FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Puente, CE
Cortis, A
Sivakumar, B
AF Puente, Carlos E.
Cortis, Andrea
Sivakumar, Bellie
TI BELLS GALORE: OSCILLATIONS AND CIRCLE-MAP DYNAMICS FROM SPACE-FILLING
FRACTAL FUNCTIONS
SO FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY
LA English
DT Article
DE Space-Filling Fractal Functions; Gaussian Distribution; Kaleidoscope
Decompositions; Oscillations Among Bells
ID GAUSSIAN DISTRIBUTION
AB The construction of a host of interesting patterns over one and two dimensions, as transformations of multifractal measures via fractal interpolating functions related to simple a. ne mappings, is reviewed. It is illustrated that, while space-filling fractal functions most commonly yield limiting Gaussian distribution measures (bells), there are also situations (depending on the a. ne mappings' parameters) in which there is no limit. Specifically, the one-dimensional case may result in oscillations between two bells, whereas the two-dimensional case may give rise to unexpected circle map dynamics of an arbitrary number of two-dimensional circular bells. It is also shown that, despite the multitude of bells over two dimensions, whose means dance making regular polygons or stars inscribed on a circle, the iteration of a. ne maps yields exotic kaleidoscopes that decompose such an oscillatory pattern in a way that is similar to the many cases that converge to a single bell.
C1 [Puente, Carlos E.; Sivakumar, Bellie] Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 USA.
[Cortis, Andrea] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Puente, CE (reprint author), Univ Calif Davis, Dept Land Air & Water Resources, 127 Veihmeyer Hall, Davis, CA 95616 USA.
EM cepuente@ucdavis.edu
FU Director, Office of Science, of the US Department of Energy
[DE-AC02-05CH11231]
FX This work was supported in part by the Director, Office of Science, of
the US Department of Energy under Contract No. DE-AC02-05CH11231.
NR 16
TC 0
Z9 0
U1 1
U2 2
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0218-348X
J9 FRACTALS
JI Fractals-Complex Geom. Patterns Scaling Nat. Soc.
PD DEC
PY 2008
VL 16
IS 4
BP 367
EP 378
DI 10.1142/S0218348X08004083
PG 12
WC Mathematics, Interdisciplinary Applications; Multidisciplinary Sciences
SC Mathematics; Science & Technology - Other Topics
GA 379FK
UT WOS:000261381900008
ER
PT J
AU Han, Y
AF Han, Yong
TI A jellium model analysis on quantum growth of metal nanowires and
nanomesas
SO FRONTIERS OF PHYSICS IN CHINA
LA English
DT Article
DE jellium model; free electrons; quantum size effects; metal nanowires;
metal nanomesas
AB A simple jellium model is used to investigate the stability of a metal nanowire as a function of its size. The theoretical results from the model indicate the quantum selectivity of preferable radii of nanowires, in apparent agreement with the experimental observations. It is consequently suggested that a series of stable "magic numbers" and "instability gaps" observed in the synthesis experiments of Au nanowires is mainly attributed to the quantum-mechanical behavior. These stable radii can be achieved by rearranging atoms during the formation of nanowires. The model is also used to analyze the growth of Au nanomesas on a graphite surface, and the puzzling growth behavior of Au nanomesas can be reasonably explained.
C1 [Han, Yong] Univ Utah, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USA.
RP Han, Y (reprint author), US DOE, IPRT, 307D Wilhelm Hall, Ames, IA 50011 USA.
EM octavian2009@gmail.com
RI Han, Yong/F-5701-2012
OI Han, Yong/0000-0001-5404-0911
FU DOE
FX The author thanks Dr. Feng Liu, Dr. Cai-Zhuang Wang, and Dr. Elizabeth
Lupton for helpful discussions. This work was supported by DOE-BES
program. The calculations were performed on IBM SP RS/6000 at NERSC, and
AMD Opteron cluster at the CHPC, University of Utah.
NR 44
TC 4
Z9 4
U1 1
U2 1
PU HIGHER EDUCATION PRESS
PI BEIJING
PA SHATANHOU ST 55, BEIJING 100009, PEOPLES R CHINA
SN 1673-3487
J9 FRONT PHYS CHINA
JI Front. Phys. China
PD DEC
PY 2008
VL 3
IS 4
BP 436
EP 443
DI 10.1007/s11467-008-0037-8
PG 8
WC Physics, Multidisciplinary
SC Physics
GA V12XC
UT WOS:000207630900005
ER
PT J
AU Weber, AZ
Delacourt, C
AF Weber, A. Z.
Delacourt, C.
TI Mathematical Modelling of Cation Contamination in a Proton-exchange
Membrane
SO FUEL CELLS
LA English
DT Article
DE Contamination; Hydrogen Pump; Ion-exchange Membrane; Mathematical Model;
Multicomponent Diffusion Equations; Nafion; Stefan-Maxwell Equations
ID ELECTROLYTE FUEL-CELLS; HYDROGEN OXIDATION; WATER MANAGEMENT; IMPURITY
IONS; TRANSPORT; PERFORMANCES; SIDE
AB Transport phenomena in an ion-exchange membrane containing both H(+) and K(+) are described using multicomponent diffusion equations (Stefan-Maxwell). A model is developed for transport through a Nafion 112 membrane in a hydrogen-pump setup. The model results are analysed to quantify the impact of cation contamination on cell potential. It is shown that limiting current densities can result due to a decrease in proton concentration caused by the build-up of contaminant ions. An average cation concentration of 30 to 40% is required for appreciable effects to be noticed under typical steady-state operating conditions.
C1 [Weber, A. Z.; Delacourt, C.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Weber, AZ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM azweber@lbl.gov
OI Weber, Adam/0000-0002-7749-1624
FU Director, Office of Science, of the U.S. Department of Energy
[DE-AC02-05CH11231]
FX The authors would like to thank helpful discussions with Bryan Pivovar
and Brian Kienitz. This work was supported by the Director, Office of
Science, of the U.S. Department of Energy under Contract No.
DE-AC02-05CH11231.
NR 15
TC 22
Z9 22
U1 0
U2 13
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1615-6846
J9 FUEL CELLS
JI Fuel Cells
PD DEC
PY 2008
VL 8
IS 6
BP 459
EP 465
DI 10.1002/fuce.200800044
PG 7
WC Electrochemistry; Energy & Fuels
SC Electrochemistry; Energy & Fuels
GA 390PC
UT WOS:000262175200011
ER
PT J
AU Shannon, GN
Rozelle, PL
Pisupati, SV
Sridhar, S
AF Shannon, G. N.
Rozelle, P. L.
Pisupati, Sarma V.
Sridhar, S.
TI Conditions for entrainment into a FeOx containing slag for a
carbon-containing particle in an entrained coal gasifier
SO FUEL PROCESSING TECHNOLOGY
LA English
DT Article
DE FeOx; Slag; Gasification; Carbon
ID BLAST-FURNACE; SLAG/CARBON INTERFACE; TRANSFORMATIONS; GASIFICATION;
WETTABILITY; INJECTION; MINERALS; STEEL; MODEL
AB When incompletely gasified coal particles impact the slag layer in an entrained slagging gasifier, a situation will arise where the particles will either get engulfed by the slag or re-entrained into the circulating gas. This will be determined by a balance of forces acting on the particle which in turn is governed by the slag and particle properties, and pertinent gasifier conditions, namely temperature, and particle impact velocity. In this paper a model is introduced that takes into account, the drag-, capillary-, and added mass-forces and predicts the behavior of spherical particles of different sizes and slags of different FeOx contents. The model predicts that particles either get completely submerged, settle at an incompletely separated position, or oscillate at the interface. A sensitivity analysis was performed showing that for a particle of certain size and impact velocity, submersion is most strongly promoted by a low slag viscosity (largely influenced by FeOx content) and contact angle (determined by whether or not-reactive wetting and liquid Fe formation occurs). (C) 2008 Elsevier B.V. All rights reserved.
C1 [Pisupati, Sarma V.] Penn State Univ, Dept Energy & Mineral Engn, University Pk, PA 16802 USA.
[Pisupati, Sarma V.; Sridhar, S.] Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
[Shannon, G. N.; Sridhar, S.] Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA.
[Rozelle, P. L.] Off Clean Energy Syst, Dept Energy, Washington, DC 20585 USA.
RP Pisupati, SV (reprint author), Penn State Univ, Dept Energy & Mineral Engn, University Pk, PA 16802 USA.
EM spisupati@psu.edu
RI Pisupati, Sarma/A-9861-2009
OI Pisupati, Sarma/0000-0002-2098-3302
FU National Science Foundation [0348818]; National Energy Technology
Laboratory's on-going research in Gasification Technology
[DE-AC26-04NT41817]
FX Financial support from the National Science Foundation under the CAREER
grant DMR 0348818 is greatly acknowledged. This technical effort also
supported the National Energy Technology Laboratory's on-going research
in Gasification Technology under the RDS contract DE-AC26-04NT41817.
NR 21
TC 23
Z9 23
U1 2
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-3820
J9 FUEL PROCESS TECHNOL
JI Fuel Process. Technol.
PD DEC
PY 2008
VL 89
IS 12
BP 1379
EP 1385
DI 10.1016/j.fuproc.2008.06.010
PG 7
WC Chemistry, Applied; Energy & Fuels; Engineering, Chemical
SC Chemistry; Energy & Fuels; Engineering
GA 387AX
UT WOS:000261925200019
ER
PT J
AU Ioki, K
Barabash, V
Cordier, J
Enoeda, M
Federici, G
Kim, BC
Mazul, I
Merola, M
Morimoto, M
Nakahira, M
Pick, M
Rozov, V
Shimada, M
Suzuki, S
Ulrickson, M
Utin, Y
Wang, X
Wu, S
Yu, J
AF Ioki, K.
Barabash, V.
Cordier, J.
Enoeda, M.
Federici, G.
Kim, B. C.
Mazul, I.
Merola, M.
Morimoto, M.
Nakahira, M.
Pick, M.
Rozov, V.
Shimada, M.
Suzuki, S.
Ulrickson, M.
Utin, Yu.
Wang, X.
Wu, S.
Yu, J.
TI ITER vacuum vessel, in-vessel components and plasma facing materials
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Fusion Nuclear Technology
CY SEP 30-OCT 05, 2007
CL Heidelberg, GERMANY
SP Forschungszentrum Karlsruhe
DE Vacuum vessel; Blanket; First wall; Cryostat; Divertor
ID DESIGN
AB The Vacuum vessel (VV) design is being developed in more detail considering manufacturing and assembly methods, and cost. Incorporating manufacturing studies being performed in cooperation with ITER Parties, the regular VV sector design has been nearly Finalized. Design of the neutral beam (NB) ports including duct liners has been developed.
Design of the in-wall shielding has been developed in more detail considering the supporting structure and the assembly method. Additional ferromagnetic inserts to be installed in the outboard midplane region will minimize the maximum ripple and the toroidal field flux line fluctuation.
Detailed Studies were carried out on the ITER vacuum vessel to define appropriate codes and standards in the context of ITER licensing in France.
The blanket Module design has progressed in cooperation with participant teams. Fabrication of mock-ups for qualification testing is Under way and the tests will be performed in 2007-2008.
The divertor activities have progressed with the aim of launching the procurement according to the ITER project schedule. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Ioki, K.; Barabash, V.; Cordier, J.; Merola, M.; Morimoto, M.; Pick, M.; Rozov, V.; Shimada, M.; Utin, Yu.; Wang, X.; Yu, J.] ITER Org, F-13108 St Paul Les Durance, France.
[Enoeda, M.; Nakahira, M.; Suzuki, S.] JAEA, Naka, Ibaraki 3110193, Japan.
[Federici, G.] EFDA, D-85748 Garching, Germany.
[Kim, B. C.] NFRC, Taejon 305333, South Korea.
[Mazul, I.] Efremov Inst, St Petersburg, Russia.
[Ulrickson, M.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Wu, S.] ASIPP, Hefei 230031, Anhui, Peoples R China.
RP Ioki, K (reprint author), ITER Org, F-13108 St Paul Les Durance, France.
EM Kimihiro.loki@iter.org
NR 10
TC 14
Z9 14
U1 1
U2 4
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD DEC
PY 2008
VL 83
IS 7-9
BP 787
EP 794
DI 10.1016/j.fusengdes.2008.05.027
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 391HJ
UT WOS:000262224100002
ER
PT J
AU Wilson, PPH
Feder, R
Fischer, U
Loughlin, M
Petrizzi, L
Wu, Y
Youssef, M
AF Wilson, P. P. H.
Feder, R.
Fischer, U.
Loughlin, M.
Petrizzi, L.
Wu, Y.
Youssef, M.
TI State-of-the-art 3-D radiation transport methods for fusion energy
systems
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Fusion Nuclear Technology
CY SEP 30-OCT 05, 2007
CL Heidelberg, GERMANY
SP Forschungszentrum Karlsruhe
DE Fusion neutronics; ITER; Advanced simulation; Monte carlo; Discrete
ordinates; Three-dimensional
ID NEUTRONICS ANALYSIS; ITER; INTERFACE; MODEL
AB Recent advances in radiation transport simulation tools enable an increased fidelity and accuracy in modeling complex geometries in fusion systems. Future neutronics calculations will increasingly be based directly on these 3-D CAD-based geometries, allowing enhanced model complexity and improved quality assurance. Improvements have been made in both stochastic and deterministic radiation transport methodologies and their new capabilities will be compared briefly. A code comparison benchmark exercise has been specified based on a 40 sector of the ITER machine and the analysis results show good agreement. Additional analyses will be discussed, with particular attention to how these new capabilities provide new insights for engineering design of ITER components. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Wilson, P. P. H.] Univ Wisconsin, Madison, WI 53706 USA.
[Feder, R.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Fischer, U.] Forschungszentrum Karlsruhe, D-76344 Eggenstein Leopoldshafen, Germany.
[Loughlin, M.] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 1PR, Oxon, England.
[Petrizzi, L.] ENEA Frascati, I-00044 Frascati, Italy.
[Wu, Y.] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China.
[Youssef, M.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
RP Wilson, PPH (reprint author), Univ Wisconsin, 1500 Engn Dr, Madison, WI 53706 USA.
EM wilsonp@engr.wisc.edu
OI Wilson, Paul/0000-0002-8555-4410
NR 29
TC 35
Z9 39
U1 2
U2 19
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD DEC
PY 2008
VL 83
IS 7-9
BP 824
EP 833
DI 10.1016/j.fusengdes.2008.05.038
PG 10
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 391HJ
UT WOS:000262224100007
ER
PT J
AU Abe, K
Kohyama, A
Tanaka, S
Namba, C
Terai, T
Kunugi, T
Muroga, T
Hasegawa, A
Sagara, A
Berk, S
Zinkle, SJ
Sze, DK
Petti, DA
Abdou, MA
Morley, NB
Kurtz, RJ
Snead, LL
Ghoniem, NM
AF Abe, K.
Kohyama, A.
Tanaka, S.
Namba, C.
Terai, T.
Kunugi, T.
Muroga, T.
Hasegawa, A.
Sagara, A.
Berk, S.
Zinkle, S. J.
Sze, D. K.
Petti, D. A.
Abdou, M. A.
Morley, N. B.
Kurtz, R. J.
Snead, L. L.
Ghoniem, N. M.
TI Development of advanced blanket performance under irradiation and system
integration through JUPITER-II project
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Fusion Nuclear Technology
CY SEP 30-OCT 05, 2007
CL Heidelberg, GERMANY
SP Forschungszentrum Karlsruhe
DE Advanced blanket; Flibe; Lithium; Vanadium; SiC; JUPITER-II
ID SILICON-CARBIDE COMPOSITES; THERMAL-CREEP; MOLTEN FLIBE; DESIGNS; REDOX;
BERYLLIUM; COATINGS; VANADIUM; TRITIUM; ALLOYS
AB The Japan-USA collaborative program, JUPITER-II, has made significant progress in a research program titled "The irradiation performance and system integration of advanced blanket" through a six-year plan for 2001-2006. The scientific concept of this program is to study the elemental technology in macroscopic system integration for advanced fusion blankets based on an understanding of the relevant mechanics at the microscopic level. The program has four main research emphases:
(1) Flibe molten salt system: Flibe handling, reduction-oxidation control by Be and Flibe tritium chemistry: thermofluid flow simulation experiment and numerical analysis.
(2) Vanadium /Li system: MHD ceramics coating of vanadium alloys and compatibility with Li: neutron irradiation experiment in Li capsule and radiation creep.
(3) SiC/He system: Fabrication of advanced composites and property evaluation; thermomechanics of SiC system with solid breeding materials; neutron irradiation experiment in He capsule at high temperatures.
(4) Blanket system modeling: Design-based integration modeling of Flibe system and V/Li system; multiscale materials system modeling including He effects.
This paper describes the perspective of the program including the historical background, the organization and facilities, and the task objectives. Important recent results are reviewed. (c) 2008 Published by Elsevier B.V.
C1 [Abe, K.; Hasegawa, A.] Tohoku Univ, Grad Sch Engn, Sendai, Miyagi 9808579, Japan.
[Kohyama, A.] Kyoto Univ, Inst Adv Energy, Uji, Kyoto 611011, Japan.
[Tanaka, S.; Terai, T.] Univ Tokyo, Grad Sch Engn, Bunkyo Ku, Tokyo 1136654, Japan.
[Namba, C.; Muroga, T.; Sagara, A.] Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan.
[Berk, S.] US DOE, Washington, DC USA.
[Zinkle, S. J.; Snead, L. L.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Sze, D. K.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Petti, D. A.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
[Abdou, M. A.; Morley, N. B.; Ghoniem, N. M.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
[Kurtz, R. J.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Abe, K (reprint author), Hachinohe Inst Technol, Res Inst Interdisciplinary Sci, 88-1 Myo Ohbiraki, Hachinohe, Aomori 0318501, Japan.
EM k-abe@hi-tech.ac.jp
OI Zinkle, Steven/0000-0003-2890-6915
NR 30
TC 8
Z9 9
U1 2
U2 12
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD DEC
PY 2008
VL 83
IS 7-9
BP 842
EP 849
DI 10.1016/j.fusengdes.2008.07.028
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 391HJ
UT WOS:000262224100009
ER
PT J
AU Morley, NB
Katoh, Y
Malang, S
Pint, BA
Raffray, AR
Sharafat, S
Smolentsev, S
Youngblood, GE
AF Morley, N. B.
Katoh, Y.
Malang, S.
Pint, B. A.
Raffray, A. R.
Sharafat, S.
Smolentsev, S.
Youngblood, G. E.
TI Recent research and development for the dual-coolant blanket concept in
the US
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Fusion Nuclear Technology
CY SEP 30-OCT 05, 2007
CL Heidelberg, GERMANY
SP Forschungszentrum Karlsruhe
DE Dual-coolant lead-lithium; Blanket; MHD; Pb-17Li; Conductivity;
Compatibility; Tritium permeation
ID DENSITY CONSERVATIVE SCHEME; INCOMPRESSIBLE MHD FLOWS; MAGNETIC
REYNOLDS-NUMBER; COMPATIBILITY ISSUES; POWER-PLANT; ARIES-CS; PB-17LI
BLANKET; SILICON-CARBIDE; FUSION; TEMPERATURE
AB The dual-coolant lead-lithium, or DCLL, blanket concept is of strong interest in the US fusion technology program. In the DCLL blanket, the flow channel insert (FCI) is a critical component. FCIs must have low electrical and thermal conductivity and be compatible with lead-lithium eutectic alloy (Pb-17Li) at elevated temperatures. FCIs must retain structural integrity and desirable properties even under irradiation and large temperature gradients during operation. FCIs must not fail in such a way that Pb-17Li enters the FCI and changes its electrical or thermal conductivity significantly. Another important issue for the DCLL is the development of a suitable tritium extraction from the Pb-17Li to achieve low tritium partial pressure, thus facilitating decisive tritium control. In this paper, the state of DCLL development in the US is presented including recent design modifications and results from recent R&D efforts. Such R&D includes the progress on development and property quantification of SiC/SiC composites and SiC foams as candidate FCI materials; Pb-17Li material capability and infiltration studies; simulations of MHD Pb-17Li flow characteristics and of resultant temperature distributions; and the analysis of FCI stress states based on these thermal loads. In addition, tritium extraction from Pb-17Li based on a vacuum permeator concept is shown to have the potential to achieve the desired tritium control. A discussion of DCLL optimization and unresolved DCLL issues and future R&D needs is also presented. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Morley, N. B.; Sharafat, S.; Smolentsev, S.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
[Katoh, Y.; Pint, B. A.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Raffray, A. R.] Univ Calif San Diego, Energy Res Ctr, La Jolla, CA 90093 USA.
[Youngblood, G. E.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Morley, NB (reprint author), Univ Calif Los Angeles, 43-133 Engn 4, Los Angeles, CA 90095 USA.
EM morley@fusion.ucla.edu
RI Pint, Bruce/A-8435-2008;
OI Pint, Bruce/0000-0002-9165-3335; Katoh, Yutai/0000-0001-9494-5862
NR 31
TC 42
Z9 43
U1 1
U2 12
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD DEC
PY 2008
VL 83
IS 7-9
BP 920
EP 927
DI 10.1016/j.fusengdes.2008.04.012
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 391HJ
UT WOS:000262224100020
ER
PT J
AU El-Guebaly, L
Massaut, V
Tobita, K
Cadwallader, L
AF El-Guebaly, L.
Massaut, V.
Tobita, K.
Cadwallader, L.
TI Goals, challenges, and successes of managing fusion activated materials
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Fusion Nuclear Technology
CY SEP 30-OCT 05, 2007
CL Heidelberg, GERMANY
SP Forschungszentrum Karlsruhe
DE Fusion radwaste management; Recycling; Clearance: Fusion power plant
ID WASTE MANAGEMENT; POWER-PLANTS; CLEARANCE; FEASIBILITY; REACTORS; ISSUES
AB After decades of designing magnetic and inertial fusion power plants, it is timely to develop a new framework for managing the activated (and contaminated) materials that will be generated during plant operation and after decommissioning-a framework that takes into account the lessons learned from numerous international fusion and fission studies and the environmental, political, and present reality in the U.S., Europe, and Japan. This will clearly demonstrate that designers developing fusion facilities will be dealing with the back end of this type of energy production from the beginning of the conceptual design of power plants. It is becoming evident that future regulations for geological burial will be upgraded to assure tighter environmental controls. Along with the political difficulty of constructing new repositories worldwide, the current reality suggests reshaping all aspects of handling the continual stream of fusion active materials. Beginning in the mid 1980s and continuing to the present, numerous fusion designs examined replacing the disposal option with more environmentally attractive approaches. redirecting their attention to recycling and clearance while continuing the development of materials with low activation potential. There is a growing international effort in support of this new trend. In this paper, recent history is analyzed, a new fusion waste management scheme is covered, and possibilities for how its prospects can be improved are examined. Published by Elsevier B.V.
C1 [El-Guebaly, L.] Univ Wisconsin, Madison, WI 53706 USA.
[Tobita, K.] Japan Atom Energy Agcy, Ibaraki, Japan.
[Cadwallader, L.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP El-Guebaly, L (reprint author), Univ Wisconsin, 1500 Engn Dr,Room 431, Madison, WI 53706 USA.
EM elguebaly@engr.wisc.edu
RI Cadwallader, Lee/F-6933-2014
NR 26
TC 16
Z9 17
U1 0
U2 3
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD DEC
PY 2008
VL 83
IS 7-9
BP 928
EP 935
DI 10.1016/j.fusengdes.2008.05.025
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 391HJ
UT WOS:000262224100021
ER
PT J
AU Mehihorn, TA
Cipiti, BB
Olson, CL
Rochau, GE
AF Mehihorn, T. A.
Cipiti, B. B.
Olson, C. L.
Rochau, G. E.
TI Fusion-fission hybrids for nuclear waste transmutation: A synergistic
step between Gen-IV fission and fusion reactors
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Fusion Nuclear Technology
CY SEP 30-OCT 05, 2007
CL Heidelberg, GERMANY
SP Forschungszentrum Karlsruhe
DE Nuclear waste transmutation; Fusion energy; Fusion reactor materials
ID POWER; TECHNOLOGY; DESIGN; ENERGY; IRON
AB Energy demand and GDP per capita are strongly correlated, while public concern over the role of energy in climate change is growing. Nuclear power plants produce 16% of world electricity demands without greenhouse gases. Generation-IV advanced nuclear energy systems are being designed to be safe and economical. Minimizing the handling and storage of nuclear waste is important. NIF and ITER are bringing sustainable fusion energy closer, but a significant gap in fusion technology development remains. Fusion-fission hybrids could be a synergistic step to a pure fusion economy and act as a technology bridge. We discuss how a pulsed power-driven Z-pinch hybrid system producing only 20 MW of fusion yield can drive a sub-critical transuranic blanket that transmutes 1280 kg of actinide wastes per year and produces 3000 MW. These results are applicable to other inertial and magnetic fusion energy systems. A hybrid system could be introduced somewhat sooner because of the modest fusion yield requirements and can provide both a safe alternative to fast reactors for nuclear waste transmutation and a maturation path for fusion technology. The development and demonstration of advanced materials that withstand high-temperature, high-irradiation environments is a fundamental technology issue that is common to both fusion-fission hybrids and Generation-IV reactors. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Mehihorn, T. A.; Cipiti, B. B.; Olson, C. L.; Rochau, G. E.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Mehihorn, TA (reprint author), Sandia Natl Labs, POB 5800,MS 1181, Albuquerque, NM 87185 USA.
EM tamehlh@sandia.gov
NR 28
TC 5
Z9 7
U1 3
U2 15
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD DEC
PY 2008
VL 83
IS 7-9
BP 948
EP 953
DI 10.1016/j.fusengdes.2008.05.003
PG 6
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 391HJ
UT WOS:000262224100024
ER
PT J
AU Moses, EI
Meier, WR
AF Moses, Edward I.
Meier, Wayne R.
TI Preparing for ignition experiments on the National Ignition Facility
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Fusion Nuclear Technology
CY SEP 30-OCT 05, 2007
CL Heidelberg, GERMANY
SP Forschungszentrum Karlsruhe
DE Laser; Inertial confinement fusion; Inertial fusion energy
ID LASER FUSION IGNITION; GAIN
AB The National Ignition Facility (NIF) is a 192 beam Nd-glass laser facility presently under construction at Lawrence Livermore National Laboratory (LLNL) for performing ignition experiments for inertial confinement fusion (ICF) and experiments Studying high energy density (HED) science. NIF will produce 1.8 MJ. 500TW of ultraviolet light (lambda = 351 nm) making it the world's largest and most powerful laser system. NIF will be the world's preeminent facility for the Study of matter at extreme temperatures and densities producing and for developing ICE The ignition studies will an essential step in developing inertial fusion energy. The NIF Project is over 93% complete and scheduled for completion in 2009. Experiments using one beam have demonstrated that NIF can meet all of its performance goals. A detailed plan called the National Ignition Campaign (NIC) has been developed to begin ignition experiments in 2010. The plan includes the target physics and the equipment such as diagnostics, cryogenic target manipulator and user optics required for the ignition experiment. Target designs have been developed that calculate to ignite at energy as low as I MJ. Plans are underway to make NIF a national user facility for experiments on HED physics and nuclear science, including experiments relevant to the development of IFE. (C) 2008 Published by Elsevier B.V.
C1 [Moses, Edward I.; Meier, Wayne R.] LLNL, Livermore, CA 94551 USA.
RP Meier, WR (reprint author), LLNL, POB 808,L-637, Livermore, CA 94551 USA.
EM meier5@llnl.gov
NR 8
TC 4
Z9 4
U1 0
U2 0
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD DEC
PY 2008
VL 83
IS 7-9
BP 997
EP 1000
DI 10.1016/j.fusengdes.2008.05.043
PG 4
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 391HJ
UT WOS:000262224100031
ER
PT J
AU Hassanein, A
Sizyuk, T
Ulrickson, M
AF Hassanein, A.
Sizyuk, T.
Ulrickson, M.
TI Vertical displacement events: A serious concern in future ITER operation
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Fusion Nuclear Technology
CY SEP 30-OCT 05, 2007
CL Heidelberg, GERMANY
SP Forschungszentrum Karlsruhe
DE ITER; Plasma-facing component; VDE; Coolant channel; Heat load; 3D
simulation
ID HEAT-TRANSFER; DISRUPTIONS; TUBES
AB Material damage to plasma-facing components due to the frequent loss of plasma confinement remains a serious problem for tokamak reactors and in particular for ITER-like design. The deposited plasma energy during major disruptions, edge-localized modes (ELM), and vertical displacement events (VDE) causes significant surface erosion, possible structural failure, and frequent plasma contamination. Surface erosion damage consists of vaporization, spallation, and liquid splatter of metallic materials. Structural damage includes large temperature increases and high thermal stresses in structural materials and at the interfaces between surface coatings and structural components. A comprehensive fully 3D model (contained in the HEIGHTS computer simulation package) is developed to specifically study the longer plasma instabilities that cause VDE. The model includes detail deposition processes, surface vaporization, phase change and melting, heat conduction to coolant channels, and critical heat flux criteria at the coolant channels. The design requirements and implications of plasma-facing components are discussed along with recommendations to mitigate and reduce the effects of plasma instabilities on reactor components. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Hassanein, A.; Sizyuk, T.] Purdue Univ, Sch Nucl Engn, W Lafayette, IN 47907 USA.
[Ulrickson, M.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Hassanein, A (reprint author), Purdue Univ, Sch Nucl Engn, Nucl Engn Bldg,400 Cent Dr, W Lafayette, IN 47907 USA.
EM hassanein@purdue.edu
NR 11
TC 9
Z9 9
U1 2
U2 5
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD DEC
PY 2008
VL 83
IS 7-9
BP 1020
EP 1024
DI 10.1016/j.fusengdes.2008.05.032
PG 5
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 391HJ
UT WOS:000262224100035
ER
PT J
AU Youchison, DL
Natoni, G
Narula, M
Ying, A
AF Youchison, Dennis L.
Natoni, Greg
Narula, Manmeet
Ying, Alice
TI Computational thermo-fluid exploratory design analysis for complex ITER
first wall/shield components
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Fusion Nuclear Technology
CY SEP 30-OCT 05, 2007
CL Heidelberg, GERMANY
SP Forschungszentrum Karlsruhe
DE ITER; Plasma facing components; First wall; Shield; Computational fluid
dynamics; Neutronics; Thermal stress; Finite element method
AB Engineers in the ITER US Party Team used several computational fluid dynamics codes to evaluate design concepts for the ITER first wall panels and the neutron shield modules. The CFdesign code enabled them to perform design Studies of modules 7 and 13 very efficiently. CFdesign provides a direct interface to the CAD program, CATIA v5. The geometry input and meshing are greatly simplified. CFdesign is a finite element code, rather than a finite Volume code. Flow experiments and finite volume calculations from SC-Tetra, Fluent and CFD2000 verified the CFdesign results. Several new enhancements allow CFdesign to export temperatures, pressures and convective heat transfer coefficients to other finite element models for further analysis. For example, these loads and boundary conditions directly feed into codes Such as ABAQUS to perform stress analysis. In this article, we review the use of 2- and 4-mm flow driver gaps in the shield modules and the use of 1-mm gaps along the tee-vane in the front water header to obtain a good flow distribution in both the first wall and shield modules for 7 and 13. Plasma heat flux as well as neutron hearing derived from MCNP calculations is included in the first wall and shield module analyses, We reveal the non-uniformity of the convective heat transfer coefficient inside complex 3D geometries exposed to a one-sided heat flux and non-uniform volumetric hearing. Most models consisted of 3-4 million tetrahedron elements. We obtained temperature and velocity distributions, as well as pressure drop information, for models of nearly exact geometry compared to the CATIA fabrication models. We also describe the coupling to thermal stress analysis in ABAQUS. The results presented provide confidence that the preliminary design of these plasma facing components will meet ITER requirements. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Youchison, Dennis L.; Natoni, Greg] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Narula, Manmeet; Ying, Alice] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
RP Youchison, DL (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM dlyouch@sandia.gov
OI Youchison, Dennis/0000-0002-7366-1710
NR 10
TC 3
Z9 3
U1 0
U2 2
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD DEC
PY 2008
VL 83
IS 7-9
BP 1025
EP 1033
DI 10.1016/j.fusengdes.2008.08.013
PG 9
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 391HJ
UT WOS:000262224100036
ER
PT J
AU Kotulski, JD
Coats, RS
Pasik, MF
AF Kotulski, J. D.
Coats, R. S.
Pasik, M. F.
TI Electromagnetic analysis of transient disruption forces on the ITER
shield modules
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Fusion Nuclear Technology
CY SEP 30-OCT 05, 2007
CL Heidelberg, GERMANY
SP Forschungszentrum Karlsruhe
DE Eddy currents; Electromagnetic force computation; ITER
AB This paper describes the eddy current computation and the resultant forces and torques on selected shield modules assigned to the US team that occur due to plasma disruption. The plasma disruption considered is referred to as major disruption (MD) and is one of the disruption cases defined by the International Organization (10). This paper identifies the applicability of geometrical simplifications for future design analyses. In particular it is shown that cutting a module in half does not preserve the physics of the eddy current generation and resultant calculations while modeling a full module including the nearest modules does preserve the fundamental physics. The force results are shown for shield modules 7 and 13 exposing the validity of geometrical simplifications. The computed torque for these two modules is also presented. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Kotulski, J. D.; Coats, R. S.; Pasik, M. F.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Kotulski, JD (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM jdkotul@sandia.gov
NR 5
TC 11
Z9 12
U1 0
U2 3
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD DEC
PY 2008
VL 83
IS 7-9
BP 1068
EP 1071
DI 10.1016/j.fusengdes.2008.08.039
PG 4
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 391HJ
UT WOS:000262224100044
ER
PT J
AU McDonald, JM
Lutz, TJ
Youchison, DL
Bauer, FJ
Troncosa, KP
Nygren, RE
AF McDonald, J. M.
Lutz, T. J.
Youchison, D. L.
Bauer, F. J.
Troncosa, K. P.
Nygren, R. E.
TI The Sandia Plasma Materials Test Facility in 2007
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Fusion Nuclear Technology
CY SEP 30-OCT 05, 2007
CL Heidelberg, GERMANY
SP Forschungszentrum Karlsruhe
DE Component; First wall; High heat flux
ID PUMP LIMITER; HEAT
AB The Plasma Materials Test Facility, in its third decade of operation at Sandia National Laboratories, upgraded the 30-kW system to 60kW (EB60) with a new gun, grid control and power supply. In 2007 we are testing mockups in EB60 to assess processes for joining Be to CuCrZr and CuCrZr to 316LN-IG for the fabrication of US first wall (FW) panels for ITER. In our 1.2 MW dual gun electron beam, EB1200, we will test Be-armored FW quality mockups of the US and other ITER Parties. Published by Elsevier B.V.
C1 [McDonald, J. M.; Lutz, T. J.; Youchison, D. L.; Bauer, F. J.; Troncosa, K. P.; Nygren, R. E.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Nygren, RE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM renygre@sandia.gov
OI Youchison, Dennis/0000-0002-7366-1710
NR 12
TC 9
Z9 9
U1 0
U2 1
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD DEC
PY 2008
VL 83
IS 7-9
BP 1087
EP 1091
DI 10.1016/j.fusengdes.2008.06.062
PG 5
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 391HJ
UT WOS:000262224100048
ER
PT J
AU Calderoni, P
Sharpe, P
Hara, M
Oya, Y
AF Calderoni, P.
Sharpe, P.
Hara, M.
Oya, Y.
TI Measurement of tritium permeation in flibe (2LiF-BeF2)
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Fusion Nuclear Technology
CY SEP 30-OCT 05, 2007
CL Heidelberg, GERMANY
SP Forschungszentrum Karlsruhe
DE Fusion; Tritium; Molten salt; Diffusivity; Solubility
ID LI2BEF4 MOLTEN-SALT; HYDROGEN; DIFFUSION; BEHAVIOR; SOLUBILITIES;
DEUTERIUM; NICKEL
AB This paper reports on the experimental investigation Of tritium permeation in flibe (2l.iF-BeF2) at the Safety and Tritium Applied Research facility of the Idaho National Laboratory. A stainless steel cell formed by two independent volumes separated by a 2-mm thick nickel membrane is maintained at temperatures between 500 and 700 degrees C. A controlled amount of T-2 gas is flown in excess of argon in the source volume in contact with the bottom side of the nickel membrane,while a layer of mol ten salt is in con tact with the top side. The tritium permeating above the liquid surface is carried by an argon flow to a diagnostic system comprised of a quadrupole in ass spectrorneter, a gas chromatographer and a proportional counter. Tritium permeability in flibe as a function of temperature is determined by the measured permeation flow rates reached in steady-state conditions, while the diffusivity is determined by fitting the transient process with the analytical solution for the diffusion process. As a result, the solubility of tritium in flibe as a function of temperature is also determined. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Calderoni, P.; Sharpe, P.] Idaho Natl Lab, Fus Safety Program, Idaho Falls, ID 83415 USA.
[Hara, M.] Toyama Univ, Hydrogen Isotope Res Ctr, Gofu Ku 3190, Toyama 9308555, Japan.
[Oya, Y.] Shizuoka Univ, Radiochem Res Lab, Shizuoka 4228059, Japan.
RP Calderoni, P (reprint author), Idaho Natl Lab, Fus Safety Program, POB 1625,MS 7113, Idaho Falls, ID 83415 USA.
EM Pattrick.Calderoni@inl.gov
OI Calderoni, Pattrick/0000-0002-2316-6404
NR 16
TC 8
Z9 9
U1 0
U2 11
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD DEC
PY 2008
VL 83
IS 7-9
BP 1331
EP 1334
DI 10.1016/j.fusengdes.2008.05.016
PG 4
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 391HJ
UT WOS:000262224100094
ER
PT J
AU Tanigawa, H
Hirose, T
Shiba, K
Kasada, BR
Wakaia, E
Serizawa, H
Kawahito, Y
Jitsukawa, S
Kimura, A
Kohno, Y
Kohyama, A
Katayama, S
Mori, H
Nishimoto, K
Klueh, RL
Sokolov, MA
Stoller, RE
Zinkle, SJ
AF Tanigawa, H.
Hirose, T.
Shiba, K.
Kasada, B. R.
Wakaia, E.
Serizawa, H.
Kawahito, Y.
Jitsukawa, S.
Kimura, A.
Kohno, Y.
Kohyama, A.
Katayama, S.
Mori, H.
Nishimoto, K.
Klueh, R. L.
Sokolov, M. A.
Stoller, R. E.
Zinkle, S. J.
TI Technical issues of reduced activation ferritic/martensitic steels for
fabrication of ITER test blanket modules
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Fusion Nuclear Technology
CY SEP 30-OCT 05, 2007
CL Heidelberg, GERMANY
SP Forschungszentrum Karlsruhe
DE RAFM; F82H; TBM; WCSB; Fabrication; Weld; HAZ; Over-tempered HAZ;
Irradiation effect
ID MECHANICAL-PROPERTIES; MICROSTRUCTURE; F82H; BEHAVIOR; HEAT; HFIR
AB Reduced activation ferritic/martensitic steels (RAFMs) are recognized as the primary candidate structural materials for fusion blanket systems. The RAFM F82H was developed in Japan with emphasis on high-temperature properties and weldability. Extensive irradiation studies have conducted on F82H, and it has the most extensive available database of irradiated and unirradiated properties of all RAFMs. The objective of this paper is to review the R&D status of F82H and to identify the key technical issues for the fabrication of an ITER test blanket module (TBM) suggested from the recent research achievements in Japan. This work clarified that the primary issues with F82H involve welding techniques and the mechanical properties of weld joints. This is the result of the distinctive nature of the joint caused by the phase transformation that occurs in the weld joint during cooling, and its impact on the design of a TBM will be discussed. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Tanigawa, H.; Hirose, T.; Shiba, K.; Wakaia, E.; Jitsukawa, S.] Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan.
[Kasada, B. R.; Kimura, A.; Kohyama, A.] Kyoto Univ, Inst Adv Energy, Kyoto 6110011, Japan.
[Serizawa, H.; Kawahito, Y.; Katayama, S.] Osaka Univ, Joining & Welding Res Inst, Osaka 5670047, Japan.
[Kohno, Y.] Muroran Inst Technol, Dept Mat Sci & Engn, Muroran, Hokkaido 0508585, Japan.
[Mori, H.; Nishimoto, K.] Osaka Univ, Div Mat & Mfg Sci, Suita, Osaka 5650871, Japan.
[Klueh, R. L.; Sokolov, M. A.; Stoller, R. E.; Zinkle, S. J.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Tanigawa, H (reprint author), Japan Atom Energy Agcy, Fus Res & Dev Directorate, Fus Struct Mat Dev Grp, 2-4 Shirakata Shirane, Naka, Ibaraki 3191195, Japan.
EM tanigawa.hiroyasu@jaea.go.jp
RI Stoller, Roger/H-4454-2011; Kasada, Ryuta/D-6350-2011;
OI Kasada, Ryuta/0000-0002-5641-6158; Zinkle, Steven/0000-0003-2890-6915
NR 28
TC 58
Z9 62
U1 1
U2 34
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD DEC
PY 2008
VL 83
IS 10-12
BP 1471
EP 1476
DI 10.1016/j.fusengdes.2008.07.024
PG 6
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 391HL
UT WOS:000262224300026
ER
PT J
AU Nogami, S
Otake, N
Hasegawa, A
Katoh, Y
Yoshikawa, A
Satou, M
Oya, Y
Okuno, K
AF Nogami, S.
Otake, N.
Hasegawa, A.
Katoh, Y.
Yoshikawa, A.
Satou, M.
Oya, Y.
Okuno, K.
TI Oxidation behavior of SiC/SiC composites for helium cooled solid breeder
blanket
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Fusion Nuclear Technology
CY SEP 30-OCT 05, 2007
CL Heidelberg, GERMANY
SP Forschungszentrum Karlsruhe
DE SiC/SiC composite; Oxidation; Interface; Thermal gravimetric analysis;
Helium cooled solid breeder blanket
ID MECHANISMS; KINETICS
AB In order to evaluate the oxidation behavior and mechanism of SiC/SiC composites with conventional pyrolitic graphite interface (PyC-SiC/SiC) and advanced multilayer interface (ML-SiC/SiC) in a HCSB blanket environment,a thermal gravimetric analysis (TGA) in He + O(2) environment at 1000 degrees C and 1200 degrees C was performed. The PyC-SiC/SiC at 1200 degrees C and the ML-SiC/SiC at 1000 degrees C and 1200 degrees C showed relatively smaller weight change during oxidation because SiO(2) formed on the SiC-matrix and SiC-fiber sealed the specimen surface before the PyC interface recession by gasification of graphite due to relatively high SiO(2) formation rate. While the PyC-SiC/SiC at 1000 degrees C showed significant weight loss because the specimen surface was not sealed by SiO(2) and significant PyC interface recession occurred due to relatively Slow SiO(2) formation. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Nogami, S.; Otake, N.; Hasegawa, A.; Satou, M.] Tohoku Univ, Dept Quantum Sci & Energy Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan.
[Katoh, Y.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Yoshikawa, A.; Oya, Y.; Okuno, K.] Shizuoka Univ, Fac Sci, Radiochem Res Lab, Suruga Ku, Shizuoka 4228529, Japan.
RP Nogami, S (reprint author), Tohoku Univ, Dept Quantum Sci & Energy Engn, Aoba Ku, 6-6-01 Aramaki Aza Aoba, Sendai, Miyagi 9808579, Japan.
EM shuhei.nogami@qse.tohoku.ac.jp
OI Katoh, Yutai/0000-0001-9494-5862
NR 9
TC 10
Z9 11
U1 0
U2 8
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD DEC
PY 2008
VL 83
IS 10-12
BP 1490
EP 1494
DI 10.1016/j.fusengdes.2008.06.004
PG 5
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 391HL
UT WOS:000262224300029
ER
PT J
AU Youssef, MZ
Feder, R
Davis, IM
AF Youssef, Mahmoud Z.
Feder, Russell
Davis, Ian M.
TI Neutronics analysis of the international thermonuclear experimental
reactor (ITER) MCNP "Benchmark CAD Model" with the ATTILA discrete
ordinance code
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Fusion Nuclear Technology
CY SEP 30-OCT 05, 2007
CL Heidelberg, GERMANY
SP Forschungszentrum Karlsruhe
DE ATTILA discrete ordinates code; CAD-based Neutronics Model; ITER
neutronics benchmarking; Codes verification; Nuclear quality assurance
AB There is currently extensive effort to develop and benchmark new codes to supplement the accepted computational tools for the nuclear design of ITER. The ITER management and quality program (MQP) officially requested benchmarking the newly developed FEM 3D, discrete ordinates code, ATTILA, to the results obtained by the CAD-based MCNP Monte Carlo codes. CAD-based computational tools are needed to reduce the turnaround time between changes in design and the subsequent nuclear analysis to key design parameters in an iterative process. There is currently extensive effort to develop and use a CAD-MCNP interface for design purposes to facilitate the modeling and analyses. ATTILA uses CAD-based geometrical input and as such it is a potentially quicker alternative to the MCNP code for the neutronics studies contingent on its success in predicting key neutronics parameters in large systems such as ITER. The ITER neutronics community had agreed to use a standard CAD model of ITER (401 sector, denoted as "Benchmark CAD Model") to compare results for several responses selected for calculation benchmarking purposes to test the efficiency and accuracy of the CAD-MCNP approach developed by each ITER party in addition to ATTILA. In this paper we report Such comparison to the results of the CAD-based MCNP developed at the University of Wisconsin for five selected nuclear responses. It is shown that ATTILA's results are within 25-30% of the MCNP results. Published by Elsevier B.V.
C1 [Youssef, Mahmoud Z.] Univ Wisconsin Madison, Univ Calif Los Angeles, Los Angeles, CA 90025 USA.
[Feder, Russell] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Davis, Ian M.] Transpire Inc, Gig Harbor, WA 98335 USA.
RP Youssef, MZ (reprint author), Univ Wisconsin Madison, Univ Calif Los Angeles, 43-133 Engn 4 Bldg, Los Angeles, CA 90025 USA.
EM youssef@fusion.ucla.edu; rfeder@pppl.gov; ian@transpireinc.com
NR 11
TC 11
Z9 11
U1 0
U2 0
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD DEC
PY 2008
VL 83
IS 10-12
BP 1661
EP 1668
DI 10.1016/j.fusengdes.2008.05.040
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 391HL
UT WOS:000262224300061
ER
PT J
AU Humrickhouse, P
Sharpe, JP
AF Humrickhouse, P. W.
Sharpe, J. P.
TI Dust mobilization and transport modeling for loss of vacuum accidents
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Fusion Nuclear Technology
CY SEP 30-OCT 05, 2007
CL Heidelberg, GERMANY
SP Forschungszentrum Karlsruhe
DE Dust mobilization; Tokamak dust; Aerosol dynamics; Granular flow; Soil
mechanics; Constitutive modeling
ID FLOW
AB We develop a general continuum fluid dynamic model for dust transport in loss of vacuum accidents in fusion energy systems. The relationship between this general approach and established particle transport methods is clarified, in particular the relationship between the seemingly disparate treatments of aerosol dynamics and Lagrangian particle tracking. Constitutive equations for granular flow are found to be inadequate for prediction of mobilization, as these models essentially impose a condition of flow from the outset. Experiments confirm that at low shear, settled dust piles behave more like a continuum solid, and suitable solid models will be required to predict the onset of dust mobilization. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Humrickhouse, P. W.; Sharpe, J. P.] Idaho Natl Lab, Fus Safety Program, Idaho Falls, ID 83415 USA.
[Humrickhouse, P. W.] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA.
RP Humrickhouse, P (reprint author), Idaho Natl Lab, Fus Safety Program, POB 1625,MS 3840, Idaho Falls, ID 83415 USA.
EM paul.humrickhouse@inl.gov
NR 11
TC 4
Z9 4
U1 0
U2 1
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD DEC
PY 2008
VL 83
IS 10-12
BP 1721
EP 1724
DI 10.1016/j.fusengdes.2008.05.005
PG 4
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 391HL
UT WOS:000262224300072
ER
PT J
AU Rodland, KD
Adkins, JN
Ansong, C
Chowdhury, S
Manes, NP
Shi, L
Yoon, H
Smith, RD
Heffron, F
AF Rodland, Karin D.
Adkins, Joshua N.
Ansong, Charles
Chowdhury, Saiful
Manes, Nathan P.
Shi, Liang
Yoon, Hyunjin
Smith, Richard D.
Heffron, Fred
TI Use of high-throughput mass spectrometry to elucidate host-pathogen
interactions in Salmonella
SO FUTURE MICROBIOLOGY
LA English
DT Review
DE host-pathogen interaction; intracellular pathogen; mass spectrometry;
proteomics; Salmonella; virulence
ID ENTERICA SEROVAR TYPHIMURIUM; PROTEIN IDENTIFICATION TECHNOLOGY; III
SECRETION SYSTEM; IN-VIVO; ISLAND 2; NATURAL-RESISTANCE; PROTEOMIC
ANALYSIS; ESCHERICHIA-COLI; MAMMALIAN-CELLS; CROSS-LINKING
AB Capabilities in mass spectrometry are evolving rapidly, with recent Improvements in sensitivity, data analysis and, most Important from the standpoint of this review, much higher throughput, allowing analysis of many samples in a single day. This short review describes how these Improvements in mass spectrometry can be used to dissect host-pathogen Interactions using Salmonella as a model system. This approach has enabled direct Identification of the majority of annotated Salmonella proteins, quantitation of expression changes under various in vitro growth conditions and new insights Into virulence and expression of Salmonella proteins within host cells. One of the most significant findings is that a relatively high percentage of all the annotated genes (>20%) in Salmonella are regulated post-transcriptionally. In addition, new and unexpected interactions have been Identified for several Salmonella virulence regulators that involve protein-protein interactions, suggesting additional functions of these regulators in coordinating virulence expression. Overall high-throughput mass spectrometry provides a new view of host-pathogen Interactions, emphasizing the protein products and defining how protein Interactions determine the outcome of infection,
C1 [Heffron, Fred] Oregon Hlth & Sci Univ, Dept Mol Microbiol & Immunol, Portland, OR 97239 USA.
[Rodland, Karin D.; Adkins, Joshua N.; Ansong, Charles; Chowdhury, Saiful; Manes, Nathan P.; Shi, Liang; Smith, Richard D.] Pacific NW Natl Lab, Richland, WA 99354 USA.
RP Heffron, F (reprint author), Oregon Hlth & Sci Univ, Dept Mol Microbiol & Immunol, Mail Drop L220,3181 SW Sam Jackson Rd, Portland, OR 97239 USA.
EM Karin.Rodland@pnl.gov; heffronhf@ohsu.edu
RI Manes, Nathan/E-2817-2012; Smith, Richard/J-3664-2012; Adkins,
Joshua/B-9881-2013
OI Manes, Nathan/0000-0001-6701-3314; Smith, Richard/0000-0002-2381-2349;
Adkins, Joshua/0000-0003-0399-0700
FU National Institute of Allergy and Infectious Diseases (NIH/DHHS)
[Y1-AI-4894-4801]; NIH National Center for Research Resources [RR18522];
Laboratory Directed Research and Development program at Pacific
Northwest National Laboratory (PNNL); US Department of Energy Office of
Biological; Environmental Research and National Center for Research
Resources [RR18522]; Battelle Memorial Institute [DE-AC05-76RLO-1830]
FX The authors gratefully acknowledge the funding sources for the described
projects: the National Institute of Allergy and Infectious Diseases
(NIH/DHHS through interagency agreement Y1-AI-4894-4801), the NIH
National Center for Research Resources (RR18522) and Laboratory Directed
Research and Development program at Pacific Northwest National
Laboratory (PNNL). Significant portions of this work were Performed in
the Environmental Molecular Science Laboratory, a US Department of
Energy (DOE) national scientific user facility at PNNL in Richland,
Washington. The authors also acknowledge the US Department of Energy
Office of Biological and Environmental Research and National Center for
Research Resources (RR18522) for the development of the instrumental
capabilities used for the research, PNNL is operated for the DOE by
Battelle Memorial Institute under contract DE-AC05-76RLO-1830. The
authors have no other relevant affiliations or financial involvement
with tiny organization or entity with a financial interest in or
financial conflict with the subject matter or materials discussed in the
manuscript apart from those disclosed. No writing assistance was
utilized in the production of this manuscript.
NR 73
TC 7
Z9 7
U1 1
U2 10
PU FUTURE MEDICINE LTD
PI LONDON
PA UNITEC HOUSE, 3RD FLOOR, 2 ALBERT PLACE, FINCHLEY CENTRAL, LONDON, N3
1QB, ENGLAND
SN 1746-0913
J9 FUTURE MICROBIOL
JI Future Microbiol.
PD DEC
PY 2008
VL 3
IS 6
BP 625
EP 634
DI 10.2217/17460913.3.6.625
PG 10
WC Microbiology
SC Microbiology
GA 388PG
UT WOS:000262031100011
PM 19072180
ER
PT J
AU MacLean, LCW
Tyliszczak, T
Gilbert, PUPA
Zhou, D
Pray, TJ
Onstott, TC
Southam, G
AF MacLean, L. C. W.
Tyliszczak, T.
Gilbert, P. U. P. A.
Zhou, D.
Pray, T. J.
Onstott, T. C.
Southam, G.
TI A high-resolution chemical and structural study of framboidal pyrite
formed within a low-temperature bacterial biofilm
SO GEOBIOLOGY
LA English
DT Article
ID MARINE-SEDIMENTS; IRON; PYRITIZATION; MONOSULFIDE; SULFIDES; MATRIX;
PLANTS
AB A novel, anaerobically grown microbial biofilm, scraped from the inner surface of a borehole, 1474 m below land surface within a South African, Witwatersrand gold mine, contains framboidal pyrite. Water flowing from the borehole had a temperature of 30.9 degrees C, a pH of 7.4, and an Eh of -50 mV. Examination of the biofilm using X-ray diffraction, field emission gun scanning electron microscope equipped for energy dispersive X-ray microanalysis demonstrated that the framboids formed within a matrix of bacteria and biopolymers. Focused ion beam sectioning of framboids followed by NEXAFS measurements using both scanning transmission X-ray microscopy and X-ray photoelectron emission microscopy revealed that the pyrite crystals grew within an organic carbon matrix consisting of exopolysaccharides and possibly extracellular DNA, which is intuitively important in sulfide mineral diagenesis. Growth of individual pyrite crystals within the framboid occurred inside organic templates confirms the association between framboidal pyrite and organic materials in low-temperature diagenetic environments and the important role of microenvironments in biofilms in regulating geochemical cycles.
C1 [MacLean, L. C. W.; Southam, G.] Univ Western Ontario, Dept Earth Sci, London, ON N6A 5B7, Canada.
[Tyliszczak, T.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Adv Light Source, Berkeley, CA 94720 USA.
[Gilbert, P. U. P. A.; Zhou, D.] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
[Pray, T. J.; Onstott, T. C.] Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA.
RP MacLean, LCW (reprint author), Nat Resources Canada, Environm Grp, Min & Mineral Sci Labs, 555 Booth St, O Hawa, ON K1A 0R1, Canada.
EM lmaclean@NRCan.gc.ca
RI Zhou, Dong/A-2675-2011; Southam, Gordon/D-1983-2013; Gilbert,
Pupa/A-6299-2010
OI Southam, Gordon/0000-0002-8941-1249; Gilbert, Pupa/0000-0002-0139-2099
FU National Science Foundation [EAR-9978267]; Director, Office of Science,
Office of Basic Energy Sciences; US Department of Energy
[DE-AC02-05CH11231]; NSF [DMR-DMR-0537588]
FX We acknowledge Harmony Gold Mine, Inc. for providing access to the
boreholes at Evander Mine and by Evander geologists Colin Ralston, and
Pete Roberts. Funding was provided by grant EAR-9978267 from the
National Science Foundation LExEn program to Onstott and Southam. The
Advanced Light Source is supported by the Director, Office of Science,
Office of Basic Energy Sciences, of the US Department of Energy under
contract no. DE-AC02-05CH11231. The Synchrotron Radiation Center is
supported by the NSF under Award No. DMR-DMR-0537588. We would like to
thank two anonymous reviewers whose comments greatly enhanced our
manuscript.
NR 46
TC 44
Z9 47
U1 3
U2 41
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1472-4677
J9 GEOBIOLOGY
JI Geobiology
PD DEC
PY 2008
VL 6
IS 5
BP 471
EP 480
DI 10.1111/j.1472-4669.2008.00174.x
PG 10
WC Biology; Environmental Sciences; Geosciences, Multidisciplinary
SC Life Sciences & Biomedicine - Other Topics; Environmental Sciences &
Ecology; Geology
GA 374RG
UT WOS:000261060800006
PM 19076638
ER
PT J
AU Kobelev, AP
Stefanovsky, SV
Lebedev, VV
Polkanov, AA
Knyazev, OA
Marra, JC
AF Kobelev, A. P.
Stefanovsky, S. V.
Lebedev, V. V.
Polkanov, A. A.
Knyazev, O. A.
Marra, J. C.
TI Cold crucible vitrification of the Savannah River Site SB2 HLW surrogate
at high waste loading
SO GLASS TECHNOLOGY-EUROPEAN JOURNAL OF GLASS SCIENCE AND TECHNOLOGY PART A
LA English
DT Article
AB Test vitrification of Savannah River Site sludge batch 2 (SB2) high level waste (HLW) surrogate was undertaken in the Radon full scale vitrification plant using a418 mm inner diameter cold crucible energised from a 160 kW high frequency (1.76 MHz) generator. Waste loading in the glass ranged between similar to 52-53 wt% and similar to 60 wt%, Commercially available alkali borosilicate Frit 320 was used as a glass forming additive. In total 1319.2 kg of feed was vitrified and 317.9 kg of glass was produced. The average AC power was 148.5 kW. The average slurry feeding rate was 25.6 kg/h, while the average glass production rate was 6.2 kg/h. Specific power consumption for slurry feeding was 5.8 kWh/kg, while the specific power consumption for glass production (melting ratio) was 24.0 kWh/kg. The specific glass production rate was 1084.8 kg/(m(2)d). Maximum slurry feeding and glass production rates were achieved by processing a slurry that had a water content of approximately 65 wt%. The products consisted of a vitreous matrix with a spinel structure magnetite type phase distributed in the matrix. The average degree of crystallinity ranged between 6 vol% at similar to 52-53 wt% waste loading to IS vol%, at similar to 60 wt% waste loading in the glassy product. The spinel phase was strongly enriched with iron and other transition elements (Cr, Mn, Ni, Cu, Zn) as well as Mg, whereas alkali, alkali earth elements and Zr, Pb, S, Cl entered the vitreous phase. At the highest waste loadings (55-57 wt% and above) all extra nepheline phase was produced. The major cations in the nepheline phase were Na, Al, Si and the minor ones were Fe, K, Sr, and Mg. A decrease in the silica content of the composition and nepheline formation in the resulting glass probably caused the decrease in chemical durability seen in the glass products with high waste loadings.
C1 [Kobelev, A. P.; Stefanovsky, S. V.; Lebedev, V. V.; Polkanov, A. A.; Knyazev, O. A.] SIA Radon, Moscow 119121, Russia.
[Marra, J. C.] Westinghouse Savannah River Co, Savannah River Lab, Aiken, SC 29808 USA.
RP Stefanovsky, SV (reprint author), SIA Radon, 7th Rostovskii Lane 2-14, Moscow 119121, Russia.
EM profstef@mtu-net.ru
NR 6
TC 5
Z9 5
U1 1
U2 4
PU SOC GLASS TECHNOLOGY
PI SHEFFIELD
PA UNIT 9, TWELVE O CLOCK COURT, 21 ATTERCLIFFE RD, SHEFFIELD S4 7WW, S
YORKSHIRE, ENGLAND
SN 1753-3546
J9 GLASS TECHNOL-PART A
JI Glass Technol.-Eur. J. Glass Sci. Technol. Part A
PD DEC
PY 2008
VL 49
IS 6
BP 307
EP 312
PG 6
WC Materials Science, Ceramics
SC Materials Science
GA 393GA
UT WOS:000262357900008
ER
PT J
AU Peterson, SK
Church, RL
AF Peterson, Steven K.
Church, Richard L.
TI A Framework for Modeling Rail Transport Vulnerability
SO GROWTH AND CHANGE
LA English
DT Article
AB Railroads represent one of the most efficient methods of long-haul transport for bulk commodities, from coal to agricultural products. Over the past 50 years, the rail network has contracted while tonnage has increased. Service, geographically, has been abandoned along short-haul routes and increased along major long-haul routes, resulting in a network that is more streamlined. The current rail network may be very vulnerable to disruptions, like the failure of a trestle. This paper proposes a framework to model rail network vulnerability and gives an application of this modeling framework in analyzing rail network vulnerability for the State of Washington. It concludes with a number of policy-related issues that need to be addressed in order to identify, plan, and mitigate the risks associated with the sudden loss of a bridge or trestle.
C1 [Peterson, Steven K.] Washington State Univ, Sch Econ Sci, Transportat Res Grp, Pullman, WA 99164 USA.
[Church, Richard L.] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
RP Peterson, SK (reprint author), Oak Ridge Natl Lab, Natl Transportat Res Ctr, Knoxville, TN USA.
EM petersonsk@ornl.gov; church@geog.ucsb.edu
OI Peterson, Steven/0000-0002-8767-2998
NR 29
TC 10
Z9 10
U1 0
U2 2
PU WILEY-BLACKWELL PUBLISHING, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0017-4815
J9 GROWTH CHANGE
JI Growth Change
PD DEC
PY 2008
VL 39
IS 4
BP 617
EP 641
DI 10.1111/j.1468-2257.2008.00449.x
PG 25
WC Planning & Development
SC Public Administration
GA 398WN
UT WOS:000262762300005
ER
PT J
AU Pagava, S
Rusetski, V
Robakidze, Z
Farfan, EB
Dunker, RE
Popp, JL
Avtandilashvili, M
Wells, DP
Donnelly, EH
AF Pagava, S.
Rusetski, V.
Robakidze, Z.
Farfan, E. B.
Dunker, R. E.
Popp, J. L.
Avtandilashvili, M.
Wells, D. P.
Donnelly, E. H.
TI INITIAL INVESTIGATION OF Rn-222 IN THE TBILISI URBAN ENVIRONMENT
SO HEALTH PHYSICS
LA English
DT Article
DE radon; dose; electrets; Rn-222
AB Georgia has geological formations with high uranium content, and several buildings are built with local materials. This can create potentially high radon exposures. Consequently, studies to mitigate these exposures have been started. This study presents a preliminary investigation of radon in Tbilisi, the capital of Georgia. An independent radiological monitoring program in Georgia has been initiated by the Radiocarbon and Low-Level Counting Section of I. Javakhishvili Tbilisi State University with the cooperation of the Environmental Monitoring Laboratory of the Physics/Health Physics Department at Idaho State University. At this initial stage the E-PERM systems and GammaTRACER were used for the measurement of gamma exposure and radon concentrations in air and water. Measurements in Sololaki, a densely populated historic district of Tbilisi, revealed indoor radon (Rn-222) concentrations of 1.5-2.5 times more than the U.S. Environmental Protection Agency action level of 148 Bq m(-3) (4 pCi L-1). Moreover, radon-in-air concentrations of 440 Bq m-3 and 3,500 Bq m(-3) were observed at surface borehole openings within the residential district. Measurements of water from various tap water supplies displayed radon concentrations of 3-5 Bq L-1 while radon concentrations in water from the hydrogeological and thermal water boreholes were 5-19 Bq L-1. In addition, the background gamma absorbed dose rate in air ranged of 70-115 nGy h(-1) at the radon test locations throughout the Tbilisi urban environment.
C1 [Farfan, E. B.] Savannah River Natl Lab, Aiken, SC 29808 USA.
[Pagava, S.; Rusetski, V.; Robakidze, Z.] I Javakhishvilli Tbilisi State Univ, Radiocarbon & Low Level Counting Sect, GE-0128 Tbilisi, Rep of Georgia.
[Dunker, R. E.; Popp, J. L.; Avtandilashvili, M.] Idaho State Univ, Dept Phys Hlth Phys, Pocatello, ID 83209 USA.
[Wells, D. P.] Idaho Accelerator Ctr, Pocatello, ID 83201 USA.
[Donnelly, E. H.] Ctr Dis Control & Prevent, Atlanta, GA 30341 USA.
RP Farfan, EB (reprint author), Savannah River Natl Lab, 773-42A Savannah River Site, Aiken, SC 29808 USA.
EM Eduardo.Farfan@srnl.doe.gov
NR 13
TC 0
Z9 0
U1 0
U2 5
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 DEC
PY 2008
VL 95
IS 6
BP 761
EP 765
DI 10.1097/01.HP.0000319909.18881.5e
PG 5
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 373QK
UT WOS:000260986800006
PM 19001903
ER
PT J
AU Waldauer, SA
Bakajin, O
Ball, T
Chen, Y
DeCamp, SJ
Kopka, M
Jager, M
Singh, VR
Wedemeyer, WJ
Weiss, S
Yao, S
Lapidus, LJ
AF Waldauer, Steven A.
Bakajin, Olgica
Ball, Terry
Chen, Yujie
DeCamp, Stephen J.
Kopka, Michaela
Jaeger, Marcus
Singh, Vijay R.
Wedemeyer, William J.
Weiss, Shimon
Yao, Shuhuai
Lapidus, Lisa J.
TI Ruggedness in the folding landscape of protein L
SO HFSP JOURNAL
LA English
DT Article
ID HYDROPHOBIC COLLAPSE; MICROFLUIDIC MIXER; KINETICS; TRANSITION;
DYNAMICS; DOMAIN; INTERMEDIATE; STABILITY; STATES; PROBE
AB By exploring the folding pathways of the B1 domain of protein L with a series of equilibrium and rapid kinetic experiments, we have found its unfolded state to be more complex than suggested by two-state folding models. Using an ultrarapid mixer to initiate protein folding within similar to 2-4 microseconds, we observe folding kinetics by intrinsic tryptophan fluorescence and fluorescence resonance energy transfer. We detect at least two processes faster than 100 mu s that would be hidden within the burst phase of a stopped-flow instrument measuring tryptophan fluorescence. Previously reported measurements of slow intramolecular diffusion are commensurate with the slower of the two observed fast phases. These results suggest that a multidimensional energy landscape is necessary to describe the folding of protein L, and that the dynamics of the unfolded state is dominated by multiple small energy barriers. [DOI: 10.2976/1.3013702]
C1 [Waldauer, Steven A.; Ball, Terry; Chen, Yujie; DeCamp, Stephen J.; Kopka, Michaela; Singh, Vijay R.; Wedemeyer, William J.; Lapidus, Lisa J.] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA.
[Ball, Terry; Wedemeyer, William J.] Michigan State Univ, Dept Biochem & Mol Biol, E Lansing, MI 48824 USA.
[Bakajin, Olgica; Yao, Shuhuai] Lawrence Livermore Natl Lab, Chem Mat Earth & Life Sci Directorate, Livermore, CA 94550 USA.
[Jaeger, Marcus; Weiss, Shimon] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA.
[Weiss, Shimon] Univ Calif Los Angeles, Dept Physiol, Los Angeles, CA 90095 USA.
[Weiss, Shimon] Calif Nanosyst Inst CNSI, Los Angeles, CA 90095 USA.
RP Lapidus, LJ (reprint author), Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA.
EM lapidus@msu.edu
RI Waldauer, Steven/D-1217-2010; Yao, Shuhuai/G-8672-2011; weiss,
shimon/B-4164-2009;
OI weiss, shimon/0000-0002-0720-5426; DeCamp, Stephen/0000-0001-7002-7370;
Yao, Shuhuai/0000-0001-7059-4092
FU NSF FIBR [0623664]; Burroughs Wellcome Fund; LDRD program
[AC52-07NA27344]
FX This work was partially supported by funding from NSF FIBR Grant
0623664. The research of Lisa Lapidus, Ph.D. is supported in part by a
Career Award at the Scientific Interface from the Burroughs Wellcome
Fund. Work at Lawrence Livermore National Laboratory was performed under
the auspices of the U. S. Department of Energy under Contract
DE-AC52-07NA27344 with funding from the LDRD program. This work was
partially supported by funding from NSF FIBR Grant 0623664 administered
by the Center for Biophotonics, an NSF Science and Technology Center,
managed by the University of California, Davis, under Cooperative
Agreement PHY 0120999. L.J.L., W.J.W., S. A. W., and O.B. designed the
experiments. S. A. W., S.J.D., V. R. S., Y.C., M. K., S.Y., and L.J.L.
took the data. S. A. W., S.Y., and O.B. designed and fabricated the
mixing chips. T. B., M.J., and M. K. mutated, expressed, and labeled the
proteins. L.J.L., S. A. W., and W.J.W analyzed the data and wrote the
paper.
NR 40
TC 23
Z9 24
U1 2
U2 10
PU HFSP PUBLISHING
PI STRASBOURG
PA 12 QUAI ST JEAN, STRASBOURG, 67000, FRANCE
SN 1955-2068
J9 HFSP J
JI HFSP J.
PD DEC
PY 2008
VL 2
IS 6
BP 388
EP 395
DI 10.2976/1.3013702
PG 8
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 384OU
UT WOS:000261754900012
PM 19436489
ER
PT J
AU Ghajar, CM
Bissell, MJ
AF Ghajar, Cyrus M.
Bissell, Mina J.
TI Extracellular matrix control of mammary gland morphogenesis and
tumorigenesis: insights from imaging
SO HISTOCHEMISTRY AND CELL BIOLOGY
LA English
DT Review
DE Extracellular matrix (ECM); Imaging; Microenvironment; Morphogenesis;
Tissue polarity; Tumorigenesis
ID BREAST EPITHELIAL-CELLS; CASEIN GENE-EXPRESSION; BRANCHING
MORPHOGENESIS; BASEMENT-MEMBRANE; TRANSGENIC MICE; GROWTH-FACTOR;
STEM-CELLS; KEY STAGES; IN-VIVO; TRANSCRIPTIONAL ENHANCER
AB The extracellular matrix (ECM), once thought to solely provide physical support to a tissue, is a key component of a cell's microenvironment responsible for directing cell fate and maintaining tissue specificity. It stands to reason, then, that changes in the ECM itself or in how signals from the ECM are presented to or interpreted by cells can disrupt tissue organization; the latter is a necessary step for malignant progression. In this review, we elaborate on this concept using the mammary gland as an example. We describe how the ECM directs mammary gland formation and function, and discuss how a cell's inability to interpret these signals-whether as a result of genetic insults or physicochemical alterations in the ECM-disorganizes the gland and promotes malignancy. By restoring context and forcing cells to properly interpret these native signals, aberrant behavior can be quelled and organization re-established. Traditional imaging approaches have been a key complement to the standard biochemical, molecular, and cell biology approaches used in these studies. Utilizing imaging modalities with enhanced spatial resolution in live tissues may uncover additional means by which the ECM regulates tissue structure, on different length scales, through its pericellular organization (short-scale) and by biasing morphogenic and morphostatic gradients (long-scale).
C1 [Ghajar, Cyrus M.; Bissell, Mina J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
RP Bissell, MJ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, 1 Cyclotron Rd,Mailstop 977 R225A, Berkeley, CA 94720 USA.
EM cmghajar@lbl.gov; MJBissell@lbl.gov
FU OBER Office of Biological and Environmental Research; National Cancer
Institute; OBER, Department of Energy; Lawrence Berkeley National
Laboratory
FX We apologize to those whose work could not be cited due to space
limitations. We have cited reviews where possible. We would like to
thank members of the Bissell Laboratory, specially Hidetoshi Mori, Jamie
Inman, Mark LaBarge, and Virginia Spencer for valuable discussions. The
work from the authors' laboratory is supported by grants from the OBER
Office of Biological and Environmental Research; awards from the
National Cancer Institute; Innovator awards from the DOD breast cancer
program and a Distinguished Fellowship Award from the OBER, Department
of Energy' (M.J.B.). C.M.G. is supported by a Glenn T. Seaborg
Postdoctoral Fellowship from Lawrence Berkeley National Laboratory.
NR 122
TC 58
Z9 58
U1 1
U2 11
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0948-6143
J9 HISTOCHEM CELL BIOL
JI Histochem. Cell Biol.
PD DEC
PY 2008
VL 130
IS 6
BP 1105
EP 1118
DI 10.1007/s00418-008-0537-1
PG 14
WC Cell Biology; Microscopy
SC Cell Biology; Microscopy
GA 387MN
UT WOS:000261956400005
PM 19009245
ER
PT J
AU Thomas, AW
Afnan, IR
Tandy, PC
AF Thomas, Anthony W.
Afnan, Iraj R.
Tandy, Peter C.
TI Ian Ellery McCarthy 1930-2005
SO HISTORICAL RECORDS OF AUSTRALIAN SCIENCE
LA English
DT Biographical-Item
AB Ian McCarthy was one of Australia's outstanding theoretical physicists. He was born in country South Australia and, after a PhD at the University of Adelaide, and periods of work in the UK and USA, he returned to South Australia where for several decades he led an outstanding research program at Flinders University. Ian's career had two major stages. In the first, he made major contributions to nuclear reaction theory, including very important insights into the physical consequences of the optical model and state-of-the-art calculations of proton knock-out from nuclei. In the second phase, he imported the concept of the knock-out reaction to atomic, molecular and solid state physics. Using the (e,2e) reaction, for which he and his colleagues developed the theoretical framework, his group made major contributions in these areas.
C1 [Thomas, Anthony W.] Jefferson Lab, Newport News, VA 23606 USA.
[Thomas, Anthony W.] Coll William & Mary, Williamsburg, VA 23187 USA.
[Afnan, Iraj R.] Flinders Univ S Australia, Sch Chem Phys & Earth Sci, Adelaide, SA 5001, Australia.
[Tandy, Peter C.] Kent State Univ, Dept Phys, Kent, OH 44242 USA.
RP Thomas, AW (reprint author), Jefferson Lab, 12000 Jefferson Ave, Newport News, VA 23606 USA.
EM awthomas@jlab.org
OI Thomas, Anthony/0000-0003-0026-499X
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CSIRO PUBLISHING
PI COLLINGWOOD
PA 150 OXFORD ST, PO BOX 1139, COLLINGWOOD, VICTORIA 3066, AUSTRALIA
SN 0727-3061
J9 HIST REC AUST SCI
JI Hist. Rec. Aust. Sci.
PD DEC
PY 2008
VL 19
IS 2
BP 161
EP 189
DI 10.1071/HR08010
PG 29
WC History & Philosophy Of Science
SC History & Philosophy of Science
GA 387YO
UT WOS:000261987700003
ER
PT J
AU Lu, GP
Sonnenthal, EL
Bodvarsson, GS
AF Lu, Guoping
Sonnenthal, Eric L.
Bodvarsson, Gudmundur S.
TI Multiple component end- member mixing model of dilution: hydrochemical
effects of construction water at Yucca Mountain, Nevada, USA
SO HYDROGEOLOGY JOURNAL
LA English
DT Article
DE Hydrochemistry; Linear mixing model; Dilution; Leaching; USA
AB The standard dual-component and two-member linear mixing model is often used to quantify water mixing of different sources. However, it is no longer applicable whenever actual mixture concentrations are not exactly known because of dilution. For example, low-water-content (low-porosity) rock samples are leached for pore-water chemical compositions, which therefore are diluted in the leachates. A multicomponent, two-member mixing model of dilution has been developed to quantify mixing of water sources and multiple chemical components experiencing dilution in leaching. This extended mixing model was used to quantify fracture-matrix interaction in construction-water migration tests along the Exploratory Studies Facility (ESF) tunnel at Yucca Mountain, Nevada, USA. The model effectively recovers the spatial distribution of water and chemical compositions released from the construction water, and provides invaluable data on the matrix fracture interaction. The methodology and formulations described here are applicable to many sorts of mixing-dilution problems, including dilution in petroleum reservoirs, hydrospheres, chemical constituents in rocks and minerals, monitoring of drilling fluids, and leaching, as well as to environmental science studies.
C1 [Lu, Guoping; Sonnenthal, Eric L.; Bodvarsson, Gudmundur S.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Lu, GP (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM guopinglu@yahoo.com
RI Sonnenthal, Eric/A-4336-2009
FU Office of Civilian Radioactive Waste Management, of the US Department of
Energy [DE-AC02-05CH11231]
FX The authors would like to acknowledge the help of June Fabryka-Martin at
Los Alamos National Laboratory, the internal review by Guoxiang Zhang
and Michael Singleton at Lawrence Berkeley National Laboratory, and the
technical editorial work by Daniel Hawkes. This work was supported by
the Director, Office of Civilian Radioactive Waste Management, of the US
Department of Energy under contract no. DE-AC02-05CH11231.
NR 11
TC 5
Z9 5
U1 0
U2 3
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1431-2174
J9 HYDROGEOL J
JI Hydrogeol. J.
PD DEC
PY 2008
VL 16
IS 8
BP 1517
EP 1526
DI 10.1007/s10040-008-0322-1
PG 10
WC Geosciences, Multidisciplinary; Water Resources
SC Geology; Water Resources
GA 376ID
UT WOS:000261176400007
ER
PT J
AU Guo, Y
Qu, ZH
Braiman, Y
Zhang, ZY
Barhen, J
AF Guo, Yi
Qu, Zhihua
Braiman, Yehuda
Zhang, Zhenyu
Barhen, Jacob
TI Nanotribology and Nanoscale Friction SMOOTH SLIDING THROUGH FEEDBACK
CONTROL
SO IEEE CONTROL SYSTEMS MAGAZINE
LA English
DT Article
ID STABILIZATION; FORCES
C1 [Guo, Yi] Stevens Inst Technol, Dept Elect & Comp Engn, Hoboken, NJ 07030 USA.
[Qu, Zhihua] Univ Cent Florida, Sch Elect Engn & Comp Sci, Orlando, FL 32816 USA.
[Zhang, Zhenyu] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN USA.
[Zhang, Zhenyu] Univ Tennessee, Knoxville, TN 37996 USA.
[Barhen, Jacob] Oak Ridge Natl Lab, Ctr Engn Sci Adv Res, Oak Ridge, TN 37831 USA.
[Barhen, Jacob] CALTECH, JPL, Neural Computat & Nonlinear Sci Grp, Pasadena, CA 91125 USA.
RP Guo, Y (reprint author), Stevens Inst Technol, Dept Elect & Comp Engn, Hoboken, NJ 07030 USA.
EM yguo1@stevens.edu
FU U.S. Department of Energy [FG02-03ER46091]; Division of Materials
Sciences and Engineering; Office of Basic Energy Sciences
[AC05-00OR22725]; Oak Ridge National Laboratory; Office of Naval
Research
FX Yehuda Braiman, Zhenyu Zhang, and Jacob Barhen would like to acknowledge
the support by the U.S. Department of Energy, Grant DE-FG02-03ER46091
(Zhenyu Zhang), and the Division of Materials Sciences and Engineering,
Office of Basic Energy Sciences, under contract DE-AC05-00OR22725 with
Oak Ridge National Laboratory, managed and operated by UT-Battelle, LLC.
Yehuda Braiman would also like to acknowledge the support of the Office
of Naval Research.
NR 30
TC 9
Z9 9
U1 2
U2 7
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1066-033X
J9 IEEE CONTR SYST MAG
JI IEEE Control Syst. Mag.
PD DEC
PY 2008
VL 28
IS 6
BP 92
EP 100
DI 10.1109/MCS.2008.929420
PG 9
WC Automation & Control Systems
SC Automation & Control Systems
GA 378GE
UT WOS:000261308400009
ER
PT J
AU Venkataraman, K
Hellstrom, EE
Paranthaman, M
AF Venkataraman, Kartik
Hellstrom, Eric E.
Paranthaman, Mariappan
TI Growth of Lanthanum Manganate Buffer Layers for Coated Conductors via a
Metal-Organic Decomposition Process (vol 15, pg 3005, 2005)
SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
LA English
DT Correction
ID LAMNO3
AB In our prior paper, we reported forming (110)-oriented LaMnO(3) on a biaxially textured Ni-3at% W substrate.. Chemical analysis of these films subsequent to publishing the paper showed only La and O-there wits no Mn present in the film. The film was actually (400)-oriented La(2)O(3) with the cubic bixbyite structure. Subsequent studies also showed that MnO film is not stable on Ni and Ni-W substrate surfaces at 1100 degrees C and P(O2) = 10(-16) atm where bulk MnO is stable.
C1 [Venkataraman, Kartik] Lam Res Corp, Fremont, CA 94538 USA.
[Hellstrom, Eric E.] Florida State Univ, Ctr Appl Superconduct, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
[Hellstrom, Eric E.] Florida State Univ, Dept Mech Engn, Tallahassee, FL 32310 USA.
[Paranthaman, Mariappan] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Venkataraman, K (reprint author), Lam Res Corp, Fremont, CA 94538 USA.
EM hellstrom@asc.magnet.fsu.edu
RI Paranthaman, Mariappan/N-3866-2015
OI Paranthaman, Mariappan/0000-0003-3009-8531
NR 11
TC 0
Z9 0
U1 0
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1051-8223
J9 IEEE T APPL SUPERCON
JI IEEE Trans. Appl. Supercond.
PD DEC
PY 2008
VL 18
IS 4
BP 1801
EP 1803
DI 10.1109/TASC.2008.2007235
PG 3
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA 381NS
UT WOS:000261543800008
ER
PT J
AU Sun, JQ
Peterson, GD
Storaasli, OO
AF Sun, Junqing
Peterson, Gregory D.
Storaasli, Olaf O.
TI High-Performance Mixed-Precision Linear Solver for FPGAs
SO IEEE TRANSACTIONS ON COMPUTERS
LA English
DT Article
DE Reconfigurable computing; supercomputing; floating point; data formats;
iterative refinement
ID SYSTEMS
AB Compared to higher precision data formats, lower precision data formats result in higher performance for computationally intensive applications on FPGAs because of their lower resource cost, reduced memory bandwidth requirements, and higher circuit frequency. On the other hand, scientific computations usually demand highly accurate solutions. This paper seeks to utilize lower precision data formats whenever possible for higher performance without losing the accuracy of higher precision data formats by using mixed-precision algorithms and architectures. First, we analyze the floating-point performance of different data formats on FPGAs. Second, we introduce mixed-precision iterative refinement algorithms for linear solvers and give an error analysis. Finally, we propose an innovative architecture for a mixed-precision direct solver for reconfigurable computing. Our results show that our mixed-precision algorithm and architecture significantly improve the performance of linear solvers on FPGAs.
C1 [Sun, Junqing; Peterson, Gregory D.] Univ Tennessee, Dept Elect Engn & Comp Sci, Knoxville, TN 37996 USA.
[Storaasli, Olaf O.] Oak Ridge Natl Lab, Div Math & Comp Sci, Future Technol Grp, Oak Ridge, TN 37831 USA.
[Storaasli, Olaf O.] Univ Tennessee, Joint Inst Comp Sci, Knoxville, TN 37996 USA.
RP Sun, JQ (reprint author), Univ Tennessee, Dept Elect Engn & Comp Sci, Knoxville, TN 37996 USA.
EM jsun5@utk.edu; gdp@utk.edu; Olaf@ornl.gov
FU University of Tennessee Science Alliance; Oak Ridge National Laboratory
FX This project was supported by the University of Tennessee Science
Alliance and the Oak Ridge National Laboratory Director's Research and
Development program. The authors also would like to thank Jack Dongarra
and Stanimire Tomov of the University of Tennessee for useful
discussions on mixed-precision algorithms and the anonymous reviewers
for their comments.
NR 28
TC 21
Z9 22
U1 0
U2 2
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 0018-9340
J9 IEEE T COMPUT
JI IEEE Trans. Comput.
PD DEC
PY 2008
VL 57
IS 12
BP 1614
EP 1623
DI 10.1109/TC.2008.89
PG 10
WC Computer Science, Hardware & Architecture; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA 363HV
UT WOS:000260259300003
ER
PT J
AU Blacksberg, J
Nikzad, S
Hoenk, ME
Holland, SE
Kolbe, WF
AF Blacksberg, Jordana
Nikzad, Shouleh
Hoenk, Michael E.
Holland, Stephen E.
Kolbe, William F.
TI Near-100% Quantum Efficiency of Delta Doped Large-Format UV-NIR Silicon
Imagers
SO IEEE TRANSACTIONS ON ELECTRON DEVICES
LA English
DT Article
DE Back illuminated; charge-coupled device (CCD); delta doping; fully
depleted; high-purity silicon
ID GROWTH; FILMS
AB We have demonstrated a back surface process for back-illuminated high-purity p-channel charge-coupled devices (CCDs), enabling broadband coverage from the ultraviolet to near infrared (NIR). The process consists of the formation of a delta layer followed by a double layer antireflection (AR) coating. The process is per-formed below 450 degrees C and is applied to fully fabricated CCDs with aluminum metallization. The delta doping process was demonstrated on 1 k x 1 k and 2 k x 4 k CCDs, which were found to exhibit low dark current and near reflection-limited quantum efficiency. Two broadband AR coatings were developed to cover the UV-visible and visible-NIR bands. These coatings consist of a double layer of Si(x)N(y) and SiO(x) deposited by plasma enhanced chemical vapor deposition onto the back surface of a delta doped CCD. The thicknesses of the coating layers are adjusted for the desired bandpass.
C1 [Blacksberg, Jordana; Nikzad, Shouleh; Hoenk, Michael E.] NASA, Jet Prop Lab, CALTECH, Pasadena, CA 91109 USA.
[Holland, Stephen E.; Kolbe, William F.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Blacksberg, J (reprint author), NASA, Jet Prop Lab, CALTECH, Pasadena, CA 91109 USA.
EM jordana.blacksberg@jpl.nasa.gov; shouleh.nikzad@jpl.nasa.gov;
seholland@lbl.gov
RI Holland, Stephen/H-7890-2013
FU JPL's Research and Technology Development (R and TD); Director's
Research and Development Fund (DRDF); Director, Office of Science;
Office of Basic Energy Sciences; U.S. Department of Energy
[DE-AC02-05CH11231]
FX This work was supported in part by the JPL's Research and Technology
Development (R and TD) and the Director's Research and Development Fund
(DRDF) programs, in which research at the Jet Propulsion Laboratory,
California Institute of Technology, was carried out under a contract
with the National Aeronautics and Space Administration, and in part by
the Director, Office of Science, Office of Basic Energy Sciences, U.S.
Department of Energy under Contract DE-AC02-05CH11231. The review of
this paper was arranged by Editor
NR 12
TC 4
Z9 4
U1 0
U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9383
J9 IEEE T ELECTRON DEV
JI IEEE Trans. Electron Devices
PD DEC
PY 2008
VL 55
IS 12
BP 3402
EP 3406
DI 10.1109/TED.2008.2006779
PG 5
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA 380LJ
UT WOS:000261466900010
ER
PT J
AU Paulsen, JL
Franck, J
Demas, V
Bouchard, LS
AF Paulsen, Jeffrey L.
Franck, John
Demas, Vasiliki
Bouchard, Louis-S.
TI Least Squares Magnetic-Field Optimization for Portable Nuclear Magnetic
Resonance Magnet Design
SO IEEE TRANSACTIONS ON MAGNETICS
LA English
DT Article
DE Least-squares optimization; magnetic devices; magnetic resonance;
magnetostatics; nuclear magnetic resonance
ID EX-SITU NMR; SINGLE-SIDED SENSOR; UNILATERAL NMR; MOBILE NMR;
SPECTROSCOPY; MOUSE; DISTRIBUTIONS
AB Single-sided and mobile nuclear magnetic resonance (NMR) sensors have the advantages of portability, low cost, and low power consumption compared to conventional high-field NMR and magnetic resonance imaging (MRI) systems. We present fast, flexible, and easy-to-implement target field algorithms for mobile NMR and MRI magnet design. The optimization finds a global optimum in a cost function that minimizes the error in the target magnetic field in the sense of least squares. When the technique is tested on a ring array of permanent-magnet elements, the solution matches the classical dipole Halbach solution. For a single-sided handheld NMR sensor, the algorithm yields a 640 G field homogeneous to 16 100 ppm across a 1.9 cm(3) volume located 1.5 cm above the top of the magnets and homogeneous to 32 200 ppm over a 7.6 cm(3) volume. This regime is adequate for MRI applications. We demonstrate that the homogeneous region can be continuously moved away from the sensor by rotating magnet rod elements, opening the way for NMR sensors with adjustable "sensitive volumes."
C1 [Bouchard, Louis-S.] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA.
[Paulsen, Jeffrey L.] Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA.
[Paulsen, Jeffrey L.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Franck, John] Schlumberger Doll Res Ctr, Cambridge, MA 02139 USA.
[Demas, Vasiliki] T2 Biosyst, Cambridge, MA 02141 USA.
RP Bouchard, LS (reprint author), Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA.
EM bouchard@chem.ucla.edu
OI Paulsen, Jeffrey/0000-0003-1031-4858; Franck, John/0000-0002-5432-4823
FU 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 DE-AC02-05CH11231. The
authors would like to thank Prof. A. Pines for his support, stimulating
discussions, and advice, and Prof. B. Blumich for stimulating
discussions and advice.
NR 36
TC 6
Z9 6
U1 2
U2 12
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9464
J9 IEEE T MAGN
JI IEEE Trans. Magn.
PD DEC
PY 2008
VL 44
IS 12
BP 4582
EP 4590
DI 10.1109/TMAG.2008.2001697
PG 9
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA 395XM
UT WOS:000262556800004
ER
PT J
AU Bae, JU
Lin, TY
Yoon, Y
Kim, SJ
Bird, JP
Imre, A
Porod, W
Reno, JL
AF Bae, J. -U.
Lin, T. -Y.
Yoon, Y.
Kim, S. J.
Bird, J. P.
Imre, A.
Porod, W.
Reno, J. L.
TI Characterization of Nanomagnet Fringing Fields in Hybrid
Semiconductor/Ferromagnetic Devices
SO IEEE TRANSACTIONS ON MAGNETICS
LA English
DT Article
DE Ferromagnet; hysteresis; magneto-electronics; magneto-resistance
ID 2-DIMENSIONAL ELECTRON-GAS; HALL-EFFECT DEVICE; GAAS; MAGNETORESISTANCE;
TRANSPORT
AB We describe the fabrication of a hybrid nanomagneto-electronic device, consisting of a GaAs/AlGaAs quantum wire that is bridged by a ferromagnetic gate, and study the influence of the nanomagnet fringing fields on the quantum-wire magneto-resistance. The nonplanar gate shows clear single-domain structure in magnetic-force microscopy, and a simple magnetization behavior in an external magnetic field. This behavior is reflected as a hysteretic variation of the quantum-wire magneto-resistance, whose magnitude is found to be consistent with theoretical predictions for ballistic electron transport through a spatially varying magnetic field.
C1 [Bae, J. -U.; Lin, T. -Y.; Yoon, Y.; Kim, S. J.; Bird, J. P.] SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14216 USA.
[Imre, A.; Porod, W.] Univ Notre Dame, Dept Elect Engn, Notre Dame, IN 46556 USA.
[Reno, J. L.] Sandia Natl Labs, Ctr Integrated Nanotechnol, Albuquerque, NM 87185 USA.
RP Bae, JU (reprint author), SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14216 USA.
EM jbae4@buffalo.edu
RI Bird, Jonathan/G-4068-2010; Joshi-Imre, Alexandra/A-2912-2010
OI Bird, Jonathan/0000-0002-6966-9007; Joshi-Imre,
Alexandra/0000-0002-4271-1623
FU Department of Energy; U. S. Department of Energy [DE-AC04-94AL85000]
FX This work was supported by the Department of Energy and was performed,
in part, at the Center for Integrated Nanotechnologies, a U.S. DOE,
Office of Basic Energy Sciences, Nanoscale Science Research Center.
Sandia National Laboratories 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 22
TC 2
Z9 2
U1 0
U2 6
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9464
J9 IEEE T MAGN
JI IEEE Trans. Magn.
PD DEC
PY 2008
VL 44
IS 12
BP 4706
EP 4710
DI 10.1109/TMAG.2008.2002924
PG 5
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA 395XM
UT WOS:000262556800019
ER
PT J
AU Maltz, JS
Gangadharan, B
Bose, S
Hristov, DH
Faddegon, BA
Paidi, A
Bani-Hashemi, AR
AF Maltz, Jonathan S.
Gangadharan, Bijumon
Bose, Supratik
Hristov, Dimitre H.
Faddegon, Bruce A.
Paidi, Ajay
Bani-Hashemi, Ali R.
TI Algorithm for X-ray Scatter, Beam-Hardening, and Beam Profile Correction
in Diagnostic (Kilovoltage) and Treatment (Megavoltage) Cone Beam CT
SO IEEE TRANSACTIONS ON MEDICAL IMAGING
LA English
DT Article
DE Biomedical applications of radiation; Monte Carlo (MC) methods;
radiation hardening; X-ray detectors; X-ray imaging; X-ray scattering;
X-ray tomography
ID CONVOLUTION; IMAGES; TARGET
AB Quantitative reconstruction of cone beam X-ray computed tomography (CT) datasets requires accurate modeling of scatter, beam-hardening, beam profile, and detector response. Typically, commercial imaging systems use fast empirical corrections that are designed to reduce visible artifacts due to incomplete modeling of the image formation process. In contrast, Monte Carlo (MC) methods are much more accurate but are relatively slow. Scatter kernel superposition (SKS) methods offer a balance between accuracy and computational practicality. We show how a single SKS algorithm can be employed to correct both kilovoltage (kV) energy (diagnostic) and megavoltage (MV) energy (treatment) X-ray images. Using MC models of kV and MV imaging systems, we map intensities recorded on an amorphous silicon flat panel detector to water-equivalent thicknesses (WETs). Scatter-grams are derived from acquired projection images using scatter kernels indexed by the local WET values and are then iteratively refined using a scatter magnitude bounding scheme that allows the algorithm to accommodate the very high scatter-to-primary ratios encountered in kV imaging. The algorithm recovers radiological thicknesses to within 9% of the true value at both kV and megavolt energies. Nonuniformity in CT reconstructions of homogeneous phantoms is reduced by an average of 76% over a wide range of beam energies and phantom geometries.
C1 [Maltz, Jonathan S.; Gangadharan, Bijumon; Bose, Supratik; Paidi, Ajay; Bani-Hashemi, Ali R.] Siemens Med Solut USA Inc, Oncol Care Syst Grp, Concord, CA 94520 USA.
[Maltz, Jonathan S.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Dept Med Imaging Technol, Berkeley, CA 94720 USA.
[Hristov, Dimitre H.] Stanford Univ, Dept Radiat Oncol, Stanford, CA 94305 USA.
[Faddegon, Bruce A.] Univ Calif San Francisco, Dept Radiat Oncol, San Francisco, CA 94143 USA.
RP Maltz, JS (reprint author), Siemens Med Solut USA Inc, Oncol Care Syst Grp, Concord, CA 94520 USA.
FU Siemens Medical Solutions (USA) Inc.
FX This work was supported by Siemens Medical Solutions (USA) Inc.
NR 23
TC 47
Z9 48
U1 1
U2 10
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0278-0062
J9 IEEE T MED IMAGING
JI IEEE Trans. Med. Imaging
PD DEC
PY 2008
VL 27
IS 12
BP 1791
EP 1810
DI 10.1109/TMI.2008.928922
PG 20
WC Computer Science, Interdisciplinary Applications; Engineering,
Biomedical; Engineering, Electrical & Electronic; Imaging Science &
Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging
SC Computer Science; Engineering; Imaging Science & Photographic
Technology; Radiology, Nuclear Medicine & Medical Imaging
GA 378ZX
UT WOS:000261364900011
PM 19033095
ER
PT J
AU Tonguz, OK
Yanmaz, E
AF Tonguz, Ozan K.
Yanmaz, Evsen
TI The Mathematical Theory of Dynamic Load Balancing in Cellular Networks
SO IEEE TRANSACTIONS ON MOBILE COMPUTING
LA English
DT Article
DE Dynamic load balancing; cellular networks; resource allocation; hot
spots
ID MOBILE COMMUNICATION-SYSTEMS; HYBRID CHANNEL ASSIGNMENT;
QUEUING-NETWORKS; TELEPHONE SYSTEM; DIRECTED RETRY; PERFORMANCE;
BLOCKING; ALLOCATION; ALGORITHMS; CAPACITY
AB While many interesting dynamic load-balancing schemes have been proposed for efficient use of limited bandwidth and to increase the capacity of congested or hot spots (or cells) in wireless networks, to date, a comprehensive mathematical theory or framework that encompasses all of these schemes does not exist. In this paper, we provide the mathematical theory of dynamic load balancing in cellular networks, which leads to closed-form performance expressions for evaluating the performance of some of the most important dynamic load-balancing strategies proposed in the literature. To the best of our knowledge, this is the first generic theoretical framework that can be used to evaluate the performance of many different dynamic load-balancing schemes with simple closed-form results. The accuracy of the results predicted by the theoretical framework was checked against the simulation results provided in the literature for well-known schemes and an excellent agreement was observed
C1 [Tonguz, Ozan K.] Carnegie Mellon Univ, Dept Elect & Comp Engn, Pittsburgh, PA 15213 USA.
[Yanmaz, Evsen] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Tonguz, OK (reprint author), Carnegie Mellon Univ, Dept Elect & Comp Engn, Hamerschlag Hall,5000 Forbes Ave, Pittsburgh, PA 15213 USA.
EM tonguz@ece.cmu.edu; eyanmaz@alumni.cmu.edu
NR 37
TC 33
Z9 35
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 1536-1233
EI 1558-0660
J9 IEEE T MOBILE COMPUT
JI IEEE. Trans. Mob. Comput.
PD DEC
PY 2008
VL 7
IS 12
BP 1504
EP 1518
DI 10.1109/TMC.2008.66
PG 15
WC Computer Science, Information Systems; Telecommunications
SC Computer Science; Telecommunications
GA 361MB
UT WOS:000260130700008
ER
PT J
AU Dodd, PE
AF Dodd, Paul E.
TI Conference Comments by the General Chairman
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Editorial Material
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Dodd, PE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 0
TC 0
Z9 0
U1 0
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 2807
EP 2809
DI 10.1109/TNS.2008.2009683
PG 3
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400001
ER
PT J
AU Schwank, J
Buchner, S
Marshall, P
Duzellier, S
Brown, D
Poivey, C
Pease, R
AF Schwank, Jim
Buchner, Steve
Marshall, Paul
Duzellier, Sophie
Brown, Dennis
Poivey, Christian
Pease, Ron
TI 2008 Special NSREC Issue of the IEEE TRANSACTIONS ON NUCLEAR SCIENCE
Comments by the Editors
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Editorial Material
C1 [Schwank, Jim] Sandia Natl Labs, Livermore, CA 94550 USA.
[Buchner, Steve] NASA, GSFC Perot Syst, Washington, DC USA.
[Poivey, Christian] ESA, ESTEC, F-75738 Paris 15, France.
RP Schwank, J (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 0
TC 0
Z9 0
U1 1
U2 6
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 2810
EP 2810
DI 10.1109/TNS.2008.2009685
PG 1
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400002
ER
PT J
AU Cavrois, VF
Pouget, V
McMorrow, D
Schwank, JR
Fel, N
Essely, F
Flores, RS
Palliet, P
Gaillardin, M
Kobayashi, D
Melinger, JS
Duhamel, O
Dodd, PE
Shaneyfelt, MR
AF Cavrois, V. Ferlet
Pouget, V.
McMorrow, D.
Schwank, J. R.
Fel, N.
Essely, F.
Flores, R. S.
Palliet, P.
Gaillardin, M.
Kobayashi, D.
Melinger, J. S.
Duhamel, O.
Dodd, P. E.
Shaneyfelt, M. R.
TI Investigation of the Propagation Induced Pulse Broadening (PIPB) Effect
on Single Event Transients in SOI and Bulk Inverter Chains
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Chains of inverters; heavy ions; propagation induced pulse broadening;
pulsed laser; single event transients
ID SILICON-ON-INSULATOR; SOFT ERROR RATE; SET CHARACTERIZATION; CMOS
TECHNOLOGIES; HEAVY-ION; LASER; WIDTHS; TRANSISTORS; DEPENDENCE;
LIFETIME
AB The propagation of single event transients (SET) is measured and modeled in SOI and bulk inverter chains. The propagation-induced pulse broadening (PIPB) effect is shown to determine the SET pulse width measured at the output of long chains of inverters after irradiation. Initially, narrow transients, less than 200 ps at the struck inverter, are progressively broadened into the nanosecond range. PIPB is induced by dynamic floating body effects (also called history effects) in SOI and bulk transistors, which depend on the bias state of the transistors before irradiation. Implications for SET hardness assurance, circuit modelling and hardening are discussed. Floating body and PIPB effects are usually not taken into account in circuit models, which can lead to large underestimation of SET sensitivity when using simulation techniques like fault injection in complex circuits.
C1 [Cavrois, V. Ferlet; Fel, N.; Palliet, P.; Gaillardin, M.; Dodd, P. E.] DIF, DAM, CEA, Commissariat Energie Atom, F-91297 Arpajon, France.
[Pouget, V.; Essely, F.] Univ Bordeaux 1, IMS Lab, CNRS, UMR 5218, F-33405 Talence, France.
[McMorrow, D.; Melinger, J. S.] USN, Res Lab, Washington, DC 20375 USA.
[Schwank, J. R.; Flores, R. S.; Dodd, P. E.; Shaneyfelt, M. R.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Kobayashi, D.] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Kanagawa 2298510, Japan.
RP Cavrois, VF (reprint author), DIF, DAM, CEA, Commissariat Energie Atom, F-91297 Arpajon, France.
FU French Ministry of Defence (MOD/DGA); Defense Threat Reduction Agency;
U. S. Department of Energy; [DE-AC04-94AL85000]
FX The part of the work performed at the Commissariat a l'Energie Atoinique
(CEA/DIF) was supported by the French Ministry of Defence (MOD/DGA). The
part of this work performed at the Naval Research Laboratory and a part
of the work performed at Sandia National Laboratories was supported by
the Defense Threat Reduction Agency. Part of the work performed at
Sandia National Laboratories was also supported by the U. S. Department
of Energy. Sandia is a multiprogram laboratory operated by Sandia
Corporation, a Lockheed Martin Company, for the U. S. Department of
Energy's National Nuclear Security Administration under Contract
DE-AC04-94AL85000.
NR 37
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U1 0
U2 9
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 2842
EP 2853
DI 10.1109/TNS.2008.2007724
PG 12
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400004
ER
PT J
AU Cester, A
Wrachien, N
Schwank, JR
Vizkelethy, G
Portoghese, R
Gerardi, C
AF Cester, Andrea
Wrachien, Nicola
Schwank, James R.
Vizkelethy, Gyorgy
Portoghese, Rosario
Gerardi, Cosimo
TI Modeling of Heavy Ion Induced Charge Loss Mechanisms in Nanocrystal
Memory Cells
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE CMOS memory integrated circuits; flash memories; heavy ion irradiation;
radiation effects; semiconductor device reliability; semiconductor
memories
ID FLOATING-GATE MEMORIES; FLASH MEMORY; DATA RETENTION; ARRAYS;
RELIABILITY; SIMULATION; PERFORMANCE
AB We present the first charge loss model of heavy ion induced radiation damage on nanocrystal memory cells. The model takes into account the nanocrystal distribution non uniformity and the effect of different programming techniques, which may produce non uniform charging of the nanocrystals. The model has been validated with a focused microbeam test. It provides an estimation of both the ion track size and the average number of ion hits required for achieving a given charge loss. In our irradiation experiments we estimated an ion track size (diameter) of 85 nm for 50-MeV Cu ions. This model confirms also the good robustness of nanocrystal memories against heavy ion irradiation and their much stronger tolerance than the conventional floating gate based memories.
C1 [Cester, Andrea; Wrachien, Nicola] Univ Padua, Dipartimento Ingn Informaz, I-35131 Padua, Italy.
[Schwank, James R.; Vizkelethy, Gyorgy] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Portoghese, Rosario; Gerardi, Cosimo] Zona Ind, STMicroelect M6, I-95121 Catania, Italy.
RP Cester, A (reprint author), Univ Padua, Dipartimento Ingn Informaz, I-35131 Padua, Italy.
EM an-drea.cester@dei.unipd.it; nicola.wrachieji@dei.unipd.it;
schwankjr@sandia.gov; gvizkel@sandia.gov;
rosario.portoghese@numonyx.com; cosimo.gerardi@numonyx.com
RI Cester, Andrea/H-1683-2015
OI Cester, Andrea/0000-0001-6583-1735
FU Defense Threat Reduction Agency [05-4101I]; U.S. Department of Energy;
[DE-AC04-94AL85000]
FX The Sandia portion of this work was supported by the Defense Threat
Reduction Agency under DTRA IACRO #05-4101I and the U.S. Department of
Energy. Sandia is a multiprograin 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 30
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U1 0
U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 2895
EP 2903
DI 10.1109/TNS.2008.2006051
PG 9
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400010
ER
PT J
AU Cellere, G
Paccagnella, A
Visconti, A
Beltrami, S
Schwank, J
Shaneyfelt, A
Lambert, D
Paillet, P
Ferlet-Cavrois, V
Baggio, J
Harboe-Sorensen, R
Blackmore, E
Virtanen, A
Fuochi, P
AF Cellere, G.
Paccagnella, A.
Visconti, A.
Beltrami, S.
Schwank, J.
Shaneyfelt, A.
Lambert, D.
Paillet, P.
Ferlet-Cavrois, V.
Baggio, J.
Harboe-Sorensen, R.
Blackmore, E.
Virtanen, A.
Fuochi, P.
TI Direct Evidence of Secondary Recoiled Nuclei From High Energy Protons
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Floating gate memories; high energy protons; single event effects; space
radiation
ID SINGLE-EVENT UPSET; FLOATING-GATE MEMORIES; MULTIPLE-BIT UPSET;
HEAVY-ION ENERGY; FLASH MEMORIES; CHARGE LOSS; CELLS; IMPACT; SIO2; SRAM
AB The production of secondary recoiled particles from interactions between high energy protons and microelectronics devices was investigated. By using NAND Flash memories, we were able to directly obtain analog information on recoil characteristics. While our results qualitatively confirm the role of nuclear reactions, in particular of those with tungsten, a quantitative model based on Monte Carlo and device-level simulations cannot describe the observed results in terms of recoils from proton-W reactions.
C1 [Cellere, G.; Paccagnella, A.] Univ Padua, Dipartimento Ingn Informaz, I-35100 Padua, Italy.
[Cellere, G.; Paccagnella, A.] Ist Nazl Fis Nucl, Sez Padova, I-35100 Padua, Italy.
[Visconti, A.; Beltrami, S.] Numonyx, R&D Technol Dev, I-20041 Agrate Brianza, MI, Italy.
[Schwank, J.; Shaneyfelt, A.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Lambert, D.] EADS Nucletudes, F-91944 Courtaboeuf, France.
[Paillet, P.; Ferlet-Cavrois, V.; Baggio, J.] CEA, DIF, F-91680 Bruyeres Le Chatel, France.
[Harboe-Sorensen, R.] European Space Agcy, ESTEC, NL-2200 AG Noordwijk, Netherlands.
[Blackmore, E.] TRIUMF, Vancouver, BC V6T 2A3, Canada.
[Virtanen, A.] Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
[Fuochi, P.] CNR, ISOF, I-40129 Bologna, Italy.
RP Cellere, G (reprint author), Univ Padua, Dipartimento Ingn Informaz, I-35100 Padua, Italy.
EM giorgio.cellere@ieee.org; paccag@dei.unipd.it;
angelo.visconti@nu-monyx.com; silvia.beltrami@numonyx.com;
schwanjr@sandia.gov; dlambert@nucletudes.com;
reno.harboe.sorensen@esa.int; ewb@triumf.ca; ari.virtanen@phys.jyu.fi;
fuochi@isof.cnr.it
OI Virtanen, Ari/0000-0002-6591-6787
FU Defense Threat Reduction Agency; U.S. Department of the Energy;
[DE-AC04-94AL85000]
FX This work was supported in part by the Defense Threat Reduction Agency
and the U.S. Department of the Energy. 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-AC04-94AL85000.
NR 53
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Z9 7
U1 0
U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 2904
EP 2913
DI 10.1109/TNS.2008.2007799
PG 10
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400011
ER
PT J
AU Black, JD
Ball, DR
Robinson, WH
Fleetwood, DM
Schrimpf, RD
Reed, RA
Black, DA
Warren, KM
Tipton, AD
Dodd, PE
Haddad, NF
Xapsos, MA
Kim, HS
Friendlich, M
AF Black, J. D.
Ball, D. R., II
Robinson, W. H.
Fleetwood, D. M.
Schrimpf, R. D.
Reed, R. A.
Black, D. A.
Warren, K. M.
Tipton, A. D.
Dodd, P. E.
Haddad, N. F.
Xapsos, M. A.
Kim, H. S.
Friendlich, M.
TI Characterizing SRAM Single Event Upset in Terms of Single and Multiple
Node Charge Collection
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Heavy ion testing; multiple cell upset; single event modeling; SRAM
ID INDUCED SOFT ERRORS; CMOS SRAMS; BIT UPSET; SIMULATION; RADIATION;
DEVICES; MODEL; SEU
AB A well-collapse source-injection mode for SRAM SEU is demonstrated through TCAD modeling. The recovery of the SRAM's state is shown to be based upon the resistive path from the p+-sources in the SRAM to the well. Multiple cell upset patterns for direct charge collection and the well-collapse source-injection mechanisms are predicted and compared to SRAM test data.
C1 [Black, J. D.; Ball, D. R., II; Warren, K. M.] Vanderbilt Univ, Inst Space & Def Elect, Nashville, TN 37203 USA.
[Robinson, W. H.; Fleetwood, D. M.; Schrimpf, R. D.; Reed, R. A.; Tipton, A. D.] Vanderbilt Univ, Dept Elect Engn & Comp Sci, Nashville, TN 37235 USA.
[Black, D. A.] Vanderbilt Univ, Off Dean, Sch Engn, Nashville, TN 37235 USA.
[Dodd, P. E.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Haddad, N. F.] BAE Syst, Manassas, VA 20110 USA.
[Xapsos, M. A.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Kim, H. S.; Friendlich, M.] MEI Technol, Greenbelt, MD 20771 USA.
RP Black, JD (reprint author), Vanderbilt Univ, Inst Space & Def Elect, Nashville, TN 37203 USA.
EM jeffrey.d.black@vanderbilt.edu
RI Schrimpf, Ronald/L-5549-2013
OI Schrimpf, Ronald/0000-0001-7419-2701
FU NASA Electronic Parts and Packaging Program; Defense Threat Re-duction
Agency Radiation Hardened Microelectronics Program [NNG06GI61G]; United
States Department of Energy; Defense Threat Reduction Agency [08-43421];
[DE-AC04-94AL85000]
FX This work was supported in part by the NASA Electronic Parts and
Packaging Program and the Defense Threat Re-duction Agency Radiation
Hardened Microelectronics Program under contract IACI 6 #NNG06GI61G to
NASA. This work was supported by the United States Department of Energy
and the Defense Threat Reduction Agency under DTRA IACRO #08-43421.
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 15
TC 44
Z9 47
U1 0
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 2943
EP 2947
DI 10.1109/TNS.2008.2007231
PG 5
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400016
ER
PT J
AU Hjalmarson, HP
Pease, RL
Devine, RAB
AF Hjalmarson, Harold P.
Pease, Ronald L.
Devine, Roderick A. B.
TI Calculations of Radiation Dose-Rate Sensitivity of Bipolar Transistors
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Bimolecular reaction; bipolar junction transistor; cracking;
dimerization; dose rate; ELDRS; excess base current; hole; hydrogen;
interface trap; kinetics; proton; radiation; recombination; silicon
dioxide
ID INTERFACE-TRAP FORMATION; LOW ELECTRIC-FIELDS; GAIN DEGRADATION;
IONIZING-RADIATION; POSITIVE CHARGE; PHYSICAL MODEL; BASE OXIDES;
MECHANISMS; HYDROGEN; DEVICES
AB Mechanisms for dose-rate dependent effects of ionizing radiation are described. Bimolecular mechanisms are shown to produce reduced effects at high dose rates. Calculations using, such mechanisms are shown to produce good agreement with data from devices affected by enhanced low dose-rate sensitivity (ELDRS).
C1 [Hjalmarson, Harold P.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Pease, Ronald L.] RLP Res, Los Lunas, NM 87031 USA.
[Devine, Roderick A. B.] EMRTC NMT, Socorro, NM 87801 USA.
RP Hjalmarson, HP (reprint author), Sandia Natl Labs, MS 0316, Albuquerque, NM 87185 USA.
EM Albu-hphjalm@sandia.gov; lsrl-pease@wildblue.net; devine@chtm.unm.edu
FU U.S. Department of Energy [DE-AC04-94AL85000]; Lew Cohn of DTRA; NASA
Electronic Parts Program
FX Manuscript received July 12, 2008; revised September 30, 2008. Current
version published December 31, 2008. 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. R. L. Pease would
like to thank Lew Cohn of DTRA and the NASA Electronic Parts Program for
their support.
NR 45
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U1 0
U2 8
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3009
EP 3015
DI 10.1109/TNS.2008.2007487
PG 7
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400026
ER
PT J
AU Warner, JH
Inguimbert, C
Twigg, ME
Messenger, SR
Walters, RJ
Romero, MJ
Summers, GR
AF Warner, Jeffrey H.
Inguimbert, Christophe
Twigg, Mark E.
Messenger, Scott R.
Walters, Robert J.
Romero, Manuel J.
Summers, Geoffrey R.
TI Effect of Proton and Silicon Ion Irradiation on Defect Formation in GaAs
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Defect formation; disordered regions; displacement damage; EBIC; GaAs;
heavy ion; irradiation; NIEL; recoil spectrum; recombination centers;
TEM
ID LATENT TRACK FORMATION; INDUCED DISPLACEMENT DAMAGE; SI-IMPLANTED GAAS;
40 MEV FULLERENES; RADIATION-DAMAGE; HEAVY-IONS; ENERGY-DEPENDENCE;
NIEL; ELECTRON; SEMICONDUCTORS
AB Electrical and structural changes in GaAs are monitored using electron beam induced current (EBIC) and transmission electron microscopy (TEM) measurements after irradiation by protons and silicon ions. It has been determined that higher energy protons (E >= 10 MeV) and silicon ions disordered regions that are electrically and structurally different than those produced by lower energy protons. The data suggest that these disordered regions are responsible for causing the deviations between experimental data and NIEL. From analyses of the recoil spectra, high energy recoils appear to be responsible for the formation of these disordered regions.
C1 [Warner, Jeffrey H.; Twigg, Mark E.; Messenger, Scott R.; Walters, Robert J.] USN, Res Lab, Washington, DC 20375 USA.
[Warner, Jeffrey H.] Univ Maryland, Dept Phys, Baltimore, MD 21201 USA.
[Inguimbert, Christophe] ONERA DESP, F-31005 Toulouse, France.
[Romero, Manuel J.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Summers, Geoffrey R.] Univ Maryland, Baltimore, MD 21253 USA.
RP Warner, JH (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM Jeffrey.Warner@nrl.navy.mil; inguimbert@onecert.fr;
Manuel_Rornero@nrel.gov; gsummers@umbc.edu
NR 40
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U1 4
U2 12
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3016
EP 3024
DI 10.1109/TNS.2008.2006266
PG 9
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400027
ER
PT J
AU Chen, XJ
Barnaby, HJ
Vertneire, B
Holbert, KE
Wright, D
Pease, RL
Schrimpf, RD
Fleetwood, DM
Pantelides, ST
Shaneyfelt, MR
Adell, P
AF Chen, X. Jie
Barnaby, Hugh J.
Vertneire, Bert
Holbert, Keith E.
Wright, David
Pease, Ronald L.
Schrimpf, Ronald D.
Fleetwood, Daniel M.
Pantelides, Sokrates T.
Shaneyfelt, Marty R.
Adell, Philippe
TI Post-Irradiation Annealing Mechanisms of Defects Generated in
Hydrogenated Bipolar Oxides
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Bipolar oxide; gated bipolar devices; interface traps; hydrogen; oxide
trapped charge; radiation-induced
ID DOSE-RATE SENSITIVITY; INTERFACE-TRAP FORMATION; FIELD-EFFECT
TRANSISTORS; ENERGY-DISTRIBUTION; MOS DEVICES; CHARGE; ENVIRONMENTS;
DEGRADATION; PREDICTION; CIRCUITS
AB Bipolar test structures were irradiated and annealed with various combinations of molecular hydrogen gas ambients, bias, and thermal conditions. The results show that the buildup and annealing behavior of defects in bipolar base oxides depend strongly on hydrogen concentration. Differences observed in trapped oxide charge annealing rates suggest that the charged defects created in hydrogen-rich environments may be attributed to different types of positive charge in addition to trapped holes.
C1 [Chen, X. Jie; Barnaby, Hugh J.; Vertneire, Bert; Holbert, Keith E.; Wright, David] Arizona State Univ, Tempe, AZ 85287 USA.
[Pease, Ronald L.] RLP Res, Los Lunas, NM 87031 USA.
[Schrimpf, Ronald D.; Fleetwood, Daniel M.; Pantelides, Sokrates T.] Vanderbilt Univ, Nashville, TN 37235 USA.
[Shaneyfelt, Marty R.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Adell, Philippe] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Chen, XJ (reprint author), Arizona State Univ, Tempe, AZ 85287 USA.
EM j.chen@asu.edu; rpease@rlpresearch.com; ron.schimpf@vanderbilt.edu;
dan.fleetwood@vanderbilt.edu; pantelides@vanderbilt.edu;
shaneymr@sandia.gov; philippe.c.adell@jpl.nasa.gov
RI Holbert, Keith/B-6518-2008; Schrimpf, Ronald/L-5549-2013;
OI Schrimpf, Ronald/0000-0001-7419-2701; Holbert, Keith/0000-0002-2772-1954
FU NASA's Jet Propulsion Laboratory with funding from the NASA Electronics
Parts Program (NEPP); Air Force Office of Scientific Research with
funding from the MURI program; United States Department of Energy
[DE-AC04-94AL85000]
FX Manuscript received July 11, 2008; revised September 09, 2008. Current
version published December 31, 2008. This work is supported by NASA's
Jet Propulsion Laboratory with funding from the NASA Electronics Parts
Program (NEPP), and the Air Force Office of Scientific Research with
funding from the MURI program. This work is also supported by the United
States Department of Energy. 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 38
TC 7
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U1 3
U2 14
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3032
EP 3038
DI 10.1109/TNS.2008.2006972
PG 7
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400029
ER
PT J
AU Batyrev, IG
Hughart, D
Durand, R
Bounasser, M
Tuttle, BR
Fleetwood, DM
Schrimpf, RD
Rashkeev, SN
Dunham, GW
Law, ME
Pantelides, ST
AF Batyrev, I. G.
Hughart, D.
Durand, R.
Bounasser, M.
Tuttle, B. R.
Fleetwood, D. M.
Schrimpf, R. D.
Rashkeev, S. N.
Dunham, G. W.
Law, M. E.
Pantelides, S. T.
TI Effects of Hydrogen on the Radiation Response of Bipolar Transistors:
Experiment and Modeling
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Hydrogen soak; oxygen vacancy; radiation; simulations
ID INTERFACE TRAPS; BORDER TRAPS; MECHANISMS; DEVICES; SIO2; OXIDES
AB Reactions of H(2) in lateral, PNP BJTs are investigated through experiments and simulations. Pre-irradiation hydrogen exposure makes the devices more sensitive to ionizing radiation, which is explained through first-principles calculations and numerical simulations. Mechanisms for the cracking of hydrogen molecules and proton generation are proposed. We also suggest a mechanism of formation of border traps. When protons are trapped by oxygen vacancies right at or very near the interface, they form electrically active defects near the middle of the band gap. Activation energies of the reaction are used to construct rate equations. The rate equations are solved numerically to determine the spatial and temporal concentrations of hydrogen, holes, and protons. The calculated concentrations of interface and border traps agree well with the experimental results and help to explain the role of hydrogen in determining the total-dose response of BJTs.
C1 [Batyrev, I. G.; Pantelides, S. T.] Vanderbilt Univ, Dept Phys, Nashville, TN 37235 USA.
[Hughart, D.; Durand, R.; Bounasser, M.; Fleetwood, D. M.; Schrimpf, R. D.] Vanderbilt Univ, Dept Elect Engn & Comp Sci, Nashville, TN 37235 USA.
[Rashkeev, S. N.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
[Dunham, G. W.] NAVSEA Crane, Crane, IN 47522 USA.
[Law, M. E.] Univ Florida, Dept Elect & Comp Engn, Gainesville, FL 32611 USA.
RP Batyrev, IG (reprint author), Vanderbilt Univ, Dept Phys, Nashville, TN 37235 USA.
EM i.batyrev@vanderbilt.edu; david.r.hughart@vander-bilt.edu;
brt10@psu.edu; dan.fleetwood@vanderbilt.edu;
ron.schrimpf@vanderbilt.edu; sergey.rashkeev@inl.gov;
gary.dunham@navy.mil; law@tec.ufl.edu; pantelides@vanderbilt.edu
RI Schrimpf, Ronald/L-5549-2013
OI Schrimpf, Ronald/0000-0001-7419-2701
FU AFOSR MURI [FA9550-05-1-0306]; U.S. Navy; McMinn Endowment at Vanderbilt
University
FX Manuscript received July 11, 2008; revised September 12, 2008. Current
version published December 31, 2008. This work was supported in pan by
AFOSR MURI Grant (FA9550-05-1-0306), the U.S. Navy, and the McMinn
Endowment at Vanderbilt University.
NR 28
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U1 1
U2 12
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3039
EP 3045
DI 10.1109/TNS.2008.2009353
PG 7
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400030
ER
PT J
AU Bielejec, E
Vizkelethy, G
Fleming, RM
Wampler, WR
Myers, SA
King, DB
AF Bielejec, E.
Vizkelethy, G.
Fleming, R. M.
Wampler, W. R.
Myers, S. A.
King, D. B.
TI Comparison Between Experimental and Simulation Results for Ion Beam and
Neutron Irradiations in Silicon Bipolar Junction Transistors
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Damage equivalence; heavy ion irradiation; neutron damage; silicon
bipolar transistor
ID DISPLACEMENT DAMAGE; RADIATION; DEVICES; PROTON
AB We report on an early-time inverse gain comparison between ion and neutron irradiated silicon bipolar junction transistors. We find ion irradiations to be an excellent simulator for fast-burst neutrons for early-time behavior and damage creation rates. In addition we report on an experimental to simulation comparison of transient gain annealing response. The simulations are from a physics based modeling approach that is being developed at Sandia National Laboratories as part of the Qualification Alternatives to the Sandia Pulsed Reactor (QASPR) Program. We find excellent agreement between simulation and experiment across a wide range of irradiation conditions.
C1 [Bielejec, E.; Vizkelethy, G.; Fleming, R. M.; Wampler, W. R.; Myers, S. A.; King, D. B.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Bielejec, E (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM esbiele@sandia.gov; gvizkel@sandia.gov; rmflemi@sandia.gov;
wrwampl@sandia.gov; smmyers@sandia.gov; dbking@sandia.gov
RI Fleming, Robert/B-1248-2008
FU United States Department of Energy's National Nuclear Security
Administration [DE-AC04-94AL85000]
FX Manuscript received July 11, 2008; revised September 22, 2009. Current
version published December 31, 2008. 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 13
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U1 1
U2 19
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3055
EP 3059
DI 10.1109/TNS.2008.2007561
PG 5
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400032
ER
PT J
AU Quinn, H
Graham, P
Pratt, B
AF Quinn, Heather
Graham, Paul
Pratt, Brian
TI An Automated Approach to Estimating Hardness Assurance Issues in
Triple-Modular Redundancy Circuits in Xilinx FPGAs
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Fault identification; reliability analysis
ID ERROR PROPAGATION; RELIABILITY; NETWORKS; TOOL
AB The Xilinx Virtex family of static random access memory (SRAM) based field programmable gate array (FPGA) devices have made inroads into space-based computational platforms over the past decade. These devices are well-suited for digital signal processing (DSP) algorithms that are often used on orbit, providing the speedup of custom hardware without the cost of fabricating an application-specific integrated circuit (ASIC). SRAM FPGAs store the circuit in radiation-tolerant SRAM and SEUs can affect both the circuit functionality and the circuit state. Triple-modular redundancy (TMR) can be used to ask SEUs so that malfunctioning circuitry will not affect the output data. Unfortunately, applying TMR to a user circuit is difficult and unprotected cross-section is possible due to problems with the circuit design, device constraints, or the implementation of the user circuit on the FPGA. Given the complexity of these designs, estimating hardness assurance issues is not simple. This paper will present a tool, called the Scalable Tool for the Analysis of Reliable Circuits (STARC), that can automatically estimate unprotected cross-section and other hardness assurance issues for TMR-protected circuits.
C1 [Quinn, Heather; Graham, Paul] Los Alamos Natl Lab, ISR Space Data Syst 3, Los Alamos, NM 87545 USA.
[Pratt, Brian] Brigham Young Univ, Provo, UT 84602 USA.
RP Quinn, H (reprint author), Los Alamos Natl Lab, ISR Space Data Syst 3, POB 1663, Los Alamos, NM 87545 USA.
EM hquinn@lanl.gov
FU Department of Energy; NASA [NAG5-13516]; Air Force Research Laboratory
under the FPGA Mission Assurance Center
FX Manuscript received July 11, 2008; revised September 22, 2008 Current
version published December 31, 2008. Document release number:
LA-UR-08-04475. This work was funded by the Department of Energy through
the Deployable Adaptive Processing Systems and Sensor-Ofiented
Processing and Networking projects, NASA through the Reconfigurable
Hardware in Orbit Project under AIST contract #NAG5-13516, and the Air
Force Research Laboratory under the FPGA Mission Assurance Center.
NR 21
TC 6
Z9 7
U1 0
U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3070
EP 3076
DI 10.1109/TNS.2008.2006750
PG 7
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400034
ER
PT J
AU Shaneyfelt, MR
Felix, JA
Dodd, PE
Schwank, JR
Dalton, SM
Baggio, J
Ferlet-Cavrois, W
Paillet, P
Blackmore, EW
AF Shaneyfelt, Marty R.
Felix, James A.
Dodd, Paul E.
Schwank, James R.
Dalton, Scott M.
Baggio, Jacques
Ferlet-Cavrois, Wronique
Paillet, Philippe
Blackmore, Ewart W.
TI Enhanced Proton and Neutron Induced Degradation and Its Impact on
Hardness Assurance Testing
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Microdose effects; neutron effects; power MOSFETs; proton effects;
radiation effects; radiation hardness assurance; radiation hardness
assurance methodology; radiation hardness assurance testing; single
event effects
ID MOS DEVICES; X-RAY; BULK DAMAGE; DEPENDENCE; CHARGE; CO-60;
IRRADIATIONS; ELECTRONICS; BUILDUP; FIELD
AB It is shown that protons and neutrons can induce enhanced degradation in power MOSFETs, including both trench and planar geometry devices. Specifically, large shifts in current-voltage characteristics can be observed at extremely low proton total dose levels (as low as similar to 2 rad(SiO(2))). These shifts can induce significant increases in device "off" state leakage current. Neutron irradiations show similar degradation at equivalent fluence levels, even though neutrons do not deposit dose due to direct ionization. These data suggest that the mechanism responsible for the enhanced degradation is a microdose effect associated with secondary particles produced through nuclear interactions between protons and neutrons and the materials in integrated circuits. The secondary particles deposit enough charge in the gate oxide to induce a parasitic drain to source leakage path in the transistor. Although the results are demonstrated here for only trench and planar geometry power MOSFETs, microdose effects can impact the radiation response of other integrated circuit types. Hardness assurances issues implications are discussed.
C1 [Shaneyfelt, Marty R.; Felix, James A.; Dodd, Paul E.; Schwank, James R.; Dalton, Scott M.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Baggio, Jacques; Ferlet-Cavrois, Wronique; Paillet, Philippe] CEA, DIF, F-91680 Bruyeres Le Chatel, France.
[Blackmore, Ewart W.] TRIUMF, Vancouver, BC V6T2A3, Canada.
RP Shaneyfelt, MR (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM shaneymr@sandia.gov; jafelix@sandia.gov; pedodd@sandia.gov;
schwanjr@sandia.gov; smdalto@sandia.gov; jacques.baggio@cea.fr;
veronique.ferlet@cea.fr; philippe.paillet@cea.fr; ewb@triumf.ca
FU U.S. Department of Energy [DE-AC04-94AL85000]; Defense Threat Reduction
Agency; [DTRA IACRO, 08-43421]
FX Manuscript received July 11, 2008; revised September 18, 2008 and
September 24, 2008. Current version published December 31, 2008. This
work was supported by the U.S. Department of Energy and the Defense
Threat Reduction Agency under DTRA IACRO, #08-43421. Sandia is a
multiprograrn 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 30
TC 13
Z9 16
U1 1
U2 9
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3096
EP 3105
DI 10.1109/TNS.2008.2007124
PG 10
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400038
ER
PT J
AU Charara, YM
Townsend, LW
Gabriel, TA
Zeitlin, CJ
Heilbronn, LH
Miller, J
AF Charara, Youssef M.
Townsend, Lawrence W.
Gabriel, Tony A.
Zeitlin, Cary J.
Heilbronn, Lawrence H.
Miller, Jack
TI HETC-HEDS Code Validation Using Laboratory Beam Energy Loss Spectra Data
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Experimental validation; particle beams; radiation effects; radiation
transport codes
ID CROSS-SECTIONS
AB Recently, the Monte Carlo transport code HETC has been extended to include the interactions and transport of energetic heavy ions. Here, for the first time, we compare predictions of fragment production and energy loss with laboratory data measured at Brookhaven National Laboratory and at the National Institute of Radiological Sciences in Japan. Very good agreement is found for predicted and measured energy loss spectra for a variety of incident laboratory beams and targets.
C1 [Charara, Youssef M.; Townsend, Lawrence W.] Univ Tennessee, Dept Nucl Engn, Knoxville, TN 37996 USA.
[Gabriel, Tony A.] Sci Invest & Dev, Knoxville, TN 37922 USA.
[Zeitlin, Cary J.; Heilbronn, Lawrence H.; Miller, Jack] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Charara, YM (reprint author), Univ Tennessee, Dept Nucl Engn, Knoxville, TN 37996 USA.
EM ysharara@tennessee.edu; ltownsen@tennessee.edu;
jkgabriella@earthlink.net; zeitlin@boulder.swri.edu; lheilbro@utk.edu;
j_miller@lbl.gov
RI Heilbronn, Lawrence/J-6998-2013
OI Heilbronn, Lawrence/0000-0002-8226-1057
FU National Aeronautics and Space Administration [NNL07AA36C]
FX Manuscript received July 10, 2008; revised September 08, 2008. Current
version published December 31, 2008. This work was supported in part by
the National Aeronautics and Space Administration under Contract
NNL07AA36C.
NR 13
TC 8
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U1 0
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3164
EP 3168
DI 10.1109/TNS.2008.2006607
PG 5
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400048
ER
PT J
AU Pease, RL
Adell, PC
Rax, BG
Chen, XJ
Barnaby, HJ
Holbert, KE
Hjalmarson, HP
AF Pease, Ronald L.
Adell, Philippe Claude
Rax, Bernard G.
Chen, Xiao Jie
Barnaby, Hugh J.
Holbert, Keith E.
Hjalmarson, Harold P.
TI The Effects of Hydrogen on the Enhanced Low Dose Rate Sensitivity
(ELDRS) of Bipolar Linear Circuits
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Dose rate; enhanced low-dose rate sensitivity; hydrogen; interface
traps; radiation effects; total ionizing dose; voltage comparator
ID RADIATION; TRANSISTORS; DEPENDENCE; MECHANISMS; ICS
AB It is experimentally demonstrated with test transistors and circuits that hydrogen is correlated with enhanced low dose rate sensitivity (ELDRS) in bipolar linear circuits. These experiments show that the amount of hydrogen determines the total dose response versus dose rate, both the saturation at low dose rate and the transition dose rate between the high and low dose rate responses. The experimental results are supported with modeling calculations using REOS (Radiation Effects in Oxides and Semiconductors).
C1 [Pease, Ronald L.] RLP Res, Los Lunas, NM 87031 USA.
[Adell, Philippe Claude; Rax, Bernard G.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Chen, Xiao Jie; Barnaby, Hugh J.; Holbert, Keith E.] Arizona State Univ, Tempe, AZ 85287 USA.
[Hjalmarson, Harold P.] Sandia Natl Labs, Albuquerque, NM 87186 USA.
RP Pease, RL (reprint author), RLP Res, Los Lunas, NM 87031 USA.
EM rpease@rlpresearch.com; philippe.c.adell@jpl.nasa.gov;
bernard.g.rax@jpl.nasa.gov; j.chen@asu.edu; hbarnaby@asu.edu;
keith.holbert@asu.edu; hphjalm@sandia.gov
RI Holbert, Keith/B-6518-2008;
OI Holbert, Keith/0000-0002-2772-1954
FU Defense Threat Reduction Agency with NAVSEA Crane and ATK Mission
Research [N00164-02-D-6599]; NASA Electronic Parts Program; United
States Department of Energy's National Nuclear Security Administration
[DE-AC04-94AL85000]
FX Manuscript received July 11, 2008; revised August 23, 2008. Current
version published December 31, 2008. This work was supported in part by
the Defense Threat Reduction Agency through Contract N00164-02-D-6599
with NAVSEA Crane and ATK Mission Research and by the NASA Electronic
Parts Program. 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 20
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U1 0
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3169
EP 3173
DI 10.1109/TNS.2008.2006478
PG 5
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400049
ER
PT J
AU Gasperin, A
Paccagnella, A
Schwank, JR
Vizkelethy, G
Ottogalli, F
Pellizzer, F
AF Gasperin, Alberto
Paccagnella, Alessandro
Schwank, James R.
Vizkelethy, Gyorgy
Ottogalli, Federica
Pellizzer, Fabio
TI Analysis of Proton and Heavy-Ion Irradiation Effects on Phase Change
Memories With MOSFET and BJT Selectors
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Chalcogenide material; GST; heavy ions; non-volatile memories; phase
change memories (PCM); radiation effects
ID SHALLOW-TRENCH ISOLATION; RADIATION; TECHNOLOGIES
AB We study proton and heavy ion irradiation effects on Phase Change Memories (PCM) with MOSFET and BJT selectors and the effect of the irradiation on the retention characteristics of these devices. Proton irradiation produces noticeable variations in the cell distributions in PCM with MOSFET selectors moistly due to leakage currents affecting the transistors. PCM with BJT selectors show only small variations after proton irradiation. PCM cells do not appear to be impacted by heavy-ion irradiation. Using high temperature accelerated retention tests, we demonstrate that the retention capability of these memories is not compromised by the irradiation.
C1 [Gasperin, Alberto; Paccagnella, Alessandro] Univ Padua, Dipartimento Ingn Informaz, I-35131 Padua, Italy.
[Gasperin, Alberto; Paccagnella, Alessandro] Ist Nazl Fis Nucl, I-35131 Padua, Italy.
[Schwank, James R.; Vizkelethy, Gyorgy] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Ottogalli, Federica; Pellizzer, Fabio] Numonyx, Agrate Brianza, Italy.
RP Gasperin, A (reprint author), Univ Padua, Dipartimento Ingn Informaz, I-35131 Padua, Italy.
EM alberto.gasperin@dei.unipd.it; alessandro.paccagnella@dei.unipd.it;
schwanjr@sandia.gov; gvizkel@sandia.gov;
federica.ottogalli@nuimonyx.com; fabio.pellizzer@numonyx.com
FU PRIN-MIUR, Italy; FIRB; Defense Threat Reduction Agency; U.S. Department
of Energy; United States Department of Energy's National Nuclear
Security Administration [DE-AC04-94AL85000]
FX This work was supported in part by PRIN-MIUR, Italy, project "Memorie
non volatili nanometriche a cambiamento di fase", in part by FIRB,
"Tecnologie innovative per lo sviluppo di memorie non volatili ad alta
densita", and the Sandia portion of this work was supported by the
Defense Threat Reduction Agency and the U.S. Department of Energy.
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 24
TC 3
Z9 4
U1 0
U2 10
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
EI 1558-1578
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3189
EP 3196
DI 10.1109/TNS.2008.2007639
PN 1
PG 8
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400052
ER
PT J
AU Draper, B
Dockerty, R
Shaneyfelt, M
Habermehl, S
Murray, J
AF Draper, Bruce
Dockerty, Robert
Shaneyfelt, Marty
Habermehl, Scott
Murray, James
TI Total Dose Radiation Response of NROM-Style SOI Non-Volatile Memory
Elements
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE CMOS memory integrated circuits; radiation effects; radiation hardening;
semiconductor radiation effects
ID TRANSISTORS
AB For the first time, NROM-style nonvolatile memory elements were fabricated in SOI and irradiated. Total dose characterizations of these transistors indicate that this new style of memory can be functional to at least 500 krad(SiO(2)).
C1 [Draper, Bruce; Dockerty, Robert; Shaneyfelt, Marty; Habermehl, Scott; Murray, James] Sandia Natl Labs, Albuquerque, NM 87114 USA.
RP Draper, B (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87114 USA.
FU U.S. Department of Energy; United States Department of Energy's National
Nuclear Security Administration [DE-AC04-94AL85000]
FX This work was supported by the U.S. Department of Energy. 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 11
TC 13
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U1 1
U2 6
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3202
EP 3205
DI 10.1109/TNS.2008.2007566
PG 4
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400054
ER
PT J
AU Schwank, JR
Shaneyfelt, MR
Dasgupta, A
Francis, SA
Zhou, XJ
Fleetwood, DM
Schrimpf, RD
Pantelides, ST
Felix, JA
Dodd, PE
Ferlet-Cavrois, V
Paillet, P
Dalton, SM
Swanson, SE
Hash, GL
Thornberg, SM
Hochrein, JM
Lum, GK
AF Schwank, James R.
Shaneyfelt, Marty R.
Dasgupta, Aritra
Francis, S. A.
Zhou, Xing J.
Fleetwood, Daniel M.
Schrimpf, Ronald D.
Pantelides, Sokrates T.
Felix, James A.
Dodd, Paul E.
Ferlet-Cavrois, Veronique
Paillet, Philippe
Dalton, Scott M.
Swanson, Scot E.
Hash, Gerald L.
Thornberg, Steve M.
Hochrein, James M.
Lum, Gary K.
TI Effects of Moisture and Hydrogen Exposure on Radiation-Induced MOS
Device Degradation and Its Implications for Long-Term Aging
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Aging effects; hydrogen exposure; ionizing radiation; moisture exposure;
MOS radiation effects
ID INTERFACE-TRAP BUILDUP; DOSE-RATE SENSITIVITY; 1/F NOISE; BORDER TRAPS;
HARDNESS ASSURANCE; ANNEALING RESPONSE; OXIDE; IRRADIATION; CHARGE;
RELIABILITY
AB Transistors and ICs built in several different captive and commercial facilities were exposed to moisture, irradiated, and annealed. The moisture exposures were performed using highly accelerated stress test (HAST) at 130 degrees C and 85% relative humidity. Irradiation of n-channel transistors exposed to HAST followed by a long-term anneal resulted in some increase in interface-trap and oxide-trapped charge buildup. However, exposing p-channel transistors to HAST preirradiation resulted extremely large and unexpected voltage shifts immediately following irradiation. They-were observed for devices with either doped oxide or nitride final chip passivation. Because of this, nitride passivation may not be sufficient to prevent H(2)O from causing enhanced radiation-induced degradation over long time periods in some devices (e.g., commercial devices with nitride final chip passivation packaged in plastic packages). The smaller voltage shifts for the n-channel transistors may be related to the formation of phosphosilicate glass (PSG) overlying the sources and drains of the n-channel transistors impeding the diffusion of moisture to the gate oxides. It is shown that, the large radiation-induced voltage shifts for the p-channel transistors can lead to enhanced IC parametric degradation and functional failure at lower radiation levels. Large increases in radiation-induced field oxide leakage current were also observed for transistors exposed to HAST preirradiation. Transistors were also annealed (prior to irradiation) and irradiated in H(2). Approximately the same level of radiation-induced degradation was observed for n- and p-channel transistors suggesting that the diffusion kinetics for H(2) diffusion are considerably different than for H(2)O diffusion. These results raise the concern that exposure of devices to moisture or hydrogen can lead to long-term radiation-induced aging effects.
C1 [Schwank, James R.; Shaneyfelt, Marty R.; Felix, James A.; Dodd, Paul E.; Swanson, Scot E.; Hash, Gerald L.; Thornberg, Steve M.; Hochrein, James M.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Dasgupta, Aritra; Francis, S. A.; Zhou, Xing J.; Fleetwood, Daniel M.; Schrimpf, Ronald D.; Pantelides, Sokrates T.] Vanderbilt Univ, Nashville, TN 37235 USA.
[Ferlet-Cavrois, Veronique; Paillet, Philippe] CEA DIF, F-91680 Bruyeres Le Chatel, France.
[Lum, Gary K.] Lockheed Martin Space Syst, Sunnyvale, CA 94088 USA.
RP Schwank, JR (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM schwanjr@sandia.gov; shaneymr@sandia.gov;
aritra.dasgupta@vanderbilt.edu; sarah.a.francis@vanderbilt.edu;
zhoux@us.ibm.com; dan.fleetwood@vander-bilt.edu;
ron.schrimpf@vanderbilt.edu; pantelides@vanderbilt.edu;
jim_felix@yahoo.com; pedodd@sandia.go; veronique.ferlet@cea.fr;
philippe.paillet@cea.fr; smdalton@sandia.gov; swansose@sandia.gov;
hashgl@sandia.gov; smthorn@sandia.gov; jmhochr@sandia.gov;
gary.lum@lmco.com
RI Schrimpf, Ronald/L-5549-2013
OI Schrimpf, Ronald/0000-0001-7419-2701
FU U.S. Departments of Navy and Energy; United States Department of
Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
FX This work was supported by the U.S. Departments of Navy and Energy.
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 3
Z9 4
U1 0
U2 15
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3206
EP 3215
DI 10.1109/TNS.2008.2005676
PG 10
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400055
ER
PT J
AU Baze, MP
Hughlock, B
Wert, J
Tostenrude, J
Massengill, L
Amusan, O
Lacoe, R
Lilja, K
Johnson, M
AF Baze, M. P.
Hughlock, Barrie
Wert, J.
Tostenrude, Joe
Massengill, Lloyd
Amusan, Oluwole
Lacoe, Ronald
Lilja, Klas
Johnson, Mike
TI Angular Dependence of Single Event Sensitivity in Hardened Flip/Flop
Designs
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Dual interlocked storage cell (DICE); flip-flop; linear energy transfer
(LET); propagation; single event upset (SEU)
ID UPSETS; CMOS
AB SEU data on 90 nm structures displays a strong dependence on incident angle. A right parallelepiped (RPP) approximation is clearly not applicable to the observed response. This paper presents the data, possible mechanisms, and implications for testing and error rate predictions.
C1 [Baze, M. P.; Hughlock, Barrie; Wert, J.; Tostenrude, Joe] Boeing Phantom Works, Seattle, WA 98124 USA.
[Massengill, Lloyd; Amusan, Oluwole] Vanderbilt Univ, Inst Space & Def Elect, Nashville, TN 37235 USA.
[Lacoe, Ronald] Aerosp Corp, El Segundo, CA 90245 USA.
[Lilja, Klas] Robust Chip Inc, Pleasanton, CA 94588 USA.
[Johnson, Mike] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Baze, MP (reprint author), Boeing Phantom Works, Seattle, WA 98124 USA.
FU DARPA [HR00111-04-C-0106]; DTRA [HDTRA-05-C-0001]
FX This work supported by DARPA Contract #HR00111-04-C-0106 and DTRA
Contract HDTRA-05-C-0001.
NR 8
TC 30
Z9 31
U1 1
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3295
EP 3301
DI 10.1109/TNS.2008.2009115
PG 7
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400067
ER
PT J
AU Heidel, DF
Marshall, PW
Label, KA
Schwank, JR
Rodbell, KP
Hakey, MC
Berg, MD
Dodd, PE
Friendlich, MR
Phan, AD
Seidleck, CM
Shaneyfelt, MR
Xapsos, MA
AF Heidel, David F.
Marshall, Paul W.
LaBel, Kenneth A.
Schwank, James R.
Rodbell, Kenneth P.
Hakey, Mark C.
Berg, Melanie D.
Dodd, Paul E.
Friendlich, Mark R.
Phan, Anthony D.
Seidleck, Christina M.
Shaneyfelt, Marty R.
Xapsos, Michael A.
TI Low Energy Proton Single-Event-Upset Test Results on 65 nm SOI SRAM
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Proton irradiation; silicon-on-insulator (SOI) technology; single event
upset (SEU); SRAM
AB Experimental results are presented on proton induced single-event-upsets (SEU) on a 65 nm silicon-on-insulator (SOI) SRAM. The low energy proton SEU results are very different for the 65 nm SRAM as compared with SRAMs fabricated in previous technology generations. Specifically, no upset threshold is observed as the proton energy is decreased down to 1 MeV; and a sharp rise in the upset cross-section is observed below 1 MeV. The increase below 1 MeV is attributed to upsets caused by direct ionization from the low energy protons. The implications of the low energy proton upsets are discussed for space applications of 65 nm SRAMs; and the implications for radiation assurance testing are also discussed.
C1 [Heidel, David F.; Rodbell, Kenneth P.] IBM Corp, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA.
[Marshall, Paul W.] NASA, Brookneal, VA 24528 USA.
[LaBel, Kenneth A.; Xapsos, Michael A.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Schwank, James R.; Dodd, Paul E.; Shaneyfelt, Marty R.] Sandia Natl Labs, Albuquerque, NM 87175 USA.
[Hakey, Mark C.] IBM Syst & Technol Grp, Essex Jct, VT 05452 USA.
[Berg, Melanie D.; Friendlich, Mark R.; Phan, Anthony D.; Seidleck, Christina M.] MEI Technol, Greenbelt, MD 20771 USA.
RP Heidel, DF (reprint author), IBM Corp, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA.
EM heidel@us.ibm.com; pwmar-shall@aol.com; kenneth.a.label@nasa.gov;
schwanjr@sandia.gov; rodbell@us.ibm.com; mhakey@us.ibm.com;
md-berg@pop500.gsfc.nasa.gov; pedodd@sandia.gov;
mark.r.friendlich.1@gsfc.nasa.gov; an-thony.d.phan.1@gsfc.nasa.gov;
christina.m.seidleck.1@gsfc.nasa.gov; shaneymr@sandia.gov;
michael.a.xapsos@nasa.gov
FU NASA Electronic and Parts Packaging Program; Defense Threat Reduction
Agency; U.S. Department of Energy; United States Department of Energy's
National Nuclear Security Administration [DE-AC04-94AL85000]
FX This work was supported in part by the NASA Electronic and Parts
Packaging Program, by the Defense Threat Reduction Agency, and by the
U.S. Department of Energy. 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-AC04-94AL85000.
NR 13
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U2 11
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3394
EP 3400
DI 10.1109/TNS.2008.2005499
PG 7
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400082
ER
PT J
AU Balasubramanian, A
McMorrow, D
Nation, SA
Bhuva, BL
Reed, RA
Massengill, LW
Loveless, TD
Amusan, OA
Black, JD
Melinger, JS
Baze, MP
Ferlet-Cavrois, V
Gaillardin, M
Schwank, JR
AF Balasubramanian, Anupama
McMorrow, Dale
Nation, Sarah A.
Bhuva, Bharat L.
Reed, Robert A.
Massengill, Lloyd W.
Loveless, Thomas D.
Amusan, Oluwole A.
Black, Jeffrey D.
Melinger, Joseph S.
Baze, Mark P.
Ferlet-Cavrois, Veronique
Gaillardin, Marc
Schwank, James R.
TI Pulsed Laser Single-Event Effects in Highly Scaled CMOS Technologies in
the Presence of Dense Metal Coverage
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Complementary metal-oxide-semiconductor (CMOS); laser; metal-fill;
single event (SE); single-photon absorption (SPA); two-photon absorption
(TPA)
ID 2-PHOTON ABSORPTION; SEU; VALIDATION
AB Single-photon (SPA) and two-photon laser absorption (TPA) techniques are established as reliable, effective methods to study specific single-event (SE) phenomena in advanced CMOS technologies. However, dense metal-fill in these nanoscale processes can prevent the use of top-side SPA in some cases. This paper demonstrates a novel methodology enabling top-side laser SPA single-event effects (SEEs) measurements in the presence of dense metal-fill for a test circuit fabricated in a commercial 90 nm CMOS process and validates it using unimpeded, through-wafer TPA approach. This is achieved by measuring and comparing the SEU thresholds for the sample circuit using both techniques.
C1 [Balasubramanian, Anupama; Nation, Sarah A.; Bhuva, Bharat L.; Reed, Robert A.; Massengill, Lloyd W.; Loveless, Thomas D.; Amusan, Oluwole A.] Vanderbilt Univ, Radiat Effects Grp, Dept Elect Engn & Comp Sci, Nashville, TN 37235 USA.
[McMorrow, Dale; Melinger, Joseph S.] USN, Res Lab, Washington, DC 20375 USA.
[Black, Jeffrey D.] Vanderbilt Univ, Inst Space & Def Elect, Nashville, TN 37235 USA.
[Baze, Mark P.] Boeing, Seattle, WA USA.
[Ferlet-Cavrois, Veronique; Gaillardin, Marc] CEA DIF, F-91680 Bruyeres Le Chatel, France.
[Schwank, James R.] Sandia Natl Labs, Albuquerque, NM 87123 USA.
RP Balasubramanian, A (reprint author), Vanderbilt Univ, Radiat Effects Grp, Dept Elect Engn & Comp Sci, Nashville, TN 37235 USA.
EM anuparna.balasubramanian@van-derbilt.edu; mcmorrow@ccs.nrl.navy.mil
RI Loveless, Thomas/G-9420-2011; Loveless, Thomas/C-7132-2016
FU Defense Threat Reduction Agency; U. S. Department of Energy; Sandia
Corporation; Lockheed Martin Company; United States Department of
Energy's National Nuclear Security Administration [DE-AC04-94AL85000];
French Ministry of Defence (MOD/DGA)
FX This work was supported in part by the Defense Threat Reduction Agency.
The computational portion of this work was conducted through Vanderbilt
University's Advanced Computing Center for Research and Education
(ACCRE). The part of this work performed at the Naval Research
Laboratory and the part performed at Sandia National Laboratories was
supported by the Defense Threat Reduction Agency. The Sandia effort was
supported in part by the U. S. Department of Energy. 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. The
part of the work performed at the Commissariat a l'Energie Atomique
(CEA/DIF) was supported by the French Ministry of Defence (MOD/DGA).
NR 18
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U1 0
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3401
EP 3406
DI 10.1109/TNS.2008.2007295
PG 6
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400083
ER
PT J
AU Teifel, J
AF Teifel, John
TI Self-Voting Dual-Modular-Redundancy Circuits for Single-Event-Transient
Mitigation
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Asynchronous circuits; combinational logic; sequential logic; single
event effects
ID SET CHARACTERIZATION; GUARD-GATES; ELEMENT; DESIGN; TAG
AB Dual-modular-redundancy (DMR) architectures use duplication and self-voting asynchronous circuits to mitigate single event transients (SETs). The area and performance of DMR circuitry is evaluated against conventional triple-modular-redundancy (TMR) logic. Benchmark ASIC circuits designed with DMR logic show a 10-24% area improvement for flip-Hop designs, and a 33% improvement for latch designs.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Teifel, J (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM jteifel@sandia.gov
NR 17
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U1 0
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3435
EP 3439
DI 10.1109/TNS.2008.2005583
PN 1
PG 5
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400088
ER
PT J
AU Holbert, KE
Heger, AS
Geschke, DM
Stewart, RA
AF Holbert, Keith E.
Heger, A. Sharif
Geschke, D. Michael
Stewart, Ryan A.
TI Prediction of Corning InfiniCor 300 Optical Fiber Attenuation at Low
Gamma Dose Rates
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Gamma-ray effects; optical fiber cables; optical fiber radiation
effects; photon radiation effects
ID RADIATION-INDUCED ATTENUATION; PULSED X-RAY; INDUCED DEFECTS;
WAVE-GUIDES; IRRADIATION; NEUTRON; TEMPERATURE; WAVEGUIDES; DEPENDENCE;
NONMETALS
AB Experiments using dose rates of 40 and 1270 rads/min from Co-60 and dual optical wavelengths, 850 and 1310 nm, are conducted to estimate fiber optic attenuation at other dose rates using low order kinetics models. The irradiation-induced attenuation is fit to power and saturating exponential models. The 1310 nm data exhibit a linearly increasing term with the saturating exponential whereas the 850 nm results do not. Representation of the long-term low-dose-rate induced attenuation is an impetus for developing a difference equation fitting routine that better characterizes the signal loss and has the capability of predicting the attenuation at saturation.
C1 [Holbert, Keith E.] Arizona State Univ, Dept Elect Engn, Tempe, AZ 85287 USA.
[Heger, A. Sharif] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Holbert, KE (reprint author), Arizona State Univ, Dept Elect Engn, Tempe, AZ 85287 USA.
EM holbert@asu.edu; heger@lanl.gov; m@geschke.us; ryan.stewart@aps.com
RI Holbert, Keith/B-6518-2008;
OI Holbert, Keith/0000-0002-2772-1954
FU Los Alamos National Laboratory [47467-001-07]
FX This work was supported in part by the Los Alamos National Laboratory
under Subcontract 47467-001-07.
NR 38
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U1 0
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3515
EP 3522
DI 10.1109/TNS.2008.2005904
PG 8
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398DS
UT WOS:000262713400099
ER
PT J
AU Vandelli, W
Abolins, M
Battaglia, A
Beck, HP
Blair, R
Bogaerts, AJ
Bosman, M
Ciobotaru, MD
Cranfield, R
Crone, G
Dawson, J
Dobinson, R
Dobson, M
Dos Anjos, A
Drake, G
Ermoline, Y
Ferrari, R
Ferrer, ML
Francis, D
Gadomski, S
Gameiro, S
Gorini, B
Green, B
Haberichter, W
Haberli, C
Hauser, R
Hinkelbein, C
Hughes-Jones, R
Joos, M
Kieft, G
Klous, S
Korcyl, K
Kordas, K
Kugel, A
Leahu, L
Lehmann, G
Martin, B
Mapelli, L
Meessen, C
Meirosu, C
Misiejuk, A
Mornacchi, G
Muller, M
Nagasaka, Y
Negri, A
Pasqualucci, E
Pauly, T
Petersen, J
Pope, B
Schlereth, J
Spiwoks, R
Stancu, S
Strong, J
Sushkov, S
Szymocha, T
Tremblet, L
Unel, G
Vermeulen, J
Werner, P
Wheeler-Ellis, S
Wickens, F
Wiedenmann, W
Yu, M
Yasu, Y
Zhang, J
Zobernig, H
AF Vandelli, W.
Abolins, M.
Battaglia, A.
Beck, H. P.
Blair, R.
Bogaerts, A. J.
Bosman, M.
Ciobotaru, M. D.
Cranfield, R.
Crone, G.
Dawson, J.
Dobinson, R.
Dobson, M.
Dos Anjos, A.
Drake, G.
Ermoline, Y.
Ferrari, R.
Ferrer, M. L.
Francis, D.
Gadomski, S.
Gameiro, S.
Gorini, B.
Green, B.
Haberichter, W.
Haeberli, C.
Hauser, R.
Hinkelbein, C.
Hughes-Jones, R.
Joos, M.
Kieft, G.
Klous, S.
Korcyl, K.
Kordas, K.
Kugel, A.
Leahu, L.
Lehmann, G.
Martin, B.
Mapelli, L.
Meessen, C.
Meirosu, C.
Misiejuk, A.
Mornacchi, G.
Mueller, M.
Nagasaka, Y.
Negri, A.
Pasqualucci, E.
Pauly, T.
Petersen, J.
Pope, B.
Schlereth, J.
Spiwoks, R.
Stancu, S.
Strong, J.
Sushkov, S.
Szymocha, T.
Tremblet, L.
Unel, G.
Vermeulen, J.
Werner, P.
Wheeler-Ellis, S.
Wickens, F.
Wiedenmann, W.
Yu, M.
Yasu, Y.
Zhang, J.
Zobernig, H.
TI The ATLAS Event Builder
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Bonding; computer network performance; data acquisition; nuclear
physics; programming; software performance
AB Event data from proton-proton collisions at the LHC will be selected by the ATLAS experiment in a three-level trigger system, which, at its first two trigger levels (LVL1+LVL2), reduces the initial bunch crossing rate of 40 MHz to similar to 3 kHz. At this rate, the Event Builder collects the data from the readout system PCs (ROSs) and provides fully assembled events to the Event Filter (EF). The EF is the third trigger level and its aim is to achieve a further rate reduction to similar to 200 Hz on the permanent storage. The Event Builder is based on a farm of O(100) PCs, interconnected via a Gigabit Ethernet to O(150) ROSs. These PCs run Linux and multi-threaded software applications implemented in C++. All the ROSs, and substantial fractions of the Event Builder and Event Filter PCs have been installed and commissioned. We report on performance tests on this initial system, which is capable of going beyond the required data rates and bandwidths for Event Building for the ATLAS experiment.
C1 [Vandelli, W.; Bogaerts, A. J.; Dobinson, R.; Francis, D.; Gameiro, S.; Gorini, B.; Joos, M.; Lehmann, G.; Martin, B.; Mapelli, L.; Mornacchi, G.; Pauly, T.; Petersen, J.; Spiwoks, R.; Tremblet, L.; Unel, G.; Werner, P.] CERN, Geneva, Switzerland.
[Abolins, M.; Ermoline, Y.; Hauser, R.; Pope, B.] Michigan State Univ, Ann Arbor, MI 48109 USA.
[Battaglia, A.; Beck, H. P.; Haeberli, C.; Kordas, K.] Univ Bern, Lab High Energy Phys Dept, CH-3012 Bern, Switzerland.
[Blair, R.; Dawson, J.; Drake, G.; Haberichter, W.; Schlereth, J.; Zhang, J.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Bosman, M.; Sushkov, S.] Univ Autonoma Barcelona, IFAE, Barcelona, Spain.
[Ciobotaru, M. D.; Negri, A.; Stancu, S.; Wheeler-Ellis, S.] Univ Calif Irvine, Irvine, CA 92697 USA.
[Cranfield, R.; Crone, G.] UCL, London, England.
[Dos Anjos, A.; Wiedenmann, W.; Zobernig, H.] Univ Wisconsin, Madison, WI 53706 USA.
[Ferrari, R.] Ist Nazl Fis Nucl, Sez Pavia, Pavia, Italy.
[Ferrer, M. L.] INFN Frascati, Frascati, Italy.
[Gadomski, S.] Univ Geneva, Geneva, Switzerland.
[Green, B.; Misiejuk, A.; Strong, J.] Univ London, Royal Holloway Coll, Dept Phys, London, England.
[Hinkelbein, C.; Kugel, A.; Mueller, M.; Yu, M.] Univ Mannheim, Mannheim, Germany.
[Hughes-Jones, R.] Univ Manchester, Manchester, Lancs, England.
[Kieft, G.; Klous, S.; Vermeulen, J.] NIKHEF, Amsterdam, Netherlands.
[Korcyl, K.; Szymocha, T.] PAS, H Niewodniczanski Inst Nucl Phys, Krakow, Poland.
[Leahu, L.; Meirosu, C.] Natl Inst Phys & Nucl Engn, Bucharest, Romania.
[Meessen, C.] CPPM, Marseille, France.
[Nagasaka, Y.] Hiroshima Inst Technol, Hiroshima, Japan.
[Pasqualucci, E.] Univ Roma La Sapienza, Rome, Italy.
[Pasqualucci, E.] Ist Nazl Fis Nucl, Rome, Italy.
[Wickens, F.] Rutherford Appleton Lab, CCLRC, Didcot OX11 0QX, Oxon, England.
[Yasu, Y.] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki, Japan.
RP Vandelli, W (reprint author), CERN, Geneva, Switzerland.
EM wainer.vandelli@cern.ch
RI Bosman, Martine/J-9917-2014;
OI Bosman, Martine/0000-0002-7290-643X; Beck, Hans
Peter/0000-0001-7212-1096
FU European Community's Sixth Framework Programme [MRTN-CT-2006-035606]
FX This work was supported in part by a Marie Curie Early Stage Research
Training Fellowship of the European Community's Sixth Framework
Programme under contract number MRTN-CT-2006-035606.
NR 6
TC 3
Z9 3
U1 0
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3556
EP 3562
DI 10.1109/TNS.2008.2006050
PG 7
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398EC
UT WOS:000262714400005
ER
PT J
AU Tringe, JW
Conway, AM
Felter, TE
Chan, WJM
Castelaz, J
Lordi, V
Xia, Y
Stevens, CG
Wetzel, C
AF Tringe, J. W.
Conway, A. M.
Felter, T. E.
Chan, W. J. Moberly
Castelaz, J.
Lordi, V.
Xia, Y.
Stevens, C. G.
Wetzel, C.
TI Radiation Effects on InGaN Quantum Wells and GaN Simultaneously Probed
by Ion Beam-Induced Luminescence
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Alpha particle; InGaN; light-emitting diode; quantum well; radiation
ID LIGHT-EMITTING-DIODES; GALLIUM NITRIDE; ENERGY; ORIGIN
AB InGaN quantum well structures on GaN epilayers were exposed to 500 keV alpha particles to fluences above 10(14) CM, to probe the relative radiation tolerance of the epilayer and wells. Performance was estimated by the intensity of ion-beam induced luminescence. Two separate types of quantum well structures emitted at 470 and 510 nm prior to irradiation, and only small wavelength shifts were observed even with the highest alpha fluences. Complementary cathodoluminescence experiments showed that luminescence in the quantum wells is strongly influenced by charges injected deep into the GaN epilayer. The 500 keV alpha penetration depth was similar to 1 mu m, so that defects were created at a faster rate in GaN compared to InGaN as alpha particles slowed and stopped within a minority carrier diffusion length of the quantum wells. However, the rate of luminescent decay was similar for both materials. Taken together with the cathodoluminescence data, this ion-beam induced luminescence comparison indicates that the quantum well luminescence decay rate is dominated by radiation-induced defects in the GaN epilayer. InGaN quantum wells are then demonstrated to be not more than a factor of ten more radiation sensitive than GaN, and may be substantially less sensitive than this upper bound.
C1 [Tringe, J. W.; Conway, A. M.; Felter, T. E.; Chan, W. J. Moberly; Lordi, V.; Stevens, C. G.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Castelaz, J.] Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA.
[Xia, Y.; Wetzel, C.] Rensselaer Polytech Inst, Dept Phys, Troy, NY 12180 USA.
RP Tringe, JW (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM tringe2@lln1.gov; castelaz@stanford.edu; wetzel@rpi.edu
RI Conway, Adam/C-3624-2009; Xia, Yong/I-6530-2013; Wetzel,
Christian/O-4017-2014;
OI Xia, Yong/0000-0003-3384-7155; Wetzel, Christian/0000-0002-6055-0990;
Lordi, Vincenzo/0000-0003-2415-4656
FU U.S. Department of Energy; Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]; DOE/NETL Solid-State Lighting Contract of Directed
Research [DE-FC26-06NT42860]
FX This work was supported by the U.S. Department of Energy by Lawrence
Livermore National Laboratory under Contract DE-AC52-07NA27344 and by
the DOE/NETL Solid-State Lighting Contract of Directed Research under
DE-FC26-06NT42860.
NR 13
TC 4
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U1 1
U2 6
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3633
EP 3637
DI 10.1109/TNS.2008.2006169
PG 5
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398EC
UT WOS:000262714400013
ER
PT J
AU Ziock, KP
Fabris, L
Carr, D
Collins, J
Cunningham, M
Habte, F
Karnowski, T
Marchant, W
AF Ziock, Klaus P.
Fabris, Lorenzo
Carr, Dennis
Collins, Jeff
Cunningham, Mark
Habte, Frezghi
Karnowski, Tom
Marchant, William
TI A Fieldable-Prototype, Large-Area, Gamma-Ray Imager for Orphan Source
Search
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Coded-aperture imager; gamma-ray detectors; gamma-ray imagers; nuclear
imaging; orphan source search
ID UNIFORMLY REDUNDANT ARRAYS; CODED-APERTURE; SENSITIVITY; DETECTOR
AB We have constructed a unique instrument for use in the search for orphan sources. The system uses gamma-ray imaging to "see through" the natural background variations that effectively limit the sensitivity of current devices. The imager is mounted in a 4.9-m-long trailer and can be towed by a large personal vehicle. Source locations are determined both in range and along the direction of travel as the vehicle moves. A fully inertial platform coupled to a global positioning system receiver is used to map the gamma-ray images onto overhead geospatial imagery. The resulting images provide precise source locations, allowing rapid follow-up work. The instrument simultaneously searches both sides of the street to a distance of 50 m (100-m swath) for millicurie-class sources with excellent performance as determined using source injection studies and Receiver-Operator-Characteristic techniques.
C1 [Ziock, Klaus P.; Fabris, Lorenzo; Cunningham, Mark; Karnowski, Tom] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Carr, Dennis; Collins, Jeff] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Marchant, William] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
RP Ziock, KP (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM ziockk@ornl.gov
RI Fabris, Lorenzo/E-4653-2013
OI Fabris, Lorenzo/0000-0001-5605-5615
FU Department of Homeland Security; Domestic Nuclear Detection Office; Oak
Ridge National Laboratory; UT-Battelle, LLC; U.S. Department of Energy
[DE-AC05-00OR22725]; Lawrence Livermore National Laboratory
[W-7405-Eng-48]
FX This work was supported by the Department of Homeland Security and
Domestic Nuclear Detection Office. Portions of the work were conducted
by the Oak Ridge National Laboratory, which is managed by UT-Battelle,
LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725.
Portions of this work were conducted under the auspices of the U.S.
Department of Energy by the University of California, Lawrence Livermore
National Laboratory, under Contract W-7405-Eng-48.
NR 19
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U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3643
EP 3653
DI 10.1109/TNS.2008.2006753
PG 11
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398EC
UT WOS:000262714400015
ER
PT J
AU Ziock, KP
Collins, J
Cunningham, M
Fabris, L
Gee, T
Goddard, J
Habte, F
Karnowski, T
AF Ziock, Klaus P.
Collins, Jeff
Cunningham, Mark
Fabris, Lorenzo
Gee, Timothy
Goddard, James
Habte, Frezghi
Karnowski, Thomas
TI The Use of Gamma-Ray Imaging to Improve Portal Monitor Performance
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Coded-aperture imager; gamma-ray detectors; gamma-ray imagers; nuclear
imaging; radiation portal monitor
ID UNIFORMLY REDUNDANT ARRAYS; CODED-APERTURE; IMAGER
AB We have constructed a prototype, rapid-deployment portal monitor that uses visible-light and gamma-ray imaging to allow simultaneous monitoring of multiple lanes of traffic from the side of a roadway. Our Roadside Tracker uses automated target acquisition and tracking (TAT) software to identify and track vehicles in visible light images. The field of view of the visible camera overlaps with and is calibrated to that of a one-dimensional gamma-ray imager. The TAT code passes information on when vehicles enter and exit the system field of view and when they cross gamma-ray pixel boundaries. Based on this information, the gamma-ray imager "harvests" the gamma-ray data specific to each vehicle, integrating its radiation signature for the entire time that it is in the field of view. In this fashion we are able to generate vehicle-specific radiation signatures and avoid source confusion problems that plague nonimaging approaches to the same problem.
C1 [Ziock, Klaus P.; Cunningham, Mark; Fabris, Lorenzo; Gee, Timothy; Goddard, James; Habte, Frezghi; Karnowski, Thomas] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Collins, Jeff] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Ziock, KP (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM ziockk@ornl.gov
RI Fabris, Lorenzo/E-4653-2013
OI Fabris, Lorenzo/0000-0001-5605-5615
NR 20
TC 7
Z9 7
U1 0
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3654
EP 3664
DI 10.1109/TNS.2008.2007489
PG 11
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398EC
UT WOS:000262714400016
ER
PT J
AU Szelezniak, MA
Besson, A
Colledani, C
Dorokhov, A
Dulinski, W
Greiner, LC
Himmi, A
Hu, C
Matis, HS
Ritter, HG
Rose, AA
Shabetai, A
Stezelberger, T
Sun, XM
Thomas, JH
Valin, I
Vu, CQ
Wieman, HH
Winter, M
AF Szelezniak, Michal A.
Besson, Auguste
Colledani, Claude
Dorokhov, Andrei
Dulinski, Wojciech
Greiner, Leo C.
Himmi, Abdelkader
Hu, Christine
Matis, Howard S.
Ritter, Hans Georg
Rose, Andrew A.
Shabetai, Alexandre
Stezelberger, Thorsten
Sun, Xiangming
Thomas, Jim H.
Valin, Isabelle
Vu, Chinh Q.
Wieman, Howard H.
Winter, Marc
TI Small-Scale Readout System Prototype for the STAR PIXEL Detector
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Cluster finding algorithm; complementary metal-oxide (CMOS) detectors;
detector readout; silicon detectors
ID SENSORS; TRACKING; PERFORMANCE; PROJECT
AB A prototype readout system for the STAR PIXEL detector in the Heavy Flavor Tracker (HFT) vertex detector upgrade is presented. The PIXEL detector is a Monolithic Active Pixel Sensor (MAPS) based silicon pixel vertex detector fabricated in a commercial CMOS process that integrates the detector and front-end electronics layers in one silicon die. Two generations of MAPS prototypes designed specifically for the PIXEL are discussed. We have constructed a prototype telescope system consisting of three small MAPS sensors arranged in three parallel and coaxial planes with a readout system based on the readout architecture for PIXEL. This proposed readout architecture is simple and scales to the size required to readout the final detector. The real-time hit finding algorithm necessary for data rate reduction in the 400 million pixel detector is described, and aspects of the PIXEL system integration into the existing STAR framework are addressed. The complete system has been recently tested and shown to be fully functional.
C1 [Szelezniak, Michal A.; Greiner, Leo C.; Matis, Howard S.; Ritter, Hans Georg; Rose, Andrew A.; Stezelberger, Thorsten; Sun, Xiangming; Thomas, Jim H.; Vu, Chinh Q.; Wieman, Howard H.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Besson, Auguste; Colledani, Claude; Dorokhov, Andrei; Dulinski, Wojciech; Himmi, Abdelkader; Hu, Christine; Shabetai, Alexandre; Valin, Isabelle; Winter, Marc] Inst Pluridisciplinaire Hubert Curien, F-670037 Strasbourg, France.
RP Szelezniak, MA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM MASzelezniak@lbl.gov; Auguste.Besson@ires.in2p3.fr;
Claude.Colledani@ires.in2p3.fr; Andrei.Dorokhov@ires.in2p3.fr;
Wojciech.Dulinski@ires.in2p3.fr; LCGreiner@lbl.gov;
Abdelkader.Himmi@ires.in2p3.fr; Christine.Hu@ires.in2p3.fr;
HSMatis@lbl.gov; HGRitter@lbl.gov; AARose@lbl.gov;
Alexandre.Shabetai@ires.in2p3.fr; TStezelberger@lbl.gov; XSun@lbi.gov;
JHThomas@lbl.gov; Isabelle.Valin@ires.in2p3.fr; CQVu@lbl.gov;
HHWieman@lbl.gov; Marc.Winter@ires.in2p3.fr
OI Thomas, James/0000-0002-6256-4536
FU U.S. Department of Energy [DE-AC02-05CH11231]
FX This work wag supported by the U.S. Department of Energy under Contract
No. DE-AC02-05CH11231, Office of Nuclear Physics.
NR 21
TC 3
Z9 3
U1 0
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3665
EP 3672
DI 10.1109/TNS.2008.2006681
PN 2
PG 8
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398EC
UT WOS:000262714400017
ER
PT J
AU Wisniewski, D
Boatner, LA
Ramey, JO
Wisniewska, M
Neal, JS
Jellison, GE
AF Wisniewski, Dariusz
Boatner, Lynn A.
Ramey, Joanne O.
Wisniewska, Monika
Neal, John S.
Jellison, Gerald E.
TI Exploratory Research on the Development of Novel Ce3+-Activated
Phosphate Glass Scintillators
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Gamma-ray detectors; glass scintillators; neutron detectors; X-ray
detectors
ID LEAD-INDIUM PHOSPHATE; NEUTRON; TEMPERATURE; LUALO3-CE; CAF2
AB We report the discovery of a new family of Ce3(+)-activated phosphate glass scintillators that can be formed either with or without the addition of Li-6, for neutron or X-ray/gamma-ray radiation detection, respectively. Trivalent cerium can be efficiently introduced into these phosphate glasses in surprisingly high concentrations in the form of anhydrous cerium tri-chloride. Additionally, these glasses can be melted and poured at the relatively low temperatures of 1000-1050 degrees C (i.e., substantially lower than silicate glasses), and to retain the cerium in the trivalent state it is not necessary to maintain highly reducing conditions during the synthesis process. The family of alkaline-earth-alkali phosphate glasses investigated here represents a system with two dissimilar cations-thereby offering a large range of potential compositional variations, substitutions, and combinations. In order to alter the scintillator characteristics, we have explored part of that compositional space by studying Ca-Na, Ca-Li, Ca-Cs, Ca-Rb, Ca-K and Ca-Ba-Na phosphate glasses, as well as various co-doping and post-synthesis thermal processing schemes. A series of experiments under x ray, gamma ray, and neutron excitations was carried out. The broad, peaking at about 354 nm, UV scintillation of these glasses is well suited for applications that use common photomultipliers with bi-alkali photo-cathodes. Pulse shape measurements show that the primary component of the scintillation in most of these glasses corresponds to 75-90% of the emitted photons, and it decays with a time constant of 30 to 40 ns, which classifies these materials as reasonably fast scintillators. Although the gamma-induced light yield of these new scintillating phosphate glasses is, thus far, only about 30% of that of commercial GS20 silicate glass, due to the generally faster scintillation, the initial amplitude of the scintillation pulse of these glasses is close to that of the above-mentioned GS20 scintillator.
C1 [Wisniewski, Dariusz; Boatner, Lynn A.; Ramey, Joanne O.; Wisniewska, Monika; Neal, John S.; Jellison, Gerald E.] Oak Ridge Natl Lab, Ctr Radiat Detect Mat & Syst, Oak Ridge, TN 37831 USA.
RP Wisniewski, D (reprint author), Oak Ridge Natl Lab, Ctr Radiat Detect Mat & Syst, Oak Ridge, TN 37831 USA.
EM wisniewskidj.@ornl.gov; boatnerla@ornl.gov; rameyjo@ornl.gov;
wisniewskamn@ornl.gov; nealjs@ornl.gov; jellisongejr@ornl.gov
RI Boatner, Lynn/I-6428-2013; Neal, John/R-8203-2016
OI Boatner, Lynn/0000-0002-0235-7594; Neal, John/0000-0001-8337-5235
FU NNSA Office of Nonproliferation Research and Engineering [NA-22]; USDOE;
U.S. Department of Energy [DE-AC05-00OR22725]
FX The research was carried out in the Center for Radiation Detection
Materials and Systems at ORNL and is supported in part by the NNSA
Office of Nonproliferation Research and Engineering (NA-22). USDOE and
in part by the Department of Homeland Security, Domestic Nuclear
Detection Office. ORNL is operated by UT-Battelle. LLC for the U.S.
Department of Energy under Contract No. DE-AC05-00OR22725.
NR 33
TC 10
Z9 11
U1 3
U2 20
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
EI 1558-1578
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3692
EP 3702
DI 10.1109/TNS.2008.2007567
PN 2
PG 11
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398EC
UT WOS:000262714400020
ER
PT J
AU Camarda, GS
Bolotnikov, AE
Cui, YG
Hossain, A
Awadalla, SA
MacKenzie, J
Chen, H
James, RB
AF Camarda, Giuseppe S.
Bolotnikov, Aleksey E.
Cui, Yonggang
Hossain, Anwar
Awadalla, Salah A.
MacKenzie, J.
Chen, Henry
James, Ralph B.
TI Polarization Studies of CdZnTe Detectors Using Synchrotron X-Ray
Radiation
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE CdZnTE; X-ray Diffraction Topography (XDT); National Synchrotron Light
Source (NSLS); polarization; WXDT; X27B
AB High densities of impurities and defects lead to severe charge-carrier trapping that can be major issues in assuring the high performance of CZT detectors. For some medical-imaging applications, the typical X-ray flux can be very high. Under such high irradiation conditions, the trapped charge builds up inside the detector affecting its stability. This phenomenon generally is termed the polarization effect. We conducted detailed studies on polarization in CZT crystals employing a highly collimated synchrotron X-ray radiation source available at Brookhaven's National Synchrotron Light Source (NSLS). We were able to induce polarization effects by irradiating specific areas within the detector. These measurements allowed us to make, for the first time, a quantitative comparison between areas where polarization is induced, and the electron- and hole-collection X-ray maps obtained at low flux, where no polarization is induced. We discuss the results of these polarization studies.
C1 [Camarda, Giuseppe S.; Bolotnikov, Aleksey E.; Cui, Yonggang; Hossain, Anwar; James, Ralph B.] Brookhaven Natl Lab, Upton, NY 11793 USA.
[Awadalla, Salah A.; MacKenzie, J.; Chen, Henry] Redlen Technol, Sidney, BC V8L 5Y8, Canada.
RP Camarda, GS (reprint author), Brookhaven Natl Lab, Upton, NY 11793 USA.
EM giuseppec@bnl.gov; bolotnik@bnl.gov; ycui@bnl.gov; hossain@bnl.gov;
salah.awadalla@redlen.com; jasonmac@uvic.ca; henry.chen@redlen.com;
rjames@bnl.gov
FU U.S. Department of Energy [NA-22]; Brookhaven Science Associates, LLC
[DE-AC02-98CH1-886]
FX This work was supported by the U.S. Department of Energy, Office of
Nonproliferation Research and Engineering, NA-22. The manuscript has
been authored by Brookhaven Science Associates, LLC under Contract No.
