FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Li, X
Shew, CY
Liu, Y
Pynn, R
Liu, E
Herwig, KW
Smith, GS
Robertson, JL
Chen, WR
AF Li, Xin
Shew, Chwen-Yang
Liu, Yun
Pynn, Roger
Liu, Emily
Herwig, Kenneth W.
Smith, Gregory S.
Robertson, J. Lee
Chen, Wei-Ren
TI Theoretical studies on the structure of interacting colloidal
suspensions by spin-echo small angle neutron scattering
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID HARD-SPHERE MODEL; INTEGRAL-EQUATION; LIGHT-SCATTERING; MIXTURES;
DYNAMICS
AB The application of the spin-echo small angle neutron scattering (SESANS) technique for structural characterization of interacting colloidal suspensions is considered in this work. The framework to calculate the theoretical SESANS correlation function is briefly laid out. A general discussion regarding the features of the SESANS correlation functions obtained from different model systems is presented. In comparison with conventional elastic scattering tools operating at the same length scale, our mean-field calculations, based on a monodisperse spherical colloidal system, show that the real-space measurement provided by SESANS presents a powerful probe for studying the intercolloid potential. The reason of this sensitivity is discussed from the standpoint of way, in which how the spatial correlations are manifested in different neutron scattering implementations. This study leads to a better understanding regarding the distinction between SANS and SESANS. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3422527]
C1 [Pynn, Roger; Herwig, Kenneth W.; Smith, Gregory S.; Chen, Wei-Ren] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
[Li, Xin; Liu, Emily] Rensselaer Polytech Inst, Dept Mech Aerosp & Nucl Engn, Troy, NY 12180 USA.
[Shew, Chwen-Yang] CUNY Coll Staten Isl, Dept Chem, Staten Isl, NY 10314 USA.
[Liu, Yun] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Liu, Yun] Univ Delaware, Dept Chem Engn, Newark, DE 19716 USA.
[Pynn, Roger] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA.
[Robertson, J. Lee] Oak Ridge Natl Lab, Neutron Facil Dev Div, Oak Ridge, TN 37831 USA.
[Chen, Wei-Ren] Univ Tennessee, Dept Chem & Biomol Engn, Knoxville, TN 37996 USA.
[Chen, Wei-Ren] Oak Ridge Natl Lab, Joint Inst Neutron Sci, Oak Ridge, TN 37831 USA.
RP Chen, WR (reprint author), Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
EM chenw@ornl.gov
RI Herwig, Kenneth/F-4787-2011; Liu, Yun/F-6516-2012; Li, Xin/K-9646-2013;
Smith, Gregory/D-1659-2016
OI Liu, Yun/0000-0002-0944-3153; Li, Xin/0000-0003-0606-434X; Smith,
Gregory/0000-0001-5659-1805
NR 44
TC 7
Z9 7
U1 0
U2 16
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAY 7
PY 2010
VL 132
IS 17
AR 174509
DI 10.1063/1.3422527
PG 14
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 593AE
UT WOS:000277422900028
PM 20459176
ER
PT J
AU Petersen, MK
Lechman, JB
Plimpton, SJ
Grest, GS
in't Veld, PJ
Schunk, PR
AF Petersen, Matt K.
Lechman, Jeremy B.
Plimpton, Steven J.
Grest, Gary S.
in't Veld, Pieter J.
Schunk, P. R.
TI Mesoscale hydrodynamics via stochastic rotation dynamics: Comparison
with Lennard-Jones fluid
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
DE hydrodynamics; lattice Boltzmann methods; Lennard-Jones potential;
molecular dynamics method; perturbation theory; rotational flow;
stochastic processes; viscosity
ID NONEQUILIBRIUM MOLECULAR-DYNAMICS; MULTIPARTICLE COLLISION DYNAMICS;
TRANSPORT-COEFFICIENTS; MODEL; SIMULATION; PARTICLE; SOLVENT; DIFFUSION
AB Stochastic rotation dynamics (SRD) is a relatively recent technique, closely related to lattice Boltzmann, for capturing hydrodynamic fluid flow at the mesoscale. The SRD method is based on simple constituent fluid particle interactions and dynamics. Here we parametrize the SRD fluid to provide a one to one match in the shear viscosity of a Lennard-Jones fluid and present viscosity measurements for a range of such parameters. We demonstrate how to apply the Muumlller-Plathe reverse perturbation method for determining the shear viscosity of the SRD fluid and discuss how finite system size and momentum exchange rates effect the measured viscosity. The implementation and performance of SRD in a parallel molecular dynamics code is also described. (c) 2010 American Institute of Physics. [doi: 10.1063/1.3419070]
C1 [Petersen, Matt K.] Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA.
[Petersen, Matt K.] Univ Utah, Ctr Biophys Modeling & Simulat, Salt Lake City, UT 84112 USA.
[Petersen, Matt K.; Lechman, Jeremy B.; Plimpton, Steven J.; Grest, Gary S.; in't Veld, Pieter J.; Schunk, P. R.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[in't Veld, Pieter J.] BASF SE, Polymer Res, D-67056 Ludwigshafen, Germany.
RP Petersen, MK (reprint author), Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA.
EM matt@hac.utah.edu
FU U.S. Department of Energy [DE-AC04-94AL85000]
FX This work was performed, in part, at the Center for Integrated
Nanotechnologies, a U. S. Department of Energy, Office of Basic Energy
Sciences user facility. Funding for this work was provided through the
National Institute for Nano-Engineering and by the Laboratory Directed
Research and Development program at Sandia National Laboratories. Sandia
National Laboratories is a multiprogram laboratory operated by Sandia
Corporation, a Lockheed-Martin Company, for the U.S. Department of
Energy under Contract No. DE-AC04-94AL85000.
NR 38
TC 16
Z9 17
U1 1
U2 25
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAY 7
PY 2010
VL 132
IS 17
AR 174106
DI 10.1063/1.3419070
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 593AE
UT WOS:000277422900007
PM 20459155
ER
PT J
AU Celliers, PM
Loubeyre, P
Eggert, JH
Brygoo, S
McWilliams, RS
Hicks, DG
Boehly, TR
Jeanloz, R
Collins, GW
AF Celliers, P. M.
Loubeyre, P.
Eggert, J. H.
Brygoo, S.
McWilliams, R. S.
Hicks, D. G.
Boehly, T. R.
Jeanloz, R.
Collins, G. W.
TI Insulator-to-Conducting Transition in Dense Fluid Helium
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID GIANT PLANETS; SHOCK; ATMOSPHERES; HYDROGEN; METAL; MODEL; GPA
AB By combining diamond-anvil-cell and laser-driven shock wave techniques, we produced dense He samples up to 1.5 g/cm(3) at temperatures reaching 60 kK. Optical measurements of reflectivity and temperature show that electronic conduction in He at these conditions is temperature-activated (semi-conducting). A fit to the data suggests that the mobility gap closes with increasing density, and that hot dense He becomes metallic above similar to 1.9 g/cm(3). These data provide a benchmark to test models that describe He ionization at conditions found in astrophysical objects, such as cold white dwarf atmospheres.
C1 [Celliers, P. M.; Eggert, J. H.; Hicks, D. G.; Collins, G. W.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Loubeyre, P.; Brygoo, S.] CEA DAM DIF, F-91297 Arpajon, France.
[McWilliams, R. S.] Washington State Univ, Inst Shock Phys, Pullman, WA 99164 USA.
[Boehly, T. R.] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA.
[Jeanloz, R.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
RP Celliers, PM (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA.
RI Collins, Gilbert/G-1009-2011; Hicks, Damien/B-5042-2015; McWilliams,
R./J-4358-2016
OI Hicks, Damien/0000-0001-8322-9983;
FU U.S. Department of Energy [DE-AC52-07NA27344]
FX We thank the reviewers for helpful comments and the OMEGA operations
staff for their invaluable assistance, M. Millerioux (CEA) for doing the
diamond coating, and W. Unites (LLNL) for preparing the quartz plates.
This work was performed under the auspices of the U.S. Department of
Energy by Lawrence Livermore National Laboratory under Contract No.
DE-AC52-07NA27344.
NR 34
TC 44
Z9 44
U1 1
U2 23
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAY 7
PY 2010
VL 104
IS 18
AR 184503
DI 10.1103/PhysRevLett.104.184503
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 592YI
UT WOS:000277417500024
PM 20482179
ER
PT J
AU Chen, H
Zhu, WG
Zhang, ZY
AF Chen, Hua
Zhu, Wenguang
Zhang, Zhenyu
TI Contrasting Behavior of Carbon Nucleation in the Initial Stages of
Graphene Epitaxial Growth on Stepped Metal Surfaces
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID AUGMENTED-WAVE METHOD; RU(0001)
AB Using first-principles calculations within density functional theory, we study the energetics and kinetics of C nucleation in the early stages of epitaxial graphene growth on three representative stepped metal surfaces: Ir(111), Ru(0001), and Cu(111). We find that on the flat surfaces of Ir(111) and Ru(0001), two C atoms repel each other, while they prefer to form a dimer on Cu(111). Moreover, the step edges on Ir and Ru surfaces cannot serve as effective trapping centers for single C adatoms, but can readily facilitate the formation of C dimers. These contrasting behaviors are attributed to the delicate competition between C-C bonding and C-metal bonding, and a simple generic principle is proposed to predict the nucleation sites of C adatoms on many other metal substrates with the C-metal bond strengths as the minimal inputs.
C1 [Chen, Hua; Zhu, Wenguang; Zhang, Zhenyu] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Chen, Hua; Zhu, Wenguang; Zhang, Zhenyu] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Zhang, Zhenyu] Univ Sci & Technol China, ICQD, Hefei 230026, Anhui, Peoples R China.
RP Chen, H (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RI Zhu, Wenguang/F-4224-2011; Chen, Hua/H-3092-2013
OI Zhu, Wenguang/0000-0003-0819-595X; Chen, Hua/0000-0003-0676-3079
FU Division of Materials Science and Engineering, Office of Basic Energy
Sciences, Department of Energy; NSF [0906025]
FX The authors thank Brandon Bell for a critical reading of the manuscript.
This work was supported by the Division of Materials Science and
Engineering, Office of Basic Energy Sciences, Department of Energy, and
in part by NSF Grant No. 0906025. The calculations were performed at
NERSC of DOE.
NR 32
TC 125
Z9 127
U1 5
U2 105
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAY 7
PY 2010
VL 104
IS 18
AR 186101
DI 10.1103/PhysRevLett.104.186101
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 592YI
UT WOS:000277417500036
PM 20482191
ER
PT J
AU Felber, FS
Waisman, EM
Mazarakis, MG
AF Felber, Franklin S.
Waisman, Eduardo M.
Mazarakis, Michael G.
TI Combined Flux Compression and Plasma Opening Switch on the Saturn Pulsed
Power Generator
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ULTRAHIGH MAGNETIC-FIELDS; CONDUCTION
AB A wire-array flux-compression cartridge installed on Sandia's Saturn pulsed power generator doubled the current into a 3-nH load to 6 MA and halved its rise time to 100 ns. The current into the load, however, was unexpectedly delayed by almost 1 mu s. Estimates of a plasma flow switch acting as a long-conduction-time opening switch are consistent with key features of the power compression. The results suggest that microsecond-conduction-time plasma flow switches can be combined with flux compression both to amplify currents and to sharpen pulse rise times in pulsed power drivers.
C1 [Felber, Franklin S.] Starmark Inc, San Diego, CA 92198 USA.
[Waisman, Eduardo M.; Mazarakis, Michael G.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Felber, FS (reprint author), Starmark Inc, POB 270710, San Diego, CA 92198 USA.
RI Felber, Francois/E-9528-2015
OI Felber, Francois/0000-0002-7611-611X
NR 28
TC 3
Z9 3
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAY 7
PY 2010
VL 104
IS 18
AR 185001
DI 10.1103/PhysRevLett.104.185001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 592YI
UT WOS:000277417500029
PM 20482184
ER
PT J
AU Hagen, G
Papenbrock, T
Hjorth-Jensen, M
AF Hagen, G.
Papenbrock, T.
Hjorth-Jensen, M.
TI Ab Initio Computation of the F-17 Proton Halo State and Resonances in
A=17 Nuclein
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SCATTERING; SYSTEMS
AB We perform coupled-cluster calculations of the energies and lifetimes of single-particle states around the doubly magic nucleus O-16 based on chiral nucleon-nucleon interactions at next-to-next-to-next-to-leading order. To incorporate effects from the scattering continuum, we employ a Gamow-Hartree-Fock basis. Our calculations for the J(pi) = 1/2(+) proton halo state in F-17 and the 1/2(+) state in O-17 agree well with experiment, while the calculated spin-orbit splitting between 5/2(+) and 3/2(+) states is too small due to the lack of three-nucleon forces. Continuum effects yield a significant amount of additional binding energy for the 1/2(+) and 3/2(+) states in O-17 and F-17.
C1 [Hagen, G.; Papenbrock, T.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
[Papenbrock, T.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Hjorth-Jensen, M.] Univ Oslo, Dept Phys, N-0316 Oslo, Norway.
[Hjorth-Jensen, M.] Univ Oslo, Ctr Math Applicat, N-0316 Oslo, Norway.
RP Hagen, G (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RI Hjorth-Jensen, Morten/B-1417-2008; Hagen, Gaute/I-6146-2012
OI Hagen, Gaute/0000-0001-6019-1687
FU U.S. Department of Energy (University of Tennessee) [DE-FG02-96ER40963];
U.S. Department of Energy (UNEDF SciDAC) [DE-FC02-07ER41457]
FX We thank W. Nazarewicz for discussions. This work was supported by the
U.S. Department of Energy, under Grants No. DE-FG02-96ER40963
(University of Tennessee), and No. DE-FC02-07ER41457 (UNEDF SciDAC).
This research used computational resources of the National Center for
Computational Sciences.
NR 39
TC 40
Z9 41
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAY 7
PY 2010
VL 104
IS 18
AR 182501
DI 10.1103/PhysRevLett.104.182501
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 592YI
UT WOS:000277417500013
PM 20482168
ER
PT J
AU Mook, HA
Lumsden, MD
Christianson, AD
Nagler, SE
Sales, BC
Jin, RY
McGuire, MA
Sefat, AS
Mandrus, D
Egami, T
dela Cruz, C
AF Mook, H. A.
Lumsden, M. D.
Christianson, A. D.
Nagler, S. E.
Sales, Brian C.
Jin, Rongying
McGuire, Michael A.
Sefat, Athena S.
Mandrus, D.
Egami, T.
dela Cruz, Clarina
TI Unusual Relationship between Magnetism and Superconductivity in
FeTe0.5Se0.5
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID YBA2CU3O6+X; EXCITATIONS
AB We use neutron scattering to study magnetic excitations in crystals near the ideal superconducting composition of FeTe0.5Se0.5. Two types of excitations are found, a resonance at (0.5,0.5,0) and incommensurate fluctuations on either side of this position. We show that the two sets of magnetic excitations behave differently with doping, with the resonance being fixed in position while the incommensurate excitations move as the doping is changed. These unusual results show that a common behavior of the low energy magnetic excitations is not necessary for pairing in these materials.
C1 [Mook, H. A.] Oak Ridge Natl Lab, Neutron Sci Directorate, Oak Ridge, TN 37831 USA.
[Lumsden, M. D.; Christianson, A. D.; Nagler, S. E.; dela Cruz, Clarina] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
[Sales, Brian C.; Jin, Rongying; McGuire, Michael A.; Sefat, Athena S.; Mandrus, D.; Egami, T.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Egami, T.; dela Cruz, Clarina] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RP Mook, HA (reprint author), Oak Ridge Natl Lab, Neutron Sci Directorate, Oak Ridge, TN 37831 USA.
EM mookhajr@ornl.gov; delacruzcr@ornl.gov
RI McGuire, Michael/B-5453-2009; Nagler, Stephen/E-4908-2010; dela Cruz,
Clarina/C-2747-2013; Mandrus, David/H-3090-2014; christianson,
andrew/A-3277-2016; Sefat, Athena/R-5457-2016; Lumsden, Mark/F-5366-2012
OI McGuire, Michael/0000-0003-1762-9406; Nagler,
Stephen/0000-0002-7234-2339; dela Cruz, Clarina/0000-0003-4233-2145;
christianson, andrew/0000-0003-3369-5884; Sefat,
Athena/0000-0002-5596-3504; Lumsden, Mark/0000-0002-5472-9660
FU Scientific User Facilities Division; Division of Materials Science and
Engineering, Office of Basic Energy Sciences, Department of Energy
FX We acknowledge helpful discussions with David Singh. Portions of this
work were supported by the Scientific User Facilities Division and the
Division of Materials Science and Engineering, Office of Basic Energy
Sciences, Department of Energy.
NR 20
TC 54
Z9 54
U1 2
U2 23
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAY 7
PY 2010
VL 104
IS 18
AR 187002
DI 10.1103/PhysRevLett.104.187002
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 592YI
UT WOS:000277417500046
PM 20482201
ER
PT J
AU Blackstock, JJ
Long, JCS
AF Blackstock, Jason J.
Long, Jane C. S.
TI Shifting the Debate on Geoengineering Response
SO SCIENCE
LA English
DT Letter
C1 [Blackstock, Jason J.] Int Inst Appl Syst Anal, A-2361 Laxenburg, Austria.
[Blackstock, Jason J.] Ctr Int Governance Innovat, Waterloo, ON N2L 6C2, Canada.
[Long, Jane C. S.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Blackstock, JJ (reprint author), Int Inst Appl Syst Anal, A-2361 Laxenburg, Austria.
EM jjb@iiasa.ac.at
NR 3
TC 0
Z9 0
U1 1
U2 7
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
J9 SCIENCE
JI Science
PD MAY 7
PY 2010
VL 328
IS 5979
BP 691
EP 691
PG 1
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 592DZ
UT WOS:000277357100019
ER
PT J
AU English, NB
Dettman, DL
Sandquist, DR
Williams, DG
AF English, Nathan B.
Dettman, David L.
Sandquist, Darren R.
Williams, David G.
TI Daily to decadal patterns of precipitation, humidity, and photosynthetic
physiology recorded in the spines of the columnar cactus, Carnegiea
gigantea
SO JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
LA English
DT Article
DE Carnegiea gigantea; Saguaro
ID CRASSULACEAN ACID METABOLISM; VAPOR-PRESSURE DEFICIT;
FEROCACTUS-ACANTHODES; OPUNTIA-INERMIS; CACTACEAE; GROWTH; CAM; CO2;
DESERT; DISCRIMINATION
AB Isotopic analyses of cactus spines grown serially from the apex of long-lived columnar cactuses may be useful for climatological and ecological studies if time series can be reliably determined from spines. To characterize the timescales over which spines may record this information, we measured spine growth in saguaro cactus over days, months, and years with time-lapse photography, periodic marking, and postbomb radiocarbon dating and then analyzed isotopic variability over these same timescales and compared these measurements to local climate. We used daily increments of growth, visible as transverse bands of light and dark tissue in spines, as chronometers to develop diurnally resolved delta C-13 and delta O-18 records from three spines grown in series over a 70 day period. We also constructed a 22 year record of delta C-13 variations from spine tips arranged in chronological sequence along the side of a 4 m tall, single-stemmed saguaro. We evaluated two mechanisms potentially responsible for daily, weekly, and annual variability in delta C-13 values of spines; both related to vapor pressure deficit (VPD). Our data suggest that stomatal conductance is unlikely to be the determinant of delta C-13 variation in spines. We suggest that either VPD-induced changes in the balance of nighttime- and daytime-assimilated CO2 or mesophyll-limited diffusion of CO2 at night are the most likely determinant of delta C-13 variation in spines. Intra-annual and interannual variability of delta O-18 in spine tissue appears to be controlled by the mass balance of O-18-depleted water taken up after rain events and evaporative enrichment of O-18 in tissue water between rains. We were able to estimate the annual growth and areole generation rate of a saguaro cactus from its 22 yearlong isotopic record because VPD, rainfall, and evaporation exhibit strong annual cycles in the Sonoran Desert and these variations are recorded in the oxygen and carbon isotope ratios of spines.
C1 [English, Nathan B.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Dettman, David L.] Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA.
[Williams, David G.] Univ Wyoming, Dept Renewable Resources, Laramie, WY 82071 USA.
[Sandquist, Darren R.] Calif State Univ Fullerton, Dept Biol Sci, Fullerton, CA 92834 USA.
[Williams, David G.] Univ Wyoming, Dept Bot, Laramie, WY 82071 USA.
RP English, NB (reprint author), Los Alamos Natl Lab, EES 14,MSJ495, Los Alamos, NM 87545 USA.
EM nenglish@lanl.gov
RI English, Nathan/B-4615-2008; Williams, David/A-6407-2014
OI English, Nathan/0000-0002-6936-8079; Williams, David/0000-0003-3627-5260
FU United States Environmental Protection Agency (EPA); National Science
Foundation [IOS 0717395, IOS 0717403]; RVDE; USGS [04WRAG0034]
FX The research described in this paper has been funded in part by the
United States Environmental Protection Agency (EPA) under the Science to
Achieve Results (STAR) Graduate Fellowship Program, and by the National
Science Foundation (grants IOS 0717395 and IOS 0717403). D. R. S. was
supported by the RVDE, USGS Assistance Award, 04WRAG0034. We are
thankful to C. Funnicelli, M. Weesner, M. Daniels, and Saguaro National
Park for providing access to Steenbergh and Lowes' original notes and
allowing us to sample within the park (permit SAGU-2004-SCI-0012). H.
Griffiths and an anonymous reviewer provided useful comments that
improved this manuscript. G. Bowen and J. Quade generously provided lab
space and supplies. Valuable discussions, data, and field assistance
were provided by K. Anchukitus, J. Betancourt, J. Cole, T. Drezner, C.
Eastoe, M. Fan, Q. Hua, S. Leavitt, M. Mason, J. Mauseth, J. Overpeck,
W. Peachy, D. Potts, T. Shanahan, S. Stutz, and R. Turner. This paper is
dedicated to the late C. Burkhardt, who was a dear friend and provided
invaluable technical assistance during this study.
NR 43
TC 6
Z9 6
U1 5
U2 24
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-8953
EI 2169-8961
J9 J GEOPHYS RES-BIOGEO
JI J. Geophys. Res.-Biogeosci.
PD MAY 6
PY 2010
VL 115
AR G02013
DI 10.1029/2009JG001008
PG 12
WC Environmental Sciences; Geosciences, Multidisciplinary
SC Environmental Sciences & Ecology; Geology
GA 593RW
UT WOS:000277479000001
ER
PT J
AU Singh, DMDJ
Pradeep, T
Thirumoorthy, K
Balasubramanian, K
AF Singh, D. M. David Jeba
Pradeep, T.
Thirumoorthy, Krishnan
Balasubramanian, Krishnan
TI Closed-Cage Tungsten Oxide Clusters in the Gas Phase
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID EFFECTIVE CORE POTENTIALS; ASSISTED-LASER-DESORPTION/IONIZATION;
MOLECULAR CALCULATIONS; TRANSITION-METAL; ELECTRONIC-STRUCTURES;
DENSITY; IONS; WO3; REACTIVITY; BEHAVIOR
AB During the course of a study on the clustering of W-Se and W-S mixtures in the gas phase using laser desorption ionization (LDI) mass spectrometry, we observed several anionic W-O clusters. Three distinct species, W(6)O(19)(-), W(13)O(29)(-), and W(14)O(32)(-), stand out as intense peaks in the regular mass spectral pattern of tungsten oxide clusters suggesting unusual stabilities for them. Moreover, these clusters do not fragment in the postsource decay analysis. While trying to understand the precursor material, which produced these clusters, we found the presence of nanoscale forms of tungsten oxide. The structure and thermodynamic parameters of tungsten clusters have been explored using relativistic quantum chemical methods. Our computed results of atomization energy are consistent with the observed LDI mass spectra. The computational results suggest that the clusters observed have closed-cage structure. These distinct W(13) and W(14) clusters were observed for the first time in the gas phase.
C1 [Singh, D. M. David Jeba; Pradeep, T.] Indian Inst Technol, Dept Chem, DST Unit Nanosci, Madras 600036, Tamil Nadu, India.
[Singh, D. M. David Jeba; Pradeep, T.] Indian Inst Technol, Sophisticated Analyt Instrument Facil, Madras 600036, Tamil Nadu, India.
[Thirumoorthy, Krishnan; Balasubramanian, Krishnan] Calif State Univ Hayward, Coll Sci, Hayward, CA 94542 USA.
[Balasubramanian, Krishnan] Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA.
[Balasubramanian, Krishnan] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Pradeep, T (reprint author), Indian Inst Technol, Dept Chem, DST Unit Nanosci, Madras 600036, Tamil Nadu, India.
EM pradeep@iitm.ac.in; balu@llnl.gov
RI Krishnan, Thirumoorthy/B-9967-2011
FU Department of Science and Technology; U.S. Department of Energy
[DE-FG2-05ER15657, W-7405-Eng-48]
FX The nanomaterials program at IIT, Madras is supported by the Department
of Science and Technology. D.M.D.J.S. was supported by a Swarnajayanti
Fellowship awarded to T.P. The work at Cal State was supported by the
U.S. Department of Energy under Grant DE-FG2-05ER15657. The work at LLNL
was performed under the auspices of U.S. Department of Energy under
Contract No. W-7405-Eng-48.
NR 38
TC 6
Z9 6
U1 0
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD MAY 6
PY 2010
VL 114
IS 17
BP 5445
EP 5452
DI 10.1021/jp911922a
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 588FM
UT WOS:000277053400002
PM 20377209
ER
PT J
AU Edwards, LW
Ryazanov, M
Reisler, H
Klippenstein, SJ
AF Edwards, L. W.
Ryazanov, M.
Reisler, H.
Klippenstein, S. J.
TI D-Atom Products in Predissociation of CD2CD2OH from the 202-215 nm
Photodissociation of 2-Bromoethanol
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID PHOTOIONIZATION MASS-SPECTROMETRY; VINYL ALCOHOL; BOND-DISSOCIATION;
RADICALS; OH; MOLECULES; CHEMISTRY; KINETICS; ETHYLENE; SPECTRA
AB Experimental observations of D fragments from the predissociation of rovibrationally excited partially deuterated 2-hydroxyethyl radicals, CD2CD2OH, are reported, and possible dissociation channels are analyzed by theory. The radicals are produced by photolysis of 2-bromoethanol at 202-215 nm, and some of them have sufficient internal energy to predissociate. D fragments are detected by 1 + 1' REMPI and their TOF distributions are determined. They can be associated with vinyl alcohol and/or acetaldehyde cofragments. From analysis of the maximum velocities and kinetic energies of the observed D fragments it is concluded that they originate from the decomposition of CD2CD2OH, but the experimental resolution is insufficient to distinguish between the two possible channels leading to D products. Theoretical analysis and RRKM calculations of microcanonical dissociation rates and branching ratios for the range of available excess energies (up to 5000-8000 cm(-1) above the OH + C2D4 threshold) indicate that the D-producing channels are minor (about 1%) compared to the predominant OH + C2D4 channel, and the branching ratio for D production is more favorable when the reactant radicals have low rotational energy. The vinyl alcohol channel is strongly favored over the acetaldehyde channel at all excess energies, except near the threshold of these channels.
C1 [Edwards, L. W.; Ryazanov, M.; Reisler, H.] Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA.
[Klippenstein, S. J.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Reisler, H (reprint author), Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA.
EM reisler@usc.edu
OI Klippenstein, Stephen/0000-0001-6297-9187
FU Division of Chemical Sciences, Geosciences, and Biosciences; Office of
Basic Energy Sciences; U.S. Department of Energy [DE-FG02-05ER15629,
DE-ACO2-06CH11357]
FX The authors wish to thank Dr. Ksenia Bravaya for theoretical
calculations of harmonic frequencies, Dr. Stephen Pratt and Dr. Boris
Karpichev for helpful discussions, and Professor Laurie Butler for
communicating results prior to publications. H.R. and S.J.K. acknowledge
support of the Division of Chemical Sciences, Geosciences, and
Biosciences, the Office of Basic Energy Sciences, the U.S. Department of
Energy (grant DE-FG02-05ER15629 and contract No. DE-ACO2-06CH11357,
respectively).
NR 39
TC 7
Z9 7
U1 0
U2 10
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD MAY 6
PY 2010
VL 114
IS 17
BP 5453
EP 5461
DI 10.1021/jp100203v
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 588FM
UT WOS:000277053400003
PM 20380395
ER
PT J
AU Wilding, MC
Benmore, CJ
Weber, JKR
AF Wilding, M. C.
Benmore, C. J.
Weber, J. K. R.
TI High-Energy X-ray Diffraction from Aluminosilicate Liquids
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID SIO2-AL2O3 GLASSES; COMPUTER-SIMULATION; HIGH-TEMPERATURE; SILICATE;
DYNAMICS; MELTS; SCATTERING; DENSITIES; ALUMINA; SYSTEM
AB Containerless high energy X-ray diffraction measurements have been performed on molten Al2O3-SiO2 as a function of composition. The data show a strong distortion of the SiO4 tetrahedral units and a breakdown of intermediate range order as alumina is added. For silica-rich compositions, the X-ray pair distribution functions are consistent with the presence of 4-fold oxygen triclusters predicted by molecular dynamics simulations, where these liquids exhibit relatively high viscosities compared to other binary silicates. For higher alumina content liquids, the average cation-oxygen coordination number gradually increases with increasing Al2O3 content, but the pair distribution functions change very little with composition, suggesting the increased presence of disordered AlOn (n = 4,5,6) polyhedra are associated with low viscosity melts. A comparison of the liquid and glassy X-ray pair distributions functions at the alumina-rich mullite composition indicate a significant distortion of the polyhedra in the melt, suggesting structural changes are temperature dependent.
C1 [Benmore, C. J.; Weber, J. K. R.] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA.
[Weber, J. K. R.] Mat Dev Inc, Arlington Hts, IL 60004 USA.
[Wilding, M. C.] Aberystwyth Univ, Inst Math & Phys Sci, Aberystwyth SY23 3BZ, Dyfed, Wales.
RP Benmore, CJ (reprint author), Argonne Natl Lab, Xray Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
OI Benmore, Chris/0000-0001-7007-7749
FU U.S. DOE Argonne National Laboratory [DE-AC02-06CH11357]; EPSRC
[EP/E026818/1]; Aberystwyth University Senate Research Fund
FX This work was supported by the U.S. DOE Argonne National Laboratory
under Contract Number DE-AC02-06CH11357, an EPSRC overseas travel grant
(EP/E026818/1), and the Aberystwyth University Senate Research Fund. Dr.
S. L. Kearns and Dr. Qiang Mei are thanked for their help.
NR 36
TC 5
Z9 5
U1 1
U2 6
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD MAY 6
PY 2010
VL 114
IS 17
BP 5742
EP 5746
DI 10.1021/jp907587e
PG 5
WC Chemistry, Physical
SC Chemistry
GA 588FR
UT WOS:000277053900015
PM 20392091
ER
PT J
AU Daschbach, JL
Sun, XQ
Thallapally, PK
McGrail, BP
Dang, LX
AF Daschbach, John L.
Sun, Xiuquan
Thallapally, Praveen K.
McGrail, B. Peter
Dang, Liem X.
TI Grand Canonical Monte Carlo Studies of CO2 and CH4 Adsorption in
p-tert-Butylcalix[4]Arene
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID METAL-ORGANIC FRAMEWORKS; ZEOLITIC IMIDAZOLATE FRAMEWORKS; SMALL GUEST
MOLECULES; DER-WAALS HOST; CARBON-DIOXIDE; PORE-SIZE; FREE-ENERGIES;
INDUCED TRANSFORMATION; C-168 SCHWARZITE; ACTIVATED CARBON
AB Grand Canonical Monte Carlo simulations were performed for single component isotherms of CO2 and CH4 in the p-tert-butylcalix[4]arene structure. Comparison with literature data for adsorption used the Peng-Robinson equation of state to map simulated fugacitics to experimentally determined pressures. CO2 binding in the high-pressure structure of TBC4 (TBC4-H) occurs in two distinct waves. The cage sites in TBC4 completely fill up, followed by the filling of interstitial sites, resulting in the sum of two Langmuir isotherms being the best way to describe the total absorption isotherms. Our simulation results capture the essential experimental feature that the cage sites are the major contributor to the absorption isotherms, and the contribution of interstitial sites are significantly less. We found that CH4 does not exhibit the same two-site binding characteristic and has a smaller temperature dependence, which arises from a smaller negative entropy change upon absorption compared with the case for CO2. Our calculations give higher binding than observed experimentally for the cage site but lower binding for the interstitial site. We also demonstrate that by resealing the interaction between CO2 and the lattice, the results can reproduce the experimental data well at low loadings, The resealed potentials are within the range found in other studies. This makes the discrepancy between experiment and simulation at high loadings greater, which is unexpected for this system. It is postulated that the simulation points to structural changes or defects being partially responsible for the relatively higher absorption found experimentally.
C1 [Daschbach, John L.; Sun, Xiuquan; Thallapally, Praveen K.; McGrail, B. Peter; Dang, Liem X.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Dang, LX (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
RI Garcia-Sanchez, Almudena/B-3303-2009; thallapally, praveen/I-5026-2014
OI thallapally, praveen/0000-0001-7814-4467
FU Pacific Northwest National Laboratory (PNNL); Division of Chemical
Sciences, Geosciences and Bio-sciences, Office of Basic Energy Sciences,
U.S. Department of Energy (DOE); National Energy Technology Laboratory
of DOE's Office of Fossil Energy
FX This work was performed at the Pacific Northwest National Laboratory
(PNNL) and was supported by the Division of Chemical Sciences,
Geosciences and Bio-sciences, Office of Basic Energy Sciences, U.S.
Department of Energy (DOE). PNNL is operated by Battelle for the DOE. We
also gratefully acknowledge support received from the National Energy
Technology Laboratory of DOE's Office of Fossil Energy.
NR 38
TC 4
Z9 4
U1 1
U2 9
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD MAY 6
PY 2010
VL 114
IS 17
BP 5764
EP 5768
DI 10.1021/jp9101465
PG 5
WC Chemistry, Physical
SC Chemistry
GA 588FR
UT WOS:000277053900018
PM 20387868
ER
PT J
AU Cauet, E
Valiev, M
Weare, JH
AF Cauet, Emilie
Valiev, Marat
Weare, John H.
TI Vertical Ionization Potentials of Nucleobases in a Fully Solvated DNA
Environment
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID MOLECULAR-ORBITAL CALCULATIONS; VALENCE ELECTRONIC-STRUCTURE;
DENSITY-FUNCTIONAL THEORY; NUCLEIC-ACID BASES; QUANTUM-MECHANICAL
CHARACTERIZATION; COUPLED-CLUSTER METHODS; AB-INITIO CALCULATIONS;
GAS-PHASE TAUTOMERISM; B-FORM DNA; PHOTOELECTRON-SPECTROSCOPY
AB Vertical ionization potentials (IPs) of nucleobases embedded in a fully solvated DNA fragment (12-mer B-DNA fragment 22 sodium counterions + 5760 water molecules equilibrated to 298 K) have been calculated using a combined quantum mechanical molecular mechanics (QM/MM) approach. Calculations of the vertical IP of the anion Cl- arc reported that support the accuracy of the application of a QM/MM method to this problem. It is shown that the pi nucleotide HOMO origin for the emitted electron is localized on the base by the hydration structure surrounding the DNA in a way similar to that recently observed for pyrimidine nucleotides in aqueous solutions (Slavicek, P.; et al. J. Am. Chem. Soc. 2009, 131, 6460). In a first step, a high level of theory. CCSD(T)/aug-cc-pVDZ, was used to calculate the vertical IP of each of the four single bases isolated in the QM region while the remaining DNA fragment, counterions, and water solvent molecules were included in the MM region. The calculated vertical IPs show a large positive shift of 3.2-3.3 eV compared to the corresponding gas-phase values. This shift is similar for all four DNA bases. The origin of the large increase in vertical IPs of nucleobases is found to be the long-range electrostatic interactions with the solvation structure outside the DNA helix. Thermal fluctuations in the fluid can result in IP changes of roughly I eV on a picosecond time scale. IPs of pi-stacked and H-bonded clusters of DNA bases were also calculated using the same QM/MM model but with a lower level of theory, B3LYP/6-31G(d=0.2). An IP shift of 4.02 eV relative to the gas phase is found for a four-base-pair B-DNA duplex configuration. The primary goal of this work was to estimate the influence of long-range solvation interactions on the ionization properties of DNA bases rather than provide highly precise IP evaluations. The QM/MM model presented in this work provides an attractive method to treat the difficult problem of incorporating a detailed long-range structural model of physiological conditions into investigations of the electronic processes in DNA.
C1 [Cauet, Emilie; Weare, John H.] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA.
[Valiev, Marat] Pacific NW Natl Lab, William R Wiley Environm Mol Sci Lab, Richland, WA 99352 USA.
RP Cauet, E (reprint author), Univ Libre Bruxelles, Serv Chim Quant & Photophys, CP 160-09,50 Ave FD Roosevelt, B-1050 Brussels, Belgium.
EM ecauet@ulb.ac.be
FU DOE BES [DE-FG02-06ER15767]; NSF [EAR0545811]; Northwest National
Laboratory (PNNL); U.S. Department of Energy (DOE); Office of Basic
Energy Sciences, Chemical Sciences. Gcosciences, and Biosciences
Division; DOE's Office of Biological and Environmental Research
[DE-AC06-76RL0-1830]
FX E.C. thanks the Belgian American Educational Foundation (B.A.E.F.) for a
postdoc fellowship and the F.R.S.-FNRS (Fonds National de la Recherche
Scientifique dc Belgique). A portion of this work was supported by DOE
BES grant #DE-FG02-06ER15767 and NSF grant #EAR0545811. Support to M.V.
from DOE ASCR Multiscale Mathematics program and Office of Naval
Research is gratefully acknowledged. The work at Pacific Northwest
National Laboratory (PNNL) was supported by the U.S. Department of
Energy (DOE), Office of Basic Energy Sciences, Chemical Sciences.
Gcosciences, and Biosciences Division. Computational resources were
provided by the Molecular Science Computing Facility (MSCF) in the
William R. Wiley Environmental Molecular Sciences Laboratory (EMSL)
funded by DOE's Office of Biological and Environmental Research.
Battelle operates PNNL for DOE under contract DE-AC06-76RL0-1830.
Discussions with Karol Kowalski are much appreciated. Stephen E.
Bradforth is acknowledged for helpful discussions.
NR 106
TC 33
Z9 33
U1 2
U2 31
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD MAY 6
PY 2010
VL 114
IS 17
BP 5886
EP 5894
DI 10.1021/jp9120723
PG 9
WC Chemistry, Physical
SC Chemistry
GA 588FR
UT WOS:000277053900034
PM 20394358
ER
PT J
AU Odbadrakh, K
Lewis, JP
Nicholson, DM
AF Odbadrakh, Khorgolkhuu
Lewis, James P.
Nicholson, Donald M.
TI Interaction of the Explosive Molecules RDX and TATP with IRMOF-8
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID DENSITY-FUNCTIONAL-THEORY; METAL-ORGANIC FRAMEWORKS; AB-INITIO
SIMULATION; ENERGETIC MATERIALS; SORPTION PROPERTIES;
ELECTRONIC-STRUCTURE; HYDROGEN STORAGE; DYNAMICS; DEFECTS; SYSTEMS
AB We report our investigations on physisorption and trapping of high explosive (HE) molecules 1,3,5-trinitro-s-triazine or cyclotrimethylene trinitramine (RDX) and triacetone triperoxide (TATP) by an isoreticular metal organic framework (IRMOF) IRMOF-8. In general, IRMOFs are known for their high porosity and tailorability, thus having potential applications as preconcentrators, and gas storage. In particular, IRMOF-8 has higher hydrogen uptake than the extensively studied IRMOF-1, thus having the potential to act as preconcentrators for explosive molecules. We employed the ab initio density functional theory (DFT) code FIREBALL to estimate physisorption interactions for the RDX and TATP molecules with interior and exterior surfaces of IRMOF-8. At zero temperature, RDX yields several physisorption type binding configurations, while TATP remains more inert to interactions with IRMOF-8. Molecular dynamics simulations at room temperature result in trapping configurations preferring TATP inside the IRMOF-8 cage, which could be attributed to molecular sieving effects.
C1 [Odbadrakh, Khorgolkhuu; Lewis, James P.] W Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA.
[Nicholson, Donald M.] Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA.
RP Odbadrakh, K (reprint author), W Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA.
EM od.odbadrakh@mail.wvu.edu; james.lewis@mail.wvu.edu
FU National Science Foundation (NSF) [CMMI-0730207]; Division of Materials
Science and Engineering, Office of Basic Energy Science of the U.S.
Department of Energy
FX We thank for Dr. D. Keffer, J. Leszczynski, and A. Michalkova for their
insightful discussions. We gratefully acknowledge the financial support
of National Science Foundation (NSF) under grant CMMI-0730207. Work at
ORNL was performed under the auspices of the Division of Materials
Science and Engineering, Office of Basic Energy Science of the U.S.
Department of Energy. Also, we thank the Pittsburgh Supercomputing
Center and WVNano for computing facilities.
NR 52
TC 14
Z9 14
U1 3
U2 37
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD MAY 6
PY 2010
VL 114
IS 17
BP 7535
EP 7540
DI 10.1021/jp906192g
PG 6
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 588FO
UT WOS:000277053600002
ER
PT J
AU LaBrosse, MR
Johnson, JK
AF LaBrosse, Matthew R.
Johnson, J. Karl
TI Defect and Nondefect Interstitial Channel Availability in Carbon
Nanotube Bundles: Comparison of Modeling with Experiments
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID SINGLE-WALLED CARBON; HYBRID MONTE-CARLO; HYDROGEN STORAGE; GLOBAL
OPTIMIZATION; MOLECULAR SIMULATION; GAS-ADSORPTION; PATH-INTEGRALS;
ENERGY; NEON; METHANE
AB There is a controversy in the literature over whether small gases, such as Ne, can adsorb in the interstitial channels (ICs) of carbon nanotube bundles. We distinguish between two types of ICs: nondefect, defined as ICs in perfectly packed arrays of nanotubes having all of the same diameter (homogeneous) defined where three tubes meet, and defect ICs, present in bundles composed of nanotubes having different diameters (heterogeneous) where four or more tubes meet. We have performed grand-canonical Monte Carlo simulations of Ne on various model carbon nanotube bundles in order to explore the role of nondefect and defect ICs in adsorption. We have performed simulations on closed and partially opened homogeneous and heterogeneous bundles. We have computed the specific surface area, the isosteric heats of adsorption, and adsorption isotherms from our simulations, and we have compared these values to experimentally measured quantities for Ne adsorption on carbon nanotubes produced by the HiPco process. Analysis of our results indicates that gases do not adsorb in nondefect ICs. When considering Ne adsorption alone, there is ambiguity about whether homogeneous or heterogeneous bundles are better models. However, taken together with previous work on Ar, CH4, and Xe, we conclude that a model consisting of heterogeneous bundles with similar to 11% open nanotubes, having nondefect ICs blocked, but allowing adsorption in the defect interstitials best describes the reported experimental data for these gases on HiPco nanotubes. Furthermore, we find that quantum mechanical diffraction effects must be taken into account for modeling Ne adsorption at the experimental conditions.
C1 [LaBrosse, Matthew R.; Johnson, J. Karl] Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
[LaBrosse, Matthew R.; Johnson, J. Karl] Univ Pittsburgh, Dept Chem & Petr Engn, Pittsburgh, PA 15261 USA.
RP Johnson, JK (reprint author), Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
EM karlj@pitt.edu
RI Johnson, Karl/E-9733-2013
OI Johnson, Karl/0000-0002-3608-8003
FU RDS [DE-AC26-04NT41817]
FX This technical effort is performed in support of the National Energy
Technology Laboratory's ongoing research in the area of computational
chemistry under the RDS contract DE-AC26-04NT41817. We thank Vaiva
Krungleviciute and Aldo Migone for many helpful discussions and for
sharing their unpublished data with us. We thank Oscar Vilches for many
helpful discussions.
NR 90
TC 15
Z9 15
U1 0
U2 12
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD MAY 6
PY 2010
VL 114
IS 17
BP 7602
EP 7610
DI 10.1021/jp910966e
PG 9
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 588FO
UT WOS:000277053600012
ER
PT J
AU Gardner, TH
Spivey, JJ
Kugler, EL
Campos, A
Hissam, JC
Roy, AD
AF Gardner, Todd H.
Spivey, James J.
Kugler, Edwin L.
Campos, Andrew
Hissam, Jason C.
Roy, Amitava D.
TI Structural Characterization of Ni-Substituted Hexaaluminate Catalysts
Using EXAFS, XANES, XPS, XRD, and TPR
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID RAY-ABSORPTION SPECTROSCOPY; PARTIAL OXIDATION; CARBON-DIOXIDE;
SYNTHESIS GAS; COMBUSTION; METHANE; BA; DECOMPOSITION; DEACTIVATION;
ALUMINATE
AB The structure of five Ni-substituted Ba(0.75)Ni(y)A(12-y)O(19-delta) hexaaluminate catalysts at various Ni loadings (y = 0.2, 0.4, 0.6, 0.8 and 1.0) was investigated using EXAFS, XANES, XPS, XRD, and TPR. As Ni-substitution into the hexaaluminate lattice is increased, the unit cell dimension decreases along the c axis. This systematic change is consistent with Ni substitution for Al3+ in the hexaaluminate crystalline structure. XANES analysis suggests that Ni-O bonding is stronger for Ni substituted into the hexaaluminate lattice, relative to that of bulk NiO. The average coordination numbers obtained from EXAFS indicate that Ni is preferentially exchanging with tetrahedrally coordinated Al3+ in the structure which predominates in regions of the hexaaluminate unit cell near the mirror plane. It is at these sites that, preferential substitution of Ni2+ likely occurs to minimize strain in the crystalline lattice.
C1 [Gardner, Todd H.] US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA.
[Spivey, James J.; Campos, Andrew] Louisiana State Univ, Cain Dept Chem Engn, Baton Rouge, LA 70803 USA.
[Kugler, Edwin L.; Hissam, Jason C.] W Virginia Univ, Dept Chem Engn, Morgantown, WV 26506 USA.
[Roy, Amitava D.] Louisiana State Univ, J Bennett Johnson Sr Ctr Adv Microstruct & Device, Baton Rouge, LA 70806 USA.
RP Gardner, TH (reprint author), US DOE, Natl Energy Technol Lab, 3610 Collins Ferry Rd,POB 880, Morgantown, WV 26507 USA.
EM todd.gardner@netl.doe.gov
FU NETL-URI
FX XRD measurements were conducted at beamline X7B of the National
Synchrotron Light Source at Brookhaven National Laboratory, Upton, NY.
EXAFS data was collected at the DCM beamline, J. Bennett Johnston, Sr.,
Center for Advanced Microstructures and Devices at Louisiana State
University. Mr. James Poston contributed invaluable assistance to this
investigation. Funding assistance was provided through the NETL-URI
program.
NR 35
TC 24
Z9 24
U1 0
U2 40
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD MAY 6
PY 2010
VL 114
IS 17
BP 7888
EP 7894
DI 10.1021/jp9117634
PG 7
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 588FO
UT WOS:000277053600052
ER
PT J
AU Ribeiro, MC
Jacobs, G
Davis, BH
Cronauer, DC
Kropf, AJ
MarshaW, CL
AF Ribeiro, Mauro C.
Jacobs, Gary
Davis, Burtron H.
Cronauer, Donald C.
Kropf, A. Jeremy
MarshaW, Christopher L.
TI Fischer-Tropsch Synthesis: An In-Situ TPR-EXAFS/XANES Investigation of
the Influence of Group I Alkali Promoters on the Local Atomic and
Electronic Structure of Carburized Iron/Silica Catalysts
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID RAY-ABSORPTION SPECTROSCOPY; FINE-STRUCTURE; BOND-LENGTH; IRON;
BEHAVIOR; PHASE; DIFFRACTION; SELECTIVITY; CO
AB The promoting impact of alkali metals (i.e., Li, Na, K, Rb, Cs) on the carburization rate of Fe in Fe/Si catalysts was investigated by X-ray absorption spectroscopy. A multisample holder was used, allowing nearly simultaneous examination of the catalysts during activation in a CO/He mixture. With the white line intensity and shape as a fingerprint for oxidation state, TPR/XANES analysis enabled us to measure the relative composition of the different compounds as a function of the carburization time, temperature, and atomic number of the group 1 promoter. At the same time, TPR/EXAFS provided information on the changes in local atomic structure that accompanied the oxidation state changes. The rate of carburization increased in the following order: unpromoted < Li < Na < K = Rb = Cs. After 10 h of treatment the samples containing K, Rb, and Cs were completely carburized, and residual quantities of iron oxides were detected in both unpromoted and Li-promoted samples. The EXAFS spectra after carburization could be fitted well by considering a model containing Hagg carbide and Fe(3)O(4). After 10 h of CO/He treatment at 290 degrees C, the main component observed was Hagg carbide. A model containing Hagg and epsilon-carbides, and Fe(3)O(4), was also investigated. However, the r-factor was not significantly impacted by including epsilon-carbide in the fitting, and the resulting contribution of epsilon-carbide in each catalyst from the model was virtually negligible. Selectivity differences are thus not likely due to changes in the carbide distribution. Rather, the alkali promoter increases the CO dissociative adsorption rate, resulting in an increase in the surface coverage of dissociated CO and an inhibition in the olefin readsorption rate. This in turn results in higher olefin selectivities, in agreement with previous catalytic tests.
C1 [Ribeiro, Mauro C.; Jacobs, Gary; Davis, Burtron H.] Univ Kentucky, Ctr Appl Energy Res, Lexington, KY 40511 USA.
[Cronauer, Donald C.; Kropf, A. Jeremy; MarshaW, Christopher L.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Davis, BH (reprint author), Univ Kentucky, Ctr Appl Energy Res, 2540 Res Pk Dr, Lexington, KY 40511 USA.
RI ID, MRCAT/G-7586-2011; Jacobs, Gary/M-5349-2015
OI Jacobs, Gary/0000-0003-0691-6717
FU Kentucky Governor's Office of Energy Policy [08-GOEP-02]; U.S.
Department of Energy (DOE), Office of Fossil Energy, Office of Science,
Office of Basic Energy Sciences [DE-AC02-06CH11357]; National Energy
Technology Laboratory (NETL); MRCAT
FX The work carried out at the CAER was supported in part by funding from a
seed grant from the Kentucky Governor's Office of Energy Policy
(Solicitation 08-GOEP-02), as well as the Commonwealth of Kentucky.
Argonne's research was supported in part by the U.S. Department of
Energy (DOE), Office of Fossil Energy, National Energy Technology
Laboratory (NETL). The use of the Advanced Photon Source was supported
by the U.S. Department of Energy, Office of Science, Office of Basic
Energy Sciences, under Contract DE-AC02-06CH11357. MRCAT operations are
supported by the Department of Energy and the MRCAT member institutions.
NR 32
TC 45
Z9 47
U1 6
U2 40
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD MAY 6
PY 2010
VL 114
IS 17
BP 7895
EP 7903
DI 10.1021/jp911856q
PG 9
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 588FO
UT WOS:000277053600053
ER
PT J
AU Mantz, YA
Gemmen, RS
AF Mantz, Yves A.
Gemmen, Randall S.
TI Protonated Forms of Monoclinic Zirconia: A Theoretical Study
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID INITIO MOLECULAR-DYNAMICS; GENERALIZED GRADIENT APPROXIMATION;
DENSITY-FUNCTIONAL CALCULATIONS; YTTRIA-STABILIZED ZIRCONIA;
TOTAL-ENERGY CALCULATIONS; PEROVSKITE-TYPE OXIDES; AUGMENTED-WAVE
METHOD; AB-INITIO; ELECTRONIC-STRUCTURE; WIDE-GAP
AB In various materials applications of zirconia, protonated forms of monoclinic zirconia may be formed, motivating their study within the framework of density-functional theory. Using the HCTH/120 exchange-correlation functional, the equations of state of yttria and of the three low-pressure zirconia polymorphs are computed, to verify our approach. Next, the favored charge state of a hydrogen atom in monoclinic zirconia is shown to be positive for all Fermi-level energies in the band gap, by the computation of defect formation energies. This result is consistent with a single previous theoretical prediction at midgap as well as muonium spectroscopy experiments. For the formally positively (+1e) charged system of a proton in monoclinic zirconia (with a homogeneous neutralizing background charge density implicitly included), modeled using up to a 3 x 3 x 3 arrangement of unit cells, different stable and metastable structures are identified. They are similar to those structures previously proposed for the neutral system of hydrogen-doped monoclinic zirconia, at a similar level of theory. As predicted using the HCTH/120 functional, the lowest energy structure of the proton bonded to one of the two available oxygen atom types, O1, is favored by 0.39 eV compared to that of the proton bonded to O2. The rate of proton transfer between O1 ions is slower than that for hydrogen-doped monoclinic zirconia, whose transition-state structures may be lowered in energy by the extra electron.
C1 [Mantz, Yves A.; Gemmen, Randall S.] US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA.
RP Mantz, YA (reprint author), US DOE, Natl Energy Technol Lab, 3610 Collins Ferry Rd & POB 880, Morgantown, WV 26507 USA.
EM yves.mantz@netl.doe.gov
FU National Science Foundation
FX We would like to thank Dr. Jacob Gavartin for providing a reprint of ref
16. This research was supported in part by the National Science
Foundation through TeraGrid resources provided by Pittsburgh
Supercomputing Center. The Bader analyses were performed using the
program bader (v0.26a). The density-of-states plots were generated using
the program dosplot. Selected figures were prepared using the VMD
Molecular Graphics Viewer.91
NR 92
TC 9
Z9 9
U1 1
U2 9
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD MAY 6
PY 2010
VL 114
IS 17
BP 8014
EP 8025
DI 10.1021/jp810601j
PG 12
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 588FO
UT WOS:000277053600068
ER
PT J
AU Sarkar, SK
Kim, JY
Goldstein, DN
Neale, NR
Zhu, K
Elliot, CM
Frank, AJ
George, SM
AF Sarkar, Shaibal K.
Kim, Jin Young
Goldstein, David N.
Neale, Nathan R.
Zhu, Kai
Elliot, C. Michael
Frank, Arthur J.
George, Steven M.
TI In2S3 Atomic Layer Deposition and Its Application as a Sensitizer on
TiO2 Nanotube Arrays for Solar Energy Conversion
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID INDIUM SULFIDE; THIN-FILMS; SURFACE-CHEMISTRY; VAPOR-DEPOSITION;
IR-SPECTRA; CELLS; COMPLEXES; GROWTH; SPECTROSCOPY; TRANSPORT
AB In2S3 atomic layer deposition (ALD) with indium acetylacetonate (In(acac)(3)) and H2S was studied with quartz crystal microbalance (QCM), X-ray reflectivity (XRR), and Fourier transform infrared (FTIR) spectroscopy techniques. Subsequent In2S3 ALD on TiO2 nanotube arrays defined a model semiconductor sensitized solar cell. For In2S3 ALD on initial Al2O3 ALD surfaces, the In2S3 ALD displayed a nucleation period of similar to 60-70 cycles followed by a linear growth region. These results were obtained under ALD conditions that were not completely self-limiting for the In(acac)(3) exposure because of the low In(acac)3 vapor pressure. The growth per cycle decreased at higher temperature over the temperature range from 130 to 170 degrees C at these same reactant conditions. The growth per cycle was 0.30-0.35 angstrom per cycle at 150 degrees C as determined by QCM and XRR measurements at higher In(acac)(3) exposures where the surface reactions were self-limiting chemistry versus In(acac)(3) and H2S exposures. The FTIR examinations revealed that the nucleation period on Al2O3 ALD surfaces may be related to the formation of Al(acac)* species that act to poison the initial Al2O3 ALD surface. X-ray diffraction investigations revealed beta-In2S3 ALD films and X-ray photoelectron measurements were consistent with In2S3 films. The In2S3 ALD was employed as a semiconductor sensitizer on TiO2 nanotube arrays for solar conversion. Scanning electron microscopy and energy dispersive X-ray analysis imaging revealed In2S3 over the full length of the TiO2 nanotube array after 175 cycles of In2S3 ALD at 150 degrees C at reactant exposure conditions that were self-limiting on flat substrates. The photoelectrochemical properties of these In2S3 ALD-sensitized TiO2 nanotube arrays with a Co2+/Co3+ electrolyte were then characterized by measuring the photocurrent density versus voltage and the external quantum efficiency versus photon energy. A small quantum efficiency of similar to 10% was observed that can be attributed to charge recombination losses and charge injection/collection processes.
C1 [Sarkar, Shaibal K.; Goldstein, David N.; George, Steven M.] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA.
[Kim, Jin Young; Neale, Nathan R.; Zhu, Kai; Frank, Arthur J.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Elliot, C. Michael] Colorado State Univ, Dept Chem, Ft Collins, CO 80523 USA.
[George, Steven M.] Univ Colorado, Dept Chem & Biol Engn, Boulder, CO 80309 USA.
RP George, SM (reprint author), Univ Colorado, Dept Chem & Biochem, Campus Box 215, Boulder, CO 80309 USA.
EM steven.george@colorado.edu
RI Kim, Jin Young/B-7077-2012; George, Steven/O-2163-2013
OI Kim, Jin Young/0000-0001-7728-3182; George, Steven/0000-0003-0253-9184
FU University of Colorado-National Renewable Energy Laboratory (CU-NREL);
Division of Chemical Sciences, Geosciences and Biosciences, Office of
Basic Energy Sciences, U.S. Department of Energy [DE-AC36-080028308,
DE-FG0204ER15591]; Office of Utility Technologies, Division of
Photovoltaics
FX This research was funded by a seed grant from the University of
Colorado-National Renewable Energy Laboratory (CU-NREL) Energy
Initiative Program (S.K.S., S.M.G.). This work was also supported by the
Division of Chemical Sciences, Geosciences and Biosciences, Office of
Basic Energy Sciences, U.S. Department of Energy (A.J.F.), and the
Office of Utility Technologies, Division of Photovoltaics (J.Y.K.,
N.R.N., K.Z.), U.S. Department of Energy, under Contract No.
DE-AC36-080028308. Additional support was provided by the Division of
Chemical Sciences, Geosciences and Biosciences, Office of Basic Energy
Sciences, U.S. Department of Energy (DE-FG0204ER15591) (C.M.E.). The
authors thank Andrew S. Cavanagh for providing the XPS analysis. Some of
the equipment used in this research was provided by the Air Force Office
of Scientific Research.
NR 41
TC 63
Z9 64
U1 10
U2 82
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD MAY 6
PY 2010
VL 114
IS 17
BP 8032
EP 8039
DI 10.1021/jp9086943
PG 8
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 588FO
UT WOS:000277053600070
ER
PT J
AU Shaw, LL
Wan, XF
Hu, JZ
Kwak, JH
Yang, ZG
AF Shaw, Leon L.
Wan, Xuefei
Hu, Jian Zhi
Kwak, Ja Hun
Yang, Zhenguo
TI Solid-State Hydriding Mechanism in the LiBH4 + MgH2 System
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID HYDROGEN STORAGE PROPERTIES; H SYSTEM; LITHIUM BOROHYDRIDE; COMPLEX
HYDRIDES; LI; MG; DESTABILIZATION; RELEASE; CARBON; BORON
AB The LiBH4 + MgH2 system has great potential in reversible hydrogen storage for fuel cell vehicles. However, it has always been dehydrogenated and rehydrogenated in the liquid state until recently. The solid-state hydriding and dehydriding are necessary in order to achieve hydrogen uptake and release near ambient temperature. In this study, the solid-state hydriding mechanism of 2LiH + MgB2 mixtures has been investigated. It is found that the solid-state hydriding proceeds in two elementary steps. The first step is the ion exchange between the Mg2+ and Li+ ions in the MgB2 crystal to form an intermediate compound (Mg1-xLi2x)B-2. The second step is the continuous ion exchange and simultaneous hydrogenation of (Mg1-xLi2x)B-2 to form LiBH4 and MgH2. This finding is consistent with the observed diffusion-controlled hydriding kinetics.
C1 [Shaw, Leon L.; Wan, Xuefei] Univ Connecticut, Dept Chem Mat & Biomol Engn, Storrs, CT 06269 USA.
[Hu, Jian Zhi; Kwak, Ja Hun; Yang, Zhenguo] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Shaw, LL (reprint author), Univ Connecticut, Dept Chem Mat & Biomol Engn, Storrs, CT 06269 USA.
EM Leon.Shaw@uconn.edu
RI Hu, Jian Zhi/F-7126-2012; Wan, Xuefei/C-3342-2014; Kwak, Ja
Hun/J-4894-2014
FU U.S. Department of Energy (DOE) [DE-FC36-05GO15008]
FX The stimulating discussion with Dr. John Vajo at HRL Laboratories and
Dr. Sonjong Hwang at California Institute of Technology regarding the
assignment of 6Li peaks is greatly appreciated. The authors
are also grateful to Dr. John Vajo for the insightful information
regarding reaction 2. This research was sponsored by the U.S. Department
of Energy (DOE) under the contract number DE-FC36-05GO15008 with Dr. Ned
T. Stetson as the Technology Manager. The NMR experiments were performed
in the Environmental Molecular Sciences Laboratory, a national
scientific user facility sponsored by the DOE Office of Biological and
Environmental Research, and located at the Pacific Northwest National
Laboratory, USA.
NR 58
TC 34
Z9 34
U1 1
U2 26
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD MAY 6
PY 2010
VL 114
IS 17
BP 8089
EP 8098
DI 10.1021/jp1003837
PG 10
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 588FO
UT WOS:000277053600078
ER
PT J
AU Lee, SW
Chen, S
Suntivich, J
Sasaki, K
Adzic, RR
Shao-Horn, Y
AF Lee, Seung Woo
Chen, Shuo
Suntivich, Jin
Sasaki, Kotaro
Adzic, Radoslav R.
Shao-Horn, Yang
TI Role of Surface Steps of Pt Nanoparticles on the Electrochemical
Activity for Oxygen Reduction
SO JOURNAL OF PHYSICAL CHEMISTRY LETTERS
LA English
DT Article
ID PARTICLE-SIZE; PLATINUM NANOCRYSTALS; CO ELECTROOXIDATION; METHANOL
OXIDATION; CARBON-MONOXIDE; ACIDIC MEDIA; CATALYSTS; ELECTRODES;
KINETICS; ELECTROCATALYSTS
AB The design of highly active nanoscale catalysts for the oxygen reduction reaction (ORR) and oxidation of small molecules such as the methanol oxidation reaction (MOR) constitutes the grand scientific and technological challenge in fuel cells. Although increasing surface steps on Pt nanoparticles was shown recently to enhance the activity of electrochemical oxidation of carbon monoxide and methanol electro-oxidation little is known about the role of surface steps of nanoparticles on ORR activity. Here we report that the ORR activity of Pt nanoparticles of similar to 2 nm is not influenced by surface steps, in contrast to MOR activity. Further, CO annealing experiments and in-situ X-ray adsorption measurements clearly compare the role of surface step for ORR and MOR on pt nanoparticles. The findings provide new insights to design highly active catalysts for proton exchange membrane fuel cells and direct methanol fuel cells.
C1 [Chen, Shuo; Shao-Horn, Yang] MIT, Dept Mech Engn, Cambridge, MA 02139 USA.
[Lee, Seung Woo] MIT, Dept Chem Engn, Cambridge, MA 02139 USA.
[Suntivich, Jin; Shao-Horn, Yang] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA.
[Lee, Seung Woo; Chen, Shuo; Suntivich, Jin; Shao-Horn, Yang] MIT, Electrochem Energy Lab, Cambridge, MA 02139 USA.
[Sasaki, Kotaro; Adzic, Radoslav R.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RP Shao-Horn, Y (reprint author), MIT, Dept Mech Engn, Cambridge, MA 02139 USA.
EM shaohorn@mit.edu
RI Chen, Shuo/H-2491-2011; Lee, Seung Woo/B-5820-2013
OI Chen, Shuo/0000-0002-7145-1269; Lee, Seung Woo/0000-0002-2695-7105
FU DOE [DE-FG02-05ER15728]; National Science Foundation [DMR-0819762];
Samsung Foundation of Culture
FX This work is supported in part by the DOE Hydrogen Initiative program
under Award Number DE-FG02-05ER15728 and the MRSEC Program of the
National Science Foundation under Award Number DMR-0819762. The authors
would like to thank Dr. Naoaki Yabuuchi for fruitful discussion. The
authors would like to thanks Prof. Tadaoki Mitani and Prof. Yong-Tae Kim
for Pt/MWNT samples. S.W.L. acknowledges a Samsung Scholarship, Samsung
Foundation of Culture.
NR 30
TC 82
Z9 82
U1 4
U2 65
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1948-7185
J9 J PHYS CHEM LETT
JI J. Phys. Chem. Lett.
PD MAY 6
PY 2010
VL 1
IS 9
BP 1316
EP 1320
DI 10.1021/jz100241j
PG 5
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary; Physics, Atomic, Molecular & Chemical
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 593HI
UT WOS:000277443200005
ER
PT J
AU Katz, JE
Gilbert, B
Zhang, XY
Attenkofer, K
Falcone, RW
Waychunas, GA
AF Katz, Jordan E.
Gilbert, Benjamin
Zhang, Xiaoyi
Attenkofer, Klaus
Falcone, Roger W.
Waychunas, Glenn A.
TI Observation of Transient Iron(II) Formation in Dye-Sensitized Iron Oxide
Nanoparticles by Time-Resolved X-ray Spectroscopy
SO JOURNAL OF PHYSICAL CHEMISTRY LETTERS
LA English
DT Article
ID ELECTRON INJECTION; ABSORPTION SPECTROSCOPY; ULTRAFAST; DYNAMICS;
KINETICS; LIGHT; RECOMBINATION; DISSOLUTION; XANES
AB The reduction of ferric, iron in solid phase minerals leads to the mobilization of ferrous iron in the environment and is thus a crucial component of the global iron cycle. Despite the importance of this process, a mechanistic understanding of the structural and chemical changes that are caused by this electron transfer reaction is not established because the speed of the fundamental chemical steps renders them inaccessible to conventional study. Ultrafast time-resolved X-ray spectroscopy is a technique that can overcome this limitation and measure changes in oxidation state and structure occurring during chemical reactions that can be initiated by a fast laser pulse. We use this approach with similar to 100 ps resolution to monitor the speciation of Fe atoms in iron oxide nanoparticles following photoinduced electron transfer from a surface-bound photo-active dye molecule. These data represent the first direct real-time observation of the dynamics of ferrous ion formation and subsequent reoxidation in iron oxide.
C1 [Katz, Jordan E.; Gilbert, Benjamin; Waychunas, Glenn A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
[Katz, Jordan E.; Falcone, Roger W.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Zhang, Xiaoyi; Attenkofer, Klaus] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA.
RP Gilbert, B (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
EM bgilbert@lbl.gov; gawaychunas@lbl.gov
RI Gilbert, Benjamin/E-3182-2010; Katz, Jordan/J-5599-2016
OI Katz, Jordan/0000-0002-6242-2124
FU U.S. Department of Energy, Office of Science, and Office of Basic Energy
Sciences (DOE-BES) [DE-AC02-05CH11231, DE-AC02-06CH11357]
FX We thank Jill Banfield, Kevin Rosso, and the APS Sector 11 staff. This
work was supported by the U.S. Department of Energy, Office of Science,
and Office of Basic Energy Sciences (DOE-BES) under contract no.
DE-AC02-05CH11231. Use of the APS is supported by DOE-BES under contract
no. DE-AC02-06CH11357.
NR 19
TC 14
Z9 14
U1 0
U2 22
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1948-7185
J9 J PHYS CHEM LETT
JI J. Phys. Chem. Lett.
PD MAY 6
PY 2010
VL 1
IS 9
BP 1372
EP 1376
DI 10.1021/jz100296r
PG 5
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary; Physics, Atomic, Molecular & Chemical
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 593HI
UT WOS:000277443200016
ER
PT J
AU Wu, ZK
Jiang, DE
Lanni, E
Bier, ME
Jin, RC
AF Wu, Zhikun
Jiang, De-en
Lanni, Eric
Bier, Mark E.
Jin, Rongchao
TI Sequential Observation of AgnS4- (1 <= n <= 7) Gas Phase Clusters in
MS/MS and Prediction of Their Structures
SO JOURNAL OF PHYSICAL CHEMISTRY LETTERS
LA English
DT Article
ID TOTAL-ENERGY CALCULATIONS; METAL SULFIDE CLUSTERS; WAVE BASIS-SET;
MASS-SPECTROMETRY; SILVER; PSEUDOPOTENTIALS; OPTIMIZATION; SPECTROSCOPY;
NITROGENASE; TRANSITION
AB Recently we reported synthesis and characterization of a monodisperse thiolate-protected Ag-7 cluster. Here we show in detail that a unique series of silver sulfide cluster anions (AgnS4-) were observed sequentially form n = 7 to 1 when subjecting the thiolate-protected Ag-7 cluster to an MS/MS experiment. Random silver cluster anion distribution were not observed in a wide range of collision energies. This indicates the special structure and stability of these gas phase AgnS4- clusters. Global minimum search based on density functional theory-enabled basin hopping has yielded the most stable structures for AgnS4- (1 <= n <= 7). The global minima show a transition from three-dimensional to two-dimensional and then to one-dimensional geometry with decreasing n for AgnS4- clusters. This joint experimental and computational effort provides a pathway to discover and elucidate metal-sulfide cluster of unique stoichiometry, which are not accessible through conventional methods such as laser ablation of mixed metal and sulfur powders.
C1 [Jiang, De-en] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
[Wu, Zhikun; Lanni, Eric; Bier, Mark E.; Jin, Rongchao] Carnegie Mellon Univ, Dept Chem, Pittsburgh, PA 15213 USA.
RP Jiang, DE (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM jiangd@ornl.gov; mbier@andrew.cmu.edu; rongchao@andrew.cmu.edu
RI Jiang, De-en/D-9529-2011
OI Jiang, De-en/0000-0001-5167-0731
FU Division of Chemical Sciences, Geosciences, and Biosciences, Office of
Basic Energy sciences, U.S. Department of Energy; CMU; AFOSR; NIOSH;
Carnegie Mellon
FX The work at ORNL was supported by the Division of Chemical Sciences,
Geosciences, and Biosciences, Office of Basic Energy sciences, U.S.
Department of Energy. R.J. acknowledges the financial support from CMU,
AFOSR, and NIOSH. M.E.B acknowledges the financial support for the
Waters QTOF2 from Carnegie Mellon.
NR 35
TC 18
Z9 18
U1 2
U2 17
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1948-7185
J9 J PHYS CHEM LETT
JI J. Phys. Chem. Lett.
PD MAY 6
PY 2010
VL 1
IS 9
BP 1423
EP 1427
DI 10.1021/jz100317w
PG 5
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary; Physics, Atomic, Molecular & Chemical
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 593HI
UT WOS:000277443200026
ER
PT J
AU Shibano, Y
Imahori, H
Sreearunothai, P
Cook, AR
Miller, JR
AF Shibano, Yuki
Imahori, Hiroshi
Sreearunothai, Paiboon
Cook, Andrew R.
Miller, John R.
TI Conjugated "Molecular Wire" for Excitons
SO JOURNAL OF PHYSICAL CHEMISTRY LETTERS
LA English
DT Article
ID HIGHLY MOBILE ELECTRONS; ORGANIC QUANTUM-WIRE; ENERGY-TRANSFER;
BLOCK-COPOLYMERS; SOLAR-CELLS; POLYMERS; POLYFLUORENE; STATE;
SPECTROSCOPY; TEMPERATURE
AB We have synthesized new conjugated, rigid rod oligomers of fluorene, F-n(C-60)(2), n = 4, 8, 12, and 16. These pure compounds have F-n chains up to 140 angstrom long. The C-60 groups covalently attached at both ends serve as traps for excitons created in the F-n chains. Excitons created in the chains by photoexcitation reacted rapidly with the C-60 groups with decays described well by the sum of two exponentials. Mean reaction times were 2.3, 5.5, and 10.4 ps for n = 8, 12, and 16. In F-16(C-60)(2), the 10.4 ps reaction time was 40 times faster than that found in earlier reports on molecules of slightly longer length. The simplest possible model, that of one-dimensional diffusion of excitonic polarons that react whenever they encounter the end of a chain, fits the results to obtain diffusion coefficients. Derivations of those fits from the data may point to the need for alternative pictures or may just indicate that diffusion is not ideal. The definite lengths of these molecules enable a stringent test for theories. These results reveal that exciton transport can be much faster than previously believed, a finding that could, along with appropriate nanoassembly, enable new kinds of high-efficiency organic photovoltaics.
C1 [Sreearunothai, Paiboon; Cook, Andrew R.; Miller, John R.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
[Imahori, Hiroshi] Brookhaven Natl Lab, Inst Integrated Cell Mat Sci, Upton, NY 11973 USA.
[Shibano, Yuki; Imahori, Hiroshi] Kyoto Univ, Grad Sch Engn, Dept Mol Engn, Sakyo Ku, Kyoto 6068501, Japan.
RP Miller, JR (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
EM jrmiller@bnl.gov
RI Imahori, Hiroshi/B-5574-2013;
OI Imahori, Hiroshi/0000-0003-3506-5608; Cook, Andrew/0000-0001-6633-3447
FU WPI Initiative, MEXT, Japan; JSPS; Division of Chemical Sciences,
Geosciences, and Biosciences, Office of Basic Energy Sciences of the
U.S. Department of Energy [DE-AC02-98-CH10886]
FX This work was partially supported by WPI Initiative, MEXT, Japan. Y.S.
is grateful for a JSPS fellowship for young scientists. Work at
Brookhaven National Laboratory was funded by the Division of Chemical
Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences
of the U.S. Department of Energy through Grant DE-AC02-98-CH10886. We
thank Matt Sfeir for rechecks of the laser measurements and Anthony
Grimonti for assistance.
NR 42
TC 21
Z9 21
U1 0
U2 19
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1948-7185
J9 J PHYS CHEM LETT
JI J. Phys. Chem. Lett.
PD MAY 6
PY 2010
VL 1
IS 9
BP 1492
EP 1496
DI 10.1021/jz100380m
PG 5
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary; Physics, Atomic, Molecular & Chemical
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 593HI
UT WOS:000277443200039
ER
PT J
AU Greenwell, HC
Laurens, LML
Shields, RJ
Lovitt, RW
Flynn, KJ
AF Greenwell, H. C.
Laurens, L. M. L.
Shields, R. J.
Lovitt, R. W.
Flynn, K. J.
TI Placing microalgae on the biofuels priority list: a review of the
technological challenges
SO JOURNAL OF THE ROYAL SOCIETY INTERFACE
LA English
DT Review
DE microalgae; algae; biofuel; biorefinery; biodiesel; green diesel
ID HETEROGENEOUS CATALYTIC DEOXYGENATION; INTERNALLY RADIATING
PHOTOBIOREACTOR; ATOMIC-FORCE MICROSCOPY; FATTY-ACID COMPOSITION;
FRESH-WATER ALGAE; BIODIESEL PRODUCTION; TUBULAR PHOTOBIOREACTORS;
VEGETABLE-OILS; LIGHT TRANSFER; STEARIC-ACID
AB Microalgae provide various potential advantages for biofuel production when compared with 'traditional' crops. Specifically, large-scale microalgal culture need not compete for arable land, while in theory their productivity is greater. In consequence, there has been resurgence in interest and a proliferation of algae fuel projects. However, while on a theoretical basis, microalgae may produce between 10- and 100-fold more oil per acre, such capacities have not been validated on a commercial scale. We critically review current designs of algal culture facilities, including photobioreactors and open ponds, with regards to photosynthetic productivity and associated biomass and oil production and include an analysis of alternative approaches using models, balancing space needs, productivity and biomass concentrations, together with nutrient requirements. In the light of the current interest in synthetic genomics and genetic modifications, we also evaluate the options for potential metabolic engineering of the lipid biosynthesis pathways of microalgae. We conclude that although significant literature exists on microalgal growth and biochemistry, significantly more work needs to be undertaken to understand and potentially manipulate algal lipid metabolism. Furthermore, with regards to chemical upgrading of algal lipids and biomass, we describe alternative fuel synthesis routes, and discuss and evaluate the application of catalysts traditionally used for plant oils. Simulations that incorporate financial elements, along with fluid dynamics and algae growth models, are likely to be increasingly useful for predicting reactor design efficiency and life cycle analysis to determine the viability of the various options for large-swcale culture. The greatest potential for cost reduction and increased yields most probably lies within closed or hybrid closed-open production systems.
C1 [Greenwell, H. C.] Univ Durham, Dept Chem, Durham DH1 3LE, England.
[Laurens, L. M. L.] Natl Renewable Energy Lab, Natl Bioenergy Ctr, Golden, CO 80401 USA.
[Shields, R. J.; Flynn, K. J.] Univ Swansea, Ctr Sustainable Aquaculture Res, Swansea SA2 8PP, W Glam, Wales.
[Lovitt, R. W.] Univ Swansea, Sch Engn, Ctr Complex Fluids Proc, Swansea SA2 8PP, W Glam, Wales.
RP Greenwell, HC (reprint author), Univ Durham, Dept Chem, South Rd, Durham DH1 3LE, England.
EM chris.greenwell@durham.ac.uk
RI Laurens, Lieve/B-3545-2013; Greenwell, Chris/B-1561-2015;
OI Greenwell, Chris/0000-0001-5719-8415; Lovitt,
robert/0000-0002-5587-2776; Flynn, Kevin/0000-0001-6913-5884
NR 159
TC 310
Z9 321
U1 32
U2 309
PU ROYAL SOC
PI LONDON
PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND
SN 1742-5689
EI 1742-5662
J9 J R SOC INTERFACE
JI J. R. Soc. Interface
PD MAY 6
PY 2010
VL 7
IS 46
BP 703
EP 726
DI 10.1098/rsif.2009.0322
PG 24
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 573PY
UT WOS:000275927900001
PM 20031983
ER
PT J
AU Pepper, RE
Roper, M
Ryu, S
Matsudaira, P
Stone, HA
AF Pepper, Rachel E.
Roper, Marcus
Ryu, Sangjin
Matsudaira, Paul
Stone, Howard A.
TI Nearby boundaries create eddies near microscopic filter feeders
SO JOURNAL OF THE ROYAL SOCIETY INTERFACE
LA English
DT Article
DE biofluids; filter feeder; Vorticella; Brinkman; stokeslet; boundaries
ID NO-SLIP BOUNDARY; STENTOR-COERULEUS; VISCOUS-FLOW; FOOD; VORTICELLA;
FLUCTUATIONS; MECHANISMS; FILTRATION; STOKESLET; DRIVEN
AB We show through calculations, simulations and experiments that the eddies often observed near sessile filter feeders are frequently due to the presence of nearby boundaries. We model the common filter feeder Vorticella, which is approximately 50 mm across and which feeds by removing bacteria from ocean or pond water that it draws towards itself. We use both an analytical stokeslet model and a Brinkman flow approximation that exploits the narrow-gap geometry to predict the size of the eddy caused by two parallel no-slip boundaries that represent the slides between which experimental observations are often made. We also use three-dimensional finite-element simulations to fully solve for the flow around a model Vorticella and analyse the influence of multiple nearby boundaries. Additionally, we track particles around live feeding Vorticella in order to determine the experimental flow field. Our models are in good agreement both with each other and with experiments. We also provide approximate equations to predict the experimental eddy sizes owing to boundaries both for the case of a filter feeder between two slides and for the case of a filter feeder attached to a perpendicular surface between two slides.
C1 [Stone, Howard A.] Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA.
[Pepper, Rachel E.] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
[Roper, Marcus] Univ Calif Berkeley, Dept Math, Berkeley, CA 94720 USA.
[Roper, Marcus] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Ryu, Sangjin] MIT, Dept Mech Engn, Cambridge, MA 02139 USA.
[Matsudaira, Paul] Natl Univ Singapore, Dept Biol Sci, Singapore 117543, Singapore.
RP Stone, HA (reprint author), Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA.
EM hastone@princeton.edu
RI Matsudaira, Paul/H-1475-2012;
OI Matsudaira, Paul/0000-0002-8399-3276; Ryu, Sangjin/0000-0001-9142-3030
NR 38
TC 9
Z9 9
U1 1
U2 9
PU ROYAL SOC
PI LONDON
PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND
SN 1742-5689
J9 J R SOC INTERFACE
JI J. R. Soc. Interface
PD MAY 6
PY 2010
VL 7
IS 46
BP 851
EP 862
DI 10.1098/rsif.2009.0419
PG 12
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 573PY
UT WOS:000275927900012
PM 19942677
ER
PT J
AU Perfettini, H
Avouac, JP
Tavera, H
Kositsky, A
Nocquet, JM
Bondoux, F
Chlieh, M
Sladen, A
Audin, L
Farber, DL
Soler, P
AF Perfettini, Hugo
Avouac, Jean-Philippe
Tavera, Hernando
Kositsky, Andrew
Nocquet, Jean-Mathieu
Bondoux, Francis
Chlieh, Mohamed
Sladen, Anthony
Audin, Laurence
Farber, Daniel L.
Soler, Pierre
TI Seismic and aseismic slip on the Central Peru megathrust
SO NATURE
LA English
DT Article
ID STRAIN ACCUMULATION; SUBDUCTION ZONE; EARTHQUAKE; DEFORMATION; LOCKING;
JAPAN; GPS
AB Slip on a subduction megathrust can be seismic or aseismic, with the two modes of slip complementing each other in time and space to accommodate the long-term plate motions. Although slip is almost purely aseismic at depths greater than about 40 km, heterogeneous surface strain(1-8) suggests that both modes of slip occur at shallower depths, with aseismic slip resulting from steady or transient creep in the interseismic and postseismic periods(9-11). Thus, active faults seem to comprise areas that slip mostly during earthquakes, and areas that mostly slip aseismically. The size, location and frequency of earthquakes that a megathrust can generate thus depend on where and when aseismic creep is taking place, and what fraction of the long-term slip rate it accounts for. Here we address this issue by focusing on the central Peru megathrust. We show that the Pisco earthquake, with moment magnitude M-w = 8.0, ruptured two asperities within a patch that had remained locked in the interseismic period, and triggered aseismic frictional afterslip on two adjacent patches. The most prominent patch of afterslip coincides with the subducting Nazca ridge, an area also characterized by low interseismic coupling, which seems to have repeatedly acted as a barrier to seismic rupture propagation in the past. The seismogenic portion of the megathrust thus appears to be composed of interfingering rate-weakening and rate-strengthening patches. The rate-strengthening patches contribute to a high proportion of aseismic slip, and determine the extent and frequency of large interplate earthquakes. Aseismic slip accounts for as much as 50-70% of the slip budget on the seismogenic portion of the megathrust in central Peru, and the return period of earthquakes with M-w = 8.0 in the Pisco area is estimated to be 250 years.
C1 [Perfettini, Hugo; Bondoux, Francis; Chlieh, Mohamed; Audin, Laurence; Soler, Pierre] Inst Rech Dev, F-13572 Marseille 02, France.
[Perfettini, Hugo; Tavera, Hernando; Bondoux, Francis; Audin, Laurence] Inst Geofis Peru, Lima, Peru.
[Avouac, Jean-Philippe; Kositsky, Andrew; Sladen, Anthony] CALTECH, Div Geol & Planetary Sci, Tecton Observ, Pasadena, CA 91125 USA.
[Nocquet, Jean-Mathieu; Chlieh, Mohamed] GeoAzur, F-06560 Valbonne, France.
[Farber, Daniel L.] Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA.
[Perfettini, Hugo; Bondoux, Francis] Univ Grenoble 1, CNRS, Observ Sci, Lab Geophys Interne & Tectonophys,LCPC,IRD, F-38041 Grenoble 9, France.
[Perfettini, Hugo; Audin, Laurence] Univ Toulouse 3, CNRS, Observ Midi Pyrenees, Lab Mecanismes Transfert Geol,IRD, F-31400 Toulouse, France.
[Farber, Daniel L.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Kositsky, Andrew] Ashima Res, Pasadena, CA 91106 USA.
RP Perfettini, H (reprint author), Inst Rech Dev, 44 Blvd Dunkerque, F-13572 Marseille 02, France.
EM hugo.perfettini@ird.fr
RI Farber, Daniel/F-9237-2011; Tavera, Hernando/I-5487-2013; Avouac,
Jean-Philippe/B-5699-2015; laurence, audin/D-7727-2013; Sladen,
Anthony/A-2532-2017
OI Avouac, Jean-Philippe/0000-0002-3060-8442; laurence,
audin/0000-0002-4510-479X; Sladen, Anthony/0000-0003-4126-0020
FU Institute de Recherche pour le Developpement; Gordon and Betty Moore
Foundation; National Science Foundation [EAR-0838495]
FX We thank J. Freymueller and R. Burgmann for reviews that have helped
improve this manuscript. We are grateful to A. Copley for help in
editing the manuscript. This study has benefited from support from the
Institute de Recherche pour le Developpement, the Gordon and Betty Moore
Foundation through the Tectonics Observatory, and the National Science
Foundation through grant EAR-0838495.
NR 29
TC 96
Z9 99
U1 6
U2 32
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
EI 1476-4687
J9 NATURE
JI Nature
PD MAY 6
PY 2010
VL 465
IS 7294
BP 78
EP 81
DI 10.1038/nature09062
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 591OW
UT WOS:000277311900034
PM 20445628
ER
PT J
AU Arenas, A
Borge-Holthoefer, J
Gomez, S
Zamora-Lopez, G
AF Arenas, A.
Borge-Holthoefer, J.
Gomez, S.
Zamora-Lopez, G.
TI Optimal map of the modular structure of complex networks
SO NEW JOURNAL OF PHYSICS
LA English
DT Article
ID COMMUNITY STRUCTURE; VALUE DECOMPOSITION; SYNCHRONIZATION
AB The modular structure is pervasive in many complex networks of interactions observed in natural, social and technological sciences. Its study sheds light on the relation between the structure and the function of complex systems. Generally speaking, modules are islands of highly connected nodes separated by a relatively small number of links. Every module can have the contributions of links from any node in the network. The challenge is to disentangle these contributions to understand how the modular structure is built. The main problem is that the analysis of a certain partition into modules involves, in principle, as much data as the number of modules times the number of nodes. To confront this challenge, here we first define the contribution matrix, the mathematical object containing all the information about the partition of interest, and then we use truncated singular value decomposition to extract the best representation of this matrix in a plane. The analysis of this projection allows us to scrutinize the skeleton of the modular structure, revealing the structure of individual modules and their interrelations.
C1 [Arenas, A.; Borge-Holthoefer, J.; Gomez, S.] Univ Rovira & Virgili, Dept Engn Informat & Matemat, Tarragona 43007, Spain.
[Arenas, A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Zamora-Lopez, G.] Univ Potsdam, Interdisciplinary Ctr Dynam Complex Syst, D-14415 Potsdam, Germany.
RP Arenas, A (reprint author), Univ Rovira & Virgili, Dept Engn Informat & Matemat, Tarragona 43007, Spain.
EM alexandre.arenas@urv.cat; javier.borge@urv.cat; sergio.gomez@urv.cat;
gorka_agnld@yahoo.es
RI Gomez, Sergio/B-2113-2010; Borge-Holthoefer, Javier/J-9187-2013;
Zamora-Lopez, Gorka/A-2648-2012; Arenas, Alex/A-5216-2009
OI Gomez, Sergio/0000-0003-1820-0062; Borge-Holthoefer,
Javier/0000-0001-9036-8463; Zamora-Lopez, Gorka/0000-0001-9361-9619;
Arenas, Alex/0000-0003-0937-0334
NR 23
TC 21
Z9 22
U1 0
U2 9
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1367-2630
J9 NEW J PHYS
JI New J. Phys.
PD MAY 6
PY 2010
VL 12
AR 053009
DI 10.1088/1367-2630/12/5/053009
PG 18
WC Physics, Multidisciplinary
SC Physics
GA 592DN
UT WOS:000277355700003
ER
PT J
AU Pfister, CA
Meyer, F
Antonopoulos, DA
AF Pfister, Catherine A.
Meyer, Folker
Antonopoulos, Dionysios A.
TI Metagenomic Profiling of a Microbial Assemblage Associated with the
California Mussel: A Node in Networks of Carbon and Nitrogen Cycling
SO PLOS ONE
LA English
DT Article
ID PACIFIC-OCEAN; PERNA-PERNA; DIVERSITY; COASTAL; ECOLOGY; PHYTOPLANKTON;
INVERTEBRATES; REGENERATION; COMPETITION; BIOSPHERE
AB Mussels are conspicuous and often abundant members of rocky shores and may constitute an important site for the nitrogen cycle due to their feeding and excretion activities. We used shotgun metagenomics of the microbial community associated with the surface of mussels (Mytilus californianus) on Tatoosh Island in Washington state to test whether there is a nitrogen-based microbial assemblage associated with mussels. Analyses of both tidepool mussels and those on emergent benches revealed a diverse community of Bacteria and Archaea with approximately 31 million bp from 6 mussels in each habitat. Using MG-RAST, between 22.5-25.6% were identifiable using the SEED non-redundant database for proteins. Of those fragments that were identifiable through MG-RAST, the composition was dominated by Cyanobacteria and Alpha and Gamma-proteobacteria. Microbial composition was highly similar between the tidepool and emergent bench mussels, suggesting similar functions across these different microhabitats. One percent of the proteins identified in each sample were related to nitrogen cycling. When normalized to protein discovery rate, the high diversity and abundance of enzymes related to the nitrogen cycle in mussel-associated microbes is as great or greater than that described for other marine metagenomes. In some instances, the nitrogen-utilizing profile of this assemblage was more concordant with soil metagenomes in the Midwestern U. S. than for open ocean system. Carbon fixation and Calvin cycle enzymes further represented 0.65 and 1.26% of all proteins and their abundance was comparable to a number of open ocean marine metagenomes. In sum, the diversity and abundance of nitrogen and carbon cycle related enzymes in the microbes occupying the shells of Mytilus californianus suggest these mussels provide a node for microbial populations and thus biogeochemical processes.
C1 [Pfister, Catherine A.] Univ Chicago, Dept Ecol & Evolut, Chicago, IL 60637 USA.
[Meyer, Folker] Univ Chicago, Computat Inst, Chicago, IL 60637 USA.
[Meyer, Folker; Antonopoulos, Dionysios A.] Argonne Natl Lab, Inst Genom & Syst Biol, Argonne, IL 60439 USA.
[Antonopoulos, Dionysios A.] Univ Chicago, Dept Med, Chicago, IL 60637 USA.
RP Pfister, CA (reprint author), Univ Chicago, Dept Ecol & Evolut, 940 E 57Th St, Chicago, IL 60637 USA.
EM cpfister@uchicago.edu
OI Meyer, Folker/0000-0003-1112-2284
FU National Science Foundation [OCE-0928232]; Argonne National Labs
FX Funding was provided by National Science Foundation OCE-0928232 to CAP
and Argonne National Labs. The funders had no role in study design, data
collection and analysis, decision to publish, or preparation of the
manuscript.
NR 51
TC 17
Z9 18
U1 5
U2 37
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD MAY 6
PY 2010
VL 5
IS 5
AR e10518
DI 10.1371/journal.pone.0010518
PG 10
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 592LG
UT WOS:000277379800012
PM 20463896
ER
PT J
AU Bazavov, A
Toussaint, D
Bernard, C
Laiho, J
DeTar, C
Levkova, L
Oktay, MB
Gottlieb, S
Heller, UM
Hetrick, JE
Mackenzie, PB
Sugar, R
Van de Water, RS
AF Bazavov, A.
Toussaint, D.
Bernard, C.
Laiho, J.
DeTar, C.
Levkova, L.
Oktay, M. B.
Gottlieb, Steven
Heller, U. M.
Hetrick, J. E.
Mackenzie, P. B.
Sugar, R.
Van de Water, R. S.
TI Nonperturbative QCD simulations with 2+1 flavors of improved staggered
quarks
SO REVIEWS OF MODERN PHYSICS
LA English
DT Article
ID LATTICE GAUGE-THEORIES; CHIRAL PERTURBATION-THEORY; HYBRID MONTE-CARLO;
STRONG-COUPLING CALCULATIONS; DYNAMICAL SYMMETRY-BREAKING;
DYSON-SCHWINGER EQUATIONS; OVERLAP DIRAC OPERATOR; KOGUT-SUSSKIND
QUARKS; QUANTUM CHROMODYNAMICS; MOLECULAR-DYNAMICS
AB Dramatic progress has been made over the last decade in the numerical study of quantum chromodynamics (QCD) through the use of improved formulations of QCD on the lattice (improved actions), the development of new algorithms, and the rapid increase in computing power available to lattice gauge theorists. In this article simulations of full QCD are described using the improved staggered quark formalism, "asqtad" fermions. These simulations were carried out with two degenerate flavors of light quarks (up and down) and with one heavier flavor, the strange quark. Several light quark masses, down to about three times the physical light quark mass, and six lattice spacings have been used. These enable controlled continuum and chiral extrapolations of many low energy QCD observables. The improved staggered formalism is reviewed, emphasizing both advantages and drawbacks. In particular, the procedure for removing unwanted staggered species in the continuum limit is reviewed. Then the asqtad lattice ensembles created by the MILC Collaboration are described. All MILC lattice ensembles are publicly available, and they have been used extensively by a number of lattice gauge theory groups. The physics results obtained with them are reviewed, and the impact of these results on phenomenology is discussed. Topics include the heavy quark potential, spectrum of light hadrons, quark masses, decay constants of light and heavy-light pseudoscalar mesons, semileptonic form factors, nucleon structure, scattering lengths, and more.
C1 [Bazavov, A.; Toussaint, D.] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA.
[Bernard, C.; Laiho, J.] Washington Univ, Dept Phys, St Louis, MO 63130 USA.
[DeTar, C.; Levkova, L.; Oktay, M. B.] Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA.
[Gottlieb, Steven] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA.
[Heller, U. M.] Amer Phys Soc, Ridge, NY 11961 USA.
[Hetrick, J. E.] Univ Pacific, Dept Phys, Stockton, CA 95211 USA.
[Mackenzie, P. B.] Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA.
[Sugar, R.] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA.
[Van de Water, R. S.] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Bazavov, A (reprint author), Univ Arizona, Dept Phys, Tucson, AZ 85721 USA.
OI Hetrick, James/0000-0002-0740-2251; Heller, Urs M./0000-0002-2780-5584
FU United States Department of Energy [DE-FG02-91ER-40628,
DE-FG02-91ER-40661, DE-FG02-04ER-41298, DE-FC02-06ER-41443,
DE-FC-06ER-41446, DE-AC-02-98CH10886]; National Science Foundation
[PHY05-55234, PHY05-55235, PHY05-55243, PHY05-55397, PHY07-03296,
PHY07-04171, PHY07-57035, PHY07-57333]; Office of Science of the United
States Department of Energy, at the Argonne Leadership Class Computing
Facility; USQCD Collaboration; National Energy Research Scientific
Computing Center, at Los Alamos National Lab, and at the University of
Arizona; CHPC at the University of Utah; Indiana University; University
of California, Santa Barbara
FX We thank Maarten Golterman for careful reading of this manuscript and
helpful suggestions. We are also grateful to Yigal Shamir for suggested
clarifications to Sec. III. C. We thank Heechang Na for help with the
heavy baryon section and Subhasish Basak for help with the section on
electromagnetic effects. This work was supported in part by the United
States Department of Energy under Grants No. DE-FG02-91ER-40628, No.
DE-FG02-91ER-40661, No. DE-FG02-04ER-41298, No. DE-FC02-06ER-41443, No.
DE-FC-06ER-41446, and No. DE-AC-02-98CH10886, and by the National
Science Foundation under Grants No. PHY05-55234, No. PHY05-55235, No.
PHY05-55243, No. PHY05-55397, No. PHY07-03296, No. PHY07-04171, No.
PHY07-57035, and No. PHY07-57333. Fermilab is operated by Fermi Research
Alliance, LLC, under Contract No. DE-AC02-07CH11359 with the United
States Department of Energy. Computations for this work were carried out
in part on facilities of the NSF Teragrid under allocation TG-MCA93S002,
facilities of the USQCD Collaboration, which are funded by the Office of
Science of the United States Department of Energy, at the Argonne
Leadership Class Computing Facility under an Incite grant to the USQCD
Collaboration, at the National Energy Research Scientific Computing
Center, at Los Alamos National Lab, and at the University of Arizona,
the CHPC at the University of Utah, Indiana University, and the
University of California, Santa Barbara.
NR 389
TC 179
Z9 179
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0034-6861
EI 1539-0756
J9 REV MOD PHYS
JI Rev. Mod. Phys.
PD MAY 6
PY 2010
VL 82
IS 2
BP 1349
EP 1417
DI 10.1103/RevModPhys.82.1349
PG 69
WC Physics, Multidisciplinary
SC Physics
GA 603SN
UT WOS:000278228500001
ER
PT J
AU Ma, R
Zheng, C
Prommer, H
Greskowiak, J
Liu, C
Zachara, J
Rockhold, M
AF Ma, R.
Zheng, C.
Prommer, H.
Greskowiak, J.
Liu, C.
Zachara, J.
Rockhold, M.
TI A field-scale reactive transport model for U(VI) migration influenced by
coupled multirate mass transfer and surface complexation reactions
SO WATER RESOURCES RESEARCH
LA English
DT Article
ID URANIUM(VI) ADSORPTION; NATURAL ATTENUATION; SEDIMENTS; SORPTION; SITE;
FERRIHYDRITE; DESORPTION; SPECIATION; KINETICS; AQUIFER
AB This study explores field-scale modeling of U(VI) reactive transport through incorporation of laboratory and field data. A field-scale reactive transport model was developed on the basis of laboratory-characterized U(VI) surface complexation reactions (SCRs) and multirate mass transfer processes, as well as field-measured hydrogeochemical conditions at the U. S. Department of Energy, Hanford 300 Area (300 A), Washington. The model was used to assess the importance of multirate mass transfer processes on U(VI) reactive transport and to evaluate the effect of variable geochemical conditions caused by dynamic river water-groundwater interactions on U(VI) plume migration. Model simulations revealed complex spatiotemporal relationships between groundwater composition and U(VI) speciation, adsorption, and plume migration. In general, river water intrusion enhances uranium adsorption and lowers aqueous uranium concentration because river water dilution increases pH and decreases aqueous bicarbonate concentration, leading to overall enhanced U(VI) surface complexation. Strong U(VI) retardation was computed for the field-measured hydrogeochemical conditions, suggesting a slow dissipation of the U(VI) plume, a phenomenon consistent with field observations. The simulations also showed that SCR-retarded U(VI) migration becomes more dynamic and synchronous with the groundwater flow field when multirate mass transfer processes are involved. Breakthrough curves at selected locations and the temporal changes in the calculated mass during the 20 year simulation period indicated that uranium adsorption/desorption never attained steady state because of the dynamic flow field and groundwater composition variations caused by river water intrusion. Thus, the multirate SCR model appears to be a crucial consideration for future reactive transport simulations of uranium contaminants at the Hanford 300 A site and elsewhere under similar hydrogeochemical conditions.
C1 [Ma, R.; Zheng, C.] Univ Alabama, Dept Geol Sci, Tuscaloosa, AL 35487 USA.
[Prommer, H.; Greskowiak, J.] CSIRO Land & Water, Floreat, Australia.
[Prommer, H.] Univ Western Australia, Sch Earth & Environm, Crawley, WA, Australia.
[Liu, C.; Zachara, J.; Rockhold, M.] Pacific NW Natl Lab, Richland, WA 99354 USA.
RP Ma, R (reprint author), Univ Alabama, Dept Geol Sci, Tuscaloosa, AL 35487 USA.
EM czheng@ua.edu
RI Liu, Chongxuan/C-5580-2009; Prommer, Henning/A-4555-2008; Zheng,
Chunmiao/I-5257-2014; Greskowiak, Janek/F-4198-2012
OI Prommer, Henning/0000-0002-8669-8184; Zheng,
Chunmiao/0000-0001-5839-1305;
FU U.S. Department of Energy (DOE); CSIRO OCE; Australian Resources
Research Centre (ARRC)
FX This research was supported by Integrated Field-Scale Subsurface
Research Challenge (IFRC) Project of the U.S. Department of Energy (DOE)
and a CSIRO OCE postdoctoral fellowship for J.G. The work was also
supported by iVEC through the use of advanced high-performance computing
resources provided by the Australian Resources Research Centre (ARRC).
The authors are grateful to Gordon Bennett, whose review and editing has
significantly improved the presentation of this manuscript. We also
thank Schlumberger Water Services for GUI software support.
NR 52
TC 37
Z9 38
U1 3
U2 40
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0043-1397
J9 WATER RESOUR RES
JI Water Resour. Res.
PD MAY 6
PY 2010
VL 46
AR W05509
DI 10.1029/2009WR008168
PG 17
WC Environmental Sciences; Limnology; Water Resources
SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water
Resources
GA 636OI
UT WOS:000280746800002
ER
PT J
AU Mao, X
Ding, B
Wang, MR
Yin, YB
AF Mao, Xue
Ding, Bin
Wang, Moran
Yin, Yanbing
TI Self-assembly of phthalocyanine and polyacrylic acid composite
multilayers on cellulose nanofibers
SO CARBOHYDRATE POLYMERS
LA English
DT Article
DE Nanocomposites; Layered structure; Electrospinning
ID ZINC-PHTHALOCYANINE; ELECTROSPUN NANOFIBRES; HYBRID JUNCTIONS; MEMORY
DEVICES; FILMS; DERIVATIVES; POLYELECTROLYTES; POLYOXOMETALATE;
FABRICATION; PARTICLES
AB In this study, a novel nanocomposite multilayers was deposited on the electrospun nanofibrous mats by an electrostatic layer-by-layer (LBL) self-assembly technique. The positively charged water-insoluble 2,9,16,23-tetraaminophthalocyanine copper (CuTaPc) and the negatively charged water-soluble poly(acrylic acid) (PAA) were alternately deposited on the surface of negatively charged nanofibrous cellulose mats. The cationic CuTaPc was synthesized and characterized by UV-Vis and Fourier transform infrared (FT-IR) spectroscopy. The template nanofibrous cellulose mats were obtained from the alkaline hydrolysis of electrospun nanofibrous cellulose acetate mats. The resultant nanofibrous mats were characterized by scanning electron microscopy (SEM) and FT-IR spectroscopy. The SEM images showed that the composite LBL structured films were homogeneously deposited on the surface of the nanofibers. The diameters of nanofibers increased with the number of deposition bilayers. The average thickness of each CuTaPc/PAA bilayer is about 10 nm. Additionally, the FT-IR spectra results also indicated that the CuTaPc and PM were coated on the nanofibrous cellulose mats. (C) 2010 Elsevier Ltd. All rights reserved.
C1 [Mao, Xue; Ding, Bin] Donghua Univ, Key Lab Text Sci & Technol, Minist Educ, Shanghai 201620, Peoples R China.
[Mao, Xue; Ding, Bin] Donghua Univ, Nanomat Res Ctr, Modern Text Inst, Shanghai 200051, Peoples R China.
[Wang, Moran] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
[Wang, Moran] Los Alamos Natl Lab, CNLS, Los Alamos, NM 87545 USA.
[Mao, Xue; Yin, Yanbing] Qiqihar Univ, Coll Chem & Chem Engn, Qiqihar 161006, Peoples R China.
RP Ding, B (reprint author), Donghua Univ, Key Lab Text Sci & Technol, Minist Educ, Shanghai 201620, Peoples R China.
EM binding@dhu.edu.cn
RI Wang, Moran/A-1150-2010
FU National Natural Science Foundation of China [50803009]; Programme of
Introducing Talents of Discipline to Universities [111-2-04, B07024]
FX This work was partly supported by the National Natural Science
Foundation of China under Grant No. 50803009. Partial support from the
Programme of Introducing Talents of Discipline to Universities (Nos.
111-2-04 and B07024) was appreciated.
NR 30
TC 16
Z9 17
U1 8
U2 53
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0144-8617
J9 CARBOHYD POLYM
JI Carbohydr. Polym.
PD MAY 5
PY 2010
VL 80
IS 3
BP 839
EP 844
DI 10.1016/j.carbpol.2009.12.041
PG 6
WC Chemistry, Applied; Chemistry, Organic; Polymer Science
SC Chemistry; Polymer Science
GA 587JM
UT WOS:000276987800030
ER
PT J
AU Fine, A
Dentinger, C
Johnson, TF
Kossowski, A
Steiner-Sichel, L
Schwarz, AG
Hartman, LK
Honein, MA
Jamieson, D
Uyeki, T
Al-Samarrai, T
Creanga, AA
Graitcer, SB
AF Fine, A.
Dentinger, C.
Johnson, T. F.
Kossowski, A.
Steiner-Sichel, L.
Schwarz, A. G.
Hartman, L. K.
Honein, M. A.
Jamieson, D.
Uyeki, T.
Al-Samarrai, T.
Creanga, A. A.
Graitcer, S. B.
TI 2009 Pandemic Influenza A (H1N1) in Pregnant Women Requiring Intensive
Care-New York City, 2009 (Reprinted from MMWR, vol 59, pg 321-326, 2010)
SO JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION
LA English
DT Reprint
C1 [Fine, A.; Dentinger, C.; Johnson, T. F.; Kossowski, A.; Steiner-Sichel, L.; Schwarz, A. G.] New York City Dept Hlth & Mental Hyg, New York, NY USA.
[Hartman, L. K.] Oak Ridge Inst Sci & Educ, Oak Ridge, TN USA.
[Al-Samarrai, T.; Creanga, A. A.; Graitcer, S. B.] CDC, Atlanta, GA 30333 USA.
RP Fine, A (reprint author), New York City Dept Hlth & Mental Hyg, New York, NY USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU AMER MEDICAL ASSOC
PI CHICAGO
PA 515 N STATE ST, CHICAGO, IL 60654-0946 USA
SN 0098-7484
J9 JAMA-J AM MED ASSOC
JI JAMA-J. Am. Med. Assoc.
PD MAY 5
PY 2010
VL 303
IS 17
BP 1688
EP 1690
PG 3
WC Medicine, General & Internal
SC General & Internal Medicine
GA 591CR
UT WOS:000277276600009
ER
PT J
AU Jin, L
Brown, NJ
Harley, RA
Bao, JW
Michelson, SA
Wilczak, JM
AF Jin, Ling
Brown, Nancy J.
Harley, Robert A.
Bao, Jian-Wen
Michelson, Sara A.
Wilczak, James M.
TI Seasonal versus episodic performance evaluation for an Eulerian
photochemical air quality model
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID EASTERN UNITED-STATES; TROPOSPHERIC OZONE; CMAQ MODEL; COMMUNITIES;
MORTALITY; EMISSIONS; TRANSPORT; EXPOSURE; SYSTEM; IMPACT
AB This study presents detailed evaluation of the seasonal and episodic performance of the Community Multiscale Air Quality (CMAQ) modeling system applied to simulate air quality at a fine grid spacing (4 km horizontal resolution) in central California, where ozone air pollution problems are severe. A rich aerometric database collected during the summer 2000 Central California Ozone Study (CCOS) is used to prepare model inputs and to evaluate meteorological simulations and chemical outputs. We examine both temporal and spatial behaviors of ozone predictions. We highlight synoptically driven high-ozone events (exemplified by the four intensive operating periods (IOPs)) for evaluating both meteorological inputs and chemical outputs (ozone and its precursors) and compare them to the summer average. For most of the summer days, cross-domain normalized gross errors are less than 25% for modeled hourly ozone, and normalized biases are between +/- 15% for both hourly and peak (1 h and 8 h) ozone. The domain-wide aggregated metrics indicate similar performance between the IOPs and the whole summer with respect to predicted ozone and its precursors. Episode-to-episode differences in ozone predictions are more pronounced at a subregional level. The model performs consistently better in the San Joaquin Valley than other air basins, and episodic ozone predictions there are similar to the summer average. Poorer model performance (normalized peak ozone biases <-15% or >15%) is found in the Sacramento Valley and the Bay Area and is most noticeable in episodes that are subject to the largest uncertainties in meteorological fields (wind directions in the Sacramento Valley and timing and strength of onshore flow in the Bay Area) within the boundary layer.
C1 [Jin, Ling; Brown, Nancy J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Atmospher Sci, Berkeley, CA 94720 USA.
[Harley, Robert A.] Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720 USA.
[Bao, Jian-Wen; Michelson, Sara A.; Wilczak, James M.] NOAA, Reg Weather & Climate Applicat Div, Boulder, CO 80305 USA.
RP Jin, L (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Atmospher Sci, Berkeley, CA 94720 USA.
EM njbrown@lbl.gov
RI Harley, Robert/C-9177-2016
OI Harley, Robert/0000-0002-0559-1917
FU Central California Air Quality Study Agency; California Energy
Commission; Assistant Secretary of Fossil Energy; Office of Natural Gas
and Petroleum Technology through the National Petroleum Technology
Office under the U.S. Department of Energy [DE-AC02-05CH11231]
FX The authors would like to thank Cheryl Taylor, Klaus Scott, Neva Lowery,
Bruce Jackson, and Ajith Kaduwela of the California Air Resources Board.
Shaheen Tonse, Xiaoling Mao, and Claire Agnoux provided valuable
assistance in data processing and model diagnostics. We thank the
Technical Committee overseeing the Central California Ozone Study for
helpful comments at many stages of this research. This research was
supported by the Central California Air Quality Study Agency, California
Energy Commission, Assistant Secretary of Fossil Energy, Office of
Natural Gas and Petroleum Technology through the National Petroleum
Technology Office under the U.S. Department of Energy contract
DE-AC02-05CH11231. The statements and conclusions in this paper are
those of the authors and do not necessarily reflect the views of the
sponsoring agencies.
NR 43
TC 9
Z9 9
U1 0
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD MAY 5
PY 2010
VL 115
AR D09302
DI 10.1029/2009JD012680
PG 16
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 593RR
UT WOS:000277478400002
ER
PT J
AU Wu, YX
Hubbard, S
Williams, KH
Ajo-Franklin, J
AF Wu, Yuxin
Hubbard, Susan
Williams, Kenneth Hurst
Ajo-Franklin, Jonathan
TI On the complex conductivity signatures of calcite precipitation
SO JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
LA English
DT Article
ID ZERO-VALENT IRON; FREQUENCY ELECTRICAL-PROPERTIES; DOMAIN-INDUCED
POLARIZATION; COLE-COLE PARAMETERS; BIOGEOCHEMICAL TRANSFORMATIONS;
TIME-DOMAIN; BIOREMEDIATION; COLUMNS; PERFORMANCE; METAL
AB Calcite is a mineral phase that frequently precipitates during subsurface remediation or geotechnical engineering processes. This precipitation can lead to changes in the overall behavior of the system, such as flow alternation and soil strengthening. Because induced calcite precipitation is typically quite variable in space and time, monitoring its distribution in the subsurface is a challenge. In this research, we conducted a laboratory column experiment to investigate the potential of complex conductivity as a mean to remotely monitor calcite precipitation. Calcite precipitation was induced in a glass bead (3 mm) packed column through abiotic mixing of CaCl(2) and Na(2)CO(3) solutions. The experiment continued for 12 days with a constant precipitation rate of similar to 0.6 milimole/d. Visual observations and scanning electron microscopy imaging revealed two distinct phases of precipitation: an earlier phase dominated by well distributed, discrete precipitates and a later phase characterized by localized precipitate aggregation and associated pore clogging. Complex conductivity measurements exhibited polarization signals that were characteristic of both phases of calcite precipitation, with the precipitation volume and crystal size controlling the overall polarization magnitude and relaxation time constant. We attribute the observed responses to polarization at the electrical double layer surrounding calcite crystals. Our experiment illustrates the potential of electrical methods for characterizing the distribution and aggregation state of nonconductive minerals like calcite. Advancing our ability to quantify geochemical transformations using such noninvasive methods is expected to facilitate our understanding of complex processes associated with natural subsurface systems as well as processes induced through engineered treatments (such as environmental remediation and carbon sequestration).
C1 [Wu, Yuxin; Hubbard, Susan; Williams, Kenneth Hurst; Ajo-Franklin, Jonathan] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Wu, YX (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, MS 90-1116,1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM ywu3@lbl.gov
RI Wu, Yuxin/G-1630-2012; Hubbard, Susan/E-9508-2010; Williams,
Kenneth/O-5181-2014; Ajo-Franklin, Jonathan/G-7169-2015
OI Wu, Yuxin/0000-0002-6953-0179; Williams, Kenneth/0000-0002-3568-1155;
FU U. S. Department of Energy [DE-AC0205CH11231]
FX Funding for this study was provided by the U. S. Department of Energy,
Biological and Environmental Research Program contract DE-AC0205CH11231
to the project entitled "Field Investigations of Microbially Facilitated
Calcite Precipitation for Immobilization of Strontium-90 and Other Trace
Metals in the Subsurface" (PI: Robert Smith, University of Idaho) and to
the LBNL Sustainable Systems Scientific Focus Area. We thank Joern
Larsen and Kathryn Flynn (both at LBNL) for conducting calcium and
alkalinity analysis. We thank Xavier Comas (Florida Atlantic University)
and an anonymous reviewer for providing useful comments.
NR 51
TC 10
Z9 10
U1 2
U2 15
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-BIOGEO
JI J. Geophys. Res.-Biogeosci.
PD MAY 5
PY 2010
VL 115
AR G00G04
DI 10.1029/2009JG001129
PG 10
WC Environmental Sciences; Geosciences, Multidisciplinary
SC Environmental Sciences & Ecology; Geology
GA 593RV
UT WOS:000277478900002
ER
PT J
AU Jordanova, VK
Thorne, RM
Li, W
Miyoshi, Y
AF Jordanova, V. K.
Thorne, R. M.
Li, W.
Miyoshi, Y.
TI Excitation of whistler mode chorus from global ring current simulations
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID RADIATION BELT ELECTRONS; PITCH-ANGLE DIFFUSION; ION-CYCLOTRON WAVES;
SELF-CONSISTENT MODEL; MAGNETIC STORM; GEOMAGNETIC STORMS; RELATIVISTIC
ENERGIES; RESONANT DIFFUSION; PLASMA SHEET; ACCELERATION
AB We simulate ring current dynamics during the 22 April 2001 geomagnetic storm (Dst(min) =-102 nT) using our global ring current-atmosphere interactions model (RAM) extended to relativistic energies and electrons. The model retains four dimensions by solving the bounce-averaged kinetic equation as a function of radial distance in the equatorial plane, magnetic local time (MLT), energy, and pitch angle. RAM includes time-dependent convective transport and radial diffusion, all major loss processes, and is coupled with a dynamic 2-D plasmasphere model. The global electric fields, as well as the boundary conditions at geosynchronous orbit, are specified from the Rice Convection Model (RCM) driven by a plasma sheet source population that depends on interplanetary conditions. The 1-30 keV electron fluxes simulated with RAM during the main phase of the storm at 4 <= L <= 6.5 agree reasonably well with THEMIS statistical data for active times (AE* > 300 nT). We calculate the pitch angle anisotropy of ring current electrons and the linear growth rate of whistler mode chorus in the equatorial plane at L <= 6.5 and for all MLT. Intense chorus waves are generated outside the plasmasphere ( L > 4) in the premidnight to dawn local time sector by ring current electrons with similar to 5 keV resonant energy. The chorus intensification on the dayside is smaller, and it is caused by higher-energy similar to 10 keV electrons. We present first results of the path-integrated amplification of chorus obtained with the HOTRAY code using RAM outputs at selected locations. Significant chorus amplification with wave gain G >= 200 dB is obtained near local midnight after the fresh injections of ring current electrons from the plasma sheet. The global distribution of enhanced chorus waves on the nightside shows good agreement with recent surveys of near-equatorial plasma wave data from satellites.
C1 [Jordanova, V. K.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Thorne, R. M.; Li, W.] Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA.
[Miyoshi, Y.] Nagoya Univ, Solar Terr Environm Lab, Nagoya, Aichi 4648601, Japan.
RP Jordanova, VK (reprint author), Los Alamos Natl Lab, MS D466, Los Alamos, NM 87545 USA.
EM vania@lanl.gov
RI Li, Wen/F-3722-2011; Miyoshi, Yoshizumi/B-5834-2015;
OI Miyoshi, Yoshizumi/0000-0001-7998-1240; Jordanova,
Vania/0000-0003-0475-8743
FU NASA [NNG08EK60I, NNX08A035G, NNH08AJ01I]; U.S. Department of Energy;
NSF [ATM0703210]
FX This collaborative work at LANL and UCLA was supported by NASA
Heliophysics Theory grants NNG08EK60I and NNX08A035G. We would like to
thank C.-P. Wang for providing output from the RCM code and R. Horne and
L. Lyons for helpful discussions related to this study. We acknowledge
the THEMIS particle team for providing ESA and SST data on electron
distribution. Work at Los Alamos was conducted under the auspices of the
U.S. Department of Energy, with partial support from NASA grant
NNH08AJ01I and NSF grant ATM0703210.
NR 66
TC 38
Z9 38
U1 0
U2 0
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD MAY 5
PY 2010
VL 115
AR A00F10
DI 10.1029/2009JA014810
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 593SK
UT WOS:000277480700002
ER
PT J
AU Meldrum, T
Seim, KL
Bajaj, VS
Palaniappan, KK
Wu, W
Francis, MB
Wemmer, DE
Pines, A
AF Meldrum, Tyler
Seim, Kristen L.
Bajaj, Vikram S.
Palaniappan, Krishnan K.
Wu, Wesley
Francis, Matthew B.
Wemmer, David E.
Pines, Alexander
TI A Xenon-Based Molecular Sensor Assembled on an MS2 Viral Capsid Scaffold
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID RESONANCE CONTRAST AGENTS; MAGNETIC-RESONANCE; MRI CONTRAST; BIOSENSOR;
AMPLIFICATION; EXCHANGE; NMR
AB In MRI, anatomical structures are most often differentiated by variations in their bulk magnetic properties. Alternatively, exogenous contrast agents can be attached to chemical moieties that confer affinity to molecular targets; the distribution of such contrast agents can be imaged by magnetic resonance. Xenon-based molecular sensors are molecular imaging agents that rely on the reversible exchange of hyperpolarized xenon between the bulk and a specifically targeted host-guest complex. We have incorporated similar to 125 xenon sensor molecules in the interior of an MS2 viral capsid, conferring multivalency and other properties of the viral capsid to the sensor molecule. The resulting signal amplification facilitates the detection of sensor at 0.7 pM, the lowest to date for any molecular imaging agent used in magnetic resonance. This amplification promises the detection of chemical targets at much lower concentrations than would be possible without the capsid scaffold.
C1 [Pines, Alexander] Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Pines, A (reprint author), Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA.
EM pines@berkeley.edu
RI Meldrum, Tyler/P-7420-2015
OI Meldrum, Tyler/0000-0002-5954-0795
FU Office of Science, Office of Basic Energy Sciences, Materials Sciences
and Engineering Division, of the U.S. Department of Energy
[DE-AC03-76SF00098, DE-AC02-05CH11231]
FX This work was supported by the Director, Office of Science, Office of
Basic Energy Sciences, Materials Sciences and Engineering Division, of
the U.S. Department of Energy under Contract Nos. DE-AC03-76SF00098 and
DE-AC02-05CH11231.
NR 23
TC 56
Z9 58
U1 1
U2 24
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD MAY 5
PY 2010
VL 132
IS 17
BP 5936
EP +
DI 10.1021/ja100319f
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 589OA
UT WOS:000277158500007
PM 20392049
ER
PT J
AU Augustine, AJ
Kjaergaard, C
Qayyum, M
Ziegler, L
Kosman, DJ
Hodgson, KO
Hedman, B
Solomon, EI
AF Augustine, Anthony J.
Kjaergaard, Christian
Qayyum, Munzarin
Ziegler, Lynn
Kosman, Daniel J.
Hodgson, Keith O.
Hedman, Britt
Solomon, Edward I.
TI Systematic Perturbation of the Trinuclear Copper Cluster in the
Multicopper Oxidases: The Role of Active Site Asymmetry in Its Reduction
of O-2 to H2O
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID MAGNETIC CIRCULAR-DICHROISM; RHUS-VERNICIFERA LACCASE; O-O BOND;
ELECTRONIC-STRUCTURE; NATIVE LACCASE; ASCORBATE OXIDASE;
CRYSTAL-STRUCTURE; CU CLUSTER; PEROXIDE INTERMEDIATE; DIOXYGEN REDUCTION
AB The multicopper oxidase Fet3p catalyzes the four-electron reduction of dioxygen to water, coupled to the one-electron oxidation of four equivalents of substrate. To carry out this process, the enzyme utilizes four Cu atoms: a type 1, a type 2, and a coupled binuclear, type 3 site. Substrates are oxidized at the T1 Cu, which rapidly transfers electrons, 13 angstrom away, to a trinuclear copper cluster composed of the T2 and T3 sites, where dioxygen is reduced to water in two sequential 2e(-) steps. This study focuses on two variants of Fet3p, H126Q and H483Q, that perturb the two T3 Cu's, T3 alpha and T3 beta, respectively. The variants have been isolated in both holo and type 1 depleted (T1D) forms, T1DT3 alpha Q and T1DT3 beta Q, and their trinuclear copper clusters have been characterized in their oxidized and reduced states. While the variants are only mildly perturbed relative to T1D in the resting oxidized state, in contrast to T1D they are both found to have lost a ligand in their reduced states. Importantly, T1DT3 alpha Q reacts with O-2, but T1DT3 beta Q does not. Thus loss of a ligand at T3 beta, but not at T3 alpha, turns off O-2 reactivity, indicating that T3 beta and T2 are required for the 2e(-) reduction of O-2 to form the peroxide intermediate (PI), whereas T3 alpha remains reduced. This is supported by the spectroscopic features of PI in T1DT3 alpha Q, which are identical to T1D PI. This selective redox activity of one edge of the trinuclear cluster demonstrates its asymmetry in O-2 reactivity. The structural origin of this asymmetry between the T3 alpha and T3 beta is discussed, as is its contribution to reactivity.
C1 [Ziegler, Lynn; Kosman, Daniel J.] SUNY Buffalo, Dept Biochem, Sch Med & Biomed Sci, Buffalo, NY 14214 USA.
[Augustine, Anthony J.; Kjaergaard, Christian; Qayyum, Munzarin; Hodgson, Keith O.; Solomon, Edward I.] Stanford Univ, Dept Chem, Stanford, CA 94305 USA.
[Hodgson, Keith O.; Hedman, Britt; Solomon, Edward I.] Stanford Univ, SLAC, Stanford Synchrotron Radiat Lightsource, Stanford, CA 94309 USA.
RP Kosman, DJ (reprint author), SUNY Buffalo, Dept Biochem, Sch Med & Biomed Sci, Buffalo, NY 14214 USA.
EM camkos@buffalo.edu; edward.solomon@stanford.edu
FU NIH [DK31450, RR-01209, DK53820]; Department of Energy, Office of Basic
Energy Sciences; National Center for Research Resources (NCRR), NIH [5
P41 RR001209]
FX This research was supported by NIH grants DK31450 (to E.I.S.), RR-01209
(to K.O.H.), and DK53820 (to D.J.K.). SSRL operations are funded by the
Department of Energy, Office of Basic Energy Sciences. The SSRL
Structural Molecular Biology program is supported by the National
Institutes of Health, National Center for Research Resources, Biomedical
Technology Program and by the Department of Energy, Office of Biological
and Environmental Research. This publication was made possible by Grant
No. 5 P41 RR001209 from the National Center for Research Resources
(NCRR), a component of the National Institutes of Health (NIH). Its
contents are soley the responsibility of the authors and do not
necessarily represent the official view of NCRR or NIH.
NR 54
TC 27
Z9 29
U1 1
U2 32
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD MAY 5
PY 2010
VL 132
IS 17
BP 6057
EP 6067
DI 10.1021/ja909143d
PG 11
WC Chemistry, Multidisciplinary
SC Chemistry
GA 589OA
UT WOS:000277158500040
PM 20377263
ER
PT J
AU Miller, RA
Stephanopoulos, N
McFarland, JM
Rosko, AS
Geissler, PL
Francis, MB
AF Miller, Rebekah A.
Stephanopoulos, Nicholas
McFarland, Jesse M.
Rosko, Andrew S.
Geissler, Phillip L.
Francis, Matthew B.
TI Impact of Assembly State on the Defect Tolerance of TMV-Based Light
Harvesting Arrays
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID TOBACCO-MOSAIC-VIRUS; CYANOBACTERIAL PHOTOSYSTEM-I; ENERGY-TRANSFER;
TRANSFER HYDROGENATION; COMPLEX; PROTEIN; PHOTOSYNTHESIS; SCAFFOLD;
ACID; BACTERIOPHAGE-MS2
AB Self-assembling, light harvesting arrays of organic chromophores can be templated using the tobacco mosaic virus coat protein (TMVP). The efficiency of energy transfer within systems containing a high ratio of donors to acceptors shows a strong dependence on the TMVP assembly state. Rod and disk assemblies derived from a single stock of chromophore-labeled protein exhibit drastically different levels of energy transfer, with rods significantly outperforming disks. The origin of the superior transfer efficiency was probed through the controlled introduction of photoinactive conjugates into the assemblies. The efficiency of the rods showed a linear dependence on the proportion of deactivated chromophores, suggesting the availability of redundant energy transfer pathways that can circumvent defect sites. Similar disk-based systems were markedly less efficient at all defect levels. To examine these differences further, the brightness of donor-only systems was measured as a function of defect incorporation. In rod assemblies, the photophysical properties of the donor chromophores showed a significant dependence on the number of defects. These differences can be partly attributed to vertical energy transfer events in rods that occur more rapidly than the horizontal transfers in disks. Using these geometries and the previously measured energy transfer rates, computational models were developed to understand this behavior in more detail and to guide the optimization of future systems. These simulations have revealed that significant differences in excited state dissipation rates likely also contribute to the greater efficiency of the rods and that statistical variations in the assembly process play a more minor role.
C1 [Francis, Matthew B.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Francis, MB (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM francis@cchem.berkeley.edu
FU Office of Science, Materials Sciences and Engineering Division, of the
US Department of Energy [DE-AC02-05CH11231]; Berkeley Chemcal Biology
Graduate Program [1 T32GMO66698]; NSF IGERT program [DGE-0333455]
FX This work was supported by the Director, Office of Science, Materials
Sciences and Engineering Division, of the US Department of Energy under
Contract No. DE-AC02-05CH11231. We gratefully acknowledge the Berkeley
Chemcal Biology Graduate Program (NRSA Training Grant 1 T32GMO66698) for
generous financial support. R.A.M. acknowldedges the NSF IGERT program
(DGE-0333455) for a graduate fellowship. We would also like to thank
Prof. Kenneth H. Sauer for many helpful discussions.
NR 40
TC 56
Z9 56
U1 0
U2 47
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD MAY 5
PY 2010
VL 132
IS 17
BP 6068
EP 6074
DI 10.1021/ja909566z
PG 7
WC Chemistry, Multidisciplinary
SC Chemistry
GA 589OA
UT WOS:000277158500041
PM 20392093
ER
PT J
AU Goddard, G
Brown, LO
Habbersett, R
Brady, CI
Martin, JC
Graves, SW
Freyer, JP
Doorn, SK
AF Goddard, Gregory
Brown, Leif O.
Habbersett, Robb
Brady, Christina I.
Martin, John C.
Graves, Steven W.
Freyer, James P.
Doorn, Stephen K.
TI High-Resolution Spectral Analysis of Individual SERS-Active
Nanoparticles in Flow
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID SURFACE-ENHANCED RAMAN; ORGANIC-INORGANIC NANOPARTICLES; CYTOMETRIC
ANALYSIS; SCATTERING; SPECTROSCOPY; DNA; FLUORESCENCE; SYSTEM; SILVER;
CELLS
AB Nanoparticle spectroscopic tags based on surface enhanced Raman scattering (SERS) are playing an increasingly important role in bioassay and imaging applications. The ability to rapidly characterize large populations of such tags spectroscopically in a high-throughput flow-based platform will open new areas for their application and provide new tools for advancing their development. We demonstrate here a high-resolution spectral flow cytometer capable of acquiring Raman spectra of individual SERS-tags at flow rates of hundreds of particles per second, while maintaining the spectral resolution required to make full use of the detailed information encoded in the Raman signature for advanced multiplexing needs. The approach allows multiple optical parameters to be acquired simultaneously over thousands of individual nanoparticle tags. Characteristics such as tag size, brightness, and spectral uniformity are correlated on a per-particle basis. The tags evaluated here display highly uniform spectral signatures, but with greater variability in brightness. Subpopulations in the SERS response, not apparent in ensemble measurements, are also shown to exist. Relating tag variability to synthesis parameters makes flow-based spectral characterization a powerful tool for advancing particle development through its ability to provide rapid feedback on strategies aimed at constraining desired tag properties. Evidence for single-tag signal saturation at high excitation power densities is also shown, suggesting a role for high-throughput investigation of fundamental properties of the SERS tags as well.
C1 [Goddard, Gregory; Habbersett, Robb; Martin, John C.; Freyer, James P.] Los Alamos Natl Lab, Div Biosci, Los Alamos, NM 87545 USA.
[Brown, Leif O.; Brady, Christina I.; Doorn, Stephen K.] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA.
[Graves, Steven W.] Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA.
RP Doorn, SK (reprint author), Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA.
EM skdoorn@lanl.gov
FU LANL Laboratory Directed Research and Development funds; NIH [RR-01315]
FX This research was supported by LANL Laboratory Directed Research and
Development funds and the National Flow Cytometry Resource (NIH Grant
RR-01315)
NR 56
TC 40
Z9 40
U1 2
U2 33
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD MAY 5
PY 2010
VL 132
IS 17
BP 6081
EP 6090
DI 10.1021/ja909850s
PG 10
WC Chemistry, Multidisciplinary
SC Chemistry
GA 589OA
UT WOS:000277158500043
PM 20143808
ER
PT J
AU Jalilov, AS
Li, GQ
Nelsen, SF
Guzei, IA
Wu, Q
AF Jalilov, Almaz S.
Li, Gaoquan
Nelsen, Stephen F.
Guzei, Ilia A.
Wu, Qin
TI Solution and Solid-State Studies of Doubly Trimethylene-Bridged
Tetraalkyl p-Phenylenediamine Diradical Dication Conformations
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; CHEMISTRY; STACKING; DIMERS
AB X-ray crystallographic structures are reported for 1(Me)(2+)(SbCl(6)(-))(2)center dot 2CH(3)CN, 2(Et)(2+) (SbF(6)(-))(2)center dot 2CH(3)CN center dot 2CH(2)Cl(2), and 1(iPr)(2+)(SbF(6)(-))(2), which also contained unresolved solvent and is in a completely different conformation than the methyl- and ethyl-substituted compounds. A quite different structure of 1(Me)(2+)(SbF(6)(-))(2) than that previously published was obtained upon crystallizing it from a mixture rich in monocation. It does not contain close intramolecular PD(+),PD(+) contacts but has close intermolecular ones. Low temperature NMR spectra of 1(Me)(2+) and 1(Et)(2+) in 2:1 CD(3)OD/CD(3)CN showed that both contain three conformations of all-gauche NCCC unit material with close intramolecular PD(+),PD(+) contacts. In addition to the both PD(+) ring syn and anti material that had been seen in the crystal structure of 1(Me)(2+)(SbF(6)(-))(2)center dot 2CH(3)CN published previously, an unsymmetrical conformation having one PD(+) ring syn and the other anti (abbreviated uns) was seen, and the relative amounts of these conformations were significantly different for 1(Me)(2+) and 1(Et)(2+). Calculations that correctly obtain the relative amounts of both the methyl- and ethyl-substituted material as well as changes in the optical spectra between 1(Me)(2+) and 1(Et)(2+), which contains much less of the uns conformation, are reported.
C1 [Jalilov, Almaz S.; Li, Gaoquan; Nelsen, Stephen F.; Guzei, Ilia A.] Univ Wisconsin, Dept Chem, Madison, WI 53706 USA.
[Guzei, Ilia A.] Brookhaven Natl Lab, Mol Struct Lab, Upton, NY 11973 USA.
[Wu, Qin] Brookhaven Natl Lab, Ctr Funct Narzomat, Upton, NY 11973 USA.
RP Nelsen, SF (reprint author), Univ Wisconsin, Dept Chem, 1101 Univ Ave, Madison, WI 53706 USA.
EM nelsen@chem.wisc.edu
RI Wu, Qin/C-9483-2009; Jalilov, Almaz/O-3210-2015;
OI Wu, Qin/0000-0001-6350-6672; Jalilov, Almaz/0000-0002-8932-2107
FU National Science foundation [CHE-0647719]; U.S. Department of Energy,
Office of Basic Energy Sciences [DE-AC02-98CH10886]
FX S.F.N. thanks the National Science foundation for support under
CHE-0647719. Q.W. is supported by the U.S. Department of Energy, Office
of Basic Energy Sciences, under Contract No. DE-AC02-98CH10886.
NR 22
TC 14
Z9 14
U1 2
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD MAY 5
PY 2010
VL 132
IS 17
BP 6176
EP 6182
DI 10.1021/ja100322k
PG 7
WC Chemistry, Multidisciplinary
SC Chemistry
GA 589OA
UT WOS:000277158500052
PM 20377224
ER
PT J
AU Janssen, PJ
Van Houdt, R
Moors, H
Monsieurs, P
Morin, N
Michaux, A
Benotmane, MA
Leys, N
Vallaeys, T
Lapidus, A
Monchy, B
Medigue, C
Taghavi, S
McCorkle, S
Dunn, J
van der Lelie, D
Mergeay, M
AF Janssen, Paul J.
Van Houdt, Rob
Moors, Hugo
Monsieurs, Pieter
Morin, Nicolas
Michaux, Arlette
Benotmane, Mohammed A.
Leys, Natalie
Vallaeys, Tatiana
Lapidus, Alla
Monchy, Bastien
Medigue, Claudine
Taghavi, Safiyh
McCorkle, Sean
Dunn, John
van der Lelie, Daniel
Mergeay, Max
TI The Complete Genome Sequence of Cupriavidus metallidurans Strain CH34, a
Master Survivalist in Harsh and Anthropogenic Environments
SO PLOS ONE
LA English
DT Article
ID ALCALIGENES-EUTROPHUS CH34; HEAVY-METAL RESISTANCE; INTRACELLULAR
3-HYDROXYBUTYRATE-OLIGOMER HYDROLASE; TRANSPORTER CLASSIFICATION
DATABASE; MICROBIAL SIGNAL-TRANSDUCTION; COMPLETE NUCLEOTIDE-SEQUENCE; 2
CAPSULAR POLYSACCHARIDES; COPPER-BINDING PROTEIN; COENZYME-A REDUCTASE;
RALSTONIA-EUTROPHA
AB Many bacteria in the environment have adapted to the presence of toxic heavy metals. Over the last 30 years, this heavy metal tolerance was the subject of extensive research. The bacterium Cupriavidus metallidurans strain CH34, originally isolated by us in 1976 from a metal processing factory, is considered a major model organism in this field because it withstands milli-molar range concentrations of over 20 different heavy metal ions. This tolerance is mostly achieved by rapid ion efflux but also by metal-complexation and -reduction. We present here the full genome sequence of strain CH34 and the manual annotation of all its genes. The genome of C. metallidurans CH34 is composed of two large circular chromosomes CHR1 and CHR2 of, respectively, 3,928,089 bp and 2,580,084 bp, and two megaplasmids pMOL28 and pMOL30 of, respectively, 171,459 bp and 233,720 bp in size. At least 25 loci for heavy-metal resistance (HMR) are distributed over the four replicons. Approximately 67% of the 6,717 coding sequences (CDSs) present in the CH34 genome could be assigned a putative function, and 9.1% (611 genes) appear to be unique to this strain. One out of five proteins is associated with either transport or transcription while the relay of environmental stimuli is governed by more than 600 signal transduction systems. The CH34 genome is most similar to the genomes of other Cupriavidus strains by correspondence between the respective CHR1 replicons but also displays similarity to the genomes of more distantly related species as a result of gene transfer and through the presence of large genomic islands. The presence of at least 57 IS elements and 19 transposons and the ability to take in and express foreign genes indicates a very dynamic and complex genome shaped by evolutionary forces. The genome data show that C. metallidurans CH34 is particularly well equipped to live in extreme conditions and anthropogenic environments that are rich in metals.
C1 [Janssen, Paul J.; Van Houdt, Rob; Moors, Hugo; Monsieurs, Pieter; Morin, Nicolas; Michaux, Arlette; Benotmane, Mohammed A.; Leys, Natalie; Mergeay, Max] Belgian Nucl Res Ctr SCK CEN, Mol, Belgium.
[Vallaeys, Tatiana] Univ Montpellier 2, Lab Ecosyst Lagunaires ECOLAG, CNRS, UMR 5119, Montpellier, France.
[Lapidus, Alla] Lawrence Berkeley Natl Lab, Joint Genome Inst, Walnut Creek, CA USA.
[Monchy, Bastien] Univ Clermont Ferrand, LMGE, CNRS, UMR 6023, Aubiere, France.
[Medigue, Claudine] CNRS, UMR8030, Lab Anal Bioinformat Genom & Metab LABGeM, Evry, France.
[Medigue, Claudine] CEA DSV IG Genoscope, Evry, France.
[Taghavi, Safiyh; McCorkle, Sean; Dunn, John; van der Lelie, Daniel] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
RP Janssen, PJ (reprint author), Belgian Nucl Res Ctr SCK CEN, Mol, Belgium.
EM pjanssen@sckcen.be
RI Monsieurs, Pieter/A-2917-2009; Mergeay, Max/H-2003-2011; Lapidus,
Alla/I-4348-2013; Van Houdt, Rob/B-8599-2011;
OI Lapidus, Alla/0000-0003-0427-8731; Van Houdt, Rob/0000-0002-7459-496X;
Janssen, Paul/0000-0002-7877-0270
FU SCK/CEN; European Space Agency [90037, 90094]; Brookhaven and Lawrence
Berkeley National Laboratories [LDRD09-005]; United States Department of
Energy, Office of Science, Biological and Environmental Research (BER)
[KP1102010, DE-AC02-98CH10886]; U.S. Department of Energy
FX The work was partially supported by internal funds of SCK/CEN, by the
European Space Agency through the MESSAGE contracts (PRODEX agreements
No. 90037 and 90094), and by Laboratory Directed Research and
Development funds at the Brookhaven and Lawrence Berkeley National
Laboratories. JD, SMcC, ST and DvdL acknowledge support by the United
States Department of Energy, Office of Science, Biological and
Environmental Research (BER), project number KP1102010 under contract
DE-AC02-98CH10886, and by Laboratory Directed Research and Development
funds (LDRD09-005) at the Brookhaven National Laboratory under contract
with the U.S. Department of Energy. SM and NM acknowledge the support
via a SCK/CEN PhD grant (AWM-programme). The funders had no role in
study design, data collection and analysis, decision to publish, or
preparation of the manuscript.
NR 226
TC 95
Z9 98
U1 3
U2 30
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD MAY 5
PY 2010
VL 5
IS 5
AR e10433
DI 10.1371/journal.pone.0010433
PG 33
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 592LC
UT WOS:000277379400008
PM 20463976
ER
PT J
AU Smith, DP
Kitner, JB
Norbeck, AD
Clauss, TR
Lipton, MS
Schwalbach, MS
Steindler, L
Nicora, CD
Smith, RD
Giovannoni, SJ
AF Smith, Daniel P.
Kitner, Joshua B.
Norbeck, Angela D.
Clauss, Therese R.
Lipton, Mary S.
Schwalbach, Michael S.
Steindler, Laura
Nicora, Carrie D.
Smith, Richard D.
Giovannoni, Stephen J.
TI Transcriptional and Translational Regulatory Responses to Iron
Limitation in the Globally Distributed Marine Bacterium Candidatus
Pelagibacter Ubique
SO PLOS ONE
LA English
DT Article
ID MESSENGER-RNA EXPRESSION; EQUATORIAL PACIFIC-OCEAN; COLD-SHOCK PROTEINS;
DNA-BINDING SITE; ESCHERICHIA-COLI; GENE-EXPRESSION; IRR PROTEIN;
CSPA-FAMILY; BRADYRHIZOBIUM-JAPONICUM; MASS-SPECTROMETRY
AB Iron is recognized as an important micronutrient that limits microbial plankton productivity over vast regions of the oceans. We investigated the gene expression responses of Candidatus Pelagibacter ubique cultures to iron limitation in natural seawater media supplemented with a siderophore to chelate iron. Microarray data indicated transcription of the periplasmic iron binding protein sfuC increased by 16-fold, and iron transporter subunits, iron-sulfur center assembly genes, and the putative ferroxidase rubrerythrin transcripts increased to a lesser extent. Quantitative peptide mass spectrometry revealed that sfuC protein abundance increased 27-fold, despite an average decrease of 59% across the global proteome. Thus, we propose sfuC as a marker gene for indicating iron limitation in marine metatranscriptomic and metaproteomic ecological surveys. The marked proteome reduction was not directly correlated to changes in the transcriptome, implicating post-transcriptional regulatory mechanisms as modulators of protein expression. Two RNA-binding proteins, CspE and CspL, correlated well with iron availability, suggesting that they may contribute to the observed differences between the transcriptome and proteome. We propose a model in which the RNA-binding activity of CspE and CspL selectively enables protein synthesis of the iron acquisition protein SfuC during transient growth-limiting episodes of iron scarcity.
C1 [Smith, Daniel P.] Oregon State Univ, Mol & Cellular Biol Program, Corvallis, OR 97331 USA.
[Kitner, Joshua B.; Schwalbach, Michael S.; Steindler, Laura; Giovannoni, Stephen J.] Oregon State Univ, Dept Microbiol, Corvallis, OR 97331 USA.
[Norbeck, Angela D.; Clauss, Therese R.; Lipton, Mary S.; Nicora, Carrie D.; Smith, Richard D.] Pacific NW Natl Lab, Biol & Computat Sci Div, Richland, WA 99352 USA.
RP Smith, DP (reprint author), Oregon State Univ, Mol & Cellular Biol Program, Corvallis, OR 97331 USA.
EM steve.giovannoni@oregonstate.edu
RI Smith, Richard/J-3664-2012
OI Smith, Richard/0000-0002-2381-2349
FU Gordon and Betty Moore Foundation [607_01]; U.S. Department of Energy's
Office of Biological and Environmental Research, located at Pacific
Northwest National Laboratory; DOE [DE-AC05-76RL01830]
FX This work was supported by Marine Microbiology Initiative award number
607_01 from the Gordon and Betty Moore Foundation
(http://www.moore.org/). Portions of this research were performed at the
W. R. Wiley Environmental Molecular Science Laboratory, a national
scientific user facility sponsored by the U.S. Department of Energy's
Office of Biological and Environmental Research, located at Pacific
Northwest National Laboratory (http://www.pnl.gov/). PNNL is operated by
Battelle Memorial Institute under DOE contract DE-AC05-76RL01830. The
funders had no role in study design, data collection and analysis,
decision to publish, or preparation of the manuscript.
NR 72
TC 21
Z9 21
U1 1
U2 14
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD MAY 5
PY 2010
VL 5
IS 5
AR e10487
DI 10.1371/journal.pone.0010487
PG 10
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 592LC
UT WOS:000277379400023
PM 20463970
ER
PT J
AU Rong, LB
Dahari, H
Ribeiro, RM
Perelson, AS
AF Rong, Libin
Dahari, Harel
Ribeiro, Ruy M.
Perelson, Alan S.
TI Rapid Emergence of Protease Inhibitor Resistance in Hepatitis C Virus
SO SCIENCE TRANSLATIONAL MEDICINE
LA English
DT Article
ID NONNUCLEOSIDE POLYMERASE INHIBITOR; ANTIVIRAL ACTIVITY; VIRAL DYNAMICS;
NS3 PROTEASE; IN-VIVO; PEGYLATED INTERFERON-ALPHA-2B; COMBINATION
THERAPY; TELAPREVIR VX-950; INFECTED PATIENTS; GENETIC-VARIATION
AB About 170 million people worldwide are infected with hepatitis C virus (HCV). The current standard therapy leads to sustained viral elimination in only similar to 50% of the treated patients. Telaprevir, an HCV protease inhibitor, has substantial antiviral activity in patients with chronic HCV infection. However, in clinical trials, drug-resistant variants emerge at frequencies of 5 to 20% of the total virus population as early as the second day after the beginning of treatment. Here, using probabilistic and viral dynamic models, we show that such rapid emergence of drug resistance is expected. We calculate that all possible single-and double-mutant viruses preexist before treatment and that one additional mutation is expected to arise during therapy. Examining data from a clinical trial of telaprevir therapy for HCV infection in detail, we show that our model fits the observed dynamics of both drug-sensitive and drug-resistant viruses and argue that therapy with only direct antivirals will require drug combinations that have a genetic barrier of four or more mutations.
C1 [Rong, Libin; Ribeiro, Ruy M.; Perelson, Alan S.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Rong, Libin] Oakland Univ, Dept Math & Stat, Rochester, MI 48309 USA.
[Rong, Libin] Oakland Univ, Ctr Biomed Res, Rochester, MI 48309 USA.
[Dahari, Harel] Univ Illinois, Dept Med, Chicago, IL 60612 USA.
RP Perelson, AS (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM asp@lanl.gov
OI Ribeiro, Ruy/0000-0002-3988-8241
FU U.S. Department of Energy [DE-AC52-06NA25396]; NIH [P30-EB011339,
P20-RR18754, RR06555-18, AI28433-19, AI065256]; University of Illinois
Walter Payton Liver Center GUILD
FX We thank T. L. Kieffer for providing the patient data and J. G.
McHutchison, J.-M. Pawlotsky, R. T. Schooley, and K. E. Sherman for
helpful comments. Funding: Portions of this work were performed under
the auspices of the U.S. Department of Energy under contract
DE-AC52-06NA25396 and supported by NIH grants P30-EB011339 (L.R.),
P20-RR18754 (R. M. R. and H.D.), RR06555-18, AI28433-19, and AI065256
(A.S.P.) and the University of Illinois Walter Payton Liver Center GUILD
(H. D.).
NR 65
TC 155
Z9 157
U1 0
U2 9
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 1946-6234
J9 SCI TRANSL MED
JI Sci. Transl. Med.
PD MAY 5
PY 2010
VL 2
IS 30
AR 30ra32
DI 10.1126/scitranslmed.3000544
PG 9
WC Cell Biology; Medicine, Research & Experimental
SC Cell Biology; Research & Experimental Medicine
GA 591ZA
UT WOS:000277342900003
PM 20445200
ER
PT J
AU Zhang, Q
Ge, JP
Goebl, J
Hu, YX
Sun, YG
Yin, YD
AF Zhang, Qiao
Ge, Jianping
Goebl, James
Hu, Yongxing
Sun, Yugang
Yin, Yadong
TI Tailored Synthesis of Superparamagnetic Gold Nanoshells with Tunable
Optical Properties
SO ADVANCED MATERIALS
LA English
DT Article
ID ENHANCED RAMAN-SCATTERING; COLLOIDAL PARTICLES; METAL NANOSHELLS;
GENERAL-METHOD; SILICA SHELL; NANOPARTICLES; NANOCRYSTAL;
NANOSTRUCTURES; ABSORPTION; THERAPY
AB Multifunctional Au nanoshells with tunable optical properties and fast magnetic response have been fabricated through a sequence of sol gel, surface-protected etching, and seed-mediated growth processes. The use of a porous silica layer enhances the uniformity of nanoshell growth, the reproducibility of the synthesis, and the structural and optical stability of the products.
C1 [Zhang, Qiao; Ge, Jianping; Goebl, James; Hu, Yongxing; Yin, Yadong] Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA.
[Sun, Yugang] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Yin, YD (reprint author), Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA.
EM yadong.yin@ucr.edu
RI Zhang, Qiao/C-2251-2008; Yin, Yadong/D-5987-2011; Sun, Yugang
/A-3683-2010; Hu, Yongxing/D-3548-2013; Wei, Zhanhua/D-7544-2013; Ge,
Jianping /B-4681-2012
OI Zhang, Qiao/0000-0001-9682-3295; Yin, Yadong/0000-0003-0218-3042; Sun,
Yugang /0000-0001-6351-6977; Hu, Yongxing/0000-0003-2264-9356; Wei,
Zhanhua/0000-0003-2687-0293;
FU University of California, Riverside; Donors of the Petroleum Research
Fund; U.S. Department of Energy, Office of Science, Office of Basic
Energy Sciences [DE-AC02-06CH11357]
FX Y.Y. thanks the University of California, Riverside, for start-up funds.
Acknowledgment is also made to the Donors of the Petroleum Research
Fund, administered by the American Chemical Society, for support of this
research. Y.Y. is a Cottrell Scholar of Research Corporation for Science
Advancement. Use of the Center for Nanoscale Materials was supported by
the U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences, under Contract No. DE-AC02-06CH11357. Supporting Information
is available online from Wiley InterScience or from the author. This
article is part of a Special Issue on USTC Materials Science.
NR 36
TC 88
Z9 88
U1 4
U2 129
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0935-9648
J9 ADV MATER
JI Adv. Mater.
PD MAY 4
PY 2010
VL 22
IS 17
BP 1905
EP +
DI 10.1002/adma.200903748
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 599YC
UT WOS:000277949200003
PM 20526992
ER
PT J
AU Mei, DH
Rousseau, R
Kathmann, SM
Glezakou, VA
Engelhard, MH
Jiang, WL
Wang, CM
Gerber, MA
White, JF
Stevens, DJ
AF Mei, Donghai
Rousseau, Roger
Kathmann, Shawn M.
Glezakou, Vassiliki-Alexandra
Engelhard, Mark H.
Jiang, Weilin
Wang, Chongmin
Gerber, Mark A.
White, James F.
Stevens, Don J.
TI Ethanol synthesis from syngas over Rh-based/SiO2 catalysts: A combined
experimental and theoretical modeling study
SO JOURNAL OF CATALYSIS
LA English
DT Article
DE Syngas; Ethanol; Rhodium nanoparticles; Manganese; Promoters; Density
functional theory; Kinetic Monte Carlo
ID DENSITY-FUNCTIONAL THEORY; MONTE-CARLO-SIMULATION; SUPPORTED RHODIUM
CATALYSTS; TRANSITION-METAL SURFACES; BIOMASS-DERIVED SYNGAS; RH-BASED
CATALYSTS; RH/SIO2 CATALYSTS; CO DISSOCIATION; CARBON-MONOXIDE;
NITRIC-OXIDE
AB Catalytic conversion of biomass-derived synthesis gas to ethanol and other C oxygenates has received considerable attention recently due to the strong demands for alternative, renewable energy sources. Combining experimental measurements with first-principles-based kinetic modeling, we investigated the reaction kinetics of ethanol synthesis from CO hydrogenation over SiO2 -supported Rh/Mn alloy catalysts. We find that an Mn promoter can exist in a binary alloy with Rh and play a critical role in lowering the CO insertion reaction (CO + CHx (x = 1-3)) barriers thus improving the selectivity toward ethanol and other C-2(+) oxygenates, although the barrier toward methane formation is unaffected. The postulation of supported Rh/Mn alloy nanoparticle being the active phase is supported by our experimental characterization using X-ray photoelectron spectroscopy, transmission electron microscopy, and X-ray diffraction of practically used Rh/Mn/SiO2 catalysts. First-principles density functional theory (DFT) calculations further confirmed that the binary Rh/Mn alloy is thermodynamically more stable than the mixed metal/metal oxides under the reducing reaction condition. The reaction kinetics of CO hydrogenation to ethanol on the three-dimensional Rh/Mn nanoparticle under experimental operating conditions was studied using kinetic Monte Carlo (KMC) simulations. The simulated reaction kinetics is qualitatively consistent with experimental observations. Finally, the effects of various promoters (M = Ir, Ga, V, Ti, Sc, Ca, and Li) on the CO insertion reaction over Rh/M alloy nanoparticles were investigated using DFT calculations. We found alloying the promoters with the electronegativity difference, Delta chi, between the promoter (M) and Rh being 0.7 is the most effective in lowering the barriers of CO insertion reaction, which leads to higher selectivity to ethanol. This conclusion is in excellent accord with the reported catalytic performance of CO hydrogenation over Rh-based catalysts with different promoters. We believe that the electronegativity difference criterion is very useful in improving the catalytic performance using transition metal-based catalysts for ethanol synthesis from CO hydrogenation. (C) 2010 Elsevier Inc. All rights reserved.
C1 [Mei, Donghai; Rousseau, Roger; Kathmann, Shawn M.; Glezakou, Vassiliki-Alexandra; Jiang, Weilin] Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA.
[Engelhard, Mark H.; Wang, Chongmin] Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA.
[Gerber, Mark A.; White, James F.; Stevens, Don J.] Pacific NW Natl Lab, Chem & Biol Proc Div, Richland, WA 99352 USA.
RP Mei, DH (reprint author), Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA.
EM donghai.mei@pnl.gov
RI Engelhard, Mark/F-1317-2010; Mei, Donghai/D-3251-2011; Mei,
Donghai/A-2115-2012; Rousseau, Roger/C-3703-2014;
OI Mei, Donghai/0000-0002-0286-4182; Jiang, Weilin/0000-0001-8302-8313;
Engelhard, Mark/0000-0002-5543-0812
FU US Department of Energy Office [DE-AC05-76RL01830, DE-AC06-76RLO-1830];
Department of Energy's Office of Biological and Environmental Research
located at Pacific Northwest National Laboratory (PNNL)
FX This work was supported by the US Department of Energy Office of EERE
Biomass Program under Contract DE-AC05-76RL01830, and was performed in
part using EMSL, a national scientific user facility sponsored by the
Department of Energy's Office of Biological and Environmental Research
located at Pacific Northwest National Laboratory (PNNL). PNNL is
operated for the US DOE by Battelle Memorial Institute under Contract
No. DE-AC06-76RLO-1830. Computational resources were provided by the
Molecular Science Computing Facility (EMSL) and the National Energy
Research Scientific Computing Center (NERSC) at Lawrence Berkeley
National Laboratory.
NR 77
TC 78
Z9 83
U1 11
U2 137
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9517
J9 J CATAL
JI J. Catal.
PD MAY 4
PY 2010
VL 271
IS 2
BP 325
EP 342
DI 10.1016/j.jcat.2010.02.020
PG 18
WC Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 603XD
UT WOS:000278240500018
ER
PT J
AU Senanayake, SD
Stacchiola, D
Evans, J
Estrella, M
Barrio, L
Perez, M
Hrbek, J
Rodriguez, JA
AF Senanayake, Sanjaya D.
Stacchiola, Dario
Evans, Jaime
Estrella, Michael
Barrio, Laura
Perez, Manuel
Hrbek, Jan
Rodriguez, Jose A.
TI Probing the reaction intermediates for the water-gas shift over inverse
CeOx/Au(111) catalysts
SO JOURNAL OF CATALYSIS
LA English
DT Article
DE Water-gas shift reaction; Ceria; Gold; CO; Water; Hydrogen; Formate;
Carbonate; Photoemission; X-ray absorption fine structure
ID OXIDE THIN-FILMS; CERIUM OXIDE; SUPPORT INTERACTIONS;
REACTION-MECHANISM; CO; NANOPARTICLES; SURFACES; AU(111); CEO2(111); STM
AB The water-gas shift (WGS) is an important reaction for the production of molecular H-2 from CO and H2O. An inverse CeOx/Au(1 1 1) catalyst exhibits a very good WGS activity, better than that of copper surfaces or Cu nanoparticles dispersed on a ZnO(0 0 0 (1) over bar) substrate which model current WGS industrial catalysts. In this work we report on intermediates likely to arise during the CO + H2O reaction over CeOx/Au(1 1 1) using soft X-ray photoemission (sXPS) and near-edge X-ray absorption fine structure (NEXAFS). Several potential intermediates including formates (HCOO), carbonates (CO3) and carboxylates (HOCO) are considered. Adsorption of HCOOH and CO2 is used to create both HCOO and CO3 on the CeOx/Au(1 1 1) surface, respectively. HCOO appears to have greater stability with desorption temperatures up to 600 K while CO3 only survives on the surface up to 300 K. On the CeOx/Au(1 1 1) catalysts, the presence of Ce3+ leads to the dissociation of H2O to give OH groups. We demonstrate experimentally that the OH species are stable on the surface up to 600 K and interact with CO to yield weakly bound intermediates. When there is an abundance of Ce4+, the OH concentration is diminished and the likely intermediates are carbonates. As the surface defects are increased and the Ce3+/Ce4+ ratio grows, the OH concentration also grows and both carbonate and formate species are observed on the surface after dosing CO to H2O/CeOx/Au(1 1 1). The addition of ceria nanoparticles to Au(1 1 1) is essential to generate an active WGS catalyst and to increase the production and stability of key reaction intermediates (OH, HCOO and CO3). (C) 2010 Elsevier Inc. All rights reserved.
C1 [Senanayake, Sanjaya D.; Stacchiola, Dario; Estrella, Michael; Barrio, Laura; Hrbek, Jan; Rodriguez, Jose A.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
[Stacchiola, Dario] Michigan Technol Univ, Dept Chem, Houghton, MI 49931 USA.
[Evans, Jaime; Perez, Manuel] Cent Univ Venezuela, Fac Ciencias, Caracas 1020A, Venezuela.
RP Rodriguez, JA (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
EM rodrigez@bnl.gov
RI Estrella, Michael/G-3188-2010; Stacchiola, Dario/B-1918-2009; Barrio,
Laura/A-9509-2008; Hrbek, Jan/I-1020-2013; Senanayake,
Sanjaya/D-4769-2009
OI Stacchiola, Dario/0000-0001-5494-3205; Barrio,
Laura/0000-0003-3496-4329; Senanayake, Sanjaya/0000-0003-3991-4232
FU US Department of Energy, Office of Basic Energy Sciences
[DE-AC02-98CH10886]; INTEVEP; IDB
FX The work performed at BNL was supported by the US Department of Energy,
Office of Basic Energy Sciences, under Contract DE-AC02-98CH10886. J.E.
and M.P. are grateful to INTEVEP and IDB for partial support of the work
carried out at the UCV.
NR 37
TC 69
Z9 70
U1 13
U2 102
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9517
J9 J CATAL
JI J. Catal.
PD MAY 4
PY 2010
VL 271
IS 2
BP 392
EP 400
DI 10.1016/j.jcat.2010.02.024
PG 9
WC Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 603XD
UT WOS:000278240500024
ER
PT J
AU Zhao, C
Wang, YH
Yang, Q
Fu, R
Cunnold, D
Choi, Y
AF Zhao, Chun
Wang, Yuhang
Yang, Qing
Fu, Rong
Cunnold, Derek
Choi, Yunsoo
TI Impact of East Asian summer monsoon on the air quality over China: View
from space
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID TROPOSPHERIC EMISSION SPECTROMETER; CHEMICAL-TRANSPORT MODEL;
CONVECTIVE-TRANSPORT; CARBON-MONOXIDE; OZONE; POLLUTION; TES;
SIMULATIONS; SATELLITE; CHEMISTRY
AB Tropospheric O-3 columns retrieved from Ozone Monitoring Instrument and Microwave Limb Sounder measurements, CO columns retrieved from Measurements of Pollution in the Troposphere, and tropospheric O-3 and CO concentrations retrieved from the Tropospheric Emission Spectrometer from May to August in 2006 are analyzed using the Regional Chemical and Transport Model to investigate the impact of the East Asian summer monsoon on the air quality over China. The observed and simulated migrations of O-3 and CO are in good agreement, demonstrating that the summer monsoon significantly affects the air quality over southeastern China, and this influence extends to central East China from June to July. Enhancements of CO and O-3 over southeastern China disappear after the onset of the summer monsoon and reemerge in August after the monsoon wanes. The premonsoon high O-3 concentrations over southern China are due to photochemical production from pollutant emissions and the O-3 transport from the stratosphere. In the summer monsoon season, the O-3 concentrations are relatively low over monsoon-affected regions because of the transport of marine air masses and weak photochemical activity. We find that the monsoon system strongly modulates the pollution problem over a large portion of East China in summer, depending on its strength and tempo-spatial extension. Model results also suggest that transport from the stratosphere and long-range transport from East China and South/central Asia all make significant contributions to O-3 enhancements over West China. Satellite observations provide valuable information for investigating the monsoon impact on air quality, particularly for the regions with limited in situ measurements.
C1 [Zhao, Chun] Pacific NW Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99354 USA.
[Choi, Yunsoo] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Fu, Rong] Univ Texas Austin, Jackson Sch Geosci, Austin, TX 78712 USA.
[Zhao, Chun; Wang, Yuhang; Yang, Qing; Cunnold, Derek] Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA.
RP Zhao, C (reprint author), Pacific NW Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99354 USA.
EM chun.zhao@pnl.gov
RI Yang, Qing/H-3275-2011; Zhao, Chun/A-2581-2012; Fu, Rong/B-4922-2011;
Wang, Yuhang/B-5578-2014
OI Yang, Qing/0000-0003-2067-5999; Zhao, Chun/0000-0003-4693-7213;
FU National Science Foundation; NASA
FX This work was supported by the National Science Foundation Atmospheric
Chemistry Program and the NASA Atmospheric Chemistry Modeling and
Analysis Program. The GEOS-CHEM model is managed at Harvard University
with support from the NASA Atmospheric Chemistry Modeling and Analysis
Program.
NR 57
TC 35
Z9 35
U1 1
U2 25
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD MAY 4
PY 2010
VL 115
AR D09301
DI 10.1029/2009JD012745
PG 12
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 593RQ
UT WOS:000277478300002
ER
PT J
AU Wilson, RJ
Tokar, RL
Kurth, WS
Persoon, AM
AF Wilson, R. J.
Tokar, R. L.
Kurth, W. S.
Persoon, A. M.
TI Properties of the thermal ion plasma near Rhea as measured by the
Cassini plasma spectrometer
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
AB Rhea is the second largest Saturnian satellite orbiting at 8.74 Saturn radii within the magnetosphere's near corotating thermal plasma. Rhea's orbital speed is less than the corotation speed, so the thermal plasma forms a wake in the direction of Rhea's orbital motion. During 26 November 2005, Cassini passed within 500 km of Rhea and through this wake, with a subsequent flyby an order of magnitude higher on 30 August 2007. The thermal plasma moments during these encounters are investigated here utilizing the Ion Mass Spectrometer (IMS) sensor of Cassini and analyzed by a forward model technique. Owing to the brevity of flybys, IMS is only able to sample a single slice of phase space at high time resolution throughout, rather than actuating to allow sampling of a variety of pitch angles but only providing a few data points. Even with this restriction, the moments before/after the encounter are in good agreement with other nonflyby actuating calculated moments. It is found that the plasma is dominated by water ions, with plasma velocities approximate to 30% slower than would be expected by rigid corotation, and local plasma densities decrease when passing through the wake. During the encounters, the results show that on the Saturn side of Rhea, there is no radial component of plasma flow, yet there is a radial component of approximate to 10 km/s outward on the anti-Saturn side.
C1 [Wilson, R. J.] Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80302 USA.
[Wilson, R. J.; Tokar, R. L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Kurth, W. S.; Persoon, A. M.] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA.
RP Wilson, RJ (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM Rob.Wilson@lasp.colorado.edu
RI Wilson, Rob/C-2689-2009;
OI Wilson, Rob/0000-0001-9276-2368; Kurth, William/0000-0002-5471-6202
FU JPL [1243218]; NASA [1356500]
FX The work at Los Alamos was performed under the auspices of the U.S. DOE
and was supported by the NASA Cassini program. The ion mass spectrometer
is a component of the Cassini Plasma Spectrometer and was supported by
JPL contract 1243218 with Southwest Research Institute. Cassini is
managed by the Jet Propulsion Laboratory for NASA. The research at The
University of Iowa is supported by NASA through contract 1356500 with
the Jet Propulsion Laboratory.
NR 10
TC 14
Z9 14
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD MAY 4
PY 2010
VL 115
AR A05201
DI 10.1029/2009JA014679
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 593SI
UT WOS:000277480500002
ER
PT J
AU Melnichenko, YB
Mayama, H
Cheng, G
Blach, T
AF Melnichenko, Yuri B.
Mayama, H.
Cheng, G.
Blach, T.
TI Monitoring Phase Behavior of Sub- and Supercritical CO2 Confined in
Porous Fractal Silica with 85% Porosity
SO LANGMUIR
LA English
DT Article
ID ANGLE NEUTRON-SCATTERING; ADSORPTION; SORPTION; SYSTEMS; ROCKS; COALS;
GAS
AB Phase behavior of CO2 confined in porous fractal silica with volume fraction of SiO2 phi(s) = 0.15 was investigated using small-angle neutron scattering (SANS) and ultrasmall-angle neutron scattering (USANS) techniques. The range of fluid densities (0 < (rho(CO2))(bulk) < 0.977 g/cm(3)) and temperatures (T = 22 degrees C, 35 and 60 degrees C) corresponded to gaseous, liquid, near critical and supercritical conditions of the bulk fluid. The results revealed formation of a dense adsorbed phase in small pores with sizes D < 40 angstrom at all temperatures. At low pressure (P < 55 bar, (rho(CO2))(bulk) < 0.2 g/cm(3)) the average fluid density in pores may exceed the density of bulk fluid by a factor up to 6.5 at T = 22 degrees C. This "enrichment factor" gradually decreases with temperature, however significant fluid densification in small pores still exists at temperature T = 60 degrees C, i.e., far above the liquid gas critical temperature of bulk CO2 (T-C = 31.1 degrees C). Larger pores are only partially filled with liquid-like adsorbed layer which coexists with unadsorbed fluid in the pore core. With increasing pressure, all pores become uniformly filled with the fluid, showing no measurable enrichment or depletion of the porous matrix with CO2.
C1 [Melnichenko, Yuri B.] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
[Mayama, H.] Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido 0010021, Japan.
[Cheng, G.] Joint Bioenergy Inst, Emeryville, CA 94608 USA.
[Blach, T.] Griffith Univ, Nanoscale Sci & Technol Ctr, Brisbane, Qld 4111, Australia.
RP Melnichenko, YB (reprint author), Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
EM melnichenko@ornl.gov
FU Laboratory Directed Research and Development Program; Scientific User
Facilities Division, Office of Basic Energy Sciences, U.S. Department of
Energy; National Institute of Standards and Technology; U.S. Department
of Commerce; Ministry of Education, Culture, Sports, Science, and
Technology of Japan [18710089]
FX The authors wish to thank D. Mildner for his help during USANS
experiments and also A. P. Radlinski for careful reading the manuscript
and helpful remarks. This Research at Oak Ridge National Laboratory's
High Flux Isotope Reactor was sponsored by the Laboratory Directed
Research and Development Program and the Scientific User Facilities
Division, Office of Basic Energy Sciences, U.S. Department of Energy. We
acknowledge the support of the National Institute of Standards and
Technology, U.S. Department of Commerce, in providing the neutron
research facilities used in this work. H.M. acknowledges support from
the Ministry of Education, Culture, Sports, Science, and Technology of
Japan (Grant-in-Aids for Young Scientists No. 18710089.
NR 24
TC 10
Z9 10
U1 1
U2 20
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD MAY 4
PY 2010
VL 26
IS 9
BP 6374
EP 6379
DI 10.1021/la904032p
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 587DV
UT WOS:000276969700048
PM 20043698
ER
PT J
AU Robinson, DB
Wu, CAM
Ong, MD
Jacobs, BW
Pierson, BE
AF Robinson, David B.
Wu, Chung-An Max
Ong, Markus D.
Jacobs, Benjamin W.
Pierson, Bonnie E.
TI Effect of Electrolyte and Adsorbates on Charging Rates in Mesoporous
Gold Electrodes
SO LANGMUIR
LA English
DT Article
ID CARBON AEROGEL ELECTRODES; SELF-ASSEMBLED MONOLAYERS; DOUBLE-LAYER
CAPACITORS; ELECTRICAL DOUBLE-LAYER; POROUS-ELECTRODES; PERCHLORIC-ACID;
ZERO CHARGE; ELECTROCHEMICAL CAPACITORS; THIOL MONOLAYERS; FILM
ELECTRODES
AB The classical model for porous electrodes reported by De Levie several decades ago (and expanded upon since then) was developed mainly to describe pores with micrometer-scale diameters. Presumably it will break down as pore diameters approach atomic dimensions. Mesoporous gold formed by dealloying is a valuable test platform for this because its 10 inn pores are on the boundary of this expected breakdown and because the electrochemical and surface properties of gold are relatively well understood. The De Levie model works or these electrodes at high salt concentrations, but under dilute conditions, there is not enough salt locally to charge the interface, increasing real impedance on intermediate time scales. Specific adsorption on pore walls can cause a similar increase and also cause an effective mobility decrease, tunable through electrolyte choice and the use of alkanethiol monolayers. These effects are not expected in micrometer-scale pores and are important considerations when designing devices with nanoporous electrodes.
C1 [Robinson, David B.; Wu, Chung-An Max; Ong, Markus D.; Jacobs, Benjamin W.] Sandia Natl Labs, Livermore, CA 94551 USA.
[Pierson, Bonnie E.] N Carolina State Univ, Raleigh, NC 27695 USA.
RP Robinson, DB (reprint author), Sandia Natl Labs, POB 969, Livermore, CA 94551 USA.
EM drobins@sandia.gov
FU United States Department of Energy's National Nuclear Security
Administration [DE-AC04-94AL85000]; National Science Foundation
FX This work was performed under the Laboratory-Directed Research and
Development program at Sandia National Laboratories, a multiprogram
laboratory operated by Sandia Corporation, a Lockheed Martin Company,
for the United States Department of Energy's National Nuclear Security
Administration under Contract DE-AC04-94AL85000. B.E.P. was supported by
the National Science Foundation in partnership with the Sandia LDRD
program.
NR 63
TC 10
Z9 10
U1 1
U2 18
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD MAY 4
PY 2010
VL 26
IS 9
BP 6797
EP 6803
DI 10.1021/la903816f
PG 7
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 587DV
UT WOS:000276969700106
PM 20356029
ER
PT J
AU Tang, YL
Achyuthan, KE
Whitten, DG
AF Tang, Yanli
Achyuthan, Komandoor E.
Whitten, David G.
TI Label-free and Real-Time Sequence Specific DNA Detection Based on
Supramolecular Self-assembly
SO LANGMUIR
LA English
DT Article
ID HUMAN-IMMUNODEFICIENCY-VIRUS; CATIONIC CONJUGATED POLYMERS; NUCLEIC-ACID
PROBES; ELECTROCHEMICAL BIOSENSOR; CIRCULAR-DICHROISM; HYBRIDIZATION;
IMMOBILIZATION; NANOPARTICLES; RECOGNITION; SELECTIVITY
AB A new label-free, optical method was developed to detect sequence-specific DNA based on supramolecular self-assembly. A cationic phenylene ethynylene oligomer with two pairs of positively charged side chains (OPE-2) can form a J-dimer or J-aggregate with negatively charged DNA by a combination of electrostatic and hydrophobic interactions. At mu M concentrations of dsDNA (number of bases in ssDNA ranges from 8 to 32), the optimum supramolecular self-assembly occurs between OPE-2 and dsDNA and is characterized by a new absorption peak emerging, at 418 am and an increase in fluorescence intensity (about 4.5-fold for dsDNA(1)). In contrast, the self-assembled complexes between OPE-2 and ssDNA are less readily formed under the same conditions. Interestingly, the induced circular dichroism (CD) signal for OPE-2/ssDNA is quite strong, likely owing to the self-assembly onto ssDNA simultaneously templating helix formation. In contrast, the induced CD signal for OPE-2/dsDNA is weak, likely because the dsDNA is in a double helix conformation, and OPE-2 associated with the dsDNA should be outside of the helix. In fact, there is a steady decrease in the induced CD signal for ssDNA with the addition of equimolar complementary ssDNA over time that allows the monitoring of DNA hybridization in real time. Introduction of mismatched bases into the target DNA sequence prevents the full hybridization between ssDNA and the target DNA. For these cases, the decrease in the induced CD signals occurs more slowly and to a lesser extent, as sonic of the unhybridized portions may remain in helical association with OPE-2. In view of these observed signal changes, sequence specific DNA and single nucleotide mismatch can be detected in a very simple and sensitive manner without any modification of the DNA.
C1 [Tang, Yanli; Whitten, David G.] Univ New Mexico, Ctr Biomed Engn, Albuquerque, NM 87131 USA.
[Tang, Yanli; Whitten, David G.] Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA.
[Achyuthan, Komandoor E.] Sandia Natl Labs, Biosensors & Nanomat Dept, Albuquerque, NM 87185 USA.
RP Whitten, DG (reprint author), Univ New Mexico, Ctr Biomed Engn, Albuquerque, NM 87131 USA.
RI Tang, Yanli/F-9636-2015
FU Defense Threat Reduction Agency Joint Science and Technology Office
(DTRA-JSTO) [MIPR9-FO89XR052-0, AA07CBT008, MIPR9FO89XR076,
HDTRA1-07-BRCWMD]
FX We thank the Defense Threat Reduction Agency Joint Science and
Technology Office (DTRA-JSTO) for funding these investigations through
Project No. MIPR9-FO89XR052-0, Contract AA07CBT008 (DGW), Project No.
MIPR9FO89XR076, Contract AA07CBT008(KEA), and through Grant No.
HDTRA1-07-BRCWMD.
NR 45
TC 10
Z9 10
U1 2
U2 22
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD MAY 4
PY 2010
VL 26
IS 9
BP 6832
EP 6837
DI 10.1021/la904008v
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 587DV
UT WOS:000276969700111
PM 20030336
ER
PT J
AU Lynch, RM
Naswa, S
Rogers, GL
Kania, SA
Das, S
Chesler, EJ
Saxton, AM
Langston, MA
Voy, BH
AF Lynch, Rachel M.
Naswa, Sudhir
Rogers, Gary L., Jr.
Kania, Stephen A.
Das, Suchita
Chesler, Elissa J.
Saxton, Arnold M.
Langston, Michael A.
Voy, Brynn H.
TI Identifying genetic loci and spleen gene coexpression networks
underlying immunophenotypes in BXD recombinant inbred mice
SO PHYSIOLOGICAL GENOMICS
LA English
DT Article
DE quantitative trait loci; quantitative trait transcript; eQTL; CD4:CD8
ratio; T:B cell ratio; T lymphocytes; B lymphocytes; Ptprk; Acp1
ID PROTEIN-TYROSINE-PHOSPHATASE; WEIGHT PHOSPHOTYROSINE PHOSPHATASE;
QUANTITATIVE TRAIT LOCI; CD8(+) T-CELLS; R-PTP-KAPPA;
RHEUMATOID-ARTHRITIS; MATURATIONAL ARREST; LINEAGE COMMITMENT;
IMMUNE-RESPONSES; EXPRESSION
AB Lynch RM, Naswa S, Rogers GL Jr, Kania SA, Das S, Chesler EJ, Saxton AM, Langston MA, Voy BH. Identifying genetic loci and spleen gene coexpression networks underlying immunophenotypes in BXD recombinant inbred mice. Physiol Genomics 41: 244-253, 2010. First published February 23, 2010; doi:10.1152/physiolgenomics.00020.2010.-The immune system plays a pivotal role in the susceptibility to and progression of a variety of diseases. Due to a strong genetic basis, heritable differences in immune function may contribute to differential disease susceptibility between individuals. Genetic reference populations, such as the BXD (C57BL/6J X DBA/2J) panel of recombinant inbred (RI) mouse strains, provide unique models through which to integrate baseline phenotypes in healthy individuals with heritable risk for disease because of the ability to combine data collected from these populations across both multiple studies and time. We performed basic immunophenotyping (e. g., percentage of circulating B and T lymphocytes and CD4(+) and CD8(+) T cell subpopulations) in peripheral blood of healthy mice from 41 BXD RI strains to define the immunophenotypic variation in this strain panel and to characterize the genetic architecture that underlies these traits. Significant QTL models that explained the majority (50-77%) of phenotypic variance were derived for each trait and for the T: B cell and CD4(+):CD8(+) ratios. Combining QTL mapping with spleen gene expression data uncovered two quantitative trait transcripts, Ptprk and Acp1, as candidates for heritable differences in the relative abundance of helper and cytotoxic T cells. These data will be valuable in extracting genetic correlates of the immune system in the BXD panel. In addition, they will be a useful resource for prospective, phenotype-driven model selection to test hypotheses about differential disease or environmental susceptibility between individuals with baseline differences in the composition of the immune system.
C1 [Lynch, Rachel M.; Das, Suchita; Chesler, Elissa J.; Voy, Brynn H.] Oak Ridge Natl Lab, Syst Genet Grp, Oak Ridge, TN USA.
[Naswa, Sudhir; Rogers, Gary L., Jr.; Langston, Michael A.] Univ Tennessee, Dept Elect Engn, Knoxville, TN USA.
[Naswa, Sudhir; Rogers, Gary L., Jr.; Langston, Michael A.] Univ Tennessee, Dept Comp Sci, Knoxville, TN 37996 USA.
[Kania, Stephen A.] Univ Tennessee, Dept Comparat Med, Knoxville, TN 37996 USA.
[Chesler, Elissa J.] Jackson Lab, Bar Harbor, ME 04609 USA.
[Saxton, Arnold M.; Voy, Brynn H.] Univ Tennessee, Dept Anim Sci, Knoxville, TN 37901 USA.
RP Voy, BH (reprint author), 201E McCord Hall,2640 Morgan Circle Dr, Knoxville, TN 37996 USA.
EM bhvoy@utk.edu
RI Langston, Michael/A-9484-2011;
OI Kania, Stephen/0000-0002-4490-7347
FU Office of Biological and Environmental Research, Office of Science,
Department of Energy [ERKP650, ERKP804]
FX The project was supported by the Low Dose Radiation Research Program of
the Office of Biological and Environmental Research, Office of Science,
Department of Energy ERKP650 and ERKP804.
NR 86
TC 3
Z9 3
U1 1
U2 3
PU AMER PHYSIOLOGICAL SOC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA
SN 1094-8341
J9 PHYSIOL GENOMICS
JI Physiol. Genomics
PD MAY 4
PY 2010
VL 41
IS 3
BP 244
EP 253
DI 10.1152/physiolgenomics.00020.2010
PG 10
WC Cell Biology; Genetics & Heredity; Physiology
SC Cell Biology; Genetics & Heredity; Physiology
GA 591OL
UT WOS:000277310500005
PM 20179155
ER
PT J
AU Herrera, M
Roberts, DC
Gulbahce, N
AF Herrera, Mark
Roberts, David C.
Gulbahce, Natali
TI Mapping the Evolution of Scientific Fields
SO PLOS ONE
LA English
DT Article
ID COMPLEX NETWORKS; COMMUNITY STRUCTURE; PREDICTION; SCIENCE; MAPS
AB Despite the apparent cross-disciplinary interactions among scientific fields, a formal description of their evolution is lacking. Here we describe a novel approach to study the dynamics and evolution of scientific fields using a network-based analysis. We build an idea network consisting of American Physical Society Physics and Astronomy Classification Scheme (PACS) numbers as nodes representing scientific concepts. Two PACS numbers are linked if there exist publications that reference them simultaneously. We locate scientific fields using a community finding algorithm, and describe the time evolution of these fields over the course of 1985-2006. The communities we identify map to known scientific fields, and their age depends on their size and activity. We expect our approach to quantifying the evolution of ideas to be relevant for making predictions about the future of science and thus help to guide its development.
C1 [Herrera, Mark] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
[Herrera, Mark] Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA.
[Roberts, David C.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM USA.
[Roberts, David C.] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
[Gulbahce, Natali] Northeastern Univ, Dept Phys, Boston, MA 02115 USA.
[Gulbahce, Natali] Northeastern Univ, Ctr Complex Networks Res, Boston, MA 02115 USA.
[Gulbahce, Natali] Dana Farber Canc Inst, Ctr Canc Syst Biol, Boston, MA 02115 USA.
RP Herrera, M (reprint author), Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
EM dcr@lanl.gov; natali.gulbahce@gmail.com
RI Herrera, Mark/I-2446-2012
FU Center for Nonlinear Studies at Los Alamos National Laboratory; Los
Alamos Physics Summer School; Feynman Fellowship; National Institutes of
Health [P50HG004233]
FX All authors were partially funded by the Center for Nonlinear Studies at
Los Alamos National Laboratory. MH was also funded by the Los Alamos
Physics Summer School, DCR was funded by the Feynman Fellowship, and NG
was funded in part by National Institutes of Health grant P50HG004233.
The funders had no role in study design, data collection and analysis,
decision to publish, or preparation of the manuscript.
NR 27
TC 15
Z9 15
U1 1
U2 14
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD MAY 4
PY 2010
VL 5
IS 5
AR e10355
DI 10.1371/journal.pone.0010355
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 591MQ
UT WOS:000277305300002
PM 20463949
ER
PT J
AU Zhou, H
Yacoby, Y
Butko, VY
Logvenov, G
Bozovic, I
Pindak, R
AF Zhou, Hua
Yacoby, Yizhak
Butko, Vladimir Y.
Logvenov, Gennady
Bozovic, Ivan
Pindak, Ron
TI Anomalous expansion of the copper-apical-oxygen distance in
superconducting cuprate bilayers
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE complex oxide; epitaxial film; interface superconductivity;
phase-retrieval; surface diffraction
ID OXIDE SUPERCONDUCTORS; CRITICAL-TEMPERATURE
AB We have introduced an improved x-ray phase-retrieval method with unprecedented speed of convergence and precision, and used it to determine with sub-Angstrom resolution the complete atomic structure of epitaxial La2-xSrxCuO4 ultrathin films. We focus on superconducting heterostructures built from constituent materials that are not superconducting in bulk samples. Single-phase metallic or superconducting films are also studied for comparison. The results show that this phase-retrieval diffraction method enables accurate measurement of structural modifications in near-surface layers, which may be critically important for elucidation of surface-sensitive experiments. Specifically we find that, while the copper-apical-oxygen distance remains approximately constant in single-phase films, it shows a dramatic increase from the metallic-insulating interface of the bilayer towards the surface by as much as 0.45 angstrom. The apical-oxygen displacement is known to have a profound effect on the superconducting transition temperature.
C1 [Zhou, Hua; Butko, Vladimir Y.; Logvenov, Gennady; Bozovic, Ivan; Pindak, Ron] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Yacoby, Yizhak] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel.
RP Pindak, R (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM pindak@bnl.gov
FU Department of Energy [MA-509-MACA, DE-AC02-98CH10886, DE-AC02-06CH11357]
FX Y.Y. would like to acknowledge fruitful discussions with M. Bjorck. This
work was supported by the Department of Energy grant MA-509-MACA,
Contract No. DE-AC02-98CH10886, and use of the Advanced Photon Source
under Contract No. DE-AC02-06CH11357.
NR 20
TC 29
Z9 29
U1 3
U2 29
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD MAY 4
PY 2010
VL 107
IS 18
BP 8103
EP 8107
DI 10.1073/pnas.0914702107
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 591OK
UT WOS:000277310400013
PM 20404212
ER
PT J
AU Bar, M
Barreau, N
Couzinie-Devy, F
Pookpanratana, S
Klaer, J
Blum, M
Zhang, Y
Yang, W
Denlinger, JD
Schock, HW
Weinhardt, L
Kessler, J
Heske, C
AF Baer, M.
Barreau, N.
Couzinie-Devy, F.
Pookpanratana, S.
Klaer, J.
Blum, M.
Zhang, Y.
Yang, W.
Denlinger, J. D.
Schock, H. -W.
Weinhardt, L.
Kessler, J.
Heske, C.
TI Nondestructive depth-resolved spectroscopic investigation of the heavily
intermixed In2S3/Cu(In,Ga)Se-2 interface
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID FILM SOLAR-CELLS; SULFIDE BUFFER LAYERS; IN2S3; DEPOSITION; ALCVD; PVD;
CU
AB The chemical structure of the interface between a nominal In2S3 buffer and a Cu(In,Ga)Se-2 (CIGSe) thin-film solar cell absorber was investigated by soft x-ray photoelectron and emission spectroscopy. We find a heavily intermixed, complex interface structure, in which Cu diffuses into (and Na through) the buffer layer, while the CIGSe absorber surface/interface region is partially sulfurized. Based on our spectroscopic analysis, a comprehensive picture of the chemical interface structure is proposed. (C) 2010 American Institute of Physics. [doi:10.1063/1.3425739]
C1 [Baer, M.; Klaer, J.; Schock, H. -W.] Mat & Energie GmbH, Helmholtz Zentrum Berlin, D-14109 Berlin, Germany.
[Yang, W.; Denlinger, J. D.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source ALS, Berkeley, CA 94720 USA.
[Blum, M.; Weinhardt, L.] Univ Wurzburg, D-97074 Wurzburg, Germany.
[Baer, M.; Pookpanratana, S.; Blum, M.; Zhang, Y.; Heske, C.] Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA.
[Barreau, N.; Couzinie-Devy, F.; Kessler, J.] Univ Nantes, CNRS, Inst Mat Jean Rouxel IMN, UMR 6502, F-44322 Nantes 3, France.
RP Bar, M (reprint author), Mat & Energie GmbH, Helmholtz Zentrum Berlin, Lise Meitner Campus,Hahn Meitner Pl 1, D-14109 Berlin, Germany.
EM marcus.baer@helmholtz-berlin.de; nicolas.barreau@univ-nantes.fr;
heske@unlv.nevada.edu
RI Weinhardt, Lothar/G-1689-2013; Yang, Wanli/D-7183-2011
OI Yang, Wanli/0000-0003-0666-8063
FU Department of Energy, Basic Energy Sciences [DE-AC02-05CH11231]
FX The ALS is supported by the Department of Energy, Basic Energy Sciences,
Contract No. DE-AC02-05CH11231.
NR 25
TC 12
Z9 13
U1 2
U2 13
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAY 3
PY 2010
VL 96
IS 18
AR 184101
DI 10.1063/1.3425739
PG 3
WC Physics, Applied
SC Physics
GA 592ZY
UT WOS:000277422000062
ER
PT J
AU Ban, KY
Bremner, SP
Liu, GM
Dahal, SN
Dippo, PC
Norman, AG
Honsberg, CB
AF Ban, Keun-Yong
Bremner, Stephen P.
Liu, Guangming
Dahal, Som N.
Dippo, Patricia C.
Norman, Andrew G.
Honsberg, Christiana B.
TI Use of a GaAsSb buffer layer for the formation of small, uniform, and
dense InAs quantum dots
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE atomic force microscopy; buffer layers; III-V semiconductors; indium
compounds; photoluminescence; semiconductor growth; semiconductor
quantum dots
ID MOLECULAR-BEAM EPITAXY; OPTICAL-PROPERTIES; GROWTH; ISLANDS; WELLS;
MODEL; SIZE; BAND
AB InAs quantum dots grown on GaAsSb buffer layers with varying Sb content have been studied. Atomic force microscopy results show that the dot size is reduced as the Sb content increases with a concomitant increase in number density. Analysis of the size distribution indicates that the spread of dot sizes narrows with increasing Sb content. This is confirmed by photoluminescence measurements showing a significant narrowing of the dot emission peak for a GaAs(0.77)Sb(0.23) buffer compared to a GaAs buffer. The results are attributed to the strained buffer reducing interactions between dots and the Sb acting as a surfactant. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3409691]
C1 [Ban, Keun-Yong; Dahal, Som N.; Honsberg, Christiana B.] Arizona State Univ, Dept Elect Engn, Tempe, AZ 85287 USA.
[Bremner, Stephen P.] Univ Delaware, Dept Elect & Comp Engn, Newark, DE 19716 USA.
[Liu, Guangming] Univ Delaware, Dept Mat Sci & Engn, Newark, DE 19716 USA.
[Dippo, Patricia C.; Norman, Andrew G.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Ban, KY (reprint author), Arizona State Univ, Dept Elect Engn, Tempe, AZ 85287 USA.
EM kban1@asu.edu
RI Norman, Andrew/F-1859-2010
OI Norman, Andrew/0000-0001-6368-521X
FU U.S. Department of Energy through EPSCoR [DE-FG02-07ER46359]
FX This work was partially supported by the U.S. Department of Energy
through EPSCoR Contract No. DE-FG02-07ER46359.
NR 21
TC 23
Z9 23
U1 0
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAY 3
PY 2010
VL 96
IS 18
AR 183101
DI 10.1063/1.3409691
PG 3
WC Physics, Applied
SC Physics
GA 592ZY
UT WOS:000277422000036
ER
PT J
AU Cheng, J
Vianco, PT
Li, JCM
AF Cheng, Jing
Vianco, Paul T.
Li, James C. M.
TI Hollow tin/chromium whiskers
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID TIN WHISKERS; GROWTH
AB Tin whiskers have been an engineering challenge for over five decades. The mechanism has not been agreed upon thus far. This experiment aimed to identify a mechanism by applying compressive stresses to a tin film evaporated on silicon substrate with an adhesion layer of chromium in between. A phenomenon was observed in which hollow whiskers grew inside depleted areas. Using focused ion beam, the hollow whiskers were found to contain both tin and chromium. At the bottom of the depleted areas, thin tin/tin oxide film remained over the chromium layer. It indicates that tin transport occurred along the interface between tin and chromium layers. (C) 2010 American Institute of Physics. [doi:10.1063/1.3419837]
C1 [Cheng, Jing; Li, James C. M.] Univ Rochester, Mat Sci Program, Rochester, NY 14627 USA.
[Vianco, Paul T.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Cheng, J (reprint author), Univ Rochester, Mat Sci Program, Rochester, NY 14627 USA.
EM jicheng@me.rochester.edu
FU Sandia National Laboratory; United States Department of Energy
[DE-AC04-94AL85000]
FX This research was supported by Sandia National Laboratory through the
efforts of P.T.V. Sandia is a multiprogram laboratory operated by Sandia
Corporation, a Lockheed Martin Co., for the United States Department of
Energy's National Nuclear Security Administration under Contract No.
DE-AC04-94AL85000. J.C. also wishes to thank Dr. Malcolm Thomas of
Cornell for his diligent work and invaluable help in the FIB fabrication
of hollow Sn whiskers. A great appreciation is for Dr. Brian McIntyre
upon his very kind assistance in TEM analysis.
NR 22
TC 13
Z9 13
U1 0
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAY 3
PY 2010
VL 96
IS 18
AR 184102
DI 10.1063/1.3419837
PG 3
WC Physics, Applied
SC Physics
GA 592ZY
UT WOS:000277422000063
ER
PT J
AU Choi, SG
Aspnes, DE
Fuchser, AL
Martinez-Tomas, C
Sanjose, VM
Levi, DH
AF Choi, S. G.
Aspnes, D. E.
Fuchser, A. L.
Martinez-Tomas, C.
Munoz Sanjose, V.
Levi, D. H.
TI Ellipsometric study of single-crystal gamma-InSe from 1.5 to 9.2 eV
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE critical points; dielectric function; ellipsometry; III-VI
semiconductors; indium compounds; Kramers-Kronig relations; optical
films; ultraviolet spectra
ID INDIUM SELENIDE; RECIPROCAL-SPACE; THIN-FILMS; SPECTRA; GASE;
REFLECTIVITY
AB We report the component E perpendicular to c of the pseudodielectric-function tensor <>=<>+i <> of gamma-phase single-crystal InSe, obtained from 1.5 to 9.2 eV by vacuum-ultraviolet spectroscopic ellipsometry with the sample at room temperature. Overlayer artifacts were reduced as far as possible by measuring fresh surfaces prepared by cleavage. Accurate critical-point energies of observed structures were obtained by a combined method of spectral analysis. (C) 2010 American Institute of Physics. [doi:10.1063/1.3420080]
C1 [Choi, S. G.; Levi, D. H.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Aspnes, D. E.] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA.
[Fuchser, A. L.] JA Woollam Co Inc, Lincoln, NE 68508 USA.
[Martinez-Tomas, C.; Munoz Sanjose, V.] Univ Valencia, Dept Fis Aplicada & Electromagnetismo, E-46100 Burjassot, Spain.
RP Choi, SG (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM sukgeun.choi@nrel.gov
RI Choi, Sukgeun/J-2345-2014; Martinez-Tomas, M. Carmen/L-6455-2014;
Munoz-Sanjose, Vicente/L-6206-2014
OI Martinez-Tomas, M. Carmen/0000-0003-1100-355X; Munoz-Sanjose,
Vicente/0000-0002-3482-6957
FU U.S. Department of Energy [DE-AC36-08GO28308]; Spanish Project
[MAT2007-66129]
FX This work was supported by the U.S. Department of Energy under Contract
No. DE-AC36-08GO28308. The work done at the Universitat de ValEncia was
supported in part by the Spanish Project under Grant No. MAT2007-66129.
NR 20
TC 10
Z9 10
U1 3
U2 15
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAY 3
PY 2010
VL 96
IS 18
AR 181902
DI 10.1063/1.3420080
PG 3
WC Physics, Applied
SC Physics
GA 592ZY
UT WOS:000277422000013
ER
PT J
AU Ellis, B
Sarmiento, T
Mayer, M
Zhang, BY
Harris, J
Haller, E
Vuckovic, J
AF Ellis, Bryan
Sarmiento, Tomas
Mayer, Marie
Zhang, Bingyang
Harris, James
Haller, Eugene
Vuckovic, Jelena
TI Electrically pumped photonic crystal nanocavity light sources using a
laterally doped p-i-n junction
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE electroluminescence; gallium arsenide; III-V semiconductors; indium
compounds; integrated optics; ion implantation; light sources;
nanophotonics; photonic crystals; semiconductor doping; semiconductor
junctions; semiconductor lasers; semiconductor quantum dots
ID LASER
AB A technique to electrically pump photonic crystal nanocavities using a lateral p-i-n junction is described. Ion implantation doping is used to form the junction, which under forward bias pumps a gallium arsenide photonic crystal nanocavity with indium arsenide quantum dots. Efficient cavity-coupled electroluminescence is demonstrated and the electrical characteristics of the diode are presented. The fabrication improvements necessary for making an electrically pumped nanocavity laser using a lateral junction are discussed. (C) 2010 American Institute of Physics. [doi:10.1063/1.3425663]
C1 [Ellis, Bryan; Zhang, Bingyang; Vuckovic, Jelena] Stanford Univ, Edward L Ginzton Lab, Stanford, CA 94305 USA.
[Sarmiento, Tomas; Harris, James] Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA.
[Mayer, Marie; Haller, Eugene] Univ Calif Berkeley, Lawrence Berkeley Lab, Mat Sci Div, Berkeley, CA 94720 USA.
[Mayer, Marie; Haller, Eugene] Univ Calif Berkeley, Dept Mat Sci, Berkeley, CA 94720 USA.
RP Ellis, B (reprint author), Stanford Univ, Edward L Ginzton Lab, Stanford, CA 94305 USA.
EM bryane@stanford.edu
OI Sarmiento, Tomas/0000-0002-9176-4094
FU Gould Foundation; Stanford Graduate Fellowship; NDSEG Fellowship;
Interconnect Focus Center; Focus Center Research Program (FCRP);
JST/SORST
FX The authors would like to acknowledge Peter Stone and Jeff Beeman for
help with ion implantation, and Professor Yoshihisa Yamamoto for help
with sample growth. Financial support for this work was provided by the
Gould Foundation, the Stanford Graduate Fellowship, and the NDSEG
Fellowship. The authors acknowledge the support of the Interconnect
Focus Center, one of six research centers funded under the Focus Center
Research Program (FCRP), a Semiconductor Research Corporation entity.
Financial assistance for B.Y.Z. was provided in part by JST/SORST.
NR 20
TC 28
Z9 28
U1 0
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAY 3
PY 2010
VL 96
IS 18
AR 181103
DI 10.1063/1.3425663
PG 3
WC Physics, Applied
SC Physics
GA 592ZY
UT WOS:000277422000003
ER
PT J
AU Han, WQ
Liu, ZX
Yu, HG
AF Han, Wei-Qiang
Liu, Zhenxian
Yu, Hua-Gen
TI Synthesis and optical properties of GaN/ZnO solid solution nanocrystals
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE gallium compounds; III-V semiconductors; II-VI semiconductors;
nanostructured materials; nitridation; Raman spectra; solid solutions;
surface hardening; transmission electron microscopy; ultraviolet
spectra; visible spectra; wide band gap semiconductors; X-ray
diffraction; zinc compounds
ID SOLUTION PHOTOCATALYST; RAMAN-SCATTERING; BAND-GAP; WATER
AB We devised a synthesis route to prepare narrow band gap GaN/ZnO solid solution nanocrystals via nitriding a homogeneous Ga-Zn-O nanoprecursor. The nanocrystals were characterized by several following methods: x-ray diffractometer, transmission electron microscopy, ultraviolet-visible diffuse reflection, and Raman spectroscopy. Here, we can control the composition of nanocrystals by the nitridation temperature. From 550 to 850 degrees C, the corresponding crystalline size varies from 6.1 to 27 nm. It has been demonstrated that the sample prepared at 650 degrees C had the narrowest band gap of 2.21 eV. Microstructural investigations show that the (101) surface is the predominantly exposed one for the GaN/ZnO solid solution nanocrystals. We also discuss the influence of chemical disorder based on the Raman spectra acquired. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3428393]
C1 [Han, Wei-Qiang] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
[Liu, Zhenxian] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA.
[Yu, Hua-Gen] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RP Han, WQ (reprint author), Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
EM whan@bnl.gov
RI Han, WQ/E-2818-2013; Yu, Hua-Gen/N-7339-2015
FU U.S. DOE [DE-AC02-98CH10886]
FX This work is supported by the U.S. DOE under Contract No.
DE-AC02-98CH10886.
NR 15
TC 23
Z9 23
U1 3
U2 32
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAY 3
PY 2010
VL 96
IS 18
AR 183112
DI 10.1063/1.3428393
PG 3
WC Physics, Applied
SC Physics
GA 592ZY
UT WOS:000277422000047
ER
PT J
AU Weinhardt, L
Bar, M
Pookpanratana, S
Morkel, M
Niesen, TP
Karg, F
Ramanathan, K
Contreras, MA
Noufi, R
Umbach, E
Heske, C
AF Weinhardt, L.
Baer, M.
Pookpanratana, S.
Morkel, M.
Niesen, T. P.
Karg, F.
Ramanathan, K.
Contreras, M. A.
Noufi, R.
Umbach, E.
Heske, C.
TI Sulfur gradient-driven Se diffusion at the CdS/CuIn(S,Se)(2) solar cell
interface
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE Auger electron spectra; buffer layers; cadmium compounds; copper
compounds; diffusion; electronic structure; gallium compounds; II-VI
semiconductors; indium compounds; interface states; semiconductor thin
films; solar cells; sulphur compounds; ternary semiconductors; thin film
devices; X-ray photoelectron spectra
ID BUFFER LAYERS; THIN-FILMS; EFFICIENCY; HETEROJUNCTION; CDS; PERFORMANCE;
CU(IN
AB The diffusion behavior of Se at the CdS/Cu(In,Ga)(S,Se)(2) thin film solar cell interface was investigated by x-ray photoelectron spectroscopy and x-ray excited Auger electron spectroscopy. Buffer/absorber structures with S/Se ratios between zero and three at the initial Cu(In,Ga)(S,Se)(2) surface were analyzed. Samples from a high-efficiency laboratory process (NREL) as well as from an industrial large-area process (AVANCIS) were investigated. We find selenium diffusion into the CdS buffer layer, the magnitude of which strongly depends on the S content at the absorber surface. The associated modification of the heterojunction partners has significant impact on the electronic structure at the interface. (C) 2010 American Institute of Physics. [doi:10.1063/1.3425666]
C1 [Weinhardt, L.; Morkel, M.; Umbach, E.] Univ Wurzburg, D-97074 Wurzburg, Germany.
[Baer, M.; Pookpanratana, S.; Heske, C.] Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA.
[Baer, M.] Helmholtz Zentrum Berlin Mat & Energie, D-14109 Berlin, Germany.
[Niesen, T. P.; Karg, F.] AVANCIS GmbH & Co KG, D-81739 Munich, Germany.
[Ramanathan, K.; Contreras, M. A.; Noufi, R.] NREL, Golden, CO 80401 USA.
[Umbach, E.] Karlsruhe Inst Technol, D-76021 Karlsruhe, Germany.
RP Weinhardt, L (reprint author), Univ Wurzburg, Hubland, D-97074 Wurzburg, Germany.
EM lothar.weinhardt@physik.uni-wuerzburg.de
RI Weinhardt, Lothar/G-1689-2013
FU National Renewable Energy Laboratory [XXL-5-44205-12]
FX We acknowledge funding by the National Renewable Energy Laboratory under
Subcontract No. XXL-5-44205-12.
NR 24
TC 8
Z9 8
U1 1
U2 16
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAY 3
PY 2010
VL 96
IS 18
AR 182102
DI 10.1063/1.3425666
PG 3
WC Physics, Applied
SC Physics
GA 592ZY
UT WOS:000277422000021
ER
PT J
AU Alexandropoulos, DI
Papatriantafyllopoulou, C
Aromi, G
Roubeau, O
Teat, SJ
Perlepes, SP
Christou, G
Stamatatos, TC
AF Alexandropoulos, Dimitris I.
Papatriantafyllopoulou, Constantina
Aromi, Guillem
Roubeau, Olivier
Teat, Simon J.
Perlepes, Spyros P.
Christou, George
Stamatatos, Theocharis C.
TI The Highest-Nuclearity Manganese/Oximate Complex: An Unusual
Mn-15(II/III) Cluster with an S=6 Ground State
SO INORGANIC CHEMISTRY
LA English
DT Article
ID SINGLE-MOLECULE MAGNETS; HIGH-SPIN MOLECULES; CHEMISTRY;
2-PYRIDINEALDOXIME
AB The synthesis, structure, and magnetochemical characterization of the largest manganese oxime cluster are reported. The Mn-15/2-pyridinealdoxime compound is mixed-valence (II/III) and possesses an irregular structural motif with a novel Mn/O core The oximato-bridged cluster exhibits an S = 6 ground state and a negative magnetoanisotropy
C1 [Papatriantafyllopoulou, Constantina; Christou, George] Univ Florida, Dept Chem, Gainesville, FL 32611 USA.
[Alexandropoulos, Dimitris I.; Perlepes, Spyros P.; Stamatatos, Theocharis C.] Univ Patras, Dept Chem, Patras 26504, Greece.
[Aromi, Guillem] Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain.
[Roubeau, Olivier] CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain.
[Roubeau, Olivier] Univ Zaragoza, E-50009 Zaragoza, Spain.
[Teat, Simon J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Christou, G (reprint author), Univ Florida, Dept Chem, Gainesville, FL 32611 USA.
RI Christou, George /A-3072-2014; Aromi, Guillem/I-2483-2015; Roubeau,
Olivier/A-6839-2010
OI Aromi, Guillem/0000-0002-0997-9484; Roubeau, Olivier/0000-0003-2095-5843
FU Office of Basic Energy Sciences, of the U.S. Department of Energy
[DE-AC02-05CH11231]; PYTHAGORAS [b 365 037]; National Science Foundation
[CHE-0910472]
FX G.A thanks the Spanish MCI (CTQ2009-06959) The Advanced Light Source is
supported by The Director, Office of Basic Energy Sciences, of the U.S.
Department of Energy under Contract DE-AC02-05CH11231 S P P thanks the
Operational and Vocational Training II (EPEAEK II) and particularly the
program PYTHAGORAS (Grant b 365 037) for funding of this research. G C.
thanks the National Science Foundation (Grant CHE-0910472) for support
of this work
NR 23
TC 26
Z9 26
U1 0
U2 8
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
J9 INORG CHEM
JI Inorg. Chem.
PD MAY 3
PY 2010
VL 49
IS 9
BP 3962
EP 3964
DI 10.1021/IC100267y
PG 3
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 586UN
UT WOS:000276939100002
PM 20377194
ER
PT J
AU Lehnert, N
Galinato, MGI
Paulat, F
Richter-Addo, GB
Sturhahn, W
Xu, N
Zhao, JY
AF Lehnert, Nicolai
Galinato, Mary Grace I.
Paulat, Florian
Richter-Addo, George B.
Sturhahn, Wolfgang
Xu, Nan
Zhao, Jiyong
TI Nuclear Resonance Vibrational Spectroscopy Applied to [Fe(OEP)(NO)]: The
Vibrational Assignments of Five-Coordinate Ferrous Heme-Nitrosyls and
Implications for Electronic Structure
SO INORGANIC CHEMISTRY
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; EFFECTIVE CORE POTENTIALS; PORPHYRIN
FORCE-FIELD; SOLUBLE GUANYLATE-CYCLASE; NITRIC-OXIDE SYNTHASES;
NORMAL-MODE ANALYSIS; NITROSATIVE STRESS; MOLECULAR CALCULATIONS; NICKEL
OCTAETHYLPORPHYRIN; S-NITROSYLATION
AB This study presents Nuclear Resonance Vibrational Spectroscopy (NRVS) data on the five-coordinate (5C) ferrous heme nitrosyl complex [Fe(OEP)(NO)] (1, OEP2- = octaethylporphyrinato dianion) and the corresponding (NO)-N-15-O-18 labeled complex. The obtained spectra identify two isotope sensitive features at 522 and 388 cm(-1), which shift to 508 and 381 cm(-1), respectively, upon isotope labeling These features are assigned to the Fe-NO stretch p(Fe-NO) and the in-plane Fe-N-O bending mode delta(rp)(Fe-N-O), the latter has been unambiguously assigned for the first time for 1 The obtained NRVS data were simulated using our quantum chemistry centered normal coordinate analysis (QCC-NCA) Since complex 1 can potentially exist in 12 different conformations involving the FeNO and peripheral ethyl onentations, extended density functional theory (OFT) calculations and QCC-NCA simulations were performed to determine how these conformations affect the NRVS properties of [Fe(OEP)NO] These results show that the properties and force constants of the FeNO unit are hardly affected by the conformational changes involving the ethyl substituents On the other hand, the NRVS-active porphynn-based vibrations around 340-360, 300-320, and 250-270 cm-1 are sensitive to the conformational changes. The spectroscopic changes observed in these regions are due to selective mechanical couplings of one component of E-0-type (in ideal Do symmetry) porphyrin-based vibrations with the in-plane Fe-N-O bending mode This leads to the observed variations in Fe(OEP) core mode energies and NRVS intensities without affecting the properties of the FeNO unit The QCC-NCA simulated NRVS spectra of 1 show excellent agreement with experiment, and indicate that conformer F is likely present in the samples of this complex investigated here. The observed porphynn-based vibrations in the NRVS spectra of 1 are also assigned based on the QCC-NCA results The obtained force constants of the Fe NO and N-O bonds are 283-2.94 (based on the OFT functional applied) and about 12.15 mdyn/angstrom, respectively. The electronic structures of 5C ferrous heme-nitrosyls in different model complexes are then analyzed, and variations in their properties based on different porphyrin substituents are explained. Finally, the shortcomings of different DFT functionals in describing the axial FeNO subunit in heme-nitrosyls are elucidated
C1 [Lehnert, Nicolai; Galinato, Mary Grace I.; Paulat, Florian] Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA.
[Richter-Addo, George B.; Xu, Nan] Univ Oklahoma, Dept Chem & Biochem, Norman, OK 73019 USA.
[Sturhahn, Wolfgang; Zhao, Jiyong] Argonne Natl Lab, APS XFD, Argonne, IL 60439 USA.
RP Lehnert, N (reprint author), Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA.
RI Xu, Nan/C-1107-2011
FU NIGMS NIH HHS [R01 GM064476, GM-064476, R01 GM064476-04]
NR 87
TC 29
Z9 29
U1 0
U2 8
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
EI 1520-510X
J9 INORG CHEM
JI Inorg. Chem.
PD MAY 3
PY 2010
VL 49
IS 9
BP 4133
EP 4148
DI 10.1021/IC902181e
PG 16
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 586UN
UT WOS:000276939100025
PM 20345089
ER
PT J
AU McClarren, RG
Hauck, CD
AF McClarren, Ryan G.
Hauck, Cory D.
TI Simulating radiative transfer with filtered spherical harmonics
SO PHYSICS LETTERS A
LA English
DT Article
DE Radiation transport; High energy density physics; Kinetic equations;
Spherical harmonics method
ID P-N EQUATIONS; TIME; HYDRODYNAMICS; TRANSPORT
AB This Letter presents a novel application of filters to the spherical harmonics (P(N)) expansion for radiative transfer problems in the high-energy-density regime. The filter, which is based on non-oscillatory spherical splines, preserves both the equilibrium diffusion limit and formal convergence properties of the unfiltered expansion. While the method requires further mathematical justification and computational studies, preliminary results demonstrate that solutions to the filtered P(N) equations are (1) more robust and less oscillatory than standard P(N) solutions and (2) more accurate than discrete ordinates solutions of comparable order. The filtered P(7) solution demonstrates comparable accuracy to an implicit Monte Carlo solution for a benchmark hohlraum problem. Given the benefits of this method we believe it will enable more routine use of high-fidelity radiation-hydrodynamics calculations in the simulation of physical systems. (C) 2010 Elsevier B.V. All rights reserved.
C1 [McClarren, Ryan G.] Texas A&M Univ, Inst Appl Math & Computat Sci, College Stn, TX 77843 USA.
[Hauck, Cory D.] Oak Ridge Natl Lab, Div Math & Comp Sci, Computat Math Grp, Oak Ridge, TN 37831 USA.
RP McClarren, RG (reprint author), Texas A&M Univ, Inst Appl Math & Computat Sci, College Stn, TX 77843 USA.
EM rgm@tamu.edu; hauckc@ornl.gov
NR 32
TC 7
Z9 7
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9601
J9 PHYS LETT A
JI Phys. Lett. A
PD MAY 3
PY 2010
VL 374
IS 22
BP 2290
EP 2296
DI 10.1016/j.physleta.2010.02.041
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 599AX
UT WOS:000277883400018
ER
PT J
AU Bar-Shalom, S
Eilam, G
Soni, A
AF Bar-Shalom, Shaouly
Eilam, Gad
Soni, Amarjit
TI Collider signals of a composite Higgs in the Standard Model with four
generations
SO PHYSICS LETTERS B
LA English
DT Article
DE SM4; Compositeness; Higgs; 4th generation; Flavor changing;
Cross-section
ID ELECTROWEAK SYMMETRY-BREAKING; NEUTRAL-CURRENT DECAYS; CP VIOLATION; 4TH
GENERATION; TOP-QUARK; BOSON; SPECTRUM; PARTICLE
AB Recent fits of electroweak precision data to the Standard Model (SM) with a 4th sequential family (SM4) point to a possible "three-prong composite solution": (1) the Higgs mass is at the TeV-scale, (2) the masses of the 4th family quarks t', b' are of O(500) GeV and (3) the mixing angle between the 4th and 3rd generation quarks is of the order of the Cabibbo angle, theta(34) similar to O(0.1). Such a manifestation of the SM4 is of particular interest as it may suggest that the Higgs is a composite state, predominantly of the 4th generation heavy quarks. Motivated by the above, we show that the three-prong composite solution to the SM4 can have interesting new implications for Higgs phenomenology. For example, the Higgs can decay to a single heavy 4th generation quark via the 3-body decays (through an off-shell t' or b') H -> (t) over bar 't'(star) -> (t) over bar 'bW(+) and H -> (b) over bar 'b'(star) -> (b) over bar 'tW(-). These flavor diagonal decays can be dramatically enhanced at the LHC (by several orders of magnitudes) due to the large width effects of the resonating heavy Higgs in the processes gg -> H -> (t) over bar 't'(star) -> (t) over bar 'bW(+) and gg -> H -> (b) over bar 'b'(star) -> (b) over bar 'tW(-), thus yielding a viable signal above the corresponding continuum QCD production rates. In addition, the Higgs can decay to a single t' and b' in the loop-generated flavor changing (FC) channels H -> b'(b) over bar, t'(t) over bar. These FC decays are essentially "GIM-free" and can, therefore, have branching ratios as large as 10(-4)-10(-3). (C) 2010 Elsevier B.V.. All rights reserved.
C1 [Bar-Shalom, Shaouly; Eilam, Gad] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel.
[Soni, Amarjit] Brookhaven Natl Lab, Theory Grp, Upton, NY 11973 USA.
RP Bar-Shalom, S (reprint author), Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel.
EM shaouly@physics.technion.ac.il; eilam@physics.technion.ac.il;
soni@bnl.gov
FU US DOE [DE-AC0298CH10886]; Technion
FX The research of AS is supported in part by the US DOE contract #
DE-AC0298CH10886 (BNL). SBS and GE acknowledge research support from the
Technion.
