FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Nazaretski, E
   Akhadov, EA
   Cha, KC
   Pelekhov, DV
   Martin, I
   Graham, KS
   Hammel, PC
   Movshovich, R
AF Nazaretski, E.
   Akhadov, E. A.
   Cha, K. C.
   Pelekhov, D. V.
   Martin, I.
   Graham, K. S.
   Hammel, P. C.
   Movshovich, R.
TI Ferromagnetic resonance force microscopy studies of a continuous
   permalloy-cobalt film
SO PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT 3rd Seeheim Conference on Magnetism (SCM2007)
CY AUG 26-30, 2007
CL Frankfurt, GERMANY
AB Magnetic resonance force microscopy (MRFM) offers a means of performing local ferromagnetic resonance. We have studied the evolution of the MRFM force spectra in a continuous 20 nm thick cobalt-permalloy film as a function of lateral position. We clearly observed localized resonance signals originating from cobalt and permalloy. The spatial resolution in our experiments was determined to be better than 5 pm thus opening up the possibility to perform localized spectroscopic studies in continuous ferromagnetic samples. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 [Nazaretski, E.; Akhadov, E. A.; Cha, K. C.; Martin, I.; Graham, K. S.; Movshovich, R.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Pelekhov, D. V.; Hammel, P. C.] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
RP Nazaretski, E (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM evgnaz@lanl.gov; akhadov@lanl.gov
RI Hammel, P Chris/O-4845-2014
OI Hammel, P Chris/0000-0002-4138-4798
NR 17
TC 1
Z9 1
U1 0
U2 2
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 1862-6300
J9 PHYS STATUS SOLIDI A
JI Phys. Status Solidi A-Appl. Mat.
PD AUG
PY 2008
VL 205
IS 8
BP 1758
EP 1761
DI 10.1002/pssa.200723465
PG 4
WC Materials Science, Multidisciplinary; Physics, Applied; Physics,
   Condensed Matter
SC Materials Science; Physics
GA 343OP
UT WOS:000258863700005
ER

PT J
AU Kim, WJ
   Brown-Hayes, M
   Dalvit, DAR
   Brownell, JH
   Onofrio, R
AF Kim, W. J.
   Brown-Hayes, M.
   Dalvit, D. A. R.
   Brownell, J. H.
   Onofrio, R.
TI Anomalies in electrostatic calibrations for the measurement of the
   Casimir force in a sphere-plane geometry
SO PHYSICAL REVIEW A
LA English
DT Article
ID MU-M; MICROSCOPY; RANGE
AB We have performed precision electrostatic calibrations in the sphere-plane geometry and observed anomalous behavior. Namely, the scaling exponent of the electrostatic signal with distance was found to be smaller than expected on the basis of the pure Coulombian contribution and the residual potential found to be distance dependent. We argue that these findings affect the accuracy of the electrostatic calibrations and invite reanalysis of previous determinations of the Casimir force.
C1 [Kim, W. J.; Brown-Hayes, M.; Brownell, J. H.; Onofrio, R.] Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA.
   [Dalvit, D. A. R.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   [Onofrio, R.] Univ Padua, Dipartimento Fis Galileo Galilei, I-35131 Padua, Italy.
RP Kim, WJ (reprint author), Yale Univ, Dept Phys, 217 Prospect St, New Haven, CT 06520 USA.
RI Kim, Woo-Joong/G-6876-2011
NR 28
TC 72
Z9 72
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD AUG
PY 2008
VL 78
IS 2
AR 020101
DI 10.1103/PhysRevA.78.020101
PN A
PG 4
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 349EF
UT WOS:000259263400001
ER

PT J
AU Owens, IJ
   Hughes, RJ
   Nordholt, JE
AF Owens, I. J.
   Hughes, R. J.
   Nordholt, J. E.
TI Entangled quantum-key-distribution randomness
SO PHYSICAL REVIEW A
LA English
DT Article
ID CRYPTOGRAPHY; PHOTONS
AB Random number generators are important components of information security systems. In particular, cryptography standards require that the numbers generated by quantum key distribution applications meet a rigorous set of standardized randomness tests. To date, implementations of entangled quantum key distribution (EQKD) have not included any randomness assessment. We report on the results of randomness tests and highlight how typical EQKD system operation affects the successes and failures in meeting the fundamental test criteria.
C1 [Owens, I. J.; Hughes, R. J.; Nordholt, J. E.] Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA.
RP Owens, IJ (reprint author), Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA.
EM iowens@lanl.gov
FU Intelligence Community (IC)
FX The authors thank Jim W. Harrington, Danna Rosenberg, Charles G.
   Peterson, and Marco Fiorentino for helpful discussions and software
   assistance. Financial support from the Intelligence Community (IC) is
   gratefully acknowledged.
NR 12
TC 6
Z9 6
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 AUG
PY 2008
VL 78
IS 2
AR 022307
DI 10.1103/PhysRevA.78.022307
PN A
PG 5
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 349EF
UT WOS:000259263400043
ER

PT J
AU Sapirstein, J
   Cheng, KT
AF Sapirstein, J.
   Cheng, K. T.
TI Calculation of radiative corrections to hyperfine splitting in p(3/2)
   states
SO PHYSICAL REVIEW A
LA English
DT Article
ID MANY-BODY PROBLEM; IONS; HELIUM; CESIUM; ATOMS
AB A recent calculation of the one-loop radiative correction to hyperfine splitting (hfs) of p(1/2) states that includes binding corrections to all orders is extended to p(3/2) states. Nuclear structure plays an essentially negligible role for such states, which is highly advantageous, as difficulties in controlling the Bohr-Weisskopf effect complicate the isolation of QED contributions for both s(1/2) and p(1/2) states. Three cases are studied. We first treat the hydrogen isoelectronic sequence, which is completely nonperturbative in Z alpha for high Z. Secondly the lowest lying p(3/2) states of the neutral alkali-metal atoms are treated, and finally lithiumlike bismuth, where extensive theoretical and experimental studies of the hfs of 2s and 2p(1/2) states have been made, is addressed.
C1 [Sapirstein, J.] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
   [Cheng, K. T.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Sapirstein, J (reprint author), Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
EM jsapirst@nd.edu; ktcheng@llnl.gov
FU NSF [PHY-0451842, PHY-0757125]; U.S. Department of Energy by Lawrence
   Livermore National Laboratory [DE-AC52-07NA27344]
FX The work of J.S. was supported in part by NSF Grant Nos. PHY-0451842 and
   PHY-0757125. The work of K.T.C. was performed under the auspices of the
   U.S. Department of Energy by Lawrence Livermore National Laboratory
   under Contract No. DE-AC52-07NA27344.
NR 32
TC 9
Z9 9
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 AUG
PY 2008
VL 78
IS 2
AR 022515
DI 10.1103/PhysRevA.78.022515
PN A
PG 8
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 349EF
UT WOS:000259263400088
ER

PT J
AU Yip, FL
   McCurdy, CW
   Rescigno, TN
AF Yip, F. L.
   McCurdy, C. W.
   Rescigno, T. N.
TI Hybrid Gaussian-discrete-variable representation approach to molecular
   continuum processes: Application to photoionization of diatomic Li(2)(+)
SO PHYSICAL REVIEW A
LA English
DT Article
ID DIFFERENTIAL CROSS-SECTIONS; AB-INITIO CALCULATIONS; QUANTUM SCATTERING;
   CORE-POLARIZATION; ELECTRON-IMPACT; EXCITED-STATES; IONIZATION; H-2;
   INTERFERENCE; ENERGIES
AB We describe an approach for studying molecular photoionization with a hybrid basis that combines the functionality of analytic basis sets to represent electronic coordinates near the nuclei of a molecule with numerically defined grid-based functions. We discuss the evaluation of the various classes of two-electron integrals that occur in a hybrid basis consisting of Gaussian-type orbitals and discrete-variable representation functions. This combined basis is applied to calculate single photoionization cross sections for molecular Li(2)(+), which has a large equilibrium bond distance (R=5.86a(0)). The highly nonspherical nature of Li(2)(+) molecules causes higher angular momentum components to contribute significantly to the cross section even at low photoelectron energies, resulting in angular distributions that appear to be f-wave dominated near the photoionization threshold. At higher energies, where the de Broglie wavelength of the photoelectron becomes comparable with the bond distance, interference effects appear in the photoionization cross section. These interference phenomena appear at much lower energies than would be expected for diatomic targets with shorter internuclear separations.
C1 [Yip, F. L.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Yip, F. L.; McCurdy, C. W.; Rescigno, T. N.] Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [McCurdy, C. W.] Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA.
   [McCurdy, C. W.] Univ Calif Davis, Dept Chem, Davis, CA 95616 USA.
RP Yip, FL (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
FU U.S. Department of Energy by the University of California Lawrence
   Berkeley National Laboratory [DE-AC02-05CH11231]; U.S. DOE Office of
   Basic Energy Sciences, Division of Chemical Sciences; NSF [PHY0604628]
FX This work was performed under the auspices of the U.S. Department of
   Energy by the University of California Lawrence Berkeley National
   Laboratory under Contract No. DE-AC02-05CH11231 and was supported by the
   U.S. DOE Office of Basic Energy Sciences, Division of Chemical Sciences.
   C.W.M. acknowledges support from the NSF Grant No. (PHY0604628).
NR 45
TC 10
Z9 10
U1 0
U2 6
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 AUG
PY 2008
VL 78
IS 2
AR 023405
DI 10.1103/PhysRevA.78.023405
PN B
PG 12
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 349EG
UT WOS:000259263500005
ER

PT J
AU Zhaunerchyk, V
   Vigren, E
   Geppert, WD
   Hamberg, M
   Danielsson, M
   Kaminska, M
   Larsson, M
   Thomas, RD
   Bahati, E
   Vane, CR
AF Zhaunerchyk, V.
   Vigren, E.
   Geppert, W. D.
   Hamberg, M.
   Danielsson, M.
   Kaminska, M.
   Larsson, M.
   Thomas, R. D.
   Bahati, E.
   Vane, C. R.
TI Dissociative recombination of BH2+: The dominance of two-body breakup
   and an understanding of the fragmentation
SO PHYSICAL REVIEW A
LA English
DT Article
ID ABSOLUTE CROSS-SECTIONS; ION STORAGE-RING; PRODUCT BRANCHING FRACTIONS;
   MOLECULAR-IONS; EXCITATION; RATIOS; DYNAMICS; H-3(+); NH4+; H2O+
AB The dissociative recombination of BH2+ has been studied at the storage ring CRYRING. The branching fraction analysis shows that dissociative recombination is dominated by the two-body BH+H channel constituting 56% of the total reactivity with the B+H+H and B+H-2 channels being 35 and 9%, respectively. Both the measured reaction rate and fragmentation behavior are different than for previously studied XH2+ ions, which react both faster and predominantly dissociate through the full fragmentation channel. Explanations for such observations are discussed.
C1 [Zhaunerchyk, V.; Vigren, E.; Geppert, W. D.; Hamberg, M.; Danielsson, M.; Kaminska, M.; Larsson, M.; Thomas, R. D.] Stockholm Univ, Albanova Univ Ctr, Dept Phys, SE-10691 Stockholm, Sweden.
   [Kaminska, M.] Jan Kochanowski Univ Humanities & Sci, Inst Phys, PL-25406 Kielce, Poland.
   [Bahati, E.; Vane, C. R.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RP Zhaunerchyk, V (reprint author), Stockholm Univ, Albanova Univ Ctr, Dept Phys, SE-10691 Stockholm, Sweden.
EM vz@physto.se
RI Zhaunerchyk, Vitali/E-9751-2016
NR 43
TC 2
Z9 2
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD AUG
PY 2008
VL 78
IS 2
AR 024701
DI 10.1103/PhysRevA.78.024701
PN B
PG 4
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 349EG
UT WOS:000259263500092
ER

PT J
AU Alberi, K
   Yu, KM
   Stone, PR
   Dubon, OD
   Walukiewicz, W
   Wojtowicz, T
   Liu, X
   Furdyna, JK
AF Alberi, K.
   Yu, K. M.
   Stone, P. R.
   Dubon, O. D.
   Walukiewicz, W.
   Wojtowicz, T.
   Liu, X.
   Furdyna, J. K.
TI Formation of Mn-derived impurity band in III-Mn-V alloys by valence band
   anticrossing
SO PHYSICAL REVIEW B
LA English
DT Article
ID MOLECULAR-BEAM EPITAXY; MAGNETIC SEMICONDUCTORS; GAAS; FERROMAGNETISM;
   SCATTERING; GA1-XMNXAS
AB While the support for the existence of a Mn-derived impurity band in the diluted magnetic semiconductor Ga1-xMnxAs has recently increased, a detailed quantitative analysis of its formation and properties is still incomplete. Here, we show that such an impurity band arises as the result of an anticrossing interaction between the extended states of the GaAs valence band and the strongly localized Mn states according to the valence band anticrossing model. The anticrossing interpretation is substantiated by optical measurements that reveal a shift in the band gap of GaAs upon the addition of Mn and it also explains the remarkably low hole mobility in this alloy. Furthermore, the presence of a Mn-derived impurity band correctly accounts for the metal-to-insulator transition experimentally observed in Ga1-xMnxAs1-y(N,P)(y) with y <= 0.02.
C1 [Alberi, K.; Yu, K. M.; Stone, P. R.; Dubon, O. D.; Walukiewicz, W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   [Alberi, K.; Stone, P. R.; Dubon, O. D.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
   [Wojtowicz, T.] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland.
   [Liu, X.; Furdyna, J. K.] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
RP Walukiewicz, W (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
EM W_Walukiewicz@lbl.gov
RI Yu, Kin Man/J-1399-2012; Wojtowicz, Tomasz/A-2887-2017
OI Yu, Kin Man/0000-0003-1350-9642; 
FU U.S. Department of Energy [DE-AC02-05CH11231]; National Science
   Foundation [DMR06-03752]; NSF-IGERT; NDSEG; NSF
FX This work was 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,
   and by the National Science Foundation Grant No. DMR06-03752. The
   authors thank K.S. Burch for fruitful discussions. K.A. acknowledges
   support from an NSF-IGERT traineeship, and P.R.S. acknowledges support
   from NDSEG and NSF.
NR 37
TC 39
Z9 39
U1 1
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 AUG
PY 2008
VL 78
IS 7
AR 075201
DI 10.1103/PhysRevB.78.075201
PG 7
WC Physics, Condensed Matter
SC Physics
GA 351EG
UT WOS:000259406700048
ER

PT J
AU Anda, EV
   Chiappe, G
   Busser, CA
   Davidovich, MA
   Martins, GB
   Heidrich-Meisner, F
   Dagotto, E
AF Anda, E. V.
   Chiappe, G.
   Busser, C. A.
   Davidovich, M. A.
   Martins, G. B.
   Heidrich-Meisner, F.
   Dagotto, E.
TI Method to study highly correlated nanostructures: The
   logarithmic-discretization embedded-cluster approximation
SO PHYSICAL REVIEW B
LA English
DT Article
ID NUMERICAL RENORMALIZATION-GROUP; DENSITY-MATRIX RENORMALIZATION;
   HUBBARD-MODEL; QUANTUM-DOT; PERTURBATION-THEORY; ANDERSON MODEL; KONDO;
   TRANSPORT; SYSTEMS; OSCILLATIONS
AB This work proposes an approach to study transport properties of highly correlated local structures. The method, dubbed the logarithmic discretization embedded cluster approximation (LDECA), consists of diagonalizing a finite cluster containing the many-body terms of the Hamiltonian and embedding it into the rest of the system, combined with Wilson's idea of a logarithmic discretization of the representation of the Hamiltonian. The physics associated with both one embedded dot and a double-dot side coupled to leads is discussed in detail. In the former case, the results perfectly agree with Bethe ansatz data, while in the latter, the physics obtained is framed in the conceptual background of a two-stage Kondo problem. A many-body formalism provides a solid theoretical foundation to the method. We argue that LDECA is well suited to study complicated problems such as transport through molecules or quantum dot structures with complex ground states.
C1 [Busser, C. A.; Martins, G. B.] Oakland Univ, Dept Phys, Rochester, MI 48309 USA.
   [Anda, E. V.; Davidovich, M. A.] Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22453900 Rio De Janeiro, Brazil.
   [Chiappe, G.] Univ Alicante, Dept Fis Aplicada, Alicante 03690, Spain.
   [Chiappe, G.] Univ Buenos Aires, Fac Ciencias Exactas, Dept Fis JJ Giambiagi, RA-1428 Buenos Aires, DF, Argentina.
   [Busser, C. A.] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA.
   [Heidrich-Meisner, F.] Rhein Westfal TH Aachen, Inst Theoret Phys C, D-52056 Aachen, Germany.
   [Heidrich-Meisner, F.; Dagotto, E.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
   [Heidrich-Meisner, F.; Dagotto, E.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RP Martins, GB (reprint author), Oakland Univ, Dept Phys, Rochester, MI 48309 USA.
EM martins@oakland.edu
RI Heidrich-Meisner, Fabian/B-6228-2009; Busser, Carlos/K-1017-2014;
   Chiappe, Guillermo/P-8460-2014; Martins, George/C-9756-2012
OI Busser, Carlos/0000-0002-0353-7490; Chiappe,
   Guillermo/0000-0001-8077-1873; Martins, George/0000-0001-7846-708X
NR 64
TC 25
Z9 25
U1 1
U2 9
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD AUG
PY 2008
VL 78
IS 8
AR 085308
DI 10.1103/PhysRevB.78.085308
PG 16
WC Physics, Condensed Matter
SC Physics
GA 351EI
UT WOS:000259406900067
ER

PT J
AU Baishya, K
   Idrobo, JC
   Ogut, S
   Yang, ML
   Jackson, K
   Jellinek, J
AF Baishya, Kopinjol
   Idrobo, Juan C.
   Ogut, Serdar
   Yang, Mingli
   Jackson, Koblar
   Jellinek, Julius
TI Optical absorption spectra of intermediate-size silver clusters from
   first principles
SO PHYSICAL REVIEW B
LA English
DT Article
ID EXCITATION-SPECTRA; AB-INITIO; FLUORESCENCE; RESONANCES; PARTICLES;
   MATRIX; ARGON; SHIFT; SHAPE; AR
AB Optical absorption spectra of the three lowest-energy isomers of Ag(n) (n=10, 12-20) are investigated from first principles within the time-dependent local-density approximation (TDLDA). The computed spectra are found to be generally in good agreement with the available experimental data. The analyses of the spectra indicate that the d electrons of Ag(n) clusters in this size range have a significant (70%-80%) contribution to low-energy optical excitations. We show that most of the peak positions and the relative intensities in the TDLDA spectra of these subnanometer sized clusters can be explained remarkably well within the classical Mie-Gans theory, using the dielectric function of bulk Ag and taking into account the shapes of the isomers.
C1 [Baishya, Kopinjol; Idrobo, Juan C.; Ogut, Serdar] Univ Illinois, Dept Phys, Chicago, IL 60607 USA.
   [Yang, Mingli; Jackson, Koblar] Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA.
   [Jellinek, Julius] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Baishya, K (reprint author), Univ Illinois, Dept Phys, Chicago, IL 60607 USA.
RI Ogut, Serdar/B-1749-2012; Yang, Mingli/E-9983-2012; Idrobo,
   Juan/H-4896-2015; 
OI Yang, Mingli/0000-0001-8590-8840; Idrobo, Juan/0000-0001-7483-9034;
   Jackson, Koblar/0000-0002-5342-7978
FU U.S. Department of Energy Grants [DE-FG02-03ER15488, FG02-03ER15489];
   Office of Basic Energy Sciences, Division of Chemical Sciences,
   Geosciences, and Biosciences [DE-AC-02-06CH11357]; Office of Science of
   the U.S. Department of Energy
FX We would like to thank F. Conus and C. Felix for sharing with us their
   unpublished data on Ag<INF>12</INF>, Ag<INF>13</INF>, and
   Ag<INF>14</INF>, and sending us their recent work<SUP>16</SUP> during
   the preparation of this manuscript. This work was supported by the U.S.
   Department of Energy Grants No. DE-FG02-03ER15488 (K.B., J.C.I., and
   S.O.), No. FG02-03ER15489 (M.Y. and K.J.), and the Office of Basic
   Energy Sciences, Division of Chemical Sciences, Geosciences, and
   Biosciences, under Contract No. DE-AC-02-06CH11357 (J.J.). This research
   used resources of NERSC, which is supported by the Office of Science of
   the U.S. Department of Energy.
NR 56
TC 47
Z9 47
U1 2
U2 23
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD AUG
PY 2008
VL 78
IS 7
AR 075439
DI 10.1103/PhysRevB.78.075439
PG 9
WC Physics, Condensed Matter
SC Physics
GA 351EG
UT WOS:000259406700120
ER