DE-AC02-98CH1-886 with the U.S. Department of Energy.
NR 7
TC 14
Z9 15
U1 1
U2 10
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3725
EP 3730
DI 10.1109/TNS.2008.2004707
PG 6
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398EC
UT WOS:000262714400024
ER
PT J
AU Mathes, M
Cristinziani, M
Da Via, C
Garcia-Sciveres, M
Einsweiler, K
Hasi, J
Kenney, C
Parker, SI
Reuen, L
Ruspa, M
Velthuis, J
Watts, S
Wermes, N
AF Mathes, Markus
Cristinziani, M.
Da Via, C.
Garcia-Sciveres, M.
Einsweiler, K.
Hasi, J.
Kenney, C.
Parker, S. I.
Reuen, L.
Ruspa, M.
Velthuis, J.
Watts, S.
Wermes, Norbert
TI Test Beam Characterization of 3-D Silicon Pixel Detectors
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Pixel detectors; silicon radiation detectors; vertex detectors
ID SENSORS; 3D
AB Three-dimensional (3-D) silicon detectors are characterized by cylindrical electrodes perpendicular to the surface and penetrate into the bulk material in contrast to standard Si detectors with planar electrodes on the top and bottom. This geometry renders them particularly interesting to be used in environments where standard silicon detectors have limitations, such as, for example, the radiation environment expected in an upgrade to the Large Hadron Collider at CERN. For the first time, several 3-D sensors were assembled as hybrid pixel detectors using the ATLAS-pixel front-end chip and readout electronics. Devices with different electrode configurations have been characterized in a 100 GeV pion beam at the CERN SPS. Here, we report results on unirradiated devices with three 3-D electrodes per 50 x 400 mu m(2) pixel area. Full charge collection is obtained already with comparatively low bias voltages around 10 V. Spatial resolution with binary readout is obtained as expected from the cell dimensions. Efficiencies of 95.9%+/- 0.1% for tracks incident parallel to the electrodes and of 99.9%+/- 0.1% for tracks incident at 15 degrees are measured. The homogeneity and charge sharing of the efficiency over the pixel area are measured.
C1 [Mathes, Markus; Cristinziani, M.; Reuen, L.; Wermes, Norbert] Univ Bonn, Inst Phys, D-53115 Bonn, Germany.
[Da Via, C.; Hasi, J.; Watts, S.] Univ Manchester, Manchester M13 9PL, Lancs, England.
[Parker, S. I.] Univ Hawaii, Honolulu, HI 96822 USA.
[Ruspa, M.] Univ Piemonte Orientale, Novara, Italy.
[Ruspa, M.] Inst Nazl Fis, I-10125 Turin, Italy.
[Kenney, C.] Mol Biol Consortium, Chicago, IL 60612 USA.
[Garcia-Sciveres, M.; Einsweiler, K.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Mathes, M (reprint author), Univ Bonn, Inst Phys, D-53115 Bonn, Germany.
EM mathes@physik.uni-bonn.de; wermes@uni-bonn.de
FU German Ministerium fur Bildung, Wissenschaft, Forschung und Technologie
(BMBF) [06 HA6PD1]; U.S. Department of Energy Office of Science
[DE-AC02-05CH11231]
FX This work was supported by the German Ministerium fur Bildung,
Wissenschaft, Forschung und Technologie (BMBF) under Contract no. 06
HA6PD1 and in part by the U.S. Department of Energy Office of Science
under Contract No. DE-AC02-05CH11231..
NR 14
TC 12
Z9 12
U1 1
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3731
EP 3735
DI 10.1109/TNS.2008.2005630
PN 2
PG 5
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398EC
UT WOS:000262714400025
ER
PT J
AU Battaglia, M
Bussat, JM
Contarato, D
Denes, P
Giubilato, P
Glesener, LE
AF Battaglia, Marco
Bussat, Jean-Marie
Contarato, Devis
Denes, Peter
Giubilato, Piero
Glesener, Lindsay E.
TI Development of CMOS Monolithic Pixel Sensors With In-Pixel Correlated
Double Sampling and Fast Readout
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Monolithic Si pixel sensors
ID BEAM; SIMULATION; ILC
AB This paper presents the design and results of detailed tests of a CMOS active pixel chip for charged particle detection with in-pixel charge storage for correlated double sampling and readout in rolling shutter mode at frequencies up to 25 MHz. This detector is developed in the framework of R&D for the Vertex Tracker for a future e(+)e(-) Linear Collider.
C1 [Battaglia, Marco; Glesener, Lindsay E.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94729 USA.
[Battaglia, Marco; Bussat, Jean-Marie; Contarato, Devis; Denes, Peter; Glesener, Lindsay E.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Giubilato, Piero] Ist Nazl Fis Nucl, Sez Padova, Padua, Italy.
RP Battaglia, M (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94729 USA.
EM mbattaglia@lbl.gov
OI Giubilato, Piero/0000-0003-4358-5355
FU U.S. Department of Energy [DE-AC02-05CH11231]
FX This work was supported by the Director, Office of Science, of the U.S.
Department of Energy under Contract DE-AC02-05CH11231.
NR 8
TC 4
Z9 4
U1 0
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2008
VL 55
IS 6
BP 3746
EP 3750
DI 10.1109/TNS.2008.2007484
PG 5
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 398EC
UT WOS:000262714400028
ER
PT J
AU Renneke, RM
Rosocha, LA
Kim, Y
AF Renneke, Richard M.
Rosocha, Louis A.
Kim, Yongho
TI Temperature Effects on Gaseous Fuel Cracking Studies Using a Dielectric
Barrier Discharge
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Article
DE Glow discharge devices; glow discharges; plasma applications
ID HYDROCARBONS
AB Fuel cracking using a plasma is one of the methods to enhance combustion by forming lighter hydrocarbons and hydrogen from heavier ones. Lighter hydrocarbons and hydrogen burn more cleanly and under much leaner burn conditions, thereby increasing combustion stability and producing less pollution (particularly oxides of nitrogen-NO(x)). The cracked fuel fragments are also expected to efficiently burn more, and thus, more energy can possibly be extracted from the fuel. Fuel cracking is accomplished at Los Alamos National Laboratory by using an ac annular dielectric barrier discharge (also called a silent electrical discharge). This forms a nonthermal plasma between the barrier (a ceramic tube) and the central electrode, which is typically charged to 5-10 W The nonthermal plasma is relatively cold, since electrons carry most of the energy and the ions and neutrals remain at approximately ambient temperature. Our experiments show that increased temperature inside the reactor elevates the stable concentration of CH(4) (methane), C(2)H(2) (acetylene), C(2)H(4) (ethylene), and C(3)H(8) (propane) from a C(2)H(6) (ethane) parent gas. The ac waveform was used to heat the dielectric barrier, which in turn heated the nonthermal plasma in the reactor. Results of these experiments were compared to a KINEMA model of ethane plasma chemistry. The model predicts the same global trends as the experimental data. This modeling shows that certain radical-forming reactions, and direct pathways for H(2), CH(4), and C(3)H(8), have enhanced reaction rates at higher temperatures compared to the ambient case.
C1 [Renneke, Richard M.; Rosocha, Louis A.; Kim, Yongho] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Renneke, RM (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
NR 9
TC 7
Z9 8
U1 2
U2 8
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0093-3813
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD DEC
PY 2008
VL 36
IS 6
BP 2905
EP 2908
DI 10.1109/TPS.2008.2003193
PG 4
WC Physics, Fluids & Plasmas
SC Physics
GA 389AK
UT WOS:000262061900005
ER
PT J
AU Wang, H
Wereszczak, AA
AF Wang, Hong
Wereszczak, Andrew A.
TI Effects of Electric Field and Biaxial Flexure on the Failure of Poled
Lead Zirconate Titanate
SO IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
LA English
DT Article
ID GRAIN-SIZE DEPENDENCE; FRACTURE-TOUGHNESS; FERROELECTRIC CERAMICS;
PIEZOELECTRIC CERAMICS; MULTILAYER ACTUATORS; VICKERS INDENTATION;
CRACK-GROWTH; STRENGTH; BEHAVIOR; BATIO3
AB Reliable design of lead zirconate titanate (PZT) piezo stack actuators demands that several issues, including electromechanical coupling and ceramic strength-size scaling, be scrutinized. This study addresses those through the use of ball-on-ring (BoR) biaxial flexure strength tests of a PZT piezoelectric material that is concurrently subjected to an electric field. The Weibull strength distributions and fracture surfaces were examined, The mechanical failures were further analyzed in terms of internal stress, energy release rate, and domain-switching toughening. Both the sign and the magnitude of an electric field had a significant effect oil the strength of poled PZT within the tested range. A surface flaw type with an average depth of around 18 mu m was identified to be the strength limiter and responsible for the failure of the tested PZT under both mechanical and electromechanical loadings. With a value of 0.74 MPa.m(1/2) in the absence of electric field, the fracture toughness of the poled PZT was affected by an applied electric field just as the strength was affected. These results and observations have the potential to serve probabilistic reliability analysis and design optimization of multilayer PZT piezo actuators.
C1 [Wang, Hong; Wereszczak, Andrew A.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Ceram Sci & Technol Grp, Oak Ridge, TN 37831 USA.
RP Wang, H (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Ceram Sci & Technol Grp, Oak Ridge, TN 37831 USA.
EM wangh@ornl.gov
RI Wereszczak, Andrew/I-7310-2016; Wang, Hong/O-1987-2016
OI Wereszczak, Andrew/0000-0002-8344-092X; Wang, Hong/0000-0002-0173-0545
FU U.S, Department of Energy (DOE) [DE-AC05-00OR22725]
FX This research was sponsored by the U.S, Department of Energy (DOE),
Office of Freedom CAR. and Vehicle Technologies, as a part of the Heavy
Vehicle Propulsion System Materials Program, under contract
DE-AC05-00OR22725 with UT-Battelle, LLC. The work was supported in part
by an appointment to the Oak Ridge National Laboratory Postdoctoral
Research Associates Program, sponsored by the U.S. DOE and administered
by the Oak Ridge Institute for Science and Education.
NR 52
TC 11
Z9 12
U1 2
U2 10
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0885-3010
J9 IEEE T ULTRASON FERR
JI IEEE Trans. Ultrason. Ferroelectr. Freq. Control
PD DEC
PY 2008
VL 55
IS 12
BP 2559
EP 2570
DI 10.1109/TUFFC.2008.972
PG 12
WC Acoustics; Engineering, Electrical & Electronic
SC Acoustics; Engineering
GA 391GM
UT WOS:000262221800004
PM 19126481
ER
PT J
AU Chartrand, R
Staneva, V
AF Chartrand, R.
Staneva, V.
TI Total variation regularisation of images corrupted by non-Gaussian noise
using a quasi-Newton method
SO IET IMAGE PROCESSING
LA English
DT Article
ID OUTLIERS
AB The aim is to obtain efficient algorithms for image regularisation optimised for removing different types of noise. One can accomplish this by combining total variation regularisation with a noise-specific way to measure the fidelity between the noisy and the denoised images. To obtain a minimum of the resulting functional, a quasi-Newton method is proposed, which converges faster than the commonly used method of gradient descent. A unified algorithmic and theoretical framework for a general class of data-fidelity terms is presented. As examples, we consider Poisson noise and impulse noise.
C1 [Chartrand, R.; Staneva, V.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Chartrand, R (reprint author), Los Alamos Natl Lab, Div Theoret, MS B284, Los Alamos, NM 87545 USA.
EM rickc@lanl.gov
OI Staneva, Valentina/0000-0002-3412-0364
NR 15
TC 12
Z9 12
U1 2
U2 5
PU INST ENGINEERING TECHNOLOGY-IET
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
SN 1751-9659
J9 IET IMAGE PROCESS
JI IET Image Process.
PD DEC
PY 2008
VL 2
IS 6
BP 295
EP 303
DI 10.1049/iet-ipr:20080017
PG 9
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
Electronic; Imaging Science & Photographic Technology
SC Computer Science; Engineering; Imaging Science & Photographic Technology
GA 380YM
UT WOS:000261502000003
ER
PT J
AU Reynolds, J
Marshall, D
Shaw, S
Gelinas, RE
Cook, HT
Pusey, CD
AF Reynolds, J.
Marshall, D.
Shaw, S.
Gelinas, R. E.
Cook, H. T.
Pusey, C. D.
TI Effect of anti-IL6 monoclonal antibody therapy in experimental
autoimmune glomerulonephritis in the CD1 mouse
SO IMMUNOLOGY
LA English
DT Meeting Abstract
CT Annual Congress of the British-Society-of-Immunology
CY NOV 17-21, 2008
CL Glasgow, SCOTLAND
SP British Soc Immunol
C1 [Reynolds, J.; Pusey, C. D.] Univ London Imperial Coll Sci Technol & Med, Div Med, Renal Sect, London SW7 2AZ, England.
[Marshall, D.; Shaw, S.] UCB Celltech, Slough, Berks, England.
[Gelinas, R. E.] Battelle Seattle Res Ctr, Seattle, WA USA.
[Cook, H. T.] Univ London Imperial Coll Sci Technol & Med, Dept Histopathol, London SW7 2AZ, England.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL PUBLISHING, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0019-2805
J9 IMMUNOLOGY
JI Immunology
PD DEC
PY 2008
VL 125
BP 60
EP 60
PG 1
WC Immunology
SC Immunology
GA 398XL
UT WOS:000262764800192
ER
PT J
AU Marques-Gallego, P
den Dulk, H
Brouwer, J
Kooijman, H
Spek, AL
Roubeau, O
Teat, SJ
Reedijk, J
AF Marques-Gallego, Patricia
den Dulk, Hans
Brouwer, Jaap
Kooijman, Huub
Spek, Anthony L.
Roubeau, Olivier
Teat, Simon J.
Reedijk, Jan
TI Synthesis, Crystal Structure, Studies in Solution and Cytotoxicity of
Two New Fluorescent Platinum(II) Compounds Containing Anthracene
Derivatives as a Carrier Ligand
SO INORGANIC CHEMISTRY
LA English
DT Article
ID OVARIAN-CARCINOMA CELLS; AQUEOUS-SOLUTION; SULFOXIDE COMPLEXES;
ANTICANCER DRUGS; LINKING LIGANDS; CIS-INFLUENCE; CISPLATIN;
CARBOPLATIN; N,N'-BIS(AMINOALKYL)-1,4-DIAMINOANTHRAQUINONES; MICROSCOPY
AB Two new cytotoxic fluorescent platinum(II) compounds, cis-[Pt(A9opy)Cl(2)] (1) and cis-[Pt(A9pyp)(DMSO)Cl(2)] (2), have been designed, synthesized, and characterized by IR, (1)H NMR, and (195)Pt NMR spectroscopy; electrospray ionization mass spectrometry (ESI-MS); and single-crystal X-ray diffraction. The carrier ligands selected for the synthesis of these fluorescent platinum(II) compounds are E-2-[1-(9-anthryl)-3-oxo-3-prop-2-enylpyridine) (abbreviated as A9opy) and E-1-(9-anthryl)-3-(2-pyridyl)-2-propenone (abbreviated as A9pyp). The compound cis-[Pt(A9opy)Cl(2)] (1) comprises a peculiar cis-platinum(II) organometallic compound, in which the platinum(II) ion is bound to the photoisomerizable carbon-carbon double bond of the carrier ligand. The effects of the metal-ion coordination on the photoisomerization of the carbon-carbon double bond of the ligand have been studied. In contrast, the carrier ligand A9pyp used for the synthesis of the cis-[Pt(A9pyp)(DMSO)Cl(2)] compound (2) does not undergo such an isomerization process and remains in the E conformation, while coordinated to the platinum(II) ion through the nitrogen of the pyridine ring. In addition to the synthesis and characterization, solution studies of both compounds have also been performed in detail, including NMR and ESI-MS spectroscopy. Moreover, a high degree of cytotoxic activity of compound 1 was found, as compared to cisplatin and its corresponding platinum-free molecule, in a series of human tumor cell lines. Compound 2 was also found to be highly active against these cell lines but appeared less active compared to the platinum-free molecule.
C1 [Marques-Gallego, Patricia; den Dulk, Hans; Brouwer, Jaap; Reedijk, Jan] Leiden Univ, Leiden Inst Chem, Gorlaeus Labs, NL-2300 RA Leiden, Netherlands.
[Kooijman, Huub; Spek, Anthony L.] Univ Utrecht, Bijvoet Ctr Biomol Res, NL-3584 CH Utrecht, Netherlands.
[Roubeau, Olivier] Univ Bordeaux 1, CNRS, CRPP, UPR 8641, F-33600 Pessac, France.
[Teat, Simon J.] Lawrence Berkeley Lab, ALS, Berkeley, CA 94720 USA.
RP Reedijk, J (reprint author), Leiden Univ, Leiden Inst Chem, Gorlaeus Labs, POB 9502, NL-2300 RA Leiden, Netherlands.
EM reedijk@chem.leidenuniv.nl
RI Roubeau, Olivier/A-6839-2010; Reedijk, Jan/F-1992-2010; Marques Gallego,
Patricia/A-6191-2014
OI Roubeau, Olivier/0000-0003-2095-5843; Reedijk, Jan/0000-0002-6739-8514;
Marques Gallego, Patricia/0000-0002-5496-9103
FU COST Actions [D39/0006/02, D39/0005/11]
FX The support and sponsorship concerted by COST Actions D39/0006/02 and
D39/0005/11 is kindly acknowledged. The authors thank Johnson & Matthey
(Reading, U.K.) for their generous loan of K2PtCl4. The
cytotoxicity test of the compounds was generously supported by PCN
(Tava-pharmachemie) Nederland. For the crystal data collection of
compound 2, we acknowledge Dr. Patrick Gamez and Dr. Guillem Aromi. Dr.
Stefania Grecea is acknowledged for stimulating discussions. Fons
Lefeber, Jos van Brussel, John APP van Dijk, and Jopie A.
Erkelens-Duijndam are acknowledged for assistance with the NMR
techniques; for the C, H, and N analyses; and for the ESI-MS
determinations, respectively. Both A2780 cell lines were kindly provided
by Prof. Dr. Carmen Navarro-Ranninger (Universidad Autonoma de Madrid,
Spain).
NR 55
TC 35
Z9 35
U1 2
U2 16
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 DEC 1
PY 2008
VL 47
IS 23
BP 11171
EP 11179
DI 10.1021/ic8014767
PG 9
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 375VW
UT WOS:000261142900044
PM 18975941
ER
PT J
AU Boro, BJ
Duesler, EN
Goldberg, KI
Kemp, RA
AF Boro, Brian J.
Duesler, Eileen N.
Goldberg, Karen I.
Kemp, Richard A.
TI An unprecedented bonding mode for potassium within a PCP-pincer
palladium hydride-K-Selectride (R) complex
SO INORGANIC CHEMISTRY COMMUNICATIONS
LA English
DT Article
DE Tridentate ligands; Pd complexes; Crystal structure; Hydride ligands
ID ALKANE DEHYDROGENATION; MOLECULAR-OXYGEN; INSERTION; LIGANDS; CATALYSIS;
TRANSFORMATIONS; REACTIVITY; MECHANISM; PLATINUM
AB The reaction of (PCP)(i-Pr)PdCl and the commonly-used reductant K-Selectride (R) solution [K(sec-Bu(3)BH) in THF] does not yield a simple (PCP)(i-Pr)PdH species, but rather an adduct of the Pd-H that contains bound K(sec-Bu(3)BH). This adduct has been characterized by X-ray crystallography and shown to be a centrosymmetric dimer in the solid state. The most unique feature of the structure is that the tri-coordinate K(+) ion bonds only to the terminal palladium hydride and the two bridging boron hydrides. Despite being prepared in THF, no other donor ligands are bound to K(+). This [H(3)K](+) bonding mode for K(+) ions has not been previously reported. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Boro, Brian J.; Duesler, Eileen N.; Kemp, Richard A.] Univ New Mexico, Dept Chem & Biol Chem, Albuquerque, NM 87131 USA.
[Goldberg, Karen I.] Univ Washington, Dept Chem, Seattle, WA 98195 USA.
[Kemp, Richard A.] Sandia Natl Labs, Adv Mat Lab, Albuquerque, NM 87106 USA.
RP Kemp, RA (reprint author), Univ New Mexico, Dept Chem & Biol Chem, Albuquerque, NM 87131 USA.
EM rakemp@unm.edu
FU Department of Energy [DE-FG02-06ER15765]; National Science Foundation
CRIF:MU award to the University of New Mexico [CHE-0443580];
[DE-AC04-94AL85000]
FX This work was supported by the Department of Energy (DE-FG02-06ER15765).
The Bruker X-ray diffractometer was purchased via a National Science
Foundation CRIF:MU award to the University of New Mexico (CHE-0443580).
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. We also thank Dr. Diane A. Dickie
of our UNM research group for useful discussions regarding the crystal
structure.
NR 31
TC 8
Z9 8
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1387-7003
J9 INORG CHEM COMMUN
JI Inorg. Chem. Commun.
PD DEC
PY 2008
VL 11
IS 12
BP 1426
EP 1429
DI 10.1016/j.inoche.2008.09.021
PG 4
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 386CG
UT WOS:000261859300003
ER
PT J
AU Salve, R
Krakauer, NY
Kowalsky, MB
Finsterle, S
AF Salve, Rohit
Krakauer, Nir Y.
Kowalsky, Michael B.
Finsterle, Stefan
TI A qualitative assessment of microclimatic perturbations in a tunnel
SO INTERNATIONAL JOURNAL OF CLIMATOLOGY
LA English
DT Article
DE condensation; evaporation; fractured rock; microclimate; monitoring
techniques; tunnels
ID CAVE
AB Understanding microclimate dynamics in tunnels is important for designing, operating, and maintaining underground facilities. For example, for the geological disposal of radioactive materials, condensation of vapour should be minimized as liquid water call accelerate waste package corrosion and radionuclide release. While microclimate dynamics are known to be dominated by the advection of heal and Moisture, additional factors may also be important, Such as the presence of fractures or faults. We present data collected using I relatively inexpensive method that is under development to assess microclimatic perturbations underground. By combining standard temperature and relative humidity sensors with low-cost sensors designed to detect changes in water content, we were able to infer microclimate dynamics along a tunnel at the proposed geological repository at. Yucca Mountain, Nevada. We observed significant differences in the pattern of condensation in it faulted Zone relative to that of a non-faulted zone, suggesting that hydrogeologic features have to be accounted for when evaluating the microclimate dynamics of excavated cavities in fractured, partially saturated rocks. Published in 2008 by John Wiley & Soils, Ltd.
C1 [Salve, Rohit; Kowalsky, Michael B.; Finsterle, Stefan] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
[Krakauer, Nir Y.] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
RP Salve, R (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, 1 Cyclotron Rd,MS-1116, Berkeley, CA 94720 USA.
EM R_Salve@lbl.gov
RI Finsterle, Stefan/A-8360-2009
OI Finsterle, Stefan/0000-0002-4446-9906
FU U.S. Department of Energy [QA-B004220RB3X, DE-AC03]; Ernest Orlando
Lawrence Berkeley National Laboratory; National Oceanic and Atmospheric
Administration Climate and Global Change
FX This work was supported by the Director, Office of Civilian Radioactive
Waste Management, U.S. Department of Energy, through Memorandum Purchase
Order QA-B004220RB3X between Bechtel SAIC Company, LLC, and the Ernest
Orlando Lawrence Berkeley National Laboratory (Berkeley Lab). The
support is provided to Berkeley Lab through the U.S. Department of
Energy Contract No. DE-AC03. NYK was Supported by a National Oceanic and
Atmospheric Administration Climate and Global Change Postdoctoral
Fellowship. Reviews by Paul Cook and Dan Hawkes are gratefully
acknowledged.
NR 11
TC 2
Z9 2
U1 0
U2 2
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0899-8418
J9 INT J CLIMATOL
JI Int. J. Climatol.
PD DEC
PY 2008
VL 28
IS 15
BP 2081
EP U3
DI 10.1002/joc.1697
PG 7
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 385JO
UT WOS:000261810700006
ER
PT J
AU Robinett, RD
Wilson, DG
AF Robinett, Rush D., III
Wilson, David G.
TI What is a limit cycle?
SO INTERNATIONAL JOURNAL OF CONTROL
LA English
DT Article
DE Hamiltonian mechanics; limit cycle; non-linear systems
ID NONLINEARITY; BEHAVIOR; AIRFOIL
AB A limit cycle is the stability boundary for linear and non-linear control systems. Hamiltonian mechanics and power flow control are employed to demonstrate this property of limit cycles. The presentation begins with the concept of linear limit cycles which is extended to non-linear limit cycles. Many examples are used to demonstrate these concepts including linear and non-linear oscillators, power engineering, and an extension to a class of plane differential systems. Power flow control based on Hamiltonian mechanics is shown to be applicable to a large class of non-linear systems. Finally, eigenanalysis and flight stability for linear systems are extended to non-linear systems and is referred to as 'the power flow principle of stability for non-linear systems'.
C1 [Robinett, Rush D., III; Wilson, David G.] Sandia Natl Labs, Energy Resources & Syst Anal Ctr, Albuquerque, NM 87185 USA.
RP Wilson, DG (reprint author), Sandia Natl Labs, Energy Resources & Syst Anal Ctr, POB 5800, Albuquerque, NM 87185 USA.
EM dwilso@sandia.gov
FU Sandia National Laboratories; Sandia Corporation; Lockheed Martin
Company; U.S. Department of Energy's National Nuclear Security
Administration [DE-AC04-94AL85000]
FX Sandia National Laboratories is a multiprogram laboratory operated by
Sandia Corporation, a Lockheed Martin Company, for the U.S. Department
of Energy's National Nuclear Security Administration under contract
DE-AC04-94AL85000.
NR 20
TC 9
Z9 9
U1 0
U2 2
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0020-7179
J9 INT J CONTROL
JI Int. J. Control
PD DEC
PY 2008
VL 81
IS 12
BP 1886
EP 1900
DI 10.1080/00207170801927163
PG 15
WC Automation & Control Systems
SC Automation & Control Systems
GA 399TL
UT WOS:000262822100006
ER
PT J
AU Teh, KY
Miller, SL
Edwards, CF
AF Teh, K-Y
Miller, S. L.
Edwards, C. F.
TI Thermodynamic requirements for maximum internal combustion engine cycle
efficiency. Part 1: optimal combustion strategy
SO INTERNATIONAL JOURNAL OF ENGINE RESEARCH
LA English
DT Article
DE combustion; entropy generation; exergy destruction; internal combustion
engine efficiency; optimal engine cycle; thermodynamics
ID AVAILABILITY EXERGY; DESTRUCTION
AB This is the first of a two-part study that examines, from the exergy management standpoint, the fundamental thermodynamic requirements for maximizing internal combustion (IC) engine cycle efficiency. The optimal cycle is shown to comprise three distinct engine architectural elements - reactant preparation, combustion, and work extraction from the products - each of which can be analysed separately. This study shows, based on dynamical system optimization, that it is the equilibrium thermodynamics (specifically, the constant-internal energy-volume (UV) product state at the end of combustion) and not chemical kinetics (i.e. reactions taking place during combustion) that ultimately dictates the amount of exergy destroyed due to combustion. The strategy for minimizing this destruction term reduces to carrying out reactions at the highest possible internal energy state - following what may be called the 'extreme state' principle - so as to minimize the corresponding constant-UV entropy change from reactants to equilibrium products. The extreme state principle remains unaltered when system inhomogeneity (from fuel vaporization and mixing with air) and heat loss are accounted for. Based on this optimal combustion strategy, the companion paper examines the remaining elements of the engine cycle (reactant preparation and work extraction) so as to improve overall cycle efficiency.
C1 [Teh, K-Y; Miller, S. L.; Edwards, C. F.] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA.
RP Teh, KY (reprint author), Sandia Natl Labs, Combust Res Facil, POB 969,MS9052, Livermore, CA 94551 USA.
EM kteh@sandia.gov
NR 26
TC 32
Z9 33
U1 0
U2 11
PU PROFESSIONAL ENGINEERING PUBLISHING LTD
PI WESTMINISTER
PA 1 BIRDCAGE WALK, WESTMINISTER SW1H 9JJ, ENGLAND
SN 1468-0874
J9 INT J ENGINE RES
JI Int. J. Engine Res.
PD DEC
PY 2008
VL 9
IS 6
BP 449
EP 465
DI 10.1243/14680874JER01508
PG 17
WC Thermodynamics; Engineering, Mechanical; Transportation Science &
Technology
SC Thermodynamics; Engineering; Transportation
GA 377VW
UT WOS:000261280900002
ER
PT J
AU Teh, KY
Miller, SL
Edwards, CF
AF Teh, K-Y
Miller, S. L.
Edwards, C. F.
TI Thermodynamic requirements for maximum internal combustion engine cycle
efficiency. Part 2: work extraction and reactant preparation strategies
SO INTERNATIONAL JOURNAL OF ENGINE RESEARCH
LA English
DT Article
DE combustion; entropy generation; exergy destruction; internal combustion
engine efficiency; optimal engine cycle; thermodynamics
AB This is the second of a two-part study that examines, from the exergy management standpoint, the fundamental thermodynamic requirements for maximizing internal combustion (IQ engine cycle efficiency. In Part 1, it is shown that the strategy to minimize exergy destroyed due to combustion reduces to carrying out combustion at the highest possible internal energy state. Based on this optimal strategy, the present paper examines the remaining elements of IC engine architecture - reactant preparation and product expansion (work extraction) - from the standpoint of managing the associated exergy flows to improve overall engine efficiency. Mien considered on its own, work extraction is maximized when the combustion products expand to the environmental dead state, with zero exergy left in the exhaust. However, this optimality condition is mismatched to post-combustion conditions for most fuel-air systems, and manifests as hot exhaust with high exergy even upon expansion to ambient pressure. Several strategies to alleviate the mismatch, via preparation of the fuel-air mixture before combustion commences, are considered: reactant compression, dilution with exhaust or excess air, and heating or cooling. These strategies entail trade-offs between exergy destruction due to combustion, and exergy transfers in the form of work (compression), matter (dilution), or heat transfer. The consequent effects on optimal IC engine cycle efficiency are systematically analysed and catalogued.
C1 [Teh, K-Y; Miller, S. L.; Edwards, C. F.] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA.
RP Teh, KY (reprint author), Sandia Natl Labs, Combust Res Facil, POB 969,MS9052, Livermore, CA 94551 USA.
EM kteh@sandia.gov
FU Global Climate and Energy Project (GCEP)
FX The authors would like to thank Ms Robin Bell for her assistance with
the thermodynamic calculations, as well as Mr Han Ho Song and Mr
Sankaran Ramakrishnan for helpful discussions. This work was supported
by the Global Climate and Energy Project (GCEP) at Stanford University.
NR 10
TC 19
Z9 20
U1 0
U2 7
PU PROFESSIONAL ENGINEERING PUBLISHING LTD
PI WESTMINISTER
PA 1 BIRDCAGE WALK, WESTMINISTER SW1H 9JJ, ENGLAND
SN 1468-0874
J9 INT J ENGINE RES
JI Int. J. Engine Res.
PD DEC
PY 2008
VL 9
IS 6
BP 467
EP 481
DI 10.1243/14680874JER01608
PG 15
WC Thermodynamics; Engineering, Mechanical; Transportation Science &
Technology
SC Thermodynamics; Engineering; Transportation
GA 377VW
UT WOS:000261280900003
ER
PT J
AU Haji-Sheikh, A
Beck, JV
Amos, DE
AF Haji-Sheikh, A.
Beck, J. V.
Amos, Donald E.
TI Axial heat conduction effects in the entrance region of parallel plate
ducts
SO INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
LA English
DT Article
DE Heat transfer; Convection; Axial conduction; Duct flow; Thermal
entrance; Parallel-plate ducts
ID DEVELOPING FORCED-CONVECTION; CIRCULAR POROUS PASSAGES; GRAETZ PROBLEM;
FLOW; CHANNEL; WALLS; TEMPERATURE; FLUID; TUBE
AB Exact series solutions for the computation of temperature in parallel plate channels and circular passages are well known. The inclusion of the contribution of axial conduction leads to a set of modified Graetz type problems for these fluid passages. The emphasis of this paper is the study of the asymptotic variations of wall heat flux values adjacent to the thermal entrance location for parallel plate ducts. The acquired results show interesting variations for different values of the Peclet number near the thermal entrance location. This study reports the unique variations of the wall heat flux Values near the location where the wall temperature changes as the Peclet number changes. (c) 2008 Elsevier Ltd. All rights reserved.
C1 [Haji-Sheikh, A.] Univ Texas Arlington, Dept Mech & Aerosp Engn, Arlington, TX 76019 USA.
[Beck, J. V.] Michigan State Univ, Dept Mech Engn, E Lansing, MI 48824 USA.
[Amos, Donald E.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Haji-Sheikh, A (reprint author), Univ Texas Arlington, Dept Mech & Aerosp Engn, Arlington, TX 76019 USA.
EM haji@uta.edu
NR 23
TC 18
Z9 18
U1 0
U2 2
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0017-9310
J9 INT J HEAT MASS TRAN
JI Int. J. Heat Mass Transf.
PD DEC
PY 2008
VL 51
IS 25-26
BP 5811
EP 5822
DI 10.1016/j.ijheatmasstransfer.2008.04.056
PG 12
WC Thermodynamics; Engineering, Mechanical; Mechanics
SC Thermodynamics; Engineering; Mechanics
GA 382TR
UT WOS:000261628800008
ER
PT J
AU de Monte, F
Beck, JV
Amos, DE
AF de Monte, Filippo
Beck, James V.
Amos, Donald E.
TI Diffusion of thermal disturbances in two-dimensional Cartesian transient
heat conduction
SO INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
LA English
DT Article
DE Diffusion; Thermal disturbances; Computational saving; Penetration time;
Deviation time; Visual time; Differential formulation
AB This paper analyzes the diffusion of thermal disturbances in heat-conducting two-dimensional rectangular bodies through characteristic times, such as penetration and deviation times, denoting their effects within a certain order of magnitude. A single basic criterion governing the above diffusion is derived thanks to the similarity of the findings. it allows very accurate solutions to be obtained considering in advance only the physical region of interest in place of considering the complete body. Therefore, it is efficient in terms of modeling and computational effort in numerically based methods as well as analytical techniques. In the former case, the grid domain can considerably be reduced. In the latter case, the number of terms needed to obtain long-time solutions when time-partitioning is applied can significantly be limited. Also, complex 1D and 2D semi-infinite problems are solved explicitly in the paper and evaluated numerically as part of the analysis. (c) 2008 Elsevier Ltd. All rights reserved.
C1 [de Monte, Filippo] Univ Aquila, Dipartimento Ingn Meccan Energet & Gestionale, I-67040 Laquila, Italy.
[Beck, James V.] Michigan State Univ, Dept Mech Engn, E Lansing, MI 48824 USA.
[Amos, Donald E.] Sandia Natl Labs, Albuquerque, NM 87110 USA.
RP de Monte, F (reprint author), Univ Aquila, Dipartimento Ingn Meccan Energet & Gestionale, I-67040 Laquila, Italy.
EM demonte@ing.univaq.it; beck@egr.msu.edu; deamos@swcp.com
OI de Monte, Filippo/0000-0003-0174-6990
NR 28
TC 26
Z9 26
U1 0
U2 2
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0017-9310
J9 INT J HEAT MASS TRAN
JI Int. J. Heat Mass Transf.
PD DEC
PY 2008
VL 51
IS 25-26
BP 5931
EP 5941
DI 10.1016/j.ijheatmasstransfer.2008.05.015
PG 11
WC Thermodynamics; Engineering, Mechanical; Mechanics
SC Thermodynamics; Engineering; Mechanics
GA 382TR
UT WOS:000261628800021
ER
PT J
AU Laurinavichene, TV
Tekucheva, DN
Laurinavichius, KS
Ghirardi, ML
Seibert, M
Tsyankov, AA
AF Laurinavichene, Tatyana V.
Tekucheva, Darya N.
Laurinavichius, Kestutis S.
Ghirardi, Maria L.
Seibert, Michael
Tsyankov, Anatoly A.
TI Towards the integration of dark and photo fermentative waste treatment.
1. Hydrogen photoproduction by purple bacterium Rhodobacter capsulatus
using potential products of starch fermentation
SO INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
LA English
DT Article
DE Purple bacteria; Hydrogen photoproduction; Fermentation effluent
ID PHOTOSYNTHETIC BACTERIA; BIOHYDROGEN PRODUCTION; PRACTICAL APPLICATION;
PURE CULTURES; FATTY-ACIDS; GROWTH; ACETATE; WATER; LIMITATIONS;
PROSPECTS
AB In this study, the H(2)-photoproduction capacity of Rhodobacter capsulatus B10 was measured as a function of variations in the nature and concentration of volatile fatty acids (VFAs) and other products of dark fermentation. when an equimolar mixture of VFAs was provided, C4 substrates (butyrate and isobutyrate) were not consumed until the C2-C3 substrates (acetate, propionate, and lactate) became unavailable, but in order for the cells to produce H(2) at high rates they could not be exposed to severe growth substrate depletion. Among other possible fermentation products, the highest inhibition was observed by the addition of butanol (50% inhibition at 50 mM). The influence of high concentrations of VFAs, phosphate (used to stabilize the pH during dark fermentation) and some heavy metals (known inhibitors of methanogenesis) was also shown. Based on the results, the conditions of fermentation can be manipulated to avoid the inhibition of subsequent H(2) photoproduction by photosynthetic bacteria. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
C1 [Laurinavichene, Tatyana V.; Tekucheva, Darya N.; Tsyankov, Anatoly A.] Russian Acad Sci, Inst Basic Biol Problems, Pushchino 142290, Moscow Region, Russia.
[Laurinavichius, Kestutis S.] Russian Acad Sci, Inst Physiol & Biochem Microorganisms, Pushchino 142290, Moscow Region, Russia.
[Ghirardi, Maria L.; Seibert, Michael] Basic Sci Ctr, Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Tsyankov, AA (reprint author), Russian Acad Sci, Inst Basic Biol Problems, Pushchino 142290, Moscow Region, Russia.
EM ttt@issp.serpukhov.su
FU Program of Basic Research, Russian Academy of Sciences [7]; Russian
Foundation of Basic Research [08-08-12196]; NREL [NFA-7-77613-01]; US
Department of Energy's Hydrogen, Fuel Cell and Infrastructure Technology
Program
FX This work was supported by the Program of Basic Research, Russian
Academy of Sciences #7; the Russian Foundation of Basic Research
(08-08-12196); subcontract NFA-7-77613-01 from NREL (Golden, CO, USA);
and by the US Department of Energy's Hydrogen, Fuel Cell and
Infrastructure Technology Program (MS and MLG).
NR 23
TC 27
Z9 29
U1 0
U2 8
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 DEC
PY 2008
VL 33
IS 23
BP 7020
EP 7026
DI 10.1016/j.ijhydene.2008.09.033
PG 7
WC Chemistry, Physical; Electrochemistry; Energy & Fuels
SC Chemistry; Electrochemistry; Energy & Fuels
GA 386YG
UT WOS:000261917900024
ER
PT J
AU Wallner, T
Lohse-Busch, H
Gurski, S
Duoba, M
Thiel, W
Martin, D
Korn, T
AF Wallner, Thomas
Lohse-Busch, Hennning
Gurski, Stephen
Duoba, Mike
Thiel, Wolfgang
Martin, Dieter
Korn, Thomas
TI Fuel economy and emissions evaluation of BMW Hydrogen 7 Mono-Fuel
demonstration vehicles
SO INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
LA English
DT Article
DE BMW Hydrogen 7; Efficiency; Emissions
AB This article summarizes the testing of two BMW Hydrogen 7 Mono-Fuel demonstration vehicles at Argonne National Laboratory's Advanced Powertrain Research Facility (APRF). The BMW Hydrogen 7 Mono-Fuel demonstration vehicles are derived from the BMW Hydrogen 7 bi-fuel vehicles and based on a BMW 760iL. The mono-fuel as well as the bi-fuel vehicle(s) is equipped with cryogenic hydrogen on-board storage and a gaseous hydrogen port fuel injection system.
The BMW Hydrogen 7 Mono-Fuel demonstration vehicles were tested for fuel economy as well as emissions on the Federal Test Procedure FTP-75 cold-start test as well as the highway test. The results show that these vehicles achieve emissions levels that are only a fraction of the Super Ultra Low Emissions Vehicle (SULEV) standard for nitric oxide (NO.) and carbon monoxide (CO) emissions. For non-methane hydrocarbon (NMHC) emissions the cycle-averaged emissions are actually 0 g/mile, which require the car to actively reduce emissions compared to the ambient concentration. The fuel economy numbers on the FTP-75 test were 3.7 kg of hydrogen per 100 km, which, on an energy basis, is equivalent to a gasoline fuel consumption of 17 miles per gallon (mpg). Fuel economy numbers for the highway cycle were determined to be 2.1 kg of hydrogen per 100 km or 30 miles per gallon of gasoline equivalent (GGE).
In addition to cycle-averaged emissions and fuel economy numbers, time-resolved (modal) emissions as well as air/fuel ratio data is analyzed to further investigate the root causes of the remaining emissions traces. The BMW Hydrogen 7 vehicles employ a switching strategy with lean engine operation at low engine loads and stoichiometric operation at high engine loads that avoids the NO(x) emissions critical operating regime with relative air/fuel ratios between 1 < lambda < 2. The switching between these operating modes was found to be a major source of the remaining NO(x) emissions.
The emissions results collected during this period lead to the conclusion that the BMW Hydrogen 7 Mono-Fuel demonstration vehicles are likely the cleanest combustion engine vehicles ever tested at Argonne's APRF. (c) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
C1 [Wallner, Thomas; Lohse-Busch, Hennning; Gurski, Stephen; Duoba, Mike] Argonne Natl Lab, Argonne, IL 60439 USA.
[Thiel, Wolfgang; Martin, Dieter] BMW Grp, D-80788 Munich, Germany.
[Korn, Thomas] BMW Grp, Oxnard, CA 93033 USA.
RP Wallner, T (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM twallner@anl.gov
FU Department of Energy Office of Science laboratory [DE-AC02-06CH11357];
DOE's FreedomCAR and Vehicle Technologies Program
FX This research was funded by DOE's FreedomCAR and Vehicle Technologies
Program, office of Energy Efficiency and Renewable Energy. The authors
wish to thank Lee Slezak and Gurpreet Singh, program managers at DOE,
for their continuing support of hydrogen activities. Testing of the BMW
Hydrogen 7 vehicles was only possible with the extensive support through
BMW of North America, LLC as well as BMW Group in Munich. The authors
would like to express the gratitude to all the individuals from BMW
involved in preparing, performing as well as analyzing these tests.
NR 16
TC 28
Z9 28
U1 4
U2 18
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 DEC
PY 2008
VL 33
IS 24
BP 7607
EP 7618
DI 10.1016/j.ijhydene.2008.08.067
PG 12
WC Chemistry, Physical; Electrochemistry; Energy & Fuels
SC Chemistry; Electrochemistry; Energy & Fuels
GA 389FX
UT WOS:000262077900034
ER
PT J
AU Alexander, CS
Chhabildas, LC
Reinhart, WD
Templeton, DW
AF Alexander, C. S.
Chhabildas, L. C.
Reinhart, W. D.
Templeton, D. W.
TI Changes to the shock response of fused quartz due to glass modification
SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
LA English
DT Article; Proceedings Paper
CT 10th Hypervelocity Impact Symposium (HVIS 2007)
CY SEP 23-27, 2007
CL Williamsburg, VA
DE Shock; Glass; Random network model; Glass modifiers; Fused silica
ID SODA-LIME GLASS; WAVE COMPRESSION; STISHOVITE; BEHAVIOR; RELEASE
AB Silica based glasses are commonly used as window material in applications which are subject to high velocity impacts. Thorough understanding of the response to shock loading in these materials is crucial to the development of new designs. Despite the lack of long range order in amorphous glasses, the structure can be described statistically by the random network model. Changes to the network structure alter the response to shock loading. Results indicate that in fused silica, substitution of boron as a network former does not have a large effect on the shock loading properties while modifying the network with sodium and calcium changes the dynamic response. These initial results suggest the potential of a predictive capability to determine the effects of other network substitutions. Published by Elsevier Ltd.
C1 [Alexander, C. S.; Chhabildas, L. C.; Reinhart, W. D.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Templeton, D. W.] US Army Tank Automot Res, Ctr Dev & Engn, Warren, MI 48397 USA.
RP Alexander, CS (reprint author), Sandia Natl Labs, Albuquerque, NM 87185 USA.
EM calexa@sandia.gov
NR 26
TC 37
Z9 39
U1 1
U2 12
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0734-743X
J9 INT J IMPACT ENG
JI Int. J. Impact Eng.
PD DEC
PY 2008
VL 35
IS 12
BP 1376
EP 1385
DI 10.1016/j.ijimpeng.2008.07.019
PG 10
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 392YQ
UT WOS:000262338500004
ER
PT J
AU Borg, JP
Vogler, TJ
AF Borg, J. P.
Vogler, T. J.
TI Mesoscale simulations of a dart penetrating sand
SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
LA English
DT Article; Proceedings Paper
CT 10th Hypervelocity Impact Symposium (HVIS 2007)
CY SEP 23-27, 2007
CL Williamsburg, VA
DE Mesoscale simulations; Porous compaction; Penetration dynamics; Sand
ID SHOCK-WAVES; OTTAWA SAND; IMPACT; QUARTZ; COMPRESSION; PROJECTILES;
CONCRETE; VELOCITIES; DYNAMICS; EQUATION
AB Historically, hydrodynamic calculations have utilized continuum constitutive models to simulate the coupled dynamic response of a solid projectile penetrating a heterogeneous target system such as concrete, foam or a granular porous medium. Continuum models fail to capture the complicated grain level response within the heterogeneous target which can result in asymmetric loading of the projectile leading to variations in projectile performance. These grain level effects can be crucial to predicting the penetration depth or overall effectiveness of the projectile. In order to assess the possibility of using mesoscale simulations to resolve the grain level dynamics, hydrodynamic simulations were performed for an 11.4 cm long, 0.9 cm diameter dart penetrating a bed of porous granular dry sand with an initial velocity of 366 m/s. Simulations were performed using the Eulerian hydrocode CTH in a two-dimensional planar configuration. The goal of the mesoscale simulations is to determine the viability of using these techniques as an alternative to continuum models and to assess the effects of grain level variability such as anisotropic material distributions and variations in the dynamic yield and fracture strength. The results indicate that variations in the size distribution of aggregate added and the fracture strength of the sand system can have a significant effect on penetration performance of the dart; whereas variations in the dynamic strength of the sand had little effect on the dart penetration. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Borg, J. P.] Marquette Univ, Dept Mech Engn, Milwaukee, WI 53233 USA.
[Vogler, T. J.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Borg, JP (reprint author), Marquette Univ, Dept Mech Engn, Milwaukee, WI 53233 USA.
EM john.borg@marquette.edu
RI Vogler, Tracy/B-4489-2009
NR 48
TC 9
Z9 9
U1 3
U2 10
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0734-743X
J9 INT J IMPACT ENG
JI Int. J. Impact Eng.
PD DEC
PY 2008
VL 35
IS 12
BP 1435
EP 1440
DI 10.1016/j.ijimpeng.2008.07.064
PG 6
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 392YQ
UT WOS:000262338500012
ER
PT J
AU Boslough, MBE
Crawford, DA
AF Boslough, M. B. E.
Crawford, D. A.
TI Low-altitude airbursts and the impact threat
SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
LA English
DT Article; Proceedings Paper
CT 10th Hypervelocity Impact Symposium (HVIS 2007)
CY SEP 23-27, 2007
CL Williamsburg, VA
DE CTH; Hydrocode; Airburst; Planetology; Asteroid
ID 1908 TUNGUSKA EXPLOSION; LIBYAN DESERT GLASS; SHOEMAKER-LEVY 9; EARTH;
ORIGIN; BODY
AB We present CTH simulations of airbursts in the Earth's lower atmosphere from hypervelocity asteroid impacts. The intent of these simulations was to explore the phenomenology associated with low-altitude airbursts, with the particular goal of determining whether the altitude of maximum energy deposition can be used as a reasonable estimate of the equivalent height of a point source explosion. Our simulations suggest that this is not a good approximation. The center of mass of an exploding projectile is transported downward in the form of a high-temperature jet of expanding gas. The jet descends by a significant fraction of the burst altitude before its velocity becomes subsonic. The time scale of this descent is similar to the time scale of the explosion itself, so the jet simultaneously couples its kinetic energy and its internal energy to the atmosphere. Because of this downward flow, larger blast waves and stronger thermal radiation pulses are felt at the surface than would be predicted by a point source explosion at the height where the burst was initiated. For impacts with a kinetic energy above some threshold, the hot jet of vaporized projectile (the descending "fireball") makes contact with the Earth's surface, where it expands radially. During the time of radial expansion, the fireball can maintain temperatures well above the melting temperature of silicate minerals, and its radial velocity can exceed the sound speed in air. We suggest that the surface materials can ablate by radiative/convective melting under these conditions, and then quench rapidly to form glass after the fireball cools and recedes. Possible examples of such airburst glasses are the Muong-Nong Tektites of Southeast Asia and the Libyan Desert Glass of western Egypt. We suggest an enhancement of entry dynamics models to account for the downward advection of shocked and heated material, and the lowering of the apparent airburst altitude. The actual differences between the effects on the ground from a point source approximation versus a full flow field still need to be quantified by running more realistic high-resolution 3-D simulations with a variety of impact parameters. A re-evaluation of the impact hazard is necessary to properly include this enhanced damage potential of low-altitude airbursts. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Boslough, M. B. E.; Crawford, D. A.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Boslough, MBE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM mbboslo@sandia.gov
NR 30
TC 55
Z9 56
U1 1
U2 15
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0734-743X
J9 INT J IMPACT ENG
JI Int. J. Impact Eng.
PD DEC
PY 2008
VL 35
IS 12
BP 1441
EP 1448
DI 10.1016/j.ijimpeng.2008.07.053
PG 8
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 392YQ
UT WOS:000262338500013
ER
PT J
AU Remo, JL
Furnish, MD
AF Remo, J. L.
Furnish, M. D.
TI Analysis of Z-pinch shock wave experiments on meteorite and planetary
materials
SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
LA English
DT Article; Proceedings Paper
CT 10th Hypervelocity Impact Symposium (HVIS 2007)
CY SEP 23-27, 2007
CL Williamsburg, VA
DE Meteorite; Z-pinch; Coupling
ID DRIVEN SHOCK; RADIATION; PRESSURE
AB The response of a range of meteorite and planetary materials of astrophysical and planetary science interest to pulsed high-energy-density soft X-ray irradiation from the Sandia National Laboratories Zpinch accelerator is described. These materials include selected iron and stony meteorites, magnesium-rich olivine (dunite), and AI and Fe calibration materials. In each experiment, the motion of the rear surface of the sample was monitored by velocity interferometry. From the resulting waveform and information about the incident pulse, information about the radiation coupling and the response of the sample to stress waves was deduced. The primary Planckian Z-pinch soft X-ray stagnation emissions have black body equivalent temperatures in the range 170-237 eV, with similar to 1-10% K-alpha radiation derived from the pinch material (Cu, Al, Ni or steel). Hohlraum intensities at the stagnation pinch were in the range 84-316 TW/cm(2) on time scales from 3.0 to 8.2 ns, and from 43 to 260 GW/cm(2) at the sample positions 7-14 cm away from the pinch center, assuming an inverse-square radial dependence along a line-of-sight distance. This is analytically estimated to generate target surface radiation pressure of 6.1-12.4 GPa. The very short duration of the loading pulse establishes an attenuating shock wave. Consistent pressure measurements on the calibration targets' rear surfaces suggest a uniform soft X-ray beam on the calibration target surfaces while the (inhomogeneous) natural materials yield Hugoniot pressures with considerable variance, as expected. Thusfar we have not recovered the targets, precluding post-irradiation analysis. Published by Elsevier Ltd.
C1 [Furnish, M. D.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Remo, J. L.] Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA.
[Remo, J. L.] Harvard Univ, Dept Astron, Cambridge, MA 02138 USA.
[Remo, J. L.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Furnish, MD (reprint author), Sandia Natl Labs, MS 1195,POB 5800, Albuquerque, NM 87185 USA.
EM mdfurni@sandia.gov
NR 23
TC 6
Z9 6
U1 2
U2 4
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0734-743X
J9 INT J IMPACT ENG
JI Int. J. Impact Eng.
PD DEC
PY 2008
VL 35
IS 12
BP 1516
EP 1521
DI 10.1016/j.ijimpeng.2008.07.075
PG 6
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 392YQ
UT WOS:000262338500024
ER
PT J
AU Goto, DM
Becker, R
Orzechowski, TJ
Springer, HK
Sunwoo, AJ
Syn, CK
AF Goto, D. M.
Becker, R.
Orzechowski, T. J.
Springer, H. K.
Sunwoo, A. J.
Syn, C. K.
TI Investigation of the fracture and fragmentation of explosively driven
rings and cylinders
SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
LA English
DT Article; Proceedings Paper
CT 10th Hypervelocity Impact Symposium (HVIS 2007)
CY SEP 23-27, 2007
CL Williamsburg, VA
DE High strain rates; Microstructure; Explosives; Fragmentation
ID METALS; BEHAVIOR
AB Cylinders and rings fabricated from AerMet (R) 100 alloy and AISI 1018 steel have been explosively driven to fragmentation in order to determine the fracture strains for these materials under plane-strain and uniaxial-stress conditions. The phenomena associated with the dynamic expansion and subsequent break up of the cylinders are monitored with high-speed diagnostics. In addition, complementary experiments are performed in which fragments from the explosively driven cylinders are recovered and analyzed to determine the statistical distribution associated with the fragmentation process as well as to determine failure mechanisms. The data are used to determine relevant coefficients for the Hancock-McKenzie (Johnson-Cook) fracture model. Metallurgical analysis of the fragments provides information on damage and failure mechanisms. (C) 2008 Published by Elsevier Ltd.
C1 [Goto, D. M.; Becker, R.; Orzechowski, T. J.; Springer, H. K.; Sunwoo, A. J.; Syn, C. K.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Goto, DM (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94550 USA.
EM goto1@llnl.gov
RI Becker, Richard/I-1196-2013
NR 23
TC 41
Z9 49
U1 1
U2 14
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0734-743X
J9 INT J IMPACT ENG
JI Int. J. Impact Eng.
PD DEC
PY 2008
VL 35
IS 12
BP 1547
EP 1556
DI 10.1016/j.ijimpeng.2008.07.081
PG 10
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 392YQ
UT WOS:000262338500029
ER
PT J
AU Bergeron, NP
Hollerman, WA
Goedeke, SM
Moore, RJ
AF Bergeron, N. P.
Hollerman, W. A.
Goedeke, S. M.
Moore, R. J.
TI Triboluminescent properties of zinc sulfide phosphors due to
hypervelocity impact
SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
LA English
DT Article; Proceedings Paper
CT 10th Hypervelocity Impact Symposium (HVIS 2007)
CY SEP 23-27, 2007
CL Williamsburg, VA
DE Hypervelocity; Impact; Triboluminescence; ZnS:Mn; Phosphor
ID ZNS-MN
AB The emission of light due to crystal fracture, or triboluminescence (TL), is a phenomenon that has been known for centuries. One of the most common examples of TL is the flash created from chewing Wint-O-Green Lifesavers. From 2004 to 2006, research was completed using the two-stage light gas gun located at the NASA Marshall Space Flight Center (MSFC) in Huntsville, Alabama to measure the TL properties for zinc sulfide doped with both manganese (ZnS:Mn) and copper (ZnS:Cu). Results clearly show that hypervelocity impact-induced TL has been observed for both ZnS:Mn and ZnS:Cu. For ZnS:Mn, TL produced during 4.7 and 5.7 km/s impacts was statistically more luminous than was observed from similar data collected at 3.3 km/s. The TL decay time for ZnS:Mn was found to be 292 +/- 58 mu s, which is totally consistent with earlier measurements that did not use impact as an excitation source. Further the, emission of TL from ZnS:Mn undergoing hypervelocity impact has been demonstrated to have a significant component at the known peak emission wavelength of ZnS:Mn of 585 nm. Small TL emission generated as a result of hypervelocity impact was also observed from ZnS:Cu. The most intriguing conclusion from this research is that it may be possible to discriminate impact velocity by measuring the time-integrated luminosity of TL phosphors. An ability to measure the velocity of a hypervelocity impact is a significant indicator of the potential usefulness for this concept for use as an impact sensor in future spacecraft. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Bergeron, N. P.; Hollerman, W. A.; Moore, R. J.] Univ Louisiana Lafayette, Dept Phys, Lafayette, LA 70504 USA.
[Goedeke, S. M.] Oak Ridge Natl Lab, Engn Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Hollerman, WA (reprint author), Univ Louisiana Lafayette, Dept Phys, Lafayette, LA 70504 USA.
EM hollerman@louisiana.edu
RI Hollerman, William/F-5943-2011
NR 7
TC 29
Z9 30
U1 0
U2 9
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0734-743X
J9 INT J IMPACT ENG
JI Int. J. Impact Eng.
PD DEC
PY 2008
VL 35
IS 12
BP 1587
EP 1592
DI 10.1016/j.ijimpeng.2008.07.007
PG 6
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 392YQ
UT WOS:000262338500035
ER
PT J
AU Kearsley, AT
Graham, GA
Burchell, MJ
Cole, MJ
Wozniakiewicz, P
Teslich, N
Bringa, E
Horz, F
Blum, J
Poppe, T
AF Kearsley, A. T.
Graham, G. A.
Burchell, M. J.
Cole, M. J.
Wozniakiewicz, P.
Teslich, N.
Bringa, E.
Horz, F.
Blum, J.
Poppe, T.
TI Micro-craters in aluminum foils: Implications for dust particles from
comet Wild 2 on NASA's Stardust spacecraft
SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
LA English
DT Article; Proceedings Paper
CT 10th Hypervelocity Impact Symposium (HVIS 2007)
CY SEP 23-27, 2007
CL Williamsburg, VA
DE Stardust; Wild 2; Cometary dust; Hypervelocity impact; Crater morphology
ID IMPACT FEATURES; 81P/WILD-2; MORPHOLOGY; TARGETS; SAMPLES; SIZE
AB Dust impacts on aluminum foils during encounter of comet 81 P/Wild 2 by the Stardust spacecraft in January 2004 have been simulated using spherical projectiles of monodispersive polymer, glass, and metals, and polydispersive mineral powders of diverse grain shapes. The encounter speed of the cometary particles was a constant and modest 6.1 km s(-1), well within the capabilities of light gas guns. permitting high fidelity experiments to infer dust size, density, and mass from quantitative dimensional analysis of both natural and experimental impact features. Specific interest focused on exceptionally small impactors, all <100 mu m and some as small as 1.5 mu m. To simulate the compound shape of many Stardust craters required novel, artificial aggregate projectiles of heterogeneous mass distribution. We demonstrate that the dimensional scaling obtained previously for millimeter sized impactors extends to particles as small as 10 mu m at 6.1 km s(-1), all yielding a constant relationship for spherical soda lime glass projectiles of diameter (Dp) to crater diameter (Dc) in All 100 of Dc = 4.6 Dp; however, this ratio seems to decrease for projectiles << 10 mu m. The overwhelming majority of the Stardust craters are <20 mu m in diameter, and substantial challenges remain in quantifying the exact size-frequency distribution of the Wild 2 comet dust. Nevertheless, the current experiments provide improved insights into some of the particles' physical properties. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Kearsley, A. T.; Wozniakiewicz, P.] Nat Hist Museum, Dept Mineral, Impact & Astromat Res Ctr, London SW7 5BD, England.
[Graham, G. A.; Teslich, N.; Bringa, E.] Lawrence Livermore Natl Lab, IGPP, Livermore, CA 94551 USA.
[Burchell, M. J.; Cole, M. J.] Univ Kent, Sch Phys Sci, Canterbury CT2 7NH, Kent, England.
[Wozniakiewicz, P.] Univ London Imperial Coll Sci Technol & Med, Dept Earth Sci & Engn, London SW7 2AZ, England.
[Horz, F.] NASA, Lyndon B Johnson Space Ctr, ESCG, LZ Technol Inc,JE 23, Houston, TX 77058 USA.
[Blum, J.; Poppe, T.] Tech Univ Carolo Wilhelmina Braunschweig, Inst Geophys & Extraterrestr Phys, D-38106 Braunschweig, Germany.
RP Kearsley, AT (reprint author), Nat Hist Museum, Dept Mineral, Impact & Astromat Res Ctr, London SW7 5BD, England.
EM antk@nhm.ac.uk
RI Blum, Jurgen/B-5590-2011; Bringa, Eduardo/F-8918-2011;
OI Blum, Jurgen/0000-0003-1531-737X; Burchell, Mark/0000-0002-2680-8943
NR 19
TC 15
Z9 15
U1 0
U2 5
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0734-743X
J9 INT J IMPACT ENG
JI Int. J. Impact Eng.
PD DEC
PY 2008
VL 35
IS 12
BP 1616
EP 1624
DI 10.1016/j.ijimpeng.2008.07.006
PG 9
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 392YQ
UT WOS:000262338500040
ER
PT J
AU Reinhart, WD
Thornhill, TF
Chhabildas, LC
Breiland, WG
Brown, JL
AF Reinhart, W. D.
Thornhill, T. F.
Chhabildas, L. C.
Breiland, W. G.
Brown, J. L.
TI Temperature measurements of expansion products from shock compressed
materials using high-speed spectroscopy
SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
LA English
DT Article; Proceedings Paper
CT 10th Hypervelocity Impact Symposium (HVIS 2007)
CY SEP 23-27, 2007
CL Williamsburg, VA
DE Spectroscopy; Hypervelocity; Temperature; Shock compression;
Composition-B
ID ALUMINUM; KM/S; NITROMETHANE; TANTALUM; PRESSURE; COPPER; GPA
AB Results from spectral radiance measurements using optical multi-channel analyzer over the visible and near infrared regime provide estimates of temperature from expansion products resulting from shocked materials. Specifically, we have made spectral radiance measurements over the wavelength regime of 300-1500 nm. Experiments conducted on aluminum, cerium, and Composition-B high explosive span a wide regime of E/E(v), where E is the internal energy increase of the shocked material, and E(v), is the specific energy required to vaporize the material. For the materials investigated, the ratio is similar to 1, 3 and 5 for aluminum, cerium, and Composition-B, respectively. The basic assumption made to deduce these temperatures is that the debris cloud is radiating as a blackbody with emissivity of one and independent of the wavelength. We are also assuming that the probe is monitoring the debris, which is at a single temperature and that there is no spatial temperature gradient. Temperatures at or above the boiling point are confirmed for aluminum and cerium, while the results for Composition-B provide the time-dependent temperature expansion history for shocked Composition-B over the stress regime of 28-130 GPa. These are the first measurements of temperature obtained from the expansion products from materials that have been shocked to very high pressures. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Reinhart, W. D.; Thornhill, T. F.; Breiland, W. G.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Chhabildas, L. C.] USAF, Res Lab, Eglin AFB, FL 32542 USA.
[Brown, J. L.] CALTECH, Pasadena, CA 91125 USA.
RP Reinhart, WD (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM wdreinh@sandia.gov
NR 27
TC 5
Z9 5
U1 3
U2 10
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0734-743X
J9 INT J IMPACT ENG
JI Int. J. Impact Eng.
PD DEC
PY 2008
VL 35
IS 12
BP 1745
EP 1755
DI 10.1016/j.ijimpeng.2008.07.062
PG 11
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 392YQ
UT WOS:000262338500060
ER
PT J
AU Thornhill, TF
Reinhart, WD
Chhabildas, LC
Breiland, WG
Alexander, CS
Brown, JL
AF Thornhill, T. F.
Reinhart, W. D.
Chhabildas, L. C.
Breiland, W. G.
Alexander, C. S.
Brown, J. L.
TI Characterization of prompt flash signatures using high-speed broadband
diode detectors
SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
LA English
DT Article; Proceedings Paper
CT 10th Hypervelocity Impact Symposium (HVIS 2007)
CY SEP 23-27, 2007
CL Williamsburg, VA
DE Impact flash; Photo-diode; Aluminum; Composition-B; Pyrometer
ID IMPACT; PHENOMENOLOGY
AB Impact flash is a brief, intense flash of light released when a target is impacted by a hypervelocity particle. It is caused by emissions from a jet of shocked material which is thrown from the impact site. Impact flash phenomenology has been known for decades, and is now being considered for applications where remote diagnostics are required to observe and diagnose impacts on satellites and space craft where micrometeoroid and orbital debris impacts are common. Additionally, this phenomena and remote diagnostics are under consideration for missile defense applications. Currently, optical signatures created from hypervelocity impact can be utilized as the basis for detectors (spectrometers, pyrometers), which characterize the material composition and temperature. More recent interest has focused on study of hypervelocity impact generated debris and the physics of the associated rapidly expanding and cooling multiphase debris cloud. To establish this capability technically in the laboratory, we have conducted a series of experiments on a two-stage light gas gun at impact velocities ranging from 6 to 19 km/s, which is representative for light emissions resulting from hypervelocity impacts in space. At these high impact velocities jetting is no longer the dominant mechanism for observed impact flash signatures. The focus of this work is to develop fast, inexpensive photo-diodes for use as a reliable prompt flash, and late time radiating debris cloud diagnostic to: (a) characterize material behavior in the shocked and expanding state when feasible; (b) ascertain scaling of luminosity with impact velocity; (c) determine the temperature of the impact flash resulting from radiating emissions when multiple silicon diodes are used in conjunction with narrow band pass filtering at specific wavelengths as a pyrometer. The results of these experiments are discussed in detail using both a metallic target, such as aluminum, and an organic material such as Composition-B explosive. (C) 2008 Published by Elsevier Ltd.
C1 [Thornhill, T. F.] Ktech Corp Inc, Albuquerque, NM 87123 USA.
[Reinhart, W. D.; Breiland, W. G.; Alexander, C. S.; Brown, J. L.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Chhabildas, L. C.] USAF, Res Labs, AFRL RWMW, Eglin AFB, FL 32542 USA.
RP Thornhill, TF (reprint author), Ktech Corp Inc, 10800 Gibson SE, Albuquerque, NM 87123 USA.
EM tfthorn@ktech.com
NR 22
TC 2
Z9 3
U1 2
U2 6
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0734-743X
J9 INT J IMPACT ENG
JI Int. J. Impact Eng.
PD DEC
PY 2008
VL 35
IS 12
BP 1827
EP 1835
DI 10.1016/j.ijimpeng.2008.07.058
PG 9
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 392YQ
UT WOS:000262338500071
ER
PT J
AU Vogler, TJ
Trott, WM
Reinhart, WD
Alexander, CS
Furnish, MD
Knudson, MD
Chhabildas, LC
AF Vogler, T. J.
Trott, W. M.
Reinhart, W. D.
Alexander, C. S.
Furnish, M. D.
Knudson, M. D.
Chhabildas, L. C.
TI Using the line-VISAR to study multi-dimensional and mesoscale impact
phenomena
SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
LA English
DT Article; Proceedings Paper
CT 10th Hypervelocity Impact Symposium (HVIS 2007)
CY SEP 23-27, 2007
CL Williamsburg, VA
DE Interferometry; Mesoscale; Phase transformation; Edge release;
Hypervelocity launch
ID SHOCK-WAVE; COMPRESSION; IRON
AB The line-VISAR is an optical interferometry system that allows velocities to be measured in a spatially and temporally resolved manner. The ability to measure velocity not only as a function of time but also as a function of position represents a significant advance over other diagnostics and opens up several new avenues of research. Over the last few years, the line-VISAR has been used to study a variety of phenomena related to material behavior at the mesoscale such as crushing of granular sugar, nonuniform failure of materials such as the statistics of spall strength, and multi-dimensional configurations such as flyer launch, embedded defects, and material interfaces. Here, we review the studies reported to date that utilized the line-VISAR in the investigation as well as presenting new results on nonuniformity of the phase transformation in iron and hypervelocity flyer launch with the Z machine. As part of the review, we will highlight examples of multi-dimensional applications resulting from impacts over the velocity range of 0.20 to 13 km/s. These examples demonstrate that the line-VISAR can be a valuable addition to the suite of diagnostics for impact and hypervelocity phenomena. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Vogler, T. J.; Trott, W. M.; Reinhart, W. D.; Alexander, C. S.; Furnish, M. D.; Knudson, M. D.; Chhabildas, L. C.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Vogler, TJ (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM tjvogle@sandia.gov
RI Vogler, Tracy/B-4489-2009
NR 29
TC 10
Z9 13
U1 3
U2 8
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0734-743X
J9 INT J IMPACT ENG
JI Int. J. Impact Eng.
PD DEC
PY 2008
VL 35
IS 12
BP 1844
EP 1852
DI 10.1016/j.ijimpeng.2008.07.040
PG 9
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 392YQ
UT WOS:000262338500073
ER
PT J
AU Naraghi-Arani, P
Lenhoff, R
Thissen, J
Carrillo, AC
Olivas, J
Michele, SM
AF Naraghi-Arani, P.
Lenhoff, R.
Thissen, J.
Carrillo, A. C.
Olivas, J.
Michele, S. M.
TI Rapid, Simultaneous Detection of Multiple Animal Viruses by Bead-Based
Multiplexed RT-PCR
SO INTERNATIONAL JOURNAL OF INFECTIOUS DISEASES
LA English
DT Meeting Abstract
C1 [Naraghi-Arani, P.; Lenhoff, R.; Thissen, J.; Carrillo, A. C.; Olivas, J.; Michele, S. M.] Lawrence Livermore Natl Lab, Livermore, CA USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1201-9712
J9 INT J INFECT DIS
JI Int. J. Infect. Dis.
PD DEC
PY 2008
VL 12
BP E139
EP E140
DI 10.1016/j.ijid.2008.05.347
PG 2
WC Infectious Diseases
SC Infectious Diseases
GA 406II
UT WOS:000263287800346
ER
PT J
AU Kalb, SR
Smith, TJ
Moura, H
Hill, K
Lou, JL
Geren, IN
Garcia-Rodriguez, C
Marks, JD
Smith, LA
Pirkle, JL
Barr, JR
AF Kalb, Suzanne R.
Smith, Theresa J.
Moura, Hercules
Hill, Karen
Lou, Jianlong
Geren, Isin N.
Garcia-Rodriguez, Consuelo
Marks, James D.
Smith, Leonard A.
Pirkle, James L.
Barr, John R.
TI The use of Endopep-MS to detect multiple subtypes of botulinum
neurotoxins A, B, E, and F
SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
LA English
DT Article
DE Botulinum neurotoxin; Botulism; Mass spectrometry
ID CLOSTRIDIUM-BOTULINUM; NUCLEOTIDE-SEQUENCE; MASS-SPECTROMETRY; INFANT
BOTULISM; BINDING DOMAIN; ANTIBODY; TOXIN; GENE; STRAINS; CHAIN
AB Botulinum neurotoxins (BoNTs) cause the disease botulism, which can be lethal if untreated. Rapid determination of exposure to BoNT is an important public health goal. Previous work in our laboratory focused on the development of Endopep-MS, a mass spectrometry-based endopeptidase method for detecting and differentiating BoNT A-G in buffer and BoNT A, B, E, and F in clinical samples. We introduce here the use of Endeopep-MS to detect non-commercial subtypes of BoNT A, B, E, and F which have been associated with botulism outbreaks. We have now tested and successfully detected 15 of the 17 known subtypes of BoNT A, B, E, and F by Endopep-MS. Extraction of BoNT A and B from a complex mixture prior to analysis is accomplished by using monoclonal antibodies specific for the catalytically inactive heavy chain of the toxin. These antibodies have high-binding affinities and do not interfere with the catalytic activity of the light chain resulting in a lower limit of detection for BoNT A and B than previously reported. We also report for the first time limits of detection for BoNT A2, A3, B2, and bivalent B using Endopep-MS. Published by Elsevier B.V.
C1 [Kalb, Suzanne R.; Moura, Hercules; Pirkle, James L.; Barr, John R.] Ctr Dis Control & Prevent, NCEH, DLS, Atlanta, GA 30341 USA.
[Smith, Theresa J.; Smith, Leonard A.] USA, Med Res Inst Infect Dis, Ft Detrick, MD 21702 USA.
[Hill, Karen] Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
[Lou, Jianlong; Geren, Isin N.; Garcia-Rodriguez, Consuelo; Marks, James D.] Univ Calif San Francisco, San Francisco Gen Hosp, Dept Anesthesia & Pharmaceut Chem, San Francisco, CA 94110 USA.
RP Barr, JR (reprint author), Ctr Dis Control & Prevent, NCEH, DLS, 4770 Buford Highway NE,Mailstop F-44, Atlanta, GA 30341 USA.
EM jbarr@cdc.gov
FU NIAID cooperative [U01 A1056493, 200-2006-16697]; CDC [200-2006-16697]
FX The authors acknowledge several funding sources for the production of
monoclonal antibodies: NIAID cooperative agreement U01 A1056493 (JDM),
DoD contract DAMD17-03-C-0076 UDM), UC MEXUS-CONACYT Faculty Visit
Fellowship (CG), and CDC contract 200-2006-16697 UDM).
NR 33
TC 29
Z9 29
U1 3
U2 8
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 DEC 1
PY 2008
VL 278
IS 2-3
BP 101
EP 108
DI 10.1016/j.ijms.2008.04.004
PG 8
WC Physics, Atomic, Molecular & Chemical; Spectroscopy
SC Physics; Spectroscopy
GA 378EM
UT WOS:000261304000002
ER
PT J
AU Gulgun, MA
Sturm, S
Cannon, RM
Ruhle, M
AF Guelguen, Mehmet A.
Sturm, Saso
Cannon, Rowland M.
Ruehle, Manfred
TI Transient dopant segregation and precipitation in yttrium-doped alumina
SO INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
DE Precipitation; Grain boundary segregation; Interfaces; Electron energy
loss spectroscopy (EELS); YAP/YAG
ID HIGH-TEMPERATURE CREEP; FINE-GRAINED ALUMINA; ALPHA-ALUMINA; CATION
SEGREGATION; BOUNDARIES; RESISTANCE; CRYSTALLIZATION; ALPHA-AL2O3;
EVOLUTION; SYSTEM
AB Ultra-pure Al2O3 ceramics doped with 2000 ppm of Y2O3 were sintered at 1500 degrees C or 1650 degrees C for 2 or 12 h. The resulting microstructure consisted of alumina matrix grains and second-phase precipitates. Y-doped alumina samples sintered at 1550 degrees C for shorter times (<2 h) contained primarily YAlO3-YAP precipitates. This is in contradiction of the binary equilibrium phase diagram for Al2O3 and Y2O3, which predicts Y3Al5O12-YAG to be the first phase to appear, as the Y-concentration exceeds the solubility limit of alpha-Al2O3. The formation of YAG in co-existence with the YAP precipitates was observed in samples sintered at 1550 degrees C for 12 h and 1650 degrees C for 2 h. The excess of yttrium in the grain boundary was 5.5 +/- 0.9 Y-atoms/nm(2) for the specimen containing primarily YAP and 4.2 +/- 1.2 Y-atoms/nm(2) in samples where YAP and YAG co-existed. The study demonstrates that in samples containing multiple precipitates, the grain-boundary excess concentration of Y atoms is controlled by the composition of the precipitates.
C1 [Guelguen, Mehmet A.] Sabanci Univ, FENS, TR-34956 Istanbul, Turkey.
[Sturm, Saso] Jozef Stefan Inst, Dept Nanostruct Mat, Ljubljana, Slovenia.
[Cannon, Rowland M.] Univ Calif Berkeley, Lawrence Berkeley Lab, MSD, Berkeley, CA 94720 USA.
[Ruehle, Manfred] Max Planck Inst Met Res, Stuttgart, Germany.
RP Gulgun, MA (reprint author), Sabanci Univ, FENS, TR-34956 Istanbul, Turkey.
EM m-gulgun@sabanciuniv.edu
OI Sturm, Saso/0000-0003-0019-7491
FU Max Planck Society; EU [G5RD-CT-2001-00573]; Scientific Research and
Technology Council of Turkey (Tubitak) [105M123]
FX The work was supported by the Max Planck Society and the EU under the
EU-US project HIPERCOAT (Contract No G5RD-CT-2001-00573). Helpful
discussions with the late Rowland Cannon stimulated the progress. The
authors would like to express their gratitude to the European Union
Under the Framework 6 program, under a contract for an Integrated
Infrastructure Initiative. Reference 026019 ESTEEM. M. A. Gulgun
acknowledges Scientific Research and Technology Council of Turkey
(Tubitak) for financial support through the MAG-MHEST Grant #105M123.
The Slovenian Research Agency (ARRS) is also acknowledged by S. Sturm
for its financial support. The support by Ute Salzberger for specimen
preparation is greatly appreciated.
NR 30
TC 4
Z9 4
U1 0
U2 12
PU CARL HANSER VERLAG
PI MUNICH
PA KOLBERGERSTRASSE 22, POSTFACH 86 04 20, D-81679 MUNICH, GERMANY
SN 1862-5282
EI 2195-8556
J9 INT J MATER RES
JI Int. J. Mater. Res.
PD DEC
PY 2008
VL 99
IS 12
BP 1324
EP 1329
DI 10.3139/146.101767
PG 6
WC Metallurgy & Metallurgical Engineering
SC Metallurgy & Metallurgical Engineering
GA 392RO
UT WOS:000262320100003
ER
PT J
AU Sadayappan, M
Sahoo, M
Lavender, C
Jablonski, P
AF Sadayappan, M.
Sahoo, M.
Lavender, C.
Jablonski, P.
TI PERMANENT MOLD CASTING OF TITANIUM ALLOY TI-6AL-4V
SO INTERNATIONAL JOURNAL OF METALCASTING
LA English
DT Article
DE titanium alloy; casting defects; inclusion; porosity and mechanical
properties
AB A literature review indicated that data on the effect various casting defects, such as inclusions and porosity, oil the properties of titanium alloy castings were not readily available. This information is required to reduce the cost of fabricating titanium castings for potential automotive applications. To this end, a research project was initiated to develop data on the as-east properties of titanium alloy Ti-6Al-4V (Ti64). Step plate castings with 3.2, 6.3, 13 and 25 mm thick steps were produced in a high-density graphite mold following melting in an induction furnace with water-cooled copper hearth. The mechanical properties were determined in the as-cast condition and were found to be close to the values reported in standards. Few casting defects such as inclusions and porosity were observed, and the loss of strength due to these defects is not significant. It is shown that titanium castings with good mechanical properties can be produced in high-density graphite molds.
C1 [Sadayappan, M.; Sahoo, M.] CANMET MTL, Ottawa, ON, Canada.
[Lavender, C.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Jablonski, P.] US Bur Mines, Albany Res Ctr, Albany, OR 97321 USA.
RP Sadayappan, M (reprint author), CANMET MTL, Ottawa, ON, Canada.
FU Canadian Lightweight Materials Research Initiative (CLiMRI); US Dept. of
Energy
FX Financial support from the Canadian Lightweight Materials Research
Initiative (CLiMRI) and the US Dept. of Energy (through the Pacific
Northwest National Lab) is gratefully acknowledged. Our sincere thanks
for the CANMET Engineering and Technical Services staff for machining
the tensile specimens, NDT staff for X-ray work, B. Eagleson for
mechanical testing and R. Zavadil for rnetallography.
NR 6
TC 1
Z9 1
U1 0
U2 8
PU AMER FOUNDRY SOC INC
PI SCHAUMBURG
PA 1695 N PENNY LN, SCHAUMBURG, IL 60173-4555 USA
SN 1939-5981
J9 INT J METALCA ST
JI Int. J. Met.
PD WIN
PY 2008
VL 2
IS 1
BP 69
EP 74
PG 6
WC Metallurgy & Metallurgical Engineering
SC Metallurgy & Metallurgical Engineering
GA 482ZP
UT WOS:000268931300005
ER
PT J
AU Papenbrock, T
Weidenmuller, HA
AF Papenbrock, Thomas
Weidenmueller, Hans A.
TI PREPONDERANCE OF GROUND STATES WITH POSITIVE PARITY
SO INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS
LA English
DT Article
AB We investigate analytically and numerically a random-matrix model for m fermions occupying l(1) single-particle states with positive parity and l(2) single-particle states with negative parity and interacting through random two-body forces that conserve parity. The single-particle states are completely degenerate and carry no further quantum numbers. We compare spectra of many-body states with positive and with negative parity. We show that in the dilute limit defined by 1 << m << l(1), l(2), ground states with positive and with negative parity occur with equal probability. Differences in the ground-state probabilities are, thus, a finite-size effect and are mainly due to different dimensions of the Hilbert spaces of either parity.
C1 [Papenbrock, Thomas] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Papenbrock, Thomas] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37381 USA.
[Weidenmueller, Hans A.] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany.
RP Papenbrock, T (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
EM tpapenbr@utk.edu; Hans.Weidenmueller@mpi-hd.mpg.de
OI Papenbrock, Thomas/0000-0001-8733-2849
FU U.S. Department of Energy [DE-AC05-00OR22725]; UT-Battelle, LLC (Oak
Ridge National Laboratory); University of Tennessee [DE-FG02-96ER40963]
FX This work was partially supported by the U.S. Department of Energy under
Contract No. DE-AC05-00OR22725 with UT-Battelle, LLC (Oak Ridge National
Laboratory), and under Grant No. DE-FG02-96ER40963 (University of
Tennessee).
NR 10
TC 0
Z9 0
U1 0
U2 0
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0218-3013
J9 INT J MOD PHYS E
JI Int. J. Mod. Phys. E-Nucl. Phys.
PD DEC
PY 2008
VL 17
SU 1
BP 286
EP 291
DI 10.1142/S0218301308011926
PG 6
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA V28QB
UT WOS:000208694200024
ER
PT J
AU Mukherjee, RM
Crozier, PS
Plimpton, SJ
Anderson, KS
AF Mukherjee, Rudranarayan M.
Crozier, Paul S.
Plimpton, Steven J.
Anderson, Kurt S.
TI Substructured molecular dynamics using multibody dynamics algorithms
SO INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
LA English
DT Article
DE Coarse-grained molecular dynamics; Multibody dynamics algorithms;
Open-source software
ID ORDER-N-FORMULATION; NORMAL-MODE ANALYSIS; TIME-STEP METHODS;
CONFORMATIONAL-CHANGE; MOTION SIMULATION; DOMAIN MOTIONS; EWALD SUMS;
SYSTEMS; METHODOLOGY; INTEGRATION
AB This paper reports a new research effort aimed at using efficient multibody dynamics methods to simulate coarse-grained molecular systems. Various molecular systems are studied and the results of nanosecond-long simulations are analyzed to validate the method. The systems studied include bulk water, alkane chains, alanine dipeptide and carboxyl terminal fragments of calmodulin, ribosomal L7/L12 and rhodopsin proteins. The stability and validity of the simulations are studied through conservation of energy, thermodynamics properties and conformational analysis. In these simulations, a speed up of an order of magnitude is realized for conservative error bounds with a fixed timestep integration scheme. A discussion is presented on the open-source software developed to facilitate future research using multibody dynamics with molecular dynamics. Published by Elsevier Ltd.
C1 [Mukherjee, Rudranarayan M.; Anderson, Kurt S.] Rensselaer Polytech Inst, Troy, NY 12180 USA.
[Mukherjee, Rudranarayan M.; Crozier, Paul S.; Plimpton, Steven J.; Anderson, Kurt S.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Mukherjee, RM (reprint author), NASA Jet Prop Lab, Pasadena, CA USA.
EM Rudranarayan.M.Mukherjee@jpl.nasa.gov; pscrozi@sandia.gov;
sjplimp@sandia.gov; anderk5@rpi.edu
FU NSF-NIRT [0303902]; Sandia LDRD [67017]; United States Department of
Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
FX This work was supported in part by NSF-NIRT Grant 0303902 and by Sandia
LDRD 67017. 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. The authors thank the funding agencies for their
support.
NR 60
TC 19
Z9 19
U1 1
U2 8
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0020-7462
J9 INT J NONLIN MECH
JI Int. J. Non-Linear Mech.
PD DEC
PY 2008
VL 43
IS 10
BP 1040
EP 1055
DI 10.1016/j.ijnonlinmec.2008.04.003
PG 16
WC Mechanics
SC Mechanics
GA 389FS
UT WOS:000262077300004
ER
PT J
AU Camarero, JA
Kwon, YG
AF Camarero, Julio A.
Kwon, Youngeun
TI Traceless and Site-specific Attachment of Proteins onto Solid Supports
SO INTERNATIONAL JOURNAL OF PEPTIDE RESEARCH AND THERAPEUTICS
LA English
DT Article
CT Symposium on Modern Solid Phase Peptide Synthesis and its Applications
CY OCT 17-20, 2007
CL Port Douglas, AUSTRALIA
DE Protein chip; Protein trans-splicing; Split intein; Native chemical
ligation; Expressed protein ligation
ID SELF-ASSEMBLED MONOLAYERS; DIP-PEN NANOLITHOGRAPHY; IMMOBILIZATION
STRATEGIES; SELECTIVE IMMOBILIZATION; ANTIBODY ARRAYS; GLOBAL ANALYSIS;
MICROARRAYS; FABRICATION; PEPTIDES; LIGATION
AB Many experimental approaches in biology and biophysics, as well as applications in diagnosis and drug discovery, require proteins to be immobilized on solid supports. Protein microarrays, for example, provide a high-throughput format to study biomolecular interactions. The technique employed for protein immobilization is a key to the success of these applications. Recent biochemical developments are allowing, for the first time, the selective and traceless immobilization of proteins generated by cell-free systems without the need for purification and/or reconcentration prior to the immobilization step.
C1 [Camarero, Julio A.] Univ So Calif, Sch Pharm, Dept Pharmaceut Sci, Los Angeles, CA 90033 USA.
[Camarero, Julio A.; Kwon, Youngeun] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Camarero, JA (reprint author), Univ So Calif, Sch Pharm, Dept Pharmaceut Sci, 1985 Zonal Ave,PSC 616, Los Angeles, CA 90033 USA.
EM jcamarer@usc.edu
RI Camarero, Julio/A-9628-2015
NR 45
TC 5
Z9 5
U1 0
U2 5
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1573-3149
J9 INT J PEPT RES THER
JI Int. J. Pept. Res. Ther.
PD DEC
PY 2008
VL 14
IS 4
BP 351
EP 357
DI 10.1007/s10989-008-9161-0
PG 7
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 379VF
UT WOS:000261423600010
ER
PT J
AU Vorobiev, O
AF Vorobiev, Oleg
TI Generic strength model for dry jointed rock masses
SO INTERNATIONAL JOURNAL OF PLASTICITY
LA English
DT Article
DE Geological material; Rock; Constitutive behavior; Yield condition;
Plastic collapse
ID POROUS ROCK; CONSTITUTIVE MODEL; GRANULAR-MATERIALS; FAILURE MODE; CAP
MODEL; LIMESTONE; DEFORMATION; INTERFACES; BEHAVIOR; ELEMENT
AB A new nonlinear thermo-mechanical model for heavily jointed rock masses is presented. The model describes poroelasticity, shear-enhanced compaction and brittle-ductile transition in dry porous rocks. The key input parameters of the model, such as elastic moduli, tensile and compressive strength are expressed as functions of the reference porosity of the rock. These functions are based on empirical data for limestones and sandstones and assume that the medium is isotropic. The effect of joints is modeled by scaling down the key model parameters. The scaling rules are found with the help of explicit numerical modeling of randomly jointed media. (c) 2008 Elsevier Ltd. All rights reserved.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Vorobiev, O (reprint author), Lawrence Livermore Natl Lab, POB 808,7000 E Ave, Livermore, CA 94551 USA.
EM vorobiev1@llnl.gov
FU US Department of Energy; University of California; Lawrence Livermore
National Laboratory [W-7405-Eng-48]
FX This work was performed under the auspices of the US Department of
Energy by University of California, Lawrence Livermore National
Laboratory under Contract W-7405-Eng-48.; The author is grateful to
colleagues from computational physics group at LLNL: Tarabay Antoun,Joe
Morris, Ben Liu, Ilia Lomov, Randy Settgast, Scott Johnson, Lew Glenn,
and O.Walton.
NR 57
TC 20
Z9 21
U1 3
U2 17
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0749-6419
J9 INT J PLASTICITY
JI Int. J. Plast.
PD DEC
PY 2008
VL 24
IS 12
BP 2221
EP 2247
DI 10.1016/j.ijplas.2008.06.009
PG 27
WC Engineering, Mechanical; Materials Science, Multidisciplinary; Mechanics
SC Engineering; Materials Science; Mechanics
GA 381MZ
UT WOS:000261541900004
ER
PT J
AU Jayasekera, T
Pillalamarri, PK
Mintmire, JW
Meunier, V
AF Jayasekera, Thushari
Pillalamarri, Pavan K.
Mintmire, J. W.
Meunier, V.
TI Effect of Phase-Breaking Events on Electron Transport in Mesoscopic and
Nanodevices
SO INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
LA English
DT Article
DE ballistic transport; partial coherence; phase breaking; Buttiker
phase-breaking technique; Green's function
ID CARBON NANOTUBES; CONDUCTANCE; RESISTORS; DEVICES
AB Existing ballistic models for electron transport in mesoscopic and nanoscale systems break down as the size of the device becomes longer than the phase coherence length of electrons in the system. Krstic et al. experimentally observed that the Current in single-wall carbon nanotube systems can be regarded as a combination of a coherent part and a noncoherent part. In this article, we discuss the use of Buttiker phase-breaking technique to address partially coherent electron transport, generalize that to a multichannel problem, and then Study the effect of phase-breaking events on the electron transport in two-terminal graphene nanoribbon devices. We also investigate the difference between the pure-phase randomization and phase/momentum randomization boundary conditions. While momentum randomization adds an extra resistance caused by backward scattering, pure-phase randomization smooths the conductance oscillations because of interference. (C) 2008 Wiley Periodicals, Inc. Int J Quantum Chem 108: 2896-2905, 2008
C1 [Jayasekera, Thushari; Pillalamarri, Pavan K.; Mintmire, J. W.] Oklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA.
[Meunier, V.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
RP Jayasekera, T (reprint author), Oklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA.
EM thushar@okstate.edu
RI Jayasekera, Thushari /A-3626-2011; Meunier, Vincent/F-9391-2010;
OI Meunier, Vincent/0000-0002-7013-179X; Mintmire, John/0000-0002-6551-0349
FU U.S. Department of Energy [DEAC05-00OR22725, DE-FG02-07ER46362]; LLC
[DEAC05-00OR22725]
FX The present work was sponsored in part by the Laboratory Directed
Research and Development Program U.S. Department of Energy under
Contract No. DEAC05-00OR22725 with UT-Battetle, LLC at
DEAC05-00OR22725.; Contract grant sponsor: Department of Energy EPSCoR
Program. Contract grant number: DE-FG02-07ER46362.
NR 26
TC 3
Z9 3
U1 0
U2 9
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0020-7608
EI 1097-461X
J9 INT J QUANTUM CHEM
JI Int. J. Quantum Chem.
PD DEC
PY 2008
VL 108
IS 15
SI SI
BP 2896
EP 2905
DI 10.1002/qua.21834
PG 10
WC Chemistry, Physical; Mathematics, Interdisciplinary Applications;
Physics, Atomic, Molecular & Chemical
SC Chemistry; Mathematics; Physics
GA 364RV
UT WOS:000260353800018
ER
PT J
AU Yasui, LS
Andorf, C
Schneider, L
Kroc, T
Lennox, A
Saroja, KR
AF Yasui, Linda S.
Andorf, Christine
Schneider, Linda
Kroc, Thomas
Lennox, Arlene
Saroja, K. R.
TI Gadolinium neutron capture in glioblastoma multiforme cells
SO INTERNATIONAL JOURNAL OF RADIATION BIOLOGY
LA English
DT Article; Proceedings Paper
CT 6th International Symposium on Biophysical Aspects of Auger Processes
CY JUL 05-07, 2007
CL Harvard Med Sch, Boston, MD
HO Harvard Med Sch
DE Auger emitters; Glioblastoma cells; Gd neutron capture
ID RELATIVE BIOLOGICAL EFFECTIVENESS; HAMSTER OVARY CELLS; RADIOTHERAPY
BEAMS; GLIOMA-CELLS; P53 GENE; X-RAYS; THERAPY; RADIATION; DNA;
CYTOTOXICITY
AB Purpose: A proof of principle for cell killing by Gadolinium (Gd) neutron capture in Magnevist (R) preloaded Glioblastoma multiforme (GBM) cells is provided.
Materials and methods: U87cells were pre-loaded with 5 mg/ml Magnevist (R) (Gd containing compound) and irradiated using an enhanced neutron beam developed at NIU Institute for Neutron Therapy at Fermilab. These experiments were possible because of an enhanced fast neutron therapy assembly designed to use the fast neutron beam at Fermilab to deliver a neutron beam containing a greater fraction of thermal neutrons and because of the development of improved calculations for dose for the enhanced neutron beam. Clonogenic response was determined.
Results: U87 cell survival after gamma irradiation, fast neutron irradiation and irradiation with the enhanced neutron beam in the presence or absence of Magnevist (R) were determined.
Conclusions: U87 cells were the least sensitive to gamma radiation, and increasingly sensitive to fast neutron irradiation, irradiation with the enhanced neutron beam and finally a significant enhancement in cell killing was observed for U87 cells preloaded with Magnevist (R). The sensitivity of U87 cells pre-loaded with Magnevist (R) and then irradiated with the enhanced neutron beam can at least in part be attributed to the Auger electrons emitted by the neutron capture event.
C1 [Yasui, Linda S.] No Illinois Univ, Dept Biol Sci, De Kalb, IL 60115 USA.
[Andorf, Christine; Schneider, Linda; Saroja, K. R.] Fermilab Natl Accelerator Lab, NIU Inst Neutron Therapy, Batavia, IL USA.
RP Yasui, LS (reprint author), No Illinois Univ, Dept Biol Sci, MO 358, De Kalb, IL 60115 USA.
EM lyasui@niu.edu
NR 43
TC 8
Z9 8
U1 0
U2 5
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0955-3002
J9 INT J RADIAT BIOL
JI Int. J. Radiat. Biol.
PD DEC
PY 2008
VL 84
IS 12
BP 1130
EP 1139
DI 10.1080/09553000802538092
PG 10
WC Biology; Nuclear Science & Technology; Radiology, Nuclear Medicine &
Medical Imaging
SC Life Sciences & Biomedicine - Other Topics; Nuclear Science &
Technology; Radiology, Nuclear Medicine & Medical Imaging
GA 405KG
UT WOS:000263221300020
PM 19061138
ER
PT J
AU Rutqvist, J
Freifeld, B
Min, KB
Elsworth, D
Tsang, Y
AF Rutqvist, J.
Freifeld, B.
Min, K-B
Elsworth, D.
Tsang, Y.
TI Analysis of thermally induced changes in fractured rock permeability
during 8 years of heating and cooling at the Yucca Mountain Drift Scale
Test
SO INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
LA English
DT Article
DE Fractured rock; Permeability; Yucca Mountain; Thermal stress; Moisture
ID HEATER TEST; FLUID-FLOW; PREDICTIONS; TUFF
AB We analyzed a data set of thermally induced changes in fractured rock permeability during a 4-year heating (up to 200 degrees C) and subsequent 4-year cooling of a large volume, partially saturated and highly fractured volcanic tuff at the Yucca Mountain Drift Scale Test, Nevada, USA. Permeability estimates were derived from about 700 pneumatic (air-injection) tests, taken periodically at 44 packed-off borehole intervals during the heating and cooling cycle from November 1997 through November 2005. We analyzed air-permeability data by numerical modeling of thermally induced stress and moisture movements and their impact on air permeability within the highly fractured rock. Our analysis shows that changes in air permeability during the initial 4-year heating period, which were limited to about one order of magnitude, were caused by the combined effects of thermal-mechanically induced stress on fracture aperture and thermal-hydrologically induced changes in fracture moisture content. At the end of the subsequent 4-year cooling period, air-permeability decreases (to as low as 0.2 of initial) and increases (to as high as 1.8 of initial) were observed. By comparison to the calculated thermo-hydro-elastic model results, we identified these remaining increases or decreases in air permeability as irreversible changes in intrinsic fracture permeability, consistent with either inelastic fracture shear dilation (where permeability increased) or inelastic fracture surface-asperity shortening (where permeability decreased). In this paper, we discuss the possibility that such fracture asperity shortening and associated decrease in fracture permeability might be enhanced by dissolution of highly stressed surface asperities over years of elevated stress and temperature. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Rutqvist, J.; Freifeld, B.; Tsang, Y.] Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
[Min, K-B; Elsworth, D.] Penn State Univ, Dept Energy & Geoenvironm Engn, University Pk, PA 16802 USA.
RP Rutqvist, J (reprint author), Lawrence Berkeley Lab, Div Earth Sci, MS 90-1116, Berkeley, CA 94720 USA.
EM Jrutqvist@lbl.gov
RI Freifeld, Barry/F-3173-2010; Min, Ki-Bok/B-5374-2008; Elsworth,
Derek/D-2844-2015; Rutqvist, Jonny/F-4957-2015
OI Min, Ki-Bok/0000-0001-7463-7395; Elsworth, Derek/0000-0002-4942-1151;
Rutqvist, Jonny/0000-0002-7949-9785
FU Office of Civilian Radioactive Waste Management; Office of the Chief
Scientist, of the US Department of Energy [DE-AC02-05CH11231]
FX We are grateful for reviews by Hui-Hai Liu and Dan Hawkes of Lawrence
Berkeley National Laboratory, which substantially improved this paper.
The work was supported by the Office of Civilian Radioactive Waste
Management, Office of the Chief Scientist, of the US Department of
Energy under Contract no. DE-AC02-05CH11231.
NR 18
TC 24
Z9 28
U1 3
U2 11
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1365-1609
J9 INT J ROCK MECH MIN
JI Int. J. Rock Mech. Min. Sci.
PD DEC
PY 2008
VL 45
IS 8
BP 1373
EP 1389
DI 10.1016/j.ijrmms.2008.01.016
PG 17
WC Engineering, Geological; Mining & Mineral Processing
SC Engineering; Mining & Mineral Processing
GA 372UC
UT WOS:000260926500013
ER
PT J
AU Breznak, JA
Warnecke, F
AF Breznak, John A.
Warnecke, Falk
TI Spirochaeta cellobiosiphila sp nov., a facultatively anaerobic, marine
spirochaete
SO INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
LA English
DT Article
ID SP-N; TERMITE GUTS; CALIFORNIA; HABITATS; AURANTIA; ARB
AB A facultatively anaerobic, marine spirochaete, designated strain SIP1(T), was isolated from interstitial water from a cyanobacteria-containing microbial mat. Cells of strain SIP1(T) were 0.3-0.4x10-12 mu m in size, helical with a body pitch of approximately 1.4 mu m and motile by means of two to four periplasmic flagella (one, or occasionally two, being inserted near each end of the cell). Cells were catalase-negative and used a variety of monosaccharides and disaccharides and pectin as energy sources, growing especially well on cellobiose. Neither organic acids nor amino acids were utilized as energy sources. One or more amino acids in tryptone and one or more components of yeast extract were required for growth. Growth was observed at 9-37 degrees C (optimally at or near 37 degrees C), at initial pH 5-8 (optimally at initial pH 7.5) and in media prepared with 20-100% (v/v) seawater (optimally at 60-80%) or 0.10-1.00 M NaCl (optimally at 0.30-0.40 M). The products of cellobiose fermentation were acetate, ethanol, CO(2), H(2) and small amounts of formate. Aerated cultures performed incomplete oxidation of cellobiose to acetate (and, presumably, COO plus small amounts of ethanol and formate, but exhibited a Y(cellobiose) that was only slightly greater than that of cellobiose-fermenting anoxic cultures. The G + C content of the genomic DNA of strain SIP1(T) was 41.4 mol%, the lowest among known spirochaetas. On the basis of its 16S rRNA gene sequence, strain SIP1(T) was grouped among other members of the genus Spirochaeta, but it bore only 89 % similarity with respect to its closest known relatives, Spirochaeta litoralis and Spirochaeta isovalerica, two marine obligate anaerobes. On the basis of its phenotypic properties and phylogenetic position, strain SIP1(T) represents a novel species of the genus Spirochaeta, for which the name Spirochaeta cellobiosiphila sp. nov. is proposed. The type strain is SIP1(T) (=ATCC BAA-1285(T) =DSM 17781(T)).
C1 [Breznak, John A.] Michigan State Univ, Dept Microbiol & Mol Genet, E Lansing, MI 48824 USA.
[Warnecke, Falk] DOE Joint Genome Inst, Microbial Ecol Program, Walnut Creek, CA 94598 USA.
RP Breznak, JA (reprint author), Michigan State Univ, Dept Microbiol & Mol Genet, E Lansing, MI 48824 USA.
EM breznak@msu.edu
FU NSF [0415401]; DOE [DE-FG02-85ER13361]; Gordon and Betty Moore
Foundation
FX Portions of this work were done during the 2004 Microbial Diversitv
Summer Course at the Marine Biological Laboratory, Woods Hole (MA, USA)
co-directed by T. M. Schmidt and W. W. Metcalf and funded by grants from
the NSF (0415401), the DOE (DE-FG02-85ER13361) and the Gordon and Betty
Moore Foundation. We thank J. Waterbury (Woods Hole Oceanographic
Institution) for Providing a portion of the microbial mat from
which;train SIP1T was isolated, J. McKinlay for performing
sonic of the HPLC analyses of metabolic products, S. Eichorst and J.
Wertz for analysing the DNA G+C content, A. Pastor ( Michigan State
University Center for Advanced Microscopy) for performing electron
microscopy and Professor Dr H. G. Truper for help with the nomenclature
and Latinization of the species name.
NR 25
TC 9
Z9 9
U1 3
U2 8
PU SOC GENERAL MICROBIOLOGY
PI READING
PA MARLBOROUGH HOUSE, BASINGSTOKE RD, SPENCERS WOODS, READING RG7 1AG,
BERKS, ENGLAND
SN 1466-5026
J9 INT J SYST EVOL MICR
JI Int. J. Syst. Evol. Microbiol.
PD DEC
PY 2008
VL 58
BP 2762
EP 2768
DI 10.1099/ijs.0.2008/001263-0
PG 7
WC Microbiology
SC Microbiology
GA 390ZX
UT WOS:000262203300016
PM 19060054
ER
PT J
AU Ogden, P
Podesta, J
Deutch, J
AF Ogden, Peter
Podesta, John
Deutch, John
TI A new strategy to spur energy innovation
SO ISSUES IN SCIENCE AND TECHNOLOGY
LA English
DT Article
C1 [Ogden, Peter] Ctr Amer Progress, Washington, DC 20005 USA.
[Deutch, John] US DOE, Washington, DC 20585 USA.
[Deutch, John] Cent Intelligence Agcy, Washington, DC 20505 USA.
[Deutch, John] MIT, Cambridge, MA 02139 USA.
RP Ogden, P (reprint author), Ctr Amer Progress, Washington, DC 20005 USA.
EM pogden@americanprogress.org; JMD@mit.edu
NR 0
TC 4
Z9 4
U1 0
U2 0
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0748-5492
J9 ISSUES SCI TECHNOL
JI Issues Sci. Technol.
PD WIN
PY 2008
VL 24
IS 2
BP 35
EP 44
PG 10
WC Engineering, Multidisciplinary; Engineering, Industrial;
Multidisciplinary Sciences; Social Issues
SC Engineering; Science & Technology - Other Topics; Social Issues
GA 249PT
UT WOS:000252241900018
ER
PT J
AU Long, JCS
AF Long, Jane C. S.
TI A blind man's guide to energy policy
SO ISSUES IN SCIENCE AND TECHNOLOGY
LA English
DT Article
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Long, JCS (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM jcslong@llnl.gov
NR 0
TC 2
Z9 2
U1 0
U2 0
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0748-5492
J9 ISSUES SCI TECHNOL
JI Issues Sci. Technol.
PD WIN
PY 2008
VL 24
IS 2
BP 51
EP 56
PG 6
WC Engineering, Multidisciplinary; Engineering, Industrial;
Multidisciplinary Sciences; Social Issues
SC Engineering; Science & Technology - Other Topics; Social Issues
GA 249PT
UT WOS:000252241900020
ER
PT J
AU Gsell, S
Schreck, M
Brescia, R
Stritzker, B
Arendt, PN
Groves, JR
AF Gsell, Stefan
Schreck, Matthias
Brescia, Rosaria
Stritzker, Bernd
Arendt, Paul N.
Groves, James R.
TI Iridium on Biaxially Textured Oxide Templates: A Concept to Grow Single
Crystals on Arbitrary Substrates
SO JAPANESE JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE ion beam assisted deposition; biaxial texture; single crystals;
heteroepitaxy; X-ray diffraction; MgO; iridium; diamond
ID BUFFER LAYERS; DIAMOND FILMS; COATED CONDUCTORS; SILICON; ORIENTATION;
ROUTE
AB Ion beam assisted deposition (IBAD) allows a biaxial texturing of oxide layers on polycrystalline or amorphous substrates. Even the best layers still contain an in-plane angular spread of about 4 degrees. We report here a method to grow Ir films oil top of with a factor of 5 lower misorientation. It is shown that the huge texture improvement involves a massive these oxide layers realignment of the iridium islands and in orientation averaging process. Heteroepitaxial diamond was successfully deposited oil the Ir/IBAD-MgO multilayer stacks. The described texture improvement by irichum layers provides a general concept towards single crystal growth on arbitrary substrates. [DOI: 10.1143/JJAP.47.8925]
C1 [Gsell, Stefan; Schreck, Matthias; Brescia, Rosaria; Stritzker, Bernd] Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany.
[Arendt, Paul N.; Groves, James R.] Los Alamos Natl Lab, Superconduct Technol Ctr, Los Alamos, NM 87545 USA.
RP Gsell, S (reprint author), Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany.
EM Matthias.Schreck@physik.uni-augsburg.de
RI Brescia, Rosaria/D-9507-2011; Schreck, Matthias/P-9695-2016
OI Schreck, Matthias/0000-0003-1805-6929
FU European community within the training network DRIVE
[MRTN-CT-2004-512224]; STREP [NMP4-CT-2004-013817]
FX We gratefully acknowledge financial support of this work by the European
community within the training network DRIVE (R.B., MRTN-CT-2004-512224)
and the STREP project NANOMESH (S.G., NMP4-CT-2004-013817).
NR 17
TC 4
Z9 4
U1 1
U2 9
PU JAPAN SOCIETY APPLIED PHYSICS
PI TOKYO
PA KUDAN-KITA BUILDING 5TH FLOOR, 1-12-3 KUDAN-KITA, CHIYODA-KU, TOKYO,
102-0073, JAPAN
SN 0021-4922
J9 JPN J APPL PHYS
JI Jpn. J. Appl. Phys.
PD DEC
PY 2008
VL 47
IS 12
BP 8925
EP 8927
DI 10.1143/JJAP.47.8925
PG 3
WC Physics, Applied
SC Physics
GA 389RA
UT WOS:000262111000056
ER
PT J
AU Caballero, FG
Miller, MK
Garcia-Mateo, C
Capdevila, C
de Andres, C
AF Caballero, F. G.
Miller, M. K.
Garcia-Mateo, C.
Capdevila, C.
Garcia de Andres, C.
TI Phase transformation theory: A powerful tool for the design of advanced
steels
SO JOM
LA English
DT Article
ID LOW-ALLOY STEELS; COMPOSITION PROPERTY APPROACH; STRENGTH BAINITIC
STEELS; SILICON STEELS; MARTENSITE; DIAGRAMS
AB An innovative design procedure based on phase transformation theory alone has been successfully applied to design steels with a microstructure consisting of a mixture of bainitic ferrite, retained austenite, and some martensite. An increase in the amount of bainitic ferrite is needed in order to avoid the presence of large regions of untransformed austenite, which under stress decompose to brittle martensite. The design procedure addresses this diffi culty by adjusting the T'(o) curve to greater carbon concentrations with the use of substitutional solutes such as manganese and chromium. The concepts of bainite transformation theory can be exploited even further to design steels with strength in excess of 2.5 GPa and considerable toughness.
C1 [Caballero, F. G.; Garcia-Mateo, C.; Capdevila, C.; Garcia de Andres, C.] CENIM CSIC, E-28040 Madrid, Spain.
[Miller, M. K.] Oak Ridge Natl Lab, Mat Sci & Technol Lab, Oak Ridge, TN 37831 USA.
RP Caballero, FG (reprint author), CENIM CSIC, Avda Gregorio Amo 8, E-28040 Madrid, Spain.
EM fgc@cenim.csic.es
RI CABALLERO, FRANCISCA/A-4292-2008; Capdevila, Carlos/B-6970-2015;
Garcia-Mateo, Carlos/A-7752-2008;
OI Capdevila, Carlos/0000-0002-1869-4085; Garcia-Mateo,
Carlos/0000-0002-4773-5077; Caballero, Francisca/0000-0002-5548-7659
FU Spanish Ministerio de Ciencia y Tecnologia Plan Nacional
[MAT2007-63873]; Oak Ridge National Laboratory SHaRE User Facility;
Scientific User Facilities Division; Office of Basic Energy Sciences, U.
S. Department of Energy
FX The authors gratefully acknowledge the support of Spanish Ministerio de
Ciencia y Tecnologia Plan Nacional de I+D+I (2004-2007) funding this
research under the contract MAT2007-63873. All of the authors want to
thank Arcelor Research for manufacturing the designed alloys. Research
at the Oak Ridge National Laboratory SHaRE User Facility was sponsored
by the Scientific User Facilities Division, Office of Basic Energy
Sciences, U. S. Department of Energy. The authors also would like to
express their special acknowledgement to Prof. H. K. D. H. Bhadeshia for
helpful discussions.
NR 21
TC 9
Z9 9
U1 2
U2 6
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1047-4838
J9 JOM-US
JI JOM
PD DEC
PY 2008
VL 60
IS 12
BP 16
EP 21
DI 10.1007/s11837-008-0159-z
PG 6
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Mineralogy; Mining & Mineral Processing
SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy;
Mining & Mineral Processing
GA 383RQ
UT WOS:000261691500003
ER
PT J
AU Barker, JG
Mildner, DFR
Rodriguez, JA
Thiyagarajan, P
AF Barker, J. G.
Mildner, D. F. R.
Rodriguez, J. A.
Thiyagarajan, P.
TI Neutron transmission of single-crystal magnesium fluoride
SO JOURNAL OF APPLIED CRYSTALLOGRAPHY
LA English
DT Article
ID FILTERS; SCATTERING; DIFFRACTOMETER; SILICON; NIST
AB The neutron attenuation through single-crystal magnesium fluoride has been measured as a function of wavelength at both room temperature and 77 K. These data confirm a total cross section that is lower than that of MgO for wavelengths greater than 0.2 nm. MgF(2) cooled to 77 K is a slightly better filter of epithermal neutrons than MgO for obtaining a thermal neutron beam. (C) 2008 International Union of Crystallography Printed in Singapore - all rights reserved
C1 [Barker, J. G.; Mildner, D. F. R.; Rodriguez, J. A.] NIST, Gaithersburg, MD 20899 USA.
[Rodriguez, J. A.] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20740 USA.
[Thiyagarajan, P.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Barker, JG (reprint author), NIST, Gaithersburg, MD 20899 USA.
EM john.barker@nist.gov
RI Rodriguez-Rivera, Jose/A-4872-2013
OI Rodriguez-Rivera, Jose/0000-0002-8633-8314
FU US Department of Energy, BES [DE-AC02-06CH11357]; National Science
Foundation [DMR-0454672]
FX We thank Denis Wozniak for his assistance in the SAND experiments at
IPNS funded by the US Department of Energy, BES, under contract No.
DE-AC02-06CH11357 to UChicago Argonne, LLC, and Juscelino Leao and John
Copley on DCS at the NCNR for aid in setting up the close cycle
refrigerator and data analysis. The elements of this work utilizing the
DCS, PCD and NG3 30 m SANS instruments at the NCNR are supported in part
by the National Science Foundation under agreement No. DMR-0454672.
NR 23
TC 9
Z9 9
U1 0
U2 3
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0021-8898
J9 J APPL CRYSTALLOGR
JI J. Appl. Crystallogr.
PD DEC
PY 2008
VL 41
BP 1003
EP 1008
DI 10.1107/S0021889808032858
PN 6
PG 6
WC Chemistry, Multidisciplinary; Crystallography
SC Chemistry; Crystallography
GA 373WM
UT WOS:000261004200004
ER
PT J
AU Geandier, G
Renault, PO
Teat, S
Le Bourhis, E
Lamongie, B
Goudeau, P
AF Geandier, Guillaume
Renault, Pierre-Olivier
Teat, Simon
Le Bourhis, Eric
Lamongie, Bruno
Goudeau, Philippe
TI Benefits of two-dimensional detectors for synchrotron X-ray diffraction
studies of thin film mechanical behavior
SO JOURNAL OF APPLIED CRYSTALLOGRAPHY
LA English
DT Article
ID ELASTIC PROPERTIES; NANOCRYSTALLINE METALS; MICRO-DIFFRACTION;
RESIDUAL-STRESSES; W/CU MULTILAYERS; DEFORMATION; TEXTURE; STRAIN; SIZE;
POLYCRYSTALS
AB Performing a complete in situ mechanical property analysis of polycrystalline thin films using X-ray diffraction is time consuming with most standard diffraction beamlines at synchrotron facilities and not realistic with laboratory diffractometers. Two-dimensional detection is shown to enable relatively fast and reliable X-ray strain measurements during in situ tensile testing of gold films deposited on polyimide substrates. Advantages and drawbacks in the use of two-dimensional detectors for this type of analysis are discussed for two commonly used geometries: reflection and transmission. (C) 2008 International Union of Crystallography Printed in Singapore - all rights reserved
C1 [Geandier, Guillaume; Renault, Pierre-Olivier; Le Bourhis, Eric; Lamongie, Bruno; Goudeau, Philippe] Univ Poitiers, CNRS, Phys Mat Lab, UMR 6630, F-86962 Futuroscope, France.
[Teat, Simon] Adv Light Source, Berkeley, CA 94720 USA.
RP Geandier, G (reprint author), Univ Poitiers, CNRS, Phys Mat Lab, UMR 6630, SP2MI,Blvd Marie & Pierre Curie,BP 30179, F-86962 Futuroscope, France.
EM guillaume.geandier@univ-poitiers.fr
RI Le Bourhis, Eric/B-4568-2013;
OI Le Bourhis, Eric/0000-0003-0902-5899; renault, pierre
olivier/0000-0002-0736-2333
FU US Department of Energy [DE-AC02-05CH11231]
FX This work was carried out within the framework of a Pnano project
entitled 'Cmonano' supported by the French ANR agency. We acknowledge
the Advanced Light Source for providing beamtime on beamline 11.3.1. The
Advanced Light Source is supported by the Director, Office of Science,
Office of Basic Energy Sciences, of the US Department of Energy under
contract No. DE-AC02-05CH11231.
NR 50
TC 13
Z9 14
U1 0
U2 5
PU INT UNION CRYSTALLOGRAPHY
PI CHESTER
PA 2 ABBEY SQ, CHESTER, CH1 2HU, ENGLAND
SN 1600-5767
J9 J APPL CRYSTALLOGR
JI J. Appl. Crystallogr.
PD DEC
PY 2008
VL 41
BP 1076
EP 1088
DI 10.1107/S0021889808030823
PN 6
PG 13
WC Chemistry, Multidisciplinary; Crystallography
SC Chemistry; Crystallography
GA 373WM
UT WOS:000261004200013
ER
PT J
AU Zhao, YS
Zhang, JZ
AF Zhao, Yusheng
Zhang, Jianzhong
TI Microstrain and grain-size analysis from diffraction peak width and
graphical derivation of high-pressure thermomechanics
SO JOURNAL OF APPLIED CRYSTALLOGRAPHY
LA English
DT Article
ID RAY MICROBEAM MEASUREMENTS; NANOCRYSTALLINE MATERIALS; INELASTIC
DEFORMATION; SILICON-CARBIDE; YIELD STRENGTH; POWDER; STRAIN;
DISLOCATIONS; ENHANCEMENT; TEMPERATURE
AB An analytical method is presented for deriving the thermomechanical properties of polycrystalline materials under high-pressure (P) and high-temperature (T) conditions. This method deals with non-uniform stress among heterogeneous crystal grains and surface strain in nanocrystalline materials by examining peak-width variation under different P-T conditions. Because the method deals directly with lattice d spacing and local deformation caused by stress, it can be applied to process any diffraction profile, independent of detection mode. In addition, a correction routine is developed using diffraction elastic ratios to deal with severe surface strain and/or strain anisotropy effects related to nano-scale grain sizes, so that significant data scatter can be reduced in a physically meaningful way. Graphical illustration of the resultant microstrain analysis can identify micro/local yields at the grain-to-grain interactions resulting from high stress concentration, and macro/bulk yield of the plastic deformation over the entire sample. This simple and straightforward approach is capable of revealing the corresponding micro and/or macro yield stresses, grain crushing or growth, work hardening or softening, and thermal relaxation under high-P-T conditions, as well as the intrinsic residual strain and/or surface strain in the polycrystalline bulk. In addition, this approach allows the instrumental contribution to be illustrated and subtracted in a straightforward manner, thus avoiding the potential complexities and errors resulting from instrument correction. Applications of the method are demonstrated by studies of alpha-SiC (6H, moissanite) and of micro- and nanocrystalline nickel by synchrotron X-ray and time-of-flight neutron diffraction.
C1 [Zhao, Yusheng; Zhang, Jianzhong] Los Alamos Natl Lab, LANSCE Div, Los Alamos, NM 87545 USA.
RP Zhao, YS (reprint author), Los Alamos Natl Lab, LANSCE Div, POB 1663, Los Alamos, NM 87545 USA.
EM yzhao@lanl.gov
RI Lujan Center, LANL/G-4896-2012;
OI Zhang, Jianzhong/0000-0001-5508-1782
FU Department of Energy [DE-AC52-06NA25396]; National Science Foundation
[EAR 01-35554]
FX We are grateful to two anonymous referees for pointing out the errors in
correlating FWHM and s in equation ( 1), and for other comments that
helped to improve the manuscript. This research was supported by Los
Alamos National Laboratory, which is operated by Los Alamos National
Security LLC under the Department of Energy, contract No.
DE-AC52-06NA25396. The high-temperature neutron experiments were
performed on the HIPPO beamline of the Lujan Neutron Scattering Center
at LANSCE, which is funded by the Department of Energy's Office of Basic
Energy Sciences. The high-P -T X-ray diffraction experiments were
carried out on the X17B2 beamline of the National Synchrotron Light
Source, Brookhaven National Laboratory, which is supported by the
Consortium for Materials Properties Research in Earth Sciences (COMPRES)
under the National Science Foundation Cooperative Agreement EAR
01-35554.
NR 44
TC 34
Z9 34
U1 1
U2 14
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0021-8898
J9 J APPL CRYSTALLOGR
JI J. Appl. Crystallogr.
PD DEC
PY 2008
VL 41
BP 1095
EP 1108
DI 10.1107/S0021889808031762
PN 6
PG 14
WC Chemistry, Multidisciplinary; Crystallography
SC Chemistry; Crystallography
GA 373WM
UT WOS:000261004200015
ER
PT J
AU Alkire, RW
Duke, NEC
Rotella, FJ
AF Alkire, R. W.
Duke, N. E. C.
Rotella, F. J.
TI Is your cold-stream working for you or against you? An in-depth look at
temperature and sample motion
SO JOURNAL OF APPLIED CRYSTALLOGRAPHY
LA English
DT Article
ID MACROMOLECULAR CRYOCRYSTALLOGRAPHY
AB It is normally assumed that a commercial gaseous nitrogen cold-stream provides a sample environment near 100 K and that the force of the cold-stream does not induce movement in the sample. As might be expected, the reality is much more complex. Here, an investigation of one cold-stream, starting with the temperature profile, is presented. Using silicon single crystals and flexible mounting loops, an approximate force/vibration profile of the cold-stream is obtained. Results indicate that the center of the temperature profile is offset from the position suggested by the manufacturer-supplied alignment tool and coincides with the area within the cold-stream that has the most consistent force profile. Tests indicate that this region is only about one-third of the width of the cold-stream nozzle opening. To verify that the results were relevant to protein crystallographic data collection, the impact of cold-stream position on the final data quality for lysozyme crystals was analyzed. On the basis of the observations it is recommended that users perform a temperature profile of their cold-streams to ensure proper alignment instead of relying only on the alignment tool for setup. In addition, suggestions are made on what users can look for in data processing to identify problems with loop movement and what users can do to minimize the impact of these problems on their experiments. (C) 2008 International Union of Crystallography Printed in Singapore - all rights reserved
C1 [Alkire, R. W.; Duke, N. E. C.; Rotella, F. J.] Argonne Natl Lab, Struct Biol Ctr, Argonne, IL 60439 USA.
RP Alkire, RW (reprint author), Argonne Natl Lab, Struct Biol Ctr, Argonne, IL 60439 USA.
EM alkire@anl.gov
NR 7
TC 14
Z9 14
U1 0
U2 2
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0021-8898
J9 J APPL CRYSTALLOGR
JI J. Appl. Crystallogr.
PD DEC
PY 2008
VL 41
BP 1122
EP 1133
DI 10.1107/S0021889808032536
PN 6
PG 12
WC Chemistry, Multidisciplinary; Crystallography
SC Chemistry; Crystallography
GA 373WM
UT WOS:000261004200018
ER
PT J
AU Biegalski, MD
Fong, DD
Eastman, JA
Fuoss, PH
Streiffer, SK
Heeg, T
Schubert, J
Tian, W
Nelson, CT
Pan, XQ
Hawley, ME
Bernhagen, M
Reiche, P
Uecker, R
Trolier-McKinstry, S
Schlom, DG
AF Biegalski, M. D.
Fong, D. D.
Eastman, J. A.
Fuoss, P. H.
Streiffer, S. K.
Heeg, T.
Schubert, J.
Tian, W.
Nelson, C. T.
Pan, X. Q.
Hawley, M. E.
Bernhagen, M.
Reiche, P.
Uecker, R.
Trolier-McKinstry, S.
Schlom, D. G.
TI Critical thickness of high structural quality SrTiO3 films grown on
orthorhombic (101) DyScO3
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID FERROELECTRIC THIN-FILMS; CRYSTAL DIFFRACTION PATTERNS; MOLECULAR-BEAM
EPITAXY; X-RAY; STRONTIUM-TITANATE; SURFACE-MORPHOLOGY;
PHASE-TRANSITIONS; THERMAL-EXPANSION; STRAIN; TEMPERATURE
AB Strained epitaxial SrTiO3 films were grown on orthorhombic (101) DyScO3 substrates by reactive molecular-beam epitaxy. The epitaxy of this substrate/film combination is cube on cube with a pseudocubic out-of-plane (001) orientation. The strain state and structural perfection of films with thicknesses ranging from 50 to 1000 were examined using x-ray scattering. The critical thickness at which misfit dislocations was introduced was between 350 and 500. These films have the narrowest rocking curves (full width at half maximum) ever reported for any heteroepitaxial oxide film (0.0018 degrees). Only a modest amount of relaxation is seen in films exceeding the critical thicknesses even after postdeposition annealing at 700 degrees C in 1 atm of oxygen. The dependence of strain relaxation on crystallographic direction is attributed to the anisotropy of the substrate. These SrTiO3 films show structural quality more typical of semiconductors such as GaAs and silicon than perovskite materials; their structural relaxation behavior also shows similarity to that of compound semiconductor films. (c) 2008 American Institute of Physics. [DOI: 10.1063/1.3037216]
C1 [Biegalski, M. D.; Trolier-McKinstry, S.; Schlom, D. G.] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA.
[Fong, D. D.; Eastman, J. A.; Fuoss, P. H.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Streiffer, S. K.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
[Heeg, T.; Schubert, J.] Forschungszentrum Julich, Inst Bio & Nanosyst IT IBN1, D-52425 Julich, Germany.
[Heeg, T.; Schubert, J.] Forschungszentrum Julich, Ctr Nanoelect Syst Informat Technol Cni, D-52425 Julich, Germany.
[Tian, W.; Nelson, C. T.; Pan, X. Q.] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48019 USA.
[Hawley, M. E.] Los Alamos Natl Lab, Mat Sci & Technol Div MST 8, Los Alamos, NM 87545 USA.
[Bernhagen, M.; Reiche, P.; Uecker, R.] Inst Crystal Growth, D-12489 Berlin, Adlershof, Germany.
RP Biegalski, MD (reprint author), Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37830 USA.
EM bdus2@psu.edu
RI Schaff, William/B-5839-2009; Eastman, Jeffrey/E-4380-2011; Schlom,
Darrell/J-2412-2013; Schubert, Jurgen/K-9543-2013;
OI Schlom, Darrell/0000-0003-2493-6113; Schubert,
Jurgen/0000-0003-0185-6794; Eastman, Jeff/0000-0002-0847-4265;
Trolier-McKinstry, Susan/0000-0002-7267-9281
FU National Science Foundation [DMR-0507146]; Department of Energy
[DE-FG02-07ER46416]; Office of Naval Research (ONR) [N00014-03-1-0721];
U. S. Department of Energy, Office of Science, Basic Energy Sciences
[DE-AC02-06CH11357]
FX The authors gratefully acknowledge helpful discussions with D. H. A.
Blank, S. P. Baker, and V. Vaithyanathan, the use of the Center for
Nanoscale Materials and Advanced Photon Source at Argonne National
Laboratory, and the financial support of the National Science Foundation
through Grant No. DMR-0507146, the Department of Energy through Grant
No. DE-FG02-07ER46416, and the Office of Naval Research (ONR) though
Grant No. N00014-03-1-0721 monitored by Dr. Colin Wood. Work at Argonne
was supported by the U. S. Department of Energy, Office of Science,
Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
NR 70
TC 36
Z9 36
U1 2
U2 57
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 DEC 1
PY 2008
VL 104
IS 11
AR 114109
DI 10.1063/1.3037216
PG 11
WC Physics, Applied
SC Physics
GA 393HI
UT WOS:000262364000120
ER
PT J
AU Chroneos, A
Grimes, RW
Bracht, H
Uberuaga, BP
AF Chroneos, A.
Grimes, R. W.
Bracht, H.
Uberuaga, B. P.
TI Engineering the free vacancy and active donor concentrations in
phosphorus and arsenic double donor-doped germanium
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID DIFFUSION; SILICON; MECHANISM; GE
AB In germanium, donor atoms migrate or form larger immobile clusters via their interaction with lattice vacancies. By engineering the concentration of free vacancies, it is possible to control the diffusion of the donor atoms and the formation of those larger clusters that lead to the deactivation of a significant proportion of the donor atoms. Electronic structure calculations in conjunction with mass action analysis are used to predict the concentrations of free vacancies and deactivated donor atoms in germanium doped with different proportions of arsenic and phosphorous. We find, for example, that at low temperatures, the concentration of free vacancies is partially suppressed by increasing the proportion of arsenic doping, whereas at high temperatures (above 1000 K), the concentration of free vacancies is relatively constant irrespective of the donor species. It is predicted that the free vacancy and active donor concentrations vary linearly with the arsenic to phosphorous ratio across a wide range of temperatures. (C) 2008 American Institute of Physics.
C1 [Chroneos, A.; Grimes, R. W.] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England.
[Bracht, H.] Univ Munster, Inst Mat Phys, D-48149 Munster, Germany.
[Uberuaga, B. P.] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
RP Chroneos, A (reprint author), Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England.
EM alexander.chroneos@imperial.ac.uk
OI Chroneos, Alex/0000-0002-2558-495X
FU U.S. Department of Energy, Office of Basic Energy Sciences; Deutsche
Forschungsgemeinschaft; Los Alamos National Laboratory; Los Alamos
National Security, LLC; National Nuclear Security Administration of the
U.S. Department of Energy [DE-AC52-06NA25396]
FX Computing resources were provided by the HPC facility of Imperial
College London. B.P.U. acknowledges support from the U.S. Department of
Energy, Office of Basic Energy Sciences and H. B. from the Deutsche
Forschungsgemeinschaft. 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. Department of Energy under Contract No. DE-AC52-06NA25396.
NR 25
TC 23
Z9 23
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 DEC 1
PY 2008
VL 104
IS 11
AR 113724
DI 10.1063/1.3035847
PG 4
WC Physics, Applied
SC Physics
GA 393HI
UT WOS:000262364000089
ER
PT J
AU Dattelbaum, DM
Sheffield, SA
Stahl, D
Weinberg, M
Neel, C
Thadhani, N
AF Dattelbaum, Dana M.
Sheffield, Stephen A.
Stahl, David
Weinberg, Michael
(Kit) Neel, Christopher
Thadhani, Naresh
TI Equation of state and high pressure properties of a fluorinated
terpolymer: THV 500
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID X-RAY-DIFFRACTION; CRYSTAL-STRUCTURE; POLYTETRAFLUOROETHYLENE TEFLON;
LAMELLAR MORPHOLOGY; VINYLIDENE FLUORIDE; RAMAN-SPECTROSCOPY; SHOCK
COMPRESSION; PHASE-TRANSITION; TETRAFLUOROETHYLENE; COPOLYMERS
AB We present the results of an investigation of the static compressive and dynamic (shock) responses of a fluorinated terpolymer of tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride (Dyneon THV 500), in an effort to further understand its behavior under static and dynamic high pressures, and elucidate its equation of state properties. Fluorinated polymers, and, in particular, their copolymers, have garnered increasing attention by the static high pressure and shock wave communities, due to their widespread use in engineering applications, and formulation into energetic materials as binders. Shock wave compression experiments performed at two laboratories showed good consistency, and provide the first Hugoniot data for this fluorinated terpolymer. The Hugoniot of THV 500 is in general agreement with that of the related fluoropolymers polytetrafluoroethylene and poly (chlorotrifluoroethylene-co-vinylidene fluoride), reported previously. The static compressive data, combined with measurement of the ambient pressure thermodynamic parameters, have been used to formulate an equation of state based on the Helmholtz free energy, which was shown to adequately represent the dynamic response of the polymer to similar to 5 GPa. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2980338]
C1 [Dattelbaum, Dana M.; Sheffield, Stephen A.; Stahl, David; Weinberg, Michael] Los Alamos Natl Lab, Dynam & Energet Mat Div, Los Alamos, NM 87545 USA.
[(Kit) Neel, Christopher; Thadhani, Naresh] Georgia Inst Technol, George W Woodruff Sch Mech Engn, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
RP Dattelbaum, DM (reprint author), Los Alamos Natl Lab, Dynam & Energet Mat Div, MS P952, Los Alamos, NM 87545 USA.
EM danadat@lanl.gov
FU DOE/DoD; NSWC; DTRA [HDTRA1-07-0018]
FX The authors acknowledge funding provided by Dr. Richard Ames and the
Office of Naval Research, and continued support from the DOE/DoD Joint
Munitions Program under the "Dynamic Behavior of Polymers" project led
by Brad Clements. We also acknowledge Brian Bartram, Nick Pence, Paul
Chapman, and Frank Archuleta with help with the plate impact experiments
at LANL, polymer project team members for insightful discussions, and
Dr. Hubert Lobo of Datapoint Laboratories. LANL is operated by Los
Alamos National Security (LANS) LLC for the National Nuclear Security
Administration of the U. S. Department of Energy. The work performed at
Georgia Tech was supported, in part, by the NSWC (Dr. Richard Ames) and
DTRA under Grant No. HDTRA1-07-0018.
NR 63
TC 4
Z9 5
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 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD DEC 1
PY 2008
VL 104
IS 11
AR 113525
DI 10.1063/1.2980338
PG 11
WC Physics, Applied
SC Physics
GA 393HI
UT WOS:000262364000051
ER
PT J
AU Kim, T
Alberi, K
Dubon, OD
Aziz, MJ
Narayanamurti, V
AF Kim, Taeseok
Alberi, Kirstin
Dubon, Oscar D.
Aziz, Michael J.
Narayanamurti, Venkatesh
TI Composition dependence of Schottky barrier heights and bandgap energies
of GaNxAs1-x synthesized by ion implantation and pulsed-laser melting
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID ELECTRON-EMISSION MICROSCOPY; ASSEMBLED QUANTUM DOTS; V SEMICONDUCTOR
ALLOYS; GAINNAS ALLOYS; GAP ENERGY; SPECTROSCOPY; SOLIDIFICATION;
INTERFACE; HETEROSTRUCTURES; REDUCTION
AB We present a systematic investigation on the band structure of the GaNxAs1-x alloys synthesized using nitrogen ion implantation followed by pulsed-laser melting and rapid thermal annealing. The evolution of the nitrogen-concentration depth profile is consistent with liquid-phase diffusion, solute trapping at the rapidly moving solidification front, and surface evaporation. The reduction of the Schottky barrier height of the Gamma-like threshold at nitrogen composition up to x=0.016 is studied by ballistic electron emission microscopy (BEEM) and determined quantitatively using the second voltage derivative BEEM spectra to be -191 +/- 63 meV per x=0.01, which is close to the corresponding slope for samples grown by low-temperature molecular beam epitaxy. This slope is also consistent with the bandgap narrowing measured on the same samples by photomodulated reflectance and is consistent with the band anticrossing model for the splitting of the conduction band in the GaNxAs1-x alloys. Lithographically patterned GaNxAs1-x dots are imaged by BEEM. Analysis of BEEM spectra of the locally confined dots indicates an alloying-induced decrease in the Schottky barrier height of four times the thermal energy at room temperature. c 2008 American Institute of Physics. [DOI: 10.1063/1.3041154]
C1 [Kim, Taeseok; Aziz, Michael J.; Narayanamurti, Venkatesh] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA.
[Alberi, Kirstin] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Dubon, Oscar D.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
[Dubon, Oscar D.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Kim, T (reprint author), Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA.
EM kim57@fas.harvard.edu
FU DARPA HUNT [222891-01]; National Science Foundation [NSF-ECCS-0701417];
Center for Nanoscale Systems (CNS); National Science Foundation under
NSF [ECS-0335765]; Office of Science; Office of Basic Energy Sciences,
Division of Materials Sciences and Engineering, of the U.S. Department
of Energy [DE-AC0205CH11231]; NSFIGERT
FX We thank Dr. Jeffrey M. Warrender for valuable discussions and technical
assistance with simulating surface evaporation. We also thank Professor
Russell D. Dupuis and Professor Arthur Gossard for providing epitaxial
substrates. This work was supported by a DARPA HUNT Contract No.
222891-01 subaward from the University of Illinois at Urbana-Champaign,
and by the National Science Foundation under Grant No. NSF-ECCS-0701417.
The support of the Center for Nanoscale Systems (CNS) at Harvard
University is also acknowledged. Harvard-CNS is a member of the National
Nanotechnology Infrastructure Network (NNIN), which is supported by the
National Science Foundation under NSF Award No. ECS-0335765. PR
measurements and rapid thermal processing of samples were supported by
the Director, Office of Science, Office of Basic Energy Sciences,
Division of Materials Sciences and Engineering, of the U. S. Department
of Energy under Contract No. DE-AC0205CH11231. K. A. acknowledges
support from a NSFIGERT fellowship.
NR 24
TC 10
Z9 10
U1 0
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD DEC 1
PY 2008
VL 104
IS 11
AR 113722
DI 10.1063/1.3041154
PG 6
WC Physics, Applied
SC Physics
GA 393HI
UT WOS:000262364000087
ER
PT J
AU Kini, RN
Mascarenhas, A
France, R
Ptak, AJ
AF Kini, R. N.
Mascarenhas, A.
France, R.
Ptak, A. J.
TI Low temperature photoluminescence from dilute bismides
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID MOLECULAR-BEAM EPITAXY; BOUND-EXCITON LINES; TIME-RESOLVED
PHOTOLUMINESCENCE; ISOELECTRONIC TRAP BISMUTH; INDUCED DEFECT LINES;
GALLIUM-PHOSPHIDE; UNDULATION SPECTRA; INDIUM-PHOSPHIDE; DECAY TIMES;
GAAS
AB We report on photoluminescence measurements of GaAs((1-x))Bi(x) thin films containing dilute concentration (x <= 0.045%) of isoelectronic impurity Bi. At a temperature of 4 K, we observed a sharp emission line at similar to 1.510 eV and a series of undulations in an energy range of similar to 20 meV below it. We attribute the sharp line at similar to 1.510 eV to the recombination of excitons bound to a complex formed by unintentionally incorporated acceptor or donor atoms in the samples. Undulations observed below the sharp line at 1.510 eV are assigned to the vibronic levels of the acceptors, generated by the dynamic Jahn-Teller effect due to the coupling between the holes bound to Bi and acceptors. The sharp line at similar to 1.510 eV and the undulation peaks show a redshift with increasing Bi concentration due to the decrease in band gap as a result of the strong perturbation to the GaAs band structure induced by isoelectronic Bi impurities. No spectral evidence for isolated Bi forming a bound state in GaAs was seen and similar to the case of Bi in GaP, no Bi-Bi pair states were observed. c 2008 American Institute of Physics. [DOI: 10.1063/1.3041479]
C1 [Kini, R. N.; Mascarenhas, A.; France, R.; Ptak, A. J.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Kini, RN (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM rajeev_kini@nrel.gov
RI Kini, Rajeev/D-2342-2009
OI Kini, Rajeev/0000-0002-3305-9346
FU the DOE/SC/BES/DMS [DE-AC36-99GO10337]
FX We acknowledge the financial support of the DOE/SC/BES/DMS under
Contract No. DE-AC36-99GO10337. We thank R. Reedy for SIMS analysis of
the samples.
NR 40
TC 7
Z9 7
U1 0
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 DEC 1
PY 2008
VL 104
IS 11
AR 113534
DI 10.1063/1.3041479
PG 5
WC Physics, Applied
SC Physics
GA 393HI
UT WOS:000262364000060
ER
PT J
AU Liu, L
Li, XD
Liu, J
Jiang, S
Li, YC
Shen, GY
Mao, HK
Bi, Y
Xu, J
AF Liu, L.
Li, X. D.
Liu, J.
Jiang, S.
Li, Y. C.
Shen, G. Y.
Mao, H. K.
Bi, Y.
Xu, J.
TI High pressure structural and elastic properties of NiO up to 67 GPa
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID TRANSITION-METAL OXIDES; STRENGTH; COMPRESSION; DIFFRACTION;
TEMPERATURE; DEPENDENCE; DISTORTION; POWDER; PHASE; ARGON
AB Using argon as the pressure medium, the structural and elastic properties of NiO have been investigated up to 67 GPa by the in situ synchrotron x-ray diffraction in a diamond anvil cell. Up to 67 GPa, NiO remains in the rhombohedral distorted rocksalt structure without phase transition. The lattice parameters of a and c, indexed in the hexagonal lattice, were found to decrease monotonically with increasing pressure, while the c/a ratio remains almost constant. The elastic properties of NiO were studied by analyzing the linewidth of various diffraction perks, which indicates that the factor S = (S(11)-S(12)-S(44)/2) is negative although the single-crystal elastic compliances S11 is positive, respectively, in the investigated pressure range. (c) 2008 American Institute of Physics. [DOI: 10.1063/1.3031697]
C1 [Liu, L.; Li, X. D.; Liu, J.; Jiang, S.; Li, Y. C.] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China.
[Shen, G. Y.; Mao, H. K.] Argonne Natl Lab, HPCAT, Argonne, IL 60439 USA.
[Shen, G. Y.; Mao, H. K.] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA.
[Liu, L.; Bi, Y.; Xu, J.] Inst Fluid Phys, Lab Shock Wave & Detonat Phys Res, Mianyang 621900, Peoples R China.
RP Liu, J (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China.
EM liuj@ihep.ac.cn
RI Shen, Guoyin/D-6527-2011
FU Chinese Academy of Sciences [KJCX2-SW-N03, KJCX2-SW-N20]; National
Natural Science Foundation of China [10676034]; Ministry of Science and
Technology of China [2005CB724400]
FX The authors thank H. Z. Liu for assistance in the diffraction
experiment, H. P. Liermann for the help in sample preparation, S. V.
Sinogeikin for assistance in use of ruby system. This work was performed
at HPCAT, APS, Argonne National Laboratory. Preliminary experiments were
conducted at 4W2 High-Pressure Station of BSRF, which is supported by
Chinese Academy of Sciences (Grant Nos. KJCX2-SW-N03 and KJCX2-SW-N20).
Financial support from the National Natural Science Foundation of China
(Grant No. 10676034) the Ministry of Science and Technology of China
(grant No. 2005CB724400)is gratefully acknowledged.
NR 33
TC 5
Z9 5
U1 1
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 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD DEC 1
PY 2008
VL 104
IS 11
AR 113521
DI 10.1063/1.3031697
PG 5
WC Physics, Applied
SC Physics
GA 393HI
UT WOS:000262364000047
ER
PT J
AU Bucholtz, A
Bluth, RT
Kelly, B
Taylor, S
Batson, K
Sarto, AW
Tooman, TP
Mccoy, RF
AF Bucholtz, Anthony
Bluth, Robert T.
Kelly, Ben
Taylor, Scott
Batson, Keir
Sarto, Anthony W.
Tooman, Tim P.
Mccoy, Robert F., Jr.
TI The Stabilized Radiometer Platform ( STRAP)-An Actively Stabilized
Horizontally Level Platform for Improved Aircraft Irradiance
Measurements
SO JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY
LA English
DT Article
ID SOLAR-RADIATION; ABSORPTION; CLOUDS; ATMOSPHERE; FLUXES
AB Measurements of solar and infrared irradiance by instruments rigidly mounted to an aircraft have historically been plagued by the introduction of offsets and fluctuations into the data that are solely due to the pitch and roll movements of the aircraft. The Stabilized Radiometer Platform ( STRAP) was developed to address this problem. Mounted on top of an aircraft and utilizing a self-contained, coupled Inertial Navigation System-GPS, STRAP actively keeps a set of uplooking radiometers horizontally level to within +/- 0.02 degrees for aircraft pitch and roll angles of up to approximately +/- 10 degrees. The system update rate of 100 Hz compensates for most pitch and roll changes experienced in normal flight and in turbulence. STRAP was mounted on a Twin Otter aircraft and its performance evaluated during normal flight and during a series of flight maneuvers designed to test the accuracy, range, and robustness of the platform. The measurements from an identical pair of solar pyranometers-one mounted on STRAP and the other rigidly mounted nearby directly to the aircraft-are compared to illustrate the accuracy and capability of the new platform. Results show that STRAP can keep radiometers level within the specified pitch and roll range, that it is able to recover from flight maneuvers outside of this range, and that it greatly increases the quantity of useful radiometer data from any given flight. Of particular note, STRAP now allows accurate measurements of the downwelling solar irradiance during spiral ascents or descents of the aircraft, greatly expanding the utility of aircraft radiometer measurements.
C1 [Bucholtz, Anthony] USN, Res Lab, Monterey, CA 93943 USA.
[Bluth, Robert T.] USN, Postgrad Sch, Ctr Interdisciplinary Remotely Piloted Aircraft S, Monterey, CA 93943 USA.
[Kelly, Ben; Taylor, Scott; Batson, Keir; Sarto, Anthony W.] L3 Commun Sonoma EO, Santa Rosa, CA USA.
[Tooman, Tim P.; Mccoy, Robert F., Jr.] Sandia Natl Labs, Livermore, CA USA.
RP Bucholtz, A (reprint author), USN, Res Lab, 7 Grace Hopper Ave, Monterey, CA 93943 USA.
EM anthony.bucholtz@nrlmry.navy.mil
FU Office of Naval Research ( ONR) Small Business Innovation Research (
SBIR) grant [PE061153N]
FX The authors gratefully acknowledge the efforts and support of the
pilots, technicians, and staff at the Center for Interdisciplinary
Remotely Piloted Aircraft Studies. In particular we wish to thank Dr.
Haflidi H. Jonsson, chief scientist; Mike Hubbell, pilot; Roy Woods,
pilot/engineer; Reggie Burch, avionics mechanic; and Nava Roy, systems
programmer. The development of STRAP was funded by an Office of Naval
Research ( ONR) Small Business Innovation Research ( SBIR) grant. The
support of ONR Program Element PE061153N is gratefully acknowledged.
NR 28
TC 8
Z9 8
U1 0
U2 4
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0739-0572
J9 J ATMOS OCEAN TECH
JI J. Atmos. Ocean. Technol.
PD DEC
PY 2008
VL 25
IS 12
BP 2161
EP 2175
DI 10.1175/2008JTECHA1085.1
PG 15
WC Engineering, Ocean; Meteorology & Atmospheric Sciences
SC Engineering; Meteorology & Atmospheric Sciences
GA 387ZU
UT WOS:000261990900001
ER
PT J
AU Silverstein, JC
Parsad, NM
Tsirline, V
AF Silverstein, Jonathan C.
Parsad, Nigel M.
Tsirline, Victor
TI Automatic perceptual color map generation for realistic volume
visualization
SO JOURNAL OF BIOMEDICAL INFORMATICS
LA English
DT Article
DE Volume visualization; Perceptual color maps; Surgical planning;
Radiological anatomy; Virtual reality
AB Advances in computed tomography imaging technology and inexpensive high performance computer graphics hardware are making high-resolution, full color (24-bit) Volume visualizations commonplace. However, many of the color Maps used in volume rendering provide questionable value in knowledge representation and are non-perceptual thus biasing data analysis or even obscuring information. These drawbacks, Coupled with our need for realistic anatomical volume rendering for teaching and surgical planning, has motivated us to explore the auto-generation of color maps that combine natural colorization with the perceptual discriminating capacity of grayscale. As evidenced by the examples shown that have been created by the algorithm described, the merging of perceptually accurate and realistically colorized virtual anatomy appears to insightfully interpret and impartially enhance Volume rendered patient data. (c) 2008 Elsevier Inc. All rights reserved.
C1 [Silverstein, Jonathan C.] Univ Chicago, Dept Surg, Chicago, IL 60637 USA.
Univ Chicago, Dept Radiol, Chicago, IL 60637 USA.
Univ Chicago, Computat Inst, Chicago, IL 60637 USA.
Res Inst, Argonne Natl Lab, Chicago, IL 60637 USA.
RP Silverstein, JC (reprint author), Univ Chicago, Dept Surg, Suite 405,5640 S Ellis Ave, Chicago, IL 60637 USA.
EM jcs@uchicago.edu
FU National Institutes of Health/National Library of Medicine
[N01-LM-3-3508]
FX The authors acknowledge Eric Olson and Mike Papka of the Computation
Institute of the University of Chicago and Argonne National Laboratory
for their development and continued support of our volume visualization
software and infrastructure; Fred Dech of the Department of Surgery for
visualization expertise; and Dianna Bardo and Michael Vannier of the
Department of Radiology for support in obtaining anonymous computed
tomography series. This work was supported in part by the National
Institutes of Health/National Library of Medicine, under Contract
N01-LM-3-3508.
NR 16
TC 8
Z9 8
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 1532-0464
EI 1532-0480
J9 J BIOMED INFORM
JI J. Biomed. Inform.
PD DEC
PY 2008
VL 41
IS 6
BP 927
EP 935
DI 10.1016/j.jbi.2008.02.008
PG 9
WC Computer Science, Interdisciplinary Applications; Medical Informatics
SC Computer Science; Medical Informatics
GA 376ZC
UT WOS:000261220500007
PM 18430609
ER
PT J
AU Erhardt, S
Mellone, BG
Betts, CM
Zhang, WG
Karpen, GH
Straight, AF
AF Erhardt, Sylvia
Mellone, Barbara G.
Betts, Craig M.
Zhang, Weiguo
Karpen, Gary H.
Straight, Aaron F.
TI Genome-wide analysis reveals a cell cycle-dependent mechanism
controlling centromere propagation
SO JOURNAL OF CELL BIOLOGY
LA English
DT Article
ID ANAPHASE-PROMOTING COMPLEX; DROSOPHILA S2 CELLS; HISTONE H3 VARIANT;
CENP-A; CHROMOSOME SEGREGATION; FISSION YEAST; CHROMATIN; PROTEIN;
LOCALIZATION; KINETOCHORES
AB Centromeres are the structural and functional foundation for kinetochore formation, spindle attachment, and chromosome segregation. In this study, we isolated factors required for centromere propagation using genome-wide RNA interference screening for defects in centromere protein A (CENP-A; centromere identifier [CID]) localization in Drosophila melanogaster. We identified the proteins CAL1 and CENP-C as essential factors for CID assembly at the centromere. CID, CAL1, and CENP-C coimmunoprecipitate and are mutually dependent for centromere localization and function. We also identified the mitotic cyclin A (CYCA) and the anaphase-promoting complex (APC) inhibitor RCA1/Emil as regulators of centromere propagation. We show that CYCA is centromere localized and that CYCA and RCA1/Emil couple centromere assembly to the cell cycle through regulation of the fizzy-related/CDH1 subunit of the APC. Our findings identify essential components of the epigenetic machinery that ensures proper specification and propagation of the centromere and suggest a mechanism for coordinating centromere inheritance with cell division.
C1 [Betts, Craig M.; Straight, Aaron F.] Stanford Med Sch, Dept Biochem, Stanford, CA 94305 USA.
[Erhardt, Sylvia; Mellone, Barbara G.; Zhang, Weiguo; Karpen, Gary H.] Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Genome Dynam, Berkeley, CA 94720 USA.
[Erhardt, Sylvia; Mellone, Barbara G.; Zhang, Weiguo; Karpen, Gary H.] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
[Erhardt, Sylvia] Univ Heidelberg, Zentrum Mol Biol, D-69120 Heidelberg, Germany.
RP Straight, AF (reprint author), Stanford Med Sch, Dept Biochem, Stanford, CA 94305 USA.
EM astraigh@stanford.edu
OI Mellone, Barbara/0000-0002-2785-5119; Straight,
Aaron/0000-0001-5885-7881
FU National Institutes of Health [R01 GM066272, R01 GM074728]; Wellcome
Trust; Philip Morris USA, Inc.; Philip Morris International; Susan G.
Komen Breast Cancer Foundation; Damon Runyon Cancer Research Foundation
FX This work was supported by National Institutes of Health grants to G.H.
Karpen and A. F. Straight (R01 GM066272 and R01 GM074728, respectively),
grants from the Wellcome Trust to S. Erhardt, grants from Philip Morris
USA, Inc. and Philip Morris International to B. G. Mellone, and grants
from the Susan G. Komen Breast Cancer Foundation to W. Zhang. A. F.
Straight is a Gordon Family Scholar supported by the Damon Runyon Cancer
Research Foundation.
NR 52
TC 96
Z9 97
U1 0
U2 2
PU ROCKEFELLER UNIV PRESS
PI NEW YORK
PA 1114 FIRST AVE, 4TH FL, NEW YORK, NY 10021 USA
SN 0021-9525
J9 J CELL BIOL
JI J. Cell Biol.
PD DEC 1
PY 2008
VL 183
IS 5
BP 805
EP 818
DI 10.1083/jcb.200806038
PG 14
WC Cell Biology
SC Cell Biology
GA 377DN
UT WOS:000261232000008
PM 19047461
ER
PT J
AU Franca, EF
Lins, RD
Freitas, LCG
Straatsma, TP
AF Franca, Eduardo F.
Lins, Roberto D.
Freitas, Luiz C. G.
Straatsma, T. P.
TI Characterization of Chitin and Chitosan Molecular Structure in Aqueous
Solution
SO JOURNAL OF CHEMICAL THEORY AND COMPUTATION
LA English
DT Article
ID BETA-CHITIN; CRYSTAL-STRUCTURE; ALPHA-CHITIN; MEMBRANES; CONFORMATIONS;
IONS; POLYSACCHARIDES; ASSOCIATION; SIMULATIONS; DIFFRACTION
AB Molecular dynamics simulations have been used to characterize the structure of single chitin and chitosan chains in aqueous solutions. Chitin chains, whether isolated or in the form of a beta-chitin nanoparticle, adopt the 2-fold helix with phi and phi values similar to its crystalline state. In solution, the intramolecular hydrogen bond HO3((n))center dot center dot center dot O5((n+1)) responsible for the 2-fold helical motif in these polysaccharides is stabilized by hydrogen bonds with water molecules in a well-defined orientation. On the other hand, chitosan can adopt five distinct helical motifs, and its conformational equilibrium is highly dependent on pH. The hydrogen bond pattern and solvation around the 03 atom of insoluble chitosan (basic pH) are nearly identical to these quantities in chitin. Our findings suggest that the solubility and conformation of these polysaccharides are related to the stability of the intrachain HO3((n))center dot center dot center dot O5((n+1)) hydrogen bond, which is affected by the water exchange around the O3-HO3 hydroxyl group.
C1 [Franca, Eduardo F.; Lins, Roberto D.; Straatsma, T. P.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Franca, Eduardo F.; Freitas, Luiz C. G.] Univ Fed Sao Carlos, Dept Quim, BR-13560 Sao Carlos, SP, Brazil.
RP Lins, RD (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM roberto.lins@pni.gov
RI Lins, Roberto/J-7511-2012; Franca, Eduardo/H-4175-2013
OI Lins, Roberto/0000-0002-3983-8025; Franca, Eduardo/0000-0001-5001-7503
FU CAPES; CNPq; FAPESP; Environmental Molecular Sciences Laboratory through
the Computational Grand Challenge Application [GC20892]; DOE Office of
Advanced Scientific Computing Research; Battelle Memorial Institute
[DE-AC05-76RLO1830]
FX E.F.F. and L.C.G.F. acknowledge CAPES, CNPq, and FAPESP for financial
support. The authors thank Peter Zugenmaier for providing the formalism
for structural characterization of crystalline chitins and Nathan Baker
for help with the APBS program. Gratitude is expressed to Brian Lower
for careful reading of this manuscript and to the Environmental
Molecular Sciences Laboratory through the Computational Grand Challenge
Application GC20892. This work has been partly supported by the DOE
Office of Advanced Scientific Computing Research through the project
"Data Intensive Computing for Complex Biological Systems". Pacific
Northwest National Laboratory is operated for the DOE by Battelle
Memorial Institute under contract DE-AC05-76RLO1830.
NR 61
TC 39
Z9 41
U1 1
U2 50
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1549-9618
J9 J CHEM THEORY COMPUT
JI J. Chem. Theory Comput.
PD DEC
PY 2008
VL 4
IS 12
BP 2141
EP 2149
DI 10.1021/ct8002964
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 382NX
UT WOS:000261613800016
PM 26620485
ER
PT J
AU Bonfils, C
Santer, BD
Pierce, DW
Hidalgo, HG
Bala, G
Das, T
Barnett, TP
Cayan, DR
Doutriaux, C
Wood, AW
Mirin, A
Nozawa, T
AF Bonfils, Celine
Santer, Benjamin D.
Pierce, David W.
Hidalgo, Hugo G.
Bala, Govindasamy
Das, Tapash
Barnett, Tim P.
Cayan, Daniel R.
Doutriaux, Charles
Wood, Andrew W.
Mirin, Art
Nozawa, Toru
TI Detection and Attribution of Temperature Changes in the Mountainous
Western United States
SO JOURNAL OF CLIMATE
LA English
DT Article
ID CLIMATE-CHANGE; NORTH-AMERICA; OCEAN VARIABILITY; TRENDS; MODEL;
SURFACE; SNOWPACK; CALIFORNIA; IMPACTS; CCSM3
AB Large changes in the hydrology of the western United States have been observed since the mid-twentieth century. These include a reduction in the amount of precipitation arriving as snow, a decline in snowpack at low and midelevations, and a shift toward earlier arrival of both snowmelt and the centroid (center of mass) of streamflows. To project future water supply reliability, it is crucial to obtain a better understanding of the underlying cause or causes for these changes. A regional warming is often posited as the cause of these changes without formal testing of different competitive explanations for the warming. In this study, a rigorous detection and attribution analysis is performed to determine the causes of the late winter/early spring changes in hydrologically relevant temperature variables over mountain ranges of the western United States. Natural internal climate variability, as estimated from two long control climate model simulations, is insufficient to explain the rapid increase in daily minimum and maximum temperatures, the sharp decline in frost days, and the rise in degree-days above 0 degrees C (a simple proxy for temperature-driven snowmelt). These observed changes are also inconsistent with the model-predicted responses to variability in solar irradiance and volcanic activity. The observations are consistent with climate simulations that include the combined effects of anthropogenic greenhouse gases and aerosols. It is found that, for each temperature variable considered, an anthropogenic signal is identifiable in observational fields. The results are robust to uncertainties in model-estimated fingerprints and natural variability noise, to the choice of statistical down-scaling method, and to various processing options in the detection and attribution method.
C1 [Bonfils, Celine] Lawrence Livermore Natl Lab, Program Climate Model Diag, Livermore, CA 94550 USA.
[Pierce, David W.; Hidalgo, Hugo G.; Das, Tapash; Barnett, Tim P.; Cayan, Daniel R.] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
[Cayan, Daniel R.] US Geol Survey, La Jolla, CA USA.
[Wood, Andrew W.] Univ Washington, Seattle, WA 98195 USA.
[Nozawa, Toru] Natl Inst Environm Studies, Tsukuba, Ibaraki, Japan.
RP Bonfils, C (reprint author), Lawrence Livermore Natl Lab, Program Climate Model Diag, POB 808,Mail Stop L-103, Livermore, CA 94550 USA.
EM bonfils2@llnl.gov
RI Santer, Benjamin/F-9781-2011; Bonfils, Celine/H-2356-2012; Wood,
Andrew/L-5133-2013;
OI Bonfils, Celine/0000-0002-4674-5708; Wood, Andrew/0000-0002-6231-0085;
Hidalgo, Hugo/0000-0003-4638-0742
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]; Program of Climate Model Diagnoses and
Intercomparison (PCMDI) [DOE-W-7405-ENG-48]; International Detection and
Attribution Group (IDAG); U. S. Department of Energy, Office of
Biological and Environmental Research
FX First, we thank our three anonymous reviewers for their thorough reading
and their very helpful suggestions. This work was performed under the
auspices of the U.S. Department of Energy by Lawrence Livermore National
Laboratory under Contract DE-AC52-07NA27344. The MIROC data were
generously supplied by National Institute for Environmental Studies
Onogawa, Tsukuba, Ibaraki, Japan. The PCM simulation had been made
available by the National Center for Atmospheric Research. Observed
daily maximum and minimum temperature were obtained from the University
of Washington Land Surface Hydrology Research group
(http://www.hydro.washington.edu), and the network stations used to
generate this dataset were kindly provided by Alan Hamlet. Scripps
Institution of Oceanography (SIO) participants, GB and AM, as well as
travel costs were supported by LLNL through LDRD grants. BS was
supported by DOE-W-7405-ENG-48 to the Program of Climate Model Diagnoses
and Intercomparison (PCMDI). Thanks are also due to Department of
Energy, which supported TPB as part of the International Detection and
Attribution Group (IDAG). CB was mainly supported by the Distinguished
Scientist Fellowship awarded to Benjamin Santer in 2005 by the U. S.
Department of Energy, Office of Biological and Environmental Research.
The California Energy Commission provided partial salary support for DP
and HH at SIO.
NR 63
TC 65
Z9 66
U1 4
U2 36
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 DEC 1
PY 2008
VL 21
IS 23
BP 6404
EP 6424
DI 10.1175/2008JCLI2397.1
PG 21
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 384OM
UT WOS:000261754100018
ER
PT J
AU Pierce, DW
Barnett, TP
Hidalgo, HG
Das, T
Bonfils, C
Santer, BD
Bala, G
Dettinger, MD
Cayan, DR
Mirin, A
Wood, AW
Nozawa, T
AF Pierce, David W.
Barnett, Tim P.
Hidalgo, Hugo G.
Das, Tapash
Bonfils, Celine
Santer, Benjamin D.
Bala, Govindasamy
Dettinger, Michael D.
Cayan, Daniel R.
Mirin, Art
Wood, Andrew W.
Nozawa, Toru
TI Attribution of Declining Western US Snowpack to Human Effects
SO JOURNAL OF CLIMATE
LA English
DT Article
ID UNITED-STATES; CLIMATE-CHANGE; NORTH-AMERICA; MOUNTAIN SNOWPACK;
GREENHOUSE-GAS; WORLDS OCEANS; TRENDS; TEMPERATURE; VARIABILITY;
PRECIPITATION
AB Observations show snowpack has declined across much of the western United States over the period 1950-99. This reduction has important social and economic implications, as water retained in the snowpack from winter storms forms an important part of the hydrological cycle and water supply in the region. A formal model-based detection and attribution (D-A) study of these reductions is performed. The detection variable is the ratio of 1 April snow water equivalent (SWE) to water-year-to-date precipitation (P), chosen to reduce the effect of P variability on the results. Estimates of natural internal climate variability are obtained from 1600 years of two control simulations performed with fully coupled ocean-atmosphere climate models. Estimates of the SWE/P response to anthropogenic greenhouse gases, ozone, and some aerosols are taken from multiple-member ensembles of perturbation experiments run with two models. The D-A shows the observations and anthropogenically forced models have greater SWE/P reductions than can be explained by natural internal climate variability alone. Model-estimated effects of changes in solar and volcanic forcing likewise do not explain the SWE/P reductions. The mean model estimate is that about half of the SWE/P reductions observed in the west from 1950 to 1999 are the result of climate changes forced by anthropogenic greenhouse gases, ozone, and aerosols.
C1 [Pierce, David W.] Scripps Inst Oceanog, Div Climate Atmospher Sci & Phys Oceanog, La Jolla, CA 92093 USA.
[Bonfils, Celine; Santer, Benjamin D.; Bala, Govindasamy; Mirin, Art] Lawrence Livermore Natl Lab, Livermore, CA USA.
[Dettinger, Michael D.; Cayan, Daniel R.] US Geol Survey, La Jolla, CA USA.
[Wood, Andrew W.] Univ Washington, Seattle, WA 98195 USA.
[Nozawa, Toru] Natl Inst Environm Studies, Tsukuba, Ibaraki, Japan.
RP Pierce, DW (reprint author), Scripps Inst Oceanog, Div Climate Atmospher Sci & Phys Oceanog, Mail Stop 0224, La Jolla, CA 92093 USA.
EM dpierce@ucsd.edu
RI Santer, Benjamin/F-9781-2011; Bonfils, Celine/H-2356-2012; Wood,
Andrew/L-5133-2013; Bindoff, Nathaniel/C-8050-2011;
OI Bonfils, Celine/0000-0002-4674-5708; Wood, Andrew/0000-0002-6231-0085;
Bindoff, Nathaniel/0000-0001-5662-9519; Hidalgo,
Hugo/0000-0003-4638-0742
NR 52
TC 105
Z9 106
U1 2
U2 25
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0894-8755
J9 J CLIMATE
JI J. Clim.
PD DEC 1
PY 2008
VL 21
IS 23
BP 6425
EP 6444
DI 10.1175/2008JCLI2405.1
PG 20
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 384OM
UT WOS:000261754100019
ER
PT J
AU Jiang, L
Morelius, E
Zhang, JW
Wolcott, M
Holbery, J
AF Jiang, Long
Morelius, Erving
Zhang, Jinwen
Wolcott, Michael
Holbery, James
TI Study of the Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/Cellulose
Nanowhisker Composites Prepared by Solution Casting and Melt Processing
SO JOURNAL OF COMPOSITE MATERIALS
LA English
DT Article
DE cellulose whisker; nanocomposites; natural fiber; biodegradable polymer;
PHB
ID CELLULOSE WHISKERS; CONSTRUCTION MATERIALS; GREEN COMPOSITES;
NANOCOMPOSITES; FIBER; CRYSTALLIZATION; BIOPOLYMERS
AB In this study cellulose nanowhiskers (CNW) were prepared by sulfuric acid hyrolysis from microcrystalline cellulose (MCC). The biopolymer composites of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)/CNW, was fabricated by solution casting using N, N-dimethylformamide (DMF) as the solvent. Homogeneous dispersion of the whiskers was achieved and the composites exhibited improved tensile strength and modulus and increased glass transition temperature. The melt processing (extrusion and injection molding) of PHBV/CNW composites was also attempted. Despite using polyethylene glycol (PEG) as a compatibilizer, CNW agglomerates formed during freeze-drying could not be broken and well dispersed by the extrusion process due to the large surface area and the polar nature of CNW. As a result, the melt processed PHBV/CNW composites exhibited decreased strength and constant glass transition temperature, a typical trend of microparticle filled polymer systems. MCC was also treated by high-speed mechanical homogenizer to reduce its particle size down to nanoscale range. The homogenized MCC (HMCC) was blended with PHBV by melt processing with the same conditions. The obtained composites were found to have similar properties as the melt-processed PHBV/CNW composites due to poor HMCC dispersion. To the best of our knowledge, PHBV/CNW system has not been studied so far. The treatment of MCC with high-speed homogenizer has also not been reported. This study augments the research on CNW nanocomposites.
C1 [Jiang, Long; Morelius, Erving; Zhang, Jinwen; Wolcott, Michael] Washington State Univ, Wood Mat & Engn Lab, Pullman, WA 99164 USA.
[Holbery, James] Pacific NW Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA.
RP Wolcott, M (reprint author), Washington State Univ, Wood Mat & Engn Lab, Pullman, WA 99164 USA.
EM wolcott@wsu.edu
RI Zhang, Jinwen/G-8674-2014; Jiang, Long/D-6172-2017
OI Zhang, Jinwen/0000-0001-8828-114X; Jiang, Long/0000-0002-1781-134X
FU National Science Foundation's REU [DMR0453554]
FX The authors would like to acknowledge the partial financial support of
the National Science Foundation's REU program under grant number
DMR0453554.
NR 27
TC 94
Z9 98
U1 8
U2 65
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 0021-9983
J9 J COMPOS MATER
JI J. Compos Mater.
PD DEC
PY 2008
VL 42
IS 24
BP 2629
EP 2645
DI 10.1177/0021998308096327
PG 17
WC Materials Science, Composites
SC Materials Science
GA 375JQ
UT WOS:000261110400006
ER
PT J
AU McClarren, RG
Lowrie, RB
AF McClarren, Ryan G.
Lowrie, Robert B.
TI The effects of slope limiting on asymptotic-preserving numerical methods
for hyperbolic conservation laws
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE Asymptotic-preserving numerical methods; Discontinuous Galerkin; Slope
limiters; Thermal radiative transfer
ID THERMAL RADIATIVE-TRANSFER; P-N EQUATIONS; TRANSPORT PROBLEMS; DIFFUSIVE
REGIMES; STIFF RELAXATION; OPTICALLY THICK; SCHEMES; TIME
AB Many hyperbolic systems of equations with stiff relaxation terms reduce to a parabolic description when relaxation dominates. An asymptotic-preserving numerical method is a discretization of the hyperbolic system that becomes a valid discretization of the parabolic system in the asymptotic limit. We explore the consequences of applying a slope limiter to the discontinuous Galerkin (DG) method, with linear elements, for hyperbolic systems with stiff relaxation terms. Without a limiter, the DG method gives an accurate discretization of the Chapman-Enskog approximation of the system when the relaxation length scale is not resolved. It is well known that the first-order upwind (or "step") method fails to obtain the proper asymptotic limit. We show that using the minmod slope limiter also fails, but that using double minmod gives the proper asymptotic limit. Despite its effectiveness in the asymptotic limit, the double minmod limiter allows artificial extrema at cell interfaces, referred to as "sawteeth". We present a limiter that eliminates the sawteeth, but maintains the proper asymptotic limit. The systems that we analyze are the hyperbolic heat equation and the P thermal radiation equations. Numerical examples are used to verify our analysis. (C) 2008 Published by Elsevier Inc.
C1 [McClarren, Ryan G.; Lowrie, Robert B.] Los Alamos Natl Lab, Computat Phys Grp CCS 2, Los Alamos, NM 87545 USA.
RP McClarren, RG (reprint author), Los Alamos Natl Lab, Computat Phys Grp CCS 2, POB 1663,MS D413, Los Alamos, NM 87545 USA.
EM ryanmc@lanl.gov
OI Lowrie, Robert/0000-0001-5537-9183
FU Los Alamos National Security; US Department of Energy
[DE-AC52-06NA25396, LA-UR-07-7512]
FX Los Alamos National Laboratory is operated by Los Alamos National
Security, LLC for the US Department of Energy under Contract
DE-AC52-06NA25396, LA-UR-07-7512.
NR 25
TC 12
Z9 12
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 0021-9991
J9 J COMPUT PHYS
JI J. Comput. Phys.
PD DEC 1
PY 2008
VL 227
IS 23
BP 9711
EP 9726
DI 10.1016/j.jcp.2008.07.012
PG 16
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 374DO
UT WOS:000261023000002
ER
PT J
AU Delzanno, GL
Chacon, L
Finn, JM
Chung, Y
Lapenta, G
AF Delzanno, G. L.
Chacon, L.
Finn, J. M.
Chung, Y.
Lapenta, G.
TI An optimal robust equidistribution method for two-dimensional grid
adaptation based on Monge-Kantorovich optimization
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE Adaptive grid generation; Monge-Ampere equation; Monge-Kantorovich
optimization; Grid tangling; Equidistribution; Newton-Krylov; Multigrid
preconditioning; Moving meshes
ID NEWTON-KRYLOV METHOD; PARTIAL-DIFFERENTIAL EQUATIONS; NAVIER-STOKES
EQUATIONS; ADAPTIVE GRIDS; 2 DIMENSIONS; SPATIAL DIMENSIONS; FLOW
CALCULATIONS; HARMONIC MAPS; GENERATION; IMPLICIT
AB A new cell-area equidistribution method for two-dimensional grid adaptation, based on Monge-Kantorovich optimization (or Monge-Kantorovich optimal transport), is presented. The method is based on a rigorous variational principle, in which the L-2 norm of the grid displacement is minimized, constrained locally to produce a prescribed positive-definite cell volume distribution. The procedure involves solving the Monge-Ampere equation: A single, nonlinear, elliptic scalar equation with no free parameters, and with proved existence and uniqueness theorems. We show that, for sufficiently small grid displacement, this method also minimizes the mean grid-cell distortion, measured by the trace of the metric tensor. We solve the Monge-Ampere equation numerically with a Jacobian-Free Newton-Krylov method. The ellipticity property of the Monge-Ampere equation allows multigrid preconditioning techniques to be used effectively, delivering a scalable algorithm under grid refinement. Several challenging test cases demonstrate that this method produces optimal grids in which the constraint is satisfied numerically to truncation error. We also compare this method to the well known deformation method [G. Liao, D. Anderson, Appl. Anal. 44 (1992) 285]. We show that the new method achieves the desired equidistributed grid using comparable computational time, but with considerably better grid quality than the deformation method. (C) 2008 Elsevier Inc. All rights reserved,
C1 [Delzanno, G. L.; Chacon, L.; Finn, J. M.; Lapenta, G.] Los Alamos Natl Lab, T Plasma Theory Grp 15, Los Alamos, NM 87545 USA.
[Chung, Y.] So Methodist Univ, Dept Math, Dallas, TX 75275 USA.
RP Delzanno, GL (reprint author), Los Alamos Natl Lab, T Plasma Theory Grp 15, Los Alamos, NM 87545 USA.
EM delzanno@lanl.gov; chacon@lanl.gov; finn@lanl.gov; ychung@smu.edu;
lapenta@lanl.gov
OI Chacon, Luis/0000-0002-4566-8763; Lapenta, Giovanni/0000-0002-3123-4024
FU Laboratory Directed Research and Development program (LDRD); US
Department of Energy Office of Science; Office of Fusion Energy
Sciences; Los Alamos National Laboratory
FX The authors are very grateful to Jerry Brackbill, Darryl Holm, Alex
Dragt, Brent Wohlberg, and Richard Chartrand for stimulating
discussions. GLD wishes to thank Caterina Baravalle for constant
support. This work was funded by the Laboratory Directed Research and
Development program (LDRD), US Department of Energy Office of Science,
Office of Fusion Energy Sciences, under the auspices of the National
Nuclear Security Administration of the US Department of Energy by Los
Alamos National Laboratory, operated by Los Alamos National Security LLC
under Contract DE-AC52-06NA25396.
NR 61
TC 44
Z9 45
U1 0
U2 7
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 DEC 1
PY 2008
VL 227
IS 23
BP 9841
EP 9864
DI 10.1016/j.jcp.2008.07.020
PG 24
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 374DO
UT WOS:000261023000010
ER
PT J
AU Feldberg, SW
AF Feldberg, Stephen W.
TI Effect of uncompensated resistance on the cyclic voltammetric response
of an electrochemically reversible surface-attached redox couple:
Uniform current and potential across the electrode surface
SO JOURNAL OF ELECTROANALYTICAL CHEMISTRY
LA English
DT Article
DE Resistance; Uncompensated; Butler-Volmer; Marcus-Hush; Cyclic
voltammetry; Peak potential; Peak current; Simulation
ID ATTAINING EXPONENTIAL CONVERGENCE; FINITE-DIFFERENCE EQUATIONS; FLUX
ERROR; DIGITAL SIMULATIONS; CHEMICAL-REACTIONS; FREE-ENERGY; PART 3;
2ND-ORDER; SYSTEMS; ALGORITHM
AB The effect of uncompensated resistance, R(u), on the cyclic voltammetric response of an electrochemically reversible surface-attached redox couple is quantified using simulation. When current density and interfacial potential are uniform across the electrode surface, the shift in the peak potential, E(peak) - E(0)', the peak current, i(peak), and uncompensated resistance, R(u), can be correlated by a simple, general, empirical expression:
[GRAPHICS]
When the value of (nF/RT)|E(peak) - E(0') | double right arrow 0. (E(peak) - E(0)')/i(peak)R(u) double right arrow 2; when the value of (nF/RT)|E(peak)-E(0)'| double right arrow infinity the value of (E(peak) - E(0)')/i(peak)R(u) double right arrow 1.0; these limiting values are independent of the double layer capacitance, C(dl). For intermediate values this expression is adequately accurate as long as RTC(dl)/n(2)F(2)Gamma (total) <= 0.1. (C) 2008 Elsevier B.V. All rights reserved.
C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RP Feldberg, SW (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
EM feldberg@bnl.gov
NR 20
TC 9
Z9 9
U1 0
U2 7
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 1572-6657
J9 J ELECTROANAL CHEM
JI J. Electroanal. Chem.
PD DEC 1
PY 2008
VL 624
IS 1-2
BP 45
EP 51
DI 10.1016/j.jelechem.2008.07.020
PG 7
WC Chemistry, Analytical; Electrochemistry
SC Chemistry; Electrochemistry
GA 389KF
UT WOS:000262090600008
ER
PT J
AU Steen, WA
Stork, CL
AF Steen, William A.
Stork, Christopher L.
TI Using multivariate analyses to compare subsets of electrodes and
potentials within an electrode array for predicting sugar concentrations
in mixed solutions
SO JOURNAL OF ELECTROANALYTICAL CHEMISTRY
LA English
DT Article
DE Chemometrics; Electrochemical sensing; Glucose; Electrode array;
Multivariate analysis
ID PARTIAL LEAST-SQUARES; ELECTROCATALYTIC OXIDATION; CALIBRATION METHODS;
CYCLIC VOLTAMMETRY; NEURAL-NETWORKS; FEED SAMPLES; D-GLUCOSE;
REGRESSION; RESOLUTION; MIXTURES
AB A non-selective electrode array is presented for the quantification of fructose, galactose, and glucose in mixed solutions. A unique feature of this electrode array relative to other published work is the wide diversity of electrode materials incorporated within the array, being constructed of 41 different metals and metal alloys. Cyclic voltammograms were acquired for solutions containing a single sugar at varying concentrations, and the correlation between current and sugar concentration was calculated as a function of potential and electrode array element. The correlation plots identified potential regions and electrodes that scaled most linearly with sugar concentration, and the number of electrodes used in building predictive models was reduced to 15. Partial least squares regression models relating electrochemical response to sugar concentration were constructed using data from single electrodes and multiple electrodes within the array, and the predictive abilities of these models were rigorously compared using a non-parametric Wilcoxon test. Models using single electrodes (Pt:Rh (90: 10) for fructose, Au:Ni (82:18) for galactose, and Au for glucose) were judged to be statistically superior or indistinguishable from those built with multiple electrodes. Additionally, for each sugar, interval partial least squares regression successfully identified a subset of potentials within a given electrode that generated a model of statistically equivalent predictive ability relative to the full potential model. While including data from multiple electrodes offered no benefit in predicting sugar concentration, use of the array afforded the versatility and flexibility of selecting the best single electrode for each sugar. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Steen, William A.; Stork, Christopher L.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Stork, CL (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM wasteen@sandia.gov; clstork@sandia.gov
FU United States Department of Energy's National Nuclear Security
Administration; [DE-AC04-94AL85000]
FX 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. The authors thank Carly S. George for performing many
of the experiments and Edward V. Thomas for providing the experimental
designs. Christopher A. Apblett and Edward V. Thomas are acknowledged
for providing valuable comments on the manuscript.
NR 22
TC 2
Z9 2
U1 0
U2 6
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 1572-6657
J9 J ELECTROANAL CHEM
JI J. Electroanal. Chem.
PD DEC 1
PY 2008
VL 624
IS 1-2
BP 186
EP 196
DI 10.1016/j.jelechem.2008.09.018
PG 11
WC Chemistry, Analytical; Electrochemistry
SC Chemistry; Electrochemistry
GA 389KF
UT WOS:000262090600029
ER
PT J
AU Lang, SB
Tuncer, E
AF Lang, Sidney B.