NR 59
TC 15
Z9 15
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD MAY 3
PY 2010
VL 688
IS 2-3
BP 195
EP 201
DI 10.1016/j.physletb.2010.03.061
PG 7
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 598HI
UT WOS:000277825600013
ER
PT J
AU Kintzel, EJ
Herwig, KW
Rols, S
AF Kintzel, E. J., Jr.
Herwig, K. W.
Rols, S.
TI Neutron diffraction study of p-phenylene oligomer molecules adsorbed
onto graphite
SO THIN SOLID FILMS
LA English
DT Article
DE Neutron scattering; Monolayers; Graphite; Optoelectronic devices;
p-Phenylene oligomers
ID STRUCTURAL PHASE-TRANSITION; THIN-FILMS; OPTICAL-PROPERTIES;
CRYSTAL-STRUCTURE; PARA-TERPHENYL; ALKANE FILMS; SIO2 SURFACE; GROWTH;
TEMPERATURE; QUATERPHENYL
AB Neutron scattering experiments have been carried out on low-coverage films of the aromatic p-phenylene oligomer molecules (p-nP. C(6n)H(10) (+) (4(n-2)), where n indicates the number of phenyl units per molecule) physisorbed onto the surface of graphite. The molecular arrangement within these films has been determined as a function of temperature, number of molecular layers, and molecular length. Analysis of the diffraction data reveals two-dimensional film structures consistent for molecules having their long-axis parallel to the underlying substrate. The experimental measurements provide evidence for a melting transition in a monolayer film and thermal expansion of a bilayer film of p-terphenyl (p-3P). The planes of the phenyl rings are approximately parallel to the substrate in the monolayer structure but rotate out of this plane by 60 +/- 20 degrees in the bilayer film of p-3P. As the number of phenyl units is increased from n = 3 to n = 6, bilayer structures are observed having similar packing arrangements of the molecules but with lattice parameters that scale with molecular length. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Kintzel, E. J., Jr.; Herwig, K. W.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Rols, S.] Univ Montpellier 2, F-34095 Montpellier 5, France.
RP Kintzel, EJ (reprint author), Western Kentucky Univ, Dept Phys & Astron, 1906 Coll Hts Blvd 11077, Bowling Green, KY 42101 USA.
EM edward.kintzel@wku.edu
RI Herwig, Kenneth/F-4787-2011; ROLS, Stephane/A-1609-2013
OI ROLS, Stephane/0000-0002-9892-816X
FU U.S. Department of Energy [DE-AC05-960R22464]; National Science
Foundation [DMR-0086210]; U.S. Department of Energy, Basic Energy
Sciences-Material Sciences [W-31-109-ENG-38]
FX The authors wish to thank Scientific Glassblower Joseph S. Gregar of the
Chemistry Division at Argonne National Laboratory for his assistance
with this project. This research was supported in part by the U.S.
Department of Energy Contract No. DE-AC05-960R22464 and the National
Science Foundation under Agreement No. DMR-0086210. The data in this
work were collected at the Intense Pulsed Neutron Source at Argonne
National Laboratory, supported by the U.S. Department of Energy, Basic
Energy Sciences-Material Sciences, under Contract No. W-31-109-ENG-38.
NR 33
TC 0
Z9 0
U1 0
U2 2
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD MAY 3
PY 2010
VL 518
IS 14
BP 3786
EP 3791
DI 10.1016/j.tsf.2010.01.001
PG 6
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 601MT
UT WOS:000278064600035
ER
PT J
AU Hofmeyr, S
Iancu, C
Blagojevic, F
AF Hofmeyr, Steven
Iancu, Costin
Blagojevic, Filip
TI Load Balancing on Speed
SO ACM SIGPLAN NOTICES
LA English
DT Article
DE Experimentation; Theory; Performance; Measurement; Languages; Design;
Parallel Programming; Operating System; Load Balancing; Speed Balancing;
Multicore; Multisocket
AB To fully exploit multicore processors, applications are expected to provide a large degree of thread-level parallelism. While adequate for low core counts and their typical workloads, the current load balancing support in operating systems may not be able to achieve efficient hardware utilization for parallel workloads. Balancing run queue length globally ignores the needs of parallel applications where threads are required to make equal progress. In this paper we present a load balancing technique designed specifically for parallel applications running on multicore systems. Instead of balancing run queue length, our algorithm balances the time a thread has executed on "faster" and "slower" cores. We provide a user level implementation of speed balancing on UMA and NUMA multi-socket architectures running Linux and discuss behavior across a variety of workloads, usage scenarios and programming models. Our results indicate that speed balancing when compared to the native Linux load balancing improves performance and provides good performance isolation in all cases considered. Speed balancing is also able to provide comparable or better performance than DWRR, a fair multi-processor scheduling implementation inside the Linux kernel. Furthermore, parallel application performance is often determined by the implementation of synchronization operations and speed balancing alleviates the need for tuning the implementations of such primitives.
C1 [Hofmeyr, Steven; Iancu, Costin; Blagojevic, Filip] Lawrence Berkeley Natl Lab, Berkeley, CA USA.
RP Hofmeyr, S (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA USA.
EM shofmeyr@lbl.gov; cciancu@lbl.gov; fblagojevic@lbl.gov
NR 32
TC 8
Z9 8
U1 0
U2 3
PU ASSOC COMPUTING MACHINERY
PI NEW YORK
PA 2 PENN PLAZA, STE 701, NEW YORK, NY 10121-0701 USA
SN 0362-1340
J9 ACM SIGPLAN NOTICES
JI ACM Sigplan Not.
PD MAY
PY 2010
VL 45
IS 5
BP 147
EP 157
PG 11
WC Computer Science, Software Engineering
SC Computer Science
GA 633ZX
UT WOS:000280548100014
ER
PT J
AU Li, GD
Gopalakrishnan, G
Kirby, RM
Dan, QL
AF Li, Guodong
Gopalakrishnan, Ganesh
Kirby, Robert M.
Dan Quinlan
TI A Symbolic Verifier for CUDA Programs
SO ACM SIGPLAN NOTICES
LA English
DT Article
DE Verification; CUDA; Formal Verification; Symbolic Analysis; SPMD
AB We present a preliminary automated verifier based on mechanical decision procedures which is able to prove functional correctness of CUDA programs and guarantee to detect bugs such as race conditions. We also employ a symbolic partial order reduction (POR) technique to mitigate the interleaving explosion problem.
C1 [Li, Guodong; Gopalakrishnan, Ganesh; Kirby, Robert M.] Univ Utah, Sch Comp, Salt Lake City, UT 84112 USA.
[Dan Quinlan] Lawrence Livermore Natl Lab, Livermore, CA USA.
RP Li, GD (reprint author), Univ Utah, Sch Comp, Salt Lake City, UT 84112 USA.
EM ligd@cs.utah.edu; ganesh@cs.utah.edu; kirby@cs.utah.edu;
dquinlan@llnl.gov
NR 6
TC 1
Z9 1
U1 0
U2 0
PU ASSOC COMPUTING MACHINERY
PI NEW YORK
PA 2 PENN PLAZA, STE 701, NEW YORK, NY 10121-0701 USA
SN 0362-1340
J9 ACM SIGPLAN NOTICES
JI ACM Sigplan Not.
PD MAY
PY 2010
VL 45
IS 5
BP 357
EP 358
PG 2
WC Computer Science, Software Engineering
SC Computer Science
GA 633ZX
UT WOS:000280548100046
ER
PT J
AU Wang, XL
Han, WQ
Chen, JJ
Graetz, J
AF Wang, Xiao-Liang
Han, Wei-Qiang
Chen, Jiajun
Graetz, Jason
TI Single-Crystal Intermetallic M-Sn (M = Fe, Cu, Co, Ni) Nanospheres as
Negative Electrodes for Lithium-Ion Batteries
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Article
DE FeSn(2); modified polyol process; cell performance; capacity;
electrochemical activity; solid electrolyte interface
ID ALLOYED SN-FE(-C) POWDERS; ANODE MATERIALS; ELECTROCHEMICAL REACTION;
IN-SITU; TIN; LI; NANOCRYSTALS; REACTIVITY; COMPOSITE; NANORODS
AB FeSn(2), Cu(6)Sn(5), CoSn(3), and Ni(3)Sn(4) single-crystalline nanospheres with a characteristic uniform particle size of similar to 40 nm have been synthesized via a modified polyol process, aiming at determining and understanding their intrinsic cycling performance as negative electrode materials for lithium-ion batteries. We find that, in this morphologically controlled condition, the reversible capacities follow FeSn(2) > Cu(6)Sn(5) approximate to CoSn(3) > Ni(3)Sn(4), which is not directly decided by their theoretical capacities or lithium-driven volume changes. FeSn(2) exhibits the best electrochemical activity among these intermetallic nanospheres and an effective solid electrolyte interface, which explains its superior cycling performance. The small particle dimension also improves cycling stability and Li(+) diffusion.
C1 [Wang, Xiao-Liang; Han, Wei-Qiang] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
[Chen, Jiajun; Graetz, Jason] Brookhaven Natl Lab, Energy Sci & Technol Dept, Upton, NY 11973 USA.
RP Han, WQ (reprint author), Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
EM whan@bnl.gov
RI Han, WQ/E-2818-2013
FU U.S. DOE [DE-AC02-98CH10886]; Brookhaven National Laboratory
FX This work is supported by the U.S. DOE under contract DE-AC02-98CH10886
and E-LDRD Fund of Brookhaven National Laboratory. We thank Jian Hong,
Feng Wang, Lihua Zhang, and Lijun Wu for their technical help and
valuable discussions.
NR 30
TC 61
Z9 61
U1 8
U2 99
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
J9 ACS APPL MATER INTER
JI ACS Appl. Mater. Interfaces
PD MAY
PY 2010
VL 2
IS 5
BP 1548
EP 1551
DI 10.1021/am100218v
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA 600HY
UT WOS:000277977400040
PM 20443576
ER
PT J
AU Coker, VS
Bennett, JA
Telling, ND
Henkel, T
Charnock, JM
van der Laan, G
Pattrick, RAD
Pearce, CI
Cutting, RS
Shannon, IJ
Wood, J
Arenholz, E
Lyon, IC
Lloyd, JR
AF Coker, Victoria S.
Bennett, James A.
Telling, Neil D.
Henkel, Torsten
Charnock, John M.
van der Laan, Gerrit
Pattrick, Richard A. D.
Pearce, Carolyn I.
Cutting, Richard S.
Shannon, Ian J.
Wood, Joe
Arenholz, Elke
Lyon, Ian C.
Lloyd, Jonathan R.
TI Microbial Engineering of Nanoheterostructures: Biological Synthesis of a
Magnetically Recoverable Palladium Nanocatalyst
SO ACS NANO
LA English
DT Article
DE palladium; magnetite; Fe(III)-reducing bacteria; catalysis; Heck
reaction; nanoparticle
ID CATION SITE OCCUPANCY; CIRCULAR-DICHROISM; GEOBACTER-SULFURREDUCENS;
HYDROGENATION REACTIONS; REDUCING MICROORGANISM; COUPLING REACTIONS;
FERRITE SPINELS; HECK REACTIONS; SIMS ANALYSIS; NANOPARTICLES
AB Precious metals supported on ferrimagnetic particles have a diverse range of uses in catalysis. However, fabrication using synthetic methods results in potentially high environmental and economic costs. Here we show a novel biotechnological route for the synthesis of a heterogeneous catalyst consisting of reactive palladium nanoparticles arrayed on a nanoscale biomagnetite support. The magnetic support was synthesized at ambient temperature by the Fe(III)-reducing bacterium, Geobacter sulfurreducens, and facilitated ease of recovery of the catalyst with superior performance due to reduced agglomeration (versus conventional colloidal Pd nanoparticles). Surface arrays of palladium nanoparticles were deposited on the nanomagnetite using a simple one-step method without the need to modify the biomineral surface, most likely due to an organic coating priming the surface for Pd adsorption, which was produced by the bacterial culture during the formation of the nanoparticles. A combination of EXAFS and XPS showed the Pd nanoparticles on the magnetite to be predominantly metallic in nature. The Pd biomagnetite was tested for catalytic activity in the Heck reaction coupling iodobenzene to ethyl acrylate or styrene. Rates of reaction were equal to or superior to those obtained with an equimolar amount of a commercial colloidal palladium catalyst, and near complete conversion to ethyl cinnamate or stilbene was achieved within 90 and 180 min, respectively.
C1 [Coker, Victoria S.; Telling, Neil D.; Henkel, Torsten; Charnock, John M.; van der Laan, Gerrit; Pattrick, Richard A. D.; Pearce, Carolyn I.; Cutting, Richard S.; Lyon, Ian C.; Lloyd, Jonathan R.] Univ Manchester, Sch Earth Atmospher & Environm Sci, Manchester M13 9PL, Lancs, England.
[Coker, Victoria S.; Telling, Neil D.; Henkel, Torsten; Charnock, John M.; van der Laan, Gerrit; Pattrick, Richard A. D.; Pearce, Carolyn I.; Cutting, Richard S.; Lyon, Ian C.; Lloyd, Jonathan R.] Univ Manchester, Williamson Res Ctr Mol Environm Sci, Manchester M13 9PL, Lancs, England.
[Bennett, James A.; Shannon, Ian J.] Univ Birmingham, Sch Chem, Birmingham B15 2TT, W Midlands, England.
[Telling, Neil D.] Keele Univ, Inst Sci & Technol Med, Stoke On Trent ST4 7QB, Staffs, England.
[van der Laan, Gerrit] Diamond Light Source Ltd, Didcot OX11 0DE, Oxon, England.
[Pearce, Carolyn I.] Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA.
[Wood, Joe] Univ Birmingham, Sch Chem Engn, Birmingham B15 2TT, W Midlands, England.
[Arenholz, Elke] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Coker, VS (reprint author), Univ Manchester, Sch Earth Atmospher & Environm Sci, Manchester M13 9PL, Lancs, England.
EM vicky.coker@manchester.ac.uk
RI van der Laan, Gerrit/Q-1662-2015
OI van der Laan, Gerrit/0000-0001-6852-2495
FU EPSRC [EP/D057310/1, abd EP/D058767/1]; BBSRC [BB/E003788/1]; NERC
EnviroSync programme; Director, Office of Science, Office of Basic
Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
FX This work was supported by the EPSRC Grants EP/D057310/1 abd
EP/D058767/1 and BBSRC Grant BB/E003788/1 and the NERC EnviroSync
programme. We would like to thank P. Wincott for XPS analysis, M. Ward
for TEM support, and J. Waters for XRD support. We thank the STFC,
Daresbury, for beamtime, and S. Fiddy for assistance with EXAFS. The
Advanced Light Source is supported by the Director, Office of Science,
Office of Basic Energy Sciences, of the U.S. Department of Energy under
Contract No. DE-AC02-05CH11231 and is thanked for XMCD beamtime.
NR 46
TC 47
Z9 47
U1 8
U2 73
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
J9 ACS NANO
JI ACS Nano
PD MAY
PY 2010
VL 4
IS 5
BP 2577
EP 2584
DI 10.1021/nn9017944
PG 8
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 600HU
UT WOS:000277976900013
PM 20394356
ER
PT J
AU Liang, XG
Chen, T
Jung, YS
Miyamoto, Y
Han, G
Cabrini, S
Ma, BW
Olynick, DL
AF Liang, Xiaogan
Chen, Teresa
Jung, Yeon-Sik
Miyamoto, Yoshikazu
Han, Gang
Cabrini, Stefano
Ma, Biwu
Olynick, Deirdre L.
TI Nanoimprint-Induced Molecular Stacking and Pattern Stabilization in a
Solution-Processed Subphthalocyanine Film
SO ACS NANO
LA English
DT Article
DE nanofabrication; nanoimprint; photovoltaics; subphthalocyanine; surface
diffusion
ID PHOTOVOLTAIC CELLS; LITHOGRAPHY; IMPRINT
AB We present a systematic study on the thermal nanoimprinting of a boron subphthalocynamine molecule, 2-allylphenoxy-(subphthalocyaninato)boron(III) (SubPc-A), which represents a class of attractive small-molecular weight organic compounds for organic-based photovoltaics (OPV). The final equilibrium imprinted feature profile strongly depends on the imprinting temperature. The highest feature aspect ratio (or contrast) occurs at a specific window of imprinting temperatures (80-90 degrees C). X-ray diffraction indicates that the nanoimprint at such a temperature window can induce high-degree molecular stacking, which can help stabilize the imprinted features. Outside this window, we observed a pronounced relaxation of imprinted features after template removal, which is attributed to the surface diffusion. Key factors affecting the final equilibrium profile of the imprinted features were simulated. From the simulation, it was found that the crystallization-induced anisotropy of surface energy stabilized imprinted features. Simulated parameters such as stable feature aspect ratio and pitch agree well with experimental data. Such work provides an important guideline for optimizing the nanopatterning of small-molecular-weight organic compounds.
C1 [Liang, Xiaogan; Chen, Teresa; Jung, Yeon-Sik; Miyamoto, Yoshikazu; Han, Gang; Cabrini, Stefano; Ma, Biwu; Olynick, Deirdre L.] Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA.
RP Liang, XG (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM xliang@lbl.gov; BWMa@lbl.gov; dlolynick@lbl.gov
RI Ma, Biwu/B-6943-2012; JUNG, YEON SIK/C-1798-2011
OI JUNG, YEON SIK/0000-0002-7709-8347
FU Director, Office of Science, Office of Basic Energy Sciences, Materials
Sciences and Engineering Division, of the U.S. Department of Energy
[DE-AC02-05CH11231]
FX This work was supported by the Director, Office of Science, Office of
Basic Energy Sciences, Materials Sciences and Engineering Division, of
the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. The
authors would like to thank Antonio G. DiPasquale and Clayton Mauldin at
UC Berkeley for help with single crystallography and Prof. J. Bokor for
helpful discussion.
NR 22
TC 12
Z9 12
U1 2
U2 12
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
J9 ACS NANO
JI ACS Nano
PD MAY
PY 2010
VL 4
IS 5
BP 2627
EP 2634
DI 10.1021/nn100075t
PG 8
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 600HU
UT WOS:000277976900018
PM 20411983
ER
PT J
AU Rancatore, BJ
Mauldin, CE
Tung, SH
Wang, C
Hexemer, A
Strzalka, J
Frechet, JMJ
Xu, T
AF Rancatore, Benjamin J.
Mauldin, Clayton E.
Tung, Shih-Huang
Wang, Cheng
Hexemer, Alexander
Strzalka, Joseph
Frechet, Jean M. J.
Xu, Ting
TI Nanostructured Organic Semiconductors via Directed Supramolecular
Assembly
SO ACS NANO
LA English
DT Article
DE organic semiconductor; supramolecular assembly; thin film; charge
mobility
ID POLYMER PHOTOVOLTAIC CELLS; COIL BLOCK-COPOLYMERS; THIN-FILMS;
SOLAR-CELLS; CONJUGATED POLYMERS; MOLECULAR-WEIGHT; SELF-ORGANIZATION;
MOBILITY; MORPHOLOGY; COMPLEXES
AB Organic small molecule semiconductors have many advantages over their polymer analogues. However, to fabricate organic semiconductor-based devices using solution processing, it is requisite to eliminate dewetting to ensure film uniformity and desirable to assemble nanoscopic features with tailored macroscopic alignment without compromising their electronic properties. To this end, we present a modular supramolecular approach. A quaterthiophene organic semiconductor is attached to the side chains of poly(4-vinylpyridine) via noncovalent hydrogen bonds to form supramolecular assemblies that act as p-type semiconductors in field-effect transistors. In thin films, the quaterthiophenes can be readily assembled into microdomains, tens of nanometers in size, oriented normal to the surface. The supramolecules exhibited the same field-effect mobilities as that of the quaterthiophene alone (10(-4) cm(2)/(V . s)). Since the organic semiconductors can be readily substituted, this modular supramolecular approach is a viable method for the fabrication of functional, nanostructured organic semiconductor films using solution processing.
C1 [Rancatore, Benjamin J.; Mauldin, Clayton E.; Frechet, Jean M. J.; Xu, Ting] Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA.
[Rancatore, Benjamin J.; Tung, Shih-Huang; Xu, Ting] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
[Rancatore, Benjamin J.; Frechet, Jean M. J.; Xu, Ting] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Wang, Cheng; Hexemer, Alexander] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Strzalka, Joseph] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA.
RP Frechet, JMJ (reprint author), Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA.
EM frechet@berkeley.edu; tingxu@berkeley.edu
RI Wang, Cheng /E-7399-2012; Tung, Shih-Huang/C-6832-2013; Wang,
Cheng/A-9815-2014;
OI Tung, Shih-Huang/0000-0002-6787-4955; Frechet, Jean /0000-0001-6419-0163
FU National Science Foundation [EEC-0832819, DMR-0906638]; Office of
Science, Office of Basic Energy Sciences, Materials Sciences and
Engineering Division, of the U.S. Department of Energy
[DE-AC02-05CH11231, DE-AC02-06CH11357]
FX This work was supported by the National Science Foundation through the
Center of Integrated Nanomechanical Systems under Grant No. EEC-0832819
(B.J.R. and S.-H.T.) and under Grant No. NSF-DMR-0906638 (C.E.M. and
J.M.J.F.). This work is also supported by the Director, Office of
Science, Office of Basic Energy Sciences, Materials Sciences and
Engineering Division, of the U.S. Department of Energy under Contract
No. DE-AC02-05CH11231 (J.M.J.F. and T.X.). The Advanced Light Source is
supported by the Director, Office of Science, Office of Basic Energy
Sciences, of the U.S. Department of Energy under Contract No.
DE-AC02-05CH11231 (C.W. and A.H.). Use of the Advanced Photon Source was
supported by the U.S. Department of Energy, Office of Science, Office of
Basic Energy Sciences, under Contract No. DE-AC02-06CH11357 (J.S.).
NR 58
TC 62
Z9 62
U1 5
U2 55
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
J9 ACS NANO
JI ACS Nano
PD MAY
PY 2010
VL 4
IS 5
BP 2721
EP 2729
DI 10.1021/nn100521f
PG 9
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 600HU
UT WOS:000277976900031
PM 20402495
ER
PT J
AU Poon, BK
Grosse-Kunstleve, RW
Zwart, PH
Sauter, NK
AF Poon, Billy K.
Grosse-Kunstleve, Ralf W.
Zwart, Peter H.
Sauter, Nicholas K.
TI Detection and correction of underassigned rotational symmetry prior to
structure deposition
SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
LA English
DT Article
ID NON-CRYSTALLOGRAPHIC SYMMETRY; PROTEIN DATA-BANK; SPACE-GROUP;
DATA-COLLECTION; DATA QUALITY; REFINEMENT; SOFTWARE; ALGORITHMS;
MACROMOLECULES; STATISTICS
AB Up to 2% of X-ray structures in the Protein Data Bank (PDB) potentially fit into a higher symmetry space group. Redundant protein chains in these structures can be made compatible with exact crystallographic symmetry with minimal atomic movements that are smaller than the expected range of coordinate uncertainty. The incidence of problem cases is somewhat difficult to define precisely, as there is no clear line between underassigned symmetry, in which the subunit differences are unsupported by the data, and pseudosymmetry, in which the subunit differences rest on small but significant intensity differences in the diffraction pattern. To help catch symmetry-assignment problems in the future, it is useful to add a validation step that operates on the refined coordinates just prior to structure deposition. If redundant symmetry-related chains can be removed at this stage, the resulting model (in a higher symmetry space group) can readily serve as an isomorphous replacement starting point for re-refinement using re-indexed and re-integrated raw data. These ideas are implemented in new software tools available at http://cci.lbl.gov/labelit.
C1 [Poon, Billy K.; Grosse-Kunstleve, Ralf W.; Zwart, Peter H.; Sauter, Nicholas K.] Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Sauter, NK (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM nksauter@lbl.gov
RI Sauter, Nicholas/K-3430-2012
FU NIH [1R01 GM77071]
FX The authors would like to thank Ashley Deacon (Joint Center for
Structural Genomics) for creating the archive of full data sets
associated with published JCSG structures, making it possible to develop
new methods such as those described here. Karen Woo (Lawrence Berkeley
National Laboratory) provided invaluable technical assistance. We thank
the NIH for financial support of the LABELIT (1R01 GM77071) and PHENIX
(1P01 GM63210) projects and for additional support to PHZ (Y1GM906411).
This work was partially supported by DOE contract No. DE-AC02-05CH11231.
NR 46
TC 6
Z9 6
U1 0
U2 0
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0907-4449
J9 ACTA CRYSTALLOGR D
JI Acta Crystallogr. Sect. D-Biol. Crystallogr.
PD MAY
PY 2010
VL 66
BP 503
EP 513
DI 10.1107/S0907444910001502
PN 5
PG 11
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
Biophysics; Crystallography
SC Biochemistry & Molecular Biology; Biophysics; Crystallography
GA 589XF
UT WOS:000277186800001
PM 20445225
ER
PT J
AU Gardberg, AS
Del Castillo, AR
Weiss, KL
Meilleur, F
Blakeley, MP
Myles, DAA
AF Gardberg, Anna S.
Del Castillo, Alexis Rae
Weiss, Kevin L.
Meilleur, Flora
Blakeley, Matthew P.
Myles, Dean A. A.
TI Unambiguous determination of H-atom positions: comparing results from
neutron and high-resolution X-ray crystallography
SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
LA English
DT Article
ID PYROCOCCUS-FURIOSUS; PROTEIN CRYSTALLOGRAPHY; CRYSTAL-STRUCTURE;
MACROMOLECULAR STRUCTURES; ANGSTROM RESOLUTION; CYTOCHROME P450CAM;
SOFTWARE SUITE; RUBREDOXIN; DIFFRACTION; REFINEMENT
AB The locations of H atoms in biological structures can be difficult to determine using X-ray diffraction methods. Neutron diffraction offers a relatively greater scattering magnitude from H and D atoms. Here, 1.65 angstrom resolution neutron diffraction studies of fully perdeuterated and selectively CH(3)-protonated perdeuterated crystals of Pyrococcus furiosus rubredoxin (D-rubredoxin and HD-rubredoxin, respectively) at room temperature (RT) are described, as well as 1.1 angstrom resolution X-ray diffraction studies of the same protein at both RT and 100 K. The two techniques are quantitatively compared in terms of their power to directly provide atomic positions for D atoms and analyze the role played by atomic thermal motion by computing the sigma level at the D-atom coordinate in simulated-annealing composite D-OMIT maps. It is shown that 1.65 angstrom resolution RT neutron data for perdeuterated rubredoxin are similar to 8 times more likely overall to provide high-confidence positions for D atoms than 1.1 angstrom resolution X-ray data at 100 K or RT. At or above the 1.0 sigma level, the joint X-ray/neutron (XN) structures define 342/378 (90%) and 291/365 (80%) of the D-atom positions for D-rubredoxin and HD-rubredoxin, respectively. The X-ray-only 1.1 angstrom resolution 100 K structures determine only 19/388 (5%) and 8/ 388 (2%) of the D-atom positions above the 1.0 sigma level for D-rubredoxin and HD-rubredoxin, respectively. Furthermore, the improved model obtained from joint XN refinement yielded improved electron-density maps, permitting the location of more D atoms than electron-density maps from models refined against X-ray data only.
C1 [Gardberg, Anna S.; Del Castillo, Alexis Rae; Weiss, Kevin L.; Meilleur, Flora; Myles, Dean A. A.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Meilleur, Flora] N Carolina State Univ, Raleigh, NC 27695 USA.
[Blakeley, Matthew P.] Inst Max Von Laue Paul Langevin, Grenoble, France.
RP Gardberg, AS (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN USA.
EM anna.s.gardberg@gmail.com
RI Weiss, Kevin/I-4669-2013; myles, dean/D-5860-2016; Blakeley,
Matthew/G-7984-2015
OI Weiss, Kevin/0000-0002-6486-8007; myles, dean/0000-0002-7693-4964;
Blakeley, Matthew/0000-0002-6412-4358
NR 45
TC 25
Z9 25
U1 2
U2 7
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0907-4449
J9 ACTA CRYSTALLOGR D
JI Acta Crystallogr. Sect. D-Biol. Crystallogr.
PD MAY
PY 2010
VL 66
BP 558
EP 567
DI 10.1107/S0907444910005494
PN 5
PG 10
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
Biophysics; Crystallography
SC Biochemistry & Molecular Biology; Biophysics; Crystallography
GA 589XF
UT WOS:000277186800007
PM 20445231
ER
PT J
AU Weadge, JT
Yip, PP
Robinson, H
Arnett, K
Tipton, PA
Howell, PL
AF Weadge, Joel T.
Yip, Patrick P.
Robinson, Howard
Arnett, Krista
Tipton, Peter A.
Howell, P. Lynne
TI Expression, purification, crystallization and preliminary X-ray analysis
of Pseudomonas aeruginosa AlgX
SO ACTA CRYSTALLOGRAPHICA SECTION F-STRUCTURAL BIOLOGY AND CRYSTALLIZATION
COMMUNICATIONS
LA English
DT Article
ID ALGINATE O-ACETYLATION; ESCHERICHIA-COLI; CYSTIC-FIBROSIS; PROTEIN;
BIOSYNTHESIS; LYASE; POLYMERIZATION; LOCALIZATION; DIFFRACTION;
HYDROLASES
AB AlgX is a periplasmic protein required for the production of the exopolysaccharide alginate in Pseudomonas sp. and Azotobacter vinelandii. AlgX has been overexpressed and purified and diffraction-quality crystals have been grown using iterative seeding and the hanging-drop vapor-diffusion method. The crystals grew as flat plates with unit-cell parameters a = 46.4, b = 120.6, c = 86.9 angstrom, beta = 95.7 degrees. The crystals exhibited the symmetry of space group P2(1) and diffracted to a minimum d-spacing of 2.1 angstrom. On the basis of the Matthews coefficient (V(M) = 2.25 angstrom(3) Da(-1)), two molecules were estimated to be present in the asymmetric unit.
C1 [Weadge, Joel T.; Yip, Patrick P.; Howell, P. Lynne] Hosp Sick Children, Program Mol Struct & Funct, Toronto, ON M5G 1X8, Canada.
[Robinson, Howard] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
[Arnett, Krista; Tipton, Peter A.] Univ Missouri, Dept Biochem, Columbia, MO 65211 USA.
[Howell, P. Lynne] Univ Toronto, Fac Med, Dept Biochem, Toronto, ON M5S 1A8, Canada.
RP Howell, PL (reprint author), Hosp Sick Children, Program Mol Struct & Funct, 555 Univ Ave, Toronto, ON M5G 1X8, Canada.
EM howell@sickkids.ca
FU Canadian Institutes of Health Research (CIHR) [MT13337]; National
Institutes of Health Research [GM081419]; Hospital for Sick Children;
Natural Sciences and Engineering Research Council (NSERC) of Canada;
Canada Research Chair
FX The authors thank the Advanced Protein Technology Centre at The Hospital
for Sick Children for assistance with the mass spectrometry. This work
was supported by research grants from the Canadian Institutes of Health
Research (CIHR No. MT13337) to PLH and the National Institutes of Health
Research (GM081419) to PAT. JTW was funded in part by postdoctoral
fellowships from The Hospital for Sick Children and the Natural Sciences
and Engineering Research Council (NSERC) of Canada. PLH is the recipient
of a Canada Research Chair.
NR 33
TC 4
Z9 5
U1 0
U2 0
PU WILEY-BLACKWELL PUBLISHING, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1744-3091
J9 ACTA CRYSTALLOGR F
JI Acta Crystallogr. F-Struct. Biol. Cryst. Commun.
PD MAY
PY 2010
VL 66
BP 588
EP 591
DI 10.1107/S1744309110011851
PN 5
PG 4
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
Biophysics; Crystallography
SC Biochemistry & Molecular Biology; Biophysics; Crystallography
GA 590IC
UT WOS:000277217700026
PM 20445266
ER
PT J
AU Manley, ME
AF Manley, M. E.
TI Impact of intrinsic localized modes of atomic motion on materials
properties
SO ACTA MATERIALIA
LA English
DT Article
DE Intrinsic localized modes; Point defects; Diffusion; Mechanical
properties; Thermal conductivity
ID URANIUM SINGLE CRYSTALS; ALPHA-URANIUM; RELAXOR FERROELECTRICS; ENERGY
LOCALIZATION; DISCRETE BREATHERS; NONLINEAR LATTICES; THERMAL-EXPANSION;
MOVING BREATHERS; ALKALI-HALIDES; TEMPERATURE
AB Recent neutron and X-ray scattering measurements show intrinsic localized modes (ILMs) in metallic uranium and ionic sodium iodide Here, the role ILMs play in the behavior of these materials is examined With the thermal activation of ILMs, thermal expansion is enhanced, made more anisotropic, and, at a microscopic level, becomes inhomogeneous Interstitial diffusion, ionic conductivity, the annealing rate of radiation damage, and void growth are all influenced by ILMs The lattice thermal conductivity is suppressed at the ILM activation temperature, while no impact is observed in the electrical conductivity. This complement of transport properties suggests that ILMs could improve thermoelectric performance Ramifications also include thermal ratcheting, a transition from brittle to ductile fracture, and possibly a phase transformation in uranium (C) 2010 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Manley, ME (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RI Manley, Michael/N-4334-2015
FU US Department of Energy [DE-AC52-07NA27344]
FX Work was performed under the auspices of the US Department of Energy by
Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
The author would like to thank A. J. Sievers, C Marianetti, K Moore, B.
Fultz, M Asta, and J Cuevas for useful comments.
NR 61
TC 34
Z9 39
U1 1
U2 22
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
J9 ACTA MATER
JI Acta Mater.
PD MAY
PY 2010
VL 58
IS 8
BP 2926
EP 2935
DI 10.1016/j.actamat.2010.01.021
PG 10
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 584FK
UT WOS:000276736200013
ER
PT J
AU Kueck, AM
Ramasse, QM
De Jonghe, LC
Ritchie, RO
AF Kueck, A. M.
Ramasse, Q. M.
De Jonghe, L. C.
Ritchie, R. O.
TI Atomic-scale imaging and the effect of yttrium on the fracture toughness
of silicon carbide ceramics
SO ACTA MATERIALIA
LA English
DT Article
DE Ceramics; Silicon carbide; Yttrium dopants; Fracture toughness
ID B-C ADDITIONS; MECHANICAL-PROPERTIES; PHASE-TRANSFORMATION; OXYNITRIDE
GLASSES; MICROSTRUCTURE; BEHAVIOR; NITRIDE; FATIGUE; OXYCARBIDE;
BETA-SI3N4
AB In SiC sintered with Al, B and C additions (ABC-SiC), the presence of Y in the Al-Si-O-C grain-boundary phase leads to less frequent crack deflection and lower toughness When Y is absent from the grain-boundary phase and remains in the triple pockets, crack deflection is restored, and higher toughness results from grain-bridging mechanisms The observations are consistent with elastic modulus changes in the intergranular phase, which depend on their yttria and silica content, and indicate that these can play an important role in determining crack deflection While high-toughness ceramics such as ABC-SiC and Si(3)N(4) rely on sintering additives forming crack-deflecting intergranular films, the present case is a striking example where the presence of a segregant in the grain boundary promotes transgranular fracture by raising the modulus of the nanoscale mtergranular grain-boundary film (C) 2010 Acta Materialia Inc Published by Elsevier Ltd All rights reserved
C1 [Kueck, A. M.; De Jonghe, L. C.; Ritchie, R. O.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
[Kueck, A. M.; De Jonghe, L. C.; Ritchie, R. O.] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Ramasse, Q. M.] Lawrence Berkeley Natl Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
RP Ritchie, RO (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
RI Ritchie, Robert/A-8066-2008
OI Ritchie, Robert/0000-0002-0501-6998
FU Office of Science, Office of Basic Energy Sciences, Materials Sciences
and Engineering Division, of the US Department of Energy
[DE-AC02-050-111231]; Department of Energy at the Lawrence Berkeley
National Laboratory [DE-AC02-050-111231]
FX This work was supported by the Director, Office of Science, Office of
Basic Energy Sciences, Materials Sciences and Engineering Division, of
the US Department of Energy under Contract No DE-AC02-050-111231. Part
of this work was carried out using, the facilities at the National
Center for Electron Microscopy, which is supported at the Lawrence
Berkeley National Laboratory by the Department of Energy under the same
contract number
NR 35
TC 9
Z9 9
U1 3
U2 23
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
J9 ACTA MATER
JI Acta Mater.
PD MAY
PY 2010
VL 58
IS 8
BP 2999
EP 3005
DI 10.1016/j.actamat.2010.01.031
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 584FK
UT WOS:000276736200020
ER
PT J
AU Hu, SY
Henager, CH
AF Hu, S. Y.
Henager, C. H., Jr.
TI Phase-field simulation of void migration in a temperature gradient
SO ACTA MATERIALIA
LA English
DT Article
DE Void migration; Surface and bulk diffusion; Vacancy; Temperature
gradient; Phase-field model
ID RAY COMPUTER-TOMOGRAPHY; FISSION-GAS BUBBLES; SELF-ORGANIZATION; LATTICE
FORMATION; UO2 FUEL; IRRADIATION; METALS; EVOLUTION; GROWTH; MOLYBDENUM
AB A phase-field model simulating vacancy diffusion in a solid with a strong vacancy mobility inhomogeneity is presented. The model is used to study void migration via bulk and surface diffusion in a temperature gradient. The simulations demonstrate that voids migrate up the temperature gradient, and the migration velocity varies inversely with the void size, in agreement with theory. It is also shown that the current model has the capability to investigate the effects of surface diffusion, temperature gradient and vacancy concentration on the void migration velocity. An interesting potential application of the model is to study the kinetics of void migration and the formation of a central hole in nuclear fuels. (C) 2010 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
C1 [Hu, S. Y.; Henager, C. H., Jr.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Hu, SY (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM shenyang.hu@pnl.gov
OI HU, Shenyang/0000-0002-7187-3082; Henager, Chuck/0000-0002-8600-6803
FU Laboratory Directed Research and Development Program; US Department of
Energy [DE-AC05-76RL01830]
FX This research was supported by a Laboratory Directed Research and
Development Program and the US Department of Energy's Nuclear Energy
Advance Modeling and Simulation (NEAMS) Program in Pacific Northwest
National Laboratory which is operated by Battelle Memorial Institute for
the US Department of Energy under Contract No. DE-AC05-76RL01830. The
authors thank Dr. Yulan Li at PNNL for technical discussions on the
modeling and careful check of the results.
NR 29
TC 26
Z9 26
U1 5
U2 33
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
EI 1873-2453
J9 ACTA MATER
JI Acta Mater.
PD MAY
PY 2010
VL 58
IS 9
BP 3230
EP 3237
DI 10.1016/j.actamat.2010.01.043
PG 8
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 597HL
UT WOS:000277747400005
ER
PT J
AU Frenzel, J
George, EP
Dlouhy, A
Somsen, C
Wagner, MFX
Eggeler, G
AF Frenzel, J.
George, E. P.
Dlouhy, A.
Somsen, Ch.
Wagner, M. F. -X.
Eggeler, G.
TI Influence of Ni on martensitic phase transformations in NiTi shape
memory alloys
SO ACTA MATERIALIA
LA English
DT Article
DE NiTi shape memory alloys; Phase transformation temperatures;
Thermodynamics; Vacuum arc melting; Hysteresis width
ID ELECTRON-MICROSCOPY OBSERVATIONS; BENDING-ROTATION FATIGUE;
TITANIUM-NICKEL SYSTEM; CHEMICAL-COMPOSITION; GRAPHITE CRUCIBLES;
CRYSTAL-STRUCTURE; SINGLE-CRYSTALS; TINI; MICROSTRUCTURE; BEHAVIOR
AB High-precision data on phase transformation temperatures in NiTi, including numerical expressions for the effect of Ni on M(S), M(F), A(S), A(F) and T(0), are obtained, and the reasons for the large experimental scatter observed in previous studies are discussed. Clear experimental evidence is provided confirming the predictions of Tang et al. 1999 [19] regarding deviations from a linear relation between the thermodynamic equilibrium temperature and Ni concentration. In addition to affecting the phase transition temperatures, increasing Ni contents are found to decrease the width of thermal hysteresis and the heat of transformation. These findings are rationalized on the basis of the crystallographic data of Prokoshkin et al. 2004 [68] and the theory of Ball and James [25]. The results show that it is important to document carefully the details of the arc-melting procedure used to make shape memory alloys and that, if the effects of processing are properly accounted for, precise values for the Ni concentration of the NiTi matrix can be obtained. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Frenzel, J.; Somsen, Ch.; Eggeler, G.] Ruhr Univ Bochum, Inst Mat, D-44801 Bochum, Germany.
[George, E. P.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[George, E. P.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Dlouhy, A.] AS CR, Inst Phys Mat, CZ-61662 Brno, Czech Republic.
[Wagner, M. F. -X.] Tech Univ Chemnitz, Inst Mat Sci & Mat Technol, D-09107 Chemnitz, Germany.
RP Frenzel, J (reprint author), Ruhr Univ Bochum, Inst Mat, D-44801 Bochum, Germany.
EM jan.a.frenzel@rub.de
RI Wagner, Martin/A-6880-2008; Dlouhy, Antonin/F-9721-2014; George,
Easo/L-5434-2014; Eggeler, Gunther/R-9833-2016;
OI Frenzel, Jan/0000-0002-2778-5392; Wagner, Martin/0000-0003-4082-2618
FU Deutsche Forschungsgemeinschaft (DFG); North Rhine-Westphalia; Ruhr
University Bochum; Division of Materials Sciences and Engineering, US
Department of Energy; Czech Science Foundation [106/09/1913]
FX The authors acknowledge funding through Projects A1, A8 and C7 of the
collaborative research center SFB459 (Shape Memory Technology) funded by
the Deutsche Forschungsgemeinschaft (DFG), North Rhine-Westphalia and
the Ruhr University Bochum. EPG was supported by the Division of
Materials Sciences and Engineering, US Department of Energy. MW
acknowledges funding in the framework of the Emmy Noether program of the
DFG. AD acknowledges funding by the Czech Science Foundation through
Project 106/09/1913.
NR 69
TC 172
Z9 178
U1 16
U2 105
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
J9 ACTA MATER
JI Acta Mater.
PD MAY
PY 2010
VL 58
IS 9
BP 3444
EP 3458
DI 10.1016/j.actamat.2010.02.019
PG 15
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 597HL
UT WOS:000277747400026
ER
PT J
AU Leung, BO
Hitchcock, AP
Brash, JL
Scholl, A
Doran, A
AF Leung, Bonnie O.
Hitchcock, Adam P.
Brash, John L.
Scholl, Andreas
Doran, Andrew
TI An X-ray Spectromicroscopy Study of Albumin Adsorption to Cross linked
Polyethylene Oxide Films
SO ADVANCED ENGINEERING MATERIALS
LA English
DT Article
ID ADVANCED LIGHT-SOURCE; POLY(ETHYLENE OXIDE); PROTEIN ADSORPTION;
MOLECULAR-WEIGHT; CHAIN DENSITY; SURFACE; GLYCOL); MICROSCOPY;
HYDROGELS; DIFFUSION
AB Synchrotron-based X-ray photoemission electron microscopy (X-PEEM) is used to characterize the near surface composition of polyethylene oxide (PEO) combined with 1.5, 5, and 10 wt.-% pentaerythritol triacrylate (PETA) crosslinker. It is found that as the concentration of PETA increases, it becomes the dominant component in the top 10 nm of the film surface. The same surfaces are also exposed to human serum albumin (HSA) and the distributions of the protein relative to PEO and PETA measured with X-PEEM. A positive correlation is found between levels of PETA and HSA at the surface. Above PETA concentrations of 5 wt.-%, HSA adsorption is significant, which suggests high levels of PETA (often used to immobilize PEO by crosslinking) can significantly reduce the non-fouling properties of PEO.
C1 [Leung, Bonnie O.; Hitchcock, Adam P.] McMaster Univ, BIMR, Hamilton, ON L8S 4M1, Canada.
[Brash, John L.] McMaster Univ, Sch Biomed Engn, Hamilton, ON L8S 4M1, Canada.
[Scholl, Andreas; Doran, Andrew] Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Leung, BO (reprint author), McMaster Univ, BIMR, Hamilton, ON L8S 4M1, Canada.
EM leungbo@mcmaster.ca
RI Scholl, Andreas/K-4876-2012;
OI Doran, Andrew/0000-0001-5158-4569
FU Natural Sciences and Engineering Research Council (NSERC, Canada); US
Department of Energy [DE-AC03-76SF00098]; AFMNet; Canada Research Chair
FX This research was supported by the Natural Sciences and Engineering
Research Council (NSERC, Canada), AFMNet and the Canada Research Chair
programs. X-ray microscopy was carried out using PEEM-2 and STXM532 at
the ALS. The ALS is supported by the US Department of Energy under
Contract DE-AC03-76SF00098.
NR 41
TC 5
Z9 5
U1 1
U2 8
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 1438-1656
EI 1527-2648
J9 ADV ENG MATER
JI Adv. Eng. Mater.
PD MAY
PY 2010
VL 12
IS 5
SI SI
BP B133
EP B138
DI 10.1002/adem.200980050
PG 6
WC Materials Science, Multidisciplinary
SC Materials Science
GA 613AM
UT WOS:000278948100014
ER
PT J
AU Jagust, WJ
Bandy, D
Chen, KW
Foster, NL
Landau, SM
Mathis, CA
Price, JC
Reiman, EM
Skovronsky, D
Koeppe, RA
AF Jagust, William J.
Bandy, Dan
Chen, Kewei
Foster, Norman L.
Landau, Susan M.
Mathis, Chester A.
Price, Julie C.
Reiman, Eric M.
Skovronsky, Daniel
Koeppe, Robert A.
CA Alzheimer's Dis Neuroimaging Initi
TI The Alzheimer's Disease Neuroimaging Initiative positron emission
tomography core
SO ALZHEIMERS & DEMENTIA
LA English
DT Review
DE PET; Fluorodeoxyglucose; Amyloid imaging; Biomarkers
ID COGNITIVE IMPAIRMENT; AMYLOID DEPOSITION; APOLIPOPROTEIN-E; GENETIC
RISK; DEMENTIA; ALLELE; ADNI; PET
AB Background: This is a progress report of the Alzheimer's Disease Neuroimaging Initiative (ADNI) positron emission tomography (PET) Core
Methods: The Cole has supervised the acquisition. quality control. and analysis of longitudinal [(18)F]fluorodeoxyglucose PET (FDG-PET) data in approximately half of the ADNI cohort In an "add on" study. approximately 100 subjects also underwent scanning with [(11)C] Pittsburgh compound B PET for amyloid imaging. The Core developed quality control procedures and standardized image acquisition by developing an imaging protocol that has been widely adopted in academic and pharmaceutical industry studies Data processing provides users with scans that have identical orientation and resolution characteristics despite acquisition on multiple scanner models The Core labs have used many different approaches to characterize differences between subject groups (Alzheimer's disease. mild cognitive impairment, controls), to examine longitudinal change over time in glucose metabolism and amyloid deposition. and to assess the use of FDG-PET as a potential outcome measure in clinical trials
Results: ADNI data indicate that FDG-PET increases statistical power over traditional cognitive measures. might aid subject selection. and could substantially reduce the sample size in a clinical trial Pittsburgh compound B PET data showed expected group differences. and identified subjects with significant annual increases in amyloid load across the subject groups The next activities of the PET core in ADNI will entail developing standardized protocols for amyloid imaging using the [(18)F]-labeled amyloid imaging agent AV45. which can be delivered to virtually all ADNI sites
Conclusions: ADNI has demonstrated the feasibility and utility of multicenter in PET studies and is helping to clarify the role of biomarkers in the study of aging and dementia (C) 2010 The Alzheimer's Association All rights reserved
C1 [Jagust, William J.; Landau, Susan M.] Univ Calif Berkeley, Helen Wills Neurosci Inst, Berkeley, CA 94720 USA.
[Jagust, William J.; Landau, Susan M.] Lawrence Berkeley Natl Lab, Berkeley, CA USA.
[Bandy, Dan; Chen, Kewei; Reiman, Eric M.] Banner Alzheimers Inst, Phoenix, AZ USA.
[Bandy, Dan; Chen, Kewei; Reiman, Eric M.] Banner Good Samaritan PET Ctr, Phoenix, AZ USA.
[Bandy, Dan; Chen, Kewei; Reiman, Eric M.] Univ Arizona, Translat Genom Res Inst, Phoenix, AZ USA.
[Bandy, Dan; Chen, Kewei; Reiman, Eric M.] Arizona Alzheimers Consortium, Phoenix, AZ USA.
[Chen, Kewei] Arizona State Univ, Dept Math, Tempe, AZ 85287 USA.
[Foster, Norman L.] Univ Utah, Ctr Alzheimers Care Imaging & Res, Salt Lake City, UT USA.
[Foster, Norman L.] Univ Utah, Dept Neurol, Salt Lake City, UT USA.
[Mathis, Chester A.; Price, Julie C.] Univ Pittsburgh, Dept Radiol, Pittsburgh, PA 15260 USA.
[Skovronsky, Daniel] Avid Radiopharmaceut Inc, Philadelphia, PA USA.
[Skovronsky, Daniel] Univ Penn, Dept Radiol, Philadelphia, PA 19104 USA.
[Koeppe, Robert A.] Univ Michigan, Dept Radiol, Div Nucl Med, Ann Arbor, MI 48109 USA.
RP Jagust, WJ (reprint author), Univ Calif Berkeley, Helen Wills Neurosci Inst, Berkeley, CA 94720 USA.
RI Chen, kewei/P-6304-2015
OI Chen, kewei/0000-0001-8497-3069
FU Alzheimer's Disease Neuroimaging Initiative (ADNI) (National Institutes
of Health) [U01 AG024904]; National Institute on Aging; National
Institute of Biomedical Imaging and Bioengineering; Abbott; AstraZeneca
AB; Bayer Schering Pharma AG; Bristol-Myers Squibb; Eisai Global
Clinical Development; Elan Corporation; Genentech; GE Healthcare;
GlaxoSmithKline; Innogenetics; Johnson and Johnson; Eli Lilly and Co.;
Medpace, Inc.; Merck and Co. Inc.; Novartis AG; Pfizer Inc; F Hoffman-La
Roche; Schering-Plough; Synarc, Inc.; Wyeth; U.S. Food and Drug
Administration; NIH [P30 AG010129, K01 AG030514]; Dana Foundation
FX Data collection and sharing for this project was funded by the
Alzheimer's Disease Neuroimaging Initiative (ADNI) (National Institutes
of Health Grant U01 AG024904) ADNI is funded by the National Institute
on Aging. the National Institute of Biomedical Imaging and
Bioengineering, and through generous contributions from the. following
Abbott. AstraZeneca AB. Bayer Schering Pharma AG. Bristol-Myers Squibb.
Eisai Global Clinical Development, Elan Corporation. Genentech. GE
Healthcare. GlaxoSmithKline. Innogenetics, Johnson and Johnson. Eli
Lilly and Co. Medpace, Inc. Merck and Co. Inc. Novartis AG. Pfizer Inc,
F Hoffman-La Roche. Schering-Plough. Synarc, Inc., and Wyeth. as well as
nonprofit partners the Alzheimer's Association and Alzheimer's Data
Discovery Foundation, with participation form the U.S. Food and Drug
Administration Private sector contributions to ADNI are facilitated by
the Foundation for the National Institutes of Health (http.//www fnih
org/). The grantee organization is the Northern California Institute for
Research and Education. and the study is coordinated by the Alzheimer's
Disease Cooperative Study at the University of California. San Diego.
ADNI data are disseminated by the Laboratory for Neuro Imaging at the
University of California, Los Angeles This research was also supported
by NIH wants P30 AG010129. K01 AG030514, and the Dana Foundation.
NR 18
TC 188
Z9 188
U1 6
U2 16
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1552-5260
J9 ALZHEIMERS DEMENT
JI Alzheimers. Dement.
PD MAY
PY 2010
VL 6
IS 3
BP 221
EP 229
DI 10.1016/j.jalz.2010.03.003
PG 9
WC Clinical Neurology
SC Neurosciences & Neurology
GA 599RV
UT WOS:000277931700004
PM 20451870
ER
PT J
AU Elliott, J
Foster, I
Kortum, S
Munson, T
Cervantes, FP
Weisbach, D
AF Elliott, Joshua
Foster, Ian
Kortum, Samuel
Munson, Todd
Cervantes, Fernando Perez
Weisbach, David
TI Trade and Carbon Taxes
SO AMERICAN ECONOMIC REVIEW
LA English
DT Article; Proceedings Paper
CT 122nd Annual Meeting of the American-Economics-Association
CY 2010
CL Atlanta, GA
SP Amer Econ Assoc
C1 [Elliott, Joshua; Foster, Ian; Munson, Todd] Univ Chicago, Computat Inst, Chicago, IL 60637 USA.
[Elliott, Joshua; Foster, Ian; Munson, Todd] Argonne Natl Lab, Argonne, IL 60439 USA.
[Kortum, Samuel; Cervantes, Fernando Perez] Univ Chicago, Dept Econ, Chicago, IL 60637 USA.
[Weisbach, David] Univ Chicago, Sch Law, Chicago, IL 60637 USA.
RP Elliott, J (reprint author), Univ Chicago, Computat Inst, Chicago, IL 60637 USA.
EM jelliott@ci.uchicago.edu; foster@mcs.anl.gov; kortum@uchicago.edu;
tmunson@mcs.anl.gov; fernandoperez@uchicago.edu; d-weisbach@uchicago.edu
NR 8
TC 46
Z9 49
U1 5
U2 15
PU AMER ECONOMIC ASSOC
PI NASHVILLE
PA 2014 BROADWAY, STE 305, NASHVILLE, TN 37203 USA
SN 0002-8282
J9 AM ECON REV
JI Am. Econ. Rev.
PD MAY
PY 2010
VL 100
IS 2
BP 465
EP 469
DI 10.1257/aer.100.2.465
PG 5
WC Economics
SC Business & Economics
GA 605ZN
UT WOS:000278389300090
ER
PT J
AU Zhang, GP
Wei, ZX
Ferrell, RE
Guggenheim, S
Cygan, RT
Luo, J
AF Zhang, Guoping
Wei, Zhongxin
Ferrell, Ray E.
Guggenheim, Stephen
Cygan, Randall T.
Luo, Jian
TI Evaluation of the elasticity normal to the basal plane of non-expandable
2:1 phyllosilicate minerals by nanoindentation
SO AMERICAN MINERALOGIST
LA English
DT Article
DE Elasticity; interlayer interactions; nanoindentation; phyllosilicates;
Young's modulus
ID CRYSTAL-STRUCTURES; SINGLE-CRYSTAL; MUSCOVITE; MODULUS; REFINEMENT;
PRESSURE; HARDNESS; COMPRESSIBILITIES; INDENTATION; PHLOGOPITE
AB Nanoindentation experiments were conducted to investigate the elasticity normal to the basal plane of six non-expandable, hydrous 2:1 phyllosilicate minerals (pyrophyllite, talc, biotite, two muscovite samples, and margarite) with layer charge z ranging from 0 to 1.823 per O(10)(OH)(2). For the examined indentation depth h of <= 200 nm, the measured Young's modulus E decreases with increasing h. Furthermore, the rate of reduction in the apparent E, in general, decreases with increasing z. The dependence of apparent E on h is attributed to indentation-induced inelastic deformation, particularly the deformation related to the high local stresses beneath the indenter tip, such as kink band formation, layer delamination, void generation, and cracking, which tend to cause damage to the layer structure. To minimize the influence of inelastic deformation on the measurement of E by indentation, the maximum E at small h is proposed to be the truly representative elastic modulus. The stiffest species, margarite, with z = 1.823, has a representative E of 165.5 GPa, seven times greater than that of pyrophyllite with z = 0 and E = 23.5 GPa. A nearly linear correlation between the representative E and the square of the ratio of the surface charge density sigma to half of the basal spacing d(001), [2 sigma/d(001)](2), exists. This relationship suggests that the elasticity normal to the basal plane of these phyllosilicates is primarily controlled by the long-range electrostatic attractions between the 2:1 layer and interlayer cations instead of atomic bonds within the 2:1 layer, although other compositional and structural variations also affect the interlayer interactions. This relationship may indicate that the interlayer complexes can be used as the elasticity signatures of phyllosilicate minerals.
C1 [Zhang, Guoping; Wei, Zhongxin] Louisiana State Univ, Dept Civil & Environm Engn, Baton Rouge, LA 70803 USA.
[Ferrell, Ray E.] Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA.
[Guggenheim, Stephen] Univ Illinois, Dept Earth & Environm Sci, Chicago, IL 60607 USA.
[Cygan, Randall T.] Sandia Natl Labs, Dept Geochem, Albuquerque, NM 87185 USA.
[Luo, Jian] Clemson Univ, Sch Mat Sci & Engn, Clemson, SC 29634 USA.
RP Zhang, GP (reprint author), Louisiana State Univ, Dept Civil & Environm Engn, Baton Rouge, LA 70803 USA.
EM gzhang@lsu.edu
RI Luo, Jian/A-4777-2008; Zhang, Guoping/G-9189-2012
FU Louisiana Board of Regents [LEQSF(2007-08)-ENH-TR-24]; LSU Graduate
School
FX Financial support from the Louisiana Board of Regents through Contract
LEQSF(2007-08)-ENH-TR-24, to assist in the acquisition of a
nanomechanical testing and characterization system, is gratefully
acknowledged. Z.W. received the Graduate Supplement Award from LSU
Graduate School to partially support his graduate study.
NR 37
TC 6
Z9 6
U1 2
U2 18
PU MINERALOGICAL SOC AMER
PI CHANTILLY
PA 3635 CONCORDE PKWY STE 500, CHANTILLY, VA 20151-1125 USA
SN 0003-004X
J9 AM MINERAL
JI Am. Miner.
PD MAY-JUN
PY 2010
VL 95
IS 5-6
BP 863
EP 869
DI 10.2138/am.2010.3398
PG 7
WC Geochemistry & Geophysics; Mineralogy
SC Geochemistry & Geophysics; Mineralogy
GA 595ZX
UT WOS:000277654100022
ER
PT J
AU Etschmann, BE
Ryan, CG
Brugger, J
Kirkham, R
Hough, RM
Moorhead, G
Siddons, DP
De Geronimo, G
Kuczewski, A
Dunn, P
Paterson, D
de Jonge, MD
Howard, DL
Davey, P
Jensen, M
AF Etschmann, B. E.
Ryan, C. G.
Brugger, J.
Kirkham, R.
Hough, R. M.
Moorhead, G.
Siddons, D. P.
De Geronimo, G.
Kuczewski, A.
Dunn, P.
Paterson, D.
de Jonge, M. D.
Howard, D. L.
Davey, P.
Jensen, M.
TI Reduced As components in highly oxidized environments: Evidence from
full spectral XANES imaging using the Maia massively parallel detector
SO AMERICAN MINERALOGIST
LA English
DT Article
DE Arsenic; oxidation state; XANES; element distribution; imaging; X-ray
fluorescence
ID EASTERN SWISS ALPS; VAL-FERRERA; NUCLEAR MICROPROBE; SYNCHROTRON;
SPECIATION; SPECTROSCOPY; DEPOSITS; PIXE
AB Synchrotron X-ray fluorescence (SXRF) and X-ray absorption spectroscopy (XAS) have become standard tools to measure element concentration, distribution at micrometer- to nanometer-scale, and speciation (e.g., nature of host phase; oxidation state) in inhomogeneous geomaterials. The new Maia X-ray detector system provides a quantum leap for the method in terms of data acquisition rate. It is now possible to rapidly collect fully quantitative maps of the distribution of major and trace elements at micrometer spatial resolution over areas as large as 1 x 5 cm(2). Fast data acquisition rates also open the way to X-ray absorption near-edge structure (XANES) imaging, in which spectroscopic information is available at each pixel in the map. These capabilities are critical for studying inhomogeneous Earth materials. Using a 96-element prototype Maia detector, we imaged thin sections of an oxidized pisolitic regolith (2 x 4.5 mm(2) at 2.5 x 2.5 mu m(2) pixel size) and a metamorphosed, sedimentary exhalative Mn-Fe ore (3.3 x 4 mm(2) at 1.25 x 5 mu m(2)). In both cases, As K-edge XANES imaging reveals localized occurrence of reduced As in parts of these oxidized samples, which would have been difficult to recognize using traditional approaches.
C1 [Etschmann, B. E.; Brugger, J.] Univ Adelaide, Adelaide, SA 5005, Australia.
[Ryan, C. G.; Hough, R. M.] CSIRO, Explorat & Min, Clayton, Vic 3168, Australia.
[Ryan, C. G.; Moorhead, G.] Univ Melbourne, Sch Phys, Parkville, Vic 5010, Australia.
[Ryan, C. G.] Univ Tasmania, CODES Ctr Excellence, Hobart, Tas 7001, Australia.
[Brugger, J.] S Australian Museum, Adelaide, SA 5000, Australia.
[Kirkham, R.; Moorhead, G.; Dunn, P.; Davey, P.; Jensen, M.] CSIRO Mat Sci & Engn, Clayton, Vic 3168, Australia.
[Siddons, D. P.] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
[De Geronimo, G.; Kuczewski, A.] Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA.
[Paterson, D.; de Jonge, M. D.; Howard, D. L.] Australian Synchrotron, Clayton, Vic 3168, Australia.
RP Etschmann, BE (reprint author), Univ Adelaide, Adelaide, SA 5005, Australia.
EM barbara.etschmann@adelaide.edu.au
RI Ryan, Chris/A-6032-2011; Kirkham, Robin/C-9786-2010; de Jonge,
Martin/C-3400-2011; Dunn, Paul/D-6721-2012; Davey, Peter/D-6746-2012;
Jensen, Murray/E-8265-2012; Moorhead, Gareth/B-6634-2009; Etschmann,
Barbara/H-7731-2012; Brugger, Joel/C-7113-2008
OI Ryan, Chris/0000-0003-2891-3912; Kirkham, Robin/0000-0003-1012-3496;
Jensen, Murray/0000-0002-2247-4421; Moorhead,
Gareth/0000-0002-9299-9549; Brugger, Joel/0000-0003-1510-5764
FU Australian Research Council [DP0878903]; CSIRO; AS
FX We acknowledge the Australian Research Council (fellowship DP0878903 to
J.B.), the CSIRO Emerging Science program, the AS for travel funding,
and the helpful comments of two anonymous reviewers.
NR 17
TC 27
Z9 27
U1 2
U2 22
PU MINERALOGICAL SOC AMER
PI CHANTILLY
PA 3635 CONCORDE PKWY STE 500, CHANTILLY, VA 20151-1125 USA
SN 0003-004X
J9 AM MINERAL
JI Am. Miner.
PD MAY-JUN
PY 2010
VL 95
IS 5-6
BP 884
EP 887
DI 10.2138/am.2010.3469
PG 4
WC Geochemistry & Geophysics; Mineralogy
SC Geochemistry & Geophysics; Mineralogy
GA 595ZX
UT WOS:000277654100026
ER
PT J
AU Austin, J
Kimura, RH
Woo, YH
Camarero, JA
AF Austin, Jeffrey
Kimura, Richard H.
Woo, Youn-Hi
Camarero, Julio A.
TI In vivo biosynthesis of an Ala-scan library based on the cyclic peptide
SFTI-1
SO AMINO ACIDS
LA English
DT Article
DE Bowman-Birk inhibitor; Trypsin inhibitor; Backbone cyclized peptides;
Genetically encoded libraries; Protein splicing
ID SUNFLOWER TRYPSIN INHIBITOR-1; EXPRESSED PROTEIN LIGATION; MACROCYCLIC
PEPTIDES; CIRCULAR PROTEINS; CHEMICAL LIGATION; SPLIT INTEIN; DRUG
DESIGN; DNAE GENE; CYCLIZATION; CYCLOTIDES
AB We present the in vivo biosynthesis of wild-type sunflower trypsin inhibitor 1 (SFTI-1) inside E. coli cells using an intramolecular native chemical ligation in combination with a modified protein splicing unit. SFTI-1 is a small backbone cyclized polypeptide with a single disulfide bridge. A small library containing multiple Ala mutants was also biosynthesized and its activity was assayed using a trypsin-binding assay. This study clearly demonstrates the exciting possibility of generating large cyclic peptide libraries in live E. coli cells, and is a critical first step for developing in vivo screening and directed evolution technologies using the cyclic peptide SFTI-1 as a molecular scaffold.
C1 [Camarero, Julio A.] Univ So Calif, Sch Pharm, Dept Pharmaceut Sci & Pharmacol, Los Angeles, CA 90033 USA.
[Austin, Jeffrey; Kimura, Richard H.; Woo, Youn-Hi; Camarero, Julio A.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Camarero, JA (reprint author), Univ So Calif, Sch Pharm, Dept Pharmaceut Sci & Pharmacol, 1985 Zonal Ave,PSC 616, Los Angeles, CA 90033 USA.
EM camarej@usc.edu
RI Camarero, Julio/A-9628-2015
FU School of Pharmacy at the University of Southern California; Lawrence
Livermore National Laboratory
FX Work was supported by funding from the School of Pharmacy at the
University of Southern California and Lawrence Livermore National
Laboratory.
NR 38
TC 38
Z9 40
U1 0
U2 4
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0939-4451
J9 AMINO ACIDS
JI Amino Acids
PD MAY
PY 2010
VL 38
IS 5
BP 1313
EP 1322
DI 10.1007/s00726-009-0338-4
PG 10
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 589GC
UT WOS:000277133900004
PM 19685144
ER
PT J
AU Woodward, SD
Urbanova, I
Nurok, D
Svec, F
AF Woodward, Scott D.
Urbanova, Iva
Nurok, David
Svec, Frantisek
TI Separation of Peptides and Oligonucleotides Using a Monolithic Polymer
Layer and Pressurized Planar Electrophoresis and Electrochromatography
SO ANALYTICAL CHEMISTRY
LA English
DT Article
ID CAPILLARY ELECTROCHROMATOGRAPHY; LIQUID-CHROMATOGRAPHY;
SURFACE-CHEMISTRY; VOLTAGE PROFILES; MEDIA; FLOW; APPARATUS; PROTEINS
AB The rapid separation of mixtures of six peptides using porous polymer monolithic layers in electrophoresis and pressurized planar electrochromatography modes has been achieved. The separations in the former mode were performed on a generic hydrophobic poly(butyl methacrylate-co-ethylene dimethacrylate) layer with no ionizable functionalities and required 2 min. This layer also enabled the separation of three oligonucleotides. The separation in the pressurized planar electrochromatographic mode was carried out using a negatively charged layer prepared via cografting of 2-acrylamido-2-methyl-1-propanesulfonic acid and 2-hydroxyethyl methacrylate on top of the generic hydrophobic monolith and was completed in 1 min.
C1 [Woodward, Scott D.; Nurok, David] Indiana Univ Purdue Univ, Dept Chem & Chem Biol, Indianapolis, IN 46202 USA.
[Urbanova, Iva; Svec, Frantisek] Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA.
RP Nurok, D (reprint author), Indiana Univ Purdue Univ, Dept Chem & Chem Biol, 402 N Blackford St, Indianapolis, IN 46202 USA.
EM dnurok@iupui.edu; fsvec@lbl.gov
FU Office of Science, Office of Basic Energy Sciences, Materials Sciences
and Engineering Division of the U.S. Department of Energy
[DE-AC02-05CH1123]
FX F.S. and I.U. as well as the preparation of monolithic layers were
supported by the Director, Office of Science, Office of Basic Energy
Sciences, Materials Sciences and Engineering Division of the U.S.
Department of Energy under Contract No. DE-AC02-05CH1123. The authors
appreciate the initial help of Dr. Pavel Levkin, Dr. Allyson Novotny,
and Yehua Han with this project.
NR 22
TC 25
Z9 26
U1 1
U2 20
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0003-2700
J9 ANAL CHEM
JI Anal. Chem.
PD MAY 1
PY 2010
VL 82
IS 9
BP 3445
EP 3448
DI 10.1021/ac100392b
PG 4
WC Chemistry, Analytical
SC Chemistry
GA 590GO
UT WOS:000277213400012
PM 20364841
ER
PT J
AU Reindl, W
Northen, TR
AF Reindl, Wolfgang
Northen, Trent R.
TI Rapid Screening of Fatty Acids Using Nanostructure-Initiator Mass
Spectrometry
SO ANALYTICAL CHEMISTRY
LA English
DT Article
ID CHLAMYDOMONAS-REINHARDTII; BIODIESEL PRODUCTION; QUALITY-CONTROL; ALKYL
ESTERS; PERSPECTIVES; TYPIFICATION; MICROALGAE; BIOFUELS; OILS
AB We present the application of nanostructure-initiator mass spectrometry (NIMS) as a fast and simple method for the analysis of plant and microbial fatty acids. NIMS allowed the direct detection of a broad range of saturated and unsaturated fatty acids in negative mode showing linearity over several orders of magnitude with a limit of detection at the femtomole level. Additionally, the fatty acid compositions of olive and soybean oil and the algal species Chlamydomonas reinhardtii could be determined both qualitatively and quantitatively with only minimal sample volumes and preparation steps. The unique properties of the NIMS surface allowed for an in situ sample cleanup step leading to a more than 10-fold increase of the signal-to-noise ratio. Our data provide the basis for rapid screening of plant and microbial oils and may aid in the development of biodiesel fuels.
C1 [Reindl, Wolfgang; Northen, Trent R.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Dept Bioenergy GTL & Struct Biol, Berkeley, CA 94720 USA.
RP Northen, TR (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Dept Bioenergy GTL & Struct Biol, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM trnorthen@lbl.gov
RI Northen, Trent/K-3139-2012;
OI Northen, Trent/0000-0001-8404-3259
FU US Department of Energy [DE-AC02-05CH11231]; Department of Plant and
Microbial Biology, University of California, Berkeley, CA
FX We gratefully acknowledge support from the US Department of Energy
[DE-AC02-05CH11231) and Prof. Krishna Niyogi (Department of Plant and
Microbial Biology, University of California, Berkeley, CA).
NR 28
TC 18
Z9 18
U1 3
U2 14
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0003-2700
J9 ANAL CHEM
JI Anal. Chem.
PD MAY 1
PY 2010
VL 82
IS 9
BP 3751
EP 3755
DI 10.1021/ac100159y
PG 5
WC Chemistry, Analytical
SC Chemistry
GA 590GO
UT WOS:000277213400053
PM 20356051
ER
PT J
AU Oakey, J
Applegate, RW
Arellano, E
Di Carlo, D
Graves, SW
Toner, M
AF Oakey, John
Applegate, Robert W., Jr.
Arellano, Erik
Di Carlo, Dino
Graves, Steven W.
Toner, Mehmet
TI Particle Focusing in Staged Inertial Microfluidic Devices for Flow
Cytometry
SO ANALYTICAL CHEMISTRY
LA English
DT Article
ID SYSTEMS; CELLS; MANIPULATION
AB Microfluidic inertial focusing has been demonstrated to be an effective method for passively positioning microparticles and cells without the assistance of sheath fluid. Because inertial focusing produces well-defined lateral equilibrium particle positions in addition to highly regulated interparticle spacing, its value in flow cytometry has been suggested. Particle focusing occurs in straight channels and can be manipulated through cross sectional channel geometry by the introduction of curvature. Here, we present a staged channel design consisting of both curved and straight sections that combine to order particles into a single streamline with longitudinal spacing. We have evaluated the performance of these staged inertial focusing channels using standard flow cytometry methods that make use of calibration microspheres. Our analysis has determined the measurement precision and resolution, as a function of flow velocity and particle concentration that is provided by these channels. These devices were found to operate with increasing effectiveness at higher flow rates and particle concentrations, within the examined ranges, which is ideal for high throughput analysis. Further, the prototype flow cytometer equipped with an inertial focusing microchannel matched the resolution provided by a commercial hydrodynamic focusing flow cytometer. Most notably, our analysis indicates that the inertial focusing channels virtually eliminated particle coincidence at the analysis point. These properties suggest a potentially significant role for inertial focusing in the development of inexpensive flow cytometry-based diagnostics and in applications requiring the analysis of high particle concentrations.
C1 [Applegate, Robert W., Jr.; Arellano, Erik; Graves, Steven W.] Univ New Mexico, Dept Chem & Nucl Engn, Ctr Biomed Engn, Albuquerque, NM 87131 USA.
[Oakey, John; Toner, Mehmet] Shriners Hosp Children, Massachusetts Gen Hosp, BioMEMS Resource Ctr, Ctr Engn Med & Surg Serv, Boston, MA 02114 USA.
[Oakey, John; Toner, Mehmet] Harvard Univ, Sch Med, Boston, MA 02114 USA.
[Applegate, Robert W., Jr.; Graves, Steven W.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Di Carlo, Dino] Univ Calif Los Angeles, Dept Bioengn, Los Angeles, CA 90095 USA.
RP Graves, SW (reprint author), Univ New Mexico, Dept Chem & Nucl Engn, Ctr Biomed Engn, Albuquerque, NM 87131 USA.
EM graves@unm.edu; mtoner@hms.harvard.edu
FU NIH [P41EB002503, RR001315, RR020064, GM-060201]
FX J.O. and R.W.A., Jr. contributed equally to this work. This work was
supported by NIH-P41EB002503, NIH RR001315, and NIH RR020064. E.A. was
supported by NIH GM-060201. The authors wish to thank Octavio Hurtado
for microfabrication training and assistance.
NR 30
TC 97
Z9 97
U1 2
U2 52
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0003-2700
J9 ANAL CHEM
JI Anal. Chem.
PD MAY 1
PY 2010
VL 82
IS 9
BP 3862
EP 3867
DI 10.1021/ac100387b
PG 6
WC Chemistry, Analytical
SC Chemistry
GA 590GO
UT WOS:000277213400068
PM 20373755
ER
PT J
AU Zhou, J
Takahashi, LK
Wilson, KR
Leone, SR
Ahmed, M
AF Zhou, Jia
Takahashi, Lynelle K.
Wilson, Kevin R.
Leone, Stephen R.
Ahmed, Musahid
TI Internal Energies of Ion-Sputtered Neutral Tryptophan and Thymine
Molecules Determined by Vacuum Ultraviolet Photoionization
SO ANALYTICAL CHEMISTRY
LA English
DT Article
ID MASS-SPECTROMETRY; POST-IONIZATION; HIGH-RESOLUTION; METAL-CLUSTERS;
SECONDARY-ION; LASER-PULSES; LIGHT; SIMS; SPECTROSCOPY; BOMBARDMENT
AB Vacuum ultraviolet photoionization coupled to secondary neutral mass spectrometry (VUV-SNMS) of deposited tryptophan and thymine films are performed at the Chemical Dynamics Beam line. The resulting mass spectra show that while the intensity of the VUV-SNMS signal is lower than the corresponding secondary ion mass spectroscopy (SIMS) signal, the mass spectra are significantly simplified in VUV-SNMS. A detailed examination of tryptophan and thymine neutral molecules sputtered by 25 keV Bi(3)(+) indicates that the ion-sputtered parent molecules have similar to 2.5 eV of internal energy. While this internal energy shifts the appearance energy of the photofragment ions for both tryptophan and thymine, it does not change the characteristic photoionizaton efficiency (PIE) curves of thymine versus photon energy. Further analysis of the mass spectral signals indicate that approximately 80 neutral thymine molecules and 400 tryptophan molecules are sputtered per incident Bi(3)(+) ion. The simplified mass spectra and significant characteristic ion contributions to the VUV-SNMS spectra indicate the potential power of the technique for organic molecule surface analysis.
C1 [Zhou, Jia; Takahashi, Lynelle K.; Wilson, Kevin R.; Leone, Stephen R.; Ahmed, Musahid] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
[Takahashi, Lynelle K.; Leone, Stephen R.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Leone, Stephen R.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RP Ahmed, M (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, MS 6R-2100,1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM MAhmed@lbl.gov
RI Ahmed, Musahid/A-8733-2009
FU Director, Office of Energy Research, Office of Basic Energy Sciences,
and Chemical Sciences Division of the U.S. Department of Energy
[DE-AC02-05CH11231]
FX The authors would like to thank Prof. Ricardo Metz for providing the
Mathcad program to simulate the PIE curves of the metal systems and for
helpful discussions. We would also like to thank Corey Foster (ION-TOF
Inc.) for his continuing technical assistance. This work was supported
by the Director, Office of Energy Research, Office of Basic Energy
Sciences, and Chemical Sciences Division of the U.S. Department of
Energy under Contract No. DE-AC02-05CH11231.
NR 36
TC 10
Z9 10
U1 1
U2 13
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0003-2700
J9 ANAL CHEM
JI Anal. Chem.
PD MAY 1
PY 2010
VL 82
IS 9
BP 3905
EP 3913
DI 10.1021/ac1004629
PG 9
WC Chemistry, Analytical
SC Chemistry
GA 590GO
UT WOS:000277213400074
PM 20353160
ER
PT J
AU Butter, D
AF Butter, Daniel
TI N=1 conformal superspace in four dimensions
SO ANNALS OF PHYSICS
LA English
DT Article
DE Supergravity; Superspace; Conformal
ID MINIMAL SUPERGRAVITY; MULTIPLETS
AB We construct in detail an N = 1, D = 4 superspace with the superconformal algebra as the structure group and discuss its relation to prior component approaches and the existing Poincare superspaces. (C) 2009 Elsevier Inc. All rights reserved.
C1 [Butter, Daniel] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Butter, Daniel] Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA.
RP Butter, D (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM dbutter@berkeley.edu
NR 16
TC 28
Z9 28
U1 0
U2 0
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0003-4916
J9 ANN PHYS-NEW YORK
JI Ann. Phys.
PD MAY
PY 2010
VL 325
IS 5
BP 1026
EP 1080
DI 10.1016/j.aop.2009.09.010
PG 55
WC Physics, Multidisciplinary
SC Physics
GA 587FI
UT WOS:000276975000005
ER
PT J
AU Probst, A
Vaishampayan, P
Osman, S
Moissl-Eichinger, C
Andersen, GL
Venkateswaran, K
AF Probst, Alexander
Vaishampayan, Parag
Osman, Shariff
Moissl-Eichinger, Christine
Andersen, Gary L.
Venkateswaran, Kasthuri
TI Diversity of Anaerobic Microbes in Spacecraft Assembly Clean Rooms
SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY
LA English
DT Article
ID ENRICHMENT CULTURES; ENVIRONMENTS; MICROARRAY; IDENTIFICATION;
COMMUNITIES; CULTIVATION; RESISTANCE; BACTERIA; FACILITY; UNIFRAC
AB Although the cultivable and noncultivable microbial diversity of spacecraft assembly clean rooms has been previously documented using conventional and state-of-the-art molecular techniques, the occurrence of obligate anaerobes within these clean rooms is still uncertain. Therefore, anaerobic bacterial communities of three clean-room facilities were analyzed during assembly of the Mars Science Laboratory rover. Anaerobic bacteria were cultured on several media, and DNA was extracted from suitable anaerobic enrichments and examined with conventional 16S rRNA gene clone library, as well as high-density phylogenetic 16S rRNA gene microarray (PhyloChip) technologies. The culture-dependent analyses predominantly showed the presence of clostridial and propionibacterial strains. The 16S rRNA gene sequences retrieved from clone libraries revealed distinct microbial populations associated with each clean-room facility, clustered exclusively within gram-positive organisms. PhyloChip analysis detected a greater microbial diversity, spanning many phyla of bacteria, and provided a deeper insight into the microbial community structure of the clean-room facilities. This study presents an integrated approach for assessing the anaerobic microbial population within clean-room facilities, using both molecular and cultivation-based analyses. The results reveal that highly diverse anaerobic bacterial populations persist in the clean rooms even after the imposition of rigorous maintenance programs and will pose a challenge to planetary protection implementation activities.
C1 [Probst, Alexander; Vaishampayan, Parag; Venkateswaran, Kasthuri] CALTECH, Jet Prop Lab, Biotechnol & Planetary Protect Grp, Pasadena, CA 91109 USA.
[Osman, Shariff; Andersen, Gary L.] Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Environm Biotechnol, Berkeley, CA 94720 USA.
[Moissl-Eichinger, Christine] Univ Regensburg, Lehrstuhl Mikrobiol, D-93053 Regensburg, Germany.
[Moissl-Eichinger, Christine] Univ Regensburg, Archaeenzentrum, D-93053 Regensburg, Germany.
RP Venkateswaran, K (reprint author), CALTECH, Jet Prop Lab, Biotechnol & Planetary Protect Grp, M-S 89-2,4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM kjvenkat@jpl.nasa.gov
RI Moissl-Eichinger, Christine/A-6682-2015; Andersen, Gary/G-2792-2015
OI Moissl-Eichinger, Christine/0000-0001-6755-6263; Andersen,
Gary/0000-0002-1618-9827
FU National Aeronautics and Space Administration; Mars Program Office at
the JPL
FX The research described in this publication was carried out at the Jet
Propulsion Laboratory (JPL), California Institute of Technology, under a
contract with the National Aeronautics and Space Administration. This
research was funded by the Mars Program Office at the JPL.; We are
grateful to K. Buxbaum for funding, to J. A. Spry for proofreading and
critique of the manuscript, to S. Foster for editing, and to all of the
members of the JPL Biotechnology and Planetary Protection Group for
technical assistance. We especially thank Wayne Schubert for assistance
and maintenance of the anaerobic glove box and J. Nick Benardini for
sampling MSL components and assembly facilities. We are also grateful to
Todd DeSantis at Lawrence Berkeley National Laboratory for his input on
PhyloChip analysis and for use of the Greengenes suite of molecular
analysis tools (http://greengenes.lbl.gov).
NR 42
TC 28
Z9 28
U1 0
U2 9
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0099-2240
J9 APPL ENVIRON MICROB
JI Appl. Environ. Microbiol.
PD MAY
PY 2010
VL 76
IS 9
BP 2837
EP 2845
DI 10.1128/AEM.02167-09
PG 9
WC Biotechnology & Applied Microbiology; Microbiology
SC Biotechnology & Applied Microbiology; Microbiology
GA 586KP
UT WOS:000276907400019
PM 20228115
ER
PT J
AU Jiao, YQ
Cody, GD
Harding, AK
Wilmes, P
Schrenk, M
Wheeler, KE
Banfield, JF
Thelen, MP
AF Jiao, Yongqin
Cody, George D.
Harding, Anna K.
Wilmes, Paul
Schrenk, Matthew
Wheeler, Korin E.
Banfield, Jillian F.
Thelen, Michael P.
TI Characterization of Extracellular Polymeric Substances from Acidophilic
Microbial Biofilms
SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY
LA English
DT Article
ID ACID-MINE DRAINAGE; COMMUNITY PROTEOMICS; 2 EXOPOLYSACCHARIDES;
PSEUDOMONAS SP; BACTERIA; MATRIX; STRAIN; EPS; ENVIRONMENT; EXTRACTION
AB We examined the chemical composition of extracellular polymeric substances (EPS) extracted from two natural microbial pellicle biofilms growing on acid mine drainage (AMD) solutions. The EPS obtained from a mid-developmental-stage biofilm (DS1) and a mature biofilm (DS2) were qualitatively and quantitatively compared. More than twice as much EPS was derived from DS2 as from DS1 (approximately 340 and 150 mg of EPS per g [dry weight] for DS2 and DS1, respectively). Composition analyses indicated the presence of carbohydrates, metals, proteins, and minor quantities of DNA and lipids, although the relative concentrations of these components were different for the two EPS samples. EPS from DS2 contained higher concentrations of metals and carbohydrates than EPS from DS1. Fe was the most abundant metal in both samples, accounting for about 73% of the total metal content, followed by Al, Mg, and Zn. The relative concentration profile for these metals resembled that for the AMD solution in which the biofilms grew, except for Si, Mn, and Co. Glycosyl composition analysis indicated that both EPS samples were composed primarily of galactose, glucose, heptose, rhamnose, and mannose, while the relative amounts of individual sugars were substantially different in DS1 and DS2. Additionally, carbohydrate linkage analysis revealed multiply linked heptose, galactose, glucose, mannose, and rhamnose, with some of the glucose in a 4-linked form. These results indicate that the biochemical composition of the EPS from these acidic biofilms is dependent on maturity and is controlled by the microbial communities, as well as the local geochemical environment.
C1 [Jiao, Yongqin; Harding, Anna K.; Wheeler, Korin E.; Thelen, Michael P.] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94550 USA.
[Cody, George D.] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA.
[Wilmes, Paul; Banfield, Jillian F.] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
[Schrenk, Matthew] E Carolina Univ, Dept Biol, Greenville, NC 27858 USA.
RP Thelen, MP (reprint author), Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, POB 808,L-452, Livermore, CA 94550 USA.
EM mthelen@llnl.gov
RI Thelen, Michael/C-6834-2008; Thelen, Michael/G-2032-2014; Wilmes,
Paul/B-1707-2017
OI Thelen, Michael/0000-0002-2479-5480; Thelen,
Michael/0000-0002-2479-5480; Wilmes, Paul/0000-0002-6478-2924
FU U.S. Department of Energy Office of Science [DE-FG02-05ER64134]; U.S.
Department of Energy [DE-AC52-07NA27344]; W.M. Keck Foundation; NSF;
Carnegie Institution of Washington
FX Funding for this study was provided by U.S. Department of Energy Office
of Science, Genome Sciences Program grant DE-FG02-05ER64134. Work at
Lawrence Livermore National Laboratory was performed under the auspices
of the U.S. Department of Energy under contract DE-AC52-07NA27344. The
W. M. Keck Solid State NMR facility at the Geophysical Laboratory,
Carnegie Institution of Washington, received support from the W.M. Keck
Foundation, the NSF, and the Carnegie Institution of Washington.
NR 42
TC 52
Z9 52
U1 9
U2 53
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0099-2240
J9 APPL ENVIRON MICROB
JI Appl. Environ. Microbiol.
PD MAY
PY 2010
VL 76
IS 9
BP 2916
EP 2922
DI 10.1128/AEM.02289-09
PG 7
WC Biotechnology & Applied Microbiology; Microbiology
SC Biotechnology & Applied Microbiology; Microbiology
GA 586KP
UT WOS:000276907400027
PM 20228116
ER
PT J
AU Field, EK
D'Imperio, S
Miller, AR
VanEngelen, MR
Gerlach, R
Lee, BD
Apel, WA
Peyton, BM
AF Field, Erin K.
D'Imperio, Seth
Miller, Amber R.
VanEngelen, Michael R.
Gerlach, Robin
Lee, Brady D.
Apel, William A.
Peyton, Brent M.
TI Application of Molecular Techniques To Elucidate the Influence of
Cellulosic Waste on the Bacterial Community Structure at a Simulated
Low-Level-Radioactive-Waste Site
SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY
LA English
DT Article
ID 16S RIBOSOMAL-RNA; SP-NOV; DISPOSAL SITES; CONTAMINATED SOILS; CLONE
LIBRARY; GEN. NOV.; REDUCTION; URANIUM; RADIONUCLIDE; DIVERSITY
AB Low-level-radioactive-waste (low-level-waste) sites, including those at various U. S. Department of Energy sites, frequently contain cellulosic waste in the form of paper towels, cardboard boxes, or wood contaminated with heavy metals and radionuclides such as chromium and uranium. To understand how the soil microbial community is influenced by the presence of cellulosic waste products, multiple soil samples were obtained from a nonradioactive model low-level-waste test pit at the Idaho National Laboratory. Samples were analyzed using 16S rRNA gene clone libraries and 16S rRNA gene microarray (PhyloChip) analyses. Both methods revealed changes in the bacterial community structure with depth. In all samples, the PhyloChip detected significantly more operational taxonomic units, and therefore relative diversity, than the clone libraries. Diversity indices suggest that diversity is lowest in the fill and fill-waste interface (FW) layers and greater in the wood waste and waste-clay interface layers. Principal-coordinate analysis and lineage-specific analysis determined that the Bacteroidetes and Actinobacteria phyla account for most of the significant differences observed between the layers. The decreased diversity in the FW layer and increased members of families containing known cellulose-degrading microorganisms suggest that the FW layer is an enrichment environment for these organisms. These results suggest that the presence of the cellulosic material significantly influences the bacterial community structure in a stratified soil system.
C1 [D'Imperio, Seth; VanEngelen, Michael R.; Gerlach, Robin; Peyton, Brent M.] Montana State Univ, Dept Chem & Biol Engn, Bozeman, MT 59717 USA.
[Field, Erin K.; D'Imperio, Seth; VanEngelen, Michael R.; Gerlach, Robin; Peyton, Brent M.] Montana State Univ, Ctr Biofilm Engn, Bozeman, MT 59717 USA.
[Miller, Amber R.; Lee, Brady D.; Apel, William A.] Idaho Natl Lab, Biol Syst Dept, Idaho Falls, ID 83415 USA.
[Field, Erin K.] Montana State Univ, Dept Microbiol, Bozeman, MT 59717 USA.
RP Peyton, BM (reprint author), Montana State Univ, Dept Chem & Biol Engn, Cobleigh 305, Bozeman, MT 59717 USA.
EM bpeyton@coe.montana.edu
RI Gerlach, Robin/A-9474-2012; Peyton, Brent/G-5247-2015
OI Peyton, Brent/0000-0003-0033-0651
FU U.S. DOE, Office of Science [DE-FG02-06ER64206, DE-AC07-05ID14517]
FX The Montana State University portion of this work was supported by the
U.S. DOE, Office of Science, Environmental Remediation Science Program
(ERSP), contract DE-FG02-06ER64206. The INL portion of the work was
supported by the U. S. DOE, Assistant Secretary for the Office of
Science, ERSP, under DOE-NE Idaho Operations Office contract
DE-AC07-05ID14517.
NR 61
TC 19
Z9 19
U1 0
U2 10
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0099-2240
J9 APPL ENVIRON MICROB
JI Appl. Environ. Microbiol.
PD MAY
PY 2010
VL 76
IS 10
BP 3106
EP 3115
DI 10.1128/AEM.01688-09
PG 10
WC Biotechnology & Applied Microbiology; Microbiology
SC Biotechnology & Applied Microbiology; Microbiology
GA 592OF
UT WOS:000277388200005
PM 20305022
ER
PT J
AU Green, SJ
Prakash, O
Gihring, TM
Akob, DM
Jasrotia, P
Jardine, PM
Watson, DB
Brown, SD
Palumbo, AV
Kostka, JE
AF Green, Stefan J.
Prakash, Om
Gihring, Thomas M.
Akob, Denise M.
Jasrotia, Puja
Jardine, Philip M.
Watson, David B.
Brown, Steven D.
Palumbo, Anthony V.
Kostka, Joel E.
TI Denitrifying Bacteria Isolated from Terrestrial Subsurface Sediments
Exposed to Mixed-Waste Contamination
SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY
LA English
DT Article
ID 16S RIBOSOMAL-RNA; SP-NOV.; NITRITE REDUCTASE; GEN. NOV.;
BRADYRHIZOBIUM-JAPONICUM; CULTIVATED DENITRIFIERS;
ENVIRONMENTAL-SAMPLES; MICROBIAL COMMUNITIES; MOLECULAR DIVERSITY; U(VI)
REDUCTION
AB In terrestrial subsurface environments where nitrate is a critical groundwater contaminant, few cultivated representatives are available to verify the metabolism of organisms that catalyze denitrification. In this study, five species of denitrifying bacteria from three phyla were isolated from subsurface sediments exposed to metal radionuclide and nitrate contamination as part of the U. S. Department of Energy's Oak Ridge Integrated Field Research Challenge (OR-IFRC). Isolates belonged to the genera Afipia and Hyphomicrobium (Alphaproteobacteria), Rhodanobacter (Gammaproteobacteria), Intrasporangium (Actinobacteria), and Bacillus (Firmicutes). Isolates from the phylum Proteobacteria were complete denitrifiers, whereas the Gram-positive isolates reduced nitrate to nitrous oxide. rRNA gene analyses coupled with physiological and genomic analyses suggest that bacteria from the genus Rhodanobacter are a diverse population of denitrifiers that are circumneutral to moderately acidophilic, with a high relative abundance in areas of the acidic source zone at the OR-IFRC site. Based on genome analysis, Rhodanobacter species contain two nitrite reductase genes and have not been detected in functional-gene surveys of denitrifying bacteria at the OR-IFRC site. Nitrite and nitrous oxide reductase gene sequences were recovered from the isolates and from the terrestrial subsurface by designing primer sets mined from genomic and metagenomic data and from draft genomes of two of the isolates. We demonstrate that a combination of cultivation and genomic and metagenomic data is essential to the in situ characterization of denitrifiers and that current PCR-based approaches are not suitable for deep coverage of denitrifiers. Our results indicate that the diversity of denitrifiers is significantly underestimated in the terrestrial subsurface.
C1 [Green, Stefan J.; Prakash, Om; Gihring, Thomas M.; Akob, Denise M.; Jasrotia, Puja; Kostka, Joel E.] Florida State Univ, Dept Oceanog, Tallahassee, FL 32306 USA.
[Jardine, Philip M.; Watson, David B.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
[Brown, Steven D.; Palumbo, Anthony V.] Oak Ridge Natl Lab, Biosci Div, Oak Ridge, TN USA.
RP Kostka, JE (reprint author), Florida State Univ, Dept Oceanog, 1060 Atom Way,Bldg 42, Tallahassee, FL 32306 USA.
EM jkostka@ocean.fsu.edu
RI Palumbo, Anthony/A-4764-2011; Green, Stefan/C-8980-2011; Akob,
Denise/D-9478-2013; Watson, David/C-3256-2016; Brown,
Steven/A-6792-2011;
OI Palumbo, Anthony/0000-0002-1102-3975; Watson, David/0000-0002-4972-4136;
Brown, Steven/0000-0002-9281-3898; Green, Stefan/0000-0003-2781-359X;
Akob, Denise/0000-0003-1534-3025
FU Office of Science (BER), U.S. Department of Energy [DE-FG02-07ER64373,
DE-AC05-00OR22725]
FX This research was supported by the Office of Science (BER), U.S.
Department of Energy, grant DE-FG02-07ER64373, and by the Integrated
Field-Scale Subsurface Research Challenge at Oak Ridge, operated by the
Environmental Sciences Division, Oak Ridge National Laboratory (ORNL),
under U.S. Department of Energy contract DE-AC05-00OR22725.
NR 66
TC 57
Z9 61
U1 5
U2 39
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0099-2240
J9 APPL ENVIRON MICROB
JI Appl. Environ. Microbiol.
PD MAY
PY 2010
VL 76
IS 10
BP 3244
EP 3254
DI 10.1128/AEM.03069-09
PG 11
WC Biotechnology & Applied Microbiology; Microbiology
SC Biotechnology & Applied Microbiology; Microbiology
GA 592OF
UT WOS:000277388200020
PM 20305024
ER
PT J
AU Ghosal, S
Leighton, TJ
Wheeler, KE
Hutcheon, ID
Weber, PK
AF Ghosal, Sutapa
Leighton, Terrance J.
Wheeler, Katherine E.
Hutcheon, Ian D.
Weber, Peter K.
TI Spatially Resolved Characterization of Water and Ion Incorporation in
Bacillus Spores
SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY
LA English
DT Article
ID X-RAY-MICROANALYSIS; FLIGHT MASS-SPECTROMETRY; BACTERIAL-SPORES;
MICROBIAL FORENSICS; CELL-WALL; ELEMENTAL CHARACTERIZATION; EFFLUENT
RETENTION; SUBTILIS; PERMEABILITY; MEGATERIUM
AB We present the first direct visualization and quantification of water and ion uptake into the core of individual dormant Bacillus thuringiensis subsp. israelensis (B. thuringiensis subsp. israelensis) endospores. Isotopic and elemental gradients in the B. thuringiensis subsp. israelensis spores show the permeation and incorporation of deuterium in deuterated water (D(2)O) and solvated ions throughout individual spores, including the spore core. Under hydrated conditions, incorporation into a spore occurs on a time scale of minutes, with subsequent uptake of the permeating species continuing over a period of days. The distribution of available adsorption sites is shown to vary with the permeating species. Adsorption sites for Li(+), Cs(+), and Cl(-) are more abundant within the spore outer structures (exosporium, coat, and cortex) relative to the core, while F(-) adsorption sites are more abundant in the core. The results presented here demonstrate that elemental abundance and distribution in dormant spores are influenced by the ambient environment. As such, this study highlights the importance of understanding how microbial elemental and isotopic signatures can be altered postproduction, including during sample preparation for analysis, and therefore, this study is immediately relevant to the use of elemental and isotopic markers in environmental microbiology and microbial forensics.
C1 [Ghosal, Sutapa; Hutcheon, Ian D.; Weber, Peter K.] Lawrence Livermore Natl Lab, Div Chem Sci, Livermore, CA 94550 USA.
[Leighton, Terrance J.; Wheeler, Katherine E.] Childrens Hosp Oakland, Res Inst, Oakland, CA 94609 USA.
RP Weber, PK (reprint author), 7000 East Ave,L-231, Livermore, CA 94550 USA.
EM weber21@llnl.gov
FU U.S. Department of Energy at Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]; Laboratory Directed Research and Development, LLNL;
Federal Bureau of Investigation; Department of Homeland Security
FX This work was performed under the auspices of the U.S. Department of
Energy at Lawrence Livermore National Laboratory under contract
DE-AC52-07NA27344, with financial support from Laboratory Directed
Research and Development, LLNL; the Federal Bureau of Investigation; and
the Department of Homeland Security.
NR 56
TC 19
Z9 19
U1 1
U2 13
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0099-2240
J9 APPL ENVIRON MICROB
JI Appl. Environ. Microbiol.
PD MAY
PY 2010
VL 76
IS 10
BP 3275
EP 3282
DI 10.1128/AEM.02485-09
PG 8
WC Biotechnology & Applied Microbiology; Microbiology
SC Biotechnology & Applied Microbiology; Microbiology
GA 592OF
UT WOS:000277388200023
PM 20348293
ER
PT J
AU Bochner, B
Gomez, V
Ziman, M
Yang, SH
Brown, SD
AF Bochner, Barry
Gomez, Vanessa
Ziman, Michael
Yang, Shihui
Brown, Steven D.
TI Phenotype MicroArray Profiling of Zymomonas mobilis ZM4
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article
DE Ethanol; Fermentation; Physiology; Systems biology; Global
ID FUEL ETHANOL; BIOFUELS; ARABINOSE; BACTERIA; GLUCOSE; PATHWAY; STRAIN
AB In this study, we developed a Phenotype MicroArray (TM) (PM) protocol to profile cellular phenotypes in Zymomonas mobilis, which included a standard set of nearly 2,000 assays for carbon, nitrogen, phosphorus and sulfur source utilization, nutrient stimulation, pH and osmotic stresses, and chemical sensitivities with 240 inhibitory chemicals. We observed two positive assays for C-source utilization (fructose and glucose) using the PM screen, which uses redox chemistry and cell respiration as a universal reporter to profile growth phenotypes in a high-throughput 96-well plate-based format. For nitrogen metabolism, the bacterium showed a positive test results for ammonia, aspartate, asparagine, glutamate, glutamine, and peptides. Z. mobilis appeared to use a diverse array of P-sources with two exceptions being pyrophosphate and tripolyphosphate. The assays suggested that Z. mobilis uses both inorganic and organic compounds as S-sources. No stimulation by nutrients was detected; however, there was evidence of partial inhibition by purines and pyrimidines, NAD, and deferoxamine. Z. mobilis was relatively resistant to acid pH, tolerating a pH down to about 4.0. It also tolerated phosphate, sulfate, and nitrate, but was rather sensitive to chloride and nitrite. Z. mobilis showed resistance to a large number of diverse chemicals that inhibit most bacteria. The information from PM analysis provides an overview of Z. mobilis physiology and a foundation for future comparisons of other wild-type and mutant Z. mobilis strains.
C1 [Bochner, Barry; Gomez, Vanessa; Ziman, Michael] Biolog Inc, Hayward, CA 94545 USA.
[Yang, Shihui; Brown, Steven D.] Oak Ridge Natl Lab, Biosci Div, Microbial Ecol & Physiol Grp, Oak Ridge, TN 37831 USA.
[Yang, Shihui; Brown, Steven D.] Oak Ridge Natl Lab, Biosci Div, BioEnergy Sci Ctr, Oak Ridge, TN 37831 USA.
RP Bochner, B (reprint author), Biolog Inc, 21124 Cabot Blvd, Hayward, CA 94545 USA.
EM bbochner@biolog.com; brownsd@ornl.gov
RI YANG, SHIHUI/A-6526-2008; Brown, Steven/A-6792-2011
OI YANG, SHIHUI/0000-0002-9394-9148; Brown, Steven/0000-0002-9281-3898
FU Laboratory Directed Research and Development Program of Oak Ridge
National Laboratory (ORNL); US Department of Energy [DE-AC05-00OR22725];
NIH-NIGMS [R42 GM073965]
FX We thank Courtney Johnson for assistance in conducting sucrose growth
tests. Research sponsored by the Laboratory Directed Research and
Development Program of Oak Ridge National Laboratory (ORNL), managed by
UT-Battelle, LLC for the US Department of Energy under contract no.
DE-AC05-00OR22725. The BioEnergy Science Center is a US Department of
Energy Bioenergy Research Center supported by the Office of Biological
and Environmental Research in the DOE Office of Science. Protocol
development for Zymomonas was aided by funding provided to Barry Bochner
and Biolog under STTR grant R42 GM073965 from NIH-NIGMS.
NR 24
TC 16
Z9 16
U1 0
U2 6
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD MAY
PY 2010
VL 161
IS 1-8
BP 116
EP 123
DI 10.1007/s12010-009-8842-2
PG 8
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA 567NX
UT WOS:000275455000011
PM 20012508
ER
PT J
AU Liu, WJ
Bevan, DR
Zhang, YHP
AF Liu, Wenjin
Bevan, David R.
Zhang, Y. -H. Percival
TI The Family 1 Glycoside Hydrolase from Clostridium cellulolyticum H10 is
a Cellodextrin Glucohydrolase
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article
DE Beta-galactosidase; Beta-glucosidase; Clostridium cellulolyticum;
Consolidated bioprocessing; Cellodextrin glucohydrolase; Cellulose
hydrolysis; Microbial cellulose utilization
ID THERMOSTABLE BETA-GLUCOSIDASE; 1,4-BETA-D-GLUCAN GLUCOHYDROLASE;
CELLULOSE UTILIZATION; THERMOCELLUM; HYDROLYSIS; CELLOBIOSE; HYDROGEN;
ECONOMY; CLONING
AB The only family 1 glycoside hydrolase in Clostridium cellulolyticum H10 (CcGH1) is annotated as a beta-galactosidase but has high sequence homology with many beta-glucosidases. Given the possible importance of beta-glucosidase in cellulose utilization by C. cellulolyticum, the encoding open reading frame Ccel_0374 was cloned and expressed in E. coli as a soluble fusion protein with thioredoxin. After tag cleavage, the purified enzyme had a molecular mass of 52 kDa and was active in dimeric form on a broad range of substrates, including cellobiose, cellotriose, cellotetraose, p-nitrophenyl-beta-glucopyranoside, lactose, and o-nitrophenyl-beta-galactopyranoside. The enzyme showed lower K (m) and higher catalytic efficiency (k (cat)/K (m)) on cellodextrins with degree of polymerization from 2 to 4 than on lactose, and the k (cat)/K (m) values on cellodextrins increased in the order of cellobiose < cellotriose < cellotetraose, suggesting that CcGH1 was a cellodextrin glucohydrolase (EC 3.2.1.74). The high K (m) (69 mM) on cellobiose implies that CcGH1 likely has a minimal role in the intracellular hydrolysis of cellobiose in C. cellulolyticum. The three-dimensional structure model of CcGH1 generated by homology modeling showed a typical (alpha/beta)(8) barrel topology characteristic of family 1 glycoside hydrolases.
C1 [Zhang, Y. -H. Percival] DOE BioEnergy Sci Ctr BESC, Oak Ridge, TN 37831 USA.
[Zhang, Y. -H. Percival] Virginia Polytech Inst & State Univ, ICTAS, Blacksburg, VA 24061 USA.
[Bevan, David R.] Virginia Polytech Inst & State Univ, Dept Biochem, Blacksburg, VA 24061 USA.
[Liu, Wenjin; Zhang, Y. -H. Percival] Virginia Polytech Inst & State Univ, Dept Biol Syst Engn, Blacksburg, VA 24061 USA.
RP Zhang, YHP (reprint author), DOE BioEnergy Sci Ctr BESC, Oak Ridge, TN 37831 USA.
EM ypzhang@vt.edu
FU DOE BioEnergy Science Center; USDA Bioprocessing and Biodesign Center
as; DuPont Young Professor Award
FX This work was supported mainly by the DOE BioEnergy Science Center and
partially by the USDA Bioprocessing and Biodesign Center as well as the
DuPont Young Professor Award.
NR 28
TC 2
Z9 2
U1 0
U2 2
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD MAY
PY 2010
VL 161
IS 1-8
BP 264
EP 273
DI 10.1007/s12010-009-8782-x
PG 10
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA 567NX
UT WOS:000275455000025
PM 19816661
ER
PT J
AU Sen, AK
Litak, G
Finney, CEA
Daw, CS
Wagner, RM
AF Sen, A. K.
Litak, G.
Finney, C. E. A.
Daw, C. S.
Wagner, R. M.
TI Analysis of heat release dynamics in an internal combustion engine using
multifractals and wavelets
SO APPLIED ENERGY
LA English
DT Article
DE Combustion; Engine; Wavelets; Multifractals
ID SPARK-IGNITION ENGINE; TO-CYCLE VARIATIONS; NONLINEAR DYNAMICS;
PRESSURE; OSCILLATIONS; INTERMITTENCY; TURBULENCE; RECORDS
AB In this paper we analyze data from previously reported experimental measurements of cycle-to-cycle combustion variations in a lean-fueled, multi-cylinder spark-ignition (SI) engine. We characterize the changes in the observed combustion dynamics with as-fed fuel-air ratio using conventional histograms and statistical moments, and we further characterize the shifts in combustion complexity in terms of multifractals and wavelet decomposition. Changes in the conventional statistics and multifractal structure indicate trends with fuel-air ratio that parallel earlier reported observations. Wavelet decompositions reveal persistent, non-stochastic oscillation modes at higher fuel-air ratios that were not obvious in previous analyses. Recognition of these long-time-scale, non-stochastic oscillations is expected to be useful for improving modelling and control of engine combustion variations and multi-cylinder balancing. (C) 2009 Elsevier Ltd. All rights reserved.
C1 [Litak, G.] Tech Univ Lublin, Dept Appl Mech, PL-20618 Lublin, Poland.
[Sen, A. K.] Indiana Univ, Dept Math Sci, Indianapolis, IN 46202 USA.
[Finney, C. E. A.; Daw, C. S.; Wagner, R. M.] Oak Ridge Natl Lab, Energy & Transportat Sci Div, Knoxville, TN 37932 USA.
RP Litak, G (reprint author), Tech Univ Lublin, Dept Appl Mech, Nadbystrzycka 36, PL-20618 Lublin, Poland.
EM g.litak@pollub.pl
RI Litak, Grzegorz/F-2081-2010; Mechaniczna, Biblioteka/A-4394-2013
OI Litak, Grzegorz/0000-0002-9647-8345;
FU US Department of Energy, Office of Energy Research
FX This work was supported by the US Department of Energy, Office of Energy
Research. G. Litak would like to thank Prof. A.K. Sen and Prof. C.S. Daw
for their hospitality during his visits to Indiana and Oak Ridge.
NR 42
TC 20
Z9 20
U1 2
U2 7
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0306-2619
J9 APPL ENERG
JI Appl. Energy
PD MAY
PY 2010
VL 87
IS 5
BP 1736
EP 1743
DI 10.1016/j.apenergy.2009.11.009
PG 8
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA 560ZC
UT WOS:000274943400029
ER
PT J
AU Lanza, NL
Wiens, RC
Clegg, SM
Ollila, AM
Humphries, SD
Newsom, HE
Barefield, JE
AF Lanza, Nina L.
Wiens, Roger C.
Clegg, Samuel M.
Ollila, Ann M.
Humphries, Seth D.
Newsom, Horton E.
Barefield, James E.
CA ChemCam Team
TI Calibrating the ChemCam laser-induced breakdown spectroscopy instrument
for carbonate minerals on Mars
SO APPLIED OPTICS
LA English
DT Article
ID EXPLORATION
AB The ChemCam instrument suite onboard the NASA Mars Science Laboratory rover includes the first laser-induced breakdown spectroscopy (LIBS) instrument for extraterrestrial applications. Here we examine carbonate minerals in a simulated martian environment to better understand the LIBS signature of these materials on Mars. Both chemical composition and rock type are determined using multivariate analysis techniques. Composition is confirmed using scanning electron microscopy. Our results show that ChemCam can recognize and differentiate between different types of carbonate materials on Mars. (C) 2010 Optical Society of America
C1 [Lanza, Nina L.; Ollila, Ann M.] Univ New Mexico, Inst Meteorit, Albuquerque, NM 87131 USA.
[Wiens, Roger C.] Los Alamos Natl Lab, ISR 1, Los Alamos, NM 87544 USA.
[Clegg, Samuel M.; Humphries, Seth D.; Barefield, James E.] Los Alamos Natl Lab, C PCS, Los Alamos, NM 87544 USA.
RP Lanza, NL (reprint author), MSC03 2050,1 Univ New Mexico, Albuquerque, NM 87131 USA.
EM nlanza@unm.edu
OI Barefield, James/0000-0001-8674-6214; Clegg, Sam/0000-0002-0338-0948
FU NASA [NNH07DA001N]; Zonta International Amelia Earhart Fellowship
FX Thanks to M. Spilde for assistance with SEM work, to two anonymous
reviewers for their helpful comments, and to the NASA Mars Program for
ChemCam support. N. L. Lanza acknowledges the support of the NASA
Graduate Student Research Program and the Zonta International Amelia
Earhart Fellowship. H. E. Newsom is supported by NASA Planetary Geology
and Geophysics grant NNH07DA001N.
NR 20
TC 38
Z9 39
U1 0
U2 14
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD MAY 1
PY 2010
VL 49
IS 13
BP C211
EP C217
DI 10.1364/AO.49.00C211
PG 7
WC Optics
SC Optics
GA 590HZ
UT WOS:000277217400046
ER
PT J
AU Martin, MZ
Stewart, AJ
Gwinn, KD
Waller, JC
AF Martin, Madhavi Z.
Stewart, Arthur J.
Gwinn, Kimberley D.
Waller, John C.
TI Laser-induced breakdown spectroscopy used to detect endophyte-mediated
accumulation of metals by tall fescue
SO APPLIED OPTICS
LA English
DT Article
ID NEOTYPHODIUM-COENOPHIALUM; ALUMINUM TOLERANCE; MINERAL UPTAKE;
REPRODUCTION; SPECTROMETRY; INFESTATION; DISEASE; TISSUES; STRESS
AB Laser-induced breakdown spectroscopy (LIBS) was used to determine the impact of endophyte (Neotyphodium sp.) infection on elemental composition of tall fescue (Festuca arundinacea). Leaf material from endophyte-infected (E+) and endophyte-free (E-) tall fescue populations in established plots was examined. Leaf-tissue digestates were also tested for metals, by inductively coupled plasma (ICP) mass spectrometry (MS). Seven of eleven metals (Ca, Mg, Fe, Mn, Cu, Ni, and Zn) were measured by both techniques at concentrations great enough for a reliable comparison. Mg, Zn, and Cd, a toxic metal that can be present in forage, were readily detected by LIBS, even though Cd concentrations in the plants were below levels typically achieved using ICP MS detection. Implications of these results for research on forage analysis and phytoremediation are discussed. (C) 2010 Optical Society of America
C1 [Martin, Madhavi Z.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
[Stewart, Arthur J.] Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA.
[Gwinn, Kimberley D.] Univ Tennessee, Dept Entomol & Plant Pathol, Knoxville, TN 37996 USA.
[Waller, John C.] Univ Tennessee, Dept Anim Sci, Knoxville, TN 37996 USA.
RP Martin, MZ (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA.
EM martinm1@ornl.gov
RI Martin, Madhavi/A-5268-2011;
OI stewart, arthur/0000-0003-1968-5997; Martin, Madhavi/0000-0002-6677-2180
FU Oak Ridge National Laboratory (ORNL); U.S. Department of Energy
[DER-AC05-00OR22725]
FX This research was sponsored by the Laboratory Directed Research and
Development Program of Oak Ridge National Laboratory (ORNL). ORNL is
managed by University of Tennessee-Battelle, LLC, for the U.S.
Department of Energy under contract DER-AC05-00OR22725. Kirk Hyder, Jana
Tarver, Suzanne Fisher, Belinda Beane, and Kenneth Lowe provided
excellent technical assistance on short notice. The manuscript was
improved by suggestions and comments provided by Stan Wullschleger and
Cynthia Kendrick.
NR 30
TC 7
Z9 7
U1 1
U2 9
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD MAY 1
PY 2010
VL 49
IS 13
BP C161
EP C167
DI 10.1364/AO.49.00C161
PG 7
WC Optics
SC Optics
GA 590HZ
UT WOS:000277217400041
ER
PT J
AU Owens, T
Mao, SS
Canfield, EK
Grigoropoulos, CP
Mao, XL
Russo, RE
AF Owens, Travis
Mao, Samuel S.
Canfield, Erin K.
Grigoropoulos, Costas P.
Mao, Xianglei
Russo, Richard E.
TI Ultrafast thin-film laser-induced breakdown spectroscopy of doped oxides
SO APPLIED OPTICS
LA English
DT Article
ID FEMTOSECOND PULSE LASER; ABLATION; SILICON; ENERGY
AB Single-shot femtosecond laser induced breakdown spectroscopy (LIBS) has been shown to be an effective means of detecting heavy metal dopants in porous thin films. Traditional LIBS analysis of trace dopants in modern painted surfaces or TiO2 films is difficult due to the broad noisy spectra of the titanium constituent and interference due to the substrate material. Femtosecond laser pulses provide excellent ablation of the target material with little damage to the underlying substrate. In this study a Ti:sapphire femtosecond laser pulse operated at 800 and 266 nm wavelengths and an Nd:YAG nanosecond laser operated at 266 nm were used to ablate 0.15-15 mu m films of TiO2 doped with varying amounts of MgO. This application shows excellent detection of Mg down to 60 ppm with little interference by the substrate material. (C) 2010 Optical Society of America
C1 [Owens, Travis; Mao, Samuel S.; Canfield, Erin K.; Grigoropoulos, Costas P.; Mao, Xianglei; Russo, Richard E.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Owens, Travis; Mao, Samuel S.; Canfield, Erin K.; Grigoropoulos, Costas P.] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA.
RP Russo, RE (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM RERusso@lbl.gov
FU National Defense Science and Engineering Graduate Fellowship; Chemical
Science Division, Office of Basic Energy Sciences, U.S. Department of
Energy (DOE) [DE-AC02-05CH11231]
FX The authors thank the National Defense Science and Engineering Graduate
Fellowship, and the Chemical Science Division, Office of Basic Energy
Sciences, U.S. Department of Energy (DOE), under contract
DE-AC02-05CH11231.
NR 14
TC 4
Z9 4
U1 3
U2 15
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD MAY 1
PY 2010
VL 49
IS 13
BP C67
EP C69
DI 10.1364/AO.49.000C67
PG 3
WC Optics
SC Optics
GA 590HZ
UT WOS:000277217400029
ER
PT J
AU Leon, Y
Sciau, P
Goudeau, P
Tamura, N
Webb, S
Mehta, A
AF Leon, Y.
Sciau, P.
Goudeau, P.
Tamura, N.
Webb, S.
Mehta, A.
TI The nature of marbled Terra Sigillata slips: a combined mu XRF and mu
XRD investigation
SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
LA English
DT Article
ID X-RAY-DIFFRACTION
AB In addition to the red terra sigillata production, the largest Gallic workshop (La Graufesenque) made a special type of terra sigillata, called "marbled" by the archaeologists. Produced exclusively at this site, this pottery is characterized by a surface finish made of a mixture of yellow and red slips. Because the two slips are intimately mixed, it is difficult to obtain the precise composition of one of the two constituents without contamination from the other. In order to obtain very precise correlation at the appropriate scale between the color aspect and the elemental and mineralogical phase distributions in the slip, combined electron microprobe, X-ray micro spectroscopies and micro diffraction on cross-sectional samples were performed. The aim of this study is to discover how potters were able to produce this unique type of terra sigillata and especially this particular slip of an intense yellow color. Results show that the yellow component of marbled sigillata was made from a titanium-rich clay preparation. The color is due to the formation of a pseudobrookite (TiFe(2)O(5)) phase in the yellow part of the slip, the main characteristics of that structure being considered nowadays as essential for the fabrication of stable yellow ceramic pigments. Its physical properties such as high refractive indices and a melting point higher than that of most silicates widely used as ceramic colorants are indeed determinant for this kind of application. Finally, the red parts have a similar composition (elementary and mineralogical) to the one of standard red slip.
C1 [Leon, Y.; Sciau, P.] CEMES, CNRS, F-31055 Toulouse, France.
[Leon, Y.; Sciau, P.] Univ Toulouse, UPS, INSA, CEMES, F-31055 Toulouse, France.
[Goudeau, P.] Univ Poitiers, CNRS, SP2MI, F-86962 Chasseneuil, France.
[Tamura, N.] LBNL, ALS, Berkeley, CA 94720 USA.
[Webb, S.; Mehta, A.] Stanford Univ, SLAC, SSRL, Menlo Pk, CA 94025 USA.
RP Sciau, P (reprint author), CEMES, CNRS, BP 94347,29 Rue Jeanne Marvig, F-31055 Toulouse, France.
EM Yoanna.Leon@cemes.fr; Philippe.Sciau@cemes.fr;
pgoudeau@univ-poitiers.fr; ntamura@lbl.gov; mehta@slac.stanford.edu
RI Webb, Samuel/D-4778-2009; Sciau, Philippe/C-7734-2011
OI Webb, Samuel/0000-0003-1188-0464;
FU Conseil Regional de Midi-Pyrenees [06001527]; France-Stanford Center;
Office of Science, Office of Basic Energy Sciences, of the U.S.
Department of Energy [DE-AC02-05CH11231, DE-AC02-76-SFO0515]; NSF
through the Iowa State University [0416243]
FX The authors thank A. Vernhet and M. Kunz for artefact specimens and for
assistance during experiments at ALS beam line 12.3.2, respectively. The
authors would like to thank also Shopie Gouy from LMTG (Toulouse
University) for microprobe measurements. This work was supported by the
Conseil Regional de Midi-Pyrenees under contract No. 06001527, a
France-Stanford Center grant for the 2006-2007 academic years and the
Director, Office of Science, Office of Basic Energy Sciences, of the
U.S. Department of Energy who is operating ALS and SSRL under Contracts
No. DE-AC02-05CH11231 and DE-AC02-76-SFO0515, respectively. The upgrade
of the ALS beam line 12.3.2 was enabled through the NSF grant # 0416243
obtained through the Iowa State University.
NR 17
TC 10
Z9 10
U1 2
U2 16
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0947-8396
J9 APPL PHYS A-MATER
JI Appl. Phys. A-Mater. Sci. Process.
PD MAY
PY 2010
VL 99
IS 2
SI SI
BP 419
EP 425
DI 10.1007/s00339-010-5628-x
PG 7
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 597TJ
UT WOS:000277784300011
ER
PT J
AU Ji, CX
Huang, ML
Kramer, MJ
Zhang, C
Wu, KS
Yang, Y
Chang, YA
AF Ji, C. -X.
Huang, M. L.
Kramer, M. J.
Zhang, C.
Wu, K. S.
Yang, Y.
Chang, Y. A.
TI Composition dependent phase transformation of Pt0.5-x Mn0.5+x from A1 to
L1(0) phase
SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
LA English
DT Article
ID BLOCKING TEMPERATURE DISTRIBUTION; SPIN-VALVE STRUCTURES; THIN-FILMS;
GIANT MAGNETORESISTANCE; ROOM-TEMPERATURE; MN; ANTIFERROMAGNETS;
STABILITY; SENSORS; SYSTEM
AB Pt0.5-x Mn0.5+x films were prepared by sputtering deposition of Pt foil and Mn target to study the order-disorder transition from a thermodynamic metastable fcc (A1) phase to L1(0) phase. Both Differential Scanning Calorimetry and High Temperature X-Ray Diffraction studies showed the phase transformation from fcc to the L1(0) structure for the Pt0.50Mn0.50 and Pt0.40Mn0.60 samples but along completely different kinetic paths. A composition dependent phase transformation was observed by comprehensive Differential Scanning Calorimetry studies on a series of Pt0.5-x Mn0.5+x samples. The changes of the lattice parameter and the cell volume of L1(0) Pt0.5-x Mn0.5+x as a function of composition suggest that the anti-site is not the dominant point defect for L1(0) Pt0.5-x Mn0.5+x .
C1 [Ji, C. -X.] MKS Instruments Inc, Wilmington, MA 01887 USA.
[Huang, M. L.; Kramer, M. J.] Iowa State Univ, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA.
[Zhang, C.; Wu, K. S.; Yang, Y.; Chang, Y. A.] Univ Wisconsin, Mat Sci Program, Madison, WI 53706 USA.
RP Ji, CX (reprint author), MKS Instruments Inc, 90 Ind Way, Wilmington, MA 01887 USA.
EM chengxiang.ji@gmail.com
RI Yang, Ying/E-5542-2017
OI Yang, Ying/0000-0001-6480-2254
FU National Science Foundation [NSF-DMR-0097621]; Division of Materials
Science, Office of Basic Energy Research of DOE [DE-FG02-99ER45777];
Wisconsin Distinguished Professorship
FX The authors would like to thank the financial support from National
Science Foundation through grant no. NSF-DMR-0097621, Division of
Materials Science, Office of Basic Energy Research of DOE through grant
no. DE-FG02-99ER45777 and the Wisconsin Distinguished Professorship.
NR 29
TC 0
Z9 0
U1 1
U2 5
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0947-8396
J9 APPL PHYS A-MATER
JI Appl. Phys. A-Mater. Sci. Process.
PD MAY
PY 2010
VL 99
IS 2
SI SI
BP 471
EP 475
DI 10.1007/s00339-010-5557-8
PG 5
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 597TJ
UT WOS:000277784300019
ER
PT J
AU Santos, CC
Guedes, I
Siqueira, JP
Misoguti, L
Zilio, SC
Boatner, LA
AF Santos, C. C.
Guedes, I.
Siqueira, J. P.
Misoguti, L.
Zilio, S. C.
Boatner, L. A.
TI Third-order nonlinearity of Er3+-doped lead phosphate glass
SO APPLIED PHYSICS B-LASERS AND OPTICS
LA English
DT Article
ID REFRACTIVE-INDEX; SILICATE GLASS; FIBERS; GENERATION; ABSORPTION; LASER
AB The third-order optical susceptibility and dispersion of the linear refractive index of Er3+-doped lead phosphate glass were measured in the wavelength range between 400 and 1940 nm by using the spectrally resolved femtosecond Maker fringes technique. The nonlinear refractive index obtained from the third-order susceptibility was found to be five times higher than that of silica, indicating that Er3+-doped lead phosphate glass is a potential candidate to be used as the base component for the fabrication of photonic devices. For comparison purposes, the Z-scan technique was also employed to obtain the values of the nonlinear refractive index of Er3+-doped lead phosphate glass at several wavelengths, and the values obtained using the two techniques agree to within 15%.
C1 [Santos, C. C.; Guedes, I.] Univ Fed Ceara, Dept Fis, BR-60455760 Fortaleza, Ceara, Brazil.
[Siqueira, J. P.; Misoguti, L.; Zilio, S. C.] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil.
[Boatner, L. A.] Oak Ridge Natl Lab, Ctr Radiat Detect Mat & Syst, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Guedes, I (reprint author), Univ Fed Ceara, Dept Fis, Campus PICI,Caixa Postal 6030, BR-60455760 Fortaleza, Ceara, Brazil.
EM guedes@fisica.ufc.br
RI zilio, sergio/B-4663-2011; Misoguti, Lino/C-2462-2012; Group,
Photonics/D-3910-2012; Santos, Clenilton/I-2540-2012; GUEDES,
ILDE/C-3451-2013; Nanobiosimes, Inct/K-2263-2013; SIQUEIRA,
JONATHAS/C-6233-2015; Boatner, Lynn/I-6428-2013; Sao Carlos Institute of
Physics, IFSC/USP/M-2664-2016; UFC, DF/E-1564-2017; Universidade Federal
do Ceara, Physics Department/J-4630-2016;
OI Misoguti, Lino/0000-0001-6624-8453; SIQUEIRA,
JONATHAS/0000-0002-5246-1429; Boatner, Lynn/0000-0002-0235-7594;
Universidade Federal do Ceara, Physics Department/0000-0002-9247-6780;
GUEDES, ILDE/0000-0002-1040-5891
FU FUNCAP; CAPES; PRONEX; FAPESP; CNPq; FINEP Brazilian; Division of
Materials Sciences and Engineering, Office of Basic Energy Sciences,
U.S. Department of Energy [DE-AC05-00OR2725]
FX The financial support for this research by the FUNCAP, CAPES, PRONEX,
FAPESP, CNPq and FINEP Brazilian agencies is gratefully acknowledged.
The research was sponsored in part by the Division of Materials Sciences
and Engineering, Office of Basic Energy Sciences, U.S. Department of
Energy, under Contract No. DE-AC05-00OR2725 with Oak Ridge National
Laboratory managed and operated by UT-Battelle, LLC.
NR 25
TC 9
Z9 9
U1 0
U2 4
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0946-2171
J9 APPL PHYS B-LASERS O
JI Appl. Phys. B-Lasers Opt.
PD MAY
PY 2010
VL 99
IS 3
BP 559
EP 563
DI 10.1007/s00340-010-3922-0
PG 5
WC Optics; Physics, Applied
SC Optics; Physics
GA 595PZ
UT WOS:000277625900027
ER
PT J
AU Scaffidi, JP
Gregas, MK
Lauly, B
Carter, JC
Angel, SM
Vo-Dinh, T
AF Scaffidi, Jonathan P.
Gregas, Molly K.
Lauly, Benoit
Carter, J. Chance
Angel, S. Michael
Vo-Dinh, Tuan
TI Trace Molecular Detection via Surface-Enhanced Raman Scattering and
Surface-Enhanced Resonance Raman Scattering at a Distance of 15 Meters
SO APPLIED SPECTROSCOPY
LA English
DT Article
DE Raman spectroscopy; Surface-enhanced Raman spectroscopy; SERS;
Surface-enhanced resonance Raman spectroscopy; SERRS; Remote detection;
Stand-off detection
ID INDUCED BREAKDOWN SPECTROSCOPY; STAND-OFF; IN-SITU; FLUORESCENCE;
EXPLOSIVES; DEPENDENCE; EMISSION; PULSE; LIDAR; TEMPERATURE
AB We report the first demonstration of surface-enhanced Raman spectroscopy (SERS) detection of para-mercapto benzoic acid (pMBA) and surface-enhanced resonance Raman spectroscopy (SERRS) detection of brilliant cresyl blue (BCB) and cresyl violet perchlorate (CVP) with continuous-wave excitation from a stand-off distance of 15 meters. We further report the first stand-off SERRS detection of BCB and CVP at that same distance in the presence of ambient fluorescent and incandescent/blackbody background light. These preliminary results suggest that it is possible to detect sub-nanomole amounts of material at reasonable distances with eye-safe laser powers using stand-off SERRS and serve as proof-of-concept highlighting the potential extension of stand-off Raman spectroscopy to include SERS and SERRS for remote, eye-safe chemical detection, analysis, and imaging in the presence of ambient background light.
C1 [Scaffidi, Jonathan P.; Gregas, Molly K.; Lauly, Benoit; Vo-Dinh, Tuan] Duke Univ, Fitzpatrick Inst Photon, Dept Biomed Engn, Durham, NC 27708 USA.
[Carter, J. Chance] Lawrence Livermore Natl Lab, M Div Forens Sci Ctr, Livermore, CA 94550 USA.
[Angel, S. Michael] Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA.
RP Vo-Dinh, T (reprint author), Duke Univ, Fitzpatrick Inst Photon, Dept Biomed Engn, 136 Hudson Hall,Box 90281, Durham, NC 27708 USA.
EM tuan.vodinh@duke.edu
NR 38
TC 12
Z9 13
U1 1
U2 20
PU SOC APPLIED SPECTROSCOPY
PI FREDERICK
PA 5320 SPECTRUM DRIVE SUITE C, FREDERICK, MD 21703 USA
SN 0003-7028
J9 APPL SPECTROSC
JI Appl. Spectrosc.
PD MAY
PY 2010
VL 64
IS 5
BP 485
EP 492
PG 8
WC Instruments & Instrumentation; Spectroscopy
SC Instruments & Instrumentation; Spectroscopy
GA 598OD
UT WOS:000277846600004
PM 20482966
ER
PT J
AU Dieckmann, J
McKenney, K
Brodrick, J
AF Dieckmann, John
McKenney, Kurtis
Brodrick, James
TI Variable Frequency Drives, Part 2: VFDs for Blowers
SO ASHRAE JOURNAL
LA English
DT Editorial Material
C1 [Dieckmann, John; McKenney, Kurtis] TIAX LLC, Mech Syst Grp, Cambridge, MA USA.
[Brodrick, James] US DOE, Bldg Technol Program, Washington, DC USA.
RP Dieckmann, J (reprint author), TIAX LLC, Mech Syst Grp, Cambridge, MA USA.
NR 3
TC 0
Z9 0
U1 0
U2 2
PU AMER SOC HEATING REFRIGERATING AIR-CONDITIONING ENG, INC,
PI ATLANTA
PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 USA
SN 0001-2491
J9 ASHRAE J
JI ASHRAE J.
PD MAY
PY 2010
VL 52
IS 5
BP 58
EP +
PG 3
WC Thermodynamics; Construction & Building Technology; Engineering,
Mechanical
SC Thermodynamics; Construction & Building Technology; Engineering
GA 593EY
UT WOS:000277436600014
ER
PT J
AU Shkrob, IA
Chemerisov, SD
Marin, TW
AF Shkrob, Ilya A.
Chemerisov, Sergey D.
Marin, Timothy W.
TI Photocatalytic Decomposition of Carboxylated Molecules on Light-Exposed
Martian Regolith and Its Relation to Methane Production on Mars
SO ASTROBIOLOGY
LA English
DT Article
DE Mars; Methane; Biopolymers; Catalysis; UV radiation
ID AMINO-ACIDS; GUSEV CRATER; MOSSBAUER SPECTROMETER; OXIDANT ENHANCEMENT;
HYDROGEN-PEROXIDE; ORGANIC-COMPOUNDS; MERIDIANI-PLANUM; SPIRIT ROVER;
ACETIC-ACID; DUST DEVILS
AB We propose that the paucity of organic compounds in martian soil can be accounted for by efficient photocatalytic decomposition of carboxylated molecules due to the occurrence of the photo-Kolbe reaction at the surface of particulate iron(III) oxides that are abundant in the martian regolith. This photoreaction is initiated by the absorption of UVA light, and it readily occurs even at low temperature. The decarboxylation is observed for miscellaneous organic carboxylates, including the nonvolatile products of kerogen oxidation (that are currently thought to accumulate in the soil) as well as alpha-amino acids and peptides. Our study indicates that there may be no "safe haven'' for these organic compounds on Mars; oxidation by reactive radicals, such as hydroxyl, is concerted with photocatalytic reactions on the oxide particles. Acting together, these two mechanisms result in mineralization of the organic component. The photooxidation of acetate (the terminal product of radical oxidation of the aliphatic component of kerogen) on the iron(III) oxides results in the formation of methane; this reaction may account for seasonably variable production of methane on Mars. The concomitant reduction of Fe(III) in the regolith leads to the formation of highly soluble ferrous ions that contribute to weathering of the soil particles.
C1 [Shkrob, Ilya A.; Chemerisov, Sergey D.; Marin, Timothy W.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
[Marin, Timothy W.] Benedictine Univ, Dept Chem, Lisle, IL USA.
RP Shkrob, IA (reprint author), Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM shkrob@anl.gov
FU Office of Science, Division of Chemical Science, US-DOE
[DE-AC02-06CH11357]; NASA [NNH08AI65I]
FX Work performed under the auspices of the Office of Science, Division of
Chemical Science, US-DOE under contract No. DE-AC02-06CH11357 and NASA's
Mars Fundamental Research Program grant No. NNH08AI65I. I.A.S. thanks T.
Rajh and N. Dimitrijevic for introduction to the oxide photocatalysis
and M. Zolotov, G. Delory, M. Moore, and A. Schuerger for their insights
in martian chemistry and geochemistry. We also thank the anonymous
reviewers for critical reading of this paper.
NR 69
TC 28
Z9 28
U1 1
U2 22
PU MARY ANN LIEBERT, INC
PI NEW ROCHELLE
PA 140 HUGUENOT STREET, 3RD FL, NEW ROCHELLE, NY 10801 USA
SN 1531-1074
EI 1557-8070
J9 ASTROBIOLOGY
JI Astrobiology
PD MAY
PY 2010
VL 10
IS 4
BP 425
EP 436
DI 10.1089/ast.2009.0433
PG 12
WC Astronomy & Astrophysics; Biology; Geosciences, Multidisciplinary
SC Astronomy & Astrophysics; Life Sciences & Biomedicine - Other Topics;
Geology
GA 607YX
UT WOS:000278544300006
PM 20528197
ER
PT J
AU Mondal, S
Lin, CC
Chen, WP
Zhang, ZW
Alcock, C
Axelrod, T
Bianco, FB
Byun, YI
Coehlo, NK
Cook, KH
Dave, R
Kim, DW
King, SK
Lee, T
Lehner, MJ
Lin, HC
Marshall, SL
Protopapas, P
Rice, JA
Schwamb, ME
Wang, JH
Wang, SY
Wen, CY
AF Mondal, S.
Lin, C. C.
Chen, W. P.
Zhang, Z. -W.
Alcock, C.
Axelrod, T.
Bianco, F. B.
Byun, Y. -I.
Coehlo, N. K.
Cook, K. H.
Dave, R.
Kim, D. -W.
King, S. -K.
Lee, T.
Lehner, M. J.
Lin, H. -C.
Marshall, S. L.
Protopapas, P.
Rice, J. A.
Schwamb, M. E.
Wang, J. -H.
Wang, S. -Y.
Wen, C. -Y.
TI THE TAIWANESE-AMERICAN OCCULTATION SURVEY PROJECT STELLAR VARIABILITY.
II. DETECTION OF 15 VARIABLE STARS
SO ASTRONOMICAL JOURNAL
LA English
DT Article
DE methods: data analysis; stars: imaging; stars: variables: Cepheids;
stars: variables: delta Scuti; stars: variables: general; stars:
variables: RR Lyrae; surveys
ID LARGE-MAGELLANIC-CLOUD; KUIPER-BELT OBJECTS; SPACED DATA; CEPHEIDS;
TAOS; INVENTORY; OVERTONE; CATALOG; BULGE; BAR
AB The Taiwanese-American Occultation Survey (TAOS) project has collected more than a billion photometric measurements since 2005 January. These sky survey data-covering timescales from a fraction of a second to a few hundred days-are a useful source to study stellar variability. A total of 167 star fields, mostly along the ecliptic plane, have been selected for photometric monitoring with the TAOS telescopes. This paper presents our initial analysis of a search for periodic variable stars from the time-series TAOS data on one particular TAOS field, No. 151 (R. A. = 17(h)30(m)6(s).7, decl. = 27 degrees 17'30 '', J2000), which had been observed over 47 epochs in 2005. A total of 81 candidate variables are identified in the 3 deg(2) field, with magnitudes in the range 8 < R < 16. On the basis of the periodicity and shape of the light curves, 29 variables, 15 of which were previously unknown, are classified as RR Lyrae, Cepheid, delta Scuti, SX Phonencis, semi-regular, and eclipsing binaries.
C1 [Mondal, S.; Lin, C. C.; Chen, W. P.; Zhang, Z. -W.; Lin, H. -C.; Wang, J. -H.] Natl Cent Univ, Inst Astron, Jhongli 32054, Taiwan.
[Mondal, S.] Aryabhatta Res Inst Observat Sci, Naini Tal 263129, India.
[Alcock, C.; Bianco, F. B.; Lehner, M. J.; Protopapas, P.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Axelrod, T.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
[Bianco, F. B.; Lehner, M. J.] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA.
[Bianco, F. B.] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA.
[Bianco, F. B.] Global Telescope Network Inc, Las Cumbres Observ, Santa Barbara, CA 93117 USA.
[Byun, Y. -I.; Kim, D. -W.] Yonsei Univ, Dept Astron, Seoul 120749, South Korea.
[Coehlo, N. K.; Rice, J. A.] Univ Calif Berkeley, Dept Stat, Berkeley, CA 94720 USA.
[Cook, K. H.; Marshall, S. L.] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA.
[Dave, R.; Protopapas, P.] Harvard, Initiat Innovat Comp, Cambridge, MA 02138 USA.
[King, S. -K.; Lee, T.; Lehner, M. J.; Wang, J. -H.; Wang, S. -Y.; Wen, C. -Y.] Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan.
[Marshall, S. L.] Kavli Inst Particle Astrophys & Cosmol, Menlo Pk, CA 94025 USA.
[Schwamb, M. E.] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA.
RP Mondal, S (reprint author), Natl Cent Univ, Inst Astron, 300 Jhongda Rd, Jhongli 32054, Taiwan.
EM soumen@aries.res.in
RI Lee, Typhoon/N-8347-2013;
OI Lehner, Matthew/0000-0003-4077-0985; Schwamb, Megan/0000-0003-4365-1455
FU NSC [96-2112-M-008-024-MY3]; National Research Foundation of Korea
[2009-0075376]; thematic research program [AS-88-TP-A02]; National
Science Foundation [AST-0501681]; NASA [NNG04G113G]; U.S. Department of
Energy by Lawrence Livermore National Laboratory [W-7405-Eng-48,
DE-AC52-07NA27344]; Stanford Linear Accelerator Center
[DE-AC02-76SF00515]
FX The work at National Central University was supported by the grant NSC
96-2112-M-008-024-MY3. Y.I.B. acknowledges the support of the National
Research Foundation of Korea through grant 2009-0075376. Work at
Academia Sinica was supported in part by the thematic research program
AS-88-TP-A02. Work at the Harvard College Observatory was supported in
part by the National Science Foundation under grant AST-0501681 and by
NASA under grant NNG04G113G. S.L.M.'s work was performed under the
auspices of the U.S. Department of Energy by Lawrence Livermore National
Laboratory in part under Contract W-7405-Eng-48 and by Stanford Linear
Accelerator Center under Contract DE-AC02-76SF00515. K.H.C.'s work was
performed under the auspices of the U.S. Department of Energy by
Lawrence Livermore National Laboratory in part under Contract
W-7405-Eng-48 and in part under Contract DE-AC52-07NA27344.
NR 33
TC 2
Z9 2
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-6256
J9 ASTRON J
JI Astron. J.
PD MAY
PY 2010
VL 139
IS 5
BP 2026
EP 2033
DI 10.1088/0004-6256/139/5/2026
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 581HV
UT WOS:000276513700024
ER
PT J
AU Kim, A
Bonissent, A
Christiansen, JL
Ealet, A
Faccioli, L
Gladney, L
Kushner, G
Linder, E
Stoughton, C
Wang, L
AF Kim, A.
Bonissent, A.
Christiansen, J. L.
Ealet, A.
Faccioli, L.
Gladney, L.
Kushner, G.
Linder, E.
Stoughton, C.
Wang, L.
TI Prospective Type Ia supernova surveys from Dome A
SO ASTROPARTICLE PHYSICS
LA English
DT Article
DE Supernova: Type Ia, Dome A; Surveys; Cosmology
ID II-P SUPERNOVAE; TELESCOPE; EMISSION; SITE
AB Dome A, the highest plateau in Antarctica, is being developed as a site for an astronomical observatory. The planned telescopes and instrumentation and the unique site characteristics are conducive toward Type la supernova surveys for cosmology. A self-contained search and survey over 5 years can yield a spectro-photometric time series of similar to 1000z < 0.08 supernovae. These can serve to anchor the Hubble diagram and quantify the relationship between luminosities and heterogeneities within the Type la supernova class, reducing systematics. Larger aperture (greater than or similar to 4-m) telescopes are capable of discovering supernovae shortly after explosion out to z similar to 3. These can be fed to space telescopes, and can isolate systematics and extend the redshift range over which we measure the expansion history of the universe. Published by Elsevier B.V.
C1 [Kim, A.; Kushner, G.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Bonissent, A.; Ealet, A.] Ctr Phys Particules Marseille, Marseille, France.
[Christiansen, J. L.] Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA 93407 USA.
[Faccioli, L.; Linder, E.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Stoughton, C.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Gladney, L.] Univ Penn, Philadelphia, PA 19104 USA.
[Wang, L.] Texas A&M Univ, College Stn, TX 77843 USA.
[Wang, L.] Chinese Ctr Antarctic Astron, Nanjing, Peoples R China.
RP Kim, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM agkim@lbl.gov
FU U.S. Department of Energy [AC02-05CH11231, DE-AC02-07CH11359]; NSF [AST
0708873]
FX This work was supported by the Director. Office of Science, Office of
High Energy Physics, of the U.S. Department of Energy under Contract
Nos. DE-AC02-05CH11231 and DE-AC02-07CH11359. L.W. is supported
partially by an NSF Grant AST 0708873.
NR 28
TC 3
Z9 4
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0927-6505
J9 ASTROPART PHYS
JI Astropart Phys.
PD MAY
PY 2010
VL 33
IS 4
BP 248
EP 254
DI 10.1016/j.astropartphys.2010.02.004
PG 7
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 599YH
UT WOS:000277949700005
ER
PT J
AU Acciari, VA
Aliu, E
Arlen, T
Aune, T
Bautista, M
Beilicke, M
Benbow, W
Boltuch, D
Bradbury, SM
Buckley, JH
Bugaev, V
Butt, Y
Byrum, K
Cannon, A
Cesarini, A
Chow, YC
Ciupik, L
Cogan, P
Cui, W
Dickherber, R
Duke, C
Ergin, T
Fegan, SJ
Finley, JP
Finnegan, G
Fortin, P
Fortson, L
Furniss, A
Galante, N
Gall, D
Gillanders, GH
Grube, J
Guenette, R
Gyuk, G
Hanna, D
Holder, J
Huang, D
Hui, CM
Humensky, TB
Kaaret, P
Karlsson, N
Kertzman, M
Kieda, D
Konopelko, A
Krawczynski, H
Krennrich, F
Lang, MJ
LeBohec, S
Maier, G
McArthur, S
McCann, A
McCutcheon, M
Millis, J
Moriarty, P
Ong, RA
Pandel, D
Perkins, JS
Pohl, M
Quinn, J
Ragan, K
Reynolds, PT
Roache, E
Rose, HJ
Schroedter, M
Sembroski, GH
Smith, AW
Smith, BR
Steele, D
Swordy, SP
Theiling, M
Thibadeau, S
Varlotta, A
Vassiliev, VV
Vincent, S
Wagner, RG
Wakely, SP
Ward, JE
Weekes, TC
Weinstein, A
Weisgarber, T
Wissel, S
Wood, M
AF Acciari, V. A.
Aliu, E.
Arlen, T.
Aune, T.
Bautista, M.
Beilicke, M.
Benbow, W.
Boltuch, D.
Bradbury, S. M.
Buckley, J. H.
Bugaev, V.
Butt, Y.
Byrum, K.
Cannon, A.
Cesarini, A.
Chow, Y. C.
Ciupik, L.
Cogan, P.
Cui, W.
Dickherber, R.
Duke, C.
Ergin, T.
Fegan, S. J.
Finley, J. P.
Finnegan, G.
Fortin, P.
Fortson, L.
Furniss, A.
Galante, N.
Gall, D.
Gillanders, G. H.
Grube, J.
Guenette, R.
Gyuk, G.
Hanna, D.
Holder, J.
Huang, D.
Hui, C. M.
Humensky, T. B.
Kaaret, P.
Karlsson, N.
Kertzman, M.
Kieda, D.
Konopelko, A.
Krawczynski, H.
Krennrich, F.
Lang, M. J.
LeBohec, S.
Maier, G.
McArthur, S.
McCann, A.
McCutcheon, M.
Millis, J.
Moriarty, P.
Ong, R. A.
Pandel, D.
Perkins, J. S.
Pohl, M.
Quinn, J.
Ragan, K.
Reynolds, P. T.
Roache, E.
Rose, H. J.
Schroedter, M.
Sembroski, G. H.
Smith, A. W.
Smith, B. R.
Steele, D.
Swordy, S. P.
Theiling, M.
Thibadeau, S.
Varlotta, A.
Vassiliev, V. V.
Vincent, S.
Wagner, R. G.
Wakely, S. P.
Ward, J. E.
Weekes, T. C.
Weinstein, A.
Weisgarber, T.
Wissel, S.
Wood, M.
TI OBSERVATIONS OF THE SHELL-TYPE SUPERNOVA REMNANT CASSIOPEIA A AT TeV
ENERGIES WITH VERITAS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE acceleration of particles; cosmic rays; gamma rays: ISM; ISM: individual
objects (Cassiopeia A); ISM: supernova remnants
ID AIR CERENKOV TELESCOPES; GAMMA-RAY EMISSION; CRAB-NEBULA; A SUPERNOVA;
MAGNETIC-FIELDS; PARTICLE-ACCELERATION; ELECTRON ACCELERATION; RX
J1713.7-3946; MAGIC TELESCOPE; COSMIC-RAYS
AB We report on observations of very high energy gamma rays from the shell-type supernova remnant (SNR) Cassiopeia A with the Very Energetic Radiation Imaging Telescope Array System stereoscopic array of four imaging atmospheric Cherenkov telescopes in Arizona. The total exposure time for these observations is 22 hr, accumulated between September and November of 2007. The gamma-ray source associated with the SNR Cassiopeia A was detected above 200 GeV with a statistical significance of 8.3 sigma. The estimated integral flux for this gamma-ray source is about 3% of the Crab-Nebula flux. The photon spectrum is compatible with a power law dN/dE proportional to E(-Gamma) with an index Gamma = 2.61 +/- 0.24(stat) +/- 0.2(sys). The data are consistent with a point-like source. We provide a detailed description of the analysis results and discuss physical mechanisms that may be responsible for the observed gamma-ray emission.
C1 [Huang, D.; Konopelko, A.; Smith, B. R.] Pittsburg State Univ, Dept Phys, Pittsburg, KS 66762 USA.
[Acciari, V. A.; Benbow, W.; Galante, N.; Perkins, J. S.; Roache, E.; Theiling, M.; Weekes, T. C.] Harvard Smithsonian Ctr Astrophys, Fred Lawrence Whipple Observ, Amado, AZ 85645 USA.
[Aliu, E.; Boltuch, D.; Holder, J.] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA.
[Aliu, E.; Boltuch, D.; Holder, J.] Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA.
[Arlen, T.; Chow, Y. C.; Fegan, S. J.; Ong, R. A.; Vassiliev, V. V.; Weinstein, A.; Wood, M.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
[Aune, T.; Furniss, A.] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA.
[Aune, T.; Furniss, A.] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA.
[Bautista, M.; Cogan, P.; Guenette, R.; Hanna, D.; Maier, G.; McCann, A.; McCutcheon, M.; Ragan, K.] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
[Beilicke, M.; Buckley, J. H.; Bugaev, V.; Dickherber, R.; Krawczynski, H.; McArthur, S.; Thibadeau, S.] Washington Univ, Dept Phys, St Louis, MO 63130 USA.
[Bradbury, S. M.; Rose, H. J.] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England.
[Butt, Y.; Ergin, T.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Byrum, K.; Smith, A. W.; Wagner, R. G.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Cannon, A.; Grube, J.; Quinn, J.; Ward, J. E.] Univ Coll Dublin, Sch Phys, Dublin 4, Ireland.
[Cesarini, A.; Gillanders, G. H.; Lang, M. J.] Natl Univ Ireland, Sch Phys, Galway, Ireland.
[Ciupik, L.; Fortson, L.; Gyuk, G.; Karlsson, N.; Steele, D.] Adler Planetarium & Astron Museum, Dept Astron, Chicago, IL 60605 USA.
[Cui, W.; Finley, J. P.; Gall, D.; Millis, J.; Sembroski, G. H.; Varlotta, A.] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA.
[Duke, C.] Grinnell Coll, Dept Phys, Grinnell, IA 50112 USA.
[Finnegan, G.; Hui, C. M.; Kieda, D.; LeBohec, S.; Vincent, S.] Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA.
[Fortin, P.] Columbia Univ Barnard Coll, Dept Phys & Astron, New York, NY 10027 USA.
[Humensky, T. B.; Swordy, S. P.; Wakely, S. P.; Weisgarber, T.; Wissel, S.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
[Kaaret, P.; Pandel, D.] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA.
[Kertzman, M.] DePauw Univ, Dept Phys & Astron, Greencastle, IN 46135 USA.
[Krennrich, F.; Pohl, M.; Schroedter, M.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Moriarty, P.] Galway Mayo Inst Technol, Dept Life & Phys Sci, Galway, Ireland.
[Reynolds, P. T.] Cork Inst Technol, Dept Appl Phys & Instrumentat, Cork, Ireland.
RP Konopelko, A (reprint author), Pittsburg State Univ, Dept Phys, 1701 South Broadway, Pittsburg, KS 66762 USA.
EM akonopel@pittstate.edu
OI Cui, Wei/0000-0002-6324-5772; Cesarini, Andrea/0000-0002-8611-8610;
Ward, John E/0000-0003-1973-0794; Pandel, Dirk/0000-0003-2085-5586;
Lang, Mark/0000-0003-4641-4201
FU U.S. Department of Energy; U.S. National Science Foundation; Smithsonian
Institution; NSERC in Canada; Science Foundation Ireland; STFC in the
UK; NASA [NNX08AV62G]
FX This research was supported by grants from the U.S. Department of
Energy, the U.S. National Science Foundation, and the Smithsonian
Institution, by NSERC in Canada, by Science Foundation Ireland, and by
STFC in the UK. The VERITAS collaboration acknowledges the NASA support
on the Fermi GST LAT grant No. NNX08AV62G.
NR 61
TC 48
Z9 49
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD MAY 1
PY 2010
VL 714
IS 1
BP 163
EP 169
DI 10.1088/0004-637X/714/1/163
PG 7
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 583SV
UT WOS:000276701000014
ER
PT J
AU Gnedin, NY
Kravtsov, AV
AF Gnedin, Nickolay Y.
Kravtsov, Andrey V.
TI ON THE KENNICUTT-SCHMIDT RELATION OF LOW-METALLICITY HIGH-REDSHIFT
GALAXIES
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE cosmology: theory; galaxies: evolution; galaxies: formation; methods:
numerical; stars: formation
ID STAR-FORMATION LAW; DAMPED LY-ALPHA; LYMAN-BREAK GALAXIES; COLD
DARK-MATTER; TO-MOLECULAR TRANSITION; LARGE-SCALE STRUCTURE; FAINT DWARF
GALAXIES; ULTRA DEEP FIELD; GAMMA-RAY BURST; GALACTIC DISKS
AB We present results of self-consistent, high-resolution cosmological simulations of galaxy formation at z similar to 3. The simulations employ a recently developed recipe for star formation based on the local abundance of molecular hydrogen, which is tracked self-consistently during the course of simulation. The phenomenological H(2) formation model accounts for the effects of dissociating UV radiation of stars in each galaxy, as well as self-shielding and shielding of H(2) by dust, and therefore allows us to explore effects of lower metallicities and higher UV fluxes prevalent in high-redshift galaxies on their star formation. We compare stellar masses, metallicities, and star formation rates of the simulated galaxies to available observations of the Lyman break galaxies (LBGs) and find a reasonable agreement. We find that the Kennicutt-Schmidt (KS) relation exhibited by our simulated galaxies at z approximate to 3 is substantially steeper and has a lower amplitude than the z = 0 relation at Sigma(H) less than or similar to 100 M(circle dot) pc(-2). The predicted relation, however, is consistent with existing observational constraints for the z approximate to 3 damped Ly alpha and LBGs. Our tests show that the main reason for the difference from the local KS relation is lower metallicity of the interstellar medium in high-redshift galaxies. We discuss several implications of the metallicity-dependence of the KS relation for galaxy evolution and interpretation of observations. In particular, we show that the observed size of high-redshift exponential disks depends sensitively on their KS relation. Our results also suggest that significantly reduced star formation efficiency at low gas surface densities can lead to strong suppression of star formation in low-mass high-redshift galaxies and long gas consumption time scales over most of the disks in large galaxies. The longer gas consumption time scales could make disks more resilient to major and minor mergers and could help explain the prevalence of the thin stellar disks in the local universe.
C1 [Gnedin, Nickolay Y.] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
[Gnedin, Nickolay Y.; Kravtsov, Andrey V.] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[Gnedin, Nickolay Y.; Kravtsov, Andrey V.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
[Gnedin, Nickolay Y.; Kravtsov, Andrey V.] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
RP Gnedin, NY (reprint author), Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, POB 500, Batavia, IL 60510 USA.
EM gnedin@fnal.gov; andrey@oddjob.uchicago.edu
FU DOE; NSF [AST-0507596, AST-0708154]; Kavli Institute for Cosmological
Physics at the University of Chicago through the NSF [PHY-0551142];
Kavli Foundation; Fermilab; Kavli Institute for Cosmological Physics;
University of Chicago
FX We thank Hsiao-Wen Chen, Marc Rafelski, and Art Wolfe for important
comments and corrections on the earlier versions of this paper. We are
also indebted to Marc and Art for the permission to show their yet
unpublished measurements in our Figure 3 and for their help in
translating Wolfe & Chen (2006) limits into points shown in Figure 3. We
thank Charlie Conroy for making his FSPS code available and assistance
with the SPS calculations. This paper was significantly improved by the
comments from the referee Fabio Governato. A. K. thank organizers of the
"SFR@50" conference in 2009 July and owners of the Abbazia di Spineto
for the great meeting and wonderful atmosphere for scientific exchange,
from which this paper has benefited greatly. This work was supported in
part by the DOE at Fermilab, by NSF grants AST-0507596 and AST-0708154,
and by the Kavli Institute for Cosmological Physics at the University of
Chicago through the NSF grant PHY-0551142 and an endowment from the
Kavli Foundation. The simulations used in this work have been performed
on the Joint Fermilab-KICP Supercomputing Cluster, supported by grants
from Fermilab, Kavli Institute for Cosmological Physics, and the
University of Chicago. This work made extensive use of the NASA
Astrophysics Data System and arXiv.org preprint server.
NR 88
TC 85
Z9 85
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD MAY 1
PY 2010
VL 714
IS 1
BP 287
EP 295
DI 10.1088/0004-637X/714/1/287
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 583SV
UT WOS:000276701000023
ER
PT J
AU de Jong, JTA
Yanny, B
Rix, HW
Dolphin, AE
Martin, NF
Beers, TC
AF de Jong, Jelte T. A.
Yanny, Brian
Rix, Hans-Walter
Dolphin, Andrew E.
Martin, Nicolas F.
Beers, Timothy C.
TI MAPPING THE STELLAR STRUCTURE OF THE MILKY WAY THICK DISK AND HALO USING
SEGUE PHOTOMETRY
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Galaxy: disk; Galaxy: halo; Galaxy: structure; stars: statistics
ID DIGITAL SKY SURVEY; CANIS-MAJOR; DWARF GALAXY; STAR COUNTS; GALACTIC
STRUCTURE; ACCRETION ORIGIN; MONOCEROS RING; DATA RELEASE; STRIPE 82;
SDSS
AB We map the stellar structure of the Galactic thick disk and halo by applying color-magnitude diagram (CMD) fitting to photometric data from the Sloan Extension for Galactic Understanding and Exploration (SEGUE) survey. The SEGUE imaging scans allow, for the first time, a comprehensive analysis of Milky Way structure at both high and low latitudes using uniform Sloan Digital Sky Survey photometry. Incorporating photometry of all relevant stars simultaneously, CMD fitting bypasses the need to choose single tracer populations. Using old stellar populations of differing metallicities as templates, we obtain a sparse three-dimensional map of the stellar mass distribution at vertical bar Z vertical bar > 1 kpc. Fitting a smooth Milky Way model comprising exponential thin and thick disks and an axisymmetric power-law halo allows us to constrain the structural parameters of the thick disk and halo. The thick-disk scale height and length are well constrained at 0.75 +/- 0.07 kpc and 4.1 +/- 0.4 kpc, respectively. We find a stellar halo flattening within similar to 25 kpc of c/a = 0.88 +/- 0.03 and a power-law index of 2.75 +/- 0.07 (for 7 kpc less than or similar to R(GC) less than or similar to 30 kpc). The model fits yield thick-disk and stellar halo densities at the solar location of rho(thick,) (circle dot) = 10(-2.3+/-0.1) M(circle dot) pc(-3) and rho(halo, circle dot) = 10(-4.20+/-0.05) M(circle dot) pc(-3), averaging over any substructures. Our analysis provides the first clear in situ evidence for a radial metallicity gradient in the Milky Way's stellar halo: within R less than or similar to 15 kpc the stellar halo has a mean metallicity of [Fe/H] similar or equal to -1.6, which shifts to [Fe/H] similar or equal to -2.2 at larger radii, in line with the two-component halo deduced by Carollo et al. from a local kinematic analysis. Subtraction of the best-fit smooth and symmetric model from the overall density maps reveals a wealth of substructures at all latitudes, some attributable to known streams and overdensities, and some new. A simple warp cannot account for the low latitude substructure, as overdensities occur simultaneously above and below the Galactic plane.
C1 [de Jong, Jelte T. A.; Rix, Hans-Walter; Martin, Nicolas F.] Max Planck Inst Astron, D-69117 Heidelberg, Germany.
[Yanny, Brian] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Dolphin, Andrew E.] Raytheon Co, Tucson, AZ 85756 USA.
[Beers, Timothy C.] Michigan State Univ, JINA, E Lansing, MI 48824 USA.
[Beers, Timothy C.] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA.
RP de Jong, JTA (reprint author), Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany.
EM dejong@mpia.de
FU DFG [1177]; American Museum of Natural History; Astrophysical Institute
Potsdam; University of Basel; University of Cambridge; Case Western
Reserve University; University of Chicago; Drexel University; Fermilab;
Institute for Advanced Study; Japan Participation Group; Johns Hopkins
University; Joint Institute for Nuclear Astrophysics; Kavli Institute
for Particle Astrophysics and Cosmology; Korean Scientist Group; Chinese
Academy of Sciences (LAMOST); Los Alamos National Laboratory;
Max-Planck-Institute for Astronomy (MPIA); Max-Planck-Institute for
Astrophysics (MPA); New Mexico State University; Ohio State University;
University of Pittsburgh; University of Portsmouth; Princeton
University; United States Naval Observatory; University of Washington;
U.S. National Science Foundation [PHY 08-22648]; Alfred P. Sloan
Foundation; National Science Foundation; U.S. Department of Energy;
National Aeronautics and Space Administration; Japanese Monbukagakusho;
Max Planck Society; Higher Education Funding Council for England
FX The authors thank Eric Bell and Constance Rockosi for stimulating and
helpful conversations and Sergey Koposov for logistical help. We are
also grateful for helpful comments and feedback from. Zeljko Ivezic and
Mario Juric. J. T. A. d. J was supported by DFG Priority Program 1177.
T. C. B. acknowledges partial support for this work from grant PHY
08-22648: Physics Frontier Center/Joint Institute for Nuclear
Astrophysics (JINA), awarded by the U.S. National Science Foundation.;
Funding for the SDSS and SDSS-II has been provided by the Alfred P.
Sloan Foundation, the Participating Institutions, the National Science
Foundation, the U.S. Department of Energy, the National Aeronautics and
Space Administration, the Japanese Monbukagakusho, the Max Planck
Society, and the Higher Education Funding Council for England. The SDSS
Web site is http://www.sdss.org/.; The SDSS is managed by the
Astrophysical Research Consortium for the Participating Institutions.
The Participating Institutions are the American Museum of Natural
History, Astrophysical Institute Potsdam, University of Basel,
University of Cambridge, Case Western Reserve University, University of
Chicago, Drexel University, Fermilab, the Institute for Advanced Study,
the Japan Participation Group, Johns Hopkins University, the Joint
Institute for Nuclear Astrophysics, the Kavli Institute for Particle
Astrophysics and Cosmology, the Korean Scientist Group, the Chinese
Academy of Sciences (LAMOST), Los Alamos National Laboratory, the
Max-Planck-Institute for Astronomy (MPIA), the Max-Planck-Institute for
Astrophysics (MPA), New Mexico State University, Ohio State University,
University of Pittsburgh, University of Portsmouth, Princeton
University, the United States Naval Observatory, and the University of
Washington.
NR 59
TC 118
Z9 118
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD MAY 1
PY 2010
VL 714
IS 1
BP 663
EP 674
DI 10.1088/0004-637X/714/1/663
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 583SV
UT WOS:000276701000053
ER
PT J
AU Oesch, PA
Carollo, CM
Feldmann, R
Hahn, O
Lilly, SJ
Sargent, MT
Scarlata, C
Aller, MC
Aussel, H
Bolzonella, M
Bschorr, T
Bundy, K
Capak, P
Ilbert, O
Kneib, JP
Koekemoer, AM
Kovac, K
Leauthaud, A
Le Floc'h, E
Massey, R
McCracken, HJ
Pozzetti, L
Renzini, A
Rhodes, J
Salvato, M
Sanders, DB
Scoville, N
Sheth, K
Taniguchi, Y
Thompson, D
AF Oesch, P. A.
Carollo, C. M.
Feldmann, R.
Hahn, O.
Lilly, S. J.
Sargent, M. T.
Scarlata, C.
Aller, M. C.
Aussel, H.
Bolzonella, M.
Bschorr, T.
Bundy, K.
Capak, P.
Ilbert, O.
Kneib, J. -P.
Koekemoer, A. M.
Kovac, K.
Leauthaud, A.
Le Floc'h, E.
Massey, R.
McCracken, H. J.
Pozzetti, L.
Renzini, A.
Rhodes, J.
Salvato, M.
Sanders, D. B.
Scoville, N.
Sheth, K.
Taniguchi, Y.
Thompson, D.
TI THE BUILDUP OF THE HUBBLE SEQUENCE IN THE COSMOS FIELD
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE galaxies: elliptical and lenticular, cD; galaxies: evolution; galaxies:
formation; galaxies: irregular; galaxies: spiral; galaxies: structure
ID EARLY-TYPE GALAXIES; DARK-MATTER HALOES; STELLAR MASS; LUMINOSITY
FUNCTIONS; DISK GALAXIES; EVOLUTION; ENVIRONMENT; DEPENDENCE; MERGERS;
POPULATION
AB We use similar to 8600 COSMOS galaxies at mass scales > 5 x 10(10)M(circle dot) to study how the morphological mix of massive ellipticals, bulge-dominated disks, intermediate-bulge disks, disk-dominated galaxies, and irregular systems evolves from z = 0.2 to z = 1. The morphological evolution depends strongly on mass. At M > 3 x 10(11) M(circle dot), no evolution is detected in the morphological mix: ellipticals dominate since z = 1, and the Hubble sequence has quantitatively settled down by this epoch. At the 10(11)M(circle dot) mass scale, little evolution is detected, which can be entirely explained by major mergers. Most of the morphological evolution from z = 1 to z = 0.2 takes place at masses 5 x 10(10)-10(11) M(circle dot), where (1) the fraction of spirals substantially drops and the contribution of early types increases. This increase is mostly produced by the growth of bulge-dominated disks, which vary their contribution from similar to 10% at z = 1 to >30% at z = 0.2 (for comparison, the elliptical fraction grows from similar to 15% to similar to 20%). Thus, at these masses, transformations from late to early types result in diskless elliptical morphologies with a statistical frequency of only 30%-40%. Otherwise, the processes which are responsible for the transformations either retain or produce a non-negligible disk component. (2) The disk-dominated galaxies, which contribute similar to 15% to the intermediate-mass galaxy population at z = 1, virtually disappear by z = 0.2. The merger rate since z = 1 is too low to account for the disappearance of these massive disk-dominated systems, which most likely grow a bulge via secular evolution.
C1 [Oesch, P. A.; Carollo, C. M.; Feldmann, R.; Hahn, O.; Lilly, S. J.; Aller, M. C.; Bschorr, T.; Kovac, K.] Swiss Fed Inst Technol, Inst Astron, CH-8092 Zurich, Switzerland.
[Sargent, M. T.] Max Planck Inst Astron, D-69117 Heidelberg, Germany.
[Scarlata, C.; Capak, P.; Massey, R.; Rhodes, J.; Salvato, M.; Scoville, N.; Sheth, K.; Thompson, D.] CALTECH, Pasadena, CA 91125 USA.
[Aussel, H.] Univ Paris 07, CNRS, UMR 158, AIM Unite Mixte Rech,CEA, Paris, France.
[Bolzonella, M.; Pozzetti, L.] Osservatorio Astron Bologna, INAF, I-40127 Bologna, Italy.
[Bundy, K.] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94705 USA.
[Capak, P.; Sheth, K.] CALTECH, Spitzer Space Ctr, Pasadena, CA 91125 USA.
[Ilbert, O.; Sanders, D. B.; Thompson, D.] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.
[Ilbert, O.; Kneib, J. -P.] Lab Astrophys Marseille, F-13376 Marseille 12, France.
[Koekemoer, A. M.] STScI, Baltimore, MD 21218 USA.
[Leauthaud, A.] Univ Calif Berkeley, LBNL, Berkeley, CA 94720 USA.
[Leauthaud, A.] Univ Calif Berkeley, BCCP, Berkeley, CA 94720 USA.
[Le Floc'h, E.] CEA Saclay, Serv Astrophys, F-91191 Gif Sur Yvette, France.
[Massey, R.] Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland.
[McCracken, H. J.] Univ Paris 06, CNRS, UMR 7095, Inst Astrophys Paris, F-75014 Paris, France.
[Renzini, A.] Univ Padua, Dipartimento Astron, I-35122 Padua, Italy.
[Rhodes, J.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Taniguchi, Y.] Ehime Univ, Res Ctr Space & Cosm Evolut, Matsuyama, Ehime 7908577, Japan.
[Thompson, D.] Univ Arizona, LBT Observ, Tucson, AZ 85721 USA.
RP Oesch, PA (reprint author), Swiss Fed Inst Technol, Inst Astron, CH-8092 Zurich, Switzerland.
RI Hahn, Oliver/A-7715-2015; Kneib, Jean-Paul/A-7919-2015; Bolzonella,
Micol/O-9495-2015;
OI Hahn, Oliver/0000-0001-9440-1152; Koekemoer, Anton/0000-0002-6610-2048;
Massey, Richard/0000-0002-6085-3780; Kneib,
Jean-Paul/0000-0002-4616-4989; Bolzonella, Micol/0000-0003-3278-4607;
Pozzetti, Lucia/0000-0001-7085-0412; Oesch, Pascal/0000-0001-5851-6649
FU Swiss National Foundation (SNF); NASA [NAS 5-26555]
FX We thank the COSMOS and zCOSMOS collaborations for many stimulating
discussions. P.O. acknowledges support from the Swiss National
Foundation (SNF). This work is based on observations with the NASA/ESA
Hubble Space Telescope, obtained at the Space Telescope Science
Institute, which is operated by AURA Inc, under NASA contract NAS
5-26555; also based on data collected at: the Subaru Telescope, which is
operated by the National Astronomical Observatory of Japan; the European
Southern Observatory under Large Program 175.A-0839, Chile; Kitt Peak
National Observatory, Cerro Tololo Inter-American Observatory, and the
National Optical Astronomy Observatory, which are operated by the
Association of Universities for Research in Astronomy, Inc. (AURA) under
cooperative agreement with the National Science Foundation; and the
Canada-France-Hawaii Telescope with MegaPrime/MegaCam operated as a
joint project by the CFHT Corporation, CEA/DAPNIA, the National Research
Council of Canada, the Canadian Astronomy Data Centre, the Centre
National de la Recherche Scientifique de France, TERAPIX, and the
University of Hawaii.
NR 47
TC 57
Z9 57
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD MAY 1
PY 2010
VL 714
IS 1
BP L47
EP L51
DI 10.1088/2041-8205/714/1/L47
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 587EC
UT WOS:000276971300010
ER
PT J
AU Sargent, MT
Carollo, CM
Kampczyk, P
Lilly, SJ
Scarlata, C
Capak, P
Ilbert, O
Koekemoer, AM
Kneib, JP
Leauthaud, A
Massey, R
Oesch, PA
Rhodes, J
Schinnerer, E
Scoville, N
Taniguchi, Y
AF Sargent, M. T.
Carollo, C. M.
Kampczyk, P.
Lilly, S. J.
Scarlata, C.
Capak, P.
Ilbert, O.
Koekemoer, A. M.
Kneib, J. -P.
Leauthaud, A.
Massey, R.
Oesch, P. A.
Rhodes, J.
Schinnerer, E.
Scoville, N.
Taniguchi, Y.
TI THE OPACITY OF GALACTIC DISKS AT z similar to 0.7
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE cosmology: observations; dust, extinction; galaxies: spiral; surveys
ID SPECTRAL ENERGY-DISTRIBUTION; DIGITAL SKY SURVEY; SPIRAL GALAXIES;
STRUCTURAL PARAMETERS; LUMINOSITY FUNCTION; SURFACE BRIGHTNESS; COSMOS
FIELD; EVOLUTION; DUST; REDSHIFT
AB We compare the surface brightness-inclination relation for a sample of COSMOS pure disk galaxies at z similar to 0.7 with an artificially redshifted sample of Sloan Digital Sky Survey (SDSS) disks well matched to the COSMOS sample in terms of rest-frame photometry and morphology, as well as their selection and analysis. The offset between the average surface brightness of face-on and edge-on disks in the redshifted SDSS sample matches that predicted by measurements of the optical depth of galactic disks in the nearby universe. In contrast, large disks at z similar to 0.7 have a virtually flat surface brightness-inclination relation, suggesting that they are more opaque than their local counterparts. This could be explained by either an increased amount of optically thick material in disks at higher redshift or a different spatial distribution of the dust.
C1 [Sargent, M. T.; Schinnerer, E.] Max Planck Inst Astron, D-69117 Heidelberg, Germany.
[Sargent, M. T.; Carollo, C. M.; Kampczyk, P.; Lilly, S. J.; Oesch, P. A.] ETH, Dept Phys, CH-8093 Zurich, Switzerland.
[Scarlata, C.] CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA.
[Ilbert, O.; Kneib, J. -P.] Univ Aix Marseille, CNRS, Lab Astrophys Marseille, F-13388 Marseille 13, France.
[Koekemoer, A. M.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Leauthaud, A.] Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA.
[Massey, R.] Royal Observ, Edinburgh EH9 3HJ, Midlothian, Scotland.
[Rhodes, J.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Taniguchi, Y.] Ehime Univ, Res Ctr Space & Cosm Evolut, Matsuyama, Ehime 7908577, Japan.
RP Sargent, MT (reprint author), Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany.
EM markmr@mpia.de
RI Kneib, Jean-Paul/A-7919-2015;
OI Kneib, Jean-Paul/0000-0002-4616-4989; Oesch, Pascal/0000-0001-5851-6649;
Schinnerer, Eva/0000-0002-3933-7677; Koekemoer,
Anton/0000-0002-6610-2048; Massey, Richard/0000-0002-6085-3780
FU Swiss National Science Foundation; DFG [SCHI 536/3-2]; NASA
[HST-GO-09822]
FX We gratefully acknowledge the anonymous referee's helpful suggestions
and the contribution of the COSMOS collaboration and its more than 100
scientists worldwide. P. K., P.A.O., C. S., and M. T. S. acknowledge
support from the Swiss National Science Foundation. This research was
also financed by DFG grant SCHI 536/3-2. The HST COSMOS Treasury program
was supported through NASA grant HST-GO-09822.
NR 44
TC 4
Z9 4
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD MAY 1
PY 2010
VL 714
IS 1
BP L113
EP L117
DI 10.1088/2041-8205/714/1/L113
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 587EC
UT WOS:000276971300023
ER
PT J
AU Stern, D
Jimenez, R
Verde, L
Stanford, SA
Kamionkowski, M
AF Stern, Daniel
Jimenez, Raul
Verde, Licia
Stanford, S. Adam
Kamionkowski, Marc
TI COSMIC CHRONOMETERS: CONSTRAINING THE EQUATION OF STATE OF DARK ENERGY.
II. A SPECTROSCOPIC CATALOG OF RED GALAXIES IN GALAXY CLUSTERS
SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
LA English
DT Article
DE cosmology: observations
ID REDSHIFT SURVEY CATALOGS; IRAC SHALLOW SURVEY; DIGITAL SKY SURVEY;
WIDE-FIELD SURVEY; DISTANT CLUSTER; VELOCITY DISPERSIONS; SURVEY EDISCS;
ULTRAVIOLET; SIGNATURES; EMISSION
AB We present a spectroscopic catalog of (mostly) red galaxies in 24 galaxy clusters in the redshift range 0.17 < z < 0.92 obtained with the LRIS instrument on the Keck I telescope. Here we describe the observations and the galaxy spectra, including the discovery of three cD galaxies with LINER emission spectra, and the spectroscopic discovery of four new galaxy-galaxy lenses in cluster environments.
C1 [Stern, Daniel] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Jimenez, Raul; Verde, Licia] Univ Barcelona, ICREA, E-08028 Barcelona, Spain.
[Jimenez, Raul; Verde, Licia] Univ Barcelona, Inst Sci Cosmos ICC, E-08028 Barcelona, Spain.
[Stanford, S. Adam] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
[Stanford, S. Adam] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94551 USA.
[Kamionkowski, Marc] CALTECH, Pasadena, CA 91125 USA.
RP Stern, D (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr,Mail Stop 169-506, Pasadena, CA 91109 USA.
EM stern@zwolfkinder.jpl.nasa.gov
OI Kamionkowski, Marc/0000-0001-7018-2055; Verde,
Licia/0000-0003-2601-8770; Jimenez, Raul/0000-0002-3370-3103
FU NASA; Spanish Ministerio de Ciencia e Innovacion; European Union; DoE
[DE-FG03-92-ER40701]; Gordon and Betty Moore Foundation
FX The authors recognize and acknowledge the very significant cultural role
and reverence that the summit of Mauna Kea has always had within the
indigenous Hawaiian community; we are most fortunate to have the
opportunity to conduct observations from this mountain. We thank M.
Kasliwal for assistance with the P60 scheduling, F. Harrison and R.
Griffith for assisting with the 2009 March Keck observations, L.
Moustakas for useful discussions of the new gravitational lenses, and A.
Barth and A. Edge for interesting discussions of the cD galaxy spectra.
We also thank H. Ebeling for checking our MACS spectroscopic results
against his unpublished results; in almost all cases, our results agreed
with Delta z <= 0.004. We are grateful to the referee for a timely and
helpful report. Astrometry for two of the 2005 masks was provided by
astrometry. net (Lang et al. 2010). The work of DS was carried out at
Jet Propulsion Laboratory, California Institute of Technology, under a
contract with NASA. R. J. and L. V. acknowledge support from the Spanish
Ministerio de Ciencia e Innovacion and the European Union FP7 program.
M. K. was supported by DoE DE-FG03-92-ER40701 and the Gordon and Betty
Moore Foundation. This research made use of the NASA/IPAC Extragalactic
Database (NED) which is operated by the Jet Propulsion Laboratory,
California Institute of Technology, under contract with NASA. Figure 8
is based on observations made with the NASA/ESA Hubble Space Telescope,
and obtained from the Hubble Legacy Archive, which is a collaboration
between the Space Telescope Science Institute (STScI/NASA), the Space
Telescope European Coordinating Facility (ST-ECF/ESA), and the Canadian
Astronomy Data Centre (CADC/NRC/CSA).
NR 54
TC 35
Z9 36
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0067-0049
EI 1538-4365
J9 ASTROPHYS J SUPPL S
JI Astrophys. J. Suppl. Ser.
PD MAY
PY 2010
VL 188
IS 1
BP 280
EP 289
DI 10.1088/0067-0049/188/1/280
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 591LQ
UT WOS:000277302500011
ER
PT J
AU Kobelev, AP
Stefanovksii, SV
Lebedev, VV
Polkanov, MA
Knyazev, OA
Ptashkin, AG
Marra, J
AF Kobelev, A. P.
Stefanovksii, S. V.
Lebedev, V. V.
Polkanov, M. A.
Knyazev, O. A.
Ptashkin, A. G.
Marra, J.
TI VITRIFICATION OF A HIGH-LEVEL IRON-ALUMINATE WASTES SIMULATOR IN A COLD
CRUCIBLE
SO ATOMIC ENERGY
LA English
DT Article
ID BOROSILICATE GLASSES
AB An increase of the water content of a simulator of sludges from the test area at the Savannah River Plant (USA) which are vitrified in a cold crucible with inner diameter 236 mm from 50 to 70 wt % results in a substantial reduction of the mass loading rate of the sludge, production of molten glass, and specific production of the glass product. The specific energy expenditures on vitrification increase by more than a factor of 2. The formation of an undesirable nepheline phase is observed in samples containing more than 60 wt % wastes simulator. The chemical stability of the glass product remains high even when its wastes-simulator content is 65 wt %.
C1 [Kobelev, A. P.; Stefanovksii, S. V.; Lebedev, V. V.; Polkanov, M. A.; Knyazev, O. A.; Ptashkin, A. G.] MosNPO Radon, Moscow, Russia.
[Marra, J.] Savannah River Natl Lab, Savannah, GA USA.
RP Kobelev, AP (reprint author), MosNPO Radon, Moscow, Russia.
NR 11
TC 1
Z9 1
U1 0
U2 4
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1063-4258
J9 ATOM ENERGY+
JI Atom. Energy
PD MAY
PY 2010
VL 108
IS 1
BP 33
EP 39
PG 7
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 592OD
UT WOS:000277388000006
ER
PT J
AU Matzen, LE
Benz, ZO
Dixon, KR
Posey, J
Kroger, JK
Speed, AE
AF Matzen, Laura E.
Benz, Zachary O.
Dixon, Kevin R.
Posey, Jamie
Kroger, James K.
Speed, Ann E.
TI Recreating Raven's: Software for systematically generating large numbers
of Raven-like matrix problems with normed properties
SO BEHAVIOR RESEARCH METHODS
LA English
DT Article
ID PROGRESSIVE MATRICES; PREFRONTAL CORTEX; ITEM DIFFICULTY; INTELLIGENCE;
COMPLEXITY; FLUID
AB Raven's Progressive Matrices is a widely used test for assessing intelligence and reasoning ability (Raven, Court, & Raven, 1998). Since the test is nonverbal, it can be applied to many different populations and has been used all over the world (Court & Raven, 1995). However, relatively few matrices are in the sets developed by Raven, which limits their use in experiments requiring large numbers of stimuli. For the present study, we analyzed the types of relations that appear in Raven's original Standard Progressive Matrices (SPMs) and created a software tool that can combine the same types of relations according to parameters chosen by the experimenter, to produce very large numbers of matrix problems with specific properties. We then conducted a norming study in which the matrices we generated were compared with the actual SPMs. This study showed that the generated matrices both covered and expanded on the range of problem difficulties provided by the SPMs.
C1 [Matzen, Laura E.; Benz, Zachary O.; Dixon, Kevin R.; Speed, Ann E.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Posey, Jamie; Kroger, James K.] New Mexico State Univ, Las Cruces, NM 88003 USA.
RP Matzen, LE (reprint author), Sandia Natl Labs, POB 5800,Mail Stop 1188, Albuquerque, NM 87185 USA.
EM lematze@sandia.gov
NR 13
TC 17
Z9 17
U1 2
U2 7
PU PSYCHONOMIC SOC INC
PI AUSTIN
PA 1710 FORTVIEW RD, AUSTIN, TX 78704 USA
SN 1554-351X
J9 BEHAV RES METHODS
JI Behav. Res. Methods
PD MAY
PY 2010
VL 42
IS 2
BP 525
EP 541
DI 10.3758/BRM.42.2.525
PG 17
WC Psychology, Mathematical; Psychology, Experimental
SC Psychology
GA 702TY
UT WOS:000285920000018
PM 20479184
ER
PT J
AU Canella, D
Gilmour, SJ
Kuhn, LA
Thomashow, MF
AF Canella, Donatella
Gilmour, Sarah J.
Kuhn, Leslie A.
Thomashow, Michael F.
TI DNA binding by the Arabidopsis CBF1 transcription factor requires the
PKKP/RAGRxKFxETRHP signature sequence
SO BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS
LA English
DT Article
DE AP2/ERF domain; Arabidopsis; CBF/DREB1 transcription factor; DNA
binding; Signature sequence
ID GREEN-FLUORESCENT PROTEIN; ETHYLENE-RESPONSIVE ELEMENT; SITE-DIRECTED
MUTAGENESIS; LOW-TEMPERATURE; GENE-EXPRESSION; NUCLEAR-LOCALIZATION;
FREEZING TOLERANCE; DOMAIN; PLANT; THALIANA
AB The CBF/DREB1 transcriptional activators are key regulators of plant freezing tolerance. They are members of the AP2/ERF multi-gene family, which in Arabidopsis comprises about 145 members. Common to these proteins is the AP2/ERF DNA-binding domain, a 60-amino-acid fold composed of a three-stranded beta-sheet followed by a C-terminal cc-helix. A feature that distinguishes the CBF proteins from the other AP2/ERF proteins is the presence of "signature sequences," PKKP/RAGRxKFxETRHP (abbreviated PKKPAGR) and DSAWR, which are located immediately upstream and downstream, respectively, of the AP2/ERF DNA-binding domain. The signature sequences are highly conserved in CBF proteins from diverse plant species suggesting that they have an important functional role. Here we show that the PKKPAGR sequence of AtCBF1 is essential for its transcriptional activity. Deletion of the sequence or mutations within it greatly impaired the ability of CBF1 to induce expression of its target genes. This impairment was not due to the mutations eliminating CBF1 localization to the nucleus or preventing protein accumulation. Rather, we show that this loss of function was due to the mutations greatly impairing the ability of the CBF1 protein to bind to its DNA recognition sequence, the CRT/DRE element. These results establish that the ability of the CBF proteins to bind to the CRT/DRE element requires amino acids that extend beyond the AP2/ERF DNA-binding domain and raise the possibility that the PKKPAGR sequence contributes to determining the DNA-binding specificity of the CBF proteins. (C) 2009 Elsevier B.V. All rights reserved,
C1 [Canella, Donatella; Gilmour, Sarah J.; Thomashow, Michael F.] Michigan State Univ, MSU DOE Plant Res Lab, E Lansing, MI 48824 USA.
[Canella, Donatella; Kuhn, Leslie A.] Michigan State Univ, Dept Biochem & Mol Biol, E Lansing, MI 48824 USA.
[Kuhn, Leslie A.] Michigan State Univ, Dept Comp Sci & Engn, E Lansing, MI 48824 USA.
[Kuhn, Leslie A.] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA.
RP Thomashow, MF (reprint author), Michigan State Univ, MSU DOE Plant Res Lab, E Lansing, MI 48824 USA.
EM thomash6@msu.edu
FU NSF Plant Genome Project [DBI 0110124, DBI 0701709]; Department of
Energy [DE-FG02-91ER20021]; Michigan Agricultural Experiment Station
FX This research was supported in part by grants to MFT from the NSF Plant
Genome Project (DBI 0110124 and DBI 0701709), the Department of Energy
(DE-FG02-91ER20021) and the Michigan Agricultural Experiment Station.
NR 38
TC 22
Z9 28
U1 1
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1874-9399
EI 0006-3002
J9 BBA-GENE REGUL MECH
JI Biochim. Biophys. Acta-Gene Regul. Mech.
PD MAY-JUN
PY 2010
VL 1799
IS 5-6
BP 454
EP 462
DI 10.1016/j.bbagrm.2009.11.017
PG 9
WC Biochemistry & Molecular Biology; Biophysics
SC Biochemistry & Molecular Biology; Biophysics
GA 605BD
UT WOS:000278321400011
PM 19948259
ER
PT J
AU Chen, SY
Zhao, XR
Chen, JY
Chen, J
Kuznetsova, L
Wong, SS
Ojima, I
AF Chen, Shuyi
Zhao, Xianrui
Chen, Jingyi
Chen, Jin
Kuznetsova, Larisa
Wong, Stanislaus S.
Ojima, Iwao
TI Mechanism-Based Tumor-Targeting Drug Delivery System. Validation of
Efficient Vitamin Receptor-Mediated Endocytosis and Drug Release
SO BIOCONJUGATE CHEMISTRY
LA English
DT Article
ID BIOLOGICAL EVALUATION; MEDICINAL CHEMISTRY; ANTICANCER AGENTS; TAXOIDS;
CELLS; CHEMOTHERAPY; ACID; DOXORUBICIN; POTENT; GSH
AB An efficient mechanism-based tumor-targeting drug delivery system. based on tumor-specific vitamin-receptor mediated endocytosis, has been developed. The tumor-targeting drug delivery system is a conjugate of a tumor-targeting molecule (biotin: vitamin H or vitamin B-7), a mechanism-based self-immolative linker and a second-generation taxoid (SB-T-1214) as the cytotoxic agent. This conjugate (1) is designed to be (i) specific to the vitamin receptors overexpressed on tumor cell surface and (ii) internalized efficiently through receptor-mediated endocytosis, followed by smooth drug release via glutathione-triggered self-immolation of the linker. In order to monitor and validate the sequence of events hypothesized. i.e., receptor-mediated endocytosis of the conjugate, drug release, and drug-binding to the target protein (microtubules), three fluorescent/fluorogenic molecular probes (2, 3, and 4) were designed and synthesized. The actual occurrence of these processes was unambiguously confirmed by means of confocal fluorescence microscopy (CFM) and flow cytometry using L1210FR leukemia cells, overexpressing biotin receptors. The molecular probe 4, hearing the taxoid linked to fluorescein, was also used to examine the cell specificity (i.e., efficacy of receptor-based cell targeting) for three cell lines, L1210FR (biotin receptors overexpressed), L1210 (biotin receptors not overexpressed), and W138 (normal human lung fibroblast, biotin receptor negative). As anticipated, the molecular probe 4 exhibited high specificity only to L1210FR. To confirm the direct correlation between the cell-specific drug delivery and anticancer activity of the probe 4, its cytotoxicity against these three cell lines was also examined. The results clearly showed a good correlation between the two methods. In the same manner, excellent cell-specific cytotoxicity of the conjugate 1 (without fluorescein at to the taxoid) against the same three cell lines was confirmed. This mechanism-based to drug delivery system will find a range of applications.
C1 [Chen, Shuyi; Zhao, Xianrui; Chen, Jin; Kuznetsova, Larisa; Wong, Stanislaus S.; Ojima, Iwao] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
[Ojima, Iwao] SUNY Stony Brook, Inst Chem Biol & Drug Discovery, Stony Brook, NY 11794 USA.
[Chen, Jingyi; Wong, Stanislaus S.] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
RP Ojima, I (reprint author), SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
EM iojima@notes.cc.sunysb.edu
RI Chen, Jingyi/E-7168-2010
OI Chen, Jingyi/0000-0003-0012-9640
FU National Institutes of Health [GM427980, CA 103314]; National Science
Foundation [CAREER DMR-0348239]; Battelle Memorial Institute [CRADA
05-25]; U.S. Department of Energy Office of Basic Energy Sciences
[DE-AC-02-98CH10886]
FX This work was supported by grants from the National Institutes of Health
(GM427980 and CA 103314 to I.O.) and the National Science Foundation
(CAREER DMR-0348239 to S.S.W.). J.C. thanks the Battelle Memorial
Institute for support through CRADA #05-25, administered by Brookhaven
National Laboratory (BNL). Work at BNL was also supported by the U.S.
Department of Energy Office of Basic Energy Sciences under Contract
DE-AC-02-98CH10886. The authors thank Dr. Gregory Russell-Jones (Access
Pharmaceuticals Australia Pty Ltd.) for providing the L1210FR cell
lines, Dr. Rebecca A. Rowehl for cell culture, and Dr. Guo-wei Tian for
the assistance with confocal microscopy imaging.
NR 44
TC 91
Z9 94
U1 11
U2 70
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1043-1802
J9 BIOCONJUGATE CHEM
JI Bioconjugate Chem.
PD MAY
PY 2010
VL 21
IS 5
BP 979
EP 987
DI 10.1021/bc9005656
PG 9
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
Chemistry, Multidisciplinary; Chemistry, Organic
SC Biochemistry & Molecular Biology; Chemistry
GA 596KI
UT WOS:000277683300024
PM 20429547
ER
PT J
AU Zhi, DG
Shatsky, M
Brenner, SE
AF Zhi, Degui
Shatsky, Maxim
Brenner, Steven E.
TI Alignment-free local structural search by writhe decomposition
SO BIOINFORMATICS
LA English
DT Article
ID COMPARING PROTEIN STRUCTURES; SHAPE STRINGS; CLASSIFICATION; ALGORITHM;
CONFORMATION; RECOGNITION; SIMILARITY; DATABASE; FOLDS
AB Motivation: Rapid methods for protein structure search enable biological discoveries based on flexibly defined structural similarity, unleashing the power of the ever greater number of solved protein structures. Projection methods show promise for the development of fast structural database search solutions. Projection methods map a structure to a point in a high-dimensional space and compare two structures by measuring distance between their projected points. These methods offer a tremendous increase in speed over residue-level structural alignment methods. However, current projection methods are not practical, partly because they are unable to identify local similarities.
Results: We propose a new projection-based approach that can rapidly detect global as well as local structural similarities. Local structural search is enabled by a topology-inspired writhe decomposition protocol that produces a small number of fragments while ensuring that similar structures are cut in a similar manner. In benchmark tests, we show that our method, writher, improves accuracy over existing projection methods in terms of recognizing scop domains out of multi-domain proteins, while maintaining accuracy comparable with existing projection methods in a standard single-domain benchmark test.
C1 [Zhi, Degui; Shatsky, Maxim; Brenner, Steven E.] UC Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA.
[Shatsky, Maxim; Brenner, Steven E.] LBNL, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Zhi, DG (reprint author), Univ Alabama, Dept Biostat, Ryals Publ Hlth Bldg 327, Birmingham, AL 35294 USA.
EM dzhi@compbio.berkeley.edu
RI Brenner, Steven/A-8729-2008
OI Brenner, Steven/0000-0001-7559-6185
FU National Institute of Health [R01 GM073109, K99/R00 RR024163];
Department of Energy [DE AC03 76SF00098]; Alfred P. Sloan Foundation
FX National Institute of Health (R01 GM073109 and K99/R00 RR024163); the
Department of Energy (DE AC03 76SF00098); an Alfred P. Sloan Foundation
research fellowship.
NR 41
TC 2
Z9 2
U1 0
U2 8
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 1367-4803
J9 BIOINFORMATICS
JI Bioinformatics
PD MAY 1
PY 2010
VL 26
IS 9
BP 1176
EP 1184
DI 10.1093/bioinformatics/btq127
PG 9
WC Biochemical Research Methods; Biotechnology & Applied Microbiology;
Computer Science, Interdisciplinary Applications; Mathematical &
Computational Biology; Statistics & Probability
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
Computer Science; Mathematical & Computational Biology; Mathematics
GA 590KT
UT WOS:000277225400007
PM 20371498
ER
PT J
AU Fowler, JS
Wang, GJ
Volkow, ND
AF Fowler, Joanna S.
Wang, Gene-Jack
Volkow, Nora D.
TI PET Imaging of Methamphetamine Distribution and Kinetics in Humans
SO BIOLOGICAL PSYCHIATRY
LA English
DT Meeting Abstract
CT 65th Annual Convention of the Society-of-Biological-Psychiatry
CY MAY 20-22, 2010
CL New Orleans, LA
SP Soc Biol Psychiat
C1 [Fowler, Joanna S.; Wang, Gene-Jack] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Volkow, Nora D.] Natl Inst Drug Abuse, Bethesda, MD USA.
NR 0
TC 0
Z9 0
U1 0
U2 5
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0006-3223
J9 BIOL PSYCHIAT
JI Biol. Psychiatry
PD MAY 1
PY 2010
VL 67
IS 9
SU S
MA 329
BP 94S
EP 94S
PG 1
WC Neurosciences; Psychiatry
SC Neurosciences & Neurology; Psychiatry
GA 588IX
UT WOS:000277064200301
ER
PT J
AU Volkow, ND
Wang, GJ
Kollins, S
Wigal, T
Newcorn, J
Telang, F
Fowler, J
Swanson, J
AF Volkow, Nora D.
Wang, Gene-Jack
Kollins, Scott
Wigal, Tim
Newcorn, Jeffrey
Telang, Frank
Fowler, Joanna
Swanson, James
TI Dopamine's Role in ADHD Symptoms: Beyond an Attention Deficit
SO BIOLOGICAL PSYCHIATRY
LA English
DT Meeting Abstract
CT 65th Annual Convention of the Society-of-Biological-Psychiatry
CY MAY 20-22, 2010
CL New Orleans, LA
SP Soc Biol Psychiat
C1 [Volkow, Nora D.] Natl Inst Drug Abuse, Bethesda, MD 11973 USA.
[Wang, Gene-Jack; Fowler, Joanna] Brookhaven Natl Lab, Upton, NY USA.
[Kollins, Scott] Duke Univ, Med Ctr, Durham, NC USA.
[Wigal, Tim; Swanson, James] Univ Calif Irvine, Irvine, CA 10029 USA.
[Newcorn, Jeffrey] Mt Sinai Med Ctr, New York, NY USA.
[Telang, Frank] NIAAA, Bethesda, MD USA.
RI Kollins, Scott/G-2965-2012
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0006-3223
J9 BIOL PSYCHIAT
JI Biol. Psychiatry
PD MAY 1
PY 2010
VL 67
IS 9
SU S
MA 336
BP 96S
EP 96S
PG 1
WC Neurosciences; Psychiatry
SC Neurosciences & Neurology; Psychiatry
GA 588IX
UT WOS:000277064200308
ER
PT J
AU Wang, GJ
Volkow, ND
Fowler, JS
AF Wang, Gene-Jack
Volkow, Nora D.
Fowler, Joanna S.
TI Drug Addiction and Obesity: Results of Maladaptation to Modern
Environment?
SO BIOLOGICAL PSYCHIATRY
LA English
DT Meeting Abstract
CT 65th Annual Convention of the Society-of-Biological-Psychiatry
CY MAY 20-22, 2010
CL New Orleans, LA
SP Soc Biol Psychiat
C1 [Wang, Gene-Jack; Fowler, Joanna S.] Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA.
[Volkow, Nora D.] Natl Inst Drug Abuse, Rockville, MD USA.
NR 0
TC 0
Z9 0
U1 0
U2 6
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0006-3223
J9 BIOL PSYCHIAT
JI Biol. Psychiatry
PD MAY 1
PY 2010
VL 67
IS 9
SU S
MA 654
BP 184S
EP 184S
PG 1
WC Neurosciences; Psychiatry
SC Neurosciences & Neurology; Psychiatry
GA 588IX
UT WOS:000277064200584
ER
PT J
AU Liu, F
Hakami, RM
Dyas, B
Bahta, M
Lountos, GT
Waugh, DS
Ulrich, RG
Burke, TR
AF Liu, Fa
Hakami, Ramin Mollaaghababa
Dyas, Beverly
Bahta, Medhanit
Lountos, George T.
Waugh, David S.
Ulrich, Robert G.
Burke, Terrence R., Jr.
TI A rapid oxime linker-based library approach to identification of
bivalent inhibitors of the Yersinia pestis protein-tyrosine phosphatase,
YopH
SO BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
LA English
DT Article
DE Protein-tyrosine phosphatase; Yersinia pestis; YopH; Inhibitor
ID DRUG DISCOVERY; CANCER; ACIDS
AB A bivalent tethered approach toward YopH inhibitor development is presented that joins aldehydes with mixtures of bis-aminooxy-containing linkers using oxime coupling. The methodology is characterized by its facility and ease of use and its ability to rapidly identify low micromolar affinity inhibitors. The generality of the approach may potentially make it amenable to the development of bivalent inhibitors directed against other phosphatases. Published by Elsevier Ltd.
C1 [Liu, Fa; Bahta, Medhanit; Burke, Terrence R., Jr.] NCI, Biol Chem Lab, Mol Discovery Program, Ctr Canc Res,NIH, Frederick, MD 21702 USA.
[Hakami, Ramin Mollaaghababa] Oak Ridge Associated Univ, Fac Res Participat Program, Belcamp, MD 21017 USA.
[Hakami, Ramin Mollaaghababa; Dyas, Beverly; Ulrich, Robert G.] USA, Med Res Inst Infect Dis, Lab Mol Immunol, Frederick, MD 21702 USA.
[Lountos, George T.; Waugh, David S.] NCI, Macromol Crystallog Lab, Ctr Canc Res, NIH, Frederick, MD 21702 USA.
RP Liu, F (reprint author), Lilly Res Labs, Indianapolis, IN 46285 USA.
EM tburke@helix.nih.gov
RI Burke, Terrence/N-2601-2014; Lountos, George/B-3983-2015
FU NIH, Center for Cancer Research, NCI-Frederick; National Cancer
Institute, National Institutes of Health and the Joint Science and
Technology Office of the Department of Defense
FX Appreciation is expressed to Afroz Sultana (LMI) for technical support.
This work was supported in part by the Intramural Research Program of
the NIH, Center for Cancer Research, NCI-Frederick and the National
Cancer Institute, National Institutes of Health and the Joint Science
and Technology Office of the Department of Defense. The content of this
publication does not necessarily reflect the views or policies of the
Department of Health and Human Services, nor does mention of trade
names, commercial products, or organizations imply endorsement by the
U.S. Government. Appreciation is expressed to Afroz Sultana (LMI), Scott
Cherry and Joe Tropea (MCL) for technical support.
NR 30
TC 15
Z9 15
U1 0
U2 4
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0960-894X
J9 BIOORG MED CHEM LETT
JI Bioorg. Med. Chem. Lett.
PD MAY 1
PY 2010
VL 20
IS 9
BP 2813
EP 2816
DI 10.1016/j.bmcl.2010.03.058
PG 4
WC Chemistry, Medicinal; Chemistry, Organic
SC Pharmacology & Pharmacy; Chemistry
GA 585HT
UT WOS:000276816600024
PM 20350805
ER
PT J
AU Shuai, L
Yang, Q
Zhu, JY
Lu, FC
Weimer, PJ
Ralph, J
Pan, XJ
AF Shuai, L.
Yang, Q.
Zhu, J. Y.
Lu, F. C.
Weimer, P. J.
Ralph, J.
Pan, X. J.
TI Comparative study of SPORL and dilute-acid pretreatments of spruce for
cellulosic ethanol production
SO BIORESOURCE TECHNOLOGY
LA English
DT Article
DE SPORL pretreatment; Dilute-acid pretreatment; Enzymatic
saccharification; Fermentation; Lignin
ID ENZYMATIC-HYDROLYSIS; LIGNOCELLULOSIC BIOMASS; HYBRID POPLAR; CORN
STOVER; SOFTWOOD; BIOFUELS; LIGNIN; SACCHARIFICATION; TECHNOLOGIES;
SUBSTRATE
AB The performance of two pretreatment methods, sulfite pretreatment to overcome recalcitrance of lignocellulose (SPORL) and dilute acid (DA), was compared in pretreating softwood (spruce) for fuel ethanol production at 180 degrees C for 30 min with a sulfuric acid loading of 5% on oven-dry wood and a 5:1 liquor-to-wood ratio. SPORL was supplemented with 9% sodium sulfite (w/w of wood). The recoveries of total saccharides (hexoses and pentoses) were 87.9% (SPORL) and 56.7% (DA), while those of cellulose were 92.5% (SPORL) and 77.7% (DA). The total of known inhibitors (furfural, 5-hydroxymethylfurfural, and formic, acetic and levulinic acids) formed in SPORL were only 35% of those formed in DA pretreatment. SPORL pretreatment dissolved approximately 32% of the lignin as lignosulfonate, which is a potential high-value co-product. With an enzyme loading of 15 FPU (filter paper units) per gram of cellulose, the cellulose-to-glucose conversion yields were 91% at 24 h for the SPORL substrate and 55% at 48 h for the DA substrate, respectively. (C) 2009 Elsevier Ltd. All rights reserved.
C1 [Lu, F. C.; Ralph, J.; Pan, X. J.] Univ Wisconsin, DOE Great Lakes Bioenergy Res Ctr, Madison, WI 53706 USA.
[Zhu, J. Y.] US Forest Serv, USDA, Forest Prod Lab, Madison, WI 53726 USA.
[Weimer, P. J.] US Dairy Forage Res Ctr, Madison, WI 53706 USA.
RP Pan, XJ (reprint author), Univ Wisconsin, DOE Great Lakes Bioenergy Res Ctr, 460 Henry Mall, Madison, WI 53706 USA.
EM xpan@wisc.edu
RI mei, chaoqun/B-9857-2011; Shuai, Li/B-2342-2015
FU USDA
FX The support of this work is provided by USDA Forest Service's biomass
program (2008) to J.Y. Zhu and X.J. Pan and partially by Graduate School
of the University of Wisconsin-Madison to X.J. Pan. The authors thank R.
Gleisner and D. Mann for their assistance in operating digester for the
pretreatments. We thank the US Dairy Forage Research Center for the NMR
access.
NR 38
TC 106
Z9 114
U1 4
U2 58
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0960-8524
EI 1873-2976
J9 BIORESOURCE TECHNOL
JI Bioresour. Technol.
PD MAY
PY 2010
VL 101
IS 9
BP 3106
EP 3114
DI 10.1016/j.biortech.2009.12.044
PG 9
WC Agricultural Engineering; Biotechnology & Applied Microbiology; Energy &
Fuels
SC Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels
GA 561JN
UT WOS:000274972600028
PM 20061141
ER
PT J
AU Hu, ZJ
Sykes, R
Davis, MF
Brummer, EC
Ragauskas, AJ
AF Hu, Zhoujian
Sykes, Robert
Davis, Mark F.
Brummer, E. Charles
Ragauskas, Arthur J.
TI Chemical profiles of switchgrass
SO BIORESOURCE TECHNOLOGY
LA English
DT Article
DE Switchgrass; Morphological components; Chemical compositions; Ash
content; Lignin S:G ratio
ID LIGNOCELLULOSIC MATERIALS; HERBACEOUS BIOMASS; BIOFUELS; LIGNIN;
FEEDSTOCK
AB Chemical analysis Studies were conducted for four populations of switchgrass (Alamo, Kanlow, GA993, and GA992), Panicum virgatum L., which were partitioned into leaves, internodes. and nodes. The variations in carbohydrate compositions, lignin and extractives content, higher heating value (HHV), and the syringyl:guaiacyl ratio of switchgrass were determined. The experimental results indicated that bulk chemical profiles for the four populations of switchgrass were comparable. However, the results from three morphological components of switchgrass, leaves, internodes and nodes, provided a significant diversity among the analytical results Studied. (C) 2009 Elsevier Ltd. All rights reserved.
C1 [Hu, Zhoujian; Ragauskas, Arthur J.] Georgia Inst Technol, Sch Chem & Biochem, Inst Paper Sci & Technol, Atlanta, GA 30332 USA.
[Sykes, Robert; Davis, Mark F.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Brummer, E. Charles] Univ Georgia, Dept Crop & Soil Sci, Inst Plant Breeding Genet & Genom, Athens, GA 30602 USA.
[Ragauskas, Arthur J.] Chalmers, Forest Prod & Chem Engn Dept, SE-41296 Gothenburg, Sweden.
RP Ragauskas, AJ (reprint author), Georgia Inst Technol, Sch Chem & Biochem, Inst Paper Sci & Technol, Atlanta, GA 30332 USA.
EM arthur.ragauskas@chemistry.gatech.edu
OI davis, mark/0000-0003-4541-9852; Ragauskas, Arthur/0000-0002-3536-554X
FU DOE Office of Biological and Environmental Research through the
BioEnergy Science Center (BESC); Office of Biological and Environmental
Research in the DOE Office of Science; IPSTatGT; Fulbright Fellowship
FX This work was supported, in part, by the DOE Office of Biological and
Environmental Research through the BioEnergy Science Center (BESC).
BioEnergy Science Center (BESC) is a US Department of Energy Bioenergy
Research Center supported by the Office of Biological and Environmental
Research in the DOE Office of Science. Zhoujian Hu is grateful to the
financial Support of the IPST@GT fellowship program. Arthur J. Ragauskas
also wishes to thank the support of the Fulbright Fellowship program for
the support of Distinguished Chair in Alternative Energy.
NR 26
TC 40
Z9 41
U1 1
U2 24
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0960-8524
J9 BIORESOURCE TECHNOL
JI Bioresour. Technol.
PD MAY
PY 2010
VL 101
IS 9
BP 3253
EP 3257
DI 10.1016/j.biortech.2009.12.033
PG 5
WC Agricultural Engineering; Biotechnology & Applied Microbiology; Energy &
Fuels
SC Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels
GA 561JN
UT WOS:000274972600049
PM 20074945
ER
PT J
AU Mattozzi, MD
Keasling, JD
AF Mattozzi, Matthew de la Pena
Keasling, Jay D.
TI Rationally Engineered Biotransformation of p-Nitrophenol
SO BIOTECHNOLOGY PROGRESS
LA English
DT Article
DE biodegradation; metabolic engineering; organophosphate; paraoxon;
Pseudomonas putida
ID PSEUDOMONAS-PUTIDA DOT-T1E; NITROAROMATIC COMPOUNDS; BIODEGRADATION;
DEGRADATION; PATHWAY; BIOREMEDIATION; TOLUENE; GENES
AB An operon encoding enzymes responsible for degradation of the EPA priority contaminant para-nitrophenol (PNP) from Pseudomonas sp. ENV2030 contains more genes than would appear to be necessary to mineralize PNP. To determine some necessary genes for PNP degradation, the genes encoding the proposed enzymes in the degradation pathway (pnpADEC) were assembled into a broad-host-range, BioBricks-compatible vector under the control of a constitutive promoter. These were introduced into. Escherichia coli DH10b and two Pseudomonas putida strains, one with a knockout of the aromatic transport TtgB and the parent with the native transporter. The engineered strains were assayed for PNP removal. E. coli DH10b harboring several versions of the refactored pathway was able to remove PNP from the medium up to a concentration of 0.2 mM; above which PNP was toxic to E. coli. A strain of P. putida harboring the PNP pathway genes was capable of removing PNP from the medium up to 0.5 mM. When P. putida harboring the native PNP degradation cluster was exposed to PNP, pnpADEC were induced, and the resulting production of beta-ketoadipate from PNP induced expression of its chromosomal degradation pathway (pcaIJF). In contrast, pnpADEC were expressed constitutively from the refactored constructs because none of the regulatory genes found in the native PNP degradation cluster were included. Although P. putida harboring the refactored construct was incapable of growing exclusively on PNP as a carbon source, evidence that the engineered pathway was functional was demonstrated by the induced expression of chromosomal pcaIJF. (C) 2010 American Institute of Chemical Engineers Biotechnol. Prog., 26: 616-621, 2010
C1 [Mattozzi, Matthew de la Pena; Keasling, Jay D.] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
[Mattozzi, Matthew de la Pena] Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA.
[Mattozzi, Matthew de la Pena; Keasling, Jay D.] Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
[Mattozzi, Matthew de la Pena; Keasling, Jay D.] Joint BioEnergy Inst, Fuels Synth Grp, Emeryville, CA 94608 USA.
[Keasling, Jay D.] Univ Calif Berkeley, Dept Bioengn, Berkeley, CA 94720 USA.
RP Keasling, JD (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
EM keasling@berkeley.edu
RI Keasling, Jay/J-9162-2012
OI Keasling, Jay/0000-0003-4170-6088
FU NSF; University of California
FX This research was funded by an NSF Graduate Fellowship to MM and by the
University of California Toxic Substances Teaching and Research
Fellowship Program. The authors would like to thank Meghdad Hajimorad
for helpful discussions concerning quantitative PCR. P. putida DOT-TIE
and knockout strains were obtained from the laboratory of J.L. Ramos.
NR 22
TC 2
Z9 2
U1 1
U2 11
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 8756-7938
EI 1520-6033
J9 BIOTECHNOL PROGR
JI Biotechnol. Prog.
PD MAY-JUN
PY 2010
VL 26
IS 3
BP 616
EP 621
DI 10.1002/btpr.382
PG 6
WC Biotechnology & Applied Microbiology; Food Science & Technology
SC Biotechnology & Applied Microbiology; Food Science & Technology
GA 615HG
UT WOS:000279124800002
ER
PT J
AU Hartman, RJ
Rasmussen, SA
Riehle-Colarusso, T
Botto, L
Correa, A
AF Hartman, R. J.
Rasmussen, S. A.
Riehle-Colarusso, T.
Botto, L.
Correa, A.
TI The Contribution of Chromosomal Abnormalities to Congenital Heart
Defects: A Population-Based Study
SO BIRTH DEFECTS RESEARCH PART A-CLINICAL AND MOLECULAR TERATOLOGY
LA English
DT Meeting Abstract
C1 [Hartman, R. J.; Rasmussen, S. A.; Riehle-Colarusso, T.; Correa, A.] CDC, Natl Ctr Birth Defects & Dev Disabil, Atlanta, GA 30333 USA.
[Hartman, R. J.] Oak Ridge Inst Sci & Educ, Oak Ridge, TN USA.
[Botto, L.] Univ Utah, Div Med Genet, Salt Lake City, UT USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1542-0752
EI 1542-0760
J9 BIRTH DEFECTS RES A
JI Birth Defects Res. Part A-Clin. Mol. Teratol.
PD MAY
PY 2010
VL 88
IS 5
BP 369
EP 369
PG 1
WC Developmental Biology; Toxicology
SC Developmental Biology; Toxicology
GA 605AV
UT WOS:000278320600083
ER
PT J
AU Shahnazari, M
Yao, W
Dai, WW
Wang, B
Ionova-Martin, SS
Ritchie, RO
Heeren, D
Burghardt, AJ
Nicolella, DP
Kimiecik, MG
Lane, NE
AF Shahnazari, Mohammad
Yao, Wei
Dai, WeiWei
Wang, Bob
Ionova-Martin, Sophi S.
Ritchie, Robert O.
Heeren, Daniel
Burghardt, Andrew J.
Nicolella, Daniel P.
Kimiecik, Michael G.
Lane, Nancy E.
TI Higher doses of bisphosphonates further improve bone mass, architecture,
and strength but not the tissue material properties in aged rats
SO BONE
LA English
DT Article
DE Bisphosphonate; Bisphosphonate dose; Structural properties; Material
properties; Bone mineralization
ID OVARIECTOMIZED CYNOMOLGUS MONKEYS; FRACTURE INTERVENTION TRIAL;
MICRO-COMPUTED TOMOGRAPHY; POSTMENOPAUSAL OSTEOPOROSIS; TRABECULAR BONE;
VERTEBRAL FRACTURES; BIOMECHANICAL PROPERTIES; MECHANICAL-PROPERTIES;
ALENDRONATE THERAPY; MINERAL DENSITY
AB We report the results of a series of experiments designed to determine the effects of ibandronate (Ibn) and risedronate (Ris) on a number of bone quality parameters in aged osteopenic rats to explain how bone material and bone mass may be affected by the dose of bisphosphonates (BP) and contribute to their anti-fracture efficacy.
Eighteen-month old female rats underwent either ovariectomy or sham surgery. The ovariectomized (OVX) groups were left untreated for 2 months to develop osteopenia. Treatments started at 20 months of age as follows: sham and OVX control (treated with saline), OVX + risedronate 30 and 90 (30 or 90 mu g/kg/dose), and OVX + ibandronate 30 and 90 (30 or 90 mu g/kg/dose). The treatments were given monthly for 4 months by subcutaneous injection. At sacrifice at 24 months of age the 4th lumbar vertebra was used for mu CT scans (bone mass, architecture, and degree of mineralization of bone, DMB) and histomorphometry, and the 6th lumbar vertebra, tibia, and femur were collected for biomechanical testing to determine bone structural and material strength, cortical fracture toughness, and tissue elastic modulus. The compression testing of the vertebral bodies (LVB6) was simulated using finite-element analysis (FEA) to also estimate the bone structural stiffness.
Both Ibn and Ris dose-dependently increased bone mass and improved vertebral bone microarchitecture and mechanical properties compared to OVX control. Estimates of vertebral maximum stress from FEA were correlated with vertebral maximum load (r = 0.5, p < 0.001) and maximum stress (r = 0.4, p < 0.005) measured experimentally. Tibial bone bending modulus and cortical strength increased compared to OVX with both BP but no dose-dependent effect was observed. DMB and elastic modulus of trabecular bone were improved with Ibn 30 compared to OVX but were not affected in other BP-treated groups. DMB of tibial cortical bone showed no change with BP treatments. The fracture toughness examined in midshaft femurs did not change with BP even with the higher doses. In summary, the anti-fracture efficacy of BP is largely due to their preservation of bone mass and while the higher doses further improve the bone structural properties do not improve the localized bone material characteristics such as tissue strength, elastic modulus, and cortical toughness. (C) 2009 Elsevier Inc. All rights reserved.