PT J
AU Barisic, N
   Li, Y
   Zhao, XD
   Cho, YC
   Chabot-Couture, G
   Yu, GC
   Greven, M
AF Barisic, Neven
   Li, Yuan
   Zhao, Xudong
   Cho, Yong-Chan
   Chabot-Couture, Guillaume
   Yu, Guichuan
   Greven, Martin
TI Demonstrating the model nature of the high-temperature superconductor
   HgBa(2)CuO(4+delta)
SO PHYSICAL REVIEW B
LA English
DT Article
ID SINGLE-CRYSTALS; ELECTRONIC SYSTEMS; STOICHIOMETRY; DIFFRACTION; GROWTH
AB The compound HgBa(2)CuO(4+delta) (Hg1201) exhibits a simple tetragonal crystal structure and the highest superconducting transition temperature (T(c)) among all single Cu-O layer cuprates, with T(c)=97 K (onset) at optimal doping. Due to a lack of sizable single crystals, experimental work on this very attractive system has been significantly limited. Thanks to a recent breakthrough in crystal growth, such crystals have now become available. Here we demonstrate that it is possible to identify suitable heat treatment conditions to systematically and uniformly tune the hole concentration of Hg1201 crystals over a wide range, from very underdoped (T(c)=47 K, hole concentration p approximate to 0.08) to overdoped (T(c)=64 K, p approximate to 0.22). We then present quantitative magnetic susceptibility and dc charge transport results that reveal the very high-quality nature of the studied crystals. Using x-ray photoemission spectroscopy on cleaved samples, we furthermore demonstrate that it is possible to obtain large surfaces of good quality. These characterization measurements demonstrate that Hg1201 should be viewed as a model high-temperature superconductor.
C1 [Barisic, Neven; Zhao, Xudong; Cho, Yong-Chan; Greven, Martin] Stanford Univ, Stanford Synchrotron Radiat Lab, Palo Alto, CA 94305 USA.
   [Barisic, Neven] Inst Phys, HR-10000 Zagreb, Croatia.
   [Li, Yuan; Yu, Guichuan] Stanford Univ, Dept Phys, Palo Alto, CA 94305 USA.
   [Zhao, Xudong] Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China.
   [Cho, Yong-Chan] Team Nano Fus Technol BK21, Miryang 629706, South Korea.
   [Chabot-Couture, Guillaume; Greven, Martin] Stanford Univ, Dept Appl Phys, Palo Alto, CA 94305 USA.
RP Barisic, N (reprint author), Stanford Univ, Stanford Synchrotron Radiat Lab, Palo Alto, CA 94305 USA.
RI Yu, Guichuan/K-4025-2014; Barisic, Neven/E-4246-2015; 
OI Cho, Yong Chan/0000-0003-3976-8343
FU U.S. Department of Energy [DE-AC02-76SF00515]; U.S. National Science
   Foundation [DMR0705086]; Croatian Ministry of Science, Education and
   Sport [MoSES 035-0352826-2848]
FX We would like to thank T. H. Geballe for helpful comments. This work was
   supported by the U.S. Department of Energy under Contract No.
   DE-AC02-76SF00515, by the U.S. National Science Foundation under Grant
   No. DMR0705086, and by the Croatian Ministry of Science, Education and
   Sport under Grant No. MoSES 035-0352826-2848.
NR 42
TC 40
Z9 40
U1 3
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 AUG
PY 2008
VL 78
IS 5
AR 054518
DI 10.1103/PhysRevB.78.054518
PG 7
WC Physics, Condensed Matter
SC Physics
GA 350QM
UT WOS:000259368200122
ER

PT J
AU Bersch, E
   Rangan, S
   Bartynski, RA
   Garfunkel, E
   Vescovo, E
AF Bersch, Eric
   Rangan, Sylvie
   Bartynski, Robert Allen
   Garfunkel, Eric
   Vescovo, Elio
TI Band offsets of ultrathin high-kappa oxide films with Si
SO PHYSICAL REVIEW B
LA English
DT Article
ID RAY PHOTOELECTRON-SPECTROSCOPY; THIN-FILMS; INVERSE-PHOTOEMISSION;
   ELECTRONIC-STRUCTURE; GATE STACK; DIELECTRICS; INTERFACE; ALIGNMENT;
   VALENCE; HFO2
AB Valence- and conduction-band edges of ultrathin oxides (SiO(2), HfO(2), Hf(0.7)Si(0.3)O(2), ZrO(2), and Al(2)O(3)) grown on a silicon substrate have been measured using ultraviolet photoemission and inverse photoemission spectroscopies in the same UHV chamber. The combination of these two techniques has enabled the direct determination of the oxide energy gaps as well as the offsets of the oxide valence- and conduction-band edges from those of the silicon substrate. These results are supplemented with synchrotron x-ray photoemission spectroscopy measurements allowing further characterization of the oxide composition and the evaluation of the silicon substrate contribution to the spectra. The electron affinity has also been systematically measured on the same samples. We find reasonably good agreement with earlier experiments where assumptions regarding energy-gap values were needed to establish the conduction-band offsets. The systematics of our photoemission and inverse photoemission results on different ultrathin films provide a comprehensive comparison of these related systems.
C1 [Bersch, Eric; Rangan, Sylvie; Bartynski, Robert Allen] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
   [Bersch, Eric; Rangan, Sylvie; Bartynski, Robert Allen; Garfunkel, Eric] Rutgers State Univ, Surface Modificat Lab, Piscataway, NJ 08854 USA.
   [Garfunkel, Eric] Rutgers State Univ, Dept Chem & Chem Biol, Piscataway, NJ 08854 USA.
   [Vescovo, Elio] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Bersch, E (reprint author), Rutgers State Univ, Dept Phys & Astron, 136 Frelinghuysen Rd, Piscataway, NJ 08854 USA.
RI Rangan, Sylvie/H-6522-2013
FU U.S. Department of Energy; Office of Science; Office of Basic Energy
   Sciences [DE-AC02-98CH10886]; SRC; NSF
FX We are grateful for the beam time allocation at the NSLS. The National
   Synchrotron Light Source, Brookhaven National Laboratory, is supported
   by the U.S. Department of Energy, Office of Science, Office of Basic
   Energy Sciences, under Contract No. DE-AC02-98CH10886. We would like to
   thank Lyudmila Goncharova for MEIS measurements, and we acknowledge the
   generous support of the SRC and the NSF.
NR 35
TC 116
Z9 117
U1 4
U2 31
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 AUG
PY 2008
VL 78
IS 8
AR 085114
DI 10.1103/PhysRevB.78.085114
PG 10
WC Physics, Condensed Matter
SC Physics
GA 351EI
UT WOS:000259406900027
ER

PT J
AU Biswas, K
   Franceschetti, A
   Lany, S
AF Biswas, Koushik
   Franceschetti, Alberto
   Lany, Stephan
TI Generalized valence-force-field model of (Ga,In)(N,P) ternary alloys
SO PHYSICAL REVIEW B
LA English
DT Article
ID SPECIAL QUASIRANDOM STRUCTURES; SPINODAL DECOMPOSITION RANGE; RESONANT
   RAMAN-SCATTERING; AUGMENTED-WAVE METHOD; SEMICONDUCTOR ALLOYS;
   PHASE-SEPARATION; ELASTIC-CONSTANTS; ZINCBLENDE INGAN; EPITAXIAL LAYERS;
   SPECIAL POINTS
AB We present a generalized valence-force-field (VFF) model for the ternary III-V alloys (III=Ga, In and V=N, P) to predict the formation energies and atomic structures of ordered and disordered alloy configurations. For each alloy (GaInN, GaInP, GaNP, and InNP) the VFF parameters, which include bond-angle/bond-length interactions, are fitted to the first-principles calculated formation energies of 30 ternary structures. Compared to standard approaches where the VFF parameters are transferred from the individual binary III-V compounds, our generalized VFF approach predicts alloy formation energies and atomic structures with considerably improved accuracy. Using this generalized approach and random realizations in large supercells (4096 atoms), we determine the temperature-composition phase diagram, i.e., the binodal and spinodal decomposition curves, of the (Ga, In) (N, P) ternary alloys.
C1 [Biswas, Koushik; Franceschetti, Alberto; Lany, Stephan] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Biswas, K (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
OI Lany, Stephan/0000-0002-8127-8885
FU Office of Energy Efficiency and Renewable Energy; U.S. Department of
   Energy [DE-AC36-99GO10337]
FX We thank Mayeul d'Avezac (National Renewable Energy Laboratory) for the
   use of the valence-force-field code and for helpful discussions. This
   work was funded by the Office of Energy Efficiency and Renewable Energy,
   U.S. Department of Energy under Contract No. DE-AC36-99GO10337 to NREL
   through NREL's Laboratory Directed Research and Development program.
NR 69
TC 14
Z9 14
U1 1
U2 14
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD AUG
PY 2008
VL 78
IS 8
AR 085212
DI 10.1103/PhysRevB.78.085212
PG 10
WC Physics, Condensed Matter
SC Physics
GA 351EI
UT WOS:000259406900056
ER

PT J
AU Cao, J
   Vergara, LI
   Musfeldt, JL
   Litvinchuk, AP
   Wang, YJ
   Park, S
   Cheong, SW
AF Cao, J.
   Vergara, L. I.
   Musfeldt, J. L.
   Litvinchuk, A. P.
   Wang, Y. J.
   Park, S.
   Cheong, S. -W.
TI Magnetoelastic coupling in DyMn(2)O(5) via infrared spectroscopy
SO PHYSICAL REVIEW B
LA English
DT Article
ID CRYSTAL; RAMAN; FIELD; MAGNETOSTRICTION; MANGANITE; STRICTION; PHONONS
AB We investigated the infrared-active phonons in DyMn(2)O(5) as a function of temperature and magnetic field in order to elucidate the magnetic ordering-induced lattice distortions. Spin-lattice coupling in this geometrically frustrated multiferroic is evidenced by small frequency shifts of several phonon modes at various magnetic ordering temperatures, vibrational frequency shifts between 60 and 65 K from which we extract large coupling constants, and magnetic-field dependence of numerous phonons. We analyze these results in terms of local lattice distortions and discuss the consequences for the ferroelectric polarization and magnetodielectric effect.
C1 [Cao, J.; Vergara, L. I.; Musfeldt, J. L.] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
   [Litvinchuk, A. P.] Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA.
   [Litvinchuk, A. P.] Univ Houston, Dept Phys, Houston, TX 77204 USA.
   [Wang, Y. J.] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
   [Park, S.; Cheong, S. -W.] Rutgers State Univ, Rutgers Ctr Emergent Mat, Piscataway, NJ 08854 USA.
   [Park, S.; Cheong, S. -W.] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
RP Cao, J (reprint author), Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RI Cao, Jinbo/C-7537-2009; Litvinchuk, Alexander/K-6991-2012
OI Litvinchuk, Alexander/0000-0002-5128-5232
FU DOE [DE-FG02-01ER45885, NSF-DMR-0520471, NSF-DMR-0084173]; NHMFL
FX This research is supported by the DOE Contract No. DE-FG02-01ER45885
   (UT), Contract No. NSF-DMR-0520471 (Rutgers), the State of Texas (UH),
   and Contract No. NSF-DMR-0084173, DOE, and the State of Florida (NHMFL).
   We thank R. Valdes-Aguilar, C. J. Fennie, B. Lorenz, J. Lynn, and I.
   Sergienko for useful discussions.
NR 40
TC 14
Z9 14
U1 0
U2 12
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD AUG
PY 2008
VL 78
IS 6
AR 064307
DI 10.1103/PhysRevB.78.064307
PG 6
WC Physics, Condensed Matter
SC Physics
GA 349EU
UT WOS:000259264900047
ER

PT J
AU Chantis, AN
   Cardona, M
   Christensen, NE
   Smith, DL
   van Schilfgaarde, M
   Kotani, T
   Svane, A
   Albers, RC
AF Chantis, Athanasios N.
   Cardona, Manuel
   Christensen, Niels E.
   Smith, Darryl L.
   van Schilfgaarde, Mark
   Kotani, Takao
   Svane, Axel
   Albers, Robert C.
TI Strain-induced conduction-band spin splitting in GaAs from
   first-principles calculations
SO PHYSICAL REVIEW B
LA English
DT Article
ID DEFORMATION POTENTIALS; SEMICONDUCTORS; ELECTRONS; POLARIZATION;
   ORIENTATION; PRECESSION; STRESS
AB We use a recently developed self-consistent GW approximation to perform first-principles calculations of the conduction-band spin splitting in GaAs under [110] strain. The spin-orbit interaction is taken into account as a perturbation to the scalar relativistic Hamiltonian. These are the calculations of conduction-band spin splitting under deformation based on a quasiparticle approach and, because the self-consistent GW scheme accurately reproduces the relevant band parameters, it is expected to be a reliable predictor of spin splittings. We also discuss the spin-relaxation time under [110] strain and show that it exhibits an in-plane anisotropy, which can be exploited to obtain the magnitude and sign of the conduction-band spin splitting experimentally.
C1 [Chantis, Athanasios N.; Smith, Darryl L.; Albers, Robert C.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   [Cardona, Manuel] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany.
   [Christensen, Niels E.; Svane, Axel] Univ Aarhus, Dept Phys & Astron, DK-8000 Aarhus, Denmark.
   [van Schilfgaarde, Mark; Kotani, Takao] Arizona State Univ, Sch Mat, Tempe, AZ 85287 USA.
RP Chantis, AN (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA.
RI Schaff, William/B-5839-2009; kotani, takao/G-4355-2011; 
OI kotani, takao/0000-0003-1693-7052; Chantis,
   Athanasios/0000-0001-7933-0579
FU DOE Office [08SCPE973]; ONR [N00014-07-1-0479]
FX The work at Los Alamos was supported by DOE Office of Basic Energy
   Sciences Work Proposal No. 08SCPE973. MA. and T.K. gratefully
   acknowledge support by ONR contract No. N00014-07-1-0479.
NR 34
TC 13
Z9 13
U1 1
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 AUG
PY 2008
VL 78
IS 7
AR 075208
DI 10.1103/PhysRevB.78.075208
PG 7
WC Physics, Condensed Matter
SC Physics
GA 351EG
UT WOS:000259406700055
ER

PT J
AU Chantis, AN
   Albers, RC
   Jones, MD
   van Schilfgaarde, M
   Kotani, T
AF Chantis, Athanasios N.
   Albers, R. C.
   Jones, M. D.
   van Schilfgaarde, Mark
   Kotani, Takao
TI Many-body electronic structure of metallic alpha-uranium
SO PHYSICAL REVIEW B
LA English
DT Article
ID GW APPROXIMATION; DELTA-PLUTONIUM; FERMIONS; VALENCE; PHYSICS; 5F
AB We present results for the electronic structure of a-uranium using a recently developed quasiparticle self-consistent GW (QSGW) method. This is the first time that the f-orbital electron-electron interactions in an actinide have been treated by a first-principles method beyond the level of the generalized gradient approximation (GGA) or the local-density approximation (LDA) to the density-functional theory (DFT). We show that the QSGW approximation predicts an f-level shift upward of about 0.5 eV with respect to the other metallic s-d states and that there is a significant f-band narrowing when compared to LDA band-structure results. We predict a considerable QSGW enhancement of the linear coefficient of specific heat. Nonetheless, because of the overall low f-electron occupation number in uranium, ground-state properties and the occupied band structure around the Fermi energy are not significantly affected. The correlations predominate in the unoccupied part of the f states. This provides the first formal justification for the success of LDA and GGA calculations in describing the ground-state properties of this material.
C1 [Chantis, Athanasios N.; Albers, R. C.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   [Jones, M. D.] SUNY Buffalo, Buffalo, NY 14260 USA.
   [van Schilfgaarde, Mark; Kotani, Takao] Arizona State Univ, Sch Mat, Tempe, AZ 85287 USA.
RP Chantis, AN (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RI kotani, takao/G-4355-2011; 
OI kotani, takao/0000-0003-1693-7052; Chantis,
   Athanasios/0000-0001-7933-0579
FU U.S. Department of Energy at Los Alamos National Laboratory
   [DE-AC52-06NA25396]; ONR [N00014-07-1-0479]; DOE [DE-FG02-06ER46302]
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. M.v.S. and
   T.K. acknowledge support from ONR (Contract No. N00014-07-1-0479) and by
   DOE (Contract No. DE-FG02-06ER46302) and would like to thank the Fulton
   HPC for computational resources used in this project. A.N.C. would like
   to thank Axel Svane for informative discussions.
NR 28
TC 27
Z9 27
U1 3
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 AUG
PY 2008
VL 78
IS 8
AR 081101
DI 10.1103/PhysRevB.78.081101
PG 4
WC Physics, Condensed Matter
SC Physics
GA 351EI
UT WOS:000259406900001
ER

PT J
AU Chen, Y
   Lynn, JW
   Li, J
   Li, G
   Chen, GF
   Luo, JL
   Wang, NL
   Dai, PC
   dela Cruz, C
   Mook, HA
AF Chen, Ying
   Lynn, J. W.
   Li, J.
   Li, G.
   Chen, G. F.
   Luo, J. L.
   Wang, N. L.
   Dai, Pengcheng
   dela Cruz, C.
   Mook, H. A.
TI Magnetic order of the iron spins in NdFeAsO
SO PHYSICAL REVIEW B
LA English
DT Article
ID 43 K; SUPERCONDUCTIVITY; LAO1-XFXFEAS; COMPOUND
AB Polarized and unpolarized neutron-diffraction measurements have been carried out to investigate the iron magnetic order in undoped NdFeAsO. Antiferromagnetic order is observed below [4](6) K, which is in close proximity to the structural distortion observed in this material. The magnetic structure consists of chains of parallel spins that are arranged antiparallel between chains, which is the same in-plane spin arrangement as observed in all the other iron oxypnictide materials. Nearest-neighbor spins along the c axis are antiparallel like LaFeAsO. The ordered moment is 0.25(7) mu(B), which is the smallest moment found so far in these systems.
C1 [Chen, Ying; Lynn, J. W.; Li, J.] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
   [Chen, Ying; Li, J.] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA.
   [Li, G.; Chen, G. F.; Luo, J. L.; Wang, N. L.] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
   [Dai, Pengcheng; dela Cruz, C.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
   [Dai, Pengcheng; dela Cruz, C.; Mook, H. A.] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
RP Chen, Y (reprint author), Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
RI Dai, Pengcheng /C-9171-2012; dela Cruz, Clarina/C-2747-2013; Li,
   Gang/E-3033-2015
OI Dai, Pengcheng /0000-0002-6088-3170; dela Cruz,
   Clarina/0000-0003-4233-2145; 
FU U.S. National Science Foundation [DMR-0756568]; U.S. Department of
   Energy [DE-FG02-05ER46202]; NSF of China; Chinese Academy of Sciences;
   Ministry of Science and Technology of China
FX We thank Qingzhen Huang and Yasutomo Uemura for helpful discussions.
   This work is supported in part by the U.S. National Science Foundation
   through Contract No. DMR-0756568 and by the Division of Materials
   Science, Basic Energy Sciences, U.S. Department of Energy through
   Contract No. DE-FG02-05ER46202. The work at the Institute of Physics,
   Chinese Academy of Sciences is supported by the NSF of China, the
   Chinese Academy of Sciences, and the Ministry of Science and Technology
   of China.
NR 51
TC 106
Z9 108
U1 1
U2 19
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 AUG
PY 2008
VL 78
IS 6
AR 064515
DI 10.1103/PhysRevB.78.064515
PG 5
WC Physics, Condensed Matter
SC Physics
GA 349EU
UT WOS:000259264900094
ER