Tuncer, Enis
TI Comparison of techniques for solving the Laser Intensity Modulation
Method (LIMM) equation
SO JOURNAL OF ELECTROCERAMICS
LA English
DT Article; Proceedings Paper
CT 4th Asian Meeting on Electroceramics (AMEC-4)
CY JUN 27-30, 2005
CL Hangzhou, PEOPLES R CHINA
DE LIMM; Regularization; Polarization; Pyroelectricity; Monte Carlo
ID SPACE-CHARGE; DISTRIBUTIONS; POLARIZATION
AB The Laser Intensity Modulation Method (LIMM) is a technique for the determination of polarization and/or space charge profiles in the thickness direction of ceramic and polymeric samples. The experimental data are analyzed by means of a Fredholm integral equation of the first kind. This equation admits to multiple and very different solutions. A number of techniques have been developed in order to obtain the most physically reasonable profile. Several techniques based on the regularization method have been proposed. A recent version, polynomial regularization, was developed by Lang. A completely different approach is the Monte Carlo method of Tuncer and Lang. Several sets of both simulated and experimental data are analyzed by the two methods in this paper. Conclusions concerning speed and accuracy are presented.
C1 [Lang, Sidney B.] Ben Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, Israel.
[Tuncer, Enis] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Lang, SB (reprint author), Ben Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, Israel.
EM lang@bgu.ac.il; tuncere@ornl.gov
RI Lang, Sidney/F-1308-2012;
OI Tuncer, Enis/0000-0002-9324-4324
NR 6
TC 5
Z9 5
U1 1
U2 5
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1385-3449
J9 J ELECTROCERAM
JI J. Electroceram.
PD DEC
PY 2008
VL 21
IS 1-4
BP 827
EP 830
DI 10.1007/s10832-007-9312-2
PG 4
WC Materials Science, Ceramics
SC Materials Science
GA 399XS
UT WOS:000262833200192
ER
PT J
AU Lupini, AR
Pennycook, SJ
AF Lupini, Andrew R.
Pennycook, Stephen J.
TI Rapid autotuning for crystalline specimens from an inline hologram
SO JOURNAL OF ELECTRON MICROSCOPY
LA English
DT Letter
ID TRANSMISSION ELECTRON-MICROSCOPE; STEM INSTRUMENT; SHADOW IMAGES;
RESOLUTION
AB A method to measure the aberration function for a crystalline specimen from a single inline hologram or 'Ronchigram' by dividing it up into small patches is derived. Measurement of aberrations is demonstrated from both dynamical simulations and experimental Ronchigrams. This method should allow rapid fine-tuning on a variety of crystalline specimens and represents a key step toward active optics for scanning transmission electron microscopy.
C1 [Lupini, Andrew R.; Pennycook, Stephen J.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Lupini, AR (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
EM 9az@ornl.gov
NR 25
TC 8
Z9 8
U1 2
U2 4
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0022-0744
J9 J ELECTRON MICROSC
JI J. Electron Microsc.
PD DEC
PY 2008
VL 57
IS 6
BP 195
EP 201
DI 10.1093/jmicro/dfn022
PG 7
WC Microscopy
SC Microscopy
GA 373MW
UT WOS:000260977000004
PM 18988637
ER
PT J
AU Lyons, KD
Honeygan, S
Mroz, T
AF Lyons, K. David
Honeygan, Simone
Mroz, Thomas
TI NETL Extreme Drilling Laboratory Studies High Pressure High Temperature
Drilling Phenomena
SO JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
LA English
DT Article
CT 26th International Conference on Offshore Mechanics and Arctic
Engineering (OMAE 2007)
CY JUN 10-15, 2007
CL San Diego, CA
AB The U.S. Department of Energy's National Energy Technology Laboratory (NETL) established the Extreme Drilling Laboratory to engineer effective and efficient drilling technologies viable at depths greater than 20,000 ft. This paper details the challenges of ultradeep drilling, documents reports of decreased drilling rates as a result of increasing fluid pressure and temperature, and describes NETL Is research and development activities. NETL is invested in laboratory-scale physical simulation. Its physical simulator will have capability of circulating drilling fluids at 30,000 psi and 480 degrees F around a single drill cutter This simulator is not yet operational; therefore, the results will be limited to the identification of leading hypotheses of drilling phenomena and NETL's test plans to validate or refute such theories. Of particular interest to the Extreme Drilling Laboratory's studies are the combinatorial effects drilling fluid pressure, drilling fluid properties, rock properties, pore pressure, and drilling parameters, such as cutter rotational speed, weight on bit, and hydraulics associated with drilling fluid introduction to the rock-cutter interface. A detailed discussion of how each variable is controlled in a laboratory setting will be part of the conference paper and presentation. [DOI: 10.1115/1.3000139]
C1 [Lyons, K. David; Honeygan, Simone; Mroz, Thomas] US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA.
RP Lyons, KD (reprint author), US DOE, Natl Energy Technol Lab, 3610 Collins Ferry Rd,POB 880, Morgantown, WV 26507 USA.
NR 7
TC 2
Z9 2
U1 1
U2 5
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0195-0738
J9 J ENERG RESOUR-ASME
JI J. Energy Resour. Technol.-Trans. ASME
PD DEC
PY 2008
VL 130
IS 4
AR 043102
DI 10.1115/1.3000139
PG 4
WC Energy & Fuels
SC Energy & Fuels
GA 399XU
UT WOS:000262833400010
ER
PT J
AU Raymond, DW
Elsayed, MA
Polsky, Y
Kuszmaul, SS
AF Raymond, David W.
Elsayed, M. A.
Polsky, Yarom
Kuszmaul, Scott S.
TI Laboratory Simulation of Drill Bit Dynamics Using a Model-Based
Servohydraulic Controller
SO JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
LA English
DT Article
CT 26th International Conference on Offshore Mechanics and Arctic
Engineering (OMAE 2007)
CY JUN 10-15, 2007
CL San Diego, CA
ID DRILLSTRINGS; VIBRATIONS
AB Drilling costs are significantly influenced by bit performance when drilling in offshore formations. Retrieving and replacing damaged downhole tools is air extraordinarily expensive and time-intensive process, easily costing several hundred thousand dollars of offshore rig time plus the cost of damaged components. Dynamic behavior of the drill string can be particularly problematic when drilling high strength rock, where the risk of bit failure increases dramatically. Many of these dysfunctions arise due to the interaction between the forces developed at the bit-rock interface and the modes of vibration of the drill string. Although existing testing facilities tire adequate for characterizing bit performance in various formations and operating conditions, they lack the necessary drill string attributes to characterize the interaction between the bit and the bottom hole assembly (BHA). A facility that includes drill string compliance and yet allows real-rock/bit interaction would provide an advanced practical understanding of the influence of drill string dynamics on bit life and performance. Such a facility can be used to develop new bit designs and cutter materials, qualify downhole component reliability, and thus mitigate the harmful effects of vibration. It can also serve as a platform for investigating process-related parameters, which influence drilling performance and bit-induced vibration to develop improved practices for drilling operators. The development of an advanced laboratory simulation capability is being pursued to allow the dynamic properties of a BHA to be reproduced in the laboratory. This simulated BHA is used to support an actual drill bit while conducting drilling tests in representative rocks in the laboratory The advanced system can be used to model the response of more complex representations of a drill string with multiple modes of vibration. Application of the system to field drilling data is also addressed. [DOI: 10.1115/1.3000142]
C1 [Raymond, David W.; Polsky, Yarom; Kuszmaul, Scott S.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Elsayed, M. A.] Univ Louisiana Lafayette, Lafayette, LA 70504 USA.
RP Raymond, DW (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
RI Polsky, Yarom/F-2764-2013
NR 17
TC 1
Z9 1
U1 0
U2 4
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0195-0738
J9 J ENERG RESOUR-ASME
JI J. Energy Resour. Technol.-Trans. ASME
PD DEC
PY 2008
VL 130
IS 4
AR 043103
DI 10.1115/1.3000142
PG 12
WC Energy & Fuels
SC Energy & Fuels
GA 399XU
UT WOS:000262833400011
ER
PT J
AU Hage, J
Jordan, G
Mote, J
Whitestone, Y
AF Hage, Jerald
Jordan, Gretchen
Mote, Jonathon
Whitestone, Yuko
TI Designing and facilitating collaboration in R&D: A case study
SO JOURNAL OF ENGINEERING AND TECHNOLOGY MANAGEMENT
LA English
DT Article
DE R&D management; Innovation; Complexity; Co-location; Cross-functional
teams
ID PERCEIVED ORGANIZATIONAL SUPPORT; PRODUCT DEVELOPMENT; DEVELOPMENT
LABORATORIES; SOCIAL SUPPORT; INTEGRATION; PERSPECTIVE; LEADERSHIP;
INNOVATION; PROJECTS; STRESS
AB This case study aims to highlight the strategic decisions and managerial practices in the formation and operation of a co-located research unit within a national laboratory. The empirical evidence is based on interviews with members of the research unit as well as responses from a research environment survey. The findings of the case study suggest specific strategies that are conducive not only for the co-location of research units but also for research management in general. Principal among these are the need to balance increases in diversity and complexity with mechanisms of integration and the use of specific management practices and leadership qualities that support these activities. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Mote, Jonathon] Univ Maryland, Dept Sociol, College Pk, MD 20742 USA.
[Jordan, Gretchen] Sandia Natl Labs, Livermore, CA 94550 USA.
RP Mote, J (reprint author), Univ Maryland, Dept Sociol, College Pk, MD 20742 USA.
EM jmote@socy.umd.edu
OI Mote, Jonathon/0000-0003-0203-3992
NR 38
TC 6
Z9 6
U1 1
U2 17
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0923-4748
J9 J ENG TECHNOL MANAGE
JI J. Eng. Technol. Manage.
PD DEC
PY 2008
VL 25
IS 4
BP 256
EP 268
DI 10.1016/j.jengtecman.2008.10.005
PG 13
WC Business; Engineering, Industrial; Management
SC Business & Economics; Engineering
GA 392HX
UT WOS:000262294900002
ER
PT J
AU Nurick, WH
Ohanian, T
Talley, DG
Strakey, PA
AF Nurick, W. H.
Ohanian, T.
Talley, D. G.
Strakey, P. A.
TI The Impact of Manifold-to-Orifice Turning Angle on Sharp-Edge Orifice
Flow Characteristics in Both Cavitation and Noncavitation Turbulent Flow
Regimes
SO JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME
LA English
DT Article
AB The approach taken was to analyze the results in a manner consistent with application by design engineers to new and existing applications, while providing some insight into the processes that are occurring. This paper deals with predicting the initiation of cavitation, cavitation impacts on the contraction coefficient (C(c)), as well as noncavitation impacts on discharge coefficient (C(d)) from L/D of five sharp-edge orifices over a turning angle range between 60 deg and 120 deg. The results show that in the cavitation regime, C(c) is controlled by the cavitation parameter (K(cav)), where the data follow the 1/2 power with K(cav), and inception of cavitation occurs at a K(cav) of 1.8. In the noncavitation regime for conditions where the cross velocity is 0 the data are consistent with the first order equation relating head loss (H(L)) to the dynamic pressure where K(L) is constant and is consistent with in-line orifices. Cross flow has a significant impact on loss coefficient and depends on both the turning angle and manifold inlet to orifice exit velocity ratio. [DOI: 10.1115/1.2978999]
C1 [Nurick, W. H.; Ohanian, T.] Sci & Technol Applicat LLC STA, Moorpark, CA 93021 USA.
[Talley, D. G.] Air Force Res Lab Edwards AFB, AFRL PRSA, Edwards AFB, CA 93524 USA.
[Strakey, P. A.] Natl Energy Technol Lab, Energy Syst Dynam Div, Morgantown, WV 26505 USA.
RP Nurick, WH (reprint author), Sci & Technol Applicat LLC STA, Moorpark, CA 93021 USA.
EM wnurick@verizon.net
NR 11
TC 3
Z9 3
U1 2
U2 2
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0098-2202
J9 J FLUID ENG-T ASME
JI J. Fluids Eng.-Trans. ASME
PD DEC
PY 2008
VL 130
IS 12
AR 121102
DI 10.1115/1.2978999
PG 10
WC Engineering, Mechanical
SC Engineering
GA 366JY
UT WOS:000260478300002
ER
PT J
AU Baker-Austin, C
McArthur, JV
Tuckfield, RC
Najarro, M
Lindell, AH
Gooch, J
Stepanauskas, R
AF Baker-Austin, Craig
McArthur, J. V.
Tuckfield, R. Cary
Najarro, Michael
Lindell, Angela H.
Gooch, Jan
Stepanauskas, Ramunas
TI Antibiotic Resistance in the Shellfish Pathogen Vibrio parahaemolyticus
Isolated from the Coastal Water and Sediment of Georgia and South
Carolina, USA
SO JOURNAL OF FOOD PROTECTION
LA English
DT Article
ID THERMOSTABLE DIRECT HEMOLYSIN; UNITED-STATES; OYSTERS; SUSCEPTIBILITY;
ENVIRONMENT; VULNIFICUS; TDH; ENUMERATION; WASHINGTON; SEAFOOD
AB Vibrio parahaemolyticus is a grain-negative pathogen commonly encountered in estuarine and marine environments-and a common cause of seafood-related gastrointestinal infections. We isolated 350 V. parahaemolyticus strains from water and sediment at three locations along the Atlantic coast of Georgia and South Carolina during various seasons. These isolates were tested for Susceptibility to 24 antibiotics. Isolate Virulence was determined through PCR of tdh and trh genes. The breadth of resistance to antibiotics was unexpectedly high, with 24% isolates demonstrating resistance to 10 or more agents. A significant fraction of isolates were resistant to diverse beta-lactams, aminoglycosides, and other classes of antibiotics. Fifteen of the 350 strains possessed virulence genes, with no apparent correlation between virulence and site, sample type, or season of isolation. Antibiotic resistance was slightly reduced among the virulent strains. This study represents one of the largest Surveys to date of the virulence and antibiotic resistance in environmental V parahaemolyticus strains. The observed antibiotic susceptibility patterns suggest that Current guidelines for the antibiotic treatment of non-cholerae Vibrio should be reevaluated and extended.
C1 [Baker-Austin, Craig; McArthur, J. V.; Lindell, Angela H.] Savannah River Ecol Lab, Aiken, SC 29802 USA.
[Tuckfield, R. Cary] Savannah River Natl Lab, Aiken, SC 29808 USA.
[Najarro, Michael] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA.
[Gooch, Jan] Natl Oceanog & Atmospher Adm, Charleston, SC 29405 USA.
[Stepanauskas, Ramunas] Bigelow Lab Ocean Sci, Boothbay Harbor, ME 04575 USA.
RP Baker-Austin, C (reprint author), Ctr Environm Fisheries & Aquaculture Sci, Weymouth Lab, Weymouth DT4 8UB, Dorset, England.
EM craig.baker-austin@cefas.co.uk
OI Stepanauskas, Ramunas/0000-0003-4458-3108
FU National Oceanographic and Atmospheric Administration [NA04OAR4600198];
U.S. Department of Energy [DE-FC09-96SR18546]; National Science
Foundation [DBI-0453493]; U.S. Government
FX We thank Blaine West, Charles Zemp, Kirk Kessler. Richard Gregory. and
Marc Frischer for help in sample collection. Brian Thompson and Brian
Robinson are acknowledged for their assistance in isolate preparation.
This work was supported by the National Oceanographic and Atmospheric
Administration Award NA04OAR4600198 to R. Stepanauskas and by additional
support provided from the U.S. Department of Energy through Financial
Assistance Award DE-FC09-96SR18546 to the University of Georgia Research
Foundation. NI. Najarro was Supported by National Science Foundation
grant DBI-0453493. This report was prepared as an account of work
sponsored by an agency of the U.S. Government. Neither the U.S.
Government nor any agency thereof, nor any of their employees, makes any
warranty expressed or implied, or assumes any legal liability OF
responsibility for the accuracy, completeness. Of 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. OF service by trade name,
trademark. Manufacturer. or otherwise does not necessarily constitute or
imply its endorsement, recommendation. or favoring, by the U.S.
Government or any agency thereof, The views and opinions of authors
expressed herein do not necessarily state or reflect those of the U.S.
Government of, any agency thereof.
NR 33
TC 28
Z9 31
U1 0
U2 18
PU INT ASSOC FOOD PROTECTION
PI DES MOINES
PA 6200 AURORA AVE SUITE 200W, DES MOINES, IA 50322-2863 USA
SN 0362-028X
J9 J FOOD PROTECT
JI J. Food Prot.
PD DEC
PY 2008
VL 71
IS 12
BP 2552
EP 2558
PG 7
WC Biotechnology & Applied Microbiology; Food Science & Technology
SC Biotechnology & Applied Microbiology; Food Science & Technology
GA 380NR
UT WOS:000261472900028
PM 19244914
ER
PT J
AU Siemon, RE
Bauer, BS
Awe, TJ
Angelova, MA
Fuelling, S
Goodrich, T
Lindemuth, IR
Makhin, V
Atchison, WL
Faehl, RJ
Reinovsky, RE
Turchi, PJ
Degnan, JH
Ruden, EL
Frese, MH
Garanin, SF
Mokhov, VN
AF Siemon, R. E.
Bauer, B. S.
Awe, T. J.
Angelova, M. A.
Fuelling, S.
Goodrich, T.
Lindemuth, I. R.
Makhin, V.
Atchison, W. L.
Faehl, R. J.
Reinovsky, R. E.
Turchi, P. J.
Degnan, J. H.
Ruden, E. L.
Frese, M. H.
Garanin, S. F.
Mokhov, V. N.
TI The challenge of wall-plasma interaction with pulsed megagauss magnetic
fields
SO JOURNAL OF FUSION ENERGY
LA English
DT Article
DE magneto-inertial fusion; high energy density physics; exploding wires;
megagauss fields; brightness temperature; z-pinch; flute instability
ID Z-PINCH; COMPRESSION
AB A method is described for choosing experimental parameters in studies of high-energy-density (HED) physics relevant to fusion energy, as well as other applications. An important HED issue for magneto-inertial fusion (MIF) is the interaction of metal pusher materials with megagauss (MG) magnetic fields during liner compression of magnetic flux and fusion fuel. The experimental approach described here is to study a stationary conductor when a pulsed current generates MG fields at the surface, instead of studying the inner surface of a moving liner. This places less demand upon the pulsed power system, and significantly improves diagnostic access. Thus the deceptively simple geometry chosen for this work is that of a z pinch composed of a metal cylinder carrying large current. Consideration of well known stability issues for the z pinch shows that for given peak current and rise time from a particular power supply, there is a minimum radius and thus maximum B field that can be created without disruption of the conductor before peak current. The reasons are reviewed why MG levels of magnetic field, as required for MIF, result in high temperatures and plasma formation at the surface of the metal in response to Ohmic heating. The distinction is noted between the liner regime obtained with cylindrical rods, which have a skin depth small compared to the conductor radius, and the exploding thin-wire regime, which has skin depth larger than the wire radius. A means of diagnostic development is described using a small facility (DPM15) built at the University of Nevada, Reno. It is argued that surface plasma temperature measurements in the 10-eV range are feasible based on the intensity of visible light emission.
C1 [Siemon, R. E.; Bauer, B. S.; Awe, T. J.; Angelova, M. A.; Fuelling, S.; Goodrich, T.; Lindemuth, I. R.; Makhin, V.] Univ Nevada, Reno, NV 89557 USA.
[Atchison, W. L.; Faehl, R. J.; Reinovsky, R. E.; Turchi, P. J.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Degnan, J. H.; Ruden, E. L.] USAF, Res Lab, Albuquerque, NM USA.
[Frese, M. H.] NumerEx, Albuquerque, NM USA.
[Garanin, S. F.; Mokhov, V. N.] VNIIEF, Sarov, Russia.
RP Siemon, RE (reprint author), Univ Nevada, Reno, NV 89557 USA.
EM siemon@unr.edu
FU DOE OFES [DE-FG02-04ER54752, DE-FG02-06ER54892]; Los Alamos National
Laboratory
FX This work was supported by DOE OFES grants DE-FG02-04ER54752, and
DE-FG02-06ER54892. The streak camera was made available by George
Rodriguez and Peter Goodwin at Los Alamos National Laboratory.
NR 10
TC 6
Z9 6
U1 0
U2 4
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0164-0313
J9 J FUSION ENERG
JI J. Fusion Energy
PD DEC
PY 2008
VL 27
IS 4
BP 235
EP 240
DI 10.1007/s10894-008-9144-3
PG 6
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 354WY
UT WOS:000259671800002
ER
PT J
AU Serrano, JR
Kearney, SP
AF Serrano, Justin R.
Kearney, Sean P.
TI Time-Resolved Micro-Raman Thermometry for Microsystems in Motion
SO JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
LA English
DT Article
DE Raman spectroscopy; thermometry; MEMS; thermal actuators
ID TEMPERATURE-MEASUREMENT; SPECTROSCOPY; SILICON; SCATTERING; ACTUATORS
AB Micro-Raman thermometry has been demonstrated to be a feasible technique for obtaining surface temperatures with micron-scale spatial resolution for microelectronic and microelectromechanical systems (MEMSs). However, the intensity of the Raman signal emerging from the probed device is very low and imposes a requirement of prolonged data collection times in order to obtain reliable temperature information. This characteristic currently limits Raman thermometry to steady-state conditions and thereby prevents temperature measurements of transient and fast tune-scale events. In this paper, we discuss the extension of the micro-Raman thermometry diagnostic technique to obtain transient temperature measurements on microelectromechanical devices with 100 As temporal resolution. Through the use of a phase-locked technique we are able to obtain temperature measurements on. electrically powered MEMS actuators powered with a periodic signal. Furthermore, we demonstrate a way of obtaining reliable temperature measurements on micron-scale devices that undergo mechanical movement during the device operation. [DOI: 10.1115/1.2976552]
C1 [Serrano, Justin R.; Kearney, Sean P.] Sandia Natl Labs, Engn Sci Ctr, Albuquerque, NM 87185 USA.
RP Serrano, JR (reprint author), Sandia Natl Labs, Engn Sci Ctr, POB 5800, Albuquerque, NM 87185 USA.
NR 16
TC 4
Z9 4
U1 0
U2 15
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0022-1481
J9 J HEAT TRANS-T ASME
JI J. Heat Transf.-Trans. ASME
PD DEC
PY 2008
VL 130
IS 12
AR 122401
DI 10.1115/1.2976552
PG 5
WC Thermodynamics; Engineering, Mechanical
SC Thermodynamics; Engineering
GA 400BE
UT WOS:000262842200011
ER
PT J
AU Bauer, CW
Tackmann, FJ
Thaler, J
AF Bauer, Christian W.
Tackmann, Frank J.
Thaler, Jesse
TI GenEvA (I): a new framework for event generation
SO JOURNAL OF HIGH ENERGY PHYSICS
LA English
DT Article
DE Jets; Phenomenological Models; NLO Computations; QCD
ID JET CROSS-SECTIONS; HIGHER-ORDER CORRECTIONS; TO-LEADING ORDER;
E+E-ANNIHILATION; PARTON SHOWERS; QCD CASCADES; ALGORITHMS; COLLISIONS;
MODEL
AB We show how many contemporary issues in event generation can be recast in terms of partonic calculations with a matching scale. This framework is called GenEvA, and a key ingredient is a new notion of phase space which avoids the problem of phase space double-counting by construction and includes a built-in definition of a matching scale. This matching scale can be used to smoothly merge any partonic calculation with a parton shower. The best partonic calculation for a given region of phase space can be determined through physics considerations alone, independent of the algorithmic details of the merging. As an explicit example, we construct a positive-weight partonic calculation for e(vertical bar) e(-) -> n jets at next-to-leading order (NLO) with leading-logarithmic (LL) resummation. We improve on the NLO/LL result by adding additional higher-multiplicity tree-level (LO) calculations to obtain a merged NLO/LO/LL result. These results are implemented using a new phase space generator introduced in a companion paper [1].
C1 [Bauer, Christian W.; Tackmann, Frank J.; Thaler, Jesse] Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Bauer, CW (reprint author), Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM cwbauer@lbl.gov; ftackmann@lbl.gov; jthaler@jthaler.net
FU Director, Office of Science, Office of High Energy Physics of the U. S.
Department of Energy [DE-AC02-05CH11231]; DOE OJI; LDRD; LBNL; Miller
Institute for Basic Research in Science
FX We would like to thank Johan Alwall, Lance Dixon, Walter Giele, Beate
Heinemann, Zoltan Ligeti, Michelangelo Mangano, Michael Peskin, Matthew
Schwartz, Torbjorn Sjostrand, Peter Skands, Iain Stewart, and Dieter
Zeppenfeld for many useful discussions. We would also like to thank
Johan Alwall, Fabio Maltoni, and Tim Stelzer for patient assistance with
MadGraph, and Jeffrey Anderson for help with general computing
questions. This work was supported in part by the Director, Office of
Science, Office of High Energy Physics of the U. S. Department of Energy
under the Contract DE-AC02-05CH11231. CWB acknowledges support from an
DOE OJI award and an LDRD grant from LBNL. JT is supported by a
fellowship from the Miller Institute for Basic Research in Science.
NR 89
TC 14
Z9 14
U1 0
U2 1
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 DEC
PY 2008
IS 12
AR 010
PG 64
WC Physics, Particles & Fields
SC Physics
GA 438TM
UT WOS:000265578300010
ER
PT J
AU Bauer, CW
Tackmann, FJ
Thaler, J
AF Bauer, Christian W.
Tackmann, Frank J.
Thaler, Jesse
TI GenEvA (II): a phase space generator from a reweighted parton shower
SO JOURNAL OF HIGH ENERGY PHYSICS
LA English
DT Article
DE Jets; Phenomenological Models; QCD
ID MULTIDIMENSIONAL INTEGRATION; HELICITY AMPLITUDES; EVENT GENERATION;
MATRIX-ELEMENTS; QCD CASCADES; SCATTERING; ALGORITHM; SIMULATION;
COLLISIONS; COHERENT
AB We introduce a new efficient algorithm for phase space generation. A parton shower is used to distribute events across all of multiplicity, flavor, and phase space, and these events can then be reweighted to any desired analytic distribution. To verify this method, we reproduce the e(+) e(-) -> n jets tree-level result of traditional matrix element tools. We also show how to improve tree-level matrix elements automatically with leadinglogarithmic resummation. This algorithm is particularly useful in the context of a new framework for event generation called GenEvA. In a companion paper [1], we show how the GenEvA framework can address contemporary issues in event generation.
C1 [Bauer, Christian W.; Tackmann, Frank J.; Thaler, Jesse] Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Bauer, CW (reprint author), Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM cwbauer@lbl.gov; ftackmann@lbl.gov; jthaler@jthaler.net
FU Director, Office of Science, Office of High Energy Physics of the U. S.
Department of Energy [DE-AC02-05CH11231]; LDRD; LBNL; Miller Institute
for Basic Research in Science
FX We would like to thank Johan Alwall, Lance Dixon, Walter Giele, Beate
Heinemann, Zoltan Ligeti, Michelangelo Mangano, Michael Peskin, Matthew
Schwartz, Torbjorn Sjostrand, Peter Skands, Iain Stewart, and Dieter
Zeppenfeld for many useful discussions. We would also like to thank
Johan Alwall, Fabio Maltoni, and Tim Stelzer for patient assistance with
MadGraph, and Jeffrey Anderson for help with general computing
questions. This work was supported in part by the Director, Office of
Science, Office of High Energy Physics of the U. S. Department of Energy
under the Contract DE-AC02-05CH11231. CWB acknowledges support from a
DOE OJI award and an LDRD grant from LBNL. JT is supported by a
fellowship from the Miller Institute for Basic Research in Science.
NR 82
TC 14
Z9 14
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 DEC
PY 2008
IS 12
AR 011
PG 57
WC Physics, Particles & Fields
SC Physics
GA 438TM
UT WOS:000265578300011
ER
PT J
AU Cacciari, M
Rojo, J
Salam, GP
Soyez, G
AF Cacciari, Matteo
Rojo, Juan
Salam, Gavin P.
Soyez, Gregory
TI Quantifying the performance of jet definitions for kinematic
reconstruction at the LHC
SO JOURNAL OF HIGH ENERGY PHYSICS
LA English
DT Article
DE Jets; Hadronic Colliders
ID HADRON-HADRON COLLISIONS; ALGORITHM
AB We present a strategy to quantify the performance of jet definitions in kinematic reconstruction tasks. It is designed to make use exclusively of physical observables, in contrast to previous techniques which often used unphysical Monte Carlo partons as a reference. It is furthermore independent of the detailed shape of the kinematic distributions. We analyse the performance of 5 jet algorithms over a broad range of jet-radii, for sources of quark jets and gluon jets, spanning the energy scales of interest at the LHC, both with and without pileup. The results allow one to identify optimal jet definitions for the various scenarios. They confirm that the use of a small jet radius (R similar or equal to 0.5) for quark-induced jets at moderate energy scales, O(100 GeV), is a good choice. However, for gluon jets and in general for TeV scales, there are significant benefits to be had from using larger radii, up to R greater than or similar to 1. This has implications for the span of jet-definitions that the LHC experiments should provide as defaults for searches and other physics analyses.
C1 [Cacciari, Matteo; Rojo, Juan] Univ Paris 07, Univ Paris 06, LPTHE, CNRS,UMR 7589, Paris, France.
[Soyez, Gregory] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Cacciari, M (reprint author), Univ Paris 07, Univ Paris 06, LPTHE, CNRS,UMR 7589, Paris, France.
EM cacciari@lpthe.jussieu.fr; juan.rojo@mi.infn.it; salam@lpthe.jussieu.fr;
gsoyez@quark.phy.bnl.gov
FU French Agence Nationale de la Recherche [ANR-05-JCJC-0046-01]; U.S.
Department of Energy [DE-AC02-98CH10886]
FX This work has been supported in part by the grant ANR-05-JCJC-0046-01
from the French Agence Nationale de la Recherche and under Contract No.
DE-AC02-98CH10886 with the U.S. Department of Energy, and was started at
2007 Physics at TeV Colliders Les Houches workshop. It is a pleasure to
acknowledge interesting discussions with A. Oehler and K. Rabbertz, we
are grateful to G. Dissertori and G. Zanderighi for comments on the
manuscript, and JR thanks D. d'Enterria for a useful conversation. GPS
wishes to thank Brookhaven National Laboratory and Princeton University
for hospitality while this work was being completed. Finally, GS thanks
the LPTHE for hospitality while this work was still preliminary.
NR 33
TC 22
Z9 22
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 DEC
PY 2008
IS 12
AR 032
PG 23
WC Physics, Particles & Fields
SC Physics
GA 438TM
UT WOS:000265578300032
ER
PT J
AU Freivogel, B
Lippert, M
AF Freivogel, Ben
Lippert, Matthew
TI Evidence for a bound on the lifetime of de Sitter space
SO JOURNAL OF HIGH ENERGY PHYSICS
LA English
DT Article
DE dS vacua in string theory; Flux compactifications
ID F-THEORY; COMPACTIFICATION; GRAVITY; VACUUM; DECAY
AB Recent work has suggested a surprising new upper bound on the lifetime of de Sitter vacua in string theory. The bound is parametrically longer than the Hubble time but parametrically shorter than the recurrence time. We investigate whether the bound is satisfied in a particular class of de Sitter solutions, the KKLT vacua. Despite the freedom to make the supersymmetry breaking scale exponentially small, which naively would lead to extremely stable vacua, we find that the lifetime is always less than about exp(10(22)) Hubble times, in agreement with the proposed bound. This result, however, is contingent on several estimates and assumptions; in particular, we rely on a conjectural upper bound on the Euler number of the Calabi-Yau fourfolds used in KKLT compactifications.
C1 [Freivogel, Ben] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Freivogel, Ben] Univ Calif Berkeley, Ctr Theoret Phys, Berkeley, CA 94720 USA.
[Freivogel, Ben] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Lippert, Matthew] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel.
[Lippert, Matthew] Univ Haifa, Dept Math & Phys, IL-36006 Tivon, Israel.
RP Freivogel, B (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM freivogel@berkeley.edu; matthewslippert@gmail.com
FU Israel Science Foundation [568/05]; Berkeley Center for Theoretical
Physics; DOE [DE-AC0376SF00098]
FX We particularly thank Raphael Bousso for collaboration in the early
stages of this project and Shamit Kachru for discussions and technical
assistance. We have also enjoyed helpful discussions with Chris Beem,
Steve Giddings, Maximilian Kreuzer, Andrei Linde, Liam McAllister, Yu
Nakayama, Stephen Shenker, Eva Silverstein, and Leonard Susskind. This
work was supported by Israel Science Foundation grant 568/05, the
Berkeley Center for Theoretical Physics, and by DOE grant
DE-AC0376SF00098.
NR 41
TC 23
Z9 23
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 DEC
PY 2008
IS 12
AR 096
PG 28
WC Physics, Particles & Fields
SC Physics
GA 438TM
UT WOS:000265578300096
ER
PT J
AU Gleisberg, T
Hoche, S
AF Gleisberg, Tanju
Hoeche, Stefan
TI Comix, a new matrix element generator
SO JOURNAL OF HIGH ENERGY PHYSICS
LA English
DT Article
DE Jets; QCD; Standard Model
ID PHASE-SPACE GENERATOR; MONTE-CARLO; SCATTERING-AMPLITUDES; HELICITY
AMPLITUDES; HADRON-COLLISIONS; TREE; RECURSION; COLLIDERS; GLUONS; LEVEL
AB We present a new tree-level matrix element generator, based on the colour dressed Berends-Giele recursive relations. We discuss two new algorithms for phase space integration, dedicated to be used with large multiplicities and colour sampling.
C1 [Gleisberg, Tanju] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
[Hoeche, Stefan] Univ Durham, Inst Particle Phys Phenomenol, Durham DH1 3LE, England.
RP Gleisberg, T (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
EM tanju@slac.stanford.edu; stefan.hoeche@durham.ac.uk
FU US Department of Energy [DE-AC02-76SF00515]; Marie Curie Research
Training Network [MRTN-CT-2006-035505]; MCnet [MRTN-CT-2006035606]
FX We like to thank Claude Duhr, Frank Krauss and Fabio Maltoni for
fruitful discussions and their comments on the manuscript. Special
thanks for technical support go to Jonathan Ferland, Phil Roffe, Graeme
Stewart and the ScotGrid [ 55] Tier 2 sites Durham and Glasgow. We thank
Steffen Schumann for providing comparison results from Amegic++ and
Michelangelo Mangano for results from Alpgen. TG's research was
supported by the US Department of Energy, contract DE-AC02-76SF00515. SH
thanks the HEPTOOLS Marie Curie Research Training Network ( contract
number MRTN-CT-2006-035505) for an Early Stage Researcher position.
Support from MCnet ( contract number MRTN-CT-2006035606) is
acknowledged.
NR 54
TC 114
Z9 114
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 DEC
PY 2008
IS 12
AR 039
PG 33
WC Physics, Particles & Fields
SC Physics
GA 438TM
UT WOS:000265578300039
ER
PT J
AU Zhang, J
Murch, RR
Ross, MA
Ganguly, AR
Nachabe, M
AF Zhang, Jing
Murch, Renee R.
Ross, Mark A.
Ganguly, Auroop R.
Nachabe, Mahmood
TI Evaluation of Statistical Rainfall Disaggregation Methods Using
Rain-Gauge Information for West-Central Florida
SO JOURNAL OF HYDROLOGIC ENGINEERING
LA English
DT Article
ID ARTIFICIAL NEURAL-NETWORKS; POINT-PROCESS MODEL; STOCHASTIC
DISAGGREGATION; CASCADE MODEL; TIME-SERIES; TEMPORAL DISAGGREGATION;
URBAN HYDROLOGY; SIMULATION; PRECIPITATION; WATER
AB Rainfall disaggregation in time can be useful for the simulation of hydrologic systems and the prediction of floods and flash floods. Disaggregation of rainfall to timescales less than 1 h can be especially useful for small urbanized watershed study, and for continuous hydrologic simulations and when Hortonian or saturation-excess runoff dominates. However, the majority of rain gauges in any region record rainfall in daily time steps or, very often, hourly records have extensive missing data. Also, the convective nature of the rainfall can result in significant differences in the measured rainfall at nearby gauges. This study evaluates several statistical approaches for rainfall disaggregation which may be applicable using data from West-Central Florida, specifically from 1 h observations to 15 min records, and proposes new methodologies that have the potential to outperform existing approaches. Four approaches are examined. The first approach is an existing direct scaling method that utilizes observed 15 min rainfall at secondary rain gauges, to disaggregate observed 1 h rainfall at more numerous primary rain gauges. The second approach is an extension of an existing method for continuous rainfall disaggregation through statistical distributional assumptions. The third approach relies on artificial neural networks for the disaggregation process without sorting and the fourth approach extends the neural network methods through statistical preprocessing via new sorting and desorting schemes. The applicability and performance of these methods were evaluated using information from a fairly dense rain gauge network in West-Central Florida. Of the four methods compared, the sorted neural networks and the direct scaling method predicted peak rainfall magnitudes significantly better than the remaining techniques. The study also suggests that desorting algorithms would also be useful to randomly replace the artificial hyetograph within a rainfall period.
C1 [Zhang, Jing] Capital Normal Univ, Coll Resource Environm & Tourism, Key Lab Resource Environm & GIS Beijing, Beijing 100048, Peoples R China.
[Ross, Mark A.; Nachabe, Mahmood] Univ S Florida, Dept Civil & Environm Engn, Tampa, FL 33620 USA.
[Murch, Renee R.] Water Resource EngineerIntera Inc, Lutz, FL 33548 USA.
[Ganguly, Auroop R.] Oak Ridge Natl Lab, Computat Sci & Engn Div, Oak Ridge, TN 37830 USA.
RP Zhang, J (reprint author), Capital Normal Univ, Coll Resource Environm & Tourism, Key Lab Resource Environm & GIS Beijing, Beijing 100048, Peoples R China.
EM maggie2008zj@yahoo.com
NR 57
TC 5
Z9 5
U1 2
U2 10
PU ASCE-AMER SOC CIVIL ENGINEERS
PI RESTON
PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
SN 1084-0699
J9 J HYDROL ENG
JI J. Hydrol. Eng.
PD DEC
PY 2008
VL 13
IS 12
BP 1158
EP 1169
DI 10.1061/(ASCE)1084-0699(2008)13:12(1158)
PG 12
WC Engineering, Civil; Environmental Sciences; Water Resources
SC Engineering; Environmental Sciences & Ecology; Water Resources
GA 372YI
UT WOS:000260937800006
ER
PT J
AU Williams, GP
Tomasko, D
AF Williams, Gustavious Paul
Tomasko, David
TI Analytical Solution to the Advective-Dispersive Equation with a Decaying
Source and Contaminant
SO JOURNAL OF HYDROLOGIC ENGINEERING
LA English
DT Article
ID TRANSPORT; MODEL
AB We present an analytical solution of the one-dimensional contaminant transport undergoing advection, dispersion, sorption, and first-order decay, subject to a first-order decaying contaminant concentration at the source and a Type I, Dirichlet, boundary at infinity. This solution is unique because of the boundary conditions imposed, but similar to other published solutions. We briefly describe the governing equations, boundary and initial conditions, and the solution techniques used to develop the analytical solution. We provide and discuss the analytic solution using examples with source decay less than, equal to, and greater than contaminant decay during transport. Then we compare the results to several published solutions in the fields of radioactive waste disposal and recalcitrant nonaqueous phase liquid modeling. The other analytical solution results are similar to ours, but the RT3D solution shows more numerical dispersion than our solution.
C1 [Williams, Gustavious Paul] Brigham Young Univ, Dept Civil & Environm Engn, Provo, UT 84602 USA.
[Tomasko, David] Argonne Natl Lab, Environm Assessment Div, Argonne, IL 60439 USA.
RP Williams, GP (reprint author), Brigham Young Univ, Dept Civil & Environm Engn, 368 Clyde Bldg, Provo, UT 84602 USA.
EM gwilliams@et.byu.edu; dtomasko@anl.gov
RI Williams, Gustavious/P-7252-2014
OI Williams, Gustavious/0000-0002-2781-0738
NR 17
TC 5
Z9 6
U1 0
U2 6
PU ASCE-AMER SOC CIVIL ENGINEERS
PI RESTON
PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
SN 1084-0699
J9 J HYDROL ENG
JI J. Hydrol. Eng.
PD DEC
PY 2008
VL 13
IS 12
BP 1193
EP 1196
DI 10.1061/(ASCE)1084-0699(2008)13:12(1193)
PG 4
WC Engineering, Civil; Environmental Sciences; Water Resources
SC Engineering; Environmental Sciences & Ecology; Water Resources
GA 372YI
UT WOS:000260937800010
ER
PT J
AU Huang, MY
Liang, X
Leung, LR
AF Huang, Maoyi
Liang, Xu
Leung, L. Ruby
TI A Generalized Subsurface Flow Parameterization Considering Subgrid
Spatial Variability of Recharge and Topography
SO JOURNAL OF HYDROMETEOROLOGY
LA English
DT Article
ID ARKANSAS RIVER-BASIN; WATER-TABLE DYNAMICS; LAND-SURFACE SCHEME;
SOIL-MOISTURE; TRANSMISSIVITY PROFILE; GROUNDWATER OUTFLOW; MODEL;
TOPMODEL; CATCHMENTS; HILLSLOPE
AB Subsurface flow is an important hydrologic process and a key component of the water budget. Through its direct impacts on soil moisture, it can affect water and energy fluxes at the land surface and influence the regional climate and water cycle. In this study, a new subsurface flow formulation is developed that incorporates the spatial variability of both topography and recharge. It is shown through theoretical derivation and case studies that the power-law and exponential subsurface flow parameterizations and the parameterization proposed by Woods et al. are all special cases of the new formulation. The subsurface flows calculated using the new formulation compare well with values derived from observations at Tulpe-hocken Creek, Pennsylvania, and Walnut Creek, Iowa. Sensitivity studies show that when the spatial variability of topography or recharge, or both is increased, the subsurface flows increase at the two aforementioned sites and at the Maimai hillslope, New Zealand. This is likely due to enhancement of interactions between the groundwater table and the land surface that reduce the flow path. An important conclusion of this study is that the spatial variability of recharge alone, and/or in combination with the spatial variability of topography can substantially alter the behaviors of subsurface flows. This suggests that in macroscale hydrologic models or land surface models, subgrid variations of recharge and topography can make significant contributions to the grid mean subsurface flow and must be accounted for in regions with large surface heterogeneity. This is particularly true for regions with humid climate and a relatively shallow groundwater table where the combined impacts of spatial variability of recharge and topography are shown to be more important. For regions with an arid climate and a relatively deep groundwater table, simpler formulations, for example, the power law, for subsurface flow can work well, and the impacts of subgrid variations of recharge and topography may be ignored.
C1 [Huang, Maoyi] SUNY Buffalo, Dept Civil Struct & Environm Engn, Buffalo, NY 14260 USA.
[Huang, Maoyi] Carnegie Inst Sci, Dept Global Ecol, Stanford, CA USA.
[Huang, Maoyi; Liang, Xu] Univ Pittsburgh, Dept Civil & Environm Engn, Pittsburgh, PA 15261 USA.
[Leung, L. Ruby] Pacific NW Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99352 USA.
RP Huang, MY (reprint author), Univ Pittsburgh, Dept Civil & Environm Engn, Pittsburgh, PA 15261 USA.
EM xuliang@pitt.edu
RI Huang, Maoyi/I-8599-2012
OI Huang, Maoyi/0000-0001-9154-9485
NR 55
TC 11
Z9 11
U1 1
U2 4
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 1525-755X
J9 J HYDROMETEOROL
JI J. Hydrometeorol.
PD DEC
PY 2008
VL 9
IS 6
BP 1151
EP 1171
DI 10.1175/2008JHM936.1
PG 21
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 386DD
UT WOS:000261861600002
ER
PT J
AU Savukov, I
Matlashov, A
Volegov, P
Espy, M
Cooper, M
AF Savukov, I.
Matlashov, A.
Volegov, P.
Espy, M.
Cooper, M.
TI Detection of He-3 spins with ultra-low field nuclear magnetic resonance
employing SQUIDs for application to a neutron electric dipole moment
experiment
SO JOURNAL OF MAGNETIC RESONANCE
LA English
DT Article
DE Helium; SQUID; Ultra-low field; Neutron; Electric dipole moment
ID MICROTESLA FIELDS
AB The precession of He-3 spins is detected with ultra-low field NMR. The absolute strength of the NMR signal is accurately measured and agrees closely with theoretical calculations. The sensitivity is analyzed for applications to a neutron electric dipole moment (nEDM) fundamental symmetry experiment under development. (C) 2008 Published by Elsevier Inc.
C1 [Savukov, I.; Matlashov, A.; Volegov, P.; Espy, M.] Los Alamos Natl Lab, Appl Modern Phys Grp, Los Alamos, NM 87545 USA.
[Cooper, M.] Los Alamos Natl Lab, Subatom Phys Grp, Los Alamos, NM 87545 USA.
RP Savukov, I (reprint author), Los Alamos Natl Lab, Appl Modern Phys Grp, MS D454, Los Alamos, NM 87545 USA.
EM isavukov@lanl.gov
OI Savukov, Igor/0000-0003-4190-5335
NR 11
TC 4
Z9 4
U1 0
U2 1
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1090-7807
J9 J MAGN RESON
JI J. Magn. Reson.
PD DEC
PY 2008
VL 195
IS 2
BP 129
EP 133
DI 10.1016/j.jmr.2008.09.008
PG 5
WC Biochemical Research Methods; Physics, Atomic, Molecular & Chemical;
Spectroscopy
SC Biochemistry & Molecular Biology; Physics; Spectroscopy
GA 374KZ
UT WOS:000261043600002
PM 18835204
ER
PT J
AU Pasilis, SP
Kertesz, V
Van Berkel, GJ
Schulz, M
Schorcht, S
AF Pasilis, Sofie P.
Kertesz, Vilmos
Van Berkel, Gary J.
Schulz, Michael
Schorcht, Susanne
TI HPTLC/DESI-MS imaging of tryptic protein digests separated in two
dimensions
SO JOURNAL OF MASS SPECTROMETRY
LA English
DT Article
DE DESI; peptides; HPTLC; mass spectrometry; imaging
ID DESORPTION ELECTROSPRAY-IONIZATION; THIN-LAYER-CHROMATOGRAPHY; AMBIENT
MASS-SPECTROMETRY; PEPTIDE IDENTIFICATION; DESI; INSTRUMENTATION;
PROTEOMICS; CHEMISTRY; FORENSICS; BIOLOGY
AB Desorption electrospray ionization mass spectrometry (DESI-MS) was demonstrated as a method to detect and identify peptides from two-dimensional separations of cytochrome c and myoglobin tryptic digests on ProteoChrom HPTLC Cellulose sheets. Data-dependent tandem mass spectra were acquired during lane scans across the TLC plates. Peptides and the corresponding proteins were identified using a protein database search software. Two-dimensional distributions of identified peptides were mapped for each separated protein digest. Sequence coverages for cytochrome c and myoglobin were 81 and 74%, respectively. These compared well with those determined using the more standard HPLC/ESI-MS/MS approach (89 and 84%, respectively). Preliminary results show that use of more sensitive instrumentation has the potential for improved detection of peptides with low R(f) values and improvement in sequence coverage. However, less multiple charging and more sodiation were seen in HPTLC/DESI-MS spectra relative to HPLC/ESI-MS spectra, which can affect peptide identification by MS/MS. Methods to increase multiple charging and reduce the extent of sodiation are currently under investigation. Published in 2008 by John Wiley & Sons, Ltd.
C1 [Pasilis, Sofie P.; Kertesz, Vilmos; Van Berkel, Gary J.] Oak Ridge Natl Lab, Organ & Biol Mass Spectrometry Grp, Div Chem Sci, Oak Ridge, TN 37831 USA.
[Schulz, Michael; Schorcht, Susanne] Merck KGaA, Thin Layer Chromatog Lab, Performance & Life Sci Chem, D-64293 Darmstadt, Germany.
RP Van Berkel, GJ (reprint author), Oak Ridge Natl Lab, Organ & Biol Mass Spectrometry Grp, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM vanberkelgj@ornl.gov
RI Kertesz, Vilmos/M-8357-2016
OI Kertesz, Vilmos/0000-0003-0186-5797
FU Cooperative Research and Development Agreement (CRADA) [ORNL02-0662];
ORNL Technology Transfer and Economic Development (TTED); Division of
Chemical Sciences, Geosciences and Biosciences, United States Department
of Energy; Office of Basic Energy Sciences; Battelle Memorial Institute
Technology Maturation Fund; United States Department of Energy
[DE-AC05-00OR22725]
FX S.P.P. acknowledges an Oak Ridge National Laboratory (ORNL) appointment
through the ORNL Postdoctoral Research Associates Program. Dr Julian
Philips(ThermoScientific) is thanked for the loan of the LCQ Deca ion
trap mass spectrometer. Dr Richard King (Merck and Co.) is thanked for
the use of the LTQ mass spectrometer. The MicroIonSpray head used to
fabricate the DESI emitter was provided through a Cooperative Research
and Development Agreement (CRADA) with MDS Sciex (ORNL02-0662). The
surface scanning platform and associated control software used in this
study were developed with support from ORNL Technology Transfer and
Economic Development (TTED) royalty funds. Research into the fundamental
aspects of ion formation was supported by the Division of Chemical
Sciences, Geosciences and Biosciences, United States Department of
Energy, Office of Basic Energy Sciences. Development of surface
sampling/ionization approaches for the analysis of peptides/proteins on
planar separation Media was supported by the Battelle Memorial Institute
Technology Maturation Fund. ORNL is managed and operated by UT-Battelle,
LLC, for the United States Department of Energy under contract
DE-AC05-00OR22725.
NR 30
TC 41
Z9 41
U1 4
U2 34
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 1076-5174
J9 J MASS SPECTROM
JI J. Mass Spectrom.
PD DEC
PY 2008
VL 43
IS 12
BP 1627
EP 1635
DI 10.1002/jms.1431
PG 9
WC Biochemical Research Methods; Chemistry, Analytical; Spectroscopy
SC Biochemistry & Molecular Biology; Chemistry; Spectroscopy
GA 385JZ
UT WOS:000261811800003
PM 18563861
ER
PT J
AU Yusufoglu, Y
Hu, Y
Kanapathipillai, M
Kramer, M
Kalay, YE
Thiyagarajan, P
Akinc, M
Schmidt-Rohr, K
Mallapragada, S
AF Yusufoglu, Yusuf
Hu, Yanyan
Kanapathipillai, Mathumai
Kramer, Matthew
Kalay, Yunus E.
Thiyagarajan, P.
Akinc, Mufit
Schmidt-Rohr, Klaus
Mallapragada, Surya
TI Bioinspired synthesis of self-assembled calcium phosphate nanocomposites
using block copolymer-peptide conjugates
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
ID TRANSFER RADICAL POLYMERIZATION; CRYSTALLINE CARBONATE APATITE;
BIOMIMETIC SYNTHESIS; AQUEOUS-SOLUTIONS; NMR-SPECTROSCOPY;
ROOM-TEMPERATURE; HYDROXYAPATITE; MINERALIZATION; BONE; SCAFFOLDS
AB Thermoreversibly gelling block copolymers conjugated to hydroxyapatite-nucleating peptides were used to template the growth of inorganic calcium phosphate in aqueous solutions. Nuclear magnetic resonance (NMR). Fourier transform infrared (FTIR), transmission electron microscopy, x-ray diffraction, and small-angle scattering were Used to characterize these samples and confirm that the peptides promoted the growth of hydroxyapatite as the inorganic phase. Three different polymer templates were Used with varying charges oil the polymer chains (nonionic. anionic. and zwitterionic), to investigate the role of charge oil mineralization. All of the polymer-inorganic solutions exhibited thermoreversible gelation above room temperature. Nanocomposite formation was confirmed by solid-state NMR, and Several methods identified the Inorganic component as hydroxyapatite. Small angle x-ray scattering and electron microscopy showed thin, elongated crystallites. Thermogravimetric analysis Showed an inorganic content of 30-45 wt% (based oil the mass of the dried,gel at similar to 200 degrees C) in the various samples. Our work offers routes For bioinspired bottom-up approaches for the development of novel, self-assembling, injectable nanocomposite biomaterials for potential orthopedic applications.
C1 [Yusufoglu, Yusuf; Hu, Yanyan; Kanapathipillai, Mathumai; Kramer, Matthew; Kalay, Yunus E.; Akinc, Mufit; Schmidt-Rohr, Klaus; Mallapragada, Surya] Ames Lab, Ames, IA 50011 USA.
[Thiyagarajan, P.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Mallapragada, S (reprint author), Ames Lab, Ames, IA 50011 USA.
EM suryakm@iastate.edu
RI Mallapragada, Surya/F-9375-2012; Hu, Yan-Yan/A-1795-2015
OI Hu, Yan-Yan/0000-0003-0677-5897
FU United States Department of Energy (DOE) Office of Basic Energy Services
[DE-AC02-07CH11358, DE-AC0206CH11357]
FX This work was Supported by the United States Department of Energy (DOE)
Office of Basic Energy Services Under Contract No. DE-AC02-07CH11358.
This work benefited from the use of the APS and the IPNS, funded by the
United States DOE, Office of Science. Office of Basic Energy Science
under Contract No. DE-AC0206CH11357.
NR 51
TC 14
Z9 14
U1 0
U2 17
PU MATERIALS RESEARCH SOC
PI WARRENDALE
PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA
SN 0884-2914
J9 J MATER RES
JI J. Mater. Res.
PD DEC
PY 2008
VL 23
IS 12
BP 3196
EP 3212
DI 10.1557/JMR.2008.0388
PG 17
WC Materials Science, Multidisciplinary
SC Materials Science
GA 379YJ
UT WOS:000261432200009
ER
PT J
AU Thomas, GH
Specht, ED
Larese, JZ
Xue, ZB
Beach, DB
AF Thomas, George H.
Specht, Eliot D.
Larese, John Z.
Xue, Ziling B.
Beach, David B.
TI Growth of epitaxial films of sodium potassium tantalate and niobate on
single-crystal lanthanum aluminate [100] substrates
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
ID NA0.5K0.5NBO3 THIN-FILMS; SOL-GEL ROUTE; OXIDE; DEPOSITION
AB Epitaxial films of sodium potassium tantalate (Na(0.5)K(0.5)TaO(3,) NKT) and sodium potassium niobtate (Na(0.5)K(0.5)NbO(3,) NKN) were grown on single-crystal lanthanum aluminate (LAO) (100) (indexed as a pseudo-cubic unit cell) substrates via an all-alkoxide solution (methoxyethoxide complexes in 2-methoxyethanol) deposition route for the first time. X-ray diffraction studies indicated that the onset of crystallization in powders formed from hydrolyzed gel samples was 550 degrees C. (13)C nuclear magnetic resonance studies of solution of methoxyethoxide complexes indicated that mixed-metal species were formed, consistent with the low crystallization temperatures observed. Thermal gravimetric analysis with simultaneous mass spectrometry showed the facile loss of the ligand (methoxyethoxide) at temperatures below 400 degrees C. Crystalline films were obtained at temperatures as low as 650 degrees C when annealed in air. theta-2 theta x-ray diffraction patterns revealed that the films possessed c-axis alignment in that only (h00) reflections were observed. Pole-figures about the NKT or NKN (220) reflection indicated a single in-plane, cube-on-cube epitaxy. The quality of the films was estimated via omega (out-of-plane) and phi (in-plane) scans and full-widths at half-maximum (FWHMs) were found to be reasonably narrow (similar to 1 degrees), considering the lattice mismatch between the films and the substrate.
C1 [Larese, John Z.; Beach, David B.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
[Thomas, George H.; Larese, John Z.; Xue, Ziling B.] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
[Specht, Eliot D.] Oak Ridge Natl Lab, Div Mat Sci, Oak Ridge, TN 37831 USA.
RP Beach, DB (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM beachdb@ornl.gov
RI Specht, Eliot/A-5654-2009
OI Specht, Eliot/0000-0002-3191-2163
FU United States Department of Energy [DE-AC05-00OR22725]
FX This work was performed with the Support of the Division of Materials
Sciences, Office of Basic Energy Sciences, United States Department of
Energy, Under Contract No. DE-AC05-00OR22725 with Oak Ridge National
Laboratory, managed and operated by UT-Battelle, LLC.
NR 17
TC 4
Z9 4
U1 0
U2 20
PU MATERIALS RESEARCH SOC
PI WARRENDALE
PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA
SN 0884-2914
J9 J MATER RES
JI J. Mater. Res.
PD DEC
PY 2008
VL 23
IS 12
BP 3281
EP 3287
DI 10.1557/JMR.2008.0393
PG 7
WC Materials Science, Multidisciplinary
SC Materials Science
GA 379YJ
UT WOS:000261432200021
ER
PT J
AU Zhu, YT
Estrin, Y
Langdon, TG
Liao, XZ
Lowe, TC
Shan, ZW
Valiev, RZ
AF Zhu, Yuntian
Estrin, Yuri
Langdon, Terence G.
Liao, Xiaozhou
Lowe, Terry C.
Shan, Zhiwei
Valiev, Ruslan Z.
TI Special Issue: Ultrafine-Grained Materials Preface
SO JOURNAL OF MATERIALS SCIENCE
LA English
DT Editorial Material
C1 [Zhu, Yuntian] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA.
[Estrin, Yuri] Monash Univ, Dept Mat Engn, ARC Ctr Excellence Design Light Met, Clayton, Vic 3800, Australia.
[Estrin, Yuri] Monash Univ, CSIRO, Div Mat Sci & Engn, Clayton, Vic 3169, Australia.
[Langdon, Terence G.] Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA.
[Liao, Xiaozhou] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia.
[Lowe, Terry C.] Los Alamos Natl Lab, Sci & Technol Base Programs, Los Alamos, NM 87545 USA.
[Shan, Zhiwei] Hysitron Inc, Minneapolis, MN 55344 USA.
[Valiev, Ruslan Z.] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa 450000, Russia.
[Langdon, Terence G.] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA.
RP Zhu, YT (reprint author), N Carolina State Univ, Dept Mat Sci & Engn, Box 7907, Raleigh, NC 27695 USA.
EM ytzhu@ncsu.edu; yuri.estrin@eng.monash.edu.au; langdon@usc.edu;
X.Liao@usyd.edu.au; tlowe@lanl.gov; ZShan@hysitron.com;
rzvaliev@mail.rb.ru
RI Langdon, Terence/B-1487-2008; Liao, Xiaozhou/B-3168-2009; Shan,
Zhiwei/B-8799-2014
OI Liao, Xiaozhou/0000-0001-8565-1758;
NR 0
TC 2
Z9 2
U1 1
U2 6
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0022-2461
J9 J MATER SCI
JI J. Mater. Sci.
PD DEC
PY 2008
VL 43
IS 23-24
BP 7255
EP 7256
DI 10.1007/s10853-008-2991-5
PG 2
WC Materials Science, Multidisciplinary
SC Materials Science
GA 387LD
UT WOS:000261952800001
ER
PT J
AU Semenova, IP
Valiev, RZ
Yakushina, EB
Salimgareeva, GH
Lowe, TC
AF Semenova, I. P.
Valiev, R. Z.
Yakushina, E. B.
Salimgareeva, G. H.
Lowe, T. C.
TI Strength and fatigue properties enhancement in ultrafine-grained Ti
produced by severe plastic deformation
SO JOURNAL OF MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT 5th International Symposium on Ultrafine-Grained Materials
CY MAR 09-13, 2008
CL New Orleans, LA
ID BEHAVIOR; TITANIUM
AB Severe plastic deformation (SPD) of titanium creates an ultrafine-grained (UFG) microstructure which results in significantly enhanced mechanical properties, including increasing the high cycle fatigue strength. This work addresses the challenge of maintaining the high level of properties as SPD processing techniques are evolved from methods suitable for producing laboratory scale samples to methods suitable for commercial scale production of titanium semi-products. Various ways to optimize the strength and fatigue endurance limit in long-length Grade 4 titanium rod processed by equal channel angular pressing (ECAP) with subsequent thermal mechanical treatments are considered in this paper. Low-temperature annealing of rods is found to increase the fatigue limit, simultaneously enhancing UFG titanium strength and ductility. The UFG structure in titanium provides an optimum combination of properties when its microstructure includes mostly equiaxed grains with high-angle boundaries, the volume fraction of which is no less than 50%.
C1 [Semenova, I. P.; Valiev, R. Z.; Yakushina, E. B.; Salimgareeva, G. H.] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa 450000, Russia.
[Lowe, T. C.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Semenova, IP (reprint author), Ufa State Aviat Tech Univ, Inst Phys Adv Mat, 12 K Marx Str, Ufa 450000, Russia.
EM semenova-ip@mail.ru; RZValiev@mail.rb.ru
RI Semenova, Irina/K-7508-2014
NR 11
TC 28
Z9 29
U1 3
U2 21
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0022-2461
J9 J MATER SCI
JI J. Mater. Sci.
PD DEC
PY 2008
VL 43
IS 23-24
BP 7354
EP 7359
DI 10.1007/s10853-008-2984-4
PG 6
WC Materials Science, Multidisciplinary
SC Materials Science
GA 387LD
UT WOS:000261952800017
ER
PT J
AU Beyerlein, IJ
Field, RD
Hartwig, KT
Necker, CT
AF Beyerlein, I. J.
Field, R. D.
Hartwig, K. T.
Necker, C. T.
TI Texture development in two-pass ECAE-processed beryllium
SO JOURNAL OF MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT 5th International Symposium on Ultrafine-Grained Materials
CY MAR 09-13, 2008
CL New Orleans, LA
ID CHANNEL ANGULAR EXTRUSION; WROUGHT MAGNESIUM ALLOYS;
FINITE-ELEMENT-ANALYSIS; INTERSTITIAL-FREE STEEL; MICROSTRUCTURE
EVOLUTION; SIMPLE SHEAR; ROUTE-C; CRYSTALLOGRAPHIC TEXTURE;
NEUTRON-DIFFRACTION; PLASTIC-DEFORMATION
AB Texture development and substructure evolution are described for pure beryllium given two-pass equal channel angular extrusion (ECAE) processing following routes A and C. These routes impose different strain paths between the first and second passes-the former cross-shearing and the latter reversal. Polycrystal calculations that are in good agreement with the texture measurements suggest that basal slip and, secondly, prismatic slip are operative in both passes of both routes. Multi scale polycrystal modeling is shown to effectively predict texture evolution to strains of two caused by both ECAE processing routes. Shear-like deformation textures observed in the second pass of route C are explained by differences in deformation characteristics between the first and second passes.
C1 [Beyerlein, I. J.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Field, R. D.; Necker, C. T.] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
[Hartwig, K. T.] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA.
RP Beyerlein, IJ (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM irene@lanl.gov
RI Beyerlein, Irene/A-4676-2011
NR 60
TC 10
Z9 11
U1 0
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0022-2461
J9 J MATER SCI
JI J. Mater. Sci.
PD DEC
PY 2008
VL 43
IS 23-24
BP 7465
EP 7473
DI 10.1007/s10853-008-2635-9
PG 9
WC Materials Science, Multidisciplinary
SC Materials Science
GA 387LD
UT WOS:000261952800034
ER
PT J
AU Percus, AG
Istrate, G
Goncalves, B
Sumi, RZ
Boettcher, S
AF Percus, Allon G.
Istrate, Gabriel
Goncalves, Bruno
Sumi, Robert Z.
Boettcher, Stefan
TI The peculiar phase structure of random graph bisection
SO JOURNAL OF MATHEMATICAL PHYSICS
LA English
DT Article
DE graph theory; random processes; spontaneous symmetry breaking
ID RANDOM SATISFIABILITY PROBLEMS; MEAN-FIELD THEORY; BIPARTITIONING
PROBLEM; OPTIMIZATION; CUTS
AB The mincut graph bisection problem involves partitioning the n vertices of a graph into disjoint subsets, each containing exactly n/2 vertices, while minimizing the number of "cut" edges with an endpoint in each subset. When considered over sparse random graphs, the phase structure of the graph bisection problem displays not only certain familiar properties but also some surprises. It is known that when the mean degree is below the critical value of 2 log 2, the cutsize is zero with high probability. We study how the minimum cutsize increases with mean degree above this critical threshold, finding a new analytical upper bound that improves considerably upon previous bounds. Combined with recent results on expander graphs, our bound suggests the unusual scenario that random graph bisection is replica symmetric up to and beyond the critical threshold, with a replica symmetry breaking transition possibly taking place above the threshold. An intriguing algorithmic consequence is that although the problem is NP-hard, we can conceivably find near-optimal cutsizes (whose ratio to the optimal value approaches 1 asymptotically) in polynomial time for typical instances near the phase transition.
C1 [Percus, Allon G.] Los Alamos Natl Lab, Comp Computat & Stat Sci Div, Informat Sci Grp, Los Alamos, NM 87545 USA.
[Istrate, Gabriel] Univ Calif Los Angeles, Dept Math, Los Angeles, CA 90095 USA.
[Istrate, Gabriel; Sumi, Robert Z.] eAustria Res Inst, RO-300223 Timisoara, Romania.
[Goncalves, Bruno; Boettcher, Stefan] Emory Univ, Dept Phys, Atlanta, GA 30322 USA.
[Sumi, Robert Z.] Univ Babes Bolyai, Dept Phys, RO-400884 Cluj Napoca, Romania.
RP Percus, AG (reprint author), Los Alamos Natl Lab, Comp Computat & Stat Sci Div, Informat Sci Grp, POB 1663, Los Alamos, NM 87545 USA.
EM percus@ipam.ucla.edu; gabrielistrate@acm.org;
bgoncalves@physics.emory.edu; rsumi@phys.ubbcluj.ro;
stb@physics.emory.edu
RI Goncalves, Bruno/A-8541-2009; Boettcher, Stefan/G-2640-2010
OI Goncalves, Bruno/0000-0001-5644-3749; Boettcher,
Stefan/0000-0003-1273-6771
FU U.S. Department of Energy at Los Alamos National Laboratory
[DE-AC52-06NA25396]; Romanian CNCSIS; National Science Foundation
[DMR-0312510]
FX This work was supported by the U.S. Department of Energy at Los Alamos
National Laboratory under Contract No. DE-AC52-06NA25396 through the
Laboratory Directed Research and Development Program, a Marie Curie
International Reintegration Grant within the 6th European Community
Framework Programme, a PN II/Parteneriate grant from the Romanian
CNCSIS, and a National Science Foundation Grant No. DMR-0312510.
NR 33
TC 5
Z9 5
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 0022-2488
J9 J MATH PHYS
JI J. Math. Phys.
PD DEC
PY 2008
VL 49
IS 12
AR 125219
DI 10.1063/1.3043666
PG 13
WC Physics, Mathematical
SC Physics
GA 391HS
UT WOS:000262225000020
ER
PT J
AU Manginell, RP
Adkins, DR
Moorman, MW
Hadizadeh, R
Copic, D
Porter, DA
Anderson, JM
Hietala, VM
Bryan, JR
Wheeler, DR
Pfeifer, KB
Rumpf, A
AF Manginell, Ronald P.
Adkins, Douglas R.
Moorman, Matthew W.
Hadizadeh, Rameen
Copic, Davor
Porter, Daniel Allen
Anderson, John M.
Hietala, Vincent M.
Bryan, Jon R.
Wheeler, David R.
Pfeifer, Kent B.
Rumpf, Arthur
TI Mass-Sensitive Microfabricated Chemical Preconcentrator
SO JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
LA English
DT Article
DE Gas sensing; microanalytical system; microfabricated preconcentrator
(PC); micro gas chromatography (GC); shear modulus of silicon; torsion
ID RECENT ADVANCEMENTS; GAS-CHROMATOGRAPH; SILICON; FOCUSER; SENSOR
AB This paper describes a mass-sensitive microfabricated preconcentrator for use in chemical detection microsystems. The device combines mass sensing and preconcentration to create a smart preconcentrator (SPC) that determines when it has collected sufficient analyte for analysis by a downstream chemical microsystem. The SPC is constructed from a Lorentz-force-actuated pivot-plate resonator with an integrated heater. Subsequent to microfabrication, the SPC is coated with an adsorbent for collection of chemical analytes. The frequency of operation varies inversely with the mass of collected analyte. Such shifts can be measured by a back-EMF in the SPC's drive/transducer line. By using a calibrated vapor system, the limit of detection of the SPC was determined to be less than 50 ppb for dimethyl-methyl-phosphonate (DMMP) (actual limits of detection are omitted due to export control limitations). At 1 ppm of DMMP, 1-s collection was sufficient to trigger analysis in a downstream microsystem; other micropreconcentrators would require an arbitrary collection time, normally set at 1 min or longer. This paper describes the theory of operation, design, fabrication, coating, vapor system testing, and integration of the SPC into microanalytical systems. The theory of operation, which is applicable to other torsional oscillators, is used to predict a shear modulus of silicon (100) of G = 57.0 GPa +/- 2.2 GPa.
C1 [Manginell, Ronald P.; Moorman, Matthew W.; Porter, Daniel Allen; Anderson, John M.; Hietala, Vincent M.; Bryan, Jon R.; Wheeler, David R.; Pfeifer, Kent B.; Rumpf, Arthur] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Adkins, Douglas R.] Defiant Technol, Albuquerque, NM 87109 USA.
[Hadizadeh, Rameen] Georgia Inst Technol, Atlanta, GA 30294 USA.
[Copic, Davor] Univ Michigan, Ann Arbor, MI 48109 USA.
RP Manginell, RP (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM rpmangi@sandia.gov; adkins@defiant-tech.com; mmoorma@sandia.gov;
hadizadeh@gatech.edu; copicd@umich.edu; xquicksilverx@gmail.com;
jmander@sandia.gov; vmhieta@sandia.gov; jrbryan@sandia.gov;
drwheel@sandia.gov
RI Copic, Davor/J-5011-2014
OI Copic, Davor/0000-0002-9346-8846
FU Sandia National Laboratories LDRD program; [DE-AC04-94AL85000]
FX This work was supported by a Sandia National Laboratories LDRD program.
Sandia is a multiprogram laboratory operated by Sandia Corporation, a
Lockheed Martin Company for the U.S. Department of Energy's National
Nuclear Security Administration under Contract DE-AC04-94AL85000.
Subject Editor K. E. Petersen.
NR 38
TC 28
Z9 28
U1 6
U2 15
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1057-7157
J9 J MICROELECTROMECH S
JI J. Microelectromech. Syst.
PD DEC
PY 2008
VL 17
IS 6
BP 1396
EP 1407
DI 10.1109/JMEMS.2008.2004983
PG 12
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Instruments & Instrumentation; Physics, Applied
SC Engineering; Science & Technology - Other Topics; Instruments &
Instrumentation; Physics
GA 382OZ
UT WOS:000261616600012
ER
PT J
AU Lee, J
Spadaccini, CM
Mukerjee, EV
King, WP
AF Lee, Jungchul
Spadaccini, Christopher M.
Mukerjee, Erik V.
King, William P.
TI Differential Scanning Calorimeter Based on Suspended Membrane Single
Crystal Silicon Microhotplate
SO JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
LA English
DT Article
DE Differential scanning calorimeter (DSC); microhotplate; single crystal
silicon; suspended membrane
ID MELTING-POINT DEPRESSION; ULTRATHIN POLYMER-FILMS; OXIDE GAS SENSORS;
MICRO-HOTPLATE; GLASS-TRANSITION; NANOCALORIMETRIC MEASUREMENTS;
THERMAL-ANALYSIS; THIN-FILMS; METAL; TEMPERATURE
AB This paper introduces an array of single crystal silicon microhotplates for differential scanning calorimetry. Heat transfer analysis considers the tradeoffs between heating and cooling rate, temperature uniformity, and measurement sensitivity, and determines the optimal design for a suspended membrane microhotplate with full backside release. Additionally, considering the requirements of routine sample loading, the size of the square heater (L-H) is 100 or 200 mu m, while the size of the backside membrane cavity is 400 mu m. In the heater region, two interdigitated serpentine doped silicon resistors were designed such that several operational configurations were possible. The hotplates exhibited very high heating efficiency of 36.7 K/mW with L-H = 100 mu m and 18.3 K/mW with L-H = 200 mu m while also having time constants on the order of 1 ms. Paraffin wax was mounted on the sensor, and melting was observed when the heater temperature was 55 degrees C with a voltage ramp of 0.2 V/s. With 8 V/s, the paraffin sample was completely consumed within 1 ms with 0.317 mJ of thermal energy extracted. Our design achieves a combination of time constant, temperature sensitivity, and heating efficiency that are comparable or superior to previously published microcalorimeters.
C1 [Lee, Jungchul; King, William P.] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
[Spadaccini, Christopher M.; Mukerjee, Erik V.] Lawrence Livermore Natl Lab, Ctr Micro & Nano Technol, Livermore, CA 94551 USA.
RP Lee, J (reprint author), Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
EM jayclee@mit.edu; spadaccini2@llnl.gov; mukerjee2@llnl.gov; wpk@uiuc.edu
OI Lee, Jungchul/0000-0001-7880-8657
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344 (LLNL-JRNL-404777)]
FX Portions 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 (LLNL-JRNL-404777).
NR 54
TC 13
Z9 13
U1 7
U2 16
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1057-7157
EI 1941-0158
J9 J MICROELECTROMECH S
JI J. Microelectromech. Syst.
PD DEC
PY 2008
VL 17
IS 6
BP 1513
EP 1525
DI 10.1109/JMEMS.2008.2006811
PG 13
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Instruments & Instrumentation; Physics, Applied
SC Engineering; Science & Technology - Other Topics; Instruments &
Instrumentation; Physics
GA 382OZ
UT WOS:000261616600024
ER
PT J
AU Sundaram, A
Maddela, M
Ramadoss, R
Feldner, LM
AF Sundaram, Ananth
Maddela, Madhurima
Ramadoss, Ramesh
Feldner, Lucas M.
TI MEMS-Based Electronically Steerable Antenna Array Fabricated Using PCB
Technology (vol 17, pg 356, 2008)
SO JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
LA English
DT Correction
C1 [Sundaram, Ananth] IBM Corp, Compact Modeling Grp, Bangalore 560071, Karnataka, India.
[Maddela, Madhurima; Ramadoss, Ramesh] Auburn Univ, Dept Elect Engn, Auburn, AL 36849 USA.
[Ramadoss, Ramesh] FormFactor Inc, MEMS R&D Div, Livermore, CA 94551 USA.
[Feldner, Lucas M.] Sandia Natl Labs, Elect Syst Ctr, Albuquerque, NM 87123 USA.
RP Sundaram, A (reprint author), IBM Corp, Compact Modeling Grp, Bangalore 560071, Karnataka, India.
EM anathsund@gmail.com; maddema@auburn.edu; ramadra@auburn.edu;
lmfeldn@sandia.gov
NR 1
TC 0
Z9 0
U1 0
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1057-7157
J9 J MICROELECTROMECH S
JI J. Microelectromech. Syst.
PD DEC
PY 2008
VL 17
IS 6
BP 1556
EP 1556
DI 10.1109/JMEMS.2008.2009737
PG 1
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Instruments & Instrumentation; Physics, Applied
SC Engineering; Science & Technology - Other Topics; Instruments &
Instrumentation; Physics
GA 382OZ
UT WOS:000261616600028
ER
PT J
AU Song, H
Mulukutla, V
James, CD
Bennett, DJ
AF Song, Hongjun
Mulukutla, Vishwanath
James, Conrad D.
Bennett, Dawn J.
TI Continuous-mode dielectrophoretic gating for highly efficient separation
of analytes in surface micromachined microfluidic devices
SO JOURNAL OF MICROMECHANICS AND MICROENGINEERING
LA English
DT Article
ID TOTAL ANALYSIS SYSTEMS; ELECTRIC-FIELDS; CELL; PARTICLES
AB Here, we describe a dielectrophoretic (DEP) gating technique for preconcentrating and separating biological and non-biological particles in a microfluidic device. The microfluidic devices are surface-micromachined on silicon substrates and are fully encapsulated without substrate bonding procedures. DEP gates in the devices consist of embedded microelectrodes that are coupled to the fluid channels for analyte manipulation with electric fields. We consider several different microelectrode designs such as low and high radius-of-curvature edges, and we detail the time- and frequency-dependent preconcentration of particles. Simulations of the particle motion under the manipulation of DEP forces are found to be in good agreement with the experimental results. Experimental results show that bioparticles such as Penicillium brevicompactum (PBC), T-cells and Escherichia coli (E. coli) undergo positive DEP and are trapped in regions of large electric-field gradient adjacent to the DEP gate. In contrast to our previous demonstration of batch-mode separation of particles with different dielectric properties, here we perform a continuous-mode separation of latex particles and E. coli from a mixture.
C1 [Song, Hongjun; Mulukutla, Vishwanath; Bennett, Dawn J.] Univ Maryland Baltimore Cty, Dept Mech Engn, Baltimore, MD 21250 USA.
[James, Conrad D.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Song, H (reprint author), Univ Maryland Baltimore Cty, Dept Mech Engn, Baltimore, MD 21250 USA.
EM hongjs1@umbc.edu; vish1@umbc.edu; cdjame@sandia.gov; dawnb@umbc.edu
FU United States Department of Energy [DE-ACO4-94-AL85000]
FX DB thanks Sandia's MESA Institute and the NSF MAGNET/SEM program for
support. Sandia is a multiprogram laboratory operated by Sandia
Corporation, a Lockheed Martin Company, for the United States Department
of Energy under Contract no DE-ACO4-94-AL85000. Special thanks are due
to Theresa Good and her graduate students at UMBC for supplying the
T-cells and for their laboratory assistance. The authors thank Kishore
Gandaharan for his assistance in preparing the particle suspensions. The
authors would also like to thank Frances Ligler for her consultation in
preparing this manuscript.
NR 26
TC 11
Z9 11
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0960-1317
J9 J MICROMECH MICROENG
JI J. Micromech. Microeng.
PD DEC
PY 2008
VL 18
IS 12
AR 125013
DI 10.1088/0960-1317/18/12/125013
PG 9
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Instruments & Instrumentation; Physics, Applied
SC Engineering; Science & Technology - Other Topics; Instruments &
Instrumentation; Physics
GA 376PW
UT WOS:000261196500013
ER
PT J
AU Cai, ZQ
Guisinger, M
Kim, HG
Ruck, E
Blazier, JC
McMurtry, V
Kuehl, JV
Boore, J
Jansen, RK
AF Cai, Zhengqiu
Guisinger, Mary
Kim, Hyi-Gyung
Ruck, Elizabeth
Blazier, John C.
McMurtry, Vanity
Kuehl, Jennifer V.
Boore, Jeffrey
Jansen, Robert K.
TI Extensive Reorganization of the Plastid Genome of Trifolium subterraneum
(Fabaceae) Is Associated with Numerous Repeated Sequences and Novel DNA
Insertions
SO JOURNAL OF MOLECULAR EVOLUTION
LA English
DT Article
DE Fabaceae; Plastid genome; Repeated sequences; Trifolium
ID REARRANGED CHLOROPLAST GENOME; COMPLETE NUCLEOTIDE-SEQUENCE;
TRANSFER-RNA GENES; BASAL ANGIOSPERM; INVERTED REPEAT; PHYLOGENETIC
IMPLICATIONS; TRACHELIUM-CAERULEUM; DISPERSED REPEATS; MAIZE GENOME;
EVOLUTION
AB The plastid genome of Trifolium subterraneum is 144,763 bp, about 20 kb longer than those of closely related legumes, which also lost one copy of the large inverted repeat (IR). The genome has undergone extensive genomic reconfiguration, including the loss of six genes (accD, infA, rpl22, rpsl6; rpsl8, and ycfl) and two introns (clpP and rpsl2) and numerous gene order changes, attributable to 14-18 inversions. All endpoints of rearranged gene clusters are flanked by repeated sequences, tRNAs, or pseudogenes. One unusual feature of the Trifolium subterraneum genome is the large number of dispersed repeats, which comprise 19.5% (ca. 28 kb) of the genome (versus about 4% for other angiosperms) and account for part of the increase in genome size. Nine genes (psbT, rbcL, clpP, rps3, rpl23, atpB, psbN, tntl-cau, and ycf3) have also been duplicated either partially or completely. 17)123 is the most highly duplicated gene, with portions of this gene duplicated six times. Comparisons of the Trifolium plastid genome with the Plant Repeat Database and searches for flanking inverted repeats suggest that the high incidence of dispersed repeats and rearrangements is not likely the result of transposition. Trifolium has 19.5 kb of unique DNA distributed among 160 fragments ranging in size from 30 to 494 bp, greatly surpassing the other five sequenced legume plastid genomes in novel DNA content. At least some of this unique DNA may represent horizontal transfer from bacterial genomes. These unusual features provide direction for the development of more complex models of plastid genome evolution.
C1 [Jansen, Robert K.] Univ Texas Austin, Sect Integrat Biol, Austin, TX 78712 USA.
[McMurtry, Vanity] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA.
[Kuehl, Jennifer V.; Boore, Jeffrey] DOE Joint Genome Inst, Walnut Creek, CA 94598 USA.
[Boore, Jeffrey] Genome Project Solut, Hercules, CA 94547 USA.
RP Jansen, RK (reprint author), Univ Texas Austin, Sect Integrat Biol, Austin, TX 78712 USA.
EM jansen@mail.utexas.edu
RI Guisinger, Mary/E-9790-2010; Guisinger, Mary/B-8156-2008; Jansen,
Robert/F-6272-2011; cai, zhengqiu/G-2002-2011;
OI Kuehl, Jennifer/0000-0003-2813-2518
FU National Science Foundation [DEB0120709]; University of California,
Lawrence Berkeley National Laboratory [DE-AC02-05CH11231]
FX This work was supported by Grant DEB0120709 from the National Science
Foundation to RX.J. and J.L.B. Part of this work was performed under the
auspices of the U.S. Department of Energy, Office of Biological and
Environmental Research, by the University of California, Lawrence
Berkeley National Laboratory, under contract DE-AC02-05CH11231. We thank
Jeff Palmer for providing the purified plastid DNA used in this study
and Stephen Downie and two anonymous reviewers for valuable comments on
an early draft of the manuscript.
NR 48
TC 60
Z9 68
U1 3
U2 15
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0022-2844
J9 J MOL EVOL
JI J. Mol. Evol.
PD DEC
PY 2008
VL 67
IS 6
BP 696
EP 704
DI 10.1007/s00239-008-9180-7
PG 9
WC Biochemistry & Molecular Biology; Evolutionary Biology; Genetics &
Heredity
SC Biochemistry & Molecular Biology; Evolutionary Biology; Genetics &
Heredity
GA 399ZK
UT WOS:000262837600010
PM 19018585
ER
PT J
AU Kleiner, I
Moazzen-Ahmadi, N
McKellar, ARW
Blake, TA
Sams, RL
Sharpe, SW
Moruzzi, G
Hougen, JT
AF Kleiner, I.
Moazzen-Ahmadi, N.
McKellar, A. R. W.
Blake, T. A.
Sams, R. L.
Sharpe, S. W.
Moruzzi, G.
Hougen, J. T.
TI Assignment, fit, and theoretical discussion of the v(10) band of
acetaldehyde near 509 cm(-1)
SO JOURNAL OF MOLECULAR SPECTROSCOPY
LA English
DT Article
DE Acetaldehyde; Bright state; Torsional bath; Vibration torsion rotation
interaction; Hamiltonian; Least squares fit; Infrared transitions;
Microwave transitions
ID INFRARED-ABSORPTION SPECTROSCOPY; VIBRATION-TORSION-ROTATION;
DIODE-LASER SPECTROSCOPY; FUNDAMENTAL-BAND; RITZ PROGRAM; RESOLUTION;
SPECTRUM; STATE; COMPLEXES
AB The lowest small-amplitude vibration in acetaldehyde (CH(3)CHO) is the in-plane aldehyde scissors mode via at 509 cm(-1). This mode lies about 175 cm(-1) above the top of the barrier to internal rotation of the methyl group and is relatively well separated from other small-amplitude vibrational states (the next fundamental occurring more than 250 cm(-1) higher). It thus provides an excellent example of an isolated small-amplitude fundamental (bright state) embedded in a bath of dark states. Since the bath states at these energies are not too dense, and since they arise purely from states of the large-amplitude torsional vibration of the methyl rotor, a detailed spectroscopic analysis of interactions between the bright state and the bath states should be possible. This paper represents the first step toward that goal. We have assigned several thousand transitions in the v(10) band (J <= 28, K <= 12), and have carried out a simultaneous fit of 2400 of these transitions (J <= 15, K <= 9) with over 8100 transitions to the torsional bath state levels. Three vibration-torsion interactions, which give rise to rather global level shifts of the order of 1 cm(-1) in the v(10) levels, have been identified and quantitatively fit. A number of vibration-torsion-rotation interactions, which give rise to localized (avoided-crossing) shifts in v(10) have also been determined. The present analysis indicates the need for reliable spectroscopic information on more of the torsional bath states in the immediate vicinity of the v(10) levels. Possible ways of obtaining such information in future studies are considered. (C) 2008 Elsevier Inc. All rights reserved.
C1 [Kleiner, I.] Univ Paris 12, CNRS, LISA, F-94010 Creteil, France.
[Kleiner, I.] Univ Paris 07, CNRS, LISA, F-94010 Creteil, France.
[Moazzen-Ahmadi, N.] Univ Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, Canada.
[McKellar, A. R. W.] Natl Res Council Canada, Steacie Inst Mol Sci, Ottawa, ON K1A 0R6, Canada.
[Blake, T. A.; Sams, R. L.; Sharpe, S. W.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Moruzzi, G.] Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy.
[Hougen, J. T.] Natl Inst Stand & Technol, Opt Technol Div, Gaithersburg, MD 20899 USA.
RP Kleiner, I (reprint author), Univ Paris 12, CNRS, LISA, 61 Av Gen Gaulle, F-94010 Creteil, France.
EM kleiner@lisa.univ-paris12.fr
NR 24
TC 7
Z9 7
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 0022-2852
J9 J MOL SPECTROSC
JI J. Mol. Spectrosc.
PD DEC
PY 2008
VL 252
IS 2
BP 214
EP 229
DI 10.1016/j.jms.2008.09.004
PG 16
WC Physics, Atomic, Molecular & Chemical; Spectroscopy
SC Physics; Spectroscopy
GA 382PV
UT WOS:000261618800015
ER
PT J
AU Leonard, JP
Chung, SJ
Nettleship, I
Soong, Y
Martello, DV
Chyu, MK
AF Leonard, J. P.
Chung, S. J.
Nettleship, I.
Soong, Y.
Martello, D. V.
Chyu, M. K.
TI Stability of Zinc Oxide Nanofluids Prepared with Aggregated
Nanocrystalline Powders
SO JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
LA English
DT Article
DE Nanofluids; ZnO (Znic Oxide); Sedimentation; Stability; Thermal
Conductivity
ID THERMAL-CONDUCTIVITY; LASER-ABLATION; NANOPARTICLES; IRRADIATION;
SUSPENSIONS
AB Aqueous zinc oxide (ZnO) suspensions were prepared using a two-step preparation method in which an aggregated nanocrystalline ZnO powder was dispersed in water using a polyelectrolyte. The fluid showed anomalously high thermal conductivity when compared with the Maxwell and Hamilton-Crosser predictions. However, analysis of the particle size distribution showed that the fluid contained aggregated 20 nm crystallites of ZnO with a high volume fraction of particles larger than 100 nm. Sedimentation experiments revealed that particles settled out of the stationary fluid over times ranging from 0.1 hours to well over 10,000 hours. The size of the particles remaining in suspension agreed well with predictions made using Stoke's law, suggesting flocculation was not occurring in the fluids. Finally, a new concept of nanofluid stability is introduced based on the height of the fluid, sedimentation, Brownian motion and the kinetic energy of the particles.
C1 [Leonard, J. P.; Chung, S. J.; Nettleship, I.; Chyu, M. K.] Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USA.
[Leonard, J. P.; Chung, S. J.; Nettleship, I.; Soong, Y.; Martello, D. V.; Chyu, M. K.] US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
RP Chung, SJ (reprint author), Univ Pittsburgh, Dept Mech Engn & Mat Sci, 848 Benedum Hall, Pittsburgh, PA 15261 USA.
RI Martello, Daniele/J-3131-2012
OI Martello, Daniele/0000-0003-2046-3910
FU National Energy Technology Laboratory [DE-C26-04NT41817.606.08.07.104]
FX This research effort was performed in support of the National Energy
Technology Laboratory under Contract DE-C26-04NT41817.606.08.07.104.
NR 21
TC 7
Z9 7
U1 4
U2 10
PU AMER SCIENTIFIC PUBLISHERS
PI STEVENSON RANCH
PA 25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USA
SN 1533-4880
J9 J NANOSCI NANOTECHNO
JI J. Nanosci. Nanotechnol.
PD DEC
PY 2008
VL 8
IS 12
BP 6361
EP 6366
DI 10.1166/jnn.2008.356
PG 6
WC Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials
Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 395ST
UT WOS:000262544500023
PM 19205207
ER
PT J
AU Wu, FX
Zaug, JM
Young, CE
Zhang, JZ
AF Wu, Fanxin
Zaug, Joseph M.
Young, Christopher E.
Zhang, Jin Z.
TI Pressure-induced Phase Transition in Thiol-Capped CdTe Nanoparticles
SO JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
LA English
DT Article
DE CdTe Nanoparticles; Phase Transition
ID HYDROSTATIC-PRESSURE; OPTICAL-ABSORPTION; SEMICONDUCTOR NANOPARTICLES;
CDS MICROCRYSTALS; RAMAN-SCATTERING; BAND-GAP; DEPENDENCE; NANOCRYSTALS;
EDGE; PHOTOLUMINESCENCE
AB Phase transitions for CdTe nanoparticles (NPs) under high pressure up to 37.0 GPa have been studied using fluorescence measurements. The phase transition from cinnarbar to rocksalt phase has been observed in CdTe NPs solution at 5.8 GPa, which is much higher than the phase transition pressure of bulk CdTe (3.8 GPa) and that of CdTe NPs in solid form (0.8 GPa). CdTe NPs solution therefore shows elevated phase transition pressure and enhanced stability against pressure compared with bulk CdTe and CdTe NPs in solid forms. The enhanced stability of CdTe NPs solution has been attributed to possible shape change in the phase transition and/or inhomogeneous strains in nanoparticle solutions.
C1 [Zaug, Joseph M.; Young, Christopher E.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Wu, Fanxin; Zhang, Jin Z.] Univ Calif Santa Cruz, Dept Chem, Santa Cruz, CA 95064 USA.
RP Zaug, JM (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave,L-350, Livermore, CA 94551 USA.
FU American Chemical Society; The National Science Foundation; US
Department of Energy; UCSC Faculty Research Fund; UC Collaborative Lab
Exchange (CLE) Program; US Department of Energy by the Lawrence
Livermore National Laboratory [W-7405-Eng-48]
FX This work was supported by the Petroleum Research Fund administered by
the American Chemical Society, The National Science Foundation, the US
Department of Energy, UCSC Faculty Research Fund, and the UC
Collaborative Lab Exchange (CLE) Program. This work partially performed
under the auspices of the US Department of Energy by the Lawrence
Livermore National Laboratory under contract number W-7405-Eng-48.
NR 33
TC 2
Z9 2
U1 2
U2 10
PU AMER SCIENTIFIC PUBLISHERS
PI STEVENSON RANCH
PA 25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USA
SN 1533-4880
J9 J NANOSCI NANOTECHNO
JI J. Nanosci. Nanotechnol.
PD DEC
PY 2008
VL 8
IS 12
BP 6528
EP 6532
DI 10.1166/jnn.2008.011
PG 5
WC Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials
Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 395ST
UT WOS:000262544500052
PM 19205235
ER
PT J
AU Retterer, ST
Smith, KL
Bjornsson, CS
Turner, JN
Isaacson, MS
Shain, W
AF Retterer, S. T.
Smith, K. L.
Bjornsson, C. S.
Turner, J. N.
Isaacson, M. S.
Shain, W.
TI Constant pressure fluid infusion into rat neocortex from implantable
microfluidic devices
SO JOURNAL OF NEURAL ENGINEERING
LA English
DT Article
ID COMPUTER-INTERFACE BCI; NEUROPROSTHETIC DEVICES; MICROELECTRODE ARRAYS;
CEREBRAL-CORTEX; BRAIN-TISSUE; RESPONSES; OPERATION; DELIVERY; LEVEL;
CELL
AB Implantable electrode arrays capable of recording and stimulating neural activity with high spatial and temporal resolution will provide a foundation for future brain computer interface technology. Currently, their clinical impact has been curtailed by a general lack of functional stability, which can be attributed to the acute and chronic reactive tissue responses to devices implanted in the brain. Control of the tissue environment surrounding implanted devices through local drug delivery could significantly alter both the acute and chronic reactive responses, and thus enhance device stability. Here, we characterize pressure-mediated release of test compounds into rat cortex using an implantable microfluidic platform. A fixed volume of fluorescent cell marker cocktail was delivered using constant pressure infusion at reservoir backpressures of 0, 5 and 10 psi. Affected tissue Volumes were imaged and analyzed using epifluorescence and confocal microscropies and quantitative image analysis techniques. The addressable tissue volume for the 5 and 10 psi infusions, defined by fluorescent staining with Hoescht 33342 dye, was significantly larger than the tissue Volume addressed by simple diffusion (0 psi) and the tissue volume exhibiting insertion-related cell damage (stained by propidium iodide). The results demonstrate the potential for using constant pressure infusion to address relevant tissue Volumes with appropriate pharmacologies to alleviate reactive biological responses around inserted neuroprosthetic devices.
C1 [Smith, K. L.; Bjornsson, C. S.; Turner, J. N.; Shain, W.] New York State Dept Hlth, Wadsworth Ctr, Albany, NY USA.
[Retterer, S. T.] Oak Ridge Natl Lab, Biosci Div, Oak Ridge, TN USA.
[Retterer, S. T.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci Div, Oak Ridge, TN USA.
[Retterer, S. T.] Cornell Univ, Dept Biomed Engn, Ithaca, NY USA.
[Bjornsson, C. S.] Rensselaer Polytech Inst, Ctr Biotechnol & Interdisciplinary Studies, Troy, NY USA.
[Turner, J. N.] SUNY Binghamton, Binghamton, NY USA.
[Isaacson, M. S.] Univ Calif Santa Cruz, Baskin Sch Engn, Santa Cruz, CA 95064 USA.
RP Shain, W (reprint author), New York State Dept Hlth, Wadsworth Ctr, Albany, NY USA.
RI Retterer, Scott/A-5256-2011
OI Retterer, Scott/0000-0001-8534-1979
NR 26
TC 13
Z9 13
U1 0
U2 4
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 1741-2560
J9 J NEURAL ENG
JI J. Neural Eng.
PD DEC
PY 2008
VL 5
IS 4
BP 385
EP 391
DI 10.1088/1741-2560/5/4/003
PG 7
WC Engineering, Biomedical; Neurosciences
SC Engineering; Neurosciences & Neurology
GA 388LD
UT WOS:000262020400003
PM 18827310
ER
PT J
AU Kravitz, E
Biegon, A
AF Kravitz, E.
Biegon, A.
TI Sex and region dependent NMDA receptor (NMDAR) loss and
neuroinflammation in Alzheimer's disease (AD) brains postmortem
SO JOURNAL OF NEURAL TRANSMISSION
LA English
DT Meeting Abstract
CT BrainNet Europe 2nd International Conference on Human Brain Tissue
Research
CY DEC 10-12, 2008
CL Munich, GERMANY
C1 [Kravitz, E.] Tel Aviv Univ, Sheba Med Ctr, IL-69978 Tel Aviv, Israel.
[Biegon, A.] Brookhaven Natl Lab, Upton, NY 11973 USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU SPRINGER WIEN
PI WIEN
PA SACHSENPLATZ 4-6, PO BOX 89, A-1201 WIEN, AUSTRIA
SN 0300-9564
J9 J NEURAL TRANSM
JI J. Neural Transm.
PD DEC
PY 2008
VL 115
IS 12
BP 1725
EP 1725
PG 1
WC Clinical Neurology; Neurosciences
SC Neurosciences & Neurology
GA 376JQ
UT WOS:000261180300052
ER
PT J
AU Stoller, RE
Golubov, SI
Domain, C
Becquart, CS
AF Stoller, R. E.
Golubov, S. I.
Domain, C.
Becquart, C. S.
TI Mean field rate theory and object kinetic Monte Carlo: A comparison of
kinetic models;
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT Symposium on Microstructural Processes in Irradiated Materials held at
the 2007 TMS Annual Meeting
CY FEB 25-MAR 01, 2007
CL Orlando, FL
SP Minerals, Met & Mat Soc
ID RADIATION-DAMAGE; EQUATION; IRRADIATION; NUCLEATION; SIMULATION;
VACANCIES; EVOLUTION; ALLOYS
AB Multiscale modeling schemes encompass models from the atomistic to the continuum scale. Phenomena at the mesoscale have typically been simulated using models based on reaction rate theory, such as mean field rate theory (MFRT) or Monte Carlo. These mesoscale models are appropriate for application to problems that involve intermediate-length scales, and timescales from those characteristic of diffusion to long-term microstructural evolution (similar to mu s to years). Although the MFRT and Monte Carlo models can be used simulate the same phenomena, some of the details are handled quite differently in the two approaches. Models employing the rate theory have been extensively used to describe radiation-induced phenomena such as void swelling and irradiation creep. The primary approximations in such models are time and spatial averaging of the radiation damage source term, and spatial averaging of the microstructure into an effective medium. Kinetic Monte Carlo models can account for these spatial and temporal correlations; their primary limitation is the computational burden, which is related to the size of the simulation cell. Even with modern computers, the maximum simulation cell size and the maximum dose (typically much less than I dpa) that can be simulated are limited. In contrast, even very detailed MFRT models can simulate microstructural evolution for doses Lip 100 dpa or greater in clock times that are relatively short. Within the context of the effective medium, essentially any defect density can be simulated. A direct comparison of MFRT and object kinetic MC simulations has been made in the domain of point defect cluster dynamics modeling, which is relevant to the evolution (both nucleation and growth) of radiation-induced defect structures. Overall, the agreement between the two methods is best for irradiation conditions that produce a high density of defects (lower temperature and higher displacement rate) and for materials that have a relatively high density of fixed sinks such as dislocations. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Stoller, R. E.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Golubov, S. I.] Univ Tennessee, Ctr Mat Proc, Knoxville, TN 37996 USA.
[Domain, C.] EDF R&D Dept MMC, F-77818 Moret Sur Loing, France.
[Becquart, C. S.] Univ Lille 1, Lab Met Phys & Genie Mat, UMR 8517, F-59655 Villeneuve Dascq, France.
RP Stoller, RE (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, POB 2008, Oak Ridge, TN 37831 USA.
EM rkn@ornl.gov
RI Stoller, Roger/H-4454-2011
NR 16
TC 60
Z9 61
U1 2
U2 37
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
EI 1873-4820
J9 J NUCL MATER
JI J. Nucl. Mater.
PD DEC 1
PY 2008
VL 382
IS 2-3
BP 77
EP 90
DI 10.1016/j.jnucmat.2008.08.047
PG 14
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 385WI
UT WOS:000261843900002
ER
PT J
AU Calder, AF
Bacon, DJ
Barashev, AV
Osetsky, YN
AF Calder, Andrew F.
Bacon, David J.
Barashev, Alexander V.
Osetsky, Yuri N.
TI Computer simulation of cascade damage in alpha-iron with carbon in
solution
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT Symposium on Microstructural Processes in Irradiated Materials held at
the 2007 TMS Annual Meeting
CY FEB 25-MAR 01, 2007
CL Orlando, FL
SP Minerals, Met & Mat Soc
ID MOLECULAR-DYNAMICS SIMULATION; DISPLACEMENT CASCADES;
ELECTRON-IRRADIATION; FERRITIC STEELS; METALS; FE; COPPER; CU;
IMPURITIES; ALLOY
AB Molecular dynamics simulation method is used to investigate defect production by displacement cascades in iron with carbon (C) in solution. This is the first study of cascade damage in a metal containing interstitial solute. Iron is of particular interest because of the use of ferritic steels in plant for nuclear power generation. Cascades are simulated with energy in the range 5-20 keV in iron at either 100 or 600 K containing carbon with concentration in the range 0-1 at.%. C in solution has no discernible effect on the number of defects produced in cascades under any of the conditions simulated, nor on the clustered fraction of either self-interstitial atoms (SIAs) or vacancies. However, significant fractions of single SIAs and vacancies are trapped by C in the cascade process, irrespective of cascade energy. The fraction is independent of temperature for vacancies, but increases strongly with temperature for SIAs: this is a consequence of the higher mobility of the SIA. (C) 2008 Published by Elsevier B.V.
C1 [Calder, Andrew F.; Bacon, David J.; Barashev, Alexander V.] Univ Liverpool, Dept Engn, Liverpool L69 3GH, Merseyside, England.
[Osetsky, Yuri N.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Calder, AF (reprint author), Univ Liverpool, Dept Engn, Brownlow Hill, Liverpool L69 3GH, Merseyside, England.
EM afcalder@liv.ac.uk
NR 30
TC 18
Z9 18
U1 1
U2 16
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD DEC 1
PY 2008
VL 382
IS 2-3
BP 91
EP 95
DI 10.1016/j.jnucmat.2008.08.016
PG 5
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 385WI
UT WOS:000261843900003
ER
PT J
AU Malerba, L
Caro, A
Wallenius, J
AF Malerba, Lorenzo
Caro, Alfredo
Wallenius, Janne
TI Multiscale modelling of radiation damage and phase transformations: The
challenge of FeCr alloys
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT Symposium on Microstructural Processes in Irradiated Materials held at
the 2007 TMS Annual Meeting
CY FEB 25-MAR 01, 2007
CL Orlando, FL
SP Minerals, Met & Mat Soc
ID MONTE-CARLO SIMULATIONS; IRON-CHROMIUM-ALLOYS; MOLECULAR-DYNAMICS
SIMULATION; TOTAL-ENERGY CALCULATIONS; SIMPLE FERRITIC ALLOYS; WAVE
BASIS-SET; CR ALLOYS; AB-INITIO; DISPLACEMENT CASCADES;
NEUTRON-IRRADIATION
AB We review the experimental evidence of the non-monotonic behaviour of FeCr alloys versus Cr content, particularly under irradiation (ordering versus segregation tendencies, microstructure and phase evolution, hardening and embrittlement), together with the theoretical efforts done at the electronic and atomic level to interpret them. We summarize the achievements of the two interatomic potentials developed for this system and perform a careful scrutiny of their limitations. We emphasise the difficulties related to the study, at the atomic-level, of concentrated alloys and propose routes to overcome them. Finally, we advance some opinions regarding the crucial points that deserve further investigation in order to fully understand this important binary alloy, at the basis of the steels for current and future nuclear applications. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Malerba, Lorenzo] CEN SCK, Nucl Mat Sci Inst, B-2400 Mol, Belgium.
[Caro, Alfredo] Lawrence Livermore Nat Lab, Chem Mat & Life Sci Directorate, Livermore, CA 94550 USA.
[Wallenius, Janne] AlbaNova Univ Ctr, KTH, Dept Nucl & Reactor Phys, S-10691 Stockholm, Sweden.
RP Malerba, L (reprint author), CEN SCK, Nucl Mat Sci Inst, Boeretang 200, B-2400 Mol, Belgium.
EM lmalerba@sckcen.be
NR 159
TC 68
Z9 70
U1 2
U2 45
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD DEC 1
PY 2008
VL 382
IS 2-3
BP 112
EP 125
DI 10.1016/j.jnucmat.2008.08.014
PG 14
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 385WI
UT WOS:000261843900006
ER
PT J
AU Kurtz, RJ
Heinisch, HL
Gao, F
AF Kurtz, R. J.
Heinisch, H. L.
Gao, F.
TI Modeling of He-defect interactions in ferritic alloys for fusion
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT Symposium on Microstructural Processes in Irradiated Materials held at
the 2007 TMS Annual Meeting
CY FEB 25-MAR 01, 2007
CL Orlando, FL
SP Minerals, Met & Mat Soc
ID HELIUM-VACANCY CLUSTERS; GRAIN-BOUNDARY DEFECTS; ALPHA-FE;
COMPUTER-SIMULATION; DIMER METHOD; IRON; DISLOCATIONS; STEELS
AB High concentrations of helium will be produced in fusion reactor structural materials due to neutron capture reactions. The creep-rupture and fracture properties may be severely degraded if helium aggregates at grain boundaries to a sufficiently high level. To design helium-resistant microstructures requires detailed knowledge of the transport and fate of helium to sinks. We utilize atomistic methods to study the fate of helium in the neighborhood of dislocations, grain boundaries and coherent nano-clusters in alpha-iron. The binding energies of helium to these defects are strongly correlated with excess atomic volume. Molecular dynamics and the dimer saddle point search method were employed to study the mobility of both interstitial helium atoms and helium-vacancy complexes in dislocations and grain boundaries. The migration energy of interstitial helium in these defects was found to range from about 0.4-0.5 eV. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Kurtz, R. J.; Heinisch, H. L.; Gao, F.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Kurtz, RJ (reprint author), Pacific NW Natl Lab, POB 999,P8-15, Richland, WA 99352 USA.
EM rj.kurtz@pnl.gov
RI Gao, Fei/H-3045-2012
NR 27
TC 22
Z9 23
U1 0
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD DEC 1
PY 2008
VL 382
IS 2-3
BP 134
EP 142
DI 10.1016/j.jnucmat.2008.08.020
PG 9
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 385WI
UT WOS:000261843900008
ER
PT J
AU Kondo, S
Katoh, Y
Snead, LL
AF Kondo, S.
Katoh, Y.
Snead, L. L.
TI Microstructural defects in SiC neutron irradiated at very high
temperatures
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT Symposium on Microstructural Processes in Irradiated Materials held at
the 2007 TMS Annual Meeting
CY FEB 25-MAR 01, 2007
CL Orlando, FL
SP Minerals, Met & Mat Soc
ID RESOLUTION ELECTRON-MICROSCOPY; SILICON-CARBIDE; SPIN-RESONANCE;
CERAMICS; ENERGIES; BEHAVIOR; HELIUM; METALS; ALLOYS
AB Microstructures in high purity beta-SiC irradiated with fast neutrons (up to similar to 9.6 x 10(25) n/m(2), in HFIR) at very high temperatures (1130, 1300, and 1460 degrees C) were studied by transmission electron microscopy. Cavities and dislocation loops were generally observed in irradiated samples. The cavities were preferentially formed at grown-in stacking faults, and were spherical in shape below 1300 degrees C and mainly faceted with {111} planes at 1460 degrees C. Estimated volume fractions of observed cavities were much smaller than macroscopic densitometer swelling recently reported, which implies other defects cause the swelling in this temperature regime. Larger Frank loops (>25 nm in radius) formed at 1460 degrees C were identified as interstitial type using the inside/outside method. Unfaulting of the loops was not observed or was very rare. Rapid loop growth and density decrease were observed in the temperature range of 1300-1460 degrees C concurrently with the rapid cavity growth. The limited growth rate of dense loops at lower temperature was discussed in terms of high sink density estimated from a grain-boundary-loop-denuded zone formed at 1130 degrees C. Published by Elsevier B.V.
C1 [Kondo, S.; Katoh, Y.; Snead, L. L.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Kondo, S (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, POB 2008, Oak Ridge, TN 37831 USA.
EM kondos1@ornl.gov
OI Katoh, Yutai/0000-0001-9494-5862
NR 42
TC 39
Z9 40
U1 3
U2 33
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD DEC 1
PY 2008
VL 382
IS 2-3
BP 160
EP 169
DI 10.1016/j.jnucmat.2008.08.013
PG 10
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 385WI
UT WOS:000261843900012
ER
PT J
AU Katoh, Y
Kondo, S
Snead, LL
AF Katoh, Yutai
Kondo, Sosuke
Snead, Lance L.
TI Microstructures of beta-silicon carbide after irradiation creep
deformation at elevated temperatures
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT Symposium on Microstructural Processes in Irradiated Materials held at
the 2007 TMS Annual Meeting
CY FEB 25-MAR 01, 2007
CL Orlando, FL
SP Minerals, Met & Mat Soc
ID EVOLUTION; ISSUES; FIBERS
AB Microstructures of silicon carbide were examined by transmission electron microscopy (TEM) after creep deformation under neutron irradiation. Thin strip specimens of polycrystalline and monocrystalline, chemically vapor-deposited, beta-phase silicon carbide were irradiated in the high flux isotope reactor to 0.7-4.2 dpa at nominal temperatures of 640-1080 degrees C in an elastically pre-strained bend stress relaxation configuration with the initial stress of similar to 100 MPa. Irradiation creep caused permanent strains of 0.6 to 2.3 X 10(-4). Tensile-loaded near-surface portions of the crept specimens were examined by TEM. The main microstructural features observed were dislocation loops in all samples, and appeared similar to those observed in samples irradiated in non-stressed conditions. Slight but statistically significant anisotropy in dislocation loop microstructure was observed in one irradiation condition, and accounted for at least a fraction of the creep strain derived from the stress relaxation. The estimated total volume of loops accounted for 10-45% of the estimated total swelling. The results imply that the early irradiation creep deformation of SiC observed in this work was driven by anisotropic evolutions of extrinsic dislocation loops and matrix defects with undetectable sizes. Published by Elsevier B.V.
C1 [Katoh, Yutai; Kondo, Sosuke; Snead, Lance L.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37830 USA.
RP Katoh, Y (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, POB 2008, Oak Ridge, TN 37830 USA.
EM katohy@ornl.gov
OI Katoh, Yutai/0000-0001-9494-5862
NR 22
TC 12
Z9 13
U1 1
U2 21
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD DEC 1
PY 2008
VL 382
IS 2-3
BP 170
EP 175
DI 10.1016/j.jnucmat.2008.08.012
PG 6
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 385WI
UT WOS:000261843900013
ER
PT J
AU Richter, A
Gheewala, I
Smith, R
Kenny, SD
Valdez, J
Sickafus, K
AF Richter, Asta
Gheewala, Ismail
Smith, Roger
Kenny, Steven D.
Valdez, James
Sickafus, Kurt
TI Changes in the mechanical properties of irradiated MgO(100) crystals
investigated by nanoindentation and computer simulation
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT Symposium on Microstructural Processes in Irradiated Materials held at
the 2007 TMS Annual Meeting
CY FEB 25-MAR 01, 2007
CL Orlando, FL
SP Minerals, Met & Mat Soc
ID MGO SINGLE-CRYSTALS; SENSING INDENTATION; HARDNESS; ORIENTATION
AB This paper presents a nanoindentation study of MgO(100) crystals by experiment and molecular dynamics simulations. The MgO crystals are Ar(+) irradiated up to a fluence of 10(20) Ar(+)/m(2). The materials are compared both before and after irradiation by nanoindentation confirming an increase in hardness but not in the indentation modulus with increasing dose. The experimental and simulation results also indicate that radiation induced defect pinning decreases the dislocation mobility to increase hardness and to cause the material to become less brittle. Molecular dynamic simulation studies confirm the experimental observation for non-irradiated magnesia of pop-in events and slip occurring in the (1 1 0) planes which can result in pile up patterns after indentation which are dependent on crystal orientation. The slip systems can cause the injection of half planes into the upper layers, that often retract after tip removal. This feature can be attributed to the formation and partial recombination of nanocracks. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Richter, Asta] Univ Appl Sci Wildau, Dept Engn, D-15745 Wildau, Germany.
[Gheewala, Ismail; Smith, Roger; Kenny, Steven D.] Univ Loughborough, Dept Math Sci, Loughborough LE11 3TU, Leics, England.
[Valdez, James; Sickafus, Kurt] Los Alamos Natl Lab, MST8, Los Alamos, NM 87545 USA.
RP Richter, A (reprint author), Univ Appl Sci Wildau, Dept Engn, Bahnhofstr 1, D-15745 Wildau, Germany.
EM asta.richter@tfh-wildau.de
RI Smith, Roger/C-2550-2013
NR 21
TC 1
Z9 1
U1 0
U2 15
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD DEC 1
PY 2008
VL 382
IS 2-3
BP 176
EP 183
DI 10.1016/j.jnucmat.2008.08.023
PG 8
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 385WI
UT WOS:000261843900014
ER
PT J
AU Kaoumi, D
Motta, AT
Birtcher, RC
AF Kaoumi, D.
Motta, A. T.
Birtcher, R. C.
TI Influence of alloying elements on grain-growth in Zr(Fe) and Cu(Fe)
thin-films under in situ ion-irradiation
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT Symposium on Microstructural Processes in Irradiated Materials held at
the 2007 TMS Annual Meeting
CY FEB 25-MAR 01, 2007
CL Orlando, FL
SP Minerals, Met & Mat Soc
ID ZR; DIFFUSION; ZIRCONIUM; IRON
AB Thin-films of Zr(Fe) and Cu(Fe) were ion-irradiated in situ in a transmission electron microscope to study the influence of alloying elements on grain-growth. These two systems are different in that Zr-Fe has a negative heat of mixing and Cu-Fe a positive heat of mixing. Irradiations conducted at temperatures of 20-573 K showed precipitation in Zr(Fe) but not in Cu(Fe). The grain sizes increased monotonically with fluence and in both cases the pure metal exhibited more grain-growth than the alloy. A more drastic reduction of grain-growth rate was observed in Zr(Fe) (where precipitate drag occurred) than in Cu-Fe (where only solute drag was available). Zr(Fe) samples were also subjected to 1 MeV electron irradiation but no grain-growth was observed. The results are discussed in terms of the mechanisms of grain-growth under irradiation. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Kaoumi, D.; Motta, A. T.] Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA.
[Birtcher, R. C.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Kaoumi, D (reprint author), Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA.
EM dxk909@psu.edu
NR 26
TC 1
Z9 1
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD DEC 1
PY 2008
VL 382
IS 2-3
BP 184
EP 189
DI 10.1016/j.jnucmat.2008.08.011
PG 6
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 385WI
UT WOS:000261843900015
ER
PT J
AU Cockeram, BV
Ohriner, EK
Byun, TS
Miller, MK
Snead, LL
AF Cockeram, B. V.
Ohriner, E. K.
Byun, T. S.
Miller, M. K.
Snead, L. L.
TI Weldable ductile molybdenum alloy development
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT Symposium on Microstructural Processes in Irradiated Materials held at
the 2007 TMS Annual Meeting
CY FEB 25-MAR 01, 2007
CL Orlando, FL
SP Minerals, Met & Mat Soc
ID GRAIN-BOUNDARY SEGREGATION; TITANIUM-0.1 PCT ZIRCONIUM; REFRACTORY-METAL
ALLOYS; CARBON ARC CAST; FRACTURE-TOUGHNESS; MECHANICAL-PROPERTIES;
TENSILE PROPERTIES; BCC METALS; TSM-10; LCAC
AB Molybdenum and its alloys are attractive structural materials for high-temperature applications. However, various practical issues have limited its use. One concern relates to the loss of ductility occurring in the heat-affected weld zone caused by segregation of oxygen to grain boundaries. In this study, a series of arc melted molybdenum alloys have been produced containing controlled additions of B, C, Zr, and Al. These alloys were characterized with respect to their tensile properties, smooth bend properties, and impact energy for both the base metal and welds. These alloys were compared with a very high purity low carbon arc cast molybdenum reference. For discussion purposes the alloys produced are separated into two categories: Mo-Al-B alloys, and Mo-Zr-B alloys. The properties of Mo-Zr-B alloy welds containing higher carbon levels exhibited slight improvement over unalloyed molybdenum, though the base-metal properties for all Mo-Zr-B alloys were somewhat inconsistent with properties better, or worse, than unalloyed molybdenum. A Mo-Al-B alloy exhibited the best DBTT values for welds, and the base metal properties were comparable to or slightly better than unalloyed molybdenum. The Mo-Al-B alloy contained a low volume fraction of second-phase particles, with segregation of boron and carbon to grain boundaries believed to displace oxygen resulting in improved weld properties. The volume fractions of second-phase particles are higher for the Mo-Zr-B alloys, and these alloys were prone to brittle fracture. It is also noted that these Mo-Zr-B alloys exhibited segregation of zirconium, boron and carbon to the grain boundaries. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Cockeram, B. V.] Bechtel Bettis Atom Power Lab, W Mifflin, PA 15122 USA.
[Ohriner, E. K.; Byun, T. S.; Miller, M. K.; Snead, L. L.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
RP Cockeram, BV (reprint author), Bechtel Bettis Atom Power Lab, POB 79, W Mifflin, PA 15122 USA.
EM cockeram@bettis.gov
NR 38
TC 12
Z9 15
U1 1
U2 15
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD DEC 1
PY 2008
VL 382
IS 2-3
BP 229
EP 241
DI 10.1016/j.jnucmat.2008.08.021
PG 13
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 385WI
UT WOS:000261843900022
ER
PT J
AU Park, SR
Leem, CS
Roh, YS
Choi, KJ
Kim, JH
Kim, BJ
Koh, H
Eisaki, H
Lu, DH
Shen, ZX
Armitage, NP
Kim, C
AF Park, S. R.
Leem, C. S.
Roh, Y. S.
Choi, K. J.
Kim, J. H.
Kim, B. J.
Koh, H.
Eisaki, H.
Lu, D. H.
Shen, Z. -X.
Armitage, N. P.
Kim, C.
TI Rare earth ion effects on the pseudo-gap in electron-doped
superconductors and possible nodeless d-wave gap
SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
LA English
DT Article; Proceedings Paper
CT 61st Yamada Conference on Spectroscopies in Novel Superconductors
CY AUG 20-24, 2007
CL Sendai, JAPAN
SP Yamada Sci Fdn
ID CUPRATE SUPERCONDUCTORS; PHOTOEMISSION
AB We report angle resolved photoemission (ARPES) studies on electron-doped cuprate superconductor SM(2-x)Ce(x)CuO(4) (x = 0.14 and 0.18). A wide energy range scan shows clear "waterfall" effect at an energy scale close to 500 meV which is consistent with the value found in Nd(2-)xCe(x)CuO(4) (NCCO) but larger than that from hole-doped Superconductors. High resolution results from both dopings show pseudo-gap effects that were observed in NCCO. However, the effects are found to be stronger than that observed in optimally doped NCCO. The overall electronic structure is well understood within a simple model in which a root 2 x root 2 static order is assumed. Both ARPES and optical measurements give the coupling strengths to the Q = (pi/2, pi/2) (due to the root 2 x root 2 order) to be about 0.1 eV, compatible with each other. The effect is strong enough to push the band near the nodal region below the Fermi energy, resulting in possible nodeless d-wave superconductivity where zero energy quasi-particle excitation is inhibited. (c) 2008 Elsevier Ltd. All rights reserved.
C1 [Park, S. R.; Leem, C. S.; Roh, Y. S.; Choi, K. J.; Kim, J. H.; Kim, C.] Yonsei Univ, Inst Phys & Appl Phys, Seoul 120749, South Korea.
[Kim, B. J.] Seoul Natl Univ, Sch Phys, Seoul, South Korea.
[Kim, B. J.] Seoul Natl Univ, Ctr Strongly Correlated Mat Res, Seoul, South Korea.
[Koh, H.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Eisaki, H.] Adv Ind Sci & Technol, Tsukuba, Ibaraki, Japan.
[Lu, D. H.; Shen, Z. -X.] Stanford Univ, Dept Phys, Appl Phys & Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA.
[Armitage, N. P.] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
RP Kim, C (reprint author), Yonsei Univ, Inst Phys & Appl Phys, Seoul 120749, South Korea.
EM cykim@phya.yonsei.ac.kr
NR 24
TC 5
Z9 5
U1 0
U2 5
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 DEC
PY 2008
VL 69
IS 12
BP 2939
EP 2943
DI 10.1016/j.jpcs.2008.06.116
PG 5
WC Chemistry, Multidisciplinary; Physics, Condensed Matter
SC Chemistry; Physics
GA 387SF
UT WOS:000261971200005
ER
PT J
AU Grigorenko, I
Fujita, K
Lee, J
Wang, M
Davis, JC
Eisaki, H
Uchida, S
Balatsky, AV
AF Grigorenko, Ilya
Fujita, K.
Lee, J.
Wang, M.
Davis, J. C.
Eisaki, H.
Uchida, S.
Balatsky, Alexander V.
TI Bogoliubov angle and visualization of particle-hole mixture in
superconductors
SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
LA English
DT Article; Proceedings Paper
CT 61st Yamada Conference on Spectroscopies in Novel Superconductors
CY AUG 20-24, 2007
CL Sendai, JAPAN
SP Yamada Sci Fdn
DE Superconductors; Scanning tunnelling microscopy (STM); Defects
ID MAGNETIC-IMPURITIES; BI2SR2CACU2O8+DELTA; TEMPERATURE; EXCITATIONS;
SPECTRUM; STATES; WAVES
AB Superconducting excitations-Bogoliubov quasiparticles-are the quantum mechanical mixture of negatively charged electron (-e) and positively charged hole (+e). Depending on the applied voltage bias in scanning tunneling microscope (STM) one can sample the particle and hole content of such a superconducting excitation. Recent STM experiments offer a unique insight into the inner workings of the superconducting state of superconductors. We propose a new observable quantity for STM studies that is the manifestation of the particle-hole dualism of the quasiparticles. We call it a Bogoliubov angle. This angle measures the relative weight of particle and hole amplitude in the superconducting (Bogoliubov) quasiparticle. We propose that this quantity can be measured locally by comparing the ratio of tunneling currents at positive and negative biases locally. This Bogoliubov angle allows one to measure directly the energy and position dependent particle-hole admixture and therefore visualize robustness of superconducting state locally. It may also allow one to measure the particle-hole admixture of excitations in normal state above critical temperature and thus may be used to measure superconducting correlations in pseudogap state. (c) 2008 Elsevier Ltd. All rights reserved.
C1 [Grigorenko, Ilya; Balatsky, Alexander V.] Los Alamos Natl Lab, Ctr Nonlinear Studies, Theoret Div T 11, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA.
[Fujita, K.; Lee, J.; Wang, M.; Davis, J. C.] Cornell Univ, Dept Phys, LASSP, Ithaca, NY 14853 USA.
[Davis, J. C.] Brookhaven Natl Lab, CMPMS Dept, Upton, NY 11973 USA.
[Eisaki, H.] AIST, Nanoelect Res Inst, Tsukuba 3058568, Japan.
[Uchida, S.] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan.
RP Balatsky, AV (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, Theoret Div T 11, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA.
EM avb@lanl.gov
RI Grigorenko, Ilya/B-5616-2009
NR 22
TC 0
Z9 0
U1 0
U2 6
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 DEC
PY 2008
VL 69
IS 12
BP 3000
EP 3005
DI 10.1016/j.jpcs.2008.06.052
PG 6
WC Chemistry, Multidisciplinary; Physics, Condensed Matter
SC Chemistry; Physics
GA 387SF
UT WOS:000261971200020
ER
PT J
AU Gomes, KK
Pasupathy, AN
Pushp, A
Parker, C
Ono, S
Ando, Y
Gu, G
Yazdani, A
AF Gomes, Kenjiro K.
Pasupathy, Abhay N.
Pushp, Aakash
Parker, Colin
Ono, Shimpei
Ando, Yoichi
Gu, Genda
Yazdani, Ali
TI Mapping of the formation of the pairing gap in Bi2Sr2Ca2CuO8+delta
SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
LA English
DT Article; Proceedings Paper
CT 61st Yamada Conference on Spectroscopies in Novel Superconductors
CY AUG 20-24, 2007
CL Sendai, JAPAN
SP Yamada Sci Fdn
DE Scanning tunneling microscopy; Superconductivity
ID C SUPERCONDUCTOR BI2SR2CACU2O8+DELTA; HIGH-TEMPERATURE SUPERCONDUCTORS;
TUNNELING SPECTROSCOPY; ATOMIC-SCALE; PSEUDOGAP; STATE; EXCITATIONS;
COHERENCE
AB High-resolution scanning tunneling microscopy has been used to study the formation of Cooper pairs in the cuprate superconductor Bi2Sr2CaCu2O8+delta. We measured the evolution of the tunneling gap as function of temperature (from 20 to 180 K) and doping (x = 0.12-0.22). Real space mapping of the density of states establish that the tunneling gap observed below the transition temperature (T-c) vanish inhomogenously in space, leading to the formation of a unique intermediate state, where nanoscale regions of pairing are present. Despite the inhomogeneity, we find that locally the gap spectrum evolves smoothly across T-c and, over a wide range of doping (x >= 0.16), the energy gap triangle vanishes at a temperature T-p, following a local criterion 2 triangle/k(B)T(p) = 7.9 +/- 0.5. Our observations suggest that at least in optimally doped and overdoped samples, all our measurements can be described with one single energy scale and that the gap measured above and below T-c must have the same origin. In the underdoped regime, this simple description fails to capture the temperature evolution of the local electronic states, indicating the presence of an additional phenomenon. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Gomes, Kenjiro K.; Pasupathy, Abhay N.; Pushp, Aakash; Parker, Colin; Yazdani, Ali] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA.
[Ono, Shimpei; Ando, Yoichi] Cent Res Inst Elect Power Ind, Tokyo 2018511, Japan.
[Ando, Yoichi] Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan.
[Gu, Genda] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Yazdani, A (reprint author), Princeton Univ, Dept Phys, Princeton, NJ 08544 USA.
EM yazdani@princeton.edu
RI Pushp, Aakash/G-6626-2011; Ando, Yoichi/B-8163-2013
OI Ando, Yoichi/0000-0002-3553-3355
NR 29
TC 2
Z9 2
U1 3
U2 10
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 DEC
PY 2008
VL 69
IS 12
SI SI
BP 3034
EP 3038
DI 10.1016/j.jpcs.2008.06.136
PG 5
WC Chemistry, Multidisciplinary; Physics, Condensed Matter
SC Chemistry; Physics
GA 387SF
UT WOS:000261971200028
ER
PT J
AU Dong, J
Wu, D
Luo, JL
Li, ME
Luo, XG
Chen, XH
Jin, R
Mandrus, D
Wang, NL
AF Dong, J.
Wu, D.
Luo, J. L.
Li, M. E.
Luo, X. G.
Chen, X. H.
Jin, R.
Mandrus, D.
Wang, N. L.
TI Charge dynamics and optical properties of layered cobaltates
SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
LA English
DT Article; Proceedings Paper
CT 61st Yamada Conference on Spectroscopies in Novel Superconductors
CY AUG 20-24, 2007
CL Sendai, JAPAN
SP Yamada Sci Fdn
DE Electronic materials; Infrared spectroscopy; Optical property
ID MAGNETORESISTANCE; REFLECTIVITY; NAXCOO2; SR
AB We study the charge dynamics and electronic structure by optical spectroscopy technique. Here we focus on the following four issues: (1) the evolution of optical spectra with Na content: (2) the spectral features specific to different regions in the phase diagram; (3) the c-axis optical response for crystal at the A-type antiferromagnetic region; (4) the optical response of misfit-layered Bi(2)M(2)Co(2)O(y) (M = Ba, Sr, Ca) and Ca(3)Co(4)O(y) single crystals. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Dong, J.; Wu, D.; Luo, J. L.; Li, M. E.; Wang, N. L.] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China.
[Li, M. E.; Luo, X. G.; Chen, X. H.] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China.
[Jin, R.; Mandrus, D.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Wang, NL (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, POB 603, Beijing 100080, Peoples R China.
EM nlwang@aphy.iphy.ac.cn
RI Mandrus, David/H-3090-2014
NR 36
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 0022-3697
J9 J PHYS CHEM SOLIDS
JI J. Phys. Chem. Solids
PD DEC
PY 2008
VL 69
IS 12
BP 3052
EP 3057
DI 10.1016/j.jpcs.2008.06.115
PG 6
WC Chemistry, Multidisciplinary; Physics, Condensed Matter
SC Chemistry; Physics
GA 387SF
UT WOS:000261971200033
ER
PT J
AU Dai, PC
Wilson, SD
Li, SL
Wen, HH
AF Dai, Pengcheng
Wilson, Stephen D.
Li, Shiliang
Wen, Hai-Hu
TI Nature of the quantum spin correlations through the
superconducting-normal phase transition in electron-doped
superconducting Pr0.88LaCe0.12CuO4
SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
LA English
DT Article; Proceedings Paper
CT 61st Yamada Conference on Spectroscopies in Novel Superconductors
CY AUG 20-24, 2007
CL Sendai, JAPAN
SP Yamada Sci Fdn
DE Oxides; Superconductors; Neutron scattering; Specific heat
ID TEMPERATURE SUPERCONDUCTOR; RESONANCE
AB We use neutron scattering and specific heat measurements to relate the response of the spin fluctuations and static anti ferromagnetic (AF) order to the superconductivity in the electron-doped high-transition-temperature superconductor, Pr.88LaCe.12CuO4-delta (PLCCO) (T-c = 24 K), as the system is tuned via a magnetic field applied beyond the upper critical field (H-c2) and driven into the normal state. The strength of the collective magnetic excitation commonly termed "resonance" decreases smoothly with increasing field and vanishes in the normal state, paralleling the behavior of the superconducting condensation energy. The suppression of superconductivity is accompanied by a smooth reduction in the very low energy spin fluctuations, and the concomitant emergence of static AF order. Our results suggest an intimate connection between the resonance and the superconducting condensation energy. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Dai, Pengcheng; Wilson, Stephen D.; Li, Shiliang] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Dai, Pengcheng] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
[Wen, Hai-Hu] Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, Beijing 100080, Peoples R China.
RP Dai, PC (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
EM daip@ornl.gov; sdwilson@lbl.gov; slli@utk.edu; hhwen@aphy.iphy.ac.cn
RI Li, Shiliang/B-9379-2009; Dai, Pengcheng /C-9171-2012
OI Dai, Pengcheng /0000-0002-6088-3170
NR 14
TC 0
Z9 0
U1 0
U2 3
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 DEC
PY 2008
VL 69
IS 12
SI SI
BP 3096
EP 3099
DI 10.1016/j.jpcs.2008.06.111
PG 4
WC Chemistry, Multidisciplinary; Physics, Condensed Matter
SC Chemistry; Physics
GA 387SF
UT WOS:000261971200043
ER
PT J
AU Wray, L
Qian, D
Hsieh, D
Xia, Y
Gog, T
Casa, D
Eisaki, H
Hasan, MZ
AF Wray, L.
Qian, D.
Hsieh, D.
Xia, Y.
Gog, T.
Casa, D.
Eisaki, H.
Hasan, M. Z.
TI Intermediate dimensional character of charge transfer excitation modes
in a two-leg cuprate ladder
SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
LA English
DT Article; Proceedings Paper
CT 61st Yamada Conference on Spectroscopies in Novel Superconductors
CY AUG 20-24, 2007
CL Sendai, JAPAN
SP Yamada Sci Fdn
DE Oxides; Electrical properties; Electronic structure
ID SR14CU24O41
AB Collective charge modes in the cuprate ladder compound Sr(14)Cu(24)O(41) are studied over the one-dimensional Brillouin zone using resonant inelastic X-ray scattering. Low energy (2-4eV) spectral weight across the Mott gap is dominated by a broad, dispersive feature containing two distinct peaks that may be interpreted as independent modes. Details of low energy dispersion, intensity distribution across the Brillouin zone and peak composition fall between the characteristic spectra of quasi-ID (e.g. SrCuO(2)) and -2D cuprates (e.g. Nd(2)CuO(4)). We demonstrate that dispersion and splitting between the two observed modes can be understood in a variant of the strong coupling limit (Hubbard-U >> t) with a single band Hubbard model. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Wray, L.; Qian, D.; Hsieh, D.; Xia, Y.; Hasan, M. Z.] Princeton Univ, Joseph Henry Labs, Dept Phys, Princeton, NJ 08544 USA.
[Gog, T.; Casa, D.] Argonne Natl Lab, Adv Photon Source, CMC XOR, Argonne, IL 60439 USA.
[Eisaki, H.] AIST, NeRl, Tsukuba, Ibaraki 3058568, Japan.
RP Wray, L (reprint author), Princeton Univ, Joseph Henry Labs, Dept Phys, Princeton, NJ 08544 USA.
EM lwray@princeton.edu
RI HASAN, M. Zahid/D-8237-2012; Qian, Dong/O-1028-2015; Casa,
Diego/F-9060-2016
NR 12
TC 1
Z9 1
U1 0
U2 1
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 DEC
PY 2008
VL 69
IS 12
BP 3146
EP 3148
DI 10.1016/j.jpcs.2008.06.112
PG 3
WC Chemistry, Multidisciplinary; Physics, Condensed Matter
SC Chemistry; Physics
GA 387SF
UT WOS:000261971200055
ER
PT J
AU Pindzola, MS
Robicheaux, F
Colgan, J
AF Pindzola, M. S.
Robicheaux, F.
Colgan, J.
TI Energy and angle differential cross sections for the electron-impact
double ionization of helium
SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
LA English
DT Article
ID TRIPLE PHOTOIONIZATION; LITHIUM
AB Energy and angle differential cross sections for the electron-impact double ionization of helium are calculated using a non-perturbative time-dependent close-coupling method. Collision probabilities are found by the projection of a time-evolved nine-dimensional coordinate space wavefunction onto fully antisymmetric products of spatial and spin functions representing three outgoing Coulomb waves. At an incident energy of 106 eV, we present double energy differential cross sections and pentuple energy and angle differential cross sections. The pentuple energy and angle differential cross sections are found to be in reasonable agreement with the scaled shapes observed in recent (e, 3e) reaction microscope experiments. Integration of the differential cross sections over all energies and angles yields a total ionization cross section that is also in reasonable agreement with absolute crossed-beams experiments.
C1 [Pindzola, M. S.; Robicheaux, F.] Auburn Univ, Dept Phys, Auburn, AL 36849 USA.
[Colgan, J.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM USA.
RP Pindzola, MS (reprint author), Auburn Univ, Dept Phys, Auburn, AL 36849 USA.
RI Robicheaux, Francis/F-4343-2014;
OI Robicheaux, Francis/0000-0002-8054-6040; Colgan,
James/0000-0003-1045-3858
FU US Department of Energy to Auburn University; Los Alamos National
Laboratory
FX We would like to thank Alexander Dorn of the MPI in Heidelberg, Germany,
for a very useful correspondence. This work was supported in part by
grants from the US Department of Energy to Auburn University and Los
Alamos National Laboratory. Computational work was carried out at the
National Energy Research Scientific Computing Center in Oakland,
California and at the National Center for Computational Sciences in Oak
Ridge, Tennessee.
NR 16
TC 14
Z9 14
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-4075
J9 J PHYS B-AT MOL OPT
JI J. Phys. B-At. Mol. Opt. Phys.
PD DEC
PY 2008
VL 41
IS 23
AR 235202
DI 10.1088/0953-4075/41/23/235202
PG 5
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 378IL
UT WOS:000261314300006
ER
PT J
AU Cayan, FN
Zhi, MJ
Pakalapati, SR
Celik, I
Wu, NQ
Gemmen, R
AF Cayan, Fatma Nihan
Zhi, Mingjia
Pakalapati, Suryanarayana Raju
Celik, Ismail
Wu, Nianqiang
Gemmen, Randall
TI Effects of coal syngas impurities on anodes of solid oxide fuel cells
SO JOURNAL OF POWER SOURCES
LA English
DT Review
DE Solid oxide fuel cell; Coal syngas; Impurities; Review
ID TEMPERATURE H2S REMOVAL; CONTAINING GAS-MIXTURES; OPERATIONAL
TEMPERATURE; PERFORMANCE; SOFC; SYSTEM; GASIFICATION; TESTS; ZNO
AB A literature review is conducted to summarize the studies oil the identification of impurities in coal syngas and their effects on the performance of Ni-yttria stabilized zirconia (Ni-YSZ) anode of solid oxide fuel cells (SOFCs). Coal syngas typically contains major species, CO, H(2), CO(2), H(2)O, CH(4), N(2), and H(2)S as well as trace impurities. Thermodynamic equilibrium calculations have indicated that trace impurities species such as Be, Cr, K, Na, and V in the coal syngas form condensed phases under warm gas cleanup conditions and can be effectively removed by the cleanup processes. For meaningful data comparison, a practical parameter is formulated to quantify the level of degradation normalized with respect to the relevant experimental parameters. Experimental results show that the existence of Hg, Si, Zn and NH(3) in the coal syngas does not significantly affect the performance of the Ni-YSZ anode. The presence of Cd and Se in the syngas impacts the SOFC anode performance to some extent. impurity species such as Cl, Sb, As, and P cause severe cell voltage degradation clue to attack oil the Ni-YSZ anode. Sb, As and P have the potential to react with Ni to form secondary phases in the Ni-YSZ anode, which deteriorate the catalytic activity of the anode. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Cayan, Fatma Nihan; Zhi, Mingjia; Pakalapati, Suryanarayana Raju; Celik, Ismail; Wu, Nianqiang] W Virginia Univ, Dept Mech & Aerosp Engn, Morgantown, WV 26505 USA.
[Gemmen, Randall] US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA.
RP Cayan, FN (reprint author), W Virginia Univ, Dept Mech & Aerosp Engn, POB 6106, Morgantown, WV 26505 USA.
EM fcayan@mix.wvu.edu
RI Zhi, Mingjia/A-6866-2010; Wu, Nianqiang/B-9798-2015; Pakalapati,
Suryanarayana/M-7616-2016
OI Zhi, Mingjia/0000-0002-4291-0809; Wu, Nianqiang/0000-0002-8888-2444;
FU US DOE (Department of Energy) EPSCoR [DE-FG02-06ER46299]
FX This work is conducted under US DOE (Department of Energy) EPSCoR
Program. It is jointly sponsored by US DOE Office of Basic Energy
Sciences, NETL (National Energy Technology Laboratory), WV State EPSCoR
Office and the West Virginia University under grant number
DE-FG02-06ER46299. Dr. Tim Fitzsimmons is the DOE Technical Monitor. Dr.
R. Bajura is the Administrative Manager and Dr. I. Celik is the
Technical Manager and Principal Investigator of this project. We also
wish to thank Prof. Harry O. Finklea for his helpful comments.
NR 34
TC 110
Z9 110
U1 1
U2 47
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 DEC 1
PY 2008
VL 185
IS 2
BP 595
EP 602
DI 10.1016/j.jpowsour.2008.06.058
PG 8
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 384MM
UT WOS:000261748900001
ER
PT J
AU Ominde, N
Bartlett, N
Yang, XQ
Qu, DY
AF Ominde, Narah
Bartlett, Nick
Yang, Xiao-Qing
Qu, Deyang
TI The effect of oxygen reduction on activated carbon electrodes loaded
with manganese dioxide catalyst
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE Design-of-experiment; Oxygen reduction; Gas-diffusion electrode;
Manganese oxide catalyst; Catalytic activity
ID ALKALINE-SOLUTION; ELECTROCATALYTIC ACTIVITY; AIR ELECTRODE; OXIDES;
MECHANISM; CATHODE
AB The statistical design-of-experiment method was used to identify the significant factors for making a manganese oxide-loaded activated carbon matrix. The carbon matrixes, which were made by reacting KMnO4 with carbon material, were tested as gas-diffusion electrodes for oxygen reduction. Three factors-KMnO4 concentration, reaction temperature, and reaction duration were tested in a two-level full-factorial design-of-experiment. The modification of carbon morphology and its effect on the performance of oxygen reduction are discussed. Temperature, KMnO4 concentration, and the interaction between temperature and reaction time were found to have a significant influence on the catalytic activity of the manganese oxide-loaded carbon electrode. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Ominde, Narah; Bartlett, Nick; Qu, Deyang] Univ Massachusetts, Dept Chem, Boston, MA 02125 USA.
[Yang, Xiao-Qing] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RP Qu, DY (reprint author), Univ Massachusetts, Dept Chem, 100 Morrissey Blvd, Boston, MA 02125 USA.
EM deyang.qu@umb.edu
FU U.S. Department of Energy [DEAC02-98CH10886]; UMB
FX The work 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 U.S. Department of Energy under
Contract Number DEAC02-98CH10886. The work at UMB was also partially
supported through UMB faculty start-up grant. Both financial supports
are gratefully acknowledged.
NR 21
TC 31
Z9 32
U1 2
U2 29
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-7753
EI 1873-2755
J9 J POWER SOURCES
JI J. Power Sources
PD DEC 1
PY 2008
VL 185
IS 2
BP 747
EP 753
DI 10.1016/j.jpowsour.2008.07.065
PG 7
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 384MM
UT WOS:000261748900022
ER
PT J
AU Liu, B
Kim, YS
Hu, W
Robertson, GP
Pivovar, BS
Guiver, MD
AF Liu, Baijun
Kim, Yu Seung
Hu, Wei
Robertson, Gilles P.
Pivovar, Bryan S.
Guiver, Michael D.
TI Homopolymer-like sulfonated phenyl- and diphenyl-poly(arylene ether
ketone)s for fuel cell applications
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE Proton exchange membrane; Fuel cell; Single cell performance
ID PROTON-EXCHANGE MEMBRANES; PERFORMANCE; COPOLYMERS
AB Two series of homopolymer-like sulfonated aromatic poly(ether ketone)s (SPEKs) were readily prepared and post-sulfonated using mild conditions. The homopolymer-like SPEKs exhibited advantages in synthesis and physical properties over typical post-sulfonated random copolymers, such as rapid and mild sulfonation conditions, high molecular weights, site specificity and control over IEC, as well as an excellent combination of dimensional swelling stability, low methanol permeability and high proton conductivity. These beneficial membrane properties are reflected in the attractive direct methanol fuel cell (DMFC) and polymer electrolyte membrane fuel cell (PEMFC) performance of these homopolymer-like SPEKs as compared with typical random copolymer SPEKs. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.
C1 [Liu, Baijun; Robertson, Gilles P.; Guiver, Michael D.] Natl Res Council Canada, Inst Chem Proc & Environm Technol, Ottawa, ON K1A 0R6, Canada.
[Kim, Yu Seung; Pivovar, Bryan S.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Liu, Baijun; Hu, Wei] Jilin Univ, Alan G MacDiarmid Inst, Changchun 130023, Peoples R China.
RP Guiver, MD (reprint author), Natl Res Council Canada, Inst Chem Proc & Environm Technol, Ottawa, ON K1A 0R6, Canada.
EM michael.guiver@nrc-cnrc.gc.ca
RI Liu, Brian/A-5069-2013; Guiver, Michael/I-3248-2016
OI Guiver, Michael/0000-0003-2619-6809
FU Los Alamos National Laboratory (LANL); U.S. Department of Energy, Office
of Hydrogen, Fuel Cells and Infrastructure Technologies
FX The work conducted at the Los Alamos National Laboratory (LANL) was
supported by the U.S. Department of Energy, Office of Hydrogen, Fuel
Cells and Infrastructure Technologies.
NR 15
TC 23
Z9 24
U1 0
U2 15
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 DEC 1
PY 2008
VL 185
IS 2
BP 899
EP 903
DI 10.1016/j.jpowsour.2008.08.088
PG 5
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 384MM
UT WOS:000261748900046
ER
PT J
AU Chou, YS
Stevenson, JW
Singh, P
AF Chou, Yeong-Shyung
Stevenson, Jeffry W.
Singh, Prabhakar
TI Effect of aluminizing of Cr-containing ferritic alloys on the seal
strength of a novel high-temperature solid oxide fuel cell sealing glass
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE Seal strength; Sealing glass; Interface; Aluminization; SOFC
ID COMPRESSIVE MICA SEALS; OXIDATION BEHAVIOR; CERAMIC SEALANTS; STEELS;
INTERCONNECT; COATINGS; SYSTEM; ANODE; STACK
AB A novel high-temperature alkaline earth silicate sealing glass was developed for solid oxide fuel cell (SOFC) applications. The glass was used to join two metallic coupons of Cr-containing ferritic stainless steel for seal strength evaluation. In previous work, SrCrO(4) was found to form along the glass/steel interface, which led to severe strength degradation. In the present study. aluminization of the steel surface was investigated as a remedy to minimize or prevent the strontium chromate formation. Three different processes for aluminization were evaluated with Crofer22APU stainless steel: pack cementation, vapor-phase deposition. and aerosol spraying. It was found that pack cementation resulted in a rough surface with occasional cracks in the Al-diffused region. Vapor-phase deposition yielded a smoother surface, but the resulting high Al content increased the coefficient of thermal expansion (CTE), resulting in the failure of joined coupons. Aerosol spraying of an Al-containing salt resulted in the formation of a thin aluminum oxide layer without any surface damage. The room temperature seal strength was evaluated in the as-fired state and in environmentally aged conditions. In contrast to earlier results with uncoated Crofer22APU, the aluminized samples showed no strength degradation even for samples aged in air. Interfacial and chemical compatibility was also investigated. The results showed aluminization to be a viable candidate approach to minimize undesirable chromate formation between alkaline earth silicate sealing glass and Cr-containing interconnect alloys for SOFC applications. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Chou, Yeong-Shyung; Stevenson, Jeffry W.; Singh, Prabhakar] Pacific NW Natl Lab, Energy Mat Dept, Richland, WA 99354 USA.
RP Chou, YS (reprint author), Pacific NW Natl Lab, Energy Mat Dept, K2-44,POB 999, Richland, WA 99354 USA.
EM yeong-shyung.chou@pnl.gov
RI Singh, Prabhakar/M-3186-2013
FU US Department of Energy's Solid-State Energy Conversion Alliance (SECA);
Core Technology Program. Pacific Northwest National Laboratory
FX The authors would like to thank S. Carlson for SEM sample preparation,
and J. Coleman for SEM analysis. Charles Berger of Hitemco, Inc.
provided experimental details regarding the pack cementation and
vapor-phase aluminization processes. This work summarized in this paper
was funded by the US Department of Energy's Solid-State Energy
Conversion Alliance (SECA) Core Technology Program. Pacific Northwest
National Laboratory is operated by Battelle Memorial Institute for the
US Department of Energy under Contract No. DE-AC06-76RLO 1830.
NR 28
TC 44
Z9 44
U1 1
U2 15
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 DEC 1
PY 2008
VL 185
IS 2
BP 1001
EP 1008
DI 10.1016/j.jpowsour.2008.09.004
PG 8
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 384MM
UT WOS:000261748900063
ER
PT J
AU Liu, WN
Sun, X
Khaleel, MA
AF Liu, Wenning
Sun, Xin
Khaleel, Mohammad A.
TI Predicting Young's modulus of glass/ceramic sealant for solid oxide fuel
cell considering the combined effects of aging, micro-voids and
self-healing
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE Temperature-dependent modulus; Aging; Micro-damage; Self-healing;
Glass/ceramic sealant; SOFC
ID GLASS-TRANSITION TEMPERATURE; MECHANICAL-PROPERTIES; SOFC; DEGRADATION;
BEHAVIOR; DEFORMATION; COMPOSITES; POLYMERS; BARIUM; MODEL
AB We Study the temperature dependent Young's modulus for the glass/ceramic seal material used in solid oxide fuel cells (SOFCs). With longer heat treatment or aging time during operation, further devitrification may reduce the residual glass content in the seal material while boosting the ceramic crystalline content. In the meantime, micro-voids induced by the cooling process from the high operating temperature to room temperature can potentially degrade the mechanical properties of the glass/ceramic sealant. Upon reheating to the SOFC operating temperature, possible self-healing phenomenon may occur in the glass/ceramic sealant which can potentially restore some of its mechanical properties. A phenomenological model is developed to model the temperature dependent Young's modulus of glass/ceramic seal considering the combined effects of aging, micro-voids, and possible self-healing. An aging time-dependent crystalline content model is first developed to describe the increase of the crystalline content due to the continuing devitrification under high operating temperature. A continuum damage mechanics (CDM) model is then adapted to model the effects of both cooling induced micro-voids and reheating induced self-healing. This model is applied to model the glass-ceramic G18, a candidate SOFC seal material previously developed at PNNL Experimentally determined temperature-dependent Young's modulus is used to validate the model predictions. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Liu, Wenning; Sun, Xin; Khaleel, Mohammad A.] Pacific NW Natl Lab, Richland, WA 99354 USA.
RP Liu, WN (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99354 USA.
EM wenning.liu@pnl.gov
OI khaleel, mohammad/0000-0001-7048-0749
FU Battelle Memorial Institute for the United States Department of Energy
[DE-AC06-76RL01830]; U.S. Department of Energy's National Energy
Technology Laboratory (NETL)
FX The Pacific Northwest National Laboratory is operated by Battelle
Memorial Institute for the United States Department of Energy under
Contract DE-AC06-76RL01830. The work was funded as part of the
Solid-State Energy Conversion Alliance (SECA) Core Technology Program by
the U.S. Department of Energy's National Energy Technology Laboratory
(NETL).
NR 44
TC 44
Z9 44
U1 2
U2 21
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 DEC 1
PY 2008
VL 185
IS 2
BP 1193
EP 1200
DI 10.1016/j.jpowsour.2008.07.017
PG 8
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 384MM
UT WOS:000261748900087
ER
PT J
AU Brown, S
Ogawa, K
Kumeuchi, Y
Enomoto, S
Uno, M
Saito, H
Sone, Y
Abraham, D
Lindbergh, G
AF Brown, Shelley
Ogawa, Keita
Kumeuchi, Youichi
Enomoto, Shinsuke
Uno, Masatoshi
Saito, Hirobumi
Sone, Yoshitsugu
Abraham, Daniel
Lindbergh, Goeran
TI Cycle life evaluation of 3 Ah Li(x)Mn(2)O(4)-based lithium-ion secondary
cells for low-earth-orbit satellites I. Full cell results
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE Lithium-ion; LEO satellite; Ageing
ID ELEVATED-TEMPERATURE; OPERATION; BATTERIES; AEROSPACE; SPINELS
AB Lithium-ion batteries are a candidate for the energy storage system onboard low-earth-orbit satellites. Cycle life performance under both orbital and terrestrial conditions must be investigated in order to evaluate any inadvertent effects due to the former and the validity of the latter, with a successful comparison allowing for the extension of terrestrial experimental matrices in order to identify the effects of ageing. The orbital Performance of Li(x)Mn(2)O(4)-based pouch cells onboard the microsatellite REIMEI was monitored and compared with terrestrial experiments, with the cells found to be unaffected by orbital conditions. A lifetime matrix of different cycling depths-of-discharge (DODs: 0,20,40%) and temperatures (25, 45 degrees C) was undertaken with periodic reference performance tests. A decrease in both the cell end of-discharge cycling voltage and capacity was accelerated by both higher temperatures and larger DODs. Impedance spectra measured for all ageing conditions indicated that the increase was small, manifested in a state-of-charge dependent increase of the high-frequency semi-circle and a noticeable increase in the high-frequency real axis intercept. An evaluation of the change of both the resistance and capacity of 3 Ah cells led to the development of a potential prognostic state-of-health indicator. The use of elevated temperatures to accelerate cell ageing was validated. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Brown, Shelley; Lindbergh, Goeran] Royal Inst Technol, Sch Chem Sci & Engn, Dept Chem Engn & Technol, SE-10044 Stockholm, Sweden.
[Ogawa, Keita] Adv Engn Serv Co Ltd, Tsukuba, Ibaraki 3050032, Japan.
[Kumeuchi, Youichi; Enomoto, Shinsuke] NEC Tokin Corp, Kanagawa 2291198, Japan.
[Uno, Masatoshi; Saito, Hirobumi; Sone, Yoshitsugu] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan.
[Abraham, Daniel] Argonne Natl Lab, Div Chem Engn, Argonne, IL 60439 USA.
RP Brown, S (reprint author), Royal Inst Technol, Sch Chem Sci & Engn, Dept Chem Engn & Technol, Teknikringen 42, SE-10044 Stockholm, Sweden.
EM shelleyb@kth.se
OI Lindbergh, Goran/0000-0003-2026-5658
FU Swedish Governmental Agency for Innovation Systems; Japan Aerospace
Exploration Agency
FX Financial support from the Swedish Governmental Agency for Innovation
Systems (VINNOVA; Green Car Project) and the Japan Aerospace Exploration
Agency (JAXA) is gratefully acknowledged. Shelley Brown would like to
thank Yoshitsugu Sone, Keita Ogawa and Masatoshi Uno for providing the
resources and support necessary to undertake the lifetime work at JAXA.
NR 19
TC 16
Z9 17
U1 4
U2 41
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 DEC 1
PY 2008
VL 185
IS 2
BP 1444
EP 1453
DI 10.1016/j.jpowsour.2008.07.070
PG 10
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 384MM
UT WOS:000261748900125
ER
PT J
AU Brown, S
Ogawa, K
Kumeuchi, Y
Enomoto, S
Uno, M
Saito, H
Sone, Y
Abraham, D
Lindbergh, G
AF Brown, Shelley
Ogawa, Keita
Kumeuchi, Youichi
Enomoto, Shinsuke
Uno, Masatoshi
Saito, Hirobumi
Sone, Yoshitsugu
Abraham, Daniel
Lindbergh, Goran
TI Cycle life evaluation of 3 Ah LixMn2O4-based lithium-ion secondary cells
for low-earth-orbit satellites II. Harvested electrode examination
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE Lithium-ion; LEO satellite; Ageing; Porous electrode; Impedance;
Three-electrode measurement
ID SPINEL ELECTRODES; ELEVATED-TEMPERATURE; MANGANESE SPINELS; CAPACITY
LOSS; POSITIVE ELECTRODE; CATHODE PARTICLES; POROUS-ELECTRODES; LIMN2O4
CATHODES; BATTERIES; IMPEDANCE
AB Lithium-ion batteries area candidate for the energy storage system onboard low-earth-orbit satellites. Terrestrial experiments are able to capture the performance degradation of cells in orbit, therefore providing the opportunity for lifetime investigations. The lifetime performance of 3 Ah commercial LixMn2O4-based pouch cells was evaluated in a matrix of different cycling depths-of-discharge (DODs: 0, 20,40%) and temperatures (25, 45 degrees C). Aged cells were disassembled and the electrochemical performance of harvested electrodes investigated with two- and three-electrode pouch cells. The positive electrode had a larger decrease in capacity than the negative electrode. Both the positive and negative electrode contributed to the increase of cell impedance measured at high states-of-charge (SOCs). The data at low SOCs indicated that the increase of cell impedance was associated with the positive electrode, which showed a significant increase in the magnitude of the high-frequency semi-circle. This SOC-dependence was observed for cells cycled for either extended periods of time or at higher temperatures with a 40% DOD swing. Low-current cycling of positive electrodes revealed a change in the second potential plateau, possibly reflecting a structural change of the LixMn2O4. This could impact on the electrode kinetics and provide a possible explanation for the SOC-dependent change of the impedance. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Brown, Shelley; Lindbergh, Goran] Royal Inst Technol, Dept Chem Engn & Technol, Sch Chem Sci & Engn, SE-10044 Stockholm, Sweden.
[Ogawa, Keita] Adv Engn Serv Co Ltd, Tsukuba, Ibaraki 3050032, Japan.
[Kumeuchi, Youichi; Enomoto, Shinsuke] NEC Tokin Corp, Kanagawa 2291198, Japan.
[Uno, Masatoshi; Saito, Hirobumi; Sone, Yoshitsugu] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Kanagawa 2298510, Japan.
[Abraham, Daniel] Argonne Natl Lab, Div Chem Engn, Argonne, IL 60439 USA.
RP Brown, S (reprint author), Royal Inst Technol, Dept Chem Engn & Technol, Sch Chem Sci & Engn, Teknikringen 42, SE-10044 Stockholm, Sweden.
EM shelleyb@kth.se
OI Lindbergh, Goran/0000-0003-2026-5658
FU Japan Aerospace Exploration Agency (JAXA)
FX Financial support from the Japan Aerospace Exploration Agency (JAXA) is
gratefully acknowledged. Shelley Brown would like to thank Yoshitsugu
Sone, Keita Ogawa and Masatoshi Uno for providing the resources and
support necessary to undertake the lifetime work at JAXA.
NR 56
TC 9
Z9 9
U1 2
U2 20
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-7753
EI 1873-2755
J9 J POWER SOURCES
JI J. Power Sources
PD DEC 1
PY 2008
VL 185
IS 2
BP 1454
EP 1464
DI 10.1016/j.jpowsour.2008.07.071
PG 11
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 384MM
UT WOS:000261748900126
ER
PT J
AU Tsibakhashvili, N
Kalabegishvili, T
Mosulishvili, L
Kirkesali, E
Kerkenjia, S
Murusidze, I
Holman, H
Frontasyeva, M
Gundorina, S
AF Tsibakhashvili, N.
Kalabegishvili, T.
Mosulishvili, L.
Kirkesali, E.
Kerkenjia, S.
Murusidze, I.
Holman, H. -Y.
Frontasyeva, M. V.
Gundorina, S. F.
TI Biotechnology of Cr(VI) transformation into Cr(III) complexes
SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
LA English
DT Article
ID NEUTRON-ACTIVATION ANALYSIS; BASALT-INHABITING BACTERIA;
ARTHROBACTER-OXYDANS; CHROMIUM; REDUCTION; METALS; RESISTANT; SOILS
AB The dose-dependent formation of Cr(III) complexes and uptake of chromium by Arthrobacter oxydans - a Gram-positive bacterium from contaminated Columbian basalt rocks (USA) - were studied along with the testing under aerobic conditions of two bacterial strains of Arthrobacter genera isolated from the polluted basalts from the Republic of Georgia. Instrumental neutron activation analysis (INAA) was used to track the accumulation of chromium in the bacterial cells. To monitor and identify Cr(III) complexes in these bacteria, electron spin resonance (ESR) spectrometry was employed.
C1 [Tsibakhashvili, N.; Kerkenjia, S.; Murusidze, I.] Chavchavadze State Univ, GE-0178 Tbilisi, Rep of Georgia.
[Tsibakhashvili, N.; Kalabegishvili, T.; Mosulishvili, L.; Kirkesali, E.] Andronikashvili Inst Phys, GE-0177 Tbilisi, Rep of Georgia.
[Holman, H. -Y.] Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Environm Biotechnol, Berkeley, CA 94720 USA.
[Frontasyeva, M. V.; Gundorina, S. F.] Joint Inst Nucl Res, Frank Lab Neutron Phys, Dubna 141980, Moscow Region, Russia.
RP Tsibakhashvili, N (reprint author), Chavchavadze State Univ, 32 Chavchavadze Ave, GE-0178 Tbilisi, Rep of Georgia.
EM ntsiba@gol.ge
RI Holman, Hoi-Ying/N-8451-2014
OI Holman, Hoi-Ying/0000-0002-7534-2625
NR 20
TC 3
Z9 3
U1 0
U2 0
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 DEC
PY 2008
VL 278
IS 3
BP 565
EP 569
DI 10.1007/s10967-008-1006-y
PG 5
WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science &
Technology
SC Chemistry; Nuclear Science & Technology
GA 377PG
UT WOS:000261262500006
ER
PT J
AU Gritti, F
Guiochon, G
AF Gritti, Fabrice
Guiochon, Georges
TI Overloaded elution band profiles of ionizable compounds in
reversed-phase liquid chromatography: Influence of the competition
between the neutral and the ionic species
SO JOURNAL OF SEPARATION SCIENCE
LA English
DT Article
DE Acids and bases compounds; Column heterogeneity; Competitive adsorption
isotherms; C(18) RP columns; Nonlinear chromatography
ID MASS-TRANSFER KINETICS; ORGANIC-SOLVENT MODIFIER; STRONGLY BASIC
COMPOUNDS; ADSORPTION MECHANISM; MOBILE-PHASE; NONLINEAR CHROMATOGRAPHY;
LINEAR CHROMATOGRAPHY; PEAK SHAPE; RETENTION; PERFORMANCE
AB The parameters that affect the shape of the band profiles of acido-basic compounds under moderately overloaded conditions (sample size less than 500 nmol for a conventional column) in RPLC are discussed. Only analytes that have a single pK(a) are considered. In the buffer mobile phase used for their elution, their dissociation may, under certain conditions, cause a significant pH perturbation during the passage of the band. Two consecutive injections (3.3 and 10 mu L) of each one of three sample solutions (0.5, 5, and 50 mM) of ten compounds were injected on five C(18)-bonded packing materials, including the 5 mu m Xterra-C(18) (121 angstrom), 5 mu m Gemini-C(18) (110 angstrom), 5 mu m Luna-C(18)(2) (93 angstrom), 3.5 mu m Extend-C(18) (80 angstrom), and 2.7 mu m Halo-C(18) (90 angstrom). The mobile phase was an aqueous solution of methanol buffered at a constant (w)(W)pH of 6, with a phosphate buffer. The total concentration of the phosphate groups was constant at: 50 mM. The methanol concentration was adjusted to keep all the retention factors between 1 and 10. The compounds injected were phenol, caffeine, 3-phenyl 1-propanol, 2-phenyl butyric acid, amphetamine, aniline, benzylamine, p-toluidine, procainamidium chloride, and propranololium chloride. Depending on the relative values of the analyte pK(a) and the buffer solution pH, these analytes elute as the neutral, the cationic, or the anionic species. The influence of structural parameters such as the charge, the size, and the hydrophobicity of the analytes on the shape of its overloaded band profile is discussed. Simple but general rules predict these shapes. An original adsorption model is proposed that accounts for the unusual peak shapes observed when the analyte is partially dissociated in the buffer Solution during its elution.
C1 [Guiochon, Georges] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
[Gritti, Fabrice] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
RP Guiochon, G (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM guiochon@ion.chem.utk.edu
FU National Science Foundation [CHE06-08659]; US Department of Energy
[DF-FG05-88-ER-13869]; University of Tennessee; Oak Ridge National
Laboratory
FX This work was supported in part by grant CHE06-08659 of the National
Science Foundation, by Grant DF-FG05-88-ER-13869 of the US Department of
Energy, and by the cooperative agreement between the University of
Tennessee and the Oak Ridge National Laboratory.
NR 51
TC 16
Z9 16
U1 1
U2 12
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1615-9306
J9 J SEP SCI
JI J. Sep. Sci.
PD DEC
PY 2008
VL 31
IS 21
BP 3657
EP 3682
DI 10.1002/jssc.200800472
PG 26
WC Chemistry, Analytical
SC Chemistry
GA 384GB
UT WOS:000261732200002
PM 19003808
ER
PT J
AU Leaf, RT
Andrews, AH
Cailliet, GM
Brown, TA
AF Leaf, Robert T.
Andrews, Allen H.
Cailliet, Gregor M.
Brown, Thomas A.
TI THE FEASIBILITY OF BOMB RADIOCARBON ANALYSIS TO SUPPORT AN AGE-AT-LENGTH
RELATIONSHIP FOR RED ABALONE, HALIOTIS RUFESCENS SWAINSON IN NORTHERN
CALIFORNIA
SO JOURNAL OF SHELLFISH RESEARCH
LA English
DT Article
DE accelerator mass spectrometry; carbon-14; von Bertalanffy growth
function; Haliotidae
ID ACCELERATOR MASS-SPECTROMETRY; GROWTH; SHELL; C-14; OTOLITHS;
GASTROPODA; RATES; MATURITY; MOLLUSCA; RECORD
AB Analysis of bomb generated radiocarbon ((14)C) changes in a red abalone, Haliotis rufescens Swainson shell was used to evaluate age-at-length relationships derived from data from a previous multilayer, multisite tag-recapture study. Shell carbonate was extracted from four successive growth trajectory locations in a single shell with a maximum shell length of 251 mm. Extraction locations were based on Von Bertalanffy growth function (VBGF) predictions and chosen to span the initial rise of the (14)C-bomb pulse that is known to have occurred in surface ocean waters during 1958 +/- 1 y in the northeast Pacific. The close temporal correspondence of the red abalone sample series to regional Delta(14)C records demonstrated the utility of the technique for validating age-at-length relationships for the red abalone. The findings provided support for a mean VBGF derived age of 32 y (range 30-33 y) for the specimen; however, the analysis of (14)C data indicated that the specimen could be older.
C1 [Leaf, Robert T.; Andrews, Allen H.; Cailliet, Gregor M.] Moss Landing Marine Labs, Moss Landing, CA 95039 USA.
[Brown, Thomas A.] Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA.
RP Leaf, RT (reprint author), Virginia Polytech Inst & State Univ, Dept Fisheries & Wildlife Sci, 101B Cheatham Hall, Blacksburg, VA 24061 USA.
EM rleaf@vt.edu
RI Andrews, Allen/G-3686-2016
OI Andrews, Allen/0000-0002-9001-8305
FU Marine Biology Trust of Pebble Beach, California; United States
Department of Commerce's National Oceanic and Atmospheric Administration
Under NOAA [NA06RG0142, R/F-190]; California Sea Grant College;
California State Resources Agency; Center for Accelerator Mass
Spectrometry; Lawrence Livermore National Laboratory [W-7405-Eng-48]
FX The authors thank D. Ardizzone and L, Kerr for assistance in Sample
preparation and D. Shoemake For providing the red abalone specimen used
in this study. This, work was supported by the Dr. Earl H. Myers and
Ethel M. Myers Oceanographic and Marine Biology Trust of Pebble Beach,
California. the National Sea Grant College Program of the United States
Department of Commerce's National Oceanic and Atmospheric Administration
Under NOAA Grant number NA06RG0142, project number R/F-190. through the
California Sea Grant College Program and in part by the California State
Resources Agency. This research was also supported by the Center for
Accelerator Mass Spectrometry Under the University Collaborative
Research Program at Lawrence Livermore National Laboratory and was
performed, in part, Under the auspices of the United States Department
of Energy by University of California, Lawrence Livermore National
Laboratory under Contract No. W-7405-Eng-48. The views expressed herein
do not necessarily reflect the views of any of those organizations. The
United States government is authorized to reproduce and distribute for
governmental purposes.
NR 39
TC 2
Z9 2
U1 1
U2 3
PU NATL SHELLFISHERIES ASSOC
PI GROTON
PA C/O DR. SANDRA E. SHUMWAY, UNIV CONNECTICUT, 1080 SHENNECOSSETT RD,
GROTON, CT 06340 USA
SN 0730-8000
J9 J SHELLFISH RES
JI J. Shellfish Res.
PD DEC
PY 2008
VL 27
IS 5
BP 1177
EP 1182
DI 10.2983/0730-8000-27.5.1177
PG 6
WC Fisheries; Marine & Freshwater Biology
SC Fisheries; Marine & Freshwater Biology
GA 383ZE
UT WOS:000261712200014
ER
PT J
AU Rai, D
Yui, M
Moore, DA
Lumetta, GJ
Rosso, KM
Xia, YX
Felmy, AR
Skomurski, FN
AF Rai, Dhanpat
Yui, Mikazu
Moore, Dean A.
Lumetta, Gregg J.
Rosso, Kevin M.
Xia, Yuanxian
Felmy, Andrew R.
Skomurski, Frances N.
TI Thermodynamic Model for ThO2(am) Solubility in Alkaline Silica Solutions
SO JOURNAL OF SOLUTION CHEMISTRY
LA English
DT Article
DE Solubility; Thermodynamics; ThO2(am); Silica; Thorium silicate
complexes; Complexation constants; Thorium
ID HIGH-IONIC-STRENGTH; AQUEOUS-SOLUTION; HYDROLYSIS PRODUCTS; HYDROUS
OXIDE; AB-INITIO; THORIUM; COMPLEXES; CONSTANTS; ELEMENTS; SYSTEMS
AB No thermodynamic data for Th complexes with aqueous Si are available. To obtain such data, extensive studies on ThO2(am) solubility were carried out as functions of: ( 1) a wide range of aqueous silica concentrations ( 0.0004 to 0.14 mol.L-1) at fixed pH values of about 10, 11, 12, and 13; and ( 2) and variable pH ( ranging from 10 to 13.3) at fixed aqueous Si concentrations of about 0.006 mol.L-1 or 0.018 mol.L-1. The samples were equilibrated over long periods ( ranging up to 487 days), and the data showed that steady-state concentrations were reached in < 29 days. X-ray diffraction, FTIR, and Raman analyses of the equilibrated solid phases showed that the Th solids were amorphous ThO2(am) containing some adsorbed Si. The solubility of ThO2(am) at pH values ranging from 10 to 13.3 at fixed 0.018 mol.L-1 aqueous Si concentrations decreases rapidly with an increase in pH, and increases dramatically with an increase in Si concentrations beyond about 0.003 mol.L-1 at fixed pH values > 10. The data were interpreted using both the Pitzer and SIT models, and required only the inclusion of one mixed-hydroxy-silica complex of Th [Th( OH)(3)(H3SiO4)(3)(2-)]. Both models provided similar complexation constant values for the formation of this species. Density functional theory calculations predict complexes of this stoichiometry, having six-fold coordination of the Th cation, to be structurally stable. Predictions based on the fitted value of log(10)K(0) = -18.5 +/- 0.7 for the ThO2(am) solubility reaction involving Th(OH)(3)(H3SiO4)(3)(2-)[ThO2(am) + 3H(4)SiO(4) + H2O reversible arrow Th(OH)(3)(H3SiO4)(3)(2-) + 2H(+)], along with the thermodynamic data for aqueous Si species reported in the literature, agreed closely with the extensive experimental data and showed that under alkaline conditions aqueous Si makes very strong complexes with Th.
C1 [Rai, Dhanpat] Rai Envirochem LLC, Yachats, OR USA.
[Yui, Mikazu] Japan Atom Energy Agcy, Tokai, Ibaraki, Japan.
[Moore, Dean A.; Lumetta, Gregg J.; Rosso, Kevin M.; Xia, Yuanxian; Felmy, Andrew R.; Skomurski, Frances N.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Rai, D (reprint author), Rai Envirochem LLC, Yachats, OR USA.
EM dhan.rai@raienvirochem.com
NR 33
TC 5
Z9 5
U1 1
U2 10
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0095-9782
J9 J SOLUTION CHEM
JI J. Solut. Chem.
PD DEC
PY 2008
VL 37
IS 12
BP 1725
EP 1746
DI 10.1007/s10953-008-9344-5
PG 22
WC Chemistry, Physical
SC Chemistry
GA 366VF
UT WOS:000260510800007
ER
PT J
AU Chernyak, VY
Chertkov, M
AF Chernyak, Vladimir Y.
Chertkov, Michael
TI Fermions and loops on graphs: II. A monomer-dimer model as a series of
determinants
SO JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
LA English
DT Article
DE rigorous results in statistical mechanics; message-passing algorithms;
gauge theories
ID SPIN STRUCTURES; SURFACE GRAPHS; ISING-MODEL
AB We continue the discussion of the fermion models on graphs that started in the first paper of the series. Here we introduce a graphical gauge model (GGM) and show that: (a) it can be stated as an average/sum of a determinant defined on the graph over a Z(2) (binary) gauge field; (b) it is equivalent to the monomer-dimer (MD) model on the graph; (c) the partition function of the model allows an explicit expression in terms of a series over disjoint directed cycles, where each term is a product of local contributions along the cycle and the determinant of a matrix defined on the remainder of the graph (excluding the cycle). We also establish a relation between the MD model on the graph and the determinant series, discussed in the first paper-however, considered using simple non-belief propagation choice of the gauge. We conclude with a discussion of possible analytic and algorithmic consequences of these results, as well as related questions and challenges.
C1 [Chernyak, Vladimir Y.] Wayne State Univ, Dept Chem, Detroit, MI 48202 USA.
[Chernyak, Vladimir Y.; Chertkov, Michael] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
[Chernyak, Vladimir Y.; Chertkov, Michael] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Chernyak, VY (reprint author), Wayne State Univ, Dept Chem, 5101 Cass Ave, Detroit, MI 48202 USA.
EM chernyak@chem.wayne.edu; chertkov@lanl.gov
RI Chertkov, Michael/O-8828-2015; Chernyak, Vladimir/F-5842-2016;
OI Chernyak, Vladimir/0000-0003-4389-4238; Chertkov,
Michael/0000-0002-6758-515X
NR 24
TC 2
Z9 2
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1742-5468
J9 J STAT MECH-THEORY E
JI J. Stat. Mech.-Theory Exp.
PD DEC
PY 2008
AR P12012
DI 10.1088/1742-5468/2008/12/P12012
PG 16
WC Mechanics; Physics, Mathematical
SC Mechanics; Physics
GA 392ZF
UT WOS:000262340000012
ER
PT J
AU Chernyak, VY
Chertkov, M
AF Chernyak, Vladimir Y.
Chertkov, Michael
TI Fermions and loops on graphs: I. Loop calculus for determinants
SO JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
LA English
DT Article
DE rigorous results in statistical mechanics; message-passing algorithms;
gauge theories
ID BELIEF PROPAGATION; ALGORITHMS; MODELS
AB This paper is the first in a series devoted to evaluation of the partition function in statistical models on graphs with loops in terms of the Berezin/fermion integrals. The paper focuses on a representation of the determinant of a square matrix in terms of a finite series, where each term corresponds to a loop on the graph. The representation is based on a fermion version of the loop calculus, previously introduced by the authors for graphical models with finite alphabets. Our construction contains two levels. First, we represent the determinant in terms of an integral over anti-commuting Grassmann variables, with some reparametrization/gauge freedom hidden in the formulation. Second, we show that a special choice of the gauge, called the BP (Bethe-Peierls or belief propagation) gauge, yields the desired loop representation. The set of gauge. xing BP conditions is equivalent to the Gaussian BP equations, discussed in the past as efficient (linear scaling) heuristics for estimating the covariance of a sparse positive matrix.
C1 [Chernyak, Vladimir Y.] Wayne State Univ, Dept Chem, Detroit, MI 48202 USA.
[Chernyak, Vladimir Y.; Chertkov, Michael] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Chernyak, Vladimir Y.; Chertkov, Michael] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Chernyak, VY (reprint author), Wayne State Univ, Dept Chem, 5101 Cass Ave, Detroit, MI 48202 USA.
EM chernyak@chem.wayne.edu; chertkov@lanl.gov
RI Chertkov, Michael/O-8828-2015; Chernyak, Vladimir/F-5842-2016;
OI Chernyak, Vladimir/0000-0003-4389-4238; Chertkov,
Michael/0000-0002-6758-515X
NR 25
TC 3
Z9 3
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1742-5468
J9 J STAT MECH-THEORY E
JI J. Stat. Mech.-Theory Exp.
PD DEC
PY 2008
AR P12011
DI 10.1088/1742-5468/2008/12/P12011
PG 17
WC Mechanics; Physics, Mathematical
SC Mechanics; Physics
GA 392ZF
UT WOS:000262340000011
ER
PT J
AU Zdeborova, L
Mezard, M
AF Zdeborova, Lenka
Mezard, Marc
TI Constraint satisfaction problems with isolated solutions are hard
SO JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
LA English
DT Article
DE analysis of algorithms; message-passing algorithms; random graphs;
networks; typical-case computational complexity
ID RANDOM SATISFIABILITY PROBLEMS; GLASS; RECONSTRUCTION; TREES; PHASE;
TRANSITION; GRAPHS; MODELS; SAT
AB We study the phase diagram and the algorithmic hardness of the random 'locked' constraint satisfaction problems, and compare them to the commonly studied 'non-locked' problems like satisfiability of Boolean formulae or graph coloring. The special property of the locked problems is that clusters of solutions are isolated points. This simplifies significantly the determination of the phase diagram, which makes the locked problems particularly appealing from the mathematical point of view. On the other hand, we show empirically that the clustered phase of these problems is extremely hard from the algorithmic point of view: the best known algorithms all fail to find solutions. Our results suggest that the easy/hard transition (for currently known algorithms) in the locked problems coincides with the clustering transition. These should thus be regarded as new benchmarks of really hard constraint satisfaction problems.
C1 [Zdeborova, Lenka; Mezard, Marc] Univ Paris 11, LPTMS, UMR8626, CNRS, F-91405 Orsay, France.
[Zdeborova, Lenka] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Zdeborova, Lenka] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Zdeborova, L (reprint author), Univ Paris 11, LPTMS, UMR8626, CNRS, Bat 100, F-91405 Orsay, France.
EM zdeborov@lptms.u-psud.fr; mezard@ipno.in2p3.fr
RI Zdeborova, Lenka/B-9999-2014
NR 56
TC 26
Z9 26
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1742-5468
J9 J STAT MECH-THEORY E
JI J. Stat. Mech.-Theory Exp.
PD DEC
PY 2008
AR P12004
DI 10.1088/1742-5468/2008/12/P12004
PG 28
WC Mechanics; Physics, Mathematical
SC Mechanics; Physics
GA 392ZF
UT WOS:000262340000004
ER
PT J
AU Clarey, MG
Botchan, M
Nogales, E
AF Clarey, Megan G.
Botchan, Michael
Nogales, Eva
TI Single particle EM studies of the Drosophila melanogaster origin
recognition complex and evidence for DNA wrapping
SO JOURNAL OF STRUCTURAL BIOLOGY
LA English
DT Article
DE Single particle electron microscopy; Atomic force microscopy; DNA
replication initiation; Origin recognition complex; Metazoan
ID REPLICATION ORIGINS; CHROMOSOME-REPLICATION; EUKARYOTIC CELLS;
ATP-HYDROLYSIS; BINDING; PROTEIN; CHROMATIN; XENOPUS; ORC; YEAST
AB Hyperphosphorylation of the Drosophila melanogaster origin recognition complex (DmORC) by cyclin dependent kinases (CDKs) allows nucleotide binding but inhibits the ATPase activity of Orc1, and ablates the ATP-dependent interaction of ORC with DNA. Here we present single particle electron microscopy ( EM) studies of ORC bound to nucleotide in both the dephosphorylated and hyper-phosphorylated states. 3D image reconstructions show that nucleotide binding gives rise to an analogous conformation independent of phosphorylation state. At the intermediate resolution achieved in our studies, ATP promotes changes along the toroidal core of the complex with negligible differences contributed by phosphorylation. Thus, hyperphosphorylation of DmORC does not induce meso-scale rearrangement of the ORC structure. To better understand ORC's role in origin remodeling, we performed atomic force microscopy (AFM) studies that show the contour length of a 688 bp linear DNA fragment shortens by the equivalent of similar to 130 bp upon ORC binding. This data, coupled with previous studies that showed a linking number change in circular DNA upon ORC binding, suggests that ORC may wrap the DNA in a manner akin to DnaA. Based on existing data and our structures, we propose a subunit arrangement for the AAA+ and winged helix domains, and in addition, speculate on a path of the 133 bp of DNA around the ORC complex. (C) 2008 Elsevier Inc. All rights reserved.
C1 [Clarey, Megan G.; Botchan, Michael; Nogales, Eva] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
[Nogales, Eva] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
[Nogales, Eva] Univ Calif Berkeley, Howard Hughes Med Inst, Berkeley, CA 94720 USA.