C1 [Shahnazari, Mohammad; Yao, Wei; Dai, WeiWei; Wang, Bob; Heeren, Daniel; Lane, Nancy E.] Univ Calif Davis, Med Ctr, Dept Internal Med, Sacramento, CA 95817 USA.
[Ionova-Martin, Sophi S.; Ritchie, Robert O.; Kimiecik, Michael G.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Ionova-Martin, Sophi S.; Ritchie, Robert O.; Kimiecik, Michael G.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
[Burghardt, Andrew J.] Univ Calif San Francisco, Dept Radiol & Biomed Imaging, San Francisco, CA 94158 USA.
[Nicolella, Daniel P.] SW Res Inst, Mech & Mat Engn Div, San Antonio, TX 78245 USA.
RP Lane, NE (reprint author), Ctr Healthy Aging Med & Rheumatol, 4800 2nd Ave,Suite 2600, Sacramento, CA 95817 USA.
EM nelane@ucdavis.edu
RI Ritchie, Robert/A-8066-2008
OI Ritchie, Robert/0000-0002-0501-6998
FU National Institutes of Health [R01 AR043052-07, K24 AR-048841];
GlaxoSmithKline [1K12HD05195801]; endowment for aging research at UC
Davis; Center for Healthy Aging at UC Davis
FX This work was funded by National Institutes of Health grants Nos. R01
AR043052-07 and K24 AR-048841 to NEL, 1K12HD05195801, a research grant
from GlaxoSmithKline, and the endowment for aging research at UC Davis
to NEL and the Center for Healthy Aging at UC Davis.
NR 63
TC 21
Z9 22
U1 0
U2 13
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 8756-3282
J9 BONE
JI Bone
PD MAY
PY 2010
VL 46
IS 5
BP 1267
EP 1274
DI 10.1016/j.bone.2009.11.019
PG 8
WC Endocrinology & Metabolism
SC Endocrinology & Metabolism
GA 586VC
UT WOS:000276941000007
PM 19931661
ER
PT J
AU Moeller, SJ
Maloney, T
Parvaz, MA
Alia-Klein, N
Woicik, PA
Telang, F
Wang, GJ
Volkow, ND
Goldstein, RZ
AF Moeller, Scott J.
Maloney, Thomas
Parvaz, Muhammad A.
Alia-Klein, Nelly
Woicik, Patricia A.
Telang, Frank
Wang, Gene-Jack
Volkow, Nora D.
Goldstein, Rita Z.
TI Impaired insight in cocaine addiction: laboratory evidence and effects
on cocaine-seeking behaviour
SO BRAIN
LA English
DT Article
DE cocaine addiction; insight; choice behaviour; neuropsychology; urine
status
ID MONETARY REWARD; AWARENESS; EMOTION; USERS; SENSITIVITY; OPPORTUNITY;
PREDICTORS; ABSTINENCE; DEPENDENCE; RESPONSES
AB Neuropsychiatric disorders are often characterized by impaired insight into behaviour. Such an insight deficit has been suggested, but never directly tested, in drug addiction. Here we tested for the first time this impaired insight hypothesis in drug addiction, and examined its potential association with drug-seeking behaviour. We also tested potential modulation of these effects by cocaine urine status, an individual difference known to impact underlying cognitive functions and prognosis. Sixteen cocaine addicted individuals testing positive for cocaine in urine, 26 cocaine addicted individuals testing negative for cocaine in urine, and 23 healthy controls completed a probabilistic choice task that assessed objective preference for viewing four types of pictures (pleasant, unpleasant, neutral and cocaine). This choice task concluded by asking subjects to report their most selected picture type; correspondence between subjects' self-reports with their objective choice behaviour provided our index of behavioural insight. Results showed that the urine positive cocaine subjects exhibited impaired insight into their own choice behaviour compared with healthy controls; this same study group also selected the most cocaine pictures (and fewest pleasant pictures) for viewing. Importantly, however, it was the urine negative cocaine subjects whose behaviour was most influenced by insight, such that impaired insight in this subgroup only was associated with higher cocaine-related choice on the task and more severe actual cocaine use. These findings suggest that interventions to enhance insight may decrease drug-seeking behaviour, especially in urine negative cocaine subjects, potentially to improve their longer-term clinical outcomes.
C1 [Moeller, Scott J.; Maloney, Thomas; Parvaz, Muhammad A.; Alia-Klein, Nelly; Woicik, Patricia A.; Wang, Gene-Jack; Goldstein, Rita Z.] Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA.
[Moeller, Scott J.] Univ Michigan, Dept Psychol, Ann Arbor, MI 48109 USA.
[Parvaz, Muhammad A.] SUNY Stony Brook, Dept Biomed Engn, Stony Brook, NY 11794 USA.
[Telang, Frank] NIAAA, Intramural Program, Bethesda, MD 20892 USA.
[Volkow, Nora D.] Natl Inst Drug Abuse, Directors Off, Bethesda, MD 20892 USA.
RP Goldstein, RZ (reprint author), Brookhaven Natl Lab, Dept Med, 300 Bell Ave,Bldg 490, Upton, NY 11973 USA.
EM rgoldstein@bnl.gov
RI Moeller, Scott/L-5549-2016;
OI Moeller, Scott/0000-0002-4449-0844; Parvaz, Muhammad/0000-0002-2671-2327
FU National Institute on Drug Abuse [1R01DA023579, R21DA02062]; General
Clinical Research Center [5-MO1-RR-10710]
FX National Institute on Drug Abuse (grants 1R01DA023579, R21DA02062 to R.
Z. G.) and the General Clinical Research Center (5-MO1-RR-10710).
NR 38
TC 35
Z9 35
U1 3
U2 6
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0006-8950
J9 BRAIN
JI Brain
PD MAY
PY 2010
VL 133
BP 1484
EP 1493
DI 10.1093/brain/awq066
PN 5
PG 10
WC Clinical Neurology; Neurosciences
SC Neurosciences & Neurology
GA 590KV
UT WOS:000277225700026
PM 20395264
ER
PT J
AU Wahl, JH
Colburn, HA
AF Wahl, Jon H.
Colburn, Heather A.
TI Extraction of chemical impurities for forensic investigations: A case
study for indoor releases of a sarin surrogate
SO BUILDING AND ENVIRONMENT
LA English
DT Article
DE Volatile organic compounds; Chemical extraction; Surrogate; Wallboard;
Building contamination
ID VOLATILE ORGANIC-COMPOUNDS; BUILDING-MATERIALS; MATERIAL-SURFACES;
DYNAMIC-BEHAVIOR; COMPOUNDS VOCS; NERVE AGENTS; SORPTION; NICOTINE;
CHAMBER; MODEL
AB A solvent extraction approach was developed and examined for extraction of targeted organophosphorus compounds as well as nerve agent simulants from painted wallboard (PWB). Painted wallboard was chosen as a substrate due to its presence as large surface area media in an indoor environment that is applicable to a chemical agent release scenario. Three different solvent systems were examined with a 1:1 methylene chloride: acetone mixture having the most robust and consistent extraction for four target organophosphorus compounds [dimethyl methyl phosphonate (DMMP), diethyl methyl phosphonate (DEMP), diethyl methyl phosphonothioate (DEMPT), and diisopropyl methyl phosphonate (DIMP)]. An average extraction efficiency of approximately 60% was obtained for these four compounds. The extraction approach was further demonstrated by extracting and detecting the chemical impurities present in neat DMMP that was vapor deposited onto painted wallboard tickets as a simulant to an agent release. Five chemical impurities that were present in DMMP - dimethyl phosphate, trimethyl ester phosphoric acid, ethyl methyl methylphosphonate, O,O,S-trimethyl ester phosphorothioic acid, and biphenyl were detected on the PWB and were utilized to determine the source/supplier of the DMMP. (C) 2009 Elsevier Ltd. All rights reserved.
C1 [Wahl, Jon H.; Colburn, Heather A.] Pacific NW Natl Lab, Chem & Biol Sci Grp, Richland, WA 99352 USA.
RP Wahl, JH (reprint author), Pacific NW Natl Lab, Chem & Biol Sci Grp, 902 Battelle Blvd,POB 999,MSIN P7-50, Richland, WA 99352 USA.
EM jon.wahl@pnl.gov
FU [AGRHSHQDC08X00571/B3]
FX Funding for this work was provided through contract AGRHSHQDC08X00571/B3
to Pacific Northwest National Laboratory by the Department of Homeland
Security, Science and Technology Directorate. The authors wish to thank
Carlos Fraga at Pacific Northwest National Laboratory for the use of the
DMMP samples and Dora Derzon and Theodore Borek at Sandia National
Laboratory for the preparation of the vapor deposited wallboard tickets.
NR 30
TC 3
Z9 3
U1 1
U2 7
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0360-1323
J9 BUILD ENVIRON
JI Build. Environ.
PD MAY
PY 2010
VL 45
IS 5
BP 1339
EP 1345
DI 10.1016/j.buildenv.2009.10.020
PG 7
WC Construction & Building Technology; Engineering, Environmental;
Engineering, Civil
SC Construction & Building Technology; Engineering
GA 559OS
UT WOS:000274835800024
ER
PT J
AU Albright, D
Brannan, P
Kelley, R
Stricker, AS
AF Albright, David
Brannan, Paul
Kelley, Robert
Stricker, Andrea Scheel
TI The North Korea-Myanmar relationship: A technical perspective
SO BULLETIN OF THE ATOMIC SCIENTISTS
LA English
DT Article
AB Although the evidence indicates that myanmar hasn't achieved a nuclear weapon capability, its ever-tightening connection to Pyongyang and ongoing interest in dualuse technology must be constrained.
C1 [Albright, David; Brannan, Paul; Stricker, Andrea Scheel] ISIS, Washington, DC USA.
[Kelley, Robert] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Albright, D (reprint author), ISIS, Washington, DC USA.
NR 12
TC 0
Z9 0
U1 1
U2 1
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 0096-3402
J9 B ATOM SCI
JI Bull. Atom. Scient.
PD MAY-JUN
PY 2010
VL 66
IS 3
BP 19
EP 29
DI 10.2968/066003003
PG 11
WC International Relations; Social Issues
SC International Relations; Social Issues
GA 624JS
UT WOS:000279815000003
ER
PT J
AU Ma, Z
Yin, HF
Dai, S
AF Ma, Zhen
Yin, Hongfeng
Dai, Sheng
TI Performance of Au/MxOy/TiO2 Catalysts in Water-Gas Shift Reaction
SO CATALYSIS LETTERS
LA English
DT Article
DE Gold catalysis; Nanoparticles; Titania; Metal oxide; Water-gas shift;
Promotion
ID PURE HYDROGEN-PRODUCTION; TEMPERATURE CO OXIDATION; GOLD-BASED
CATALYSTS; WGS REACTION; AU/CEO2 CATALYSTS; AU/FE2O3 CATALYSTS;
DEPOSITION-PRECIPITATION; AU/ALPHA-FE2O3 CATALYST; AU/TIO2 CATALYSTS;
AU-TIO2 CATALYSTS
AB Our group recently developed a series of Au/MxOy/TiO2 catalysts for CO oxidation, and demonstrated that some of these catalysts are still active after high-temperature treatment whereas Au/TiO2 deactivates significantly due to the sintering of gold nanoparticles at elevated temperatures (Ma Z, Overbury SH, Dai S ( 2007) J Mol Catal A 273:97). In the current work, the performance of Au/MxOy/TiO2 (M = Al, Ca, Fe, Zn, Ga, Y, Zr, La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Yb) catalysts in water-gas shift (WGS) reaction was evaluated. The influences of different metal oxide (MxOy) additives and pretreatment temperatures were investigated, and the catalyst stability as a function of reaction time on stream was tested. Some of these novel gold catalysts, with high activity and stability in water-gas shift, furnish new possibilities for further fundamental research and industrial development.
C1 [Ma, Zhen; Yin, Hongfeng; Dai, Sheng] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Dai, S (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM dais@ornl.gov
RI Ma, Zhen/F-1348-2010; Dai, Sheng/K-8411-2015
OI Ma, Zhen/0000-0002-2391-4943; Dai, Sheng/0000-0002-8046-3931
FU Division of Chemical Sciences, Office of Basic Energy Sciences, US
Department of Energy [DE-AC05-00OR22725]; Oak Ridge Associated
Universities
FX Research sponsored by the Division of Chemical Sciences, Office of Basic
Energy Sciences, US Department of Energy under contract
DE-AC05-00OR22725 with Oak Ridge National Laboratory, managed and
operated by UT-Battelle, LLC. This research was also supported by the
appointment for Z. Ma and H. F. Yin to the ORNL Research Associates
Program, administered by Oak Ridge Associated Universities.
NR 74
TC 20
Z9 20
U1 5
U2 43
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1011-372X
J9 CATAL LETT
JI Catal. Lett.
PD MAY
PY 2010
VL 136
IS 1-2
BP 83
EP 91
DI 10.1007/s10562-009-0201-y
PG 9
WC Chemistry, Physical
SC Chemistry
GA 586JK
UT WOS:000276903300013
ER
PT J
AU Chen, JY
Zhou, HJ
Santulli, AC
Wong, SS
AF Chen, Jingyi
Zhou, Hongjun
Santulli, Alexander C.
Wong, Stanislaus S.
TI Evaluating Cytotoxicity and Cellular Uptake from the Presence of
Variously Processed TiO2 Nanostructured Morphologies
SO CHEMICAL RESEARCH IN TOXICOLOGY
LA English
DT Article
ID TITANIUM-DIOXIDE NANOPARTICLES; EPITHELIAL-CELLS; IN-VITRO; FLUOROMETRIC
ANALYSIS; ULTRAFINE PARTICLES; PULMONARY TOXICITY; HYDROGEN-PEROXIDE;
SIZE; MICE; RATS
AB We evaluated the cytotoxicity of various morphological classes of TiO2 nanostructures (including 0-D nanoparticles, 1-D nanorods, and 3-D assemblies) toward living cells. These TiO2 nanostructures were modified with fluorescent dye molecules, mediated via a dopamine linkage, in order to facilitate a confocal study of their internalization. Specifically, we noted that both TiO2 1-D nanorods and 0-D nanoparticles could internalize into cells after 94 I Of incubation time. However, only incubation with TiO2 1-D nanorods and 3-D micrometer-scale sea urchin-like assemblies at concentrations of up to 125 mu g/mL yielded data suggestive of cell viabilities of close to 100%. Moreover, upon irradiation with UV light for periods of a few minutes at energy densities of up to 1 J/cm(2), we observed up to 60% mortality rates, indicative of the cytotoxic potential of photoirradiated TiO2 nanostructures due to the generation of reactive oxygen species.
C1 [Wong, Stanislaus S.] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
[Chen, Jingyi; Zhou, Hongjun; Santulli, Alexander C.; Wong, Stanislaus S.] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
RP Wong, SS (reprint author), Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Bldg 480, Upton, NY 11973 USA.
EM sswong@notes.cc.sunysb.edu
RI Zhou, Hongjun/A-1304-2011; Chen, Jingyi/E-7168-2010
OI Chen, Jingyi/0000-0003-0012-9640
FU National Science Foundation [DMR-0348239]; Alfred P. Sloan Foundation
[2006-2008]; Brookhaven National Laboratory [DE-AC02-98CH10886]
FX Synthesis work on TO, morphologies was performed at Brookhaven National
Laboratory under contract number DE-AC02-98CH10886. We also thank the
National Science Foundation (CAREER Award DMR-0348239) and the Alfred P.
Sloan Foundation (2006-2008) for PI support as well as for support of
the biological work and characterization studies. The authors also
acknowledge the technical service and advice provided by Susan Van Horn
for TEM and Guo-Wei Tian for CFM, performed at the Central Microscopy
Imaging Center at Stony Brook. They also thank Rebecca Rowehl for her
invaluable help with cell culture preparations at the Cell Culture and
Hybridoma facility at Stony Brook. Amanda L. Tiano and Fulya Dogan are
also thanked for their assistance with the BET measurements.
NR 48
TC 39
Z9 39
U1 1
U2 20
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0893-228X
J9 CHEM RES TOXICOL
JI Chem. Res. Toxicol.
PD MAY
PY 2010
VL 23
IS 5
BP 871
EP 879
DI 10.1021/tx900418b
PG 9
WC Chemistry, Medicinal; Chemistry, Multidisciplinary; Toxicology
SC Pharmacology & Pharmacy; Chemistry; Toxicology
GA 595FZ
UT WOS:000277597400008
PM 20408587
ER
PT J
AU Riley, RG
Szecsody, JE
SklarewA, DS
Mitroshkov, AV
Gent, PM
Brown, CF
Thompson, CJ
AF Riley, Robert G.
Szecsody, James E.
SklarewA, Debbie S.
Mitroshkov, Alex V.
Gent, Philip M.
Brown, Christopher F.
Thompson, Christopher J.
TI Desorption behavior of carbon tetrachloride and chloroform in
contaminated low organic carbon aquifer sediments
SO CHEMOSPHERE
LA English
DT Article
DE Carbon tetrachloride; Chloroform; Distribution coefficient; Desorption
resistant fraction; Slow release
ID SOLUTE TRANSPORT; SORPTION; TRICHLOROETHYLENE; GROUNDWATER; KINETICS;
SOILS; GEOSORBENTS; DIFFUSION; MINERALS
AB Slow release behavior of carbon tetrachloride (CCl(4)) and chloroform (CHCl(3)) in low organic carbon (<0.1%) deep aquifer sediments was quantified by 1-D column desorption studies with intact cores. The compounds had been in contact with the sediments for 30 years. Comparison of the CCl(4) distribution coefficient (K(d)) from this study with those from short contact time experiments suggested that CCl(4) K(d)'s calculated from site contaminated sediments of long contact time are likely a factor of 10 or more higher than those calculated from short contact-time lab experiments. A significant portion of the CHCl(3) mass (55% to more than 90%) was resistant to aqueous desorption in sediments with clay contents ranging from 2.0% to 36.7% and organic carbon content ranging from 0.017% to 0.088%. In contrast, CCl(4) showed greatest mass retention (31% or more) only in the highest clay and organic carbon content sediment. Relatively easy solvent extraction of the residual masses of CCl(4) and CHCl(3) from the sediments indicated the compounds were not permanently sequestered. Tracer breakthrough in columns was well behaved, indicating interparticle diffusion was not causing the slow release behavior. Diffusion out of intraparticle pores is suggested to be the main process governing the observed behavior although, diffusion out of natural organic matter cannot be ruled out as a potential contributing factor. The half-life for release of the slow fraction of CHCl(3) mass from sediments was estimated to be in the range of weeks (100 h) to months (1100 h). Neither CCl(4) or CHCl(3) were detected at measurable levels in the column effluent of one of the sediments even though a significant mass fraction of CHCl(3) was found present on the sediment following desorption suggesting that our estimate of hundreds to thousands of hours for complete release of CHCl(3) masses from such sediment is conservative. (C) 2010 Elsevier Ltd. All rights reserved.
C1 [Riley, Robert G.; Szecsody, James E.; SklarewA, Debbie S.; Mitroshkov, Alex V.; Brown, Christopher F.; Thompson, Christopher J.] Pacific NW Natl Lab, Richland, WA 99354 USA.
[Gent, Philip M.] CHPRC, Richland, WA 99352 USA.
RP Riley, RG (reprint author), Pacific NW Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA.
EM robert.riley@pnl.gov
FU US Department of Energy (DOE) [DE-AC06-76RLO 1830]; Fluor Hanford Inc.
FX This research was supported by the US Department of Energy (DOE) through
the Environmental Management Science Program (EMSP) and by Fluor Hanford
Inc. Pacific Northwest National Laboratory is operated for the DOE by
Battelle Memorial Institute under contract DE-AC06-76RLO 1830.
NR 30
TC 4
Z9 7
U1 2
U2 18
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0045-6535
J9 CHEMOSPHERE
JI Chemosphere
PD MAY
PY 2010
VL 79
IS 8
BP 807
EP 813
DI 10.1016/j.chemosphere.2010.03.005
PG 7
WC Environmental Sciences
SC Environmental Sciences & Ecology
GA 602IL
UT WOS:000278132600007
PM 20378146
ER
PT J
AU Boparai, HK
Comfort, SD
Satapanajaru, T
Szecsody, JE
Grossl, PR
Shea, PJ
AF Boparai, Hardiljeet K.
Comfort, Steve D.
Satapanajaru, Tunlawit
Szecsody, Jim E.
Grossl, Paul R.
Shea, Patrick J.
TI Abiotic transformation of high explosives by freshly precipitated iron
minerals in aqueous Fe-II solutions
SO CHEMOSPHERE
LA English
DT Article
DE RDX; HMX; TNT; Green rust; Magnetite; High explosives
ID PERMEABLE REACTIVE BARRIERS; CARBONATE GREEN RUST; SURFACE-BOUND FE(II);
ZEROVALENT IRON; REDUCTIVE DECHLORINATION; AQUIFER SEDIMENTS;
DEGRADATION; HEXAHYDRO-1,3,5-TRINITRO-1,3,5-TRIAZINE;
2,4,6-TRINITROTOLUENE; TETRACHLORIDE
AB Zerovalent iron barriers have become a viable treatment for field-scale cleanup of various ground water contaminants. While contact with the iron surface is important for contaminant destruction, the interstitial pore water within and near the iron barrier will be laden with aqueous, adsorbed and precipitated Fe-II phases. These freshly precipitated iron minerals could play an important role in transforming high explosives (HE). Our objective was to determine the transformation of RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine), HMX (octahydro-1,3,5,7-tetranitro-1,35,7-tetrazocine), and TNT (2,4,6-trinitrotoluene) by freshly precipitated iron Fe-II/Fe-III minerals. This was accomplished by quantifying the effects of initial Fe-II concentration, pH, and the presence of aquifer solids (Fe-III phases) on HE transformation rates. Results showed that at pH 8.2, freshly precipitated iron minerals transformed RDX, HMX, and TNT with reaction rates increasing with increasing Fe-II concentrations. RDX and HMX transformations in these solutions also increased with increasing pH (5.8-8.55). By contrast, TNT transformation was not influenced by pH (6.85-8.55) except at pH values <6.35. Transformations observed via LC/MS included a variety of nitroso products (RDX, HMX) and amino degradation products (TNT). XRD analysis identified green rust and magnetite as the dominant iron solid phases that precipitated from the aqueous Fe-II during HE treatment under anaerobic conditions. Geochemical modeling also predicted Fe-II activity would likely be controlled by green rust and magnetite. These results illustrate the important role freshly precipitated Fe-II/Fe-III minerals in aqueous Fe-II solutions play in the transformation of high explosives. (C) 2010 Elsevier Ltd. All rights reserved.
C1 [Boparai, Hardiljeet K.; Comfort, Steve D.; Shea, Patrick J.] Univ Nebraska, Sch Nat Resources, Lincoln, NE 68583 USA.
[Satapanajaru, Tunlawit] Kasetsart Univ, Dept Environm Sci, Bangkok 10900, Thailand.
[Szecsody, Jim E.] Pacific NW Natl Lab, Richland, WA 99354 USA.
[Grossl, Paul R.] Utah State Univ, Plant Soils & Climate Dept, Logan, UT 84322 USA.
[Shea, Patrick J.] Univ Nebraska, Med Ctr, Dept Environm Agr & Occupat Hlth, Omaha, NE 68198 USA.
RP Boparai, HK (reprint author), Univ Nebraska, Sch Nat Resources, Lincoln, NE 68583 USA.
EM hboparai@uwo.ca
RI Boparai, Hardiljeet /H-5544-2013;
OI Boparai, Hardiljeet /0000-0002-0068-337X; Satapanajaru,
Tunlawit/0000-0001-5922-033X
FU Strategic Environment Research and Development Program (SERDP)
[CU-1376]; University of Nebraska School of Natural Resources and Water
Sciences Laboratory
FX Funding was provided in part by a grant from the Strategic Environment
Research and Development Program (SERDP), project CU-1376. Partial
support was also provided by the University of Nebraska School of
Natural Resources and Water Sciences Laboratory. We are also thankful to
Dan Snow and David Cassada for assisting us with LC/MS analysis and
Kathryn Wally for XRD analysis. This paper is a contribution of
Agricultural Research Division Projects NEB-38-071 and 40-019.
NR 40
TC 9
Z9 9
U1 2
U2 28
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0045-6535
J9 CHEMOSPHERE
JI Chemosphere
PD MAY
PY 2010
VL 79
IS 8
BP 865
EP 872
DI 10.1016/j.chemosphere.2010.02.037
PG 8
WC Environmental Sciences
SC Environmental Sciences & Ecology
GA 602IL
UT WOS:000278132600015
PM 20226494
ER
PT J
AU Liu, ZC
Nassiri, A
Waldschmidt, G
AF Liu Zhen-Chao
Nassiri, A.
Waldschmidt, G.
TI Design and study of a high-current 5-cell superconducting rf cavity
SO CHINESE PHYSICS C
LA English
DT Article
DE high current; superconducting cavity; higher order modes
AB The Advanced Photon Source (APS) at Argonne National Laboratory is considering the development of a superconducting linac-based fourth-generation hard X-ray source to meet future scientific needs of the hard X-ray user community. This work specifically focuses on the design of an optimized 5-cell superconducting radio-frequency structure well suited for a high-energy, high-beam-current energy recovery linac. The cavity design parameters are based on the APS storage ring nominal 7 GeV and 100 mA beam operation. A high-current 5-cell cw superconducting cavity operating at 1.4 GHz has been designed. In order to achieve a high current, the accelerating cavity shape has been optimized and large end-cell beam pipes have been adopted. The beam break-up threshold of the cavity has been estimated using the code TDBBU, which predicts a high threshold beam current for a 7 GeV energy recovery linac model. A copper prototype cavity has been fabricated that uses half-cell modules, initially assembled by clamping the cells together.
C1 [Liu Zhen-Chao] Peking Univ, Sch Phys, Beijing 100871, Peoples R China.
[Liu Zhen-Chao; Nassiri, A.; Waldschmidt, G.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Liu, ZC (reprint author), Peking Univ, Sch Phys, Beijing 100871, Peoples R China.
FU U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences [DE-AC02-06CH11357]; China Scholarship Council
FX Supported by the U.S. Department of Energy, Office of Science, Office of
Basic Energy Sciences, (DE-AC02-06CH11357); Sponsored by China
Scholarship Council
NR 6
TC 0
Z9 0
U1 1
U2 1
PU CHINESE PHYSICAL SOC
PI BEIJING
PA P O BOX 603, BEIJING 100080, PEOPLES R CHINA
SN 1674-1137
J9 CHINESE PHYS C
JI Chin. Phys. C
PD MAY
PY 2010
VL 34
IS 5
BP 601
EP 603
PG 3
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 591IQ
UT WOS:000277294100018
ER
PT J
AU Zhu, JZ
Taylor, M
AF Zhu Jian-Zhou
Taylor, Mark
TI Intermittency and Thermalization in Turbulence
SO CHINESE PHYSICS LETTERS
LA English
DT Article
ID FLOWS
AB A dissipation rate, which grows faster than any power of the wave number in Fourier space, may be scaled to lead a hydrodynamic system to actually or potentially converge to its Galerkin truncation. Actual convergence here means the asymptotic truncation at a finite wavenumber k(G) above which modes have no dynamics; and, we define potential convergence for the truncation at k(G) which, however, grows without bound. Both types of convergence can be obtained with the dissipation rate mu[cosh(k/k(c)) - 1] that behaves as k(2) (newtonian) and exp{k/k(c)} for small and large k/k(c) respectively. Competing physics of cascade, thermalization and dissipation are discussed for numerical Navier-Stokes turbulence, emphasizing the intermittency growth issue.
C1 [Zhu Jian-Zhou] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Zhu Jian-Zhou] Los Alamos Natl Lab, CNLS, Los Alamos, NM 87545 USA.
[Taylor, Mark] Sandia Natl Labs, CCIM, Albuquerque, NM 87185 USA.
RP Zhu, JZ (reprint author), Los Alamos Natl Lab, Div Theoret, MS B258, Los Alamos, NM 87545 USA.
EM jzhu@pppl.gov; mt@mp3dev.org
FU CNLS; DOE
FX Supported by the CNLS LDRD program and the DOE ASCR Program in Applied
Mathematics Research.
NR 21
TC 2
Z9 2
U1 0
U2 4
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0256-307X
J9 CHINESE PHYS LETT
JI Chin. Phys. Lett.
PD MAY
PY 2010
VL 27
IS 5
AR 054702
DI 10.1088/0256-307X/27/5/054702
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 591ZS
UT WOS:000277344700043
ER
PT J
AU Rosenzweig, C
Wilbanks, TJ
AF Rosenzweig, Cynthia
Wilbanks, Thomas J.
TI The state of climate change vulnerability, impacts, and adaptation
research: strengthening knowledge base and community
SO CLIMATIC CHANGE
LA English
DT Article
C1 [Rosenzweig, Cynthia] NASA, Goddard Inst Space Studies, New York, NY 10025 USA.
[Wilbanks, Thomas J.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Rosenzweig, C (reprint author), NASA, Goddard Inst Space Studies, 2880 Broadway, New York, NY 10025 USA.
EM crosenzweig@giss.nasa.gov; wilbankstj@ornl.gov
NR 1
TC 28
Z9 29
U1 1
U2 20
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0165-0009
J9 CLIMATIC CHANGE
JI Clim. Change
PD MAY
PY 2010
VL 100
IS 1
BP 103
EP 106
DI 10.1007/s10584-010-9826-5
PG 4
WC Environmental Sciences; Meteorology & Atmospheric Sciences
SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
GA 599TR
UT WOS:000277936900013
ER
PT J
AU Rosenberg, NJ
AF Rosenberg, Norman J.
TI Climate change, agriculture, water resources: what do we tell those that
need to know?
SO CLIMATIC CHANGE
LA English
DT Article
ID INTRODUCTORY EDITORIAL; CHANGE IMPACTS; MODEL; MINK
C1 Pacific NW Natl Lab, Joint Global Change Res Inst, College Pk, MD 20740 USA.
RP Rosenberg, NJ (reprint author), Pacific NW Natl Lab, Joint Global Change Res Inst, College Pk, MD 20740 USA.
EM Normjrosenb@aol.com
NR 19
TC 5
Z9 6
U1 0
U2 11
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0165-0009
J9 CLIMATIC CHANGE
JI Clim. Change
PD MAY
PY 2010
VL 100
IS 1
BP 113
EP 117
DI 10.1007/s10584-010-9823-8
PG 5
WC Environmental Sciences; Meteorology & Atmospheric Sciences
SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
GA 599TR
UT WOS:000277936900015
ER
PT J
AU Carrington, DB
Wang, XL
Pepper, DW
AF Carrington, David B.
Wang, Xiuling
Pepper, Darrell W.
TI An H-Adaptive Finite Element Method for Turbulent Heat Transfer
SO CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES
LA English
DT Article
ID BACKWARD-FACING STEP; PARTICLE IMAGE VELOCIMETRY; DIFFUSION-PROBLEMS;
LAMINAR-FLOW; DOWNSTREAM; ADAPTATION; CONVECTION; MODELS
AB A two-equation turbulence closure model (k-omega) using an h-adaptive grid technique and finite element method (FEM) has been developed to simulate low Mach flow and heat transfer. These flows are applicable to many flows in engineering and environmental sciences. Of particular interest in the engineering modeling areas are: combustion, solidification, and heat exchanger design. Flows for indoor air quality modeling and atmospheric pollution transport are typical types of environmental flows modeled with this method. The numerical method is based on a hybrid finite element model using an equal-order projection process. The model includes thermal and species transport, localized mesh refinement (h-adaptive) and Petrov-Galerkin weighting for stabilizing advection.
This work develops the continuum model of a two-equation turbulence closure method. The fractional step solution method is stated along with the h-adaptive grid method (Carrington and Pepper, 2002). Solutions are presented for 2d flow over a backward-facing step.
C1 [Carrington, David B.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Pepper, Darrell W.] Univ Nevada, Las Vegas, NV 89154 USA.
RP Carrington, DB (reprint author), Los Alamos Natl Lab, T-3, Los Alamos, NM USA.
FU National Nuclear Security Administration of the U.S. Department of
Energy [DE-AC52-06NA25396]; Los Alamos National Laboratory
[LA-UR-09-7843]
FX Los Alamos National Laboratory, an affirmative action/equal opportunity
employer, is operated by the Los Alamos National Security, LLC for the
National Nuclear Security Administration of the U.S. Department of
Energy under contract DE-AC52-06NA25396. Los Alamos National Laboratory
strongly supports academic freedom and a researcher's right to publish;
as an institution, however, the Laboratory does not endorse the
viewpoint of a publication or guarantee its technical correctness.
Reference: LA-UR-09-7843.
NR 34
TC 4
Z9 4
U1 1
U2 1
PU TECH SCIENCE PRESS
PI NORCROSS
PA 6825 JIMMY CARTER BLVD, STE 1850, NORCROSS, GA 30071 USA
SN 1526-1492
EI 1526-1506
J9 CMES-COMP MODEL ENG
JI CMES-Comp. Model. Eng. Sci.
PD MAY
PY 2010
VL 61
IS 1
BP 23
EP 44
PG 22
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications
SC Engineering; Mathematics
GA 650WB
UT WOS:000281883400002
ER
PT J
AU Herbinet, O
Pitz, WJ
Westbrook, CK
AF Herbinet, Olivier
Pitz, William J.
Westbrook, Charles K.
TI Detailed chemical kinetic mechanism for the oxidation of biodiesel fuels
blend surrogate
SO COMBUSTION AND FLAME
LA English
DT Article
DE Methyl decanoate; Methyl decenoate; Surrogate; Oxidation; Biodiesel
fuels; Kinetic modeling; Engine; Low temperature
ID LOW-TEMPERATURE; METHYL BUTANOATE; DIESEL-ENGINES; DOUBLE-BOND;
GAS-PHASE; COMBUSTION; HYDROCARBONS; DECOMPOSITION; AUTOIGNITION;
CHEMISTRY
AB Detailed chemical kinetic mechanisms were developed and used to study the oxidation of two large unsaturated esters: methyl-5-decenoate and methyl-9-decenoate. These models were built from a previous methyl decanoate mechanism and were compared with rapeseed oil methyl esters oxidation experiments in a jet-stirred reactor. A comparative study of the reactivity of these three oxygenated compounds was performed and the differences in the distribution of the products of the reaction were highlighted showing the influence of the presence and the position of a double bond in the chain. Blend surrogates, containing methyl decanoate, methyl-5-decenoate, methyl-9-decenoate and n-alkanes, were tested against rapeseed oil methyl esters and methyl palmitate/n-decane experiments. These surrogate models are realistic kinetic tools allowing the study of the combustion of biodiesel fuels in diesel and homogeneous charge compression ignition engines. (C) 2009 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
C1 [Herbinet, Olivier; Pitz, William J.; Westbrook, Charles K.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Herbinet, Olivier] Nancy Univ, ENSIC, CNRS, Dept Chim Phys React,UMR 7630, F-54000 Nancy, France.
RP Pitz, WJ (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave,Mail Stop L-372, Livermore, CA 94550 USA.
EM pitz1@llnl.gov
RI herbinet, olivier/H-2571-2013;
OI herbinet, olivier/0000-0002-2155-098X
FU US Department of Energy [DE-AC52-07NA27344]
FX This work performed under the auspices of the US Department of Energy by
Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
We wish to thank Mr. Yu Zhang, Dr. Yi Yang, and Prof. Andre L. Boehman
for details on the engine experiments and for the experimental data in
tabular form.
NR 40
TC 144
Z9 146
U1 10
U2 60
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0010-2180
J9 COMBUST FLAME
JI Combust. Flame
PD MAY
PY 2010
VL 157
IS 5
BP 893
EP 908
DI 10.1016/j.combustflame.2009.10.013
PG 16
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA 570OM
UT WOS:000275687600006
ER
PT J
AU Kamm, JR
Shashkov, MJ
AF Kamm, James R.
Shashkov, Mikhail J.
TI A Pressure Relaxation Closure Model for One-Dimensional, Two-Material
Lagrangian Hydrodynamics Based on the Riemann Problem
SO COMMUNICATIONS IN COMPUTATIONAL PHYSICS
LA English
DT Article
DE Lagrangian hydrodynamics; compressible flow; multi-material flow;
pressure relaxation
ID EULERIAN COMPUTING METHOD; GODUNOV METHOD; FLOW SPEEDS; SCHEMES;
CONSERVATION; FORMULATION; ALGORITHMS; RESOLUTION; GASES
AB Despite decades of development, Lagrangian hydrodynamics of strength-free materials presents numerous open issues, even in one dimension. We focus on the problem of closing a system of equations for a two-material cell under the assumption of a single velocity model. There are several existing models and approaches, each possessing different levels of fidelity to the underlying physics and each exhibiting unique features in the computed solutions. We consider the case in which the change in heat in the constituent materials in the mixed cell is assumed equal. An instantaneous pressure equilibration model for a mixed cell can be cast as four equations in four unknowns, comprised of the updated values of the specific internal energy and the specific volume for each of the two materials in the mixed cell. The unique contribution of our approach is a physics-inspired, geometry-based model in which the updated values of the sub-cell, relaxing-toward-equilibrium constituent pressures are related to a local Riemann problem through an optimization principle. This approach couples the modeling problem of assigning sub-cell pressures to the physics associated with the local, dynamic evolution. We package our approach in the framework of a standard predictor-corrector time integration scheme. We evaluate our model using idealized, two material problems using either ideal-gas or stiffened-gas equations of state and compare these results to those computed with the method of Tipton and with corresponding pure-material calculations.
C1 [Kamm, James R.] Los Alamos Natl Lab, Div Appl Phys, Los Alamos, NM 87545 USA.
[Shashkov, Mikhail J.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Kamm, JR (reprint author), Los Alamos Natl Lab, Div Appl Phys, POB 1663, Los Alamos, NM 87545 USA.
EM jrkamm@sandia.gov; shashkov@lanl.gov
FU United States Department of Energy [DE-AC52-06NA25396]; US Department of
Energy Office of Science Advanced Scientific Computing Research (ASCR)
Program; US Department of Energy National Nuclear Security
Administration Advanced Simulation and Computing (ASC) Program
FX This work was performed under the auspices of the United States
Department of Energy by Los Alamos National Security, LLC, at Los Alamos
National Laboratory under contract DE-AC52-06NA25396. The authors
gratefully acknowledge the partial support of the US Department of
Energy Office of Science Advanced Scientific Computing Research (ASCR)
Program in Applied Mathematics Research and the partial support of the
US Department of Energy National Nuclear Security Administration
Advanced Simulation and Computing (ASC) Program. The authors thank A.
Barlow, Yu. Bondarenko, D. Burton, B. Despres, P.-H. Maire, L. Margolin,
W. Rider, and Yu. Yanilkin for numerous stimulating discussions on these
topics. The authors also thank the anonymous reviewers for many
insightful comments and helpful suggestions.
NR 33
TC 10
Z9 10
U1 0
U2 4
PU GLOBAL SCIENCE PRESS
PI WANCHAI
PA ROOM 3208, CENTRAL PLAZA, 18 HARBOUR RD, WANCHAI, HONG KONG 00000,
PEOPLES R CHINA
SN 1815-2406
J9 COMMUN COMPUT PHYS
JI Commun. Comput. Phys.
PD MAY
PY 2010
VL 7
IS 5
BP 927
EP 976
DI 10.4208/cicp.2009.09.032
PG 50
WC Physics, Mathematical
SC Physics
GA 598TX
UT WOS:000277862700003
ER
PT J
AU North, MJ
Macal, CM
St Aubin, J
Thimmapuram, P
Bragen, M
Hahn, J
Karr, J
Brigham, N
Lacy, ME
Hampton, D
AF North, Michael J.
Macal, Charles M.
St Aubin, James
Thimmapuram, Prakash
Bragen, Mark
Hahn, June
Karr, James
Brigham, Nancy
Lacy, Mark E.
Hampton, Delaine
TI Multiscale Agent-Based Consumer Market Modeling
SO COMPLEXITY
LA English
DT Article
DE consumer market modeling; multiscale modeling; agent-based modeling
AB Consumer markets have been studied in great depth, and many techniques have been used to represent them. These have included regression-based models, logit models, and theoretical market-level models, such as the NBD-Dirichlet approach. Although many important contributions and insights have resulted from studies that relied on these models, there is still a need for a model that could more holistically represent the interdependencies of the decisions made by consumers, retailers, and manufacturers. When the need is for a model that could be used repeatedly over time to support decisions in an industrial setting, it is particularly critical. Although some existing methods can, in principle, represent such complex interdependencies, their capabilities might be outstripped if they had to be used for industrial applications, because of the details this type of modeling requires. However a complementary method-agent-based modeling-shows promise for addressing these issues. Agent-based models use business-driven rules for individuals (e.g., individual consumer rules for buying items, individual retailer rides for stocking items, or individual firm rules for advertizing items) to determine holistic, system-level outcomes (e.g., to determine if brand X's market share is increasing). We applied agent-based modeling to develop a multi-scale consumer market model. We then conducted calibration, verification, and validation tests of this model. The model was successfully applied by Procter & Gamble to several challenging business problems. In these situations, it directly influenced managerial decision making and produced substantial cost savings. (C) 2010 Wiley Periodicals, Inc. Complexity 15: 37-47, 2010
C1 [North, Michael J.; Macal, Charles M.] Argonne Natl Lab, Ctr Complex Adapt Agent Syst Simulat, Argonne, IL 60439 USA.
[St Aubin, James; Bragen, Mark] Argonne Natl Lab, Modeling Simulat & Visualizat Grp, Argonne, IL 60439 USA.
[Thimmapuram, Prakash] Argonne Natl Lab, Ctr Energy Environm & Econ Syst Anal, Argonne, IL 60439 USA.
[Hahn, June; Karr, James; Brigham, Nancy; Lacy, Mark E.; Hampton, Delaine] Procter & Gamble Co, Cincinnati, OH 45202 USA.
RP North, MJ (reprint author), Argonne Natl Lab, Ctr Complex Adapt Agent Syst Simulat, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM north@anl.gov
NR 31
TC 19
Z9 19
U1 1
U2 14
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1076-2787
EI 1099-0526
J9 COMPLEXITY
JI Complexity
PD MAY-JUN
PY 2010
VL 15
IS 5
BP 37
EP 47
DI 10.1002/cplx.20304
PG 11
WC Mathematics, Interdisciplinary Applications; Multidisciplinary Sciences
SC Mathematics; Science & Technology - Other Topics
GA 594YE
UT WOS:000277576400005
ER
PT J
AU Zhang, XN
Zhao, QH
Wang, SQ
Trejo, R
Lara-Curzio, E
Du, GB
AF Zhang, Xinan
Zhao, Qiuhong
Wang, Siqun
Trejo, Rosa
Lara-Curzio, Edgar
Du, Guanben
TI Characterizing strength and fracture of wood cell wall through uniaxial
micro-compression test
SO COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
LA English
DT Article
DE Micro-compression; Wood; Micropillar; Strength; Cell wall
ID ATOMIC-FORCE MICROSCOPY; ELASTIC-MODULUS; MECHANICAL-PROPERTIES;
NANOINDENTATION MEASUREMENTS; ELECTRON-MICROSCOPY; SPRUCE WOOD;
HARDNESS; FIBERS; DAMAGE; GOLD
AB As the potential of using natural wood derivatives in the fabrication of composites is explored, it is important to gain further understanding of the structure and properties of wood cells. Past research has focused on estimating and measuring mechanical properties of wood cell walls such as hardness and modulus of elasticity by means of nano-indentation tests. However, to date, the mechanical properties of wood cell walls have not been fully understood or documented in the literature. The research described in this paper focuses, for the first time, on investigating the strength and fracture behavior of wood cell walls through an innovative approach, the uniaxial micro-compression test. Specimens of Keranji (Dialium ssp.), a dense Asian hardwood, and loblolly pine (Pious taeda), an American softwood, were chosen as hardwood and softwood representatives for the micro-compression test. After the initial preparation by microtoming, the samples were further prepared following a novel approach, in which 37 cylindrical-shaped micro-pillars were fabricated using a Focused Ion Beam (FIB) with a voltage of 30 kV, while each micropillar was milled inside a single wood cell wall. After the dimensions of each micropillar were measured by analysis of the SEM images using ImageJ software, a micro-compression test was conducted on the micropillar at a loading rate of 20 nm per second using a Nano II Indenter system. The load-displacement curves were plotted, and the yield stress and compressive strength obtained for the Keranji cell wall were 136.5 MPa and 160 MPa, respectively; the yield stress and compressive strength of the loblolly pine cell wall were 111.3 MPa and 125 MPa, respectively. The fracture behavior of the wood micropillars confirmed the brittleness of the wood cell walls. (C) 2010 Elsevier Ltd. All rights reserved.
C1 [Zhang, Xinan; Wang, Siqun] Univ Tennessee, Tennessee Forest Prod Ctr, Knoxville, TN 37996 USA.
[Zhao, Qiuhong] Univ Tennessee, Dept Civil & Environm Engn, Knoxville, TN 37996 USA.
[Trejo, Rosa; Lara-Curzio, Edgar] Oak Ridge Natl Lab, High Temp Mat Div, Oak Ridge, TN 37831 USA.
[Du, Guanben] SW Forestry Coll, Kunming, Peoples R China.
RP Wang, SQ (reprint author), Univ Tennessee, Tennessee Forest Prod Ctr, Knoxville, TN 37996 USA.
EM swang@utk.edu
RI zhao, qiuhong/D-3914-2012
FU National Research Initiative of the USDA Cooperative State Research,
Education and Extension Service [2005-02645]; USDA; Natural Science
Foundation of China [30928022]; US Department of Energy, Office of
Energy Efficiency and Renewable Energy
FX The project was funded by the National Research Initiative of the USDA
Cooperative State Research, Education and Extension Service, Grant
Number #2005-02645, USDA Wood Utilization Research Grant and partly
supported by the Natural Science Foundation of China #30928022. The
authors would like to thank the following people for their valuable
assistance during the study: Dr. Xing Cheng and Dr. John Dunlap at the
University of Tennessee, Knoxville for the training they provided to the
graduate students on using the microtoming and the SEM; Dorothy Coffey
at Oak Ridge National Laboratories for her assistance with the FIB
milling; and Laura Riester at Oak Ridge National Laboratories for their
assistance in the micro compression test. Research at the Oak Ridge
National Laboratory's High Temperature Materials Laboratory was
sponsored by the US Department of Energy, Office of Energy Efficiency
and Renewable Energy, Vehicle Technologies Program.
NR 40
TC 14
Z9 15
U1 3
U2 36
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1359-835X
J9 COMPOS PART A-APPL S
JI Compos. Pt. A-Appl. Sci. Manuf.
PD MAY
PY 2010
VL 41
IS 5
BP 632
EP 638
DI 10.1016/j.compositesa.2010.01.010
PG 7
WC Engineering, Manufacturing; Materials Science, Composites
SC Engineering; Materials Science
GA 580EP
UT WOS:000276430300007
ER
PT J
AU Vergniory, MG
Yang, C
Garcia-Lekue, A
Wang, LW
AF Vergniory, M. G.
Yang, C.
Garcia-Lekue, A.
Wang, Lin-Wang
TI Calculation of complex band structure for plane-wave nonlocal
pseudopotential Hamiltonian
SO COMPUTATIONAL MATERIALS SCIENCE
LA English
DT Article
DE Electronic band structure; Large system calculation
ID CONDUCTANCE; TRANSPORT
AB We present a practical approach to calculate the complex band structure of an electrode for quantum transport calculations. This method is designed for plane wave based Hamiltonian with nonlocal pseudopotentials, although it can be used for any Hamiltonian that has a large (>100,000) basis set. Our method is particularly useful for the auxiliary periodic boundary condition transport calculation. The complex band structures of copper and gold nanowires, and bulk gold electrodes are presented. The nanowire wave functions are analyzed using effective mass pictures. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Vergniory, M. G.; Yang, C.; Wang, Lin-Wang] Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA.
[Garcia-Lekue, A.] DIPC, Basque Country, Spain.
RP Vergniory, MG (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA.
EM maiagv@mail.com
RI DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014
FU US Department Of Energy BES/SC [DE-AC02-05CH11,231]; Gobierno Vasco
Postdoctoral Fellowship DK program
FX This work has been supported partially by the US Department Of Energy
BES/SC under Contract No. DE-AC02-05CH11,231 and the Gobierno Vasco
Postdoctoral Fellowship DK program. This research used the resource of
the National Energy Research Scientific Computing Center (NERSC).
NR 35
TC 4
Z9 4
U1 2
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0927-0256
J9 COMP MATER SCI
JI Comput. Mater. Sci.
PD MAY
PY 2010
VL 48
IS 3
BP 544
EP 550
DI 10.1016/j.commatsci.2010.02.021
PG 7
WC Materials Science, Multidisciplinary
SC Materials Science
GA 599SF
UT WOS:000277932700014
ER
PT J
AU Cai, WW
Kranendonk, L
Lee, T
Ma, L
AF Cai, Weiwei
Kranendonk, Laura
Lee, Tonghun
Ma, Lin
TI Characterization of composite nanoparticles using an improved light
scattering program for coated spheres
SO COMPUTER PHYSICS COMMUNICATIONS
LA English
DT Article
DE Composite nanoparticles; Mie scattering; Particle sizing; Scattering
matrix
ID MIE-SCATTERING; BESSEL-FUNCTIONS; ALGORITHMS; PARTICLES
AB The objectives of this paper are twofold. First, the paper developed an improved algorithm to perform light scattering calculations by coated spheres. The improved algorithm was implemented in FORTRAN90 as a subroutine to allow flexible application of the code. Second, the new program was applied to the characterization of composite aluminum nanoparticles. In this application, multiple elements of the Mueller scattering matrix were measured at multiple angles to infer the properties of the nanoparticles, including the size distribution function and the thickness of the coating. The new program played a key role in the fitting of the measured data, and this application demonstrated the advantages of the new program in situations that demand high efficiency and reliability.
C1 [Cai, Weiwei; Ma, Lin] Clemson Univ, Dept Mech Engn, Clemson, SC 29634 USA.
[Kranendonk, Laura] Oak Ridge Natl Lab, Fuels Engines & Emiss Res Ctr, Knoxville, TN 37932 USA.
[Lee, Tonghun] Michigan State Univ, Dept Mech Engn, E Lansing, MI 48824 USA.
RP Ma, L (reprint author), Clemson Univ, Dept Mech Engn, Room 233 Fluor Daniel Bldg, Clemson, SC 29634 USA.
EM LinMa@clemson.edu
RI Ma, Lin/A-9441-2012; Lee, Tonghun/A-5263-2014; cai, weiwei/Q-5932-2016;
OI cai, weiwei/0000-0003-3589-7500; De Cicco, Laura/0000-0002-3915-9487
NR 22
TC 8
Z9 8
U1 1
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0010-4655
J9 COMPUT PHYS COMMUN
JI Comput. Phys. Commun.
PD MAY
PY 2010
VL 181
IS 5
BP 978
EP 984
DI 10.1016/j.cpc.2010.01.010
PG 7
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 580EM
UT WOS:000276430000018
ER
PT J
AU Smirnov, RD
Pigarov, AY
Krasheninnikov, SI
Rognlien, TD
Soukhanovskii, VA
Rensink, ME
Maingi, R
Skinner, CH
Stotler, DP
Bell, RE
Kugel, HW
AF Smirnov, R. D.
Pigarov, A. Yu.
Krasheninnikov, S. I.
Rognlien, T. D.
Soukhanovskii, V. A.
Rensink, M. E.
Maingi, R.
Skinner, C. H.
Stotler, D. P.
Bell, R. E.
Kugel, H. W.
TI Multi-Fluid Modeling of Low-Recycling Divertor Regimes
SO CONTRIBUTIONS TO PLASMA PHYSICS
LA English
DT Article; Proceedings Paper
CT 12th International Workshop on Plasma Edge Theory in Fusion Devices
CY SEP 02-04, 2009
CL Rostov State Hist Museum, Rostov Veliky, RUSSIA
HO Rostov State Hist Museum
DE Edge plasma transport; divertor; recycling; UEDGE; liquid lithium
ID TOKAMAK
AB The low-recycling regimes of divertor operation in a single-null NSTX magnetic configuration are studied using computer simulations with the edge plasma transport code UEDGE. The edge plasma transport properties pertinent to the low-recycling regimes are demonstrated. These include the flux-limited character of the parallel heat transport and the high plasma temperatures with the flattened profiles in the scrape-off-layer. It is shown that to maintain the balance of particle fluxes at the core interface the deuterium gas puffing rate should increase as the divertor recycling coefficient decreases. The radial profiles of the heat load to the outer divertor plate, the upstream radial plasma profiles, and the effects of the cross-field plasma transport in the low-recycling regimes are discussed. It is also shown that recycling of lithium impurities evaporating from the divertor plate at high surface temperatures can reverse the low-recycling divertor operational regime to the high-recycling one and may cause thermal instability of the divertor plate. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
C1 [Smirnov, R. D.; Pigarov, A. Yu.; Krasheninnikov, S. I.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Rognlien, T. D.; Soukhanovskii, V. A.; Rensink, M. E.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Maingi, R.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Skinner, C. H.; Stotler, D. P.; Bell, R. E.; Kugel, H. W.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Smirnov, RD (reprint author), Univ Calif San Diego, La Jolla, CA 92093 USA.
EM rsmirnov@ucsd.edu
RI Smirnov, Roman/B-9916-2011; Stotler, Daren/J-9494-2015
OI Smirnov, Roman/0000-0002-9114-5330; Stotler, Daren/0000-0001-5521-8718
NR 11
TC 7
Z9 7
U1 0
U2 4
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0863-1042
J9 CONTRIB PLASM PHYS
JI Contrib. Plasma Phys.
PD MAY
PY 2010
VL 50
IS 3-5
SI SI
BP 299
EP 305
DI 10.1002/ctpp.201010049
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 606PI
UT WOS:000278438900013
ER
PT J
AU Umansky, MV
Rognlien, TD
Ryutov, DD
Snyder, PB
AF Umansky, M. V.
Rognlien, T. D.
Ryutov, D. D.
Snyder, P. B.
TI Edge Plasma in Snowflake Divertor
SO CONTRIBUTIONS TO PLASMA PHYSICS
LA English
DT Article; Proceedings Paper
CT 12th International Workshop on Plasma Edge Theory in Fusion Devices
CY SEP 02-04, 2009
CL Rostov State Hist Museum, Rostov Veliky, RUSSIA
HO Rostov State Hist Museum
DE Tokamak; plasma divertor
ID STABILITY
AB The snowflake divertor (Ryutov 2007, Phys. Plasmas 14, 064502) uses a 2nd order null of the poloidal magnetic field instead of the 1st order null used in the standard divertor. This leads to a number of interesting geometric properties such as stronger fanning of the poloidal flux, stronger magnetic shear in the edge region, larger radiating volume, and larger connection length in the scrape-off layer. These can potentially lead to new ways for alleviating heat loads on the divertor target plates. Discussion of properties of snowflake is presented, along with results of numerical modeling. Divertor leg volume is larger in snowflake than in the standard x-point configuration, which leads to larger fraction of radiated power in the divertor. This allows the snowflake to transition to a strongly detached plasma regime more easily than for the standard x-point. Besides, stronger shearing of the magnetic field in snowflake may be beneficial for controlling magneto-hydrodynamic instabilities in the edge. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
C1 [Umansky, M. V.; Rognlien, T. D.; Ryutov, D. D.] LLNL, Livermore, CA 94550 USA.
[Snyder, P. B.] Gen Atom Co, San Diego, CA 92121 USA.
RP Umansky, MV (reprint author), LLNL, Livermore, CA 94550 USA.
EM umansky1@llnl.gov
NR 13
TC 15
Z9 15
U1 0
U2 1
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0863-1042
J9 CONTRIB PLASM PHYS
JI Contrib. Plasma Phys.
PD MAY
PY 2010
VL 50
IS 3-5
SI SI
BP 350
EP 355
DI 10.1002/ctpp.201010057
PG 6
WC Physics, Fluids & Plasmas
SC Physics
GA 606PI
UT WOS:000278438900021
ER
PT J
AU Stotler, DP
Maingi, R
Zakharov, LE
Kugel, HW
Pigarov, AY
Rognlien, TD
Soukhanovskii, VA
AF Stotler, D. P.
Maingi, R.
Zakharov, L. E.
Kugel, H. W.
Pigarov, A. Yu.
Rognlien, T. D.
Soukhanovskii, V. A.
TI Simulations of NSTX with a Liquid Lithium Divertor Module
SO CONTRIBUTIONS TO PLASMA PHYSICS
LA English
DT Article; Proceedings Paper
CT 12th International Workshop on Plasma Edge Theory in Fusion Devices
CY SEP 02-04, 2009
CL Rostov State Hist Museum, Rostov Veliky, RUSSIA
HO Rostov State Hist Museum
DE NSTX; lithium; UEDGE; recycling
ID SPHERICAL TORUS EXPERIMENT; PARALLEL PLASMA FLOWS; SCRAPE-OFF LAYER;
TOKAMAK
AB A strategy to develop self-consistent simulations of the behavior of lithium in the Liquid Lithium Divertor (LLD) module to be installed in NSTX is described. In this initial stage of the plan, the UEDGE edge plasma transport code is used to simulate an existing NSTX shot, with UEDGE's transport coefficients set using midplane and divertor diagnostic data. The LLD is incorporated into the simulations as a reduction in the recycling coefficient over the outer divertor. Heat transfer calculations performed using the resulting heat flux profiles provide preliminary estimates on operating limits for the LLD as well as input data for subsequent steps in the LLD modeling effort. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
C1 [Stotler, D. P.; Zakharov, L. E.; Kugel, H. W.] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Maingi, R.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Pigarov, A. Yu.] Univ Calif San Diego, San Diego, CA 92103 USA.
[Rognlien, T. D.; Soukhanovskii, V. A.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Stotler, DP (reprint author), Princeton Univ, Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM dstotler@pppl.gov
RI Stotler, Daren/J-9494-2015
OI Stotler, Daren/0000-0001-5521-8718
NR 15
TC 6
Z9 6
U1 1
U2 4
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 0863-1042
J9 CONTRIB PLASM PHYS
JI Contrib. Plasma Phys.
PD MAY
PY 2010
VL 50
IS 3-5
SI SI
BP 368
EP 373
DI 10.1002/ctpp.201010060
PG 6
WC Physics, Fluids & Plasmas
SC Physics
GA 606PI
UT WOS:000278438900024
ER
PT J
AU Wang, PM
Wilson, LL
Wesolowski, DJ
Rosenqvist, J
Anderko, A
AF Wang, Peiming
Wilson, Leslie L.
Wesolowski, David J.
Rosenqvist, Joergen
Anderko, Andrzej
TI Solution chemistry of Mo(III) and Mo(IV): Thermodynamic foundation for
modeling localized corrosion
SO CORROSION SCIENCE
LA English
DT Article
DE Modeling studies; Electrochemical calculation; Thermodynamic diagrams
ID SOLVENT ELECTROLYTE SYSTEMS; PARTIAL MOLAL PROPERTIES; HIGH-PRESSURES;
TRANSPORT-PROPERTIES; PHASE-EQUILIBRIA; AQUEOUS IONS; TEMPERATURES;
MOLYBDENUM; SPECIATION; DISSOLUTION
AB To investigate the behavior of molybdenum dissolution products in systems that approximate localized corrosion environments, solubility of Mo(III) in equilibrium with solid MoO(2) has been determined at 80 degrees C as a function of solution acidity, chloride concentration and partial pressure of hydrogen. The measurements indicate a strong increase in solubility with acidity and chloride concentration and a weak effect of hydrogen partial pressure. The obtained results have been combined with literature data for systems containing Mo(III), Mo(IV), and Mo(VI) in solutions to develop a comprehensive thermodynamic model of aqueous molybdenum chemistry. The model is based on a previously developed framework for simulating the properties of electrolyte systems ranging from infinite dilution to solid saturation or fused salt limit. To reproduce the measurements, the model assumes the presence of a chloride complex of Mo(III) (i.e., MoCl(2+) and hydrolyzed species (MoOH(2+). Mo(OH)(2)(+), and Mo(OH)(3)(0)) in addition to the Mo(3+) ion. The model generally reproduces the experimental data within experimental scattering and provides a tool for predicting the phase behavior and speciation in complex, concentrated aqueous solutions. Thus, it provides a foundation for simulating the behavior of molybdenum species in localized corrosion environments. (C) 2010 Elsevier Ltd. All rights reserved.
C1 [Wang, Peiming; Anderko, Andrzej] OLI Syst Inc, Morris Plains, NJ 07950 USA.
[Wilson, Leslie L.; Wesolowski, David J.; Rosenqvist, Joergen] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Anderko, A (reprint author), OLI Syst Inc, 108 Amer Rd, Morris Plains, NJ 07950 USA.
EM aanderko@olisystems.com
RI Wilson, Leslie/N-1295-2016;
OI Wilson, Leslie/0000-0001-7103-6092; Anderko, Andrzej/0000-0002-1522-4889
FU Office of Science and Technology and International (OSTI); Office of
Civilian Radioactive Waste Management (OCRWM); US Department of Energy
(DOE) [DE-AC05-00OR22725]
FX The financial support of this work from the Science & Technology Program
of the Office of Science and Technology and International (OST&I),
Office of Civilian Radioactive Waste Management (OCRWM), US Department
of Energy (DOE) is gratefully acknowledged. The experimental work was
conducted by LLW, DJW, and JR at Oak Ridge National Laboratory, which is
managed and operated by UT Battelle, LLC, under contract
DE-AC05-00OR22725 for the US Department of Energy. The interactions
among investigators in the OST&I Materials Performance Thrust are
appreciated and gratefully acknowledged.
NR 34
TC 5
Z9 5
U1 1
U2 7
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0010-938X
J9 CORROS SCI
JI Corrosion Sci.
PD MAY
PY 2010
VL 52
IS 5
BP 1625
EP 1634
DI 10.1016/j.corsci.2010.01.032
PG 10
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 590KK
UT WOS:000277224400012
ER
PT J
AU Oh, H
Thomas, RJ
AF Oh, HyungSeon
Thomas, Robert J.
TI Nonlinear time series analysis on the offer behaviors observed in an
electricity market
SO DECISION SUPPORT SYSTEMS
LA English
DT Article
DE Hurst exponent; Nonlinear dynamics; Chaos; Offer behavior; Locational
marginal price (LMP)
AB In electricity markets where supply and demand drives the price for the purchase and sale of electricity, generating firms change capacity for various reasons including load level, policy, and varying market conditions. These types of fluctuating production patterns can result in the reduction of market efficiency. In an inefficient market, where the price for electricity exceeds marginal cost, the locational marginal price (LMP) is often used to measure market efficiency. Stochastically driven changes in the market are captured by this approach, however, these random changes (frequently observed in efficient markets as well) do not affect market efficiency in the long run. Conversely, a slow, consistent change is not captured by the snapshot approach and affects the efficiency significantly. Therefore, it is necessary to construct an algorithm that captures only consistent changes that truly affect market efficiency. Fractal analysis can characterize a price behavior in the electricity markets because the price exhibits a self-similarity.(1) Once a system undergoes a change, the fractal dimension of the system reflects the change. In this paper, an approach using nonlinear time series analysis is proposed and tested on actual offer behavior observed in the electricity markets in the United States. (C) 2010 Published by Elsevier B.V.
C1 [Oh, HyungSeon] Natl Renewable Energy Lab, Strateg Energy Anal Ctr, Golden, CO 80401 USA.
[Thomas, Robert J.] Cornell Univ, Sch Elect & Comp Engn, Ithaca, NY 14853 USA.
RP Oh, H (reprint author), Natl Renewable Energy Lab, Strateg Energy Anal Ctr, Golden, CO 80401 USA.
EM hyungseon.oh@nrel.gov
NR 26
TC 3
Z9 3
U1 0
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-9236
J9 DECIS SUPPORT SYST
JI Decis. Support Syst.
PD MAY
PY 2010
VL 49
IS 2
BP 132
EP 137
DI 10.1016/j.dss.2010.01.008
PG 6
WC Computer Science, Artificial Intelligence; Computer Science, Information
Systems; Operations Research & Management Science
SC Computer Science; Operations Research & Management Science
GA 603FN
UT WOS:000278194200002
ER
PT J
AU Kumar, RS
Dandekar, D
Leithe-Jasper, A
Tanaka, T
Xiao, YM
Chow, P
Nicol, MF
Cornelius, AL
AF Kumar, Ravhi S.
Dandekar, Dattatraya
Leithe-Jasper, Andres
Tanaka, Takaho
Xiao, Yuming
Chow, Paul
Nicol, Malcolm F.
Cornelius, Andrew L.
TI Inelastic X-ray scattering experiments on B4C under high static
pressures
SO DIAMOND AND RELATED MATERIALS
LA English
DT Article; Proceedings Paper
CT 20th European Conference on Diamond, Diamond-Like Materials, Carbon
Nanotubes and Nitrides
CY SEP 06-10, 2009
CL Athens, GREECE
DE B4C; High pressure; Inelastic x-ray scattering
ID BORON-CARBIDE; RAMAN-SCATTERING; CARBON NANOTUBES
AB Boron K-edge inelastic X-ray scattering experiments were performed on clean B4C and shock impact recovered boron carbide up to 30 GPa and at ambient temperature to understand the pressure induced bonding changes. The spectral features corresponding to the boron site in the interlinking chain remained unchanged up to 30 GPa. The results of our experiments indicate that pressure induces less distortion to the boron sites and the local amorphization observed in the previous reports are due to the rearrangement of carbon atoms under extreme conditions without affecting the boron environment. Published by Elsevier B.V.
C1 [Kumar, Ravhi S.; Nicol, Malcolm F.; Cornelius, Andrew L.] Univ Nevada, HiPSEC, Las Vegas, NV 89154 USA.
[Kumar, Ravhi S.; Nicol, Malcolm F.; Cornelius, Andrew L.] Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA.
[Leithe-Jasper, Andres] Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany.
[Tanaka, Takaho] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan.
[Xiao, Yuming; Chow, Paul] Argonne Natl Lab, Adv Photon Source, Carnegie Inst Washington, Argonne, IL 60439 USA.
[Xiao, Yuming; Chow, Paul] Argonne Natl Lab, HPCAT, Argonne, IL 60439 USA.
RP Kumar, RS (reprint author), Univ Nevada, HiPSEC, 4505 Maryland Pk Way, Las Vegas, NV 89154 USA.
EM ravhi@physics.unlv.edu
RI Cornelius, Andrew/A-9837-2008; Kumar, Ravhi/B-8427-2012; Leithe-Jasper,
Andreas/O-9303-2014;
OI Kumar, Ravhi/0000-0002-1967-1619
NR 28
TC 5
Z9 5
U1 0
U2 15
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-9635
J9 DIAM RELAT MATER
JI Diam. Relat. Mat.
PD MAY-JUN
PY 2010
VL 19
IS 5-6
SI SI
BP 530
EP 532
DI 10.1016/j.diamond.2010.01.009
PG 3
WC Materials Science, Multidisciplinary
SC Materials Science
GA 603FH
UT WOS:000278193600038
ER
PT J
AU Biener, MM
Biener, J
Kucheyev, SO
Wang, YM
El-Dasher, B
Teslich, NE
Hamza, AV
Obloh, H
Mueller-Sebert, W
Wolfer, M
Fuchs, T
Grimm, M
Kriele, A
Wild, C
AF Biener, M. M.
Biener, J.
Kucheyev, S. O.
Wang, Y. M.
El-Dasher, B.
Teslich, N. E.
Hamza, A. V.
Obloh, H.
Mueller-Sebert, W.
Wolfer, M.
Fuchs, T.
Grimm, M.
Kriele, A.
Wild, C.
TI Controlled incorporation of mid-to-high Z transition metals in CVD
diamond
SO DIAMOND AND RELATED MATERIALS
LA English
DT Article; Proceedings Paper
CT 20th European Conference on Diamond, Diamond-Like Materials, Carbon
Nanotubes and Nitrides
CY SEP 06-10, 2009
CL Athens, GREECE
DE Diamond; Chemical vapor deposition; Plasma CVD; Defect characterization;
Doping; Inertial confinement fusion
ID RAMAN-SPECTRA; FILMS; BORON; POLYCRYSTALLINE; SPECTROSCOPY; DEPOSITION;
NITROGEN; NANOCRYSTALLINE; CONTAMINATION; TEMPERATURE
AB We report on a general method to fabricate transition metal related defects in diamond. Controlled incorporation of Mo and W in synthetic CVD diamond was achieved by adding volatile metal precursors to the diamond chemical vapor deposition (CVD) growth process. Effects of deposition temperature, grain structure and precursor exposure on the incorporation efficiency were systematically studied, and doping levels of up to 0.25 at.% have been achieved. The metal atoms are uniformly distributed throughout the diamond grains without any indication of inclusion formation. These results are discussed in context of the kinetically controlled growth process of CVD diamond. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Biener, M. M.; Biener, J.; Kucheyev, S. O.; Wang, Y. M.; El-Dasher, B.; Teslich, N. E.; Hamza, A. V.] Lawrence Livermore Natl Lab, Nanoscale Synth & Characterizat Lab, Livermore, CA 94550 USA.
[Obloh, H.; Mueller-Sebert, W.; Wolfer, M.; Fuchs, T.; Grimm, M.; Kriele, A.; Wild, C.] Fraunhofer Inst Appl Solid State Phys, D-79108 Freiburg, Germany.
RP Biener, J (reprint author), Lawrence Livermore Natl Lab, Nanoscale Synth & Characterizat Lab, Livermore, CA 94550 USA.
EM biener2@llnl.gov
RI Wang, Yinmin (Morris)/F-2249-2010
OI Wang, Yinmin (Morris)/0000-0002-7161-2034
NR 35
TC 3
Z9 3
U1 0
U2 8
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-9635
J9 DIAM RELAT MATER
JI Diam. Relat. Mat.
PD MAY-JUN
PY 2010
VL 19
IS 5-6
SI SI
BP 643
EP 647
DI 10.1016/j.diamond.2010.02.017
PG 5
WC Materials Science, Multidisciplinary
SC Materials Science
GA 603FH
UT WOS:000278193600062
ER
PT J
AU Shao, YY
Wang, J
Wu, H
Liu, J
Aksay, IA
Lin, YH
AF Shao, Yuyan
Wang, Jun
Wu, Hong
Liu, Jun
Aksay, Ilhan A.
Lin, Yuehe
TI Graphene Based Electrochemical Sensors and Biosensors: A Review
SO ELECTROANALYSIS
LA English
DT Review
DE Graphene; Carbon nanotubes; Direct electrochemistry; Enzyme; Biosensors;
Glucose; DNA
ID DIRECT ELECTRON-TRANSFER; CHEMICAL-VAPOR-DEPOSITION; NANOTUBE-MODIFIED
ELECTRODES; EXFOLIATED GRAPHITE OXIDE; LIQUID-PHASE EXFOLIATION;
SINGLE-LAYER GRAPHENE; PEM FUEL-CELLS; CARBON NANOTUBES;
GLUCOSE-OXIDASE; EPITAXIAL GRAPHENE
AB Graphene, emerging as a true 2-dimensional material, has received increasing attention due to its unique physicochemical properties (high surface area, excellent conductivity, high mechanical strength, and ease of functionalization and mass production). This article selectively reviews recent advances in graphene-based electrochemical sensors and biosensors. In particular, graphene for direct electrochemistry of enzyme, its electrocatalytic activity toward small biomolecules (hydrogen peroxide, NADH, dopamine, etc.), and graphene-based enzyme biosensors have been summarized in more detail; Graphene-based DNA sensing and environmental analysis have been discussed. Future perspectives in this rapidly developing field are also discussed.
C1 [Shao, Yuyan; Wang, Jun; Wu, Hong; Liu, Jun; Lin, Yuehe] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Aksay, Ilhan A.] Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA.
RP Lin, YH (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM Yuehe.lin@pnl.gov
RI Aksay, Ilhan/B-9281-2008; Shao, Yuyan/A-9911-2008; Lin,
Yuehe/D-9762-2011
OI Shao, Yuyan/0000-0001-5735-2670; Lin, Yuehe/0000-0003-3791-7587
FU PNNL; National Institutes of Health through National Institute of
Neurological Disorders and Stroke, NIH [U01 NS058161-01]; U.S.
Department of Energy (DOE); DOE [DE-AC05-76RL01830]; ARO/MURI
[W911NF-09-1-0476]
FX The work done at Pacific Northwest National Laboratory (PNNL) was
supported partially by a laboratory-directed research and development
program (LDRD) at PNNL and partially by Grant Number U01 NS058161-01
from the National Institutes of Health CounterACT Program through the
National Institute of Neurological Disorders and Stroke, NIH. The work
was partly performed at the Environmental Molecular Sciences Laboratory,
a national scientific user facility sponsored by the U.S. Department of
Energy (DOE) and located at PNNL. PNNL is operated by Battelle for DOE
under Contract DE-AC05-76RL01830. IAA acknowledges support from ARO/MURI
under Grant Number W911NF-09-1-0476.
NR 136
TC 1293
Z9 1316
U1 277
U2 2139
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 1040-0397
J9 ELECTROANAL
JI Electroanalysis
PD MAY
PY 2010
VL 22
IS 10
BP 1027
EP 1036
DI 10.1002/elan.200900571
PG 10
WC Chemistry, Analytical; Electrochemistry
SC Chemistry; Electrochemistry
GA 606LG
UT WOS:000278425900001
ER
PT J
AU Hirayama, M
Yonemura, M
Suzuki, K
Torikai, N
Smith, H
Watkinsand, E
Majewski, J
Kanno, R
AF Hirayama, Masaaki
Yonemura, Masao
Suzuki, Kouta
Torikai, Naoya
Smith, Hillary
Watkinsand, Erik
Majewski, Jarek
Kanno, Ryoji
TI Surface Characterization of LiFePO4 Epitaxial Thin Films by
X-ray/Neutron Reflectometry
SO ELECTROCHEMISTRY
LA English
DT Article; Proceedings Paper
CT 50th Battery Symposium in Japan
CY NOV 30-DEC 02, 2009
CL Kyoto, JAPAN
SP Electrochem Soc Japan, Comm Battery Technol
DE Lithium Batteries; Interfacial Structure; in situ Observation; Neutron
Scattering
ID LITHIUM-ION BATTERIES; ELECTRODE/ELECTROLYTE INTERFACE; RAY
REFLECTOMETRY; ELECTRODE; LINI0.8CO0.2O2; INTERCALATION; LI-7
AB The electrode surface of a lithium battery was characterized using in situ reflectivity techniques and epitaxial thin films. Epitaxial LiFePO4 thin films were fabricated by pulsed laser deposition. Changes in interfacial structures on the surface are determined by X-ray and neutron reflectivity (NR) measurements using an X-ray-transmission electrochemical cell. The LiFePO4 surface is stable during the first charge/discharge process. NR analysis indicates a reversible change in the concentration gradient of lithium ions at the LiFePO4/electrolyte interface on lithium deintercalation.
C1 [Hirayama, Masaaki; Suzuki, Kouta; Kanno, Ryoji] Tokyo Inst Technol, Dept Elect Chem, Interdisciplinary Grad Sch Sci & Engn, Midori Ku, Yokohama, Kanagawa 2268502, Japan.
[Yonemura, Masao] Ibaraki Univ, Grad Sch Sci & Engn, Inst Appl Beam Sci, Hitachi, Ibaraki 3168511, Japan.
[Torikai, Naoya] Mie Univ, Fac Engn, Dept Chem Mat, Tsu, Mie 5148507, Japan.
[Torikai, Naoya] Mie Univ, Grad Sch Engn, Tsu, Mie 5148507, Japan.
[Smith, Hillary; Watkinsand, Erik; Majewski, Jarek] Los Alamos Natl Lab, Manuel Lujan Jr Neutron Scattering Ctr, Los Alamos, NM 87545 USA.
RP Hirayama, M (reprint author), Tokyo Inst Technol, Dept Elect Chem, Interdisciplinary Grad Sch Sci & Engn, Midori Ku, 4259 Nagatsuta, Yokohama, Kanagawa 2268502, Japan.
RI Hirayama, Masaaki/B-5781-2011; Lujan Center, LANL/G-4896-2012
OI Hirayama, Masaaki/0000-0003-4804-4208;
NR 13
TC 20
Z9 20
U1 3
U2 43
PU ELECTROCHEMICAL SOC JAPAN
PI TOKYO
PA ARUSUICHIGAYA202, 4-8-30, KUDANMINAMI, CHIYODA-KU, TOKYO, 102-0074,
JAPAN
SN 1344-3542
J9 ELECTROCHEMISTRY
JI Electrochemistry
PD MAY
PY 2010
VL 78
IS 5
BP 413
EP 415
PG 3
WC Electrochemistry
SC Electrochemistry
GA 595EP
UT WOS:000277593800029
ER
PT J
AU Liu, XB
Hong, TZ
AF Liu, Xiaobing
Hong, Tianzhen
TI Comparison of energy efficiency between variable refrigerant flow
systems and ground source heat pump systems
SO ENERGY AND BUILDINGS
LA English
DT Article
DE Building simulation; DOE-2; Energy efficiency; GSHP; VRF
ID AIR-CONDITIONING SYSTEM; COOLING CONDITIONS; SIMULATION
AB With the current movement towards net zero energy buildings, many technologies are promoted with emphasis on their superior energy efficiency. The variable refrigerant flow (VRF) and ground source heat pump (GSHP) systems are probably the most competitive technologies among these. However, there are few studies reporting the energy efficiency of VRF systems compared with GSHP systems. In this article, a preliminary comparison of energy efficiency between the air-source VRF and GSHP systems is presented. The computer simulation results show that GSHP system is more energy efficient than the air-source VRF system for conditioning a small office building in two selected US climates. In general, GSHP system is more energy efficient than the air-source VRV system, especially when the building has significant heating loads. For buildings with less heating loads, the GSHP system could still perform better than the air-source VRF system in terms of energy efficiency, but the resulting energy savings may be marginal. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Hong, Tianzhen] Univ Calif Berkeley, Lawrence Berkeley Lab, EETD, Berkeley, CA 94720 USA.
[Liu, Xiaobing] Climatemaster, Oklahoma City, OK 73179 USA.
RP Hong, TZ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, EETD, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM thong@lbl.gov
RI Hong, Tianzhen/D-3256-2013
NR 13
TC 34
Z9 35
U1 2
U2 20
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0378-7788
J9 ENERG BUILDINGS
JI Energy Build.
PD MAY
PY 2010
VL 42
IS 5
BP 584
EP 589
DI 10.1016/j.enbuild.2009.10.028
PG 6
WC Construction & Building Technology; Energy & Fuels; Engineering, Civil
SC Construction & Building Technology; Energy & Fuels; Engineering
GA 586EO
UT WOS:000276885600004
ER
PT J
AU Beste, A
Buchanan, AC
AF Beste, Ariana
Buchanan, A. C., III
TI Substituent Effects on the Reaction Rates of Hydrogen Abstraction in the
Pyrolysis of Phenethyl Phenyl Ethers
SO ENERGY & FUELS
LA English
DT Article
ID TRANSITION-STATE THEORY; LIGNIN MODEL COMPOUNDS; AB-INITIO;
ALPHA/BETA-SELECTIVITIES; COMPUTATIONAL PREDICTION; DENSITY; CHEMISTRY;
HYDROXYL; ATOM
AB We report reaction profiles and forward rate constants for hydrogen abstraction reactions occurring in the pyrolysis of methoxy-substituted derivatives of phenethyl phenyl ether (PhCH2CH2OPh, PPE), where the substituents are located on the aryl ether ring (PhCH2CH2OPh-X). We use density functional theory in combination with transition-state theory, and anharmonic corrections are included within the independent mode approximation. PPE is the simplest model of the abundant beta-O-4 linkage in lignin. The mechanism of PPE pyrolysis and overall product selectivities have been studied experimentally by one of us, which was followed by computational analysis of key individual hydrogen-transfer reaction steps. In the previous work, we have been able to use a simplified kinetic model based on quasi-steady-state conditions to reproduce experimental alpha/beta selectivities for PPE and PPEs with substituents on the phenethyl ring (X-PhCH2CH2OPh). This model is not applicable to PPE derivatives where methoxy substituents are located on the phenyl ring adjacent to the ether oxygen because of the strongly endothermic character of the hydrogen abstraction by substituted phenoxy radicals as well as the decreased kinetic chain lengths resulting from enhanced rates of the initial C-O homolysis step. Substituents decelerate the hydrogen abstraction by the phenoxy radical, while the influence on the benzyl abstraction is less homogeneous. The calculations provide insight into the contributions of steric and polar effects in these important hydrogen-transfer steps. We emphasize the importance of an exhaustive conformational space search to calculate rate constants and product selectivities. The computed rate constants will be used in future work to numerically simulate the pyrolysis mechanism, pending the calculation of the rate constants of all participating reactions.
C1 [Beste, Ariana] Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA.
[Buchanan, A. C., III] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Beste, A (reprint author), Oak Ridge Natl Lab, Comp Sci & Math Div, POB 2008,MS 6367, Oak Ridge, TN 37831 USA.
EM bestea@ornl.gov
OI Beste, Ariana/0000-0001-9132-792X
FU Division of Chemical Sciences, Geosciences, and Biosciences, Office of
Basic Energy Sciences, U.S. Department of Energy; Center for
Computational Sciences at Oak Ridge National Laboratory
[DE-AC05-00OR22725]
FX This research was sponsored by the Division of Chemical Sciences,
Geosciences, and Biosciences, Office of Basic Energy Sciences, U.S.
Department of Energy. This research was performed in part using the
resources of the Center for Computational Sciences at Oak Ridge National
Laboratory under Contract DE-AC05-00OR22725.
NR 30
TC 34
Z9 38
U1 0
U2 38
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0887-0624
EI 1520-5029
J9 ENERG FUEL
JI Energy Fuels
PD MAY
PY 2010
VL 24
BP 2857
EP 2867
DI 10.1021/ef1001953
PG 11
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA 611VE
UT WOS:000278851000009
ER
PT J
AU Stanis, RJ
Lambert, TN
Yaklin, MA
AF Stanis, Ronald J.
Lambert, Timothy N.
Yaklin, Melissa A.
TI Poly(3,4-ethylenedioxythiphene) (PEDOT)-Modified Anodes: Reduced
Methanol Crossover in Direct Methanol Fuel Cells
SO ENERGY & FUELS
LA English
DT Article
ID POLYMER ELECTROLYTE MEMBRANES; PROTON CONDUCTIVITY; POLYBENZIMIDAZOLE;
CATALYST; HYDROGEN; DMFC; PERFORMANCE; EFFICIENCY; SUPPORT; PEDOT
AB A new method to reduce methanol crossover in fuel cells is presented. This approach relies on coating an anode gas diffusion layer with poly(3,4-ethylenedioxythiophene), which is achieved by an electropolymerization method. Methanol permeability through commercially available gas diffusion layers was reduced from 4.5 x 10(-5) to as low as 1.8 x 10(-6) cm(2) s(-1). The use of the polymer increased the specific resistance from 0.07 to as high as 2.5 Omega cm(2). Fuel cell testing demonstrated a positive shift in cell voltage of about 70 mV in the low current density region of the polarization curves.
C1 [Stanis, Ronald J.; Lambert, Timothy N.; Yaklin, Melissa A.] Sandia Natl Labs, Dept Mat Devices & Energy Technol, Albuquerque, NM 87185 USA.
RP Lambert, TN (reprint author), Sandia Natl Labs, Dept Mat Devices & Energy Technol, POB 5800, Albuquerque, NM 87185 USA.
EM tnlambe@sandia.gov
FU Sandia National Laboratories [DE-AC04-94AL-85000]
FX This work was supported by Sandia National Laboratories. Sandia is a
multi-program laboratory operated by Sandia Corporation, a Lockheed
Martin Company, for the United States Department of Energy's National
Nuclear Security Administration under Contract DE-AC04-94AL-85000.
NR 22
TC 13
Z9 13
U1 0
U2 7
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0887-0624
J9 ENERG FUEL
JI Energy Fuels
PD MAY
PY 2010
VL 24
BP 3125
EP 3129
DI 10.1021/ef100034x
PG 5
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA 611VE
UT WOS:000278851000042
ER
PT J
AU Vijay, S
DeCarolis, JF
Srivastava, RK
AF Vijay, Samudra
DeCarolis, Joseph F.
Srivastava, Ravi K.
TI A bottom-up method to develop pollution abatement cost curves for
coal-fired utility boilers
SO ENERGY POLICY
LA English
DT Article
DE Air pollution control; Nitrogen oxides; Marginal abatement cost curves
ID DISTANCE FUNCTION-APPROACH; EMISSION CONTROL; ELECTRIC-POWER; SHADOW
PRICES; DERIVATION; SULFUR; SO2
AB This paper illustrates a new method to create supply curves for pollution abatement using boiler-level data that explicitly accounts for technology cost and performance. The Coal Utility Environmental Cost (CUECost) model is used to estimate retrofit costs for five different NO control configurations on a large subset of the existing coal-fired, utility-owned boilers in the US. The resultant data are used to create technology-specific marginal abatement cost curves (MACCs) and also serve as input to an integer linear program, which minimizes system-wide control costs by finding the optimal distribution of NO(x) controls across the modeled boilers under an emission constraint. The result is a single optimized MACC that accounts for detailed, boiler-specific information related to NO(x) retrofits. Because the resultant MACCs do not take into account regional differences in air-quality standards or pre-existing NO(x) controls, the results should not be interpreted as a policy prescription. The general method as well as NO(x)-specific results presented here should be of significant value to modelers and policy analysts who must estimate the costs of pollution reduction. (C) 2009 Elsevier Ltd. All rights reserved.
C1 [DeCarolis, Joseph F.] N Carolina State Univ, Dept Civil Construct & Environm Engn, Raleigh, NC 27695 USA.
[Vijay, Samudra; Srivastava, Ravi K.] US EPA, Natl Risk Management Res Lab, Air Pollut Prevent & Control Div, Res Triangle Pk, NC 27711 USA.
[Vijay, Samudra] ORISE, Oak Ridge, TN 37831 USA.
RP DeCarolis, JF (reprint author), N Carolina State Univ, Dept Civil Construct & Environm Engn, Raleigh, NC 27695 USA.
EM jdecarolis@ncsu.edu
RI DeCarolis, Joseph/F-4869-2013;
OI DeCarolis, Joseph/0000-0003-4677-4522
NR 32
TC 11
Z9 11
U1 1
U2 10
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0301-4215
J9 ENERG POLICY
JI Energy Policy
PD MAY
PY 2010
VL 38
IS 5
BP 2255
EP 2261
DI 10.1016/j.enpol.2009.12.013
PG 7
WC Energy & Fuels; Environmental Sciences; Environmental Studies
SC Energy & Fuels; Environmental Sciences & Ecology
GA 578JL
UT WOS:000276289500023
ER
PT J
AU Besmann, TM
AF Besmann, Theodore M.
TI Projections of US GHG reductions from nuclear power new capacity based
on historic levels of investment
SO ENERGY POLICY
LA English
DT Article
DE Nuclear power; Historical nuclear investment; Greenhouse gas emissions
ID PLANTS
AB Historical rates of capital investment in nuclear plant construction were used as a guide to estimate the potential rate of future capacity introduction. The total linear rate of capital expenditure over the entire period of historical construction from 1964 to 1990 was determined to equal $11.5 billion/yr, and that for the period of peak construction from 1973 to 1985 was computed as $17.9 billion/yr, all in 2004$. These values were used with a variety of current capital cost estimates for nuclear construction to obtain several scenarios for possible future nuclear capacity additions. These values were used to obtain the effect of projected nuclear generating capacity on GHG emissions assuming nuclear would directly replace coal-fired generation. It was concluded that actual reductions in emissions would not be experienced until 2038, yet growth in emissions from electrical production would be slowed through that period. Due to the significant time to introduce large-scale changes in the utility sector, nuclear energy cannot have a dramatic short-term effect on emissions. Nuclear power, however, can have a major positive longer term impact, particularly under more favorable cost and investment conditions. (C) 2009 Elsevier Ltd. All rights reserved.
C1 Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Besmann, TM (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, 1 Bethel Valley Rd,POB 2008,MS 6063, Oak Ridge, TN 37831 USA.
EM besmanntm@ornl.gov
FU University of Tennessee Institute for a Secure and Sustainable
Environment
FX The author thanks Richard Myers and David Bradish of NEI and Jonathan
Koomey of Stanford University for specific plant data. Thanks to Timothy
Valentine and Kent Williams of ORNL for their thorough reviews and
suggestions. Sincere appreciation also to Randall Gentry of the
University of Tennessee for initiating the project and providing funding
through the University of Tennessee Institute for a Secure and
Sustainable Environment. The work was performed by Oak Ridge National
Laboratory operated for the US Department of Energy.
NR 16
TC 4
Z9 4
U1 2
U2 5
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0301-4215
J9 ENERG POLICY
JI Energy Policy
PD MAY
PY 2010
VL 38
IS 5
BP 2431
EP 2437
DI 10.1016/j.enpol.2009.12.036
PG 7
WC Energy & Fuels; Environmental Sciences; Environmental Studies
SC Energy & Fuels; Environmental Sciences & Ecology
GA 578JL
UT WOS:000276289500042
ER
PT J
AU He, SM
Kunin, V
Haynes, M
Martin, HG
Ivanova, N
Rohwer, F
Hugenholtz, P
McMahon, KD
AF He, Shaomei
Kunin, Victor
Haynes, Matthew
Martin, Hector Garcia
Ivanova, Natalia
Rohwer, Forest
Hugenholtz, Philip
McMahon, Katherine D.
TI Metatranscriptomic array analysis of 'Candidatus Accumulibacter
phosphatis'-enriched enhanced biological phosphorus removal sludge
SO ENVIRONMENTAL MICROBIOLOGY
LA English
DT Article
ID DIFFERENTIAL GENE-EXPRESSION; ESCHERICHIA-COLI; ACTIVATED-SLUDGE;
POLYPHOSPHATE KINASE; SCALE; METABOLISM; BACTERIA; MODEL; COMMUNITIES;
RHODOCYCLUS
AB P>Here we report the first metatranscriptomic analysis of gene expression and regulation of 'Candidatus Accumulibacter'-enriched lab-scale sludge during enhanced biological phosphorus removal (EBPR). Medium density oligonucleotide microarrays were generated with probes targeting most predicted genes hypothesized to be important for the EBPR phenotype. RNA samples were collected at the early stage of anaerobic and aerobic phases (15 min after acetate addition and switching to aeration respectively). We detected the expression of a number of genes involved in the carbon and phosphate metabolisms, as proposed by EBPR models (e.g. polyhydroxyalkanoate synthesis, a split TCA cycle through methylmalonyl-CoA pathway, and polyphosphate formation), as well as novel genes discovered through metagenomic analysis. The comparison between the early stage anaerobic and aerobic gene expression profiles showed that expression levels of most genes were not significantly different between the two stages. The majority of upregulated genes in the aerobic sample are predicted to encode functions such as transcription, translation and protein translocation, reflecting the rapid growth phase of Accumulibacter shortly after being switched to aerobic conditions. Components of the TCA cycle and machinery involved in ATP synthesis were also upregulated during the early aerobic phase. These findings support the predictions of EBPR metabolic models that the oxidation of intracellularly stored carbon polymers through the TCA cycle provides ATP for cell growth when oxygen becomes available. Nitrous oxide reductase was among the very few Accumulibacter genes upregulated in the anaerobic sample, suggesting that its expression is likely induced by the deprivation of oxygen.
C1 [He, Shaomei; McMahon, Katherine D.] Univ Wisconsin, Dept Civil & Environm Engn, Madison, WI 53706 USA.
[Kunin, Victor; Martin, Hector Garcia; Ivanova, Natalia; Hugenholtz, Philip] DOE Joint Genome Inst, Walnut Creek, CA 94598 USA.
[Haynes, Matthew; Rohwer, Forest] San Diego State Univ, Dept Biol, San Diego, CA 92182 USA.
[McMahon, Katherine D.] Univ Wisconsin, Dept Bacteriol, Madison, WI 53706 USA.
RP McMahon, KD (reprint author), Univ Wisconsin, Dept Civil & Environm Engn, Madison, WI 53706 USA.
EM tmcmahon@engr.wisc.edu
RI Garcia Martin, Hector/B-5357-2009; Hugenholtz, Philip/G-9608-2011;
McMahon, Katherine/I-3651-2012;
OI Garcia Martin, Hector/0000-0002-4556-9685; McMahon, Katherine
D./0000-0002-7038-026X
FU National Science Foundation [BES 0332136]; US Department of Energy's
Office of Science; University of California, Lawrence Livermore National
Laboratory [W-7405-Eng-48]; Lawrence Berkeley National Laboratory
[DE-AC02-05CH11231]; Los Alamos National Laboratory [DE-AC02-06NA25396]
FX We thank Daniel Noguera and Jason Flowers for thoughtful discussion;
Daniel Gall and Andy Torkelson for operating the lab-scale reactor. We
acknowledge the generous help of Adel Talaat in the analysis of
microarray data. The assistance of personnel in the gene expression
centre at University of Wisconsin-Madison is greatly appreciated. This
project was funded by the National Science Foundation (BES 0332136 to
KDM), and conducted in part under the auspices of the US Department of
Energy's Office of Science, Biological and Environmental Research
Program, and by the University of California, Lawrence Livermore
National Laboratory under Contract No. W-7405-Eng-48, Lawrence Berkeley
National Laboratory under contract No. DE-AC02-05CH11231 and Los Alamos
National Laboratory under contract No. DE-AC02-06NA25396.
NR 38
TC 34
Z9 35
U1 3
U2 43
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1462-2912
J9 ENVIRON MICROBIOL
JI Environ. Microbiol.
PD MAY
PY 2010
VL 12
IS 5
BP 1205
EP 1217
DI 10.1111/j.1462-2920.2010.02163.x
PG 13
WC Microbiology
SC Microbiology
GA 587NV
UT WOS:000277000300010
PM 20148930
ER
PT J
AU Klepac-Ceraj, V
Lemon, KP
Martin, TR
Allgaier, M
Kembel, SW
Knapp, AA
Lory, S
Brodie, EL
Lynch, SV
Bohannan, BJM
Green, JL
Maurer, BA
Kolter, R
AF Klepac-Ceraj, Vanja
Lemon, Katherine P.
Martin, Thomas R.
Allgaier, Martin
Kembel, Steven W.
Knapp, Alixandra A.
Lory, Stephen
Brodie, Eoin L.
Lynch, Susan V.
Bohannan, Brendan J. M.
Green, Jessica L.
Maurer, Brian A.
Kolter, Roberto
TI Relationship between cystic fibrosis respiratory tract bacterial
communities and age, genotype, antibiotics and Pseudomonas aeruginosa
SO ENVIRONMENTAL MICROBIOLOGY
LA English
DT Article
ID PULMONARY INFECTIONS; ONLINE TOOL; DIVERSITY; LUNG; IDENTIFICATION;
EPIDEMIOLOGY; PERSPECTIVE; EVOLUTION; SOFTWARE; CHILDREN
AB P>Polymicrobial bronchopulmonary infections in cystic fibrosis (CF) cause progressive lung damage and death. Although the arrival of Pseudomonas aeruginosa often heralds a more rapid rate of pulmonary decline, there is significant inter-individual variation in the rate of decline, the causes of which remain poorly understood. By coupling culture-independent methods with ecological analyses, we discovered correlations between bacterial community profiles and clinical disease markers in respiratory tracts of 45 children with CF. Bacterial community complexity was inversely correlated with patient age, presence of P. aeruginosa and antibiotic exposure, and was related to CF genotype. Strikingly, bacterial communities lacking P. aeruginosa were much more similar to each other than were those containing P. aeruginosa, regardless of antibiotic exposure. This suggests that community composition might be a better predictor of disease progression than the presence of P. aeruginosa alone and deserves further study.
C1 [Klepac-Ceraj, Vanja; Lory, Stephen; Kolter, Roberto] Harvard Univ, Sch Med, Dept Microbiol & Mol Genet, Boston, MA 02115 USA.
[Lemon, Katherine P.] Harvard Univ, Sch Med, Childrens Hosp, Div Infect Dis, Boston, MA 02115 USA.
[Martin, Thomas R.; Knapp, Alixandra A.] Harvard Univ, Sch Med, Childrens Hosp, Div Resp Dis, Boston, MA 02115 USA.
[Allgaier, Martin; Lynch, Susan V.] Univ Calif San Francisco, Dept Anesthesia & Perioperat Care, San Francisco, CA 94143 USA.
[Kembel, Steven W.; Bohannan, Brendan J. M.; Green, Jessica L.] Univ Oregon, Ctr Ecol & Evolutionary Biol, Eugene, OR 97403 USA.
[Brodie, Eoin L.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
[Maurer, Brian A.] Michigan State Univ, Dept Fisheries & Wildlife, E Lansing, MI 48824 USA.
RP Klepac-Ceraj, V (reprint author), Harvard Univ, Sch Med, Dept Microbiol & Mol Genet, Boston, MA 02115 USA.
EM vanjakle@gmail.com
RI Gough, Ethan/B-8633-2012; Lynch, Susan/B-6272-2009; Brodie,
Eoin/A-7853-2008;
OI Brodie, Eoin/0000-0002-8453-8435; Klepac-Ceraj,
Vanja/0000-0001-5387-5706; Kembel, Steven/0000-0001-5224-0952
FU Cystic Fibrosis Foundation
FX We thank the children, and their families, who participated in this
study. We thank the Children's Hospital Boston Division of Respiratory
Diseases research coordinators for patient enrolment and data
collection. We thank I. Ceraj and M.L. Coleman for help with data
analysis, comments and discussion. We thank M.F. Polz, J.R. Thompson,
D.K. Newman, H.C. Vlamakis, R.J. Case, C.N. Peterson, P. Klepac and E.A.
Gontang for critical reading of the manuscript. We thank members of the
Kolter lab for thoughtful discussions and Todd DeSantis, Yvette Piceno
and Gary Andersen for their assistance with the PhyloChip. The Cystic
Fibrosis Foundation funded V.K.-C.
NR 54
TC 114
Z9 115
U1 3
U2 23
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1462-2912
J9 ENVIRON MICROBIOL
JI Environ. Microbiol.
PD MAY
PY 2010
VL 12
IS 5
BP 1293
EP 1303
DI 10.1111/j.1462-2920.2010.02173.x
PG 11
WC Microbiology
SC Microbiology
GA 587NV
UT WOS:000277000300017
PM 20192960
ER
PT J
AU Labare, MP
Bays, JT
Butkus, MA
Snyder-Leiby, T
Smith, A
Goldstein, A
Schwartz, JD
Wilson, KC
Ginter, MR
Bare, EA
Watts, RE
Michealson, E
Miller, N
LaBranche, R
AF Labare, Michael P.
Bays, J. Timothy
Butkus, Michael A.
Snyder-Leiby, Teresa
Smith, Alicia
Goldstein, Amanda
Schwartz, Jenna D.
Wilson, Kristopher C.
Ginter, Melody R.
Bare, Elizabeth A.
Watts, Robert E.
Michealson, Elizabeth
Miller, Nicole
LaBranche, Rachel
TI The effects of elevated carbon dioxide levels on a Vibrio sp isolated
from the deep-sea
SO ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
LA English
DT Article
DE Carbon dioxide; Vibrio alginolyticus; 9NA; Direct injection; Deep-sea;
Carbon sequestration
ID OCEAN DISPOSAL; MEMBRANE DAMAGE; CO2; MORPHOLOGY; INJECTION; PRESSURE;
IMPACTS; LYSIS; PH
AB The effect of oceanic CO(2) sequestration was examined exposing a deep-sea bacterium identified as Vibrio alginolyticus (9NA) to elevated levels of carbon dioxide and monitoring its growth at 2,750 psi (1,846 m depth).
The wild-type strain of 9NA could not grow in acidified marine broth below a pH of 5. The pH of marine broth did not drop below this level until at least 20.8 mM of CO(2) was injected into the medium. 9NA did not grow at this CO(2) concentration or higher concentrations (31.2 and 41.6 mM) for at least 72 h. Carbon dioxide at 10.4 mM also inhibited growth, but the bacterium was able to recover and grow. Exposure to CO(2) caused the cell to undergo a morphological change and form a dimple-like structure. The membrane was also damaged but with no protein leakage.
C1 [Labare, Michael P.; Smith, Alicia; Goldstein, Amanda; Schwartz, Jenna D.; Wilson, Kristopher C.; Ginter, Melody R.; Bare, Elizabeth A.; Watts, Robert E.; Michealson, Elizabeth; Miller, Nicole; LaBranche, Rachel] US Mil Acad, Dept Chem & Life Sci, West Point, NY 10996 USA.
[Bays, J. Timothy] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Butkus, Michael A.] US Mil Acad, Dept Geog & Environm Engn, West Point, NY 10996 USA.
[Snyder-Leiby, Teresa] SUNY Coll New Paltz, Dept Biol, New Paltz, NY USA.
RP Labare, MP (reprint author), US Mil Acad, Dept Chem & Life Sci, West Point, NY 10996 USA.
EM michael.labare@USMA.edu
FU Army Research Office; Department of Chemistry and Life Science's
FX The authors thank Professor Frank Millero, University of Miami, for
providing the sea water equilibrium model and Dr. Carl Wirsen for the
strain of 9NA. This work was supported by a grant from the Army Research
Office and the Department of Chemistry and Life Science's Undergraduate
Research Program.
NR 27
TC 9
Z9 9
U1 0
U2 8
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 0944-1344
J9 ENVIRON SCI POLLUT R
JI Environ. Sci. Pollut. Res.
PD MAY
PY 2010
VL 17
IS 4
BP 1009
EP 1015
DI 10.1007/s11356-010-0297-z
PG 7
WC Environmental Sciences
SC Environmental Sciences & Ecology
GA 583EO
UT WOS:000276656300020
PM 20140649
ER
PT J
AU Hetmaniuk, UL
Lehoucq, RB
AF Hetmaniuk, Ulrich L.
Lehoucq, Richard B.
TI A SPECIAL FINITE ELEMENT METHOD BASED ON COMPONENT MODE SYNTHESIS
SO ESAIM-MATHEMATICAL MODELLING AND NUMERICAL ANALYSIS-MODELISATION
MATHEMATIQUE ET ANALYSE NUMERIQUE
LA English
DT Article
DE Eigenvalues; modal analysis; multilevel; substructuring; domain
decomposition; dimensional reduction; finite elements
ID ELLIPTIC PROBLEMS
AB The goal of our paper is to introduce basis functions for the finite element discretization of a second order linear elliptic operator with rough or highly oscillating coefficients. The proposed basis functions are inspired by the classic idea of component mode synthesis and exploit an orthogonal decomposition of the trial subspace to minimize the energy. Numerical experiments illustrate the effectiveness of the proposed basis functions.
C1 [Hetmaniuk, Ulrich L.] Univ Washington, Dept Appl Math, Seattle, WA 98195 USA.
[Lehoucq, Richard B.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Hetmaniuk, UL (reprint author), Univ Washington, Dept Appl Math, Box 352420, Seattle, WA 98195 USA.
EM hetmaniu@u.washington.edu; rblehou@sandia.gov
FU Laboratory Directed Research and Development program at Sandia National
Laboratories; U.S. Department of Energy [DE-AC04-94AL85000]
FX The authors acknowledge the useful comments from the anonymous referees
and Dan Segalman of Sandia National Laboratories. They also thank Prof.
J. Osborn (U. Maryland) and Prof. U. Banerjee (Syracuse U.) for
enlightening discussions about the generalized finite element method and
the n-width. U.L. Hetmaniuk was supported in part by the Laboratory
Directed Research and Development program at Sandia National
Laboratories. R.B. Lehoucq was supported by the Laboratory Directed
Research and Development program at Sandia National Laboratories. Sandia
is a multiprogram laboratory operated by Sandia Corporation, a Lockheed
Martin Company, for the U.S. Department of Energy under contract
DE-AC04-94AL85000.
NR 14
TC 11
Z9 11
U1 0
U2 4
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0764-583X
J9 ESAIM-MATH MODEL NUM
JI ESAIM-Math. Model. Numer. Anal.-Model. Math. Anal. Numer.
PD MAY-JUN
PY 2010
VL 44
IS 3
BP 401
EP 420
DI 10.1051/m2an/2010007
PG 20
WC Mathematics, Applied
SC Mathematics
GA 601NY
UT WOS:000278069500001
ER
PT J
AU Sibirtsev, A
Haidenbauer, J
Krewald, S
Meissner, UG
AF Sibirtsev, A.
Haidenbauer, J.
Krewald, S.
Meissner, U. -G.
TI Primakoff effect in eta-photoproduction off protons
SO EUROPEAN PHYSICAL JOURNAL A
LA English
DT Letter
ID CHIRAL PERTURBATION-THEORY; ANOMALOUS WARD IDENTITIES; PSEUDOSCALAR
MESONS; RADIATIVE WIDTH; HYDROGEN; MODEL; COLLISIONS; ASYMMETRY; TARGET;
QUARK
AB We analyse data on forward eta-meson photoproduction off a proton target and extract the eta ->gamma gamma decay width utilizing the Primakoff effect. The hadronic amplitude that enters into our analysis is strongly constrained because it is fixed from a global fit to available gamma p -> p eta data for differential cross-sections and polarizations. We compare our results with present information on the two-photon eta-decay from the literature. We provide predictions for future PrimEx experiments at Jefferson Laboratory in order to motivate further studies.
C1 [Sibirtsev, A.; Meissner, U. -G.] Univ Bonn, Helmholtz Inst Strahlen & Kernphys Theorie, D-53115 Bonn, Germany.
[Sibirtsev, A.; Meissner, U. -G.] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany.
[Sibirtsev, A.] Thomas Jefferson Natl Accelerator Facil, EBAC, Newport News, VA 23606 USA.
[Haidenbauer, J.; Krewald, S.; Meissner, U. -G.] Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany.
[Sibirtsev, A.; Haidenbauer, J.; Krewald, S.; Meissner, U. -G.] Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
[Sibirtsev, A.; Haidenbauer, J.; Krewald, S.; Meissner, U. -G.] Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany.
RP Sibirtsev, A (reprint author), Univ Bonn, Helmholtz Inst Strahlen & Kernphys Theorie, D-53115 Bonn, Germany.
EM meissner@hiskp.uni-bonn.de
NR 44
TC 6
Z9 6
U1 0
U2 2
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1434-6001
J9 EUR PHYS J A
JI Eur. Phys. J. A
PD MAY
PY 2010
VL 44
IS 2
BP 169
EP 173
DI 10.1140/epja/i2010-10961-7
PG 5
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 589VS
UT WOS:000277182900001
ER
PT J
AU Rougemaille, N
Schmid, AK
AF Rougemaille, N.
Schmid, A. K.
TI Magnetic imaging with spin-polarized low-energy electron microscopy
SO EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS
LA English
DT Review
ID THIN FERROMAGNETIC-FILMS; PHASE-TRANSITION; ULTRATHIN FILMS; NI-FILMS;
TUNNELING MAGNETORESISTANCE; REORIENTATION TRANSITION;
CIRCULAR-DICHROISM; MATERIALS SCIENCE; ROOM-TEMPERATURE;
DOMAIN-STRUCTURE
AB Spin-polarized low-energy electron microscopy (SPLEEM) is a technique for imaging magnetic microstructures at surfaces and in thin films. In this article, principles, advantages and limitations of SPLEEM are reviewed. Several recent studies illustrate how SPLEEM can be used to investigate spin reorientation transition phenomena, to determine magnetic domain configurations in low-dimensional structures, or to explore physics of magnetic couplings in layered systems. The work highlights the capability of the technique to reveal in situ and in real time quantitative information on micromagnetic configurations and structure-property relationships. In addition, spectroscopic reflectivity measurements with spin-polarized low-energy electron beams can be a useful tool to probe spin-dependent unoccupied band structure of magnetic materials and electronic properties of buried magnetic interfaces.
C1 [Rougemaille, N.] CNRS & Univ Joseph Fourier, Inst Neel, F-38042 Grenoble 9, France.
[Schmid, A. K.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Rougemaille, N (reprint author), CNRS & Univ Joseph Fourier, Inst Neel, BP 166, F-38042 Grenoble 9, France.
EM nicolas.rougemaille@grenoble.cnrs.fr
FU Delegation Generale pour l'Armement [9860830051 (NR)]; US Department of
Energy, Office of Basic Energy Sciences, Division of Materials Sciences
and Engineering [DEAC02-05CH11231 (AKS)]
FX We gratefully acknowledge support by the Delegation Generale pour
l'Armement under Contract No. 9860830051 (NR) and by the US Department
of Energy, Office of Basic Energy Sciences, Division of Materials
Sciences and Engineering under Contract No. DEAC02-05CH11231 (AKS).
NR 130
TC 42
Z9 42
U1 3
U2 35
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 1286-0042
EI 1286-0050
J9 EUR PHYS J-APPL PHYS
JI Eur. Phys. J.-Appl. Phys
PD MAY
PY 2010
VL 50
IS 2
AR 20101
DI 10.1051/epjap/2010048
PG 18
WC Physics, Applied
SC Physics
GA 579IG
UT WOS:000276362000018
ER
PT J
AU Rodriguez, D
Blaum, K
Nortershauser, W
Ahammed, M
Algora, A
Audi, G
Aysto, J
Beck, D
Bender, M
Billowes, J
Block, M
Bohm, C
Bollen, G
Brodeur, M
Brunner, T
Bushaw, BA
Cakirli, RB
Campbell, P
Cano-Ott, D
Cortes, G
Lopez-Urrutia, JRC
Das, P
Dax, A
De, A
Delheij, P
Dickel, T
Dilling, J
Eberhardt, K
Eliseev, S
Ettenauer, S
Flanagan, KT
Ferrer, R
Garcia-Ramos, JE
Gartzke, E
Geissel, H
George, S
Geppert, C
Gomez-Hornillos, MB
Gusev, Y
Habs, D
Heenen, PH
Heinz, S
Herfurth, F
Herlert, A
Hobein, M
Huber, G
Huyse, M
Jesch, C
Jokinen, A
Kester, O
Ketelaer, J
Kolhinen, V
Koudriavtsev, I
Kowalska, M
Kramer, J
Kreim, S
Krieger, A
Kuhl, T
Lallena, AM
Lapierre, A
Le Blanc, F
Litvinov, YA
Lunney, D
Martinez, T
Marx, G
Matos, M
Minaya-Ramirez, E
Moore, I
Nagy, S
Naimi, S
Neidherr, D
Nesterenko, D
Neyens, G
Novikov, YN
Petrick, M
Plass, WR
Popov, A
Quint, W
Ray, A
Reinhard, PG
Repp, J
Roux, C
Rubio, B
Sanchez, R
Schabinger, B
Scheidenberger, C
Schneider, D
Schuch, R
Schwarz, S
Schweikhard, L
Seliverstov, M
Solders, A
Suhonen, M
Szerypo, J
Tain, JL
Thirolf, PG
Ullrich, J
Van Duppen, P
Vasiliev, A
Vorobjev, G
Weber, C
Wendt, K
Winkler, M
Yordanov, D
Ziegler, F
AF Rodriguez, D.
Blaum, K.
Noertershaeuser, W.
Ahammed, M.
Algora, A.
Audi, G.
Aysto, J.
Beck, D.
Bender, M.
Billowes, J.
Block, M.
Boehm, C.
Bollen, G.
Brodeur, M.
Brunner, T.
Bushaw, B. A.
Cakirli, R. B.
Campbell, P.
Cano-Ott, D.
Cortes, G.
Crespo Lopez-Urrutia, J. R.
Das, P.
Dax, A.
De, A.
Delheij, P.
Dickel, T.
Dilling, J.
Eberhardt, K.
Eliseev, S.
Ettenauer, S.
Flanagan, K. T.
Ferrer, R.
Garcia-Ramos, J. -E.
Gartzke, E.
Geissel, H.
George, S.
Geppert, C.
Gomez-Hornillos, M. B.
Gusev, Y.
Habs, D.
Heenen, P. -H.
Heinz, S.
Herfurth, F.
Herlert, A.
Hobein, M.
Huber, G.
Huyse, M.
Jesch, C.
Jokinen, A.
Kester, O.
Ketelaer, J.
Kolhinen, V.
Koudriavtsev, I.
Kowalska, M.
Kraemer, J.
Kreim, S.
Krieger, A.
Kuehl, T.
Lallena, A. M.
Lapierre, A.
Le Blanc, F.
Litvinov, Y. A.
Lunney, D.
Martinez, T.
Marx, G.
Matos, M.
Minaya-Ramirez, E.
Moore, I.
Nagy, S.
Naimi, S.
Neidherr, D.
Nesterenko, D.
Neyens, G.
Novikov, Y. N.
Petrick, M.
Plass, W. R.
Popov, A.
Quint, W.
Ray, A.
Reinhard, P. -G.
Repp, J.
Roux, C.
Rubio, B.
Sanchez, R.
Schabinger, B.
Scheidenberger, C.
Schneider, D.
Schuch, R.
Schwarz, S.
Schweikhard, L.
Seliverstov, M.
Solders, A.
Suhonen, M.
Szerypo, J.
Tain, J. L.
Thirolf, P. G.
Ullrich, J.
Van Duppen, P.
Vasiliev, A.
Vorobjev, G.
Weber, C.
Wendt, K.
Winkler, M.
Yordanov, D.
Ziegler, F.
TI MATS and LaSpec: High-precision experiments using ion traps and lasers
at FAIR
SO EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
LA English
DT Review
ID ABSOLUTE MASS MEASUREMENTS; PROTON NEUTRON INTERACTION; TRUE CYCLOTRON
FREQUENCY; SUPERALLOWED BETA-DECAY; DATA-ACQUISITION SYSTEM; SHORT-LIVED
NUCLIDES; ART. NO. 142501; PENNING TRAP; CHARGED IONS; ALPHA-DECAY
AB Nuclear ground state properties including mass, charge radii, spins and moments can be determined by applying atomic physics techniques such as Penning-trap based mass spectrometry and laser spectroscopy. The MATS and LaSpec setups at the low-energy beamline at FAIR will allow us to extend the knowledge of these properties further into the region far from stability.
The mass and its inherent connection with the nuclear binding energy is a fundamental property of a nuclide, a unique "fingerprint". Thus, precise mass values are important for a variety of applications, ranging from nuclear-structure studies like the investigation of shell closures and the onset of deformation, tests of nuclear mass models and mass formulas, to tests of the weak interaction and of the Standard Model. The required relative accuracy ranges from 10(-5) to below 10(-8) for radionuclides, which most often have half-lives well below 1 s. Substantial progress in Penning trap mass spectrometry has made this method a prime choice for precision measurements on rare isotopes. The technique has the potential to provide high accuracy and sensitivity even for very short-lived nuclides. Furthermore, ion traps can be used for precision decay studies and offer advantages over existing methods.
With MATS (Precision Measurements of very short-lived nuclei using an Advanced Trapping System for highly-charged ions) at FAIR we aim to apply several techniques to very short-lived radionuclides: High-accuracy mass measurements, in-trap conversion electron and alpha spectroscopy, and trap-assisted spectroscopy. The experimental setup of MATS is a unique combination of an electron beam ion trap for charge breeding, ion traps for beam preparation, and a high-precision Penning trap system for mass measurements and decay studies. For the mass measurements, MATS offers both a high accuracy and a high sensitivity. A relative mass uncertainty of 10(-9) can be reached by employing highly-charged ions and a non-destructive Fourier-Transform Ion-Cyclotron-Resonance (FT-ICR) detection technique on single stored ions. This accuracy limit is important for fundamental interaction tests, but also allows for the study of the fine structure of the nuclear mass surface with unprecedented accuracy, whenever required. The use of the FT-ICR technique provides true single ion sensitivity. This is essential to access isotopes that are produced with minimum rates which are very often the most interesting ones. Instead of pushing for highest accuracy, the high charge state of the ions can also be used to reduce the storage time of the ions, hence making measurements on even shorter-lived isotopes possible.
Decay studies in ion traps will become possible with MATS. Novel spectroscopic tools for in-trap high-resolution conversion-electron and charged-particle spectroscopy from carrier-free sources will be developed, aiming e. g. at the measurements of quadrupole moments and E0 strengths. With the possibility of both high-accuracy mass measurements of the shortest-lived isotopes and decay studies, the high sensitivity and accuracy potential of MATS is ideally suited for the study of very exotic nuclides that will only be produced at the FAIR facility.
Laser spectroscopy of radioactive isotopes and isomers is an efficient and model-independent approach for the determination of nuclear ground and isomeric state properties. Hyperfine structures and isotope shifts in electronic transitions exhibit readily accessible information on the nuclear spin, magnetic dipole and electric quadrupole moments as well as root-mean-square charge radii. The dependencies of the hyperfine splitting and isotope shift on the nuclear moments and mean square nuclear charge radii are well known and the theoretical framework for the extraction of nuclear parameters is well established. These extracted parameters provide fundamental information on the structure of nuclei at the limits of stability. Vital information on both bulk and valence nuclear properties are derived and an exceptional sensitivity to changes in nuclear deformation is achieved. Laser spectroscopy provides the only mechanism for such studies in exotic systems and uniquely facilitates these studies in a model-independent manner.
The accuracy of laser-spectroscopic-determined nuclear properties is very high. Requirements concerning production rates are moderate; collinear spectroscopy has been performed with production rates as few as 100 ions per second and laser-desorption resonance ionization mass spectroscopy (combined with beta-delayed neutron detection) has been achieved with rates of only a few atoms per second.
This Technical Design Report describes a new Penning trap mass spectrometry setup as well as a number of complementary experimental devices for laser spectroscopy, which will provide a complete system with respect to the physics and isotopes that can be studied. Since MATS and LaSpec require high-quality low-energy beams, the two collaborations have a common beamline to stop the radioactive beam of in-flight produced isotopes and prepare them in a suitable way for transfer to the MATS and LaSpec setups, respectively.
C1 [Rodriguez, D.; Lallena, A. M.] Univ Granada, Dept Fis Atom Mol & Nucl, E-18071 Granada, Spain.
[Blaum, K.; Boehm, C.; Cakirli, R. B.; Crespo Lopez-Urrutia, J. R.; Eliseev, S.; Ketelaer, J.; Kowalska, M.; Kreim, S.; Litvinov, Y. A.; Nagy, S.; Neidherr, D.; Repp, J.; Roux, C.; Schabinger, B.; Ullrich, J.] Max Planck Inst Nucl Phys, D-69029 Heidelberg, Germany.
[Noertershaeuser, W.; Eberhardt, K.; Geppert, C.; Kraemer, J.; Krieger, A.; Sanchez, R.] Johannes Gutenberg Univ Mainz, Inst Kernchem, D-55099 Mainz, Germany.
[Ahammed, M.; Das, P.; Ray, A.] Ctr Variable Energy Cyclotron, Kolkata, Bidhanagar, India.
[Algora, A.; Rubio, B.; Tain, J. L.] Univ Valencia, IFIC, CSIC, Valencia 46071, Spain.
[Audi, G.; Lunney, D.; Naimi, S.] CNRS, CSNSM, IN2P3, F-91405 Orsay, France.
[Aysto, J.; Jokinen, A.; Kolhinen, V.; Moore, I.] Univ Jyvaskyla, Dept Phys, Jyvaskyla 40014, Finland.
[Beck, D.; Block, M.; Geissel, H.; Heinz, S.; Herfurth, F.; Kuehl, T.; Litvinov, Y. A.; Minaya-Ramirez, E.; Plass, W. R.; Quint, W.; Scheidenberger, C.; Winkler, M.] Helmholtzzentrum Schwerionenforsch GmbH, GSI, D-64291 Darmstadt, Germany.
[Bender, M.] CEN Bordeaux Gradignan, IN2P3, Bordeaux, France.
[Billowes, J.; Campbell, P.; Flanagan, K. T.; Schwarz, S.] Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, Lancs, England.
[Bollen, G.; Ferrer, R.; George, S.; Kester, O.] Michigan State Univ, NSCL, E Lansing, MI 48824 USA.
[Brodeur, M.; Brunner, T.; Delheij, P.; Dilling, J.; Ettenauer, S.; Lapierre, A.] TRIUMF, Vancouver, BC V6T 2A3, Canada.
[Bushaw, B. A.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Cano-Ott, D.; Martinez, T.] CIEMAT, E-28040 Madrid, Spain.
[Cortes, G.; Gomez-Hornillos, M. B.] UPC, Barcelona 08034, Spain.
[Dax, A.; Herlert, A.; Yordanov, D.] CERN, CH-1211 Geneva 23, Switzerland.
[De, A.] Raniganj Girls Coll, Raniganj, W Bengal, India.
[Dickel, T.; Geissel, H.; Jesch, C.; Petrick, M.; Plass, W. R.; Scheidenberger, C.] Univ Giessen, Inst Phys 2, D-35390 Giessen, Germany.
[Garcia-Ramos, J. -E.] Univ Huelva, Dept Fis Aplicada, Huelva 21071, Spain.
[Gartzke, E.; Habs, D.; Szerypo, J.; Thirolf, P. G.; Weber, C.] Univ Munich, Dept Phys, D-85748 Garching, Germany.
[Gusev, Y.; Nesterenko, D.; Novikov, Y. N.; Popov, A.; Seliverstov, M.; Vasiliev, A.; Vorobjev, G.] St Petersburg Nucl Phys Inst, Gatchina 188359, Russia.
[Gusev, Y.; Nesterenko, D.; Novikov, Y. N.; Popov, A.; Seliverstov, M.; Vasiliev, A.; Vorobjev, G.] St Petersburg State Univ, St Petersburg 198904, Russia.
[Heenen, P. -H.] Univ Libre Bruxelles, PNTPM, B-1050 Brussels, Belgium.
[Marx, G.; Schweikhard, L.; Ziegler, F.] Ernst Moritz Arndt Univ Greifswald, Inst Phys, D-17487 Greifswald, Germany.
[Hobein, M.; Schuch, R.; Solders, A.; Suhonen, M.] Stockholm Univ, SCFAB, S-10691 Stockholm, Sweden.
[Huber, G.; Wendt, K.] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany.
[Huyse, M.; Koudriavtsev, I.; Neyens, G.; Van Duppen, P.] Katholieke Univ Leuven, B-3001 Louvain, Belgium.
[Le Blanc, F.] CNRS, IN2P3, F-91405 Orsay, France.
[Matos, M.] Louisiana State Univ, Baton Rouge, LA 70803 USA.
[Reinhard, P. -G.] Univ Erlangen Nurnberg, Inst Theoret Phys 2, D-91054 Erlangen, Germany.
[Schneider, D.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Rodriguez, D (reprint author), Univ Granada, Dept Fis Atom Mol & Nucl, E-18071 Granada, Spain.
EM danielrodriguez@ugr.es
RI Rodriguez, Daniel/A-1692-2009; Crespo Lopez-Urrutia, Jose
R./F-7069-2011; Wendt, Klaus/D-7306-2011; Matos, Milan/G-6947-2012;
Nortershauser, Wilfried/A-6671-2013; Kuhl, Thomas/C-2243-2012; Herlert,
Alexander/D-7138-2013; Cortes, Guillem/B-6869-2014; Garcia-Ramos,
Jose-Enrique/K-2817-2014; Tain, Jose L./K-2492-2014; Cano Ott,
Daniel/K-4945-2014; Rubio, Berta/M-1060-2014; Flanagan,
Kieran/B-7575-2015; Yordanov, Deyan/C-3187-2015; Algora,
Alejandro/E-2960-2015; Bender, Michael/B-9004-2009; Lallena,
Antonio/H-7456-2015; Block, Michael/I-2782-2015; Moore,
Iain/D-7255-2014; Novikov, Iurii/M-7784-2013; Dickel, Timo/P-8227-2015;
Jokinen, Ari/C-2477-2017;
OI Rodriguez, Daniel/0000-0002-2989-7566; Crespo Lopez-Urrutia, Jose
R./0000-0002-2937-8037; Wendt, Klaus/0000-0002-9033-9336; Matos,
Milan/0000-0003-1722-9509; Nortershauser, Wilfried/0000-0001-7432-3687;
Kuhl, Thomas/0000-0001-6306-4579; Garcia-Ramos,
Jose-Enrique/0000-0001-6272-1792; Cano Ott, Daniel/0000-0002-9568-7508;
Rubio, Berta/0000-0002-9149-4151; Flanagan, Kieran/0000-0003-0847-2662;
Yordanov, Deyan/0000-0002-1592-7779; Algora,
Alejandro/0000-0002-5199-1794; Lallena, Antonio/0000-0003-1962-6217;
Block, Michael/0000-0001-9282-8347; Moore, Iain/0000-0003-0934-8727;
Novikov, Iurii/0000-0002-5369-7142; Dickel, Timo/0000-0002-5965-8689;
Jokinen, Ari/0000-0002-0451-125X; Gomez Hornillos, M
Belen/0000-0002-9282-9195; Brunner, Thomas/0000-0002-3131-8148
FU Max-Planck Society from the Helmholtz Association of German Research
Centres [VH-NG-033, VH-NG-037, VH-NG-148]; GSI [GIMET2];
Bundesministerium fur Bildung und Forschung (BMBF) (Germany) [06GI185I,
06GI9114I]; funding agencies in Spain; Junta de Andalucia; CPAN (Centro
Nacional de Particulas Astroparticulas y Nuclear)
FX This manuscript has been acomplished by the contributions from several
members of the MATS and LaSpec collaborations. All the contributions are
acknowledged and without them this document would not exist. We
acknowledge support from the Max-Planck Society from the Helmholtz
Association of German Research Centres (contract no. VH-NG-033,
VH-NG-037 and VH-NG-148), GSI (contract no. GIMET2), and
Bundesministerium fur Bildung und Forschung (BMBF) (Germany) (contract
no. 06GI185I and 06GI9114I). We also acknowledge support from several
funding agencies in Spain which provided economical support for the
organization of the 3rd LaSpec-MATS collaboration meeting
held in Matalascnas (Huelva) in October 2008. This meeting served to fix
the TDR contents. These funding agencies are Junta de Andalucia and CPAN
(Centro Nacional de Particulas Astroparticulas y Nuclear).
NR 317
TC 50
Z9 51
U1 0
U2 30
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 1951-6355
EI 1951-6401
J9 EUR PHYS J-SPEC TOP
JI Eur. Phys. J.-Spec. Top.
PD MAY
PY 2010
VL 183
BP 1
EP 123
DI 10.1140/epjst/e2010-01231-2
PG 123
WC Physics, Multidisciplinary
SC Physics
GA 627SA
UT WOS:000280061400001
ER
PT J
AU Kim, S
Kihm, KD
Thundat, T
AF Kim, Seonghwan
Kihm, Kenneth D.
Thundat, Thomas
TI Fluidic applications for atomic force microscopy (AFM) with
microcantilever sensors
SO EXPERIMENTS IN FLUIDS
LA English
DT Review
ID SCANNING PROBE MICROSCOPY; FRICTION VACUUM GAUGE; PARTICLE IMAGE
VELOCIMETRY; LASER-INDUCED FLUORESCENCE; VIBRATING-WIRE VISCOMETER; THIN
POLYMER-FILMS; PHOTOTHERMAL VIBRATION; RESONANCE FREQUENCY;
HIGH-PRESSURES; QUARTZ OSCILLATOR
AB This review presents the fundamentals of atomic force microscopy (AFM) with microcantilever probes and their use as fluidic sensors for the measurement of micro/nanoscale transport properties. Over the last two decades, AFM has been widely used for, among other purposes, nanoscale topography, nanomechanical characterization, and intermolecular force spectroscopy. Furthermore, a microcantilever, an essential part of AFM, has been modified and exploited as a mechanical transducer for various sensing applications. Among many prospective uses, there appears to be great potential for micro/nanoscale sensing of fluid density and viscosity (Sect. 3.1), temperature (Sect. 3.2), pressure (Sect. 3.3), and flow velocity (Sect. 3.4). These micro/nanomechanical measurement techniques are expected to complement the advanced optical and electrical measurement techniques currently employed for micro/nanoscale fluidic sensors and also to fill the gap between microscale and nanoscale fluidic transport property measurements.
C1 [Kim, Seonghwan; Thundat, Thomas] Oak Ridge Natl Lab, Nanoscale Sci & Devices Grp, Biosci Div, Oak Ridge, TN 37831 USA.
[Kihm, Kenneth D.] Univ Tennessee, Dept Mech Aerosp & Biomed Engn, Knoxville, TN 37996 USA.
[Thundat, Thomas] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA.
RP Kim, S (reprint author), Oak Ridge Natl Lab, Nanoscale Sci & Devices Grp, Biosci Div, Oak Ridge, TN 37831 USA.
EM kims2@ornl.gov
RI Kim, Seonghwan/J-6884-2012
OI Kim, Seonghwan/0000-0001-7735-3582
FU UT-Battelle [DE-AC05-00OR22725]; Ministry of Education, Science and
Technology [R31-2008-000-10083-0]
FX We would like to thank our colleagues and collaborators cited in this
review for their contributions. S. Kim and T. Thundat would like to
thank DOE BER for its support. Oak Ridge National Laboratory is managed
by UT-Battelle under contract No. DE-AC05-00OR22725. The present study
was supported partially by the WCU (World Class University) Program
through the National Research Foundation of Korea funded by the Ministry
of Education, Science and Technology (R31-2008-000-10083-0).
NR 179
TC 12
Z9 12
U1 1
U2 33
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0723-4864
EI 1432-1114
J9 EXP FLUIDS
JI Exp. Fluids
PD MAY
PY 2010
VL 48
IS 5
BP 721
EP 736
DI 10.1007/s00348-010-0830-3
PG 16
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 581EZ
UT WOS:000276505600001
ER
PT J
AU Burin, MJ
Schartman, E
Ji, H
AF Burin, M. J.
Schartman, E.
Ji, H.
TI Local measurements of turbulent angular momentum transport in circular
Couette flow
SO EXPERIMENTS IN FLUIDS
LA English
DT Article
ID INDEPENDENTLY ROTATING CYLINDERS; DIRECT NUMERICAL-SIMULATION;
SHEAR-DRIVEN TURBULENCE; REYNOLDS-NUMBER; TAYLOR FLOW; REDUCTION;
VELOCITY; ANNULUS
AB We report on velocity fluctuations and the fluctuation-driven radial transport of angular momentum in turbulent circular Couette flow. Our apparatus is short (cylinder height to gap width ratio I" similar to 2) and of relatively high wall curvature (ratio of cylinder radii eta similar to 0.35). Fluctuation levels and the mean specific angular momentum are found to be roughly constant over radius, in accordance with previous studies featuring narrower gaps. Synchronized dual beam Laser Doppler Velocimetry (2D LDV) is used to directly measure the r - theta Reynolds stress component as a function of Reynolds number (Re), revealing approximate scalings in the non-dimensional angular momentum transport that confirm previous measurements of torque in similar flows. 2D LDV further allows for a decomposition of the turbulent transport to assess the relative roles of fluctuation intensity and r - theta cross-correlation. We find that the increasing angular momentum transport with Re is due to intensifying absolute fluctuation levels accompanied by a slightly weakening cross-correlation.
C1 [Burin, M. J.] Calif State Univ, Dept Phys, San Marcos, CA USA.
[Schartman, E.] Nova Photon Inc, Princeton, NJ 08540 USA.
[Ji, H.] Princeton Univ, Plasma Phys Lab, Princeton, NJ USA.
RP Burin, MJ (reprint author), Calif State Univ, Dept Phys, San Marcos, CA USA.
EM mburin@csusm.edu
NR 32
TC 17
Z9 17
U1 1
U2 10
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0723-4864
EI 1432-1114
J9 EXP FLUIDS
JI Exp. Fluids
PD MAY
PY 2010
VL 48
IS 5
BP 763
EP 769
DI 10.1007/s00348-009-0756-9
PG 7
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 581EZ
UT WOS:000276505600004
ER
PT J
AU Yakhelef, A
Timofeyuk, NK
Al-Khalili, JS
Thompson, IJ
AF Yakhelef, A.
Timofeyuk, N. K.
Al-Khalili, J. S.
Thompson, I. J.
TI Three-Body Spectrum of C-18 and its Relevance to r-Process
Nucleosynthesis
SO FEW-BODY SYSTEMS
LA English
DT Article
ID SHELL-MODEL; ISOTOPES; CORE; HALO
AB The C-18 spectrum has been studied in a three body n + n +C-16 model that includes deformation and the 2(+) excitation of the C-16 core as well as Pauli projection of forbidden states. The C-16 - n interaction employed in this study has been fitted to reproduce the experimental spectrum of C-17. The calculations show that two neutron separation energy in C-18 in consistent with three-body structure of this nucleus and predict more states bound with respect to three-body decay. The comparison of their position to known excited states in C-18 is discussed. These calculations suggest also that a few states may exist in astrophysically relevant region between the C-17+n and C-16 + 2n decay thresholds. The most important of them is 1(-) as it can give a large E1 resonant contribution to C-17(n, gamma)C-18 neutron capture. The calculations also suggest that a virtual s-wave state may exist above the C-17 + n threshold that can give rise to non-negligible M1 contributions to the C-17(n, gamma)C-18 reaction rate. The presence of these states in the C-18 spectrum can lead to an increased C-17(n, gamma)C-18 reaction rate, which can significantly influence the abundances of uranium and thorium synthesized in the r-process in the supernovae explosions.
C1 [Timofeyuk, N. K.; Al-Khalili, J. S.] Univ Surrey, Dept Phys, Surrey GU2 7XH, England.
[Yakhelef, A.] Univ Farhat Abbas Sefif, Dept Phys, Setif 19000, Algeria.
[Thompson, I. J.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Timofeyuk, NK (reprint author), Univ Surrey, Dept Phys, Surrey GU2 7XH, England.
EM N.Timofeyuk@surrey.ac.uk
FU UK's STFC [ST/F012012/1]; US Department of Energy through Lawrence
Livermore National Laboratory [DE-AC52-07NA27344]
FX A. Y. thanks Ferhat Abbas-Setif University for his Ph.D. studentship and
is grateful to Professor A. Bouldjedri for his support and direction. A.
Y. is also grateful to the University of Surrey for its hospitality
during his extended stay there. We acknowledge Professor B. A. Brown for
help with the Nushell calculations. Support from the UK's STFC grant
ST/F012012/1 and the US Department of Energy through Lawrence Livermore
National Laboratory Contract DE-AC52-07NA27344 are gratefully
acknowledged.
NR 26
TC 4
Z9 4
U1 0
U2 4
PU SPRINGER WIEN
PI WIEN
PA SACHSENPLATZ 4-6, PO BOX 89, A-1201 WIEN, AUSTRIA
SN 0177-7963
EI 1432-5411
J9 FEW-BODY SYST
JI Few-Body Syst.
PD MAY
PY 2010
VL 47
IS 4
BP 213
EP 224
DI 10.1007/s00601-010-0086-8
PG 12
WC Physics, Multidisciplinary
SC Physics
GA 590CG
UT WOS:000277200700003
ER
PT J
AU Fanta, SE
Hill, WR
Smith, TB
Roberts, BJ
AF Fanta, Shari E.
Hill, Walter R.
Smith, Timothy B.
Roberts, Brian J.
TI Applying the light: nutrient hypothesis to stream periphyton
SO FRESHWATER BIOLOGY
LA English
DT Article
DE benthic algae; light : nutrient hypothesis; periphyton; stoichiometry;
stream
ID ECOLOGICAL STOICHIOMETRY; PRIMARY PRODUCERS; ALGAE; PHOSPHORUS;
PHYTOPLANKTON; ECOSYSTEM; QUALITY; BALANCE; LAKES; LIMITATION
AB 1. The light : nutrient hypothesis (LNH) states that algal nutrient content is determined by the balance of light and dissolved nutrients available to algae during growth. Light and phosphorus gradients in both laboratory and natural streams were used to examine the relevance of the LNH to stream periphyton. Controlled gradients of light (12-426 lmol photons m(-2) s(-1)) and dissolved reactive phosphorus (DRP, 3-344 mu g L(-1)) were applied experimentally to large flow-through laboratory streams, and natural variability in canopy cover and discharge from a wastewater treatment facility created gradients of light (0.4-35 mol photons m(-2) day(-1)) and DRP (10-1766 mu g L(-1)) in a natural stream.
2. Periphyton phosphorus content was strongly influenced by the light and DRP gradients, ranging from 1.8 to 10.7 mu g mg AFDM(-1) in the laboratory streams and from 2.3 to 36.9 mu g mg AFDM(-1) in the natural stream. Phosphorus content decreased with increasing light and increased with increasing water column phosphorus. The simultaneous effects of light and phosphorus were consistent with the LNH that the balance between light and nutrients determines algal nutrient content.
3. In experiments in the laboratory streams, periphyton phosphorus increased hyperbolically with increasing DRP. Uptake then began levelling off around 50 mu g L(-1).
4. The relationship between periphyton phosphorus and the light : phosphorus ratio was highly nonlinear in both the laboratory and natural streams, with phosphorus content declining sharply with initial increases in the light : phosphorus ratio, then leveling off at higher values of the ratio.
5. Although light and DRP both affected periphyton phosphorus content, the effects of DRP were much stronger than those of light in both the laboratory and natural streams. DRP explained substantially more of the overall variability in periphyton phosphorus than did light, and light effects were evident only at lower phosphorus concentrations (<= 25 mu g L(-1)) in the laboratory streams. These results suggest that light has a significant negative effect on the food quality of grazers in streams only under a limited set of conditions.
C1 [Fanta, Shari E.; Hill, Walter R.; Smith, Timothy B.] Univ Illinois, Inst Nat Resource Sustainabil, Illinois Nat Hist Survey, Champaign, IL 61820 USA.
[Roberts, Brian J.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Hill, WR (reprint author), Univ Illinois, Inst Nat Resource Sustainabil, Illinois Nat Hist Survey, 1816 S Oak St, Champaign, IL 61820 USA.
EM whill@illinois.edu
FU U.S. Department of Energy [DE-AC050-0OR22725]; Illinois Council on Food
and Agricultural Research; ORNL
FX We thank staff from the Environmental Sciences Division at Oak Ridge
National Laboratory (ORNL) for enabling our use of the laboratory
streams. ORNL is managed by UT-Battelle under contract DE-AC050-0OR22725
with the U.S. Department of Energy. Anne Bartlett, Jason Berner, Cassie
Conner, Diana Flanagan, Christina Jovanovic, Michael Schmidt, Kate
Schowe and Hannah Snyder provided field and laboratory assistance. This
research was supported by a Strategic Research Initiative in Water
Quality grant from the Illinois Council on Food and Agricultural
Research. Brian Roberts was supported by a postdoctoral fellowship
through the ORNL Postdoctoral Research Associates Program administered
by Oak Ridge Associated Universities.
NR 29
TC 16
Z9 19
U1 8
U2 40
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0046-5070
J9 FRESHWATER BIOL
JI Freshw. Biol.
PD MAY
PY 2010
VL 55
IS 5
BP 931
EP 940
DI 10.1111/j.1365-2427.2009.02309.x
PG 10
WC Marine & Freshwater Biology
SC Marine & Freshwater Biology
GA 583EF
UT WOS:000276655200001
ER
PT J
AU Post, RF
AF Post, Richard F.
TI MAGNETOHYDRODYNAMIC STABILIZATION OF AXISYMMETRIC MIRROR SYSTEMS USING
PULSED ECRH
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Article
DE MHD stabilization; axisymmetric tandem mirror; pulsed ECRH
AB This paper, part of a continuing study of means for the stabilization of magnetohydrodynamic interchange modes in axisymmetric mirror-based plasma confinement systems, represents a preliminary look at a technique that would employ a train of plasma pressure pulses produced by electron cyclotron resonance heating (ECRH) to accomplish the stabilization. The use of sequentially pulsed ECRH rather than continuous-wave ECRH facilitates the localization of the heated-electron plasma pulses in regions of the magnetic field with positive field-line curvature, e.g., in the "expander" region of the mirror magnetic field, outside the outermost mirror. The technique proposed relies on the time-averaged effect of plasma pressure pulses generated in regions of positive field-line curvature to overcome the destabilizing effect of plasma pressure in regions of negative field-line curvature within the confinement region. The plasma pulses, when produced in regions of the confining field having a negative gradient, create transient ambipolar electric potentials, an effect studied in 1964 in the PLEIADE experiment in France. These electric fields preserve the localization of the hot-electron plasma pulse for times determined by ion inertia. It may be possible to use this aspect of pulsed ECRH not only to stabilize the plasma but also to plug mirror losses in a manner similar to that employed in the tandem mirror.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Post, RF (reprint author), Lawrence Livermore Natl Lab, POB 808,Mail Stop 184, Livermore, CA 94550 USA.
EM post3@llnl.gov
FU U.S. Department of Energy [DE-AC52-07NA27344]
FX The author wishes to thank D. Ryutov for helpful discussions. This work
was performed under the auspices of the U.S. Department of Energy by
Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344.
NR 9
TC 4
Z9 4
U1 0
U2 6
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD MAY
PY 2010
VL 57
IS 4
BP 335
EP 342
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 594JO
UT WOS:000277533900005
ER
PT J
AU Zhmoginov, AI
Fisch, NJ
AF Zhmoginov, A. I.
Fisch, N. J.
TI FEASIBILITY STUDIES OF ALPHA-PARTICLE CHANNELING IN MIRROR MACHINES
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Article
DE alpha channeling; mirror machines; ray tracing
ID ION-CYCLOTRON INSTABILITY; TANDEM-MIRROR; ROTATING PLASMA; BERNSTEIN
WAVES; REACTOR; TOKAMAKS; DIFFUSION; MODES
AB The linear magnetic trap is an attractive concept both for fusion reactors and for other plasma applications because of its relative engineering simplicity and high-beta operation. Applying the alpha-channeling technique to linear traps such as mirror machines can benefit this concept by efficiently redirecting alpha-particle energy to fuel ion heating or by otherwise sustaining plasma confinement, thus increasing the effective fusion reactivity. To identify waves suitable for alpha channeling, a rough optimization of the energy extraction rate with respect to the wave parameters is performed. After the optimal regime is identified, a systematic search for modes with similar parameters in mirror plasmas is performed, assuming quasi-longitudinal or quasi-transverse wave propagation. Several modes suitable for alpha-particle energy extraction are identified for both reactor designs and for proof-of-principle experiments.
C1 [Zhmoginov, A. I.; Fisch, N. J.] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Zhmoginov, AI (reprint author), Princeton Univ, Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM azhmogin@princeton.edu
FU U.S. Department of Energy [DE-FG02-06ER54851, DE-AC0276-CH03073]
FX This work was supported by U.S. Department of Energy contracts
DE-FG02-06ER54851 and DE-AC0276-CH03073.
NR 38
TC 3
Z9 3
U1 0
U2 2
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD MAY
PY 2010
VL 57
IS 4
BP 361
EP 368
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 594JO
UT WOS:000277533900008
ER
PT J
AU Molvik, A
Ivanov, A
Kulcinski, GL
Ryutov, D
Santarius, J
Simonen, T
Wirth, BD
Ying, A
AF Molvik, A.
Ivanov, A.
Kulcinski, G. L.
Ryutov, D.
Santarius, J.
Simonen, T.
Wirth, B. D.
Ying, A.
TI A GAS DYNAMIC TRAP NEUTRON SOURCE FOR FUSION MATERIAL AND SUBCOMPONENT
TESTING
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Article
DE deuterium-tritium neutron source; materials testing; subcomponents
testing
ID MATERIAL IRRADIATION FACILITY; DRIVEN FLUTE INSTABILITY; CONFINEMENT
SYSTEM; PROPULSION SYSTEM; BEAM INJECTION; TANDEM-MIRROR;
MICROSTRUCTURAL EVOLUTION; DISPLACEMENT CASCADES; STRUCTURAL-MATERIALS;
PLASMA-CONFINEMENT
AB The successful operation (with beta <= 60%, classical ions and electrons with T-e = 250 eV) of the gas dynamic trap device at the Budker Institute of Nuclear Physics in Novosibirsk, Russia, extrapolates to a 2 MW/m(2) dynamic trap neutron source (DTNS), which burns only similar to 100 g of tritium per full-power year. The DTNS has no physics, engineering, or technology showstoppers; the extension of neutral beam lines to steady state can use demonstrated engineering; and it supports near-term tokamaks and volume neutron sources. The DTNS provides a neutron spectrum similar to that of ITER and satisfies the missions specified by the materials community to test fusion materials (listed as one of the top grand challenges for engineering in the 21st century by the U.S. National Academy of Engineering) and subcomponents (including tritium-breeding blankets) needed to construct DEMO. The DTNS could serve as the first fusion nuclear science facility (FNSF), called for by ReNeW (the Research Needs Workshop), and could provide the data necessary for licensing subsequent FSNFs.
C1 [Molvik, A.; Simonen, T.] Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA.
[Ivanov, A.] Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
[Kulcinski, G. L.; Santarius, J.] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA.
[Ryutov, D.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Wirth, B. D.] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94709 USA.
[Ying, A.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
RP Molvik, A (reprint author), Oak Ridge Associated Univ, POB 117,MS-17, Oak Ridge, TN 37831 USA.
EM akmolvik@comcast.net
RI Wirth, Brian/O-4878-2015
OI Wirth, Brian/0000-0002-0395-0285
FU U.S. Department of Energy; Oak Ridge Associated Universities; LLNL
[DE-AC52-07NA27344]
FX This paper is based on the workshop "Assess the Mission and Technology
of a Gas Dynamic Trap Neutron Source for Fusion Material and Component
Testing and Qualification," which was held at LBNL, Berkeley,
California, on March 12, 2009. We thank W. Meier for helpful
discussions. Contributors to Sec. II are the following: B. D. Wirth,
University of California, Berkeley; R. J. Kurtz, Pacific Northwest
National Laboratory; G. R. Odette, University of California, Santa
Barbara; and S. J. Zink le, Oak Ridge National Laboratory. This work was
performed under the auspices of the U.S. Department of Energy, Oak Ridge
Associated Universities, and the LLNL under contract DE-AC52-07NA27344.
NR 140
TC 9
Z9 10
U1 1
U2 8
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
EI 1943-7641
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD MAY
PY 2010
VL 57
IS 4
BP 369
EP 394
PG 26
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 594JO
UT WOS:000277533900009
ER
PT J
AU Gotea, V
Visel, A
Westlund, JM
Nobrega, MA
Pennacchio, LA
Ovcharenko, I
AF Gotea, Valer
Visel, Axel
Westlund, John M.
Nobrega, Marcelo A.
Pennacchio, Len A.
Ovcharenko, Ivan
TI Homotypic clusters of transcription factor binding sites are a key
component of human promoters and enhancers
SO GENOME RESEARCH
LA English
DT Article
ID CIS-REGULATORY MODULES; GENOME-WIDE PREDICTION; FUNCTIONAL BINDING;
GENE-EXPRESSION; DISTAL ENHANCER; CPG ISLANDS; DNA; ZEBRAFISH; SEQUENCE;
ELEMENTS
AB Clustering of multiple transcription factor binding sites (TFBSs) for the same transcription factor (TF) is a common feature of cis-regulatory modules in invertebrate animals, but the occurrence of such homotypic clusters of TFBSs (HCTs) in the human genome has remained largely unknown. To explore whether HCTs are also common in human and other vertebrates, we used known binding motifs for vertebrate TFs and a hidden Markov model-based approach to detect HCTs in the human, mouse, chicken, and fugu genomes, and examined their association with cis-regulatory modules. We found that evolutionarily conserved HCTs occupy nearly 2% of the human genome, with experimental evidence for individual TFs supporting their binding to predicted HCTs. More than half of the promoters of human genes contain HCTs, with a distribution around the transcription start site in agreement with the experimental data from the ENCODE project. In addition, almost half of the 487 experimentally validated developmental enhancers contain them as well-a number more than 25-fold larger than expected by chance. We also found evidence of negative selection acting on TFBSs within HCTs, as the conservation of TFBSs is stronger than the conservation of sequences separating them. The important role of HCTs as components of developmental enhancers is additionally supported by a strong correlation between HCTs and the binding of the enhancer-associated coactivator protein Ep300 (also known as p300). Experimental validation of HCT-containing elements in both zebrafish and mouse suggest that HCTs could be used to predict both the presence of enhancers and their tissue specificity, and are thus a feature that can be effectively used in deciphering the gene regulatory code. In conclusion, our results indicate that HCTs are a pervasive feature of human cis-regulatory modules and suggest that they play an
C1 [Gotea, Valer; Ovcharenko, Ivan] NIH, Natl Ctr Biotechnol Informat, Natl Lib Med, Bethesda, MD 20894 USA.
[Visel, Axel; Pennacchio, Len A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Genom Div, Berkeley, CA 94720 USA.
[Visel, Axel; Pennacchio, Len A.] US DOE, Joint Genome Inst, Walnut Creek, CA 94598 USA.
[Westlund, John M.; Nobrega, Marcelo A.] Univ Chicago, Dept Human Genet, Chicago, IL 60637 USA.
RP Ovcharenko, I (reprint author), NIH, Natl Ctr Biotechnol Informat, Natl Lib Med, Bethesda, MD 20894 USA.
EM ovcharen@nih.gov
RI Visel, Axel/A-9398-2009;
OI Visel, Axel/0000-0002-4130-7784; Gotea, Valer/0000-0001-7857-3309
FU National Institutes of Health [HG004428]; National Library of Medicine;
National Human Genome Research Institute [HG003988]; National Heart,
Lung and Blood Institute [HL088393, HL066681]; Department of Energy
[DE-AC02-05CH11231]; University of California; E.O. Lawrence Berkeley
National Laboratory
FX This research was supported by the Intramural Research Program of the
National Institutes of Health; National Library of Medicine (V.G.,
I.O.); National Institutes of Health grants HG004428 (National Human
Genome Research Institute) and HL088393 (National Heart, Lung and Blood
Institute) (M.A.N., J.M.W.); and the Department of Energy Contract
DE-AC02-05CH11231, University of California, E.O. Lawrence Berkeley
National Laboratory (A.V., L.A.P.). L.A.P. was also supported by grant
HL066681, Berkeley-Program for Genomic Applications, under the Programs
for Genomic Applications, funded by the National Heart, Lung and Blood
Institute, and HG003988 funded by the National Human Genome Research
Institute.
NR 75
TC 110
Z9 110
U1 1
U2 6
PU COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
PI COLD SPRING HARBOR
PA 1 BUNGTOWN RD, COLD SPRING HARBOR, NY 11724 USA
SN 1088-9051
J9 GENOME RES
JI Genome Res.
PD MAY
PY 2010
VL 20
IS 5
BP 565
EP 577
DI 10.1101/gr.104471.109
PG 13
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
Genetics & Heredity
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
Genetics & Heredity
GA 590RK
UT WOS:000277244800003
PM 20363979
ER
PT J
AU Kirk, MF
Roden, EE
Crossey, LJ
Brearley, AJ
Spilde, MN
AF Kirk, Matthew F.
Roden, Eric E.
Crossey, Laura J.
Brearley, Adrian J.
Spilde, Michael N.
TI Experimental analysis of arsenic precipitation during microbial sulfate
and iron reduction in model aquifer sediment reactors
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID ANOXIC MARINE-SEDIMENTS; 125 DEGREES-C; PYRITE FORMATION; DISORDERED
MACKINAWITE; REDUCING BACTERIA; AQUEOUS-SOLUTIONS; REDOX CONDITIONS;
SULFIDIC WATERS; DRINKING-WATER; TRACE-ELEMENTS
AB Microbial SO(4)(2-) reduction limits accumulation of aqueous As in reducing aquifers where the sulfide that is produced forms minerals that sequester As. We examined the potential for As partitioning into As- and Fe-sulfide minerals in anaerobic, semi-continuous flow bioreactors inoculated with 0.5% (g mL(-1)) fine-grained alluvial aquifer sediment. A fluid residence time of three weeks was maintained over a ca. 300-d incubation period by replacing one-third of the aqueous phase volume of the reactors with fresh medium every seven days. The medium had a composition comparable to natural As-contaminated groundwater with slightly basic pH (7.3) and 7.5 mu M aqueous As(V) and also contained 0.8 mM acetate to stimulate microbial activity. Medium was delivered to a reactor system with and without 10 mmol L(-1) synthetic goethite (alpha-FeOOH). In both reactors, influent As(V) was almost completely reduced to As(III). Pure As-sulfide minerals did not form in the Fe-limited reactor. Realgar (As(4)S(4)) and As(2)S(3)(am) were undersaturated throughout the experiment. Orpiment (As(2)S(3)) was saturated while sulfide content was low (similar to 50 to 150 mu M), but precipitation was likely limited by slow kinetics. Reaction-path modeling suggests that, even if these minerals had formed, the dissolved As content of the reactor would have remained at hazardous levels. Mackinawite (Fe(1 + x)S; x <= 0.07) formed readily in the Fe-bearing reactor and held dissolved sulfide at levels below saturation for orpiment and realgar. The mackinawite sequestered little As (<0.1 wt.%), however, and aqueous As accumulated to levels above the influent concentration as microbial Fe(III) reduction consumed goethite and mobilized adsorbed As. A relatively small amount of pyrite (FeS(2)) and greigite (Fe(3)S(4)) formed in the Fe-bearing reactor when we injected a polysulfide solution (Na(2)S(4)) to a final concentration of 0.5 mM after 216, 230, 279, and 286 days. The pyrite, and to a lesser extent the greigite, that formed did sequester As from solution, containing 0.84 and 0.23 wt.% As on average, respectively. Our results suggest that As precipitation during Fe-sulfide formation in nature occurs mainly in conjunction with pyrite formation. Our findings imply that the effectiveness of stimulating microbial SO(4)(2-) reduction to remediate As contamination may be limited by the rate and extent of pyrite formation and the solubility of As-sulfides. (C) 2010 Elsevier Ltd. All rights reserved.
C1 [Kirk, Matthew F.; Crossey, Laura J.; Brearley, Adrian J.; Spilde, Michael N.] Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA.
[Roden, Eric E.] Univ Wisconsin, Dept Geol & Geophys, Madison, WI 53706 USA.
RP Kirk, MF (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM matthew.f.kirk@gmail.com
RI Crossey, Laura/C-2033-2008; 张, 楠/B-1010-2010; Kirk, Matthew/A-3274-2013
OI Crossey, Laura/0000-0001-6237-8023;
FU New Mexico Water Resources Research Institute; Geological Society of
America; University of New Mexico; NSF-IGERT [DGE-9972810]; NSF; NASA;
State of New Mexico
FX We are grateful for assistance from Qusheng Jin, Abdul-Mehdi Ali,
Johanna Blake, Kim Guigliotta, Tobias Fischer, and Evgenya Shelobolina.
We thank Cristina Takacs-Vesbach, Clifford Dahm, Gary Smith, R.T.
Wilkin, and three anonymous reviewers for helpful discussions and
reviews. This research was funded by student research awards from the
New Mexico Water Resources Research Institute, the Geological Society of
America, and the University of New Mexico. Support was also contributed
by an NSF-IGERT award (DGE-9972810). Electron microscopy was performed
in the Electron Microbeam Analysis Facility at the University of New
Mexico, a facility funded by NSF, NASA and the State of New Mexico.
NR 82
TC 59
Z9 63
U1 9
U2 69
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0016-7037
J9 GEOCHIM COSMOCHIM AC
JI Geochim. Cosmochim. Acta
PD MAY 1
PY 2010
VL 74
IS 9
BP 2538
EP 2555
DI 10.1016/j.gca.2010.02.002
PG 18
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 581AZ
UT WOS:000276493900002
ER
PT J
AU Pierce, EM
Reed, LR
Shaw, WJ
McGrail, BP
Icenhower, JP
Windisch, CF
Cordova, EA
Broady, J
AF Pierce, E. M.
Reed, L. R.
Shaw, W. J.
McGrail, B. P.
Icenhower, J. P.
Windisch, C. F.
Cordova, E. A.
Broady, J.
TI Experimental determination of the effect of the ratio of B/Al on glass
dissolution along the nepheline (NaAlSiO4)-malinkoite (NaBSiO4) join
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID NUCLEAR-MAGNETIC-RESONANCE; HIGH-RESOLUTION B-11; SODIUM BOROSILICATE
GLASSES; FLOW-THROUGH EXPERIMENTS; SIMULATED WASTE GLASS; SI-29 MAS-NMR;
SILICATE-GLASSES; BORATE GLASSES; ALUMINOSILICATE GLASSES;
RAMAN-SPECTROSCOPY
AB The dissolution kinetics of five glasses along the NaAlSiO4-NaBSiO4 join were used to evaluate how the structural variations associated with boron aluminum substitution affect the rate of dissolution. The composition of each glass varied inversely in mol% of Al2O3 (5-25 mol%) and B2O3 (20-0 mol%) with Na2O (25 mol%) and SiO2 (50 mol%) making up the remaining amount, in every case Na/(Al + B) = 1.0. Single-pass flow-through experiments (SPFT) were conducted under dilute conditions as a function of solution pH (from 7.0 to 12.0) and temperature (from 23 to 90 degrees C). Analysis of unreacted glass samples by Al-27 and Si-29 MAS-NMR suggests Al (similar to 98% Al-[4]) and Si-atoms (similar to 100% Si-[4]) occupy a tetrahedral coordination whereas. B-atoms occupy both tetrahedral (B-[4]) and trigonal (B-[3]) coordination. The distribution of B-[3] fractionated between B-[3](ring) and B-[3](non-ring) moieties, with the B-[3](ring)/B-[3](non-ring) ratio increases with an increase in the B/Al ratio. The MAS-NMR results also indicated an increase in the fraction of B-[4] with an increase in the B/Al ratio. The Al-27 peak maxima shift to lesser values with an increase in the B/Al ratio which suggests mixing between the Al-[4] and B-[3] sites, assuming avoidance between tetrahedral trivalent cations (Al-[4]-O-B-[4] avoidance). Unlike the Al-27 and B-11 spectra, the Si-29 spectra illustrate a subtle shift to more negative chemical shift (chemical shift range between 88 and 84 ppm) and increases in the spectral widths as the B/Al ratio increases. Raman spectroscopy of unreacted glass samples was also used to cross-check the results collected from MAS-NMR and suggested that NeB4 (the glass sample with the highest B content) may consist of B-Na enriched and Al Si enriched micro-domains, which affected the measured dissolution rates. Results from SPFT experiments suggest a forward rate of reaction and pH power-law coefficients, eta, that are independent of B/AI under these neutral to alkaline test conditions for all homogeneous glasses. The temperature dependence shows an order of magnitude increase in the dissolution rate with a 67 degrees C increase in temperature and suggests dissolution is controlled by a surface-mediated reaction, as indicated by the activation energy, E-a, being between 44 +/- 8 and 48 +/- 7 kJ/mol. Forward dissolution rates, based on Na and Si release, for homogeneous glasses are independent of the B/Al ratio, whereas dissolution rates based on Al and B release are not. Normalized dissolution rates, based on B release, increase with the molar fraction of B-[3](ring). Finally in accord with previous studies, the data discussed in this manuscript suggest rupture of either the Al-O or Si-O bonds as the rate-limiting step controlling the dissolution of these glasses. (C) 2009 Elsevier Ltd. All rights reserved.
C1 [Pierce, E. M.; Reed, L. R.; McGrail, B. P.; Icenhower, J. P.; Cordova, E. A.; Broady, J.] Pacific NW Natl Lab, Energy & Environm Directorate, Richland, WA 99354 USA.
[Shaw, W. J.; Windisch, C. F.] Pacific NW Natl Lab, Fundamental & Computat Sci Directorate, Richland, WA 99354 USA.
RP Pierce, EM (reprint author), Pacific NW Natl Lab, Energy & Environm Directorate, POB 999,MS K3-62, Richland, WA 99354 USA.
EM Eric.Pierce@pnl.gov
RI Icenhower, Jonathan/E-8523-2011; Pierce, Eric/G-1615-2011
OI Pierce, Eric/0000-0002-4951-1931
FU Department of Energy [DE-AC05-76RL01830]; Summer Research Apprenticeship
Program; U.S. Department of Energy's (DOE) Office of Science and
Technology [42400]; DOE's Office of Biological and Environmental
Research
FX The authors would like to extend a special thanks to Jonathan Stebbins
for his insightful comments on an earlier version of this manuscript.
The authors would like to express gratitude to S. R. Baum, of Pacific
Northwest National Laboratory (PNNL), for providing high quality
analytical data from sample solutions. We also thank J.L. Steele (PNNL)
and J.V. Crum (PNNL) for their assistance with various aspects of this
work. L.R. Reed, and J. Broady acknowledge the student funding obtained
from the Department of Energy's Community College Initiative Program and
the Summer Research Apprenticeship Program, respectively, being
administered at PNNL. This work was supported by the U.S. Department of
Energy's (DOE) Office of Science and Technology under the Environmental
Management Science Program (proposal number 42400). The authors
acknowledge W.J. Shaw, J.J. Ford, S.D. Burton, and J.A. Sears for
providing instrument time and helping with the collection of MAS-NMR
spectra and C.F. Windisch for collecting the Raman spectra. A portion of
this research was performed in part with the Nuclear Magnetic Resonance
Spectrometers in the William R. Wiley Environmental Molecular Sciences
Laboratory, a national scientific user facility sponsored by the DOE's
Office of Biological and Environmental Research and located at PNNL.
PNNL is operated by Battelle for the DOE under Contract
DE-AC05-76RL01830.
NR 106
TC 26
Z9 28
U1 3
U2 30
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0016-7037
J9 GEOCHIM COSMOCHIM AC
JI Geochim. Cosmochim. Acta
PD MAY 1
PY 2010
VL 74
IS 9
BP 2634
EP 2654
DI 10.1016/j.gca.2009.09.006
PG 21
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 581AZ
UT WOS:000276493900007
ER
PT J
AU Denli, H
Huang, LJ
AF Denli, Huseyin
Huang, Lianjie
TI Elastic-wave sensitivity propagation
SO GEOPHYSICS
LA English
DT Article
ID LAPSE SEISMIC DATA
AB Effective and reliable reservoir monitoring is critically important for optimizing oil/gas production and ensuring safe geologic carbon sequestration. It requires an optimal sensor deployment that uses a minimum number of sensors to record the most significant information resulting from reservoir property changes. Conventional monitoring survey designs are typically based on seismic-wavefield illumination analyses, which cannot alone determine the best receiver locations for effective and reliable monitoring of reservoir property changes. We propose a new approach for designing seismic monitoring surveys by analyzing the sensitivities of elastic waves with respect to reservoir geophysical property changes. The method is based on differentiating the elastic-wave equations with respect to geophysical parameters. The resulting sensitivity equations are solved simultaneously with the elastic-wave equations using a finite-difference scheme. Numerical studies confirm that time-lapse seismic survey designs based on elastic-wave sensitivity analysis can be totally different from those based on elastic-wavefield illuminations. For time-lapse seismic monitoring, receivers should be placed at locations where elastic-wave sensitivities are significant. Modeling of elastic-wave sensitivity propagation provides a fundamental tool for effective seismic monitoring survey designs.
C1 [Denli, Huseyin; Huang, Lianjie] Los Alamos Natl Lab, Geophys Grp, Los Alamos, NM USA.
EM huseyindenli@gmail.com; ljh@lanl.gov
FU U.S. Department of Energy [DE-AC52-06NA25396]
FX This work was supported by the U.S. Department of Energy through
contract DE-AC52-06NA25396 to Los Alamos National Laboratory. We thank
the editor Vladimir Grechka, associate editor Miguel Bosch, reviewers
Jesper Spetzler and Milagrosa Aldana, and two anonymous reviewers for
their valuable comments.
NR 29
TC 4
Z9 4
U1 0
U2 1
PU SOC EXPLORATION GEOPHYSICISTS
PI TULSA
PA 8801 S YALE ST, TULSA, OK 74137 USA
SN 0016-8033
J9 GEOPHYSICS
JI Geophysics
PD MAY-JUN
PY 2010
VL 75
IS 3
BP T83
EP T97
DI 10.1190/1.3428403
PG 15
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 612HI
UT WOS:000278887000047
ER
PT J
AU Ciais, P
Paris, JD
Marland, G
Peylin, P
Piao, SL
Levin, I
Pregger, T
Scholz, Y
Friedrich, R
Rivier, L
Houwelling, S
Schulze, ED
AF Ciais, P.
Paris, J. D.
Marland, G.
Peylin, P.
Piao, S. L.
Levin, I.
Pregger, T.
Scholz, Y.
Friedrich, R.
Rivier, L.
Houwelling, S.
Schulze, E. D.
CA CARBOEUROPE Synth Team
TI The European carbon balance. Part 1: fossil fuel emissions
SO GLOBAL CHANGE BIOLOGY
LA English
DT Article
DE emission uncertainties; EU-25; fossil-fuel
ID DIOXIDE EMISSIONS; CO2; CONSUMPTION; (CO2)-C-14; INVENTORY
AB We analyzed the magnitude, the trends and the uncertainties of fossil-fuel CO(2) emissions in the European Union 25 member states (hereafter EU-25), based on emission inventories from energy-use statistics. The stability of emissions during the past decade at EU-25 scale masks decreasing trends in some regions, offset by increasing trends elsewhere. In the recent 4 years, the new Eastern EU-25 member states have experienced an increase in emissions, reversing after a decade-long decreasing trend. Mediterranean and Nordic countries have also experienced a strong acceleration in emissions. In Germany, France and United Kingdom, the stability of emissions is due to the decrease in the industry sector, offset by an increase in the transportation sector. When four different inventories models are compared, we show that the between-models uncertainty is as large as 19% of the mean for EU-25, and even bigger for individual countries. Accurate accounting for fossil CO(2) emissions depends on a clear understanding of system boundaries, i.e. emitting activities included in the accounting. We found that the largest source of errors between inventories is the use of distinct systems boundaries (e.g. counting or not bunker fuels, cement manufacturing, nonenergy products). Once these inconsistencies are corrected, the between-models uncertainty can be reduced down to 7% at EU-25 scale. The uncertainty of emissions at smaller spatial scales than the country scale was analyzed by comparing two emission maps based upon distinct economic and demographic activities. A number of spatial and temporal biases have been found among the two maps, indicating a significant increase in uncertainties when increasing the resolution at scales finer than approximate to 200 km. At 100 km resolution, for example, the uncertainty of regional emissions is estimated to be 60 g C m-2 yr-1, up to 50% of the mean. The uncertainty on regional fossil-fuel CO(2) fluxes to the atmosphere could be reduced by making accurate 14C measurements in atmospheric CO(2), and by combining them with transport models.
C1 [Ciais, P.; Paris, J. D.; Peylin, P.; Piao, S. L.; Rivier, L.] CEA, CNRS, UVSQ, Lab Sci Climat & Environm, F-91191 Gif Sur Yvette, France.
[Marland, G.] Oak Ridge Natl Lab, Carbon Dioxide Informat Anal Ctr, Oak Ridge, TN 37831 USA.
[Marland, G.] Int Inst Appl Syst Anal, A-2360 Laxenburg, Austria.
[Levin, I.] Univ Heidelberg, Inst Umweltphys, D-69120 Heidelberg, Germany.
[Pregger, T.; Scholz, Y.; Friedrich, R.] Univ Stuttgart, Inst Energy Econ & Rat Use Energy IER, Dept Technol Assessment & Environm TFU, D-70565 Stuttgart, Germany.
[Houwelling, S.] Natl Inst Space Res, Utrecht, Netherlands.
[Schulze, E. D.] Max Planck Inst Biogeochem, D-07745 Jena, Germany.
RP Ciais, P (reprint author), CEA, CNRS, UVSQ, Lab Sci Climat & Environm, F-91191 Gif Sur Yvette, France.
EM philippe.ciais@lsce.ipsl.fr
RI Schulze, Ernst-Detlef/K-9627-2014; Vuichard, Nicolas/A-6629-2011
NR 36
TC 37
Z9 38
U1 1
U2 42
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1354-1013
J9 GLOBAL CHANGE BIOL
JI Glob. Change Biol.
PD MAY
PY 2010
VL 16
IS 5
BP 1395
EP 1408
DI 10.1111/j.1365-2486.2009.02098.x
PG 14
WC Biodiversity Conservation; Ecology; Environmental Sciences
SC Biodiversity & Conservation; Environmental Sciences & Ecology
GA 583RG
UT WOS:000276696100001
ER
PT J
AU Justus, AL
AF Justus, Alan L.
TI DERIVATION OF CONTINUOUS AIR MONITOR EQUATIONS FOR DAC AND DAC-H
SO HEALTH PHYSICS
LA English
DT Article
DE monitoring, air; radioactivity, airborne; instruments; plutonium
AB Equations are derived that provide the numerical algorithms necessary for the calculations of both concentration (such as #DAC) and exposure (such as #DAC-h) within continuous air monitors (CAMs) employing collection media. Both calculations utilize measured counts over certain CAM counting intervals. The relationship to similar, although oft misinterpreted, equations given in International Organization for Standardization Standard 11929-5: 2005 is detailed. Health Phys. 98(5):735-740; 2010
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Justus, AL (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM ajustus@lanl.gov
FU U.S. Department of Energy [DE-AC52-06NA25396]
FX This work has been authored by an employee of Los Alamos National
Security, LLC, operator of the Los Alamos National Laboratory under
Contract No. DE-AC52-06NA25396 with the U.S. Department of Energy. The
United States Government retains and the publisher, by accepting this
work for publication, acknowledges that the United States Government
retains a nonexclusive, paid-up, irrevocable, world-wide license to
publish or reproduce this work, or allow others to do so for United
States Government purposes.
NR 3
TC 1
Z9 1
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0017-9078
EI 1538-5159
J9 HEALTH PHYS
JI Health Phys.
PD MAY
PY 2010
VL 98
IS 5
BP 735
EP 740
DI 10.1097/HP.0b013e3181cf71f1
PG 6
WC Environmental Sciences; Public, Environmental & Occupational Health;
Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical
Imaging
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health; Nuclear Science & Technology; Radiology, Nuclear Medicine &
Medical Imaging
GA 583HA
UT WOS:000276663300008
PM 20386203
ER
PT J
AU Sherman, MH
Walker, IS
AF Sherman, Max H.
Walker, Iain S.
TI Impacts of Mixing on Acceptable Indoor Air Quality in Homes
SO HVAC&R RESEARCH
LA English
DT Article
AB Ventilation reduces occupant exposure to indoor contaminants by diluting or removing them. In a multizone environment, such as a house, every zone will have different dilution rates and contaminant source strengths. The total ventilation rate is the most important factor in determining occupant exposure to given contaminant sources, but the zone-specific distribution of exhaust and supply air and the mixing of ventilation air can play significant roles. Different types of ventilation systems will provide different amounts of mixing depending on several factors, such as air leakage, air distribution system, and contaminant source and occupant locations. Most US and Canadian homes have central forced-air heating, ventilation, and air-conditioning systems, which tend to mix the air; thus, the indoor air in different zones tends to he well mixed fir significant fractions of the year. This article reports recent results of investigations to determine the impact of air mixing on exposures of residential occupants to prototypical contaminants of concern. We summarize existing literature and extend past analyses to determine the parameters that affect air mixing as well as the impacts of mixing on occupant exposure, and draw conclusions that are relevant for standards development and for practitioners designing and installing home ventilation systems. The primary conclusion is that mixing will not substantially affect the mean indoor air quality across a broad population of occupants, homes, and ventilation systems, but it can reduce the number of occupants who are exposed to extreme pollutant levels. If the policy objective is to minimize the number of people exposed above a given pollutant threshold, some amount of mixing will be of net benefit even though it does not benefit average exposure. If the policy is to minimize exposure on average, then mixing air in homes is detrimental and should not be encouraged. We also conclude that most homes in the US have adequate mixing already, but that new, high-performance homes may require additional mixing. Also, our results suggest that some differentiation should be made in policies and standards for systems that provide continuous exhaust, thereby reducing relative dose for occupants overall.
C1 [Sherman, Max H.; Walker, Iain S.] Univ Calif Berkeley, Lawrence Berkeley Lab, Indoor Environm Dept, Energy Performance Bldg Grp, Berkeley, CA 94720 USA.
RP Sherman, MH (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Indoor Environm Dept, Energy Performance Bldg Grp, Berkeley, CA 94720 USA.
FU Assistant Secretary for Energy Efficiency and Renewable Energy, Office
of the Building Technologies Program, U.S. Department of Energy
[DE-AC02-05CH11231]
FX This work was supported by the Assistant Secretary for Energy Efficiency
and Renewable Energy, Office of the Building Technologies Program, U.S.
Department of Energy, under Contract No. DE-AC02-05CH11231.
NR 27
TC 0
Z9 0
U1 0
U2 6
PU AMER SOC HEATING REFRIGERATING AIR-CONDITIONING ENG, INC,
PI ATLANTA
PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 USA
SN 1078-9669
J9 HVAC&R RES
JI HVAC&R Res.
PD MAY
PY 2010
VL 16
IS 3
BP 315
EP 329
DI 10.1080/10789669.2010.10390907
PG 15
WC Thermodynamics; Construction & Building Technology; Engineering,
Mechanical
SC Thermodynamics; Construction & Building Technology; Engineering
GA 598VB
UT WOS:000277866000005
ER
PT J
AU Dai, ZX
Keating, E
Gable, C
Levitt, D
Heikoop, J
Simmons, A
AF Dai, Zhenxue
Keating, Elizabeth
Gable, Carl
Levitt, Daniel
Heikoop, Jeff
Simmons, Ardyth
TI Stepwise inversion of a groundwater flow model with multi-scale
observation data
SO HYDROGEOLOGY JOURNAL
LA English
DT Article
DE Stepwise inversion; Hydrofacies; Multi-scale data; Parameter
sensitivity; Joint inversion; USA
ID MULTICOMPONENT REACTIVE TRANSPORT; PAJARITO PLATEAU;
PARAMETER-IDENTIFICATION; NEW-MEXICO; AQUIFER; HYDROLOGY; SYSTEMS;
BENEATH; FLUXES; BASIN
AB Based on the regional hydrogeology and the stratigraphy beneath the Los Alamos National Laboratory (LANL) site, New Mexico (USA), a site-scale groundwater model has been built with more than 20 stratified hydrofacies. A stepwise inverse method was developed to estimate permeabilities for these hydrofacies by coupling observation data from different sources and at various spatial scales including single-well test, multiple-well pumping test and regional aquifer monitoring data. Statistical analyses of outcrop permeability measurements and single-well test results were used to define the prior distributions of the parameters. These distributions were used to define the parameter initial values and the lower and upper bounds for inverse modeling. A number of inverse modeling steps were performed including the use of drawdown data from the pump tests at two wells (PM-2 and PM-4) separately, and a joint inversion coupling PM-2 and PM-4 pump test data and head data from regional aquifer monitoring. Parameter sensitivity coefficients for different data sets were computed to analyze if the model parameters can be estimated accurately with the data provided at different steps. The joint inversion offers a reasonable fit to all data sets. The uncertainty of estimated parameters for the hydrofacies is addressed with the parameter confidence intervals.
C1 [Dai, Zhenxue; Keating, Elizabeth; Gable, Carl; Levitt, Daniel; Heikoop, Jeff; Simmons, Ardyth] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
RP Dai, ZX (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, EES-16,T003, Los Alamos, NM 87545 USA.
EM daiz@lanl.gov
RI Keating, Elizabeth/B-4678-2011; Heikoop, Jeffrey/C-1163-2011; Gable,
Carl/B-4689-2011;
OI Heikoop, Jeffrey/0000-0001-7648-3385; Dai, Zhenxue/0000-0002-0805-7621;
Gable, Carl/0000-0001-7063-0815
NR 44
TC 11
Z9 11
U1 1
U2 14
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1431-2174
J9 HYDROGEOL J
JI Hydrogeol. J.
PD MAY
PY 2010
VL 18
IS 3
BP 607
EP 624
DI 10.1007/s10040-009-0543-y
PG 18
WC Geosciences, Multidisciplinary; Water Resources
SC Geology; Water Resources
GA 583WM
UT WOS:000276710800005
ER
PT J
AU Esmaeili, M
Xu, F
Ghani, N
Xie, C
Peng, M
Liu, Q
AF Esmaeili, M.
Xu, F.
Ghani, N.
Xie, C.
Peng, M.
Liu, Q.
TI Enhanced Crankback for Lightpath Setup in Multi-Domain Optical Networks
SO IEEE COMMUNICATIONS LETTERS
LA English
DT Article
DE Multi-domain optical networks; crankback
AB This paper proposes a novel crankback scheme for routing and wavelength assignment across domains. The scheme leverages existing routing state and provides mechanisms to track signaling setup failures and limit overheads and delays.
C1 [Esmaeili, M.; Xu, F.; Ghani, N.; Xie, C.] Univ New Mexico, ECE Dept, Albuquerque, NM 87131 USA.
[Peng, M.] Wuhan Univ, CS Dept, Wuhan 430072, Peoples R China.
[Liu, Q.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
RP Esmaeili, M (reprint author), Univ New Mexico, ECE Dept, Albuquerque, NM 87131 USA.
EM nghani@ece.unm.edu
FU NSF; NSF and DOE
FX This work was supported by the NSF and DOE.
NR 6
TC 1
Z9 1
U1 0
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1089-7798
J9 IEEE COMMUN LETT
JI IEEE Commun. Lett.
PD MAY
PY 2010
VL 14
IS 5
BP 480
EP 482
DI 10.1109/LCOMM.2010.05.092269
PG 3
WC Telecommunications
SC Telecommunications
GA 591XP
UT WOS:000277339100038
ER
PT J
AU Ahrens, J
Shen, HW
AF Ahrens, James
Shen, Han-Wei
TI Ultrascale Visualization
SO IEEE COMPUTER GRAPHICS AND APPLICATIONS
LA English
DT Article
C1 [Ahrens, James] Los Alamos Natl Lab, Comp Sci High Performance Comp Grp, Los Alamos, NM 87545 USA.
[Shen, Han-Wei] Ohio State Univ, Dept Comp Sci & Engn, Columbus, OH 43210 USA.
RP Ahrens, J (reprint author), Los Alamos Natl Lab, Comp Sci High Performance Comp Grp, Los Alamos, NM 87545 USA.
EM ahrens@lanl.gov; hwshen@cse.ohio-state.edu
RI Shen, Han-wei/A-4710-2012
NR 0
TC 0
Z9 0
U1 0
U2 3
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 0272-1716
J9 IEEE COMPUT GRAPH
JI IEEE Comput. Graph. Appl.
PD MAY-JUN
PY 2010
VL 30
IS 3
BP 20
EP 21
PG 2
WC Computer Science, Software Engineering
SC Computer Science
GA 591QD
UT WOS:000277315900005
ER
PT J
AU Childs, H
Pugmire, D
Ahern, S
Whitlock, B
Howison, M
Prabhat
Weber, GH
Bethel, EW
AF Childs, Hank
Pugmire, David
Ahern, Sean
Whitlock, Brad
Howison, Mark
Prabhat
Weber, Gunther H.
Bethel, E. Wes
TI Extreme Scaling of Production Visualization Software on Diverse
Architectures
SO IEEE COMPUTER GRAPHICS AND APPLICATIONS
LA English
DT Article
C1 [Childs, Hank; Howison, Mark; Prabhat] Lawrence Berkeley Natl Lab, Visualizat Group, Berkeley, CA 94720 USA.
[Pugmire, David] Oak Ridge Natl Lab, Sch Comp Grp, Oak Ridge, TN USA.
[Whitlock, Brad] Lawrence Livermore Natl Lab, Livermore, CA USA.
RP Childs, H (reprint author), Lawrence Berkeley Natl Lab, Visualizat Group, Berkeley, CA 94720 USA.
EM hchilds@lbl.gov; pugmire@ornl.gov; ahern@ornl.gov; whitlock2@llnl.gov;
mhowison@lbl.gov; prabhat@lbl.gov; ghweber@lbl.gov; ewbethel@lbl.gov
OI Howison, Mark/0000-0002-0764-4090; Weber, Gunther/0000-0002-1794-1398
FU Office of Advanced Scientific Computing Research, Office of Science, of
the US Department of Energy (DOE) [DE-AC02-05CH11231]; National Energy
Research Scientific Computing Center (NERSC); Livermore Computing Center
at Lawrence Livermore National Laboratory (LLNL); US DOE National
Nuclear Security Administration [DE-AC52-07NA27344]; US DOE Office of
Science [De-AC05-00OR22725]; Texas Advanced Computing Center (TACC) at
the University of Texas at Austin
FX This work was supported by the Director, Office of Advanced Scientific
Computing Research, Office of Science, of the US Department of Energy
(DOE) under contract DE-AC02-05CH11231 through the Scientific Discovery
through Advanced Computing program's Visualization and Analytics Center
for Enabling Technologies. We thank Mark Miller for status update
improvements and the anonymous reviewers, whose suggestions greatly
improved this article. The following resources contributed to our
research results: the National Energy Research Scientific Computing
Center (NERSC), which is supported by the US DOE Office of Science under
contract DE-AC02-05CH11231; the Livermore Computing Center at Lawrence
Livermore National Laboratory (LLNL), which is supported by the US DOE
National Nuclear Security Administration under contract
DE-AC52-07NA27344; the Center for Computational Sciences at Oak Ridge
National Laboratory (ORNL), which is supported by the US DOE Office of
Science under contract De-AC05-00OR22725; and the Texas Advanced
Computing Center (TACC) at the University of Texas at Austin, which
provided HPC resources. We thank the personnel at the computing centers
that helped us perform our runs, specifically Katie Antypas, Kathy
Yelick, Francesca Verdier, and Howard Walter of NERSC; Paul Navratil;
Kelly, Gaither, and Karl Schulz of TACC; James Hack, Doug Kothe, Arthur
Bland, and Ricky Kendall of ORNL's Leadership Computing Facility; and
David Fox, Debbie Santa Maria, and Brian Carnes of LLNL's Livermore
Computing.
NR 12
TC 21
Z9 22
U1 0
U2 20
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 0272-1716
EI 1558-1756
J9 IEEE COMPUT GRAPH
JI IEEE Comput. Graph. Appl.
PD MAY-JUN
PY 2010
VL 30
IS 3
BP 22
EP 31
PG 10
WC Computer Science, Software Engineering
SC Computer Science
GA 591QD
UT WOS:000277315900006
PM 20650715
ER
PT J
AU Isenburg, M
Lindstrom, P
Childs, H
AF Isenburg, Martin
Lindstrom, Peter
Childs, Hank
TI Parallel and Streaming Generation of Ghost Data for Structured Grids
SO IEEE COMPUTER GRAPHICS AND APPLICATIONS
LA English
DT Article
C1 [Isenburg, Martin; Lindstrom, Peter] Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94550 USA.
[Childs, Hank] Lawrence Berkeley Natl Lab, Berkeley, CA USA.
RP Isenburg, M (reprint author), Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94550 USA.
EM isenburg@llnl.gov; pl@llnl.gov; hchilds@lbl.gov
FU US Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]; Office of Advanced Scientific Computing Research,
Office of Science, of the US Department of Energy [DE-AC02-05CH11231]
FX This work was performed under the auspices of the US Department of
Energy by Lawrence Livermore National Laboratory under Contract
DE-AC52-07NA27344 and was supported by the Director, Office of Advanced
Scientific Computing Research, Office of Science, of the US Department
of Energy under Contract DE-AC02-05CH11231.
NR 12
TC 2
Z9 3
U1 0
U2 0
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 0272-1716
J9 IEEE COMPUT GRAPH
JI IEEE Comput. Graph. Appl.
PD MAY-JUN
PY 2010
VL 30
IS 3
BP 32
EP 44
DI 10.1109/MCG.2010.26
PG 13
WC Computer Science, Software Engineering
SC Computer Science
GA 591QD
UT WOS:000277315900007
PM 20650716
ER
PT J
AU Yu, HF
Wang, CL
Grout, RW
Chen, JH
Ma, KL
AF Yu, Hongfeng
Wang, Chaoli
Grout, Ray W.
Chen, Jacqueline H.
Ma, Kwan-Liu
TI In Situ Visualization for Large-Scale Combustion Simulations
SO IEEE COMPUTER GRAPHICS AND APPLICATIONS
LA English
DT Article
C1 [Yu, Hongfeng; Grout, Ray W.; Chen, Jacqueline H.] Sandia Natl Labs, Livermore, CA 94550 USA.
[Wang, Chaoli] Michigan Technol Univ, Houghton, MI 49931 USA.
[Ma, Kwan-Liu] Univ Calif Davis, Grad Grp Comp Sci, Davis, CA 95616 USA.
RP Yu, HF (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
EM hyu@sandia.gov; chaoliw@mtu.edu; rwgrout@sandia.gov; jhchen@sandia.gov;
ma@cs.ucdavis.edu
FU US Department of Energy (DOE), Office of Advanced Scientific Computing
Research; DOE Basic Energy Sciences Division of Chemical Sciences,
Geosciences, and Biosciences; DOE [DE-FC02-06ER25777, DEAC04-94-AL85000,
DE-AC05-00OR22725]; US National Science Foundation [OCI-0325934,
OCI-0749217, CNS-0551727, CCF-0811422, CCF-0808896, OCI-0749227,
OCI-0950008, CCF-0938114]
FX Our research sponsors include the US Department of Energy (DOE), Office
of Advanced Scientific Computing Research; the DOE Basic Energy Sciences
Division of Chemical Sciences, Geosciences, and Biosciences; the DOE
through the Scientific Discovery through Advanced Computing program,
agreement DE-FC02-06ER25777; and the US National Science Foundation,
grants OCI-0325934, OCI-0749217, CNS-0551727, CCF-0811422, CCF-0808896,
OCI-0749227, OCI-0950008, and CCF-0938114. Sandia National Laboratories
is a multiprogram laboratory that Sandia Corp., a Lockheed Martin
Company, operates for the DOE under contract DEAC04-94-AL85000. We also
acknowledge the computing resources of the National Center for
Computational Sciences at Oak Ridge National Laboratory, which the DOE
supports under contract DE-AC05-00OR22725.
NR 28
TC 49
Z9 52
U1 0
U2 11
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 0272-1716
EI 1558-1756
J9 IEEE COMPUT GRAPH
JI IEEE Comput. Graph. Appl.
PD MAY-JUN
PY 2010
VL 30
IS 3
BP 45
EP 57
PG 13
WC Computer Science, Software Engineering
SC Computer Science
GA 591QD
UT WOS:000277315900008
PM 20650717
ER
PT J
AU Cooper, IB
Ebong, A
Renshaw, JS
Reedy, R
Al-Jassim, M
Rohatgi, A
AF Cooper, Ian B.
Ebong, Abasifreke
Renshaw, John S.
Reedy, Robert
Al-Jassim, Mowafak
Rohatgi, Ajeet
TI Understanding and Use of IR Belt Furnace for Rapid Thermal Firing of
Screen-Printed Contacts to Si Solar Cells
SO IEEE ELECTRON DEVICE LETTERS
LA English
DT Article
DE Contacts; photovoltaic cell metallization; silicon
ID RESISTANCE; EMITTERS
AB We have simulated the rapid thermal firing process using a high-throughput conveyor belt furnace to study the physics of solar cell contact formation in mass production. We show that as sinter dwell time decreases, a lower Ag finger contact resistance is observed. Scanning electron micrographs reveal a correlation between glass thickness at the Ag/Si finger interface and Ag finger contact resistance. Secondary ion mass spectrometry shows that glass-frit and Ag emitter penetration are controlled by sinter dwell time. The observed trends in contact formation lead to lower series resistance, higher fill factors, and greater efficiencies with rapid firing.
C1 [Cooper, Ian B.; Ebong, Abasifreke; Renshaw, John S.; Rohatgi, Ajeet] Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA.
[Reedy, Robert; Al-Jassim, Mowafak] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Cooper, IB (reprint author), Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA.
EM ian.cooper@gatech.edu
NR 10
TC 14
Z9 14
U1 1
U2 7
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0741-3106
J9 IEEE ELECTR DEVICE L
JI IEEE Electron Device Lett.
PD MAY
PY 2010
VL 31
IS 5
BP 461
EP 463
DI 10.1109/LED.2010.2044363
PG 3
WC Engineering, Electrical & Electronic
SC Engineering
GA 588DL
UT WOS:000277047300027
ER
PT J
AU Thresher, RW
AF Thresher, Robert W.
TI Wind Exploitation Response
SO IEEE POWER & ENERGY MAGAZINE
LA English
DT Letter
C1 Natl Renewable Energy Lab, Golden, CO USA.
RP Thresher, RW (reprint author), Natl Renewable Energy Lab, Golden, CO USA.
NR 0
TC 0
Z9 0
U1 0
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1540-7977
J9 IEEE POWER ENERGY M
JI IEEE Power Energy Mag.
PD MAY-JUN
PY 2010
VL 8
IS 3
BP 6
EP 6
PG 1
WC Engineering, Electrical & Electronic
SC Engineering
GA 588FC
UT WOS:000277052000002
ER
PT J
AU Talbot, EB
Frincke, D
Bishop, M
AF Talbot, Edward B.
Frincke, Deborah
Bishop, Matt
TI Demythifying Cybersecurity
SO IEEE SECURITY & PRIVACY
LA English
DT Article
C1 [Talbot, Edward B.] Sandia Natl Labs, Comp & Network Secur Dept, Livermore, CA 94550 USA.
[Frincke, Deborah] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Bishop, Matt] Univ Calif Davis, Dept Comp Sci, Davis, CA 95616 USA.
RP Talbot, EB (reprint author), Sandia Natl Labs, Comp & Network Secur Dept, Livermore, CA 94550 USA.
EM ebtalbo@sandia.gov; deborah.frincke@pnl.gov; bishop@cs.ucdavis.edu
NR 7
TC 1
Z9 1
U1 1
U2 3
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 1540-7993
J9 IEEE SECUR PRIV
JI IEEE Secur. Priv.
PD MAY-JUN
PY 2010
VL 8
IS 3
BP 56
EP 59
PG 4
WC Computer Science, Information Systems; Computer Science, Software
Engineering
SC Computer Science
GA 607GW
UT WOS:000278488100009
ER
PT J
AU Smith, KA
Rahn, CD
Wang, CY
AF Smith, Kandler A.
Rahn, Christopher D.
Wang, Chao-Yang
TI Model-Based Electrochemical Estimation and Constraint Management for
Pulse Operation of Lithium Ion Batteries
SO IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY
LA English
DT Article
DE Electrochemical model; lithium ion battery; model reduction; reference
governor; state-of-charge (SOC) estimation
ID PARAMETER-ESTIMATION; INSERTION CELL; REFERENCE GOVERNOR; STATE;
IMPEDANCE; CHARGE; PERFORMANCE; DISCHARGE; SYSTEMS
AB High-power lithium ion batteries are often rated with multiple current and voltage limits depending on the duration of the pulse event. These variable control limits, however, are difficult to realize in practice. In this paper, a linear Kalman filter based on a reduced order electrochemical model is designed to estimate internal battery potentials, concentration gradients, and state-of-charge (SOC) from external current and voltage measurements. A reference current governor predicts the operating margin with respect to electrode side reactions and surface depletion/saturation conditions responsible for damage and sudden loss of power. The estimates are compared with results from an experimentally validated, 1-D, nonlinear finite volume model of a 6 Ah hybrid electric vehicle battery. The linear filter provides, to within similar to 2%, performance in the 30%-70% SOC range except in the case of severe current pulses that draw electrode surface concentrations to near saturation and depletion, although the estimates recover as concentration gradients relax. With 4 to 7 states, the filter has low-order comparable to empirical equivalent circuit models commonly employed and described in the literature. Accurate estimation of the battery's internal electrochemical state enables an expanded range of pulse operation.
C1 [Smith, Kandler A.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Rahn, Christopher D.; Wang, Chao-Yang] Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA.
RP Smith, KA (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM kandlers@hotmail.com; cdrahn@psu.edu; cxw31@psu.edu
RI Wang, Chao-Yang/C-4122-2009
FU U.S. Department of Energy, Office of FreedomCAR and Vehicle
Technologies; Graduate Automotive Technology Education Program
FX Manuscript received November 18, 2006. Manuscript received in final form
June 30, 2009. First published September 22, 2009; current version
published April 23, 2010. Recommended by Associate Editor A. G.
Stefanopoulou. This work was supported by the U.S. Department of Energy,
Office of FreedomCAR and Vehicle Technologies, Graduate Automotive
Technology Education Program. This work was performed at the
Pennsylvania State University.
NR 23
TC 116
Z9 117
U1 2
U2 52
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1063-6536
J9 IEEE T CONTR SYST T
JI IEEE Trans. Control Syst. Technol.
PD MAY
PY 2010
VL 18
IS 3
BP 654
EP 663
DI 10.1109/TCST.2009.2027023
PG 10
WC Automation & Control Systems; Engineering, Electrical & Electronic
SC Automation & Control Systems; Engineering
GA 588EM
UT WOS:000277050400010
ER
PT J
AU Traff, JL
Gropp, WD
Thakur, R
AF Traff, Jesper Larsson
Gropp, William D.
Thakur, Rajeev
TI Self-Consistent MPI Performance Guidelines
SO IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS
LA English
DT Article
DE Parallel processing; message passing; message-passing interface; MPI;
performance portability; performance prediction; performance model;
public benchmarking; performance guidelines
ID COLLECTIVE COMMUNICATION; PARALLEL COMPUTATION; MODEL; PORTABILITY;
PROGRAMS
AB Message passing using the Message-Passing Interface (MPI) is at present the most widely adopted framework for programming parallel applications for distributed memory and clustered parallel systems. For reasons of ( universal) implementability, the MPI standard does not state any specific performance guarantees, but users expect MPI implementations to deliver good and consistent performance in the sense of efficient utilization of the underlying parallel (communication) system. For performance portability reasons, users also naturally desire communication optimizations performed on one parallel platform with one MPI implementation to be preserved when switching to another MPI implementation on another platform. We address the problem of ensuring performance consistency and portability by formulating performance guidelines and conditions that are desirable for good MPI implementations to fulfill. Instead of prescribing a specific performance model (which may be realistic on some systems, under some MPI protocol and algorithm assumptions, etc.), we formulate these guidelines by relating the performance of various aspects of the semantically strongly interrelated MPI standard to each other. Common-sense expectations, for instance, suggest that no MPI function should perform worse than a combination of other MPI functions that implement the same functionality, no specialized function should perform worse than a more general function that can implement the same functionality, no function with weak semantic guarantees should perform worse than a similar function with stronger semantics, and so on. Such guidelines may enable implementers to provide higher quality MPI implementations, minimize performance surprises, and eliminate the need for users to make special, nonportable optimizations by hand. We introduce and semiformalize the concept of self-consistent performance guidelines for MPI, and provide a (nonexhaustive) set of such guidelines in a form that could be automatically verified by benchmarks and experiment management tools. We present experimental results that show cases where guidelines are not satisfied in common MPI implementations, thereby indicating room for improvement in today's MPI implementations.
C1 [Traff, Jesper Larsson] Univ Vienna, Dept Comp Sci, A-1090 Vienna, Austria.
[Gropp, William D.] Univ Illinois, Dept Comp Sci, Thomas M Siebel Ctr Comp Sci, Urbana, IL 61801 USA.
[Thakur, Rajeev] Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA.
RP Traff, JL (reprint author), Univ Vienna, Dept Comp Sci, Nordbergstr 15-3C, A-1090 Vienna, Austria.
EM traff@par.univie.ac.at; wgropp@illinois.edu; thakur@mcs.anl.gov
OI Gropp, William/0000-0003-2905-3029
FU Office of Science, US Department of Energy [DE-AC02-06CH11357]
FX The ideas expounded in this paper were first introduced in [ 35],
although in a less finished form. The authors thank a number of
colleagues for, sometimes, intense discussions on these. At various
stages, the paper has benefited significantly from the comments of
anonymous reviewers, whose insightfulness, time, and effort they also
hereby gratefully acknowledge. The work was supported in part by the
Mathematical, Information, and Computational Sciences Division
subprogram of the Office of Advanced Scientific Computing Research,
Office of Science, US Department of Energy, under Contract
DE-AC02-06CH11357. J.L. Traff was with NEC Laboratories Europe while
this work was carried out.
NR 41
TC 9
Z9 10
U1 1
U2 5
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 1045-9219
J9 IEEE T PARALL DISTR
JI IEEE Trans. Parallel Distrib. Syst.
PD MAY
PY 2010
VL 21
IS 5
BP 698
EP 709
DI 10.1109/TPDS.2009.120
PG 12
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA 573VD
UT WOS:000275942500010
ER
PT J
AU Maillet, Y
Lai, RX
Wang, SO
Wang, F
Burgos, R
Boroyevich, D
AF Maillet, Yoann
Lai, Rixin
Wang, Shuo
Wang, Fei (Fred)
Burgos, Rolando
Boroyevich, Dushan
TI High-Density EMI Filter Design for DC-Fed Motor Drives
SO IEEE TRANSACTIONS ON POWER ELECTRONICS
LA English
DT Article
DE Common mode (CM); differential mode (DM); electromagnetic interference
(EMI); EMI filter; grounding; integrated filter
ID COMMON-MODE EMI; SUPPRESSION; CONVERTERS
AB This paper presents strategies to reduce both differential-mode (DM) and common-mode (CM) noise using a passive filter in a dc-fed motor drive. The paper concentrates on the type of grounding and the components to optimize filter size and performance. Grounding schemes, material comparison between ferrite and nanocrystalline cores, and a new integrated filter structure are presented. The integrated structure maximizes the core window area and increases the leakage inductance by integrating both CM and DM inductances onto one core. Small-signal and large-signal experiments validate the structure, showing it to have reduced filter size and good filtering performance when compared with standard filters at both low and high frequencies.
C1 [Maillet, Yoann] Conver Team Inc, Pittsburgh, PA 15238 USA.
[Lai, Rixin] GE Global Res Ctr, Niskayuna, NY 12309 USA.
[Wang, Shuo] GE Aviat Syst, Elect Power Syst, Vandalia, OH 45377 USA.
[Wang, Fei (Fred)] Univ Tennessee, Knoxville, TN 37996 USA.
[Wang, Fei (Fred)] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Burgos, Rolando] ABB US Corp Res Ctr, Raleigh, NC 27606 USA.
[Boroyevich, Dushan] Virginia Tech, Ctr Power Elect Syst, Blacksburg, VA 24061 USA.
RP Maillet, Y (reprint author), Conver Team Inc, Pittsburgh, PA 15238 USA.
EM yoayo@vt.edu; lairixin@vt.edu; shuowang@ieee.org; f.wang@ieee.org;
rburgos@ieee.org; dushan@vt.edu
FU SAFRAN Group; National Science Foundation (NSF) [EEC-9731677]; Center
for Power Electronics Systems (CPES)
FX Manuscript received May 30, 2009; revised August 1, 2009 and October 18,
2009. Current version published May 7, 2010. This work was supported by
SAFRAN Group, by the National Science Foundation (NSF) under NSF Award
Number EEC-9731677 and by the Center for Power Electronics Systems
(CPES) Industry Partnership Program. Recommended for publication by
Associate Editor P. Tenti.
NR 18
TC 24
Z9 24
U1 0
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0885-8993
J9 IEEE T POWER ELECTR
JI IEEE Trans. Power Electron.
PD MAY
PY 2010
VL 25
IS 5
BP 1163
EP 1172
DI 10.1109/TPEL.2009.2039004
PG 10
WC Engineering, Electrical & Electronic
SC Engineering
GA 593ZM
UT WOS:000277501900008
ER
PT J
AU Oh, H
AF Oh, HyungSeon
TI A New Network Reduction Methodology for Power System Planning Studies
SO IEEE TRANSACTIONS ON POWER SYSTEMS
LA English
DT Article
DE Eigenvalue; eigenvector; DC power flow; factorization; power transfer
distribution factor (PTDF); transmission network reduction; ward
reduction
ID EQUIVALENTS
AB System planning on a large-scale electric power system is computationally challenging. Network reduction into a small system can significantly reduce the computational expense. The Ward equivalent technique is widely used for the reduction; however, it may not yield the same flow pattern as the original network. In this paper, a new methodology for network reduction is proposed and the results are compared with those from other methodologies.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Oh, H (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM hyungseon.oh@nrel.gov
FU U.S. Department of Energy
FX This work was supported by the U.S. Department of Energy. Paper no.
TPWRS-00413-2009.
NR 14
TC 13
Z9 14
U1 0
U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0885-8950
J9 IEEE T POWER SYST
JI IEEE Trans. Power Syst.
PD MAY
PY 2010
VL 25
IS 2
BP 677
EP 684
DI 10.1109/TPWRS.2009.2036183
PG 8
WC Engineering, Electrical & Electronic
SC Engineering
GA 691AH
UT WOS:000285051800010
ER
PT J
AU Pierre, JW
Zhou, N
Tuffner, FK
Hauer, JF
Trudnowski, DJ
Mittelstadt, WA
AF Pierre, John W.
Zhou, Ning
Tuffner, Francis K.
Hauer, John F.
Trudnowski, Daniel J.
Mittelstadt, William A.
TI Probing Signal Design for Power System Identification
SO IEEE TRANSACTIONS ON POWER SYSTEMS
LA English
DT Article
DE Identification; power system identification; power system measurements;
power system monitoring; power system parameter estimation; power system
reliability; power system testing; signal design
ID ELECTROMECHANICAL MODES; AMBIENT DATA; PERFORMANCE
AB This paper investigates the design of effective input signals for low-level probing of power systems. In 2005, 2006, and 2008 the Western Electricity Coordinating Council (WECC) conducted four large-scale system-wide tests of the western interconnected power system where probing signals were injected by modulating the control signal at the Celilo end of the Pacific DC intertie. A major objective of these tests is the accurate estimation of the inter-area electromechanical modes. A key aspect of any such test is the design of an effective probing signal that leads to measured outputs rich in information about the modes. This paper specifically studies low-level probing signal design for power-system identification. The paper describes the design methodology and the advantages of this new probing signal which was successfully applied during these tests. This probing input is a multi-sine signal with its frequency content focused in the range of the inter-area modes. The period of the signal is over 2 min providing high-frequency resolution. Up to 15 cycles of the signal are injected resulting in a processing gain of 15. The resulting system response is studied in the time and frequency domains. Because of the new probing signal characteristics, these results show significant improvement in the output SNR compared to previous tests.
C1 [Pierre, John W.] Univ Wyoming, Dept Elect & Comp Engn, Laramie, WY 82071 USA.
[Zhou, Ning; Tuffner, Francis K.; Hauer, John F.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Trudnowski, Daniel J.] Montana Tech Univ, Dept Elect Engn, Butte, MT 59701 USA.
[Mittelstadt, William A.] Bonneville Power Adm, Portland, OR 97232 USA.
RP Pierre, JW (reprint author), Univ Wyoming, Dept Elect & Comp Engn, Laramie, WY 82071 USA.
EM pierre@uwyo.edu; ning.zhou@pnl.gov; ftuffner@ieee.org;
john.hauer@pnl.gov; dtrudnowski@mtech.edu; wmittelstadt@bpa.gov
FU U.S. Department of Energy [DE-FC26-06NT42750, DE-FG02-03ER46044,
DE-AC05-76RL01830]
FX Manuscript received February 19, 2009; revised June 29, 2009. First
published November 17, 2009; current version published April 21, 2010.
This work was supported in part by the U.S. Department of Energy under
grant DE-FC26-06NT42750 and DE-FG02-03ER46044. The Pacific Northwest
National Laboratory is operated by Battelle for the U.S. Department of
Energy under Contract DE-AC05-76RL01830. Paper no. TPWRS-00128-2009.
NR 22
TC 13
Z9 13
U1 0
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0885-8950
J9 IEEE T POWER SYST
JI IEEE Trans. Power Syst.
PD MAY
PY 2010
VL 25
IS 2
BP 835
EP 843
DI 10.1109/TPWRS.2009.2033801
PG 9
WC Engineering, Electrical & Electronic
SC Engineering
GA 691AH
UT WOS:000285051800026
ER
PT J
AU Diao, RS
Vittal, V
Logic, N
AF Diao, Ruisheng
Vittal, Vijay
Logic, Naim
TI Design of a Real-Time Security Assessment Tool for Situational Awareness
Enhancement in Modern Power Systems
SO IEEE TRANSACTIONS ON POWER SYSTEMS
LA English
DT Article
DE Classification tree; decision tree; online security assessment;
preventive control; regression tree; thermal violation; transient
stability; voltage magnitude violation; voltage stability
ID DECISION TREES; TRANSIENT STABILITY
AB Detailed security analysis for N - k ontingencies (k = 1, 2, 3, ...) in a real-time setting is still a great challenge due to the significant computational burden. This paper takes advantage of phasor measurement units (PMUs) and decision trees (DTs) to develop a real-time security assessment tool to assess four important post-contingency security issues, including voltage magnitude violation (VMV), thermal limit violation (TV), voltage stability (VS) and transient stability (TS). The proposed scheme is tested on the Salt River Project (SRP) power system represented by a series of operating conditions (OCs) during a representative day. The properly trained DTs demonstrate excellent prediction performance. Robustness tests for the offline trained DTs are performed on a group of changed OCs that were not included for training the DTs and the idea of tuning critical system attributes for preventive controls is also presented to improve system security.
C1 [Logic, Naim] Salt River Project, Phoenix, AZ 85287 USA.
[Diao, Ruisheng; Vittal, Vijay] Arizona State Univ, Dept Elect Engn, Tempe, AZ 85287 USA.
RP Diao, RS (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM ruisheng.diao@asu.edu; vijay.vittal@asu.edu; Naim.Logic@srpnet.com
FU Salt River Project; Power System Engineering Research Center
FX Manuscript received July 10, 2009; revised August 31, 2009. First
published December 01, 2009; current version published April 21, 2010.
This work was supported in part by Salt River Project and in part by the
Power System Engineering Research Center. Paper no. TPWRS-00530-2009.
NR 21
TC 27
Z9 33
U1 0
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0885-8950
J9 IEEE T POWER SYST
JI IEEE Trans. Power Syst.
PD MAY
PY 2010
VL 25
IS 2
BP 957
EP 965
DI 10.1109/TPWRS.2009.2035507
PG 9
WC Engineering, Electrical & Electronic
SC Engineering
GA 691AH
UT WOS:000285051800039
ER
PT J
AU Lo, YC
Chou, HS
Cheng, YT
Huang, JC
Morris, JR
Liaw, PK
AF Lo, Y. C.
Chou, H. S.
Cheng, Y. T.
Huang, J. C.
Morris, J. R.
Liaw, P. K.
TI Structural relaxation and self-repair behavior in nano-scaled Zr-Cu
metallic glass under cyclic loading: Molecular dynamics simulations
SO INTERMETALLICS
LA English
DT Article
DE Simulations; atomistic; Glasses; metallic; Fatigue resistance and crack
growth; Plastic deformation mechanisms
ID PLASTIC-DEFORMATION; AMORPHOUS METALS; FATIGUE BEHAVIOR; BULK; ALLOYS;
TRANSITION; LIQUID; MODEL; FLOW
AB Bulk metallic glasses are generally regarded as highly brittle materials at room temperature, with deformation localized within a few principal shear bands. In this simulation work, it is demonstrated that when the Zr-Cu metallic glass is in a small size-scale, it can deform under cyclic loading in a semi-homogeneous manner without the occurrence of pronounced mature shear bands. Instead, the plastic deformation in simulated samples proceeds via the network-like shear-transition zones (STZs) by the reversible and irreversible structure-relaxations during cyclic loading. Dynamic recovery and reversible/ irreversible structure rearrangements occur in the current model, along with annihilation/creation of excessive free volumes. This behavior would in-turn retard the damage growth of metallic glass. Current studies can help to understand the structural relaxation mechanism in metallic glass under loading. The results also imply that the brittle bulk metallic glasses can become ductile with the sample size being reduced. The application of metallic glasses in the form of thin film or nano pieces in micro-electro-mechanical systems (MEMS) could be promising. (C) 2010 Elsevier Ltd. All rights reserved.
C1 [Lo, Y. C.; Chou, H. S.; Cheng, Y. T.; Huang, J. C.] Natl Sun Yat Sen Univ, Dept Mat & Optoelect Sci, Ctr Nanosci & Nanotechnol, Kaohsiung 804, Taiwan.
[Morris, J. R.; Liaw, P. K.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Morris, J. R.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Huang, JC (reprint author), Natl Sun Yat Sen Univ, Dept Mat & Optoelect Sci, Ctr Nanosci & Nanotechnol, Kaohsiung 804, Taiwan.
EM jacobc@mail.nsysu.edu.tw
RI Huang, J. /C-4276-2013; Cheng, Yu-Ting /K-7432-2013; Morris,
J/I-4452-2012
OI Morris, J/0000-0002-8464-9047
FU National Science Council of Taiwan, ROC [NSC 96-2218-E-110-001];
National Science Foundation [DMR-0231320]; Division of Materials
Sciences and Engineering, Office of Basic Energy Sciences, U.S.
Department of Energy [DE-ACO5-000R-22725]
FX The authors gratefully acknowledge the sponsorship from the National
Science Council of Taiwan, ROC, under the project no. NSC
96-2218-E-110-001. YCL would like to thank Prof. S.P. Ju for the use of
PC clusters on this calculation works, and Prof. J. Li for useful
discussions on the analysis in this paper. RC is very grateful for the
support of the National Science Foundation International Materials
Institutes (IMI) Program (DMR-0231320) with Dr. C. Huber as the Program
Director. JRM's research has been sponsored by the Division of Materials
Sciences and Engineering, Office of Basic Energy Sciences, U.S.
Department of Energy under contract with DE-ACO5-000R-22725 with the
UT-Battelle.
NR 41
TC 16
Z9 17
U1 4
U2 44
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0966-9795
J9 INTERMETALLICS
JI Intermetallics
PD MAY
PY 2010
VL 18
IS 5
BP 954
EP 960
DI 10.1016/j.intermet.2010.01.012
PG 7
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA 593WX
UT WOS:000277494400031
ER
PT J
AU Chen, XQ
Fu, CL
Morris, JR
AF Chen, Xing-Qiu
Fu, C. L.
Morris, James R.
TI The electronic, elastic, and structural properties of Ti-Pd
intermetallics and associated hydrides from first principles
calculations
SO INTERMETALLICS
LA English
DT Article
DE Elastic properties; Thermodynamic and thermochemical properties;
Hydrogen storage; Phase transformation; Ab initio calculations
ID SHAPE-MEMORY ALLOY; TOTAL-ENERGY CALCULATIONS; AUGMENTED-WAVE METHOD;
MARTENSITIC-TRANSFORMATION; ANTIPHASE BOUNDARY; TRANSITION-METALS;
CRYSTAL-STRUCTURE; PHASE-STABILITY; BASIS-SET; TEMPERATURE
AB Using an ab initio density functional approach, we report on the ground-state phase stabilities, enthalpies of formation, electronic, and elastic properties of the Ti-Pd alloy system. The calculated enthalpies of formation are in excellent agreement with available calorimetric data. We found a linear dependence between the calculated enthalpies of formation of several intermetallic structures and the Pd-concentration, indicating that each of these compounds has a very limited composition range. The elastic constants for many of these Ti-Pd intermetallics were calculated and analyzed. The B2 TiPd phase is found to be mechanically unstable with respect to the transformation into the monoclinic B19' structure. A series of hydrides, Ti(2)PdH(x) (x = 1,1.5, 2, 3, 4), have been investigated in terms of electronic structure, enthalpies of hydrogen absorption, and site preference of H atoms. Our results illustrate the physical mechanism for hydrogen absorption in term of the charge transfer, and explain why TiPd(2) does not form a stable hydride. (C) 2010 Elsevier Ltd. All rights reserved.
C1 [Chen, Xing-Qiu; Fu, C. L.; Morris, James R.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Morris, James R.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
RP Chen, XQ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110006, Peoples R China.
EM xingqiu.chen@imr.ac.cn
RI Morris, J/I-4452-2012
OI Morris, J/0000-0002-8464-9047
FU Division of Materials Sciences and Engineering, U.S. Department of
Energy
FX Research at Oak Ridge National Laboratory was sponsored by the Division
of Materials Sciences and Engineering, U.S. Department of Energy under
contract with UT-Battelle, LLC.
NR 66
TC 27
Z9 27
U1 0
U2 23
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0966-9795
J9 INTERMETALLICS
JI Intermetallics
PD MAY
PY 2010
VL 18
IS 5
BP 998
EP 1006
DI 10.1016/j.intermet.2010.01.027
PG 9
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA 593WX
UT WOS:000277494400038
ER
PT J
AU Cao, Q
Chumbley, LS
Qian, Z
AF Cao, Q.
Chumbley, L. S.
Qian, Z.