PT J
AU d'Avezac, M
   Zunger, A
AF d'Avezac, Mayeul
   Zunger, Alex
TI Identifying the minimum-energy atomic configuration on a lattice:
   Lamarckian twist on Darwinian evolution
SO PHYSICAL REVIEW B
LA English
DT Article
ID COMPUTATIONAL-COMPLEXITY; GEOMETRY OPTIMIZATION; GENETIC ALGORITHMS;
   SOLID-SOLUTIONS; PHASE-DIAGRAMS; MONTE-CARLO; III-V; STABILITY;
   SEMICONDUCTORS; NANOPARTICLES
AB We examine how the two different mechanisms proposed historically for biological evolution compare for the determination of crystal structures from random initial lattice configurations. The Darwinian theory of evolution contends that the genetic makeup inherited at birth is the one passed on during mating to new offspring, in which case evolution is a product of environmental pressure and chance. In addition to this mechanism, Lamarck surmised that individuals can also pass on traits acquired during their lifetime. Here we show that the minimum-energy configurations of a binary A(1-x)B(x) alloy in the full 0 <= x <= 1 concentration range can be found much faster if the conventional Darwinian genetic progression-mating configurations and letting the lowest-energy (fittest) offspring survive-is allowed to experience Lamarckian-style fitness improvements during its lifetime. Such improvements consist of A <-> B transmutations of some atomic sites (not just atomic relaxations) guided by "virtual-atom" energy gradients. This hybrid evolution is shown to provide an efficient solution to a generalized Ising Hamiltonian, illustrated here by finding the ground states of face-centered-cubic Au(1-x)Pd(x) using a cluster-expansion functional fitted to first-principles total energies. The statistical rate of success of the search strategies and their practical applicability are rigorously documented in terms of average number of evaluations required to find the solution out of 400 independent evolutionary runs with different random seeds. We show that all exact ground states of a 12-atom supercell (2(12) configurations) can be found within 330 total-energy evaluations, whereas a 36-atom supercell (2(36) configurations) requires on average 39 000 evaluations. Thus, this problem cannot be currently addressed with confidence using costly energy functionals [e.g., density-functional theory (DFT) based] unless it is limited to <= 20 atoms. The computational cost can be reduced at the expense of accuracy: Searching for all approximate-minimum-energy configurations (within 3 meV) of a 12- or 36-atom supercell requires on average 30 or 580 total-energy evaluations, respectively. Thus it could be addressed even by costly energy functionals such as density-functional theory.
C1 [d'Avezac, Mayeul; Zunger, Alex] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP d'Avezac, M (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM mayeul_davezac@nrel.gov; alex_zunger@nrel.gov
RI Zunger, Alex/A-6733-2013; 
OI d'Avezac, Mayeul/0000-0002-2615-8397
NR 59
TC 18
Z9 18
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 AUG
PY 2008
VL 78
IS 6
AR 064102
DI 10.1103/PhysRevB.78.064102
PG 15
WC Physics, Condensed Matter
SC Physics
GA 349EU
UT WOS:000259264900017
ER

PT J
AU Dong, S
   Yu, R
   Yunoki, S
   Liu, JM
   Dagotto, E
AF Dong, Shuai
   Yu, Rong
   Yunoki, Seiji
   Liu, J. -M.
   Dagotto, Elbio
TI Ferromagnetic tendency at the surface of CE-type charge-ordered
   manganites
SO PHYSICAL REVIEW B
LA English
DT Article
ID DOUBLE-EXCHANGE MODEL; MAGNETIC-PROPERTIES; DOPED MANGANITES;
   PHASE-DIAGRAM; LOW-TEMPERATURE; STATES; LA2/3SR1/3MNO3; NANOPARTICLES
AB Most previous investigations have shown that the surface of a ferromagnetic material may have antiferromagnetic tendencies. However, experimentally, the opposite effect has been recently observed-ferromagnetism appears in some nanosized manganites with a composition such that the antiferromagnetic charge-ordered CE state is observed in the bulk. A possible origin is the development of ferromagnetic correlations at the surface of these small systems. To clarify these puzzling experimental observations, we have studied the two-orbital double-exchange model near half doping, n = 0.5, using open boundary conditions to simulate the surface of either bulk or nanosized manganites. Considering the enhancement of surface charge density due to a possible AO termination (A = trivalent/divalent ion composite, O = oxygen), an unexpected surface phase-separated state emerges when the model is studied using Monte Carlo techniques on small clusters. This tendency suppresses the CE charge ordering and produces a weak ferromagnetic signal that could explain the experimental observations.
C1 [Dong, Shuai; Yu, Rong; Yunoki, Seiji; Dagotto, Elbio] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
   [Dong, Shuai; Yu, Rong; Yunoki, Seiji; Dagotto, Elbio] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
   [Dong, Shuai; Liu, J. -M.] Nanjing Univ, Nanjing Natl Lab Microstruct, Nanjing 210093, Peoples R China.
   [Liu, J. -M.] Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China.
RP Dong, S (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RI YU, RONG/C-1506-2012; Yunoki, Seiji/B-1831-2008; Yu, Rong/K-5854-2012;
   Dong (董), Shuai (帅)/A-5513-2008; Yu, Rong/H-3355-2016
OI Dong (董), Shuai (帅)/0000-0002-6910-6319; 
FU NSF [DMR-0706020]; Division of Materials Science and Engineering; U.S.
   DOE; National Key Projects for Basic Research of China [2006CB921802];
   Natural Science Foundation of China [50601013]; China Scholarship
   Council; Scientific Research Foundation
FX We thank W. Plummer, M. J. Calderon, S. V. Bhat, and A. Biswas for
   useful comments. This work was supported by the NSF under Grant No.
   DMR-0706020 and by the Division of Materials Science and Engineering,
   U.S. DOE under contract with UT-Battelle, LLC. S.D. and J.M.L were
   supported by the National Key Projects for Basic Research of China
   (Grant No. 2006CB921802) and Natural Science Foundation of China (Grant
   No. 50601013). S.D. was also supported by the China Scholarship Council
   and the Scientific Research Foundation of the Graduate School of Nanjing
   University.
NR 45
TC 96
Z9 96
U1 1
U2 19
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 AUG
PY 2008
VL 78
IS 6
AR 064414
DI 10.1103/PhysRevB.78.064414
PG 7
WC Physics, Condensed Matter
SC Physics
GA 349EU
UT WOS:000259264900063
ER

PT J
AU Franceschetti, A
AF Franceschetti, A.
TI Structural and electronic properties of PbSe nanocrystals from first
   principles
SO PHYSICAL REVIEW B
LA English
DT Article
ID MULTIPLE EXCITON GENERATION; QUANTUM DOTS; CARRIER MULTIPLICATION;
   COLLOIDAL PBSE; SILICON NANOCRYSTALS; OPTICAL-PROPERTIES;
   SEMICONDUCTORS; SIZE; PBTE; RELAXATION
AB This work reports density-functional calculations of the structural and electronic properties of PbSe nanocrystals ranging in radius from 8.4 to 14.8 angstrom. We considered nearly spherical, rocksalt-structure nanocrystals with 1:1 Pb:Se stoichiometry and no molecular species adsorbed at the surface. We found that: (i) The Pb-Se bond lengths and bond angles are significantly distorted compared to those in bulk PbSe, in an similar to 8-angstrom-thick shell near the surface of the nanocrystal. (ii) Even in the absence of surface passivants, there are no surface states in the band gap of the nanocrystals. (iii) The nanocrystal band gap undergoes a significant redshift (Franck-Condon shift) when an electron is promoted from the valence band to the conduction band. For nanocrystals of radius R=8.4 angstrom, the calculated Franck-Condon shift is similar to 0.18 eV. (iv) The calculated electronic density of states shows a significant asymmetry between valence and conduction states, suggesting that the postulated "mirror symmetry" between valence band and conduction band does not exist.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Franceschetti, A (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
NR 57
TC 50
Z9 50
U1 1
U2 34
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 AUG
PY 2008
VL 78
IS 7
AR 075418
DI 10.1103/PhysRevB.78.075418
PG 6
WC Physics, Condensed Matter
SC Physics
GA 351EG
UT WOS:000259406700099
ER

PT J
AU Fritz, L
   Schmalian, J
   Muller, M
   Sachdev, S
AF Fritz, Lars
   Schmalian, Joerg
   Mueller, Markus
   Sachdev, Subir
TI Quantum critical transport in clean graphene
SO PHYSICAL REVIEW B
LA English
DT Article
ID NONZERO-TEMPERATURE TRANSPORT; FERMI-LIQUID BEHAVIOR; HALL
   CRITICAL-POINTS
AB We describe electrical transport in ideal single-layer graphene at zero applied gate voltage. There is a crossover from collisionless transport at frequencies larger than k(B)T/(h) over bar (T is the temperature) to collision-dominated transport at lower frequencies. The dc conductivity is computed by the solution of a quantum Boltzmann equation. Due to a logarithmic singularity in the collinear scattering amplitude (a consequence of relativistic dispersion in two dimensions), quasiparticles and quasiholes moving in the same direction tend to an effective equilibrium distribution whose parameters depend on the direction of motion. This property allows us to find the nonequilibrium distribution functions and the quantum critical conductivity exactly to leading order in 1/vertical bar ln(alpha)vertical bar, where alpha is the coupling constant characterizing the Coulomb interactions.
C1 [Fritz, Lars; Mueller, Markus; Sachdev, Subir] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
   [Schmalian, Joerg] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
   [Schmalian, Joerg] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
RP Fritz, L (reprint author), Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
RI Fritz, Lars/F-2934-2010; Schmalian, Joerg/H-2313-2011; Fritz,
   Lars/K-8722-2013; Muller, Markus/L-5058-2013; Sachdev, Subir/A-8781-2013
OI Muller, Markus/0000-0002-0299-952X; Sachdev, Subir/0000-0002-2432-7070
NR 24
TC 129
Z9 129
U1 1
U2 20
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 AUG
PY 2008
VL 78
IS 8
AR 085416
DI 10.1103/PhysRevB.78.085416
PG 12
WC Physics, Condensed Matter
SC Physics
GA 351EI
UT WOS:000259406900098
ER

PT J
AU Fujita, K
   Grigorenko, I
   Lee, J
   Wang, W
   Zhu, JX
   Davis, JC
   Eisaki, H
   Uchida, S
   Balatsky, AV
AF Fujita, K.
   Grigorenko, Ilya
   Lee, J.
   Wang, W.
   Zhu, Jian Xin
   Davis, J. C.
   Eisaki, H.
   Uchida, S.
   Balatsky, Alexander V.
TI Bogoliubov angle and visualization of particle-hole mixture in
   superconductors
SO PHYSICAL REVIEW B
LA English
DT Article
ID MAGNETIC-IMPURITIES; SUPERFLUID DENSITY; BI2SR2CACU2O8+DELTA; STATES;
   TEMPERATURE; INTERFERENCE; EXCITATIONS; WAVES; PROBE
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 contents of such a superconducting excitation. Recent STM experiments offer unique insight into the inner workings of the superconducting state of superconductors. We propose an observable quantity for STM studies that is a 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 amplitudes in the superconducting (Bogoliubov) quasiparticle. We argue that this quantity can be measured locally by comparing the ratios of tunneling currents at positive and negative biases. This Bogoliubov angle allows one to measure directly the energy and position dependent particle-hole admixtures 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.
C1 [Fujita, K.; Lee, J.; Wang, W.; Davis, J. C.] Cornell Univ, Dept Phys, LASSP, Ithaca, NY 14853 USA.
   [Grigorenko, Ilya] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Ctr Nonlinear Studies, Theoret Div T 11, Los Alamos, NM 87545 USA.
   [Zhu, Jian Xin] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 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.
   [Balatsky, Alexander V.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   [Balatsky, Alexander V.] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA.
RP Fujita, K (reprint author), Cornell Univ, Dept Phys, LASSP, Ithaca, NY 14853 USA.
RI Grigorenko, Ilya/B-5616-2009; 
OI Zhu, Jianxin/0000-0001-7991-3918
NR 35
TC 19
Z9 19
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 AUG
PY 2008
VL 78
IS 5
AR 054510
DI 10.1103/PhysRevB.78.054510
PG 13
WC Physics, Condensed Matter
SC Physics
GA 350QM
UT WOS:000259368200114
ER

PT J
AU Giustino, F
   Pasquarello, A
AF Giustino, Feliciano
   Pasquarello, Alfredo
TI First-principles theory of infrared absorption spectra at surfaces and
   interfaces: Application to the Si(100): H(2)O surface
SO PHYSICAL REVIEW B
LA English
DT Article
ID FUNCTIONAL PERTURBATION-THEORY; SCANNING-TUNNELING-MICROSCOPY;
   MOLECULAR-DYNAMICS; WATER-ADSORPTION; ELECTRON SYSTEMS; H2O ADSORPTION;
   SILICON; PSEUDOPOTENTIALS; SPECTROSCOPY; CONSTANTS
AB We calculate the transverse and the longitudinal infrared absorption spectra of the hydrated silicon surface using a first-principles approach. The absorption spectra are computed for two different configurations of water molecules dissociatively chemisorbed on the Si(100)-(2 X 1) surface at full coverage. Our calculations compare favorably with the experimental spectra for both the frequency and the intensity of the absorption peaks. Our results suggest the possibility of combining infrared spectroscopy and first-principles theoretical modeling to investigate the phase diagram of the Si(100): H(2)O surface and similar systems. We also provide a detailed discussion of the underlying formalism, already introduced by Giustino and Pasquarello [Phys. Rev. Lett. 95, 187402 (2005)]. The methods described here are of general validity and provide a basis for the theoretical modeling of infrared spectroscopy at surfaces and interfaces.
C1 [Giustino, Feliciano] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   [Giustino, Feliciano] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   [Pasquarello, Alfredo] Inst Theoret Phys, CH-1015 Lausanne, Switzerland.
   [Pasquarello, Alfredo] Ecole Polytech Fed Lausanne, Inst Romand Rech Numer Phys Mat, IRRMA, CH-1015 Lausanne, Switzerland.
RP Giustino, F (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RI Pasquarello, Alfredo/G-2883-2011; Giustino, Feliciano/F-6343-2013; 
OI Giustino, Feliciano/0000-0001-9293-1176
NR 51
TC 5
Z9 5
U1 1
U2 12
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD AUG
PY 2008
VL 78
IS 7
AR 075307
DI 10.1103/PhysRevB.78.075307
PG 11
WC Physics, Condensed Matter
SC Physics
GA 351EG
UT WOS:000259406700065
ER

PT J
AU Goddard, PA
   Singleton, J
   Maitland, C
   Blundell, SJ
   Lancaster, T
   Baker, PJ
   McDonald, RD
   Cox, S
   Sengupta, P
   Manson, JL
   Funk, KA
   Schlueter, JA
AF Goddard, P. A.
   Singleton, J.
   Maitland, C.
   Blundell, S. J.
   Lancaster, T.
   Baker, P. J.
   McDonald, R. D.
   Cox, S.
   Sengupta, P.
   Manson, J. L.
   Funk, K. A.
   Schlueter, J. A.
TI Isotope effect in quasi-two-dimensional metal-organic antiferromagnets
SO PHYSICAL REVIEW B
LA English
DT Article
ID FLUCTUATION-INDUCED SUPERCONDUCTIVITY; ELECTRON-PHONON INTERACTION;
   MAGNETIC-BEHAVIOR; T-C; OXIDES; TEMPERATURE; 2D
AB Although the isotope effect in superconducting materials is well documented, changes in the magnetic properties of antiferromagnets due to isotopic substitution are seldom discussed and remain poorly understood. This is perhaps surprising given the possible link between the quasi-two-dimensional (Q2D) anti ferromagnetic and superconducting phases of the layered cuprates. Here we report the experimental observation of shifts in the Neel temperature and critical magnetic fields (Delta T(N)/T(N)approximate to 4%; Delta B(c)/B(c)approximate to 4%) in a Q2D organic molecular antiferromagnet on substitution of hydrogen for deuterium. These compounds are characterized by strong hydrogen bonds through which the dominant superexchange is mediated. We evaluate how the in-plane and interplane exchange energies evolve as the atoms of hydrogen on different ligands are substituted, and suggest a possible mechanism for this effect in terms of the relative exchange efficiency of hydrogen and deuterium bonds.
C1 [Goddard, P. A.; Maitland, C.; Blundell, S. J.; Lancaster, T.; Baker, P. J.] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England.
   [Singleton, J.; McDonald, R. D.; Cox, S.; Sengupta, P.] Los Alamos Natl Lab, Nat High Magnet Field Lab, Los Alamos, NM 87545 USA.
   [Sengupta, P.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   [Manson, J. L.] Eastern Washington Univ, Dept Chem & Biochem, Cheney, WA 99004 USA.
   [Funk, K. A.; Schlueter, J. A.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Goddard, PA (reprint author), Univ Oxford, Dept Phys, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England.
EM p.goddard1@physics.ox.ax.uk
RI Baker, Peter/E-4216-2010; McDonald, Ross/H-3783-2013; Goddard,
   Paul/A-8638-2015; Sengupta, Pinaki/B-6999-2011; 
OI Baker, Peter/0000-0002-2306-2648; McDonald, Ross/0000-0002-0188-1087;
   Goddard, Paul/0000-0002-0666-5236; Mcdonald, Ross/0000-0002-5819-4739
FU Office of Basic Energy Sciences, DoE [DE-AC02-06CH11357]; Research
   Corporation. T.L.; Royal Commission for the Exhibition of 1851;
   Glasstone Foundation; Seaborg Institute
FX Work at NHMFL occurs under the auspices of the National Science
   Foundation, the State of Florida, and the U.S. Department of Energy
   (DoE) program "Science at 100 T." Work at ANL is supported by the Office
   of Basic Energy Sciences, DoE (Contract No. DE-AC02-06CH11357). Work at
   EWU was supported by the Research Corporation. T.L., P.A.G., and S.C.
   acknowledge support from the Royal Commission for the Exhibition of
   1851, the Glasstone Foundation, and the Seaborg Institute, respectively.
   J.S. thanks the University of Oxford for the provision of a Visiting
   Professorship and P.A.G. thanks the Oxford Magnet Group for technical
   assistance.
NR 30
TC 16
Z9 16
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 AUG
PY 2008
VL 78
IS 5
AR 052408
DI 10.1103/PhysRevB.78.052408
PG 4
WC Physics, Condensed Matter
SC Physics
GA 350QM
UT WOS:000259368200015
ER