RP Botchan, M (reprint author), Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
EM mbotchan@berkeley.edu; enogales@lbl.gov
FU US National Institutes of Health [R39 CA 30490]
FX The authors acknowledge Carlos Bustamante, Dirk Remus, Patricia Grob and
Hong Wei Wang for technical assistance and helpful discussion. This work
was supported by US National Institutes of Health grant R39 CA 30490 to
M. B., and by a Biomedicine chair from the BBVA Foundation to E. N. E.N.
is a Howard Hughes Medical Institute Investigator.
NR 45
TC 20
Z9 20
U1 0
U2 1
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1047-8477
J9 J STRUCT BIOL
JI J. Struct. Biol.
PD DEC
PY 2008
VL 164
IS 3
BP 241
EP 249
DI 10.1016/j.jsb.2008.08.006
PG 9
WC Biochemistry & Molecular Biology; Biophysics; Cell Biology
SC Biochemistry & Molecular Biology; Biophysics; Cell Biology
GA 423UM
UT WOS:000264521200001
PM 18824234
ER
PT J
AU Hu, MH
Zhang, YB
Qian, LP
Brinas, RP
Kuznetsova, L
Hainfeld, JF
AF Hu, Minghui
Zhang, Yian-Biao
Qian, Luping
Brinas, Raymond P.
Kuznetsova, Larisa
Hainfeld, James F.
TI Three-dimensional structure of human chromatin accessibility complex
hCHRAC by electron microscopy
SO JOURNAL OF STRUCTURAL BIOLOGY
LA English
DT Article
DE hCHRAC; Nucleosome; Three-dimensional structure; Electron microscopy;
Chromatin remodeling
ID REMODELING COMPLEX; SACCHAROMYCES-CEREVISIAE; NUCLEOSOME; ISWI; DNA;
SUBUNIT; FOLD; ACF; VISUALIZATION; CHRAC
AB ATP-dependent chromatin remodeling complexes modulate the dynamic assembly and remodeling of chromatin involved in DNA transcription, replication, and repair. There is little structural detail known about these important multiple-subunit enzymes that catalyze chromatin remodeling processes. Here we report a three-dimensional structure of the human chromatin accessibility complex, hCHRAC, using single particle reconstruction by negative stain electron microscopy. This structure shows an asymmetric 15 x 10 x 12 nm disk shape with several lobes protruding out of its surfaces. Based on the factors of larger contact area, smaller steric hindrance, and direct involvement of hCHRAC in interactions with the nucleosome, we propose that four lobes on one side form a multiple-site contact surface 10 nm in diameter for nucleosome binding. This work provides the first determination of the three-dimensional structure of the ISWI-family of chromatin remodeling complexes. (C) 2008 Elsevier Inc. All rights reserved.
C1 [Hu, Minghui; Zhang, Yian-Biao; Qian, Luping; Brinas, Raymond P.; Kuznetsova, Larisa; Hainfeld, James F.] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
RP Hainfeld, JF (reprint author), Brookhaven Natl Lab, Dept Biol, Bldg 463, Upton, NY 11973 USA.
EM hainfeld@bnl.gov
FU BNL LDRD [04-055]; DOE [06742]; NIH [P41EB002181, R01RR017545]
FX We are greatly indebted to Dr. Elena S. Lymar (BNL) for biochemical
preparation, cloning, purification, and characterization of component
proteins and reconstitution of the hCHRAC complex. This work was
supported by BNL LDRD Grant 04-055 and DOE Grant 06742 and NIH Grants
P41EB002181 and R01RR017545.
NR 49
TC 6
Z9 6
U1 0
U2 3
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1047-8477
J9 J STRUCT BIOL
JI J. Struct. Biol.
PD DEC
PY 2008
VL 164
IS 3
BP 263
EP 269
DI 10.1016/j.jsb.2008.08.007
PG 7
WC Biochemistry & Molecular Biology; Biophysics; Cell Biology
SC Biochemistry & Molecular Biology; Biophysics; Cell Biology
GA 423UM
UT WOS:000264521200004
PM 18814851
ER
PT J
AU Mitchell, AC
Phillips, AJ
Hamilton, MA
Gerlach, R
Hollis, WK
Kaszuba, JP
Cunningham, AB
AF Mitchell, Andrew C.
Phillips, Adrienne J.
Hamilton, Marty A.
Gerlach, Robin
Hollis, W. Kirk
Kaszuba, John P.
Cunningham, Alfred B.
TI Resilience of planktonic and biofilm cultures to supercritical CO2
SO JOURNAL OF SUPERCRITICAL FLUIDS
LA English
DT Article
DE Biofilm; Bacillus mojavensis; Planktonic; Supercritical CO2;
Sterilization; Carbon sequestration
ID PRESSURE CARBON-DIOXIDE; EXPLOSIVE DECOMPRESSION; CALCIUM-CARBONATE;
BACILLUS-SUBTILIS; INACTIVATION; SPORES; BACTERIA; MICROORGANISMS;
SYSTEM; EXOPOLYSACCHARIDES
AB Supercritical CO2 has been shown to act as a disinfectant against microorganisms. These organisms have most often been tested in vegetative or spore form. Since biofilm organisms are typically more resilient to physical, chemical, and biological stresses than the same organisms in planktonic form, they are often considered more difficult to eradicate. it is therefore hypothesized that supercritical CO2 (SC-CO2) induced inactivation of biofilm organisms would be less effective than against planktonic (suspended) growth cultures of the same organism. Six-day old biofilm cultures as well as suspended planktonic cultures of Bacillus mojavensis were exposed to flowing SC-CO2 at 136 atm and 35 degrees C for 19 min and slowly depressurized after treatment. After SC-CO2 exposure, B. mojavensis samples were analyzed for total and viable cells. Suspended cultures revealed a 3 log(10) reduction while biofilm cultures showed a 1 log(10) reduction in viable cell numbers. These data demonstrate that biofilm cultures of B. mojavensis are more resilient to SC-CO2 than suspended planktonic communities. It is hypothesized that the small reduction in the viability of biofilm microorganisms reflects the protective effects of extracellular polymeric substances (EPS) which make up the biofilm matrix, which offer mass transport resistance, a large surface area, and a number of functional groups for interaction with and immobilization Of CO2. The resistance of biofilm suggests that higher pressures, longer durations Of SC-CO2 exposure, and a quicker depressurization rate may be required to eradicate biofilms during the sterilization of heat-sensitive materials in medical and industrial applications. However, the observed resilience of biofilms to SC-CO2 is particularly promising for the prospective application of subsurface biofilms in the subsurface geologic sequestration of CO2 (C) 2008 Elsevier B.V. All rights reserved.
C1 [Mitchell, Andrew C.; Phillips, Adrienne J.; Hamilton, Marty A.; Gerlach, Robin; Cunningham, Alfred B.] Montana State Univ, Ctr Biofilm Engn, Bozeman, MT 59717 USA.
[Hollis, W. Kirk; Kaszuba, John P.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Cunningham, AB (reprint author), Montana State Univ, Ctr Biofilm Engn, POB 173980, Bozeman, MT 59717 USA.
EM al_c@erc.montana.edu
RI Gerlach, Robin/A-9474-2012
FU Zero Emissions Research Technology (ZERT); U.S. Department of Energy
(DOE) [DE-FC26-04NT42262]
FX This work was funded by the Zero Emissions Research Technology (ZERT)
fund, from the U.S. Department of Energy (DOE), Award No.
DE-FC26-04NT42262. However, any opinions, findings, conclusions, or
recommendations expressed herein are those of the authors and do not
necessarily reflect the views of the DOE.
NR 51
TC 46
Z9 48
U1 0
U2 19
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0896-8446
J9 J SUPERCRIT FLUID
JI J. Supercrit. Fluids
PD DEC
PY 2008
VL 47
IS 2
BP 318
EP 325
DI 10.1016/j.supflu.2008.07.005
PG 8
WC Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 374DB
UT WOS:000261021600028
ER
PT J
AU Liu, Y
Gorton, I
Lee, VK
AF Liu, Yan
Gorton, Ian
Lee, Vinh Kah
TI The architecture of an event correlation service for adaptive
middleware-based applications
SO JOURNAL OF SYSTEMS AND SOFTWARE
LA English
DT Article; Proceedings Paper
CT Australian Software Engineering Conference
CY APR 10-13, 2007
CL Melbourne, AUSTRALIA
SP Data Proc, Infosys Australia, Davies Collison Cave, Object Consulting, Sun Microsyst Lab, Swinburne Univ Technol, IT Today, Elsevier Australia
DE Event correlation; Middleware; Common-based event; Web services
AB Loosely coupled component communication driven by events is a key mechanism for building middleware-based applications that must achieve reliable qualities of service in an adaptive manner. In such a system, events that encapsulate state snapshots of a running system are generated by monitoring components. Hence, an event correlation service is necessary for correlating monitored events from multiple sources. The requirements for the event correlation raise two challenges: to seamlessly integrate event correlation services with other services and applications; and to provide reliable event management with minimal delay. This paper describes our experience in the design and implementation of an event correlation service. The design encompasses an event correlator and an event proxy that are integrated with an architecture for adaptive middleware components. The implementation utilizes the common-based event (CBE) specification and stateful Web service technologies to support the deployment of the event correlation service in a distributed architecture. We evaluate the performance of the overall solution in a test bed and present the results in terms of the trade-off between the flexibility and the performance overhead of the architecture. (C) 2008 Elsevier Inc. All rights reserved.
C1 [Liu, Yan; Lee, Vinh Kah] Natl ICT Australia, Sydney, NSW, Australia.
[Gorton, Ian] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Liu, Y (reprint author), Natl ICT Australia, Sydney, NSW, Australia.
EM jenny.liu@nicta.com.au; ian.gorton@pnl.gov; vinkkah.lee@nicta.com.au
RI Gorton, Ian/A-8247-2009
NR 16
TC 0
Z9 1
U1 0
U2 1
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0164-1212
J9 J SYST SOFTWARE
JI J. Syst. Softw.
PD DEC
PY 2008
VL 81
IS 12
SI SI
BP 2134
EP 2145
DI 10.1016/j.jss.2008.03.061
PG 12
WC Computer Science, Software Engineering; Computer Science, Theory &
Methods
SC Computer Science
GA 375NE
UT WOS:000261119800004
ER
PT J
AU Blanchard, CL
Tanenbaum, S
Lawson, DR
AF Blanchard, Charles L.
Tanenbaum, Shelley
Lawson, Douglas R.
TI Differences between Weekday and Weekend Air Pollutant Levels in Atlanta;
Baltimore; Chicago; Dallas-Fort Worth; Denver; Houston; New York;
Phoenix; Washington, DC; and Surrounding Areas
SO JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
LA English
DT Article
ID EASTERN UNITED-STATES; AMERICAN ELECTRICAL BLACKOUT; NITROGEN-OXIDES
EMISSIONS; 8-HR OZONE CONCENTRATIONS; MOTOR-VEHICLE EMISSIONS;
WEEKDAY/WEEKEND DIFFERENCES; ATMOSPHERIC CHEMISTRY; ACCIDENTAL
EXPERIMENT; PRECURSOR REDUCTIONS; SOUTHERN CALIFORNIA
AB We evaluated day-of-week differences in mean concentrations of ozone (O(3)) precursors (nitric oxide [NO], nitrogen oxides [NO(x)], carbon monoxide [CO], and volatile organic compounds [VOCs]) at monitoring sites in 23 states comprising seven geographic focus areas over the period 1998-2003. Data for VOC measurements were available for six metropolitan areas in five regions. We used Wednesdays to represent weekdays and Sundays to represent weekends; we also analyzed Saturdays. At many sites, NO, NO(x), and CO mean concentrations decreased at all individual hours from 6:00 a.m. to 3:00 p.m. on Sundays compared with corresponding Wednesday means. Statistically significant (p < 0.01) weekend decreases in ambient concentrations were observed for 92% of NO(x) sites, 89% of CO sites, and 23% of VOC sites. Nine-hour (6:00 a.m. to 3:00 p.m.) mean concentrations of NO NO(x), CO, and VOCs declined by 65, 49, 28, and 19%, respectively, from Wednesdays to Sundays (median site responses). Despite the large reductions in ambient NO(x) and moderate reductions in ambient CO and VOC concentrations on weekends, ozone and particulate matter (PM) nitrate did not exhibit large changes from weekdays to weekends. The median differences between Wednesday and Sunday mean ozone concentrations at all monitoring sites ranged from 3% higher on Sundays for peak 8-hr concentrations determined from all monitoring days to 3.8% lower on Sundays for peak 1-hr concentrations on extreme-ozone days. Eighty-three percent of the sites did not show statistically significant differences between Wednesday and weekend mean concentrations of peak ozone. Statistically significant weekend ozone decreases occurred at 6% of the sites and significant increases occurred at 11% of the sites. Average PM nitrate concentrations were 2.6% lower on Sundays than on Wednesdays. Statistically significant Sunday PM nitrate decreases occurred at one site and significant increases occurred at seven sites.
C1 [Blanchard, Charles L.; Tanenbaum, Shelley] Envair, Albany, CA 94706 USA.
[Lawson, Douglas R.] Natl Renewable Energy Lab, Golden, CO USA.
RP Blanchard, CL (reprint author), Envair, 526 Cornell Ave, Albany, CA 94706 USA.
EM cbenvair@pacbell.net
FU U.S. Department of Energy; Office of Vehicle Technologies
FX Support for this work was provided by the U.S. Department of Energy,
Office of Vehicle Technologies, Chief Scientist Dr. James Eberhardt. The
Coordinating Research Council and the Lake Michigan Air Directors
Consortium provided funding for related work, some of which has been
incorporated into this paper. The authors also thank the reviewers who
provided constructive technical and editorial suggestions to earlier
versions of this paper.
NR 60
TC 28
Z9 28
U1 9
U2 29
PU AIR & WASTE MANAGEMENT ASSOC
PI PITTSBURGH
PA ONE GATEWAY CENTER, THIRD FL, PITTSBURGH, PA 15222 USA
SN 1047-3289
J9 J AIR WASTE MANAGE
JI J. Air Waste Manage. Assoc.
PD DEC
PY 2008
VL 58
IS 12
BP 1598
EP 1615
DI 10.3155/1047-3289.58.12.1598
PG 18
WC Engineering, Environmental; Environmental Sciences; Meteorology &
Atmospheric Sciences
SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric
Sciences
GA 382PR
UT WOS:000261618400009
PM 19189758
ER
PT J
AU Zhang, GN
Roy, BK
Allard, LF
Cho, JH
AF Zhang, Guangneng
Roy, Biplab K.
Allard, Lawrence F.
Cho, Junghyun
TI Titanium Oxide Nanoparticles Precipitated from Low-Temperature Aqueous
Solutions: I. Nucleation, Growth, and Aggregation
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID SELF-ASSEMBLED MONOLAYERS; TIO2 THIN-FILMS; SOLUTION DEPOSITION; IRON
OXYHYDROXIDE; HYDROLYSIS; MECHANISMS; BEHAVIOR; ZRO2
AB Titanium oxide (TiO(2)) thin films can be prepared by controlled hydrolysis of a titanium tetrachloride (TiCl(4)) precursor in an aqueous solution at temperatures below 100 degrees C. As part of an effort to understand the formation of such TiO(2) films, the kinetics of the nucleation, growth, and aggregation of TiO(2) nanoparticles in aqueous solutions of TiCl(4) were studied using dynamic light scattering and a transmission electron microscope (TEM). A higher degree of supersaturation, produced by a higher solution temperature, a higher concentration of TiCl(4), or a higher pH, results in a shorter nucleation induction time, a faster initial growth/aggregation rate, and a larger aggregate size. The interfacial energy of TiO(2) nanoparticles was found to be 0.072 J/m(2) from the homogeneous nucleation theory. Further investigations by a high-resolution scanning electron microscope (SEM) and TEM for the as-deposited films showed the structure hierarchy organized from nanocrystalline particles precipitated in the supersaturated solution. As a result, the effect of solution conditions on the nucleation, growth, and aggregation of TiO(2) nanoparticles can provide useful guidance for tailoring of microstructures of the TiO(2) films.
C1 [Zhang, Guangneng; Roy, Biplab K.; Cho, Junghyun] SUNY Binghamton, Dept Mech Engn, Binghamton, NY 13902 USA.
[Zhang, Guangneng; Roy, Biplab K.; Cho, Junghyun] SUNY Binghamton, Mat Sci & Engn Program, Binghamton, NY 13902 USA.
[Allard, Lawrence F.] Oak Ridge Natl Lab, Mat Sci & Technol Div, High Temp Mat Lab, Oak Ridge, TN 37831 USA.
RP Cho, JH (reprint author), SUNY Binghamton, Dept Mech Engn, Binghamton, NY 13902 USA.
EM jcho@binghamton.edu
FU New York State Office of Science, Technology and Academic Research
(NYSTAR)
FX This research was financially supported by the New York State Office of
Science, Technology and Academic Research (NYSTAR).
NR 31
TC 25
Z9 25
U1 1
U2 17
PU WILEY-BLACKWELL PUBLISHING, INC
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 DEC
PY 2008
VL 91
IS 12
BP 3875
EP 3882
DI 10.1111/j.1551-2916.2008.02781.x
PG 8
WC Materials Science, Ceramics
SC Materials Science
GA 384AC
UT WOS:000261714700008
ER
PT J
AU Williford, RE
Johnson, KI
Sundaram, SK
Pilli, S
AF Williford, Ralph E.
Johnson, Kenneth I.
Sundaram, S. Kamakshi
Pilli, Siva
TI Effective Diffusivity and Spalling Models for Slagging Coal Gasifiers
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID REFRACTORIES; MORPHOLOGY; FILMS
AB Spalling reduces the lifetime of hot-face refractory linings in slagging coal gasifiers, and has an important impact on the economics of coal gasification. Spalling is caused by ingress of the molten slag into the porous refractory, followed by reaction with the refractory to produce either volumetric expansion (compressive stresses) or volumetric shrinkage (tensile stresses). In this paper, ingress of the molten slag into the porous refractory is described by an effective diffusivity that treats simultaneous capillary and diffusive mechanisms in terms of the average pore radius and the slag viscosity. This effective diffusivity can be applied in spalling models to estimate spall thicknesses that are useful for determining whether the spall originated from tensile or compressive mechanisms.
C1 [Williford, Ralph E.; Johnson, Kenneth I.; Sundaram, S. Kamakshi; Pilli, Siva] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Williford, RE (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM Rick.Williford@pnl.gov
FU PNNL Laboratory Directed Research and Development Program (Energy
Conversion Initiative); Battelle Memorial Institute [DE-AC06-76RLO-1830]
FX This work was supported by the PNNL Laboratory Directed Research and
Development Program (Energy Conversion Initiative). Pacific Northwest
National Laboratory is operated for the US Department of Energy (DOE) by
Battelle Memorial Institute under contract DE-AC06-76RLO-1830.
NR 24
TC 7
Z9 7
U1 0
U2 3
PU WILEY-BLACKWELL PUBLISHING, INC
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 DEC
PY 2008
VL 91
IS 12
BP 4016
EP 4022
DI 10.1111/j.1551-2916.2008.02755.x
PG 7
WC Materials Science, Ceramics
SC Materials Science
GA 384AC
UT WOS:000261714700030
ER
PT J
AU Kulkarni, NS
Besmann, TM
Spear, KE
AF Kulkarni, Nagraj S.
Besmann, Theodore M.
Spear, Karl E.
TI Thermodynamic Optimization of Lithia-Alumina
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID CRYSTAL STRUCTURE; PHASE-DIAGRAM; WASTE GLASS; MODEL; OXIDE; SYSTEMS;
ALLOYS
AB The optimization of thermodynamic parameters in the Li(2)O-Al(2)O(3) system using available thermodynamic and assessed phase diagram data is discussed. A procedure for obtaining a suitable associate species solution model for the liquid in this system is presented. It is shown that if the eutectic near the pure alumina composition is ignored during the optimization, the optimized thermodynamic parameters in this system result in a phase diagram that is in reasonable agreement with the experimental one. Optimized thermodynamic parameters for the associate species in the associate species liquid model and the solids in this system are provided. An optimized associate-regular solution model with a reduced number of associates in the liquid is also provided as a comparison.
C1 [Kulkarni, Nagraj S.; Besmann, Theodore M.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Spear, Karl E.] CasitaCalc, Clearfield, PA 16830 USA.
RP Kulkarni, NS (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Ctr Mat Proc, Knoxville, TN 37996 USA.
EM kulkarnins@ornl.gov
FU U. S. Department of Energy [DE-AC05-00OR22725]
FX The research was supported by the DOE Office of Biological and
Environmental Research, U. S. Department of Energy, under Contract
DE-AC05-00OR22725 with Oak Ridge National Laboratory, managed and
operated by UT-Battelle LLC. The authors are grateful to John Vienna,
Jarrod Crum, Diana Tran, Pavel Hrma, and Jonathan Hanni, our
collaborators at Pacific Northwest National Laboratory, for useful
discussions during the course of this work. The authors also thank John
Vitek and Michael Brady at Oak Ridge National Laboratory for reviewing
our manuscript.
NR 30
TC 5
Z9 5
U1 1
U2 4
PU WILEY-BLACKWELL PUBLISHING, INC
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 DEC
PY 2008
VL 91
IS 12
BP 4074
EP 4083
DI 10.1111/j.1551-2916.2008.02753.x
PG 10
WC Materials Science, Ceramics
SC Materials Science
GA 384AC
UT WOS:000261714700038
ER
PT J
AU Soyk, MW
Zhao, Q
Houk, RS
Badman, ER
AF Soyk, Matthew W.
Zhao, Qin
Houk, R. S.
Badman, Ethan R.
TI A Linear Ion Trap Mass Spectrometer with Versatile Control and Data
Acquisition for Ion/Ion Reactions
SO JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
LA English
DT Article
ID ELECTRON-TRANSFER DISSOCIATION; OF-FLIGHT SYSTEM; IONIZATION; PARKING;
PERFORMANCE; EJECTION; CATIONS; FIELDS; ANIONS; ESI
AB A linear ion trap (LIT) with electrospray ionization (ESI) for top-down protein analysis has been constructed. An independent atmospheric sampling glow discharge ionization (ASGDI) Source produces reagent ions for ion/ion reactions. The device is also meant to enable a wide variety of ion/ion reaction Studies. To reduce the instrument's complexity and make it available for wide dissemination, only a few simple electronics components were Custom built. The instrument functions as both a reaction vessel for gas-phase ion/ion reactions and a mass spectrometer using mass-selective axial ejection. Initial results demonstrate trapping efficiency of 70% to 90% and the ability to perform proton transfer reactions on intact protein ions, including dual polarity storage reactions, transmission mode reactions, and ion parking. (J Am Soc Mass Spectrom 2008, 19, 1821-1831) (c) 2008 Published by Elsevier Inc. on behalf of American Society for Mass Spectrometry
C1 [Soyk, Matthew W.; Zhao, Qin; Houk, R. S.] Iowa State Univ, Dept Chem, Ames, IA USA.
[Houk, R. S.] Iowa State Univ, US Dept Energy, Ames Lab, Ames, IA USA.
RP Soyk, MW (reprint author), Hoffmann La Roche Inc, Nonclin Safety, 340 Kingsland St, Nutley, NJ 07110 USA.
EM ethan.badman@roche.com
RI Guo, Henry/E-9618-2011
FU Iowa State University; Richard A. Schaeffer Memorial Travel Award;
Velmer A. and Mary K. Fassel Fellowship; Conoco-Phillips Fellowship;
GAANN Fellowship
FX The authors acknowledge funding for this work by a grant from the Iowa
State University Vice Provost for Research. M.W.S. acknowledges Extrel
CMS for the Richard A. Schaeffer Memorial Travel Award to present this
work at the 2006 ASMS Conference. M.W.S. also acknowledges the Velmer A.
and Mary K. Fassel Fellowship (Iowa State University, 2006-2007), the
Conoco-Phillips Fellowship (Iowa State University, 2006-2007), and the
GAANN Fellowship (Iowa State University, 2008) for financial support.
NR 33
TC 5
Z9 5
U1 0
U2 5
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 DEC
PY 2008
VL 19
IS 12
BP 1821
EP 1831
DI 10.1016/j.jasms.2008.08.020
PG 11
WC Chemistry, Analytical; Chemistry, Physical; Spectroscopy
SC Chemistry; Spectroscopy
GA 385IW
UT WOS:000261808900014
PM 18838277
ER
PT J
AU Koizumi, H
Whitten, WB
Reilly, PTA
AF Koizumi, Hideya
Whitten, William B.
Reilly, Peter T. A.
TI Trapping of Intact, Singly-Charged, Bovine Serum Albumin Ions Injected
from the Atmosphere with a 10-cm Diameter, Frequency-Adjusted Linear
Quadrupole Ion Trap
SO JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
LA English
DT Article
ID ELECTROSPRAY-IONIZATION; AERODYNAMIC LENSES
AB High-resolution real-time particle mass measurements have not been achievable because the enormous amount of kinetic energy imparted to the particles upon expansion into vacuum competes with and overwhelms the forces applied to the charged particles within the mass spectrometer. It is possible to reduce the kinetic energy of a collimated particulate ion beam through collisions with a buffer gas while radially constraining their motion using a quadrupole guide or trap over a limited mass range. Controlling the pressure drop of the final expansion into a quadrupole trap permits a much broader mass range at the cost of sacrificing collimation. To achieve high-resolution mass analysis of massive particulate ions, an efficient trap with a large tolerance for radial divergence of the injected ions was developed that permits trapping a large range of ions for on-demand injection into an awaiting mass analyzer. The design specifications required that frequency of the trapping potential be adjustable to cover a large mass range and the trap radius be increased to increase the tolerance to divergent ion injection. The large-radius linear quadrupole ion trap was demonstrated by trappin,singly-charged bovine serum albumin ions for on-demand injection into a mass analyzer. Additionally, this work demonstrates the ability to measure an electrophoretic mobility cross section (or ion mobility) of singly-charged intact proteins in the low-pressure regime. This work represents a large step toward the goal of high-resolution analysis of intact proteins, RNA, DNA, and viruses. (J Am Soc Mass Spectrom 2008,19,1942-1947) (C) 2008 Published by Elsevier Inc. on behalf of American Society for Mass Spectrometry
C1 [Koizumi, Hideya; 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 U.S. Department of Energy; Office of Nonproliferation Research and
Engineering with Oak Ridge National Laboratory [DE-AC05-00OR22725]
FX The authors acknowledge funding for this research by the U.S. Department
of Energy, Office of Nonproliferation Research and Engineering, under
contract no. DE-AC05-00OR22725 with Oak Ridge National Laboratory,
managed and operated by UT-Battelle, LLC.
NR 12
TC 12
Z9 12
U1 1
U2 10
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 DEC
PY 2008
VL 19
IS 12
BP 1942
EP 1947
DI 10.1016/j.jasms.2008.08.007
PG 6
WC Chemistry, Analytical; Chemistry, Physical; Spectroscopy
SC Chemistry; Spectroscopy
GA 385IW
UT WOS:000261808900026
PM 18783963
ER
PT J
AU Mechem, DB
Kogan, YL
Ovtchinnikov, M
Davis, AB
Evans, KF
Ellingson, RG
AF Mechem, David B.
Kogan, Yefim L.
Ovtchinnikov, Mikhail
Davis, Anthony B.
Evans, K. Franklin
Ellingson, Robert G.
TI Multidimensional Longwave Forcing of Boundary Layer Cloud Systems
SO JOURNAL OF THE ATMOSPHERIC SCIENCES
LA English
DT Article
ID LARGE-EDDY SIMULATION; RADIATIVE-TRANSFER; STRATOCUMULUS CLOUDS;
EXPLICIT MICROPHYSICS; INDEPENDENT PIXEL; CUMULUS CLOUDS; ENTRAINMENT;
FIELDS; FLUXES; ATMOSPHERES
AB The importance of multidimensional (MD) longwave radiative effects on cloud dynamics is evaluated in an eddy-resolving model (ERM)-the two-dimensional analog to large-eddy simulation (LES)-frame-work employing multidimensional radiative transfer [Spherical Harmonics Discrete Ordinate Method (SHDOM)]. Simulations are performed for a case of unbroken, marine boundary layer stratocumulus and a broken field of trade cumulus. "Snapshot" calculations of MD and independent pixel approximation (IPA; 1D) radiative transfer applied to simulated cloud fields show that the total radiative forcing changes only slightly, although the MD effects significantly modify the spatial structure of the radiative forcing. Simulations of each cloud type employing MD and IPA radiative transfer, however, differ little. For the solid cloud case, relative to using IPA, the MD simulation exhibits a slight reduction in entrainment rate and boundary layer total kinetic energy (TKE) relative to the IPA simulation. This reduction is consistent with both the slight decrease in net radiative forcing and a negative correlation between local vertical velocity and radiative forcing, which implies a damping of boundary layer eddies. Snapshot calculations of the broken cloud case suggest a slight increase in radiative cooling, although few systematic differences are noted in the interactive simulations. This result is attributed to the fact that radiative cooling is a relatively minor contribution to the total energetics. For the cloud systems in this study, the use of IPA longwave radiative transfer is sufficiently accurate to capture the dynamical behavior of boundary layer clouds. Further investigations are required to generalize this conclusion for other cloud types and longer time integrations.
C1 [Mechem, David B.] Univ Kansas, Dept Geog, Lawrence, KS 66045 USA.
[Mechem, David B.; Kogan, Yefim L.] Univ Oklahoma, Cooperat Inst Mesoscale Meteorol Studies, Norman, OK 73019 USA.
[Ovtchinnikov, Mikhail] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Davis, Anthony B.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Davis, Anthony B.] Univ Colorado, Boulder, CO 80309 USA.
[Ellingson, Robert G.] Florida State Univ, Tallahassee, FL 32306 USA.
RP Mechem, DB (reprint author), Univ Kansas, Dept Geog, 1475 Jayhawk Blvd,213 Lindley Hall, Lawrence, KS 66045 USA.
EM dmechem@ku.edu
FU Office of Science (BER); U.S. Department of Energy [DE-FG0205ER64062];
ONR [N00014-05-1-0550, N00014-03-1-0304]; NOAA/Office of Oceanic and
Atmospheric Research [NA17RJ1227]
FX We wish to acknowledge Bob Cahalan and Ezra Takara for their early
encouragement in this effort. We greatly appreciate constructive
suggestions from Steve Krueger and an anonymous reviewer. This research
was supported by the Office of Science (BER), U.S. Department of Energy,
Grant DE-FG0205ER64062, as part of the Atmospheric Radiation Measurement
Program; by ONR grants N00014-05-1-0550 and N00014-03-1-0304; and by
NOAA/Office of Oceanic and Atmospheric Research under NOAA-University of
Oklahoma Cooperative Agreement NA17RJ1227, U.S. Department of Commerce.
Some of the computing for this project was performed at the OU
Supercomputing Center for Education and Research (OSCER) at the
University of Oklahoma.
NR 39
TC 2
Z9 2
U1 0
U2 2
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0022-4928
EI 1520-0469
J9 J ATMOS SCI
JI J. Atmos. Sci.
PD DEC
PY 2008
VL 65
IS 12
BP 3963
EP 3977
DI 10.1175/2008JAS2733.1
PG 15
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 387ZP
UT WOS:000261990400019
ER
PT J
AU Na, YS
Kessel, CE
Park, JM
AF Na, Yong-Su
Kessel, C. E.
Park, J. M.
TI Simulation of Hybrid Operation Modes in ITER
SO JOURNAL OF THE KOREAN PHYSICAL SOCIETY
LA English
DT Article
DE Tokamak; Scenario; Hybrid; Modeling; ASTRA; ITER
ID IMPROVED H-MODE; GENERAL AXISYMMETRICAL EQUILIBRIA; INTERNAL TRANSPORT
BARRIER; ASDEX-UPGRADE; NEOCLASSICAL CONDUCTIVITY; ADVANCED SCENARIOS;
CHAPTER 1; DIII-D; CONFINEMENT; DISCHARGES
AB As one of the international thermonuclear experimental reactor (ITER) primary operation modes, the hybrid mode aims at establishing plasmas with significant fusion power and low loop voltage to drive an inductive current to test reactor-relevant components in extended pulse lengths at high neutron fluence. In this paper, predictive modeling of the hybrid mode is presented. The potential of hybrid modes is investigated with respect to fusion performance and the non-inductive current drive fraction in ITER. Simulations are performed with the ASTRA transport code by employing a physics-based heat transport model. Here, the particle transport is prescribed. The effect of electron cyclotron current drive (ECCD) to establish a low magnetic shear in the center of the plasma is also discussed. The simulations show that fusion gains and the non-inductive current drive fractions of up to 8.4 and 49 %, respectively, can be achieved in hybrid modes at ITER.
C1 [Na, Yong-Su] Seoul Natl Univ, Dept Nucl Engn, Seoul 151744, South Korea.
[Na, Yong-Su] Natl Fus Res Inst, Taejon 305806, South Korea.
[Kessel, C. E.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Park, J. M.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
RP Na, YS (reprint author), Seoul Natl Univ, Dept Nucl Engn, Seoul 151744, South Korea.
EM ysna@snu.ac.kr
FU Korean Science and Engineering Foundation (KOSEF); Korea goverment
(MEST) [R11-2008-072-01002-0]
FX The authors would like to express deep gratitude to Steady State
Operation Topical Group members of the International Tokamak Physics
Activity for fruitful discussions. This work was partly supported by the
Korean Science and Engineering Foundation (KOSEF) grant funded by the
Korea goverment (MEST) (No. R11-2008-072-01002-0).
NR 35
TC 1
Z9 1
U1 0
U2 3
PU KOREAN PHYSICAL SOC
PI SEOUL
PA 635-4, YUKSAM-DONG, KANGNAM-KU, SEOUL 135-703, SOUTH KOREA
SN 0374-4884
J9 J KOREAN PHYS SOC
JI J. Korean Phys. Soc.
PD DEC
PY 2008
VL 53
IS 6
BP 3788
EP 3792
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 384FZ
UT WOS:000261732000048
ER
PT J
AU Rodriguez, G
Valenzuela, AR
Yellampalle, B
Schmitt, MJ
Kim, KY
AF Rodriguez, George
Valenzuela, Anthony R.
Yellampalle, Balakishore
Schmitt, Mark J.
Kim, Ki-Yong
TI In-line holographic imaging and electron density extraction of ultrafast
ionized air filaments
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
LA English
DT Article
ID FEMTOSECOND LASER-PULSES; PLASMA FILAMENTS; PROPAGATION; IONIZATION;
INTERFEROMETRY; CONDUCTIVITY; INTENSITY; DYNAMICS; MEDIA; BEAMS
AB In-line spatial holographic methods are used to image the optical diffraction patterns of ultrafast laser produced plasma filaments in air. Using femtosecond laser pump-probe methods the plasma filament is produced and subsequently probed by a time-delayed probe beam traversing the filament at a right angle. The resulting probe beam image is recorded as a holographic diffraction pattern on a charge coupled device camera as the probe beam is diffracted due to the optical index change caused by the plasma filament. Extraction of the electron density in the filament down to 10(16) cm(-3) is obtained by using the Helmholtz wave equation beam propagation model to simulate the data. By varying the pump-probe optical time delay, a plasma electron recombination time of approximately 250 ps is measured and agrees with our rate equation population kinetics model. (C) 2008 Optical Society of America
C1 [Rodriguez, George; Valenzuela, Anthony R.; Yellampalle, Balakishore; Kim, Ki-Yong] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA.
[Schmitt, Mark J.] Los Alamos Natl Lab, Div Appl Phys, Los Alamos, NM 87545 USA.
RP Rodriguez, G (reprint author), Los Alamos Natl Lab, Mat Phys & Applicat Div, Mail Stop K771,POB 1663, Los Alamos, NM 87545 USA.
EM rodrigeo@lanl.gov
RI Rodriguez, George/G-7571-2012;
OI Rodriguez, George/0000-0002-6044-9462; Schmitt, Mark/0000-0002-0197-9180
FU U.S. Army Armament Research, Development and Engineering Center (ARDEC);
Los Alamos National Laboratory [DE-AC52-06NA25396]
FX This work is funded through a work for others contract for the U.S. Army
Armament Research, Development and Engineering Center (ARDEC) in
Picatinny, N.J. and in conjunction with Applied Energetics, Incorporated
in Tucson, Ariz. All work at Los Alamos National Laboratory is carried
out under the auspices of the Department of Energy contract
DE-AC52-06NA25396.
NR 32
TC 42
Z9 44
U1 0
U2 3
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 DEC
PY 2008
VL 25
IS 12
BP 1988
EP 1997
DI 10.1364/JOSAB.25.001988
PG 10
WC Optics
SC Optics
GA 389MC
UT WOS:000262096000025
ER
PT J
AU Kaneshita, E
Bishop, AR
AF Kaneshita, Eiji
Bishop, Alan R.
TI Pressure-Induced Phase Transition to a Novel Spin State in Striped
Nickelates
SO JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
LA English
DT Article
DE stripes; nickelate; pressure effect; local mode; phonon
ID 2-DIMENSIONAL HUBBARD-MODEL; CHARGE; MAGNETISM; ORDER
AB We analyze pressure effects on stripe states within a selfconsistent Hartree-Fock calculation for a model of a striped nickelates. The results show a transition induced by high pressure and predict possible new spin states. We describe characteristics in the phonon excitations at the predicted transition, based on a real-space random phase approximation.
C1 [Kaneshita, Eiji] Argonne Natl Lab, Argonne, IL 60439 USA.
[Bishop, Alan R.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Kaneshita, E (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
FU U.S. DOE, Office of Science, Office of Basic Energy Sciences
[DE-AC02-06CH11357]
FX We are grateful to Yang Ding for helping to estimate the critical
pressure, and to Maiko Kofu, Masanori Ichioka, and Michel van Veenendaal
for valuable discussions. This work was supported by the U.S. DOE,
Office of Science, Office of Basic Energy Sciences, under Contract No.
DE-AC02-06CH11357.
NR 21
TC 3
Z9 3
U1 0
U2 2
PU PHYSICAL SOC JAPAN
PI TOKYO
PA YUSHIMA URBAN BUILDING 5F, 2-31-22 YUSHIMA, BUNKYO-KU, TOKYO, 113-0034,
JAPAN
SN 0031-9015
J9 J PHYS SOC JPN
JI J. Phys. Soc. Jpn.
PD DEC
PY 2008
VL 77
IS 12
AR 123709
DI 10.1143/JPSJ.77.123709
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 388FD
UT WOS:000262004800011
ER
PT J
AU Petravic, J
Ribeiro, RM
Casimiro, DR
Mattapallil, JJ
Roederer, M
Shiver, JW
Davenport, MP
AF Petravic, Janka
Ribeiro, Ruy M.
Casimiro, Danilo R.
Mattapallil, Joseph J.
Roederer, Mario
Shiver, John W.
Davenport, Miles P.
TI Estimating the Impact of Vaccination on Acute Simian-Human
Immunodeficiency Virus/Simian Immunodeficiency Virus Infections
SO JOURNAL OF VIROLOGY
LA English
DT Article
ID T-CELL DEPLETION; VIRAL DYNAMICS; IN-VIVO; ANTIRETROVIRAL THERAPY; HIV-1
INFECTION; TYPE-1 INFECTION; REPLICATION; LIMITATIONS; TISSUES; DECAY
AB The dynamics of HIV infection have been studied in humans and in a variety of animal models. The standard model of infection has been used to estimate the basic reproductive ratio of the virus, calculated from the growth rate of virus in acute infection. This method has not been useful in studying the effects of vaccination, since, for the vaccines developed so far, early growth rates of virus do not differ between control and vaccinated animals. Here, we use the standard model of viral dynamics to derive the reproductive ratio from the peak viral load and nadir of target cell numbers in acute infection. We apply this method to data from studies of vaccination in SHIV and SIV infection and demonstrate that vaccination can reduce the reproductive ratio by 2.3- and 2-fold, respectively. This method allows the comparison of vaccination efficacies among different viral strains and animal models in vivo.
C1 [Petravic, Janka; Davenport, Miles P.] Univ New S Wales, Complex Syst Biol Grp, Ctr Vasc Res, Sydney, NSW 2052, Australia.
[Ribeiro, Ruy M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Casimiro, Danilo R.; Shiver, John W.] Merck Res Labs, West Point, PA USA.
[Mattapallil, Joseph J.] Uniformed Serv Univ Hlth Sci, Dept Microbiol & Immunol, Bethesda, MD 20824 USA.
[Roederer, Mario] NIAID, ImmunoTechnol Sect, NIH, Bethesda, MD 20892 USA.
RP Davenport, MP (reprint author), Univ New S Wales, Complex Syst Biol Grp, Ctr Vasc Res, Sydney, NSW 2052, Australia.
EM m.davenport@unsw.edu.au
OI Ribeiro, Ruy/0000-0002-3988-8241
FU James S. McDonnell Foundation; Australian National Health and Medical
Research Council; Charles Viertel Senior Medical Research; National
Institutes of Health [P20-RR18754]
FX This work was supported by the James S. McDonnell Foundation 21st
Century Research Award/Studying Complex Systems and the Australian
National Health and Medical Research Council. M. P. D. is a Sylvia and
Charles Viertel Senior Medical Research Fellow. R. M. R. was supported
by grant P20-RR18754 from the National Institutes of Health.
NR 32
TC 8
Z9 8
U1 0
U2 0
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 DEC
PY 2008
VL 82
IS 23
BP 11589
EP 11598
DI 10.1128/JVI.01596-08
PG 10
WC Virology
SC Virology
GA 370UX
UT WOS:000260789700011
PM 18799584
ER
PT J
AU Ganusov, VV
De Boer, RJ
AF Ganusov, Vitaly V.
De Boer, Rob J.
TI Estimating In Vivo Death Rates of Targets due to CD8 T-Cell-Mediated
Killing
SO JOURNAL OF VIROLOGY
LA English
DT Article
ID VIRUS-SPECIFIC EFFECTOR; TOXIC LYMPHOCYTE-T; IMMUNODEFICIENCY-VIRUS;
IMMUNE-RESPONSE; VIRAL-INFECTION; DENDRITIC CELLS; CYTO-TOXICITY;
CUTTING EDGE; MEMORY; NAIVE
AB Despite recent advances in immunology, several key parameters determining virus dynamics in infected hosts remain largely unknown. For example, the rate at which specific effector and memory CD8 T cells clear virus-infected cells in vivo is hardly known for any viral infection. We propose a framework to quantify T-cell-mediated killing of infected or peptide-pulsed target cells using the widely used in vivo cytotoxicity assay. We have reanalyzed recently published data on killing of peptide-pulsed splenocytes by cytotoxic T lymphocytes and memory CD8 T cells specific to NP396 and GP276 epitopes of lymphocytic choriomeningitis virus (LCMV) in the mouse spleen. Because there are so many effector CD8 T cells in spleens of mice at the peak of the immune response, NP396-and GP276-pulsed targets are estimated to have very short half-lives of 2 and 14 min, respectively. After the effector numbers have diminished, i.e., in LCMV-immune mice, the half-lives become 48 min and 2.8 h for NP396-and GP276-expressing targets, respectively. Analysis of several alternative models demonstrates that the estimates of half-life times of peptide-pulsed targets are not affected when changes are made in the model assumptions. Our report provides a unifying framework to compare killing efficacies of CD8 T-cell responses specific to different viral and bacterial infections in vivo, which may be used to compare efficacies of various cytotoxic-T-lymphocyte-based vaccines.
C1 [Ganusov, Vitaly V.; De Boer, Rob J.] Univ Utrecht, NL-3584 CH Utrecht, Netherlands.
[Ganusov, Vitaly V.] Russian Acad Sci, Inst Biophys, Siberian Branch, Akademgorodok 660036, Russia.
[Ganusov, Vitaly V.] Russian Acad Sci, Krasnoyarsk Sci Ctr, Siberian Branch, Akademgorodok 660036, Russia.
RP Ganusov, VV (reprint author), Los Alamos Natl Lab, T-10 MS-K710, Los Alamos, NM 87545 USA.
EM vitaly.ganusov@gmail.com
RI De Boer, Rob/B-6050-2011;
OI De Boer, Rob/0000-0002-2130-691X; Ganusov, Vitaly/0000-0001-6572-1691
FU NWO [016.048.603]; Marie Curie Incoming International Fellowship (FP6)
FX We thank Joost Beltman, Kalet Leon, John Wherry, Dan Barber, Gennady
Bocharov, Roland Regoes, Andrew Yates, and several reviewers for
comments and suggestions during this work.; This work was supported by
VICI grant 016.048.603 from NWO and a Marie Curie Incoming International
Fellowship (FP6).
NR 53
TC 29
Z9 29
U1 0
U2 4
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 DEC
PY 2008
VL 82
IS 23
BP 11749
EP 11757
DI 10.1128/JVI.01128-08
PG 9
WC Virology
SC Virology
GA 370UX
UT WOS:000260789700026
PM 18815293
ER
PT J
AU Haack, JR
Hauck, CD
AF Haack, Jeffrey R.
Hauck, Cory D.
TI OSCILLATORY BEHAVIOR OF ASYMPTOTIC-PRESERVING SPLITTING METHODS FOR A
LINEAR MODEL OF DIFFUSIVE RELAXATION
SO KINETIC AND RELATED MODELS
LA English
DT Article
DE Asymptotic-preserving scheme; hyperbolic heat equation; splitting;
diffusive relaxation
ID RUNGE-KUTTA SCHEMES; HYPERBOLIC SYSTEMS; KINETIC-EQUATIONS;
RADIATIVE-TRANSFER; NUMERICAL SCHEMES; EDDINGTON FACTORS; REGIMES; LIMIT
AB The occurrence of oscillations in a well-known asymptotic preserving (AP) numerical scheme is investigated in the context of a linear model of diffusive relaxation, known as the P1 equations. The scheme is derived with operator splitting methods that separate the P1 system into slow and fast dynamics. A careful analysis of the scheme shows that binary oscillations can occur as a result of a black-red diffusion stencil and that dispersive-type oscillations may occur when there is too little numerical dissipation. The latter conclusion is based on comparison with a modified form of the P1 system. Numerical fixes a real so introduced to remove the oscillatory behavior.
C1 [Haack, Jeffrey R.] Univ Wisconsin, Dept Math, Madison, WI 53706 USA.
[Hauck, Cory D.] Los Alamos Natl Lab, Computat Phys Grp CCS 2, Los Alamos, NM 87544 USA.
[Hauck, Cory D.] Los Alamos Natl Lab, Ctr Nonlinear Studies T CNLS, Los Alamos, NM 87544 USA.
RP Haack, JR (reprint author), Univ Wisconsin, Dept Math, 480 Lincoln Dr, Madison, WI 53706 USA.
EM haack@math.wisc.edu; cdhauck@lanl.gov
NR 41
TC 3
Z9 3
U1 0
U2 2
PU AMER INST MATHEMATICAL SCIENCES-AIMS
PI SPRINGFIELD
PA PO BOX 2604, SPRINGFIELD, MO 65801-2604 USA
SN 1937-5093
EI 1937-5077
J9 KINET RELAT MOD
JI Kinet. Relat. Mod.
PD DEC
PY 2008
VL 1
IS 4
BP 573
EP 590
DI 10.3934/krm.2008.1.573
PG 18
WC Mathematics, Applied; Mathematics
SC Mathematics
GA 483IO
UT WOS:000268957800005
ER
PT J
AU Renk, TJ
Mann, GA
Torres, GA
AF Renk, T. J.
Mann, G. A.
Torres, G. A.
TI Performance of a pulsed ion beam with a renewable cryogenically cooled
ion source
SO LASER AND PARTICLE BEAMS
LA English
DT Article
DE CH(4) ion beams; Closed-cycle He cooling; Cryogenic anode; Kr beams; Xe
beams
ID LIQUID-HELIUM; ACCELERATION; DIODE; ANODE
AB For operation of all ion Source in an intense ion beam diode, it is desirable to form it localized and robust source of high purity. A cryogenically operated ion Source has great promise, since the ions are formed from a condensed high-purity gas, which has been confined to a relatively thin ice layer oil the anode surface. Previous experiments have established the principles of operation of such an ion Source, but have been limited in repetitive duration clue to the use of short-lived liquid Fie cooling of the anode surface. We detail here the successful development of a "Cryo-Diode" in which the cooling was achieved with a closed-cycle cryo-pump. This results in an ion source design that can potentially be operated for an indefinite duration. Time-of-flight measurements with Faraday cups indicate that the resultant ion be, is of high-purity, and composed of singly charged ions formed Out of the gas frozen out oil the anode surface.
C1 [Renk, T. J.; Mann, G. A.; Torres, G. A.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Renk, TJ (reprint author), Sandia Natl Labs, MS 1182,POB 5800, Albuquerque, NM 87185 USA.
EM tjrenk@sandia.gov
FU United States Department of Energy [DE-AC04-94AL85000]
FX Sandia National Laboratories is a multi-program laboratory operated by
Sandia Corporation, a Lockheed Martin Company, for the United States
Department of Energy under contract DE-AC04-94AL85000. We also
acknowledge conversations with Prof. Koichi Kasuya concerning his prior
cryogenic mode experiments at the Tokyo Institute of Technology, and
with Prof. Michael Thompson of Cornell University concerning the use of
ail in-situ cryopump for anode cooling.
NR 19
TC 8
Z9 8
U1 2
U2 3
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0263-0346
J9 LASER PART BEAMS
JI Laser Part. Beams
PD DEC
PY 2008
VL 26
IS 4
BP 545
EP 554
DI 10.1017/S026303460800058X
PG 10
WC Physics, Applied
SC Physics
GA 388OI
UT WOS:000262028700006
ER
PT J
AU Ni, PA
Kulish, MI
Mintsev, V
Nikolaev, DN
Ternovoi, VY
Hoffmann, DHH
Udrea, S
Hug, A
Tahir, NA
Varentsov, D
AF Ni, P. A.
Kulish, M. I.
Mintsev, V.
Nikolaev, D. N.
Ternovoi, V. Ya.
Hoffmann, D. H. H.
Udrea, S.
Hug, A.
Tahir, N. A.
Varentsov, D.
TI Temperature measurement of warm-dense-matter generated by intense
heavy-ion beams
SO LASER AND PARTICLE BEAMS
LA English
DT Article
DE High energy density physics; Temperature diagnostic; Warm dense matter
ID HIGH-ENERGY; GSI-DARMSTADT; LASER-BEAMS; FACILITY; PHYSICS; FUSION;
METALLIZATION; EQUATION; HYDROGEN; STATES
AB This paper describes a fast multi-channel radiation pyrometer that was developed for warm dense-matter experiments with intense heavy ion beams at the Gesellschaft fur Schwerionenforschung mbH (GSI). The pyrometer is capable of measuring brightness temperatures from 2000 K to 50,000 K. at six wavelengths in the visible and near-infrared parts of the spectrum, with 5 ns temporal resolution, and several micrometers spatial resolution. The pyrometer's spectral discrimination technique is based on interference filters, which also act as mirrors to allow for simultaneous spectral discrimination of the same ray at multiple wavelengths.
C1 [Ni, P. A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Kulish, M. I.; Mintsev, V.; Nikolaev, D. N.; Ternovoi, V. Ya.] Inst Problems Chem Phys, Chernogolovka, Russia.
[Hoffmann, D. H. H.; Udrea, S.] Tech Univ Darmstadt, Inst Kernphys, Darmstadt, Germany.
[Hug, A.; Tahir, N. A.; Varentsov, D.] Gesell Schwerionenforsch mbH, D-6100 Darmstadt, Germany.
RP Ni, PA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
EM pani@lbl.gov
RI Hoffmann, Dieter H.H./A-5265-2008; Mintsev, Victor/L-2029-2013
FU GSI-FNTAS [03-54-4254]
FX The authors wish to thank D. Fernengel, J. Menzel, and H. Wahl for their
help in preparing the experiments. This work has been supported in part
by the GSI-FNTAS grants 03-54-4254.
NR 32
TC 13
Z9 13
U1 2
U2 11
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0263-0346
J9 LASER PART BEAMS
JI Laser Part. Beams
PD DEC
PY 2008
VL 26
IS 4
BP 583
EP 589
DI 10.1017/S0263034608000645
PG 7
WC Physics, Applied
SC Physics
GA 388OI
UT WOS:000262028700010
ER
PT J
AU Priebe, G
Laundy, D
MacDonald, MA
Diakun, GP
Jamison, SP
Jones, LB
Holder, DJ
Smith, SL
Phillips, PJ
Fell, BD
Sheehy, B
Naumova, N
Sokolov, IV
Ter-Avetisyan, S
Spohr, K
Krafft, GA
Rosenzweig, JB
Schramm, U
Gruner, F
Hirst, GJ
Collier, J
Chattopadhyay, S
Seddon, EA
AF Priebe, G.
Laundy, D.
MacDonald, M. A.
Diakun, G. P.
Jamison, S. P.
Jones, L. B.
Holder, D. J.
Smith, S. L.
Phillips, P. J.
Fell, B. D.
Sheehy, B.
Naumova, N.
Sokolov, I. V.
Ter-Avetisyan, S.
Spohr, K.
Krafft, G. A.
Rosenzweig, J. B.
Schramm, U.
Gruener, F.
Hirst, G. J.
Collier, J.
Chattopadhyay, S.
Seddon, E. A.
TI Inverse Compton backscattering source driven by the multi-10 TW laser
installed at Daresbury
SO LASER AND PARTICLE BEAMS
LA English
DT Article
DE ALICE; Compton scattering; Compton synchrotron radiation; Energy
recovery linac; ERLP; Laser Compton scattering; Laser synchrotron
radiation; Thomson scattering; Ultra-short X-ray pulses; X-ray source
ID FEMTOSECOND X-RAYS; DEGREES THOMSON SCATTERING; ENERGY RECOVERY LINAC;
TI-SAPPHIRE LASER; ELECTRON-BEAM; RELATIVISTIC ELECTRONS; GENERATION;
PULSES; LIGHT; DIFFRACTION
AB Inverse Compton scattering is a promising method to implement a high brightness, ultra-short, energy tunable X-ray source at accelerator facilities. We have developed ail inverse Compton backscattering X-ray source driven by the multi-10 TW laser installed at Daresbury. Hard X-rays, with spectral peaks ranging from 15 to 30 keV, depending oil the scattering geometry, will be generated through the interaction of laser pulses with electron bunches delivered by the energy recovery linac machine, initially known as energy recovery linac prototype and subsequently renamed accelerators and lasers in combined experiments. X-ray Pulses containing 9 x 107 photons per Pulse will be created from head-on Collisions, With a Pulse duration comparable to the incoming electron bunch length. For transverse collisions 8 x 10 6 photons per pulse will be generated, where the laser pulse transit time defines the X-ray Pulse duration. The peak spectral brightness is predicted to be similar to 10(21) photons/(s mm(2) mrad(2) 0.1% Delta lambda/lambda).
C1 [Priebe, G.; Laundy, D.; MacDonald, M. A.; Diakun, G. P.; Jones, L. B.; Holder, D. J.; Smith, S. L.; Fell, B. D.; Seddon, E. A.] STFC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England.
[Chattopadhyay, S.] Cockcroft Inst, Warrington, Cheshire, England.
[Phillips, P. J.] Univ Dundee, Div Elect Engn & Phys, Dundee, Scotland.
[Hirst, G. J.; Collier, J.] STFC, Rutherford Appleton Lab, Didcot, Oxon, England.
[Schramm, U.] Forschungszentrum Dresden Rossendorf, Dresden, Germany.
[Gruener, F.] Max Planck Inst Quantum Opt, Garching, Germany.
[Sheehy, B.] Sheehy Sci Consulting, Wading River, NY USA.
[Naumova, N.] Lab Opt Appl, Palaiseau, France.
[Ter-Avetisyan, S.] Queens Univ Belfast, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland.
[Sokolov, I. V.] Univ Michigan, Space Phys Res Lab, Ann Arbor, MI 48109 USA.
[Spohr, K.] Univ Paisley, Dept Elect Engn & Phys, Glasgow, Lanark, Scotland.
[Krafft, G. A.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA USA.
[Rosenzweig, J. B.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA USA.
RP Priebe, G (reprint author), STFC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England.
EM gerd.priebe@stfc.ac.uk
RI Schramm, Ulrich/C-9393-2012; Priebe, Gerd/C-6330-2008; Sokolov,
Igor/H-9860-2013; Gruner, Florian/M-1212-2016
OI Schramm, Ulrich/0000-0003-0390-7671; Priebe, Gerd/0000-0002-9880-8715;
Sokolov, Igor/0000-0002-6118-0469; Gruner, Florian/0000-0001-8382-9225
FU STFC; Northwest Development Agency, through the Northwest Science Fund
FX We would like to acknowledge the financial Support of STFC and the
Northwest Development Agency, through the Northwest Science Fund.
NR 83
TC 33
Z9 33
U1 3
U2 6
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0263-0346
EI 1469-803X
J9 LASER PART BEAMS
JI Laser Part. Beams
PD DEC
PY 2008
VL 26
IS 4
BP 649
EP 660
DI 10.1017/S0263034608000700
PG 12
WC Physics, Applied
SC Physics
GA 388OI
UT WOS:000262028700017
ER
PT J
AU Zawadzki, RJ
Cense, B
Jones, SM
Olivier, SS
Miller, DT
Werner, JS
AF Zawadzki, Robert J.
Cense, Barry
Jones, Steven M.
Olivier, Scot S.
Miller, Donald T.
Werner, John S.
TI Ultra-high-resolution optical coherence tomography gets adaptive-optic
'glasses'
SO LASER FOCUS WORLD
LA English
DT Article
AB Ultra-high-resolution OCT imaging that uses adaptive optics is improved with a new source and optics for clinical in vivo visibility of the human retina.
C1 [Zawadzki, Robert J.; Werner, John S.] Univ Calif Davis, Vis Sci Adv Retinal Imaging Lab VSRI, Sacramento, CA 95817 USA.
[Cense, Barry; Miller, Donald T.] Indiana Univ, Sch Optometry, Bloomington, IN 47405 USA.
[Jones, Steven M.; Olivier, Scot S.] Lawrence Livermore Natl Lab, Livermore, CA USA.
RP Zawadzki, RJ (reprint author), Univ Calif Davis, Vis Sci Adv Retinal Imaging Lab VSRI, 4860 Y Str,Suite 2400, Sacramento, CA 95817 USA.
EM rjzawadzki@ucdavis.edu
RI Zawadzki, Robert/E-7534-2011;
OI Zawadzki, Robert/0000-0002-9574-156X; Jones, Stephen/0000-0002-4965-4932
NR 7
TC 1
Z9 1
U1 0
U2 0
PU PENNWELL PUBL CO
PI NASHUA
PA 98 SPIT BROOK RD, NASHUA, NH 03062-2801 USA
SN 1043-8092
J9 LASER FOCUS WORLD
JI Laser Focus World
PD DEC
PY 2008
VL 44
IS 12
BP 55
EP +
PG 4
WC Optics
SC Optics
GA 384PL
UT WOS:000261756600022
ER
PT J
AU Becht, GA
Vaughey, JT
Britt, RL
Eagle, CT
Hwu, SJ
AF Becht, Gregory A.
Vaughey, John T.
Britt, Robin L.
Eagle, Cassandra T.
Hwu, Shiou-Jyh
TI Ion exchange and electrochemical evaluation of the microporous phosphate
Li(9)Fe(7)(PO(4))(10)
SO MATERIALS RESEARCH BULLETIN
LA English
DT Article
DE Inorganic compounds; Microporous Materials; Intercalation reactions;
Electrochemical measurements; Electrochemical properties
ID IRON-PHOSPHATE; ANODE MATERIAL; LITHIUM; BATTERIES; MOSSBAUER; LIFEPO4;
CELLS; LI
AB A new lithium iron(III) phosphate, Li(9)Fe(7)(PO(4))(10), has been synthesized and is currently under electrochemical evaluation as an anode material for rechargeable lithium-ion battery applications. The sample was prepared via the ion exchange reaction of Cs(5)K(4)Fe(7)(PO(4))(10) 1 in the 1 M LiNO(3) solution under hydrothermal conditions at 200 degrees C. The fully Li(+)-exchanged sample Li(9)Fe(7)(PO(4))(10) 2 cannot yet be synthesized by conventional high-temperature, solid-state methods. The parent compound 1 is a member of the Cs(9-x)K(x)Fe(7)(PO(4))(10) series that was previously isolated from a high-temperature (750 degrees C) reaction employing the eutectic CsCl/KCl molten salt. The polycrystalline solid 1 was first prepared in a stoichiometric reaction via conventional solid-state method then followed by ion exchange giving rise to 2. Both compounds adopt three-dimensional structures that consist of orthogonally interconnected channels where electropositive ions reside. It has been demonstrated that the Cs(9-x)K(x)Fe(7)(PO(4))(10) series possesses versatile ion exchange capabilities with all the monovalent alkali metal and silver cations due to its facile pathways for ion transport. I and 2 Were Subject to electrochemical analysis and preliminary results suggest that the latter can be considered as an anode material. Electrochemical results indicate that Li(9)Fe(7)(PO(4))(10) is reduced below 1 V (vs. Li) to most likely form a Fe(0)/Li(3)PO(4) composite material, which can Subsequently be cycled reversibly at relatively low potential. An initial capacity of 250 mAh/g was measured, which is equivalent to the insertion of thirteen Li atoms per Li(9+x)Fe(7)(PO(4))(10) (x= 13) during the charge/discharge process (Fe(2+) + 2e -> Fe(0)). Furthermore, 2 shows a lower reduction potential (0.9 V), by approximately 200 mV, and much better electrochemical reversibility than iron(III) phosphate, FePO(4), highlighting the value of improving the ionic conductivity of the sample. (c) 2008 Elsevier Ltd. All rights reserved.
C1 [Hwu, Shiou-Jyh] Clemson Univ, Dept Chem, Hunter Chem Labs 477, Clemson, SC 29634 USA.
[Vaughey, John T.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Britt, Robin L.; Eagle, Cassandra T.] Appalachian State Univ, Dept Chem, Boone, NC 28608 USA.
RP Hwu, SJ (reprint author), Clemson Univ, Dept Chem, Hunter Chem Labs 477, POB 340973, Clemson, SC 29634 USA.
EM shwu@clemson.edu
OI Vaughey, John/0000-0002-2556-6129
FU National Science Foundation (NSF) [DMR-0322905, 0706426]; Summer
Research Program in Solid State and Materials Chemistry [DMR-0303450];
SQUID [CHE-9101044]; X-ray diffractometer [CHE-9808165]
FX We gratefully acknowledge continued financial support from the National
Science Foundation (NSF) for this research (DMR-0322905, 0706426), as
well as the support for RLB and CTE (faculty) for the Summer Research
Program in Solid State and Materials Chemistry (DMR-0303450) and that
for the purchases of SQUID magnetometer (CHE-9101044) and X-ray
diffractometer (CHE-9808165).
NR 21
TC 4
Z9 4
U1 1
U2 9
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0025-5408
J9 MATER RES BULL
JI Mater. Res. Bull.
PD DEC 1
PY 2008
VL 43
IS 12
BP 3389
EP 3396
DI 10.1016/j.materresbull.2008.02.005
PG 8
WC Materials Science, Multidisciplinary
SC Materials Science
GA 378YU
UT WOS:000261361900025
ER
PT J
AU Kurella, AK
Hu, MZ
Dahotre, NB
AF Kurella, Anil K.
Hu, Michael Z.
Dahotre, Narendra B.
TI Effect of microstructural evolution on wettability of laser coated
calcium phosphate on titanium alloy
SO MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS
LA English
DT Article
DE Laser; Wettability; Biocompatibility; Calcium phosphate; Titanium alloy;
Biomaterial
ID COATINGS; HYDROXYAPATITE; BIOMATERIALS; CO2-LASER; ZIRCONIA
AB Surface engineering of synthetic implant materials provides an exciting opportunity to mimic natural biomaterials. Surface that are bioactive and textured at multi-scale have the potential for easier osseointegration. Ti alloy surfaces known for their biocompatibility are coated with bioactive calcium phosphate using a laser source at multiple processing speeds. The resulting surface has multi-scale morphology and multi-phase chemical nature. Faster processing speeds showed improved wettability to water along with higher degree of crystallinity in the phases present. Furthermore. decreased laser processing speeds induced formation of increased amount of glassy phases that are expected to provide increased biocompatibility. The combination of these opposing effects Suggested that optimum crystallinity leading to optimum wettability can be produced at intermediate speeds for improved biocompatibility. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Kurella, Anil K.; Dahotre, Narendra B.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Hu, Michael Z.] Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA.
[Dahotre, Narendra B.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Dahotre, NB (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM ndahotre@utk.edu
OI Hu, Michael/0000-0001-8461-9684
FU Division of Materials Science [KC 02 03 010]; Office of Science; U.S.
Department of Energy at Oak Ridge National Laboratory
[DE-AC05-00OR22725]
FX This work is partially supported by the Division of Materials Science
(KC 02 03 010), Office of Science, the U.S. Department of Energy at Oak
Ridge National Laboratory managed by UT-Battelle, LLC, for the U.S.
Department of Energy under contract DE-AC05-00OR22725.
NR 20
TC 8
Z9 8
U1 1
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0928-4931
J9 MAT SCI ENG C-BIO S
JI Mater. Sci. Eng. C-Biomimetic Supramol. Syst.
PD DEC 1
PY 2008
VL 28
IS 8
BP 1560
EP 1564
DI 10.1016/j.msec.2008.04.015
PG 5
WC Materials Science, Multidisciplinary
SC Materials Science
GA 385YD
UT WOS:000261848600054
ER
PT J
AU Samaras, M
Victoria, M
AF Samaras, M.
Victoria, M.
TI Modelling in nuclear energy environments
SO MATERIALS TODAY
LA English
DT Review
ID DISLOCATION DYNAMICS SIMULATIONS; MICROSTRUCTURE EVOLUTION;
STRUCTURAL-MATERIALS; NEUTRON-IRRADIATION; DEFECT PRODUCTION;
PLASTIC-FLOW; FE-CR; IRON; METALS; DIFFUSION
AB Producing energy to supply the demands of our societies is reaching a critical limit. To tackle this issue, there is a slow renaissance of fission reactors and the push to realise fusion reactors. The safe, reliable and optimal performance of fusion and fission plants is dependent on the choice of suitable materials used as components and fuels. As these materials are degraded by their exposure to high temperatures, irradiation and a corrosive environment, it is necessary to address the issue of long term degradation of materials under service exposure in advanced plants. A higher confidence in life-time assessments of these materials requires an understanding of the related physical phenomena on a range of scales from the atomic level of single defect energetics all the way up to macroscopic effects.
C1 [Samaras, M.; Victoria, M.] Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
[Victoria, M.] Lawrence Livermore Natl Lab, Livermore, CA 94557 USA.
[Victoria, M.] Univ Politecn Madrid, Madrid 28014, Spain.
RP Samaras, M (reprint author), Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
NR 99
TC 15
Z9 15
U1 4
U2 23
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1369-7021
J9 MATER TODAY
JI Mater. Today
PD DEC
PY 2008
VL 11
IS 12
BP 54
EP 62
DI 10.1016/S1369-7021(08)70253-0
PG 9
WC Materials Science, Multidisciplinary
SC Materials Science
GA 383VF
UT WOS:000261701600014
ER
PT J
AU Caboussat, A
Francois, MM
Glowinski, R
Kothe, DB
Sicilian, JM
AF Caboussat, A.
Francois, M. M.
Glowinski, R.
Kothe, D. B.
Sicilian, J. M.
TI A numerical method for interface reconstruction of triple points within
a volume tracking algorithm
SO MATHEMATICAL AND COMPUTER MODELLING
LA English
DT Article
DE Interface reconstruction; Triple-point configuration; Free surface;
Constrained optimization; Multiphase flows
ID OF-FLUID METHOD; FREE-SURFACE; POLYHEDRAL MESHES; POWER DIAGRAMS;
FINITE-ELEMENT; NEWTON METHODS; SIMULATION; ADVECTION; FLOWS;
COMPUTATIONS
AB A numerical method for the reconstruction of interfaces in finite volume schemes for multiphase flows is presented. The computation of the triple point at the intersection of three materials in two dimensions of space is addressed. The determination of the normal vectors between pairs of materials is obtained with a finite element approximation. A numerical method for the localization of a triple point is described as the minimum of a constrained minimization problem inside an interfacial cell of the discretization. For given volume fractions of materials in the cell, an interior-point/Newton method is used for the reconstruction of the local geometry and the localization of the triple point. Initialization of the Newton method is performed with a derivative-free algorithm. Numerical results are presented for static and pure advection cases to illustrate the efficiency and robustness of the algorithm. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Caboussat, A.; Glowinski, R.] Univ Houston, Dept Math, Houston, TX 77204 USA.
[Francois, M. M.; Sicilian, J. M.] Los Alamos Natl Lab, Comp Computat & Stat Sci Div, Los Alamos, NM 87545 USA.
[Kothe, D. B.] Oak Ridge Natl Lab, Natl Ctr Computat Sci, Oak Ridge, TN 37831 USA.
RP Caboussat, A (reprint author), Univ Houston, Dept Math, 4800 Calhoun Rd, Houston, TX 77204 USA.
EM caboussat@math.uh.edu; mmfran@lanl.gov; roland@math.uh.edu;
kothe@ornl.gov; sicilian@lanl.gov
RI Francois, Marianne/B-2423-2012;
OI Francois, Marianne/0000-0003-3062-6234
FU Los Alamos National Laboratory; Telluride project; University of
Houston; National Nuclear Security Administration of the US Department
of Energy [DE-AC52-06NA25396]; National Science Foundation [NSF-DMS
0412267]
FX The Los Alamos National Laboratory and the Telluride project are greatly
acknowledged for providing the TRUCHAS software and sponsoring the
visits of the first and third authors. The first author was partially
supported by University of Houston start-up funds. The second author was
supported by the Los Alamos National Laboratory. Operated by Los Alamos
National Security, LLC, for the National Nuclear Security Administration
of the US Department of Energy under contract DE-AC52-06NA25396. The
third author was partially supported by the National Science Foundation
NSF-DMS 0412267. The fifth author was supported by the Los Alamos
National Laboratory. Operated by Los Alamos National Security, LLC, for
the National Nuclear Security Administration of the US Department of
Energy under contract DE-AC52-06NA25396.
NR 37
TC 7
Z9 8
U1 0
U2 2
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0895-7177
J9 MATH COMPUT MODEL
JI Math. Comput. Model.
PD DEC
PY 2008
VL 48
IS 11-12
BP 1957
EP 1971
DI 10.1016/j.mcm.2008.05.009
PG 15
WC Computer Science, Interdisciplinary Applications; Computer Science,
Software Engineering; Mathematics, Applied
SC Computer Science; Mathematics
GA 370JE
UT WOS:000260757700029
ER
PT J
AU Massoudi, M
AF Massoudi, Mehrdad
TI Flow of a binary mixture of linearly incompressible viscous fluids
between two horizontal parallel plates
SO MECHANICS RESEARCH COMMUNICATIONS
LA English
DT Article
DE mixture theory; continuum mechanics; steady flow; exact solutions;
two-fluid theory; multiphase
ID NEWTONIAN FLUIDS; BOUNDARY-CONDITIONS; CONTINUUM THEORIES; DIFFUSION;
EQUATIONS; MODELS; PIPE
AB In this paper, we use the classical Mixture Theory and present exact solutions to the equations of motion for the steady flow of two linearly viscous fluids between two horizontal plates. We show that for a saturated mixture and under very special conditions, namely when the body forces are assumed negligible, the only interaction force is due to relative velocity (drag force), and if the two velocities are assumed to be related to each other in a linear fashion, then it is possible to integrate the coupled ordinary differential equations and obtain analytical expressions for the velocities and the volume fraction. Published by Elsevier Ltd.
C1 US DOE, NETL, Pittsburgh, PA 15236 USA.
RP Massoudi, M (reprint author), US DOE, NETL, POB 10940, Pittsburgh, PA 15236 USA.
EM MASSOUDI@NETLDOE.GOV
NR 35
TC 2
Z9 2
U1 0
U2 2
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0093-6413
J9 MECH RES COMMUN
JI Mech. Res. Commun.
PD DEC
PY 2008
VL 35
IS 8
BP 603
EP 608
DI 10.1016/j.mechrescom.2008.03.003
PG 6
WC Mechanics
SC Mechanics
GA 351IX
UT WOS:000259419100013
ER
PT J
AU Burkes, DE
Hallinan, NP
Shropshire, KL
Wells, PB
AF Burkes, Douglas E.
Hallinan, Neil P.
Shropshire, Karen L.
Wells, Peter B.
TI Effects of Applied Load on 6061-T6 Aluminum Joined Employing a Novel
Friction Bonding Process
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID STRAIN RATE SUPERPLASTICITY
AB Friction bonding is under consideration for use in mass production of plate-type nuclear fuels for research reactors. This article discusses the effects of applied load (the most important process parameter for fabrication of these fuels) on temperature distribution, microstructure, and mechanical properties. Friction bonding experiments showed that tool geometry caused temperature gradients across the tool surface. Temperatures at the joint interface suggested the advancing side of the tool produced a majority of the frictional heat, while the retreating side of the tool mainly forged the plasticized material while bonding increased with applied load. The microstructure across the tool surface was also altered and, as a function of applied load, affected the mechanical properties. The 6061 aluminum alloy had mechanical properties close to a T4 temper after processing. Results documented in this article will aid in continual enhancement of friction bonding for nuclear fuel plate fabrication, and will hopefully contribute to continued advancement of friction stir welding (FSW) state of the art.
C1 [Hallinan, Neil P.; Shropshire, Karen L.] Idaho Natl Lab, Nucl Fuels & Mat Div, Idaho Falls, ID 83415 USA.
[Shropshire, Karen L.] Idaho State Univ, Dept Nucl Engn, Pocatello, ID 83209 USA.
[Wells, Peter B.] Univ Idaho, Dept Mech Engn, Moscow, ID 83844 USA.
EM douglas.burkes@inl.gov
FU U.S. Department of Energy, Office of the National Nuclear Security
Administration (NNSA) [DE-AC07-05ID14517]
FX This work was supported by the U.S. Department of Energy, Office of the
National Nuclear Security Administration (NNSA), under DOE Idaho
Operations Office (ContractNo. DE-AC07-05ID14517). The authors are
especially grateful to the Fuels and Applied Sciences Building and
Electron Microscopy Laboratory Staff, and to Mrs. Terri Dixon, Mr.
Michael Chapple, and Dr. Jan-Fong Jue for their assistance with
materials and fabrication related to these experiments. The submitted
manuscript has been authored by a contractor of the U.S. Government (DOE
Contract No. DE-AC07-05ID14517). Accordingly, the U. S. Government
retains a nonexclusive, 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 19
TC 8
Z9 8
U1 1
U2 4
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 DEC
PY 2008
VL 39A
IS 12
BP 2852
EP 2861
DI 10.1007/s11661-008-9644-9
PG 10
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 365AK
UT WOS:000260378100007
ER
PT J
AU Wu, XP
Kalidindi, SR
Necker, C
Salem, AA
AF Wu, Xianping
Kalidindi, Surya R.
Necker, Carl
Salem, Ayman A.
TI Modeling Anisotropic Stress-Strain Response and Crystallographic Texture
Evolution in alpha-Titanium during Large Plastic Deformation using
Taylor-Type Models: Influence of Initial Texture and Purity
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID STACKING-FAULT ENERGY; CRYSTAL-PLASTICITY; FCC METALS; MICROSTRUCTURAL
EVOLUTION; HARDENING REGIMES; MAGNESIUM ALLOYS; POLYCRYSTALS;
COMPRESSION; TEMPERATURE; MECHANISMS
AB The anisotropic strain-hardening behavior and texture evolution during large plastic strains were investigated in two different grades of alpha-titanium. A recently proposed Taylor-type crystal-plasticity model([1]) was used to predict the crystallographic texture evolution and anisotropic stress-strain response of these materials during large plastic strains at ambient temperature. The reasonable agreement between the predictions and the measurements reported here demonstrates the potential of these models for a class of titanium alloys in which plastic deformation is accommodated by both crystallographic slip and deformation twinning. The results of this study also provided quantitative insights into the effects of purity level on the slip and twin-hardening parameters, which are also observed to be relatively insensitive to the initial texture in the sample.
C1 [Wu, Xianping] ExxonMobil Res & Engn Co, Annandale, NJ 08801 USA.
[Kalidindi, Surya R.] Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA.
[Necker, Carl] Los Alamos Natl Lab, Met Grp MST 6, Los Alamos, NM 87545 USA.
[Salem, Ayman A.] UES Inc, Mat Proc Lab, AFRL MLLM, Wright Patterson AFB, OH 45433 USA.
[Salem, Ayman A.] Universal Technol Corp, Dayton, OH 45431 USA.
[Wu, Xianping] Smith Technol, Houston, TX 77032 USA.
RP Wu, XP (reprint author), Smith Technol, Houston, TX 77032 USA.
EM skalidin@coe.drexel.edu
RI Kalidindi, Surya/A-1024-2007; Wagner, Martin/A-6880-2008
FU National Science Foundation [DMR-0201382]; Air Force [F33615-03-D-5801]
FX This work was performed while one of the authors (XW) was at Drexel
University, and it was financially supported by the National Science
Foundation under Grant No. DMR-0201382. The authors also thank Professor
R.D. Doherty from Drexel University for the discussions on various
aspects of this study. One of the authors (AAS) gratefully recognizes
the support received under the auspices of Air Force Contract No.
F33615-03-D-5801.
NR 33
TC 16
Z9 16
U1 3
U2 17
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 DEC
PY 2008
VL 39A
IS 12
BP 3046
EP 3054
DI 10.1007/s11661-008-9651-x
PG 9
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 365AK
UT WOS:000260378100027
ER
PT J
AU Barabash, R
Wang, YD
Liaw, PK
AF Barabash, Rozaliya I.
Wang, Yandong
Liaw, Peter K.
TI Neutron and X-Ray Studies for Probing Materials Behavior
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.
[Wang, Yandong] Northeastern Univ, Shenyang 110004, Peoples R China.
[Liaw, Peter K.] Univ Tennessee, Knoxville, TN 37996 USA.
RP Barabash, R (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM ydwang@mail.neu.edu.cn
RI wang, yandong/G-9404-2013
NR 0
TC 1
Z9 1
U1 0
U2 0
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 DEC
PY 2008
VL 39A
IS 13
BP 3057
EP 3057
DI 10.1007/s11661-008-9681-4
PG 1
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 371NT
UT WOS:000260838700001
ER
PT J
AU Ice, G
AF Ice, Gene E.
TI The Future of Spatially-Resolved Polychromatic Neutron and X-Ray
Microdiffraction
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Neutron and X-Ray Studies for Probing Materials Behavior
held at the 137th TMS Annual Meeting and Exhibition
CY MAR 09-SEP 13, 2008
CL New Orleans, LA
SP TMS
ID PLASTIC-DEFORMATION; STRUCTURAL MICROSCOPY; CRYSTAL MICROSCOPE;
ELECTROMIGRATION; OPTICS; INTERCONNECT; RESOLUTION; MIRRORS; STRAIN;
FILMS
AB Polychromatic microdiffraction is an emerging materials-characterization tool made practical by powerful X-ray and neutron sources, and by advanced optics and software. With polychromatic techniques, local crystalline properties including phase, texture (orientation), elastic strain, and defect density can be mapped with submicron spatial resolution in three dimensions. Here, we describe the evolving ability to nondestructively map local crystal structure in three dimensions and discuss how future advances will help address long-standing issues of inhomogeneous grain growth, deformation, fracture, and elastic strain. Current and future applications impact virtually all materials including electronic, solar, and light-emitting-diode (LED) materials, nanomaterials, structural materials, and joining materials. In addition, the ability to focus small beams on small samples dramatically increases signal-to-noise and greatly reduces the cost for extreme environmental chambers required for high-pressure, high-temperature, high-magnetic field or corrosive environments. Polychromatic techniques efficiently use source brilliance and minimize the required sample volume, which is essential for hard-to-make materials, irreplaceable materials, and for radioactive, toxic, or otherwise dangerous materials. New polychromatic neutron capabilities will significantly extend the range of samples that can be studied with neutrons and presents important new scientific opportunities for studies of magnetic materials, low Z elements, fragile crystal structures, and small samples in extreme environments.
C1 Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Ice, G (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
EM IceGE@ornl.gov
NR 35
TC 14
Z9 14
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 DEC
PY 2008
VL 39A
IS 13
BP 3058
EP 3064
DI 10.1007/s11661-008-9570-x
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 371NT
UT WOS:000260838700002
ER
PT J
AU Huang, EW
Barabash, R
Jia, N
Wang, YD
Ice, G
Clausen, B
Horton, J
Liaw, PK
AF Huang, E-Wen
Barabash, Rozaliya
Jia, Nan
Wang, Yan-Dong
Ice, Gene E.
Clausen, Bjorn
Horton, J.
Liaw, Peter K.
TI Slip-System-Related Dislocation Study from In-Situ Neutron Measurements
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Neutron and X-Ray Studies for Probing Materials Behavior
held at the 137th TMS Annual Meeting and Exhibition
CY MAR 09-SEP 13, 2008
CL New Orleans, LA
SP TMS
ID RANGE INTERNAL-STRESSES; X-RAY-DIFFRACTION; PLASTIC-DEFORMATION;
STAINLESS-STEEL; INTERGRANULAR STRAINS; TEXTURE COMPONENTS;
GRAIN-ORIENTATION; DEFORMED-CRYSTALS; METALS; POLYCRYSTALS
AB A combined experimental/computational approach is employed to study slip-system-related dislocation-substructure formation during uniaxial tension of a single-phase, face-centered-cubic (fcc), nickel-based alloy. In-situ neutron-diffraction measurements were conducted to monitor the peak-intensity, peak-position, and peak-broadening evolution during a displacement-controlled, monotonic-tension experiment at room temperature. The measured lattice-strain evolution and the macrostress/macrostrain curves were used to obtain the material parameters required for simulating the texture development by a visco-plastic self-consistent (VPSC) model. The simulated texture compared favorably with experimentally-determined texture results over a range of 0 to 30 pct engineering strain. The grain-orientation-dependent input into the Debye-intensity ring was considered. Grains favorably oriented relative to the two detector banks in the geometry of the neutron experiment were indicated. For the favorably oriented grains, the simulated slip-system activity was used to calculate the slip-system-dependent, dislocation-contrast factor. The combination of the calculated contrast factor with the experimentally-measured peak broadening allows the assessment of the parameters of the dislocation arrangement within the specifically oriented grains, which has a quantitative agreement with the transmission-electron-microscopy results.
C1 [Huang, E-Wen; Liaw, Peter K.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Horton, J.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Alloying Behavior & Design Grp, Oak Ridge, TN 37831 USA.
[Barabash, Rozaliya] Univ Tennessee, Ctr Mat Proc, Knoxville, TN 37996 USA.
[Jia, Nan; Wang, Yan-Dong] Northeastern Univ, Minist Educ, Key Lab Anisotropy & Texture Mat, Shenyang 110004, Peoples R China.
[Wang, Yan-Dong] Univ Tennessee, Dept Mat Sci & Technol, Knoxville, TN 37996 USA.
[Clausen, Bjorn] Los Alamos Natl Lab, Los Alamos Neutron Sci Ctr, Los Alamos, NM 87545 USA.
RP Huang, EW (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM barabashr@ornl.gov
RI Clausen, Bjorn/B-3618-2015; Huang, E-Wen/A-7509-2009; wang,
yandong/G-9404-2013; Huang, E-Wen/A-5717-2015
OI Clausen, Bjorn/0000-0003-3906-846X; Huang, E-Wen/0000-0003-4986-0661
NR 53
TC 16
Z9 16
U1 0
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 DEC
PY 2008
VL 39A
IS 13
BP 3079
EP 3088
DI 10.1007/s11661-008-9704-1
PG 10
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 371NT
UT WOS:000260838700005
ER
PT J
AU Choi, KS
Liu, WN
Sun, X
Khaleel, MA
Ren, Y
Wang, YD
AF Choi, K. S.
Liu, W. N.
Sun, X.
Khaleel, M. A.
Ren, Y.
Wang, Y. D.
TI Advanced Micromechanical Model for Transformation-Induced Plasticity
Steels with Application of In-Situ High-Energy X-Ray Diffraction Method
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Neutron and X-Ray Studies for Probing Materials Behavior
held at the 137th TMS Annual Meeting and Exhibition
CY MAR 09-SEP 13, 2008
CL New Orleans, LA
SP TMS
ID MARTENSITIC-TRANSFORMATION; DEFORMATION-BEHAVIOR; GRAIN-ORIENTATION;
MULTIPHASE STEELS; TRIP STEELS; PHASE
AB Compared to other advanced high-strength steels, transformation-induced plasticity (TRIP) steels exhibit better ductility at a given strength level and can be used to produce complicated automotive parts. This enhanced formability comes from the transformation of retained austenite to martensite during plastic deformation. In this study, as a first step in predicting optimum processing parameters in TRIP steel productions, a micromechanical finite element model is developed based on the actual microstructure of a TRIP 800 steel. The method uses a microstructure-based representative volume element (RVE) to capture the complex deformation behavior of TRIP steels. The mechanical properties of the constituent phases of the TRIP 800 steel and the fitting parameters describing the martensite transformation kinetics are determined using the synchrotron-based in-situ high-energy X-ray diffraction (HEXRD) experiments performed under a uniaxial tensile deformation. The experimental results suggest that the HEXRD technique provides a powerful tool for characterizing the phase transformation behavior and the microstress developed due to the phase-to-phase interaction of TRIP steels during deformation. The computational results suggest that the response of the RVE well represents the overall macroscopic behavior of the TRIP 800 steel under deformation. The methodology described in this study may be extended for studying the effects of the various processing parameters on the macroscopic behaviors of TRIP steels.
C1 [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, Key Lab Anisotropy & Texture Mat MOE, Shenyang 110004, Peoples R China.
RP Choi, KS (reprint author), Pacific NW Natl Lab, Computat Sci & Math Div, Richland, WA 99352 USA.
EM kyoosil.choi@pnl.gov
RI wang, yandong/G-9404-2013;
OI khaleel, mohammad/0000-0001-7048-0749
NR 21
TC 25
Z9 26
U1 3
U2 15
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 DEC
PY 2008
VL 39A
IS 13
BP 3089
EP 3096
DI 10.1007/s11661-008-9649-4
PG 8
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 371NT
UT WOS:000260838700006
ER
PT J
AU Cheng, S
Wang, XL
Feng, ZL
Clausen, B
Choo, H
Liaw, PK
AF Cheng, Sheng
Wang, Xun-Li
Feng, Zhili
Clausen, Bjorn
Choo, Hahn
Liaw, Peter K.
TI Probing the Characteristic Deformation Behaviors of
Transformation-Induced Plasticity Steels
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Neutron and X-Ray Studies for Probing Materials Behavior
held at the 137th TMS Annual Meeting and Exhibition
CY MAR 09-SEP 13, 2008
CL New Orleans, LA
SP TMS
ID SITU NEUTRON-DIFFRACTION; ASSISTED MULTIPHASE STEELS; RETAINED
AUSTENITE; MECHANICAL-PROPERTIES; PHASE-TRANSFORMATION; SUPERELASTIC
NITI; TRIP STEELS; STRESS; STABILITY; MICROSTRUCTURE
AB The characteristic micromechanical behaviors of contrasting transformation-induced plasticity (TRIP) steels were investigated under tensile loading by in-situ neutron diffraction and transmission electron microscopy in detail. As demonstrated by the lattice strain development from the neutron diffraction, in the TRIP steel with -10 pct RA, microyielding of soft ferrite was responsible for the first stress partition, but a second stress sharing was caused by effective martensitic transformation. In the TRIP steel with less than 5 pct RA, where the contribution from the martensitic transformation was minor, stress partition took place virtually between the ferrite and bainite phase. Probing with systematic transmission electron microscopy (TEM) observations, we pin down the inherent correlation between the microstructural evolutions and the stress partition mechanism. Based on the experimental observations, the factors influencing the work-hardening behavior of TRIP steels are discussed.
C1 [Cheng, Sheng; Choo, Hahn; Liaw, Peter K.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Wang, Xun-Li] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN USA.
[Feng, Zhili] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN USA.
[Clausen, Bjorn] Los Alamos Natl Lab, Los Alamos Neutron Sci Ctr, Los Alamos, NM 87545 USA.
RP Cheng, S (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM scheng1@utk.edu
RI Wang, Xun-Li/C-9636-2010; Choo, Hahn/A-5494-2009; Feng,
Zhili/H-9382-2012; Clausen, Bjorn/B-3618-2015
OI Wang, Xun-Li/0000-0003-4060-8777; Choo, Hahn/0000-0002-8006-8907; Feng,
Zhili/0000-0001-6573-7933; Clausen, Bjorn/0000-0003-3906-846X
NR 34
TC 21
Z9 21
U1 1
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 DEC
PY 2008
VL 39A
IS 13
BP 3105
EP 3112
DI 10.1007/s11661-008-9604-4
PG 8
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 371NT
UT WOS:000260838700008
ER
PT J
AU Nie, ZH
Wang, YD
Wang, GY
Richardson, JW
Wang, G
Liu, YD
Liaw, PK
Zuo, L
AF Nie, Z. H.
Wang, Y. D.
Wang, G. Y.
Richardson, J. W.
Wang, G.
Liu, Y. D.
Liaw, P. K.
Zuo, L.
TI Phase Transition and Texture Evolution in the Ni-Mn-Ga Ferromagnetic
Shape-Memory Alloys Studied by a Neutron Diffraction Technique
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Neutron and X-Ray Studies for Probing Materials Behavior
held at the 137th TMS Annual Meeting and Exhibition
CY MAR 09-SEP 13, 2008
CL New Orleans, LA
SP TMS
ID FIELD-INDUCED STRAIN; CRYSTAL-STRUCTURES
AB The phase transition and influence of the applied stress on the texture evolution in the as-cast Ni-Mn-Ga ferromagnetic shape-memory alloys were studied by the time-of-flight (TOF) neutron diffraction technique. The neutron diffraction experiments were performed on the General Purpose Powder Diffractometer (Argonne National Laboratory). Inverse pole figures were determined from the neutron data for characterizing the orientation distributions and variant selections of polycrystalline Ni-Mn-Ga alloys subjected to different uniaxial compression deformations. Texture analyses reveal that the initial texture for the parent phase in the as-cast specimen was composed of was observed in the transformed martensite after a compression stress applied on the parent phase along the cyclindrical axis of the specimens. The preferred selection of variants can be well explained by considering the grain/variant-orientation-dependent Bain-distortion energy.
C1 [Nie, Z. H.; Wang, Y. D.; Wang, G. Y.; Liu, Y. D.; Zuo, L.] Northeastern Univ, Key Lab Anisotropy & Texture Mat MOE, Shenyang 110004, Peoples R China.
[Wang, G. Y.; Liaw, P. K.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Richardson, J. W.] Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA.
RP Nie, ZH (reprint author), Northeastern Univ, Key Lab Anisotropy & Texture Mat MOE, Shenyang 110004, Peoples R China.
EM ydwang@mail.neu.edu.cn
RI Wang, Gongyao/C-4003-2011; Nie, Zhihua/G-9459-2013; wang,
yandong/G-9404-2013
OI Nie, Zhihua/0000-0002-2533-933X;
NR 19
TC 5
Z9 5
U1 1
U2 3
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 DEC
PY 2008
VL 39A
IS 13
BP 3113
EP 3119
DI 10.1007/s11661-008-9600-8
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 371NT
UT WOS:000260838700009
ER
PT J
AU Jia, N
Peng, RL
Brown, DW
Clausen, B
Wang, YD
AF Jia, N.
Peng, R. Lin
Brown, D. W.
Clausen, B.
Wang, Y. D.
TI Tensile Deformation Behavior of Duplex Stainless Steel Studied by
In-Situ Time-of-Flight Neutron Diffraction
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Neutron and X-Ray Studies for Probing Materials Behavior
held at the 137th TMS Annual Meeting and Exhibition
CY MAR 09-SEP 13, 2008
CL New Orleans, LA
SP TMS
ID SELF-CONSISTENT MODEL; RESIDUAL-STRESSES
AB For a duplex alloy being subjected to deformation, the different mechanical behaviors of its constituent phases may lead to a nonuniform partition of stresses between phases. In addition, the grain-orientation-dependent elastic/plastic anisotropy in each phase may cause grain-to-grain interactions, which further modify the microscopic load partitioning between phases. In the current work, neutron diffraction experiments on the spectrometer for materials research at temperature and stress (SMARTS) were performed on an austenite-ferrite stainless steel for tracing the evolution of various microstresses during tensile loading, with particular emphasis on the load sharing among grains with different crystallographic orientations. The anisotropic elastic/plastic properties of the duplex steel were simulated using a visco-plastic self-consistent (VPSC) model that can predict the phase stress and the grain-orientation-dependent stress. Material parameters used for describing the constitutive laws of each phase were determined from the measured lattice strain distributions for different diffraction {hkl} planes as well as the laboratorial macroscopic stress-strain curve of the duplex steel. The present investigations provide in-depth understanding of the anisotropic micromechanical behavior of the duplex steel during tensile deformation.
C1 [Jia, N.; Wang, Y. D.] Northeastern Univ, Minist Educ, Key Lab Anisotropy & Texture Mat, Shenyang 110004, Peoples R China.
[Peng, R. Lin] Linkoping Univ, Dept Mech Engn, S-58183 Linkoping, Sweden.
[Brown, D. W.; Clausen, B.] Los Alamos Natl Lab, Los Alamos Neutron Scattering Ctr, Los Alamos, NM 87545 USA.
RP Jia, N (reprint author), Northeastern Univ, Minist Educ, Key Lab Anisotropy & Texture Mat, Shenyang 110004, Peoples R China.
EM nanjia_neu@yahoo.com.cn
RI wang, yandong/G-9404-2013; Clausen, Bjorn/B-3618-2015
OI Clausen, Bjorn/0000-0003-3906-846X
NR 25
TC 22
Z9 22
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 DEC
PY 2008
VL 39A
IS 13
BP 3134
EP 3140
DI 10.1007/s11661-008-9675-2
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 371NT
UT WOS:000260838700011
ER
PT J
AU Pratt, P
Felicelli, SD
Wang, L
Hubbard, CR
AF Pratt, P.
Felicelli, S. D.
Wang, L.
Hubbard, C. R.
TI Residual Stress Measurement of Laser-Engineered Net Shaping AISI 410
Thin Plates Using Neutron Diffraction
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Neutron and X-Ray Studies for Probing Materials Behavior
held at the 137th TMS Annual Meeting and Exhibition
CY MAR 09-SEP 13, 2008
CL New Orleans, LA
SP TMS
ID DEPOSITION; CONSTANTS
AB In an attempt to relate the laser-engineered net shaping (LENS) process parameters, laser power and laser travel speed, to the quality of LENS-produced parts, strain measurements were taken at several predetermined points within seven LENS AISI 410 thin plates using the neutron diffraction method. The residual stresses at these points were then calculated using the measured strain values to ascertain how the internal stress varies as a function of the input parameters and location. It is found that the component of the stress in the vertical direction (i.e., perpendicular to the raster direction of the laser/powder nozzle) is dominant, in agreement with previous reports, and relatively insensitive to variations in process parameters. This was confirmed with numerical simulations performed with a thermomechanical model developed using the commercial program SYSWELD. The simulations also showed a good qualitative agreement with the measured simulated stresses.
C1 [Pratt, P.; Felicelli, S. D.] Mississippi State Univ, Dept Mech Engn, Mississippi State, MS 39762 USA.
[Felicelli, S. D.; Wang, L.] Mississippi State Univ, Ctr Adv Vehicular Syst, Mississippi State, MS 39762 USA.
[Hubbard, C. R.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Pratt, P (reprint author), Mississippi State Univ, Dept Mech Engn, Mississippi State, MS 39762 USA.
EM felicelli@me.msstate.edu
RI Wang, Liang/A-8116-2010
NR 16
TC 16
Z9 16
U1 3
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 DEC
PY 2008
VL 39A
IS 13
BP 3155
EP 3163
DI 10.1007/s11661-008-9660-9
PG 9
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 371NT
UT WOS:000260838700014
ER
PT J
AU Lee, SY
Barabash, RI
Chung, JS
Liaw, PK
Choo, H
Sun, Y
Fan, C
Li, L
Brown, DW
Ice, GE
AF Lee, S. Y.
Barabash, R. I.
Chung, J. -S.
Liaw, P. K.
Choo, H.
Sun, Y.
Fan, C.
Li, L.
Brown, D. W.
Ice, G. E.
TI Neutron and X-ray Microbeam Diffraction Studies around a Fatigue-Crack
Tip after Overload
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Neutron and X-Ray Studies for Probing Materials Behavior
held at the 137th TMS Annual Meeting and Exhibition
CY MAR 09-SEP 13, 2008
CL New Orleans, LA
SP TMS
ID CLOSURE; BEHAVIOR; MICRODIFFRACTION; CRYSTALS; ALLOY
AB An in-situ neutron diffraction technique was used to investigate the lattice-strain distributions and plastic deformation around a crack tip after overload. The lattice-strain profiles around a crack tip were measured as a function of the applied load during the tensile loading cycles after overload. Dislocation densities calculated from the diffraction peak broadening were presented as a function of the distance from the crack tip. Furthermore, the crystallographic orientation variations were examined near a crack tip using polychromatic X-ray microdiffraction combined with differential aperture microscopy. Crystallographic tilts are considerably observed beneath the surface around a crack tip, and these are consistent with the high dislocation densities near the crack tip measured by neutron peak broadening.
C1 [Lee, S. Y.; Liaw, P. K.; Choo, H.; Sun, Y.; Fan, C.; Li, L.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Barabash, R. I.; Chung, J. -S.; Choo, H.; Ice, G. E.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Barabash, R. I.] Univ Tennessee, Ctr Mat Proc, Knoxville, TN 37996 USA.
[Chung, J. -S.] Soongsil Univ, Dept Phys, Seoul 156743, South Korea.
[Brown, D. W.] Los Alamos Natl Lab, Los Alamos Neutron Sci Ctr, Los Alamos, NM 87545 USA.
RP Lee, SY (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM slee40@utk.edu
RI Choo, Hahn/A-5494-2009
OI Choo, Hahn/0000-0002-8006-8907
NR 25
TC 11
Z9 11
U1 0
U2 6
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 DEC
PY 2008
VL 39A
IS 13
BP 3164
EP 3169
DI 10.1007/s11661-008-9606-2
PG 6
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 371NT
UT WOS:000260838700015
ER
PT J
AU Wang, G
Wang, YD
Ren, Y
Liu, YD
Liaw, PK
AF Wang, Gang
Wang, Yan-Dong
Ren, Yang
Liu, Yandong
Liaw, Peter K.
TI In-Situ High-Energy X-Ray Diffuse-Scattering Study of the Phase
Transition in a Ni2MnGa Ferromagnetic Shape-Memory Crystal
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Neutron and X-Ray Studies for Probing Materials Behavior
held at the 137th TMS Annual Meeting and Exhibition
CY MAR 09-SEP 13, 2008
CL New Orleans, LA
SP TMS
ID FIELD-INDUCED STRAIN; ALLOY; MARTENSITE; GROWTH; TRANSFORMATIONS;
DIFFRACTION; TEXTURES
AB The full information on the changes in many crystallographic aspects, including the structural and microstructural characterizations, during the phase transformation is essential for understanding the phase transition and "memory" behavior in the ferromagnetic shape-memory alloys. In the present article, the defects-related microstructural features connected to the premartensitic and martensitic transition of a Ni2MnGa single crystal under a uniaxial pressure of 50 MPa applied along the [110] crystallographic direction were studied by the in-situ high-energy X-ray diffuse-scattering experiments. The analysis of the characteristics of diffuse-scattering patterns around different sharp Bragg spots suggests that the influences of some defect clusters on the pressure-induced phase-transition sequences of Ni2MnGa are significant. Our experiments show that an intermediate phase is produced during the premartensitic transition in the Ni2MnGa single crystal, which is favorable for the nucleation of a martensitic phase. The compression stress along the [110] direction of the Heusler phase can promote the premartensitic and martensitic transition of the Ni2MnGa single crystal.
C1 [Wang, Gang; Wang, Yan-Dong; Liu, Yandong] Northeastern Univ, Minist Educ, Key Lab Anisotropy & Texture Mat, Shenyang 110004, Peoples R China.
[Ren, Yang] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA.
[Liaw, Peter K.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
RP Wang, G (reprint author), Northeastern Univ, Minist Educ, Key Lab Anisotropy & Texture Mat, Shenyang 110004, Peoples R China.
EM wangg@smm.neu.edu.cn
RI wang, yandong/G-9404-2013
NR 22
TC 3
Z9 3
U1 0
U2 1
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 DEC
PY 2008
VL 39A
IS 13
BP 3184
EP 3190
DI 10.1007/s11661-008-9670-7
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 371NT
UT WOS:000260838700018
ER
PT J
AU Pereloma, EV
Miller, MK
Timokhina, IB
AF Pereloma, E. V.
Miller, M. K.
Timokhina, I. B.
TI On the Decomposition of Martensite during Bake Hardening of
Thermomechanically Processed Transformation-Induced Plasticity Steels
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Neutron and X-Ray Studies for Probing Materials Behavior
held at the 137th TMS Annual Meeting and Exhibition
CY MAR 09-SEP 13, 2008
CL New Orleans, LA
SP TMS
ID FIELD-ION MICROSCOPY; ATOM-PROBE ANALYSIS; RETAINED AUSTENITE; CARBON
MARTENSITE; CARBIDE PRECIPITATION; MECHANICAL-PROPERTIES; TRIP STEELS;
IRON; NB; MICROSTRUCTURE
AB Thermomechanically processed (TMP) CMnSi transformation-induced plasticity (TRIP) steels with and without additions of Nb, Mo, or Al were subjected to prestraining and bake hardening. Atom probe tomography (APT) revealed the presence of fine C-rich clusters in the martensite of all studied steels after the thermomechanical processing. After bake hardening, the formation of iron carbides, containing from 25 to 90 at. pct C, was observed. The evolution of iron carbide compositions was independent of steel composition and was a function of carbide size.
C1 [Pereloma, E. V.] Univ Wollongong, Sch Mech Mat & Mechatron Engn, BlueScope Steel Met Ctr, Wollongong, NSW 2522, Australia.
[Miller, M. K.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Timokhina, I. B.] Deakin Univ, Fac Sci & Technol, Ctr Mat & Fibre Innovat, Geelong, Vic 3217, Australia.
RP Pereloma, EV (reprint author), Univ Wollongong, Sch Mech Mat & Mechatron Engn, BlueScope Steel Met Ctr, Wollongong, NSW 2522, Australia.
EM elenap@uow.edu.au
NR 34
TC 16
Z9 16
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 DEC
PY 2008
VL 39A
IS 13
BP 3210
EP 3216
DI 10.1007/s11661-008-9663-6
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 371NT
UT WOS:000260838700021
ER
PT J
AU Pierazzo, E
Artemieva, N
Asphaug, E
Baldwin, EC
Cazamias, J
Coker, R
Collins, GS
Crawford, DA
Davison, T
Elbeshausen, D
Holsapple, KA
Housen, KR
Korycansky, DG
Wunnemann, K
AF Pierazzo, E.
Artemieva, N.
Asphaug, E.
Baldwin, E. C.
Cazamias, J.
Coker, R.
Collins, G. S.
Crawford, D. A.
Davison, T.
Elbeshausen, D.
Holsapple, K. A.
Housen, K. R.
Korycansky, D. G.
Wuennemann, K.
TI Validation of numerical codes for impact and explosion cratering:
Impacts on strengthless and metal targets
SO METEORITICS & PLANETARY SCIENCE
LA English
DT Article; Proceedings Paper
CT Bridging the Gap II Workshop
CY SEP 22-26, 2007
CL Canadian Space Agency, St Hubert, CANADA
HO Canadian Space Agency
ID HIGH-RESOLUTION SIMULATIONS; DUCTILE POROUS MATERIALS; VENUSIAN
ATMOSPHERE; PARTICLE HYDRODYNAMICS; MELT PRODUCTION; 3D MODELS;
EQUATION; STATE; ASTEROIDS; FRACTURE
AB Over the last few decades, rapid improvement of computer capabilities has allowed impact cratering to be modeled with increasing complexity and realism, and has paved the way for a new era of numerical modeling of the impact process, including Full, three-dimensional (3D) simulations. When properly benchmarked and validated against observation, computer models offer a powerful tool for understanding the mechanics of impact crater formation. This work presents results from the first phase of a project to benchmark and validate shock codes. A variety of 2D and 3D codes were used in this Study, from commercial products like AUTODYN, to codes developed within the scientific community like SOVA, SPH, ZEUS-MP, iSALE, and codes developed at U.S. National Laboratories like CTH, SAGE/RAGE, and ALE3D. Benchmark calculations of shock wave propagation in aluminum-on-aluminum impacts were performed to examine the agreement between codes for simple idealized problems. The benchmark simulations show that variability in code results is to be expected due to differences in the underlying solution algorithm of each code, artificial stability parameters, spatial and temporal resolution, and material models. Overall, the inter-code variability in peak shock pressure as a function of distance is around 10 to 20%. In general, if the impactor is resolved by at least 20 cells across its radius, the underestimation of peak shock pressure due to spatial resolution is less than 10%. In addition to the benchmark tests, three validation tests were performed to examine the ability of the codes to reproduce the time evolution of crater radius and depth observed in vertical laboratory impacts in water and two well-characterized aluminum alloys. Results from these calculations are in good agreement with experiments. There appears to be a general tendency of shock physics codes to underestimate the radius of the forming crater. Overall, the discrepancy between the model and experiment results is between 10 and 20%, similar to the inter-code variability.
C1 [Pierazzo, E.; Artemieva, N.] Planetary Sci Inst, Tucson, AZ 85719 USA.
[Artemieva, N.] Russian Acad Sci, Inst Dynam Geospheres, Moscow 119334, Russia.
[Asphaug, E.; Korycansky, D. G.] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA.
[Baldwin, E. C.] UCL, London WC1E 6BT, England.
[Cazamias, J.] Univ Alabama, Birmingham, AL 35294 USA.
[Coker, R.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Collins, G. S.; Davison, T.] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
[Crawford, D. A.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Elbeshausen, D.; Wuennemann, K.] Humboldt Univ, Nat Hist Museum, D-10099 Berlin, Germany.
[Holsapple, K. A.] Univ Washington, Seattle, WA 98195 USA.
[Housen, K. R.] Boeing Co, Seattle, WA 98124 USA.
RP Pierazzo, E (reprint author), Planetary Sci Inst, 1700 E Ft Lowell Rd,Suite 106, Tucson, AZ 85719 USA.
EM betty@psi.edu
RI Davison, Thomas/A-9759-2012;
OI Collins, Gareth/0000-0002-6087-6149
NR 58
TC 67
Z9 67
U1 3
U2 25
PU METEORITICAL SOC
PI FAYETTEVILLE
PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 USA
SN 1086-9379
J9 METEORIT PLANET SCI
JI Meteorit. Planet. Sci.
PD DEC
PY 2008
VL 43
IS 12
BP 1917
EP 1938
PG 22
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 419RS
UT WOS:000264237700002
ER
PT J
AU Osinski, GR
Kieniewicz, J
Smith, JR
Boslough, MBE
Eccleston, M
Schwarcz, HP
Kleindienst, MR
Haldemann, AFC
Churcher, CS
AF Osinski, Gordon R.
Kieniewicz, Johanna
Smith, Jennifer R.
Boslough, Mark B. E.
Eccleston, Mark
Schwarcz, Henry P.
Kleindienst, Maxine R.
Haldemann, Albert F. C.
Churcher, Charles S.
TI The Dakhleh Glass: Product of an impact airburst or cratering event in
the Western Desert of Egypt?
SO METEORITICS & PLANETARY SCIENCE
LA English
DT Article; Proceedings Paper
CT Bridging the Gap II Workshop
CY SEP 22-26, 2007
CL Canadian Space Agency, St Hubert, CANADA
HO Canadian Space Agency
ID SHOCK METAMORPHISM; SOIL TEMPERATURES; LIBYAN DESERT; METEOR CRATER;
PLEISTOCENE; GEOCHEMISTRY; AUSTRALIA; OBJECTS; ROCKS
AB Impact cratering is a ubiquitous geological process oil the terrestrial planets. Meteorite impact craters are the most visible product of impact events, but there is a growing recognition that large aerial bursts or airbursts should occur relatively frequently throughout geological time. In this contribution, we report on an Unusual impact glass-the Dakhleh Glass (DG)-which is distributed over an area of similar to 400 km(2) of the Dakhleh Oasis, Egypt. This region preserves a rich history of habitation stretching back to over 400,000 years before the emergence of Homo sapiens. We report oil observations made during recent fieldwork and subsequent analytical analyses that strengthen previous Suggestions that the DG formed during all impact event. The wide distribution and large size of DG specimens (Lip to similar to 50 cm across), the chemistry (e.g., CaO and Al(2)O(3) contents up to similar to 25 and similar to 18 wt%, respectively), the presence of lechatelierite and burnt sediments, and the inclusion of clasts and spherules in the DG is inconsistent with known terrestrial processes of glass formation. The age and other textural characteristics rule out a human origin. Instead, we draw upon recent numerical modeling of airbursts to suggest that the properties of DG, Coupled with the absence of a confirmed crater, can best be explained by melting of surficial sediments as a result of a large airburst event. We Suggest that glass produced by such events should, therefore, be more common in the rock record than impact craters, assuming that the glass formed in a suitable preserving environment.
C1 [Osinski, Gordon R.] Univ Western Ontario, Dept Earth Sci, London, ON N6A 5B7, Canada.
[Osinski, Gordon R.] Univ Western Ontario, Dept Phys & Astron, London, ON N6A 5B7, Canada.
[Kieniewicz, Johanna] Denison Univ, Dept Geosci, Granville, OH 43023 USA.
[Smith, Jennifer R.] Washington Univ, St Louis, MO 63130 USA.
[Boslough, Mark B. E.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Eccleston, Mark] La Trobe Univ, Archaeol Program, Bundoora, Vic 3086, Australia.
[Schwarcz, Henry P.] McMaster Univ, Sch Geog & Earth Sci, Hamilton, ON L8S 4K1, Canada.
[Kleindienst, Maxine R.] Univ Toronto, Dept Anthropol, Mississauga, ON L5L 1C6, Canada.
[Churcher, Charles S.] Univ Toronto, Dept Zool, Toronto, ON M5S 3G5, Canada.
[Haldemann, Albert F. C.] European Space Agcy, ESTEC HME ME, NL-2200 AG Noordwijk, Netherlands.
RP Osinski, GR (reprint author), Univ Western Ontario, Dept Earth Sci, London, ON N6A 5B7, Canada.
EM gosinski@uwo.ca
NR 48
TC 8
Z9 8
U1 2
U2 4
PU METEORITICAL SOC
PI FAYETTEVILLE
PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 USA
SN 1086-9379
J9 METEORIT PLANET SCI
JI Meteorit. Planet. Sci.
PD DEC
PY 2008
VL 43
IS 12
BP 2089
EP 2106
PG 18
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 419RS
UT WOS:000264237700012
ER
PT J
AU Kunin, V
Copeland, A
Lapidus, A
Mavromatis, K
Hugenholtz, P
AF Kunin, Victor
Copeland, Alex
Lapidus, Alla
Mavromatis, Konstantinos
Hugenholtz, Philip
TI A Bioinformatician's Guide to Metagenomics
SO MICROBIOLOGY AND MOLECULAR BIOLOGY REVIEWS
LA English
DT Review
ID IN-SITU HYBRIDIZATION; MULTIPLE DISPLACEMENT AMPLIFICATION; WHOLE-GENOME
AMPLIFICATION; MICROBIAL COMMUNITIES; ENVIRONMENTAL-SAMPLES; PROTEIN
FUNCTION; PHYLOGENETIC CLASSIFICATION; MARINE BACTERIOPLANKTON; SHOTGUN
SEQUENCES; BACTERIAL GENOMES
AB As random shotgun metagenomic projects proliferate and become the dominant source of publicly available sequence data, procedures for the best practices in their execution and analysis become increasingly important. Based on our experience at the Joint Genome Institute, we describe the chain of decisions accompanying a metagenomic project from the viewpoint of the bioinformatic analysis step by step. We guide the reader through a standard workflow for a metagenomic project beginning with presequencing considerations such as community composition and sequence data type that will greatly influence downstream analyses. We proceed with recommendations for sampling and data generation including sample and metadata collection, community profiling, construction of shotgun libraries, and sequencing strategies. We then discuss the application of generic sequence processing steps (read preprocessing, assembly, and gene prediction and annotation) to metagenomic data sets in contrast to genome projects. Different types of data analyses particular to metagenomes are then presented, including binning, dominant population analysis, and gene-centric analysis. Finally, data management issues are presented and discussed. We hope that this review will assist bioinformaticians and biologists in making better-informed decisions on their journey during a metagenomic project.
C1 [Kunin, Victor; Hugenholtz, Philip] DOE Joint Genome Inst, Microbial Ecol Program, Walnut Creek, CA USA.
[Copeland, Alex] DOE Joint Genome Inst, Qual Assurance Dept, Walnut Creek, CA USA.
[Lapidus, Alla] DOE Joint Genome Inst, Microbial Genom Dept, Walnut Creek, CA USA.
[Mavromatis, Konstantinos] DOE Joint Genome Inst, Genome Biol Program, Walnut Creek, CA USA.
RP Hugenholtz, P (reprint author), DOE Joint Genome Inst, Microbial Ecol Program, 2800 Mitchell Dr, Walnut Creek, CA USA.
EM phugenholtz@lbl.gov
RI Ducey, Thomas/A-6493-2011; Hugenholtz, Philip/G-9608-2011; Lapidus,
Alla/I-4348-2013;
OI Lapidus, Alla/0000-0003-0427-8731; hugenholtz,
philip/0000-0001-5386-7925
FU University of California Lawrence Berkeley National Laboratory
[DE-AC02-05CH11231]; Lawrence Livermore National Laboratory
[DE-AC5207NA27344]; Los Alamos National Laboratory [DE-AC02-06NA25396]
FX This work was performed under the auspices of the Biological and
Environmental Research Program of the U. S. Department of Energy's
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-AC5207NA27344, and
Los Alamos National Laboratory under contract no. DE-AC02-06NA25396.
NR 152
TC 172
Z9 182
U1 12
U2 103
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 1092-2172
J9 MICROBIOL MOL BIOL R
JI Microbiol. Mol. Biol. Rev.
PD DEC
PY 2008
VL 72
IS 4
BP 557
EP 578
DI 10.1128/MMBR.00009-08
PG 22
WC Microbiology
SC Microbiology
GA 379GO
UT WOS:000261384900001
PM 19052320
ER
PT J
AU Marquis, EA
Vurpillot, F
AF Marquis, Emmanuelle A.
Vurpillot, Francois
TI Chromatic Aberrations in the Field Evaporation Behavior of Small
Precipitates
SO MICROSCOPY AND MICROANALYSIS
LA English
DT Article
DE atom probe tomography; 3D reconstruction; precipitates; alloys
ID 3-DIMENSIONAL ATOM-PROBE; LOCAL MAGNIFICATION; ION MICROSCOPY; ALLOYS;
TOMOGRAPHY; RECONSTRUCTION; PATTERNS; SURFACES; OVERLAPS; LATTICE
AB Artifacts in the field evaporation behavior of small precipitates have limited the accuracy of atom probe tomography analysis of clusters and precipitates smaller than 2 nm. Here, we report on specific observations of reconstruction artifacts that were obtained in case of precipitates with radii less than 10 nm in Al alloys, focusing particularly on a shift that appears in the relative positioning of matrix and precipitate atoms. We show that this chemically dependent behavior, referred to as "chromatic aberration," is due to the electrostatic field above the emitter and the variations in field evaporation of the elements constituting the precipitates.
C1 [Marquis, Emmanuelle A.] Univ Oxford, Dept Mat, Oxford OX1 3PH, England.
[Marquis, Emmanuelle A.] Sandia Natl Labs, Dept Mat Phys, Livermore, CA 94550 USA.
[Vurpillot, Francois] Inst Mat Rouen, CNRS, UMR 6634, Grp Phys Mat, F-76801 St Etienne, France.
RP Marquis, EA (reprint author), Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England.
EM emmanuelle.marquis@materials.ox.ac.uk
RI Marquis, Emmanuelle/O-5647-2014
OI Marquis, Emmanuelle/0000-0002-6476-2835
FU Office of Basic Energy Sciences; Division of Materials Sciences; U.S.
Department of Energy [DEAC0494AL85000]; EPSRC [EP/077664/1]
FX E.A.M. thanks Mark Homer (Sandia National Laboratories) for his
contribution to specimen preparation. The authors would also like to
thank Alfred Cerezo for interesting discussions. This work was supported
in part by the Office of Basic Energy Sciences, Division of Materials
Sciences, U.S. Department of Energy, under contract no. DEAC0494AL85000.
The OPAL U.K. facility for atomic scale analysis (EPSRC grant number
EP/077664/1) was used for part of the work.
NR 41
TC 54
Z9 54
U1 1
U2 17
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 1431-9276
J9 MICROSC MICROANAL
JI Microsc. microanal.
PD DEC
PY 2008
VL 14
IS 6
BP 561
EP 570
DI 10.1017/S1431927608080793
PG 10
WC Materials Science, Multidisciplinary; Microscopy
SC Materials Science; Microscopy
GA 376EA
UT WOS:000261164800009
PM 18986609
ER
PT J
AU Macey, JR
Kuehl, JV
Larson, A
Robinson, MD
Ugurtas, IH
Ananjeva, NB
Rahman, H
Javed, HI
Osmani, RM
Doumma, A
Papenfuss, TJ
AF Macey, J. Robert
Kuehl, Jennifer V.
Larson, Allan
Robinson, Michael D.
Ugurtas, Ismail H.
Ananjeva, Natalia B.
Rahman, Hafizur
Javed, Hamid Iqbal
Osmani, Ridwan Mohamed
Doumma, Ali
Papenfuss, Theodore J.
TI Socotra Island the forgotten fragment of Gondwana: Unmasking chameleon
lizard history with complete mitochondrial genomic data
SO MOLECULAR PHYLOGENETICS AND EVOLUTION
LA English
DT Article
DE Reptilia; Chamaeleonidae; Gondwana; Biogeography; Phylogeny
ID TRANSFER-RNA GENES; PHYLOGENETIC-RELATIONSHIPS; TESTING HYPOTHESES;
LAUDAKIA-CAUCASIA; IRANIAN PLATEAU; AGAMID LIZARDS; SUBUNIT RNA;
EVOLUTION; RADIATION; SEQUENCES
C1 [Macey, J. Robert] Merritt Coll, Dept Biol, Oakland, CA 94619 USA.
[Macey, J. Robert; Papenfuss, Theodore J.] Univ Calif Berkeley, Museum Vertebrate Zool, Berkeley, CA 94720 USA.
[Kuehl, Jennifer V.] Lawrence Berkeley Natl Lab, DOE Joint Genome Inst, Dept Evolutionary Genom, Walnut Creek, CA 94598 USA.
[Larson, Allan] Washington Univ, Dept Biol, St Louis, MO 63130 USA.
[Robinson, Michael D.] Sultan Qaboos Univ, Dept Biol, PC-123 Muscat, Oman.
[Ugurtas, Ismail H.] Uludag Univ, Dept Biol, TR-16059 Bursa, Turkey.
[Ananjeva, Natalia B.] Russian Acad Sci, Inst Zool, St Petersburg 199034, Russia.
[Rahman, Hafizur] Govt Pakistan, Zool Survey Dept, Karachi, Pakistan.
[Javed, Hamid Iqbal] Govt Pakistan, Zool Survey Dept, Islamabad, Pakistan.
[Osmani, Ridwan Mohamed] Amoud Univ, Borama, Somalia.
[Doumma, Ali] Abdou Moumouni Univ Niamey, Fac Sci, Niamey, Niger.
RP Macey, JR (reprint author), Merritt Coll, Dept Biol, 12500 Campus Dr, Oakland, CA 94619 USA.
EM jrobertmacey@gmail.com
FU American Institute for Yemeni Studies facilitated fieldwork in Yemen
including Socotra Island; US Department of Energy's Office of Science,
Biological and Environmental Research Program; University of California;
LLNL [W-7405-Eng48, DE-AC03-76SF00098, LANL No. W-7405-ENG-36]
FX Eddy Rubin, James Bristow and Jeffery L. Boore provided support. Karen
Klitz prepared Fig. 1. Craig L. Hassapakis assisted with GenBank
submissions. H. Mathew Fourcade assisted with laboratory work. The
American Institute for Yemeni Studies facilitated fieldwork in Yemen
including Socotra Island. This work was performed under the auspices of
the US Department of Energy's Office of Science, Biological and
Environmental Research Program and by the University of California, LLNL
under contract No. W-7405-Eng48, LBNL No. DE-AC03-76SF00098 and LANL No.
W-7405-ENG-36.
NR 30
TC 23
Z9 26
U1 1
U2 4
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1055-7903
J9 MOL PHYLOGENET EVOL
JI Mol. Phylogenet. Evol.
PD DEC
PY 2008
VL 49
IS 3
BP 1015
EP 1018
DI 10.1016/j.ympev.2008.08.024
PG 4
WC Biochemistry & Molecular Biology; Evolutionary Biology; Genetics &
Heredity
SC Biochemistry & Molecular Biology; Evolutionary Biology; Genetics &
Heredity
GA 383BA
UT WOS:000261647900027
PM 18832039
ER
PT J
AU Dag, S
Wang, LW
AF Dag, S.
Wang, Lin-Wang
TI Modeling of Nanoscale Morphology of Regioregular Poly(3-hexylthiophene)
on a ZnO (10(1)over-bar0) Surface
SO NANO LETTERS
LA English
DT Article
ID TOTAL-ENERGY CALCULATIONS; SOLAR-CELLS; CONJUGATED POLYMER;
ELECTRON-TRANSFER; NANOWIRE ARRAYS; ZINC-OXIDE; AB-INITIO;
SEMICONDUCTORS; DYNAMICS; TIO2
AB We report detailed ab initio calculations of poly(3-hexylthiophene) (P3HT) on top of a ZnO (10 (1) over bar0) surface. We studied different absorption sites and orientations. We found that the P3HT chain prefers to lay along the dimer row direction of the ZnO surface. We also found strong coupling between the P3HT molecule and the ZnO substrate in the conduction band states, while minimum coupling in the valence band states.
C1 [Dag, S.; Wang, Lin-Wang] Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Sci Comp Grp, Berkeley, CA 94720 USA.
RP Dag, S (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Sci Comp Grp, Berkeley, CA 94720 USA.
EM sdag@lbl.gov
FU Department of Energy BES/SC [DE-AC02-05-CH11231]
FX This work is supported by Department of Energy BES/SC under Contract No.
DE-AC02-05-CH11231. It uses the resources of the National Energy
Research Scientific Computing Center (NERSC).
NR 31
TC 28
Z9 28
U1 1
U2 12
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 DEC
PY 2008
VL 8
IS 12
BP 4185
EP 4190
DI 10.1021/nl801700s
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 382UK
UT WOS:000261630700017
PM 19368000
ER
PT J
AU Park, CH
Giustino, F
Cohen, ML
Louie, SG
AF Park, Cheol-Hwan
Giustino, Feliciano
Cohen, Marvin L.
Louie, Steven G.
TI Electron-Phonon Interactions in Graphene, Bilayer Graphene, and Graphite
SO NANO LETTERS
LA English
DT Article
ID PSEUDOPOTENTIALS; SYSTEMS; ENERGY; STATE; GAS
AB Using first-principles techniques, we calculate the renormalization of the electron Fermi velocity and the vibrational lifetimes arising from electron-phonon interactions in doped bilayer graphene and in graphite and compare the results with the corresponding quantities in graphene. For similar levels of doping, the Fermi velocity renormalization in bilayer graphene and in graphite is found to be approximately 30% larger than that in graphene. In the case of bilayer graphene, this difference is shown to arise from the interlayer interaction. We discuss our findings in the light of recent photoemission and Raman spectroscopy experiments.
C1 [Park, Cheol-Hwan] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Park, CH (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM cheolwhan@civet.berkeley.edu
RI Park, Cheol-Hwan/A-1543-2009; Giustino, Feliciano/F-6343-2013;
OI Park, Cheol-Hwan/0000-0003-1584-6896; Giustino,
Feliciano/0000-0001-9293-1176
FU NSF [DMR07-05941]; Director, Office of Science, Office of Basic Energy
Sciences, Division of Materials Sciences and Engineering Division; U.S.
Department of Energy [DE- AC02-05CH11231]
FX We thank Eli Rotenberg, Jessica L. McChesney, Aaron Bostwick, Michel
Cote, Jia-An Yan, and Jay Deep San for fruitful discussions. This work
was supported by NSF Grant No. DMR07-05941 and by the Director, Office
of Science, Office of Basic Energy Sciences, Division of Materials
Sciences and Engineering Division, U.S. Department of Energy under
Contract No. DE- AC02-05CH11231. Computational resources have been
provided by the National Partnership for Advanced Computational
Infrastructure (NPACI) and the National Energy Research Scientific
Computing Center (NERSC). Part of the calculations were performed using
modified versions of the Quantum-Espresso40,10 and the
Wannie41 packages. C
NR 43
TC 84
Z9 84
U1 6
U2 55
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 DEC
PY 2008
VL 8
IS 12
BP 4229
EP 4233
DI 10.1021/nl801884n
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 382UK
UT WOS:000261630700025
PM 19368001
ER
PT J
AU Beard, MC
Blackburn, JL
Heben, MJ
AF Beard, Matthew C.
Blackburn, Jeffrey L.
Heben, Michael J.
TI Photogenerated Free Carrier Dynamics in Metal and Semiconductor
Single-Walled Carbon Nanotube Films
SO NANO LETTERS
LA English
DT Article
ID RESOLVED TERAHERTZ SPECTROSCOPY; ELECTRONIC-STRUCTURE; NETWORKS;
PHOTOCONDUCTIVITY; GAAS; CONDUCTIVITY; ROPES
AB Time-resolved THz spectroscopy (TRTS) is employed to study the photogenerated charge-carrier dynamics in transparent films of single-walled carbon nanotubes (SWNTs). Two films were investigated: a film with 94% semiconducting-type tubes (s-SWNTs) and a film with only 7% s-SWNT and 93% metal-type tubes (m-SWNTs). We conclude that charge-carriers are generated with > 60% yields at low light intensities in both films. Free-carriers are generated by a linear exciton dissociation process that occurs within similar to 1 ps and is independent of excitation wavelength or tube type.
C1 [Beard, Matthew C.; Blackburn, Jeffrey L.; Heben, Michael J.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Beard, MC (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM matt_beard@nrel.gov
RI Blackburn, Jeffrey/D-7344-2012;
OI BEARD, MATTHEW/0000-0002-2711-1355
FU U.S. Department of Energy [DE-AC36-08G028308]
FX We thank Garry Rumbles, Andrew Ferguson, and Randy Ellingson for useful
discussions. Funding for this work was generously provided by the
Chemical Sciences, Geosciences, and Biosciences Division, Office of
Basic Energy Sciences, U.S. Department of Energy, under contract
DE-AC36-08G028308 to the National Renewable Energy.
NR 32
TC 44
Z9 45
U1 3
U2 25
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 DEC
PY 2008
VL 8
IS 12
BP 4238
EP 4242
DI 10.1021/nl801913y
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 382UK
UT WOS:000261630700027
PM 19367928
ER
PT J
AU Han, S
Xiong, Y
Genov, D
Liu, ZW
Bartal, G
Zhang, X
AF Han, Seunghoon
Xiong, Yi
Genov, Dentcho
Liu, Zhaowei
Bartal, Guy
Zhang, Xiang
TI Ray Optics at a Deep-Subwavelength Scale: A Transformation Optics
Approach
SO NANO LETTERS
LA English
DT Article
ID FIELD; METAMATERIALS; ELECTRONICS; HYPERLENS; INDEX
AB We present a transformation optics approach for molding the light flow at the deep-subwavelength scale, using metamaterials with uniquely designed dispersion. By conformal transformation of the electromagnetic space, we develop a methodology for realizing subwavelength ray optics with curved ray trajectories. This enables deep-subwavelength-scale beams to flow through two- or three-dimensional spaces.
C1 [Han, Seunghoon; Xiong, Yi; Genov, Dentcho; Liu, Zhaowei; Bartal, Guy; Zhang, Xiang] Univ Calif Berkeley, NSF Nanoscale Sci & Engn Ctr NSEC, Berkeley, CA 94720 USA.
[Zhang, Xiang] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Han, S (reprint author), Univ Calif Berkeley, NSF Nanoscale Sci & Engn Ctr NSEC, Berkeley, CA 94720 USA.
EM xiang@berkeley.edu
RI Liu, Zhaowei/A-8521-2010; Zhang, Xiang/F-6905-2011
FU U.S. Department of Energy [DE-AC0205CH 11231]; Scalable and Integrated
Nano Manufacturing (SINAM) [0327077]; Korean Government
[KRF-2006-214-DO0119]
FX This work was mainly supported by the U.S. Department of Energy under
Contract DE-AC0205CH 11231, and in partial support from the NSF Centre
for Scalable and Integrated Nano Manufacturing (SINAM) (Grant No.
DMI-0327077). Dr. S. Han thanks the support from the Korea Research
Foundation Grant funded by the Korean Government, KRF-2006-214-DO0119.
NR 32
TC 40
Z9 40
U1 2
U2 19
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 DEC
PY 2008
VL 8
IS 12
BP 4243
EP 4247
DI 10.1021/nl801942x
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 382UK
UT WOS:000261630700028
PM 19367843
ER
PT J
AU Yoon, D
Moon, H
Son, YW
Samsonidze, G
Park, BH
Kim, JB
Lee, Y
Cheong, H
AF Yoon, Duhee
Moon, Hyerim
Son, Young-Woo
Samsonidze, G.
Park, Bae Ho
Kim, Jin Bae
Lee, YoungPak
Cheong, Hyeonsik
TI Strong Polarization Dependence of Double-Resonant Raman Intensities in
Graphene
SO NANO LETTERS
LA English
DT Article
ID WALL CARBON NANOTUBES; EPITAXIAL GRAPHENE; DIRAC FERMIONS; SINGLE-WALL;
SPECTROSCOPY; SCATTERING; GRAPHITE; LAYER
AB Spatially resolved and polarized micro-Raman spectroscopy on microcrystalline graphene shows strong polarization dependences of double-resonance Raman intensities. The Raman intensity of the double-resonant 2D band is maximum when the excitation and detection polarizations are parallel and minimum when they are orthogonal, whereas that of the G band is isotropic. A calculation shows that this strong polarization dependence is a direct consequence of inhomogeneous optical absorption and emission mediated by electron-phonon interactions involved in the second-order Stokes-Stokes Raman scattering process.
C1 [Son, Young-Woo; Park, Bae Ho] Konkuk Univ, Dept Phys, Seoul 143701, South Korea.
[Yoon, Duhee; Cheong, Hyeonsik] Sogang Univ, Dept Phys, Seoul 121742, South Korea.
[Son, Young-Woo] Korea Inst Adv Study, Seoul 130722, South Korea.
[Samsonidze, G.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Samsonidze, G.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Kim, Jin Bae; Lee, YoungPak] Hanyang Univ, Quantum Photon Sci Res Ctr, Seoul 133791, South Korea.
RP Son, YW (reprint author), Konkuk Univ, Dept Phys, Seoul 143701, South Korea.
EM hand@kias.re.kr; hcheong@sogang.ac.kr
RI son, Young-Woo/B-2566-2010; Cheong, Hyeonsik/D-7424-2012; Park, Bae
Ho/D-4840-2011; Samsonidze, Georgy/G-3613-2016
OI Cheong, Hyeonsik/0000-0002-2347-4044; Samsonidze,
Georgy/0000-0002-3759-1794
FU Korea Research Foundation [KRF-2007-314-C00093]; Korea Science and
Engineering Foundation (KOSEF) [R01-2007-000-10654-0]; MEST [2008-03717,
R0A-2008-000-20052-0]
FX This work was supported in part by Korea Research Foundation (no.
KRF-2007-314-C00093). Y.-W.S. is supported in part by the Korea Science
and Engineering Foundation (KOSEF) grant funded by the Korea (government
(MEST) no. R01-2007-000-10654-0. J.B.K., Y.P.L., and H.C. are supported
in part by KOSEF grant funded by MEST (Quanturn Photonic Science
Research Center). D.Y. and H.C. are supported in part by Nano R&D
program through KOSEF funded by MEST (2008-03717). C, Zn B.H.P. was
supported by the KOSEF NRL Program grant Z funded by MEST (No.
R0A-2008-000-20052-0).
NR 29
TC 52
Z9 52
U1 2
U2 25
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 DEC
PY 2008
VL 8
IS 12
BP 4270
EP 4274
DI 10.1021/nl8017498
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 382UK
UT WOS:000261630700033
PM 19368002
ER
PT J
AU Cho, H
Baker, BR
Wachsmann-Hogiu, S
Pagba, CV
Laurence, TA
Lane, SM
Lee, LP
Tok, JBH
AF Cho, Hansang
Baker, Brian R.
Wachsmann-Hogiu, Sebastian
Pagba, Cynthia V.
Laurence, Ted A.
Lane, Stephen M.
Lee, Luke P.
Tok, Jeffrey B. -H.
TI Aptamer-Based SERRS Sensor for Thrombin Detection
SO NANO LETTERS
LA English
DT Article
ID ENHANCED RAMAN-SPECTROSCOPY; GOLD NANOPARTICLES; SILVER ELECTRODE;
METHYLENE-BLUE; DNA; RNA; MOLECULES; COCAINE; BINDING; PROBES
AB We describe an aptamer-based surface enhanced resonance Raman scattering (SERRS) sensor with high sensitivity, specificity, and stability for the detection of a coagulation protein, human alpha-thrombin. The sensor achieves high sensitivity and a limit of detection of 100 pM by monitoring the SERRS signal change upon the single-step of thrombin binding to immobilized thrombin binding aptamer. The selectivity of the sensor is demonstrated by the specific discrimination of thrombin from other protein analytes. The specific recognition and binding of thrombin by the thrombin binding aptamer is essential to the mechanism of the aptamer-based sensor, as shown through measurements using negative control oligonucleotides. In addition, the sensor can detect 1 nM thrombin in the presence of complex biofluids, such as 10% fetal calf serum, demonstrating that the immobilized, 5'-capped, 3'-capped aptamer is sufficiently robust for clinical diagnostic applications.
C1 [Cho, Hansang; Lee, Luke P.] Univ Calif Berkeley, Berkeley Sensor & Actuator Ctr, Biomol Nanotechnol Ctr, Dept Bioengn, Berkeley, CA 94720 USA.
[Cho, Hansang; Baker, Brian R.; Laurence, Ted A.; Lane, Stephen M.; Tok, Jeffrey B. -H.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Cho, Hansang; Wachsmann-Hogiu, Sebastian; Pagba, Cynthia V.; Lane, Stephen M.; Tok, Jeffrey B. -H.] Univ Calif Davis, NSF, Ctr Biophoton, Davis, CA 95817 USA.
RP Lee, LP (reprint author), Univ Calif Berkeley, Berkeley Sensor & Actuator Ctr, Biomol Nanotechnol Ctr, Dept Bioengn, Berkeley 408C Stanley Hall, Berkeley, CA 94720 USA.
EM lplee@berkeley.edu; jeff.tok@micropointbio.com
RI Baker, Brian/C-1628-2009; Laurence, Ted/E-4791-2011
OI Laurence, Ted/0000-0003-1474-779X
FU NCI NIH HHS [U54 CA151459]; NIAID NIH HHS [AI065359, U54 AI065359]
NR 36
TC 123
Z9 125
U1 10
U2 78
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 DEC
PY 2008
VL 8
IS 12
BP 4386
EP 4390
DI 10.1021/nl802245w
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 382UK
UT WOS:000261630700052
PM 19367849
ER
PT J
AU Bozovic, N
Bozovic, I
Misewich, J
AF Bozovic, Natasha
Bozovic, Ivan
Misewich, James
TI X-ray Nanocrystallography of Individual Carbon Nanotubes
SO NANO LETTERS
LA English
DT Article
ID ELECTRON-DIFFRACTION; MICROSCOPY; RESOLUTION; CONDUCTIVITY; MOLECULES;
EMISSION
AB By numerical simulations, we show that with the next-generation synchrotron sources one should be able to record within minutes an X-ray diffraction pattern of a single nanotube and from it decipher its detailed atomic structure. In calculated diffractograms we can even discern signatures of presence of a single adatom and locate its position. New synchrotrons will allow the existing method of electron nanocrystallography to be undertaken using X-ray beams, thus facilitating in situ environmental studies.
C1 [Bozovic, Natasha; Bozovic, Ivan; Misewich, James] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Bozovic, Natasha] San Jose State Univ, San Jose, CA 95192 USA.
RP Bozovic, I (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM bozovic@bnl.gov
FU BNL LDRD program
FX We are grateful to N. D'Imperio and R. Sundling for technical help, to
C.C. Kao and C. Nelson for useful discussion, and to J. Davenport for
access to Galaxy cluster. This work was supported by the BNL LDRD
program.
NR 48
TC 5
Z9 5
U1 0
U2 3
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 DEC
PY 2008
VL 8
IS 12
BP 4477
EP 4482
DI 10.1021/nl802428u
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 382UK
UT WOS:000261630700067
PM 19367933
ER
PT J
AU Chueh, YL
Ford, AC
Ho, JC
Jacobson, ZA
Fan, Z
Chen, CY
Chou, LJ
Javey, A
AF Chueh, Yu-Lun
Ford, Alexandra C.
Ho, Johnny C.
Jacobson, Zachery A.
Fan, Zhiyong
Chen, Chih-Yen
Chou, Li-Jen
Javey, Ali
TI Formation and Characterization of NixInAs/InAs Nanowire Heterostructures
by Solid Source Reaction
SO NANO LETTERS
LA English
DT Article
ID FIELD-EFFECT TRANSISTORS; CARBON NANOTUBES; ARRAYS; INTEGRATION;
CONTACT; DEVICES; SCALE
AB The formation of crystalline NixInAs and NixInAs/InAs/NixInAs heterostructure nanowires by the solid source reaction of InAs nanowires with Ni is reported for the first time. The fundamental kinetics of the Ni/InAs alloying reaction is explored, with the Ni diffusion reported as the rate determining step. The diffusivity of Ni is independent of the nanowire diameter, with an extracted diffusion activation energy of similar to 1 eV/atom. The metallic NixInAs exhibits a modest resistivity of similar to 167 mu Omega.cm for diameters >30 nm, with the resistivity increasing as the nanowire diameter is further reduced due to the enhanced surface scattering. The alloying reaction readily enables the fabrication of NixInAs/InAs/NixInAs heterostructure nanowire transistors for which the length of the InAs segment (i.e., channel length) is controllably reduced through subsequent thermal annealing steps, therefore enabling a systematic study of electrical properties as a function of channel length. From the electrical transport studies, an electron mean free path on the order of a few hundred nm is observed for InAs NWs with a unit length normalized, ON-state resistance of similar to 7.5 k Omega/mu m. This approach presents a route toward the fabrication for high performance InAs nanowire transistors with ohmic nanoscale contacts and low parasitic capacitances and resistances.
C1 [Chueh, Yu-Lun; Ford, Alexandra C.; Ho, Johnny C.; Jacobson, Zachery A.; Fan, Zhiyong; Javey, Ali] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA.
[Chueh, Yu-Lun; Ford, Alexandra C.; Ho, Johnny C.; Jacobson, Zachery A.; Fan, Zhiyong; Javey, Ali] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Chueh, Yu-Lun; Ford, Alexandra C.; Ho, Johnny C.; Jacobson, Zachery A.; Fan, Zhiyong; Javey, Ali] Univ Calif Berkeley, Berkeley Sensor & Actuator Ctr, Berkeley, CA 94720 USA.
[Chen, Chih-Yen; Chou, Li-Jen] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan.
RP Javey, A (reprint author), Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA.
EM ajavey@eecs.berkeley.edu
RI Fan, Zhiyong/C-4970-2012; Ho, Johnny/K-5275-2012; Javey,
Ali/B-4818-2013; Chueh, Yu-Lun/E-2053-2013;
OI Ho, Johnny/0000-0003-3000-8794; Chueh, Yu-Lun/0000-0002-0155-9987; Fan,
Zhiyong/0000-0002-5397-0129
FU MARCO/MSD Focus Center-Research Program; Intel Graduate Fellowship;
Lawrence Berkeley National Laboratory
FX This work was supported by MARCO/MSD Focus Center-Research Program,
Intel Corporation, and Berkeley Sensor and Actuator Center. J.C.H.
acknowledges an Intel Graduate Fellowship. The synthesis part of this
work was supported by a LDRD from Lawrence Berkeley National Laboratory.
All fabrication was performed at the UC Berkeley Microlab facility.
NR 37
TC 45
Z9 45
U1 0
U2 27
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 DEC
PY 2008
VL 8
IS 12
BP 4528
EP 4533
DI 10.1021/nl802681x
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 382UK
UT WOS:000261630700076
PM 19367855
ER
PT J
AU Meister, S
Schoen, DT
Topinka, MA
Minor, AM
Cui, Y
AF Meister, Stefan
Schoen, David T.
Topinka, Mark A.
Minor, Andrew M.
Cui, Yi
TI Void Formation Induced Electrical Switching in Phase-Change Nanowires
SO NANO LETTERS
LA English
DT Article
ID CRYSTALLINE GETE FILMS; GERMANIUM TELLURIDE; MEMORY; NONVOLATILE;
MECHANISM; BEHAVIOR; STORAGE; GROWTH
AB Solid-state structural transformation coupled with an electronic property change is an important mechanism for nonvolatile information storage technologies, such as phase-change memories. Here we exploit phase-change GeTe single-nanowire devices combined with ex situ and in situ transmission electron microscopy to correlate directly nanoscale structural transformations with electrical switching and discover surprising results. Instead of crystalline-amorphous transformation, the dominant switching mechanism during multiple cycling appears to be the opening and closing of voids in the nanowires due to material migration, which offers a new mechanism for memory. During switching, composition change and the formation of banded structural defects are observed in addition to the expected crystal-amorphous transformation. Our method and results are important to phase-change memories specifically, but also to any device whose operation relies on a small scale structural transformation.
C1 [Meister, Stefan; Schoen, David T.; Cui, Yi] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA.
[Topinka, Mark A.] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
[Minor, Andrew M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
[Minor, Andrew M.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
RP Cui, Y (reprint author), Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA.
EM yicui@stanford.edu
RI Cui, Yi/L-5804-2013
OI Cui, Yi/0000-0002-6103-6352
NR 26
TC 54
Z9 54
U1 1
U2 33
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 DEC
PY 2008
VL 8
IS 12
BP 4562
EP 4567
DI 10.1021/nl802808f
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 382UK
UT WOS:000261630700082
PM 19367977
ER
PT J
AU Hurlbut, D
AF Hurlbut, David
TI A Look Behind the Texas Renewable Portfolio Standard: A Case Study
SO NATURAL RESOURCES JOURNAL
LA English
DT Article
AB A renewable portfolio standard (RPS-a statutory requirement to achieve a renewable energy goal by a certain date - is the tool of choice for many state policy makers concerned about climate change and the role played by electric generation. Texas enacted its RPS in 1999, since that time, it has added the most renewable capacity of any state and has rapidly outpaced its statutory goals. The numbers do not tell the whole story, however. This article examines the Texas RPS from two public policy perspectives seldom addressed in previous studies: the politics that shaped the statute creating the RPS and threshold judgments made by the agency implementing the statute. One factor crucial to the political fortunes of the RPS in the Texas Legislature was strategic linkage, that is, associating the RPS with related issues that had ascended high on the legislative agenda, such as competitive restructuring of the state's electricity market.
Once the RPS was enacted, the Public Utility Commission of Texas (PUCT) aimed to build a practical policy framework in which renewable energy development overall would be a response both to the RPS mandate and to customer-driven demand. The PUCT adopted a "carrot and stick" approach, imposing penalties for falling short of mandated goals, while at the same time creating a portfolio of measures to ensure that the market was fully able to respond to consumer demand. The Texas experience suggests that economically sustainable renewable energy is the true underlying objective of an RPS; building competition in to RPS implementation promotes economic efficiency and increases demand for renewable energy, an RPS, a system of renewable energy credits and green-power policies works best as an integrated package, the regime of rules needs to be stable, and an RPS goal need not be ambitious in order to succeed.
C1 Natl Renewable Energy Lab, Golden, CO USA.
RP Hurlbut, D (reprint author), Natl Renewable Energy Lab, Golden, CO USA.
NR 26
TC 4
Z9 4
U1 2
U2 4
PU UNIV NEW MEXICO
PI ALBUQUERQUE
PA SCH LAW, MSC 11-6070, 1 UNIVERSITY NEW MEXICO, ALBUQUERQUE, NM
87131-0001 USA
SN 0028-0739
J9 NAT RESOUR J
JI Nat. Resour. J.
PD WIN
PY 2008
VL 48
IS 1
BP 129
EP 161
PG 33
WC Environmental Studies; Law
SC Environmental Sciences & Ecology; Government & Law
GA 370BJ
UT WOS:000260737400006
ER
PT J
AU Romeo, S
Kozlitina, J
Xing, C
Pertsemlidis, A
Cox, D
Pennacchio, LA
Boerwinkle, E
Cohen, JC
Hobbs, HH
AF Romeo, Stefano
Kozlitina, Julia
Xing, Chao
Pertsemlidis, Alexander
Cox, David
Pennacchio, Len A.
Boerwinkle, Eric
Cohen, Jonathan C.
Hobbs, Helen H.
TI Genetic variation in PNPLA3 confers susceptibility to nonalcoholic fatty
liver disease
SO NATURE GENETICS
LA English
DT Article
ID LIPID ACYL HYDROLASE; HEPATIC STEATOSIS; UNITED-STATES;
ETHNIC-DIFFERENCES; AFRICAN-AMERICANS; FAMILY-MEMBERS; POPULATION;
PREVALENCE; PATATIN; EXPRESSION
AB Nonalcoholic fatty liver disease (NAFLD) is a burgeoning health problem of unknown etiology that varies in prevalence among ancestry groups. To identify genetic variants contributing to differences in hepatic fat content, we carried out a genome-wide association scan of nonsynonymous sequence variations (n = 9,229) in a population comprising Hispanic, African American and European American individuals. An allele in PNPLA3 (rs738409[G], encoding I148M) was strongly associated with increased hepatic fat levels (P = 5.9 x 10(-10)) and with hepatic inflammation (P = 3.7 x 10(-4)). The allele was most common in Hispanics, the group most susceptible to NAFLD; hepatic fat content was more than twofold higher in PNPLA3 rs738409[G] homozygotes than in noncarriers. Resequencing revealed another allele of PNPLA3 (rs6006460[T], encoding S453I) that was associated with lower hepatic fat content in African Americans, the group at lowest risk of NAFLD. Thus, variation in PNPLA3 contributes to ancestry-related and inter-individual differences in hepatic fat content and susceptibility to NAFLD.
C1 [Romeo, Stefano; Xing, Chao; Pertsemlidis, Alexander; Cohen, Jonathan C.; Hobbs, Helen H.] Univ Texas SW Med Ctr Dallas, Donald W Reynolds Cardiovasc Clin Res Ctr, Eugene McDermott Ctr Human Growth & Dev, Dallas, TX 75390 USA.
[Kozlitina, Julia; Xing, Chao] Univ Texas SW Med Ctr Dallas, Dept Clin Sci, Dallas, TX 75390 USA.
[Kozlitina, Julia] So Methodist Univ, Dept Stat Sci, Dallas, TX 75275 USA.
[Cox, David] Perlegen Sci, Mountain View, CA 94043 USA.
[Pennacchio, Len A.] Lawrence Berkeley Natl Lab, Genom Div, Berkeley, CA 94720 USA.
[Pennacchio, Len A.] US Dept Energy Joint Genome Inst, Walnut Creek, CA 94598 USA.
[Boerwinkle, Eric] Univ Texas Hlth Sci Ctr, Ctr Human Genet, Houston, TX 77030 USA.
[Boerwinkle, Eric] Univ Texas Hlth Sci Ctr, Inst Mol Med, Houston, TX 77030 USA.
[Hobbs, Helen H.] Univ Texas SW Med Ctr Dallas, Howard Hughes Med Inst, Dallas, TX 75390 USA.
RP Hobbs, HH (reprint author), Univ Texas SW Med Ctr Dallas, Donald W Reynolds Cardiovasc Clin Res Ctr, Eugene McDermott Ctr Human Growth & Dev, 6000 Harry Hines Blvd Dallas, Dallas, TX 75390 USA.
EM jonathan.cohen@utsouthwestern.edu; helen.hobbs@utsouthwestern.edu
RI Romeo, Stefano/L-6861-2015;
OI Romeo, Stefano/0000-0001-9168-4898; Pertsemlidis,
Alexander/0000-0003-1624-9372
FU Donald W. Reynolds Foundation; US National Institutes of Health
[RL1HL-092550, 1PL1DK081182, HL-20948]; US National Heart, Lung, and
Blood Institute (NHLBI) Program for Genomic Applications [HL-066681]; US
Department of Energy [DE-AC02-05CH11231]
FX We thank T. Hyatt, J. Martin, W. Schackwitz, A. Ustaszewska, C. Wright
and the team at Perlegen Sciences for technical assistance. We thank K.
Lawson for the statistical analysis of the data from the ARIC study. We
thank J. Horton and D. Hinds for helpful discussions. We are grateful to
the staff and participants of the Dallas Heart Study and the
Atherosclerosis Risk in Communities Study for their contributions. This
work was supported by grants from the Donald W. Reynolds Foundation, the
US National Institutes of Health (RL1HL-092550, 1PL1DK081182 and
HL-20948), the US National Heart, Lung, and Blood Institute (NHLBI)
Program for Genomic Applications (HL-066681) and the US Department of
Energy (Contract DE-AC02-05CH11231).
NR 29
TC 883
Z9 903
U1 7
U2 34
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 1061-4036
J9 NAT GENET
JI Nature Genet.
PD DEC
PY 2008
VL 40
IS 12
BP 1461
EP 1465
DI 10.1038/ng.257
PG 5
WC Genetics & Heredity
SC Genetics & Heredity
GA 376XI
UT WOS:000261215900023
PM 18820647
ER
PT J
AU Shan, ZW
Adesso, G
Cabot, A
Sherburne, MP
Asif, SAS
Warren, OL
Chrzan, DC
Minor, AM
Alivisatos, AP
AF Shan, Z. W.
Adesso, G.
Cabot, A.
Sherburne, M. P.
Asif, S. A. Syed
Warren, O. L.
Chrzan, D. C.
Minor, A. M.
Alivisatos, A. P.
TI Ultrahigh stress and strain in hierarchically structured hollow
nanoparticles
SO NATURE MATERIALS
LA English
DT Article
ID MOLECULAR-DYNAMICS SIMULATION; NANOCRYSTALLINE MATERIALS;
MECHANICAL-BEHAVIOR; SILICON NANOSPHERES; TENSILE DUCTILITY;
DEFORMATION; METALS; NANOINDENTATION; PLASTICITY; NANOSCALE
AB Nanocrystalline materials offer very high strength but are typically limited in their strain to failure, and efforts to improve deformability in these materials are usually found to be at the expense of strength. Using a combination of quantitative in situ compression in a transmission electron microscope and finite-element analysis, we show that the mechanical properties of nanoparticles can be directly measured and interpreted on an individual basis. We find that nanocrystalline CdS synthesized into a spherical shell geometry is capable of withstanding extreme stresses (approaching the ideal shear strength of CdS). This unusual strength enables the spherical shells to exhibit considerable deformation to failure (up to 20% of the sphere's diameter). By taking into account the structural hierarchy intrinsic to novel nanocrystalline materials such as this, we show it is possible to achieve and characterize the ultrahigh stresses and strains that exist within a single nanoparticle during deformation.
C1 [Shan, Z. W.; Minor, A. M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
[Shan, Z. W.; Cabot, A.; Chrzan, D. C.; Minor, A. M.; Alivisatos, A. P.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Shan, Z. W.; Asif, S. A. Syed; Warren, O. L.] Hysitron Inc, Minneapolis, MN 55344 USA.
[Adesso, G.; Cabot, A.; Alivisatos, A. P.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Sherburne, M. P.; Chrzan, D. C.; Minor, A. M.; Alivisatos, A. P.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
RP Minor, AM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
EM aminor@berkeley.edu
RI Shan, Zhiwei/B-8799-2014; andreu, cabot/B-5683-2014; Alivisatos , Paul
/N-8863-2015;
OI Alivisatos , Paul /0000-0001-6895-9048; cabot, andreu
/0000-0002-7533-3251
FU Director, Office of Science, Office of Basic Energy Sciences (BES); US
Department of Energy; SBIR Phase II [DE-FG02-04ER83979]; DOE; Materials
Science and Engineering Division of BES; Scientific User Facilities
Division of BES [DE-AC02-05CH11231]; National Science Foundation [DMR
0304629]
FX This work was supported by the Director, Office of Science, Office of
Basic Energy Sciences (BES), of the US Department of Energy. The in situ
experiments and development of the holder were supported by SBIR Phase
II grant DE-FG02-04ER83979 awarded to Hysitron, Inc. (DOE support of
this project does not constitute an endorsement by DOE of the views
expressed in this article). Synthesis of the materials was supported by
the Materials Science and Engineering Division of BES and the in situ
experiments and TEM work were supported by the Scientific User
Facilities Division of BES, both under Contract No. DE-AC02-05CH11231.
Modelling and theory were supported by the National Science Foundation
under Grant No. DMR 0304629. This article is dedicated to the memory of
our young colleague in this project, G. A., who was tragically killed in
a car accident.
NR 27
TC 123
Z9 125
U1 14
U2 124
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 DEC
PY 2008
VL 7
IS 12
BP 947
EP 952
DI 10.1038/nmat2295
PG 6
WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 375PZ
UT WOS:000261127100015
PM 18931673
ER
PT J
AU Zhao, J
Huang, Q
de la Cruz, C
Li, SL
Lynn, JW
Chen, Y
Green, MA
Chen, GF
Li, G
Li, Z
Luo, JL
Wang, NL
Dai, PC
AF Zhao, Jun
Huang, Q.
de la Cruz, Clarina
Li, Shiliang
Lynn, J. W.
Chen, Y.
Green, M. A.
Chen, G. F.
Li, G.
Li, Z.
Luo, J. L.
Wang, N. L.
Dai, Pengcheng
TI Structural and magnetic phase diagram of CeFeAsO(1-x)F(x) and its
relation to high-temperature superconductivity
SO NATURE MATERIALS
LA English
DT Article
AB Recently, high-transition-temperature (high-T(c)) superconductivity was discovered in the iron pnictide RFeAsO(1-x)F(x) (R, rare-earth metal) family of materials. We use neutron scattering to study the structural and magnetic phase transitions in CeFeAsO(1-x)F(x) as the system is tuned from a semimetal to a high-T(c) superconductor through fluorine (F) doping, x. In the undoped state, CeFeAsO develops a structural lattice distortion followed by a collinear antiferromagnetic order with decreasing temperature. With increasing fluorine doping, the structural phase transition decreases gradually and vanishes within the superconductivity dome near x D 0 : 10, whereas the antiferromagnetic order is suppressed before the appearance of superconductivity for x > 0.06, resulting in an electronic phase diagram remarkably similar to that of the high-T(c) copper oxides. Comparison of the structural evolution of CeFeAsO(1-x)F(x) with other Fe-based superconductors suggests that the structural perfection of the Fe-As tetrahedron is important for the high-T(c) superconductivity in these Fe pnictides.
C1 [Zhao, Jun; de la Cruz, Clarina; Li, Shiliang; Dai, Pengcheng] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Huang, Q.; Lynn, J. W.; Chen, Y.; Green, M. A.] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[de la Cruz, Clarina; Dai, Pengcheng] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
[Chen, Y.; Green, M. A.] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA.
[Chen, G. F.; Li, G.; Li, Z.; Luo, J. L.; Wang, N. L.] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China.
RP Dai, PC (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
EM daip@ornl.gov
RI Li, Shiliang/B-9379-2009; Zhao, Jun/A-2492-2010; Dai, Pengcheng
/C-9171-2012; li, zheng/F-5189-2012; dela Cruz, Clarina/C-2747-2013; Li,
Gang/E-3033-2015
OI Zhao, Jun/0000-0002-0421-8934; Dai, Pengcheng /0000-0002-6088-3170; dela
Cruz, Clarina/0000-0003-4233-2145;
FU US National Science Foundation [DMR-0756568]; US Department of Energy,
Division of Materials Science, Basic Energy Sciences [DOE
DE-FG02-05ER46202]; US Department of Energy, Division of Scientific User
Facilities, Basic Energy Sciences; National Science Foundation of China;
Chinese Academy of Sciences ITSNEM; Ministry of Science and Technology
of China
FX We thank E. Dagotto, A. Moreo, R. Fishman and T. Maier for helpful
discussions. We also thank J.L.Zarestky for his help on the HB-3
measurements. This work is supported by the US National Science
Foundation through DMR-0756568 and by the US Department of Energy,
Division of Materials Science, Basic Energy Sciences, through DOE
DE-FG02-05ER46202. This work is also supported in part by the US
Department of Energy, Division of Scientific User Facilities, Basic
Energy Sciences. The work at the Institute of Physics, Chinese Academy
of Sciences, is supported by the National Science Foundation of China,
the Chinese Academy of Sciences ITSNEM and the Ministry of Science and
Technology of China.
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U1 14
U2 151
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 DEC
PY 2008
VL 7
IS 12
BP 953
EP 959
DI 10.1038/nmat2315
PG 7
WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 375PZ
UT WOS:000261127100016
PM 18953342
ER
PT J
AU Saiz, EG
Gregori, G
Gericke, DO
Vorberger, J
Barbrel, B
Clarke, RJ
Freeman, RR
Glenzer, SH
Khattak, FY
Koenig, M
Landen, OL
Neely, D
Neumayer, P
Notley, MM
Pelka, A
Price, D
Roth, M
Schollmeier, M
Spindloe, C
Weber, RL
van Woerkom, L
Wunsch, K
Riley, D
AF Saiz, E. Garcia
Gregori, G.
Gericke, D. O.
Vorberger, J.
Barbrel, B.
Clarke, R. J.
Freeman, R. R.
Glenzer, S. H.
Khattak, F. Y.
Koenig, M.
Landen, O. L.
Neely, D.
Neumayer, P.
Notley, M. M.
Pelka, A.
Price, D.
Roth, M.
Schollmeier, M.
Spindloe, C.
Weber, R. L.
van Woerkom, L.
Wuensch, K.
Riley, D.
TI Probing warm dense lithium by inelastic X-ray scattering
SO NATURE PHYSICS
LA English
DT Article
ID INITIO MOLECULAR-DYNAMICS; AUGMENTED-WAVE METHOD; LIQUID-METALS;
PLASMAS; SIMULATION; FUSION
AB One of the grand challenges of contemporary physics is understanding strongly interacting quantum systems comprising such diverse examples as ultracold atoms in traps, electrons in high-temperature superconductors and nuclear matter(1). Warm dense matter, defined by temperatures of a few electron volts and densities comparable with solids, is a complex state of such interacting matter(2). Moreover, the study of warm dense matter states has practical applications for controlled thermonuclear fusion, where it is encountered during the implosion phase(3), and it also represents laboratory analogues of astrophysical environments found in the core of planets and the crusts of old stars(4,5). Here we demonstrate how warm dense matter states can be diagnosed and structural properties can be obtained by inelastic X-ray scattering measurements on a compressed lithium sample. Combining experiments and ab initio simulations enables us to determine its microscopic state and to evaluate more approximate theoretical models for the ionic structure.
C1 [Gregori, G.] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England.
[Saiz, E. Garcia; Riley, D.] Queens Univ Belfast, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland.
[Gregori, G.; Clarke, R. J.; Neely, D.; Notley, M. M.; Spindloe, C.] Rutherford Appleton Lab, Cent Laser Facil, Didcot OX11 0QX, Oxon, England.
[Gericke, D. O.; Vorberger, J.; Wuensch, K.] Univ Warwick, Dept Phys, Ctr Fus Space & Astrphys, Coventry CV4 7AL, W Midlands, England.
[Barbrel, B.; Koenig, M.] Univ Paris 06, Ecole Polytech, Lab Utilisat Laser Intenses, F-91128 Palaiseau, France.
[Freeman, R. R.; Weber, R. L.; van Woerkom, L.] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
[Glenzer, S. H.; Landen, O. L.; Neumayer, P.; Price, D.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Khattak, F. Y.] Kohat Univ Sci & Technol, Dept Phys, Kohat 26000, NWFP, Pakistan.
[Pelka, A.; Roth, M.; Schollmeier, M.] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany.
RP Gregori, G (reprint author), Univ Oxford, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England.
EM g.gregori1@physics.ox.ac.uk
RI Vorberger, Jan/D-9162-2015; Koenig, Michel/A-2167-2012; Schollmeier,
Marius/H-1056-2012; KHATTAK, Fida Younus/L-2404-2015
OI Schollmeier, Marius/0000-0002-0683-022X;
FU EPSRC; Science and Technology Facilities Council of the United Kingdom;
US DOE; Lawrence Livermore National Laboratory
FX This work was partially supported by EPSRC grants and by the Science and
Technology Facilities Council of the United Kingdom. Additional support
from the US DOE and the Lawrence Livermore National Laboratory is also
acknowledged. We thank the Vulcan operation, engineering and target
fabrication groups for their support during the experiment.
NR 30
TC 99
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U1 3
U2 31
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1745-2473
EI 1745-2481
J9 NAT PHYS
JI Nat. Phys.
PD DEC
PY 2008
VL 4
IS 12
BP 940
EP 944
DI 10.1038/nphys1103
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 379GZ
UT WOS:000261386000016
ER
PT J
AU Allshire, RC
Karpen, GH
AF Allshire, Robin C.
Karpen, Gary H.
TI Epigenetic regulation of centromeric chromatin: old dogs, new tricks?
SO NATURE REVIEWS GENETICS
LA English
DT Review
ID CENP-A CHROMATIN; NUCLEOSOME ASSEMBLY PATHWAYS; FISSION YEAST;
CELL-CYCLE; HISTONE H3; IN-VITRO; SACCHAROMYCES-CEREVISIAE; STRUCTURAL
DETERMINANTS; FUNCTIONAL CENTROMERES; COMPREHENSIVE ANALYSIS
AB The assembly of just a single kinetochore at the centromere of each sister chromatid is essential for accurate chromosome segregation during cell division. Surprisingly, despite their vital function, centromeres show considerable plasticity with respect to their chromosomal locations and activity. The establishment and maintenance of centromeric chromatin, and therefore the location of kinetochores, is epigenetically regulated. The histone H3 variant CENP-A is the key determinant of centromere identity and kinetochore assembly. Recent studies have identified many factors that affect CENP-A localization, but their precise roles in this process are unknown. We build on these advances and on new information about the timing of CENP-A assembly during the cell cycle to propose new models for how centromeric chromatin is established and propagated.
C1 [Allshire, Robin C.] Univ Edinburgh, Wellcome Trust Ctr Cell Biol, Inst Cell Biol, Sch Biol Sci, Edinburgh EH9 3JR, Midlothian, Scotland.
[Karpen, Gary H.] Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Genome & Computat Biol, Berkeley, CA 94720 USA.
[Karpen, Gary H.] Univ Calif Berkeley, Dept Mol Cell Biol, Berkeley, CA 94720 USA.
RP Allshire, RC (reprint author), Univ Edinburgh, Wellcome Trust Ctr Cell Biol, Inst Cell Biol, Sch Biol Sci, 6-34 Swann Bldg,Mayfield Rd, Edinburgh EH9 3JR, Midlothian, Scotland.
EM robin.allshire@ed.ac.uk; karpen@fruitfly.org
FU NIGMS NIH HHS [R01 GM066272, R01 GM066272-05]; Wellcome Trust [065061/Z,
065061]
NR 124
TC 275
Z9 279
U1 6
U2 22
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1471-0056
J9 NAT REV GENET
JI Nat. Rev. Genet.
PD DEC
PY 2008
VL 9
IS 12
BP 923
EP 937
DI 10.1038/nrg2466
PG 15
WC Genetics & Heredity
SC Genetics & Heredity
GA 374IO
UT WOS:000261037200011
PM 19002142
ER
PT J
AU Singer, AU
Rohde, JR
Lam, R
Skarina, T
Kagan, O
DiLeo, R
Chirgadze, NY
Cuff, ME
Joachimiak, A
Tyers, M
Sansonetti, PJ
Parsot, C
Savchenko, A
AF Singer, Alexander U.
Rohde, John R.
Lam, Robert
Skarina, Tatiana
Kagan, Olga
DiLeo, Rosa
Chirgadze, Nickolay Y.
Cuff, Marianne E.
Joachimiak, Andrzej
Tyers, Mike
Sansonetti, Philippe J.
Parsot, Claude
Savchenko, Alexei
TI Structure of the Shigella T3SS effector IpaH defines a new class of E3
ubiquitin ligases
SO NATURE STRUCTURAL & MOLECULAR BIOLOGY
LA English
DT Article
ID III SECRETION APPARATUS; SACCHAROMYCES-CEREVISIAE; CONJUGATING ENZYMES;
REFINEMENT; MODEL; SPECIFICITY; PROTEINS; FLEXNERI; EXPRESSION; IMMUNITY
AB IpaH proteins are E3 ubiquitin ligases delivered by the type III secretion apparatus into host cells upon infection of humans by the Gram-negative pathogen Shigella flexneri. These proteins comprise a variable leucine-rich repeat-containing N-terminal domain and a conserved C-terminal domain harboring an invariant cysteine residue that is crucial for activity. IpaH homologs are encoded by diverse animal and plant pathogens. Here we demonstrate that the IpaH C-terminal domain carries the catalytic activity for ubiquitin transfer and that the N-terminal domain carries the substrate specificity. The structure of the IpaH C-terminal domain, determined to 2.65-A resolution, represents an all-helical fold bearing no resemblance to previously defined E3 ubiquitin ligases. The conserved and essential cysteine residue lies on a flexible, surface-exposed loop surrounded by conserved acidic residues, two of which are crucial for IpaH activity.
C1 [Singer, Alexander U.; Skarina, Tatiana; Kagan, Olga; DiLeo, Rosa; Savchenko, Alexei] Univ Toronto, Ontario Ctr Struct Prote, Midwest Ctr Struct Prote, Banting & Best Dept Med Res,CH Best Inst, Toronto, ON M5G 1L5, Canada.
[Rohde, John R.; Tyers, Mike] Mt Sinai Hosp, Samuel Lunenfeld Res Inst, Toronto, ON M5G 1X5, Canada.
[Lam, Robert; Chirgadze, Nickolay Y.] Ontario Canc Inst, Toronto, ON M5G 2C4, Canada.
[Chirgadze, Nickolay Y.] Univ Toronto, Dept Pharmacol & Toxicol, Toronto, ON M5S 1A8, Canada.
[Cuff, Marianne E.; Joachimiak, Andrzej] Argonne Natl Lab, Midwest Ctr Struct Genom, Argonne, IL 60439 USA.
[Cuff, Marianne E.; Joachimiak, Andrzej] Argonne Natl Lab, Struct Biol Ctr, Argonne, IL 60439 USA.
[Sansonetti, Philippe J.; Parsot, Claude] Inst Pasteur, Unite Pathogenie Microbienne Mol, F-75724 Paris 15, France.
[Sansonetti, Philippe J.; Parsot, Claude] INSERM, U786, F-75724 Paris 15, France.
RP Savchenko, A (reprint author), Univ Toronto, Ontario Ctr Struct Prote, Midwest Ctr Struct Prote, Banting & Best Dept Med Res,CH Best Inst, Room 24,112 Coll St, Toronto, ON M5G 1L5, Canada.
EM alexei.savchenko@utoronto.ca
RI Rohde, John/F-1479-2013
FU US National Institutes of Health [GM62414-01]; Ontario Research and
Development Challenge Fund; Canadian Institutes of Health Research;
Canadian Institutes of Health Research [MT012466, MOP- 57795]; National
Cancer Institute of Canada; Royal Society and the Scottish Universities
Life Sciences Alliance
FX We wish to thank the staff at the Argonne National Laboratory beam line
19- ID for assistance with data collection and A. Edwards for critical
reading of the manuscript. We also wish to thank S. Dhe- Paganon and G.
Avvakumov at the Structural Genomics Consortium, Toronto, for providing
the collection of expression constructs for human E2- conjugating
enzymes. We thank D. Briant for insight to E3 ubiquitination assays.
This work was supported by US National Institutes of Health Grants
GM62414- 01, by the Ontario Research and Development Challenge Fund and
by a grant from the Canadian Institutes of Health Research Grant. M. T.
is supported by grants from the Canadian Institutes of Health Research
(MT012466 and MOP- 57795), the National Cancer Institute of Canada, the
Royal Society and the Scottish Universities Life Sciences Alliance.
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U1 3
U2 8
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 1545-9985
J9 NAT STRUCT MOL BIOL
JI Nat. Struct. Mol. Biol.
PD DEC
PY 2008
VL 15
IS 12
BP 1293
EP 1301
DI 10.1038/nsmb.1511
PG 9
WC Biochemistry & Molecular Biology; Biophysics; Cell Biology
SC Biochemistry & Molecular Biology; Biophysics; Cell Biology
GA 379GE
UT WOS:000261383900016
PM 18997778
ER
PT J
AU Xu, Z
Page, RC
Gomes, MM
Kohli, E
Nix, JC
Herr, AB
Patterson, C
Misra, S
AF Xu, Zhen
Page, Richard C.
Gomes, Michelle M.
Kohli, Ekta
Nix, Jay C.
Herr, Andrew B.
Patterson, Cam
Misra, Saurav
TI Structural basis of nucleotide exchange and client binding by the Hsp70
cochaperone Bag2
SO NATURE STRUCTURAL & MOLECULAR BIOLOGY
LA English
DT Article
ID HEAT-SHOCK-PROTEIN; CRYSTAL-STRUCTURE; QUATERNARY STRUCTURE; CHAPERONE;
CHIP; SOFTWARE; NMR; DEGRADATION; MECHANISM; FRAGMENT
AB Cochaperones are essential for Hsp70-and Hsc70-mediated folding of proteins and include nucleotide-exchange factors (NEFs) that assist protein folding by accelerating ADP-ATP exchange on Hsp70. The cochaperone Bag2 binds misfolded Hsp70 clients and also acts as an NEF, but the molecular basis for its function is unclear. We show that, rather than being a member of the Bag domain family, Bag2 contains a new type of Hsp70 NEF domain, which we call the 'brand new bag' (BNB) domain. Free and Hsc70-bound crystal structures of Bag2-BNB show its dimeric structure, in which a flanking linker helix and loop bind to Hsc70 to promote nucleotide exchange. NMR analysis demonstrates that the client binding sites and Hsc70-interaction sites of the Bag2-BNB overlap, and that Hsc70 can displace clients from Bag2-BNB, indicating a distinct mechanism for the regulation of Hsp70-mediated protein folding by Bag2.
C1 [Xu, Zhen; Page, Richard C.; Kohli, Ekta; Misra, Saurav] Cleveland Clin, Lerner Res Inst, Dept Mol Cardiol, Cleveland, OH 44195 USA.
[Gomes, Michelle M.; Herr, Andrew B.] Univ Cincinnati, Coll Med, Dept Mol Genet Biochem & Microbiol, Cincinnati, OH 45267 USA.
[Nix, Jay C.] Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Biol Consortium, Berkeley, CA 94720 USA.
[Patterson, Cam] Univ N Carolina, Carolina Cardiovasc Biol Ctr, Chapel Hill, NC 27599 USA.
[Patterson, Cam] Univ N Carolina, Dept Pharmacol, Chapel Hill, NC 27599 USA.
[Patterson, Cam] Univ N Carolina, Dept Cell & Dev Biol, Chapel Hill, NC 27599 USA.
[Patterson, Cam] Univ N Carolina, Dept Med, Chapel Hill, NC 27599 USA.
RP Misra, S (reprint author), Cleveland Clin, Lerner Res Inst, Dept Mol Cardiol, NB50,9500 Euclid Ave, Cleveland, OH 44195 USA.
EM misras@ccf.org
OI Misra, Saurav/0000-0002-1385-8554; Herr, Andrew/0000-0002-3598-3399;
Page, Richard/0000-0002-3006-3171
FU NIGMS NIH HHS [R01 GM080271, R01 GM061728, R01-GM61728, R01-GM080271,
R01 GM080271-01A1]
NR 41
TC 38
Z9 39
U1 0
U2 9
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 1545-9985
J9 NAT STRUCT MOL BIOL
JI Nat. Struct. Mol. Biol.
PD DEC
PY 2008
VL 15
IS 12
BP 1309
EP 1317
DI 10.1038/nsmb.1518
PG 9
WC Biochemistry & Molecular Biology; Biophysics; Cell Biology
SC Biochemistry & Molecular Biology; Biophysics; Cell Biology
GA 379GE
UT WOS:000261383900018
PM 19029896
ER
PT J
AU Donald, PA
Patananan, AN
Cerna, CA
Simmons, T
Castro, N
Wilgar, JL
Goheen, C
AF Donald, P. A.
Patananan, A. N.
Cerna, C. A.
Simmons, T.
Castro, N.
Wilgar, J. L.
Goheen, C.
TI PROTEIN COMPARISON OF SOYBEAN CYST NEMATODE POPULATIONS USING SDS-PAGE
SO NEMATROPICA
LA English
DT Article
DE Heterodera glycines; SCN; variability
AB Soybean cyst nematode (SCN, Heterodera glycines) represents one of the most serious threats to predictable soybean yield in the United States. Originally discovered in North Carolina during 1954, intraspecific SCN population variability was soon noted. To reduce SCN crop damage, multiple agriculture techniques have been exploited. Of these, resistant varieties and rotation to non host crops have been the most effective in reducing the SCN egg population density. However, no single strategy is effective due to variation in SCN populations, lack of complete resistance, and economics of non host crop production. Although it is well accepted that dissimilarities in virulence phenotypes are not associated with any morphological distinctions, knowledge of biochemical characterization of SCN populations is lacking. Therefore, the protein profiles of eggs from four SCN populations were differentiated using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). Out of 25 protein bands ranging in molecular weight from 40 to 200 kDa, no differences were observed among any of the populations. These results suggest that eggs from SCN populations differing in virulence phenotypes have similar proteins at the resolution of SDS-PAGE.
C1 [Donald, P. A.] ARS USDA CGRPU, Jackson, TN 38301 USA.
[Patananan, A. N.] Univ Calif Los Angeles, Dept Microbiol Immunol & Mol Genet, Los Angeles, CA USA.
[Cerna, C. A.; Simmons, T.; Castro, N.; Wilgar, J. L.; Goheen, C.] Battelle NW, Richland, WA 99352 USA.
RP Donald, PA (reprint author), ARS USDA CGRPU, 605 Airways Blvd, Jackson, TN 38301 USA.
EM pat.donald@ars.usda.gov
FU U.S. Department of Energy, Office of Science; Tennessee Soybean
Promotion Board
FX Thanks to the U.S. Department of Energy, Office of Science for support
through the Science Undergraduate Laboratory Internship (SULI) program
and to Tennessee Soybean Promotion Board for partial funding. Thanks to
Karen Wieda, Royace Aikin, and Dale Johns as well as Rick Zanger for use
of equipment and to Barb Michaud, Gordon White, and David Lane for
technical and greenhouse assistance.
NR 31
TC 0
Z9 0
U1 0
U2 2
PU ORGANIZATION TROP AMER NEMATOLOGISTS
PI AUBURN
PA AUBURN UNIV DEPT PLANT PATHOLOGY, AUBURN, AL 36849 USA
SN 0099-5444
J9 NEMATROPICA
JI Nematropica
PD DEC
PY 2008
VL 38
IS 2
BP 137
EP 144
PG 8
WC Zoology
SC Zoology
GA V10PP
UT WOS:000207476200004
ER
PT J
AU Fowler, JS
Volkow, ND
Logan, J
Alexoff, D
Telang, F
Wang, GJ
Wong, C
Ma, YM
Kriplani, A
Pradhan, K
Schlyer, D
Jayne, M
Hubbard, B
Carter, P
Warner, D
King, P
Shea, C
Xu, YW
Muench, L
Apelskog, K
AF Fowler, Joanna S.
Volkow, Nora D.
Logan, Jean
Alexoff, David
Telang, Frank
Wang, Gene-Jack
Wong, Christopher
Ma, Yeming
Kriplani, Aarti
Pradhan, Kith
Schlyer, David
Jayne, Millard
Hubbard, Barbara
Carter, Pauline
Warner, Donald
King, Payton
Shea, Colleen
Xu, Youwen
Muench, Lisa
Apelskog, Karen
TI Fast uptake and long-lasting binding of methamphetamine in the human
brain: Comparison with cocaine
SO NEUROIMAGE
LA English
DT Article
ID DOPAMINE TRANSPORTER; NEUROTOXICITY; ABUSERS; PHARMACOKINETICS; RATS;
MICE; PET; AMPHETAMINE; ADDICTION; EXPOSURE
AB Methamphetamine is one of the most addictive and neurotoxic drugs of abuse. It produces large elevations in extracellular dopamine in the striatum through vesicular release and inhibition of the dopamine transporter. In the U. S. abuse prevalence varies by ethnicity with very low abuse among African Americans relative to Caucasians, differentiating it from cocaine where abuse rates are similar for the two groups. Here we report the first comparison of methamphetamine and cocaine pharmacokinetics in brain between Caucasians and African Americans along with the measurement of dopamine transporter availability in striatum. Methamphetamine's uptake in brain was fast (peak uptake at 9 min) with accumulation in cortical and subcortical brain regions and in white matter. Its clearance from brain was slow (except for white matter which did not clear over the 90 min) and there was no difference in pharmacokinetics between Caucasians and African Americans. In contrast cocaine's brain uptake and clearance were both fast, distribution was predominantly in striatum and uptake was higher in African Americans. Among individuals, those with the highest striatal (but not cerebellar) methamphetamine accumulation also had the highest dopamine transporter availability suggesting a relationship between METH exposure and DAT availability. Methamphetamine's fast brain uptake is consistent with its highly reinforcing effects, its slow clearance with its long-lasting behavioral effects and its widespread distribution with its neurotoxic effects that affect not only striatal but also cortical and white matter regions. The absence of significant differences between Caucasians and African Americans suggests that variables other than methamphetamine pharmacokinetics and bioavailability account for the lower abuse prevalence in African Americans. (C) 2008 Elsevier Inc. All rights reserved.