TI Thermal stability of RE5(SixGe1-x)(3) plates in RE5(SixGe1-x)(4) alloys,
where RE = Gd and Ho
SO INTERMETALLICS
LA English
DT Article
DE Rare-earth intermetallics; Heat treatment; Rapid solidification;
Electron microscopy; scanning; Electron microscopy; transmission
ID GD5SI2GE2; GD-5(SIXGE1-X)(4); IDENTIFICATION; TRANSITION; FEATURES
AB The stability of RE5(SixGe1-x)(3) plates was studied through electron microscopy examination of as-cast and annealed Gd5Ge4 single crystal samples. Thermal annealing of samples at 1200 degrees C showed instability of the plates and a sluggish dissolution into the matrix. Scanning electron microscopy of Ho-5(Si0.8Ge0.2)(4) samples that had undergone laser surface melting indicated that the resulting rapid solidification of the melt pool suppressed precipitation of the characteristic 5:3 thin plates. (C) 2010 Elsevier Ltd. All rights reserved.
C1 [Cao, Q.; Chumbley, L. S.; Qian, Z.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Cao, Q.; Chumbley, L. S.; Qian, Z.] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
RP Cao, Q (reprint author), Iowa State Univ, Ames Lab, 206 Wilhelm, Ames, IA 50011 USA.
EM qcao@iastate.edu
FU US Department of Energy [DE-AC02-07CH11358]; Office of Basic Energy
Sciences, Materials Science Division of the US DOE
FX This work was performed at Ames Laboratory under contract no.
DE-AC02-07CH11358 with the US Department of Energy. This research was
supported by the Office of Basic Energy Sciences, Materials Science
Division of the US DOE. The authors wish to thank D.L.Schlagel for
preparing the single crystals used in this study and also P. A. Molian
and his students for their help providing lasers for the rapid
solidification experiments.
NR 19
TC 4
Z9 4
U1 0
U2 4
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0966-9795
J9 INTERMETALLICS
JI Intermetallics
PD MAY
PY 2010
VL 18
IS 5
BP 1021
EP 1026
DI 10.1016/j.intermet.2010.01.037
PG 6
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA 593WX
UT WOS:000277494400041
ER
PT J
AU Janssens, KGF
Battaile, CC
Boyce, BL
Brewer, L
AF Janssens, K. G. F.
Battaile, C. C.
Boyce, B. L.
Brewer, L.
TI Papers from the 2009 TMS Annual Meeting Symposium on Mechanisms, theory,
experiments and industrial practice in fatigue
SO INTERNATIONAL JOURNAL OF FATIGUE
LA English
DT Editorial Material
C1 [Janssens, K. G. F.] Paul Scherrer Inst, Zurich, Switzerland.
[Battaile, C. C.; Boyce, B. L.; Brewer, L.] Sandia Natl Labs, Livermore, CA 94550 USA.
RP Janssens, KGF (reprint author), Paul Scherrer Inst, Zurich, Switzerland.
EM koen.janssens@psi.ch
RI Boyce, Brad/H-5045-2012; Janssens, Koenraad/A-1883-2009
OI Boyce, Brad/0000-0001-5994-1743; Janssens, Koenraad/0000-0001-9776-3431
NR 0
TC 0
Z9 0
U1 0
U2 2
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0142-1123
J9 INT J FATIGUE
JI Int. J. Fatigue
PD MAY
PY 2010
VL 32
IS 5
BP 791
EP 791
DI 10.1016/j.ijfatigue.2009.10.016
PG 1
WC Engineering, Mechanical; Materials Science, Multidisciplinary
SC Engineering; Materials Science
GA 560TW
UT WOS:000274927000001
ER
PT J
AU Thomas, JD
Triantafyllidis, N
Vivek, A
Daehn, GS
Bradley, JR
AF Thomas, J. D.
Triantafyllidis, N.
Vivek, A.
Daehn, G. S.
Bradley, J. R.
TI Comparison of fully coupled modeling and experiments for electromagnetic
forming processes in finitely strained solids
SO INTERNATIONAL JOURNAL OF FRACTURE
LA English
DT Article
DE Electromagnetics; Continuum mechanics; Variational principles;
Multiphysics; Experimental techniques
ID ALUMINUM-ALLOY SHEET; METAL; SIMULATION; VELOCITY; NECKING;
FRAGMENTATION; LOCALIZATION; VELOCIMETRY; FORMULATION; FORMABILITY
AB In fracture and fragmentation research the technique of electromagnetic forming, which uses electromagnetic (Lorentz) body forces to shape metallic parts, is finding significant use due to the high velocity, high strain rate loading it can impart without contact on workpieces. The same process is also becoming increasingly relevant for manufacturing processes in sheet metal forming, where this technique offers several advantages: speed, repeatability, non-contact loading, reduced springback and considerable ductility increase in several metals. Current modeling techniques for these coupled electromagnetic and thermomechanical processes are not based on coupled variational principles that can simultaneously account for electromagnetic and mechanical effects. Typically, separate solutions to the electromagnetic (Maxwell) and motion (Newton) equations are combined in staggered or lock-step methods, sequentially solving the mechanical and electromagnetic problems. To address this issue, Thomas and Triantafyllidis (J Mech Phys Solids 57:1391-1416, 2009) have recently introduced a fully coupled Lagrangian (reference configuration) variational principle, involving the magnetic field potential and the displacement field as independent variables. The corresponding Euler-Lagrange equations are Maxwell's and Newton's equations in the reference configuration under the eddy current approximation. This novel approach is used here to simulate free expansion experiments of AA6063-T6 aluminum tubes. A viscoplastic constitutive model, developed independently by the authors (Thomas et al. Acta Mater 55:2863-2873, 2007) for necking experiments in tubes of the same aluminum alloy, is used in the simulations. The measured electric currents and tube deformation-the latter obtained by Photon Doppler Velocimetry-show reasonably good agreement with the corresponding simulations, which are obtained using a variational integration numerical scheme that results in an efficient staggered solution algorithm.
C1 [Thomas, J. D.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Triantafyllidis, N.] Ecole Polytech, Solid Mech Lab, F-91128 Palaiseau, France.
[Triantafyllidis, N.] Ecole Polytech, Dept Mech, F-91128 Palaiseau, France.
[Triantafyllidis, N.] Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA.
[Vivek, A.; Daehn, G. S.] Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA.
[Bradley, J. R.] Gen Motors R&D Ctr, Mat & Proc Lab, Warren, MI 48090 USA.
RP Thomas, JD (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM jdthom@sandia.gov
OI Daehn, Glenn/0000-0002-5493-7902
FU National Science Foundation [CMMI 0900 007]; General Motors Research and
Development
FX The authors gratefully acknowledge support from the National Science
Foundation, grant CMMI 0900 007, and General Motors Research and
Development. The authors also acknowledge many helpful discussions with
Professor K. Ravi-Chandar of the Aerospace Engineering and Engineering
Mechanics Department at the University of Texas at Austin and Dr. Pierre
L'Eplattenier of Livermore Software Technology Corporation.
NR 41
TC 2
Z9 2
U1 0
U2 9
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0376-9429
EI 1573-2673
J9 INT J FRACTURE
JI Int. J. Fract.
PD MAY
PY 2010
VL 163
IS 1-2
SI SI
BP 67
EP 83
DI 10.1007/s10704-010-9473-x
PG 17
WC Materials Science, Multidisciplinary; Mechanics
SC Materials Science; Mechanics
GA 612JI
UT WOS:000278893500005
ER
PT J
AU Foulk, JW
Vogler, TJ
AF Foulk, James W.
Vogler, Tracy J.
TI A grain-scale study of spall in brittle materials
SO INTERNATIONAL JOURNAL OF FRACTURE
LA English
DT Article
DE Fracture mechanisms; Ceramics; Spall; Intergranular fracture; Cohesive
zone; Finite elements
ID DYNAMIC FRAGMENTATION; BOUNDARY PROPERTIES; SILICON-CARBIDE; LEVEL
ANALYSIS; FRACTURE; CERAMICS; MODEL; INTERFACE; STRENGTH;
MICROSTRUCTURES
AB The evolution of spall for a brittle material is investigated under variance of anisotropy, grain boundary fracture energy, and loading. Because spall occurs in the interior of the specimen, fundamental studies of crack nucleation and growth are needed to better understand surface velocity measurements. Within a cohesive approach to fracture, we illustrate that for anisotropic materials, increases in the fracture energy cause a transition in crack nucleation from triple-points to entire grain boundary facets. Analysis of idealized flaws reveals that while crack initiation and acceleration are strong functions of the fracture energy, flaws soon reach speeds on the order of the Rayleigh wave speed. Finally, simulated surface velocities of spalled configurations are correlated with microstructural evolution. These fundamental studies of nucleation, growth, and spall attempt to link atomic separation to the macroscopic spall strength and provide a computational framework to examine the evolution of spall and the impact on the simulated surface velocity field.
C1 [Foulk, James W.; Vogler, Tracy J.] Sandia Natl Labs, Livermore, CA 94550 USA.
RP Foulk, JW (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
EM jwfoulk@sandia.gov
FU Laboratory Directed Research and Development (LDRD) Program at Sandia
National Laboratories; United States Department of Energy
[DE-AC04-94AL85000]
FX Both authors are thankful for the numerous contributions of George Mseis
at the University of California, Berkeley, towards this effort. In
addition, we are grateful for the Laboratory Directed Research and
Development (LDRD) Program at Sandia National Laboratories which funded
this effort. Sandia is a multiprogram laboratory operated by Sandia
Corporation, a Lockheed Martin Company, for the United States Department
of Energy's National Nuclear Security Administration under contract
DE-AC04-94AL85000.
NR 40
TC 10
Z9 10
U1 2
U2 11
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0376-9429
J9 INT J FRACTURE
JI Int. J. Fract.
PD MAY
PY 2010
VL 163
IS 1-2
SI SI
BP 225
EP 242
DI 10.1007/s10704-010-9470-0
PG 18
WC Materials Science, Multidisciplinary; Mechanics
SC Materials Science; Mechanics
GA 612JI
UT WOS:000278893500015
ER
PT J
AU Gray, GT
Bourne, NK
Vecchio, KS
Millett, JCF
AF Gray, G. T., III
Bourne, N. K.
Vecchio, K. S.
Millett, J. C. F.
TI Influence of anisotropy (crystallographic and microstructural) on
spallation in Zr, Ta, HY-100 steel, and 1080 eutectoid steel
SO INTERNATIONAL JOURNAL OF FRACTURE
LA English
DT Article
DE Anisotropy; Texture; Spallation; Microstructure; Tantalum; Zirconium;
Steel
ID CYLINDER IMPACT TEST; DYNAMIC FRACTURE; STRENGTH; TANTALUM; FAILURE;
STRESS; DEFORMATION; SIMULATIONS; VALIDATION; EVOLUTION
AB The purpose of this study is to quantify the influence of textural and microstructural anisotropy on spallation. This includes the influence of anisotropically-oriented MnS inclusion stringers in the HY-100 and 1080 steels on spallation, within two crystallographically-isotropic steels, and the influence of strong, anisotropic crystallographic texture in high-purity polycrystalline Ta and Zr materials to assess the role of texture on damage evolution and spallation responses. The effect of anisotropic crystallographic texture on the spallation response of Ta and Zr is shown to play a minimal role in the spallation response of each material, as seen in wave profile pull-back signals, compared to the effect of texture on the shock arrival time and the Hugoniot elastic limit that reflects strength in these two high-purity materials. In the case of both the 1080 and HY-100 steels, the influence of elongated MnS stringers, resident within the essentially crystallographically isotropic steels, was found to be dominated by the heterogeneous nucleation of damage orthogonal to the MnS stringers. Delamination between the pearlitic matrix microstructure and the MnS stringers in the 1080 steel, or inclusions and the martensitic matrix in the HY-100 steel, was seen to correlate to a lower pull-back signal during transverse loading than to that parallel to the stringer axis in each steel.
C1 [Gray, G. T., III] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
[Bourne, N. K.; Millett, J. C. F.] AWE, Reading RG7 4PR, Berks, England.
[Vecchio, K. S.] Univ Calif San Diego, Dept NanoEngn, La Jolla, CA 92093 USA.
RP Gray, GT (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
EM rusty@lanl.gov; neil.bourne@mac.com; kvecchio@ucsd.edu;
Jeremy.Millett@awe.co.uk
RI Vecchio, Kenneth/F-6300-2011
OI Vecchio, Kenneth/0000-0003-0217-6803
FU US Department of Energy [DE-AC52-06NA25396]; DoD/DOE Munitions
FX Los Alamos National Laboratory is operated by Los Alamos National
Security, LLC, for the NNSA of the US Department of Energy under
contract DE-AC52-06NA25396. This research was supported under the
auspices of the US Department of Energy and the Joint DoD/DOE Munitions
Program.
NR 46
TC 9
Z9 9
U1 2
U2 12
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0376-9429
J9 INT J FRACTURE
JI Int. J. Fract.
PD MAY
PY 2010
VL 163
IS 1-2
SI SI
BP 243
EP 258
DI 10.1007/s10704-009-9440-6
PG 16
WC Materials Science, Multidisciplinary; Mechanics
SC Materials Science; Mechanics
GA 612JI
UT WOS:000278893500016
ER
PT J
AU Chung, J
Sternberg, P
Yang, C
AF Chung, Julianne
Sternberg, Philip
Yang, Chao
TI HIGH-PERFORMANCE THREE-DIMENSIONAL IMAGE RECONSTRUCTION FOR MOLECULAR
STRUCTURE DETERMINATION
SO INTERNATIONAL JOURNAL OF HIGH PERFORMANCE COMPUTING APPLICATIONS
LA English
DT Article
DE Cryo-EM; 3D image reconstruction; parallel computing; regularization
ID SPARSE LINEAR-EQUATIONS; ELECTRON-MICROSCOPY; LEAST-SQUARES;
BIDIAGONALIZATION; ALGORITHM; VISUALIZATION; REFINEMENT; LSQR
AB We describe an efficient parallel implementation of a reliable iterative reconstruction algorithm for estimating the three-dimensional (3D) density map of a macromolecular complex from a large number of two-dimensional (2D) cryo-electron microscopy (Cryo-EM) images. Our algorithm is based on a hybrid regularization approach first developed by Bjorck and O'Leary-Simmons. Our implementation uses a special data structure to represent the 3D density map to improve data locality in the reconstruction computation. Our parallelization strategy allows both 2D images and 3D data to be distributed on a 2D processor grid. We have used our implementation successfully on several datasets of different sizes, and we are able to achieve scalable parallel performance on a distributed memory cluster using over 15,000 CPUs for the largest dataset.
C1 [Chung, Julianne] Emory Univ, Dept Math & Comp Sci, Atlanta, GA 30322 USA.
[Sternberg, Philip] ILOG, Incline Village, NV 89451 USA.
[Yang, Chao] Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA.
RP Chung, J (reprint author), Emory Univ, Dept Math & Comp Sci, Atlanta, GA 30322 USA.
EM JMCHUNG@ALUM.EMORY.EDU; PHILIP.STERNBERG@GMAIL.COM; CYANG@LBL.GOV
FU DOE; Office of Advanced Scientific Computing Research of the US
Department of Energy [DE-AC02-05CH11232]; Computational Research
Division at Lawrence Berkeley National Laboratory; NIH [P01 GM064692]
FX We would like to thank the anonymous referees for their careful reading
and helpful comments. The research of JC was supported in part by a DOE
Computational Science Graduate Research Fellowship. The computational
results presented were obtained at the National Energy Research
Scientific Computing Center (NERSC), which is supported by the Director,
Office of Advanced Scientific Computing Research of the US Department of
Energy under contract number DE-AC02-05CH11232. This research was
conducted while PS was a postdoctoral fellow in the Computational
Research Division at Lawrence Berkeley National Laboratory. The research
of PS and CY is supported by NIH Grant P01 GM064692.
NR 28
TC 1
Z9 1
U1 0
U2 3
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 1094-3420
EI 1741-2846
J9 INT J HIGH PERFORM C
JI Int. J. High Perform. Comput. Appl.
PD MAY
PY 2010
VL 24
IS 2
BP 117
EP 135
DI 10.1177/1094342009106293
PG 19
WC Computer Science, Hardware & Architecture; Computer Science,
Interdisciplinary Applications; Computer Science, Theory & Methods
SC Computer Science
GA 585UY
UT WOS:000276856300002
ER
PT J
AU Palmer, B
Gurumoorthi, V
Tartakovsky, A
Scheibe, T
AF Palmer, Bruce
Gurumoorthi, Vidhya
Tartakovsky, Alexandre
Scheibe, Tim
TI A COMPONENT-BASED FRAMEWORK FOR SMOOTHED PARTICLE HYDRODYNAMICS
SIMULATIONS OF REACTIVE FLUID FLOW IN POROUS MEDIA
SO INTERNATIONAL JOURNAL OF HIGH PERFORMANCE COMPUTING APPLICATIONS
LA English
DT Article
DE common component architecture; software engineering; particle-based
algorithms; interfaces; data annotation
ID PERFORMANCE
AB The development of a framework to support smoothed particle hydrodynamics (SPH) simulations of fluid flow and transport in porous media is described. The framework is built using the Common Component Architecture (CCA) toolkit and it supports SPH simulations using a variety of different SPH models and setup formats. The SPH simulation code is decomposed into independent components that represent self-contained units of functionality. Different physics models can be developed within the framework by re-implementing key components but no modification of other components is required. A model for defining components and developing abstract interfaces that support a high degree of modularity and minimal dependencies between components is discussed in detail.
C1 [Palmer, Bruce; Gurumoorthi, Vidhya; Tartakovsky, Alexandre; Scheibe, Tim] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Palmer, B (reprint author), Pacific NW Natl Lab, BOX 999, Richland, WA 99352 USA.
EM BRUCE.PALMER@PNL.GOV; VIDHYA.GURUMOORTHI@PNL.GOV;
ALEXANDRE.TARTAKOVSKY@PNL.GOV; TIM.SCHEIBE@PNL.GOV
RI Scheibe, Timothy/A-8788-2008
OI Scheibe, Timothy/0000-0002-8864-5772
FU US Department of Energy's Office of Science; Department of Energy's
Office of Biological and Environmental Research; Battelle Memorial
Institute [DE-AC05-76RL01830]
FX The authors are indebted to the CCA development team for its support and
help on issues related to building and using the CCA toolkit. We are
also indebted to Karen Schuchardt for useful discussions on the use of a
data manager. This research is supported by the US Department of
Energy's Office of Science under the Scientific Discovery through
Advanced Computing (SciDAC) program. A portion of this research was
performed using the Molecular Science Computing Facility at EMSL, a
national scientific user facility sponsored by the Department of
Energy's Office of Biological and Environmental Research and located at
Pacific Northwest National Laboratory. Pacific Northwest National
Laboratory is operated for the Department of Energy by the Battelle
Memorial Institute under contract DE-AC05-76RL01830.
NR 17
TC 9
Z9 9
U1 1
U2 8
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 1094-3420
J9 INT J HIGH PERFORM C
JI Int. J. High Perform. Comput. Appl.
PD MAY
PY 2010
VL 24
IS 2
BP 228
EP 239
DI 10.1177/1094342009358415
PG 12
WC Computer Science, Hardware & Architecture; Computer Science,
Interdisciplinary Applications; Computer Science, Theory & Methods
SC Computer Science
GA 585UY
UT WOS:000276856300009
ER
PT J
AU Rennard, D
French, R
Czernik, S
Josephson, T
Schmidt, L
AF Rennard, David
French, Rick
Czernik, Stefan
Josephson, Tyler
Schmidt, Lanny
TI Production of synthesis gas by partial oxidation and steam reforming of
biomass pyrolysis oils
SO INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
LA English
DT Article
DE Pyrolysis oil; Bio-oil; Syngas; Catalytic partial oxidation; Steam
reforming; Rhodium
ID CATALYTIC PARTIAL OXIDATION; NOBLE-METAL CATALYSTS; BIO-OIL;
HYDROGEN-PRODUCTION; AQUEOUS-PHASE; SEQUENTIAL CRACKING; MODEL
COMPOUNDS; BED REACTOR; FUEL; FRACTION
AB As the lowest cost biomass-derived liquids, pyrolysis oils (also called bio-oils) represent a promising vector for biomass to fuels conversion. However, bio-oils require upgrading to interface with existing infrastructure. A potential pathway for producing fuels from pyrolysis oils proceeds through gasification, the conversion to synthesis gas. In this work, the conversion of bio-oils to syngas via catalytic partial oxidation over Rh-Ce is evaluated using two reactor configurations. In one instance, pyrolysis oils are oxidized in excess steam in a freeboard and passed over the catalyst in a second zone. In the second instance, bio-oils are introduced directly to the catalyst. Coke formation is avoided in both configurations due to rapid oxidation. H(2) and CO can be produced autothermally over Rh-Cc catalysts with millisecond contact times. Co-processing of bio-oil with methane or methanol improved the reactor operation stability. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
C1 [Rennard, David; Josephson, Tyler; Schmidt, Lanny] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA.
[French, Rick; Czernik, Stefan] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Schmidt, L (reprint author), Univ Minnesota, Dept Chem Engn & Mat Sci, 421 Washington Ave, Minneapolis, MN 55455 USA.
EM schmidt@cems.umn.edu
FU Department of Energy; 3M
FX The authors wish to gratefully acknowledge that the funding for this
work was provided by Department of Energy Hydrogen, Fuel Cells, and
Infrastructure Program. DCR also received fellowship funding from 3M.
The authors are also grateful to the Minnesota Supercomputing Institute
for the equilibrium calculations, and Dr. Roger Ruan and Dr. Yiqin Wan
for elemental and moisture analysis.
NR 46
TC 33
Z9 33
U1 3
U2 28
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0360-3199
J9 INT J HYDROGEN ENERG
JI Int. J. Hydrog. Energy
PD MAY
PY 2010
VL 35
IS 9
BP 4048
EP 4059
DI 10.1016/j.ijhydene.2010.01.143
PG 12
WC Chemistry, Physical; Electrochemistry; Energy & Fuels
SC Chemistry; Electrochemistry; Energy & Fuels
GA 598SD
UT WOS:000277857600014
ER
PT J
AU Park, CY
Lee, TH
Dorris, SE
Balachandran, U
AF Park, C. Y.
Lee, T. H.
Dorris, S. E.
Balachandran, U.
TI Hydrogen production from fossil and renewable sources using an oxygen
transport membrane
SO INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
LA English
DT Article
DE La(0.7)Sr(0.3)Cu(0.2)Fe(0.8)O(3-delta); Oxygen transport membrane; Water
splitting; Ethanol reforming; Hydrogen production
ID FUEL-CELLS; THERMODYNAMIC ANALYSIS; WATER DISSOCIATION; BIO-ETHANOL;
STEAM; CATALYSTS; REACTOR; CERMET; PERMEATION; SEPARATION
AB Oxygen transport membranes (OTMs) made of mixed ion-electron conductors can be used to increase the production of hydrogen from fossil and renewable sources. This study describes two methods for producing hydrogen with La(0.7)Sr(0.3)Cu(0.2)Fe(0.8)O(3-delta) (LSCF7328), an OTM material that is easily prepared, exhibits good mechanical properties, and is stable in severe gas conditions. In tests with thin-film (thickness approximate to 22 mu m) LSCF7328 membranes, hydrogen was produced by flowing simulated product streams from CO(2) gasification of coal on one side of the OTM and steam on the other side. In this method, the so-called coal gas on the oxygen-permeate side drives the removal of oxygen from the other side of the OTM, where hydrogen and oxygen are produced by water splitting. With CO (99.5% purity) flowing on the oxygen-permeate side, the hydrogen production rate was measured to be approximate to 4.7 cm(3)/min-cm(2) at 900 degrees C, indicating that hydrogen can be produced at a significant rate by using product streams from coal gasification. This process also yields a CO(2)-rich product stream that is ready for sequestration. In another test, a tubular LSCF7328 was found to increase the hydrogen production from ethanol reforming by supplying high-purity oxygen from air. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
C1 [Park, C. Y.; Lee, T. H.; Dorris, S. E.; Balachandran, U.] Argonne Natl Lab, Div Energy Syst, Argonne, IL 60439 USA.
RP Park, CY (reprint author), Argonne Natl Lab, Div Energy Syst, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM cpark@anl.gov
FU U.S. Department of Energy (DOE), Energy Efficiency and Renewable Energy,
Office of Fuel Cell Technologies; Office of Fossil Energy; National
Energy Technology Laboratory [DE-AC02-06CH11357]
FX Work supported by the U.S. Department of Energy (DOE), Energy Efficiency
and Renewable Energy, Office of Fuel Cell Technologies Program, and
Office of Fossil Energy, National Energy Technology Laboratory's
Hydrogen and Fuels Technology Program, under Contract DE-AC02-06CH11357.
NR 33
TC 19
Z9 19
U1 2
U2 16
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0360-3199
J9 INT J HYDROGEN ENERG
JI Int. J. Hydrog. Energy
PD MAY
PY 2010
VL 35
IS 9
BP 4103
EP 4110
DI 10.1016/j.ijhydene.2010.02.025
PG 8
WC Chemistry, Physical; Electrochemistry; Energy & Fuels
SC Chemistry; Electrochemistry; Energy & Fuels
GA 598SD
UT WOS:000277857600020
ER
PT J
AU Ahluwalia, RK
Huaa, TQ
Peng, JK
Lasher, S
McKenney, K
Sinha, J
Gardiner, M
AF Ahluwalia, R. K.
HuaA, T. Q.
Peng, J. -K.
Lasher, S.
McKenney, K.
Sinha, J.
Gardiner, M.
TI Technical assessment of cryo-compressed hydrogen storage tank systems
for automotive applications
SO INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
LA English
DT Article
DE Hydrogen storage; Cryo-compressed hydrogen
ID INSULATED PRESSURE-VESSELS; FUEL-CELL VEHICLES; ECONOMY; LINER
AB On-board and off-board performance and cost of cryo-compressed hydrogen storage are assessed and compared to the targets for automotive applications. The on-board performance of the system and high-volume manufacturing cost were determined for liquid hydrogen refueling with a single-flow nozzle and a pump that delivers liquid H(2) to the insulated cryogenic tank capable of being pressurized to 272 atm. The off-board performance and cost of delivering liquid hydrogen were determined for two scenarios in which hydrogen is produced by central steam methane reforming (SMR) or by central electrolysis. The main conclusions are that the cryo-compressed storage system has the potential of meeting the ultimate target for system gravimetric capacity, mid-term target for system volumetric capacity, and the target for hydrogen loss during dormancy under certain conditions of minimum daily driving. However, the high-volume manufacturing cost and the fuel cost for the SMR hydrogen production scenario are, respectively, 2-4 and 1.6-2.4 times the current targets, and the well-to-tank efficiency is well short of the 60% target specified for off-board regenerable materials. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
C1 [Ahluwalia, R. K.; HuaA, T. Q.; Peng, J. -K.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Lasher, S.; McKenney, K.; Sinha, J.] TIAX LLC, Cambridge, MA 02140 USA.
[Gardiner, M.] US DOE, Washington, DC 20585 USA.
RP Ahluwalia, RK (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM walia@anl.gov
FU U. S. Department of Energy [DE-AC02-06CH11357]
FX This work was supported by the U. S. Department of Energy's Office of
Energy Efficiency and Renewable Energy, Fuel Cell Technologies Program.
The authors thank Dr. Romesh Kumar of Argonne National Laboratory for
many useful discussions and helpful suggestions. Argonne National
Laboratory, a U. S. Department of Energy Office of Science laboratory,
is operated by UChicago Argonne, LLC, under Contract No.
DE-AC02-06CH11357.
NR 16
TC 42
Z9 44
U1 3
U2 20
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0360-3199
J9 INT J HYDROGEN ENERG
JI Int. J. Hydrog. Energy
PD MAY
PY 2010
VL 35
IS 9
BP 4171
EP 4184
DI 10.1016/j.ijhydene.2010.02.074
PG 14
WC Chemistry, Physical; Electrochemistry; Energy & Fuels
SC Chemistry; Electrochemistry; Energy & Fuels
GA 598SD
UT WOS:000277857600028
ER
PT J
AU Zhao, F
Liu, Q
Wang, SW
Brinkman, K
Chen, FL
AF Zhao, Fei
Liu, Qiang
Wang, Siwei
Brinkman, Kyle
Chen, Fanglin
TI Synthesis and characterization of BaIn0.3-xYxCe0.7O3-delta (x=0, 0.1,
0.2, 0.3) proton conductors
SO INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
LA English
DT Article
DE Barium cerate; Proton conductor; Electrical property; Stability
ID OXYGEN-ION CONDUCTION; OXIDE FUEL-CELLS; DOPED BACEO3;
CHEMICAL-STABILITY; ELECTROCHEMICAL PROPERTIES; TRANSPORT-PROPERTIES;
BARIUM CERATE; EXPANSION; CERAMICS; BEHAVIOR
AB The morphological and electrical properties of yttrium (Y) and indium (In) doped barium cerate perovskites of the form BaIn0.3-xYxCe0.7O3-delta (with x = 0-0.3) prepared by a modified Pechini method were investigated as potential high temperature proton conductors with improved chemical stability and conductivity. The sinterability increased with the increase of In-doping, and the perovskite phase was found in the BaIn0.3-xYxCe0.7O3-delta solid solutions over the range 0 <= x <= 0.3. The conductivities decreased from x = 0.3 to 0 while the tolerance to wet CO2 improved for Baln(0.3-x)Y(x)Ce(0.7)O(3-delta) samples with an increase of In-doping. BaIn0.1Y0.2Ce0.7O3-delta was found to have relatively high conductivity as well as acceptable wet CO2 stability. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
C1 [Zhao, Fei; Liu, Qiang; Wang, Siwei; Chen, Fanglin] Univ S Carolina, Dept Mech Engn, Columbia, SC 29208 USA.
[Brinkman, Kyle] Savannah River Natl Lab, Aiken, SC 29808 USA.
RP Chen, FL (reprint author), Univ S Carolina, Dept Mech Engn, Columbia, SC 29208 USA.
EM chenfa@cec.sc.edu
RI liu, qiang/G-6335-2010; Wang, Siwei/A-9048-2012; Chen,
Fanglin/K-1039-2012
OI Chen, Fanglin/0000-0001-9942-8872
FU Department of Energy Nuclear Energy University Program (NEUP) [09-510];
South Carolina Universities Research and Education Foundation [09-155]
FX The financial support of the Department of Energy Nuclear Energy
University Program (NEUP) (award no. 09-510) and the South Carolina
Universities Research and Education Foundation (award no. 09-155) is
acknowledged gratefully.
NR 30
TC 61
Z9 61
U1 1
U2 24
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0360-3199
J9 INT J HYDROGEN ENERG
JI Int. J. Hydrog. Energy
PD MAY
PY 2010
VL 35
IS 9
BP 4258
EP 4263
DI 10.1016/j.ijhydene.2010.02.080
PG 6
WC Chemistry, Physical; Electrochemistry; Energy & Fuels
SC Chemistry; Electrochemistry; Energy & Fuels
GA 598SD
UT WOS:000277857600037
ER
PT J
AU Dolotko, O
Paulson, N
Pecharsky, VK
AF Dolotko, Oleksandr
Paulson, Neil
Pecharsky, Vitalij K.
TI Thermochemical transformations in 2MNH(2)-3MgH(2) systems (M = Li or Na)
SO INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
LA English
DT Article
DE Hydrides; Hydrogen release; Amides; X-ray diffraction; Temperature
programmed dehydrogenation
ID HYDROGEN STORAGE-SYSTEM; H SYSTEM; COMPLEX HYDRIDES; DESTABILIZATION;
IMIDES; MG3N2
AB Thermochemical reactions between alkali metal amides and magnesium hydride taken in 2:3 molar ratios have been investigated using pressure-composition-temperature, X-ray powder diffraction and residual gas analysis measurements. The thermally induced reactions in both title systems are stoichiometric and proceed as a following solid state transformation: 2MNH(2)+ 3MgH(2) -> Mg(3)N(2) + 2MH + 4H(2)up arrow. A total of 6.45 wt.% of hydrogen is released by the 2LiNH(2)-3MgH(2) system beginning at 186 degrees C, and a total of 5.1 wt.% H(2) is released by the 2NaNH(2)-3MgH(2) system starting at 130 degrees C. Combined structure/property investigations revealed that the transformation in the lithium containing system proceeds in two steps. In the first step, lithium amide reacts with MgH(2) to form Li(2)Mg(NH)(2) and hydrogen. In the second step, reaction between Li(2)Mg(NH) and MgH(2) leads to the formation of the Mg(3)N(2) nitride, lithium hydride and additional gaseous hydrogen. The transformation in the sodium containing system appears to proceed through a series of competing solid state processes with formation of Mg(NH(2))(2) and NaMgH(3) intermediates. Partial rehydrogenation in 190 bar hydrogen pressure leading to formation of the MgNH imide was observed in the dehydrogenated 2NaNH(2)-3MgH(2) system at 395 degrees C. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
C1 [Dolotko, Oleksandr; Pecharsky, Vitalij K.] Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA.
[Paulson, Neil] Olin Coll, Needham, MA 02492 USA.
[Pecharsky, Vitalij K.] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
RP Pecharsky, VK (reprint author), Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA.
EM vitkp@ameslab.gov
RI Mahalingam, Arjun/G-8586-2011
FU Office of Basic Energy Sciences, Materials Sciences Division of the
Office of Science of the US Department of Energy [DE-ACO2-07CH11358];
Iowa State University of Science and Technology
FX This work was supported by the Office of Basic Energy Sciences,
Materials Sciences Division of the Office of Science of the US
Department of Energy under Contract No. DE-ACO2-07CH11358 with Iowa
State University of Science and Technology.
NR 21
TC 14
Z9 14
U1 0
U2 5
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0360-3199
J9 INT J HYDROGEN ENERG
JI Int. J. Hydrog. Energy
PD MAY
PY 2010
VL 35
IS 10
SI SI
BP 4562
EP 4568
DI 10.1016/j.ijhydene.2010.02.104
PG 7
WC Chemistry, Physical; Electrochemistry; Energy & Fuels
SC Chemistry; Electrochemistry; Energy & Fuels
GA 606IU
UT WOS:000278418700013
ER
PT J
AU Houf, W
Schefer, R
Evans, G
Merilo, E
Groethe, M
AF Houf, W.
Schefer, R.
Evans, G.
Merilo, E.
Groethe, M.
TI Evaluation of barrier walls for mitigation of unintended releases of
hydrogen
SO INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
LA English
DT Article
DE Hydrogen safety; Jet flames; Barrier walls; Codes and standards
ID JET FLAMES; HIGH-PRESSURE
AB Hydrogen jet flames resulting from ignition of unintended releases can be extensive in length and pose significant radiation and impingement hazards. Depending on the leak diameter and source pressure, the resulting consequence distances can be unacceptably large. One possible mitigation strategy to reduce exposure to jet flames is to incorporate barriers around hydrogen storage and delivery equipment. While reducing the extent of unacceptable consequences, the walls may introduce other hazards if not properly configured. An experimental and modeling program has been performed at Sandia National Laboratories to better characterize the effectiveness of barrier walls to reduce hazards. This paper describes the experimental and modeling program and presents results obtained for various barrier configurations. The experimental measurements include flame deflection using standard and infrared video and high-speed movies (500 fps) to study initial flame propagation from the ignition source. Measurements of the ignition overpressure, wall deflection, radiative heat flux, and wall and gas temperature were also made at strategic locations. The modeling effort includes three-dimensional calculations of jet flame deflection by the barriers, computations of the thermal radiation field around barriers, predicted overpressure from ignition, and the computation of the concentration field from deflected unignited hydrogen releases. The various barrier designs are evaluated in terms of their mitigation effectiveness for the associated hazards present. The results show that barrier walls are effective at deflecting jet flames in a desired direction and can help attenuate the effects of ignition overpressure and flame radiative heat flux. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
C1 [Houf, W.; Schefer, R.; Evans, G.] Sandia Natl Labs, Livermore, CA USA.
[Merilo, E.; Groethe, M.] SRI Int, Menlo Pk, CA 94025 USA.
RP Houf, W (reprint author), Sandia Natl Labs, Livermore, CA USA.
EM will@sandia.gov
RI Schefer, Jurg/G-3960-2012
FU United States Department of Energy's, National Nuclear Security
Administration [DE-AC04-94-AL85000]; U.S. Department of Energy, Office
of Energy Efficiency and Renewable Energy
FX Sandia National Laboratory, Livermore, CA. Sandia is a multiprogram
laboratory operated by Sandia Corporation, a Lockheed Martin Company,
for the United States Department of Energy's, National Nuclear Security
Administration under Contract DE-AC04-94-AL85000.; This work was
supported by the U.S. Department of Energy, Office of Energy Efficiency
and Renewable Energy under the Codes and Standards subprogram element
managed by Antonio Ruiz.
NR 27
TC 6
Z9 6
U1 0
U2 4
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0360-3199
J9 INT J HYDROGEN ENERG
JI Int. J. Hydrog. Energy
PD MAY
PY 2010
VL 35
IS 10
SI SI
BP 4758
EP 4775
DI 10.1016/j.ijhydene.2010.02.086
PG 18
WC Chemistry, Physical; Electrochemistry; Energy & Fuels
SC Chemistry; Electrochemistry; Energy & Fuels
GA 606IU
UT WOS:000278418700032
ER
PT J
AU O'Brien, JE
McKellar, MG
Harvego, EA
Stoots, CM
AF O'Brien, J. E.
McKellar, M. G.
Harvego, E. A.
Stoots, C. M.
TI High-temperature electrolysis for large-scale hydrogen and syngas
production from nuclear energy - summary of system simulation and
economic analyses
SO INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
LA English
DT Article; Proceedings Paper
CT 1st International Conference on Hydrogen Production (ICH2P09)
CY MAY 03-06, 2009
CL Univ Ontario, Inst Technol, Oshawa, CANADA
HO Univ Ontario, Inst Technol
DE Hydrogen production; Syngas; Nuclear
ID STEAM
AB A research and development program is under way at the Idaho National Laboratory (INL) to assess the technological and scale-up issues associated with the implementation of solid-oxide electrolysis cell technology for efficient high-temperature hydrogen production from steam. This work is supported by the US Department of Energy, Office of Nuclear Energy, under the Nuclear Hydrogen Initiative. This paper will provide an overview of large-scale system modeling results and economic analyses that have been completed to date. System analysis results have been obtained using the commercial code UniSim, augmented with a custom high-temperature electrolyzer module. Economic analysis results were based on the DOE H2A analysis methodology. The process flow diagrams for the system simulations include an advanced nuclear reactor as a source of high-temperature process heat, a power cycle and a coupled steam electrolysis loop. Several reactor types and power cycles have been considered, over a range of reactor outlet temperatures. Pure steam electrolysis for hydrogen production as well as coelectrolysis for syngas production from steam/carbon dioxide mixtures have both been considered. In addition, the feasibility of coupling the high-temperature electrolysis process to biomass and coal-based synthetic fuels production has been considered. These simulations demonstrate that the addition of supplementary nuclear hydrogen to synthetic fuels production from any carbon source minimizes emissions of carbon dioxide during the production process. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
C1 [O'Brien, J. E.; McKellar, M. G.; Harvego, E. A.; Stoots, C. M.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP O'Brien, JE (reprint author), Idaho Natl Lab, 2525 N Fremont Ave, Idaho Falls, ID 83415 USA.
EM james.obrien@inl.gov
NR 35
TC 72
Z9 74
U1 2
U2 32
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0360-3199
J9 INT J HYDROGEN ENERG
JI Int. J. Hydrog. Energy
PD MAY
PY 2010
VL 35
IS 10
SI SI
BP 4808
EP 4819
DI 10.1016/j.ijhydene.2009.09.009
PG 12
WC Chemistry, Physical; Electrochemistry; Energy & Fuels
SC Chemistry; Electrochemistry; Energy & Fuels
GA 606IU
UT WOS:000278418700036
ER
PT J
AU Stoots, CM
O'Brien, JE
Condie, KG
Hartvigsen, JJ
AF Stoots, Carl M.
O'Brien, James E.
Condie, Keith G.
Hartvigsen, Joseph J.
TI High-temperature electrolysis for large-scale hydrogen production from
nuclear energy - Experimental investigations
SO INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
LA English
DT Article; Proceedings Paper
CT 1st International Conference on Hydrogen Production (ICH2P09)
CY MAY 03-06, 2009
CL Univ Ontario, Inst Technol, Oshawa, CANADA
HO Univ Ontario, Inst Technol
DE Electrolysis; Nuclear; Solid-oxide
AB The Idaho National Laboratory (INL) is currently assessing the feasibility of using solid-oxide based electrolysis cell technology for high temperature electrolysis of steam for large-scale hydrogen production. In parallel, the INL is studying the simultaneous electrolysis of steam and carbon dioxide for syngas (hydrogen/carbon monoxide mixture) production. When linked to a nuclear power source, this technology provides a carbon neutral means of producing syngas while consuming CO(2). The scope of experimental investigations at the INL includes single button cell tests, multi-cell stacks, and multi-stack systems. Multi-cell stack testing used 10 cm x 10 cm (8 cm x 8 cm active area) or 20 cm x 20 cm (18 cm x 18 cm active area) planar cells supplied by Ceramatec, Inc (Salt Lake City, Utah, USA). Multi-stack testing encompassed up to 720 10 cm x 10 cm cells and was conducted in a newly developed 15 kW Integrated Laboratory Scale (ILS) test facility. Gas composition, operating voltage, and operating temperature were varied during testing. The tests were heavily instrumented, and outlet gas compositions were monitored with a gas chromatograph. Results to date show the process to be a promising technique for large-scale hydrogen and syngas production. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
C1 [Stoots, Carl M.; O'Brien, James E.; Condie, Keith G.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
[Hartvigsen, Joseph J.] Ceramatec Inc, Salt Lake City, UT 84119 USA.
RP Stoots, CM (reprint author), Idaho Natl Lab, 2525 Fremont Ave,MS 3870, Idaho Falls, ID 83415 USA.
EM Carl.stoots@inl.gov; James.obrien@inl.gov; Keith.condie@inl.gov;
jjh@ceramatec.com
NR 7
TC 83
Z9 85
U1 2
U2 33
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0360-3199
J9 INT J HYDROGEN ENERG
JI Int. J. Hydrog. Energy
PD MAY
PY 2010
VL 35
IS 10
SI SI
BP 4861
EP 4870
DI 10.1016/j.ijhydene.2009.10.045
PG 10
WC Chemistry, Physical; Electrochemistry; Energy & Fuels
SC Chemistry; Electrochemistry; Energy & Fuels
GA 606IU
UT WOS:000278418700041
ER
PT J
AU Wang, J
Yang, B
Cool, TA
Hansen, N
AF Wang, Juan
Yang, Bin
Cool, Terrill A.
Hansen, Nils
TI Absolute cross-sections for dissociative photoionization of some small
esters
SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
LA English
DT Article
DE Photoionization cross-section; Ester; Biofuel; Photoionization mass
spectrometry (PIMS); Combustion chemistry
ID IONIZED METHYL ACETATE; ADVANCED LIGHT-SOURCE; FUEL-RICH FLAMES;
MASS-SPECTROMETRY; GAS-PHASE; UNIMOLECULAR DISSOCIATION; ETHYL FORMATE;
IONIZATION POTENTIALS; PHOTOELECTRON-SPECTRA; BIODIESEL SURROGATE
AB The first measurements of absolute cross-sections for near-threshold molecular and dissociative photoionization are presented for 11 small esters (methyl formate, ethyl formate, vinyl acetate, methyl propanoate, ethyl propanoate, methyl butanoate, methyl isobutanoate, methyl propenoate, ethyl propenoate, methyl crotonate, and methyl methacrylate). Photoionization mass spectrometry (PIMS) is employed with an energy resolution of 40 meV (fwhm) using a monochromated VUV synchrotron light source. An extensive literature exploring isomerization/dissociation mechanisms is available for six of these molecules. There are, however, no previous observations of dissociative ionization for four simple monounsaturated esters (methyl propenoate, ethyl propenoate, methyl crotonate, and methyl methacrylate), and dissociative ionization of ethyl propanoate has received scant attention. Appearance energies for dissociative photofragment ions of these five molecules are presented. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Wang, Juan; Yang, Bin; Cool, Terrill A.] Cornell Univ, Sch Appl & Engn Phys, Ithaca, NY 14853 USA.
[Hansen, Nils] Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA.
RP Cool, TA (reprint author), Cornell Univ, Sch Appl & Engn Phys, 228 Clark Hall, Ithaca, NY 14853 USA.
EM tac13@cornell.edu
RI Yang, Bin/A-7158-2008; Hansen, Nils/G-3572-2012
OI Yang, Bin/0000-0001-7333-0017;
FU Division of Chemical Sciences, Geosciences, and Biosciences; Office of
Basic Energy Sciences; U.S. Department of Energy [DE-FG02-01ER15180,
ACO205CH11231]
FX The authors thank Tina Kasper for helpful discussions and are grateful
to Paul Fugazzi for expert technical assistance. This work is supported
by the Division of Chemical Sciences, Geosciences, and Biosciences, the
Office of Basic Energy Sciences, the U.S. Department of Energy, in part
under grant DE-FG02-01ER15180. Sandia is a multi-program laboratory
operated by Sandia Corporation, a Lockheed Martin Company, for the
National Nuclear Security Administration under contract
DE-AC04-94-AL85000. The Advanced Light Source is supported by the
Director, Office of Science, Office of Basic Energy Sciences, Materials
Sciences Division, of the U.S. Department of Energy under Contract No.
DE-ACO205CH11231 at Lawrence Berkeley National Laboratory.
NR 65
TC 20
Z9 20
U1 1
U2 34
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1387-3806
J9 INT J MASS SPECTROM
JI Int. J. Mass Spectrom.
PD MAY 1
PY 2010
VL 292
IS 1-3
BP 14
EP 22
DI 10.1016/j.ijms.2010.02.010
PG 9
WC Physics, Atomic, Molecular & Chemical; Spectroscopy
SC Physics; Spectroscopy
GA 598RE
UT WOS:000277854900003
ER
PT J
AU Koizumi, H
Jatko, B
Andrews, WH
Whitten, WB
Reilly, PTA
AF Koizumi, Hideya
Jatko, Bruce
Andrews, William H., Jr.
Whitten, William B.
Reilly, Peter T. A.
TI A novel phase-coherent programmable clock for high-precision arbitrary
waveform generation applied to digital ion trap mass spectrometry
SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
LA English
DT Article
DE Ion trap mass spectrometry; Digital ion trap; Waveform generation
ID FREQUENCY; MOTION
AB Digital ion trap (DIT) mass spectrometry requires the ability to precisely and accurately produce waveforms. The quality of the mass spectra produced in terms of resolution and mass accuracy depend on the resolution and precision of the applied waveforms. This publication reveals a novel method for the production of arbitrary waveforms in general and then applies the method to the production of DIT waveforms. Arbitrary waveforms can be created by varying the clock frequency input to a programmable read only memory that is then input to a digital-to-analog converter (DAC). The arbitrary waveform is composed of a defined number of points that are triggered to be written after programmed numbers of clock cycles to define the arbitrary waveform. The novelty introduced here is that the direct digital synthesis (DDS) generated clock frequency can be precisely changed as the arbitrary waveform is written because we have developed a method to rapidly switch the DDS frequency exactly at the end of the output clock cycle allowing exact timing of multiple transitions to produce precise and temporally complex waveforms. Changing the frequency only at the end of the output clock cycle is a phase-coherent process that permits precise timing between each point in the arbitrary waveform. This waveform generation technique was demonstrated by creating a prototype that was used to operate a digital ion trap mass spectrometer. The jitter in the phase-coherent DDS TTL output that was used as the frequency-variable clock was 20 ps. This jitter represents the realizable limit of precision for waveform generation. The rectangular waveforms used to operate the mass spectrometer were created with counters that increased the arbitrary jitter to 100 Ps. The mass resolution achieved was 5000 at m/z = 414. Resolution should improve with increasing mass because the waveforms have longer periods while the jitter should remain constant. Given the current limit of the variable clock resolution, much better mass resolution should be achievable with future generations of the waveform production system. The agility of the DDS function generators permits the phase-coherent variable clock to be switched at a rate up to 250 MHz. This permits arbitrary waveforms to be produced with much more temporal complexity than previously possible. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Koizumi, Hideya; Jatko, Bruce; Andrews, William H., Jr.; Whitten, William B.; Reilly, Peter T. A.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Reilly, PTA (reprint author), Oak Ridge Natl Lab, POB 2008,MS 6142, Oak Ridge, TN 37831 USA.
EM ReillyPT@ornl.gov
FU UT-Battelle, LLC [DE-AC05-000R22725]
FX This research was supported by maturation funding from UT-Battelle, LLC
Under contract No. DE-AC05-000R22725 with Oak Ridge National Laboratory,
managed and operated by UT-Battelle. LLC.
NR 13
TC 4
Z9 4
U1 1
U2 9
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1387-3806
J9 INT J MASS SPECTROM
JI Int. J. Mass Spectrom.
PD MAY 1
PY 2010
VL 292
IS 1-3
BP 23
EP 31
DI 10.1016/j.ijms.2010.02.011
PG 9
WC Physics, Atomic, Molecular & Chemical; Spectroscopy
SC Physics; Spectroscopy
GA 598RE
UT WOS:000277854900004
ER
PT J
AU Zeng, L
Balachandar, S
Najjar, FM
AF Zeng, Lanying
Balachandar, S.
Najjar, Fady M.
TI Wake response of a stationary finite-sized particle in a turbulent
channel flow
SO INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
LA English
DT Article
DE Turbulence modulation; Particle wake; Drag and lift forces; Direct
numerical simulation
ID REYNOLDS-NUMBER; BOUNDARY-LAYER; WALL-TURBULENCE; SOLID PARTICLES; RIGID
SPHERE; MODERATE RE; MOTION; BEHAVIOR; FORCES; SHEAR
AB Here we consider the effect of a finite-sized stationary particle in a channel flow of modest turbulence at Re(tau) = 178.12. The size of particle is varied such that the particle Reynolds number ranges from about 40 to 450. The location of the particle is chosen to be either in the buffer layer (y(p+) = 17.81) or at the channel center. Fully resolved direct numerical simulations of the turbulent channel flow around the particles is performed. Here the ambient turbulence intensity relative to the mean velocity seen by the particle is large (I = 23.16%) in the buffer region, while it is substantially lower (I = 4.09%) at the channel center. We present results on turbulence modulation due to the particle in terms of wake dynamics and vortex shedding. (C) 2010 Elsevier Ltd. All rights reserved.
C1 [Balachandar, S.] Univ Florida, Dept Mech & Aerosp Engn, Gainesville, FL 32611 USA.
[Zeng, Lanying] Univ Illinois, Dept Phys, Urbana, IL 61801 USA.
[Najjar, Fady M.] Lawrence Livermore Natl Lab, Livermore, CA USA.
RP Balachandar, S (reprint author), Univ Florida, Dept Mech & Aerosp Engn, Gainesville, FL 32611 USA.
EM bala1s@ufl.edu
RI Balachandar, Sivaramakrishnan/E-7358-2011
FU ASCI Center for the Simulation of Advanced Rockets at the University of
Illinois at Urbana-Champaign through the US Department of Energy
[B523819]; NSF [CBET0639446]
FX This research was supported by the ASCI Center for the Simulation of
Advanced Rockets at the University of Illinois at Urbana-Champaign
through the US Department of Energy (subcontract number B523819) and NSF
CBET0639446. The National Center for Supercomputing Applications (UIUC)
is also acknowledged, for the use of their computational facilities.
NR 34
TC 10
Z9 10
U1 2
U2 17
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0301-9322
J9 INT J MULTIPHAS FLOW
JI Int. J. Multiph. Flow
PD MAY
PY 2010
VL 36
IS 5
BP 406
EP 422
DI 10.1016/j.ijmultiphaseflow.2010.01.001
PG 17
WC Mechanics
SC Mechanics
GA 582GJ
UT WOS:000276584400006
ER
PT J
AU Dingreville, R
Battaile, CC
Brewer, LN
Holm, EA
Boyce, BL
AF Dingreville, Remi
Battaile, Corbett C.
Brewer, Luke N.
Holm, Elizabeth A.
Boyce, Brad L.
TI The effect of microstructural representation on simulations of
microplastic ratcheting
SO INTERNATIONAL JOURNAL OF PLASTICITY
LA English
DT Article
DE Finite element method; Crystal plasticity; Fatigue; Ratcheting;
Microstructure
ID KINEMATIC HARDENING RULES; CRYSTAL PLASTICITY; STAINLESS-STEEL; MODEL;
DEFORMATION; BEHAVIOR; STRAINS; COPPER; CREEP; STATE
AB This paper assesses the sensitivity of cyclic plasticity to microstructure morphology by examining and comparing the microplastic ratcheting behavior of different idealized microstructures (square, hexagonal, tessellated, and digitized from experimental data). This analysis demonstrates the sensitivity of computational accuracy to the various approximations in microstructural representation. The methodology used to perform this study relies on a coupling between microstructural characterization, mechanical testing and numerical simulations to investigate the influence of the microstructure on the purely tensile uniaxial microplastic ratcheting behavior of pure nickel polycrystals. The morphology and deformation behavior of polycrystals were characterized using electron back-scatter diffraction (EBSD), while a finite element model (FEM) of crystal plasticity was used in a computational framework. The predicted cyclic behavior is compared to experimental results both at the macroscopic and microstructural scales. The stress-strain response is less sensitive to the details of the microstructural representation than might be expected with all representations displaying similar macroscopic constitutive response. However, the details of the plastic strain distribution at the microstructural scale and the related estimations of damage mechanics vary substantially from one microstructural representation to another. (C) 2009 Elsevier Ltd. All rights reserved.
C1 [Dingreville, Remi; Battaile, Corbett C.; Brewer, Luke N.; Holm, Elizabeth A.] Sandia Natl Labs, Computat Mat Sci & Engn Dept, Albuquerque, NM 87185 USA.
[Boyce, Brad L.] Sandia Natl Labs, Ctr Mat Sci & Engn, Albuquerque, NM 87185 USA.
RP Dingreville, R (reprint author), Sandia Natl Labs, Computat Mat Sci & Engn Dept, POB 5800, Albuquerque, NM 87185 USA.
EM rdingre@poly.edu
RI Boyce, Brad/H-5045-2012; Holm, Elizabeth/S-2612-2016;
OI Boyce, Brad/0000-0001-5994-1743; Holm, Elizabeth/0000-0003-3064-5769;
Dingreville, Remi/0000-0003-1613-695X
FU United States Department of Energy [DE-AC04-94AL85000]
FX The authors gratefully acknowledge T.E. Buchheit and R.A. Roach for
their useful discussions and valuable contributions. Sandia is a
multiprogram laboratory operated by Sandia Corporation, a Lockheed
Martin Company, for the United States Department of Energy, under
Contract No. DE-AC04-94AL85000.
NR 58
TC 24
Z9 25
U1 3
U2 21
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0749-6419
EI 1879-2154
J9 INT J PLASTICITY
JI Int. J. Plast.
PD MAY
PY 2010
VL 26
IS 5
BP 617
EP 633
DI 10.1016/j.ijplas.2009.09.004
PG 17
WC Engineering, Mechanical; Materials Science, Multidisciplinary; Mechanics
SC Engineering; Materials Science; Mechanics
GA 599RF
UT WOS:000277930100001
ER
PT J
AU Laddha, SG
Wu, C
Park, SJ
Lee, S
Ahn, S
German, RM
Atre, SV
AF Laddha, Sachin G.
Wu, Carl
Park, Seong-Jin
Lee, Shiwoo
Ahn, Seokyoung
German, Randall M.
Atre, Sundar V.
TI CHARACTERIZATION AND SIMULATION OF MACROSCALE MOLD-FILLING DEFECTS IN
MICROMINIATURE POWDER INJECTION MOLDING
SO INTERNATIONAL JOURNAL OF POWDER METALLURGY
LA English
DT Article
ID MICRO COMPONENTS; CERAMICS
AB While micromolding with polymers has met with success, material homogeneity remains a critical issue in powder injection molding (PIM) because separation of the powder and binder results in defects in metal or ceramic microparts. Material heterogeneity, or an inhomogeneous particle distribution, in green parts is related to inhomogeneous feedstock mixtures and to powder/binder separation occurring in melt flow. This is a major issue in micro-minature powder injection molding (mu PIM) because of the small particle sizes and high mold-flow velocities in filling. Also, small and irregular-shaped particles tend to agglomerate in the feedstock and fast mold filling may enhance particle migration because of the increased shear-rate gradient in the cavity. These issues prompted this study on the influence of material, processing conditions, and component geometry in the evolution of problems due to homogeneity in microparts such as microchannel arrays (MCAs). The present work focuses on characterization and application of simulation techniques to understand the origin and evolution of macroscale moldfilling defects during mu PIM.
C1 [Laddha, Sachin G.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Lee, Shiwoo; Atre, Sundar V.] Oregon State Univ, Oregon Nanosci & Microtechnol Inst, Corvallis, OR 97331 USA.
[Park, Seong-Jin] Pohang Univ Sci & Technol POSTECH, Dept Mech Engn, Pohang, South Korea.
[Ahn, Seokyoung] Univ Texas Pan Amer, Dept Mech Engn, Edinburg, TX 78541 USA.
[German, Randall M.] San Diego State Univ, Coll Engn, San Diego, CA 92182 USA.
RP Laddha, SG (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM Sundar.Atre@oregonstate.edu
RI Ahn, Seokyoung/D-5046-2014;
OI Ahn, Seokyoung/0000-0002-6978-7273; German, Randall/0000-0002-5676-8532
FU Hewlett-Packard; Air Force Research Laboratory [FA8650-05-1-5041]
FX These data and observations are primarily based on research sponsored by
Hewlett-Packard. Additional funding was provided by the Air Force
Research Laboratory under agreement number FA8650-05-1-5041. The views
and conclusions contained herein are those of the authors and should not
be interpreted as necessarily representing the official policies or
endorsements, either expressed or implied, by the Air Force Research
Laboratory or the U.S. Government.
NR 16
TC 5
Z9 6
U1 1
U2 4
PU AMER POWDER METALLURGY INST
PI PRINCETON
PA 105 COLLEGE ROAD EAST, PRINCETON, NJ 08540 USA
SN 0888-7462
J9 INT J POWDER METALL
JI Int. J. Powder Metall.
PD MAY-JUN
PY 2010
VL 46
IS 3
BP 49
EP 58
PG 10
WC Metallurgy & Metallurgical Engineering
SC Metallurgy & Metallurgical Engineering
GA 602BU
UT WOS:000278113900005
ER
PT J
AU Zhang, LR
Sun, WM
Wang, JJ
Zhang, M
Yang, SM
Tian, YP
Vidyasagar, S
Pena, LA
Zhang, KZ
Cao, YB
Yin, LJ
Wang, W
Zhang, L
Schaefer, KL
Saubermann, LJ
Swarts, SG
Fenton, BM
Keng, PC
Okunieff, P
AF Zhang, Lurong
Sun, Weimin
Wang, Jianjun
Zhang, Mei
Yang, Shanmin
Tian, Yeping
Vidyasagar, Sadasivan
Pena, Louis A.
Zhang, Kunzhong
Cao, Yongbing
Yin, Liangjie
Wang, Wei
Zhang, Lei
Schaefer, Katherine L.
Saubermann, Lawrence J.
Swarts, Steven G.
Fenton, Bruce M.
Keng, Peter C.
Okunieff, Paul
TI MITIGATION EFFECT OF AN FGF-2 PEPTIDE ON ACUTE GASTROINTESTINAL SYNDROME
AFTER HIGH-DOSE IONIZING RADIATION
SO INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS
LA English
DT Article
DE FGF2 peptide; Mitigation; Subtotal body irradiation; AGS; GI function
ID FIBROBLAST GROWTH FACTOR-2; STEM-CELLS; SELF-RENEWAL; PROLIFERATION;
RADIOPROTECTION; MICE; RECOVERY; THERAPY; KINASE; INJURY
AB Purpose: Acute gastrointestinal syndrome (AGS) resulting from ionizing radiation causes death within 7 days. Currently, no satisfactory agent exists for mitigation of AGS. A peptide derived from the receptor binding domain of fibroblast growth factor 2 (FGF-P) was synthesized and its mitigation effect on AGS was examined.
Methods and Materials: A subtotal body irradiation (sub-TBI) model was created to induce gastrointestinal (GI) death while avoiding bone marrow death. After 10.5 to 16 Gy sub-TBI, mice received an intramuscular injection of FGF-P (10 mg/kg/day) or saline (0.2 ml/day) for 5 days; survival (frequency and duration) was measured. Crypt cells and their proliferation were assessed by hematoxylin, eosin, and BrdU staining. In addition, GI hemoccult score, stool formation, and plasma levels of endotoxin, insulin, amylase, interleukin (IL)-6, keratinocyte-derived chemokine (KC) monocyte chemoattractant protein 1 (MCP-1) and tumor necrosis factor (TNF)-alpha were evaluated.
Results: Treatment with FGF-P rescued a significant fraction of four strains of mice (33-50%) exposed to a lethal dose of sub-TBI. Use of FGF-P improved crypt survival and repopulation and partially preserved or restored GI function. Furthermore, whereas sub-TBI increased plasma endotoxin levels and several pro-inflammation cytokines (IL-6, KC, MCP-1, and TNF-alpha), FGF-P reduced these adverse responses.
Conclusions: The study data support pursuing FGF-P as a mitigator for AGS. (C) 2010 Elsevier Inc.
C1 [Zhang, Lurong; Zhang, Mei; Yang, Shanmin; Vidyasagar, Sadasivan; Zhang, Kunzhong; Yin, Liangjie; Swarts, Steven G.; Fenton, Bruce M.; Keng, Peter C.; Okunieff, Paul] Univ Rochester, Med Ctr, Dept Radiat Oncol, Rochester, NY 14642 USA.
[Schaefer, Katherine L.; Saubermann, Lawrence J.] Univ Rochester, Med Ctr, Dept Med, Rochester, NY 14642 USA.
[Sun, Weimin; Wang, Jianjun; Tian, Yeping; Cao, Yongbing] Second Mil Med Coll, Shanghai, Peoples R China.
[Pena, Louis A.] Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA.
[Wang, Wei] Fujian Med Univ, Dept Surg, Affiliated Hosp 2, Quanzhou, Fujian, Peoples R China.
[Zhang, Lei] Sichuan Univ, W China Hosp, Dept Lab Med, Chengdu, Sichuan, Peoples R China.
RP Okunieff, P (reprint author), Univ Rochester, Med Ctr, Dept Radiat Oncol, 601 Elmwood Ave,Box 647, Rochester, NY 14642 USA.
EM Paul_Okunieff@URMC.Rochester.edu
RI ZHANG, MEI/F-8508-2011
FU Centers for Medical Countermeasures against Radiation program
[U19-AI067733]; National Institute of Allergy and Infectious Diseases
(NIAID); [1RC1AI078519-01]
FX This research was supported by 1RC1AI078519-01 and the Centers for
Medical Countermeasures against Radiation program, U19-AI067733,
National Institute of Allergy and Infectious Diseases (NIAID).
NR 28
TC 26
Z9 29
U1 0
U2 1
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0360-3016
EI 1879-355X
J9 INT J RADIAT ONCOL
JI Int. J. Radiat. Oncol. Biol. Phys.
PD MAY 1
PY 2010
VL 77
IS 1
BP 261
EP 268
DI 10.1016/j.ijrobp.2009.11.026
PG 8
WC Oncology; Radiology, Nuclear Medicine & Medical Imaging
SC Oncology; Radiology, Nuclear Medicine & Medical Imaging
GA 588XC
UT WOS:000277106900040
PM 20394858
ER
PT J
AU Wright, IG
Dooley, RB
AF Wright, I. G.
Dooley, R. B.
TI A review of the oxidation behaviour of structural alloys in steam
SO INTERNATIONAL MATERIALS REVIEWS
LA English
DT Review
DE High-temperature oxidation; Steam; Ferritic steels; Austenitic steels;
Ni-based alloys
ID HIGH-TEMPERATURE OXIDATION; FE-CR ALLOYS; OXIDE HYDROXIDE EVAPORATION;
AUSTENITIC STAINLESS-STEELS; IRON-CHROMIUM ALLOYS; LONG-TERM EXPOSURE;
COAL POWER-PLANTS; WATER-VAPOR; FERRITIC STEELS; SUPERHEATED STEAM
AB The focus of this review is the state of knowledge of the oxidation behaviour in steam of alloys with potential for use as pressure parts in steam boilers. The rate of oxide growth on steam-touched surfaces and the characteristics of that oxide are of increasing interest as the quest for improvements in cycle efficiency leads to progressively higher operating temperatures and pressures. The consequences of increased rate of growth of these oxides are of concern because of implications for tube overheating and oxide exfoliation. Mitigation of such problems requires a mechanistic understanding of the influences of alloy composition and microstructure, and especially of the evolution with time of specific scale structures. Similarly, the relative effects of factors such as time, temperature and operating parameters must be understood. The oxidation behaviour of the class of ferritic steels that forms the bulk of the heat transfer surface in steam boilers is of particular importance since alloys in the range 9-12% Cr (% in alloy compositions signifies weight percentage, unless indicated otherwise) are close to a transition from oxidation behaviour based on relatively thick Fe-based scales to the formation of much thinner, Cr-rich oxides. For austenitic steels protective behaviour in steam depends critically on the rapid development of a continuous Cr-rich oxide layer, otherwise oxide growth rates similar to the ferritic steels may result. Understanding the interplay among compositional and microstructural requirements for strengthening and oxidation resistance, and their influence on the rate and mode of scale evolution is key to the most effective application of these alloys. The oxidation behaviour of high-temperature Ni-based alloys in steam has received relatively little attention, but the broad range of alloying additions considered, compared to austenitic steels, has the potential to contribute in different ways to the scale morphologies and oxidation behaviour. Underlying these interests is the apparently significant contribution to oxide growth in steam from inward transport of oxidant species that likely involve hydrogen. The particular species involved and their roles in the oxidation process are expected to exert a large influence on the oxide morphologies developed, while the fate of any hydrogen released in the alloy is a further topic of particular interest.
C1 [Wright, I. G.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Dooley, R. B.] Struct Integr Associates Inc, Charlotte, NC USA.
RP Wright, IG (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN USA.
EM wrightig@ornl.gov
FU US Department of Energy, Office of Fossil Energy (DOE-FE)
[DE-AC05-00OR22725]; Electric Power Research Institute (EPRI)
[EP-P18842/C9306]
FX The research programmes that provided support for this effort were
funded by the US Department of Energy, Office of Fossil Energy (DOE-FE)
under contract no. DE-AC05-00OR22725 with UT-Battelle, LLC and by the
Electric Power Research Institute (EPRI) under a Work for Others
programme (agreement no. EP-P18842/C9306) with DOE-FE. The authors
express their gratitude to numerous colleagues, not only for providing
access to reports and other documentation, but also for their advice and
critical comment during the preparation of this review. We particularly
wish to thank Nobio Otsuka of Sumitomo Metals and Kent Coleman of EPRI
for providing samples of tubes from service that are used as examples in
the review. For new material taken from work in progress at Oak Ridge
National Laboratory (ORNL) we acknowledge the technical expertise of
Tracie Brummett, Dorothy Coffey, Jane Howe, Mike Howell, Hu Longmire and
Larry Walker. Also, we would like to thank Bruce Pint and Peter
Tortorelli, of Oak Ridge National Laboratory for reviewing the
manuscript.
NR 160
TC 89
Z9 101
U1 10
U2 76
PU MANEY PUBLISHING
PI LEEDS
PA STE 1C, JOSEPHS WELL, HANOVER WALK, LEEDS LS3 1AB, W YORKS, ENGLAND
SN 0950-6608
J9 INT MATER REV
JI Int. Mater. Rev.
PD MAY
PY 2010
VL 55
IS 3
BP 129
EP 167
DI 10.1179/095066010X12646898728165
PG 39
WC Materials Science, Multidisciplinary
SC Materials Science
GA 593HZ
UT WOS:000277445100001
ER
PT J
AU Godoy-Vitorino, F
Goldfarb, KC
Brodie, EL
Garcia-Amado, MA
Michelangeli, F
Dominguez-Bello, MG
AF Godoy-Vitorino, Filipa
Goldfarb, Katherine C.
Brodie, Eoin L.
Garcia-Amado, Maria A.
Michelangeli, Fabian
Dominguez-Bello, Maria G.
TI Developmental microbial ecology of the crop of the folivorous hoatzin
SO ISME JOURNAL
LA English
DT Article
DE bacteria; bird; crop; folivore; hoatzin; succession
ID BACTERIAL POPULATION; OPISTHOCOMUS-HOAZIN; MATHEMATICAL-THEORY;
COMMUNITY ECOLOGY; NEUTRAL THEORY; DIVERSITY; GUT; ENVIRONMENT; RUMEN;
COMMUNICATION
AB The hoatzin (Opisthocomus hoazin) is a South American strict folivorous bird, with a crop microbial ecosystem that ferments dietary plants. Chicks progressively become independent from the adult-fed regurgitated crop liquids, and we hypothesized that the crop bacterial ecosystem develops through ecological succession mechanisms, as they grow into adults. The aim of this work was to compare the crop bacterial community in hoatzins from three age groups: newly hatched chicks, juveniles and adults by sequencing 16S rRNA genes and using the G2 PhyloChip. Cloning yielded a total of 2123 nearly full-length sequences binned into 294 operational taxonomic units (OTUs) (with <97% homology) belonging to 7 phyla, with 91% of novel OTUs. The microarray identified a diverse bacterial community dominated by Firmicutes and Bacteroidetes, with similar to 1400 taxa grouped in 40 phyla that included those detected by cloning. In comparison with the adult, the hoatzin chick crop had a greater abundance of Flavobacteriaceae, Clostridiaceae and Lachnospiraceae but lacked phyla DSS1, Deferribacteres and Termite group 1, which were mostly present in adults. The overall community structure of the crop of the hoatzin changes with age in a complex manner, probably responding to new niches made available through dietary changes related to the transition from dependent to independent feeding. The ISME Journal (2010) 4, 611-620; doi:10.1038/ismej.2009.147; published online 4 February 2010
C1 [Godoy-Vitorino, Filipa; Dominguez-Bello, Maria G.] Univ Puerto Rico, Dept Biol, San Juan, PR 00931 USA.
[Goldfarb, Katherine C.; Brodie, Eoin L.] Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Ecol, Div Earth Sci, Berkeley, CA 94720 USA.
[Garcia-Amado, Maria A.; Michelangeli, Fabian] Inst Venezolano Invest Cient, Ctr Biophys & Biochem, Caracas, Venezuela.
RP Dominguez-Bello, MG (reprint author), Univ Puerto Rico, Dept Biol, Rio Piedras Campus,POB 23360, San Juan, PR 00931 USA.
EM mgdbello@uprr.pr
RI Garcia Amado, Maria Alexandra/B-5297-2015; Brodie, Eoin/A-7853-2008;
OI Brodie, Eoin/0000-0002-8453-8435; Garcia-Amado, Maria
Alexandra/0000-0001-6396-4681
FU NSF [IOS 0716911, DDIG 0709840, CREST HRD0206200]; UPR [FIPI 8-80314]
FX This work was supported by grants from NSF: IOS 0716911, DDIG 0709840,
CREST HRD0206200 and UPR Grant FIPI 8-80314. Part of this work was
performed at Lawrence Berkeley National Laboratory under the auspices of
the University of California-Contract Number DE-AC02-05CH11231. We thank
Todd DeSantis for developing and assisting with the G2 chip taxonomy
classifier and Humberto Ortiz for helping with python scripts including
the BLAST parser. The Logistic field support from Hato Mataclara
personnel Jose, Juan and Antonio Gonzalez, and the issuing of permits by
the Venezuelan Ministry of Environment are deeply appreciated.
NR 59
TC 20
Z9 21
U1 0
U2 26
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 1751-7362
J9 ISME J
JI ISME J.
PD MAY
PY 2010
VL 4
IS 5
BP 611
EP 620
DI 10.1038/ismej.2009.147
PG 10
WC Ecology; Microbiology
SC Environmental Sciences & Ecology; Microbiology
GA 589PI
UT WOS:000277164000002
PM 20130656
ER
PT J
AU Engelbrektson, A
Kunin, V
Wrighton, KC
Zvenigorodsky, N
Chen, F
Ochman, H
Hugenholtz, P
AF Engelbrektson, Anna
Kunin, Victor
Wrighton, Kelly C.
Zvenigorodsky, Natasha
Chen, Feng
Ochman, Howard
Hugenholtz, Philip
TI Experimental factors affecting PCR-based estimates of microbial species
richness and evenness
SO ISME JOURNAL
LA English
DT Article
DE 16S rRNA; diversity estimates; microbial community; pyrosequencing;
termite
ID RIBOSOMAL-RNA GENE; COMMUNITY STRUCTURE; RARE BIOSPHERE; DIVERSITY;
TERMITE
AB Pyrosequencing of 16S rRNA gene amplicons for microbial community profiling can, for equivalent costs, yield more than two orders of magnitude more sensitivity than traditional PCR cloning and Sanger sequencing. With this increased sensitivity and the ability to analyze multiple samples in parallel, it has become possible to evaluate several technical aspects of PCR-based community structure profiling methods. We tested the effect of amplicon length and primer pair on estimates of species richness (number of species) and evenness (relative abundance of species) by assessing the potentially tractable microbial community residing in the termite hindgut. Two regions of the 16S rRNA gene were sequenced from one of two common priming sites, spanning the V1-V2 or V8 regions, using amplicons ranging in length from 352 to 1443 bp. Our results show that both amplicon length and primer pair markedly influence estimates of richness and evenness. However, estimates of species evenness are consistent among different primer pairs targeting the same region. These results highlight the importance of experimental methodology when comparing diversity estimates across communities. The ISME Journal (2010) 4, 642-647; doi:10.1038/ismej.2009.153; published online 21 January 2010
C1 [Hugenholtz, Philip] US DOE, Microbial Ecol Program, Joint Genome Inst, Walnut Creek, CA 94598 USA.
[Wrighton, Kelly C.] Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA.
[Ochman, Howard] Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ USA.
RP Hugenholtz, P (reprint author), US DOE, Microbial Ecol Program, Joint Genome Inst, 2800 Mitchell Dr,Bldg 400, Walnut Creek, CA 94598 USA.
EM phugenholtz@lbl.gov
RI Hugenholtz, Philip/G-9608-2011; Engelbrektson, Anna/K-5563-2012;
Engelbrektson, Anna/F-1687-2013
FU Simon Family Fund; US Department of Energy; University of California,
Lawrence Berkeley National Laboratory [DE-AC02-05CH11231]; Lawrence
Livermore National Laboratory [DE-AC52-07NA27344]; Los Alamos National
Laboratory [DE-AC02-06NA25396]
FX We thank Rudolf Scheffrahn and Falk Warnecke for providing termites and
Rebecca Daly for discussions about statistical analyses. VK was
supported in part by NSF Grant no. OPP0632359 and KW by a Chang-Lin Tien
Scholarship in Environmental Sciences and Biodiversity. The study was
also supported by a grant from the Simon Family Fund and was performed
under the auspices of the US Department of Energy's Office of Science,
Biological and Environmental Research Program, as well as by the
University of California, Lawrence Berkeley National Laboratory under
contract no. DE-AC02-05CH11231, Lawrence Livermore National Laboratory
under contract no. DE-AC52-07NA27344 and Los Alamos National Laboratory
under contract no. DE-AC02-06NA25396. In memory of FWN Hugenholtz
(1924-2009).
NR 17
TC 251
Z9 253
U1 7
U2 76
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 1751-7362
J9 ISME J
JI ISME J.
PD MAY
PY 2010
VL 4
IS 5
BP 642
EP 647
DI 10.1038/ismej.2009.153
PG 6
WC Ecology; Microbiology
SC Environmental Sciences & Ecology; Microbiology
GA 589PI
UT WOS:000277164000005
PM 20090784
ER
PT J
AU Hemme, CL
Deng, Y
Gentry, TJ
Fields, MW
Wu, LY
Barua, S
Barry, K
Tringe, SG
Watson, DB
He, ZL
Hazen, TC
Tiedje, JM
Rubin, EM
Zhou, JZ
AF Hemme, Christopher L.
Deng, Ye
Gentry, Terry J.
Fields, Matthew W.
Wu, Liyou
Barua, Soumitra
Barry, Kerrie
Tringe, Susannah G.
Watson, David B.
He, Zhili
Hazen, Terry C.
Tiedje, James M.
Rubin, Edward M.
Zhou, Jizhong
TI Metagenomic insights into evolution of a heavy metal-contaminated
groundwater microbial community
SO ISME JOURNAL
LA English
DT Article
DE metagenomics; microbial ecology; bioremediation
ID HORIZONTAL GENE-TRANSFER; ESCHERICHIA-COLI; DNA; GENOMICS; ENVIRONMENT;
METABOLISM; MICROARRAY; DIVERSITY; FRAGMENTS; RESPONSES
AB Understanding adaptation of biological communities to environmental change is a central issue in ecology and evolution. Metagenomic analysis of a stressed groundwater microbial community reveals that prolonged exposure to high concentrations of heavy metals, nitric acid and organic solvents (similar to 50 years) has resulted in a massive decrease in species and allelic diversity as well as a significant loss of metabolic diversity. Although the surviving microbial community possesses all metabolic pathways necessary for survival and growth in such an extreme environment, its structure is very simple, primarily composed of clonal denitrifying gamma-and beta-proteobacterial populations. The resulting community is overabundant in key genes conferring resistance to specific stresses including nitrate, heavy metals and acetone. Evolutionary analysis indicates that lateral gene transfer could have a key function in rapid response and adaptation to environmental contamination. The results presented in this study have important implications in understanding, assessing and predicting the impacts of human-induced activities on microbial communities ranging from human health to agriculture to environmental management, and their responses to environmental changes. The ISME Journal (2010) 4, 660-672; doi:10.1038/ismej.2009.154; published online 25 February 2010
C1 [Hemme, Christopher L.; Deng, Ye; Wu, Liyou; Barua, Soumitra; He, Zhili; Zhou, Jizhong] Univ Oklahoma, Inst Environm Genom, Dept Bot & Microbiol, Norman, OK 73019 USA.
[Hemme, Christopher L.; Gentry, Terry J.; Wu, Liyou; Barua, Soumitra; Watson, David B.; Zhou, Jizhong] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
[Gentry, Terry J.] Texas A&M Univ, Dept Soil Sci, College Stn, TX USA.
[Fields, Matthew W.] Montana State Univ, Dept Microbiol, Bozeman, MT 59717 USA.
[Barry, Kerrie; Tringe, Susannah G.; Rubin, Edward M.] US DOE, Joint Genome Inst, Walnut Creek, CA USA.
[Hazen, Terry C.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
[Tiedje, James M.] Michigan State Univ, Ctr Microbial Ecol, Dept Soil & Crop Sci, E Lansing, MI 48824 USA.
RP Zhou, JZ (reprint author), Univ Oklahoma, Inst Environm Genom, Dept Bot & Microbiol, 101 David L Boren Blvd, Norman, OK 73019 USA.
EM jzhou@rccc.ou.edu
RI Deng, Ye/A-2571-2013; Watson, David/C-3256-2016; Hazen,
Terry/C-1076-2012;
OI Watson, David/0000-0002-4972-4136; Hazen, Terry/0000-0002-2536-9993;
Tringe, Susannah/0000-0001-6479-8427; ?, ?/0000-0002-7584-0632
FU United States Department of Energy; Office of Biological and
Environmental Research, Office of Science; University of California,
Lawrence Berkeley National Laboratory [DE-AC02-05CH11231]; Lawrence
Livermore National Laboratory [DE-AC52-07NA27344]; Los Alamos National
Laboratory [DE-AC02-06NA25396]
FX We thank Dr Fares Najar and Dr Bruce Roe for providing sequencing
services, and Dr Tommy Phelps and Dr Christopher W Schadt for assisting
groundwater sampling. This research was supported by The United States
Department of Energy under the Environmental Remediation Sciences
Program (ERSP), and Genomics: GTL program through the Virtual Institute
of Microbial Stress and Survival (VIMSS; http://vimss.lbl.gov), Office
of Biological and Environmental Research, Office of Science, and by the
University of California, Lawrence Berkeley National Laboratory under
Contract No. DE-AC02-05CH11231, Lawrence Livermore National Laboratory
under Contract No. DE-AC52-07NA27344, and Los Alamos National Laboratory
under Contract No. DE-AC02-06NA25396. Oak Ridge National Laboratory is
managed by University of Tennessee UT-Battelle LLC for the Department of
Energy under Contract No. DE-AC05-00OR22725. All authors contributed
intellectual input and assistance to this study and paper preparation.
The original concept and experimental strategy were developed by JZ and
MWF. Sampling collections and DNA preparation were performed by TG and
LW. DW performed chemical analysis of the groundwater sample. KB and SGT
oversaw metagenomic sequencing and assembly. CH performed all sequence
and evolutionary analysis. YD assisted in computational analysis of
metagenome sequences. SB performed PCR experiments for population
genetics analysis and LGT confirmation. JZ and CH performed data
synthesis, and took the lead in writing the paper.
NR 50
TC 112
Z9 115
U1 7
U2 91
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 1751-7362
J9 ISME J
JI ISME J.
PD MAY
PY 2010
VL 4
IS 5
BP 660
EP 672
DI 10.1038/ismej.2009.154
PG 13
WC Ecology; Microbiology
SC Environmental Sciences & Ecology; Microbiology
GA 589PI
UT WOS:000277164000007
PM 20182523
ER
PT J
AU Kuramae, EE
Gamper, HA
Yergeau, E
Piceno, YM
Brodie, EL
DeSantis, TZ
Andersen, GL
van Veen, JA
Kowalchuk, GA
AF Kuramae, Eiko E.
Gamper, Hannes A.
Yergeau, Etienne
Piceno, Yvette M.
Brodie, Eoin L.
DeSantis, Todd Z.
Andersen, Gary L.
van Veen, Johannes A.
Kowalchuk, George A.
TI Microbial secondary succession in a chronosequence of chalk grasslands
SO ISME JOURNAL
LA English
DT Article
DE phylogenetic microarray; secondary succession; microbial community; soil
biochemistry; pH
ID 16S RIBOSOMAL-RNA; CALCAREOUS GRASSLANDS; BACTERIAL COMMUNITY; CLONE
LIBRARY; SOIL; DIVERSITY; REVEALS; BIOMASS
AB Although secondary succession has been studied extensively, we have little knowledge of the succession of soil-borne microbial communities. In this study, we therefore examined the structures of the microbial communities across two separate chronosequences of chalk grasslands in Limburg, the Netherlands, which are at different stages of secondary succession after being abandoned for between 17 and >66 years. Arable fields were also included in the investigation as non-abandoned references. Changes in the soil-borne microbial communities, as determined by phylogenetic microarray and quantitative PCR methodologies, were correlated with the prevailing environmental conditions related to vegetation and soil biochemistry. We observed clear patterns of microbial secondary succession related to soil age, pH and phosphate status, as exemplified by the overrepresentation of Verrucomicrobia, Acidobacteria, Gemmatimonadetes, and alpha-, delta-and epsilon-Proteobacteria at late successional stages. Moreover, effects of secondary succession versus changes in soil pH could be resolved, with pH significantly altering the trajectory of microbial succession. The ISME Journal (2010) 4, 711-715; doi:10.1038/ismej.2010.11; published online 18 February 2010
C1 [Kuramae, Eiko E.; Gamper, Hannes A.; Yergeau, Etienne; van Veen, Johannes A.; Kowalchuk, George A.] Netherlands Inst Ecol NIOO KNAW, Dept Microbial Ecol, Heteren, Netherlands.
[Kuramae, Eiko E.; Kowalchuk, George A.] Free Univ Amsterdam, Inst Ecol Sci, Amsterdam, Netherlands.
[Yergeau, Etienne] Natl Res Council Canada, Biotechnol Res Inst, Montreal, PQ H4P 2R2, Canada.
[Piceno, Yvette M.; Brodie, Eoin L.; DeSantis, Todd Z.; Andersen, Gary L.] Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Ecol, Berkeley, CA 94720 USA.
[van Veen, Johannes A.] Leiden Univ, Inst Biol, Leiden, Netherlands.
RP Kowalchuk, GA (reprint author), Netherlands Inst Ecol, Dept Microbial Ecol, Boterhoeksestr 48,POB 40, Heteren, Netherlands.
EM g.kowalchuk@nioo.knaw.nl
RI Piceno, Yvette/I-6738-2016; Yergeau, Etienne/B-5344-2008; Kowalchuk,
George/C-4298-2011; van Veen, Johannes/C-3697-2011; Pijl, A/D-4220-2012;
Brodie, Eoin/A-7853-2008; Andersen, Gary/G-2792-2015; Kuramae,
Eiko/F-4738-2012
OI Piceno, Yvette/0000-0002-7915-4699; Yergeau,
Etienne/0000-0002-7112-3425; Brodie, Eoin/0000-0002-8453-8435; Andersen,
Gary/0000-0002-1618-9827; Kuramae, Eiko/0000-0001-6701-8668
FU 'Ecogenomics'
FX We thank Lina C Wong and Agata S Pijl for laboratory assistance, and
Wiecher Smant for soil chemical analysis. This work was supported by the
Bsik program of 'Ecogenomics' (http://www.ecogenomics.nl/). Publication
number 4732 of the NIOO-KNAW, Netherlands Institute of Ecology.
NR 19
TC 22
Z9 23
U1 3
U2 31
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 1751-7362
J9 ISME J
JI ISME J.
PD MAY
PY 2010
VL 4
IS 5
BP 711
EP 715
DI 10.1038/ismej.2010.11
PG 5
WC Ecology; Microbiology
SC Environmental Sciences & Ecology; Microbiology
GA 589PI
UT WOS:000277164000011
PM 20164861
ER
PT J
AU Laskey, WK
Feinendegen, LE
Neumann, RD
Dilsizian, V
AF Laskey, Warren K.
Feinendegen, Ludwig E.
Neumann, Ronald D.
Dilsizian, Vasken
TI Low-Level Ionizing Radiation From Noninvasive Cardiac Imaging: Can We
Extrapolate Estimated Risks From Epidemiologic Data to the Clinical
Setting?
SO JACC-CARDIOVASCULAR IMAGING
LA English
DT Article
DE radiation; imaging; risk
ID ATOMIC-BOMB SURVIVORS; CANCER-RISKS; EXPOSURE; MORTALITY; RESPONSES
AB Clinical decision-making regarding the use of low-level ionizing radiation for diagnostic and/or therapeutic purposes in patients with cardiovascular disease must, as in all other clinical scenarios, encompass the broad range of the risk-benefit ratio. Concerns regarding the late carcinogenic effects of exposure to low levels, i.e., <100 mSv, of ionizing radiation stem from extrapolation of exposure-outcome data in survivors of World War II atomic bomb explosions. However, ongoing debate regarding the true incremental risk to subjects exposed to doses currently administered in cardiovascular procedures fails to take into account the uncertainty of the dose-response relationship in this lower range, as well as tissue-specific reparative responses, also manifest at lower levels of exposure. The present discussion draws attention to both of these aspects as they relate to clinical decision-making. (J Am Coll Cardiol Img 2010;3:517-24) (C) 2010 by the American College of Cardiology Foundation
C1 [Laskey, Warren K.] Univ New Mexico, Sch Med, Dept Med, Albuquerque, NM 87131 USA.
[Feinendegen, Ludwig E.] Univ Dusseldorf, Dusseldorf, Germany.
[Feinendegen, Ludwig E.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Neumann, Ronald D.] NIH, Dept Med Imaging, Ctr Clin, Bethesda, MD 20892 USA.
[Dilsizian, Vasken] Univ Maryland, Sch Med, Dept Diagnost Radiol & Nucl Med, Baltimore, MD 21201 USA.
RP Laskey, WK (reprint author), Univ New Mexico, Sch Med, Dept Med, MSC10-5550, Albuquerque, NM 87131 USA.
EM wlaskey@salud.unm.edu
NR 29
TC 26
Z9 26
U1 1
U2 1
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1936-878X
J9 JACC-CARDIOVASC IMAG
JI JACC-Cardiovasc. Imag.
PD MAY
PY 2010
VL 3
IS 5
BP 517
EP 524
DI 10.1016/j.jcmg.2009.11.017
PG 8
WC Cardiac & Cardiovascular Systems; Radiology, Nuclear Medicine & Medical
Imaging
SC Cardiovascular System & Cardiology; Radiology, Nuclear Medicine &
Medical Imaging
GA 647NW
UT WOS:000281626200009
PM 20466348
ER
PT J
AU Heidloff, AJ
Rieken, JR
Anderson, IE
Byrd, D
Sears, J
Glynn, M
Ward, RM
AF Heidloff, A. J.
Rieken, J. R.
Anderson, I. E.
Byrd, D.
Sears, J.
Glynn, M.
Ward, R. M.
TI Advanced Gas Atomization Processing for Ti and Ti Alloy Powder
Manufacturing
SO JOM
LA English
DT Article
ID TITANIUM
AB A multi-layer ceramic composite melt pour tube for superheating and pouring of molten Ti-6Al-4V (wt.%) was tested using an existing Ti atomization system. Free fall gas atomization was conducted with the pour tube while liquid metal temperatures were measured in situ using a two-color optical pyrometer. Post-process pour tube erosion was compared with preprocess matching surfaces, and minimal change in interior liner thickness was found. Microstructural analysis. phase identification, and composition determination of the resulting gas-atomized powder indicated minimal contamination from the composite pour tube despite very high liquid superheat, approaching 300 degrees C. Hot isostatic pressing of the powder resulted in mechanical properties exceeding the MIL-T-9047 standard for Ti-6Al-4V
C1 [Heidloff, A. J.; Anderson, I. E.; Byrd, D.] Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
[Sears, J.] S Dakota Sch Mines & Technol, Rapid City, SD USA.
[Sears, J.] Quad Cities Mfg Lab, Rapid City, SD USA.
[Glynn, M.; Ward, R. M.] Univ Birmingham, Interdisciplinary Res Ctr, Birmingham B15 2TT, W Midlands, England.
RP Heidloff, AJ (reprint author), Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
EM andersoni@ameslab.gov
RI Ward, Robin/B-2353-2012
FU Iowa State University Research Foundation through Ames Laboratory
(USDOE) [DE-AC02-07CH1135S]
FX Support from the Iowa State University Research Foundation is gratefully
acknowledged through Ames Laboratory (USDOE) contract no.
DE-AC02-07CH1135S.
NR 31
TC 5
Z9 7
U1 3
U2 38
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1047-4838
J9 JOM-US
JI JOM
PD MAY
PY 2010
VL 62
IS 5
BP 35
EP 41
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Mineralogy; Mining & Mineral Processing
SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy;
Mining & Mineral Processing
GA 594LP
UT WOS:000277539500008
ER
PT J
AU Nowakowski, DJ
Bridgwater, AV
Elliott, DC
Meier, D
de Wild, P
AF Nowakowski, D. J.
Bridgwater, A. V.
Elliott, D. C.
Meier, D.
de Wild, P.
TI Lignin fast pyrolysis: Results from an international collaboration
SO JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
LA English
DT Article
DE Fast pyrolysis; Lignin; Bio-oil; Fluidized-bed
ID BIOMASS
AB An international study of fast pyrolysis of lignin was undertaken. Fourteen laboratories in eight different countries contributed. Two lignin samples were distributed to the laboratories for analysis and bench-scale process testing in fast pyrolysis. Analyses included proximate and ultimate analysis, thermogravimetric analysis, and analytical pyrolysis. The bench-scale test included bubbling fluidized-bed reactors and entrained-flow systems. Based on the results of the various analyses and tests it was concluded that a concentrated lignin (estimated at about 50% lignin and 50% cellulose) behaved like a typical biomass, producing a slightly reduced amount of a fairly typical bio-oil, while a purified lignin material was difficult to process in the fast pyrolysis reactors and produced a much lower amount of a different kind of bio-oil. It was concluded that for highly concentrated lignin feedstocks new reactor designs will be required other than the typical fluidized-bed fast pyrolysis systems. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Elliott, D. C.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Nowakowski, D. J.; Bridgwater, A. V.] Aston Univ, Birmingham B4 7ET, W Midlands, England.
[Meier, D.] VTI Inst Wood Technol & Wood Biol, Hamburg, Germany.
[de Wild, P.] ECN, Petten, Netherlands.
RP Elliott, DC (reprint author), Pacific NW Natl Lab, POB 999,MSIN P8-60, Richland, WA 99352 USA.
EM dougc.elliott@pnl.gov
NR 6
TC 152
Z9 160
U1 8
U2 103
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0165-2370
J9 J ANAL APPL PYROL
JI J. Anal. Appl. Pyrolysis
PD MAY
PY 2010
VL 88
IS 1
BP 53
EP 72
DI 10.1016/j.jaap.2010.02.009
PG 20
WC Chemistry, Analytical; Spectroscopy
SC Chemistry; Spectroscopy
GA 602SU
UT WOS:000278159900007
ER
PT J
AU McEniry, J
O'Kiely, P
Clipson, NJW
Forristal, PD
Doyle, EM
AF McEniry, J.
O'Kiely, P.
Clipson, N. J. W.
Forristal, P. D.
Doyle, E. M.
TI Assessing the impact of various ensilage factors on the fermentation of
grass silage using conventional culture and bacterial community analysis
techniques
SO JOURNAL OF APPLIED MICROBIOLOGY
LA English
DT Article
DE air infiltration; bacterial community; compaction; dry matter; ensiling
system; grass silage
ID 16S RIBOSOMAL-RNA; CHEMICAL-COMPOSITION; FUNGAL COMMUNITIES; DYNAMICS;
DIVERSITY; GRADIENT; GENES; PCR
AB Aims:
Grass silage is an important ruminant feedstuff on farms during winter. The ensilage of grass involves a natural lactic acid bacterial fermentation under anaerobic conditions, and numerous factors can influence the outcome of preservation. The aim of this study was to investigate the effect of dry matter concentration, ensiling system, compaction and air infiltration on silage bacterial community composition.
Methods and Results:
The impact of these factors was examined using conventional methods of microbial analysis and culture-independent Terminal Restriction Fragment Length Polymorphism (T-RFLP). Silage fermentation was restricted in herbage with a high dry matter concentration, and this was reflected in a shift in the bacterial population present. In contrast, ensiling system had little effect on bacterial community composition. Air infiltration, in the absence of compaction, altered silage bacterial community composition and silage pH.
Conclusions:
Dry matter concentration and the absence of compaction were the main factors affecting silage microbial community composition, and this was reflected in both the conventional culture-based and T-RFLP data.
Significance and Impact of the Study:
T-RFLP proved a useful tool to study the factors affecting ensilage. Apart from monitoring the presence or absence of members of the population, shifts in the relative presence of members could be monitored.
C1 [McEniry, J.; Clipson, N. J. W.; Doyle, E. M.] Univ Coll Dublin, Sch Biol & Environm Sci, Dublin 4, Ireland.
[McEniry, J.; O'Kiely, P.] TEAGASC, Grange Beef Res Ctr, Dunsany, Meath, Ireland.
[Forristal, P. D.] TEAGASC, Crops Res Ctr, Oak Pk, Co Carlow, Ireland.
RP Doyle, EM (reprint author), Univ Coll Dublin, Sch Biol & Environm Sci, Dublin 4, Ireland.
EM evelyn.doyle@ucd.ie
FU Deirdre Rooney. A Teagasc Walsh Fellowship Research Scholarship
FX The authors thank Mr J. Hamill for his technical assistance, Grange farm
staff (especially Mr J. Lynch for assistance in silage making, storing
and sampling) and the staff of Grange laboratories who undertook some of
the chemical assays. We also acknowledge valuable discussions with
Deirdre Rooney. A Teagasc Walsh Fellowship Research Scholarship awarded
to J. McEniry supported this study.
NR 26
TC 7
Z9 7
U1 0
U2 10
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1364-5072
J9 J APPL MICROBIOL
JI J. Appl. Microbiol.
PD MAY
PY 2010
VL 108
IS 5
BP 1584
EP 1593
DI 10.1111/j.1365-2672.2009.04557.x
PG 10
WC Biotechnology & Applied Microbiology; Microbiology
SC Biotechnology & Applied Microbiology; Microbiology
GA 581EH
UT WOS:000276503800010
PM 19863691
ER
PT J
AU Chaudhury, RP
Lorenz, B
Sun, YY
Bezmaternykh, LN
Temerov, VL
Chu, CW
AF Chaudhury, R. P.
Lorenz, B.
Sun, Y. Y.
Bezmaternykh, L. N.
Temerov, V. L.
Chu, C. W.
TI Magnetic phase diagram and magnetoelectric properties of
Ho0.25Nd0.75Fe3(BO3)(4)
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article; Proceedings Paper
CT 11th Joint MMM-Intermag Conference
CY JAN 18-22, 2010
CL Washington, DC
ID MULTIFERROICS
AB The magnetic and magnetoelectric properties of a single crystal of Ho0.25Nd0.75Fe3(BO3)(4) have been investigated along the main crystallographic directions. The spontaneous polarization starts increasing below the Neel temperature T-N similar to 32 K and it displays a sudden drop at 4.8 K. This sharp decrease suggests the existence of a spin reorientation phase transition. In this compound, both spontaneous polarization and the polarization due to the magnetoelectric effect exist. Detailed study of the effect of magnetic field on the polarization and the spin rotation transition has been performed. Specific heat and magnetization measurements show characteristic anomalies at both magnetic transitions. The magnetic field (H)-temperature phase diagram has completely been resolved for H parallel to c and H parallel to a axes. (C) 2010 American Institute of Physics. [doi:10.1063/1.3362915]
C1 [Chaudhury, R. P.; Lorenz, B.; Sun, Y. Y.; Chu, C. W.] Univ Houston, Dept Phys, Houston, TX 77204 USA.
[Chaudhury, R. P.; Lorenz, B.; Sun, Y. Y.; Chu, C. W.] Univ Houston, TCSUH, Houston, TX 77204 USA.
[Bezmaternykh, L. N.; Temerov, V. L.] Russian Acad Sci, Siberian Div, Inst Phys, Krasnoyarsk 660036, Russia.
[Chu, C. W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Chaudhury, RP (reprint author), Univ Houston, Dept Phys, Houston, TX 77204 USA.
EM rajit.chaudhury@mail.uh.edu
NR 7
TC 4
Z9 4
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 1
PY 2010
VL 107
IS 9
AR 09D913
DI 10.1063/1.3362915
PG 3
WC Physics, Applied
SC Physics
GA 598KC
UT WOS:000277834300318
ER
PT J
AU Gooch, M
Lv, B
Lorenz, B
Guloy, AM
Chu, CW
AF Gooch, M.
Lv, B.
Lorenz, B.
Guloy, A. M.
Chu, C. W.
TI Critical scaling of transport properties in the phase diagram of iron
pnictide superconductors KxSr(1-x)Fe(2)As(2) and KxBa(1-x)Fe(2)As(2)
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article; Proceedings Paper
CT 11th Joint MMM-Intermag Conference
CY JAN 18-22, 2010
CL Washington, DC
ID LAYERED QUATERNARY COMPOUND; QUANTUM CRITICAL-POINT; 43 K
AB We present a systematic study of resistivity and thermoelectric power for iron pnictide systems KxSr1-xFe2As2 and KxBa1-xFe2As2 for 0 < x < 1. Both systems show a similar phase diagram with an antiferromagnetic (AFM) phase on the low-doping side and a superconducting dome-shaped phase at higher doping. The AFM phase intersects the superconducting phase boundary. The extrapolation of the AFM phase boundary to zero temperature defines a critical doping of x(c) similar to 0.4. We show that the electrical and thermoelectric transport properties above the superconducting T-c obey a characteristic temperature scaling behavior at x(c). The crossover and scaling property indicates the existence of a (possibly hidden) magnetic quantum critical point in the phase diagram of the 122 iron pnictides. The results of this investigation prove the significance of magnetic fluctuations in iron pnictide superconductors. (C) 2010 American Institute of Physics. [doi:10.1063/1.3362932]
C1 [Gooch, M.; Lv, B.; Lorenz, B.; Chu, C. W.] Univ Houston, Dept Phys, Houston, TX 77204 USA.
[Gooch, M.; Lv, B.; Lorenz, B.; Guloy, A. M.; Chu, C. W.] Univ Houston, TCSUH, Houston, TX 77204 USA.
[Chu, C. W.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Gooch, M (reprint author), Univ Houston, Dept Phys, Houston, TX 77204 USA.
EM mjgooch@mail.uh.edu
RI Lv, Bing/E-3485-2010
NR 27
TC 2
Z9 2
U1 0
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 1
PY 2010
VL 107
IS 9
AR 09E145
DI 10.1063/1.3362932
PG 3
WC Physics, Applied
SC Physics
GA 598KC
UT WOS:000277834300369
ER
PT J
AU Grutter, A
Wong, F
Arenholz, E
Liberati, M
Suzuki, Y
AF Grutter, Alexander
Wong, Franklin
Arenholz, Elke
Liberati, Marco
Suzuki, Yuri
TI Enhanced magnetization in epitaxial SrRuO3 thin films via
substrate-induced strain
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article; Proceedings Paper
CT 11th Joint MMM-Intermag Conference
CY JAN 18-22, 2010
CL Washington, DC
ID SINGLE-CRYSTAL; DIFFRACTION
AB Epitaxial SrRuO3 thin films were grown on SrTiO3, (LaAlO3)(0.3)(Sr2AlTaO6)(0.7), and LaAlO3 substrates inducing different compressive strains. Coherently strained SrRuO3 films exhibit enhanced magnetization compared to previously reported bulk and thin film values of 1.1-1.6 mu(B) per formula unit. A comparison of (001) SrRuO3 films on each substrate indicates that strained films have consistently higher saturated moments than corresponding relaxed films, which exhibit bulk moments. These observations indicate the importance of lattice distortions in controlling the magnetic ground state in this transitional metal oxide. (C) 2010 American Institute of Physics. [doi:10.1063/1.3360345]
C1 [Grutter, Alexander; Wong, Franklin; Suzuki, Yuri] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
[Grutter, Alexander; Suzuki, Yuri] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Arenholz, Elke; Liberati, Marco] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Grutter, A (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
EM alexander.grutter@gmail.com
NR 15
TC 15
Z9 15
U1 1
U2 12
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 1
PY 2010
VL 107
IS 9
AR 09E138
DI 10.1063/1.3360345
PG 3
WC Physics, Applied
SC Physics
GA 598KC
UT WOS:000277834300362
ER
PT J
AU Haldar, A
Singh, NK
Mudryk, Y
Nayak, AK
Suresh, KG
Nigam, AK
Pecharsky, VK
AF Haldar, Arabinda
Singh, Niraj K.
Mudryk, Ya.
Nayak, Ajaya K.
Suresh, K. G.
Nigam, A. K.
Pecharsky, V. K.
TI Magnetostructural transition in Ce(Fe0.975Ga0.025)(2) compound
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article; Proceedings Paper
CT 11th Joint MMM-Intermag Conference
CY JAN 18-22, 2010
CL Washington, DC
ID MANGANITES; MN; MAGNETIZATION; AVALANCHE
AB The magnetic and magnetostructural properties of the polycrystalline Ce(Fe0.975Ga0.025)(2) have been investigated as a function of temperature and magnetic field. In Ce(Fe0.975Ga0.025)(2) the magnetic transition from antiferromagnetic (AFM) to ferromagnetic (FM) state is accompanied by a structural transformation from rhombohedral to cubic structure. Phase coexistence is present during both the temperature and field driven transformations from AFM to FM phase. (C) 2010 American Institute of Physics. [doi:10.1063/1.3365064]
C1 [Haldar, Arabinda; Nayak, Ajaya K.; Suresh, K. G.] Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.
[Singh, Niraj K.; Mudryk, Ya.; Pecharsky, V. K.] Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
[Nigam, A. K.] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India.
[Pecharsky, V. K.] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
RP Haldar, A (reprint author), Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.
EM arabinda.haldar@gmail.com
NR 22
TC 2
Z9 2
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 1
PY 2010
VL 107
IS 9
AR 09E133
DI 10.1063/1.3365064
PG 3
WC Physics, Applied
SC Physics
GA 598KC
UT WOS:000277834300357
ER
PT J
AU Han, MG
Tang, W
Chen, WB
Zhou, H
Deng, LJ
AF Han, Mangui
Tang, Wei
Chen, Wenbing
Zhou, Hao
Deng, Longjiang
TI Effect of shape of Fe particles on their electromagnetic properties
within 1-18 GHz range
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article; Proceedings Paper
CT 11th Joint MMM-Intermag Conference
CY JAN 18-22, 2010
CL Washington, DC
ID ABSORPTION PROPERTIES; ABSORBING PROPERTIES; MICROWAVE ABSORBERS; CARBON
NANOTUBES; FERRITE; DISPERSION
AB Spherical magnetic iron particles were milled into different flake shapes, and their permittivity, permeability dispersion behaviors have been investigated within the frequency range of 1-8 GHz range. The results show that both permittivity and permeability values depend on the particle shapes. These flake particles also demonstrate better microwave absorption performances. (C) 2010 American Institute of Physics. [doi:10.1063/1.3367970]
C1 [Han, Mangui; Chen, Wenbing; Zhou, Hao; Deng, Longjiang] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China.
[Tang, Wei] Iowa State Univ, Ames Lab, USDOE, Ames, IA USA.
RP Han, MG (reprint author), Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China.
EM mangui@gmail.com
NR 16
TC 27
Z9 32
U1 5
U2 27
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 1
PY 2010
VL 107
IS 9
AR 09A958
DI 10.1063/1.3367970
PG 3
WC Physics, Applied
SC Physics
GA 598KC
UT WOS:000277834300163
ER
PT J
AU Huang, M
Mandru, AO
Petculescu, G
Clark, AE
Wun-Fogle, M
Lograsso, TA
AF Huang, M.
Mandru, A. O.
Petculescu, G.
Clark, A. E.
Wun-Fogle, M.
Lograsso, T. A.
TI Magnetostrictive and elastic properties of Fe100-xMox (2 < x < 12)
single crystals
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article; Proceedings Paper
CT 11th Joint MMM-Intermag Conference
CY JAN 18-22, 2010
CL Washington, DC
ID FE-GA ALLOYS; ANISOTROPY
AB In this paper we investigate the magnetostrictive [(3/2)lambda(100) and (3/2)lambda(111)] and elastic (c' and c(44)) behavior of single crystalline alloys Fe100-xMox for 2 grain boundary (GB). We find that the segregation is site selective at the GB-Fe will only segregate to specific sites. We further find that the choice of the segregation site is determined by the segregation-induced stress and effective crystal-field-induce splitting of Fe d orbital at that site. Our results suggest that the revealed mechanism of Fe segregation into the GB should be general for other 3d transition metals with partially filled 3d orbits and for other grain boundaries. (C) 2010 American Institute of Physics. [doi:10.1063/1.3369390]
C1 [Shi, T. T.; Li, Y. H.; Ma, Z. Q.; Qu, G. H.; Hong, F.; Xu, F.] Shanghai Univ, Dept Phys, SHU SolarE R&D Lab, Shanghai 200444, Peoples R China.
[Yan, Yanfa; Wei, Su-Huai] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Shi, TT (reprint author), Shanghai Univ, Dept Phys, SHU SolarE R&D Lab, Shanghai 200444, Peoples R China.
EM lyhua@shu.edu.cn
RI Xu, Fei/H-9305-2013; Xu, Fei/L-5113-2016
OI Xu, Fei/0000-0002-6779-5763
NR 22
TC 3
Z9 3
U1 5
U2 15
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 1
PY 2010
VL 107
IS 9
AR 093713
DI 10.1063/1.3369390
PG 3
WC Physics, Applied
SC Physics
GA 598KC
UT WOS:000277834300478
ER
PT J
AU Shim, JH
Kim, DH
Mesler, B
Moon, JH
Lee, KJ
Anderson, E
Fischer, P
AF Shim, Je-Ho
Kim, Dong-Hyun
Mesler, Brooke
Moon, Jung-Hwan
Lee, Kyung-Jin
Anderson, Erik
Fischer, Peter
TI Magnetic vortex dynamics on a picoseconds timescale in a hexagonal
Permalloy pattern
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article; Proceedings Paper
CT 11th Joint MMM-Intermag Conference
CY JAN 18-22, 2010
CL Washington, DC
AB We observed a motion of magnetic vortex core in a hexagonal Permalloy pattern by means of soft x-ray microscopy. Pump-probe stroboscopic observation on a picosecond timescale has been carried out after exciting a ground state vortex structure by an external field pulse of 1 ns duration. Vortex core is excited off from the center position of the hexagonal pattern but the analysis of the core trajectory reveals that the motion is nongyrotropic. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3358223]
C1 [Shim, Je-Ho; Kim, Dong-Hyun] Chungbuk Natl Univ, Dept Phys, Cheongju 361763, South Korea.
[Mesler, Brooke; Anderson, Erik; Fischer, Peter] Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Xray Opt, Berkeley, CA 94720 USA.
[Mesler, Brooke] UC Berkeley, Appl Sci & Technol Grad Grp, Berkeley, CA USA.
[Moon, Jung-Hwan; Lee, Kyung-Jin] Korea Univ, Dept Mat Sci & Engn, Seoul 136701, South Korea.
RP Shim, JH (reprint author), Chungbuk Natl Univ, Dept Phys, Cheongju 361763, South Korea.
EM donghyun@cbnu.ac.kr
RI Lee, Kyung-Jin/B-4431-2010; Kim, Dong-Hyun/F-7195-2012; MSD,
Nanomag/F-6438-2012; Fischer, Peter/A-3020-2010
OI Lee, Kyung-Jin/0000-0001-6269-2266; Fischer, Peter/0000-0002-9824-9343
NR 17
TC 1
Z9 1
U1 0
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 1
PY 2010
VL 107
IS 9
AR 09D302
DI 10.1063/1.3358223
PG 3
WC Physics, Applied
SC Physics
GA 598KC
UT WOS:000277834300267
ER
PT J
AU Singh, NK
Paudyal, D
Pecharsky, VK
Gschneidner, KA
AF Singh, Niraj K.
Paudyal, Durga
Pecharsky, V. K.
Gschneidner, K. A., Jr.
TI Magnetic and magnetothermodynamic properties of Ho5Si4
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article; Proceedings Paper
CT 11th Joint MMM-Intermag Conference
CY JAN 18-22, 2010
CL Washington, DC
ID INTERMETALLICS
AB The magnetic and magnetocaloric properties of Ho5Si4 have been investigated. The compound undergoes a second order ferromagnetic transition at 76 K (T-C) and a spin reorientation transition at about 15 K. The temperature dependencies of heat capacity data measured in various magnetic fields corroborate the second order ferromagnetic character of the transition at T-C. For a field change (Delta H) of 50 kOe, the maximum values of isothermal magnetic entropy change (Delta S-M) and adiabatic temperature change (Delta T-ad) are -14.8 J kg(-1) K-1 (114 mJ/cm(3) K) and 6.1 K, respectively. From the first principles calculations the T-C of Ho5Si4 is estimated to be 78 K and the maximum value of Delta S-M is estimated to be -12.6 J kg(-1) K-1 for Delta H= 50 kOe. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3365515]
C1 [Singh, Niraj K.; Paudyal, Durga; Pecharsky, V. K.; Gschneidner, K. A., Jr.] Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA.
[Pecharsky, V. K.; Gschneidner, K. A., Jr.] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
RP Singh, NK (reprint author), Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA.
EM niraj@ameslab.gov
NR 20
TC 4
Z9 4
U1 0
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 1
PY 2010
VL 107
IS 9
AR 09A921
DI 10.1063/1.3365515
PG 3
WC Physics, Applied
SC Physics
GA 598KC
UT WOS:000277834300126
ER
PT J
AU Sung, NH
Kreyssig, A
Kim, H
Tanatar, MA
Rhyee, JS
Kang, BY
Kim, MG
Kim, JY
Canfield, PC
Prozorov, R
Goldman, AI
Cho, BK
AF Sung, N. H.
Kreyssig, A.
Kim, H.
Tanatar, M. A.
Rhyee, J. S.
Kang, B. Y.
Kim, M. G.
Kim, J. Y.
Canfield, P. C.
Prozorov, R.
Goldman, A. I.
Cho, B. K.
TI Zero field magnetic phase transitions and anomalous low temperature
upturn in resistivity of single crystalline alpha-TmAlB4
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article; Proceedings Paper
CT 11th Joint MMM-Intermag Conference
CY JAN 18-22, 2010
CL Washington, DC
AB In this study, pure alpha-TmAlB4 (YCrB4 structure) single crystals were grown with no beta-TmAlB4 (ThMoB4 structure) intergrowth, and zero magnetic field transitions were confirmed through specific heat capacity, magnetization, and electric resistivity measurements. The anomalous magnetic transition was found at approximately 6.2 K with long range antiferromagnetic transition at 5.6 K. The difference in field dependence between these two transitions indicates that they do not share a common magnetic origin. In addition, we investigated electrical resistivity down to 20 mK, and found upturn behavior at around 0.8 K. The low temperature upturn anomaly in resistivity was not found for other compounds of investigation for RAlB4 (R=rare earth elements), which suggests that an alpha-RAlB4 system has a significantly different ground state, compared to a beta-RAlB4 system. (C) 2010 American Institute of Physics. [doi:10.1063/1.3367975]
C1 [Sung, N. H.; Kang, B. Y.; Kim, J. Y.; Cho, B. K.] GIST, Dept Mat Sci & Engn, Kwangju 500712, South Korea.
[Cho, B. K.] GIST, Dept Nanobio Mat & Elect, Kwangju 500712, South Korea.
[Kreyssig, A.; Kim, H.; Tanatar, M. A.; Kim, M. G.; Canfield, P. C.; Prozorov, R.; Goldman, A. I.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Kreyssig, A.; Kim, H.; Tanatar, M. A.; Kim, M. G.; Canfield, P. C.; Prozorov, R.; Goldman, A. I.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Rhyee, J. S.] Samsung Adv Inst Technol, Mat Res Lab, Yongin 446712, South Korea.
RP Cho, BK (reprint author), GIST, Dept Mat Sci & Engn, Kwangju 500712, South Korea.
EM chobk@gist.ac.kr
RI Kim, Min Gyu/B-8637-2012; Prozorov, Ruslan/A-2487-2008; Canfield,
Paul/H-2698-2014
OI Kim, Min Gyu/0000-0001-7676-454X; Prozorov, Ruslan/0000-0002-8088-6096;
NR 10
TC 1
Z9 1
U1 1
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 1
PY 2010
VL 107
IS 9
AR 09E148
DI 10.1063/1.3367975
PG 3
WC Physics, Applied
SC Physics
GA 598KC
UT WOS:000277834300372
ER
PT J
AU Tang, W
Wu, YQ
Oster, NT
Dennis, KW
Kramer, MJ
Anderson, IE
McCallum, RW
AF Tang, W.
Wu, Y. Q.
Oster, N. T.
Dennis, K. W.
Kramer, M. J.
Anderson, I. E.
McCallum, R. W.
TI Improved energy product in grained aligned and sintered MRE2Fe14B
magnets (MRE=Y plus Dy plus Nd)
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article; Proceedings Paper
CT 11th Joint MMM-Intermag Conference
CY JAN 18-22, 2010
CL Washington, DC
ID R2FE14B
AB Sintered [Nd-0.45(Y3Dy1)(0.25)*(0.55)](2.8)Fe14B magnets were prepared for the first time. Magnetic properties and microstructures of the magnets were investigated by magnetic measurements and electron microprobe analysis. The microstructure consists of a MRE2Fe14B (2-14-1) phase matrix having a grain size of similar to 10 mu m and a RE-rich grain boundary phase. However, sintering resulted in segregation of Y to the inner and Nd to the outside of the 2-14-1 grains. The magnet has a room temperature (BH)(max) of 25.4 MGOe, which is two times higher than that of the isotropic melt spun ribbons with similar compositions. The temperature coefficients of Br (alpha) and Hcj (beta) for the magnet are -0.150 and -0.632%/degrees C from 27 to 127 degrees C, respectively. These temperature coefficients, especially for beta, are also much higher than those of melt spun ribbons. The composition segregation in the 2-14-1 grains is believed to be responsible for the higher temperature coefficients. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3347786]
C1 [Tang, W.; Wu, Y. Q.; Oster, N. T.; Dennis, K. W.; Kramer, M. J.; Anderson, I. E.; McCallum, R. W.] Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
RP Tang, W (reprint author), Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
EM weitang@ameslab.gov
NR 8
TC 6
Z9 6
U1 0
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 1
PY 2010
VL 107
IS 9
AR 09A728
DI 10.1063/1.3347786
PG 3
WC Physics, Applied
SC Physics
GA 598KC
UT WOS:000277834300087
ER
PT J
AU Vandersall, KS
Tarver, CM
Garcia, F
Chidester, SK
AF Vandersall, Kevin S.
Tarver, Craig M.
Garcia, Frank
Chidester, Steven K.
TI On the low pressure shock initiation of
octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine based plastic bonded
explosives
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID IGNITION; PBX-9501; GAUGES
AB In large explosive and propellant charges, relatively low shock pressures on the order of 1-2 GPa impacting large volumes and lasting tens of microseconds can cause shock initiation of detonation. The pressure buildup process requires several centimeters of shock propagation before shock to detonation transition occurs. In this paper, experimentally measured run distances to detonation for lower input shock pressures are shown to be much longer than predicted by extrapolation of high shock pressure data. Run distance to detonation and embedded manganin gauge pressure histories are measured using large diameter charges of six octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) based plastic bonded explosives (PBX's) : PBX 9404; LX-04; LX-07; LX-10; PBX 9501; and EDC37. The embedded gauge records show that the lower shock pressures create fewer and less energetic "hot spot" reaction sites, which consume the surrounding explosive particles at reduced reaction rates and cause longer distances to detonation. The experimental data is analyzed using the ignition and growth reactive flow model of shock initiation in solid explosives. Using minimum values of the degrees of compression required to ignite hot spot reactions, the previously determined high shock pressure ignition and growth model parameters for the six explosives accurately simulate the much longer run distances to detonation and much slower growths of pressure behind the shock fronts measured during the shock initiation of HMX PBX's at several low shock pressures. (c) 2010 American Institute of Physics. [doi:10.1063/1.3407570]
C1 [Vandersall, Kevin S.; Tarver, Craig M.; Garcia, Frank; Chidester, Steven K.] Lawrence Livermore Natl Lab, Energet Mat Ctr, Livermore, CA 94551 USA.
RP Vandersall, KS (reprint author), Lawrence Livermore Natl Lab, Energet Mat Ctr, Livermore, CA 94551 USA.
EM tarver1@llnl.gov
NR 29
TC 12
Z9 12
U1 2
U2 19
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 1
PY 2010
VL 107
IS 9
AR 094906
DI 10.1063/1.3407570
PG 11
WC Physics, Applied
SC Physics
GA 598KC
UT WOS:000277834300548
ER
PT J
AU Wang, G
AF Wang, G.
TI Phonon emission in germanium and silicon by electrons and holes in
applied electric field at low temperature
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID DARK-MATTER; COSMOLOGICAL CONSTRAINTS; SCATTERING; DETECTOR; CRYSTAL;
SEMICONDUCTORS; SURFACES
AB The cryogenic dark matter search employs Ge and Si detectors to search for weakly interacting massive particle dark matter via its elastic-scattering interactions with nuclei while discriminating against interactions of background particles. These detectors distinguish nuclear recoils from electron recoils by simultaneously measuring phonon and ionization production in semiconducting substrates at sub-kelvin temperatures. They also reconstruct event position by quadrant-segmented measurement of the phonon signal. The ionization drift field does work on the electrons and holes. The charge carriers radiate this energy as acoustic phonons. At the typical applied field of 300 V/m in Ge (400 V/m in Si), we self-consistently model the behavior of the electrons and holes using independent drifted Maxwellian distributions, each characterized by an average drift velocity and an effective temperature, and including acoustic phonon emission. We calculate the phonon power angular and frequency distributions. We find that the bias polarity affects these distributions and, therefore, the phonon collection efficiency in Ge. (c) 2010 American Institute of Physics. [doi:10.1063/1.3354095]
C1 [Wang, G.] CALTECH, Dept Phys, Pasadena, CA 91125 USA.
RP Wang, G (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Lemont, IL 60439 USA.
EM gwang@anl.gov
NR 31
TC 8
Z9 8
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 1
PY 2010
VL 107
IS 9
AR 094504
DI 10.1063/1.3354095
PG 7
WC Physics, Applied
SC Physics
GA 598KC
UT WOS:000277834300536
ER
PT J
AU Wang, WX
Wang, YP
Zhang, XG
Wang, Y
Zou, J
Han, XF
AF Wang, W. X.
Wang, Y. P.
Zhang, X. -G.
Wang, Y.
Zou, Jin
Han, X. F.
TI Thickness dependence of magnetic and transport properties in
organic-CoFe discontinuous multilayers
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article; Proceedings Paper
CT 11th Joint MMM-Intermag Conference
CY JAN 18-22, 2010
CL Washington, DC
ID SPIN-VALVES; COULOMB GAP; MAGNETORESISTANCE; CONDUCTIVITY; TEMPERATURE;
MONOLAYERS
AB Spin-dependent transport measurement in 3-hexadecyl pyrrole (3HDP) with a CoFe layer and the current-in-plane geometry is reported. Transport properties indicate the CoFe layers are discontinuous when their thicknesses are smaller than 6 nm. The temperature dependence of the conductance suggests that the transport mechanism is likely small polaron hopping. The observed positive magnetoresistance ratio at low temperature gives evidence of spin-conserving transport. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3359438]
C1 [Wang, W. X.; Wang, Y. P.; Han, X. F.] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China.
[Zhang, X. -G.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci & Comp Sci, Oak Ridge, TN 37831 USA.
[Zhang, X. -G.] Oak Ridge Natl Lab, Div Math, Oak Ridge, TN 37831 USA.
[Wang, Y.; Zou, Jin] Univ Queensland, Mat Engn & Ctr Microscopy & Microanal, St Lucia, Qld 4072, Australia.
RP Han, XF (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China.
EM xfhan@aphy.iphy.ac.cn
RI Wang, Yong/A-7766-2010; Zou, Jin/B-3183-2009
OI Wang, Yong/0000-0002-9893-8296; Zou, Jin/0000-0001-9435-8043
NR 18
TC 3
Z9 3
U1 2
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 1
PY 2010
VL 107
IS 9
AR 09E307
DI 10.1063/1.3359438
PG 3
WC Physics, Applied
SC Physics
GA 598KC
UT WOS:000277834300387
ER
PT J
AU Xing, Q
Wu, D
Lograsso, TA
AF Xing, Q.
Wu, D.
Lograsso, T. A.
TI Magnetoelasticity of Fe-Si single crystals
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article; Proceedings Paper
CT 11th Joint MMM-Intermag Conference
CY JAN 18-22, 2010
CL Washington, DC
ID X-RAY-DIFFRACTION; ELASTIC-CONSTANTS; GA ALLOYS; IRON; MAGNETOSTRICTION;
TEMPERATURE; ANISOTROPY; STABILITY; BEHAVIOR
AB The tetragonal magnetostriction constant, (3/2)lambda(100), of Fe-Si single crystals was measured and was found to be structure dependent. Similar to that of Fe-Ge single crystals, (3/2)lambda(100) is positive in the single phase A2 regime, becomes negative in the single phase D0(3) regime, and changes from positive to negative between the two regimes. Short-range order in the A2 regime decreases the magnetostriction prior to the onset of long range order. In the single phase regions of both A2 and D0(3), thermal history does not show any obvious effect on the magnetostriction, contrary to that found for Fe-Ga alloys. However, in the regions of phase mixture involving A2, B2, and D0(3) phases, quenching pushes the change in magnetostriction from positive to negative to higher Si contents. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3353017]
C1 [Xing, Q.; Wu, D.; Lograsso, T. A.] Ames Lab, Div Mat Sci & Engn, Ames, IA 50011 USA.
RP Xing, Q (reprint author), Ames Lab, Div Mat Sci & Engn, Ames, IA 50011 USA.
EM qxing@ameslab.gov
NR 23
TC 6
Z9 6
U1 0
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 1
PY 2010
VL 107
IS 9
AR 09A911
DI 10.1063/1.3353017
PG 3
WC Physics, Applied
SC Physics
GA 598KC
UT WOS:000277834300116
ER
PT J
AU Soucy, KG
Lim, HK
Attarzadeh, DO
Santhanam, L
Kim, JH
Bhunia, AK
Sevinc, B
Ryoo, S
Vazquez, ME
Nyhan, D
Shoukas, AA
Berkowitz, DE
AF Soucy, Kevin G.
Lim, Hyun Kyo
Attarzadeh, David O.
Santhanam, Lakshmi
Kim, Jae Hyung
Bhunia, Anil K.
Sevinc, Baris
Ryoo, Sungwoo
Vazquez, Marcelo E.
Nyhan, Daniel
Shoukas, Artin A.
Berkowitz, Dan E.
TI Dietary inhibition of xanthine oxidase attenuates radiation-induced
endothelial dysfunction in rat aorta
SO JOURNAL OF APPLIED PHYSIOLOGY
LA English
DT Article
DE gamma radiation; oxypurinol; nitric oxide; oxidative stress;
nitroso-redox imbalance
ID PULSE-WAVE VELOCITY; CHRONIC OXIDATIVE STRESS; NORMAL TISSUE-INJURY;
NITRIC-OXIDE; IONIZING-RADIATION; OXIDOREDUCTASE SYSTEM;
MOLECULAR-MECHANISMS; GAMMA-IRRADIATION; BOMB SURVIVORS; HEART-DISEASE
AB Soucy KG, Lim HK, Attarzadeh DO, Santhanam L, Kim JH, Bhunia AK, Sevinc B, Ryoo S, Vazquez ME, Nyhan D, Shoukas AA, Berkowitz DE. Dietary inhibition of xanthine oxidase attenuates radiation-induced endothelial dysfunction in rat aorta. J Appl Physiol 108: 1250-1258, 2010. First published February 18, 2010; doi:10.1152/japplphysiol.00946.2009.-Radiation exposure is associated with the development of various cardiovascular diseases. Although irradiation is known to cause elevated oxidant stress and chronic inflammation, both of which are detrimental to vascular function, the molecular mechanisms remain incompletely understood. We previously demonstrated that radiation causes endothelial dysfunction and increased vascular stiffness by xanthine oxidase (XO) activation. In this study, we investigated whether dietary inhibition of XO protects against radiation-induced vascular injury. We exposed 4-mo-old rats to a single dose of 0 or 5 Gy gamma radiation. These rats received normal drinking water or water containing 1 mM oxypurinol, an XO inhibitor. We measured XO activity and superoxide production in rat aorta and demonstrated that both were significantly elevated 2 wk after radiation exposure. However, oxypurinol treatment in irradiated rats prevented aortic XO activation and superoxide elevation. We next investigated endothelial function through fluorescent measurement of nitric oxide (NO) and vascular tension dose responses. Radiation reduced endothelium-dependent NO production in rat aorta. Similarly, endothelium-dependent vasorelaxation in the aorta of irradiated rats was significantly attenuated compared with the control group. Dietary XO inhibition maintained NO production at control levels and prevented the development of endothelial dysfunction. Furthermore, pulse wave velocity, a measure of vascular stiffness, increased by 1 day postirradiation and remained elevated 2 wk after irradiation, despite unchanged blood pressures. In oxypurinol- treated rats, pulse wave velocities remained unchanged from baseline throughout the experiment, signifying preserved vascular health. These findings demonstrate that XO inhibition can offer protection from radiation-induced endothelial dysfunction and cardiovascular complications.
C1 [Santhanam, Lakshmi; Kim, Jae Hyung; Bhunia, Anil K.; Nyhan, Daniel; Berkowitz, Dan E.] Johns Hopkins Med Inst, Dept Anesthesiol Crit Care Med, Baltimore, MD 21287 USA.
[Soucy, Kevin G.; Attarzadeh, David O.; Sevinc, Baris; Shoukas, Artin A.; Berkowitz, Dan E.] Johns Hopkins Med Inst, Dept Biomed Engn, Baltimore, MD 21287 USA.
[Lim, Hyun Kyo] Yonsei Univ, Dept Anesthesiol & Pain Med, Wonju, South Korea.
[Ryoo, Sungwoo] Kangwon Natl Univ, Div Life Sci, Chunchon, South Korea.
[Vazquez, Marcelo E.] Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA.
RP Berkowitz, DE (reprint author), Johns Hopkins Med Inst, Dept Anesthesiol Crit Care Med, 600 N Wolfe St,Tower 711, Baltimore, MD 21287 USA.
EM dberkowi@jhmi.edu
FU National Aeronautics and Space Administration [NNJ05HF03G]; National
Space Biomedical Research Institute [NCC 9-58-CA01301]
FX This research is supported largely in part by National Aeronautics and
Space Administration Grant NNJ05HF03G and National Space Biomedical
Research Institute Grant NCC 9-58-CA01301.
NR 55
TC 12
Z9 12
U1 0
U2 7
PU AMER PHYSIOLOGICAL SOC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA
SN 8750-7587
J9 J APPL PHYSIOL
JI J. Appl. Physiol.
PD MAY
PY 2010
VL 108
IS 5
BP 1250
EP 1258
DI 10.1152/japplphysiol.00946.2009
PG 9
WC Physiology; Sport Sciences
SC Physiology; Sport Sciences
GA 591LB
UT WOS:000277301000031
PM 20167676
ER
PT J
AU Han, H
Sullivan, DP
Fisk, WJ
AF Han, Hwataik
Sullivan, Douglas P.
Fisk, William J.
TI Airflow Simulations around OA Intake Louver with Electronic Velocity
Sensors
SO JOURNAL OF ASIAN ARCHITECTURE AND BUILDING ENGINEERING
LA English
DT Article
DE ventilation; outdoor air louver; computational fluid dynamics; velocity
sensor installation
ID HVAC SYSTEMS; OUTDOOR AIR; TECHNOLOGIES; RATES
AB It is important to control outdoor airflow rates into HVAC systems in terms of energy conservation and healthy indoor environment. Technologies are being developed to measure outdoor air (OA) flow rates through OA intake louvers on a real time basis. The purpose of this paper is to investigate the airflow characteristics through an OA intake louver numerically in order to provide suggestions for sensor installations. Airflow patterns are simulated with and without electronic air velocity sensors within cylindrical probes installed between louver blades or at the downstream face of the louver. Numerical results show quite good agreements with experimental data, and provide insights regarding measurement system design. The simulations indicate that velocity profiles are more spatially uniform at the louver outlet relative to between louver blades, that pressure drops imposed by the sensor bars are smaller with sensor bars at the louver outlet, and that placement of the sensor bars between louver blades substantially increases air velocities inside the louver. These findings suggest there is an advantage to placing the sensor bars at the louver outlet face.
C1 [Han, Hwataik] Kookmin Univ, Seoul 136702, South Korea.
[Sullivan, Douglas P.; Fisk, William J.] Lawrence Berkeley Natl Lab, Indoor Environm Dept, Berkeley, CA USA.
RP Han, H (reprint author), Kookmin Univ, 861-1 Jeungneung Dong, Seoul 136702, South Korea.
EM hhan@kookmin.ac.kr
FU Korean Government [09-0260]; California Energy Commission through the
San Diego State University Research Foundation [54915A/06-03B];
University of California [DE-AC02-05CH11231]; U.S. Department of Energy
[DE-AC02-05CH11231]
FX This work was supported by Kookmin University and National Research
Foundation of Korea Grant funded by the Korean Government (09-0260). The
experiments were supported by the California Energy Commission through
the San Diego State University Research Foundation under contract
54915A/06-03B through Contract No. DE-AC02-05CH11231 between the
University of California and the U.S. Department of Energy.
NR 10
TC 0
Z9 0
U1 0
U2 1
PU ARCHITECTURAL INST JAPAN
PI TOKYO
PA 5-26-20 SHIBA, MINATO-KU, TOKYO, 108-8414, JAPAN
SN 1346-7581
EI 1347-2852
J9 J ASIAN ARCHIT BUILD
JI J. Asian Archit. Build. Eng.
PD MAY
PY 2010
VL 9
IS 1
BP 237
EP 242
PG 6
WC Architecture; Construction & Building Technology
SC Architecture; Construction & Building Technology
GA 738IX
UT WOS:000288634600032
ER
PT J
AU Vandehey, NT
Moirano, JM
Converse, AK
Holden, JE
Mukherjee, J
Murali, D
Nickles, RJ
Davidson, RJ
Schneider, ML
Christian, BT
AF Vandehey, Nicholas T.
Moirano, Jeffrey M.
Converse, Alexander K.
Holden, James E.
Mukherjee, Jogesh
Murali, Dhanabalan
Nickles, R. Jerry
Davidson, Richard J.
Schneider, Mary L.
Christian, Bradley T.
TI High-affinity dopamine D-2/D-3 PET radioligands F-18-fallypride and
C-11-FLB457: A comparison of kinetics in extrastriatal regions using a
multiple-injection protocol
SO JOURNAL OF CEREBRAL BLOOD FLOW AND METABOLISM
LA English
DT Article
DE D-2/D-3; dopamine; fallypride; FLB457; multiple injection; PET
ID POSITRON-EMISSION-TOMOGRAPHY; D2 RECEPTOR DENSITY; HUMAN BRAIN;
NONHUMAN-PRIMATES; BINDING; LIGAND; QUANTIFICATION; PARAMETERS; MODEL;
IDENTIFICATION
AB F-18-Fallypride and C-11-FLB457 are commonly used PET radioligands for imaging extrastriatal dopamine D-2/D-3 receptors, but differences in their in vivo kinetics may affect the sensitivity for measuring subtle changes in receptor binding. Focusing on regions of low binding, a direct comparison of the kinetics of F-18-fallypride and C-11-FLB457 was made using a MI protocol. Injection protocols were designed to estimate K-1, k(2), f(ND)k(on), B-max, and k(off) in the midbrain and cortical regions of the rhesus monkey. 11C-FLB457 cleared from the arterial plasma faster and yielded a ND space distribution volume (K-1/k(2)) that is three times higher than 18F-fallypride, primarily due to a slower k(2) (FAL: FLB; k(2) = 0.54 min(-1): 0.18 min(-1)). The dissociation rate constant, koff, was slower for C-11-FLB457, resulting in a lower K-Dapp than F-18-fallypride (FAL: FLB; 0.39 nM: 0.13 nM). Specific D-2/D-3 binding could be detected in the cerebellum for C-11-FLB457 but not F-18-fallypride. Both radioligands can be used to image extrastriatal D-2/D-3 receptors, with C-11-FLB457 providing greater sensitivity to subtle changes in low-receptor-density cortical regions and F-18-fallypride being more sensitive to endogenous dopamine displacement in medium-to-high-receptor-density regions. In the presence of specific D-2/D-3 binding in the cerebellum, reference region analysis methods will give a greater bias in BPND with C-11-FLB457 than with F-18-fallypride. Journal of Cerebral Blood Flow & Metabolism (2010) 30, 994-1007; doi: 10.1038/jcbfm.2009.270; published online 30 December 2009
C1 [Vandehey, Nicholas T.; Moirano, Jeffrey M.; Holden, James E.; Nickles, R. Jerry; Christian, Bradley T.] Univ Wisconsin, Dept Med Phys, Madison, WI 53706 USA.
[Converse, Alexander K.; Murali, Dhanabalan; Davidson, Richard J.; Christian, Bradley T.] Univ Wisconsin, Waisman Lab Brain Imaging & Behav, Madison, WI USA.
[Mukherjee, Jogesh] Univ Calif Irvine, Brain Imaging Ctr, Irvine, CA USA.
[Schneider, Mary L.] Univ Wisconsin, Dept Psychol, Madison, WI 53706 USA.
RP Vandehey, NT (reprint author), Univ Wisconsin Madison, Lawrence Berkeley Natl Lab, Dept Med Phys, 1 Cyclotron Rd,MS55R0121, Berkeley, CA 94720 USA.
EM nickvandehey@gmail.com
RI Mukherjee, Jogeshwar/O-1320-2013;
OI Mukherjee, Jogeshwar/0000-0003-1009-877X; Vandehey,
Nicholas/0000-0003-0286-7532
FU NCI [T32 CA009206-30]; NIH [T90 DK070079]; NIH/NIBIB [EB006110]; NIAAA
[RO1 AA12277]
FX We acknowledge the help provided by Dr Todd Barnhart and Jon Engle in
radiotracer preparation; Liz Ahlers in data acquisition; and Leslie
Resch, Allison Theide, and Julie Larson in animal handling. This work
was supported by funding through NCI T32 CA009206-30, NIH T90 DK070079,
NIH/NIBIB EB006110, and NIAAA RO1 AA12277.
NR 39
TC 31
Z9 31
U1 0
U2 5
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 0271-678X
J9 J CEREBR BLOOD F MET
JI J. Cereb. Blood Flow Metab.
PD MAY
PY 2010
VL 30
IS 5
BP 994
EP 1007
DI 10.1038/jcbfm.2009.270
PG 14
WC Endocrinology & Metabolism; Hematology; Neurosciences
SC Endocrinology & Metabolism; Hematology; Neurosciences & Neurology
GA 590TM
UT WOS:000277250900012
PM 20040928
ER
PT J
AU Chialvo, AA
Gruszkiewicz, MS
Cole, DR
AF Chialvo, Ariel A.
Gruszkiewicz, Miroslaw S.
Cole, David R.
TI Ion-Pair Association in Ultrasupercritical Aqueous Environments:
Successful Interplay among Conductance Experiments, Theory, and
Molecular Simulations
SO JOURNAL OF CHEMICAL AND ENGINEERING DATA
LA English
DT Article
ID SODIUM-CHLORIDE SOLUTIONS; HIGH-TEMPERATURE; ELECTROLYTE-SOLUTIONS;
SUPERCRITICAL WATER; ELEVATED-TEMPERATURES; FREE-ENERGY; CONDUCTIVITY
MEASUREMENTS; SYSTEM NACL-H2O; 1.4 MPA; 458 K
AB We discuss the interplay among theory, molecular simulations, and electric conductance experiments as an important tool for the extraction of ion-pair interaction potentials to make possible the bridging of the density gap between the lowest experimentally attainable conductance measurement and the theoretically acceptable zero-density limit of the ion-pair association constant. The density dependence of the Na(+)center dot center dot center dot Cl(-) pair association constant in ultrasupercritical (USC) steam environments is predicted by a constraint molecular dynamics simulation over state conditions relevant to the new generation of USC steam power plants. Finally, we draw attention to relevant modeling challenges associated with the behavior of these systems around the zero-density limit, discuss ways to overcome the drawbacks of traditional log K(a)-log rho models, and illustrate the case with an explicit quartic (rho)(1/2)-polynomial representation for log K(a).
C1 [Chialvo, Ariel A.; Gruszkiewicz, Miroslaw S.; Cole, David R.] Oak Ridge Natl Lab, Div Chem Sci, Geochem & Interfacial Sci Grp, Oak Ridge, TN 37831 USA.
RP Chialvo, AA (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Geochem & Interfacial Sci Grp, Oak Ridge, TN 37831 USA.
EM chialvoaa@ornl.gov
RI Gruszkiewicz, Miroslaw/L-2389-2016;
OI Gruszkiewicz, Miroslaw/0000-0002-6551-6724; Chialvo,
Ariel/0000-0002-6091-4563
FU Division of Chemical Sciences, Geosciences, and Biosciences. Office of
Basic Energy Sciences with Oak Ridge National Laboratory
[DE-AC05-00OR22725]; Electric Power Research Institute (EPRI)
FX This research was sponsored by the Division of Chemical Sciences,
Geosciences, and Biosciences. Office of Basic Energy Sciences under
Contract No. DE-AC05-00OR22725 with Oak Ridge National Laboratory,
managed and operated by UT-Battelle, LLC. Partial support from the
Electric Power Research Institute (EPRI) is gratefully acknowledged.
NR 72
TC 13
Z9 13
U1 0
U2 13
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0021-9568
J9 J CHEM ENG DATA
JI J. Chem. Eng. Data
PD MAY
PY 2010
VL 55
IS 5
BP 1828
EP 1836
DI 10.1021/je900788r
PG 9
WC Thermodynamics; Chemistry, Multidisciplinary; Engineering, Chemical
SC Thermodynamics; Chemistry; Engineering
GA 593YQ
UT WOS:000277499600014
ER
PT J
AU Hammons, C
Wang, XP
Nesterov, V
Richmond, MG
AF Hammons, Casey
Wang, Xiaoping
Nesterov, Vladimir
Richmond, Michael G.
TI Diphosphine- and CO-Induced Fragmentation of Chloride-bridged Dinuclear
Complex and Cp*Ir(mu-Cl)(3)Re(CO)(3) and Attempted Synthesis of
Cp*Ir(mu-Cl)(3)Mn(CO)(3): Spectroscopic Data and X-ray Diffraction
Structures of the Pentamethylcyclopentadienyl Compounds
[Cp*IrCl{(Z)-Ph2PCH = CHPPh2}][Cl]center dot 2CHCl(3) and Cp*Ir(CO)Cl-2
SO JOURNAL OF CHEMICAL CRYSTALLOGRAPHY
LA English
DT Article
DE Iridium-rhenium compounds; Halide-bridged compounds; Mixed-metal
compounds; Ligand substitution; X-ray crystallography
ID OPPENAUER-TYPE OXIDATION; HETEROBIMETALLIC COMPLEXES; BIMETALLIC
COMPLEXES; CIS-CARBONYL; CATALYSIS; LIGANDS; IRIDIUM; IR; SUBSTITUTION;
ALCOHOLS
AB The confacial bioctahedral compound Cp*Ir(mu-Cl)(3)Re(CO)(3) (1) undergoes rapid fragmentation in the presence of the unsaturated diphosphine ligand (Z)-Ph2PCH = CHPPh2 to give the mononuclear compounds [Cp*IrCl {(Z)-Ph2PCH = CHPPh2}][Cl] (2) and fac-ClRe(CO)(3)[(Z)-Ph2PCH = CHPPh2] (3). 2 has been characterized by H-1 and P-31 NMR spectroscopy and X-ray diffraction analysis. 2 center dot 2CHCl(3) crystallizes in the monoclinic space group C2/c, a = 35.023 (8) angstrom, b = 10.189 (2) angstrom, c = 24.003 (6) angstrom, b = 103.340 (3), V = 8,335 (3) angstrom 3, Z = 8, and d(calc) = 1.647 Mg/m(3); R = 0.0383, R-w = 0.1135 for 8,178 reflections with I> 2 sigma(I). The Ir(III) center in 2 exhibits a six-coordinate geometry and displays a chelating diphosphine group. Compound 1 reacts with added CO with fragmentation to yield the known compounds Cp*Ir(CO)Cl-2 (4) and ClRe(CO)(5) (5) in near quantitative yield by IR spectroscopy. Using the protocol established by our groups for the synthesis of 1, we have explored the reaction of [Cp*IrCl2](2) with ClMn(CO)(5) as a potential route to Cp*Ir(mu-Cl)(3)Mn(CO)(3); unfortunately, 4 was the only product isolated from this reaction. The solid-state structure of 4 was determined by X-ray diffraction analysis. 4 crystallizes in the triclinic space group P-1, a = 7.4059 (4) angstrom, b = 7.8940 (4) angstrom, c = 11.8488 (7) angstrom, alpha = 80.020 (1), beta = 79.758 (1), gamma = 68.631 (1), V = 630.34 (6) angstrom(3), Z = 2, and d(calc) = 2.246 Mg/m(3); R = 0.0126, R-w = 0.0329 for 2,754 reflections with I> 2 sigma(I). The expected three-legged piano-stool geometry in 4 has been crystallographically confirmed.
C1 [Hammons, Casey; Nesterov, Vladimir; Richmond, Michael G.] Univ N Texas, Dept Chem, Denton, TX 76203 USA.
[Wang, Xiaoping] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
RP Nesterov, V (reprint author), Univ N Texas, Dept Chem, Denton, TX 76203 USA.
EM wangx@ornl.gov; vladimir.nesterov@unt.edu; cobalt@unt.edu
RI Wang, Xiaoping/E-8050-2012; G, Neela/H-3016-2014
OI Wang, Xiaoping/0000-0001-7143-8112;
FU Robert A. Welch Foundation [B-1093-MGR]; U.S. Department of Energy,
Office of Science [DE-AC05-00OR22725]
FX Financial support from the Robert A. Welch Foundation (Grant B-1093-MGR)
is much appreciated, and X. Wang acknowledges the support by the U.S.
Department of Energy, Office of Science, under Contract No.
DE-AC05-00OR22725 managed by UT Battelle, LLC.
NR 41
TC 2
Z9 2
U1 0
U2 3
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1074-1542
J9 J CHEM CRYSTALLOGR
JI J. Chem. Crystallogr.
PD MAY
PY 2010
VL 40
IS 5
BP 453
EP 460
DI 10.1007/s10870-009-9677-y
PG 8
WC Crystallography; Spectroscopy
SC Crystallography; Spectroscopy
GA 578AA
UT WOS:000276264400011
ER
PT J
AU Alam, TM
Alam, MK
AF Alam, Todd M.
Alam, M. Kathleen
TI Development of variance-filtered instrumental transfer methods for
high-resolution NMR spectroscopy
SO JOURNAL OF CHEMOMETRICS
LA English
DT Article
DE instrumental transfer; NMR spectroscopy; direct standardization (DS);
piece-wise direct standardization (PDS); variance-filter
ID STANDARDIZATION; CALIBRATION; METABONOMICS; BIOFLUIDS; SPECTRA
AB The introduction of a variance-filter to both direct standardization (DS) and piece-wise direct standardization (PDS) instrumental transfer methods for the analysis of NMR spectral data is described. The variance-filter modification allows for the identification of regions in the NMR spectra that are not adequately represented by the limited number of transfer calibration samples used during the calculation of the instrument-to-instrument transfer matrix. For these spectral frequencies, the corresponding portion of the transfer matrix is replaced by identity (or scaled identity) prior to the secondary instrumental data sets being transferred to the target instrument response. The spectral matching performance of the variance-filtered instrumental transfer method as applied to high-resolution (1)H NMR spectra is presented along with possible uses and limitations. Copyright (C) 2010 John Wiley & Sons, Ltd.
C1 [Alam, Todd M.] Sandia Natl Labs, Dept Nanostruct & Elect Mat, Albuquerque, NM 87185 USA.
[Alam, M. Kathleen] Sandia Natl Labs, Dept Energet Characterizat, Albuquerque, NM 87185 USA.
RP Alam, TM (reprint author), Sandia Natl Labs, Dept Nanostruct & Elect Mat, MS 0886, Albuquerque, NM 87185 USA.
EM tmalam@sandia.gov
FU United States Department of Energy's NNSA [DE-AC04-94AL85000]; Sandia
LDRD program
FX Sandia is a multiprogram laboratory operated by Sandia Corporation, a
Lockheed Martin Company, for the United States Department of Energy's
NNSA under contract DE-AC04-94AL85000. This work was funded entirely by
the Sandia LDRD program. The author thank David Volk (UTMB) for the
initial acquisition of the data set from the Varian instrument.
NR 16
TC 3
Z9 3
U1 0
U2 3
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0886-9383
J9 J CHEMOMETR
JI J. Chemometr.
PD MAY-JUN
PY 2010
VL 24
IS 5-6
BP 261
EP 272
DI 10.1002/cem.1287
PG 12
WC Automation & Control Systems; Chemistry, Analytical; Computer Science,
Artificial Intelligence; Instruments & Instrumentation; Mathematics,
Interdisciplinary Applications; Statistics & Probability
SC Automation & Control Systems; Chemistry; Computer Science; Instruments &
Instrumentation; Mathematics
GA 627CY
UT WOS:000280017700004
ER
PT J
AU Schwartz, SE
Charlson, RJ
Kahn, RA
Ogren, JA
Rodhe, H
AF Schwartz, Stephen E.
Charlson, Robert J.
Kahn, Ralph A.
Ogren, John A.
Rodhe, Henning
TI Why Hasn't Earth Warmed as Much as Expected?
SO JOURNAL OF CLIMATE
LA English
DT Article
ID OCEAN HEAT-CONTENT; SEA-LEVEL RISE; CLIMATE SENSITIVITY; ANTHROPOGENIC
AEROSOLS; OPTICAL-PROPERTIES; ENERGY; SIMULATIONS; IMBALANCE; EMISSIONS;
MODELS
AB The observed increase in global mean surface temperature (GMST) over the industrial era is less than 40% of that expected from observed increases in long-lived greenhouse gases together with the best-estimate equilibrium climate sensitivity given by the 2007 Assessment Report of the Intergovernmental Panel on Climate Change (IPCC). Possible reasons for this warming discrepancy are systematically examined here. The warming discrepancy is found to be due mainly to some combination of two factors: the IPCC best estimate of climate sensitivity being too high and/or the greenhouse gas forcing being partially offset by forcing by increased concentrations of atmospheric aerosols; the increase in global heat content due to thermal disequilibrium accounts for less than 25% of the discrepancy, and cooling by natural temperature variation can account for only about 15%. Current uncertainty in climate sensitivity is shown to preclude determining the amount of future fossil fuel CO2 emissions that would be compatible with any chosen maximum allowable increase in GMST; even the sign of such allowable future emissions is unconstrained. Resolving this situation, by empirical determination of the earth's climate sensitivity from the historical record over the industrial period or through use of climate models whose accuracy is evaluated by their performance over this period, is shown to require substantial reduction in the uncertainty of aerosol forcing over this period.
C1 [Schwartz, Stephen E.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Charlson, Robert J.] Univ Washington, Seattle, WA 98195 USA.
[Kahn, Ralph A.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Ogren, John A.] NOAA, Earth Syst Res Lab, Boulder, CO USA.
[Rodhe, Henning] Stockholm Univ, Dept Meteorol, S-10691 Stockholm, Sweden.
RP Schwartz, SE (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM ses@bnl.gov
RI Schwartz, Stephen/C-2729-2008; Kahn, Ralph/D-5371-2012; Ogren,
John/M-8255-2015
OI Schwartz, Stephen/0000-0001-6288-310X; Kahn, Ralph/0000-0002-5234-6359;
Ogren, John/0000-0002-7895-9583
FU U.S. Department of Energy (Office of Science, OBER) [DE-AC02-98CH10886];
NASA's CALIPSO Mission [NAS1-99105]; NSF [ATM-0601177]
FX Work by SES was supported by the U.S. Department of Energy (Office of
Science, OBER) under Contract DE-AC02-98CH10886. Work by RJC was
supported in part by NASA's CALIPSO Mission (Contract NAS1-99105) and
NSF Grant ATM-0601177.
NR 56
TC 41
Z9 42
U1 2
U2 33
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0894-8755
EI 1520-0442
J9 J CLIMATE
JI J. Clim.
PD MAY
PY 2010
VL 23
IS 10
BP 2453
EP 2464
DI 10.1175/2009JCLI3461.1
PG 12
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 611AK
UT WOS:000278782600001
ER
PT J
AU Khoruts, A
Dicksved, J
Jansson, JK
Sadowsky, MJ
AF Khoruts, Alexander
Dicksved, Johan
Jansson, Janet K.
Sadowsky, Michael J.
TI Changes in the Composition of the Human Fecal Microbiome After
Bacteriotherapy for Recurrent Clostridium difficile-associated Diarrhea
SO JOURNAL OF CLINICAL GASTROENTEROLOGY
LA English
DT Article
DE clostridium difficile; bacteriotherapy; T-RFLP; 16S rRNA
ID INFLAMMATORY-BOWEL-DISEASE; 16S RIBOSOMAL-RNA; GUT MICROBIOTA;
DIVERSITY; COLITIS; POPULATIONS; BUTYRATE; STRAINS; GENES; FECES
AB Clostridium difficile-associated disease (CDAD) is the major known cause of antibiotic-induced diarrhea and colitis, and the disease is thought to result from persistent disruption of commensal gut microbiota. Bacteriotherapy by way of fecal transplantation can be used to treat recurrent CDAD, which is thought to reestablish the normal colonic microflora. However, limitations of conventional microbiologic techniques have, until recently, precluded testing of this idea. In this study, we used terminal-restriction fragment length polymorphism and 16S rRNA gene sequencing approaches to characterize the bacterial composition of the colonic microflora in a patient suffering from recurrent CDAD before and after treatment by fecal transplantation from a healthy donor. Although the patient's residual colonic microbiota, prior to therapy was deficient in members of the bacterial divisions-Firmicutes and Bacteriodetes, transplantation had a dramatic impact on the composition of the patient's gut microbiota. By 14 days posttransplantation, the fecal bacterial composition of the recipient was highly similar to that of the donor and was dominated by Bacteroides spp. strains and an uncharacterized butyrate producing bacterium. The change in bacterial composition was accompanied by resolution of the patient's symptoms. The striking similarity of the recipient's and donor's intestinal microbiota following after bacteriotherapy suggests that the donor's bacteria quickly occupied their requisite niches resulting in restoration of both the structure and function of the microbial communities present.
C1 [Dicksved, Johan; Sadowsky, Michael J.] Univ Minnesota, Dept Soil Water & Climate, Inst Biotechnol, St Paul, MN 55108 USA.
[Dicksved, Johan] Univ Minnesota, Microbial & Plant Genom Inst, St Paul, MN 55108 USA.
[Khoruts, Alexander] Univ Minnesota, Dept Med, Minneapolis, MN 55455 USA.
[Khoruts, Alexander] Univ Minnesota, Ctr Immunol, Minneapolis, MN 55455 USA.
[Jansson, Janet K.] Swedish Univ Agr Sci, Dept Microbiol, S-75007 Uppsala, Sweden.
[Sadowsky, Michael J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Sadowsky, MJ (reprint author), Univ Minnesota, Dept Soil Water & Climate, Inst Biotechnol, 1991 Upper Buford Circle,439 Borlaug Hall, St Paul, MN 55108 USA.
EM Sadowsky@umn.edu
RI Sadowsky, Michael/J-2507-2016;
OI Sadowsky, Michael/0000-0001-8779-2781; Dicksved,
Johan/0000-0002-7515-4480
FU US Department of Energy with Lawrence Berkeley National Laboratory
[DE-AC02-05CH11231]; University of Minnesota Agricultural Experiment
Station
FX Supported, in part, by US Department of Energy Contract
DE-AC02-05CH11231 with Lawrence Berkeley National Laboratory to JKK and
by funding from the University of Minnesota Agricultural Experiment
Station to MJS.
NR 36
TC 283
Z9 296
U1 11
U2 98
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0192-0790
J9 J CLIN GASTROENTEROL
JI J. Clin. Gastroenterol.
PD MAY-JUN
PY 2010
VL 44
IS 5
BP 354
EP 360
DI 10.1097/MCG.0b013e3181c87e02
PG 7
WC Gastroenterology & Hepatology
SC Gastroenterology & Hepatology
GA 588VK
UT WOS:000277102300010
PM 20048681
ER
PT J
AU Ringler, TD
Thuburn, J
Klemp, JB
Skamarock, WC
AF Ringler, T. D.
Thuburn, J.
Klemp, J. B.
Skamarock, W. C.
TI A unified approach to energy conservation and potential vorticity
dynamics for arbitrarily-structured C-grids
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE C-grid; Voronoi diagram; Potential vorticity; Shallow-water equations
ID SHALLOW-WATER EQUATIONS; MODEL; SPHERE; ALGORITHMS; SCHEMES; OCEAN;
CORES
AB A numerical scheme applicable to arbitrarily-structured C-grids is presented for the nonlinear shallow-water equations. By discretizing the vector-invariant form of the momentum equation, the relationship between the nonlinear Coriolis force and the potential vorticity flux can be used to guarantee that mass, velocity and potential vorticity evolve in a consistent and compatible manner. Underpinning the consistency and compatibility of the discrete system is the construction of an auxiliary thickness equation that is staggered from the primary thickness equation and collocated with the vorticity field. The numerical scheme also exhibits conservation of total energy to within time-truncation error. Simulations of the standard shallow-water test cases confirm the analysis and show convergence rates between 1st- and 2nd-order accuracy when discretizing the system with quasi-uniform spherical Voronoi diagrams. The numerical method is applicable to a wide class of meshes, including latitude-longitude grids, Voronoi diagrams, Delaunay triangulations and conformally-mapped cubed-sphere meshes. Published by Elsevier Inc.
C1 [Ringler, T. D.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Thuburn, J.] Univ Exeter, Math Res Inst, Sch Engn Comp & Math, Exeter EX4 4QF, Devon, England.
[Klemp, J. B.; Skamarock, W. C.] Natl Ctr Atmospher Res, Boulder, CO 80307 USA.
RP Ringler, TD (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM ringler@lanl.gov; j.thuburn@ex.ac.uk; klemp@ucar.edu; skamaroc@ucar.edu
NR 37
TC 80
Z9 80
U1 0
U2 5
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9991
J9 J COMPUT PHYS
JI J. Comput. Phys.
PD MAY 1
PY 2010
VL 229
IS 9
BP 3065
EP 3090
DI 10.1016/j.jcp.2009.12.007
PG 26
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 576DM
UT WOS:000276124400001
ER
PT J
AU Donev, A
Bulatov, VV
Oppelstrup, T
Gilmer, GH
Sadigh, B
Kalos, MH
AF Donev, Aleksandar
Bulatov, Vasily V.
Oppelstrup, Tomas
Gilmer, George H.
Sadigh, Babak
Kalos, Malvin H.
TI A First-Passage Kinetic Monte Carlo algorithm for complex
diffusion-reaction systems
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE Kinetic Monte Carlo; First-passage; Diffusion-reaction; Asynchronous
algorithms
ID MOLECULAR-DYNAMICS SIMULATION; NONSPHERICAL HARD PARTICLES; STOCHASTIC
SIMULATION; IRRADIATION; MODELS; SCALE
AB We develop an asynchronous event-driven First-Passage Kinetic Monte Carlo (FPKMC) algorithm for continuous time and space systems involving multiple diffusing and reacting species of spherical particles in two and three dimensions. The FPKMC algorithm presented here is based on the method introduced in Oppelstrup et al. [10] and is implemented in a robust and flexible framework. Unlike standard KMC algorithms such as the n-fold algorithm, FPKMC is most efficient at low densities where it replaces the many small hops needed for reactants to find each other with large first-passage hops sampled from exact time-dependent Green's functions, without sacrificing accuracy. We describe in detail the key components of the algorithm, including the event-loop and the sampling of first-passage probability distributions, and demonstrate the accuracy of the new method. We apply the FPKMC algorithm to the challenging problem of simulation of long-term irradiation of metals, relevant to the performance and aging of nuclear materials in current and future nuclear power plants. The problem of radiation damage spans many decades of time-scales, from picosecond spikes caused by primary cascades, to years of slow damage annealing and microstructure evolution. Our implementation of the FPKMC algorithm has been able to simulate the irradiation of a metal sample for durations that are orders of magnitude longer than any previous simulations using the standard Object KMC or more recent asynchronous algorithms. (C) 2010 Elsevier Inc. All rights reserved.
C1 [Donev, Aleksandar; Bulatov, Vasily V.; Oppelstrup, Tomas; Gilmer, George H.; Sadigh, Babak; Kalos, Malvin H.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Oppelstrup, Tomas] Royal Inst Technol KTH, S-10044 Stockholm, Sweden.
RP Donev, A (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM aleks.donev@gmail.com
NR 26
TC 30
Z9 30
U1 1
U2 24
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9991
EI 1090-2716
J9 J COMPUT PHYS
JI J. Comput. Phys.
PD MAY 1
PY 2010
VL 229
IS 9
BP 3214
EP 3236
DI 10.1016/j.jcp.2009.12.038
PG 23
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 576DM
UT WOS:000276124400008
ER
PT J
AU Kadioglu, SY
Knoll, DA
AF Kadioglu, Samet Y.
Knoll, Dana A.
TI A fully second order implicit/explicit time integration technique for
hydrodynamics plus nonlinear heat conduction problems
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE Hydrodynamics; Nonlinear heat conduction; Implicit/explicit algorithm
ID PARTIAL-DIFFERENTIAL-EQUATIONS; SHOCK-CAPTURING SCHEMES; EFFICIENT
IMPLEMENTATION; RADIATION HYDRODYNAMICS; DIFFUSION LIMIT; SIMULATIONS
AB We present a fully second order implicit/explicit time integration technique for solving hydrodynamics coupled with nonlinear heat conduction problems. The idea is to hybridize an implicit and an explicit discretization in such a way to achieve second order time convergent calculations. In this scope, the hydrodynamics equations are discretized explicitly making use of the capability of well-understood explicit schemes. On the other hand, the nonlinear heat conduction is solved implicitly. Such methods are often referred to as IMEX methods [2,1,3]. The Jacobian-Free Newton Krylov (JFNK) method (e.g. [10,91) is applied to the problem in such a way as to render a nonlinearly iterated IMEX method. We solve three test problems in order to validate the numerical order of the scheme. For each test, we established second order time convergence. We support these numerical results with a modified equation analysis (MEA) [21,20]. The set of equations studied here constitute a base model for radiation hydrodynamics. Published by Elsevier Inc.
C1 [Kadioglu, Samet Y.; Knoll, Dana A.] Idaho Natl Lab, Multiphys Methods Grp, Idaho Falls, ID 83415 USA.
RP Kadioglu, SY (reprint author), Idaho Natl Lab, Multiphys Methods Grp, POB 1625,MS 3840, Idaho Falls, ID 83415 USA.
EM Samet.Kadioglu@inl.gov; dana.knoll@inl.gov
FU US Government [DEAC07-05ID14517 (INL/JOU-09-16056)]
FX The submitted manuscript has been authored by a contractor of the US
Government under Contract No. DEAC07-05ID14517 (INL/JOU-09-16056).
Accordingly, the US Government retains a non-exclusive, royalty-free
license to publish or reproduce the published form of this contribution,
or allow others to do so, for US Government purposes.
NR 22
TC 15
Z9 16
U1 1
U2 10
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9991
J9 J COMPUT PHYS
JI J. Comput. Phys.
PD MAY 1
PY 2010
VL 229
IS 9
BP 3237
EP 3249
DI 10.1016/j.jcp.2009.12.039
PG 13
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 576DM
UT WOS:000276124400009
ER
PT J
AU Gao, XF
Groth, CPT
AF Gao, Xinfeng
Groth, Clinton P. T.
TI A parallel solution - adaptive method for three-dimensional turbulent
non-premixed combusting flows
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE Parallel solution-adaptive algorithm; Adaptive mesh refinement;
Turbulent combustion; Turbulent non-premixed flames; Turbulent diffusion
flames
ID LOCAL RECTANGULAR REFINEMENT; DIRECT NUMERICAL-SIMULATION; NAVIER-STOKES
EQUATIONS; PARTIAL-DIFFERENTIAL EQUATIONS; HYPERBOLIC CONSERVATION-LAWS;
LARGE-EDDY SIMULATION; CARTESIAN GRID METHOD; LOW-MACH; FUNCTIONAL
OUTPUTS; NONPREMIXED FLAMES
AB A parallel adaptive mesh refinement (AMR) algorithm is proposed and applied to the prediction of steady turbulent non-premixed compressible combusting flows in three space dimensions. The parallel solution-adaptive algorithm solves the system of partial-differential equations governing turbulent compressible flows of reactive thermally perfect gaseous mixtures using a fully coupled finite-volume formulation on body-fitted multi-block hexahedral meshes. The compressible formulation adopted herein can readily accommodate large density variations and thermo-acoustic phenomena. A flexible block-based hierarchical data structure is used to maintain the connectivity of the solution blocks in the multi-block mesh and to facilitate automatic solution-directed mesh adaptation according to physics-based refinement criteria. For calculations of near-wall turbulence, an automatic near-wall treatment readily accommodates situations during adaptive mesh refinement where the mesh resolution may not be sufficient for directly calculating near-wall turbulence using the low-Reynolds-number formulation. Numerical results for turbulent diffusion flames, including cold- and hot-flow predictions for a bluff-body burner, are described and compared to available experimental data. The numerical results demonstrate the validity and potential of the parallel AMR approach for predicting fine-scale features of complex turbulent non-premixed flames. Published by Elsevier Inc.
C1 [Gao, Xinfeng] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Groth, Clinton P. T.] Univ Toronto, Inst Aerosp Studies, Toronto, ON M3H 5T6, Canada.
RP Gao, XF (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM XinfengGao@lbl.gov; groth@utias.utoronto.ca
NR 117
TC 21
Z9 21
U1 0
U2 8
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9991
J9 J COMPUT PHYS
JI J. Comput. Phys.
PD MAY 1
PY 2010
VL 229
IS 9
BP 3250
EP 3275
DI 10.1016/j.jcp.2010.01.001
PG 26
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 576DM
UT WOS:000276124400010
ER
PT J
AU Kelso, CM
Hooper, D
AF Kelso, Christopher M.
Hooper, Dan
TI Synchrotron emission from young and near by pulsars
SO JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
LA English
DT Article
DE cosmic ray theory; dark matter theory; particle acceleration
ID RAY POSITRON FRACTION; LARGE-AREA TELESCOPE; DARK-MATTER; COSMIC-RAYS;
ELECTRONS; RADIATION; ENERGIES; CATALOG; EXCESS; GAPS
AB The rising cosmic ray positron fraction reported by the PAMELA collaboration has lead to a great deal of interest in astrophysical sources of energetic electrons and positrons, including pulsars. In this paper, we calculate the spectrum of synchrotron emission from electrons and positrons injected from 376 young pulsars (<10(6) years) contained in the ATNF catalog, and compare our results to observations. We find that if objects such as the Vela and Crab pulsars have injected similar to 10(48) erg or more in energetic electrons and/or positrons, they are expected to produce bright and distinctive features in the synchrotron sky. Intriguingly, we predict hard synchrotron emission from these regions of the sky which is qualitatively similar to that observed by WMAP.
C1 [Kelso, Christopher M.] Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
[Hooper, Dan] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[Hooper, Dan] Fermilab Natl Accelerator Lab, Theoret Astrophys Grp, Batavia, IL 60510 USA.
RP Kelso, CM (reprint author), Univ Chicago, Dept Phys, 5720 S Ellis Ave, Chicago, IL 60637 USA.
EM ckelso@uchicago.edu; dhooper@fnal.gov
FU US Department of Energy [DE-FG02-95ER40896]; NASA [NAG5-10842]
FX This work has been supported by the US Department of Energy, including
grant DE-FG02-95ER40896, and by NASA grant NAG5-10842.
NR 39
TC 0
Z9 0
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1475-7516
J9 J COSMOL ASTROPART P
JI J. Cosmol. Astropart. Phys.
PD MAY
PY 2010
IS 5
AR 039
DI 10.1088/1475-7516/2010/05/039
PG 14
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 620HV
UT WOS:000279490800001
ER
PT J
AU Narayanan, M
Schwartz, RW
AF Narayanan, Manoj
Schwartz, Robert W.
TI Design, fabrication and finite element modeling of a new wagon wheel
flextensional transducer
SO JOURNAL OF ELECTROCERAMICS
LA English
DT Article
DE Cymbal; Piezoelectric; Finite Element Modeling; Flextensional
transducers
ID CYMBAL TRANSDUCERS; RAINBOW ACTUATORS; PERFORMANCE; STRESS; DISPLACEMENT
AB Cymbal and moonie transducers exhibit greatly improved performance characteristics compared to a simple piezoelectric disk. This behavior is mainly due to the amplifying nature of the endcaps employed in these devices. Although these endcaps improve the displacement by amplifying the small lateral displacement associated with the d (31) coefficient to a large axial displacement, this mechanism generates a very high tangential stress in the caps, which leads to a reduction in the efficiency of this transformation. In this paper, we report on a new end cap design, called the wagon wheel flextensional transducer, in which some of the clamping boundary conditions are eased by removing the metal in areas of high stress concentration. In the wagon wheel design, the tangential stresses are further reduced, thereby improving the efficiency of the transformation of the lateral to axial displacement, and consequently increasing the displacement response of the devices. Structural and impedance analyses of the devices were carried out using the commercially available software codes, ABAQUS and ATILA, respectively. Results reported for finite element modeling and experimental characterization suggest that these devices exhibit improved displacement characteristics compared to cymbal devices with similar dimensions.
C1 [Narayanan, Manoj] Argonne Natl Lab, ES Div, Argonne, IL 60439 USA.
[Schwartz, Robert W.] Missouri Univ Sci & Technol, Rolla, MO 65409 USA.
RP Narayanan, M (reprint author), Argonne Natl Lab, ES Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM mnarayanan@anl.gov; rschwartz@mst.edu
RI Narayanan, Manoj/A-4622-2011
NR 25
TC 3
Z9 4
U1 2
U2 5
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1385-3449
J9 J ELECTROCERAM
JI J. Electroceram.
PD MAY
PY 2010
VL 24
IS 3
BP 205
EP 213
DI 10.1007/s10832-008-9559-2
PG 9
WC Materials Science, Ceramics
SC Materials Science
GA 584AE
UT WOS:000276721600008
ER
PT J
AU Fadley, CS
AF Fadley, C. S.
TI X-ray photoelectron spectroscopy: Progress and perspectives
SO JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
LA English
DT Article
DE X-ray photoelectron spectroscopy; Photoemission; XPS; Photoelectron
diffraction; Photoelectron holography; Angle-resolved photoemission;
ARPES; Synchrotron radiation
ID ANGULAR-DISTRIBUTION PARAMETERS; AUGER-ELECTRON-SPECTROSCOPY; CORE-LEVEL
PHOTOEMISSION; RANGE 100-5000 EV; CIRCULAR-DICHROISM; RESOLVED
PHOTOEMISSION; FUTURE-DIRECTIONS; BINDING ENERGIES; PHOTO-IONIZATION;
SURFACE-ANALYSIS
AB In this overview, I will briefly explore some of the basic concepts and observable effects in X-ray photoelectron spectroscopy, including references to some key first publications, as well as other papers in this issue that explore many of them in more detail. I will then turn to some examples of several present and promising future applications of this diverse technique. Some of the future areas explored will be the use chemical shifts, multiplet splittings, and hard X-ray excitation in the study of strongly correlated materials; photoelectron diffraction and holography for atomic structure determinations; standing wave and hard X-ray excited photoemission for probing buried interfaces and more bulk-like properties of complex materials; valence-band mapping with soft and hard X-ray excitation; and time-resolved measurements with the sample at high ambient pressures in the multi-tort regime. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Fadley, C. S.] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
[Fadley, C. S.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Fadley, CS (reprint author), Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
EM fadley@physics.ucdavis.edu
RI MSD, Nanomag/F-6438-2012
FU Director, Office of Science, Office of Basic Energy Sciences, Materials
Sciences and Engineering Division, of the U.S. Department of Energy
[DE-AC02-05CH11231]; Helmholtz Foundation; Humboldt Foundation; Julich
Research Center
FX The work in the author's group described in this article was supported
by the Director, Office of Science, Office of Basic Energy Sciences,
Materials Sciences and Engineering Division, of the U.S. Department of
Energy under Contract Number DE-AC02-05CH11231. The author also
gratefully acknowledges the support of the Helmholtz Foundation, the
Humboldt Foundation, and the Julich Research Center. Various
collaborators have also graciously permitted the inclusion of as yet
unpublished results. Thanks also goes to A. Gray and two conscientious
reviewers for helpful suggestions concerning this manuscript.
NR 173
TC 97
Z9 99
U1 20
U2 122
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0368-2048
EI 1873-2526
J9 J ELECTRON SPECTROSC
JI J. Electron Spectrosc. Relat. Phenom.
PD MAY
PY 2010
VL 178
SI SI
BP 2
EP 32
DI 10.1016/j.elspec.2010.01.006
PG 31
WC Spectroscopy
SC Spectroscopy
GA 604RJ
UT WOS:000278295900002
ER
PT J
AU Olovsson, W
Marten, T
Holmstrom, E
Johansson, B
Abrikosov, IA
AF Olovsson, Weine
Marten, Tobias
Holmstrom, Erik
Johansson, Borje
Abrikosov, Igor A.
TI First principle calculations of core-level binding energy and Auger
kinetic energy shifts in metallic solids
SO JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
LA English
DT Article
DE Core-level shift; Disordered materials; Metallic alloys; Auger kinetic
energy
ID RAY PHOTOELECTRON-SPECTROSCOPY; GENERALIZED GRADIENT APPROXIMATION;
ELECTRONIC-STRUCTURE INFORMATION; GREEN-FUNCTION TECHNIQUE; CUXPD1-X
ALLOY SYSTEM; AUGMENTED-WAVE METHOD; AB-INITIO; PHOTOEMISSION SPECTRA;
PALLADIUM ALLOYS; CHEMICAL-SHIFTS
AB We present a brief overview of recent theoretical studies of the core-level binding energy shift (CLS) in solid metallic materials. The focus is on first principles calculations using the complete screening picture, which incorporates the initial (ground state) and final (core-ionized) state contributions of the electron photoemission process in X-ray photoelectron spectroscopy (XPS), all within density functional theory (DFT). Considering substitutionally disordered binary alloys, we demonstrate that on the one hand CLS depend on average conditions, such as volume and overall composition, while on the other hand they are sensitive to the specific local atomic environment. The possibility of employing layer resolved shifts as a tool for characterizing interface quality in fully embedded thin films is also discussed, with examples for CuNi systems. An extension of the complete screening picture to core-core-core Auger transitions is given, and new results for the influence of local environment effects on Auger kinetic energy shifts in fcc AgPd are presented. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Olovsson, Weine] Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Kyoto 6068501, Japan.
[Marten, Tobias; Abrikosov, Igor A.] Linkoping Univ, Dept Phys Chem & Biol IFM, SE-58183 Linkoping, Sweden.
[Holmstrom, Erik] Univ Austral Chile, Inst Fis, Valdivia, Chile.
[Holmstrom, Erik] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Johansson, Borje] Uppsala Univ, Dept Phys & Mat Sci, SE-75121 Uppsala, Sweden.
[Johansson, Borje] Royal Inst Technol KTH, Dept Mat & Engn, SE-10044 Stockholm, Sweden.
RP Olovsson, W (reprint author), Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Yoshida Honmachi, Kyoto 6068501, Japan.
EM weine.olovsson@gmail.com
RI Holmstrom, Erik/A-5308-2009;
OI Holmstrom, Erik/0000-0002-1198-3861; Olovsson, Weine/0000-0002-2904-0108
FU Swedish Research Council (VR); Swedish Foundation for Strategic Research
(SSF); Goran Gustafsson Foundation for Research in Natural Sciences and
Medicine; FONDECYT [11070115]; UACH DID [SR-2008-0]; Anillo ACT
[24/2006]
FX The Swedish Research Council (VR), the Swedish Foundation for Strategic
Research (SSF), and the Goran Gustafsson Foundation for Research in
Natural Sciences and Medicine are acknowledged for financial support.
E.H. would like to thank for support by FONDECYT grant 11070115, UACH
DID grant SR-2008-0 and Anillo ACT 24/2006.
NR 92
TC 13
Z9 13
U1 4
U2 30
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0368-2048
EI 1873-2526
J9 J ELECTRON SPECTROSC
JI J. Electron Spectrosc. Relat. Phenom.
PD MAY
PY 2010
VL 178
SI SI
BP 88
EP 99
DI 10.1016/j.elspec.2009.10.007
PG 12
WC Spectroscopy
SC Spectroscopy
GA 604RJ
UT WOS:000278295900006
ER
PT J
AU Baer, DR
Engelhard, MH
AF Baer, D. R.
Engelhard, M. H.
TI XPS analysis of nanostructured materials and biological surfaces
SO JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
LA English
DT Article
DE Nanomaterial; Nanoparticle; XPS; Biosurfaces; Catalysis; Particle size
ID RAY PHOTOELECTRON-SPECTROSCOPY; AUGER-ELECTRON-SPECTROSCOPY;
BINDING-ENERGY SHIFTS; OVERLAYER THICKNESS DETERMINATION; SELF-ASSEMBLED
MONOLAYERS; ULTRATHIN SIO2; MOLECULAR-ORIENTATION; CARBON NANOTUBES;
QUANTITATIVE XPS; TOF-SIMS
AB This paper examines the types of information that XPS can provide about a variety of nanostructured materials. Although it is sometimes not considered a "nanoscale analysis method," XPS can provide a great deal of information about elemental distributions, layer or coating structure and thicknesses, surface functionality, and even particles sizes on the 1-20 nm scale for sample types that may not be readily analyzed by other methods. This information is important for both synthetic nanostructured or nanosized materials and a variety of natural materials with nanostructure. Although the links between nanostructure materials and biological systems may not at first be obvious, many biological molecules and some organisms are the sizes of nanoparticles. The nanostructure of cells and microbes plays a significant role in how they interact with their environment. The interaction of biomolecules with nanoparticles is important for medical and toxicity studies. The interaction of biomolecules is important for sensor function and many nanomaterials are now the active elements in sensors. This paper first discusses how nanostructures influences XPS data as a part of understanding how simple models of sample structure and data analysis can be used to extract information about the physical and chemical structures of the materials being analyzed. Equally important, aspects of sample and analysis limitations and challenges associated with understanding nanostructured materials are indicated. Examples of the application of XPS to nanostructured and biological systems and materials are provided. (C) 2009 Published by Elsevier B.V.
C1 [Baer, D. R.; Engelhard, M. H.] Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA.
RP Baer, DR (reprint author), Pacific NW Natl Lab, Environm Mol Sci Lab, Box 999, Richland, WA 99352 USA.
EM don.baer@pnl.gov
RI Engelhard, Mark/F-1317-2010; Baer, Donald/J-6191-2013;
OI Baer, Donald/0000-0003-0875-5961; Engelhard, Mark/0000-0002-5543-0812
FU U.S. Department of Energy (DOE); DOE Offices of Basic Energy Sciences
and Biological and Environmental Research
FX This paper has evolved from research programs supported by the U.S.
Department of Energy (DOE) and research conducted as part of the
Environmental Molecular Sciences Laboratory (EMSL) User Program. It has
benefited from interactions with colleagues from around the world and
input from experts associated with ISO TC 201 Surface Chemical Analysis
and ASTM E42 Surface Analysis. We particularly want to thank Dr. P.
Nachimuthu for suggestions on the manuscript and to Drs. Cedric Powell,
M. Seah and L. Kover for their encouragement. Aspects of the work have
been supported by the DOE Offices of Basic Energy Sciences and
Biological and Environmental Research. Portions of this work were
conduced in the EMSL, a national scientific user facility sponsored by
the US Department of Energy's Office of Biological and Environmental
Research and located at Pacific Northwest National Laboratory.
NR 115
TC 77
Z9 81
U1 23
U2 103
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0368-2048
J9 J ELECTRON SPECTROSC
JI J. Electron Spectrosc. Relat. Phenom.
PD MAY
PY 2010
VL 178
SI SI
BP 415
EP 432
DI 10.1016/j.elspec.2009.09.003
PG 18
WC Spectroscopy
SC Spectroscopy
GA 604RJ
UT WOS:000278295900030
ER
PT J
AU Kim, HJ
Choi, S
Yoo, D
Ryou, JH
Hawkridge, ME
Liliental-Weber, Z
Dupuis, RD
AF Kim, Hee Jin
Choi, Suk
Yoo, Dongwon
Ryou, Jae-Hyun
Hawkridge, Michael E.
Liliental-Weber, Zuzanna
Dupuis, Russell D.
TI Digitally Alloyed Modulated Precursor Flow Epitaxial Growth of Ternary
AlGaN with Binary AlN and GaN Sub-Layers and Observation of
Compositional Inhomogeneity
SO JOURNAL OF ELECTRONIC MATERIALS
LA English
DT Article
DE Aluminum gallium nitride (AlGaN); digitally alloyed modulated precursor
flow epitaxial growth (DA-MPEG); metalorganic chemical vapor deposition
(MOCVD)
ID CHEMICAL-VAPOR-DEPOSITION; PHASE-SEPARATION; INGAN LAYERS; BAND-GAP;
SAPPHIRE; TEMPLATES; THICK
AB We report the growth of ternary aluminum gallium nitride (AlGaN) layers on AlN/sapphire template/substrates by digitally alloyed modulated precursor flow epitaxial growth (DA-MPEG), which combined an MPEG AlN sub-layer with a conventional metalorganic chemical vapor deposition (MOCVD)-grown GaN sub-layer. The overall composition in DA-MPEG Al (x) Ga(1-x) N was controlled by adjustment of the growth time (i.e., the thickness) of the GaN sub-layer. As the GaN sub-layer growth time increased, the Al composition in AlGaN decreased to 50%, but the surface morphology of the AlGaN layer became rough, and a three-dimensional structure with islands appeared for the DA-MPEG AlGaN with relatively thick GaN sub-layers, possibly resulting from the Ga adatom surface migration behavior and/or the strain built up from lattice mismatch between AlN and GaN sub-layers with increasing GaN sub-layer growth time. Through strain analysis by high-resolution x-ray diffraction, reciprocal space mapping, and scanning transmission electron microscopy, it was found that there was compositional inhomogeneity in the DA-MPEG AlGaN with AlN and GaN binary sub-layers for the case of the layer with relatively thick GaN sub-layers.
C1 [Kim, Hee Jin; Choi, Suk; Yoo, Dongwon; Ryou, Jae-Hyun; Dupuis, Russell D.] Georgia Inst Technol, Ctr Compound Semicond, Atlanta, GA 30332 USA.
[Kim, Hee Jin; Choi, Suk; Yoo, Dongwon; Ryou, Jae-Hyun; Dupuis, Russell D.] Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA.
[Yoo, Dongwon; Dupuis, Russell D.] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
[Hawkridge, Michael E.; Liliental-Weber, Zuzanna] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Kim, HJ (reprint author), Georgia Inst Technol, Ctr Compound Semicond, 777 Atlantic Dr NW, Atlanta, GA 30332 USA.
EM jaehyun.ryou@ece.gatech.edu
RI Liliental-Weber, Zuzanna/H-8006-2012
FU Steve W. Chaddick Endowed Chair in Electro-Optics; Georgia Research
Alliance
FX R. D. D. acknowledges the support of the Steve W. Chaddick Endowed Chair
in Electro-Optics and the Georgia Research Alliance.
NR 25
TC 1
Z9 1
U1 1
U2 5
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0361-5235
J9 J ELECTRON MATER
JI J. Electron. Mater.
PD MAY
PY 2010
VL 39
IS 5
BP 466
EP 472
DI 10.1007/s11664-010-1098-3
PG 7
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Physics, Applied
SC Engineering; Materials Science; Physics
GA 584RP
UT WOS:000276770600002
ER
PT J
AU Kaplan, DI
Demirkanli, DI
Molz, FJ
Beals, DM
Cadieux, JR
Halverson, JE
AF Kaplan, D. I.
Demirkanli, D. I.
Molz, F. J.
Beals, D. M.
Cadieux, J. R., Jr.
Halverson, J. E.
TI Upward movement of plutonium to surface sediments during an 11-year
field study
SO JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
LA English
DT Article
DE Plutonium; Thermal ionization mass spectroscopy; TIMS; Plants; Vadose
zone; Concentration ratio; Isotopes
ID SITE VADOSE ZONE; TRANSPORT; PLANTS; ENVIRONMENT; MIGRATION; MOBILITY;
SOIL
AB An 11-year lysimeter study was established to monitor the movement of Pu through vadose zone sediments. Sediment Pu concentrations as a function of depth indicated that some Pu moved upward from the buried source material. Subsequent numerical modeling suggested that the upward movement was largely the result of invading grasses taking up the Pu and translocating it upward. The objective of this study was to determine if the Pu of surface sediments originated from atmosphere fallout or from the buried lysimeter source material (weapons-grade Pu), providing additional evidence that plants were involved in the upward migration of Pu. The (240)Pu/(239)Pu and (242)Pu/(239)Pu atomic fraction ratios of the lysimeter surface sediments, as determined by Thermal Ionization Mass Spectroscopy (TIMS), were 0.063 and 0.00045, respectively; consistent with the signatures of the weapons-grade Pu. Our numerical simulations indicate that because plants create a large water flux, small concentrations over multiple years may result in a measurable accumulation of Pu on the ground surface. These results may have implications on the conceptual model for calculating risk associated with long-term stewardship and monitored natural attenuation management of Pu contaminated subsurface and surface sediments. (C) 2010 Elsevier Ltd. All rights reserved.
C1 [Kaplan, D. I.; Beals, D. M.; Cadieux, J. R., Jr.; Halverson, J. E.] Savannah River Natl Lab, Aiken, SC 29808 USA.
[Demirkanli, D. I.; Molz, F. J.] Clemson Univ, Clemson, SC USA.
RP Kaplan, DI (reprint author), Savannah River Natl Lab, Aiken, SC 29808 USA.
EM daniel.kaplan@srnl.doe.gov
FU United States Department of Energy [DE-AC09-96SR18500]; South Carolina
Universities Research and Education Foundation (SCUREF)
FX This project was supported by the following United States Department of
Energy programs: Environmental Remediation Science Program (ERSP, within
the Office of Science) and South Carolina Universities Research and
Education Foundation (SCUREF: "Radiochemistry Education Award Program").
A portion of the work was performed at Clemson University within the
Department of Environmental Engineering & Science. Work at the Savannah
River National Laboratory (SRNL) was performed under the auspices of the
U.S. Department of Energy (DOE) contract DE-AC09-96SR18500.
NR 29
TC 4
Z9 4
U1 2
U2 17
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0265-931X
J9 J ENVIRON RADIOACTIV
JI J. Environ. Radioact.
PD MAY
PY 2010
VL 101
IS 5
BP 338
EP 344
DI 10.1016/j.jenvrad.2010.01.007
PG 7
WC Environmental Sciences
SC Environmental Sciences & Ecology
GA 594IP
UT WOS:000277530800002
PM 20227801
ER
PT J
AU Yusim, K
Fischer, W
Yoon, H
Thurmond, J
Fenimore, PW
Lauer, G
Korber, B
Kuiken, C
AF Yusim, Karina
Fischer, William
Yoon, Hyejin
Thurmond, James
Fenimore, Paul W.
Lauer, Georg
Korber, Bette
Kuiken, Carla
TI Genotype 1 and global hepatitis C T-cell vaccines designed to optimize
coverage of genetic diversity
SO JOURNAL OF GENERAL VIROLOGY
LA English
DT Article
ID HUMAN-IMMUNODEFICIENCY-VIRUS; CHRONIC LIVER-DISEASE; IMMUNE-RESPONSES;
VIRAL CLEARANCE; HIV-1 VACCINE; PEGINTERFERON ALPHA-2A; PLUS RIBAVIRIN;
RHESUS-MONKEYS; UNITED-STATES; BLOOD-DONORS
AB Immunological control of hepatitis C virus (HCV) is possible and is probably mediated by host T-cell responses, but the genetic diversity of the virus poses a major challenge to vaccine development. We considered monovalent and polyvalent candidates for an HCV vaccine, including natural, consensus and synthetic 'mosaic' sequence cocktails. Mosaic vaccine reagents were designed using a computational approach first applied to and demonstrated experimentally for human immunodeficiency virus type 1 (HIV-Delta). Mosaic proteins resemble natural proteins, but are assembled from fragments of natural sequences via a genetic algorithm and optimized to maximize the coverage of potential T-cell epitopes (all 9-mers) found in natural sequences and to minimize the inclusion of rare 9-mers to avoid vaccine-specific responses. Genotype 1-specific and global vaccine cocktails were evaluated. Among vaccine candidates considered, polyvalent mosaic sequences provided the best coverage of both known and potential epitopes and had the fewest rare epitopes. A global vaccine based on conserved proteins across genotypes may be feasible, as a five-antigen mosaic cocktail provided 90, 77 and 70% coverage of the Core, NS3 and NS4 proteins, respectively; protein coverage diminished with increased protein variability, dropping to 38% for NS2. For the genotype 1-specific vaccine, the H77 prototype vaccine sequence matched only 50% of the potential epitopes in the population, whilst a polyprotein three-antigen mosaic cocktail increased potential epitope coverage to 83%. More than 75% coverage of all HCV proteins was achieved with a three-antigen mosaic cocktail, suggesting that genotype-specific vaccines could also include the more variable proteins.
C1 [Yusim, Karina; Fischer, William; Yoon, Hyejin; Thurmond, James; Fenimore, Paul W.; Korber, Bette; Kuiken, Carla] Los Alamos Natl Lab, Div Theory, Los Alamos, NM 87545 USA.
[Lauer, Georg] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Gastrointestinal Unit, Boston, MA 02114 USA.
RP Yusim, K (reprint author), Los Alamos Natl Lab, Div Theory, Los Alamos, NM 87545 USA.
EM kyusim@lanl.gov
OI Fischer, Will/0000-0003-4579-4062; Korber, Bette/0000-0002-2026-5757
FU Los Alamos National Laboratory [LDRD 20050155DR]
FX Funding for this work was provided by the Los Alamos National Laboratory
Directed Research Program (LDRD 20050155DR, 'Rational Vaccine Design').
We thank Jennifer Macke for assistance in editing the manuscript.
NR 51
TC 21
Z9 21
U1 0
U2 0
PU SOC GENERAL MICROBIOLOGY
PI READING
PA MARLBOROUGH HOUSE, BASINGSTOKE RD, SPENCERS WOODS, READING RG7 1AG,
BERKS, ENGLAND
SN 0022-1317
J9 J GEN VIROL
JI J. Gen. Virol.
PD MAY
PY 2010
VL 91
BP 1194
EP 1206
DI 10.1099/vir.0.017491-0
PN 5
PG 13
WC Biotechnology & Applied Microbiology; Virology
SC Biotechnology & Applied Microbiology; Virology
GA 597MH
UT WOS:000277761100012
PM 20053820
ER
PT J
AU Chekanov, S
Derrick, M
Magill, S
Musgrave, B
Nicholass, D
Repond, J
Yoshida, R
Mattingly, MCK
Antonioli, P
Bari, G
Bellagamba, L
Boscherini, D
Bruni, A
Bruni, G
Cindolo, F
Corradi, M
Iacobucci, G
Margotti, A
Nania, R
Polini, A
Antonelli, S
Basile, M
Bindi, M
Cifarelli, L
Contin, A
De Pasquale, S
Sartorelli, G
Zichichi, A
Bartsch, D
Brock, I
Hartmann, H
Hilger, E
Jakob, HP
Jungst, M
Nuncio-Quiroz, AE
Paul, E
Samson, U
Schonberg, V
Shehzadi, R
Wlasenko, M
Morris, JD
Kaur, M
Kaur, P
Singh, I
Capua, M
Fazio, S
Mastroberardino, A
Schioppa, M
Susinno, G
Tassi, E
Kim, JY
Ibrahim, ZA
Idris, FM
Kamaluddin, B
Abdullah, WATW
Ning, Y
Ren, Z
Sciulli, F
Chwastowski, J
Eskreys, A
Figiel, J
Galas, A
Olkiewicz, K
Pawlik, B
Stopa, P
Zawiejski, L
Adamczyk, L
Bold, T
Grabowska-Bold, I
Kisielewska, D
Lukasik, J
Przybycien, M
Suszycki, L
Kotanski, A
Slominski, W
Bachynska, O
Behnke, O
Behr, J
Behrens, U
Blohm, C
Borras, K
Bot, D
Ciesielski, R
Coppola, N
Fang, S
Geiser, A
Gottlicher, P
Grebenyuk, J
Gregor, I
Haas, T
Hain, W
Huttmann, A
Januschek, F
Kahle, B
Katkov, II
Klein, U
Kotz, U
Kowalski, H
Libov, V
Lisovyi, M
Lobodzinska, E
Lohr, B
Mankel, R
Melzer-Pellmann, IA
Miglioranzi, S
Montanari, A
Namsoo, T
Notz, D
Parenti, A
Roloff, P
Rubinsky, I
Schneekloth, U
Spiridonov, A
Szuba, D
Szuba, J
Theedt, T
Tomaszewska, J
Wolf, G
Wrona, K
Yagues-Molina, AG
Youngman, C
Zeuner, W
Drugakov, V
Lohmann, W
Schlenstedt, S
Barbagli, G
Gallo, E
Pelfer, PG
Bamberger, A
Dobur, D
Karstens, F
Vlasov, NN
Bussey, PJ
Doyle, AT
Forrest, M
Saxon, DH
Skillicorn, IO
Gialas, I
Papageorgiu, K
Holm, U
Klanner, R
Lohrmann, E
Perrey, H
Schleper, P
Schorner-Sadenius, T
Sztuk, J
Stadie, H
Turcato, M
Long, KR
Tapper, AD
Matsumoto, T
Nagano, K
Tokushuku, K
Yamada, S
Yamazaki, Y
Barakbaev, AN
Boos, EG
Pokrovskiy, NS
Zhautykov, BO
Aushev, V
Borodin, M
Kadenko, I
Korol, I
Kuprash, O
Lontkovskyi, D
Makarenko, I
Onishchuk, Y
Salii, A
Sorokin, I
Verbytskyi, A
Viazlo, V
Volynets, O
Zenaiev, O
Zolko, M
Son, D
de Favereau, J
Piotrzkowski, K
Barreiro, F
Glasman, C
Jimenez, M
del Peso, J
Ron, E
Terron, J
Uribe-Estrada, C
Corriveau, F
Schwartz, J
Zhou, C
Tsurugai, T
Antonov, A
Dolgoshein, BA
Gladkov, D
Sosnovtsev, V
Stifutkin, A
Suchkov, S
Dementiev, RK
Ermolov, PF
Gladilin, LK
Golubkov, YA
Khein, LA
Korzhavina, IA
Kuzmin, VA
Levchenko, BB
Lukina, OY
Proskuryakov, AS
Shcheglova, LM
Zotkin, DS
Abt, I
Caldwell, A
Kollar, D
Reisert, B
Schmidke, WB
Grigorescu, G
Keramidas, A
Koffeman, E
Kooijman, P
Pellegrino, A
Tiecke, H
Vazquez, M
Wiggers, L
Brummer, N
Bylsma, B
Durkin, LS
Lee, A
Ling, TY
Cooper-Sarkar, AM
Devenish, RCE
Ferrando, J
Foster, B
Gwenlan, C
Horton, K
Oliver, K
Robertson, A
Walczak, R
Bertolin, A
Dal Corso, F
Dusini, S
Longhin, A
Stanco, L
Brugnera, R
Carlin, R
Garfagnini, A
Limentani, S
Raval, A
Whitmore, JJ
Iga, Y
D'Agostini, G
Marini, G
Nigro, A
Hart, JC
Abramowicz, H
Ingbir, R
Kananov, S
Levy, A
Stern, A
Ishitsuka, M
Kanno, T
Kuze, M
Maeda, J
Hori, R
Okazaki, N
Shimizu, S
Hamatsu, R
Kitamura, S
Ota, O
Ri, YD
Costa, M
Ferrero, MI
Monaco, V
Sacchi, R
Sola, V
Solano, A
Arneodo, M
Ruspa, M
Fourletov, S
Martin, JF
Stewart, TP
Boutle, SK
Butterworth, JM
Jones, TW
Loizides, JH
Wing, M
Brzozowska, B
Ciborowski, J
Grzelak, G
Kulinski, P
Luzniak, P
Malka, J
Nowak, RJ
Pawlak, JM
Perlanski, W
Zarnecki, AF
Adamus, M
Plucinski, P
Tymieniecka, T
Eisenberg, Y
Hochman, D
Karshon, U
Brownson, E
Reeder, DD
Savin, AA
Smith, WH
Wolfe, H
Bhadra, S
Catterall, CD
Hartner, G
Noor, U
Whyte, J
AF Chekanov, S.
Derrick, M.
Magill, S.
Musgrave, B.
Nicholass, D.
Repond, J.
Yoshida, R.
Mattingly, M. C. K.
Antonioli, P.
Bari, G.
Bellagamba, L.
Boscherini, D.
Bruni, A.
Bruni, G.
Cindolo, F.
Corradi, M.
Iacobucci, G.
Margotti, A.
Nania, R.
Polini, A.
Antonelli, S.
Basile, M.
Bindi, M.
Cifarelli, L.
Contin, A.
De Pasquale, S.
Sartorelli, G.
Zichichi, A.
Bartsch, D.
Brock, I.
Hartmann, H.
Hilger, E.
Jakob, H. -P.
Juengst, M.
Nuncio-Quiroz, A. E.
Paul, E.
Samson, U.
Schoenberg, V.
Shehzadi, R.
Wlasenko, M.
Morris, J. D.
Kaur, M.
Kaur, P.
Singh, I.
Capua, M.
Fazio, S.
Mastroberardino, A.
Schioppa, M.
Susinno, G.
Tassi, E.
Kim, J. Y.
Ibrahim, Z. A.
Idris, F. Mohamad
Kamaluddin, B.
Abdullah, W. A. T. Wan
Ning, Y.
Ren, Z.
Sciulli, F.
Chwastowski, J.
Eskreys, A.
Figiel, J.
Galas, A.
Olkiewicz, K.
Pawlik, B.
Stopa, P.
Zawiejski, L.
Adamczyk, L.
Bold, T.
Grabowska-Bold, I.
Kisielewska, D.
Lukasik, J.
Przybycien, M.
Suszycki, L.
Kotanski, A.
Slominski, W.
Bachynska, O.
Behnke, O.
Behr, J.
Behrens, U.
Blohm, C.
Borras, K.
Bot, D.
Ciesielski, R.
Coppola, N.
Fang, S.
Geiser, A.
Goettlicher, P.
Grebenyuk, J.
Gregor, I.
Haas, T.
Hain, W.
Huettmann, A.
Januschek, F.
Kahle, B.
Katkov, I. I.
Klein, U.
Koetz, U.
Kowalski, H.
Libov, V.
Lisovyi, M.
Lobodzinska, E.
Loehr, B.
Mankel, R.
Melzer-Pellmann, I. -A.
Miglioranzi, S.
Montanari, A.
Namsoo, T.
Notz, D.
Parenti, A.
Roloff, P.
Rubinsky, I.
Schneekloth, U.
Spiridonov, A.
Szuba, D.
Szuba, J.
Theedt, T.
Tomaszewska, J.
Wolf, G.
Wrona, K.
Yaguees-Molina, A. G.
Youngman, C.
Zeuner, W.
Drugakov, V.
Lohmann, W.
Schlenstedt, S.
Barbagli, G.
Gallo, E.
Pelfer, P. G.
Bamberger, A.
Dobur, D.
Karstens, F.
Vlasov, N. N.
Bussey, P. J.
Doyle, A. T.
Forrest, M.
Saxon, D. H.
Skillicorn, I. O.
Gialas, I.
Papageorgiu, K.
Holm, U.
Klanner, R.
Lohrmann, E.
Perrey, H.
Schleper, P.
Schoerner-Sadenius, T.
Sztuk, J.
Stadie, H.
Turcato, M.
Long, K. R.
Tapper, A. D.
Matsumoto, T.
Nagano, K.
Tokushuku, K.
Yamada, S.
Yamazaki, Y.
Barakbaev, A. N.
Boos, E. G.
Pokrovskiy, N. S.
Zhautykov, B. O.
Aushev, V.
Borodin, M.
Kadenko, I.
Korol, Ie.
Kuprash, O.
Lontkovskyi, D.
Makarenko, I.
Onishchuk, Yu.
Salii, A.
Sorokin, Iu.
Verbytskyi, A.
Viazlo, V.
Volynets, O.
Zenaiev, O.
Zolko, M.
Son, D.
de Favereau, J.
Piotrzkowski, K.
Barreiro, F.
Glasman, C.
Jimenez, M.
del Peso, J.
Ron, E.
Terron, J.
Uribe-Estrada, C.
Corriveau, F.
Schwartz, J.
Zhou, C.
Tsurugai, T.
Antonov, A.
Dolgoshein, B. A.
Gladkov, D.
Sosnovtsev, V.
Stifutkin, A.
Suchkov, S.
Dementiev, R. K.
Ermolov, P. F.
Gladilin, L. K.
Golubkov, Yu. A.
Khein, L. A.
Korzhavina, I. A.
Kuzmin, V. A.
Levchenko, B. B.
Lukina, O. Yu.
Proskuryakov, A. S.
Shcheglova, L. M.
Zotkin, D. S.
Abt, I.
Caldwell, A.
Kollar, D.
Reisert, B.
Schmidke, W. B.
Grigorescu, G.
Keramidas, A.
Koffeman, E.
Kooijman, P.
Pellegrino, A.
Tiecke, H.
Vazquez, M.
Wiggers, L.
Bruemmer, N.
Bylsma, B.
Durkin, L. S.
Lee, A.
Ling, T. Y.
Cooper-Sarkar, A. M.
Devenish, R. C. E.
Ferrando, J.
Foster, B.
Gwenlan, C.
Horton, K.
Oliver, K.
Robertson, A.
Walczak, R.
Bertolin, A.
Dal Corso, F.
Dusini, S.
Longhin, A.
Stanco, L.
Brugnera, R.
Carlin, R.
Garfagnini, A.
Limentani, S.
Raval, A.
Whitmore, J. J.
Iga, Y.
D'Agostini, G.
Marini, G.
Nigro, A.
Hart, J. C.
Abramowicz, H.
Ingbir, R.
Kananov, S.
Levy, A.
Stern, A.
Ishitsuka, M.
Kanno, T.
Kuze, M.
Maeda, J.
Hori, R.
Okazaki, N.
Shimizu, S.
Hamatsu, R.
Kitamura, S.
Ota, O.
Ri, Y. D.
Costa, M.
Ferrero, M. I.
Monaco, V.
Sacchi, R.
Sola, V.
Solano, A.
Arneodo, M.
Ruspa, M.
Fourletov, S.
Martin, J. F.
Stewart, T. P.
Boutle, S. K.
Butterworth, J. M.
Jones, T. W.
Loizides, J. H.
Wing, M.
Brzozowska, B.
Ciborowski, J.
Grzelak, G.
Kulinski, P.
Luzniak, P.
Malka, J.
Nowak, R. J.
Pawlak, J. M.
Perlanski, W.
Zarnecki, A. F.
Adamus, M.
Plucinski, P.
Tymieniecka, T.
Eisenberg, Y.
Hochman, D.
Karshon, U.
Brownson, E.
Reeder, D. D.
Savin, A. A.
Smith, W. H.
Wolfe, H.
Bhadra, S.
Catterall, C. D.
Hartner, G.
Noor, U.
Whyte, J.
CA ZEUS Collaboration
TI Measurement of J/psi photoproduction at large momentum transfer at HERA
SO JOURNAL OF HIGH ENERGY PHYSICS
LA English
DT Article
DE Lepton-Nucleon Scattering
ID VECTOR-MESON PRODUCTION; CENTRAL TRACKING DETECTOR; INELASTIC EP
SCATTERING; ZEUS BARREL CALORIMETER; LARGE-T; DIFFRACTIVE
PHOTOPRODUCTION; PERTURBATION-THEORY; ELASTIC-SCATTERING; QCD;
CONSTRUCTION
AB The proton-dissociative diffractive photoproduction of J/psi mesons has been studied in ep collisions with the ZEUS detector at HERA using an integrated luminosity of 112 pb(-1). The cross section is presented as a function of the photon-proton centre-of-mass energy and of the squared four-momentum transfer at the proton vertex. The results are compared to perturbative QCD calculations.
C1 [Chekanov, S.; Derrick, M.; Magill, S.; Musgrave, B.; Nicholass, D.; Repond, J.; Yoshida, R.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Mattingly, M. C. K.] Andrews Univ, Berrien Springs, MI 49104 USA.
[Antonioli, P.; Bari, G.; Bellagamba, L.; Boscherini, D.; Bruni, A.; Bruni, G.; Cindolo, F.; Corradi, M.; Iacobucci, G.; Margotti, A.; Nania, R.; Polini, A.; Antonelli, S.; Basile, M.; Bindi, M.; Cifarelli, L.; Contin, A.; De Pasquale, S.; Sartorelli, G.; Zichichi, A.] Ist Nazl Fis Nucl, I-40126 Bologna, Italy.
[Antonelli, S.; Basile, M.; Bindi, M.; Cifarelli, L.; Contin, A.; De Pasquale, S.; Sartorelli, G.; Zichichi, A.] Univ Bologna, Bologna, Italy.
[Bartsch, D.; Brock, I.; Hartmann, H.; Hilger, E.; Jakob, H. -P.; Juengst, M.; Nuncio-Quiroz, A. E.; Paul, E.; Samson, U.; Schoenberg, V.; Shehzadi, R.; Wlasenko, M.] Univ Bonn, Inst Phys, D-5300 Bonn, Germany.
[Morris, J. D.] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England.
[Kaur, M.; Kaur, P.; Singh, I.] Panjab Univ, Dept Phys, Chandigarh 160014, India.
[Kaur, P.; Singh, I.; Abramowicz, H.] Max Planck Inst, Munich, Germany.
[Nicholass, D.] UCL, London WC1E 6BT, England.
[Capua, M.; Fazio, S.; Mastroberardino, A.; Schioppa, M.; Susinno, G.; Tassi, E.] Univ Calabria, Dept Phys, I-87036 Cosenza, Italy.
[Capua, M.; Fazio, S.; Mastroberardino, A.; Schioppa, M.; Susinno, G.; Tassi, E.] INFN, Cosenza, Italy.
[Kim, J. Y.] Chonnam Natl Univ, Kwangju, South Korea.
[Ibrahim, Z. A.; Idris, F. Mohamad; Kamaluddin, B.; Abdullah, W. A. T. Wan] Univ Malaya, Kuala Lumpur 50603, Malaysia.
[Ning, Y.; Ren, Z.; Sciulli, F.] Columbia Univ, Nevis Labs, Irvington, NY 10027 USA.
[Chwastowski, J.; Eskreys, A.; Figiel, J.; Galas, A.; Olkiewicz, K.; Pawlik, B.; Stopa, P.; Zawiejski, L.] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland.
[Adamczyk, L.; Bold, T.; Grabowska-Bold, I.; Kisielewska, D.; Lukasik, J.; Przybycien, M.; Suszycki, L.] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Krakow, Poland.
[Kotanski, A.; Slominski, W.] Jagellonian Univ, Dept Phys, Krakow, Poland.
[Bachynska, O.; Behnke, O.; Behr, J.; Behrens, U.; Blohm, C.; Borras, K.; Bot, D.; Ciesielski, R.; Coppola, N.; Fang, S.; Geiser, A.; Goettlicher, P.; Grebenyuk, J.; Gregor, I.; Haas, T.; Hain, W.; Huettmann, A.; Januschek, F.; Kahle, B.; Katkov, I. I.; Klein, U.; Koetz, U.; Kowalski, H.; Libov, V.; Lisovyi, M.; Lobodzinska, E.; Loehr, B.; Mankel, R.; Melzer-Pellmann, I. -A.; Miglioranzi, S.; Montanari, A.; Namsoo, T.; Notz, D.; Parenti, A.; Roloff, P.; Rubinsky, I.; Schneekloth, U.; Spiridonov, A.; Szuba, D.; Szuba, J.; Theedt, T.; Tomaszewska, J.; Wolf, G.; Wrona, K.; Yaguees-Molina, A. G.; Youngman, C.; Zeuner, W.] Deutsch Elektronen Synchrotron DESY, Hamburg, Germany.
[Drugakov, V.; Lohmann, W.; Schlenstedt, S.] Deutsch Elektronen Synchrotron DESY, Zeuthen, Germany.
[Barbagli, G.; Gallo, E.; Pelfer, P. G.] Ist Nazl Fis Nucl, I-50125 Florence, Italy.
[Pelfer, P. G.] Univ Florence, Florence, Italy.
[Bamberger, A.; Dobur, D.; Karstens, F.; Vlasov, N. N.] Univ Freiburg, Fak Phys, D-7800 Freiburg, Germany.
[Bussey, P. J.; Doyle, A. T.; Forrest, M.; Saxon, D. H.; Skillicorn, I. O.] Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland.
[Gialas, I.; Papageorgiu, K.] Univ Aegean, Dept Engn Management & Finance, Chios, Greece.
[Holm, U.; Klanner, R.; Lohrmann, E.; Perrey, H.; Schleper, P.; Schoerner-Sadenius, T.; Sztuk, J.; Stadie, H.; Turcato, M.] Univ Hamburg, Inst Exp Phys, Hamburg, Germany.
[Long, K. R.; Tapper, A. D.] Univ London Imperial Coll Sci Technol & Med, High Energy Nucl Phys Grp, London, England.
[Matsumoto, T.; Nagano, K.; Tokushuku, K.; Yamada, S.; Yamazaki, Y.] KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki, Japan.
[Barakbaev, A. N.; Boos, E. G.; Pokrovskiy, N. S.; Zhautykov, B. O.] Minist Educ & Sci Kazakhstan, Inst Phys & Technol, Alma Ata, Kazakhstan.
[Aushev, V.; Borodin, M.; Kadenko, I.; Korol, Ie.; Kuprash, O.; Lontkovskyi, D.; Makarenko, I.; Onishchuk, Yu.; Salii, A.; Sorokin, Iu.; Verbytskyi, A.; Viazlo, V.; Volynets, O.; Zenaiev, O.; Zolko, M.] Natl Acad Sci, Inst Nucl Res, Kiev, Ukraine.
[Aushev, V.; Borodin, M.; Kadenko, I.; Korol, Ie.; Kuprash, O.; Lontkovskyi, D.; Makarenko, I.; Onishchuk, Yu.; Salii, A.; Sorokin, Iu.; Verbytskyi, A.; Viazlo, V.; Volynets, O.; Zenaiev, O.; Zolko, M.] Kiev Natl Univ, Kiev, Ukraine.
[Son, D.] Kyungpook Natl Univ, Ctr High Energy Phys, Taegu, South Korea.
[de Favereau, J.; Piotrzkowski, K.] Catholic Univ Louvain, Inst Phys Nucl, B-1348 Louvain, Belgium.
[Barreiro, F.; Glasman, C.; Jimenez, M.; del Peso, J.; Ron, E.; Terron, J.; Uribe-Estrada, C.] Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain.
[Corriveau, F.; Schwartz, J.; Zhou, C.] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
[Tsurugai, T.] Meiji Gakuin Univ, Fac Gen Educ, Yokohama, Kanagawa, Japan.
[Antonov, A.; Dolgoshein, B. A.; Gladkov, D.; Sosnovtsev, V.; Stifutkin, A.; Suchkov, S.] Moscow Engn Phys Inst, Moscow 115409, Russia.
[Dementiev, R. K.; Ermolov, P. F.; Gladilin, L. K.; Golubkov, Yu. A.; Khein, L. A.; Korzhavina, I. A.; Kuzmin, V. A.; Levchenko, B. B.; Lukina, O. Yu.; Proskuryakov, A. S.; Shcheglova, L. M.; Zotkin, D. S.] Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow, Russia.
[Abt, I.; Caldwell, A.; Kollar, D.; Reisert, B.; Schmidke, W. B.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
[Grigorescu, G.; Keramidas, A.; Koffeman, E.; Kooijman, P.; Pellegrino, A.; Tiecke, H.; Vazquez, M.; Wiggers, L.] NIKHEF, Amsterdam, Netherlands.
[Grigorescu, G.; Keramidas, A.; Koffeman, E.; Kooijman, P.; Pellegrino, A.; Tiecke, H.; Vazquez, M.; Wiggers, L.] Univ Amsterdam, Amsterdam, Netherlands.
[Bruemmer, N.; Bylsma, B.; Durkin, L. S.; Lee, A.; Ling, T. Y.] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
[Cooper-Sarkar, A. M.; Devenish, R. C. E.; Ferrando, J.; Foster, B.; Gwenlan, C.; Horton, K.; Oliver, K.; Robertson, A.; Walczak, R.] Univ Oxford, Dept Phys, Oxford, England.
[Bertolin, A.; Dal Corso, F.; Dusini, S.; Longhin, A.; Stanco, L.; Brugnera, R.; Carlin, R.; Garfagnini, A.; Limentani, S.] Ist Nazl Fis Nucl, Padua, Italy.
[Brugnera, R.; Carlin, R.; Garfagnini, A.; Limentani, S.] Univ Padua, Dipartimento Fis, Padua, Italy.
[Raval, A.; Whitmore, J. J.] Penn State Univ, Dept Phys, University Pk, PA 16802 USA.
[Iga, Y.] Polytech Univ, Sagamihara, Kanagawa, Japan.
[D'Agostini, G.; Marini, G.; Nigro, A.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
[D'Agostini, G.; Marini, G.; Nigro, A.] Ist Nazl Fis Nucl, Rome, Italy.
[Hart, J. C.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Abramowicz, H.; Ingbir, R.; Kananov, S.; Levy, A.; Stern, A.] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys, IL-69978 Tel Aviv, Israel.
[Ishitsuka, M.; Kanno, T.; Kuze, M.; Maeda, J.] Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan.
[Hori, R.; Okazaki, N.; Shimizu, S.] Univ Tokyo, Dept Phys, Tokyo 113, Japan.