PT J
AU Hennig, RG
   Lenosky, TJ
   Trinkle, DR
   Rudin, SP
   Wilkins, JW
AF Hennig, R. G.
   Lenosky, T. J.
   Trinkle, D. R.
   Rudin, S. P.
   Wilkins, J. W.
TI Classical potential describes martensitic phase transformations between
   the alpha, beta, and omega titanium phases
SO PHYSICAL REVIEW B
LA English
DT Article
ID EMBEDDED-ATOM-METHOD; ATOMISTIC SIMULATION; ZIRCONIUM; SILICON; TI;
   PRESSURE; DYNAMICS; METALS; INSTABILITIES; DISLOCATIONS
AB A description of the martensitic transformations between the alpha, beta, and omega phases of titanium that includes nucleation and growth requires an accurate classical potential. Optimization of the parameters of a modified embedded atom potential to a database of density-functional calculations yields an accurate and transferable potential as verified by comparison to experimental and density-functional data for phonons, surface and stacking fault energies, and energy barriers for homogeneous martensitic transformations. Molecular-dynamics simulations map out the pressure-temperature phase diagram of titanium. For this potential the martensitic phase transformation between a and 8 appears at ambient pressure and 1200 K, between alpha and omega at ambient conditions, between beta and omega at 1200 K and pressures above 8 GPa, and the triple point occurs at 8 GPa and 1200 K. Molecular-dynamics explorations of the kinetics of the martensitic alpha-omega transformation show a fast moving interface with a low interfacial energy of 30 meV/angstrom(2). The potential is applicable to the study of defects and phase transformations of Ti.
C1 [Hennig, R. G.] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA.
   [Hennig, R. G.; Trinkle, D. R.; Wilkins, J. W.] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
   [Lenosky, T. J.] C8 Medisensors, San Jose, CA 95124 USA.
   [Trinkle, D. R.] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA.
   [Rudin, S. P.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Hennig, RG (reprint author), Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA.
RI Trinkle, Dallas/E-6609-2010; Hennig, Richard/A-2978-2008
OI Hennig, Richard/0000-0003-4933-7686
FU DOE [DE-FG02-99ER45795, W-7405-ENG-36]; NSF [DMR-0706507]; Ohio
   Supercomputing Center; NCSA; NERSC; PNL
FX This research was supported by DOE Grant No. DE-FG02-99ER45795 and under
   Contract No. W-7405-ENG-36 and by NSF Grant No. DMR-0706507.
   Computational resources were provided by the Ohio Supercomputing Center,
   NCSA, NERSC, and PNL.
NR 60
TC 54
Z9 55
U1 4
U2 61
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 AUG
PY 2008
VL 78
IS 5
AR 054121
DI 10.1103/PhysRevB.78.054121
PG 10
WC Physics, Condensed Matter
SC Physics
GA 350QM
UT WOS:000259368200047
ER

PT J
AU Higuchi, T
   Liu, YS
   Yao, P
   Glans, PA
   Guo, JH
   Chang, CL
   Wu, ZY
   Sakamoto, W
   Itoh, N
   Shimura, T
   Yogo, T
   Hattori, T
AF Higuchi, Tohru
   Liu, Yi-Sheng
   Yao, Peng
   Glans, Per-Anders
   Guo, Jinghua
   Chang, Chinglin
   Wu, Ziyu
   Sakamoto, Wataru
   Itoh, Naoyuki
   Shimura, Tetsuo
   Yogo, Toshinobu
   Hattori, Takeshi
TI Electronic structure of multiferroic BiFeO(3) by resonant soft x-ray
   emission spectroscopy
SO PHYSICAL REVIEW B
LA English
DT Article
ID THIN-FILMS; FERROELECTRIC POLARIZATION; FLUORESCENCE SPECTROSCOPY;
   ROOM-TEMPERATURE; CRYSTAL; EXCITATIONS; ABSORPTION; ENERGY
AB The electronic structure of multiferroic BiFeO(3) has been studied using soft x-ray emission spectroscopy. The fluorescence spectra exhibit that the valence band is mainly composed of O 2p state hybridized with Fe 3d state. The band gap corresponding to the energy separation between the top of the 0 2p valence band and the bottom of the Fe 3d conduction band is 1.3 eV. The soft x-ray Raman scattering reflects the features due to the charge-transfer transition from O 2p valence band to Fe 3d conduction band. These findings are similar to the result of electronic structure calculation by density-functional theory within the local spin-density approximation that included the effect of Coulomb repulsion between localized d states.
C1 [Higuchi, Tohru; Liu, Yi-Sheng; Yao, Peng; Glans, Per-Anders; Guo, Jinghua] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
   [Higuchi, Tohru] Tokyo Univ Sci, Dept Appl Phys, Shinjuku Ku, Tokyo 1628601, Japan.
   [Chang, Chinglin] Tamkang Univ, Dept Phys, Tamsui 251, Taiwan.
   [Wu, Ziyu] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China.
   [Sakamoto, Wataru; Itoh, Naoyuki; Shimura, Tetsuo; Yogo, Toshinobu] Nagoya Univ, EcoTopia Sci Inst, Nagoya, Aichi 4648603, Japan.
RP Higuchi, T (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
EM higuchi@rs.kagu.tus.ac.jp
RI Higuchi, Tohru/C-6544-2012; Glans, Per-Anders/G-8674-2016; 
OI Chang, Ching-Lin/0000-0001-8547-371X
NR 37
TC 41
Z9 41
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 AUG
PY 2008
VL 78
IS 8
AR 085106
DI 10.1103/PhysRevB.78.085106
PG 5
WC Physics, Condensed Matter
SC Physics
GA 351EI
UT WOS:000259406900019
ER

PT J
AU Hu, WZ
   Wang, GT
   Hu, RW
   Petrovic, C
   Morosan, E
   Cava, RJ
   Fang, Z
   Wang, NL
AF Hu, W. Z.
   Wang, G. T.
   Hu, Rongwei
   Petrovic, C.
   Morosan, E.
   Cava, R. J.
   Fang, Z.
   Wang, N. L.
TI Evidence for a band broadening across the ferromagnetic transition of
   Cr1/3NbSe2
SO PHYSICAL REVIEW B
LA English
DT Article
ID TANTALUM DICHALCOGENIDES; TRANSPORT-PROPERTIES; MAGNETIC-PROPERTIES;
   NIOBIUM
AB The electronic structure of Cr1/3NbSe2 is studied via optical spectroscopy. We observe two low-energy interband transitions in the paramagnetic phase, which split into four peaks as the compound enters the ferromagnetic state. The band structure calculation indicates the four peaks are interband transitions to the spin up Cr e(g) states. We show that the peak splitting below the Curie temperature is not due to the exchange splitting of spin-up and spin-down bands, but directly reflects a band broadening effect in Cr-derived states upon the spontaneous ferromagnetic ordering.
C1 [Hu, W. Z.; Wang, G. T.; Fang, Z.; Wang, N. L.] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100080, Peoples R China.
   [Hu, Rongwei; Petrovic, C.] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
   [Hu, Rongwei] Brown Univ, Dept Phys, Providence, RI 02912 USA.
   [Morosan, E.; Cava, R. J.] Princeton Univ, Dept Chem, Princeton, NJ 08540 USA.
RP Hu, WZ (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100080, Peoples R China.
EM nlwang@aphy.iphy.ac.cn
RI Petrovic, Cedomir/A-8789-2009; Hu, Rongwei/E-7128-2012; Fang,
   Zhong/D-4132-2009; Hu, Wanzheng/K-1171-2016
OI Petrovic, Cedomir/0000-0001-6063-1881; 
FU National Science Foundation of China; Chinese Academy of Sciences;
   Ministry of Science and Technology of China; U.S. Department of Energy
   by Brookhaven Science Associates [DE-Ac02-98CH10886]; National Science
   Foundation of the USA
FX This work is supported by the National Science Foundation of China, the
   Knowledge Innovation Project of the Chinese Academy of Sciences, and the
   973 project of the Ministry of Science and Technology of China. The work
   at Brookhaven National Laboratory is operated for the U.S. Department of
   Energy by Brookhaven Science Associates (Grant No. DE-Ac02-98CH10886),
   and at Princeton by the National Science Foundation of the USA.
NR 21
TC 9
Z9 9
U1 1
U2 11
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 AUG
PY 2008
VL 78
IS 8
AR 085120
DI 10.1103/PhysRevB.78.085120
PG 6
WC Physics, Condensed Matter
SC Physics
GA 351EI
UT WOS:000259406900033
ER

PT J
AU Huang, Q
   Zhao, J
   Lynn, JW
   Chen, GF
   Luo, JL
   Wang, NL
   Dai, PC
AF Huang, Q.
   Zhao, Jun
   Lynn, J. W.
   Chen, G. F.
   Luo, J. L.
   Wang, N. L.
   Dai, Pengcheng
TI Doping evolution of antiferromagnetic order and structural distortion in
   LaFeAsO1-xFx
SO PHYSICAL REVIEW B
LA English
DT Article
ID SUPERCONDUCTIVITY
AB We use neutron scattering to study the structural distortion and antiferromagnetic (AFM) order in LaFeAsO1-xFx as the system is doped with fluorine (F) to induce superconductivity. In the undoped state, LaFeAsO exhibits a structural distortion, changing the symmetry from tetragonal (space group P4/nmm) to orthorhombic (space group Cmma) at 155 K, and then followed by an AFM order at 137 K. Doping the system with F gradually decreases the structural distortion temperature, but suppresses the long range AFM order before the emergence of superconductivity. Therefore, while superconductivity in these Fe oxypnictides can survive in either the tetragonal or the orthorhombic crystal structure, it competes directly with static AFM order.
C1 [Huang, Q.; Lynn, J. W.] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA.
   [Chen, G. F.; Luo, J. L.; Wang, N. L.] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100080, Peoples R China.
   [Dai, Pengcheng] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
   [Zhao, Jun; Dai, Pengcheng] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RP Huang, Q (reprint author), Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA.
EM daip@ornl.gov
RI Zhao, Jun/A-2492-2010; Dai, Pengcheng /C-9171-2012
OI Zhao, Jun/0000-0002-0421-8934; Dai, Pengcheng /0000-0002-6088-3170
FU U.S. NSF [DMR-0756568]; U.S. DOE, Division of Materials Science, Basic
   Energy Sciences [DE-FG02-05ER46202]; U.S. DOE, Division of Scientific
   User Facilities, Basic Energy Sciences; NSF of China; Chinese Academy of
   Sciences and the Ministry of Science and Technology of China
FX This work is supported by the U.S. NSF through Grant No. DMR-0756568, by
   the U.S. DOE, Division of Materials Science, Basic Energy Sciences,
   through DOE Grant No. DE-FG02-05ER46202. This work is also supported in
   part by the U.S. DOE, Division of Scientific User Facilities, Basic
   Energy Sciences. The work at the Institute of Physics, Chinese Academy
   of Sciences, is supported by the NSF of China, the Chinese Academy of
   Sciences and the Ministry of Science and Technology of China.
NR 22
TC 85
Z9 85
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 AUG
PY 2008
VL 78
IS 5
AR 054529
DI 10.1103/PhysRevB.78.054529
PG 6
WC Physics, Condensed Matter
SC Physics
GA 350QM
UT WOS:000259368200133
ER

PT J
AU Jaroszynski, J
   Riggs, SC
   Hunte, F
   Gurevich, A
   Larbalestier, DC
   Boebinger, GS
   Balakirev, FF
   Migliori, A
   Ren, ZA
   Lu, W
   Yang, J
   Shen, XL
   Dong, XL
   Zhao, ZX
   Jin, R
   Sefat, AS
   McGuire, MA
   Sales, BC
   Christen, DK
   Mandrus, D
AF Jaroszynski, J.
   Riggs, Scott C.
   Hunte, F.
   Gurevich, A.
   Larbalestier, D. C.
   Boebinger, G. S.
   Balakirev, F. F.
   Migliori, Albert
   Ren, Z. A.
   Lu, W.
   Yang, J.
   Shen, X. L.
   Dong, X. L.
   Zhao, Z. X.
   Jin, R.
   Sefat, A. S.
   McGuire, M. A.
   Sales, B. C.
   Christen, D. K.
   Mandrus, D.
TI Comparative high-field magnetotransport of the oxypnictide
   superconductors RFeAsO1-xFx (R=La, Nd) and SmFeAsO1-delta
SO PHYSICAL REVIEW B
LA English
DT Article
ID LAYERED QUATERNARY COMPOUND; LAO1-XFXFEAS; ORDER
AB We compare magnetotransport of the three iron-arsenide-based compounds ReFeAsO (Re=La, Sm, Nd) in very high DC and pulsed magnetic fields up to 45 and 54 T, respectively. Each sample studied exhibits a superconducting transition temperature near the maximum reported to date for that particular compound. While high magnetic fields do not suppress the superconducting state appreciably, the resistivity, Hall coefficient. and critical magnetic fields, taken together, suggest that the phenomenology and superconducting parameters of the oxypnictide superconductors bridges the gap between MgB2 and YBCO.
C1 [Jaroszynski, J.; Riggs, Scott C.; Hunte, F.; Gurevich, A.; Larbalestier, D. C.; Boebinger, G. S.] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
   [Balakirev, F. F.; Migliori, Albert] Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA.
   [Ren, Z. A.; Lu, W.; Yang, J.; Shen, X. L.; Dong, X. L.; Zhao, Z. X.] Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China.
   [Ren, Z. A.; Lu, W.; Yang, J.; Shen, X. L.; Dong, X. L.; Zhao, Z. X.] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
   [Jin, R.; Sefat, A. S.; McGuire, M. A.; Sales, B. C.; Christen, D. K.; Mandrus, D.] Oak Ridge Natl Lab, Div Mat Sci, Oak Ridge, TN 37831 USA.
RP Jaroszynski, J (reprint author), Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
RI Gurevich, Alex/A-4327-2008; McGuire, Michael/B-5453-2009; yang,
   jie/F-4389-2012; Ren, Zhi An/C-1421-2009; Mandrus, David/H-3090-2014;
   Larbalestier, David/B-2277-2008; Sefat, Athena/R-5457-2016
OI Gurevich, Alex/0000-0003-0759-8941; McGuire,
   Michael/0000-0003-1762-9406; yang, jie/0000-0002-5549-6926;
   Larbalestier, David/0000-0001-7098-7208; Sefat,
   Athena/0000-0002-5596-3504
FU NSF [DMR-0084173]; DOE; NHMFL IHRP program (FH); AFOSR
   [FA9550-06-1-0474]; Division of Materials Science and Engineering;
   Office of Basic Energy Sciences
FX The work at NHMFL was supported by the NSF Cooperative Agreement No.
   DMR-0084173, by the State of Florida, by the DOE, by the NHMFL IHRP
   program (FH), and by AFOSR Grant No. FA9550-06-1-0474 (AG and DCL). Work
   at ORNL was supported by the Division of Materials Science and
   Engineering, Office of Basic Energy Sciences.
NR 37
TC 89
Z9 89
U1 2
U2 16
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD AUG
PY 2008
VL 78
IS 6
AR 064511
DI 10.1103/PhysRevB.78.064511
PG 5
WC Physics, Condensed Matter
SC Physics
GA 349EU
UT WOS:000259264900090
ER

PT J
AU Jiang, C
AF Jiang, C.
TI Vacancy ordering in Co(3)AlC(x) alloys: A first-principles study
SO PHYSICAL REVIEW B
LA English
DT Article
ID HEAT-RESISTANT ALLOYS; TRANSITION-METAL; SYSTEMS
AB Ordering of structural vacancies in nonstoichiometric Co(3)AlC(x) alloys has been studied using a combination of first-principles total-energy calculations, a cluster expansion technique, and Monte Carlo simulations. In the proximity of the experimentally observed composition of x similar to 0.59, our exhaustive ground-state search yields two stable vacancy-ordered structures: a cubic Co(3)AlC(0.5) phase and a trigonal Co(3)AlC(0.667) phase. By performing finite-temperature Monte Carlo simulations, the order-disorder transition temperatures of Co(3)AlC(0.5) and Co(3)AlC(0.667) are predicted to be similar to 1925 and similar to 1630 K, respectively.
C1 Los Alamos Natl Lab, Struct Property Relat Grp MST 8, Los Alamos, NM 87545 USA.
RP Jiang, C (reprint author), Los Alamos Natl Lab, Struct Property Relat Grp MST 8, POB 1663, Los Alamos, NM 87545 USA.
EM chao@lanl.gov
RI Jiang, Chao/A-2546-2011; Jiang, Chao/D-1957-2017
OI Jiang, Chao/0000-0003-0610-6327
FU Los Alamos National Laboratory (LANL)
FX The author wishes to thank Axel van de Walle for providing ATAT software
   package. This work is financially supported by Director's postdoctoral
   program at Los Alamos National Laboratory (LANL). All calculations were
   performed using the parallel computing facilities at LANL.
NR 20
TC 4
Z9 4
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 AUG
PY 2008
VL 78
IS 6
AR 064206
DI 10.1103/PhysRevB.78.064206
PG 6
WC Physics, Condensed Matter
SC Physics
GA 349EU
UT WOS:000259264900038
ER

PT J
AU Kim, G
   Jhi, SH
   Park, N
   Louie, SG
   Cohen, ML
AF Kim, Gyubong
   Jhi, Seung-Hoon
   Park, Noejung
   Louie, Steven G.
   Cohen, Marvin L.
TI Optimization of metal dispersion in doped graphitic materials for
   hydrogen storage
SO PHYSICAL REVIEW B
LA English
DT Article
ID MOLECULAR-HYDROGEN; GRAPHENES; BINDING; ENERGY
AB The noncovalent hydrogen binding on transition-metal atoms dispersed on carbon clusters and graphene is studied with the use of the pseudopotential density-functional method. It is found that the presence of acceptorlike states in the absorbents is essential for enhancing the metal adsorption strength and for increasing the number of hydrogen molecules attached to the metal atoms. Particular configurations of boron substitutional doping are found to be very efficient for providing such states and thus enhancing storage capacity. Optimal doping conditions are suggested based on our calculations for the binding energy and ratio between metal and hydrogen molecules.
C1 [Kim, Gyubong; Jhi, Seung-Hoon] Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea.
   [Park, Noejung] Dankook Univ, Dept Appl Phys, Yongin 448701, Gyeonggido, South Korea.
   [Louie, Steven G.; Cohen, Marvin L.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   [Louie, Steven G.; Cohen, Marvin L.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Jhi, SH (reprint author), Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea.
RI Park, Noejung/G-2017-2011
FU Korean Ministry of Science and Technology; NSF [DMR04-39768]; Office of
   Science, Office of Basic Energy Sciences; Division of Materials Sciences
   and Engineering Division; U.S. Department of Energy [DE-AC02-05CH11231]
FX This research was performed for the Hydrogen Energy R&D Center, one of
   the 21st Century Frontier R&D Programs, funded by the Korean Ministry of
   Science and Technology, and was supported in part by NSF Grant No.
   DMR04-39768 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.
NR 26
TC 90
Z9 90
U1 1
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 AUG
PY 2008
VL 78
IS 8
AR 085408
DI 10.1103/PhysRevB.78.085408
PG 5
WC Physics, Condensed Matter
SC Physics
GA 351EI
UT WOS:000259406900090
ER