C1 [Fowler, Joanna S.; Logan, Jean; Alexoff, David; Wang, Gene-Jack; Wong, Christopher; Schlyer, David; Hubbard, Barbara; Carter, Pauline; Warner, Donald; King, Payton; Shea, Colleen; Xu, Youwen; Apelskog, Karen] Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA.
[Fowler, Joanna S.; Wang, Gene-Jack] Mt Sinai Sch Med, New York, NY 10029 USA.
[Fowler, Joanna S.] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
[Volkow, Nora D.] Natl Inst Drug Abuse, Bethesda, MD 20892 USA.
[Volkow, Nora D.; Telang, Frank; Ma, Yeming; Jayne, Millard; Muench, Lisa] NIAAA, Bethesda, MD 20892 USA.
[Kriplani, Aarti; Schlyer, David] SUNY Stony Brook, Dept Biomed Engn, Stony Brook, NY 11974 USA.
[Kriplani, Aarti; Schlyer, David] SUNY Stony Brook, Dept Appl Math & Stat, Stony Brook, NY 11974 USA.
RP Fowler, JS (reprint author), Brookhaven Natl Lab, Dept Med, Bldg 555, Upton, NY 11973 USA.
EM fowler@bnl.gov
OI Logan, Jean/0000-0002-6993-9994
FU Brookhaven National Laboratory [DE-AC02-98CH10886]; U.S. Department of
Energy; Office of Biological and Environmental Research; NIH
[K05DA020001]; NIAAA Intramural program; GCRC [MO1RR10710.]
FX This research was carried out at Brookhaven National Laboratory under
contract DE-AC02-98CH10886 with the U.S. Department of Energy and
supported by its Office of Biological and Environmental Research and by
NIH K05DA020001, the NIAAA Intramural program by GCRC grant #MO1RR10710.
We are grateful to Richard Ferrieri and Michael Schueller for cyclotron
and laboratory operations and to Anat Biegon for helpful discussions. We
also thank the individuals who volunteered for these studies.
NR 36
TC 43
Z9 44
U1 2
U2 7
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1053-8119
J9 NEUROIMAGE
JI Neuroimage
PD DEC
PY 2008
VL 43
IS 4
BP 756
EP 763
DI 10.1016/j.neuroimage.2008.07.020
PG 8
WC Neurosciences; Neuroimaging; Radiology, Nuclear Medicine & Medical
Imaging
SC Neurosciences & Neurology; Radiology, Nuclear Medicine & Medical Imaging
GA 392KA
UT WOS:000262300400011
PM 18708148
ER
PT J
AU Geist, DR
Murray, CJ
Hanrahan, TP
Xie, YL
AF Geist, David R.
Murray, Christopher J.
Hanrahan, Timothy P.
Xie, Yulong
TI A Model of the Effects of Flow Fluctuations on Fall Chinook Salmon
Spawning Habitat Availability in the Columbia River
SO NORTH AMERICAN JOURNAL OF FISHERIES MANAGEMENT
LA English
DT Article
ID HANFORD REACH; BROWN TROUT; DISCHARGE; CHUM
AB The logistic regression models that we previously used to predict where fall Chinook salmon Oncorhynchus tshawytscha would spawn in the Hanford Reach of the Columbia River were based on so-called static variables (i.e., the riverbed surface substrate, riverbed slope, and time-averaged velocity and depth [representing the velocity and depth in each cell associated with the 50% exceedance flow]). Not all habitat predicted to be used for spawning contained redds, and one explanation for the overprediction is that the models did not incorporate streamflow fluctuation. Streamflow fluctuation occurs daily in the Hanford Reach owing to load-following operations (power generation to meet short-term electrical demand) at Priest Rapids Dam, a hydroelectric darn located at the upper end of the reach. Daily flow fluctuations could change the hydraulic characteristics to which fall Chinook salmon respond in selecting redd sites. The purpose of this study was to determine whether incorporating metrics of flow variability would improve modeling of spawning habitat availability. Flow variability was represented by so-called dynamic variables (i.e.. the standard deviations of velocity and depth for each habitat cell over a 60-d time segment during the fall spawning period in 1994, 1995, and 2001). Both the static and dynamic models were correct at least 85% of the time in predicting habitat as spawning or nonspawning. However, incorporation of the dynamic variables into the logistic regression models reduced the amount of overpredicted habitat by 42% in 1994, 32% in 1995, and 25% in 2001. For example, the area predicted to be suitable but not used in 1994 decreased from 20.8 ha for the static model to 12.1 ha for the dynamic model for all sites combined; similar results were found for 1995 and 2001. This represents an improvement in our ability to accurately predict suitable fall Chinook salmon spawning habitat in the Hanford Reach of the Columbia River.
C1 [Geist, David R.; Murray, Christopher J.; Hanrahan, Timothy P.; Xie, Yulong] Pacific NW Natl Lab, Environm Sustainabil Div, Richland, WA 99352 USA.
RP Geist, DR (reprint author), Pacific NW Natl Lab, Environm Sustainabil Div, POB 999, Richland, WA 99352 USA.
EM david.geist@pnl.gov
RI Xie, Yulong/O-9322-2016
OI Xie, Yulong/0000-0001-5579-482X
FU Bonneville Power Administration; U.S. Department of Energys
[DE-AC05-76RL01830]
FX This project was funded by the Bonneville Power Administration through
the Columbia River Basin Fish and Wildlife Program. Debbie Docherty was
the contracting officer's technical representative and made this study
possible. Special thanks also go to Dana Ward and Roger Dirkes for
financial support provided through the U.S. Department of Energy's
Public Safety and Resource Protection Program. We thank the three
anonymous reviewers for the journal whose comments led to major
improvements in this paper. Walker and Associates (Seattle, Washington)
conducted the aerial photography and photograph processing in 2001. A
significant number of staff' from the Pacific Northwest. National
Laboratory assisted in fieldwork, data analysis, and report preparation.
While there are too many to list here, please know that your efforts
were critical to the completion of this study. The Pacific Northwest
National Laboratory is operated by Battelle for the U.S. Department of
Energy under contract DE-AC05-76RL01830.
NR 47
TC 1
Z9 2
U1 2
U2 12
PU AMER FISHERIES SOC
PI BETHESDA
PA 5410 GROSVENOR LANE SUITE 110, BETHESDA, MD 20814-2199 USA
SN 0275-5947
J9 N AM J FISH MANAGE
JI North Am. J. Fish Manage.
PD DEC
PY 2008
VL 28
IS 6
BP 1894
EP 1910
DI 10.1577/M07-074.1
PG 17
WC Fisheries
SC Fisheries
GA 477FS
UT WOS:000268504700024
ER
PT J
AU Salvatores, M
Palmiotti, G
Aliberti, G
Hiruta, H
McKnight, R
Oblozinsky, P
Yang, WS
AF Salvatores, M.
Palmiotti, G.
Aliberti, G.
Hiruta, H.
McKnight, R.
Oblozinsky, P.
Yang, W. S.
TI Needs and Issues of Covariance Data Application
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB Needs and issues related to covariance data application are provided and several examples axe given to show their impact on important design parameters that affects both the economic and the safety of advanced nuclear reactors.
C1 [Salvatores, M.; Palmiotti, G.; Hiruta, H.] Idaho Natl Lab, NSE Div, Idaho Falls, ID 83415 USA.
[Salvatores, M.; Aliberti, G.; McKnight, R.; Yang, W. S.] Argonne Natl Lab, NE Div, Argonne, IL 60439 USA.
[Salvatores, M.] CEA Cadarache, F-13108 St Paul Les Durance, France.
[Oblozinsky, P.] Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
RP Salvatores, M (reprint author), Idaho Natl Lab, NSE Div, 2525 Fremont Ave,POB 1625, Idaho Falls, ID 83415 USA.
EM massimo.salvatores@cea.fr
OI Yang, Won Sik/0000-0003-0734-6023
NR 16
TC 15
Z9 15
U1 0
U2 2
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2725
EP 2732
DI 10.1016/j.nds.2008.11.001
PG 8
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400002
ER
PT J
AU Griffin, PJ
AF Griffin, P. J.
TI Dosimetry User's Perspective on Covariance Needs
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB The dosimetry community has a critical need for covariance matrices to characterize tire uncertainty in the input nuclear data used in a range of applications. This need is growing more acute as the nuclear regulatory community increases the rigor with which dosimetry statements must be made and supported. This paper presents and prioritizes a set of needs that reflect the application of neutron dosimetry to the research reactor and commercial nuclear power industry.
C1 Sandia Natl Labs, Nucl Technol Dept, Albuquerque, NM 87185 USA.
RP Griffin, PJ (reprint author), Sandia Natl Labs, Nucl Technol Dept, POB 5800, Albuquerque, NM 87185 USA.
EM pjgriff@sandia.gov
NR 14
TC 2
Z9 2
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 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2733
EP 2738
DI 10.1016/j.nds.2008.11.002
PG 6
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400003
ER
PT J
AU Rearden, BT
Mueller, DE
AF Rearden, B. T.
Mueller, D. E.
TI Recent Use of Covariance Data for Criticality Safety Assessment
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB The TSUNAMI codes of the Oak Ridge National Laboratory SCALE code system were applied to a burnup credit application to demonstrate the use of sensitivity and uncertainty analysis with recent cross section covariance data for criticality safety code and data validation. The use of sensitivity and uncertainty analysis provides for the assessment of a defensible computational bias, bias uncertainty, and gap analysis for a complex system that otherwise could be assessed only through the use of expert judgment and conservative assumptions.
C1 [Rearden, B. T.; Mueller, D. E.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Rearden, BT (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM reardenb@ornl.gov
NR 13
TC 6
Z9 6
U1 0
U2 1
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2739
EP 2744
DI 10.1016/j.nds.2008.11.003
PG 6
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400004
ER
PT J
AU Aliberti, G
Yang, WS
McKnight, RD
AF Aliberti, G.
Yang, W. S.
McKnight, R. D.
TI Use of Covariance Data to Select Experiments Relevant to Target Systems
for GNEP
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB The relevance of selected experiments to specific GNEP target systems is investigated with the use, of representativity methods. In this approach, the similarity between the target system and selected experiments in connection with a response parameter of interest is quantitatively evaluated by comparing the sensitivity profiles of the response parameter with respect to the nuclear data in the two systems, filtered by the estimated covariance data.
C1 [Aliberti, G.; Yang, W. S.; McKnight, R. D.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Aliberti, G (reprint author), Argonne Natl Lab, 9700 S Cass Ave,Bldg 208, Argonne, IL 60439 USA.
EM aliberti@anl.gov
OI Yang, Won Sik/0000-0003-0734-6023
NR 19
TC 5
Z9 5
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 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2745
EP 2751
DI 10.1016/j.nds.2008.11.004
PG 7
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400005
ER
PT J
AU Herman, M
Pigni, MT
Oblozinsky, P
Mughabghab, SF
Mattoon, CM
Capote, R
Cho, YS
Trkov, A
AF Herman, M.
Pigni, M. T.
Oblozinsky, P.
Mughabghab, S. F.
Mattoon, C. M.
Capote, R.
Cho, Young-Sik
Trkov, A.
TI Development of Covariance Capabilities in EMPIRE Code
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB The nuclear reaction code EMPIRE has been extended to provide evaluation capabilities for neutron cross section covariances in the thermal, resolved resonance, unresolved resonance and fast neutron regions. The Atlas of Neutron Resonances by Mughabghab is used as a primary source of information on uncertainties at low energies. Care is taken to ensure consistency among the resonance parameter uncertainties and those for thermal cross sections. The resulting resonance parameter covariances are formatted in the ENDF-6 File 32.
In the fast neutron range our methodology is based on model calculations with the code EMPIRE combined with experimental data through several available approaches. The model-based covariances can be obtained using deterministic (Kalman) or stochastic (Monte Carlo) propagation of model parameter uncertainties. We show that these two procedures yield comparable results. The Kalman filter and/or the generalized least square fitting procedures are employed to incorporate experimental information. We compare the two approaches analyzing results for the major reaction channels on (89)Y. We also discuss a long-standing issue of unreasonably low uncertainties and link it to the rigidity of the model.
C1 [Herman, M.; Pigni, M. T.; Oblozinsky, P.; Mughabghab, S. F.; Mattoon, C. M.] Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
[Capote, R.] IAEA, Nucl Data Sect, A-1400 Vienna, Austria.
[Cho, Young-Sik] KAERI, Taejon, South Korea.
[Trkov, A.] Jozef Stefan Inst, Ljubljana, Slovenia.
RP Herman, M (reprint author), Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
EM mwherman@bnl.gov
RI Capote Noy, Roberto/M-1245-2014
OI Capote Noy, Roberto/0000-0002-1799-3438
NR 17
TC 10
Z9 10
U1 1
U2 2
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2752
EP 2761
DI 10.1016/j.nds.2008.11.005
PG 10
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400006
ER
PT J
AU Capote, R
Smith, DL
AF Capote, Roberto
Smith, Donald L.
TI An Investigation of the Performance of the Unified Monte Carlo Method of
Neutron Cross Section Data Evaluation
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB The Unified Monte Carlo method (UMC) has been suggested to avoid certain limitations and approximations inherent to the well-known Generalized Least Squares (GLS) method of nuclear data evaluation. This contribution reports on an investigation of the performance of the UMC method in comparison with the GLS method. This is accomplished by applying both methods to simple examples with few input values that were selected to explore various features of the evaluation process that impact upon the quality of an evaluation. Among the issues explored are: i) convergence of UMC results with the number of Monte Carlo histories and the ranges of sampled values; ii) a comparison of Monte Carlo sampling using the Metropolis scheme and a brute force approach; iii) the effects of large data discrepancies; iv) the effects of large data uncertainties; v) the effects of strong or weak model or experimental data correlations; and vi) the impact of ratio data and integral data. Comparisons are also made of the evaluated results for these examples when the input values are first transformed to comparable logarithmic values prior to performing the evaluation. Some general conclusions that are applicable to more realistic evaluation exercises are offered.
C1 [Capote, Roberto] IAEA, Nucl Data Sect, A-1400 Vienna, Austria.
[Smith, Donald L.] Argonne Natl Lab, Coronado, CA 92118 USA.
RP Capote, R (reprint author), IAEA, Nucl Data Sect, POB 100,Wagramer Str 5, A-1400 Vienna, Austria.
EM Roberto.CapateNoy@iaea.org
RI Capote Noy, Roberto/M-1245-2014
OI Capote Noy, Roberto/0000-0002-1799-3438
NR 8
TC 27
Z9 27
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 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2768
EP 2773
DI 10.1016/j.nds.2008.11.007
PG 6
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400008
ER
PT J
AU Dietrich, FS
AF Dietrich, F. S.
TI Uncertainties in Measurements and Calculations of Nonelastic Cross
Sections
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
ID NEUTRON; U-238
AB Scatter in presently available measurements of the nonelastic cross section indicates that this quantity is rather poorly known (approximately 5-10%). We will show examples of this, together with results from a new technique that shows promise of reducing these uncertainties approximate to 2-3% in the range of a few MeV to a few tens of MeV. Comparison of results obtained using this new technique with calculations using various optical potentials suggests that such potentials are not reliable for predicting nonelastic cross sections to better than roughly 5%. In view of these results, we suggest that a limited set of high-precision measurements should be made to clarify the experimental picture and guide the further development of optical models.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Dietrich, FS (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA.
EM dietrich@llnl.gov
NR 15
TC 0
Z9 0
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 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2774
EP 2777
DI 10.1016/j.nds.2008.11.008
PG 4
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400009
ER
PT J
AU Wiarda, D
Arbanas, G
Leal, L
Dunn, ME
AF Wiarda, D.
Arbanas, G.
Leal, L.
Dunn, M. E.
TI Recent Advances with the AMPX Covariance Processing Capabilities in
PUFF-IV
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB The program PUFF-IV is used to process resonance parameter covariance information given in ENDF/B File 32 and point wise covariance matrices given in ENDF/B File 33 into group-averaged covariances matrices on a user-supplied group structure. For large resonance covariance matrices, found for example in (235)U, the execution time of PUFF-TV call be quite long. Recently the code was modified to take advantage of Basic Linear Algebra Subprograms (BLAS) routines for the most time-consuming matrix multiplications. This led to a substantial decrease in execution time. This faster processing capability allowed us to investigate the conversion of File 32 data into File 33 data using a larger number of user-defined groups. While conversion substantially reduces the ENDF/B file size requirements for evaluations with a large number of resonances, a trade-off is made between the number of groups used to represent the resonance parameter covariance as a point wise covariance matrix and the file size. We are also investigating a hybrid version of the conversion, in which the low-energy part of the File 32 resonance parameter covariances matrix is retained and the correlations with higher energies as well as the high energy part are given in File 33.
C1 [Wiarda, D.; Arbanas, G.; Leal, L.; Dunn, M. E.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Wiarda, D (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA.
EM wiardada@ornl.gov
NR 11
TC 14
Z9 14
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 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2791
EP 2795
DI 10.1016/j.nds.2008.11.011
PG 5
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400012
ER
PT J
AU Williams, ML
Rearden, BT
AF Williams, M. L.
Rearden, B. T.
TI SCALE-6 Sensitivity/Uncertainty Methods and Covariance Data
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB Computational methods and data used for sensitivity and uncertainty analysis within the SCALE nuclear analysis code system are presented. The methodology used to calculate sensitivity coefficients and similarity coefficients and to perform nuclear data adjustment is discussed. A description is provided of the SCALE-6 covariance library based oil ENDF/B-VII and other nuclear data evaluations, supplemented by "low- fidelity" approximate covariances.
C1 [Williams, M. L.; Rearden, B. T.] Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Williams, ML (reprint author), Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA.
EM williamsml@ornl.gov
NR 12
TC 19
Z9 19
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
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2796
EP 2800
DI 10.1016/j.nds.2008.11.012
PG 5
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400013
ER
PT J
AU Hiruta, H
Palmiotti, G
Salvatores, M
Arcilla, R
Oblozinsky, P
McKnight, RD
AF Hiruta, H.
Palmiotti, G.
Salvatores, M.
Arcilla, R., Jr.
Oblozinsky, P.
McKnight, R. D.
TI Few Group Collapsing of Covariance Matrix Data Based on a Conservation
Principle
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB A new algorithm for a rigorous collapsing of covariance data is proposed, derived, implemented, and tested. The method is based on a conservation principle that allows the uncertainty calculated in a fine group energy structure for a specific integral parameter; using as weights the associated sensitivity coefficients, to be preserved at a broad energy group structure.
C1 [Hiruta, H.; Palmiotti, G.; Salvatores, M.] Idaho Natl Lab, NSE Div, Idaho Falls, ID 83415 USA.
[Salvatores, M.] CEA Cadarache, F-13108 St Paul Les Durance, France.
[Arcilla, R., Jr.; Oblozinsky, P.] Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
[McKnight, R. D.] Argonne Natl Lab, NE Div, Argonne, IL 60439 USA.
RP Hiruta, H (reprint author), Idaho Natl Lab, NSE Div, 2525 Fremont Ave,POB 1625, Idaho Falls, ID 83415 USA.
EM Hikaru.Hiruta@inl.gov
NR 5
TC 4
Z9 4
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 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
SI SI
BP 2801
EP 2806
DI 10.1016/j.nds.2008.11.013
PG 6
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400014
ER
PT J
AU Hale, GM
AF Hale, G. M.
TI Covariances from Light-Element R-Matrix Analyses
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
ID SCATTERING CROSS SECTION; NEUTRON; CALIBRATION
AB We review the method for obtaining covariance information for light-element reactions using R-matrix theory. The general LANL R-matrix analysis code EDA provides accurate covariances for the resonance parameters at a solution due to the search algorithm it uses to find a local minimum of the chi-square surface. This information is used, together with analytically calculated sensitivity derivatives, in the first-order error propagation equation to obtain cross-section covariances; for all reactions included in the analysis. Examples are given of the covariances obtained front the EDA analyses for n-p scattering and for the n+(6)Li reactions used in the latest light-element standard cross section evaluation. Also discussed is a method of defining "pure theory" correlations that could be useful for extensions to higher energies and heavier systems.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Hale, GM (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM ghale@lanl.gov
NR 16
TC 12
Z9 12
U1 0
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
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2812
EP 2816
DI 10.1016/j.nds.2008.11.015
PG 5
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400016
ER
PT J
AU Kawano, T
Talou, P
Young, PG
Hale, G
Chadwick, MB
Little, RC
AF Kawano, T.
Talou, P.
Young, P. G.
Hale, G.
Chadwick, M. B.
Little, R. C.
TI Evaluation of Covariances for Actinides and Light Elements at LANL
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
ID NUCLEAR-DATA; ENDF/B-VII
AB Los Alamos evaluates covariances for the evaluated nuclear data library (ENDF), mainly for actinides above the resonance region and for light elements in the entire energy range. We also develop techniques to evaluate the covariance data., like Bayesian and least-squares fitting methods, which are important to explore the uncertainty information on different types of physical quantities such as elastic scattering angular distribution, or prompt neutron fission spectra. This paper summarizes our current activities of the covariance evaluation work at LANL, including the actinide and light element data mainly for criticality safety studies and transmutation technology. The Bayesian method based oil the Kalman filter technique, which combines uncertainties in the theoretical model and experimental data, is discussed.
C1 [Kawano, T.; Talou, P.; Young, P. G.; Hale, G.; Chadwick, M. B.; Little, R. C.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Kawano, T (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM kawano@lanl.gov
NR 20
TC 10
Z9 10
U1 0
U2 1
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2817
EP 2821
DI 10.1016/j.nds.2008.11.016
PG 5
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400017
ER
PT J
AU Pritychenko, B
Sonzogni, AA
AF Pritychenko, B.
Sonzogni, A. A.
TI Sigma: Web Retrieval Interface for Nuclear Reaction Data
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
ID DATA SERVICES
AB We present Sigma, a Web-rich application which provides user-friendly access in processing and plotting of the evaluated and experimental nuclear reaction data stored in the ENDF-6 and EXFOR formats. The main interface includes browsing using a periodic table and a directory tree, basic and advanced search capabilities, interactive plots of cross sections, angular distributions and spectra, comparisons between evaluated and experimental data, computations between different cross section sets. Interactive energy-angle, neutron cross section uncertainties plots and visualization of covariance matrices are under development. Sigma is publicly available at the National Nuclear Data Center website at http://www.nndc.bnl.gov/sigma.
C1 [Pritychenko, B.; Sonzogni, A. A.] Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
RP Pritychenko, B (reprint author), Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
EM pritychenko@bnl.gov
NR 15
TC 9
Z9 9
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 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2822
EP 2827
DI 10.1016/j.nds.2008.11.017
PG 6
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400018
ER
PT J
AU Little, RC
Kawano, T
Hale, GD
Pigni, MT
Herman, M
Oblozinsky, P
Williams, ML
Dunn, ME
Arbanas, G
Wiarda, D
McKnight, RD
McKamy, JN
Felty, JR
AF Little, R. C.
Kawano, T.
Hale, G. D.
Pigni, M. T.
Herman, M.
Oblozinsky, P.
Williams, M. L.
Dunn, M. E.
Arbanas, G.
Wiarda, D.
McKnight, R. D.
McKamy, J. N.
Felty, J. R.
TI Low-fidelity Covariance Project
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB The Low-Fidelity Covariance Project has developed a complete set of covariance data estimates for all ENDF/B-VII.0 isotopes. Covariance data are provided for elastic scattering, inelastic scattering, (n,2n) reactions, radiative capture and fission (cross section and nubar) over the energy range front 10(-5) eV to 20 MeV. Various approximations were utilized depending on the mass of the target, the neutron energy, range, and the neutron reaction. The resulting covariance data are not art official part of ENDF/B-VII: but are available for testing in nuclear applications.
C1 [Little, R. C.; Kawano, T.; Hale, G. D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Pigni, M. T.; Herman, M.; Oblozinsky, P.] Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
[Williams, M. L.; Dunn, M. E.; Arbanas, G.; Wiarda, D.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[McKnight, R. D.] Argonne Natl Lab, Argonne, IL 60439 USA.
[McKamy, J. N.; Felty, J. R.] US DOE, Washington, DC 20585 USA.
RP Little, RC (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM rcl@lanl.gov
NR 18
TC 30
Z9 30
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 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2828
EP 2833
DI 10.1016/j.nds.2008.11.018
PG 6
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400019
ER
PT J
AU Carlson, AD
Badikov, SA
Chen, ZP
Gai, E
Hale, GM
Hambsch, FJ
Hoffman, HM
Kawano, T
Larson, NM
Oli, SY
Pronyaev, VG
Smith, DL
Tagesen, S
Vonach, H
AF Carlson, A. D.
Badikov, S. A.
Chen Zhenpeng
Gai, E.
Hale, G. M.
Hambsch, F. -J.
Hoffman, H. M.
Kawano, T.
Larson, N. M.
Oli, S. Y.
Pronyaev, V. G.
Smith, D. L.
Tagesen, S.
Vonach, H.
TI Covariances Obtained from an Evaluation of the Neutron Cross Section
Standards
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB New measurements and all improved evaluation process were used to obtain a new evaluation of the neutron Cross section standards. Efforts were made to include as much information as possible on the components of the data uncertainties that were then used to obtain the covariance matrices for the experimental data. Evaluations were produced from this process for the (6)Li(n,t), (10)B(n,alpha), (10)B(n,alpha(1)gamma), (197)Au(n,gamma), (235)U (n, f), and (238)U(n,f) standard cross sections as well as the non-standard (6)Li(n,n), (10)B(n,n), (238)U(n,gamma) and (239)U(n,f) cross sections. There is a general increase in the cross sections for most of the new evaluations, by as much as about 5%, compared with the ENDF/B-VI results. Covariance data were obtained for the (6)Li(n,t), (6)Li(n,n), (10)B(n,alpha), (10)B(n,alpha(1)gamma), (10)B(n,n), (197)Au(n,gamma), (235)U(n,f), (238)U(n,f), (238)U(n,gamma) and (239)Pu(n,f) reactions. Also an independent R-Matrix evaluation was produced for the H(n,n) standard cross-section, however, covariance data axe riot available for this reaction. The evaluations were used in the new ENDF/B-VII library.
C1 [Carlson, A. D.] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
[Badikov, S. A.] Cent Res Inst Management Econ & Informat, Moscow, Russia.
[Chen Zhenpeng] Tsinghua Univ, Beijing 100084, Peoples R China.
[Gai, E.; Pronyaev, V. G.] Inst Phys & Power Engn, Obninsk, Kaluga Region, Russia.
[Hale, G. M.; Kawano, T.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Hambsch, F. -J.] Inst Reference Mat & Measurements, Geel, Belgium.
[Hoffman, H. M.] Univ Erlangen Nurnberg, Erlangen, Germany.
[Larson, N. M.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Oli, S. Y.] Korea Atom Energy Res Inst, Taejon, South Korea.
[Smith, D. L.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Tagesen, S.; Vonach, H.] Univ Vienna, Vienna, Austria.
RP Carlson, AD (reprint author), Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
EM carlson@nist.gov
NR 15
TC 4
Z9 4
U1 2
U2 6
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2834
EP 2839
DI 10.1016/j.nds.2008.11.019
PG 6
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400020
ER
PT J
AU Yang, WS
Aliberti, G
McKnight, RD
Kodeli, I
AF Yang, W. S.
Aliberti, G.
McKnight, R. D.
Kodeli, I.
TI Fission Spectrum Covariance Matrix and Sensitivity Coefficients for
Response Parameter Uncertainty Estimation
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB This paper discusses the consistent usage of fission spectrum covariance matrices and sensitivity coefficients for response parameter uncertainty estimation. The effects of covariance matrix normalization on response parameter uncertainties are described from a mathematical point of view, along with their inter-relation with the constrained sensitivity coefficients. The numerical precision for practical renormalization of covariance matt-ices and the impact of the constrained sensitivity coefficients are also discussed by estimating the multiplication factor uncertainties due to fission spectrum uncertainties for a sodium-cooled fast burner core concept.
C1 [Yang, W. S.; Aliberti, G.; McKnight, R. D.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Kodeli, I.] OECD NEA Data Bank, IAEA Representat, F-92130 Issy Les Moulineaux, France.
RP Yang, WS (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM wyang@anl.gov
OI Yang, Won Sik/0000-0003-0734-6023
NR 7
TC 5
Z9 5
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 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2852
EP 2857
DI 10.1016/j.nds.2008.11.022
PG 6
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400023
ER
PT J
AU Talou, P
Madland, DC
Kawano, T
AF Talou, P.
Madland, D. C.
Kawano, T.
TI Uncertainty Quantification on Prompt Fission Neutrons Spectra
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB Uncertainties in the evaluated prompt fission neutrons spectra present in ENDF/B-VII.0 are assessed in the framework of the Los Alamos model. The methodology used to quantify the uncertainties on an evaluated spectrum is introduced. We also briefly review the Los Alamos model and single out the parameters that have the largest influence on the calculated results. Using a Kalman filter, experimental data and uncertainties are introduced to constrain model parameters, and construct an evaluated covariance matrix for the prompt neutrons spectrum. Preliminary results are shown in the case of neutron-induced fission of (235)U from thermal tip to 15 MeV incident energies.
C1 [Talou, P.; Madland, D. C.; Kawano, T.] Los Alamos Natl Lab, Nucl Phys Grp, Los Alamos, NM 87545 USA.
RP Talou, P (reprint author), Los Alamos Natl Lab, Nucl Phys Grp, T-16, Los Alamos, NM 87545 USA.
EM talou@lanl.gov
NR 9
TC 4
Z9 4
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 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2858
EP 2862
DI 10.1016/j.nds.2008.11.023
PG 5
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400024
ER
PT J
AU Mughabghab, SF
Oblozinsky, P
AF Mughabghab, S. F.
Oblozinsky, P.
TI Neutron Cross Section Uncertainties in the Thermal and Resonance Regions
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
ID CAPTURE
AB In the Atlas of Neutron Resonances, special care was expended to ensure that the resonance parameter information reproduces the various measured thermal cross sections, as well as the infinite dilute resonance integrals for Z = 1-100. In contrast, the uncertainties of the recommended quantities do not match those generated from the uncertainties of the resonance parameters. To address this problem, the present study was initiated to achieve consistency for 15 actinides and 21 structural and coolant moderator materials. This is realized by assigning uncertainties to the parameters of the negative-energy resonances and changing, if necessary, significantly the uncertainties of the low-lying positive-energy resonances. The influence of correlations between parameters on the derived uncertainties is examined and discussed.
C1 [Mughabghab, S. F.; Oblozinsky, P.] Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
RP Mughabghab, SF (reprint author), Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
EM mugabgab@bnl.gov
NR 14
TC 3
Z9 3
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 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2863
EP 2867
DI 10.1016/j.nds.2008.11.024
PG 5
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400025
ER
PT J
AU Leal, LC
Arbanas, G
Wiarda, D
Derrien, H
AF Leal, L. C.
Arbanas, G.
Wiarda, D.
Derrien, H.
TI Resonance Region Covariance Analysis Method and New Covariance Data for
Th-232, U-233, U-235, U-238, and Pu-239
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB Resonance-parameter covariance matrix (RPCM) evaluations in the resolved resonance region were done for Th-232, U-233, U-235, U-238, and Pu-239 using the computer code SAMMY. The retroactive approach of the code SAMMY was used to generate the RPCMs for U-233 and U-235. RPCMS for Th-232, U-238 and Pu-239 were generated together with the resonance parameter evaluations. The RPCMs were then converted in the ENDF format using the File32 representation. Alternatively, for computer storage reasons, the File32 was converted in the File33 cross section covariance matrix (CSCM). Both representations were processed using the computer code PUFF-IV. This paper describes the procedures used to generate the RPCM with SAMMY.
C1 [Leal, L. C.; Arbanas, G.; Wiarda, D.; Derrien, H.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Leal, LC (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA.
EM leallc@ornl.gov
NR 16
TC 7
Z9 7
U1 1
U2 1
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
SI SI
BP 2868
EP 2873
DI 10.1016/j.nds.2008.11.025
PG 6
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400026
ER
PT J
AU Pigni, MT
Herman, M
Oblozinsky, P
AF Pigni, M. T.
Herman, M.
Oblozinsky, P.
TI Estimated Mn-55 and Zr-90 Cross Section Covariances in the Fast Neutron
Energy Region
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
ID THRESHOLD; LIBRARY; FUSION
AB We completed estimates of neutron cross section covariances for Mn-55 and Zr-90, from the keV energy range to 25 MeV, considering the most important reaction channels, total, elastic, inelastic, capture, and (n,2n). The nuclear reaction model code EMPIRE was used to calculate sensitivity to model parameters by a perturbation of parameters that define the optical model potential, nuclear level densities and strength of the pre-equilibrium emission. The sensitivity analysis was performed with the set of parameters which reproduces the ENDF/B-VII.0 cross sections. The experimental data were analyzed and both statistical and systematic uncertainties were extracted from almost 30 selected experiments. Then, the Bayesian code KALMAN was used to combine the sensitivity analysis and the experiments to obtain the evaluated covariance matrices.
C1 [Pigni, M. T.; Herman, M.; Oblozinsky, P.] Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
RP Pigni, MT (reprint author), Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
EM pigni@bnl.gov
NR 34
TC 2
Z9 2
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 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
SI SI
BP 2900
EP 2904
DI 10.1016/j.nds.2008.11.031
PG 5
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400032
ER
PT J
AU Trkov, A
Capote, R
Kodeli, I
Leal, L
AF Trkov, A.
Capote, R.
Kodeli, I.
Leal, L.
TI Evaluation of Tungsten Nuclear Reaction Data with Covariances
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB As a follow-tip of the work presented at the ND-2007 conference in Nice, additional fast reactor benchmarks were analyzed. Adjustment to the, cross sections in the keV region was necessary. Evaluated neutron cross section data files for (180,182,183,184,186)W isotopes were produced. Covariances were generated for all isotopes except (180)W. In the resonance range the retro-active method was used. Above the resolved resonance range the covariance prior was generated by the Monte Carlo technique from nuclear model calculations with the Empire-II code. Experimental data were taken into account through the GANDR. System using the generalized least-squares technique. Introducing experimental data results in relatively small changes in the cross sections, but greatly constrains the uncertainties. The covariance files are currently undergoing testing.
C1 [Trkov, A.] Jozef Stefan Inst, Ljubljana, Slovenia.
[Capote, R.] IAEA, Nucl Data Sect, A-1400 Vienna, Austria.
[Kodeli, I.] NEA Data Bank, IAEA, Paris, France.
[Leal, L.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
RP Trkov, A (reprint author), Jozef Stefan Inst, Ljubljana, Slovenia.
EM Andrej.Trkov@ijs.si
RI Capote Noy, Roberto/M-1245-2014
OI Capote Noy, Roberto/0000-0002-1799-3438
NR 8
TC 10
Z9 10
U1 0
U2 1
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2905
EP 2909
DI 10.1016/j.nds.2008.11.032
PG 5
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400033
ER
PT J
AU Arcilla, R
Kahler, AC
Oblozinsky, P
Herman, M
AF Arcilla, R.
Kahler, A. C.
Oblozinsky, P.
Herman, M.
TI Processing Neutron Cross Section Covariances using NJOY-99 and PUFF-IV
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB With the growing demand for multigroup covariances, the National Nuclear Data Center (NNDC) has been experiencing air upsurge in its covariance data processing activities using the two US codes NJOY-99 (LANL) and PUFF-IV (ORNL). The code NJOY-99 was upgraded by incorporating the new module ERRORJ-2.3, while the NNDC served as the active user and provided feedback. The NNDC has been primarily processing neutron cross section covariances on its 64-bit Linux cluster in support of two DOE programs, the Global Nuclear Energy Partnership (GNEP) and the Nuclear Criticality Safety Program (NCSP). For GNEP, the NNDC used NJOY-99.259 to generate multigroup covariance matrices of (56)Fe (23)Na, (239)Pu, (235)U and (238)U from the JENDL-3.3 library using the 15-, 33-, and 230-energy group structures. These covariance matrices will be used to test a new collapsing algorithm which will subsequently be employed to calculate uncertainties on integral parameters in different fast neutron-based systems. For NCSP, we used PUFF-IV 1.0.4 to verify the processability of new evaluated covariance data of (55)Mn, (239)Pu, (233)U, (235)U and (238)U generated by a collaboration of ORNL and LANL. For the data end-users at large, the NNDC has made available a Web site which provides a static visualization interface for all materials with covariance data in the four major data libraries: ENDF/B-VI.8 (47 materials), ENDF/B-VII.0 (26 materials), JEFF-3.1 (37 materials) and JENDL-3.3 (20 materials).
C1 [Arcilla, R.; Oblozinsky, P.; Herman, M.] Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
[Kahler, A. C.] Los Alamos Natl Lab, Div Theoret, Nucl Phys Grp T 16, Los Alamos, NM 87545 USA.
RP Arcilla, R (reprint author), Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
EM arcilla@bnl.gov
NR 9
TC 1
Z9 1
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 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2910
EP 2914
DI 10.1016/j.nds.2008.11.033
PG 5
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400034
ER
PT J
AU Smith, DL
AF Smith, Donald L.
TI Summary of the Workshop on Neutron Cross Section Covariances
SO NUCLEAR DATA SHEETS
LA English
DT Article; Proceedings Paper
CT Workshop on Neutron Cross Section Convariances
CY JUN 24-28, 2008
CL Long Isl, NY
AB A Workshop on Neutron Cross Section Covariances was held from June 24 - 27; 2008, in Port Jefferson, New York. This Workshop was organized by the National Nuclear Data Center, Brookhaven National Laboratory, to provide a forum for reporting on the status of the growing field of neutron cross section covariances for applications and for discussing future directions of the work in this field. The Workshop focused on the following four major topical areas: covariance methodology, recent covariance evaluations, covariance applications, and user perspectives. Attention was given to the entire spectrum of neutron cross section covariance concerns ranging from light nuclei to the actinides, and from the thermal energy region to 20 MeV. The papers presented at this conference explored topics ranging from fundamental nuclear physics concerns to very specific applications in advanced reactor design and nuclear criticality safety. This paper provides a summary of this workshop. Brief comments on the highlights of each Workshop contribution are provided. In addition, a perspective on the achievements and shortcomings of the Workshop as well as on the future direction of research in this field is offered.
C1 Argonne Natl Lab, Coronado, CA 92118 USA.
RP Smith, DL (reprint author), Argonne Natl Lab, 1710 Ave Mundo, Coronado, CA 92118 USA.
EM Donald.L.Smith@anl.gov
NR 5
TC 5
Z9 5
U1 0
U2 1
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD DEC
PY 2008
VL 109
IS 12
BP 2915
EP 2922
DI 10.1016/j.nds.2008.11.034
PG 8
WC Physics, Nuclear
SC Physics
GA 386YL
UT WOS:000261918400035
ER
PT J
AU Hakobyan, A
Aldemir, T
Denning, R
Dunagan, S
Kunsman, D
Rutt, B
Catalyurek, U
AF Hakobyan, Aram
Aldemir, Tunc
Denning, Richard
Dunagan, Sean
Kunsman, David
Rutt, Benjamin
Catalyurek, Umit
TI Dynamic generation of accident progression event trees
SO NUCLEAR ENGINEERING AND DESIGN
LA English
DT Article
AB Currently, the development and analysis of accident progression event trees (APETs) are performed in a manner that is computationally time consuming, difficult to reproduce and also can be phenomenologically inconsistent. A software tool is presented for automated APET generation using the concept of dynamic event trees. The tool determines the branching times from a severe accident analysis code based on user specified criteria for branching. It assigns user specified probabilities to every branch, tracks the total branch probability, and truncates branches based on the given pruning/truncation rules to avoid an unmanageable number of scenarios. While the software tool could be applied to any systems analysis code, the MELCOR code is used for this illustration. A case study is presented involving station blackout with the loss of auxiliary feedwater system for a pressurized water reactor. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Hakobyan, Aram; Aldemir, Tunc; Denning, Richard] Ohio State Univ, Nucl Engn Program, Columbus, OH 43210 USA.
[Dunagan, Sean; Kunsman, David] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Rutt, Benjamin; Catalyurek, Umit] Ohio State Univ, Dept Biomed Informat, Columbus, OH 43210 USA.
RP Hakobyan, A (reprint author), Ohio State Univ, Nucl Engn Program, 201 W 19th Ave, Columbus, OH 43210 USA.
EM hakobyan.1@osu.edu
RI Catalyurek, Umit/A-2454-2008
OI Catalyurek, Umit/0000-0002-5625-3758
FU Sandia National Laboratories (SNL)
FX The research presented in this paper was partially supported by a
contract from the Sandia National Laboratories (SNL). The information
and conclusions presented here in are those of the authors and do not
necessary represent the views or positions of the SNL. Neither the U.S.
Government nor any agency there of, nor any employee, makes any
warranty, expressed or implied, or assume any legal liability or
responsibility for any third party's use of this information.
NR 28
TC 29
Z9 31
U1 1
U2 11
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 DEC
PY 2008
VL 238
IS 12
BP 3457
EP 3467
DI 10.1016/j.nucengdes.2008.08.005
PG 11
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 377ZX
UT WOS:000261292000029
ER
PT J
AU Fenstermacher, ME
Evans, TE
Osborne, TH
Schaffer, MJ
Degrassie, JS
Gohil, P
Moyer, RA
AF Fenstermacher, M. E.
Evans, T. E.
Osborne, T. H.
Schaffer, M. J.
deGrassie, J. S.
Gohil, P.
Moyer, R. A.
CA DIII-D Team
TI Suppression of type-I ELMs using a single toroidal row of magnetic field
perturbation coils in DIII-D
SO NUCLEAR FUSION
LA English
DT Article
ID EDGE LOCALIZED MODES; CHAPTER 1
AB In recent DIII-D (J.L. Luxon et al 2003 Nucl. Fusion 43 1813) experiments, suppression of type-I edge localized modes (ELMs) was obtained by applying n = 3 resonant magnetic perturbations using a single toroidal row of internal, small aperture coils located either above or below the equatorial plane in plasmas with ITER-like electron pedestal collisionality nu(e)* similar to 0.1, flux surface shape and low edge safety factor (q(95) approximate to 3.6). ELM suppression with a single row of coils was achieved at approximately the same q(95) surface-averaged perturbation field as with two rows of coils, but required higher current per coil. Suppression of type-I ELMs was not obtained with similar n = 3 perturbation strength at the q(95) surface from a single-row of external, large aperture coils on the outer equatorial midplane.
C1 [Fenstermacher, M. E.] Lawrence Livermore Natl Lab, Livermore, CA USA.
[Evans, T. E.; Osborne, T. H.; Schaffer, M. J.; deGrassie, J. S.; Gohil, P.] Gen Atom Co, San Diego, CA USA.
[Moyer, R. A.] Univ Calif San Diego, La Jolla, CA 92093 USA.
RP Fenstermacher, ME (reprint author), Lawrence Livermore Natl Lab, Livermore, CA USA.
FU US Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344, DE-FC02-04ER54698, DE-FG02-07ER54917]
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 DE-FC02-04ER54698 and DE-FG02-07ER54917.
NR 15
TC 23
Z9 23
U1 3
U2 7
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 DEC
PY 2008
VL 48
IS 12
AR 122001
DI 10.1088/0029-5515/48/12/122001
PG 4
WC Physics, Fluids & Plasmas
SC Physics
GA 383TN
UT WOS:000261696500001
ER
PT J
AU Jackson, GL
Casper, TA
Luce, TC
Humphreys, DA
Ferron, JR
Hyatt, AW
Lazarus, EA
Moyer, RA
Petrie, TW
Rudakov, DL
West, WP
AF Jackson, G. L.
Casper, T. A.
Luce, T. C.
Humphreys, D. A.
Ferron, J. R.
Hyatt, A. W.
Lazarus, E. A.
Moyer, R. A.
Petrie, T. W.
Rudakov, D. L.
West, W. P.
TI ITER startup studies in the DIII-D tokamak
SO NUCLEAR FUSION
LA English
DT Article
ID HEATING ASSISTED STARTUP; PLASMA OPERATION; CHAPTER 8; CYCLOTRON;
SIMULATIONS; DESIGN
AB A plasma initiation and current ramp up scenario envisioned for ITER has been simulated in DIII-D experiments. These discharges were limited on the low field side (LFS) during the initial current ramp up, as specified for the ITER baseline startup scenario. Initial experiments produced internal inductance (l(i)),higher than the design value for the ITER shaping coils, often leading to vertical instabilities. A modified startup with larger volume was developed to reduce l(i) in the current ramp up. This large-bore scenario, also limiting on the LFS, produced a lower l(i) and avoided the vertical instabilities. Feedback control of l(i), using the ohmic field coil power supply as the actuator, was successfully demonstrated. Such control may be useful in avoiding vertical instabilities and in providing access to sawtooth-free steady state and hybrid scenarios in ITER. Experiments at reduced inductive voltage and with electron cyclotron assist for breakdown and burnthrough have also been carried out. The Corsica equilibrium and transport code has modelled these data to provide validation of transport models used to simulate this phase of ITER discharges in order to yield more accurate extrapolation to ITER scenarios.
C1 [Jackson, G. L.; Luce, T. C.; Humphreys, D. A.; Ferron, J. R.; Hyatt, A. W.; Petrie, T. W.; West, W. P.] Gen Atom Co, San Diego, CA 92186 USA.
[Casper, T. A.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Lazarus, E. A.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Moyer, R. A.; Rudakov, D. L.] Univ Calif San Diego, La Jolla, CA 92093 USA.
RP Jackson, GL (reprint author), Gen Atom Co, POB 85608, San Diego, CA 92186 USA.
FU US Department of Energy [DE-FC02-04ER54698, W-7405-ENG-48,
DE-AC05-00OR22725, DE-FG02-04ER54758]
FX This work supported by the US Department of Energy under
DE-FC02-04ER54698, W-7405-ENG-48, DE-AC0500OR22725 and
DE-FG02-04ER54758.
NR 19
TC 26
Z9 27
U1 0
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 DEC
PY 2008
VL 48
IS 12
AR 125002
DI 10.1088/0029-5515/48/12/125002
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 383TN
UT WOS:000261696500004
ER
PT J
AU Roach, CM
Walters, M
Budny, RV
Imbeaux, F
Fredian, TW
Greenwald, M
Stillerman, JA
Alexander, DA
Carlsson, J
Cary, JR
Ryter, F
Stober, J
Gohil, P
Greenfield, C
Murakami, M
Bracco, G
Esposito, B
Romanelli, M
Parail, V
Stubberfield, P
Voitsekhovitch, I
Brickley, C
Field, AR
Sakamoto, Y
Fujita, T
Fukuda, T
Hayashi, N
Hogeweij, GMD
Chudnovskiy, A
Kinerva, NA
Kessel, CE
Aniel, T
Hoang, GT
Ongena, J
Doyle, EJ
Houlberg, WA
Polevoi, AR
AF Roach, C. M.
Walters, M.
Budny, R. V.
Imbeaux, F.
Fredian, T. W.
Greenwald, M.
Stillerman, J. A.
Alexander, D. A.
Carlsson, J.
Cary, J. R.
Ryter, F.
Stober, J.
Gohil, P.
Greenfield, C.
Murakami, M.
Bracco, G.
Esposito, B.
Romanelli, M.
Parail, V.
Stubberfield, P.
Voitsekhovitch, I.
Brickley, C.
Field, A. R.
Sakamoto, Y.
Fujita, T.
Fukuda, T.
Hayashi, N.
Hogeweij, G. M. D.
Chudnovskiy, A.
Kinerva, N. A.
Kessel, C. E.
Aniel, T.
Hoang, G. T.
Ongena, J.
Doyle, E. J.
Houlberg, W. A.
Polevoi, A. R.
CA ITPA Confinement Database
Modelling Topical Grp
ITPA Transport Phys Topical Grp
TI The 2008 Public Release of the International Multi-tokamak Confinement
Profile Database
SO NUCLEAR FUSION
LA English
DT Review
ID DIII-D TOKAMAK; ELMY H-MODE; HIGH-PERFORMANCE DISCHARGES; AMPERE
SPHERICAL TOKAMAK; ELECTRON HEAT-TRANSPORT; RADIATIVE IMPROVED MODE;
CYCLOTRON CURRENT DRIVE; STEADY-STATE OPERATION; NEUTRAL BEAM INJECTION;
DOUBLE-BARRIER REGIME
AB This paper documents the public release PR08 of the International Tokamak Physics Activity (ITPA) profile database, which should be of particular interest to the magnetic confinement fusion community. Data from a wide variety of interesting discharges from many of the world's leading tokamak experiments are now made available in PR08, which also includes predictive simulations of an initial set of operating scenarios for ITER. In this paper we describe the discharges that have been included and the tools that are available to the reader who is interested in accessing and working with the data. Most discharge descriptions refer to more detailed previous publications. In addition, we review physics analyses that have already made use of the profile database discharges. Public access to PR08 data is unconditional, but this paper should be cited by any publication that makes use of PR08 data.
C1 [Roach, C. M.; Walters, M.; Romanelli, M.; Parail, V.; Stubberfield, P.; Voitsekhovitch, I.; Brickley, C.; Field, A. R.] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.
[Budny, R. V.; Kessel, C. E.] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Fredian, T. W.; Greenwald, M.; Stillerman, J. A.] MIT, Cambridge, MA 02139 USA.
[Alexander, D. A.; Carlsson, J.; Cary, J. R.] Tech X Corp, Boulder, CO USA.
[Ryter, F.; Stober, J.] Max Planck Inst Plasma Phys, Euratom Assoc Garching, Rostock, Germany.
[Gohil, P.; Greenfield, C.] Gen Atom Co, San Diego, CA USA.
[Murakami, M.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Bracco, G.; Esposito, B.] CRE Frascati, Assoc Euratom ENEA Fus, Rome, Italy.
[Sakamoto, Y.; Fujita, T.; Hayashi, N.] Japan Atom Energy Agcy, Ibaraki, Japan.
[Fukuda, T.] Osaka Univ, Grad Sch Engn, Osaka 5670047, Japan.
[Chudnovskiy, A.; Kinerva, N. A.] Russian Res Ctr, Kurchatov Inst, Moscow, Russia.
[Ongena, J.] Assoc Euratom Belgian State, Ecole Royale Mil, Koninglijke Mil Sch, Brussels, Belgium.
[Doyle, E. J.] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90024 USA.
[Doyle, E. J.] Univ Calif Los Angeles, PSTI, Los Angeles, CA 90024 USA.
[Houlberg, W. A.; Polevoi, A. R.] ITER Org, F-13108 St Paul Les Durance, France.
RP Roach, CM (reprint author), UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.
RI Roach, Colin/C-4839-2011; ANIEL, Thierry/G-8734-2011; Imbeaux,
Frederic/A-7614-2013;
OI ANIEL, Thierry/0000-0002-2598-9551; Carlsson, Johan/0000-0003-4614-8150;
Greenwald, Martin/0000-0002-4438-729X
NR 174
TC 24
Z9 24
U1 2
U2 18
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 DEC
PY 2008
VL 48
IS 12
AR 125001
DI 10.1088/0029-5515/48/12/125001
PG 19
WC Physics, Fluids & Plasmas
SC Physics
GA 383TN
UT WOS:000261696500003
ER
PT J
AU Jeon, DO
AF Jeon, Dong-o
TI Measurement of beam loading at the SNS superconducting linac for a beam
with beta < 1
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE Beam loading; Superconducting; Shunt impedance
AB When a beam passes through superconducting cavities, it excites beam induced fields in the cavities. A systematic study is performed to study the beam loading effects with beta < 1 beam on the beta = 0.81 superconducting cavities of the Spallation Neutron Source (SNS) linac. The analysis indicates that the shunt impedance equation is still valid even for a beam with beta well below 1. It is also shown that the induced field level is consistent with the estimation and its effect on the beam dynamics is consistent with the model. (C) 2008 Elsevier B.V. All rights reserved.
C1 Oak Ridge Natl Lab, Accelerator Phys Grp, SNS Project, Oak Ridge, TN 37831 USA.
RP Jeon, DO (reprint author), Oak Ridge Natl Lab, Accelerator Phys Grp, SNS Project, Oak Ridge, TN 37831 USA.
EM jeond@ornl.gov
RI Jeon, Dong-O/S-2137-2016
OI Jeon, Dong-O/0000-0001-6482-5878
FU UT-Battelle, LLC [DE-AC05-00OR22725]
FX SNS is managed by UT-Battelle, LLC. under contract DE-AC05-00OR22725 for
the U.S.A Department of Energy.
NR 8
TC 1
Z9 1
U1 0
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 DEC 1
PY 2008
VL 597
IS 2-3
BP 132
EP 135
DI 10.1016/j.nima.2008.08.145
PG 4
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 388AA
UT WOS:000261991500003
ER
PT J
AU Aharrouche, M
Colas, J
Di Ciaccio, L
El Kacimi, M
Gaumer, O
Gouanere, M
Goujdami, D
Lafaye, R
Laplace, S
Perrodo, P
Prieur, D
Przysiezniak, H
Sauvage, G
Tarrade, F
Wingerter-Seez, I
Zitoun, R
Lanni, F
Ma, H
Rajagopalan, S
Rescia, S
Takai, H
Belymam, A
Benchekroun, D
Hakimi, M
Hoummada, A
Stroynowski, R
Zarzhitsky, P
Ye, J
Aleksa, M
Hansen, JB
Carli, T
Fassnacht, P
Gianotti, F
Hervas, L
Lampl, W
Unal, G
Collot, J
Hostachy, JY
Ledroit-Guillon, F
Martin, P
Malek, F
Viret, S
Ban, J
Leltchouk, M
Parsons, JA
Sippach, W
Banfi, D
Carminati, L
Cavalli, D
Costa, G
Delmastro, M
Fanti, M
Mandelli, L
Mazzanti, M
Tartarelli, GF
Bourdarios, C
Fayard, L
Fournier, D
Graziani, G
Iconomidou-Fayard, L
Kado, M
Lelas, D
Plamondon, M
Poggioli, L
Puzo, P
Rousseau, D
Sacco, R
Serin, L
Simion, S
Zerwas, D
Camard, A
Lacour, D
Laforge, B
Nikolic-Audit, I
Schwemling, P
Cleland, W
Ghazlane, H
El Moursli, RC
Fakhr-Eddine, AI
Boonekamp, M
Kerschen, N
Mansoulie, B
Meyer, JP
Schwindling, J
Lund-Jensen, B
AF Aharrouche, M.
Colas, J.
Di Ciaccio, L.
El Kacimi, M.
Gaumer, O.
Gouanere, M.
Goujdami, D.
Lafaye, R.
Laplace, S.
Perrodo, P.
Prieur, D.
Przysiezniak, H.
Sauvage, G.
Tarrade, F.
Wingerter-Seez, I.
Zitoun, R.
Lanni, F.
Ma, H.
Rajagopalan, S.
Rescia, S.
Takai, H.
Belymam, A.
Benchekroun, D.
Hakimi, M.
Hoummada, A.
Stroynowski, R.
Zarzhitsky, P.
Ye, J.
Aleksa, M.
Hansen, J. Beck
Carli, T.
Fassnacht, P.
Gianotti, F.
Hervas, L.
Lampl, W.
Unal, G.
Collot, J.
Hostachy, J. Y.
Ledroit-Guillon, F.
Martin, P.
Malek, F.
Viret, S.
Ban, J.
Leltchouk, M.
Parsons, J. A.
Sippach, W.
Banfi, D.
Carminati, L.
Cavalli, D.
Costa, G.
Delmastro, M.
Fanti, M.
Mandelli, L.
Mazzanti, M.
Tartarelli, G. F.
Bourdarios, C.
Fayard, L.
Fournier, D.
Graziani, G.
Iconomidou-Fayard, L.
Kado, M.
Lelas, D.
Plamondon, M.
Poggioli, L.
Puzo, P.
Rousseau, D.
Sacco, R.
Serin, L.
Simion, S.
Zerwas, D.
Camard, A.
Lacour, D.
Laforge, B.
Nikolic-Audit, I.
Schwemling, Ph.
Cleland, W.
Ghazlane, H.
Cherkaoui El Moursli, R.
Idrissi Fakhr-Eddine, A.
Boonekamp, M.
Kerschen, N.
Mansoulie, B.
Meyer, J. P.
Schwindling, J.
Lund-Jensen, B.
TI Time resolution of the ATLAS barrel liquid argon electromagnetic
calorimeter
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE LHC; Calorimetry particle physics; Electromagnetic; Timing
AB The time reconstruction performance of the ATLAS electromagnetic calorimeter readout is studied. The contribution of the electronics to the time resolution is estimated to be about 20 ps, thus demonstrating the possibility of achieving a small constant term in the time resolution for particles. The resolution to electromagnetic showers produced by an electron beam is also measured. After correction for the effects due to the calorimeter geometry, a 100 ps constant term is found for a typical cell. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Bourdarios, C.; Fayard, L.; Fournier, D.; Graziani, G.; Iconomidou-Fayard, L.; Kado, M.; Lelas, D.; Plamondon, M.; Poggioli, L.; Puzo, P.; Rousseau, D.; Sacco, R.; Serin, L.; Simion, S.; Zerwas, D.] Univ Paris 11, Lab Accelerateur Lineaire, CNRS, IN2P3, F-91898 Orsay, France.
[Aharrouche, M.; Colas, J.; Di Ciaccio, L.; El Kacimi, M.; Gaumer, O.; Gouanere, M.; Goujdami, D.; Lafaye, R.; Laplace, S.; Perrodo, P.; Prieur, D.; Przysiezniak, H.; Sauvage, G.; Tarrade, F.; Wingerter-Seez, I.; Zitoun, R.] CNRS, IN2P3, LAPP, F-74941 Annecy Le Vieux, France.
[Lanni, F.; Ma, H.; Rajagopalan, S.; Rescia, S.; Takai, H.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Belymam, A.; Benchekroun, D.; Hakimi, M.; Hoummada, A.] Fac Sci Ain Chock, Casablanca, Morocco.
[Stroynowski, R.; Zarzhitsky, P.; Ye, J.] So Methodist Univ, Dallas, TX 75275 USA.
[Aleksa, M.; Hansen, J. Beck; Carli, T.; Fassnacht, P.; Gianotti, F.; Hervas, L.; Lampl, W.; Unal, G.] CERN, European Lab Particle Phys, CH-1211 Geneva 23, Switzerland.
[Collot, J.; Hostachy, J. Y.; Ledroit-Guillon, F.; Martin, P.; Malek, F.; Viret, S.] Univ Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, F-38026 Grenoble, France.
[Ban, J.; Leltchouk, M.; Parsons, J. A.; Sippach, W.] Columbia Univ, Nevis Labs, Irvington, NY 10533 USA.
[Banfi, D.; Carminati, L.; Cavalli, D.; Costa, G.; Delmastro, M.; Fanti, M.; Mandelli, L.; Mazzanti, M.; Tartarelli, G. F.] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
[Banfi, D.; Carminati, L.; Cavalli, D.; Costa, G.; Delmastro, M.; Fanti, M.; Mandelli, L.; Mazzanti, M.; Tartarelli, G. F.] Ist Nazl Fis Nucl, I-20133 Milan, Italy.
[Camard, A.; Lacour, D.; Laforge, B.; Nikolic-Audit, I.; Schwemling, Ph.] Univ Paris 06, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France.
[Camard, A.; Lacour, D.; Laforge, B.; Nikolic-Audit, I.; Schwemling, Ph.] Univ Paris 07, F-75252 Paris, France.
[Cleland, W.] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA.
[Ghazlane, H.] Fac Sci Rabat, Rabat, Morocco.
[Ghazlane, H.] Ctr Natl Energie Sci & Tech Nucl, Rabat, Morocco.
[Cherkaoui El Moursli, R.; Idrissi Fakhr-Eddine, A.] Univ Mohammed 5, Fac Sci, Rabat, Morocco.
[Boonekamp, M.; Kerschen, N.; Mansoulie, B.; Meyer, J. P.; Schwindling, J.] CE Saclay, CEA, DAPNIA, Serv Phys Particules, F-91191 Gif Sur Yvette, France.
[Lund-Jensen, B.] Royal Inst Technol, Stockholm, Sweden.
RP Serin, L (reprint author), Univ Paris 11, Lab Accelerateur Lineaire, CNRS, IN2P3, F-91898 Orsay, France.
EM serin@lal.in2p3.fr; nikolic@lpnhe.in2p3.fr
RI Rescia, Sergio/D-8604-2011; Takai, Helio/C-3301-2012; Delmastro,
Marco/I-5599-2012; Tartarelli, Giuseppe Francesco/A-5629-2016
OI Rescia, Sergio/0000-0003-2411-8903; Takai, Helio/0000-0001-9253-8307;
Delmastro, Marco/0000-0003-2992-3805; Tartarelli, Giuseppe
Francesco/0000-0002-4244-502X
NR 16
TC 10
Z9 10
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 DEC 1
PY 2008
VL 597
IS 2-3
BP 178
EP 188
DI 10.1016/j.nima.2008.08.142
PG 11
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 388AA
UT WOS:000261991500011
ER
PT J
AU Cromaz, M
Riot, VJ
Fallon, P
Gros, S
Holmes, B
Lee, IY
Macchiavelli, AO
Vu, C
Yaver, H
Zimmermann, S
AF Cromaz, M.
Riot, V. J.
Fallon, P.
Gros, S.
Holmes, B.
Lee, I. Y.
Macchiavelli, A. O.
Vu, C.
Yaver, H.
Zimmermann, S.
TI A digital signal processing module for gamma-ray tracking detectors
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE Digital signal processing; Gamma-ray spectrometer; Digitizer; HPGe
detector
AB We have designed and constructed an 8-channel digital signal processing board for the GRETINA spectrometer. The digitizer samples each of 8 inputs at 100 MHz with 12-bit resolution. Employing a large on-board FPGA, the board derives an energy, leading-edge time, and constant-fraction time from the input signal providing the functionality of a conventional analog electronics system. Readout and control of the digitizer is done over a VME bus. The digitizer's performance met all requirements for processing signals from the GRETINA spectrometer. Published by Elsevier B.V.
C1 [Cromaz, M.; Riot, V. J.; Fallon, P.; Gros, S.; Holmes, B.; Lee, I. Y.; Macchiavelli, A. O.; Vu, C.; Yaver, H.; Zimmermann, S.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Cromaz, M (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM mcromaz@lbl.gov
FU US Department of Energy [DE-AC02-65-CH11231]
FX This work has been supported by the Director, Office of Science of the
US Department of Energy under Contract no. DE-AC02-65-CH11231.
NR 8
TC 21
Z9 21
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 DEC 1
PY 2008
VL 597
IS 2-3
BP 233
EP 237
DI 10.1016/j.nima.2008.07.137
PG 5
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 388AA
UT WOS:000261991500021
ER
PT J
AU Kamwanna, T
Pasaja, N
Yu, LD
Vilaithong, T
Anders, A
Singkarat, S
AF Kamwanna, T.
Pasaja, N.
Yu, L. D.
Vilaithong, T.
Anders, A.
Singkarat, S.
TI MeV-ion beam analysis of the interface between filtered cathodic
arc-deposited a-carbon and single crystalline silicon
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
INTERACTIONS WITH MATERIALS AND ATOMS
LA English
DT Article
DE Rutherford backscattering spectrometry (RBS); Channeling; Amorphous
carbon; Interface; Filtered cathodic vacuum arc (FCVA)
ID DIAMOND-LIKE CARBON; AMORPHOUS-CARBON; VACUUM-ARC; FILMS; SURFACE;
COATINGS; THIN
AB Amorphous carbon (a-C) films were deposited on Si(I 00) wafers by a filtered cathodic vacuum arc (FCVA) plasma source. A negative electrical bias was applied to the silicon substrate in order to control the incident energy of carbon ions. Effects of the electrical bias on the a-C/Si interface characteristics were investigated by using standard Rutherford backscattering spectrometry (RBS) in the channeling mode with 2.1-MeV He(2+) ions. The shape of the Si surface peaks of the RBS/channeling spectra reflects the degree of interface disorder due to atomic displacement from the bulk position of the Si crystal. Details of the analysis method developed are described. It was found that the width of the a-C/Si interface increases linearly with the substrate bias voltage but not the thickness of the a-C film. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Kamwanna, T.; Yu, L. D.; Vilaithong, T.; Singkarat, S.] Chiang Mai Univ, Fac Sci, Dept Phys, Fast Neutron Res Facil, Chiang Mai 50200, Thailand.
[Pasaja, N.] Mahasarakham Univ, Fac Sci, Dept Phys, Mahasarakham 44150, Thailand.
[Anders, A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Kamwanna, T (reprint author), Chiang Mai Univ, Fac Sci, Dept Phys, Fast Neutron Res Facil, Chiang Mai 50200, Thailand.
EM teerasak@fnrf.science.cmu.ac.th
RI Anders, Andre/B-8580-2009
OI Anders, Andre/0000-0002-5313-6505
FU National Research Council of Thailand (NRCT); International Atomic
Energy Agency (IAEA, Vienna); Development and Promotion of Science and
Technology Talents Project (DPST); Thailand Research
FX The authors would like to express their gratitude to the National
Research Council of Thailand (NRCT) and the International Atomic Energy
Agency (IAEA, Vienna) for providing financial support. T. Kamwanna is
deeply grateful to the scholarship from the Development and Promotion of
Science and Technology Talents Project (DPST). N. Pasaja wishes to thank
the RGJ Ph.D. scholarship of the Thailand Research Fund. We thank Mr. C.
Thongleurm of Institute for Science and Technology Research and
Development, Chiang Mai University for technical assistance.
NR 22
TC 2
Z9 2
U1 0
U2 3
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 DEC
PY 2008
VL 266
IS 24
BP 5175
EP 5179
DI 10.1016/j.nimb.2008.09.013
PG 5
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Atomic, Molecular & Chemical; Physics, Nuclear
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 386VR
UT WOS:000261911200017
ER
PT J
AU Chaudhuri, G
Gupta, SD
Mocko, M
AF Chaudhuri, G.
Gupta, S. Das
Mocko, M.
TI Isoscaling, symmetry energy and thermodynamic models
SO NUCLEAR PHYSICS A
LA English
DT Article
DE Isoscaling; Symmetry energy; Canonical model; Multifragmenation
ID NUCLEAR MULTIFRAGMENTATION
AB The isoscaling parameter usually denoted by a depends upon both the symmetry energy coefficient and the isotopic contents of the dissociating systems. We compute a in theoretical models: first in a simple mean field model and then in thermodynamic models using both grand canonical and canonical ensembles. For finite systems the canonical ensemble is much more appropriate. The model values of alpha are compared with a much used standard formula. Next we turn to cases where in experiments. there are significant deviations from isoscaling. We show that in such cases, although the grand canonical model fails, the canonical model is capable of explaining the data. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Chaudhuri, G.; Gupta, S. Das] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
[Mocko, M.] Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
RP Chaudhuri, G (reprint author), McGill Univ, Dept Phys, 3600 Univ St, Montreal, PQ H3A 2T8, Canada.
EM gargi@physics.mcgill.ca
RI Mocko, Michal/B-1794-2010; Lujan Center, LANL/G-4896-2012;
OI Mocko, Michael/0000-0003-0447-4687
FU Natural Sciences and Engineering Research Council Of Canada; National
Science Foundation [PHY-0606007]
FX This work is supported by Natural Sciences and Engineering Research
Council Of Canada and National Science Foundation under Grant No.
PHY-0606007.
NR 25
TC 12
Z9 13
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 DEC 1
PY 2008
VL 813
IS 3-4
BP 293
EP 312
DI 10.1016/j.nuclphyst.2008.09.004
PG 20
WC Physics, Nuclear
SC Physics
GA 381QE
UT WOS:000261550200007
ER
PT J
AU Hurth, T
AF Hurth, Tobias
TI New physics search in the LHCb era
SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS
LA English
DT Proceedings Paper
CT 2nd Workshop on Theory, Phenomenology and Experiments in Heavy Flavour
Physics
CY JUN 16-18, 2008
CL Anacapri, ITALY
SP Ist Nazl Fis Nucl, Univ Napoli Federico II, Dipartimento Sci Fis
ID FORM-FACTORS; DECAYS; FACTORIZATION; TRANSITIONS; CURRENTS; QUARK
AB We present theoretical and experimental preparations for an indirect search for new physics (NP) using the rare decay (B) over bar (d) -> (K) over bar*(0)mu(+)mu(-). We design new observables with very small theoretical uncertainties and good experimental resolution.
C1 [Hurth, Tobias] CERN, Theory Grp, CH-1211 Geneva 23, Switzerland.
Stanford Univ, SLAC, Stanford, CA 94309 USA.
RP Hurth, T (reprint author), CERN, Theory Grp, CH-1211 Geneva 23, Switzerland.
NR 41
TC 0
Z9 0
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5632
EI 1873-3832
J9 NUCL PHYS B-PROC SUP
JI Nucl. Phys. B-Proc. Suppl.
PD DEC
PY 2008
VL 185
BP 54
EP 61
DI 10.1016/j.nuclphysbps.2008.10.007
PG 8
WC Physics, Particles & Fields
SC Physics
GA 404PF
UT WOS:000263164800010
ER
PT J
AU Papadimitriou, V
AF Papadimitriou, Vaia
CA CDF Collaboration
TI B Physics at CDF
SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS
LA English
DT Proceedings Paper
CT 2nd Workshop on Theory, Phenomenology and Experiments in Heavy Flavour
Physics
CY JUN 16-18, 2008
CL Anacapri, ITALY
SP Ist Nazl Fis Nucl, Univ Napoli Federico II, Dipartimento Sci Fis
ID LIFETIME; DECAYS
AB We present the latest measurements on production, spectroscopy, lifetimes and branching fractions for b-mesons, b-baryons and quarkonia. We also discuss recent results on B-s(0) mixing as well as on CP violation for the B-s(0) meson and for b-baryons. These results were obtained by analyzing data collected by the CDF II detector at Fermilab.
C1 [Papadimitriou, Vaia] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Papadimitriou, V (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA.
NR 27
TC 0
Z9 0
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5632
J9 NUCL PHYS B-PROC SUP
JI Nucl. Phys. B-Proc. Suppl.
PD DEC
PY 2008
VL 185
BP 174
EP 180
DI 10.1016/j.nuclphysbps.2008.10.035
PG 7
WC Physics, Particles & Fields
SC Physics
GA 404PF
UT WOS:000263164800027
ER
PT J
AU Mackenzie, PB
AF Mackenzie, Paul B.
TI Recent results in heavy quark physics from lattice QCD
SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS
LA English
DT Proceedings Paper
CT 2nd Workshop on Theory, Phenomenology and Experiments in Heavy Flavour
Physics
CY JUN 16-18, 2008
CL Anacapri, ITALY
SP Ist Nazl Fis Nucl, Univ Napoli Federico II, Dipartimento Sci Fis
AB I discuss several new results from lattice heavy quark physics that have appeared in the last year.
C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Mackenzie, PB (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA.
EM mackenzie@fnal.gov
NR 16
TC 2
Z9 2
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5632
J9 NUCL PHYS B-PROC SUP
JI Nucl. Phys. B-Proc. Suppl.
PD DEC
PY 2008
VL 185
BP 187
EP 192
DI 10.1016/j.nuclphysbps.2008.10.023
PG 6
WC Physics, Particles & Fields
SC Physics
GA 404PF
UT WOS:000263164800029
ER
PT J
AU Forsberg, CW
AF Forsberg, Charles W.
TI NUCLEAR ENERGY FOR A LOW-CARBON-DIOXIDE-EMISSION TRANSPORTATION SYSTEM
WITH LIQUID FUELS
SO NUCLEAR TECHNOLOGY
LA English
DT Article
DE liquid fuels; shale oil; biofuels; oil refining
ID BIOFUELS; HYDROGENATION; BIOMASS; VISION; FUTURE
AB The two major energy challenges for the United States are to replace crude oil in our transportation system and reduce greenhouse gas emissions. A multilayer strategy to replace oil using nuclear energy and various carbon sources (fossil fuels, biomass, or air) is described that (a) allows the continued use of liquid fuels (ethanol, gasoline, diesel, and jet fuel) in the transport sector, (b) does not require major changes in lifestyle by the consumer, and (c) ultimately eliminates carbon dioxide emissions from the transport sector. Nuclear energy is used to provide electricity, heat, and ultimately hydrogen, with the hydrogen produced by either electrolysis or more advanced thermochemical production methods.
In the near term, nuclear energy can provide low-temperature heat (steam) for ethanol production and electricity for transportation. Midterm options include low-temperature heat and limited quantities of hydrogen for processing cellulosic biomass into liquid fuels (ethanol and lignin-derived hydrocarbons) and providing high-temperature heat for (a) traditional refining and (b) underground oil production and refining. In the longer term, biomass becomes the feedstock for liquid-fuels production, with nuclear energy providing heat and large quantities of hydrogen for complete biomass conversion to hydrocarbon fuels. Nuclear energy could be used to provide over half the total energy required by the transportation system, and the use of oil in the transport sector could potentially be eliminated within several decades.
C1 [Forsberg, Charles W.] MIT, Dept Nucl Sci & Engn, Cambridge, MA 02139 USA.
[Forsberg, Charles W.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Forsberg, CW (reprint author), MIT, Dept Nucl Sci & Engn, 77 Massachusetts Ave,24-207A, Cambridge, MA 02139 USA.
EM cforsber@mit.edu
NR 46
TC 7
Z9 7
U1 1
U2 9
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
J9 NUCL TECHNOL
JI Nucl. Technol.
PD DEC
PY 2008
VL 164
IS 3
BP 348
EP 367
PG 20
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 377DG
UT WOS:000261231300004
ER
PT J
AU Chikazawa, Y
Farmer, M
Grandy, C
AF Chikazawa, Yoshitaka
Farmer, Mitchell
Grandy, Cristoper
TI TECHNOLOGY GAP ANALYSIS ON SODIUM-HEATED STEAM GENERATORS SUPPORTING
ADVANCED BURNER REACTOR DEVELOPMENT
SO NUCLEAR TECHNOLOGY
LA English
DT Review
DE fast reactor; sodium-heated steam generator; sodium-cooled reactor
ID THERMAL-HYDRAULIC ANALYSIS; CR-1 MO STEEL; MATERIAL SELECTION; FERRITIC
STEELS; MAIN COMPONENTS; EXPERIENCE; TUBES; FABRICATION; INSPECTION;
DESIGN
AB The goals of the Global Nuclear Energy Partnership (GNEP) are to expand the use of nuclear energy to meet increasing global energy demand in an environmentally sustainable manner, to address nuclear waste management issues without making separated plutonium, and to address nonproliferation concerns. The Advanced Burner Reactor (ABR) is a fast reactor concept that supports the GNEP fuel cycle system. Since the Integral Fast Reactor (IFR) and Advanced Liquid Metal Reactor (ALMR) projects were terminated in 1994, there has been no major development on sodium-cooled fast reactors in the United States. Therefore, in support of the GNEP ABR program, the history of sodium-cooled reactor development was reviewed to support the initiation of this technology within the United States and to gain an understanding of the technology gaps that may still remain for sodium fast reactor technology.
A sodium-heated steam generator is one of the key components in the fast reactor system since it provides interface between sodium and water. In this gap analysis, information of fabrication and operation experiences in reactor plant steam generators and prototype steam generators was carefully reviewed, for example the Enrico Fermi Atomic Power Plant, the Prototype Fast Reactor (PFR), and Phenix steam generators; the Babcock & Wilcox helical coil tube, 70 MW; the Westinghouse double-wall tube, 70 MW; the Clinch River Breeder Reactor (CRBR) full-scale evaporator; the Superphenix prototype helical coil tube, 45 MW; the SNR-300 prototype straight tube, 50 MW; the SNR-300 prototype helical coil tube, 50 MW; and the Monju prototype helical coil tube, 50 MW The results of this evaluation indicate that straight and helical coil tube steam generators are the best immediate candidate designs for producing reliable steam generators for future sodium fast reactor applications. Though the design comparison suggested that the straight tube type has the advantages of compactness and ease of inspection, prototype tests revealed more technical problems than the helical modules. From the viewpoint of tube material, 21/4Cr steel has been well established, and Incoloy (R) 800,9Cr, and 12Cr steels are available as higher-performance materials.
C1 [Chikazawa, Yoshitaka; Farmer, Mitchell; Grandy, Cristoper] Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA.
RP Chikazawa, Y (reprint author), Japan Atom Energy Agcy, 4002 Narita, Oarai, Ibaraki 3111393, Japan.
EM chikazawa.yoshitaka@jaea.go.jp
FU UChicago Argonne, LLC; DOE Office of Science laboratory
[DE-AC02-06CH11357]
FX The submitted manuscript has been created by UChicago Argonne, LLC,
operator of ANL, a DOE Office of Science laboratory, operated under
contract DE-AC02-06CH11357.
NR 150
TC 1
Z9 1
U1 1
U2 3
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
J9 NUCL TECHNOL
JI Nucl. Technol.
PD DEC
PY 2008
VL 164
IS 3
BP 410
EP 432
PG 23
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 377DG
UT WOS:000261231300007
ER
PT J
AU Wachs, DM
Keiser, DD
Porter, DL
Kisohara, N
AF Wachs, Daniel M.
Keiser, Dennis D.
Porter, Douglas L.
Kisohara, Naoyuki
TI EBR-II SUPERHEATER DUPLEX TUBE EXAMINATION
SO NUCLEAR TECHNOLOGY
LA English
DT Article
DE Charpy impact testing; duplex tube; scanning electron microscopy
examination
AB After 30 yr of operation, the Experimental Breeder Reactor II (EBR-II) Superheater 710 at Argonne National Laboratory-West (now Idaho National Laboratory) was decommissioned. As part of its postservice examination, four duplex tube sections were removed and Charpy impact testing was performed to characterize the crack-arresting ability of nickel-bonded tube interfaces. A scanning electron microscopy (SEM) examination was also performed to characterize and identify changes in bond material microstructure. From room temperature to 400 degrees C, all samples demonstrated ductility and crack-stopping ability similar to that exhibited by beginning-of-life samples. However, at a low temperature (-50 degrees C), samples removed from the lower region of the superheater (near the sodium inlet) failed while those from the upper region (near the sodium outlet) did not. SEM analysis revealed that all the tube-tube interfaces showed evidence of iron diffusion into the nickel braze, which resulted in the formation of a multiphase diffusion structure. Yet, significant void formation was only observed in the bond layer of the tubes removed from the lower region. This may be due to a change in the crystal microstructure of one of the phases within the bond layer that occurs in the 350 to 450 degrees C temperature range, which results in a lower density and the formation of porosity. Apparently, only the samples from the higher-temperature region were exposed to this transition temperature, and the resulting large voids that developed acted as stress concentrators that led to low-temperature embrittlement and failure of the Charpy impact specimens.
C1 [Wachs, Daniel M.; Keiser, Dennis D.; Porter, Douglas L.] Idaho Natl Lab, Nucl Fuels & Mat Div, Idaho Falls, ID 83415 USA.
[Kisohara, Naoyuki] Japan Atom Energy Agcy, FBR Syst Design Grp, Oarai, Ibaraki 3111393, Japan.
RP Wachs, DM (reprint author), Idaho Natl Lab, Nucl Fuels & Mat Div, Idaho Falls, ID 83415 USA.
EM Dennis.Keiser@inl.gov
FU Japan Nuclear Corporation [85040]
FX For their efforts in removing sections of the superheater tubes for
examination, we thankfully acknowledge R. Batten, J. Graham, J.
Wojciechowski, C. Landon, and R. Tessmer. We also acknowledge T.
Totemeier and J. Simpson for their assistance in performing the Charpy
impact tests and Japan Nuclear Corporation for funding through Work for
Others Agreement 85040.
NR 6
TC 1
Z9 1
U1 0
U2 0
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
J9 NUCL TECHNOL
JI Nucl. Technol.
PD DEC
PY 2008
VL 164
IS 3
BP 465
EP 473
PG 9
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 377DG
UT WOS:000261231300010
ER
PT J
AU Rossi, M
Demidov, ON
Anderson, CW
Appella, E
Mazur, SJ
AF Rossi, Matteo
Demidov, Oleg N.
Anderson, Carl W.
Appella, Ettore
Mazur, Sharlyn J.
TI Induction of PPM1D following DNA-damaging treatments through a conserved
p53 response element coincides with a shift in the use of transcription
initiation sites
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID TARGET GENE ACTIVATION; GENOME-WIDE ANALYSIS; WILD-TYPE P53;
BINDING-PROTEIN; HISTONE ACETYLATION; IONIZING-RADIATION; SIGNALING
PATHWAYS; GENOTOXIC STRESS; HUMAN-CELLS; IN-VIVO
AB PPM1D (Wip1), a type PP2C phosphatase, is expressed at low levels in most normal tissues but is overexpressed in several types of cancers. In cells containing wild-type p53, the levels of PPM1D mRNA and protein increase following exposure to genotoxic stress, but the mechanism of regulation by p53 was unknown. PPM1D also has been identified as a CREB-regulated gene due to the presence of a cyclic AMP response element (CRE) in the promoter. Transient transfection and chromatin immunoprecipitation experiments in HCT116 cells were used to characterize a conserved p53 response element located in the 5' untranslated region (UTR) of the PPM1D gene that is required for the p53-dependent induction of transcription from the human PPM1D promoter. CREB binding to the CRE contributes to the regulation of basal expression of PPM1D and directs transcription initiation at upstream sites. Following exposure to ultraviolet (UV) or ionizing radiation, the abundance of transcripts with short 5' UTRs increased in cells containing wild-type p53, indicating increased utilization of downstream transcription initiation sites. In cells containing wild-type p53, exposure to UV resulted in increased PPM1D protein levels even when PPM1D mRNA levels remained constant, indicating post-transcriptional regulation of PPM1D protein levels.
C1 [Rossi, Matteo; Demidov, Oleg N.; Appella, Ettore; Mazur, Sharlyn J.] NCI, Cell Biol Lab, NIH, Bethesda, MD 20892 USA.
[Anderson, Carl W.] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
RP Mazur, SJ (reprint author), NCI, Cell Biol Lab, NIH, Bldg 37, Bethesda, MD 20892 USA.
EM mazurs@mail.nih.gov
OI Demidov, Oleg/0000-0003-4323-7174
FU Intramural Research Program of the National Institutes of Health; Center
for Cancer Research; National Cancer Institute; Brookhaven National
Laboratory; Office of Biological and Environmental Research of the US
Department of Energy
FX The Intramural Research Program of the National Institutes of Health,
Center for Cancer Research, National Cancer Institute; a Laboratory
Directed Research and Development Award at the Brookhaven National
Laboratory and the Low Dose Program of the Office of Biological and
Environmental Research of the US Department of Energy (to C. W. A.).
NR 82
TC 37
Z9 38
U1 0
U2 4
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 DEC
PY 2008
VL 36
IS 22
BP 7168
EP 7180
DI 10.1093/nar/gkn888
PG 13
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 386SY
UT WOS:000261904100026
PM 19015127
ER
PT J
AU Lyness, J
AF Lyness, J. N.
TI Numerical evaluation of a fixed-amplitude variable-phase integral
SO NUMERICAL ALGORITHMS
LA English
DT Article
DE Fixed-amplitude variable-phase integral; Stationary phase asymptotic
expansions; Highly oscillatory integrands; Series inversion; Steepest
descent integration
ID HIGHLY OSCILLATORY INTEGRALS; QUADRATURE
AB We treat the evaluation of a fixed-amplitude variable-phase integral of the form and has moderate differentiability in the integration interval. In particular, we treat in detail the case in which G'(a)=G'(b)=0, but G''(a)G''(b)< 0. For this, we re-derive a standard asymptotic expansion in inverse half-integer inverse powers of k. This derivation is direct, making no explicit appeal to the theories of stationary phase or steepest descent. It provides straightforward expressions for the coefficients in the expansion in terms of derivatives of G at the end-points. Thus it can be used to evaluate the integrals numerically in cases where k is large. We indicate the generalizations to the theory required to cover cases where the oscillator function G has higher order zeros at either or both end-points, but this is not treated in detail. In the simpler case in which G'(a)G'(b)> 0, the same approach would recover a special case of a recent result due to Iserles and Norsett.
C1 [Lyness, J. N.] Argonne Natl Lab, Math & Comp Sci Div, Argonne, IL 60439 USA.
[Lyness, J. N.] Univ New S Wales, Sch Math, Sydney, NSW 2052, Australia.
RP Lyness, J (reprint author), Argonne Natl Lab, Math & Comp Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM lyness@mcs.anl.gov
FU Mathematical, Information, and Computational Sciences Division; Office
of Advanced Scientific Computing Research; Office of Science; U.S.
Department of Energy [DE-AC02-06CH11357]
FX The author was supported by the Mathematical, Information, and
Computational Sciences Division subprogram of the Office of Advanced
Scientific Computing Research, Office of Science, U.S. Department of
Energy, under Contract DE-AC02-06CH11357.
NR 7
TC 5
Z9 5
U1 0
U2 0
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1017-1398
J9 NUMER ALGORITHMS
JI Numer. Algorithms
PD DEC
PY 2008
VL 49
IS 1-4
BP 235
EP 249
DI 10.1007/s11075-008-9166-y
PG 15
WC Mathematics, Applied
SC Mathematics
GA 368KA
UT WOS:000260618800016
ER
PT J
AU Ringler, T
Ju, LL
Gunzburger, M
AF Ringler, Todd
Ju, Lili
Gunzburger, Max
TI A multiresolution method for climate system modeling: application of
spherical centroidal Voronoi tessellations
SO OCEAN DYNAMICS
LA English
DT Article
DE Voronoi diagram; Delaunay triangulation; Climate modeling;
Multiresolution
ID FINITE-ELEMENT METHODS; SHALLOW-WATER MODEL; RADAR INTERFEROMETRY;
VOLUME METHODS; ICE-SHEET; OCEAN; MESHES; GRIDS; 1/10-DEGREES;
SIMULATION
AB During the next decade and beyond, climate system models will be challenged to resolve scales and processes that are far beyond their current scope. Each climate system component has its prototypical example of an unresolved process that may strongly influence the global climate system, ranging from eddy activity within ocean models, to ice streams within ice sheet models, to surface hydrological processes within land system models, to cloud processes within atmosphere models. These new demands will almost certainly result in the develop of multiresolution schemes that are able, at least regionally, to faithfully simulate these fine-scale processes. Spherical centroidal Voronoi tessellations (SCVTs) offer one potential path toward the development of a robust, multiresolution climate system model components. SCVTs allow for the generation of high-quality Voronoi diagrams and Delaunay triangulations through the use of an intuitive, user-defined density function. In each of the examples provided, this method results in high-quality meshes where the quality measures are guaranteed to improve as the number of nodes is increased. Real-world examples are developed for the Greenland ice sheet and the North Atlantic ocean. Idealized examples are developed for ocean-ice shelf interaction and for regional atmospheric modeling. In addition to defining, developing, and exhibiting SCVTs, we pair this mesh generation technique with a previously developed finite-volume method. Our numerical example is based on the nonlinear, shallow-water equations spanning the entire surface of the sphere. This example is used to elucidate both the po tential benefits of this multiresolution method and the challenges ahead.
C1 [Ringler, Todd] Los Alamos Natl Lab, Div Theoret, Fluid Dynam Grp T3, Los Alamos, NM 87545 USA.
[Ju, Lili] Univ S Carolina, Dept Math, Columbia, SC 29208 USA.
[Gunzburger, Max] Florida State Univ, Sch Computat Sci, Dirac Sci Lib 400, Tallahassee, FL 32306 USA.
RP Ringler, T (reprint author), Los Alamos Natl Lab, Div Theoret, Fluid Dynam Grp T3, Los Alamos, NM 87545 USA.
EM ringler@lanl.gov; ju@math.sc.edu; gunzburg@scs.fsu.edu
FU DOE Office of Science Climate Change Prediction Program
[DE-FG02-07ER64431, DE-FG02-07ER64432, DOE 07SCPF152]
FX This work was supported by the DOE Office of Science Climate Change
Prediction Program through DE-FG02-07ER64431, DE-FG02-07ER64432, and DOE
07SCPF152. The authors would like to thank Dr. Sebastien Legrand and two
anonymous reviewers for their constructive comments.
NR 43
TC 49
Z9 50
U1 0
U2 6
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 1616-7341
J9 OCEAN DYNAM
JI Ocean Dyn.
PD DEC
PY 2008
VL 58
IS 5-6
BP 475
EP 498
DI 10.1007/s10236-008-0157-2
PG 24
WC Oceanography
SC Oceanography
GA 382CB
UT WOS:000261581500010
ER
PT J
AU Nadiga, BT
Aurnou, JM
AF Nadiga, Balasubramanya T.
Aurnou, Jonathan M.
TI HANDS-ON OCEANOGRAPHY: A Tabletop Demonstration of Atmospheric Dynamics
Baroclinic Instability
SO OCEANOGRAPHY
LA English
DT Article
C1 [Nadiga, Balasubramanya T.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Aurnou, Jonathan M.] Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90024 USA.
RP Nadiga, BT (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM balu@lanl.gov
NR 7
TC 4
Z9 4
U1 0
U2 1
PU OCEANOGRAPHY SOC
PI ROCKVILLE
PA P.O. BOX 1931, ROCKVILLE, MD USA
SN 1042-8275
J9 OCEANOGRAPHY
JI Oceanography
PD DEC
PY 2008
VL 21
IS 4
BP 196
EP 201
PG 6
WC Oceanography
SC Oceanography
GA 383UL
UT WOS:000261699100034
ER
PT J
AU Yellampalle, B
Kim, K
Taylor, AJ
AF Yellampalle, Balakishore
Kim, KiYong
Taylor, Antoniette J.
TI Amplitude ambiguities in second-harmonic generation frequency-resolved
optical gating: erratum (vol 32, pg 3558, 2007)
SO OPTICS LETTERS
LA English
DT Correction
C1 [Yellampalle, Balakishore; Taylor, Antoniette J.] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA.
RP Yellampalle, B (reprint author), Los Alamos Natl Lab, Ctr Integrated Nanotechnol, POB 1663, Los Alamos, NM 87545 USA.
EM balakishorey@gmail.com
NR 2
TC 4
Z9 4
U1 0
U2 1
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 DEC 1
PY 2008
VL 33
IS 23
BP 2854
EP 2854
DI 10.1364/OL.33.002854
PG 1
WC Optics
SC Optics
GA 391BC
UT WOS:000262206500044
ER
PT J
AU Fuchs, RK
Allen, MR
Condon, KW
Reinwald, S
Miller, LM
McClenathan, D
Keck, B
Phipps, RJ
Burr, DB
AF Fuchs, R. K.
Allen, M. R.
Condon, K. W.
Reinwald, S.
Miller, L. M.
McClenathan, D.
Keck, B.
Phipps, R. J.
Burr, D. B.
TI Calculating clinically relevant drug doses to use in animal studies
SO OSTEOPOROSIS INTERNATIONAL
LA English
DT Letter
ID FRACTURE RISK REDUCTION; STRONTIUM RANELATE; VERTEBRAL FRACTURE;
POSTMENOPAUSAL OSTEOPOROSIS; BONE-FORMATION; WOMEN; RATS
C1 [Fuchs, R. K.] Indiana Univ, Dept Phys Therapy, Sch Hlth & Rehabil Sci, Indianapolis, IN 46204 USA.
[Fuchs, R. K.; Allen, M. R.; Condon, K. W.; Reinwald, S.; Burr, D. B.] Indiana Univ, Sch Med, Dept Anat & Cell Biol, Indianapolis, IN 46204 USA.
[Miller, L. M.] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
[McClenathan, D.; Keck, B.; Phipps, R. J.] Procter & Gamble Pharmaceut, Mason, OH USA.
[Burr, D. B.] Indiana Univ, Sch Med, Dept Orthopaed Surg, Indianapolis, IN 46204 USA.
RP Fuchs, RK (reprint author), Indiana Univ, Dept Phys Therapy, Sch Hlth & Rehabil Sci, Indianapolis, IN 46204 USA.
EM rfuchs@iupui.edu; matallen@iupui.edu; kcondon@iupui.edu;
sreinwald@iupui.edu; lmiller@bnl.gov; mcclenathan.dm@pg.com;
keck.bd@pg.com; phipps.rj@pg.com; dburr@iupui.edu
RI Allen, Matthew/A-8799-2015
OI Allen, Matthew/0000-0002-1174-9004
NR 9
TC 4
Z9 4
U1 0
U2 2
PU SPRINGER LONDON LTD
PI ARTINGTON
PA ASHBOURNE HOUSE, THE GUILDWAY, OLD PORTSMOUTH ROAD, ARTINGTON GU3 1LP,
GUILDFORD, ENGLAND
SN 0937-941X
J9 OSTEOPOROSIS INT
JI Osteoporosis Int.
PD DEC
PY 2008
VL 19
IS 12
BP 1815
EP 1817
DI 10.1007/s00198-008-0741-9
PG 3
WC Endocrinology & Metabolism
SC Endocrinology & Metabolism
GA 366WR
UT WOS:000260514800019
ER
PT J
AU Del-Castillo-Negrete, D
Gonchar, VY
Chechkin, AV
AF del-Castillo-Negrete, D.
Gonchar, V. Yu.
Chechkin, A. V.
TI Fluctuation-driven directed transport in the presence of Levy flights
SO PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
LA English
DT Article
DE Levy flights; Langevin equation; Fractional Fokker-Planck equation
ID EXTERNAL FORCE-FIELDS; ANOMALOUS DIFFUSION; EQUATIONS; LANGEVIN; NOISE;
DISTRIBUTIONS; DYNAMICS; KINETICS; WALKS
AB The role of Levy flights on fluctuation-driven transport in time independent periodic potentials with broken spatial symmetry is studied. Two complementary approaches are followed. The first one is based on a generalized Langevin model describing overdamped dynamics in a ratchet type external potential driven by Levy white noise with stability index a in the range 1 < alpha < 2. The second approach is based on the space fractional Fokker-Planck equation describing the corresponding probability density function (PDF) of particle displacements. It is observed that, even in the absence of an external tilting force or a bias in the noise, the Levy flights drive the system out of the thermodynamic equilibrium and generate an up-hill current (i.e., a current in the direction of the steeper side of the asymmetric potential). For small values of the noise intensity there is an optimal value of alpha yielding the maximum current. The direction and magnitude of the current can be manipulated by changing the Levy noise asymmetry and the potential asymmetry. For a sharply localized initial condition, the PDF of staying at the minimum of the potential exhibits scaling behavior in time with an exponent bigger than the -1/alpha exponent corresponding to the force free case. (C) 2008 Elsevier B.V. All rights reserved.
C1 [del-Castillo-Negrete, D.] Oak Ridge Natl Lab, Div Fus Energy, Oak Ridge, TN 37831 USA.
[Gonchar, V. Yu.; Chechkin, A. V.] Inst Theoret Phys NSC KIPT, UA-61108 Kharkov, Ukraine.
RP Del-Castillo-Negrete, D (reprint author), Oak Ridge Natl Lab, Div Fus Energy, Oak Ridge, TN 37831 USA.
EM delcastillod@ornl.gov
RI Chechkin, Aleksei/D-2147-2015;
OI del-Castillo-Negrete, Diego/0000-0001-7183-801X
FU Oak Ridge National Laboratory; US Department of Energy
[DE-AC05-OOOR22725]
FX D dCN acknowledge financial support from the Oak Ridge National
Laboratory, managed by UT-Battelle, LLC, for the US Department of Energy
under contract DE-AC05-OOOR22725.
NR 56
TC 25
Z9 26
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-4371
J9 PHYSICA A
JI Physica A
PD DEC 1
PY 2008
VL 387
IS 27
BP 6693
EP 6704
DI 10.1016/j.physa.2008.08.034
PG 12
WC Physics, Multidisciplinary
SC Physics
GA 379NA
UT WOS:000261402000001
ER
PT J
AU Haywood, T
Oh, SH
Kebede, A
Pai, DM
Sankar, J
Christen, DK
Pennycook, SJ
Kumar, D
AF Haywood, Talisha
Oh, Sang Ho
Kebede, Abebe
Pai, Devdas M.
Sankar, Jag
Christen, David K.
Pennycook, Stephen J.
Kumar, Dhananjay
TI Structural and flux-pinning properties of laser ablated
YBa(2)Cu(3)O(7-delta) thin films: Effects of self-assembled CeO(2)
nanodots on LaAlO(3) substrates
SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
LA English
DT Article
DE Nanodots; Critical current density; Pulsed laser deposition
ID SUSCEPTIBILITY; DISPERSIONS; DEFECTS; CENTERS; DISKS
AB Self-assembled nanodots of CeO(2) on (100) LaAlO(3) substrates, generated in situ by means of a pulsed laser deposition method prior to the deposition of YBa(2)Cu(3)O(7-delta) (YBCO) films, have been used to modify the superconducting properties of resulting YBCO films. Structural characterization has indicated that CeO(2) layers grow via van der Merwe three-dimensional mode and the islands eventually acquire a pancake type of structure with lateral dimension several times larger than vertical dimension. The three-dimensional growth of CeO(2) islands with (100) preferred orientation is believed to be associated with its surface energy anisotropy. The magnetization versus temperature and magnetization versus field measurements and analysis have suggested that CeO(2) can affect the superconducting properties of YBCO films favorably or adversely depending on the density of CeO(2) nanodots on the substrate surfaces prior to the deposition of YBCO films. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Oh, Sang Ho; Kebede, Abebe; Pai, Devdas M.; Sankar, Jag; Kumar, Dhananjay] N Carolina Agr & Tech State Univ, Dept Mech & Chem Engn, Greensboro, NC 27411 USA.
[Haywood, Talisha] N Carolina Agr & Tech State Univ, Dept Phys, Greensboro, NC 27411 USA.
[Oh, Sang Ho; Christen, David K.; Pennycook, Stephen J.; Kumar, Dhananjay] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Kumar, D (reprint author), N Carolina Agr & Tech State Univ, Dept Mech & Chem Engn, Greensboro, NC 27411 USA.
EM dkumar@ncat.edu
FU NSF-NIRT [DMR-0403480]; Center for Advanced Materials and Smart
Structures
FX This work was supported by a NSF-NIRT Grant DMR-0403480 and by the
Center for Advanced Materials and Smart Structures.
NR 13
TC 4
Z9 4
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0921-4534
J9 PHYSICA C
JI Physica C
PD DEC 1
PY 2008
VL 468
IS 23
BP 2313
EP 2316
DI 10.1016/j.physc.2008.07.008
PG 4
WC Physics, Applied
SC Physics
GA 377YV
UT WOS:000261289200003
ER
PT J
AU Counts, WA
Friak, M
Battaile, CC
Raabe, D
Neugebauer, J
AF Counts, W. A.
Friak, M.
Battaile, C. C.
Raabe, D.
Neugebauer, J.
TI A comparison of polycrystalline elastic properties computed by analytic
homogenization schemes and FEM
SO PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
LA English
DT Article; Proceedings Paper
CT Symposium on Modern Developments in Multiphysics Materials Simulations
CY 2008
CL Berlin, GERMANY
ID SINGLE-CRYSTAL; AB-INITIO
AB Body-center-cubic (BCC) magnesium-lithium alloys are a promising light-weight structural material. As a first step in a theoretically guided materials design strategy single crystal elastic coefficients for BCC magnesium-lithium alloys with different compositions were computed using ab initio methods. These single crystal elastic coefficients were then used to predict the corresponding polycrystalline elastic properties using various analytic homogenization techniques (Voigt, Reuss, and a self-consistent approach) as well as the finite element method. As expected, the Voigt and Reuss bounds form the upper and lower bounds on the polycrystalline elastic properties, which the predicted values of the self-consistent approach and finite element approaches fall in between. Additionally, the difference between the polycrystalline elastic properties derived from the self-consistent approach and the finite element method is small illustrating the power and value of the self-consistent approach for non-textured materials. (c) 2008 WILE-VCH Verlag GmbH & Co. KGaA, Weinheim
C1 [Counts, W. A.; Friak, M.; Raabe, D.; Neugebauer, J.] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany.
[Battaile, C. C.] Sandia Natl Labs, Computat Mat Sci & Engn Dept, Albuquerque, NM 87185 USA.
RP Raabe, D (reprint author), Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany.
EM d.raabe@mpie.de
RI Friak, Martin/F-9741-2014; Raabe, Dierk/A-6470-2009; Neugebauer,
Joerg/K-2041-2015
OI Raabe, Dierk/0000-0003-0194-6124; Neugebauer, Joerg/0000-0002-7903-2472
NR 15
TC 14
Z9 14
U1 1
U2 2
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA POSTFACH 101161, 69451 WEINHEIM, GERMANY
SN 0370-1972
EI 1521-3951
J9 PHYS STATUS SOLIDI B
JI Phys. Status Solidi B-Basic Solid State Phys.
PD DEC
PY 2008
VL 245
IS 12
BP 2630
EP 2635
DI 10.1002/pssb.200844226
PG 6
WC Physics, Condensed Matter
SC Physics
GA 384GY
UT WOS:000261734500003
ER
PT J
AU Haines, BM
Aranson, IS
Berlyand, L
Karpeev, DA
AF Haines, Brian M.
Aranson, Igor S.
Berlyand, Leonid
Karpeev, Dmitry A.
TI Effective viscosity of dilute bacterial suspensions: a two-dimensional
model
SO PHYSICAL BIOLOGY
LA English
DT Article
ID SPHERICAL-PARTICLES; MOTION; ORDER; MICROORGANISMS; TRANSITION; STRESS;
SYSTEM; FLUID
AB Suspensions of self-propelled particles are studied in the framework of two-dimensional (2D) Stokesean hydrodynamics. A formula is obtained for the effective viscosity of such suspensions in the limit of small concentrations. This formula includes the two terms that are found in the 2D version of Einstein's classical result for passive suspensions. To this, the main result of the paper is added, an additional term due to self-propulsion which depends on the physical and geometric properties of the active suspension. This term explains the experimental observation of a decrease in effective viscosity in active suspensions.
C1 [Haines, Brian M.; Berlyand, Leonid] Penn State Univ, Dept Math, University Pk, PA 16802 USA.
[Aranson, Igor S.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Karpeev, Dmitry A.] Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA.
RP Haines, BM (reprint author), Penn State Univ, Dept Math, 418 McAllister Bldg, University Pk, PA 16802 USA.
RI Aranson, Igor/I-4060-2013
NR 36
TC 30
Z9 30
U1 2
U2 17
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 1478-3967
J9 PHYS BIOL
JI Phys. Biol.
PD DEC
PY 2008
VL 5
IS 4
AR 046003
DI 10.1088/1478-3975/5/4/046003
PG 9
WC Biochemistry & Molecular Biology; Biophysics
SC Biochemistry & Molecular Biology; Biophysics
GA 385WD
UT WOS:000261843400005
PM 19029599
ER
PT J
AU Csanak, G
Kilcrease, DP
Fursa, DV
Bray, I
AF Csanak, G.
Kilcrease, D. P.
Fursa, D. V.
Bray, I.
TI Creation, destruction, and transfer of atomic multipole moments by
electron scattering: Quantum-mechanical treatment
SO PHYSICAL REVIEW A
LA English
DT Article
DE atom-electron collisions; atomic moments; barium; electron impact
excitation; hydrogen neutral atoms; quantum theory
ID IMPACT EXCITATION; CROSS-SECTIONS; SPIN POLARIZATION; DENSITY MATRIX;
GROUND-STATE; P-1 STATE; BA ATOMS; RELAXATION; COLLISIONS; HELIUM
AB Using the wave-packet propagation method of Rodberg and Thaler and the density matrix method of Fano and Blum, we have defined by completely quantum-mechanical methods the cross sections for the creation, destruction, and transfer of atomic multipole moments by both elastic and inelastic scattering of electrons by atomic targets. All cross sections obtained quantum mechanically, except for the coherence transfer cross sections, agree in form with those obtained semiclassically by Fujimoto and co-workers. We also used the converged close-coupling (CCC) method to calculate numerically some of the above cross sections for selected transitions in electron scattering from hydrogen and barium atoms.
C1 [Csanak, G.; Kilcrease, D. P.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Fursa, D. V.; Bray, I.] Curtin Univ Technol, ARC Ctr Excellence Antimatter Matter Studies, Perth, WA 6845, Australia.
RP Csanak, G (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RI Fursa, Dmitry/C-2301-2009; Bray, Igor/B-8586-2009;
OI Fursa, Dmitry/0000-0002-3951-9016; Bray, Igor/0000-0001-7554-8044;
Kilcrease, David/0000-0002-2319-5934
NR 60
TC 7
Z9 7
U1 0
U2 1
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 DEC
PY 2008
VL 78
IS 6
AR 062716
DI 10.1103/PhysRevA.78.062716
PG 15
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 391OK
UT WOS:000262242400107
ER
PT J
AU Reinhold, CO
Yoshida, S
Burgdorfer, J
Mestayer, JJ
Wyker, B
Lancaster, JC
Dunning, FB
AF Reinhold, C. O.
Yoshida, S.
Burgdoerfer, J.
Mestayer, J. J.
Wyker, B.
Lancaster, J. C.
Dunning, F. B.
TI Tailoring very-high-n circular wave packets
SO PHYSICAL REVIEW A
LA English
DT Article
DE atom-photon collisions; Rydberg states
ID CLASSICAL-THEORY; HYDROGEN-ATOMS; RYDBERG STATES; DYNAMICS; FIELDS
AB We describe a protocol to generate transiently localized circular wave packets in very-high-n Rydberg states. These are created from strongly polarized quasi-one-dimensional Rydberg states by applying a transverse pulsed electric field. The resulting wave packet becomes transiently localized as the result of focusing and travels in a nearly circular Bohr-like orbit around the nucleus for several orbital periods. The localization properties can be controlled by carefully choosing the shape of the field pulse, in particular, its rise and fall times. Remarkably, the wave packets exhibit classical revivals after the initial dephasing on time scales shorter than those expected for quantum revivals.
C1 [Reinhold, C. O.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
[Reinhold, C. O.; Burgdoerfer, J.] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA.
[Yoshida, S.; Burgdoerfer, J.] Vienna Univ Technol, Inst Theoret Phys, A-1040 Vienna, Austria.
[Mestayer, J. J.; Wyker, B.; Lancaster, J. C.; Dunning, F. B.] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA.
[Mestayer, J. J.; Wyker, B.; Lancaster, J. C.; Dunning, F. B.] Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA.
RP Reinhold, CO (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
OI Reinhold, Carlos/0000-0003-0100-4962
FU NSF [0650732]; Robert A. Welch Foundation [C-0734]; UT-Batelle LLC
[AC05-00OR22725]; FWF (Austria) [SFB016]
FX Research supported by the NSF under Grant No. 0650732, the Robert A.
Welch Foundation under Grant No. C-0734, the OBES, U. S. DOE to ORNL,
which is managed by the UT-Batelle LLC under Contract No.
AC05-00OR22725, and by the FWF (Austria) under Contact No. SFB016.
NR 25
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 DEC
PY 2008
VL 78
IS 6
AR 063413
DI 10.1103/PhysRevA.78.063413
PN B
PG 9
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 391OV
UT WOS:000262243500015
ER
PT J
AU Sharma, R
Reddy, S
AF Sharma, Rishi
Reddy, Sanjay
TI Mean-field analysis of pairing in asymmetric Fermi systems at finite
temperature
SO PHYSICAL REVIEW A
LA English
DT Article
DE chemical potential; fermion systems; phase diagrams; phase
transformations; superfluidity
ID LARKIN-OVCHINNIKOV PHASES; EXCHANGE FIELD; NUCLEAR-MATTER;
SUPERCONDUCTIVITY; SUPERFLUIDITY; CONDENSATE; TRANSITION; DIAGRAM;
STATE; GAS
AB We study the phase diagram of a two component Fermi system with a weak attractive interaction. Our analysis includes the leading order Hartree energy shifts and pairing correlations at finite temperature and chemical potential difference between the two fermion species. We show that in an asymmetric system, the Hartree shift to the single particle energies is important for the phase competition between normal and superfluid phase and can change the phase transition curve qualitatively. At large chemical potential asymmetry we find that a somewhat fragile superfluid state can be favored due to finite-temperature effects. We also investigate the transition between the normal phase and an inhomogeneous superfluid phase to study how gradient instabilities evolve with temperature and asymmetry. Finally, we adopt our analysis to study the density profiles of similar asymmetric Fermi systems that are being observed in cold-atom experiments.
C1 [Sharma, Rishi; Reddy, Sanjay] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Sharma, R (reprint author), Los Alamos Natl Lab, Div Theoret, MS B283, Los Alamos, NM 87545 USA.
EM rishi@lanl.gov; reddy@lanl.gov
FU Department of Energy [W-7405-ENG-36]; LANL/LDRD Program
FX R. S. thanks Krishna Rajagopal for discussions and suggestions. The
authors also acknowledge discussions with Michael Forbes, Joe Carlson,
Mark Alford, and Alex Gezerlis. The authors also thank an anonymous
referee for valuable suggestions. This research was supported by the
Department of Energy under Contract No. W-7405-ENG-36 and by the
LANL/LDRD Program.
NR 42
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 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD DEC
PY 2008
VL 78
IS 6
AR 063609
DI 10.1103/PhysRevA.78.063609
PN B
PG 12
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 391OV
UT WOS:000262243500035
ER
PT J
AU Strecker, KE
Chandler, DW
AF Strecker, Kevin E.
Chandler, David W.
TI Kinematic production of isolated millikelvin molecules
SO PHYSICAL REVIEW A
LA English
DT Article
DE atom-molecule collisions; molecular beams; nitrogen compounds; radiation
pressure; rotational states; vibrational states
ID BOSE-EINSTEIN CONDENSATE; FERMI GAS; ATOMS; COLLISIONS; ARGON
AB Recently we developed a technique for producing cold molecules from a supersonic molecular beam via single collisions with a supersonic atomic beam [M. S. Elioff, J. J. Valentini, and D. W. Chandler, Science 302, 1940 (2003)]. This cooling technique necessarily produces the cold molecules at the relatively high density crossing of the atomic and molecular beams. In previous reports, secondary glancing collisions with the remnant atomic and molecular beams lead to rapid depletion of the cold molecules limiting the observation time to less than 10 mu s with an estimated temperature of 440 mK. Here we present experimental conditions for the kinematic cooling technique which overcome the limitations of the previous experiments. We demonstrate the success of this experiment for the production of cold nitric oxide (NO) in the ground vibrational, j=7.5 rotational, state in order to compare with our previously reported data. With the present setup, we are able to extract the cold molecules from the pulsed molecular and atomic beams and we observe these cold NO(X)(j=7.5) persisting for over 150 mu s. This long observation time demonstrates our ability to temporally and spatially separate the cold molecules from the parent atomic and molecular beams, simultaneously allowing for a better measurement of the final average velocity for the kinematically cooled molecules. From the data we find a final average velocity of the NO(X)(j=7.5) of approximately 4.5 m/s, consistent with simulations. The final observed average velocity is equated to a temperature of approximately 35 mK, over an order of magnitude colder than our previous measurements.
C1 [Strecker, Kevin E.; Chandler, David W.] Sandia Natl Labs, Livermore, CA 94551 USA.
RP Strecker, KE (reprint author), Sandia Natl Labs, Livermore, CA 94551 USA.
EM kstreck@sandia.gov
NR 29
TC 14
Z9 14
U1 1
U2 8
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 DEC
PY 2008
VL 78
IS 6
AR 063406
DI 10.1103/PhysRevA.78.063406
PG 5
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 391OV
UT WOS:000262243500008
ER
PT J
AU Varma, HR
Pan, L
Beck, DR
Santra, R
AF Varma, Hari R.
Pan, Lin
Beck, Donald R.
Santra, Robin
TI X-ray-absorption near-edge structure of laser-dressed neon
SO PHYSICAL REVIEW A
LA English
DT Article
DE atom-photon collisions; configuration interactions; Dirac-Fock
calculations; dressed states; neon; perturbation theory; XANES
ID ELECTRON-ENERGY-LOSS; AUGER EMISSION; EXCITATION; DECAY; STATE
AB Using an improved value for the energy splitting between the 1s(-1)3s (1)S(0) and 1s(-1)3p (1)P(1) states, electromagnetically induced transparency for x rays at the 1s -> 3p resonance in Ne is reassessed. The energy splitting between the 1s(-1)3s (1)S(0) and 1s(-1)3p (1)P(1) states is calculated with two independent approaches. In the first approach, first-order nonrelativistic many-body perturbation theory is employed. In the second approach, the Dirac-Fock method is combined with the relativistic configuration interaction method. Both approaches give an energy splitting of 1.88 eV. The calculated x-ray absorption near-edge structure of laser-dressed Ne agrees closely with an earlier prediction. It may therefore be expected that at a laser intensity of 10(13) W/cm(2), the 1s -> 3p x-ray absorption cross section of Ne is suppressed by more than an order of magnitude.
C1 [Varma, Hari R.; Santra, Robin] Argonne Natl Lab, Argonne, IL 60439 USA.
[Pan, Lin; Beck, Donald R.] Michigan Technol Univ, Dept Phys, Houghton, MI 49931 USA.
[Santra, Robin] Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
RP Varma, HR (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM rsantra@anl.gov
RI Santra, Robin/E-8332-2014
OI Santra, Robin/0000-0002-1442-9815
FU Office of Basic Energy Sciences; Office of Science; U. S. Department of
Energy [DE-AC02-06CH11357]; National Science Foundation [PHY-0097111]
FX We thank Christian Bressler, Christian Buth, Elliot P. Kanter, Stephen
H. Southworth, Wilfried Wurth, and Linda Young for helpful discussions.
This work was supported in part by the Office of Basic Energy Sciences,
Office of Science, U. S. Department of Energy, under Contract No.
DE-AC02-06CH11357. Lin Pan and Donald R. Beck gratefully acknowledge the
support from the National Science Foundation, Grant No. PHY-0097111.
NR 19
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 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD DEC
PY 2008
VL 78
IS 6
AR 065401
DI 10.1103/PhysRevA.78.065401
PG 4
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 391OV
UT WOS:000262243500094
ER
PT J
AU Wall, TE
Kanem, JF
Hudson, JJ
Sauer, BE
Cho, D
Boshier, MG
Hinds, EA
Tarbutt, MR
AF Wall, T. E.
Kanem, J. F.
Hudson, J. J.
Sauer, B. E.
Cho, D.
Boshier, M. G.
Hinds, E. A.
Tarbutt, M. R.
TI Lifetime of the A(v(')=0) state and Franck-Condon factor of the A-X(0-0)
transition of CaF measured by the saturation of laser-induced
fluorescence
SO PHYSICAL REVIEW A
LA English
DT Article
DE calcium compounds; excited states; fluorescence; hyperfine structure;
radiative lifetimes; spectral line broadening
ID HYPERFINE INTERACTIONS; SPIN-ROTATION; MOLECULES
AB We describe a method for determining the radiative decay properties of a molecule by studying the saturation of laser-induced fluorescence and the associated power broadening of spectral lines. The fluorescence saturates because the molecules decay to states that are not resonant with the laser. The amplitudes and widths of two hyperfine components of a spectral line are measured over a range of laser intensities and the results compared to a model of the laser-molecule interaction. Using this method we measure the lifetime of the A(v(')=0) state of CaF to be tau=19.2 +/- 0.7 ns, and the Franck-Condon factor for the transition to the X(v=0) state to be Z=0.987(-0.019)(+0.013). In addition, our analysis provides a measure of the hyperfine interval in the lowest-lying state of A(v(')=0), Delta(e)=4.8 +/- 1.1 MHz.
C1 [Wall, T. E.; Kanem, J. F.; Hudson, J. J.; Sauer, B. E.; Hinds, E. A.; Tarbutt, M. R.] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Ctr Cold Matter, London SW7 2AZ, England.
[Cho, D.] Korea Univ, Dept Phys, Seoul 136713, South Korea.
[Boshier, M. G.] Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA.
RP Wall, TE (reprint author), Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Ctr Cold Matter, Prince Consort Rd, London SW7 2AZ, England.
RI Hudson, Jony/A-2386-2011; Wall, Thomas/C-5218-2012; Boshier,
Malcolm/A-2128-2017;
OI Wall, Thomas/0000-0001-6012-0432; Boshier, Malcolm/0000-0003-0769-1927;
Tarbutt, Michael/0000-0003-2713-9531
NR 17
TC 26
Z9 26
U1 0
U2 7
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 DEC
PY 2008
VL 78
IS 6
AR 062509
DI 10.1103/PhysRevA.78.062509
PN A
PG 10
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 391OK
UT WOS:000262242400089
ER
PT J
AU Yoshida, S
Reinhold, CO
Burgdorfer, J
Zhao, W
Mestayer, JJ
Lancaster, JC
Dunning, FB
AF Yoshida, S.
Reinhold, C. O.
Burgdoerfer, J.
Zhao, W.
Mestayer, J. J.
Lancaster, J. C.
Dunning, F. B.
TI Extracting irreversible dephasing rates from electric dipole echoes in
Rydberg Stark wave packets
SO PHYSICAL REVIEW A
LA English
DT Article
DE atomic moments; electric moments; Rydberg states; Stark effect;
stochastic processes
ID HYDROGEN-ATOMS; STATES; VIEW
AB The precession of an electric dipole moment in an external electric field can be reversed by reversing the field direction. This time-reversal operation allows study of coherence in the time evolution of Rydberg Stark wave packets by measuring the resulting echoes. Different sources of reversible dephasing and irreversible dephasing, i.e., decoherence, are discussed in detail. Stochastic interactions with the environment are simulated in a controlled manner by using artificially synthesized noise. The rate of irreversible dephasing is determined from the reduction of the echo amplitude under multiple field reversals.
C1 [Yoshida, S.] Vienna Univ Technol, Inst Theoret Phys, A-1040 Vienna, Austria.
[Reinhold, C. O.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
[Reinhold, C. O.; Burgdoerfer, J.] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA.
[Zhao, W.; Mestayer, J. J.; Lancaster, J. C.; Dunning, F. B.] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA.
[Zhao, W.; Mestayer, J. J.; Lancaster, J. C.; Dunning, F. B.] Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA.
RP Yoshida, S (reprint author), Vienna Univ Technol, Inst Theoret Phys, A-1040 Vienna, Austria.
OI Reinhold, Carlos/0000-0003-0100-4962
FU OBES; U. S. DOE; UT-Batelle LLC [DE-4C05-00OR22725]; NSF [PHY-0650732];
Robert A. Welch Foundation [C-0734]; [FWF-SFB016]
FX S.Y. and J. B. acknowledge support by the FWF-SFB016 (Austria). C. O. R.
acknowledges support by the OBES and U. S. DOE to ORNL, which is managed
by the UT-Batelle LLC under Contract No. DE-4C05-00OR22725. Research at
Rice is supported by the NSF under Grant No. PHY-0650732 and by the
Robert A. Welch Foundation under Grant No. C-0734.
NR 26
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 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD DEC
PY 2008
VL 78
IS 6
AR 063414
DI 10.1103/PhysRevA.78.063414
PN B
PG 15
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 391OV
UT WOS:000262243500016
ER
PT J
AU Zhang, H
Rolles, D
Pesic, ZD
Bozek, JD
Berrah, N
AF Zhang, H.
Rolles, D.
Pesic, Z. D.
Bozek, J. D.
Berrah, N.
TI Angular distributions of inner-shell photoelectrons from rare-gas
clusters
SO PHYSICAL REVIEW A
LA English
DT Article
DE argon; atomic clusters; fine structure; krypton; molecule-photon
collisions; photoelectron spectra; photoionisation; time of flight
spectra; xenon
ID CORE-LEVEL PHOTOELECTRON; FREE ARGON CLUSTERS; X-RAY-ABSORPTION; ENERGY
SHIFTS; SIZE; SPECTROSCOPY; AR; EXCITATION; KRYPTON; STATES
AB The photoionization of Ar, Kr, and Xe rare-gas clusters was investigated using angle-resolved time-of-flight photoelectron spectroscopy. Fine-structure-resolved photoelectron angular distributions were determined for the Ar 2p, Kr 3d, and Xe 4d core levels and the Ar 3s inner-valence level as a function of photon energy for two average cluster sizes. Overall, the angular distributions of inner-shell photoelectrons from the cluster and the free atom are found to be very similar, except for the first 10-15 eV above the respective photoionization thresholds, where the angular anisotropy of the atomic photoelectrons is high, while our measurements demonstrate considerably less anisotropy in the cluster photoelectron emission. The angular distribution of Ar 3s inner-valence photoelectrons from the cluster is substantially less anisotropic than for the atomic photoelectrons throughout the covered photon energy range, but the difference decreases for increasing photon energy.
C1 [Zhang, H.; Rolles, D.; Pesic, Z. D.; Berrah, N.] Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA.
[Rolles, D.] Ctr Free Elect Laser Sci, Max Planck Adv Study Grp, D-22761 Hamburg, Germany.
[Bozek, J. D.] Stanford Linear Accelerator Ctr, Linac Coherent Light Source, Menlo Pk, CA 94025 USA.
[Rolles, D.; Pesic, Z. D.; Bozek, J. D.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Zhang, H (reprint author), Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA.
EM Daniel.Rolles@asg.mpg.de
RI Bozek, John/E-4689-2010; Bozek, John/E-9260-2010
OI Bozek, John/0000-0001-7486-7238
FU U. S. Department of Energy
FX This work was supported by the U. S. Department of Energy, Office of
Science, Office of Basic Energy Sciences, Chemical Sciences, Geosciences
and Biosciences Division. D. R. is grateful to the Alexander von
Humboldt Foundation for support through the Feodor Lynen program. We
thank the staff of the ALS, in particular B. S. Rude, G. D. Ackerman,
and A. L. D. Kilcoyne, as well as S. Das and A. A. Wills, for their
assistance during the experiments.
NR 47
TC 15
Z9 15
U1 0
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 DEC
PY 2008
VL 78
IS 6
AR 063201
DI 10.1103/PhysRevA.78.063201
PG 7
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 391OV
UT WOS:000262243500002
ER
PT J
AU Abanov, A
Chubukov, AV
Norman, MR
AF Abanov, Ar.
Chubukov, A. V.
Norman, M. R.
TI Gap anisotropy and universal pairing scale in a spin-fluctuation model
of cuprate superconductors
SO PHYSICAL REVIEW B
LA English
DT Article
DE d-wave superconductivity; exchange interactions (electron); Fermi
surface; fluctuations in superconductors; high-temperature
superconductors; spin fluctuations
ID 2-DIMENSIONAL HUBBARD-MODEL; PHASE FLUCTUATIONS; FERMI-LIQUID; T-C
AB We consider the evolution of d(x)(2)-y(2) pairing, mediated by nearly critical spin fluctuations, with the coupling strength. We show that the onset temperature for pairing, T(*), smoothly evolves between weak and strong couplings passing through a broad maximum at intermediate coupling. At strong coupling, T(*) is of order of the magnetic exchange energy J. We argue that for all couplings, pairing is confined to the vicinity of the Fermi surface. We also find that thermal spin fluctuations only modestly reduce T(*), even at criticality, but they substantially smooth the gap anisotropy. The latter evolves with coupling being the largest at weak coupling.
C1 [Abanov, Ar.] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA.
[Chubukov, A. V.] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
[Norman, M. R.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Abanov, A (reprint author), Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA.
RI Norman, Michael/C-3644-2013
FU Welch Foundation; NSF [DMR 0604406]; Office of Science; U. S. DOE
[DE-AC02-06CH11357]
FX We acknowledge helpful discussions with M. Eschrig, I. Eremin, A. J.
Millis, A.-M. Tremblay, and I. Vekhter, support from the Welch
Foundation(Ar. A.), NSF under Grant No. DMR 0604406 (A. V. C.), and the
Office of Science, U. S. DOE under Contract No. DE-AC02-06CH11357 (M. R.
N.).
NR 34
TC 29
Z9 29
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 DEC
PY 2008
VL 78
IS 22
AR 220507
DI 10.1103/PhysRevB.78.220507
PG 4
WC Physics, Condensed Matter
SC Physics
GA 391PM
UT WOS:000262245200013
ER
PT J
AU Altarawneh, MM
Collar, K
Mielke, CH
Ni, N
Bud'ko, SL
Canfield, PC
AF Altarawneh, M. M.
Collar, K.
Mielke, C. H.
Ni, N.
Bud'ko, S. L.
Canfield, P. C.
TI Determination of anisotropic H-c2 up to 60 T in Ba0.55K0.45Fe2As2 single
crystals
SO PHYSICAL REVIEW B
LA English
DT Article
DE barium compounds; iron compounds; penetration depth (superconductivity);
phase diagrams; potassium compounds; superconducting critical field;
type II superconductors
ID SUPERCONDUCTOR
AB The radio frequency penetration depth was measured in the superconductor (Ba0.55K0.45)Fe2As2 under pulsed magnetic fields extending to 60 T and down to 14 K. Using these data we are able to infer a H-c2(T), H-T phase diagram, for applied fields parallel and perpendicular to the crystallographic c axis. The upper critical-field curvature is different for the respective orientations, but they each remains positive down to 14 K. The upper critical-field anisotropy is moderate, approximate to 3.5 close to T-c, and drops with the decrease in temperature, reaching approximate to 1.2 at 14 K. These data and analysis indicate that (i) (Ba0.55K0.45)Fe2As2 anisotropy diminishes with temperature and has an unusual temperature dependence and (ii) H-c2(T=0) for this compound may easily approach fields of 75 T.
C1 [Altarawneh, M. M.; Collar, K.; Mielke, C. H.] Los Alamos Natl Lab, MPA NHMFL, Los Alamos, NM 87545 USA.
[Ni, N.; Bud'ko, S. L.; Canfield, P. C.] Iowa State Univ, Dept Phys & Astron, Ames Lab, US DOE, Ames, IA 50011 USA.
RP Altarawneh, MM (reprint author), Los Alamos Natl Lab, MPA NHMFL, POB 1663, Los Alamos, NM 87545 USA.
RI Canfield, Paul/H-2698-2014
FU U. S. Department of Energy; Basic Energy Sciences [DE-AC02-07CH11358];
NSF [DMR 0602859]; James Brooks of Florida State University; NNSA/DOE
research [DE-FG52-06NA26193]; NSF Division of Materials Research
[DMR-0654118]; Los Alamos National Laboratory [LDRD-DR20070013]
FX We would like to thank James Brooks for valuable scientific discussion.
Work at the Ames Laboratory was supported by the U. S. Department of
Energy, Basic Energy Sciences under Contract No. DE-AC02-07CH11358. M.
M. A was supported in part by NSF under Contract No. DMR 0602859 through
the research grant of James Brooks of Florida State University. K. C.
was supported in part by the NNSA/DOE research under Grant No.
DE-FG52-06NA26193 of Stan Tozer of Florida State University. Work at
National High Magnetic Field Laboratory-Pulsed Field Facility, Los
Alamos National Laboratory was supported by NSF Division of Materials
Research through Contract No. DMR-0654118, the U. S. Department of
Energy, and the State of Florida. Advances in contactless penetration
depth technology are credited to Los Alamos National Laboratory
(Contract No. LDRD-DR20070013). Los Alamos National Laboratory is
operated by LANS LLC.
NR 10
TC 116
Z9 117
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 DEC
PY 2008
VL 78
IS 22
AR 220505
DI 10.1103/PhysRevB.78.220505
PG 3
WC Physics, Condensed Matter
SC Physics
GA 391PM
UT WOS:000262245200011
ER
PT J
AU Baek, SH
Klimczuk, T
Ronning, F
Bauer, ED
Thompson, JD
Curro, NJ
AF Baek, S. -H.
Klimczuk, T.
Ronning, F.
Bauer, E. D.
Thompson, J. D.
Curro, N. J.
TI Microscopic As-75 NMR study of the effect of impurities on the
first-order spin-density-wave transition in BaFe2As2
SO PHYSICAL REVIEW B
LA English
DT Article
DE arsenic alloys; barium alloys; iron alloys; magnetic transitions;
nuclear magnetic resonance; nuclear spin-lattice relaxation; spin
density waves; spin fluctuations; superconducting transition temperature
ID LAYERED QUATERNARY COMPOUND; 43 K; SUPERCONDUCTIVITY
AB We report an As-75 NMR study of BaFe2As2 in both single crystals and polycrystal forms. We find that Sn impurities in the single crystal dramatically alter the low energy spin fluctuations and suppress the ordering temperature from 138 to 85 K. In contrast to Sn-free samples, we find that the temperature dependence of the As-75 NMR spectra and spin-lattice relaxation rates reveal a second-order phase transition to a state of incommensurate magnetic order.
C1 [Baek, S. -H.; Klimczuk, T.; Ronning, F.; Bauer, E. D.; Thompson, J. D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Klimczuk, T.] Gdansk Univ Technol, Fac Appl Phys & Math, PL-80952 Gdansk, Poland.
[Curro, N. J.] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
RP Baek, SH (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM sbaek@lanl.gov
RI Bauer, Eric/D-7212-2011; Curro, Nicholas/D-3413-2009; Klimczuk,
Tomasz/M-1716-2013; Baek, Seung-Ho/F-4733-2011
OI Curro, Nicholas/0000-0001-7829-0237; Klimczuk,
Tomasz/0000-0003-2602-5049; Baek, Seung-Ho/0000-0002-0059-8255
NR 34
TC 30
Z9 30
U1 2
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 DEC
PY 2008
VL 78
IS 21
AR 212509
DI 10.1103/PhysRevB.78.212509
PG 4
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400023
ER
PT J
AU Belashchenko, KD
Antropov, VP
AF Belashchenko, K. D.
Antropov, V. P.
TI Role of covalent Fe-As bonding in the magnetic moment formation and
exchange mechanisms in iron-pnictide superconductors
SO PHYSICAL REVIEW B
LA English
DT Article
DE antiferromagnetic materials; band structure; bonds (chemical);
high-temperature superconductors; iron compounds; lithium compounds;
local moments; magnetic anisotropy; superexchange interactions
ID 1ST-PRINCIPLES; ADSORPTION; SURFACE
AB The electronic origin of the huge magnetostructural effect in layered Fe-As compounds is elucidated using LiFeAs as a prototype. The crucial feature of these materials is the strong covalent bonding between Fe and As, which tends to suppress the exchange splitting. The bonding-antibonding splitting is very sensitive to the distance between Fe and As nuclei. We argue that the fragile interplay between bonding and magnetism is universal for this family of compounds. The exchange interaction is analyzed in real space, along with its correlation with covalency and doping. The range of interaction and itinerancy increase as the Fe-As distance is decreased. Superexchange makes a large antiferromagnetic contribution to the nearest-neighbor coupling, which develops large anisotropy when the local moment is not too small. This anisotropy is very sensitive to doping.
C1 [Belashchenko, K. D.] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA.
[Belashchenko, K. D.] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA.
[Antropov, V. P.] Ames Lab, Ames, IA 50011 USA.
RP Belashchenko, KD (reprint author), Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA.
RI Belashchenko, Kirill/A-9744-2008
OI Belashchenko, Kirill/0000-0002-8518-1490
FU Basic Energy Sciences, Department of Energy [DE-AC02-07CH11358]
FX We thank Mark van Schilfgaarde for the use of his LMTO codes and Igor
Mazin for useful comments. K. D. B. is a Cottrell Scholar of Research
Corporation. Support from the Nebraska Research Initiative is
acknowledged. Work at Ames Laboratory was supported by Basic Energy
Sciences, Department of Energy under Contract No. DE-AC02-07CH11358.
NR 26
TC 25
Z9 25
U1 1
U2 10
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD DEC
PY 2008
VL 78
IS 21
AR 212505
DI 10.1103/PhysRevB.78.212505
PG 4
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400019
ER
PT J
AU Bulaevskii, LN
Koshelev, AE
Tachiki, M
AF Bulaevskii, L. N.
Koshelev, A. E.
Tachiki, M.
TI Shapiro steps and stimulated radiation of electromagnetic waves due to
Josephson oscillations in layered superconductors
SO PHYSICAL REVIEW B
LA English
DT Article
DE electromagnetic waves; high-temperature superconductors; Josephson
effect
ID EFFECT VOLTAGE STANDARD; SINGLE-CRYSTALS; JUNCTIONS;
BI2SR2CACU2O8+DELTA; FLOW
AB Single crystals of layered high-temperature superconductors intrinsically behave as stacks of Josephson junctions. We analyze response of current-biased stack of intrinsic junctions to irradiation by the external electromagnetic (em) wave. In addition to well-known Shapiro steps in the current-voltage characteristics, irradiation promotes stimulated radiation which adds with spontaneous Josephson radiation from the crystal. Such enhancement of radiation from current-biased crystal may be used for amplification of em waves. Irradiation also facilitates synchronization of Josephson oscillations in all intrinsic Josephson junctions of a single crystal as well as oscillations in intrinsic junctions of different crystals.
C1 [Bulaevskii, L. N.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Koshelev, A. E.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Tachiki, M.] Univ Tokyo, Grad Sch Frontier Sci, Kashiwanoha 2778568, Japan.
RP Bulaevskii, LN (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RI Koshelev, Alexei/K-3971-2013
OI Koshelev, Alexei/0000-0002-1167-5906
FU U. S. DOE [W-7405-Eng-36, DE-AC0206CH11357]
FX The authors thank I. Martin for useful discussions. The research was
supported by the U. S. DOE under the Contracts No. W-7405-Eng-36 (LANL)
and No. DE-AC0206CH11357 (ANL).
NR 24
TC 5
Z9 5
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 DEC
PY 2008
VL 78
IS 22
AR 224519
DI 10.1103/PhysRevB.78.224519
PG 7
WC Physics, Condensed Matter
SC Physics
GA 391PM
UT WOS:000262245200087
ER
PT J
AU Burns, CA
Mulders, N
Lurio, L
Chan, MHW
Said, A
Kodituwakku, CN
Platzman, PM
AF Burns, C. A.
Mulders, N.
Lurio, L.
Chan, M. H. W.
Said, A.
Kodituwakku, C. N.
Platzman, P. M.
TI X-ray studies of low-temperature solid He-4
SO PHYSICAL REVIEW B
LA English
DT Article
DE annealing; grain boundaries; lattice constants; melting; mosaic
structure; solid helium; X-ray analysis
ID BOSE-EINSTEIN CONDENSATION; CRYSTALS; SUBBOUNDARIES; TOPOGRAPHY; HELIUM
AB Recent measurements have found nonclassical rotational inertia (NCRI) in solid He-4 starting at T similar to 200 mK, leading to speculation that a supersolid state may exist in these materials. Differences in the NCRI fraction due to the growth method and annealing history imply that defects play an important role in the effect. Using x-ray synchrotron radiation, we have studied the nature of the crystals and the properties of the defects in solid He-4 at temperatures down to 50 mK. Measurements of peak intensities and lattice parameters do not show indications of the supersolid transition. Using growth methods similar to those of groups measuring the NCRI, we find that large crystals (dimensions similar to millimeters) form. Scanning with a small (down to 10x10 mu m(2)) beam, we resolve a mosaic structure within these crystals, which is consistent with small-angle grain boundaries. The mosaic shows significant shifts over time even at temperatures far from melting. We discuss the relevance of these defects to the NCRI observations.
C1 [Burns, C. A.; Said, A.; Kodituwakku, C. N.] Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA.
[Mulders, N.] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA.
[Lurio, L.] No Illinois Univ, Dept Phys, De Kalb, IL 60615 USA.
[Chan, M. H. W.] Penn State Univ, Dept Phys, University Pk, PA 16802 USA.
[Said, A.; Kodituwakku, C. N.] Argonne Natl Lab, XOR, Adv Photon Source, Argonne, IL 60439 USA.
[Platzman, P. M.] Bell Labs, Murray Hill, NJ 07974 USA.
RP Burns, CA (reprint author), Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA.
FU DOE [DE-FG01-05ER05-02]; NSF [DMR 020701, DMR 0706339]; Office of
Science, Office of Basic Energy Sciences U.S. Department of Energy
[DE-AC02-06CH113]
FX C. A. B. acknowledges support for this project from DOE under Grant No.
DE-FG01-05ER05-02, and M. H. W. C. acknowledges support from NSF under
Grants No. DMR 020701 and No. DMR 0706339. We thank the staff at Sector
8 of the APS for the assistance with the measurements. Use of the
Advanced Photon Source at Argonne National Laboratory was supported by
the , Office of Science, Office of Basic Energy Sciences U.S. Department
of Energy under Contract No. DE-AC02-06CH113
NR 35
TC 18
Z9 18
U1 0
U2 4
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 DEC
PY 2008
VL 78
IS 22
AR 224305
DI 10.1103/PhysRevB.78.224305
PG 6
WC Physics, Condensed Matter
SC Physics
GA 391PM
UT WOS:000262245200044
ER
PT J
AU Chantis, AN
Smith, DL
AF Chantis, Athanasios N.
Smith, Darryl L.
TI Theory of electrical spin-detection at a ferromagnet/semiconductor
interface
SO PHYSICAL REVIEW B
LA English
DT Article
DE ab initio calculations; ferromagnetic materials; gallium arsenide; III-V
semiconductors; interface magnetism; iron; magnesium compounds; magnetic
tunnelling; semiconductor-metal boundaries; spin polarised transport
ID SEMICONDUCTOR; INJECTION; TRANSPORT; BARRIER
AB We present a theoretical model that describes electrical spin-detection at a ferromagnet/semiconductor interface. We show that the sensitivity of the spin-detector has strong bias dependence which, in the general case, is dramatically different from that of the tunneling current spin polarization. We show that this bias dependence originates from two distinct physical mechanisms: (1) the bias dependence of tunneling current spin polarization, which is of microscopic origin and depends on the specific properties of the interface and (2) the macroscopic electron-spin transport properties in the semiconductor. Numerical results show that the magnitude of the voltage signal can be tuned over a wide range from the second effect which suggests a universal method for enhancing electrical spin-detection sensitivity in ferromagnet/semiconductor tunnel contacts. Using first-principles calculations we examine the particular case of a Fe/GaAs Schottky tunnel barrier and find very good agreement with experiment. We also predict the bias dependence of the voltage signal for a Fe/MgO/GaAs tunnel structure spin-detector.
C1 [Chantis, Athanasios N.; Smith, Darryl L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Chantis, AN (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
OI Chantis, Athanasios/0000-0001-7933-0579
FU DOE Office of Basic Energy Sciences Work [08SCPE973]
FX This work was supported by DOE Office of Basic Energy Sciences Work
Proposal No. 08SCPE973. We thank S. A. Crooker and P. A. Crowell for
many valuable discussions.
NR 21
TC 13
Z9 13
U1 0
U2 7
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD DEC
PY 2008
VL 78
IS 23
AR 235317
DI 10.1103/PhysRevB.78.235317
PG 8
WC Physics, Condensed Matter
SC Physics
GA 391PO
UT WOS:000262245400080
ER
PT J
AU Choi, KY
Wulferding, D
Lemmens, P
Ni, N
Bud'ko, SL
Canfield, PC
AF Choi, K. -Y.
Wulferding, D.
Lemmens, P.
Ni, N.
Bud'ko, S. L.
Canfield, P. C.
TI Lattice and electronic anomalies of CaFe2As2 studied by Raman
spectroscopy
SO PHYSICAL REVIEW B
LA English
DT Article
DE calcium compounds; electronic density of states; iron compounds; light
scattering; phonons; Raman spectra; solid-state phase transformations;
spectral line breadth
ID 43 K; SUPERCONDUCTIVITY; LAO1-XFXFEAS; COMPOUND
AB We report inelastic light-scattering experiments on CaFe2As2 in the temperature range of 4-290 K. In in-plane polarizations two Raman-active phonon modes are observed at 189 and 211 cm(-1), displaying A(1g) and B-1g symmetries, respectively. Upon heating through the tetragonal-to-orthorhombic transition at about T-S=173 K, the B-1g phonon undergoes a discontinuous drop of frequency by 4 cm(-1), whereas the A(1g) phonon shows a suppression of the integrated intensity. Their linewidth increases strongly with increasing temperature and saturates above T-S. This suggests (i) a first-order structural phase transition and (ii) a drastic change in charge distribution within the FeAs plane through T-S.
C1 [Choi, K. -Y.] Chung Ang Univ, Dept Phys, Seoul 156756, South Korea.
[Wulferding, D.; Lemmens, P.] Tech Univ Carolo Wilhelmina Braunschweig, Inst Condensed Matter Phys, D-38106 Braunschweig, Germany.
[Ni, N.; Bud'ko, S. L.; Canfield, P. C.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Ni, N.; Bud'ko, S. L.; Canfield, P. C.] Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA.
RP Choi, KY (reprint author), Chung Ang Univ, Dept Phys, 221 Huksuk Dong, Seoul 156756, South Korea.
RI Canfield, Paul/H-2698-2014; Lemmens, Peter/C-8398-2009;
OI Lemmens, Peter/0000-0002-0894-3412; Wulferding, Dirk/0000-0003-4279-2109
NR 22
TC 39
Z9 39
U1 2
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 DEC
PY 2008
VL 78
IS 21
AR 212503
DI 10.1103/PhysRevB.78.212503
PG 4
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400017
ER
PT J
AU Chuang, FC
Hsu, CH
Wang, CZ
Ho, KM
AF Chuang, Feng-Chuan
Hsu, Chia-Hsiu
Wang, Cai-Zhuang
Ho, Kai-Ming
TI Atomic and electronic structures of Ag/Si(111)-c(12x2) surface: A
first-principles study
SO PHYSICAL REVIEW B
LA English
DT Article
DE ab initio calculations; electronic structure; elemental semiconductors;
molecular dynamics method; photoelectron spectra; scanning tunnelling
microscopy; silicon; silver; surface reconstruction; surface states;
tight-binding calculations; total energy
ID SCANNING-TUNNELING-MICROSCOPY; SI(111); RECONSTRUCTION; AG; ADSORPTION;
3X1; INTERFACE; METALS; SILVER
AB Structural models for the Ag/Si(111)-c(12x2) phase were identified from a systematic search using tight-binding molecular dynamics and first-principles total-energy calculations. Our calculations showed that the low-energy c(12x2) and 6x1 structures can be derived from the well-known honeycomb chain-channel 3x1 model. Two c(12x2) models are found to have lower surface energies than both the 3x1 and 6x1 models, which is consistent with the experimental observation. A distinct feature of the c(12x2) structure is the dimer formation induced by lateral displacements of Ag atoms within the same row in the 6x1 phase. Different packing patterns of the Ag dimers with the same surface area can lead to either 6x2 or c(12x2) phase with very similar energies. Simulated scanning tunneling microscope images from our c(12x2) structure are in excellent agreement with the experimental measurement. Moreover, the lowest-energy c(12x2) structure identified from our calculations also reproduces the key features in the angle-resolved photoemission measurement.
C1 [Chuang, Feng-Chuan; Hsu, Chia-Hsiu] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 804, Taiwan.
[Wang, Cai-Zhuang; Ho, Kai-Ming] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Wang, Cai-Zhuang; Ho, Kai-Ming] US DOE, Ames Lab, Ames, IA 50011 USA.
RP Chuang, FC (reprint author), Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 804, Taiwan.
EM fchuang@mail.nsysu.edu.tw
RI Chuang, FengChuan/H-7166-2013
OI Chuang, FengChuan/0000-0003-0351-4253
FU NCST; National Science Council of Taiwan [NSC95-2112-M110-022-MY3];
National Energy Research Supercomputing Center (NERSC) in Berkeley; U.
S. Department of Energy by Iowa State University [DE-AC0207CH11358]
FX F. C. C. acknowledges support from NCST and National Science Council of
Taiwan under Grant No. NSC95-2112-M110-022-MY3. We are grateful to the
National Center for High-performance Computing for computer time and
facilities. C. Z. W. and K. M. H. acknowledge support from the Director
of Energy Research, Office of Basic Energy Sciences, which includes a
grant of computer time at the National Energy Research Supercomputing
Center (NERSC) in Berkeley. Ames Laboratory was operated for the U. S.
Department of Energy by Iowa State University under Contract No.
DE-AC0207CH11358.
NR 36
TC 6
Z9 6
U1 0
U2 6
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 DEC
PY 2008
VL 78
IS 24
AR 245418
DI 10.1103/PhysRevB.78.245418
PG 6
WC Physics, Condensed Matter
SC Physics
GA 391PY
UT WOS:000262246400085
ER
PT J
AU Culcer, D
Winkler, R
AF Culcer, Dimitrie
Winkler, R.
TI Weak momentum scattering and the conductivity of graphene
SO PHYSICAL REVIEW B
LA English
DT Article
DE carbon; carrier density; electrical conductivity; Liouville equation;
semiconductor materials; spin Hall effect; spin polarised transport;
spin-orbit interactions
ID TRANSPORT-PROPERTIES; QUANTUM
AB Electrical transport in graphene offers a fascinating parallel to spin transport in semiconductors including the spin-Hall effect. In the weak momentum scattering regime the steady-state density matrix contains two contributions: one is linear in the carrier number density n and characteristic scattering time tau, and the other is independent of either. In this paper we take the Liouville equation as our starting point and demonstrate that these two contributions can be identified with pseudospin conservation and nonconservation, respectively, and are connected in a nontrivial manner by scattering processes. The scattering term has a distinct form, which is peculiar to graphene and has important consequences in transport. The contribution linear in tau is analogous to the part of the spin-density matrix which yields a steady-state spin density, while the contribution independent of tau is analogous to the part of the spin-density matrix which yields a steady-state spin current. Unlike in systems with spin-orbit interactions, the n- and tau-independent part of the conductivity is reinforced in the weak momentum scattering regime by scattering between the conserved and nonconserved pseudospin distributions.
C1 [Culcer, Dimitrie] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
No Illinois Univ, De Kalb, IL 60115 USA.
RP Culcer, D (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
FU Office of Science, Office of Basic Energy Sciences, U. S. Department of
Energy [DE-AC02-06CH11357]
FX We are very grateful to Allan MacDonald, Qian Niu, Branislav Nikolic,
Horst Stormer, Philip Kim, Shaffique Adam, Bjorn Trauzettel, Maxim
Trushin, Di Xiao, Wang Yao, Wang Kong Tse, Handong Chen, and Sun Wukong
for stimulating discussions. The research at Argonne National Laboratory
was supported by the Office of Science, Office of Basic Energy Sciences,
U. S. Department of Energy under Contract No. DE-AC02-06CH11357.
NR 75
TC 11
Z9 12
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 DEC
PY 2008
VL 78
IS 23
AR 235417
DI 10.1103/PhysRevB.78.235417
PG 10
WC Physics, Condensed Matter
SC Physics
GA 391PO
UT WOS:000262245400103
ER
PT J
AU Da Silva, JLF
Walsh, A
Lee, HL
AF Da Silva, Juarez L. F.
Walsh, Aron
Lee, Hosun
TI Insights into the structure of the stable and metastable
(GeTe)(m)(Sb2Te3)(n) compounds
SO PHYSICAL REVIEW B
LA English
DT Article
DE ab initio calculations; antimony compounds; germanium compounds; lattice
constants; metastable states; phase change materials; stacking faults;
superlattices; vacancies (crystal)
ID PHASE-CHANGE MATERIALS; AUGMENTED-WAVE METHOD; ELECTRON-DIFFRACTION;
SB-TE; HOMOLOGOUS SERIES; LOCAL-STRUCTURE; GETE; GE2SB2TE5; MEMORY;
FILMS
AB Using first-principles calculations, we identify the mechanisms that lead to the lowest energy structures for the stable and metastable (GeTe)(m)(Sb2Te3)(n) (GST) compounds, namely, strain energy release by the formation of superlattice structures along of the hexagonal [0001] direction and by maximizing the number of Te atoms surrounded by three Ge and three Sb atoms (3Ge-Te-3Sb rule) and Peierls-type bond dimerization. The intrinsic vacancies form ordered planes perpendicular to the stacking direction in both phases, which separate the GST building blocks. The 3Ge-Te-3Sb rule leads to the intermixing of Ge and Sb atoms in the (0001) planes for Ge3Sb2Te6 and Ge2Sb2Te5, while only single atomic species in the (0001) planes satisfy this rule for the GeSb2Te4 and GeSb4Te7 compositions. Furthermore, we explain the volume expansion of the metastable phase with respect to the stable phase as a consequence of the different stacking sequence of the Te atoms in the stable and metastable phases, which leads to a smaller Coulomb repulsion in the stable phase. The calculated equilibrium lattice parameters are in excellent agreement with experimental results and differ by less than 1% from the lattice parameters derived from a combination of the GeTe and Sb2Te3 parent compounds.
C1 [Da Silva, Juarez L. F.; Walsh, Aron] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Lee, Hosun] Kyung Hee Univ, Dept Appl Phys, Suwon 446701, South Korea.
RP Da Silva, JLF (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
RI Walsh, Aron/A-7843-2008; Da Silva, Juarez L. F./D-1779-2011
OI Walsh, Aron/0000-0001-5460-7033; Da Silva, Juarez L.
F./0000-0003-0645-8760
NR 53
TC 72
Z9 72
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 DEC
PY 2008
VL 78
IS 22
AR 224111
DI 10.1103/PhysRevB.78.224111
PG 10
WC Physics, Condensed Matter
SC Physics
GA 391PM
UT WOS:000262245200027
ER
PT J
AU Das, N
Tsui, S
Xue, YY
Wang, YQ
Chu, CW
AF Das, N.
Tsui, S.
Xue, Y. Y.
Wang, Y. Q.
Chu, C. W.
TI Electric-field-induced submicrosecond resistive switching
SO PHYSICAL REVIEW B
LA English
DT Article
DE calcium compounds; electromigration; electron traps; hole traps;
metal-insulator boundaries; point defects; praseodymium compounds;
silver; switching
ID RESISTANCE; SOLIDS
AB Electric-field-induced resistive switching in metal-oxide interfaces has attracted extensive recent interest. While many agree that lattice defects play a key role, details of the physical processes are far from clear. There is debate, for example, regarding whether the electromigration of pre-existing point defects or the field-created larger lattice defects dominates the switch. We investigate several Ag-Pr(0.7)Ca(0.3)MnO(3) samples exhibiting either submicrosecond fast switching or slow quasistatic dc switching. It is found that the carrier trapping potentials are very different for the pre-existing point defects associated with doping (and/or electromigration) and for the defects responsible for the submicrosecond fast switching. Creation/removal of the defects with more severe lattice distortions and spatial spreading (trapping potential >= 0.35 eV), therefore, should be the dominating mechanism during submicrosecond switching. On the other hand, the shallow defects (trapping potential < 0.2 eV) associated with doping/annealing are most likely responsible for the resistance hysteresis (slow switch) during quasistatic voltage sweep.
C1 [Das, N.; Tsui, S.; Xue, Y. Y.; Wang, Y. Q.; Chu, C. W.] Univ Houston, Dept Phys, Houston, TX 77204 USA.
[Das, N.; Tsui, S.; Xue, Y. Y.; Wang, Y. Q.; Chu, C. W.] Univ Houston, TCSUH, Houston, TX 77204 USA.
[Chu, C. W.] Hong Kong Univ Sci & Technol, Hong Kong, Hong Kong, Peoples R China.
[Chu, C. W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Das, N (reprint author), Univ Houston, Dept Phys, Houston, TX 77204 USA.
NR 20
TC 38
Z9 38
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 DEC
PY 2008
VL 78
IS 23
AR 235418
DI 10.1103/PhysRevB.78.235418
PG 5
WC Physics, Condensed Matter
SC Physics
GA 391PO
UT WOS:000262245400104
ER
PT J
AU Eliseev, EA
Morozovska, AN
Svechnikov, GS
Rumyantsev, EL
Shishkin, EI
Shur, VY
Kalinin, SV
AF Eliseev, E. A.
Morozovska, A. N.
Svechnikov, G. S.
Rumyantsev, E. L.
Shishkin, E. I.
Shur, V. Y.
Kalinin, S. V.
TI Screening and retardation effects on 180 degrees-domain wall motion in
ferroelectrics: Wall velocity and nonlinear dynamics due to
polarization-screening charge interactions
SO PHYSICAL REVIEW B
LA English
DT Article
DE dielectric depolarisation; dielectric polarisation; dielectric
relaxation; electric domain walls; ferroelectric capacitors
ID HIGHLY-NONEQUILIBRIUM CONDITIONS; PBZRXTI1-XO3 THIN-FILMS; DOMAIN-WALLS;
LITHIUM-NIOBATE; PHASE-TRANSITION; BARIUM-TITANATE; SWITCHING TIME;
SURFACE; BATIO3; DEPENDENCE
AB The effect of the domain wall intrinsic width, relaxation time of the screening charges, and the dead layer thickness on the velocity of the planar 180 degrees-domain wall moving under homogeneous external electric field in ferroelectric capacitor is analyzed. The limiting cases of domain wall motion, including (i) the motion induced by the external and local internal field originated at the wall-surface junction for nonzero dead layer thickness and (ii) the motion induced by the effective electric field averaged over the domain wall surface, are considered. We demonstrate the crossover between two screening regimes: the first one corresponds to the low domain wall velocity, when the wall drags the sluggish screening charges, while the second regime appears for high domain wall velocity, when the delay of sluggish screening charges are essential and the wall depolarization field is screened by the instant free charges located at the electrode. The integral and approximate analytical expressions for electric field and algebraic equation for the domain wall velocity are derived. It is shown that in the local-field limit the motion can be unstable, since the internal field at the wall-surface junction decreases for larger domain wall velocities, making possible self-acceleration of the wall near the top surface. The instability may lead to the domain wall-surface bending and actual broadening in thick samples, as well as formation of periodic domain structures in the direction of wall motion. The motion in the limit of the averaged effective field is always stable.
C1 [Morozovska, A. N.; Svechnikov, G. S.] Natl Acad Sci Ukraine, Inst Semicond Phys, UA-03028 Kiev, Ukraine.
[Eliseev, E. A.] Natl Acad Sci Ukraine, Inst Problems Mat Sci, UA-03142 Kiev, Ukraine.
[Rumyantsev, E. L.; Shishkin, E. I.; Shur, V. Y.] Ural State Univ, Inst Phys & Appl Math, Ekaterinburg 620083, Russia.
[Kalinin, S. V.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
[Kalinin, S. V.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Morozovska, AN (reprint author), Natl Acad Sci Ukraine, Inst Semicond Phys, 41 Pr Nauki, UA-03028 Kiev, Ukraine.
EM morozo@i.com.ua; sergei2@orn1.gov
RI Kalinin, Sergei/I-9096-2012
OI Kalinin, Sergei/0000-0001-5354-6152
FU National Academy of Science of Ukraine; Russian Academy of Science [NASU
N 17-Ukr_a]; RFBR [N 08-02-90434]; Division of Scientific User
Facilities; DOE BES
FX E. E. A., A. N. M., G. S. S., E. L. R., E. I. S., and V. Y. S.
gratefully acknowledge financial support from National Academy of
Science of Ukraine and Russian Academy of Science, joint
Russian-Ukrainian grant under Grant No. NASU N 17-Ukr_a (RFBR under
Grant No. N 08-02-90434). The research is supported in part (S.V.K.) by
the Division of Scientific User Facilities, DOE BES.
NR 42
TC 19
Z9 19
U1 0
U2 29
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 DEC
PY 2008
VL 78
IS 24
AR 245409
DI 10.1103/PhysRevB.78.245409
PG 10
WC Physics, Condensed Matter
SC Physics
GA 391PY
UT WOS:000262246400076
ER
PT J
AU Fidkowski, L
Refael, G
Bonesteel, NE
Moore, JE
AF Fidkowski, L.
Refael, G.
Bonesteel, N. E.
Moore, J. E.
TI c-theorem violation for effective central charge of infinite-randomness
fixed points
SO PHYSICAL REVIEW B
LA English
DT Article
DE antiferromagnetism; anyons; entropy; ferromagnetism; Fibonacci
sequences; ground states; Heisenberg model; quantum computing; quantum
entanglement; renormalisation
ID ANTI-FERROMAGNETIC CHAIN; FIELD-THEORY; STATES
AB Topological insulators supporting non-Abelian anyonic excitations are in the center of attention as candidates for topological quantum computation. In this paper, we analyze the ground-state properties of disordered non-Abelian anyonic chains. The resemblance of fusion rules of non-Abelian anyons and real-space decimation strongly suggests that disordered chains of such anyons generically exhibit infinite-randomness phases. Concentrating on the disordered golden chain model with nearest-neighbor coupling, we show that Fibonacci anyons with the fusion rule tau circle times tau=1 circle plus tau exhibit two infinite-randomness phases: a random-singlet phase when all bonds prefer the trivial fusion channel and a mixed phase which occurs whenever a finite density of bonds prefers the tau fusion channel. Real-space renormalization-group (RG) analysis shows that the random-singlet fixed point is unstable to the mixed fixed point. By analyzing the entanglement entropy of the mixed phase, we find its effective central charge and find that it increases along the RG flow from the random-singlet point, thus ruling out a c theorem for the effective central charge.
C1 [Fidkowski, L.; Refael, G.] CALTECH, Inst Quantum Informat, Dept Phys, Pasadena, CA 91125 USA.
[Bonesteel, N. E.] Florida State Univ, Dept Phys, Tallahassee, FL 32310 USA.
[Bonesteel, N. E.] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
[Moore, J. E.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Moore, J. E.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Fidkowski, L (reprint author), CALTECH, Inst Quantum Informat, Dept Phys, MC 114-36, Pasadena, CA 91125 USA.
RI Moore, Joel/O-4959-2016
OI Moore, Joel/0000-0002-4294-5761
FU NSF [PHY-0456720, DMR-0238760]; U. S. DOE [DE-FG02-97ER45639]
FX We are indebted to A. Kitaev, J. Preskill, S. Trebst, and P. Bonderson
for illuminating discussions. We would like to especially thank K. Yang
for his contributions to this project. G. R. and L. F. acknowledge
support from NSF under Grant No. PHY-0456720. N. E. B. acknowledges
support from U. S. DOE under Grant No. DE-FG02-97ER45639. J. M.
acknowledges support from NSF under Grant No. DMR-0238760. We would also
like to acknowledge the KITP and UCSB for their hospitality.
NR 29
TC 25
Z9 25
U1 0
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 DEC
PY 2008
VL 78
IS 22
AR 224204
DI 10.1103/PhysRevB.78.224204
PG 15
WC Physics, Condensed Matter
SC Physics
GA 391PM
UT WOS:000262245200034
ER
PT J
AU Garcia, DR
Jozwiak, C
Hwang, CG
Fedorov, A
Hanrahan, SM
Wilson, SD
Rotundu, CR
Freelon, BK
Birgeneau, RJ
Bourret-Courchesne, E
Lanzara, A
AF Garcia, D. R.
Jozwiak, C.
Hwang, C. G.
Fedorov, A.
Hanrahan, S. M.
Wilson, S. D.
Rotundu, C. R.
Freelon, B. K.
Birgeneau, R. J.
Bourret-Courchesne, E.
Lanzara, A.
TI Core-level and valence-band study using angle-integrated photoemission
on LaFeAsO0.9F0.1
SO PHYSICAL REVIEW B
LA English
DT Article
DE electron correlations; electronic density of states; high-temperature
superconductors; iron compounds; lanthanum compounds; photoelectron
spectra; solid-state phase transformations; superconducting transitions;
valence bands
ID ELECTRONIC-STRUCTURE; SUPERCONDUCTORS; SPECTROSCOPY
AB Using angle-integrated photoemission spectroscopy we have probed the novel LaFeAsO0.9F0.1 superconductor over a wide range of photon energies and temperatures. We have provided a full characterization of the orbital character of the valence-band (VB) density of states (DOS) and of the magnitude of the d-p hybridization energy. Finally, we have identified two characteristic temperatures: 90 K where a pseudogap-like feature appears to close and 120 K where a sudden change in the DOS near E-F occurs. We associate these phenomena with the spin density wave magnetic ordering and the structural transition seen in the parent compound, respectively. These results suggest the important role of electron correlation, spin physics, and structural distortion in the physics of Fe-based superconductors.
C1 [Garcia, D. R.; Jozwiak, C.; Birgeneau, R. J.; Lanzara, A.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Garcia, D. R.; Hwang, C. G.; Wilson, S. D.; Rotundu, C. R.; Freelon, B. K.; Birgeneau, R. J.; Bourret-Courchesne, E.; Lanzara, A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA.
[Fedorov, A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Hanrahan, S. M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
RP Lanzara, A (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM alanzara@lbl.gov
OI Rotundu, Costel/0000-0002-1571-8352
FU Director, Office of Science, Office of Basic Energy Sciences, Materials
Sciences and Engineering Division of the U. S. DOE [DE-AC02-05CH11231];
National Science Foundation [DMR03-49361]; U. S. Department of Energy
FX We would like to thank D.-H. Lee, A. Vishwanath, J. Wu, P. Phillips, A.
Castro-Neto, S.Y. Zhou, D. Siegel, and O. Fakhouri for helpful
discussions. We would also like to thank G. Sawatzky for a critical
reading of the manuscript. The ARPES measurements and data analysis were
supported by the Director, Office of Science, Office of Basic Energy
Sciences, Materials Sciences and Engineering Division of the U. S. DOE
under Contract No. DE-AC02-05CH11231 and through the National Science
Foundation through Grant No. DMR03-49361. Additionally, portions of this
research were carried out at the Stanford Synchrotron Radiation
Laboratory, a national user facility operated by Stanford University on
behalf of the Office of Basic Energy Sciences, U. S. Department of
Energy.
NR 35
TC 10
Z9 10
U1 0
U2 2
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 DEC
PY 2008
VL 78
IS 24
AR 245119
DI 10.1103/PhysRevB.78.245119
PG 6
WC Physics, Condensed Matter
SC Physics
GA 391PY
UT WOS:000262246400031
ER
PT J
AU Gibson, JM
Treacy, MMJ
AF Gibson, J. M.
Treacy, M. M. J.
TI Beam transit effects in single molecule coherent diffraction
SO PHYSICAL REVIEW B
LA English
DT Article
DE diffraction; fullerenes; molecular beams; molecular biophysics; proteins
ID INITIO STRUCTURE SOLUTION; POWDER DIFFRACTION; RAY; MICROSCOPY; IMAGES
AB We explore how phase and amplitude gradients, which are almost inevitable in a coherent illumination probe, affect the atomic reconstruction of an isolated molecule based on diffraction intensities. By modeling the probe as a defocused Gaussian source, we show that structural distortion can be introduced in the reconstructed object if plane-wave illumination is assumed in the diffraction phase-retrieval algorithm. For the plane-wave approximation, we conclude that the standard deviation sigma(d) describing the source width should be such that sigma(d)similar to 10R(c), where R(c) is the nominal radius of the molecule. In a pulsed source, where diffraction data are obtained when the moving molecule is at an instantaneous location within the illumination window, the effects of wave front curvature can be reduced by defocusing the illumination. This improvement comes at the expense of a weaker diffraction signal. For the three-dimensional reconstruction of a molecule, diffraction patterns from many different orientations of identical molecules are required. Since phase-retrieval methods are inherently solving for the probe plus the molecule, irreproducibility of wave front curvature or molecule location within the probe will introduce additional degrees of freedom to the structure solution problem.
C1 [Gibson, J. M.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Treacy, M. M. J.] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA.
RP Gibson, JM (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Gibson, Murray/E-5855-2013
OI Gibson, Murray/0000-0002-0807-6224
FU Office of Science; Office of Basic Energy Sciences; U. S. Department of
Energy; Advanced Photon Source [DE-AC02-06CH11357]
FX We are grateful to L. Fan, D. Kumar, and I. McNulty for fruitful
discussions, and we thank the Office of Science, Office of Basic Energy
Sciences, U. S. Department of Energy for support to the Advanced Photon
Source through Contract No. DE-AC02-06CH11357.
NR 25
TC 1
Z9 1
U1 1
U2 4
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 DEC
PY 2008
VL 78
IS 24
AR 245401
DI 10.1103/PhysRevB.78.245401
PG 9
WC Physics, Condensed Matter
SC Physics
GA 391PY
UT WOS:000262246400068
ER
PT J
AU Hawreliak, JA
Kalantar, DH
Stolken, JS
Remington, BA
Lorenzana, HE
Wark, JS
AF Hawreliak, James A.
Kalantar, Daniel H.
Stoelken, James S.
Remington, Bruce A.
Lorenzana, Hector E.
Wark, Justin S.
TI High-pressure nanocrystalline structure of a shock-compressed single
crystal of iron
SO PHYSICAL REVIEW B
LA English
DT Article
DE grain size; high-pressure effects; iron; molecular dynamics method;
nanostructured materials; shock wave effects; X-ray diffraction
ID X-RAY-DIFFRACTION; PROFILE ANALYSIS; LASER; COPPER; TRANSITION;
CONTRAST; LIGHT
AB We discuss the grain-size measurements made during shock compression using in situ x-ray diffraction. Our experiments have shown unambiguously that single-crystal iron shock loaded above 13 GPa along the [100] direction will transform from the ambient alpha phase (bcc) to a highly ordered polycrystalline epsilon phase (hcp). Here, we present a detailed shape analysis of the diffraction peaks using a modified Warren-Averbach method to quantify the microstructure of shock-compressed high-pressure iron. The epsilon phase was determined through this method to have grain sizes between 2 and 15 nm, in reasonable agreement with results from large-scale molecular-dynamics simulations. We conclude that single-crystal iron becomes nanocrystalline in shock transforming from alpha to epsilon phase.
C1 [Hawreliak, James A.; Kalantar, Daniel H.; Stoelken, James S.; Remington, Bruce A.; Lorenzana, Hector E.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Wark, Justin S.] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England.
RP Hawreliak, JA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
FU U. S. Department of Energy [DE-AC52-07NA27344]; LDRD [06-SI-004 at
LLNL]; DOE [DEFG0398DP00212, DEFG0300SF2202]; U. K. EPSRC [GR/R25699/01]
FX The authors thank the staff at the Vulcan Laser Facility at the
Rutherford Appleton Laboratory, the staff at Janus laser at Lawrence
Livermore National Laboratory, and the staff and University of Rochester
Laboratory for Laser Energetics. 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 supported by
the LDRD program under Project No. 06-SI-004 at LLNL. Additional support
was provided by the DOE under Grants No. DEFG0398DP00212 and No.
DEFG0300SF2202 and by the U. K. EPSRC under Grant No. GR/R25699/01.
NR 27
TC 21
Z9 22
U1 0
U2 13
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD DEC
PY 2008
VL 78
IS 22
AR 220101
DI 10.1103/PhysRevB.78.220101
PG 4
WC Physics, Condensed Matter
SC Physics
GA 391PM
UT WOS:000262245200001
ER
PT J
AU Henelius, P
Fishman, RS
AF Henelius, P.
Fishman, R. S.
TI Hybrid quantum-classical Monte Carlo study of a molecule-based magnet
SO PHYSICAL REVIEW B
LA English
DT Article
DE Heisenberg model; iron compounds; magnetic transitions; molecular
magnetism; Monte Carlo methods; quantum theory
ID HONEYCOMB LATTICE; MIXED-VALENCY; FERRIMAGNETIC SYSTEM; M-III; OXALATE;
SPIN-2; FERROMAGNETISM; MAGNETIZATION; CATIONS; MODEL
AB Using a Monte Carlo (MC) method, we study an effective model for the Fe(II)Fe(III) bimetallic oxalates. Within a hybrid quantum-classical MC algorithm, the Heisenberg S=2 and S(')=5/2 spins on the Fe(II) and Fe(III) sites are updated using a quantum MC loop while the Ising-type orbital angular momenta on the Fe(II) sites are updated using a single-spin classical MC flip. The effective field acting on the orbital angular momenta depends on the quantum state of the system. We find that the mean-field phase diagram for the model is surprisingly robust with respect to fluctuations. In particular, the region displaying two compensation points shifts and shrinks but remains finite.
C1 [Henelius, P.] Royal Inst Technol, SE-10691 Stockholm, Sweden.
[Fishman, R. S.] Oak Ridge Natl Lab, Mat Sci & Technol Lab, Oak Ridge, TN 37831 USA.
RP Henelius, P (reprint author), Royal Inst Technol, SE-10691 Stockholm, Sweden.
RI Fishman, Randy/C-8639-2013
FU U. S. Department of Energy [DE-AC05-00OR22725]; Division of Materials
Science and Engineering of the U. S. DOE
FX We would like to acknowledge helpful conversations with Fernando
Reboredo and Anders Sandvik. P. H. acknowledges support by the Swedish
Research Council. We are grateful for the generous time allocation on
the Ferlin cluster managed by the Center for Parallel Computers at KTH.
R. F. acknowledges support by the Laboratory Directed Research and
Development Program of Oak Ridge National Laboratory managed by
UT-Battelle LLC for the U. S. Department of Energy under Contract No.
DE-AC05-00OR22725 and by the Division of Materials Science and
Engineering of the U. S. DOE.
NR 28
TC 10
Z9 10
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 DEC
PY 2008
VL 78
IS 21
AR 214405
DI 10.1103/PhysRevB.78.214405
PG 7
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400050
ER
PT J
AU Hong, T
Garlea, VO
Zheludev, A
Fernandez-Baca, JA
Manaka, H
Chang, S
Leao, JB
Poulton, SJ
AF Hong, Tao
Garlea, V. O.
Zheludev, A.
Fernandez-Baca, J. A.
Manaka, H.
Chang, S.
Leao, J. B.
Poulton, S. J.
TI Effect of pressure on the quantum spin ladder material IPA-CuCl3
SO PHYSICAL REVIEW B
LA English
DT Article
DE high-pressure solid-state phase transformations; magnetic fluids;
magnetic susceptibility; magnetic transitions; neutron diffraction
ID BOSE-EINSTEIN CONDENSATION; NEUTRON-SCATTERING; HEISENBERG-CHAINS;
TLCUCL3; (CH3)(2)CHNH3CUCL3; GAP
AB Inelastic-neutron-scattering and bulk magnetic-susceptibility studies of the quantum S=1/2 spin ladder system (CH3)(2)CHNH3CuCl3 are performed under hydrostatic pressure. The pressure dependence of the spin gap Delta is determined. At P=1500 MPa it is reduced to Delta=0.79 meV from Delta=1.17 meV at ambient pressure. The results allow us to predict a soft-mode quantum phase transition in this system at P-c similar to 4 GPa. The measurements are complicated by the proximity of a structural phase transition that leads to a deterioration of the sample.
C1 [Hong, Tao; Garlea, V. O.; Zheludev, A.; Fernandez-Baca, J. A.] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
[Manaka, H.] Kagoshima Univ, Grad Sch Sci & Engn, Kagoshima 8900065, Japan.
[Chang, S.; Leao, J. B.; Poulton, S. J.] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Poulton, S. J.] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA.
RP Hong, T (reprint author), Oak Ridge Natl Lab, Neutron Scattering Sci Div, POB 2008, Oak Ridge, TN 37831 USA.
RI Hong, Tao/F-8166-2010; Fernandez-Baca, Jaime/C-3984-2014; Garlea,
Vasile/A-4994-2016
OI Hong, Tao/0000-0002-0161-8588; Fernandez-Baca,
Jaime/0000-0001-9080-5096; Garlea, Vasile/0000-0002-5322-7271
FU Division of Scientific User Facilities; Office of Basic Energy Sciences;
U. S. Department of Energy [DE-AC05-00OR22725]; National Science
Foundation [DMR-9986442, DMR-0086210, DMR-0454672]
FX Research at ORNL was funded the Division of Scientific User Facilities,
Office of Basic Energy Sciences, U. S. Department of Energy, under
Contract No. DE-AC05-00OR22725 with UT-Battelle, LLC. The work at NIST
was supported by the National Science Foundation under Agreements No.
DMR-9986442, No. DMR-0086210, and No. DMR-0454672.
NR 23
TC 9
Z9 9
U1 2
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 DEC
PY 2008
VL 78
IS 22
AR 224409
DI 10.1103/PhysRevB.78.224409
PG 4
WC Physics, Condensed Matter
SC Physics
GA 391PM
UT WOS:000262245200056
ER
PT J
AU Hucker, M
Gu, GD
Tranquada, JM
AF Huecker, M.
Gu, G. D.
Tranquada, J. M.
TI Spin susceptibility of underdoped cuprate superconductors: Insights from
a stripe-ordered crystal
SO PHYSICAL REVIEW B
LA English
DT Article
DE barium compounds; high-temperature superconductors; lanthanum compounds;
magnetic susceptibility; paramagnetism
ID HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNETIC-SUSCEPTIBILITY;
NEUTRON-SCATTERING; FERMI-LIQUID; NORMAL-STATE; PHASE-SEPARATION;
LA2-XSRXCUO4; NMR; FLUCTUATIONS; DYNAMICS
AB We report a detailed study of the temperature and magnetic-field dependence of the spin susceptibility for a single crystal of La(1.875)Ba(0.125)CuO(4). From a quantitative analysis, we find that the temperature-dependent anisotropy of the susceptibility, observed in both the paramagnetic and stripe-ordered phases, directly indicates that localized Cu moments dominate the magnetic response. A field-induced spin-flop transition provides further corroboration for the role of local moments. Contrary to previous analyses of data from polycrystalline samples, we find that a commonly assumed isotropic and temperature-independent contribution from free carriers, if present, must be quite small. Our conclusion is strengthened by extending the quantitative analysis to include crystals of La(2-x)Ba(x)CuO(4) with x=0.095 and 0.155. On the basis of our results, we present a revised interpretation of the temperature and doping dependence of the spin susceptibility in La(2-x)(Sr,Ba)(x)CuO(4).
C1 [Huecker, M.; Gu, G. D.; Tranquada, J. M.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Hucker, M (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
RI Tranquada, John/A-9832-2009; Gu, Genda/D-5410-2013
OI Tranquada, John/0000-0003-4984-8857; Gu, Genda/0000-0002-9886-3255
FU Office of Science, U.S. Department of Energy [DE-AC02-98CH10886]
FX We acknowledge valuable discussions with F. H. L. Essler, J. P. Hill, S.
A. Kivelson, A. Savici, A. M. Tsvelik, and I. Zaliznyak. M. H. is
grateful to B. Buchner, H. Grafe, I. Kiwitz, R. Klingeler, and N.
Tristan for help during the experiment at the IFW-Dresden. This work was
supported by the Office of Science, U.S. Department of Energy under
Contract No. DE-AC02-98CH10886.
NR 68
TC 27
Z9 27
U1 0
U2 4
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 DEC
PY 2008
VL 78
IS 21
AR 214507
DI 10.1103/PhysRevB.78.214507
PG 10
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400088
ER
PT J
AU Ingham, B
Toney, MF
Hendy, SC
Cox, T
Fong, DD
Eastman, JA
Fuoss, PH
Stevens, KJ
Lassesson, A
Brown, SA
Ryan, MP
AF Ingham, Bridget
Toney, Michael F.
Hendy, Shaun C.
Cox, Timothy
Fong, Dillon D.
Eastman, Jeffrey A.
Fuoss, Paul H.
Stevens, Kevin J.
Lassesson, Andreas
Brown, S. A.
Ryan, Mary P.
TI Particle size effect of hydrogen-induced lattice expansion of palladium
nanoclusters
SO PHYSICAL REVIEW B
LA English
DT Article
DE lattice constants; metal clusters; nanostructured materials; palladium;
particle size; solubility; surfactants; X-ray diffraction
ID PRESSURE-COMPOSITION ISOTHERMS; NANOCRYSTALLINE PALLADIUM;
NANOPARTICLES; HYDRIDE; CLUSTERS; METALS; RANGE
AB In situ synchrotron x-ray diffraction experiments on bare palladium nanoclusters prepared by inert-gas aggregation and size selected (1.7-6.0 nm) show significant changes in lattice parameter upon hydrogen loading and a narrowing of the miscibility gap, as the cluster size decreases. The results show that the miscibility gap is open for all cluster sizes studied, in contrast to previous literature results from surfactant-encapsulated palladium clusters. We interpret these results by showing that the nature of the surface is critical in the hydrogenation behavior of the nanoclusters.
C1 [Ingham, Bridget; Hendy, Shaun C.] Ind Res Ltd, Lower Hutt 5040, New Zealand.
[Ingham, Bridget; Toney, Michael F.] Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
[Hendy, Shaun C.; Cox, Timothy] Victoria Univ Wellington, MacDiarmid Inst Adv Mat & Nanotechnol, Wellington 6140, New Zealand.
[Fong, Dillon D.; Eastman, Jeffrey A.; Fuoss, Paul H.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Stevens, Kevin J.] Quest Reliabil Ltd, Lower Hutt 5040, New Zealand.
[Lassesson, Andreas] Univ Canterbury, Nanocluster Devices Ltd, Christchurch 8140, New Zealand.
[Brown, S. A.] Univ Canterbury, Nanostruct Engn Sci & Technol Grp, Dept Phys & Astron, Christchurch 8140, New Zealand.
[Brown, S. A.] Univ Canterbury, MacDiarmid Inst Adv Mat & Nanotechnol, Christchurch 8140, New Zealand.
[Ryan, Mary P.] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2AZ, England.
[Ryan, Mary P.] Univ London Imperial Coll Sci Technol & Med, London Ctr Nanotechnol, London SW7 2AZ, England.
RP Ingham, B (reprint author), Ind Res Ltd, POB 31-310, Lower Hutt 5040, New Zealand.
RI Hendy, Shaun/A-9776-2008; Brown, Simon/C-1014-2008; Eastman,
Jeffrey/E-4380-2011;
OI Hendy, Shaun/0000-0003-3468-6517; Brown, Simon/0000-0002-6041-4331;
Ryan, Mary/0000-0001-8582-3003; Eastman, Jeff/0000-0002-0847-4265
FU U.S. Department of Energy; Office of Science; Office of Basic Energy
Sciences [DE-AC02-06CH11357]; New Zealand Foundation for Research,
Science and Technology [CO8X0409]
FX 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 No. DE-AC02-06CH11357. Portions of this
research were carried out at the Stanford Synchrotron Radiation
Laboratory, a national user facility operated by Stanford University on
behalf of the U. S. Department of Energy, Office of Basic Energy
Sciences. Funding was provided in part by the New Zealand Foundation for
Research, Science and Technology under Contract No. CO8X0409. The
authors wish to thank BESSRC-CAT and Peter Baldo for beamline support.