[Hamatsu, R.; Kitamura, S.; Ota, O.; Ri, Y. D.] Tokyo Metropolitan Univ, Dept Phys, Tokyo, Japan.
[Costa, M.; Ferrero, M. I.; Monaco, V.; Sacchi, R.; Sola, V.; Solano, A.] Univ Turin, Turin, Italy.
[Costa, M.; Ferrero, M. I.; Monaco, V.; Sacchi, R.; Sola, V.; Solano, A.; Arneodo, M.; Ruspa, M.] Ist Nazl Fis Nucl, I-10125 Turin, Italy.
[Arneodo, M.; Ruspa, M.] Univ Piemonte Orientale, Novara, Italy.
[Fourletov, S.; Martin, J. F.; Stewart, T. P.] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada.
[Boutle, S. K.; Butterworth, J. M.; Jones, T. W.; Loizides, J. H.; Wing, M.] UCL, Dept Phys & Astron, London, England.
[Brzozowska, B.; Ciborowski, J.; Grzelak, G.; Kulinski, P.; Luzniak, P.; Malka, J.; Nowak, R. J.; Pawlak, J. M.; Perlanski, W.; Zarnecki, A. F.] Warsaw Univ, Inst Expt Phys, Warsaw, Poland.
[Adamus, M.; Plucinski, P.; Tymieniecka, T.] Inst Nucl Studies, PL-00681 Warsaw, Poland.
[Eisenberg, Y.; Hochman, D.; Karshon, U.] Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel.
[Brownson, E.; Reeder, D. D.; Savin, A. A.; Smith, W. H.; Wolfe, H.] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
[Bhadra, S.; Catterall, C. D.; Hartner, G.; Noor, U.; Whyte, J.] York Univ, Dept Phys, N York, ON M3J 1P3, Canada.
[Tassi, E.] Univ Hamburg, Inst Expt Phys, Hamburg, Germany.
[Spiridonov, A.] Inst Theoret & Expt Phys, Moscow 117259, Russia.
[Szuba, D.] INP, Krakow, Poland.
[Szuba, J.] AGH Univ Sci & Technol, FPACS, Krakow, Poland.
[Gialas, I.; Boutle, S. K.] DESY, Hamburg, Germany.
[Ciborowski, J.] Univ Lodz, PL-90131 Lodz, Poland.
[Tymieniecka, T.] Univ Podlasie, Siedlce, Poland.
RP Chekanov, S (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI De Pasquale, Salvatore/B-9165-2008; dusini, stefano/J-3686-2012; Doyle,
Anthony/C-5889-2009; Fazio, Salvatore /G-5156-2010; IBRAHIM, ZAINOL
ABIDIN/C-1121-2010; Ferrando, James/A-9192-2012; Gladilin,
Leonid/B-5226-2011; Levchenko, B./D-9752-2012; Proskuryakov,
Alexander/J-6166-2012; Dementiev, Roman/K-7201-2012; Korzhavina,
Irina/D-6848-2012; Wiggers, Leo/B-5218-2015; Tassi, Enrico/K-3958-2015;
Suchkov, Sergey/M-6671-2015
OI De Pasquale, Salvatore/0000-0001-9236-0748; dusini,
stefano/0000-0002-1128-0664; Arneodo, Michele/0000-0002-7790-7132;
Doyle, Anthony/0000-0001-6322-6195; Ferrando, James/0000-0002-1007-7816;
Gladilin, Leonid/0000-0001-9422-8636; Wiggers, Leo/0000-0003-1060-0520;
FU Chonnam National University, South Korea; Institute of Aviation, Warsaw,
Poland; Marie Curie Actions Transfer of Knowledge project COCOS
[MTKD-CT-2004-517186]; FEB, Hamburg, Germany; Moscow State University,
Russia; University of Liverpool, United Kingdom; Warsaw University,
Poland; DESY, Germany; Russian Foundation for Basic Research
[05-02-39028-NSFC-a]; National Science Foundation; Max Planck Institute,
Munich, Germany; Alexander von Humboldt Research Award; [1 P03B 04529]
FX supported by Chonnam National University, South Korea, in 2009; now at
Institute of Aviation, Warsaw, Poland; supported by the research grant
No. 1 P03B 04529 (2005-2008); This work was supported in part by the
Marie Curie Actions Transfer of Knowledge project COCOS (contract
MTKD-CT-2004-517186); now at DESY group FEB, Hamburg, Germany; also at
Moscow State University, Russia; now at University of Liverpool, United
Kingdom; on leave of absence at CERN, Geneva, Switzerland; now at CERN,
Geneva, Switzerland; also at Institute of Theoretical and Experimental
Physics, Moscow, Russia; also at INP, Cracow, Poland; also at FPACS,
AGH-UST, Cracow, Poland; partially supported by Warsaw University,
Poland; partially supported by Moscow State University, Russia; also
affiliated with DESY, Germany; now at Japan Synchrotron Radiation
Research Institute (JASRI), Hyogo, Japan; also at University of Tokyo,
Japan; now at Kobe University, Japan; supported by DESY, Germany;
partially supported by Russian Foundation for Basic Research grant No.
05-02-39028-NSFC-a; STFC Advanced Fellow; nee Korcsak-Gorzo; This
material was based on work supported by the National Science Foundation,
while working at the Foundation.; also at Max Planck Institute, Munich,
Germany, Alexander von Humboldt Research Award; now at Nihon Institute
of Medical Science, Japan; now at SunMelx Co. Ltd., Tokyo, Japan; now at
Osaka University, Osaka, Japan; now at University of Bonn, Germany; also
at Lodz University, Poland; member of Lodz University, Poland; now at
Lund University, Lund, Sweden; also at University of Podlasie, Siedlce,
Poland + deceased
NR 47
TC 2
Z9 2
U1 0
U2 7
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1029-8479
J9 J HIGH ENERGY PHYS
JI J. High Energy Phys.
PD MAY
PY 2010
IS 5
AR 085
DI 10.1007/JHEP05(2010)085
PG 36
WC Physics, Particles & Fields
SC Physics
GA 604AP
UT WOS:000278250000023
ER
PT J
AU Kachru, S
Simic, D
Trivedi, SP
AF Kachru, Shamit
Simic, Dusan
Trivedi, Sandip P.
TI Stable non-supersymmetric throats in string theory
SO JOURNAL OF HIGH ENERGY PHYSICS
LA English
DT Article
DE Technicolor and Composite Models; Gauge-gravity correspondence;
Compactification and String Models; Flux compactifications
ID CONFORMAL FIELD-THEORIES; CONSTRAINTS
AB We construct a large class of non-supersymmetric AdS-like throat geometries in string theory by taking non-supersymmetric orbifolds of supersymmetric backgrounds. The scale of SUSY breaking is the AdS radius, and the dual field theory has explicitly broken supersymmetry. The large hierarchy of energy scales in these geometries is stable. We establish this by showing that the dual gauge theories do not have any relevant operators which are singlets under the global symmetries. When the geometries are embedded in a compact internal space, a large enough discrete subgroup of the global symmetries can still survive to prevent any singlet relevant operators from arising. We illustrate this by embedding one case in a non-supersymmetric orbifold of a Calabi-Yau manifold. These examples can serve as a starting point for obtaining Randall-Sundrum models in string theory, and more generally for constructing composite Higgs or technicolor-like models where strongly coupled dynamics leads to the breaking of electro-weak symmetry. Towards the end of the paper, we briefly discuss how bulk gauge fields can be incorporated by introducing D7-branes in the bulk, and also show how the strongly coupled dynamics can lead to an emergent weakly coupled gauge theory in the IR with matter fields including scalars.
C1 [Kachru, Shamit; Simic, Dusan; Trivedi, Sandip P.] Stanford Univ, Stanford Inst Theoret Phys, Stanford, CA 94305 USA.
[Kachru, Shamit; Simic, Dusan; Trivedi, Sandip P.] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
[Kachru, Shamit; Simic, Dusan] Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA.
[Trivedi, Sandip P.] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India.
RP Kachru, S (reprint author), Stanford Univ, Stanford Inst Theoret Phys, Stanford, CA 94305 USA.
EM skachru@stanford.edu; simic@stanford.edu; trivedi.sp@gmail.com
NR 32
TC 13
Z9 13
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1029-8479
J9 J HIGH ENERGY PHYS
JI J. High Energy Phys.
PD MAY
PY 2010
IS 5
AR 067
DI 10.1007/JHEP05(2010)067
PG 29
WC Physics, Particles & Fields
SC Physics
GA 604AP
UT WOS:000278250000041
ER
PT J
AU Guan, Y
Ranoa, DRE
Jiang, S
Mutha, SK
Li, XY
Baudry, J
Tapping, RI
AF Guan, Yue
Ranoa, Diana Rose E.
Jiang, Song
Mutha, Santa K.
Li, Xinyan
Baudry, Jerome
Tapping, Richard I.
TI Human TLRs 10 and 1 Share Common Mechanisms of Innate Immune Sensing but
Not Signaling
SO JOURNAL OF IMMUNOLOGY
LA English
DT Article
ID TOLL-LIKE-RECEPTORS; NF-KAPPA-B; CRYSTAL-STRUCTURE; GENE FAMILY;
DIFFERENTIAL EXPRESSION; SELECTIVE EXPRESSION; DENDRITIC CELLS; CUTTING
EDGE; EVOLUTION; RESPONSES
AB TLRs are central receptors of the innate immune system that drive host inflammation and adaptive immune responses in response to invading microbes. Among human TLRs, TLR10 is the only family member without a defined agonist or function. Phylogenetic analysis reveals that TLR10 is most related to TLR1 and TLR6, both of which mediate immune responses to a variety of microbial and fungal components in cooperation with TLR2. The generation and analysis of chimeric receptors containing the extracellular recognition domain of TLR10 and the intracellular signaling domain of TLR1, revealed that TLR10 senses triacylated lipopeptides and a wide variety of other microbial-derived agonists shared by TLR1, but not TLR6. TLR10 requires TLR2 for innate immune recognition, and these receptors colocalize in the phagosome and physically interact in an agonist-dependent fashion. Computational modeling and mutational analysis of TLR10 showed preservation of the essential TLR2 dimer interface and lipopeptide-binding channel found in TLR1. Coimmunoprecipitation experiments indicate that, similar to TLR2/1, TLR2/10 complexes recruit the proximal adaptor MyD88 to the activated receptor complex. However, TLR10, alone or in cooperation with TLR2, fails to activate typical TLR-induced signaling, including NF-kappa B, IL-8, or IFN-beta-driven reporters. We conclude that human TLR10 cooperates with TLR2 in the sensing of microbes and fungi but possesses a signaling function distinct from that of other TLR2 subfamily members. The Journal of Immunology, 2010, 184: 5094-5103.
C1 [Guan, Yue; Ranoa, Diana Rose E.; Jiang, Song; Li, Xinyan; Tapping, Richard I.] Univ Illinois, Dept Microbiol, Urbana, IL 61801 USA.
[Mutha, Santa K.] Univ Illinois, Dept Biochem, Urbana, IL 61801 USA.
[Tapping, Richard I.] Univ Illinois, Coll Med, Urbana, IL 61801 USA.
[Baudry, Jerome] Oak Ridge Natl Lab, Ctr Biophys Mol, Oak Ridge, TN 37831 USA.
RP Tapping, RI (reprint author), Univ Illinois, Dept Microbiol, B103 CLSL MC110,601 S Goodwin Ave, Urbana, IL 61801 USA.
EM tapping@illinois.edu
OI Jiang, Song/0000-0003-4890-4327
FU National Institutes of Health, National Institute of Allergy and
Infectious Diseases [AI052344]
FX This work was supported by the National Institutes of Health, National
Institute of Allergy and Infectious Diseases Grant AI052344 (to R.I.T.).
NR 74
TC 115
Z9 118
U1 1
U2 10
PU AMER ASSOC IMMUNOLOGISTS
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA
SN 0022-1767
J9 J IMMUNOL
JI J. Immunol.
PD MAY 1
PY 2010
VL 184
IS 9
BP 5094
EP 5103
DI 10.4049/jimmunol.0901888
PG 10
WC Immunology
SC Immunology
GA 588SD
UT WOS:000277093000062
PM 20348427
ER
PT J
AU Adloff, C
Karyotakis, Y
Repond, J
Brandt, A
Brown, H
De, K
Medina, C
Smith, J
Li, J
Sosebee, M
White, A
Yu, J
Buanes, T
Eigen, G
Mikami, Y
Miller, O
Watson, NK
Wilson, JA
Goto, T
Mavromanolakis, G
Thomson, MA
Ward, DR
Yan, W
Benchekroun, D
Hoummada, A
Khoulaki, Y
Oreglia, M
Benyamna, M
Carloganu, C
Gay, P
Ha, J
Blazey, GC
Chakraborty, D
Dyshkant, A
Francis, K
Hedin, D
Lima, G
Zutshi, V
Babkin, VA
Bazylev, SN
Fedotov, YI
Slepnev, VM
Tiapkin, IA
Volgin, SV
Hostachy, JY
Morin, L
D'Ascenzo, N
Cornett, U
David, D
Fabbri, R
Falley, G
Feege, N
Gadow, K
Garutti, E
Gottlicher, P
Jung, T
Karstensen, S
Korbel, V
Lucaci-Timoce, AI
Lutz, B
Meyer, N
Morgunov, V
Reinecke, M
Schatzel, S
Schmidt, S
Sefkow, F
Smirnov, P
Vargas-Trevino, A
Wattimena, N
Wendt, O
Groll, M
Heuer, RD
Richter, S
Samson, J
Kaplan, A
Schultz-Coulon, HC
Shen, W
Tadday, A
Bilki, B
Norbeck, E
Onel, Y
Kim, EJ
Kim, G
Kim, DW
Lee, K
Lee, SC
Kawagoe, K
Tamura, Y
Ballin, JA
Dauncey, PD
Magnan, AM
Yilmaz, H
Zorba, O
Bartsch, V
Postranecky, M
Warren, M
Wing, M
Giannelli, MF
Green, MG
Salvatore, F
Kieffer, R
Laktineh, I
Fouz, MC
Bailey, DS
Barlow, RJ
Thompson, RJ
Batouritski, M
Dvornikov, O
Shulhevich, Y
Shumeiko, N
Solin, A
Starovoitov, P
Tchekhovski, V
Terletski, A
Bobchenko, B
Chadeeva, M
Danilov, M
Markin, O
Mizuk, R
Morgunov, V
Novikov, E
Rusinov, V
Tarkovsky, E
Andreev, V
Kirikova, N
Komar, A
Kozlov, V
Smirnov, P
Soloviev, Y
Terkulov, A
Buzhan, P
Dolgoshein, B
Ilyin, A
Kantserov, V
Kaplin, V
Karakash, A
Popova, E
Smirnov, S
Baranova, N
Boos, E
Gladilin, L
Karmanov, D
Korolev, M
Merkin, M
Savin, A
Voronin, A
Topkar, A
Frey, A
Kiesling, C
Lu, S
Prothmann, K
Seidel, K
Simon, F
Soldner, C
Weuste, L
Bouquet, B
Callier, S
Cornebise, P
Dulucq, F
Fleury, J
Li, H
Martin-Chassard, G
Richard, F
de La Taille, C
Poeschl, R
Raux, L
Ruan, M
Seguin-Moreau, N
Wicek, F
Anduze, M
Boudry, V
Brient, JC
Gaycken, G
Cornat, R
Jeans, D
de Freitas, PM
Musat, G
Reinhard, M
Rouge, A
Vanel, JC
Videau, H
Park, KH
Zacek, J
Cvach, J
Gallus, P
Havranek, M
Janata, M
Kvasnicka, J
Marcisovsky, M
Polak, I
Popule, J
Tomasek, L
Tomasek, M
Ruzicka, P
Sicho, P
Smolik, J
Vrba, V
Zalesak, J
Arestov, Y
Ammosov, V
Chuiko, B
Gapienko, V
Gilitski, Y
Koreshev, V
Semak, A
Sviridov, Y
Zaets, V
Belhorma, B
Belmir, M
Baird, A
Halsall, RN
Nam, SW
Park, IH
Yang, J
Chai, JS
Kim, JT
Kim, GB
Kim, Y
Kang, J
Kwon, YJ
Kim, I
Lee, T
Park, J
Sung, J
Itoh, S
Kotera, K
Nishiyama, M
Takeshita, T
Weber, S
Zeitnitz, C
AF Adloff, C.
Karyotakis, Y.
Repond, J.
Brandt, A.
Brown, H.
De, K.
Medina, C.
Smith, J.
Li, J.
Sosebee, M.
White, A.
Yu, J.
Buanes, T.
Eigen, G.
Mikami, Y.
Miller, O.
Watson, N. K.
Wilson, J. A.
Goto, T.
Mavromanolakis, G.
Thomson, M. A.
Ward, D. R.
Yan, W.
Benchekroun, D.
Hoummada, A.
Khoulaki, Y.
Oreglia, M.
Benyamna, M.
Carloganu, C.
Gay, P.
Ha, J.
Blazey, G. C.
Chakraborty, D.
Dyshkant, A.
Francis, K.
Hedin, D.
Lima, G.
Zutshi, V.
Babkin, V. A.
Bazylev, S. N.
Fedotov, Yu. I.
Slepnev, V. M.
Tiapkin, I. A.
Volgin, S. V.
Hostachy, J. -Y.
Morin, L.
D'Ascenzo, N.
Cornett, U.
David, D.
Fabbri, R.
Falley, G.
Feege, N.
Gadow, K.
Garutti, E.
Goettlicher, P.
Jung, T.
Karstensen, S.
Korbel, V.
Lucaci-Timoce, A. -I.
Lutz, B.
Meyer, N.
Morgunov, V.
Reinecke, M.
Schaetzel, S.
Schmidt, S.
Sefkow, F.
Smirnov, P.
Vargas-Trevino, A.
Wattimena, N.
Wendt, O.
Groll, M.
Heuer, R. -D.
Richter, S.
Samson, J.
Kaplan, A.
Schultz-Coulon, H. -Ch.
Shen, W.
Tadday, A.
Bilki, B.
Norbeck, E.
Onel, Y.
Kim, E. J.
Kim, G.
Kim, D-W.
Lee, K.
Lee, S. C.
Kawagoe, K.
Tamura, Y.
Ballin, J. A.
Dauncey, P. D.
Magnan, A. -M.
Yilmaz, H.
Zorba, O.
Bartsch, V.
Postranecky, M.
Warren, M.
Wing, M.
Giannelli, M. Faucci
Green, M. G.
Salvatore, F.
Kieffer, R.
Laktineh, I.
Fouz, M. C.
Bailey, D. S.
Barlow, R. J.
Thompson, R. J.
Batouritski, M.
Dvornikov, O.
Shulhevich, Yu.
Shumeiko, N.
Solin, A.
Starovoitov, P.
Tchekhovski, V.
Terletski, A.
Bobchenko, B.
Chadeeva, M.
Danilov, M.
Markin, O.
Mizuk, R.
Morgunov, V.
Novikov, E.
Rusinov, V.
Tarkovsky, E.
Andreev, V.
Kirikova, N.
Komar, A.
Kozlov, V.
Smirnov, P.
Soloviev, Y.
Terkulov, A.
Buzhan, P.
Dolgoshein, B.
Ilyin, A.
Kantserov, V.
Kaplin, V.
Karakash, A.
Popova, E.
Smirnov, S.
Baranova, N.
Boos, E.
Gladilin, L.
Karmanov, D.
Korolev, M.
Merkin, M.
Savin, A.
Voronin, A.
Topkar, A.
Frey, A.
Kiesling, C.
Lu, S.
Prothmann, K.
Seidel, K.
Simon, F.
Soldner, C.
Weuste, L.
Bouquet, B.
Callier, S.
Cornebise, P.
Dulucq, F.
Fleury, J.
Li, H.
Martin-Chassard, G.
Richard, F.
de la Taille, Ch.
Poeschl, R.
Raux, L.
Ruan, M.
Seguin-Moreau, N.
Wicek, F.
Anduze, M.
Boudry, V.
Brient, J-C.
Gaycken, G.
Cornat, R.
Jeans, D.
de Freitas, P. Mora
Musat, G.
Reinhard, M.
Rouge, A.
Vanel, J-Ch.
Videau, H.
Park, K-H.
Zacek, J.
Cvach, J.
Gallus, P.
Havranek, M.
Janata, M.
Kvasnicka, J.
Marcisovsky, M.
Polak, I.
Popule, J.
Tomasek, L.
Tomasek, M.
Ruzicka, P.
Sicho, P.
Smolik, J.
Vrba, V.
Zalesak, J.
Arestov, Yu.
Ammosov, V.
Chuiko, B.
Gapienko, V.
Gilitski, Y.
Koreshev, V.
Semak, A.
Sviridov, Yu.
Zaets, V.
Belhorma, B.
Belmir, M.
Baird, A.
Halsall, R. N.
Nam, S. W.
Park, I. H.
Yang, J.
Chai, J. -S.
Kim, J. -T.
Kim, G. -B.
Kim, Y.
Kang, J.
Kwon, Y. -J.
Kim, I.
Lee, T.
Park, J.
Sung, J.
Itoh, S.
Kotera, K.
Nishiyama, M.
Takeshita, T.
Weber, S.
Zeitnitz, C.
TI Construction and commissioning of the CALICE analog hadron calorimeter
prototype
SO JOURNAL OF INSTRUMENTATION
LA English
DT Article
DE Scintillators, scintillation and light emission processes (solid, gas
and liquid scintillators); Photon detectors for UV, visible and IR
photons (solid-state) (PIN diodes, APDs, Si-PMTs, CCDs, EBCCDs etc);
Calorimeters; Calorimeter methods
ID DETECTOR
AB An analog hadron calorimeter (AHCAL) prototype of 5.3 nuclear interaction lengths thickness has been constructed by members of the CALICE Collaboration. The AHCAL prototype consists of a 38-layer sandwich structure of steel plates and highly-segmented scintillator tiles that are read out by wavelength-shifting fibers coupled to SiPMs. The signal is amplified and shaped with a custom-designed ASIC. A calibration/monitoring system based on LED light was developed to monitor the SiPM gain and to measure the full SiPM response curve in order to correct for non-linearity. Ultimately, the physics goals are the study of hadron shower shapes and testing the concept of particle flow. The technical goal consists of measuring the performance and reliability of 7608 SiPMs. The AHCAL was commissioned in test beams at DESY and CERN. The entire prototype was completed in 2007 and recorded hadron showers, electron showers and muons at different energies and incident angles in test beams at CERN and Fermilab.
C1 [Buanes, T.; Eigen, G.] Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
[Adloff, C.; Karyotakis, Y.] Univ Savoie, CNRS IN2P3, Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France.
[Repond, J.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Brandt, A.; Brown, H.; De, K.; Medina, C.; Smith, J.; Li, J.; Sosebee, M.; White, A.; Yu, J.] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA.
[Mikami, Y.; Miller, O.; Watson, N. K.; Wilson, J. A.] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England.
[Goto, T.; Mavromanolakis, G.; Thomson, M. A.; Ward, D. R.; Yan, W.] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England.
[Benchekroun, D.; Hoummada, A.; Khoulaki, Y.] Univ Hassan II Ain Chock, Fac Sci, Casablanca, Morocco.
[Oreglia, M.] Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
[Benyamna, M.; Carloganu, C.; Gay, P.] Lab Phys Corpusculaire Clermont Ferrand LPC, F-63177 Aubiere, France.
[Ha, J.] Korea Atom Energy Res Inst, Taejon 305600, South Korea.
[Blazey, G. C.; Chakraborty, D.; Dyshkant, A.; Francis, K.; Hedin, D.; Lima, G.; Zutshi, V.] No Illinois Univ, Dept Phys, NICADD, De Kalb, IL 60115 USA.
[Babkin, V. A.; Bazylev, S. N.; Fedotov, Yu. I.; Slepnev, V. M.; Tiapkin, I. A.; Volgin, S. V.] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia.
[Hostachy, J. -Y.; Morin, L.] Univ Grenoble 1, Lab Phys Subatom & Cosmol, CNRS IN2P3, Inst Polytech Grenoble, F-38026 Grenoble, France.
[D'Ascenzo, N.; Cornett, U.; David, D.; Fabbri, R.; Falley, G.; Feege, N.; Gadow, K.; Garutti, E.; Goettlicher, P.; Jung, T.; Karstensen, S.; Korbel, V.; Lucaci-Timoce, A. -I.; Lutz, B.; Meyer, N.; Morgunov, V.; Reinecke, M.; Schaetzel, S.; Schmidt, S.; Sefkow, F.; Smirnov, P.; Vargas-Trevino, A.; Wattimena, N.; Wendt, O.] DESY, D-22603 Hamburg, Germany.
[Groll, M.; Heuer, R. -D.; Richter, S.; Samson, J.] Univ Hamburg, Dept Phys, Inst Expt Phys, D-22761 Hamburg, Germany.
[Kaplan, A.; Schultz-Coulon, H. -Ch.; Shen, W.; Tadday, A.] Univ Heidelberg, Fak Phys & Astron, D-69120 Heidelberg, Germany.
[Bilki, B.; Norbeck, E.; Onel, Y.] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA.
[Kim, E. J.; Kim, G.] Chonbuk Natl Univ, Jeonju 561756, South Korea.
[Kim, D-W.; Lee, K.; Lee, S. C.] Kangnung Natl Univ, HEP PD, Kangnung, South Korea.
[Kawagoe, K.; Tamura, Y.] Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan.
[Ballin, J. A.; Dauncey, P. D.; Magnan, A. -M.; Yilmaz, H.; Zorba, O.] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Dept Phys, London SW7 2AZ, England.
[Bartsch, V.; Postranecky, M.; Warren, M.; Wing, M.] UCL, Dept Phys & Astron, London WC1E 6BT, England.
[Giannelli, M. Faucci; Green, M. G.; Salvatore, F.] Royal Holloway Univ London, Dept Phys, Egham TW20 0EX, Surrey, England.
[Kieffer, R.; Laktineh, I.] Univ Lyon, F-69622 Villeurbanne, France.
[Kieffer, R.; Laktineh, I.] Univ Lyon 1, F-69622 Villeurbanne, France.
[Kieffer, R.; Laktineh, I.] Inst Phys Nucl, CNRS IN2P3, Lyon, France.
[Fouz, M. C.] Ctr Invest Energet Medioambientales & Tecnol, CIEMAT, Madrid, Spain.
[Bailey, D. S.; Barlow, R. J.; Thompson, R. J.] Univ Manchester, Sch Phys & Astron, Schuster Lab, Manchester M13 9PL, Lancs, England.
[Batouritski, M.; Dvornikov, O.; Shulhevich, Yu.; Shumeiko, N.; Solin, A.; Starovoitov, P.; Tchekhovski, V.; Terletski, A.] Belarusian State Univ, Natl Ctr Particle & High Energy Phys, Minsk 220040, Byelarus.
[Bobchenko, B.; Chadeeva, M.; Danilov, M.; Markin, O.; Mizuk, R.; Morgunov, V.; Novikov, E.; Rusinov, V.; Tarkovsky, E.] Inst Theoret & Expt Phys, RU-117218 Moscow, Russia.
[Andreev, V.; Kirikova, N.; Komar, A.; Kozlov, V.; Smirnov, P.; Soloviev, Y.; Terkulov, A.] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 117924, Russia.
[Buzhan, P.; Dolgoshein, B.; Ilyin, A.; Kantserov, V.; Kaplin, V.; Karakash, A.; Popova, E.; Smirnov, S.] Moscow Engn Phys Inst, MEPhI, Dept Phys, Moscow 115409, Russia.
[Baranova, N.; Boos, E.; Gladilin, L.; Karmanov, D.; Korolev, M.; Merkin, M.; Savin, A.; Voronin, A.] Moscow MV Lomonosov State Univ, DV Skobeltsyn Inst Nucl Phys SINP MSU, Moscow 119991, Russia.
[Topkar, A.] Bhabha Atom Res Ctr, Mumbai 400085, Maharashtra, India.
[Frey, A.; Kiesling, C.; Lu, S.; Prothmann, K.; Seidel, K.; Simon, F.; Soldner, C.; Weuste, L.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
[Bouquet, B.; Callier, S.; Cornebise, P.; Dulucq, F.; Fleury, J.; Li, H.; Martin-Chassard, G.; Richard, F.; de la Taille, Ch.; Poeschl, R.; Raux, L.; Ruan, M.; Seguin-Moreau, N.; Wicek, F.] Univ Paris 11, Ctr Orsay, Lab Accelerateur Lineaire, F-91898 Orsay, France.
[Anduze, M.; Boudry, V.; Brient, J-C.; Gaycken, G.; Cornat, R.; Jeans, D.; de Freitas, P. Mora; Musat, G.; Reinhard, M.; Rouge, A.; Vanel, J-Ch.; Videau, H.] Ecole Polytech, Lab Leprince Ringuet LLR, F-91128 Palaiseau, France.
[Park, K-H.] Pohang Accelerator Lab, Pohang 790784, South Korea.
[Zacek, J.] Charles Univ Prague, Inst Particle & Nucl Phys, CZ-18000 Prague 8, Czech Republic.
[Cvach, J.; Gallus, P.; Havranek, M.; Janata, M.; Kvasnicka, J.; Marcisovsky, M.; Polak, I.; Popule, J.; Tomasek, L.; Tomasek, M.; Ruzicka, P.; Sicho, P.; Smolik, J.; Vrba, V.; Zalesak, J.] Acad Sci Czech Republic, Inst Phys, CZ-18221 Prague 8, Czech Republic.
[Arestov, Yu.; Ammosov, V.; Chuiko, B.; Gapienko, V.; Gilitski, Y.; Koreshev, V.; Semak, A.; Sviridov, Yu.; Zaets, V.] Inst High Energy Phys, RU-142284 Protvino, Moscow Region, Russia.
[Belhorma, B.; Belmir, M.] Ctr Natl Energie Sci & Tech Nucl, Rabat 10001, Morocco.
[Baird, A.; Halsall, R. N.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Nam, S. W.; Park, I. H.; Yang, J.] Ewha Womans Univ, Dept Phys, Seoul 120, South Korea.
[Chai, J. -S.; Kim, J. -T.; Kim, G. -B.] Sungkyunkwan Univ, Suwon 440746, Gyeonggi Do, South Korea.
[Kim, Y.] Korea Inst Radiol & Med Sci, Seoul 139706, South Korea.
[Kang, J.; Kwon, Y. -J.] Yonsei Univ, Dept Phys, Seoul 120749, South Korea.
[Kim, I.; Lee, T.; Park, J.; Sung, J.] Seoul Natl Univ, Sch Elect Engn & Comp Sci, Seoul 151742, South Korea.
[Itoh, S.; Kotera, K.; Nishiyama, M.; Takeshita, T.] Shinshu Univ, Dept Phys, Matsumoto, Nagano 390861, Japan.
[Weber, S.; Zeitnitz, C.] Berg Univ Wuppertal, D-42097 Wuppertal, Germany.
RP Eigen, G (reprint author), Univ Bergen, Inst Phys, Allegaten 55, N-5007 Bergen, Norway.
EM gerald.eigen@ift.uib.no
RI Terkulov, Adel/M-8581-2015; Kirikova, Nataliia/N-1710-2015; Danilov,
Mikhail/C-5380-2014; Mizuk, Roman/B-3751-2014; Chadeeva,
Marina/C-8789-2016; De, Kaushik/N-1953-2013; Cvach,
Jaroslav/G-6269-2014; Smolik, Jan/H-1479-2014; Marcisovsky,
Michal/H-1533-2014; Zalesak, Jaroslav/G-5691-2014; Tomasek,
Lukas/G-6370-2014; Kozlov, Valentin/M-8000-2015; Soloviev,
Yury/M-8788-2015; Andreev, Vladimir/M-8665-2015; Merkin,
Mikhail/D-6809-2012; Smirnov, Sergei/F-1014-2011; Gladilin,
Leonid/B-5226-2011; Dvornikov, Oleg/I-7207-2013
OI Danilov, Mikhail/0000-0001-9227-5164; Chadeeva,
Marina/0000-0003-1814-1218; Hedin, David/0000-0001-9984-215X; Thomson,
Mark/0000-0002-2654-9005; Blazey, Gerald/0000-0002-7435-5758; Babkin,
Vadim/0000-0001-5378-4919; Bilki, Burak/0000-0001-9515-3306; Watson,
Nigel/0000-0002-8142-4678; De, Kaushik/0000-0002-5647-4489; Zalesak,
Jaroslav/0000-0002-4519-4705; Tomasek, Lukas/0000-0002-5224-1936;
Soloviev, Yury/0000-0003-1136-2827; Smirnov, Sergei/0000-0002-6778-073X;
Gladilin, Leonid/0000-0001-9422-8636;
FU DESY; CERN; FNAL; University of Tsukuba; Bundesministerium fur Bildung
und Forschung, Germany; DFG of Germany; Helmholtz-Nachwuchsgruppen
[VH-NG-206]; BMBF [05HS6VH1]; Alexander von Humboldt Foundation
[RUS1066839 GSA]; Helmholtz Foundation [HRJRG-002]; RFBR
[SS-1329.2008.2, RFBR08-02-12100-OFI]; Russian Agency for Atomic Energy;
ISTC [3090]; Norwegian Research Council; Russian Ministry of Education
and Science [02.740.11.0239]; CICYT, Spain; CRI(MST) of MOST/KOSEF in
Korea; US Department of Energy; US National Science Foundation; Ministry
of Education, Youth and Sports of the Czech Republic [AV0 Z3407391, AV0
Z10100502, LC527]; Grant Agency of the Czech Republic [202/05/0653];
Science and Technology Facilities Council, UK
FX We would like to thank the technicians and the engineers who contributed
to the design and construction of the prototypes, in particular P.
Smirnov. We express our gratitude to the DESY, CERN and FNAL
laboratories for hosting our test beam experiments, and to their staff
for the efficient accelerator operation and excellent support. We would
like to thank the HEP group of the University of Tsukuba for the loan of
drift chambers for the DESY test beam. The authors would like to thank
the RIMST (Zelenograd) group for their help and sensors manufacturing.
This work was supported by the Bundesministerium fur Bildung und
Forschung, Germany; by the DFG cluster of excellence 'Origin and
Structure of the Universe' of Germany; by the Helmholtz-Nachwuchsgruppen
grant VH-NG-206; by the BMBF, grant no. 05HS6VH1; by the Alexander von
Humboldt Foundation (Research Award IV, RUS1066839 GSA); by joint
Helmholtz Foundation and RFBR grant HRJRG-002, Russian Agency for Atomic
Energy, ISTC grant 3090; by the Norwegian Research Council; by joint
Helmholtz Foundation and RFBR grant HRJRG-002, SC Rosatom; by Russian
Grants SS-1329.2008.2 and RFBR08-02-12100-OFI and by the Russian
Ministry of Education and Science contract 02.740.11.0239; by CICYT,
Spain; by CRI(MST) of MOST/KOSEF in Korea; by the US Department of
Energy and the US National Science Foundation; by the Ministry of
Education, Youth and Sports of the Czech Republic under the projects AV0
Z3407391, AV0 Z10100502, LC527 and by the Grant Agency of the Czech
Republic under the project 202/05/0653; and by the Science and
Technology Facilities Council, UK.
NR 26
TC 56
Z9 56
U1 2
U2 20
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 1748-0221
J9 J INSTRUM
JI J. Instrum.
PD MAY
PY 2010
VL 5
AR P05004
DI 10.1088/1748-0221/5/05/P05004
PG 37
WC Instruments & Instrumentation
SC Instruments & Instrumentation
GA 633SS
UT WOS:000280526100005
ER
PT J
AU Adloff, C
Karyotakis, Y
Repond, J
Yu, J
Eigen, G
Mikami, Y
Watson, NK
Wilson, JA
Goto, T
Mavromanolakis, G
Thomson, MA
Ward, DR
Yan, W
Benchekroun, D
Hoummada, A
Khoulaki, Y
Apostolakis, J
Ribon, A
Uzhinskiy, V
Benyamna, M
Carloganu, C
Fehr, F
Gay, P
Blazey, GC
Chakraborty, D
Dyshkant, A
Francis, K
Hedin, D
Lima, JG
Zutshi, V
Hostachy, JY
Krastev, K
Morin, L
D'Ascenzo, N
Cornett, U
David, D
Fabbri, R
Falley, G
Gadow, K
Garutti, E
Gottlicher, P
Jung, T
Karstensen, S
Lucaci-Timoce, AI
Lutz, B
Meyer, N
Morgunov, V
Reinecke, M
Sefkow, F
Smirnov, P
Vargas-Trevino, A
Wattimena, N
Wendt, O
Feege, N
Groll, M
Haller, J
Heuer, RD
Morozov, S
Richter, S
Samson, J
Kaplan, A
Schultz-Coulon, HC
Shen, W
Tadday, A
Bilki, B
Norbeck, E
Onel, Y
Kim, EJ
Kim, G
Kim, DW
Lee, K
Lee, SC
Kawagoe, K
Tamura, Y
Dauncey, PD
Magnan, AM
Yilmaz, H
Zorba, O
Bartsch, V
Postranecky, M
Warren, M
Wing, M
Green, MG
Salvatore, F
Bedjidian, M
Kieffer, R
Laktineh, I
Fouz, MC
Bailey, DS
Barlow, RJ
Kelly, M
Thompson, RJ
Danilov, M
Tarkovsky, E
Baranova, N
Karmanov, D
Korolev, M
Merkin, M
Voronin, A
Frey, A
Lu, S
Seidel, K
Simon, F
Soldner, C
Weuste, L
Bonis, J
Bouquet, B
Callier, S
Cornebise, P
Doublet, P
Giannelli, MF
Fleury, J
Li, H
Martin-Chassard, G
Richard, F
de la Taille, C
Poeschl, R
Raux, L
Seguin-Moreau, N
Wicek, F
Anduze, M
Boudry, V
Brient, JC
Gaycken, G
Jeans, D
de Freitas, PM
Musat, G
Reinhard, M
Rouge, A
Ruan, M
Vanel, JC
Videau, H
Park, KH
Zacek, J
Cvach, J
Gallus, P
Havranek, M
Janata, M
Marcisovsky, M
Polak, I
Popule, J
Tomasek, L
Tomasek, M
Ruzicka, P
Sicho, P
Smolik, J
Vrba, V
Zalesak, J
Belhorma, B
Belmir, M
Nam, SW
Park, IH
Yang, J
Chai, JS
Kim, JT
Kim, GB
Kang, J
Kwon, YJ
AF Adloff, C.
Karyotakis, Y.
Repond, J.
Yu, J.
Eigen, G.
Mikami, Y.
Watson, N. K.
Wilson, J. A.
Goto, T.
Mavromanolakis, G.
Thomson, M. A.
Ward, D. R.
Yan, W.
Benchekroun, D.
Hoummada, A.
Khoulaki, Y.
Apostolakis, J.
Ribon, A.
Uzhinskiy, V.
Benyamna, M.
Carloganu, C.
Fehr, F.
Gay, P.
Blazey, G. C.
Chakraborty, D.
Dyshkant, A.
Francis, K.
Hedin, D.
Lima, J. G.
Zutshi, V.
Hostachy, J. -Y.
Krastev, K.
Morin, L.
D'Ascenzo, N.
Cornett, U.
David, D.
Fabbri, R.
Falley, G.
Gadow, K.
Garutti, E.
Goettlicher, P.
Jung, T.
Karstensen, S.
Lucaci-Timoce, A. -I.
Lutz, B.
Meyer, N.
Morgunov, V.
Reinecke, M.
Sefkow, F.
Smirnov, P.
Vargas-Trevino, A.
Wattimena, N.
Wendt, O.
Feege, N.
Groll, M.
Haller, J.
Heuer, R. -D.
Morozov, S.
Richter, S.
Samson, J.
Kaplan, A.
Schultz-Coulon, H. -Ch.
Shen, W.
Tadday, A.
Bilki, B.
Norbeck, E.
Onel, Y.
Kim, E. J.
Kim, G.
Kim, D-W.
Lee, K.
Lee, S. C.
Kawagoe, K.
Tamura, Y.
Dauncey, P. D.
Magnan, A. -M.
Yilmaz, H.
Zorba, O.
Bartsch, V.
Postranecky, M.
Warren, M.
Wing, M.
Green, M. G.
Salvatore, F.
Bedjidian, M.
Kieffer, R.
Laktineh, I.
Fouz, M. -C.
Bailey, D. S.
Barlow, R. J.
Kelly, M.
Thompson, R. J.
Danilov, M.
Tarkovsky, E.
Baranova, N.
Karmanov, D.
Korolev, M.
Merkin, M.
Voronin, A.
Frey, A.
Lu, S.
Seidel, K.
Simon, F.
Soldner, C.
Weuste, L.
Bonis, J.
Bouquet, B.
Callier, S.
Cornebise, P.
Doublet, Ph.
Giannelli, M. Faucci
Fleury, J.
Li, H.
Martin-Chassard, G.
Richard, F.
de la Taille, Ch.
Poeschl, R.
Raux, L.
Seguin-Moreau, N.
Wicek, F.
Anduze, M.
Boudry, V.
Brient, J. -C.
Gaycken, G.
Jeans, D.
de Freitas, P. Mora
Musat, G.
Reinhard, M.
Rouge, A.
Ruan, M.
Vanel, J-Ch.
Videau, H.
Park, K-H
Zacek, J.
Cvach, J.
Gallus, P.
Havranek, M.
Janata, M.
Marcisovsky, M.
Polak, I.
Popule, J.
Tomasek, L.
Tomasek, M.
Ruzicka, P.
Sicho, P.
Smolik, J.
Vrba, V.
Zalesak, J.
Belhorma, B.
Belmir, M.
Nam, S. W.
Park, I. H.
Yang, J.
Chai, J. -S.
Kim, J. -T.
Kim, G. -B.
Kang, J.
Kwon, Y. -J.
CA Calice Collaboration
TI Study of the interactions of pions in the CALICE silicon-tungsten
calorimeter prototype
SO JOURNAL OF INSTRUMENTATION
LA English
DT Article
DE Calorimeters; Calorimeter methods; Detector modelling and simulations I
(interaction of radiation with matter, interaction of photons with
matter, interaction of hadrons with matter, etc)
ID SPACE EVENT GENERATOR; HEAVY-ION COLLISIONS; TRANSVERSE FLOW; CAPTURE;
NUCLEI; REST
AB A prototype silicon-tungsten electromagnetic calorimeter for an ILC detector was tested in 2007 at the CERN SPS test beam. Data were collected with electron and hadron beams in the energy range 8 to 80 GeV. The analysis described here focuses on the interactions of pions in the calorimeter. One of the main objectives of the CALICE program is to validate the Monte Carlo tools available for the design of a full-sized detector. The interactions of pions in the Si-W calorimeter are therefore confronted with the predictions of various physical models implemented in the GEANT4 simulation framework.
C1 [Repond, J.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Yu, J.] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA.
[Eigen, G.] Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
[Mikami, Y.; Watson, N. K.; Wilson, J. A.] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England.
[Goto, T.; Mavromanolakis, G.; Thomson, M. A.; Ward, D. R.; Yan, W.; Frey, A.] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England.
[Benchekroun, D.; Hoummada, A.; Khoulaki, Y.] Univ Hassan II Ain Chock, Fac Sci, Casablanca, Morocco.
[Apostolakis, J.; Ribon, A.; Uzhinskiy, V.] CERN, CH-1211 Geneva 23, Switzerland.
[Benyamna, M.; Carloganu, C.; Gay, P.; Frey, A.] Univ Clermont Ferrand, CNRS IN2P3, Lab Phys Corpusculaire Clermont Ferrand LPC, F-63177 Aubiere, France.
[Blazey, G. C.; Chakraborty, D.; Dyshkant, A.; Francis, K.; Hedin, D.; Lima, J. G.; Zutshi, V.] No Illinois Univ, NICADD, Dept Phys, De Kalb, IL 60155 USA.
[Hostachy, J. -Y.; Krastev, K.; Morin, L.] Univ Grenoble 1, Lab Phys Subatom & Cosmol, CNRS IN2P3, Inst Polytech, F-38026 Grenoble, France.
[D'Ascenzo, N.; Cornett, U.; David, D.; Fabbri, R.; Falley, G.; Gadow, K.; Garutti, E.; Goettlicher, P.; Karstensen, S.; Lucaci-Timoce, A. -I.; Lutz, B.; Meyer, N.; Morgunov, V.; Reinecke, M.; Sefkow, F.; Smirnov, P.; Vargas-Trevino, A.; Wattimena, N.; Wendt, O.] DESY, D-22603 Hamburg, Germany.
[Feege, N.; Groll, M.; Haller, J.; Heuer, R. -D.; Morozov, S.; Richter, S.; Samson, J.] Univ Hamburg, Dept Phys, Inst Expt Phys, D-22761 Hamburg, Germany.
[Kaplan, A.; Schultz-Coulon, H. -Ch.; Shen, W.; Tadday, A.] Univ Heidelberg, Fak Phys & Astron, D-69120 Heidelberg, Germany.
[Bilki, B.; Norbeck, E.; Onel, Y.] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA.
[Kim, E. J.] Chonbuk Natl Univ, Jeonju 561756, South Korea.
[Kim, G.; Kim, D-W.; Lee, K.; Lee, S. C.] Kangnung Natl Univ, HEP PD, Kangnung, South Korea.
[Kawagoe, K.; Tamura, Y.] Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan.
[Dauncey, P. D.; Magnan, A. -M.; Yilmaz, H.; Zorba, O.] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Dept Phys, London SW7 2AZ, England.
[Bartsch, V.; Postranecky, M.; Warren, M.; Wing, M.] UCL, Dept Phys & Astron, London WC1E 6BT, England.
[Green, M. G.; Salvatore, F.] Univ London Royal Holloway & Bedford New Coll, Dept Phys, Egham TW20 0EX, Surrey, England.
[Bedjidian, M.; Kieffer, R.; Laktineh, I.] Univ Lyon, F-69622 Lyon, France.
[Bedjidian, M.; Kieffer, R.; Laktineh, I.] Univ Lyon 1, Villeurbanne, France.
[Bedjidian, M.; Kieffer, R.; Laktineh, I.] Inst Phys Nucl, CNRS IN2P3, Lyon, France.
[Fouz, M. -C.] CIEMAT, Ctr Invest Energet Medioambientales & Tecnol, E-28040 Madrid, Spain.
[Bailey, D. S.; Barlow, R. J.; Kelly, M.; Thompson, R. J.] Univ Manchester, Sch Phys & Astron, Schuster Lab, Manchester M13 9PL, Lancs, England.
[Danilov, M.; Tarkovsky, E.] Inst Theoret & Expt Phys, RU-117218 Moscow, Russia.
[Baranova, N.; Karmanov, D.; Korolev, M.; Merkin, M.; Voronin, A.] Moscow MV Lomonosov State Univ, DV Skobeltsyn Inst Nucl Phys SINP MSU, Moscow 119991, Russia.
[Frey, A.; Lu, S.; Seidel, K.; Simon, F.; Soldner, C.; Weuste, L.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
[Bonis, J.; Bouquet, B.; Callier, S.; Cornebise, P.; Doublet, Ph.; Giannelli, M. Faucci; Fleury, J.; Li, H.; Martin-Chassard, G.; Richard, F.; de la Taille, Ch.; Poeschl, R.; Raux, L.; Seguin-Moreau, N.; Wicek, F.] Univ Paris 11, Ctr Orsay, Accelerateur Lineaire Lab, F-91898 Orsay, France.
[Anduze, M.; Boudry, V.; Brient, J. -C.; Gaycken, G.; Jeans, D.; de Freitas, P. Mora; Musat, G.; Reinhard, M.; Rouge, A.; Ruan, M.; Vanel, J-Ch.; Videau, H.] Ecole Polytech, CNRS IN2P3, LLR, F-91128 Palaiseau, France.
[Park, K-H] Pohang Accelerator Lab, Pohang 790784, South Korea.
[Zalesak, J.] Charles Univ Prague, Inst Particle & Nucl Phys, CZ-18000 Prague 8, Czech Republic.
[Cvach, J.; Gallus, P.; Havranek, M.; Janata, M.; Marcisovsky, M.; Polak, I.; Popule, J.; Tomasek, L.; Tomasek, M.; Ruzicka, P.; Sicho, P.; Smolik, J.; Vrba, V.; Zalesak, J.] Acad Sci Czech Republic, Inst Phys, Prague 6, Czech Republic.
[Belhorma, B.; Belmir, M.] Ctr Natl Energie Sci & Techn Nucl, Rabat, Morocco.
[Nam, S. W.; Park, I. H.; Yang, J.] Ewha Womans Univ, Dept Phys, Seoul 120, South Korea.
[Chai, J. -S.; Kim, J. -T.; Kim, G. -B.] Sungkyunkwan Univ, Suwon 440746, South Korea.
[Kang, J.; Kwon, Y. -J.] Yonsei Univ, Dept Phys, Seoul 120749, South Korea.
[Adloff, C.; Karyotakis, Y.] Univ Savoie, CNRS IN2P3, Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France.
RP Ward, DR (reprint author), Univ Savoie, CNRS IN2P3, Lab Annecy Le Vieux Phys Particules, 9 Chemin Bellevue BP110, F-74941 Annecy Le Vieux, France.
EM drw1@cam.ac.uk
RI Merkin, Mikhail/D-6809-2012; Cvach, Jaroslav/G-6269-2014; Smolik,
Jan/H-1479-2014; Marcisovsky, Michal/H-1533-2014; Zalesak,
Jaroslav/G-5691-2014; Tomasek, Lukas/G-6370-2014; Danilov,
Mikhail/C-5380-2014;
OI Watson, Nigel/0000-0002-8142-4678; Zalesak,
Jaroslav/0000-0002-4519-4705; Tomasek, Lukas/0000-0002-5224-1936;
Danilov, Mikhail/0000-0001-9227-5164; Hedin, David/0000-0001-9984-215X;
Blazey, Gerald/0000-0002-7435-5758; Bilki, Burak/0000-0001-9515-3306
FU DESY; CERN; University of Tsukuba; Bundesministerium fur Bildung und
Forschung, Germany; DFG cluster of excellence;
Helmholtz-Nachwuchsgruppen [VH-NG-206]; BMBF [05HS6VH1, 05HS6GU1];
Alexander von Humboldt Foundation [RUS1066839 GSA]; Helmholtz Foundation
[HRJRG-002]; RFBR [SS-1329.2008.2, RFBR0402/17307a]; Russian Agency for
Atomic Energy; ISTC [3090]; Russian Ministry of Education and Science;
CICYT, Spain; CRI(MST) of MOST/KOSEF in Korea; US Department of Energy;
US National Science Foundation; Ministry of Education, Youth and Sports
of the Czech Republic [AV0 Z3407391, AV0 Z10100502, LC527, LA09042];
Grant Agency of the Czech Republic [202/05/0653]; Science and Technology
Facilities Council, UK
FX We would like to thank the technicians and the engineers who contributed
to the design and construction of the prototypes. We also gratefully
acknowledge the DESY and CERN managements for their support and
hospitality, and their accelerator staff for the reliable and efficient
beam operation. We would like to thank the HEP group of the University
of Tsukuba for the loan of drift chambers for the DESY test-beam. The
authors would like to thank the RIMST (Zelenograd) group for their help
and sensors manufacturing. This work was supported by the
Bundesministerium fur Bildung und Forschung, Germany; by the DFG cluster
of excellence "Origin and Structure of the Universe"; by the
Helmholtz-Nachwuchsgruppen grant VH-NG-206; by the BMBF, grant numbers
05HS6VH1 and 05HS6GU1; by the Alexander von Humboldt Foundation
(Research Award IV, RUS1066839 GSA); by joint Helmholtz Foundation and
RFBR grant HRJRG-002, Russian Agency for Atomic Energy, ISTC grant 3090;
by Russian Grants SS-1329.2008.2 and RFBR0402/17307a and by the Russian
Ministry of Education and Science; by CICYT, Spain; by CRI(MST) of
MOST/KOSEF in Korea; by the US Department of Energy and the US National
Science Foundation; by the Ministry of Education, Youth and Sports of
the Czech Republic under the projects AV0 Z3407391, AV0 Z10100502,
LC527, LA09042 and by the Grant Agency of the Czech Republic under the
project 202/05/0653; and by the Science and Technology Facilities
Council, UK.
NR 24
TC 13
Z9 13
U1 1
U2 11
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1748-0221
J9 J INSTRUM
JI J. Instrum.
PD MAY
PY 2010
VL 5
AR P05007
DI 10.1088/1748-0221/5/05/P05007
PG 24
WC Instruments & Instrumentation
SC Instruments & Instrumentation
GA 633SS
UT WOS:000280526100002
ER
PT J
AU Weber, TJ
Shankaran, H
Wiley, HS
Opresko, LK
Chrisler, WB
Quesenberry, RD
AF Weber, Thomas J.
Shankaran, Harish
Wiley, H. Steven
Opresko, Lee K.
Chrisler, William B.
Quesenberry, Ryan D.
TI Basic Fibroblast Growth Factor Regulates Persistent ERK Oscillations in
Premalignant but Not Malignant JB6 Cells
SO JOURNAL OF INVESTIGATIVE DERMATOLOGY
LA English
DT Article
ID HUMAN TUMOR-CELLS; EXTRACELLULAR-MATRIX; OXIDATIVE STRESS;
EPITHELIAL-CELLS; GENE-EXPRESSION; EPIDERMAL-KERATINOCYTES;
TRANSFORMATION RESPONSE; VIMENTIN EXPRESSION; GLUCOSE DEPRIVATION;
ENDOTHELIAL-CELLS
AB The regulation of extracellular signal-regulated kinase (ERK) oscillations in the context of wound healing and carcinogenesis have been investigated in premalignant and malignant JB6 mouse epidermal cells stimulated with basic fibroblast growth factor (bFGF) and 12-O-tetradecanoyl phorbol-13-acetate (TPA). In premalignant JB6 cells, bFGF stimulation (1) increases cellular phospho-ERK and phospho-c-Jun levels, (2) increases serum-dependent cell proliferation, (3) induces an apparent epithelial-to-mesenchymal transition, and (4) induces the persistent nuclear-cytosolic oscillation of an ERK1-green fluorescent protein (ERK1-GFP) chimera. In contrast, TPA induces persistent activation of ERK in the absence of oscillations and does not induce efficient migration. Treatment of malignant or transformed JB6 cells with bFGF is associated with a transient nuclear translocation of ERK1-GFP but not oscillations or efficient cell migration. Our data suggest that bFGF regulates ERK oscillations in premalignant but not malignant JB6 cells.
C1 [Weber, Thomas J.; Wiley, H. Steven; Opresko, Lee K.; Chrisler, William B.; Quesenberry, Ryan D.] Pacific NW Natl Lab, Cell Biol & Biochem Grp, Fundamental Sci Div, Richland, WA 99354 USA.
[Shankaran, Harish] Pacific NW Natl Lab, Computat Biol & Bioinformat Grp, Fundamental Sci Div, Richland, WA 99354 USA.
RP Weber, TJ (reprint author), Pacific NW Natl Lab, Cell Biol & Biochem Grp, Fundamental Sci Div, 790 6th St,P7-56, Richland, WA 99354 USA.
EM Thomas.Weber@pnl.gov
OI Wiley, Steven/0000-0003-0232-6867
FU US Department of Energy Office of Biological and Environmental Research
[DE-AC05-76RL0 1830]
FX This research was supported by a grant from the US Department of Energy
Office of Biological and Environmental Research to T.J.W. This article
has been authored by Battelle Memorial Institute, Pacific Northwest
Division, under contract no. DE-AC05-76RL0 1830 with the US Department
of Energy. The publisher, by accepting the article for publication,
acknowledges that the United States Government retains a non-exclusive,
paid-up, irrevocable, worldwide license to publish or reproduce the
published form of this article, and to allow others to do so, for the
purposes of the United States Government.
NR 53
TC 12
Z9 12
U1 1
U2 1
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 0022-202X
J9 J INVEST DERMATOL
JI J. Invest. Dermatol.
PD MAY
PY 2010
VL 130
IS 5
BP 1444
EP 1456
DI 10.1038/jid.2009.383
PG 13
WC Dermatology
SC Dermatology
GA 587EL
UT WOS:000276972300032
PM 20016498
ER
PT J
AU Su, JJ
Graf, MJ
Balatsky, AV
AF Su, Jung-Jung
Graf, Matthias J.
Balatsky, Alexander V.
TI A Glassy Contribution to the Heat Capacity of hcp He-4 Solids
SO JOURNAL OF LOW TEMPERATURE PHYSICS
LA English
DT Article
DE Solid He-4; Glass; Supersolid; Quantum phase transition
ID NONCLASSICAL ROTATIONAL INERTIA; PRESSURE-DRIVEN FLOW;
THERMAL-CONDUCTIVITY; LOW-TEMPERATURES; VITREOUS SILICA; HELIUM;
SUPERFLUIDITY; SEARCH; CRYSTALS; PHONON
AB We model the low-temperature specific heat of solid He-4 in the hexagonal closed packed structure by invoking two-level tunneling states in addition to the usual phonon contribution of a Debye crystal for temperatures far below the Debye temperature, T < I similar to (D) /50. By introducing a cutoff energy in the two-level tunneling density of states, we can describe the excess specific heat observed in solid hcp He-4, as well as the low-temperature linear term in the specific heat. Agreement is found with recent measurements of the temperature behavior of both specific heat and pressure. These results suggest the presence of a very small fraction, at the parts-per-million (ppm) level, of two-level tunneling systems in solid He-4, irrespective of the existence of supersolidity.
C1 [Su, Jung-Jung; Graf, Matthias J.; Balatsky, Alexander V.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Balatsky, Alexander V.] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA.
RP Su, JJ (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA.
EM jungksu@lanl.gov
FU US Dept. of Energy [DE-AC52-06NA25396]
FX We enjoyed valuable discussions with Z. Nussinov, J. C. Davis, B. Hunt,
E. Pratt, J. M. Goodkind, and J. Beamish. We thank M. H. W. Chan and J.
West for discussion and for sharing their data. This work was supported
by the US Dept. of Energy at Los Alamos National Laboratory under
contract No. DE-AC52-06NA25396.
NR 59
TC 13
Z9 13
U1 1
U2 3
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0022-2291
J9 J LOW TEMP PHYS
JI J. Low Temp. Phys.
PD MAY
PY 2010
VL 159
IS 3-4
BP 431
EP 440
DI 10.1007/s10909-010-0163-x
PG 10
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 575IQ
UT WOS:000276061100001
ER
PT J
AU Blair, MW
Jacobsohn, LG
Tornga, SC
Ugurlu, O
Bennett, BL
Yukihara, EG
Muenchausen, RE
AF Blair, Michael W.
Jacobsohn, Luiz G.
Tornga, Stephanie C.
Ugurlu, Ozan
Bennett, Bryan L.
Yukihara, Eduardo G.
Muenchausen, Ross E.
TI Nanophosphor aluminum oxide: Luminescence response of a potential
dosimetric material
SO JOURNAL OF LUMINESCENCE
LA English
DT Article
DE Dosimetry; Nanophosphors; Optically stimulated luminescence;
Thermoluminescence; Aluminum oxide; Combustion synthesis
ID OPTICALLY STIMULATED LUMINESCENCE; COMBUSTION SYNTHESIS; AL2O3; POWDERS;
SCIENCE
AB This work reports on the investigation of the radiation dosimetry properties of Al(2)O(3) nanopowders. Samples were produced by solution combustion synthesis using three different organic fuels to check for the effect of synthesis conditions on the properties of interest. Luminescence characteristics were studied by thermoluminescence and optically stimulated luminescence (OSL) techniques. We found that samples produced using urea have characteristics similar to bulk Al(2)O(3):C and may be suitable for personal dosimetry, while samples produced using glycine and hexamethylenetetramine (HMT) may be more suitable for applications where fast OSL decay is advantageous. While these results are promising and warrant further investigation, much has to be done to overcome the greatly decreased luminescence intensity of the nanomaterials as compared to bulk Al(2)O(3):C. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Blair, Michael W.; Tornga, Stephanie C.; Bennett, Bryan L.; Muenchausen, Ross E.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Jacobsohn, Luiz G.] Clemson Univ, Ctr Opt Mat Sci & Engn Technol, Anderson, SC 29625 USA.
[Jacobsohn, Luiz G.] Clemson Univ, Sch Mat Sci & Engn, Anderson, SC 29625 USA.
[Yukihara, Eduardo G.] Oklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA.
[Ugurlu, Ozan] Univ Minnesota, Inst Technol, Characterizat Facil, Minneapolis, MN 55455 USA.
RP Blair, MW (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM mblair@lanl.gov
RI Yukihara, Eduardo/F-1345-2014;
OI Yukihara, Eduardo/0000-0002-4615-6698; Jacobsohn,
Luiz/0000-0001-8991-3903
NR 23
TC 13
Z9 15
U1 1
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-2313
J9 J LUMIN
JI J. Lumines.
PD MAY
PY 2010
VL 130
IS 5
BP 825
EP 831
DI 10.1016/j.jlumin.2009.12.008
PG 7
WC Optics
SC Optics
GA 576AJ
UT WOS:000276115600016
ER
PT J
AU Jacob, RE
Amidan, BG
Soelberg, J
Minard, KR
AF Jacob, Richard E.
Amidan, Brett G.
Soelberg, Jolen
Minard, Kevin R.
TI In Vivo MRI of Altered Proton Signal Intensity and T2 Relaxation in a
Bleomycin Model of Pulmonary Inflammation and Fibrosis
SO JOURNAL OF MAGNETIC RESONANCE IMAGING
LA English
DT Article
DE lung; bleomycin; inflammation; fibrosis
ID NUCLEAR-MAGNETIC-RESONANCE; SPONTANEOUSLY BREATHING RATS; INTERSTITIAL
LUNG-DISEASE; MURINE MODELS; WATER-CONTENT; DIFFERENTIATION; INJURY;
TIMES; HYDROXYPROLINE; BIOMECHANICS
AB Purpose: To investigate the ability of proton ((1)H) magnetic resonance imaging (MRI) to distinguish between pulmonary inflammation and fibrosis.
Materials and Methods: Three groups of Sprague-Dawley rats (n = 5) were instilled intratracheally with bleomycin (2.5 U/kg or 3.5 U/kg) in saline or with saline only. Rats were imaged at 2.0 Tesla using a multi-slice Carr-Purcell-Meilboom-Gill (CPMG) sequence with 6 ms echo spacing. Signal intensity (S(o)) and T(2) were calculated on a pixel-by-pixel basis using images collected before dosing and 1, 2, 4, and 7 weeks after. At each time point, data from dosed animals were compared with controls, and bivariate statistical analysis was used to classify image pixels containing abnormal tissue. At week 7, pulmonary function tests were performed. then all rats were killed, left lungs were formalin fixed and tri-chrome stained for histological analysis of collagen content, and right lungs were used to measure water and hydroxyproline (collagen) content.
Results: The product S(o)xT(2) significantly correlated with water and collagen content in the high-dose group (P = 0.004 and P = 0.03, respectively). However, S(o) and T(2) of abnormal tissue were correlated for all time points (r = 0.93, P < 0.001), and could not distinguish inflammation from fibrosis.
Conclusion: MRI can be used to confidently localize pulmonary inflammation and fibrosis, but it lacks specificity.
C1 [Jacob, Richard E.; Amidan, Brett G.; Soelberg, Jolen; Minard, Kevin R.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Jacob, RE (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd,POB 999 MSIN P7-58, Richland, WA 99352 USA.
EM richard.jacob@pnl.gov
FU U.S. Department of Energy's Office of Biological and Environmental
Research; Battelle Pulmonary Systems Biology Initiative, Battelle
Memorial Institute, Columbus, Ohio
FX The authors thank Terry Curry of PNNL for assistance with animal care
and handling, Jodi Me line of Battelle Toxicology Northwest for necropsy
and tissue harvesting, Kathy Gideon of Battelle Toxicology Northwest for
acquisition of histological images, and James Carson of PNNL and Robb
Glenny of the University of Washington for helpful discussions. A
portion of the research was performed using EMSL, a national scientific
user facility sponsored by the U.S. Department of Energy's Office of
Biological and Environmental Research and located at Pacific Northwest
National Laboratory.; Contract grant sponsor: the Battelle Pulmonary
Systems Biology Initiative, Battelle Memorial Institute, Columbus, Ohio.
NR 35
TC 18
Z9 18
U1 0
U2 4
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 1053-1807
J9 J MAGN RESON IMAGING
JI J. Magn. Reson. Imaging
PD MAY
PY 2010
VL 31
IS 5
BP 1091
EP 1099
DI 10.1002/jmri.22166
PG 9
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA 592RL
UT WOS:000277397100007
PM 20432343
ER
PT J
AU Esquinazi, P
Barzola-Quiquia, J
Spemann, D
Rothermel, M
Ohldag, H
Garcia, N
Setzer, A
Butz, T
AF Esquinazi, P.
Barzola-Quiquia, J.
Spemann, D.
Rothermel, M.
Ohldag, H.
Garcia, N.
Setzer, A.
Butz, T.
TI Magnetic order in graphite: Experimental evidence, intrinsic and
extrinsic difficulties
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 4th Joint European Magnetic Symposia (JEMS 08)
CY SEP 14-19, 2008
CL Dublin, IRELAND
SP Sci Fdn Ireland
DE Magnetic carbon; Irradiation effect
ID CARBON; MAGNETORESISTANCE; FILMS
AB We discuss recently obtained data using different experimental methods including magnetoresistance measurements that indicate the existence of metal-free high-temperature magnetic order in graphite. Intrinsic as well as extrinsic difficulties to trigger magnetic order by irradiation of graphite are discussed in view of recently published theoretical work. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Esquinazi, P.; Barzola-Quiquia, J.; Spemann, D.; Rothermel, M.; Setzer, A.; Butz, T.] Univ Leipzig, Inst Expt Phys 2, D-04103 Leipzig, Germany.
[Ohldag, H.] Stanford Univ, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
[Garcia, N.] CSIC, Lab Fis Sistemas Pequenos & Nanotecnol, E-28049 Madrid, Spain.
RP Esquinazi, P (reprint author), Univ Leipzig, Inst Expt Phys 2, D-04103 Leipzig, Germany.
EM esquin@physik.uni-leipzig.de
RI Ohldag, Hendrik/F-1009-2014;
OI Esquinazi, Pablo/0000-0003-0649-1472
NR 30
TC 35
Z9 35
U1 4
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
EI 1873-4766
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAY-JUN
PY 2010
VL 322
IS 9-12
BP 1156
EP 1161
DI 10.1016/j.jmmm.2009.06.038
PG 6
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 571IS
UT WOS:000275746100032
ER
PT J
AU Orna, J
Morellon, L
Algarabel, PA
Pardo, JA
Magen, C
Varela, M
Pennycook, SJ
De Teresa, JM
Ibarra, MR
AF Orna, J.
Morellon, L.
Algarabel, P. A.
Pardo, J. A.
Magen, C.
Varela, M.
Pennycook, S. J.
De Teresa, J. M.
Ibarra, M. R.
TI Growth of Sr2CrReO6 epitaxial thin films by pulsed laser deposition
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 4th Joint European Magnetic Symposia (JEMS 08)
CY SEP 14-19, 2008
CL Dublin, IRELAND
SP Sci Fdn Ireland
DE Epitaxial thin film; Laser ablation; Spintronics
ID HIGH-CURIE-TEMPERATURE; DOUBLE-PEROVSKITE; TRANSPORT-PROPERTIES;
SR2FEMOO6; SR2CRWO6
AB We report the growth, structural, magnetic, and electrical transport properties of epitaxial Sr2CrReO6 thin films. We have succeeded in depositing films with a high crystallinity and a relatively large cationic order in a narrow window of growth parameters. The epitaxy relationship is Sr2CrReO6 (SCRO) (001) [100]parallel to SrTiO3 (STO) (001) [110] as determined by high-resolution X-ray diffraction and scanning transmission electron microscopy (STEM). Typical values of saturation magnetization of M-S (300K) = 1 mu(B)/f. u. and rho (300K) = 2.8 m Omega cm have been obtained in good agreement with previous published results in sputtered epitaxial thin films. We estimate that the antisite defects concentration in our thin films is of the order of 14%, and the measured Curie temperature is T-C=481(2) K. We believe these materials be of interest as electrodes in spintronic devices. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Orna, J.; Morellon, L.; Ibarra, M. R.] Univ Zaragoza, Inst Nanociencia Aragon, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain.
[Orna, J.; Morellon, L.; Algarabel, P. A.; De Teresa, J. M.; Ibarra, M. R.] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain.
[Pardo, J. A.] Univ Zaragoza, Inst Nanociencia Aragon, Dept Ciencia & Tecnol Mat & Fluidos, Zaragoza 50018, Spain.
[Magen, C.; Varela, M.; Pennycook, S. J.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Morellon, L (reprint author), Univ Zaragoza, Inst Nanociencia Aragon, Dept Fis Mat Condensada, Pedro Cerbuna 12, E-50009 Zaragoza, Spain.
EM morellon@unizar.es
RI DE TERESA, JOSE/E-2430-2011; Algarabel, Pedro/K-8583-2014; PARDO,
JOSE/B-9490-2011; Ibarra, Manuel Ricardo/K-1150-2014; Varela,
Maria/H-2648-2012; Magen, Cesar/A-2825-2013; Varela, Maria/E-2472-2014
OI DE TERESA, JOSE/0000-0001-9566-0738; Algarabel,
Pedro/0000-0002-4698-3378; PARDO, JOSE/0000-0002-0111-8284; Ibarra,
Manuel Ricardo/0000-0003-0681-8260; /0000-0003-3724-508X; Varela,
Maria/0000-0002-6582-7004
NR 15
TC 8
Z9 8
U1 2
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
EI 1873-4766
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAY-JUN
PY 2010
VL 322
IS 9-12
BP 1217
EP 1220
DI 10.1016/j.jmmm.2009.04.029
PG 4
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 571IS
UT WOS:000275746100048
ER
PT J
AU Ney, V
Ye, S
Kammermeier, T
Ollefs, K
Ney, A
Kaspar, TC
Chambers, SA
Wilhelm, F
Rogalev, A
AF Ney, V.
Ye, S.
Kammermeier, T.
Ollefs, K.
Ney, A.
Kaspar, T. C.
Chambers, S. A.
Wilhelm, F.
Rogalev, A.
TI Tuning the magnetic properties of Zn1-xCoxO films
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 4th Joint European Magnetic Symposia (JEMS 08)
CY SEP 14-19, 2008
CL Dublin, IRELAND
SP Sci Fdn Ireland
DE Dilute magnetic semiconductor; X-ray absorption spectroscopy; Magnetic
property
AB We compare the magnetic properties of two types of Co-doped ZnO films grown on sapphire with distinct structural quality. SQUID magnetometry as well as element-specific synchrotron studies reveal pure paramagnetic behavior for the samples with the highest structural quality, whereas samples with reduced structural quality exhibit superparamagnetic blocking behavior. In this sample signatures of phase separation are detected by X-ray diffraction and X-ray linear dichroism which accounts for the superparamagnetic blocking. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Ney, V.; Ye, S.; Kammermeier, T.; Ollefs, K.; Ney, A.] Univ Duisburg Essen, Fachbereich Phys, D-47057 Duisburg, Germany.
[Ney, V.; Ye, S.; Kammermeier, T.; Ollefs, K.; Ney, A.] CeNIDE, D-47057 Duisburg, Germany.
[Kaspar, T. C.; Chambers, S. A.] Pacific NW Natl Lab, Fundamental & Computat Sci Directorate, Richland, WA 99352 USA.
[Wilhelm, F.; Rogalev, A.] European Synchrotron Radiat Facil, F-38043 Grenoble, France.
RP Ney, V (reprint author), Univ Duisburg Essen, Fachbereich Phys, D-47057 Duisburg, Germany.
EM vney@maglomat.de
RI Ollefs, Katharina/F-5677-2016; Ney, Verena/N-9480-2016;
OI Ollefs, Katharina/0000-0002-2301-4670; Ney, Verena/0000-0001-9413-8649;
Ney, Andreas/0000-0002-2388-6006
NR 3
TC 9
Z9 9
U1 3
U2 12
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
EI 1873-4766
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAY-JUN
PY 2010
VL 322
IS 9-12
BP 1232
EP 1234
DI 10.1016/j.jmmm.2009.04.024
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 571IS
UT WOS:000275746100052
ER
PT J
AU Smith, AM
Adler, FR
Perelson, AS
AF Smith, Amber M.
Adler, Frederick R.
Perelson, Alan S.
TI An accurate two-phase approximate solution to an acute viral infection
model
SO JOURNAL OF MATHEMATICAL BIOLOGY
LA English
DT Article
DE Acute virus infection; Influenza; Virus dynamics model; Approximation of
nonlinear differential equations
ID A VIRUS-INFECTION; DYNAMICS IN-VIVO; ANTIRETROVIRAL THERAPY;
HIV-INFECTION; DRUG EFFICACY
AB During an acute viral infection, virus levels rise, reach a peak and then decline. Data and numerical solutions suggest the growth and decay phases are linear on a log scale. While viral dynamic models are typically nonlinear with analytical solutions difficult to obtain, the exponential nature of the solutions suggests approximations can be found. We derive a two-phase approximate solution to the target cell limited influenza model and illustrate its accuracy using data and previously established parameter values of six patients infected with influenza A. For one patient, the fall in virus concentration from its peak was not consistent with our predictions during the decay phase and an alternate approximation is derived. We find expressions for the rate and length of initial viral growth in terms of model parameters, the extent each parameter is involved in viral peaks, and the single parameter responsible for virus decay. We discuss applications of this analysis in antiviral treatments and in investigating host and virus heterogeneities.
C1 [Smith, Amber M.; Adler, Frederick R.] Univ Utah, Dept Math, Salt Lake City, UT 84112 USA.
[Adler, Frederick R.] Univ Utah, Dept Biol, Salt Lake City, UT 84112 USA.
[Perelson, Alan S.] Los Alamos Natl Lab, Div Theoret, Theoret Biol & Biophys Grp, Los Alamos, NM 87545 USA.
RP Smith, AM (reprint author), Univ Utah, Dept Math, Salt Lake City, UT 84112 USA.
EM smith@math.utah.edu
FU National Science Foundation [DMS-0354259]; University of Utah; James S.
McDonnell Foundation (FRA); US Department of Energy [DE-AC52-06NA25396];
NIH [N01-AI-50020, RR06555-17, AI28433-18]
FX This material is based upon work supported by the National Science
Foundation under grant DMS-0354259 (AMS), the Modeling the Dynamics of
Life Fund at the University of Utah and the 21st Century Science
Initiative Grant from the James S. McDonnell Foundation (FRA). Portions
were done under the auspices of the US Department of Energy under
contract DE-AC52-06NA25396 and supported in part by NIH contract
N01-AI-50020 and grants RR06555-17 and AI28433-18 (ASP).
NR 20
TC 26
Z9 26
U1 1
U2 3
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0303-6812
J9 J MATH BIOL
JI J. Math. Biol.
PD MAY
PY 2010
VL 60
IS 5
BP 711
EP 726
DI 10.1007/s00285-009-0281-8
PG 16
WC Biology; Mathematical & Computational Biology
SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational
Biology
GA 571JU
UT WOS:000275748900004
PM 19633852
ER
PT J
AU Gentilcore, AN
Michaud-Agrawal, N
Crozier, PS
Stevens, MJ
Woolf, TB
AF Gentilcore, Anastasia N.
Michaud-Agrawal, Naveen
Crozier, Paul S.
Stevens, Mark J.
Woolf, Thomas B.
TI Examining the Origins of the Hydration Force Between Lipid Bilayers
Using All-Atom Simulations
SO JOURNAL OF MEMBRANE BIOLOGY
LA English
DT Article
DE Hydration force; Molecular dynamics; Entropy: enthalpy compensation;
Multilayer lipid system
ID MOLECULAR-DYNAMICS SIMULATION; PHOSPHOLIPID-BILAYERS;
PHOSPHATIDYLCHOLINE HEADGROUP; AMPHIPHILIC SURFACES;
COMPUTER-SIMULATION; LECITHIN BILAYERS; FLUID MEMBRANES; FREE-ENERGY;
WATER; REPULSION
AB Using 237 all-atom double bilayer simulations, we examined the thermodynamic and structural changes that occur as a phosphatidylcholine lipid bilayer stack is dehydrated. The simulated system represents a micropatch of lipid multilayer systems that are studied experimentally using surface force apparatus, atomic force microscopy and osmotic pressure studies. In these experiments, the hydration level of the system is varied, changing the separation between the bilayers, in order to understand the forces that the bilayers feel as they are brought together. These studies have found a curious, strongly repulsive force when the bilayers are very close to each other, which has been termed the "hydration force," though the origins of this force are not clearly understood. We computationally reproduce this repulsive, relatively free energy change as bilayers come together and make qualitative conclusions as to the enthalpic and entropic origins of the free energy change. This analysis is supported by data showing structural changes in the waters, lipids and salts that have also been seen in experimental work. Increases in solvent ordering as the bilayers are dehydrated are found to be essential in causing the repulsion as the bilayers come together.
C1 [Gentilcore, Anastasia N.; Michaud-Agrawal, Naveen; Woolf, Thomas B.] Johns Hopkins Univ, Sch Med, Dept Physiol, Baltimore, MD 21205 USA.
[Crozier, Paul S.; Stevens, Mark J.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Woolf, TB (reprint author), Johns Hopkins Univ, Sch Med, Dept Physiol, Baltimore, MD 21205 USA.
EM twoolf@jhmi.edu
FU NIH [R21GM076443, R01GM064746]; United States Department of Energy's
National Nuclear Security Administration [DE-AC04-94AL85000]
FX We thank Scott Feller for providing our initial POPC structure. We
acknowledge support from NIH under R21GM076443 and R01GM064746. Sandia
is a multiprogram laboratory operated by Sandia Corporation, a Lockheed
Martin Company, for the United States Department of Energy's National
Nuclear Security Administration under contract DE-AC04-94AL85000. This
work was completed in 2009 as part of the PhD research of Anastasia
Gentilcore.
NR 54
TC 10
Z9 10
U1 3
U2 16
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0022-2631
J9 J MEMBRANE BIOL
JI J. Membr. Biol.
PD MAY
PY 2010
VL 235
IS 1
BP 1
EP 15
DI 10.1007/s00232-010-9249-2
PG 15
WC Biochemistry & Molecular Biology; Cell Biology; Physiology
SC Biochemistry & Molecular Biology; Cell Biology; Physiology
GA 591YL
UT WOS:000277341400001
PM 20387061
ER
PT J
AU Mahurin, SM
Lee, JS
Baker, GA
Luo, HM
Dai, S
AF Mahurin, Shannon M.
Lee, Je Seung
Baker, Gary A.
Luo, Huimin
Dai, Sheng
TI Performance of nitrile-containing anions in task-specific ionic liquids
for improved CO2/N-2 separation
SO JOURNAL OF MEMBRANE SCIENCE
LA English
DT Article
DE Gas separations; Room temperature ionic liquids; Carbon dioxide;
Supported liquid membranes
ID CARBON-DIOXIDE; GAS SEPARATIONS; SOLUBILITY; CO2; IMIDAZOLIUM;
MEMBRANES; BIS(TRIFLUOROMETHYLSULFONYL)IMIDE; SELECTIVITIES;
DIFFUSIVITIES; VISCOSITY
AB This work explores the performance of a series of ionic liquids that incorporate a nitrile-containing anion paired to 1-alkyl-3-methylimidazolium cations in tailoring the selectivity and permeance of supported ionic liquid membranes for CO2/N-2 separations. The permeance and selectivity of three ionic liquids, each with an increasing number of nitrile groups in the anion (i.e., two, three, and four), were measured using a non-steady-state permeation method. By predictably varying the molar volume and viscosity of the ionic liquids, we show that the solubility, selectivity, and permeance can be optimized for CO2/N-2 separation through controlled introduction of the nitrile functionality into the anion. Of the three nitrile-based ionic liquids studied, 1-ethyl-3-methylimidazolium tetracyanoborate, [emim][B(CN)(4)], showed the highest permeance with a value of 2.55 x 10(-9) mol/(m(2) Pa s), a magnitude 30% higher than that of the popular ionic liquid [emim][Tf2N]. This same nitrile-bearing ionic liquid also exhibited a high CO2/N-2 selectivity of approximately 53. Additionally, the carbon dioxide solubility for each ionic liquid was measured at room temperature with [emim][B(CN)(4)] again exhibiting the highest CO2 solubility. Results from our study of the nitrile-based ionic liquids can be rationalized in terms of regular solution theory wherein the selectivity and permeance of a given SILM system are largely determined by the molar volume and viscosity of the corresponding ionic liquid phase. Published by Elsevier B.V.
C1 [Mahurin, Shannon M.; Lee, Je Seung; Baker, Gary A.; Luo, Huimin; Dai, Sheng] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Mahurin, SM (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM mahurinsm@ornl.gov; dais@ornl.gov
RI Baker, Gary/H-9444-2016; Dai, Sheng/K-8411-2015
OI Baker, Gary/0000-0002-3052-7730; Dai, Sheng/0000-0002-8046-3931
FU Division of Chemical Sciences, Geosciences, and Biosciences, Office of
Basic Energy Sciences, U.S. Department of Energy
FX This work was fully sponsored by the Division of Chemical Sciences,
Geosciences, and Biosciences, Office of Basic Energy Sciences, U.S.
Department of Energy.
NR 28
TC 106
Z9 111
U1 3
U2 72
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0376-7388
J9 J MEMBRANE SCI
JI J. Membr. Sci.
PD MAY 1
PY 2010
VL 353
IS 1-2
BP 177
EP 183
DI 10.1016/j.memsci.2010.02.045
PG 7
WC Engineering, Chemical; Polymer Science
SC Engineering; Polymer Science
GA 584PI
UT WOS:000276764300021
ER
PT J
AU Letant, SE
Kane, SR
Murphy, GA
Alfaro, TM
Hodges, LR
Rose, LJ
Raber, E
AF Letant, S. E.
Kane, S. R.
Murphy, G. A.
Alfaro, T. M.
Hodges, L. R.
Rose, L. J.
Raber, E.
TI Most-Probable-Number Rapid Viability PCR method to detect viable spores
of Bacillus anthracis in swab samples
SO JOURNAL OF MICROBIOLOGICAL METHODS
LA English
DT Article
DE Bacillus anthracis; Polymerase Chain Reaction; Rapid Viability; Spore
ID WATER
AB A comparison of Most-Probable-Number Rapid Viability (MPN RV) PCR and traditional culture methods for the quantification of Bacillus anthracis Sterne spores in macrofoam swabs from a multi-center validation study was performed. The purpose of the study was to compare environmental swab processing methods for recovery, detection, and quantification of viable B. anthracis spores from surfaces. Results show that spore numbers provided by the MPN RV-PCR method were typically within 1-log of the values from a plate count method for all three levels of spores tested (3.1 x 10(4), 400, and 40 spores sampled from surfaces with swabs) even in the presence of debris. The MPN method tended to overestimate the expected result, especially at lower spore levels. Blind negative samples were correctly identified using both methods showing a lack of cross contamination. In addition to detecting low levels of spores in environmental conditions, the MPN RV-PCR method is specific, and compatible with automated high-throughput sample processing and analysis protocols, enhancing its utility for characterization and clearance following a biothreat agent release. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Letant, S. E.; Kane, S. R.; Murphy, G. A.; Alfaro, T. M.; Raber, E.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Hodges, L. R.; Rose, L. J.] Ctr Dis Control & Prevent, Div Healthcare Qual Promot, Natl Ctr Preparedness Detect & Control Infect Dis, Atlanta, GA 30333 USA.
RP Kane, SR (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave L-452, Livermore, CA 94550 USA.
EM kane11@llnl.gov
FU U.S. Department of Energy [DE-AC52-07NA27344]; Department of Homeland
Security; Defense Threat Reduction Agency
FX This work was performed under the auspices of the U.S. Department of
Energy by Lawrence Livermore National Laboratory under Contract
DE-AC52-07NA27344. Funding for this research was provided by the
Department of Homeland Security and the Defense Threat Reduction Agency.
NR 5
TC 8
Z9 8
U1 0
U2 9
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-7012
J9 J MICROBIOL METH
JI J. Microbiol. Methods
PD MAY
PY 2010
VL 81
IS 2
BP 200
EP 202
DI 10.1016/j.mimet.2010.02.011
PG 3
WC Biochemical Research Methods; Microbiology
SC Biochemistry & Molecular Biology; Microbiology
GA 599YJ
UT WOS:000277949900019
PM 20193716
ER
PT J
AU Shin, DH
Lee, SH
Choi, CK
Retterer, S
AF Shin, Dong Hwan
Lee, Seong Hyuk
Choi, Chang Kyoung
Retterer, Scott
TI The evaporation and wetting dynamics of sessile water droplets on
submicron-scale patterned silicon hydrophobic surfaces
SO JOURNAL OF MICROMECHANICS AND MICROENGINEERING
LA English
DT Article
ID SUPERHYDROPHOBIC SURFACES; MICROFLUIDICS
AB The evaporation characteristics of 1 mu l sessile water droplets on hydrophobic surfaces are experimentally examined. The proposed hydrophobic surfaces are composed of submicron diameter and 4.2 mu m height silicon post arrays. A digital image analysis algorithm was developed to obtain time-dependent contact angles, contact diameters, and center heights for both non-patterned polydimethylsiloxane (PDMS) surfaces and patterned post array surfaces, which have the same hydrophobic contact angles. While the contact angles exhibit three distinct stages during evaporation in the non-patterned surface case, those in the patterned silicon post array surface case decrease linearly. In the case of post array hydrophobic surfaces, the initial contact diameter remains unchanged until the portion of the droplet above the posts completely dries out. The edge shrinking velocity of the droplet shows nonlinear characteristics, and the velocity magnitude increases rapidly near the last stage of evaporation.
C1 [Shin, Dong Hwan; Lee, Seong Hyuk] Chung Ang Univ, Sch Mech Engn, Seoul 156756, South Korea.
[Choi, Chang Kyoung] Michigan Technol Univ, Dept Mech Engn Engn Mech, Houghton, MI 49931 USA.
[Retterer, Scott] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Lee, SH (reprint author), Chung Ang Univ, Sch Mech Engn, Seoul 156756, South Korea.
EM shlee89@cau.ac.kr; cchoi@mtu.edu
RI Retterer, Scott/A-5256-2011
OI Retterer, Scott/0000-0001-8534-1979
FU Division of Scientific User Facilities, US Department of Energy;
Michigan Technological University Research Initiation Grant; Manpower
Development Program for Energy and Resources; Ministry of Knowledge and
Economy (MKE) of the Korean government
FX A portion of this research was conducted at the Center for Nanophase
Materials Sciences, sponsored at Oak Ridge National Laboratory by the
Division of Scientific User Facilities, US Department of Energy. This
research was also sponsored, in part, by a Michigan Technological
University Research Initiation Grant (CKC). This work was also partially
sponsored by the Manpower Development Program for Energy and Resources,
supported by the Ministry of Knowledge and Economy (MKE) of the Korean
government (SHL).
NR 14
TC 13
Z9 13
U1 0
U2 13
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0960-1317
J9 J MICROMECH MICROENG
JI J. Micromech. Microeng.
PD MAY
PY 2010
VL 20
IS 5
AR 055021
DI 10.1088/0960-1317/20/5/055021
PG 5
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Instruments & Instrumentation; Physics, Applied
SC Engineering; Science & Technology - Other Topics; Instruments &
Instrumentation; Physics
GA 591MN
UT WOS:000277305000021
ER
PT J
AU Li, L
Kim, KA
Koeppen, A
Qian, J
AF Li, Li
Kim, Kelly-Ann
Koeppen, Arnulf
Qian, Jiang
TI CNS Mycobacterium Haemophilum Infection Manifested as a Pontine Mass in
an HIV-Positive Patient. A Case Report
SO JOURNAL OF NEUROPATHOLOGY AND EXPERIMENTAL NEUROLOGY
LA English
DT Meeting Abstract
CT 86th Annual Meeting of the American-Association-of-Neuropathologists
CY JUN 10-13, 2010
CL Philadelphia, PA
SP Amer Assoc Neuropathologists
C1 [Qian, Jiang] Albany Med Coll, APS, Albany, NY 12208 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0022-3069
J9 J NEUROPATH EXP NEUR
JI J. Neuropathol. Exp. Neurol.
PD MAY
PY 2010
VL 69
IS 5
MA 49
BP 533
EP 533
PG 1
WC Clinical Neurology; Neurosciences; Pathology
SC Neurosciences & Neurology; Pathology
GA 594WV
UT WOS:000277571500058
ER
PT J
AU Kawano, T
Talou, P
Chadwick, MB
Watanabe, T
AF Kawano, Toshihiko
Talou, Patrick
Chadwick, Mark B.
Watanabe, Takehito
TI Monte Carlo Simulation for Particle and gamma-Ray Emissions in
Statistical Hauser-Feshbach Model
SO JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
LA English
DT Article
DE nuclear reaction; nuclear data; statistical model; secondary particle
energy spectra; Monte Carlo method
ID NUCLEAR-DATA LIBRARY; FISSION FRAGMENTS; FORMULA; CODE
AB Monte Carlo simulations for particle and gamma-ray emissions from a compound nucleus based on the Hauser-Feshbach statistical theory with pre-equilibrium emission are performed. The simulation yields reliable nuclear-reaction-wise energy spectra, or so-called exclusive spectra, for emitted neutrons and gamma-rays, which are required in particle transport calculations for nuclear applications. The Monte Carlo method is applied to neutron-induced nuclear reactions on Fe-56, and the results are compared with a traditional deterministic method. The neutron and gamma-ray emission correlation is examined by gating on an 847 keV gamma-ray that is produced by an inelastic scattering process. The partial gamma-ray energy spectra for different gamma-ray multiplicities are inferred using this Monte Carlo method. In addition, we investigate a correlation between two neutrons in the (n,2n) reaction.
C1 [Kawano, Toshihiko; Talou, Patrick; Chadwick, Mark B.; Watanabe, Takehito] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Kawano, T (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM kawano@lanl.gov
FU National Nuclear Security Administration of the U.S. Department of
Energy at Los Alamos National Laboratory [DE-AC52-06NA25396]
FX This work was partly performed under the auspices of an agreement
between CEA/DAM and NNSA/NP on cooperation on fundamental science, P140
"Collaborative exchanges of nuclear reaction modeling codes and data."
We would like to thank R. C. Haight and R. C. Little of LANL for
encouraging this work. This work was carried out under the auspices of
the National Nuclear Security Administration of the U.S. Department of
Energy at Los Alamos National Laboratory under Contract No.
DE-AC52-06NA25396.
NR 33
TC 43
Z9 43
U1 1
U2 5
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0022-3131
EI 1881-1248
J9 J NUCL SCI TECHNOL
JI J. Nucl. Sci. Technol.
PD MAY
PY 2010
VL 47
IS 5
BP 462
EP 469
DI 10.1080/18811248.2010.9711637
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 619EY
UT WOS:000279413200005
ER
PT J
AU Watanabe, T
Kawano, T
Chadwick, MB
Nelson, RO
Hilaire, S
Bauge, E
Dossantos-Uzarralde, P
AF Watanabe, Takehito
Kawano, Toshihiko
Chadwick, Mark B.
Nelson, Ronald O.
Hilaire, Stephane
Bauge, Erick
Dossantos-Uzarralde, Pierre
TI Calculation of Prompt Fission Product Average Cross Sections for
Neutron-Induced Fission of U-235 and Pu-239
SO JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
LA English
DT Article
DE yield-weighted average cross section; neutron-induced reaction; prompt
fission product; fission product yield (FPY); EMPIRE; TALYS; GNASH;
ENDF/B-VII; fast reactor
ID MULTISTEP COMPOUND; STATISTICAL-THEORY; MODEL; STRENGTH; GENERATION
AB Yield-weighted average cross sections of neutron radiative capture, (n,2n), and (n,3n) reactions over prompt fission products (FPs) from U-235 and Pu-239 are calculated. The prompt fission production yields are taken from the ENDF/B-VII.0 library. The FPs for each fissile material exist over a range of approximately 1000 neutron-rich nuclides. Several nuclear reaction codes are utilized for calculating the cross sections on each individual fission product EMPIRE-2.19, TALYS-1.0, GNASH, and CoH. The influence of the FP isomers on the average cross sections is examined with TALYS. We investigate the dependence of the average cross sections on the number of FPs taken for averaging. It is shown that the average capture cross section is much more sensitive to the number of FPs included, compared with the (n,2n) and (n,3n) reactions. An intercomparison of the calculated cross sections with the different reaction codes is carried out. In the capture reaction, EMPIRE predicted lower cross section than TALYS and CoH owing to different default assumptions used in the gamma-ray strength function modeling. Moreover, the pre-equilibrium models implemented in each code give different predictions for the neutron-emission reactions, although the differences are relatively small. We also discuss a difference between the macroscopic and microscopic calculation options in TALYS for the pre-equilibrium model, optical potential model, and gamma-ray strength function. The predictive capability of the reaction codes for the capture reaction is examined by comparing their calculations with the ENDF data, which are based on measurements. Compared with the historic Foster and Arthur's evaluation, our new (n,2n) predictions are similar, although our capture predictions are almost an order of magnitude higher. Recommended cross sections for use in applications have been tabulated in ENDF-formatted files.
C1 [Watanabe, Takehito; Kawano, Toshihiko; Chadwick, Mark B.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Nelson, Ronald O.] Los Alamos Natl Lab, LANSCE NS, Los Alamos, NM 87545 USA.
[Hilaire, Stephane; Bauge, Erick; Dossantos-Uzarralde, Pierre] CEA, DAM, DIF, F-91297 Arpajon, France.
RP Watanabe, T (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM watanabe@lanl.gov
FU National Nuclear Security Administration of the U.S. Department of
Energy at Los Alamos National Laboratory [DE-AC52-06NA25396]
FX This work was performed under the auspices of an agreement between
CEA/DAM and NNSA on cooperation on fundamental science. This work was
carried out under the auspices of the National Nuclear Security
Administration of the U.S. Department of Energy at Los Alamos National
Laboratory under contract No. DE-AC52-06NA25396.
NR 31
TC 1
Z9 1
U1 1
U2 1
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0022-3131
EI 1881-1248
J9 J NUCL SCI TECHNOL
JI J. Nucl. Sci. Technol.
PD MAY
PY 2010
VL 47
IS 5
BP 478
EP 481
DI 10.1080/18811248.2010.9711638
PG 4
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 619EY
UT WOS:000279413200006
ER
PT J
AU Cook, BA
Russell, AM
Peters, J
Harringa, JL
AF Cook, B. A.
Russell, A. M.
Peters, J.
Harringa, J. L.
TI Estimation of surface energy and bonding between AlMgB14 and TiB2
SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
LA English
DT Article
DE Ceramics; Interfaces; Fracture
ID ULTRA-HARD ALMGB14
AB Composites of AlMgB14 with TiB2 display a positive deviation from the rule-of-mixtures for hardness and wear resistance [1] (Ahmed et al., 2006). This suggests exceptionally strong bonding between the two boride phases. A contributing factor to the strong bonding may be a close matching of surface energy in the two phases. A calculation was performed to estimate the surface energy and its temperature dependence in AlMgB14, based on the critical crack energy release rate and assuming covalent bonding. Results predict that the surface energy of the two phases differs by about 0.4 J/m(2). Similar results were found for other transition metal diborides, and the surface energy of AlMgB14 was close to that of TiC and TiN, two materials commonly used as sintering aids for TiB2. (C) 2010 Elsevier Ltd. All rights reserved.
C1 [Cook, B. A.; Peters, J.; Harringa, J. L.] Iowa State Univ, Div Engn & Mat Sci, Ames Lab, Ames, IA 50010 USA.
[Russell, A. M.] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
RP Cook, BA (reprint author), Iowa State Univ, Div Engn & Mat Sci, Ames Lab, Ames, IA 50010 USA.
EM cook@ameslab.gov
OI Russell, Alan/0000-0001-5264-0104
FU Iowa State University [DE-AC-02-07CH11358]; Office of Energy Efficiency
and Renewable Energy, Industrial Technologies Program
FX The Ames Laboratory is operated for the U.S. Department of Energy by
Iowa State University under contract DE-AC-02-07CH11358. This project
was supported in part by the Office of Energy Efficiency and Renewable
Energy, Industrial Technologies Program.
NR 15
TC 6
Z9 6
U1 0
U2 18
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0022-3697
J9 J PHYS CHEM SOLIDS
JI J. Phys. Chem. Solids
PD MAY
PY 2010
VL 71
IS 5
BP 824
EP 826
DI 10.1016/j.jpcs.2010.02.009
PG 3
WC Chemistry, Multidisciplinary; Physics, Condensed Matter
SC Chemistry; Physics
GA 594OW
UT WOS:000277548000018
ER
PT J
AU Negoita, AG
Vary, JP
Stoica, S
AF Negoita, A. G.
Vary, J. P.
Stoica, S.
TI No-core shell model for A=47 and A=49
SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
LA English
DT Article
ID NUCLEON SYSTEMS; LIGHT-NUCLEI; BREAKING
AB We apply the no-core shell model to the nuclear structure of odd-mass nuclei straddling (48)Ca. Starting with the NN interaction, that fits two-body scattering and bound state data, we evaluate the nuclear properties of A = 47 and A = 49 nuclei while preserving all the underlying symmetries. Due to model space limitations and the absence of three-body interactions, we incorporate phenomenological interaction terms determined by fits to A = 48 nuclei in a previous effort. Our modified Hamiltonian produces reasonable spectra for these odd-mass nuclei. In addition to the differences in single-particle basis states, the absence of a single-particle Hamiltonian in our no-core approach complicates comparisons with valence effective NN interactions. We focus on purely off-diagonal two-body matrix elements since they are not affected by ambiguities in the different roles for one-body potentials and we compare selected sets of fp-shell matrix elements of our initial and modified Hamiltonians in the harmonic oscillator basis with those of a recent model fp-shell interaction, the GXPF1 interaction of Honma et al. While some significant differences emerge from these comparisons, there is an overall reasonably good correlation between our off-diagonal matrix elements and those of GXPF1.
C1 [Negoita, A. G.; Vary, J. P.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Negoita, A. G.; Stoica, S.] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest 76900, Romania.
[Vary, J. P.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Negoita, AG (reprint author), Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
FU U.S. Department of Energy [DE-FG02-87ER40371, DE-FC02-09ER41582];
University of California; Lawrence Livermore National Laboratory
[W-7405-Eng-48]; Division of Nuclear Physics; NSF [INT0070789]
FX This work was partly performed under the auspices of the U.S. Department
of Energy by the University of California, Lawrence Livermore National
Laboratory under contract noW-7405-Eng-48. This work was also supported
in part by USDOE grants DE-FG02-87ER40371 and DE-FC02-09ER41582,
Division of Nuclear Physics, and, in part, by NSF grant INT0070789.
NR 48
TC 2
Z9 2
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0954-3899
J9 J PHYS G NUCL PARTIC
JI J. Phys. G-Nucl. Part. Phys.
PD MAY
PY 2010
VL 37
IS 5
AR 055109
DI 10.1088/0954-3899/37/5/055109
PG 16
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 579YA
UT WOS:000276412200013
ER
PT J
AU Lu, XC
Xia, GG
Lemmon, JP
Yang, ZG
AF Lu, Xiaochuan
Xia, Guanguang
Lemmon, John P.
Yang, Zhenguo
TI Advanced materials for sodium-beta alumina batteries: Status, challenges
and perspectives
SO JOURNAL OF POWER SOURCES
LA English
DT Review
DE Sodium-beta alumina battery; beta ''-Al(2)O(3) electrolyte; Molten
sodium; Sulfur; Transition metal chlorides
ID LITHIA-STABILIZED BETA''-ALUMINA; SINGLE-CRYSTAL; BETA''-AL2O3/ZRO2
COMPOSITES; ELECTRICAL-PROPERTIES; IONIC-CONDUCTIVITY; RESISTANCE RISE;
SULFUR CELLS; AC-IMPEDANCE; GRAIN-SIZE; POLYCRYSTALLINE
AB The increasing penetration of renewable energy and the trend toward clean, efficient transportation have spurred growing interests in sodium-beta alumina batteries that store electrical energy via sodium ion transport across a beta ''-Al(2)O(3) solid electrolyte at elevated temperatures (typically 300-350 degrees C ). Currently, the negative electrode or anode is metallic sodium in molten state during battery operation; the positive electrode or cathode can be molten sulfur (Na-S battery) or solid transition metal halides plus a liquid phase secondary electrolyte (e.g., ZEBRA battery). Since the groundbreaking works in the sodium-beta alumina batteries a few decades ago, encouraging progress has been achieved in improving battery performance, along with cost reduction. However, there remain issues that hinder broad applications and market penetration of the technologies. To better the Na-beta alumina technologies require further advancement in materials along with component and system design and engineering. This paper offers a comprehensive review on materials of electrodes and electrolytes for the Na-beta alumina batteries and discusses the challenges ahead for further technology improvement. (C) 2009 Published by Elsevier B.V.
C1 [Lu, Xiaochuan; Xia, Guanguang; Lemmon, John P.; Yang, Zhenguo] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Yang, ZG (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd,POB 999,K2-44, Richland, WA 99352 USA.
EM Zgary.Yang@pnl.gov
FU Laboratory-Directed Research and Development Program (LDRD); Pacific
Northwest National Laboratory (PNNL); US Department of Energy's Advanced
Research Projects Agency-Energy (ARPA-E); Office of Electricity Delivery
& Energy Reliability's; US Department of Energy [DE-AC05-76RL01830]
FX The work is supported by Laboratory-Directed Research and Development
Program (LDRD) of the Pacific Northwest National Laboratory (PNNL), the
US Department of Energy's Advanced Research Projects Agency-Energy
(ARPA-E), and Office of Electricity Delivery & Energy Reliability's
storage program. PNNL is a multiprogram laboratory operated by Battelle
Memorial Institute for the US Department of Energy under Contract
DE-AC05-76RL01830.
NR 104
TC 163
Z9 172
U1 46
U2 374
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-7753
J9 J POWER SOURCES
JI J. Power Sources
PD MAY 1
PY 2010
VL 195
IS 9
BP 2431
EP 2442
DI 10.1016/j.jpowsour.2009.11.120
PG 12
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 555WG
UT WOS:000274546700002
ER
PT J
AU Xiong, LF
More, KL
He, T
AF Xiong, Liufeng
More, Karren L.
He, Ting
TI Syntheses, characterization, and catalytic oxygen electroreduction
activities of carbon-supported PtW nanoparticle catalysts
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE Ptw; Fuel cell; ORR; Electrocatalyst; Synthesis
ID FUEL-CELL APPLICATIONS; ELECTROCATALYTIC ACTIVITY; ALLOY
ELECTROCATALYSTS; REDUCTION REACTION; PLATINUM; SURFACE; ELECTROLYTE;
COMPLEXES; TUNGSTEN; METHANOL
AB Carbon-supported PtW (PtW/C) alloy nanoparticle catalysts with well-controlled particle size, dispersion, and composition uniformity, have been synthesized by wet chemical methods of decomposition of carbonyl cluster complexes, hydrolysis of metal salts, and chemical reactions within a reverse microemulsion. The synthesized PtW/C catalysts were characterized by X-ray diffraction, high-resolution transmission electron microscopy, and energy-dispersive spectroscopy. The catalytic oxygen electroreduction activities were measured by the hydrodynamic rotating disk electrode technique in an acidic electrolyte. The influence of the synthesis method on PtW particle size, size distribution, composition uniformity, and catalytic oxygen electroreduction activity, have been investigated. Among the synthesis methods studied, PtW/Ccatalysts prepared by the decomposition of carbonyl cluster complexes displayed the best platinum mass activity for oxygen reduction reaction under the current small scale production; a 3.4-fold catalytic enhancement was achieved in comparison to a benchmark Pt/C standard. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Xiong, Liufeng; He, Ting] Honda Res Inst USA Inc, Columbus, OH 43212 USA.
[More, Karren L.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP He, T (reprint author), Honda Res Inst USA Inc, 1381 Kinnear Rd, Columbus, OH 43212 USA.
EM the@honda-ri.com
RI More, Karren/A-8097-2016; He, Ting/B-8120-2017
OI More, Karren/0000-0001-5223-9097; He, Ting/0000-0002-8877-0215
FU U.S. Department of Energy; Office of Hydrogen, Fuel Cells, and
Infrastructure Technologies [DE-AC05-00OR22725]; ORNL's SHaRE User
Facility; Scientific User Facilities Division, Office of Basic Energy
Science
FX Part of this research (KLM) was supported by the U.S. Department of
Energy, Office of Hydrogen, Fuel Cells, and Infrastructure Technologies,
as part of contract DE-AC05-00OR22725 with UT-Battelle, LLC. Microscopy
Research (KLM) was supported by ORNL's SHaRE User Facility, sponsored by
the Scientific User Facilities Division, Office of Basic Energy Science,
the U.S. Department of Energy. The authors acknowledge Eric Kreidler for
his kind assistance in preparing the manuscript.
NR 46
TC 9
Z9 9
U1 5
U2 24
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-7753
J9 J POWER SOURCES
JI J. Power Sources
PD MAY 1
PY 2010
VL 195
IS 9
BP 2570
EP 2578
DI 10.1016/j.jpowsour.2009.11.013
PG 9
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 555WG
UT WOS:000274546700020
ER
PT J
AU Hong, ST
Weil, KS
Bae, IT
Choi, JP
Pan, J
AF Hong, Sung-Tae
Weil, K. Scott
Bae, In-Tae
Choi, Jung Pyung
Pan, Jwo
TI Annealing induced interfacial layers in niobium-clad stainless steel
developed as a bipolar plate material for polymer electrolyte membrane
fuel cell stacks
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE Cladding; Bipolar plate; Proton exchange membrane fuel cell; Annealing
ID LAVES PHASES; ALLOYS; NB
AB Roll-bonded niobium (Nb)-clad 304 L stainless steel (SS) is currently being developed as a metallic bipolar plate material for polymer electrolyte membrane fuel cell stacks. Prior work has shown that post-roll annealing significantly softens the constituent core and cladding materials, enhancing the ductility and formability of each. However under the vacuum annealing condition employed in the previous study (900s, 982 degrees C (1800 F)). an interfacial layer was observed to form between the two bonded materials. Subsequent bending and flattening tests indicated brittle failure of this interfacial region under high strain conditions. The present study employs transmission electron microscopy to examine the composition, structure, and thickness of phases generated at the Nb/SS interface as functions of annealing temperature and time. Corresponding selected electron diffraction patterns indicate that above a threshold annealing temperature of similar to 950 degrees C, the formation of (Fe(1-x)Cr(x))(2)Nb appears to control the failure behavior of the Nb/304 L SS material. Annealing treatments conducted below this temperature generally avoid the formation of this intermetallic layer. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Hong, Sung-Tae] Univ Ulsan, Sch Mech & Automat Engn, Ulsan 680749, South Korea.
[Weil, K. Scott; Choi, Jung Pyung] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Bae, In-Tae] SUNY Binghamton, Small Scale Syst Integrat & Packaging Ctr, Binghamton, NY 13902 USA.
[Pan, Jwo] Univ Michigan, Ann Arbor, MI 48109 USA.
RP Hong, ST (reprint author), Univ Ulsan, Sch Mech & Automat Engn, 29 Mugeo2 Dong, Ulsan 680749, South Korea.
EM sthong@ulsan.ac.kr; scott.weil@pnl.gov
RI Choi, Seungtae/C-6821-2011; Hong, Sung Tae/K-2720-2015
OI Choi, Seungtae/0000-0002-4119-9787; Hong, Sung Tae/0000-0003-2263-7099
FU the U.S. Department of Energy, Office of Energy Efficiency, and
Renewable Energy [DE-AC06-76RLO 1830]
FX The authors thank Steve Chang at Engineered Materials Solutions, Inc.
for providing the clad materials and for his technical assistance in the
study. This work was supported by the research fund of the University of
Ulsan. This work was also supported by the U.S. Department of Energy,
Office of Energy Efficiency, and Renewable Energy. The Pacific Northwest
National Laboratory is operated by the Battelle Memorial Institute for
the United States Department of Energy (U.S. DOE) under Contract
DE-AC06-76RLO 1830.
NR 19
TC 6
Z9 7
U1 1
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-7753
J9 J POWER SOURCES
JI J. Power Sources
PD MAY 1
PY 2010
VL 195
IS 9
BP 2592
EP 2598
DI 10.1016/j.jpowsour.2009.10.034
PG 7
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 555WG
UT WOS:000274546700023
ER
PT J
AU Elvington, MC
Colon-Mercado, H
McCatty, S
Stone, SG
Hobbs, DT
AF Elvington, Mark C.
Colon-Mercado, Hector
McCatty, Steve
Stone, Simon G.
Hobbs, David T.
TI Evaluation of proton-conducting membranes for use in a sulfur dioxide
depolarized electrolyzer
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE Sulfur dioxide transport; Proton exchange membrane; Hybrid Sulfur
Process
ID ACID DOPED POLYBENZIMIDAZOLE; HYDROGEN-PRODUCTION; STATE; CELL
AB The chemical stability, sulfur dioxide transport, ionic conductivity, and electrolyzer performance have been measured for several commercially available and experimental proton exchange membranes(PEMs) for use in a sulfur dioxide depolarized electrolyzer (SDE). The SDEs function is to produce hydrogen by using the Hybrid Sulfur (HyS) Process, a sulfur-based electrochemical/thermochemical hybrid cycle. Membrane stability was evaluated using a screening process where each candidate PEM was heated at 80 degrees C in 60 wt% H(2)SO(4) for 24 h. Following acid exposure, chemical stability for each membrane was evaluated by FTIR using the ATR sampling technique. Membrane SO(2) transport was evaluated using a two-chamber permeation cell. SO(2) was introduced into one chamber whereupon SO(2) transported across the membrane into the other chamber and oxidized to H(2)SO(4) at an anode positioned immediately adjacent to the membrane. The resulting current was used to determine the SO(2) flux and SO(2) transport. Additionally, membrane electrode assemblies (MEAs) were prepared from candidate membranes to evaluate ionic conductivity and selectivity (ionic conductivity vs. SO(2) transport) which can serve as a tool for selecting membranes. MEAs were also performance tested in a HyS electrolyzer measuring current density vs. a constant cell voltage (1 V. 80 degrees C in SO(2) saturated 30 wt% H(2)SO(4)). Finally, candidate membranes were evaluated considering all measured parameters including SO(2) flux, SO(2) transport, ionic conductivity, HyS electrolyzer performance, and membrane stability. Candidate membranes included both PFSA and non-PFSA polymers and polymer blends of which the non-PFSA polymers, BPVE-6F and PBI, showed the best selectivity. (C) 2009 David T. Hobbs. Published by Elsevier B.V. All rights reserved.
C1 [Hobbs, David T.] Savannah River Nucl Solut LLC, Savannah River Natl Lab, Aiken, SC 29808 USA.
[McCatty, Steve; Stone, Simon G.] Giner Electrochem Syst LLC, Newton, MA USA.
RP Hobbs, DT (reprint author), Savannah River Nucl Solut LLC, Savannah River Natl Lab, Bldg 773-A,B-117, Aiken, SC 29808 USA.
EM david.hobbs@srnl.doe.gov
FU U.S. Department of Energy [AC09-08SR22470]; Office of Nuclear Energy;
Nuclear Hydrogen Initiative
FX This work was funded by the U.S. Department of Energy, Office of Nuclear
Energy, Nuclear Hydrogen Initiative. SRNL is operated by Savannah River
Nuclear Solutions for the U.S. Department of Energy under Contract
DE-AC09-08SR22470.
NR 16
TC 19
Z9 19
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-7753
J9 J POWER SOURCES
JI J. Power Sources
PD MAY 1
PY 2010
VL 195
IS 9
BP 2823
EP 2829
DI 10.1016/j.jpowsour.2009.11.031
PG 7
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 555WG
UT WOS:000274546700057
ER
PT J
AU Wu, HM
Belharouak, I
Abouimrane, A
Sun, YK
Amine, K
AF Wu, H. M.
Belharouak, I.
Abouimrane, A.
Sun, Y. -K.
Amine, K.
TI Surface modification of LiNi0.5Mn1.5O4 by ZrP2O7 and ZrO2 for
lithium-ion batteries
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE Lithium-ion batteries; LiNi0.5Mn1.5O4; ZrO2 coating; ZrP2O7 coating
ID SPINEL; LI; LIMN2O4; PHASE; PERFORMANCE; INSERTION; BEHAVIOR; CELLS;
ANODE; NI
AB The spinet LiNi0.5Mn1.5O4 has been surface modified separately with 1.0 wt.% ZrO2 and ZrP2O7 for the purpose of improving its cycle performance as a cathode in a 5-V lithium-ion cell. Although the modifications did not change the crystallographic structure of the surface-modified samples, they exhibited better cyclability at elevated temperature (55 degrees C) compared with pristine LiNi0.5Mn1.5O4. The material that was surface modified with ZrO2 gave the best cycling performance, only 4% loss of capacity after 150 cycles at 55 degrees C. Electrochemical impedance spectroscopy demonstrated that the improved performance of the ZrO2-surface-modified LiNi0.5Mn1.5O4 is due to a small decrease in the charge transfer resistance, indicating limited surface reactivity during cycling. Differential scanning calorimetry showed that the ZrO2-modified LiNi0.5Mn1.5O4 exhibits lower heat generation and higher onset reaction temperature compared to the pristine material. The excellent cycling and safety performance of the ZrO2-modified LiNi0.5Mn1.5O4 electrode was found to be due to the protective effect of homogeneous ZrO2 nano-particles that form on the LiNi0.5Mn1.5O4, as shown by transmission electron microscopy. Published by Elsevier B.V.
C1 [Wu, H. M.; Belharouak, I.; Abouimrane, A.; Amine, K.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
[Sun, Y. -K.] Hanyang Univ, Dept Chem Engn, Ctr Informat & Commun Mat, Seoul 133791, South Korea.
RP Amine, K (reprint author), Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM amine@anl.gov
RI Sun, Yang-Kook/B-9157-2013; Amine, Khalil/K-9344-2013;
OI Sun, Yang-Kook/0000-0002-0117-0170; Belharouak,
Ilias/0000-0002-3985-0278
NR 25
TC 141
Z9 152
U1 18
U2 145
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-7753
J9 J POWER SOURCES
JI J. Power Sources
PD MAY 1
PY 2010
VL 195
IS 9
BP 2909
EP 2913
DI 10.1016/j.jpowsour.2009.11.029
PG 5
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 555WG
UT WOS:000274546700070
ER
PT J
AU Erickson, BK
Mueller, RS
VerBerkmoes, NC
Shah, M
Singer, SW
Thelen, MP
Banfield, JF
Hettich, RL
AF Erickson, Brian K.
Mueller, Ryan S.
VerBerkmoes, Nathan C.
Shah, Manesh
Singer, Steven W.
Thelen, Michael P.
Banfield, Jillian F.
Hettich, Robert L.
TI Computational Prediction and Experimental Validation of Signal Peptide
Cleavages in the Extracellular Proteome of a Natural Microbial Community
SO JOURNAL OF PROTEOME RESEARCH
LA English
DT Article
DE Mass spectrometry; multidimensional liquid chromatography; shotgun
proteomics; signal peptides; microbial communities
ID TANDEM MASS-SPECTRA; HIDDEN MARKOV MODEL; SHOTGUN PROTEOMICS; SEQUENCES;
GENOMES; SPECTROMETRY; EXPRESSION; PROTEINS; BACTERIA; IDENTIFICATIONS
AB An integrated computational/experimental approach was used to predict and identify signal peptide cleavages among microbial proteins of environmental biofilm communities growing in acid mine drainage (AMD). SignalP-3.0 was employed to computationally query the AMD protein database of >16,000 proteins, which resulted in 1,480 predicted signal peptide cleaved proteins. LC-MS/MS analyses of extracellular (secretome) microbial preparations from different locations and developmental states empirically confirmed 531 of these signal peptide cleaved proteins. The majority of signal-cleavage proteins (58.4%) are annotated to have unknown functions; however, Pfam domain analysis revealed that many may be involved in extracellular functions expected within the AMD system. Examination of the abundances of signal-cleaved proteins across 28 proteomes from biofilms collected over a 4-year period demonstrated a strong correlation with the developmental state of the biofilm. For example, class I cytochromes are abundant in early growth states, whereas cytochrome oxidases from the same organism increase in abundance later in development. These results likely reflect shifts in metabolism that occur as biofilms thicken and communities diversify. In total, these results provide experimental confirmation of proteins that are designed to function in the extreme acidic extracellular environment and will serve as targets for future biochemical analysis.
C1 [Shah, Manesh] Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831 USA.
[Erickson, Brian K.; VerBerkmoes, Nathan C.; Hettich, Robert L.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
[Erickson, Brian K.] Univ Tennessee, Grad Sch Genome Sci & Technol, Knoxville, TN 37830 USA.
[Singer, Steven W.; Thelen, Michael P.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Mueller, Ryan S.; Banfield, Jillian F.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
RP Hettich, RL (reprint author), Oak Ridge Natl Lab, Div Chem Sci, POB 2008 MS-6131, Oak Ridge, TN 37831 USA.
EM hettichrl@ornl.gov
RI Thelen, Michael/C-6834-2008; Thelen, Michael/G-2032-2014; Hettich,
Robert/N-1458-2016
OI Thelen, Michael/0000-0002-2479-5480; Thelen,
Michael/0000-0002-2479-5480; Hettich, Robert/0000-0001-7708-786X
FU Genome Science and Technology Graduate School at UT-Knoxville; DOE
[DOE-AC05-00OR22725]; Division of Chemical Sciences of Biological
Environmental Research, U.S. Department of Energy
FX The authors acknowledge Dr. Vincent Denef for his experimental
acquisition of the 28 biofilm samples and corresponding data sets.
B.K.E. acknowledges graduate stipend support from the Genome Science and
Technology Graduate School at UT-Knoxville. Research funding was
provided by the DOE Genomics:GTL Program. Research sponsored by the
Division of Chemical Sciences of Biological Environmental Research, U.S.
Department of Energy. Oak Ridge National Laboratory is managed by
University of Tennessee-Battelle LLC for the Department of Energy under
contract DOE-AC05-00OR22725.
NR 47
TC 15
Z9 15
U1 0
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1535-3893
J9 J PROTEOME RES
JI J. Proteome Res.
PD MAY
PY 2010
VL 9
IS 5
BP 2148
EP 2159
DI 10.1021/pr900877a
PG 12
WC Biochemical Research Methods
SC Biochemistry & Molecular Biology
GA 592CR
UT WOS:000277353200008
PM 20218729
ER
PT J
AU Zhang, HZ
Brown, RN
Qian, WJ
Monroe, ME
Purvine, SO
Moore, RJ
Gritsenko, MA
Shi, L
Romine, MF
Fredrickson, JK
Pasa-Tolic, L
Smith, RD
Lipton, MS
AF Zhang, Haizhen
Brown, Roslyn N.
Qian, Wei-Jun
Monroe, Matthew E.
Purvine, Samuel O.
Moore, Ronald J.
Gritsenko, Marina A.
Shi, Liang
Romine, Margaret F.
Fredrickson, James K.
Pasa-Tolic, Ljiljana
Smith, Richard D.
Lipton, Mary S.
TI Quantitative Analysis of Cell Surface Membrane Proteins Using
Membrane-Impermeable Chemical Probe Coupled with O-18 Labeling
SO JOURNAL OF PROTEOME RESEARCH
LA English
DT Article
DE cell surface proteins; membrane proteome; O-18 labeling;
membrane-impermeable chemical probe; LC-MS
ID SHEWANELLA-ONEIDENSIS MR-1; ION-EXCHANGE CHROMATOGRAPHY; GRAM-NEGATIVE
BACTERIA; TIME TAG APPROACH; MASS-SPECTROMETRY;
CAPILLARY-ELECTROPHORESIS; ACCURATE MASS; SUBCELLULAR-LOCALIZATION;
MICROBIAL REDUCTION; GEL-ELECTROPHORESIS
AB We report a mass spectrometry-based strategy for quantitative analysis of cell surface membrane proteome changes. The strategy includes enrichment of surface membrane proteins using a membrane-impermeable chemical probe followed by stable isotope O-18 labeling and LC-MS analysis. We applied this strategy for enriching membrane proteins expressed by Shewanella oneidensis MR-1, a Gram-negative bacterium with known metal-reduction capability via extracellular electron transfer between outer membrane proteins and extracellular electron receptors. LC/MS/MS analysis resulted in the identification of about 400 proteins with 79% of them being predicted to be membrane localized. Quantitative aspects of the membrane enrichment were shown by peptide level O-16 and O-18 labeling of proteins from wild-type and mutant cells (generated from deletion of a type II secretion protein, GspD) prior to LC-MS analysis. Using a chemical probe labeled pure protein as an internal standard for normalization, the quantitative data revealed reduced abundances in Delta gspD mutant cells of many outer membrane proteins including the outer membrane c-type cytochromes OmcA and MtrC, in agreement with a previous report that these proteins are substrates of the type II secretion system.
C1 [Lipton, Mary S.] Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA.
Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA.
RP Lipton, MS (reprint author), Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA.
EM mary.lipton@pnl.gov
RI Smith, Richard/J-3664-2012;
OI Smith, Richard/0000-0002-2381-2349; Romine, Margaret/0000-0002-0968-7641
FU U.S. Department of Energy Office of Biological and Environmental
Research (DOE/BER); National Center for Research Resources [RR18522]
FX This research was supported by the U.S. Department of Energy Office of
Biological and Environmental Research (DOE/BER) Genome Sciences and
Environmental Remediation Sciences Programs. Portions of this work used
capabilities developed by the DOE/BER and National Center for Research
Resources (grant RR18522 to R.D.S.). Proteomics analysis was performed
in the Environmental Molecular Sciences Laboratory, a DOE/BER national
scientific user facility located at Pacific Northwest National
Laboratory in Richland, Washington.
NR 64
TC 15
Z9 15
U1 1
U2 15
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1535-3893
J9 J PROTEOME RES
JI J. Proteome Res.
PD MAY
PY 2010
VL 9
IS 5
BP 2160
EP 2169
DI 10.1021/pr9009113
PG 10
WC Biochemical Research Methods
SC Biochemistry & Molecular Biology
GA 592CR
UT WOS:000277353200009
PM 20380418
ER
PT J
AU Shen, YF
Liu, T
Tolic, N
Petritis, BO
Zhao, R
Moore, RJ
Purvine, SO
Camp, DG
Smith, RD
AF Shen, Yufeng
Liu, Tao
Tolic, Nikola
Petritis, Brianne O.
Zhao, Rui
Moore, Ronald J.
Purvine, Samuel O.
Camp, David G., II
Smith, Richard D.
TI Strategy for Degradomic-Peptidomic Analysis of Human Blood Plasma
SO JOURNAL OF PROTEOME RESEARCH
LA English
DT Article
DE degradome; peptidome; blood plasma; tandem mass spectrometry;
high-resolution LC; UStags
ID UNIQUE SEQUENCE TAGS; BIOMARKER DISCOVERY; PROTEOME; CANCER;
BETA-2-MICROGLOBULIN; IDENTIFICATION; TRANSTHYRETIN; PROTEINS; PROTEASE;
BINDING
AB Herein we describe a strategy for degradomic-peptidomic analyses. The human blood peptidome was isolated through application of AC/SEC, which enriched its components by >300-fold. The isolated peptidome components were separated by long column HRLC providing a peak capacity of similar to 300 for species having MWs of up to 20 kDa. The separated species were identified by the FT MS/MS-UStags sequencing method. We identified >200 peptidome components that originated from 29 protein substrates from the blood plasma of a single healthy person. The peptidome peptides identified had MWs range of 0.5-14 kDa and identifications were achieved with extremely low (near zero) false discovery rates through searching the IPI human protein database (similar to 70 000 entries). Some of the peptidome peptides identified have mutations and modifications such as acetylation, acetylhexosamine, amidation, cysteinylation, didehydro, oxidation, and pyro-glu. The capabilities described enable the global analysis of the peptidome peptides to identify degradome targets such as degradome proteases, proteases inhibitors, and other relevant substrates, the cleavage specificities for the degradation of individual substrates, as well as a potential basis for using the various extents of substrate degradation for diagnostic purposes.
C1 [Shen, Yufeng; Liu, Tao; Petritis, Brianne O.; Moore, Ronald J.; Camp, David G., II; Smith, Richard D.] Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99354 USA.
[Tolic, Nikola; Zhao, Rui; Purvine, Samuel O.; Smith, Richard D.] Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99354 USA.
RP Shen, YF (reprint author), Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99354 USA.
EM Yufeng.shen@pnl.gov; rds@pnl.gov
RI Smith, Richard/J-3664-2012; Liu, Tao/A-9020-2013
OI Smith, Richard/0000-0002-2381-2349; Liu, Tao/0000-0001-9529-6550
FU NIH National Center for Research Resources [RR18522]; U.S. Department of
Energy Office of Biological and Environmental Research (DOE/BER); DOE
[DE-AC05-76RLO-1830]
FX Portions of this research were supported by the NIH National Center for
Research Resources (RR18522) and the U.S. Department of Energy Office of
Biological and Environmental Research (DOE/BER). Work was performed in
the Environmental Molecular Science Laboratory, a DOE/BER national
scientific user facility located on the campus of Pacific Northwest
National Laboratory (PNNL) in Richland, Washington. PNNL is a
multiprogram national laboratory operated by Battelle Memorial Institute
for the DOE under contract DE-AC05-76RLO-1830.
NR 45
TC 23
Z9 25
U1 1
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1535-3893
J9 J PROTEOME RES
JI J. Proteome Res.
PD MAY
PY 2010
VL 9
IS 5
BP 2339
EP 2346
DI 10.1021/pr901083m
PG 8
WC Biochemical Research Methods
SC Biochemistry & Molecular Biology
GA 592CR
UT WOS:000277353200025
PM 20377236
ER
PT J
AU Silver, GL
AF Silver, G. L.
TI Estimation of parameters in plutonium solutions
SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
LA English
DT Article
DE Plutonium; Disproportionation; Hydrolysis
ID 1ST HYDROLYSIS CONSTANT; TETRAVALENT PLUTONIUM; DISPROPORTIONATION;
EQUILIBRIUM; EQUATIONS
AB The first hydrolysis constant of tetravalent plutonium can be estimated by two methods that also estimate other solution parameters. The estimates of the hydrolysis constant compare favorably to the traditional values when the ancillary estimates compare favorably to the measurements.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Silver, GL (reprint author), Los Alamos Natl Lab, MS E502,POB 1663, Los Alamos, NM 87545 USA.
EM gsilver@lanl.gov
NR 16
TC 8
Z9 8
U1 1
U2 8
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0236-5731
J9 J RADIOANAL NUCL CH
JI J. Radioanal. Nucl. Chem.
PD MAY
PY 2010
VL 284
IS 2
BP 475
EP 478
DI 10.1007/s10967-010-0501-0
PG 4
WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science &
Technology
SC Chemistry; Nuclear Science & Technology
GA 586LI
UT WOS:000276910000028
ER
PT J
AU Bhatt, V
Friley, P
Lee, J
AF Bhatt, Vatsal
Friley, Paul
Lee, John
TI Integrated energy and environmental systems analysis methodology for
achieving low carbon cities
SO JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY
LA English
DT Article
ID DEVELOPING-COUNTRIES; PANEL ANALYSIS; URBAN FORM; CONSUMPTION;
TRANSPORT; GDP; MANAGEMENT; TECHNOLOGIES; SCENARIOS; CAUSALITY
AB Cities are responsible for nearly 75% of the world's energy consumption; expectedly, about 90% of future growth will occur in urban areas. However, we consider that cities will be at the forefront of implementing groundbreaking technologies and policies, as evidenced in the initiatives taken by many cities here and worldwide to resolve issues in energy and climate change. In addition to affording energy and environmental benefits, investments in energy efficient and renewable technologies have huge potential to boost local economies, as demonstrated by the recent federal allocation of stimulus funding. Inclined to give priority to stopgap measures, many cities tend to regard comprehensive long-term planning as secondary. However, such solutions would bring multiple benefits to the community. The paper showcases an energy and environment systems model to provide a quantitative vision of technology and management strategy options for effectively deploying energy efficiency and renewable energy for reducing the carbon footprint, while sustainably maintaining the energy demands of the community and the servicing environmental infrastructure. We provide results of a case study completed for New York City, to showcase usefulness of long-term planning for achieving low carbon cities. Combined with appropriate stakeholder participation, such a technology explicit bottom-up approach holds the promise of influencing the current energy planning, environmental regulatory regime, including multimedia aspects of carbon control for cities locally and internationally. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3456367]
C1 [Bhatt, Vatsal; Friley, Paul; Lee, John] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Bhatt, V (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM vbhatt@bnl.gov
NR 109
TC 13
Z9 13
U1 1
U2 21
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1941-7012
J9 J RENEW SUSTAIN ENER
JI J. Renew. Sustain. Energy
PD MAY 1
PY 2010
VL 2
IS 3
AR 031012
DI 10.1063/1.3456367
PG 19
WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Energy & Fuels
SC Science & Technology - Other Topics; Energy & Fuels
GA 729BS
UT WOS:000287923200013
ER
PT J
AU Htun, N
Messner, D
Mahajan, D
Nishioka, S
Zhang, XL
AF Htun, Nay
Messner, Dirk
Mahajan, Devinder
Nishioka, Shuzo
Zhang, Xuliang
TI Introduction to Special Topic: Energy Pathways to a Low-Carbon Society
SO JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY
LA English
DT Editorial Material
AB Energy and carbon are at the nexus of climate change, environment, health, and socio-economic development. The imperative to move towards cleaner and renewable energy to reduce greenhouse gas is gaining significant public and private sector support. Reducing carbon in the atmosphere has fast emerged as a major means to achieve this, since carbon content can be measured and hence the pathways can be well-defined. The December 2009 Copenhagen Accord recognized "the scientific view that the increase in global temperature should be below 2 degrees Celsius on the basis of equity and in the context of sustainable development." To achieve this goal, the emerging scenario (e.g., the International Energy Agency (IEA) Report: World Energy Outlook 2009) is that the atmospheric concentration of CO2 be stabilized at around 450 ppm. If global emissions peak in 2015, we estimate that annual reductions in CO2 concentration of up to 5% would be necessary, equivalent to the Kyoto Protocol targets. Delaying reductions beyond the 2015 peak, however, would necessitate more drastic reduction rates that would be very difficult to achieve. To reach the necessary annual reduction in either case, investment in nonfossil energy must be significantly increased. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3459736]
C1 [Htun, Nay] SUNY Stony Brook, Southampton, NY 11968 USA.
[Messner, Dirk] Inst Aleman Desarrollo, Deutsch Inst Entwicklungspolit, German Dev Inst, D-53113 Bonn, Germany.
[Mahajan, Devinder] SUNY Stony Brook, NSF Ctr BioEnergy Res Dev CBERD, Stony Brook, NY 11794 USA.
[Mahajan, Devinder] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Nishioka, Shuzo] Inst Global Environm Strategies, Hayama, Japan.
[Nishioka, Shuzo] Natl Inst Environm Studies, Tsukuba, Ibaraki, Japan.
[Zhang, Xuliang] Tsinghua Univ, Inst Energy Environm & Econ, Beijing 100084, Peoples R China.
RP Htun, N (reprint author), SUNY Stony Brook, Southampton, NY 11968 USA.
EM nay.htun@stonybrook.edu; dirk.messner@die-gdi.de;
dmahajan@notes.cc.sunysb.edu; snishiok@kcf.biglobe.ne.jp;
zhang_xl@tsinghua.edu.cn
NR 19
TC 2
Z9 2
U1 1
U2 17
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1941-7012
J9 J RENEW SUSTAIN ENER
JI J. Renew. Sustain. Energy
PD MAY 1
PY 2010
VL 2
IS 3
AR 030901
DI 10.1063/1.3459736
PG 2
WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Energy & Fuels
SC Science & Technology - Other Topics; Energy & Fuels
GA 729BS
UT WOS:000287923200001
ER
PT J
AU Siegel, NP
Ho, CK
Khalsa, SS
Kolb, GJ
AF Siegel, Nathan P.
Ho, Clifford K.
Khalsa, Siri S.
Kolb, Gregory J.
TI Development and Evaluation of a Prototype Solid Particle Receiver:
On-Sun Testing and Model Validation
SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME
LA English
DT Article
ID HYDROGEN-PRODUCTION; SOLAR; REACTOR; POWER
AB A prototype direct absorption central receiver, called the solid particle receiver (SPR), was built and evaluated on-sun at power levels up to 2.5 MW(th) at Sandia National Laboratories in Albuquerque, NM. The SPR consists of a 6 m tall cavity through which spherical sintered bauxite particles are dropped and directly heated with concentrated solar energy. In principle, the particles can be efficiently heated to a temperature in excess of 900 degrees C, well beyond the stability limit of existing nitrate salt formulations. The heated particles may then be stored in a way analogous to nitrate salt systems, enabling a dispatchable thermal input to power or fuel production cycles. The focus of this current effort was to provide an experimental basis for the validation of computational models that have been created to support improved designs and further development of the solid particle receiver. In this paper, we present information on the design and construction of the solid particle receiver and discuss the development of a computational fluid dynamics model of the prototype. We also present experimental data and model comparisons for on-sun testing of the receiver over a range of input power levels from 1.58-2.51 MW(th). Model validation is performed using a number of metrics including particle velocity, exit temperature, and receiver efficiency. In most cases, the difference between the model predictions and data is less than 10%. [DOI: 10.1115/1.4001146]
C1 [Siegel, Nathan P.; Ho, Clifford K.; Khalsa, Siri S.; Kolb, Gregory J.] Sandia Natl Labs, Dept Solar Technol, Albuquerque, NM 87185 USA.
RP Siegel, NP (reprint author), Sandia Natl Labs, Dept Solar Technol, POB 5800, Albuquerque, NM 87185 USA.
EM npsiege@sandia.gov
FU U.S. Department of Energy [DE-AC04-94AL85000]
FX The authors would like to acknowledge the contributions of the staff at
the NSTTF. Sandia is a multiprogram laboratory operated by Sandia
Corporation, a Lockheed Martin Co. for the U.S. Department of Energy's
National Nuclear Security Administration under Contract No.
DE-AC04-94AL85000.
NR 24
TC 42
Z9 42
U1 2
U2 15
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0199-6231
J9 J SOL ENERG-T ASME
JI J. Sol. Energy Eng. Trans.-ASME
PD MAY
PY 2010
VL 132
IS 2
AR 021008
DI 10.1115/1.4001146
PG 8
WC Energy & Fuels; Engineering, Mechanical
SC Energy & Fuels; Engineering
GA 598LE
UT WOS:000277837800009
ER
PT J
AU Juarez-Arellano, EA
Winkler, B
Bayarjargal, L
Friedrich, A
Milman, V
Kammler, DR
Clark, SM
Yan, JY
Koch-Muller, M
Schroder, F
Avalos-Borja, M
AF Juarez-Arellano, Erick A.
Winkler, Bjoern
Bayarjargal, Lkhamsuren
Friedrich, Alexandra
Milman, Victor
Kammler, Daniel R.
Clark, Simon M.
Yan, Jinyuan
Koch-Mueller, Monika
Schroeder, Florian
Avalos-Borja, Miguel
TI Formation of scandium carbides and scandium oxycarbide from the elements
at high-(P, T) conditions
SO JOURNAL OF SOLID STATE CHEMISTRY
LA English
DT Article
DE Scandium carbides; Scandium oxycarbides; Laser-heated diamond-anvil
cell; Multi-anvil press; Synchrotron; DFT calculations
ID DIAMOND-ANVIL CELL; NEUTRON-DIFFRACTION; PHASE-TRANSITION; LATTICE
PARAMETERS; CARBON; PRESSURES; METALS; OXIDE; SC
AB Synchrotron diffraction experiments with in situ laser heated diamond anvil cells and multi-anvil press synthesis experiments have been performed in order to investigate the reaction of scandium and carbon from the elements at high-(P,T) conditions. It is shown that the reaction is very sensitive to the presence of oxygen. In an oxygen-rich environment the most stable phase is ScO(x)C(y), where for these experiments x=0.39 and y=0.50-0.56. If only a small oxygen contamination is present, we have observed the formation of Sc(3)C(4), Sc(4)C(3) and a new orthorhombic ScC(x) phase. All the phases formed at high pressures and temperatures are quenchable. Experimentally determined elastic properties of the scandium carbides are compared to values obtained by density functional theory based calculations. (C) 2010 Elsevier Inc. All rights reserved.
C1 [Juarez-Arellano, Erick A.] Univ Papaloapan, Tuxtepec 68301, Mexico.
[Juarez-Arellano, Erick A.; Winkler, Bjoern; Bayarjargal, Lkhamsuren; Friedrich, Alexandra; Schroeder, Florian] Goethe Univ Frankfurt, Inst Geowissensch, D-60438 Frankfurt, Germany.
[Milman, Victor] Accelrys, Cambridge, England.
[Kammler, Daniel R.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Clark, Simon M.; Yan, Jinyuan] Univ Calif Berkeley, Lawrence Berkeley Lab, ALS, Berkeley, CA 94720 USA.
[Koch-Mueller, Monika] Geoforschungszentrum Potsdam, Telegrafenberg Sekt 4 1, D-14473 Potsdam, Germany.
[Avalos-Borja, Miguel] Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, Ensenada, Baja California, Mexico.
RP Juarez-Arellano, EA (reprint author), Univ Papaloapan, Circuito Cent 200,Parque Ind, Tuxtepec 68301, Mexico.
EM eajuarez@unpa.edu.mx
RI Schroder, Florian/D-5872-2012; Milman, Victor/M-6117-2015; Clark,
Simon/B-2041-2013
OI Milman, Victor/0000-0003-2258-1347; Juarez-Arellano,
Erick/0000-0003-4844-8317; Clark, Simon/0000-0002-7488-3438
FU Deutsche Forschungsgemeinschaft DFG [Wi-1232, 1236]; CNV-Foundation;
Office of Science, Office of Basic Energy Science, of the U.S.
Department of Energy [DE-AC02-05CH11231]; NSF [EAR 06-49658]; DGAPA-UNAM
[IN-108908]; CONACyT-DAAD PROALMEX; United States Department of Energy
(DoE) [DE-AC04-94AL85000]
FX This research was supported by Deutsche Forschungsgemeinschaft (Project
Wi-1232), in the framework of the DFG-SPP 1236. E.A.J.A thanks the
CONACyT and A.F. thanks the CNV-Foundation for financial support. The
Advanced Light Source is supported by the Director, Office of Science,
Office of Basic Energy Science, of the U.S. Department of Energy under
contract DE-AC02-05CH11231. This research was partially supported by
COMPRES, the Consortium for Materials Properties Research in Earth
Science under NSF Cooperative Agreement EAR 06-49658, by DGAPA-UNAM
grant IN-108908 and by CONACyT-DAAD PROALMEX grant. Sandia is a
multiprogram laboratory operated by Sandia Corporation, a Lockheed
Martin Company, for the United States Department of Energy (DoE) under
Contract no. DE-AC04-94AL85000.
NR 46
TC 3
Z9 3
U1 2
U2 14
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0022-4596
J9 J SOLID STATE CHEM
JI J. Solid State Chem.
PD MAY
PY 2010
VL 183
IS 5
BP 975
EP 983
DI 10.1016/j.jssc.2010.02.019
PG 9
WC Chemistry, Inorganic & Nuclear; Chemistry, Physical
SC Chemistry
GA 596HJ
UT WOS:000277675500001
ER
PT J
AU Stavila, V
Her, JH
Zhou, W
Hwang, SJ
Kim, C
Ottley, LAM
Udovic, TJ
AF Stavila, Vitalie
Her, Jae-Hyuk
Zhou, Wei
Hwang, Son-Jong
Kim, Chul
Ottley, Leigh Anna M.
Udovic, Terrence J.
TI Probing the structure, stability and hydrogen storage properties of
calcium dodecahydro-closo-dodecaborate
SO JOURNAL OF SOLID STATE CHEMISTRY
LA English
DT Article
DE Calcium dodedecahydro-closo-dodecaborate; Hydrogen storage; Metal
borohydrides; X-ray and neutron techniques; Density functional theory
ID WELL-CRYSTALLIZED MG(BH4)(2); METAL-BOROHYDRIDES; NEUTRON-SCATTERING; H
SYSTEM; ANIONS; REVERSIBILITY; CA(BH4)(2); COMPLEXES; BEHAVIOR; LIBH4
AB Calcium borohydride can reversibly store up to 9.6 wt% hydrogen; however, the material displays poor cyclability, generally associated with the formation of stable intermediate species. In an effort to understand the role of such intermediates on the hydrogen storage properties of Ca(BH(4))(2), calcium dodecahydro-closo-dodecaborate was isolated and characterized by diffraction and spectroscopic techniques. The crystal structure of CaB(12)H(12) was determined from powder XRD data and confirmed by DFT and neutron vibrational spectroscopy studies. Attempts to dehydrogenate/hydrogenate mixtures of CaB(12)H(12) and CaH(2) were made under conditions known to favor partial reversibility in calcium borohydride. However, up to 670 K no notable formation of Ca(BH(4))(2) (during hydrogenation) or CaB(6) (during dehydrogenation) occurred. It was demonstrated that the stability of CaB(12)H(12) can be significantly altered using CaH(2) as a destabilizing agent to favor the hydrogen release. Published by Elsevier Inc.
C1 [Stavila, Vitalie] Sandia Natl Labs, Livermore, CA 94551 USA.
[Ottley, Leigh Anna M.] Sandia Natl Labs, Albuquerque, NM 87106 USA.
[Her, Jae-Hyuk; Zhou, Wei; Udovic, Terrence J.] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Her, Jae-Hyuk; Zhou, Wei] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA.
[Hwang, Son-Jong; Kim, Chul] CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA.
RP Stavila, V (reprint author), Sandia Natl Labs, Livermore, CA 94551 USA.
EM vnstavi@sandia.gov
RI Stavila, Vitalie/F-4188-2010; Zhou, Wei/C-6504-2008; Stavila,
Vitalie/B-6464-2008
OI Zhou, Wei/0000-0002-5461-3617; Stavila, Vitalie/0000-0003-0981-0432
FU US Department of Energy, Office of Energy Efficiency and Renewable
Energy [DE-AC04-94AL85000, DE-AI-01-05EE11104, DE-AI-01-05EE11105];
National Science Foundation (NSF) [9724240]; NSF [DMR-0520565]
FX The authors would like to acknowledge the many valuable suggestions made
by Drs. Ewa Ronnebro, Eric Majzoub, Timothy Boyle and Leonard Klebanoff.
We are grateful to Dr. Satish S. Jalisatgi for generously providing the
Li2B12H12 and
K2B12H12 samples and to Jeff Chames for
help with the SEM/EDX experiments. We gratefully acknowledge financial
support from the US Department of Energy, Office of Energy Efficiency
and Renewable Energy, in the Hydrogen, Fuel Cells & Infrastructure
Technologies Program under Contract nos. DE-AC04-94AL85000,
DE-AI-01-05EE11104, and DE-AI-01-05EE11105. The NMR facility at Caltech
was supported by the National Science Foundation (NSF) under Grant no.
9724240 and partially supported by the MRSEC Program of the NSF under
Award Number DMR-0520565.
NR 41
TC 35
Z9 35
U1 0
U2 20
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0022-4596
J9 J SOLID STATE CHEM
JI J. Solid State Chem.
PD MAY
PY 2010
VL 183
IS 5
BP 1133
EP 1140
DI 10.1016/j.jssc.2010.03.026
PG 8
WC Chemistry, Inorganic & Nuclear; Chemistry, Physical
SC Chemistry
GA 596HJ
UT WOS:000277675500022
ER
PT J
AU Boada, R
Laguna-Marco, MA
Gallastegui, JA
Castro, GR
Chaboy, J
AF Boada, Roberto
Laguna-Marco, Maria Angeles
Ander Gallastegui, Jon
Castro, German R.
Chaboy, Jesus
TI X-ray magnetic circular dichroism measurements using an X-ray phase
retarder on the BM25 A-SpLine beamline at the ESRF
SO JOURNAL OF SYNCHROTRON RADIATION
LA English
DT Article
DE X-ray magnetic circular dichroism; X-ray phase retarder; polarization
tunability; magnetic polarization
ID DIFFRACTION; PLATES; ABSORPTION; CRYSTAL
AB Circularly polarized X-rays produced by a diamond X-ray phase retarder of thickness 0.5 mm in the Laue transmission configuration have been used for recording X-ray magnetic circular dichroism (XMCD) on the bending-magnet beamline BM25A (SpLine) at the ESRF. Field reversal and helicity reversal techniques have been used to carry out the measurements. The performance of the experimental set-up has been demonstrated by recording XMCD in the energy range from 7 to 11 keV. (C) 2010 International Union of Crystallography Printed in Singapore - all rights reserved
C1 [Boada, Roberto; Chaboy, Jesus] Univ Zaragoza, Inst Ciencia Mat Aragon, Consejo Super Invest Cient, CSIC, E-50009 Zaragoza, Spain.
[Boada, Roberto; Chaboy, Jesus] Univ Zaragoza, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain.
[Laguna-Marco, Maria Angeles] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Ander Gallastegui, Jon; Castro, German R.] Consejo Super Invest Cient, Inst Ciencia Mat Madrid, Madrid 28049, Spain.
[Ander Gallastegui, Jon; Castro, German R.] European Synchrotron Radiat Facil, Spanish CRG Beamline, SpLine, F-38043 Grenoble, France.
RP Boada, R (reprint author), Univ Zaragoza, Inst Ciencia Mat Aragon, Consejo Super Invest Cient, CSIC, E-50009 Zaragoza, Spain.
EM rboada@unizar.es
RI Laguna-Marco, M. A./G-8042-2011; Boada, Roberto/H-5349-2015; Castro,
German/H-6679-2015
OI Laguna-Marco, M. A./0000-0003-4069-0395; Boada,
Roberto/0000-0003-4857-8402; Castro, German/0000-0003-4251-3245
FU Spainsh CICYT [CICYT-MAT2008-06542-C04]; Ministerio de Ciencia e
Innovacion of Spain; Consejo Superior de Investigaciones Cientificas
FX This work was partially supported by a Spanish CICYT-MAT2008-06542-C04
grant. MALM and RB acknowledge the Ministerio de Ciencia e Innovacion of
Spain for their Postdoctoral and PhD grants, respectively. We also
acknowledge the Spanish Ministerio de Ciencia e Innovacion and Consejo
Superior de Investigaciones Cientificas for financial support and for
providing synchrotron radiation facilities access, and we would like to
thank SpLine staff and BL39XU staff for their assistance during the
proposals 25-01-643 and 25-01-678, and 2008A1051 and 2008B1753,
respectively. We are indebted to M. Suzuki and N. Kawamura for many
enlightening discussions.
NR 26
TC 2
Z9 2
U1 0
U2 5
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0909-0495
J9 J SYNCHROTRON RADIAT
JI J. Synchrot. Radiat.
PD MAY
PY 2010
VL 17
BP 308
EP 313
DI 10.1107/S0909049510005881
PN 3
PG 6
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA 584WW
UT WOS:000276785600002
PM 20400827
ER
PT J
AU Sandy, AR
Narayanan, S
Sprung, M
Su, JD
Evans-Lutterodt, K
Isakovic, AF
Stein, A
AF Sandy, A. R.
Narayanan, S.
Sprung, M.
Su, J. -D.
Evans-Lutterodt, K.
Isakovic, A. F.
Stein, A.
TI Kinoform optics applied to X-ray photon correlation spectroscopy
SO JOURNAL OF SYNCHROTRON RADIATION
LA English
DT Article
DE focusing hard X-rays; kinoform refractive optics; X-ray photon
correlation spectroscopy (XPCS); X-ray intensity fluctuation
spectroscopy (XIFS); X-ray speckle
ID REFRACTIVE LENSES; SCATTERING; DIAMOND; DESIGN; FABRICATION; SILICON;
BEAM
AB Moderate-demagnification higher-order silicon kinoform focusing lenses have been fabricated to facilitate small-angle X-ray photon correlation spectroscopy (XPCS) experiments. The geometric properties of such lenses, their focusing performance and their applicability for XPCS measurements are described. It is concluded that one-dimensional vertical X-ray focusing via silicon kinoform lenses significantly increases the usable coherent flux from third-generation storage-ring light sources for small-angle XPCS experiments. (C) 2010 International Union of Crystallography Printed in Singapore - all rights reserved
C1 [Sandy, A. R.; Narayanan, S.; Sprung, M.; Su, J. -D.] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA.
[Evans-Lutterodt, K.; Isakovic, A. F.] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
[Stein, A.] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
RP Sandy, AR (reprint author), Argonne Natl Lab, Xray Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM asandy@anl.gov
RI Isakovic, Abdel/A-7430-2009
OI Isakovic, Abdel/0000-0003-1779-4209
FU US Department of Energy, Office of Basic Energy Sciences
[DE-AC02-98CH10886, DE-AC02-06CH11357]
FX We acknowledge the expert technical assistance of Raymond Ziegler and
helpful conversations with Professors Larry Lurio, Simon Mochrie and
Mark Sutton. Research carried out in part at the Center for Functional
Nanomaterials, Brookhaven National Laboratory, which is supported by the
US Department of Energy, Office of Basic Energy Sciences, under Contract
No. DE-AC02-98CH10886. Use of the Advanced Photon Source at Argonne
National Laboratory was supported by the US Department of Energy, Office
of Science, Office of Basic Energy Sciences, under Contract No.
DE-AC02-06CH11357.
NR 24
TC 5
Z9 5
U1 2
U2 13
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0909-0495
J9 J SYNCHROTRON RADIAT
JI J. Synchrot. Radiat.
PD MAY
PY 2010
VL 17
BP 314
EP 320
DI 10.1107/S0909049510004322
PN 3
PG 7
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA 584WW
UT WOS:000276785600003
PM 20400828
ER
PT J
AU Honnicke, MG
Huang, XR
Keister, JW
Kodituwakku, CN
Cai, YQ
AF Honnicke, Marcelo Goncalves
Huang, Xianrong
Keister, Jeffrey W.
Kodituwakku, Chaminda Nalaka
Cai, Yong Q.
TI Tracing X-rays through an L-shaped laterally graded multilayer mirror: a
synchrotron application
SO JOURNAL OF SYNCHROTRON RADIATION
LA English
DT Article
DE X-ray optics; X-ray mirrors; ray tracing; multilayer simulation; high
resolution
ID INTERFACE ROUGHNESS; ENERGY RESOLUTION; SCATTERING; DIFFRACTION;
SURFACES; MONOCHROMATORS; PERFORMANCE; RADIATION
AB A theoretical model to trace X-rays through an L-shaped (nested or Montel Kirkpatrick-Baez mirrors) laterally graded multilayer mirror to be used in a synchrotron application is presented. The model includes source parameters (size and divergence), mirror figure (parabolic and elliptic), multilayer parameters (reflectivity, which depends on layer material, thickness and number of layers) and figure errors (slope error, roughness, layer thickness fluctuation Delta d/d and imperfection in the corners). The model was implemented through MATLAB/OCTAVE scripts, and was employed to study the performance of a multilayer mirror designed for the analyzer system of an ultrahigh-resolution inelastic X-ray scattering spectrometer at National Synchrotron Light Source II. The results are presented and discussed. (C) 2010 International Union of Crystallography Printed in Singapore - all rights reserved
C1 [Honnicke, Marcelo Goncalves; Huang, Xianrong; Keister, Jeffrey W.; Kodituwakku, Chaminda Nalaka; Cai, Yong Q.] Brookhaven Natl Lab, Natl Synchrotron Light Source 2, Brookhaven, NY 11973 USA.
RP Honnicke, MG (reprint author), Brookhaven Natl Lab, Natl Synchrotron Light Source 2, Brookhaven, NY 11973 USA.
EM mhonnicke@bnl.gov
RI Cai, Yong/C-5036-2008; Honnicke, Marcelo/I-8624-2012
OI Cai, Yong/0000-0002-9957-6426;
FU US Department of Energy, Office of Science, Office of Basic Energy
Sciences [DE-AC-02-98CH10886]
FX This work was supported by the US Department of Energy, Office of
Science, Office of Basic Energy Sciences, under contract No.
DE-AC-02-98CH10886.
NR 31
TC 12
Z9 12
U1 0
U2 1
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0909-0495
J9 J SYNCHROTRON RADIAT
JI J. Synchrot. Radiat.
PD MAY
PY 2010
VL 17
BP 352
EP 359
DI 10.1107/S0909049510004383
PN 3
PG 8
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA 584WW
UT WOS:000276785600008
PM 20400833
ER
PT J
AU Xiao, XH
Liu, HZ
Wang, LH
De Carlo, F
AF Xiao, Xianghui
Liu, Haozhe
Wang, Luhong
De Carlo, Francesco
TI Density measurement of samples under high pressure using synchrotron
microtomography and diamond anvil cell techniques
SO JOURNAL OF SYNCHROTRON RADIATION
LA English
DT Article
DE high pressure; equation of state; microtomography; incomplete data
ID HIGH-TEMPERATURE; LIQUID; DIFFRACTION
AB Accurate mass density information is critical in high-pressure studies of materials. It is, however, very difficult to measure the mass densities of amorphous materials under high pressure with a diamond anvil cell (DAC). Employing tomography to measure mass density of amorphous samples under high pressure in a DAC has recently been reported. In reality, the tomography data of a sample in a DAC suffers from not only noise but also from the missing angle problem owing to the geometry of the DAC. An algorithm that can suppress noise and overcome the missing angle problem has been developed to obtain accurate mass density information from such ill-posed data. The validity of the proposed methods was supported with simulations. (C) 2010 International Union of Crystallography Printed in Singapore - all rights reserved
C1 [Xiao, Xianghui; De Carlo, Francesco] Argonne Natl Lab, Adv Photon Source, XOR, Argonne, IL 60439 USA.
[Liu, Haozhe; Wang, Luhong] Harbin Inst Technol, Acad Fundamental & Interdisciplinary Sci, Natl Ctr Sci Res, Harbin 150080, Peoples R China.
RP Xiao, XH (reprint author), Argonne Natl Lab, Adv Photon Source, XOR, Argonne, IL 60439 USA.
EM xhxiao@aps.anl.gov
RI Liu, Haozhe/E-6169-2011; Wang, Luhong/E-6234-2011
FU US Department of Energy, Office of Science, Office of Basic Energy
Sciences [DE-AC02-06CH11357]; National Natural Science Foundation of
China [10975042]
FX Use of the Advanced Photon Source was supported by the US Department of
Energy, Office of Science, Office of Basic Energy Sciences, under
Contract No. DE-AC02-06CH11357. This work was partially supported by the
National Natural Science Foundation of China (No. 10975042).
NR 19
TC 5
Z9 6
U1 0
U2 9
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0909-0495
J9 J SYNCHROTRON RADIAT
JI J. Synchrot. Radiat.
PD MAY
PY 2010
VL 17
BP 360
EP 366
DI 10.1107/S0909049510008502
PN 3
PG 7
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA 584WW
UT WOS:000276785600009
PM 20400834
ER
PT J
AU Ravel, B
Scorzato, C
Siddons, DP
Kelly, SD
Bare, SR
AF Ravel, B.
Scorzato, C.
Siddons, D. P.
Kelly, S. D.
Bare, S. R.
TI Simultaneous XAFS measurements of multiple samples
SO JOURNAL OF SYNCHROTRON RADIATION
LA English
DT Article
DE XAFS; ionization chamber; in situ; catalysis
ID X-RAY-ABSORPTION; SPECTROSCOPY; EXAFS
AB A four-channel ionization chamber has been designed, constructed and tested. This ionization chamber allows X-ray absorption spectra to be collected in transmission from up to four samples simultaneously. This results in spectra that are free of systematic uncertainty in relative energy alignment introduced by scan-to-scan stability of the monochromator or of numerical uncertainty associated with a post-processing alignment algorithm, allowing, in a single shot, an absolute measure of edge shift between four samples of different valence. As four samples can be measured in parallel, the time expended over the course of an experiment to cycle the measurement environment between its rest state and the measurement condition is substantially reduced. The ionization chamber is simple in design and could be implemented at virtually any XAFS beamline with a horizontal fan of radiation such as that provided by a bend magnet or wiggler. (C) 2010 International Union of Crystallography Printed in Singapore - all rights reserved
C1 [Ravel, B.] NIST, Gaithersburg, MD 20899 USA.
[Scorzato, C.] Lab Nacl Luz Sincrotron, Campinas, SP, Brazil.
[Siddons, D. P.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Kelly, S. D.] EXAFS Anal, Bolingbrook, IL 60440 USA.
[Bare, S. R.] Honeywell Co, UOP LLC, Des Plaines, IL 60017 USA.
RP Ravel, B (reprint author), NIST, Gaithersburg, MD 20899 USA.
EM bravel@bnl.gov
FU US Department of Energy [DE-AC02-98CH10886]
FX Use of the National Synchrotron Light Source, Brookhaven National
Laboratory, was supported by the US Department of Energy, Office of
Science, Office of Basic Energy Sciences, under Contract No.
DE-AC02-98CH10886. We thank W. Rao, A. Lanzirotti, J. Kirkland, K.
Pandya, C. Jaye and R. Tappero (all of whom are staff at various NSLS
beamlines) for lending us enough equipment to make this experiment work
the first time.
NR 13
TC 5
Z9 5
U1 1
U2 9
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0909-0495
J9 J SYNCHROTRON RADIAT
JI J. Synchrot. Radiat.
PD MAY
PY 2010
VL 17
BP 380
EP 385
DI 10.1107/S0909049510006230
PN 3
PG 6
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA 584WW
UT WOS:000276785600012
PM 20400837
ER
PT J
AU Woicik, JC
Ravel, B
Fischer, DA
Newburgh, WJ
AF Woicik, J. C.
Ravel, B.
Fischer, D. A.
Newburgh, W. J.
TI Performance of a four-element Si drift detector for X-ray absorption
fine-structure spectroscopy: resolution, maximum count rate, and
dead-time correction with incorporation into the ATHENA data analysis
software
SO JOURNAL OF SYNCHROTRON RADIATION
LA English
DT Article
DE Si drift detector; X-ray absorption fine-structure spectroscopy;
dead-time correction; ATHENA data analysis software
ID SYNCHROTRON RAD. 11; NONLINEAR CONDITIONS; FLUORESCENCE MODE; EXAFS DATA
AB The performance of a four-element Si drift detector for energy-dispersive fluorescence-yield X-ray absorption fine-structure measurements is reported, operating at the National Institute of Standards and Technology beamline X23A2 at the National Synchrotron Light Source. The detector can acquire X-ray absorption fine-structure spectra with a throughput exceeding 4 x 10(5) counts per second per detector element (> 1.6 x 10(6) total counts per second summed over all four channels). At this count rate the resolution at 6 keV is approximately 220 eV, which adequately resolves the Mn K alpha and K beta fluorescence lines. Accurate dead-time correction is demonstrated, and it has been incorporated into the ATHENA data analysis program. To maintain counting efficiency and high signal to background, it is suggested that the incoming count rate should not exceed similar to 70% of the maximum throughput. (C) 2010 International Union of Crystallography Printed in Singapore - all rights reserved
C1 [Woicik, J. C.; Ravel, B.; Fischer, D. A.] NIST, Gaithersburg, MD 20899 USA.
[Newburgh, W. J.] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
RP Woicik, JC (reprint author), NIST, Gaithersburg, MD 20899 USA.
EM woicik@bnl.gov
FU US Department of Energy [DE-AC02-98CH10886]; National Institute of
Standards and Technology
FX The authors thank Pavel Rehak for useful discussions and Igor Levin for
the SrMnO3 sample. Data were collected at the National
Synchrotron Light Source. Use of the National Synchrotron Light Source,
Brookhaven National Laboratory, was supported by the US Department of
Energy, Office of Science, Office of Basic Energy Sciences, under
Contract No. DE-AC02-98CH10886. Additional support was provided by the
National Institute of Standards and Technology.
NR 14
TC 23
Z9 23
U1 0
U2 12
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0909-0495
J9 J SYNCHROTRON RADIAT
JI J. Synchrot. Radiat.
PD MAY
PY 2010
VL 17
BP 409
EP 413
DI 10.1107/S0909049510009064
PN 3
PG 5
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA 584WW
UT WOS:000276785600016
PM 20400841
ER
PT J
AU Said, AH
Shastri, SD
AF Said, A. H.
Shastri, S. D.
TI Silicon saw-tooth refractive lens for high-energy X-rays made using a
diamond saw
SO JOURNAL OF SYNCHROTRON RADIATION
LA English
DT Article
DE saw-tooth lenses; refractive lenses; high-energy X-rays; X-ray optics
ID OPTICS
AB Silicon is a material well suited for refractive lenses operating at high X-ray energies (>50 keV), particularly if implemented in a single-crystal form to minimize small-angle scattering. A single-crystal silicon saw-tooth refractive lens, fabricated by a dicing process using a thin diamond wheel, was tested with 115 keV X-rays, giving an ideal 17 mm line focus width in a long focal length, 2: 1 ratio demagnification geometry, with a source-to-focus distance of 58.5 m. The fabrication is simple, using resources typically available at any synchrotron facility's optics shop. (C) 2010 International Union of Crystallography Printed in Singapore - all rights reserved
C1 [Said, A. H.; Shastri, S. D.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Shastri, SD (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM shastri@aps.anl.gov
FU US Department of Energy [DE-AC02-06CH11357]
FX The technical assistance provided by the APS Optics Fabrication and
Metrology Group, in particular that of R. Khachatryan and M. Wieczorek,
is appreciated. Use of the APS at Argonne National Laboratory was
supported by the US Department of Energy, Office of Science, Office of
Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
NR 11
TC 6
Z9 6
U1 1
U2 2
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0909-0495
J9 J SYNCHROTRON RADIAT
JI J. Synchrot. Radiat.
PD MAY
PY 2010
VL 17
BP 425
EP 427
DI 10.1107/S0909049510003584
PN 3
PG 3
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA 584WW
UT WOS:000276785600018
PM 20400843
ER
PT J
AU Suzuki, Y
Levine, JB
Migliori, A
Garrett, JD
Kaner, RB
Fanelli, VR
Betts, JB
AF Suzuki, Yoko
Levine, Jonathan B.
Migliori, Albert
Garrett, Jim D.
Kaner, Richard B.
Fanelli, Victor R.
Betts, Jonathan B.
TI Rhenium diboride's monocrystal elastic constants, 308 to 5 K
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID TEMPERATURE-DEPENDENCE; CRYSTALS; REB2; PRESSURE; MODULUS
AB The five independent moduli required to construct the complete monocrystal elastic modulus tensor of the hexagonal-symmetry superhard compound ReB2 were measured from 308 to 5 K using resonant ultrasound spectroscopy on a special-texture polycrystal. This is possible because, confirmed by X-ray diffraction, the specimen measured was composed of grains with hexagonal axes parallel so that its polycrystal elastic response is identical to a monocrystal and because hexagonal-symmetry solids are elastically isotropic in the plane perpendicular to the hexagonal axis. Along the hexagonal (c) axis, C-33(0)=1021 GPa, nearly equal to C-11 of diamond, and consistent with the superhard properties. However, in the (softer) isotropic plane, C-11(0)=671 GPa, much lower than diamond. The changes of C-ij with temperature are very small and smooth. The Debye temperature was computed to be 738 K, and using a high-temperature approximation, the Gruneisen parameter is gamma=1.7. (C) 2010 Acoustical Society of America. [DOI: 10.1121/1.3372629]
C1 [Suzuki, Yoko; Migliori, Albert; Fanelli, Victor R.; Betts, Jonathan B.] Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA.
[Levine, Jonathan B.; Kaner, Richard B.] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA.
[Levine, Jonathan B.; Kaner, Richard B.] Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USA.
[Garrett, Jim D.] McMaster Univ, Brockhouse Inst Mat Res, Hamilton, ON L854M1, Canada.
RP Suzuki, Y (reprint author), Los Alamos Natl Lab, Natl High Magnet Field Lab, POB 1663, Los Alamos, NM 87545 USA.
EM yoko@lanl.gov
RI Fanelli, Victor/A-4375-2015
FU National Science Foundation [DMR 0805357]; State of Florida; National
Nuclear Security Administration of the U. S. Department of Energy
FX We thank Brian Scott for his help with the X-ray measurements and
analysis. This research was performed under the auspices of the National
Science Foundation (Grant No. DMR 0805357), the State of Florida, and
the National Nuclear Security Administration of the U. S. Department of
Energy.
NR 33
TC 8
Z9 8
U1 0
U2 10
PU ACOUSTICAL SOC AMER AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0001-4966
J9 J ACOUST SOC AM
JI J. Acoust. Soc. Am.
PD MAY
PY 2010
VL 127
IS 5
BP 2797
EP 2801
DI 10.1121/1.3372629
PG 5
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 595NG
UT WOS:000277617300019
PM 21117729
ER
PT J
AU Wereszczak, AA
Harper, DC
Duty, CE
Patel, P
AF Wereszczak, Andrew A.
Harper, David C.
Duty, Chad E.
Patel, Parimal
TI Glass Strengthening Via High-Intensity Plasma-Arc Heating
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID DYNAMIC FATIGUE; FLOAT GLASS; COATINGS
AB A high-intensity plasma-arc lamp was used to irradiate the surface of soda-lime silicate glass tiles to determine whether an increase in strength could be achieved. The lamp has a maximum power density of 3500 W/cm2, a processing area of 2 cm x 10 cm, a broad-spectrum energy distribution between 0.2 and 1.4 mu m, and was controlled to unidirectionally sweep across 50 mm2 tiles at a constant speed of 8 mm/s. Ring-on-ring (RoR) equibiaxial flexure and four-point unidirectional flexure testings of entire tiles were used to measure and compare uncensored and unimodal Weibull failure stress distributions of treated and untreated glass. Even under nonoptimized processing conditions, the RoR Weibull characteristic failure stress increased by approximately 25% and the four-point-bend Weibull characteristic failure stress increased by approximately 65%. Additionally, the failure stresses of the weakest samples of the heat-treated glass were significantly higher than those of the untreated glass. Strengthening was due to a fire-polishing-like mechanism. The arc-lamp heat treatment caused the location of the strength-limiting flaws in the four-point-bend tiles to change; namely, failure initiation occurred on the gauge section surface for the treated glass, whereas it occurred at a gauge section edge for the untreated glass. Arc-lamp heat treatment is attractive not only because it provides strengthening, but because it can (noncontact) process large amounts of glass quickly and inexpensively, and is a process that either a glass manufacturer or an end-user can readily use.
C1 [Wereszczak, Andrew A.] Oak Ridge Natl Lab, Ceram Sci & Technol Grp, Oak Ridge, TN 37831 USA.
[Harper, David C.; Duty, Chad E.] Oak Ridge Natl Lab, Mat Proc Grp, Oak Ridge, TN 37831 USA.
[Patel, Parimal] USA, Res Lab, Survivabil Mat Branch, Aberdeen Proving Ground, MD 21005 USA.
RP Wereszczak, AA (reprint author), Oak Ridge Natl Lab, Ceram Sci & Technol Grp, Oak Ridge, TN 37831 USA.
EM wereszczakaa@ornl.gov
RI Wereszczak, Andrew/I-7310-2016
OI Wereszczak, Andrew/0000-0002-8344-092X
FU U.S. Army Tank-Automotive Research, Development and Engineering Center
[DE-AC-00OR22725]; U.S. Department of Energy [DE-AC05-00OR22725]
FX Research performed under Work For Others funded by U.S. Army
Tank-Automotive Research, Development and Engineering Center, under
contract DE-AC-00OR22725 with UT-Battelle, LLC.; This submission was
produced by a contractor of the U.S. Government under contract
DE-AC05-00OR22725 with the U.S. Department of Energy. The U. S.
Government retains, and the publisher, by accepting this submission for
publication, acknowledges that the U.S. Government retains, a
nonexclusive, paid-up, irrevocable, worldwide license to publish or
reproduce the published form of this submission, or allow others to do
so, for U. S. Government purposes.
NR 22
TC 1
Z9 1
U1 1
U2 7
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0002-7820
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD MAY
PY 2010
VL 93
IS 5
BP 1256
EP 1259
DI 10.1111/j.1551-2916.2009.03553.x
PG 4
WC Materials Science, Ceramics
SC Materials Science
GA 588PC
UT WOS:000277083500013
ER
PT J
AU Suratwala, TI
Feit, MD
Steele, WA
AF Suratwala, Tayyab I.
Feit, Michael D.
Steele, William A.
TI Toward Deterministic Material Removal and Surface Figure During Fused
Silica Pad Polishing
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID CMP; PARTICLES; GLASS
AB The material removal and surface figure after ceria pad polishing of fused silica glass have been measured and analyzed as a function of kinematics, loading conditions, and polishing time. Also, the friction at the workpiece/lap interface, the slope of the workpiece relative to the lap plane, and lap viscoelastic properties have been measured and correlated to material removal. The results show that the relative velocity between the workpiece and the lap (i.e., the kinematics) and the pressure distribution determine the spatial and temporal material removal, and hence the final surface figure of the workpiece. In cases where the applied loading and relative velocity distribution over the workpiece are spatially uniform, a significant nonuniformity in material removal, and thus surface figure, is observed. This is due to a nonuniform pressure distribution resulting from: (1) a moment caused by a pivot point and interface friction forces; (2) viscoelastic relaxation of the polyurethane lap; and (3) a physical workpiece/lap interface mismatch. Both the kinematics and these nonuniformities in the pressure distribution are quantitatively described, and have been combined to develop a spatial and temporal model, based on Preston's equation, called Surface Figure or SurF. The surface figure simulations are consistent with the experiment for a wide variety of polishing conditions. This study is an important step toward deterministic full-aperture polishing, allowing optical glass fabrication to be performed in a more repeatable, less iterative, and hence more economical manner.
C1 [Suratwala, Tayyab I.; Feit, Michael D.; Steele, William A.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Suratwala, TI (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM suratwala1@llnl.gov
RI Feit, Michael/A-4480-2009; Suratwala, Tayyab/A-9952-2013
OI Suratwala, Tayyab/0000-0001-9086-1039
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]
FX This work was financially supported by the auspices of the U.S.
Department of Energy by Lawrence Livermore National Laboratory under
contract DE-AC52-07NA27344 under the LDRD program.
NR 23
TC 24
Z9 27
U1 0
U2 13
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0002-7820
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD MAY
PY 2010
VL 93
IS 5
BP 1326
EP 1340
DI 10.1111/j.1551-2916.2010.03607.x
PG 15
WC Materials Science, Ceramics
SC Materials Science
GA 588PC
UT WOS:000277083500023
ER
PT J
AU Groenewold, GS
de Jong, WA
Oomens, J
Van Stipdonk, MJ
AF Groenewold, Gary. S.
de Jong, Wibe A.
Oomens, Jos
Van Stipdonk, Michael J.
TI Variable Denticity in Carboxylate Binding to the Uranyl Coordination
Complexes
SO JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
LA English
DT Article; Proceedings Paper
CT Asilomar Conference on Ion Spectroscopy
CY OCT 16-20, 2009
CL Pacific Grove, CA
ID ENERGY-ADJUSTED PSEUDOPOTENTIALS; COLLISION-INDUCED DISSOCIATION;
RESONANCE MASS-SPECTROMETRY; GAS-PHASE; INFRARED-SPECTROSCOPY;
ELECTROSPRAY-IONIZATION; AQUEOUS-SOLUTIONS; VIBRATIONAL SPECTROSCOPY;
PARAMETER SETS; RAMAN-SPECTRA
AB Tris-carboxylate complexes of uranyl [UO(2)](2+) with acetate and benzoate were generated using electrospray ionization mass spectrometry, and then isolated in a Fourier transform ion cyclotron resonance mass spectrometer. Wavelength-selective infrared multiple photon dissociation (IRMPD) of the tris-acetato uranyl anion resulted in a redox elimination of an acetate radical, which was used to generate an IR spectrum that consisted of six prominent absorption bands. These were interpreted with the aid of density functional theory calculations in terms of symmetric and antisymmetric -CO(2) stretches of the monodentate and bidentate acetate, CH(3) bending and umbrella vibrations, and a uranyl O-U-O asymmetric stretch. The comparison of the calculated and measured IR spectra indicated that the predominant conformer of the tris-acetate complex contained two acetate ligands bound in a bidentate fashion, while the third acetate was monodentate. In similar fashion, the tris-benzoate uranyl anion was formed and photodissociated by loss of a benzoate radical, enabling measurement of the infrared spectrum that was in close agreement with that calculated for a structure containing one monodentate and two bidentate benzoate ligands. (J Am Soc Mass Spectrom 2010, 21, 719-727) (C) 2010. Published by Elsevier Inc. on behalf of American Society for Mass Spectrometry
C1 [Groenewold, Gary. S.] Idaho Natl Lab, Dept Chem, Idaho Falls, ID 83415 USA.
[de Jong, Wibe A.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Oomens, Jos] EURATOM, FOM, Inst Plasmafys, Nieuwegein, Netherlands.
[Oomens, Jos] Univ Amsterdam, Amsterdam, Netherlands.
[Van Stipdonk, Michael J.] Wichita State Univ, Dept Chem, Wichita, KS 67208 USA.
RP Groenewold, GS (reprint author), Idaho Natl Lab, Dept Chem, PO Bx 1625,MS 2208, Idaho Falls, ID 83415 USA.
EM gary.groenewold@inl.gov
RI DE JONG, WIBE/A-5443-2008; Oomens, Jos/F-9691-2015
OI DE JONG, WIBE/0000-0002-7114-8315;
NR 64
TC 34
Z9 34
U1 2
U2 37
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1044-0305
J9 J AM SOC MASS SPECTR
JI J. Am. Soc. Mass Spectrom.
PD MAY
PY 2010
VL 21
IS 5
BP 719
EP 727
DI 10.1016/j.jasms.2010.01.021
PG 9
WC Chemistry, Analytical; Chemistry, Physical; Spectroscopy
SC Chemistry; Spectroscopy
GA 587BX
UT WOS:000276963000006
PM 20188585
ER
PT J
AU Lee, CS
Lemberg, JA
Cho, DG
Roh, JY
Ritchie, RO
AF Lee, C. S.
Lemberg, J. A.
Cho, D. G.
Roh, J. Y.
Ritchie, R. O.
TI Mechanical properties of Si3N4-Al2O3 FGM joints with 15 layers for
high-temperature applications
SO JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
LA English
DT Article
DE Ceramics; Joining; Functionally graded materials; High-temperature
strength
ID FUNCTIONALLY GRADED MATERIALS; CERAMICS; COMPOSITES
AB "Crack-free" alumina-silicon nitride Joints, comprised of 15 layers of gradually differing compositions of Al2O3/Si3N4, have been fabricated using sialon polytypoids as functionally graded materials (FGM) bonding layers for high-temperature applications Using flexural strength tests conducted both at room and at elevated temperatures, the average fracture strength at room temperature was found to be 437 MPa, significantly, this value was unchanged at temperatures up to 1000 degrees C Scanning electron microscopy (SEM) observations of fracture surfaces indicated the absence of any glassy phase at the triple points This result was (pile contrary to the previously reported 20-layer Al2O3/Si3N4 FGM samples where three-point bend testing revealed a severe strength degradation at high temperatures Consequently, we believe that the Joining of alumina to silicon nitride using polytypoidally functional gradients can markedly improve the suitability of these joints for high-temperature applications. (C) 2010 Elsevier Ltd All rights reserved
C1 [Lee, C. S.; Cho, D. G.; Roh, J. Y.] Hanyang Univ, Div Mat & Chem Engn, Ansan, Gyeonggi Do, South Korea.
[Lemberg, J. A.; Ritchie, R. O.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Lemberg, J. A.; Ritchie, R. O.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
RP Lee, CS (reprint author), Hanyang Univ, Div Mat & Chem Engn, 5th Engn Bldg,Rm 321,1271 Sa 1 Dong, Ansan, Gyeonggi Do, South Korea.
RI Ritchie, Robert/A-8066-2008
OI Ritchie, Robert/0000-0002-0501-6998
FU Korea government (MEST) [2010-0000450]; Office of Basic Enemy Sciences,
Materials Sciences and Engineering Division, of the U.S Department of
Energy [DE-AC02-05CH11231]
FX This work was supported by the Korea Science and Engineering Foundation
(KOSEF) grant funded by the Korea government (MEST) (no. 2010-0000450).
The authors would like to thank Sae-Hee Ryu and Jong-Ha Park from
Samsung for their support Funding for JAL and ROR was provided by the
Director, Office of Science. Office of Basic Enemy Sciences, Materials
Sciences and Engineering Division, of the U.S Department of Energy under
Contract No. DE-AC02-05CH11231.
NR 13
TC 6
Z9 6
U1 2
U2 19
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0955-2219
J9 J EUR CERAM SOC
JI J. Eur. Ceram. Soc.
PD MAY
PY 2010
VL 30
IS 7
BP 1743
EP 1749
DI 10.1016/j.jeurceramsoc.2010.01.012
PG 7
WC Materials Science, Ceramics
SC Materials Science
GA 576UL
UT WOS:000276174700020
ER
PT J
AU Chen, ZG
Taylor, AJ
Efimov, A
AF Chen, Zhigang
Taylor, Antoinette J.
Efimov, Anatoly
TI Soliton dynamics in non-uniform fiber tapers: analytical description
through an improved moment method
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
LA English
DT Article
ID SELF-FREQUENCY SHIFT; PHOTONIC CRYSTAL FIBER; NONLINEAR
SCHRODINGER-EQUATION; OPTICAL-FIBERS; PULSE-COMPRESSION; MU-M;
DISPERSION; PROPAGATION; GENERATION; WAVELENGTH
AB We develop an improved moment method to model soliton propagation in optical fibers. We account for the full Raman gain spectrum of the material and derive a system of coupled differential equations describing the evolution of five moments of the pulse, valid for arbitrary soliton durations. By comparing with the numerical solution of the generalized nonlinear Schrodinger equation, the improved moment method is shown to accurately represent soliton self-frequency shift under complex dispersion, nonlinearity, and Raman gain spectra. Numerical examples are presented for a dispersion-shifted fused silica fiber and a non-uniform ZBLAN fluoride fiber taper. The latter demonstrates an enhanced soliton self-frequency shift through axial dispersion and nonlinearity engineering along the taper length. (C) 2010 Optical Society of America
C1 [Chen, Zhigang; Taylor, Antoinette J.; Efimov, Anatoly] Los Alamos Natl Lab, Ctr Integrated Nanotechnol Mat Phys & Applicat, Los Alamos, NM 87544 USA.
RP Chen, ZG (reprint author), Los Alamos Natl Lab, Ctr Integrated Nanotechnol Mat Phys & Applicat, POB 1663, Los Alamos, NM 87544 USA.
EM zzchen@lanl.gov
OI Efimov, Anatoly/0000-0002-5559-4147
FU U.S. DOE [DE-AC52-06NA25396]
FX This work was performed, in part, at the Center for Integrated
Nanotechnologies, a U.S. Department of Energy (DOE) Office of Basic
Energy Sciences user facility. Los Alamos National Laboratory, an
affirmative action equal opportunity employer, is operated by Los Alamos
National Security, LLC, for the National Nuclear Security Administration
of the U.S. DOE under contract DE-AC52-06NA25396.
NR 29
TC 12
Z9 12
U1 0
U2 2
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0740-3224
J9 J OPT SOC AM B
JI J. Opt. Soc. Am. B-Opt. Phys.
PD MAY
PY 2010
VL 27
IS 5
BP 1022
EP 1030
PG 9
WC Optics
SC Optics
GA 590QF
UT WOS:000277241400026
ER
PT J
AU Olynick, DL
Cord, B
Schipotinin, A
Ogletree, DF
Schuck, PJ
AF Olynick, D. L.
Cord, B.
Schipotinin, A.
Ogletree, D. F.
Schuck, P. J.
TI Electron-beam exposure mechanisms in hydrogen silsesquioxane
investigated by vibrational spectroscopy and in situ
electron-beam-induced desorption
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article
DE desorption; electron beam effects; electron beam lithography; infrared
spectra; nanolithography; organic compounds; Raman spectra; resists;
vibrational states
ID ROOM-TEMPERATURE NANOIMPRINT; X-RAY MICROSCOPY; BILAYER RESIST;
DISSOCIATIVE IONIZATION; LITHOGRAPHY; POLYMERS; SILANE
AB Hydrogen silsesquioxane (HSQ) is used as a high-resolution resist with resolution down below 10 nm half-pitch. This material or materials with related functionalities could have widespread impact in nanolithography and nanoscience applications if the exposure mechanism was understood and instabilities controlled. Here we have directly investigated the exposure mechanism using vibrational spectroscopy (both Raman and Fourier-transform infrared) and electron-beam-induced desorption spectroscopy (EBID). In the non-networked HSQ system, silicon atoms sit at the corners of a cubic structure. Each silicon is bonded to a hydrogen atom and bridges three oxygen atoms (formula: HSiO3/2). For the first time, we have shown, via changes in the Si-H-2 peak at similar to 2200 cm(-1) in the Raman spectra and the release of SiHx products in EBID, that electron-beam-exposed material cross-links via a redistribution reaction. In addition, we observe the release of significantly more H-2 than SiH2 during EBID, which is indicative of additional reaction mechanisms. Furthermore, we compare the behavior of HSQ in response to both thermally and electron-beam induced reactions. (C) 2010 American Vacuum Society. [DOI: 10.1116/1.3425632]
C1 [Olynick, D. L.; Schipotinin, A.; Ogletree, D. F.; Schuck, P. J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA.
[Cord, B.] Vistec Lithog Inc, Watervliet, NY 12189 USA.
RP Olynick, DL (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM dlolynick@lbl.gov
RI Ogletree, D Frank/D-9833-2016
OI Ogletree, D Frank/0000-0002-8159-0182
FU Office of Science, Office of Basic Energy Sciences, of the U.S.
Department of Energy [DE-AC02-05CH11231]; Vistec Lithography, Inc.;
Helmut-Schmidt University
FX The authors would like to thank Adam Schwartzberg for useful discussions
on Raman Spectra, Professor Thomas Klassen, Head of the Student Exchange
Program at Helmut-Schmidt University, and Babak Sanii. This work was
performed at the Molecular Foundry, Lawrence Berkeley National
Laboratory, and was supported by the Office of Science, Office of Basic
Energy Sciences, of the U.S. Department of Energy under Contract No.
DE-AC02-05CH11231. A. S. was supported by the student exchange program
at Helmut-Schmidt University. B.C. was supported by Vistec Lithography,
Inc.
NR 26
TC 21
Z9 21
U1 0
U2 7
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD MAY
PY 2010
VL 28
IS 3
BP 581
EP 587
DI 10.1116/1.3425632
PG 7
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 603BK
UT WOS:000278182700027
ER
PT J
AU Novikov, SV
Staddon, CR
Foxon, CT
Yu, KM
Broesler, R
Hawkridge, M
Liliental-Weber, Z
Walukiewicz, W
Denlinger, J
Demchenko, I
AF Novikov, S. V.
Staddon, C. R.
Foxon, C. T.
Yu, K. M.
Broesler, R.
Hawkridge, M.
Liliental-Weber, Z.
Walukiewicz, W.
Denlinger, J.
Demchenko, I.
TI Molecular beam epitaxy of GaNAs alloys with high As content for
potential photoanode applications in hydrogen production
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 26th North American Conference on Molecular Beam Epitaxy
CY AUG 09-12, 2009
CL Princeton Univ, Princeton, NJ
SP City Coll New York, Riber, Veeco, AVS Sci & Technol Mat, Interfaces & Proc, Natl Sci Fdn, Engn Res Ctr, MIRTHE
HO Princeton Univ
DE aluminium compounds; amorphous state; energy gap; gallium compounds;
III-V semiconductors; molecular beam epitaxial growth; plasma materials
processing; semiconductor growth; transmission electron microscopy;
X-ray absorption; X-ray emission spectra; X-ray microscopy
ID BAND-GAP ENERGY; LAYERS
AB The authors have succeeded in growing GaN1-xAsx alloys over a large composition range (0 < x < 0.8) by plasma-assisted molecular beam epitaxy. The enhanced incorporation of As was achieved by growing the films with high As-2 flux at low (as low as 100 degrees C) growth temperatures, which is much below the normal GaN growth temperature range. Using x-ray and transmission electron microscopy, they found that the GaNAs alloys with high As content x>0.17 are amorphous. Optical absorption measurements together with x-ray absorption and emission spectroscopy results reveal a continuous gradual decrease in band gap from similar to 3.4 to < 1 eV with increasing As content. The energy gap reaches its minimum of similar to 0.8 eV at x similar to 0.8. The composition dependence of the band gap of the crystalline GaN1-xAsx alloys follows the prediction of the band anticrossing model (BAC). However, our measured band gap of amorphous GaN1-xAsx with 0.3 < x < 0.8 are larger than that predicted by BAC. The results seem to indicate that for this composition range the amorphous GaN1-xAsx alloys have short-range ordering that resembles random crystalline GaN1-xAsx alloys. They have demonstrated the possibility of the growth of amorphous GaN1-xAsx layers with variable As content on glass substrates.
C1 [Novikov, S. V.; Staddon, C. R.; Foxon, C. T.] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England.
[Yu, K. M.; Broesler, R.; Hawkridge, M.; Liliental-Weber, Z.; Walukiewicz, W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Denlinger, J.; Demchenko, I.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Demchenko, I.] Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA.
[Demchenko, I.] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland.
RP Novikov, SV (reprint author), Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England.
EM sergei.novikov@nottingham.ac.uk
RI Liliental-Weber, Zuzanna/H-8006-2012; Yu, Kin Man/J-1399-2012
OI Yu, Kin Man/0000-0003-1350-9642
NR 10
TC 11
Z9 11
U1 0
U2 8
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD MAY
PY 2010
VL 28
IS 3
DI 10.1116/1.3368600
PG 5
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 603BK
UT WOS:000278182700048
ER
PT J
AU Zahl, P
Wagner, T
Moller, R
Klust, A
AF Zahl, Percy
Wagner, Thorsten
Moeller, Rolf
Klust, Andreas
TI Open source scanning probe microscopy control software package GXSM
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article
DE atomic force microscopy; data acquisition; image processing; public
domain software; scanning tunnelling microscopy; software packages
ID DIGITAL-CONTROL SYSTEM; TUNNELING-MICROSCOPY; FORCE MICROSCOPY
AB GXSM is a full featured and modern scanning probe microscopy (SPM) software. It can be used for powerful multidimensional image/data processing, analysis, and visualization. Connected to an instrument, it is operating many different flavors of SPM, e.g., scanning tunneling microscopy and atomic force microscopy or, in general, two-dimensional multichannel data acquisition instruments. The GXSM core can handle different data types, e.g., integer and floating point numbers. An easily extendable plug-in architecture provides many image analysis and manipulation functions. A digital signal processor subsystem runs the feedback loop, generates the scanning signals, and acquires the data during SPM measurements. The programmable GXSM vector probe engine performs virtually any thinkable spectroscopy and manipulation task, such as scanning tunneling spectroscopy or tip formation. The GXSM software is released under the GNU general public license and can be obtained via the internet. (C) 2010 American Vacuum Society. [DOI: 10.1116/1.3374719]
C1 [Zahl, Percy] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
[Wagner, Thorsten] Johannes Kepler Univ Linz, Inst Expt Phys, Atom Phys & Surface Sci Div, A-4040 Linz, Austria.
[Moeller, Rolf] Univ Duisburg Essen, Dept Phys, D-47048 Duisburg, Germany.
[Klust, Andreas] MIT, Cambridge, MA 02139 USA.
RP Zahl, P (reprint author), Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
EM zahl@users.sourceforge.net
RI Zahl, Percy/B-1244-2008; Wagner, Thorsten/D-1589-2010
OI Zahl, Percy/0000-0002-6629-7500; Wagner, Thorsten/0000-0002-9178-8301
FU Deutsche Forschungsgemeinschaft; U.S. Department of Energy
[DE-AC02-98CH1-886]
FX The authors thank all volunteers29 contributing to the GXSM
project and the GXSM user community for many ideas and discussions. The
shown STM image in Fig. 5 was taken by Peter Albrecht at the Center for
Functional Nanomaterials. In particular the authors thank Bruno Paillard
and SOFTDB (Ref. 11) for their outstanding cooperation and the design of
the new A810 analog module.12 One of the authors (R.M.)
gratefully acknowledges financial support from the Deutsche
Forschungsgemeinschaft under program "SFB616: Energy Dissipation at
Surfaces." This work was performed under the auspices of the U.S.
Department of Energy under Grant No. DE-AC02-98CH1-886.
NR 17
TC 21
Z9 21
U1 1
U2 16
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD MAY
PY 2010
VL 28
IS 3
DI 10.1116/1.3374719
PG 9
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 603BK
UT WOS:000278182700115
ER
PT J
AU Vaidya, NK
Ribeiro, RM
Miller, CJ
Perelson, AS
AF Vaidya, Naveen K.
Ribeiro, Ruy M.
Miller, Christopher J.
Perelson, Alan S.
TI Viral Dynamics during Primary Simian Immunodeficiency Virus Infection:
Effect of Time-Dependent Virus Infectivity
SO JOURNAL OF VIROLOGY
LA English
DT Article
ID HEPATITIS-C VIRUS; PRIMARY HIV-INFECTION; IN-VIVO; RHESUS MACAQUES;
PLASMA VIRUS; T-CELLS; B-VIRUS; TRANSMISSION; VIREMIA; REPLICATION
AB A recent experiment involving simian immunodeficiency virus (SIV) infection of macaques revealed that the infectivity of this virus decreased over the first few months of infection. Based on this observation, we introduce a viral dynamic model in which viral infectivity varies over time. The model is fit to viral load data from eight (donor) monkeys infected by intravaginal inoculation of SIVmac251, three monkeys infected by intravenous inoculation of virus isolated from the donors during the ramp-up phase of acute infection, and three monkeys infected by intravenous inoculation of virus isolated at the viral set-point. Although we only analyze data from 14 monkeys, the new model with time-dependent infectivity seems to fit the data significantly better than a widely used model with constant infectivity (P = 2.44 x 10(-11)). Our results indicate that plasma virus infectivity on average decays similar to 8-fold (95% confidence interval [CI] = 5.1 to 10.3) over the course of acute infection, with the decay occurring exponentially with an average rate of 0.28 day(-1) (95% CI = 0.14 to 0.42 day(-1)). The decay rate in set point plasma virus recipient animals is similar to 16 times slower than in ramp-up plasma virus recipient animals and similar to 6 times slower than in donor animals. Throughout acute infection up to the set-point, the infection rate is higher in ramp-up plasma virus recipient animals than in set-point plasma virus recipient animals. These results show that the infectivity depends upon the source of viral infection.
C1 [Vaidya, Naveen K.; Ribeiro, Ruy M.; Perelson, Alan S.] Los Alamos Natl Lab, Theoret Biol & Biophys Grp, Los Alamos, NM 87545 USA.
[Miller, Christopher J.] Univ Calif Davis, Calif Natl Primate Res Ctr, Davis, CA 95616 USA.
RP Perelson, AS (reprint author), Los Alamos Natl Lab, Theoret Biol & Biophys Grp, MS K710, Los Alamos, NM 87545 USA.
EM asp@lanl.gov
OI Ribeiro, Ruy/0000-0002-3988-8241
FU U.S. Department of Energy [DE-AC52-06NA25396]; Center for HIV/AIDS
Vaccine Immunology; NIH [AI28433-19, RR06555-18, P20-RR18754,
U51-RR00169, P01 AI066314]
FX Portions of this study were done under the auspices of the U.S.
Department of Energy under contract DE-AC52-06NA25396 and supported by
the Center for HIV/AIDS Vaccine Immunology, NIH grants AI28433-19 and
RR06555-18 (A. S. P.), P20-RR18754 (R. M. R. and A. S. P.), and
U51-RR00169 and P01 AI066314 (C.J.M.), as well as a gift from the James
B. Pendleton Charitable Trust (C.J.M.).
NR 49
TC 19
Z9 20
U1 0
U2 2
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0022-538X
J9 J VIROL
JI J. Virol.
PD MAY
PY 2010
VL 84
IS 9
BP 4302
EP 4310
DI 10.1128/JVI.02284-09
PG 9
WC Virology
SC Virology
GA 579GW
UT WOS:000276358000018
PM 20147390
ER
PT J
AU He, LL
Piper, A
Meilleur, F
Myles, DAA
Hernandez, R
Brown, DT
Heller, WT
AF He, Lilin
Piper, Amanda
Meilleur, Flora
Myles, Dean A. A.
Hernandez, Raquel
Brown, Dennis T.
Heller, William T.
TI The Structure of Sindbis Virus Produced from Vertebrate and Invertebrate
Hosts as Determined by Small-Angle Neutron Scattering
SO JOURNAL OF VIROLOGY
LA English
DT Article
ID SEMLIKI-FOREST-VIRUS; X-RAY SOLUTION; MOSAIC-VIRUS; BIOLOGICAL
MACROMOLECULES; CONFORMATIONAL-CHANGES; TRANSMEMBRANE DOMAIN;
PLASMA-MEMBRANES; E2 GLYCOPROTEINS; MOLECULAR-WEIGHT; ENDO DOMAIN
AB The complex natural cycle of vectored viruses that transition between host species, such as between insects and mammals, makes understanding the full life cycle of the virus an incredibly complex problem. Sindbis virus, an arbovirus and prototypic alphavirus having an inner protein shell and an outer glycoprotein coat separated by a lipid membrane, is one example of a vectored virus that transitions between vertebrate and insect hosts. While evidence of host-specific differences in Sindbis virus has been observed, no work has been performed to characterize the impact of the host species on the structure of the virus. Here, we report the first study of the structural differences between Sindbis viruses grown in mammalian and insect cells, which were determined by small-angle neutron scattering (SANS), a nondestructive technique that did not decrease the infectivity of the Sindbis virus particles studied. The scattering data and modeling showed that, while the radial position of the lipid bilayer did not change significantly, it was possible to conclude that it did have significantly more cholesterol when the virus was grown in mammalian cells. Additionally, the outer protein coat was found to be more extended in the mammalian Sindbis virus. The SANS data also demonstrated that the RNA and nucleocapsid protein share a closer interaction in the mammalian-cell-grown virus than in the virus from insect cells.
C1 [He, Lilin; Myles, Dean A. A.; Heller, William T.] Oak Ridge Natl Lab, Ctr Struct Mol Biol, Oak Ridge, TN 37831 USA.
[He, Lilin; Myles, Dean A. A.; Heller, William T.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
[Piper, Amanda; Meilleur, Flora; Hernandez, Raquel; Brown, Dennis T.] N Carolina State Univ, Dept Mol & Struct Biochem, Raleigh, NC 27695 USA.
[Meilleur, Flora; Myles, Dean A. A.] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
RP Heller, WT (reprint author), Oak Ridge Natl Lab, Ctr Struct Mol Biol, POB 2008,MS 6393, Oak Ridge, TN 37831 USA.
EM hellerwt@ornl.gov
RI myles, dean/D-5860-2016;
OI myles, dean/0000-0002-7693-4964; He, Lilin/0000-0002-9560-8101
FU Oak Ridge National Laboratory (ORNL); The Foundation for Research,
Carson City, NV; Office of Biological and Environmental Research; U.S.
Department of Energy [DE-AC05-00OR22725]
FX This research was sponsored by the Laboratory Directed Research and
Development Program of Oak Ridge National Laboratory (ORNL) (F.M.).
D.T.B. and R.H. are supported by The Foundation for Research, Carson
City, NV. The research at ORNL's Center for Structural Molecular Biology
(CSMB) was supported by the Office of Biological and Environmental
Research, using facilities supported by the U.S. Department of Energy
and managed by UT-Battelle, LLC, under contract no. DE-AC05-00OR22725.
NR 62
TC 14
Z9 17
U1 0
U2 3
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0022-538X
J9 J VIROL
JI J. Virol.
PD MAY
PY 2010
VL 84
IS 10
BP 5270
EP 5276
DI 10.1128/JVI.00044-10
PG 7
WC Virology
SC Virology
GA 591QW
UT WOS:000277318600040
PM 20219936
ER
PT J
AU Kwon, TH
Hong, ES
Cho, GC
AF Kwon, Tae-Hyuk
Hong, Eun-Soo
Cho, Gye-Chun
TI Shear behavior of rectangular-shaped asperities in rock joints
SO KSCE JOURNAL OF CIVIL ENGINEERING
LA English
DT Article
DE asperity characteristics; rectangular-shaped asperity; progressive
failure; rock joint; shear behavior; shear strength
ID ROUGHNESS
AB This study addresses the shear behavior of rectangular asperities on rock joints to highlight the role of asperity characteristics related to joint shear behavior. The shear strength and failure mode of a rectangular asperity are theoretically derived from force equilibrium analysis, and the relationship between shear strength and shear displacement of a unit asperity is obtained considering shear mechanisms and asperity characteristics. Two failure modes of a rectangular asperity are determined depending on its shape and critical aspect ratio: a dilative failure mode with an inclination of 45-I center dot (f) /2 and a non-dilative failure mode with shearing of asperity. The range of critical aspect ratio is 0.15 to 0.32 for general rocks. The shear strength of a rectangular asperity is also determined with peak friction angle, cohesion, basic friction angle, aspect ratio, and normal stress. Direct shear tests on artificial joints are performed to verify the theoretical analysis on a rectangular asperity and to explore the effect of asperity size distribution and progressive failure. Based on the analysis on a unit asperity, various effects, such as asperity geometric distribution, normal stress, and specimen size, are discussed in relation to the shear behavior of rock joints.
C1 [Hong, Eun-Soo; Cho, Gye-Chun] Korea Adv Inst Sci & Technol, Dept Civil & Environm Engn, Taejon 305701, South Korea.
[Kwon, Tae-Hyuk] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Cho, GC (reprint author), Korea Adv Inst Sci & Technol, Dept Civil & Environm Engn, Taejon 305701, South Korea.
EM kikig81@gmail.com; eshong@kaist.ac.kr; gyechun@kaist.edu
RI Cho, Gye-Chun/C-1600-2011; Kwon, Tae-Hyuk/F-2183-2013
FU Smart Infra-Structures Technology Center (SISTeC) under KOSEF; Ministry
of Construction & Transportation of Korean Government [07Urban
RenaissanceB03]
FX This work was supported by the Smart Infra-Structures Technology Center
(SISTeC) under KOSEF and the grant (07Urban RenaissanceB03) from
High-Tech Urban Development Program funded by the Ministry of
Construction & Transportation of Korean Government.
NR 23
TC 4
Z9 6
U1 0
U2 15
PU KOREAN SOCIETY OF CIVIL ENGINEERS-KSCE
PI SEOUL
PA 50-7 OGUM-DONG, SONGPA-KU, SEOUL, 138-857, SOUTH KOREA
SN 1226-7988
EI 1976-3808
J9 KSCE J CIV ENG
JI KSCE J. Civ. Eng.
PD MAY
PY 2010
VL 14
IS 3
BP 323
EP 332
DI 10.1007/s12205-010-0323-1
PG 10
WC Engineering, Civil
SC Engineering
GA 593CY
UT WOS:000277430900008
ER
PT J
AU Kim, T
Sheng, YP
AF Kim, Taeyun
Sheng, Y. P.
TI Estimation of water quality model parameters
SO KSCE JOURNAL OF CIVIL ENGINEERING
LA English
DT Article
DE water quality model; estimation of model parameters; Gauss-Newton
Method; water quality state variables
ID ECOSYSTEM; OPTIMIZATION; SIMULATION; DYNAMICS; COASTAL; FLORIDA; USA
AB A modified Gauss-Newton method was utilized to estimate water quality model parameters, which is important in the modeling of water quality transport process. This method served the unknown parameters of three engineering problems exceptionally well. We applied this method to obtain a set of water quality parameters by solving the kinetic equations for dissolved and particulate water quality species during episodic events in the Indian River Lagoon, FL. The method was successful in producing water quality model parameters, and the relative errors between measurements and model predictions are below 46.4% and 39.4% for all dissolved and particulate water quality state variables, respectively. In this study we evaluated a good capability of suggested parameter estimation method by comparing a couple of water quality model simulations: (1) water quality model simulation using model parameters produced by the modified Gauss-Newton method and (2) water quality model simulation employing model parameters obtained by the trial-and-error method. The average relative error and ROC score between observed data and water quality model results using model parameters calculated by the modified Gauss-Newton method are 58.3% and 0.565, respectively. In the case of water quality model simulation using model parameters obtained by the trial-and-error method, the average relative error and ROC score are 60.5% and 0.555, respectively. This suggests that the modified Gauss-Newton method efficiently yields water quality model parameters resulting in better or similar model prediction errors when compared to the trial-and-error method.
C1 [Kim, Taeyun] Pacific NW Natl Lab, Seattle, WA 98109 USA.
[Sheng, Y. P.] Univ Florida, Gainesville, FL 32611 USA.
RP Kim, T (reprint author), Pacific NW Natl Lab, Seattle, WA 98109 USA.
EM Taeyun.Kim@pnl.gov; pete@coastal.ufl.edu
FU St. Johns River Water Management District for application of the
integrated modeling system
FX This research was funded in part by the St. Johns River Water Management
District for application of the integrated modeling system to the Indian
River Lagoon. Contributors to the development of the CH3D-IMS include
Justin R. Davis, Kijin Park, Chenxia Qiu, Detong Sun, David Christian,
Eduardo Yassuda, and Xinjian Chen. We appreciate Sidney L. Schofield,
Justin R. Davis, Kijin Park, Chenxia Qiu, Detong Sun, Davis Christian,
Jun Lee, Joel Melanson, Haifeng Du, and Vik Adams who contributed to the
collection of the field data. We are also very grateful to two anonymous
reviewers who provided helpful comments on earlier versions of this
manuscript. Especially, we thank Professor Il-Heum Park who gave us a
guideline of structure of the paper, reviewed the paper, provided
precious comments, and involved the revising process.
NR 54
TC 4
Z9 4
U1 0
U2 19
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1226-7988
J9 KSCE J CIV ENG
JI KSCE J. Civ. Eng.
PD MAY
PY 2010
VL 14
IS 3
BP 421
EP 437
DI 10.1007/s12205-010-0421-0
PG 17
WC Engineering, Civil
SC Engineering
GA 593CY
UT WOS:000277430900018
ER
PT J
AU Montiel, D
Yang, H
AF Montiel, Daniel
Yang, Haw
TI Real-time three-dimensional single-particle tracking spectroscopy for
complex systems
SO LASER & PHOTONICS REVIEWS
LA English
DT Review
DE Single-molecule spectroscopy; nanoparticle; quantum dot; anomalous
diffusion; translational diffusion; rotational diffusion; self-assembly;
glass transition; supercooled liquids
ID HETEROGENEOUS DYNAMIC DOMAINS; SUPERCOOLED O-TERPHENYL; QUANTUM DOTS;
GLASS-TRANSITION; FLUORESCENT NANOPARTICLES; CONFORMATIONAL DYNAMICS;
FRACTIONAL DYNAMICS; CHROMATIN DYNAMICS; DYE MOLECULES; LIQUIDS
AB Complex systems are characterized by dynamical processes spread over multiple time and length scales. At a given instant, these systems can display spatial heterogeneities in which the local physical and chemical properties are nonuniform, depending on the location. They can also exhibit dynamical heterogeneities in which the local dynamical characteristics vary with time. These types of systems pose unique experimental challenges for their characterization and test of theoretical ideas. Recently, real-time three-dimensional (3D) single-particle tracking spectroscopy has been developed to address these kinds of problems. With this approach, in principle, one can follow how a system evolves spatially as well as temporally. This article attempts to provide an introduction to this promising new technique by discussing the aims of studying a complex system and recent experimental advances towards this goal.
[GRAPHICS]
Cartoon illustrating a complex system, whose dynamics change as a function of time and position, studied using 3D particle-tracking spectroscopy. (C) 2010 by WILEY-VCH Verlag GmbH & Co. KGaA. Weinheim
C1 [Montiel, Daniel; Yang, Haw] Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Yang, H (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem, Phys Biosci Div, Berkeley, CA 94720 USA.
EM hawyang@berkeley.edu
NR 79
TC 7
Z9 7
U1 4
U2 30
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1863-8880
J9 LASER PHOTONICS REV
JI Laser Photon. Rev.
PD MAY
PY 2010
VL 4
IS 3
BP 374
EP 385
DI 10.1002/lpor.200910012
PG 12
WC Optics; Physics, Applied; Physics, Condensed Matter
SC Optics; Physics
GA 596PR
UT WOS:000277697800003
ER
PT J
AU Svec, F
AF Svec, Frantisek
TI New Developments in the Field of Monoliths for Chromatography
SO LC GC EUROPE
LA English
DT Editorial Material
ID EXCHANGE STATIONARY PHASES; PERFORMANCE LIQUID-CHROMATOGRAPHY; POROUS
POLYMER MONOLITHS; EPOXY-BASED MONOLITHS; SEPARATION MEDIA; SMALL
MOLECULES; COLUMNS; PEPTIDES; PROTEINS; LAYER
AB Monolith pioneer, Frantisek Svec, brings readers up to date on the latest developments in monoliths for use in chromatography. Breakthroughs in the organic monoliths include phases for small molecule separations, nanoparticle-modified surfaces, new approaches to polymeric monoliths and design of monolithic layers. Less common inorganic monoliths are highlighted. Finally, commercial sources for monolith technology are covered for those who would like to purchase rather than synthesize their columns.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA.
RP Svec, F (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA.
NR 41
TC 4
Z9 5
U1 1
U2 20
PU ADVANSTAR COMMUNICATIONS INC
PI DULUTH
PA 131 W 1ST STREET, DULUTH, MN 55802 USA
SN 1471-6577
J9 LC GC EUR
JI LC GC Eur.
PD MAY
PY 2010
VL 23
IS 5
BP 272
EP +
PG 6
WC Chemistry, Analytical
SC Chemistry
GA 601UD
UT WOS:000278089400004
ER
PT J
AU Bradbury, A
AF Bradbury, Andrew
TI The Antibody Society
SO MABS
LA English
DT Editorial Material
C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
RP Bradbury, A (reprint author), Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
EM andrew.bradbury@antibodysociety.org
NR 0
TC 1
Z9 1
U1 0
U2 0
PU LANDES BIOSCIENCE
PI AUSTIN
PA 1002 WEST AVENUE, 2ND FLOOR, AUSTIN, TX 78701 USA
SN 1942-0862
J9 MABS-AUSTIN
JI mAbs
PD MAY-JUN
PY 2010
VL 2
IS 3
BP 211
EP 211
PG 1
WC Medicine, Research & Experimental
SC Research & Experimental Medicine
GA 644OL
UT WOS:000281388200001
ER
PT J
AU Khor, HK
Jacoby, ME
Squier, TC
Chu, GC
Chelius, D
AF Khor, Hui K.
Jacoby, Michael E.
Squier, Thomas C.
Chu, Grace C.
Chelius, Dirk
TI Identification of methionine sulfoxide diastereomers in immunoglobulin
gamma antibodies using methionine sulfoxide reductase enzymes
SO MABS
LA English
DT Article
DE immunoglobulin gamma antibody; methionine sulfoxide; oxidation;
photo-oxidation; methionine sulfoxide reductase
ID RECOMBINANT MONOCLONAL-ANTIBODY; SHEWANELLA-ONEIDENSIS;
PHYSIOLOGICAL-ROLE; HEAVY-CHAIN; HUMAN IGG1; OXIDATION; FC; RESIDUES;
SEQUENCE; REPAIR
AB Light-induced formation of singlet oxygen selectively oxidizes methionines in the heavy chain of IgG2 antibodies. Peptide mapping has indicated the following sensitivities to oxidation: M252 > M428 > M397. Irrespective of the light source, formulating proteins with the free amino acid methionine limits oxidative damage. Conventional peptide mapping cannot distinguish between the S- and R-diastereomers of methionine sulfoxide (Met[O]) formed in the photo-oxidized protein because of their identical polarities and masses. We have developed a method for identification and quantification of these diastereomers by taking advantage of the complementary stereospecificities of the methionine sulfoxide reductase (Msr) enzymes MsrA and MsrB, which promote the selective reduction of S- and R-diastereomers of Met(O), respectively. In addition, an MsrBA fusion protein that contains both Msr enzyme activities permitted the quantitative reduction of all Met(O) diastereomers. Using these Msr enzymes in combination with peptide mapping, we were able to detect and differentiate diastereomers of methionine sulfoxide within the highly conserved heavy chain of an IgG2 that had been photo-oxidized, as well as those in an IgG1 oxidized with peroxide. The rapid identification of the stereospecificity of methionine oxidation by Msr enzymes not only definitively differentiates Met(O) diastereomers, which previously has been indistinguishable using traditional techniques, but also provides an important tool that may contribute to understanding of the mechanisms of protein oxidation and development of new formulation strategies to stabilize protein therapeutics.
C1 [Khor, Hui K.; Chu, Grace C.; Chelius, Dirk] Amgen Inc, Dept Pharmaceut, Thousand Oaks, CA 91320 USA.
[Jacoby, Michael E.; Squier, Thomas C.] Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA.
RP Chelius, D (reprint author), Amgen Inc, Dept Pharmaceut, 1 Amgen Ctr Dr, Thousand Oaks, CA 91320 USA.
EM Dirk.Chelius@trionpharma.de
FU Amgen Inc.; U.S. Department of Energy
FX We thank Dr. Pavel Bondarenko for valuable comments and suggestions
during the preparation of the manuscript. This research was supported by
Amgen Inc., and the Genomic Science Program at the U.S. Department of
Energy.
NR 44
TC 9
Z9 10
U1 0
U2 2
PU LANDES BIOSCIENCE
PI AUSTIN
PA 1002 WEST AVENUE, 2ND FLOOR, AUSTIN, TX 78701 USA
SN 1942-0862
J9 MABS-AUSTIN
JI mAbs
PD MAY-JUN
PY 2010
VL 2
IS 3
BP 299
EP 308
PG 10
WC Medicine, Research & Experimental
SC Research & Experimental Medicine
GA 644OL
UT WOS:000281388200009
PM 20404551
ER
PT J
AU Tao, JM
Tretiak, S
Zhu, JX
AF Tao, Jianmin
Tretiak, Sergei
Zhu, Jian-Xin
TI Prediction of Excitation Energies for Conjugated Oligomers and Polymers
from Time-Dependent Density Functional Theory
SO MATERIALS
LA English
DT Review
DE time-dependent density functional theory; excitation energy; optical
absorption; light-emitting conjugated oligomers
ID LIGHT-EMITTING OLIGOQUINOLINES; GENERALIZED GRADIENT APPROXIMATION;
EXCHANGE-CORRELATION POTENTIALS; COUPLED-CLUSTER METHOD; EXCITED-STATES;
ELECTRONIC EXCITATIONS; HIGH-EFFICIENCY; CHARGE-TRANSFER; ADIABATIC
APPROXIMATION; TRIPHENYL ENDGROUPS
AB With technological advances, light-emitting conjugated oligomers and polymers have become competitive candidates in the commercial market of light-emitting diodes for display and other technologies, due to the ultralow cost, light weight, and flexibility. Prediction of excitation energies of these systems plays a crucial role in the understanding of their optical properties and device design. In this review article, we discuss the calcualation of excitation energies with time-dependent density functional theory, which is one of the most successful methods in the investigation of the dynamical response of molecular systems to external perturbation, owing to its high computational efficiency.
C1 [Tao, Jianmin; Tretiak, Sergei; Zhu, Jian-Xin] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Tao, Jianmin; Tretiak, Sergei; Zhu, Jian-Xin] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
[Tretiak, Sergei] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA.
RP Tao, JM (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM jtao@lanl.gov
RI Tretiak, Sergei/B-5556-2009;
OI Tretiak, Sergei/0000-0001-5547-3647; Zhu, Jianxin/0000-0001-7991-3918
FU National Nuclear Security Administration of the U.S. DOE at LANL
[DE-AC52-06NA25396]; U.S. DOE Office of Science; LANL; Center for
Integrated Nanotechnology (CINT); Center for Nonlinear Studies (CNRS) at
LANL
FX We thank Herbert Meier for inviting us to write this review article.
This work was supported by the National Nuclear Security Administration
of the U.S. DOE at LANL under Contact No. DE-AC52-06NA25396, the U.S.
DOE Office of Science, and the LDRD Program at LANL. We acknowledge
support of Center for Integrated Nanotechnology (CINT) and Center for
Nonlinear Studies (CNRS) at LANL.
NR 141
TC 3
Z9 3
U1 0
U2 14
PU MDPI AG
PI BASEL
PA POSTFACH, CH-4005 BASEL, SWITZERLAND
SN 1996-1944
J9 MATERIALS
JI Materials
PD MAY
PY 2010
VL 3
IS 5
BP 3430
EP 3467
DI 10.3390/ma3053430
PG 38
WC Materials Science, Multidisciplinary
SC Materials Science
GA 864LJ
UT WOS:000298241200015
ER
PT J
AU Botiz, I
Darling, SB
AF Botiz, Ioan
Darling, Seth B.