PT J
AU Kocharian, AN
   Fernando, GW
   Palandage, K
   Davenport, JW
AF Kocharian, A. N.
   Fernando, G. W.
   Palandage, K.
   Davenport, J. W.
TI Coherent and incoherent pairing instabilities and spin-charge separation
   in bipartite and nonbipartite nanoclusters: Exact results
SO PHYSICAL REVIEW B
LA English
DT Article
ID HUBBARD-MODEL; THERMODYNAMICS; FERMIONS; LATTICE; BAND
AB Electron pairing and formation of various types of magnetic correlations for ensembles of small clusters of different geometries are studied with emphasis on tetrahedrons and square pyramids under variation of interaction strength, electron doping and temperature. These exact calculations of charge and spin collective excitations and pseudogaps yield intriguing insights into level crossing degeneracies, phase separation and condensation. Obtained coherent and incoherent pairings provide a route for possible superconductivity different from the conventional BCS theory. Criteria for spin-charge separation, reconciliation and recombination driven by interaction strength, next-nearest coupling and temperature are found. Resulting phase diagrams resemble a number of inhomogeneous, coherent and incoherent nanoscale phases seen recently in high-T(c) cuprates, manganites and colossal magnetoresistive (CMR) nanomaterials.
C1 [Kocharian, A. N.] Calif State Univ Los Angeles, Dept Phys, Los Angeles, CA 90032 USA.
   [Kocharian, A. N.] LACCD Pierce Coll, Dept Phys, Woodland Hills, CA 91371 USA.
   [Fernando, G. W.; Palandage, K.] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA.
   [Davenport, J. W.] Brookhaven Natl Lab, Computat Sci Ctr, Upton, NY 11973 USA.
   [Davenport, J. W.] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
RP Kocharian, AN (reprint author), Calif State Univ Los Angeles, Dept Phys, Los Angeles, CA 90032 USA.
FU U.S. Department of Energy [DE-AC02-98CH10886]
FX We thank Daniil Khomskii and Valery Pokrovsky for helpful discussions
   and Tun Wang for valuable contributions. This research was supported in
   part by U.S. Department of Energy under Contract No. DE-AC02-98CH10886.
NR 27
TC 25
Z9 25
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 AUG
PY 2008
VL 78
IS 7
AR 075431
DI 10.1103/PhysRevB.78.075431
PG 7
WC Physics, Condensed Matter
SC Physics
GA 351EG
UT WOS:000259406700112
ER

PT J
AU Kumar, RS
   Svane, A
   Vaitheeswaran, G
   Kanchana, V
   Bauer, ED
   Hu, M
   Nicol, MF
   Cornelius, AL
AF Kumar, Ravhi S.
   Svane, Axel
   Vaitheeswaran, G.
   Kanchana, V.
   Bauer, Eric D.
   Hu, Michael
   Nicol, Malcolm F.
   Cornelius, Andrew L.
TI Pressure-induced valence change in YbAl(3): A combined high-pressure
   inelastic x-ray scattering and theoretical investigation
SO PHYSICAL REVIEW B
LA English
DT Article
ID SPIN-DENSITY APPROXIMATION; ELECTRONIC-STRUCTURE; YB COMPOUNDS;
   TEMPERATURE-DEPENDENCE; PHOTOELECTRON-SPECTROSCOPY; SYSTEMS;
   INSTABILITIES; TRANSPORT; CERIUM; CE
AB High-resolution x-ray-absorption (XAS) experiments in the partial fluorescence yield mode (PFY) and resonant inelastic x-ray emission (RXES) measurements were performed on the intermediate-valence compound YbAl(3) under pressure of up to 38 GPa. The results of the YbAl(3) PFY-XAS and RXES studies show that the valence of Yb increases smoothly from 2.75 at ambient pressure to 2.93 at 38 GPa. In situ angle-dispersive synchrotron high-pressure x-ray-diffraction experiments carried out using a diamond cell at room temperature show that the ambient pressure cubic phase is stable up to 40 GPa. The results obtained from self-interaction corrected local spin density-functional calculations to understand the pressure effect on the Yb valence and compressibility are in good agreement with the experimental results.
C1 [Kumar, Ravhi S.; Nicol, Malcolm F.; Cornelius, Andrew L.] Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA.
   [Kumar, Ravhi S.; Nicol, Malcolm F.; Cornelius, Andrew L.] Univ Nevada, HiPSEC, Las Vegas, NV 89154 USA.
   [Svane, Axel] Univ Aarhus, Dept Phys & Astron, DK-8000 Aarhus, Denmark.
   [Vaitheeswaran, G.; Kanchana, V.] Royal Inst Technol, Dept Mat Sci & Engn, Div Appl Mat Phys, S-10044 Stockholm, Sweden.
   [Bauer, Eric D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Hu, Michael] Argonne Natl Lab, Carnegie Inst Washington, HPCAT, Argonne, IL 60439 USA.
   [Hu, Michael] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Kumar, RS (reprint author), Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA.
EM ravhi@physics.unlv.edu
RI Bauer, Eric/D-7212-2011; Kumar, Ravhi/B-8427-2012; 
OI Kumar, Ravhi/0000-0002-1967-1619; Bauer, Eric/0000-0003-0017-1937
FU DOE [DEFG36-05GO08502]; National Nuclear Security Administration
   [DE-FC08-01NV14049]; Office of Science; Office of Basic Energy Sciences
   [W-31-109-ENG-38]; Swedish Natural Science Foundation (VR); Swedish
   Foundation for Strategic Research (SSF)
FX Work at HPCAT was supported by DOE Grant No. DEFG36-05GO08502. HPCAT is
   a collaboration among the UNLV High Pressure Science and Engineering
   Center, the Lawrence Livermore National Laboratory, the Geophysical
   Laboratory of the Carnegie Institution of Washington, and the University
   of Hawaii at Manoa. Work at Los Alamos was performed under the auspices
   of the U.S. DOE. The UNLV High Pressure Science and Engineering Center
   was supported by the U.S. Department of Energy, National Nuclear
   Security Administration, under Cooperative Agreement No.
   DE-FC08-01NV14049. The use of APS was supported by the U.S. Department
   of Energy, Office of Science, Office of Basic Energy Sciences, under
   Contract No. W-31-109-ENG-38. G.V. and V.K. acknowledge the Swedish
   Natural Science Foundation (VR) and Swedish Foundation for Strategic
   Research (SSF) for financial support.
NR 52
TC 11
Z9 11
U1 0
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 AUG
PY 2008
VL 78
IS 7
AR 075117
DI 10.1103/PhysRevB.78.075117
PG 7
WC Physics, Condensed Matter
SC Physics
GA 351EG
UT WOS:000259406700039
ER

PT J
AU Levashov, VA
   Egami, T
   Aga, RS
   Morris, JR
AF Levashov, V. A.
   Egami, T.
   Aga, R. S.
   Morris, J. R.
TI Equipartition theorem and the dynamics of liquids
SO PHYSICAL REVIEW B
LA English
DT Article
ID GLASS-TRANSITION; AMORPHOUS SOLIDS; STRUCTURAL DEFECTS;
   MOLECULAR-DYNAMICS; FLUCTUATIONS; METALS
AB In liquids, phonons have a very short lifetime and the total potential energy does not depend linearly on temperature. Thus it may appear that atomic vibrations in liquids cannot be described by the harmonic-oscillator model and that the equipartition theorem for the potential energy is not upheld. In this paper we show that the description of the local atomic dynamics in terms of the atomic-level stresses provides such a description, satisfying the equipartition theorem. To prove this point we carried out molecular-dynamics simulations with several pairwise potentials, including the Lennard-Jones potential, the modified Johnson potential, and the repulsive part of the Johnson potential, at various particle number densities. In all cases studied the total self-energy of the atomic-level stresses followed the (3/2)k(B)T law. From these results we suggest that the concept of local atomic stresses can provide description of thermodynamic properties of glasses and liquids on the basis of harmonic atomistic excitations. An example of application of this approach to the description of the glass transition temperature in metallic glasses is discussed.
C1 [Levashov, V. A.; Egami, T.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
   [Egami, T.; Morris, J. R.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
   [Aga, R. S.; Morris, J. R.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Levashov, VA (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RI Morris, J/I-4452-2012
OI Morris, J/0000-0002-8464-9047
NR 23
TC 30
Z9 30
U1 1
U2 19
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 AUG
PY 2008
VL 78
IS 6
AR 064205
DI 10.1103/PhysRevB.78.064205
PG 8
WC Physics, Condensed Matter
SC Physics
GA 349EU
UT WOS:000259264900037
ER

PT J
AU Lizarraga, R
   Nordstrom, L
   Eriksson, O
   Wills, J
AF Lizarraga, Raquel
   Nordstroem, Lars
   Eriksson, Olle
   Wills, John
TI Noncollinear magnetism in the high-pressure hcp phase of iron
SO PHYSICAL REVIEW B
LA English
DT Article
ID STATIC COMPRESSION; SUPERCONDUCTIVITY; FE; GAS
AB The magnetic structure of iron in its high-pressure hcp phase has been investigated with the full-potential augmented plane wave with local orbitals method that allows for noncollinear magnetism. In our study we consider different spin spiral structures and, three antiferromagnetic configurations that have been previously discussed in the literature. We found that some of the magnetic structures are only metastable, and that a nonsymmetric incommensurate spin spiral state with wave vector q = (0.56, 0.22, 0)2 pi/a and two different antiferromagnetic structures are the most stable ones being almost degenerate around the equilibrium volume. These magnetic structures ought to exist in the pressure range where hcp iron becomes stable.
C1 [Lizarraga, Raquel] Univ Austral Chile, Fac Ciencias, Inst Fis, Valdivia, Chile.
   [Lizarraga, Raquel; Wills, John] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Nordstroem, Lars; Eriksson, Olle] Uppsala Univ, Dept Phys & Mat Sci, Angstrom Lab, S-75121 Uppsala, Sweden.
RP Lizarraga, R (reprint author), Univ Austral Chile, Fac Ciencias, Inst Fis, Casilla 567, Valdivia, Chile.
RI Eriksson, Olle/E-3265-2014
OI Eriksson, Olle/0000-0001-5111-1374
FU Swedish Research Council; Swedish Foundation for Strategic Research
   (SSF); Swedish National Allocation Committee (SNAC); DID-UACh
   [S-200851]; CONICYT (Chile) [ACT24/2006]
FX Support from the Swedish Research Council (VR) and the Swedish
   Foundation for Strategic Research (SSF) are acknowledged. We are also
   thankful for the support from the Swedish National Allocation Committee
   (SNAC). R.L. would like to acknowledge support from DID-UACh: Project
   No. S-200851 and CONICYT (Chile) under Grant ACT24/2006.
NR 28
TC 16
Z9 17
U1 1
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD AUG
PY 2008
VL 78
IS 6
AR 064410
DI 10.1103/PhysRevB.78.064410
PG 4
WC Physics, Condensed Matter
SC Physics
GA 349EU
UT WOS:000259264900059
ER

PT J
AU Mazin, II
   Johannes, MD
   Boeri, L
   Koepernik, K
   Singh, DJ
AF Mazin, I. I.
   Johannes, M. D.
   Boeri, L.
   Koepernik, K.
   Singh, D. J.
TI Problems with reconciling density functional theory calculations with
   experiment in ferropnictides
SO PHYSICAL REVIEW B
LA English
DT Article
ID SUPERCONDUCTIVITY; INSTABILITY; ORDER
AB First-principles calculations of magnetic and, to a lesser extent, electronic properties of the LaFeAsO-based superconductors show substantial apparent controversy, as opposed to most weakly or strongly correlated materials. Not only do different reports disagree about quantitative values but there is also a schism in terms of interpreting the basic physics of the magnetic interactions in this system. In this paper, we present a systematic analysis using four different first-principles methods and show that while there is an unusual sensitivity to computational details, well-converged full-potential all-electron results are fully consistent among themselves. What makes results so sensitive and the system so different from simple local magnetic moments interacting via basic superexchange mechanisms is the itinerant character of the calculated magnetic ground state, where very soft magnetic moments and long-range interactions are characterized by a particular structure in the reciprocal (as opposed to real) space. Therefore, unravelling the magnetic interactions in their full richness remains a challenging but utterly important task.
C1 [Mazin, I. I.; Johannes, M. D.] USN, Res Lab, Washington, DC 20375 USA.
   [Boeri, L.] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany.
   [Koepernik, K.] IFW Dresden, D-01171 Dresden, Germany.
   [Singh, D. J.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Mazin, II (reprint author), USN, Res Lab, Code 6693, Washington, DC 20375 USA.
RI Singh, David/I-2416-2012; Mazin, Igor/B-6576-2008; Boeri,
   Lilia/B-6162-2015
OI Boeri, Lilia/0000-0003-1186-2207
FU Office of Naval Research; BES, Division of Materials Sciences and
   Engineering, Department of Energy
FX Work at NRL was supported by the Office of Naval Research. Work at ORNL
   was supported by the BES, Division of Materials Sciences and
   Engineering, Department of Energy. We would like to thank S. Massida for
   alerting us to a crucial error in one of our figures.
NR 40
TC 286
Z9 292
U1 3
U2 32
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 AUG
PY 2008
VL 78
IS 8
AR 085104
DI 10.1103/PhysRevB.78.085104
PG 7
WC Physics, Condensed Matter
SC Physics
GA 351EI
UT WOS:000259406900017
ER

PT J
AU Morozovska, AN
   Svechnikov, SV
   Eliseev, EA
   Rodriguez, BJ
   Jesse, S
   Kalinin, SV
AF Morozovska, Anna N.
   Svechnikov, Sergei V.
   Eliseev, Eugene A.
   Rodriguez, Brian J.
   Jesse, Stephen
   Kalinin, Sergei V.
TI Local polarization switching in the presence of surface-charged defects:
   Microscopic mechanisms and piezoresponse force spectroscopy observations
SO PHYSICAL REVIEW B
LA English
DT Article
ID FERROELECTRIC THIN-FILMS; DOMAINS; DISLOCATIONS; NUCLEATION; DYNAMICS
AB Thermodynamic description of probe-induced polarization switching in ferroelectrics in the presence of well-localized surface field defects and their effect on local piezoresponse force spectroscopy measurements is analyzed. Corresponding analytical expressions for the free energy, activation energy, nucleation bias, and nucleus sizes are derived. Both numerical calculations and analytical expressions demonstrate that well-localized field defects significantly affect domain nucleation conditions. The signature of the defects in reproducible piezoresponse hysteresis loop fine structure are identified and compared to experimental observations. Deconvolution of piezoresponse force spectroscopy measurements to extract relevant defect parameters is demonstrated. Proposed approach can be extended to switching in other ferroics, establishing a pathway for the understanding of the thermodynamics and kinetics of phase transitions at a single-defect level.
C1 [Morozovska, Anna N.; Svechnikov, Sergei V.] Natl Acad Sci Ukraine, Inst Semicond Phys, UA-03028 Kiev, Ukraine.
   [Eliseev, Eugene A.] Natl Acad Sci Ukraine, Inst Problems Mat Sci, UA-03142 Kiev, Ukraine.
   [Rodriguez, Brian J.; Jesse, Stephen; Kalinin, Sergei V.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
   [Rodriguez, Brian J.; Jesse, Stephen; Kalinin, Sergei V.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Morozovska, AN (reprint author), Natl Acad Sci Ukraine, Inst Semicond Phys, 45 Prospekt Nauki, UA-03028 Kiev, Ukraine.
EM morozo@i.com.ua; sergei2@ornl.gov
RI Kalinin, Sergei/I-9096-2012; Rodriguez, Brian/A-6253-2009; Jesse,
   Stephen/D-3975-2016
OI Kalinin, Sergei/0000-0001-5354-6152; Rodriguez,
   Brian/0000-0001-9419-2717; Jesse, Stephen/0000-0002-1168-8483
NR 56
TC 22
Z9 22
U1 0
U2 18
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 AUG
PY 2008
VL 78
IS 5
AR 054101
DI 10.1103/PhysRevB.78.054101
PG 17
WC Physics, Condensed Matter
SC Physics
GA 350QM
UT WOS:000259368200027
ER

PT J
AU Moussa, JE
   Cohen, ML
AF Moussa, Jonathan E.
   Cohen, Marvin L.
TI Using molecular fragments to estimate electron-phonon coupling and
   possible superconductivity in covalent materials
SO PHYSICAL REVIEW B
LA English
DT Article
ID TEMPERATURE; HYDROGEN
AB We examine the electron-phonon coupling in a class of covalent materials by performing calculations on a set of molecular units from which they might be composed. By considering coupling to states at energies in the vicinity of the Fermi energy, we develop a picture of how couplings might be affected as these units are connected to form extended systems. Guided by this study of molecular fragments, we construct two examples of hypothetical covalent superconductors each with a transition temperature estimated to be similar to 380 K within Eliashberg theory. These hypothetical materials enter the regime of narrow-bandwidth metals where the superconducting state may be destabilized by one of several electronic instabilities and Eliashberg theory may no longer apply.
C1 [Moussa, Jonathan E.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Moussa, JE (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM jmoussa@civet.berkeley.edu
FU National Science Foundation [DMR07-05941]; U.S. Department of Energy
   [DE-AC02-05CH11231]
FX This work was supported by National Science Foundation under 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.
NR 36
TC 12
Z9 12
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 AUG
PY 2008
VL 78
IS 6
AR 064502
DI 10.1103/PhysRevB.78.064502
PG 7
WC Physics, Condensed Matter
SC Physics
GA 349EU
UT WOS:000259264900081
ER

PT J
AU Nakhmanson, SM
AF Nakhmanson, S. M.
TI Revealing latent structural instabilities in perovskite ferroelectrics
   by layering and epitaxial strain: A first-principles study of
   Ruddlesden-Popper superlattices
SO PHYSICAL REVIEW B
LA English
DT Article
ID POLARIZATION ENHANCEMENT; QUANTUM CRITICALITY; INVERSION SYMMETRY;
   RUTHENATE SR3RU2O7; THIN-FILMS; SUPERCONDUCTIVITY; CRYSTALS; TRIPLET;
   OXIDES; SPIN
AB Utilizing first-principles computational techniques, we have mapped out structural instabilities in the Ruddlesden-Popper homologous oxide superlattice families with a general chemical formula A(n-1)A(2)'TinO3n+1, A = Sr, Ba, and Pb (perovskite-type slab) and A' = Sr (rocksalt-type insert) for n = 1-5. Our calculations show that each superlattice family has a unique set of "instability footprints," combining the ferroelectric, antiferroelectric, and antiferrodistortive types, and that the competition among the instabilities can be influenced by epitaxial strain and changing thickness of the perovskite-type slab, granting us wide flexibility to fine tune the properties of these materials for various device applications.
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Nakhmanson, SM (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Nakhmanson, Serge/A-6329-2014
FU  [DE-AC02-06CH11357]
FX This project was supported under Contract No. DE-AC02-06CH11357 between
   UChicago Argonne, LLC, and the Department of Energy. The author is
   grateful to Dillon Fong, Peter Zapol, Seungbum Hong, Amanda
   Petford-Long, and Orlando Auciello for many fruitful discussions.
NR 46
TC 15
Z9 15
U1 6
U2 28
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 AUG
PY 2008
VL 78
IS 6
AR 064107
DI 10.1103/PhysRevB.78.064107
PG 5
WC Physics, Condensed Matter
SC Physics
GA 349EU
UT WOS:000259264900022
ER