NR 27
TC 41
Z9 41
U1 1
U2 25
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD DEC
PY 2008
VL 78
IS 24
AR 245408
DI 10.1103/PhysRevB.78.245408
PG 5
WC Physics, Condensed Matter
SC Physics
GA 391PY
UT WOS:000262246400075
ER
PT J
AU Khodas, M
Vavilov, MG
AF Khodas, Maxim
Vavilov, Maxim G.
TI Effect of microwave radiation on the nonlinear resistivity of a
two-dimensional electron gas at large filling factors
SO PHYSICAL REVIEW B
LA English
DT Article
DE Boltzmann equation; electric fields; magnetic fields; short-range order;
two-dimensional electron gas
ID CYCLOTRON-RESONANCE; OSCILLATIONS; MAGNETORESISTANCE
AB We study transport properties of a two-dimensional electron gas, placed in a classically strong perpendicular magnetic field and in constant and oscillating in-plane electric fields. The analysis is based on a quantum Boltzmann equation derived for a weakly disordered two-dimensional electron gas. We consider disordered potential with both long- and short-range correlations. Electron scattering off such disorder is not limited to small change in momentum direction, but occurs on an arbitrary angle, including the backscattering. The nonlinearity of the transport in the considered system is a consequence of two coexisting effects: formation of a nonequilibrium distribution function of electrons and modification of the scattering rate off the disorder in the presence of dc and ac electric fields. This work describes both effects in a unified way. The calculated dissipative component of electric current oscillates as a function of the electric-field strength and frequency of microwave radiation in qualitative agreement with experiments.
C1 [Khodas, Maxim] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA.
[Khodas, Maxim] Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
[Vavilov, Maxim G.] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
RP Khodas, M (reprint author), Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA.
RI Vavilov, Maxim/C-1147-2009
FU DOE [DE-FG02-08ER46482]; BNL LDRD [08-002, DE-AC02-98CH10886]; U. S.
Department of Energy
FX We thank I. Aleiner, I. Dmitriev, A. Kamenev, B. I. Shklovskii, and M.
A. Zudov for useful discussions. M. K. is supported by DOE Grant No.
DE-FG02-08ER46482 and BNL LDRD Grant No. 08-002 under DE-AC02-98CH10886
with the U. S. Department of Energy. M. G. V. is grateful to the Aspen
Center for Physics, where a part of this work was done.
NR 42
TC 50
Z9 50
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 DEC
PY 2008
VL 78
IS 24
AR 245319
DI 10.1103/PhysRevB.78.245319
PG 17
WC Physics, Condensed Matter
SC Physics
GA 391PY
UT WOS:000262246400063
ER
PT J
AU Kolesnik, S
Dabrowski, B
Chmaissem, O
AF Kolesnik, S.
Dabrowski, B.
Chmaissem, O.
TI Structural and physical properties of SrMn1-xRuxO3 perovskites
SO PHYSICAL REVIEW B
LA English
DT Article
DE antiferromagnetic materials; colossal magnetoresistance; crystal
structure; exchange interactions (electron); ferromagnetic materials;
magnetic susceptibility; magnetic transitions; manganese compounds;
neutron diffraction; solid-state phase transformations; space groups;
spin glasses; strontium compounds
ID ENHANCED MAGNETORESISTANCE; SRRUO3; SUBSTITUTION; MANGANITES; SYSTEM;
SITE
AB We combine the results of magnetic and transport measurements with neutron-diffraction data to construct the structural and magnetic phase diagram of the entire family of SrMn1-xRuxO3 (0 <= x <= 1) perovskites. We have found antiferromagnetic (AF) ordering of the C type for lightly Ru-substituted materials (0.06 <= x <= 0.5) in a similar manner to RySr1-yMnO3 (R=La,Pr) due to the generation of Mn3+ in both families of manganite perovskites by either B-site substitution of Ru5+ for Mn4+ or A-site substitution of R3+ for Sr2+. This similarity is driven by the same ratio of d(4)/d(3) ions in both classes of materials for equivalent substitution level. In both cases, a tetragonal lattice distortion is observed, which for some compositions (0.06 <= x <= 0.2) is coupled to a C-type AF transition and results in a first-order magnetic and resistive transition. Heavily substituted SrMn1-xRuxO3 materials are ferromagnetic due to dominating exchange interactions between the Ru4+ ions. Intermediate substitution (0.6 <= x <= 0.7) leads to a spin-glass behavior instead of a quantum critical point reported previously in single crystals due to enhanced disorder.
C1 [Kolesnik, S.] No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Kolesnik, S (reprint author), No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
FU NSF [DMR-0706610]; U.S. Department of Energy [DE-AC02-06CH11357]
FX Work at NIU was supported by the NSF (Contract No. DMR-0706610). Work at
Argonne National Laboratory was supported by the U.S. Department of
Energy under Contract No. DE-AC02-06CH11357.
NR 31
TC 26
Z9 27
U1 4
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 DEC
PY 2008
VL 78
IS 21
AR 214425
DI 10.1103/PhysRevB.78.214425
PG 7
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400070
ER
PT J
AU Konik, RM
Essler, FHL
Tsvelik, AM
AF Konik, R. M.
Essler, F. H. L.
Tsvelik, A. M.
TI Modeling magnetic fluctuations in the stripe ordered state
SO PHYSICAL REVIEW B
LA English
DT Article
DE barium compounds; fluctuations in superconductors; high-temperature
superconductors; Hubbard model; lanthanum compounds; magnetic
susceptibility; neutron diffraction; RPA calculations; strontium
compounds
ID HIGH-TEMPERATURE SUPERCONDUCTOR; COPPER-OXIDE SUPERCONDUCTORS; T-J
MODEL; TRANSITION-TEMPERATURE; SPIN EXCITATIONS; 2-LEG LADDER;
DOMAIN-WALLS; PHASE; CUPRATE; LA2-XBAXCUO4
AB In this work we study the magnetic behavior of a simple model of the stripe ordered phase of the cuprates, an array of alternating coupled doped and undoped two-leg Hubbard-type ladders. To obtain the coupled ladders' magnetic response, we employ available dynamical susceptibilities of the individual two-leg ladders and treat the interladder coupling in a random phase approximation. Strikingly, we find two possible scenarios for the ordered state induced by the coupling between ladders: the spin modulation may both occur in the conventional fashion, perpendicular to the direction of the stripes, but it may also occur parallel to the stripe direction. These two scenarios are differentiated according to different microscopic realizations of the component doped ladders. We argue that inelastic neutron scattering experiments on two stripe ordered cuprates, La1.875Ba0.125CuO4 and La2-xSrxCuO4 at x similar to 0.125, do not readily distinguish between these scenarios due to manner in which stripes form in these materials.
C1 [Konik, R. M.; Tsvelik, A. M.] Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
[Essler, F. H. L.] Univ Oxford, Rudolph Peierls Ctr Theoret Phys, Oxford OX1 3NP, England.
RP Konik, RM (reprint author), Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
RI Konik, Robert/L-8076-2016
OI Konik, Robert/0000-0003-1209-6890
NR 63
TC 11
Z9 11
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD DEC
PY 2008
VL 78
IS 21
AR 214509
DI 10.1103/PhysRevB.78.214509
PG 10
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400090
ER
PT J
AU Lany, S
AF Lany, Stephan
TI Semiconductor thermochemistry in density functional calculations
SO PHYSICAL REVIEW B
LA English
DT Article
DE catalysts; chemical potential; density functional theory; enthalpy; heat
of formation; insulating materials; least squares approximations;
semiconductor materials; surface reconstruction; total energy
ID AUGMENTED-WAVE METHOD; THERMODYNAMIC PROPERTIES; ELECTRONIC-STRUCTURE;
GAN; ENERGETICS; GERMANIUM; NITRIDE; GALLIUM; EPITAXY; ENERGY
AB The local-density and generalized gradient approximations (LDA and GGA) to density functional theory (DFT) exhibit incomplete error cancellation when energy differences are taken between chemically dissimilar systems. This energy inconsistency is manifested, e.g., in the tendency to underestimate the heat (enthalpy) of formation of semiconducting and insulating compounds in LDA and, even more so, in GGA. Considering a set of 61 compounds that can be formed from 14 elements (cations: Cu, Mg, Ca, Zn, Cd, Al, Ga, and In; anions: N, P, As, O, S, and Se), optimized elemental reference energies are determined by least-squares error minimization of an overdetermined set of linear equations. These elemental energies are "optimally consistent" with the DFT energies of the semiconductor compounds and imply corrections of up to 1 eV compared to the respective LDA or GGA energies. While these "corrections" are not to be understood to yield the correct absolute total energies of the elements, they are proposed to give appropriate bounds for the chemical potentials for thermodynamic processes in semiconductors and insulators, such as, e.g., defect formation, surface reconstruction, or catalytic processes. The present model allows to evaluate thermodynamic processes using DFT energy differences taken only between systems that are expected to show good error cancellation.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Lany, S (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
OI Lany, Stephan/0000-0002-8127-8885
FU U. S. Department of Energy [DE-AC36-08GO28308]
FX This work was funded by the U. S. Department of Energy, under Contract
No. DE-AC36-08GO28308 through NREL's laboratory directed research and
development program.
NR 48
TC 59
Z9 59
U1 5
U2 33
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 DEC
PY 2008
VL 78
IS 24
AR 245207
DI 10.1103/PhysRevB.78.245207
PG 8
WC Physics, Condensed Matter
SC Physics
GA 391PY
UT WOS:000262246400043
ER
PT J
AU Lany, S
Zunger, A
AF Lany, Stephan
Zunger, Alex
TI Assessment of correction methods for the band-gap problem and for
finite-size effects in supercell defect calculations: Case studies for
ZnO and GaAs
SO PHYSICAL REVIEW B
LA English
DT Article
DE crystal defects; density functional theory; energy gap; gallium
arsenide; III-V semiconductors; II-VI semiconductors; impurities;
vacancies (crystal); zinc compounds
ID DENSITY-FUNCTIONAL THEORY; AUGMENTED-WAVE METHOD; ELECTRONIC-STRUCTURE;
SELF-INTERACTION; POINT-DEFECTS; III-V; MICROSCOPIC ORIGIN; NATIVE
DEFECTS; F-CENTRE; SEMICONDUCTORS
AB Contemporary theories of defects and impurities in semiconductors rely to a large extent on supercell calculations within density-functional theory using the approximate local-density approximation (LDA) or generalized gradient approximation (GGA) functionals. Such calculations are, however, affected by considerable uncertainties associated with: (i) the "band-gap problem," which occurs not only in the Kohn-Sham single-particle energies but also in the quasiparticle gap (LDA or GGA) calculated from total-energy differences, and (ii) supercell finite-size effects. In the case of the oxygen vacancy in ZnO, uncertainties (i) and (ii) have led to a large spread in the theoretical predictions, with some calculations suggesting negligible vacancy concentrations, even under Zn-rich conditions, and others predicting high concentrations. Here, we critically assess (i) the different methodologies to correct the band-gap problem. We discuss approaches based on the extrapolation of perturbations which open the band gap, and the self-consistent band-gap correction employing the LDA+U method for d and s states simultaneously. From the comparison of the results of different gap-correction, including also recent results from other literature, we conclude that to date there is no universal scheme for band gap correction in general defect systems. Therefore, we turn instead to classification of different types of defect behavior to provide guidelines on how the physically correct situation in an LDA defect calculation can be recovered. (ii) Supercell finite-size effects: We performed test calculations in large supercells of up to 1728 atoms, resolving a long-standing debate pertaining to image charge corrections for charged defects. We show that once finite-size effects not related to electrostatic interactions are eliminated, the analytic form of the image charge correction as proposed by Makov and Payne leads to size-independent defect formation energies, thus allowing the calculation of well-converged energies in fairly small supercells. We find that the delocalized contribution to the defect charge (i.e., the defect-induced change of the charge distribution) is dominated by the dielectric screening response of the host, which leads to an unexpected effective 1/L scaling of the image charge energy, despite the nominal 1/L-3 scaling of the third-order term. Based on this analysis, we suggest that a simple scaling of the first order term by a constant factor (approximately 2/3) yields a simple but accurate image-charge correction for common supercell geometries. Finally, we discuss the theoretical controversy pertaining to the formation energy of the O vacancy in ZnO in light of the assessment of different methodologies in the present work, and we review the present experimental situation on the topic.
C1 [Lany, Stephan; Zunger, Alex] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Lany, S (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
RI Zunger, Alex/A-6733-2013;
OI Lany, Stephan/0000-0002-8127-8885
FU U. S. Department of Energy, of Energy Efficiency and Renewable Energy
[DE-AC36-08GO28308]
FX This work was funded by the U. S. Department of Energy, of Energy
Efficiency and Renewable Energy, under Contract No. DE-AC36-08GO28308 to
NREL. S. L. acknowledges discussions with Hannes Raebiger on the topic
of supercell defect calculations.
NR 150
TC 474
Z9 475
U1 21
U2 170
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD DEC
PY 2008
VL 78
IS 23
AR 235104
DI 10.1103/PhysRevB.78.235104
PG 25
WC Physics, Condensed Matter
SC Physics
GA 391PO
UT WOS:000262245400033
ER
PT J
AU Lee, SK
Eng, PJ
Mao, HK
Shu, JF
AF Lee, Sung Keun
Eng, Peter J.
Mao, Ho-kwang
Shu, Jinfu
TI Probing and modeling of pressure-induced coordination transformation in
borate glasses: Inelastic x-ray scattering study at high pressure
SO PHYSICAL REVIEW B
LA English
DT Article
DE borate glasses; densification; high-pressure solid-state phase
transformations; X-ray scattering
ID SOLID-STATE NMR; BONDING CHANGES; SIO2 GLASS; K-EDGE; SPECTROSCOPY;
MINERALS; LIQUIDS; SILICON; XANES; SHELL
AB Here, we report on the in situ synchrotron inelastic x-ray scattering spectra of Na-borate glasses at high pressure up to 25 GPa. The pressure-induced boron coordination transformation from ([3])B to ([4])B is linear with pressure characterized by a single value of (partial derivative ([3])B/partial derivative P)(T). Previous studies of Li-borate and pure-borate glasses show a nonlinear transformation with multiple (partial derivative ([3])B/partial derivative P)(T) values for different pressure ranges, revealing the important role cation field strength plays in densification and pressure-induced structural changes. Considering the distribution of the energy difference between low- and high-pressure states (Delta epsilon) in the energy landscape and the variance of the ratio Delta epsilon to its pressure gradient (partial derivative Delta epsilon/partial derivative P)(T) as a measure of network flexibility with pressure, an amorphous system with a large variance in Delta epsilon at 1 atm and/or a small (partial derivative Delta epsilon/partial derivative P)(T) may undergo a gradual coordination transformation (e.g., Na borates). In contrast, a system with the opposite behavior (e.g., Li borates) undergoes an abrupt coordination transformation. The results and concepts of this study thus can shed light on opportunities to study the effect of composition on the nature of densification in low-z oxide and other archetypal glasses and melts.
C1 [Lee, Sung Keun] Seoul Natl Univ, Sch Earth & Environm Sci, Seoul 151742, South Korea.
[Eng, Peter J.] Univ Chicago, Consortium Adv Radiat Sources, Chicago, IL 60637 USA.
[Eng, Peter J.] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA.
[Mao, Ho-kwang; Shu, Jinfu] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA.
[Mao, Ho-kwang] Argonne Natl Lab, HPCAT, Adv Photon Source, Argonne, IL 60439 USA.
RP Lee, SK (reprint author), Seoul Natl Univ, Sch Earth & Environm Sci, Seoul 151742, South Korea.
EM sungklee@snu.ac.kr
FU DOE Basic Energy Sciences (BES) [W-31-109-Eng-38]; DOE-BES-Geosciences;
NSF-Earth Sciences; State of Illinois; DOE-BES-Materials Science;
DOE-NNSA; CDAC; NSF; DOD-TACOM; W. M. Keck Foundation; Korea Science and
Engineering Foundation [2007-000-20120]
FX We thank Byungdal So for help with experiments and S. Sen for helpful
discussion. Use of the APS was supported by DOE Basic Energy Sciences
(BES) under Contract No. W-31-109-Eng-38. GSECARS was supported by
DOE-BES-Geosciences, NSF-Earth Sciences, and the State of Illinois.
HPCAT was supported by DOE-BES-Materials Science, DOE-NNSA, CDAC, NSF,
DOD-TACOM, and the W. M. Keck Foundation. S. K. L. was supported by
funds from Korea Science and Engineering Foundation through National
Research Laboratory (Grant No. 2007-000-20120).
NR 42
TC 17
Z9 17
U1 1
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 DEC
PY 2008
VL 78
IS 21
AR 214203
DI 10.1103/PhysRevB.78.214203
PG 6
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400036
ER
PT J
AU Liu, Y
Paggel, JJ
Upton, MH
Miller, T
Chiang, TC
AF Liu, Y.
Paggel, J. J.
Upton, M. H.
Miller, T.
Chiang, T.-C.
TI Quantized electronic structure and growth of Pb films on highly oriented
pyrolytic graphite
SO PHYSICAL REVIEW B
LA English
DT Article
DE band structure; dispersion relations; effective mass; graphite; lead;
metallic thin films; monolayers; photoemission; quantum wells; surface
energy
ID QUANTUM-WELL STATES; THIN-FILMS; SILVER; ISLANDS; PHYSICS; AG
AB We have measured the electronic structure of thin Pb films grown on highly oriented pyrolytic graphite (HOPG) by angle-resolved photoemission spectroscopy. Quantum well states (QWSs) corresponding to confined Pb valence electrons are observed. Their energy positions are fixed, but their intensities evolve for increasing Pb coverages. The results indicate that the films are rough, consisting of multiple thicknesses. Nevertheless, the thickness distribution is sufficiently narrow to allow a unique assignment for each QWS peak in terms of a quantum number and the exact film thickness in atomic layers. For increasing Pb coverages of up to 10 monolayers (ML), the even film thicknesses of 2, 4, 6, 8, and 10 ML are much more prevalent than the odd film thicknesses of 1, 3, 5, 7, and 9 ML, thus suggesting significant differences in surface energy between the even and odd thicknesses. These results are consistent with an available first-principles calculation of the surface energies of freestanding films; an implication is that the interaction between the Pb film and the HOPG substrate is weak. The in-plane dispersion relations of the QWSs are measured. The effective masses at the surface zone center agree well with the results calculated from the bulk Pb band structure, in sharp contrast to the strongly enhanced or anomalous effective masses in Pb films grown on Si(111) as reported previously. This finding indicates that the anomalous effective masses in Pb/Si(111) are not caused by increased electron correlation effects in a confined geometry, but are rather attributable to a strong interfacial interaction between the QWSs and the substrate electronic structure.
C1 [Liu, Y.; Chiang, T.-C.] Univ Illinois, Dept Phys, Urbana, IL 61801 USA.
[Liu, Y.; Miller, T.; Chiang, T.-C.] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA.
[Paggel, J. J.] Continental Automot GmbH, D-93055 Regensburg, Germany.
[Upton, M. H.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Liu, Y (reprint author), Univ Illinois, Dept Phys, 1110 W Green St, Urbana, IL 61801 USA.
RI Chiang, Tai/H-5528-2011; Liu, Yang/I-2806-2012
OI Liu, Yang/0000-0001-6506-5903
FU U. S. Department of Energy [DE-FG02-07ER46383]; Petroleum Research Fund;
U. S. National Science Foundation [DMR-05-03323, DMR-05-37588]
FX This work was supported by the U. S. Department of Energy (Grant No.
DE-FG02-07ER46383). We acknowledge the Petroleum Research Fund,
administered by the American Chemical Society, and the U. S. National
Science Foundation (Grant No. DMR-05-03323) for partial support of the
personnel and the beamline facilities at the Synchrotron Radiation
Center. The Synchrotron Radiation Center is supported by the U. S.
National Science Foundation (Grant No. DMR05-37588). The tight-binding
code used for the bulk band-structure calculation in this study was
provided by M. J. Mehl of the Naval Research Laboratory under the U. S.
Department of Defense CHSSI program.
NR 36
TC 11
Z9 11
U1 3
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 DEC
PY 2008
VL 78
IS 23
AR 235437
DI 10.1103/PhysRevB.78.235437
PG 6
WC Physics, Condensed Matter
SC Physics
GA 391PO
UT WOS:000262245400123
ER
PT J
AU Lu, TM
Sun, L
Tsui, DC
Lyon, S
Pan, W
Muhlberger, M
Schaffler, F
Liu, J
Xie, YH
AF Lu, T. M.
Sun, L.
Tsui, D. C.
Lyon, S.
Pan, W.
Muehlberger, M.
Schaeffler, F.
Liu, J.
Xie, Y. H.
TI In-plane field magnetoresistivity of Si two-dimensional electron gas in
Si/SiGe quantum wells at 20 mK
SO PHYSICAL REVIEW B
LA English
DT Article
DE electronic density of states; elemental semiconductors; Ge-Si alloys;
magnetoresistance; metal-insulator transition; semiconductor quantum
wells; silicon; two-dimensional electron gas
ID PARALLEL MAGNETIC-FIELD; DIMENSIONS; PHASE
AB We report measurements of in-plane field magnetoresistivity of the two-dimensional electrons in two Si/SiGe quantum wells with different disorder strength at 20 mK. For both samples, the ratio of the saturation resistivity in the high magnetic field to the zero-field resistivity was approximately constant in the high-density limit. In the metallic to insulating transition (MIT) regime, it is strongly enhanced and appears diverging as the electron density approaches a sample-dependent characteristic density n(*). n(*) is below n(c), the critical density of MIT at which the temperature dependence of resistivity changes sign. Disorder is believed to play an important role in this phenomenon. Furthermore, the field at which the magnetoresistivity saturates appears to extrapolate to zero, suggesting that ferromagnetic instability does not occur in Si/SiGe, at least down to n similar to 0.3x10(11)/cm(2).
C1 [Lu, T. M.; Sun, L.; Tsui, D. C.; Lyon, S.] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA.
[Pan, W.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Muehlberger, M.; Schaeffler, F.] Univ Linz, Inst Halbleiterphys, A-4040 Linz, Austria.
[Liu, J.; Xie, Y. H.] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA.
RP Lu, TM (reprint author), Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA.
EM tmlu@princeton.edu
RI Muhlberger, Michael/A-6586-2010; Schaffler, Friedrich/C-7026-2017;
OI Schaffler, Friedrich/0000-0002-7093-2554; Muhlberger,
Michael/0000-0001-7542-8552
FU DOE; NSF [DMR-0084173]; NSF-MRSEC [DMR-0213706]; DOE/Basic Energy
Science; AFOSR [FA9550-04-1-0370]; FWF [SFB025]; State of Florida
FX The work at Princeton was funded by the DOE and the NSF, and T. M. L.
was supported by NSF-MRSEC under Grant No. DMR-0213706. The work at
Sandia was supported by DOE/Basic Energy Science. 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 No. DE-AC04-94AL85000.
Part of the UCLA and Princeton effort was supported by AFOSR under Grant
No. FA9550-04-1-0370, Donald Silversmith. Sample growth was supported by
FWF (Vienna, Austria) via project SFB025. 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 DOE. The authors thank E. Palm, T. Murphy, G. Jones,
J. Park, and S. Hannahs for their assistance in experiment.
NR 14
TC 14
Z9 14
U1 0
U2 4
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 DEC
PY 2008
VL 78
IS 23
AR 233309
DI 10.1103/PhysRevB.78.233309
PG 4
WC Physics, Condensed Matter
SC Physics
GA 391PO
UT WOS:000262245400016
ER
PT J
AU MacLaughlin, DE
Nambu, Y
Nakatsuji, S
Heffner, RH
Shu, L
Bernal, OO
Ishida, K
AF MacLaughlin, D. E.
Nambu, Y.
Nakatsuji, S.
Heffner, R. H.
Shu, Lei
Bernal, O. O.
Ishida, K.
TI Unconventional spin freezing and fluctuations in the frustrated
antiferromagnet NiGa2S4
SO PHYSICAL REVIEW B
LA English
DT Article
DE antiferromagnetic materials; gallium compounds; magnetic transitions;
muon probes; nickel compounds; spin fluctuations
ID RELAXATION; LATTICE; DYNAMICS; ROTATION
AB Muon spin rotation (mu SR) experiments reveal unconventional spin freezing and dynamics in the two-dimensional (2D) triangular lattice antiferromagnet NiGa2S4. Long-lived disordered Ni-spin freezing (correlation time greater than or similar to 10(-6) s at 2 K) sets in below T-f=8.5 +/- 0.5 K with a mean-field-like temperature dependence. The observed exponential temperature dependence of the muon spin relaxation above T-f is strong evidence for 2D critical spin fluctuations. Slow Ni-spin fluctuations coexist with quasistatic magnetism at low temperatures but are rapidly suppressed for fields greater than or similar to 10 mT, in marked contrast with the field-independent specific heat. The mu SR and bulk susceptibility data indicate a well-defined 2D phase transition at T-f, below which NiGa2S4 is neither a conventional magnet nor a singlet spin liquid.
C1 [MacLaughlin, D. E.; Shu, Lei] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA.
[Nambu, Y.; Nakatsuji, S.] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan.
[Heffner, R. H.] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan.
[Heffner, R. H.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Bernal, O. O.] Calif State Univ Los Angeles, Dept Phys & Astron, Los Angeles, CA 90032 USA.
[Ishida, K.] Kyoto Univ, Grad Sch Sci, Dept Phys, Kyoto 6068502, Japan.
RP MacLaughlin, DE (reprint author), Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA.
RI Nambu, Yusuke/C-3863-2012; Shu, Lei/E-7524-2012
OI Nambu, Yusuke/0000-0003-1167-7124;
FU U. S. NSF [0422674, 0604015]; JSPS; Grant-in-Aid for Scientific Research
on Priority Areas (Tokyo) [19052003]
FX We are grateful for technical assistance from the TRIUMF Centre for
Molecular and Materials Science, where these experiments were carried
out. We wish to thank H. Kawamura, Y. Maeno, and R. R. P. Singh for
useful discussions and K. Onuma for help with the experiments. This work
was supported by the U. S. NSF under Grants No. 0422674 (Riverside) and
No. 0604015 (Los Angeles), by Grants-in-Aid for Scientific Research from
JSPS, and by a Grant-in-Aid for Scientific Research on Priority Areas
under Grant No. 19052003 (Tokyo).
NR 20
TC 22
Z9 22
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 DEC
PY 2008
VL 78
IS 22
AR 220403
DI 10.1103/PhysRevB.78.220403
PG 4
WC Physics, Condensed Matter
SC Physics
GA 391PM
UT WOS:000262245200004
ER
PT J
AU Mo, HD
Nelson, CS
Bezmaternykh, LN
Temerov, VT
AF Mo, Haiding
Nelson, Christie S.
Bezmaternykh, Leonard N.
Temerov, V. T.
TI Magnetic structure of the field-induced multiferroic GdFe3(BO3)(4)
SO PHYSICAL REVIEW B
LA English
DT Article
DE ferromagnetic materials; gadolinium compounds; iron compounds; magnetic
structure; multiferroics; Neel temperature; spin dynamics; X-ray
scattering
ID IRON BORATE GDFE3(BO3)(4); X-RAY-SCATTERING; POLARIZATION DEPENDENCE;
EXCHANGE SCATTERING; RESONANCE; FERROELECTRICITY
AB We report a magnetic x-ray scattering study of the field-induced multiferroic GdFe3(BO3)(4). Resonant x-ray magnetic scattering at the Gd L-II,L-III edges indicates that the Gd moments order at T-N approximate to 37 K. The magnetic structure is incommensurate below T-N, with the incommensurability decreasing monotonically with decreasing temperature until a transition to a commensurate magnetic phase is observed at T approximate to 10 K. Both the Gd and Fe moments undergo a spin reorientation transition at T-SR approximate to 9 K such that the moments are oriented along the crystallographic c axis at low temperatures. With magnetic field applied along the a axis, our measurements suggest that the field-induced polarization phase has a commensurate magnetic structure with Gd moments rotated similar to 45 degrees toward the basal plane, which is similar to the magnetic structure of the Gd subsystem observed in zero field between 9 and 10 K, and the Fe subsystem has a ferromagnetic component in the basal plane.
C1 [Mo, Haiding; Nelson, Christie S.] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
[Bezmaternykh, Leonard N.; Temerov, V. T.] RAS, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia.
RP Mo, HD (reprint author), Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
FU U.S. Department of Energy [DE-AC02-98CH10886]
FX We thank W. Schoenig, D. Coburn, S. Wilkins, and J. Hill for their
support at X22C, S. LaMarra for his support at X21, and D. Connor for a
critical reading of the manuscript. Use of the National Synchrotron
Light Source, Brookhaven National Laboratory was supported by the U.S.
Department of Energy, Office of Science, Office of Basic Energy
Sciences, under Contract No. DE-AC02-98CH10886.
NR 35
TC 21
Z9 21
U1 0
U2 8
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 DEC
PY 2008
VL 78
IS 21
AR 214407
DI 10.1103/PhysRevB.78.214407
PG 9
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400052
ER
PT J
AU Ni, N
Tillman, ME
Yan, JQ
Kracher, A
Hannahs, ST
Bud'ko, SL
Canfield, PC
AF Ni, N.
Tillman, M. E.
Yan, J. -Q.
Kracher, A.
Hannahs, S. T.
Bud'ko, S. L.
Canfield, P. C.
TI Effects of Co substitution on thermodynamic and transport properties and
anisotropic H-c2 in Ba(Fe1-xCox)(2)As-2 single crystals
SO PHYSICAL REVIEW B
LA English
DT Article
DE barium compounds; cobalt compounds; electrical resistivity; iron
compounds; magnetic transitions; phase diagrams; phase separation;
solid-state phase transformations; superconducting critical field;
superconducting materials; thermodynamic properties
AB Single crystalline samples of Ba(Fe1-xCox)(2)As-2 with x < 0.12 have been grown and characterized via microscopic, thermodynamic, and transport measurements. With increasing Co substitution, the thermodynamic and transport signatures of the structural (high-temperature tetragonal to low-temperature orthorhombic) and magnetic (high-temperature nonmagnetic to low-temperature antiferromagnetic) transitions are suppressed at a rate of roughly 15 K/% Co. In addition, for x >= 0.038 superconductivity is stabilized, rising to a maximum T-c of approximately 23 K for x approximate to 0.07 and decreasing for higher x values. The T-x phase diagram for Ba(Fe1-xCox)(2)As-2 indicates that either superconductivity can exist in both low-temperature crystallographic phases or that there is a structural phase separation. Anisotropic superconducting upper critical-field data [H-c2(T)] show a significant and clear change in anisotropy between samples that have higher temperature structural phase transitions and those that do not. These data show that the superconductivity is sensitive to the suppression of the higher temperature phase transition.
C1 [Ni, N.; Tillman, M. E.; Yan, J. -Q.; Kracher, A.; Bud'ko, S. L.; Canfield, P. C.] US DOE, Ames Lab, Ames, IA 50011 USA.
[Ni, N.; Tillman, M. E.; Yan, J. -Q.; Kracher, A.; Bud'ko, S. L.; Canfield, P. C.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Hannahs, S. T.] Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
RP Ni, N (reprint author), US DOE, Ames Lab, Ames, IA 50011 USA.
RI Canfield, Paul/H-2698-2014; Hannahs, Scott/B-1274-2008
OI Hannahs, Scott/0000-0002-5840-7714
FU Basic Energy Sciences, U.S. Department of Energy [DE-AC02-07CH11358];
National High Magnetic Field Laboratory; NSF Cooperative Agreement
[DMR-0084173]; State of Florida; DOE
FX Work at the Ames Laboratory was supported by the Basic Energy Sciences,
U.S. Department of Energy under Contract No. DE-AC02-07CH11358. 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 DOE. We thank Kevin
Dennis and R. William McCallum for useful discussions and experimental
assistance.
NR 31
TC 394
Z9 395
U1 10
U2 55
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 DEC
PY 2008
VL 78
IS 21
AR 214515
DI 10.1103/PhysRevB.78.214515
PG 9
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400096
ER
PT J
AU Painter, GS
Averill, FW
Becher, PF
Shibata, N
van Benthem, K
Pennycook, SJ
AF Painter, Gayle S.
Averill, Frank W.
Becher, Paul F.
Shibata, Naoya
van Benthem, Klaus
Pennycook, Stephen J.
TI First-principles study of rare earth adsorption at beta-Si3N4 interfaces
SO PHYSICAL REVIEW B
LA English
DT Article
DE adsorption; band structure; bonds (chemical); ceramics; crystal
microstructure; density functional theory; grain growth; interface
structure; rare earth metals; scanning-transmission electron microscopy;
silicon compounds
ID SILICON-NITRIDE CERAMICS; TRANSMISSION ELECTRON-MICROSCOPY; SI3N4
CERAMICS; MICROSTRUCTURAL DESIGN; PHASE-TRANSFORMATION; INTERGRANULAR
FILMS; COHESIVE PROPERTIES; FRACTURE-TOUGHNESS; GRAIN-BOUNDARIES; WAVE
METHOD
AB Structural characterization of rare earth adsorption at surfaces or interfaces of beta-Si3N4 grains within silicon nitride ceramics has recently been reported by three different groups using Z-contrast scanning transmission electron microscopy (STEM) imaging. Here we report the electronic structure basis for these observations and discuss the origin of similarities and differences among the lanthanides characterized in that work. Along with the features that are well described by a first-principles cluster and surface slab models, we identify those differences in the experiment and theory that warrant further investigation. Stereochemical bonding factors are found to determine adsorption site preferences as opposed to ionic size effects. The set of possible bond sites is a characteristic of the beta-Si3N4 interface; however the strength of the rare earth-interface bonding is determined by the electronic structure of the nitride surface and the specific adsorbate. This is the principal factor controlling the effects of dopants on the alpha ->beta phase transformation and on the beta-Si3N4 grain growth at high temperature as well as the subsequent microstructure of the ceramic.
C1 [Averill, Frank W.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Shibata, Naoya] Univ Tokyo, Inst Engn Innovat, Tokyo 1138656, Japan.
[van Benthem, Klaus] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
[Painter, Gayle S.; Averill, Frank W.; Becher, Paul F.; Pennycook, Stephen J.] Oak Ridge Natl Lab, Mat Sci & Technol Lab, Oak Ridge, TN 37831 USA.
RI Shibata, Naoya/E-5327-2013
FU Division of Materials Sciences and Engineering; U. S. Department of
Energy [DE-AC05-00OR22725]; European Community [GRD2-200-3030351];
Division of Scientific User Facilities; Alexander von Humboldt
Foundation; Ministry of Education, Culture, Sports, Science and
Technology (MEXT, Japan) [20686042]
FX Research was supported by the Division of Materials Sciences and
Engineering, U. S. Department of Energy under Contract No.
DE-AC05-00OR22725 with UT-Battelle, LLC, and the European Community
"Growth" Program, NANOAM Contract No. GRD2-200-3030351. K. V. B. was
also supported by the Division of Scientific User Facilities, by
appointment to the ORNL Postdoctoral Research Program administered
jointly by ORNL and ORISE, and a FeodorLynen scholarship of the
Alexander von Humboldt Foundation. N.S. was partly supported by
Grant-in-Aid for Young Scientists (A) (Grant No. 20686042) from the
Ministry of Education, Culture, Sports, Science and Technology (MEXT,
Japan). The authors thank C. L. Fu and J. R. Morris for helpful comments
on this paper.
NR 45
TC 25
Z9 25
U1 2
U2 30
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 DEC
PY 2008
VL 78
IS 21
AR 214206
DI 10.1103/PhysRevB.78.214206
PG 9
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400039
ER
PT J
AU Parker, D
Balatsky, AV
AF Parker, David
Balatsky, Alexander V.
TI Quantitative evidence for spin-fluctuation-mediated higher-harmonic
d-wave components: Hole- and electron-doped cuprates
SO PHYSICAL REVIEW B
LA English
DT Article
DE cerium compounds; d-wave superconductivity; Fermi surface;
high-temperature superconductors; praseodymium compounds; spin
fluctuations
ID HIGH-TEMPERATURE SUPERCONDUCTIVITY; DENSITY-OF-STATES; ORDER-PARAMETER;
PAIRING SYMMETRY; COPPER OXIDES; YBA2CU3O7-DELTA; BI2SR2CACU2O8+DELTA;
YBA2CU3O6.95; LA1.86SR0.14CUO4; EXCITATIONS
AB Experimental evidence for higher harmonics in the cuprate d-wave gap function cos(2 phi) or cos(k(x))-cos(k(y)) has been slowly mounting. Here we analyze all of the data that have been generated in this field for both hole-doped and electron-doped cuprates, demonstrating a preponderance of these symmetry-allowed terms. We then show that the simple spin-fluctuation pairing mechanism can reproduce the detailed angular dependence of the gap. We also present an analysis of pseudogap higher-harmonic symmetry based on the picture of the Fermi arcs as being due to lifetime broadening.
C1 [Parker, David] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany.
[Parker, David] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany.
[Parker, David] USN, Res Lab, Washington, DC 20375 USA.
[Balatsky, Alexander V.] Los Alamos Natl Lab, Div Theoret, MS B262, Los Alamos, NM 87545 USA.
RP Parker, D (reprint author), Max Planck Inst Phys Komplexer Syst, Nothnitzer Str 38, D-01187 Dresden, Germany.
FU U.S. DOE
FX This work was supported by the U.S. DOE (A.V.B.).
NR 40
TC 3
Z9 3
U1 0
U2 0
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 DEC
PY 2008
VL 78
IS 21
AR 214502
DI 10.1103/PhysRevB.78.214502
PG 7
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400083
ER
PT J
AU Prozorov, R
Ni, N
Tanatar, MA
Kogan, VG
Gordon, RT
Martin, C
Blomberg, EC
Prommapan, P
Yan, JQ
Bud'ko, SL
Canfield, PC
AF Prozorov, R.
Ni, N.
Tanatar, M. A.
Kogan, V. G.
Gordon, R. T.
Martin, C.
Blomberg, E. C.
Prommapan, P.
Yan, J. Q.
Bud'ko, S. L.
Canfield, P. C.
TI Vortex phase diagram of Ba(Fe0.93Co0.07)(2)As-2 single crystals
SO PHYSICAL REVIEW B
LA English
DT Article
DE barium compounds; cobalt compounds; creep; current density; iron
compounds; magnetic anisotropy; magnetic relaxation; magnetisation;
magneto-optical effects; mixed state; phase diagrams; superconducting
materials; transport processes
ID HIGH-TEMPERATURE SUPERCONDUCTORS; CU-O CRYSTAL; FLUX-CREEP; HARD
SUPERCONDUCTORS; MAGNETIZATION; FILMS
AB Irreversible magnetic properties of Ba(Fe0.93Co0.07)(2)As-2 single crystals were studied by using several techniques including transport, magnetization, and magneto-optics. The mixed-state response was found to be very similar to high-T-c cuprates, such as Y-Ba-Cu-O and Nd-Ce-Cu-O. In particular, we find a nonmonotonic "fishtail" shape of the magnetization loops M(T=const,H) and a corresponding feature in M(T,H=const) scans, as well as a very large magnetic relaxation rate. The supercurrent density, j, in the critical state was evaluated from magnetization and from direct transport measurements close to T-c. At 5 K we estimate a moderate j approximate to 2.6 +/- 0.2x10(5) A/cm(2). Analysis of the temperature and field dependencies of the magnetic relaxation is consistent with the collective pinning and creep (weak pinning and fast creep) model and suggests a crossover from the collective to the plastic creep regime in fields exceeding the field at which the fishtail magnetization is maximum. While the zero-field anisotropy of the magnetic properties in the superconducting state of Ba(Fe0.93Co0.07)(2)As-2 is small, the vortex behavior changes for different orientations of magnetic field with respect to the crystal axes, implying field-dependent anisotropy of pinning properties.
C1 [Prozorov, R.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
RP Prozorov, R (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
EM prozorov@ameslab.gov
RI Prozorov, Ruslan/A-2487-2008; Canfield, Paul/H-2698-2014
OI Prozorov, Ruslan/0000-0002-8088-6096;
FU U. S. Department of EnergyBasic Energy Sciences [DE-AC02-07CH11358];
Alfred P. Sloan Foundation
FX We thank J. Clem, A. Koshelev, R. Mints, and J. Schmalian for helpful
discussions. Work at the Ames Laboratory was supported by the U. S.
Department of EnergyBasic Energy Sciences under Contract No.
DE-AC02-07CH11358. R. P. acknowledges support from Alfred P. Sloan
Foundation.
NR 37
TC 165
Z9 165
U1 1
U2 21
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 DEC
PY 2008
VL 78
IS 22
AR 224506
DI 10.1103/PhysRevB.78.224506
PG 9
WC Physics, Condensed Matter
SC Physics
GA 391PM
UT WOS:000262245200074
ER
PT J
AU Qian, XF
Li, J
Qi, L
Wang, CZ
Chan, TL
Yao, YX
Ho, KM
Yip, S
AF Qian, Xiaofeng
Li, Ju
Qi, Liang
Wang, Cai-Zhuang
Chan, Tzu-Liang
Yao, Yong-Xin
Ho, Kai-Ming
Yip, Sidney
TI Quasiatomic orbitals for ab initio tight-binding analysis
SO PHYSICAL REVIEW B
LA English
DT Article
DE ab initio calculations; band structure; density functional theory;
electronic density of states; elemental semiconductors; Fermi surface;
iron; molybdenum; pseudopotential methods; silicon; silicon compounds;
tight-binding calculations; wide band gap semiconductors
ID AUGMENTED-WAVE METHOD; PARRINELLO MOLECULAR-DYNAMICS; LOCALIZED WANNIER
FUNCTIONS; COMPOSITE ENERGY-BANDS; MINIMAL BASIS-SETS; ULTRASOFT
PSEUDOPOTENTIALS; ELECTRON CORRELATION; MODEL; CRYSTALS; DENSITY
AB Wave functions obtained from plane-wave density-functional theory (DFT) calculations using norm-conserving pseudopotential, ultrasoft pseudopotential, or projector augmented-wave method are efficiently and robustly transformed into a set of spatially localized nonorthogonal quasiatomic orbitals (QOs) with pseudoangular momentum quantum numbers. We demonstrate that these minimal-basis orbitals can exactly reproduce all the electronic structure information below an energy threshold represented in the form of environment-dependent tight-binding Hamiltonian and overlap matrices. Band structure, density of states, and the Fermi surface are calculated from this real-space tight-binding representation for various extended systems (Si, SiC, Fe, and Mo) and compared with plane-wave DFT results. The Mulliken charge and bond order analyses are performed under QO basis set, which satisfy sum rules. The present work validates the general applicability of Slater and Koster's scheme of linear combinations of atomic orbitals and points to future ab initio tight-binding parametrizations and linear-scaling DFT development.
C1 [Li, Ju; Qi, Liang] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA.
[Qian, Xiaofeng; Yip, Sidney] MIT, Dept Nucl Sci & Engn, Cambridge, MA 02139 USA.
[Qian, Xiaofeng; Yip, Sidney] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA.
[Wang, Cai-Zhuang; Chan, Tzu-Liang; Yao, Yong-Xin; Ho, Kai-Ming] Iowa State Univ, US DOE, Dept Phys, Ames, IA 50011 USA.
[Wang, Cai-Zhuang; Chan, Tzu-Liang; Yao, Yong-Xin; Ho, Kai-Ming] Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA.
RP Li, J (reprint author), Univ Penn, Dept Mat Sci & Engn, 3231 Walnut St, Philadelphia, PA 19104 USA.
EM liju@seas.upenn.edu
RI Li, Ju/A-2993-2008; Qi, Liang/A-3851-2010; Yao, Yongxin/B-7320-2008;
Qian, Xiaofeng/E-7727-2012; Qian, Xiaofeng/P-4715-2016
OI Li, Ju/0000-0002-7841-8058; Qi, Liang/0000-0002-0201-9333; Qian,
Xiaofeng/0000-0003-1627-288X; Qian, Xiaofeng/0000-0003-1627-288X
NR 75
TC 44
Z9 45
U1 0
U2 30
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 DEC
PY 2008
VL 78
IS 24
AR 245112
DI 10.1103/PhysRevB.78.245112
PG 22
WC Physics, Condensed Matter
SC Physics
GA 391PY
UT WOS:000262246400024
ER
PT J
AU Reichhardt, C
Reichhardt, CJO
AF Reichhardt, C.
Reichhardt, C. J. Olson
TI Moving vortex phases, dynamical symmetry breaking, and jamming for
vortices in honeycomb pinning arrays
SO PHYSICAL REVIEW B
LA English
DT Article
DE flux flow; flux pinning; type II superconductors
ID FLUX-LINE-LATTICE; II SUPERCONDUCTORS; COMPUTER-SIMULATION; THIN-FILMS;
DRIVEN LATTICES; MAGNETIC DOTS; REGULAR ARRAY; PLASTIC-FLOW; NOISE;
DEFECTS
AB We show using numerical simulations that vortices in honeycomb pinning arrays can exhibit a remarkable variety of dynamical phases that are distinct from those found for triangular and square pinning arrays. In the honeycomb arrays, it is possible for the interstitial vortices to form dimer or higher n-mer states which have an additional orientational degree of freedom that can lead to the formation of vortex molecular crystals. For filling fractions where dimer states appear, a dynamical symmetry breaking can occur when the dimers flow in one of two possible alignment directions. This leads to transport in the direction transverse to the applied drive. We show that dimerization produces distinct types of moving phases which depend on the direction of the driving force with respect to the pinning lattice symmetry. When the dimers are driven along certain directions, a reorientation of the dimers can produce a jamming phenomenon which results in a strong enhancement in the critical depinning force. The jamming can also cause unusual effects such as an increase in the critical depinning force when the size of the pinning sites is reduced.
C1 [Reichhardt, C.; Reichhardt, C. J. Olson] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Reichhardt, C (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
OI Reichhardt, Cynthia/0000-0002-3487-5089
FU U. S. Department of Energy at Los Alamos National Laboratory
[DE-AC52-06NA25396]
FX 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 104
TC 25
Z9 25
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD DEC
PY 2008
VL 78
IS 22
AR 224511
DI 10.1103/PhysRevB.78.224511
PG 19
WC Physics, Condensed Matter
SC Physics
GA 391PM
UT WOS:000262245200079
ER
PT J
AU Sarovar, M
Young, KC
Schenkel, T
Whaley, KB
AF Sarovar, Mohan
Young, Kevin C.
Schenkel, Thomas
Whaley, K. Birgitta
TI Quantum nondemolition measurements of single donor spins in
semiconductors
SO PHYSICAL REVIEW B
LA English
DT Article
DE field effect transistors; hyperfine interactions; magnetic double
resonance; magnetic resonance; magnetoelectronics; quantum theory;
semiconductors; spin systems; two-dimensional electron gas
ID ELECTRICAL DETECTION; COULOMB-BLOCKADE; NUCLEAR-SPIN; SILICON;
RESONANCE; SPECTROSCOPY; SCATTERING; TRANSPORT
AB We propose a technique for measuring the state of a single donor-electron spin using a field-effect transistor induced two-dimensional electron gas and electrically detected magnetic-resonance techniques. The scheme is facilitated by hyperfine coupling to the donor nucleus. We analyze the potential sensitivity and outline experimental requirements. Our measurement provides a single-shot, projective, and quantum nondemolition measurement of an electron-encoded qubit state.
C1 [Sarovar, Mohan; Whaley, K. Birgitta] Univ Calif Berkeley, Dept Chem, Berkeley Ctr Quantum Informat & Computat, Berkeley, CA 94720 USA.
[Young, Kevin C.] Univ Calif Berkeley, Dept Phys, Berkeley Ctr Quantum Informat & Computat, Berkeley, CA 94720 USA.
[Schenkel, Thomas] Univ Calif Berkeley, Lawrence Berkeley Lab, Accelerator & Fus Res Div, Berkeley, CA 94720 USA.
RP Sarovar, M (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley Ctr Quantum Informat & Computat, Berkeley, CA 94720 USA.
RI Sarovar, Mohan/B-5335-2012
FU NSA [MOD713106A]; NSF [EIA-0205641]; DOE [DE-AC02-05CH11231]
FX We thank NSA (Grant No. MOD713106A) for financial support. M. S. and K.
B. W. were also supported by NSF (Grant No. EIA-0205641) and T. S. by
DOE (Contract No. DE-AC02-05CH11231). We are grateful to S. Lyon, A. M.
Tyryshkin, C. C. Lo, and J. Bokor for helpful discussions.
NR 33
TC 24
Z9 24
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD DEC
PY 2008
VL 78
IS 24
AR 245302
DI 10.1103/PhysRevB.78.245302
PG 8
WC Physics, Condensed Matter
SC Physics
GA 391PY
UT WOS:000262246400046
ER
PT J
AU Stone, PR
Bihler, C
Kraus, M
Scarpulla, MA
Beeman, JW
Yu, KM
Brandt, MS
Dubon, OD
AF Stone, P. R.
Bihler, C.
Kraus, M.
Scarpulla, M. A.
Beeman, J. W.
Yu, K. M.
Brandt, M. S.
Dubon, O. D.
TI Compensation-dependent in-plane magnetization reversal processes in
Ga1-xMnxP1-ySy
SO PHYSICAL REVIEW B
LA English
DT Article
ID ION-IMPLANTATION; FERROMAGNETIC SEMICONDUCTORS; GAP; SPINTRONICS;
RESONANCE; (GA,MN)AS
AB We report the effect of dilute alloying of the anion sublattice with S on the in-plane uniaxial magnetic anisotropy and magnetization reversal process in Ga1-xMnxP as measured by both ferromagnetic resonance (FMR) spectroscopy and superconducting quantum interference device (SQUID) magnetometry. At T=5 K, raising the S concentration increases the uniaxial magnetic anisotropy between in-plane < 011 > directions while decreasing the magnitude of the (negative) cubic anisotropy field. Simulation of the SQUID magnetometry indicates that the energy required for the nucleation and growth of domain walls decreases with increasing y. These combined effects have a marked influence on the shape of the field-dependent magnetization curves; while the [0 (1) over bar1] direction remains the easy axis in the plane of the film, the field dependence of the magnetization develops double hysteresis loops in the < 011 > direction as the S concentration increases, similar to those observed for perpendicular magnetization reversal in lightly doped Ga1-xMnxAs. The incidence of double hysteresis loops is explained with a simple model whereby magnetization reversal occurs by a combination of coherent spin rotation and noncoherent spin switching, which is consistent with both FMR and magnetometry experiments. The evolution of magnetic properties with S concentration is attributed to compensation of Mn acceptors by S donors, which results in a lowering of the concentration of holes that mediate ferromagnetism.
C1 [Stone, P. R.; Scarpulla, M. A.; Dubon, O. D.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
[Stone, P. R.; Scarpulla, M. A.; Beeman, J. W.; Yu, K. M.; Dubon, O. D.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Bihler, C.; Kraus, M.; Brandt, M. S.] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany.
RP Stone, PR (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
EM prstone@berkeley.edu; oddubon@berkeley.edu
RI Scarpulla, Michael/C-7941-2009; Yu, Kin Man/J-1399-2012; Brandt,
Martin/C-5151-2017;
OI Yu, Kin Man/0000-0003-1350-9642; Scarpulla, Michael/0000-0002-6084-6839
FU Director; Office of Science; Office of Basic Energy Sciences; Division
of Materials Sciences and Engineering of the U. S. Department of Energy
[DE-AC02-05CH11231]; Deutsche Forschungsgemeinschaft [SFB 631]; Bavaria
California Technology Center; NSF; NDSEG
FX Materials synthesis and SQUID magnetometry experiments at Lawrence
Berkeley National Laboratory were supported by the Director, Office of
Science, Office of Basic Energy Sciences, Division of Materials Sciences
and Engineering of the U. S. Department of Energy under Contract No.
DE-AC02-05CH11231. The FMR work at the Walter Schottky Institut was
supported by Deutsche Forschungsgemeinschaft through SFB 631 and the
Bavaria California Technology Center. P. R. S. acknowledges support from
NSF and NDSEG.
NR 34
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U1 0
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD DEC
PY 2008
VL 78
IS 21
AR 214421
DI 10.1103/PhysRevB.78.214421
PG 9
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400066
ER
PT J
AU Tseng, YC
Haskel, D
Souza-Neto, NM
Mudryk, Y
Pecharsky, VK
Gschneidner, KA
AF Tseng, Y. C.
Haskel, D.
Souza-Neto, N. M.
Mudryk, Ya.
Pecharsky, V. K.
Gschneidner, K. A., Jr.
TI Pressure-induced removal of magnetostructural inhomogeneity in Ge-rich
Gd-5(SixGe1-x)(4) giant magnetocaloric alloys
SO PHYSICAL REVIEW B
LA English
DT Article
DE antiferromagnetic materials; ferromagnetic materials;
ferromagnetic-antiferromagnetic transitions; gadolinium alloys; Ge-Si
alloys; high-pressure effects; magnetic circular dichroism;
magnetisation; magnetocaloric effects; solid-state phase
transformations; X-ray diffraction
ID ADIABATIC TEMPERATURE-CHANGE; MAGNETIC CIRCULAR-DICHROISM; GD-5(SI2GE2);
TRANSITION; GD5SI2GE2
AB We investigate the emergence of ferromagnetism (FM) in low-Si-content Gd-5(SixGe1-x)(4) alloys (x=0.025,0.05,0.075) from within the antiferromagnetic (AFM) phase of the Gd5Ge4 parent compound. X-ray magnetic circular dichroism (XMCD) and bulk magnetization measurements show that all samples exhibit partial FM order at low temperature, but their saturation magnetization is reduced relative to higher-Si-content samples (x=0.125,0.5). This reduced magnetization is due to an incomplete AFM orthorhombic(II)-> FM orthorhombic(I) magnetostructural phase transition upon cooling, as evidenced by x-ray diffraction. High-pressure XMCD measurements in a diamond-anvil cell show that applied pressures of 5.0, 3.0, and 2.0 GPa restore the full saturation magnetization in x=0.025, 0.05, and 0.075 samples, respectively, by stabilizing the FM-O(I) phase. The mixed-phase behavior is also evidenced in dT(c)/dP, which strongly varies with silicon concentration in these samples at low pressures but becomes independent of x at higher pressures where values typical of higher-x samples (0.125 < x < 0.5) are found.
C1 [Tseng, Y. C.] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60201 USA.
[Tseng, Y. C.; Haskel, D.; Souza-Neto, N. M.] Argonne Natl Lab, Adv Photon Source, Magnet Mat Grp, Argonne, IL 60439 USA.
[Mudryk, Ya.; Pecharsky, V. K.; Gschneidner, K. A., Jr.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Pecharsky, V. K.; Gschneidner, K. A., Jr.] Iowa State Univ, Dept Mat & Engn, Ames, IA 50011 USA.
RP Tseng, YC (reprint author), Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60201 USA.
EM haskel@aps.anl.gov
RI Souza-Neto, Narcizo/G-1303-2010
OI Souza-Neto, Narcizo/0000-0002-7474-8017
FU U.S. Department of Energy; Office of Basic Energy Sciences
[DE-AC-02-06CH11357, DE-AC02-07CH1358]; Office of Science
FX The work at Argonne and Ames was supported by the U.S. Department of
Energy, Office of Science and Office of Basic Energy Sciences, under
Contracts No. DE-AC-02-06CH11357 and No. DE-AC02-07CH1358, respectively.
NR 35
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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 DEC
PY 2008
VL 78
IS 21
AR 214433
DI 10.1103/PhysRevB.78.214433
PG 8
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400078
ER
PT J
AU Vlasko-Vlasov, VK
Welp, U
Imre, A
Rosenmann, D
Pearson, J
Kwok, WK
AF Vlasko-Vlasov, V. K.
Welp, U.
Imre, A.
Rosenmann, D.
Pearson, J.
Kwok, W. K.
TI Soft magnetic lithography and giant magnetoresistance in
superconducting/ferromagnetic hybrids
SO PHYSICAL REVIEW B
LA English
DT Article
DE critical currents; ferromagnetic materials; flux flow; flux pinning;
giant magnetoresistance; interface magnetism; lead; magnetic domains;
Permalloy; soft lithography; switching; type I superconductors
ID SUPERCONDUCTOR-FERROMAGNET HETEROSTRUCTURES; DOMAIN-STRUCTURE;
THIN-FILMS; PERPENDICULAR ANISOTROPY; STRAY FIELD; BILAYER; MULTILAYERS;
ARRAYS; DOTS; SUPERLATTICES
AB We demonstrate an approach to create a tunable pinning potential in a superconducting/ferromagnetic (SC/FM) hybrid, allowing the switching of their electronic properties through the application of a small magnetic field. Using direct magneto-optical imaging, macroscopic transport, and magnetic measurements, we show that the alignment of stripe domains in the ferromagnet provides a remarkable directionality for the superconducting vortex motion. An analysis of the anisotropic flux motion demonstrates a substantial critical current anisotropy in the superconductor. The possibility of aligning stable lattices of stripe domains in select directions using in-plane magnetic fields allows the realization of soft magnetic lithography for efficient manipulation of supercurrent flow in SC/FM bilayers. Furthermore, in our samples we observed a pronounced magnetoresistance effect yielding 4 orders of magnitude resistivity change in a few millitesla in-plane field.
C1 [Vlasko-Vlasov, V. K.; Welp, U.; Imre, A.; Rosenmann, D.; Pearson, J.; Kwok, W. K.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Vlasko-Vlasov, VK (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Joshi-Imre, Alexandra/A-2912-2010
OI Joshi-Imre, Alexandra/0000-0002-4271-1623
FU University of Chicago, Argonne, LLC, Operator of Argonne National
Laboratory "Argonne."; U.S. Department of Energy, Office of Science
Laboratory [DEAC02-06CH11357]
FX The authors are grateful to E. B. Sonin and N. B. Kopnin for useful
discussions. The submitted paper was created by the University of
Chicago, Argonne, LLC, Operator of Argonne National Laboratory
"Argonne." Argonne, a U.S. Department of Energy, Office of Science
Laboratory, is operated under Contract No. DEAC02-06CH11357.
NR 77
TC 17
Z9 17
U1 0
U2 10
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 DEC
PY 2008
VL 78
IS 21
AR 214511
DI 10.1103/PhysRevB.78.214511
PG 9
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400092
ER
PT J
AU Vo, NQ
Averback, RS
Bellon, P
Caro, A
AF Vo, Nhon Q.
Averback, Robert S.
Bellon, Pascal
Caro, Alfredo
TI Limits of hardness at the nanoscale: Molecular dynamics simulations
SO PHYSICAL REVIEW B
LA English
DT Article
DE copper; grain boundaries; grain size; hardening; hardness; molecular
dynamics method; nanostructured materials; slip; yield stress
ID NANOCRYSTALLINE METALS; MECHANICAL-BEHAVIOR; COMPUTER-SIMULATION;
GRAIN-BOUNDARIES; DEFORMATION; STRENGTH; MICROSTRUCTURE; NI
AB Contrary to the often reported findings from molecular dynamics computer simulation that metals soften as their grain sizes fall below 10-15 nm, we do not observe such softening in nanocrystalline specimens when they are first thermally relaxed. We offer a simple model that illustrates that the increased hardening is a consequence of grain-boundary relaxation, which suppresses grain-boundary sliding and forces the material to deform by dislocation glide. These observations provide an explanation for why some experiments observe an inverse Hall-Petch relationship at grain sizes below 10-20 nm while others do not.
C1 [Vo, Nhon Q.; Averback, Robert S.; Bellon, Pascal] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA.
[Caro, Alfredo] Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, Livermore, CA 94550 USA.
RP Vo, NQ (reprint author), Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA.
RI Vo, Nhon/E-4599-2010
FU U.S. Department of Energy, Basic Energy Sciences [DEFG0205ER46217]; DOE
National Nuclear Security Administration [DEFG52-06NA26153,]; U.S.
Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]
FX This work was supported by the U. S. Department of Energy, Basic Energy
Sciences under Grant No. DEFG0205ER46217, the DOE National Nuclear
Security Administration under Grant No. DEFG52-06NA26153, and in part
under the auspices of the U.S. Department of Energy by Lawrence
Livermore National Laboratory under Contract No. DE-AC52-07NA27344.
NR 21
TC 27
Z9 27
U1 4
U2 33
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 DEC
PY 2008
VL 78
IS 24
AR 241402
DI 10.1103/PhysRevB.78.241402
PG 4
WC Physics, Condensed Matter
SC Physics
GA 391PY
UT WOS:000262246400012
ER
PT J
AU Wang, YJ
Zhang, JZ
Daemen, LL
Lin, ZJ
Zhao, YS
Wang, LP
AF Wang, Yuejian
Zhang, Jianzhong
Daemen, Luke L.
Lin, Zhijun
Zhao, Yusheng
Wang, Liping
TI Thermal equation of state of rhenium diboride by high
pressure-temperature synchrotron x-ray studies
SO PHYSICAL REVIEW B
LA English
DT Article
DE elastic moduli; equations of state; high-pressure effects;
high-temperature effects; rhenium compounds; thermal expansion;
thermoelasticity; X-ray diffraction
ID NITRIDE
AB The unit-cell volume of rhenium diboride (ReB(2)) has been measured by synchrotron x-ray diffraction at pressures and temperatures of up to 7.5 GPa and 1100 K with a cubic anvil apparatus. From the pressure (P)-volume (V)-temperature (T) measurements, thermoelastic parameters were derived for ReB(2) based on a modified high-T Birch-Murnaghan equation of state and a thermal-pressure approach. With the pressure derivative of the bulk modulus, K(0)('), fixed at 4.0, we obtain: the ambient bulk modulus K(0)=334(23) GPa, temperature derivative of bulk modulus at constant pressure (partial derivative K/partial derivative T)(P)=-0.064(6) GPa K(-1), volumetric thermal expansivity alpha(T)(K(-1))=a+bT with a=1.33(25)x10(-5) K(-1) and b=1.48(64)x10(-8) K(-2), pressure derivative of thermal expansion (partial derivative alpha/partial derivative P)(T)=-5.76(95)x10(-7) GPa(-1) K(-1), and temperature derivative of bulk modulus at constant volume (partial derivative K/partial derivative T)(V)=-0.049(11) GPa K(-1). The ambient bulk modulus derived from this work is comparable to previous experimental and theoretical results. These results, including the ambient bulk modulus and other thermoelastic parameters determined in present study, extend our knowledge of the fundamental thermophysical properties on ReB(2) and are important to the development of theoretical and computational modelings of hard materials.
C1 [Wang, Yuejian; Zhang, Jianzhong; Daemen, Luke L.; Lin, Zhijun; Zhao, Yusheng] Los Alamos Natl Lab, LANSCE Div, Los Alamos, NM 87545 USA.
[Wang, Liping] SUNY Stony Brook, Inst Mineral Phys, Stony Brook, NY 11794 USA.
RP Wang, YJ (reprint author), Los Alamos Natl Lab, LANSCE Div, POB 1663, Los Alamos, NM 87545 USA.
RI Lujan Center, LANL/G-4896-2012; Lin, Zhijun/A-5543-2010;
OI Zhang, Jianzhong/0000-0001-5508-1782
FU Los Alamos National Laboratory; Los Alamos National Security LLC
[DEAC52-06NA25396]; Consortium for Materials Properties Research in
Earth Sciences (COMPRES); NSF [EAR 01-35554]
FX This research was supported by the Los Alamos National Laboratory, which
is operated by Los Alamos National Security LLC under DOE (Contract No.
DEAC52-06NA25396). The experimental work was carried out at beamline
X17B2 of the National Synchrotron Light Source, Brookhaven National
Laboratory, which is supported by the Consortium for Materials
Properties Research in Earth Sciences (COMPRES) under NSF (Cooperative
Agreement No. EAR 01-35554).
NR 27
TC 26
Z9 27
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 DEC
PY 2008
VL 78
IS 22
AR 224106
DI 10.1103/PhysRevB.78.224106
PG 5
WC Physics, Condensed Matter
SC Physics
GA 391PM
UT WOS:000262245200022
ER
PT J
AU Wen, JS
Xu, ZJ
Xu, GY
Tranquada, JM
Gu, G
Chang, S
Kang, HJ
AF Wen, Jinsheng
Xu, Zhijun
Xu, Guangyong
Tranquada, J. M.
Gu, Genda
Chang, S.
Kang, H. J.
TI Magnetic field induced enhancement of spin-order peak intensity in
La1.875Ba0.125CuO4
SO PHYSICAL REVIEW B
LA English
DT Article
DE antiferromagnetic materials; barium compounds; high-temperature
superconductors; lanthanum compounds; neutron diffraction; strips;
superconducting energy gap
ID HIGH-TEMPERATURE SUPERCONDUCTOR; WAVE
AB We report on neutron-scattering results on the impact of a magnetic field on stripe order in the cuprate La1.875Ba0.125CuO4. It is found that a 7 T magnetic field applied along the c axis causes a small but finite enhancement of the spin-order peak intensity and has no observable effect on the peak width. Inelastic neutron-scattering measurements indicate that the low-energy magnetic excitations are not affected by the field, within experimental error. In particular, the small energy gap that was recently reported is still present at low temperature in the applied field. In addition, we find that the spin-correlation length along the antiferromagnetic stripes is greater than that perpendicular to them.
C1 [Wen, Jinsheng; Xu, Zhijun; Xu, Guangyong; Tranquada, J. M.; Gu, Genda] Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA.
[Chang, S.; Kang, H. J.] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
RP Wen, JS (reprint author), Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA.
RI Tranquada, John/A-9832-2009; Wen, Jinsheng/F-4209-2010; Xu,
Guangyong/A-8707-2010; xu, zhijun/A-3264-2013
OI Tranquada, John/0000-0003-4984-8857; Wen, Jinsheng/0000-0001-5864-1466;
Xu, Guangyong/0000-0003-1441-8275; xu, zhijun/0000-0001-7486-2015
FU U. S. Department of Energy [DE-AC02-98CH10886]; National Science
Foundation [DMR-0454672]
FX The work at Brookhaven National Laboratory was supported by the U. S.
Department of Energy under Contract No. DE-AC02-98CH10886. This work
utilized facilities supported in part by the National Science Foundation
under Agreement No. DMR-0454672.
NR 20
TC 21
Z9 21
U1 0
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 DEC
PY 2008
VL 78
IS 21
AR 212506
DI 10.1103/PhysRevB.78.212506
PG 4
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400020
ER
PT J
AU Wohlfeld, K
Daghofer, M
Oles, AM
Horsch, P
AF Wohlfeld, Krzysztof
Daghofer, Maria
Oles, Andrzej M.
Horsch, Peter
TI Spectral properties of orbital polarons in Mott insulators
SO PHYSICAL REVIEW B
LA English
DT Article
DE Hubbard model; localised states; photoelectron spectra; polarons;
superexchange interactions; t-J model
ID T-J MODEL; SINGLE-PARTICLE EXCITATIONS; FALICOV-KIMBALL MODEL; QUANTUM
ANTIFERROMAGNET; HUBBARD-MODEL; PHOTOEMISSION SPECTRA; SPIN POLARONS;
SELF-ENERGY; DYNAMICS; LAMNO3
AB We address the spectral properties of Mott insulators with orbital degrees of freedom, and investigate cases where the orbital symmetry leads to Ising-type superexchange in the orbital sector. The paradigm of a hole propagating by its coupling to quantum fluctuations, known from the spin t-J model, then no longer applies. We find instead that when one of the two orbital flavors is immobile, as in the Falicov-Kimball model, trapped orbital polarons coexist with free hole propagation emerging from the effective three-site hopping in the regime of large on-site Coulomb interaction U. The spectral functions are found analytically in this case within the retraceable path approximation in one and two dimensions. On the contrary, when both of the orbitals are active, as in the model for t(2g) electrons in two dimensions, we find propagating polarons with incoherent scattering dressing the moving hole and renormalizing the quasiparticle dispersion. Here, the spectral functions, calculated using the self-consistent Born approximation, are anisotropic and depend on the orbital flavor. Unbiased conclusions concerning the spectral properties are established by comparing the above results for the orbital t-J models with those obtained using the variational cluster approximation or exact diagonalization for the corresponding Hubbard models. The present work makes predictions concerning the essential features of photoemission spectra of certain fluorides and vanadates.
C1 [Wohlfeld, Krzysztof; Daghofer, Maria; Oles, Andrzej M.; Horsch, Peter] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany.
[Wohlfeld, Krzysztof; Oles, Andrzej M.] Jagiellonian Univ, Marian Smoluchowski Inst Phys, PL-30059 Krakow, Poland.
[Daghofer, Maria] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Wohlfeld, K (reprint author), Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany.
RI Daghofer, Maria/C-5762-2008; Horsch, Peter/B-9612-2011; Wohlfeld,
Krzysztof/B-4489-2014
OI Daghofer, Maria/0000-0001-9434-8937; Wohlfeld,
Krzysztof/0000-0002-6524-8264
FU Foundation for Polish Science (FNP); Polish Ministry of Science and
Higher Education [N202 068 32/1481]; NSF [DMR-0706020]; F. Kogutowska
Foundation, Jagellonian University
FX We acknowledge financial support by the Foundation for Polish Science
(FNP), the Polish Ministry of Science and Higher Education under Project
No. N202 068 32/1481, and the NSF under Grant No. DMR-0706020. K. W.
acknowledges as well support by the F. Kogutowska Foundation of the
Jagellonian University.
NR 70
TC 30
Z9 30
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 DEC
PY 2008
VL 78
IS 21
AR 214423
DI 10.1103/PhysRevB.78.214423
PG 24
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400068
ER
PT J
AU Yi, DO
Jhon, MH
Sharp, ID
Xu, Q
Yuan, CW
Liao, CY
Ager, JW
Haller, EE
Chrzan, DC
AF Yi, D. O.
Jhon, M. H.
Sharp, I. D.
Xu, Q.
Yuan, C. W.
Liao, C. Y.
Ager, J. W., III
Haller, E. E.
Chrzan, D. C.
TI Modeling nucleation and growth of encapsulated nanocrystals: Kinetic
Monte Carlo simulations and rate theory
SO PHYSICAL REVIEW B
LA English
DT Article
DE crystal growth; island structure; Monte Carlo methods; nanostructured
materials; nucleation; SCF calculations
ID ION-BEAM SYNTHESIS; ISLAND GROWTH; MEMORY; SIO2; NANOPARTICLES;
NANOWIRES; RAMAN
AB The nucleation, growth, and early coarsening stages of three-dimensional (3D) cluster growth are modeled with an off-lattice 3D Kinetic Monte Carlo simulation and using a mean-field self-consistent solution to a set of coupled rate equations describing the process. The two approaches yield solutions that agree remarkably well, both for average properties and for the full cluster size distribution throughout the entire growth and coarsening regime. The asymptotic scaling properties of the island size distribution are shown to be similar to those expected from the analysis of Marqusee and Ross.
C1 [Yi, D. O.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Jhon, M. H.; Sharp, I. D.; Xu, Q.; Yuan, C. W.; Liao, C. Y.; Ager, J. W., III; Haller, E. E.; Chrzan, D. C.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Jhon, M. H.; Sharp, I. D.; Xu, Q.; Yuan, C. W.; Liao, C. Y.; Haller, E. E.; Chrzan, D. C.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
RP Yi, DO (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RI Sharp, Ian/I-6163-2015; Jhon, Mark/N-1500-2016;
OI Sharp, Ian/0000-0001-5238-7487; Jhon, Mark/0000-0002-9407-8452; Ager,
Joel/0000-0001-9334-9751
FU Miller Institute for Basic Research in Science; U. S. Department of
Energy [DE-AC02-05CH11231]; U. S. NSF [DMR-0109844]
FX The authors acknowledge A. Kubota and W. G. Wolfer for insightful
discussions of KMC algorithms and rate theory. D. C. C and E. E. H.
acknowledge support from the Miller Institute for Basic Research in
Science. This work was supported in part by the Director, Office of
Science, Office of Basic Energy Sciences, Division of Materials Science
and Engineering of the U. S. Department of Energy under Contract No.
DE-AC02-05CH11231 and in part by U. S. NSF under Grant No. DMR-0109844.
NR 39
TC 7
Z9 7
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 DEC
PY 2008
VL 78
IS 24
AR 245415
DI 10.1103/PhysRevB.78.245415
PG 8
WC Physics, Condensed Matter
SC Physics
GA 391PY
UT WOS:000262246400082
ER
PT J
AU Zhang, HZ
Chen, B
Banfield, JF
Waychunas, GA
AF Zhang, Hengzhong
Chen, Bin
Banfield, Jillian F.
Waychunas, Glenn A.
TI Atomic structure of nanometer-sized amorphous TiO2
SO PHYSICAL REVIEW B
LA English
DT Article
DE adsorption; bond lengths; crystallisation; Fourier transforms; molecular
dynamics method; Monte Carlo methods; nanoparticles; nanotechnology;
particle size; semiconductor materials; titanium compounds; transmission
electron microscopy; X-ray absorption spectra; X-ray scattering
ID TITANIUM-DIOXIDE NANOPARTICLES; ANATASE-TO-RUTILE; NANOCRYSTALLINE
ANATASE; PHASE-TRANSFORMATION; MOLECULAR-DYNAMICS; SURFACE; SIMULATIONS;
XAFS; CRYSTALLIZATION; TEMPERATURE
AB Amorphous titania (TiO2) is an important precursor for synthesis of single-phase nanocrystalline anatase. We synthesized amorphous titania by hydrolysis of titanium ethoxide at the ice point. Transmission electron microscopy examination and nitrogen gas adsorption indicated that the particle size of the synthesized titania is similar to 2 nm. Synchrotron wide-angle x-ray scattering (WAXS) was used to probe the atomic correlations in this amorphous sample. Atomic pair-distribution function (PDF) derived from Fourier transform of the WAXS data was used for reverse Monte Carlo (RMC) simulations of the atomic structure of the amorphous TiO2 nanoparticles. Molecular-dynamics simulations were used to generate input structures for the RMC. X-ray-absorption spectroscopy (XAS) simulations were used to screen candidate structures obtained from the RMC by comparing with experimental XAS data. The structure model that best describes both the WAXS and XAS data shows that amorphous TiO2 particles consist of a highly distorted shell and a small strained anataselike crystalline core. The average coordination number of Ti is 5.3 and most Ti-O bonds are populated around 1.940 A. Relative to bulk TiO2, the reduction in the coordination number is primarily due to the truncation of the Ti-O octahedra at the amorphous nanoparticle surface and the shortening of the Ti-O bond length to the bond contraction in the distorted shell. The pre-existence of the anataselike core may be critical to the formation of single-phase nanocrystalline anatase in crystallization of amorphous TiO2 upon heating.
C1 [Zhang, Hengzhong; Chen, Bin; Banfield, Jillian F.] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
[Waychunas, Glenn A.] Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Zhang, HZ (reprint author), Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
EM heng@eps.berkeley.edu
FU U. S. Department of Energy [DE-FG03-01ER15218]; National Science
Foundation [EAR-0123967]
FX Synchrotron experiments were performed at beamlines 11-ID-C (WAXS),
20-BM-B (XAS), and 5-BM-D (XAS), Advanced Photon Source, Argonne
National Laboratory. We thank R. Yen, Q. Ma, and M. Balasubramanian for
assistance in the beamline experiments. Computations were carried out in
the Geochemistry Computer Cluster, Lawrence Berkeley National
Laboratory. Y. Joly is thanked for help in using the FDMNES program.
Financial support was provided by the U. S. Department of Energy (Grant
No. DE-FG03-01ER15218) and the National Science Foundation (Grant No.
EAR-0123967).
NR 30
TC 81
Z9 83
U1 9
U2 103
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 DEC
PY 2008
VL 78
IS 21
AR 214106
DI 10.1103/PhysRevB.78.214106
PG 12
WC Physics, Condensed Matter
SC Physics
GA 391PE
UT WOS:000262244400029
ER
PT J
AU Zhang, LM
Li, ZQ
Basov, DN
Fogler, MM
Hao, Z
Martin, MC
AF Zhang, L. M.
Li, Z. Q.
Basov, D. N.
Fogler, M. M.
Hao, Z.
Martin, M. C.
TI Determination of the electronic structure of bilayer graphene from
infrared spectroscopy
SO PHYSICAL REVIEW B
LA English
DT Article
DE carbon; electronic structure; infrared spectra; nanostructured
materials; reflection; tunnelling
ID INTERCALATION COMPOUNDS; BAND-STRUCTURE; GRAPHITE; CONDUCTIVITY;
DEPENDENCE; BINDING; FIELD
AB We present an experimental study of the infrared conductivity, transmission, and reflection of a gated bilayer graphene and their theoretical analysis within the Slonczewski-Weiss-McClure (SWMc) model. The infrared response is shown to be governed by the interplay of the interband and the intraband transitions among the four bands of the bilayer. The position of the main conductivity peak at the charge-neutrality point is determined by the interlayer tunneling frequency. The shift of this peak as a function of the gate voltage gives information about less known parameters of the SWMc model such as those responsible for the electron-hole and sublattice asymmetries. These parameter values are shown to be consistent with recent electronic structure calculations for the bilayer graphene and the SWMc parameters commonly used for the bulk graphite.
C1 [Zhang, L. M.; Li, Z. Q.; Basov, D. N.; Fogler, M. M.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Hao, Z.; Martin, M. C.] Lawrence Berkeley Natl Lab, Adv Light Source Div, Berkeley, CA 94720 USA.
RP Zhang, LM (reprint author), Univ Calif San Diego, 9500 Gilman Dr, La Jolla, CA 92093 USA.
RI Hao, Zhao/G-2391-2015
OI Hao, Zhao/0000-0003-0677-8529
NR 54
TC 176
Z9 178
U1 5
U2 46
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 DEC
PY 2008
VL 78
IS 23
AR 235408
DI 10.1103/PhysRevB.78.235408
PG 11
WC Physics, Condensed Matter
SC Physics
GA 391PO
UT WOS:000262245400094
ER
PT J
AU Zhang, Y
Mascarenhas, A
Wang, LW
AF Zhang, Yong
Mascarenhas, A.
Wang, L. -W.
TI Interplay of alloying and ordering on the electronic structure of
GaxIn1-xP alloys
SO PHYSICAL REVIEW B
LA English
DT Article
DE copper alloys; critical points; electronic structure; energy gap;
gallium compounds; III-V semiconductors; indium compounds; platinum
alloys; pseudopotential methods
ID CONDUCTION-BAND STRUCTURE; SEMICONDUCTOR ALLOYS; OPTICAL-TRANSITIONS;
QUANTUM DOTS; ENERGY; STRAIN; SUPERLATTICES; DEPENDENCE; CRYSTALS; GAINP
AB In this work, we extend the study of the electronic structure of disordered and ordered GaxIn1-xP alloys from the focus of most previous effort, x similar to 0.5, to the whole composition range, 0 < x < 1, using an improved empirical pseudopotential method with a supercell approach that employs a sufficiently large supercell size of similar to 28 000 atoms-a size needed to realistically model disordered and partially ordered alloys. This study provides insights into the underlying physics of the alloy system in two important phases-disordered and CuPt ordered-and the interplay of alloying and ordering effects. It also offers much-needed guidance for the optimal use of ordering phenomenon in a range of applications including telecommunications, photovoltaics, and solid-state lighting. Critical-point energies, interband transition matrix elements, and optical anisotropy are calculated for both the disordered and ordered phases. The deviation of the wave function of an alloy state from that of a virtual-crystal state is analyzed using a spectral function. The implications of such deviation are examined explicitly for the above-mentioned properties. Unusual ordering effects are revealed in the indirect-band-gap composition region of the alloy. The connection and distinction between the ordered and disordered structures are discussed. An often-used perturbation theory, known as "a quasicubic model," is found to be reasonably accurate for predicting the anisotropy of the interband transition but inadequate for predicting the intensity variation with varying order parameter.
C1 [Zhang, Yong] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Wang, L. -W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Zhang, Y (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM yong_zhang@nrel.gov
FU DOE-OS-BES [DE-AC36-99GO10337]; NREL [DEAC0205CH11231]
FX This work was supported by the DOE-OS-BES under Contracts No.
DE-AC36-99GO10337 to NREL and No. DEAC0205CH11231 to LBNL. The work used
the computational resources of NERSC at LBNL. We thank Suhuai Wei for
useful discussions.
NR 44
TC 6
Z9 6
U1 1
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 DEC
PY 2008
VL 78
IS 23
AR 235202
DI 10.1103/PhysRevB.78.235202
PG 8
WC Physics, Condensed Matter
SC Physics
GA 391PO
UT WOS:000262245400056
ER
PT J
AU Zhou, XW
Doty, FP
AF Zhou, X. W.
Doty, F. P.
TI Embedded-ion method: An analytical energy-conserving charge-transfer
interatomic potential and its application to the La-Br system
SO PHYSICAL REVIEW B
LA English
DT Article
DE charge transfer states; crystal structure; lanthanum compounds;
molecular dynamics method; potential energy functions; stoichiometry
ID MOLECULAR-DYNAMICS SIMULATIONS; BOND-ORDER POTENTIALS; ATOM-METHOD;
MULTICOMPONENT SYSTEMS; ATOMISTIC SIMULATION; COMPUTER-SIMULATION;
DEFECT STRUCTURE; ELECTRON-GAS; OXIDES; SURFACE
AB Molecular-dynamics simulations of ionically bonded material systems with nonstoichiometric composition, interfaces or surfaces, defects, or other local environments that are substantially different from a stoichiometric bulk require the use of a variable charge interatomic potential. In conventional variable charge molecular-dynamics simulations, the charges on atoms are solved by minimizing the system potential energy with respect to charges. The reduced potential energy during this energy minimization process is not accounted for in the force calculation and therefore does not contribute to a corresponding increase in the kinetic energies of atoms. As a result, the total system energy decays over time. This energy nonconserving behavior precludes the method from being used to study problems such as thermal transport and thermal diffusion. It may also lead to inaccurate results for other types of simulations. Here we attempt to overcome this problem by analytically incorporating variable charge concepts into an embedded-ion method, which has mathematical format similar to the well-known embedded-atom method. We illustrate the approach using the La-Br system.
C1 [Zhou, X. W.] Sandia Natl Labs, Dept Mech Mat, Livermore, CA 94550 USA.
[Doty, F. P.] Sandia Natl Labs, Dept Mat Engn, Livermore, CA 94550 USA.
RP Zhou, XW (reprint author), Sandia Natl Labs, Dept Mech Mat, Livermore, CA 94550 USA.
EM xzhou@sandia.gov
FU Sandia Corporation, a Lockheed Martin Corporation; National Nuclear
Security Administration; United States Department of Energy
[DEAC04-94AL85000]; U. S. Department of Energy
FX Sandia is a multiprogram laboratory operated by Sandia Corporation, a
Lockheed Martin Corporation, for the National Nuclear Security
Administration of the United States Department of Energy under Contract
No. DEAC04-94AL85000. This project was sponsored by the U. S. Department
of Energy, NA22 Advanced Materials.
NR 68
TC 15
Z9 16
U1 0
U2 12
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD DEC
PY 2008
VL 78
IS 22
AR 224307
DI 10.1103/PhysRevB.78.224307
PG 12
WC Physics, Condensed Matter
SC Physics
GA 391PM
UT WOS:000262245200046
ER
PT J
AU Adamova, D
Agakichiev, G
Andronic, A
Antonczyk, D
Appelshauser, H
Belaga, V
Bielcikova, J
Braun-Munzinger, P
Busch, O
Cherlin, A
Damjanovic, S
Dietel, T
Dietrich, L
Drees, A
Dubitzky, W
Esumi, SI
Filimonov, K
Fomenko, K
Fraenkel, Z
Garabatos, C
Glassel, P
Hering, G
Holeczek, J
Kalisky, M
Kniege, S
Kushpil, V
Maas, A
Marin, A
Milosevic, J
Miskowiec, D
Ortega, R
Panebrattsev, Y
Petchenova, O
Petracek, V
Ploskon, M
Radomski, S
Rak, J
Ravinovich, I
Rehak, P
Sako, H
Schmitz, W
Schuchmann, S
Schukraft, J
Sedykh, S
Shimansky, S
Soualah, R
Stachel, J
Sumbera, M
Tilsner, H
Tserruya, I
Tsiledakis, G
Wessels, JP
Wienold, T
Wurm, JP
Yurevich, S
Yurevich, V
AF Adamova, D.
Agakichiev, G.
Andronic, A.
Antonczyk, D.
Appelshaeuser, H.
Belaga, V.
Bielcikova, J.
Braun-Munzinger, P.
Busch, O.
Cherlin, A.
Damjanovic, S.
Dietel, T.
Dietrich, L.
Drees, A.
Dubitzky, W.
Esumi, S. I.
Filimonov, K.
Fomenko, K.
Fraenkel, Z.
Garabatos, C.
Glaessel, P.
Hering, G.
Holeczek, J.
Kalisky, M.
Kniege, S.
Kushpil, V.
Maas, A.
Marin, A.
Milosevic, J.
Miskowiec, D.
Ortega, R.
Panebrattsev, Y.
Petchenova, O.
Petracek, V.
Ploskon, M.
Radomski, S.
Rak, J.
Ravinovich, I.
Rehak, P.
Sako, H.
Schmitz, W.
Schuchmann, S.
Schukraft, J.
Sedykh, S.
Shimansky, S.
Soualah, R.
Stachel, J.
Sumbera, M.
Tilsner, H.
Tserruya, I.
Tsiledakis, G.
Wessels, J. P.
Wienold, T.
Wurm, J. P.
Yurevich, S.
Yurevich, V.
TI Azimuthal dependence of pion source radii in Pb plus Au collisions at
158A GeV/c
SO PHYSICAL REVIEW C
LA English
DT Article
ID RELATIVISTIC NUCLEAR COLLISIONS; ANISOTROPIC TRANSVERSE FLOW; HEAVY-ION
COLLISIONS; INTERFEROMETRY; HYDRODYNAMICS; PLASMA; SPS
AB We present results of a two-pion correlation analysis performed with the Pb+Au collision data collected by the upgraded CERES experiment in the fall of 2000. The analysis was done in bins of the reaction centrality and the pion azimuthal emission angle with respect to the reaction plane. The pion source, deduced from the data, is slightly elongated in the direction perpendicular to the reaction plane, similarly as was observed at the Brookhaven National Laboratory Alternating Gradient Synchrotron and Relativistic Heavy Ion Collider.
C1 [Adamova, D.; Kushpil, V.; Sumbera, M.] Acad Sci Czech Republic, Inst Nucl Phys, CZ-25068 Rez, Czech Republic.
[Agakichiev, G.; Belaga, V.; Fomenko, K.; Panebrattsev, Y.; Petchenova, O.; Shimansky, S.; Yurevich, V.] Joint Inst Nucl Res, RU-141980 Dubna, Russia.
[Andronic, A.; Braun-Munzinger, P.; Garabatos, C.; Hering, G.; Holeczek, J.; Maas, A.; Marin, A.; Miskowiec, D.; Rak, J.; Sako, H.; Sedykh, S.; Tsiledakis, G.; Yurevich, S.] Schwerionenforsch GmbH, GSI Helmholtzzentrum, D-64291 Darmstadt, Germany.
[Antonczyk, D.; Appelshaeuser, H.; Kniege, S.; Ploskon, M.; Schuchmann, S.] Goethe Univ Frankfurt, Inst Kernphys, D-60438 Frankfurt, Germany.
[Bielcikova, J.; Wurm, J. P.] Max Planck Inst Nucl Phys, D-69117 Heidelberg, Germany.
[Bielcikova, J.; Busch, O.; Damjanovic, S.; Dietrich, L.; Dubitzky, W.; Esumi, S. I.; Filimonov, K.; Glaessel, P.; Milosevic, J.; Ortega, R.; Petracek, V.; Radomski, S.; Schmitz, W.; Soualah, R.; Stachel, J.; Tilsner, H.; Wienold, T.] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany.
[Cherlin, A.; Fraenkel, Z.; Ravinovich, I.; Tserruya, I.] Weizmann Inst Sci, IL-76100 Rehovot, Israel.
[Dietel, T.; Kalisky, M.; Wessels, J. P.] Univ Munster, D-48149 Munster, Germany.
[Drees, A.] SUNY Stony Brook, Stony Brook, NY 11794 USA.
[Rehak, P.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Schukraft, J.] CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland.
RP Adamova, D (reprint author), Acad Sci Czech Republic, Inst Nucl Phys, CZ-25068 Rez, Czech Republic.
RI Sumbera, Michal/O-7497-2014; Adamova, Dagmar/G-9789-2014
OI Sumbera, Michal/0000-0002-0639-7323;
NR 28
TC 15
Z9 15
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 DEC
PY 2008
VL 78
IS 6
AR 064901
DI 10.1103/PhysRevC.78.064901
PG 6
WC Physics, Nuclear
SC Physics
GA 391QP
UT WOS:000262248100045
ER
PT J
AU Andersen, JU
Chevallier, J
Forster, JS
Karamian, SA
Vane, CR
Beene, JR
Galindo-Uribarri, A
del Campo, JG
Gross, CJ
Krause, HF
Padilla-Rodal, E
Radford, D
Shapira, D
Broude, C
Malaguti, F
Uguzzoni, A
AF Andersen, J. U.
Chevallier, J.
Forster, J. S.
Karamian, S. A.
Vane, C. R.
Beene, J. R.
Galindo-Uribarri, A.
del Campo, J. Gomez
Gross, C. J.
Krause, H. F.
Padilla-Rodal, E.
Radford, D.
Shapira, D.
Broude, C.
Malaguti, F.
Uguzzoni, A.
TI Attosecond time delays in heavy-ion induced fission measured by crystal
blocking
SO PHYSICAL REVIEW C
LA English
DT Article
ID ONE-BODY DISSIPATION; NUCLEAR-FISSION; FUSION-FISSION; RESTRICTED
EQUILIBRIUM; EXCITATION-ENERGY; QUASI-FISSION; MONTE-CARLO; PHASE-SPACE;
DECAY TIMES; DYNAMICS
AB The time delays in fission induced by bombardment of W with 180 MeV (32)S, 240-255 MeV (48)Ti, 330-375 MeV (58)Ni, and 390 MeV (74)Ge have been measured by observation of crystal blocking. Nearly all results are consistent with exponential decay with lifetimes of order 10(-18) s which depend weakly on the atomic number of the composite nucleus. This is inconsistent with the Bohr-Wheeler model of fission from a compound nucleus in statistical equilibrium at each stage in a neutron evaporation cascade and supports a picture of strongly damped quasifission. A simple diffusion model with one-body dissipation reproduces roughly the observed time scale and the exponential decay. It suggests that the outer fission barrier could play a significant role in the observed, very slow decays.
C1 [Andersen, J. U.; Chevallier, J.] Univ Aarhus, Dept Phys, DK-8000 Aarhus C, Denmark.
[Forster, J. S.] Univ Montreal, Dept Phys, Montreal, PQ H3C 3J7, Canada.
[Karamian, S. A.] Joint Inst Nucl Res, FLNR, RU-141980 Dubna, Russia.
[Vane, C. R.; Beene, J. R.; Galindo-Uribarri, A.; del Campo, J. Gomez; Gross, C. J.; Krause, H. F.; Padilla-Rodal, E.; Radford, D.; Shapira, D.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Broude, C.] Weizmann Inst Sci, Dept Phys, IL-76100 Rehovot, Israel.
[Malaguti, F.; Uguzzoni, A.] Univ Bologna, Dept Phys, I-40126 Bologna, Italy.
[Malaguti, F.; Uguzzoni, A.] Ist Nazl Fis Nucl, I-40126 Bologna, Italy.
RP Andersen, JU (reprint author), Univ Aarhus, Dept Phys, DK-8000 Aarhus C, Denmark.
RI radford, David/A-3928-2015
FU NATO [CLG980118]; US Department of Energy [DEAC05000R22725]; UT-Batelle,
LLC
FX We thank the HRIBF operations staff for providing the high quality,
stable beams required for these experiments. We are grateful to W. J.
Swiatecki for his continued interest in our results and for sharing with
us his deep insight into the dynamics of heavy nuclei. Support by NATO
Grant No. CLG980118 has been crucial for bringing together the
international research group for experiments and data analysis. Research
at the Oak Ridge National Laboratory was supported by the US Department
of Energy under Contract No. DEAC05000R22725 with UT-Batelle, LLC.
NR 47
TC 27
Z9 27
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 DEC
PY 2008
VL 78
IS 6
AR 064609
DI 10.1103/PhysRevC.78.064609
PG 17
WC Physics, Nuclear
SC Physics
GA 391QP
UT WOS:000262248100035
ER
PT J
AU Bertolli, MG
Papenbrock, T
AF Bertolli, Michael G.
Papenbrock, Thomas
TI Energy functional for the three-level Lipkin model
SO PHYSICAL REVIEW C
LA English
DT Article
ID HARTREE-FOCK CALCULATIONS; SKYRMES INTERACTION; MASS FORMULAS; DENSITY;
NUCLEI; FERMIONS
AB We compute the energy functional of a three-level Lipkin model via a Legrendre transform and compare exact numerical results with analytical solutions obtained from the random phase approximation (RPA). Except for the region of the phase transition, the RPA solutions perform very well. We also study the case of three nondegenerate levels and again find that the RPA solution agrees well with the exact numerical result. For this case, the analytical results give us insight into the form of the energy functional in the presence of symmetry-breaking one-body potentials.
C1 [Bertolli, Michael G.; Papenbrock, Thomas] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Papenbrock, Thomas] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RP Bertolli, MG (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
OI Papenbrock, Thomas/0000-0001-8733-2849
FU U.S. Department of Energy [DE-FG02-96ER40963, DE-FG02-07ER41529,
DE-AC05-00OR22725]
FX This research was supported in part by the U.S. Department of Energy
under Contract Nos. DE-FG02-96ER40963, DE-FG02-07ER41529 (University of
Tennessee), and DE-AC05-00OR22725 with UT-Battelle, LLC (Oak Ridge
National Laboratory).
NR 34
TC 6
Z9 6
U1 1
U2 4
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 DEC
PY 2008
VL 78
IS 6
AR 064310
DI 10.1103/PhysRevC.78.064310
PG 7
WC Physics, Nuclear
SC Physics
GA 391QP
UT WOS:000262248100018
ER
PT J
AU Goldblum, BL
Prussin, SG
Agvaanluvsan, U
Bernstein, LA
Bleuel, DL
Younes, W
Guttormsen, M
AF Goldblum, B. L.
Prussin, S. G.
Agvaanluvsan, U.
Bernstein, L. A.
Bleuel, D. L.
Younes, W.
Guttormsen, M.
TI Determination of (n, gamma) cross sections in the rare-earth region
using the surrogate ratio method
SO PHYSICAL REVIEW C
LA English
DT Article
ID LEVEL DENSITY; DECAY
AB The surrogate ratio method was used to convert experimentally determined relative gamma-decay probabilities for excited (171)Yb and (161)Dy nuclei, populated using ((3)He, (3)He') and ((3)He, alpha) reactions, into neutron-induced gamma-decay cross sections in an equivalent neutron energy range of 165-465 keV. The relative gamma-decay probabilities were measured using the CACTUS array at the Oslo Cyclotron Laboratory and were found to agree with the ratio of neutron-induced gamma-decay cross sections for the same compound nuclei over the range of excitation energies measured. No significant entrance-channel effects on the extracted (n, gamma) cross sections were observed. The cross sections obtained using the surrogate ratio method were compared to directly measured neutron-capture cross sections and found to agree within the total estimated uncertainty over the range of equivalent neutron energies measured.
C1 [Goldblum, B. L.; Prussin, S. G.] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA.
[Agvaanluvsan, U.; Bernstein, L. A.; Bleuel, D. L.; Younes, W.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Guttormsen, M.] 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 National Science Foundation; Department of Homeland Security; US
Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]; Norwegian Research Council (NFR)
FX We acknowledge the fruitful discussions and advice of L. G. Moretto and
E. B. Norman and thank the Oslo Cyclotron Laboratory operations and
facilities staff for their help in performing these experiments. This
work was supported by a grant by the National Science Foundation and the
Department of Homeland Security and 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) is
gratefully acknowledged.
NR 22
TC 13
Z9 14
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 DEC
PY 2008
VL 78
IS 6
AR 064606
DI 10.1103/PhysRevC.78.064606
PG 6
WC Physics, Nuclear
SC Physics
GA 391QP
UT WOS:000262248100032
ER
PT J
AU Kulagin, SA
Melnitchouk, W
AF Kulagin, S. A.
Melnitchouk, W.
TI Spin structure functions of He-3 at finite Q(2)
SO PHYSICAL REVIEW C
LA English
DT Article
ID DEEP-INELASTIC-SCATTERING; 3-NUCLEON BOUND-STATES; DEUTERON
STRUCTURE-FUNCTION; NUCLEAR-STRUCTURE FUNCTIONS; STRUCTURE FUNCTIONS
F2N; POLARIZED HE-3; ELECTRON-SCATTERING; NEUTRON; TARGETS; PROTON
AB Using recently derived relations between spin-dependent nuclear and nucleon g(1) and g(2) structure functions at finite Q(2), we study nuclear effects in He-3 in the nucleon resonance and deep inelastic regions. Comparing the finite-Q(2) results with the standard convolution formulas obtained in the large-Q(2) limit, we find significant broadening of the effective nucleon momentum distribution functions, leading to additional suppression of the nuclear g(1) and g(2) structure functions around the resonance peaks.
C1 [Kulagin, S. A.] Russian Acad Sci, Inst Nucl Res, RU-117312 Moscow, Russia.
[Melnitchouk, W.] Jefferson Lab, Newport News, VA 23606 USA.
RP Kulagin, SA (reprint author), Russian Acad Sci, Inst Nucl Res, RU-117312 Moscow, Russia.
NR 49
TC 14
Z9 14
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 DEC
PY 2008
VL 78
IS 6
AR 065203
DI 10.1103/PhysRevC.78.065203
PG 15
WC Physics, Nuclear
SC Physics
GA 391QP
UT WOS:000262248100058
ER
PT J
AU Marcucci, LE
Pervin, M
Pieper, SC
Schiavilla, R
Wiringa, RB
AF Marcucci, L. E.
Pervin, Muslema
Pieper, Steven C.
Schiavilla, R.
Wiringa, R. B.
TI Quantum Monte Carlo calculations of magnetic moments and M1 transitions
in A <= 7 nuclei including meson-exchange currents
SO PHYSICAL REVIEW C
LA English
DT Article
ID FEW-BODY NUCLEI; LIGHT-NUCLEI; FORM-FACTORS; FREEDOM; CAPTURE
AB Green's function Monte Carlo calculations of magnetic moments and M1 transitions including two-body meson-exchange current (MEC) contributions are reported for A <= 7 nuclei. The realistic Argonne nu(18) two-nucleon and Illinois-2 three-nucleon potentials are used to generate the nuclear wave functions. The two-body meson-exchange operators are constructed to satisfy the continuity equation with the Argonne nu(18) potential. The MEC contributions increase the A = 3, 7 isovector magnetic moments by 16% and the A = 6, 7 M1 transition rates by 17-34%, bringing them into very good agreement with the experimental data.
C1 [Marcucci, L. E.] Univ Pisa, Dept Phys Enrico Fermi, I-56127 Pisa, Italy.
[Marcucci, L. E.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
[Pervin, Muslema; Pieper, Steven C.; Wiringa, R. B.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
[Schiavilla, R.] Jefferson Lab, Ctr Theory, Newport News, VA 23606 USA.
[Schiavilla, R.] Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
RP Marcucci, LE (reprint author), Univ Pisa, Dept Phys Enrico Fermi, I-56127 Pisa, Italy.
EM marcucci@df.unipi.it; muslema@phy.anl.gov; spieper@anl.gov;
schiavil@jlab.org; wiringa@anl.gov
RI Wiringa, Robert/M-4970-2015
FU US Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357,
DE-AC05-06OR23177]; SciDAC [DE-FC02-07ER41457]
FX Themany-body calculations were performed on the parallel computers of
the Laboratory Computing Resource Center, Argonne National Laboratory.
This work is supported by the US Department of Energy, Office of Nuclear
Physics, under Contract Nos. DE-AC02-06CH11357 ( M. P., S. C. P., and R.
B. W.) and DE-AC05-06OR23177 ( R. S.) and under SciDAC Grant No.
DE-FC02-07ER41457.
NR 39
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U1 0
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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 DEC
PY 2008
VL 78
IS 6
AR 065501
DI 10.1103/PhysRevC.78.065501
PG 10
WC Physics, Nuclear
SC Physics
GA 391QP
UT WOS:000262248100060
ER
PT J
AU Matei, C
Brune, CR
Massey, TN
AF Matei, C.
Brune, C. R.
Massey, T. N.
TI Measurements of branching ratios from the 7.12-MeV state in O-16 and the
C-12(alpha, gamma)O-16 reaction cross section
SO PHYSICAL REVIEW C
LA English
DT Article
ID STELLAR ENERGIES; C-12(ALPHA,GAMMA)O-16; NUCLEOSYNTHESIS; EFFICIENCY;
DETECTOR; C-12
AB Gamma-ray branching ratios of the 7.12-MeV state in O-16 have been measured using the gamma-gamma coincidence technique. The extrapolations of several components of the important C-12(alpha, gamma)O-16 cross section to helium-burning energies are dependent upon the 7.12 -> 6.92 MeV branching ratio. An experimental upper limit has been placed on this transition; the 7.12 -> 6.13 MeV branching ratio has also been measured. Relative cross sections and gamma-ray angular distributions have been measured for the F-19(p, a alpha gamma) reaction at several energies near E-p = 2 MeV, leading to the 6.13-, 6.92-, and 7.12-MeV states of O-16. Monte Carlo simulations of the various detectors have been developed and the simulated detector efficiencies have been compared and adjusted to experimental measurements. The available experimental data relating to the C-12(alpha, gamma)O-16 cross section have been fitted with the R-matrix formalism. The new upper limit on the 7.12. 6.92 MeV branching ratio impacts the extrapolation of both the E2 ground-state cross section and the cascade cross section through the 6.92- MeV state.
C1 [Matei, C.; Brune, C. R.; Massey, T. N.] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA.
[Matei, C.] Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA.
RP Matei, C (reprint author), Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA.
EM mateic@ornl.gov
RI Matei, Catalin/B-2586-2008
OI Matei, Catalin/0000-0002-2254-3853
FU US Department of Energy [DE-FG02-88ER40387, DE-FC03-3NA00143]
FX We would like to thank D. Carter for assistance with the electronics and
D. Jacobs for maintaining the accelerator. We also wish to thank J.
O'Donnell, M. Hornish, Y. Parpottas, A. Salas, and R. Wheeler for
assistance with the experiments. We are grateful to Lothar Buchmann for
making his Rmatrix fits available and thus allowing us to cross-check
the results of our R-matrix code. This work was supported by the US
Department of Energy, under Grant Nos. DE-FG02-88ER40387 (
OhioUniversity) and DE-FC03-3NA00143 ( Oak Ridge Associated
Universities).
NR 23
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U1 1
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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 DEC
PY 2008
VL 78
IS 6
AR 065801
DI 10.1103/PhysRevC.78.065801
PG 11
WC Physics, Nuclear
SC Physics
GA 391QP
UT WOS:000262248100061
ER
PT J
AU Pastore, S
Schiavilla, R
Goity, JL
AF Pastore, S.
Schiavilla, R.
Goity, J. L.
TI Electromagnetic two-body currents of one- and two-pion range
SO PHYSICAL REVIEW C
LA English
DT Article
ID THERMAL-NEUTRON CAPTURE; FIELD THEORY APPROACH; CHIRAL LAGRANGIANS;
NUCLEAR-FORCES; CROSS-SECTION; RADIATIVE-CAPTURE; EXCHANGE CURRENTS; LOW
ENERGIES; DEUTERIUM; HE-3
AB Nuclear electromagnetic currents are derived in time-ordered perturbation theory within an effective-field-theory framework including explicit nucleons, Delta isobars, and pions up to one loop, or next-to-next-to-next-to-leading order (N(3)LO). The currents obtained at next-to-next-to-leading order (N(2)LO), i.e., ignoring loop corrections, are used in a study of neutron radiative captures on protons and deuterons at thermal energies, and of A = 2 and 3 nuclei magnetic moments. The wave functions for A = 2 are derived from solutions of the Schrodinger equation with the Argonne nu(18) (AV18) or CD-Bonn (CDB) potentials, while those for A = 3 are obtained with the hyperspherical-harmonics-expansion method from a realistic Hamiltonian including, in addition to the AV18 or CDB two-nucleon, a three-nucleon potential. With the strengths of the Delta-excitation currents occurring at N(2)LO determined to reproduce the n-p cross section and isovector combination of the trinucleon magnetic moments, we find that the cross section and photon circular polarization parameter, measured in n-d and (n) over right arrow -d processes, are underpredicted by theory; for example, the cross section is underpredicted by 11-38% as the cutoff is increased from 500 to 800 MeV. A complete analysis of the results, in particular their large cutoff dependence, is presented.
C1 [Pastore, S.; Schiavilla, R.] Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
[Schiavilla, R.; Goity, J. L.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
[Goity, J. L.] Hampton Univ, Dept Phys, Hampton, VA 23668 USA.
RP Pastore, S (reprint author), Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
FU U.S. Department of Energy, Office of Nuclear Physics
[DE-AC05-06OR23177]; National Science Foundation [PHY-0555559]
FX We thank L. Girlanda, A. Kievsky, L. E. Marcucci, and M. Viviani for
discussions and for letting us use their trinucleon wave functions, E.
Epelbaum and S. Kolling for an interesting conversation and for sharing
with us some of their results on the same topic before publication, and
V. Cirigliano for discussions in the early phase of this work. One of
the authors ( R. S.) also thanks the Physics Department of the
University of Pisa, the INFN Pisa branch, and especially the Pisa group
for the support and warm hospitality extended to him on several
occasions. The work of R. S. is supported by the U.S. Department of
Energy, Office of Nuclear Physics, under Contract DE-AC05-06OR23177, and
that of J.L.G. by the National Science Foundation under Grant
PHY-0555559. The calculations were made possible by grants of computing
time from the National Energy Research Supercomputer Center.
NR 41
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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 DEC
PY 2008
VL 78
IS 6
AR 064002
DI 10.1103/PhysRevC.78.064002
PG 25
WC Physics, Nuclear
SC Physics
GA 391QP
UT WOS:000262248100008
ER
PT J
AU Pei, JC
Stoitsov, MV
Fann, GI
Nazarewicz, W
Schunck, N
Xu, FR
AF Pei, J. C.
Stoitsov, M. V.
Fann, G. I.
Nazarewicz, W.
Schunck, N.
Xu, F. R.
TI Deformed coordinate-space Hartree-Fock-Bogoliubov approach to weakly
bound nuclei and large deformations
SO PHYSICAL REVIEW C
LA English
DT Article
ID MEAN-FIELD CALCULATIONS; GROUND-STATE PROPERTIES; DRIP-LINE NUCLEI;
BOGOLYUBOV EQUATIONS; SKYRME; DENSITIES; HALO
AB The coordinate-space formulation of the Hartree-Fock-Bogoliubov (HFB) method enables the self-consistent treatment of mean field and pairing in weakly bound systems whose properties are affected by the particle continuum space. Of particular interest are neutron-rich, deformed drip-line nuclei, which can exhibit novel properties associated with neutron skin. To describe such systems theoretically, we developed an accurate two-dimensional lattice Skyrme-HFB solver HFB-AX based on basis (or B)-splines. Compared to previous implementations, ours incorporated a number of improvements aimed at boosting the solver's performance. These include the explicit imposition of axiality and space inversion, use of the modified Broyden method to solve self-consistent equations, and a partial parallelization of the code. HFB-AX has been compared with other HFB codes, both spherical and deformed, and the accuracy of the B-spline expansion was tested by employing the multiresolution wavelet method. Illustrative calculations are carried out for stable and weakly bound nuclei at spherical and very deformed shapes, including constrained fission pathways. In addition to providing new physics insights, HFB-AX can serve as a useful tool to assess the reliability and applicability of coordinate-space and configuration-space HFB frameworks, both existing and in development.
C1 [Pei, J. C.] Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA.
[Pei, J. C.; Stoitsov, M. V.; Nazarewicz, W.; Schunck, N.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Pei, J. C.; Stoitsov, M. V.; Fann, G. I.; Nazarewicz, W.; Schunck, N.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Stoitsov, M. V.] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria.
[Nazarewicz, W.] Warsaw Univ, Inst Theoret Phys, PL-00681 Warsaw, Poland.
[Xu, F. R.] Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China.
RP Pei, JC (reprint author), Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA.
RI Xu, Furong/K-4178-2013; Pei, Junchen/E-3532-2010;
OI Schunck, Nicolas/0000-0002-9203-6849
FU US Department of Energy [DE-FG02-96ER40963, DE-AC05-00OR22725,
DE-FG05-87ER40361, DE-FC02-07ER41457]
FX This work was supported in part by the US Department of Energy under
Contract Nos. DE-FG02-96ER40963 (University of Tennessee),
DE-AC05-00OR22725 with UT-Battelle, LLC (Oak Ridge National Laboratory),
DE-FG05-87ER40361 (Joint Institute for Heavy Ion Research), and
DE-FC02-07ER41457 with UNEDF SciDAC Collaboration. Computational
resources were provided by the National Center for Computational
Sciences at Oak Ridge and the National Energy Research Scientific
Computing Facility.
NR 41
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U1 0
U2 9
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 DEC
PY 2008
VL 78
IS 6
AR 064306
DI 10.1103/PhysRevC.78.064306
PG 12
WC Physics, Nuclear
SC Physics
GA 391QP
UT WOS:000262248100014
ER
PT J
AU Schunck, N
Egido, JL
AF Schunck, N.
Egido, J. L.
TI Nuclear halos and drip lines in symmetry-conserving continuum
Hartree-Fock-Bogoliubov theory
SO PHYSICAL REVIEW C
LA English
DT Article
ID RESONANT STATES; PAIRING CORRELATIONS; COORDINATE SPACE; WAVE-FUNCTIONS;
SYSTEMS; EXPANSIONS; SCATTERING; FORCES; MODEL
AB We review the properties of nuclear halos and nuclear skins in drip line nuclei in the framework of the spherical Hartree-Fock-Bogoliubov (HFB) theory with continuum effects and projection on a good particle number with the Gogny force. We first establish the position of the unprojected HFB drip lines for the two most employed parametrizations of the Gogny force and show that the use of finite-range interactions leads almost always to small-sized halos, even in the least bound nuclei, which is in agreement with most mean-field predictions. We also discuss the size of the neutron skin at the drip line and its relation to neutron asymmetry. The impact of particle-number projection and its conceptual consequences near the drip line are analyzed in detail. In particular, we discuss the role of chemical potential in a projected theory and the criteria required to define the drip line. We show that including particle-number projection can shift the latter, in particular near closed shells. We notice that, as a result, the size of the halo can be increased due to larger pairing correlations. However, combining the most realistic pairing interaction, a proper treatment of the continuum, and particle-number projection does not permit us to reproduce the very large halos observed in very light nuclei.
C1 [Schunck, N.; Egido, J. L.] Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain.
[Schunck, N.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Schunck, N.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RP Schunck, N (reprint author), Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain.
RI Egido, J. Luis/F-4921-2017;
OI Egido, J. Luis/0000-0002-8292-6127; Schunck, Nicolas/0000-0002-9203-6849
FU Spanish Ministerio de Educacion y Ciencia [SB2004-0024, FPA2007- 66069];
Spanish Consolider-Ingenio [CSD2007-00042]; U.S. Department of Energy
[DE-FC02-07ER41457, DE-FG02-96ER40963, DE-AC05-00OR22725]
FX N.S. acknowledges financial support of the Spanish Ministerio de
Educacion y Ciencia (Ref. SB2004-0024). This work has been supported in
part by the Spanish Ministerio de Educacion y Ciencia under Contract
FPA2007- 66069, by the Spanish Consolider-Ingenio 2010 Programme CPAN
(CSD2007-00042), as well as by the U.S. Department of Energy under
Contract Nos. DE-FC02-07ER41457 (University of Washington),
DE-FG02-96ER40963 (University of Tennessee), and DE-AC05-00OR22725 with
UT-Battelle, LLC (Oak Ridge National Laboratory).
NR 54
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U1 2
U2 6
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 DEC
PY 2008
VL 78
IS 6
AR 064305
DI 10.1103/PhysRevC.78.064305
PG 14
WC Physics, Nuclear
SC Physics
GA 391QP
UT WOS:000262248100013
ER
PT J
AU Sjue, SKL
Melconian, D
Garcia, A
Ahmad, I
Algora, A
Aysto, J
Elomaa, VV
Eronen, T
Hakala, J
Hoedl, S
Kankainen, A
Kessler, T
Moore, ID
Naab, F
Penttila, H
Rahaman, S
Saastamoinen, A
Swanson, HE
Weber, C
Triambak, S
Deryckx, K
AF Sjue, S. K. L.
Melconian, D.
Garcia, A.
Ahmad, I.
Algora, A.
Aysto, J.
Elomaa, V. -V.
Eronen, T.
Hakala, J.
Hoedl, S.
Kankainen, A.
Kessler, T.
Moore, I. D.
Naab, F.
Penttila, H.
Rahaman, S.
Saastamoinen, A.
Swanson, H. E.
Weber, C.
Triambak, S.
Deryckx, K.
TI Electron-capture branch of Tc-100 and tests of nuclear wave functions
for double-beta decays
SO PHYSICAL REVIEW C
LA English
DT Article
ID PARTICLE PHYSICS; MO-100; IGISOL; RU-100; STATES
AB We present a measurement of the electron-capture branch of Tc-100. Our value, B(EC) = (2.6 +/- 0.4) x 10(-5), implies that the Mo-100 neutrino absorption cross section to the ground state of Tc-100 is roughly 50% larger than previously thought. Disagreement between the experimental value and QRPA calculations relevant to double-beta decay matrix elements persists. We find agreement with previous measurements of the 539.5- and 590.8-keV gamma-ray intensities.
C1 [Sjue, S. K. L.; Garcia, A.; Hoedl, S.; Swanson, H. E.; Triambak, S.; Deryckx, K.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
[Melconian, D.] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA.
[Ahmad, I.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Algora, A.] Univ Valencia, Inst Fis Corpuscular, Valencia, Spain.
[Algora, A.] Hungarian Acad Sci, Inst Nucl Res, Debrecen, Hungary.
[Aysto, J.; Elomaa, V. -V.; Eronen, T.; Hakala, J.; Kankainen, A.; Kessler, T.; Moore, I. D.; Penttila, H.; Rahaman, S.; Saastamoinen, A.; Weber, C.] Univ Jyvaskyla, Dept Phys, Jyvaskyla, Finland.
[Naab, F.] Univ Michigan, Ann Arbor, MI 48109 USA.
RP Sjue, SKL (reprint author), Univ Washington, Dept Phys, Seattle, WA 98195 USA.
RI Melconian, Dan/A-1331-2011; Penttila, Heikki/A-4420-2013; Moore,
Iain/D-7255-2014; Kankainen, Anu/K-3448-2014; Algora,
Alejandro/E-2960-2015
OI Melconian, Dan/0000-0002-0142-5428; Moore, Iain/0000-0003-0934-8727;
Kankainen, Anu/0000-0003-1082-7602; Algora,
Alejandro/0000-0002-5199-1794
FU US Department of Energy [DE-F602-97ER41020, DE-AC02-06CH11357]; Academy
of Finland [202256]; Centre of Excellence programme [2006-2011]; Janos
Bolyai and Ramon y Cajal research; EC [MERG-CT-2004-506849,
MEC-FPA2005-03993]
FX We thank Jerzy Szerypo and Peter Dendooven for help in the initial
stages of this experiment. This work was partly supported by the US
Department of Energy, under contracts DE-F602-97ER41020 at the
University of Washington and DE-AC02-06CH11357 at Argonne. This work has
been supported by the Academy of Finland under project No. 202256 and
the Centre of Excellence programme 2006-2011 (Nuclear and Accelerator
Based Physics Programme at JYFL). A. A. gratefully acknowledges support
of the Janos Bolyai and Ramon y Cajal research grants, as well as
support from EC contracts MERG-CT-2004-506849 and MEC-FPA2005-03993.
NR 28
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U1 0
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 DEC
PY 2008
VL 78
IS 6
AR 064317
DI 10.1103/PhysRevC.78.064317
PG 7
WC Physics, Nuclear
SC Physics
GA 391QP
UT WOS:000262248100025
ER
PT J
AU Steer, SJ
Podolyak, Z
Pietri, S
Gorska, M
Regan, PH
Rudolph, D
Werner-Malento, E
Garnsworthy, AB
Hoischen, R
Gerl, J
Wollersheim, HJ
Maier, KH
Grawe, H
Becker, F
Bednarczyk, P
Caceres, L
Doornenbal, P
Geissel, H
Greabosz, J
Kelic, A
Kojouharov, I
Kurz, N
Montes, F
Prokopowicz, W
Saito, T
Schaffner, H
Tashenov, S
Heinz, A
Pfutzner, M
Kurtukian-Nieto, T
Benzoni, G
Jungclaus, A
Balabanski, DL
Brandau, C
Brown, BA
Bruce, AM
Catford, WN
Cullen, IJ
Dombradi, Z
Estevez, ME
Gelletly, W
Ilie, G
Jolie, J
Jones, GA
Kmiecik, M
Kondev, FG
Krucken, R
Lalkovski, S
Liu, Z
Maj, A
Myalski, S
Schwertel, S
Shizuma, T
Walker, PM
Wieland, O
AF Steer, S. J.
Podolyak, Zs.
Pietri, S.
Gorska, M.
Regan, P. H.
Rudolph, D.
Werner-Malento, E.
Garnsworthy, A. B.
Hoischen, R.
Gerl, J.
Wollersheim, H. J.
Maier, K. H.
Grawe, H.
Becker, F.
Bednarczyk, P.
Caceres, L.
Doornenbal, P.
Geissel, H.
Greabosz, J.
Kelic, A.
Kojouharov, I.
Kurz, N.
Montes, F.
Prokopowicz, W.
Saito, T.
Schaffner, H.
Tashenov, S.
Heinz, A.
Pfuetzner, M.
Kurtukian-Nieto, T.
Benzoni, G.
Jungclaus, A.
Balabanski, D. L.
Brandau, C.
Brown, B. A.
Bruce, A. M.
Catford, W. N.
Cullen, I. J.
Dombradi, Zs.
Estevez, M. E.
Gelletly, W.
Ilie, G.
Jolie, J.
Jones, G. A.
Kmiecik, M.
Kondev, F. G.
Kruecken, R.
Lalkovski, S.
Liu, Z.
Maj, A.
Myalski, S.
Schwertel, S.
Shizuma, T.
Walker, P. M.
Wieland, O.
TI Single-particle behavior at N=126: Isomeric decays in neutron-rich
Pt-204
SO PHYSICAL REVIEW C
LA English
DT Article
ID RELATIVISTIC HEAVY-IONS; FRAGMENTATION; PROTON; ISOTOPES; PB-208;
STATES; SPECTROSCOPY; NUCLEI; HG-206; LEVEL
AB The four proton-hole nucleus Pt-204 was populated in the fragmentation of an E/A = 1 GeV Pb-208 beam. The yrast structure of Pt-204 has been observed up to angular momentum I = 10h by detecting delayed gamma-ray transitions originating from metastable states. These long-lived excited states have been identified to have spin-parities of I-pi = (10(+)), (7(-)), and (5(-)) and half-lives of T-1/2 = 146(14) ns, 55(3) mu s, and 5.5(7) mu s, respectively. The structure of the magic N = 126 Pt-204 nucleus is discussed and understood in terms of the spherical shell model. The data suggest a revision of the two-body interaction for N = 126, Z < 82, which determines the evolution of nuclear structure toward the r-process waiting point nuclei.
C1 [Steer, S. J.; Podolyak, Zs.; Pietri, S.; Regan, P. H.; Garnsworthy, A. B.; Brandau, C.; Bruce, A. M.; Catford, W. N.; Cullen, I. J.; Gelletly, W.; Jones, G. A.; Liu, Z.; Shizuma, T.; Walker, P. M.] Univ Surrey, Guildford GU2 7XH, Surrey, England.
[Gorska, M.; Werner-Malento, E.; Gerl, J.; Wollersheim, H. J.; Grawe, H.; Becker, F.; Bednarczyk, P.; Caceres, L.; Doornenbal, P.; Geissel, H.; Greabosz, J.; Kelic, A.; Kojouharov, I.; Kurz, N.; Montes, F.; Prokopowicz, W.; Saito, T.; Schaffner, H.; Tashenov, S.] GSI, D-64291 Darmstadt, Germany.
[Rudolph, D.; Hoischen, R.] Lund Univ, Dept Phys, S-22100 Lund, Sweden.
[Garnsworthy, A. B.; Heinz, A.] Yale Univ, WNSL, New Haven, CT 06520 USA.
[Maier, K. H.] Univ W Scotland, Paisley PA1 2BE, Renfrew, Scotland.
[Maier, K. H.; Bednarczyk, P.; Greabosz, J.; Kmiecik, M.; Maj, A.; Myalski, S.] Inst Nucl Phys, PL-31342 Krakow, Poland.
[Caceres, L.; Jungclaus, A.] Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain.
[Doornenbal, P.; Ilie, G.; Jolie, J.] Univ Cologne, IKP, D-50937 Cologne, Germany.
[Pfuetzner, M.] Warsaw Univ, IEP, PL-00681 Warsaw, Poland.
[Kurtukian-Nieto, T.] Univ Santiago de Compostela, Santiago De Compostela, Spain.
[Benzoni, G.; Wieland, O.] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy.
[Balabanski, D. L.] Bulgarian Acad Sci, INRNE, BG-1784 Sofia, Bulgaria.
[Balabanski, D. L.] Univ Camerino, Dipartimento Fis, I-62032 Camerino, Italy.
[Brown, B. A.] Michigan State Univ, NSCL, E Lansing, MI 48824 USA.
[Dombradi, Zs.] Inst Nucl Res, H-4001 Debrecen, Hungary.
[Estevez, M. E.] Inst Fis Corpuscular, Valencia, Spain.
[Ilie, G.] Natl Inst Phys & Nucl Engn, Bucharest, Romania.
[Kondev, F. G.] Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA.
[Kruecken, R.; Schwertel, S.] Tech Univ Munich, Phys Dept E12, D-8046 Garching, Germany.
[Lalkovski, S.] Sofia Univ St Kliment Ohridski, Fac Phys, Sofia, Bulgaria.
[Shizuma, T.] Japan Atom Energy Res Inst, Kizu, Kyoto 6190215, Japan.
[Bruce, A. M.; Lalkovski, S.] Univ Brighton, Sch Engn, Brighton BN2 4GJ, E Sussex, England.
RP Steer, SJ (reprint author), Univ Surrey, Guildford GU2 7XH, Surrey, England.
EM s.steer@surrey.ac.uk
RI Rudolph, Dirk/D-4259-2009; Gerl, Juergen/A-3255-2011; Wieland,
Oliver/G-1784-2011; Dombradi, Zsolt/B-3743-2012; Heinz,
Andreas/E-3191-2014; Kurtukian-Nieto, Teresa/J-1707-2014; Bruce,
Alison/K-7663-2016; Kruecken, Reiner/A-1640-2013
OI Rudolph, Dirk/0000-0003-1199-3055; Kurtukian-Nieto,
Teresa/0000-0002-0028-0220; Bruce, Alison/0000-0003-2871-0517; Kruecken,
Reiner/0000-0002-2755-8042
FU EPSRC (UK); AWE plc. (UK); EU [506065]; The Swedish Research Council;
The Polish Ministry of Science and Higher Education; The Bulgarian
Science Fund; The US Department of Energy; The Spanish Ministeriode
Educacion y Ciencia; The German BMBF; The Hungarian Science Foundation;
Italian INFN
FX The excellent work of the GSI accelerator staff is acknowledged. This
work is supported by the EPSRC (UK) and AWE plc. (UK), the EU Access to
Large Scale Facilities Programme (EURONS, EU Contract 506065), The
Swedish Research Council, The Polish Ministry of Science and Higher
Education, The Bulgarian Science Fund, The US Department of Energy, The
Spanish Ministeriode Educacion y Ciencia, The German BMBF, The Hungarian
Science Foundation, and the Italian INFN.
NR 30
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SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD DEC
PY 2008
VL 78
IS 6
AR 061302
DI 10.1103/PhysRevC.78.061302
PG 5
WC Physics, Nuclear
SC Physics
GA 391QP
UT WOS:000262248100002
ER
PT J
AU Toshito, T
Kodama, K
Sihver, L
Yusa, K
Ozaki, M
Amako, K
Kameoka, S
Murakami, K
Sasaki, T
Aoki, S
Ban, T
Fukuda, T
Kubota, H
Naganawa, N
Nakamura, T
Nakano, T
Natsume, M
Niwa, K
Takahashi, S
Yoshida, J
Yoshida, H
Kanazawa, M
Kanematsu, N
Komori, M
Sato, S
Asai, M
Koi, T
Fukushima, C
Ogawa, S
Shibasaki, M
Shibuya, H
AF Toshito, T.
Kodama, K.
Sihver, L.
Yusa, K.
Ozaki, M.
Amako, K.
Kameoka, S.
Murakami, K.
Sasaki, T.
Aoki, S.
Ban, T.
Fukuda, T.
Kubota, H.
Naganawa, N.
Nakamura, T.
Nakano, T.
Natsume, M.
Niwa, K.
Takahashi, S.
Yoshida, J.
Yoshida, H.
Kanazawa, M.
Kanematsu, N.
Komori, M.
Sato, S.
Asai, M.
Koi, T.
Fukushima, C.
Ogawa, S.
Shibasaki, M.
Shibuya, H.
TI Measurements of projectile-like Be-8 and B-9 production in 200-400
MeV/nucleon C-12 on water
SO PHYSICAL REVIEW C
LA English
DT Article
ID PARTICLE-PARTICLE CORRELATIONS; RELATIVISTIC NUCLEI; CROSS-SECTIONS;
FRAGMENTATION; EMULSION; SYSTEM; EMISSION
AB We have studied the production of the projectile-like fragments Be-8 and B-9 produced in interactions of 200 to 400 MeV/nucleon carbon ions with water, using emulsion detectors. In this Brief Report we present the first published production cross section of the projectile-like fragment B-9 in the energy region above 100 MeV/nucleon. The measured production cross sections of these nuclides were compared to calculations using a semiempirical model. We found that the measured cross sections deviate from the calculated values by a factor up to about six. This information is of importance for benchmarking and improving heavy ion nuclear reaction models.
C1 [Toshito, T.] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan.
[Toshito, T.; Amako, K.; Kameoka, S.; Murakami, K.; Sasaki, T.] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan.
[Kodama, K.] Aichi Univ Educ, Kariya, Aichi 4488542, Japan.
[Sihver, L.] Chalmers, SE-41296 Gothenburg, Sweden.
[Yusa, K.] Gunma Univ, Maebashi, Gumma 3718510, Japan.
[Ozaki, M.] JAXA, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan.
[Aoki, S.] Kobe Univ, Kobe, Hyogo 6578501, Japan.
[Ban, T.; Fukuda, T.; Kubota, H.; Naganawa, N.; Nakamura, T.; Nakano, T.; Natsume, M.; Niwa, K.; Takahashi, S.; Yoshida, J.] Nagoya Univ, Nagoya, Aichi 4648602, Japan.
[Yoshida, H.] Naruto Univ Educ, Naruto 7728502, Japan.
[Kanazawa, M.; Kanematsu, N.; Komori, M.; Sato, S.] NIRS, Chiba 2638555, Japan.
[Asai, M.; Koi, T.] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
[Fukushima, C.; Ogawa, S.; Shibasaki, M.; Shibuya, H.] Toho Univ, Funabashi, Chiba 2748510, Japan.
[Sihver, L.] Roanoke Coll, Salem, VA 24153 USA.
RP Toshito, T (reprint author), Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan.
RI Kanematsu, Nobuyuki/B-9130-2008; Ozaki, Masanobu/K-1165-2013; Komori,
Masataka/I-6259-2014; Aoki, Shigeki/L-6044-2015
OI Kanematsu, Nobuyuki/0000-0002-2534-9933; Komori,
Masataka/0000-0002-4545-4917;
FU CREST of the Japan Science and Technology Agency (JST)
FX The authors thank Dr. Nakahiro Yasuda of NIRS for useful suggestions and
Dr. Dennis Wright of SLAC for careful reading of the manuscript. This
research was performed as a Research Project with Heavy Ions at
NIRS-HIMAC. This work was also supported in part by CREST of the Japan
Science and Technology Agency (JST).
NR 21
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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 DEC
PY 2008
VL 78
IS 6
AR 067602
DI 10.1103/PhysRevC.78.067602
PG 4
WC Physics, Nuclear
SC Physics
GA 391QP
UT WOS:000262248100068
ER
PT J
AU Wienke, H
Capote, R
Herman, M
Sin, M
AF Wienke, H.
Capote, R.
Herman, M.
Sin, M.
TI Deformation-dependent Tamura-Udagawa-Lenske multistep direct model
SO PHYSICAL REVIEW C
LA English
DT Article
ID EMISSION CROSS-SECTIONS; CONTINUUM QRPA; WAVE-FUNCTIONS; SCATTERING;
ENDF/B-VII.0; MOMENTS; NUCLEI
AB The multistep direct TUL model has been extended in order to account for nuclear deformation. The new formalism was tested in calculations of neutron emission spectra from the (232)Th(n, xn) reaction. These calculations include vibration-rotational coupled channels for the inelastic scattering to low-lying collective levels, "deformed" multistep direct (MSD) for inelastic scattering to the continuum, multistep compound, and Hauser-Feshbach with advanced treatment of the fission channel. Prompt fission neutrons were also calculated. The comparison with experimental data shows clear improvement over the "spherical" MSD calculations and JEFF-3.1 and JENDL-3.3 evaluations. Similar calculational results have been obtained of neutron emission spectra from the stable deformed nuclei (181)Ta and (184)W.
C1 [Wienke, H.] Belgonucleaire, B-2480 Dessel, Belgium.
[Capote, R.] IAEA, Nucl Data Sect, A-1400 Vienna, Austria.
[Herman, M.] Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
[Sin, M.] Univ Bucharest, Dept Nucl Phys, Bucharest, Romania.
RP Wienke, H (reprint author), Belgonucleaire, B-2480 Dessel, Belgium.
EM h.wienke@belgacom.net
RI Capote Noy, Roberto/M-1245-2014
OI Capote Noy, Roberto/0000-0002-1799-3438
FU CNCSIS [96GR/2007]; International Atomic Energy Agency
FX One co-author, M. S., was partially supported by CNCSIS under grant
96GR/2007, code 1650 and by the International Atomic Energy Agency.
NR 36
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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 DEC
PY 2008
VL 78
IS 6
AR 064611
DI 10.1103/PhysRevC.78.064611
PG 6
WC Physics, Nuclear
SC Physics
GA 391QP
UT WOS:000262248100037
ER
PT J
AU Wong, CY
AF Wong, Cheuk-Yin
TI Momentum kick model description of the near-side ridge and jet quenching
SO PHYSICAL REVIEW C
LA English
DT Review
ID HEAVY-ION COLLISIONS; QUARK-GLUON PLASMA; NUCLEUS-NUCLEUS COLLISIONS;
PARTICLE-PRODUCTION MECHANISM; COLOR GLASS CONDENSATE; LUND MONTE-CARLO;
ENERGY-LOSS; MULTIPARTICLE PRODUCTION; SCHWINGER MODEL; E+E-PHYSICS
AB In the momentum kick model, a near-side jet emerges near the surface, kicks medium partons, loses energy, and fragments into the trigger particle and fragmentation products. The kicked medium partons subsequently materialize as the observed ridge particles, which carry direct information on the magnitude of the momentum kick and the initial parton momentum distribution at the moment of jet-medium-parton collisions. The initial parton momentum distribution extracted from the STAR ridge data for central Au + Au collisions at root s(NN) = 200 GeV has a thermal-like transverse momentum distribution and a rapidity plateau structure with a relatively flat distribution at mid-rapidity and sharp kinematic boundaries at large rapidities. Such a rapidity plateau structure may arise from particle production in flux tubes, as color charges and anticolor charges separate at high energies. The centrality dependence of the ridge yield and the degree of jet quenching can be consistently described by the momentum kick model.
C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RP Wong, CY (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
EM wongc@ornl.gov
OI Wong, Cheuk-Yin/0000-0001-8223-0659
FU Division of Nuclear Physics; US Department of Energy [DE-
AC05-00OR22725]
FX The author wishes to thank Drs. Fuqiang Wang, V. Cianciolo, Jiangyong
Jia, Zhangbu Xu, and C. Nattrass for helpful discussions and
communications. This research was supported in part by the Division of
Nuclear Physics, US Department of Energy, under Contract No. DE-
AC05-00OR22725, managed by UT- Battelle, LLC.
NR 113
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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 DEC
PY 2008
VL 78
IS 6
AR 064905
DI 10.1103/PhysRevC.78.064905
PG 21
WC Physics, Nuclear
SC Physics
GA 391QP
UT WOS:000262248100049
ER
PT J
AU Xu, Q
Zhu, SJ
Hamilton, JH
Ramayya, AV
Hwang, JK
Qi, B
Meng, J
Peng, J
Luo, YX
Rasmussen, JO
Lee, IY
Liu, SH
Li, K
Wang, JG
Ding, HB
Gu, L
Yeoh, EY
Ma, WC
AF Xu, Q.
Zhu, S. J.
Hamilton, J. H.
Ramayya, A. V.
Hwang, J. K.
Qi, B.
Meng, J.
Peng, J.
Luo, Y. X.
Rasmussen, J. O.
Lee, I. Y.
Liu, S. H.
Li, K.
Wang, J. G.
Ding, H. B.
Gu, L.
Yeoh, E. Y.
Ma, W. C.
TI Identification of pseudospin partner bands in Tc-108
SO PHYSICAL REVIEW C
LA English
DT Article
ID SPIN SYMMETRY; ISOTOPES; FISSION
AB High-spin structures in the neutron-rich Tc-108 nucleus have been reinvestigated by measuring the prompt gamma-rays from spontaneous fission of Cf-252. A previously known collective band has been extended up to higher spin states and a new side band has been identified. These doublet bands are proposed as pseudospin partner bands with configurations pi 1/2(+)[431] circle times nu[(312) over tilde 5/2(+), 3/2(+)], which is a first identification in A similar to 100 region. The particle-rotor model (PRM) was applied to calculate levels and B(M1)/B(E2) ratios of the bands in Tc-108. The calculated results are in good agreement with the experimental values.
C1 [Xu, Q.; Zhu, S. J.; Wang, J. G.; Ding, H. B.; Gu, L.; Yeoh, E. Y.] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China.
[Zhu, S. J.; Hamilton, J. H.; Ramayya, A. V.; Hwang, J. K.; Luo, Y. X.; Liu, S. H.; Li, K.] Vanderbilt Univ, Dept Phys, Nashville, TN 37235 USA.
[Qi, B.; Meng, J.] Peking Univ, Sch Phys, Beijing 100871, Peoples R China.
[Peng, J.] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China.
[Luo, Y. X.; Rasmussen, J. O.; Lee, I. Y.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Ma, W. C.] Mississippi State Univ, Dept Phys, Mississippi State, MS 39762 USA.
RP Xu, Q (reprint author), Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China.
EM zhushj@mail.tsinghua.edu.cn
RI Qi, Bin/G-7657-2012; Meng, Jie/B-8548-2009
OI Meng, Jie/0000-0002-0977-5318
FU National Natural Science Foundation of China [10575057, 10775078]; Major
State Basic Research Development Program [2007CB815005]; Special Program
of Higher Education Science Foundation [20070003149]; US Department of
Energy [DE-FG05-88ER40407, DE-AC03-76SF00098]
FX The work in Tsinghua University was supported by the National Natural
Science Foundation of China under Grant Nos. 10575057, 10775078, the
Major State Basic Research Development Program under Grand No.
2007CB815005, the Special Program of Higher Education Science Foundation
under Grant No. 20070003149. The work at Vanderbilt University, Lawrence
Berkeley National Laboratory, was supported, respectively, by the US
Department of Energy under Grant and Contract Nos. DE-FG05-88ER40407 and
DE-AC03-76SF00098.
NR 25
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD DEC
PY 2008
VL 78
IS 6
AR 064301
DI 10.1103/PhysRevC.78.064301
PG 7
WC Physics, Nuclear
SC Physics
GA 391QP
UT WOS:000262248100009
ER
PT J
AU Aaltonen, T
Adelman, J
Akimoto, T
Albrow, MG
Gonzalez, BA
Amerio, S
Amidei, D
Anastassov, A
Annovi, A
Antos, J
Aoki, M
Apollinari, G
Apresyan, A
Arisawa, T
Artikov, A
Ashmanskas, W
Attal, A
Aurisano, A
Azfar, F
Azzi-Bacchetta, P
Azzurri, P
Bacchetta, N
Badgett, W
Barbaro-Galtieri, A
Barnes, VE
Barnett, BA
Baroiant, S
Bartsch, V
Bauer, G
Beauchemin, PH
Bedeschi, F
Bednar, P
Behari, S
Bellettini, G
Bellinger, J
Belloni, A
Benjamin, D
Beretvas, A
Beringer, J
Berry, T
Bhatti, A
Binkley, M
Bisello, D
Bizjak, I
Blair, RE
Blocker, C
Blumenfeld, B
Bocci, A
Bodek, A
Boisvert, V
Bolla, G
Bolshov, A
Bortoletto, D
Boudreau, J
Boveia, A
Brau, B
Bridgeman, A
Brigliadori, L
Bromberg, C
Brubaker, E
Budagov, J
Budd, HS
Budd, S
Burkett, K
Busetto, G
Bussey, P
Buzatu, A
Byrum, KL
Cabrera, S
Campanelli, M
Campbell, M
Canelli, F
Canepa, A
Carlsmith, D
Carosi, R
Carrillo, S
Carron, S
Casal, B
Casarsa, M
Castro, A
Catastini, P
Cauz, D
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
Ciobanu, CI
Ciocci, MA
Clark, A
Clark, D
Compostella, G
Convery, ME
Conway, J
Cooper, B
Copic, K
Cordelli, M
Cortiana, G
Crescioli, F
Cuenca Almenar, C
Cuevas, J
Culbertson, R
Cully, JC
Dagenhart, D
Datta, M
Davies, T
de Barbaro, P
De Cecco, S
Deisher, A
De Lentdecker, G
De Lorenzo, G
Dell'Orso, M
Demortier, L
Deng, J
Deninno, M
De Pedis, D
Derwent, PF
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
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
Forrester, S
Franklin, M
Freeman, JC
Furic, I
Gallinaro, M
Galyardt, J
Garberson, F
Garcia, JE
Garfinkel, AF
Gerberich, H
Gerdes, D
Giagu, S
Giakoumopolou, V
Giannetti, P
Gibson, K
Gimmell, JL
Ginsburg, CM
Giokaris, N
Giordani, M
Giromini, P
Giunta, M
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
Guimaraes da Costa, J
Gunay-Unalan, Z
Haber, C
Hahn, K
Hahn, SR
Halkiadakis, E
Hamilton, A
Han, BY
Han, JY
Handler, R
Happacher, F
Hara, K
Hare, D
Hare, M
Harper, S
Harr, RF
Harris, RM
Hartz, M
Hatakeyama, K
Hauser, J
Hays, C
Heck, M
Heijboer, A
Heinemann, B
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
Huston, J
Incandela, J
Introzzi, G
Iori, M
Ivanov, A
Iyutin, B
James, E
Jayatilaka, B
Jeans, D
Jeon, EJ
Jindariani, S
Johnson, W
Jones, M
Joo, KK
Jun, SY
Jung, JE
Junk, TR
Kamon, T
Kar, D
Karchin, PE
Kato, Y
Kephart, R
Kerzel, U
Khotilovich, V
Kilminster, B
Kim, DH
Kim, HS
Kim, JE
Kim, MJ
Kim, SB
Kim, SH
Kim, YK
Kimura, N
Kirsch, L
Klimenko, S
Klute, M
Knuteson, B
Ko, BR
Koay, SA
Kondo, K
Kong, DJ
Konigsberg, J
Korytov, A
Kotwal, AV
Kraus, J
Kreps, M
Kroll, J
Krumnack, N
Kruse, M
Krutelyov, V
Kubo, T
Kuhlmann, SE
Kuhr, T
Kulkarni, NP
Kusakabe, Y
Kwang, S
Laasanen, AT
Lai, S
Lami, S
Lammel, S
Lancaster, M
Lander, RL
Lannon, K
Lath, A
Latino, G
Lazzizzera, I
LeCompte, T
Lee, J
Lee, J
Lee, YJ
Lee, SW
Lefevre, R
Leonardo, N
Leone, S
Levy, S
Lewis, JD
Lin, C
Lin, CS
Linacre, J
Lindgren, M
Lipeles, E
Lister, A
Litvintsev, DO
Liu, T
Lockyer, NS
Loginov, A
Loreti, M
Lovas, L
Lu, RS
Lucchesi, D
Lueck, J
Luci, C
Lujan, P
Lukens, P
Lungu, G
Lyons, L
Lys, J
Lysak, R
Lytken, E
Mack, P
MacQueen, D
Madrak, R
Maeshima, K
Makhoul, K
Maki, T
Maksimovic, P
Malde, S
Malik, S
Manca, G
Manousakis, A
Margaroli, F
Marino, C
Marino, CP
Martin, A
Martin, M
Martin, V
Martinez, M
Martinez-Ballarin, R
Maruyama, T
Mastrandrea, P
Masubuchi, T
Mattson, ME
Mazzanti, P
McFarland, KS
McIntyre, P
McNulty, R
Mehta, A
Mehtala, P
Menzemer, S
Menzione, A
Merkel, P
Mesropian, C
Messina, A
Miao, T
Miladinovic, N
Miles, J
Miller, R
Mills, C
Milnik, M
Mitra, A
Mitselmakher, G
Miyake, H
Moed, S
Moggi, N
Moon, CS
Moore, R
Morello, M
Movilla Fernandez, P
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
Neu, C
Neubauer, MS
Nielsen, J
Nodulman, L
Norman, M
Norniella, O
Nurse, E
Oh, SH
Oh, YD
Oksuzian, I
Okusawa, T
Oldeman, R
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
Pellett, DE
Penzo, A
Phillips, TJ
Piacentino, G
Piedra, J
Pinera, L
Pitts, K
Plager, C
Pondrom, L
Portell, X
Poukhov, O
Pounder, N
Prakoshyn, F
Pronko, A
Proudfoot, J
Ptohos, F
Punzi, G
Pursley, J
Rademacker, J
Rahaman, A
Ramakrishnan, V
Ranjan, N
Redondo, I
Reisert, B
Rekovic, V
Renton, P
Rescigno, M
Richter, S
Rimondi, F
Ristori, L
Robson, A
Rodrigo, T
Rogers, E
Rolli, S
Roser, R
Rossi, M
Rossin, R
Roy, P
Ruiz, A
Russ, J
Rusu, V
Saarikko, H
Safonov, A
Sakumoto, WK
Salamanna, G
Salto, O
Santi, L
Sarkar, S
Sartori, L
Sato, K
Savoy-Navarro, A
Scheidle, T
Schlabach, P
Schmidt, EE
Schmidt, MA
Schmidt, MP
Schmitt, M
Schwarz, T
Scodellaro, L
Scott, AL
Scribano, A
Scuri, F
Sedov, A
Seidel, S
Seiya, Y
Semenov, A
Sexton-Kennedy, L
Sfyria, A
Shalhout, SZ
Shapiro, MD
Shears, T
Shepard, PF
Sherman, D
Shimojima, M
Shochet, M
Shon, Y
Shreyber, I
Sidoti, A
Sinervo, P
Sisakyan, A
Slaughter, AJ
Slaunwhite, J
Sliwa, K
Smith, JR
Snider, FD
Snihur, R
Soderberg, M
Soha, A
Somalwar, S
Sorin, V
Spalding, J
Spinella, F
Spreitzer, T
Squillacioti, P
Stanitzki, M
St Denis, R
Stelzer, B
Stelzer-Chilton, O
Stentz, D
Strologas, J
Stuart, D
Suh, JS
Sukhanov, A
Sun, H
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
Tiwari, V
Tkaczyk, S
Toback, D
Tokar, S
Tollefson, K
Tomura, T
Tonelli, D
Torre, S
Torretta, D
Tourneur, S
Trischuk, W
Tu, Y
Turini, N
Ukegawa, F
Uozumi, S
Vallecorsa, S
van Remortel, N
Varganov, A
Vataga, E
Vazquez, F
Velev, G
Vellidis, C
Veszpremi, V
Vidal, M
Vidal, R
Vila, I
Vilar, R
Vine, T
Vogel, M
Volobouev, I
Volpi, G
Wurthwein, F
Wagner, P
Wagner, RG
Wagner, RL
Wagner-Kuhr, J
Wagner, W
Wakisaka, T
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Yang, Y. C.
Yao, W. M.
Yeh, G. P.
Yoh, J.
Yorita, K.
Yoshida, T.
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CA CDF-Collaboration
TI First measurement of the fraction of top-quark pair production through
gluon-gluon fusion
SO PHYSICAL REVIEW D
LA English
DT Article
ID HADRON COLLIDERS; JETS
AB We present the first measurement of sigma(gg -> t (t) over bar)/sigma(p (p) over bar -> t (t) over bar). We use 0.96 fb(-1) of root s = 1.96 TeV p (p) over bar collision data recorded with the CDF II detector at Fermilab. Using charged particles with low transverse momentum in t (t) over bar events, we find sigma(gg -> t (t) over bar)/sigma(p (p) over bar -> t (t) over bar) = 0.07 +/- 0.14(stat) +/- 0.07(syst), corresponding to a 95% confidence level upper limit of 0.33, in agreement with the standard model next-to-leading-order prediction of 0.15 +/- 0.05.
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[Beauchemin, P. -H.; Buzatu, A.; Carron, S.; Lai, S.; MacQueen, D.; Pashapour, S.; Roy, P.; Sinervo, P.; Snihur, R.; Spreitzer, T.; Trischuk, W.; Warburton, A.; Williams, G.] McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada.
[Amidei, D.; Campbell, M.; Copic, K.; Cully, J. C.; Gerdes, D.; Soderberg, M.; Tecchio, M.; Varganov, A.; Wright, T.] Univ Michigan, Ann Arbor, MI 48109 USA.
[Bromberg, C.; Campanelli, M.; Gunay-Unalan, Z.; Huston, J.; Messina, A.; Miller, R.; Sorin, V.; Tollefson, K.] Michigan State Univ, E Lansing, MI 48824 USA.
[Gold, M.; Gorelov, I.; Rekovic, V.; Seidel, S.; Strologas, J.; Vataga, E.; Vogel, M.] Univ New Mexico, Albuquerque, NM 87131 USA.
[Schmitt, M.; Stentz, D.] Northwestern Univ, Evanston, IL 60208 USA.
[Efron, J.; Hughes, R. E.; Kilminster, B.; Lannon, K.; Parks, B.; Slaunwhite, J.; Winer, B. L.] Ohio State Univ, Columbus, OH 43210 USA.
[Nakano, I.; Takashima, R.; Tanaka, R.; Yamashita, T.] 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.; Azzi-Bacchetta, P.; Bacchetta, N.; Bisello, D.; Busetto, G.; Compostella, G.; Cortiana, G.; Donini, J.; Dorigo, T.; Gresele, A.; Lazzizzera, I.; Loreti, M.; Lucchesi, D.; Griso, S. Pagan] Univ Padua, Ist Nazl Fis Nucl, Sez Padova Trento, I-35131 Padua, Italy.
[Di Giovanni, G. P.; Piedra, J.; Savoy-Navarro, A.; Tourneur, S.] Univ Paris 06, CNRS IN2P3, UMR7585, LPNHE, F-75252 Paris, France.
[Canepa, A.; Heijboer, A.; Heinrich, J.; Kroll, J.; Lockyer, N. S.; Neu, C.; Thomson, E.; Tu, Y.; Wagner, P.; Whiteson, D.; Williams, H. H.] Univ Penn, Philadelphia, PA 19104 USA.
[Azzurri, P.; Bedeschi, F.; Bellettini, G.; Carosi, R.; Catastini, P.; Chiarelli, G.; Ciocci, M. A.; Crescioli, F.; Dell'Orso, M.; Donati, S.; Ferrazza, C.; Garcia, J. E.; Giakoumopolou, V.; Giannetti, P.; Giunta, M.; Introzzi, G.; Lami, S.; Latino, G.; Leone, S.; Menzione, A.; Morello, M.; Pagliarone, C.; Piacentino, G.; Punzi, G.; Ristori, L.; Sartori, L.; Scribano, A.; Scuri, F.; Sidoti, A.; Spinella, F.; Squillacioti, P.; Turini, N.; Vellidis, C.; Volpi, G.] Univ Pisa, Ist Nazl Fis Nucl Pisa, Siena, Italy.
[Boudreau, J.; Gibson, K.; Hartz, M.; 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.; Lytken, E.; Margaroli, F.; Merkel, P.; Ranjan, N.; Sedov, A.; Veszpremi, V.] Purdue Univ, W Lafayette, IN 47907 USA.
[Bodek, A.; Boisvert, V.; Budd, H. S.; Chung, Y. S.; de Barbaro, P.; De Lentdecker, G.; Gimmell, J. L.; Han, B. -Y.; Han, J. Y.; Lee, J.; McFarland, K. S.; Sakumoto, W. K.; Yu, G. B.] Univ Rochester, Rochester, NY 14627 USA.
[Bhatti, A.; Demortier, L.; Gallinaro, M.; Goulianos, K.; Hatakeyama, K.; Mesropian, C.; Terashi, K.] Rockefeller Univ, New York, NY 10021 USA.
[De Cecco, S.; De Pedis, D.; Dionisi, C.; Giagu, S.; Iori, M.; Jeans, D.; Luci, C.; Mastrandrea, P.; Rescigno, M.; Salamanna, G.; Sarkar, S.; Zanello, L.] Univ Roma La Sapienza, Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy.
[Anastassov, A.; Chuang, S. H.; Dube, S.; Halkiadakis, E.; Hare, D.; Lath, A.; Somalwar, S.; Yamaoka, J.] Rutgers State Univ, Piscataway, NJ 08855 USA.
[Aurisano, A.; Goncharov, M.; Kamon, T.; Khotilovich, V.; 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.; Pauletta, G.; Penzo, A.; Rossi, M.; Santi, L.; Zanetti, A.] Univ Trieste, Ist Nazl Fis Nucl, Udine, Italy.
[Akimoto, T.; Hara, K.; Kim, S. H.; Kimura, N.; Kubo, T.; Maruyama, T.; Masubuchi, T.; Miyake, H.; Nagai, Y.; Nagano, A.; Nakamura, K.; Shimojima, M.; Suzuki, T.; Takeuchi, Y.; Tomura, T.; Ukegawa, F.; Uozumi, S.] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan.
[Hare, M.; Napier, A.; Rolli, S.; Sliwa, K.; Sun, H.; Whitehouse, B.] Tufts Univ, Medford, MA 02155 USA.
[Arisawa, T.; Kondo, K.; Kusakabe, Y.; Naganoma, J.] 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.; Handler, R.; Herndon, M.; Pondrom, L.; Pursley, J.; Ramakrishnan, V.; Shon, Y.] Univ Wisconsin, Madison, WI 53706 USA.
[Feild, R. G.; Husemann, U.; Lin, C.; Loginov, A.; Martin, A.; Schmidt, M. P.; Stanitzki, M.; Tipton, P.; Yang, C.] Yale Univ, New Haven, CT 06520 USA.
[Chang, S. H.; Cho, K.; Jeon, E. J.; Joo, K. K.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Kim, J. E.; Kim, S. B.; Kong, D. J.; Lee, J.; Lee, Y. 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, J. E.; Kim, S. B.; Kong, D. J.; Lee, J.; Lee, Y. 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, J. E.; Kim, S. B.; Kong, D. J.; Lee, J.; Lee, Y. J.; Moon, C. S.; Oh, Y. D.; Suh, J. S.; Yang, Y. C.; Yu, I.] Korea Inst Sci & Technol Informat, Taejon 305806, South Korea.
[Chang, S. H.; Cho, K.; Jeon, E. J.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Kim, J. E.; Kim, S. B.; Kong, D. J.; Lee, J.; Lee, Y. J.; Moon, C. S.; Oh, Y. D.; Suh, J. S.; Yang, Y. C.; Yu, I.] Chonnam Natl Univ, Kwangju 500757, South Korea.
[Bartsch, V.; Bizjak, I.; Cerrito, L.; Cooper, B.; Lancaster, M.; Malik, S.; Nurse, E.; Vine, T.; Waters, D.] UCL, London WC1E 6BT, England.
[Azzurri, P.; Bedeschi, F.; Bellettini, G.; Carosi, R.; Catastini, P.; Chiarelli, G.; Ciocci, M. A.; Crescioli, F.; Dell'Orso, M.; Donati, S.; Ferrazza, C.; Garcia, J. E.; Giakoumopolou, V.; Giannetti, P.; Giunta, M.; Introzzi, G.; Lami, S.; Latino, G.; Menzione, A.; Morello, M.; Pagliarone, C.; Piacentino, G.; Punzi, G.; Ristori, L.; Sartori, L.; Scribano, A.; Scuri, F.; Sidoti, A.; Spinella, F.; Squillacioti, P.; Turini, N.; Vellidis, C.; Volpi, G.] Scuola Normale Super Pisa, I-56127 Pisa, Italy.
[Beauchemin, P. -H.; Buzatu, A.; Carron, S.; Lai, S.; MacQueen, D.; Pashapour, S.; Roy, P.; Sinervo, P.; Snihur, R.; Spreitzer, T.; Trischuk, W.; Warburton, A.; Williams, G.] Univ Toronto, Toronto, ON M5S 1A7, Canada.
[Azfar, F.; Harper, S.; Hays, C.; Huffman, B. T.; Linacre, J.; Lyons, L.; Malde, S.; Pounder, N.; Rademacker, J.; Renton, P.; Stelzer-Chilton, O.] Univ Oxford, Oxford OX1 3RH, England.
[Aaltonen, T.; Maki, T.; Mehtala, P.; Orava, R.; Osterberg, K.; Saarikko, H.; van Remortel, N.; Zhang, X.] Helsinki Inst Phys, FIN-00014 Helsinki, Finland.
[Chen, Y. C.; Hou, S.; Lu, R. -S.; Mitra, A.; Teng, P. K.; Vazquez, F.; Wang, S. M.] Acad Sinica, Inst Phys, Taipei 11529, Taiwan.
RP Aaltonen, T (reprint author), Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland.
RI Grinstein, Sebastian/N-3988-2014; Muelmenstaedt, Johannes/K-2432-2015;
Gorelov, Igor/J-9010-2015; Prokoshin, Fedor/E-2795-2012; Leonardo,
Nuno/M-6940-2016; Canelli, Florencia/O-9693-2016; Chiarelli,
Giorgio/E-8953-2012; Lysak, Roman/H-2995-2014; Moon,
Chang-Seong/J-3619-2014; Scodellaro, Luca/K-9091-2014; Paulini,
Manfred/N-7794-2014; Russ, James/P-3092-2014; unalan,
zeynep/C-6660-2015; Lazzizzera, Ignazio/E-9678-2015; vilar,
rocio/P-8480-2014; Cabrera Urban, Susana/H-1376-2015; Garcia, Jose
/H-6339-2015; ciocci, maria agnese /I-2153-2015; Cavalli-Sforza,
Matteo/H-7102-2015; Introzzi, Gianluca/K-2497-2015; Ivanov,
Andrew/A-7982-2013; Warburton, Andreas/N-8028-2013; Kim,
Soo-Bong/B-7061-2014; Ruiz, Alberto/E-4473-2011; Robson,
Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; St.Denis,
Richard/C-8997-2012; Azzi, Patrizia/H-5404-2012; manca,
giulia/I-9264-2012; Amerio, Silvia/J-4605-2012; Punzi,
Giovanni/J-4947-2012; messina, andrea/C-2753-2013; Annovi,
Alberto/G-6028-2012;
OI Giordani, Mario/0000-0002-0792-6039; Casarsa,
Massimo/0000-0002-1353-8964; Vidal Marono, Miguel/0000-0002-2590-5987;
Margaroli, Fabrizio/0000-0002-3869-0153; Latino,
Giuseppe/0000-0002-4098-3502; Group, Robert/0000-0002-4097-5254; iori,
maurizio/0000-0002-6349-0380; Grinstein, Sebastian/0000-0002-6460-8694;
Lancaster, Mark/0000-0002-8872-7292; Nielsen, Jason/0000-0002-9175-4419;
Muelmenstaedt, Johannes/0000-0003-1105-6678; Gorelov,
Igor/0000-0001-5570-0133; Prokoshin, Fedor/0000-0001-6389-5399;
Leonardo, Nuno/0000-0002-9746-4594; Canelli,
Florencia/0000-0001-6361-2117; Lami, Stefano/0000-0001-9492-0147;
Chiarelli, Giorgio/0000-0001-9851-4816; Moon,
Chang-Seong/0000-0001-8229-7829; Scodellaro, Luca/0000-0002-4974-8330;
Paulini, Manfred/0000-0002-6714-5787; Russ, James/0000-0001-9856-9155;
unalan, zeynep/0000-0003-2570-7611; Lazzizzera,
Ignazio/0000-0001-5092-7531; ciocci, maria agnese /0000-0003-0002-5462;
Introzzi, Gianluca/0000-0002-1314-2580; Ivanov,
Andrew/0000-0002-9270-5643; Warburton, Andreas/0000-0002-2298-7315;
Ruiz, Alberto/0000-0002-3639-0368; Azzi, Patrizia/0000-0002-3129-828X;
Punzi, Giovanni/0000-0002-8346-9052; Annovi,
Alberto/0000-0002-4649-4398; Jun, Soon Yung/0000-0003-3370-6109; Toback,
David/0000-0003-3457-4144; Hays, Chris/0000-0003-2371-9723; Farrington,
Sinead/0000-0001-5350-9271; Robson, Aidan/0000-0002-1659-8284;
Gallinaro, Michele/0000-0003-1261-2277; Salamanna,
Giuseppe/0000-0002-0861-0052; Torre, Stefano/0000-0002-7565-0118;
Turini, Nicola/0000-0002-9395-5230; Osterberg,
Kenneth/0000-0003-4807-0414
NR 27
TC 7
Z9 8
U1 1
U2 8
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 DEC
PY 2008
VL 78
IS 11
AR 111101
DI 10.1103/PhysRevD.78.111101
PG 8
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200001
ER
PT J
AU Allton, C
Antonio, DJ
Aoki, Y
Blum, T
Boyle, PA
Christ, NH
Clark, MA
Cohen, SD
Dawson, C
Donnellan, MA
Flynn, JM
Hart, A
Izubuchi, T
Jung, C
Juttner, A
Kennedy, AD
Kenway, RD
Li, M
Li, S
Lin, MF
Mawhinney, RD
Maynard, CM
Ohta, S
Pendleton, BJ
Sachrajda, CT
Sasaki, S
Scholz, EE
Soni, A
Tweedie, RJ
Wennekers, J
Yamazaki, T
Zanotti, JM
AF Allton, C.
Antonio, D. J.
Aoki, Y.
Blum, T.
Boyle, P. A.
Christ, N. H.
Clark, M. A.
Cohen, S. D.
Dawson, C.
Donnellan, M. A.
Flynn, J. M.
Hart, A.
Izubuchi, T.
Jung, C.
Juttner, A.
Kennedy, A. D.
Kenway, R. D.
Li, M.
Li, S.
Lin, M. F.
Mawhinney, R. D.
Maynard, C. M.
Ohta, S.
Pendleton, B. J.
Sachrajda, C. T.
Sasaki, S.
Scholz, E. E.
Soni, A.
Tweedie, R. J.
Wennekers, J.
Yamazaki, T.
Zanotti, J. M.
TI Physical results from 2+1 flavor domain wall QCD and SU(2) chiral
perturbation theory
SO PHYSICAL REVIEW D
LA English
DT Review
ID HEAVY-LIGHT MESONS; FINITE-VOLUME; PARTICLE PHYSICS; GAUGE-THEORIES;
STRANGE QUARK; QUENCHED QCD; LATTICE; FERMIONS; DECAYS; MASS
AB We have simulated QCD using 2 + 1 flavors of domain wall quarks and the Iwasaki gauge action on a (2.74 fm)(3) volume with an inverse lattice scale of a(-1) = 1.729(28) GeV. The up and down (light) quarks are degenerate in our calculations and we have used four values for the ratio of light quark masses to the strange (heavy) quark mass in our simulations: 0.217, 0.350, 0.617, and 0.884. We have measured pseudoscalar meson masses and decay constants, the kaon bag parameter B-K, and vector meson couplings. We have used SU(2) chiral perturbation theory, which assumes only the up and down quark masses are small, and SU(3) chiral perturbation theory to extrapolate to the physical values for the light quark masses. While next-to-leading order formulas from both approaches fit our data for light quarks, we find the higher-order corrections for SU(3) very large, making such fits unreliable. We also find that SU(3) does not fit our data when the quark masses are near the physical strange quark mass. Thus, we rely on SU(2) chiral perturbation theory for accurate results. We use the masses of the Omega baryon, and the pi and K mesons to set the lattice scale and determine the quark masses. We then find f(pi) = 124.1(3.6)(stat) X (6.9)(syst) MeV, f(K) = 149.6(3.6)(stat)(6.3)(syst) MeV, and f(K)/f(pi) = 1.205(0.018)(stat)(0.062)(syst). Using nonperturbative renormalization to relate lattice regularized quark masses to regularization independent momentum scheme masses, and perturbation theory to relate these to (MS) over bar, we find m(ud)((MS) over bar)(2 GeV) = 3: 72(0.16)(stat)(0.33)(ren)(0.18)(syst) MeV, m(s)((MS) over bar)(2 GeV) = 107.3(4.4)(stat)(9.7)(ren)(4.9)(syst) MeV, and (m) over tilde (ud):(m) over tilde (s) = 1:28.8(0.4)(stat)(1.6)(syst). For the kaon bag parameter, we find B-K((MS) over bar) (2 GeV) = 0.524(0.010)(stat)(0.013)(ren) X (0.025)(syst). Finally, for the ratios of the couplings of the vector mesons to the vector and tensor currents (f(V) and f(V)(T), respectively) in the (MS) over bar scheme at 2 GeV we obtain f(rho)(T)/f(rho) = 0.687(27); f(K*)(T)/f(K*) = 0.712(12), and f(phi)(T)/f(phi) = 0.750(8).
C1 [Allton, C.] Swansea Univ, Dept Phys, Swansea SA2 8PP, W Glam, Wales.
[Antonio, D. J.; Boyle, P. A.; Hart, A.; Kennedy, A. D.; Kenway, R. D.; Pendleton, B. J.; Tweedie, R. J.; Wennekers, J.; Zanotti, J. M.] Univ Edinburgh, Sch Phys, SUPA, Edinburgh EH9 3JZ, Midlothian, Scotland.
[Aoki, Y.; Blum, T.; Dawson, C.; Izubuchi, T.; Ohta, S.; Sasaki, S.] Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA.
[Blum, T.; Yamazaki, T.] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA.
[Christ, N. H.; Cohen, S. D.; Li, M.; Li, S.; Lin, M. F.; Mawhinney, R. D.] Columbia Univ, Dept Phys, New York, NY 10027 USA.
[Clark, M. A.] Boston Univ, Ctr Computat Sci, Boston, MA 02215 USA.
[Donnellan, M. A.; Flynn, J. M.; Juttner, A.; Sachrajda, C. T.] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England.
[Izubuchi, T.] Kanazawa Univ, Inst Theoret Phys, Kanazawa, Ishikawa 9201192, Japan.
[Izubuchi, T.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Maynard, C. M.] Univ Edinburgh, Sch Phys, EPCC, Edinburgh EH9 3JZ, Midlothian, Scotland.
[Ohta, S.] KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 3050801, Japan.
[Ohta, S.] Sokendai Grad Univ Adv Studies, Dept Phys, Hayama, Kanagawa 2400193, Japan.
[Sasaki, S.] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan.
RP Allton, C (reprint author), Swansea Univ, Dept Phys, Swansea SA2 8PP, W Glam, Wales.
RI Zanotti, James/H-8128-2012;
OI Zanotti, James/0000-0002-3936-1597; Cohen, Saul/0000-0001-6804-3320;
Flynn, Jonathan/0000-0002-6280-1677; Allton,
Christopher/0000-0003-0795-124X; Pendleton, Brian/0000-0003-4419-8621
NR 101
TC 164
Z9 164
U1 1
U2 8
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 DEC
PY 2008
VL 78
IS 11
AR 114509
DI 10.1103/PhysRevD.78.114509
PG 60
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200060
ER
PT J
AU Aoki, S
Bar, O
Biedermann, B
AF Aoki, Sinya
Baer, Oliver
Biedermann, Benedikt
TI Pion scattering in Wilson chiral perturbation theory
SO PHYSICAL REVIEW D
LA English
DT Article
ID CONTINUUM-LIMIT; LATTICE THEORIES; PHASE-STRUCTURE; QCD; FERMIONS; MASS;
STATES
AB We compute the scattering amplitude for pion scattering in Wilson chiral perturbation theory for two degenerate quark flavors. We consider two different regimes where the quark mass m is of order (i) a Lambda(2)(QCD) and (ii) a(2)Lambda(3)(QCD). Analytic expressions for the scattering lengths in all three isospin channels are given. As a result of the O(a(2)) terms the I = 0 and I = 2 scattering lengths do not vanish in the chiral limit. Moreover, additional chiral logarithms proportional to a(2) lnM(pi)(2) are present in the one-loop results for regime (ii). These contributions significantly modify the familiar results from continuum chiral perturbation theory.
C1 [Aoki, Sinya] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan.
[Aoki, Sinya] Brookhaven Natl Lab, Riken BNL Res Ctr, Upton, NY 11973 USA.
[Baer, Oliver; Biedermann, Benedikt] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany.
RP Aoki, S (reprint author), Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan.
OI Baer, Oliver/0000-0002-7480-6467
FU Japanese Ministry of Education, Culture, Sports, Science and Technology
[20340047]; Deutsche Forschungsgemeinschaft [SFB/TR 09]; Cusanuswerk
FX This work is supported in part by the Grants-in-Aid for Scientific
Research from the Japanese Ministry of Education, Culture, Sports,
Science and Technology (No. 20340047) and by the Deutsche
Forschungsgemeinschaft (SFB/TR 09). B. B. acknowledges financial support
from the Cusanuswerk.
NR 45
TC 11
Z9 11
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 DEC
PY 2008
VL 78
IS 11
AR 114501
DI 10.1103/PhysRevD.78.114501
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200052
ER
PT J
AU Aubert, B
Bona, M
Karyotakis, Y
Lees, JP
Poireau, V
Prencipe, E
Prudent, X
Tisserand, V
Tico, JG
Grauges, E
Lopez, L
Palano, A
Pappagallo, M
Eigen, G
Stugu, B
Sun, L
Abrams, GS
Battaglia, M
Brown, DN
Cahn, RN
Jacobsen, RG
Kerth, LT
Kolomensky, YG
Kukartsev, G
Lynch, G
Osipenkov, IL
Ronan, MT
Tackmann, K
Tanabe, T
Hawkes, CM
Soni, N
Watson, AT
Koch, H
Schroeder, T
Walker, D
Asgeirsson, DJ
Cuhadar-Donszelmann, T
Fulsom, BG
Hearty, C
Mattison, TS
McKenna, JA
Barrett, M
Khan, A
Teodorescu, L
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
Abachi, S
Buchanan, C
Gary, JW
Liu, F
Long, O
Shen, BC
Vitug, GM
Yasin, Z
Zhang, L
Sharma, V
Campagnari, C
Hong, TM
Kovalskyi, D
Mazur, MA
Richman, JD
Beck, TW
Eisner, AM
Flacco, CJ
Heusch, CA
Kroseberg, J
Lockman, WS
Schalk, T
Schumm, BA
Seiden, A
Wang, L
Wilson, MG
Winstrom, LO
Cheng, CH
Doll, DA
Echenard, B
Fang, F
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Andreassen, R
Mancinelli, G
Meadows, BT
Mishra, K
Sokoloff, MD
Blanc, F
Bloom, PC
Ford, WT
Gaz, A
Hirschauer, JF
Kreisel, A
Nagel, M
Nauenberg, U
Smith, JG
Ulmer, KA
Wagner, SR
Ayad, R
Soffer, A
Toki, WH
Wilson, RJ
Altenburg, DD
Feltresi, E
Hauke, A
Jasper, H
Karbach, M
Merkel, J
Petzold, A
Spaan, B
Wacker, K
Kobel, MJ
Mader, WF
Nogowski, R
Schubert, KR
Schwierz, R
Sundermann, JE
Volk, A
Bernard, D
Bonneaud, GR
Latour, E
Thiebaux, C
Verderi, M
Clark, PJ
Gradl, W
Playfer, S
Watson, JE
Andreotti, M
Bettoni, D
Bozzi, C
Calabrese, R
Cecchi, A
Cibinetto, G
Franchini, P
Luppi, E
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
Buzzo, A
Contri, R
Lo Vetere, M
Macri, MM
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Chaisanguanthum, KS
Morii, M
Dubitzky, RS
Marks, J
Schenk, S
Uwer, U
Klose, V
Lacker, HM
Bard, DJ
Dauncey, PD
Nash, JA
Vazquez, WP
Tibbetts, M
Behera, PK
Chai, X
Charles, MJ
Mallik, U
Cochran, J
Crawley, HB
Dong, L
Meyer, WT
Prell, S
Rosenberg, EI
Rubin, AE
Gao, YY
Gritsan, AV
Guo, ZJ
Lae, CK
Denig, AG
Fritsch, M
Schott, G
Arnaud, N
Bequilleux, J
D'Orazio, A
Davier, M
Fermino da Costa, J
Grosdidier, G
Hocker, A
Lepeltier, V
Le Diberder, F
Lutz, AM
Pruvot, S
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
George, KA
Di Lodovico, F
Sacco, R
Sigamani, M
Cowan, G
Flaecher, HU
Hopkins, DA
Paramesvaran, S
Salvatore, F
Wren, AC
Brown, DN
Davis, CL
Alwyn, KE
Barlow, NR
Barlow, RJ
Chia, YM
Edgar, CL
Lafferty, GD
West, TJ
Yi, JI
Anderson, J
Chen, C
Jawahery, A
Roberts, DA
Simi, G
Tuggle, JM
Dallapiccola, C
Hertzbach, SS
Li, X
Salvati, E
Saremi, S
Cowan, R
Dujmic, D
Fisher, PH
Koeneke, K
Sciolla, G
Spitznagel, M
Taylor, F
Yamamoto, RK
Zhao, M
Mclachlin, SE
Patel, PM
Robertson, SH
Lazzaro, A
Lombardo, V
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Sanders, DA
Summers, DJ
Zhao, HW
Simard, M
Taras, P
Viaud, FB
Nicholson, H
De Nardo, G
Lista, L
Monorchio, D
Onorato, G
Sciacca, C
Baak, MA
Raven, G
Snoek, HL
Jessop, CP
Knoepfel, KJ
LoSecco, JM
Wang, WF
Benelli, G
Corwin, LA
Honscheid, K
Kagan, H
Kass, R
Morris, JP
Rahimi, AM
Regensburger, JJ
Sekula, SJ
Wong, QK
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
Briand, H
Calderini, G
Chauveau, J
David, P
Del Buono, L
Hamon, O
Leruste, P
Ocariz, J
Perez, A
Prendki, J
Gladney, L
Biasini, M
Covarelli, R
Manoni, E
Angelini, C
Batignani, G
Bettarini, S
Carpinelli, M
Cervelli, A
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Morganti, M
Neri, N
Paoloni, E
Rizzo, G
Walsh, JJ
Biesiada, J
Lopes Pegna, D
Lu, C
Olsen, J
Smith, AJS
Telnov, AV
Anulli, F
Baracchini, E
Cavoto, G
del Re, D
Di Marco, E
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Jackson, PD
Li Gioi, L
Mazzoni, MA
Morganti, S
Piredda, G
Polci, F
Renga, F
Voena, C
Ebert, M
Hartmann, T
Schroder, H
Waldi, R
Adye, T
Franek, B
Olaiya, EO
Roethel, W
Wilson, FF
Emery, S
Escalier, M
Esteve, L
Gaidot, A
Ganzhur, SF
Hamel de Monchenault, G
Kozanecki, W
Vasseur, G
Yeche, C
Zito, M
Chen, XR
Liu, H
Park, W
Purohit, MV
White, RM
Wilson, JR
Allen, MT
Aston, D
Bartoldus, R
Bechtle, P
Benitez, JF
Cenci, R
Coleman, JP
Convery, MR
Dingfelder, JC
Dorfan, J
Dubois-Felsmann, GP
Dunwoodie, W
Field, RC
Gabareen, AM
Gowdy, SJ
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
Perazzo, A
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
Yi, K
Young, CC
Ziegler, V
Burchat, PR
Edwards, AJ
Majewski, SA
Miyashita, TS
Petersen, BA
Wilden, L
Ahmed, S
Alam, MS
Bula, R
Ernst, JA
Pan, B
Saeed, MA
Zain, SB
Spanier, SM
Wogsland, BJ
Eckmann, R
Ritchie, JL
Ruland, AM
Schilling, CJ
Schwitters, RF
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
Kowalewski, R
Lewczuk, MJ
Nugent, IM
Roney, JM
Sobie, RJ
Gershon, TJ
Harrison, PF
Ilic, J
Latham, TE
Mohanty, GB
Band, HR
Chen, X
Dasu, S
Flood, KT
Pan, Y
Pierini, M
Prepost, R
Vuosalo, CO
Wu, SL
AF Aubert, B.
Bona, M.
Karyotakis, Y.
Lees, J. P.
Poireau, V.
Prencipe, E.
Prudent, X.
Tisserand, V.
Garra Tico, J.
Grauges, E.
Lopez, L.
Palano, A.
Pappagallo, M.
Eigen, G.
Stugu, B.
Sun, L.
Abrams, G. S.
Battaglia, M.
Brown, D. N.
Cahn, R. N.
Jacobsen, R. G.
Kerth, L. T.
Kolomensky, Yu. G.
Kukartsev, G.
Lynch, G.
Osipenkov, I. L.
Ronan, M. T.
Tackmann, K.
Tanabe, T.
Hawkes, C. M.
Soni, N.
Watson, A. T.
Koch, H.
Schroeder, T.
Walker, D.
Asgeirsson, D. J.
Cuhadar-Donszelmann, T.
Fulsom, B. G.
Hearty, C.
Mattison, T. S.
McKenna, J. A.
Barrett, M.
Khan, A.
Teodorescu, L.
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.
Abachi, S.
Buchanan, C.
Gary, J. W.
Liu, F.
Long, O.
Shen, B. C.
Vitug, G. M.
Yasin, Z.
Zhang, L.
Sharma, V.
Campagnari, C.
Hong, T. M.
Kovalskyi, D.
Mazur, M. A.
Richman, J. D.
Beck, T. W.
Eisner, A. M.
Flacco, C. J.
Heusch, C. A.
Kroseberg, J.
Lockman, W. S.
Schalk, T.
Schumm, B. A.
Seiden, A.
Wang, L.
Wilson, M. G.
Winstrom, L. O.
Cheng, C. H.
Doll, D. A.
Echenard, B.
Fang, F.
Hitlin, D. G.
Narsky, I.
Piatenko, T.
Porter, F. C.
Andreassen, R.
Mancinelli, G.
Meadows, B. T.
Mishra, K.
Sokoloff, M. D.
Blanc, F.
Bloom, P. C.
Ford, W. T.
Gaz, A.
Hirschauer, J. F.
Kreisel, A.
Nagel, M.
Nauenberg, U.
Smith, J. G.
Ulmer, K. A.
Wagner, S. R.
Ayad, R.
Soffer, A.
Toki, W. H.
Wilson, R. J.
Altenburg, D. D.
Feltresi, E.
Hauke, A.
Jasper, H.
Karbach, M.
Merkel, J.
Petzold, A.
Spaan, B.
Wacker, K.
Kobel, M. J.
Mader, W. F.
Nogowski, R.
Schubert, K. R.
Schwierz, R.
Sundermann, J. E.
Volk, A.
Bernard, D.
Bonneaud, G. R.
Latour, E.
Thiebaux, Ch.
Verderi, M.
Clark, P. J.
Gradl, W.
Playfer, S.
Watson, J. E.
Andreotti, M.
Bettoni, D.
Bozzi, C.
Calabrese, R.
Cecchi, A.
Cibinetto, G.
Franchini, P.
Luppi, E.
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.
Buzzo, A.
Contri, R.
Lo Vetere, M.
Macri, M. M.
Monge, M. R.
Passaggio, S.
Patrignani, C.
Robutti, E.
Santroni, A.
Tosi, S.
Chaisanguanthum, K. S.
Morii, M.
Dubitzky, R. S.
Marks, J.
Schenk, S.
Uwer, U.
Klose, V.
Lacker, H. M.
Bard, D. J.
Dauncey, P. D.
Nash, J. A.
Vazquez, W. Panduro
Tibbetts, M.
Behera, P. K.
Chai, X.
Charles, M. J.
Mallik, U.
Cochran, J.
Crawley, H. B.
Dong, L.
Meyer, W. T.
Prell, S.
Rosenberg, E. I.
Rubin, A. E.
Gao, Y. Y.
Gritsan, A. V.
Guo, Z. J.
Lae, C. K.
Denig, A. G.
Fritsch, M.
Schott, G.
Arnaud, N.
Bequilleux, J.
D'Orazio, A.
Davier, M.
Fermino da Costa, J.
Grosdidier, G.
Hoecker, A.
Lepeltier, V.
Le Diberder, F.
Lutz, A. M.
Pruvot, S.
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.
George, K. A.
Di Lodovico, F.
Sacco, R.