TI Optoelectronics using block copolymers
SO MATERIALS TODAY
LA English
DT Review
ID POLYMER SOLAR-CELLS; TRANSFER RADICAL POLYMERIZATION;
LIGHT-EMITTING-DIODES; CONJUGATED TRIBLOCK COPOLYMERS; ACCEPTOR DIBLOCK
COPOLYMERS; ELECTROLUMINESCENT DEVICES; ORGANIC SEMICONDUCTORS;
PHOTOVOLTAIC CELLS; MICROPHASE SEPARATION; SELF-ORGANIZATION
AB Block copolymers, either as semiconductors themselves or as structure directors, are emerging as a promising class of materials for understanding and controlling processes associated with both photovoltaic energy conversion and light emitting devices. The increasing interest in block copolymers originates not only from their potential technological advantages but also from their ability to naturally self-assemble into periodic ordered nanostructures. In this article, we emphasize methods by which block copolymer self-assembly can be utilized to rationally design and control the shape and dimension of resulting nanostructures and therefore to develop idealized morphologies. Incorporating these self-organized materials into optoelectronic device fabrication processes or directly into devices will lead to new insights into structure-property relationships and perhaps, ultimately, increases in device efficiency.
C1 [Botiz, Ioan; Darling, Seth B.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Darling, SB (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM darling@anl.gov
RI Botiz, Ioan/I-3209-2012
OI Botiz, Ioan/0000-0002-8555-1084
FU U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences [DE-AC02-06CH11357]
FX Use of the Center for Nanoscale Materials was supported by the U.S.
Department of Energy, Office of Science, Office of Basic Energy
Sciences, under Contract No. DE-AC02-06CH11357.
NR 100
TC 97
Z9 98
U1 5
U2 90
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1369-7021
EI 1873-4103
J9 MATER TODAY
JI Mater. Today
PD MAY
PY 2010
VL 13
IS 5
BP 42
EP 51
PG 10
WC Materials Science, Multidisciplinary
SC Materials Science
GA 588PF
UT WOS:000277083800018
ER
PT J
AU Mun, E
Bud'ko, SL
Torikachvili, MS
Canfield, PC
AF Mun, Eundeok
Bud'ko, Sergey L.
Torikachvili, Milton S.
Canfield, Paul C.
TI Experimental setup for the measurement of the thermoelectric power in
zero and applied magnetic field
SO MEASUREMENT SCIENCE AND TECHNOLOGY
LA English
DT Article
DE thermoelectric power; measurement setup; calibration
ID RAGSB2 R; LA-ND; THERMOPOWER; SM
AB An experimental setup was developed for the measurement of the thermoelectric power (TEP, Seebeck coefficient) in the temperature range from 2 to 350 K and magnetic fields up to 140 kOe. The system was built to fit in a commercial cryostat and is versatile, accurate and automated; using two heaters and two thermometers increases the accuracy of the TEP measurement. High density data of temperature sweeps from 2 to 350 K can be acquired within 16 h and high density data of isothermal field sweeps from 0 to 140 kOe can be obtained within 2 h. Calibrations for the system have been performed on a platinum wire and Bi2Sr2CaCu2O8+delta high-T-c superconductors. The measured TEP of phosphor bronze (voltage lead wire) turns out to be very small; the absolute TEP value of the phosphor bronze wire is much less than 0.5 mu V K-1 below 80 K. For copper and platinum wires measured against the phosphor bronze wire, the agreement between measured results and the literature data is good. To demonstrate the applied magnetic field response of the system, we report measurements of the TEP on single crystal samples of LaAgSb2 and CeAgSb2 in fields up to 140 kOe.
C1 [Mun, Eundeok; Bud'ko, Sergey L.; Canfield, Paul C.] Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
[Mun, Eundeok; Bud'ko, Sergey L.; Canfield, Paul C.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Torikachvili, Milton S.] San Diego State Univ, Dept Phys, San Diego, CA 92182 USA.
RP Mun, E (reprint author), Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
EM canfield@ameslab.gov
RI Canfield, Paul/H-2698-2014
FU Basic Energy Sciences, US Department of Energy [DE-AC02-07CH11358];
National Science Foundation [DMR-0805335]
FX We would like to thank A Kaminski for providing Bi2212 samples, J
Frederick and S A Law for preparing samples RAgSb2 and M E
Tillman, A Kreyssig, M D Vannette, C Martin and M A Tanatar for valuable
discussion on this project.
C8H10N4O2 for this work was
provided, in part, by C Petrovic. Work at Ames Laboratory was supported
by the Basic Energy Sciences, US Department of Energy under contract no
DE-AC02-07CH11358. Milton S Torikachvili gratefully acknowledges the
support of the National Science Foundation under DMR-0805335.
NR 16
TC 25
Z9 25
U1 5
U2 15
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-0233
EI 1361-6501
J9 MEAS SCI TECHNOL
JI Meas. Sci. Technol.
PD MAY
PY 2010
VL 21
IS 5
AR 055104
DI 10.1088/0957-0233/21/5/055104
PG 8
WC Engineering, Multidisciplinary; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 582WS
UT WOS:000276631600025
ER
PT J
AU Lieuwen, T
Richards, G
Weber, J
AF Lieuwen, Tim
Richards, George
Weber, Justin
TI approaching zero
SO MECHANICAL ENGINEERING
LA English
DT Article
C1 [Lieuwen, Tim] Georgia Inst Technol, Atlanta, GA 30332 USA.
[Richards, George; Weber, Justin] Natl Energy Technol Lab, Morgantown, WV USA.
RP Lieuwen, T (reprint author), Georgia Inst Technol, Atlanta, GA 30332 USA.
NR 0
TC 0
Z9 0
U1 1
U2 2
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0025-6501
J9 MECH ENG
JI Mech. Eng.
PD MAY
PY 2010
VL 132
IS 5
BP 22
EP 27
PG 6
WC Engineering, Mechanical
SC Engineering
GA 617AK
UT WOS:000279252900024
ER
PT J
AU Barabash, RI
Tiley, J
Wang, YD
Liaw, PK
AF Barabash, Rozaliya I.
Tiley, Jaimie
Wang, Yandong
Liaw, Peter K.
TI Neutron and X-Ray Studies of Advanced Materials Foreword
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Editorial Material
C1 [Barabash, Rozaliya I.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Tiley, Jaimie] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Wang, Yandong] Northeastern Univ, Shenyang 110004, Peoples R China.
[Liaw, Peter K.] Univ Tennessee, Knoxville, TN 37996 USA.
RP Barabash, RI (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM barabashr@ornl.gov
RI wang, yandong/G-9404-2013
NR 0
TC 0
Z9 0
U1 0
U2 2
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD MAY
PY 2010
VL 41A
IS 5
BP 1109
EP 1109
DI 10.1007/s11661-009-0086-9
PG 1
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 574FO
UT WOS:000275974800006
ER
PT J
AU Zhang, F
Ilavsky, J
Long, GG
Quintana, JPG
Allen, AJ
Jemian, PR
AF Zhang, Fan
Ilavsky, Jan
Long, Gabrielle G.
Quintana, John P. G.
Allen, Andrew J.
Jemian, Pete R.
TI Glassy Carbon as an Absolute Intensity Calibration Standard for
Small-Angle Scattering
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID X-RAY-SCATTERING; DETECTOR; CAMERA; MATTER
AB Absolute calibration of small-angle scattering (SAS) intensity data (measured in terms of the differential scattering cross section per unit sample volume per unit solid angle) is essential for many important aspects of quantitative SAS analysis, such as obtaining the number density, volume fraction, and specific surface area of the scatterers. It also enables scattering data from different instruments (light, X-ray, or neutron scattering) to be combined, and it can even be useful to detect the existence of artifacts in the experimental data. Different primary or secondary calibration methods are available. In the latter case, absolute intensity calibration requires a stable artifact with the necessary scattering profile. Glassy carbon has sometimes been selected as this intensity calibration standard. Here we review the spatial homogeneity and temporal stability of one type of commercially available glassy carbon that is being used as an intensity calibration standard at a number of SAS facilities. We demonstrate that glassy carbon is sufficiently homogeneous and stable during routine use to be relied upon as a suitable standard for absolute intensity calibration of SAS data.
C1 [Zhang, Fan] No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
[Ilavsky, Jan; Long, Gabrielle G.; Quintana, John P. G.; Jemian, Pete R.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Allen, Andrew J.] Natl Inst Stand & Technol, Mat Sci & Engn Lab, Gaithersburg, MD 20899 USA.
RP Zhang, F (reprint author), No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
EM ilavsky@aps.anl.gov
RI Zhang, Fan/A-6133-2010; Ilavsky, Jan/D-4521-2013; USAXS, APS/D-4198-2013
OI Ilavsky, Jan/0000-0003-1982-8900;
FU United States Department of Energy, Office of Science, Office of Basic
Energy Sciences [DE-AC02-06CH11357]
FX We thank Steven Weigand, DND-CAT, for providing the SAXS data collected
at DND-CAT. Portions of this work were performed at the
DuPont-Northwestern-Dow Collaborative Access Team (DND-CAT) located at
Sector 5 of the Advanced Photon Source (APS). DND-CAT is supported by E.
I. DuPont de Nemours and Co., The Dow Chemical Company, and the State of
Illinois. This work and the use of the Advanced Photon Source at Argonne
National Laboratory were supported by the United States Department of
Energy, Office of Science, Office of Basic Energy Sciences, under
Contract No. DE-AC02-06CH11357. We thank David Black, NIST, for
providing the HT glassy carbon sample for the SANS measurement. We
acknowledge the support of the National Institute of Standards and
Technology, United States Department of Commerce, in providing the
neutron research facilities used in this work.
NR 29
TC 97
Z9 97
U1 1
U2 29
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD MAY
PY 2010
VL 41A
IS 5
BP 1151
EP 1158
DI 10.1007/s11661-009-9950-x
PG 8
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 574FO
UT WOS:000275974800012
ER
PT J
AU Woo, W
Ungar, T
Feng, ZL
Kenik, E
Clausen, B
AF Woo, Wanchuck
Ungar, Tamas
Feng, Zhili
Kenik, Edward
Clausen, Bjorn
TI X-Ray and Neutron Diffraction Measurements of Dislocation Density and
Subgrain Size in a Friction-Stir-Welded Aluminum Alloy
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID PROFILE ANALYSIS; PLASTIC-DEFORMATION; GRAIN-STRUCTURE; MICROSTRUCTURE;
PRECIPITATION; CRYSTALS; STRESSES; STRENGTH; CONTRAST
AB The dislocation density and subgrain size were determined in the base material and friction-stir welds of 6061-T6 aluminum alloy. High-resolution X-ray diffraction measurement was performed in the base material. The result of the line profile analysis of the X-ray diffraction peak shows that the dislocation density is about 4.5 x 10(14) m(-2) and the subgrain size is about 200 nm. Meanwhile, neutron diffraction measurements have been performed to observe the diffraction peaks during friction-stir welding (FSW). The deep penetration capability of the neutron enables us to measure the peaks from the midplane of the Al plate underneath the tool shoulder of the friction-stir welds. The peak broadening analysis result using the Williamson-Hall method shows the dislocation density of about 3.2 x 10(15) m(-2) and subgrain size of about 160 nm. The significant increase of the dislocation density is likely due to the severe plastic deformation during FSW. This study provides an insight into understanding the transient behavior of the microstructure under severe thermomechanical deformation.
C1 [Woo, Wanchuck] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Woo, Wanchuck] Korea Atom Energy Res Inst, Div Neutron Sci, Taejon 305353, South Korea.
[Ungar, Tamas] Eotvos Lorand Univ, Dept Gen Phys, H-1518 Budapest, Hungary.
[Feng, Zhili; Kenik, Edward] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Clausen, Bjorn] Los Alamos Natl Lab, Los Alamos Neutron Sci Ctr, Los Alamos, NM 87545 USA.
RP Woo, W (reprint author), Korea Atom Energy Res Inst, Div Neutron Sci, Taejon 305353, South Korea.
EM chuckwoo@kaeri.re.kr
RI Feng, Zhili/H-9382-2012; Clausen, Bjorn/B-3618-2015;
OI Feng, Zhili/0000-0001-6573-7933; Clausen, Bjorn/0000-0003-3906-846X;
WOO, Wanchuck/0000-0003-0350-5357
FU Laboratory Directed Research and Development programme of Oak Ridge
National Laboratory [DE-AC05-00OR22725]; Division of Materials Sciences
and Engineering, Office of Basic Energy Sciences, United States
Department of Energy [DE-AC05-00OR22725]; Korean government; Hungarian
National Science Foundation OTKA [71594, 67692]
FX This research is sponsored by the Laboratory Directed Research and
Development programme of Oak Ridge National Laboratory, managed by
UT-Battelle, LLC for the United States Department of Energy under
Contract No. DE-AC05-00OR22725. Research at the Oak Ridge National
Laboratory SHaRE User Center was supported by the Division of Materials
Sciences and Engineering, Office of Basic Energy Sciences, United States
Department of Energy, under Contract No. DE-AC05-00OR22725 with
UT-Battelle, LLC. One of the authors (WW) is supported by the Nuclear
Research and Development Program, Korea Science and Engineering
Foundation, funded by the Korean government. TU is grateful to the
Hungarian National Science Foundation OTKA Nos. 71594 and 67692. The
authors also thank L. Balogh, T. A. Sisneros, and D. W. Brown for their
help.
NR 27
TC 19
Z9 19
U1 0
U2 20
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD MAY
PY 2010
VL 41A
IS 5
BP 1210
EP 1216
DI 10.1007/s11661-009-9963-5
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 574FO
UT WOS:000275974800020
ER
PT J
AU Jia, N
Nie, ZH
Ren, Y
Peng, RL
Wang, YD
Zhao, X
AF Jia, N.
Nie, Z. H.
Ren, Y.
Peng, R. Lin
Wang, Y. D.
Zhao, X.
TI Formation of Deformation Textures in Face-Centered-Cubic Materials
Studied by In-Situ High-Energy X-Ray Diffraction and Self-Consistent
Model
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID POLYCRYSTALLINE FCC METALS; NEUTRON-DIFFRACTION; PLASTIC-DEFORMATION;
ROLLING TEXTURES; STAINLESS-STEEL; SHEAR BANDS; EVOLUTION; SLIP;
MECHANISM; CRYSTALS
AB The evolution of deformation textures in copper and alpha brass that are representative of fcc metals with different stacking fault energies (SFEs) during cold rolling is predicted using a self-consistent (SC) model. The material parameters used for describing the micromechanical behavior of each metal are determined from the high-energy X-ray (HEXRD) diffraction data. At small reductions, a reliable prediction of the evolution of the grain orientation distribution that is represented as the continuous increase of the copper and brass components is achieved for both metals when compared with the experimental textures. With increasing deformation, the model could characterize the textures of copper, i.e., the strengthening of the copper component, when dislocation slip is still the dominant mechanism. For alpha brass at moderate and large reductions, a reliable prediction of its unique feature of texture evolution, i.e., the weakening of the copper component and the strengthening of the brass component, could only be achieved when proper boundary conditions together with some specified slip/twin systems are considered in the continuum micromechanics mainly containing twinning and shear banding. The present investigation suggests that for fcc metals with a low SFE, the mechanism of shear banding is the dominant contribution to the texture development at large deformations.
C1 [Jia, N.; Nie, Z. H.; Wang, Y. D.; Zhao, X.] Northeastern Univ, Key Lab Anisotropy & Texture Mat MOE, Shenyang 110004, Peoples R China.
[Ren, Y.] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA.
[Peng, R. Lin] Linkoping Univ, Dept Mech Engn, S-58183 Linkoping, Sweden.
[Wang, Y. D.] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 10081, Peoples R China.
RP Jia, N (reprint author), Northeastern Univ, Key Lab Anisotropy & Texture Mat MOE, Shenyang 110004, Peoples R China.
EM nanjia_neu@yahoo.com.cn
RI Nie, Zhihua/G-9459-2013; wang, yandong/G-9404-2013
OI Nie, Zhihua/0000-0002-2533-933X;
FU National Natural Science Foundation of China, Shenyang [50671022,
50771026]; Program for Changjiang Scholars and Innovative Research Team
in University [IRT0713]; National Ministry of Education of China;
National Outstanding Young Scientist Investigation, Shenyang, Liaoning,
China [50725102]; United States Department of Energy, Office of Science
Laboratory [DE-AC02-06CH11357]
FX This work is supported by the National Natural Science Foundation of
China, Shenyang (Grant Nos. 50671022 and 50771026), the Program for
Changjiang Scholars and Innovative Research Team in University ( Grant
No. IRT0713), and the key project supported by the National Ministry of
Education of China. One of the authors (YDW) also acknowledges the
financial support by the National Outstanding Young Scientist
Investigation, Shenyang, Liaoning, China under Grant No. 50725102. This
work has benefited from the use of the APS at the Argonne National
Laboratory, Chicago, IL funded by the United States Department of
Energy, Office of Science Laboratory, under Contract No.
DE-AC02-06CH11357.
NR 26
TC 4
Z9 4
U1 1
U2 10
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD MAY
PY 2010
VL 41A
IS 5
BP 1246
EP 1254
DI 10.1007/s11661-009-0110-0
PG 9
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 574FO
UT WOS:000275974800024
ER
PT J
AU Garlea, E
Clausen, B
Kenik, EA
Ciurchea, D
Vogel, SC
Pang, JWL
Choo, H
AF Garlea, E.
Clausen, B.
Kenik, E. A.
Ciurchea, D.
Vogel, S. C.
Pang, J. W. L.
Choo, H.
TI Intergranular Strain Evolution in a Zircaloy-4 Alloy with Basketweave
Morphology
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID QUANTITATIVE TEXTURE ANALYSIS; TOF DIFFRACTOMETER; HIPPO; BETA;
TRANSFORMATION; REFINEMENT; ZIRCONIUM
AB A Zircaloy-4 alloy with Widmanstatten-Basketweave microstructure has been used to study the deformation behavior at the grain level. The evolution of internal strain and bulk texture is investigated using neutron diffraction and conventional microscopic techniques. The macroscopic behavior and intergranular strain development, parallel and perpendicular to the loading direction, were measured in situ during uniaxial tensile loading. It was observed that twinning plays a major role in both microstructural changes and polycrystalline plasticity.
C1 [Pang, J. W. L.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Ciurchea, D.] Univ Babes Bolyai, Dept Phys, Cluj Napoca 400084, Romania.
[Choo, H.] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
[Garlea, E.; Choo, H.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM garleae@y12.doe.gov
RI Choo, Hahn/A-5494-2009; Clausen, Bjorn/B-3618-2015;
OI Choo, Hahn/0000-0002-8006-8907; Clausen, Bjorn/0000-0003-3906-846X;
Vogel, Sven C./0000-0003-2049-0361
FU National Science Foundation International Materials Institutes Program
[DMR-0231320]; Office of Basic Energy Sciences (United States Department
of Energy (DOE) [DE AC52 06NA25396]
FX One of the authors (EG) acknowledges the support of the National Science
Foundation International Materials Institutes Program (Grant No.
DMR-0231320), Tennessee Advanced Materials Laboratory (TAML) Fellowship
Program, and thanks Professor P. K. Liaw, University of Tennessee, for
his guidance. EG also acknowledges R. L. Bridges, Y-12 National Complex
Security, for help with the metallography. This work has benefited from
the use of the Lujan Neutron Scattering Center, Los Alamos Neutron
Science Center, which is funded by the Office of Basic Energy Sciences
(United States Department of Energy (DOE)). Los Alamos National
Laboratory is operated by Los Alamos National Security LLC under DOE
Contract No. DE AC52 06NA25396. The EBSD analyses were conducted at the
ORNL SHaRE User Facility, which is supported by the Division of
Scientific User Facilities, Office of Science, DOE.
NR 19
TC 7
Z9 7
U1 0
U2 10
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD MAY
PY 2010
VL 41A
IS 5
BP 1255
EP 1260
DI 10.1007/s11661-010-0182-x
PG 6
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 574FO
UT WOS:000275974800025
ER
PT J
AU Soulami, A
Choi, KS
Liu, WN
Sun, X
Khaleel, MA
Ren, Y
Wang, YD
AF Soulami, A.
Choi, K. S.
Liu, W. N.
Sun, X.
Khaleel, M. A.
Ren, Y.
Wang, Y. D.
TI Predicting Fracture Toughness of TRIP 800 Using Phase Properties
Characterized by In-Situ High-Energy X-Ray Diffraction
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID INDUCED PLASTICITY TRIP; MARTENSITIC-TRANSFORMATION;
DEFORMATION-BEHAVIOR; STEELS; MODEL; RESISTANCE; DUCTILITY; MICRO
AB Transformation-induced plasticity (TRIP) steel is a typical representative of first generation advanced high-strength steel, which exhibits a combination of high strength and excellent ductility due to its multiphase microstructure. In this article, we study the crack propagation behavior and fracture resistance of a TRIP 800 steel using a microstructure-based finite element method with the various phase properties characterized by in-situ high-energy X-ray diffraction (HEXRD) technique. Uniaxial tensile tests on the notched TRIP 800 sheet specimens were also conducted, and the experimentally measured tensile properties and R curves (resistance curves) were used to calibrate the modeling parameters and to validate the overall modeling results. The comparison between the simulated and experimentally measured results suggests that the micromechanics based modeling procedure can well capture the overall complex crack propagation behaviors and the fracture resistance of TRIP steels. The methodology adopted here may be used to estimate the fracture resistance of various multiphase materials.
C1 [Soulami, A.; Choi, K. S.; Liu, W. N.; Sun, X.; Khaleel, M. A.] Pacific NW Natl Lab, Computat Sci & Math Div, Richland, WA 99352 USA.
[Ren, Y.] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA.
[Wang, Y. D.] Northeastern Univ, Dept Mat Sci, Shenyang 110004, Peoples R China.
RP Sun, X (reprint author), Pacific NW Natl Lab, Computat Sci & Math Div, Richland, WA 99352 USA.
EM xin.sun@pnl.gov
RI wang, yandong/G-9404-2013;
OI khaleel, mohammad/0000-0001-7048-0749
FU United States Department of Energy [DE-AC05-76RL01830,
DE-AC02-06CH11357]; Department of Energy Office of FreedomCAR and
Vehicle Technologies
FX Pacific Northwest National Laboratory is operated by Battelle Memorial
Institute for the United States Department of Energy under Contract No.
DE-AC05-76RL01830. This work was funded by the Department of Energy
Office of FreedomCAR and Vehicle Technologies under the Automotive
Lightweighting Materials Program, managed by Dr. Joseph Carpenter. Use
of the APS, Argonne National Laboratory, was supported by the United
States Department of Energy, Office of Science, Office of Basic Energy
Sciences, under Contract No. DE-AC02-06CH11357. The authors acknowledge
the help of Messrs. John Serkowski and Tao Fu for their help in
generating the finite element mesh.
NR 25
TC 4
Z9 4
U1 2
U2 8
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD MAY
PY 2010
VL 41A
IS 5
BP 1261
EP 1268
DI 10.1007/s11661-010-0208-4
PG 8
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 574FO
UT WOS:000275974800026
ER
PT J
AU Wang, G
Wang, YD
Ren, Y
Li, DX
Liu, YD
Liaw, PK
AF Wang, Gang
Wang, Yan-Dong
Ren, Yang
Li, Dexin
Liu, Yandong
Liaw, Peter K.
TI In-Situ High-Energy X-Ray Diffuse-Scattering Study of the Phase
Transition of Ni2MnGa Single Crystal under High Magnetic Field
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID SHAPE-MEMORY ALLOY; MARTENSITIC-TRANSFORMATION; MAGNETOCRYSTALLINE
ANISOTROPY; INDUCED STRAIN; TEMPERATURE; GROWTH; MICROSTRUCTURE;
PRESSURE; TEXTURES; STRESS
AB The defects-related microstructural features connected to the premartensitic and martensitic transition of a Ni2MnGa single crystal under a high magnetic field of 50 KOe applied along the [1 (1) over bar0] crystallographic direction of the Heusler phase were studied by the in-situ high-energy X-ray diffuse-scattering experiments on the high energy synchrotron beam line 11-ID-C of APS and thermomagnetization measurements. Our experiments show that a magnetic field of 50 KOe applied along the [1 (1) over bar0] direction of the parent Heusler phase can promote the premartensitic transition of Ni2MnGa single crystal, but puts off martensite transition and the reverse transition. The premartensitic transition temperature (T-PM) increases from 233 to 250 K (-40 to -23 degrees C). The martensite transition start temperature (M-s) decreases from 175 to 172 K (-98 to -101 degrees C), while the reverse transition start temperature (A(s)) increases from 186 to 189 K (-87 to -84 degrees C). The high magnetic field leads to a rapid rearrangement of martensite variants below the martensite transition finish temperature (M-f). The real transition process of Ni2MnGa single crystal under the high magnetic field was in-situ traced.
C1 [Wang, Gang; Wang, Yan-Dong; Liu, Yandong] Northeastern Univ, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110004, Peoples R China.
[Ren, Yang] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA.
[Li, Dexin] Tohoku Univ, Inst Mat Res, Oarai, Ibaraki 3111313, Japan.
[Liaw, Peter K.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
RP Liu, YD (reprint author), Northeastern Univ, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110004, Peoples R China.
EM ydliu@mail.neu.edu.cn
RI wang, yandong/G-9404-2013; li, dexin/B-9982-2011
FU National Natural Science Foundation of China [50871027, 50725102,
50501005]; 111 Project of China [B07015]; Liaoning BaiQianWan Talents
Program; Natural Science Foundation of Liaoning, China [20042024];
National Science Foundation International Materials Institutes (IMI)
[DMR-0231320]; United States Department of Energy, Office of Science,
Office of Basic Energy Sciences [DE-AC02-06CH11357]
FX This work is supported by the National Natural Science Foundation of
China (Grant Nos. 50871027, 50725102, and 50501005). This work is also
supported by the 111 Project of China (Grant No. B07015), Liaoning
BaiQianWan Talents Program, and Natural Science Foundation of Liaoning,
China (Grant No. 20042024). One of the authors (PKL) thanks the
financial support of the National Science Foundation International
Materials Institutes (IMI) Program (Grant No. DMR-0231320), Dr. C.
Huber, Program Director. Use of the Advanced Photon Source was supported
by the United States Department of Energy, Office of Science, Office of
Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
NR 28
TC 1
Z9 1
U1 1
U2 12
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD MAY
PY 2010
VL 41A
IS 5
BP 1269
EP 1275
DI 10.1007/s11661-009-0108-7
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 574FO
UT WOS:000275974800027
ER
PT J
AU Bogard, DD
Dixon, ET
Garrison, DH
AF Bogard, Donald D.
Dixon, Eleanor T.
Garrison, Daniel H.
TI Ar-Ar ages and thermal histories of enstatite meteorites
SO METEORITICS & PLANETARY SCIENCE
LA English
DT Article
ID CHONDRITE PARENT BODY; IMPACT-MELT BRECCIAS; I-XE; RUBIDIUM-STRONTIUM;
ACAPULCO METEORITE; SYSTEMATIC-ERRORS; AR-39-AR-40 AGES; AR-40/AR-39
AGE; IRON-METEORITES; PLAGIOCLASE
AB Compared with ordinary chondrites, there is a relative paucity of chronological and other data to define the early thermal histories of enstatite parent bodies. In this study, we report (39)Ar-(40)Ar dating results for five EL chondrites: Khairpur, Pillistfer, Hvittis, Blithfield, and Forrest; five EH chondrites: Parsa, Saint Marks, Indarch, Bethune, and Reckling Peak 80259; three igneous-textured enstatite meteorites that represent impact melts on enstatite chondrite parent bodies: Zaklodzie, Queen Alexandra Range 97348, and Queen Alexandra Range 97289; and three aubrites, Norton County, Bishopville, and Cumberland Falls Several Ar-Ar age spectra show unusual (39)Ar recoil effects, possibly the result of some of the K residing in unusual sulfide minerals, such as djerfisherite and rodderite, and other age spectra show (40)Ar diffusion loss. Few additional Ar-Ar ages for enstatite meteorites are available in the literature. When all available Ar-Ar data on enstatite meteorites are considered, preferred ages of nine chondrites and one aubrite show a range of 4.50-4.54 Ga, whereas five other meteorites show only lower age limits over 4.35-4.46 Ga. Ar-Ar ages of several enstatite chondrites are as old or older as the oldest Ar-Ar ages of ordinary chondrites, which suggests that enstatite chondrites may have derived from somewhat smaller parent bodies, or were metamorphosed to lower temperatures compared to other chondrite types. Many enstatite meteorites are brecciated and/or shocked, and some of the younger Ar-Ar ages may record these impact events. Although impact heating of ordinary chondrites within the last 1 Ga is relatively common for ordinary chondrites, only Bethune gives any significant evidence for such a young event.
C1 [Bogard, Donald D.] NASA, Lyndon B Johnson Space Ctr, ARES Code KR, Houston, TX 77058 USA.
[Dixon, Eleanor T.] US DOE, Natl Nucl Secur Adm, Washington, DC 20585 USA.
[Garrison, Daniel H.] Barrios Technol JE23, Houston, TX 77058 USA.
RP Bogard, DD (reprint author), NASA, Lyndon B Johnson Space Ctr, ARES Code KR, Houston, TX 77058 USA.
EM donbogard@comcast.net
FU NASA's Cosmochemistry Program; National Research Council
FX We appreciate helpful review comments by A. Rubin, M. Trieloff, and T.
Swindle. For furnishing samples, we thank E. Olsen of the Chicago Field
Museum of Natural history, C. Moore of the Arizona State Center for
Meteorite Studies, R. Hutchison of the British Museum of Natural
History, T. McCoy of the Smithsonian Institution, K. Keil and colleagues
at the University of Hawaii, A. Reid and the University of Cape Town,
and the U.S. Antarctic Meteorite Program. This research was supported by
NASA's Cosmochemistry Program. ETD acknowledges support from the
National Research Council for a NASA postdoctoral fellowship.
NR 84
TC 14
Z9 14
U1 0
U2 5
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1086-9379
J9 METEORIT PLANET SCI
JI Meteorit. Planet. Sci.
PD MAY
PY 2010
VL 45
IS 5
BP 723
EP 742
DI 10.1111/j.1945-5100.2010.01060.x
PG 20
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 648TB
UT WOS:000281715900002
ER
PT J
AU Lasue, J
Stepinski, T
Bell, SW
AF Lasue, Jeremie
Stepinski, Tomasz
Bell, Samuel W.
TI Automated classification of interplanetary dust particles: Johnson Space
Center Cosmic Dust Catalog Volume 15
SO METEORITICS & PLANETARY SCIENCE
LA English
DT Article
ID STRATOSPHERE; CHONDRITES; COLLECTION; SAMPLES
AB The "Cosmic Dust Catalog," published by the NASA Johnson Space Center (JSC), describes thousands of interplanetary dust particles subjected to preliminary analysis and with labels indicating their origin. However, only about 80% of the particles are assigned unambiguous labels, the labels of the remaining 20% being uncertain. In addition, the Stardust mission results opened up the possibility that some particles classified as terrestrial contaminants are instead of cosmic (cometary) origin. In this article, we present a methodology for automatic classification of particles on the basis of similarity of their X-ray energy dispersive spectrometry spectra. The method is applied to the 467 particles constituting Volume 15 of the catalog. A first part of the analysis is to digitize the spectra from their scanned images. The digitized spectra are subjected to agglomerative clustering, which reveals 16 distinct clusters or compositional types of particles. The Sammon's map is used to visualize the relationship between different clusters; 6 clusters corresponding to cosmic particles and 10 clusters corresponding to terrestrial contaminants are clearly separated on the map indicating overall differences between diverse spectra of cosmic and terrestrial particles. By reconciling labels with the clustering structures, we propose the relabeling of 155 particles including the relabeling of 31 terrestrial contaminants into cosmic particles. The proposed relabeling needs to be confirmed by in-depth study of these particles. The paucity of particles with firmly determined cometary or asteroidal origin makes it difficult to establish whether the spectra based autoclassification can be utilized to discriminate between cometary and asteroidal particles. The methodology presented here can be used to classify all particles published in the catalog, as well as different samples for which comparable spectra are available.
C1 [Lasue, Jeremie; Stepinski, Tomasz; Bell, Samuel W.] Lunar & Planetary Inst, Houston, TX 77058 USA.
[Lasue, Jeremie] LANL, Space Sci & Applicat, Los Alamos, NM 87545 USA.
[Bell, Samuel W.] Amherst Coll, Amherst, MA 01002 USA.
RP Lasue, J (reprint author), Lunar & Planetary Inst, 3600 Bay Area Blvd, Houston, TX 77058 USA.
EM lasue@lpi.usra.edu
FU USRA [CAN-NCC5-679]; LPI [1536]
FX The authors are grateful to Michael Zolensky, Keiko Nakamura-Messenger,
Guillaume Renier, Allan Treiman, Karl Kehm, and Daniel Durda for
fruitful discussions. The authors acknowledge Donald Brownlee, Christine
Floss, George Flynn, and Scott Messenger for useful comments on the
manuscript. S. W. Bell acknowledges support from the Lunar and Planetary
Institute Summer Intern Program. This research was conducted at the
Lunar and Planetary Institute, which is operated by the USRA under
contract CAN-NCC5-679 with NASA. This is LPI Contribution no. 1536.
NR 34
TC 3
Z9 3
U1 0
U2 0
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1086-9379
EI 1945-5100
J9 METEORIT PLANET SCI
JI Meteorit. Planet. Sci.
PD MAY
PY 2010
VL 45
IS 5
BP 783
EP 797
DI 10.1111/j.1945-5100.2010.01059.x
PG 15
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 648TB
UT WOS:000281715900005
ER
PT J
AU Greve, A
Olsen, J
Privorotskaya, N
Senesac, L
Thundat, T
King, WP
Boisen, A
AF Greve, A.
Olsen, J.
Privorotskaya, N.
Senesac, L.
Thundat, T.
King, W. P.
Boisen, A.
TI Micro-calorimetric sensor for vapor phase explosive detection with
optimized heat profile
SO MICROELECTRONIC ENGINEERING
LA English
DT Article; Proceedings Paper
CT 35th International Conference on Micro-and Nano-Engineering
CY SEP 28-OCT 01, 2009
CL Ghent, BELGIUM
DE Calorimetry; Explosive detection; Micro-heater
AB A heater design, used in a micro-calorimetric sensor, has been optimized for temperature uniformity in order to increase the sensitivity and reliability of detection of trace amounts of explosives. In this abstract the design, fabrication and characterization is described. The performance of the novel heater design is characterized by measuring the temperature coefficient of resistivity (TCR) values and by mapping the temperature distribution using Raman spectroscopy. The new heater design is seen to have increased the temperature uniformity by a factor of 2.3. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Greve, A.; Olsen, J.; Boisen, A.] Tech Univ Denmark, Dept Micro & Nanotechnol, DK-2800 Lyngby, Denmark.
[Privorotskaya, N.; King, W. P.] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
[Senesac, L.; Thundat, T.] Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN USA.
RP Olsen, J (reprint author), Tech Univ Denmark, Dept Micro & Nanotechnol, DK-2800 Lyngby, Denmark.
EM jkol@nanotech.dtu.dk
RI Boisen, Anja/F-9442-2011
OI Boisen, Anja/0000-0002-9918-6567
NR 6
TC 10
Z9 10
U1 1
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-9317
J9 MICROELECTRON ENG
JI Microelectron. Eng.
PD MAY-AUG
PY 2010
VL 87
IS 5-8
BP 696
EP 698
DI 10.1016/j.mee.2009.12.069
PG 3
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Optics; Physics, Applied
SC Engineering; Science & Technology - Other Topics; Optics; Physics
GA 578NO
UT WOS:000276300700003
ER
PT J
AU Resnick, PJ
Holland, CE
Schwoebel, PR
Hertz, KL
Chichester, DL
AF Resnick, P. J.
Holland, C. E.
Schwoebel, P. R.
Hertz, K. L.
Chichester, D. L.
TI An integrated field emission array for ion desorption
SO MICROELECTRONIC ENGINEERING
LA English
DT Article; Proceedings Paper
CT 35th International Conference on Micro-and Nano-Engineering
CY SEP 28-OCT 01, 2009
CL Ghent, BELGIUM
DE Field emission; Ion desorption; Tip; Array
AB Field emission arrays that are used for ion desorption must be capable of operating at high applied voltages. The large electric fields can lead to dielectric breakdown or electron emission from the gate, both of which may result in catastrophic failure. Methods were developed to fabricate tip arrays with integrated gate electrodes, separated from the substrate with sufficient dielectric to sustain high voltages. To suppress gate electron emission, processes were developed to fabricate geometries that favor high fields at the tip while minimizing the field at the gate. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Resnick, P. J.] Sandia Natl Labs, Albuquerque, NM 87123 USA.
[Holland, C. E.] SRI Int, Menlo Pk, CA 94025 USA.
[Schwoebel, P. R.] Univ New Mexico, Albuquerque, NM 87131 USA.
[Hertz, K. L.] Sandia Natl Labs, Livermore, CA 94551 USA.
[Chichester, D. L.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Resnick, PJ (reprint author), Sandia Natl Labs, Albuquerque, NM 87123 USA.
EM resnicpj@sandia.gov
NR 5
TC 7
Z9 7
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-9317
J9 MICROELECTRON ENG
JI Microelectron. Eng.
PD MAY-AUG
PY 2010
VL 87
IS 5-8
BP 1263
EP 1265
DI 10.1016/j.mee.2009.11.036
PG 3
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Optics; Physics, Applied
SC Engineering; Science & Technology - Other Topics; Optics; Physics
GA 578NO
UT WOS:000276300700146
ER
PT J
AU Cagle, C
Feng, G
Qiao, R
Huang, JS
Sumpter, BG
Meunier, V
AF Cagle, Clint
Feng, Guang
Qiao, Rui
Huang, Jingsong
Sumpter, Bobby G.
Meunier, Vincent
TI Structure and charging kinetics of electrical double layers at large
electrode voltages
SO MICROFLUIDICS AND NANOFLUIDICS
LA English
DT Article
ID POISSON-BOLTZMANN THEORY; MONTE-CARLO-SIMULATION; MOLECULAR SIMULATION;
DYNAMICS; METAL; INTERFACE; SYSTEMS; WATER; MODEL
AB The structure and charging kinetics of electrical double layers (EDLs) at interfaces of NaCl solutions and planar electrodes are studied by molecular dynamics (MD) and Poisson-Nernst-Planck (PNP) simulations. Based on the MD results and prior experimental data, we show that counterion packing in planar EDLs does not reach the steric limit at electrode voltages below 1 V. In addition, we demonstrate that a PNP model, when complemented with a Stern model, can be effectively used to capture the overall charging kinetics. However, the PNP/Stern model can only give a qualitative description of the fine features of the EDL.
C1 [Cagle, Clint; Feng, Guang; Qiao, Rui] Clemson Univ, Coll Engn & Sci, Clemson, SC 29634 USA.
[Huang, Jingsong; Sumpter, Bobby G.; Meunier, Vincent] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Qiao, R (reprint author), Clemson Univ, Coll Engn & Sci, Clemson, SC 29634 USA.
EM rqiao@clemson.edu
RI Huang, Jingsong/A-2789-2008; Qiao, Rui/B-2350-2009; Feng,
Guang/D-8989-2011; Meunier, Vincent/F-9391-2010; Sumpter,
Bobby/C-9459-2013;
OI Huang, Jingsong/0000-0001-8993-2506; Qiao, Rui/0000-0001-5219-5530;
Meunier, Vincent/0000-0002-7013-179X; Sumpter,
Bobby/0000-0001-6341-0355; Feng, Guang/0000-0001-6659-9181
FU NSF [CBET-0756496]; Oak Ridge National Laboratory (ORNL); U.S.
Department of Energy [DEAC05-00OR22725]
FX R. Q. thanks Professor Bazant at MIT for helpful discussions. The
authors thank the Clemson-CCIT office for providing computer time. The
Clemson authors acknowledge support from NSF under grant No.
CBET-0756496. R. Q. was partly supported by an appointment to the HERE
program for faculty at the Oak Ridge National Laboratory (ORNL)
administered by ORISE. The authors at ORNL gratefully acknowledge the
support from the Laboratory Directed Research and Development Program of
ORNL and from U.S. Department of Energy under Contract No.
DEAC05-00OR22725 with UT-Battelle, LLC at ORNL.
NR 30
TC 11
Z9 11
U1 2
U2 22
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 1613-4982
J9 MICROFLUID NANOFLUID
JI Microfluid. Nanofluid.
PD MAY
PY 2010
VL 8
IS 5
BP 703
EP 708
DI 10.1007/s10404-009-0542-2
PG 6
WC Nanoscience & Nanotechnology; Instruments & Instrumentation; Physics,
Fluids & Plasmas
SC Science & Technology - Other Topics; Instruments & Instrumentation;
Physics
GA 580TW
UT WOS:000276474300014
ER
PT J
AU Lee, CW
Nam, KW
Cho, BW
Kim, KB
AF Lee, Chang-Wook
Nam, Kyung-Wan
Cho, Byung-Won
Kim, Kwang-Bum
TI Electrochemical synthesis of meso-structured lamellar manganese oxide
thin film
SO MICROPOROUS AND MESOPOROUS MATERIALS
LA English
DT Article
DE Meso-structured lamellar MnO2; Sodium dodecyl sulfate (SDS); Anodic
potentiostatic deposition; UV/ozone treatment; Electrochemically
prepared meso-structure
ID MESOPOROUS MOLECULAR-SIEVES; LITHIUM INSERTION; DODECYL-SULFATE;
PLATINUM FILMS; VANADIUM-OXIDE; ELECTRODEPOSITION; DEPOSITION; DIOXIDE;
PERFORMANCE; BIRNESSITE
AB Meso-structured lamellar manganese oxide thin films were prepared electrochemically using an anodic potentiostatic deposition method in a dilute surfactant solution of sodium dodecyl sulfate. The effects of the deposition potential, surfactant type, surfactant concentration and concentration of manganese ions on the electrochemical preparation of the meso-structured manganese oxide thin films were examined. Meso-structured lamellar MnO2 was formed only in the solution containing 0.1 M MnSO4 and 5 wt.% SIDS. The UV/ozone treatment could successfully remove most of the surfactant template under non-thermal conditions without destroying the as-synthesized lamellar meso-structure of MnO2. Small-angle XRD and HRTEM confirmed the meso-structured lamellar biphase with a repeat unit of 3.75 and 3.01 nm, respectively. (C) 2009 Elsevier Inc. All rights reserved.
C1 [Lee, Chang-Wook; Kim, Kwang-Bum] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea.
[Nam, Kyung-Wan] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
[Cho, Byung-Won] Korea Inst Sci & Technol, Econano Res Ctr, Seoul 136791, South Korea.
RP Kim, KB (reprint author), Yonsei Univ, Dept Mat Sci & Engn, 134 Shinchon Dong, Seoul 120749, South Korea.
EM kbkim@yonsei.ac.kr
RI Nam, Kyung-Wan/E-9063-2015; Nam, Kyung-Wan Nam/G-9271-2011; Nam,
Kyung-Wan/B-9029-2013
OI Nam, Kyung-Wan/0000-0001-6278-6369; Nam, Kyung-Wan/0000-0001-6278-6369
FU Korea Science and Engineering Foundation (KOSEF) [R0A-2007-000-10042-0];
Ministry of Science and Technology [R0A-2007-000-10042-0]; US Department
of Energy [DEAC02-98CH10886]
FX This work was supported by Korea Science and Engineering Foundation
(KOSEF) through the National Research Lab. Program funded by the
Ministry of Science and Technology (No. R0A-2007-000-10042-0). The work
at Brookhaven National Lab. was supported by the Assistant Secretary for
Energy Efficiency and Renewable Energy, Office of Vehicle Technologies,
under the program of "Hybrid and Electric Systems", of the US Department
of Energy under Contract Number DEAC02-98CH10886.
NR 48
TC 10
Z9 11
U1 0
U2 21
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1387-1811
EI 1873-3093
J9 MICROPOR MESOPOR MAT
JI Microporous Mesoporous Mat.
PD MAY
PY 2010
VL 130
IS 1-3
BP 208
EP 214
DI 10.1016/j.micromeso.2009.11.008
PG 7
WC Chemistry, Applied; Chemistry, Physical; Nanoscience & Nanotechnology;
Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 570UC
UT WOS:000275702600029
ER
PT J
AU Alkass, K
Buchholz, BA
Ohtani, S
Yamamoto, T
Druid, H
Spalding, KL
AF Alkass, Kanar
Buchholz, Bruce A.
Ohtani, Susumu
Yamamoto, Toshiharu
Druid, Henrik
Spalding, Kirsty L.
TI Age Estimation in Forensic Sciences APPLICATION OF COMBINED ASPARTIC
ACID RACEMIZATION AND RADIOCARBON ANALYSIS
SO MOLECULAR & CELLULAR PROTEOMICS
LA English
DT Article; Proceedings Paper
CT 9th International Symposium on Mass Spectrometry in the Health and Life
Sciences
CY AUG 23-27, 2009
CL San Francisco, CA
ID BOMB C-14 DATA; SAMPLE PREPARATION; NUCLEAR TESTS; ION-SOURCE; AMS;
DENTIN; RATIOS; CONTAMINATION; CALIBRATION; CAMS/LLNL
AB Age determination of unknown human bodies is important in the setting of a crime investigation or a mass disaster because the age at death, birth date, and year of death as well as gender can guide investigators to the correct identity among a large number of possible matches. Traditional morphological methods used by anthropologists to determine age are often imprecise, whereas chemical analysis of tooth dentin, such as aspartic acid racemization, has shown reproducible and more precise results. In this study, we analyzed teeth from Swedish individuals using both aspartic acid racemization and radiocarbon methodologies. The rationale behind using radiocarbon analysis is that aboveground testing of nuclear weapons during the cold war (1955-1963) caused an extreme increase in global levels of carbon-14 (14C), which has been carefully recorded over time. Forty-four teeth from 41 individuals were analyzed using aspartic acid racemization analysis of tooth crown dentin or radiocarbon analysis of enamel, and 10 of these were split and subjected to both radiocarbon and racemization analysis. Combined analysis showed that the two methods correlated well (R(2) = 0.66, p < 0.05). Radiocarbon analysis showed an excellent precision with an overall absolute error of 1.0 +/- 0.6 years. Aspartic acid racemization also showed a good precision with an overall absolute error of 5.4 +/- 4.2 years. Whereas radiocarbon analysis gives an estimated year of birth, racemization analysis indicates the chronological age of the individual at the time of death. We show how these methods in combination can also assist in the estimation of date of death of an unidentified victim. This strategy can be of significant assistance in forensic casework involving dead victim identification. Molecular & Cellular Proteomics 9:1022-1030, 2010.
C1 [Spalding, Kirsty L.] Karolinska Inst, Dept Cell & Mol Biol, Med Nobel Inst, SE-17177 Stockholm, Sweden.
[Alkass, Kanar; Druid, Henrik] Karolinska Inst, Dept Forens Med, SE-17177 Stockholm, Sweden.
[Buchholz, Bruce A.] Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94551 USA.
[Ohtani, Susumu] Kanagawa Dent Coll, Inst Frontier Oral Sci, Kanagawa 2388580, Japan.
[Yamamoto, Toshiharu] Kanagawa Dent Coll, Dept Human Biol, Kanagawa 2388580, Japan.
RP Spalding, KL (reprint author), Karolinska Inst, Dept Cell & Mol Biol, Med Nobel Inst, SE-17177 Stockholm, Sweden.
EM kirsty.spalding@ki.se
RI Buchholz, Bruce/G-1356-2011;
OI Druid, Henrik/0000-0002-9198-023X
FU NCRR NIH HHS [RR13461, P41 RR013461]
NR 28
TC 19
Z9 21
U1 2
U2 24
PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA
SN 1535-9476
J9 MOL CELL PROTEOMICS
JI Mol. Cell. Proteomics
PD MAY
PY 2010
VL 9
IS 5
BP 1022
EP 1030
DI 10.1074/mcp.M900525-MCP200
PG 9
WC Biochemical Research Methods
SC Biochemistry & Molecular Biology
GA 618ZX
UT WOS:000279396700022
PM 19965905
ER
PT J
AU Reid, BA
Percival, WJ
Eisenstein, DJ
Verde, L
Spergel, DN
Skibba, RA
Bahcall, NA
Budavari, T
Frieman, JA
Fukugita, M
Gott, JR
Gunn, JE
Ivezic, Z
Knapp, GR
Kron, RG
Lupton, RH
McKay, TA
Meiksin, A
Nichol, RC
Pope, AC
Schlegel, DJ
Schneider, DP
Stoughton, C
Strauss, MA
Szalay, AS
Tegmark, M
Vogeley, MS
Weinberg, DH
York, DG
Zehavi, I
AF Reid, Beth A.
Percival, Will J.
Eisenstein, Daniel J.
Verde, Licia
Spergel, David N.
Skibba, Ramin A.
Bahcall, Neta A.
Budavari, Tamas
Frieman, Joshua A.
Fukugita, Masataka
Gott, J. Richard
Gunn, James E.
Ivezic, Zeljko
Knapp, Gillian R.
Kron, Richard G.
Lupton, Robert H.
McKay, Timothy A.
Meiksin, Avery
Nichol, Robert C.
Pope, Adrian C.
Schlegel, David J.
Schneider, Donald P.
Stoughton, Chris
Strauss, Michael A.
Szalay, Alexander S.
Tegmark, Max
Vogeley, Michael S.
Weinberg, David H.
York, Donald G.
Zehavi, Idit
TI Cosmological constraints from the clustering of the Sloan Digital Sky
Survey DR7 luminous red galaxies
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE cosmology: observations; large-scale structure of Universe; galaxies:
haloes; galaxies: statistics
ID HALO OCCUPATION DISTRIBUTION; LARGE-SCALE STRUCTURE; SPECTROSCOPIC
TARGET SELECTION; POWER-SPECTRUM ANALYSIS; PROBE WMAP OBSERVATIONS;
HUBBLE-SPACE-TELESCOPE; BARYON ACOUSTIC PEAK; SURVEY IMAGING DATA;
REDSHIFT-SPACE; DATA RELEASE
AB We present the power spectrum of the reconstructed halo density field derived from a sample of luminous red galaxies (LRGs) from the Sloan Digital Sky Survey (SDSS) Seventh Data Release (DR7). The halo power spectrum has a direct connection to the underlying dark matter power for k <= 0.2 h Mpc(-1), well into the quasi-linear regime. This enables us to use a factor of similar to 8 more modes in the cosmological analysis than an analysis with k(max) = 0.1 h Mpc(-1), as was adopted in the SDSS team analysis of the DR4 LRG sample. The observed halo power spectrum for 0.02< k < 0.2 h Mpc(-1) is well fitted by our model: chi(2) = 39.6 for 40 degrees of freedom for the best-fitting Lambda cold dark matter (Lambda CDM) model. We find Omega(m)h(2)(n(s)/0.96)(1.2) = 0.141(-0.012+)(0.010) for a power-law primordial power spectrum with spectral index ns and Omega(b)h(2) = 0.022 65 fixed, consistent with cosmic microwave background measurements. The halo power spectrum also constrains the ratio of the comoving sound horizon at the baryon-drag epoch to an effective distance to z = 0.35: r(s)/DV(0.35) = 0.1097(-0.0042)(+0.0039). Combining the halo power spectrum measurement with the Wilkinson Microwave Anisotropy Probe (WMAP) 5 year results, for the flat Lambda CDM model we find Omega(m) = 0.289 +/- 0.019 and H-0 = 69.4 +/- 1.6 kms(-1) Mpc(-1). Allowing for massive neutrinos in Lambda CDM, we find Sigma m(nu) < 0.62 eV at the 95 per cent confidence level. If we instead consider the effective number of relativistic species N-eff as a free parameter, we find N-eff = 4.8(-1.7)(+1.8). Combining also with the Kowalski et al. supernova sample, we find Omega(tot) = 1.011 +/- 0.009 and w = -0.99 +/- 0.11 for an open cosmology with constant dark energy equation of state w. The power spectrum and a module to calculate the likelihoods are publicly available at http://lambda.gsfc.nasa.gov/toolbox/lrgdr/.
C1 [Reid, Beth A.; Verde, Licia] UAB, IEEC, CSIC, Inst Space Sci, Barcelona 08193, Spain.
[Reid, Beth A.; Verde, Licia] Univ Barcelona, Inst Sci Cosmos ICC, E-08028 Barcelona, Spain.
[Reid, Beth A.; Spergel, David N.; Bahcall, Neta A.; Gott, J. Richard; Gunn, James E.; Knapp, Gillian R.; Lupton, Robert H.; Strauss, Michael A.] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
[Percival, Will J.; Nichol, Robert C.] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth P01 2EG, Hants, England.
[Eisenstein, Daniel J.] Univ Arizona, Steward Observ, Tucson, AZ 85121 USA.
[Verde, Licia] ICREA, Barcelona 08010, Spain.
[Spergel, David N.] Princeton Univ, Princeton Ctr Theoret Sci, Princeton, NJ 08542 USA.
[Skibba, Ramin A.] Max Planck Inst Astron, D-69117 Heidelberg, Germany.
[Budavari, Tamas; Szalay, Alexander S.] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
[Frieman, Joshua A.] Ctr Particle Astrophys, Fermilab, Batavia, IL 60510 USA.
[Frieman, Joshua A.] Univ Chicago, Kavli Inst Cosmol Phys, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[Fukugita, Masataka] Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan.
[Ivezic, Zeljko] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
[Kron, Richard G.; York, Donald G.] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60615 USA.
[McKay, Timothy A.] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
[McKay, Timothy A.] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA.
[Meiksin, Avery] Univ Edinburgh, Inst Astron, Royal Observ, SUPA, Edinburgh EH9 3HJ, Midlothian, Scotland.
[Pope, Adrian C.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Schlegel, David J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Schneider, Donald P.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Tegmark, Max] MIT, Dept Phys, Cambridge, MA 02139 USA.
[Vogeley, Michael S.] Drexel Univ, Dept Phys, Philadelphia, PA 19104 USA.
[Weinberg, David H.] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
[York, Donald G.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60615 USA.
[Zehavi, Idit] Case Western Reserve Univ, Dept Astron, Cleveland, OH 44106 USA.
RP Reid, BA (reprint author), UAB, IEEC, CSIC, Inst Space Sci, Barcelona 08193, Spain.
EM beth.ann.reid@gmail.com
RI McKay, Timothy/C-1501-2009; Spergel, David/A-4410-2011;
OI McKay, Timothy/0000-0001-9036-6150; Meiksin, Avery/0000-0002-5451-9057;
Verde, Licia/0000-0003-2601-8770
NR 100
TC 400
Z9 403
U1 0
U2 20
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
EI 1365-2966
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD MAY 1
PY 2010
VL 404
IS 1
BP 60
EP 85
DI 10.1111/j.1365-2966.2010.16276.x
PG 26
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 584ZU
UT WOS:000276794600030
ER
PT J
AU Stril, A
Cahn, RN
Linder, EV
AF Stril, Arthur
Cahn, Robert N.
Linder, Eric V.
TI Testing standard cosmology with large-scale structure
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE cosmological parameters; cosmology: observations; large-scale structure
of Universe
ID REDSHIFT-SPACE DISTORTIONS; LUMINOUS RED GALAXIES; POWER-SPECTRUM;
GRAVITY; PROBE
AB The galaxy power spectrum contains information on the growth of structure, the growth rate through redshift space distortions and the cosmic expansion through baryon acoustic oscillation features. We study the ability of two proposed experiments, BigBOSS and JDEM-PS, to test the cosmological model and general relativity. We quantify the latter result in terms of the gravitational growth index., whose value in general relativity is gamma approximate to 0.55. Significant deviations from this value could indicate new physics beyond the standard model of cosmology. The results show that BigBOSS (JDEM-PS) would be capable of measuring. with an uncertainty sigma(gamma) = 0.043 (0.054), which tightens to sigma(gamma) = 0.031 (0.038) if we include Stage III data priors, marginalizing over neutrino mass, time-varying dark energy equation of state, and other parameters. For all dark energy parameters and related figures of merit, the two experiments give comparable results. We also carry out some studies of the influence of redshift range, resolution, treatment of non-linearities and bias evolution to enable further improvement.
C1 [Stril, Arthur] Ecole Normale Super, Dept Phys, F-75005 Paris, France.
[Stril, Arthur; Cahn, Robert N.; Linder, Eric V.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Linder, Eric V.] Ewha Womans Univ, Inst Early Universe, Seoul, South Korea.
RP Stril, A (reprint author), Ecole Normale Super, Dept Phys, 24 Rue Lhomond, F-75005 Paris, France.
EM arthur.stril@ens.fr
FU LPNHE and APC Paris [R32-2008-000-10130-0]; US Department of Energy
[DE-AC02-05CH11231]
FX AS thanks N. Mostek, N. Padmanabhan and D. Schlegel for various insights
about BigBOSS and JDEM and R. de Putter for valuable help on CMBEASY.
EVL thanks M. White and gratefully acknowledges support from World Class
University grant R32-2008-000-10130-0, a Chaire Blaise Pascal grant and
hospitality from LPNHE and APC Paris. This work has been supported in
part by the Director, Office of Science, Office of High Energy Physics,
of the US Department of Energy under Contract No. DE-AC02-05CH11231.
NR 37
TC 18
Z9 18
U1 0
U2 0
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
EI 1365-2966
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD MAY 1
PY 2010
VL 404
IS 1
BP 239
EP 246
DI 10.1111/j.1365-2966.2010.16193.x
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 584ZU
UT WOS:000276794600045
ER
PT J
AU Miller, AA
Silverman, JM
Butler, NR
Bloom, JS
Chornock, R
Filippenko, AV
Ganeshalingam, M
Klein, CR
Li, W
Nugent, PE
Smith, N
Steele, TN
AF Miller, A. A.
Silverman, J. M.
Butler, N. R.
Bloom, J. S.
Chornock, R.
Filippenko, A. V.
Ganeshalingam, M.
Klein, C. R.
Li, W.
Nugent, P. E.
Smith, N.
Steele, T. N.
TI SN 2008iy: an unusual Type IIn Supernova with an enduring 400-d rise
time
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE circumstellar matter; stars: mass-loss; supernovae: general; supernovae:
individual: SN 2008iy; supernovae: individual: SN 1988Z
ID MASSIVE STAR; ETA-CARINAE; SKY SURVEY; P-CYGNI; CIRCUMSTELLAR
INTERACTION; LUMINOUS SUPERNOVA; INFRARED-EMISSION; OPTICAL-SPECTRA;
DATA RELEASE; CLUMPY WIND
AB We present spectroscopic and photometric observations of the Type IIn supernova (SN) 2008iy. SN 2008iy showed an unprecedentedly long rise time of similar to 400 d, making it the first known SN to take significantly longer than 100 d to reach peak optical luminosity. The peak absolute magnitude of SN 2008iy was M-r approximate to -19.1 mag, and the total radiated energy over the first similar to 700 d was similar to 2 x 1050 erg. Spectroscopically, SN 2008iy is very similar to the Type IIn SN 1988Z at late times and, like SN 1988Z, it is a luminous X-ray source (both SNe had an X-ray luminosity L-X > 10(41) erg s(-1)). SN 2008iy has a growing near-infrared excess at late times similar to several other SNe IIn. The Ha emission-line profile of SN 2008iy shows a narrow P Cygni absorption component, implying a pre-SN wind speed of similar to 100 km s(-1). We argue that the luminosity of SN 2008iy is powered via the interaction of the SN ejecta with a dense, clumpy circumstellar medium. The similar to 400-d rise time can be understood if the number density of clumps increases with distance over a radius similar to 1.7 x 10(16) cm from the progenitor. This scenario is possible if the progenitor experienced an episodic phase of enhanced mass loss <1 century prior to explosion or if the progenitor wind speed increased during the decades before core collapse. We favour the former scenario, which is reminiscent of the eruptive mass-loss episodes observed for luminous blue variable (LBV) stars. The progenitor wind speed and increased mass-loss rates serve as further evidence that at least some, and perhaps all, Type IIn SNe experience LBV-like eruptions shortly before core collapse. We also discuss the host galaxy of SN 2008iy, a subluminous dwarf galaxy, and offer a few reasons why the recent suggestion that unusual, luminous SNe preferentially occur in dwarf galaxies may be the result of observational biases.
C1 [Miller, A. A.; Silverman, J. M.; Butler, N. R.; Bloom, J. S.; Chornock, R.; Filippenko, A. V.; Ganeshalingam, M.; Klein, C. R.; Li, W.; Smith, N.; Steele, T. N.] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA.
[Chornock, R.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Nugent, P. E.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Miller, AA (reprint author), Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA.
EM amiller@astro.berkeley.edu
NR 97
TC 27
Z9 28
U1 0
U2 1
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
EI 1365-2966
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD MAY 1
PY 2010
VL 404
IS 1
BP 305
EP 317
DI 10.1111/j.1365-2966.2010.16280.x
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 584ZU
UT WOS:000276794600052
ER
PT J
AU Gandolfi, S
Illarionov, AY
Fantoni, S
Miller, JC
Pederiva, F
Schmidt, KE
AF Gandolfi, S.
Illarionov, A. Yu.
Fantoni, S.
Miller, J. C.
Pederiva, F.
Schmidt, K. E.
TI Microscopic calculation of the equation of state of nuclear matter and
neutron star structure
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE equation of state; stars: neutron
ID CONSTRAINTS
AB We present results for neutron star models constructed with a new equation of state for nuclear matter at zero temperature. The ground state is computed using the auxiliary field diffusion Monte Carlo (AFDMC) technique, with nucleons interacting via a semiphenomenological Hamiltonian including a realistic two-body interaction. The effect of many-body forces is included by means of additional density-dependent terms in the Hamiltonian. In this Letter, we compare the properties of the resulting neutron star models with those obtained using other nuclear Hamiltonians, focusing on the relations between mass and radius, and between the gravitational mass and the baryon number.
C1 [Gandolfi, S.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Gandolfi, S.; Illarionov, A. Yu.; Fantoni, S.; Miller, J. C.] SISSA, Int Sch Adv Studies, I-34014 Trieste, Italy.
[Gandolfi, S.; Illarionov, A. Yu.; Fantoni, S.; Miller, J. C.] Ist Nazl Fis Nucl, Sez Trieste, Trieste, Italy.
[Illarionov, A. Yu.; Pederiva, F.] Univ Trent, Dipartimento Fis, I-38123 Povo, Trento, Italy.
[Fantoni, S.] INFM, DEMOCRITOS Natl Simulat Ctr, I-34014 Trieste, Italy.
[Miller, J. C.] Univ Oxford, Dept Phys Astrophys, Oxford OX1 3RH, England.
[Pederiva, F.] Ist Nazl Fis Nucl, Grp Collegato Trento, Trento, Italy.
[Schmidt, K. E.] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA.
RP Gandolfi, S (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM stefano@lanl.gov
OI Gandolfi, Stefano/0000-0002-0430-9035
FU European Science Foundation; NSF [PHY-0757703]
FX We thank S. Reddy, R. De Pietri and J. R. Stone for useful discussions.
This work was supported by CompStar, a Research Networking Programme of
the European Science Foundation; KES thanks SISSA for kind hospitality
and acknowledges support from NSF grant PHY-0757703. Calculations were
performed using the HPC facility 'BEN' at ECTstar in Trento,
under a grant for Supercomputing Projects, and using the HPC facility of
SISSA/Democritos in Trieste.
NR 28
TC 43
Z9 44
U1 0
U2 8
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD MAY 1
PY 2010
VL 404
IS 1
BP L35
EP L39
DI 10.1111/j.1745-3933.2010.00829.x
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 584ZU
UT WOS:000276794600008
ER
PT J
AU Mitra, A
Glendenning, NK
AF Mitra, Abhas
Glendenning, Norman K.
TI Likely formation of general relativistic radiation pressure supported
stars or 'eternally collapsing objects'
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE gravitation; stars: formation; stars: fundamental parameters
ID BLACK-HOLE CANDIDATES; INTRINSIC MAGNETIC-MOMENTS; GRAVITATIONAL
COLLAPSE; HORIZON; SPHERES
AB Hoyle & Fowler showed that there could be radiation pressure supported stars (RPSSs) even in Newtonian gravity. Much later, Mitra found that one could also conceive of their general relativistic (GR) version, 'relativistic radiation pressure supported stars' (RRPSSs). While RPSSs have z << 1, RRPSSs have z >> 1, where z is the surface gravitational redshift. Here, we elaborate on the formation of RRPSSs during continued gravitational collapse by recalling that a contracting massive star must start trapping radiation as it enters its photon sphere. It is found that, irrespective of the details of the contraction process, the trapped radiation flux should attain the corresponding Eddington value at sufficiently large z >> 1. This means that continued GR collapse may generate an intermediate RRPSS with z >> 1 before a true black hole state with z = infinity is formed asymptotically. An exciting consequence of this is that the stellar mass black hole candidates, at the present epoch, should be hot balls of quark-gluon plasma, as has been discussed by Royzen in a recent article entitled 'QCD against black holes?'.
C1 [Mitra, Abhas] Bhabha Atom Res Ctr, Theoret Astrophys Sect, Bombay 400085, Maharashtra, India.
[Glendenning, Norman K.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Inst Nucl & Particle Astrophys, Berkeley, CA 94720 USA.
RP Mitra, A (reprint author), Bhabha Atom Res Ctr, Theoret Astrophys Sect, Bombay 400085, Maharashtra, India.
EM amitra@barc.gov.in; NKGlendenning@lbl.gov
NR 41
TC 10
Z9 10
U1 1
U2 2
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD MAY 1
PY 2010
VL 404
IS 1
BP L50
EP L54
DI 10.1111/j.1745-3933.2010.00833.x
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 584ZU
UT WOS:000276794600011
ER
PT J
AU Diez-Silva, M
Dao, M
Han, JY
Lim, CT
Suresh, S
AF Diez-Silva, Monica
Dao, Ming
Han, Jongyoon
Lim, Chwee-Teck
Suresh, Subra
TI Shape and Biomechanical Characteristics of Human Red Blood Cells in
Health and Disease
SO MRS BULLETIN
LA English
DT Article
ID INTERCELLULAR-ADHESION MOLECULE-1; FALCIPARUM-INFECTED ERYTHROCYTES;
PLASMODIUM-FALCIPARUM; HEREDITARY SPHEROCYTOSIS; PARASITIZED
ERYTHROCYTES; MALARIA PATHOGENESIS; MICROFLUIDIC DEVICE;
ENDOTHELIAL-CELLS; LARGE-DEFORMATION; MEMBRANE
AB The biconcave shape and corresponding deformability of the human red blood cell (RBC) is an essential feature of its biological function. This feature of RBCs can be critically affected by genetic or acquired pathological conditions. In this review, we highlight new dynamic in vitro assays that explore various hereditary blood disorders and parasitic infectious diseases that cause disruption of RBC morphology and mechanics. In particular, recent advances in high-throughput microfluidic devices make it possible to sort/identify healthy and pathological human RBCs with different mechanobiological characteristics.
C1 [Diez-Silva, Monica] MIT, Res Grp Prof Subra Suresh, Cambridge, MA 02139 USA.
[Dao, Ming] MIT, Dept Mat Sci & Engn, Suresh Res Grp, Cambridge, MA 02139 USA.
[Han, Jongyoon] Sandia Natl Labs, Livermore, CA USA.
[Lim, Chwee-Teck] Natl Univ Singapore, Div Bioengn, Singapore 117576, Singapore.
RP Diez-Silva, M (reprint author), MIT, Res Grp Prof Subra Suresh, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
EM mdiez@mit.edu; mingdao@mit.edu; jyhan@mit.edu; ctlim@nus.edu.sg;
ssuresh@mit.edu
RI Dao, Ming/B-1602-2008; Lim, Chwee Teck/B-3307-2011
FU Interdisciplinary Research Groups on Infectious Diseases (ID) and
BioSystems and Micromechanics (BioSyM); Singapore-MIT Alliance for
Research and Technology (SMART); Singapore-MIT Alliance; Global
Enterprise for Micro-Mechanics and Molecular Medicine (GEM) Laboratory
at the National University of Singapore; National Institute of Health
[R01 HL094270-01A1, 1-R01-GM076689-01]; National University of Singapore
FX We acknowledge support from the Interdisciplinary Research Groups on
Infectious Diseases (ID) and BioSystems and Micromechanics (BioSyM),
which is funded by the Singapore-MIT Alliance for Research and
Technology (SMART), support from the Advanced Materials for Micro and
Nano Systems Programme and the Computational Systems Biology Programme
of the Singapore-MIT Alliance, and support from Global Enterprise for
Micro-Mechanics and Molecular Medicine (GEM) Laboratory at the National
University of Singapore. S.S. acknowledges support from the National
Institute of Health (Grants R01 HL094270-01A1 and 1-R01-GM076689-01) and
support from the National University of Singapore through Tan Chin Tuan
Centennial Overseas Chair professorship.
NR 62
TC 79
Z9 82
U1 3
U2 37
PU MATERIALS RESEARCH SOC
PI WARRENDALE
PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA
SN 0883-7694
J9 MRS BULL
JI MRS Bull.
PD MAY
PY 2010
VL 35
IS 5
BP 382
EP 388
DI 10.1557/mrs2010.571
PG 7
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 594JA
UT WOS:000277532300018
PM 21151848
ER
PT J
AU Sowa, MB
Chrisler, WB
Zens, KD
Ashjian, EJ
Opresko, LK
AF Sowa, Marianne B.
Chrisler, William B.
Zens, Kyra D.
Ashjian, Emily J.
Opresko, Lee K.
TI Three-dimensional culture conditions lead to decreased radiation induced
cytotoxicity in human mammary epithelial cells
SO MUTATION RESEARCH-FUNDAMENTAL AND MOLECULAR MECHANISMS OF MUTAGENESIS
LA English
DT Article
DE 3D culture; Radiation-induced cytotoxicity; Mammary epithelial cells;
Matrix regulation
ID BASEMENT-MEMBRANE CULTURES; MYOEPITHELIAL CELLS; IN-VITRO; APOPTOSIS;
TUMOR; GROWTH; MORPHOGENESIS; ARCHITECTURE; RESISTANCE; SPHEROIDS
AB For both targeted and non-targeted exposures, the cellular responses to ionizing radiation have predominantly been measured in two-dimensional monolayer cultures. Although convenient for biochemical analysis, the true interactions in vivo depend upon complex interactions between cells themselves and the surrounding extracellular matrix. This study directly compares the influence of culture conditions on radiation induced cytotoxicity following exposure to low-LET ionizing radiation. Using a three-dimensional (3D) human mammary epithelial tissue model, we have found a protective effect of 3D cell culture on cell survival after irradiation. The initial state of the cells (i.e., 2D versus 3D culture) at the time of irradiation does not alter survival, nor does the presence of extracellular matrix during and after exposure to dose, but long term culture in 3D which offers significant reduction in cytotoxicity at a given dose (e.g. similar to 4-fold increased survival at 5 Gy). The cell cycle delay induced following exposure to 2 and 5 Gy was almost identical between 2D and 3D culture conditions and cannot account for the observed differences in radiation responses. However the amount of apoptosis following radiation exposure is significantly decreased in 3D culture relative to the 20 monolayer after the same dose. A likely mechanism of the cytoprotective effect afforded by 3D culture conditions is the down regulation of radiation induced apoptosis in 3D structures. (C) 2010 Published by Elsevier B.V.
C1 [Sowa, Marianne B.; Chrisler, William B.; Opresko, Lee K.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Zens, Kyra D.] Univ Calif Berkeley, Sch Publ Hlth, Infect Dis & Vaccinol Dept, Berkeley, CA 94720 USA.
[Ashjian, Emily J.] Univ N Carolina, Sch Pharm, Chapel Hill, NC 27599 USA.
RP Sowa, MB (reprint author), Pacific NW Natl Lab, POB 999,MS J4-02, Richland, WA 99352 USA.
EM Marianne.sowa@pnl.gov
FU Office of Biological and Environmental Research, U.S. Department of
Energy [DE-AC06-76RLO-1830]
FX This work was supported by the Office of Biological and Environmental
Research, U.S. Department of Energy, Contract No. DE-AC06-76RLO-1830
(MBS and LKO).
NR 31
TC 18
Z9 20
U1 1
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0027-5107
J9 MUTAT RES-FUND MOL M
JI Mutat. Res.-Fundam. Mol. Mech. Mutagen.
PD MAY 1
PY 2010
VL 687
IS 1-2
SI SI
BP 78
EP 83
DI 10.1016/j.mrfmmm.2010.03.004
PG 6
WC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology
SC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology
GA 597JK
UT WOS:000277752900014
PM 20211636
ER
PT J
AU Yang, PD
Yan, RX
Fardy, M
AF Yang, Peidong
Yan, Ruoxue
Fardy, Melissa
TI Semiconductor Nanowire: What's Next?
SO NANO LETTERS
LA English
DT Article
DE Nanowire; photonics; energy conversion; bio-nano interface
ID SENSITIZED SOLAR-CELLS; III-V NANOWIRES; SILICON NANOWIRES;
OPTOELECTRONIC DEVICES; PHOSPHIDE NANOWIRES; EPITAXIAL-GROWTH;
WAVE-GUIDES; QUANTUM-DOT; NANOGENERATOR; ARRAYS
AB In this perspective, we take a critical look at the research progress within the nanowire community for the past decade. We discuss issues on the discovery of fundamentally new phenomena versus performance benchmarking for many of the nanowire applications. We also notice that both the bottom-up and top-down approaches have played important roles in advancing our fundamental understanding of this new class of nanostructures. Finally we attempt to look into the future and offer our personal opinions on what the future trends will be in nanowire research.
C1 [Yang, Peidong; Yan, Ruoxue; Fardy, Melissa] Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem, Div Mat Sci, Berkeley, CA 94720 USA.
RP Yang, PD (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem, Div Mat Sci, Berkeley, CA 94720 USA.
EM p_yang@berkeley.edu
FU Office of Basic Energy Sciences, Materials Sciences and Engineering
Division; U.S. Department of Energy [DE-AC02-05CH11231]; NIH; NSF
FX This work was supported by the Director, Office of Basic Energy
Sciences, Materials Sciences and Engineering Division, of the U.S.
Department of Energy under Contract No. DE-AC02-05CH11231. P.Y. would
like to thank NIH for supporting the nanowire cell endoscopy work and
NSF for the A.T. Waterman Award.
NR 63
TC 452
Z9 459
U1 32
U2 416
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD MAY
PY 2010
VL 10
IS 5
BP 1529
EP 1536
DI 10.1021/nl100665r
PG 8
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 593HX
UT WOS:000277444900001
PM 20394412
ER
PT J
AU Ismach, A
Druzgalski, C
Penwell, S
Schwartzberg, A
Zheng, M
Javey, A
Bokor, J
Zhang, YG
AF Ismach, Ariel
Druzgalski, Clara
Penwell, Samuel
Schwartzberg, Adam
Zheng, Maxwell
Javey, Ali
Bokor, Jeffrey
Zhang, Yuegang
TI Direct Chemical Vapor Deposition of Graphene on Dielectric Surfaces
SO NANO LETTERS
LA English
DT Article
DE Graphene; CVD; nanoelectronics
ID RAMAN-SPECTROSCOPY; LARGE-AREA; GRAPHITE; CARBON; FILMS; DISORDER;
SPECTRA; PHASE
AB Direct deposition of graphene on various dielectric substrates is demonstrated using a single-step chemical vapor deposition process. Single-layer graphene is formed through surface catalytic decomposition of hydrocarbon precursors on thin copper films precleposited on dielectric substrates. The copper films dewet and evaporate during or immediately after graphene growth, resulting in graphene deposition directly on the bare dielectric substrates. Scanning Raman mapping and spectroscopy, scanning electron microscopy, and atomic force microscopy confirm the presence of continuous graphene layers on tens of micrometer square metal-free areas. The revealed growth mechanism opens new opportunities for deposition of higher quality graphene films on dielectric materials.
C1 [Ismach, Ariel; Druzgalski, Clara; Penwell, Samuel; Schwartzberg, Adam; Zheng, Maxwell; Javey, Ali; Bokor, Jeffrey; Zhang, Yuegang] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Ismach, Ariel; Zheng, Maxwell; Javey, Ali; Bokor, Jeffrey] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA.
RP Zhang, YG (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM yzhang5@lbl.gov
RI Zhang, Y/E-6600-2011; ismach, ariel/A-9913-2015; Javey, Ali/B-4818-2013
OI Zhang, Y/0000-0003-0344-8399; ismach, ariel/0000-0002-4328-9591;
FU Office of Science, Office of Basic Energy Sciences, of the U.S.
Department of Energy [DE-AC02-05CH11231]; MSD Focus Center; Focus Center
Research Program; Semiconductor Research Corporation program
FX The authors thank Professor Mildred Dresselhaus and Professor Andrea
Ferrari for their helpful advice with the Raman spectroscopy
characterization, Drs. Shaul Aloni, Tevye Kuykendall, Jim Schuck,
Jeffery Urban, and Alex Weber-Bargioni for discussion and experimental
support. This work was supported by the Office of Science, Office of
Basic Energy Sciences, of the U.S. Department of Energy under contract
no. DE-AC02-05CH11231. A.I. and J.B. also acknowledge the support of the
MSD Focus Center, one of five research centers funded under the Focus
Center Research Program, a Semiconductor Research Corporation program.
NR 47
TC 243
Z9 251
U1 47
U2 322
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD MAY
PY 2010
VL 10
IS 5
BP 1542
EP 1548
DI 10.1021/nl9037714
PG 7
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 593HX
UT WOS:000277444900003
PM 20361753
ER
PT J
AU Li, QM
Wang, GT
AF Li, Qiming
Wang, George T.
TI Spatial Distribution of Defect Luminescence in GaN Nanowires
SO NANO LETTERS
LA English
DT Article
DE GaN; nanowire; cathodoluminescence; defects; yellow; III-nitride
ID ELECTRON-MOBILITY TRANSISTORS; GALLIUM NITRIDE NANOWIRES; YELLOW
LUMINESCENCE; CURRENT COLLAPSE; DEEP LEVELS; GROWN GAN; DOPED GAN;
PHOTOLUMINESCENCE; HETEROSTRUCTURES; PHOTOCONDUCTIVITY
AB The spatial distribution of defect-related and band-edge luminescence from GaN nanowires grown by metal organic chemical vapor deposition was studied by spatially resolved cathodoluminescence imaging and spectroscopy. A surface layer exhibiting strong yellow luminescence (YL) near 566 nm in the nanowires was revealed, compared to weak YL in the bulk. In contrast, other defect-related luminescence near 428 nm (blue luminescence) and 734 nm (red luminescence), in addition to band-edge luminescence (BEL) at 366 nm, were observed in the bulk of the nanowires but were largely absent at the surface. As the nanowire width approaches a critical dimension, the surface YL layer completely quenches the BEL. The surface YL is attributed to the diffusion and piling up of mobile point defects, likely isolated gallium vacancies, at the surface during growth.
C1 [Li, Qiming; Wang, George T.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Wang, GT (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM gtwang@sandia.gov
RI Wang, George/C-9401-2009
OI Wang, George/0000-0001-9007-0173
NR 36
TC 67
Z9 67
U1 5
U2 54
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
EI 1530-6992
J9 NANO LETT
JI Nano Lett.
PD MAY
PY 2010
VL 10
IS 5
BP 1554
EP 1558
DI 10.1021/nl903517t
PG 5
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 593HX
UT WOS:000277444900005
PM 20392110
ER
PT J
AU Fransson, J
Manoharan, HC
Balatsky, AV
AF Fransson, J.
Manoharan, H. C.
Balatsky, A. V.
TI Detection and Cloaking of Molecular Objects in Coherent Nanostructures
Using Inelastic Electron Tunneling Spectroscopy
SO NANO LETTERS
LA English
DT Article
DE IETS; quantum invisibility; quantum corral; STM; nanoscale engineering
ID QUANTUM MIRAGES
AB We address quantum invisibility in the context of electronics in nanoscale quantum structures. We make use of the freedom of design that quantum corrals provide and show that quantum mechanical objects can be hidden inside the corral, with respect to inelastic electron scattering spectroscopy in combination with scanning tunneling microscopy, and we propose a design strategy. A simple illustration of the invisibility is given in terms of an elliptic quantum corral containing a molecule, with a local vibrational mode, at one of the foci. Our work has implications to quantum information technology and presents new tools for nonlocal quantum detection and distinguishing between different molecules.
C1 [Fransson, J.] Uppsala Univ, Dept Phys & Astron, SE-75121 Uppsala, Sweden.
[Manoharan, H. C.] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
[Manoharan, H. C.] SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, Menlo Pk, CA 94025 USA.
[Balatsky, A. V.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Balatsky, A. V.] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA.
RP Fransson, J (reprint author), Uppsala Univ, Dept Phys & Astron, Box 534, SE-75121 Uppsala, Sweden.
EM jonas.fransson@fysik.uu.se
RI Fransson, Jonas/A-9238-2009
FU US DOE; LDRD; BES; NNSA of the US DOE at LANL [DE-AC52-06NA25396]; US
DOE at SLAC [DE-AC02-76SF00515]; NSF; Swedish Research Council (VR)
FX The authors thank I. Grigorenko for useful discussions. This work has
been supported by US DOE, LDRD, and BES and was carried out under the
auspices of the NNSA of the US DOE at LANL under Contract No.
DE-AC52-06NA25396 (J.F. and A.V.B), by the US DOE at SLAC under Contract
No. DE-AC02-76SF00515 (H.C.M.), and by the NSF (H.C.M). J.F. thanks
Swedish Research Council (VR) for support.
NR 16
TC 7
Z9 7
U1 0
U2 18
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD MAY
PY 2010
VL 10
IS 5
BP 1600
EP 1604
DI 10.1021/nl903991a
PG 5
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 593HX
UT WOS:000277444900013
PM 20402523
ER
PT J
AU Crouch, CH
Sauter, O
Wu, XH
Purcell, R
Querner, C
Drndic, M
Pelton, M
AF Crouch, Catherine H.
Sauter, Orion
Wu, Xiaohua
Purcell, Robert
Querner, Claudia
Drndic, Marija
Pelton, Matthew
TI Facts and Artifacts in the Blinking Statistics of Semiconductor
Nanocrystals
SO NANO LETTERS
LA English
DT Article
DE Semiconductor nanocrystals; blinking statistics; truncated power-law
distribution
ID EXCITATION-WAVELENGTH DEPENDENCE; COLLOIDAL QUANTUM DOTS; POWER-LAW
BEHAVIOR; FLUORESCENCE INTERMITTENCY; EMISSION; NANORODS; DIFFUSION;
EMITTERS; MEMORY; CORE
AB Since its initial discovery just over a decade ago, blinking of semiconductor nanocrystals has typically been described in terms of probability distributions for durations of bright, or "on," states and dark, or "off," states. These distributions are obtained by binning photon counts in order to construct a time series for emission intensity and then applying a threshold to distinguish on states from off states. By examining experimental data from CdSe/ZnS core/shell nanocrystals and by simulating this data according to a simple, two-state blinking model, we find that the apparent truncated power-law distributions of on times can depend significantly on the choices of binning time and threshold. For example, increasing the binning time by a factor of 10 can double the apparent truncation time and change the apparent power-law exponent by 30%, even though the binning time is only 3% of the truncation time. Our findings indicate that stringent experimental conditions are needed to accurately determine blinking-time probability distributions. Similar considerations should apply to any phenomenon characterized by time series data that displays telegraph noise.
C1 [Crouch, Catherine H.; Sauter, Orion; Purcell, Robert] Swarthmore Coll, Dept Phys & Astron, Swarthmore, PA 19081 USA.
[Wu, Xiaohua; Pelton, Matthew] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
[Querner, Claudia; Drndic, Marija] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA.
RP Crouch, CH (reprint author), Swarthmore Coll, Dept Phys & Astron, Swarthmore, PA 19081 USA.
EM ccrouch1@swarthmore.edu
RI Pelton, Matthew/H-7482-2013
OI Pelton, Matthew/0000-0002-6370-8765
FU HHMI; NSF [DMR-0449533, ONR YIP N000140410489]; U.S. Department of
Energy, Office of Science, Office of Basic Energy Sciences
[DE-AC02-06CH11357]
FX This work was supported by the HHMI grant to Swarthmore College for
undergraduate summer research; partial support at the University of
Pennsylvania was provided by the NSF Career Award DMR-0449533 and ONR
YIP N000140410489. Work at the Center for Nanoscale Materials was
supported by the U.S. Department of Energy, Office of Science, Office of
Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. We thank
Philip Everson and Eric Jensen for advice on statistical analysis, Pavel
Frantsuzov and colleagues for advice on the maximum likelihood method,
Jack Harris for bringing reference 24 to our attention, and Siying Wang
and Tali Dadosh For helpful feedback on the results and the manuscript.
Simulations made use of Matlab codes placed in the public domain by
Aaron Clauset (more details in Supporting Information).
NR 40
TC 65
Z9 65
U1 1
U2 24
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD MAY
PY 2010
VL 10
IS 5
BP 1692
EP 1698
DI 10.1021/nl100030e
PG 7
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 593HX
UT WOS:000277444900028
PM 20364845
ER
PT J
AU Weldon, JA
Aleman, B
Sussman, A
Gannett, W
Zettl, AK
AF Weldon, Jeffrey A.
Aleman, Benjamin
Sussman, Allen
Gannett, William
Zettl, Alex K.
TI Sustained Mechanical Self-Oscillations in Carbon Nanotubes
SO NANO LETTERS
LA English
DT Article
DE Carbon nanotubes; oscillators; self-oscillation; NEMS; field emission
ID SENSORS; SYSTEMS; DEVICE
AB The potential size and power benefits of resonant NEMS devices are frequently mitigated by the need for relatively large, high-frequency, high-power electronics. Here we demonstrate controllable, sustained self-oscillations in singly clamped carbon nanotubes operating with a single dc voltage supply, and we develop a model that predicts the required voltage on the basis of the material properties and device geometry. Using this model, we demonstrate for the first time top-down, self-oscillating NEMS devices suitable for large-scale integration.
C1 [Zettl, Alex K.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Ctr Integrated Nanomech Syst, Berkeley, CA 94720 USA.
Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Zettl, AK (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM azettl@berkeley.edu
RI Zettl, Alex/O-4925-2016
OI Zettl, Alex/0000-0001-6330-136X
FU Office of Energy Research, Office of Basic Energy Sciences, Materials
Sciences and Engineering Division, of the U.S. Department of Energy
[DE-AC02-05CH11231]; National Science Foundation within the Center of
Integrated Nano-mechanical Systems [EEC-0425914]; UC Berkeley
FX We thank C. Girit, K. Kim, W. Regan, and M. Schriver for useful
discussions and S. Onishi For technical assistance. This work was
supported in part by the Director, Office of Energy Research, Office of
Basic Energy Sciences, Materials Sciences and Engineering Division, of
the U.S. Department of Energy under contract no. DE-AC02-05CH11231,
which provided for detailed TEM characterization and device
microfabrication (W.G.), and by the National Science Foundation within
the Center of Integrated Nano-mechanical Systems under grant
EEC-0425914, which provided for the design, initial construction, and
modeling of the oscillator (JAW., B.A., and A.S.). B.A. acknowledges
support from the UC Berkeley Anselmo John Macchi Fellowship Fund in the
Physical Sciences. Author contributions: J.A.W. conceived of and
designed the experiments. J.A.W. and B.A. performed the experiments.
A.S. performed Finite-element simulations. B.A. developed the model.
J.A.W. and B.A. interpreted the model and simulation results. B.A.
conceived of and fabricated the top-down devices with assistance from
J.A.W. and W.G., JAW., B.A., and A.Z. cowrote the manuscript. A.Z.
served as project PI.
NR 26
TC 21
Z9 21
U1 0
U2 14
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD MAY
PY 2010
VL 10
IS 5
BP 1728
EP 1733
DI 10.1021/nl100148q
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 593HX
UT WOS:000277444900034
PM 20411990
ER
PT J
AU Huang, SCJ
Artyukhin, AB
Misra, N
Martinez, JA
Stroeve, PA
Grigoropoulos, CP
Ju, JWW
Noy, A
AF Huang, Shih-Chieh J.
Artyukhin, Alexander B.
Misra, Nipun
Martinez, Julio A.
Stroeve, Pieter A.
Grigoropoulos, Costas P.
Ju, Jiann-Wen W.
Noy, Aleksandr
TI Carbon Nanotube Transistor Controlled by a Biological Ion Pump Gate
SO NANO LETTERS
LA English
DT Article
DE Nanobioelectronics; carbon nanotube; lipid bilayer; membrane protein;
ion pump
ID SODIUM-POTASSIUM PUMP; CRYSTAL-STRUCTURE; ATPASE; NA; RECONSTITUTION;
NA,K-ATPASE; TRANSPORT; PROTEINS; VESICLES; BILAYERS
AB We report a hybrid bionanoelectronic transistor that has a local ATP-powered protein gate. ATP-dependent activity of a membrane ion pump, Na(+)/K(+)-ATPase, embedded in a lipid membrane covering the carbon nanotube, modulates the transistor output current by up to 40%. The ion pump gates the device by shifting the pH of the water layer between the lipid bilayer and nanotube surface. This transistor is a versatile bionanoelectronic platform that can incorporate other membrane proteins.
C1 [Huang, Shih-Chieh J.; Artyukhin, Alexander B.; Misra, Nipun; Martinez, Julio A.; Noy, Aleksandr] Lawrence Livermore Natl Lab, Mol Biophys & Funct Nanostruct Grp, Phys & Life Sci Directorate, Livermore, CA 94550 USA.
[Huang, Shih-Chieh J.; Ju, Jiann-Wen W.] Univ Calif Los Angeles, Dept Civil Engn, Los Angeles, CA 90024 USA.
[Artyukhin, Alexander B.; Martinez, Julio A.; Stroeve, Pieter A.] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
[Noy, Aleksandr] Univ Calif Merced, Sch Nat Sci, Merced, CA USA.
[Misra, Nipun; Grigoropoulos, Costas P.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
RP Noy, A (reprint author), Lawrence Livermore Natl Lab, Mol Biophys & Funct Nanostruct Grp, Phys & Life Sci Directorate, Livermore, CA 94550 USA.
EM anoy@ucmerced.edu
FU U.S. Department of Energy, Office of Basic Energy Sciences, Division of
Materials Sciences and Engineering; UC-LLNL Research Program; LLNL LSP
program
FX Research by A.N. was supported by the U.S. Department of Energy, Office
of Basic Energy Sciences, Division of Materials Sciences and
Engineering, and by the UC-LLNL Research Program. A.A., and J.M.
acknowledge support from the LLNL LSP program. A.N. acknowledges use of
The Molecular Foundry at LBNL. Parts of this work were performed under
the auspices of the U.S. Department of Energy by Lawrence Livermore
National Laboratory under Contract DE-AC52-07NA27344.
NR 29
TC 39
Z9 39
U1 5
U2 38
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD MAY
PY 2010
VL 10
IS 5
BP 1812
EP 1816
DI 10.1021/nl100499x
PG 5
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 593HX
UT WOS:000277444900048
PM 20426455
ER
PT J
AU Ko, DK
Urban, JJ
Murray, CB
AF Ko, Dong-Kyun
Urban, Jeffrey J.
Murray, Christopher B.
TI Carrier Distribution and Dynamics of Nanocrystal Solids Doped with
Artificial Atoms
SO NANO LETTERS
LA English
DT Article
DE Artificial atoms; nanocrystal solids; doping; carrier transport;
thermoelectricity; electrical conductivity
ID THERMOELECTRIC-POWER; QUANTUM DOTS; THIN-FILMS; TRANSISTORS; CONDUCTION;
AG2TE
AB Single component and multicomponent nanocrystal (NC) solids represent an exciting new form of condensed matter, as they can potentially capture not only the quantum Features of the individual building blocks but also novel collective properties through coupling of NC components. Unlike bulk semiconductors, however, there is no current theory for how introduction of dopants will impact the electronic structure and transport properties of NC solids. Empirically, it is known that in semiconductor NC systems, mixing two different materials of NCs electronically dopes the film. However, it has been challenging to connect the macroscopic measurements of doping effects on transport behavior to a microscopic understanding of how the identity, placement, and abundance of dopants impact these measurements. In this Letter, we report the first temperature-dependent thermopower measurements in doped and undoped NC solids. In combination with temperature-dependent electrical conductivity measurements, how the doping affects the carrier concentration as well as mobility is explored exclusively. These complementary measurements serve as a unique electronic spectroscopy tool to quantitatively reveal the energetics of carriers and electronic states in NC solids.
C1 [Ko, Dong-Kyun; Murray, Christopher B.] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA.
[Urban, Jeffrey J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA.
[Murray, Christopher B.] Univ Penn, Dept Chem, Philadelphia, PA 19104 USA.
RP Murray, CB (reprint author), Univ Penn, Dept Mat Sci & Engn, 3231 Walnut St, Philadelphia, PA 19104 USA.
EM cbmurray@sasupenn.edu
FU U.S. Department of Energy, Office of Basic Energy Sciences, Division of
Materials Sciences and Engineering [DE-SC0002158]; National Science
Foundation though PENN MRSEC [DMR-0520020]; Office of Science, Office of
Basic Energy Sciences, of the U.S. Department of Energy
[DE-AC02-05CH11231]
FX This work was supported in part by the U.S. Department of Energy, Office
of Basic Energy Sciences, Division of Materials Sciences and Engineering
under Award # DE-SC0002158 (C.B.M. and D.-K.K.) enabling the X-ray
scattering studies, structural characterization, and analysis of all
experimental results. Partial support was provided by the National
Science Foundation though PENN MRSEC DMR-0520020 enabling synthesis of
materials and travel to The Molecular Foundry, Lawrence Berkeley
National Laboratories, for processing and electronic testing Support for
J.J.U., and overall work performed at the Molecular Foundry was
supported by the Office of Science, Office of Basic Energy Sciences, of
the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
NR 29
TC 34
Z9 34
U1 3
U2 20
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD MAY
PY 2010
VL 10
IS 5
BP 1842
EP 1847
DI 10.1021/nl100571m
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 593HX
UT WOS:000277444900053
PM 20411991
ER
PT J
AU Chan, EM
Xu, CX
Mao, AW
Han, G
Owen, JS
Cohen, BE
Milliron, DJ
AF Chan, Emory M.
Xu, Chenxu
Mao, Alvin W.
Han, Gang
Owen, Jonathan S.
Cohen, Bruce E.
Milliron, Delia J.
TI Reproducible, High-Throughput Synthesis of Colloidal Nanocrystals for
Optimization in Multidimensional Parameter Space
SO NANO LETTERS
LA English
DT Article
DE Colloidal; synthesis; automation; optimization; high-throughput
ID CADMIUM-SELENIDE NANOCRYSTAL; UP-CONVERSION SPECTROSCOPY; CDSE
NANOCRYSTALS; QUANTUM DOTS; SEMICONDUCTOR NANOCRYSTALS; CDTE
NANOCRYSTALS; NANOPARTICLE FORMATION; CONTROLLED GROWTH; FLOW-REACTOR;
II-VI
AB While colloidal nanocrystals hold tremendous potential for both enhancing fundamental understanding of materials scaling and enabling advanced technologies, progress in both realms can be inhibited by the limited reproducibility of traditional synthetic methods and by the difficulty of optimizing syntheses over a large number of synthetic parameters. Here, we describe an automated platform for the reproducible synthesis of colloidal nanocrystals and for the high-throughput optimization of physical properties relevant to emerging applications of nanomaterials. This robotic platform enables precise control over reaction conditions while performing workflows analogous to those of traditional flask syntheses. We demonstrate control over the size, size distribution, kinetics, and concentration of reactions by synthesizing CdSe nanocrystals with 0.2% coefficient of variation in the mean diameters across an array of batch reactors and over multiple runs. Leveraging this precise control along with high-throughput optical and diffraction characterization, we effectively map multidimensional parameter space to tune the size and polydispersity of CdSe nanocrystals, to maximize the photoluminescence efficiency of CdTe nanocrystals, and to control the crystal phase and maximize the upconverted luminescence of lanthanide-doped NaYF(4) nanocrystals. On the basis of these demonstrative examples, we conclude that this automated synthesis approach will be of great utility for the development of diverse colloidal nanomaterials for electronic assemblies, luminescent biological labels, electroluminescent devices, and other emerging applications.
C1 [Chan, Emory M.; Xu, Chenxu; Mao, Alvin W.; Han, Gang; Cohen, Bruce E.; Milliron, Delia J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA.
[Owen, Jonathan S.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
RP Milliron, DJ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA.
EM DMilliron@lbl.gov
RI Milliron, Delia/D-6002-2012; han, gang/B-7274-2013;
OI han, gang/0000-0002-2300-5862; Owen, Jonathan/0000-0001-5502-3267
FU Office of Science, Office of Basic Energy Sciences, of the U.S.
Department of Energy [DE-AC02-05CH11231]
FX The authors thank M. Caldwell, D. Talapin, T. Mokari, and A. P.
Alivisatos for helpful discussions. We thank J. Fisher, R. Fisher, K.
Higashihara, R. Rosen, and Symyx Technologies for constructing WAN-DA.
C.X. and A.W.M. were supported by BLUR internships. This work was
carried out entirely at the Molecular Foundry and supported by the
Office of Science, Office of Basic Energy Sciences, of the U.S.
Department of Energy, under capital equipment funds and under Contract
No. DE-AC02-05CH11231.
NR 62
TC 80
Z9 81
U1 6
U2 72
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD MAY
PY 2010
VL 10
IS 5
BP 1874
EP 1885
DI 10.1021/nl100669s
PG 12
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 593HX
UT WOS:000277444900059
PM 20387807
ER
PT J
AU Kohout, SC
Bell, SC
Liu, LJ
Xu, Q
Minor, DL
Isacoff, EY
AF Kohout, Susy C.
Bell, Sarah C.
Liu, Lijun
Xu, Qiang
Minor, Daniel L., Jr.
Isacoff, Ehud Y.
TI Electrochemical coupling in the voltage-dependent phosphatase Ci-VSP
SO NATURE CHEMICAL BIOLOGY
LA English
DT Article
ID TUMOR-SUPPRESSOR PTEN; PHOSPHATIDYLINOSITOL 4,5-BISPHOSPHATE; SENSING
PHOSPHATASE; BINDING MOTIF; CHANNELS; PHOSPHOINOSITIDES; ACTIVATION;
MECHANISM; MEMBRANE; SENSORS
AB In the voltage-sensing phosphatase Ci-VSP, a voltage-sensing domain (VSD) controls a lipid phosphatase domain (PD). The mechanism by which the domains are allosterically coupled is not well understood. Using an in vivo assay, we found that the interdomain linker that connects the VSD to the PD is essential for coupling the full-length protein. Biochemical assays showed that the linker is also needed for activity in the isolated PD. We also identified a late step of VSD motion in the full-length protein that depends on the linker. Notably, we found that this VSD motion requires PI(4,5)P(2), a substrate of Ci-VSP. These results suggest that the voltage-driven motion of the VSD turns the enzyme on by rearranging the linker into an activated conformation, and that this activated conformation is stabilized by PI(4,5)P(2). We propose that Ci-VSP activity is self-limited because its decrease of PI(4,5)P(2) levels decouples the VSD from the enzyme.
C1 [Kohout, Susy C.; Isacoff, Ehud Y.] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
[Bell, Sarah C.; Isacoff, Ehud Y.] Univ Calif Berkeley, Chem Biol Grad Program, Berkeley, CA 94720 USA.
[Liu, Lijun; Xu, Qiang; Minor, Daniel L., Jr.] Univ Calif San Francisco, Cardiovasc Res Inst, San Francisco, CA 94143 USA.
[Minor, Daniel L., Jr.] Univ Calif San Francisco, Dept Biochem & Biophys, San Francisco, CA 94143 USA.
[Minor, Daniel L., Jr.] Univ Calif San Francisco, Dept Cell & Mol Pharmacol, San Francisco, CA 94143 USA.
[Minor, Daniel L., Jr.] Univ Calif San Francisco, Calif Inst Quantitat Biosci, San Francisco, CA 94143 USA.
[Minor, Daniel L., Jr.; Isacoff, Ehud Y.] Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA USA.
[Isacoff, Ehud Y.] Univ Calif Berkeley, Helen Wills Neurosci Inst, Berkeley, CA 94720 USA.
[Isacoff, Ehud Y.] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Isacoff, EY (reprint author), Univ Calif Berkeley, Dept Mol & Cell Biol, 229 Stanley Hall, Berkeley, CA 94720 USA.
EM ehud@berkeley.edu
FU US National Institutes of Health [R01NS035549, U24NS57631, R01DC007664]
FX This work was supported by grants R01NS035549 (E.Y.I.), U24NS57631
(E.Y.I.) and R01DC007664 (D. L. M.) from the US National Institutes of
Health and by an American Heart Association Established Investigator
Award ( D. L. M.). We thank Y. Okamura ( Japanese National Institute for
Physiological Sciences) for kindly providing the Ci-VSP cDNA, T. Meyer (
Stanford University) for kindly providing the LDR and CFInp cDNA, E.
Reuveny ( Weizmann Institute of Science) for providing the IRK1
construct, S. Nakanishi ( Osaka Bioscience Institute) for providing the
mGluR1 alpha receptor, J. Groves and P. Nair ( University of California,
Berkeley) for access to and instructions on use of the lipid - extruder,
and H. Janovjak, K. Nakajo, E. Peled and F. Tombola for helpful
discussions.
NR 32
TC 38
Z9 39
U1 0
U2 8
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 1552-4450
J9 NAT CHEM BIOL
JI Nat. Chem. Biol.
PD MAY
PY 2010
VL 6
IS 5
BP 369
EP 375
DI 10.1038/nchembio.349
PG 7
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 585KC
UT WOS:000276823200016
PM 20364128
ER
PT J
AU Nam, KT
Shelby, SA
Choi, PH
Marciel, AB
Chen, R
Tan, L
Chu, TK
Mesch, RA
Lee, BC
Connolly, MD
Kisielowski, C
Zuckermann, RN
AF Nam, Ki Tae
Shelby, Sarah A.
Choi, Philip H.
Marciel, Amanda B.
Chen, Ritchie
Tan, Li
Chu, Tammy K.
Mesch, Ryan A.
Lee, Byoung-Chul
Connolly, Michael D.
Kisielowski, Christian
Zuckermann, Ronald N.
TI Free-floating ultrathin two-dimensional crystals from sequence-specific
peptoid polymers
SO NATURE MATERIALS
LA English
DT Article
ID SINGLE-CRYSTALS; SECONDARY STRUCTURE; MAJOR DETERMINANT;
BLOCK-COPOLYMERS; FORM; PEPTIDES; POLYPEPTIDES; DISCOVERY; BEHAVIOR
AB The design and synthesis of protein-like polymers is a fundamental challenge in materials science. A biomimetic approach is to explore the impact of monomer sequence on non-natural polymer structure and function. We present the aqueous self-assembly of two peptoid polymers into extremely thin two-dimensional (2D) crystalline sheets directed by periodic amphiphilicity, electrostatic recognition and aromatic interactions. Peptoids are sequence-specific, oligo-N-substituted glycine polymers designed to mimic the structure and functionality of proteins. Mixing a 1: 1 ratio of two oppositely charged peptoid 36mers of a specific sequence in aqueous solution results in the formation of giant, free-floating sheets with only 2.7nm thickness. Direct visualization of aligned individual peptoid chains in the sheet structure was achieved using aberration-corrected transmission electron microscopy. Specific binding of a protein to ligand-functionalized sheets was also demonstrated. The synthetic flexibility and biocompatibility of peptoids provide a flexible and robust platform for integrating functionality into defined 2D nanostructures.
C1 [Kisielowski, Christian] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
[Nam, Ki Tae; Shelby, Sarah A.; Choi, Philip H.; Marciel, Amanda B.; Chen, Ritchie; Tan, Li; Chu, Tammy K.; Mesch, Ryan A.; Lee, Byoung-Chul; Connolly, Michael D.; Zuckermann, Ronald N.] Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA.
RP Zuckermann, RN (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA.
EM mzuckermann@lbl.gov
RI Nam, Ki Tae/A-1866-2011; Zuckermann, Ronald/A-7606-2014
OI Zuckermann, Ronald/0000-0002-3055-8860
FU Office of Science, Office of Basic Energy Sciences, of the US Department
of Energy [DE-AC02-05CH11231]; Defense Threat Reduction Agency
[IACRO-B0845281]
FX We thank P. Ashby, S. Whitelam and J. Schmit for helpful discussions and
S. Yakovlev and K. Downing for help with electron diffraction. We
acknowledge J. Holton and G. Meigs for all of their support at beamline
8.3.1 and E. Schaible and A. Hexemer for solution X-ray scattering
experiments at beamline 7.3.3 at the Advanced Light Source and Claire
Woo for grazing-incidence XRD data. This work was carried out at the
Molecular Foundry, the National Center for Electron Microscopy and the
Advanced Light Source at Lawrence Berkeley National Laboratory, all of
which are supported by the Office of Science, Office of Basic Energy
Sciences, of the US Department of Energy under Contract No.
DE-AC02-05CH11231. L. T. and P. H. C. were supported by the Defense
Threat Reduction Agency (IACRO-B0845281).
NR 42
TC 168
Z9 170
U1 14
U2 134
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1476-1122
J9 NAT MATER
JI Nat. Mater.
PD MAY
PY 2010
VL 9
IS 5
BP 454
EP 460
DI 10.1038/NMAT2742
PG 7
WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 586YZ
UT WOS:000276953500028
PM 20383129
ER
PT J
AU Laurence, TA
Chromy, BA
AF Laurence, Ted A.
Chromy, Brett A.
TI Efficient maximum likelihood estimator fitting of histograms
SO NATURE METHODS
LA English
DT Letter
ID REGRESSION-MODELS; QUASI-LIKELIHOOD
C1 [Laurence, Ted A.; Chromy, Brett A.] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA USA.
RP Laurence, TA (reprint author), Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA USA.
EM laurence2@llnl.gov
RI Laurence, Ted/E-4791-2011
OI Laurence, Ted/0000-0003-1474-779X
NR 6
TC 39
Z9 39
U1 2
U2 11
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1548-7091
J9 NAT METHODS
JI Nat. Methods
PD MAY
PY 2010
VL 7
IS 5
BP 338
EP 339
DI 10.1038/nmeth0510-338
PG 2
WC Biochemical Research Methods
SC Biochemistry & Molecular Biology
GA 589SY
UT WOS:000277175100005
PM 20431544
ER
PT J
AU Manz, BN
Groves, JT
AF Manz, Boryana N.
Groves, Jay T.
TI Spatial organization and signal transduction at intercellular junctions
SO NATURE REVIEWS MOLECULAR CELL BIOLOGY
LA English
DT Review
ID T-CELL-RECEPTOR; SUPPORTED PLANAR BILAYERS; IMMUNOLOGICAL SYNAPSE;
LIPID-BILAYERS; TCR-CD28 MICROCLUSTERS; MOLECULAR-ORGANIZATION; ADHESION
MOLECULES; ACTIN CYTOSKELETON; PATTERN-FORMATION; IMMUNE SYNAPSES
AB The coordinated organization of cell membrane receptors into diverse micrometre-scale spatial patterns is emerging as an important theme of intercellular signalling, as exemplified by immunological synapses. Key characteristics of these patterns are that they transcend direct protein-protein interactions, emerge transiently and modulate signal transduction. Such cooperativity over multiple length scales presents new and intriguing challenges for the study and ultimate understanding of cellular signalling. As a result, new experimental strategies have emerged to manipulate the spatial organization of molecules inside living cells. The resulting spatial mutations yield insights into the interweaving of the spatial, mechanical and chemical aspects of intercellular signalling.
C1 [Manz, Boryana N.; Groves, Jay T.] Univ Calif Berkeley, Howard Hughes Med Inst, Dept Chem, Berkeley, CA 94720 USA.
[Manz, Boryana N.; Groves, Jay T.] Univ Calif Berkeley, Lawrence Berkeley Lab, Biophys Grad Grp, Berkeley, CA 94720 USA.
[Groves, Jay T.] Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
[Groves, Jay T.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Manz, BN (reprint author), Univ Calif Berkeley, Howard Hughes Med Inst, Dept Chem, Berkeley, CA 94720 USA.
EM boryana@berkeley.edu; jtgroves@lbl.gov
FU Director, Office of Science, Office of Basic Energy Sciences, Chemical
Sciences, Geosciences and Biosciences Division of the U.S. Department of
Energy [DE-AC02-05CH11231]; National Science Foundation [MCB-0448614]
FX The hybrid live cell-supported membrane component of this work was
supported by the Director, Office of Science, Office of Basic Energy
Sciences, Chemical Sciences, Geosciences and Biosciences Division of the
U.S. Department of Energy under contract number DE-AC02-05CH11231.
General support for this project was also provided by a National Science
Foundation CAREER award MCB-0448614 to J.T.G.
NR 107
TC 60
Z9 60
U1 1
U2 26
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1471-0072
J9 NAT REV MOL CELL BIO
JI Nat. Rev. Mol. Cell Biol.
PD MAY
PY 2010
VL 11
IS 5
BP 342
EP 352
DI 10.1038/nrm2883
PG 11
WC Cell Biology
SC Cell Biology
GA 586YM
UT WOS:000276951900011
PM 20354536
ER
PT J
AU Reich, CW
Singh, B
AF Reich, C. W.
Singh, Balraj
TI Nuclear Data Sheets for A=163
SO NUCLEAR DATA SHEETS
LA English
DT Article
ID NEUTRON-DEFICIENT ISOTOPES; HIGH-SPIN STATES; RARE-EARTH NUCLEI;
K-QUANTUM NUMBER; ODD-A-NUCLEI; TRANSITION QUADRUPOLE-MOMENTS; TRIAXIAL
SUPERDEFORMED STATES; WOBBLING PHONON EXCITATIONS; PHOTONEUTRON
CROSS-SECTIONS; INCOMPLETE-FUSION REACTIONS
AB The available data from the various reaction and decay studies leading to nuclides having mass number A=163 have been reviewed. These data are summarized and presented, together with adopted level schemes and properties, for nuclides from Eu (Z=63) through Os (Z=76). Eu-163 represents a new addition to these nuclides. Level structures are now known for Ta-163 and W-163 through high spin studies and recoil decay tagging techniques. Several radioactive decays in this mass chain are not known at all or poorly established. No beta or gamma-ray data are available for Re-163-W-163-Ta-163-Hf-136 epsilon e decay chain. Those for Hf-163-Lu-163-Yb-163 epsilon decay chain and Eu-163-Gd-163-Tb-163 beta(-) decay chain are very sketchy. This evaluation is an update and revision of the previous one (2000Si01).
C1 [Reich, C. W.] Brookhaven Natl Lab, Natl Nucl Data Ctr, New York, NY 11973 USA.
McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada.
RP Reich, CW (reprint author), Brookhaven Natl Lab, Natl Nucl Data Ctr, New York, NY 11973 USA.
FU Office of Nuclear Physics, Office of Science, Department of Energy of
the United States; NSERC of Canada
FX This work was supported by the Office of Nuclear Physics, Office of
Science, Department of Energy of the United States. Work at McMaster was
also supported by the NSERC of Canada.
NR 369
TC 10
Z9 10
U1 1
U2 3
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0090-3752
EI 1095-9904
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD MAY
PY 2010
VL 111
IS 5
BP 1211
EP 1469
DI 10.1016/j.nds.2010.04.001
PG 259
WC Physics, Nuclear
SC Physics
GA 594JH
UT WOS:000277533100001
ER
PT J
AU Rodriguez, SB
El-Genk, MS
AF Rodriguez, Sal B.
El-Genk, Mohamed S.
TI Numerical investigation of potential elimination of 'hot streaking' and
stratification in the VHTR lower plenum using helicoid inserts
SO NUCLEAR ENGINEERING AND DESIGN
LA English
DT Article
ID LARGE-EDDY SIMULATION; HEAT-TRANSFER; IMPINGING JET; FLOW
AB The helium-cooled, high temperature Next Generation Nuclear Plant (NGNP) and Very High Temperature Reactor (VHTR) with prismatic type cores are being designed to operate at reactor exit temperatures ranging from 873 to 923K and 1123 to 1223K, respectively The helium flow velocity in the coolant channels of the core is similar to 70 m/s The high-temperature helium jets exiting the coolant channels impinge onto the bottom plate in the lower plenum (LP), causing "hot spots" ("hot streaking") and stratification due to the absence of proper mixing and the obstruction caused by the graphite support columns In order to minimize or eliminate hot streaking and enhance helium mixing in the LP, this work investigates using static, quadruple helicoid inserts at the exit of the coolant channels These inserts introduce radial and azimuthal momentum flow components, which result in extensive entrainment and mixing of the surrounding gas in the LP, significantly reducing the impingement onto the bottom plate, thereby minimizing hot streaking and stratification Results of parametric analyses and a comparison of the flow fields of helium free conventional and swirling jets, and of a convectional jet in cross flow are presented and discussed The analyses with helium at 1273 K and the dynamic Smagorinky turbulence model are conducted using Fuego, a 3D, finite element, incompressible, reactive flow, massively parallel code with state-of-the-art turbulence models developed at Sandia National Laboratories The calculations are benchmarked successfully by comparing the numerical results with experimental data and semi-empirical analytical expressions (C) 2010 Elsevier B V. All rights reserved.
C1 [Rodriguez, Sal B.; El-Genk, Mohamed S.] Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA.
[Rodriguez, Sal B.; El-Genk, Mohamed S.] Inst Space & Nucl Power Studies, Albuquerque, NM 87131 USA.
[Rodriguez, Sal B.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP El-Genk, MS (reprint author), Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA.
NR 32
TC 3
Z9 3
U1 0
U2 1
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0029-5493
J9 NUCL ENG DES
JI Nucl. Eng. Des.
PD MAY
PY 2010
VL 240
IS 5
BP 995
EP 1004
DI 10.1016/j.nucengdes.2009.12.036
PG 10
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 585AO
UT WOS:000276796900010
ER
PT J
AU Martineau, RC
Berry, RA
AF Martineau, Richard C.
Berry, Ray A.
TI A preliminary investigation of rapid depressurization phenomena
following a sudden DLOFC in a VHTR
SO NUCLEAR ENGINEERING AND DESIGN
LA English
DT Article
ID FEM
AB Air ingress has been identified as a potential threat for Very High Temperature gas-cooled Reactors (VHTR). Reactor components constructed of graphite will, at high temperatures, produce exothermic reactions in the presence of oxygen The danger lies in the possibility of fuel element damage and core structural failure. Previous investigations of air ingress mechanisms have focused on thermal and molecular diffusion, density-driven stratified flow due to hydrodynamic instability, and natural convection Not yet Investigated is the possibility of a rapid flow reversal of helium coolant due to a Taylor (rarefaction) wave expansion after a hypothetical sudden Depressurized Loss of Forced Cooling (DLOFC) scenario in a VHTR. Conceivably, flow reversal of the helium coolant could entrain significant quantities of air into the reactor vessel. Our goal here is to simply demonstrate this natural phenomena of compressible flow that could possibly result in rapid air ingress into a VHTR We start with a one-dimensional shock tube simulation to simply illustrate the development of a Taylor wave. The simulation is carried out far enough in time to allow the resulting reentrant flow to occur Then, a simulation is performed of an idealized two-dimensional axisymmetric representation of the lower plenum of General Atomics GT-MHR subjected to a hypothetical catastrophic break of the hot duct Results show the potential for significant and rapid air ingress into the reactor vessel in the case of a large break in the cooling system (C) 2010 Elsevier B.V. All rights reserved
C1 [Martineau, Richard C.; Berry, Ray A.] Idaho Natl Lab, Nucl Fuels & Mat Div, Idaho Falls, ID 83415 USA.
RP Martineau, RC (reprint author), Idaho Natl Lab, Nucl Fuels & Mat Div, POB 1625, Idaho Falls, ID 83415 USA.
FU US Government [DE-AC07-051D14517]
FX The submitted manuscript has been authored by a contractor of the US
Government under Contract No. DE-AC07-051D14517 (INL/CON-08-15003).
Accordingly, the U.S. Government retains a non-exclusive, royalty-free
license to publish or reproduce the published form of this contribution,
or allow others to do so, for U.S. Government purposes.
NR 17
TC 2
Z9 2
U1 0
U2 1
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0029-5493
J9 NUCL ENG DES
JI Nucl. Eng. Des.
PD MAY
PY 2010
VL 240
IS 5
BP 1013
EP 1021
DI 10.1016/j.nucengdes.2010.01.023
PG 9
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 585AO
UT WOS:000276796900012
ER
PT J
AU Chandler, D
Primm, RT
Maldonado, GI
AF Chandler, David
Primm, R. T., III
Maldonado, G. Ivan
TI Validation of a Monte Carlo based depletion methodology via High Flux
Isotope Reactor HEU post-irradiation examination measurements
SO NUCLEAR ENGINEERING AND DESIGN
LA English
DT Article
AB The purpose of this study is to validate a Monte Carlo based depletion methodology by comparing calculated post-irradiation uranium isotopic compositions in the fuel elements of the High Flux Isotope Reactor (HFIR) core to values measured using uranium mass-spectrographic analysis Three fuel plates were analyzed two from the outer fuel element (OH) and one from the inner fuel element (IFE). Fuel plates O-111-8, O-350-1, and I-417-24 from outer fuel elements 5-O and 21-O and inner fuel element 49-I, respectively, were selected for examination. Fuel elements 5-O, 21-O, and 49-I were loaded into HFIR during cycles 4, 16, and 35, respectively (mid to late 1960s). Approximately one year after each of these elements were irradiated, they were transferred to the High Radiation Level Examination Laboratory (HRLEL) where samples from these fuel plates were sectioned and examined via uranium mass-spectrographic analysis The isotopic composition of each of the samples was used to determine the atomic percent of the uranium isotopes
A Monte Carlo based depletion computer program. ALEPH, which couples the MCNP and ORIGEN codes, was utilized to calculate the nuclide inventory at the end-of-cycle (EOC) A current ALEPH/MCNP input for HFIR fuel cycle 400 was modified to replicate cycles 4,16, and 35 The control element withdrawal curves and flux trap loadings were revised, as well as the radial zone boundaries and nuclide concentrations in the MCNP model The calculated EOC uranium isotopic compositions for the analyzed plates were found to be in good agreement with measurements, which reveals that ALEPH/MCNP can accurately calculate burn-up dependent uranium isotopic concentrations for the HFIR core.
The spatial power distribution in HFIR changes significantly as irradiation time increases due to control element movement Accurate calculation of the end-of-life uranium isotopic inventory is a good indicator that the powerdistnbution variation as a function of space and time is accurately calculated, i e an integral check Hence, the time dependent heat generation source terms needed for reactor core thermal hydraulic analysis, if dei wed from this methodology, have been shown to be accurate for highly enriched uranium (HEU) fuel (C) 2010 Elsevier B V. All rights reserved.
C1 [Chandler, David; Maldonado, G. Ivan] Univ Tennessee, Dept Nucl Engn, Knoxville, TN 37996 USA.
[Primm, R. T., III] Oak Ridge Natl Lab, Res Reactors Div, Oak Ridge, TN 37831 USA.
RP Maldonado, GI (reprint author), Univ Tennessee, Dept Nucl Engn, 311 Pasqua Engn, Knoxville, TN 37996 USA.
OI Maldonado, Guillermo/0000-0001-7377-4494
NR 17
TC 1
Z9 1
U1 0
U2 2
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0029-5493
J9 NUCL ENG DES
JI Nucl. Eng. Des.
PD MAY
PY 2010
VL 240
IS 5
BP 1033
EP 1042
DI 10.1016/j.nucengdes.2010.01.007
PG 10
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 585AO
UT WOS:000276796900015
ER
PT J
AU Zakharov, LE
AF Zakharov, Leonid E.
TI Reply to comment on 'Plasma current spikes due to internal reconnection
during tokamak disruptions'
SO NUCLEAR FUSION
LA English
DT Editorial Material
C1 Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Zakharov, LE (reprint author), Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
NR 0
TC 2
Z9 2
U1 1
U2 4
PU INT ATOMIC ENERGY AGENCY
PI VIENNA
PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA
SN 0029-5515
J9 NUCL FUSION
JI Nucl. Fusion
PD MAY
PY 2010
VL 50
IS 5
SI SI
AR 058002
DI 10.1088/0029-5515/50/5/058002
PG 1
WC Physics, Fluids & Plasmas
SC Physics
GA 586LJ
UT WOS:000276910100013
ER
PT J
AU Jahedi, N
Conley, R
Shi, B
Qian, J
Lauer, K
Macrander, A
AF Jahedi, N.
Conley, R.
Shi, B.
Qian, J.
Lauer, K.
Macrander, A.
TI Metrology of multilayer Laue lens structures by means of scanning
electron microscope imaging
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT International Workshop on X-Ray Mirror Design, Fabrication and Metrology
CY SEP 22-24, 2009
CL Osaka Univ, Osaka, JAPAN
SP SPring 8
HO Osaka Univ
DE Metrology; X-ray; Focusing; Multilayer; Lens; SEM
ID HARD X-RAYS; ZONE PLATES
AB Scanning electron microscope images obtained on a cross-section of a sputtered multilayer structure have proven to be crucial for qualifying these films for their intended use as a multilayer Laue lens. The quality of the linear Fresnel zone structure is assessed by means of image processing and analyses, and these analyses are then used to qualify the structure for further lens processing. The image analysis as well as problematic SEM artifacts are discussed. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Jahedi, N.; Conley, R.; Shi, B.; Qian, J.; Macrander, A.] Argonne Natl Lab, Adv Photon Source, Xray Sci Div, Argonne, IL 60439 USA.
[Conley, R.; Lauer, K.] Brookhaven Natl Lab, Natl Sycnhrotron Light Source 2, Expt Facil Div, Upton, NY 11973 USA.
RP Macrander, A (reprint author), Argonne Natl Lab, Adv Photon Source, Xray Sci Div, Argonne, IL 60439 USA.
EM macrander@aps.anl.gov
RI Conley, Ray/C-2622-2013
NR 24
TC 7
Z9 7
U1 1
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD MAY 1
PY 2010
VL 616
IS 2-3
BP 89
EP 92
DI 10.1016/j.nima.2009.11.015
PG 4
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 598YP
UT WOS:000277876400002
ER
PT J
AU Geckeler, RD
Just, A
Krause, M
Yashchuk, VV
AF Geckeler, Ralf D.
Just, Andreas
Krause, Michael
Yashchuk, Valeriy V.
TI Autocollimators for deflectometry: Current status and future progress
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT International Workshop on X-Ray Mirror Design, Fabrication and Metrology
CY SEP 22-24, 2009
CL Osaka Univ, Osaka, JAPAN
SP SPring 8
HO Osaka Univ
DE Autocollimator; Angle; Angle calibration; Topography measurement;
Precision metrology; Traceability
ID CHARGE-COUPLED-DEVICE; RESOLUTION ELECTRONIC AUTOCOLLIMATORS; NM
TOPOGRAPHY MEASUREMENT; ULTRA-PRECISE MEASUREMENT; ANGLE COMPARATOR;
CALIBRATION; ACCURACY; BESSY
AB The proliferation of autocollimator-based surface profilometers at synchrotron metrology laboratories worldwide necessitates a detailed understanding of the parameters influencing their angular response. A comprehensive overview of the current status of autocollimator characterization and calibration at the Physikalisch-Technische Bundesanstalt (PTB) and its implications for their optimal application are provided. Present and future challenges to angle metrology posed by autocollimator-based surface profilometers will be delineated, and solutions and expected progress to meet them will be outlined. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Geckeler, Ralf D.; Just, Andreas; Krause, Michael] PTB, D-38116 Braunschweig, Germany.
[Yashchuk, Valeriy V.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Geckeler, RD (reprint author), PTB, Bundesallee 100, D-38116 Braunschweig, Germany.
EM ralf.geckeler@ptb.de
NR 40
TC 36
Z9 36
U1 1
U2 9
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD MAY 1
PY 2010
VL 616
IS 2-3
BP 140
EP 146
DI 10.1016/j.nima.2009.11.021
PG 7
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 598YP
UT WOS:000277876400011
ER
PT J
AU Barber, SK
Anderson, ED
Cambie, R
McKinney, WR
Takacs, PZ
Stover, JC
Voronov, DL
Yashchuk, VV
AF Barber, Samuel K.
Anderson, Erik D.
Cambie, Rossana
McKinney, Wayne R.
Takacs, Peter Z.
Stover, John C.
Voronov, Dmitriy L.
Yashchuk, Valeriy V.
TI Binary pseudo-random gratings and arrays for calibration of modulation
transfer functions of surface profilometers
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT International Workshop on X-Ray Mirror Design, Fabrication and Metrology
CY SEP 22-24, 2009
CL Osaka Univ, Osaka, JAPAN
SP SPring 8
HO Osaka Univ
DE Modulation transfer function; MTF; Power spectral density; PSD; Spatial
resolution; Surface metrology; Surface profilometer; Interferometric
microscope
ID CROSS-CORRELATION CHOPPER; UNIFORMLY REDUNDANT ARRAYS; OF-FLIGHT
SPECTROMETER; X-RAY; OPTICS; INTERFEROMETRY; ROUGHNESS; STANDARD
AB A technique for precise measurement of the modulation transfer function (MTF), suitable for characterization of a broad class of surface profilometers, is investigated in detail. The technique suggested in papers Yashchuk et al. (2007) [26], Yashchuk et al. (2008) [25] is based on use of binary pseudo-random (BPR) gratings and arrays as standard MTF test surfaces. Unlike most conventional test surfaces. BPR gratings and arrays possess white-noise-like inherent power spectral densities (PSD), allowing the direct determination of the one- and two-dimensional MTF, respectively, with a sensitivity uniform over the entire spatial frequency range of a profiler. In the cited work, a one-dimensional realization of the suggested method based on use of BPR gratings has been demonstrated. Here, a high performance of the MTF calibration technique is demonstrated via cross comparison measurements of a number of two-dimensional BPR arrays using two different interferometric microscopes and a scatterometer. We also present the results of application of the experimentally determined MTF correction to the measurement taken with the Micromap (TM)-570 interferometric microscope of the surface roughness of a super-polished test mirror. In this particular case, without accounting for the instrumental MTF, the surface rms roughness over half of the instrumental spatial frequency bandwidth would be underestimated by a factor of approximately 1.4. Published by Elsevier B.V.
C1 [Barber, Samuel K.; Anderson, Erik D.; Cambie, Rossana; McKinney, Wayne R.; Voronov, Dmitriy L.; Yashchuk, Valeriy V.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Takacs, Peter Z.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Stover, John C.] Scatter Works Inc, Tucson, AZ 85712 USA.
RP Yashchuk, VV (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM vvyashchuk@lbl.gov
RI McKinney, Wayne/F-2027-2014
OI McKinney, Wayne/0000-0003-2586-3139
NR 53
TC 12
Z9 12
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD MAY 1
PY 2010
VL 616
IS 2-3
BP 172
EP 182
DI 10.1016/j.nima.2009.11.046
PG 11
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 598YP
UT WOS:000277876400015
ER
PT J
AU Yashchuk, VV
Barber, S
Domning, EE
Kirschman, JL
Morrison, GY
Smith, BV
Siewert, F
Zeschke, T
Geckeler, R
Just, A
AF Yashchuk, Valeriy V.
Barber, Samuel
Domning, Edward E.
Kirschman, Jonathan L.
Morrison, Gregory Y.
Smith, Brian V.
Siewert, Frank
Zeschke, Thomas
Geckeler, Ralf
Just, Andreas
TI Sub-microradian surface slope metrology with the ALS Developmental Long
Trace Profiler
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT International Workshop on X-Ray Mirror Design, Fabrication and Metrology
CY SEP 22-24, 2009
CL Osaka Univ, Osaka, JAPAN
SP SPring 8
HO Osaka Univ
DE X-ray optics; Surface metrology; Surface slope measurement; Long trace
profiler; Surface profilometer; Autocollimator; Pentaprism
ID ANGLE COMPARATOR; CALIBRATION; TOPOGRAPHY; OPTICS; AUTOCOLLIMATORS;
ENCODERS
AB A new low-budget slope measuring instrument, the Developmental Long Trace Profiler (DLTP), was recently brought to operation at the ALS Optical Metrology Laboratory. The design, instrumental control and data acquisition system, initial alignment and calibration procedures, as well as the developed experimental precautions and procedures are also described in detail. The capability of the DLTP to achieve sub-microradian surface slope metrology is verified via cross-comparison measurements with other high-performance slope measuring instruments when measuring the same high-quality test optics. The directions of future work to develop a surface slope measuring profiler with nano-radian performance are also discussed. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Yashchuk, Valeriy V.; Barber, Samuel; Domning, Edward E.; Kirschman, Jonathan L.; Morrison, Gregory Y.; Smith, Brian V.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Siewert, Frank; Zeschke, Thomas] Helmholtz Zentrum Berlin Mat & Energie, Elektronenspeicherring BESSY 2, D-12489 Berlin, Germany.
[Geckeler, Ralf; Just, Andreas] Phys Tech Bundesanstalt, D-38116 Braunschweig, Germany.
RP Yashchuk, VV (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM vvyashchuk@lbl.gov
NR 38
TC 63
Z9 64
U1 1
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD MAY 1
PY 2010
VL 616
IS 2-3
BP 212
EP 223
DI 10.1016/j.nima.2009.10.175
PG 12
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 598YP
UT WOS:000277876400022
ER
PT J
AU Xiang, X
Chen, M
Ju, YF
Zu, XT
Wang, LM
Zhang, Y
AF Xiang, X.
Chen, M.
Ju, Y. F.
Zu, X. T.
Wang, L. M.
Zhang, Y.
TI N-TiO2 nanoparticles embedded in silica prepared by Ti ion implantation
and annealing in nitrogen
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
INTERACTIONS WITH MATERIALS AND ATOMS
LA English
DT Article
DE N-doped TiO2; Ion implantation; Annealing; Optical absorption
ID VISIBLE-LIGHT ACTIVITY; PHOTOCATALYTIC ACTIVITY; DOPED TIO2; THIN-FILMS;
INSULATORS; TITANIA; ENERGY
AB Room-temperature Ti ion implantation and subsequent thermal annealing in N-2 ambience have been used to fabricate the anatase and rutile structured N-doped TiO2 particles embedded in the surface region of fused silica. The Stopping and Range of Ions in Matter (SRIM) code simulation indicates a Gaussian distribution of implanted Ti, peaked at similar to 75 nm with a full width at half maximum of similar to 80 nm. However, the transmission electron microscopy image shows a much shallower distribution to depth of similar to 70 nm. Significant sputtering loss of silica substrates has occurred during implantation. Nanoparticles with size of 10-20 nm in diameter have formed after implantation. X-ray photoelectron spectroscopy indicates the coexistence of TiO2 and metallic Ti in the as-implanted samples. Metallic Ti is oxidized to anatase TiO2 after annealing at 600 degrees C, while rutile TiO2 forms by phase transformation after annealing at 900 degrees C. At the same time, N-Ti-O, Ti-O-N and/or Ti-N-O linkages have formed in the lattice of TiO2. A red shift of 0.34 eV in the absorption edge is obtained for N-doped anatase TiO2 after annealing at 600 degrees C for 6 h. The absorbance increases in the ultraviolet and visible waveband. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Xiang, X.; Chen, M.; Ju, Y. F.; Zu, X. T.] Univ Elect Sci & Technol China, Dept Appl Phys, Chengdu 610054, Peoples R China.
[Wang, L. M.] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA.
[Zhang, Y.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Xiang, X (reprint author), Univ Elect Sci & Technol China, Dept Appl Phys, Chengdu 610054, Peoples R China.
EM xiaxiang@uestc.edu.cn
RI 向, 霞/F-3107-2012
FU Foundation for Young Scholars of University of Electronic Science and
Technology of China [L08010401JX0806]; Division of Materials Science and
Engineering, Office of Basic Energy Sciences, US Department of Energy;
US Department of Energy [DE-AC05-76RL01830]
FX This study was supported financially by the Foundation for Young
Scholars of University of Electronic Science and Technology of China
(Grant No. L08010401JX0806). A portion of the research was performed
using EMSL, a national scientific user facility sponsored by the
Department of Energy's Office of Biological and Environmental Research
located at PNNL. X.X. is grateful for the operational support for the
EMSL accelerator. Y.Z. was supported by the Division of Materials
Science and Engineering, Office of Basic Energy Sciences, US Department
of Energy. PNNL is operated by Battelle for the US Department of Energy
under Contract No. DE-AC05-76RL01830. TEM measurements were conducted in
the Electron Microbeam Analysis Laboratory (EMAL) of the University of
Michigan.
NR 26
TC 5
Z9 5
U1 3
U2 20
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-583X
J9 NUCL INSTRUM METH B
JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms
PD MAY 1
PY 2010
VL 268
IS 9
BP 1440
EP 1445
DI 10.1016/j.nimb.2010.01.023
PG 6
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Atomic, Molecular & Chemical; Physics, Nuclear
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 596IV
UT WOS:000277679300013
ER
PT J
AU Dusling, K
Gelis, F
Lappi, T
Venugopalan, R
AF Dusling, Kevin
Gelis, Francois
Lappi, Tuomas
Venugopalan, Raju
TI Long range two-particle rapidity correlations in A plus A collisions
from high energy QCD evolution
SO NUCLEAR PHYSICS A
LA English
DT Article
ID COLOR GLASS CONDENSATE; HEAVY-ION COLLISIONS; GLUON
DISTRIBUTION-FUNCTIONS; NUCLEUS-NUCLEUS COLLISIONS; STRUCTURE FUNCTION
RATIOS; STRONG EXTERNAL SOURCES; QUARK PAIR PRODUCTION; SMALL-X;
PERTURBATIVE QCD; RENORMALIZATION-GROUP
AB Long range rapidity correlations in A + A collisions are sensitive to strong color field dynamics at early times after the collision. These can be computed in a factorization formalism (Gelis, Lappi and Venugopalan (2009) [I]) which expresses the n-gluon inclusive spectrum at arbitrary rapidity separations in terms of the multi-parton correlations in the nuclear wavefunctions. This formalism includes all radiative and rescattering contributions, to leading accuracy in alpha(s)Delta Y, where Delta Y is the rapidity separation between either one of the measured gluons and a projectile, or between the measured gluons themselves. In this paper, we use a mean field approximation for the evolution of the nuclear wavefunctions to obtain a compact result for inclusive two gluon correlations in terms of the unintegrated gluon distributions in the nuclear projectiles. The unintegrated gluon distributions satisfy the Balitsky-Kovchegov equation, which we solve with running coupling and with initial conditions constrained by existing data on electron-nucleus collisions. Our results are valid for arbitrary rapidity separations between measured gluons having transverse momenta p(perpendicular to) . q(perpendicular to) greater than or similar to Q(s) where Q(s) is the saturation scale in the nuclear wavefunctions. We compare our results to data on long range rapidity correlations observed in the near-side ridge at RHIC and make predictions for similar long range rapidity correlations at the LHC. Published by Elsevier B.V.
C1 [Dusling, Kevin; Venugopalan, Raju] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[Gelis, Francois] CEA DSM Saclay, CNRS, Inst Phys Theor, URA 2306, F-91191 Gif Sur Yvette, France.
[Lappi, Tuomas] Univ Jyvaskyla, Dept Phys, Jyvaskyla 40014, Finland.
[Lappi, Tuomas] Univ Helsinki, Helsinki Inst Phys, FIN-00014 Helsinki, Finland.
RP Dusling, K (reprint author), Brookhaven Natl Lab, Dept Phys, Bldg 510A, Upton, NY 11973 USA.
EM kdusling@quark.phy.bnl.gov; francois.gelis@cea.fr; tuomas.lappi@jyu.fi;
rajuv@mac.com
OI Dusling, Kevin/0000-0001-9598-0416
FU US Department of Energy [DE-AC02-98CH10886]; Academy of Finland
[126604]; Agence Nationale de la Recherche [ANR-06-BLAN-0285-01]
FX We thank Javier Albacete, Adrian Dumitru, Anna Stasto and Kirill Tuchin
for very useful discussions. We are especially grateful to Gregory Soyez
for his coordinate space BK code. K.D. and R.V.'s research is supported
by the US Department of Energy under DOE Contract No. DE-AC02-98CH10886.
T.L. is supported by the Academy of Finland, project 126604. F.G. is
supported in part by Agence Nationale de la Recherche via the program
ANR-06-BLAN-0285-01.
NR 72
TC 106
Z9 106
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD MAY 1
PY 2010
VL 836
IS 1-2
BP 159
EP 182
DI 10.1016/j.nuclphysa.2009.12.044
PG 24
WC Physics, Nuclear
SC Physics
GA 585AI
UT WOS:000276796300010
ER
PT J
AU Cirigliano, V
Jenkins, JP
Gonzalez-Alonso, M
AF Cirigliano, Vincenzo
Jenkins, James P.
Gonzalez-Alonso, Martin
TI Semileptonic decays of light quarks beyond the Standard Model
SO NUCLEAR PHYSICS B
LA English
DT Article
DE Semileptonic decays; CKM unitarity; Effective theory; Beyond the
Standard Model
ID NEUTRINO-NUCLEON-SCATTERING; ELECTROWEAK PARAMETERS;
RADIATIVE-CORRECTIONS; BETA-DECAY; PARITY NONCONSERVATION;
PRECISION-MEASUREMENT; PAIR PRODUCTION; VIOLATION; UNIVERSALITY;
UNITARITY
AB We describe non-standard contributions to semileptonic processes in a model independent way in terms of in SU(2)(L) x U(1)(Y) invariant effective lagrangian at the weak scale, front which we derive the low-energy effective lagrangian governing muon and beta decays. We find that the deviation from Cabibbo universality, Delta(CKM) equivalent to vertical bar V-ud vertical bar(2) + vertical bar V-us vertical bar(2) + vertical bar V-ub vertical bar(2) - 1, receives contributions from four effective operators. The phenomenological bound Delta(CKM) = (-1 +/- 6) x 10(-4) provides strong constraints on all four operators, corresponding to art effective scale Lambda > 11 TeV (90% CL). Depending on the operator, this constraint is at the same level or better then the Z pole observables. Conversely, precision electroweak constraints alone would allow universality violations as large as Delta(CKM) = -0.01 (90% CL). An observed Delta(CKM) not equal 0 at this level Could be explained in terms of a single four-fermion operator which is relatively poorly constrained by electroweak precision measurements. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Cirigliano, Vincenzo; Jenkins, James P.; Gonzalez-Alonso, Martin] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Gonzalez-Alonso, Martin] Univ Valencia, CSIC, Dept Fis Teor, E-46071 Valencia, Spain.
[Gonzalez-Alonso, Martin] Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain.
RP Cirigliano, V (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM cirigliano@lanl.gov; jjenkins6@lanl.gov; martin.gonzalez@ific.uv.es
RI Gonzalez-Alonso, Martin/O-1480-2016;
OI Gonzalez-Alonso, Martin/0000-0003-0319-8828; Cirigliano,
Vincenzo/0000-0002-9056-754X
NR 64
TC 50
Z9 50
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0550-3213
J9 NUCL PHYS B
JI Nucl. Phys. B
PD MAY 1
PY 2010
VL 830
IS 1-2
BP 95
EP 115
DI 10.1016/j.nuclphysb.2009.12.020
PG 21
WC Physics, Particles & Fields
SC Physics
GA 563RB
UT WOS:000275150000003
ER
PT J
AU Chuang, WY
Gao, P
AF Chuang, Wu-yen
Gao, Peng
TI Flux-induced isometry gauging in heterotic strings
SO NUCLEAR PHYSICS B
LA English
DT Article
ID BACKGROUND FLUXES; COMPACTIFICATIONS; MANIFOLDS; VACUA
AB We study the effect of flux-induced isometry gauging of the scalar manifold in N = 2 heterotic string compactification with gauge fluxes. We show that a vanishing theorem by Witten provides the protection mechanism, The other ungauged isometrics in hyper-moduli space could also be protected, depending on the gauge bundle structure. We also discuss the related issue in IIB setting. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Chuang, Wu-yen] Stanford Univ, ITP, Stanford, CA 94305 USA.
[Chuang, Wu-yen] Stanford Univ, SLAC, Menlo Pk, CA 94025 USA.
[Gao, Peng] Univ Penn, Philadelphia, PA 19104 USA.
RP Chuang, WY (reprint author), Stanford Univ, ITP, Stanford, CA 94305 USA.
EM wychuang@gmail.com; gaopeng@sas.upenn.edu
RI Gao, Peng/O-5941-2015;
OI Gao, Peng/0000-0003-1829-3764; Chuang, Wu-Yen/0000-0003-3230-3252
FU DOE [DE-AC03-76SF00515, DE-FG02-95ER40893]
FX W.Y.C. received support from the DOE under contract DE-AC03-76SF00515.
P.G. is supported in part by DOE grant DE-FG02-95ER40893.
NR 26
TC 0
Z9 0
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0550-3213
J9 NUCL PHYS B
JI Nucl. Phys. B
PD MAY 1
PY 2010
VL 830
IS 1-2
BP 271
EP 277
DI 10.1016/j.nuclphysb.2009.12.034
PG 7
WC Physics, Particles & Fields
SC Physics
GA 563RB
UT WOS:000275150000010
ER
PT J
AU Chang, GS
AF Chang, Gray S.
TI Comments on "Numerical Stability of Existing Monte Carlo Burnup Codes in
Cycle Calculations of Critical Reactors"
SO NUCLEAR SCIENCE AND ENGINEERING
LA English
DT Letter
C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Chang, GS (reprint author), Idaho Natl Lab, POB 1625,MS 3885, Idaho Falls, ID 83415 USA.
NR 11
TC 2
Z9 2
U1 0
U2 1
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5639
J9 NUCL SCI ENG
JI Nucl. Sci. Eng.
PD MAY
PY 2010
VL 165
IS 1
BP 128
EP 130
PG 3
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 590CJ
UT WOS:000277201000006
ER
PT J
AU Densmore, D
Hsiau, THC
Kittleson, JT
DeLoache, W
Batten, C
Anderson, JC
AF Densmore, Douglas
Hsiau, Timothy H. -C.
Kittleson, Joshua T.
DeLoache, Will
Batten, Christopher
Anderson, J. Christopher
TI Algorithms for automated DNA assembly
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID CONSTRUCTION; STRATEGIES; EXPRESSION; MOLECULES; DESIGN
AB Generating a defined set of genetic constructs within a large combinatorial space provides a powerful method for engineering novel biological functions. However, the process of assembling more than a few specific DNA sequences can be costly, time consuming and error prone. Even if a correct theoretical construction scheme is developed manually, it is likely to be suboptimal by any number of cost metrics. Modular, robust and formal approaches are needed for exploring these vast design spaces. By automating the design of DNA fabrication schemes using computational algorithms, we can eliminate human error while reducing redundant operations, thus minimizing the time and cost required for conducting biological engineering experiments. Here, we provide algorithms that optimize the simultaneous assembly of a collection of related DNA sequences. We compare our algorithms to an exhaustive search on a small synthetic dataset and our results show that our algorithms can quickly find an optimal solution. Comparison with random search approaches on two real-world datasets show that our algorithms can also quickly find lower-cost solutions for large datasets.
C1 [Densmore, Douglas] Joint BioEnergy Inst, Dept Fuel Synth, Emeryville, CA 94608 USA.
[Densmore, Douglas; Hsiau, Timothy H. -C.; Kittleson, Joshua T.; DeLoache, Will; Anderson, J. Christopher] Univ Calif Berkeley, Dept Bioengn, Berkeley, CA 94720 USA.
[DeLoache, Will] Davidson Coll, Dept Biol, Davidson, NC 28036 USA.
[Batten, Christopher] Cornell Univ, Sch Elect & Comp Engn, Ithaca, NY 14853 USA.
[Anderson, J. Christopher] Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Calif Inst Quantitat Biol Res QB3, Berkeley, CA 94720 USA.
RP Densmore, D (reprint author), Joint BioEnergy Inst, Dept Fuel Synth, 5885 Hollis St,4th Floor, Emeryville, CA 94608 USA.
EM dmdensmore@lbl.gov
FU National Science Foundation (NSF) [CCR-0225610, 0720882, 0647591,
0720841]; Department of Defense National Defense Science and
Engineering; Amgen Scholars Program; Center for Hybrid and Embedded
Software Systems (CHESS) at University of California, Berkeley; US Army
Research Office (ARO) [W911NF-07-2-0019]; US Air Force Office of
Scientific Research (MURI) [FA9550-06-0312, FA9550-06-1-0244]; Air Force
Research Lab (AFRL); State of California Micro Program; Agilent; Bosch;
Lockheed Martin; National Instruments; Thales and Toyota; Synthetic
Biology Engineering Research Center (SynBERC)
FX National Science Foundation Graduate Research Fellowships (to T.H.H. and
J.T.K.); Department of Defense National Defense Science and Engineering
Graduate Fellowship (to T. H. H.); Amgen Scholars Program (to W. D.) and
the Center for Hybrid and Embedded Software Systems (CHESS) at
University of California, Berkeley. CHESS receives support from the
National Science Foundation [NSF awards #CCR-0225610 (ITR), #0720882
(CSR-EHS: PRET), #0647591 (CSR-SGER) and #0720841 (CSR-CPS)]; US Army
Research Office (ARO #W911NF-07-2-0019); US Air Force Office of
Scientific Research (MURI #FA9550-06-0312 and AF-TRUST
#FA9550-06-1-0244); Air Force Research Lab (AFRL), the State of
California Micro Program and the following companies: Agilent, Bosch,
Lockheed Martin, National Instruments, Thales and Toyota. Funding for
open access charge: The Synthetic Biology Engineering Research Center
(SynBERC).
NR 20
TC 30
Z9 33
U1 2
U2 9
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD MAY
PY 2010
VL 38
IS 8
BP 2607
EP 2616
DI 10.1093/nar/gkq165
PG 10
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 590PK
UT WOS:000277238900011
PM 20335162
ER
PT J
AU Afonso, B
Silver, PA
Ajo-Franklin, CM
AF Afonso, Bruno
Silver, Pamela A.
Ajo-Franklin, Caroline M.
TI A synthetic circuit for selectively arresting daughter cells to create
aging populations
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID TRANSCRIPTION FACTOR ACE2P; SACCHAROMYCES-CEREVISIAE;
NUCLEAR-LOCALIZATION; FLUORESCENT PROTEIN; YEAST; BIOLOGY; INHIBITOR;
PHOSPHORYLATION; COMMUNICATION; DEGRADATION
AB The ability to engineer genetic programs governing cell fate will permit new safeguards for engineered organisms and will further the biological understanding of differentiation and aging. Here, we have designed, built and implemented a genetic device in the budding yeast Saccharomyces cerevisiae that controls cell-cycle progression selectively in daughter cells. The synthetic device was built in a modular fashion by combining timing elements that are coupled to the cell cycle, i.e. cell-cycle specific promoters and protein degradation domains, and an enzymatic domain which conditionally confers cell arrest. Thus, in the presence of a drug, the device is designed to arrest growth of only newly-divided daughter cells in the population. Indeed, while the engineered cells grow normally in the absence of drug, with the drug the engineered cells display reduced, linear growth on the population level. Fluorescence microscopy of single cells shows that the device induces cell arrest exclusively in daughter cells and radically shifts the age distribution of the resulting population towards older cells. This device, termed the 'daughter arrester', provides a blueprint for more advanced devices that mimic developmental processes by having control over cell growth and death.
C1 [Afonso, Bruno; Silver, Pamela A.] Harvard Univ, Sch Med, Dept Syst Biol, Boston, MA 02115 USA.
[Ajo-Franklin, Caroline M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Silver, PA (reprint author), Harvard Univ, Sch Med, Dept Syst Biol, Boston, MA 02115 USA.
EM pamela_silver@hms.harvard.edu; cajo-franklin@lbl.gov
FU Fundacao para a Ciencia e a Tecnologia; GABBA Program
[SFRH/BD/15237/2004]; Office of Science, Office of Basic Energy
Sciences, Division of Materials Sciences and Engineering, of the US
Department of Energy [DE-AC02-05CH11231]
FX PhD fellowship from Fundacao para a Ciencia e a Tecnologia and GABBA
Program (grant number SFRH/BD/15237/2004 to B. A.); Director, Office of
Science, Office of Basic Energy Sciences, Division of Materials Sciences
and Engineering, of the US Department of Energy (Contract No.
DE-AC02-05CH11231 to C.A-F.); Experimental design, data analysis and
manuscript preparation performed by B. A. Data analysis and manuscript
preparation performed by C.A-F. at the Molecular Foundry. Funding for
open access charge: Director, Office of Science, Office of Basic Energy
Sciences, Division of Materials Sciences and Engineering, of the U.S.
Department of Energy [Contract No. DE-AC02-05CH11231 to C.A-F.].
NR 33
TC 10
Z9 10
U1 0
U2 8
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD MAY
PY 2010
VL 38
IS 8
BP 2727
EP 2735
DI 10.1093/nar/gkq075
PG 9
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 590PK
UT WOS:000277238900022
PM 20150416
ER
PT J
AU Carothers, JM
Goler, JA
Kapoor, Y
Lara, L
Keasling, JD
AF Carothers, James M.
Goler, Jonathan A.
Kapoor, Yuvraaj
Lara, Lesley
Keasling, Jay D.
TI Selecting RNA aptamers for synthetic biology: investigating magnesium
dependence and predicting binding affinity
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID NUCLEIC-ACID APTAMERS; IN-VITRO SELECTION; GENE-EXPRESSION; HAMMERHEAD
RIBOZYME; SMALL MOLECULES; METAL-IONS; LIGAND; RECOGNITION; RIBOSWITCH;
COMPLEX
AB The ability to generate RNA aptamers for synthetic biology using in vitro selection depends on the informational complexity (IC) needed to specify functional structures that bind target ligands with desired affinities in physiological concentrations of magnesium. We investigate how selection for high-affinity aptamers is constrained by chemical properties of the ligand and the need to bind in low magnesium. We select two sets of RNA aptamers that bind planar ligands with dissociation constants (K(d)s) ranging from 65 nM to 100 mu M in physiological buffer conditions. Aptamers selected to bind the non-proteinogenic amino acid, p-amino phenylalanine (pAF), are larger and more informationally complex (i.e., rarer in a pool of random sequences) than aptamers selected to bind a larger fluorescent dye, tetramethylrhodamine (TMR). Interestingly, tighter binding aptamers show less dependence on magnesium than weaker-binding aptamers. Thus, selection for high-affinity binding may automatically lead to structures that are functional in physiological conditions (1-2.5 mM Mg(2+)). We hypothesize that selection for high-affinity binding in physiological conditions is primarily constrained by ligand characteristics such as molecular weight (MW) and the number of rotatable bonds. We suggest that it may be possible to estimate aptamer-ligand affinities and predict whether a particular aptamer-based design goal is achievable before performing the selection.
C1 [Carothers, James M.; Goler, Jonathan A.; Kapoor, Yuvraaj; Lara, Lesley; Keasling, Jay D.] Univ Calif Berkeley, Calif Inst Quantitat Biosci, Berkeley, CA 94720 USA.
[Carothers, James M.; Goler, Jonathan A.; Kapoor, Yuvraaj; Lara, Lesley; Keasling, Jay D.] Univ Calif Berkeley, Berkeley Ctr Synthet Biol, Berkeley, CA 94720 USA.
[Carothers, James M.; Goler, Jonathan A.; Kapoor, Yuvraaj; Lara, Lesley; Keasling, Jay D.] Joint BioEnergy Inst, Emeryville, CA 94608 USA.
[Goler, Jonathan A.; Keasling, Jay D.] Univ Calif Berkeley, Synthet Biol Engn Res Ctr, Berkeley, CA 94720 USA.
[Keasling, Jay D.] Univ Calif Berkeley, Dept Bioengn, Berkeley, CA 94720 USA.
[Keasling, Jay D.] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
[Keasling, Jay D.] Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Keasling, JD (reprint author), Univ Calif Berkeley, Calif Inst Quantitat Biosci, Berkeley, CA 94720 USA.
EM keasling@berkeley.edu
RI Keasling, Jay/J-9162-2012
OI Keasling, Jay/0000-0003-4170-6088
FU Joint BioEnergy Institute; US Department of Energy [DE-AC02-05CH11231];
Synthetic Biology Engineering Research Center through a grant from the
National Science Foundation [BES-0439124]; Jane Coffin Childs Memorial
Fund
FX This work was supported by the Joint BioEnergy Institute through a
contract between Lawrence Berkeley National Laboratory and the US
Department of Energy (DE-AC02-05CH11231); and the Synthetic Biology
Engineering Research Center through a grant from the National Science
Foundation [BES-0439124]. J.M.C. was supported in part by a Jane Coffin
Childs Memorial Fund Postdoctoral Fellowship. Funding for open access
charge: National Science Foundation [BES-0439124].
NR 58
TC 34
Z9 36
U1 3
U2 35
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD MAY
PY 2010
VL 38
IS 8
BP 2736
EP 2747
DI 10.1093/nar/gkq082
PG 12
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 590PK
UT WOS:000277238900023
PM 20159999
ER
PT J
AU Di Niro, R
Sulic, AM
Mignone, F
D'Angelo, S
Bordoni, R
Iacono, M
Marzari, R
Gaiotto, T
Lavric, M
Bradbury, ARM
Biancone, L
Zevin-Sonkin, D
De Bellis, G
Santoro, C
Sblattero, D
AF Di Niro, Roberto
Sulic, Ana-Marija
Mignone, Flavio
D'Angelo, Sara
Bordoni, Roberta
Iacono, Michele
Marzari, Roberto
Gaiotto, Tiziano
Lavric, Miha
Bradbury, Andrew R. M.
Biancone, Luigi
Zevin-Sonkin, Dina
De Bellis, Gianluca
Santoro, Claudio
Sblattero, Daniele
TI Rapid interactome profiling by massive sequencing
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID OPEN READING FRAMES; TISSUE TRANSGLUTAMINASE; PHAGE DISPLAY;
BINDING-PROTEINS; EFFICIENT IDENTIFICATION; CDNA LIBRARIES; IN-VIVO;
SELECTION; SOLUBILITY; EXPRESSION
AB We have developed a high-throughput protein expression and interaction analysis platform that combines cDNA phage display library selection and massive gene sequencing using the 454 platform. A phage display library of open reading frame (ORF) fragments was created from mRNA derived from different tissues. This was used to study the interaction network of the enzyme transglutaminase 2 (TG2), a multifunctional enzyme involved in the regulation of cell growth, differentiation and apoptosis, associated with many different pathologies. After two rounds of panning with TG2 we assayed the frequency of ORFs within the selected phage population using 454 sequencing. Ranking and analysis of more than 120 000 sequences allowed us to identify several potential interactors, which were subsequently confirmed in functional assays. Within the identified clones, three had been previously described as interacting proteins (fibronectin, SMOC1 and GSTO2), while all the others were new. When compared with standard systems, such as microtiter enzyme-linked immunosorbant assay, the method described here is dramatically faster and yields far more information about the interaction under study, allowing better characterization of complex systems. For example, in the case of fibronectin, it was possible to identify the specific domains involved in the interaction.
C1 [D'Angelo, Sara; Santoro, Claudio; Sblattero, Daniele] Univ Piemonte Orientale, Dept Med Sci, Novara, Italy.
[D'Angelo, Sara; Santoro, Claudio; Sblattero, Daniele] Univ Piemonte Orientale, IRCAD, Novara, Italy.
[Mignone, Flavio] Univ Milan, Sch Pharm, Dept Struct Chem & Inorgan Stereochem, Milan, Italy.
[Di Niro, Roberto; Sulic, Ana-Marija; Marzari, Roberto; Gaiotto, Tiziano; Lavric, Miha] Univ Trieste, Dept Life Sci, Trieste, Italy.
[Bordoni, Roberta; Iacono, Michele; De Bellis, Gianluca] Natl Res Council ITB CNR, Inst Biomed Technol, Milan, Italy.
[Bradbury, Andrew R. M.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Biancone, Luigi] Univ Turin, CERMS, Turin, Italy.
[Zevin-Sonkin, Dina] Quark Pharmaceut Inc, QBI Enterprises Inc, Ness Ziona, Israel.
RP Sblattero, D (reprint author), Univ Piemonte Orientale, Dept Med Sci, Novara, Italy.
EM daniele.sblattero@med.unipmn.it
RI santoro, claudio/G-6819-2012; De Bellis, Gianluca/H-9725-2013;
OI De Bellis, Gianluca/0000-0002-1622-4477; Bradbury,
Andrew/0000-0002-5567-8172
FU Fondazione CRT Progetto Alfier; Fondazione Cariplo Bando Ricerca
Biomedica; National Institutes of Health [NIH] [RFA-DK-06-002];
Compagnia Sanpaolo; EC [MRTN-CT-2006-036032]
FX FUNDING; Fondazione CRT Progetto Alfieri; Fondazione Cariplo Bando
Ricerca Biomedica 2009; National Institutes of Health [NIH
RFA-DK-06-002] to D. S.; Compagnia Sanpaolo to C. S.; EC Marie Curie
Research Training Network [contract n. MRTN-CT-2006-036032] to R. M.
Funding for open access charge: Fondazione CRT Progetto Alfieri.
NR 40
TC 36
Z9 36
U1 3
U2 6
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD MAY
PY 2010
VL 38
IS 9
AR e110
DI 10.1093/nar/gkq052
PG 10
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 600NV
UT WOS:000277994600007
PM 20144949
ER
PT J
AU Barber, SK
Anderson, EH
Cambie, R
Marchesini, S
McKinney, WR
Takacs, PZ
Voronov, DL
Yashchuk, VV
AF Barber, Samuel K.
Anderson, Erik H.
Cambie, Rossana
Marchesini, Stefano
McKinney, Wayne R.
Takacs, Peter Z.
Voronov, Dmitry L.
Yashchuk, Valeriy V.
TI Stability of modulation transfer function calibration of surface
profilometers using binary pseudo-random gratings and arrays with
nonideal groove shapes
SO OPTICAL ENGINEERING
LA English
DT Article
DE surface metrology; surface profilometer; interferometric microscope;
modulation transfer function; power spectral density; calibration;
fabrication tolerances; metrology of x-ray optics
ID TARGETS
C1 [Barber, Samuel K.; Anderson, Erik H.; Cambie, Rossana; Marchesini, Stefano; McKinney, Wayne R.; Voronov, Dmitry L.; Yashchuk, Valeriy V.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Takacs, Peter Z.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Barber, SK (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd,M-S 2R0400, Berkeley, CA 94720 USA.
EM SBarber@lbl.gov; Takacs@bnl.gov
RI Marchesini, Stefano/A-6795-2009; McKinney, Wayne/F-2027-2014
OI McKinney, Wayne/0000-0003-2586-3139
FU Office of Science, Office of Basic Energy Sciences, Material Science
Division, of the U. S. Department of Energy [DE-AC02-05CH11231]; United
States Government
FX The authors are grateful Howard Padmore for extremely useful
discussions. The Advanced Light Source is supported by the Director,
Office of Science, Office of Basic Energy Sciences, Material Science
Division, of the U. S. Department of Energy under Contract No.
DE-AC02-05CH11231 at Lawrence Berkeley National Laboratory.; This
document was prepared as an account of work sponsored by the United
States Government. While this document is believed to contain correct
information, neither the United States Government nor any agency
thereof, nor The Regents of the University of California, nor any of
their employees, makes any warranty, express or implied, or assumes any
legal responsibility for the accuracy, completeness, or usefulness of
any information, apparatus, product, or process disclosed, or represents
that its use would not infringe privately owned rights. Reference herein
to any specific commercial product, process, or service by its trade
name, trademark, manufacturer, or otherwise, does not necessarily
constitute or imply its endorsement, recommendation, or favoring by the
United States Government or any agency thereof, or The Regents of the
University of California. The views and opinions of authors expressed
herein do not necessarily state or reflect those of the United States
Government or any agency thereof or The Regents of the University of
California.
NR 25
TC 6
Z9 6
U1 0
U2 0
PU SPIE-SOC PHOTOPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
J9 OPT ENG
JI Opt. Eng.
PD MAY
PY 2010
VL 49
IS 5
AR 053606
DI 10.1117/1.3431659
PG 9
WC Optics
SC Optics
GA 622BB
UT WOS:000279632000015
ER
PT J
AU Matthews, MJ
Vignes, RM
Cooke, D
Yang, ST
Stolken, JS
AF Matthews, Manyalibo J.
Vignes, Ryan M.
Cooke, Diane
Yang, Steven T.
Stolken, James S.
TI Analysis of microstructural relaxation phenomena in laser-modified fused
silica using confocal Raman microscopy
SO OPTICS LETTERS
LA English
DT Article
ID FICTIVE TEMPERATURE; PLANAR RINGS; GLASS
AB Fused-silica microstructural changes associated with localized 10.6 mu m CO2 laser heating are reported. Spatially resolved shifts in the high-frequency asymmetric stretch transverse-optic phonon mode of SiO2 were measured using confocal Raman microscopy, allowing construction of axial fictive temperature (T-f) maps for various laser-heating conditions. A Fourier conduction-based finite-element model was employed to compute on-axis temperature-time histories, and, in conjunction with a Tool-Narayanaswamy form for structural relaxation, used to fit T-f(z) profiles to extract relaxation parameters. Good agreement between the calculated and measured T-f was found, yielding reasonable values for relaxation time and activation enthalpy in the laser-modified silica.
C1 [Matthews, Manyalibo J.; Vignes, Ryan M.; Cooke, Diane; Yang, Steven T.; Stolken, James S.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Matthews, MJ (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave,L-592, Livermore, CA 94550 USA.
EM ibo@llnl.gov
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]
FX This work performed under the auspices of the U.S. Department of Energy
by Lawrence Livermore National Laboratory under contract
DE-AC52-07NA27344.
NR 21
TC 14
Z9 14
U1 1
U2 8
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD MAY 1
PY 2010
VL 35
IS 9
BP 1311
EP 1313
DI 10.1364/OL.35.001311
PG 3
WC Optics
SC Optics
GA 590IU
UT WOS:000277219800003
PM 20436552
ER
PT J
AU Sarantos, CH
Heebner, JE
AF Sarantos, Chris H.
Heebner, John E.
TI Solid-state ultrafast all-optical streak camera enabling
high-dynamic-range picosecond recording
SO OPTICS LETTERS
LA English
DT Article
ID SLAB WAVE-GUIDES; SPATIAL SOLITONS; DEFLECTION; BEAM; MODULATION;
INGAASP; SILICON; CARRIER; PULSES; PRISM
AB We demonstrate an ultrafast optical recording system based on a novel optical beam deflection technique. An optical pump temporarily creates an array of prisms that deflect an optical signal beam within a GaAs/AlGaAs planar waveguide. The fabricated device yielded, to our knowledge, the fastest sustained optical deflection reported to date and was used to create spatial representations of ultrafast temporal waveforms. A conventional camera was then used to record single-shot waveforms with a 2.5 ps resolution over a 50 ps record with a dynamic range in excess of 3000:1. Through further development, this all-optical streak camera could provide insight into previously unmeasurable phenomena in many fields. (C) 2010 Optical Society of America
C1 [Sarantos, Chris H.; Heebner, John E.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Sarantos, Chris H.] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA.
RP Heebner, JE (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA.
EM heebner@llnl.gov
RI Heebner, John/C-2411-2009
FU U.S. Department of Energy (DOE) [DE-AC52-07NA27344]; LLNL Laboratory
FX We thank Susan Haynes, Nadir Dagli, and Georg Albrecht for contributions
to this project. This work performed under the auspices of the U.S.
Department of Energy (DOE) by Lawrence Livermore National Laboratory
(LLNL) under contract DE-AC52-07NA27344. The project was supported
through LLNL Laboratory-Directed Research and Development Funding.
NR 22
TC 13
Z9 19
U1 4
U2 15
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD MAY 1
PY 2010
VL 35
IS 9
BP 1389
EP 1391
DI 10.1364/OL.35.001389
PG 3
WC Optics
SC Optics
GA 590IU
UT WOS:000277219800030
PM 20436579
ER
PT J
AU Tomov, S
Dongarra, J
Baboulin, M
AF Tomov, Stanimire
Dongarra, Jack
Baboulin, Marc
TI Towards dense linear algebra for hybrid GPU accelerated manycore systems
SO PARALLEL COMPUTING
LA English
DT Article
DE Hybrid computing; Dense linear algebra; Parallel algorithms; Multicore
processors; Graphics processing units
AB We highlight the trends leading to the increased appeal of using hybrid multicore + GPU systems for high performance computing. We present a set of techniques that can be used to develop efficient dense linear algebra algorithms for these systems. We illustrate the main ideas with the development of a hybrid LU factorization algorithm where we split the computation over a multicore and a graphics processor, and use particular techniques to reduce the amount of pivoting and communication between the hybrid components. This results in an efficient algorithm with balanced use of a multicore processor and a graphics processor. (C) 2010 Elsevier By. All rights reserved.
C1 [Tomov, Stanimire; Dongarra, Jack; Baboulin, Marc] Univ Tennessee, Dept Elect Engn & Comp Sci, Knoxville, TN 37996 USA.
[Dongarra, Jack] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Dongarra, Jack] Univ Manchester, Manchester M13 9PL, Lancs, England.
[Baboulin, Marc] Univ Coimbra, Dept Math, P-3001454 Coimbra, Portugal.
RP Tomov, S (reprint author), Univ Tennessee, Dept Elect Engn & Comp Sci, 1122 Volunteer Blvd, Knoxville, TN 37996 USA.
EM tomov@eecs.utk.edu; dongarra@eecs.utk.edu; baboulin@mat.uc.pt
RI Dongarra, Jack/E-3987-2014
FU US National Science Foundation; US Department of Energy
FX Part of this work was supported by the US National Science Foundation
and the US Department of Energy. We thank NVIDIA and NVIDIA's Professor
Partnership Program for their hardware donations. We thank also Jim
Demmel and Vasily Volkov from UC Berkeley, and Massimiliano Fatica from
NVIDIA for helpful discussions related to GPU computing.
NR 38
TC 84
Z9 85
U1 0
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-8191
J9 PARALLEL COMPUT
JI Parallel Comput.
PD MAY-JUN
PY 2010
VL 36
IS 5-6
SI SI
BP 232
EP 240
DI 10.1016/j.parco.2009.12.005
PG 9
WC Computer Science, Theory & Methods
SC Computer Science
GA 614UX
UT WOS:000279086400003
ER
PT J
AU Dahal, HP
Wehling, TO
Bedell, KS
Zhu, JX
Balatsky, AV
AF Dahal, Hari P.
Wehling, Tim O.
Bedell, Kevin S.
Zhu, Jian-Xin
Balatsky, A. V.
TI Charge inhomogeneity in a single and bilayer graphene
SO PHYSICA B-CONDENSED MATTER
LA English
DT Article
DE Graphene; Charge instability; CDW state; Local density of states
ID GAS
AB We study the possibility of charge ordered state in both single and bilayer graphene using a real space tight binding model. We argue that there is no charge ordered state in a single layer graphene. We also predict that the bilayer graphene can undergo a transition to a charge ordered state that is a commensurate CDW at low enough carrier density. We find that aside from the Coulomb interaction of the carriers of two layers that stabilizes the charge ordered state, so does the inter layer coupling. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Dahal, Hari P.; Wehling, Tim O.; Zhu, Jian-Xin; Balatsky, A. V.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Wehling, Tim O.] Univ Hamburg, Inst Theoret Phys 1, D-20355 Hamburg, Germany.
[Bedell, Kevin S.] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA.
[Balatsky, A. V.] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA.
RP Dahal, HP (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM hpd@lanl.gov
RI Wehling, Tim/O-4642-2014;
OI Wehling, Tim/0000-0002-5579-2231; Zhu, Jianxin/0000-0001-7991-3918
FU US DOE
FX We are grateful to E. Andrei, A. Geim, A. Lichtenstein, M. Katsnelson,
A. Morpurgo, A. H. Castro Neto, G. Lee, P. Littlewood and H. Fukuyama
for useful discussions. We would like to thank Andrew Heim for his help
to develop the code for the iteration. This work has been supported by
US DOE.
NR 18
TC 10
Z9 10
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0921-4526
J9 PHYSICA B
JI Physica B
PD MAY 1
PY 2010
VL 405
IS 9
BP 2241
EP 2244
DI 10.1016/j.physb.2010.02.019
PG 4
WC Physics, Condensed Matter
SC Physics
GA 596XQ
UT WOS:000277719500020
ER
PT J
AU Reurings, F
Tuomisto, F
Egger, W
Lowe, B
Ravelli, L
Sojak, S
Liliental-Weber, Z
Jones, RE
Yu, KM
Walukiewicz, W
Schaff, WJ
AF Reurings, Floris
Tuomisto, Filip
Egger, Werner
Loewe, Benjamin
Ravelli, Luca
Sojak, Stanislav
Liliental-Weber, Zuzanna
Jones, Rebecca E.
Yu, Kin M.
Walukiewicz, Wladek
Schaff, William J.
TI Irradiation-induced defects in InN and GaN studied with positron
annihilation
SO PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Fall Meeting of the European-Materials-Research-Society
CY SEP 14-18, 2009
CL Warsaw, POLAND
SP European Mat Res Soc
DE InN and GaN films; irradiation-induced defects; positron annihilation;
vacancy formation
ID MOLECULAR-BEAM EPITAXY; FUNDAMENTAL-BAND GAP; ELECTRON-TRANSPORT;
WURTZITE INN; ENERGY; VACANCIES; ALLOYS
AB We use positron annihilation to study 2-MeV (4)He(+) irradiated and subsequently rapid-thermal-annealed InN grown by molecular-beam epitaxy and GaN grown by metal-organic chemical-vapour deposition. The irradiation fluences were in the range 5 x 10(14)-2 x 10(16)cm(-2). In vacancies are introduced in the irradiation at a low rate of 100cm(-1), with their concentration saturating in the mid-10(17) cm(-3) range at an irradiation fluence of 2 x 10(15) cm(-2). The annealing, performed at temperatures between 425 and 475 degrees C, is observed to result in an inhomogeneous redistribution of the In vacancies. The behaviour is opposite to GaN, where Ga vacancies are introduced at a much higher rate of 3600 cm(-1) showing no detectable saturation. About half of the Ga vacancies are found to recover in the annealing, in agreement with previous studies, while the remaining Ga vacancies undergo no spatial redistribution. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
C1 [Reurings, Floris; Tuomisto, Filip] Aalto Univ, Dept Appl Phys, Aalto Espoo 00076, Finland.
[Egger, Werner; Loewe, Benjamin] Univ Bundeswehr Munchen, Inst Angew Phys & Messtech, D-87755 Neubiberg, Germany.
[Ravelli, Luca] Univ Trent, Dipartimento Fis, I-38123 Povo, TN, Italy.
[Sojak, Stanislav] Slovak Tech Univ Bratislava, Dept Nucl Phys & Technol, Bratislava 81219, Slovakia.
[Liliental-Weber, Zuzanna; Jones, Rebecca E.; Yu, Kin M.; Walukiewicz, Wladek] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Schaff, William J.] Cornell Univ, Dept Elect & Comp Engn, Ithaca, NY 14853 USA.
RP Reurings, F (reprint author), Aalto Univ, Dept Appl Phys, POB 11100, Aalto Espoo 00076, Finland.
EM floris.reurings@tkk.fi; filip.tuomisto@tkk.fi
RI Tuomisto, Filip/B-8189-2008; Liliental-Weber, Zuzanna/H-8006-2012; Yu,
Kin Man/J-1399-2012
OI Tuomisto, Filip/0000-0002-6913-5654; Yu, Kin Man/0000-0003-1350-9642
NR 22
TC 8
Z9 8
U1 1
U2 10
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1862-6300
J9 PHYS STATUS SOLIDI A
JI Phys. Status Solidi A-Appl. Mat.
PD MAY
PY 2010
VL 207
IS 5
BP 1087
EP 1090
DI 10.1002/pssa.200983111
PG 4
WC Materials Science, Multidisciplinary; Physics, Applied; Physics,
Condensed Matter
SC Materials Science; Physics
GA 608UE
UT WOS:000278610700013
ER
PT J
AU White, MS
Olson, DC
Kopidakis, N
Nardes, AM
Ginley, DS
Berry, JJ
AF White, Matthew S.
Olson, Dana C.
Kopidakis, Nikos
Nardes, Alexandre M.
Ginley, David S.
Berry, Joseph J.
TI Control of charge separation by electric field manipulation in
polymer-oxide hybrid organic photovoltaic bilayer devices
SO PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
LA English
DT Article
ID HETEROJUNCTION SOLAR-CELLS; OPEN-CIRCUIT VOLTAGE; IMPEDANCE
SPECTROSCOPY; CONJUGATED POLYMER; CARRIER MOBILITY; FILMS;
POLY(3-HEXYLTHIOPHENE); INTERFACES
AB Hybrid polymer/oxide organic photovoltaic (h-OPV) devices have the potential to replace the organic acceptor component with an inorganic, nano-structured oxide. This approach leverages the positive attributes of inorganic materials while maintaining the potential processing advantages of organic electronics. By manipulating the carrier concentration of the oxide acceptor layer in bilayer h-OPV devices, we demonstrate control of the electric field at the planar donor acceptor interface. The effects of the electric field can be observed in both the J(SC) and the fill factor of the h-OPV devices. Furthermore, interfacial layers of TiO(x) are used on ZnO to prevent recombination of geminate electron hole pairs. It is shown that interfacial TiO(x) successfully inhibits recombination only when the electric field is strong enough to sufficiently transfer charges to the ZnO layer. If the interfacial electric field is insufficient, then the TiO(x) instead serves to enhance recombination at the donor acceptor interface. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
C1 [Olson, Dana C.; Kopidakis, Nikos; Ginley, David S.; Berry, Joseph J.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[White, Matthew S.] Univ Colorado, Dept Phys, Boulder, CO 80309 USA.
[Nardes, Alexandre M.] Univ Denver, Dept Phys & Astron, Denver, CO 80208 USA.
RP Berry, JJ (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM joseph.berry@nrel.gov
RI Nardes, Alexandre/C-8556-2012; White, Matthew/B-3405-2013; Kopidakis,
Nikos/N-4777-2015
OI White, Matthew/0000-0001-6719-790X;
NR 30
TC 8
Z9 8
U1 2
U2 20
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1862-6300
J9 PHYS STATUS SOLIDI A
JI Phys. Status Solidi A-Appl. Mat.
PD MAY
PY 2010
VL 207
IS 5
BP 1257
EP 1265
DI 10.1002/pssa.200925591
PG 9
WC Materials Science, Multidisciplinary; Physics, Applied; Physics,
Condensed Matter
SC Materials Science; Physics
GA 608UE
UT WOS:000278610700045
ER
PT J
AU Alna'washi, GA
Lu, M
Habibi, M
Phaneuf, RA
Kilcoyne, ALD
Schlachter, AS
Cisneros, C
McLaughlin, BM
AF Alna'washi, Ghassan A.
Lu, M.
Habibi, M.
Phaneuf, R. A.
Kilcoyne, A. L. D.
Schlachter, A. S.
Cisneros, C.
McLaughlin, B. M.
TI Valence-shell photoionization of the chlorinelike Ca3+ ion
SO PHYSICAL REVIEW A
LA English
DT Article
ID ATOMIC CHLORINE; ELECTRON-IMPACT; HIGH-RESOLUTION; CROSS-SECTIONS;
EXCITATION; STATES; 3S
AB Absolute photoionization measurements were performed for a mixture of P-2(3/2)o ground-state and P-2(1/2)o metastable-state Ca3+ ions over the photon energy range 65.7-104.6 eV by merging an ion beam with a beam of monochromatized synchrotron radiation. The ionization threshold energy of the P-2(3/2)o ground state was measured to be 67.063 +/-0.015 eV, which is 0.207 eV lower than the value tabulated in the NIST database. Most of the observed resonances associated with multiple Rydberg series of autoionizing states have been assigned spectroscopically using the quantum defect form of the Rydberg formula, guided by relativistic Hartree-Fock calculations of resonance energies and oscillator strengths. Intermediate coupling R-matrix calculations performed using the semi-relativistic Breit-Pauli approximation are in suitable agreement with measured absolute photoionization cross section in the energy range studied for this complex Cl-like ion species.
C1 [Alna'washi, Ghassan A.; Lu, M.; Habibi, M.; Phaneuf, R. A.] Univ Nevada, Dept Phys, Reno, NV 89557 USA.
[Kilcoyne, A. L. D.; Schlachter, A. S.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Cisneros, C.] Univ Nacl Autonoma Mexico, Inst Ciencias Fis, Cuernavaca 62210, Morelos, Mexico.
[McLaughlin, B. M.] Queens Univ Belfast, CTAMOP, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland.
[McLaughlin, B. M.] Harvard Smithsonian Ctr Astrophys, ITAMP, Cambridge, MA 02138 USA.
RP Alna'washi, GA (reprint author), Hashemite Univ, Dept Phys, Zarka, Jordan.
RI Kilcoyne, David/I-1465-2013
FU Division of Chemical Sciences, Geosciences, and Biosciences of the US
Department of Energy [DE-FG02-03ER15424]; US National Science
Foundation; PAPITUNAM, Mexico [IN109407-IN108009]
FX The Division of Chemical Sciences, Geosciences, and Biosciences of the
US Department of Energy supported the experimental research under Grant
No. DE-FG02-03ER15424. B.M.M. acknowledges support by the US National
Science Foundation through a grant to ITAMP at the HarvardSmithsonian
Center for Astrophysics. The computational work was carried out at the
National Energy Research Scientific Computing Center in Oakland,
California, which is supported by the US Department of Energy, and on
the Tera-grid at the National Institute for Computational Science (NICS)
in Tennessee, which is supported in part by the US National Science
Foundation. C.C. acknowledges support from PAPITUNAM IN109407-IN108009,
Mexico.
NR 32
TC 12
Z9 12
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAY
PY 2010
VL 81
IS 5
AR 053416
DI 10.1103/PhysRevA.81.053416
PG 9
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 602LF
UT WOS:000278140000124
ER
PT J
AU Bennink, RS
AF Bennink, Ryan S.
TI Optimal collinear Gaussian beams for spontaneous parametric
down-conversion
SO PHYSICAL REVIEW A
LA English
DT Article
ID ENTANGLED PHOTONS; GENERATION; SPACE; LIGHT
AB I investigate the properties of spontaneous parametric down-conversion (SPDC) involving collinear Gaussian spatial modes for the pump and the photon collection optics. Approximate analytical and numerical results are obtained for the peak spectral density, photon bandwidth, pair collection probability, heralding ratio, and spectral purity as a function of crystal length and beam-focusing parameters. I address the optimization of these properties individually as well as jointly, and find focusing conditions that simultaneously bring the pair collection probability, heralding ratio, and spectral purity to near-optimal values. These properties are also found to be nearly scale invariant, that is, ultimately independent of crystal length. The results obtained here are expected to be useful for designing SPDC sources with high performance in multiple categories for the next generation of SPDC applications.
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Bennink, RS (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM benninkrs@ornl.gov
FU Intelligence Advanced Research Projects Activity (IARPA); Oak Ridge
National Laboratory
FX The author thanks W. P. Grice, T. S. Humble, and P. G. Evans for helpful
discussions. This work was sponsored by the Intelligence Advanced
Research Projects Activity (IARPA) and by the Laboratory Directed
Research and Development Program of Oak Ridge National Laboratory,
managed by UT-Battelle, LLC, for the US Department of Energy.
NR 29
TC 36
Z9 36
U1 1
U2 12
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAY
PY 2010
VL 81
IS 5
AR 053805
DI 10.1103/PhysRevA.81.053805
PG 10
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 602LF
UT WOS:000278140000166
ER
PT J
AU Clementson, J
Beiersdorfer, P
AF Clementson, J.
Beiersdorfer, P.
TI Wavelength measurement of n=3 to n=3 transitions in highly charged
tungsten ions
SO PHYSICAL REVIEW A
LA English
DT Article
ID NA-LIKE IONS; MG-LIKE IONS; FLEXIBLE ATOMIC CODE; CU-LIKE IONS;
SOFT-X-RAY; ISOELECTRONIC SEQUENCE; ENERGY-LEVELS; LI-LIKE;
2S(1/2)-2P(3/2) LEVELS; PERTURBATION-THEORY
AB 3s(1/2)-3p(3/2) and 3p(1/2)-3d(3/2) transitions have been studied in potassiumlike W(55+) through neonlike W(64+) ions at the electron-beam ion trap facility in Livermore. The wavelengths of the lines have been measured in high resolution relative to well known reference lines from oxygen and nitrogen ions. Using the high-energy SuperEBIT electron-beam ion trap and an R = 44.3 m grazing-incidence soft-x-ray spectrometer, the lines were observed with a cryogenic charge-coupled device camera. The wavelength data for the sodiumlike and magnesiumlike tungsten lines are compared with theoretical predictions for ions along the isoelectronic sequences.
C1 [Clementson, J.; Beiersdorfer, P.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Clementson, J.] Lund Univ, Atom Phys Div, SE-22100 Lund, Sweden.
RP Clementson, J (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM clementson@llnl.gov
FU United States Department of Energy by Lawrence Livermore National
Laboratory [DE-AC52-07NA-27344]
FX This work was performed under the auspices of the United States
Department of Energy by Lawrence Livermore National Laboratory under
Contract No. DE-AC52-07NA-27344. The authors would like to thank Todd
Chambers, Miriam Frankel, Dr. Jaan Lepson, Debbie Miller, Yuri Podpaly,
Ed Magee, and Professor Elmar Trabert for assistance with the
measurement. The authors furthermore would like to thank Dr. K. T.
Cheng, Dr. Mau Chen, and Dr. Jonathan Sapirstein for making unpublished
results available. Joel Clementson would like to thank Dr. Hans
Lundberg, Dr. Sven Huldt, Professor Sune Svanberg, and Professor Tomas
Brage for their support.
NR 40
TC 38
Z9 38
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAY
PY 2010
VL 81
IS 5
AR 052509
DI 10.1103/PhysRevA.81.052509
PG 7
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 602LF
UT WOS:000278140000089
ER
PT J
AU Dumitriu, I
Bilodeau, RC
Gorczyca, TW
Walter, CW
Gibson, ND
Aguilar, A
Pesic, ZD
Rolles, D
Berrah, N
AF Dumitriu, I.
Bilodeau, R. C.
Gorczyca, T. W.
Walter, C. W.
Gibson, N. D.
Aguilar, A.
Pesic, Z. D.
Rolles, D.
Berrah, N.
TI Inner-shell photodetachment from Fe-
SO PHYSICAL REVIEW A
LA English
DT Article
ID PHOTOIONIZATION CROSS-SECTIONS; NEGATIVE-ION PHOTODETACHMENT;
ELECTRON-ATOM IONIZATION; THRESHOLD LAW; 2-ELECTRON PHOTOIONIZATION;
CORRELATED PROCESSES; SHAPE RESONANCE; METAL ATOMS; DYNAMICS; LI
AB Inner-shell photodetachment from Fe- was studied in the 48- to 72-eV photon energy range using a merged ion-photon-beam technique. The absolute photodetachment cross sections of Fe-, leading to Fe+ and Fe2+ ion production, were measured. The 3p -> (3d + epsilon d) photoexcitation in Fe- negative ions gives rise to shape resonances. In the near-threshold region, shape-resonance profiles with l = 2 accurately fit the single-photodetachment cross section. Simultaneous double photodetachment was also observed, resulting in an increased Fe2+ production which obeys a Wannier law. Despite the large number of possible terms resulting from the Fe- 3d open shell, a rough calculation using the R-matrix method qualitatively agrees well with the experimental data.
C1 [Dumitriu, I.; Bilodeau, R. C.; Gorczyca, T. W.; Pesic, Z. D.; Rolles, D.; Berrah, N.] Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA.
[Bilodeau, R. C.; Aguilar, A.; Pesic, Z. D.; Rolles, D.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Walter, C. W.; Gibson, N. D.] Denison Univ, Dept Phys & Astron, Granville, OH 43023 USA.
RP Dumitriu, I (reprint author), Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA.
OI Bilodeau, Rene/0000-0001-8607-2328
FU DOE, Office of Science, BES, Chemical, Geoscience and Biological
Divisions; DOE, Scientific User Facilities Division; NSF [0456916,
0757976]
FX This work was supported by DOE, Office of Science, BES, Chemical,
Geoscience and Biological Divisions. The ALS is funded by DOE,
Scientific User Facilities Division. N. D. Gibson and C. W. Walter
acknowledge support from NSF Grant Nos. 0456916 and 0757976.
NR 68
TC 5
Z9 5
U1 1
U2 3
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAY
PY 2010
VL 81
IS 5
AR 053404
DI 10.1103/PhysRevA.81.053404
PG 10
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 602LF
UT WOS:000278140000112
ER
PT J
AU Jiang, YH
Rudenko, A
Perez-Torres, JF
Herrwerth, O
Foucar, L
Kurka, M
Kuhnel, KU
Toppin, M
Plesiat, E
Morales, F
Martin, F
Lezius, M
Kling, MF
Jahnke, T
Dorner, R
Sanz-Vicario, JL
van Tilborg, J
Belkacem, A
Schulz, M
Ueda, K
Zouros, TJM
Dusterer, S
Treusch, R
Schroter, CD
Moshammer, R
Ullrich, J
AF Jiang, Y. H.
Rudenko, A.
Perez-Torres, J. F.
Herrwerth, O.
Foucar, L.
Kurka, M.
Kuehnel, K. U.
Toppin, M.
Plesiat, E.
Morales, F.
Martin, F.
Lezius, M.
Kling, M. F.
Jahnke, T.
Doerner, R.
Sanz-Vicario, J. L.
van Tilborg, J.
Belkacem, A.
Schulz, M.
Ueda, K.
Zouros, T. J. M.
Duesterer, S.
Treusch, R.
Schroeter, C. D.
Moshammer, R.
Ullrich, J.
TI Investigating two-photon double ionization of D-2 by XUV-pump-XUV-probe
experiments
SO PHYSICAL REVIEW A
LA English
DT Article
ID FREE-ELECTRON LASER; EXTREME-ULTRAVIOLET; DYNAMICS; SPECTROSCOPY;
COHERENCE; PULSES
AB We used a split-mirror setup attached to a reaction microscope at the free-electron laser in Hamburg (FLASH) to perform an XUV-pump-XUV-probe experiment by tracing the ultrafast nuclear wave-packet motion in the D-2(+)(1s sigma(g)) with 10 fs time resolution. Comparison with time-dependent calculations shows excellent agreement with the measured vibrational period of 22 +/- 4 fs in D-2(+), points to the importance of accurately knowing the internuclear distance-dependent ionization probability, and paves the way to control sequential and nonsequential two-photon double-ionization contributions.
C1 [Jiang, Y. H.; Kurka, M.; Kuehnel, K. U.; Toppin, M.; Schroeter, C. D.; Moshammer, R.; Ullrich, J.] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany.
[Rudenko, A.; Foucar, L.; Ullrich, J.] CFEL, Max Planck Adv Study Grp, D-22607 Hamburg, Germany.
[Perez-Torres, J. F.; Plesiat, E.; Morales, F.; Martin, F.] Univ Autonoma Madrid, Dept Quim C9, E-28049 Madrid, Spain.
[Herrwerth, O.; Lezius, M.; Kling, M. F.] Max Planck Inst Quantum Opt, D-85748 Garching, Germany.
[Jahnke, T.; Doerner, R.] Goethe Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany.
[Sanz-Vicario, J. L.] Univ Antioquia, Inst Fis, Medellin, Colombia.
[van Tilborg, J.; Belkacem, A.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Schulz, M.] Missouri Univ Sci & Technol Rolla, Rolla, MO 65409 USA.
[Ueda, K.] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan.
[Zouros, T. J. M.] Univ Crete, Dept Phys, Iraklion 71003, Crete, Greece.
[Duesterer, S.; Treusch, R.] DESY, D-22607 Hamburg, Germany.
RP Jiang, YH (reprint author), Max Planck Inst Kernphys, D-69117 Heidelberg, Germany.
RI Doerner, Reinhard/A-5340-2008; Zouros, Theo/C-7212-2011; Rudenko,
Artem/C-7412-2009; Kling, Matthias/D-3742-2014; Perez-Torres, Jhon
Fredy/G-4448-2014; Martin, Fernando/C-3972-2014; Plesiat,
Etienne/M-6248-2014; Treusch, Rolf/C-3935-2015;
OI Doerner, Reinhard/0000-0002-3728-4268; Zouros, Theo/0000-0002-5124-2128;
Rudenko, Artem/0000-0002-9154-8463; Perez-Torres, Jhon
Fredy/0000-0002-8991-2502; Martin, Fernando/0000-0002-7529-925X;
Treusch, Rolf/0000-0001-8479-8862
FU DFG [JI 110/2-2]; MICINN [FIS2007-60064]; NSF [PHY-0652519]
FX The authors are greatly indebted to the scientific and technical teams
at FLASH, in particular, the machine operators and run coordinators, who
strive for optimal beam-time conditions. Support from the Max-Planck
Advanced Study Group at CFEL is gratefully acknowledged. Y.H.J. is
grateful for support from DFG Project No. JI 110/2-2, J.F.P.-T., E. P.,
F.Mo., and F.Ma. from the MICINN Project No. FIS2007-60064, M. S. from
NSF Grant No. PHY-0652519, J.L.S. V. from UdeA and Colciencias, R. D.
and T.J. from DFG Koselleck Project, and O.H., M. L., and M. F. K. from
the DFG via the Emmy-Noether program and the Cluster of Excellence:
Munich Center for Advanced Photonics. The European COST Action "CUSPFEL"
(CM0702) is also acknowledged. Computations were carried out at Mare
Nostrum BSC and CCC-UAM.
NR 25
TC 37
Z9 38
U1 3
U2 21
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAY
PY 2010
VL 81
IS 5
AR 051402
DI 10.1103/PhysRevA.81.051402
PG 4
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 602LF
UT WOS:000278140000007
ER
PT J
AU Kalas, RM
Solenov, D
Timmermans, E
AF Kalas, Ryan M.
Solenov, Dmitry
Timmermans, Eddy
TI Reentrant stability of Bose-Einstein-condensate standing-wave patterns
SO PHYSICAL REVIEW A
LA English
DT Article
ID DARK SOLITONS; INSTABILITY; GENERATION; VORTICES; TRAP; GAS
AB We describe standing-wave patterns induced by an attractive finite-ranged external potential inside a large Bose-Einstein Condensate (BEC). As the potential depth increases, the time-independent Gross-Pitaevskii equation develops pairs of solutions that have nodes in their wave function. We elucidate the nature of these states and study their dynamical stability. Although we study the problem in a two-dimensional BEC subject to a cylindrically symmetric square well potential of a radius that is comparable to the coherence length of the BEC, our analysis reveals general trends that are valid in two and three dimensions, independent of the symmetry of the localized potential well, and suggestive of the behavior in general short-range and large-range potentials. One set of nodal BEC wave functions resembles the single particle n-node bound-state wave function of the potential well, the other wave functions resemble the n - 1-node bound-statewave function with a kink state pinned by the potential. The second state, though corresponding to the lower free energy value of the pair of n-node BEC states, is always unstable, whereas the first can be dynamically stable in intervals of the potential well depth, implying that the standing-wave BEC can evolve from being dynamically unstable to stable and back to unstable as the potential well is adiabatically deepened - a phenomenon that we refer to as "reentrant dynamical stability."
C1 [Kalas, Ryan M.; Solenov, Dmitry; Timmermans, Eddy] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
[Kalas, Ryan M.; Solenov, Dmitry] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Kalas, RM (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RI Solenov, Dmitry/H-6250-2012
FU Los Alamos Laboratory Directed Research and Development (LDRD)
FX This work was funded by the Los Alamos Laboratory Directed Research and
Development (LDRD) program. All authors thank Malcolm Boshier for
interesting conversations and the description of dynamical BEC
experiments that directly motivated this work. R.M.K. and E.T. thank
Fernando Cucchietti for useful discussions on the integration of the
time-independent Gross Pitaevskii equation for steep 3D potentials.
NR 24
TC 1
Z9 1
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAY
PY 2010
VL 81
IS 5
AR 053620
DI 10.1103/PhysRevA.81.053620
PG 12
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 602LF
UT WOS:000278140000150
ER
PT J
AU Shen, YZ
Carr, GL
Murphy, JB
Tsang, TY
Wang, XJ
Yang, X
AF Shen, Yuzhen
Carr, G. L.
Murphy, James B.
Tsang, Thomas Y.
Wang, Xijie
Yang, Xi
TI Electro-optic time lensing with an intense single-cycle terahertz pulse
SO PHYSICAL REVIEW A
LA English
DT Article
ID OPTICAL RECTIFICATION; GENERATION
AB We demonstrate that an intense single-cycle terahertz (THz) pulse can act as a time lens to phase modulate and compress a copropagating ultrashort laser pulse. By using the THz-induced phase modulation as a time lens and a glass plate as a group velocity dispersive element, we have compressed an unchirped similar to 165 fs laser pulse to similar to 45 fs.
C1 [Shen, Yuzhen; Carr, G. L.; Murphy, James B.; Wang, Xijie; Yang, Xi] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
[Tsang, Thomas Y.] Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA.
RP Shen, YZ (reprint author), Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
FU US Department of Energy [DE-AC02-98CH10886]
FX This work is supported by the US Department of Energy under Contract No.
DE-AC02-98CH10886. The authors would like to thank Michael Fulkerson and
Pooran Singh for technical support.
NR 20
TC 6
Z9 7
U1 0
U2 11
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAY
PY 2010
VL 81
IS 5
AR 053835
DI 10.1103/PhysRevA.81.053835
PG 4
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 602LF
UT WOS:000278140000196
ER
PT J
AU Stolterfoht, N
Cabrera-Trujillo, R
Krstic, PS
Hoekstra, R
Ohrn, Y
Deumens, E
Sabin, JR
AF Stolterfoht, N.
Cabrera-Trujillo, R.
Krstic, P. S.
Hoekstra, R.
Oehrn, Y.
Deumens, E.
Sabin, J. R.
TI Isotope effects on the charge transfer into the n=1, 2, and 3 shells of
He2+ in collisions with H, D, and T
SO PHYSICAL REVIEW A
LA English
DT Article
ID ELECTRON-CAPTURE; SOLAR-WIND; EXCITATION; IONIZATION; EXCHANGE;
EMISSION; HYDROGEN; SYSTEMS; ATOMS; IONS
AB Processes for charge transfer into He2+ colliding with the atomic isotopes hydrogen (H), deuterium (D), and tritium (T) are theoretically studied at collision energies as low as 30 eV/amu. Probabilities and cross sections for electron capture into different shells of the projectile are calculated using an ab initio approach which solves the time-dependent Schrodinger equation. The results are interpreted in terms of radial and rotational couplings between molecular orbitals. The probabilities exhibit strong Stueckelberg oscillations for charge transfer into shells with the principal quantum numbers n = 2 and 3 due to radial coupling mechanisms in specific ranges of the impact parameter. The total cross sections for charge transfer, evaluated for a given shell, differ by orders of magnitude, as different isotopes are used in the collisions. The isotope effect increases significantly for decreasing n = 3, 2, and 1. This finding is attributed to the influence of the rotational coupling mechanism, which is strongly affected by the distance of closest approach between the collision partners.
C1 [Stolterfoht, N.; Cabrera-Trujillo, R.; Oehrn, Y.; Deumens, E.; Sabin, J. R.] Univ Florida, Quantum Theory Project, Dept Phys, Gainesville, FL 32611 USA.
[Stolterfoht, N.; Cabrera-Trujillo, R.; Oehrn, Y.; Deumens, E.; Sabin, J. R.] Univ Florida, Dept Chem, Gainesville, FL 32611 USA.
[Stolterfoht, N.] Helmholtz Zentrum Berlin, D-14109 Berlin, Germany.
[Hoekstra, R.] Univ Groningen, KVI Atom Phys, NL-9747 AA Groningen, Netherlands.
[Krstic, P. S.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
[Cabrera-Trujillo, R.] Univ Nacl Autonoma Mexico, Inst Ciencias Fis, Cuernavaca 62251, Morelos, Mexico.
RP Stolterfoht, N (reprint author), Univ Florida, Quantum Theory Project, Dept Phys, Gainesville, FL 32611 USA.
EM nico@stolterfoht.com
RI Hoekstra, Ronnie/E-9279-2012; Cabrera-Trujillo, Remigio/A-9389-2011
FU PAPIIT-UNAM [107108]; CONACyT [089607]; US DOE Office of Fusion Sciences
through ORNL [DE-AC05-00OR22725]; NSF [00057476]
FX The University of Florida High Performance Computing Center is
acknowledged for providing computer resources and support. R.C.-T
acknowledges support from Grant No. PAPIIT-UNAM 107108 and the
CONACyT-SNI consolidation program under Grant No. 089607. P. K.
acknowledges support from the US DOE Office of Fusion Sciences through
ORNL, under Contract No. DE-AC05-00OR22725 with UT-Battelle, LLC. The
work was also supported by NSF Grant No. 00057476 to Y.O. and E. D.
NR 29
TC 12
Z9 12
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAY
PY 2010
VL 81
IS 5
AR 052704
DI 10.1103/PhysRevA.81.052704
PG 10
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 602LF
UT WOS:000278140000099
ER
PT J
AU Vengalattore, M
Guzman, J
Leslie, SR
Serwane, F
Stamper-Kurn, DM
AF Vengalattore, M.
Guzman, J.
Leslie, S. R.
Serwane, F.
Stamper-Kurn, D. M.
TI Periodic spin textures in a degenerate F=1 Rb-87 spinor Bose gas
SO PHYSICAL REVIEW A
LA English
DT Article
ID PHASES; STATES
AB We report on the spin textures produced by cooling unmagnetized Rb-87 F = 1 spinor gases into the regime of quantum degeneracy. At low temperatures, magnetized textures form that break translational symmetry and display short-range periodic magnetic order characterized by one- or two-dimensional spatial modulations with wavelengths much smaller than the extent of the quasi-two-dimensional degenerate gas. Spin textures produced upon cooling spin mixtures with a nonzero initial magnetic quadrupole moment also show ferromagnetic order that, at low temperature, coexists with the spatially modulated structure.
C1 [Vengalattore, M.; Guzman, J.; Leslie, S. R.; Serwane, F.; Stamper-Kurn, D. M.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Stamper-Kurn, D. M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Vengalattore, M (reprint author), Cornell Univ, Atom & Solid State Phys Lab, Ithaca, NY 14853 USA.
EM dmsk@berkeley.edu
RI Vengalattore, Mukund/B-2781-2015; Stamper-Kurn, Dan/B-5442-2015; Leslie,
Sabrina/M-3626-2016
OI Stamper-Kurn, Dan/0000-0002-4845-5835;
FU NSF; Defense Advanced Research Projects Agency Optical Lattice Emulator
program; Natural Sciences and Engineering Research Council of Canada;
Gottlieb Daimler and Karl Benz Foundation; Division of Materials
Sciences and Engineering, Office of Basic Energy Sciences
FX We thank S. M. Girvin, T. L. Ho, J. Moore, and A. Vishwanath for
valuable discussions. This work was supported by the NSF, and by a grant
from the Army Research Office with funding from the Defense Advanced
Research Projects Agency Optical Lattice Emulator program. Partial
personnel and equipment support was provided by the Division of
Materials Sciences and Engineering, Office of Basic Energy Sciences. S.
R. L. acknowledges support from the Natural Sciences and Engineering
Research Council of Canada and F. S. from the Gottlieb Daimler and Karl
Benz Foundation.
NR 27
TC 53
Z9 53
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAY
PY 2010
VL 81
IS 5
AR 053612
DI 10.1103/PhysRevA.81.053612
PG 6
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 602LF
UT WOS:000278140000142
ER
PT J
AU Wei, Q
Dalvit, DAR
Lombardo, FC
Mazzitelli, FD
Onofrio, R
AF Wei, Q.
Dalvit, D. A. R.
Lombardo, F. C.
Mazzitelli, F. D.
Onofrio, R.
TI Results from electrostatic calibrations for measuring the Casimir force
in the cylinder-plane geometry
SO PHYSICAL REVIEW A
LA English
DT Article
ID LONG-RANGE INTERACTIONS; MACROSCOPIC FORCES; SCALE-INVARIANCE;
WORK-FUNCTION; MU-M; TEMPERATURE; PLATES; RESTRICTIONS; GRAVITATION;
CONSTRAINTS
AB We report on measurements performed on an apparatus aimed to study the Casimir force in the cylinder-plane configuration. The electrostatic calibrations evidence anomalous behaviors in the dependence of the electrostatic force and the minimizing potential upon distance. We discuss analogies and differences of these anomalies with respect to those already observed in the sphere-plane configuration. At the smallest explored distances we observe frequency shifts of non-Coulombian nature preventing the measurement of the Casimir force in the same range. We also report on measurements performed in the parallel-plane configuration, showing that the dependence on distance of the minimizing potential, if present at all, is milder than in the sphere-plane or cylinder-plane geometries. General considerations on the interplay between the distance-dependent minimizing potential and the precision of Casimir force measurements in the range relevant to detect the thermal corrections for all geometries are finally reported.
C1 [Wei, Q.; Onofrio, R.] Dartmouth Coll, Dept Phys & Astron, Wilder Lab 6127, Hanover, NH 03755 USA.
[Dalvit, D. A. R.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Lombardo, F. C.; Mazzitelli, F. D.] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis JJ Giambiagi, RA-1428 Buenos Aires, DF, Argentina.
[Onofrio, R.] Univ Padua, Dipartimento Fis Galileo Galilei, I-35131 Padua, Italy.
RP Wei, Q (reprint author), Dartmouth Coll, Dept Phys & Astron, Wilder Lab 6127, Hanover, NH 03755 USA.
FU DARPA/MTO [DE-AC52-06NA25396]; UBA; CONICET; ANPCyT (Argentina)
FX The work of DARD was funded by DARPA/MTO's Casimir Effect Enhancement
program under DOE/NNSA Contract No. DE-AC52-06NA25396 and the work of
FCL and FDM was supported by UBA, CONICET, and ANPCyT (Argentina).
NR 92
TC 23
Z9 23
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9926
EI 2469-9934
J9 PHYS REV A
JI Phys. Rev. A
PD MAY
PY 2010
VL 81
IS 5
AR 052115
DI 10.1103/PhysRevA.81.052115
PG 18
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 602LF
UT WOS:000278140000032
ER
PT J
AU Yip, FL
McCurdy, CW
Rescigno, TN
AF Yip, F. L.
McCurdy, C. W.
Rescigno, T. N.
TI Hybrid orbital and numerical grid representation for electronic
continuum processes: Double photoionization of atomic beryllium
SO PHYSICAL REVIEW A
LA English
DT Article
AB A general approach for ab initio calculations of electronic continuum processes is described in which the many-electron wave function is expanded using a combination of orbitals at short range and the finite-element discrete-variable representation (FEM-DVR) at larger distances. The orbital portion of the basis allows efficient construction of many-electron configurations in which some of the electrons are bound, but because the orbitals are constructed from an underlying FEM-DVR grid, the calculation of two-electron integrals retains the efficiency of the primitive FEM-DVR approach. As an example, double photoionization of beryllium is treated in a calculation in which the 1s(2) core is frozen. This approach extends the use of exterior complex scaling (ECS), successfully applied to helium and H(2), to calculations with two active electrons on more complicated targets. Integrated, energy-differential and triply-differential cross sections are exhibited, and the results agree well with other theoretical investigations.
C1 [Yip, F. L.; McCurdy, C. W.; Rescigno, T. N.] Univ Calif Berkeley, Lawrence Berkeley Lab, Chem Sci & Ultrafast Xray Sci Lab, Berkeley, CA 94720 USA.
[McCurdy, C. W.] Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA.
[McCurdy, C. W.] Univ Calif Davis, Dept Chem, Davis, CA 95616 USA.
RP Yip, FL (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Chem Sci & Ultrafast Xray Sci Lab, Berkeley, CA 94720 USA.
FU US Department of Energy; University of California Lawrence Berkeley
National Laboratory [DE-AC02-05CH11231]; US DOE Office of Basic Energy
Sciences, Division of Chemical Sciences; National Science Foundation
[PHY0604628]
FX This work was performed under the auspices of the US Department of
Energy by the Los Alamos National Laboratory and the University of
California Lawrence Berkeley National Laboratory under Contract
DE-AC02-05CH11231 and was supported by the US DOE Office of Basic Energy
Sciences, Division of Chemical Sciences. CWM acknowledges support from
the National Science Foundation (Grant No. PHY0604628).
NR 25
TC 23
Z9 23
U1 1
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAY
PY 2010
VL 81
IS 5
AR 053407
DI 10.1103/PhysRevA.81.053407
PG 8
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 602LF
UT WOS:000278140000115
ER
PT J
AU Bauer, ED
Lee, HO
Sidorov, VA
Kurita, N
Gofryk, K
Zhu, JX
Ronning, F
Movshovich, R
Thompson, JD
Park, T
AF Bauer, E. D.
Lee, H. O.
Sidorov, V. A.
Kurita, N.
Gofryk, K.
Zhu, J. -X.
Ronning, F.
Movshovich, R.
Thompson, J. D.
Park, Tuson
TI Pressure-induced superconducting state and effective mass enhancement
near the antiferromagnetic quantum critical point of CePt2In7
SO PHYSICAL REVIEW B
LA English
DT Article
ID HEAVY-FERMION COMPOUNDS; UNCONVENTIONAL SUPERCONDUCTIVITY; ELECTRON
METALS; MAGNETISM; TEMPERATURE; CERHIN5; PUCOGA5
AB The heavy-fermion antiferromagnet CePt2In7 is a new, structurally more two-dimensional member of the CemMnIn3m+2n family. Applying pressure to CePt2In7 induces a broad dome of superconductivity that coexists with magnetic order for 1 <= P <= 3 GPa. The maximum T-c=2.1 K appears near the critical pressure P-c = 3.5 GPa where the Neel temperature extrapolates to zero temperature. An analysis of the initial slope of the upper critical field, the T-2 coefficient of the electrical resistivity, and specific heat indicates an enhancement of the effective mass m* as P-c is approached, suggesting that critical fluctuations may mediate superconductivity. Electronic-structure calculations reveal a delicate balance between structural anisotropy and f-d hybridization, which may account for comparable T-c's in CePt2In7 and more three-dimensional CeRhIn5.
C1 [Bauer, E. D.; Lee, H. O.; Sidorov, V. A.; Kurita, N.; Gofryk, K.; Zhu, J. -X.; Ronning, F.; Movshovich, R.; Thompson, J. D.; Park, Tuson] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Park, Tuson] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea.
[Sidorov, V. A.] Russian Acad Sci, Inst High Pressure Phys, Troitsk 142190, Russia.
RP Bauer, ED (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
RI Park, Tuson/A-1520-2012; Bauer, Eric/D-7212-2011; Gofryk,
Krzysztof/F-8755-2014;
OI Gofryk, Krzysztof/0000-0002-8681-6857; Ronning,
Filip/0000-0002-2679-7957; Bauer, Eric/0000-0003-0017-1937; Zhu,
Jianxin/0000-0001-7991-3918
FU U.S. Department of Energy, Office of Basic Energy Sciences, Division of
Materials Sciences and Engineering; Los Alamos Laboratory Directed
Research and Development program
FX Work at Los Alamos National Laboratory was performed under the auspices
of the U.S. Department of Energy, Office of Basic Energy Sciences,
Division of Materials Sciences and Engineering and funded in part by the
Los Alamos Laboratory Directed Research and Development program.
NR 23
TC 29
Z9 29
U1 7
U2 45
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 180507
DI 10.1103/PhysRevB.81.180507
PG 4
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800016
ER
PT J
AU Chan, MKY
Reed, J
Donadio, D
Mueller, T
Meng, YS
Galli, G
Ceder, G
AF Chan, M. K. Y.
Reed, J.
Donadio, D.
Mueller, T.
Meng, Y. S.
Galli, G.
Ceder, G.
TI Cluster expansion and optimization of thermal conductivity in SiGe
nanowires
SO PHYSICAL REVIEW B
LA English
DT Article
ID SI/SIGE SUPERLATTICE NANOWIRES; THERMOELECTRIC PERFORMANCE; SILICON
NANOWIRES; MERIT; CRYSTALS; SYSTEMS; DEVICES; ALLOYS; FIGURE
AB We investigate the parametrization and optimization of thermal conductivity in silicon-germanium alloy nanowires by the cluster-expansion technique. Si(1-x)Ge(x) nanowires are of interest for thermoelectric applications and the reduction in lattice thermal conductivity (kappa(L)) is desired for enhancing the thermoelectric figure of merit. We seek the minimization of kappa(L) with respect to arrangements of Si and Ge atoms in 1.5 nm diameter [111] Si(1-x)Ge(x) nanowires, by obtaining kappa(L) from equilibrium classical molecular-dynamics (MD) simulations via the Green-Kubo formalism, and parametrizing the results with a coarse-grained cluster expansion. Using genetic algorithm optimization with the coarse-grained cluster expansion, we are able to predict configurations that significantly decrease kappa(L) as verified by subsequent MD simulations. Our results indicate that superlattice-like configurations with planes of Ge show drastically lowered kappa(L).
C1 [Chan, M. K. Y.] MIT, Dept Phys, Cambridge, MA 02139 USA.
[Chan, M. K. Y.; Mueller, T.; Meng, Y. S.; Ceder, G.] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA.
[Reed, J.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Donadio, D.; Galli, G.] Univ Calif Davis, Dept Chem, Davis, CA 95616 USA.
[Meng, Y. S.] Univ Calif San Diego, Dept NanoEngn, La Jolla, CA 92093 USA.
RP Chan, MKY (reprint author), MIT, Dept Phys, Cambridge, MA 02139 USA.
RI Donadio, Davide/C-6971-2008; Mueller, Tim/G-3435-2011; Chan, Maria
/B-7940-2011; Meng, Shirley /I-1276-2013
OI Donadio, Davide/0000-0002-2150-4182; Chan, Maria /0000-0003-0922-1363;
FU DARPA-PROM [W911NF-06-1-0175]; DOE SciDAC [DEFC02-06ER25794]
FX The authors acknowledge funding from DARPA-PROM program under Grant No.
W911NF-06-1-0175. In addition, D. Donadio and G. Galli acknowledge
funding from DOE SciDAC under Grant No. DEFC02-06ER25794.
NR 28
TC 17
Z9 17
U1 1
U2 14
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 17
AR 174303
DI 10.1103/PhysRevB.81.174303
PG 7
WC Physics, Condensed Matter
SC Physics
GA 602LV
UT WOS:000278141600056
ER
PT J
AU Chattopadhyay, S
Uysal, A
Stripe, B
Ehrlich, S
Karapetrova, EA
Dutta, P
AF Chattopadhyay, Sudeshna
Uysal, Ahmet
Stripe, Benjamin
Ehrlich, Steven
Karapetrova, Evguenia A.
Dutta, Pulak
TI Surface order in cold liquids: X-ray reflectivity studies of dielectric
liquids and comparison to liquid metals
SO PHYSICAL REVIEW B
LA English
DT Article
ID LOW-MELTING TEMPERATURE; FISHER-WIDOM LINE; VAPOR INTERFACE; DENSITY
PROFILE; CAPILLARY WAVES; GALLIUM; MERCURY; SCATTERING; SYSTEMS; ALLOY
AB Oscillatory surface-density profiles (layers) have previously been reported in several metallic liquids, one dielectric liquid, and in computer simulations of dielectric liquids. We have now seen surface layers in two other dielectric liquids, pentaphenyl trimethyl trisiloxane, and pentavinyl pentamethyl cyclopentasiloxane. These layers appear below T similar to 285 K and T similar to 130 K, respectively; both thresholds correspond to T/T-c similar to 0.2 where T-c is the liquid-gas critical temperature. All metallic and dielectric liquid surfaces previously studied are also consistent with the existence of this T/T-c threshold, first indicated by the simulations of Chacon et al. [Phys. Rev. Lett. 87, 166101 (2001)]. The layer width parameters, determined using a distorted-crystal fitting model, follow common trends as functions of T-c for both metallic and dielectric liquids.
C1 [Chattopadhyay, Sudeshna; Uysal, Ahmet; Stripe, Benjamin; Dutta, Pulak] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
[Ehrlich, Steven] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
[Karapetrova, Evguenia A.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Chattopadhyay, S (reprint author), Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
RI Uysal, Ahmet/E-7638-2010
OI Uysal, Ahmet/0000-0003-3278-5570
FU U.S. National Science Foundation [DMR-0705137]; U.S. Department of
Energy
FX This work was supported by the U.S. National Science Foundation under
Grant No. DMR-0705137. We used the facilities of the Center for
Functional Nanomaterials (CFN), Beam Line X-18A at the National
Synchrotron Light Source (NSLS) and Sector 33-BM-C at the Advanced
Photon Source (APS), all of which are supported by the U.S. Department
of Energy.