PT J
AU Nandi, S
   Kreyssig, A
   Yan, JQ
   Vannette, MD
   Lang, JC
   Tan, L
   Kim, JW
   Prozorov, R
   Lograsso, TA
   McQueeney, RJ
   Goldman, AI
AF Nandi, S.
   Kreyssig, A.
   Yan, J. Q.
   Vannette, M. D.
   Lang, J. C.
   Tan, L.
   Kim, J. W.
   Prozorov, R.
   Lograsso, T. A.
   McQueeney, R. J.
   Goldman, A. I.
TI Magnetic structure of Dy(3+) in hexagonal multiferroic DyMnO(3)
SO PHYSICAL REVIEW B
LA English
DT Article
ID EXCHANGE SCATTERING; SINGLE-CRYSTALS; POLARIZATION; TRANSITIONS; HOMNO3
AB Element specific x-ray resonant magnetic scattering (XRMS) investigations were undertaken to determine the magnetic structure of the multiferroic compound, hexagonal DyMnO(3). In the temperature range from 68 K down to 8 K the Dy(3+) moments are aligned and antiferromagnetically correlated in the c direction according to the magnetic representation Gamma(3). The temperature dependence of the observed intensity can be modeled assuming the splitting of ground-state doublet crystal-field levels of Dy(3+) by the exchange field of Mn(3+). XRMS together with magnetization measurements indicate that the magnetic representation is Gamma(2) below 8 K.
C1 [Nandi, S.; Kreyssig, A.; Yan, J. Q.; Vannette, M. D.; Tan, L.; Kim, J. W.; Prozorov, R.; Lograsso, T. A.; McQueeney, R. J.; Goldman, A. I.] US DOE, Ames Lab, Ames, IA 50011 USA.
   [Nandi, S.; Kreyssig, A.; Yan, J. Q.; Vannette, M. D.; Tan, L.; Kim, J. W.; Prozorov, R.; McQueeney, R. J.; Goldman, A. I.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
   [Lang, J. C.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Nandi, S (reprint author), US DOE, Ames Lab, Ames, IA 50011 USA.
RI Prozorov, Ruslan/A-2487-2008; McQueeney, Robert/A-2864-2016
OI Prozorov, Ruslan/0000-0002-8088-6096; McQueeney,
   Robert/0000-0003-0718-5602
FU U.S. DOE [DE-AC02-07CH11358, DE-AC02-06CH11357]
FX We appreciate the help of Daniel Haskel for additional measurements. We
   are indebted to D. S. Robinson for his help during the experiments. The
   work at the Ames Laboratory and at the MU-CAT sector was supported by
   the U.S. DOE under Contract No. DE-AC02-07CH11358. The use of the
   Advanced Photon Source was supported by U.S. DOE under Contract No.
   DE-AC02-06CH11357.
NR 19
TC 25
Z9 25
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 AUG
PY 2008
VL 78
IS 7
AR 075118
DI 10.1103/PhysRevB.78.075118
PG 5
WC Physics, Condensed Matter
SC Physics
GA 351EG
UT WOS:000259406700040
ER

PT J
AU Oeschler, N
   Fisher, RA
   Phillips, NE
   Gordon, JE
   Foo, ML
   Cava, RJ
AF Oeschler, N.
   Fisher, R. A.
   Phillips, N. E.
   Gordon, J. E.
   Foo, M. -L.
   Cava, R. J.
TI Specific heat of Na(0.3)CoO(2)center dot 1.3H(2)O: Two energy gaps,
   nonmagnetic pair breaking, strong fluctuations in the superconducting
   state, and effects of sample age
SO PHYSICAL REVIEW B
LA English
DT Article
ID D-WAVE SUPERCONDUCTORS; CU-O SYSTEM; ELECTRONIC-STRUCTURE;
   PHASE-DIAGRAM; CAPACITY; NAXCOO2; NAXCOO2-CENTER-DOT-YH(2)O; DEPENDENCE;
   CRYSTAL; MODEL
AB The specific heat of three samples of Na(0.3)CoO(2) center dot 1.3H(2)O shows an evolution of the superconductivity and its eventual disappearance with increasing sample age. The specific heat of two superconducting samples is characteristic of a superconductor with two energy gaps, which implies contributions of two electron bands to the Fermi surface. The changes in the specific heat are associated with a nonmagnetic pair-breaking action that progresses with sample age and acts preferentially in the band with the smaller gap to produce an increasing "residual" electron density of states and a shift in the relative contributions of the bands to the superconducting condensate. For the nonsuperconducting sample the pair breaking has weakened the superconducting-state electron pairing to the point that it has given way to a competing order. The similarity of the time scale for these changes to that recently reported for the formation of 0 vacancies suggests a relation between the two effects and the identification of the 0 vacancies as the pair.-breaking scattering centers. Together, these effects provide an understanding, of the strong sample dependence of the properties of this material. They also suggest an unusual competition between two effects of the 0 vacancies: enhancement of the superconductivity at low concentrations by adjusting the carrier concentration and destruction of the superconductivity at high concentrations by pair breaking. Comparison of the coefficient of the normal-state conduction-electron specific heat, gamma(n) = 16.1 mJ K(-2) mol(-1), with band-structure calculations supports the existence of the controversial e'(g) hole pockets in the Fermi surface, in addition to the well established a(1g) surface. The onset of the transition to the vortex state is independent of magnetic field, suggesting the presence of unusually strong fluctuation effects. The specific-heat results and their implications for band structure and symmetry of the superconducting-state order parameter are compared with other experimental and theoretical results.
C1 [Oeschler, N.; Fisher, R. A.; Phillips, N. E.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [Oeschler, N.; Fisher, R. A.; Phillips, N. E.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Gordon, J. E.] Amherst Coll, Dept Phys, Amherst, MA 01002 USA.
   [Foo, M. -L.; Cava, R. J.] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA.
RP Oeschler, N (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RI Foo, Maw Lin/H-9273-2012
FU U.S. Department of Energy [DE-AC02-05CH11231]; NSF [DMR-0213706];
   DOE-BES [DE-FG02-98-ER45706]; DAAD
FX We thank B. H. Brandow, D.-H. Lee, I. I. Mazin, D. J. Singh, P. Zhang,
   V. Kresin, and R. E. Walstedt for helpful comments and discussions and
   A. Bussman-Holder for communicating results of calculations of the
   specific heat of sample 3. The work at LBNL was supported by the
   Director, Office of Science, Office of Basic Energy Sciences, of the
   U.S. Department of Energy under Contract No. DE-AC02-05CH11231 and that
   at Princeton by NSF under Grant No. DMR-0213706 and by DOE-BES under
   Grant No. DE-FG02-98-ER45706. N.O. was supported, in part, by the DAAD.
NR 83
TC 21
Z9 21
U1 1
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD AUG
PY 2008
VL 78
IS 5
AR 054528
DI 10.1103/PhysRevB.78.054528
PG 15
WC Physics, Condensed Matter
SC Physics
GA 350QM
UT WOS:000259368200132
ER

PT J
AU Palczewski, AD
   Kondo, T
   Khasanov, R
   Kolesnikov, NN
   Timonina, AV
   Rotenberg, E
   Ohta, T
   Bendounan, A
   Sassa, Y
   Fedorov, A
   Pailhes, S
   Santander-Syro, AF
   Chang, J
   Shi, M
   Mesot, J
   Fretwell, HM
   Kaminski, A
AF Palczewski, A. D.
   Kondo, T.
   Khasanov, R.
   Kolesnikov, N. N.
   Timonina, A. V.
   Rotenberg, E.
   Ohta, T.
   Bendounan, A.
   Sassa, Y.
   Fedorov, A.
   Pailhes, S.
   Santander-Syro, A. F.
   Chang, J.
   Shi, M.
   Mesot, J.
   Fretwell, H. M.
   Kaminski, A.
TI Origins of large critical temperature variations in single-layer
   cuprates
SO PHYSICAL REVIEW B
LA English
DT Article
ID SUPERCONDUCTING GAP; FERMI-SURFACE; CA2-XNAXCUO2CL2; BI2SR2CACU2O8;
   TL2BA2CUO6; ANISOTROPY; CRYSTALS; TC
AB We study the electronic structures of two single-layer superconducting cuprates, Tl2Ba2CuO6+delta (T12201) and (Bi1.35Pb0.85) (Sr1.47La0.38) CuO6+delta (Bi2201) which have very different maximum critical temperatures (90 K and 35 K, respectively) using angular-resolved photoemission spectroscopy (ARPES). We are able to identify two main differences in their electronic properties. First, the shadow band that is present in double-layer and low T-c,T-max single-layer cuprates is absent in T12201. Recent studies have linked the shadow band to structural distortions in the lattice and the absence of these in T12201 may be a contributing factor in its T-c,T-max Second, T12201's Fermi surface (FS) contains long straight parallel regions near the antinode, while in Bi2201 the antinodal region is much more rounded. Since the size of the superconducting gap is largest in the antinodal region, differences in the band dispersion at the antinode may play a significant role in the pairing and therefore affect the maximum transition temperature.
C1 [Palczewski, A. D.; Kondo, T.; Fretwell, H. M.; Kaminski, A.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
   [Palczewski, A. D.; Kondo, T.; Fretwell, H. M.; Kaminski, A.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
   [Khasanov, R.] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland.
   [Kolesnikov, N. N.; Timonina, A. V.] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Russia.
   [Rotenberg, E.; Ohta, T.] Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
   [Bendounan, A.; Sassa, Y.; Pailhes, S.; Chang, J.; Mesot, J.] ETH, Neutron Scattering Lab, CH-5232 Villigen, Switzerland.
   [Santander-Syro, A. F.] ESPCI, CNRS, Lab Photons & Matiere, UPR 5, F-75231 Paris 5, France.
   [Santander-Syro, A. F.] Univ Paris 11, CNRS, Phys Solides Lab, UMR 8502, F-91405 Orsay, France.
   [Shi, M.] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland.
RP Palczewski, AD (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
RI Rotenberg, Eli/B-3700-2009; Santander-Syro, Andres/D-7017-2012; Chang,
   Johan/F-1506-2014; Kondo, Takeshi/H-2680-2016; Sassa,
   Yasmine/F-3362-2017; 
OI Rotenberg, Eli/0000-0002-3979-8844; Santander-Syro,
   Andres/0000-0003-3966-2485; Chang, Johan/0000-0002-4655-1516; Khasanov,
   Rustem/0000-0002-4768-5524
FU Department of Energy at Iowa State University [DE-AC02-07CH11358]; U.S.
   Department of Energy [DE-AC02-05CH11231]; European Commission; European
   Research Area, Research Infrastructures [RII3-CT-2004-506008]
FX The work at the Ames Laboratory was supported by the Department of
   Energy at Iowa State University. Ames Laboratory was supported under
   Contract No. DE-AC02-07CH11358. The Advanced Light Source was supported
   by the Director, Office of Science, Office of Basic Energy Sciences, of
   the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. This
   research project was also supported by the European Commission under the
   6th Framework Programme: Strengthening the European Research Area,
   Research Infrastructures Contract No. RII3-CT-2004-506008.
NR 35
TC 7
Z9 7
U1 2
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 AUG
PY 2008
VL 78
IS 5
AR 054523
DI 10.1103/PhysRevB.78.054523
PG 5
WC Physics, Condensed Matter
SC Physics
GA 350QM
UT WOS:000259368200127
ER

PT J
AU Petkov, V
   Buscaglia, V
   Buscaglia, MT
   Zhao, Z
   Ren, Y
AF Petkov, V.
   Buscaglia, V.
   Buscaglia, M. T.
   Zhao, Z.
   Ren, Y.
TI Structural coherence and ferroelectricity decay in submicron- and
   nano-sized perovskites
SO PHYSICAL REVIEW B
LA English
DT Article
ID BARIUM-TITANATE CERAMICS; ATOMIC-SCALE STRUCTURE; X-RAY-DIFFRACTION;
   THIN-FILMS; GRAIN-SIZE; DIELECTRIC-PROPERTIES; BATIO3 CERAMICS;
   DEAD-LAYER; CAPACITORS; NANOSCALE
AB Understanding the loss of ferroelectricity in submicron- and nano-sized perovskites is an issue that has been debated for decades. Here we report results from a high-energy x-ray diffraction (XRD) study on a prime example of the perovskite's family, BaTiO(3) ceramics with a grain size ranging from 1200 to 5 nm. We find that the loss of ferroelectricity in submicron- and nano-sized BaTiO(3) has an intrinsic origin related to the increased atomic positional disorder in spatially confined physical systems. Our results imply that no particular critical size at which ferroelectricity in BaTO(3), in particular, and perovskites, in general, is completely lost exists. Rather it weakens exponentially with the decreasing of their physical size. Smart technological solutions are needed to bring it back.
C1 [Petkov, V.] Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA.
   [Buscaglia, V.; Buscaglia, M. T.] CNR, Inst Energet & Interphases, I-16149 Genoa, Italy.
   [Zhao, Z.] Univ Stockholm, Inst Inorgan Chem, S-10691 Stockholm, Sweden.
   [Ren, Y.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Petkov, V (reprint author), Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA.
EM petkov@phy.cmich.edu; v.buscaglia@ge.ieni.cnr.it
RI Buscaglia, Vincenzo/E-8758-2011; Buscaglia, Maria Teresa/B-9504-2015;
   Zhao, Zhe/C-3951-2012
OI Buscaglia, Maria Teresa/0000-0003-1694-2441; Zhao,
   Zhe/0000-0003-3060-9987
FU CMU [REF C602281]; U.S. Department of Energy; Office of Science; Office
   of Basic Energy Sciences [DE-AC02-06CH11357]
FX This work was supported in part by CMU through Grant No. REF C602281.
   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. One of the authors (V.P.) is thankful to
   S. Pradhan and M. Gateshki for help in the XRD data analysis and useful
   discussions.
NR 45
TC 45
Z9 45
U1 1
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 AUG
PY 2008
VL 78
IS 5
AR 054107
DI 10.1103/PhysRevB.78.054107
PG 7
WC Physics, Condensed Matter
SC Physics
GA 350QM
UT WOS:000259368200033
ER

PT J
AU Pistolesi, F
   Blanter, YM
   Martin, I
AF Pistolesi, F.
   Blanter, Ya. M.
   Martin, Ivar
TI Self-consistent theory of molecular switching
SO PHYSICAL REVIEW B
LA English
DT Article
ID QUANTUM-NOISE; TRANSISTORS; ELECTRONICS; CONDUCTANCE; TRANSPORT;
   JUNCTIONS
AB We study the model of a molecular switch comprised of a molecule with a soft vibrational degree of freedom coupled to metallic leads. In the presence of strong electron-ion interaction, different charge states of the molecule correspond to substantially different ionic configurations, which can lead to very slow switching between energetically close configurations (Franck-Condon blockade). Application of transport voltage, however, can drive the molecule far out of thermal equilibrium and thus dramatically accelerate the switching. The tunneling electrons play the role of a heat bath with an effective temperature dependent on the applied transport voltage. Including the transport-induced "heating" self-consistently, we determine the stationary current-voltage characteristics of the device and the switching dynamics for symmetric and asymmetric devices. We also study the effects of an extra dissipative environment and demonstrate that it can lead to enhanced nonlinearities in the transport properties of the device and dramatically suppress the switching dynamics.
C1 [Pistolesi, F.] Univ Grenoble 1, Lab Phys & Modelisat Milieux Condenses, CNRS, F-38042 Grenoble, France.
   [Blanter, Ya. M.] Delft Univ Technol, Kavli Inst Nanosci, NL-2628 CJ Delft, Netherlands.
   [Martin, Ivar] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87544 USA.
RP Pistolesi, F (reprint author), Univ Grenoble 1, Lab Phys & Modelisat Milieux Condenses, CNRS, Boite Postale 166, F-38042 Grenoble, France.
RI Pistolesi, Fabio/A-7537-2012
FU French Agence Nationale de la Recherche [ANR-06-JCJC-036]; NEMESIS;
   Netherlands Foundation for Fundamental Research on Matter (FOM); U.S.
   Department of Energy [DE-AC52-06NA25396]; LANL/LDRD Program
FX We acknowledge useful discussions with A. Armour and M. Houzet. This
   work was supported by the French Agence Nationale de la Recherche under
   Contract No. ANR-06-JCJC-036, NEMESIS, and Netherlands Foundation for
   Fundamental Research on Matter (FOM). The work at Los Alamos National
   Laboratory was carried out under the auspices of the National Nuclear
   Security Administration of the U.S. Department of Energy under Contract
   No. DE-AC52-06NA25396 and supported by the LANL/LDRD Program. F.P.
   thanks A. Buzdin and his group for hospitality at the Centre de Physique
   Moleculaire Optique et Hertzienne of Bordeaux (France) where part of
   this work was completed.
NR 53
TC 42
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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 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD AUG
PY 2008
VL 78
IS 8
AR 085127
DI 10.1103/PhysRevB.78.085127
PG 12
WC Physics, Condensed Matter
SC Physics
GA 351EI
UT WOS:000259406900040
ER

PT J
AU Qiu, Y
   Kofu, M
   Bao, W
   Lee, SH
   Huang, Q
   Yildirim, T
   Copley, JRD
   Lynn, JW
   Wu, T
   Wu, G
   Chen, XH
AF Qiu, Y.
   Kofu, M.
   Bao, Wei
   Lee, S. -H.
   Huang, Q.
   Yildirim, T.
   Copley, J. R. D.
   Lynn, J. W.
   Wu, T.
   Wu, G.
   Chen, X. H.
TI Neutron-scattering study of the oxypnictide superconductor
   LaFeAsO0.87F0.13
SO PHYSICAL REVIEW B
LA English
DT Article
ID LAYERED QUATERNARY COMPOUND; ORDER
AB The recently discovered superconductor LaO0.87F0.13FeAs (T-C approximate to 26 K) was investigated using the neutron-scattering technique. No spin-density-wave (SDW) order was observed in the normal state or in the superconducting state, both with and without an applied magnetic field of 9 T, consistent with the proposal that SDW and superconductivity are competing in the laminar materials. While our inelastic measurements offer no constraint on the spin dynamic response from a d-wave pairing, an upper limit for the magnetic-resonance peak predicted from an extended s-Wave pairing mechanism is provided. Our measurements also support the energy scale of the calculated phonon spectrum, which is used in the electron-phonon coupling theory and fails to produce the high observed T-C.
C1 [Qiu, Y.; Huang, Q.; Yildirim, T.; Copley, J. R. D.; Lynn, J. W.] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
   [Qiu, Y.] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA.
   [Kofu, M.; Lee, S. -H.] Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA.
   [Bao, Wei] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Wu, T.; Wu, G.; Chen, X. H.] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China.
   [Wu, T.; Wu, G.; Chen, X. H.] Univ Sci & Technol China, Dept Phys, Hefei 230026, Anhui, Peoples R China.
RP Bao, W (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM wbao@lanl.gov
RI yildirim, taner/A-1290-2009; Bao, Wei/E-9988-2011
OI Bao, Wei/0000-0002-2105-461X
FU Natural Science Foundation of China, Ministry of Science and Technology
   of China [2006CB601001]; National Basic Research Program of China
   [2006CB922005]; U.S. DOE [DE-FG02-07ER45384]; NSF [DMR-0454672]
FX We would like to thank D. J. Singh and M.-H. Du for their useful
   communications. Work at LANL is supported by U.S. DOE-OS-BES, at USTC by
   the Natural Science Foundation of China, Ministry of Science and
   Technology of China (973 Project No. 2006CB601001) and by the National
   Basic Research Program of China Contract No. 2006CB922005, at UVA by the
   U.S. DOE through Contract No. DE-FG02-07ER45384. The DCS at NIST is
   partially supported by NSF under Agreement No. DMR-0454672.
NR 42
TC 43
Z9 44
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 AUG
PY 2008
VL 78
IS 5
AR 052508
DI 10.1103/PhysRevB.78.052508
PG 4
WC Physics, Condensed Matter
SC Physics
GA 350QM
UT WOS:000259368200025
ER