Sigamani, M.
Cowan, G.
Flaecher, H. U.
Hopkins, D. A.
Paramesvaran, S.
Salvatore, F.
Wren, A. C.
Brown, D. N.
Davis, C. L.
Alwyn, K. E.
Barlow, N. R.
Barlow, R. J.
Chia, Y. M.
Edgar, C. L.
Lafferty, G. D.
West, T. J.
Yi, J. I.
Anderson, J.
Chen, C.
Jawahery, A.
Roberts, D. A.
Simi, G.
Tuggle, J. M.
Dallapiccola, C.
Hertzbach, S. S.
Li, X.
Salvati, E.
Saremi, S.
Cowan, R.
Dujmic, D.
Fisher, P. H.
Koeneke, K.
Sciolla, G.
Spitznagel, M.
Taylor, F.
Yamamoto, R. K.
Zhao, M.
Mclachlin, S. E.
Patel, P. M.
Robertson, S. H.
Lazzaro, A.
Lombardo, V.
Palombo, F.
Bauer, J. M.
Cremaldi, L.
Eschenburg, V.
Godang, R.
Kroeger, R.
Sanders, D. A.
Summers, D. J.
Zhao, H. W.
Simard, M.
Taras, P.
Viaud, F. B.
Nicholson, H.
De Nardo, G.
Lista, L.
Monorchio, D.
Onorato, G.
Sciacca, C.
Baak, M. A.
Raven, G.
Snoek, H. L.
Jessop, C. P.
Knoepfel, K. J.
LoSecco, J. M.
Wang, W. F.
Benelli, G.
Corwin, L. A.
Honscheid, K.
Kagan, H.
Kass, R.
Morris, J. P.
Rahimi, A. M.
Regensburger, J. J.
Sekula, S. J.
Wong, Q. K.
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.
del Amo Sanchez, P.
Ben-Haim, E.
Briand, H.
Calderini, G.
Chauveau, J.
David, P.
Del Buono, L.
Hamon, O.
Leruste, Ph.
Ocariz, J.
Perez, A.
Prendki, J.
Gladney, L.
Biasini, M.
Covarelli, R.
Manoni, E.
Angelini, C.
Batignani, G.
Bettarini, S.
Carpinelli, M.
Cervelli, A.
Forti, F.
Giorgi, M. A.
Lusiani, A.
Marchiori, G.
Morganti, M.
Neri, N.
Paoloni, E.
Rizzo, G.
Walsh, J. J.
Biesiada, J.
Lopes Pegna, D.
Lu, C.
Olsen, J.
Smith, A. J. S.
Telnov, A. V.
Anulli, F.
Baracchini, E.
Cavoto, G.
del Re, D.
Di Marco, E.
Faccini, R.
Ferrarotto, F.
Ferroni, F.
Gaspero, M.
Jackson, P. D.
Li Gioi, L.
Mazzoni, M. A.
Morganti, S.
Piredda, G.
Polci, F.
Renga, F.
Voena, C.
Ebert, M.
Hartmann, T.
Schroeder, H.
Waldi, R.
Adye, T.
Franek, B.
Olaiya, E. O.
Roethel, W.
Wilson, F. F.
Emery, S.
Escalier, M.
Esteve, L.
Gaidot, A.
Ganzhur, S. F.
Hamel de Monchenault, G.
Kozanecki, W.
Vasseur, G.
Yeche, Ch.
Zito, M.
Chen, X. R.
Liu, H.
Park, W.
Purohit, M. V.
White, R. M.
Wilson, J. R.
Allen, M. T.
Aston, D.
Bartoldus, R.
Bechtle, P.
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.
Gabareen, A. M.
Gowdy, S. J.
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.
Perazzo, A.
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.
Yi, K.
Young, C. C.
Ziegler, V.
Burchat, P. R.
Edwards, A. J.
Majewski, S. A.
Miyashita, T. S.
Petersen, B. A.
Wilden, L.
Ahmed, S.
Alam, M. S.
Bula, R.
Ernst, J. A.
Pan, B.
Saeed, M. A.
Zain, S. B.
Spanier, S. M.
Wogsland, B. J.
Eckmann, R.
Ritchie, J. L.
Ruland, A. M.
Schilling, C. J.
Schwitters, R. F.
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.
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.
Band, H. R.
Chen, X.
Dasu, S.
Flood, K. T.
Pan, Y.
Pierini, M.
Prepost, R.
Vuosalo, C. O.
Wu, S. L.
CA BABAR-Collaboration
TI Measurements of B((B)over-bar(0) -> Lambda(+)(c)(p)over-bar and B(B- ->
Lambda(+)(c)(p)over-bar pi(-)) and studies of Lambda(+)(c)pi(-)
resonances
SO PHYSICAL REVIEW D
LA English
DT Article
ID BARYONIC B-DECAYS; EXCLUSIVE DECAYS; ANTIBARYON PAIRS; MESON DECAYS;
DETECTOR; JETS
AB We present an investigation of the decays B-0 -> Lambda(+)(c)(p) over bar and B- -> Lambda(+)(c)(p) over bar pi(-) based on 383 X 10(6)Y(4S) -> B (B) over bar decays recorded with the BABAR detector. We measure the branching fractions of these decays; their ratio is B(B- -> Lambda(+)(c)(p) over bar pi(-))/B((B) over bar (0) -> Lambda(+)(c)(p) over bar) = 15.4 +/- 1.8 +/- 0.3. The B- -> Lambda(+)(c)(p) over bar pi(-) process exhibits an enhancement at the Lambda(+)(c)(p) over bar threshold and is a laboratory for searches for excited charm baryon states. We observe the resonant decays B- -> Sigma(c)(2455)(0)(p) over bar and B- -> Sigma(c)(2800)(0)(p) over bar but see no evidence for B- -> Sigma(c)(2520)(0)(p) over bar. This is the first observation of the decay B- -> Sigma(c)(2800)(0)(p) over bar; however, the mass of the observed excited Sigma(0)(c) state is (2846 +/- 8 +/- 10) MeV/c(2), which is somewhat inconsistent with previous measurements. Finally, we examine the angular distribution of the B- -> Sigma(c)(2455)(0)(p) over bar decays and measure the spin of the Sigma(c)(2455)(0) baryon to be 1/2, as predicted by the quark model.
C1 [Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.] IN2P3 CNRS, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
[Garra Tico, J.; Grauges, E.] Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain.
[Lopez, L.; Palano, A.; Pappagallo, M.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[Lopez, L.; 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.
[Abrams, G. S.; Battaglia, M.; Brown, D. N.; Cahn, R. N.; Jacobsen, R. G.; Kerth, L. T.; Kolomensky, Yu. G.; Kukartsev, G.; Lynch, G.; Osipenkov, I. L.; Ronan, M. T.; Tackmann, K.; Tanabe, T.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Koch, H.; Schroeder, T.] Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany.
[Asgeirsson, D. J.; Cuhadar-Donszelmann, T.; Fulsom, B. G.; Hearty, C.; Mattison, T. S.; McKenna, J. A.] Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
[Barrett, M.; Khan, A.; Teodorescu, L.] Brunel Univ, Uxbridge UB8 3PH, Middx, England.
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[Lazzaro, A.; Palombo, F.] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
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[del Amo Sanchez, P.; Ben-Haim, E.; Briand, H.; Calderini, G.; Chauveau, J.; David, P.; Del Buono, L.; Hamon, O.; Leruste, Ph.; Ocariz, J.; Perez, A.; Prendki, J.] Univ Paris 07, Univ Paris 06, CNRS IN2P3, Lab Phys Nucl Hautes Energies, F-75252 Paris, France.
[Gladney, L.] Univ Penn, Philadelphia, PA 19104 USA.
[Biasini, M.; Covarelli, R.; Manoni, E.] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy.
[Biasini, M.; Covarelli, R.; Manoni, E.] Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
[Angelini, C.; Batignani, G.; Bettarini, S.; Carpinelli, M.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Lusiani, A.; Marchiori, G.; 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.; Carpinelli, M.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Marchiori, G.; 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.
[Biesiada, J.; Lopes Pegna, D.; Lu, C.; Olsen, J.; Smith, A. J. S.; Telnov, A. V.] Princeton Univ, Princeton, NJ 08544 USA.
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[Baracchini, E.; del Re, D.; Di Marco, E.; Faccini, R.; Ferroni, F.; Gaspero, M.; Polci, F.; 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.
[Emery, S.; Escalier, M.; Esteve, L.; Gaidot, A.; Ganzhur, S. F.; Hamel de Monchenault, G.; Kozanecki, W.; Vasseur, G.; Yeche, Ch.; Zito, M.] CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France.
[Chen, X. R.; Liu, H.; Park, W.; Purohit, M. V.; White, R. M.; Wilson, J. R.] Univ S Carolina, Columbia, SC 29208 USA.
[Allen, M. T.; Aston, D.; Bartoldus, R.; Bechtle, P.; 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.; Gabareen, A. M.; Gowdy, S. J.; 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.; Perazzo, A.; 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.; Yi, K.; Young, C. C.; Ziegler, V.] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
[Burchat, P. R.; Edwards, A. J.; Majewski, S. A.; Miyashita, T. S.; Petersen, B. A.; Wilden, L.] Stanford Univ, Stanford, CA 94305 USA.
[Ahmed, S.; Alam, M. S.; Bula, R.; Ernst, J. A.; Pan, B.; Saeed, M. A.; Zain, S. B.] SUNY Albany, Albany, NY 12222 USA.
[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.] Univ Texas Austin, Austin, TX 78712 USA.
[Drummond, B. W.; Izen, J. M.; Lou, X. C.] Univ Texas Dallas, Dallas, 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 Torino, 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, Dipartimento Fis, I-34127 Trieste, Italy.
[Azzolini, V.; Lopez-March, N.; Martinez-Vidal, F.; Milanes, D. A.; Oyanguren, A.] Univ Valencia, IFIC, CSIC, E-46071 Valencia, Spain.
[Albert, J.; Banerjee, Sw.; Bhuyan, B.; Choi, H. H. F.; Hamano, K.; 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.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
[Band, H. R.; Chen, X.; Dasu, S.; Flood, K. T.; Pan, Y.; Pierini, M.; Prepost, R.; Vuosalo, C. O.; Wu, S. L.] Univ Wisconsin, Madison, WI 53706 USA.
[Carpinelli, M.] Univ Sassari, Sassari, Italy.
[Adye, T.; Franek, B.; Olaiya, E. O.; Roethel, W.; Wilson, F. F.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Alwyn, K. E.; Barlow, N. R.; Barlow, R. J.; Chia, Y. M.; Edgar, C. L.; Lafferty, G. D.; West, T. J.; Yi, J. I.] Univ Manchester, Manchester M13 9PL, Lancs, England.
[Bevan, A. J.; George, K. A.; Di Lodovico, F.; Sacco, R.; Sigamani, M.] Univ London, London E1 4NS, England.
[Arnaud, N.; Bequilleux, J.; D'Orazio, A.; Davier, M.; Fermino da Costa, J.; Grosdidier, G.; Hoecker, A.; Lepeltier, V.; Le Diberder, F.; Lutz, A. M.; Pruvot, S.; Roudeau, P.; Schune, M. H.; Serrano, J.; Sordini, V.; Stocchi, A.; Wormser, G.; Lange, D. J.] Univ Paris 11, Ctr Sci Orsay, F-91898 Orsay, France.
[Bard, D. J.; Dauncey, P. D.; Nash, J. A.; Vazquez, W. Panduro; Tibbetts, M.] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
[Walker, D.] Univ Bristol, Bristol BS8 1TL, Avon, England.
[Hawkes, C. M.; Soni, N.; Watson, A. T.] Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
[Battaglia, M.; Brown, D. N.; Cahn, R. N.; Jacobsen, R. G.; Kerth, L. T.; Kolomensky, Yu. G.; Kukartsev, G.; Lynch, G.; Osipenkov, I. L.; Ronan, M. T.; Tackmann, K.; Tanabe, T.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.] Univ Savoie, F-74941 Annecy Le Vieux, France.
RP Aubert, B (reprint author), IN2P3 CNRS, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
RI 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; 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; Luppi, Eleonora/A-4902-2015; White,
Ryan/E-2979-2015; Calabrese, Roberto/G-4405-2015; Patrignani,
Claudia/C-5223-2009; 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; Monge, Maria Roberta/G-9127-2012; Oyanguren,
Arantza/K-6454-2014
OI 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; 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; Raven, Gerhard/0000-0002-2897-5323; Luppi,
Eleonora/0000-0002-1072-5633; White, Ryan/0000-0003-3589-5900;
Calabrese, Roberto/0000-0002-1354-5400; Patrignani,
Claudia/0000-0002-5882-1747; 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; Monge,
Maria Roberta/0000-0003-1633-3195; Oyanguren,
Arantza/0000-0002-8240-7300
FU U. S. Department of Energy and 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); Marie-Curie IEF program (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, the 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 36
TC 29
Z9 29
U1 0
U2 4
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 DEC
PY 2008
VL 78
IS 11
AR 112003
DI 10.1103/PhysRevD.78.112003
PG 18
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200009
ER
PT J
AU Aubert, B
Bona, M
Karyotakis, Y
Lees, JP
Poireau, V
Prencipe, E
Prudent, X
Tisserand, V
Tico, JG
Grauges, E
Lopez, L
Palano, A
Pappagallo, M
Eigen, G
Stugu, B
Sun, L
Abrams, GS
Battaglia, M
Brown, DN
Cahn, RN
Jacobsen, RG
Kerth, LT
Kolomensky, YG
Kukartsev, G
Lynch, G
Osipenkov, IL
Ronan, MT
Tackmann, K
Tanabe, T
Hawkes, CM
Soni, N
Watson, AT
Koch, H
Schroeder, T
Walker, D
Asgeirsson, DJ
Fulsom, BG
Hearty, C
Mattison, TS
McKenna, JA
Barrett, M
Khan, A
Teodorescu, L
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
Abachi, S
Buchanan, C
Gary, JW
Liu, F
Long, O
Shen, BC
Vitug, GM
Yasin, Z
Zhang, L
Sharma, V
Campagnari, C
Hong, TM
Kovalskyi, D
Mazur, MA
Richman, JD
Beck, TW
Eisner, AM
Flacco, CJ
Heusch, CA
Kroseberg, J
Lockman, WS
Schalk, T
Schumm, BA
Seiden, A
Wang, L
Wilson, MG
Winstrom, LO
Cheng, CH
Doll, DA
Echenard, B
Fang, F
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Andreassen, R
Mancinelli, G
Meadows, BT
Mishra, K
Sokoloff, MD
Bloom, PC
Ford, WT
Gaz, A
Hirschauer, JF
Kreisel, A
Nagel, M
Nauenberg, U
Smith, JG
Ulmer, KA
Wagner, SR
Ayad, R
Soffer, A
Toki, WH
Wilson, RJ
Altenburg, DD
Feltresi, E
Hauke, A
Jasper, H
Karbach, M
Merkel, J
Petzold, A
Spaan, B
Wacker, K
Kobel, MJ
Mader, WF
Nogowski, R
Schubert, KR
Schwierz, R
Sundermann, JE
Volk, A
Bernard, D
Bonneaud, GR
Latour, E
Thiebaux, C
Verderi, M
Clark, PJ
Gradl, W
Playfer, S
Watson, JE
Andreotti, M
Bettoni, D
Bozzi, C
Calabrese, R
Cecchi, A
Cibinetto, G
Franchini, P
Luppi, E
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
Buzzo, A
Contri, R
Lo Vetere, M
Macri, MM
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Chaisanguanthum, KS
Morii, M
Marks, J
Schenk, S
Uwer, U
Klose, V
Lacker, HM
Bard, DJ
Dauncey, PD
Nash, JA
Vazquez, WP
Tibbetts, M
Behera, PK
Chai, X
Charles, MJ
Mallik, U
Cochran, J
Crawley, HB
Dong, L
Meyer, WT
Prell, S
Rosenberg, EI
Rubin, AE
Gao, YY
Gritsan, AV
Guo, ZJ
Lae, CK
Denig, AG
Fritsch, M
Schott, G
Arnaud, N
Bequilleux, J
D'Orazio, A
Davier, M
da Costa, JF
Grosdidier, G
Hocker, A
Lepeltier, V
Le Diberder, F
Lutz, AM
Pruvot, S
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
George, KA
Di Lodovico, F
Sacco, R
Sigamani, M
Cowan, G
Flaecher, HU
Hopkins, DA
Paramesvaran, S
Salvatore, F
Wren, AC
Brown, DN
Davis, CL
Alwyn, KE
Bailey, DS
Barlow, RJ
Chia, YM
Edgar, CL
Lafferty, GD
West, TJ
Yi, JI
Anderson, J
Chen, C
Jawahery, A
Roberts, DA
Simi, G
Tuggle, JM
Dallapiccola, C
Li, X
Salvati, E
Saremi, S
Cowan, R
Dujmic, D
Fisher, PH
Koeneke, K
Sciolla, G
Spitznagel, M
Taylor, F
Yamamoto, RK
Zhao, M
Patel, PM
Robertson, SH
Lazzaro, A
Lombardo, V
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Sanders, DA
Summers, DJ
Zhao, HW
Simard, M
Taras, P
Viaud, FB
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
Benelli, G
Corwin, LA
Honscheid, K
Kagan, H
Kass, R
Morris, JP
Rahimi, AM
Regensburger, JJ
Sekula, SJ
Wong, QK
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
Briand, H
Calderini, G
Chauveau, J
David, P
Del Buono, L
Hamon, O
Leruste, P
Ocariz, J
Perez, A
Prendki, J
Gladney, L
Biasini, M
Covarelli, R
Manoni, E
Angelini, C
Batignani, G
Bettarini, S
Carpinelli, M
Cervelli, A
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Morganti, M
Neri, N
Paoloni, E
Rizzo, G
Walsh, JJ
Biesiada, J
Pegna, DL
Lu, C
Olsen, J
Smith, AJS
Telnov, AV
Anulli, F
Baracchini, E
Cavoto, G
del Re, D
Di Marco, E
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Jackson, PD
Gioi, LL
Mazzoni, MA
Morganti, S
Piredda, G
Polci, F
Renga, F
Voena, C
Ebert, M
Hartmann, T
Schroder, H
Waldi, R
Adye, T
Franek, B
Olaiya, EO
Roethel, W
Wilson, FF
Emery, S
Escalier, M
Esteve, L
Gaidot, A
Ganzhur, SF
de Monchenault, GH
Kozanecki, W
Vasseur, G
Yeche, C
Zito, M
Chen, XR
Liu, H
Park, W
Purohit, MV
White, RM
Wilson, JR
Allen, MT
Aston, D
Bartoldus, R
Bechtle, P
Benitez, JF
Cenci, R
Coleman, JP
Convery, MR
Dingfelder, JC
Dorfan, J
Dubois-Felsmann, GP
Dunwoodie, W
Field, RC
Gabareen, AM
Gowdy, SJ
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
Perazzo, A
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
Yi, K
Young, CC
Ziegler, V
Burchat, PR
Edwards, AJ
Majewski, SA
Miyashita, TS
Petersen, BA
Wilden, L
Ahmed, S
Alam, MS
Ernst, JA
Pan, B
Saeed, MA
Zain, SB
Spanier, SM
Wogsland, BJ
Eckmann, R
Ritchie, JL
Ruland, AM
Schilling, CJ
Schwitters, RF
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
Kowalewski, R
Lewczuk, MJ
Nugent, IM
Roney, JM
Sobie, RJ
Gershon, TJ
Harrison, PF
Ilic, J
Latham, TE
Mohanty, GB
Band, HR
Chen, X
Dasu, S
Flood, KT
Pan, Y
Pierini, M
Prepost, R
Vuosalo, CO
Wu, SL
AF Aubert, B.
Bona, M.
Karyotakis, Y.
Lees, J. P.
Poireau, V.
Prencipe, E.
Prudent, X.
Tisserand, V.
Tico, J. Garra
Grauges, E.
Lopez, L.
Palano, A.
Pappagallo, M.
Eigen, G.
Stugu, B.
Sun, L.
Abrams, G. S.
Battaglia, M.
Brown, D. N.
Cahn, R. N.
Jacobsen, R. G.
Kerth, L. T.
Kolomensky, Yu. G.
Kukartsev, G.
Lynch, G.
Osipenkov, I. L.
Ronan, M. T.
Tackmann, K.
Tanabe, T.
Hawkes, C. M.
Soni, N.
Watson, A. T.
Koch, H.
Schroeder, T.
Walker, D.
Asgeirsson, D. J.
Fulsom, B. G.
Hearty, C.
Mattison, T. S.
McKenna, J. A.
Barrett, M.
Khan, A.
Teodorescu, L.
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.
Abachi, S.
Buchanan, C.
Gary, J. W.
Liu, F.
Long, O.
Shen, B. C.
Vitug, G. M.
Yasin, Z.
Zhang, L.
Sharma, V.
Campagnari, C.
Hong, T. M.
Kovalskyi, D.
Mazur, M. A.
Richman, J. D.
Beck, T. W.
Eisner, A. M.
Flacco, C. J.
Heusch, C. A.
Kroseberg, J.
Lockman, W. S.
Schalk, T.
Schumm, B. A.
Seiden, A.
Wang, L.
Wilson, M. G.
Winstrom, L. O.
Cheng, C. H.
Doll, D. A.
Echenard, B.
Fang, F.
Hitlin, D. G.
Narsky, I.
Piatenko, T.
Porter, F. C.
Andreassen, R.
Mancinelli, G.
Meadows, B. T.
Mishra, K.
Sokoloff, M. D.
Bloom, P. C.
Ford, W. T.
Gaz, A.
Hirschauer, J. F.
Kreisel, A.
Nagel, M.
Nauenberg, U.
Smith, J. G.
Ulmer, K. A.
Wagner, S. R.
Ayad, R.
Soffer, A.
Toki, W. H.
Wilson, R. J.
Altenburg, D. D.
Feltresi, E.
Hauke, A.
Jasper, H.
Karbach, M.
Merkel, J.
Petzold, A.
Spaan, B.
Wacker, K.
Kobel, M. J.
Mader, W. F.
Nogowski, R.
Schubert, K. R.
Schwierz, R.
Sundermann, J. E.
Volk, A.
Bernard, D.
Bonneaud, G. R.
Latour, E.
Thiebaux, Ch.
Verderi, M.
Clark, P. J.
Gradl, W.
Playfer, S.
Watson, J. E.
Andreotti, M.
Bettoni, D.
Bozzi, C.
Calabrese, R.
Cecchi, A.
Cibinetto, G.
Franchini, P.
Luppi, E.
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.
Buzzo, A.
Contri, R.
Lo Vetere, M.
Macri, M. M.
Monge, M. R.
Passaggio, S.
Patrignani, C.
Robutti, E.
Santroni, A.
Tosi, S.
Chaisanguanthum, K. S.
Morii, M.
Marks, J.
Schenk, S.
Uwer, U.
Klose, V.
Lacker, H. M.
Bard, D. J.
Dauncey, P. D.
Nash, J. A.
Vazquez, W. Panduro
Tibbetts, M.
Behera, P. K.
Chai, X.
Charles, M. J.
Mallik, U.
Cochran, J.
Crawley, H. B.
Dong, L.
Meyer, W. T.
Prell, S.
Rosenberg, E. I.
Rubin, A. E.
Gao, Y. Y.
Gritsan, A. V.
Guo, Z. J.
Lae, C. K.
Denig, A. G.
Fritsch, M.
Schott, G.
Arnaud, N.
Bequilleux, J.
D'Orazio, A.
Davier, M.
da Costa, J. Firmino
Grosdidier, G.
Hoecker, A.
Lepeltier, V.
Le Diberder, F.
Lutz, A. M.
Pruvot, S.
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.
George, K. A.
Di Lodovico, F.
Sacco, R.
Sigamani, M.
Cowan, G.
Flaecher, H. U.
Hopkins, D. A.
Paramesvaran, S.
Salvatore, F.
Wren, A. C.
Brown, D. N.
Davis, C. L.
Alwyn, K. E.
Bailey, D. S.
Barlow, R. J.
Chia, Y. M.
Edgar, C. L.
Lafferty, G. D.
West, T. J.
Yi, J. I.
Anderson, J.
Chen, C.
Jawahery, A.
Roberts, D. A.
Simi, G.
Tuggle, J. M.
Dallapiccola, C.
Li, X.
Salvati, E.
Saremi, S.
Cowan, R.
Dujmic, D.
Fisher, P. H.
Koeneke, K.
Sciolla, G.
Spitznagel, M.
Taylor, F.
Yamamoto, R. K.
Zhao, M.
Patel, P. M.
Robertson, S. H.
Lazzaro, A.
Lombardo, V.
Palombo, F.
Bauer, J. M.
Cremaldi, L.
Eschenburg, V.
Godang, R.
Kroeger, R.
Sanders, D. A.
Summers, D. J.
Zhao, H. W.
Simard, M.
Taras, P.
Viaud, F. B.
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.
Benelli, G.
Corwin, L. A.
Honscheid, K.
Kagan, H.
Kass, R.
Morris, J. P.
Rahimi, A. M.
Regensburger, J. J.
Sekula, S. J.
Wong, Q. K.
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.
del Amo Sanchez, P.
Ben-Haim, E.
Briand, H.
Calderini, G.
Chauveau, J.
David, P.
Del Buono, L.
Hamon, O.
Leruste, Ph.
Ocariz, J.
Perez, A.
Prendki, J.
Gladney, L.
Biasini, M.
Covarelli, R.
Manoni, E.
Angelini, C.
Batignani, G.
Bettarini, S.
Carpinelli, M.
Cervelli, A.
Forti, F.
Giorgi, M. A.
Lusiani, A.
Marchiori, G.
Morganti, M.
Neri, N.
Paoloni, E.
Rizzo, G.
Walsh, J. J.
Biesiada, J.
Pegna, D. Lopes
Lu, C.
Olsen, J.
Smith, A. J. S.
Telnov, A. V.
Anulli, F.
Baracchini, E.
Cavoto, G.
del Re, D.
Di Marco, E.
Faccini, R.
Ferrarotto, F.
Ferroni, F.
Gaspero, M.
Jackson, P. D.
Gioi, L. Li
Mazzoni, M. A.
Morganti, S.
Piredda, G.
Polci, F.
Renga, F.
Voena, C.
Ebert, M.
Hartmann, T.
Schroeder, H.
Waldi, R.
Adye, T.
Franek, B.
Olaiya, E. O.
Roethel, W.
Wilson, F. F.
Emery, S.
Escalier, M.
Esteve, L.
Gaidot, A.
Ganzhur, S. F.
de Monchenault, G. Hamel
Kozanecki, W.
Vasseur, G.
Yeche, Ch.
Zito, M.
Chen, X. R.
Liu, H.
Park, W.
Purohit, M. V.
White, R. M.
Wilson, J. R.
Allen, M. T.
Aston, D.
Bartoldus, R.
Bechtle, P.
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.
Gabareen, A. M.
Gowdy, S. J.
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.
Perazzo, A.
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.
Yi, K.
Young, C. C.
Ziegler, V.
Burchat, P. R.
Edwards, A. J.
Majewski, S. A.
Miyashita, T. S.
Petersen, B. A.
Wilden, L.
Ahmed, S.
Alam, M. S.
Ernst, J. A.
Pan, B.
Saeed, M. A.
Zain, S. B.
Spanier, S. M.
Wogsland, B. J.
Eckmann, R.
Ritchie, J. L.
Ruland, A. M.
Schilling, C. J.
Schwitters, R. F.
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.
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.
Band, H. R.
Chen, X.
Dasu, S.
Flood, K. T.
Pan, Y.
Pierini, M.
Prepost, R.
Vuosalo, C. O.
Wu, S. L.
CA BABAR Collaboration
TI Study of hadronic transitions between Y states and observation of Y(4S)
-> eta Y(1S) decay
SO PHYSICAL REVIEW D
LA English
DT Article
ID HARD-PHOTON-EMISSION
AB We present a study of hadronic transitions between Y(mS) (m = 4, 3, 2) and Y(nS) (n = 2, 1) resonances based on 347.5 fb(-1) of data taken with the BABAR detector at the PEP-II storage rings. We report the first observation of Y(4S) -> eta Y(1S) decay with a branching fraction B(Y(4S) -> eta Y(1S) = (1.96 +/- 0.06(stat) +/- 0.09(syst)) X 10(-4) and measure the ratio of partial widths Gamma(Y(4S) -> eta Y(1S))/Gamma(Y(4S) -> pi(+)pi(-)Y(1S)) = 2.41 +/- 0.40(stat) +/- 0.12(syst). We set 90% CL upper limits on the ratios Gamma(Y(2S) -> eta Y(1S))/Gamma(Y(2S) -> pi(+)pi(-)Y(1S) < 5.2 X 10(-3) and Gamma(Y(3S) -> eta Y(1S)/Gamma(Y(3S) -> pi(+)pi(-)Y(1S)) < 1.9 X 10(-2). We also present new measurements of the ratios Gamma(Y(4S) -> pi(+)pi(-)Y(2S)/Gamma(Y(4S) -> pi(+)pi(-)Y(1S)) = 1.16 +/- 0.16(stat) +/- 0.14(syst) and Gamma(Y(3S) -> pi(+)pi(-)Y(1S)) = 0.577 +/- 0.026(stat) +/- 0.060(syst).
C1 [Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.] IN2P3 CNRS, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
[Tico, J. Garra; Grauges, E.] Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain.
[Lopez, L.; Palano, A.; Pappagallo, M.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[Lopez, L.; 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.
[Abrams, G. S.; Battaglia, M.; Brown, D. N.; Cahn, R. N.; Jacobsen, R. G.; Kerth, L. T.; Kolomensky, Yu. G.; Kukartsev, G.; Lynch, G.; Osipenkov, I. L.; Ronan, M. T.; Tackmann, K.; Tanabe, T.; Soni, N.; Watson, A. T.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Hawkes, C. M.; Koch, H.; Schroeder, T.] Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany.
[Asgeirsson, D. J.; Fulsom, B. G.; Hearty, C.; Mattison, T. S.; McKenna, J. A.] Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
[Barrett, M.; Khan, A.; Teodorescu, L.] 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.
[Abachi, S.; Buchanan, C.] Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
[Gary, J. W.; Liu, F.; Long, O.; Shen, B. C.; Vitug, G. M.; Yasin, Z.; Zhang, L.] Univ Calif Riverside, Riverside, CA 92521 USA.
[Sharma, V.] Univ Calif San Diego, San Diego, 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.; Flacco, C. J.; Heusch, C. A.; Kroseberg, J.; Lockman, W. S.; Schalk, T.; Schumm, B. A.; Seiden, A.; Wang, L.; Wilson, M. G.; Winstrom, L. O.] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA.
[Cheng, C. H.; Doll, D. A.; Echenard, B.; Fang, F.; Hitlin, D. G.; Narsky, I.; Piatenko, T.; Porter, F. C.] CALTECH, Pasadena, CA 91125 USA.
[Andreassen, R.; 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.; Kreisel, A.; Nagel, M.; Nauenberg, U.; Smith, J. G.; Ulmer, K. A.; Wagner, S. R.] Univ Colorado, Boulder, CO 80309 USA.
[Ayad, R.; Soffer, A.; Toki, W. H.; Wilson, R. J.] Colorado State Univ, Ft Collins, CO 80523 USA.
[Altenburg, D. D.; Feltresi, E.; Hauke, A.; Jasper, H.; Karbach, M.; Merkel, J.; Petzold, A.; Spaan, B.; Wacker, K.] Tech Univ Dortmund, Fak Phys, D-44221 Dortmund, Germany.
[Kobel, M. J.; Mader, W. F.; Nogowski, R.; Schubert, K. R.; Schwierz, R.; Sundermann, J. E.; Volk, A.] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
[Bernard, D.; Bonneaud, G. R.; Latour, E.; Thiebaux, Ch.; Verderi, M.] Ecole Polytech, CNRS IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
[Clark, P. J.; Gradl, W.; Playfer, S.; Watson, J. E.] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
[Andreotti, M.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cecchi, A.; Cibinetto, G.; Franchini, P.; Luppi, E.; 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.; Franchini, P.; Luppi, E.; 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, Lab Nazl Frascati, I-00044 Frascati, Italy.
[Buzzo, A.; Contri, R.; Lo Vetere, M.; Macri, M. M.; Monge, M. R.; Passaggio, S.; Patrignani, C.; Robutti, E.; Santroni, A.; Tosi, S.] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy.
[Contri, R.; Lo Vetere, M.; Monge, M. R.; Patrignani, C.; Santroni, A.; Tosi, S.] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy.
[Chaisanguanthum, K. S.; Morii, M.] Harvard Univ, Cambridge, MA 02138 USA.
[Marks, J.; Schenk, S.; Uwer, U.] Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany.
[Klose, V.; Lacker, H. M.] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany.
[Behera, P. K.; Chai, X.; Charles, M. J.; Mallik, U.] Univ Iowa, Iowa City, IA 52242 USA.
[Cochran, J.; Crawley, H. B.; Dong, L.; 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.; Lae, C. K.] Johns Hopkins Univ, Baltimore, MD 21218 USA.
[Denig, A. G.; Fritsch, M.; Schott, G.] Univ Karlsruhe, Inst Expt Kernphys, D-76021 Karlsruhe, Germany.
[Arnaud, N.; Bequilleux, J.; D'Orazio, A.; Davier, M.; da Costa, J. Firmino; Grosdidier, G.; Hoecker, A.; Lepeltier, V.; Le Diberder, F.; Lutz, A. M.; Pruvot, S.; Roudeau, P.; Schune, M. H.; Serrano, J.; Sordini, V.; Stocchi, A.; Wormser, G.] IN2P3 CNRS, 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.
[Cowan, G.; Flaecher, H. U.; Hopkins, D. A.; Paramesvaran, S.; Salvatore, F.; 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.
[Anderson, J.; Chen, C.; Jawahery, A.; Roberts, D. A.; Simi, G.; Tuggle, J. M.] Univ Maryland, College Pk, MD 20742 USA.
[Dallapiccola, C.; Li, X.; Salvati, E.; Saremi, S.] Univ Massachusetts, Amherst, MA 01003 USA.
[Cowan, R.; Dujmic, D.; Fisher, P. H.; Koeneke, K.; Sciolla, G.; Spitznagel, M.; Taylor, F.; Yamamoto, R. K.; Zhao, M.] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
[Patel, P. M.; Robertson, S. H.] McGill Univ, Montreal, PQ H3A 2T8, Canada.
[Lazzaro, A.; Lombardo, V.; Palombo, F.] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy.
[Buzzo, A.; Lazzaro, A.] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
[Bauer, J. M.; Cremaldi, L.; Eschenburg, V.; Godang, R.; Kroeger, R.; Sanders, D. A.; Summers, D. J.; Zhao, H. W.] Univ Mississippi, University, MS 38677 USA.
[Simard, M.; Taras, P.; Viaud, F. B.] Univ Montreal, Montreal, PQ H3C 3J7, Canada.
[Nicholson, H.] Mt Holyoke Coll, S Hadley, MA 01075 USA.
[De Nardo, G.; Lista, L.] Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy.
[De Nardo, G.; Monorchio, D.; Onorato, G.; Sciacca, C.] Univ Naples Federico 2, Dipartimento Sci Fisiche, 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.
[Benelli, G.; Corwin, L. A.; Honscheid, K.; Kagan, H.; Kass, R.; Morris, J. P.; Rahimi, A. M.; Regensburger, J. J.; Sekula, S. J.; Wong, Q. K.] 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.
[del Amo Sanchez, P.; Ben-Haim, E.; Briand, H.; Calderini, G.; Chauveau, J.; David, P.; Del Buono, L.; Hamon, O.; Leruste, Ph.; Ocariz, J.; Perez, A.; Prendki, J.] Univ Paris 07, Univ Paris 06, CNRS IN2P3, Lab Phys Nucl Hautes Energies, F-75252 Paris, France.
[Gladney, L.] Univ Penn, Philadelphia, PA 19104 USA.
[Biasini, M.; Covarelli, R.; Manoni, E.] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy.
[Biasini, M.; Covarelli, R.; Manoni, E.] Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
[Angelini, C.; Batignani, G.; Bettarini, S.; Carpinelli, M.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Lusiani, A.; Marchiori, G.; 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.; Carpinelli, M.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Marchiori, G.; 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.
[Biesiada, J.; 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.; del Re, D.; Di Marco, E.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Jackson, P. D.; Gioi, L. Li; Mazzoni, M. A.; Morganti, S.; Piredda, G.; Polci, F.; Renga, F.; Voena, C.] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy.
[Baracchini, E.; del Re, D.; Di Marco, E.; Faccini, R.; Ferroni, F.; Gaspero, M.; Polci, F.; 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.
[Emery, S.; Escalier, M.; Esteve, L.; Gaidot, A.; Ganzhur, S. F.; de Monchenault, G. Hamel; Kozanecki, W.; Vasseur, G.; Yeche, Ch.; Zito, M.] CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France.
[Chen, X. R.; Liu, H.; Park, W.; Purohit, M. V.; White, R. M.; Wilson, J. R.] Univ S Carolina, Columbia, SC 29208 USA.
[Allen, M. T.; Aston, D.; Bartoldus, R.; Bechtle, P.; 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.; Gabareen, A. M.; Gowdy, S. J.; 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.; Perazzo, A.; 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.; Yi, K.; Young, C. C.; Ziegler, V.] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
[Burchat, P. R.; Edwards, A. J.; Majewski, S. A.; Miyashita, T. S.; Petersen, B. A.; Wilden, L.] 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.
[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.] Univ Texas Austin, Austin, TX 78712 USA.
[Drummond, B. W.; Izen, J. M.; Lou, X. C.] Univ Texas Dallas, Dallas, 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 Torino, 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, Dipartimento Fis, I-34127 Trieste, Italy.
[Azzolini, V.; Lopez-March, N.; Martinez-Vidal, F.; Milanes, D. A.; Oyanguren, A.] Univ Valencia, IFIC, CSIC, E-46071 Valencia, Spain.
[Albert, J.; Banerjee, Sw.; Bhuyan, B.; Choi, H. H. F.; Hamano, K.; 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.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
[Band, H. R.; Chen, X.; Dasu, S.; Flood, K. T.; Pan, Y.; Pierini, M.; Prepost, R.; Vuosalo, C. O.; Wu, S. L.] Univ Wisconsin, Madison, WI 53706 USA.
[Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.] Univ Savoie, F-74941 Annecy Le Vieux, France.
[Abrams, G. S.; Battaglia, M.; Brown, D. N.; Cahn, R. N.; Jacobsen, R. G.; Kolomensky, Yu. G.; Kukartsev, G.; Lynch, G.; Osipenkov, I. L.; Ronan, M. T.; Tackmann, K.; Tanabe, T.; Soni, N.; Watson, A. T.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Hawkes, C. M.] Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
[Walker, D.] Univ Bristol, Bristol BS8 1TL, Avon, England.
[Bard, D. J.; Dauncey, P. D.; Nash, J. A.; Vazquez, W. Panduro; Tibbetts, M.] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
[Arnaud, N.; Bequilleux, J.; D'Orazio, A.; Davier, M.; da Costa, J. Firmino; Grosdidier, G.; Hoecker, A.; Lepeltier, V.; Le Diberder, F.; Lutz, A. M.; Pruvot, S.; Roudeau, P.; Schune, M. H.; Serrano, J.; Sordini, V.; Stocchi, A.; Wormser, G.] Univ Paris 11, Ctr Sci Orsay, F-91898 Orsay, France.
[Bevan, A. J.; Clarke, C. K.; George, K. A.; Di Lodovico, F.; Sacco, R.; Sigamani, M.] Univ London, London E1 4NS, England.
[Sacco, R.; Sigamani, M.; Alwyn, K. E.; Bailey, D. S.; Barlow, R. J.; Chia, Y. M.] Univ Manchester, Manchester M13 9PL, Lancs, England.
[Adye, T.; Franek, B.; Olaiya, E. O.; Roethel, W.; Wilson, F. F.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Carpinelli, M.] Univ Sassari, Sassari, Italy.
RP Aubert, B (reprint author), IN2P3 CNRS, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
RI Della Ricca, Giuseppe/B-6826-2013; Negrini, Matteo/C-8906-2014; Monge,
Maria Roberta/G-9127-2012; Oyanguren, Arantza/K-6454-2014; Luppi,
Eleonora/A-4902-2015; White, Ryan/E-2979-2015; Patrignani,
Claudia/C-5223-2009; 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; Calabrese,
Roberto/G-4405-2015; 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; Di Lodovico, Francesca/L-9109-2016; Pappagallo,
Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey,
Raymond/E-2830-2016
OI Raven, Gerhard/0000-0002-2897-5323; Della Ricca,
Giuseppe/0000-0003-2831-6982; Negrini, Matteo/0000-0003-0101-6963;
Monge, Maria Roberta/0000-0003-1633-3195; Oyanguren,
Arantza/0000-0002-8240-7300; Luppi, Eleonora/0000-0002-1072-5633; White,
Ryan/0000-0003-3589-5900; Patrignani, Claudia/0000-0002-5882-1747; 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;
Calabrese, Roberto/0000-0002-1354-5400; 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; 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
NR 23
TC 25
Z9 25
U1 0
U2 7
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 DEC
PY 2008
VL 78
IS 11
AR 112002
DI 10.1103/PhysRevD.78.112002
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200008
ER
PT J
AU Aubert, B
Bona, M
Karyotakis, Y
Lees, JP
Poireau, V
Prencipe, E
Prudent, X
Tisserand, V
Tico, JG
Grauges, E
Lopez, L
Palano, A
Pappagallo, M
Eigen, G
Stugu, B
Sun, L
Abrams, GS
Battaglia, M
Brown, DN
Cahn, RN
Jacobsen, RG
Kerth, LT
Kolomensky, YG
Lynch, G
Osipenkov, IL
Ronan, MT
Tackmann, K
Tanabe, T
Hawkes, CM
Soni, N
Watson, AT
Koch, H
Schroeder, T
Walker, D
Asgeirsson, DJ
Fulsom, BG
Hearty, C
Mattison, TS
McKenna, JA
Barrett, M
Khan, 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
Abachi, S
Buchanan, C
Gary, JW
Liu, F
Long, O
Shen, BC
Vitug, GM
Yasin, Z
Zhang, L
Sharma, V
Campagnari, C
Hong, TM
Kovalskyi, D
Mazur, MA
Richman, JD
Beck, TW
Eisner, AM
Flacco, CJ
Heusch, CA
Kroseberg, J
Lockman, WS
Martinez, AJ
Schalk, T
Schumm, BA
Seiden, A
Wang, L
Wilson, MG
Winstrom, LO
Cheng, CH
Doll, DA
Echenard, B
Fang, F
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Andreassen, R
Mancinelli, G
Meadows, BT
Mishra, K
Sokoloff, MD
Bloom, PC
Ford, WT
Gaz, A
Hirschauer, JF
Nagel, M
Nauenberg, U
Smith, JG
Ulmer, KA
Wagner, SR
Ayad, R
Soffer, A
Toki, WH
Wilson, RJ
Altenburg, DD
Feltresi, E
Hauke, A
Jasper, H
Karbach, M
Merkel, J
Petzold, A
Spaan, B
Wacker, K
Kobel, MJ
Mader, WF
Nogowski, R
Schubert, KR
Schwierz, R
Sundermann, JE
Volk, A
Bernard, D
Bonneaud, GR
Latour, E
Thiebaux, C
Verderi, M
Clark, PJ
Gradl, W
Playfer, S
Watson, JE
Andreotti, M
Bettoni, D
Bozzi, C
Calabrese, R
Cecchi, A
Cibinetto, G
Franchini, P
Luppi, E
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
Buzzo, A
Contri, R
Lo Vetere, M
Macri, MM
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Chaisanguanthum, KS
Morii, M
Marks, J
Schenk, S
Uwer, U
Klose, V
Lacker, HM
Bard, DJ
Dauncey, PD
Nash, JA
Vazquez, WP
Tibbetts, M
Behera, PK
Chai, X
Charles, MJ
Mallik, U
Cochran, J
Crawley, HB
Dong, L
Meyer, WT
Prell, S
Rosenberg, EI
Rubin, AE
Gao, YY
Gritsan, AV
Guo, ZJ
Lae, CK
Denig, AG
Fritsch, M
Schott, G
Arnaud, N
Bequilleux, J
D'Orazio, A
Davier, M
da Costa, JF
Grosdidier, G
Hocker, A
Lepeltier, V
Le Diberder, F
Lutz, AM
Pruvot, S
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
George, KA
Di Lodovico, F
Sacco, R
Sigamani, M
Cowan, G
Flaecher, HU
Hopkins, DA
Paramesvaran, S
Salvatore, F
Wren, AC
Brown, DN
Davis, CL
Alwyn, KE
Bailey, D
Barlow, RJ
Chia, YM
Edgar, CL
Jackson, G
Lafferty, GD
West, TJ
Yi, JI
Anderson, J
Chen, C
Jawahery, A
Roberts, DA
Simi, G
Tuggle, JM
Dallapiccola, C
Li, X
Salvati, E
Saremi, S
Cowan, R
Dujmic, D
Fisher, PH
Koeneke, K
Sciolla, G
Spitznagel, M
Taylor, F
Yamamoto, RK
Zhao, M
Patel, PM
Robertson, SH
Lazzaro, A
Lombardo, V
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Sanders, DA
Summers, DJ
Zhao, HW
Simard, M
Taras, P
Viaud, FB
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
Benelli, G
Corwin, LA
Honscheid, K
Kagan, H
Kass, R
Morris, JP
Rahimi, AM
Regensburger, JJ
Sekula, SJ
Wong, QK
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
Briand, H
Calderini, G
Chauveau, J
David, P
Del Buono, L
Hamon, O
Leruste, P
Ocariz, J
Perez, A
Prendki, J
Sitt, S
Gladney, L
Biasini, M
Covarelli, R
Manoni, E
Angelini, C
Batignani, G
Bettarini, S
Carpinelli, M
Cervelli, A
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
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
del Re, D
Di Marco, E
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Jackson, PD
Gioi, LL
Mazzoni, MA
Morganti, S
Piredda, G
Polci, F
Renga, F
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Hartmann, T
Schroder, H
Waldi, R
Adye, T
Franek, B
Olaiya, EO
Wilson, FF
Emery, S
Escalier, M
Esteve, L
Ganzhur, SF
de Monchenault, GH
Kozanecki, W
Vasseur, G
Yeche, C
Zito, M
Chen, XR
Liu, H
Park, W
Purohit, MV
White, RM
Wilson, JR
Allen, MT
Aston, D
Bartoldus, R
Bechtle, P
Benitez, JF
Cenci, R
Coleman, JP
Convery, MR
Dingfelder, JC
Dorfan, J
Dubois-Felsmann, GP
Dunwoodie, W
Field, RC
Gabareen, AM
Gowdy, SJ
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
Perazzo, A
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
Yi, K
Young, CC
Ziegler, V
Burchat, PR
Edwards, AJ
Majewski, SA
Miyashita, TS
Petersen, BA
Wilden, L
Ahmed, S
Alam, MS
Ernst, JA
Pan, B
Saeed, MA
Zain, SB
Spanier, SM
Wogsland, BJ
Eckmann, R
Ritchie, JL
Ruland, AM
Schilling, CJ
Schwitters, RF
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
Kowalewski, R
Lewczuk, MJ
Nugent, IM
Roney, JM
Sobie, RJ
Gershon, TJ
Harrison, PF
Ilic, J
Latham, TE
Mohanty, GB
Band, HR
Chen, X
Dasu, S
Flood, KT
Pan, Y
Pierini, M
Prepost, R
Vuosalo, CO
Wu, SL
AF Aubert, B.
Bona, M.
Karyotakis, Y.
Lees, J. P.
Poireau, V.
Prencipe, E.
Prudent, X.
Tisserand, V.
Tico, J. Garra
Grauges, E.
Lopez, L.
Palano, A.
Pappagallo, M.
Eigen, G.
Stugu, B.
Sun, L.
Abrams, G. S.
Battaglia, M.
Brown, D. N.
Cahn, R. N.
Jacobsen, R. G.
Kerth, L. T.
Kolomensky, Yu. G.
Lynch, G.
Osipenkov, I. L.
Ronan, M. T.
Tackmann, K.
Tanabe, T.
Hawkes, C. M.
Soni, N.
Watson, A. T.
Koch, H.
Schroeder, T.
Walker, D.
Asgeirsson, D. J.
Fulsom, B. G.
Hearty, C.
Mattison, T. S.
McKenna, J. A.
Barrett, M.
Khan, 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.
Abachi, S.
Buchanan, C.
Gary, J. W.
Liu, F.
Long, O.
Shen, B. C.
Vitug, G. M.
Yasin, Z.
Zhang, L.
Sharma, V.
Campagnari, C.
Hong, T. M.
Kovalskyi, D.
Mazur, M. A.
Richman, J. D.
Beck, T. W.
Eisner, A. M.
Flacco, C. J.
Heusch, C. A.
Kroseberg, J.
Lockman, W. S.
Martinez, A. J.
Schalk, T.
Schumm, B. A.
Seiden, A.
Wang, L.
Wilson, M. G.
Winstrom, L. O.
Cheng, C. H.
Doll, D. A.
Echenard, B.
Fang, F.
Hitlin, D. G.
Narsky, I.
Piatenko, T.
Porter, F. C.
Andreassen, R.
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.
Ulmer, K. A.
Wagner, S. R.
Ayad, R.
Soffer, A.
Toki, W. H.
Wilson, R. J.
Altenburg, D. D.
Feltresi, E.
Hauke, A.
Jasper, H.
Karbach, M.
Merkel, J.
Petzold, A.
Spaan, B.
Wacker, K.
Kobel, M. J.
Mader, W. F.
Nogowski, R.
Schubert, K. R.
Schwierz, R.
Sundermann, J. E.
Volk, A.
Bernard, D.
Bonneaud, G. R.
Latour, E.
Thiebaux, Ch.
Verderi, M.
Clark, P. J.
Gradl, W.
Playfer, S.
Watson, J. E.
Andreotti, M.
Bettoni, D.
Bozzi, C.
Calabrese, R.
Cecchi, A.
Cibinetto, G.
Franchini, P.
Luppi, E.
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.
Buzzo, A.
Contri, R.
Lo Vetere, M.
Macri, M. M.
Monge, M. R.
Passaggio, S.
Patrignani, C.
Robutti, E.
Santroni, A.
Tosi, S.
Chaisanguanthum, K. S.
Morii, M.
Marks, J.
Schenk, S.
Uwer, U.
Klose, V.
Lacker, H. M.
Bard, D. J.
Dauncey, P. D.
Nash, J. A.
Vazquez, W. Panduro
Tibbetts, M.
Behera, P. K.
Chai, X.
Charles, M. J.
Mallik, U.
Cochran, J.
Crawley, H. B.
Dong, L.
Meyer, W. T.
Prell, S.
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Grosdidier, G.
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Morandin, M.
Posocco, M.
Rotondo, M.
Simonetto, F.
Stroili, R.
Voci, C.
del Amo Sanchez, P.
Ben-Haim, E.
Briand, H.
Calderini, G.
Chauveau, J.
David, P.
Del Buono, L.
Hamon, O.
Leruste, Ph.
Ocariz, J.
Perez, A.
Prendki, J.
Sitt, S.
Gladney, L.
Biasini, M.
Covarelli, R.
Manoni, E.
Angelini, C.
Batignani, G.
Bettarini, S.
Carpinelli, M.
Cervelli, A.
Forti, F.
Giorgi, M. A.
Lusiani, A.
Marchiori, G.
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.
del Re, D.
Di Marco, E.
Faccini, R.
Ferrarotto, F.
Ferroni, F.
Gaspero, M.
Jackson, P. D.
Gioi, L. Li
Mazzoni, M. A.
Morganti, S.
Piredda, G.
Polci, F.
Renga, F.
Voena, C.
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Schroeder, H.
Waldi, R.
Adye, T.
Franek, B.
Olaiya, E. O.
Wilson, F. F.
Emery, S.
Escalier, M.
Esteve, L.
Ganzhur, S. F.
de Monchenault, G. Hamel
Kozanecki, W.
Vasseur, G.
Yeche, Ch.
Zito, M.
Chen, X. R.
Liu, H.
Park, W.
Purohit, M. V.
White, R. M.
Wilson, J. R.
Allen, M. T.
Aston, D.
Bartoldus, R.
Bechtle, P.
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.
Gabareen, A. M.
Gowdy, S. J.
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.
Perazzo, A.
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.
Yi, K.
Young, C. C.
Ziegler, V.
Burchat, P. R.
Edwards, A. J.
Majewski, S. A.
Miyashita, T. S.
Petersen, B. A.
Wilden, L.
Ahmed, S.
Alam, M. S.
Ernst, J. A.
Pan, B.
Saeed, M. A.
Zain, S. B.
Spanier, S. M.
Wogsland, B. J.
Eckmann, R.
Ritchie, J. L.
Ruland, A. M.
Schilling, C. J.
Schwitters, R. F.
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.
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.
Band, H. R.
Chen, X.
Dasu, S.
Flood, K. T.
Pan, Y.
Pierini, M.
Prepost, R.
Vuosalo, C. O.
Wu, S. L.
CA BABAR Collaboration
TI Measurements of branching fractions for B+ -> rho(+)gamma, B-0 ->
rho(0)gamma, and B-0 -> omega gamma
SO PHYSICAL REVIEW D
LA English
DT Article
ID TO-LEADING ORDER; RADIATIVE DECAYS; RATIOS
AB We present branching fraction measurements for the radiative decays B+-> rho(+)gamma, B-0 -> rho(0)gamma, and B-0 -> omega gamma. The analysis is based on a data sample of 465 X 10(6) B (B) over bar events collected with the BABAR detector at the PEP-II asymmetric-energy B Factory located at the Stanford Linear Accelerator Center. We find B(B+ -> rho(+)gamma) = (1.20(-0.37)(+0.42) +/- 0.20) X 10(-6), B(B-0 -> rho(0)gamma) = (0.97(-0.22)(+0.24) +/- 0.06) X 10(-6), and a 90% C.L. upper limit B(B-0 -> omega gamma) < 0.9 X 10(-6), where the first error is statistical and the second is systematic. We also measure the isospin-violating quantity Gamma(B+ -> rho(+)gamma)/2 Gamma(B-0 -> rho(0)gamma) - 1 = -0.43 (+0.25)(-0.22) +/- 0.10.
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[Tico, J. Garra; Grauges, E.] Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain.
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[Lopez, L.; Palano, A.; Pappagallo, M.] Univ Bari, Dipartmento Fis, I-70126 Bari, Italy.
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[Koch, H.; Schroeder, T.] Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany.
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[Barrett, M.; Khan, A.] Brunel Univ, Uxbridge UB8 3PH, Middx, England.
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[Kobel, M. J.; Mader, W. F.; Nogowski, R.; Schubert, K. R.; Schwierz, R.; Sundermann, J. E.; Volk, A.] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
[Bernard, D.; Bonneaud, G. R.; Latour, E.; Thiebaux, Ch.; Verderi, M.] Ecole Polytech, CNRS IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
[Clark, P. J.; Gradl, W.; Playfer, S.; Watson, J. E.] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
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[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, Lab Nazl Frascati, I-00044 Frascati, Italy.
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[Chaisanguanthum, K. S.; Morii, M.] Harvard Univ, Cambridge, MA 02138 USA.
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[Cochran, J.; Crawley, H. B.; Dong, L.; 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.; Lae, C. K.] Johns Hopkins Univ, Baltimore, MD 21218 USA.
[Denig, A. G.; Fritsch, M.; Schott, G.] Univ Karlsruhe, Inst Expt Kernphys, D-76021 Karlsruhe, Germany.
[Arnaud, N.; Bequilleux, J.; D'Orazio, A.; Davier, M.; da Costa, J. Firmino; Grosdidier, G.; Hoecker, A.; Lepeltier, V.; Le Diberder, F.; Lutz, A. M.; Pruvot, S.; Roudeau, P.; Schune, M. H.; Serrano, J.; Sordini, V.; Stocchi, A.; Wormser, G.] IN2P3 CNRS, 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.
[Cowan, G.; Flaecher, H. U.; Hopkins, D. A.; Paramesvaran, S.; Salvatore, F.; 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.
[Anderson, J.; Chen, C.; Jawahery, A.; Roberts, D. A.; Simi, G.; Tuggle, J. M.] Univ Maryland, College Pk, MD 20742 USA.
[Dallapiccola, C.; Li, X.; Salvati, E.; Saremi, S.] Univ Massachusetts, Amherst, MA 01003 USA.
[Cowan, R.; Dujmic, D.; Fisher, P. H.; Koeneke, K.; Sciolla, G.; Spitznagel, M.; Taylor, F.; Yamamoto, R. K.; Zhao, M.] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
[Patel, P. M.; Robertson, S. H.] McGill Univ, Montreal, PQ H3A 2T8, Canada.
[Lazzaro, A.; Lombardo, V.; Palombo, F.] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy.
[Lazzaro, A.; Palombo, F.] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
[Bauer, J. M.; Cremaldi, L.; Eschenburg, V.; Godang, R.; Kroeger, R.; Sanders, D. A.; Summers, D. J.; Zhao, H. W.] Univ Mississippi, University, MS 38677 USA.
[Simard, M.; Taras, P.; Viaud, F. B.] 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 Fisiche, 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.
[Benelli, G.; Corwin, L. A.; Honscheid, K.; Kagan, H.; Kass, R.; Morris, J. P.; Rahimi, A. M.; Regensburger, J. J.; Sekula, S. J.; Wong, Q. K.] 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.
[del Amo Sanchez, P.; Ben-Haim, E.; Briand, H.; Calderini, G.; Chauveau, J.; David, P.; Del Buono, L.; Hamon, O.; Leruste, Ph.; Ocariz, J.; Perez, A.; Prendki, J.; Sitt, S.] Univ Paris 07, Univ Paris 06, CNRS IN2P3, Lab Phys Nucl Hautes Energies, F-75252 Paris, France.
[Gladney, L.] Univ Penn, Philadelphia, PA 19104 USA.
[Biasini, M.; Covarelli, R.; Manoni, E.] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy.
[Sordini, V.; Biasini, M.; Covarelli, R.; Manoni, E.] Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
[Angelini, C.; Lusiani, A.; Marchiori, G.; 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.; Carpinelli, M.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Marchiori, G.; 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.; del Re, D.; Di Marco, E.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Jackson, P. D.; Gioi, L. Li; Mazzoni, M. A.; Morganti, S.; Piredda, G.; Polci, F.; Renga, F.; Voena, C.] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy.
[Baracchini, E.; del Re, D.; Di Marco, E.; Faccini, R.; Ferroni, F.; Gaspero, M.; Polci, F.; 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.
[Emery, S.; Escalier, M.; Esteve, L.; Ganzhur, S. F.; de Monchenault, G. Hamel; Kozanecki, W.; Vasseur, G.; Yeche, Ch.; Zito, M.] CEA Saclay, DSM Irfu, F-91191 Gif Sur Yvette, France.
[Chen, X. R.; Liu, H.; Park, W.; Purohit, M. V.; White, R. M.; Wilson, J. R.] Univ S Carolina, Columbia, SC 29208 USA.
[Allen, M. T.; Aston, D.; Bartoldus, R.; Bechtle, P.; 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.; Gabareen, A. M.; Gowdy, S. J.; 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.; Perazzo, A.; 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.; Yi, K.; Young, C. C.; Ziegler, V.] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
[Burchat, P. R.; Edwards, A. J.; Majewski, S. A.; Miyashita, T. S.; Petersen, B. A.; Wilden, L.] 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.
[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.] Univ Texas Austin, Austin, TX 78712 USA.
[Drummond, B. W.; Izen, J. M.; Lou, X. C.] Univ Texas Dallas, Dallas, 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 Torino, 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, Dipartimento Fis, I-34127 Trieste, Italy.
[Azzolini, V.; Lopez-March, N.; Martinez-Vidal, F.; Milanes, D. A.; Oyanguren, A.] Univ Valencia, IFIC, CSIC, E-46071 Valencia, Spain.
[Albert, J.; Banerjee, Sw.; Bhuyan, B.; Choi, H. H. F.; Hamano, K.; 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.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
[Band, H. R.; Chen, X.; Dasu, S.; Flood, K. T.; Pan, Y.; Pierini, M.; Prepost, R.; Vuosalo, C. O.; Wu, S. L.] Univ Wisconsin, Madison, WI 53706 USA.
[Carpinelli, M.] Univ Sassari, I-07100 Sassari, Italy.
[Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.] Univ Savoie, F-74941 Annecy Le Vieux, France.
[Abrams, G. S.; Battaglia, M.; Brown, D. N.; Cahn, R. N.; Jacobsen, R. G.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G.; Osipenkov, I. L.; Ronan, M. T.; Tackmann, K.; Tanabe, T.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Hawkes, C. M.; Soni, N.; Watson, A. T.] Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
[Walker, D.] Univ Bristol, Bristol BS8 3TL, Avon, England.
[Bard, D. J.; Dauncey, P. D.; Nash, J. A.; Vazquez, W. Panduro; Tibbetts, M.] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
[Bevan, A. J.; Clarke, C. K.; George, K. A.; Di Lodovico, F.; Sacco, R.; Sigamani, M.] Univ London, London E1 4NS, England.
[Alwyn, K. E.; Bailey, D.; Barlow, R. J.; Chia, Y. M.; Edgar, C. L.; Jackson, G.; Lafferty, G. D.; West, T. J.; Yi, J. I.] Univ Manchester, Manchester M13 9PL, Lancs, England.
[Adye, T.; Franek, B.; Olaiya, E. O.; Wilson, F. F.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Arnaud, N.; Bequilleux, J.; D'Orazio, A.; Davier, M.; da Costa, J. Firmino; Grosdidier, G.; Hoecker, A.; Lepeltier, V.; Le Diberder, F.; Lutz, A. M.; Pruvot, S.; Roudeau, P.; Schune, M. H.; Serrano, J.; Sordini, V.; Stocchi, A.; Wormser, G.] Univ Paris 11, Ctr Sci Orsay, F-91898 Orsay, France.
RP Aubert, B (reprint author), CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
RI Calabrese, Roberto/G-4405-2015; 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; Di Lodovico, Francesca/L-9109-2016; Pappagallo,
Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey,
Raymond/E-2830-2016; Negrini, Matteo/C-8906-2014; Monge, Maria
Roberta/G-9127-2012; Oyanguren, Arantza/K-6454-2014; Luppi,
Eleonora/A-4902-2015; White, Ryan/E-2979-2015; Patrignani,
Claudia/C-5223-2009; 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; Della Ricca,
Giuseppe/B-6826-2013
OI Raven, Gerhard/0000-0002-2897-5323; Calabrese,
Roberto/0000-0002-1354-5400; 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; 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;
Negrini, Matteo/0000-0003-0101-6963; Monge, Maria
Roberta/0000-0003-1633-3195; Oyanguren, Arantza/0000-0002-8240-7300;
Luppi, Eleonora/0000-0002-1072-5633; White, Ryan/0000-0003-3589-5900;
Patrignani, Claudia/0000-0002-5882-1747; 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;
Della Ricca, Giuseppe/0000-0003-2831-6982
NR 23
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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 DEC
PY 2008
VL 78
IS 11
AR 112001
DI 10.1103/PhysRevD.78.112001
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200007
ER
PT J
AU Avakian, H
Efremov, AV
Schweitzer, P
Yuan, F
AF Avakian, H.
Efremov, A. V.
Schweitzer, P.
Yuan, F.
TI Transverse momentum dependent distribution function h(1T)(perpendicular
to) and the single spin asymmetry A(UT)(sin(3 phi-3S))
SO PHYSICAL REVIEW D
LA English
DT Review
ID DEEP-INELASTIC SCATTERING; FINAL-STATE INTERACTIONS; DRELL-YAN
PROCESSES; PARTON DISTRIBUTION-FUNCTIONS; POLARIZED DEUTERIUM TARGET;
AZIMUTHAL ASYMMETRIES; SEMIINCLUSIVE DIS; BAG MODEL; FRAGMENTATION
FUNCTIONS; PION ELECTROPRODUCTION
AB The leading twist transverse momentum dependent parton distribution function h(1T)(perpendicular to) is studied. We review the theoretical properties of this function, and compute it in the bag model. We find in the bag model an interesting relation, and observe it to hold also in other relativistic models: The difference between helicity and transversity distributions, often said to be a 'measure of relativistic effects' in the nucleon, is related to h(1T)(perpendicular to). This function is chirally odd and can be accessed in combination with the Collins effect in semi-inclusive deep-inelastic scattering, where it gives rise to an azimuthal single spin asymmetry proportional to sin(3 phi - phi(S)). We discuss preliminary COMPASS data on that observable and make predictions for future experiments on various targets at JLab, COMPASS, and HERMES.
C1 [Avakian, H.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
[Efremov, A. V.] Joint Inst Nucl Res, Dubna 141980, Russia.
[Schweitzer, P.] Ruhr Univ Bochum, Inst Theoret Phys 2, D-44780 Bochum, Germany.
[Schweitzer, P.] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA.
[Yuan, F.] Brookhaven Natl Lab, Res Ctr, RIKEN, Upton, NY 11973 USA.
[Yuan, F.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
RP Avakian, H (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
RI Yuan, Feng/N-4175-2013
FU BMBF (Verbundforschung); German-Russian collaboration (DFG-RFFI) [436
RUS 113/881/0]; European Integrated Infrastructure Initiative Hadron
Physics project [RII3-CT-2004-506078]; RFBR [06-02-16215, 07-02-91557];
DOE [DE-AC05-06OR23177]; Jefferson Science Associates; LLC; RIKEN;
Brookhaven National Laboratory; U.S. Department of Energy
[DE-AC02-98CH10886]
FX We thank S. Meissner for discussions. The work is partially supported by
BMBF (Verbundforschung), German-Russian collaboration (DFG-RFFI) under
Contract No. 436 RUS 113/881/0 and is part of the European Integrated
Infrastructure Initiative Hadron Physics project under Contract No.
RII3-CT-2004-506078. A. E. is also supported by RFBR Grant Nos.
06-02-16215 and 07-02-91557, RF MSE RNP.2.2.2.2.6546 (MIREA), and by the
Heisenberg-Landau Program of JINR. The work was supported in part by DOE
Contract No. DE-AC05-06OR23177, under which Jefferson Science
Associates, LLC, operates the Jefferson Lab. F. Y. is grateful to RIKEN,
Brookhaven National Laboratory and the U.S. Department of Energy
(Contract No. DE-AC02-98CH10886) for providing the facilities essential
for the completion of this work.
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SN 1550-7998
EI 1550-2368
J9 PHYS REV D
JI Phys. Rev. D
PD DEC
PY 2008
VL 78
IS 11
AR 114024
DI 10.1103/PhysRevD.78.114024
PG 12
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200042
ER
PT J
AU Bazavov, A
Petreczky, P
Velytsky, A
AF Bazavov, Alexei
Petreczky, Peter
Velytsky, Alexander
TI Static quark-antiquark pair in SU(2) gauge theory
SO PHYSICAL REVIEW D
LA English
DT Article
ID QCD PHASE-TRANSITION; HADRONIC SPECTRAL FUNCTIONS; GLUON PLASMA;
PERTURBATION-THEORY; HIGH-TEMPERATURE; POLYAKOV LOOP; FREE-ENERGY;
POTENTIALS; MASS
AB We study singlet and triplet correlation functions of a static quark-antiquark pair defined through gauge invariant timelike Wilson loops and Polyakov loop correlators in finite temperature SU(2) gauge theory. We use the Luscher-Weisz multilevel algorithm, which allows us to calculate these correlators at very low temperatures. We observe that the naive separation of singlet and triplet states, in general, does not hold nonperturbatively; however, it is recovered in the limit of small separation, and the temperature dependence of the corresponding correlators is indeed very different.
C1 [Bazavov, Alexei] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA.
[Petreczky, Peter] Brookhaven Natl Lab, Res Ctr, RIKEN, Upton, NY 11973 USA.
[Petreczky, Peter] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[Velytsky, Alexander] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
[Velytsky, Alexander] Argonne Natl Lab, HEP Div, Argonne, IL 60439 USA.
[Velytsky, Alexander] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Bazavov, A (reprint author), Univ Arizona, Dept Phys, Tucson, AZ 85721 USA.
EM bazavov@physics.arizona.edu; petreczk@bnl.gov; vel@uchicago.edu
FU U. S. Department of Energy [DE-AC02-98CH10886, DE-AC02-06CH11357]; DOE
[DE-FC02-06ER-41439]; NSF [0555397]; Argonne National Laboratory;
University of Chicago
FX This work was supported by the U. S. Department of Energy under Contract
No. DE-AC02-98CH10886. The work of A. B. was supported by DOE Grant No.
DE-FC02-06ER-41439 and NSF Grant No. 0555397. A. V.'s work was supported
by the Joint Theory Institute funded together by Argonne National
Laboratory and the University of Chicago, and in part by the U. S.
Department of Energy, Division of High Energy Physics and Office of
Nuclear Physics, under Contract No. DE-AC02-06CH11357. We thank N.
Brambilla, F. Karsch D. Teaney, and A. Vairo for useful discussions.
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SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD DEC
PY 2008
VL 78
IS 11
AR 114026
DI 10.1103/PhysRevD.78.114026
PG 12
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200044
ER
PT J
AU Berger, EL
Nadolsky, PM
AF Berger, Edmond L.
Nadolsky, Pavel M.
TI Longitudinal parity-violating asymmetry in hadronic decays of weak
bosons in polarized proton collisions
SO PHYSICAL REVIEW D
LA English
DT Article
ID PARTON DISTRIBUTIONS; SPIN ASYMMETRIES; W+/; COLLIDERS; PHYSICS; ORDER;
QCD
AB We investigate the possible measurement of parity-violating spin asymmetries in jet pair production in proton-proton collisions at the Brookhaven Relativistic Heavy Ion Collider (RHIC), with the goal to constrain longitudinally polarized quark and antiquark distribution functions. A measurable asymmetry could be observed in the vicinity of the massive weak W boson resonance, where the parity-violating signal appears above the parity-conserving background and is enhanced by interference of the strong and electroweak production amplitudes. We discuss the potential for such measurements, perhaps the first opportunity to measure a parity-violating asymmetry in proton-proton collisions at RHIC. Sensitivity of this measurement to the polarization of down-type antiquarks is demonstrated.
C1 [Berger, Edmond L.] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA.
[Nadolsky, Pavel M.] So Methodist Univ, Dept Phys, Dallas, TX 75275 USA.
RP Berger, EL (reprint author), Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA.
FU U. S. Department of Energy [DE-AC02-06CH11357, DE- FG02-04ER41299];
Lightner-Sams Foundation; National Science Foundation [PHY05-51164]
FX The motivation for this work and preliminary estimates were discussed by
P. M. N. at RHIC Spin Workshops at Brookhaven National Laboratory in
October, 2005 and April, 2007. We are grateful to the organizers of
these workshops for the stimulating environment. P. M. N. is
particularly grateful to S. Arnold, A. Metz, and W. Vogelsang for
enlightening discussions of the presented topics. E. L. B. is supported
by the U. S. Department of Energy under Contract No. DE-AC02-06CH11357.
P. M. N. is partly supported by the U. S. Department of Energy under
Grant No. DE- FG02-04ER41299, and by Lightner-Sams Foundation. The
authors thank the Kavli Institute for Theoretical Physics (KITP), Santa
Barbara, for hospitality during the course of some of this work. The
KITP is supported by the National Science Foundation under Grant No. NSF
PHY05-51164.
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SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD DEC
PY 2008
VL 78
IS 11
AR 114010
DI 10.1103/PhysRevD.78.114010
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200028
ER
PT J
AU Blennow, M
Mirizzi, A
Serpico, PD
AF Blennow, Mattias
Mirizzi, Alessandro
Serpico, Pasquale D.
TI Nonstandard neutrino-neutrino refractive effects in dense neutrino gases
SO PHYSICAL REVIEW D
LA English
DT Article
ID MASSLESS NEUTRINOS; OSCILLATIONS; SUPERNOVA
AB We investigate the effects of nonstandard four-fermion neutrino-neutrino interactions on the flavor evolution of dense neutrino gases. We find that in the regions where the neutrino-neutrino refractive index leads to collective flavor oscillations, the presence of new neutrino interactions can produce flavor equilibration in both normal and inverted neutrino mass hierarchy. In realistic supernova environments, these effects are significant if the nonstandard neutrino-neutrino interaction strength is comparable to the one expected in the standard case, dominating the ordinary matter potential. However, very small nonstandard neutrino-neutrino couplings are enough to trigger the usual collective neutrino flavor transformations in the inverted neutrino mass hierarchy, even if the mixing angle vanishes exactly.
C1 [Blennow, Mattias; Mirizzi, Alessandro] Werner Heisenberg Inst Phys, Max Planck Inst Phys, D-80805 Munich, Germany.
[Serpico, Pasquale D.] CERN, Div Theory, Dept Phys, CH-1211 Geneva 23, Switzerland.
[Serpico, Pasquale D.] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
RP Blennow, M (reprint author), Werner Heisenberg Inst Phys, Max Planck Inst Phys, Fohringer Ring 6, D-80805 Munich, Germany.
EM blennow@mppmu.mpg.de; amirizzi@mppmu.mpg.de; serpico@cern.ch
FU Swedish Research Council [6232007-8066]; Istituto Nazionale di Fisica
Nucleare
FX We would like to thank Georg Raffelt for reading the manuscript and
giving useful suggestions and Walter Winter for comments. A. M. also
wishes to thank Basudeb Dasgupta for interesting discussions on this
topic. This work was supported in part by the Swedish Research Council
(Vetenskapsra det) through Contract No. 6232007-8066 [M. B.] and
Istituto Nazionale di Fisica Nucleare (INFN, Italy) [A. M.].
NR 65
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PI COLLEGE PK
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SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD DEC
PY 2008
VL 78
IS 11
AR 113004
DI 10.1103/PhysRevD.78.113004
PG 7
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200014
ER
PT J
AU Caceres, G
Hooper, D
AF Caceres, Gabriel
Hooper, Dan
TI Neutralino dark matter as the source of the WMAP haze
SO PHYSICAL REVIEW D
LA English
DT Article
ID EMISSION; HALOS
AB Previously, it has been argued that the anomalous emission from the region around the Galactic Center observed by WMAP, known as the "WMAP Haze," may be the synchrotron emission from relativistic electrons and positrons produced in dark matter annihilations. In particular, the angular distribution, spectrum, and intensity of the observed emission are consistent with the signal expected to result from a weakly interactive massive particle with an electroweak-scale mass and an annihilation cross section near the value predicted for a thermal relic. In this article, we revisit this signal within the context of supersymmetry and evaluate the parameter space of the constrained minimal supersymmetric standard model. We find that, over much of the supersymmetric parameter space, the lightest neutralino is predicted to possess the properties required to generate the WMAP Haze. In particular, the focus point, A-funnel, and bulk regions (in which the neutralino annihilation cross section is of the order of 3x10(-26) cm(3)/s) typically predict a neutralino with a mass, annihilation cross section, and dominant annihilation modes which are within the range required to produce the observed features of the WMAP Haze. The stau-coannihilation region (in which the annihilation is suppressed), in contrast, is disfavored as an explanation for the origin of this signal.
C1 [Caceres, Gabriel; Hooper, Dan] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Caceres, Gabriel] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Hooper, Dan] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
RP Caceres, G (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA.
FU U. S. Department of Energy; NASA [NAG5-10842]; Fermilab Summer
Internships in Science and Technology Program
FX We would like to thank Greg Dobler and Doug Finkbeiner for very helpful
discussions. This work has been supported by the U. S. Department of
Energy and by NASA Grant No. NAG5-10842. G. C. has been supported by the
Fermilab Summer Internships in Science and Technology Program.
NR 40
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U1 0
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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 DEC
PY 2008
VL 78
IS 12
AR 123512
DI 10.1103/PhysRevD.78.123512
PG 12
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391RT
UT WOS:000262251100026
ER
PT J
AU Chen, H
Yuan, W
Chang, L
Liu, YX
Klahn, T
Roberts, CD
AF Chen, Huan
Yuan, Wei
Chang, Lei
Liu, Yu-Xin
Klahn, Thomas
Roberts, Craig D.
TI Chemical potential and the gap equation
SO PHYSICAL REVIEW D
LA English
DT Article
ID DYSON-SCHWINGER-EQUATIONS; CHIRAL-SYMMETRY BREAKING; EUCLIDEAN GREENS
FUNCTIONS; DENSITY-DEPENDENCE; CONFINING MODEL; QUANTUM CHROMODYNAMICS;
QUARK PROPAGATOR; GLUON PROPAGATOR; DECAY CONSTANT; NUCLEON RADIUS
AB In general, the kernel of QCD's gap equation possesses a domain of analyticity upon which the equation's solution at nonzero chemical potential is simply obtained from the in-vacuum result through analytic continuation. On this domain the single-quark number- and scalar-density distribution functions are mu independent. This is illustrated via two models for the gap equation's kernel. The models are alike in concentrating support in the infrared. They differ in the form of the vertex, but qualitatively the results are largely insensitive to the Ansatz. In vacuum both models realize chiral symmetry in the Nambu-Goldstone mode, and in the chiral limit, with increasing chemical potential, they exhibit a first-order chiral symmetry restoring transition at mu approximate to M(0), where M(p(2)) is the dressed-quark mass function.
C1 [Chen, Huan; Yuan, Wei; Chang, Lei; Liu, Yu-Xin] Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
[Chen, Huan; Yuan, Wei; Chang, Lei; Liu, Yu-Xin] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China.
[Liu, Yu-Xin] Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China.
[Klahn, Thomas; Roberts, Craig D.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Liu, YX (reprint author), Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
EM liuyx@phy.pku.edu.cn; cdroberts@anl.gov
OI Roberts, Craig/0000-0002-2937-1361
FU Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357];
National Natural Science Foundation of China [10425521, 10575005,
10675007, 10705002]; Major State Basic Research Development Program
[G2007CB815000]; Key Grant Project of the Chinese Ministry of Education
[305001]; Research Fund for the Doctoral Program of Higher Education of
China [20040001010]
FX We are grateful for thoughtful comments from I. C. Cloet, G. Eichmann,
B. El-Bennich, P. Jaikumar, A. Krassnigg, and R. D. Young. This work was
supported by the Department of Energy, Office of Nuclear Physics,
Contract No. DE-AC02-06CH11357; the National Natural Science Foundation
of China under Contract No. 10425521, No. 10575005, No. 10675007, and
No. 10705002; the Major State Basic Research Development Program under
Contract No. G2007CB815000; the Key Grant Project of the Chinese
Ministry of Education under Contact No. 305001; and the Research Fund
for the Doctoral Program of Higher Education of China under Grant No.
20040001010.
NR 73
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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 DEC
PY 2008
VL 78
IS 11
AR 116015
DI 10.1103/PhysRevD.78.116015
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200093
ER
PT J
AU Cooper, F
Dawson, JF
Mihaila, B
AF Cooper, Fred
Dawson, John F.
Mihaila, Bogdan
TI Casimir dependence of transverse distribution of pairs produced from a
strong constant chromoelectric background field
SO PHYSICAL REVIEW D
LA English
DT Article
ID QUARK-GLUON PLASMA; STRONG ELECTRIC-FIELD; HEAVY-ION COLLISIONS;
FLUX-TUBE MODEL; PREEQUILIBRIUM EVOLUTION; QUANTUM CHROMODYNAMICS;
VACUUM BEHAVIOR; NUCLEUS
AB The transverse distribution of gluon and quark-antiquark pairs produced from a strong constant chromoelectric field depends on two gauge invariant quantities, C-1=(EEa)-E-a and C-2=[d(abc)E(a)E(b)E(c)](2), as shown earlier in [G. C. Nayak and P. van Nieuwenhuizen, Phys. Rev. D 71, 125001 (2005)] for gluons and in [G. C. Nayak, Phys. Rev. D 72, 125010 (2005)] for quarks. Here, we discuss the explicit dependence of the distribution on the second Casimir invariant C-2 and show the dependence is at most a 15% effect.
C1 [Cooper, Fred] Natl Sci Fdn, Arlington, VA 22230 USA.
[Cooper, Fred] Santa Fe Inst, Santa Fe, NM 87501 USA.
[Cooper, Fred] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
[Dawson, John F.] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA.
[Mihaila, Bogdan] Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA.
RP Cooper, F (reprint author), Natl Sci Fdn, 4201 Wilson Blvd, Arlington, VA 22230 USA.
EM cooper@santafe.edu; john.dawson@unh.edu; bmihaila@lanl.gov
RI Mihaila, Bogdan/D-8795-2013
OI Mihaila, Bogdan/0000-0002-1489-8814
NR 31
TC 10
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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 DEC
PY 2008
VL 78
IS 11
AR 117901
DI 10.1103/PhysRevD.78.117901
PG 4
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200104
ER
PT J
AU Dimopoulos, S
Graham, PW
Hogan, JM
Kasevich, MA
Rajendran, S
AF Dimopoulos, Savas
Graham, Peter W.
Hogan, Jason M.
Kasevich, Mark A.
Rajendran, Surjeet
TI Atomic gravitational wave interferometric sensor
SO PHYSICAL REVIEW D
LA English
DT Article
ID INTERPLANETARY MAGNETIC FIELD; PHASE-TRANSITIONS; MATTER-WAVE;
RADIATION; NOISE; COMPACT; MOTION; STATE
AB We propose two distinct atom interferometer gravitational wave detectors, one terrestrial and another satellite based, utilizing the core technology of the Stanford 10 m atom interferometer presently under construction. Each configuration compares two widely separated atom interferometers run using common lasers. The signal scales with the distance between the interferometers, which can be large since only the light travels over this distance, not the atoms. The terrestrial experiment with two similar to 10 m atom similar to 10(-19)/root Hz in the 1 Hz-10 Hz band, inaccessible to LIGO, and can detect gravitational waves from solar mass binaries out to megaparsec distances. The satellite experiment with two atom interferometers separated by a similar to 1000 km baseline can probe the same frequency spectrum as LISA with comparable strain sensitivity similar to 10(-20)/root Hz . The use of ballistic atoms (instead of mirrors) as inertial test masses improves systematics coming from vibrations and acceleration noise, and significantly reduces spacecraft control requirements. We analyze the backgrounds in this configuration and discuss methods for controlling them to the required levels.
C1 [Dimopoulos, Savas; Hogan, Jason M.; Rajendran, Surjeet] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
[Graham, Peter W.; Rajendran, Surjeet] Stanford Univ, SLAC, Menlo Pk, CA 94025 USA.
RP Dimopoulos, S (reprint author), Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
EM savas@stanford.edu; pwgraham@stanford.edu; hogan@stanford.edu;
kasevich@stanford.edu; surjeet@stanford.edu
OI Hogan, Jason/0000-0003-1218-2692; Graham, Peter/0000-0002-1600-1601
NR 81
TC 111
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U2 19
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 DEC
PY 2008
VL 78
IS 12
AR 122002
DI 10.1103/PhysRevD.78.122002
PG 35
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391RT
UT WOS:000262251100003
ER
PT J
AU Grigoryan, HR
Radyushkin, AV
AF Grigoryan, H. R.
Radyushkin, A. V.
TI Pion in the holographic model with 5D Yang-Mills fields
SO PHYSICAL REVIEW D
LA English
DT Article
ID CHIRAL-SYMMETRY BREAKING; TRANSITION FORM-FACTOR; ENERGY HADRON PHYSICS;
VECTOR-MESONS; PI-0; QCD
AB We study the pion in the holographic model of Hirn and Sanz which contains two Yang-Mills fields defined in the background of the sliced AdS space. The infrared boundary conditions imposed on these fields generate the spontaneous breaking of the chiral symmetry down to its vector subgroup. Within the framework of this model, we get an analytic expression for the pion form factor and a compact result for its radius. We also extend the holographic model to include the Chern-Simons term which is required to reproduce the appropriate axial anomaly of QCD. As a result, we calculate the anomalous form factor of the pion and predict its Q(2) slope for the kinematics when one of the photons is almost on shell. We also observe that the anomalous form factor with one real and one virtual photon is given by the same analytic expression as the electromagnetic form factor of a charged pion. One of the advantages of the present model is that it does not require an infrared boundary counterterm to correctly reproduce the anomaly of QCD.
C1 [Grigoryan, H. R.; Radyushkin, A. V.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
[Radyushkin, A. V.] Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
[Radyushkin, A. V.] Joint Inst Nucl Res Dubna, Theoret Phys Lab, Dubna, Russia.
RP Grigoryan, HR (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
FU Jefferson Laboratory; Jefferson Science Associates, LLC under U. S. DOE
[DE-AC05-06OR23177]
FX H. R. G. would like to thank J. Erlich, C. Carone, T. S. Lee and C. D.
Roberts for valuable comments, and A. W. Thomas for support at Jefferson
Laboratory. We thank the organizers of the program "From Strings to
Things: String Theory Methods in QCD and Hadron Physics'' at the
Institute for Nuclear Theory at the University of Washington for support
during this program, the participation in which stimulated the
completion of this work. This paper is authored by Jefferson Science
Associates, LLC under U. S. DOE Contract No. DE-AC05-06OR23177.
NR 52
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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 DEC
PY 2008
VL 78
IS 11
AR 115008
DI 10.1103/PhysRevD.78.115008
PG 10
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200068
ER
PT J
AU Hiraide, K
Alcaraz-Aunion, JL
Brice, SJ
Bugel, L
Catala-Perez, J
Cheng, G
Conrad, JM
Djurcic, Z
Dore, U
Finley, DA
Franke, AJ
Giganti, C
Gomez-Cadenas, JJ
Guzowski, P
Hanson, A
Hayato, Y
Jover-Manas, G
Karagiorgi, G
Katori, T
Kobayashi, YK
Kobilarcik, T
Kubo, H
Kurimoto, Y
Louis, WC
Loverre, PF
Ludovici, L
Mahn, KBM
Mariani, C
Masuike, S
Matsuoka, K
Metcalf, W
Mills, G
Mitsuka, G
Miyachi, Y
Mizugashira, S
Moore, CD
Nakajima, Y
Nakaya, T
Napora, R
Nienaber, P
Nguyen, V
Orme, D
Otani, M
Russell, AD
Sanchez, F
Shaevitz, MH
Shibata, TA
Sorel, M
Stefanski, RJ
Takei, H
Tanaka, HK
Tanaka, M
Tayloe, R
Taylor, IJ
Tesarek, RJ
Uchida, Y
Van de Water, R
Walding, JJ
Wascko, MO
White, H
Wilking, MJ
Yokoyama, M
Zeller, GP
Zimmerman, ED
AF Hiraide, K.
Alcaraz-Aunion, J. L.
Brice, S. J.
Bugel, L.
Catala-Perez, J.
Cheng, G.
Conrad, J. M.
Djurcic, Z.
Dore, U.
Finley, D. A.
Franke, A. J.
Giganti, C.
Gomez-Cadenas, J. J.
Guzowski, P.
Hanson, A.
Hayato, Y.
Jover-Manas, G.
Karagiorgi, G.
Katori, T.
Kobayashi, Y. K.
Kobilarcik, T.
Kubo, H.
Kurimoto, Y.
Louis, W. C.
Loverre, P. F.
Ludovici, L.
Mahn, K. B. M.
Mariani, C.
Masuike, S.
Matsuoka, K.
Metcalf, W.
Mills, G.
Mitsuka, G.
Miyachi, Y.
Mizugashira, S.
Moore, C. D.
Nakajima, Y.
Nakaya, T.
Napora, R.
Nienaber, P.
Nguyen, V.
Orme, D.
Otani, M.
Russell, A. D.
Sanchez, F.
Shaevitz, M. H.
Shibata, T. -A.
Sorel, M.
Stefanski, R. J.
Takei, H.
Tanaka, H. -K.
Tanaka, M.
Tayloe, R.
Taylor, I. J.
Tesarek, R. J.
Uchida, Y.
Van de Water, R.
Walding, J. J.
Wascko, M. O.
White, H.
Wilking, M. J.
Yokoyama, M.
Zeller, G. P.
Zimmerman, E. D.
CA SciBooNE-Collaboration
TI Search for charged current coherent pion production on carbon in a
few-GeV neutrino beam
SO PHYSICAL REVIEW D
LA English
DT Article
ID K2K SCIBAR DETECTOR; NUCLEON INTERACTIONS; LEPTON POLARIZATION;
SCATTERING; SIMULATION; PCAC
AB The SciBooNE Collaboration has performed a search for charged current coherent pion production from muon neutrinos scattering on carbon, nu C-12(mu) -> mu C-12 pi+(,) with two distinct data samples. No evidence for coherent pion production is observed. We set 90% confidence level upper limits on the cross section ratio of charged current coherent pion production to the total charged current cross section at 0.67 X 10(-2) at mean neutrino energy 1.1 GeV and 1.36 X 10(-2) at mean neutrino energy 2.2 GeV.
C1 [Hiraide, K.; Kubo, H.; Kurimoto, Y.; Matsuoka, K.; Nakajima, Y.; Orme, D.; Otani, M.; Yokoyama, M.] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan.
[Wilking, M. J.; Zimmerman, E. D.] Univ Colorado, Dept Phys, Boulder, CO 80309 USA.
[Cheng, G.; Djurcic, Z.; Franke, A. J.; Mahn, K. B. M.; Shaevitz, M. H.; Tanaka, H. -K.] Columbia Univ, Dept Phys, New York, NY 10027 USA.
[Tanaka, M.] High Energy Accelerator Res Organizat KEK, Tsukuba, Ibaraki 3050801, Japan.
[Hanson, A.; Katori, T.; Tayloe, R.] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA.
[Mitsuka, G.] Univ Tokyo, Inst Cosm Ray Res, Res Ctr Cosm Neutrinos, Kashiwa, Chiba 2778582, Japan.
[Metcalf, W.] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
[Bugel, L.; Conrad, J. M.; Karagiorgi, G.; Nguyen, V.] MIT, Dept Phys, Cambridge, MA 02139 USA.
[Napora, R.] Purdue Univ Calumet, Dept Chem & Phys, Hammond, IN 46323 USA.
[Dore, U.; Giganti, C.; Loverre, P. F.; Ludovici, L.; Mariani, C.] Univ Roma La Sapienza, Dipartmento Fis, I-1000185 Rome, Italy.
[Nienaber, P.] St Marys Univ Minnesota, Dept Phys, Winona, MN 55987 USA.
[Kobayashi, Y. K.; Masuike, S.; Miyachi, Y.; Mizugashira, S.; Shibata, T. -A.; Takei, H.] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan.
[Catala-Perez, J.; Gomez-Cadenas, J. J.; Sorel, M.] Univ Valencia, Inst Fis Corpuscular, E-46071 Valencia, Spain.
[Catala-Perez, J.; Gomez-Cadenas, J. J.; Sorel, M.] CSIC, E-46071 Valencia, Spain.
[Dore, U.; Giganti, C.; Loverre, P. F.; Mariani, C.] Ist Nazl Fis Nucl, I-1000185 Rome, Italy.
[Louis, W. C.; Mills, G.; Van de Water, R.; Zeller, G. P.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Hayato, Y.] Univ Tokyo, Inst Cosm Ray Res, Kamioka Observ, Gifu 5061205, Japan.
[Brice, S. J.; Finley, D. A.; Kobilarcik, T.; Moore, C. D.; Russell, A. D.; Tesarek, R. J.; White, H.] Fermilab Natl Accelerator Lab, Batavia, IL 60150 USA.
[Guzowski, P.; Taylor, I. J.; Uchida, Y.; Walding, J. J.; Wascko, M. O.] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England.
[Alcaraz-Aunion, J. L.; Jover-Manas, G.; Sanchez, F.] Univ Autonoma Barcelona, Inst Fis dAltes Energies, E-08193 Barcelona, Spain.
RP Hiraide, K (reprint author), Kyoto Univ, Dept Phys, Kyoto 6068502, Japan.
RI Yokoyama, Masashi/A-4458-2011; Ludovici, Lucio/F-5917-2011; Sanchez,
Federico/F-5809-2012; Gomez Cadenas, Juan Jose/L-2003-2014; Mariani,
Camillo/J-6070-2015; Hiraide, Katsuki/A-4479-2011;
OI Yokoyama, Masashi/0000-0003-2742-0251; Ludovici,
Lucio/0000-0003-1970-9960; Sanchez, Federico/0000-0003-0320-3623; Gomez
Cadenas, Juan Jose/0000-0002-8224-7714; Mariani,
Camillo/0000-0003-3284-4681; Wascko, Morgan/0000-0002-8348-4447; Louis,
William/0000-0002-7579-3709; Sorel, Michel/0000-0003-2141-9508; Van de
Water, Richard/0000-0002-1573-327X; Katori, Teppei/0000-0002-9429-9482
NR 59
TC 82
Z9 82
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 DEC
PY 2008
VL 78
IS 11
AR 112004
DI 10.1103/PhysRevD.78.112004
PG 19
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200010
ER
PT J
AU Jackson, MG
AF Jackson, Mark G.
TI Spin-statistics violations in superstring theory
SO PHYSICAL REVIEW D
LA English
DT Article
ID ANTISYMMETRIC TENSOR FIELD; EXPERIMENTAL LIMIT; STRINGS;
COMPACTIFICATIONS; PRINCIPLE; BRANE; SPACE
AB I describe how superstring theory may violate spin statistics in an experimentally observable manner. Reviewing the basics of superstring interactions and how to utilize these to produce a statistical phase, I then apply these ideas to two specific examples. The first is the case of heterotic world sheet linkings, whereby one small closed string momentarily enlarges sufficiently to pass over another, producing such a statistical phase. The second is the braneworld model with noncommutative geometry, whereby matter composed of open strings may couple to a background in which spacetime coordinates do not commute, modifying the field (anti)commutator algebra. I conclude with ways to sharpen and experimentally test these exciting avenues to possibly verify superstring theory.
C1 Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
[Jackson, Mark G.] Fermilab Natl Accelerator Lab, Theory Grp, Batavia, IL 60510 USA.
RP Jackson, MG (reprint author), Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, POB 500, Batavia, IL 60510 USA.
EM markj@fnal.gov
FU DOE
FX I would like to thank J. Gomis, S. Hartnoll, J. Harvey, S. Hellerman, C.
Hogan, A. Kostelecky, J. Lykken, C. Petrascu, and D. Tong for useful
discussions and collaborations. This work was supported by the DOE at
Fermilab.
NR 48
TC 3
Z9 3
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 DEC
PY 2008
VL 78
IS 12
AR 126009
DI 10.1103/PhysRevD.78.126009
PG 7
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391RT
UT WOS:000262251100113
ER
PT J
AU Jaikumar, P
Rupak, G
Steiner, AW
AF Jaikumar, Prashanth
Rupak, Gautam
Steiner, Andrew W.
TI Viscous damping of r-mode oscillations in compact stars with quark
matter
SO PHYSICAL REVIEW D
LA English
DT Article
ID ROTATING RELATIVISTIC STARS; ISOLATED RADIO PULSARS; YOUNG
NEUTRON-STARS; GRAVITATIONAL-RADIATION; BULK VISCOSITY; HYBRID STARS;
INSTABILITY; TRANSPORT; EMISSION; BREAKING
AB We determine characteristic time scales for the viscous damping of r-mode oscillations in rapidly rotating compact stars that contain quark matter. We present results for the color-flavor-locked (CFL) phase of dense quark matter, in which the up, down, and strange quarks are gapped, as well as the normal (ungapped) quark phase. While the ungapped quark phase supports a temperature window 10(8) K <= T <= 5x10(9) K where the r mode is damped even for rapid rotation, the r mode in a rapidly rotating pure CFL star is not damped in the temperature range 10(10) K <= T <= 10(11) K. Rotating hybrid stars with quark matter cores display an instability window whose width is determined by the amount of quark matter present, and they can have large spin frequencies outside this window. Except at high temperatures T >= 10(10) K, the presence of a quark phase allows for larger critical frequencies and smaller spin periods compared to rotating neutron stars. If low-mass x-ray binaries contain a large amount of ungapped or CFL quark matter, then our estimates of the r-mode instability suggest that there should be a population of rapidly rotating binaries at nu greater than or similar to 1000 Hz which have not yet been observed.
C1 [Jaikumar, Prashanth] Inst Math Sci, Madras 600113, Tamil Nadu, India.
[Jaikumar, Prashanth] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
[Rupak, Gautam] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA.
[Rupak, Gautam] Mississippi State Univ, Dept Phys & Astron, Mississippi State, MS 39762 USA.
[Steiner, Andrew W.] Michigan State Univ, Natl Superconducting Cyclotron Lab, Joint Inst Nucl Astrophys, E Lansing, MI 48824 USA.
[Steiner, Andrew W.] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA.
RP Jaikumar, P (reprint author), Inst Math Sci, CIT Campus, Madras 600113, Tamil Nadu, India.
EM jaikumar@imsc.res.in; grupak@u.washington.edu; steinera@pa.msu.edu
OI Steiner, Andrew/0000-0003-2478-4017
FU U. S. Department of Energy; Office of Nuclear Physics
[DE-AC02-06CH11357]; Ohio University Office of Research; U. S.
Department of Energy [DE-FG02-03ER41260]; NSF-PFC [PHY 02-16783]; NASA
[NNX08AG76G]
FX The authors thank Mark Alford, Edward Brown, Cristina Manuel, Thomas
Schafer, and Andreas Schmitt for useful discussions related to this
work. P. J. acknowledges support from the Department of Atomic Energy of
the Government of India, the Argonne National Laboratory as a visiting
scientist under U. S. Department of Energy, Office of Nuclear Physics,
Contract No. DE-AC02-06CH11357, and the Ohio University Office of
Research. G. R. is supported in part by the U. S. Department of Energy
Grant No. DE-FG02-03ER41260. A. W. S. is supported by the Joint
Institute for Nuclear Astrophysics at MSU under NSF-PFC Grant No. PHY
02-16783 and by NASA under Grant No. NNX08AG76G.
NR 83
TC 29
Z9 29
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 DEC
PY 2008
VL 78
IS 12
AR 123007
DI 10.1103/PhysRevD.78.123007
PG 14
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391RT
UT WOS:000262251100011
ER
PT J
AU Kahn, Y
Schmitt, M
Tait, TMP
AF Kahn, Yonatan
Schmitt, Michael
Tait, Tim M. P.
TI Enhanced rare pion decays from a model of MeV dark matter
SO PHYSICAL REVIEW D
LA English
DT Article
ID ANNIHILATION LINE EMISSION; GALACTIC-CENTER; BRANCHING RATIO; RADIATION
AB A model has been proposed in which neutral scalar particles chi, of mass 1-10 MeV, annihilate through the exchange of a light vector boson U, of mass 10-100 MeV, to produce the 511 keV line observed emanating from the center of the Galaxy. The chi interacts weakly with normal matter and is a viable dark matter candidate. If the U boson couples to quarks as well as to electrons, it could enhance the branching ratio for the rare decay pi(0) -> e(+)e(-). A recent measurement by the KTeV Collaboration lies 3 standard deviations above a prediction by Dorokhov and Ivanov, and we relate this excess to the couplings of the U boson. The values are consistent with other constraints and considerations. We make some comments on possible improvements in the data.
C1 [Kahn, Yonatan; Schmitt, Michael; Tait, Tim M. P.] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
[Tait, Tim M. P.] Argonne Natl Lab, HEP Div, Argonne, IL 60439 USA.
RP Kahn, Y (reprint author), Northwestern Univ, Dept Phys & Astron, 2145 Sheridan Rd, Evanston, IL 60208 USA.
FU Department of Energy [DE-AC02-06CH11357, DE-FG02-91ER40684]
FX We thank C. Boehm for stimulating discussions and M. Velasco for
interesting discussions of measurements of light meson decays. Research
at Argonne National Laboratory is supported in part by the Department of
Energy under Contract No. DE-AC02-06CH11357, and the work by Y. K. and
M. S. is supported by Contract No. DE-FG02-91ER40684.
NR 25
TC 33
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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 DEC
PY 2008
VL 78
IS 11
AR 115002
DI 10.1103/PhysRevD.78.115002
PG 4
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200062
ER
PT J
AU Kang, ZB
Qiu, JW
Vogelsang, W
Yuan, F
AF Kang, Zhong-Bo
Qiu, Jian-Wei
Vogelsang, Werner
Yuan, Feng
TI Accessing trigluon correlations in the nucleon via the single spin
asymmetry in open charm production
SO PHYSICAL REVIEW D
LA English
DT Article
ID DEEP-INELASTIC SCATTERING; POLARIZED PROTON-BEAM; TRANSVERSE-MOMENTUM;
HARD-SCATTERING; ANALYZING POWER; CROSS-SECTIONS; DRELL-YAN; QCD;
LEPTOPRODUCTION; FACTORIZATION
AB We calculate the single transverse-spin asymmetry for open charm production in pp collisions within the QCD collinear factorization approach. We include contributions from both twist-three quark-gluon and trigluon correlation functions. We find that the quark-gluon correlation functions alone generate only a very small asymmetry for open charm production in the kinematic region of current interest at RHIC, so that the observation of any significant single-spin asymmetry would be a clear indication of the presence of trigluon correlations inside a polarized proton. We furthermore demonstrate that the trigluon contribution could be very different for the production of D and (D) over bar mesons. These features make the single-spin asymmetry in open charm production in polarized pp collisions at RHIC an excellent probe of trigluon correlation functions.
C1 [Kang, Zhong-Bo; Qiu, Jian-Wei] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Vogelsang, Werner] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[Yuan, Feng] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
[Yuan, Feng] Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA.
RP Kang, ZB (reprint author), Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
EM kangzb@iastate.edu; jwq@iastate.edu; vogelsan@quark.phy.bnl.gov;
fyuan@lbl.gov
RI Yuan, Feng/N-4175-2013; Kang, Zhongbo/P-3645-2014
FU U. S. Department of Energy [DE-FG02-87ER40371, DE-AC02-98CH10886,
DE-AC02-05CH11231]; Institute of High Energy Physics; Chinese Academy of
Science
FX We thank G. Kramer for providing us with their Fortran code for the D
meson fragmentation functions. Z. K. and J. Q. are supported in part by
the U. S. Department of Energy under Grant No. DE-FG02-87ER40371. J. Q.
thanks the Institute of High Energy Physics, Chinese Academy of Science
for its hospitality during the completion of this work. W. V. and F. Y.
are grateful to the U. S. Department of Energy (Contract No.
DE-AC02-98CH10886) for providing the facilities essential for the
completion of this work. F. Y. is also supported in part by the U. S.
Department of Energy under Contract No. DE-AC02-05CH11231.
NR 73
TC 44
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U1 0
U2 1
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 DEC
PY 2008
VL 78
IS 11
AR 114013
DI 10.1103/PhysRevD.78.114013
PG 9
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200031
ER
PT J
AU Ligeti, Z
Stewart, IW
Tackmann, FJ
AF Ligeti, Zoltan
Stewart, Iain W.
Tackmann, Frank J.
TI Treating the b quark distribution function with reliable uncertainties
SO PHYSICAL REVIEW D
LA English
DT Article
ID EFFECTIVE-FIELD-THEORIES; UB-VERTICAL-BAR; PHOTON ENERGY; SUM-RULES;
INVISIBLE RENORMALON; LEADING LOGARITHMS; NNLO CALCULATION; 2-LOOP
RESULT; MESON DECAYS; RENORMALIZATION
AB The parton distribution function for a b quark in the B meson (called the shape function) plays an important role in the analysis of the B -> X-s gamma and B -> X(u)l(v) over bar data, and gives one of the dominant uncertainties in the determination of vertical bar V-ub vertical bar. We introduce a new framework to treat the shape function, which consistently incorporates its renormalization group evolution and all constraints on its shape and moments in any short distance mass scheme. At the same time it allows a reliable treatment of the uncertainties. We develop an expansion in a suitable complete set of orthonormal basis functions, which provides a procedure for systematically controlling the uncertainties due to the unknown functional form of the shape function. This is a significant improvement over fits to model functions. Given any model for the shape function, our construction gives an orthonormal basis in which the model occurs as the first term, and corrections to it can be studied. We introduce a new short distance scheme, the "invisible scheme,'' for the kinetic energy matrix element lambda(1). We obtain closed form results for the differential rates that incorporate perturbative corrections and a summation of logarithms at any order in perturbation theory, and present results using known next-to-next-to-leading order expressions. The experimental implementation of our framework is straightforward.
C1 [Ligeti, Zoltan; Tackmann, Frank J.] Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Stewart, Iain W.] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA.
RP Ligeti, Z (reprint author), Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
FU Office of Science, Offices of High Energy and Nuclear Physics of the
U.S. Department of Energy [DE-AC02-05CH11231, DE-FG02-94ER40818]; Sloan
Foundation
FX We thank Kerstin Tackmann for discussions and comments on the
manuscript. Z. L. and I. S. thank the CERN Theory Group and the Aspen
Center for Physics for hospitality while parts of this work were
completed. F. T. thanks the particle physics group at Humboldt
University Berlin for its hospitality during the final stages of this
work. This work was supported in part by the Director, Office of
Science, Offices of High Energy and Nuclear Physics of the U.S.
Department of Energy under the Contract Nos. DE-AC02-05CH11231 and
DE-FG02-94ER40818. I.S. was also supported in part by the DOE OJI
program and by the Sloan Foundation.
NR 78
TC 86
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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 DEC
PY 2008
VL 78
IS 11
AR 114014
DI 10.1103/PhysRevD.78.114014
PG 27
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200032
ER
PT J
AU Lin, HW
Cohen, SD
Edwards, RG
Richards, DG
AF Lin, Huey-Wen
Cohen, Saul D.
Edwards, Robert G.
Richards, David G.
TI Lattice study of the N-P-11 transition form factors
SO PHYSICAL REVIEW D
LA English
DT Article
ID NUCLEON RESONANCE REGION; MESON PRODUCTION; ROPER RESONANCE; QCD;
ELECTROPRODUCTION; PHYSICS
AB Experiments at Jefferson Laboratory, MIT-Bates, LEGS, Mainz, Bonn, GRAAL, and Spring-8 offer new opportunities to understand in detail how nucleon resonance (N*) properties emerge from the nonperturbative aspects of QCD. Preliminary data from CLAS Collaboration, which cover a large range of photon virtuality Q(2), show interesting behavior with respect to Q(2) dependence: in the region Q(2) <= 1: 5 GeV2, both the transverse amplitude A(1/2)(Q(2)) and the longitudinal amplitude S-1/2(Q(2)) decrease rapidly. In this work, we attempt to use first-principles lattice QCD (for the first time) to provide a model-independent study of the transition form factor between the nucleon and its first radially excited state.
C1 [Lin, Huey-Wen; Cohen, Saul D.; Edwards, Robert G.; Richards, David G.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
RP Lin, HW (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
EM hwlin@jlab.org
OI Cohen, Saul/0000-0001-6804-3320
FU DOE [DE-AC05-06OR23177]; Jefferson Science Associates, LLC, operates
Jefferson Lab
FX This work was done using the CHROMA software suite [31] on clusters at
Jefferson Laboratory using time awarded under the SciDAC Initiative.
This work was supported by DOE Contract No. DE-AC05-06OR23177, under
which Jefferson Science Associates, LLC, operates Jefferson Lab.
NR 31
TC 29
Z9 29
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 DEC
PY 2008
VL 78
IS 11
AR 114508
DI 10.1103/PhysRevD.78.114508
PG 5
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200059
ER
PT J
AU Mihaila, B
Dawson, JF
Cooper, F
AF Mihaila, Bogdan
Dawson, John F.
Cooper, Fred
TI Fermion pair production in QED and the backreaction problem in
(1+1)-dimensional boost-invariant coordinates revisited
SO PHYSICAL REVIEW D
LA English
DT Article
ID CENTRAL RAPIDITY REGION; PARTICLE-PRODUCTION; MODEL
AB We study two different initial conditions for fermions for the problem of pair production of fermions coupled to a classical electromagnetic field with backreaction in (1 + 1)-dimensional boost-invariant coordinates. Both of these conditions are consistent with fermions initially in a vacuum state. We present results for the proper-time evolution of the electric field E, the current J, the matter energy density epsilon, and the pressure p as a function of the proper time for these two cases. We also determine the interpolating number density as a function of the proper time. We find that when we use a "first-order adiabatic'' vacuum initial condition or a "free-field'' initial condition for the fermion field, we obtain essentially similar behavior for physically measurable quantities. The second method is computationally simpler, it is twice as fast and involves half the storage required by the first method.
C1 [Mihaila, Bogdan] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
[Dawson, John F.] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA.
[Cooper, Fred] Natl Sci Fdn, Arlington, VA 22230 USA.
[Cooper, Fred] Santa Fe Inst, Santa Fe, NM 87501 USA.
[Cooper, Fred] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Mihaila, B (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
EM bmihaila@lanl.gov; john.dawson@unh.edu; cooper@santafe.edu
RI Mihaila, Bogdan/D-8795-2013
OI Mihaila, Bogdan/0000-0002-1489-8814
NR 17
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 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD DEC
PY 2008
VL 78
IS 11
AR 116017
DI 10.1103/PhysRevD.78.116017
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200095
ER
PT J
AU Ramalho, G
Pena, MT
Gross, F
AF Ramalho, G.
Pena, M. T.
Gross, Franz
TI D-state effects in the electromagnetic N Delta transition
SO PHYSICAL REVIEW D
LA English
DT Review
ID RELATIVISTIC RESONANCE MODEL; 3-BODY BOUND-STATE; FORM-FACTORS;
DELTA(1232) RESONANCE; GAMMA-ASTERISK; QUARK-MODEL; BAG MODEL;
PION-PHOTOPRODUCTION; BARYON RESONANCES; MESON PRODUCTION
AB We consider here a manifestly covariant quark model of the nucleon and the Delta, where one quark is off shell, and the other two quarks form an on-shell diquark pair. Using this model, we have shown previously that the nucleon form factors and the dominant form factor for the gamma N -> Delta transition (the magnetic dipole (M1) form factor) can be well described by nucleon and Delta wave functions with S-state components only. In this paper, we show that nonvanishing results for the small electric (E2) and Coulomb (C2) quadrupole form factors can be obtained if D-state components are added to the Delta valence quark wave function. We present a covariant definition of these components and compute their contributions to the form factors. We find that these components cannot, by themselves, describe the data. Explicit pion cloud contributions must also be added, and these contributions dominate both the E2 and the C2 form factors. By parametrizing the pion cloud contribution for the transition electric and Coulomb form factors in terms of the neutron electric form factor, we estimate that the contributions of the Delta D-state coupled to quark core spin of 3/2 is of the order of 1%, and the contributions of the Delta D-state coupled to quark core spin 1/2 is of the order of 4%.
C1 [Ramalho, G.; Gross, Franz] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
[Ramalho, G.; Pena, M. T.] Ctr Fis Teor Particulas, P-1049001 Lisbon, Portugal.
[Pena, M. T.] Univ Tecn Lisboa, Dept Phys, Inst Super Tecn, P-1049001 Lisbon, Portugal.
[Gross, Franz] Coll William & Mary, Williamsburg, VA 23185 USA.
RP Ramalho, G (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
RI Pena, Teresa/M-4683-2013;
OI Pena, Teresa/0000-0002-3529-2408; Ramalho, Gilberto/0000-0002-9930-659X
FU Jefferson Science Associates [DE-AC05-06OR23177]; Portuguese Fundacao
para a Ciencia e Tecnologia (FCT) [SFRH/BPD/26886/2006]
FX This work was partially support by Jefferson Science Associates, LLC
under U. S. DOE Contract No. DE-AC05-06OR23177. G. R. was supported by
the Portuguese Fundacao para a Ciencia e Tecnologia (FCT) under Grant
No. SFRH/BPD/26886/2006.
NR 126
TC 46
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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 DEC
PY 2008
VL 78
IS 11
AR 114017
DI 10.1103/PhysRevD.78.114017
PG 26
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200035
ER
PT J
AU Zhou, J
Yuan, F
Liang, ZT
AF Zhou, Jian
Yuan, Feng
Liang, Zuo-Tang
TI Hyperon polarization in unpolarized scattering processes
SO PHYSICAL REVIEW D
LA English
DT Article
ID DEEP-INELASTIC SCATTERING; TRANSVERSE-SPIN ASYMMETRIES; FINAL-STATE
INTERACTIONS; DRELL-YAN PROCESSES; SINGLE-SPIN; QUANTUM CHROMODYNAMICS;
PARTON DISTRIBUTIONS; INCLUSIVE PRODUCTION; HADRONIC SCATTERING; POWER
CORRECTIONS
AB Transverse polarization in the hyperon (Lambda) production in the unpolarized deep inelastic scattering and pp collisions is studied in the twist-three approach, considering the contribution from the quark-gluon-antiquark correlation distribution in nucleon. We further compare our results for deep inelastic scattering to a transverse momentum dependent factorization approach, and find consistency between the two approaches in the intermediate transverse momentum region. We also find that in pp collisions, there are only derivative terms contributions, and the nonderivative terms vanish.
C1 [Zhou, Jian; Yuan, Feng] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
[Zhou, Jian; Liang, Zuo-Tang] Shandong Univ, Sch Phys, Jinan 250100, Shandong, Peoples R China.
[Yuan, Feng] Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA.
RP Zhou, J (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM jzhou@lbl.gov; fyuan@lbl.gov; liang@sdu.edu.cn
RI Yuan, Feng/N-4175-2013
FU U. S. Department of Energy [DE-AC02-05CH11231, DE-AC0298CH10886];
National Natural Science Foundation of China [10525523]
FX This work was supported in part by the U. S. Department of Energy under
Contract No. DE-AC02-05CH11231 and the National Natural Science
Foundation of China under Approval No. 10525523. We are grateful to
RIKEN, Brookhaven National Laboratory, and the U. S. Department of
Energy ( Contract No. DE-AC0298CH10886) for providing the facilities
essential for the completion of this work. J. Z. is partially supported
by China Scholarship Council.
NR 46
TC 21
Z9 21
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 DEC
PY 2008
VL 78
IS 11
AR 114008
DI 10.1103/PhysRevD.78.114008
PG 6
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 391SD
UT WOS:000262252200026
ER
PT J
AU Antal, T
Krapivsky, PL
Rakos, A
AF Antal, T.
Krapivsky, P. L.
Rakos, A.
TI Logarithmic current fluctuations in nonequilibrium quantum spin chains
SO PHYSICAL REVIEW E
LA English
DT Article
DE current fluctuations; spin systems
ID SIMPLE EXCLUSION PROCESS; CORRELATION AMPLITUDE; RANDOM MATRICES; ENERGY
CURRENT; RELAXATION; MODEL; TRANSPORT
AB We study zero-temperature quantum spin chains, which are characterized by a nonvanishing current. For the XX model starting from the initial state parallel to center dot up arrow up arrow up arrow down arrow down arrow down arrow center dot > we derive an exact expression for the variance of the total spin current. We show that asymptotically the variance exhibits an anomalously slow logarithmic growth; we also extract the subleading constant term. We then argue that the logarithmic growth remains valid for the XXZ model in the critical region.
C1 [Antal, T.] Harvard Univ, Program Evolutionary Dynam, Cambridge, MA 02138 USA.
[Krapivsky, P. L.] Boston Univ, Dept Phys, Boston, MA 02215 USA.
[Krapivsky, P. L.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Krapivsky, P. L.] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
[Rakos, A.] Hungarian Acad Sci, Res Grp Condensed Matter Phys, H-1111 Budapest, Hungary.
RP Antal, T (reprint author), Harvard Univ, Program Evolutionary Dynam, Cambridge, MA 02138 USA.
RI Antal, Tibor/A-4512-2008; Rakos, Attila/B-6480-2008; Krapivsky,
Pavel/A-4612-2014
FU NIGMS NIH HHS [R01GM078986]
NR 45
TC 22
Z9 22
U1 0
U2 3
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
EI 1550-2376
J9 PHYS REV E
JI Phys. Rev. E
PD DEC
PY 2008
VL 78
IS 6
AR 061115
DI 10.1103/PhysRevE.78.061115
PN 1
PG 8
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 391NP
UT WOS:000262240300027
PM 19256810
ER
PT J
AU Carmi, S
Krapivsky, PL
ben-Avraham, D
AF Carmi, Shai
Krapivsky, P. L.
ben-Avraham, Daniel
TI Partition of networks into basins of attraction
SO PHYSICAL REVIEW E
LA English
DT Article
ID COMPLEX NETWORKS; COMMUNITY STRUCTURE; INTERNET
AB We study partition of networks into basins of attraction based on a steepest ascent search for the node of highest degree. Each node is associated with, or "attracted" to its neighbor of maximal degree, as long as the degree is increasing. A node that has no neighbors of higher degree is a peak, attracting all the nodes in its basin. Maximally random scale-free networks exhibit different behavior based on their degree distribution exponent gamma: For small gamma (broad distribution) networks are dominated by a giant basin, whereas for large gamma (narrow distribution) there are numerous basins, with peaks attracting mainly their nearest neighbors. We derive expressions for the first two moments of the number of basins. We also obtain the complete distribution of basin sizes for a class of hierarchical deterministic scale-free networks that resemble random nets. Finally, we generalize the problem to regular networks and lattices where all degrees are equal, and thus the attractiveness of a node must be determined by an assigned weight, rather than the degree. We derive the complete distribution of basins of attraction resulting from randomly assigned weights in one-dimensional chains.
C1 [Carmi, Shai] Boston Univ, Ctr Polymer Studies, Boston, MA 02215 USA.
[Carmi, Shai] Bar Ilan Univ, Minerva Ctr, IL-52900 Ramat Gan, Israel.
[Carmi, Shai] Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel.
[Krapivsky, P. L.] Boston Univ, Dept Phys, Boston, MA 02215 USA.
[Krapivsky, P. L.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Krapivsky, P. L.] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
[ben-Avraham, Daniel] Clarkson Univ, Dept Phys, Potsdam, NY 13699 USA.
RP Carmi, S (reprint author), Boston Univ, Ctr Polymer Studies, Boston, MA 02215 USA.
RI Carmi, Shai/F-4817-2010; Krapivsky, Pavel/A-4612-2014
OI Carmi, Shai/0000-0002-0188-2610;
NR 54
TC 7
Z9 8
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0045
EI 2470-0053
J9 PHYS REV E
JI Phys. Rev. E
PD DEC
PY 2008
VL 78
IS 6
AR 066111
DI 10.1103/PhysRevE.78.066111
PN 2
PG 11
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 391NS
UT WOS:000262240600019
PM 19256909
ER
PT J
AU Dai, B
Leal, LG
Redondo, A
AF Dai, Bing
Leal, L. Gary
Redondo, Antonio
TI Disjoining pressure for nonuniform thin films
SO PHYSICAL REVIEW E
LA English
DT Article
ID 2-DIMENSIONAL LINEAR FLOW; EQUAL-SIZED DROPS; LIQUID-FILMS; FREE ENERGY;
EQUILIBRIUM-CONFIGURATIONS; SOLID-SURFACES; FORCES; COALESCENCE;
INTERFACE; FLUID
AB The effect of the attractive forces originating from van der Waals interactions on the dynamics of thin films (<= similar to 100 nm) is often approximated in fluid dynamics as the disjoining pressure between two unbounded parallel interfaces. However, it is known that this concept of the disjoining pressure, as a force per unit area between parallel interfaces, cannot generally be extended to films of nonuniform thickness. In this paper, we derive a formula for the disjoining pressure for a film of nonuniform thickness by minimizing the total Helmholtz free energy for a thin film residing on a solid substrate. Comparing to the augmented Young-Laplace equation, the disjoining pressure for a thin film of small slope on a flat substrate is shown to take the form Pi=-A(123)(4-3h(x)(2)+3hh(xx))/24 pi h(3), where A(123) is the Hamaker constant for phases 1 and 3 interacting through phase 2; h, h(x), and h(xx) are the local film thickness, slope and second order derivative, respectively. For the limiting case of parallel interfaces (e.g., h(x) = h(xx) equivalent to 0), the disjoining pressure reduces to Pi=-A(123)/6 pi h(3) in agreement with the classical Lifshitz expression for the van der Waals force. The derivation can be readily extended to more general nonuniform films by constructing tangential planes at both interfaces of the films. Because of steric effects that prevent molecules from overlapping each other, the molecular size cannot be neglected when applying the mesoscopic concept of the disjoining pressure to films of thickness comparable to molecular scales.
C1 [Dai, Bing; Leal, L. Gary] Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA.
[Redondo, Antonio] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Dai, B (reprint author), MEMC Elect Mat Inc, 501 Pearl Dr, St Peters, MO 63376 USA.
NR 34
TC 19
Z9 19
U1 1
U2 17
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 DEC
PY 2008
VL 78
IS 6
AR 061602
DI 10.1103/PhysRevE.78.061602
PG 9
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 391NP
UT WOS:000262240300065
ER
PT J
AU Law, KJH
Kevrekidis, PG
Koukouloyannis, V
Kourakis, I
Frantzeskakis, DJ
Bishop, AR
AF Law, K. J. H.
Kevrekidis, P. G.
Koukouloyannis, V.
Kourakis, I.
Frantzeskakis, D. J.
Bishop, A. R.
TI Discrete solitons and vortices in hexagonal and honeycomb lattices:
Existence, stability, and dynamics
SO PHYSICAL REVIEW E
LA English
DT Article
ID 2-DIMENSIONAL PHOTONIC LATTICES; WAVE-GUIDE ARRAYS; NONLINEAR
SCHRODINGER-EQUATION; SPATIAL OPTICAL SOLITONS; BREATHERS; MODES;
DIPOLE; STATES; MATTER
AB We consider a prototypical dynamical lattice model, namely, the discrete nonlinear Schrodinger equation on nonsquare lattice geometries. We present a systematic classification of the solutions that arise in principal six-lattice-site and three-lattice-site contours in the form of both discrete multipole solitons and discrete vortices. Additionally to identifying the possible states, we analytically track their linear stability both qualitatively and quantitatively. We find that among the six-site configurations, the "hexapole" of alternating phases (0-pi), as well as the vortex of topological charge S=2 have intervals of stability; among three-site states, only the vortex of topological charge S=1 may be stable in the case of focusing nonlinearity. These conclusions are confirmed both for hexagonal and for honeycomb lattices by means of detailed numerical bifurcation analysis of the stationary states from the anticontinuum limit, and by direct simulations to monitor the dynamical instabilities, when the latter arise. The dynamics reveal a wealth of nonlinear behavior resulting not only in single-site solitary wave forms, but also in robust multisite breathing structures.
C1 [Law, K. J. H.; Kevrekidis, P. G.] Univ Massachusetts, Dept Math & Stat, Amherst, MA 01003 USA.
[Koukouloyannis, V.] Aristotle Univ Thessaloniki, Sch Phys, Thessaloniki 54124, Greece.
[Koukouloyannis, V.] Technol Educ Inst Serres, Dept Civil Engn, Serres 64124, Greece.
[Kourakis, I.] Queens Univ Belfast, Ctr Plasma Phys, Belfast BT7 1NN, Antrim, North Ireland.
[Frantzeskakis, D. J.] Univ Athens, Dept Phys, Athens 15784, Greece.
[Bishop, A. R.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Bishop, A. R.] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Law, KJH (reprint author), Univ Massachusetts, Dept Math & Stat, Amherst, MA 01003 USA.
RI Law, Kody/A-6375-2010; Kourakis, Ioannis/B-7885-2010;
OI Kourakis, Ioannis/0000-0002-4027-0166; Law, Kody/0000-0003-3133-2537
FU NSF [DMS-0505663, DMS-0806762]; Alexander von Humboldt Foundation; U.K.
Engineering and Physical Sciences Research (EPSRC)
FX P. G. K. gratefully acknowledges support from NSF Grants No. DMS-0505663
and No. DMS-0806762 and NSF CAREER, as well as from the Alexander von
Humboldt Foundation. The work of I.K. was supported by the U.K.
Engineering and Physical Sciences Research (EPSRC) via a Science and
Innovation grant.
NR 54
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 2470-0045
EI 2470-0053
J9 PHYS REV E
JI Phys. Rev. E
PD DEC
PY 2008
VL 78
IS 6
AR 066610
DI 10.1103/PhysRevE.78.066610
PN 2
PG 12
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 391NS
UT WOS:000262240600081
PM 19256971
ER
PT J
AU Swift, DC
Kraus, RG
Loomis, EN
Hicks, DG
McNaney, JM
Johnson, RP
AF Swift, Damian C.
Kraus, Richard G.
Loomis, Eric N.
Hicks, Damien G.
McNaney, James M.
Johnson, Randall P.
TI Shock formation and the ideal shape of ramp compression waves
SO PHYSICAL REVIEW E
LA English
DT Article
ID ALUMINUM
AB We derive expressions for shock formation based on the local curvature of the flow characteristics during dynamic compression. Given a specific ramp adiabat, calculated for instance from the equation of state for a substance, the ideal nonlinear shape for an applied ramp loading history can be determined. We discuss the region affected by lateral release, which can be presented in compact form for the ideal loading history. Example calculations are given for representative metals and plastic ablators. Continuum dynamics (hydrocode) simulations were in good agreement with the algebraic forms. Example applications are presented for several classes of laser-loading experiment, identifying conditions where shocks are desired but not formed, and where long-duration ramps are desired.
C1 [Swift, Damian C.; McNaney, James M.] Lawrence Livermore Natl Lab, Condensed Matter & Mat Div, Livermore, CA 94551 USA.
[Kraus, Richard G.] Univ Cambridge, Cavendish Lab, Dept Phys, Cambridge CB3 0HE, England.
[Loomis, Eric N.; Johnson, Randall P.] Los Alamos Natl Lab, Grp P 24, Los Alamos, NM 87545 USA.
[Hicks, Damien G.] Lawrence Livermore Natl Lab, Div 5, Livermore, CA 94551 USA.
RP Swift, DC (reprint author), Lawrence Livermore Natl Lab, Condensed Matter & Mat Div, 7000 E Ave, Livermore, CA 94551 USA.
EM dswift@llnl.gov
RI McNaney, James/F-5258-2013; Hicks, Damien/B-5042-2015
OI Hicks, Damien/0000-0001-8322-9983
FU Laboratory-Directed Research and Development [06-SI-004, 08-ER-038]; U.
S. Department of Energy [DE-AC52-07NA27344]
FX This work was performed in support of Laboratory-Directed Research and
Development Projects No. 06-SI-004 and No. 08-ER-038, under the auspices
of the U. S. Department of Energy under Contract No. DE-AC52-07NA27344.
NR 30
TC 15
Z9 16
U1 2
U2 16
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 DEC
PY 2008
VL 78
IS 6
AR 066115
DI 10.1103/PhysRevE.78.066115
PG 9
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 391NS
UT WOS:000262240600023
PM 19256913
ER
PT J
AU Zastrau, U
Fortmann, C
Faustlin, RR
Cao, LF
Doppner, T
Dusterer, S
Glenzer, SH
Gregori, G
Laarmann, T
Lee, HJ
Przystawik, A
Radcliffe, P
Reinholz, H
Ropke, G
Thiele, R
Tiggesbaumker, J
Truong, NX
Toleikis, S
Uschmann, I
Wierling, A
Tschentscher, T
Forster, E
Redmer, R
AF Zastrau, U.
Fortmann, C.
Faeustlin, R. R.
Cao, L. F.
Doeppner, T.
Duesterer, S.
Glenzer, S. H.
Gregori, G.
Laarmann, T.
Lee, H. J.
Przystawik, A.
Radcliffe, P.
Reinholz, H.
Roepke, G.
Thiele, R.
Tiggesbaeumker, J.
Truong, N. X.
Toleikis, S.
Uschmann, I.
Wierling, A.
Tschentscher, T.
Foerster, E.
Redmer, R.
TI Bremsstrahlung and line spectroscopy of warm dense aluminum plasma
heated by xuv free-electron-laser radiation
SO PHYSICAL REVIEW E
LA English
DT Article
ID NATIONAL IGNITION FACILITY; X-RAY; ABSORPTION; HYDROGEN; PULSES;
INTERFEROMETRY; WAVELENGTHS; ULTRAVIOLET; IONIZATION; SPECTRA
AB We report the creation of solid-density aluminum plasma using free-electron laser (FEL) radiation at 13.5 nm wavelength. Ultrashort pulses were focused on a bulk Al target, yielding an intensity of 2 x 10(14) W/cm(2). The radiation emitted from the plasma was measured using an xuv spectrometer. Bremsstrahlung and line intensity ratios yield consistent electron temperatures of about 38 eV, supported by radiation hydrodynamics simulations. This shows that xuv FELs heat up plasmas volumetrically and homogeneously at warm-dense-matter conditions, which are accurately characterized by xuv spectroscopy.
C1 [Zastrau, U.; Cao, L. F.; Uschmann, I.; Foerster, E.] Univ Jena, Inst Opt & Quantenelekt, D-07743 Jena, Germany.
[Fortmann, C.; Przystawik, A.; Reinholz, H.; Roepke, G.; Thiele, R.; Tiggesbaeumker, J.; Truong, N. X.; Wierling, A.; Redmer, R.] Univ Rostock, Inst Phys, D-18051 Rostock, Germany.
[Faeustlin, R. R.; Duesterer, S.; Laarmann, T.; Radcliffe, P.; Toleikis, S.; Tschentscher, T.] DESY, Deutsch Elektronen Synchrotron, D-22607 Hamburg, Germany.
[Doeppner, T.; Glenzer, S. H.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Gregori, G.] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England.
[Lee, H. J.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RP Zastrau, U (reprint author), Univ Jena, Inst Opt & Quantenelekt, Max Wien Pl 1, D-07743 Jena, Germany.
EM zastrau@ioq.uni-jena.de
RI Redmer, Ronald/F-3046-2013;
OI Zastrau, Ulf/0000-0002-3575-4449; Thiele, Robert/0000-0001-8350-9942
FU German Helmholtzgemeinschaft via the Virtual Institute [VH-VI104];
German Federal Ministry for Education and Research; Deutsche
Forschungsgemeinschaft (DFG); Sonderforschungsbereich [SFB 652]; DFG [LA
1431/2-1, GRK 1355]; U. S. Department of Energy by Lawrence Livermore
National Laboratory [DE-AC52-07NA27344]; LDRDs [08-ERI-002,08-LW-004];
Alexander von Humboldt foundation; Science and Technology Facilities
Council of the United Kingdom; [FSP 301-FLASH]
FX We thankfully acknowledge financial support by the German
Helmholtzgemeinschaft via the Virtual Institute VH-VI104, the German
Federal Ministry for Education and Research via Project No. FSP
301-FLASH, and the Deutsche Forschungsgemeinschaft (DFG) via the
Sonderforschungsbereich SFB 652. T. L. acknowledges financial support
from the DFG under Grant No. LA 1431/2-1. R. R. F. received DFG funds
via Grant No. GRK 1355. The work of S. H. G. was performed under the
auspices of the U. S. Department of Energy by Lawrence Livermore
National Laboratory under Contract No. DE-AC52-07NA27344. S. H. G. was
also supported by LDRDs 08-ERI-002,08-LW-004, and the Alexander von
Humboldt foundation. The work of G. G. was partially supported by the
Science and Technology Facilities Council of the United Kingdom.
Finally, the authors are greatly indebted to the machine operators, run
coordinators, and scientific and technical teams of the FLASH facility
for enabling an outstanding performance.
NR 43
TC 56
Z9 56
U1 3
U2 12
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0045
EI 2470-0053
J9 PHYS REV E
JI Phys. Rev. E
PD DEC
PY 2008
VL 78
IS 6
AR 066406
DI 10.1103/PhysRevE.78.066406
PN 2
PG 5
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 391NS
UT WOS:000262240600071
PM 19256961
ER
PT J
AU Blume, M
AF Blume, Martin
TI Bob Siemann and PRST-AB
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Biographical-Item
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Blume, M (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
NR 1
TC 0
Z9 0
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 DEC
PY 2008
VL 11
IS 12
AR 120012
DI 10.1103/PhysRevSTAB.11.120012
PG 3
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 420FC
UT WOS:000264273300012
ER
PT J
AU Chao, AW
AF Chao, Alexander W.
TI In memory of Robert Siemann
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Biographical-Item
C1 Stanford Univ, SLAC, Stanford, CA 94309 USA.
RP Chao, AW (reprint author), Stanford Univ, SLAC, Stanford, CA 94309 USA.
NR 1
TC 0
Z9 0
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 DEC
PY 2008
VL 11
IS 12
AR 120005
DI 10.1103/PhysRevSTAB.11.120005
PG 3
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 420FC
UT WOS:000264273300005
ER
PT J
AU Ciovati, G
Gurevich, A
AF Ciovati, G.
Gurevich, A.
TI Evidence of high-field radio-frequency hot spots due to trapped vortices
in niobium cavities
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID BOUNDARIES
AB Superconducting radio-frequency (rf) cavities made of high-purity niobium exhibit strong anomalous rf losses starting at peak surface magnetic fields of about 90-100 mT in the gigahertz range. This phenomenon is referred to as "Q drop.'' Temperature maps of the cavity surface have revealed the presence of "hot spots'' in the high magnetic field region of the cavities. Several models have been proposed over the years to explain this phenomenon but there is still no experimental evidence on the mechanisms behind such hot spots. In this work we show that at least some of the hot spots are due to trapped vortices responsible for the anomalous losses. Here we report experiments in which a local thermal gradient was applied to the hot spot regions of a cavity in order to displace the vortices. Temperature maps measured before and after applying the thermal gradient unambiguously show that the hot spots do move and change their intensities, allowing us to determine changes in the hot spot positions and strengths and their effect on the cavity performance. Results on a large-grain niobium cavity clearly show a different distribution and in some cases a weakening of the intensity of the "hot spots,'' suggesting new ways of improving the cavity performance without additional material treatments.
C1 [Ciovati, G.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
[Gurevich, A.] Florida State Univ, Ctr Appl Superconduct, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
RP Ciovati, G (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
EM gciovati@jlab.org
RI Gurevich, Alex/A-4327-2008
OI Gurevich, Alex/0000-0003-0759-8941
FU Jefferson Science Associates, LLC [DE-AC05-06OR23177]
FX We would like to thank M. Morrone for the assembly/ disassembly of the
temperature mapping system and the heaters, C. Crawford and R. Geng for
helping with the Questar telescope, and P. Kushnick for cryogenic
support. This manuscript has been authored by Jefferson Science
Associates, LLC, under U. S. DOE Contract No. DE-AC05-06OR23177.
NR 23
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 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD DEC
PY 2008
VL 11
IS 12
AR 122001
DI 10.1103/PhysRevSTAB.11.122001
PG 12
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 420FC
UT WOS:000264273300018
ER
PT J
AU Goldman, T
Silbar, RR
AF Goldman, T.
Silbar, Richard R.
TI Pion linac as an energy-tagged nu source
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID PHYSICS
AB The energy spectrum and flux of neutrinos from a linear pion accelerator are calculated analytically under the assumption of a uniform accelerating gradient. The energy of a neutrino from this source reacting in a detector can be determined from timing and event position information.
C1 [Goldman, T.; Silbar, Richard R.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Goldman, T (reprint author), Los Alamos Natl Lab, Div Theoret, MS B283, Los Alamos, NM 87545 USA.
EM tgoldman@lanl.gov; silbar@lanl.gov
FU S. Department of Energy at Los Alamos National Laboratory
[DE-AC52-06NA25396]
FX We thank C. Morris for a valuable conversation. 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 11
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 DEC
PY 2008
VL 11
IS 12
AR 124701
DI 10.1103/PhysRevSTAB.11.124701
PG 6
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 420FC
UT WOS:000264273300020
ER
PT J
AU Henderson, SD
AF Henderson, Stuart D.
TI Bob Siemann and the Spallation Neutron Source: A remembrance
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Biographical-Item
C1 Oak Ridge Natl Lab, Spallat Neutron Source Project, Oak Ridge, TN 37830 USA.
RP Henderson, SD (reprint author), Oak Ridge Natl Lab, Spallat Neutron Source Project, Bldg 8600, Oak Ridge, TN 37830 USA.
NR 1
TC 0
Z9 0
U1 1
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 DEC
PY 2008
VL 11
IS 12
AR 120013
DI 10.1103/PhysRevSTAB.11.120013
PG 3
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 420FC
UT WOS:000264273300013
ER
PT J
AU Leemans, W
AF Leemans, Wim
TI Bob Siemann's contributions to advanced accelerators-a personal
perspective
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Biographical-Item
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Leemans, W (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
NR 1
TC 0
Z9 0
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 DEC
PY 2008
VL 11
IS 12
AR 120004
DI 10.1103/PhysRevSTAB.11.120004
PG 3
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 420FC
UT WOS:000264273300004
ER
PT J
AU Raubenheimer, TO
AF Raubenheimer, Tor O.
TI Bob Siemann-SLC days at SLAC
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Biographical-Item
C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
RP Raubenheimer, TO (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
NR 1
TC 0
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U1 0
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PU AMER PHYSICAL SOC
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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 DEC
PY 2008
VL 11
IS 12
AR 120011
DI 10.1103/PhysRevSTAB.11.120011
PG 2
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 420FC
UT WOS:000264273300011
ER
PT J
AU Stygar, WA
Rosenthal, SE
Ives, HC
Wagoner, TC
Allshouse, GO
Androlewicz, KE
Donovan, GL
Fehl, DL
Frese, MH
Gilliland, TL
Johnson, MF
Mills, JA
Reisman, DB
Reynolds, PG
Speas, CS
Spielman, RB
Struve, KW
Toor, A
Waisman, EM
AF Stygar, W. A.
Rosenthal, S. E.
Ives, H. C.
Wagoner, T. C.
Allshouse, G. O.
Androlewicz, K. E.
Donovan, G. L.
Fehl, D. L.
Frese, M. H.
Gilliland, T. L.
Johnson, M. F.
Mills, J. A.
Reisman, D. B.
Reynolds, P. G.
Speas, C. S.
Spielman, R. B.
Struve, K. W.
Toor, A.
Waisman, E. M.
TI Energy loss to conductors operated at lineal current densities <= 10
MA/cm: Semianalytic model, magnetohydrodynamic simulations, and
experiment
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID POST-HOLE CONVOLUTE; CONDUCTIVITY; FLOW
AB We have developed a semianalytic expression for the total energy loss to a vacuum transmission-line electrode operated at high lineal current densities. (We define the lineal current density j(l) equivalent to B/mu(0) to be the current per unit electrode width, where B is the magnetic field at the electrode surface and mu(0) is the permeability of free space.) The expression accounts for energy loss due to Ohmic heating, magnetic diffusion, j x B work, and the increase in the transmission line's vacuum inductance due to motion of the vacuum-electrode boundary. The sum of these four terms constitutes the Poynting fluence at the original location of the boundary. The expression assumes that (i) the current distribution in the electrode can be approximated as one-dimensional and planar; (ii) the current I(t) = 0 for t < 0, and I(t) alpha t for t >= 0; (iii) j(l) <= 10 MA/cm; and (iv) the current-pulse width is between 50 and 300 ns. Under these conditions we find that, to first order, the total energy lost per unit electrode-surface area is given by Wt(t) = alpha t(beta)B gamma(t) + zeta(t kappa)B lambda(t), where B(t) is the nominal magnetic field at the surface. The quantities alpha, beta, gamma, zeta, kappa, and lambda are material constants that are determined by normalizing the expression for Wt(t) to the results of 1D magnetohydrodynamic MACH2 simulations. For stainless-steel electrodes operated at current densities between 0.5 and 10 MA/cm, we find that alpha = 3: 36 x 10(5), beta = 1/2, gamma = 2, zeta = 4: 47 x 10(4), kappa = 5/4, and lambda = 4 (in SI units). An effective time-dependent resistance, appropriate for circuit simulations of pulsed-power accelerators, is derived from Wt(t). Resistance-model predictions are compared to energy-loss measurements made with stainless-steel electrodes operated at peak lineal current densities as high as 12 MA/cm (and peak currents as high as 23 MA). The predictions are consistent with the measurements, to within experimental uncertainties. We also find that a previously used electrode-energy-loss model overpredicts the measurements by as much as an order of magnitude.
C1 [Stygar, W. A.; Rosenthal, S. E.; Allshouse, G. O.; Donovan, G. L.; Fehl, D. L.; Mills, J. A.; Speas, C. S.; Struve, K. W.; Waisman, E. M.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Ives, H. C.] EG&G, Albuquerque, NM 87107 USA.
[Wagoner, T. C.; Androlewicz, K. E.; Gilliland, T. L.; Spielman, R. B.] Ktech Corp Inc, Albuquerque, NM 87123 USA.
[Frese, M. H.] NumerEx, Albuquerque, NM 87106 USA.
[Johnson, M. F.] Team Specialty Prod Corp, Albuquerque, NM 87123 USA.
[Reisman, D. B.; Toor, A.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Johnson, MF (reprint author), Sandia Natl Labs, Albuquerque, NM 87185 USA.
NR 45
TC 8
Z9 10
U1 0
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 DEC
PY 2008
VL 11
IS 12
AR 120401
DI 10.1103/PhysRevSTAB.11.120401
PG 14
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 420FC
UT WOS:000264273300015
ER
PT J
AU Zimmermann, F
AF Zimmermann, Frank
TI Robert H. Siemann-encounters and essays
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Biographical-Item
C1 [Zimmermann, Frank] CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland.
[Zimmermann, Frank] APS, New York, NY 11961 USA.
RP Zimmermann, F (reprint author), CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland.
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 DEC
PY 2008
VL 11
IS 12
AR 120001
DI 10.1103/PhysRevSTAB.11.120001
PG 4
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 420FC
UT WOS:000264273300001
ER
PT J
AU Antao, S
Hassan, I
Mulder, W
Lee, P
AF Antao, Sytle M.
Hassan, Ishmael
Mulder, Willem H.
Lee, Peter L.
TI The R3c -> R3m transition in nitratine, NaNO(3), and implications for
calcite, CaCO(3)
SO PHYSICS AND CHEMISTRY OF MINERALS
LA English
DT Article
DE Sodium nitrate; NaNO(3); Nitratine; Order-disorder transition
ID DISORDER PHASE-TRANSITION; SODIUM-NITRATE; NEUTRON-DIFFRACTION; POWDER
DIFFRACTION; CRYSTAL-STRUCTURES; ELECTRON-DENSITY; X-RAY; ARAGONITE;
PARAMETERS; MAGNESITE
AB The temperature dependences of the crystal structure and superstructure intensities in sodium nitrate, mineral name nitratine, NaNO3, were studied using Rietveld structure refinements based on synchrotron powder Xray diffraction. Nitratine transforms from R3c to R3m at Tc = 552( 1) K. A NO3 group occupies, statistically, two positions with equal frequency in the disordered R3m phase, but with unequal frequency in the partially ordered R3c phase. One position for the NO3 group is rotated by 60 degrees or 180 degrees with respect to the other. The occupancy of the two orientations in the R3c phase is obtained from the occupancy factor, x, for the O1 site and gives rise to the order parameter, S = 2x - 1, where S is 0 at Tc and 1 at 0 K. The NO3 groups rotate in a rapid process from about 541 to Tc, where the a axis contracts. Using a modified Bragg- Williams model, a good fit was obtained for the normalized intensities ( that is, normalized, NI 1/ 2) for the ( 113) and ( 211) reflections in R3c NaNO3; and indicates a second- order transition. Using the same model, a reasonable fit was obtained for the order parameter, S, and also supports a second- order transition.
C1 [Antao, Sytle M.; Lee, Peter L.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Hassan, Ishmael; Mulder, Willem H.] Univ W Indies, Dept Chem, Kingston 7, Jamaica.
RP Antao, S (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
EM antao@ucalgary.ca
FU US Department of Energy, Office of Science, Office of Basic Energy
Sciences [DEAC02-06CH11357]
FX The authors thank the anonymous reviewers for useful comments. XRD data
were collected at the X-ray Operations and Research beam-lines 1-BM and
11-BM, Advanced Photon Source, Argonne National Laboratory. 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.
DEAC02-06CH11357.
NR 41
TC 11
Z9 11
U1 2
U2 12
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0342-1791
J9 PHYS CHEM MINER
JI Phys. Chem. Miner.
PD DEC
PY 2008
VL 35
IS 10
BP 545
EP 557
DI 10.1007/s00269-008-0232-8
PG 13
WC Materials Science, Multidisciplinary; Mineralogy
SC Materials Science; Mineralogy
GA 374IN
UT WOS:000261037100001
ER
PT J
AU Crease, R
AF Crease, Robert P.
TI The National Synchrotron Light Source, Part I: Bright Idea
SO PHYSICS IN PERSPECTIVE
LA English
DT Article
DE Kenneth Green; Renata Chasman; Martin Blume; Sam Krinsky; Arie van
Steenbergen; Richard Watson; Brookhaven National Laboratory; National
Synchrotron Light Source; synchrotron radiation; Chasman-Green lattice;
accelerators
ID RADIATION
AB The National Synchrotron Light Source (NSLS) was the first facility designed and built specifically for producing and exploiting synchrotron radiation. It was also the first facility to incorporate the Chasman-Green lattice for maximizing brightness. The NSLS was a $24-million project conceived about 1970. It was officially proposed in 1976, and its groundbreaking took place in 1978. Its construction was a key episode in Brookhaven's history, in the transition of synchrotron radiation from a novelty to a commodity, and in the transition of synchrotron-radiation scientists from parasitic to autonomous researchers. The way the machine was conceived, designed, promoted, and constructed illustrates much both about the tensions and tradeoffs faced by large scientific projects in the age of big science. In this article, the first of two parts, I cover the conception, design, and planning of the NSLS up to its groundbreaking. Part II, covering its construction, will appear in the next issue.
C1 [Crease, Robert P.] SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA.
[Crease, Robert P.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Crease, R (reprint author), SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA.
EM rcrease@notes.cc.sunysb.edu
NR 37
TC 9
Z9 9
U1 0
U2 5
PU BIRKHAUSER VERLAG AG
PI BASEL
PA VIADUKSTRASSE 40-44, PO BOX 133, CH-4010 BASEL, SWITZERLAND
SN 1422-6944
J9 PHYS PERSPECT
JI Phys. Perspect.
PD DEC
PY 2008
VL 10
IS 4
BP 438
EP 467
DI 10.1007/s00016-007-0357-z
PG 30
WC History & Philosophy Of Science
SC History & Philosophy of Science
GA 379WT
UT WOS:000261427700004
ER
PT J
AU Balakumar, BJ
Orlicz, GC
Tomkins, CD
Prestridge, KP
AF Balakumar, B. J.
Orlicz, G. C.
Tomkins, C. D.
Prestridge, K. P.
TI Simultaneous particle-image velocimetry-planar laser-induced
fluorescence measurements of Richtmyer-Meshkov instability growth in a
gas curtain with and without reshock
SO PHYSICS OF FLUIDS
LA English
DT Article
ID THIN FLUID LAYER; SCALE PERTURBATIONS; RAYLEIGH-TAYLOR; SHOCK;
TURBULENCE; FLOWS; OSCILLATIONS; TRANSITION; SIMULATION; INTERFACE
AB The structure of the concentration and velocity fields in a light-heavy-light fluid layer subjected to an impulsive acceleration by a shock wave (Richtmyer-Meshkov instability) is studied using simultaneous particle-image velocimetry and planar laser-induced fluorescence (PLIF) measurements (performed in such flows for the first time). The initial condition prior to shock impact is accurately characterized using calibrated PLIF measurements to enable comparisons of the evolving structure to numerical simulations. Experiments performed on a SF(6) curtain in air (Atwood number, At=0.67), after single shock by a Mach 1.2 shock wave and reshock by the reflected wave, show that the reshock wave has a dramatic impact on the evolution of the unstable structure. After first shock and in the absence of reshock(s), the structure widths agree well with an analytical extension to the nonlinear point vortex model [J. W. Jacobs et al., "Nonlinear growth of the shock-accelerated instability of a thin fluid layer," J. Fluid Mech. 295, 23 (1995)] that accounts for the nonuniform spacing of the row of counter-rotating vortices that drive the flow. However, upon reshock, the width deviates significantly from the singly shocked case, and a substantial rise in the growth rate is observed. Enhanced mixing, destruction of the ordered velocity field, and an increase in both the positive and negative circulations ensue. Large velocity fluctuations relative to the mean flow, and the advection of a wide spectrum of vortex scales combine to mix the flow well and create turbulent conditions in the reshocked structure. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3041705]
C1 [Balakumar, B. J.; Orlicz, G. C.; Tomkins, C. D.; Prestridge, K. P.] Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA.
RP Balakumar, BJ (reprint author), Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA.
EM bbalasub@lanl.gov
RI Prestridge, Kathy/C-1137-2012
OI Prestridge, Kathy/0000-0003-2425-5086
FU Department of Energy [DE-AC52-06NA25396]
FX This work was supported by the Department of Energy under Contract No.
DE-AC52-06NA25396.
NR 44
TC 31
Z9 35
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 1070-6631
J9 PHYS FLUIDS
JI Phys. Fluids
PD DEC
PY 2008
VL 20
IS 12
AR 124103
DI 10.1063/1.3041705
PG 13
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 391IE
UT WOS:000262226200015
ER
PT J
AU Eyink, GL
AF Eyink, Gregory L.
TI Turbulent flow in pipes and channels as cross-stream "inverse cascades"
of vorticity
SO PHYSICS OF FLUIDS
LA English
DT Article
ID HIGH-TEMPERATURE SUPERCONDUCTORS; MEAN MOMENTUM BALANCE; WALL
TURBULENCE; BOUNDARY-LAYER; SUPERFLUID-HELIUM; MODEL; DYNAMICS; FIELDS;
MOTION; MECHANISM
AB A commonplace view of pressure-driven turbulence in pipes and channels is as "cascades" of streamwise momentum toward the viscous layer at the wall. We present in this paper an alternative picture of these flows as "inverse cascades" of spanwise vorticity in the cross-stream direction but away from the viscous sublayer. We show that there is a constant spatial flux of spanwise vorticity due to vorticity conservation and that this flux is necessary to produce pressure drop and energy dissipation. The vorticity transport is shown to be dominated by viscous diffusion at distances closer to the wall than the peak Reynolds stress, well into the classical log layer. The Perry-Chong model based on "representative" hairpin/horseshoe vortices predicts a single sign of the turbulent vorticity flux over the whole log layer, whereas the actual flux must change sign at the location of the Reynolds-stress maximum. Sign reversal may be achieved by assuming a slow power-law decay of the Townsend "eddy-intensity function" for wall-normal distances greater than the hairpin length scale. The vortex-cascade picture presented here has a close analog in the theory of quantum superfluids and superconductors, the "phase slippage" of quantized vortex lines. Most of our results should therefore apply as well to superfluid turbulence in pipes and channels. We also discuss issues about drag reduction from this perspective. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3013635]
C1 [Eyink, Gregory L.] Johns Hopkins Univ, Baltimore, MD 21218 USA.
[Eyink, Gregory L.] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Eyink, GL (reprint author), Johns Hopkins Univ, Baltimore, MD 21218 USA.
NR 71
TC 17
Z9 17
U1 1
U2 4
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 DEC
PY 2008
VL 20
IS 12
AR 125101
DI 10.1063/1.3013635
PG 13
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 391IE
UT WOS:000262226200017
ER
PT J
AU Ahn, JW
Boedo, JA
Maingi, R
Soukhanovskii, V
AF Ahn, J-W.
Boedo, J. A.
Maingi, R.
Soukhanovskii, V.
CA NSTX Res Team
TI The role of parallel heat transport in the relation between upstream
scrape-off layer widths and target heat flux width in H-mode plasmas of
the National Spherical Torus Experiment
SO PHYSICS OF PLASMAS
LA English
DT Article
DE plasma boundary layers; plasma density; plasma instability; plasma
probes; plasma sheaths; plasma temperature; plasma toroidal confinement;
plasma transport processes; Tokamak devices
ID DIII-D TOKAMAK; ALCATOR C-MOD; POWER BALANCE; SOL TRANSPORT; CHAPTER 1;
DIVERTOR; NSTX; JET; DISCHARGES; BOUNDARY
AB The physics of parallel heat transport was tested in the scrape-off layer (SOL) plasma of the National Spherical Torus Experiment [M. Ono , Nucl. Fusion 40, 557 (2000); S. M. Kaye , ibid. 45, S168 (2005)] tokamak by comparing the upstream electron temperature (T(e)) and density (n(e)) profiles measured by the midplane reciprocating probe to the heat flux (q(perpendicular to)) profile at the divertor plate measured by an infrared camera. It is found that electron conduction explains the near SOL width data reasonably well while the far SOL, which is in the sheath limited regime, requires an ion heat flux profile broader than the electron one to be consistent with the experimental data. The measured plasma parameters indicate that the SOL energy transport should be in the conduction-limited regime for R-R(sep) (radial distance from the separatrix location) < 2-3 cm. The SOL energy transport should transition to the sheath-limited regime for R-R(sep)>2-3 cm. The T(e), n(e), and q(perpendicular to) profiles are better described by an offset exponential function instead of a simple exponential. The conventional relation between midplane electron temperature decay length (lambda(Te)) and target heat flux decay length (lambda(q)) is lambda(Te)=7/2 lambda(q), whereas the newly derived relation, assuming offset exponential functional forms, implies lambda(Te)=(2-2.5)lambda(q). The measured values of lambda(Te)/lambda(q) differ from the new prediction by 25%-30%. The measured lambda(q) values in the far SOL (R-R(sep)>2-3 cm) are 9-10 cm, while the expected values are 2.7 0.7 without tearing modes driven by the RMP field. For DIII-D H-mode plasmas the validity of this approach still needs to be established. In this paper a method is discussed to diagnose the degree of edge stochastization based on a comparison between modeled magnetic footprints on the divertor targets and experimental data. Clear evidence is presented for the existence of a generic separatrix perturbation causing striation of target particle fluxes. However, heat fluxes into these striations are small. This observation can be explained by accounting for the different heat and particle source locations and the 3D trajectories of the open, perturbed field lines toward the divertor target. Analysis of the transport characteristics filling the perturbed separatrix lobes based on initial EMC3/EIRENE modeling suggests the existence of open field lines connecting the stochastic edge to the target pattern. However, the width and inward most extent of the actual stochastic layer cannot yet be quantified.
C1 [Schmitz, O.; Frerichs, H.; Finken, K. H.; Lehnen, M.; Nicolai, A.; Reiter, D.; Samm, U.; Stoschus, H.; Unterberg, B.] Forschungszentrum Julich, IEF4 Plasmaphys, D-52425 Julich, Germany.
[Evans, T. E.; Schaffer, M. J.; West, W. P.; Brooks, N. H.; Burrell, K. H.; deGrassie, J. S.; Gohil, P.; Leonard, A. W.; Osborne, T. H.] Gen Atom Co, San Diego, CA 92186 USA.
[Fenstermacher, M. E.; Groth, M.; Joseph, I.; Lasnier, C. J.] Lawrence Livermore Natl Lab, Livermore, CA USA.
[Jakubowski, M. W.; Feng, Y.] Max Planck Inst Plasma Phys, Greifswald, Germany.
[Wingen, A.; Spatschek, K. H.] Univ Dusseldorf, ITP 1, D-40225 Dusseldorf, Germany.
[Mordijck, S.; Moyer, R. A.] Univ Calif San Diego, La Jolla, CA USA.
[Watkins, J. G.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Unterberg, B.] Oak Ridge Inst Sci Educ, Oak Ridge, TN USA.
RP Schmitz, O (reprint author), Forschungszentrum Julich, IEF4 Plasmaphys, Postfach 1913, D-52425 Julich, Germany.
EM o.schmitz@fz-juelich.de
RI Groth, Mathias/G-2227-2013; Wingen, Andreas/K-8822-2013; Unterberg,
Ezekial/F-5240-2016;
OI Unterberg, Ezekial/0000-0003-1353-8865; Wingen,
Andreas/0000-0001-8855-1349; Unterberg, Bernhard/0000-0003-0866-957X
NR 70
TC 82
Z9 82
U1 3
U2 17
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0741-3335
J9 PLASMA PHYS CONTR F
JI Plasma Phys. Control. Fusion
PD DEC
PY 2008
VL 50
IS 12
AR 124029
DI 10.1088/0741-3335/50/12/124029
PG 19
WC Physics, Fluids & Plasmas
SC Physics
GA 374MB
UT WOS:000261046600039
ER
PT J
AU Singleton, RL
Brown, LS
AF Singleton, Robert L., Jr.
Brown, Lowell S.
TI The energy partitioning of non-thermal particles in a plasma: the
Coulomb logarithm revisited
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article; Proceedings Paper
CT 35th European-Physical-Society Conference on Plasma Physics
CY JUN 09-13, 2008
CL Hersonissos, GREECE
SP European Phys Soc
AB The charged particle stopping power in a highly ionized and weakly to moderately coupled plasma has been calculated exactly to leading and next-to-leading accuracy in the plasma density by Brown, Preston and Singleton (BPS). Since the calculational techniques of BPS might be unfamiliar to some, and since the same methodology can also be used for other energy transport phenomena, we will review the main ideas behind the calculation. BPS used their stopping power calculation to derive a Fokker-Planck equation, also accurate to leading and next-to-leading orders, and we will also review this. We use this Fokker-Planck equation to compute the electron-ion energy partitioning of a charged particle traversing a plasma. The motivation for this application is ignition for inertial confinement fusion-more energy delivered to the ions means a better chance of ignition, and conversely. It is therefore important to calculate the fractional energy loss to electrons and ions as accurately as possible. One method by which one calculates the electron-ion energy splitting of a charged particle traversing a plasma involves integrating the stopping power dE/dx. However, as the charged particle slows down and becomes thermalized into the background plasma, this method of calculating the electron-ion energy splitting breaks down. As a result, it suffers a systematic error that may be as large as T/E(0), where T is the plasma temperature and E(0) is the initial energy of the charged particle. The formalism presented here is designed to account for the thermalization process and it provides results that are near-exact.
C1 [Singleton, Robert L., Jr.; Brown, Lowell S.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Singleton, RL (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
NR 13
TC 1
Z9 1
U1 0
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0741-3335
J9 PLASMA PHYS CONTR F
JI Plasma Phys. Control. Fusion
PD DEC
PY 2008
VL 50
IS 12
AR 124016
DI 10.1088/0741-3335/50/12/124016
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 374MB
UT WOS:000261046600026
ER
PT J
AU Stoeckl, C
Anderson, KS
Betti, R
Boehly, TR
Delettrez, JA
Frenje, JA
Goncharov, VN
Glebov, VY
Kelly, JH
MacKinnon, AJ
McCrory, RL
Meyerhofer, DD
Morse, SFB
Myatt, JF
Norreys, PA
Nilson, PM
Petrasso, RD
Sangster, TC
Solodov, AA
Stephens, RB
Storm, M
Theobald, W
Yaakobi, B
Waxer, LJ
Zhou, CD
AF Stoeckl, C.
Anderson, K. S.
Betti, R.
Boehly, T. R.
Delettrez, J. A.
Frenje, J. A.
Goncharov, V. N.
Glebov, V. Yu
Kelly, J. H.
MacKinnon, A. J.
McCrory, R. L.
Meyerhofer, D. D.
Morse, S. F. B.
Myatt, J. F.
Norreys, P. A.
Nilson, P. M.
Petrasso, R. D.
Sangster, T. C.
Solodov, A. A.
Stephens, R. B.
Storm, M.
Theobald, W.
Yaakobi, B.
Waxer, L. J.
Zhou, C. D.
TI Fast-ignition target design and experimental-concept validation on OMEGA
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article; Proceedings Paper
CT 35th European-Physical-Society Conference on Plasma Physics
CY JUN 09-13, 2008
CL Hersonissos, GREECE
SP European Phys Soc
ID INERTIAL-CONFINEMENT FUSION; RELATIVISTIC ELECTRONS; LASER; PETAWATT;
TRANSPORT; FACILITY; COMPRESSION; PERFORMANCE; IMPLOSIONS; EFFICIENCY
AB A comprehensive scientific program is being pursued at LLE to explore the physics of fast ignition. The OMEGA EP Laser was completed in April 2008, adjacent to the 60 beam, 30 kJ OMEGA Laser Facility. OMEGA EP consists of four beamlines with a NIF-like architecture, each delivering up to 6.5 kJ of UV laser energy in long pulse (ns) mode into the OMEGA EP target chamber. Two of the beamlines can operate as high-energy petawatt lasers, with up to 2.6 kJ each with 10 ps pulse duration. These beams can either be injected into the OMEGA EP target chamber or combined collinearly into the existing OMEGA target chamber for integrated fast-ignitor experiments. Fuel-assembly experiments on OMEGA have achieved high fuel areal densities, and the effects of a cone on the fuel assembly are being studied. Experiments on short-pulse laser systems in collaboration with other institutions are being pursued to investigate the conversion efficiency from laser energy to fast electrons. A coherent transition radiation diagnostic to study the transport of the electrons in high-density material is being developed. Integrated experiments with room-temperature targets on OMEGA will be performed in 2008. Simulations of these integrated experiments show significant heating of up to 1 keV due to the hot electrons from the short-pulse laser.
C1 [Stoeckl, C.; Anderson, K. S.; Betti, R.; Boehly, T. R.; Delettrez, J. A.; Goncharov, V. N.; Glebov, V. Yu; Kelly, J. H.; McCrory, R. L.; Meyerhofer, D. D.; Morse, S. F. B.; Myatt, J. F.; Nilson, P. M.; Sangster, T. C.; Solodov, A. A.; Storm, M.; Theobald, W.; Yaakobi, B.; Waxer, L. J.; Zhou, C. D.] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA.
[Betti, R.; Meyerhofer, D. D.] Univ Rochester, Dept Mech Engn, Rochester, NY 14623 USA.
[Betti, R.; Meyerhofer, D. D.] Univ Rochester, Dept Phys, Rochester, NY 14623 USA.
[Betti, R.; Meyerhofer, D. D.] Univ Rochester, Fus Sci Ctr, Rochester, NY 14623 USA.
[Frenje, J. A.; Petrasso, R. D.] MIT, Cambridge, MA 02139 USA.
[MacKinnon, A. J.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Norreys, P. A.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Stephens, R. B.] Gen Atom Co, San Diego, CA 92186 USA.
RP Stoeckl, C (reprint author), Univ Rochester, Laser Energet Lab, 250 E River Rd, Rochester, NY 14623 USA.
RI Goncharov, Valeri/H-4471-2011; MacKinnon, Andrew/P-7239-2014;
OI MacKinnon, Andrew/0000-0002-4380-2906; Stephens,
Richard/0000-0002-7034-6141
NR 56
TC 5
Z9 5
U1 1
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0741-3335
J9 PLASMA PHYS CONTR F
JI Plasma Phys. Control. Fusion
PD DEC
PY 2008
VL 50
IS 12
AR 124044
DI 10.1088/0741-3335/50/12/124044
PG 12
WC Physics, Fluids & Plasmas
SC Physics
GA 374MB
UT WOS:000261046600054
ER
PT J
AU Coppe, JP
Patil, CK
Rodier, F
Sun, Y
Munoz, DP
Goldstein, J
Nelson, PS
Desprez, PY
Campisi, J
AF Coppe, Jean-Philippe
Patil, Christopher K.
Rodier, Francis
Sun, Yu
Munoz, Denise P.
Goldstein, Joshua
Nelson, Peter S.
Desprez, Pierre-Yves
Campisi, Judith
TI Senescence-Associated Secretory Phenotypes Reveal Cell-Nonautonomous
Functions of Oncogenic RAS and the p53 Tumor Suppressor
SO PLOS BIOLOGY
LA English
DT Article
ID DNA-DAMAGE RESPONSE; IN-VIVO; BREAST-CANCER; REPLICATIVE SENESCENCE;
HUMAN FIBROBLASTS; EPITHELIAL-CELLS; AGING PRIMATES; GROWTH ARREST;
LIFE-SPAN; TUMORIGENESIS
AB Cellular senescence suppresses cancer by arresting cell proliferation, essentially permanently, in response to oncogenic stimuli, including genotoxic stress. We modified the use of antibody arrays to provide a quantitative assessment of factors secreted by senescent cells. We show that human cells induced to senesce by genotoxic stress secrete myriad factors associated with inflammation and malignancy. This senescence-associated secretory phenotype (SASP) developed slowly over several days and only after DNA damage of sufficient magnitude to induce senescence. Remarkably similar SASPs developed in normal fibroblasts, normal epithelial cells, and epithelial tumor cells after genotoxic stress in culture, and in epithelial tumor cells in vivo after treatment of prostate cancer patients with DNA-damaging chemotherapy. In cultured premalignant epithelial cells, SASPs induced an epithelial-mesenchyme transition and invasiveness, hallmarks of malignancy, by a paracrine mechanism that depended largely on the SASP factors interleukin (IL)-6 and IL-8. Strikingly, two manipulations markedly amplified, and accelerated development of, the SASPs: oncogenic RAS expression, which causes genotoxic stress and senescence in normal cells, and functional loss of the p53 tumor suppressor protein. Both loss of p53 and gain of oncogenic RAS also exacerbated the promalignant paracrine activities of the SASPs. Our findings define a central feature of genotoxic stress-induced senescence. Moreover, they suggest a cell-nonautonomous mechanism by which p53 can restrain, and oncogenic RAS can promote, the development of age-related cancer by altering the tissue microenvironment.
C1 [Coppe, Jean-Philippe; Patil, Christopher K.; Rodier, Francis; Munoz, Denise P.; Goldstein, Joshua; Desprez, Pierre-Yves; Campisi, Judith] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
[Rodier, Francis; Munoz, Denise P.; Campisi, Judith] Buck Inst Age Res, Novato, CA USA.
[Sun, Yu; Nelson, Peter S.] Fred Hutchinson Canc Res Ctr, Div Human Biol, Seattle, WA 98104 USA.
[Desprez, Pierre-Yves] Calif Pacific Med Ctr, Res Inst, San Francisco, CA USA.
RP Campisi, J (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
EM jcampisi@lbl.gov
FU National Institutes of Health [AG09909, AG017242, CA126540, AG000266];
Pacific Northwest Prostate Cancer [CA97186]; Larry L. Hillblom
Foundation
FX This work was supported by grants from the National Institutes of Health
(research grants AG09909 & AG017242 to JC; CA126540 to PSN and JC;
training grant AG000266 for JG and CKP); the Pacific Northwest Prostate
Cancer SPORE CA97186) and Larry L. Hillblom Foundation (fellowship to
CKP).
NR 80
TC 841
Z9 860
U1 11
U2 83
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1544-9173
J9 PLOS BIOL
JI PLoS. Biol.
PD DEC
PY 2008
VL 6
IS 12
BP 2853
EP 2868
DI 10.1371/journal.pbio.0060301
PG 16
WC Biochemistry & Molecular Biology; Biology
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
Topics
GA 386WQ
UT WOS:000261913700023
PM 19053174
ER
PT J
AU Lee, HY
Perelson, AS
Park, SC
Leitner, T
AF Lee, Ha Youn
Perelson, Alan S.
Park, Su-Chan
Leitner, Thomas
TI Dynamic Correlation between Intrahost HIV-1 Quasispecies Evolution and
Disease Progression
SO PLOS COMPUTATIONAL BIOLOGY
LA English
DT Article
ID IMMUNODEFICIENCY-VIRUS TYPE-1; AMINO-ACID SITES; CD4(+) T-CELLS;
POSITIVE SELECTION; PRIMARY INFECTION; LIKELIHOOD METHOD; RECOMBINATION;
ESCAPE; SEQUENCES; INDIVIDUALS
AB Quantifying the dynamics of intrahost HIV-1 sequence evolution is one means of uncovering information about the interaction between HIV-1 and the host immune system. In the chronic phase of infection, common dynamics of sequence divergence and diversity have been reported. We developed an HIV-1 sequence evolution model that simulated the effects of mutation and fitness of sequence variants. The amount of evolution was described by the distance from the founder strain, and fitness was described by the number of offspring a parent sequence produces. Analysis of the model suggested that the previously observed saturation of divergence and decrease of diversity in later stages of infection can be explained by a decrease in the proportion of offspring that are mutants as the distance from the founder strain increases rather than due to an increase of viral fitness. The prediction of the model was examined by performing phylogenetic analysis to estimate the change in the rate of evolution during infection. In agreement with our modeling, in 13 out of 15 patients (followed for 3-12 years) we found that the rate of intrahost HIV-1 evolution was not constant but rather slowed down at a rate correlated with the rate of CD4+ T-cell decline. The correlation between the dynamics of the evolutionary rate and the rate of CD4+ T-cell decline, coupled with our HIV-1 sequence evolution model, explains previously conflicting observations of the relationships between the rate of HIV-1 quasispecies evolution and disease progression.
C1 [Lee, Ha Youn] Univ Rochester, Med Ctr, Dept Biostat & Computat Biol, New York, NY USA.
[Perelson, Alan S.; Leitner, Thomas] Los Alamos Natl Lab, Los Alamos, NM USA.
[Park, Su-Chan] Univ Cologne, Inst Theoret Phys, D-5000 Cologne, Germany.
RP Lee, HY (reprint author), Univ Rochester, Med Ctr, Dept Biostat & Computat Biol, New York, NY USA.
EM hayoun@bst.rochester.edu
FU University of Rochester Developmental Center for AIDS Research National
Institutes of Health (NIH) [P30AI078498]; US Department of Energy (DOE)
[DE-AC52-06NA25396]; NIH-DOE interagency agreement [Y1-AI-1500-06]; NIH
grants [AI28433, RR06555]
FX This research was supported in part by the University of Rochester
Developmental Center for AIDS Research National Institutes of Health
(NIH) P30AI078498 (HL). Portions of this work were done under the
auspices of the US Department of Energy (DOE) under contract
DE-AC52-06NA25396, an NIH-DOE interagency agreement Y1-AI-1500-06 (TL),
and NIH grants AI28433 and RR06555 (ASP).
NR 62
TC 42
Z9 42
U1 1
U2 6
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1553-734X
J9 PLOS COMPUT BIOL
JI PLoS Comput. Biol.
PD DEC
PY 2008
VL 4
IS 12
AR e1000240
DI 10.1371/journal.pcbi.1000240
PG 14
WC Biochemical Research Methods; Mathematical & Computational Biology
SC Biochemistry & Molecular Biology; Mathematical & Computational Biology
GA 415HB
UT WOS:000263923800015
PM 19079613
ER
PT J
AU Maiti, A
Gee, RH
Weisgraber, T
Chinn, S
Maxwell, RS
AF Maiti, A.
Gee, R. H.
Weisgraber, T.
Chinn, S.
Maxwell, R. S.
TI Constitutive modeling of radiation effects on the permanent set in a
silicone elastomer
SO POLYMER DEGRADATION AND STABILITY
LA English
DT Article
DE Radiation effects; Constitutive model; Siloxanes; Permanent set
ID CHEMICAL STRESS-RELAXATION; POLYMER NETWORKS; PARTICLE-SIZE; BEHAVIOR;
STRAIN; SIMULATIONS; ELASTICITY
AB When a networked polymeric composite under high stress is subjected to irradiation, the resulting chemical changes like chain scissioning and crosslink formation can lead to permanent set and altered elastic modulus. Using a commercial silicone elastomer as a specific example we show that a simple 2-stage Tobolsky model in conjunction with Fricker's stress transfer function can quantitatively reproduce all experimental data as a function of radiation dosage and the static strain at which radiation is turned on, including permanent set, stress-strain response, and net crosslink density. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Maiti, A.; Gee, R. H.; Weisgraber, T.; Chinn, S.; Maxwell, R. S.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Maiti, A (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM amaiti@llnl.gov
RI Chinn, Sarah/E-1195-2011
FU U.S. Department of Energy; Lawrence Livermore National Laboratory
[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
DE-AC52-07NA27344.
NR 22
TC 7
Z9 7
U1 1
U2 10
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0141-3910
J9 POLYM DEGRAD STABIL
JI Polym. Degrad. Stabil.
PD DEC
PY 2008
VL 93
IS 12
BP 2226
EP 2229
DI 10.1016/j.polymdegradstab.2008.05.023
PG 4
WC Polymer Science
SC Polymer Science
GA 386BJ
UT WOS:000261857000022
ER
PT J
AU Zucker, A
AF Zucker, Alexander
TI ALVIN M. WEINBERG 20 APRIL 1915 . 18 OCTOBER 2006
SO PROCEEDINGS OF THE AMERICAN PHILOSOPHICAL SOCIETY
LA English
DT Biographical-Item
C1 [Zucker, Alexander] Univ Tennessee, Knoxville, TN 37996 USA.
[Zucker, Alexander] Oak Ridge Natl Lab, Oak Ridge, TN USA.
RP Zucker, A (reprint author), Univ Tennessee, Knoxville, TN 37996 USA.
NR 1
TC 0
Z9 0
U1 0
U2 2
PU AMER PHILOSOPHICAL SOC
PI PHILADELPHIA
PA 104 SOUTH FIFTH ST, PHILADELPHIA, PA 19106-3387 USA
SN 0003-049X
J9 P AM PHILOS SOC
JI Proc. Amer. Philos. Soc.
PD DEC
PY 2008
VL 152
IS 4
BP 571
EP 576
PG 6
WC Humanities, Multidisciplinary
SC Arts & Humanities - Other Topics
GA 444NC
UT WOS:000265986700012
ER
PT J
AU Tasora, A
Negrut, D
Anitescu, M
AF Tasora, A.
Negrut, D.
Anitescu, M.
TI Large-scale parallel multi-body dynamics with frictional contact on the
graphical processing unit
SO PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART K-JOURNAL OF
MULTI-BODY DYNAMICS
LA English
DT Article
DE graphical processing unit programming; parallel multi-body dynamics;
frictional contact simulation; complementarity-based model
ID RIGID-BODY DYNAMICS; COULOMB-FRICTION; CONVERGENCE; SIMULATION; SYSTEMS;
BODIES
AB In the context of simulating the frictional contact dynamics of large systems of rigid bodies, this paper reviews a novel method for solving large cone complementarity problems by means of a fixed-point iteration algorithm. The method is an extension of the Gauss-Seidel and Gauss-Jacobi methods with over-relaxation for symmetric convex linear complementarity problems. Convergent under fairly standard assumptions, the method is implemented in a parallel framework by using a single instruction multiple data Computation paradigm promoted by the Compute Unified Device Architecture library for graphical processing unit programming. The framework Supports the simulation of problems with more than one million bodies in contact. Simulation thus becomes a viable tool for investigating the dynamics of complex systems such as ground vehicles running on sand, powder composites, and granular material flow.
C1 [Negrut, D.] Univ Wisconsin, Dept Mech Engn, Madison, WI 53706 USA.
[Tasora, A.] Univ Parma, Dept Mech Engn, I-43100 Parma, Italy.
[Anitescu, M.] Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA.
RP Negrut, D (reprint author), Univ Wisconsin, Dept Mech Engn, 1513 Univ Ave,2035ME, Madison, WI 53706 USA.
EM negrut@wisc.edu
RI Tasora, Alessandro/G-2592-2010
FU National Science Foundation [CMMI-0700191]; US Department of Energy
[DE-AC02-06CH11357]
FX Financial support for the second author is provided in part by National
Science Foundation under Grant No. CMMI-0700191. A. Tasora and D. Negrut
thank the NVIDIA corporation for sponsoring their research programs in
the area of high-performance multi-body dynamics simulation. M. Anitescu
was supported by Contract DE-AC02-06CH11357 of the US Department of
Energy.
NR 43
TC 29
Z9 29
U1 1
U2 2
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 1464-4193
EI 2041-3068
J9 P I MECH ENG K-J MUL
JI Proc. Inst. Mech Eng Pt K-J Multi-Body Dyn.
PD DEC
PY 2008
VL 222
IS 4
BP 315
EP 326
DI 10.1243/14644193JMBD154
PG 12
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 390YU
UT WOS:000262200400007
ER
PT J
AU Rivkin, CH
AF Rivkin, Carl H.
TI NFPA's Hydrogen Technologies Code Project
SO PROCESS SAFETY PROGRESS
LA English
DT Article
DE hydrogen; codes; energy; risk
AB This article discusses the development of National Fire Protection Association 2 (NFPA), a comprehensive hydrogen safety code. It analyses the contents of this document with particular attention focussed on new requirements for setting hydrogen storage systems. These new requirements use computational fluid dynamic modeling and risk assessment procedures technical analyses and defined risk criteria. The intent is to develop requirements based on procedures that can be replicated based on the information provided in the code document. This code will require documentation of the modeling inputs and risk criteria and analyses in the supporting information.
This article also includes a description of the codes and standards that address hydrogen technologies in general. (C) 2008 American Institute of Chemical Engineers Process Saf Prog 27: 328-335, 2008
C1 Hydrogen Technol & Syst Ctr, Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Rivkin, CH (reprint author), Hydrogen Technol & Syst Ctr, Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM carl_rivkin@yahoo.com
NR 2
TC 0
Z9 0
U1 0
U2 1
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 1066-8527
J9 PROCESS SAF PROG
JI Process Saf. Prog.
PD DEC
PY 2008
VL 27
IS 4
BP 328
EP 335
DI 10.1002/prs.10269
PG 8
WC Engineering, Chemical
SC Engineering
GA 374ZG
UT WOS:000261081600011
ER
PT J
AU Mason, J
Fthenakis, V
Zweibel, K
Hansen, T
Nikolakakis, T
AF Mason, James
Fthenakis, Vasilis
Zweibel, Ken
Hansen, Tom
Nikolakakis, Thomas
TI Coupling PV and CAES Power Plants to Transform Intermittent PV
Electricity into a Dispatchable Electricity Source
SO PROGRESS IN PHOTOVOLTAICS
LA English
DT Article
DE photovoltaics; CAES; solar energy
ID WIND ENERGY-SYSTEMS; STORAGE; EMISSIONS
AB This study investigates the transformation of photovoltaic (PV) electricity production from an intermittent into a dispatchable source of electricity by coupling PV plants to compressed air energy storage (CAES) gas turbine power plants. Based on historical solar irradiation data for the United States' south western states and actual PV and CAES performance data, we show that the large-scale adoption of coupled PV-CAES power plants will likely enable peak electricity generation in 2020 at costs equal to or lower than those from natural gas power plants with or without carbon capture and storage systems. Our findings also suggest that given the societal value of reducing carbon dioxide and the sensitivity of conventional generation to rising fossil fuel prices, this competitive crossover point may occur much sooner. Copyright (C) 2008 John Wiley & Sons, Ltd.