NR 42
TC 5
Z9 5
U1 0
U2 7
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 184206
DI 10.1103/PhysRevB.81.184206
PG 8
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800041
ER
PT J
AU Corwin, AD
de Boer, MP
AF Corwin, Alex D.
de Boer, Maarten P.
TI Frictional aging, de-aging, and re-aging in a monolayer-coated
micromachined interface
SO PHYSICAL REVIEW B
LA English
DT Article
ID ROCK FRICTION; DRY-FRICTION; STICK-SLIP; CONSTITUTIVE-EQUATIONS;
DEPENDENT FRICTION; STATIC FRICTION; CREEP; MEMS; BIFURCATION; TRIBOLOGY
AB Measurements on monolayer-coated polycrystalline silicon surfaces have shown that the static friction coefficient mu(s) strongly depends on loading parameters including hold time and normal hold force by Corwin and de Boer [J. Microelectromech. Syst. 18, 250 (2009)]. In that work, mu(s) was measured by keeping the tangential force constant and lowering normal force until motion occurred. Results indicated that mu(s) also depends strongly on normal force ramp-down rate. Here, we postulate that if the normal load is lowered instantaneously, the time for the block to begin moving, the "release time" t(r), will be greater than the inertial response time, which is on the order of 5 mu(s). We measure the release time and find that it spans nearly six decades from less than 100 mu(s) to almost 50 s. Release time depends on the loading and unloading history through all three of the parameters varied: hold time, hold force, and release force. An empirical model incorporating all three of these parameters fits the release time data over the full range. Release time decreases after the contacting surfaces are held together at increasing hold force levels and this qualitatively explains a previous observation that static friction aging is suppressed with increasing normal force at a fixed tangential load in this interfacial system. We further quantitatively relate the previous mu(s) loading dependence on all three parameters to the release time model established here by introducing a "re-aging" parameter. This work firmly establishes that release time is a more fundamental parameter than the static friction coefficient and is the origin of static friction coefficient dependencies in this micromachined interface.
C1 [Corwin, Alex D.; de Boer, Maarten P.] Sandia Natl Labs, MEMS Technol Dept, Albuquerque, NM 87185 USA.
RP Corwin, AD (reprint author), Gen Elect Corp, Microsyst & Microfluid Lab, Niskayuna, NY 12309 USA.
RI de Boer, Maarten/C-1525-2013
OI de Boer, Maarten/0000-0003-1574-9324
FU United States Department of Energy [DEAC04-94AL85000]
FX The authors acknowledge the staff at the Microelectronics Laboratory for
their reliable fabrication and coating of nanotractor actuators. Sandia
is a multiprogram laboratory operated by Sandia Corporation, a
Lockheed-Martin Co., for the United States Department of Energy under
Contract No. DEAC04-94AL85000.
NR 30
TC 4
Z9 4
U1 1
U2 9
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 17
AR 174109
DI 10.1103/PhysRevB.81.174109
PG 11
WC Physics, Condensed Matter
SC Physics
GA 602LV
UT WOS:000278141600034
ER
PT J
AU Cuk, T
Zocco, DA
Eisaki, H
Struzhkin, V
Grosche, FM
Maple, MB
Shen, ZX
AF Cuk, T.
Zocco, D. A.
Eisaki, H.
Struzhkin, V.
Grosche, F. M.
Maple, M. B.
Shen, Z. -X.
TI Signatures of pressure-induced superconductivity in insulating
Bi1.98Sr2.06Y0.68CaCu2O8+delta
SO PHYSICAL REVIEW B
LA English
DT Article
ID TRANSITION-TEMPERATURE; NORMAL-STATE; YBA2CU3O7-DELTA; ENHANCEMENT;
DEPENDENCE
AB We have performed several high-pressure electrical resistance experiments on Bi1.98Sr2.06Y0.68Cu2O8+delta (Bi2212), an insulating parent compound of the high-T-c Bi2212 family of copper oxide superconductors. We find a resistive anomaly, a downturn at low temperature, that onsets with applied pressure in the 20-40 kbar range. Through both resistance and magnetoresistance measurements, we identify this anomaly as a signature of induced superconductivity. Resistance to higher pressures decreases T-c, giving a maximum of similar to 10 K. The higher pressure measurements exhibit a strong sensitivity to the hydrostaticity of the pressure environment. We make comparisons to the pressure-induced superconductivity now ubiquitous in the iron arsenides.
C1 [Cuk, T.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Zocco, D. A.; Maple, M. B.] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
[Eisaki, H.] Natl Inst Adv Ind Sci & Technol, Nanoelect Res Inst, Tsukuba 3058568, Japan.
[Struzhkin, V.] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA.
[Grosche, F. M.] Univ London, Dept Phys, Egham TW20 0EX, Surrey, England.
[Shen, Z. -X.] SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, Menlo Pk, CA 94025 USA.
[Shen, Z. -X.] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
[Shen, Z. -X.] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA.
RP Cuk, T (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RI Grosche, Malte/A-7117-2012; Struzhkin, Viktor/J-9847-2013; Zocco,
Diego/O-3440-2014
OI Grosche, Malte/0000-0002-3912-9819; Struzhkin,
Viktor/0000-0002-3468-0548;
FU DOE Office of Science, Division of Materials Science
[DE-FG03-01ER45929-A001]; NSF [DMR-0304981]; National Nuclear Security
Administration through the U.S. Department of Energy [DEFG52-06NA26205]
FX We would like to acknowledge helpful discussions with A. Kapitulnik, E.
Gregoryanz, A. Mackenzie, and M. Nunez Regueiro. T. Cuk would like to
thank the Royal Holloway, University of London for the use of facilities
and access to pressure cells. T. Cuk would also like to thank the
Carnegie Insitution of Washington for the use of facilities, and partial
support of this work. The Stanford work was supported by DOE Office of
Science, Division of Materials Science, with Contract No.
DE-FG03-01ER45929-A001 and NSF under Grant No. DMR-0304981. Research at
University of California, San Diego was supported by the National
Nuclear Security Administration under the Stewardship Science Academic
Alliance Program through the U. S. Department of Energy under Grant No.
DEFG52-06NA26205.
NR 29
TC 2
Z9 2
U1 0
U2 11
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 184509
DI 10.1103/PhysRevB.81.184509
PG 5
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800088
ER
PT J
AU Daghofer, M
Luo, QL
Yu, R
Yao, DX
Moreo, A
Dagotto, E
AF Daghofer, M.
Luo, Q-L
Yu, R.
Yao, D. X.
Moreo, A.
Dagotto, E.
TI Orbital-weight redistribution triggered by spin order in the pnictides
SO PHYSICAL REVIEW B
LA English
DT Article
ID ELECTRONIC-STRUCTURE; IRON; SUPERCONDUCTIVITY; INSTABILITY
AB The one-particle spectral function and its orbital composition are investigated in a three-orbital model for the undoped parent compounds of the iron-based superconductors. In the realistic parameter regime, where results fit experimental data best, it is observed that the magnetization in the xz and yz orbitals are markedly different and the Fermi surface presents mostly xz character, as recently observed in photoemission experiments [T. Shimojima et al., Phys. Rev. Lett. 104, 057002 (2010)]. Since the ferro-orbital order in this regime is at most a few percent, these results are mainly driven by the magnetic order. An analogous analysis for a five-orbital model leads to similar conclusions.
C1 [Daghofer, M.] IFW Dresden, D-01171 Dresden, Germany.
[Luo, Q-L; Yao, D. X.; Moreo, A.; Dagotto, E.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Luo, Q-L; Yao, D. X.; Moreo, A.; Dagotto, E.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Yu, R.] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA.
[Yao, D. X.] Sun Yat Sen Univ, Sch Phys & Engn, Guangzhou 510275, Guangdong, Peoples R China.
RP Daghofer, M (reprint author), IFW Dresden, POB 27 01 16, D-01171 Dresden, Germany.
EM m.daghofer@ifw-dresden.de
RI Daghofer, Maria/C-5762-2008; YU, RONG/C-1506-2012; Yu, Rong/K-5854-2012;
Yu, Rong/H-3355-2016
OI Daghofer, Maria/0000-0001-9434-8937;
FU NSF [DMR-0706020]; Division of Materials Science and Engineering, Office
of Basic Energy Sciences, U. S. DOE; Deutsche Forschungsgemeinschaft
(DFG)
FX This research was sponsored by the NSF under Grant No. DMR-0706020, the
Division of Materials Science and Engineering, Office of Basic Energy
Sciences, U. S. DOE (A.M. and E.D.), and by the Deutsche
Forschungsgemeinschaft (DFG) under the Emmy-Noether program. We
acknowledge valuable discussions with H. Rosner, P. M. R. Brydon, and K.
Koepernik.
NR 29
TC 45
Z9 45
U1 0
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 180514
DI 10.1103/PhysRevB.81.180514
PG 4
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800023
ER
PT J
AU Fishman, RS
Shum, WW
Miller, JS
AF Fishman, Randy S.
Shum, William W.
Miller, Joel S.
TI Pressure-induced phase transition in a molecule-based magnet with
interpenetrating sublattices
SO PHYSICAL REVIEW B
LA English
DT Article
ID LOW-SPIN TRANSITION; INDUCED VALENCE; AXIAL LIGANDS
AB The molecule-based magnet [Ru(2)(O(2)CMe)(4)](3)[Cr(CN)(6]) contains two interpenetrating sublattices with sublattice moments confined to the cubic diagonals. At ambient pressure, a field of about 850 Oe rotates the antiferromagnetically coupled sublattice moments toward the field direction, producing a wasp-waisted magnetization curve. Up to 7 kbar, the sublattice moments increase with pressure due to the enhanced exchange coupling between the Cr(III) and Ru(II/III)(2) spins on each sublattice. Above 7 kbar, the sublattice moment drops by about half and the parallel linear susceptibility of each sublattice rises dramatically. The phase transition at 7 kbar is most likely caused by a high-to-low-spin transition on each Ru(2) complex.
C1 [Fishman, Randy S.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Shum, William W.; Miller, Joel S.] Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA.
[Shum, William W.] Cornell Univ, Dept Chem, Ithaca, NY 14853 USA.
RP Fishman, RS (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RI Fishman, Randy/C-8639-2013
FU U.S. Department of Energy; U.S. National Science Foundation [0553573]
FX We would like to acknowledge helpful discussions with Satoshi Okamoto.
This research was sponsored by the Division of Materials Sciences and
Engineering of the U.S. Department of Energy (R.S.F.) and by the U.S.
National Science Foundation (Grant No. 0553573) (W.W.S. and J.S.M.).
NR 25
TC 14
Z9 14
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 17
AR 172407
DI 10.1103/PhysRevB.81.172407
PG 4
WC Physics, Condensed Matter
SC Physics
GA 602LV
UT WOS:000278141600015
ER
PT J
AU Gao, F
Chen, D
Hu, WY
Weber, WJ
AF Gao, F.
Chen, D.
Hu, Wangyu
Weber, W. J.
TI Energy dissipation and defect generation in nanocrystalline silicon
carbide
SO PHYSICAL REVIEW B
LA English
DT Article
ID ATOMIC-SCALE SIMULATION; MOLECULAR-DYNAMICS; DISPLACEMENT CASCADES;
COMPUTER-SIMULATION; SI; AMORPHIZATION; METALS
AB Large-scale molecular-dynamics simulations have been employed to study defect generation and primary damage state in nanocrystalline (NC) SiC of average grain diameters from 5 to 21 nm. Primary knock-on atom (PKA) kinetic energies of 10 keV are simulated and cascade structures in NC SiC with a grain size smaller than 12 nm are generally different from those generated in single-crystalline SiC. It is found that the local stresses near the grain boundaries (GBs) strongly affect the behavior of the PKA and secondary recoil atoms (SRAs), and the GBs act as sinks for deposition of kinetic energy. A striking feature is that the PKA and SRAs preferentially deposit energy along the GBs for grains with average size less 12 nm, which results in atomic displacements primarily within the GBs; whereas for larger grain sizes, most defects are produced within the grains. The defect production within gains generally increases with increasing grain size, which is manifested in switching from grain boundary damage to grain damage. The most common defects created in NC SiC are antisite defects, following by vacancies and interstitials, in contrast to those produced in a single-crystalline SiC, where the dominate defects are Frenkel pairs. Defect production efficiency increases with increasing grain size, with a typical value of 0.18 for small grains and rising to 0.5 for larger grains.
C1 [Gao, F.; Chen, D.; Weber, W. J.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Chen, D.; Hu, Wangyu] Hunan Univ, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China.
RP Gao, F (reprint author), Pacific NW Natl Lab, MS K8-93,POB 999, Richland, WA 99352 USA.
EM fei.gao@pnl.gov
RI Weber, William/A-4177-2008; Hu, Wangyu/B-5762-2009; Gao, Fei/H-3045-2012
OI Weber, William/0000-0002-9017-7365; Hu, Wangyu/0000-0001-7416-3994;
FU Division of Materials Sciences and Engineering, Office of Basic Energy
Sciences, U. S. Department of Energy [DE-AC05-76RL01830]; Chinese
Academy of Sciences and the National Natural Science Foundation
[50671035]
FX This research is supported by the Division of Materials Sciences and
Engineering, Office of Basic Energy Sciences, U. S. Department of Energy
under Contract No. DE-AC05-76RL01830. D. Chen and W. Y. Hu were
supported by Chinese Academy of Sciences and the National Natural
Science Foundation under Contract No. 50671035. D. C. also wishes to
acknowledge the China Scholarship Council.
NR 35
TC 18
Z9 18
U1 1
U2 23
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 184101
DI 10.1103/PhysRevB.81.184101
PG 8
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800024
ER
PT J
AU Garcia, DR
Graf, J
Jozwiak, C
Hwang, CG
Eisaki, H
Lanzara, A
AF Garcia, D. R.
Graf, J.
Jozwiak, C.
Hwang, C. G.
Eisaki, H.
Lanzara, A.
TI Crossover region between nodal and antinodal states at the Fermi level
of optimally doped and overdoped Bi2Sr1.6Nd0.4CuO6+delta
SO PHYSICAL REVIEW B
LA English
DT Article
ID HIGH-TEMPERATURE SUPERCONDUCTORS; T-C SUPERCONDUCTOR; CUPRATE
SUPERCONDUCTORS; UNDERDOPED BI2212; COOPER PAIRS; ENERGY GAPS;
PSEUDOGAP; BI2SR2CACU2O8+DELTA; ARCS; SURFACE
AB We have studied Bi2Sr1.6Nd0.4CuO6+delta using angle-resolved photoemission spectroscopy in the optimal and overdoped regions of the phase diagram. We identify a narrow crossover region in the electronic structure between nodal and antinodal regions associated with the deviation from a pure d-wave gap function, an abrupt increase in the quasiparticle lifetime, the formation of Fermi arcs above T-c, and a sudden shift of the bosonic mode energy from higher energy, similar to 60 meV, near the nodal direction, to lower energy, similar to 20 meV, near the antinodal direction. Our work underscores the importance of a unique crossover region in the momentum space near E-F for the single-layered cuprates, between nodal and antinodal points, that is independent of the anti-ferromagnetic zone boundary.
C1 [Garcia, D. R.; Lanzara, A.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Garcia, D. R.; Graf, J.; Jozwiak, C.; Hwang, C. G.; Lanzara, A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Eisaki, H.] AIST Tsukuba Cent 2, Tsukuba, Ibaraki 3058568, Japan.
RP Garcia, DR (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM alanzara@lbl.gov
FU U. S. Department of Energy [DE-AC02-05CH11231]
FX We would like to thank S. Wilson, C. Rotundu, D.-H. Lee, C. Smallwood,
and D. Siegel for helpful discussions. This work was supported by the
Director, Office of Science, Office of Basic Energy Sciences, Materials
Sciences and Engineering Division, of the U. S. Department of Energy
under Contract No. DE-AC02-05CH11231. Portions of this research were
carried out at the Stanford Synchrotron Radiation Lightsource, a
national user facility operated by Stanford University on behalf of the
U.S. Department of Energy, Office of Basic Energy Sciences.
NR 33
TC 1
Z9 1
U1 1
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 184527
DI 10.1103/PhysRevB.81.184527
PG 5
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800106
ER
PT J
AU Gofryk, K
Sefat, AS
McGuire, MA
Sales, BC
Mandrus, D
Thompson, JD
Bauer, ED
Ronning, F
AF Gofryk, K.
Sefat, A. S.
McGuire, M. A.
Sales, B. C.
Mandrus, D.
Thompson, J. D.
Bauer, E. D.
Ronning, F.
TI Doping-dependent specific heat study of the superconducting gap in
Ba(Fe(1-x)Cox)(2)As-2
SO PHYSICAL REVIEW B
LA English
DT Article
ID PAIRING SYMMETRY
AB We report a doping, magnetic field, and low-temperature-dependent study of the specific heat of the iron-arsenide Ba(Fe1-xCox)(2)As-2 at underdoped (x=0.045), optimal-doped (x=0.08) and overdoped (x=0.103 and 0.105) regimes. By subtracting the lattice specific heat the temperature and magnetic field dependence of the electronic specific heat has been studied. The temperature and field dependencies of the superconducting part of C-p exhibit similar behavior for all doping concentrations. The temperature variation in the electronic specific heat as well as its field dependence cannot be described by a single isotropic s-wave gap, pointing to a complex gap structure in the system. The lack of doping dependence indicates that the gap structure does not change significantly as a function of doping. We also observe a significant residual linear term of unknown origin in the specific heat of Ba(Fe1-xCox)(2)As-2 which suggests that inhomogeneity may be an important factor in Co-doped BaFe2As2.
C1 [Gofryk, K.; Thompson, J. D.; Bauer, E. D.; Ronning, F.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Sefat, A. S.; McGuire, M. A.; Sales, B. C.; Mandrus, D.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Gofryk, K (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM gofryk@lanl.gov; fronning@lanl.gov
RI McGuire, Michael/B-5453-2009; Bauer, Eric/D-7212-2011; Gofryk,
Krzysztof/F-8755-2014; Mandrus, David/H-3090-2014; Sefat,
Athena/R-5457-2016;
OI McGuire, Michael/0000-0003-1762-9406; Sefat, Athena/0000-0002-5596-3504;
Gofryk, Krzysztof/0000-0002-8681-6857; Ronning,
Filip/0000-0002-2679-7957; Bauer, Eric/0000-0003-0017-1937
FU Los Alamos National Laboratory; U. S. Department of Energy, Office of
Science; Los Alamos LDRD; Division of Material Sciences and Engineering
Office of Basic Energy Sciences
FX Work at Los Alamos National Laboratory was performed under the auspices
of the U. S. Department of Energy, Office of Science and supported in
part by the Los Alamos LDRD program. Research at Oak Ridge National
Laboratory is sponsored by the Division of Material Sciences and
Engineering Office of Basic Energy Sciences.
NR 47
TC 50
Z9 50
U1 1
U2 15
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 184518
DI 10.1103/PhysRevB.81.184518
PG 5
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800097
ER
PT J
AU Gordon, RT
Kim, H
Tanatar, MA
Prozorov, R
Kogan, VG
AF Gordon, R. T.
Kim, H.
Tanatar, M. A.
Prozorov, R.
Kogan, V. G.
TI London penetration depth and strong pair breaking in iron-based
superconductors
SO PHYSICAL REVIEW B
LA English
DT Article
ID STATE
AB The low-temperature variation in the London penetration depth for a number of iron-pnictide and iron-chalcogenide superconductors is nearly quadratic, Delta lambda(T) = beta T(n) with n approximate to 2. The coefficient in this dependence shows a robust scaling, beta proportional to 1/T(c)(3) across different families of these materials. We associate the scaling with a strong pair breaking. The same mechanism has recently been suggested to explain the scalings of the specific-heat jump, Delta C proportional to T(c)(3) [Bud'ko et al., Phys. Rev. B 79, 220516 (R) (2009)], and the slopes of the upper critical field, dH(c2)/dT proportional to T(c) in these materials [Kogan, Phys. Rev. B 80, 214532 (2009)]. This suggests that thermodynamic and electromagnetic properties of the iron-based superconductors can be described within a strong pair-breaking scenario (this work).
C1 [Gordon, R. T.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
RP Gordon, RT (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
RI Prozorov, Ruslan/A-2487-2008
OI Prozorov, Ruslan/0000-0002-8088-6096
FU Department of Energy-Basic Energy Sciences [DE-AC02-07CH11358]; Alfred
P. Sloan Foundation
FX We thank S. L. Bud'ko, P. C. Canfield, A. Chubukov, K. Hashimoto, C.
Martin, Y. Matsuda, K. A. Moler, H.-H. Wen, and Zh. Mao for helpful
discussions. Work at the Ames Laboratory was supported by the Department
of Energy-Basic Energy Sciences under Contract No. DE-AC02-07CH11358. R.
P. acknowledges support from the Alfred P. Sloan Foundation.
NR 28
TC 45
Z9 45
U1 0
U2 7
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 180501
DI 10.1103/PhysRevB.81.180501
PG 4
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800010
ER
PT J
AU Homes, CC
Akrap, A
Wen, JS
Xu, ZJ
Lin, ZW
Li, Q
Gu, GD
AF Homes, C. C.
Akrap, A.
Wen, J. S.
Xu, Z. J.
Lin, Z. W.
Li, Q.
Gu, G. D.
TI Electronic correlations and unusual superconducting response in the
optical properties of the iron chalcogenide FeTe0.55Se0.45
SO PHYSICAL REVIEW B
LA English
DT Article
ID T-C SUPERCONDUCTORS
AB The in-plane complex optical properties of the iron-chalcogenide superconductor FeTe0.55Se0.45 have been determined above and below the critical temperature T-c=14 K. At room temperature the conductivity is described by a weakly interacting Fermi liquid; however, below 100 K the scattering rate develops a frequency dependence in the terahertz region, signaling the increasingly correlated nature of this material. We estimate the dc conductivity sigma(dc)(T >= T-c) similar or equal to 3500 +/- 400 Omega(-1) cm(-1) and the superfluid density rho(s0) similar or equal to 9 +/- 1 x 10(6) cm(-2), which places this material close to the scaling line rho(s0)/8 similar or equal to 8.1 sigma T-dc(c) for a BCS dirty-limit superconductor. Below T-c the optical conductivity reveals two gap features at Delta(1,2)similar or equal to 2.5 and 5.1 meV.
C1 [Homes, C. C.; Akrap, A.; Wen, J. S.; Xu, Z. J.; Lin, Z. W.; Li, Q.; Gu, G. D.] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
RP Homes, CC (reprint author), Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
EM homes@bnl.gov
RI Wen, Jinsheng/F-4209-2010; xu, zhijun/A-3264-2013; Gu,
Genda/D-5410-2013; Akrap, Ana/G-1409-2013
OI Wen, Jinsheng/0000-0001-5864-1466; xu, zhijun/0000-0001-7486-2015; Gu,
Genda/0000-0002-9886-3255; Akrap, Ana/0000-0003-4493-5273
FU Office of Science, U. S. Department of Energy (DOE) [DE-AC02-98CH10886]
FX We would like to acknowledge useful discussions with D. N. Basov, J. P.
Carbotte, A. V. Chubukov, and J. M. Tranquada. This work is supported by
the Office of Science, U. S. Department of Energy (DOE) under Contract
No. DE-AC02-98CH10886.
NR 47
TC 60
Z9 60
U1 4
U2 16
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 180508
DI 10.1103/PhysRevB.81.180508
PG 4
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800017
ER
PT J
AU Kim, H
Martin, C
Gordon, RT
Tanatar, MA
Hu, J
Qian, B
Mao, ZQ
Hu, RW
Petrovic, C
Salovich, N
Giannetta, R
Prozorov, R
AF Kim, H.
Martin, C.
Gordon, R. T.
Tanatar, M. A.
Hu, J.
Qian, B.
Mao, Z. Q.
Hu, Rongwei
Petrovic, C.
Salovich, N.
Giannetta, R.
Prozorov, R.
TI London penetration depth and superfluid density of single-crystalline
Fe1+y(Te(1-x)Sex)and Fe1+y(Te(1-x)Sx)
SO PHYSICAL REVIEW B
LA English
DT Article
ID LAYERED SUPERCONDUCTOR
AB The in-plane London penetration depth, lambda(T), was measured in single crystals of the iron-chalcogenide superconductors Fe-1.03(Te0.63Se0.37) and Fe-1.06(Te0.88S0.14) by using a radio-frequency tunnel diode resonator. Similar to the iron-arsenides and in stark contrast to the iron-phosphides, iron-chalcogenides exhibit a nearly quadratic temperature variation of lambda(T) at low temperatures. The absolute value of the penetration depth in the T -> 0 limit was determined for Fe-1.03(Te0.63Se0.37) by using an Al coating technique, giving lambda(0) approximate to 560 +/- 20 nm. The superfluid density rho(s)(T)=lambda(2)(0)/lambda(2)(T) was fitted with a self-consistent two-gap gamma model. While two different gaps are needed to describe the full-range temperature variation in rho(s)(T), a nonexponential low-temperature behavior requires pair-breaking scattering, and therefore an unconventional (e.g., s(+/-) or nodal) order parameter.
C1 [Kim, H.; Martin, C.; Gordon, R. T.; Tanatar, M. A.; Prozorov, R.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Kim, H.; Martin, C.; Gordon, R. T.; Tanatar, M. A.; Prozorov, R.] Iowa State Univ, Dept Phys, Ames, IA 50011 USA.
[Hu, J.; Qian, B.; Mao, Z. Q.] Tulane Univ, Dept Phys & Engn Phys, New Orleans, LA 70118 USA.
[Hu, Rongwei; Petrovic, C.] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
[Salovich, N.; Giannetta, R.] Univ Illinois, Loomis Lab Phys, Urbana, IL 61801 USA.
RP Prozorov, R (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
EM prozorov@ameslab.gov
RI Hu, Rongwei/E-7128-2012; Prozorov, Ruslan/A-2487-2008; Hu,
Jin/C-4141-2014; Petrovic, Cedomir/A-8789-2009
OI Prozorov, Ruslan/0000-0002-8088-6096; Hu, Jin/0000-0003-0080-4239;
Petrovic, Cedomir/0000-0001-6063-1881
FU Division of Materials Science and Engineering, Basic Energy Sciences,
Department of Energy USDOE [DEAC02-07CH11358]; NSF [DMR-0645305]; USDOE
Office of Science, Basic Energy Sciences [DE-AC0298CH1088]; USDOE by
Brookhaven Science Associates [DEAC02- 98CH10886]; USDOE Office of
Science, Office of Basic Energy Services as part of The Energy Frontier
Research Center EFRC, Center for Emergent Superconductivity CES; Alfred
P. Sloan Foundation
FX We thank V. G. Kogan for helpful discussions. Work at the Ames
Laboratory was supported by the Division of Materials Science and
Engineering, Basic Energy Sciences, Department of Energy USDOE, under
Contract No. DEAC02-07CH11358. The work at Tulane was supported by the
NSF under Grant No. DMR-0645305. The work at UIUC was supported by the
Center for Emergent Superconductivity, an Energy Frontier Research
Center funded by the USDOE Office of Science, Basic Energy Sciences
under Award Number DE-AC0298CH1088. Work at the Brookhaven National
Laboratory, which is operated for the USDOE by Brookhaven Science
Associates Grant No. DEAC02- 98CH10886, was in part supported by the
USDOE Office of Science, Office of Basic Energy Services as part of The
Energy Frontier Research Center EFRC, Center for Emergent
Superconductivity CES. R.P. acknowledges support from the Alfred P.
Sloan Foundation.
NR 33
TC 53
Z9 53
U1 2
U2 25
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 180503
DI 10.1103/PhysRevB.81.180503
PG 4
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800012
ER
PT J
AU Kim, W
Jin, E
Wu, J
Park, J
Arenholz, E
Scholl, A
Hwang, C
Qiu, ZQ
AF Kim, Wondong
Jin, E.
Wu, J.
Park, J.
Arenholz, E.
Scholl, A.
Hwang, Chanyong
Qiu, Z. Q.
TI Effect of NiO spin orientation on the magnetic anisotropy of the Fe film
in epitaxially grown Fe/NiO/Ag(001) and Fe/NiO/MgO(001)
SO PHYSICAL REVIEW B
LA English
DT Article
ID ANTIFERROMAGNETIC DOMAINS; EXCHANGE BIAS; THIN-FILMS
AB Single-crystalline Fe/NiO bilayers were epitaxially grown on Ag(001) and on MgO(001), and investigated by low-energy electron-diffraction, magneto-optic Kerr effect, and x-ray magnetic linear dichroism (XMLD). We find that while the Fe film has an in-plane magnetization in both Fe/NiO/Ag(001) and Fe/NiO/MgO(001) systems, the NiO spin orientation changes from in-plane direction in Fe/NiO/Ag(001) to out-of-plane direction in Fe/NiO/MgO(001). These two different NiO spin orientations generate remarkable different effects that the NiO induced magnetic anisotropy in the Fe film is much greater in Fe/NiO/Ag(001) than in Fe/NiO/MgO(001). XMLD measurement shows that the much greater magnetic anisotropy in Fe/NiO/Ag(001) is due to a 90 coupling between the in-plane NiO spins and the in-plane Fe spins.
C1 [Kim, Wondong; Jin, E.; Wu, J.; Park, J.; Qiu, Z. Q.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Kim, Wondong; Hwang, Chanyong] Korea Res Inst Stand & Sci, Div Ind Metrol, Taejon 305340, South Korea.
[Arenholz, E.; Scholl, A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Kim, W (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RI Scholl, Andreas/K-4876-2012; Qiu, Zi Qiang/O-4421-2016
OI Qiu, Zi Qiang/0000-0003-0680-0714
FU National Science Foundation [DMR-0803305]; U.S. Department of Energy
[DE-AC02-05CH11231]; KICOS through Global Research Laboratory
FX This work was supported by National Science Foundation under Grant No.
DMR-0803305, U.S. Department of Energy under Grant No.
DE-AC02-05CH11231, and KICOS through Global Research Laboratory project.
NR 19
TC 15
Z9 15
U1 1
U2 16
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 17
AR 174416
DI 10.1103/PhysRevB.81.174416
PG 6
WC Physics, Condensed Matter
SC Physics
GA 602LV
UT WOS:000278141600074
ER
PT J
AU Kogan, VG
AF Kogan, V. G.
TI Strong pairbreaking in anisotropic superconductors
SO PHYSICAL REVIEW B
LA English
DT Article
ID IMPURITIES; CECOIN5
AB Abrikosov-Gor'kov work on pairbreaking in isotropic materials is generalized to anisotropic Fermi surfaces and order parameters. New scaling relations for states with a strong pairbreaking are found for the specific-heat jump Delta C proportional to T(c)(3); for the penetration depth that deviates from the zero-T value as Delta lambda = beta T(2) at low temperatures with beta proportional to T(c)(-3), and for the slopes of the upper critical fields H(c2)'(T(c))proportional to T(c). A remarkably simple relation between these at first sight unrelated quantities is found: Delta C beta(2)T(c)(4)/vertical bar H(c2)'vertical bar=phi(0)/16 pi(2) is a universal constant. The predictions are checked on CeCoIn(5) and the possibility to apply them to iron-based materials is discussed.
C1 [Kogan, V. G.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Kogan, V. G.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
RP Kogan, VG (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
EM kogan@ameslab.gov
FU U.S. Department of Energy, Office of Basic Energy Sciences
FX I am grateful to S. Bud'ko for the help in collecting data for the
figure. Numerous discussions with P. Canfield, J. Schmalian, R.
Prozorov, M. Tanatar, and J. Clem are appreciated. I have also benefited
from remarks of L. Gor'kov. The work was supported by the U.S.
Department of Energy, Office of Basic Energy Sciences.
NR 27
TC 19
Z9 19
U1 1
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 184528
DI 10.1103/PhysRevB.81.184528
PG 7
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800107
ER
PT J
AU Lei, HC
Hu, RW
Choi, ES
Warren, JB
Petrovic, C
AF Lei, Hechang
Hu, Rongwei
Choi, E. S.
Warren, J. B.
Petrovic, C.
TI Effects of excess Fe on upper critical field and magnetotransport in
Fe1+y(Te(1-x)Sx)z
SO PHYSICAL REVIEW B
LA English
DT Article
ID SINGLE-CRYSTALS; MAGNETIC-FIELD; DILUTE ALLOYS; SUPERCONDUCTIVITY;
STATE; SPIN; DEPENDENCE
AB We have investigated the upper critical field anisotropy and magnetotransport properties of Fe-1.14(1)Te-0.91(2)S-0.09(2) single crystals in stable magnetic fields up to 35 T. The results show that mu H-0(c2)(T) along the c axis and in the ab plane exhibit saturation at low temperatures. The anisotropy of mu H-0(c2)(T) decreases with decreasing temperature, becoming nearly isotropic for T -> 0. Our analysis indicates that the spin-paramagnetic pair breaking with spin-orbital scattering is responsible for the behavior of mu H-0(c2)(T). Furthermore, from analysis of the normal-state properties, we show evidence that the excess Fe is a key factor determining the normal- and superconducting-state physical properties.
C1 [Lei, Hechang; Hu, Rongwei; Petrovic, C.] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
[Choi, E. S.] Florida State Univ, NHMFL Phys, Tallahassee, FL 32310 USA.
[Warren, J. B.] Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA.
RP Lei, HC (reprint author), Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
RI Hu, Rongwei/E-7128-2012; Petrovic, Cedomir/A-8789-2009; LEI,
Hechang/H-3278-2016
OI Petrovic, Cedomir/0000-0001-6063-1881;
FU U.S. Department of Energy [DE-Ac02-98CH10886]
FX We thank Vladimir Dobrosavljevic, Ruslan Prozorov, and Weiguo Yin for
useful discussions and T. P. Murphy for experiment support in NHMFL.
This work was carried out at the Brookhaven National Laboratory, which
is operated for the U.S. Department of Energy by Brookhaven Science
Associates under Contract No. DE-Ac02-98CH10886. This work was in part
supported by the U.S. Department of Energy, Office of Science, Office of
Basic Energy Sciences as part of the Energy Frontier Research Center
(EFRC), Center for Emergent Superconductivity (CES). A portion of this
work was performed at the National High Magnetic Field Laboratory, which
is supported by NSF Cooperative Agreement No. DMR-0084173, by the State
of Florida, and by the U. S. Department of Energy.
NR 47
TC 25
Z9 25
U1 0
U2 12
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 184522
DI 10.1103/PhysRevB.81.184522
PG 6
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800101
ER
PT J
AU Manuel, P
Chapon, LC
Todorov, IS
Chung, DY
Castellan, JP
Rosenkranz, S
Osborn, R
Toledano, P
Kanatzidis, MG
AF Manuel, P.
Chapon, L. C.
Todorov, I. S.
Chung, D. Y.
Castellan, J. -P.
Rosenkranz, S.
Osborn, R.
Toledano, P.
Kanatzidis, M. G.
TI Incommensurate spin-density wave and magnetic lock-in transition in
CaFe4As3
SO PHYSICAL REVIEW B
LA English
DT Article
AB The magnetic structure for the recently synthesized iron-arsenide compound CaFe4As3 has been studied by neutron-powder diffraction. Long-range magnetic order is detected below 85 K, with an incommensurate modulation described by the propagation vector k=(0, delta, 0), delta similar to 0.39. Below similar to 25 K, our measurements detect a first-order phase transition where delta locks into the commensurate value 3/8. A model of the magnetic structure is proposed for both temperature regimes, based on Rietveld refinements of the powder data and symmetry considerations. The structures correspond to longitudinal spin-density waves with magnetic moments directed along the b axis. A Landau analysis captures the change in thermodynamic quantities observed at the two magnetic transitions, in particular, the drop in resistivity at the lock-in transition.
C1 [Manuel, P.; Chapon, L. C.] STFC Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
[Todorov, I. S.; Chung, D. Y.; Castellan, J. -P.; Rosenkranz, S.; Osborn, R.; Kanatzidis, M. G.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Toledano, P.] Univ Picardie, Lab Phys Complex Syst, F-80000 Amiens, France.
[Kanatzidis, M. G.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
RP Manuel, P (reprint author), STFC Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
RI Osborn, Raymond/E-8676-2011; Rosenkranz, Stephan/E-4672-2011
OI Osborn, Raymond/0000-0001-9565-3140; Rosenkranz,
Stephan/0000-0002-5659-0383
FU U.S. Department of Energy, Office of Basic Energy Sciences, Division of
Materials Sciences and Engineering [DE-AC02-06CH11357]
FX Research at Argonne National Laboratory is supported by the U.S.
Department of Energy, Office of Basic Energy Sciences, Division of
Materials Sciences and Engineering under Award No. DE-AC02-06CH11357.
NR 12
TC 16
Z9 16
U1 1
U2 7
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 184402
DI 10.1103/PhysRevB.81.184402
PG 6
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800047
ER
PT J
AU Mei, Q
Sinogeikin, S
Shen, G
Amin, S
Benmore, CJ
Ding, K
AF Mei, Q.
Sinogeikin, S.
Shen, G.
Amin, S.
Benmore, C. J.
Ding, K.
TI High-pressure x-ray diffraction measurements on vitreous GeO2 under
hydrostatic conditions
SO PHYSICAL REVIEW B
LA English
DT Article
ID NEUTRON-DIFFRACTION; GERMANIUM DIOXIDE; GLASS; SILICA; SIO2;
INTERMEDIATE; DYNAMICS
AB The x-ray structure factors of vitreous GeO2 have been measured at pressures up to 15.7 GPa in a laser-perforated diamond anvil cell under hydrostatic conditions using a monochromatic, microfocused high-energy x-ray beam. The results reveal a monotonic increase of the average coordination number of oxygen atoms around Ge with pressure from 4.2(2) at 5.1 GPa to 5.5(3) at 15.7 GPa. The coordination number change suggests that the structural transition range has been extended and pushed to higher pressure under hydrostatic conditions.
C1 [Mei, Q.; Sinogeikin, S.; Shen, G.] Carnegie Inst Washington, Geophys Lab, HPCAT, Argonne, IL 60439 USA.
[Amin, S.] Arizona State Univ, Dept Chem & Biochem, Tempe, AZ 85287 USA.
[Benmore, C. J.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Ding, K.] Xian Univ Architecture & Technol, Sch Met Engn, Xian 710055, Peoples R China.
RP Mei, Q (reprint author), Carnegie Inst Washington, Geophys Lab, HPCAT, Bldg 434E,9700 S Cass Ave, Argonne, IL 60439 USA.
EM qiang.mei@hpcat.aps.anl.gov; gshen@ciw.edu
RI Shen, Guoyin/D-6527-2011;
OI Benmore, Chris/0000-0001-7007-7749
FU National Science Foundation [EAR-0738852]; CIW; CDAC; UNLV; LLNL;
DOENNSA; DOE-BES [DE-AC02-06CH11357]; NSF
FX This work was supported by the National Science Foundation under Grant
No. EAR-0738852. Vitali Prakapenka, Qiaoshi Zeng, and Peter Lee are
thanked for the assistance during the high-energy x-ray experiments.
Malcolm Guthrie, Emmanuel Soignard, and Jeff Yarger are thanked for the
helpful discussion during data analysis. We would like to acknowledge
GSECARS and COMPRES for providing helium gas loading system. HPCAT is
supported by CIW, CDAC, UNLV, and LLNL through funding from DOENNSA,
DOE-BES, and NSF. APS is supported by DOE-BES, under Contract No.
DE-AC02-06CH11357.
NR 40
TC 27
Z9 27
U1 0
U2 13
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 17
AR 174113
DI 10.1103/PhysRevB.81.174113
PG 6
WC Physics, Condensed Matter
SC Physics
GA 602LV
UT WOS:000278141600038
ER
PT J
AU Mejia-Lopez, J
Altbir, D
Landeros, P
Escrig, J
Romero, AH
Roshchin, IV
Li, CP
Fitzsimmons, MR
Batlle, X
Schuller, IK
AF Mejia-Lopez, J.
Altbir, D.
Landeros, P.
Escrig, J.
Romero, A. H.
Roshchin, Igor V.
Li, C-P.
Fitzsimmons, M. R.
Batlle, X.
Schuller, Ivan K.
TI Development of vortex state in circular magnetic nanodots: Theory and
experiment
SO PHYSICAL REVIEW B
LA English
DT Article
ID PATTERNED MEDIA; NANOMAGNETS; FABRICATION; DYNAMICS; CORE; PERMALLOY;
BEHAVIOR; DOTS
AB We compare magnetic reversal of nanostructured circular magnetic dots of different sizes. This comparison is based on superconducting quantum interference device (SQUID) magnetometry, neutron scattering, Monte Carlo simulation, and analytical calculations and is quantified using a parameter which characterizes the variation in the hysteresis curve width. Below a critical dot diameter, the magnetic reversal occurs by coherent rotation and above that diameter, the reversal occurs by formation of a magnetic vortex. The vortex-core diameter is controlled by competing magnetic energy contributions. For 20-nm-thick Fe dots, the values of the critical diameter (58-60 nm) and the vortex core (16-19 nm) are in very good agreement between the different experimental and theoretical methods: neutron scattering, SQUID magnetometry, Monte Carlo simulations, and analytical calculations.
C1 [Mejia-Lopez, J.] Pontificia Univ Catolica Chile, Fac Fis, Santiago, Chile.
[Mejia-Lopez, J.; Altbir, D.; Escrig, J.] CEDENNA, Santiago 9170124, Chile.
[Altbir, D.; Escrig, J.] Univ Santiago Chile, Dept Fis, Santiago 9170124, Chile.
[Landeros, P.] Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso 2340000, Chile.
[Romero, A. H.] CINVESTAV, Dept Mat, Queretaro, Mexico.
[Roshchin, Igor V.] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA.
[Roshchin, Igor V.] Texas A&M Univ, Mat Sci & Engn Program, College Stn, TX 77843 USA.
[Li, C-P.; Schuller, Ivan K.] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
[Fitzsimmons, M. R.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Batlle, X.] Univ Barcelona, Dept Fis Fonamental, Barcelona 08028, Catalonia, Spain.
RP Mejia-Lopez, J (reprint author), Pontificia Univ Catolica Chile, Fac Fis, Ave Vicuna Mackenna 4860, Santiago, Chile.
RI Escrig, Juan/A-9247-2009; Landeros, Pedro/B-4603-2012; Lujan Center,
LANL/G-4896-2012; Batlle, Xavier/H-5795-2012; Roshchin,
Igor/I-5162-2012; Escrig, Juan/N-4304-2015
OI Landeros, Pedro/0000-0002-0927-1419; Escrig, Juan/0000-0002-3958-8185
FU AFOSR; FONDECYT [1050066, 1080300, 11070010, 11080246]; Millennium
Science Nucleus [P06-022-F]; Financiamiento Basal para Centros
Cientificos y Tecnologicos de Excelencia; "Bicentenario en Ciencia y
Tecnologia" PBCT [PSD-031]; Vicerrectoria Adjunta de Investigacion y
Doctorado-PUC [06/2009]; CONACyT Mexico [J-59853-F]; Texas AM
University; Spanish MICINN [MAT2009-08667]; Catalan DIUE [2009SGR856];
University of Barcelona (International Cooperation); CNS IPICYT, Mexico;
DOE
FX J.M.L., D.A., J.E., and P.L. acknowledge support from AFOSR, FONDECYT
under Grants No. 1050066, No. 1080300, No. 11070010, and No. 11080246,
the Millennium Science Nucleus "Basic and Applied Magnetism" Grant No.
P06-022-F, Financiamiento Basal para Centros Cientificos y Tecnologicos
de Excelencia, and the program "Bicentenario en Ciencia y Tecnologia"
PBCT under Project No. PSD-031. J.M.L. acknowledges support from
Vicerrectoria Adjunta de Investigacion y Doctorado-PUC under Proyecto
Limite No. 06/2009. A.H.R. acknowledges support from CONACyT Mexico
under Project No. J-59853-F. I.V.R. acknowledges support from Texas A&M
University. I.V.R. and A.H.R acknowledge support from Texas A&M
University-CONACyT Collaborative Research Grant Program. X.B.
acknowledges the financial support of the Spanish MICINN (Grant No.
MAT2009-08667), Catalan DIUE (Grant No. 2009SGR856) and University of
Barcelona (International Cooperation). We acknowledge the computer
resources from CNS IPICYT, Mexico. Research at UCSD was supported by
AFOSR and DOE.
NR 37
TC 18
Z9 19
U1 2
U2 25
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 184417
DI 10.1103/PhysRevB.81.184417
PG 8
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800062
ER
PT J
AU Micklitz, T
Norman, MR
AF Micklitz, T.
Norman, M. R.
TI Spin Hamiltonian of hyper-kagome Na4Ir3O8
SO PHYSICAL REVIEW B
LA English
DT Article
ID PHYSICS; ORBIT
AB We derive the spin Hamiltonian for the quantum spin liquid Na4Ir3O8, and then estimate the direct and superexchange contributions between near neighbor iridium ions using a tight-binding parametrization of the electronic structure. We find a magnitude of the exchange interaction comparable to experiment for a reasonable value of the on-site Coulomb repulsion. For one of the two tight-binding parametrizations we have studied, the direct exchange term, which is isotropic, dominates the total exchange. This provides support for those theories proposed to describe this quantum spin liquid that assume an isotropic Heisenberg model.
C1 [Micklitz, T.] Free Univ Berlin, Dahlem Ctr Complex Quantum Syst, D-14195 Berlin, Germany.
[Micklitz, T.] Free Univ Berlin, Inst Theoret Phys, D-14195 Berlin, Germany.
[Norman, M. R.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Micklitz, T (reprint author), Free Univ Berlin, Dahlem Ctr Complex Quantum Syst, D-14195 Berlin, Germany.
RI Norman, Michael/C-3644-2013
FU U.S. DOE, Office of Science [DE-AC02-06CH11357]
FX We thank Gang Chen and Jaejun Yu for discussions. Work at Argonne
National Laboratory was supported by the U.S. DOE, Office of Science
under Contract No. DE-AC02-06CH11357.
NR 17
TC 17
Z9 17
U1 2
U2 17
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 17
AR 174417
DI 10.1103/PhysRevB.81.174417
PG 9
WC Physics, Condensed Matter
SC Physics
GA 602LV
UT WOS:000278141600075
ER
PT J
AU Nakhmanson, SM
Korlacki, R
Johnston, JT
Ducharme, S
Ge, ZX
Takacs, JM
AF Nakhmanson, Serge M.
Korlacki, R.
Johnston, J. Travis
Ducharme, Stephen
Ge, Zhongxin
Takacs, James M.
TI Vibrational properties of ferroelectric beta-vinylidene fluoride
polymers and oligomers
SO PHYSICAL REVIEW B
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; POLY(VINYLIDENE FLUORIDE); PHASE-TRANSITION;
POLYVINYLIDENE FLUORIDE; CRYSTALLINE FORMS; FORCE-CONSTANTS;
RAMAN-SPECTRA; SCALE FACTORS; AB-INITIO; TRIFLUOROETHYLENE
AB We utilize a plane-wave density-functional theory approach to investigate the vibrational properties of the all-trans ferroelectric phase of poly(vinylidenefluoride) (beta-PVDF) showing that its stable state corresponds to the Ama2 structure with ordered dihedral tilting of the VDF monomers along the polymer chains. We then combine our theoretical analysis with IR spectroscopy to examine vibrations in oligomer crystals that are structurally related to the beta-PVDF phase. We demonstrate that these materials-which can be grown in a highly crystalline form-exhibit IR activity similar to that of beta-PVDF, making them an attractive choice for the studies of electroactive phenomena and phase transitions in polymer ferroelectrics.
C1 [Nakhmanson, Serge M.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Korlacki, R.; Johnston, J. Travis; Ducharme, Stephen] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA.
[Korlacki, R.; Johnston, J. Travis; Ducharme, Stephen; Ge, Zhongxin; Takacs, James M.] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA.
[Ge, Zhongxin; Takacs, James M.] Univ Nebraska, Dept Chem, Lincoln, NE 68588 USA.
RP Nakhmanson, SM (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM sducharme1@unl.edu
RI Korlacki, Rafal/C-2404-2008; Nakhmanson, Serge/A-6329-2014; Ducharme,
Stephen/A-1909-2009
OI Ducharme, Stephen/0000-0003-0936-7995
FU U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences [DE-AC02-06CH11357, DE-FG02-08ER46498]; University of Nebraska
Initiative
FX The authors gratefully acknowledge financial support of the Department
of Energy. S.M.N. was supported by the U.S. Department of Energy, Office
of Science, Office of Basic Energy Sciences under Contract No.
DE-AC02-06CH11357. Work at the University of Nebraska was supported by
the DOE under Grant No. DE-FG02-08ER46498 and by the Nebraska Research
Initiative. Part of the computations was completed using resources of
the Holland Computing Center at the University of Nebraska-Lincoln.
NR 65
TC 13
Z9 13
U1 2
U2 22
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 17
AR 174120
DI 10.1103/PhysRevB.81.174120
PG 8
WC Physics, Condensed Matter
SC Physics
GA 602LV
UT WOS:000278141600045
ER
PT J
AU Norman, MR
Lin, J
Millis, AJ
AF Norman, M. R.
Lin, Jie
Millis, A. J.
TI Lifshitz transition in underdoped cuprates
SO PHYSICAL REVIEW B
LA English
DT Article
ID T-C SUPERCONDUCTOR; QUANTUM CRITICAL-POINT; FERMI-SURFACE; VORTEX STATE;
TEMPERATURE; OSCILLATIONS; LA2-XSRXCUO4; POCKETS
AB Recent studies show that quantum oscillations thought to be associated with a density wave reconstructed Fermi surface disappear at a critical value of the doping for YBa(2)Cu(3)O(6+y) and the cyclotron mass diverges as the critical value is approached from the high doping side. We argue that the phenomenon is due to a Lifshitz transition where the pockets giving rise to the quantum oscillations connect to form an open (quasi-one-dimensional) Fermi surface. The estimated critical doping is close to that found by experiment and the theory predicts a logarithmic divergence of the cyclotron mass with a coefficient comparable to that observed in experiment.
C1 [Norman, M. R.; Lin, Jie] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Millis, A. J.] Columbia Univ, Dept Phys, New York, NY 10027 USA.
RP Norman, MR (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Norman, Michael/C-3644-2013
FU U.S. NSF [DMR-0705847]; U.S. DOE, Office of Science [DE-AC02-06CH11357]
FX We thank Louis Taillefer and Cyril Proust for sharing with us their
unpublished data, and Suchitra Sebastian and Neil Harrison for
discussions. A.J.M. was supported by the U.S. NSF under Grant No.
DMR-0705847, and M.R.N. and J.L. by the U.S. DOE, Office of Science,
under Contract No. DE-AC02-06CH11357.
NR 32
TC 28
Z9 28
U1 0
U2 11
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 180513
DI 10.1103/PhysRevB.81.180513
PG 4
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800022
ER
PT J
AU Prokes, K
Kreyssig, A
Ouladdiaf, B
Pratt, DK
Ni, N
Bud'ko, SL
Canfield, PC
McQueeney, RJ
Argyriou, DN
Goldman, AI
AF Prokes, K.
Kreyssig, A.
Ouladdiaf, B.
Pratt, D. K.
Ni, N.
Bud'ko, S. L.
Canfield, P. C.
McQueeney, R. J.
Argyriou, D. N.
Goldman, A. I.
TI Evidence from neutron diffraction for superconductivity in the
stabilized tetragonal phase of CaFe2As2 under uniaxial pressure
SO PHYSICAL REVIEW B
LA English
DT Article
AB CaFe2As2 single crystals under uniaxial pressure applied along the c axis exhibit the coexistence of several structural phases at low temperatures. We show that the room-temperature tetragonal phase is stabilized at low temperatures for pressures above 0.06 GPa, and its weight fraction attains a maximum in the region where superconductivity is observed under applied uniaxial pressure. Simultaneous resistivity measurements strongly suggest that this phase is responsible for the superconductivity in CaFe2As2 found below 10 K in samples subjected to nonhydrostatic pressure conditions.
C1 [Prokes, K.; Argyriou, D. N.] Helmholtz Zentrum Berlin Mat & Energy, D-14109 Berlin, Germany.
[Kreyssig, A.; Pratt, D. K.; Ni, N.; Bud'ko, S. L.; Canfield, P. C.; McQueeney, R. J.; Goldman, A. I.] Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA.
[Kreyssig, A.; Pratt, D. K.; Ni, N.; Bud'ko, S. L.; Canfield, P. C.; McQueeney, R. J.; Goldman, A. I.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Ouladdiaf, B.] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France.
RP Prokes, K (reprint author), Helmholtz Zentrum Berlin Mat & Energy, MI-1,Hahn Meitner Pl 1, D-14109 Berlin, Germany.
EM prokes@helmholtz-berlin.de
RI Prokes, Karel/J-5438-2013; Canfield, Paul/H-2698-2014; McQueeney,
Robert/A-2864-2016
OI Prokes, Karel/0000-0002-7034-1738; McQueeney, Robert/0000-0003-0718-5602
FU HZB; ILL; U.S. DOE [DEAC02-07CH11358]
FX We gratefully acknowledge the HZB and ILL for the allocated beam time
and their support for this work. The work at the Ames Laboratory was
supported by the U.S. DOE under Contract No. DEAC02-07CH11358.
NR 23
TC 30
Z9 30
U1 1
U2 9
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 180506
DI 10.1103/PhysRevB.81.180506
PG 4
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800015
ER
PT J
AU Saldin, DK
Poon, HC
Shneerson, VL
Howells, M
Chapman, HN
Kirian, RA
Schmidt, KE
Spence, JCH
AF Saldin, D. K.
Poon, H. C.
Shneerson, V. L.
Howells, M.
Chapman, H. N.
Kirian, R. A.
Schmidt, K. E.
Spence, J. C. H.
TI Beyond small-angle x-ray scattering: Exploiting angular correlations
SO PHYSICAL REVIEW B
LA English
DT Article
ID INITIO STRUCTURE SOLUTION; PARTICLE-SCATTERING
AB We propose a method for determining the projected electron density of an individual molecule from diffraction patterns of many such simultaneously illuminated molecules, randomly oriented about an axis parallel to an incident x-ray beam. We illustrate the idea with a simulation of a structure determination of a K-channel membrane protein in situ.
C1 [Saldin, D. K.; Poon, H. C.; Shneerson, V. L.] Univ Wisconsin, Dept Phys, Milwaukee, WI 53211 USA.
[Howells, M.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Chapman, H. N.] Univ Hamburg, DESY, Ctr Free Electron Laser Sci, D-22607 Hamburg, Germany.
[Kirian, R. A.; Schmidt, K. E.; Spence, J. C. H.] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA.
RP Saldin, DK (reprint author), Univ Wisconsin, Dept Phys, Milwaukee, WI 53211 USA.
RI Chapman, Henry/G-2153-2010; Kirian, Richard/M-3750-2013;
OI Chapman, Henry/0000-0002-4655-1743; Kirian, Richard/0000-0001-7197-3086
FU DOE [DESC0002141, DE-FG02-06ER46277]; Research Growth Initiative of the
University of Wisconsin-Milwaukee
FX We thank Marius Schmidt for help with generating an atomic model of the
K- channel membrane protein and Vali Raicu for helpful discussions.
D.K.S. and J.C.H. S. jointly acknowledge support from DOE under Grant
No. DESC0002141, D.K.S. from DOE Grant No. DE-FG02-06ER46277 and the
Research Growth Initiative of the University of Wisconsin-Milwaukee.
NR 22
TC 32
Z9 32
U1 1
U2 18
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 17
AR 174105
DI 10.1103/PhysRevB.81.174105
PG 6
WC Physics, Condensed Matter
SC Physics
GA 602LV
UT WOS:000278141600030
ER
PT J
AU Singh, NK
Paudyal, D
Mudryk, Y
Pecharsky, VK
Gschneidner, KA
AF Singh, Niraj K.
Paudyal, D.
Mudryk, Ya.
Pecharsky, V. K.
Gschneidner, K. A., Jr.
TI Magnetostructural properties of Ho-5(Si0.8Ge0.2)(4)
SO PHYSICAL REVIEW B
LA English
DT Article
ID MAGNETIC-FIELDS; BEHAVIOR; INTERMETALLICS; GD-5(SI2GE2); TEMPERATURE;
TRANSITION; ALLOYS; PHASE; THERMODYNAMICS; TRANSPORT
AB The magnetostructural properties of Ho-5(Si0.8Ge0.2)(4) have been investigated both experimentally and by using first-principles theory. The compound orders ferromagnetically at 50 K, and in the temperature range of 50-100 K it exhibits a Griffiths phaselike behavior. The dc magnetization, heat capacity, and the relaxation and frequency dependence of the ac susceptibility indicate that the long-range magnetic order and a spin-glasslike state may coexist in Ho-5(Si0.8Ge0.2)(4) over a certain temperature range below T-C. Despite adopting the Gd5Si2Ge2-type monoclinic (M-type) structure at room temperature, the compound does not exhibit a magnetostructural transition at TC, unlike some other members of the R-5(Si1-xGex)(4) series with R=Gd, Tb, and Dy. The tight-binding linear muffin-tin orbital calculations within the local spin-density approximation show that in R-5(Si1-xGex)4 compounds the gain in the exchange energy brought about by the M-type to Gd5Si4-type orthorhombic (O-I) transformation decreases as R is changed from Gd to other heavy lanthanides and the absence of the M to O-I phase transformation in Ho-5(Si0.8Ge0.2)(4) is a result of low gain in the magnetic contribution to the total energy.
C1 [Singh, Niraj K.; Paudyal, D.; Mudryk, Ya.; Pecharsky, V. K.; Gschneidner, K. A., Jr.] Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA.
[Pecharsky, V. K.; Gschneidner, K. A., Jr.] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
RP Pecharsky, VK (reprint author), Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA.
EM vitkp@ameslab.gov
FU U.S. Department of Energy, Office of Science, Materials Sciences
Division [DE-AC02-07CH11358]
FX The Ames Laboratory is operated for the U.S. Department of Energy by
Iowa State University of Science and Technology. This work was supported
by the U.S. Department of Energy, Office of Science, Materials Sciences
Division under Contract No. DE-AC02-07CH11358.
NR 77
TC 11
Z9 11
U1 1
U2 7
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 184414
DI 10.1103/PhysRevB.81.184414
PG 11
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800059
ER
PT J
AU Stojilovic, N
Koncz, A
Kohlman, LW
Hu, RW
Petrovic, C
Dordevic, SV
AF Stojilovic, N.
Koncz, A.
Kohlman, L. W.
Hu, Rongwei
Petrovic, C.
Dordevic, S. V.
TI Normal state charge dynamics of Fe1.06Te0.88S0.14 superconductor probed
with infrared spectroscopy
SO PHYSICAL REVIEW B
LA English
DT Article
ID ELECTRODYNAMICS
AB We have used optical spectroscopy to probe the normal state electrodynamic response of Fe1.06Te0.88S0.14, a member of the 11 family of iron-based superconductors with T-c=8 K. Measurements have been conducted over a wide frequency range (50-50 000 cm(-1)) at selected temperatures between 10 and 300 K. At low temperatures the material behaves as an "incoherent metal:" a Drude-type peak is absent from the optical conductivity and all optical functions reveal that quasiparticles are not well defined down to the lowest measured temperature. We introduce " generalized spectral weight" analysis and use it to track temperature induced redistribution of spectral weight. Our results, combined with previous reports, indicate that the 11 family of iron-based superconductors might be different from other families.
C1 [Stojilovic, N.] Univ Wisconsin, Dept Phys & Astron, Oshkosh, WI 54901 USA.
[Koncz, A.; Kohlman, L. W.; Dordevic, S. V.] Univ Akron, Dept Phys, Akron, OH 44325 USA.
[Hu, Rongwei; Petrovic, C.] Brookhaven Natl Lab, Condensed Matter Phys, Upton, NY 11973 USA.
[Hu, Rongwei; Petrovic, C.] Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA.
RP Stojilovic, N (reprint author), Univ Wisconsin, Dept Phys & Astron, Oshkosh, WI 54901 USA.
EM dsasa@uakron.edu
RI Hu, Rongwei/E-7128-2012; Petrovic, Cedomir/A-8789-2009
OI Petrovic, Cedomir/0000-0001-6063-1881
FU U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences as part of the Energy Frontier Research Center (EFRC); Center
for Emergent Superconductivity (CES)
FX We thank D.N. Basov and C.C. Homes for critical reading of the
manuscript. Special thanks to R.D. Ramsier for the use of his equipment.
This work was in part supported by the U.S. Department of Energy, Office
of Science, Office of Basic Energy Sciences as part of the Energy
Frontier Research Center (EFRC) Center for Emergent Superconductivity
(CES)
NR 30
TC 11
Z9 11
U1 1
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 17
AR 174518
DI 10.1103/PhysRevB.81.174518
PG 5
WC Physics, Condensed Matter
SC Physics
GA 602LV
UT WOS:000278141600108
ER
PT J
AU Su, JJ
MacDonald, AH
AF Su, Jung-Jung
MacDonald, Allan H.
TI Critical tunneling currents in quantum Hall superfluids:
Pseudospin-transfer torque theory
SO PHYSICAL REVIEW B
LA English
DT Article
ID SPIN-TRANSFER; PHASE-TRANSITIONS; MAGNETIC METALS; SYSTEMS;
FERROMAGNETS; TRANSPORT; BILAYERS
AB At total filling factor nu = 1 quantum Hall bilayers can have an ordered ground state with spontaneous interlayer phase coherence. The ordered state is signaled experimentally by dramatically enhanced interlayer tunnel conductances at low-bias voltages; at larger bias voltages interlayer currents are similar to those of the disordered state. We associate this change in behavior with the existence of a critical current beyond which static interlayer phase differences cannot be maintained, and examine the dependence of this critical current on sample geometry, phase stiffness, and the coherent tunneling energy density. Our analysis is based in part on analogies between coherent bilayer behavior and spin-transfer torque physics in metallic ferromagnets. Comparison with recent experiments suggests that disorder can dramatically suppress critical currents.
C1 [Su, Jung-Jung; MacDonald, Allan H.] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA.
[Su, Jung-Jung] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Su, JJ (reprint author), Univ Texas Austin, Dept Phys, Austin, TX 78712 USA.
NR 47
TC 21
Z9 21
U1 0
U2 3
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 184523
DI 10.1103/PhysRevB.81.184523
PG 11
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800102
ER
PT J
AU Tanatar, MA
Blomberg, EC
Kreyssig, A
Kim, MG
Ni, N
Thaler, A
Bud'ko, SL
Canfield, PC
Goldman, AI
Mazin, II
Prozorov, R
AF Tanatar, M. A.
Blomberg, E. C.
Kreyssig, A.
Kim, M. G.
Ni, N.
Thaler, A.
Bud'ko, S. L.
Canfield, P. C.
Goldman, A. I.
Mazin, I. I.
Prozorov, R.
TI Uniaxial-strain mechanical detwinning of CaFe2As2 and BaFe2As2 crystals:
Optical and transport study
SO PHYSICAL REVIEW B
LA English
DT Article
ID YBA2CU3O7-DELTA; FERROPNICTIDES; SUPERCONDUCTOR; STATE
AB The parent compounds of iron-arsenide superconductors, AFe(2)As(2) (A = Ca, Sr, Ba), undergo a tetragonal to orthorhombic structural transition at a temperature T-TO in the range 135-205 K depending on the alkaline-earth element. Below T-TO the free standing crystals split into equally populated structural domains, which mask intrinsic, in-plane, anisotropic properties of the materials. Here we demonstrate a way of mechanically detwinning CaFe2As2 and BaFe2As2. The detwinning is nearly complete, as demonstrated by polarized light imaging and synchrotron x-ray measurements, and reversible, with twin pattern restored after strain release. Electrical resistivity measurements in the twinned and detwinned states show that resistivity, rho, decreases along the orthorhombic a(o) axis but increases along the orthorhombic b(o) axis in both compounds. Immediately below T-TO the ratio rho(bo)/rho(ao) = 1.2 and 1.5 for Ca and Ba compounds, respectively. Contrary to CaFe2As2, BaFe2As2 reveals an anisotropy in the nominally tetragonal phase, suggesting that either fluctuations play a larger role above T-TO in BaFe2As2 than in CaFe2As2 or that there is a higher temperature crossover or phase transition.
C1 [Tanatar, M. A.; Blomberg, E. C.; Kreyssig, A.; Kim, M. G.; Ni, N.; Thaler, A.; Bud'ko, S. L.; Canfield, P. C.; Goldman, A. I.; Prozorov, R.] Ames Lab, Ames, IA 50011 USA.
[Blomberg, E. C.; Kim, M. G.; Ni, N.; Thaler, A.; Bud'ko, S. L.; Canfield, P. C.; Goldman, A. I.; Prozorov, R.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Mazin, I. I.] USN, Res Lab, Washington, DC 20375 USA.
RP Tanatar, MA (reprint author), Ames Lab, Ames, IA 50011 USA.
EM tanatar@ameslab.gov; prozorov@ameslab.gov
RI Kim, Min Gyu/B-8637-2012; Prozorov, Ruslan/A-2487-2008; Mazin,
Igor/B-6576-2008; Canfield, Paul/H-2698-2014; Thaler,
Alexander/J-5741-2014
OI Kim, Min Gyu/0000-0001-7676-454X; Prozorov, Ruslan/0000-0002-8088-6096;
Thaler, Alexander/0000-0001-5066-8904
FU U.S. Department of Energy, Office of Science [DE-AC02-06CH11357]; U.S.
Department of Energy, Office of Basic Energy Sciences, Division of
Materials Sciences and Engineering [DE-AC02-07CH11358]; Alfred P. Sloan
Foundation
FX We thank D. Robinson for the excellent support of the high-energy x-ray
scattering study and L. Podervyansky for help in writing the manuscript.
Use of the Advanced Photon Source was supported by the U. S. Department
of Energy, Office of Science, under Contract No. DE-AC02-06CH11357. Work
at the Ames Laboratory was supported by the U. S. Department of Energy,
Office of Basic Energy Sciences, Division of Materials Sciences and
Engineering under Contract No. DE-AC02-07CH11358. R. P. acknowledges
support from Alfred P. Sloan Foundation.
NR 48
TC 163
Z9 163
U1 6
U2 52
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 184508
DI 10.1103/PhysRevB.81.184508
PG 10
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800087
ER
PT J
AU Wang, F
Zhai, H
Lee, DH
AF Wang, Fa
Zhai, Hui
Lee, Dung-Hai
TI Nodes in the gap function of LaFePO, the gap function of the Fe(Se,Te)
systems, and the STM signature of the s(+/-) pairing
SO PHYSICAL REVIEW B
LA English
DT Article
ID QUASI-PARTICLE INTERFERENCE; T-C SUPERCONDUCTIVITY;
ELECTRONIC-STRUCTURE; FERMI-SURFACE; BI2SR2CACU2O8+DELTA; COHERENCE
AB We reiterate, in more details, our previous proposal of using quasiparticle interference to determine the pairing form factor in iron-based superconductors. We also present our functional renormalization group (FRG) results on LaFePO and Fe(Se,Te) superconductors. In particular, we found that the leading pairing channel in LaFePO is nodal s(+/-) with nodes on electron Fermi surfaces. For Fe(Se,Te) system we found fully gapped s(+/-) pairing with substantial gap anisotropy on electron Fermi surfaces and large gap is concentrated in regions with dominant xy orbital character. We further fit the form factor obtained by FRG to real-space orbital basis pairing picture, which shows more clearly the differences between different iron-based superconductors.
C1 [Wang, Fa] MIT, Dept Phys, Cambridge, MA 02139 USA.
[Zhai, Hui] Tsinghua Univ, Inst Adv Study, Beijing 100084, Peoples R China.
[Lee, Dung-Hai] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Lee, Dung-Hai] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Wang, F (reprint author), MIT, Dept Phys, Cambridge, MA 02139 USA.
RI Zhai, Hui/H-9496-2012; Wang, Fa/D-3817-2015
OI Zhai, Hui/0000-0001-8118-6027; Wang, Fa/0000-0002-6220-5349
FU Basic Research Young Scholars Program of Tsinghua University, NSFC
[10944002, 1f0847002]; DOE [DE-AC02-05CH11231]
FX We thank Ryotaro Arita, Fengjie Ma, and Zhong-Yi Lu for sharing the
tight-binding fits of their band-structure calculations. H.Z. is
supported by the Basic Research Young Scholars Program of Tsinghua
University, NSFC under Grants No. 10944002 and No. 1f0847002. D. H. L.
is supported by DOE under Grant No. DE-AC02-05CH11231.
NR 55
TC 68
Z9 68
U1 0
U2 20
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 184512
DI 10.1103/PhysRevB.81.184512
PG 7
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800091
ER
PT J
AU Wang, MY
Luo, HQ
Zhao, J
Zhang, CL
Wang, M
Marty, K
Chi, SX
Lynn, JW
Schneidewind, A
Li, SL
Dai, PC
AF Wang, Miaoyin
Luo, Huiqian
Zhao, Jun
Zhang, Chenglin
Wang, Meng
Marty, Karol
Chi, Songxue
Lynn, Jeffrey W.
Schneidewind, Astrid
Li, Shiliang
Dai, Pengcheng
TI Electron-doping evolution of the low-energy spin excitations in the iron
arsenide superconductor BaFe2-xNixAs2
SO PHYSICAL REVIEW B
LA English
DT Article
ID NEUTRON-SCATTERING; PAIRING SYMMETRY
AB We use elastic and inelastic neutron scattering to systematically investigate the evolution of the low-energy spin excitations of the iron arsenide superconductor BaFe2-xNixAs2 as a function of nickel doping x. In the undoped state, BaFe2As2 exhibits a tetragonal-to-orthorhombic structural phase transition and simultaneously develops a collinear antiferromagnetic (AF) order below T-N=143 K. Upon electron doping of x=0.075 to induce bulk superconductivity with T-c=12.2 K, the AF ordering temperature reduces to T-N approximate to 58 K. We show that the appearance of bulk superconductivity in BaFe1.925Ni0.075As2 coincides with a dispersive neutron spin resonance in the spin excitation spectra and a reduction in the static ordered moment. For optimally doped BaFe1.9Ni0.1As2 (T-c=20 K) and overdoped BaFe(1.85)Ni(0.15)As2 (T-c=14 K) superconductors, the static AF long-range order is completely suppressed and the spin excitation spectra are dominated by a resonance and spin gap at lower energies. We determine the electron-doping dependence of the neutron spin resonance and spin gap energies and demonstrate that the three-dimensional nature of the resonance survives into the overdoped regime. If spin excitations are important for superconductivity, these results would suggest that the three-dimensional characters of the electronic superconducting gaps are prevalent throughout the phase diagram and may be critical for superconductivity in these materials.
C1 [Wang, Miaoyin; Zhao, Jun; Zhang, Chenglin; Wang, Meng; Dai, Pengcheng] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Luo, Huiqian; Wang, Meng; Li, Shiliang; Dai, Pengcheng] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
[Marty, Karol; Dai, Pengcheng] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
[Chi, Songxue; Lynn, Jeffrey W.] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Schneidewind, Astrid] Helmholtz Zentrum Berlin Mat & Energie, Gemeinsame Forsch Grp HZB, D-14109 Berlin, Germany.
[Schneidewind, Astrid] Tech Univ Munich, Forsch Neutronenquelle Heinz Maier Leibnitz FRM 2, D-85747 Garching, Germany.
RP Wang, MY (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
EM slli@aphy.iphy.ac.cn; daip@ornl.gov
RI Zhao, Jun/A-2492-2010; Li, Shiliang/B-9379-2009; Chi,
Songxue/A-6713-2013; Wang, Miaoyin/C-9224-2012; Dai, Pengcheng
/C-9171-2012; WANG, MENG/E-6595-2012
OI Zhao, Jun/0000-0002-0421-8934; Chi, Songxue/0000-0002-3851-9153; Dai,
Pengcheng /0000-0002-6088-3170; WANG, MENG/0000-0002-8232-2331
FU U.S. NSF [DMR-0756568]; U.S. DOE, Division of Scientific User
Facilities; U.S. DOE BES [DE-FG02-05ER46202]; Chinese Academy of
Sciences and 973 Program [2010CB833102]
FX We thank Jiangping Hu and Tao Xiang for helpful discussions. The neutron
scattering part of this work at UT/ORNL is supported by the U.S. NSF
under Grant No. DMR-0756568 and by the U.S. DOE, Division of Scientific
User Facilities. The single-crystal growth effort at UT is supported by
U.S. DOE BES under Grant No. DE-FG02-05ER46202. The single-crystal
growth and neutron-scattering work at IOP is supported by Chinese
Academy of Sciences and 973 Program (Grant No. 2010CB833102)
NR 46
TC 58
Z9 58
U1 1
U2 22
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 17
AR 174524
DI 10.1103/PhysRevB.81.174524
PG 10
WC Physics, Condensed Matter
SC Physics
GA 602LV
UT WOS:000278141600114
ER
PT J
AU Zhao, J
Regnault, LP
Zhang, CL
Wang, MY
Li, ZC
Zhou, F
Zhao, ZX
Fang, C
Hu, JP
Dai, PC
AF Zhao, Jun
Regnault, Louis-Pierre
Zhang, Chenglin
Wang, Miaoying
Li, Zhengcai
Zhou, Fang
Zhao, Zhongxian
Fang, Chen
Hu, Jiangping
Dai, Pengcheng
TI Neutron spin resonance as a probe of the superconducting energy gap of
BaFe1.9Ni0.1As2 superconductors
SO PHYSICAL REVIEW B
LA English
DT Article
ID PAIRING SYMMETRY; BA0.6K0.4FE2AS2
AB We use inelastic neutron scattering to show that for the optimally electron-doped BaFe1.9Ni0.1As2 (T-c = 20 K) iron arsenide superconductor, application of a magnetic field that partially suppresses the superconductivity and superconducting gap energy also reduces the intensity and energy of the resonance. These results demonstrate that the energy of the resonance is intimately connected to the electron pairing energy, and thus indicate that the mode is a direct probe for measuring electron pairing and superconductivity in iron arsenides.
C1 [Zhao, Jun; Zhang, Chenglin; Wang, Miaoying; Dai, Pengcheng] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Regnault, Louis-Pierre] CEA Grenoble, SPSMS MDN, Inst Nanosci & Cryogenie, F-38054 Grenoble 9, France.
[Li, Zhengcai; Zhou, Fang; Zhao, Zhongxian; Dai, Pengcheng] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
[Fang, Chen; Hu, Jiangping] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA.
[Dai, Pengcheng] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
RP Zhao, J (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
EM daip@ornl.gov
RI Zhao, Jun/A-2492-2010; Wang, Miaoyin/C-9224-2012; Dai, Pengcheng
/C-9171-2012; hu, jiangping /C-3320-2014
OI Zhao, Jun/0000-0002-0421-8934; Dai, Pengcheng /0000-0002-6088-3170;
FU U.S. NSF [DMR-0756568]; DOE Division of Scientific User Facilities;
Chinese Academy of Sciences
FX The neutron scattering work is supported by the U.S. NSF under Grant No.
DMR-0756568 and in part by DOE Division of Scientific User Facilities.
The work at IOP is supported by the Chinese Academy of Sciences.
NR 30
TC 31
Z9 31
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 1
PY 2010
VL 81
IS 18
AR 180505
DI 10.1103/PhysRevB.81.180505
PG 4
WC Physics, Condensed Matter
SC Physics
GA 602LX
UT WOS:000278141800014
ER
PT J
AU Abelev, BI
Aggarwal, MM
Ahammed, Z
Alakhverdyants, AV
Anderson, BD
Arkhipkin, D
Averichev, GS
Balewski, J
Barannikova, O
Barnby, LS
Baumgart, S
Beavis, DR
Bellwied, R
Benedosso, F
Betancourt, MJ
Betts, RR
Bhasin, A
Bhati, AK
Bichsel, H
Bielcik, J
Bielcikova, J
Biritz, B
Bland, LC
Bnzarov, I
Bonner, BE
Bouchet, J
Braidot, E
Brandin, AV
Bridgeman, A
Bruna, E
Bueltmann, S
Burton, TP
Cai, XZ
Caines, H
Sanchez, MCD
Catu, O
Cebra, D
Cendejas, R
Cervantes, MC
Chajecki, Z
Chaloupka, P
Chattopadhyay, S
Chen, HF
Chen, JH
Chen, JY
Cheng, J
Cherney, M
Chikanian, A
Choi, KE
Christie, W
Chung, P
Clarke, RF
Codrington, MJM
Corliss, R
Cormier, TM
Cosentino, MR
Cramer, JG
Crawford, HJ
Das, D
Dash, S
Daugherity, M
De Silva, LC
Dedovich, TG
DePhillips, M
Derevschikov, AA
de Souza, RD
Didenko, L
Djawotho, P
Dzhordzhadze, V
Dogra, SM
Dong, X
Drachenberg, JL
Draper, JE
Dunlop, JC
Mazumdar, MRD
Efimov, LG
Elhalhuli, E
Elnimr, M
Engelage, J
Eppley, G
Erazmus, B
Estienne, M
Eun, L
Fachini, P
Fatemi, R
Fedorisin, J
Feng, A
Filip, P
Finch, E
Fine, V
Fisyak, Y
Gagliardi, CA
Gangadharan, DR
Ganti, MS
Garcia-Solis, EJ
Geromitsos, A
Geurts, F
Ghazikhanian, V
Ghosh, P
Gorbunov, YN
Gordon, A
Grebenyuk, O
Grosnick, D
Grube, B
Guertin, SM
Guimaraes, KSFF
Gupta, A
Gupta, N
Guryn, W
Haag, B
Hallman, TJ
Hamed, A
Harris, JW
Heinz, M
Heppelmann, S
Hirsch, A
Hjort, E
Hoffman, AM
Hoffmann, GW
Hofman, DJ
Hollis, RS
Huang, HZ
Humanic, TJ
Huo, L
Igo, G
Iordanova, A
Jacobs, P
Jacobs, WW
Jakl, P
Jena, C
Jin, F
Jones, CL
Jones, PG
Joseph, J
Judd, EG
Kabana, S
Kajimoto, K
Kang, K
Kapitan, J
Kauder, K
Keane, D
Kechechyan, A
Kettler, D
Khodyrev, VY
Kikola, DP
Kiryluk, J
Kisiel, A
Klein, SR
Knospe, AG
Kocoloski, A
Koetke, DD
Konzer, J
Kopytine, M
Koralt, I
Korsch, W
Kotchenda, L
Kouchpil, V
Kravtsov, P
Kravtsov, VI
Krueger, K
Krus, M
Kumar, L
Kurnadi, P
Lamont, MAC
Landgraf, JM
LaPointe, S
Lauret, J
Lebedev, A
Lednicky, R
Lee, CH
Lee, JH
Leight, W
LeVine, MJ
Li, C
Li, N
Li, Y
Lin, G
Lindenbaum, SJ
Lisa, MA
Liu, F
Liu, H
Liu, J
Liu, L
Ljubicic, T
Llope, WJ
Longacre, RS
Love, WA
Lu, Y
Ludlam, T
Ma, GL
Ma, YG
Mahapatra, DP
Majka, R
Mall, OI
Mangotra, LK
Manweiler, R
Margetis, S
Markert, C
Masui, H
Matis, HS
Matulenko, YA
McDonald, D
McShane, TS
Meschanin, A
Milner, R
Minaev, NG
Mioduszewski, S
Mischke, A
Mohanty, B
Morozov, DA
Munhoz, MG
Nandi, BK
Nattrass, C
Nayak, TK
Nelson, JM
Netrakanti, PK
Ng, MJ
Nogach, LV
Nurushev, SB
Odyniec, G
Ogawa, A
Okada, H
Okorokov, V
Olson, D
Pachr, M
Page, BS
Pal, SK
Pandit, Y
Panebratsev, Y
Pawlak, T
Peitzmann, T
Perevoztchikov, V
Perkins, C
Peryt, W
Phatak, SC
Pile, P
Planinic, M
Ploskon, MA
Pluta, J
Plyku, D
Poljak, N
Poskanzer, AM
Potukuchi, BVKS
Prindle, D
Pruneau, C
Pruthi, NK
Pujahari, PR
Putschke, J
Raniwala, R
Raniwala, S
Ray, RL
Redwine, R
Reed, R
Ridiger, A
Ritter, HG
Roberts, JB
Rogachevskiy, OV
Romero, JL
Rose, A
Roy, C
Ruan, L
Russcher, MJ
Sahoo, R
Sakai, S
Sakrejda, I
Sakuma, T
Salur, S
Sandweiss, J
Schambach, J
Scharenberg, RP
Schmitz, N
Seele, J
Seger, J
Selyuzhenkov, I
Semertzidis, Y
Seyboth, P
Shahaliev, E
Shao, M
Sharma, M
Shi, SS
Shi, XH
Sichtermann, EP
Simon, F
Singaraju, RN
Skoby, MJ
Smirnov, N
Sorensen, P
Sowinski, J
Spinka, HM
Srivastava, B
Stanislaus, TDS
Staszak, D
Strikhanov, M
Stringfellow, B
Suaide, AAP
Suarez, MC
Subba, NL
Sumbera, M
Sun, XM
Sun, Y
Sun, Z
Surrow, B
Symons, TJM
de Toledo, AS
Takahashi, J
Tang, AH
Tang, Z
Tarini, LH
Tarnowsky, T
Thein, D
Thomas, JH
Tian, J
Timmins, AR
Timoshenko, S
Tlusty, D
Tokarev, M
Tram, VN
Trentalange, S
Tribble, RE
Tsai, OD
Ulery, J
Ullrich, T
Underwood, DG
Van Buren, G
Van Nieuwenhuizen, G
Vanfossen, JA
Varma, R
Vasconcelos, GMS
Vasiliev, AN
Videbaek, F
Viyogi, YP
Vokal, S
Voloshin, SA
Wada, M
Walker, M
Wang, F
Wang, G
Wang, H
Wang, JS
Wang, Q
Wang, X
Wang, XL
Wang, Y
Webb, G
Webb, JC
Westfall, GD
Whitten, C
Wieman, H
Wissink, SW
Witt, R
Wu, Y
Xie, W
Xu, N
Xu, QH
Xu, Y
Xu, Z
Yang, Y
Yepes, P
Yip, K
Yoo, IK
Yue, Q
Zawisza, M
Zbroszczyk, H
Zhan, W
Zhang, S
Zhang, WM
Zhang, XP
Zhang, Y
Zhang, ZP
Zhao, Y
Zhong, C
Zhou, J
Zhu, X
Zoulkarneev, R
Zoulkarneeva, Y
Zuo, JX
AF Abelev, B. I.
Aggarwal, M. M.
Ahammed, Z.
Alakhverdyants, A. V.
Anderson, B. D.
Arkhipkin, D.
Averichev, G. S.
Balewski, J.
Barannikova, O.
Barnby, L. S.
Baumgart, S.
Beavis, D. R.
Bellwied, R.
Benedosso, F.
Betancourt, M. J.
Betts, R. R.
Bhasin, A.
Bhati, A. K.
Bichsel, H.
Bielcik, J.
Bielcikova, J.
Biritz, B.
Bland, L. C.
Bnzarov, I.
Bonner, B. E.
Bouchet, J.
Braidot, E.
Brandin, A. V.
Bridgeman, A.
Bruna, E.
Bueltmann, S.
Burton, T. P.
Cai, X. Z.
Caines, H.
Sanchez, M. Calderon de la Barca
Catu, O.
Cebra, D.
Cendejas, R.
Cervantes, M. C.
Chajecki, Z.
Chaloupka, P.
Chattopadhyay, S.
Chen, H. F.
Chen, J. H.
Chen, J. Y.
Cheng, J.
Cherney, M.
Chikanian, A.
Choi, K. E.
Christie, W.
Chung, P.
Clarke, R. F.
Codrington, M. J. M.
Corliss, R.
Cormier, T. M.
Cosentino, M. R.
Cramer, J. G.
Crawford, H. J.
Das, D.
Dash, S.
Daugherity, M.
De Silva, L. C.
Dedovich, T. G.
DePhillips, M.
Derevschikov, A. A.
de Souza, R. Derradi
Didenko, L.
Djawotho, P.
Dzhordzhadze, V.
Dogra, S. M.
Dong, X.
Drachenberg, J. L.
Draper, J. E.
Dunlop, J. C.
Mazumdar, M. R. Dutta
Efimov, L. G.
Elhalhuli, E.
Elnimr, M.
Engelage, J.
Eppley, G.
Erazmus, B.
Estienne, M.
Eun, L.
Fachini, P.
Fatemi, R.
Fedorisin, J.
Feng, A.
Filip, P.
Finch, E.
Fine, V.
Fisyak, Y.
Gagliardi, C. A.
Gangadharan, D. R.
Ganti, M. S.
Garcia-Solis, E. J.
Geromitsos, A.
Geurts, F.
Ghazikhanian, V.
Ghosh, P.
Gorbunov, Y. N.
Gordon, A.
Grebenyuk, O.
Grosnick, D.
Grube, B.
Guertin, S. M.
Guimaraes, K. S. F. F.
Gupta, A.
Gupta, N.
Guryn, W.
Haag, B.
Hallman, T. J.
Hamed, A.
Harris, J. W.
Heinz, M.
Heppelmann, S.
Hirsch, A.
Hjort, E.
Hoffman, A. M.
Hoffmann, G. W.
Hofman, D. J.
Hollis, R. S.
Huang, H. Z.
Humanic, T. J.
Huo, L.
Igo, G.
Iordanova, A.
Jacobs, P.
Jacobs, W. W.
Jakl, P.
Jena, C.
Jin, F.
Jones, C. L.
Jones, P. G.
Joseph, J.
Judd, E. G.
Kabana, S.
Kajimoto, K.
Kang, K.
Kapitan, J.
Kauder, K.
Keane, D.
Kechechyan, A.
Kettler, D.
Khodyrev, V. Yu.
Kikola, D. P.
Kiryluk, J.
Kisiel, A.
Klein, S. R.
Knospe, A. G.
Kocoloski, A.
Koetke, D. D.
Konzer, J.
Kopytine, M.
Koralt, I.
Korsch, W.
Kotchenda, L.
Kouchpil, V.
Kravtsov, P.
Kravtsov, V. I.
Krueger, K.
Krus, M.
Kumar, L.
Kurnadi, P.
Lamont, M. A. C.
Landgraf, J. M.
LaPointe, S.
Lauret, J.
Lebedev, A.
Lednicky, R.
Lee, C-H.
Lee, J. H.
Leight, W.
LeVine, M. J.
Li, C.
Li, N.
Li, Y.
Lin, G.
Lindenbaum, S. J.
Lisa, M. A.
Liu, F.
Liu, H.
Liu, J.
Liu, L.
Ljubicic, T.
Llope, W. J.
Longacre, R. S.
Love, W. A.
Lu, Y.
Ludlam, T.
Ma, G. L.
Ma, Y. G.
Mahapatra, D. P.
Majka, R.
Mall, O. I.
Mangotra, L. K.
Manweiler, R.
Margetis, S.
Markert, C.
Masui, H.
Matis, H. S.
Matulenko, Yu. A.
McDonald, D.
McShane, T. S.
Meschanin, A.
Milner, R.
Minaev, N. G.
Mioduszewski, S.
Mischke, A.
Mohanty, B.
Morozov, D. A.
Munhoz, M. G.
Nandi, B. K.
Nattrass, C.
Nayak, T. K.
Nelson, J. M.
Netrakanti, P. K.
Ng, M. J.
Nogach, L. V.
Nurushev, S. B.
Odyniec, G.
Ogawa, A.
Okada, H.
Okorokov, V.
Olson, D.
Pachr, M.
Page, B. S.
Pal, S. K.
Pandit, Y.
Panebratsev, Y.
Pawlak, T.
Peitzmann, T.
Perevoztchikov, V.
Perkins, C.
Peryt, W.
Phatak, S. C.
Pile, P.
Planinic, M.
Ploskon, M. A.
Pluta, J.
Plyku, D.
Poljak, N.
Poskanzer, A. M.
Potukuchi, B. V. K. S.
Prindle, D.
Pruneau, C.
Pruthi, N. K.
Pujahari, P. R.
Putschke, J.
Raniwala, R.
Raniwala, S.
Ray, R. L.
Redwine, R.
Reed, R.
Ridiger, A.
Ritter, H. G.
Roberts, J. B.
Rogachevskiy, O. V.
Romero, J. L.
Rose, A.
Roy, C.
Ruan, L.
Russcher, M. J.
Sahoo, R.
Sakai, S.
Sakrejda, I.
Sakuma, T.
Salur, S.
Sandweiss, J.
Schambach, J.
Scharenberg, R. P.
Schmitz, N.
Seele, J.
Seger, J.
Selyuzhenkov, I.
Semertzidis, Y.
Seyboth, P.
Shahaliev, E.
Shao, M.
Sharma, M.
Shi, S. S.
Shi, X-H.
Sichtermann, E. P.
Simon, F.
Singaraju, R. N.
Skoby, M. J.
Smirnov, N.
Sorensen, P.
Sowinski, J.
Spinka, H. M.
Srivastava, B.
Stanislaus, T. D. S.
Staszak, D.
Strikhanov, M.
Stringfellow, B.
Suaide, A. A. P.
Suarez, M. C.
Subba, N. L.
Sumbera, M.
Sun, X. M.
Sun, Y.
Sun, Z.
Surrow, B.
Symons, T. J. M.
de Toledo, A. Szanto
Takahashi, J.
Tang, A. H.
Tang, Z.
Tarini, L. H.
Tarnowsky, T.
Thein, D.
Thomas, J. H.
Tian, J.
Timmins, A. R.
Timoshenko, S.
Tlusty, D.
Tokarev, M.
Tram, V. N.
Trentalange, S.
Tribble, R. E.
Tsai, O. D.
Ulery, J.
Ullrich, T.
Underwood, D. G.
Van Buren, G.
Van Nieuwenhuizen, G.
Vanfossen, J. A., Jr.
Varma, R.
Vasconcelos, G. M. S.
Vasiliev, A. N.
Videbaek, F.
Viyogi, Y. P.
Vokal, S.
Voloshin, S. A.
Wada, M.
Walker, M.
Wang, F.
Wang, G.
Wang, H.
Wang, J. S.
Wang, Q.
Wang, X.
Wang, X. L.
Wang, Y.
Webb, G.
Webb, J. C.
Westfall, G. D.
Whitten, C., Jr.
Wieman, H.
Wissink, S. W.
Witt, R.
Wu, Y.
Xie, W.
Xu, N.
Xu, Q. H.
Xu, Y.
Xu, Z.
Yang, Y.
Yepes, P.
Yip, K.
Yoo, I-K.
Yue, Q.
Zawisza, M.
Zbroszczyk, H.
Zhan, W.
Zhang, S.
Zhang, W. M.
Zhang, X. P.
Zhang, Y.
Zhang, Z. P.
Zhao, Y.
Zhong, C.
Zhou, J.
Zhu, X.
Zoulkarneev, R.
Zoulkarneeva, Y.
Zuo, J. X.
CA STAR Collaboration
TI Observation of charge-dependent azimuthal correlations and possible
local strong parity violation in heavy-ion collisions
SO PHYSICAL REVIEW C
LA English
DT Article
ID RELATIVISTIC NUCLEAR COLLISIONS; TIME PROJECTION CHAMBER; QUARK-GLUON
PLASMA; ELLIPTIC FLOW; HOT QCD; STAR; COLLABORATION; PERSPECTIVE;
MATTER; VACUUM
AB Parity (P)-odd domains, corresponding to nontrivial topological solutions of the QCD vacuum, might be created during relativistic heavy-ion collisions. These domains are predicted to lead to charge separation of quarks along the orbital momentum of the system created in noncentral collisions. To study this effect, we investigate a three-particle mixed-harmonics azimuthal correlator which is a P-even observable, but directly sensitive to the charge-separation effect. We report measurements of this observable using the STAR detector in Au + Au and Cu + Cu collisions at root s(NN) = 200 and 62 GeV. The results are presented as a function of collision centrality, particle separation in rapidity, and particle transverse momentum. A signal consistent with several of the theoretical expectations is detected in all four data sets. We compare our results to the predictions of existing event generators and discuss in detail possible contributions from other effects that are not related to P violation.
C1 [Abelev, B. I.; Barannikova, O.; Betts, R. R.; Garcia-Solis, E. J.; Hofman, D. J.; Hollis, R. S.; Iordanova, A.; Kauder, K.; Suarez, M. C.] Univ Illinois, Chicago, IL 60607 USA.
[Bridgeman, A.; Krueger, K.; Spinka, H. M.; Underwood, D. G.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Barnby, L. S.; Burton, T. P.; Elhalhuli, E.; Jones, P. G.; Nelson, J. M.] Univ Birmingham, Birmingham, W Midlands, England.
[Arkhipkin, D.; Beavis, D. R.; Bland, L. C.; Christie, W.; DePhillips, M.; Didenko, L.; Dzhordzhadze, V.; Dunlop, J. C.; Fachini, P.; Fine, V.; Fisyak, Y.; Gordon, A.; Guryn, W.; Hallman, T. J.; Lamont, M. A. C.; Landgraf, J. M.; Lauret, J.; Lebedev, A.; Lee, J. H.; LeVine, M. J.; Ljubicic, T.; Longacre, R. S.; Love, W. A.; Ludlam, T.; Ogawa, A.; Okada, H.; Perevoztchikov, V.; Pile, P.; Ruan, L.; Semertzidis, Y.; Sorensen, P.; Tang, A. H.; Ullrich, T.; Van Buren, G.; Videbaek, F.; Xu, Z.; Yip, K.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Crawford, H. J.; Engelage, J.; Judd, E. G.; Ng, M. J.; Perkins, C.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Sanchez, M. Calderon de la Barca; Cebra, D.; Das, D.; Draper, J. E.; Haag, B.; Liu, H.; Mall, O. I.; Reed, R.; Romero, J. L.] Univ Calif Davis, Davis, CA 95616 USA.
[Biritz, B.; Cendejas, R.; Gangadharan, D. R.; Ghazikhanian, V.; Guertin, S. M.; Huang, H. Z.; Igo, G.; Kurnadi, P.; Sakai, S.; Staszak, D.; Trentalange, S.; Tsai, O. D.; Wang, G.; Whitten, C., Jr.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
[de Souza, R. Derradi; Takahashi, J.; Vasconcelos, G. M. S.] Univ Estadual Campinas, Sao Paulo, Brazil.
[Cherney, M.; Gorbunov, Y. N.; McShane, T. S.; Seger, J.] Creighton Univ, Omaha, NE 68178 USA.
[Bielcik, J.; Krus, M.; Pachr, M.] Czech Tech Univ, FNSPE, CZ-11519 Prague, Czech Republic.
[Bielcikova, J.; Chaloupka, P.; Chung, P.; Jakl, P.; Kapitan, J.; Kouchpil, V.; Sumbera, M.; Tlusty, D.] Acad Sci Czech Republic, Inst Nucl Phys, CZ-25068 Rez, Czech Republic.
[Dash, S.; Jena, C.; Mahapatra, D. P.; Phatak, S. C.] Inst Phys, Bhubaneswar 751005, Orissa, India.
[Nandi, B. K.; Pujahari, P. R.; Varma, R.] Indian Inst Technol, Bombay 400076, Maharashtra, India.
[Jacobs, W. W.; Page, B. S.; Selyuzhenkov, I.; Sowinski, J.; Wissink, S. W.] Indiana Univ, Bloomington, IN 47408 USA.
[Bhasin, A.; Dogra, S. M.; Gupta, A.; Gupta, N.; Mangotra, L. K.; Potukuchi, B. V. K. S.] Univ Jammu, Jammu 180001, India.
[Alakhverdyants, A. V.; Averichev, G. S.; Bnzarov, I.; Dedovich, T. G.; Efimov, L. G.; Fedorisin, J.; Filip, P.; Kechechyan, A.; Lednicky, R.; Panebratsev, Y.; Rogachevskiy, O. V.; Shahaliev, E.; Tokarev, M.; Vokal, S.; Zoulkarneev, R.; Zoulkarneeva, Y.] Joint Inst Nucl Res, RU-141980 Dubna, Russia.
[Anderson, B. D.; Bouchet, J.; Chen, J. H.; Joseph, J.; Keane, D.; Kopytine, M.; Margetis, S.; Pandit, Y.; Subba, N. L.; Vanfossen, J. A., Jr.; Zhang, W. M.] Kent State Univ, Kent, OH 44242 USA.
[Fatemi, R.; Korsch, W.; Webb, G.] Univ Kentucky, Lexington, KY 40506 USA.
[Sun, Z.; Wang, J. S.; Yang, Y.; Zhan, W.] Inst Modern Phys, Lanzhou, Peoples R China.
[Dong, X.; Grebenyuk, O.; Hjort, E.; Jacobs, P.; Kikola, D. P.; Kiryluk, J.; Klein, S. R.; Masui, H.; Matis, H. S.; Odyniec, G.; Olson, D.; Ploskon, M. A.; Poskanzer, A. M.; Ritter, H. G.; Rose, A.; Sakrejda, I.; Salur, S.; Sichtermann, E. P.; Sun, X. M.; Symons, T. J. M.; Thomas, J. H.; Tram, V. N.; Wieman, H.; Xu, N.; Zhang, X. P.; Zhang, Y.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Balewski, J.; Betancourt, M. J.; Corliss, R.; Hoffman, A. M.; Jones, C. L.; Kocoloski, A.; Leight, W.; Milner, R.; Redwine, R.; Sakuma, T.; Seele, J.; Surrow, B.; Van Nieuwenhuizen, G.; Walker, M.] MIT, Cambridge, MA 02139 USA.
[Schmitz, N.; Seyboth, P.; Simon, F.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
[Tarnowsky, T.; Wang, H.; Westfall, G. D.] Michigan State Univ, E Lansing, MI 48824 USA.
[Brandin, A. V.; Kotchenda, L.; Kravtsov, P.; Okorokov, V.; Ridiger, A.; Strikhanov, M.; Timoshenko, S.] Moscow Engn Phys Inst, Moscow 115409, Russia.
[Lindenbaum, S. J.] CUNY City Coll, New York, NY 10031 USA.
[Benedosso, F.; Braidot, E.; Mischke, A.; Peitzmann, T.; Russcher, M. J.] NIKHEF, Amsterdam, Netherlands.
[Benedosso, F.; Braidot, E.; Mischke, A.; Peitzmann, T.; Russcher, M. J.] Univ Utrecht, Amsterdam, Netherlands.
[Chajecki, Z.; Humanic, T. J.; Lisa, M. A.] Ohio State Univ, Columbus, OH 43210 USA.
[Bueltmann, S.; Koralt, I.; Plyku, D.] Old Dominion Univ, Norfolk, VA 23529 USA.
[Aggarwal, M. M.; Bhati, A. K.; Kumar, L.; Pruthi, N. K.] Panjab Univ, Chandigarh 160014, India.
[Eun, L.; Heppelmann, S.] Penn State Univ, University Pk, PA 16802 USA.
[Derevschikov, A. A.; Khodyrev, V. Yu.; Kravtsov, V. I.; Matulenko, Yu. A.; Meschanin, A.; Minaev, N. G.; Morozov, D. A.; Nogach, L. V.; Nurushev, S. B.; Vasiliev, A. N.] Inst High Energy Phys, Protvino, Russia.
[Hirsch, A.; Konzer, J.; Netrakanti, P. K.; Scharenberg, R. P.; Skoby, M. J.; Srivastava, B.; Stringfellow, B.; Ulery, J.; Wang, F.; Wang, Q.; Xie, W.] Purdue Univ, W Lafayette, IN 47907 USA.
[Choi, K. E.; Grube, B.; Lee, C-H.; Yoo, I-K.] Pusan Natl Univ, Pusan 609735, South Korea.
[Raniwala, R.; Raniwala, S.] Univ Rajasthan, Jaipur 302004, Rajasthan, India.
[Bonner, B. E.; Eppley, G.; Geurts, F.; Liu, J.; Llope, W. J.; McDonald, D.; Roberts, J. B.; Yepes, P.; Zhou, J.] Rice Univ, Houston, TX 77251 USA.
[Cosentino, M. R.; Guimaraes, K. S. F. F.; Munhoz, M. G.; Suaide, A. A. P.; de Toledo, A. Szanto] Univ Sao Paulo, Sao Paulo, Brazil.
[Chen, H. F.; Li, C.; Lu, Y.; Shao, M.; Sun, Y.; Tang, Z.; Wang, X. L.; Xu, Y.; Zhang, Z. P.; Zhao, Y.] Univ Sci & Technol China, Hefei 230026, Peoples R China.
[Xu, Q. H.] Shandong Univ, Jinan 250100, Shandong, Peoples R China.
[Cai, X. Z.; Jin, F.; Ma, G. L.; Ma, Y. G.; Shi, X-H.; Tian, J.; Zhang, S.; Zhong, C.; Zuo, J. X.] Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
[Erazmus, B.; Estienne, M.; Geromitsos, A.; Kabana, S.; Roy, C.; Sahoo, R.] SUBATECH, Nantes, France.
[Cervantes, M. C.; Clarke, R. F.; Codrington, M. J. M.; Djawotho, P.; Drachenberg, J. L.; Gagliardi, C. A.; Hamed, A.; Huo, L.; Mioduszewski, S.; Tribble, R. E.] Texas A&M Univ, College Stn, TX 77843 USA.
[Daugherity, M.; Hoffmann, G. W.; Kajimoto, K.; Markert, C.; Ray, R. L.; Schambach, J.; Thein, D.; Wada, M.] Univ Texas Austin, Austin, TX 78712 USA.
[Cheng, J.; Kang, K.; Li, Y.; Wang, X.; Wang, Y.; Yue, Q.; Zhu, X.] Tsinghua Univ, Beijing 100084, Peoples R China.
[Witt, R.] USN Acad, Annapolis, MD 21402 USA.
[Grosnick, D.; Koetke, D. D.; Manweiler, R.; Stanislaus, T. D. S.; Webb, J. C.] Valparaiso Univ, Valparaiso, IN 46383 USA.
[Ahammed, Z.; Chattopadhyay, S.; Mazumdar, M. R. Dutta; Ganti, M. S.; Ghosh, P.; Mohanty, B.; Nayak, T. K.; Pal, S. K.; Singaraju, R. N.; Viyogi, Y. P.] Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Kolkata 700064, India.
[Kisiel, A.; Pawlak, T.; Peryt, W.; Pluta, J.; Zawisza, M.; Zbroszczyk, H.] Warsaw Univ Technol, Warsaw, Poland.
[Bichsel, H.; Cramer, J. G.; Kettler, D.; Prindle, D.] Univ Washington, Seattle, WA 98195 USA.
[Bellwied, R.; Cormier, T. M.; De Silva, L. C.; Elnimr, M.; LaPointe, S.; Pruneau, C.; Sharma, M.; Tarini, L. H.; Timmins, A. R.; Voloshin, S. A.] Wayne State Univ, Detroit, MI 48201 USA.
[Chen, J. Y.; Feng, A.; Li, N.; Liu, F.; Liu, L.; Shi, S. S.; Wu, Y.] CCNU HZNU, Inst Particle Phys, Wuhan 430079, Peoples R China.
[Baumgart, S.; Bruna, E.; Caines, H.; Catu, O.; Chikanian, A.; Finch, E.; Harris, J. W.; Heinz, M.; Knospe, A. G.; Lin, G.; Majka, R.; Nattrass, C.; Putschke, J.; Sandweiss, J.; Smirnov, N.] Yale Univ, New Haven, CT 06520 USA.
[Planinic, M.; Poljak, N.] Univ Zagreb, HR-10002 Zagreb, Croatia.
RP Abelev, BI (reprint author), Univ Illinois, Chicago, IL 60607 USA.
RI Cosentino, Mauro/L-2418-2014; Sumbera, Michal/O-7497-2014; Strikhanov,
Mikhail/P-7393-2014; Dogra, Sunil /B-5330-2013; Fornazier Guimaraes,
Karin Silvia/H-4587-2016; Chaloupka, Petr/E-5965-2012; Nattrass,
Christine/J-6752-2016; Derradi de Souza, Rafael/M-4791-2013; Suaide,
Alexandre/L-6239-2016; Inst. of Physics, Gleb Wataghin/A-9780-2017;
Okorokov, Vitaly/C-4800-2017; Ma, Yu-Gang/M-8122-2013; Mischke,
Andre/D-3614-2011; Takahashi, Jun/B-2946-2012; Planinic,
Mirko/E-8085-2012; Yoo, In-Kwon/J-6222-2012; Peitzmann,
Thomas/K-2206-2012; Witt, Richard/H-3560-2012; Yip, Kin/D-6860-2013;
Voloshin, Sergei/I-4122-2013; Pandit, Yadav/I-2170-2013; Lednicky,
Richard/K-4164-2013; Semertzidis, Yannis K./N-1002-2013; Barnby,
Lee/G-2135-2010; Yang, Yanyun/B-9485-2014; Bielcikova, Jana/G-9342-2014
OI Fisyak, Yuri/0000-0002-3151-8377; Mohanty,
Bedangadas/0000-0001-9610-2914; Bhasin, Anju/0000-0002-3687-8179;
Sorensen, Paul/0000-0001-5056-9391; Thomas, James/0000-0002-6256-4536;
Cosentino, Mauro/0000-0002-7880-8611; Sumbera,
Michal/0000-0002-0639-7323; Strikhanov, Mikhail/0000-0003-2586-0405;
Fornazier Guimaraes, Karin Silvia/0000-0003-0578-9533; Nattrass,
Christine/0000-0002-8768-6468; Derradi de Souza,
Rafael/0000-0002-2084-7001; Suaide, Alexandre/0000-0003-2847-6556;
Okorokov, Vitaly/0000-0002-7162-5345; Ma, Yu-Gang/0000-0002-0233-9900;
Takahashi, Jun/0000-0002-4091-1779; Peitzmann,
Thomas/0000-0002-7116-899X; Yip, Kin/0000-0002-8576-4311; Pandit,
Yadav/0000-0003-2809-7943; Barnby, Lee/0000-0001-7357-9904; Yang,
Yanyun/0000-0002-5982-1706;
FU RHIC Operations Group and RCF at BNL; NERSC Center at LBNL; US DOE
Office of Science; US NSF; Sloan Foundation; DFG
FX We thank D. Kharzeev for discussions on the local strong-P-violation
phenomenon and its experimental signatures. We thank the RHIC Operations
Group and RCF at BNL and the NERSC Center at LBNL and the resources
provided by the Open Science Grid consortium for their support. This
work was supported in part by the Offices of NP and HEP within the US
DOE Office of Science, the US NSF, the Sloan Foundation, and the DFG
cluster of excellence "Origin and Structure of the Universe";
CNRS/IN2P3, RA, RPL, and EMN of France; STFC and EPSRC of the United
Kingdom; FAPESP of Brazil; the Russian Ministry of Science and
Technology; the NNSFC, CAS, MoST, and MoE of China; IRP and GA of the
Czech Republic; FOM of the Netherlands; DAE, DST, and CSIR of the
Government of India; the Polish State Committee for Scientific Research;
and the Korea Science & Engineering Foundation.
NR 53
TC 145
Z9 146
U1 2
U2 29
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
EI 1089-490X
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 054908
DI 10.1103/PhysRevC.81.054908
PG 15
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800051
ER
PT J
AU Abelev, BI
Aggarwal, MM
Ahammed, Z
Alakhverdyants, AV
Anderson, BD
Arkhipkin, D
Averichev, GS
Balewski, J
Barnby, LS
Baumgart, S
Beavis, DR
Bellwied, R
Benedosso, F
Betancourt, MJ
Betts, RR
Bhasin, A
Bhati, AK
Bichsel, H
Bielcik, J
Bielcikova, J
Biritz, B
Bland, LC
Bonner, BE
Bouchet, J
Braidot, E
Brandin, AV
Bridgeman, A
Bruna, E
Bueltmann, S
Bunzarov, I
Burton, TP
Cai, XZ
Caines, H
Sanchez, MCD
Catu, O
Cebra, D
Cendejas, R
Cervantes, MC
Chajecki, Z
Chaloupka, P
Chattopadhyay, S
Chen, HF
Chen, JH
Chen, JY
Cheng, J
Cherney, M
Chikanian, A
Choi, KE
Christie, W
Chung, P
Clarke, RF
Codrington, MJM
Corliss, R
Cramer, JG
Crawford, HJ
Das, D
Dash, S
Leyva, AD
De Silva, LC
Debbe, RR
Dedovich, TG
DePhillips, M
Derevschikov, AA
de Souza, RD
Didenko, L
Djawotho, P
Dogra, SM
Dong, X
Drachenberg, JL
Draper, JE
Dunlop, JC
Mazumdar, MRD
Efimov, LG
Elhalhuli, E
Elnimr, M
Engelage, J
Eppley, G
Erazmus, B
Estienne, M
Eun, L
Evdokimov, O
Fachini, P
Fatemi, R
Fedorisin, J
Fersch, RG
Filip, P
Finch, E
Fine, V
Fisyak, Y
Gagliardi, CA
Gangadharan, DR
Ganti, MS
Garcia-Solis, EJ
Geromitsos, A
Geurts, F
Ghazikhanian, V
Ghosh, P
Gorbunov, YN
Gordon, A
Grebenyuk, O
Grosnick, D
Grube, B
Guertin, SM
Gupta, A
Gupta, N
Guryn, W
Haag, B
Hallman, TJ
Hamed, A
Han, LX
Harris, JW
Hays-Wehle, JP
Heinz, M
Heppelmann, S
Hirsch, A
Hjort, E
Hoffman, AM
Hoffmann, GW
Hofman, DJ
Hollis, RS
Huang, HZ
Humanic, TJ
Huo, L
Igo, G
Iordanova, A
Jacobs, P
Jacobs, WW
Jakl, P
Jena, C
Jin, F
Jones, CL
Jones, PG
Joseph, J
Judd, EG
Kabana, S
Kajimoto, K
Kang, K
Kapitan, J
Kauder, K
Keane, D
Kechechyan, A
Kettler, D
Kikola, DP
Kiryluk, J
Kisiel, A
Klein, SR
Knospe, AG
Kocoloski, A
Koetke, DD
Kollegger, T
Konzer, J
Kopytine, M
Koralt, I
Korsch, W
Kotchenda, L
Kouchpil, V
Kravtsov, P
Krueger, K
Krus, M
Kumar, L
Kurnadi, P
Lamont, MAC
Landgraf, JM
LaPointe, S
Lauret, J
Lebedev, A
Lednicky, R
Lee, CH
Lee, JH
Leight, W
LeVine, MJ
Li, C
Li, L
Li, N
Li, W
Li, X
Li, X
Li, Y
Li, Z
Lin, G
Lindenbaum, SJ
Lisa, MA
Liu, F
Liu, H
Liu, J
Ljubicic, T
Llope, WJ
Longacre, RS
Love, WA
Lu, Y
Ma, GL
Ma, YG
Mahapatra, DP
Majka, R
Mall, OI
Mangotra, LK
Manweiler, R
Margetis, S
Markert, C
Masui, H
Matis, HS
Matulenko, YA
McDonald, D
McShane, TS
Meschanin, A
Milner, R
Minaev, NG
Mioduszewski, S
Mischke, A
Mitrovski, MK
Mohanty, B
Mondal, MM
Morozov, DA
Munhoz, MG
Nandi, BK
Nattrass, C
Nayak, TK
Nelson, JM
Netrakanti, PK
Ng, MJ
Nogach, LV
Nurushev, SB
Odyniec, G
Ogawa, A
Okada, H
Okorokov, V
Olson, D
Pachr, M
Page, BS
Pal, SK
Pandit, Y
Panebratsev, Y
Pawlak, T
Peitzmann, T
Perevoztchikov, V
Perkins, C
Peryt, W
Phatak, SC
Pile, P
Planinic, M
Ploskon, MA
Pluta, J
Plyku, D
Poljak, N
Poskanzer, AM
Potukuchi, BVKS
Powell, CB
Prindle, D
Pruneau, C
Pruthi, NK
Pujahari, PR
Putschke, J
Raniwala, R
Raniwala, S
Ray, RL
Redwine, R
Reed, R
Rehberg, JM
Ritter, HG
Roberts, JB
Rogachevskiy, OV
Romero, JL
Rose, A
Roy, C
Ruan, L
Russcher, MJ
Sahoo, R
Sakai, S
Sakrejda, I
Sakuma, T
Salur, S
Sandweiss, J
Sangaline, E
Schambach, J
Scharenberg, RP
Schmitz, N
Schuster, TR
Seele, J
Seger, J
Selyuzhenkov, I
Seyboth, P
Shahaliev, E
Shao, M
Sharma, M
Shi, SS
Sichtermann, EP
Simon, F
Singaraju, RN
Skoby, MJ
Smirnov, N
Sorensen, P
Sowinski, J
Spinka, HM
Srivastava, B
Stanislaus, TDS
Staszak, D
Stevens, JR
Stock, R
Strikhanov, M
Stringfellow, B
Suaide, AAP
Suarez, MC
Subba, NL
Sumbera, M
Sun, XM
Sun, Y
Sun, Z
Surrow, B
Symons, TJM
de Toledo, AS
Takahashi, J
Tang, AH
Tang, Z
Tarini, LH
Tarnowsky, T
Thein, D
Thomas, JH
Tian, J
Timmins, AR
Timoshenko, S
Tlusty, D
Tokarev, M
Trainor, TA
Tram, VN
Trentalange, S
Tribble, RE
Tsai, OD
Ulery, J
Ullrich, T
Underwood, DG
Van Buren, G
van Nieuwenhuizen, G
Vanfossen, JA
Varma, R
Vasconcelos, GMS
Vasiliev, AN
Videbaek, F
Viyogi, YP
Vokal, S
Voloshin, SA
Wada, M
Walker, M
Wang, F
Wang, G
Wang, H
Wang, JS
Wang, Q
Wang, X
Wang, XL
Wang, Y
Webb, G
Webb, JC
Westfall, GD
Whitten, C
Wieman, H
Wingfield, E
Wissink, SW
Witt, R
Wu, Y
Xie, W
Xu, N
Xu, QH
Xu, W
Xu, Y
Xu, Z
Xue, L
Yang, Y
Yepes, P
Yip, K
Yoo, IK
Yue, Q
Zawisza, M
Zbroszczyk, H
Zhan, W
Zhang, S
Zhang, WM
Zhang, XP
Zhang, Y
Zhang, ZP
Zhao, J
Zhong, C
Zhou, J
Zhou, W
Zhu, X
Zhu, YH
Zoulkarneev, R
Zoulkarneeva, Y
AF Abelev, B. I.
Aggarwal, M. M.
Ahammed, Z.
Alakhverdyants, A. V.
Anderson, B. D.
Arkhipkin, D.
Averichev, G. S.
Balewski, J.
Barnby, L. S.
Baumgart, S.
Beavis, D. R.
Bellwied, R.
Benedosso, F.
Betancourt, M. J.
Betts, R. R.
Bhasin, A.
Bhati, A. K.
Bichsel, H.
Bielcik, J.
Bielcikova, J.
Biritz, B.
Bland, L. C.
Bonner, B. E.
Bouchet, J.
Braidot, E.
Brandin, A. V.
Bridgeman, A.
Bruna, E.
Bueltmann, S.
Bunzarov, I.
Burton, T. P.
Cai, X. Z.
Caines, H.
Sanchez, M. Calderon de la Barca
Catu, O.
Cebra, D.
Cendejas, R.
Cervantes, M. C.
Chajecki, Z.
Chaloupka, P.
Chattopadhyay, S.
Chen, H. F.
Chen, J. H.
Chen, J. Y.
Cheng, J.
Cherney, M.
Chikanian, A.
Choi, K. E.
Christie, W.
Chung, P.
Clarke, R. F.
Codrington, M. J. M.
Corliss, R.
Cramer, J. G.
Crawford, H. J.
Das, D.
Dash, S.
Leyva, A. Davila
De Silva, L. C.
Debbe, R. R.
Dedovich, T. G.
DePhillips, M.
Derevschikov, A. A.
de Souza, R. Derradi
Didenko, L.
Djawotho, P.
Dogra, S. M.
Dong, X.
Drachenberg, J. L.
Draper, J. E.
Dunlop, J. C.
Mazumdar, M. R. Dutta
Efimov, L. G.
Elhalhuli, E.
Elnimr, M.
Engelage, J.
Eppley, G.
Erazmus, B.
Estienne, M.
Eun, L.
Evdokimov, O.
Fachini, P.
Fatemi, R.
Fedorisin, J.
Fersch, R. G.
Filip, P.
Finch, E.
Fine, V.
Fisyak, Y.
Gagliardi, C. A.
Gangadharan, D. R.
Ganti, M. S.
Garcia-Solis, E. J.
Geromitsos, A.
Geurts, F.
Ghazikhanian, V.
Ghosh, P.
Gorbunov, Y. N.
Gordon, A.
Grebenyuk, O.
Grosnick, D.
Grube, B.
Guertin, S. M.
Gupta, A.
Gupta, N.
Guryn, W.
Haag, B.
Hallman, T. J.
Hamed, A.
Han, L. -X.
Harris, J. W.
Hays-Wehle, J. P.
Heinz, M.
Heppelmann, S.
Hirsch, A.
Hjort, E.
Hoffman, A. M.
Hoffmann, G. W.
Hofman, D. J.
Hollis, R. S.
Huang, H. Z.
Humanic, T. J.
Huo, L.
Igo, G.
Iordanova, A.
Jacobs, P.
Jacobs, W. W.
Jakl, P.
Jena, C.
Jin, F.
Jones, C. L.
Jones, P. G.
Joseph, J.
Judd, E. G.
Kabana, S.
Kajimoto, K.
Kang, K.
Kapitan, J.
Kauder, K.
Keane, D.
Kechechyan, A.
Kettler, D.
Kikola, D. P.
Kiryluk, J.
Kisiel, A.
Klein, S. R.
Knospe, A. G.
Kocoloski, A.
Koetke, D. D.
Kollegger, T.
Konzer, J.
Kopytine, M.
Koralt, I.
Korsch, W.
Kotchenda, L.
Kouchpil, V.
Kravtsov, P.
Krueger, K.
Krus, M.
Kumar, L.
Kurnadi, P.
Lamont, M. A. C.
Landgraf, J. M.
LaPointe, S.
Lauret, J.
Lebedev, A.
Lednicky, R.
Lee, C. -H.
Lee, J. H.
Leight, W.
LeVine, M. J.
Li, C.
Li, L.
Li, N.
Li, W.
Li, X.
Li, X.
Li, Y.
Li, Z.
Lin, G.
Lindenbaum, S. J.
Lisa, M. A.
Liu, F.
Liu, H.
Liu, J.
Ljubicic, T.
Llope, W. J.
Longacre, R. S.
Love, W. A.
Lu, Y.
Ma, G. L.
Ma, Y. G.
Mahapatra, D. P.
Majka, R.
Mall, O. I.
Mangotra, L. K.
Manweiler, R.
Margetis, S.
Markert, C.
Masui, H.
Matis, H. S.
Matulenko, Yu A.
McDonald, D.
McShane, T. S.
Meschanin, A.
Milner, R.
Minaev, N. G.
Mioduszewski, S.
Mischke, A.
Mitrovski, M. K.
Mohanty, B.
Mondal, M. M.
Morozov, D. A.
Munhoz, M. G.
Nandi, B. K.
Nattrass, C.
Nayak, T. K.
Nelson, J. M.
Netrakanti, P. K.
Ng, M. J.
Nogach, L. V.
Nurushev, S. B.
Odyniec, G.
Ogawa, A.
Okada, H.
Okorokov, V.
Olson, D.
Pachr, M.
Page, B. S.
Pal, S. K.
Pandit, Y.
Panebratsev, Y.
Pawlak, T.
Peitzmann, T.
Perevoztchikov, V.
Perkins, C.
Peryt, W.
Phatak, S. C.
Pile, P.
Planinic, M.
Ploskon, M. A.
Pluta, J.
Plyku, D.
Poljak, N.
Poskanzer, A. M.
Potukuchi, B. V. K. S.
Powell, C. B.
Prindle, D.
Pruneau, C.
Pruthi, N. K.
Pujahari, P. R.
Putschke, J.
Raniwala, R.
Raniwala, S.
Ray, R. L.
Redwine, R.
Reed, R.
Rehberg, J. M.
Ritter, H. G.
Roberts, J. B.
Rogachevskiy, O. V.
Romero, J. L.
Rose, A.
Roy, C.
Ruan, L.
Russcher, M. J.
Sahoo, R.
Sakai, S.
Sakrejda, I.
Sakuma, T.
Salur, S.
Sandweiss, J.
Sangaline, E.
Schambach, J.
Scharenberg, R. P.
Schmitz, N.
Schuster, T. R.
Seele, J.
Seger, J.
Selyuzhenkov, I.
Seyboth, P.
Shahaliev, E.
Shao, M.
Sharma, M.
Shi, S. S.
Sichtermann, E. P.
Simon, F.
Singaraju, R. N.
Skoby, M. J.
Smirnov, N.
Sorensen, P.
Sowinski, J.
Spinka, H. M.
Srivastava, B.
Stanislaus, T. D. S.
Staszak, D.
Stevens, J. R.
Stock, R.
Strikhanov, M.
Stringfellow, B.
Suaide, A. A. P.
Suarez, M. C.
Subba, N. L.
Sumbera, M.
Sun, X. M.
Sun, Y.
Sun, Z.
Surrow, B.
Symons, T. J. M.
de Toledo, A. Szanto
Takahashi, J.
Tang, A. H.
Tang, Z.
Tarini, L. H.
Tarnowsky, T.
Thein, D.
Thomas, J. H.
Tian, J.
Timmins, A. R.
Timoshenko, S.
Tlusty, D.
Tokarev, M.
Trainor, T. A.
Tram, V. N.
Trentalange, S.
Tribble, R. E.
Tsai, O. D.
Ulery, J.
Ullrich, T.
Underwood, D. G.
Van Buren, G.
van Nieuwenhuizen, G.
Vanfossen, J. A., Jr.
Varma, R.
Vasconcelos, G. M. S.
Vasiliev, A. N.
Videbaek, F.
Viyogi, Y. P.
Vokal, S.
Voloshin, S. A.
Wada, M.
Walker, M.
Wang, F.
Wang, G.
Wang, H.
Wang, J. S.
Wang, Q.
Wang, X.
Wang, X. L.
Wang, Y.
Webb, G.
Webb, J. C.
Westfall, G. D.
Whitten, C., Jr.
Wieman, H.
Wingfield, E.
Wissink, S. W.
Witt, R.
Wu, Y.
Xie, W.
Xu, N.
Xu, Q. H.
Xu, W.
Xu, Y.
Xu, Z.
Xue, L.
Yang, Y.
Yepes, P.
Yip, K.
Yoo, I. -K.
Yue, Q.
Zawisza, M.
Zbroszczyk, H.
Zhan, W.
Zhang, S.
Zhang, W. M.
Zhang, X. P.
Zhang, Y.
Zhang, Z. P.
Zhao, J.
Zhong, C.
Zhou, J.
Zhou, W.
Zhu, X.
Zhu, Y. H.
Zoulkarneev, R.
Zoulkarneeva, Y.
CA STAR Collaboration
TI Spectra of identified high-p(T) pi(+/-) and p((p)over-bar ) in Cu + Cu
collisions at root s(NN)=200 GeV
SO PHYSICAL REVIEW C
LA English
DT Article
ID LARGE TRANSVERSE-MOMENTUM; D+AU COLLISIONS; HADRONS; QUARK; JETS; P+P
AB We report new results on identified (anti) proton and charged pion spectra at large transverse momenta (3 < p(T) < 10 GeV/c) from Cu + Cu collisions at root s(NN) = 200 GeV using the STAR detector at the Relativistic Heavy Ion Collider (RHIC). This study explores the system size dependence of two novel features observed at RHIC with heavy ions: the hadron suppression at high-p(T) and the anomalous baryon to meson enhancement at intermediate transverse momenta. Both phenomena could be attributed to the creation of a new form of QCD matter. The results presented here bridge the system size gap between the available pp and Au + Au data, and allow for a detailed exploration of the onset of the novel features. Comparative analysis of all available 200 GeV data indicates that the system size is a major factor determining both the magnitude of the hadron spectra suppression at large transverse momenta and the relative baryon to meson enhancement.
C1 [Abelev, B. I.; Betts, R. R.; Evdokimov, O.; Garcia-Solis, E. J.; Hofman, D. J.; Hollis, R. S.; Iordanova, A.; Kauder, K.; Suarez, M. C.] Univ Illinois, Chicago, IL 60607 USA.
[Bridgeman, A.; Krueger, K.; Spinka, H. M.; Underwood, D. G.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Barnby, L. S.; Burton, T. P.; Elhalhuli, E.; Jones, P. G.; Nelson, J. M.] Univ Birmingham, Birmingham, W Midlands, England.
[Arkhipkin, D.; Beavis, D. R.; Bland, L. C.; Christie, W.; Debbe, R. R.; DePhillips, M.; Didenko, L.; Dunlop, J. C.; Fachini, P.; Fine, V.; Fisyak, Y.; Gordon, A.; Guryn, W.; Hallman, T. J.; Lamont, M. A. C.; Landgraf, J. M.; Lauret, J.; Lebedev, A.; Lee, J. H.; LeVine, M. J.; Ljubicic, T.; Longacre, R. S.; Love, W. A.; Ogawa, A.; Okada, H.; Perevoztchikov, V.; Pile, P.; Ruan, L.; Sorensen, P.; Tang, A. H.; Ullrich, T.; Van Buren, G.; Videbaek, F.; Xu, Z.; Yip, K.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Crawford, H. J.; Engelage, J.; Judd, E. G.; Ng, M. J.; Perkins, C.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Sanchez, M. Calderon de la Barca; Cebra, D.; Das, D.; Draper, J. E.; Haag, B.; Liu, H.; Mall, O. I.; Reed, R.; Romero, J. L.; Salur, S.; Sangaline, E.] Univ Calif Davis, Davis, CA 95616 USA.
[Biritz, B.; Cendejas, R.; Gangadharan, D. R.; Ghazikhanian, V.; Guertin, S. M.; Huang, H. Z.; Igo, G.; Kurnadi, P.; Sakai, S.; Staszak, D.; Trentalange, S.; Tsai, O. D.; Wang, G.; Whitten, C., Jr.; Xu, W.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
[de Souza, R. Derradi; Takahashi, J.; Vasconcelos, G. M. S.] Univ Estadual Campinas, Sao Paulo, Brazil.
[Cherney, M.; Gorbunov, Y. N.; McShane, T. S.; Seger, J.] Creighton Univ, Omaha, NE 68178 USA.
[Bielcik, J.; Krus, M.; Pachr, M.] Czech Tech Univ, Fac Nucl Sci & Phys Engn, CR-11519 Prague, Czech Republic.
[Bielcikova, J.; Chaloupka, P.; Chung, P.; Jakl, P.; Kapitan, J.; Kouchpil, V.; Sumbera, M.; Tlusty, D.] AS CR, Inst Nucl Phys, Rez 25068, Czech Republic.
[Kollegger, T.; Mitrovski, M. K.; Rehberg, J. M.; Schuster, T. R.; Stock, R.] Goethe Univ Frankfurt, Frankfurt, Germany.
[Dash, S.; Jena, C.; Mahapatra, D. P.; Phatak, S. C.] Inst Phys, Bhubaneswar 751005, Orissa, India.
[Nandi, B. K.; Pujahari, P. R.; Varma, R.] Indian Inst Technol, Mumbai, Maharashtra, India.
[Jacobs, W. W.; Page, B. S.; Selyuzhenkov, I.; Sowinski, J.; Stevens, J. R.; Wissink, S. W.] Indiana Univ, Bloomington, IN 47408 USA.
[Bhasin, A.; Dogra, S. M.; Gupta, A.; Gupta, N.; Mangotra, L. K.; Potukuchi, B. V. K. S.] Univ Jammu, Jammu 180001, India.
[Alakhverdyants, A. V.; Averichev, G. S.; Bunzarov, I.; Dedovich, T. G.; Efimov, L. G.; Filip, P.; Kechechyan, A.; Lednicky, R.; Panebratsev, Y.; Rogachevskiy, O. V.; Shahaliev, E.; Tokarev, M.; Vokal, S.; Zoulkarneev, R.; Zoulkarneeva, Y.] Joint Inst Nucl Res, RU-141980 Dubna, Russia.
[Anderson, B. D.; Bouchet, J.; Joseph, J.; Keane, D.; Kopytine, M.; Margetis, S.; Pandit, Y.; Subba, N. L.; Vanfossen, J. A., Jr.; Zhang, W. M.] Kent State Univ, Kent, OH 44242 USA.
[Fatemi, R.; Fedorisin, J.; Fersch, R. G.; Korsch, W.; Webb, G.] Univ Kentucky, Lexington, KY 40506 USA.
[Sun, Z.; Wang, J. S.; Yang, Y.; Zhan, W.] Inst Modern Phys, Lanzhou, Peoples R China.
[Dong, X.; Grebenyuk, O.; Hjort, E.; Jacobs, P.; Kikola, D. P.; Kiryluk, J.; Klein, S. R.; Masui, H.; Matis, H. S.; Odyniec, G.; Olson, D.; Ploskon, M. A.; Poskanzer, A. M.; Powell, C. B.; Ritter, H. G.; Rose, A.; Sakrejda, I.; Sandweiss, J.; Sichtermann, E. P.; Sun, X. M.; Symons, T. J. M.; Thomas, J. H.; Tram, V. N.; Wieman, H.; Xu, N.; Zhang, X. P.; Zhang, Y.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Balewski, J.; Betancourt, M. J.; Corliss, R.; Hays-Wehle, J. P.; Hoffman, A. M.; Jones, C. L.; Kocoloski, A.; Leight, W.; Milner, R.; Redwine, R.; Sakuma, T.; Seele, J.; Surrow, B.; van Nieuwenhuizen, G.; Walker, M.] MIT, Cambridge, MA 02139 USA.
[Schmitz, N.; Seyboth, P.; Simon, F.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
[Tarnowsky, T.; Wang, H.; Westfall, G. D.] Michigan State Univ, E Lansing, MI 48824 USA.
[Brandin, A. V.; Kotchenda, L.; Kravtsov, P.; Okorokov, V.; Strikhanov, M.; Timoshenko, S.] Moscow Engn Phys Inst, Moscow 115409, Russia.
[Lindenbaum, S. J.] CUNY City Coll, New York, NY 10031 USA.
[Benedosso, F.; Braidot, E.; Mischke, A.; Peitzmann, T.; Russcher, M. J.] NIKHEF, Amsterdam, Netherlands.
[Benedosso, F.; Braidot, E.; Mischke, A.; Peitzmann, T.; Russcher, M. J.] Univ Utrecht, Amsterdam, Netherlands.
[Chajecki, Z.; Humanic, T. J.; Lisa, M. A.] Ohio State Univ, Columbus, OH 43210 USA.
[Bueltmann, S.; Koralt, I.; Plyku, D.] Old Dominion Univ, Norfolk, VA 23529 USA.
[Aggarwal, M. M.; Bhati, A. K.; Kumar, L.; Pruthi, N. K.] Panjab Univ, Chandigarh 160014, India.
[Eun, L.; Heppelmann, S.] Penn State Univ, University Pk, PA 16802 USA.
[Derevschikov, A. A.; Matulenko, Yu A.; Meschanin, A.; Minaev, N. G.; Morozov, D. A.; Nogach, L. V.; Nurushev, S. B.; Vasiliev, A. N.] Inst High Energy Phys, Protvino, Russia.
[Hirsch, A.; Konzer, J.; Li, X.; Netrakanti, P. K.; Scharenberg, R. P.; Skoby, M. J.; Srivastava, B.; Stringfellow, B.; Ulery, J.; Wang, F.; Wang, Q.; Xie, W.] Purdue Univ, W Lafayette, IN 47907 USA.
[Choi, K. E.; Grube, B.; Lee, C. -H.; Yoo, I. -K.] Pusan Natl Univ, Pusan 609735, South Korea.
[Raniwala, R.; Raniwala, S.] Univ Rajasthan, Jaipur 302004, Rajasthan, India.
[Bonner, B. E.; Eppley, G.; Geurts, F.; Liu, J.; Llope, W. J.; McDonald, D.; Roberts, J. B.; Yepes, P.; Zhou, J.] Rice Univ, Houston, TX 77251 USA.
[Munhoz, M. G.; Suaide, A. A. P.; de Toledo, A. Szanto] Univ Sao Paulo, Sao Paulo, Brazil.
[Chen, H. F.; Li, C.; Lu, Y.; Shao, M.; Sun, Y.; Tang, Z.; Wang, X. L.; Xu, Y.; Zhang, Z. P.] Univ Sci & Technol China, Anhua 230026, Peoples R China.
[Li, X.; Xu, Q. H.; Zhou, W.] Shandong Univ, Jinan 250100, Peoples R China.
[Cai, X. Z.; Chen, J. H.; Han, L. -X.; Jin, F.; Li, W.; Ma, G. L.; Ma, Y. G.; Tian, J.; Xue, L.; Zhang, S.; Zhao, J.; Zhong, C.; Zhu, Y. H.] Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
[Erazmus, B.; Estienne, M.; Geromitsos, A.; Kabana, S.; Roy, C.; Sahoo, R.] SUBATECH, Nantes, France.
[Cervantes, M. C.; Clarke, R. F.; Codrington, M. J. M.; Djawotho, P.; Drachenberg, J. L.; Gagliardi, C. A.; Hamed, A.; Huo, L.; Mioduszewski, S.; Tribble, R. E.] Texas A&M Univ, College Stn, TX 77843 USA.
[Leyva, A. Davila; Hoffmann, G. W.; Kajimoto, K.; Li, L.; Markert, C.; Ray, R. L.; Schambach, J.; Thein, D.; Wada, M.; Wingfield, E.] Univ Texas Austin, Austin, TX 78712 USA.
[Cheng, J.; Kang, K.; Li, Y.; Wang, X.; Wang, Y.; Yue, Q.; Zhu, X.] Tsinghua Univ, Beijing 100084, Peoples R China.
[Witt, R.] USN Acad, Annapolis, MD 21402 USA.
[Grosnick, D.; Koetke, D. D.; Manweiler, R.; Stanislaus, T. D. S.; Webb, J. C.] Valparaiso Univ, Valparaiso, IN 46383 USA.
[Ahammed, Z.; Chattopadhyay, S.; Mazumdar, M. R. Dutta; Ganti, M. S.; Ghosh, P.; Mohanty, B.; Mondal, M. M.; Nayak, T. K.; Pal, S. K.; Singaraju, R. N.; Viyogi, Y. P.] Ctr Variable Energy Cyclotron, Kolkata 700064, India.
[Kisiel, A.; Pawlak, T.; Peryt, W.; Pluta, J.; Zawisza, M.; Zbroszczyk, H.] Warsaw Univ Technol, Warsaw, Poland.
[Bichsel, H.; Cramer, J. G.; Kettler, D.; Prindle, D.; Trainor, T. A.] Univ Washington, Seattle, WA 98195 USA.
[Bellwied, R.; De Silva, L. C.; Elnimr, M.; LaPointe, S.; Pruneau, C.; Sharma, M.; Tarini, L. H.; Timmins, A. R.; Voloshin, S. A.] Wayne State Univ, Detroit, MI 48201 USA.
[Chen, J. Y.; Li, N.; Li, Z.; Liu, F.; Shi, S. S.; Wu, Y.] CCNU HZNU, Inst Particle Phys, Wuhan 430079, Peoples R China.
[Baumgart, S.; Bruna, E.; Caines, H.; Catu, O.; Chikanian, A.; Finch, E.; Harris, J. W.; Heinz, M.; Knospe, A. G.; Lin, G.; Majka, R.; Nattrass, C.; Putschke, J.; Smirnov, N.] Yale Univ, New Haven, CT 06520 USA.
[Planinic, M.; Poljak, N.] Univ Zagreb, HR-10002 Zagreb, Croatia.
RP Abelev, BI (reprint author), Univ Illinois, Chicago, IL 60607 USA.
RI Lednicky, Richard/K-4164-2013; Yang, Yanyun/B-9485-2014; Bielcikova,
Jana/G-9342-2014; Barnby, Lee/G-2135-2010; Mischke, Andre/D-3614-2011;
Takahashi, Jun/B-2946-2012; Planinic, Mirko/E-8085-2012; Yoo,
In-Kwon/J-6222-2012; Peitzmann, Thomas/K-2206-2012; Witt,
Richard/H-3560-2012; Yip, Kin/D-6860-2013; Xue, Liang/F-8077-2013;
Voloshin, Sergei/I-4122-2013; Pandit, Yadav/I-2170-2013; Sumbera,
Michal/O-7497-2014; Strikhanov, Mikhail/P-7393-2014; Xu,
Wenqin/H-7553-2014; Dogra, Sunil /B-5330-2013; Chaloupka,
Petr/E-5965-2012; Nattrass, Christine/J-6752-2016; Derradi de Souza,
Rafael/M-4791-2013; Suaide, Alexandre/L-6239-2016; Inst. of Physics,
Gleb Wataghin/A-9780-2017; Okorokov, Vitaly/C-4800-2017; Ma,
Yu-Gang/M-8122-2013
OI Yang, Yanyun/0000-0002-5982-1706; Barnby, Lee/0000-0001-7357-9904;
Takahashi, Jun/0000-0002-4091-1779; Peitzmann,
Thomas/0000-0002-7116-899X; Yip, Kin/0000-0002-8576-4311; Xue,
Liang/0000-0002-2321-9019; Pandit, Yadav/0000-0003-2809-7943; Sumbera,
Michal/0000-0002-0639-7323; Strikhanov, Mikhail/0000-0003-2586-0405; Xu,
Wenqin/0000-0002-5976-4991; Nattrass, Christine/0000-0002-8768-6468;
Derradi de Souza, Rafael/0000-0002-2084-7001; Suaide,
Alexandre/0000-0003-2847-6556; Okorokov, Vitaly/0000-0002-7162-5345; Ma,
Yu-Gang/0000-0002-0233-9900
FU Offices of Nuclear Physics and High-Energy Physics within the US DOE
Office of Science; US NSF; Sloan Foundation; DFG; CNRS/IN2P3; STFC;
EPSRC of the United Kingdom; FAPESP; CNPq of Brazil; Ministry of
Education and Science of the Russian Federation; NNSFC; CAS; MoST; MoE
of China; GA and MSMT of the Czech Republic; FOM and NOW of the
Netherlands; DAE; DST; CSIR of India; Polish Ministry of Science and
Higher Education,; Korea Research Foundation; Ministry of Science,
Education and Sports of the Republic Of Croatia; Russian Ministry of
Science and Technology; RosAtom of Russia
FX We thank the RHIC Operations Group and RCF at BNL, the NERSC Center at
LBNL, and the Open Science Grid consortium for providing resources and
support. This work was supported in part by the Offices of Nuclear
Physics and High-Energy Physics within the US DOE Office of Science, the
US NSF, the Sloan Foundation, the DFG cluster of excellence 'Origin and
Structure of the Universe', CNRS/IN2P3, STFC and EPSRC of the United
Kingdom, FAPESP CNPq of Brazil, Ministry of Education and Science of the
Russian Federation, NNSFC, CAS, MoST, and MoE of China, GA and MSMT of
the Czech Republic, FOM and NOW of the Netherlands, DAE, DST, and CSIR
of India, Polish Ministry of Science and Higher Education, Korea
Research Foundation, Ministry of Science, Education and Sports of the
Republic Of Croatia, Russian Ministry of Science and Technology, and
RosAtom of Russia.
NR 20
TC 12
Z9 13
U1 0
U2 17
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
EI 1089-490X
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 054907
DI 10.1103/PhysRevC.81.054907
PG 8
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800050
ER
PT J
AU Aharmim, B
Ahmed, SN
Anthony, AE
Barros, N
Beier, EW
Bellerive, A
Beltran, B
Bergevin, M
Biller, SD
Boudjemline, K
Boulay, MG
Burritt, TH
Cai, B
Chan, YD
Chauhan, D
Chen, M
Cleveland, BT
Cox, GA
Dai, X
Deng, H
Detwiler, J
DiMarco, M
Doe, PJ
Doucas, G
Drouin, PL
Duba, CA
Duncan, FA
Dunford, M
Earle, ED
Elliott, SR
Evans, HC
Ewan, GT
Farine, J
Fergani, H
Fleurot, F
Ford, RJ
Formaggio, JA
Gagnon, N
Goon, JT
Graham, K
Guillian, E
Habib, S
Hahn, RL
Hallin, AL
Hallman, ED
Harvey, PJ
Hazama, R
Heintzelman, WJ
Heise, J
Helmer, RL
Hime, A
Howard, C
Howe, MA
Huang, M
Jamieson, B
Jelley, NA
Keeter, KJ
Klein, JR
Kormos, LL
Kos, M
Kraus, C
Krauss, CB
Kutter, T
Kyba, CCM
Law, J
Lawson, IT
Lesko, KT
Leslie, JR
Levine, I
Loach, JC
MacLellan, R
Majerus, S
Mak, HB
Maneira, J
Martin, R
McCauley, N
McDonald, AB
McGee, S
Miller, ML
Monreal, B
Monroe, J
Morissette, B
Nickel, BG
Noble, AJ
O'Keeffe, HM
Oblath, NS
Gann, GDO
Oser, SM
Ott, RA
Peeters, SJM
Poon, AWP
Prior, G
Reitzner, SD
Rielage, K
Robertson, BC
Robertson, RGH
Schwendener, MH
Secrest, JA
Seibert, SR
Simard, O
Sinclair, D
Skensved, P
Sonley, TJ
Stonehill, LC
Tesic, G
Tolich, N
Tsui, T
Tunnell, CD
Van Berg, R
VanDevender, BA
Virtue, CJ
Wall, BL
Waller, D
Tseung, HWC
Wark, DL
West, N
Wilkerson, JF
Wilson, JR
Wouters, JM
Wright, A
Yeh, M
Zhang, F
Zuber, K
AF Aharmim, B.
Ahmed, S. N.
Anthony, A. E.
Barros, N.
Beier, E. W.
Bellerive, A.
Beltran, B.
Bergevin, M.
Biller, S. D.
Boudjemline, K.
Boulay, M. G.
Burritt, T. H.
Cai, B.
Chan, Y. D.
Chauhan, D.
Chen, M.
Cleveland, B. T.
Cox, G. A.
Dai, X.
Deng, H.
Detwiler, J.
DiMarco, M.
Doe, P. J.
Doucas, G.
Drouin, P-L.
Duba, C. A.
Duncan, F. A.
Dunford, M.
Earle, E. D.
Elliott, S. R.
Evans, H. C.
Ewan, G. T.
Farine, J.
Fergani, H.
Fleurot, F.
Ford, R. J.
Formaggio, J. A.
Gagnon, N.
Goon, J. Tm
Graham, K.
Guillian, E.
Habib, S.
Hahn, R. L.
Hallin, A. L.
Hallman, E. D.
Harvey, P. J.
Hazama, R.
Heintzelman, W. J.
Heise, J.
Helmer, R. L.
Hime, A.
Howard, C.
Howe, M. A.
Huang, M.
Jamieson, B.
Jelley, N. A.
Keeter, K. J.
Klein, J. R.
Kormos, L. L.
Kos, M.
Kraus, C.
Krauss, C. B.
Kutter, T.
Kyba, C. C. M.
Law, J.
Lawson, I. T.
Lesko, K. T.
Leslie, J. R.
Levine, I.
Loach, J. C.
MacLellan, R.
Majerus, S.
Mak, H. B.
Maneira, J.
Martin, R.
McCauley, N.
McDonald, A. B.
McGee, S.
Miller, M. L.
Monreal, B.
Monroe, J.
Morissette, B.
Nickel, B. G.
Noble, A. J.
O'Keeffe, H. M.
Oblath, N. S.
Gann, G. D. Orebi
Oser, S. M.
Ott, R. A.
Peeters, S. J. M.
Poon, A. W. P.
Prior, G.
Reitzner, S. D.
Rielage, K.
Robertson, B. C.
Robertson, R. G. H.
Schwendener, M. H.
Secrest, J. A.
Seibert, S. R.
Simard, O.
Sinclair, D.
Skensved, P.
Sonley, T. J.
Stonehill, L. C.
Tesic, G.
Tolich, N.
Tsui, T.
Tunnell, C. D.
Van Berg, R.
VanDevender, B. A.
Virtue, C. J.
Wall, B. L.
Waller, D.
Tseung, H. Wan Chan
Wark, D. L.
West, N.
Wilkerson, J. F.
Wilson, J. R.
Wouters, J. M.
Wright, A.
Yeh, M.
Zhang, F.
Zuber, K.
CA SNO Collaboration
TI Low-energy-threshold analysis of the Phase I and Phase II data sets of
the Sudbury Neutrino Observatory
SO PHYSICAL REVIEW C
LA English
DT Article
ID CALIBRATION SOURCE; PHYSICS; MATTER; OSCILLATIONS
AB Results are reported from a joint analysis of Phase I and Phase II data from the Sudbury Neutrino Observatory. The effective electron kinetic energy threshold used is T(eff) = 3.5MeV, the lowest analysis threshold yet achieved with water Cherenkov detector data. In units of 106 cm(-2) s(-1), the total flux of active-flavor neutrinos from (8)B decay in the Sun measured using the neutral current (NC) reaction of neutrinos on deuterons, with no constraint on the (8)B neutrino energy spectrum, is found to be Phi(NC) = 5.140(-0.158)(+0.160)(stat)(-0.117)(+0.132)(syst). These uncertainties are more than a factor of 2 smaller than previously published results. Also presented are the spectra of recoil electrons from the charged current reaction of neutrinos on deuterons and the elastic scattering of electrons. A fit to the Sudbury Neutrino Observatory data in which the free parameters directly describe the total (8)B neutrino flux and the energy-dependent nu(e) survival probability provides a measure of the total (8)B neutrino flux Phi(8B) = 5.046(-0.152)(+0.159)(stat)(-0.123)(+0.107)(syst). Combining these new results with results of all other solar experiments and the KamLAND reactor experiment yields best- fit values of the mixing parameters of theta(12) = 34.06(-0.84)(+1.16) degrees and Delta m(21)(2) = 7.59(-0.21)(+0.20) x 10(-5) eV(2). The global value of Phi(8B) is extracted to a precision of (+2.38)(-2.95)%. In a three-flavor analysis the best fit value of sin(2) theta(13) is 2.00(-1.63)(+2.09) x 10(-2). This implies an upper bound of sin(2) theta(13) < 0.057 (95% C.L.).
C1 [Aharmim, B.; Chauhan, D.; Farine, J.; Fleurot, F.; Hallman, E. D.; Huang, M.; Schwendener, M. H.; Virtue, C. J.] Laurentian Univ, Dept Phys & Astron, Sudbury, ON P3E 2C6, Canada.
[Beltran, B.; Habib, S.; Hallin, A. L.; Howard, C.; Krauss, C. B.] Univ Alberta, Dept Phys, Edmonton, AB T6G 2R3, Canada.
[Heise, J.; Jamieson, B.; Oser, S. M.; Tsui, T.] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada.
[Hahn, R. L.; Yeh, M.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
[Bellerive, A.; Boudjemline, K.; Dai, X.; Drouin, P-L.; Farine, J.; Graham, K.; Levine, I.; Noble, A. J.; Simard, O.; Sinclair, D.; Tesic, G.; Waller, D.; Zhang, F.] Carleton Univ, Ottawa Carleton Inst Phys, Dept Phys, Ottawa, ON K1S 5B6, Canada.
[Bergevin, M.; Law, J.; Lawson, I. T.; Nickel, B. G.; Reitzner, S. D.] Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada.
[Bergevin, M.; Chan, Y. D.; Detwiler, J.; Gagnon, N.; Lesko, K. T.; Loach, J. C.; Martin, R.; Poon, A. W. P.; Prior, G.] Lawrence Berkeley Natl Lab, Inst Nucl & Particle Astrophys, Berkeley, CA 94720 USA.
[Bergevin, M.; Chan, Y. D.; Detwiler, J.; Gagnon, N.; Lesko, K. T.; Loach, J. C.; Martin, R.; Poon, A. W. P.; Prior, G.] Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
[Barros, N.; Maneira, J.] Lab Instrumentacao & Fis Expt Particulas, Lisbon, Portugal.
[Elliott, S. R.; Gagnon, N.; Heise, J.; Hime, A.; Rielage, K.; Seibert, S. R.; Stonehill, L. C.; Wouters, J. M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Goon, J. Tm; Kutter, T.] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
[Formaggio, J. A.; Miller, M. L.; Monreal, B.; Monroe, J.; Ott, R. A.; Sonley, T. J.] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
[Biller, S. D.; Cleveland, B. T.; Dai, X.; Doucas, G.; Fergani, H.; Gagnon, N.; Jelley, N. A.; Loach, J. C.; Majerus, S.; McCauley, N.; O'Keeffe, H. M.; Gann, G. D. Orebi; Peeters, S. J. M.; Tseung, H. Wan Chan; West, N.; Wilson, J. R.; Zuber, K.] Univ Oxford, Dept Phys, Oxford OX1 3RH, England.
[Beier, E. W.; Deng, H.; Dunford, M.; Heintzelman, W. J.; Klein, J. R.; Kyba, C. C. M.; McCauley, N.; Gann, G. D. Orebi; Secrest, J. A.; Van Berg, R.] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA.
[Ahmed, S. N.; Boulay, M. G.; Cai, B.; Chen, M.; Dai, X.; DiMarco, M.; Duncan, F. A.; Earle, E. D.; Evans, H. C.; Ewan, G. T.; Ford, R. J.; Graham, K.; Guillian, E.; Harvey, P. J.; Heise, J.; Kormos, L. L.; Kos, M.; Kraus, C.; Leslie, J. R.; MacLellan, R.; Mak, H. B.; Martin, R.; McDonald, A. B.; Noble, A. J.; Robertson, B. C.; Skensved, P.; Wright, A.] Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada.
[Wark, D. L.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Duncan, F. A.; Ford, R. J.; Keeter, K. J.; Lawson, I. T.; Morissette, B.] SNOLAB, Sudbury, ON P3Y 1M3, Canada.
[Anthony, A. E.; Huang, M.; Klein, J. R.; Seibert, S. R.; Tunnell, C. D.] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA.
[Helmer, R. L.; Sinclair, D.] TRIUMF, Vancouver, BC V6T 2A3, Canada.
[Burritt, T. H.; Cox, G. A.; Doe, P. J.; Duba, C. A.; Elliott, S. R.; Formaggio, J. A.; Gagnon, N.; Hazama, R.; Howe, M. A.; McGee, S.; Oblath, N. S.; Rielage, K.; Robertson, R. G. H.; Stonehill, L. C.; Tolich, N.; VanDevender, B. A.; Wall, B. L.; Tseung, H. Wan Chan; Wilkerson, J. F.] Univ Washington, Ctr Expt Nucl Phys & Astrophys, Seattle, WA 98195 USA.
[Burritt, T. H.; Cox, G. A.; Doe, P. J.; Duba, C. A.; Elliott, S. R.; Formaggio, J. A.; Gagnon, N.; Hazama, R.; Howe, M. A.; McGee, S.; Oblath, N. S.; Rielage, K.; Robertson, R. G. H.; Stonehill, L. C.; Tolich, N.; VanDevender, B. A.; Wall, B. L.; Tseung, H. Wan Chan; Wilkerson, J. F.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
RP Aharmim, B (reprint author), Laurentian Univ, Dept Phys & Astron, Sudbury, ON P3E 2C6, Canada.
RI Hallin, Aksel/H-5881-2011; Kormos, Laura/D-1032-2012; Kyba,
Christopher/I-2014-2012; Dai, Xiongxin/I-3819-2013; Prior,
Gersende/I-8191-2013; Maneira, Jose/D-8486-2011; Barros,
Nuno/O-1921-2016;
OI Kyba, Christopher/0000-0001-7014-1843; Maneira,
Jose/0000-0002-3222-2738; Barros, Nuno/0000-0002-1192-0705; Wilkerson,
John/0000-0002-0342-0217; Prior, Gersende/0000-0002-6058-1420; Rielage,
Keith/0000-0002-7392-7152
FU Canada: Natural Sciences and Engineering Research Council; Industry
Canada; National Research Council; Northern Ontario Heritage Fund;
Atomic Energy of Canada, Ltd.; Ontario Power Generation; High
Performance Computing Virtual Laboratory; Canada Foundation for
Innovation; Canada Research Chairs; United States: Department of Energy;
National Energy Research Scientific Computing Center; Alfred P. Sloan
Foundation; UK: Science and Technology Facilities Council; Portugal:
Fundacao para a Ciencia e a Technologia; University of Liverpool and the
Texas Advanced Computing Center
FX This research was supported by the following: Canada: Natural Sciences
and Engineering Research Council, Industry Canada, National Research
Council, Northern Ontario Heritage Fund, Atomic Energy of Canada, Ltd.,
Ontario Power Generation, High Performance Computing Virtual Laboratory,
Canada Foundation for Innovation, Canada Research Chairs; United States:
Department of Energy, National Energy Research Scientific Computing
Center, Alfred P. Sloan Foundation; UK: Science and Technology
Facilities Council; Portugal: Fundacao para a Ciencia e a Technologia.
We thank the SNO technical staff for their strong contributions. We
thank the University of Liverpool and the Texas Advanced Computing
Center for their grants of CPU time. We thank NVIDIA for the donation of
a Tesla graphics card. We thank Vale Inco, Ltd. for hosting this
project.
NR 50
TC 170
Z9 170
U1 1
U2 15
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 055504
DI 10.1103/PhysRevC.81.055504
PG 49
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800072
ER
PT J
AU Allmond, JM
Wood, JL
Kulp, WD
AF Allmond, J. M.
Wood, J. L.
Kulp, W. D.
TI Destructive interference of E2 matrix elements in a triaxial rotor model
SO PHYSICAL REVIEW C
LA English
DT Article
ID SYMMETRY; NUCLEI; PT-196; O(6)
AB A triaxial rotor model with independent inertia and electric quadrupole tensors is applied to nuclei that have certain E2 matrix elements equal to zero. It is shown that such vanishing E2 matrix elements are explained by the model as a destructive interference effect. The example of Pt-196 is considered.
C1 [Allmond, J. M.] Oak Ridge Natl Lab, Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA.
[Allmond, J. M.] Univ Richmond, Dept Phys, Richmond, VA 23173 USA.
[Wood, J. L.; Kulp, W. D.] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA.
RP Allmond, JM (reprint author), Oak Ridge Natl Lab, Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA.
OI Allmond, James Mitchell/0000-0001-6533-8721
FU Office of Nuclear Physics, US Department of Energy; US Department of
Energy; University of Richmond [DE-FG52-06NA26206, DE-FG02-05ER41379];
Georgia Institute of Technology [DE-FG02-96ER40958]
FX Research sponsored by the Office of Nuclear Physics, US Department of
Energy. The Joint Institute for Heavy Ion Research has as member
institutions: the University of Tennessee, Vanderbilt University, and
the Oak Ridge National Laboratory; it is supported by the members and by
the US Department of Energy. This work was also supported in part by the
University of Richmond under Grant Nos. DE-FG52-06NA26206 and
DE-FG02-05ER41379, and by the Georgia Institute of Technology under
Grant No. DE-FG02-96ER40958.
NR 7
TC 6
Z9 6
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9985
EI 2469-9993
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 051305
DI 10.1103/PhysRevC.81.051305
PG 3
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800005
ER
PT J
AU Christy, ME
Bosted, PE
AF Christy, M. E.
Bosted, P. E.
TI Empirical fit to precision inclusive electron-proton cross sections in
the resonance region
SO PHYSICAL REVIEW C
LA English
DT Article
ID HYDROGEN
AB An empirical fit is described to measurements of inclusive inelastic electron-proton cross sections in the kinematic range of four-momentum transfer 0 <= Q(2) < 8 GeV(2) and final-state invariant mass 1.1 < W < 3.1 GeV. The fit is constrained by the recent high-precision longitudinal and transverse separated cross section measurements from Jefferson Lab Hall C, unseparated Hall C measurements up to Q(2) approximate to 7.5 GeV(2), and photoproduction data at Q(2) = 0. Compared to previous fits, the present fit covers a wider kinematic range, fits both transverse and longitudinal cross sections, and features smooth transitions to the photoproduction data at Q(2) = 0 and deep inelastic scattering data at high Q(2) and W.
C1 [Christy, M. E.] Hampton Univ, Hampton, VA 23668 USA.
[Bosted, P. E.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
RP Christy, ME (reprint author), Hampton Univ, Hampton, VA 23668 USA.
EM christy@jlab.org; bosted@jlab.org
FU National Science Foundation [0099540, 9633750]; US Department of Energy
[DE-AC05-84ER40150]
FX We thank V. Tvaskis for compiling the preliminary data table for Ref.
[15]. This work was supported in part by research grants 0099540 and
9633750 from the National Science Foundation. The Southeastern
Universities Research Association (SURA) operated the Thomas Jefferson
National Accelerator Facility for the US Department of Energy under
Contract No. DE-AC05-84ER40150.
NR 20
TC 67
Z9 67
U1 1
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 055213
DI 10.1103/PhysRevC.81.055213
PG 8
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800068
ER
PT J
AU Coman, M
Markowitz, P
Aniol, KA
Baker, K
Boeglin, WU
Breuer, H
Bydzovsky, P
Camsonne, A
Cha, J
Chang, CC
Chant, N
Chen, JP
Chudakov, EA
Cisbani, E
Cole, L
Cusanno, F
de Jager, CW
De Leo, R
Deur, AP
Dieterich, S
Dohrmann, F
Dutta, D
Ent, R
Filoti, O
Fissum, K
Frullani, S
Garibaldi, F
Gayou, O
Gilman, F
Gomez, J
Gueye, P
Hansen, JO
Higinbotham, DW
Hinton, W
Horn, T
Hu, B
Huber, GM
Iodice, M
Jackson, C
Jiang, X
Jones, M
Kanda, K
Keppel, C
King, P
Klein, F
Kozlov, K
Kramer, K
Kramer, L
Lagamba, L
LeRose, JJ
Liyanage, N
Margaziotis, DJ
Marrone, S
McCormick, K
Michaels, RW
Mitchell, J
Miyoshi, T
Nanda, S
Palomba, M
Pattichio, V
Perdrisat, CF
Piasetzky, E
Punjabi, VA
Raue, B
Reinhold, J
Reitz, B
Roche, RE
Roos, P
Saha, A
Sarty, AJ
Sato, Y
Sirca, S
Sotona, M
Tang, L
Ueno, H
Ulmer, PE
Urciuoli, GM
Uzzle, A
Vacheret, A
Wang, K
Wijesooriya, K
Wojtsekhowski, B
Wood, S
Yaron, I
Zheng, X
Zhu, L
AF Coman, M.
Markowitz, P.
Aniol, K. A.
Baker, K.
Boeglin, W. U.
Breuer, H.
Bydzovsky, P.
Camsonne, A.
Cha, J.
Chang, C. C.
Chant, N.
Chen, J-P.
Chudakov, E. A.
Cisbani, E.
Cole, L.
Cusanno, F.
de Jager, C. W.
De Leo, R.
Deur, A. P.
Dieterich, S.
Dohrmann, F.
Dutta, D.
Ent, R.
Filoti, O.
Fissum, K.
Frullani, S.
Garibaldi, F.
Gayou, O.
Gilman, F.
Gomez, J.
Gueye, P.
Hansen, J. O.
Higinbotham, D. W.
Hinton, W.
Horn, T.
Hu, B.
Huber, G. M.
Iodice, M.
Jackson, C.
Jiang, X.
Jones, M.
Kanda, K.
Keppel, C.
King, P.
Klein, F.
Kozlov, K.
Kramer, K.
Kramer, L.
Lagamba, L.
LeRose, J. J.
Liyanage, N.
Margaziotis, D. J.
Marrone, S.
McCormick, K.
Michaels, R. W.
Mitchell, J.
Miyoshi, T.
Nanda, S.
Palomba, M.
Pattichio, V.
Perdrisat, C. F.
Piasetzky, E.
Punjabi, V. A.
Raue, B.
Reinhold, J.
Reitz, B.
Roche, R. E.
Roos, P.
Saha, A.
Sarty, A. J.
Sato, Y.
Sirca, S.
Sotona, M.
Tang, L.
Ueno, H.
Ulmer, P. E.
Urciuoli, G. M.
Uzzle, A.
Vacheret, A.
Wang, K.
Wijesooriya, K.
Wojtsekhowski, B.
Wood, S.
Yaron, I.
Zheng, X.
Zhu, L.
CA Jefferson Lab Hall Collaboration
TI Cross sections and Rosenbluth separations in H-1(e, e ' K+)Lambda up to
Q(2)=2.35 GeV2
SO PHYSICAL REVIEW C
LA English
DT Article
ID ELECTROMAGNETIC PRODUCTION; HALL-A; PHOTOPRODUCTION; STRANGENESS;
K&LAMBDA; REGION
AB The kaon electroproduction reaction H-1(e, e ' K+)Lambda was studied as a function of the virtual-photon four-momentum, Q(2), total energy, W, and momentum transfer, t, for different values of the virtual-photon polarization parameter. Data were taken at electron beam energies ranging from 3.40 to 5.75 GeV. The center of mass cross section was determined for twenty-one kinematics corresponding to Q(2) of 1.90 and 2.35 GeV2, and the longitudinal, sigma(L), and transverse, sigma(T), cross sections were separated using the Rosenbluth technique at fixed W and t. The separated cross sections reveal a flat energy dependence at forward kaon angles not satisfactorily described by existing electroproduction models. Influence of the kaon pole on the cross sections was investigated by adopting an off-shell form factor in the Regge model, which better describes the observed energy dependence of sigma(T) and sigma(L).
C1 [Aniol, K. A.; Margaziotis, D. J.] Calif State Univ Los Angeles, Los Angeles, CA 90032 USA.
[Baker, K.; Cha, J.; Gueye, P.; Hinton, W.; Jackson, C.; Keppel, C.; Tang, L.] Hampton Univ, Hampton, VA 23668 USA.
[Breuer, H.; Chang, C. C.; Chant, N.; Cole, L.; Horn, T.; King, P.; Roos, P.] Univ Maryland, College Pk, MD 20742 USA.
[Bydzovsky, P.; Sotona, M.] Inst Nucl Phys, Rez Near Prague, Czech Republic.
[Camsonne, A.] Univ Clermont Ferrand, IN2P3, F-63177 Aubiere, France.
[Chen, J-P.; Chudakov, E. A.; de Jager, C. W.; Ent, R.; Gomez, J.; Hansen, J. O.; Higinbotham, D. W.; LeRose, J. J.; Liyanage, N.; Michaels, R. W.; Mitchell, J.; Nanda, S.; Reitz, B.; Saha, A.; Wojtsekhowski, B.; Wood, S.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
[Filoti, O.; Frullani, S.; Garibaldi, F.] Ist Nazl Fis Nucl, Sez Roma1, Grp Collegato Sanita, I-00161 Rome, Italy.
[De Leo, R.; Lagamba, L.; Marrone, S.; Palomba, M.; Pattichio, V.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[De Leo, R.; Lagamba, L.; Marrone, S.; Palomba, M.; Pattichio, V.] Univ Bari, I-70126 Bari, Italy.
[Deur, A. P.; Wang, K.] Univ Virginia, Charlottesville, VA 22904 USA.
[Dieterich, S.; Gilman, F.; Jiang, X.; McCormick, K.] Rutgers State Univ, Piscataway, NJ 08855 USA.
[Dohrmann, F.; Wijesooriya, K.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Dutta, D.; Fissum, K.; Gayou, O.; Sirca, S.; Zheng, X.; Zhu, L.] MIT, Cambridge, MA 02139 USA.
[Coman, M.; Markowitz, P.; Boeglin, W. U.; Klein, F.; Kramer, L.; Raue, B.; Reinhold, J.] Florida Int Univ, Miami, FL 33199 USA.
[Hu, B.; Huber, G. M.; Kozlov, K.] Univ Regina, Regina, SK S4S 0A2, Canada.
[Filoti, O.; Frullani, S.; Garibaldi, F.] Ist Super Sanita, I-00161 Rome, Italy.
[Iodice, M.] Ist Nazl Fis Nucl, Sez Roma Tre, I-00146 Rome, Italy.
[Jones, M.; Kramer, K.; Perdrisat, C. F.] Coll William & Mary, Williamsburg, VA 23187 USA.
[Kanda, K.; Miyoshi, T.; Sato, Y.] Tohoku Univ, Sendai, Miyagi 9808578, Japan.
[Piasetzky, E.; Yaron, I.] Tel Aviv Univ, Sch Phys & Astron, Sackler Fac Exact Sci, IL-69978 Tel Aviv, Israel.
[Punjabi, V. A.] Norfolk State Univ, Norfolk, VA 23504 USA.
Florida State Univ, Tallahassee, FL 32306 USA.
[Roche, R. E.; Sarty, A. J.] Florida State Univ, Tallahassee, FL 32306 USA.
[Ueno, H.] Yamagata Univ, Yamagata 9908560, Japan.
[Ulmer, P. E.; Uzzle, A.] Old Dominion Univ, Norfolk, VA 23508 USA.
[Vacheret, A.] CEN Saclay, Daphnia SPhN, F-91191 Gif Sur Yvette, France.
RP Coman, M (reprint author), Florida Int Univ, Miami, FL 33199 USA.
RI Cisbani, Evaristo/C-9249-2011; Sarty, Adam/G-2948-2014; Bydzovsky,
Petr/G-8600-2014; Higinbotham, Douglas/J-9394-2014
OI Cisbani, Evaristo/0000-0002-6774-8473; Higinbotham,
Douglas/0000-0003-2758-6526
FU US Department of Energy [DE-AC05-84ER40150, DE-AC02-06CH11357,
DE-FG02-99ER41065, DE-AC02-98-CH10886]; Italian Istituto Nazionale di
Fisica Nucleare; Czech Republic [202/08/0984]
FX We acknowledge the Jefferson Lab physics and accelerator division staff
for the outstanding efforts that made this work possible. This work was
supported by US Department of Energy Contract DE-AC05-84ER40150, mod.
nr. 175, under which the Southeastern Universities Research Association
(SURA) operates the Thomas Jefferson National Accelerator Facility, by
the Italian Istituto Nazionale di Fisica Nucleare, by the Grant Agency
of the Czech Republic under Grant No. 202/08/0984, and by the US
Department of Energy under Contracts DE-AC02-06CH11357,
DE-FG02-99ER41065, and DE-AC02-98-CH10886.
NR 22
TC 12
Z9 12
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9985
EI 2469-9993
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 052201
DI 10.1103/PhysRevC.81.052201
PG 5
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800008
ER
PT J
AU Dracoulis, GD
Lane, GJ
Kondev, FG
Watanabe, H
Seweryniak, D
Zhu, S
Carpenter, MP
Chiara, CJ
Janssens, RVF
Lauritsen, T
Lister, CJ
McCutchan, EA
Stefanescu, I
AF Dracoulis, G. D.
Lane, G. J.
Kondev, F. G.
Watanabe, H.
Seweryniak, D.
Zhu, S.
Carpenter, M. P.
Chiara, C. J.
Janssens, R. V. F.
Lauritsen, T.
Lister, C. J.
McCutchan, E. A.
Stefanescu, I.
TI Two-quasiparticle structures and isomers in Er-168, Er-170, and Er-172
SO PHYSICAL REVIEW C
LA English
DT Article
ID GAMMA-GAMMA-COINCIDENCES; QUASI-PARTICLE STATES; ROTATIONAL BANDS;
INTRINSIC STATES; HF-178; TRANSITIONS; COLLISIONS; ISOTOPES; NUCLEI; RAY
AB The stable and neutron-rich isotopes Er-168, Er-170, and Er-172 have been studied with Gammasphere using inelastic excitation with energetic Xe-136 beams. The previously assigned structures based on the proposed K-pi = 4(-) isomeric intrinsic states in both Er-168 and Er-170 have been re-evaluated and an equivalent band identified in Er-172. In Er-170, the identification of a K-pi = 6(-) band with transitions close in energy to those of the 4(-) band leads to a modified interpretation, since the overlap would have compromised previous analyses. The g(K) - g(R) values for the 4(-) bands deduced from the in-band gamma-ray intensities for the sequence of isotopes suggest a predominantly two-neutron configuration in Er-168, an equally mixed two-neutron, two-proton configuration in Er-170, and a two-proton configuration in Er-172. A comprehensive decay scheme for the previously proposed 6(+) isomer in Er-172 has also been established, as well as band structures built on this isomer that closely resemble the 6(+) and 7(-) two-neutron structures known in the isotone Yb-174. The implied K hindrances are discussed. The main decay path of the 6(+) isomer occurs through the newly identified 4(-) isomer. The measured lifetimes of the 4(-) and 6(+) isomers in Er-172 are 57(3) and 822(90) ns, respectively. Multiquasiparticle calculations support the suggested configuration changes across the isotopic chain.
C1 [Dracoulis, G. D.; Lane, G. J.] Australian Natl Univ, Dept Nucl Phys, RSPE, Canberra, ACT 0200, Australia.
[Kondev, F. G.; Chiara, C. J.] Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA.
[Watanabe, H.] RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
[Seweryniak, D.; Zhu, S.; Carpenter, M. P.; Janssens, R. V. F.; Lauritsen, T.; Lister, C. J.; McCutchan, E. A.; Stefanescu, I.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
[Stefanescu, I.] Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA.
RP Dracoulis, GD (reprint author), Australian Natl Univ, Dept Nucl Phys, RSPE, Canberra, ACT 0200, Australia.
EM george.dracoulis@anu.edu.au
RI Lane, Gregory/A-7570-2011; Carpenter, Michael/E-4287-2015
OI Lane, Gregory/0000-0003-2244-182X; Carpenter,
Michael/0000-0002-3237-5734
FU Australian Research Council [DP0986725]; US Department of Energy, Office
of Nuclear Physics [DE-AC02-06CH11357, DE-FG02-94ER40848]
FX The authors thank R. B. Turkentine for producing the target and the
staff of the ATLAS accelerator facility for their assistance in various
phases of the experiment. This work is supported by the Australian
Research Council Discovery program (DP0986725) and the US Department of
Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357
and Grant No. DE-FG02-94ER40848.
NR 33
TC 15
Z9 16
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 054313
DI 10.1103/PhysRevC.81.054313
PG 13
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800024
ER
PT J
AU Gade, A
Janssens, RVF
Baugher, T
Bazin, D
Brown, BA
Carpenter, MP
Chiara, CJ
Deacon, AN
Freeman, SJ
Grinyer, GF
Hoffman, CR
Kay, BP
Kondev, FG
Lauritsen, T
McDaniel, S
Meierbachtol, K
Ratkiewicz, A
Stroberg, SR
Walsh, KA
Weisshaar, D
Winkler, R
Zhu, S
AF Gade, A.
Janssens, R. V. F.
Baugher, T.
Bazin, D.
Brown, B. A.
Carpenter, M. P.
Chiara, C. J.
Deacon, A. N.
Freeman, S. J.
Grinyer, G. F.
Hoffman, C. R.
Kay, B. P.
Kondev, F. G.
Lauritsen, T.
McDaniel, S.
Meierbachtol, K.
Ratkiewicz, A.
Stroberg, S. R.
Walsh, K. A.
Weisshaar, D.
Winkler, R.
Zhu, S.
TI Collectivity at N=40 in neutron-rich Cr-64
SO PHYSICAL REVIEW C
LA English
DT Article
ID SHELL-MODEL; NUCLEI; SPECTROSCOPY; DEFORMATION; ISOTOPES; BEAMS
AB Be-9-induced inelastic scattering of Fe-62,Fe-64,Fe-66 and Cr-60,Cr-62,Cr-64 was performed at intermediate beam energies. Excited states in Cr-64 were measured for the first time. Energies and population patterns of excited states in these neutron-rich Fe and Cr nuclei are compared and interpreted in the framework of large-scale shell-model calculations in different model spaces. Evidence for increased collectivity and for distinct structural changes between the neighboring Fe and Cr isotopic chains near N = 40 is presented.
C1 [Gade, A.; Baugher, T.; Bazin, D.; Brown, B. A.; Grinyer, G. F.; McDaniel, S.; Meierbachtol, K.; Ratkiewicz, A.; Stroberg, S. R.; Walsh, K. A.; Weisshaar, D.; Winkler, R.] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA.
[Gade, A.; Baugher, T.; Brown, B. A.; McDaniel, S.; Ratkiewicz, A.; Stroberg, S. R.; Walsh, K. A.] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA.
[Janssens, R. V. F.; Carpenter, M. P.; Chiara, C. J.; Hoffman, C. R.; Kay, B. P.; Lauritsen, T.; Zhu, S.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
[Chiara, C. J.] Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA.
[Deacon, A. N.; Freeman, S. J.] Univ Manchester, Schuster Lab, Sch Phys & Astron, Manchester M13 9PL, Lancs, England.
[Kondev, F. G.] Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA.
[Meierbachtol, K.] Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA.
RP Gade, A (reprint author), Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA.
RI Gade, Alexandra/A-6850-2008; Kay, Benjamin/F-3291-2011; Freeman,
Sean/B-1280-2010; Carpenter, Michael/E-4287-2015
OI Gade, Alexandra/0000-0001-8825-0976; Kay, Benjamin/0000-0002-7438-0208;
Freeman, Sean/0000-0001-9773-4921; Carpenter,
Michael/0000-0002-3237-5734
FU National Science Foundation [PHY-0606007, PHY-0758099]; US Department of
Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; UK Science and
Technology Facilities Council (STFC)
FX We thank Dr. Kazunari Kaneko and Dr. Yang Sun for providing us with the
numerical results of the Cr and Fe excitation energies from the figures
in Refs. [16,19]. This work was supported by the National Science
Foundation under Grants PHY-0606007 and PHY-0758099; by the US
Department of Energy, Office of Nuclear Physics, under Contract No.
DE-AC02-06CH11357; and by the UK Science and Technology Facilities
Council (STFC).
NR 26
TC 83
Z9 83
U1 1
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 051304
DI 10.1103/PhysRevC.81.051304
PG 4
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800004
ER
PT J
AU Garvey, GT
AF Garvey, Gerald T.
TI Orbital angular momentum in the nucleon
SO PHYSICAL REVIEW C
LA English
DT Article
ID DEEP-INELASTIC-SCATTERING; CHIRAL QUARK-MODEL; PARTON DISTRIBUTIONS;
FLAVOR STRUCTURE; SPIN STRUCTURE; MESON CLOUD; ASYMMETRY; PROTON; SEA;
SU(3)
AB Analysis of the measured value of the integrated (d) over bar-(u) over bar asymmetry (I(fas) = 0.147 +/- 0.027) in the nucleon show it to arise from nucleon fluctuations into baryon plus pion. Requiring angular momentum conservation in these fluctuations shows the associated orbital angular momentum is equal to the value of the flavor asymmetry.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Garvey, GT (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
FU Nuclear Physics Division of the Office Science/DOE
FX The author acknowledges discussions with Bogdan Povh that initiated this
work. The support of the Medium Energy Program in the Nuclear Physics
Division of the Office Science/DOE is also gratefully acknowledged.
NR 31
TC 5
Z9 5
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 055212
DI 10.1103/PhysRevC.81.055212
PG 4
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800067
ER
PT J
AU Goldblum, BL
Prussin, SG
Bernstein, LA
Younes, W
Guttormsen, M
Nyhus, HT
AF Goldblum, B. L.
Prussin, S. G.
Bernstein, L. A.
Younes, W.
Guttormsen, M.
Nyhus, H. T.
TI Surrogate ratio methodology for the indirect determination of neutron
capture cross sections
SO PHYSICAL REVIEW C
LA English
DT Article
ID STATISTICAL GAMMA-DECAY; NUCLEAR; ISOTOPES
AB The relative gamma-decay probabilities of the (162)Dy to (161)Dy and (162)Dy to (164)Dy residual nuclei, produced using light-ion-induced direct reactions, were measured as a function of excitation energy using the CACTUS array at the Oslo Cyclotron Laboratory. The external surrogate ratio method (SRM) was used to convert these relative gamma-decay probabilities into the (161)Dy(n,gamma) cross section in an equivalent neutron energy range of 130-560 keV. The directly measured (161)Dy(n,gamma) cross section, obtained from the Evaluated Nuclear Data Files (ENDF/B-VII.0), was compared to the experimentally determined surrogate (161)Dy(n,gamma) cross section obtained using compound-nucleus pairs with both similar ((162)Dy to (164)Dy) and dissimilar ((162)Dy to (161)Dy) nuclear structures. A gamma-ray energy threshold was identified, based upon pairing gap parameters, that provides a first-order correction to the statistical gamma-ray tagging approach and improves the agreement between the surrogate cross-section data and the evaluated result.
C1 [Goldblum, B. L.; Prussin, S. G.] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA.
[Bernstein, L. A.; Younes, W.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Guttormsen, M.; Nyhus, H. T.] Univ Oslo, Dept Phys, N-0316 Oslo, Norway.
RP Goldblum, BL (reprint author), Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA.
EM bethany@nuc.berkeley.edu
FU University of California, Berkeley; Clare Boothe Luce Foundation; US
Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]
FX This work was supported, in part, by the University of California,
Berkeley, Chancellor's Postdoctoral Program and the Clare Boothe Luce
Foundation and was performed under the auspices of the US Department of
Energy by Lawrence Livermore National Laboratory under Contract
DE-AC52-07NA27344. The Norwegian Research Council (NFR) and Berkeley
Nuclear Research Center (BNRC) are also gratefully acknowledged.
NR 24
TC 7
Z9 8
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 054606
DI 10.1103/PhysRevC.81.054606
PG 7
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800040
ER
PT J
AU Hayes, AC
Kwiatkowski, AA
AF Hayes, A. C.
Kwiatkowski, A. A.
TI Structure of the particle-hole amplitudes in no-core shell model wave
functions
SO PHYSICAL REVIEW C
LA English
DT Article
ID INELASTIC ELECTRON-SCATTERING; LOW-MOMENTUM-TRANSFER; FORM-FACTORS;
EXCITED-STATES; NUCLEI; LI-6; O-16; C-12; C12
AB We study the structure of the no-core shell model wave functions for (6)Li and (12)C by investigating the ground state and first excited state electron scattering charge form factors. In both nuclei, large particle-hole (ph) amplitudes in the wave functions appear with the opposite sign to that needed to reproduce the shape of the (e, e') form factors, the charge radii, and the B(E2) values for the lowest two states. The difference in sign appears to arise mainly from the monopole Delta(h) over bar omega = 2 matrix elements of the kinetic and potential energy (T + V) that transform under the harmonic oscillator SU(3) symmetries as (lambda, mu) = (2, 0). These are difficult to determine self-consistently, but they have a strong effect on the structure of the low-lying states and on the giant monopole and quadrupole resonances. The Lee-Suzuki transformation, used to account for the restricted nature of the space in terms of an effective interaction, introduces large higher-order Delta(h) over bar omega = n, n > 2, ph amplitudes in the wave functions. The latter ph excitations aggravate the disagreement between the experimental and predicted (e, e') form factors with increasing model spaces, especially at high momentum transfers. For sufficiently large model spaces, the situation begins to resolve itself for (6)Li, but the convergence is slow. A prescription to constrain the ph excitations would likely accelerate convergence of the calculations.
C1 [Hayes, A. C.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Kwiatkowski, A. A.] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA.
RP Hayes, AC (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
NR 47
TC 2
Z9 2
U1 0
U2 3
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 054301
DI 10.1103/PhysRevC.81.054301
PG 11
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800012
ER
PT J
AU Johnson, CW
Krastev, PG
AF Johnson, Calvin W.
Krastev, Plamen G.
TI Sensitivity analysis of random two-body interactions
SO PHYSICAL REVIEW C
LA English
DT Article
ID EFFECTIVE-FIELD THEORY; NUCLEAR-STRUCTURE; ORDERLY SPECTRA; SHELL-MODEL;
FORCES; SYSTEMS
AB The input to the configuration-interaction shell model includes many dozens or hundreds of independent two-body matrix elements. Previous studies have shown that when fitting to experimental low-lying spectra, the greatest sensitivity is to only a few linear combinations of matrix elements. Here we consider interactions drawn from the two-body random ensemble and find that the low-lying spectra are also most sensitive to only a few linear combinations of two-body matrix elements, in a fashion nearly indistinguishable from an interaction empirically fit to data. We find in particular the spectra for both random and empirical interactions are sensitive to similar matrix elements, which we analyze using monopole and contact interactions.
C1 [Johnson, Calvin W.; Krastev, Plamen G.] San Diego State Univ, Dept Phys, San Diego, CA 92182 USA.
[Krastev, Plamen G.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Johnson, CW (reprint author), San Diego State Univ, Dept Phys, 5500 Campanile Dr, San Diego, CA 92182 USA.
FU US Department of Energy [DE-FG02-96ER40985, DE-FC02-09ER41587]; Lawrence
Livermore National Laboratory [DE-AC52-07NA27344]
FX The US Department of Energy supported this investigation through
Contract Nos. DE-FG02-96ER40985 and DE-FC02-09ER41587 and through
Subcontract No. B576152 of the Lawrence Livermore National Laboratory
under Contract No. DE-AC52-07NA27344.
NR 29
TC 1
Z9 1
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 054303
DI 10.1103/PhysRevC.81.054303
PG 4
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800014
ER
PT J
AU Liu, SH
Hamilton, JH
Ramayya, AV
Luo, YX
Rasmussen, JO
Hwang, JK
Zhu, SJ
Ma, WC
Daniel, AV
Ter-Akopian, GM
AF Liu, S. H.
Hamilton, J. H.
Ramayya, A. V.
Luo, Y. X.
Rasmussen, J. O.
Hwang, J. K.
Zhu, S. J.
Ma, W. C.
Daniel, A. V.
Ter-Akopian, G. M.
TI Evidence for octupole excitations in the odd-odd neutron-rich nucleus
Cs-142
SO PHYSICAL REVIEW C
LA English
DT Article
ID CS; DEFORMATION; ISOTOPES; FISSION; MOMENTS; CF-252; BANDS; SPINS
AB High-spin states in the neutron-rich nucleus Cs-142 are reinvestigated from a study of the spontaneous fission of Cf-252 with the Gammasphere detector array. A new level scheme is built and spin-parities are assigned to levels based on angular correlation measurements and systematics. The new structure of Cs-142 is proposed to be related to octupole correlations. The electric dipole moment of Cs-142 is measured and a dramatic decrease of the dipole moments with increasing neutron numbers in the Cs isotopic chain is found.
C1 [Liu, S. H.; Hamilton, J. H.; Ramayya, A. V.; Luo, Y. X.; Hwang, J. K.; Daniel, A. V.] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
[Luo, Y. X.; Rasmussen, J. O.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Zhu, S. J.] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China.
[Ma, W. C.] Mississippi State Univ, Dept Phys & Astron, Mississippi State, MS 39762 USA.
[Daniel, A. V.; Ter-Akopian, G. M.] JINR, Flerov Lab Nucl React, Dubna, Russia.
RP Liu, SH (reprint author), Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
FU US Department of Energy [DE-FG05-88ER40407, DE-FG02-95ER40939,
DE-AC03-76SF00098]; National Natural Science Foundation of China
[10775078, 10975082]; Major State Basic Research Development Program
[2007CB815005]
FX The work at Vanderbilt University, Mississippi State University, and
Lawrence Berkeley National Laboratory is supported by the US Department
of Energy under Grant and Contract Nos. DE-FG05-88ER40407,
DE-FG02-95ER40939, and DE-AC03-76SF00098. The work at Tsinghua
University is supported by the National Natural Science Foundation of
China under Grant Nos. 10775078 and 10975082 and by the Major State
Basic Research Development Program under Grant No. 2007CB815005.
NR 29
TC 7
Z9 7
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 057304
DI 10.1103/PhysRevC.81.057304
PG 4
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800085
ER
PT J
AU Mei, DM
Yin, ZB
Spaans, J
Koppang, M
Hime, A
Keller, C
Gehman, VM
AF Mei, D-M.
Yin, Z-B.
Spaans, J.
Koppang, M.
Hime, A.
Keller, C.
Gehman, V. M.
TI Prediction of underground argon content for dark matter experiments
SO PHYSICAL REVIEW C
LA English
DT Article
ID NOBLE-GAS RADIONUCLIDES; LIQUID ARGON; AR-39
AB In this paper, we demonstrate the use of physical models to evaluate the production of (39)Ar and (40)Ar underground. Considering both cosmogenic (39)Ar production and radiogenic (40)Ar production in situ and from external sources, we can derive the ratio of (39)Ar to (40)Ar in underground sources. We show for the first time that the (39)Ar production underground is dominated by stopping negative muon capture on (39)K and (alpha,n) induced subsequent (39)K(n,p) (39)Ar reactions. The production of (39)Ar is shown as a function of depth. We demonstrate that argon depleted in (39)Ar can be obtained only if the depth of the underground resources is greater than 500 m.w.e. below the surface. Stopping negative muon capture on (39)K dominates over radiogenic production at depths of less than 2000 m.w.e., and that production by muon-induced neutrons is subdominant at any depth. The depletion factor depends strongly on both radioactivity level and potassium content in the rock. We measure the radioactivity concentration and potassium concentration in the rock for a potential site of an underground argon source in South Dakota. Depending on the probability of (39)Ar and (40)Ar produced underground being dissolved in the water, the upper limit of the concentration of (39)Ar in the underground water at this site is estimated to be in a range of a factor of 1.6 to 155 less than the (39)Ar concentration in the atmosphere. The calculation tools presented in this paper are also critical to the dating method with (39)Ar.
C1 [Mei, D-M.; Yin, Z-B.; Spaans, J.; Keller, C.] Univ S Dakota, Dept Phys, Vermillion, SD 57069 USA.
[Yin, Z-B.] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
[Koppang, M.] Univ S Dakota, Dept Chem, Vermillion, SD 57069 USA.
[Hime, A.; Gehman, V. M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Mei, DM (reprint author), Univ S Dakota, Dept Phys, Vermillion, SD 57069 USA.
EM dongming.mei@usd.edu
FU National Science Foundation [PHY-0758120]; Office of Research at
University of South Dakota; Laboratory Directed Research and Development
at Los Alamos National Laboratory; South Dakota Space Grant Consortium;
Ministry of Education of China [IRT0624]; National Science Foundation of
China [10635020, 10975061]
FX The authors thank Cristiano Galbiati for a careful reading of this
manuscript. This work was supported in part by National Science
Foundation (Grant No. PHY-0758120) and the Office of Research at
University of South Dakota as well as by Laboratory Directed Research
and Development at Los Alamos National Laboratory. J. Spaans was also
partially supported by the South Dakota Space Grant Consortium. Z.Y. was
also partly supported by Ministry of Education of China under Project
No. IRT0624 and the National Science Foundation of China under Grant No.
10635020 and 10975061.
NR 31
TC 5
Z9 5
U1 1
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 055802
DI 10.1103/PhysRevC.81.055802
PG 7
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800075
ER
PT J
AU Nair, C
Junghans, AR
Erhard, M
Bemmerer, D
Beyer, R
Grosse, E
Kosev, K
Marta, M
Rusev, G
Schilling, KD
Schwengner, R
Wagner, A
AF Nair, C.
Junghans, A. R.
Erhard, M.
Bemmerer, D.
Beyer, R.
Grosse, E.
Kosev, K.
Marta, M.
Rusev, G.
Schilling, K. D.
Schwengner, R.
Wagner, A.
TI Dipole strength in Sm-144 studied via (gamma,n), (gamma,p), and
(gamma,alpha) reactions
SO PHYSICAL REVIEW C
LA English
DT Article
ID PHOTONEUTRON CROSS-SECTIONS; ELECTRON-ACCELERATOR ELBE; RESONANCE
NEUTRON-CAPTURE; P-PROCESS NUCLEOSYNTHESIS; HARD-CORE INTERACTION; RAY
SPECTROMETRY; LEVEL DENSITY; FINITE NUCLEI; MODEL; ISOTOPES
AB Photoactivation measurements on Sm-144 have been performed with bremsstrahlung endpoint energies from 10.0 to 15.5 MeV at the bremsstrahlung facility of the superconducting electron accelerator ELBE of Forschungszentrum Dresden-Rossendorf. The measured activation yield for the Sm-144(gamma,n) reaction is compared with the calculated yield using cross sections from previous photoneutron experiments. The activation yields measured for all disintegration channels Sm-144(gamma,n), (gamma,p), and (gamma,alpha) are compared to the yield calculated by using Hauser-Feshbach statistical models. A new parametrization of the photon strength function is presented and the yield simulated by using the modified photon strength parameters is compared to the experimental data.
C1 [Nair, C.; Junghans, A. R.; Erhard, M.; Bemmerer, D.; Beyer, R.; Grosse, E.; Kosev, K.; Marta, M.; Rusev, G.; Schilling, K. D.; Schwengner, R.; Wagner, A.] Forschungszentrum Dresden Rossendorf, Inst Strahlenphys, D-01314 Dresden, Germany.
[Grosse, E.] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
RP Nair, C (reprint author), Argonne Natl Lab, Nucl Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Bemmerer, Daniel/C-9092-2013; Junghans, Arnd/D-4596-2012; Wagner,
Andreas/G-3127-2013
OI Bemmerer, Daniel/0000-0003-0470-8367; Wagner,
Andreas/0000-0001-7575-3961
NR 53
TC 19
Z9 19
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9985
EI 2469-9993
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 055806
DI 10.1103/PhysRevC.81.055806
PG 10
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800079
ER
PT J
AU Qian, X
Horn, T
Clasie, B
Arrington, J
Asaturyan, R
Benmokhtar, F
Boeglin, W
Bosted, P
Bruell, A
Christy, ME
Chudakov, E
Dalton, MM
Daniel, A
Day, D
Dutta, D
El Fassi, L
Ent, R
Fenker, HC
Ferrer, J
Fomin, N
Gao, H
Garrow, K
Gaskell, D
Gray, C
Huber, GM
Jones, MK
Kalantarians, N
Keppel, CE
Kramer, K
Li, Y
Liang, Y
Lung, AF
Malace, S
Markowitz, P
Matsumura, A
Meekins, DG
Mertens, T
Miyoshi, T
Mkrtchyan, H
Monson, R
Navasardyan, T
Niculescu, G
Niculescu, I
Okayasu, Y
Opper, AK
Perdrisat, C
Punjabi, V
Rauf, AW
Rodriquez, VM
Rohe, D
Seely, J
Segbefia, E
Smith, GR
Sumihama, M
Tadevosyan, V
Tang, L
Villano, A
Vulcan, WF
Wesselmann, FR
Wood, SA
Yuan, L
Zheng, X
AF Qian, X.
Horn, T.
Clasie, B.
Arrington, J.
Asaturyan, R.
Benmokhtar, F.
Boeglin, W.
Bosted, P.
Bruell, A.
Christy, M. E.
Chudakov, E.
Dalton, M. M.
Daniel, A.
Day, D.
Dutta, D.
El Fassi, L.
Ent, R.
Fenker, H. C.
Ferrer, J.
Fomin, N.
Gao, H.
Garrow, K.
Gaskell, D.
Gray, C.
Huber, G. M.
Jones, M. K.
Kalantarians, N.
Keppel, C. E.
Kramer, K.
Li, Y.
Liang, Y.
Lung, A. F.
Malace, S.
Markowitz, P.
Matsumura, A.
Meekins, D. G.
Mertens, T.
Miyoshi, T.
Mkrtchyan, H.
Monson, R.
Navasardyan, T.
Niculescu, G.
Niculescu, I.
Okayasu, Y.
Opper, A. K.
Perdrisat, C.
Punjabi, V.
Rauf, A. W.
Rodriquez, V. M.
Rohe, D.
Seely, J.
Segbefia, E.
Smith, G. R.
Sumihama, M.
Tadevosyan, V.
Tang, L.
Villano, A.
Vulcan, W. F.
Wesselmann, F. R.
Wood, S. A.
Yuan, L.
Zheng, X.
TI Experimental study of the A(e,e 'pi(+)) reaction on H-1, H-2, C-12,
Al-27, Cu-63, and Au-197
SO PHYSICAL REVIEW C
LA English
DT Article
ID VIRTUAL COMPTON-SCATTERING; LARGE MOMENTUM-TRANSFER; NUCLEAR
TRANSPARENCY; ELECTRON-SCATTERING; COLOR-TRANSPARENCY;
ELASTIC-SCATTERING; A-DEPENDENCE; ELECTROPRODUCTION; QCD; PIONS
AB Cross sections for the H-1(e,e'pi(+))n process on H-1, H-2, C-12, Al-27, Cu-63, and Au-197 targets were measured at the Thomas Jefferson National Accelerator Facility ( Jefferson Lab) to extract nuclear transparencies. Data were taken from Q(2) = 1.1- 4.7 GeV2 for a fixed center-of-mass energy of W = 2.14 GeV. The ratio of sigma(L) and sigma(T) was extracted from the measured cross sections for H-1, H-2, C-12, and Cu-63 targets at Q(2) = 2.15 and 4.0 GeV2, allowing for additional studies of the reaction mechanism. In this article, we present the experimental setup and the analysis of the data in detail, including systematic uncertainty studies. Differential cross sections and nuclear transparencies as a function of the pion momentum at different values of Q(2) are presented. Our results are consistent with the predicted early onset of color transparency in mesons. Global features of the data are discussed and the data are compared with model calculations for the H-1(e,e'pi(+)) n reaction from nuclear targets.
C1 [Qian, X.; Dutta, D.; Gao, H.; Kramer, K.] Duke Univ, Triangle Univ Nucl Lab, Durham, NC 27706 USA.
[Horn, T.; Benmokhtar, F.] Univ Maryland, College Pk, MD 20742 USA.
[Horn, T.; Bosted, P.; Bruell, A.; Chudakov, E.; Ent, R.; Fenker, H. C.; Gaskell, D.; Jones, M. K.; Keppel, C. E.; Lung, A. F.; Meekins, D. G.; Smith, G. R.; Tang, L.; Vulcan, W. F.; Wood, S. A.] TJNAF, Div Phys, Newport News, VA USA.
[Clasie, B.; Seely, J.] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
[Arrington, J.; El Fassi, L.; Zheng, X.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Asaturyan, R.; Mkrtchyan, H.; Navasardyan, T.; Tadevosyan, V.] Yerevan Phys Inst, Yerevan 375036, Armenia.
[Boeglin, W.; Markowitz, P.] Florida Int Univ, Miami, FL 33199 USA.
[Christy, M. E.; Keppel, C. E.; Malace, S.; Segbefia, E.; Tang, L.; Yuan, L.] Hampton Univ, Hampton, VA 23668 USA.
[Dalton, M. M.; Gray, C.] Univ Witwatersrand, Johannesburg, South Africa.
[Daniel, A.; Kalantarians, N.; Li, Y.; Miyoshi, T.; Rodriquez, V. M.] Univ Houston, Houston, TX USA.
[Day, D.; Fomin, N.] Univ Virginia, Charlottesville, VA USA.
[Dutta, D.] Mississippi State Univ, Mississippi State, MS 39762 USA.
[Ferrer, J.; Niculescu, G.; Niculescu, I.] James Madison Univ, Harrisonburg, VA 22807 USA.
[Garrow, K.] TRIUMF, Vancouver, BC V6T 2A3, Canada.
[Huber, G. M.] Univ Regina, Regina, SK S4S 0A2, Canada.
[Liang, Y.; Opper, A. K.] Ohio Univ, Athens, OH 45701 USA.
[Matsumura, A.; Okayasu, Y.; Sumihama, M.] Tohoku Univ, Sendai, Miyagi 980, Japan.
[Mertens, T.; Rohe, D.] Univ Basel, Basel, Switzerland.
[Monson, R.] Cent Michigan Univ, Mt Pleasant, MI 48859 USA.
[Perdrisat, C.] Coll William & Mary, Williamsburg, VA USA.
[Punjabi, V.; Wesselmann, F. R.] Norfolk State Univ, Norfolk, VA USA.
[Rauf, A. W.] Univ Manitoba, Winnipeg, MB, Canada.
[Villano, A.] Rensselaer Polytech Inst, Troy, NY USA.
RP Qian, X (reprint author), Duke Univ, Triangle Univ Nucl Lab, Durham, NC 27706 USA.
RI Gao, Haiyan/G-2589-2011; Arrington, John/D-1116-2012; Mertens,
Thomas/E-9826-2013; Day, Donal/C-5020-2015; Dalton, Mark/B-5380-2016;
OI Arrington, John/0000-0002-0702-1328; Day, Donal/0000-0001-7126-8934;
Dalton, Mark/0000-0001-9204-7559; Qian, Xin/0000-0002-7903-7935
FU US Department of Energy [DE-AC05-84150]; US National Science Foundation;
Natural Sciences and Engineering Research Council of Canada (NSERC)
FX The authors acknowledge the outstanding support of the Jefferson Lab
Hall C and Accelerator Division scientific and technical staff during
this experiment. This work was supported in part by the US Department of
Energy. The Southeastern Universities Research Association (SURA)
operates the Thomas Jefferson National Accelerator Facility for the
United States Department of Energy under Contract No. DE-AC05-84150. We
acknowledge additional research grants from the US National Science
Foundation and the Natural Sciences and Engineering Research Council of
Canada (NSERC)
NR 73
TC 14
Z9 14
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 055209
DI 10.1103/PhysRevC.81.055209
PG 27
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800064
ER
PT J
AU Reinhard, PG
Nazarewicz, W
AF Reinhard, P-G.
Nazarewicz, W.
TI Information content of a new observable: The case of the nuclear neutron
skin
SO PHYSICAL REVIEW C
LA English
DT Article
ID MEAN-FIELD MODELS; STATE; PARAMETRIZATION; EQUATION; PB-208; RADII
AB We address two questions pertaining to the uniqueness and usefulness of a new observable: (i) Considering the current theoretical knowledge, what novel information does new measurement bring in? (ii) How can new data reduce uncertainties of current theoretical models? We illustrate these points by studying the radius of the neutron distribution of a heavy nucleus, a quantity related to the equation of state for neutron matter that determines properties of nuclei and neutron stars. By systematically varying the parameters of two theoretical models and studying the resulting confidence ellipsoid, we quantify the relationships between the neutron skin and various properties of finite nuclei and infinite nuclear matter. Using the covariance analysis, we identify observables and pseudo-observables that correlate, and do not correlate, with the neutron skin. By adding the information on the neutron radius to the pool of observables determining the energy functional, we show how precise experimental determination of the neutron radius in (208)Pb would reduce theoretical uncertainties on the neutron matter equation of state.
C1 [Reinhard, P-G.] Univ Erlangen Nurnberg, Inst Theoret Phys 2, D-91058 Erlangen, Germany.
[Nazarewicz, W.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Nazarewicz, W.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
[Nazarewicz, W.] Univ Warsaw, Inst Theoret Phys, PL-00681 Warsaw, Poland.
[Nazarewicz, W.] Univ W Scotland, Sch Sci & Engn, Paisley PA1 2BE, Renfrew, Scotland.
RP Reinhard, PG (reprint author), Univ Erlangen Nurnberg, Inst Theoret Phys 2, Staudtstr 7, D-91058 Erlangen, Germany.
FU BMBF [06 ER 142D]; Office of Nuclear Physics, US Department of Energy
[DE-FG02-96ER40963, DE-FC02-09ER41583]
FX Discussions with M. Bender, P-H. Heenen, C. Horowitz, and W. Satula are
gratefully acknowledged. This work was supported by BMBF under Contract
06 ER 142D and by the Office of Nuclear Physics, US Department of
Energy, under Contracts DE-FG02-96ER40963 and DE-FC02-09ER41583.
NR 33
TC 185
Z9 186
U1 1
U2 7
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 051303
DI 10.1103/PhysRevC.81.051303
PG 5
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800003
ER
PT J
AU Satula, W
Dobaczewski, J
Nazarewicz, W
Rafalski, M
AF Satula, W.
Dobaczewski, J.
Nazarewicz, W.
Rafalski, M.
TI Isospin-symmetry restoration within the nuclear density functional
theory: Formalism and applications
SO PHYSICAL REVIEW C
LA English
DT Article
ID HARMONIC-OSCILLATOR BASIS; PROJECTED HARTREE-FOCK; ANGULAR-MOMENTUM
PROJECTION; GROUND-STATE PROPERTIES; SPIN-ORBIT TERM; BAND TERMINATION;
MEAN-FIELD; BOGOLIUBOV CALCULATIONS; BOGOLYUBOV EQUATIONS; SLATER
DETERMINANTS
AB Isospin symmetry of atomic nuclei is explicitly broken by the charge-dependent interactions, primarily the Coulomb force. Within the nuclear density functional theory, isospin is also broken spontaneously. We propose a projection scheme rooted in a Hartree-Fock theory that allows the consistent treatment of isospin breaking in both ground and exited nuclear states. We demonstrate that this scheme is free from spurious divergences plaguing particle-number and angular-momentum restoration approaches. Applications of the new technique include excited high-spin states in medium-mass N = Z nuclei, such as superdeformed bands and many-particle many-hole terminating states. Owing to the large spin polarization and/or high seniority of these states, pairing correlations have been ignored.
C1 [Satula, W.; Dobaczewski, J.; Nazarewicz, W.; Rafalski, M.] Univ Warsaw, Inst Theoret Phys, PL-00681 Warsaw, Poland.
[Dobaczewski, J.] Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
[Nazarewicz, W.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Nazarewicz, W.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RP Satula, W (reprint author), Univ Warsaw, Inst Theoret Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
FU Polish Ministry of Science [N202 328234, N202 239037]; Academy of
Finland; Office of Nuclear Physics, US Department of Energy
[DE-FG02-96ER40963, DE-FC02-09ER41583]; University of Jyvaskyla
FX This work was supported in part by the Polish Ministry of Science under
Contract Nos. N N202 328234 and N N202 239037, Academy of Finland and
University of Jyvaskyla within the FIDIPRO programme, and by the Office
of Nuclear Physics, US Department of Energy under Contract Nos.
DE-FG02-96ER40963 (University of Tennessee) and DE-FC02-09ER41583 (UNEDF
SciDAC Collaboration).
NR 92
TC 20
Z9 20
U1 1
U2 10
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
EI 1089-490X
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 054310
DI 10.1103/PhysRevC.81.054310
PG 12
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800021
ER
PT J
AU Tagliente, G
Milazzo, PM
Fujii, K
Abbondanno, U
Aerts, G
Alvarez, H
Alvarez-Velarde, F
Andriamonje, S
Andrzejewski, J
Audouin, L
Badurek, G
Baumann, P
Becvar, F
Belloni, F
Berthoumieux, E
Bisterzo, S
Calvino, F
Calviani, M
Cano-Ott, D
Capote, R
Carrapico, C
Cennini, P
Chepel, V
Chiaveri, E
Colonna, N
Cortes, G
Couture, A
Cox, J
Dahlfors, M
David, S
Dillmann, I
Domingo-Pardo, C
Dridi, W
Duran, I
Eleftheriadis, C
Embid-Segura, M
Ferrari, A
Ferreira-Marques, R
Furman, W
Gallino, R
Goncalves, I
Gonzalez-Romero, E
Gramegna, F
Guerrero, C
Gunsing, F
Haas, B
Haight, R
Heil, M
Herrera-Martinez, A
Igashira, M
Jericha, E
Kappeler, F
Kadi, Y
Karadimos, D
Karamanis, D
Kerveno, M
Kossionides, E
Krticka, M
Lamboudis, C
Leeb, H
Lindote, A
Lopes, I
Lozano, M
Lukic, S
Marganiec, J
Marrone, S
Martinez, T
Massimi, C
Mastinu, P
Mengoni, A
Moreau, C
Mosconi, M
Neves, F
Oberhummer, H
O'Brien, S
Pancin, J
Papachristodoulou, C
Papadopoulos, C
Paradela, C
Patronis, N
Pavlik, A
Pavlopoulos, P
Perrot, L
Pigni, MT
Plag, R
Plompen, A
Plukis, A
Poch, A
Praena, J
Pretel, C
Quesada, J
Rauscher, T
Reifarth, R
Rosetti, M
Rubbia, C
Rudolf, G
Rullhusen, P
Salgado, J
Santos, C
Sarchiapone, L
Savvidis, I
Stephan, C
Tain, JL
Tassan-Got, L
Tavora, L
Terlizzi, R
Vannini, G
Vaz, P
Ventura, A
Villamarin, D
Vincente, MC
Vlachoudis, V
Vlastou, R
Voss, F
Walter, S
Wendler, H
Wiescher, M
Wisshak, K
AF Tagliente, G.
Milazzo, P. M.
Fujii, K.
Abbondanno, U.
Aerts, G.
Alvarez, H.
Alvarez-Velarde, F.
Andriamonje, S.
Andrzejewski, J.
Audouin, L.
Badurek, G.
Baumann, P.
Becvar, F.
Belloni, F.
Berthoumieux, E.
Bisterzo, S.
Calvino, F.
Calviani, M.
Cano-Ott, D.
Capote, R.
Carrapico, C.
Cennini, P.
Chepel, V.
Chiaveri, E.
Colonna, N.
Cortes, G.
Couture, A.
Cox, J.
Dahlfors, M.
David, S.
Dillmann, I.
Domingo-Pardo, C.
Dridi, W.
Duran, I.
Eleftheriadis, C.
Embid-Segura, M.
Ferrari, A.
Ferreira-Marques, R.
Furman, W.
Gallino, R.
Goncalves, I.
Gonzalez-Romero, E.
Gramegna, F.
Guerrero, C.
Gunsing, F.
Haas, B.
Haight, R.
Heil, M.
Herrera-Martinez, A.
Igashira, M.
Jericha, E.
Kaeppeler, F.
Kadi, Y.
Karadimos, D.
Karamanis, D.
Kerveno, M.
Kossionides, E.
Krticka, M.
Lamboudis, C.
Leeb, H.
Lindote, A.
Lopes, I.
Lozano, M.
Lukic, S.
Marganiec, J.
Marrone, S.
Martinez, T.
Massimi, C.
Mastinu, P.
Mengoni, A.
Moreau, C.
Mosconi, M.
Neves, F.
Oberhummer, H.
O'Brien, S.
Pancin, J.
Papachristodoulou, C.
Papadopoulos, C.
Paradela, C.
Patronis, N.
Pavlik, A.
Pavlopoulos, P.
Perrot, L.
Pigni, M. T.
Plag, R.
Plompen, A.
Plukis, A.
Poch, A.
Praena, J.
Pretel, C.
Quesada, J.
Rauscher, T.
Reifarth, R.
Rosetti, M.
Rubbia, C.
Rudolf, G.
Rullhusen, P.
Salgado, J.
Santos, C.
Sarchiapone, L.
Savvidis, I.
Stephan, C.
Tain, J. L.
Tassan-Got, L.
Tavora, L.
Terlizzi, R.
Vannini, G.
Vaz, P.
Ventura, A.
Villamarin, D.
Vincente, M. C.
Vlachoudis, V.
Vlastou, R.
Voss, F.
Walter, S.
Wendler, H.
Wiescher, M.
Wisshak, K.
CA N TOF Collaboration
TI The Zr-92(n,gamma) reaction and its implications for stellar
nucleosynthesis
SO PHYSICAL REVIEW C
LA English
DT Article
ID CAPTURE CROSS-SECTIONS; GIANT BRANCH STARS; NEUTRON-CAPTURE; N-TOF;
ENERGY RANGE; ZR ISOTOPES; S-PROCESS; FACILITY; ELEMENTS; CERN
AB Because the relatively small neutron capture cross sections of the zirconium isotopes are difficult to measure, the results of previous measurements are often not adequate for a number of problems in astrophysics and nuclear technology. Therefore, the Zr-92(n,gamma) cross section has been remeasured at the CERN n_TOF facility, providing a set of improved parameters for 44 resonances in the neutron energy range up to 40 keV. With this information the cross-section uncertainties in the keV region could be reduced to 5% as required for s-process nucleosynthesis studies and technological applications.
C1 [Tagliente, G.; Colonna, N.; Marrone, S.; Terlizzi, R.] Ist Nazl Fis Nucl, I-70126 Bari, Italy.
[Tagliente, G.] Univ Ghent, B-9000 Ghent, Belgium.
[Milazzo, P. M.; Fujii, K.; Abbondanno, U.; Belloni, F.; Moreau, C.] Ist Nazl Fis Nucl, Trieste, Italy.
[Aerts, G.; Andriamonje, S.; Berthoumieux, E.; Dridi, W.; Gunsing, F.; Pancin, J.; Perrot, L.; Plukis, A.] CEA Saclay IRFU, Gif Sur Yvette, France.
[Alvarez, H.; Duran, I.; Paradela, C.] Univ Santiago de Compostela, Santiago De Compostela, Galicia, Spain.
[Alvarez-Velarde, F.; Cano-Ott, D.; Embid-Segura, M.; Gonzalez-Romero, E.; Guerrero, C.; Martinez, T.; Villamarin, D.; Vincente, M. C.] Ctr Invest Energet Medioambientales & Technol, Madrid, Spain.
[Andrzejewski, J.; Marganiec, J.] Univ Lodz, PL-90131 Lodz, Poland.
[Audouin, L.; Dillmann, I.; Heil, M.; Kaeppeler, F.; Mosconi, M.; Plag, R.; Voss, F.; Walter, S.; Wisshak, K.] Forschungszentrum Karlsruhe, Inst Kernphys, Karlsruhe, Germany.
[Badurek, G.; Jericha, E.; Leeb, H.; Oberhummer, H.; Pigni, M. T.] Vienna Univ Technol, Atominst, Osterreich Univ, A-1060 Vienna, Austria.
[Baumann, P.; David, S.; Kerveno, M.; Lukic, S.; Rudolf, G.] CNRS, IN2P3, IReS, Strasbourg, France.
[Becvar, F.; Krticka, M.] Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic.
[Bisterzo, S.; Gallino, R.] Univ Turin, Dipartimento Fis Gen, Turin, Italy.
[Calvino, F.; Cortes, G.; Poch, A.; Pretel, C.] Univ Politecn Cataluna, Barcelona, Spain.
[Calviani, M.; Gramegna, F.; Mastinu, P.; Praena, J.] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy.
[Capote, R.; Mengoni, A.] IAEA, NAPC Nucl Data Sect, A-1400 Vienna, Austria.
[Capote, R.; Lozano, M.; Quesada, J.] Univ Seville, Seville, Spain.
[Carrapico, C.; Salgado, J.; Santos, C.; Tavora, L.; Vaz, P.] ITN, Lisbon, Portugal.
[Cennini, P.; Chiaveri, E.; Dahlfors, M.; Ferrari, A.; Herrera-Martinez, A.; Kadi, Y.; Sarchiapone, L.; Vlachoudis, V.; Wendler, H.] CERN, Geneva, Switzerland.
[Chepel, V.; Ferreira-Marques, R.; Goncalves, I.; Lindote, A.; Lopes, I.; Neves, F.] Univ Coimbra, LIP Coimbra, Coimbra, Portugal.
[Chepel, V.; Ferreira-Marques, R.; Goncalves, I.; Lindote, A.; Lopes, I.; Neves, F.] Univ Coimbra, Dept Fis, P-3000 Coimbra, Portugal.
[Couture, A.; Cox, J.; O'Brien, S.; Wiescher, M.] Univ Notre Dame, Notre Dame, IN 46556 USA.
[Domingo-Pardo, C.; Tain, J. L.] Univ Valencia, CSIC, Inst Fis Corpuscular, Valencia, Spain.
[Eleftheriadis, C.; Lamboudis, C.; Savvidis, I.] Aristotle Univ Thessaloniki, GR-54006 Thessaloniki, Greece.
[Furman, W.] Joint Inst Nucl Res, Frank Lab Neutron Phys, Dubna, Russia.
[Haas, B.] CNRS, IN2P3, CENBG, Bordeaux, France.
[Haight, R.; Reifarth, R.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Igashira, M.] Tokyo Inst Technol, Tokyo 152, Japan.
[Karadimos, D.; Karamanis, D.; Papachristodoulou, C.; Patronis, N.] Univ Ioannina, GR-45110 Ioannina, Greece.
[Kossionides, E.] NCSR Demokritos, Athens, Greece.
[Massimi, C.; Vannini, G.] Univ Bologna, Dipartmento Fis, Bologna, Italy.
[Massimi, C.; Vannini, G.] Sez INFN Bologna, Bologna, Italy.
[Papadopoulos, C.; Vlastou, R.] Natl Tech Univ Athens, Athens, Greece.
[Pavlik, A.] Univ Vienna, Inst Fak Phys, Vienna, Austria.
[Pavlopoulos, P.] Pole Univ Leonard de Vinci, Paris, France.