PT J
AU Rushforth, AW
   Farley, NRS
   Campion, RP
   Edmonds, KW
   Staddon, CR
   Foxon, CT
   Gallagher, BL
   Yu, KM
AF Rushforth, A. W.
   Farley, N. R. S.
   Campion, R. P.
   Edmonds, K. W.
   Staddon, C. R.
   Foxon, C. T.
   Gallagher, B. L.
   Yu, K. M.
TI Compositional dependence of ferromagnetism in (Al,Ga,Mn)As magnetic
   semiconductors
SO PHYSICAL REVIEW B
LA English
DT Article
ID TRANSPORT-PROPERTIES; GA1-XMNXAS; HETEROSTRUCTURES; (GA,MN)AS
AB We report on a detailed study of the magnetic, electrical, and structural properties of the quaternary ferromagnetic semiconductor (Al,Ga,Mn)As. We investigate films with Al concentration y varying from 0.05 to 1, with a fixed total Mn density. The ferromagnetic transition temperature T, decreases with increasing Al concentration, with no ferromagnetism observed at y=0.5 and y=0.75 for as-grown and annealed films, respectively. Detailed measurements identify three mechanisms giving rise to a suppression of T, on alloying with Al: an increased tendency for Mn to occupy compensating interstitial sites, an increased stability of interstitials against annealing, and an increased localization of carriers. These studies serve as a test of the validity of theories of ferromagnetism in III-V semiconductors across different chemical compositions and represent a starting point for the development of new GaAs/(Al,Ga)As ferromagnetic heterostructures.
C1 [Rushforth, A. W.; Farley, N. R. S.; Campion, R. P.; Edmonds, K. W.; Staddon, C. R.; Foxon, C. T.; Gallagher, B. L.] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England.
   [Yu, K. M.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Rushforth, AW (reprint author), Univ Nottingham, Sch Phys & Astron, Univ Pk, Nottingham NG7 2RD, England.
RI Yu, Kin Man/J-1399-2012; Gallagher, Bryan/B-8116-2013; 
OI Yu, Kin Man/0000-0003-1350-9642; Edmonds, Kevin/0000-0002-9793-4170;
   Gallagher, Bryan/0000-0001-8310-0899; Campion,
   Richard/0000-0001-8990-8987; Rushforth, Andrew/0000-0001-8774-6662
FU EU [IST-015728]; EPSRC-GB [GR/S81407/01, EP/D051487]; U.S. Department of
   Energy [DE-AC02-05CH11231]
FX We acknowledge discussions with Tomas Jungwirth, Josef Kudrnovsky, and
   Jan Masek and funding from EU Grant No. IST-015728 and EPSRC-GB Grants
   No. GR/S81407/01 and No. EP/D051487. The work performed at LBNL was
   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.
NR 30
TC 10
Z9 10
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 AUG
PY 2008
VL 78
IS 8
AR 085209
DI 10.1103/PhysRevB.78.085209
PG 6
WC Physics, Condensed Matter
SC Physics
GA 351EI
UT WOS:000259406900053
ER

PT J
AU Sha, H
   Ye, F
   Dai, PC
   Fernandez-Baca, JA
   Mesa, D
   Lynn, JW
   Tomioka, Y
   Tokura, Y
   Zhang, JD
AF Sha, Hao
   Ye, F.
   Dai, Pengcheng
   Fernandez-Baca, J. A.
   Mesa, Dalgis
   Lynn, J. W.
   Tomioka, Y.
   Tokura, Y.
   Zhang, Jiandi
TI Signature of magnetic phase separation in the ground state of
   Pr(1-x)Ca(x)MnO(3)
SO PHYSICAL REVIEW B
LA English
DT Article
ID MANGANITES
AB Neutron scattering has been used to investigate the evolution of long- and short-range charge-ordered (CO), ferromagnetic, and antiferromagnetic (AF) correlations in single crystals of Pr(1-x)Ca(x)MnO(3). The existence and population of spin clusters as reflected by short-range correlations are found to drastically depend on the doping and temperature. Concentrated spin clusters coexist with long-range canted AF order in a wide temperature range in the x=0.3 while clusters do not appear in the x=0.4 crystal. In contrast, both CO and AF order parameters in the x=0.35 crystal show a precipitous decrease below similar to 35 K where spin clusters form. These results provide direct evidence of magnetic phase separation and demonstrate a critical doping x(c) (close to x=0.35) that divides the inhomogeneous from homogeneous CO ground state.
C1 [Sha, Hao; Mesa, Dalgis; Zhang, Jiandi] Florida Int Univ, Dept Phys, Miami, FL 33199 USA.
   [Ye, F.; Dai, Pengcheng; Fernandez-Baca, J. A.] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
   [Dai, Pengcheng; Fernandez-Baca, J. A.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
   [Lynn, J. W.] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
   [Tomioka, Y.; Tokura, Y.] Natl Inst Adv Ind Sci & Technol, CERC, Tsukuba, Ibaraki 3050046, Japan.
   [Tokura, Y.] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan.
RP Sha, H (reprint author), Florida Int Univ, Dept Phys, Miami, FL 33199 USA.
EM zhangj@fiu.edu
RI Sha, Hao/D-8107-2011; Ye, Feng/B-3210-2010; Tokura,
   Yoshinori/C-7352-2009; Dai, Pengcheng /C-9171-2012; Fernandez-Baca,
   Jaime/C-3984-2014
OI Ye, Feng/0000-0001-7477-4648; Dai, Pengcheng /0000-0002-6088-3170;
   Fernandez-Baca, Jaime/0000-0001-9080-5096
FU U.S. DOE [FG02-04ER46125]; NSF [DMR-0346826]; U.S. NSF [DMR-0756568]
FX This work was supported by the U.S. DOE FG02-04ER46125 and NSF
   DMR-0346826. P.D. was supported by U.S. NSF DMR-0756568. ORNL is managed
   by UT-Battelle, LLC, for the U.S. DOE DE-AC05-00OR22725.
NR 28
TC 9
Z9 9
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 AUG
PY 2008
VL 78
IS 5
AR 052410
DI 10.1103/PhysRevB.78.052410
PG 4
WC Physics, Condensed Matter
SC Physics
GA 350QM
UT WOS:000259368200017
ER

PT J
AU Shen, L
   Wu, RQ
   Pan, H
   Peng, GW
   Yang, M
   Sha, ZD
   Feng, YP
AF Shen, L.
   Wu, R. Q.
   Pan, H.
   Peng, G. W.
   Yang, M.
   Sha, Z. D.
   Feng, Y. P.
TI Mechanism of ferromagnetism in nitrogen-doped ZnO: First-principle
   calculations
SO PHYSICAL REVIEW B
LA English
DT Article
ID P-TYPE ZNO; MAGNETIC SEMICONDUCTORS; THIN-FILMS
AB Based on our first-principle calculations, ZnO doped by a nonmagnetic 2p light element (N) is predicted to be ferromagnetic. The local magnetic moments that are mainly localized on doped N atoms introduced total moments of 1.0 mu(B)/atom. The long-range magnetic coupling of N-doped ZnO can be attributed to a p-d exchange-like p-p coupling interaction involving holes, which is derived from the similar symmetry and wave function between the impurity (p-like t(2)) and valence (p) states. We also propose a codoping mechanism, using beryllium and nitrogen as dopants in ZnO, to enhance the ferromagnetic coupling and to increase the solubility and activity.
C1 [Shen, L.; Wu, R. Q.; Peng, G. W.; Yang, M.; Sha, Z. D.; Feng, Y. P.] Natl Univ Singapore, Fac Sci, Dept Phys, Singapore 117542, Singapore.
   [Shen, L.] Inst High Performance Comp, Singapore 138632, Singapore.
   [Pan, H.] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA.
RP Shen, L (reprint author), Natl Univ Singapore, Fac Sci, Dept Phys, Singapore 117542, Singapore.
EM phyfyp@nus.edu.sg
RI Pan, Hui/A-2702-2009; SHA, Zhendong/E-9463-2012; SHEN, LEI/G-1077-2012;
   Yang, Ming/G-1543-2012; Feng, Yuan Ping /A-4507-2012
OI Pan, Hui/0000-0002-6515-4970; SHEN, LEI/0000-0001-6198-5753; Yang,
   Ming/0000-0002-0876-1221; Feng, Yuan Ping /0000-0003-2190-2284
FU NUS Academic Research Fund [R144-000-182-112]
FX We thank Yang Shuo-Wang for the helpful discussions. The authors
   acknowledge the financial support from the NUS Academic Research Fund
   under Grant No. R144-000-182-112.
NR 31
TC 204
Z9 209
U1 4
U2 61
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 AUG
PY 2008
VL 78
IS 7
AR 073306
DI 10.1103/PhysRevB.78.073306
PG 4
WC Physics, Condensed Matter
SC Physics
GA 351EG
UT WOS:000259406700015
ER

PT J
AU Smerdon, JA
   Parle, JK
   Wearing, LH
   Lograsso, TA
   Ross, AR
   McGrath, R
AF Smerdon, J. A.
   Parle, J. K.
   Wearing, L. H.
   Lograsso, T. A.
   Ross, A. R.
   McGrath, R.
TI Nucleation and growth of a quasicrystalline monolayer: Bi adsorption on
   the fivefold surface of i-Al(70)Pd(21)Mn(9)
SO PHYSICAL REVIEW B
LA English
DT Article
ID AL70PD21MN9
AB Scanning tunneling microscopy has been used to study the formation of a Bi monolayer deposited on the fivefold surface of i-Al(70)Pd(21)Mn(9). Upon deposition of low submonolayer coverages, the nucleation of pentagonal clusters of Bi adatoms of edge length 4.9 angstrom is observed. The clusters have a, common orientation leading to a film with fivefold symmetry. By inspection of images where both the underlying surface and the Bi atoms are resolved, the pentagonal clusters are proposed to nucleate on pseudo-Mackay clusters truncated such that a Mn atom lies centrally in the surface plane. The density of these sites is sufficient to form a quasiperiodic framework, and subsequent adsorption of Bi atoms ultimately leads to the formation of a quasicrystalline monolayer. The suggested nucleation site is different from that proposed on the basis of recent density-functional theory calculations.
C1 [Smerdon, J. A.; Parle, J. K.; Wearing, L. H.; McGrath, R.] Univ Liverpool, Surface Sci Res Ctr, Liverpool L69 3BX, Merseyside, England.
   [Smerdon, J. A.; Parle, J. K.; Wearing, L. H.; McGrath, R.] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England.
   [Lograsso, T. A.; Ross, A. R.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
RP Smerdon, JA (reprint author), Univ Liverpool, Surface Sci Res Ctr, POB 147, Liverpool L69 3BX, Merseyside, England.
EM mcgrath@liv.ac.uk
RI McGrath, Ronan/A-1568-2009
OI McGrath, Ronan/0000-0002-9880-5741
FU EPSRC [EP/D05253X/1]
FX The EPSRC is acknowledged for funding this project under Grant No.
   EP/D05253X/1. Ed Boughton is acknowledged for assistance with data
   acquisition, and Kirsty Young is thanked for calculations of tile
   frequencies. Marian Krajci is thanked for providing the Al-Pd-Mn
   approximant surface structure models and for useful discussions.
NR 27
TC 28
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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 AUG
PY 2008
VL 78
IS 7
AR 075407
DI 10.1103/PhysRevB.78.075407
PG 6
WC Physics, Condensed Matter
SC Physics
GA 351EG
UT WOS:000259406700088
ER

PT J
AU Subedi, A
   Singh, DJ
   Du, MH
AF Subedi, Alaska
   Singh, David J.
   Du, Mao-Hua
TI Electron-phonon superconductivity in LaNiPO
SO PHYSICAL REVIEW B
LA English
DT Article
ID EARTH; METAL
AB We report first-principles calculations of the electronic structure, phonon dispersions, and electron-phonon coupling of LaNiPO. These calculations show that this material can be explained as a conventional electron-phonon superconductor in contrast to the FeAs based high-temperature superconductors.
C1 [Subedi, Alaska] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
   [Subedi, Alaska; Singh, David J.; Du, Mao-Hua] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Subedi, A (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RI Du, Mao-Hua/B-2108-2010; Singh, David/I-2416-2012
OI Du, Mao-Hua/0000-0001-8796-167X; 
FU DOE; Division of Materials Sciences and Engineering
FX We are grateful for discussions with I.I. Mazin, D.G. Mandrus, B.C.
   Sales, R. Jin, and M. Fornari and support from DOE, Division of
   Materials Sciences and Engineering.
NR 27
TC 29
Z9 29
U1 1
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD AUG
PY 2008
VL 78
IS 6
AR 060506
DI 10.1103/PhysRevB.78.060506
PG 4
WC Physics, Condensed Matter
SC Physics
GA 349EU
UT WOS:000259264900012
ER

PT J
AU Sun, Z
   Douglas, JF
   Wang, Q
   Dessau, DS
   Fedorov, AV
   Lin, H
   Sahrakorpi, S
   Barbiellini, B
   Markiewicz, RS
   Bansil, A
   Zheng, H
   Mitchell, JF
AF Sun, Z.
   Douglas, J. F.
   Wang, Q.
   Dessau, D. S.
   Fedorov, A. V.
   Lin, H.
   Sahrakorpi, S.
   Barbiellini, B.
   Markiewicz, R. S.
   Bansil, A.
   Zheng, H.
   Mitchell, J. F.
TI Electronic structure of the metallic ground state of
   La(2-2x)Sr(1+2x)Mn(2)O(7) for x approximate to 0.59 and comparison with
   x=0.36,0.38 compounds as revealed by angle-resolved photoemission
SO PHYSICAL REVIEW B
LA English
DT Article
ID COLOSSAL MAGNETORESISTIVE OXIDES; DOUBLE EXCHANGE; FERMI-SURFACE;
   LASR2MN2O7; MANGANITES; CHARGE
AB Using angle-resolved photoemission spectroscopy, we present the electronic structure of the metallic ground state of La(2-2x)Sr(1+2x)Mn(2)O(7) (x approximate to 0.59) and interpret the results in terms of first-principles band-structure computations, of which the generalized gradient approximation yields the best agreement with the experimental data. No bilayer-split bands are found in this compound, indicating the near degeneracy of electronic states in the neighboring MnO(2) layers due to its A-type antiferromagnetic structure. The d(3z2-r2) states near the zone center were not observed, which is also consistent with its A-type antiferromagnetic structure. Near the Fermi level, a kink in the dispersion reveals an important electron-phonon many-body interaction. The electron-phonon coupling is similar to 1 near the zone boundary and similar to 2 near the zone diagonal, showing strong k dependence.
C1 [Sun, Z.; Douglas, J. F.; Wang, Q.; Dessau, D. S.] Univ Colorado, Dept Phys, Boulder, CO 80309 USA.
   [Fedorov, A. V.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
   [Lin, H.; Sahrakorpi, S.; Barbiellini, B.; Markiewicz, R. S.; Bansil, A.] Northeastern Univ, Dept Phys, Boston, MA 02115 USA.
   [Zheng, H.; Mitchell, J. F.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Sun, Z (reprint author), Univ Colorado, Dept Phys, Boulder, CO 80309 USA.
EM dessau@colorado.edu
RI Wang, Qiang/K-3807-2012; Barbiellini, Bernardo/K-3619-2015; Lin,
   Hsin/F-9568-2012
OI Barbiellini, Bernardo/0000-0002-3309-1362; Lin, Hsin/0000-0002-4688-2315
FU U.S. National Science Foundation [DMR 0706657]; U.S. Department of
   Energy [DE-FG02-03ER46066, DE-AC02-05CH11231, DE-FG02-07ER46352,
   DE-AC03-76SF00098, DE-AC02-06CH11357]
FX Primary support for this work was from the U.S. National Science
   Foundation under Grant No. DMR 0706657, with supplementary support from
   the U.S. Department of Energy under Grant No. DE-FG02-03ER46066. The
   Advanced Light Source is supported by the Director, Office of Science,
   Office of Basic Energy Sciences, of the U.S. Department of Energy under
   Contract No. DE-AC02-05CH11231. The theoretical work was supported by
   the U.S. Department of Energy Contracts No. DE-FG02-07ER46352 and No.
   DE-AC03-76SF00098 and benefited from the allocation of supercomputer
   time at the NERSC and the Northeastern University's Advanced Scientific
   Computation Center (ASCC). Argonne National Laboratory, a U.S,
   Department of Energy Office of Science Laboratory, is operated under
   Contract No. DE-AC02-06CH11357.
NR 28
TC 14
Z9 14
U1 0
U2 12
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD AUG
PY 2008
VL 78
IS 7
AR 075101
DI 10.1103/PhysRevB.78.075101
PG 6
WC Physics, Condensed Matter
SC Physics
GA 351EG
UT WOS:000259406700023
ER

PT J
AU Svitelskiy, O
   Suslov, AV
   Betts, JB
   Migliori, A
   Yong, G
   Boatner, LA
AF Svitelskiy, O.
   Suslov, A. V.
   Betts, J. B.
   Migliori, A.
   Yong, G.
   Boatner, L. A.
TI Resonant ultrasound spectroscopy of KTa(1-x)Nb(x)O(3) ferroelectric
   relaxor crystals
SO PHYSICAL REVIEW B
LA English
DT Article
ID DIFFUSE PHASE-TRANSITION; ELASTIC PROPERTIES; NB IONS; PBMG1/3NB2/3O3;
   TEMPERATURE; SCATTERING; VELOCITY; KTAO3; KTN
AB The influence of the development of a ferroelectric state on the elastic properties of KTa(1-x)Nb(x)O(3) relaxor crystals is explored. The high sensitivity of the elastic stiffness tensor to the polar distortions and their reorientational dynamics is individual for each particular component: c(11) and c(44) are primarily influenced by the reorientational motion of the distortions between the nearest neighboring (111) directions; the c(12), however, depends primarily on the reorientations between the (111) directions neighboring along the cubic face diagonal. Consequently, the temperature behavior of c(12) demonstrates a different dependence on the Nb concentration than that of c(11) and c(44). In the 1.2% Nb crystal all three elastic coefficients clearly show a softening with the appearance of the dynamic polar distortions while, in the 16% Nb crystal this effect is strong for c(11) and c(44), but changes in c(12) occur only in the vicinity of the phase transition. Nevertheless, close to the transition the elastic properties become more isotropic for all three crystals. The curves of slowness and Young's modulus within the main crystallographic planes are presented and the linear compressibility modulus is estimated. The values of the Debye temperatures with an error of +/- 2 K are estimated to be approximately 594, 589, and 592 for the crystals containing 1.2, 8, and 16% of Nb, respectively.
C1 [Svitelskiy, O.; Suslov, A. V.] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
   [Betts, J. B.; Migliori, A.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Yong, G.] Towson Univ, Baltimore, MD 21252 USA.
   [Boatner, L. A.] Ctr Radiat Detect Mat & Syst, Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Svitelskiy, O (reprint author), Univ Alberta, Dept Phys, Edmonton, AB T6G 2G7, Canada.
RI CHEN, Jiangang/A-1549-2011; Suslov, Alexey/M-7511-2014; Boatner,
   Lynn/I-6428-2013
OI Suslov, Alexey/0000-0002-2224-153X; Boatner, Lynn/0000-0002-0235-7594
FU NSF [DMR-0084173]; In-House Research Program; U.S. Department of Energy
   [DE-AC05-00OR22725]; Oak Ridge National Laboratory
FX Authors are thankful to Scott Headley for helping with the experimental
   setup. The experiment has been performed at the NHMFL, which is
   supported by the NSF Cooperative Agreement No. DMR-0084173 and the State
   of Florida; The ultrasonic research at the NHMFL is supported by the
   In-House Research Program. Research at ORNL is sponsored by the Division
   of Materials Sciences and Engineering, Office of Basic Energy Sciences,
   U.S. Department of Energy, under Contract No. DE-AC05-00OR22725 with Oak
   Ridge National Laboratory, managed and operated by UT-Battelle, LLC.
NR 34
TC 9
Z9 9
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 AUG
PY 2008
VL 78
IS 6
AR 064113
DI 10.1103/PhysRevB.78.064113
PG 5
WC Physics, Condensed Matter
SC Physics
GA 349EU
UT WOS:000259264900028
ER