C1 [Mason, James] Renewable Energy Res Inst, Farmingdale, NY 11735 USA.
[Fthenakis, Vasilis] Columbia Univ, Ctr Life Cycle Anal, Upton, NY 11973 USA.
[Fthenakis, Vasilis] Brookhaven Natl Lab, PV EH&S Res Ctr, Upton, NY 11973 USA.
[Zweibel, Ken] George Washington Univ, Inst Anal Solar Energy, Washington, DC 20052 USA.
[Hansen, Tom] Tucson Elect Power, Tucson, AZ 85702 USA.
[Nikolakakis, Thomas] Columbia Univ, Ctr Life Cycle Anal, New York, NY 10027 USA.
RP Mason, J (reprint author), Renewable Energy Res Inst, 52 Columbia St, Farmingdale, NY 11735 USA.
EM je_mason@verizon.net
NR 39
TC 28
Z9 28
U1 0
U2 13
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 1062-7995
J9 PROG PHOTOVOLTAICS
JI Prog. Photovoltaics
PD DEC
PY 2008
VL 16
IS 8
BP 649
EP 668
DI 10.1002/pip.858
PG 20
WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied
SC Energy & Fuels; Materials Science; Physics
GA 385NB
UT WOS:000261819800001
ER
PT J
AU Lee, BC
Hoff, WD
AF Lee, Byoung-Chul
Hoff, Wouter D.
TI Proline 54 trans-cis isomerization is responsible for the kinetic
partitioning at the last-step photocycle of photoactive yellow protein
SO PROTEIN SCIENCE
LA English
DT Article
DE photoactive yellow protein; photocycle; protein folding; slow phase;
proline trans-cis isomerization; kinetic partitioning
ID TIM BARREL PROTEIN; PECTATE-LYASE-C; P-COUMARIC ACID; FOLDING KINETICS;
PROLYL ISOMERIZATION; ECTOTHIORHODOSPIRA-HALOPHILA; PHOTOTROPHIC
BACTERIUM; LANDSCAPE PERSPECTIVE; ANGSTROM RESOLUTION; RAPID FORMATION
AB Photoactive yellow protein (PYP), a blue-light photoreceptor for Ectothiorhodospira halophila, has provided a unique system for studying protein folding that is coupled with a photocycle. Upon receptor activation by blue light, PYP proceeds through a photocycle that includes a partially folded signaling state. The last-step photocycle is a thermal recovery reaction from the signaling state to the native state. Bi-exponential kinetics had been observed for the last-step photocycle; however, the slow phase of the bi-exponential kinetics has not been extensively studied. Here we analyzed both fast and slow phases of the last-step photocycle in PYP. From the analysis of the denaturant dependence of the fast and slow phases, we found that the last-step photocycle proceeds through parallel channels of the folding pathway. The burial of the solvent-accessible area was responsible for the transition state of the fast phase, while structural rearrangement from the compact state to the native state was responsible for the transition state of the slow phase. The photocycle of PYP was linked to the thermodynamic cycle that includes both unfolding and refolding of the fast- and slow-phase intermediates. In order to test the hypothesis of proline-limited folding for the slow phase, we constructed two proline mutants: P54A and P68A. We found that only a single phase of the last-step photocycle was observed in P54A. This suggests that there is a low energy barrier between trans to cis conformation in P54 in the light-induced state of PYP, and the resulting cis conformation of P54 generates a slow-phase kinetic trap during the photocycle-coupled folding pathway of PYP.
C1 [Lee, Byoung-Chul] Univ Calif Berkeley, Lawrence Berkeley Lab, Biol Nanostruct Facil, Berkeley, CA 94720 USA.
[Lee, Byoung-Chul; Hoff, Wouter D.] Oklahoma State Univ, Dept Microbiol & Mol Genet, Stillwater, OK 74078 USA.
RP Lee, BC (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Biol Nanostruct Facil, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM bclee@lbl.gov
FU U. S. Department of Energy [DE-AC02-05CH11231]; NIH [GM063805]; OCAST
[HR07-135S]
FX We thank Dr. Andrew Philip for constructing the two PYP proline mutants
P68A and P54A. We also thank Michael Connolly and Tammy Chu for the
critical reading of this manuscript. B.-C. L. is currently supported by
the Office of Science, Office of Basic Energy Sciences, of the U. S.
Department of Energy under Contract DE-AC02-05CH11231. W. D. H.
gratefully acknowledges support from NIH Grant GM063805 and OCAST Grant
HR07-135S.
NR 62
TC 6
Z9 6
U1 1
U2 10
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0961-8368
J9 PROTEIN SCI
JI Protein Sci.
PD DEC
PY 2008
VL 17
IS 12
BP 2101
EP 2110
DI 10.1110/ps.037655.108
PG 10
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 375ZA
UT WOS:000261151100008
PM 18794212
ER
PT J
AU Kelly, MA
Lowell, TV
Hall, BL
Schaefer, JM
Finkel, RC
Goehring, BM
Alley, RB
Denton, GH
AF Kelly, Meredith A.
Lowell, Thomas V.
Hall, Brenda L.
Schaefer, Joerg M.
Finkel, Robert C.
Goehring, Brent M.
Alley, Richard B.
Denton, George H.
TI A Be-10 chronology of lateglacial and Holocene mountain glaciation in
the Scoresby Sund region, east Greenland: implications for seasonality
during lateglacial time
SO QUATERNARY SCIENCE REVIEWS
LA English
DT Article
ID ABRUPT CLIMATE-CHANGE; SITU COSMOGENIC NUCLIDES; YOUNGER DRYAS;
ICE-SHEET; SNOW ACCUMULATION; OXYGEN-ISOTOPE; NORTH-ATLANTIC; ARCTIC
CANADA; BAFFIN-ISLAND; POLAR ICE
AB Thirty-eight new cosmogenic (Be-10) exposure ages from the Scoresby Sund region of east Greenland indicate that prominent moraine sets deposited by mountain glaciers date from 780 to 310 yr, approximately during the Little Ice Age, from 11660 to 10 630 yr, at the end of the Younger Dryas cold interval or during Preboreal time, and from 13 010 to 11630 yr, during lateglacial time. Equilibrium line altitudes (ELAs) interpreted from lateglacial to Early Holocene moraines indicate summertime cooling between similar to 3.9 and 6.6 degrees C relative to today's value, much less than the extreme Younger Dryas cooling registered by Greenland ice cores (mean-annual temperatures of similar to 15 degrees C colder than today's value). This apparent discrepancy between paleotemperature records supports the contention that Younger Dryas cooling was primarily a wintertime phenomenon. Be-10 ages of lateglacial and Holocene moraines show that mountain glaciers during the Little Ice Age were more extensive than at any other time since the Early Holocene Epoch. In addition, 10Be ages of lateglacial moraines show extensive reworking of boulders with cosmogenic nuclides inherited from prior periods of exposure, consistent with our geomorphic observations and cosmogenic-exposure dating studies in other Arctic regions. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Kelly, Meredith A.; Schaefer, Joerg M.] Lamont Doherty Earth Observ, Geochem Div, Palisades, NY 10964 USA.
[Lowell, Thomas V.] Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA.
[Hall, Brenda L.; Denton, George H.] Univ Maine, Dept Earth Sci, Orono, ME 04469 USA.
[Hall, Brenda L.; Denton, George H.] Univ Maine, Climate Change Inst, Orono, ME 04469 USA.
[Finkel, Robert C.] Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA.
[Finkel, Robert C.] Columbia Univ, Dept Earth & Environm Sci, New York, NY 10027 USA.
[Alley, Richard B.] Penn State Univ, Dept Geosci, University Pk, PA 16802 USA.
[Alley, Richard B.] Penn State Univ, Earth & Environm Syst Inst, University Pk, PA 16802 USA.
RP Kelly, MA (reprint author), Lamont Doherty Earth Observ, Geochem Div, Palisades, NY 10964 USA.
EM meredith@ldeo.columbia.edu
FU NSF [ANT-0527946, OPP-0531211, OPP-0424589]; U.S. Department of Energy
[DE-AC52-07NA27344]
FX This research was made possible by the generous contributions of the
Comer Science and Education Foundation, which provided a Postdoctoral
Fellowship for M. Kelly as well as funding and logistical support for
field work. This research also was supported by an NSF Polar
Postdoctoral Fellowship to M. Kelly (ANT-0527946). R. Finkel was
supported by the U.S. Department of Energy under contract number
DE-AC52-07NA27344. R. Alley acknowledges partial support from NSF grants
OPP-0531211 and OPP-0424589. We are grateful for the kind and helpful
assistance of the captain and crew on the Turmoil, including P. Walsh,
B. Walsh and P. Migro. T. Allen and various pilots with Air Greenland
provided safe transport to and from field sites. We are indebted to R.
Schwartz, manager of the Cosmogenic Nuclide Laboratory at L-DEO. We
thank E. Brook, M. Bentley and an anonymous reviewer for constructive
comments.
NR 75
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U1 5
U2 33
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0277-3791
J9 QUATERNARY SCI REV
JI Quat. Sci. Rev.
PD DEC
PY 2008
VL 27
IS 25-26
BP 2273
EP 2282
DI 10.1016/j.quascirev.2008.08.004
PG 10
WC Geography, Physical; Geosciences, Multidisciplinary
SC Physical Geography; Geology
GA 389XX
UT WOS:000262130000002
ER
PT J
AU Ban, S
Buchanan, M
Cheeks, N
Funsten, H
Hawsey, R
Lane, M
Whitlow, W
Studt, T
AF Ban, Stephen
Buchanan, Michelle
Cheeks, Nona
Funsten, Herbert
Hawsey, Robert
Lane, Monya
Whitlow, Woodrow, Jr.
Studt, Tim
TI Tough Times Ahead for Government Labs
SO R&D MAGAZINE
LA English
DT Editorial Material
C1 [Ban, Stephen] Argonne Natl Lab, Argonne, IL 60439 USA.
[Buchanan, Michelle] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Cheeks, Nona] NASA, Goddard Space Flight Ctr, Innovat Partnerships Program Off, Greenbelt, MD 20771 USA.
[Funsten, Herbert] Los Alamos Natl Lab, ISR Technol Div, Los Alamos, NM USA.
[Hawsey, Robert] Natl Renewable Energy Lab, Golden, CO USA.
[Lane, Monya] Lawrence Livermore Natl Lab, Livermore, CA USA.
[Whitlow, Woodrow, Jr.] NASA, Glenn Res Ctr, Cleveland, OH USA.
[Studt, Tim] Adv Business Media, Lab Equipment Magazine, Elk Grove Village, IL USA.
RP Ban, S (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Funsten, Herbert/A-5702-2015
OI Funsten, Herbert/0000-0002-6817-1039
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ADVANTAGE BUSINESS MEDIA
PI ROCKAWAY
PA 100 ENTERPRISE DR, SUITE 600, BOX 912, ROCKAWAY, NJ 07866-0912 USA
SN 0746-9179
J9 R&D MAG
JI R D Mag.
PD DEC
PY 2008
VL 50
IS 7
BP 10
EP 12
PG 3
WC Engineering, Industrial; Multidisciplinary Sciences
SC Engineering; Science & Technology - Other Topics
GA 386SS
UT WOS:000261903500002
ER
PT J
AU Groesser, T
Cooper, B
Rydberg, B
AF Groesser, Torsten
Cooper, Brian
Rydberg, Bjorn
TI Lack of Bystander Effects from High-LET Radiation for Early Cytogenetic
End Points
SO RADIATION RESEARCH
LA English
DT Article
ID INDUCED GENOMIC INSTABILITY; DOUBLE-STRAND BREAKS; MEDIATED
INTERCELLULAR COMMUNICATION; PRIMARY HUMAN FIBROBLASTS;
IONIZING-RADIATION; CHROMOSOMAL-ABERRATIONS; ALPHA-PARTICLES;
MAMMALIAN-CELLS; DAMAGE SIGNALS; CHO-CELLS
AB The aim of this work was to study radiation-induced bystander effects for early cytogenetic end points in various cell lines using the medium transfer technique after exposure to high- and low-LET radiation. Cells were exposed to 20 MeV/nucleon nitrogen ions, 968 MeV/nucleon iron ions, or 575 MeV/nucleon iron ions followed by transfer of the conditioned medium from the irradiated cells to unirradiated test cells. The effects studied included DNA double-strand break induction, gamma-H2AX focus formation, induction of chromatid breaks in prematurely condensed chromosomes, and micronucleus formation using DNA repair-proficient and -deficient hamster and human cell lines (xrs6, V79, SW48, MO59K and MO59J). Cell survival was also measured in SW48 bystander cells using X rays. Although it was occasionally possible to detect an increase in chromatid break levels using nitrogen ions and to see a higher number of gamma-H2AX foci using nitrogen and iron ions in xrs6 bystander cells in single experiments, the results were not reproducible. After we pooled all the data, we could not verify a significant bystander effect for any of these end points. Also, we did not detect a significant bystander effect for DSB induction or micronucleus formation in these cell lines or for clonogenic survival in SW48 cells. The data suggest that DNA damage and cytogenetic changes are not induced in bystander cells. In contrast, data in the literature show pronounced bystander effects in a variety of cell lines, including clonogenic survival in SW48 cells and induction of chromatid breaks and micronuclei in hamster cells. To reconcile these conflicting data, it is possible that the epigenetic status of the specific cell line or the precise culture conditions and medium supplements, such as serum, may be critical for inducing bystander effects. (C) 2008 by Radiation Research Society
C1 [Groesser, Torsten; Cooper, Brian; Rydberg, Bjorn] Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Genome Stabil, Div Life Sci, Berkeley, CA 94720 USA.
RP Groesser, T (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Genome Stabil, Div Life Sci, Bldg 74-157,1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM tgroesser@lbl.gov
OI Groesser, Torsten/0000-0003-3143-1906
FU NASA [T9493W]; Office of Science (BER), U.S. Department of Energy, Low
Dose Radiation Research Program [DE-AC02-05 CH 11231]
FX We thank Dr. Carmel Mothersill for testing our cells in her laboratory
and allowing us to quote the results as a personal communication. We
also thank Dr. Marcelo Vazquez, Dr. Betsy Sutherland and Dr. Adam Rusek
and their groups for support during the NSRL runs at Brookhaven National
Laboratory and Dr. Janice Pluth (LBNL) for her help with the flow
cytometry analysis as well as Julia Heymann (a summer Student at LBNL)
for her Support with the clonogenic survival experiments. The research
was funded by NASA Grant no. T9493W (awarded to Dr. Bjorn Rydberg) and
supported by the Office of Science (BER), U.S. Department of Energy, Low
Dose Radiation Research Program, through Contract No. DE-AC02-05 CH
11231.
NR 38
TC 38
Z9 39
U1 0
U2 7
PU RADIATION RESEARCH SOC
PI LAWRENCE
PA 810 E TENTH STREET, LAWRENCE, KS 66044 USA
SN 0033-7587
J9 RADIAT RES
JI Radiat. Res.
PD DEC
PY 2008
VL 170
IS 6
BP 794
EP 802
DI 10.1667/RR1458.1
PG 9
WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging
SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology,
Nuclear Medicine & Medical Imaging
GA 377WH
UT WOS:000261282100011
PM 19138042
ER
PT J
AU Kertesz, V
Van Berkel, GJ
AF Kertesz, Vilmos
Van Berkel, Gary J.
TI Improved desorption electrospray ionization mass spectrometry
performance using edge sampling and a rotational sample stage
SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY
LA English
DT Article
ID THIN-LAYER-CHROMATOGRAPHY; MECHANISMS
AB The position of the surface to be analyzed relative to the sampling orifice or capillary into the mass spectrometer has been known to dramatically affect the observed signal levels in desorption electrospray ionization mass spectrometry (DESI-MS). In analyses of sample spots on planar surfaces, DESI-MS signal intensities as much as five times greater were routinely observed when the bottom of the sampling capillary was appropriately positioned beneath the surface plane ('edge sampling') compared with when the capillary just touched the surface. To take advantage of the optimum 'edge sampling' geometry and to maximize the number of samples that could be analyzed in this configuration, a rotational sample stage was integrated into a typical DESI-MS setup. The rapid quantitative determination of caffeine in two diet sport drinks spiked with an isotopically labeled internal standard demonstrated the utility of this approach. Published in 2008 by John Wiley & Sons, Ltd.
C1 [Kertesz, Vilmos; Van Berkel, Gary J.] Oak Ridge Natl Lab, Organ & Biol Mass Spectrometry Grp, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Kertesz, V (reprint author), Oak Ridge Natl Lab, Organ & Biol Mass Spectrometry Grp, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM kerteszv@ornl.gov
RI Kertesz, Vilmos/M-8357-2016
OI Kertesz, Vilmos/0000-0003-0186-5797
FU ORNL through a Cooperative Research and Development Agreement [CRADA
ORNL02-0662]; Division of Chemical Sciences, Geosciences, and
Biosciences; Office of Basic Energy Sciences; United States Department
of Energy; ORNL Technology Transfer and Economic Development Royalty
Funds; UT-Battelle, LLC, for the United States Department of Energy
[DE-AC05-00OR22725]; U.S. Government [DE-AC05-00OR22725]
FX The particle discriminator interface as well as the microionspray 11
used to fabricate the DESI emitter were provided to ORNL through a
Cooperative Research and Development Agreement with MDS Sciex (CRADA
ORNL02-0662). Study of the enhancement of DESI signal on geometric
parameters was supported by the Division of Chemical Sciences,
Geosciences, and Biosciences, Office of Basic Energy Sciences, United
States Department of Energy. ORNL Technology Transfer and Economic
Development Royalty Funds provided support for the development
modification, and application of the surface scanning control and data
processing software. ORNL is managed and operated by UT-Battelle, LLC,
for the United States Department of Energy under Contract
DE-AC05-00OR22725. This manuscript has been authored by a contractor of
the U.S. Government under contract DE-AC05-00OR22725. Accordingly, the
U.S. Government retains a paid-up, nonexclusive, irrevocable, worldwide
license to publish or reproduce the published form of this contribution,
prepare derivative works, distribute copies to the public, and perform
publicly and display publicly, or allow others to do so, for U.S.
Government purposes.
NR 16
TC 18
Z9 18
U1 0
U2 11
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0951-4198
J9 RAPID COMMUN MASS SP
JI Rapid Commun. Mass Spectrom.
PD DEC
PY 2008
VL 22
IS 23
BP 3846
EP 3850
DI 10.1002/rcm.3812
PG 5
WC Chemistry, Analytical; Spectroscopy
SC Chemistry; Spectroscopy
GA 381AI
UT WOS:000261506800019
PM 19003852
ER
PT J
AU Dai, F
Xia, K
Luo, SN
AF Dai, F.
Xia, K.
Luo, S. N.
TI Semicircular bend testing with split Hopkinson pressure bar for
measuring dynamic tensile strength of brittle solids
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
DE bending strength; brittleness; failure (mechanical); finite element
analysis; fracture toughness; rocks; tensile strength; tensile testing
ID PULSE-SHAPING TECHNIQUES; ROCK MATERIALS; DIAMETRAL COMPRESSION; GRANITE
AB We propose and validate an indirect tensile testing method to measure the dynamic tensile strength of rocks and other brittle solids: semicircular bend (SCB) testing with a modified split Hopkinson pressure bar (SHPB) system. A strain gauge is mounted near the failure spot on the specimen to determine the rupture time. The momentum trap technique is utilized to ensure single pulse loading for postmortem examination. Tests without and with pulse shaping are conducted on rock specimens. The evolution of tensile stress at the failure spot is determined via dynamic and quasistatic finite element analyses with the dynamic loads measured from SHPB as inputs. Given properly shaped incident pulse, far-field dynamic force balance is achieved and the peak of the loading matches in time with the rupture onset of the specimen. In addition, the dynamic tensile stress history at the failure spot obtained from the full dynamic finite element analysis agrees with the quasistatic analysis. The opposite occurs for the test without pulse shaping. These results demonstrate that when the far-field dynamic force balance is satisfied, the inertial effects associated with stress wave loading are minimized and thus one can apply the simple quasistatic analysis to obtain the tensile strength in the SCB-SHPB testing. This method provides a useful and cost effective way to measure indirectly the dynamic tensile strength of rocks and other brittle materials.
C1 [Dai, F.; Xia, K.] Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, Canada.
[Dai, F.; Xia, K.] Univ Toronto, Lassonde Inst, Toronto, ON M5S 1A4, Canada.
[Luo, S. N.] Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA.
RP Xia, K (reprint author), Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, Canada.
EM kaiwen.xia@utoronto.ca
RI Luo, Sheng-Nian /D-2257-2010
OI Luo, Sheng-Nian /0000-0002-7538-0541
FU NSERC/Discovery [72031326]; U. S. Department of Energy [W-7405-ENG-36]
FX F. D. and K. X. acknowledge the support by NSERC/Discovery Grant No.
72031326. LANL is under the auspices of the U. S. Department of Energy
under Contract No. W-7405-ENG-36.
NR 14
TC 15
Z9 17
U1 4
U2 28
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0034-6748
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD DEC
PY 2008
VL 79
IS 12
AR 123903
DI 10.1063/1.3043420
PG 6
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 391HQ
UT WOS:000262224800037
PM 19123575
ER
PT J
AU Dickinson, B
Seidler, GT
Webb, ZW
Bradley, JA
Nagle, KP
Heald, SM
Gordon, RA
Chou, IM
AF Dickinson, B.
Seidler, G. T.
Webb, Z. W.
Bradley, J. A.
Nagle, K. P.
Heald, S. M.
Gordon, R. A.
Chou, I. M.
TI A short working distance multiple crystal x-ray spectrometer
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
DE dysprosium; manganese; manganese compounds; XANES; X-ray emission
spectra; X-ray fluorescence analysis; X-ray spectrometers
ID ABSORPTION SPECTROSCOPY; DIFFRACTORS; EMISSION; SPECTRA; ANALYZER;
OPTICS; METAL
AB For x-ray spot sizes of a few tens of microns or smaller, a millimeter-sized flat analyzer crystal placed similar to 1 cm from the sample will exhibit high energy resolution while subtending a collection solid angle comparable to that of a typical spherically bent crystal analyzer (SBCA) at much larger working distances. Based on this observation and a nonfocusing geometry for the analyzer optic, we have constructed and tested a short working distance (SWD) multicrystal x-ray spectrometer. This prototype instrument has a maximum effective collection solid angle of 0.14 sr, comparable to that of 17 SBCA at 1 m working distance. We find good agreement with prior work for measurements of the Mn K beta x-ray emission and resonant inelastic x-ray scattering for MnO, and also for measurements of the x-ray absorption near-edge structure for Dy metal using L alpha(2) partial-fluorescence yield detection. We discuss future applications at third- and fourth-generation light sources. For concentrated samples, the extremely large collection angle of SWD spectrometers will permit collection of high-resolution x-ray emission spectra with a single pulse of the Linac Coherent Light Source. The range of applications of SWD spectrometers and traditional multi-SBCA instruments has some overlap, but also is significantly complementary.
C1 [Dickinson, B.; Seidler, G. T.; Webb, Z. W.; Bradley, J. A.; Nagle, K. P.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
[Heald, S. M.] Argonne Natl Labs, Adv Photon Source, Argonne, IL 60439 USA.
[Gordon, R. A.] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada.
[Chou, I. M.] US Geol Survey, Reston, VA 20192 USA.
RP Seidler, GT (reprint author), Univ Washington, Dept Phys, Seattle, WA 98195 USA.
EM seidler@phys.washington.edu
RI Seidler, Gerald/I-6974-2012
FU Office of Naval Research [N00014-05-1-0843]; L. X. Bosack and B. M.
Kruger Charitable Foundation; U. S. Department of Energy, Basic Energy
Science, Office of Science [DE-AC02-06CH11357]; Natural Sciences and
Engineering Research Council of Canada; U. S. Department of Energy,
Basic Energy Sciences, Office of Science [DE-AC02-06CH11357]
FX We thank D. Crozier, D. Fritz, A. Macrander, B. Ravel, L. Sorensen, and
E. Stern for useful discussions. This research was supported by the
Office of Naval Research Grant No. N00014-05-1-0843 and the L. X. Bosack
and B. M. Kruger Charitable Foundation. The operation of Sector 20
PNC-CAT/XOR is supported by the U. S. Department of Energy, Basic Energy
Science, Office of Science (Contract No. DE-AC02-06CH11357) and grants
from the Natural Sciences and Engineering Research Council of Canada.
Use of the Advanced Photon Source was supported by the U. S. Department
of Energy, Basic Energy Sciences, Office of Science, under Contract No.
DE-AC02-06CH11357.
NR 41
TC 18
Z9 18
U1 3
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 0034-6748
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD DEC
PY 2008
VL 79
IS 12
AR 123112
DI 10.1063/1.3048544
PG 8
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 391HQ
UT WOS:000262224800012
PM 19123550
ER
PT J
AU Meyer, KA
Ovchinnikova, O
Ng, K
Goeringer, DE
AF Meyer, Kent A.
Ovchinnikova, Olga
Ng, Kin
Goeringer, Douglas E.
TI Development of a scanning surface probe for nanoscale tip-enhanced
desorption/ablation
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
DE desorption; laser ablation; probes; scanning probe microscopy
ID OPTICAL MICROSCOPY; RAMAN-SPECTROSCOPY; MASS SPECTROMETRY;
NANOMETER-SCALE; FIELD; ABLATION; MICROPROBE
AB We report on the development of a versatile scanning apparatus for nanoscale surface sampling that utilizes the interaction of laser radiation at a sharp probe tip to effect desorption/ablation on opaque substrates. The process, which currently yields surface craters as small as similar to 50 nm diameterx5 nm deep, has been demonstrated with both metal-coated and bare silicon tips. Desorption/ablation under the tip occurs at illumination intensities below the corresponding optical far-field threshold, suggesting that the latter process should not degrade the spatial resolution attainable for proposed chemical imaging methods based on the scanning surface probe.
C1 [Meyer, Kent A.; Ovchinnikova, Olga; Goeringer, Douglas E.] Oak Ridge Natl Lab, Div Chem Sci, Organ & Biol Mass Spectrometry Grp, Oak Ridge, TN 37831 USA.
[Ng, Kin] Calif State Univ Fresno, Dept Chem, Fresno, CA 93740 USA.
RP Goeringer, DE (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Organ & Biol Mass Spectrometry Grp, Oak Ridge, TN 37831 USA.
EM goeringerde@ornl.gov
FU Laboratory Directed Research and Development Program of Oak Ridge
National Laboratory
FX We thank S. Jesse and S. V. Kalinin for instrument loans and their
helpful suggestions in regard to selection of key pieces of equipment
for the project. W. B. Whitten and R. W. Shaw are acknowledged for
valuable discussions in connection with experiments. G. J. Van Berkel is
recognized for his continued support and encouragement during the course
of the project. Research sponsored by the Laboratory Directed Research
and Development Program of Oak Ridge National Laboratory, managed by
UT-Battelle, LLC, for the U. S. Department of Energy.
NR 19
TC 12
Z9 12
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 0034-6748
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD DEC
PY 2008
VL 79
IS 12
AR 123710
DI 10.1063/1.3053200
PG 4
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 391HQ
UT WOS:000262224800034
PM 19123572
ER
PT J
AU Pikin, A
Kponou, A
AF Pikin, Alexander
Kponou, Ahovi
TI Correction of spherical aberration for an electrostatic gridded lens
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
DE aberrations; electrostatic lenses; ion beams; ray tracing
ID MESHES
AB Two methods to correct spherical aberration in electrostatic gridded lenses have been studied using ray-tracing simulations. Both methods are based on modifying the electrostatic field on the radial periphery of the lens. In the simplest case, the modification is done by extending the grid support axially. In the second method, the electric field on a radial periphery of the lens is modified by applying optimum voltage on an isolated correcting electrode. It is demonstrated that, for a given focal length, the voltage on this lens can be optimized for minimum aberration, and also that these lenses reduce the emittance growth of the ion beam.
C1 [Pikin, Alexander; Kponou, Ahovi] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Pikin, A (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
NR 4
TC 1
Z9 1
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 0034-6748
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD DEC
PY 2008
VL 79
IS 12
AR 123303
DI 10.1063/1.3030857
PG 4
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 391HQ
UT WOS:000262224800020
PM 19123558
ER
PT J
AU Smith, DR
Mazzucato, E
Lee, W
Park, HK
Domier, CW
Luhmann, NC
AF Smith, D. R.
Mazzucato, E.
Lee, W.
Park, H. K.
Domier, C. W.
Luhmann, N. C., Jr.
TI A collective scattering system for measuring electron gyroscale
fluctuations on the National Spherical Torus Experiment
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
DE plasma fluctuations; plasma toroidal confinement; plasma turbulence;
Tokamak devices
ID DENSITY-FLUCTUATIONS; EXPERIMENT NSTX; TURBULENCE; TRANSPORT;
CONFINEMENT; TOKAMAKS; PHYSICS; PLASMAS; WAVES
AB A collective scattering system has been installed on the National Spherical Torus Experiment (NSTX) to measure electron gyroscale fluctuations in NSTX plasmas. The system measures fluctuations with k(perpendicular to)rho(e)less than or similar to 0.6 and k(perpendicular to)less than or similar to 20 cm(-1). Up to five distinct wavenumbers are measured simultaneously, and the large toroidal curvature of NSTX plasmas provides enhanced spatial localization. Steerable optics can position the scattering volume throughout the plasma from the magnetic axis to the outboard edge. Initial measurements indicate rich turbulent dynamics on the electron gyroscale. The system will be a valuable tool for investigating the connection between electron temperature gradient turbulence and electron thermal transport in NSTX plasmas.
C1 [Smith, D. R.; Mazzucato, E.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Lee, W.; Park, H. K.] POSTECH, Dept Phys, Pohang 790784, South Korea.
[Domier, C. W.; Luhmann, N. C., Jr.] Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA.
RP Smith, DR (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM drsmith@pppl.gov
FU U. S. Department of Energy [DE-AC02-76CH03073, DE-FG03-95ER54295,
DE-FG03-99ER54518]
FX This work was supported by the U. S. Department of Energy under Contract
Nos. DE-AC02-76CH03073, DE-FG03-95ER54295, and DE-FG03-99ER54518.
NR 26
TC 34
Z9 34
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 0034-6748
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD DEC
PY 2008
VL 79
IS 12
AR 123501
DI 10.1063/1.3039415
PG 6
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 391HQ
UT WOS:000262224800023
PM 19123561
ER
PT J
AU Ekimov, EA
Sidorov, VA
Zoteev, AV
Lebed, JB
Thompson, JD
Stishov, SM
AF Ekimov, Evgeny A.
Sidorov, Vladimir A.
Zoteev, Andrey V.
Lebed, Julia B.
Thompson, Joe D.
Stishov, Sergey M.
TI Structure and superconductivity of isotope-enriched boron-doped diamond
SO SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
LA English
DT Article; Proceedings Paper
CT 2nd International Workshop on Superconductivity in Diamond and Related
Materials
CY JUL, 2008
CL Natl Inst Mat Sci, Tsukuba, JAPAN
HO Natl Inst Mat Sci
DE boron-doped diamond; superconductivity; Raman spectroscopy; isotope
effect
ID POLYCRYSTALLINE DIAMOND; ELECTRICAL-CONDUCTIVITY; RAMAN-SPECTROSCOPY;
FILMS; TEMPERATURE; GRAPHITE
AB Superconducting boron-doped diamond samples were synthesized with isotopes of B-10, B-11, C-13 and C-12. We claim the presence of a carbon isotope effect on the superconducting transition temperature, which supports the 'diamond-carbon'-related nature of superconductivity and the importance of the electron-phonon interaction as the mechanism of superconductivity in diamond. Isotope substitution permits us to relate almost all bands in the Raman spectra of heavily boron-doped diamond to the vibrations of carbon atoms. The 500 cm(-1) Raman band shifts with either carbon or boron isotope substitution and may be associated with vibrations of paired or clustered boron. The absence of a superconducting transition (down to 1.6 K) in diamonds synthesized in the Co-C-B system at 1900 K correlates with the small boron concentration deduced from lattice parameters.
C1 [Ekimov, Evgeny A.; Sidorov, Vladimir A.; Stishov, Sergey M.] Russian Acad Sci, Inst High Pressure Phys, Troitsk 142190, Russia.
[Zoteev, Andrey V.] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119992, Russia.
[Lebed, Julia B.] Russian Acad Sci, Inst Nucl Res, Troitsk 142190, Russia.
[Thompson, Joe D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Ekimov, EA (reprint author), Russian Acad Sci, Inst High Pressure Phys, Troitsk 142190, Russia.
EM ekimov@hppi.troitsk.ru
NR 24
TC 18
Z9 18
U1 2
U2 12
PU NATL INST MATERIALS SCIENCE
PI IBARAKI
PA NATL INST MATERIALS SCIENCE, 1-2-1 SENGEN, TSUKUBA-CITY, IBARAKI,
305-0047, JAPAN
SN 1468-6996
J9 SCI TECHNOL ADV MAT
JI Sci. Technol. Adv. Mater.
PD DEC
PY 2008
VL 9
IS 4
AR 044210
DI 10.1088/1468-6996/9/4/044210
PG 6
WC Materials Science, Multidisciplinary
SC Materials Science
GA 450VA
UT WOS:000266428000016
PM 27878027
ER
PT J
AU Pokethitiyook, P
Tangaromsuk, J
Kruatrachue, M
Kalambaheti, C
Borole, AP
AF Pokethitiyook, Prayad
Tangaromsuk, Jantana
Kruatrachue, Maleeya
Kalambaheti, Chatvalee
Borole, Abhijeet P.
TI Biological removal of organic sulphur by bacterial strains isolated in
Thailand
SO SCIENCEASIA
LA English
DT Article
DE dibenzothiophene; organosulphur compounds; bioremediation
ID DIBENZOTHIOPHENE DESULFURIZATION; DEGRADATION; RHODOCOCCUS;
BIODESULFURIZATION; PSEUDOMONAS; IGTS8; ERYTHROPOLIS; BIOTRANSFORMATION;
BIODEGRADATION; BENZOTHIOPHENE
AB Three bacterial strains isolated in Thailand, Bacillus circulans MS2, Rhodococcus gordoniae R3, and Rhizobium sp. MS4, were investigated for their potential to remove organosulphur compounds. These strains were shown to be very effective at removing dibenzothiophene, which was not metabolized via a sulphur-specific pathway, as revealed by Gibb's assay. The substrate specificity of each strain was investigated by studying the growth and the ability to remove the growing and resting cells on various substrates. R3 had a broader range of substrate specificity than MS2 and MS4, making it a good strain for bioremediation of oil-contaminated environments.
C1 [Pokethitiyook, Prayad; Tangaromsuk, Jantana; Kruatrachue, Maleeya] Mahidol Univ, Fac Sci, Dept Biol, Bangkok 10400, Thailand.
[Kalambaheti, Chatvalee] PTT Res & Technol Inst, Ayudthaya 13170, Thailand.
[Borole, Abhijeet P.] Oak Ridge Natl Lab, Biosci Div, Oak Ridge, TN 37831 USA.
RP Pokethitiyook, P (reprint author), Mahidol Univ, Fac Sci, Dept Biol, Bangkok 10400, Thailand.
EM scppg@mahidol.ac.th
RI Borole, AP/F-3933-2011; Unciano, Noel/B-6810-2009;
OI Pokethitiyook, Prayad/0000-0002-9017-2900; Borole,
Abhijeet/0000-0001-8423-811X
FU Mahidol University; Thailand Research Fund Royal Golden Jubilee;
Ministry of Education
FX This research work was supported by a research grant from Mahidol
University. Jantana Tangaromsuk was supported by the Thailand Research
Fund Royal Golden Jubilee Ph.D. Programme. We also acknowledge the
Centre on Environmental Health, Toxicology and Management of Toxic
Chemicals under Science & Technology Postgraduate Education and Research
Development Office of the Ministry of Education for partial financial
support.
NR 38
TC 2
Z9 2
U1 1
U2 6
PU THAILANDS NATL SCIENCE & TECHNOLOGY DEVELOPMENT AGENCY
PI BANGKOK
PA PUBLIC INFORMATION DEPT, 73/1 RAMA VI RD, RAJDHEVEE, BANGKOK, 00000,
THAILAND
SN 1513-1874
J9 SCIENCEASIA
JI Scienceasia
PD DEC
PY 2008
VL 34
IS 4
BP 361
EP 366
DI 10.2306/scienceasia1513-1874.2008.34.361
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 397VF
UT WOS:000262689500003
ER
PT J
AU Soderlind, P
Moore, KT
AF Soderlind, Per
Moore, Kevin T.
TI When magnetism can stabilize the crystal structure of metals
SO SCRIPTA MATERIALIA
LA English
DT Article
DE Magnetism; Periodic table; Elements; Crystal
ID PLUTONIUM; RULE
AB The crystal structure of some metals is caused by magnetism, meaning spin polarization dictates atomic geometry. We show that the determining factors for magnetic stabilization of metallic crystal structures is the proximity of the border between superconducting and magnetic valence electron behavior and the energy difference between competing crystals. Recently, a high-pressure monoclinic Cm phase was found, which is stabilized by magnetism. We put these results into a broader context, showing how magnetic stabilization of metals occurs throughout the periodic table. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Soderlind, Per; Moore, Kevin T.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Soderlind, P (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA.
EM soderlind@llnl.gov
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.
NR 23
TC 8
Z9 8
U1 1
U2 5
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6462
J9 SCRIPTA MATER
JI Scr. Mater.
PD DEC
PY 2008
VL 59
IS 12
BP 1259
EP 1262
DI 10.1016/j.scriptamat.2008.08.031
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 373XS
UT WOS:000261007400008
ER
PT J
AU Bringa, EM
Farkas, D
Caro, A
Wang, YM
McNaney, J
Smith, R
AF Bringa, E. M.
Farkas, Diana
Caro, A.
Wang, Y. M.
McNaney, J.
Smith, R.
TI Fivefold twin formation during annealing of nanocrystalline Cu
SO SCRIPTA MATERIALIA
LA English
DT Article
DE Molecular dynamics; Nanocrystalline materials; Twinning
ID STACKING-FAULT ENERGIES; DEFORMATION-MECHANISM; NI; METALS; COPPER;
STRENGTH; ALLOYS; NICKEL; SLIP; AL
AB Contrary to the common belief that many-fold twins in nanophase materials are due to the action of significant external stresses, we report molecular dynamics simulations of 5 nm grain size Cu samples annealed at 800 K showing the formation of fivefold twins with no external pressure. The structure of the many-fold twins is remarkably similar to those we have found to occur under uniaxial shock loading in nanocrystalline NiW. The formation mechanism of the many-fold twins is discussed. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Farkas, Diana] Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA.
[Bringa, E. M.; Caro, A.; Wang, Y. M.; McNaney, J.; Smith, R.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Farkas, D (reprint author), Virginia Tech, Dept Mat Sci & Engn, 201-A Holden Hall 0237, Blacksburg, VA 24061 USA.
EM diana@vt.edu
RI Bringa, Eduardo/F-8918-2011; McNaney, James/F-5258-2013; Wang, Yinmin
(Morris)/F-2249-2010
OI Wang, Yinmin (Morris)/0000-0002-7161-2034
FU US Department of Energy [DE-AC52-07NA27344]; ASC-DOM program; Laboratory
Directed Research and Development program
FX We thank C.A. Schuh and A.J. Detor for providing the nc NiW samples, and
M. Victoria, M. Meyers and H. Jarmakani for useful discussions. The work
at LLNL was performed under the auspices of the US Department of Energy
and Lawrence Livermore National Laboratory under Contract
DE-AC52-07NA27344, with support from the ASC-DOM program and the
Laboratory Directed Research and Development program.
NR 24
TC 27
Z9 27
U1 3
U2 23
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6462
J9 SCRIPTA MATER
JI Scr. Mater.
PD DEC
PY 2008
VL 59
IS 12
BP 1267
EP 1270
DI 10.1016/j.scriptamat.2008.08.041
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 373XS
UT WOS:000261007400010
ER
PT J
AU Yilmaz, N
Gill, W
Donaldson, AB
Lucero, RE
AF Yilmaz, Nadir
Gill, Walt
Donaldson, A. Burl
Lucero, Ralph E.
TI Problems Encountered in Fluctuating Flame Temperature Measurements by
Thermocouple
SO SENSORS
LA English
DT Article
DE Fluctuating flames; Diffusion flames; Flame thermocouple measurement;
Thermocouple transfer function
ID DIFFUSION FLAMES
AB Some thermocouple experiments were carried out in order to obtain sensitivity of thermocouple readings to fluctuations in flames and to determine if the average thermocouple reading was representative of the local volume temperature for fluctuating flames. The thermocouples considered were an exposed junction thermocouple and a fully sheathed thermocouple with comparable time constants. Either the voltage signal or indicated temperature for each test was recorded at sampling rates between 300-4,096 Hz. The trace was then plotted with respect to time or sample number so that time variation in voltage or temperature could be visualized and the average indicated temperature could be determined. For experiments where high sampling rates were used, the signal was analyzed using Fast Fourier Transforms (FFT) to determine the frequencies present in the thermocouple signal. This provided a basic observable as to whether or not the probe was able to follow flame oscillations. To enhance oscillations, for some experiments, the flame was forced. An analysis based on thermocouple time constant, coupled with the transfer function for a sinusoidal input was tested against the experimental results.
C1 [Yilmaz, Nadir] New Mexico Inst Min & Technol, Dept Mech Engn, Socorro, NM 87801 USA.
[Gill, Walt; Donaldson, A. Burl] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Lucero, Ralph E.] New Mexico State Univ, Dept Mech Engn, Las Cruces, NM 88003 USA.
RP Yilmaz, N (reprint author), New Mexico Inst Min & Technol, Dept Mech Engn, Socorro, NM 87801 USA.
EM yilmaznadir@yahoo.com; wgill@sandia.gov; bdonald@sandia.gov;
rallucer@nmsu.edu
FU Sandia National Laboratories [380387]
FX This work was supported by Sandia National Laboratories under Purchase
Order 380387.
NR 10
TC 12
Z9 12
U1 0
U2 5
PU MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL-MDPI
PI BASEL
PA KANDERERSTRASSE 25, CH-4057 BASEL, SWITZERLAND
SN 1424-8220
J9 SENSORS-BASEL
JI Sensors
PD DEC
PY 2008
VL 8
IS 12
BP 7882
EP 7893
DI 10.3390/s8127882
PG 12
WC Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation
SC Chemistry; Electrochemistry; Instruments & Instrumentation
GA 387JJ
UT WOS:000261948200020
PM 27873964
ER
PT J
AU Nobile, C
Ashby, PD
Schuck, PJ
Fiore, A
Mastria, R
Cingolani, R
Manna, L
Krahne, R
AF Nobile, Concetta
Ashby, Paul D.
Schuck, P. James
Fiore, Angela
Mastria, Rosanna
Cingolani, Roberto
Manna, Liberato
Krahne, Roman
TI Probe Tips Functionalized with Colloidal Nanocrystal Tetrapods for
High-Resolution Atomic Force Microscopy Imaging
SO SMALL
LA English
DT Article
DE atomic force microscopy; functionalized tips; nanocrystals; tetrapods
ID NANOTUBE SCANNING PROBE; AFM PROBES; CARBON; FABRICATION; NANOPARTICLES;
GROWTH; BEAM
C1 [Nobile, Concetta; Fiore, Angela; Mastria, Rosanna; Cingolani, Roberto; Manna, Liberato; Krahne, Roman] CNR, INFM, Natl Nanotechnol Lab, Distretto Technol ISUFI, I-73100 Lecce, Italy.
[Ashby, Paul D.; Schuck, P. James] Univ Calif Berkeley, Lawrence Berkeley Lab, Imaging Facil Mol Foundry, Berkeley, CA 94720 USA.
RP Krahne, R (reprint author), CNR, INFM, Natl Nanotechnol Lab, Distretto Technol ISUFI, Via Arnesano, I-73100 Lecce, Italy.
EM roman.krahne@unile.it
RI Cingolani, Roberto/B-9191-2011; Manna, Liberato/G-2339-2010;
OI Manna, Liberato/0000-0003-4386-7985; MASTRIA,
ROSANNA/0000-0002-1710-9390; Krahne, Roman/0000-0003-0066-7019
FU SA-NANO European [STRP013698]; FIRB protocol [RBIN048TSE]; Office of
Science; US Department of Energy [DE-AC0205CH11231]
FX The authors thank Benedetta Antonazzo for technical assistance in the
Nanochemistry Laboratory. The work was supported by the SA-NANO European
project (Contract No. STRP013698), the bilateral agreement with Berkeley
(FIRB protocol RBIN048TSE) and work performed at the Molecular Foundry
are supported by the Office of Science, Office of Basic Energy Sciences
of the US Department of Energy under contract No, DE-AC0205CH11231.
NR 23
TC 16
Z9 16
U1 1
U2 7
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 1613-6810
EI 1613-6829
J9 SMALL
JI Small
PD DEC
PY 2008
VL 4
IS 12
BP 2123
EP 2126
DI 10.1002/smll.200800604
PG 4
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 386TI
UT WOS:000261905100006
PM 18985671
ER
PT J
AU Taheri, ML
Reed, BW
LaGrange, TB
Browning, ND
AF Taheri, Mitra L.
Reed, Bryan W.
LaGrange, Thomas B.
Browning, Nigel D.
TI In Situ Laser Synthesis of Si Nanowires in the Dynamic TEM
SO SMALL
LA English
DT Article
DE TEM; nanowires; lasers; ablation
ID LIQUID-SOLID GROWTH; SEMICONDUCTOR NANOWIRES; SILICON NANOWIRES; GAN
NANOWIRES; VAPOR; MECHANISM
C1 [Taheri, Mitra L.; Reed, Bryan W.; LaGrange, Thomas B.; Browning, Nigel D.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Taheri, ML (reprint author), Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA.
EM mtaheri@coe.drexel.edu
RI Taheri, Mitra/F-1321-2011; Reed, Bryan/C-6442-2013;
OI Browning, Nigel/0000-0003-0491-251X
FU Office of Science; Office of Basic Energy Sciences; Division of
Materials Sciences and Engineering; U.S. Department of Energy
[DE-AC52-07NA27344, DE-AC02-05CH11231]; National Center for Electron
Microscopy; Lawrence Berkeley Lab
FX This work performed under the auspices of the U.S. Department of Energy
by Lawrence Livermore National Laboratory and supported by the Office of
Science, Office of Basic Energy Sciences, Division of Materials Sciences
and Engineering, of the U.S. Department of Energy under Contract
DE-AC52-07NA27344. The authors acknowledge support of the National
Center for Electron Microscopy, Lawrence Berkeley Lab, which is
supported by the U.S. Department of Energy under Contract #
DE-AC02-05CH11231. The authors thank Blake Simpkins of the Naval
Research Laboratory for providing the Si/Au samples, Rick Gross for
assistance in sample preparation, and Richard Shuttlesworth and Benjamin
Pyke for technical support on the Dynamic TEM. M.T. thanks Alfredo
Morales of Sandia National Laboratory and Peidong Yang of UC Berkeley
for useful discussions with respect to nanowire growth.
NR 22
TC 9
Z9 9
U1 2
U2 23
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1613-6810
J9 SMALL
JI Small
PD DEC
PY 2008
VL 4
IS 12
BP 2187
EP 2190
DI 10.1002/smll.200800588
PG 4
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 386TI
UT WOS:000261905100020
PM 19003826
ER
PT J
AU Overly, TGS
Park, G
Farinholt, KM
Farrar, CR
AF Overly, Timothy G. S.
Park, Gyuhae
Farinholt, Kevin M.
Farrar, Charles R.
TI Development of an extremely compact impedance-based wireless sensing
device
SO SMART MATERIALS & STRUCTURES
LA English
DT Article
ID ACTIVE-SENSORS
AB This paper describes the development of the next generation of an extremely compact, wireless impedance sensor node for use in structural health monitoring (SHM) and piezoelectric active-sensor self-diagnostics. The sensor node uses a recently developed, low-cost integrated circuit that can measure and record the electrical impedance of a piezoelectric transducer. The sensor node also integrates several components, including a microcontroller for local computing, telemetry for wirelessly transmitting data, multiplexers for managing up to seven piezoelectric transducers per node, energy harvesting and storage mediums, and a wireless triggering circuit into one package to truly realize a comprehensive, self-contained wireless active-sensor node for various SHM applications. It is estimated that the developed sensor node requires less than 60 mW of total power for measurement, computation, and transmission. In addition, the sensor node is equipped with active-sensor self-diagnostic capabilities that can monitor the condition of piezoelectric transducers used in SHM applications. The performance of this miniaturized device is compared to our previous results and its broader capabilities are demonstrated.
C1 [Overly, Timothy G. S.; Park, Gyuhae; Farinholt, Kevin M.; Farrar, Charles R.] Los Alamos Natl Lab, Engn Inst, Los Alamos, NM 87545 USA.
RP Park, G (reprint author), Los Alamos Natl Lab, Engn Inst, Los Alamos, NM 87545 USA.
EM gpark@lanl.gov
RI Farrar, Charles/C-6954-2012;
OI Farrar, Charles/0000-0001-6533-6996
NR 15
TC 46
Z9 46
U1 0
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0964-1726
J9 SMART MATER STRUCT
JI Smart Mater. Struct.
PD DEC
PY 2008
VL 17
IS 6
AR 065011
DI 10.1088/0964-1726/17/6/065011
PG 9
WC Instruments & Instrumentation; Materials Science, Multidisciplinary
SC Instruments & Instrumentation; Materials Science
GA 376LZ
UT WOS:000261186400011
ER
PT J
AU An, JM
Subedi, A
Singh, DJ
AF An, Jiming
Subedi, Alaska
Singh, D. J.
TI Ab initio phonon dispersions for PbTe
SO SOLID STATE COMMUNICATIONS
LA English
DT Article
DE PbTe; Phonons
ID STRUCTURAL PHASE-TRANSITION; THERMOELECTRIC-MATERIALS;
TEMPERATURE-DEPENDENCE; SEMICONDUCTORS; GETE; PBSE
AB We report first principles calculations of the phonon dispersions of PbTe both for its observed structure and under compression. At the experimental lattice parameter we find a near instability of the optic branch at the zone center, in accord with experimental observations. This hardens quickly towards the zone boundary. There is also a very strong volume dependence of this mode, which is rapidly driven away from an instability by compression. These results are discussed in relation to the thermal conductivity of the material. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [An, Jiming; Subedi, Alaska; Singh, D. J.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[An, Jiming] Wuhan Univ Technol, Wuhan 430070, Peoples R China.
[Subedi, Alaska] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RP Singh, DJ (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
EM singhdj@ornl.gov
RI Singh, David/I-2416-2012
FU Department of Energy, EERE, Propulsion Materials Program; ORNL LDRD
Program; Office of Naval Research
FX We are grateful for helpful discussions with Jihui Yang (General Motors)
and M.H. Du. This work was supported by the Department of Energy, EERE,
Propulsion Materials Program and the ORNL LDRD Program and by the Office
of Naval Research (UT).
NR 30
TC 56
Z9 56
U1 1
U2 46
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0038-1098
EI 1879-2766
J9 SOLID STATE COMMUN
JI Solid State Commun.
PD DEC
PY 2008
VL 148
IS 9-10
BP 417
EP 419
DI 10.1016/j.ssc.2008.09.027
PG 3
WC Physics, Condensed Matter
SC Physics
GA 379OL
UT WOS:000261406000015
ER
PT J
AU Cetinkol, M
Wilkinson, AP
Chapman, KW
AF Cetinkol, Mehmet
Wilkinson, Angus P.
Chapman, Karena W.
TI Scandium tungstate above 2.5 GPa
SO SOLID STATE COMMUNICATIONS
LA English
DT Article
DE D. Phase transitions; D. Thermal expansion; E. Synchrotron radiation; E.
High pressure
ID NEGATIVE THERMAL-EXPANSION; PRESSURE-INDUCED AMORPHIZATION; RAY-POWDER
DIFFRACTION; PHASE-TRANSITIONS; ZIRCONIUM TUNGSTATE; CUBIC ZRMO2O8;
IN-SITU; TRANSFORMATIONS; COMPOSITES; COMPRESSIBILITY
AB Synchrotron x-ray powder diffraction was used to study SC(2)W(3)O(12) in a diamond anvil cell up to 6.2 GPa in order to better characterize the second high pressure phase observed in earlier in-situ diffraction Studies. Two crystalline-to-crystalline phase transitions were observed, in line with the earlier work. Above 2.7 GPa, Sc(2)W(3)O(12) adopted a monoclinic structure with probable space group P2(1)/n, that is distinct from the monoclinic phase existing between 0.3 GPa and 2.7 GPa. The bulk modulous (K(o)) for this second high pressure phase was estimated to be 90(3) GPa using a Birch-Murnaghan equation of state with K(p) Fixed at 4. Refining K(p) resulted in K(o) = 72(3) GPa and K(p) = 12(1). The transition at similar to 2.7 GPa on compression involved a unit cell volume reduction of almost 18% and was not reversible on decompression to atmospheric pressure at ambient temperature, suggesting that changes in bonding occur at the phase transition. Linear compressibility values for this high pressure monoclinic phase were estimated to be beta(a) = 3.6(1) X 10(-3) G Pa(-1), beta(b) = 3.7 (2) X 10(-3) GPa-1, beta(c) 2.0(1) X 10(-3) Gpa(-1) by straight line fits to the lattice constants over the range 0-6.2 GPa. (c) 2008 Elsevier Ltd. All rights reserved.
C1 [Cetinkol, Mehmet; Wilkinson, Angus P.] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA.
[Chapman, Karena W.] Argonne Natl Lab, Adv Photon Source, XSD, Argonne, IL 60439 USA.
RP Wilkinson, AP (reprint author), Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA.
EM angus.wilkinson@chemistry.gatech.edu
RI Wilkinson, Angus/C-3408-2008; Chapman, Karena/G-5424-2012
OI Wilkinson, Angus/0000-0003-2904-400X;
FU National Science Foundation [DMR-0203342, DIVIR-0605671, EAR-0622171];
GeoSoilEnviroCARS; Argonne National Laboratory; Department of
Energy-Geosciences [DE-FG02-94ER14466]; US Department of Energy
[DE-AC02-06CH 11357]
FX APW is grateful for support under National Science Foundation Grants
DMR-0203342 and DIVIR-0605671. Part of this work was performed using
facilities at GeoSoilEnviroCARS (Sector 13), Advanced Photon Source
(APS), Argonne National Laboratory. GeoSoilEnviroCARS is supported by
the National Science Foundation-Earth Sciences (EAR-0622171) and
Department of Energy-Geosciences (DE-FG02-94ER14466). 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-AC02-06CH 11357. We are grateful to Peter Lee for assistance with the
x-ray measurements.
NR 41
TC 6
Z9 9
U1 0
U2 6
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0038-1098
J9 SOLID STATE COMMUN
JI Solid State Commun.
PD DEC
PY 2008
VL 148
IS 11-12
BP 511
EP 515
DI 10.1016/j.ssc.2008.10.002
PG 5
WC Physics, Condensed Matter
SC Physics
GA 382EJ
UT WOS:000261587600007
ER
PT J
AU Birkle, P
Pruess, K
Xu, T
Figueroa, RAH
Lopez, MD
Lopez, EC
AF Birkle, P.
Pruess, K.
Xu, T.
Hernandez Figueroa, R. A.
Diaz Lopez, M.
Contreras Lopez, E.
TI Using Laboratory Flow Experiments and Reactive Chemical Transport
Modeling for Designing Waterflooding of the Agua Fria Reservoir, Poza
Rica-Altamira Field, Mexico
SO SPE RESERVOIR EVALUATION & ENGINEERING
LA English
DT Article; Proceedings Paper
CT 2006 SPE 1st International Oil Conference and Exhibition
CY AUG 31-SEP 02, 2006
CL Cancun, MEXICO
SP Soc Petr Engineers
ID GEOCHEMICAL TRANSPORT; FLUID-FLOW; MEDIA
AB Waterflooding for enhanced oil recovery requires that injected waters must be chemically compatible with connate reservoir waters, ill order to avoid mineral dissolution-and-precipitation cycles that Could seriously degrade formation permeability and injectivity. Formation Plugging is a concern especially in reservoirs with it large content of carbonates, such as calcite and dolomite, as such minerals typically react rapidly with all aqueous phase, and have strongly temperature-dependent solubility. Clay swelling also can pose problems. During a preliminary waterflooding pilot project, the Poza Rica-Altamira oil field, bordering the Gulf coast in the eastern part of Mexico, experienced injectivity loss after 5 months of reinjection of formation waters into Well AF-847 in 1999. Acidizing with hydrochloric acid (HCl) restored injectivity.
We report oil laboratory experiments and reactive-chemistry modeling Studies that were undertaken in preparation for long-term waterflooding at the Agua Fria reservoir. Using analogous core plugs obtained from the same reservoir interval, laboratory coreflood experiments were conducted to examine file sensitivity of mineral-dissolution and -precipitation effects to water composition. Native reservoir water, chemically altered waters, and distilled water Were used, and temporal changes ill core permeability, mineral quantities, and aqueous concentrations of Solutes were monitored. The experiments were simulated with the multiphase nonisothermal reactive transport code TOUGHREACT(TM) (Lawrence Berkeley National Laboratory, Berkeley, California, 2004), and reasonable-to-good agreement was obtained for changes in solute concentrations. Clay swelling Caused all additional impact oil permeability behavior during coreflood experiments, whereas the modeled permeability depends exclusively oil chemical processes. TOUGHREACT was then used for reservoirscale simulation of injecting ambient-temperature water (30 degrees C 86 degrees F) into a reservoir with initial temperature of 80 degrees C (176 degrees F). Untreated native reservoir water was found to cause serious porosity and permeability reduction because of calcite precipitation, which is promoted by the retrograde solubility of this mineral. Using treated water that performed well in the laboratory flow experiments was found to avoid excessive precipitation and allowed injection to proceed.
C1 [Pruess, K.; Xu, T.] Lawrence Berkeley Natl Lab, Berkeley, CA USA.
EM birkle@iie.org.mx; Tianfu_Xu@ibl.gov
NR 16
TC 2
Z9 2
U1 0
U2 7
PU SOC PETROLEUM ENG
PI RICHARDSON
PA 222 PALISADES CREEK DR,, RICHARDSON, TX 75080 USA
SN 1094-6470
EI 1930-0212
J9 SPE RESERV EVAL ENG
JI SPE Reserv. Eval. Eng.
PD DEC
PY 2008
VL 11
IS 6
BP 1029
EP 1045
PG 17
WC Energy & Fuels; Engineering, Petroleum; Geosciences, Multidisciplinary
SC Energy & Fuels; Engineering; Geology
GA 392TO
UT WOS:000262325300008
ER
PT J
AU Sparks, CM
Lanee, S
Beebe, M
Page, M
AF Sparks, Chris M.
Lanee, Sidi
Beebe, Meredith
Page, Matthew
TI Photovoltaic substrates and hafnium based gate dielectrics characterized
with total reflection X-ray fluorescence
SO SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
LA English
DT Article; Proceedings Paper
CT 12th International Conference on Total Reflection X-Ray Fluorescence
Analysis and Related Methods
CY JUN 18-22, 2007
CL Trento, ITALY
SP Univ Trento, Fac Sci, Fdn Bruno Kessler, Ctr Mat & Microsyst
DE Total reflection X-ray fluorescence; TXRF; Photovoltaic; Hafnium
silicate dielectric
ID MULTICRYSTALLINE SILICON; METAL IMPURITIES; SOLAR-CELLS; SPECTROMETRY;
DIOXIDE
AB In this study, the capabilities of total reflection X-ray fluorescence spectroscopy characterization for both the photovoltaic industry and advanced semiconductor processing were investigated. Analysis of single crystal silicon coupon samples from various cleans during photovoltaic processing showed that certain clean steps were more effective in removing trace metal contamination. The multicrystalline photovoltaic silicon sample also had detected, but difficult to quantify, metallic contamination. Changes in the silicon dioxide content of hafnium silicate films used in semiconductor processing were also characterized by total reflection X-ray fluorescence spectroscopy analysis. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Sparks, Chris M.; Lanee, Sidi] SVTC Technol, Austin, TX 78741 USA.
[Beebe, Meredith] Technos Int, Tempe, AZ 85281 USA.
[Page, Matthew] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Sparks, CM (reprint author), SVTC Technol, Austin, TX 78741 USA.
EM chris.sparks@svtc.com
NR 13
TC 0
Z9 0
U1 0
U2 1
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0584-8547
J9 SPECTROCHIM ACTA B
JI Spectroc. Acta Pt. B-Atom. Spectr.
PD DEC
PY 2008
VL 63
IS 12
BP 1351
EP 1354
DI 10.1016/j.sab.2008.10.032
PG 4
WC Spectroscopy
SC Spectroscopy
GA 389FR
UT WOS:000262077200002
ER
PT J
AU ter Braak, CJF
Vrugt, JA
AF ter Braak, Cajo J. F.
Vrugt, Jasper A.
TI Differential Evolution Markov Chain with snooker updater and fewer
chains
SO STATISTICS AND COMPUTING
LA English
DT Article
DE Evolutionary Monte Carlo; Metropolis algorithm; Adaptive Markov chain
Monte Carlo; Theophylline kinetics; Adaptive direction sampling;
Parallel computing; Differential evolution
ID MONTE-CARLO; ALGORITHMS; OPTIMIZATION; CONVERGENCE; SPACES; MCMC
AB Differential Evolution Markov Chain (DE-MC) is an adaptive MCMC algorithm, in which multiple chains are run in parallel. Standard DE-MC requires at least N=2d chains to be run in parallel, where d is the dimensionality of the posterior. This paper extends DE-MC with a snooker updater and shows by simulation and real examples that DE-MC can work for d up to 50-100 with fewer parallel chains (e.g. N=3) by exploiting information from their past by generating jumps from differences of pairs of past states. This approach extends the practical applicability of DE-MC and is shown to be about 5-26 times more efficient than the optimal Normal random walk Metropolis sampler for the 97.5% point of a variable from a 25-50 dimensional Student t (3) distribution. In a nonlinear mixed effects model example the approach outperformed a block-updater geared to the specific features of the model.
C1 [ter Braak, Cajo J. F.] Wageningen Univ & Res Ctr, NL-6700 AC Wageningen, Netherlands.
[Vrugt, Jasper A.] Los Alamos Natl Lab, CNLS, Los Alamos, NM 87545 USA.
RP ter Braak, CJF (reprint author), Wageningen Univ & Res Ctr, Box 100, NL-6700 AC Wageningen, Netherlands.
EM Cajo.terbraak@wur.nl
RI Vrugt, Jasper/C-3660-2008; ter Braak, Cajo/G-7006-2011
OI ter Braak, Cajo/0000-0002-0414-8745
NR 26
TC 92
Z9 92
U1 1
U2 19
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0960-3174
EI 1573-1375
J9 STAT COMPUT
JI Stat. Comput.
PD DEC
PY 2008
VL 18
IS 4
BP 435
EP 446
DI 10.1007/s11222-008-9104-9
PG 12
WC Computer Science, Theory & Methods; Statistics & Probability
SC Computer Science; Mathematics
GA 382LN
UT WOS:000261607600007
ER
PT J
AU Solovyov, VF
Li, Q
Wiesmann, H
Oleynikov, P
Zhu, YM
AF Solovyov, Vyacheslav F.
Li, Qiang
Wiesmann, Harold
Oleynikov, Peter
Zhu, Yimei
TI Strong influence of the YBa(2)Cu(3)O(7) grain size on critical current
densities of thick YBa(2)Cu(3)O(7) layers made by a metal-organic
deposition process
SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY
LA English
DT Article
ID YBCO-COATED CONDUCTORS; FILMS; SUPERCONDUCTORS; PROGRESS; WIRE
AB We correlate the critical current performance of thick film second-generation YBa(2)Cu(3)O(7) (YBCO) coated conductors, made by metal-organic deposition, with specimen grain size. The transport critical current densities, J(c)(T), of these conductors were observed to be inversely proportional to YBCO grain size in the 5-40 mu m size range. Analysis of magnetic hysteresis curves of the conductors and transmission electron microscopy data from a large YBCO grain revealed that the reduced J(c)(T) in tapes with large YBCO grain size is due to the accumulation of secondary phase precipitates within the grains near the periphery of, and in, the grain boundaries. Grain size is determined to be one of the important factors in determining J(c)(T) of YBCO coated conductors made by the metal-organic processes.
C1 [Solovyov, Vyacheslav F.; Li, Qiang; Wiesmann, Harold; Zhu, Yimei] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
[Oleynikov, Peter; Zhu, Yimei] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
RP Solovyov, VF (reprint author), Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
RI Solovyov, Vyacheslav/A-7724-2009;
OI Solovyov, Vyacheslav/0000-0003-1879-9802
FU US Department of Energy [DE-AC02-98CHI-886]
FX The authors greatly appreciate cooperation from Martin Rupich and
Xiaoping Li of American Superconductor Corp. who provided the thick film
2G tapes for this study. The authors appreciate fruitful discussions
with Dr Mas Suenaga. This manuscript has been authored by Brookhaven
Science Associates, LLC under contract no. DE-AC02-98CHI-886 with the US
Department of Energy.
NR 20
TC 9
Z9 9
U1 0
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-2048
J9 SUPERCOND SCI TECH
JI Supercond. Sci. Technol.
PD DEC
PY 2008
VL 21
IS 12
AR 125013
DI 10.1088/0953-2048/21/12/125013
PG 5
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 374NG
UT WOS:000261049900014
ER
PT J
AU Fadley, CS
AF Fadley, Chades S.
TI Atomic-level characterization of materials with core- and valence-level
photoemission: basic phenomena and future directions
SO SURFACE AND INTERFACE ANALYSIS
LA English
DT Article; Proceedings Paper
CT 6th International Symposium on Atomic Level Characterization for New
Materials and Devices
CY OCT 28-NOV 02, 2007
CL Kanazawa, JAPAN
DE photoelectron spectroscopy; XPS; photoemission; synchrotron radiation
ID RAY PHOTOELECTRON-SPECTROSCOPY; AUGER-ELECTRON-SPECTROSCOPY;
ANGULAR-DISTRIBUTION PARAMETERS; MAGNETIC CIRCULAR-DICHROISM; RANGE
100-5000 EV; BINDING ENERGIES; SURFACE-ANALYSIS; CROSS-SECTIONS;
DIFFRACTION; TIME
AB In this overview, the basic concepts of core and valence photoelectron spectroscopy (photoemission), photoelectron diffraction and photoelectron holography are introduced. Then some current developments in these techniques that should enhance their utility for atomic-level characterization of new materials and surface chemical processes are discussed, including measurements with hard X-ray excitation, standing-wave excitation, and ambient pressures in the multi-torr regime. Copyright (C) 2008 John Wiley & Sons, Ltd.
C1 [Fadley, Chades S.] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
[Fadley, Chades S.] Univ Calif Berkeley, Lawrence Berkeley Lab, 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
NR 95
TC 21
Z9 21
U1 3
U2 9
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0142-2421
EI 1096-9918
J9 SURF INTERFACE ANAL
JI Surf. Interface Anal.
PD DEC
PY 2008
VL 40
IS 13
BP 1579
EP 1605
DI 10.1002/sia.2902
PG 27
WC Chemistry, Physical
SC Chemistry
GA 390NC
UT WOS:000262170000002
ER
PT J
AU Yoo, TS
Garcia, HE
AF Yoo, Tae-Sic
Garcia, Humberto E.
TI Diagnosis of behaviors of interest in partially-observed discrete-event
systems
SO SYSTEMS & CONTROL LETTERS
LA English
DT Article
DE Discrete-event systems; Behaviors of interest detection; Detection delay
computation
ID DIAGNOSABILITY
AB In this paper, we address the problem of diagnosing the behaviors of interest in discrete-event systems. To this end, we introduce the notion of language-diagnosability, based on language specifications that generalizes diagnosability based on event specifications. A polynomial-time algorithm for verifying language-diagnosability is developed. Building upon the verification algorithm, we develop a polynomial-time algorithm for computing the worst case detection delay of a given system. The computation of the worst case detection delay involves the shortest path computation of a weighted, directed graph. We exploit a special weighting structure of the graph resulting from the verification algorithm, which enables an algorithm with a lower complexity than the commonly used Bellman-Ford shortest path algorithm. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Garcia, Humberto E.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
[Yoo, Tae-Sic] Idaho Natl Lab, Idaho Falls, ID 83403 USA.
RP Garcia, HE (reprint author), Idaho Natl Lab, MS 3605,POB 1625, Idaho Falls, ID 83415 USA.
EM Tae-Sic.Yoo@inl.gov; Humberto.Garcia@inl.gov
FU U.S. Department of Energy [W-31-109-Eng-38, DE-AC07-05ID14517]
FX The research reported in this paper was supported in part by the U.S.
Department of Energy under contract W-31-109-Eng-38 and
DE-AC07-05ID14517.
NR 16
TC 17
Z9 17
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-6911
J9 SYST CONTROL LETT
JI Syst. Control Lett.
PD DEC
PY 2008
VL 57
IS 12
BP 1023
EP 1029
DI 10.1016/j.sysconle.2008.06.009
PG 7
WC Automation & Control Systems; Operations Research & Management Science
SC Automation & Control Systems; Operations Research & Management Science
GA 373KT
UT WOS:000260971200008
ER
PT J
AU Anders, A
Slack, JL
Richardson, TJ
AF Anders, Andre
Slack, Jonathan L.
Richardson, Thomas J.
TI Electrochromically switched, gas-reservoir metal hydride devices with
application to energy-efficient windows
SO THIN SOLID FILMS
LA English
DT Article
DE Switchable mirror; Smart windows; MnNiMg alloy; Cycling; Durability
ID OPTICAL-PROPERTIES; FILMS; MIRRORS
AB Proof-of-principle gas-reservoir MnNiMg electrochromic mirror devices have been investigated. In contrast to conventional electrochromic approaches, hydrogen is stored (at low concentration) in the gas Volume between glass panes of the insulated glass units (IGUs). The elimination of a solid state ion storage layer simplifies the layer stack, enhances overall transmission, and reduces cost. The cyclic switching properties were demonstrated and system durability improved with the incorporation a thin Zr barrier layer between the MnNiMg layer and the Pd catalyst. Addition of 9% silver to the palladium catalyst further improved system durability. About 100 full cycles have been demonstrated before devices slow considerably. Degradation of device performance appears to be related to Pd catalyst mobility, rather than delamination or metal layer oxidation issues originally presumed likely to present significant challenges. (C) 2008 Published by Elsevier B.V.
C1 [Anders, Andre; Slack, Jonathan L.; Richardson, Thomas J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Anders, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM aanders@lbl.gov
RI Anders, Andre/B-8580-2009
OI Anders, Andre/0000-0002-5313-6505
FU Assistant Secretary for Energy Efficiency and Renewable Energy, Office
of Building Technology, of the U.S. Department of Energy
[DE-AC02-05CH11231]
FX We gratefully thank Sunnie Lim and Ju Lin Peng from RMIT Microscopy and
Microanalysis Facility, Melbourne, Australia, for the TEM image of the
Pd catalyst. We further acknowledge support by Annica Nilsson, Sam Blau,
David Horwat, and Jan Isidorsson. This work was supported by the
Assistant Secretary for Energy Efficiency and Renewable Energy, Office
of Building Technology, of the U.S. Department of Energy under Contract
No. DE-AC02-05CH11231.
NR 16
TC 10
Z9 10
U1 0
U2 7
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 DEC 1
PY 2008
VL 517
IS 3
BP 1021
EP 1026
DI 10.1016/j.tsf.2008.06.056
PG 6
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 388XO
UT WOS:000262053800004
ER
PT J
AU Medrano-Soto, A
Pal, D
Eisenberg, D
AF Medrano-Soto, Arturo
Pal, Debnath
Eisenberg, David
TI Inferring molecular function: contributions from functional linkages
SO TRENDS IN GENETICS
LA English
DT Article
ID PROTEIN-FUNCTION PREDICTION; CRYSTAL-STRUCTURE; DATABASE
AB In the current era of high-throughput sequencing and structure determination, functional annotation has become a bottleneck in biomedical science. Here, we show that automated inference of molecular function using functional linkages among genes increases the accuracy of functional assignments by >= 8% and enriches functional descriptions in >= 34% of top assignments. Furthermore, biochemical literature supports >80% of automated inferences for previously unannotated proteins. These results emphasize the benefit of incorporating functional linkages in protein annotation.
C1 [Medrano-Soto, Arturo; Eisenberg, David] Howard Hughes Med Inst, Los Angeles, CA 90095 USA.
[Medrano-Soto, Arturo; Eisenberg, David] Univ Calif Los Angeles, DOE Inst Genom & Proteom, Los Angeles, CA 90095 USA.
[Pal, Debnath] Indian Inst Sci, Bioinformat Ctr & Supercomp Educ Res Ctr, Bangalore 560012, Karnataka, India.
RP Eisenberg, D (reprint author), Howard Hughes Med Inst, 675C E Young Dr S, Los Angeles, CA 90095 USA.
EM david@mbi.ucla.edu
RI Pal, Debnath/B-8750-2008
FU NIH; DOE; HHMI
FX The authors thank C. Miller and R. Llewellyn for valuable discussion, D.
Cascio, T. Holton and A. Lisker for technical support and the NIH, DOE
and HHMI for financial support.
NR 19
TC 2
Z9 3
U1 0
U2 0
PU ELSEVIER SCIENCE LONDON
PI LONDON
PA 84 THEOBALDS RD, LONDON WC1X 8RR, ENGLAND
SN 0168-9525
J9 TRENDS GENET
JI Trends Genet.
PD DEC
PY 2008
VL 24
IS 12
BP 587
EP 590
DI 10.1016/j.tig.2008.10.001
PG 4
WC Genetics & Heredity
SC Genetics & Heredity
GA 383ZD
UT WOS:000261712100002
PM 18951645
ER
PT J
AU Blau, P
Brummett, T
AF Blau, P. J.
Brummett, T. M.
TI High-Temperature Oxide Regrowth on Mechanically Damaged Surfaces
SO TRIBOLOGY LETTERS
LA English
DT Article
DE Diesel engines; Non-ferrous alloys; Nickel; EDS; Abrasive wear;
Oxidative wear
ID ALLOYS; WEAR; FRICTION; NICKEL; LAYERS
AB X-ray elemental maps are used with single-point abrasion tests of a nickel-based superalloy, exposed to air at 850C, to demonstrate how high-temperature oxidation products form differently on damaged and non-damaged tribosurfaces. These findings complement previous work on the nature of sliding combined with oxidation. Results have implications for modeling the wear processes of exhaust valves in internal combustion engines.
C1 [Blau, P. J.; Brummett, T. M.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Blau, P (reprint author), Oak Ridge Natl Lab, POB 2008,Mail Stop 6063, Oak Ridge, TN 37831 USA.
EM blaupj@ornl.gov; weartester@msn.com
FU U.S. Department of Energy, Energy Efficiency and Renewable Energy,
Office of Vehicle Technologies [DE-AC05-00R22725]; UT-Battelle, LLC;
Materials Science and Technology Division; Oak Ridge National Laboratory
FX The authors gratefully acknowledge support from the U.S. Department of
Energy, Energy Efficiency and Renewable Energy, Office of Vehicle
Technologies, under contract DE-AC05-00R22725 with UT-Battelle, LLC.
Constructive comments from Bruce Pint, James Keiser, and Michael Lance
in the Materials Science and Technology Division, Oak Ridge National
Laboratory, and the journal reviewer's suggestions are appreciated.
NR 17
TC 4
Z9 4
U1 1
U2 2
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1023-8883
J9 TRIBOL LETT
JI Tribol. Lett.
PD DEC
PY 2008
VL 32
IS 3
BP 153
EP 157
DI 10.1007/s11249-008-9372-8
PG 5
WC Engineering, Chemical; Engineering, Mechanical
SC Engineering
GA 374IW
UT WOS:000261038000002
ER
PT J
AU Malac, M
Beleggia, M
Taniguchi, Y
Egerton, RF
Zhu, Y
AF Malac, Marek
Beleggia, Marco
Taniguchi, Yoshifumi
Egerton, Ray F.
Zhu, Yimei
TI Low-dose performance of parallel-beam nanodiffraction
SO ULTRAMICROSCOPY
LA English
DT Article
DE Electron diffraction; Low-dose microscopy; Radiation damage; TEM
imaging; Phase contrast; Nanoparticle
ID ELECTRON-DIFFRACTION; ALGORITHMS; TEM
AB We evaluate the low-dose performance of parallel nano-beam diffraction (NBD) in the transmission electron microscope as a method for characterizing radiation sensitive materials at low electron irradiation dose. A criterion, analogous to Rose's, is established for detecting a diffraction spot with desired signal-to-noise ratio. Our experimental data show that a dose substantially lower than in high-resolution bright-field imaging is sufficient to determine structure and orientation of individual nanoscale objects embedded in amorphous matrix. In an instrument equipped with a cold field-emission gun it is possible to form a probe with sub-3 nm diameter and sub-0.3 mrad convergence angle with sufficient beam current to record a diffraction pattern with less than 0.2 s acquisition time. The interpretation of NBD patterns is identical to that of selected area diffraction patterns. We illustrate the physical principles underlying good low-dose performance of NBD by means of a phase grating. The electron irradiation dose needed to detect a diffraction peak in NBD is found proportional to 1/N(2), where N is the number of lattice planes contributing to the peak. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Malac, Marek; Egerton, Ray F.] Natl Inst Nanotechnol, Edmonton, AB T6G 2M9, Canada.
[Malac, Marek; Egerton, Ray F.] Univ Alberta, Dept Phys, Edmonton, AB T6G 2M9, Canada.
[Beleggia, Marco] Univ Leeds, Inst Mat Res, Leeds LS2 9JT, W Yorkshire, England.
[Taniguchi, Yoshifumi] Hitachi High Technol Corp, Hitachinaka, Ibaraki 3128504, Japan.
[Zhu, Yimei] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Malac, M (reprint author), Natl Inst Nanotechnol, 11421 Saskatachewan Dr, Edmonton, AB T6G 2M9, Canada.
EM mmarecek2000@yahoo.com; m.beleggia@leeds.ac.uk;
taniguchi-yoshifumi@naka.hitachi-hitec.com; egerton@phys.ualberta.ca;
zhu@bnl.gov
OI Beleggia, Marco/0000-0002-2888-1888
FU National Research Council (NRC); NINT; NSERC; US Department of Energy,
Basic Energy Sciences [DE-AC02-98CH10886]; Royal Society in UK
FX Financial support was provided by the National Research Council (NRC),
NINT and NSERC in Canada and by the US Department of Energy, Basic
Energy Sciences, contract number DE-AC02-98CH10886 and by the Royal
Society in UK. We acknowledge NINT (NRC) for financing the Hitachi HF
3300 instrument at NINT and Hitachi High Technologies for excellent
ongoing support. The authors are thankful to Dr. Feng Wang for providing
the sample and for help in indexing the experimental diffraction
patterns.
NR 22
TC 7
Z9 7
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3991
J9 ULTRAMICROSCOPY
JI Ultramicroscopy
PD DEC
PY 2008
VL 109
IS 1
BP 14
EP 21
DI 10.1016/j.ultramic.2008.07.004
PG 8
WC Microscopy
SC Microscopy
GA 384NC
UT WOS:000261750500003
PM 18768263
ER
PT J
AU Mentzer, SE
Sundberg, JP
Awgulewitsch, A
Chao, HHJ
Carpenter, DA
Zhang, WD
Rinchik, EM
You, Y
AF Mentzer, Sarah E.
Sundberg, John P.
Awgulewitsch, Alexander
Chao, Hanna H. J.
Carpenter, Donald A.
Zhang, Wei-Dong
Rinchik, Eugene M.
You, Yun
TI The mouse hairy ears mutation exhibits an extended growth (anagen) phase
in hair follicles and altered Hoxc gene expression in the ears
SO VETERINARY DERMATOLOGY
LA English
DT Article
ID CLUSTER; MICE; MOUSE-CHROMOSOME-15; DISRUPTION; DROSOPHILA; INVERSION;
CYCLE; SKIN
AB The mouse In(15)2Rl (hairy ears, Eh) mutation is a paracentric inversion of the distal half of chromosome 15 (Chr 15). Heterozygous Eh/+ mice display misshaped and hairy ears that have more and longer hair than the ears of their wild-type littermates. We mapped, cloned and sequenced both inversion breakpoints. No protein-coding transcript was disrupted by either breakpoint. The proximal breakpoint is located between syntrophin basic 1 (Sntb1) and hyaluronan synthase 2 (Has2), and the distal breakpoint maps between homeobox C4 (Hoxc4) and single-strand selective monofunctional uracil DNA glycosylase (Smug1), near the middle and the telomere ends of Chr 15, respectively. The inversion spans 47 megabases. Our genetic analysis suggests that the hairy-ear phenotype is caused by the proximal breakpoint of the inversion-bearing Chr 15. Quantitative RNA analysis by real-time polymerase chain reaction for the genes flanking the breakpoint indicated no changes in expression levels except for some homeobox C (Hoxc) genes whose expression was elevated in developing and mature skin of the ears but not of other body regions. The increased hair length on the ears of Eh/+ mice was due to an extension of the anagen stage in the hair cycle, as determined by histological analysis. Our data indicate that the Eh phenotype arises from mis-expression of Hoxc genes.
C1 [Mentzer, Sarah E.; Chao, Hanna H. J.; Carpenter, Donald A.; Rinchik, Eugene M.; You, Yun] Oak Ridge Natl Lab, Div Life Sci, Mammalian Genet & Genom Grp, Oak Ridge, TN 37831 USA.
[Sundberg, John P.; Zhang, Wei-Dong] Jackson Lab, Bar Harbor, ME USA.
[Awgulewitsch, Alexander] Med Univ S Carolina, Dept Med, Charleston, SC 29425 USA.
[Awgulewitsch, Alexander] Med Univ S Carolina, Dept Dermatol, Charleston, SC 29425 USA.
RP You, Y (reprint author), 295 Congress Ave,BCMM,Room 233, New Haven, CT 06519 USA.
EM yun.you@yale.edu
FU ORNL; Jackson Laboratory [BAC 28D4]; National Human Genome Research
Institute at the NIH [BAC 43P19]
FX We acknowledge the assistance of T-Y.S. Lu, M.L. York, L.J. Hauser and
N.L.A. Cacheiro at ORNL with this project, and B. A. Sundberg with the
Eh hair plates and graphic design of Fig. 2. The authors also thank E.
Michaud and C. Culiat for review of the manuscript, and T. Kunieda (
Okayama University, Japan) for discussing the Eh mutation. BAC 28D4 was
obtained from Dr Frankel's laboratory at the Jackson Laboratory, and BAC
43P19 was obtained from Dr Pavan's laboratory at the National Human
Genome Research Institute at the NIH.
NR 43
TC 4
Z9 4
U1 1
U2 3
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0959-4493
J9 VET DERMATOL
JI Vet. Dermatol.
PD DEC
PY 2008
VL 19
IS 6
BP 358
EP 367
DI 10.1111/j.1365-3164.2008.00709.x
PG 10
WC Dermatology; Veterinary Sciences
SC Dermatology; Veterinary Sciences
GA 378OS
UT WOS:000261334400004
PM 19037915
ER
PT J
AU Swenson, NG
Fair, JM
Heikoop, J
AF Swenson, Nathan G.
Fair, Jeanne M.
Heikoop, Jeff
TI WATER STRESS AND HYBRIDIZATION BETWEEN QUERCUS GAMBELII AND QUERCUS
GRISEA
SO WESTERN NORTH AMERICAN NATURALIST
LA English
DT Article
DE functional traits; GIS; hybrid zone; specific leaf area; range
boundaries; stable isotopes
ID CARBON-ISOTOPE DISCRIMINATION; HYBRID ZONE; PLANTS; SPECIATION; RATIO;
CONTACT; COMPLEX
AB The historical and environmental forces involved in determining the geographic location of plant hybrid zones have long been of interest. Often hybrid zones appear to be intimately tied to the environment, yet because many abiotic factors covary it is often difficult to understand which are truly the most important in maintaining the position and structure of a hybrid zone. This study uses empirical data and modeling analyses to examine whether abiotic factors are responsible for the location and structure of an oak (Quercus) hybrid zone and, if so, which factors are the most important. Specifically, leaf trait measurements and ecological niche models were used to test the hypothesis that water availability plays it primary role in promoting and maintaining the location of hybridization between 2 species. Leaf trait analyses and ecological niche models both supported the hypothesis that water availability determines the location and structure of the hybrid zone. These findings lend support for the general importance of environmental factors in determining hybrid zone location and structure. Furthermore, they demonstrate how functional trait analyses and predictive ecological niche models can be used in future hybrid zone research.
C1 [Swenson, Nathan G.] New Mexico State Univ, Dept Biol, Las Cruces, NM 88003 USA.
[Swenson, Nathan G.; Fair, Jeanne M.] Los Alamos Natl Lab, Ecol Grp, Div Risk Reduct & Environm Stewardship, Los Alamos, NM 87545 USA.
[Heikoop, Jeff] Los Alamos Natl Lab, Div Earth & Environm Sci, Hydrol Geochem & Geol Grp, Los Alamos, NM 87545 USA.
RP Swenson, NG (reprint author), Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721 USA.
EM swenson@email.arizona.edu
RI Heikoop, Jeffrey/C-1163-2011; Swenson, Nathan/A-3514-2012
OI Swenson, Nathan/0000-0003-3819-9767
FU Los Alamos National Laboratory-New Mexico Experimental Program to
Stimulate Competitive Research; Sigma Xi
FX We thank Julianna Fessenden-Rahn and Marcey Hess for their assistance in
running the isotopic analyses. We also thank Dan Howard, Mike DeMers,
and Vince Gutschick for discussions concerning an early version of the
manuscript. NGS was supported by a graduate research fellowship from Los
Alamos National Laboratory-New Mexico Experimental Program to Stimulate
Competitive Research and also by a grant-in-aid of research from Sigma
Xi.
NR 42
TC 4
Z9 4
U1 0
U2 3
PU BRIGHAM YOUNG UNIV
PI PROVO
PA 290 LIFE SCIENCE MUSEUM, PROVO, UT 84602 USA
SN 1527-0904
EI 1944-8341
J9 WEST N AM NATURALIST
JI West. North Am. Naturalist
PD DEC
PY 2008
VL 68
IS 4
BP 498
EP 507
DI 10.3398/1527-0904-68.4.498
PG 10
WC Biodiversity Conservation; Ecology
SC Biodiversity & Conservation; Environmental Sciences & Ecology
GA 395AU
UT WOS:000262495200009
ER
PT J
AU Fair, JM
Whitaker, SJ
AF Fair, J. M.
Whitaker, S. J.
TI AVIAN CELL-MEDIATED IMMUNE RESPONSE TO DROUGHT
SO WILSON JOURNAL OF ORNITHOLOGY
LA English
DT Article
ID HOUSE SPARROWS; BODY CONDITION; GREAT TITS; BROOD SIZE;
IMMUNOCOMPETENCE; CLIMATE; PHYTOHEMAGGLUTININ; STRESS; GROWTH; BIRDS
AB Regional droughts have far-reaching, substantial, and easily recognizable impacts on populations and the environment. One Component 017 these impacts that is not widely recognized is impairment of immune function by drought-related physiological stress. We studied cell-mediated immune function of cavity-nestling Western Bluebirds (Sialia mexicana), Ash-throated Flycatchers (Myiarchus cinerascens), and Violet-green Swallows (Tachycineta thalassina) at Los Alamos, New Mexico. There Was it dramatic decrease ill the cell-mediated immune responsiveness of developing nestlings associated with unusually dry conditions. Adult Western Bluebirds captured in 2002 weighed 7% less than in all previous years and average clutch size for all three species was reduced by 21% in 2002. Nestling body mass was also reduced for flycatcher and bluebird nestlings in 2002 compared to all other Years. Survival to fledging age was lower overall during the drought years of 2000-2002 compared to the first 3 years of the study.
C1 [Fair, J. M.; Whitaker, S. J.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Fair, JM (reprint author), Los Alamos Natl Lab, MS J495, Los Alamos, NM 87545 USA.
EM jmfair@lanl.gov
FU Los Alamos National Security LLC; Los Alamos National Laboratory
[DEAC52-06NA25396]; U.S. Department of Energy
FX We thank P. C. Beeson, K. F Colestock-, L. A. Haus-samen. Tina Sommer,
and C. E. Talus for excellence in field assistance. We thank C. D.
Allen, D. B. Breshears, M.H. Ebinger, H. A. Hinojosa, J. M. Heikoop. L.
K. Marsh, R M. Rich, and R.E. Ricklefs for comments on an earlier draft.
We also thank B. K. Sandercock for helpful comments on the manuscript.
We thank O.B. Myers for initiation of the nest box-monitoring network.
The animal care and use committees of both LANL and the University of
Missouri-St. Louis approved all protocols. This research was funded by
the Environmental Restoration Program through Los Alamos National
Security LLC, operator of the Los Alamos National Laboratory under
Contract DEAC52-06NA25396 with the U.S. Department of Energy.
NR 40
TC 5
Z9 5
U1 2
U2 8
PU WILSON ORNITHOLOGICAL SOC
PI WACO
PA 5400 BOSQUE BLVD, STE 680, WACO, TX 76710 USA
SN 1559-4491
J9 WILSON J ORNITHOL
JI Wilson J. Ornithol.
PD DEC
PY 2008
VL 120
IS 4
BP 813
EP 819
DI 10.1676/06-052.1
PG 7
WC Ornithology
SC Zoology
GA 392TV
UT WOS:000262326000017
ER
PT J
AU Sykes, R
Kodrzycki, B
Tuskan, G
Foutz, K
Davis, M
AF Sykes, Robert
Kodrzycki, Bob
Tuskan, Gerald
Foutz, Kirk
Davis, Mark
TI Within tree variability of lignin composition in Populus
SO WOOD SCIENCE AND TECHNOLOGY
LA English
DT Article
ID NEAR-INFRARED SPECTROSCOPY; WOOD PROPERTIES; EUCALYPTUS-GLOBULUS;
LOBLOLLY-PINE; BASIC DENSITY; FIBER LENGTH; BREEDING OBJECTIVES; CLONAL
TRIALS; SELECTION AGE; PULP YIELD
AB Clonal variability among trees has been studied and found to have profound effects on nearly all measured phenotypes. However, when estimating wood properties it is important to consider variability within the tree. The position in which a tree is sampled could have a large influence on biomass characterization. We looked at variability in lignin content as height increases and as the number of rings from the pith increase in Populus species. Seven trees were destructively sampled; subsamples were obtained along a 2.4 m length of each stem and across increment rings. All samples were analyzed by pyrolysis molecular beam mass spectroscopy to map the variability across sampling heights and/or ring positions in lignin content. The results of this study indicate that when sampling a tree, there is more variability from ring to ring than at different heights going up the stem.
C1 [Sykes, Robert; Davis, Mark] Natl Renewable Energy Lab, Natl Bioenergy Ctr, Golden, CO 80401 USA.
[Kodrzycki, Bob; Foutz, Kirk] ArborGen LLC, Summerville, SC 29484 USA.
[Tuskan, Gerald] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Sykes, R (reprint author), Natl Renewable Energy Lab, Natl Bioenergy Ctr, 1617 Cole Blvd, Golden, CO 80401 USA.
EM Robert_Sykes@nrel.gov
RI Tuskan, Gerald/A-6225-2011;
OI Tuskan, Gerald/0000-0003-0106-1289; davis, mark/0000-0003-4541-9852
NR 34
TC 42
Z9 42
U1 2
U2 15
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0043-7719
J9 WOOD SCI TECHNOL
JI Wood Sci. Technol.
PD DEC
PY 2008
VL 42
IS 8
BP 649
EP 661
DI 10.1007/s00226-008-0199-0
PG 13
WC Forestry; Materials Science, Paper & Wood
SC Forestry; Materials Science
GA 365AY
UT WOS:000260379500004
ER
PT J
AU Brugger, J
Etschmann, B
Pownceby, M
Liu, WH
Grundler, P
Brewe, D
AF Brugger, Joel
Etschmann, Barbara
Pownceby, Mark
Liu, Weihua
Grundler, Pascal
Brewe, Dale
TI Oxidation state of europium in scheelite: Tracking fluid-rock
interaction in gold deposits
SO CHEMICAL GEOLOGY
LA English
DT Article
DE Hydrothermal fluid; Rare earth element geochemistry; Europium; Gold
deposit; Synchrotron radiation; Scheelite
ID MOLAL THERMODYNAMIC PROPERTIES; WESTERN-AUSTRALIA; HYDROTHERMAL SYSTEMS;
REPLACEMENT REACTIONS; HIGH-PRESSURES; EARTH; KALGOORLIE; CHARLOTTE;
STANDARD; XANES
AB We used mu-XANES spectroscopy to measure the oxidation state of europium in-situ at near-mu m resolution ill hydrothermal scheelite from the giant Archean gold deposits of Kalgoorlie, Western Australia. By combining these measurements with mu-XRF imaging, it is possible to distinguish inhomogeneities in Eu(2+)/Eu(3+) ratios that developed during mineral precipitation from the effects of subsequent hydrothermal alteration and weathering. Thermodynamic analysis reveals that under the conditions typical of the formation of many Au deposits, the Eu(2+)Eu(3+) ratio in the hydrothermal fluid is highly sensitive to pH. The range in pH calculated from the Eu(2+)/Eu(3+) ratios in the analyzed scheelite corresponds to a maximum in Au solubility under the ore-forming conditions, and suggests buffering of pH by the CO(2(aq))-rich fluid. The primary heterogeneity of the Karlgoorlie scheelite most likely results from pH oscillating between fluid- and rock-buffered conditions, and reflects the dynamics of the hydrothermal system. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Brugger, Joel; Grundler, Pascal] Univ Adelaide, S Australian Museum, Adelaide, SA 5005, Australia.
[Brugger, Joel; Grundler, Pascal] Univ Adelaide, Sch Earth & Environm Sci, Adelaide, SA 5005, Australia.
[Etschmann, Barbara; Liu, Weihua] Univ Melbourne, CSIRO Explorat & Min, Sch Phys, Melbourne, Vic 3010, Australia.
[Etschmann, Barbara] Univ Tasmania, CODES Ctr Excellence, Hobart, Tas 7001, Australia.
[Pownceby, Mark] CSIRO Minerals, Clayton, Vic 3168, Australia.
[Brewe, Dale] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Brugger, J (reprint author), Univ Adelaide, S Australian Museum, Adelaide, SA 5005, Australia.
EM Brugger.joel@saugov.sa.gov.au
RI Grundler, Pascal/A-4687-2009; Etschmann, Barbara/H-7731-2012; Liu,
Weihua/D-3684-2009; Brugger, Joel/C-7113-2008
OI Brugger, Joel/0000-0003-1510-5764
FU Australian Synchrotron Research Program; Commonwealth of Australia; U.S.
Department of Energy; Office of Science, Basic Energy Sciences
[W-31-109-Eng-38]; Australian Research Council QEll fellowship
[DP0208323]
FX This work was supported by the Australian Synchrotron Research Program,
which is funded by the Commonwealth of Australia under the Major
National Research Facilities Program. Use of the APS was supported by
the U.S. Department of Energy, Office of Science, Basic Energy Sciences,
under Contract No.W-31-109-Eng-38. JB acknowledges Australian Research
Council QEll fellowship (DP0208323). Comments by S. Sutton, J. Rakovan,
M. Bau and S. Simmons, as well as by two anonymous Chemical Geology
reviewers. greatly improved this manuscript.
NR 33
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U1 3
U2 27
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2541
J9 CHEM GEOL
JI Chem. Geol.
PD NOV 30
PY 2008
VL 257
IS 1-2
BP 26
EP 33
DI 10.1016/j.chemeo.2008.08.003
PG 8
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 381VO
UT WOS:000261564200003
ER
PT J
AU Stanis, RJ
Kuo, MC
Rickett, AJ
Turner, JA
Herring, AM
AF Stanis, Ronald J.
Kuo, Mei-Chen
Rickett, Adam J.
Turner, John A.
Herring, Andrew M.
TI Investigation into the activity of heteropolyacids towards the oxygen
reduction reaction on PEMFC cathodes
SO ELECTROCHIMICA ACTA
LA English
DT Article
DE heteropolyacid; oxygen reduction reaction; non-precious metal catalyst;
proton exchange membrane fuel cell; fuel cell cathode catalyst
ID TRIVACANT HETEROPOLYTUNGSTATE DERIVATIVES; VANADIUM-SUBSTITUTED
HETEROPOLYMOLYBDATES; KEGGIN-TYPE HETEROPOLYACIDS; FUEL-CELLS; ACTIVATED
CARBON; ELECTROCATALYST MATERIALS; CATALYTIC-OXIDATION; W-183 NMR;
ACIDS; CO
AB A total of 18 heteropolyacids (HPAs) were investigated to determine their activity as non-Pt oxygen reduction reaction (ORR) catalysts in polymer electrolyte membrane fuel cell cathodes (PEMFCs). Polarization curves, cyclic voltammetry and impedance spectroscopy determined that, of the HPAs tested, only molybdenum based HPAs are active for the ORR and that vanadium substitutions improved the activity. The reduction potentials of the HPAs in the fuel cell environment were determined by cyclic voltammetry. This showed that no activity is seen above 0.55V, as the catalysts must first be reduced in situ by 4e(-) before the HPA can reduce oxygen. The potential at which the HPA can be reduced has been determined to be the limiting factor when using these catalysts for ORR in PEMFCs. Power densities of 67 mW/cm(2) at 0.2V were obtained using H5PMo10V20O40. Molybdenum based HPAs were covalently bonded to the carbon achieving mass loadings similar to 3 x that obtained through adsorption. Using this approach catalyst, performance was improved to 86 mW/cm(2) at 0.2 V. The increased loadings did not significantly increase the potentials at which the HPA becomes active for the ORR. We were able to show that MEA degradation, as measured by F- emission rates, using these catalysts are reduced during accelerated testing protocols. (c) 2008 Elsevier Ltd. All rights reserved.
C1 [Stanis, Ronald J.; Kuo, Mei-Chen; Rickett, Adam J.; Herring, Andrew M.] Colorado Sch Mines, Dept Chem Engn, Golden, CO 80401 USA.
[Stanis, Ronald J.; Turner, John A.] Natl Renewable Energy Lab, Hydrogen & Elect Syst & Infrastruct Grp, Golden, CO 80401 USA.
RP Herring, AM (reprint author), Colorado Sch Mines, Dept Chem Engn, Golden, CO 80401 USA.
EM aherring@mines.edu
RI Herring, Andy/E-7088-2010;
OI Herring, Andrew/0000-0001-7318-5999
NR 57
TC 37
Z9 38
U1 6
U2 41
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0013-4686
J9 ELECTROCHIM ACTA
JI Electrochim. Acta
PD NOV 30
PY 2008
VL 53
IS 28
BP 8277
EP 8286
DI 10.1016/j.electacta.2008.06.052
PG 10
WC Electrochemistry
SC Electrochemistry
GA 357GW
UT WOS:000259835300026
ER
PT J
AU Cockeram, BV
Smith, RW
Leonard, KJ
Byun, TS
Snead, LL
AF Cockeram, B. V.
Smith, R. W.
Leonard, K. J.
Byun, T. S.
Snead, L. L.
TI Irradiation hardening in unalloyed and ODS molybdenum during low dose
neutron irradiation at 300 degrees C and 600 degrees C
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID SHEET TOUGHENING MECHANISM; MO-5-PERCENT RE ALLOYS; FE-X ALLOYS; TENSILE
PROPERTIES; POLYCRYSTALLINE MOLYBDENUM; DEFECT ACCUMULATION;
FRACTURE-TOUGHNESS; HEAT-TREATMENT; WROUGHT LCAC; METAL ALLOYS
AB Unalloyed molybdenum and oxide dispersion strengthened (ODS) molybdenum were irradiated at 300 degrees C and 600 degrees C in HFIR to neutron fluences of 0.2, 2.1, and 24.3 x 10(24) n/m(2) (E > 0.1 MeV). The size and number density of voids and loops as well as the measured irradiation hardening and electrical resistivity were found to increase sub-linearly with fluence. This supports the idea that the formation of the extended defects that produce irradiation hardening in molybdenum is the result of a nucleation and growth process rather than the formation of sessile defects directly from the displacement damage cascades. This conclusion is further supported by molecular dynamics (MD) simulations of cascade damage. The unalloyed molybdenum had a low impurity interstitial content with less irradiation hardening and lower change in electrical resistivity than is observed for ODS Mo. This result suggests that high-purity can result in slightly improved resistance to irradiation embrittlement in molybdenum at low fluences. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Cockeram, B. V.; Smith, R. W.] Bechtel Bettis Inc, W Mifflin, PA 15122 USA.
[Leonard, K. J.; Byun, T. S.; Snead, L. L.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Cockeram, BV (reprint author), Bechtel Bettis Inc, POB 79, W Mifflin, PA 15122 USA.
EM cockeram@bettis.gov
FU USDOE [DE-AC11-98PN38206]; Division of Materials Sciences and
Engineering; UT-Battelle, LLC [DE-AC-05-00OR22725]
FX This work was supported under USDOE Contract No. DE-AC11-98PN38206.
Thanks to the following ORNL personnel for completing the irradiations,
tensile testing, fractography, and TEM (M.M. Li and J.T. Busby).
Research at the ORNL SHaRE Use Center Was sponsored by the Division of
Materials Sciences and Engineering, US Department of Energy. ORNL is
managed for DOE by UT-Battelle, LLC, under contract DE-AC-05-00OR22725.
NR 74
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U1 1
U2 19
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
EI 1873-4820
J9 J NUCL MATER
JI J. Nucl. Mater.
PD NOV 30
PY 2008
VL 382
IS 1
BP 1
EP 23
DI 10.1016/j.jnucmat.2008.08.052
PG 23
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 380PQ
UT WOS:000261478000001
ER
PT J
AU Dinh, LN
Schildbach, MA
Herberg, JL
Saab, AP
Weigle, JC
Chinn, SC
Maxwell, RS
McLean, W
AF Dinh, L. N.
Schildbach, M. A.
Herberg, J. L.
Saab, A. P.
Weigle, J. C.
Chinn, S. C.
Maxwell, R. S.
McLean, W., II
TI Hydrogen uptake of DPB getter pellets
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
AB The physical and chemical properties of 1,4-diphenylbutadiyne (DPB) blended with carbon-supported I'd (DPB-Pd/C) in the form of pellets during hydrogenation were investigated. A thermogravimetric analyzer (TGA) was employed to measure the kinetics of the hydrogen uptake by the DPB getter pellets. The kinetics obtained were then used to develop a semi-empirical model, based on gas diffusion into solids, to predict the performance of the getter pellets under various conditions. The accuracy of the prediction model was established by comparing the prediction models with independent experimental data on hydrogen pressure buildup in sealed systems containing DPB getter pellets and subjected to known rates of hydrogen input. The volatility of the hydrogenated DPB products and its effects on the hydrogen uptake kinetics were also analyzed. Published by Elsevier B.V.
C1 [Dinh, L. N.; Schildbach, M. A.; Herberg, J. L.; Saab, A. P.; Chinn, S. C.; Maxwell, R. S.; McLean, W., II] Lawrence Livermore Natl Lab, Livermore, CA USA.
[Weigle, J. C.] Los Alamos Natl Lab, Los Alamos, NM USA.
RP Dinh, LN (reprint author), Lawrence Livermore Natl Lab, Livermore, CA USA.
EM dinhl@llnl.gov
RI Chinn, Sarah/E-1195-2011
NR 7
TC 6
Z9 7
U1 1
U2 9
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD NOV 30
PY 2008
VL 382
IS 1
BP 51
EP 63
DI 10.1016/j.jnucmat.2008.09.013
PG 13
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 380PQ
UT WOS:000261478000007
ER
PT J
AU Tarafder, K
Rahaman, M
Paudyal, D
Sanyal, B
Eriksson, O
Mookerjee, A
AF Tarafder, Kartick
Rahaman, Moshiour
Paudyal, Durga
Sanyal, Biplab
Eriksson, Olle
Mookerjee, Abhijit
TI Study of phase stability in a class of binary alloys using augmented
space recursion based orbital peeling technique
SO PHYSICA B-CONDENSED MATTER
LA English
DT Article
DE Phase stability; Recursion; Orbital peeling
ID TRANSITION-METAL ALLOYS; SHORT-RANGE ORDER; ENERGIES; SURFACES; DENSITY;
CLUSTER
AB In this communication we have developed a recursion based approach to the study of phase stability and transition of binary alloys. We have combined the recursion method introduced by Haydock et al. [J. Phys. C: Solid State Phys. 5 (1972) 2845] and the our augmented space approach [A. Mookerjee, J. Phys. C: Solid State Phys. 6 (1973) 1340] with the orbital peeling technique proposed by Burke [Surf. Sci. 58 (1976) 349] to determine the small energy differences involved in the discussion of phase stability. We have studied three alloy systems: one which segregates and the other two orders at lower temperatures. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Mookerjee, Abhijit] SN Bose Natl Ctr Basic Sci, Adv Mat Res Unit, Kolkata 700098, India.
[Rahaman, Moshiour] SN Bose Natl Ctr Basic Sci, Dept Mat Sci, Kolkata 700098, India.
[Tarafder, Kartick; Sanyal, Biplab; Eriksson, Olle; Mookerjee, Abhijit] Uppsala Univ, Dept Phys & Mat Sci, Div Mat Theory, Uppsala 75121, Sweden.
[Paudyal, Durga] Iowa State Univ, US DOE, Ames Lab, Ames, IA USA.
RP Mookerjee, A (reprint author), SN Bose Natl Ctr Basic Sci, Adv Mat Res Unit, Block JD,Sector 3, Kolkata 700098, India.
EM abhijit@bose.res.in
RI Mookerjee, Abhijit /C-8043-2011; Sanyal, Biplab/G-4416-2011; Tarafder,
Kartick /H-5049-2012; Eriksson, Olle/E-3265-2014;
OI Sanyal, Biplab/0000-0002-3687-4223; Eriksson, Olle/0000-0001-5111-1374;
Tarafder, Kartick/0000-0002-6299-654X
FU CSIR, India; Sweden-Asia Research Link
FX KT wishes to thank CSIR, India for financial support. BS, AM and OE
wishes to thank Sweden-Asia Research Link for supporting the project in
which this work was carried out.
NR 36
TC 2
Z9 2
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0921-4526
EI 1873-2135
J9 PHYSICA B
JI Physica B
PD NOV 30
PY 2008
VL 403
IS 21-22
BP 4111
EP 4119
DI 10.1016/j.physb.2008.08.010
PG 9
WC Physics, Condensed Matter
SC Physics
GA 382KV
UT WOS:000261605600049
ER
PT J
AU Meakin, P
Rosso, KM
AF Meakin, Paul
Rosso, Kevin M.
TI Simple kinetic Monte Carlo models for dissolution pitting induced by
crystal defects
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
DE fluctuations; Monte Carlo methods; pipes; point defects; surface
morphology; surface reconstruction
ID X-RAY-DIFFRACTION; MOLECULAR-DYNAMICS; QUARTZ DISSOLUTION; PRESSURE
SOLUTION; DISLOCATION-STRUCTURES; ELECTROLYTE-SOLUTIONS; EWALD
SUMMATION; CARBON-DIOXIDE; ETCH PITS; SIMULATION
AB The solid-on-solid kinetic Monte Carlo model of Lasaga and Blum [Geochim. Cosmochim. Acta 50, 2363 (1986)] for dislocation-controlled etch-pit growth has been extended to the growth of etch pits under the control of multiple dislocations and point defects. This required the development of algorithms that are O(10(3))-O(10(4)) times faster than primitive kinetic Monte Carlo models for surfaces with areas in the range of 1024x1024-4096x4096 lattice sites. Simulations with multiple line defects indicate that the surface morphology coarsens with increasing time and that the coarsening is more pronounced for large bond-breaking activation energies. For small bond breaking activation energies dissolution enhanced by line defects perpendicular to the dissolving surface results in pits with steep sides terminated by deep narrow hollow tubes (nanopipes). Larger bond breaking activation energies lead to shallow pits without deep nanopipes, and if the bond breaking activation energy is large enough, step flow is the primary dissolution mechanism, and pit formation is suppressed. Simplified models that neglect the far field strain energy density but include either a rapidly dissolving core or an initially empty core lead to results that are qualitatively similar to those obtained using models that include the effects of the far field stress and strain. Simulations with a regular array of line defects show that microscopic random thermal fluctuations play an important role in the coarsening process.
C1 [Meakin, Paul] Idaho Natl Lab, Ctr Adv Modeling & Simulat, Idaho Falls, ID 83415 USA.
[Rosso, Kevin M.] Pacific NW Natl Lab, Richland, WA 99354 USA.
RP Meakin, P (reprint author), Idaho Natl Lab, Ctr Adv Modeling & Simulat, POB 1625,Mail Stop 2211, Idaho Falls, ID 83415 USA.
EM kevin.rosso@pnl.gov
FU U. S. Department of Energy, Office of Basic Energy Sciences, Geosciences
Program
FX We would like to than Jens Lothe, Center for the Physics of Geological
Processes at the University of Oslo, for valuable discussions. This work
was made possible by a grant from the U. S. Department of Energy, Office
of Basic Energy Sciences, Geosciences Program. Pacific Northwest
National Laboratory is operated by Battelle for the U. S. Department of
Energy under Contract No. DE-AC06-76RLO 1830.
NR 70
TC 10
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U1 0
U2 24
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 NOV 28
PY 2008
VL 129
IS 20
AR 204106
DI 10.1063/1.3021478
PG 19
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 396QV
UT WOS:000262607100009
PM 19045851
ER
PT J
AU Saraiva-Souza, A
de Souza, FM
Aleixo, VFP
Girao, EC
Mendes, J
Meunier, V
Sumpter, BG
Souza, AG
Del Nero, J
AF Saraiva-Souza, Aldilene
de Souza, Fabricio Macedo
Aleixo, Vicente F. P.
Girao, Eduardo Costa
Mendes Filho, Josue
Meunier, Vincent
Sumpter, Bobby G.
Souza Filho, Antonio Gomes
Del Nero, Jordan
TI A single molecule rectifier with strong push-pull coupling
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
DE ab initio calculations; electric fields; Green's function methods; HF
calculations; molecular electronic states; molecular electronics;
organic compounds; rectification; rectifiers
ID DENSITY-FUNCTIONAL THEORY; COULOMB-BLOCKADE; ELECTRONICS; RECTIFICATION;
TRANSPORT; RULES
AB We theoretically investigate the electronic charge transport in a molecular system composed of a donor group (dinitrobenzene) coupled to an acceptor group (dihydrophenazine) via a polyenic chain (unsaturated carbon bridge). Ab initio calculations based on the Hartree-Fock approximations are performed to investigate the distribution of electron states over the molecule in the presence of an external electric field. For small bridge lengths (n=0-3) we find a homogeneous distribution of the frontier molecular orbitals, while for n>3 a strong localization of the lowest unoccupied molecular orbital is found. The localized orbitals in between the donor and acceptor groups act as conduction channels when an external electric field is applied. We also calculate the rectification behavior of this system by evaluating the charge accumulated in the donor and acceptor groups as a function of the external electric field. Finally, we propose a phenomenological model based on nonequilibrium Green's function to rationalize the ab initio findings.
C1 [Saraiva-Souza, Aldilene; Girao, Eduardo Costa; Mendes Filho, Josue; Souza Filho, Antonio Gomes] Univ Fed Ceara, Dept Fis, BR-60455900 Fortaleza, Ceara, Brazil.
[de Souza, Fabricio Macedo] Univ Brasilia, Ctr Int Fis Mat Condensada, BR-70904910 Brasilia, DF, Brazil.
[Aleixo, Vicente F. P.] Fed Univ Para, BR-66075900 Belem, Para, Brazil.
[Meunier, Vincent; Sumpter, Bobby G.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Del Nero, Jordan] Fed Univ Para, Dept Fis, BR-66075110 Belem, Para, Brazil.
RP Souza, AG (reprint author), Univ Fed Ceara, Dept Fis, BR-60455900 Fortaleza, Ceara, Brazil.
EM agsf@fisica.ufc.br; jordan@ufpa.br
RI Souza, Antonio/D-8978-2011; Girao, Eduardo/C-5620-2012; Meunier,
Vincent/F-9391-2010; Sumpter, Bobby/C-9459-2013; Mendes Filho,
Josue/K-7083-2013; Nanobiosimes, Inct/K-2263-2013; UFC, DF/E-1564-2017;
Universidade Federal do Ceara, Physics Department/J-4630-2016
OI Souza, Antonio/0000-0003-3802-1168; Meunier,
Vincent/0000-0002-7013-179X; Sumpter, Bobby/0000-0001-6341-0355;
Universidade Federal do Ceara, Physics Department/0000-0002-9247-6780
FU CNPq; IBEM; FUNCAP; FAPESPA; Rede Nanotubos de Carbono; Division of
Materials Science and Engineering, U.S. Department of Energy
[DEAC05-00OR22725]; Center for Nanophase Materials Sciences (CNMS)
FX A.S.-S. is grateful to a CNPq fellowship. F. M. S. acknowledges IBEM
agency. A. G. S. F. and J.M.F. acknowledge the FUNCAP and CNPq agencies.
J.D.N. and V. F. P. A. acknowledge the FAPESPA agency. A. G. S. F.,
J.M.F., and J.D.N. acknowledge the Rede Nanotubos de Carbono/CNPq. This
research was supported in part by the Division of Materials Science and
Engineering, U.S. Department of Energy and the Center for Nanophase
Materials Sciences (CNMS), sponsored by the Division of Scientific User
Facilities, U.S. Department of Energy under Contract No.
DEAC05-00OR22725 with UT-Battelle, LLC at Oak Ridge National Laboratory.
NR 30
TC 15
Z9 15
U1 0
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD NOV 28
PY 2008
VL 129
IS 20
AR 204701
DI 10.1063/1.3020353
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 396QV
UT WOS:000262607100031
PM 19045873
ER
PT J
AU Song, YL
Zhao, K
Jia, Y
Hu, X
Zhang, ZY
AF Song, Youlin
Zhao, Ke
Jia, Yu
Hu, Xing
Zhang, Zhenyu
TI Finite size effects on the electromagnetic field enhancement from
low-dimensional silver nanoshell dimer arrays
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
DE electromagnetic wave scattering; nanostructured materials; silver;
surface enhanced Raman scattering
ID RAMAN-SCATTERING; NANOPARTICLE PAIRS; PLASMON RESONANCE; SPECTROSCOPY;
MOLECULES; SPECTRA; NANOSTRUCTURES; JUNCTIONS
AB Finite size effects on the optical properties of one-dimensional (1D) and two-dimensional (2D) nanoshell dimer arrays are investigated using generalized Mie theory and coupled dipole approximation within the context of surface-enhanced Raman spectroscopy (SERS). It is shown that the huge enhancement in the electromagnetic (EM) field at the center of a given dimer oscillates with the length of the 1D array. For an array of fixed length, the EM enhancement also oscillates along the array, but with a different period. Both types of oscillations can be attributed to the interference of the dynamic dipole fields from different dimers in the array. When generalized to 2D arrays, EM enhancement higher than that of the 1D arrays can be gained with a constant magnitude, a salient feature advantageous to experimental realization of single-molecule SERS.
C1 [Song, Youlin; Jia, Yu; Hu, Xing] Zhengzhou Univ, Sch Phys & Engn, Zhengzhou 450052, Peoples R China.
[Song, Youlin; Zhao, Ke; Zhang, Zhenyu] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Song, Youlin] Henan Inst Educ, Dept Phys, Zhengzhou 450014, Peoples R China.
[Zhao, Ke; Zhang, Zhenyu] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Song, YL (reprint author), Zhengzhou Univ, Sch Phys & Engn, Zhengzhou 450052, Peoples R China.
FU U.S. NSF [DMR-0606485]; U.S. DOE [DEFG0205ER46209]
FX We are grateful to Dr. Hongxing Xu for beneficial discussions. This work
was supported in part by U.S. NSF (Grant No. DMR-0606485) and U.S. DOE
(Grant No. DEFG0205ER46209, and the Division of Materials Sciences and
Engineering, Office of Basic Energy Sciences).
NR 29
TC 2
Z9 2
U1 1
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD NOV 28
PY 2008
VL 129
IS 20
AR 204506
DI 10.1063/1.3009293
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 396QV
UT WOS:000262607100030
PM 19045872
ER
PT J
AU Whitelam, S
Pronk, S
Geissler, PL
AF Whitelam, Stephen
Pronk, Sander
Geissler, Phillip L.
TI Stretching chimeric DNA: A test for the putative S-form
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
DE DNA; molecular biophysics; statistical mechanics
ID MOLECULAR-DYNAMICS SIMULATION; DOUBLE-STRANDED DNA; SINGLE DNA; PHASE
TRANSITION; ENTROPY; CRYSTALLIZATION; THERMODYNAMICS; MECHANICS;
TWEEZERS; TENSION
AB Double-stranded DNA "overstretches" at a pulling force of about 65 pN, increasing in length by a factor of 1.7. The nature of the overstretched state is unknown, despite its considerable importance for DNA's biological function and technological application. Overstretching is thought by some to be a force-induced denaturation and by others to consist of a transition to an elongated, hybridized state called S-DNA. Within a statistical mechanical model, we consider the effect upon overstretching of extreme sequence heterogeneity. "Chimeric" sequences possessing halves of markedly different AT composition elongate under fixed external conditions via distinct, spatially segregated transitions. The corresponding force-extension data vary with pulling rate in a manner that depends qualitatively and strikingly upon whether the hybridized S-form is accessible. This observation implies a test for S-DNA that could be performed in experiment.
C1 [Whitelam, Stephen] Univ Warwick, Syst Biol Ctr, Coventry CV4 7AL, W Midlands, England.
[Whitelam, Stephen; Pronk, Sander; Geissler, Phillip L.] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Whitelam, Stephen; Pronk, Sander; Geissler, Phillip L.] Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
[Whitelam, Stephen; Pronk, Sander; Geissler, Phillip L.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
RP Whitelam, S (reprint author), Lawrence Berkeley Natl Lab, Phys Biosci Div, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM swhitelam@lbl.gov
FU BioSim European Union Network of Excellence [LSHB-CT2004-005137];
California Institute for Quantitative Biosciences; NSF; Materials
Sciences Division of Lawrence Berkeley National Laboratory (DOE)
[DE-AC0205CH11231]; Science Research Investment Fund
FX We thank J. Ricardo Arias-Gonzalez for discussions. S. W. was supported
initially by the DOE, and subsequently by BioSim European Union Network
of Excellence (LSHB-CT2004-005137). S. P. was supported by the
California Institute for Quantitative Biosciences and the NSF. P. L. G.
acknowledges support from the Biomolecular Materials Program
administered by the Materials Sciences Division of Lawrence Berkeley
National Laboratory (DOE Grant No. DE-AC0205CH11231). S. W. acknowledges
a Royal Society conference grant that made possible a collaborative
visit. Computing facilities were provided in part by the Centre for
Scientific Computing at the University of Warwick with support from the
Science Research Investment Fund.
NR 38
TC 13
Z9 13
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 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD NOV 28
PY 2008
VL 129
IS 20
AR 205101
DI 10.1063/1.3009266
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 396QV
UT WOS:000262607100037
PM 19045879
ER
PT J
AU Gritti, F
Guiochon, G
AF Gritti, Fabrice
Guiochon, Georges
TI Exact peak compression factor in linear gradient elution I. Theory
SO JOURNAL OF CHROMATOGRAPHY A
LA English
DT Article
DE Linear gradient elution chromatography; Peak compression factor; Liquid
chromatography; First and second spatial moments; Thermodynamic band
compression; Kinetic band dispersion
ID CHROMATOGRAPHY
AB The only existing expression for the peak compression factor in linear gradient elution chromatography assumes that the linear-solvent-strength model (LSSM) applies to the retention of the compound studied, that the column efficiency is independent of the mobile phase composition, and that, during gradient elution, the relative retention factor of a compound inside its band varies linearly with the distance from the band center. Because the retention factors of many analytes in reversed-phase liquid chromatography do not rigorously follow the LSSM, we extend the theoretical approach of Poppe et al. to the prediction of peak compression factors in linear gradient elution chromatography for any retention model, when column efficiency varies with the mobile phase composition. Only the contribution of the chromatographic column to the peak compression was taken into account, the contribution of the dwell volume being neglected. A second restriction is the linearity of the relative retention factor as a function of the position along the band width inside the column. These constraints could be the sources for the difference observed between experimental and theoretical values of peak compression factors. When the retention factor varies steeply with the mobile phase composition, such as with proteins or large peptides in RP-HPLC, it is found that the thermodynamic compression term. which tends to sharpen the peak, is coupled with the column dispersion term, which tends to broaden the peak. This coupling term acts as an apparent dispersion term. contributing to broaden the peak. This result is consistent with the measurements of peak compression factors found in the literature. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Gritti, Fabrice; Guiochon, Georges] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
[Gritti, Fabrice; Guiochon, Georges] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Guiochon, G (reprint author), Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
EM guiochon@utk.edu
FU National Science Foundation [CHE-06-08659]
FX This work was supported in part by grant CHE-06-08659 of the National
Science Foundation and by the cooperative agreement between the
University of Tennessee and the Oak Ridge National Laboratory.
NR 11
TC 36
Z9 37
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0021-9673
J9 J CHROMATOGR A
JI J. Chromatogr. A
PD NOV 28
PY 2008
VL 1212
IS 1-2
BP 35
EP 40
DI 10.1016/j.chroma.2008.09.113
PG 6
WC Biochemical Research Methods; Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA 377TF
UT WOS:000261272800005
PM 18951548
ER
PT J
AU Abazov, VM
Abbott, B
Abolins, M
Acharya, BS
Adams, M
Adams, T
Aguilo, E
Ahn, SH
Ahsan, M
Alexeev, GD
Alkhazov, G
Alton, A
Alverson, G
Alves, GA
Anastasoaie, M
Ancu, LS
Andeen, T
Anderson, S
Andrieu, B
Anzelc, MS
Aoki, M
Arnoud, Y
Arov, M
Arthaud, M
Askew, A
ASman, B
Jesus, ACSA
Atramentov, O
Avila, C
Badaud, F
Baden, A
Bagby, L
Baldin, B
Bandurin, DV
Banerjee, P
Banerjee, S
Barberis, E
Barfuss, AF
Bargassa, P
Baringer, P
Barreto, J
Bartlett, JF
Bassler, U
Bauer, D
Beale, S
Bean, A
Begalli, M
Begel, M
Belanger-Champagne, C
Bellantoni, L
Bellavance, A
Benitez, JA
Beri, SB
Bernardi, G
Bernhard, R
Bertram, I
Besancon, M
Beuselinck, R
Bezzubov, VA
Bhat, PC
Bhatnagar, V
Biscarat, C
Blazey, G
Blekman, F
Blessing, S
Bloch, D
Bloom, K
Boehnlein, A
Boline, D
Bolton, TA
Boos, EE
Borissov, G
Bose, T
Brandt, A
Brock, R
Brooijmans, G
Bross, A
Brown, D
Buchanan, NJ
Buchholz, D
Buehler, M
Buescher, V
Bunichev, V
Burdin, S
Burke, S
Burnett, TH
Buszello, CP
Butler, JM
Calfayan, P
Calvet, S
Cammin, J
Carvalho, W
Casey, BCK
Castilla-Valdez, H
Chakrabarti, S
Chakraborty, D
Chan, K
Chan, KM
Chandra, A
Charles, F
Cheu, E
Chevallier, F
Cho, DK
Choi, S
Choudhary, B
Christofek, L
Christoudias, T
Cihangir, S
Claes, D
Clutter, J
Cooke, M
Cooper, WE
Corcoran, M
Couderc, F
Cousinou, MC
Crepe-Renaudin, S
Cutts, D
Cwiok, M
da Motta, H
Das, A
Davies, G
De, K
de Jong, SJ
De La Cruz-Burelo, E
De Oliveira Martins, C
Degenhardt, JD
Deliot, F
Demarteau, M
Demina, R
Denisov, D
Denisov, SP
Desai, S
Diehl, HT
Diesburg, M
Dominguez, A
Dong, H
Dudko, LV
Duflot, L
Dugad, SR
Duggan, D
Duperrin, A
Dyer, J
Dyshkant, A
Eads, M
Edmunds, D
Ellison, J
Elvira, VD
Enari, Y
Eno, S
Ermolov, P
Evans, H
Evdokimov, A
Evdokimov, VN
Ferapontov, AV
Ferbel, T
Fiedler, F
Filthaut, F
Fisher, W
Fisk, HE
Fortner, M
Fox, H
Fu, S
Fuess, S
Gadfort, T
Galea, CF
Gallas, E
Garcia, C
Garcia-Bellido, A
Gavrilov, V
Gay, P
Geist, W
Gele, D
Gerber, CE
Gershtein, Y
Gillberg, D
Ginther, G
Gollub, N
Gomez, B
Goussiou, A
Grannis, PD
Greenlee, H
Greenwood, ZD
Gregores, EM
Grenier, G
Gris, P
Grivaz, JF
Grohsjean, A
Grunendahl, S
Grunewald, MW
Guo, F
Guo, J
Gutierrez, G
Gutierrez, P
Haas, A
Hadley, NJ
Haefner, P
Hagopian, S
Haley, J
Hall, I
Hall, RE
Han, L
Harder, K
Harel, A
Hauptman, JM
Hauser, R
Hays, J
Hebbeker, T
Hedin, D
Hegeman, JG
Heinson, AP
Heintz, U
Hensel, C
Herner, K
Hesketh, G
Hildreth, MD
Hirosky, R
Hobbs, JD
Hoeneisen, B
Hoeth, H
Hohlfeld, M
Hong, SJ
Hossain, S
Houben, P
Hu, Y
Hubacek, Z
Hynek, V
Iashvili, I
Illingworth, R
Ito, AS
Jabeen, S
Jaffre, M
Jain, S
Jakobs, K
Jarvis, C
Jesik, R
Johns, K
Johnson, C
Johnson, M
Jonckheere, A
Jonsson, P
Juste, A
Kajfasz, E
Kalk, JM
Karmanov, D
Kasper, PA
Katsanos, I
Kau, D
Kaushik, V
Kehoe, R
Kermiche, S
Khalatyan, N
Khanov, A
Kharchilava, A
Kharzheev, YM
Khatidze, D
Kim, TJ
Kirby, MH
Kirsch, M
Klima, B
Kohli, JM
Konrath, JP
Kozelov, AV
Kraus, J
Krop, D
Kuhl, T
Kumar, A
Kupco, A
Kurca, T
Kuzmin, VA
Kvita, J
Lacroix, F
Lam, D
Lammers, S
Landsberg, G
Lebrun, P
Lee, WM
Leflat, A
Lellouch, J
Leveque, J
Li, J
Li, L
Li, QZ
Lietti, SM
Lima, JGR
Lincoln, D
Linnemann, J
Lipaev, VV
Lipton, R
Liu, Y
Liu, Z
Lobodenko, A
Lokajicek, M
Love, P
Lubatti, HJ
Luna, R
Lyon, AL
Maciel, AKA
Mackin, D
Madaras, RJ
Mattig, P
Magass, C
Magerkurth, A
Mal, PK
Malbouisson, HB
Malik, S
Malyshev, VL
Mao, HS
Maravin, Y
Martin, B
McCarthy, R
Melnitchouk, A
Mendoza, L
Mercadante, PG
Merkin, M
Merritt, KW
Meyer, A
Meyer, J
Millet, T
Mitrevski, J
Mommsen, RK
Mondal, NK
Moore, RW
Moulik, T
Muanza, GS
Mulhearn, M
Mundal, O
Mundim, L
Nagy, E
Naimuddin, M
Narain, M
Naumann, NA
Neal, HA
Negret, JP
Neustroev, P
Nilsen, H
Nogima, H
Novaes, SF
Nunnemann, T
O'Dell, V
O'Neil, DC
Obrant, G
Ochando, C
Onoprienko, D
Oshima, N
Osman, N
Osta, J
Otec, R
Garzon, GJOY
Owen, M
Padley, P
Pangilinan, M
Parashar, N
Park, SJ
Park, SK
Parsons, J
Partridge, R
Parua, N
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Pawloski, G
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Sanders, MP
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Santoro, A
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Scheglov, Y
Schellman, H
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AF Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
Adams, T.
Aguilo, E.
Ahn, S. H.
Ahsan, M.
Alexeev, G. D.
Alkhazov, G.
Alton, A.
Alverson, G.
Alves, G. A.
Anastasoaie, M.
Ancu, L. S.
Andeen, T.
Anderson, S.
Andrieu, B.
Anzelc, M. S.
Aoki, M.
Arnoud, Y.
Arov, M.
Arthaud, M.
Askew, A.
Asman, B.
Jesus, A. C. S. Assis
Atramentov, O.
Avila, C.
Badaud, F.
Baden, A.
Bagby, L.
Baldin, B.
Bandurin, D. V.
Banerjee, P.
Banerjee, S.
Barberis, E.
Barfuss, A. -F.
Bargassa, P.
Baringer, P.
Barreto, J.
Bartlett, J. F.
Bassler, U.
Bauer, D.
Beale, S.
Bean, A.
Begalli, M.
Begel, M.
Belanger-Champagne, C.
Bellantoni, L.
Bellavance, A.
Benitez, J. A.
Beri, S. B.
Bernardi, G.
Bernhard, R.
Bertram, I.
Besancon, M.
Beuselinck, R.
Bezzubov, V. A.
Bhat, P. C.
Bhatnagar, V.
Biscarat, C.
Blazey, G.
Blekman, F.
Blessing, S.
Bloch, D.
Bloom, K.
Boehnlein, A.
Boline, D.
Bolton, T. A.
Boos, E. E.
Borissov, G.
Bose, T.
Brandt, A.
Brock, R.
Brooijmans, G.
Bross, A.
Brown, D.
Buchanan, N. J.
Buchholz, D.
Buehler, M.
Buescher, V.
Bunichev, V.
Burdin, S.
Burke, S.
Burnett, T. H.
Buszello, C. P.
Butler, J. M.
Calfayan, P.
Calvet, S.
Cammin, J.
Carvalho, W.
Casey, B. C. K.
Castilla-Valdez, H.
Chakrabarti, S.
Chakraborty, D.
Chan, K.
Chan, K. M.
Chandra, A.
Charles, F.
Cheu, E.
Chevallier, F.
Cho, D. K.
Choi, S.
Choudhary, B.
Christofek, L.
Christoudias, T.
Cihangir, S.
Claes, D.
Clutter, J.
Cooke, M.
Cooper, W. E.
Corcoran, M.
Couderc, F.
Cousinou, M. -C.
Crepe-Renaudin, S.
Cutts, D.
Cwiok, M.
da Motta, H.
Das, A.
Davies, G.
De, K.
de Jong, S. J.
De La Cruz-Burelo, E.
De Oliveira Martins, C.
Degenhardt, J. D.
Deliot, F.
Demarteau, M.
Demina, R.
Denisov, D.
Denisov, S. P.
Desai, S.
Diehl, H. T.
Diesburg, M.
Dominguez, A.
Dong, H.
Dudko, L. V.
Duflot, L.
Dugad, S. R.
Duggan, D.
Duperrin, A.
Dyer, J.
Dyshkant, A.
Eads, M.
Edmunds, D.
Ellison, J.
Elvira, V. D.
Enari, Y.
Eno, S.
Ermolov, P.
Evans, H.
Evdokimov, A.
Evdokimov, V. N.
Ferapontov, A. V.
Ferbel, T.
Fiedler, F.
Filthaut, F.
Fisher, W.
Fisk, H. E.
Fortner, M.
Fox, H.
Fu, S.
Fuess, S.
Gadfort, T.
Galea, C. F.
Gallas, E.
Garcia, C.
Garcia-Bellido, A.
Gavrilov, V.
Gay, P.
Geist, W.
Gele, D.
Gerber, C. E.
Gershtein, Y.
Gillberg, D.
Ginther, G.
Gollub, N.
Gomez, B.
Goussiou, A.
Grannis, P. D.
Greenlee, H.
Greenwood, Z. D.
Gregores, E. M.
Grenier, G.
Gris, Ph.
Grivaz, J. -F.
Grohsjean, A.
Gruenendahl, S.
Gruenewald, M. W.
Guo, F.
Guo, J.
Gutierrez, G.
Gutierrez, P.
Haas, A.
Hadley, N. J.
Haefner, P.
Hagopian, S.
Haley, J.
Hall, I.
Hall, R. E.
Han, L.
Harder, K.
Harel, A.
Hauptman, J. M.
Hauser, R.
Hays, J.
Hebbeker, T.
Hedin, D.
Hegeman, J. G.
Heinson, A. P.
Heintz, U.
Hensel, C.
Herner, K.
Hesketh, G.
Hildreth, M. D.
Hirosky, R.
Hobbs, J. D.
Hoeneisen, B.
Hoeth, H.
Hohlfeld, M.
Hong, S. J.
Hossain, S.
Houben, P.
Hu, Y.
Hubacek, Z.
Hynek, V.
Iashvili, I.
Illingworth, R.
Ito, A. S.
Jabeen, S.
Jaffre, M.
Jain, S.
Jakobs, K.
Jarvis, C.
Jesik, R.
Johns, K.
Johnson, C.
Johnson, M.
Jonckheere, A.
Jonsson, P.
Juste, A.
Kajfasz, E.
Kalk, J. M.
Karmanov, D.
Kasper, P. A.
Katsanos, I.
Kau, D.
Kaushik, V.
Kehoe, R.
Kermiche, S.
Khalatyan, N.
Khanov, A.
Kharchilava, A.
Kharzheev, Y. M.
Khatidze, D.
Kim, T. J.
Kirby, M. H.
Kirsch, M.
Klima, B.
Kohli, J. M.
Konrath, J. -P.
Kozelov, A. V.
Kraus, J.
Krop, D.
Kuhl, T.
Kumar, A.
Kupco, A.
Kurca, T.
Kuzmin, V. A.
Kvita, J.
Lacroix, F.
Lam, D.
Lammers, S.
Landsberg, G.
Lebrun, P.
Lee, W. M.
Leflat, A.
Lellouch, J.
Leveque, J.
Li, J.
Li, L.
Li, Q. Z.
Lietti, S. M.
Lima, J. G. R.
Lincoln, D.
Linnemann, J.
Lipaev, V. V.
Lipton, R.
Liu, Y.
Liu, Z.
Lobodenko, A.
Lokajicek, M.
Love, P.
Lubatti, H. J.
Luna, R.
Lyon, A. L.
Maciel, A. K. A.
Mackin, D.
Madaras, R. J.
Maettig, P.
Magass, C.
Magerkurth, A.
Mal, P. K.
Malbouisson, H. B.
Malik, S.
Malyshev, V. L.
Mao, H. S.
Maravin, Y.
Martin, B.
McCarthy, R.
Melnitchouk, A.
Mendoza, L.
Mercadante, P. G.
Merkin, M.
Merritt, K. W.
Meyer, A.
Meyer, J.
Millet, T.
Mitrevski, J.
Mommsen, R. K.
Mondal, N. K.
Moore, R. W.
Moulik, T.
Muanza, G. S.
Mulhearn, M.
Mundal, O.
Mundim, L.
Nagy, E.
Naimuddin, M.
Narain, M.
Naumann, N. A.
Neal, H. A.
Negret, J. P.
Neustroev, P.
Nilsen, H.
Nogima, H.
Novaes, S. F.
Nunnemann, T.
O'Dell, V.
O'Neil, D. C.
Obrant, G.
Ochando, C.
Onoprienko, D.
Oshima, N.
Osman, N.
Osta, J.
Otec, R.
Otero y Garzon, G. J.
Owen, M.
Padley, P.
Pangilinan, M.
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Yasuda, T.
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Yip, K.
Yoo, H. D.
Youn, S. W.
Yu, J.
Zeitnitz, C.
Zhao, T.
Zhou, B.
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Zieminski, A.
Zivkovic, L.
Zutshi, V.
Zverev, E. G.
TI Search for Neutral Higgs Bosons in Multi-b-Jet Events in pp Collisions
at s=1.96 TeV
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID MSSM; SUPERSYMMETRY; PHYSICS; MASSES; LEVEL
AB Data recorded by the D0 experiment at the Fermilab Tevatron Collider are analyzed to search for neutral Higgs bosons produced in association with b quarks. This production mode can be enhanced in the minimal supersymmetric standard model (MSSM). The search is performed in the three b quark channel using multijet triggered events corresponding to an integrated luminosity of 1 fb(-1). No statistically significant excess of events with respect to the predicted background is observed and limits are set in the MSSM parameter space.
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RP Abazov, VM (reprint author), Joint Inst Nucl Res, Dubna, Russia.
RI Ancu, Lucian Stefan/F-1812-2010; Alves, Gilvan/C-4007-2013; Santoro,
Alberto/E-7932-2014; Deliot, Frederic/F-3321-2014; Sharyy,
Viatcheslav/F-9057-2014; Kupco, Alexander/G-9713-2014; Christoudias,
Theodoros/E-7305-2015; KIM, Tae Jeong/P-7848-2015; Guo, Jun/O-5202-2015;
Sznajder, Andre/L-1621-2016; Li, Liang/O-1107-2015; Mundim,
Luiz/A-1291-2012; Boos, Eduard/D-9748-2012; Novaes, Sergio/D-3532-2012;
Merkin, Mikhail/D-6809-2012; Leflat, Alexander/D-7284-2012; Dudko,
Lev/D-7127-2012; Perfilov, Maxim/E-1064-2012; Shivpuri, R K/A-5848-2010;
Gutierrez, Phillip/C-1161-2011; Mercadante, Pedro/K-1918-2012; Yip,
Kin/D-6860-2013; De, Kaushik/N-1953-2013; Fisher, Wade/N-4491-2013
OI Belanger-Champagne, Camille/0000-0003-2368-2617; Ancu, Lucian
Stefan/0000-0001-5068-6723; Sharyy, Viatcheslav/0000-0002-7161-2616;
Christoudias, Theodoros/0000-0001-9050-3880; KIM, Tae
Jeong/0000-0001-8336-2434; Guo, Jun/0000-0001-8125-9433; Sznajder,
Andre/0000-0001-6998-1108; Li, Liang/0000-0001-6411-6107; Mundim,
Luiz/0000-0001-9964-7805; Novaes, Sergio/0000-0003-0471-8549; Dudko,
Lev/0000-0002-4462-3192; Yip, Kin/0000-0002-8576-4311; De,
Kaushik/0000-0002-5647-4489;
FU DOE and NSF (USA); CEA and CNRS/IN2P3 (France); FASI, Rosatom and RFBR
(Russia); CNPq, FAPERJ, FAPESP and FUNDUNESP (Brazil); DAE and DST
(India); Colciencias (Colombia); CONACyT (Mexico); KRF and KOSEF
(Korea); CONICET and UBACyT (Argentina); FOM (The Netherlands); STFC
(United Kingdom); MSMT and GACR (Czech Republic); CRC Program, CFI,
NSERC and WestGrid Project (Canada); BMBF and DFG (Germany); SFI
(Ireland); The Swedish Research Council (Sweden); CAS and CNSF (China);
Alexander von Humboldt Foundation
FX We thank the staffs at Fermilab and collaborating institutions, and
acknowledge support from the DOE and NSF (USA); CEA and CNRS/IN2P3
(France); FASI, Rosatom and RFBR (Russia); CNPq, FAPERJ, FAPESP and
FUNDUNESP (Brazil); DAE and DST (India); Colciencias (Colombia); CONACyT
(Mexico); KRF and KOSEF (Korea); CONICET and UBACyT (Argentina); FOM
(The Netherlands); STFC (United Kingdom); MSMT and GACR (Czech
Republic); CRC Program, CFI, NSERC and WestGrid Project (Canada); BMBF
and DFG (Germany); SFI (Ireland); The Swedish Research Council (Sweden);
CAS and CNSF (China); and the Alexander von Humboldt Foundation.
NR 24
TC 13
Z9 13
U1 1
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 NOV 28
PY 2008
VL 101
IS 22
AR 221802
DI 10.1103/PhysRevLett.101.221802
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 376WT
UT WOS:000261214400013
PM 19113475
ER
PT J
AU Abazov, VM
Abbott, B
Abolins, M
Acharya, BS
Adams, M
Adams, T
Aguilo, E
Ahsan, M
Alexeev, GD
Alkhazov, G
Alton, A
Alverson, G
Alves, GA
Anastasoaie, M
Ancu, LS
Andeen, T
Andrieu, B
Anzelc, MS
Aoki, M
Arnoud, Y
Arov, M
Arthaud, M
Askew, A
Asman, B
Jesus, ACSA
Atramentov, O
Avila, C
Badaud, F
Bagby, L
Baldin, B
Bandurin, DV
Banerjee, P
Banerjee, S
Barberis, E
Barfuss, AF
Bargassa, P
Baringer, P
Barreto, J
Bartlett, JF
Bassler, U
Bauer, D
Beale, S
Bean, A
Begalli, M
Begel, M
Belanger-Champagne, C
Bellantoni, L
Bellavance, A
Benitez, JA
Beri, SB
Bernardi, G
Bernhard, R
Bertram, I
BesanOon, M
Beuselinck, R
Bezzubov, VA
Bhat, PC
Bhatnagar, V
Biscarat, C
Blazey, G
Blekman, F
Blessing, S
Bloch, D
Bloom, K
Boehnlein, A
Boline, D
Bolton, TA
Boos, EE
Borissov, G
Bose, T
Brandt, A
Brock, R
Brooijmans, G
Bross, A
Brown, D
Bu, XB
Buchanan, NJ
Buchholz, D
Buehler, M
Buescher, V
Bunichev, V
Burdin, S
Burnett, TH
Buszello, CP
Butler, JM
Calfayan, P
Calvet, S
Cammin, J
Carrera, E
Carvalho, W
Casey, BCK
Castilla-Valdez, H
Chakrabarti, S
Chakraborty, D
Chan, KM
Chandra, A
Cheu, E
Chevallier, F
Cho, DK
Choi, S
Choudhary, B
Christofek, L
Christoudias, T
Cihangir, S
Claes, D
Clutter, J
Cooke, M
Cooper, WE
Corcoran, M
Couderc, F
Cousinou, MC
Crepe-Renaudin, S
Cuplov, V
Cutts, D
Cwiok, M
Motta, H
Das, A
Davies, G
De, K
de Jong, SJ
De La Cruz-Burelo, E
Martins, CD
Degenhardt, JD
Deliot, F
Demarteau, M
Demina, R
Denisov, D
Denisov, SP
Desai, S
Diehl, HT
Diesburg, M
Dominguez, A
Dong, H
Dorland, T
Dubey, A
Dudko, LV
Duflot, L
Dugad, SR
Duggan, D
Duperrin, A
Dyer, J
Dyshkant, A
Eads, M
Edmunds, D
Ellison, J
Elvira, VD
Enari, Y
Eno, S
Ermolov, P
Evans, H
Evdokimov, A
Evdokimov, VN
Ferapontov, AV
Ferbel, T
Fiedler, F
Filthaut, F
Fisher, W
Fisk, HE
Fortner, M
Fox, H
Fu, S
Fuess, S
Gadfort, T
Galea, CF
Garcia, C
Garcia-Bellido, A
Gavrilov, V
Gay, P
Geist, W
Gele, D
Geng, W
Gerber, CE
Gershtein, Y
Gillberg, D
Ginther, G
Gollub, N
Gomez, B
Goussiou, A
Grannis, PD
Greenlee, H
Greenwood, ZD
Gregores, EM
Grenier, G
Gris, P
Grivaz, JF
Grohsjean, A
Grunendahl, S
Grunewald, MW
Guo, F
Guo, J
Gutierrez, G
Gutierrez, P
Haas, A
Hadley, NJ
Haefner, P
Hagopian, S
Haley, J
Hall, I
Hall, RE
Han, L
Harder, K
Harel, A
Hauptman, JM
Hauser, R
Hays, J
Hebbeker, T
Hedin, D
Hegeman, JG
Heinson, AP
Heintz, U
Hensel, C
Herner, K
Hesketh, G
Hildreth, MD
Hirosky, R
Hobbs, JD
Hoeneisen, B
Hoeth, H
Hohlfeld, M
Hossain, S
Houben, P
Hu, Y
Hubacek, Z
Hynek, V
Iashvili, I
Illingworth, R
Ito, AS
Jabeen, S
Jaffre, M
Jain, S
Jakobs, K
Jarvis, C
Jesik, R
Johns, K
Johnson, C
Johnson, M
Jonckheere, A
Jonsson, P
Juste, A
Kajfasz, E
Kalk, JM
Karmanov, D
Kasper, PA
Katsanos, I
Kau, D
Kaushik, V
Kehoe, R
Kermiche, S
Khalatyan, N
Khanov, A
Kharchilava, A
Kharzheev, YM
Khatidze, D
Kim, TJ
Kirby, MH
Kirsch, M
Klima, B
Kohli, JM
Konrath, JP
Kozelov, AV
Kraus, J
Kuhl, T
Kumar, A
Kupco, A
Kurca, T
Kuzmin, VA
Kvita, J
Lacroix, F
Lam, D
Lammers, S
Landsberg, G
Lebrun, P
Lee, WM
Leflat, A
Lellouch, J
Li, J
Li, L
Li, QZ
Lietti, SM
Lim, JK
Lima, JGR
Lincoln, D
Linnemann, J
Lipaev, VV
Lipton, R
Liu, Y
Liu, Z
Lobodenko, A
Lokajicek, M
Love, P
Lubatti, HJ
Luna, R
Lyon, AL
Maciel, AKA
Mackin, D
Madaras, RJ
Mattig, P
Magass, C
Magerkurth, A
Mal, PK
Malbouisson, HB
Malik, S
Malyshev, VL
Mao, HS
Maravin, Y
Martin, B
McCarthy, R
Melnitchouk, A
Mendoza, L
Mercadante, PG
Merkin, M
Merritt, KW
Meyer, A
Meyer, J
Millet, T
Mitrevski, J
Mommsen, RK
Mondal, NK
Moore, RW
Moulik, T
Muanza, GS
Mulhearn, M
Mundal, O
Mundim, L
Nagy, E
Naimuddin, M
Narain, M
Naumann, NA
Neal, HA
Negret, JP
Neustroev, P
Nilsen, H
Nogima, H
Novaes, SF
Nunnemann, T
O'Dell, V
O'Neil, DC
Obrant, G
Ochando, C
Onoprienko, D
Oshima, N
Osman, N
Osta, J
Otec, R
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Owen, M
Padley, P
Pangilinan, M
Parashar, N
Park, SJ
Park, SK
Parsons, J
Partridge, R
Parua, N
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Pawloski, G
Penning, B
Perfilov, M
Peters, K
Peters, Y
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Petteni, M
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Piper, J
Pleier, MA
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da Silva, WLP
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Quinn, B
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Rangel, MS
Ranjan, K
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Renkel, P
Reucroft, S
Rich, P
Rieger, J
Rijssenbeek, M
Ripp-Baudot, I
Rizatdinova, F
Robinson, S
Rodrigues, RF
Rominsky, M
Royon, C
Rubinov, P
Ruchti, R
Safronov, G
Sajot, G
Sanchez-Hernandez, A
Sanders, MP
Sanghi, B
Savage, G
Sawyer, L
Scanlon, T
Schaile, D
Schamberger, RD
Scheglov, Y
Schellman, H
Schliephake, T
Schlobohm, S
Schwanenberger, C
Schwartzman, A
Schwienhorst, R
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Shamim, M
Shary, V
Shchukin, AA
Shivpuri, RK
Siccardi, V
Simak, V
Sirotenko, V
Skubic, P
Slattery, P
Smirnov, D
Snow, GR
Snow, J
Snyder, S
Soldner-Rembold, S
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Sopczak, A
Sosebee, M
Soustruznik, K
Spurlock, B
Stark, J
Steele, J
Stolin, V
Stoyanova, DA
Strandberg, J
Strandberg, S
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Strauss, E
Strauss, M
Strohmer, R
Strom, D
Stutte, L
Sumowidagdo, S
Svoisky, P
Sznajder, A
Tamburello, P
Tanasijczuk, A
Taylor, W
Tiller, B
Tissandier, F
Titov, M
Tokmenin, VV
Torchiani, I
Tsybychev, D
Tuchming, B
Tully, C
Tuts, PM
Unalan, R
Uvarov, L
Uvarov, S
Uzunyan, S
Vachon, B
van den Berg, PJ
Van Kooten, R
van Leeuwen, WM
Varelas, N
Varnes, EW
Vasilyev, IA
Vaupel, M
Verdier, P
Vertogradov, LS
Verzocchi, M
Vilanova, D
Villeneuve-Seguier, F
Vint, P
Vokac, P
Von Toerne, E
Voutilainen, M
Wagner, R
Wahl, HD
Wang, L
Wang, MHLS
Warchol, J
Watts, G
Wayne, M
Weber, G
Weber, M
Welty-Rieger, L
Wenger, A
Wermes, N
Wetstein, M
White, A
Wicke, D
Wilson, GW
Wimpenny, SJ
Wobisch, M
Wood, DR
Wyatt, TR
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Garcia, C.
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Gavrilov, V.
Gay, P.
Geist, W.
Gele, D.
Geng, W.
Gerber, C. E.
Gershtein, Y.
Gillberg, D.
Ginther, G.
Gollub, N.
Gomez, B.
Goussiou, A.
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Haefner, P.
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Haley, J.
Hall, I.
Hall, R. E.
Han, L.
Harder, K.
Harel, A.
Hauptman, J. M.
Hauser, R.
Hays, J.
Hebbeker, T.
Hedin, D.
Hegeman, J. G.
Heinson, A. P.
Heintz, U.
Hensel, C.
Herner, K.
Hesketh, G.
Hildreth, M. D.
Hirosky, R.
Hobbs, J. D.
Hoeneisen, B.
Hoeth, H.
Hohlfeld, M.
Hossain, S.
Houben, P.
Hu, Y.
Hubacek, Z.
Hynek, V.
Iashvili, I.
Illingworth, R.
Ito, A. S.
Jabeen, S.
Jaffre, M.
Jain, S.
Jakobs, K.
Jarvis, C.
Jesik, R.
Johns, K.
Johnson, C.
Johnson, M.
Jonckheere, A.
Jonsson, P.
Juste, A.
Kajfasz, E.
Kalk, J. M.
Karmanov, D.
Kasper, P. A.
Katsanos, I.
Kau, D.
Kaushik, V.
Kehoe, R.
Kermiche, S.
Khalatyan, N.
Khanov, A.
Kharchilava, A.
Kharzheev, Y. M.
Khatidze, D.
Kim, T. J.
Kirby, M. H.
Kirsch, M.
Klima, B.
Kohli, J. M.
Konrath, J. -P.
Kozelov, A. V.
Kraus, J.
Kuhl, T.
Kumar, A.
Kupco, A.
Kurca, T.
Kuzmin, V. A.
Kvita, J.
Lacroix, F.
Lam, D.
Lammers, S.
Landsberg, G.
Lebrun, P.
Lee, W. M.
Leflat, A.
Lellouch, J.
Li, J.
Li, L.
Li, Q. Z.
Lietti, S. M.
Lim, J. K.
Lima, J. G. R.
Lincoln, D.
Linnemann, J.
Lipaev, V. V.
Lipton, R.
Liu, Y.
Liu, Z.
Lobodenko, A.
Lokajicek, M.
Love, P.
Lubatti, H. J.
Luna, R.
Lyon, A. L.
Maciel, A. K. A.
Mackin, D.
Madaras, R. J.
Maettig, P.
Magass, C.
Magerkurth, A.
Mal, P. K.
Malbouisson, H. B.
Malik, S.
Malyshev, V. L.
Mao, H. S.
Maravin, Y.
Martin, B.
McCarthy, R.
Melnitchouk, A.
Mendoza, L.
Mercadante, P. G.
Merkin, M.
Merritt, K. W.
Meyer, A.
Meyer, J.
Millet, T.
Mitrevski, J.
Mommsen, R. K.
Mondal, N. K.
Moore, R. W.
Moulik, T.
Muanza, G. S.
Mulhearn, M.
Mundal, O.
Mundim, L.
Nagy, E.
Naimuddin, M.
Narain, M.
Naumann, N. A.
Neal, H. A.
Negret, J. P.
Neustroev, P.
Nilsen, H.
Nogima, H.
Novaes, S. F.
Nunnemann, T.
O'Dell, V.
O'Neil, D. C.
Obrant, G.
Ochando, C.
Onoprienko, D.
Oshima, N.
Osman, N.
Osta, J.
Otec, R.
Otero y Garzon, G. J.
Owen, M.
Padley, P.
Pangilinan, M.
Parashar, N.
Park, S. -J.
Park, S. K.
Parsons, J.
Partridge, R.
Parua, N.
Patwa, A.
Pawloski, G.
Penning, B.
Perfilov, M.
Peters, K.
Peters, Y.
Petroff, P.
Petteni, M.
Piegaia, R.
Piper, J.
Pleier, M. -A.
Podesta-Lerma, P. L. M.
Podstavkov, V. M.
Pogorelov, Y.
Pol, M. -E.
Polozov, P.
Pope, B. G.
Popov, A. V.
Potter, C.
Prado da Silva, W. L.
Prosper, H. B.
Protopopescu, S.
Qian, J.
Quadt, A.
Quinn, B.
Rakitine, A.
Rangel, M. S.
Ranjan, K.
Ratoff, P. N.
Renkel, P.
Reucroft, S.
Rich, P.
Rieger, J.
Rijssenbeek, M.
Ripp-Baudot, I.
Rizatdinova, F.
Robinson, S.
Rodrigues, R. F.
Rominsky, M.
Royon, C.
Rubinov, P.
Ruchti, R.
Safronov, G.
Sajot, G.
Sanchez-Hernandez, A.
Sanders, M. P.
Sanghi, B.
Savage, G.
Sawyer, L.
Scanlon, T.
Schaile, D.
Schamberger, R. D.
Scheglov, Y.
Schellman, H.
Schliephake, T.
Schlobohm, S.
Schwanenberger, C.
Schwartzman, A.
Schwienhorst, R.
Sekaric, J.
Severini, H.
Shabalina, E.
Shamim, M.
Shary, V.
Shchukin, A. A.
Shivpuri, R. K.
Siccardi, V.
Simak, V.
Sirotenko, V.
Skubic, P.
Slattery, P.
Smirnov, D.
Snow, G. R.
Snow, J.
Snyder, S.
Soeldner-Rembold, S.
Sonnenschein, L.
Sopczak, A.
Sosebee, M.
Soustruznik, K.
Spurlock, B.
Stark, J.
Steele, J.
Stolin, V.
Stoyanova, D. A.
Strandberg, J.
Strandberg, S.
Strang, M. A.
Strauss, E.
Strauss, M.
Stroehmer, R.
Strom, D.
Stutte, L.
Sumowidagdo, S.
Svoisky, P.
Sznajder, A.
Tamburello, P.
Tanasijczuk, A.
Taylor, W.
Tiller, B.
Tissandier, F.
Titov, M.
Tokmenin, V. V.
Torchiani, I.
Tsybychev, D.
Tuchming, B.
Tully, C.
Tuts, P. M.
Unalan, R.
Uvarov, L.
Uvarov, S.
Uzunyan, S.
Vachon, B.
van den Berg, P. J.
Van Kooten, R.
van Leeuwen, W. M.
Varelas, N.
Varnes, E. W.
Vasilyev, I. A.
Vaupel, M.
Verdier, P.
Vertogradov, L. S.
Verzocchi, M.
Vilanova, D.
Villeneuve-Seguier, F.
Vint, P.
Vokac, P.
Von Toerne, E.
Voutilainen, M.
Wagner, R.
Wahl, H. D.
Wang, L.
Wang, M. H. L. S.
Warchol, J.
Watts, G.
Wayne, M.
Weber, G.
Weber, M.
Welty-Rieger, L.
Wenger, A.
Wermes, N.
Wetstein, M.
White, A.
Wicke, D.
Wilson, G. W.
Wimpenny, S. J.
Wobisch, M.
Wood, D. R.
Wyatt, T. R.
Xie, Y.
Yacoob, S.
Yamada, R.
Yang, W. -C.
Yasuda, T.
Yatsunenko, Y. A.
Yin, H.
Yip, K.
Yoo, H. D.
Youn, S. W.
Yu, J.
Zeitnitz, C.
Zelitch, S.
Zhao, T.
Zhou, B.
Zhu, J.
Zielinski, M.
Zieminska, D.
Zieminski, A.
Zivkovic, L.
Zutshi, V.
Zverev, E. G.
TI Search for Anomalous Wtb Couplings in Single Top Quark Production
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID STANDARD-MODEL; GAUGE BOSONS; TEVATRON; EVENTS
AB In 0.9 fb(-1) of pp collisions, the D0 Collaboration presented evidence for single top quark production in events with an isolated lepton, missing transverse momentum, and two to four jets. We examine these data to study the Lorentz structure of the Wtb coupling. The standard model predicts a left-handed vector coupling at the Wtb vertex. The most general lowest dimension, CP-conserving Lagrangian admits right-handed vector and left- or right-handed tensor couplings as well. We find that the data prefer the left-handed vector coupling and set upper limits on the anomalous couplings. These are the first direct constraints on a general Wtb interaction and the first direct limits on left- and right-handed tensor couplings.
C1 [Abazov, V. M.; Alexeev, G. D.; Kharzheev, Y. M.; Malyshev, V. L.; Tokmenin, V. V.; Vertogradov, L. S.; Yatsunenko, Y. A.] Joint Inst Nucl Res, Dubna, Russia.
[Piegaia, R.; Tanasijczuk, A.] Univ Buenos Aires, Buenos Aires, DF, Argentina.
[Alves, G. A.; Barreto, J.; da Motta, H.; Maciel, A. K. A.; Pol, M. -E.; Rangel, M. S.] Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil.
[Jesus, A. C. S. Assis; Begalli, M.; Carvalho, W.; Martins, C. De Oliveira; Luna, R.; Malbouisson, H. B.; Mundim, L.; Nogima, H.; Prado da Silva, W. L.; Rodrigues, R. F.; Sznajder, A.] Univ Estado Rio de Janeiro, BR-20550011 Rio De Janeiro, Brazil.
[Gregores, E. M.] Univ Fed ABC, Santo Andre, Brazil.
[Lietti, S. M.; Mercadante, P. G.; Novaes, S. F.] Univ Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, Brazil.
[Aguilo, E.; Beale, S.; Gillberg, D.; Liu, Z.; Moore, R. W.; O'Neil, D. C.; Potter, C.; Taylor, W.; Vachon, B.] Univ Alberta, Edmonton, AB, Canada.
[Aguilo, E.; Beale, S.; Gillberg, D.; Liu, Z.; Moore, R. W.; O'Neil, D. C.; Potter, C.; Taylor, W.; Vachon, B.] Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada.
[Aguilo, E.; Beale, S.; Gillberg, D.; Liu, Z.; Moore, R. W.; O'Neil, D. C.; Potter, C.; Taylor, W.; Vachon, B.] York Univ, Toronto, ON M3J 2R7, Canada.
[Aguilo, E.; Beale, S.; Gillberg, D.; Liu, Z.; Moore, R. W.; O'Neil, D. C.; Potter, C.; Taylor, W.; Vachon, B.] McGill Univ, Montreal, PQ, Canada.
[Bu, X. B.; Han, L.; Liu, Y.; Yin, H.] Univ Sci & Technol China, Hefei 230026, Peoples R China.
[Avila, C.; Gomez, B.; Mendoza, L.; Negret, J. P.] Univ Los Andes, Bogota, Colombia.
[Hynek, V.; Kvita, J.; Soustruznik, K.] Charles Univ Prague, Ctr Particle Phys, Prague, Czech Republic.
[Hubacek, Z.; Otec, R.; Simak, V.; Vokac, P.] Czech Tech Univ, CR-16635 Prague, Czech Republic.
[Kupco, A.; Lokajicek, M.] Acad Sci Czech Republic, Inst Phys, Ctr Particle Phys, Prague, Czech Republic.
[Hoeneisen, B.] Univ San Francisco Quito, Quito, Ecuador.
[Badaud, F.; Gay, P.; Gris, Ph.; Lacroix, F.; Tissandier, F.] Univ Clermont Ferrand, CNRS, IN2P3, LPC, Clermont, France.
[Arnoud, Y.; Chevallier, F.; Crepe-Renaudin, S.; Martin, B.; Sajot, G.; Stark, J.] Univ Grenoble 1, CNRS, IN2P3, Inst Natl Polytech Grenoble,LPSC, Grenoble, France.
[Barfuss, A. -F.; Cousinou, M. -C.; Duperrin, A.; Kajfasz, E.; Kermiche, S.; Nagy, E.] Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France.
[Calvet, S.; Duflot, L.; Grivaz, J. -F.; Jaffre, M.; Ochando, C.] Univ Paris Sud, LAL, CNRS, IN2P3, Marseille, France.
[Andrieu, B.; Bernardi, G.; Lellouch, J.; Sanders, M. P.; Sonnenschein, L.] Univ Paris 06, LPNHE, CNRS, IN2P3, Paris, France.
[Andrieu, B.; Bernardi, G.; Lellouch, J.; Sanders, M. P.; Sonnenschein, L.] Univ Paris 07, LPNHE, CNRS, IN2P3, Paris, France.
[Arthaud, M.; Bassler, U.; BesanOon, M.; Chakraborty, D.; Couderc, F.; Deliot, F.; Royon, C.; Shary, V.; Titov, M.; Vilanova, D.] CEA, Irfu, SPP, Saclay, France.
[Bloch, D.; Geist, W.; Gele, D.; Ripp-Baudot, I.; Siccardi, V.] Univ Strasbourg, IPHC, CNRS, IN2P3, Strasbourg, France.
[Biscarat, C.; Grenier, G.; Kurca, T.; Lebrun, P.; Millet, T.; Muanza, G. S.; Verdier, P.] Univ Lyon 1, IPNL, CNRS, IN2P3, Villeurbanne, France.
[Biscarat, C.; Grenier, G.; Kurca, T.; Lebrun, P.; Millet, T.; Muanza, G. S.; Verdier, P.] Univ Lyon, Lyon, France.
[Hebbeker, T.; Kirsch, M.; Magass, C.; Meyer, A.] Univ Aachen, Rhein Westfal TH Aachen, Inst Phys A3, Aachen, Germany.
[Buescher, V.; Hohlfeld, M.; Mundal, O.; Piper, J.; Wermes, N.] Univ Bonn, Inst Phys, D-5300 Bonn, Germany.
[Bernhard, R.; Jakobs, K.; Konrath, J. -P.; Nilsen, H.; Penning, B.; Torchiani, I.] Univ Freiburg, Fak Phys, D-7800 Freiburg, Germany.
[Fiedler, F.; Kuhl, T.; Weber, G.] Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany.
[Calfayan, P.; Grohsjean, A.; Haefner, P.; Nunnemann, T.; Schaile, D.; Stroehmer, R.; Tiller, B.] Univ Munich, Munich, Germany.
[Hoeth, H.; Maettig, P.; Peters, K.; Schliephake, T.; Vaupel, M.; Wicke, D.; Zeitnitz, C.] Univ Wuppertal, Fachbereich Phys, Wuppertal, Germany.
[Beri, S. B.; Bhatnagar, V.; Kohli, J. M.] Panjab Univ, Chandigarh 160014, India.
[Choudhary, B.; Dubey, A.; Ranjan, K.; Shivpuri, R. K.] Univ Delhi, Delhi 110007, India.
[Acharya, B. S.; Banerjee, P.; Banerjee, S.; Dugad, S. R.; Mondal, N. K.] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India.
[Cwiok, M.; Gruenendahl, S.] Univ Coll Dublin, Dublin 2, Ireland.
[Kim, T. J.; Lim, J. K.; Park, S. K.] Korea Univ, Korea Detector Lab, Seoul, South Korea.
[Choi, S.] Sungkyunkwan Univ, Suwon, South Korea.
[Castilla-Valdez, H.; Sanchez-Hernandez, A.] CINVESTAV, Mexico City 14000, DF, Mexico.
[Hegeman, J. G.; Houben, P.; van den Berg, P. J.; van Leeuwen, W. M.] FOM, Inst NIKHEF, NL-1098 SJ Amsterdam, Netherlands.
[Hegeman, J. G.; Houben, P.; van den Berg, P. J.; van Leeuwen, W. M.] Univ Amsterdam, NIKHEF, Amsterdam, Netherlands.
[Anastasoaie, M.; Ancu, L. S.; de Jong, S. J.; Filthaut, F.; Galea, C. F.; Naumann, N. A.] Radboud Univ Nijmegen, NIKHEF, NL-6525 ED Nijmegen, Netherlands.
[Gavrilov, V.; Polozov, P.; Safronov, G.; Stolin, V.] Inst Theoret & Expt Phys, Moscow 117259, Russia.
[Boos, E. E.; Bunichev, V.; Dudko, L. V.; Karmanov, D.; Kuzmin, V. A.; Leflat, A.; Perfilov, M.; Zverev, E. G.] Moscow MV Lomonosov State Univ, Moscow, Russia.
[Bezzubov, V. A.; Denisov, D.; Kozelov, A. V.; Lipaev, V. V.; Popov, A. V.; Shchukin, A. A.; Stoyanova, D. A.; Vasilyev, I. A.] Inst High Energy Phys, Protvino, Russia.
Petersburg Nucl Phys Inst, St Petersburg, Russia.
[Alkhazov, G.; Lobodenko, A.; Neustroev, P.; Obrant, G.; Scheglov, Y.; Uvarov, L.; Uvarov, S.] Royal Inst Technol, Stockholm, Sweden.
[Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, J.] Lund Univ, Lund, Sweden.
[Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, J.] Stockholm Univ, S-10691 Stockholm, Sweden.
[Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, J.] Uppsala Univ, Uppsala, Sweden.
[Bertram, I.; Borissov, G.; Fox, H.; Love, P.; Rakitine, A.] Univ Lancaster, Lancaster, England.
[Bauer, D.; Beuselinck, R.; Blekman, F.; Buszello, C. P.; Christoudias, T.; Davies, G.] Univ London Imperial Coll Sci Technol & Med, London, England.
[Harder, K.; Mommsen, R. K.; Owen, M.; Peters, K.; Rich, P.] Univ Manchester, Manchester, Lancs, England.
[Cheu, E.; Das, A.; Johns, K.; Tamburello, P.; Varnes, E. W.] Univ Arizona, Tucson, AZ 85721 USA.
[Madaras, R. J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Hall, R. E.] Calif State Univ Fresno, Fresno, CA 93740 USA.
[Chandra, A.; Ellison, J.; Heinson, A. P.; Li, J.; Wimpenny, S. J.] Univ Calif Riverside, Riverside, CA 92521 USA.
[Adams, M.; Askew, A.; Atramentov, O.; Blessing, S.; Buchanan, N. J.] Florida State Univ, Tallahassee, FL 32306 USA.
[Aoki, M.; Bagby, L.; Baldin, B.; Bartlett, J. F.; Bellantoni, L.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Adams, T.; Gerber, C. E.; Shabalina, E.; Varelas, N.] Univ Illinois, Chicago, IL 60607 USA.
[Blazey, G.; Chakraborty, D.; Dyshkant, A.; Fortner, M.; Hedin, D.] No Illinois Univ, De Kalb, IL 60115 USA.
[Andeen, T.; Anzelc, M. S.; Buchholz, D.; Kirby, M. H.] Northwestern Univ, Evanston, IL 60208 USA.
[Evans, H.; Parua, N.; Rieger, J.; Van Kooten, R.; Welty-Rieger, L.; Zieminski, A.] Indiana Univ, Bloomington, IN 47405 USA.
[Chan, K. M.; Hildreth, M. D.; Lam, D.; Osta, J.; Pogorelov, Y.] Univ Notre Dame, Notre Dame, IN 46556 USA.
[Parashar, N.] Purdue Univ Calumet, Hammond, IN 46323 USA.
[Hauptman, J. M.] Iowa State Univ, Ames, IA 50011 USA.
[Baringer, P.; Bean, A.; Clutter, J.; Moulik, T.; Wilson, G. W.] Univ Kansas, Lawrence, KS 66045 USA.
[Ahsan, M.; Bandurin, D. V.; Bolton, T. A.; Cuplov, V.; Ferapontov, A. V.; Maravin, Y.] Kansas State Univ, Manhattan, KS 66506 USA.
[Arov, M.; Greenwood, Z. D.; Kalk, J. M.; Sawyer, L.; Steele, J.] Louisiana Tech Univ, Ruston, LA 71272 USA.
[Eno, S.; Hadley, N. J.; Jarvis, C.; Wang, L.; Wetstein, M.] Univ Maryland, College Pk, MD 20742 USA.
[Boline, D.; Butler, J. M.; Cho, D. K.; Heintz, U.; Jabeen, S.] Boston Univ, Boston, MA 02215 USA.
[Alverson, G.; Barberis, E.; Hesketh, G.; Reucroft, S.; Wood, D. R.] Northeastern Univ, Boston, MA 02115 USA.
[De La Cruz-Burelo, E.; Degenhardt, J. D.; Magerkurth, A.; Neal, H. A.; Qian, J.] Univ Michigan, Ann Arbor, MI 48109 USA.
[Abolins, M.; Benitez, J. A.; Brock, R.; Dyer, J.; Edmunds, D.; Hall, R. E.; Hauser, R.; Kraus, J.; Linnemann, J.; Piper, J.] Michigan State Univ, E Lansing, MI 48824 USA.
[Melnitchouk, A.; Quinn, B.] Univ Mississippi, University, MS 38677 USA.
[Bloom, K.; Claes, D.; Dominguez, A.; Eads, M.; Malik, S.; Snow, J.] Univ Nebraska, Lincoln, NE 68588 USA.
[Haley, J.; Schwartzman, A.; Tully, C.; Wagner, R.] Princeton Univ, Princeton, NJ 08544 USA.
[Iashvili, I.; Kharchilava, A.; Kumar, A.; Strang, M. A.] SUNY Buffalo, Buffalo, NY 14260 USA.
[Brooijmans, G.; Gadfort, T.; Haas, A.; Johnson, C.; Katsanos, I.; Khatidze, D.; Lammers, S.; Mitrevski, J.; Mulhearn, M.; Parsons, J.; Zivkovic, L.] Columbia Univ, New York, NY 10027 USA.
[Cammin, J.; Demina, R.; Ferbel, T.; Garcia, C.; Harel, A.; Slattery, P.; Zielinski, M.] Univ Rochester, Rochester, NY 14627 USA.
[Dong, H.; Grannis, P. D.; Guo, F.; Guo, J.; Herner, K.; Hobbs, J. D.; Hu, Y.; McCarthy, R.; Rijssenbeek, M.; Schamberger, R. D.; Strauss, E.; Tsybychev, D.; Zhu, J.] SUNY Stony Brook, Stony Brook, NY 11794 USA.
[Begel, M.; Evdokimov, A.; Patwa, A.; Protopopescu, S.; Snyder, S.; Yip, K.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Burnett, T. H.; Dorland, T.; Garcia-Bellido, A.; Goussiou, A.; Lubatti, H. J.; Mal, P. K.; Schlobohm, S.; Watts, G.; Zhao, T.] Langston Univ, Langston, OK 73050 USA.
[Abbott, B.; Gutierrez, P.; Hossain, S.; Jain, S.; Rominsky, M.; Severini, H.; Strauss, M.] Univ Oklahoma, Norman, OK 73019 USA.
[Khanov, A.; Rizatdinova, F.] Oklahoma State Univ, Stillwater, OK 74078 USA.
[Bose, T.; Christofek, L.; Cutts, D.; Enari, Y.; Landsberg, G.; Narain, M.; Pangilinan, M.; Partridge, R.; Xie, Y.; Yoo, H. D.] Brown Univ, Providence, RI 02912 USA.
[Brandt, A.; De, K.; Kaushik, V.; Sosebee, M.; Spurlock, B.; White, A.; Yu, J.] Univ Texas Arlington, Arlington, TX 76019 USA.
[Kehoe, R.; Renkel, P.] So Methodist Univ, Dallas, TX 75275 USA.
[Bargassa, P.; Corcoran, M.; Mackin, D.; Padley, P.; Pawloski, G.] Rice Univ, Houston, TX 77005 USA.
[Brown, D.; Buehler, M.; Hirosky, R.; Zelitch, S.] Univ Virginia, Charlottesville, VA 22901 USA.
[Burnett, T. H.; Dorland, T.; Garcia-Bellido, A.; Goussiou, A.; Lubatti, H. J.; Mal, P. K.; Schlobohm, S.; Watts, G.; Zhou, B.] Univ Washington, Seattle, WA 98195 USA.
RP Abazov, VM (reprint author), Joint Inst Nucl Res, Dubna, Russia.
RI Bargassa, Pedrame/O-2417-2016; Juste, Aurelio/I-2531-2015; Fisher,
Wade/N-4491-2013; Ancu, Lucian Stefan/F-1812-2010; Alves,
Gilvan/C-4007-2013; Deliot, Frederic/F-3321-2014; Sharyy,
Viatcheslav/F-9057-2014; Kupco, Alexander/G-9713-2014; Christoudias,
Theodoros/E-7305-2015; KIM, Tae Jeong/P-7848-2015; Guo, Jun/O-5202-2015;
Sznajder, Andre/L-1621-2016; Li, Liang/O-1107-2015; Perfilov,
Maxim/E-1064-2012; Boos, Eduard/D-9748-2012; Merkin,
Mikhail/D-6809-2012; Novaes, Sergio/D-3532-2012; Mercadante,
Pedro/K-1918-2012; Mundim, Luiz/A-1291-2012; Yip, Kin/D-6860-2013; De,
Kaushik/N-1953-2013; Shivpuri, R K/A-5848-2010; Gutierrez,
Phillip/C-1161-2011; bu, xuebing/D-1121-2012; Dudko, Lev/D-7127-2012;
Leflat, Alexander/D-7284-2012
OI Belanger-Champagne, Camille/0000-0003-2368-2617; Begel,
Michael/0000-0002-1634-4399; Haas, Andrew/0000-0002-4832-0455; Weber,
Michele/0000-0002-2770-9031; Grohsjean, Alexander/0000-0003-0748-8494;
Melnychuk, Oleksandr/0000-0002-2089-8685; Bassler,
Ursula/0000-0002-9041-3057; Filthaut, Frank/0000-0003-3338-2247;
Naumann, Axel/0000-0002-4725-0766; Malik, Sudhir/0000-0002-6356-2655;
Blazey, Gerald/0000-0002-7435-5758; Wahl, Horst/0000-0002-1345-0401;
Gershtein, Yuri/0000-0002-4871-5449; Weber, Gernot/0000-0003-4199-1640;
Bean, Alice/0000-0001-5967-8674; Madaras, Ronald/0000-0001-7399-2993;
Bargassa, Pedrame/0000-0001-8612-3332; Carrera,
Edgar/0000-0002-0857-8507; Hedin, David/0000-0001-9984-215X; Juste,
Aurelio/0000-0002-1558-3291; de Jong, Sijbrand/0000-0002-3120-3367;
Landsberg, Greg/0000-0002-4184-9380; Blessing,
Susan/0000-0002-4455-7279; Duperrin, Arnaud/0000-0002-5789-9825;
Hoeneisen, Bruce/0000-0002-6059-4256; Blekman,
Freya/0000-0002-7366-7098; Beuselinck, Raymond/0000-0003-2613-7446;
Heinson, Ann/0000-0003-4209-6146; grannis, paul/0000-0003-4692-2142;
Qian, Jianming/0000-0003-4813-8167; Evans, Harold/0000-0003-2183-3127;
Ancu, Lucian Stefan/0000-0001-5068-6723; Sharyy,
Viatcheslav/0000-0002-7161-2616; Christoudias,
Theodoros/0000-0001-9050-3880; KIM, Tae Jeong/0000-0001-8336-2434; Guo,
Jun/0000-0001-8125-9433; Sznajder, Andre/0000-0001-6998-1108; Li,
Liang/0000-0001-6411-6107; Sawyer, Lee/0000-0001-8295-0605; Novaes,
Sergio/0000-0003-0471-8549; Mundim, Luiz/0000-0001-9964-7805; Yip,
Kin/0000-0002-8576-4311; De, Kaushik/0000-0002-5647-4489; Dudko,
Lev/0000-0002-4462-3192;
FU CEA [CNRS/ IN2P3]; FASI, Rosatom; RFBR Russia; CNPq; FAPERJ; DOE and NSF
(USA); CEA and CNRS/IN2P3 (France); FASI, Rosatom, and RFBR (Russia);
CNPq, FAPERJ, FAPESP, and FUNDUNESP (Brazil); DAE and DST (India);
Colciencias (Colombia); CONACyT (Mexico; KRF and KOSEF (Korea); CONICET
and UBACyT (Argentina); FOM (The Netherlands); STFC (United Kingdom);
MSMT and GACR (Czech Republic); CRC Program, CFI, NSERC, and WestGrid
Project (Canada); BMBF and DFG (Germany); SFI (Ireland); The Swedish
Research Council (Sweden); CAS and CNSF (China); Alexander von Humboldt
Foundation (Germany)
FX We thank the staffs at Fermilab and collaborating institutions and
acknowledge support from the DOE and NSF (USA); CEA and CNRS/IN2P3
(France); FASI, Rosatom, and RFBR (Russia); CNPq, FAPERJ, FAPESP, and
FUNDUNESP (Brazil); DAE and DST (India); Colciencias (Colombia); CONACyT
(Mexico); KRF and KOSEF (Korea); CONICET and UBACyT (Argentina); FOM
(The Netherlands); STFC (United Kingdom); MSMT and GACR (Czech
Republic); CRC Program, CFI, NSERC, and WestGrid Project (Canada); BMBF
and DFG (Germany); SFI (Ireland); The Swedish Research Council (Sweden);
CAS and CNSF (China); and the Alexander von Humboldt Foundation
(Germany).
NR 32
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 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD NOV 28
PY 2008
VL 101
IS 22
AR 221801
DI 10.1103/PhysRevLett.101.221801
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 376WT
UT WOS:000261214400012
ER
EF