[Plompen, A.; Rullhusen, P.] CEC JRC IRMM, Geel, Belgium.
[Rauscher, T.] Univ Basel, Dept Phys & Astron, Basel, Switzerland.
[Rosetti, M.; Ventura, A.] ENEA, Bologna, Italy.
[Rubbia, C.] Univ Pavia, I-27100 Pavia, Italy.
[Stephan, C.; Tassan-Got, L.] IPN, CNRS, IN2P3, Orsay, France.
RP Tagliente, G (reprint author), Ist Nazl Fis Nucl, I-70126 Bari, Italy.
EM giuseppe.tagliente@ba.infn.it
RI Jericha, Erwin/A-4094-2011; Rauscher, Thomas/D-2086-2009; Neves,
Francisco/H-4744-2013; Goncalves, Isabel/J-6954-2013; Vaz,
Pedro/K-2464-2013; Lopes, Isabel/A-1806-2014; Cortes,
Guillem/B-6869-2014; Becvar, Frantisek/D-3824-2012; Chepel,
Vitaly/H-4538-2012; Ventura, Alberto/B-9584-2011; Lindote,
Alexandre/H-4437-2013; Massimi, Cristian/K-2008-2015; Paradela,
Carlos/J-1492-2012; Calvino, Francisco/K-5743-2014; Mengoni,
Alberto/I-1497-2012; Tain, Jose L./K-2492-2014; Cano Ott,
Daniel/K-4945-2014; Quesada Molina, Jose Manuel/K-5267-2014; Gramegna,
Fabiana/B-1377-2012; Guerrero, Carlos/L-3251-2014; Gonzalez Romero,
Enrique/L-7561-2014; Pretel Sanchez, Carme/L-8287-2014; Martinez,
Trinitario/K-6785-2014; Capote Noy, Roberto/M-1245-2014; Massimi,
Cristian/B-2401-2015; Duran, Ignacio/H-7254-2015; Alvarez Pol,
Hector/F-1930-2011
OI Jericha, Erwin/0000-0002-8663-0526; Rauscher,
Thomas/0000-0002-1266-0642; Neves, Francisco/0000-0003-3635-1083; Vaz,
Pedro/0000-0002-7186-2359; Lopes, Isabel/0000-0003-0419-903X; Ventura,
Alberto/0000-0001-6748-7931; Lindote, Alexandre/0000-0002-7965-807X;
Massimi, Cristian/0000-0003-2499-5586; Calvino,
Francisco/0000-0002-7198-4639; Mengoni, Alberto/0000-0002-2537-0038;
Cano Ott, Daniel/0000-0002-9568-7508; Quesada Molina, Jose
Manuel/0000-0002-2038-2814; Gramegna, Fabiana/0000-0001-6112-0602;
Guerrero, Carlos/0000-0002-2111-546X; Gonzalez Romero,
Enrique/0000-0003-2376-8920; Martinez, Trinitario/0000-0002-0683-5506;
Capote Noy, Roberto/0000-0002-1799-3438; Massimi,
Cristian/0000-0001-9792-3722; Alvarez Pol, Hector/0000-0001-9643-6252
FU EC [FIKW-CT-2000-00107]
FX This work was supported by the EC under Contract No. FIKW-CT-2000-00107
and by the funding agencies of the participating institutes.
NR 40
TC 20
Z9 20
U1 2
U2 14
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 055801
DI 10.1103/PhysRevC.81.055801
PG 9
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800074
ER
PT J
AU Tvaskis, V
Arrington, J
Asaturyan, R
Baker, OK
Blok, HP
Bosted, P
Boswell, M
Bruell, A
Christy, ME
Cochran, A
Ent, R
Filippone, BW
Gasparian, A
Keppel, CE
Kinney, E
Lapikas, L
Lorenzon, W
Mack, DJ
Mammei, J
Martin, JW
Mkrtchyan, H
Niculescu, I
Piercey, RB
Potterveld, DH
Smith, G
Spurlock, K
van der Steenhoven, G
Stepanyan, S
Tadevosian, V
Wood, SA
AF Tvaskis, V.
Arrington, J.
Asaturyan, R.
Baker, O. K.
Blok, H. P.
Bosted, P.
Boswell, M.
Bruell, A.
Christy, M. E.
Cochran, A.
Ent, R.
Filippone, B. W.
Gasparian, A.
Keppel, C. E.
Kinney, E.
Lapikas, L.
Lorenzon, W.
Mack, D. J.
Mammei, J.
Martin, J. W.
Mkrtchyan, H.
Niculescu, I.
Piercey, R. B.
Potterveld, D. H.
Smith, G.
Spurlock, K.
van der Steenhoven, G.
Stepanyan, S.
Tadevosian, V.
Wood, S. A.
TI Proton and deuteron F-2 structure function at low Q(2)
SO PHYSICAL REVIEW C
LA English
DT Article
ID STRUCTURE-FUNCTION F-2(X,Q(2)); HIGH STATISTICS MEASUREMENT; INELASTIC
MUON SCATTERING; R=SIGMA-L/SIGMA-T; ELECTROMAGNETIC CORRECTIONS; HIGH
Q2; HERA; SIGMA(L)/SIGMA(T); PHYSICS; REGION
AB Measurements of the proton and deuteron F-2 structure functions are presented. The data, taken at Jefferson Lab Hall C, span the four-momentum transfer range 0.06 < Q(2) < 2.8 GeV2 and Bjorken x values from 0.009 to 0.45, thus extending the knowledge of F-2 to low values of Q(2) at low x. Next-to-next-to-leading-order calculations using recent parton distribution functions start to deviate from the data for Q(2) < 2 GeV2 at the low and high x values. Down to the lowest value of Q(2), the structure function is in good agreement with a parametrization of F-2 based on data that have been taken at much higher values of Q(2) or much lower values of x, and which are constrained by data at the photon point. The ratio of the deuteron and proton structure functions at low x remains well described by a logarithmic dependence on Q(2) at low Q(2).
C1 [Tvaskis, V.; Blok, H. P.] Vrije Univ Amsterdam, NL-1081 HV Amsterdam, Netherlands.
[Tvaskis, V.; Blok, H. P.; Lapikas, L.; van der Steenhoven, G.] Natl Inst Subatom Phys Nikhef, NL-1009 DB Amsterdam, Netherlands.
[Tvaskis, V.; Baker, O. K.; Christy, M. E.; Cochran, A.; Gasparian, A.; Keppel, C. E.] Hampton Univ, Hampton, VA 23668 USA.
[Arrington, J.; Potterveld, D. H.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Asaturyan, R.; Mkrtchyan, H.; Stepanyan, S.; Tadevosian, V.] Yerevan Phys Inst, Yerevan 375036, Armenia.
[Bosted, P.; Ent, R.; Keppel, C. E.; Mack, D. J.; Smith, G.; Wood, S. A.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
[Boswell, M.] Randolph Macon Womans Coll, Lynchburg, VA 24503 USA.
[Bruell, A.] MIT, Cambridge, MA 02139 USA.
[Filippone, B. W.; Martin, J. W.] CALTECH, Pasadena, CA 91125 USA.
[Kinney, E.] Univ Colorado, Boulder, CO 80309 USA.
[Lorenzon, W.] Univ Michigan, Ann Arbor, MI 48109 USA.
[Mammei, J.] Juniata Coll, Huntingdon, PA 16652 USA.
[Niculescu, I.] George Washington Univ, Washington, DC 20052 USA.
[Piercey, R. B.; Spurlock, K.] Mississippi State Univ, Mississippi State, MS 39762 USA.
RP Tvaskis, V (reprint author), Vrije Univ Amsterdam, NL-1081 HV Amsterdam, Netherlands.
RI Arrington, John/D-1116-2012
OI Arrington, John/0000-0002-0702-1328
FU US Department of Energy [DEAC05-84ER40150]; US National Science
Foundation; Stichting voor Fundamenteel Onderzoek der Materie (FOM) of
the Netherlands
FX This work is supported in part by research grants from the US Department
of Energy, the US National Science Foundation, and the Stichting voor
Fundamenteel Onderzoek der Materie (FOM) of the Netherlands. The
Southeastern Universities Research Association operates the Thomas
Jefferson National Accelerator Facility under the US Department of
Energy Contract No. DEAC05-84ER40150.
NR 35
TC 4
Z9 4
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 055207
DI 10.1103/PhysRevC.81.055207
PG 7
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800062
ER
PT J
AU Wrede, C
Clark, JA
Deibel, CM
Faestermann, T
Hertenberger, R
Parikh, A
Wirth, HF
Bishop, S
Chen, AA
Eppinger, K
Garcia, A
Krucken, R
Lepyoshkina, O
Rugel, G
Setoodehnia, K
AF Wrede, C.
Clark, J. A.
Deibel, C. M.
Faestermann, T.
Hertenberger, R.
Parikh, A.
Wirth, H-F.
Bishop, S.
Chen, A. A.
Eppinger, K.
Garcia, A.
Kruecken, R.
Lepyoshkina, O.
Rugel, G.
Setoodehnia, K.
TI Toward precise Q(EC) values for the superallowed 0(+) -> 0(+) beta
decays of T=2 nuclides: The masses of Na-20, Al-24, P-28, and Cl-32
SO PHYSICAL REVIEW C
LA English
DT Article
ID DELAYED PROTON-DECAY; ENERGY-LEVELS; THRESHOLD; EQUATION; NUCLEUS;
CA-36; SPECTROSCOPY; CALIBRATION; GAMMA; AR-32
AB High-precision measurements of superallowed 0(+) -> 0(+) beta decays of T = 2 nuclides such as Mg-20, Si-24, S-28, and Ar-32 can contribute to searches for physics beyond the standard model of particle physics if the Q(EC) values are accurate to a few keV or better. As a step toward providing precise Q(EC) values for these decays, the ground-state masses of the respective daughter nuclei Na-20, Al-24, P-28, and Cl-32 have been determined by measuring the (He-3,t) reactions leading to them with the Ar-36(He-3,t)K-36 reaction as a calibration. A quadrupole-dipole-dipole-dipole (Q3D) magnetic spectrograph was used together with thin ion-implanted carbon-foil targets of Ne-20, Mg-24, Si-28, S-32, and Ar-36. The masses of Na-20 and Cl-32 are found to be in good agreement with the values from the 2003 Atomic Mass Evaluation (AME03) [G. Audi, A. H. Wapstra, and C. Thibault, Nucl. Phys. A 729, 337 (2003)], and the precision has been improved by a factor of 6 in both cases. The masses of Al-24 and P-28 are found to be higher than the values from AME03 by 9.5 keV (3.2 sigma) and 11.5 keV (3.6 sigma), respectively, and the precision has been improved by a factor of 2.5 in both cases. The new Cl-32 mass is used together with the excitation energy of its lowest T = 2 level and the mass of Ar-32 to derive an improved superallowed Q(EC) value of 6087.3(22) keV for this case. The effects on quantities related to standard-model tests including the beta-nu correlation coefficient a and the isospin-symmetry-breaking correction delta(C) are examined for the A = 32 case.
C1 [Wrede, C.; Garcia, A.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
[Wrede, C.; Clark, J. A.; Deibel, C. M.] Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA.
[Clark, J. A.; Deibel, C. M.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
[Deibel, C. M.] Michigan State Univ, Joint Inst Nucl Astrophys, E Lansing, MI 48824 USA.
[Faestermann, T.; Parikh, A.; Bishop, S.; Eppinger, K.; Kruecken, R.; Lepyoshkina, O.; Rugel, G.] Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany.
[Hertenberger, R.; Wirth, H-F.] Univ Munich, Fak Phys, D-85784 Garching, Germany.
[Chen, A. A.; Setoodehnia, K.] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada.
[Chen, A. A.] Tech Univ Munich, DFG Cluster Excellence Origin & Struct Universe, D-85748 Garching, Germany.
RP Wrede, C (reprint author), Univ Washington, Dept Phys, Seattle, WA 98195 USA.
EM wrede@uw.edu
RI Kruecken, Reiner/A-1640-2013
OI Kruecken, Reiner/0000-0002-2755-8042
FU United States Department of Energy [DE-FG02-91ER40609,
DE-FG0297ER41020]; DFG Cluster of Excellence
FX We gratefully acknowledge the contributions of the accelerator operators
at MLL and WNSL. We thank K. Deryckx, B. M. Freeman, G. C. Harper, A.
Palmer, D. Seiler, D. A. Short, and D. I. Will for contributing to the
preparation of the ion-implanted targets, C. Ugalde for providing the
20Ne target used at WNSL, and P. D. Parker for contributing
to the measurements at WNSL and useful comments on the manuscript. This
work was supported by the United States Department of Energy under
Contract Nos. DE-FG02-91ER40609 and DE-FG0297ER41020, and the DFG
Cluster of Excellence "Origin and Structure of the Universe"
(www.universe-cluster.de).
NR 54
TC 31
Z9 31
U1 0
U2 3
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2010
VL 81
IS 5
AR 055503
DI 10.1103/PhysRevC.81.055503
PG 9
WC Physics, Nuclear
SC Physics
GA 602NA
UT WOS:000278144800071
ER
PT J
AU Aaltonen, T
Adelman, J
Akimoto, T
Gonzalez, BA
Amerio, S
Amidei, D
Anastassov, A
Annovi, A
Antos, J
Apollinari, G
Apresyan, A
Arisawa, T
Artikov, A
Ashmanskas, W
Attal, A
Aurisano, A
Azfar, F
Badgett, W
Barbaro-Galtieri, A
Barnes, VE
Barnett, BA
Barria, P
Bartos, P
Bartsch, V
Bauer, G
Beauchemin, PH
Bedeschi, F
Beecher, D
Behari, S
Bellettini, G
Bellinger, J
Benjamin, D
Beretvas, A
Beringer, J
Bhatti, A
Binkley, M
Bisello, D
Bizjak, I
Blair, RE
Blocker, C
Blumenfeld, B
Bocci, A
Bodek, A
Boisvert, V
Bolla, G
Bortoletto, D
Boudreau, J
Boveia, A
Brau, B
Bridgeman, A
Brigliadori, L
Bromberg, C
Brubaker, E
Budagov, J
Budd, HS
Budd, S
Burke, S
Burkett, K
Busetto, G
Bussey, P
Buzatu, A
Byrum, KL
Cabrera, S
Calancha, C
Campanelli, M
Campbell, M
Canelli, F
Canepa, A
Carls, B
Carlsmith, D
Carosi, R
Carrillo, S
Carron, S
Casal, B
Casarsa, M
Castro, A
Catastini, P
Cauz, D
Cavaliere, V
Cavalli-Sforza, M
Cerri, A
Cerrito, L
Chang, SH
Chen, YC
Chertok, M
Chiarelli, G
Chlachidze, G
Chlebana, F
Cho, K
Chokheli, D
Chou, JP
Choudalakis, G
Chuang, SH
Chung, K
Chung, WH
Chung, YS
Chwalek, T
Ciobanu, CI
Ciocci, M
Clark, A
Clark, D
Compostella, G
Convery, ME
Conway, J
Cordelli, M
Cortiana, G
Cox, CA
Cox, DJ
Crescioli, F
Almenar, CC
Cuevas, J
Culbertson, R
Cully, JC
Dagenhart, D
Datta, M
Davies, T
de Barbaro, P
De Cecco, S
Deisher, A
De Lorenzo, G
Dell'Orso, M
Deluca, C
Demortier, L
Deng, J
Deninno, M
Derwent, PF
Di Canto, A
di Giovanni, GP
Dionisi, C
Di Ruzza, B
Dittmann, JR
D'Onofrio, M
Donati, S
Dong, P
Donini, J
Dorigo, T
Dube, S
Efron, J
Elagin, A
Erbacher, R
Errede, D
Errede, S
Eusebi, R
Fang, HC
Farrington, S
Fedorko, WT
Feild, RG
Feindt, M
Fernandez, JP
Ferrazza, C
Field, R
Flanagan, G
Forrest, R
Frank, MJ
Franklin, M
Freeman, JC
Furic, I
Gallinaro, M
Galyardt, J
Garberson, F
Garcia, JE
Garfinkel, AF
Garosi, P
Genser, K
Gerberich, H
Gerdes, D
Gessler, A
Giagu, S
Giakoumopoulou, V
Giannetti, P
Gibson, K
Gimmell, JL
Ginsburg, CM
Giokaris, N
Giordani, M
Giromini, P
Giunta, M
Giurgiu, G
Glagolev, V
Glenzinski, D
Gold, M
Goldschmidt, N
Golossanov, A
Gomez, G
Gomez-Ceballos, G
Goncharov, M
Gonzalez, O
Gorelov, I
Goshaw, AT
Goulianos, K
Gresele, A
Grinstein, S
Grosso-Pilcher, C
Group, RC
Grundler, U
da Costa, JG
Gunay-Unalan, Z
Haber, C
Hahn, K
Hahn, SR
Halkiadakis, E
Han, BY
Han, JY
Happacher, F
Hara, K
Hare, D
Hare, M
Harper, S
Harr, RF
Harris, RM
Hartz, M
Hatakeyama, K
Hays, C
Heck, M
Heijboer, A
Heinrich, J
Henderson, C
Herndon, M
Heuser, J
Hewamanage, S
Hidas, D
Hill, CS
Hirschbuehl, D
Hocker, A
Hou, S
Houlden, M
Hsu, SC
Huffman, BT
Hughes, RE
Husemann, U
Hussein, M
Huston, J
Incandela, J
Introzzi, G
Iori, M
Ivanov, A
James, E
Jang, D
Jayatilaka, B
Jeon, EJ
Jha, MK
Jindariani, S
Johnson, W
Jones, M
Joo, KK
Jun, SY
Jung, JE
Junk, TR
Kamon, T
Kar, D
Karchin, PE
Kato, Y
Kephart, R
Ketchum, W
Keung, J
Khotilovich, V
Kilminster, B
Kim, DH
Kim, HS
Kim, HW
Kim, JE
Kim, MJ
Kim, SB
Kim, SH
Kim, YK
Kimura, N
Kirsch, L
Klimenko, S
Knuteson, B
Ko, BR
Kondo, K
Kong, DJ
Konigsberg, J
Korytov, A
Kotwal, AV
Kreps, M
Kroll, J
Krop, D
Krumnack, N
Kruse, M
Krutelyov, V
Kubo, T
Kuhr, T
Kulkarni, NP
Kurata, M
Kwang, S
Laasanen, AT
Lami, S
Lammel, S
Lancaster, M
Lander, RL
Lannon, K
Lath, A
Latino, G
Lazzizzera, I
LeCompte, T
Lee, E
Lee, HS
Lee, SW
Leone, S
Lewis, JD
Lin, CS
Linacre, J
Lindgren, M
Lipeles, E
Lister, A
Litvintsev, DO
Liu, C
Liu, T
Lockyer, NS
Loginov, A
Loreti, M
Lovas, L
Lucchesi, D
Luci, C
Lueck, J
Lujan, P
Lukens, P
Lungu, G
Lyons, L
Lys, J
Lysak, R
MacQueen, D
Madrak, R
Maeshima, K
Makhoul, K
Maki, T
Maksimovic, P
Malde, S
Malik, S
Manca, G
Manousakis-Katsikakis, A
Margaroli, F
Marino, C
Marino, CP
Martin, A
Martin, V
Martinez, M
Martinez-Ballarin, R
Maruyama, T
Mastrandrea, P
Masubuchi, T
Mathis, M
Mattson, ME
Mazzanti, P
McFarland, KS
McIntyre, P
McNulty, R
Mehta, A
Mehtala, P
Menzione, A
Merkel, P
Mesropian, C
Miao, T
Miladinovic, N
Miller, R
Mills, C
Milnik, M
Mitra, A
Mitselmakher, G
Miyake, H
Moed, S
Moggi, N
Mondragon, MN
Moon, CS
Moore, R
Morello, MJ
Morlock, J
Fernandez, PM
Mulmenstadt, J
Mukherjee, A
Muller, T
Mumford, R
Murat, P
Mussini, M
Nachtman, J
Nagai, Y
Nagano, A
Naganoma, J
Nakamura, K
Nakano, I
Napier, A
Necula, V
Nett, J
Neu, C
Neubauer, MS
Neubauer, S
Nielsen, J
Nodulman, L
Norman, M
Norniella, O
Nurse, E
Oakes, L
Oh, SH
Oh, YD
Oksuzian, I
Okusawa, T
Orava, R
Osterberg, K
Griso, SP
Pagliarone, C
Palencia, E
Papadimitriou, V
Papaikonomou, A
Paramonov, AA
Parks, B
Pashapour, S
Patrick, J
Pauletta, G
Paulini, M
Paus, C
Peiffer, T
Pellett, DE
Penzo, A
Phillips, TJ
Piacentino, G
Pianori, E
Pinera, L
Pitts, K
Plager, C
Pondrom, L
Poukhov, O
Pounder, N
Prakoshyn, F
Pronko, A
Proudfoot, J
Ptohos, F
Pueschel, E
Punzi, G
Pursley, J
Rademacker, J
Rahaman, A
Ramakrishnan, V
Ranjan, N
Redondo, I
Renton, P
Renz, M
Rescigno, M
Richter, S
Rimondi, F
Ristori, L
Robson, A
Rodrigo, T
Rodriguez, T
Rogers, E
Rolli, S
Roser, R
Rossi, M
Rossin, R
Roy, P
Ruiz, A
Russ, J
Rusu, V
Rutherford, B
Saarikko, H
Safonov, A
Sakumoto, WK
Salto, O
Santi, L
Sarkar, S
Sartori, L
Sato, K
Savoy-Navarro, A
Schlabach, P
Schmidt, A
Schmidt, EE
Schmidt, MA
Schmidt, MP
Schmitt, M
Schwarz, T
Scodellaro, L
Scribano, A
Scuri, F
Sedov, A
Seidel, S
Seiya, Y
Semenov, A
Sexton-Kennedy, L
Sforza, F
Sfyrla, A
Shalhout, SZ
Shears, T
Shepard, PF
Shimojima, M
Shiraishi, S
Shochet, M
Shon, Y
Shreyber, I
Simonenko, A
Sinervo, P
Sisakyan, A
Slaughter, AJ
Slaunwhite, J
Sliwa, K
Smith, JR
Snider, FD
Snihur, R
Soha, A
Somalwar, S
Sorin, V
Spreitzer, T
Squillacioti, P
Stanitzki, M
St Denis, R
Stelzer, B
Stelzer-Chilton, O
Stentz, D
Strologas, J
Strycker, GL
Suh, JS
Sukhanov, A
Suslov, I
Suzuki, T
Taffard, A
Takashima, R
Takeuchi, Y
Tanaka, R
Tecchio, M
Teng, PK
Terashi, K
Thom, J
Thompson, AS
Thompson, GA
Thomson, E
Tipton, P
Ttito-Guzman, P
Tkaczyk, S
Toback, D
Tokar, S
Kollefson, K
Tomura, T
Tonelli, D
Torre, S
Torretta, D
Totaro, P
Tourneur, S
Trovato, M
Tsai, SY
Tu, Y
Turini, N
Ukegawa, F
Vallecorsa, S
van Remortel, N
Varganov, A
Vataga, E
Vazquez, F
Velev, G
Vellidis, C
Vidal, M
Vidal, R
Vila, I
Vilar, R
Vine, T
Vogel, M
Volobouev, I
Volpi, G
Wagner, P
Wagner, RG
Wagner, RL
Wagner, W
Wagner-Kuhr, J
Wakisaka, T
Wallny, R
Wang, SM
Warburton, A
Waters, D
Weinberger, M
Weinelt, J
Wester, WC
Whitehouse, B
Whiteson, D
Wicklund, AB
Wicklund, E
Wilbur, S
Williams, G
Williams, HH
Wilson, P
Winer, BL
Wittich, P
Wolbers, S
Wolfe, C
Wright, T
Wu, X
Wurthwein, F
Xie, S
Yagil, A
Yamamoto, K
Yamaoka, J
Yang, UK
Yang, YC
Yao, WM
Yeh, GP
Yi, K
Yoh, J
Yorita, K
Yoshida, T
Yu, GB
Yu, I
Yu, SS
Yun, JC
Zanello, L
Zanetti, A
Zhang, X
Zheng, Y
Zucchelli, S
AF Aaltonen, T.
Adelman, J.
Akimoto, T.
Alvarez Gonzalez, B.
Amerio, S.
Amidei, D.
Anastassov, A.
Annovi, A.
Antos, J.
Apollinari, G.
Apresyan, A.
Arisawa, T.
Artikov, A.
Ashmanskas, W.
Attal, A.
Aurisano, A.
Azfar, F.
Badgett, W.
Barbaro-Galtieri, A.
Barnes, V. E.
Barnett, B. A.
Barria, P.
Bartos, P.
Bartsch, V.
Bauer, G.
Beauchemin, P. -H.
Bedeschi, F.
Beecher, D.
Behari, S.
Bellettini, G.
Bellinger, J.
Benjamin, D.
Beretvas, A.
Beringer, J.
Bhatti, A.
Binkley, M.
Bisello, D.
Bizjak, I.
Blair, R. E.
Blocker, C.
Blumenfeld, B.
Bocci, A.
Bodek, A.
Boisvert, V.
Bolla, G.
Bortoletto, D.
Boudreau, J.
Boveia, A.
Brau, B.
Bridgeman, A.
Brigliadori, L.
Bromberg, C.
Brubaker, E.
Budagov, J.
Budd, H. S.
Budd, S.
Burke, S.
Burkett, K.
Busetto, G.
Bussey, P.
Buzatu, A.
Byrum, K. L.
Cabrera, S.
Calancha, C.
Campanelli, M.
Campbell, M.
Canelli, F.
Canepa, A.
Carls, B.
Carlsmith, D.
Carosi, R.
Carrillo, S.
Carron, S.
Casal, B.
Casarsa, M.
Castro, A.
Catastini, P.
Cauz, D.
Cavaliere, V.
Cavalli-Sforza, M.
Cerri, A.
Cerrito, L.
Chang, S. H.
Chen, Y. C.
Chertok, M.
Chiarelli, G.
Chlachidze, G.
Chlebana, F.
Cho, K.
Chokheli, D.
Chou, J. P.
Choudalakis, G.
Chuang, S. H.
Chung, K.
Chung, W. H.
Chung, Y. S.
Chwalek, T.
Ciobanu, C. I.
A. Ciocci, M.
Clark, A.
Clark, D.
Compostella, G.
Convery, M. E.
Conway, J.
Cordelli, M.
Cortiana, G.
Cox, C. A.
Cox, D. J.
Crescioli, F.
Almenar, C. Cuenca
Cuevas, J.
Culbertson, R.
Cully, J. C.
Dagenhart, D.
Datta, M.
Davies, T.
de Barbaro, P.
De Cecco, S.
Deisher, A.
De Lorenzo, G.
Dell'Orso, M.
Deluca, C.
Demortier, L.
Deng, J.
Deninno, M.
Derwent, P. F.
Di Canto, A.
di Giovanni, G. P.
Dionisi, C.
Di Ruzza, B.
Dittmann, J. R.
D'Onofrio, M.
Donati, S.
Dong, P.
Donini, J.
Dorigo, T.
Dube, S.
Efron, J.
Elagin, A.
Erbacher, R.
Errede, D.
Errede, S.
Eusebi, R.
Fang, H. C.
Farrington, S.
Fedorko, W. T.
Feild, R. G.
Feindt, M.
Fernandez, J. P.
Ferrazza, C.
Field, R.
Flanagan, G.
Forrest, R.
Frank, M. J.
Franklin, M.
Freeman, J. C.
Furic, I.
Gallinaro, M.
Galyardt, J.
Garberson, F.
Garcia, J. E.
Garfinkel, A. F.
Garosi, P.
Genser, K.
Gerberich, H.
Gerdes, D.
Gessler, A.
Giagu, S.
Giakoumopoulou, V.
Giannetti, P.
Gibson, K.
Gimmell, J. L.
Ginsburg, C. M.
Giokaris, N.
Giordani, M.
Giromini, P.
Giunta, M.
Giurgiu, G.
Glagolev, V.
Glenzinski, D.
Gold, M.
Goldschmidt, N.
Golossanov, A.
Gomez, G.
Gomez-Ceballos, G.
Goncharov, M.
Gonzalez, O.
Gorelov, I.
Goshaw, A. T.
Goulianos, K.
Gresele, A.
Grinstein, S.
Grosso-Pilcher, C.
Group, R. C.
Grundler, U.
da Costa, J. Guimaraes
Gunay-Unalan, Z.
Haber, C.
Hahn, K.
Hahn, S. R.
Halkiadakis, E.
Han, B. -Y.
Han, J. Y.
Happacher, F.
Hara, K.
Hare, D.
Hare, M.
Harper, S.
Harr, R. F.
Harris, R. M.
Hartz, M.
Hatakeyama, K.
Hays, C.
Heck, M.
Heijboer, A.
Heinrich, J.
Henderson, C.
Herndon, M.
Heuser, J.
Hewamanage, S.
Hidas, D.
Hill, C. S.
Hirschbuehl, D.
Hocker, A.
Hou, S.
Houlden, M.
Hsu, S. -C.
Huffman, B. T.
Hughes, R. E.
Husemann, U.
Hussein, M.
Huston, J.
Incandela, J.
Introzzi, G.
Iori, M.
Ivanov, A.
James, E.
Jang, D.
Jayatilaka, B.
Jeon, E. J.
Jha, M. K.
Jindariani, S.
Johnson, W.
Jones, M.
Joo, K. K.
Jun, S. Y.
Jung, J. E.
Junk, T. R.
Kamon, T.
Kar, D.
Karchin, P. E.
Kato, Y.
Kephart, R.
Ketchum, W.
Keung, J.
Khotilovich, V.
Kilminster, B.
Kim, D. H.
Kim, H. S.
Kim, H. W.
Kim, J. E.
Kim, M. J.
Kim, S. B.
Kim, S. H.
Kim, Y. K.
Kimura, N.
Kirsch, L.
Klimenko, S.
Knuteson, B.
Ko, B. R.
Kondo, K.
Kong, D. J.
Konigsberg, J.
Korytov, A.
Kotwal, A. V.
Kreps, M.
Kroll, J.
Krop, D.
Krumnack, N.
Kruse, M.
Krutelyov, V.
Kubo, T.
Kuhr, T.
Kulkarni, N. P.
Kurata, M.
Kwang, S.
Laasanen, A. T.
Lami, S.
Lammel, S.
Lancaster, M.
Lander, R. L.
Lannon, K.
Lath, A.
Latino, G.
Lazzizzera, I.
LeCompte, T.
Lee, E.
Lee, H. S.
Lee, S. W.
Leone, S.
Lewis, J. D.
Lin, C. -S.
Linacre, J.
Lindgren, M.
Lipeles, E.
Lister, A.
Litvintsev, D. O.
Liu, C.
Liu, T.
Lockyer, N. S.
Loginov, A.
Loreti, M.
Lovas, L.
Lucchesi, D.
Luci, C.
Lueck, J.
Lujan, P.
Lukens, P.
Lungu, G.
Lyons, L.
Lys, J.
Lysak, R.
MacQueen, D.
Madrak, R.
Maeshima, K.
Makhoul, K.
Maki, T.
Maksimovic, P.
Malde, S.
Malik, S.
Manca, G.
Manousakis-Katsikakis, A.
Margaroli, F.
Marino, C.
Marino, C. P.
Martin, A.
Martin, V.
Martinez, M.
Martinez-Ballarin, R.
Maruyama, T.
Mastrandrea, P.
Masubuchi, T.
Mathis, M.
Mattson, M. E.
Mazzanti, P.
McFarland, K. S.
McIntyre, P.
McNulty, R.
Mehta, A.
Mehtala, P.
Menzione, A.
Merkel, P.
Mesropian, C.
Miao, T.
Miladinovic, N.
Miller, R.
Mills, C.
Milnik, M.
Mitra, A.
Mitselmakher, G.
Miyake, H.
Moed, S.
Moggi, N.
Mondragon, M. N.
Moon, C. S.
Moore, R.
Morello, M. J.
Morlock, J.
Fernandez, P. Movilla
Muelmenstaedt, J.
Mukherjee, A.
Muller, Th.
Mumford, R.
Murat, P.
Mussini, M.
Nachtman, J.
Nagai, Y.
Nagano, A.
Naganoma, J.
Nakamura, K.
Nakano, I.
Napier, A.
Necula, V.
Nett, J.
Neu, C.
Neubauer, M. S.
Neubauer, S.
Nielsen, J.
Nodulman, L.
Norman, M.
Norniella, O.
Nurse, E.
Oakes, L.
Oh, S. H.
Oh, Y. D.
Oksuzian, I.
Okusawa, T.
Orava, R.
Osterberg, K.
Griso, S. Pagan
Pagliarone, C.
Palencia, E.
Papadimitriou, V.
Papaikonomou, A.
Paramonov, A. A.
Parks, B.
Pashapour, S.
Patrick, J.
Pauletta, G.
Paulini, M.
Paus, C.
Peiffer, T.
Pellett, D. E.
Penzo, A.
Phillips, T. J.
Piacentino, G.
Pianori, E.
Pinera, L.
Pitts, K.
Plager, C.
Pondrom, L.
Poukhov, O.
Pounder, N.
Prakoshyn, F.
Pronko, A.
Proudfoot, J.
Ptohos, F.
Pueschel, E.
Punzi, G.
Pursley, J.
Rademacker, J.
Rahaman, A.
Ramakrishnan, V.
Ranjan, N.
Redondo, I.
Renton, P.
Renz, M.
Rescigno, M.
Richter, S.
Rimondi, F.
Ristori, L.
Robson, A.
Rodrigo, T.
Rodriguez, T.
Rogers, E.
Rolli, S.
Roser, R.
Rossi, M.
Rossin, R.
Roy, P.
Ruiz, A.
Russ, J.
Rusu, V.
Rutherford, B.
Saarikko, H.
Safonov, A.
Sakumoto, W. K.
Salto, O.
Santi, L.
Sarkar, S.
Sartori, L.
Sato, K.
Savoy-Navarro, A.
Schlabach, P.
Schmidt, A.
Schmidt, E. E.
Schmidt, M. A.
Schmidt, M. P.
Schmitt, M.
Schwarz, T.
Scodellaro, L.
Scribano, A.
Scuri, F.
Sedov, A.
Seidel, S.
Seiya, Y.
Semenov, A.
Sexton-Kennedy, L.
Sforza, F.
Sfyrla, A.
Shalhout, S. Z.
Shears, T.
Shepard, P. F.
Shimojima, M.
Shiraishi, S.
Shochet, M.
Shon, Y.
Shreyber, I.
Simonenko, A.
Sinervo, P.
Sisakyan, A.
Slaughter, A. J.
Slaunwhite, J.
Sliwa, K.
Smith, J. R.
Snider, F. D.
Snihur, R.
Soha, A.
Somalwar, S.
Sorin, V.
Spreitzer, T.
Squillacioti, P.
Stanitzki, M.
St. Denis, R.
Stelzer, B.
Stelzer-Chilton, O.
Stentz, D.
Strologas, J.
Strycker, G. L.
Suh, J. S.
Sukhanov, A.
Suslov, I.
Suzuki, T.
Taffard, A.
Takashima, R.
Takeuchi, Y.
Tanaka, R.
Tecchio, M.
Teng, P. K.
Terashi, K.
Thom, J.
Thompson, A. S.
Thompson, G. A.
Thomson, E.
Tipton, P.
Ttito-Guzman, P.
Tkaczyk, S.
Toback, D.
Tokar, S.
Kollefson, K.
Tomura, T.
Tonelli, D.
Torre, S.
Torretta, D.
Totaro, P.
Tourneur, S.
Trovato, M.
Tsai, S. -Y.
Tu, Y.
Turini, N.
Ukegawa, F.
Vallecorsa, S.
van Remortel, N.
Varganov, A.
Vataga, E.
Vazquez, F.
Velev, G.
Vellidis, C.
Vidal, M.
Vidal, R.
Vila, I.
Vilar, R.
Vine, T.
Vogel, M.
Volobouev, I.
Volpi, G.
Wagner, P.
Wagner, R. G.
Wagner, R. L.
Wagner, W.
Wagner-Kuhr, J.
Wakisaka, T.
Wallny, R.
Wang, S. M.
Warburton, A.
Waters, D.
Weinberger, M.
Weinelt, J.
Wester, W. C., III
Whitehouse, B.
Whiteson, D.
Wicklund, A. B.
Wicklund, E.
Wilbur, S.
Williams, G.
Williams, H. H.
Wilson, P.
Winer, B. L.
Wittich, P.
Wolbers, S.
Wolfe, C.
Wright, T.
Wu, X.
Wuerthwein, F.
Xie, S.
Yagil, A.
Yamamoto, K.
Yamaoka, J.
Yang, U. K.
Yang, Y. C.
Yao, W. M.
Yeh, G. P.
Yi, K.
Yoh, J.
Yorita, K.
Yoshida, T.
Yu, G. B.
Yu, I.
Yu, S. S.
Yun, J. C.
Zanello, L.
Zanetti, A.
Zhang, X.
Zheng, Y.
Zucchelli, S.
CA CDF Collaboration
TI Measurement of the t(t)over-bar production cross section in p(p)over-bar
collisions at root s=1.96 TeV using soft electron b-tagging
SO PHYSICAL REVIEW D
LA English
DT Article
ID COLLIDER DETECTOR; TOP-QUARK; CDF; CALORIMETER; PERFORMANCE; FERMILAB
AB We present a measurement of the top-quark pair-production cross section in p (p) over bar collisions at root s = 1.96 TeV using a data sample corresponding to 1.7 fb(-1) of integrated luminosity collected with the Collider Detector at Fermilab. We reconstruct t (t) over bar events in the lepton + jets channel, consisting of e nu + jets and mu nu + jets final states. The dominant background is the production of W bosons in association with multiple jets. To suppress this background, we identify electrons from the semileptonic decay of heavy-flavor jets ("soft electron tags''). From a sample of 2196 candidate events, we obtain 120 tagged events with a background expectation of 51 +/- 3 events, corresponding to a cross section of sigma(t (t) over bar) = 7.8 +/- 2.4(stat) +/- 1.6(syst) +/- 0.5(lumi) pb. We assume a top-quark mass of 175 GeV/c(2). This is the first measurement of the t (t) over bar cross section with soft electron tags in run II of the Tevatron.
C1 [Aaltonen, T.; Maki, T.; Mehtala, P.; Orava, R.; Osterberg, K.; Saarikko, H.; van Remortel, N.] Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland.
[Aaltonen, T.; Maki, T.; Mehtala, P.; Orava, R.; Osterberg, K.; Saarikko, H.; van Remortel, N.] Helsinki Inst Phys, FIN-00014 Helsinki, Finland.
[Chen, Y. C.; Hou, S.; Martin, V.; Mitra, A.; Teng, P. K.; Tsai, S. -Y.; Wang, S. M.] Acad Sinica, Inst Phys, Taipei 11529, Taiwan.
[Blair, R. E.; Byrum, K. L.; LeCompte, T.; Nodulman, L.; Proudfoot, J.; Wagner, R. G.; Wicklund, A. B.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Giakoumopoulou, V.; Giokaris, N.; Manousakis-Katsikakis, A.; Vellidis, C.] Univ Athens, GR-15771 Athens, Greece.
[Attal, A.; Cavalli-Sforza, M.; De Lorenzo, G.; Deluca, C.; D'Onofrio, M.; Martinez, M.; Salto, O.] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain.
[Dittmann, J. R.; Frank, M. J.; Hewamanage, S.; Krumnack, N.] Baylor Univ, Waco, TX 76798 USA.
[Brigliadori, L.; Castro, A.; Deninno, M.; Jha, M. K.; Mazzanti, P.; Moggi, N.; Mussini, M.; Rimondi, F.; Zucchelli, S.] Ist Nazl Fis Nucl, I-40127 Bologna, Italy.
[Brigliadori, L.; Castro, A.; Mussini, M.; Rimondi, F.; Zucchelli, S.] Univ Bologna, I-40127 Bologna, Italy.
[Blocker, C.; Clark, D.; Kirsch, L.; Miladinovic, N.] Brandeis Univ, Waltham, MA 02254 USA.
[Chertok, M.; Conway, J.; Cox, C. A.; Cox, D. J.; Almenar, C. Cuenca; Erbacher, R.; Forrest, R.; Ivanov, A.; Johnson, W.; Lander, R. L.; Lister, A.; Pellett, D. E.; Schwarz, T.; Smith, J. R.; Soha, A.] Univ Calif Davis, Davis, CA 95616 USA.
[Dong, P.; Plager, C.; Wallny, R.; Zheng, Y.] Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
[Norman, M.; Wuerthwein, F.; Yagil, A.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Boveia, A.; Brau, B.; Garberson, F.; Hill, C. S.; Incandela, J.; Krutelyov, V.; Rossin, R.] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
[Alvarez Gonzalez, B.; Casal, B.; Cuevas, J.; Gomez, G.; Rodrigo, T.; Ruiz, A.; Scodellaro, L.; Vila, I.; Vilar, R.] Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain.
[Galyardt, J.; Jang, D.; Jun, S. Y.; Paulini, M.; Pueschel, E.; Russ, J.] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
[Adelman, J.; Brubaker, E.; Canelli, F.; Fedorko, W. T.; Grosso-Pilcher, C.; Ketchum, W.; Kim, Y. K.; Krop, D.; Kwang, S.; Lee, H. S.; Paramonov, A. A.; Schmidt, M. A.; Shiraishi, S.; Shochet, M.; Wilbur, S.; Wolfe, C.; Yang, U. K.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
[Antos, J.; Bartos, P.; Lovas, L.; Lysak, R.; Tokar, S.] Comenius Univ, Bratislava 84248, Slovakia.
[Antos, J.; Bartos, P.; Lovas, L.; Lysak, R.; Tokar, S.] Slovak Acad Sci, Inst Expt Phys, Kosice 04001, Slovakia.
[Artikov, A.; Budagov, J.; Chokheli, D.; Glagolev, V.; Poukhov, O.; Prakoshyn, F.; Semenov, A.; Simonenko, A.; Sisakyan, A.; Suslov, I.] Joint Inst Nucl Res, RU-141980 Dubna, Russia.
[Benjamin, D.; Bocci, A.; Cabrera, S.; Deng, J.; Goshaw, A. T.; Hidas, D.; Jayatilaka, B.; Ko, B. R.; Kotwal, A. V.; Kruse, M.; Necula, V.; Oh, S. H.; Phillips, T. J.; Yamaoka, J.] Duke Univ, Durham, NC 27708 USA.
[Apollinari, G.; Ashmanskas, W.; Badgett, W.; Beretvas, A.; Binkley, M.; Burke, S.; Burkett, K.; Canelli, F.; Casarsa, M.; Chlachidze, G.; Chlebana, F.; Chung, K.; Convery, M. E.; Culbertson, R.; Dagenhart, D.; Datta, M.; Derwent, P. F.; Eusebi, R.; Freeman, J. C.; Genser, K.; Ginsburg, C. M.; Glenzinski, D.; Golossanov, A.; Group, R. C.; Hahn, S. R.; Harris, R. M.; Hocker, A.; James, E.; Jindariani, S.; Junk, T. R.; Kephart, R.; Kilminster, B.; Lammel, S.; Lewis, J. D.; Lindgren, M.; Litvintsev, D. O.; Liu, T.; Lukens, P.; Madrak, R.; Maeshima, K.; Miao, T.; Mondragon, M. N.; Moore, R.; Fernandez, P. Movilla; Mukherjee, A.; Murat, P.; Nachtman, J.; Palencia, E.; Papadimitriou, V.; Patrick, J.; Pronko, A.; Ptohos, F.; Roser, R.; Rusu, V.; Rutherford, B.; Sato, K.; Schlabach, P.; Schmidt, E. E.; Sexton-Kennedy, L.; Slaughter, A. J.; Snider, F. D.; Thom, J.; Tkaczyk, S.; Tonelli, D.; Torretta, D.; Velev, G.; Vidal, R.; Wagner, R. L.; Wester, W. C., III; Wicklund, E.; Wilson, P.; Wittich, P.; Wolbers, S.; Yeh, G. P.; Yi, K.; Yoh, J.; Yu, S. S.; Yun, J. C.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Carrillo, S.; Field, R.; Furic, I.; Goldschmidt, N.; Kar, D.; Klimenko, S.; Konigsberg, J.; Korytov, A.; Mitselmakher, G.; Oksuzian, I.; Pinera, L.; Sukhanov, A.; Vazquez, F.] Univ Florida, Gainesville, FL 32611 USA.
[Annovi, A.; Cordelli, M.; Giromini, P.; Happacher, F.; Kim, M. J.; Torre, S.] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
[Clark, A.; Garcia, J. E.; Vallecorsa, S.; Wu, X.] Univ Geneva, CH-1211 Geneva 4, Switzerland.
[Bussey, P.; Davies, T.; Martin, V.; Robson, A.; St. Denis, R.; Thompson, A. S.] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland.
Harvard Univ, Cambridge, MA 02138 USA.
[Bridgeman, A.; Budd, S.; Carls, B.; Errede, D.; Errede, S.; Gerberich, H.; Grundler, U.; Marino, C. P.; Neubauer, M. S.; Norniella, O.; Pitts, K.; Rogers, E.; Sfyrla, A.; Taffard, A.; Thompson, G. A.; Zhang, X.] Univ Illinois, Urbana, IL 61801 USA.
[Barnett, B. A.; Behari, S.; Blumenfeld, B.; Giurgiu, G.; Maksimovic, P.; Mathis, M.; Mumford, R.] Johns Hopkins Univ, Baltimore, MD 21218 USA.
[Chwalek, T.; Feindt, M.; Gessler, A.; Heck, M.; Heuser, J.; Hirschbuehl, D.; Kreps, M.; Kuhr, T.; Lueck, J.; Marino, C.; Milnik, M.; Morlock, J.; Muller, Th.; Neubauer, S.; Papaikonomou, A.; Peiffer, T.; Renz, M.; Richter, S.; Schmidt, A.; Wagner, W.; Wagner-Kuhr, J.; Weinelt, J.] Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany.
[Chang, S. H.; Cho, K.; Jeon, E. J.; Joo, K. K.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Kim, H. W.; Kim, J. E.; Kim, S. B.; Kong, D. J.; Moon, C. S.; Oh, Y. D.; Suh, J. S.; Yang, Y. C.; Yu, I.] Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea.
[Chang, S. H.; Cho, K.; Jeon, E. J.; Joo, K. K.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Kim, H. W.; Kim, J. E.; Kim, S. B.; Kong, D. J.; Moon, C. S.; Oh, Y. D.; Suh, J. S.; Yang, Y. C.; Yu, I.] Seoul Natl Univ, Seoul 151742, South Korea.
[Chang, S. H.; Cho, K.; Jeon, E. J.; Joo, K. K.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Kim, H. W.; Kim, J. E.; Kim, S. B.; Kong, D. J.; Moon, C. S.; Oh, Y. D.; Suh, J. S.; Yang, Y. C.; Yu, I.] Sungkyunkwan Univ, Suwon 440746, South Korea.
[Chang, S. H.; Cho, K.; Jeon, E. J.; Joo, K. K.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Kim, H. W.; Kim, J. E.; Kim, S. B.; Kong, D. J.; Moon, C. S.; Oh, Y. D.; Suh, J. S.; Yang, Y. C.; Yu, I.] Korea Inst Sci & Technol Informat, Taejon 3050806, South Korea.
[Chang, S. H.; Cho, K.; Jeon, E. J.; Joo, K. K.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Kim, H. W.; Kim, J. E.; Kim, S. B.; Kong, D. J.; Moon, C. S.; Oh, Y. D.; Suh, J. S.; Yang, Y. C.; Yu, I.] Chonnam Natl Univ, Kwangju 500757, South Korea.
[Chang, S. H.; Cho, K.; Jeon, E. J.; Joo, K. K.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Kim, H. W.; Kim, J. E.; Kim, S. B.; Kong, D. J.; Moon, C. S.; Oh, Y. D.; Suh, J. S.; Yang, Y. C.; Yu, I.] Chonbuk Natl Univ, Jeonju 561756, South Korea.
[Barbaro-Galtieri, A.; Beringer, J.; Cerri, A.; Deisher, A.; Fang, H. C.; Haber, C.; Hsu, S. -C.; Lin, C. -S.; Lujan, P.; Lys, J.; Muelmenstaedt, J.; Nielsen, J.; Volobouev, I.; Yao, W. M.] Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Houlden, M.; Manca, G.; McNulty, R.; Mehta, A.; Shears, T.] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England.
[Bartsch, V.; Beecher, D.; Bizjak, I.; Cerrito, L.; Lancaster, M.; Malik, S.; Nurse, E.; Vine, T.; Waters, D.] UCL, London WC1E 6BT, England.
[Calancha, C.; Fernandez, J. P.; Martinez-Ballarin, R.; Redondo, I.; Ttito-Guzman, P.; Vidal, M.] Ctr Invest Energet Medioambientales & Tecnol, E-28040 Madrid, Spain.
[Bauer, G.; Choudalakis, G.; Gomez-Ceballos, G.; Goncharov, M.; Hahn, K.; Henderson, C.; Knuteson, B.; Makhoul, K.; Paus, C.; Xie, S.] MIT, Cambridge, MA 02139 USA.
[Beauchemin, P. -H.; Buzatu, A.; Carron, S.; MacQueen, D.; Pashapour, S.; Roy, P.; Sinervo, P.; Snihur, R.; Spreitzer, T.; Stelzer, B.; Stelzer-Chilton, O.; Warburton, A.; Williams, G.] McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada.
[Beauchemin, P. -H.; Buzatu, A.; Carron, S.; MacQueen, D.; Pashapour, S.; Roy, P.; Sinervo, P.; Snihur, R.; Spreitzer, T.; Stelzer, B.; Stelzer-Chilton, O.; Warburton, A.; Williams, G.] Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada.
[Beauchemin, P. -H.; Buzatu, A.; Carron, S.; MacQueen, D.; Pashapour, S.; Roy, P.; Sinervo, P.; Snihur, R.; Spreitzer, T.; Stelzer, B.; Stelzer-Chilton, O.; Warburton, A.; Williams, G.] Univ Toronto, Toronto, ON M5S 1A7, Canada.
[Beauchemin, P. -H.; Buzatu, A.; Carron, S.; MacQueen, D.; Pashapour, S.; Roy, P.; Sinervo, P.; Snihur, R.; Spreitzer, T.; Stelzer, B.; Stelzer-Chilton, O.; Warburton, A.; Williams, G.] TRIUMF, Vancouver, BC V6T 2A3, Canada.
[Amidei, D.; Campbell, M.; Cully, J. C.; Gerdes, D.; Strycker, G. L.; Tecchio, M.; Varganov, A.; Wright, T.] Univ Michigan, Ann Arbor, MI 48109 USA.
[Bromberg, C.; Campanelli, M.; Gunay-Unalan, Z.; Hussein, M.; Huston, J.; Miller, R.; Sorin, V.; Kollefson, K.] Michigan State Univ, E Lansing, MI 48824 USA.
[Shreyber, I.] Inst Theoret & Expt Phys, Moscow 117259, Russia.
[Gold, M.; Gorelov, I.; Seidel, S.; Strologas, J.; Vogel, M.] Univ New Mexico, Albuquerque, NM 87131 USA.
[Anastassov, A.; Schmitt, M.; Stentz, D.] Northwestern Univ, Evanston, IL 60208 USA.
[Efron, J.; Hughes, R. E.; Lannon, K.; Parks, B.; Slaunwhite, J.; Winer, B. L.] Ohio State Univ, Columbus, OH 43210 USA.
[Nakano, I.; Takashima, R.; Tanaka, R.] Okayama Univ, Okayama 7008530, Japan.
[Kato, Y.; Okusawa, T.; Seiya, Y.; Wakisaka, T.; Yamamoto, K.; Yoshida, T.] Osaka City Univ, Osaka 588, Japan.
[Amerio, S.; Bisello, D.; Busetto, G.; Compostella, G.; Cortiana, G.; Donini, J.; Dorigo, T.; Gresele, A.; Lazzizzera, I.; Loreti, M.; Lucchesi, D.; Griso, S. Pagan] Ist Nazl Fis Nucl, Sez Padova Trento, I-35131 Padua, Italy.
[Amerio, S.; Bisello, D.; Busetto, G.; Cortiana, G.; Gresele, A.; Lazzizzera, I.; Loreti, M.; Lucchesi, D.; Griso, S. Pagan] Univ Padua, I-35131 Padua, Italy.
[Ciobanu, C. I.; di Giovanni, G. P.; Savoy-Navarro, A.; Tourneur, S.] Univ Paris 06, IN2P3, CNRS, UMR7585,LPNHE, F-75252 Paris, France.
[Barria, P.; Bedeschi, F.; Bellettini, G.; Carosi, R.; Catastini, P.; Cavaliere, V.; Chiarelli, G.; A. Ciocci, M.; Crescioli, F.; Dell'Orso, M.; Di Canto, A.; Donati, S.; Ferrazza, C.; Garosi, P.; Giannetti, P.; Giunta, M.; Introzzi, G.; Lami, S.; Latino, G.; Leone, S.; Menzione, A.; Morello, M. J.; Piacentino, G.; Punzi, G.; Ristori, L.; Sartori, L.; Scribano, A.; Scuri, F.; Sforza, F.; Squillacioti, P.; Trovato, M.; Turini, N.; Vataga, E.; Volpi, G.] Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
[Canepa, A.; Heijboer, A.; Heinrich, J.; Keung, J.; Kroll, J.; Lipeles, E.; Lockyer, N. S.; Neu, C.; Pianori, E.; Rodriguez, T.; Thomson, E.; Tu, Y.; Wagner, P.; Whiteson, D.; Williams, H. H.] Univ Penn, Philadelphia, PA 19104 USA.
[Bellettini, G.; Crescioli, F.; Dell'Orso, M.; Di Canto, A.; Donati, S.; Punzi, G.; Sforza, F.; Volpi, G.] Univ Pisa, I-56127 Pisa, Italy.
[Barria, P.; Catastini, P.; Cavaliere, V.; A. Ciocci, M.; Garosi, P.; Latino, G.; Scribano, A.; Squillacioti, P.; Turini, N.] Univ Siena, I-56127 Pisa, Italy.
[Ferrazza, C.; Trovato, M.; Vataga, E.] Scuola Normale Super Pisa, I-56127 Pisa, Italy.
[Boudreau, J.; Gibson, K.; Hartz, M.; Liu, C.; Rahaman, A.; Shepard, P. F.] Univ Pittsburgh, Pittsburgh, PA 15260 USA.
[Apresyan, A.; Barnes, V. E.; Bolla, G.; Bortoletto, D.; Flanagan, G.; Garfinkel, A. F.; Jones, M.; Laasanen, A. T.; Margaroli, F.; Merkel, P.; Ranjan, N.; Sedov, A.] Purdue Univ, W Lafayette, IN 47907 USA.
[Bodek, A.; Boisvert, V.; Budd, H. S.; Chung, Y. S.; de Barbaro, P.; Gimmell, J. L.; Han, B. -Y.; Han, J. Y.; McFarland, K. S.; Sakumoto, W. K.; Yu, G. B.] Univ Rochester, Rochester, NY 14627 USA.
[Bhatti, A.; Demortier, L.; Goulianos, K.; Hatakeyama, K.; Lungu, G.; Mesropian, C.; Terashi, K.] Rockefeller Univ, New York, NY 10021 USA.
[De Cecco, S.; Dionisi, C.; Gallinaro, M.; Giagu, S.; Iori, M.; Luci, C.; Mastrandrea, P.; Rescigno, M.; Sarkar, S.; Zanello, L.] Ist Nazl Fis Nucl, I-00185 Rome, Italy.
[Dionisi, C.; Giagu, S.; Iori, M.; Luci, C.; Sarkar, S.; Zanello, L.] Univ Roma La Sapienza, I-00185 Rome, Italy.
[Chuang, S. H.; Dube, S.; Halkiadakis, E.; Hare, D.; Lath, A.; Somalwar, S.] Rutgers State Univ, Piscataway, NJ 08855 USA.
[Aurisano, A.; Elagin, A.; Kamon, T.; Khotilovich, V.; Lee, E.; Lee, S. W.; McIntyre, P.; Safonov, A.; Toback, D.; Weinberger, M.] Texas A&M Univ, College Stn, TX 77843 USA.
[Cauz, D.; Di Ruzza, B.; Giordani, M.; Pagliarone, C.; Pauletta, G.; Penzo, A.; Rossi, M.; Santi, L.; Totaro, P.; Zanetti, A.] Ist Nazl Fis Nucl Trieste Udine, I-34100 Trieste, Italy.
[Cauz, D.; Di Ruzza, B.; Giordani, M.; Pauletta, G.; Santi, L.; Totaro, P.] Univ Trieste, I-33100 Udine, Italy.
[Akimoto, T.; Hara, K.; Kim, S. H.; Kimura, N.; Kubo, T.; Kurata, M.; Maruyama, T.; Masubuchi, T.; Miyake, H.; Nagai, Y.; Nagano, A.; Naganoma, J.; Nakamura, K.; Shimojima, M.; Suzuki, T.; Takeuchi, Y.; Tomura, T.; Ukegawa, F.] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan.
[Hare, M.; Napier, A.; Rolli, S.; Sliwa, K.; Whitehouse, B.] Tufts Univ, Medford, MA 02155 USA.
[Arisawa, T.; Kondo, K.; Yorita, K.] Waseda Univ, Tokyo 169, Japan.
[Harr, R. F.; Karchin, P. E.; Kulkarni, N. P.; Mattson, M. E.; Shalhout, S. Z.] Wayne State Univ, Detroit, MI 48201 USA.
[Bellinger, J.; Carlsmith, D.; Chung, W. H.; Herndon, M.; Nett, J.; Pondrom, L.; Pursley, J.; Ramakrishnan, V.; Shon, Y.] Univ Wisconsin, Madison, WI 53706 USA.
[Feild, R. G.; Husemann, U.; Loginov, A.; Martin, A.; Schmidt, M. P.; Stanitzki, M.; Tipton, P.] Yale Univ, New Haven, CT 06520 USA.
RP Aaltonen, T (reprint author), Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland.
RI Piacentino, Giovanni/K-3269-2015; Martinez Ballarin,
Roberto/K-9209-2015; Gorelov, Igor/J-9010-2015; Xie, Si/O-6830-2016;
Canelli, Florencia/O-9693-2016; Moon, Chang-Seong/J-3619-2014;
Scodellaro, Luca/K-9091-2014; Grinstein, Sebastian/N-3988-2014; Paulini,
Manfred/N-7794-2014; Russ, James/P-3092-2014; unalan,
zeynep/C-6660-2015; Lazzizzera, Ignazio/E-9678-2015; Cabrera Urban,
Susana/H-1376-2015; Garcia, Jose /H-6339-2015; Cavalli-Sforza,
Matteo/H-7102-2015; Chiarelli, Giorgio/E-8953-2012; Muelmenstaedt,
Johannes/K-2432-2015; Introzzi, Gianluca/K-2497-2015; De Cecco,
Sandro/B-1016-2012; Robson, Aidan/G-1087-2011; St.Denis,
Richard/C-8997-2012; Ruiz, Alberto/E-4473-2011; Ivanov,
Andrew/A-7982-2013; manca, giulia/I-9264-2012; Amerio,
Silvia/J-4605-2012; Warburton, Andreas/N-8028-2013; Kim,
Soo-Bong/B-7061-2014; Lysak, Roman/H-2995-2014; Punzi,
Giovanni/J-4947-2012; Zeng, Yu/C-1438-2013; Annovi, Alberto/G-6028-2012
OI Piacentino, Giovanni/0000-0001-9884-2924; Martinez Ballarin,
Roberto/0000-0003-0588-6720; Gorelov, Igor/0000-0001-5570-0133; Xie,
Si/0000-0003-2509-5731; Canelli, Florencia/0000-0001-6361-2117; Moon,
Chang-Seong/0000-0001-8229-7829; Scodellaro, Luca/0000-0002-4974-8330;
Grinstein, Sebastian/0000-0002-6460-8694; Paulini,
Manfred/0000-0002-6714-5787; Russ, James/0000-0001-9856-9155; unalan,
zeynep/0000-0003-2570-7611; Lazzizzera, Ignazio/0000-0001-5092-7531;
Chiarelli, Giorgio/0000-0001-9851-4816; Muelmenstaedt,
Johannes/0000-0003-1105-6678; Introzzi, Gianluca/0000-0002-1314-2580;
Ruiz, Alberto/0000-0002-3639-0368; Ivanov, Andrew/0000-0002-9270-5643;
Warburton, Andreas/0000-0002-2298-7315; Punzi,
Giovanni/0000-0002-8346-9052; Annovi, Alberto/0000-0002-4649-4398
FU U.S. Department of Energy; National Science Foundation; Italian Istituto
Nazionale di Fisica Nucleare; Ministry of Education, Culture, Sports,
Science and Technology of Japan; Natural Sciences and Engineering
Research Council of Canada; National Science Council of the Republic of
China; A.P. Sloan Foundation; Bundesministerium fur Bildung und
Forschung, Germany; National Research Foundation of Korea; Science and
Technology Facilities Council and the Royal Society, UK; Institut
National de Physique Nucleaire et Physique des Particules/CNRS; Russian
Foundation for Basic Research; Ministerio de Ciencia e Innovacion, and
Programa Consolider-Ingenio 2010, Spain; Slovak RD Agency; Academy of
Finland; Swiss National Science Foundation
FX We thank the Fermilab staff and the technical staffs of the
participating institutions for their vital contributions. This work was
supported by the U.S. Department of Energy and National Science
Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the
Ministry of Education, Culture, Sports, Science and Technology of Japan;
the Natural Sciences and Engineering Research Council of Canada; the
National Science Council of the Republic of China; the Swiss National
Science Foundation; the A.P. Sloan Foundation; the Bundesministerium fur
Bildung und Forschung, Germany; the World Class University Program, the
National Research Foundation of Korea; the Science and Technology
Facilities Council and the Royal Society, UK; the Institut National de
Physique Nucleaire et Physique des Particules/CNRS; the Russian
Foundation for Basic Research; the Ministerio de Ciencia e Innovacion,
and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D Agency; and
the Academy of Finland.
NR 39
TC 9
Z9 9
U1 1
U2 15
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY 1
PY 2010
VL 81
IS 9
AR 092002
DI 10.1103/PhysRevD.81.092002
PG 18
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 602NC
UT WOS:000278145100006
ER
PT J
AU Adler, S
Bazarko, AO
Bergbusch, PC
Blackmore, EW
Bryman, DA
Chen, S
Chiang, IH
Diwan, MV
Frank, JS
Fujiwara, T
Haggerty, JS
Hu, J
Inagaki, T
Ito, MM
Jaffe, DE
Jain, V
Kabe, S
Kettell, SH
Kitching, P
Kobayashi, M
Komatsubara, TK
Konaka, A
Kuno, Y
Kuriki, M
Li, KK
Littenberg, LS
Macdonald, JA
Meyers, PD
Mildenberger, J
Miyajima, M
Muramatsu, N
Nakano, T
Ng, C
Ng, S
Nomura, T
Numao, T
Poutissou, JM
Poutissou, R
Redlinger, G
Sato, T
Shimada, K
Shimoyama, T
Shinkawa, T
Shoemaker, FC
Stone, JR
Strand, RC
Sugimoto, S
Tamagawa, Y
Tsunemi, T
Witzig, C
Yoshimura, Y
AF Adler, S.
Bazarko, A. O.
Bergbusch, P. C.
Blackmore, E. W.
Bryman, D. A.
Chen, S.
Chiang, I-H.
Diwan, M. V.
Frank, J. S.
Fujiwara, T.
Haggerty, J. S.
Hu, J.
Inagaki, T.
Ito, M. M.
Jaffe, D. E.
Jain, V.
Kabe, S.
Kettell, S. H.
Kitching, P.
Kobayashi, M.
Komatsubara, T. K.
Konaka, A.
Kuno, Y.
Kuriki, M.
Li, K. K.
Littenberg, L. S.
Macdonald, J. A.
Meyers, P. D.
Mildenberger, J.
Miyajima, M.
Muramatsu, N.
Nakano, T.
Ng, C.
Ng, S.
Nomura, T.
Numao, T.
Poutissou, J. -M.
Poutissou, R.
Redlinger, G.
Sato, T.
Shimada, K.
Shimoyama, T.
Shinkawa, T.
Shoemaker, F. C.
Stone, J. R.
Strand, R. C.
Sugimoto, S.
Tamagawa, Y.
Tsunemi, T.
Witzig, C.
Yoshimura, Y.
CA E787 Collaboration
TI Measurement of the K+ -> pi(0)mu(+)nu(mu)gamma branching ratio
SO PHYSICAL REVIEW D
LA English
DT Article
ID ENDCAP PHOTON DETECTOR; 500 MHZ; DECAY; SEARCH; PERFORMANCE; MEV/C
AB A measurement of the decay K+ -> pi(0)mu(+)nu(mu)gamma has been performed with the E787 detector at Brookhaven National Laboratory. Forty events were observed in the signal region with the background expectation of (16.5 +/- 2.7) events. The branching ratio was measured to be (1.58 +/- 0.46(stat.) +/- 0.08(syst.)) x 10(-5) in the kinematic region E-gamma > 30 MeV and theta(mu gamma) > 20 degrees, where E-gamma is the energy of the emitted photon and theta(mu gamma) is the angle between the muon and the photon in the K+ rest frame. The results were consistent with theoretical predictions.
C1 [Adler, S.; Chiang, I-H.; Diwan, M. V.; Frank, J. S.; Haggerty, J. S.; Jaffe, D. E.; Jain, V.; Kettell, S. H.; Li, K. K.; Littenberg, L. S.; Ng, C.; Shinkawa, T.; Strand, R. C.; Witzig, C.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Ng, C.] SUNY Stony Brook, Dept Phys, Stony Brook, NY 11794 USA.
[Bazarko, A. O.; Ito, M. M.; Meyers, P. D.; Shoemaker, F. C.; Stone, J. R.] Princeton Univ, Joseph Henry Labs, Princeton, NJ 08544 USA.
[Bergbusch, P. C.; Bryman, D. A.] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada.
[Blackmore, E. W.; Chen, S.; Hu, J.; Konaka, A.; Macdonald, J. A.; Mildenberger, J.; Numao, T.; Poutissou, J. -M.; Poutissou, R.; Redlinger, G.] TRIUMF, Vancouver, BC V6T 2A3, Canada.
[Fujiwara, T.; Nomura, T.] Kyoto Univ, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan.
[Inagaki, T.; Kabe, S.; Kobayashi, M.; Komatsubara, T. K.; Kuno, Y.; Kuriki, M.; Sato, T.; Shinkawa, T.; Sugimoto, S.; Tsunemi, T.; Yoshimura, Y.] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan.
[Kitching, P.; Ng, S.] Univ Alberta, Ctr Subat Res, Edmonton, AB T6G 2N5, Canada.
[Miyajima, M.; Shimada, K.; Shimoyama, T.; Tamagawa, Y.] Univ Fukui, Dept Appl Phys, Fukui 9108507, Japan.
[Muramatsu, N.; Nakano, T.] Osaka Univ, Nucl Phys Res Ctr, Osaka 5670047, Japan.
RP Adler, S (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM fujiwara@scphys.kyoto-u.ac.jp
FU U.S. Department of Energy [DE-AC02-98CH10886, W-7405-ENG-36,
DE-FG02-91ER40671]; Ministry of Education, Culture, Sports, Science, and
Technology of Japan; Natural Sciences and Engineering Research Council;
National Research Council of Canada
FX A. J. S. Smith. We gratefully acknowledge the dedicated effort of the
technical staff supporting this experiment and of the Brookhaven
Collider-Accelerator Department. This research was supported in part by
the U.S. Department of Energy under Contracts No. DE-AC02-98CH10886, No.
W-7405-ENG-36, and Grant No. DE-FG02-91ER40671, by the Ministry of
Education, Culture, Sports, Science, and Technology of Japan through the
Japan-US Cooperative Research Program in High Energy Physics and under
the Grant-in-Aids for Scientific Research, for Encouragement of Young
Scientists and for JSPS Fellows, and by the Natural Sciences and
Engineering Research Council and the National Research Council of
Canada.
NR 34
TC 2
Z9 2
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD MAY 1
PY 2010
VL 81
IS 9
AR 092001
DI 10.1103/PhysRevD.81.092001
PG 10
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 602NC
UT WOS:000278145100005
ER
PT J
AU Aguilar-Arevalo, AA
Anderson, CE
Bazarko, AO
Brice, SJ
Brown, BC
Bugel, L
Cao, J
Coney, L
Conrad, JM
Cox, DC
Curioni, A
Djurcic, Z
Finley, DA
Fleming, BT
Ford, R
Garcia, FG
Garvey, GT
Grange, J
Green, C
Green, JA
Hart, TL
Hawker, E
Imlay, R
Johnson, RA
Karagiorgi, G
Kasper, P
Katori, T
Kobilarcik, T
Kourbanis, I
Koutsoliotas, S
Laird, EM
Linden, SK
Link, JM
Liu, Y
Liu, Y
Louis, WC
Mahn, KBM
Marsh, W
Mauger, C
McGary, VT
McGregor, G
Metcalf, W
Meyers, PD
Mills, F
Mills, GB
Monroe, J
Moore, CD
Mousseau, J
Nelson, RH
Nienaber, P
Nowak, JA
Osmanov, B
Ouedraogo, S
Patterson, RB
Pavlovic, Z
Perevalov, D
Polly, CC
Prebys, E
Raaf, JL
Ray, H
Roe, BP
Russell, AD
Sandberg, V
Schirato, R
Schmitz, D
Shaevitz, MH
Shoemaker, FC
Smith, D
Soderberg, M
Sorel, M
Spentzouris, P
Spitz, J
Stancu, I
Stefanski, RJ
Sung, M
Tanaka, HA
Tayloe, R
Tzanov, M
van de Water, RG
Wascko, MO
White, DH
Wilking, MJ
Yang, HJ
Zeller, GP
Zimmerman, ED
AF Aguilar-Arevalo, A. A.
Anderson, C. E.
Bazarko, A. O.
Brice, S. J.
Brown, B. C.
Bugel, L.
Cao, J.
Coney, L.
Conrad, J. M.
Cox, D. C.
Curioni, A.
Djurcic, Z.
Finley, D. A.
Fleming, B. T.
Ford, R.
Garcia, F. G.
Garvey, G. T.
Grange, J.
Green, C.
Green, J. A.
Hart, T. L.
Hawker, E.
Imlay, R.
Johnson, R. A.
Karagiorgi, G.
Kasper, P.
Katori, T.
Kobilarcik, T.
Kourbanis, I.
Koutsoliotas, S.
Laird, E. M.
Linden, S. K.
Link, J. M.
Liu, Y.
Liu, Y.
Louis, W. C.
Mahn, K. B. M.
Marsh, W.
Mauger, C.
McGary, V. T.
McGregor, G.
Metcalf, W.
Meyers, P. D.
Mills, F.
Mills, G. B.
Monroe, J.
Moore, C. D.
Mousseau, J.
Nelson, R. H.
Nienaber, P.
Nowak, J. A.
Osmanov, B.
Ouedraogo, S.
Patterson, R. B.
Pavlovic, Z.
Perevalov, D.
Polly, C. C.
Prebys, E.
Raaf, J. L.
Ray, H.
Roe, B. P.
Russell, A. D.
Sandberg, V.
Schirato, R.
Schmitz, D.
Shaevitz, M. H.
Shoemaker, F. C.
Smith, D.
Soderberg, M.
Sorel, M.
Spentzouris, P.
Spitz, J.
Stancu, I.
Stefanski, R. J.
Sung, M.
Tanaka, H. A.
Tayloe, R.
Tzanov, M.
van de Water, R. G.
Wascko, M. O.
White, D. H.
Wilking, M. J.
Yang, H. J.
Zeller, G. P.
Zimmerman, E. D.
CA MiniBooNE Collaboration
TI First measurement of the muon neutrino charged current quasielastic
double differential cross section
SO PHYSICAL REVIEW D
LA English
DT Article
ID ELECTRON-SCATTERING; PION ABSORPTION; FORM-FACTORS; MINIBOONE; NUCLEI;
DISTRIBUTIONS; SIMULATION; NUANCE; CARBON
AB A high-statistics sample of charged-current muon neutrino scattering events collected with the MiniBooNE experiment is analyzed to extract the first measurement of the double differential cross section (d(2)sigma/dT(mu)dcos theta(mu)) for charged-current quasielastic (CCQE) scattering on carbon. This result features minimal model dependence and provides the most complete information on this process to date. With the assumption of CCQE scattering, the absolute cross section as a function of neutrino energy (sigma[E-nu]) and the single differential cross section (d sigma/dQ(2)) are extracted to facilitate comparison with previous measurements. These quantities may be used to characterize an effective axial-vector form factor of the nucleon and to improve the modeling of low-energy neutrino interactions on nuclear targets. The results are relevant for experiments searching for neutrino oscillations.
C1 [Aguilar-Arevalo, A. A.] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico.
[Liu, Y.; Perevalov, D.; Stancu, I.] Univ Alabama, Tuscaloosa, AL 35487 USA.
[Koutsoliotas, S.] Bucknell Univ, Lewisburg, PA 17837 USA.
[Hawker, E.; Johnson, R. A.; Raaf, J. L.] Univ Cincinnati, Cincinnati, OH 45221 USA.
[Hart, T. L.; Nelson, R. H.; Tzanov, M.; Wilking, M. J.; Zimmerman, E. D.] Univ Colorado, Boulder, CO 80309 USA.
[Bugel, L.; Coney, L.; Djurcic, Z.; Mahn, K. B. M.; Monroe, J.; Schmitz, D.; Shaevitz, M. H.; Sorel, M.] Columbia Univ, New York, NY 10027 USA.
[Smith, D.] Embry Riddle Aeronaut Univ, Prescott, AZ 86301 USA.
[Brice, S. J.; Brown, B. C.; Finley, D. A.; Ford, R.; Garcia, F. G.; Green, C.; Kasper, P.; Kobilarcik, T.; Kourbanis, I.; Marsh, W.; Mills, F.; Moore, C. D.; Polly, C. C.; Prebys, E.; Russell, A. D.; Spentzouris, P.; Stefanski, R. J.; Zeller, G. P.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Mousseau, J.; Osmanov, B.; Ray, H.] Univ Florida, Gainesville, FL 32611 USA.
[Cox, D. C.; Green, J. A.; Katori, T.; Tayloe, R.] Indiana Univ, Bloomington, IN 47405 USA.
[Garvey, G. T.; Green, C.; Green, J. A.; Hawker, E.; Louis, W. C.; Mauger, C.; McGregor, G.; Mills, G. B.; Pavlovic, Z.; Ray, H.; Sandberg, V.; Schirato, R.; van de Water, R. G.; White, D. H.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Imlay, R.; Metcalf, W.; Nowak, J. A.; Ouedraogo, S.; Sung, M.; Wascko, M. O.] Louisiana State Univ, Baton Rouge, LA 70803 USA.
[Conrad, J. M.; Karagiorgi, G.; Katori, T.; McGary, V. T.] MIT, Cambridge, MA 02139 USA.
[Cao, J.; Liu, Y.; Roe, B. P.; Yang, H. J.] Univ Michigan, Ann Arbor, MI 48109 USA.
[Bazarko, A. O.; Laird, E. M.; Meyers, P. D.; Patterson, R. B.; Shoemaker, F. C.; Tanaka, H. A.] Princeton Univ, Princeton, NJ 08544 USA.
[Nienaber, P.] St Marys Univ Minnesota, Winona, MN 55987 USA.
[Link, J. M.] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA.
[Anderson, C. E.; Curioni, A.; Fleming, B. T.; Linden, S. K.; Soderberg, M.; Spitz, J.] Yale Univ, New Haven, CT 06520 USA.
RP Aguilar-Arevalo, AA (reprint author), Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico.
RI Nowak, Jaroslaw/P-2502-2016; Yang, Haijun/O-1055-2015; Cao,
Jun/G-8701-2012; Link, Jonathan/L-2560-2013
OI Van de Water, Richard/0000-0002-1573-327X; Katori,
Teppei/0000-0002-9429-9482; Schirato, Richard/0000-0002-4216-0235;
Schmitz, David/0000-0003-2165-7389; Nowak, Jaroslaw/0000-0001-8637-5433;
Wascko, Morgan/0000-0002-8348-4447; Louis, William/0000-0002-7579-3709;
Spitz, Joshua/0000-0002-6288-7028; Aguilar-Arevalo, Alexis
A./0000-0001-9279-3375; Raaf, Jennifer/0000-0002-4533-929X; Sorel,
Michel/0000-0003-2141-9508; Cao, Jun/0000-0002-3586-2319; Link,
Jonathan/0000-0002-1514-0650
FU Fermilab; U.S. Department of Energy; National Science Foundation
FX This work was conducted with support from Fermilab, the U.S. Department
of Energy, and the National Science Foundation .
NR 78
TC 58
Z9 58
U1 1
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD MAY 1
PY 2010
VL 81
IS 9
AR 092005
DI 10.1103/PhysRevD.81.092005
PG 22
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 602NC
UT WOS:000278145100009
ER
PT J
AU Aubert, B
Karyotakis, Y
Lees, JP
Poireau, V
Prencipe, E
Prudent, X
Tisserand, V
Tico, JG
Grauges, E
Martinelli, M
Palano, A
Pappagallo, M
Eigen, G
Stugu, B
Sun, L
Battaglia, M
Brown, DN
Hooberman, B
Kerth, LT
Kolomensky, YG
Lynch, G
Osipenkov, IL
Tackmann, K
Tanabe, T
Hawkes, CM
Soni, N
Watson, AT
Koch, H
Schroeder, T
Asgeirsson, DJ
Hearty, C
Mattison, TS
McKenna, JA
Barrett, M
Khan, A
Randle-Conde, A
Blinov, VE
Bukin, AD
Buzykaev, AR
Druzhinin, VP
Golubev, VB
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Todyshev, KY
Bondioli, M
Curry, S
Eschrich, I
Kirkby, D
Lankford, AJ
Lund, P
Mandelkern, M
Martin, EC
Stoker, DP
Atmacan, H
Gary, JW
Liu, F
Long, O
Vitug, GM
Yasin, Z
Sharma, V
Campagnari, C
Hong, TM
Kovalskyi, D
Mazur, MA
Richman, JD
Beck, TW
Eisner, AM
Heusch, CA
Kroseberg, J
Lockman, WS
Martinez, AJ
Schalk, T
Schumm, BA
Seiden, A
Winstrom, LO
Cheng, CH
Doll, DA
Echenard, B
Fang, F
Hitlin, DG
Narsky, I
Ongmongkolkul, P
Piatenko, T
Porter, FC
Andreassen, R
Dubrovin, MS
Mancinelli, G
Meadows, BT
Mishra, K
Sokoloff, MD
Bloom, PC
Ford, WT
Gaz, A
Hirschauer, JF
Nagel, M
Nauenberg, U
Smith, JG
Wagner, SR
Ayad, R
Toki, WH
Feltresi, E
Hauke, A
Jasper, H
Karbach, TM
Merkel, J
Petzold, A
Spaan, B
Wacker, K
Kobel, MJ
Schubert, KR
Schwierz, R
Bernard, D
Latour, E
Verderi, M
Clark, PJ
Playfer, S
Watson, JE
Andreotti, M
Bettoni, D
Bozzi, C
Calabrese, R
Cecchi, A
Cibinetto, G
Fioravanti, E
Franchini, P
Luppi, E
Munerato, M
Negrini, M
Petrella, A
Piemontese, L
Santoro, V
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Finocchiaro, G
Pacetti, S
Patteri, P
Peruzzi, IM
Piccolo, M
Rama, M
Zallo, A
Contri, R
Guido, E
Lo Vetere, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Tosi, S
Morii, M
Adametz, A
Marks, J
Schenk, S
Uwer, U
Bernlochner, FU
Lacker, HM
Lueck, T
Volk, A
Dauncey, PD
Tibbetts, M
Behera, PK
Charles, MJ
Mallik, U
Chen, C
Cochran, J
Crawley, HB
Dong, L
Eyges, V
Meyer, WT
Prell, S
Rosenberg, EI
Rubin, AE
Gao, YY
Gritsan, AV
Guo, ZJ
Arnaud, N
Davier, M
Derkach, D
da Costa, JF
Grosdidier, G
Le Diberder, F
Lepeltier, V
Lutz, AM
Malaescu, B
Roudeau, P
Schune, MH
Serrano, J
Sordini, V
Stocchi, A
Wormser, G
Lange, DJ
Wright, DM
Bingham, I
Burke, JP
Chavez, CA
Fry, JR
Gabathuler, E
Gamet, R
Hutchcroft, DE
Payne, DJ
Touramanis, C
Bevan, AJ
Clarke, CK
Di Lodovico, F
Sacco, R
Sigamani, M
Cowan, G
Paramesvaran, S
Wren, AC
Brown, DN
Davis, CL
Denig, AG
Fritsch, M
Gradl, W
Hafner, A
Alwyn, KE
Bailey, D
Barlow, RJ
Jackson, G
Lafferty, GD
West, TJ
Yi, JI
Anderson, J
Jawahery, A
Roberts, DA
Simi, G
Tuggle, JM
Dallapiccola, C
Salvati, E
Cowan, R
Dujmic, D
Fisher, PH
Henderson, SW
Sciolla, G
Spitznagel, M
Yamamoto, RK
Zhao, M
Patel, PM
Robertson, SH
Schram, M
Biassoni, P
Lazzaro, A
Lombardo, V
Palombo, F
Stracka, S
Cremaldi, L
Godang, R
Kroeger, R
Sonnek, P
Summers, DJ
Zhao, HW
Nguyen, X
Simard, M
Taras, P
Nicholson, H
De Nardo, G
Lista, L
Monorchio, D
Onorato, G
Sciacca, C
Raven, G
Snoek, HL
Jessop, CP
Knoepfel, KJ
LoSecco, JM
Wang, WF
Corwin, LA
Honscheid, K
Kagan, H
Kass, R
Morris, JP
Rahimi, AM
Sekula, SJ
Blount, NL
Brau, J
Frey, R
Igonkina, O
Kolb, JA
Lu, M
Rahmat, R
Sinev, NB
Strom, D
Strube, J
Torrence, E
Castelli, G
Gagliardi, N
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Voci, C
Sanchez, PD
Ben-Haim, E
Bonneaud, GR
Briand, H
Chauveau, J
Hamon, O
Leruste, P
Marchiori, G
Ocariz, J
Perez, A
Prendki, J
Sitt, S
Gladney, L
Biasini, M
Manoni, E
Angelini, C
Batignani, G
Bettarini, S
Calderini, G
Carpinelli, M
Cervelli, A
Forti, F
Giorgi, MA
Lusiani, A
Morganti, M
Neri, N
Paoloni, E
Rizzo, G
Walsh, JJ
Pegna, DL
Lu, C
Olsen, J
Smith, AJS
Telnov, AV
Anulli, F
Baracchini, E
Cavoto, G
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Jackson, PD
Gioi, LL
Mazzoni, MA
Morganti, S
Piredda, G
Renga, F
Voena, C
Ebert, M
Hartmann, T
Schroder, H
Waldi, R
Adye, T
Franek, B
Olaiya, EO
Wilson, FF
Emery, S
Esteve, L
de Monchenault, GH
Kozanecki, W
Vasseur, G
Yeche, C
Zito, M
Allen, MT
Aston, D
Bard, DJ
Bartoldus, R
Benitez, JF
Cenci, R
Coleman, JP
Convery, MR
Dingfelder, JC
Dorfan, J
Dubois-Felsmann, GP
Dunwoodie, W
Field, RC
Sevilla, MF
Fulsom, BG
Gabareen, AM
Graham, MT
Grenier, P
Hast, C
Innes, WR
Kaminski, J
Kelsey, MH
Kim, H
Kim, P
Kocian, ML
Leith, DWGS
Li, S
Lindquist, B
Luitz, S
Luth, V
Lynch, HL
MacFarlane, DB
Marsiske, H
Messner, R
Muller, DR
Neal, H
Nelson, S
O'Grady, CP
Ofte, I
Perl, M
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Snyder, A
Su, D
Sullivan, MK
Suzuki, K
Swain, SK
Thompson, JM
Va'vra, J
Wagner, AP
Weaver, M
West, CA
Wisniewski, WJ
Wittgen, M
Wright, DH
Wulsin, HW
Yarritu, AK
Young, CC
Ziegler, V
Chen, XR
Liu, H
Park, W
Purohit, MV
White, RM
Wilson, JR
Bellis, M
Burchat, PR
Edwards, AJ
Miyashita, TS
Ahmed, S
Alam, MS
Ernst, JA
Pan, B
Saeed, MA
Zain, SB
Soffer, A
Spanier, SM
Wogsland, BJ
Eckmann, R
Ritchie, JL
Ruland, AM
Schilling, CJ
Schwitters, RF
Wray, BC
Drummond, BW
Izen, JM
Lou, XC
Bianchi, F
Gamba, D
Pelliccioni, M
Bomben, M
Bosisio, L
Cartaro, C
Della Ricca, G
Lanceri, L
Vitale, L
Azzolini, V
Lopez-March, N
Martinez-Vidal, F
Milanes, DA
Oyanguren, A
Albert, J
Banerjee, S
Bhuyan, B
Choi, HHF
Hamano, K
King, GJ
Kowalewski, R
Lewczuk, MJ
Nugent, IM
Roney, JM
Sobie, RJ
Gershon, TJ
Harrison, PF
Ilic, J
Latham, TE
Mohanty, GB
Puccio, EMT
Band, HR
Chen, X
Dasu, S
Flood, KT
Pan, Y
Prepost, R
Vuosalo, CO
Wu, SL
AF Aubert, B.
Karyotakis, Y.
Lees, J. P.
Poireau, V.
Prencipe, E.
Prudent, X.
Tisserand, V.
Garra Tico, J.
Grauges, E.
Martinelli, M.
Palano, A.
Pappagallo, M.
Eigen, G.
Stugu, B.
Sun, L.
Battaglia, M.
Brown, D. N.
Hooberman, B.
Kerth, L. T.
Kolomensky, Yu. G.
Lynch, G.
Osipenkov, I. L.
Tackmann, K.
Tanabe, T.
Hawkes, C. M.
Soni, N.
Watson, A. T.
Koch, H.
Schroeder, T.
Asgeirsson, D. J.
Hearty, C.
Mattison, T. S.
McKenna, J. A.
Barrett, M.
Khan, A.
Randle-Conde, A.
Blinov, V. E.
Bukin, A. D.
Buzykaev, A. R.
Druzhinin, V. P.
Golubev, V. B.
Onuchin, A. P.
Serednyakov, S. I.
Skovpen, Yu. I.
Solodov, E. P.
Todyshev, K. Yu.
Bondioli, M.
Curry, S.
Eschrich, I.
Kirkby, D.
Lankford, A. J.
Lund, P.
Mandelkern, M.
Martin, E. C.
Stoker, D. P.
Atmacan, H.
Gary, J. W.
Liu, F.
Long, O.
Vitug, G. M.
Yasin, Z.
Sharma, V.
Campagnari, C.
Hong, T. M.
Kovalskyi, D.
Mazur, M. A.
Richman, J. D.
Beck, T. W.
Eisner, A. M.
Heusch, C. A.
Kroseberg, J.
Lockman, W. S.
Martinez, A. J.
Schalk, T.
Schumm, B. A.
Seiden, A.
Winstrom, L. O.
Cheng, C. H.
Doll, D. A.
Echenard, B.
Fang, F.
Hitlin, D. G.
Narsky, I.
Ongmongkolkul, P.
Piatenko, T.
Porter, F. C.
Andreassen, R.
Dubrovin, M. S.
Mancinelli, G.
Meadows, B. T.
Mishra, K.
Sokoloff, M. D.
Bloom, P. C.
Ford, W. T.
Gaz, A.
Hirschauer, J. F.
Nagel, M.
Nauenberg, U.
Smith, J. G.
Wagner, S. R.
Ayad, R.
Toki, W. H.
Feltresi, E.
Hauke, A.
Jasper, H.
Karbach, T. M.
Merkel, J.
Petzold, A.
Spaan, B.
Wacker, K.
Kobel, M. J.
Schubert, K. R.
Schwierz, R.
Bernard, D.
Latour, E.
Verderi, M.
Clark, P. J.
Playfer, S.
Watson, J. E.
Andreotti, M.
Bettoni, D.
Bozzi, C.
Calabrese, R.
Cecchi, A.
Cibinetto, G.
Fioravanti, E.
Franchini, P.
Luppi, E.
Munerato, M.
Negrini, M.
Petrella, A.
Piemontese, L.
Santoro, V.
Baldini-Ferroli, R.
Calcaterra, A.
de Sangro, R.
Finocchiaro, G.
Pacetti, S.
Patteri, P.
Peruzzi, I. M.
Piccolo, M.
Rama, M.
Zallo, A.
Contri, R.
Guido, E.
Lo Vetere, M.
Monge, M. R.
Passaggio, S.
Patrignani, C.
Robutti, E.
Tosi, S.
Morii, M.
Adametz, A.
Marks, J.
Schenk, S.
Uwer, U.
Bernlochner, F. U.
Lacker, H. M.
Lueck, T.
Volk, A.
Dauncey, P. D.
Tibbetts, M.
Behera, P. K.
Charles, M. J.
Mallik, U.
Chen, C.
Cochran, J.
Crawley, H. B.
Dong, L.
Eyges, V.
Meyer, W. T.
Prell, S.
Rosenberg, E. I.
Rubin, A. E.
Gao, Y. Y.
Gritsan, A. V.
Guo, Z. J.
Arnaud, N.
Davier, M.
Derkach, D.
da Costa, J. Firmino
Grosdidier, G.
Le Diberder, F.
Lepeltier, V.
Lutz, A. M.
Malaescu, B.
Roudeau, P.
Schune, M. H.
Serrano, J.
Sordini, V.
Stocchi, A.
Wormser, G.
Lange, D. J.
Wright, D. M.
Bingham, I.
Burke, J. P.
Chavez, C. A.
Fry, J. R.
Gabathuler, E.
Gamet, R.
Hutchcroft, D. E.
Payne, D. J.
Touramanis, C.
Bevan, A. J.
Clarke, C. K.
Di Lodovico, F.
Sacco, R.
Sigamani, M.
Cowan, G.
Paramesvaran, S.
Wren, A. C.
Brown, D. N.
Davis, C. L.
Denig, A. G.
Fritsch, M.
Gradl, W.
Hafner, A.
Alwyn, K. E.
Bailey, D.
Barlow, R. J.
Jackson, G.
Lafferty, G. D.
West, T. J.
Yi, J. I.
Anderson, J.
Jawahery, A.
Roberts, D. A.
Simi, G.
Tuggle, J. M.
Dallapiccola, C.
Salvati, E.
Cowan, R.
Dujmic, D.
Fisher, P. H.
Henderson, S. W.
Sciolla, G.
Spitznagel, M.
Yamamoto, R. K.
Zhao, M.
Patel, P. M.
Robertson, S. H.
Schram, M.
Biassoni, P.
Lazzaro, A.
Lombardo, V.
Palombo, F.
Stracka, S.
Cremaldi, L.
Godang, R.
Kroeger, R.
Sonnek, P.
Summers, D. J.
Zhao, H. W.
Nguyen, X.
Simard, M.
Taras, P.
Nicholson, H.
De Nardo, G.
Lista, L.
Monorchio, D.
Onorato, G.
Sciacca, C.
Raven, G.
Snoek, H. L.
Jessop, C. P.
Knoepfel, K. J.
LoSecco, J. M.
Wang, W. F.
Corwin, L. A.
Honscheid, K.
Kagan, H.
Kass, R.
Morris, J. P.
Rahimi, A. M.
Sekula, S. J.
Blount, N. L.
Brau, J.
Frey, R.
Igonkina, O.
Kolb, J. A.
Lu, M.
Rahmat, R.
Sinev, N. B.
Strom, D.
Strube, J.
Torrence, E.
Castelli, G.
Gagliardi, N.
Margoni, M.
Morandin, M.
Posocco, M.
Rotondo, M.
Simonetto, F.
Stroili, R.
Voci, C.
Sanchez, P. del Amo
Ben-Haim, E.
Bonneaud, G. R.
Briand, H.
Chauveau, J.
Hamon, O.
Leruste, Ph.
Marchiori, G.
Ocariz, J.
Perez, A.
Prendki, J.
Sitt, S.
Gladney, L.
Biasini, M.
Manoni, E.
Angelini, C.
Batignani, G.
Bettarini, S.
Calderini, G.
Carpinelli, M.
Cervelli, A.
Forti, F.
Giorgi, M. A.
Lusiani, A.
Morganti, M.
Neri, N.
Paoloni, E.
Rizzo, G.
Walsh, J. J.
Pegna, D. Lopes
Lu, C.
Olsen, J.
Smith, A. J. S.
Telnov, A. V.
Anulli, F.
Baracchini, E.
Cavoto, G.
Faccini, R.
Ferrarotto, F.
Ferroni, F.
Gaspero, M.
Jackson, P. D.
Gioi, L. Li
Mazzoni, M. A.
Morganti, S.
Piredda, G.
Renga, F.
Voena, C.
Ebert, M.
Hartmann, T.
Schroeder, H.
Waldi, R.
Adye, T.
Franek, B.
Olaiya, E. O.
Wilson, F. F.
Emery, S.
Esteve, L.
de Monchenault, G. Hamel
Kozanecki, W.
Vasseur, G.
Yeche, Ch.
Zito, M.
Allen, M. T.
Aston, D.
Bard, D. J.
Bartoldus, R.
Benitez, J. F.
Cenci, R.
Coleman, J. P.
Convery, M. R.
Dingfelder, J. C.
Dorfan, J.
Dubois-Felsmann, G. P.
Dunwoodie, W.
Field, R. C.
Sevilla, M. Franco
Fulsom, B. G.
Gabareen, A. M.
Graham, M. T.
Grenier, P.
Hast, C.
Innes, W. R.
Kaminski, J.
Kelsey, M. H.
Kim, H.
Kim, P.
Kocian, M. L.
Leith, D. W. G. S.
Li, S.
Lindquist, B.
Luitz, S.
Luth, V.
Lynch, H. L.
MacFarlane, D. B.
Marsiske, H.
Messner, R.
Muller, D. R.
Neal, H.
Nelson, S.
O'Grady, C. P.
Ofte, I.
Perl, M.
Ratcliff, B. N.
Roodman, A.
Salnikov, A. A.
Schindler, R. H.
Schwiening, J.
Snyder, A.
Su, D.
Sullivan, M. K.
Suzuki, K.
Swain, S. K.
Thompson, J. M.
Va'vra, J.
Wagner, A. P.
Weaver, M.
West, C. A.
Wisniewski, W. J.
Wittgen, M.
Wright, D. H.
Wulsin, H. W.
Yarritu, A. K.
Young, C. C.
Ziegler, V.
Chen, X. R.
Liu, H.
Park, W.
Purohit, M. V.
White, R. M.
Wilson, J. R.
Bellis, M.
Burchat, P. R.
Edwards, A. J.
Miyashita, T. S.
Ahmed, S.
Alam, M. S.
Ernst, J. A.
Pan, B.
Saeed, M. A.
Zain, S. B.
Soffer, A.
Spanier, S. M.
Wogsland, B. J.
Eckmann, R.
Ritchie, J. L.
Ruland, A. M.
Schilling, C. J.
Schwitters, R. F.
Wray, B. C.
Drummond, B. W.
Izen, J. M.
Lou, X. C.
Bianchi, F.
Gamba, D.
Pelliccioni, M.
Bomben, M.
Bosisio, L.
Cartaro, C.
Della Ricca, G.
Lanceri, L.
Vitale, L.
Azzolini, V.
Lopez-March, N.
Martinez-Vidal, F.
Milanes, D. A.
Oyanguren, A.
Albert, J.
Banerjee, Sw.
Bhuyan, B.
Choi, H. H. F.
Hamano, K.
King, G. J.
Kowalewski, R.
Lewczuk, M. J.
Nugent, I. M.
Roney, J. M.
Sobie, R. J.
Gershon, T. J.
Harrison, P. F.
Ilic, J.
Latham, T. E.
Mohanty, G. B.
Puccio, E. M. T.
Band, H. R.
Chen, X.
Dasu, S.
Flood, K. T.
Pan, Y.
Prepost, R.
Vuosalo, C. O.
Wu, S. L.
CA BaBar Collaboration
TI Observation of the chi(c2)(2P) meson in the reaction gamma gamma ->
D(D)over-bar at BABAR
SO PHYSICAL REVIEW D
LA English
DT Article
ID CROSS-SECTIONS; COLLISIONS
AB A search for the Z(3930) resonance in gamma gamma production of the D (D) over bar system has been performed using a data sample corresponding to an integrated luminosity of 384 fb(-1) recorded by the BABAR experiment at the PEP-II asymmetric-energy electron-positron collider. The D (D) over bar invariant mass distribution shows clear evidence of the Z(3930) state with a significance of 5.8 sigma. We determine mass and width values of (3926.7 +/- 2.7 +/- 1.1) MeV/c(2) and (21.3 +/- 6.8 +/- 3.6) MeV, respectively. A decay angular analysis provides evidence that the Z(3930) is a tensor state with positive parity and C parity (J(PC) = 2(++)); therefore we identify the Z(3930) state as the chi(c2)(2P) meson. The value of the partial width Gamma(gamma gamma) x B(Z(3930) -> D (D) over bar) is found to be (0.24 +/- 0.05 +/- 0.04) keV.
C1 [Aubert, B.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.] Univ Savoie, Lab Annecy Le Vieux Phys Particules LAPP, CNRS, IN2P3, F-74941 Annecy Le Vieux, France.
[Garra Tico, J.; Grauges, E.] Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain.
[Martinelli, M.; Palano, A.; Pappagallo, M.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[Martinelli, M.; Palano, A.; Pappagallo, M.] Univ Bari, Dipartmento Fis, I-70126 Bari, Italy.
[Eigen, G.; Stugu, B.; Sun, L.] Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
[Battaglia, M.; Brown, D. N.; Hooberman, B.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G.; Osipenkov, I. L.; Tackmann, K.; Tanabe, T.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Battaglia, M.; Brown, D. N.; Hooberman, B.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G.; Osipenkov, I. L.; Tackmann, K.; Tanabe, T.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Hawkes, C. M.; Soni, N.; Watson, A. T.] Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
[Koch, H.; Schroeder, T.] Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany.
[Asgeirsson, D. J.; Hearty, C.; Mattison, T. S.; McKenna, J. A.] Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
[Barrett, M.; Khan, A.; Randle-Conde, A.] Brunel Univ, Uxbridge UB8 3PH, Middx, England.
[Blinov, V. E.; Bukin, A. D.; Buzykaev, A. R.; Druzhinin, V. P.; Golubev, V. B.; Onuchin, A. P.; Serednyakov, S. I.; Skovpen, Yu. I.; Solodov, E. P.; Todyshev, K. Yu.] Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
[Bondioli, M.; Curry, S.; Eschrich, I.; Kirkby, D.; Lankford, A. J.; Lund, P.; Mandelkern, M.; Martin, E. C.; Stoker, D. P.] Univ Calif Irvine, Irvine, CA 92697 USA.
[Atmacan, H.; Gary, J. W.; Liu, F.; Long, O.; Vitug, G. M.; Yasin, Z.] Univ Calif Riverside, Riverside, CA 92521 USA.
[Sharma, V.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Campagnari, C.; Hong, T. M.; Kovalskyi, D.; Mazur, M. A.; Richman, J. D.] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
[Beck, T. W.; Eisner, A. M.; Heusch, C. A.; Kroseberg, J.; Lockman, W. S.; Martinez, A. J.; Schalk, T.; Schumm, B. A.; Seiden, A.; Winstrom, L. O.] Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA.
[Cheng, C. H.; Doll, D. A.; Echenard, B.; Fang, F.; Hitlin, D. G.; Narsky, I.; Ongmongkolkul, P.; Piatenko, T.; Porter, F. C.] CALTECH, Pasadena, CA 91125 USA.
[Andreassen, R.; Dubrovin, M. S.; Mancinelli, G.; Meadows, B. T.; Mishra, K.; Sokoloff, M. D.] Univ Cincinnati, Cincinnati, OH 45221 USA.
[Bloom, P. C.; Ford, W. T.; Gaz, A.; Hirschauer, J. F.; Nagel, M.; Nauenberg, U.; Smith, J. G.; Wagner, S. R.] Univ Colorado, Boulder, CO 80309 USA.
[Ayad, R.; Toki, W. H.] Colorado State Univ, Ft Collins, CO 80523 USA.
[Feltresi, E.; Hauke, A.; Jasper, H.; Karbach, T. M.; Merkel, J.; Petzold, A.; Spaan, B.; Wacker, K.] Tech Univ Dortmund, Fak Phys, D-44221 Dortmund, Germany.
[Kobel, M. J.; Schubert, K. R.; Schwierz, R.] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
[Bernard, D.; Latour, E.; Verderi, M.] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
[Clark, P. J.; Playfer, S.; Watson, J. E.] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
[Andreotti, M.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cecchi, A.; Cibinetto, G.; Fioravanti, E.; Franchini, P.; Luppi, E.; Munerato, M.; Negrini, M.; Petrella, A.; Piemontese, L.; Santoro, V.] Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy.
[Andreotti, M.; Calabrese, R.; Cecchi, A.; Cibinetto, G.; Fioravanti, E.; Franchini, P.; Luppi, E.; Munerato, M.; Negrini, M.; Petrella, A.; Santoro, V.] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy.
[Baldini-Ferroli, R.; Calcaterra, A.; de Sangro, R.; Finocchiaro, G.; Pacetti, S.; Patteri, P.; Peruzzi, I. M.; Piccolo, M.; Rama, M.; Zallo, A.] Ist Nazl Fis Nucl, Nazl Frascati Lab, I-00044 Frascati, Italy.
[Contri, R.; Guido, E.; Lo Vetere, M.; Monge, M. R.; Passaggio, S.; Patrignani, C.; Robutti, E.; Tosi, S.] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy.
[Contri, R.; Guido, E.; Lo Vetere, M.; Monge, M. R.; Patrignani, C.; Tosi, S.] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy.
[Morii, M.] Harvard Univ, Cambridge, MA 02138 USA.
[Adametz, A.; Marks, J.; Schenk, S.; Uwer, U.] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany.
[Bernlochner, F. U.; Lacker, H. M.; Lueck, T.; Volk, A.] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany.
[Dauncey, P. D.; Tibbetts, M.] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
[Behera, P. K.; Charles, M. J.; Mallik, U.] Univ Iowa, Iowa City, IA 52242 USA.
[Chen, C.; Cochran, J.; Crawley, H. B.; Dong, L.; Eyges, V.; Meyer, W. T.; Prell, S.; Rosenberg, E. I.; Rubin, A. E.] Iowa State Univ, Ames, IA 50011 USA.
[Gao, Y. Y.; Gritsan, A. V.; Guo, Z. J.] Johns Hopkins Univ, Baltimore, MD 21218 USA.
[Arnaud, N.; Davier, M.; Derkach, D.; da Costa, J. Firmino; Grosdidier, G.; Le Diberder, F.; Lepeltier, V.; Lutz, A. M.; Malaescu, B.; Roudeau, P.; Schune, M. H.; Serrano, J.; Sordini, V.; Stocchi, A.; Wormser, G.] Univ Paris 11, Ctr Sci Orsay, F-91898 Orsay, France.
[Arnaud, N.; Davier, M.; Derkach, D.; da Costa, J. Firmino; Grosdidier, G.; Le Diberder, F.; Lepeltier, V.; Lutz, A. M.; Malaescu, B.; Roudeau, P.; Schune, M. H.; Serrano, J.; Sordini, V.; Stocchi, A.; Wormser, G.] CNRS, IN2P3, Lab Accelerateur Lineaire, F-91898 Orsay, France.
[Lange, D. J.; Wright, D. M.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Bingham, I.; Burke, J. P.; Chavez, C. A.; Fry, J. R.; Gabathuler, E.; Gamet, R.; Hutchcroft, D. E.; Payne, D. J.; Touramanis, C.] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England.
[Bevan, A. J.; Clarke, C. K.; Di Lodovico, F.; Sacco, R.; Sigamani, M.] Univ London, London E1 4NS, England.
[Cowan, G.; Paramesvaran, S.; Wren, A. C.] Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England.
[Brown, D. N.; Davis, C. L.] Univ Louisville, Louisville, KY 40292 USA.
[Denig, A. G.; Fritsch, M.; Gradl, W.; Hafner, A.] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany.
[Alwyn, K. E.; Bailey, D.; Barlow, R. J.; Jackson, G.; Lafferty, G. D.; West, T. J.; Yi, J. I.] Univ Manchester, Manchester M13 9PL, Lancs, England.
[Anderson, J.; Jawahery, A.; Roberts, D. A.; Simi, G.; Tuggle, J. M.] Univ Maryland, College Pk, MD 20742 USA.
[Dallapiccola, C.; Salvati, E.; Cowan, R.] Univ Massachusetts, Amherst, MA 01003 USA.
[Dujmic, D.; Fisher, P. H.; Henderson, S. W.; Sciolla, G.; Spitznagel, M.; Yamamoto, R. K.; Zhao, M.] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
[Patel, P. M.; Robertson, S. H.; Schram, M.] McGill Univ, Montreal, PQ H3A 2T8, Canada.
[Biassoni, P.; Lazzaro, A.; Lombardo, V.; Palombo, F.; Stracka, S.] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy.
[Biassoni, P.; Lazzaro, A.; Palombo, F.; Stracka, S.] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
[Cremaldi, L.; Godang, R.; Kroeger, R.; Sonnek, P.; Summers, D. J.; Zhao, H. W.] Univ Mississippi, University, MS 38677 USA.
[Nguyen, X.; Simard, M.; Taras, P.] Univ Montreal, Montreal, PQ H3C 3J7, Canada.
[Nicholson, H.] Mt Holyoke Coll, S Hadley, MA 01075 USA.
[De Nardo, G.; Lista, L.; Monorchio, D.; Onorato, G.; Sciacca, C.] Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy.
[De Nardo, G.; Monorchio, D.; Onorato, G.; Sciacca, C.] Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy.
[Raven, G.; Snoek, H. L.] Natl Inst Nucl Phys & High Energy Phys, NIKHEF, NL-1009 DB Amsterdam, Netherlands.
[Jessop, C. P.; Knoepfel, K. J.; LoSecco, J. M.; Wang, W. F.] Univ Notre Dame, Notre Dame, IN 46556 USA.
[Corwin, L. A.; Honscheid, K.; Kagan, H.; Kass, R.; Morris, J. P.; Rahimi, A. M.; Sekula, S. J.] Ohio State Univ, Columbus, OH 43210 USA.
[Blount, N. L.; Brau, J.; Frey, R.; Igonkina, O.; Kolb, J. A.; Lu, M.; Rahmat, R.; Sinev, N. B.; Strom, D.; Strube, J.; Torrence, E.] Univ Oregon, Eugene, OR 97403 USA.
[Castelli, G.; Gagliardi, N.; Margoni, M.; Morandin, M.; Posocco, M.; Rotondo, M.; Simonetto, F.; Stroili, R.; Voci, C.] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
[Castelli, G.; Gagliardi, N.; Margoni, M.; Simonetto, F.; Stroili, R.; Voci, C.] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
[Sanchez, P. del Amo; Ben-Haim, E.; Bonneaud, G. R.; Briand, H.; Chauveau, J.; Hamon, O.; Leruste, Ph.; Marchiori, G.; Ocariz, J.; Perez, A.; Prendki, J.; Sitt, S.; Calderini, G.] Univ Denis Diderot Paris7, Univ Paris 06, CNRS, Lab Phys Nucl & Hautes Energies,IN2P3, F-75252 Paris, France.
[Gladney, L.] Univ Penn, Philadelphia, PA 19104 USA.
[Biasini, M.; Manoni, E.] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy.
[Peruzzi, I. M.; Biasini, M.; Manoni, E.] Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
[Angelini, C.; Batignani, G.; Bettarini, S.; Calderini, G.; Carpinelli, M.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Lusiani, A.; Morganti, M.; Neri, N.; Paoloni, E.; Rizzo, G.; Walsh, J. J.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
[Angelini, C.; Batignani, G.; Bettarini, S.; Calderini, G.; Carpinelli, M.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Morganti, M.; Neri, N.; Paoloni, E.; Rizzo, G.] Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy.
[Lusiani, A.] Scuola Normale Super Pisa, I-56127 Pisa, Italy.
[Pegna, D. Lopes; Lu, C.; Olsen, J.; Smith, A. J. S.; Telnov, A. V.] Princeton Univ, Princeton, NJ 08544 USA.
[Anulli, F.; Baracchini, E.; Cavoto, G.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Jackson, P. D.; Gioi, L. Li; Mazzoni, M. A.; Morganti, S.; Piredda, G.; Renga, F.; Voena, C.] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy.
[Baracchini, E.; Faccini, R.; Ferroni, F.; Gaspero, M.; Renga, F.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
[Ebert, M.; Hartmann, T.; Schroeder, H.; Waldi, R.] Univ Rostock, D-18051 Rostock, Germany.
[Adye, T.; Franek, B.; Olaiya, E. O.; Wilson, F. F.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Emery, S.; Esteve, L.; de Monchenault, G. Hamel; Kozanecki, W.; Vasseur, G.; Yeche, Ch.; Zito, M.] CEA, SPP, Ctr Saclay, F-91191 Gif Sur Yvette, France.
[Allen, M. T.; Aston, D.; Bard, D. J.; Bartoldus, R.; Benitez, J. F.; Cenci, R.; Coleman, J. P.; Convery, M. R.; Dingfelder, J. C.; Dorfan, J.; Dubois-Felsmann, G. P.; Dunwoodie, W.; Field, R. C.; Sevilla, M. Franco; Fulsom, B. G.; Gabareen, A. M.; Graham, M. T.; Grenier, P.; Hast, C.; Innes, W. R.; Kaminski, J.; Kelsey, M. H.; Kim, H.; Kim, P.; Kocian, M. L.; Leith, D. W. G. S.; Li, S.; Lindquist, B.; Luitz, S.; Luth, V.; Lynch, H. L.; MacFarlane, D. B.; Marsiske, H.; Messner, R.; Muller, D. R.; Neal, H.; Nelson, S.; O'Grady, C. P.; Ofte, I.; Perl, M.; Ratcliff, B. N.; Roodman, A.; Salnikov, A. A.; Schindler, R. H.; Schwiening, J.; Snyder, A.; Su, D.; Sullivan, M. K.; Suzuki, K.; Swain, S. K.; Thompson, J. M.; Va'vra, J.; Wagner, A. P.; Weaver, M.; West, C. A.; Wisniewski, W. J.; Wittgen, M.; Wright, D. H.; Wulsin, H. W.; Yarritu, A. K.; Young, C. C.; Ziegler, V.] SLAC Natl Accelerator Lab, Stanford, CA 94309 USA.
[Chen, X. R.; Liu, H.; Park, W.; Purohit, M. V.; White, R. M.; Wilson, J. R.] Univ S Carolina, Columbia, SC 29208 USA.
[Bellis, M.; Burchat, P. R.; Edwards, A. J.; Miyashita, T. S.] Stanford Univ, Stanford, CA 94305 USA.
[Ahmed, S.; Alam, M. S.; Ernst, J. A.; Pan, B.; Saeed, M. A.; Zain, S. B.] SUNY Albany, Albany, NY 12222 USA.
[Soffer, A.] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel.
[Spanier, S. M.; Wogsland, B. J.] Univ Tennessee, Knoxville, TN 37996 USA.
[Eckmann, R.; Ritchie, J. L.; Ruland, A. M.; Schilling, C. J.; Schwitters, R. F.; Wray, B. C.] Univ Texas Austin, Austin, TX 78712 USA.
[Drummond, B. W.; Izen, J. M.; Lou, X. C.] Univ Texas Dallas, Richardson, TX 75083 USA.
[Bianchi, F.; Gamba, D.; Pelliccioni, M.] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy.
[Bianchi, F.; Gamba, D.; Pelliccioni, M.] Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
[Bomben, M.; Bosisio, L.; Cartaro, C.; Della Ricca, G.; Lanceri, L.; Vitale, L.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
[Bomben, M.; Bosisio, L.; Cartaro, C.; Della Ricca, G.; Lanceri, L.; Vitale, L.] Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy.
[Azzolini, V.; Lopez-March, N.; Martinez-Vidal, F.; Milanes, D. A.; Oyanguren, A.] Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain.
[Albert, J.; Banerjee, Sw.; Bhuyan, B.; Choi, H. H. F.; Hamano, K.; King, G. J.; Kowalewski, R.; Lewczuk, M. J.; Nugent, I. M.; Roney, J. M.; Sobie, R. J.] Univ Victoria, Victoria, BC V8W 3P6, Canada.
[Gershon, T. J.; Harrison, P. F.; Ilic, J.; Latham, T. E.; Mohanty, G. B.; Puccio, E. M. T.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
[Band, H. R.; Chen, X.; Dasu, S.; Flood, K. T.; Pan, Y.; Prepost, R.; Vuosalo, C. O.; Wu, S. L.] Univ Wisconsin, Madison, WI 53706 USA.
[Carpinelli, M.] Univ Sassari, I-07100 Sassari, Italy.
RP Aubert, B (reprint author), Univ Savoie, Lab Annecy Le Vieux Phys Particules LAPP, CNRS, IN2P3, F-74941 Annecy Le Vieux, France.
RI White, Ryan/E-2979-2015; Calabrese, Roberto/G-4405-2015; Neri,
Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Rotondo,
Marcello/I-6043-2012; de Sangro, Riccardo/J-2901-2012; Saeed, Mohammad
Alam/J-7455-2012; Negrini, Matteo/C-8906-2014; Patrignani,
Claudia/C-5223-2009; Monge, Maria Roberta/G-9127-2012; Oyanguren,
Arantza/K-6454-2014; Luppi, Eleonora/A-4902-2015; Martinez Vidal,
F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere,
Maurizio/J-5049-2012; Lusiani, Alberto/N-2976-2015; Morandin,
Mauro/A-3308-2016; Lusiani, Alberto/A-3329-2016; Stracka,
Simone/M-3931-2015; Della Ricca, Giuseppe/B-6826-2013; Di Lodovico,
Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Calcaterra,
Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016
OI White, Ryan/0000-0003-3589-5900; Calabrese, Roberto/0000-0002-1354-5400;
Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965;
Rotondo, Marcello/0000-0001-5704-6163; de Sangro,
Riccardo/0000-0002-3808-5455; Saeed, Mohammad Alam/0000-0002-3529-9255;
Negrini, Matteo/0000-0003-0101-6963; Patrignani,
Claudia/0000-0002-5882-1747; Monge, Maria Roberta/0000-0003-1633-3195;
Oyanguren, Arantza/0000-0002-8240-7300; Luppi,
Eleonora/0000-0002-1072-5633; Raven, Gerhard/0000-0002-2897-5323;
Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky,
Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480;
Lusiani, Alberto/0000-0002-6876-3288; Morandin,
Mauro/0000-0003-4708-4240; Lusiani, Alberto/0000-0002-6876-3288;
Stracka, Simone/0000-0003-0013-4714; Della Ricca,
Giuseppe/0000-0003-2831-6982; Di Lodovico,
Francesca/0000-0003-3952-2175; Pappagallo, Marco/0000-0001-7601-5602;
Calcaterra, Alessandro/0000-0003-2670-4826; Frey,
Raymond/0000-0003-0341-2636
FU U.S. Department of Energy; National Science Foundation; Natural Sciences
and Engineering Research Council (Canada); Commissariat a l'Energie
Atomique and Institut National de Physique Nucleaire et de Physique des
Particules (France); Bundesministerium fur Bildung und Forschung and
Deutsche Forschungsgemeinschaft (Germany); Istituto Nazionale di Fisica
Nucleare (Italy); Foundation for Fundamental Research on Matter (The
Netherlands); Research Council of Norway; Ministry of Education and
Science of the Russian Federation; Ministerio de Educacion y Ciencia
(Spain); Science and Technology Facilities Council (United Kingdom);
European Union; A.P. Sloan Foundation
FX We are grateful for the extraordinary contributions of our PEP-II
colleagues in achieving the excellent luminosity and machine conditions
that have made this work possible. The success of this project also
relies critically on the expertise and dedication of the computing
organizations that support BABAR. The collaborating institutions wish to
thank SLAC for its support and the kind hospitality extended to them.
This work is supported by the U.S. Department of Energy and National
Science Foundation, the Natural Sciences and Engineering Research
Council (Canada), the Commissariat a l'Energie Atomique and Institut
National de Physique Nucleaire et de Physique des Particules (France),
the Bundesministerium fur Bildung und Forschung and Deutsche
Forschungsgemeinschaft (Germany), the Istituto Nazionale di Fisica
Nucleare (Italy), the Foundation for Fundamental Research on Matter (The
Netherlands), the Research Council of Norway, the Ministry of Education
and Science of the Russian Federation, Ministerio de Educacion y Ciencia
(Spain), and the Science and Technology Facilities Council (United
Kingdom). Individuals have received support from the Marie-Curie IEF
program (European Union) and the A.P. Sloan Foundation.
NR 39
TC 47
Z9 47
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY 1
PY 2010
VL 81
IS 9
AR 092003
DI 10.1103/PhysRevD.81.092003
PG 16
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 602NC
UT WOS:000278145100007
ER
PT J
AU Brodsky, SJ
de Teramond, GF
Deur, A
AF Brodsky, Stanley J.
de Teramond, Guy F.
Deur, Alexandre
TI Nonperturbative QCD coupling and its beta function from light-front
holography
SO PHYSICAL REVIEW D
LA English
DT Article
ID DEEP-INELASTIC SCATTERING; QUANTUM CHROMODYNAMICS; SUM-RULE; EFFECTIVE
CHARGES; SPIN ASYMMETRIES; MAGNETIC MOMENTS; NUCLEON; CONSTANT; MODEL;
AMBIGUITIES
AB The light-front holographic mapping of classical gravity in anti-de Sitter space, modified by a positive-sign dilaton background, leads to a nonperturbative effective coupling alpha(AdS)(s)(Q(2)). It agrees with hadron physics data extracted from different observables, such as the effective charge defined by the Bjorken sum rule, as well as with the predictions of models with built-in confinement and lattice simulations. It also displays a transition from perturbative to nonperturbative conformal regimes at a momentum scale similar to 1 GeV. The resulting beta function appears to capture the essential characteristics of the full beta function of QCD, thus giving further support to the application of the gauge/gravity duality to the confining dynamics of strongly coupled QCD. Commensurate scale relations relate observables to each other without scheme or scale ambiguity. In this paper we extrapolate these relations to the nonperturbative domain, thus extending the range of predictions based on alpha(AdS)(s)(Q(2)).
C1 [Brodsky, Stanley J.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94309 USA.
[Brodsky, Stanley J.] Univ So Denmark, Origins CP3, DK-5230 Odense M, Denmark.
[de Teramond, Guy F.] Univ Costa Rica, San Jose, Costa Rica.
[Deur, Alexandre] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
RP Brodsky, SJ (reprint author), Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94309 USA.
FU Department of Energy [DE-AC02-76SF00515]; U.S. Department of Energy
(DOE); Southern Denmark University; [DE-AC05-84ER40150]
FX We thank A. Radyushkin for helpful, critical remarks. We also thank V.
Burkert, J. Cornwall, H. G. Dosch, J. Erlich, P. Hagler, W. Korsch, J.
Kuhn, G. P. Lepage, T. Okui, and J. Papavassiliou for helpful comments.
We thank S. Furui for sending us his recent lattice results. This
research was supported by the Department of Energy under Contract No.
DE-AC02-76SF00515. A. D.'s work is supported by the U.S. Department of
Energy (DOE). The Jefferson Science Associates (JSA) operates the Thomas
Jefferson National Accelerator Facility for the DOE under Contract No.
DE-AC05-84ER40150. S. J. B. thanks the Hans Christian Andersen Academy
and the CP3 -Origins Institute for their support at Southern
Denmark University.
NR 89
TC 92
Z9 92
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
EI 1550-2368
J9 PHYS REV D
JI Phys. Rev. D
PD MAY 1
PY 2010
VL 81
IS 9
AR 096010
DI 10.1103/PhysRevD.81.096010
PG 13
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 602NC
UT WOS:000278145100090
ER
PT J
AU Del Debbio, L
Patella, A
Pica, C
AF Del Debbio, Luigi
Patella, Agostino
Pica, Claudio
TI Higher representations on the lattice: Numerical simulations, SU(2) with
adjoint fermions
SO PHYSICAL REVIEW D
LA English
DT Article
ID HYBRID MONTE-CARLO; SYMMETRY-BREAKING; GAUGE-THEORIES; HMC ALGORITHM;
DYNAMICS; QCD; SUPERSYMMETRY; TECHNICOLOR; FLAVORS
AB We discuss the lattice formulation of gauge theories with fermions in arbitrary representations of the color group and present in detail the implementation of the hybrid Monte Carlo (HMC)/rational HMC algorithm for simulating dynamical fermions. We discuss the validation of the implementation through an extensive set of tests and the stability of simulations by monitoring the distribution of the lowest eigenvalue of the Wilson-Dirac operator. Working with two flavors of Wilson fermions in the adjoint representation, benchmark results for realistic lattice simulations are presented. Runs are performed on different lattice sizes ranging from 4(3) x 8 to 24(3) x 64 sites. For the two smallest lattices we also report the measured values of benchmark mesonic observables. These results can be used as a baseline for rapid cross-checks of simulations in higher representations. The results presented here are the first steps toward more extensive investigations with controlled systematic errors, aiming at a detailed understanding of the phase structure of these theories, and of their viability as candidates for strong dynamics beyond the standard model.
C1 [Del Debbio, Luigi] Univ Edinburgh, Sch Phys & Astron, SUPA, Edinburgh EH9 3JZ, Midlothian, Scotland.
[Patella, Agostino] Swansea Univ, Sch Phys, Swansea SA2 8PP, W Glam, Wales.
[Pica, Claudio] Univ So Denmark, Origins CP3, DK-5230 Odense M, Denmark.
[Pica, Claudio] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Del Debbio, L (reprint author), Univ Edinburgh, Sch Phys & Astron, SUPA, Edinburgh EH9 3JZ, Midlothian, Scotland.
EM luigi.del.debbio@ed.ac.uk; a.patella@swan.ac.uk; pica@cp3.sdu.dk
OI Pica, Claudio/0000-0002-0569-0376; Del Debbio, Luigi/0000-0003-4246-3305
FU SUPA; STFC; U.S. Department of Energy [DE-AC02-98CH10886]; "Fondazione
Angelo Della Riccia"
FX During the long gestation of this work, we have enjoyed discussing its
progress with many people. We want to thank Adi Armoni, Francis Bursa,
Simon Catterall, Biagio Lucini, Martin Luscher, Francesco Sannino, Misha
Shifman, and Gabriele Veneziano for discussions about various aspects of
this work. L. D. D. acknowledges the kind hospitality of the Isaac
Newton Institute, CERN, and Odense University while this work was
progressing. Workshops at the INI, the Niels Bohr Institute, and
Edinburgh provided a lively atmosphere for discussions. We thank SUPA
for funding the workshop in Edinburgh. L. D. D. is funded by STFC. The
work of C. P. has been supported by Contract No. DE-AC02-98CH10886 with
the U.S. Department of Energy during the initial stages of this work. A.
P. is supported by an STFC special project grant and by the "Fondazione
Angelo Della Riccia.''
NR 68
TC 59
Z9 59
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY 1
PY 2010
VL 81
IS 9
AR 094503
DI 10.1103/PhysRevD.81.094503
PG 16
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 602NC
UT WOS:000278145100058
ER
PT J
AU Dumitru, A
Jalilian-Marian, J
AF Dumitru, Adrian
Jalilian-Marian, Jamal
TI Two-particle correlations in high-energy collisions and the gluon
four-point function
SO PHYSICAL REVIEW D
LA English
DT Article
ID COLOR GLASS CONDENSATE; AZIMUTHAL CORRELATIONS; RENORMALIZATION-GROUP;
DIJET PRODUCTION; SMALL-X; EVOLUTION; QCD; EQUATION
AB We derive the rapidity evolution equation for the gluon four-point function in the dilute regime and at small x from the JIMWLK functional equation. We show that beyond leading order in N-c the mean field (Gaussian) approximation where the four-point function is factorized into a product of two-point functions is violated. We calculate these factorization breaking terms and show that they contribute at leading order in N-c to correlations of two produced gluons as a function of their relative rapidity and azimuthal angle, for generic (rather than back-to-back) angles. Such two-particle correlations have been studied experimentally at the BNL-RHIC collider and could be scrutinized also for pp (and, in the future, also AA) collisions at the CERN-LHC accelerator.
C1 [Dumitru, Adrian] Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA.
[Dumitru, Adrian; Jalilian-Marian, Jamal] CUNY, Baruch Coll, Dept Nat Sci, New York, NY 10010 USA.
[Dumitru, Adrian; Jalilian-Marian, Jamal] CUNY, Grad Sch, New York, NY 10016 USA.
[Dumitru, Adrian; Jalilian-Marian, Jamal] CUNY, Univ Ctr, New York, NY 10016 USA.
RP Dumitru, A (reprint author), Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA.
FU DOE Office of Nuclear Physics [DE-FG02-09ER41620]; City University of
New York [60060-3940, 62625-40]
FX We have used the JaxoDraw program [14] to draw the diagrams shown in
this paper. J. J-M. thanks A. Kovner for useful discussions. We
gratefully acknowledge support by the DOE Office of Nuclear Physics
through Grant No. DE-FG02-09ER41620 and from The City University of New
York through the PSC-CUNY Research Award Program, Grant Nos. 60060-3940
(A. D.) and 62625-40 (J. J. M.).
NR 43
TC 46
Z9 46
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY 1
PY 2010
VL 81
IS 9
AR 094015
DI 10.1103/PhysRevD.81.094015
PG 6
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 602NC
UT WOS:000278145100033
ER
PT J
AU Elor, G
Goh, HS
Hall, LJ
Kumar, P
Nomura, Y
AF Elor, Gilly
Goh, Hock-Seng
Hall, Lawrence J.
Kumar, Piyush
Nomura, Yasunori
TI Environmentally selected WIMP dark matter with high-scale supersymmetry
breaking
SO PHYSICAL REVIEW D
LA English
DT Article
ID STANDARD MODEL; COSMOLOGICAL CONSTANT; SPLIT SUPERSYMMETRY; SUPERNOVAE;
PHYSICS; BOSON
AB We explore the possibility that both the weak scale and the thermal relic dark matter abundance are environmentally selected in a multiverse. An underlying supersymmetric theory containing the states of the minimal supersymmetric standard model (MSSM) and singlets, with supersymmetry and R symmetry broken at unified scales, has just two realistic low-energy effective theories. One theory (SM + (w) over tilde) is the standard model augmented only by the wino, having a mass near 3 TeV, and has a Higgs boson mass in the range of (127-142) GeV. The other theory (SM + (h) over tilde/(s) over tilde)) has Higgsinos and a singlino added to the standard model. The Higgs boson mass depends on the single new Yukawa coupling of the theory, y, and is near 141 GeV for small y but grows to be as large as 210 GeV as this new coupling approaches strong coupling at high energies. Much of the parameter space of this theory will be probed by direct detection searches for dark matter that push 2 orders of magnitude below the present bounds; furthermore, the dark matter mass and cross section on nucleons are correlated with the Higgs boson mass. The indirect detection signal of monochromatic photons from the Galactic center is computed, and the range of parameters that may be accessible to LHC searches for trilepton events is explored. Taking a broader view, allowing the possibility of R symmetry protection to the TeV scale or axion dark matter, we find four more theories: (SM + axion), two versions of split supersymmetry, and the E-MSSM, where a little supersymmetric hierarchy is predicted. The special Higgs mass value of (141 +/- 2)GeV appears in symmetry limits of three of the six theories, (SM + axion), (SM + (w) over tilde), and (SM + (h) over tilde/(s) over tilde), motivating a comparison of other signals of these three theories.
C1 [Elor, Gilly; Goh, Hock-Seng; Hall, Lawrence J.; Kumar, Piyush; Nomura, Yasunori] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley Ctr Theoret Phys, Berkeley, CA 94720 USA.
[Elor, Gilly; Goh, Hock-Seng; Hall, Lawrence J.; Kumar, Piyush; Nomura, Yasunori] Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA.
[Hall, Lawrence J.; Nomura, Yasunori] Univ Tokyo, Inst Phys & Math Universe, Kashiwa, Chiba 2778568, Japan.
RP Elor, G (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley Ctr Theoret Phys, Berkeley, CA 94720 USA.
OI Kumar, Piyush/0000-0003-4894-4468; Nomura, Yasunori/0000-0002-1497-1479
FU Office of Science, Office of High Energy and Nuclear Physics, of the US
Department of Energy [DE-AC02-05CH11231]; National Science Foundation
[PHY-0457315, PHY-0555661, PHY-0855653]
FX P. K. thanks Hitoshi Murayama and Tomer Volansky for useful discussions.
This work was supported in part by the Director, Office of Science,
Office of High Energy and Nuclear Physics, of the US Department of
Energy under Contract No. DE-AC02-05CH11231, and in part by the National
Science Foundation under Grants No. PHY-0457315, No. PHY-0555661, and
No. PHY-0855653.
NR 59
TC 12
Z9 12
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY 1
PY 2010
VL 81
IS 9
AR 095003
DI 10.1103/PhysRevD.81.095003
PG 18
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 602NC
UT WOS:000278145100064
ER
PT J
AU Franco, S
Kachru, S
AF Franco, Sebastian
Kachru, Shamit
TI Single-sector supersymmetry breaking in supersymmetric QCD
SO PHYSICAL REVIEW D
LA English
DT Article
ID FLAVOR PROBLEM; GAUGE-THEORIES; NATURALNESS; DUALITY
AB We construct examples of single-sector supersymmetry breaking based on simple deformations of supersymmetric QCD with (weakly) gauged flavor group. These theories are calculable in a weakly coupled Seiberg dual description. In these models, some of the particles in the first two generations of quarks and leptons are composites of the same strong dynamics which leads to dynamical supersymmetry breaking. Such models can explain the hierarchies of Yukawa couplings in the standard model, in a way that predictively correlates with the spectrum of supersymmetry-breaking soft terms.
C1 [Franco, Sebastian; Kachru, Shamit] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA.
[Kachru, Shamit] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA.
[Kachru, Shamit] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
[Kachru, Shamit] Stanford Univ, SLAC, Stanford, CA 94305 USA.
RP Franco, S (reprint author), Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA.
EM sfranco@kitp.ucsb.edu; skachru@kitp.ucsb.edu
FU Stanford Institute for Theoretical Physics; NSF [PHY-0244728]; DOE
[DE-AC03-76SF00515]; National Science Foundation [PHY05-51164]
FX We would like to thank F. Benini, A. Dymarsky, D. Simic, and H. Verlinde
for enjoyable collaborations on related issues, using the different
technique of gauge/gravity duality. S.F. would like to thank G. Torroba
for very interesting discussions. S.K. also thanks S. Dimopoulos, T.
Gherghetta, and J. Wacker for enjoyable discussions in 2007 which
stimulated his interest in this subject. S. K. acknowledges the
hospitality of the Kavli Institute for Theoretical Physics and the Aspen
Center for Physics while this work was in progress. S.K. was supported
in part by the Stanford Institute for Theoretical Physics, the NSF under
Grant No. PHY-0244728, and the DOE under Contract No. DE-AC03-76SF00515.
S.F. and S.K. both acknowledge the support of the National Science
Foundation under Grant No. PHY05-51164.
NR 22
TC 22
Z9 22
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY 1
PY 2010
VL 81
IS 9
AR 095020
DI 10.1103/PhysRevD.81.095020
PG 10
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 602NC
UT WOS:000278145100080
ER
PT J
AU Kribs, GD
Roy, TS
Terning, J
Zurek, KM
AF Kribs, Graham D.
Roy, Tuhin S.
Terning, John
Zurek, Kathryn M.
TI Quirky composite dark matter
SO PHYSICAL REVIEW D
LA English
DT Article
ID FERMION-NUMBER VIOLATION; HEAVY QUARKONIUM; FIELD-THEORIES; QCD;
COSMOLOGY; PHYSICS; BARYON; PUZZLE; ATOMS; HALOS
AB We propose a new dark matter candidate, "quirky dark matter,'' that is a scalar baryonic bound state of a new non-Abelian force that becomes strong below the electroweak scale. The bound state is made of chiral quirks: new fermions that transform under both the new strong force as well as in a chiral representation of the electroweak group, acquiring mass from the Higgs mechanism. Electric charge neutrality of the lightest baryon requires approximately degenerate quirk masses which also causes the charge radius of the bound state to be negligible. The abundance is determined by an asymmetry that is linked to the baryon and lepton numbers of the universe through electroweak sphalerons. Dark matter elastic scattering with nuclei proceeds through Higgs exchange as well as an electromagnetic polarizability operator which is just now being tested in direct detection experiments. A novel method to search for quirky dark matter is to look for a gamma-ray "dark line'' spectroscopic feature in galaxy clusters that result from the quirky Lyman-alpha or quirky hyperfine transitions. Colliders are expected to dominantly produce quirky mesons, not quirky baryons, consequently large missing energy is not the primary collider signal of the physics associated with quirky dark matter.
C1 [Kribs, Graham D.; Roy, Tuhin S.] Univ Oregon, Dept Phys, Eugene, OR 97403 USA.
[Terning, John] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
[Zurek, Kathryn M.] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
[Zurek, Kathryn M.] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
RP Kribs, GD (reprint author), Univ Oregon, Dept Phys, Eugene, OR 97403 USA.
OI Terning, John/0000-0003-1367-0575
NR 68
TC 78
Z9 78
U1 1
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY 1
PY 2010
VL 81
IS 9
AR 095001
DI 10.1103/PhysRevD.81.095001
PG 16
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 602NC
UT WOS:000278145100062
ER
PT J
AU Lisanti, M
Wacker, JG
AF Lisanti, Mariangela
Wacker, Jay G.
TI Disentangling dark matter dynamics with directional detection
SO PHYSICAL REVIEW D
LA English
DT Article
ID NUCLEAR RECOIL; LIMITS; PARTICLES; ELECTRONS; ENERGIES; DAMA/NAI;
SEARCH; EXCESS; HALO
AB Inelastic dark matter reconciles the DAMA anomaly with other null direct detection experiments and points to a nonminimal structure in the dark matter sector. In addition to the dominant inelastic interaction, dark matter scattering may have a subdominant elastic component. If these elastic interactions are suppressed at low momentum transfer, they will have similar nuclear recoil spectra to inelastic scattering events. While upcoming direct detection experiments will see strong signals from such models, they may not be able to unambiguously determine the presence of the subdominant elastic scattering from the recoil spectra alone. We show that directional detection experiments can separate elastic and inelastic scattering events and discover the underlying dynamics of dark matter models.
C1 [Lisanti, Mariangela; Wacker, Jay G.] SLAC, Theory Grp, Menlo Pk, CA 94025 USA.
RP Lisanti, M (reprint author), SLAC, Theory Grp, Menlo Pk, CA 94025 USA.
FU U.S. DOE [DE-AC02-76SF00515]; Stanford Institute for Theoretical
Physics; NSF
FX We thank Spencer Chang, Liam Fitzpatrick, Aaron Pierce, Philip Schuster,
Natalia Toro, and Neal Weiner for useful discussions. We thank the
Galileo Galilei Institute for their hospitality during the later stages
of this work. M. L. and J. G. W. are supported by the U.S. DOE under
Contract No. DE-AC02-76SF00515 and receive partial support from the
Stanford Institute for Theoretical Physics. M. L. is supported by the
NSF. J. G. W. is partially supported by the U.S. DOE.
NR 64
TC 16
Z9 16
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY 1
PY 2010
VL 81
IS 9
AR 096005
DI 10.1103/PhysRevD.81.096005
PG 7
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 602NC
UT WOS:000278145100085
ER
PT J
AU Liu, LM
Lin, HW
Orginos, K
Walker-Loud, A
AF Liu, Liuming
Lin, Huey-Wen
Orginos, Kostas
Walker-Loud, Andre
TI Singly and doubly charmed J=1/2 baryon spectrum from lattice QCD
SO PHYSICAL REVIEW D
LA English
DT Article
ID CHIRAL PERTURBATION-THEORY; HEAVY QUARKS; FERMIONS; MASSES; PHYSICS;
SYMMETRIES; EXPANSION; DECAY; MODEL
AB We compute the masses of the singly and doubly charmed baryons in full QCD using the relativistic Fermilab action for the charm quark. For the light quarks we use domain-wall fermions in the valence sector and improved Kogut-Susskind sea quarks. We use the low-lying charmonium spectrum to tune our heavy-quark action and as a guide to understanding the discretization errors associated with the heavy quark. Our results are in good agreement with experiment within our systematics. For the Xi(cc), we find the isospin-averaged mass to be M-Xi cc 3665 +/- 17 +/- 14(-78)(+0) MeV; the three given uncertainties are statistical, systematic, and an estimate of lattice discretization errors, respectively. In addition, we predict the mass splitting of the (isospin-averaged) spin-1/2 Omega(cc) with the Xi(cc) to be M-Omega cc - M-Xi cc = 98 +/- 9 +/- 22 +/- 13 MeV (in this mass splitting, the leading discretization errors are also suppressed by SU(3) symmetry). Combining this splitting with our determination of M-Xi cc leads to our prediction of the spin-1/2 Omega(cc) mass, M Omega(cc) = 3763 +/- 19 +/- 26(-79)(+13) MeV.
C1 [Liu, Liuming; Orginos, Kostas; Walker-Loud, Andre] Coll William, Dept Phys, Williamsburg, VA 23187 USA.
[Liu, Liuming; Lin, Huey-Wen; Orginos, Kostas] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
[Lin, Huey-Wen] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
RP Liu, LM (reprint author), Coll William, Dept Phys, Williamsburg, VA 23187 USA.
EM lxliux@wm.edu
FU USQCD SciDAC; Jeffress Memorial Trust [J-813]; Jefferson Science
Associates under U.S. DOE [DE-AC05-06OR23177]; U.S. Department of Energy
[DE-FG03-97ER4014]; DOE OJI [DE-FG02-07ER41527, DE-FG02-04ER41302]
FX A. W. L. and K. O. would like to thank Brian Tiburzi for helpful
discussions. We would like to thank Heechang Na and Steve Gotlieb for
providing us with their spectrum numbers from Ref. [25]. We thank the
NPLQCD collaboration for sharing their propagators: most of the
light-quark and all of the strange-quark propagators used in this work;
we also thank LHPC for some light-quark propagators. We would also like
to thank Jo Dudek for a careful reading of our manuscript. These
calculations were performed using the Chroma software suite [103], on
computer clusters at Jefferson Laboratory (USQCD SciDAC supported) and
the College of William and Mary (Cyclades cluster supported by the
Jeffress Memorial Trust grant J-813). L. L. and H. L. are supported by
Jefferson Science Associates, L. L. under U.S. DOE Contract No.
DE-AC05-06OR23177. HL is also supported by the U.S. Department of Energy
under Grant No. DE-FG03-97ER4014. K. O. is supported in part by the
Jeffress Memorial Trust grant J-813, DOE OJI Grant No. DE-FG02-07ER41527
and DOE Grant No. DE-FG02-04ER41302. A. W. L. is supported under the
U.S. DOE OJI Grant No. DE-FG02-07ER-41527.
NR 103
TC 36
Z9 37
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD MAY 1
PY 2010
VL 81
IS 9
AR 094505
DI 10.1103/PhysRevD.81.094505
PG 18
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 602NC
UT WOS:000278145100060
ER
PT J
AU Wendell, R
Ishihara, C
Abe, K
Hayato, Y
Iida, T
Ikeda, M
Iyogi, K
Kameda, J
Kobayashi, K
Koshio, Y
Kozuma, Y
Miura, M
Moriyama, S
Nakahata, M
Nakayama, S
Obayashi, Y
Ogawa, H
Sekiya, H
Shiozawa, M
Suzuki, Y
Takeda, A
Takenaga, Y
Takeuchi, Y
Ueno, K
Ueshima, K
Watanabe, H
Yamada, S
Yokozawa, T
Hazama, S
Kaji, H
Kajita, T
Kaneyuki, K
McLachlan, T
Okumura, K
Shimizu, Y
Tanimoto, N
Vagins, MR
Dufour, F
Kearns, E
Litos, M
Raaf, JL
Stone, JL
Sulak, LR
Wang, W
Goldhaber, M
Bays, K
Casper, D
Cravens, JP
Kropp, WR
Mine, S
Regis, C
Smy, MB
Sobel, HW
Ganezer, KS
Hill, J
Keig, WE
Jang, JS
Kim, JY
Lim, IT
Albert, J
Fechner, M
Scholberg, K
Walter, CW
Tasaka, S
Learned, JG
Matsuno, S
Watanabe, Y
Hasegawa, T
Ishida, T
Ishii, T
Kobayashi, T
Nakadaira, T
Nakamura, K
Nishikawa, K
Nishino, H
Oyama, Y
Sakashita, K
Sekiguchi, T
Tsukamoto, T
Suzuki, AT
Minamino, A
Nakaya, T
Fukuda, Y
Itow, Y
Mitsuka, G
Tanaka, T
Jung, CK
Lopez, G
McGrew, C
Yanagisawa, C
Tamura, N
Ishino, H
Kibayashi, A
Mino, S
Mori, T
Sakuda, M
Toyota, H
Kuno, Y
Yoshida, M
Kim, SB
Yang, BS
Ishizuka, T
Okazawa, H
Choi, Y
Nishijima, K
Yokosawa, Y
Koshiba, M
Yokoyama, M
Totsuka, Y
Chen, S
Heng, Y
Yang, Z
Zhang, H
Kielczewska, D
Mijakowski, P
Connolly, K
Dziomba, M
Thrane, E
Wilkes, RJ
AF Wendell, R.
Ishihara, C.
Abe, K.
Hayato, Y.
Iida, T.
Ikeda, M.
Iyogi, K.
Kameda, J.
Kobayashi, K.
Koshio, Y.
Kozuma, Y.
Miura, M.
Moriyama, S.
Nakahata, M.
Nakayama, S.
Obayashi, Y.
Ogawa, H.
Sekiya, H.
Shiozawa, M.
Suzuki, Y.
Takeda, A.
Takenaga, Y.
Takeuchi, Y.
Ueno, K.
Ueshima, K.
Watanabe, H.
Yamada, S.
Yokozawa, T.
Hazama, S.
Kaji, H.
Kajita, T.
Kaneyuki, K.
McLachlan, T.
Okumura, K.
Shimizu, Y.
Tanimoto, N.
Vagins, M. R.
Dufour, F.
Kearns, E.
Litos, M.
Raaf, J. L.
Stone, J. L.
Sulak, L. R.
Wang, W.
Goldhaber, M.
Bays, K.
Casper, D.
Cravens, J. P.
Kropp, W. R.
Mine, S.
Regis, C.
Smy, M. B.
Sobel, H. W.
Ganezer, K. S.
Hill, J.
Keig, W. E.
Jang, J. S.
Kim, J. Y.
Lim, I. T.
Albert, J.
Fechner, M.
Scholberg, K.
Walter, C. W.
Tasaka, S.
Learned, J. G.
Matsuno, S.
Watanabe, Y.
Hasegawa, T.
Ishida, T.
Ishii, T.
Kobayashi, T.
Nakadaira, T.
Nakamura, K.
Nishikawa, K.
Nishino, H.
Oyama, Y.
Sakashita, K.
Sekiguchi, T.
Tsukamoto, T.
Suzuki, A. T.
Minamino, A.
Nakaya, T.
Fukuda, Y.
Itow, Y.
Mitsuka, G.
Tanaka, T.
Jung, C. K.
Lopez, G.
McGrew, C.
Yanagisawa, C.
Tamura, N.
Ishino, H.
Kibayashi, A.
Mino, S.
Mori, T.
Sakuda, M.
Toyota, H.
Kuno, Y.
Yoshida, M.
Kim, S. B.
Yang, B. S.
Ishizuka, T.
Okazawa, H.
Choi, Y.
Nishijima, K.
Yokosawa, Y.
Koshiba, M.
Yokoyama, M.
Totsuka, Y.
Chen, S.
Heng, Y.
Yang, Z.
Zhang, H.
Kielczewska, D.
Mijakowski, P.
Connolly, K.
Dziomba, M.
Thrane, E.
Wilkes, R. J.
CA Super-Kamiokande Collaboration
TI Atmospheric neutrino oscillation analysis with subleading effects in
Super-Kamiokande I, II, and III
SO PHYSICAL REVIEW D
LA English
DT Article
ID LONG-BASE-LINE; DETECTOR; PHYSICS; SEARCH; MODEL
AB We present a search for nonzero theta(13) and deviations of sin(2)theta(23) from 0.5 in the oscillations of atmospheric neutrino data from Super-Kamiokande I, II, and III. No distortions of the neutrino flux consistent with nonzero theta(13) are found and both neutrino mass hierarchy hypotheses are in agreement with the data. The data are best fit at Delta m(2) = 2.1 x 10(-3) eV(2), sin(2)theta(13) = 0.0, and sin(2)theta(23) = 0.5. In the normal (inverted) hierarchy theta(13) and Delta m(2) are constrained at the one-dimensional 90% C.L. to sin(2)theta(13) < 0.04(0.09) and 1.9(1.7) x 10(-3) < Delta m(2) < 2.6(2.7) x 10(-3) eV(2). The atmospheric mixing angle is within 0.407 <= sin(2)theta(23) <= 0.583 at 90% C.L.
C1 [Wendell, R.; Albert, J.; Fechner, M.; Scholberg, K.; Walter, C. W.] Duke Univ, Dept Phys, Durham, NC 27708 USA.
[Abe, K.; Hayato, Y.; Iida, T.; Ikeda, M.; Iyogi, K.; Kameda, J.; Kobayashi, K.; Koshio, Y.; Kozuma, Y.; Miura, M.; Moriyama, S.; Nakahata, M.; Nakayama, S.; Obayashi, Y.; Ogawa, H.; Sekiya, H.; Shiozawa, M.; Suzuki, Y.; Takeda, A.; Takenaga, Y.; Takeuchi, Y.; Ueno, K.; Ueshima, K.; Watanabe, H.; Yamada, S.; Yokozawa, T.] Univ Tokyo, Inst Cosm Ray Res, Kamioka Observ, Gifu 5061205, Japan.
[Ishihara, C.; Hazama, S.; Kaji, H.; Kajita, T.; Kaneyuki, K.; McLachlan, T.; Okumura, K.; Shimizu, Y.; Tanimoto, N.] Univ Tokyo, Inst Cosm Ray Res, Res Ctr Cosm Neutrinos, Chiba 2778582, Japan.
[Hayato, Y.; Moriyama, S.; Nakahata, M.; Shiozawa, M.; Suzuki, Y.; Takeuchi, Y.; Kajita, T.; Kaneyuki, K.; Vagins, M. R.; Kearns, E.; Stone, J. L.; Sobel, H. W.; Scholberg, K.; Walter, C. W.; Nakamura, K.; Nakaya, T.] Univ Tokyo, Inst Phys & Math Universe, Chiba 2778582, Japan.
[Dufour, F.; Kearns, E.; Litos, M.; Raaf, J. L.; Stone, J. L.; Sulak, L. R.; Wang, W.] Boston Univ, Dept Phys, Boston, MA 02215 USA.
[Goldhaber, M.] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[Vagins, M. R.; Bays, K.; Casper, D.; Cravens, J. P.; Kropp, W. R.; Mine, S.; Regis, C.; Smy, M. B.; Sobel, H. W.] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
[Ganezer, K. S.; Hill, J.; Keig, W. E.] Calif State Univ Dominguez Hills, Dept Phys, Carson, CA 90747 USA.
[Jang, J. S.; Kim, J. Y.; Lim, I. T.] Chonnam Natl Univ, Dept Phys, Kwangju 500757, South Korea.
[Tasaka, S.] Gifu Univ, Dept Phys, Gifu 5011193, Japan.
[Watanabe, Y.] Kanagawa Univ, Dept Engn, Div Phys, Kanagawa Ku, Yokohama, Kanagawa 2218686, Japan.
[Hasegawa, T.; Ishida, T.; Ishii, T.; Kobayashi, T.; Nakadaira, T.; Nakamura, K.; Nishikawa, K.; Nishino, H.; Oyama, Y.; Sakashita, K.; Sekiguchi, T.; Tsukamoto, T.] High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan.
[Suzuki, A. T.] Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan.
[Minamino, A.; Nakaya, T.] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan.
[Fukuda, Y.] Miyagi Univ Educ, Dept Phys, Sendai, Miyagi 9800845, Japan.
[Itow, Y.; Mitsuka, G.; Tanaka, T.] Nagoya Univ, Solar Terr Environm Lab, Aichi 4648602, Japan.
[Jung, C. K.; Lopez, G.; McGrew, C.; Yanagisawa, C.] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
[Tamura, N.] Niigata Univ, Dept Phys, Niigata 9502181, Japan.
[Ishino, H.; Kibayashi, A.; Mino, S.; Mori, T.; Sakuda, M.; Toyota, H.] Okayama Univ, Dept Phys, Okayama 7008530, Japan.
[Kuno, Y.; Yoshida, M.] Osaka Univ, Dept Phys, Osaka 5600043, Japan.
[Kim, S. B.; Yang, B. S.] Seoul Natl Univ, Dept Phys, Seoul 151742, South Korea.
[Ishizuka, T.] Shizuoka Univ, Dept Syst Engn, Shizuoka 4328561, Japan.
[Okazawa, H.] Shizuoka Univ Welf, Dept Informat Social Welf, Shizuoka 4258611, Japan.
[Choi, Y.] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea.
[Nishijima, K.; Yokosawa, Y.] Tokai Univ, Dept Phys, Kanagawa 2591292, Japan.
[Koshiba, M.; Yokoyama, M.; Totsuka, Y.] Univ Tokyo, Bunkyo Ku, Tokyo 1130033, Japan.
[Chen, S.; Heng, Y.; Yang, Z.; Zhang, H.] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China.
[Connolly, K.; Dziomba, M.; Thrane, E.; Wilkes, R. J.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
[Kielczewska, D.; Mijakowski, P.] Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland.
[Learned, J. G.; Matsuno, S.] Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA.
RP Wendell, R (reprint author), Duke Univ, Dept Phys, Durham, NC 27708 USA.
RI Nakamura, Kenzo/F-7174-2010; Sobel, Henry/A-4369-2011; Obayashi,
Yoshihisa/A-4472-2011; Suzuki, Yoichiro/F-7542-2010; Wilkes,
R.Jeffrey/E-6011-2013; Yokoyama, Masashi/A-4458-2011; Takeuchi,
Yasuo/A-4310-2011; Kim, Soo-Bong/B-7061-2014; Ishino,
Hirokazu/C-1994-2015; Koshio, Yusuke/C-2847-2015; Kibayashi,
Atsuko/K-7327-2015;
OI Yokoyama, Masashi/0000-0003-2742-0251; Ishino,
Hirokazu/0000-0002-8623-4080; Koshio, Yusuke/0000-0003-0437-8505; Raaf,
Jennifer/0000-0002-4533-929X
FU Japanese Ministry of Education, Culture, Sports, Science and Technology;
United States Department of Energy; U.S. National Science Foundation;
Korean Research Foundation; Korea Science and Engineering Foundation;
State Committee for Scientific Research in Poland [1757/B/H03/2008/35]
FX We gratefully acknowledge the cooperation of the Kamioka Mining and
Smelting Company. The Super-Kamiokande experiment has been built and
operated from funding by the Japanese Ministry of Education, Culture,
Sports, Science and Technology, the United States Department of Energy,
and the U.S. National Science Foundation. Some of us have been supported
by funds from the Korean Research Foundation (BK21), and the Korea
Science and Engineering Foundation. Some of us have been supported by
the State Committee for Scientific Research in Poland (Grant No.
1757/B/H03/2008/35).
NR 47
TC 177
Z9 177
U1 0
U2 13
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY 1
PY 2010
VL 81
IS 9
AR 092004
DI 10.1103/PhysRevD.81.092004
PG 16
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 602NC
UT WOS:000278145100008
ER
PT J
AU Mihaila, B
Cardenas, A
Cooper, F
Saxena, A
AF Mihaila, Bogdan
Cardenas, Andres
Cooper, Fred
Saxena, Avadh
TI Stability and dynamical properties of Rosenau-Hyman compactons using
Pade approximants
SO PHYSICAL REVIEW E
LA English
DT Article
ID DISPERSIVE EQUATIONS; SOLITON-SOLUTIONS; GALERKIN METHODS; MAGMA
DYNAMICS; WAVES; PATTERNS; KINKS; LINES
AB We present a systematic approach for calculating higher-order derivatives of smooth functions on a uniform grid using Pade approximants. We illustrate our findings by deriving higher-order approximations using traditional second-order finite-difference formulas as our starting point. We employ these schemes to study the stability and dynamical properties of K (2,2) Rosenau-Hyman compactons including the collision of two compactons and resultant shock formation. Our approach uses a differencing scheme involving only nearest and next-to-nearest neighbors on a uniform spatial grid. The partial differential equation for the compactons involves first, second, and third partial derivatives in the spatial coordinate and we concentrate on four different fourth-order methods which differ in the possibility of increasing the degree of accuracy (or not) of one of the spatial derivatives to sixth order. A method designed to reduce round-off errors was found to be the most accurate approximation in stability studies of single solitary waves even though all derivates are accurate only to fourth order. Simulating compacton scattering requires the addition of fourth derivatives related to artificial viscosity. For those problems the different choices lead to different amounts of "spurious" radiation and we compare the virtues of the different choices.
C1 [Mihaila, Bogdan; Cardenas, Andres] Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA.
[Cardenas, Andres] NYU, Dept Phys, New York, NY 10003 USA.
[Cardenas, Andres] Cal Poly Pomona, Dept Math, Pomona, CA 91768 USA.
[Cooper, Fred] Santa Fe Inst, Santa Fe, NM 87501 USA.
[Cooper, Fred; Saxena, Avadh] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Cooper, Fred; Saxena, Avadh] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Mihaila, B (reprint author), Los Alamos Natl Lab, Mat Sci & Technol Div, POB 1663, Los Alamos, NM 87545 USA.
EM bmihaila@lanl.gov; andres.cardenas@nyu.edu; cooper@santafe.edu;
avadh@lanl.gov
RI Mihaila, Bogdan/D-8795-2013
OI Mihaila, Bogdan/0000-0002-1489-8814
FU (U.S.) Department of Energy
FX This work was performed in part under the auspices of the (U.S.)
Department of Energy. The authors gratefully acknowledge useful
conversations with C. Mihaila, F. Rus, and F. R. Villatoro. B. M. and F.
C. would like to thank the Santa Fe Institute for its hospitality during
the completion of this work.
NR 40
TC 13
Z9 13
U1 1
U2 7
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
J9 PHYS REV E
JI Phys. Rev. E
PD MAY
PY 2010
VL 81
IS 5
AR 056708
DI 10.1103/PhysRevE.81.056708
PN 2
PG 13
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 602OK
UT WOS:000278148500071
PM 20866355
ER
PT J
AU Schroeder, CB
Esarey, E
AF Schroeder, C. B.
Esarey, E.
TI Relativistic warm plasma theory of nonlinear laser-driven electron
plasma waves
SO PHYSICAL REVIEW E
LA English
DT Article
ID WAKE-FIELD ACCELERATOR; BEAMS; OSCILLATIONS; BREAKING; FLUID; AMPLITUDE;
EQUATIONS
AB A relativistic, warm fluid model of a nonequilibrium, collisionless plasma is developed and applied to examine nonlinear Langmuir waves excited by relativistically intense, short-pulse lasers. Closure of the covariant fluid theory is obtained via an asymptotic expansion assuming a nonrelativistic plasma temperature. The momentum spread is calculated in the presence of an intense laser field and shown to be intrinsically anisotropic. Coupling between the transverse and longitudinal momentum variances is enabled by the laser field. A generalized dispersion relation is derived for Langmuir waves in a thermal plasma in the presence of an intense laser field. Including thermal fluctuations in three-velocity-space dimensions, the properties of the nonlinear electron plasma wave, such as the plasma temperature evolution and nonlinear wavelength, are examined and the maximum amplitude of the nonlinear oscillation is derived. The presence of a relativistically intense laser pulse is shown to strongly influence the maximum plasma wave amplitude for nonrelativistic phase velocities owing to the coupling between the longitudinal and transverse momentum variances.
C1 [Schroeder, C. B.; Esarey, E.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Schroeder, CB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
OI Schroeder, Carl/0000-0002-9610-0166
FU Director, Office of Science, Office of High Energy Physics, of the U.S.
Department of Energy [DE-AC02-05CH11231]
FX We would like to thank B. A. Shadwick for many valuable and insightful
discussions on the topic of relativistic kinetic theories. This work was
supported by the Director, Office of Science, Office of High Energy
Physics, of the U.S. Department of Energy under Contract No.
DE-AC02-05CH11231.
NR 34
TC 8
Z9 8
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
J9 PHYS REV E
JI Phys. Rev. E
PD MAY
PY 2010
VL 81
IS 5
AR 056403
DI 10.1103/PhysRevE.81.056403
PN 2
PG 14
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 602OK
UT WOS:000278148500056
PM 20866340
ER
PT J
AU Cardona, JF
Peggs, SG
AF Cardona, Javier F.
Peggs, Stephen G.
TI Linear and nonlinear magnetic error measurements using action and phase
jump analysis (vol 12, 014002, 2009)
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Correction
C1 [Cardona, Javier F.] Univ Nacl Colombia, Bogota, Colombia.
[Peggs, Stephen G.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Cardona, JF (reprint author), Univ Nacl Colombia, Ciudad Univ, Bogota, Colombia.
EM jfcardona@unal.edu.co
NR 1
TC 0
Z9 0
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAY
PY 2010
VL 13
IS 5
AR 059901
DI 10.1103/PhysRevSTAB.13.059901
PG 1
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 602PK
UT WOS:000278151100009
ER
PT J
AU Fox, J
Mastorides, T
Rivetta, C
Van Winkle, D
Teytelman, D
AF Fox, J.
Mastorides, T.
Rivetta, C.
Van Winkle, D.
Teytelman, D.
TI Lessons learned from positron-electron project low level rf and
longitudinal feedback
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID DA-PHI-NE; CAVITY; KICKER; SYSTEM
AB The Positron-Electron Project II (PEP-II) B Factory collider ended the final phase of operation at nearly twice the design current and 4X the design luminosity. In the ultimate operation state, eight 1.2MW radio-frequency (rf) klystrons and 12 accelerating cavities were added beyond the original implementation, and the two storage rings were operating with longitudinal instability growth rates roughly 5X in excess of the original design estimates. From initial commissioning there has been continual adaptation of the low level rf (LLRF) control strategies, configuration tools, and some new hardware in response to unanticipated technical challenges. This paper offers a perspective on the original LLRF and longitudinal instability control design, and highlights via two examples the system evolution from the original design estimates through to the final machine with 1: 2 X 10(34) luminosity. The impact of unanticipated signals in the coupled-bunch longitudinal feedback and the significance of nonlinear processing elements in the LLRF systems are presented. We present valuable "lessons learned'' which are of interest to designers of next generation feedback and impedance controlled LLRF systems.
C1 [Fox, J.; Mastorides, T.; Rivetta, C.; Van Winkle, D.] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
[Teytelman, D.] Dimtel Inc, San Jose, CA USA.
RP Fox, J (reprint author), Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
FU SLAC accelerator department; Klystron department; Accelerator operations
groups
FX Skilled and motivated people were the most important factor for the
success of the PEP-II LLRF and LFB. Space limits our ability to name
individually all of the skilled and essential contributors. We
especially thank our collaborators at SLAC, LNF-INFN, KEK, and LBL who
contributed so much to the feedback program, and our colleagues and
collaborators at CERN who were central in the LLRF programs of the past
and future. We thank the SLAC accelerator department, Klystron
department, and Accelerator operations groups for support of the PEP-II
measurement and experimental efforts, and credit the SLAC ARD department
for the consistent encouragement to develop new techniques in these
areas.
NR 39
TC 1
Z9 1
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAY
PY 2010
VL 13
IS 5
AR 052802
DI 10.1103/PhysRevSTAB.13.052802
PG 16
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 602PK
UT WOS:000278151100007
ER
PT J
AU Gorlov, T
Danilov, V
Shishlo, A
AF Gorlov, T.
Danilov, V.
Shishlo, A.
TI Laser-assisted H- charge exchange injection in magnetic fields
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID EQUATIONS
AB The use of stripping foils for charge exchange injection can cause a number of operational problems in high intensity hadron accelerators. A recently proposed three-step method of laser-assisted injection is capable of overcoming these problems. This paper presents advances in the physical model of laser-assisted charge exchange injection of H- beams and covers a wide field of atomic physics. The model allows the calculation of the evolution of an H-0 beam taking into account spontaneous emission, field ionization, and external electromagnetic fields. Some new data on the hydrogen atom related to the problem are calculated. The numerical calculations in the model use realistic descriptions of laser field and injection beam. Generally, the model can be used for design and optimization of a laser-assisted injection cell within an accelerator lattice. Example calculations of laser-assisted injection for an intermediate experiment at SNS in Oak Ridge and for the PS2 accelerator at CERN are presented. Two different schemes, distinctively characterized by various magnetic fields at the excitation point, are discussed. It was shown that the emittance growth of an injected beam can be drastically decreased by moving the excitation point into a strong magnetic field.
C1 [Gorlov, T.; Danilov, V.; Shishlo, A.] Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37830 USA.
RP Gorlov, T (reprint author), Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37830 USA.
FU SNS through UT-Battelle, LLC [DE-AC05-00OR22725]
FX This work was supported by SNS through UT-Battelle, LLC, under Contract
No. DE-AC05-00OR22725 for the U.S. Department of Energy. The authors
also thank L. P. Pitaevskii, D. B. Uskov, and J. A. Holmes for useful
discussions.
NR 19
TC 2
Z9 2
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAY
PY 2010
VL 13
IS 5
AR 050101
DI 10.1103/PhysRevSTAB.13.050101
PG 9
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 602PK
UT WOS:000278151100001
ER
PT J
AU Litvinenko, VN
AF Litvinenko, Vladimir N.
TI Canceling evanescent waves in high-energy superconducting rf linacs
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB Many future projects plan using high-current, high-energy, multipass energy-recovery linacs that are based on superconducting rf (SRF) cavities. The necessity of ensuring the transverse stability of the beam in such accelerators imposes strict limits on the high order modes (HOMs) impedances, and demands effective HOM damping. The latter requirement often precludes achieving a high real-estate accelerating gradient in such structures. The modular structure of long SRF linacs also requires incorporating vacuum flanges; however, these flanges have surface contacts and cannot tolerate strong rf fields. Locating them in the low-field areas of the linac structure may involve considerably elongating the intermodular interfaces, a change that would reduce the linac's real-estate accelerating gradient. In this paper, I propose a novel method to resolve this issue, using compact interconnects between the SRF cavities wherein to locate effective HOM dampers and vacuum flanges.
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Litvinenko, VN (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
FU Brookhaven Science Associates, LLC, with the U.S. Department of Energy
[DE-AC02-98CH10886]
FX I am grateful to Ilan Ben-Zvi and Harald Hahn (BNL) for thoughtful,
in-depth discussion of the concepts presented in this paper as well as
for conveying the critiques and concerns of experts in the SRF
community. I especially acknowledge Ilan Ben-Zvi for bringing to my
attention the importance of reducing FM fields in the location of vacuum
flanges in SRF linacs. I also would like to thank Rama Calaga (BNL/CERN)
and Jacek Sekutowicz (DESY) for their constructive criticism of the
ideas presented here. This work is supported by Brookhaven Science
Associates, LLC, under Contract No. DE-AC02-98CH10886 with the U.S.
Department of Energy.
NR 37
TC 1
Z9 1
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAY
PY 2010
VL 13
IS 5
AR 051001
DI 10.1103/PhysRevSTAB.13.051001
PG 8
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 602PK
UT WOS:000278151100003
ER
PT J
AU Muggli, P
Allen, B
Yakimenko, VE
Park, J
Babzien, M
Kusche, KP
Kimura, WD
AF Muggli, P.
Allen, B.
Yakimenko, V. E.
Park, J.
Babzien, M.
Kusche, K. P.
Kimura, W. D.
TI Simple method for generating adjustable trains of picosecond electron
bunches
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID BEAM
AB A simple, passive method for producing an adjustable train of picosecond electron bunches is demonstrated. The key component of this method is an electron beam mask consisting of an array of parallel wires that selectively spoils the beam emittance. This mask is positioned in a high magnetic dispersion, low beta-function region of the beam line. The incoming electron beam striking the mask has a time/energy correlation that corresponds to a time/position correlation at the mask location. The mask pattern is transformed into a time pattern or train of bunches when the dispersion is brought back to zero downstream of the mask. Results are presented of a proof-of-principle experiment demonstrating this novel technique that was performed at the Brookhaven National Laboratory Accelerator Test Facility. This technique allows for easy tailoring of the bunch train for a particular application, including varying the bunch width and spacing, and enabling the generation of a trailing witness bunch.
C1 [Muggli, P.; Allen, B.] Univ So Calif, Los Angeles, CA 90089 USA.
[Yakimenko, V. E.; Park, J.; Babzien, M.; Kusche, K. P.] Brookhaven Natl Lab, Long Isl City, NY 11973 USA.
[Kimura, W. D.] STI Optron Inc, Bellevue, WA 98004 USA.
RP Muggli, P (reprint author), Univ So Calif, Los Angeles, CA 90089 USA.
EM muggli@usc.edu
FU U.S. Department of Energy [DE-FG02-04ER41294, DE-AC02-98CH10886,
DE-FG03-92ER40695, DE-FG02-92ER40745]
FX This work was supported by the U.S. Department of Energy, Grants No.
DE-FG02-04ER41294, No. DE-AC02-98CH10886, No. DE-FG03-92ER40695, and No.
DE-FG02-92ER40745. The contribution of the ATF technical staff to this
work is greatly appreciated.
NR 33
TC 24
Z9 24
U1 1
U2 7
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAY
PY 2010
VL 13
IS 5
AR 052803
DI 10.1103/PhysRevSTAB.13.052803
PG 10
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 602PK
UT WOS:000278151100008
ER
PT J
AU Naik, D
Ben-Zvi, I
AF Naik, Damayanti
Ben-Zvi, Ilan
TI Suppressing multipacting in a 56 MHz quarter wave resonator
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID BREAKDOWN; NIOBIUM
AB We propose using a beam excited 56 MHz radio frequency (rf) niobium quarter wave resonator (QWR) to enhance the luminosity and bunching of the RHIC's (relativistic heavy ion collider's) beam. From experience with similar structures, multipacting is expected but is to be avoided in a storage ring; therefore, we undertook extensive simulations with the MULTIPAC 2.1 2D code. They revealed that multipacting occurs in various bands up to a peak surface electric field of 50 kV/m, and is concentrated mostly above the beam gap and on the outer conductor. To resolve this issue, we introduced a ripple structure into the outer conductor and successfully eliminated multipacting.
C1 [Naik, Damayanti; Ben-Zvi, Ilan] Brookhaven Natl Lab, Collider Accelerator Dept, Upton, NY 11973 USA.
RP Naik, D (reprint author), Brookhaven Natl Lab, Collider Accelerator Dept, Upton, NY 11973 USA.
FU U.S. Department of Energy
FX We thank Anna Marie Porcellato for sharing her experience with
multipacting while operating the 80 MHz quarter wave resonator at LNL,
Italy. We appreciate the guidance of Lixin Ge, Lie-Quan Lee, Greg
Schussman, Cho-Kuen Ng, Zenghai Li, and Kwok Ko of SLAC Advanced
Computation Department in carrying out our simulations with 3D
electromagnetic parallel code. This work has been supported by the U.S.
Department of Energy.
NR 10
TC 1
Z9 1
U1 1
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAY
PY 2010
VL 13
IS 5
AR 052001
DI 10.1103/PhysRevSTAB.13.052001
PG 9
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 602PK
UT WOS:000278151100004
ER
PT J
AU Cortis, A
Berryman, JG
AF Cortis, Andrea
Berryman, James G.
TI Frequency-dependent viscous flow in channels with fractal rough surfaces
SO PHYSICS OF FLUIDS
LA English
DT Article
DE boundary layers; channel flow; flow simulation; flow through porous
media; fluid oscillations; fractals; permeability
ID SATURATED POROUS-MEDIA; DYNAMIC PERMEABILITY; PORE ROUGHNESS; ELASTIC
WAVES; SLOW-WAVE; FLUID; PROPAGATION; SANDSTONE; EQUATIONS; RANGE
AB The viscous dynamic permeability of some fractal-like channels is studied. For our particular class of geometries, the ratio of the pore surface area-to-volume tends to infinity (but has a finite cutoff), and the universal scaling of the dynamic permeability, k(omega), needs modification. We performed accurate numerical computations of k(omega) for channels characterized by deterministic fractal wall surfaces, for a broad range of fractal dimensions. The pertinent scaling model for k(omega) introduces explicitly the fractal dimension of the wall surface for a range of frequencies across the transition between viscous and inertia dominated regimes. The new model provides excellent agreement with our numerical simulations. (C) 2010 American Institute of Physics. [doi:10.1063/1.3407659]
C1 [Cortis, Andrea; Berryman, James G.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Cortis, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
EM acortis@lbl.gov
FU U.S. Department of Energy [DE-AC02-05CH11231]; Office of Basic Energy
Sciences, Division of Chemical Sciences, Geosciences, and Biosciences
FX Work of both A. C. and J.G.B. was performed under the auspices of the
U.S. Department of Energy, at the Lawrence Berkeley National Laboratory
under Contract No. DE-AC02-05CH11231. Support was provided specifically
by the Office of Basic Energy Sciences, Division of Chemical Sciences,
Geosciences, and Biosciences.
NR 41
TC 8
Z9 8
U1 0
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-6631
EI 1089-7666
J9 PHYS FLUIDS
JI Phys. Fluids
PD MAY
PY 2010
VL 22
IS 5
AR 053603
DI 10.1063/1.3407659
PG 11
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 603BN
UT WOS:000278183000024
ER
PT J
AU Schofield, SP
Restrepo, JM
AF Schofield, Samuel P.
Restrepo, Juan M.
TI Stability of planar buoyant jets in stratified fluids
SO PHYSICS OF FLUIDS
LA English
DT Article
DE diffusion; flow instability; flow simulation; jets; kinematics; nozzles;
numerical analysis; stratified flow; water
ID LAMINAR; FLOWS; ENVIRONMENT; PLUMES; MICROORGANISMS; INSTABILITIES;
AMBIENTS
AB We consider the flow structure and stability of a planar saline jet descending into a stable, density-stratified fluid. The jet exhibits a rapid acceleration on release, then deceleration, as it encounters the more dense surrounding fluid, yet retains its slender shape due to the low salt diffusion. As the jet descends it entrains fresher water which as it encounters the increasingly dense ambient fluid returns toward the nozzle forming a recirculation zone. Our numerical simulations agree qualitatively with previous experiments and thus serve as a tool to explain the basic kinematics of the jet. We also use numerical means to capture the three instability modes: an antisymmetric instability in the jet core, a symmetric instability in the jet core, and a symmetric instability in the entrained conduit of less saline water. For the dominant antisymmetric instability we determine the range of parameters that demarcate stable and unstable regions. (C) 2010 American Institute of Physics. [doi:10.1063/1.3415493]
C1 [Schofield, Samuel P.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Restrepo, Juan M.] Univ Arizona, Dept Math, Tucson, AZ 85721 USA.
[Restrepo, Juan M.] Univ Arizona, Program Appl Math, Tucson, AZ 85721 USA.
RP Schofield, SP (reprint author), Los Alamos Natl Lab, MS B284, Los Alamos, NM 87545 USA.
EM sams@lanl.gov; restrepo@physics.arizona.edu
OI Restrepo, Juan/0000-0003-2609-2882
FU Department of Energy [DE-FG02-03ER25577]; National Science Foundation
[DMS0335360]
FX S.S. was supported by a Department of Energy Computational Science
Graduate Fellowship. J.R. was supported by the National Science
Foundation through the Grant No. DMS0335360, as well as a Department of
Energy grant (Grant No. DE-FG02-03ER25577). J.R. thanks the Institute
for Mathematics and its Applications, where some of this work was done.
We thank R. Goldstein for his interest in our work and providing us with
experimental details on the Hele-Shaw experiment and the referees for
suggesting ways of improving the paper.
NR 32
TC 2
Z9 2
U1 2
U2 14
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-6631
J9 PHYS FLUIDS
JI Phys. Fluids
PD MAY
PY 2010
VL 22
IS 5
AR 053602
DI 10.1063/1.3415493
PG 12
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 603BN
UT WOS:000278183000023
ER
PT J
AU Ampleford, DJ
Jennings, CA
Hall, GN
Lebedev, SV
Bland, SN
Bott, SC
Suzuki-Vidal, F
Palmer, JBA
Chittenden, JP
Cuneo, ME
Frank, A
Blackman, EG
Ciardi, A
AF Ampleford, D. J.
Jennings, C. A.
Hall, G. N.
Lebedev, S. V.
Bland, S. N.
Bott, S. C.
Suzuki-Vidal, F.
Palmer, J. B. A.
Chittenden, J. P.
Cuneo, M. E.
Frank, A.
Blackman, E. G.
Ciardi, A.
TI Bow shocks in ablated plasma streams for nested wire array z-pinches: A
laboratory astrophysics testbed for radiatively cooled shocks
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 51st Annual Meeting of the Division-of-Plasma-Physics of the
American-Physics-Society
CY NOV 02-06, 2009
CL Atlanta, GA
SP Amer Phys Soc, Div Plasma Phys
DE astrophysical plasma; exploding wires; laboratory techniques;
magnetosphere; shock waves; Z pinch
ID SIMULATIONS; DYNAMICS; MODES; JETS
AB Astrophysical observations have demonstrated many examples of bow shocks, for example, the head of protostellar jets or supernova remnants passing through the interstellar medium or between discrete clumps in jets. For such systems where supersonic and super-Alfveacutenic flows and radiative cooling are all important, carefully scaled laboratory experiments can add insight into the physical processes involved. The early stage of a wire array z-pinch implosion consists of the steady ablation of material from fine metallic wires. Ablated material is accelerated toward the array axis by the JxB force. This flow is highly supersonic (M>5) and becomes super-Alfveacutenic (M(A)>2). Radiative cooling is significant in this flow and can be controlled by varying the material in the ablated plasma. The introduction of wires as obstructions in this steady flow leads to the formation of bow shocks, which can be used as a laboratory testbed for astrophysical bow shocks. The magnetic field associated with this obstruction wire can be controlled by varying the current through it. Differences in the shock for different cooling rates and different magnetic fields associated with the obstruction will be discussed, along with comparisons of dimensionless parameters in the experiments to astrophysical systems. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3335497]
C1 [Ampleford, D. J.; Jennings, C. A.; Cuneo, M. E.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Hall, G. N.; Lebedev, S. V.; Bland, S. N.; Suzuki-Vidal, F.; Palmer, J. B. A.; Chittenden, J. P.] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England.
[Bott, S. C.] Univ Calif San Diego, Energy Res Ctr, La Jolla, CA 92093 USA.
[Frank, A.; Blackman, E. G.] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA.
[Frank, A.; Blackman, E. G.] Univ Rochester, Laser Energet Lab, Rochester, NY 14627 USA.
[Ciardi, A.] Univ Paris 06, LERMA, Observ Paris, F-92195 Meudon, France.
RP Ampleford, DJ (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM damplef@sandia.gov
RI Hall, Gareth/C-4179-2015
NR 23
TC 7
Z9 8
U1 5
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2010
VL 17
IS 5
AR 056315
DI 10.1063/1.3335497
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 603BM
UT WOS:000278182900128
ER
PT J
AU Antonsen, TM
Davidson, RC
AF Antonsen, Thomas M.
Davidson, Ronald C.
TI Foreword to Special Issue: Papers from the 51st Annual Meeting of the
APS Division of Plasma Physics, Atlanta, Georgia, 2009
SO PHYSICS OF PLASMAS
LA English
DT Editorial Material
C1 [Antonsen, Thomas M.] Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA.
[Davidson, Ronald C.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Antonsen, TM (reprint author), Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA.
RI Antonsen, Thomas/D-8791-2017
OI Antonsen, Thomas/0000-0002-2362-2430
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2010
VL 17
IS 5
AR 055301
DI 10.1063/1.3328215
PG 1
WC Physics, Fluids & Plasmas
SC Physics
GA 603BM
UT WOS:000278182900082
ER
PT J
AU Barnes, M
Abel, IG
Dorland, W
Gorler, T
Hammett, GW
Jenko, F
AF Barnes, M.
Abel, I. G.
Dorland, W.
Goerler, T.
Hammett, G. W.
Jenko, F.
TI Direct multiscale coupling of a transport code to gyrokinetic turbulence
codes
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 51st Annual Meeting of the Division-of-Plasma-Physics of the
American-Physics-Society
CY NOV 02-06, 2009
CL Atlanta, GA
SP Amer Phys Soc, Div Plasma Phys
DE plasma simulation; plasma transport processes; plasma turbulence
ID FINITE ASPECT RATIO; PLASMA-CONFINEMENT; LOCAL TRANSPORT; CHAPTER 2;
TOKAMAK; SIMULATIONS; EQUATIONS; MODEL; INSTABILITIES; DRIVEN
AB Direct coupling between a transport solver and local, nonlinear gyrokinetic calculations using the multiscale gyrokinetic code TRINITY [M. Barnes, "TRINITY: A unified treatment of turbulence, transport, and heating in magnetized plasmas," Ph.D. thesis, University of Maryland, 2008 (eprint arXiv:0901.2868)] is described. The coupling of the microscopic and macroscopic physics is done within the framework of multiscale gyrokinetic theory, of which we present the assumptions and key results. An assumption of scale separation in space and time allows for the simulation of turbulence in small regions of the space-time grid, which are embedded in a coarse grid on which the transport equations are implicitly evolved. This leads to a reduction in computational expense of several orders of magnitude, making first-principles simulations of the full fusion device volume over the confinement time feasible on current computing resources. Numerical results from TRINITY simulations are presented and compared with experimental data from JET [M. Keilhacker, Plasma Phys. Controlled Fusion 41, B1 (1999)] and ASDEX Upgrade [O. Gruber, Nucl. Fusion 47, S622 (2007)] plasmas. (C) 2010 American Institute of Physics. [doi:10.1063/1.3323082]
C1 [Barnes, M.; Abel, I. G.] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3NP, England.
[Barnes, M.; Abel, I. G.] Euratom CCFE Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.
[Dorland, W.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
[Goerler, T.; Jenko, F.] Max Planck Inst Plasma Phys, D-85748 Garching, Germany.
[Hammett, G. W.] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Barnes, M (reprint author), Univ Oxford, Rudolf Peierls Ctr Theoret Phys, 1 Keble Rd, Oxford OX1 3NP, England.
EM michael.barnes@physics.ox.ac.uk
RI Barnes, Michael/F-4934-2011; Hammett, Gregory/D-1365-2011; Dorland,
William/B-4403-2009;
OI Hammett, Gregory/0000-0003-1495-6647; Dorland,
William/0000-0003-2915-724X; Gorler, Tobias/0000-0002-0851-6699
NR 55
TC 31
Z9 31
U1 2
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2010
VL 17
IS 5
AR 056109
DI 10.1063/1.3323082
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 603BM
UT WOS:000278182900102
ER
PT J
AU Barrios, MA
Hicks, DG
Boehly, TR
Fratanduono, DE
Eggert, JH
Celliers, PM
Collins, GW
Meyerhofer, DD
AF Barrios, M. A.
Hicks, D. G.
Boehly, T. R.
Fratanduono, D. E.
Eggert, J. H.
Celliers, P. M.
Collins, G. W.
Meyerhofer, D. D.
TI High-precision measurements of the equation of state of hydrocarbons at
1-10 Mbar using laser-driven shock waves
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 51st Annual Meeting of the Division-of-Plasma-Physics of the
American-Physics-Society
CY NOV 02-06, 2009
CL Atlanta, GA
SP Amer Phys Soc, Div Plasma Phys
DE impedance matching; plasma diagnostics; plasma shock waves
ID NATIONAL IGNITION FACILITY; LIQUID DEUTERIUM; TARGETS; INTERFEROMETER;
POLYSTYRENE; POLYBUTENE; BENZENE; DESIGN; FLUID
AB The equation of state (EOS) of polystyrene and polypropylene were measured using laser-driven shock waves with pressures from 1 to 10 Mbar. Precision data resulting from the use of alpha-quartz as an impedance-matching (IM) standard tightly constrains the EOS of these hydrocarbons, even with the inclusion of systematic errors inherent to IM. The temperature at these high pressures was measured, which, combined with kinematic measurements, provide a complete shock EOS. Both hydrocarbons were observed to reach similar compressions and temperatures as a function of pressure. The materials were observed to transition from transparent insulators to reflecting conductors at pressures of 1 to 2 Mbar. (C) 2010 American Institute of Physics. [doi:10.1063/1.3358144]
C1 [Barrios, M. A.; Boehly, T. R.; Fratanduono, D. E.; Meyerhofer, D. D.] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA.
[Barrios, M. A.; Meyerhofer, D. D.] Univ Rochester, Dept Phys & Astron, Rochester, NY 14623 USA.
[Hicks, D. G.; Eggert, J. H.; Celliers, P. M.; Collins, G. W.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Barrios, MA (reprint author), Univ Rochester, Laser Energet Lab, 250 E River Rd, Rochester, NY 14623 USA.
RI Collins, Gilbert/G-1009-2011; Hicks, Damien/B-5042-2015
OI Hicks, Damien/0000-0001-8322-9983
NR 54
TC 50
Z9 50
U1 1
U2 13
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2010
VL 17
IS 5
AR 056307
DI 10.1063/1.3358144
PG 14
WC Physics, Fluids & Plasmas
SC Physics
GA 603BM
UT WOS:000278182900120
ER
PT J
AU Betti, R
Chang, PY
Spears, BK
Anderson, KS
Edwards, J
Fatenejad, M
Lindl, JD
McCrory, RL
Nora, R
Shvarts, D
AF Betti, R.
Chang, P. Y.
Spears, B. K.
Anderson, K. S.
Edwards, J.
Fatenejad, M.
Lindl, J. D.
McCrory, R. L.
Nora, R.
Shvarts, D.
TI Thermonuclear ignition in inertial confinement fusion and comparison
with magnetic confinement
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 51st Annual Meeting of the Division-of-Plasma-Physics of the
American-Physics-Society
CY NOV 02-06, 2009
CL Atlanta, GA
SP Amer Phys Soc, Div Plasma Phys
DE cryogenics; explosions; laser fusion; plasma pressure; plasma
temperature
ID RAYLEIGH-TAYLOR INSTABILITY; DECELERATION-PHASE; TARGETS; PERFORMANCE;
CAPSULES; ENERGY; OMEGA; JET
AB The physics of thermonuclear ignition in inertial confinement fusion (ICF) is presented in the familiar frame of a Lawson-type criterion. The product of the plasma pressure and confinement time P tau for ICF is cast in terms of measurable parameters and its value is estimated for cryogenic implosions. An overall ignition parameter chi including pressure, confinement time, and temperature is derived to complement the product P tau. A metric for performance assessment should include both chi and P tau. The ignition parameter and the product P tau are compared between inertial and magnetic-confinement fusion. It is found that cryogenic implosions on OMEGA [T. R. Boehly , Opt. Commun. 133, 495 (1997)] have achieved P tau similar to 1.5 atm s comparable to large tokamaks such as the Joint European Torus [P. H. Rebut and B. E. Keen, Fusion Technol. 11, 13 (1987)] where P tau similar to 1 atm s. Since OMEGA implosions are relatively cold (T similar to 2 keV), their overall ignition parameter chi similar to 0.02-0.03 is similar to 5x lower than in JET (chi similar to 0.13), where the average temperature is about 10 keV. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3380857]
C1 [Betti, R.; Chang, P. Y.; Anderson, K. S.; McCrory, R. L.; Nora, R.] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA.
[Betti, R.; Chang, P. Y.; Anderson, K. S.; Nora, R.] Univ Rochester, Fus Sci Ctr Extreme States Matter, Rochester, NY 14623 USA.
[Spears, B. K.; Edwards, J.; Lindl, J. D.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Fatenejad, M.] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA.
[Shvarts, D.] Negev & Ben Gurion Univ Negev, NRCN, IL-84015 Beer Sheva, Israel.
RP Betti, R (reprint author), Univ Rochester, Laser Energet Lab, 250 E River Rd, Rochester, NY 14623 USA.
RI Chang, Po-Yu/A-9004-2013; Chang, Po-Yu/L-5745-2016
NR 34
TC 55
Z9 55
U1 7
U2 34
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2010
VL 17
IS 5
AR 058102
DI 10.1063/1.3380857
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 603BM
UT WOS:000278182900146
ER
PT J
AU Birn, J
Borovsky, JE
Hesse, M
Schindler, K
AF Birn, J.
Borovsky, J. E.
Hesse, M.
Schindler, K.
TI Scaling of asymmetric reconnection in compressible plasmas
SO PHYSICS OF PLASMAS
LA English
DT Article
DE magnetic reconnection; plasma magnetohydrodynamics; plasma simulation
ID DAYSIDE MAGNETOPAUSE; CHALLENGE; MODELS
AB The scaling of the reconnection rate with external parameters is reconsidered for antiparallel reconnection in a single-fluid magnetohydrodynamic (MHD) model, allowing for compressibility as well as asymmetry between the plasmas and magnetic fields in the two inflow regions. The results show a modest dependence of the reconnection rate on the plasma beta (ratio of plasma to magnetic pressure) in the inflow regions and demonstrate the importance of the conversion of magnetic energy to enthalpy flux (that is, convected thermal energy) in the outflow regions. The conversion of incoming magnetic to outgoing thermal energy flux remains finite even in the limit of incompressibility, while the scaling of the reconnection rate obtained earlier [P. A. Cassak and M. A. Shay, Phys. Plasmas 14, 102114 (2007)] is recovered. The assumptions entering the scaling estimates are critically investigated on the basis of two-dimensional resistive MHD simulations, confirming and even strengthening the importance of the enthalpy flux in the outflow from the reconnection site. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3429676]
C1 [Birn, J.; Borovsky, J. E.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Hesse, M.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Schindler, K.] Ruhr Univ, D-44780 Bochum, Germany.
RP Birn, J (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM jbirn@lanl.gov
RI Hesse, Michael/D-2031-2012; NASA MMS, Science Team/J-5393-2013
OI NASA MMS, Science Team/0000-0002-9504-5214
FU U.S. Department of Energy; NASA
FX This work was performed under the auspices of the U.S. Department of
Energy, supported by NASA's Heliophysics Theory and SR&T Programs, and
through a grant from NASA's MMS/SMART program.
NR 26
TC 26
Z9 26
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2010
VL 17
IS 5
AR 052108
DI 10.1063/1.3429676
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 603BM
UT WOS:000278182900009
ER
PT J
AU Campanell, MD
Laird, JN
Provost, T
Vasquez, SW
Zweben, SJ
AF Campanell, M. D.
Laird, J. N.
Provost, T.
Vasquez, S. W.
Zweben, S. J.
TI Measurements of the motion of filaments in a plasma ball
SO PHYSICS OF PLASMAS
LA English
DT Article
DE filamentation instability; plasma diagnostics
ID DISCHARGE; PHYSICS
AB Measurements were made of the motion of the filamentary structures in a plasma ball using high-speed cameras and other optical detectors. These filaments traverse the ball radially at similar to 10(6) cm/s at the driving frequency of similar to 26 kHz and drift upward through the ball at similar to 1 cm/s. The number of filaments and their radial speed increase approximately linearly with the applied voltage above some threshold. A custom plasma ball was constructed to observe the effects of varying gas pressure, gas species, and electrode properties on the filament structures. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3406546]
C1 [Campanell, M. D.; Laird, J. N.; Provost, T.; Vasquez, S. W.; Zweben, S. J.] Princeton Plasma Phys Lab, Princeton, NJ 08540 USA.
RP Campanell, MD (reprint author), Princeton Plasma Phys Lab, Princeton, NJ 08540 USA.
FU DOE-PPPL [DE-AC02-09CH11466]; Science Undergraduate Laboratory
FX We thank R. Bell, T. Bennett, C. Bunting, M. Burin, C. Brunkhorst, C.
Czarnocki, P. Efthimion, I. Kaganovich, V. Kudhik, A. Post-Zwicker, and
Y. Raitses for many helpful contributions to this project. This work was
supported by DOE-PPPL Contract No. DE-AC02-09CH11466. The participation
of J.L. and S. V. was supported by the Science Undergraduate Laboratory
Internship program.
NR 13
TC 1
Z9 1
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2010
VL 17
IS 5
AR 053507
DI 10.1063/1.3406546
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 603BM
UT WOS:000278182900061
ER
PT J
AU Choi, M
Green, D
Heidbrink, WW
Harvey, R
Liu, D
Chan, VS
Berry, LA
Jaeger, F
Lao, LL
Pinsker, RI
Podesta, M
Smithe, DN
Park, JM
Bonoli, P
AF Choi, M.
Green, D.
Heidbrink, W. W.
Harvey, R.
Liu, D.
Chan, V. S.
Berry, L. A.
Jaeger, F.
Lao, L. L.
Pinsker, R. I.
Podesta, M.
Smithe, D. N.
Park, J. M.
Bonoli, P.
CA RF SciDAC SWIM Team
TI Iterated finite-orbit Monte Carlo simulations with full-wave fields for
modeling tokamak ion cyclotron resonance frequency wave heating
experiments
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 51st Annual Meeting of the Division-of-Plasma-Physics of the
American-Physics-Society
CY NOV 02-06, 2009
CL Atlanta, GA
SP Amer Phys Soc, Div Plasma Phys
DE Monte Carlo methods; plasma radiofrequency heating; plasma simulation;
plasma toroidal confinement; plasma transport processes; Tokamak devices
ID DIII-D TOKAMAK; PLASMAS; HARMONICS
AB The five-dimensional finite-orbit Monte Carlo code ORBIT-RF [M. Choi , Phys. Plasmas 12, 1 (2005)] is successfully coupled with the two-dimensional full-wave code all-orders spectral algorithm (AORSA) [E. F. Jaeger , Phys. Plasmas 13, 056101 (2006)] in a self-consistent way to achieve improved predictive modeling for ion cyclotron resonance frequency (ICRF) wave heating experiments in present fusion devices and future ITER [R. Aymar , Nucl. Fusion 41, 1301 (2001)]. The ORBIT-RF/AORSA simulations reproduce fast-ion spectra and spatial profiles qualitatively consistent with fast ion D-alpha [W. W. Heidbrink , Plasma Phys. Controlled Fusion 49, 1457 (2007)] spectroscopic data in both DIII-D [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] and National Spherical Torus Experiment [M. Ono , Nucl. Fusion 41, 1435 (2001)] high harmonic ICRF heating experiments. This work verifies that both finite-orbit width effect of fast-ion due to its drift motion along the torus and iterations between fast-ion distribution and wave fields are important in modeling ICRF heating experiments. (C) 2010 American Institute of Physics. [doi:10.1063/1.3314336]
C1 [Choi, M.; Chan, V. S.; Lao, L. L.; Pinsker, R. I.] Gen Atom Co, San Diego, CA 92186 USA.
[Green, D.; Berry, L. A.; Jaeger, F.; Park, J. M.] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA.
[Heidbrink, W. W.; Liu, D.; Podesta, M.] Univ Calif Irvine, Irvine, CA 92697 USA.
[Harvey, R.] CompX, Del Mar, CA 92014 USA.
[Smithe, D. N.] Tech X Corp, Boulder, CO 80303 USA.
[Bonoli, P.] MIT, Cambridge, MA 02139 USA.
RP Choi, M (reprint author), Gen Atom Co, POB 85608, San Diego, CA 92186 USA.
RI Liu, Deyong/Q-2797-2015
OI Liu, Deyong/0000-0001-9174-7078
NR 24
TC 12
Z9 12
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2010
VL 17
IS 5
AR 056102
DI 10.1063/1.3314336
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 603BM
UT WOS:000278182900095
ER
PT J
AU Clark, DS
Haan, SW
Hammel, BA
Salmonson, JD
Callahan, DA
Town, RPJ
AF Clark, Daniel S.
Haan, Steven W.
Hammel, Bruce A.
Salmonson, Jay D.
Callahan, Debra A.
Town, Richard P. J.
TI Plastic ablator ignition capsule design for the National Ignition
Facility
SO PHYSICS OF PLASMAS
LA English
DT Article
DE beryllium; fusion reactor design; fusion reactor ignition; fusion
reactor targets; laser ablation; plasma inertial confinement; plasma
simulation; Rayleigh-Taylor instability
ID TARGETS
AB The National Ignition Campaign, tasked with designing and fielding targets for fusion ignition experiments on the National Ignition Facility (NIF) [G. H. Miller, E. I. Moses, and C. R. Wuest, Nucl. Fusion 44, S228 (2004)], has carried forward three complementary target designs for the past several years: a beryllium ablator design, a plastic ablator design, and a high-density carbon or synthetic diamond design. This paper describes current simulations and design optimization to develop the plastic ablator capsule design as a candidate for the first ignition attempt on NIF. The trade-offs in capsule scale and laser energy that must be made to achieve a comparable ignition probability to that with beryllium are emphasized. Large numbers of one-dimensional simulations, meant to assess the statistical behavior of the target design, as well as two-dimensional simulations to assess the target's susceptibility to Rayleigh-Taylor growth are presented. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3403293]
C1 [Clark, Daniel S.; Haan, Steven W.; Hammel, Bruce A.; Salmonson, Jay D.; Callahan, Debra A.; Town, Richard P. J.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Clark, DS (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM clark90@llnl.gov
FU U.S. Department of Energy [DE-AC52-07NA27344]
FX This work was performed under the auspices of the U.S. Department of
Energy by Lawrence Livermore National Laboratory under Contract No.
DE-AC52-07NA27344.
NR 24
TC 56
Z9 57
U1 1
U2 14
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2010
VL 17
IS 5
AR 052703
DI 10.1063/1.3403293
PG 13
WC Physics, Fluids & Plasmas
SC Physics
GA 603BM
UT WOS:000278182900039
ER
PT J
AU DeBoo, JC
Holland, C
Rhodes, TL
Schmitz, L
Wang, G
White, AE
Austin, ME
Doyle, EJ
Hillesheim, J
Peebles, WA
Petty, CC
Yan, Z
Zeng, L
AF DeBoo, J. C.
Holland, C.
Rhodes, T. L.
Schmitz, L.
Wang, G.
White, A. E.
Austin, M. E.
Doyle, E. J.
Hillesheim, J.
Peebles, W. A.
Petty, C. C.
Yan, Z.
Zeng, L.
TI Probing plasma turbulence by modulating the electron temperature
gradient
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 51st Annual Meeting of the Division-of-Plasma-Physics of the
American-Physics-Society
CY NOV 02-06, 2009
CL Atlanta, GA
SP Amer Phys Soc, Div Plasma Phys
DE discharges (electric); plasma density; plasma fluctuations; plasma
radiofrequency heating; plasma simulation; plasma temperature; plasma
turbulence; thermal diffusivity; Tokamak devices
ID DIII-D TOKAMAK; PHYSICS BASIS
AB The local value of a/L(Te), a turbulence drive term, was modulated with electron cyclotron heating in L-mode discharges on DIII-D [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] and the density and electron temperature fluctuations in low, intermediate, and high-k regimes were measured and compared with nonlinear gyrokinetic turbulence simulations using the GYRO code [J. Candy and R. E. Waltz, J. Comput. Phys. 186, 545 (2003)]. The local drive term at rho similar to 0.6 was reduced by up to 50%, which produced comparable reductions in electron temperature fluctuations at low-k. At intermediate k, k(theta)similar to 4 cm(-1) and k(theta)rho(s)similar to 0.8, a very interesting and unexpected result was observed where density fluctuations increased by up to 10% when the local drive term was decreased by 50%. Initial comparisons of simulations from GYRO with the thermal diffusivity from power balance analysis and measured turbulence response are reported. Simulations for the case with the lowest drive term are challenging as they are near the marginal value of a/L(Te) for trapped electron mode activity. (C) 2010 American Institute of Physics. [doi:10.1063/1.3316298]
C1 [DeBoo, J. C.; Petty, C. C.] Gen Atom Co, San Diego, CA 92186 USA.
[Holland, C.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Rhodes, T. L.; Schmitz, L.; Wang, G.; Doyle, E. J.; Hillesheim, J.; Peebles, W. A.; Zeng, L.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
[White, A. E.] Oak Ridge Inst Sci & Educ, Oak Ridge, TN 37830 USA.
[Austin, M. E.] Univ Texas Austin, Austin, TX 78713 USA.
[Yan, Z.] Univ Wisconsin, Madison, WI 53706 USA.
RP DeBoo, JC (reprint author), Gen Atom Co, POB 85608, San Diego, CA 92186 USA.
RI Yan, Zheng/E-7005-2011; White, Anne/B-8990-2011
NR 20
TC 25
Z9 25
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2010
VL 17
IS 5
AR 056105
DI 10.1063/1.3316298
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 603BM
UT WOS:000278182900098
ER
PT J
AU Dimits, AM
AF Dimits, Andris M.
TI Gyrokinetic equations in an extended ordering
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 51st Annual Meeting of the Division-of-Plasma-Physics of the
American-Physics-Society
CY NOV 02-06, 2009
CL Atlanta, GA
SP Amer Phys Soc, Div Plasma Phys
DE plasma kinetic theory; plasma magnetohydrodynamics; plasma transport
processes
ID GRADIENT-DRIVEN TURBULENCE; GENERAL PLASMA EQUILIBRIA; PARTICLE
SIMULATION; TRANSPORT; STABILITY; TOKAMAKS
AB A gyrokinetic theory has been developed in an extended ordering in which the small parameter is the ratio of the ExB shearing rate to the gyrofrequency. This allows for long wavelength ExB flows of order of the thermal velocity, instead of the more restrictive standard orderings which either require that the electrostatic potential or the ExB flow velocity be small compared with the thermal levels. This theory generalizes prior work to allow for time dependence in the large long-wavelength component of the electric field and a continuum of scales in the field components rather than just two distinct components. In the new theory, a significant part of the polarization drift now resides in the equations of motion. However, there is still an identifiable polarization density that can be used to solve for the electrostatic potential from a quasineutrality or vorticity equation. The present derivation is carried out for the case of electrostatic perturbations and a slab equilibrium magnetic field, as this is sufficient and most clear for demonstrating the new results and issues associated specifically with the extended ordering. (C) 2010 American Institute of Physics. [doi:10.1063/1.3327211]
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Dimits, AM (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
NR 27
TC 13
Z9 13
U1 0
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2010
VL 17
IS 5
AR 055901
DI 10.1063/1.3327211
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 603BM
UT WOS:000278182900091
ER
PT J
AU Frenje, JA
Casey, DT
Li, CK
Seguin, FH
Petrasso, RD
Glebov, VY
Radha, PB
Sangster, TC
Meyerhofer, DD
Hatchett, SP
Haan, SW
Cerjan, CJ
Landen, OL
Fletcher, KA
Leeper, RJ
AF Frenje, J. A.
Casey, D. T.
Li, C. K.
Seguin, F. H.
Petrasso, R. D.
Glebov, V. Yu.
Radha, P. B.
Sangster, T. C.
Meyerhofer, D. D.
Hatchett, S. P.
Haan, S. W.
Cerjan, C. J.
Landen, O. L.
Fletcher, K. A.
Leeper, R. J.
TI Probing high areal-density cryogenic deuterium-tritium implosions using
downscattered neutron spectra measured by the magnetic recoil
spectrometer
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 51st Annual Meeting of the Division-of-Plasma-Physics of the
American-Physics-Society
CY NOV 02-06, 2009
CL Atlanta, GA
SP Amer Phys Soc, Div Plasma Phys
DE explosions; Monte Carlo methods; neutron spectra; neutron spectrometers;
plasma diagnostics; plasma inertial confinement; plasma simulation;
plasma temperature
ID NATIONAL-IGNITION-FACILITY; INERTIAL-CONFINEMENT-FUSION; LASER; OMEGA;
PLASMAS
AB For the first time high areal-density (rho R) cryogenic deuterium-tritium (DT) implosions have been probed using downscattered neutron spectra measured with the magnetic recoil spectrometer (MRS) [J. A. Frenje , Rev. Sci. Instrum. 79, 10E502 (2008)], recently installed and commissioned on OMEGA [T. R. Boehly , Opt. Commun. 133, 495 (1997)]. The rho R data obtained with the MRS have been essential for understanding how the fuel is assembled and for guiding the cryogenic program at the Laboratory for Laser Energetics (LLE) to rho R values up to similar to 300 mg/cm(2). The rho R data obtained from well-established charged particle spectrometry techniques [C. K. Li , Phys. Plasmas 8, 4902 (2001)] were used to authenticate the MRS data for low-rho R plastic capsule implosions, and the rho R values inferred from these techniques are in excellent agreement, indicating that the MRS technique provides high-fidelity data. Recent OMEGA-MRS data and Monte Carlo simulations have shown that the MRS on the NIF [G. H. Miller , Nucl. Fusion 44, S228 (2004)] will meet most of the absolute and relative requirements for determining rho R, ion temperature (T(i)) and neutron yield (Y(n)) in both low-yield, tritium-rich, deuterium-lean, hydrogen-doped implosions and high-yield DT implosions. (C) 2010 American Institute of Physics. [doi:10.1063/1.3304475]
C1 [Frenje, J. A.; Casey, D. T.; Li, C. K.; Seguin, F. H.; Petrasso, R. D.] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA.
[Glebov, V. Yu.; Radha, P. B.; Sangster, T. C.; Meyerhofer, D. D.] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA.
[Hatchett, S. P.; Haan, S. W.; Cerjan, C. J.; Landen, O. L.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Fletcher, K. A.] SUNY Coll Geneseo, Geneseo, NY 14454 USA.
[Leeper, R. J.] Sandia Natl Labs, Albuquerque, NM 87123 USA.
[Meyerhofer, D. D.] Univ Rochester, Dept Mech Engn & Phys & Astron, Rochester, NY 14627 USA.
RP Frenje, JA (reprint author), MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
NR 25
TC 62
Z9 63
U1 0
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2010
VL 17
IS 5
AR 056311
DI 10.1063/1.3304475
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 603BM
UT WOS:000278182900124
ER
PT J
AU Friedman, A
Barnard, JJ
Cohen, RH
Grote, DP
Lund, SM
Sharp, WM
Faltens, A
Henestroza, E
Jung, JY
Kwan, JW
Lee, EP
Leitner, MA
Logan, BG
Vay, JL
Waldron, WL
Davidson, RC
Dorf, M
Gilson, EP
Kaganovich, ID
AF Friedman, A.
Barnard, J. J.
Cohen, R. H.
Grote, D. P.
Lund, S. M.
Sharp, W. M.
Faltens, A.
Henestroza, E.
Jung, J. -Y.
Kwan, J. W.
Lee, E. P.
Leitner, M. A.
Logan, B. G.
Vay, J. -L.
Waldron, W. L.
Davidson, R. C.
Dorf, M.
Gilson, E. P.
Kaganovich, I. D.
TI Beam dynamics of the Neutralized Drift Compression Experiment-II, a
novel pulse-compressing ion accelerator
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 51st Annual Meeting of the Division-of-Plasma-Physics of the
American-Physics-Society
CY NOV 02-06, 2009
CL Atlanta, GA
SP Amer Phys Soc, Div Plasma Phys
DE ion beams; space charge
ID LINEAR ACCELERATORS; TRANSVERSE
AB Intense beams of heavy ions are well suited for heating matter to regimes of emerging interest. A new facility, NDCX-II, will enable studies of warm dense matter at similar to 1 eV and near-solid density, and of heavy-ion inertial fusion target physics relevant to electric power production. For these applications the beam must deposit its energy rapidly, before the target can expand significantly. To form such pulses, ion beams are temporally compressed in neutralizing plasma; current amplification factors of similar to 50-100 are routinely obtained on the Neutralized Drift Compression Experiment (NDCX) at the Lawrence Berkeley National Laboratory. In the NDCX-II physics design, an initial non-neutralized compression renders the pulse short enough that existing high-voltage pulsed power can be employed. This compression is first halted and then reversed by the beam's longitudinal space-charge field. Downstream induction cells provide acceleration and impose the head-to-tail velocity gradient that leads to the final neutralized compression onto the target. This paper describes the discrete-particle simulation models (one-, two-, and three-dimensional) employed and the space-charge-dominated beam dynamics being realized. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3292634]
C1 [Friedman, A.; Barnard, J. J.; Cohen, R. H.; Grote, D. P.; Lund, S. M.; Sharp, W. M.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Faltens, A.; Henestroza, E.; Jung, J. -Y.; Kwan, J. W.; Lee, E. P.; Leitner, M. A.; Logan, B. G.; Vay, J. -L.; Waldron, W. L.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Davidson, R. C.; Dorf, M.; Gilson, E. P.; Kaganovich, I. D.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Friedman, A (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM af@llnl.gov
NR 21
TC 31
Z9 31
U1 1
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2010
VL 17
IS 5
AR 056704
DI 10.1063/1.3292634
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 603BM
UT WOS:000278182900136
ER
PT J
AU Froula, DH
Divol, L
London, RA
Berger, RL
Doppner, T
Meezan, NB
Ralph, J
Ross, JS
Suter, LJ
Glenzer, SH
AF Froula, D. H.
Divol, L.
London, R. A.
Berger, R. L.
Doeppner, T.
Meezan, N. B.
Ralph, J.
Ross, J. S.
Suter, L. J.
Glenzer, S. H.
TI Experimental basis for laser-plasma interactions in ignition hohlraums
at the National Ignition Facility
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 51st Annual Meeting of the Division-of-Plasma-Physics of the
American-Physics-Society
CY NOV 02-06, 2009
CL Atlanta, GA
SP Amer Phys Soc, Div Plasma Phys
DE Brillouin spectra; plasma density; plasma inertial confinement; plasma
instability; plasma production by laser; plasma-beam interactions; Raman
spectra
ID STIMULATED BRILLOUIN-SCATTERING; RAMAN-SCATTERING; SCALE; TARGETS;
FUSION
AB A series of laser-plasma interaction experiments is presented using gas-filled hohlraums that shed light on the behavior of stimulated Raman scattering and stimulated Brillouin scattering at various plasma conditions encountered in indirect drive ignition designs. Detailed experimental results are presented that quantify the density, temperature, and intensity thresholds for both of these instabilities. In addition to controlling plasma parameters, the National Ignition Campaign relies on optical beam smoothing techniques to mitigate backscatter and the results presented show that polarization smoothing is effective at controlling backscatter. These results provide an experimental basis for the forthcoming experiments on National Ignition Facility. (C) 2010 American Institute of Physics. [doi:10.1063/1.3304474]
C1 [Froula, D. H.; Divol, L.; London, R. A.; Berger, R. L.; Doeppner, T.; Meezan, N. B.; Ralph, J.; Ross, J. S.; Suter, L. J.; Glenzer, S. H.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Froula, DH (reprint author), Lawrence Livermore Natl Lab, L-399,POB 808, Livermore, CA 94551 USA.
EM froula1@llnl.gov
NR 43
TC 22
Z9 26
U1 2
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2010
VL 17
IS 5
AR 056302
DI 10.1063/1.3304474
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 603BM
UT WOS:000278182900115
ER
PT J
AU Gilson, EP
Davidson, RC
Dorf, M
Efthimion, PC
Majeski, R
Chung, M
Gutierrez, MS
Kabcenell, AN
AF Gilson, Erik P.
Davidson, Ronald C.
Dorf, Mikhail
Efthimion, Philip C.
Majeski, Richard
Chung, Moses
Gutierrez, Michael S.
Kabcenell, Aaron N.
TI Studies of emittance growth and halo particle production in intense
charged particle beams using the Paul Trap Simulator Experiment
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 51st Annual Meeting of the Division-of-Plasma-Physics of the
American-Physics-Society
CY NOV 02-06, 2009
CL Atlanta, GA
SP Amer Phys Soc, Div Plasma Phys
DE particle beam bunching; particle beam dynamics; particle traps; plasma
diagnostics; plasma instability; plasma magnetohydrodynamics; plasma
transport processes; space charge; white noise
ID EXPERIMENT PTSX; PROPAGATION; INSTABILITY
AB The Paul Trap Simulator Experiment (PTSX) is a compact laboratory experiment that places the physicist in the frame-of-reference of a long, charged-particle bunch coasting through a kilometers-long magnetic alternating-gradient (AG) transport system. The transverse dynamics of particles in both systems are described by the same set of equations, including nonlinear space-charge effects. The time-dependent voltages applied to the PTSX quadrupole electrodes in the laboratory frame are equivalent to the spatially periodic magnetic fields applied in the AG system. The transverse emittance of the charge bunch, which is a measure of the area in the transverse phase space that the beam distribution occupies, is an important metric of beam quality. Maintaining low emittance is an important goal when defining AG system tolerances and when designing AG systems to perform beam manipulations such as transverse beam compression. Results are reviewed from experiments in which white noise and colored noise of various amplitudes and durations have been applied to the PTSX electrodes. This noise is observed to drive continuous emittance growth and increase in root-mean-square beam radius over hundreds of lattice periods. Additional results are reviewed from experiments that determine the conditions necessary to adiabatically reduce the charge bunch's transverse size and simultaneously maintain high beam quality. During adiabatic transitions, there is no change in the transverse emittance. The transverse compression can be achieved either by a gradual change in the PTSX voltage waveform amplitude or frequency. Results are presented from experiments in which low emittance is achieved by using focusing-off-defocusing-off waveforms. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3354109]
C1 [Gilson, Erik P.; Davidson, Ronald C.; Dorf, Mikhail; Efthimion, Philip C.; Majeski, Richard] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA.
[Chung, Moses] Fermilab Natl Accelerator Lab, Accelerator Phys Ctr, Batavia, IL 60510 USA.
[Gutierrez, Michael S.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
[Kabcenell, Aaron N.] Weston High Sch, Weston, CT 06883 USA.
RP Gilson, EP (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM egilson@pppl.gov
NR 36
TC 4
Z9 4
U1 1
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2010
VL 17
IS 5
AR 056707
DI 10.1063/1.3354109
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 603BM
UT WOS:000278182900139
ER
PT J
AU Gonsalves, AJ
Nakamura, K
Lin, C
Osterhoff, J
Shiraishi, S
Schroeder, CB
Geddes, CGR
Toth, C
Esarey, E
Leemans, WP
AF Gonsalves, A. J.
Nakamura, K.
Lin, C.
Osterhoff, J.
Shiraishi, S.
Schroeder, C. B.
Geddes, C. G. R.
Toth, Cs.
Esarey, E.
Leemans, W. P.
TI Plasma channel diagnostic based on laser centroid oscillations
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 51st Annual Meeting of the Division-of-Plasma-Physics of the
American-Physics-Society
CY NOV 02-06, 2009
CL Atlanta, GA
SP Amer Phys Soc, Div Plasma Phys
DE discharges (electric); plasma accelerators; plasma density; plasma
diagnostics
ID ELECTRON-ACCELERATORS; PULSES; SIMULATIONS; INSTABILITY; BEAMS
AB A technique has been developed for measuring the properties of discharge-based plasma channels by monitoring the centroid location of a laser beam exiting the channel as a function of input alignment offset between the laser and the channel. Experiments were performed using low-intensity (< 10(14) W cm(-2)) laser pulses focused onto the entrance of a hydrogen-filled capillary discharge waveguide. Scanning the laser centroid position at the input of the channel and recording the exit position allow determination of the channel depth with an accuracy of a few percent, measurement of the transverse channel shape, and inference of the matched spot size. In addition, accurate alignment of the laser beam through the plasma channel is provided by minimizing laser centroid motion at the channel exit as the channel depth is scanned either by scanning the plasma density or the discharge timing. The improvement in alignment accuracy provided by this technique will be crucial for minimizing electron beam pointing errors in laser plasma accelerators. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3357175]
C1 [Gonsalves, A. J.; Nakamura, K.; Lin, C.; Osterhoff, J.; Shiraishi, S.; Schroeder, C. B.; Geddes, C. G. R.; Toth, Cs.; Esarey, E.; Leemans, W. P.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Gonsalves, AJ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
OI Schroeder, Carl/0000-0002-9610-0166
NR 33
TC 16
Z9 16
U1 1
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2010
VL 17
IS 5
AR 056706
DI 10.1063/1.3357175
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 603BM
UT WOS:000278182900138
ER
EF