PT J
AU Takenaka, H
   Singh, DJ
AF Takenaka, H.
   Singh, D. J.
TI Positron potential and wave function in LaFeAsO
SO PHYSICAL REVIEW B
LA English
DT Article
ID MOMENTUM DENSITY; FERMI-SURFACE; ANNIHILATION; METALS; STATES
AB We report calculations of the positron potential and wave function in LaFeAsO. These calculations show that the positron wave function does sample the entire unit cell, although it is largest in the interstices of the La layer adjacent to As atoms. The implication is that annihilation correlation of annihilation radiation is a viable probe of the Fermi surfaces in this material. The results also apply to positive muons and indicate that these will be localized in the La layer adjacent to As.
C1 [Takenaka, H.; Singh, D. J.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Takenaka, H (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RI Singh, David/I-2416-2012
FU Department of Energy, Division of Materials Sciences and Engineering
FX We are grateful for helpful discussions with D. G. Mandrus and B. C.
   Sales. This work was supported by the Department of Energy, Division of
   Materials Sciences and Engineering.
NR 23
TC 8
Z9 9
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 AUG
PY 2008
VL 78
IS 5
AR 052503
DI 10.1103/PhysRevB.78.052503
PG 4
WC Physics, Condensed Matter
SC Physics
GA 350QM
UT WOS:000259368200020
ER

PT J
AU Tapp, JH
   Tang, ZJ
   Lv, B
   Sasmal, K
   Lorenz, B
   Chu, PCW
   Guloy, AM
AF Tapp, Joshua H.
   Tang, Zhongjia
   Lv, Bing
   Sasmal, Kalyan
   Lorenz, Berrid
   Chu, Paul C. W.
   Guloy, Arnold M.
TI LiFeAs: An intrinsic FeAs-based superconductor with Tc=18 K
SO PHYSICAL REVIEW B
LA English
DT Article
ID IRON; LAO1-XFXFEAS; PHOSPHIDES; ARSENIDES; COMPOUND
AB The synthesis and properties of LiFeAs, a high-T(c) Fe-based superconducting stoichiometric compound, are reported. Single crystal x-ray studies reveal that it crystallizes in the tetragonal PbFCl type (P4/nmm) with a=3.7914(7) angstrom and c=6.364(2) angstrom. Unlike the known isoelectronic undoped intrinsic FeAs Compounds, LiFeAs does not show any spin-density wave behavior but exhibits superconductivity at ambient pressures without chemical doping. It exhibits a respectable transition temperature of T(c)=18 K with electronlike carriers and a very high critical field, H(c2)(0)>80 T. LiFeAs appears to be the chemical equivalent of the infinite layered compound of the high-T(c) cuprates.
C1 [Tapp, Joshua H.; Tang, Zhongjia; Lv, Bing; Sasmal, Kalyan; Lorenz, Berrid; Chu, Paul C. W.; Guloy, Arnold M.] TCSUH, Houston, TX 77204 USA.
   [Tapp, Joshua H.; Tang, Zhongjia; Lv, Bing; Guloy, Arnold M.] Univ Houston, Dept Chem, Houston, TX 77204 USA.
   [Sasmal, Kalyan; Lorenz, Berrid; Chu, Paul C. W.] Univ Houston, Dept Phys, Houston, TX 77204 USA.
   [Chu, Paul C. W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [Chu, Paul C. W.] Hong Kong Univ Sci & Technol, Hong Kong, Hong Kong, Peoples R China.
RP Tapp, JH (reprint author), TCSUH, Houston, TX 77204 USA.
RI Lv, Bing/E-3485-2010
FU National Science Foundation [CHE-0616805]; R. A. Welch Foundation,;
   United States Air Force Office of Scientific Research; Lawrence Berkeley
   National Laboratory through the United States Department of Energy, and
   the State of Texas; T. L. L. Temple Foundation; J. J. and R. Moores
   Endowment
FX This work was supported by the National Science Foundation (Grant No.
   CHE-0616805), the R. A. Welch Foundation, the United States Air Force
   Office of Scientific Research, at Lawrence Berkeley National Laboratory
   through the United States Department of Energy, and the State of Texas
   through the Texas Center for Superconductivity. CW.C. also acknowledges
   support from the T. L. L. Temple Foundation, and the J. J. and R. Moores
   Endowment.
NR 20
TC 510
Z9 520
U1 6
U2 112
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 AUG
PY 2008
VL 78
IS 6
AR 060505
DI 10.1103/PhysRevB.78.060505
PG 4
WC Physics, Condensed Matter
SC Physics
GA 349EU
UT WOS:000259264900011
ER

PT J
AU Tran, TB
   Beloborodov, IS
   Hu, JS
   Lin, XM
   Rosenbaum, TF
   Jaeger, HM
AF Tran, T. B.
   Beloborodov, I. S.
   Hu, Jingshi
   Lin, X. M.
   Rosenbaum, T. F.
   Jaeger, H. M.
TI Sequential tunneling and inelastic cotunneling in nanoparticle arrays
SO PHYSICAL REVIEW B
LA English
DT Article
ID CHARGE; TRANSITION; TRANSPORT; SYSTEMS; METAL; DOTS
AB We investigate transport in weakly coupled metal nanoparticle arrays, focusing on the regime where tunneling is competing with strong single electron charging effects. This competition gives rise to an interplay between two types of charge transport. In sequential tunneling, transport is dominated by independent electron hops from a particle to its nearest neighbor along the current path. In inelastic cotunneling, transport is dominated by cooperative multielectron hops that each go to the nearest neighbor but are synchronized to move charge over distances of several particles. In order to test how the temperature-dependent cotunnel distance affects the current-voltage (I-V) characteristics, we perform a series of systematic experiments on highly ordered close-packed nanoparticle arrays. The arrays consist of similar to 5.5 nm diameter gold nanocrystals with tight size dispersion, spaced similar to 1.7 nm apart by interdigitating shells of dodecanethiol ligands. We present I-V data for monolayer, bilayer, trilayer, and tetralayer arrays. For stacks 2-4 layers thick we compare in-plane measurements with data for vertical transport perpendicular to the array plane. Our results support a picture whereby transport inside the Coulomb blockade regime occurs by inelastic cotunneling, while sequential tunneling takes over at large bias above the global Coulomb blockade threshold V(t)(T) and at high temperatures. For the smallest measurable voltages, our data was fitted well by recent predictions for the temperature dependence zero-bias conductance due to multiple cotunneling. At finite but small bias, the cotunnel distance is predicted to set the curvature of the nonlinear I-V characteristics, in good agreement with our data. The absence of significant magnetic-field dependence up to 10 T in the measured I-V characteristics further supports the picture of inelastic cotunneling events where individual electrons hop no further than the nearest neighbor. At large bias, above the global Coulomb blockade threshold, the I-V characteristics follow power-law behavior with temperature-independent exponent close to two, predicted for sequential tunneling along branching paths that optimize the overall charging energy cost.
C1 [Tran, T. B.; Beloborodov, I. S.; Hu, Jingshi; Rosenbaum, T. F.; Jaeger, H. M.] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA.
   [Rosenbaum, T. F.; Jaeger, H. M.] Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
   [Beloborodov, I. S.] Argonne Natl Lab, Div Sci Mat, Argonne, IL 60439 USA.
   [Lin, X. M.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Tran, TB (reprint author), Univ Chicago, James Franck Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA.
FU National Science Foundation [ECS-070178]; U.S. Army Research Laboratory
   [W911NF-07-2-0065]
FX Y.-J. Liu and Y.-P. Zhao acknowledge the support from National Science
   Foundation under Contract No. ECS-070178 and U.S. Army Research
   Laboratory under Grant No. W911NF-07-2-0065. The authors also
   acknowledge the fruitful discussions with Rich Dluhy. John Gibbs helped
   us to proofread the paper.
NR 37
TC 59
Z9 59
U1 1
U2 31
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 AUG
PY 2008
VL 78
IS 7
AR 075437
DI 10.1103/PhysRevB.78.075437
PG 9
WC Physics, Condensed Matter
SC Physics
GA 351EG
UT WOS:000259406700118
ER

PT J
AU Valvidares, SM
   Quiros, C
   Mirone, A
   Tonnerre, JM
   Stanescu, S
   Bencok, P
   Souche, Y
   Zarate, L
   Martin, JI
   Velez, M
   Brookes, NB
   Alameda, JM
AF Valvidares, S. M.
   Quiros, C.
   Mirone, A.
   Tonnerre, J. -M.
   Stanescu, S.
   Bencok, P.
   Souche, Y.
   Zarate, L.
   Martin, J. I.
   Velez, M.
   Brookes, N. B.
   Alameda, J. M.
TI Resolving antiferromagnetic states in magnetically coupled amorphous
   Co-Si-Si multilayers by soft x-ray resonant magnetic scattering
SO PHYSICAL REVIEW B
LA English
DT Article
ID EXCHANGE SCATTERING; FILMS; POLARIZATION; DIFFRACTION; FE
AB Soft x-ray resonant magnetic scattering (SXRMS) has been used to probe the interlayer coupling in amorphous ferromagnetic/semiconductor multilayers. It is shown that the [Co(73)Si(27) (50 angstrom)/Si (30 angstrom)] system exhibits an antiferromagnetic (AF) coupling at low fields. Moreover, another aspect of SXRMS effect is reported. Using circularly polarized photons, a shift in the AF order Bragg peaks' position is observed and related to two opposite AF states with the spin direction longitudinally aligned. As a consequence, the sensitivity of SXRMS to AF domains having the same spin axis but opposite senses is shown. A physical explanation for the origin of this effect is provided in terms of magnetic-resonant-refraction corrections to Bragg's angle, taking into account the phase shifts between layers with opposite magnetization directions at different in-depth positions. Numerical simulations are performed that reproduced the experimental observations.
C1 [Valvidares, S. M.; Mirone, A.; Stanescu, S.; Bencok, P.; Brookes, N. B.] European Synchrotron Radiat Facil, F-38043 Grenoble, France.
   [Quiros, C.; Zarate, L.; Martin, J. I.; Velez, M.; Alameda, J. M.] Univ Oviedo, CINN, Dept Fis, Oviedo 33007, Spain.
   [Tonnerre, J. -M.; Souche, Y.] CNRS, Inst Neel, F-38042 Grenoble, France.
   [Tonnerre, J. -M.; Souche, Y.] Univ Oviedo, CINN, F-38042 Grenoble 9, France.
RP Valvidares, SM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA.
EM smvalvidaressuarez@lbl.gov
RI Velez, Maria/A-2734-2012; Martin, Jose/C-5250-2013; Quiros,
   Carlos/E-5669-2016; Valvidares, Secundino /M-4979-2016; 
OI Velez, Maria/0000-0003-0311-7434; Martin, Jose/0000-0003-2256-0909;
   Quiros, Carlos/0000-0002-0591-5563; Valvidares, Secundino
   /0000-0003-4895-8114; Stanescu, Stefan/0000-0002-4543-1774
NR 38
TC 7
Z9 7
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 AUG
PY 2008
VL 78
IS 6
AR 064406
DI 10.1103/PhysRevB.78.064406
PG 7
WC Physics, Condensed Matter
SC Physics
GA 349EU
UT WOS:000259264900055
ER

PT J
AU Walsh, A
   Da Silva, JLF
   Wei, SH
AF Walsh, Aron
   Da Silva, Juarez L. F.
   Wei, Su-Huai
TI Origins of band-gap renormalization in degenerately doped semiconductors
SO PHYSICAL REVIEW B
LA English
DT Article
ID TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; OPTICAL-PROPERTIES; IN2O3;
   STATE; SNO2
AB Degenerate n-type doping of semiconductors results in optical band-gap widening through occupation of the conduction band, which is partially offset by the so-called band-gap renormalization. From investigation of the magnitude and origin of these shifts through density-functional band-structure theory, we demonstrate that the key contribution to renormalization arises from the nonparabolic nature of the host conduction band but not the rigid shift of the band edges, as is the current paradigm. Furthermore, the carrier dependence of the band-gap widening is highly sensitive to the electronic states of the dopant ion, which can be involved in a significant reconstruction of the lower conduction band.
C1 [Walsh, Aron; Da Silva, Juarez L. F.; Wei, Su-Huai] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Walsh, A (reprint author), Natl Renewable Energy Lab, 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
FU U.S. Department of Energy (DOE) [DE-AC36-99GO10337, DE-AC02-05CH11231]
FX We would like to thank R. G. Egdell for sharing his knowledge of doped
   semiconductors. The work at NREL is supported by the U.S. Department of
   Energy (DOE) under Contract No. DE-AC36-99GO10337. Computing resources
   of the National Energy Research Scientific Computing Center were
   employed, which is supported by DOE under Contract No.
   DE-AC02-05CH11231.
NR 39
TC 132
Z9 132
U1 4
U2 52
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD AUG
PY 2008
VL 78
IS 7
AR 075211
DI 10.1103/PhysRevB.78.075211
PG 5
WC Physics, Condensed Matter
SC Physics
GA 351EG
UT WOS:000259406700058
ER

PT J
AU Wu, YZ
   Zhao, Y
   Arenholz, E
   Young, AT
   Sinkovic, B
   Won, C
   Qiu, ZQ
AF Wu, Y. Z.
   Zhao, Y.
   Arenholz, E.
   Young, A. T.
   Sinkovic, B.
   Won, C.
   Qiu, Z. Q.
TI Analysis of x-ray linear dichroism spectra for NiO thin films grown on
   vicinal Ag(001)
SO PHYSICAL REVIEW B
LA English
DT Article
ID EXCHANGE BIAS; INELASTIC LIFETIMES; MAGNETIC DICHROISM; ANISOTROPY;
   ELECTRONS; MOMENTS; SURFACE; METALS; SILVER; FE
AB Antiferromagnetic (AFM) NiO thin films are grown epitaxially on vicinal Ag(118) substrate and investigated by x-ray linear dichroism (XLD). We find that the NiO AFM spins exhibit an in-plane spin-reorientation transition from parallel to perpendicular to the step edge direction with increasing the NiO film thickness. In addition to the conventional L-2 absorption edge, XLD effect at the Ni L-3 absorption edge is also measured and analyzed. The results identify a small energy shift of the L-3 peak. Temperature-dependent measurement confirms that the observed XLD effect in this system at the normal incidence of the x rays originates entirely from the NiO magnetic ordering.
C1 [Wu, Y. Z.] Fudan Univ, Dept Phys, Appl Surface Phys State Key Lab, Shanghai 200433, Peoples R China.
   [Wu, Y. Z.] Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China.
   [Wu, Y. Z.; Qiu, Z. Q.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   [Zhao, Y.; Sinkovic, B.] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA.
   [Arenholz, E.; Young, A. T.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [Won, C.] Kyung Hee Univ, Dept Phys, Seoul 130701, South Korea.
RP Wu, YZ (reprint author), Fudan Univ, Dept Phys, Appl Surface Phys State Key Lab, Shanghai 200433, Peoples R China.
EM wuyizheng@fudan.edu.cn
RI wu, YiZheng/O-1547-2013; Wu, yizheng/P-2395-2014; Qiu, Zi
   Qiang/O-4421-2016
OI Wu, yizheng/0000-0002-9289-1271; Qiu, Zi Qiang/0000-0003-0680-0714
FU National Science Foundation [DMR-0405259]; U.S. Department of Energy
   [DE-AC03-76SF00098]; National Natural Science Foundation of China
   [2006CB921303]; Shanghai Education Development Foundation; Fok Ying Tong
   education foundation
FX This work was supported by National Science Foundation under Grant No.
   DMR-0405259, by U.S. Department of Energy under Grant No.
   DE-AC03-76SF00098, by National Natural Science Foundation of China
   (973-project) under Grant No. 2006CB921303, by Shanghai Education
   Development Foundation, and by Fok Ying Tong education foundation.
NR 29
TC 15
Z9 16
U1 1
U2 14
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 AUG
PY 2008
VL 78
IS 6
AR 064413
DI 10.1103/PhysRevB.78.064413
PG 6
WC Physics, Condensed Matter
SC Physics
GA 349EU
UT WOS:000259264900062
ER

PT J
AU Yang, SY
   Zhang, LX
   Chen, H
   Wang, EG
   Zhang, ZY
AF Yang, Shenyuan
   Zhang, Lixin
   Chen, Hua
   Wang, Enge
   Zhang, Zhenyu
TI Generic guiding principle for the prediction of metal-induced
   reconstructions of compound semiconductor surfaces
SO PHYSICAL REVIEW B
LA English
DT Article
ID SCANNING-TUNNELING-MICROSCOPY; INITIO MOLECULAR-DYNAMICS; AUGMENTED-WAVE
   METHOD; GAAS(110) SURFACE; GAAS(001) SURFACES; INAS(110) SURFACE;
   SCHOTTKY-BARRIER; ATOMIC-STRUCTURE; INGAAS ALLOYS; CS
AB We have performed extensive and systematic ab initio calculations to substantiate a recently proposed generalized electron counting (GEC) rule that governs the rich patterns of compound semiconductor reconstruction induced by metal adsorption. In this rule, the metal adsorbates serve as an electron bath, either donating or accepting the right number of electrons, with which the binary host system chooses a specific reconstruction under the classic electron counting rule and, meanwhile, the adsorbates stay in their optimal valency. The GEC rule is applied to different GaAs surfaces deposited by various classes of metal adsorbates, leading to a number of possible reconstructions, which can be further confirmed by first-principles calculations and/or experiments. The alkali-metal adsorption on the GaAs(110) surface up to the saturate coverage is a perfect example of the GEC rule. The application of the GEC rule to the prototype system of Mn/GaAs(001) not only predicts possible reconstruction patterns over a wide range of coverage but also provides an underlying link between the reconstruction Structures and the local magnetic moments of the metal adsorbates. For Au/GaAs(100), we demonstrate the application of the GEC rule to those systems where metal adsorbates form covalent bonds with the substrate. The GEC rule, as a generic principle, is expected to be! applicable to more metal-adsorbed compound semiconductor surfaces.
C1 [Yang, Shenyuan; Zhang, Lixin; Wang, Enge] Chinese Acad Sci, Int Ctr Quantum Struct, Beijing 100190, Peoples R China.
   [Yang, Shenyuan; Zhang, Lixin; Wang, Enge] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
   [Yang, Shenyuan; Chen, Hua; Zhang, Zhenyu] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
   [Zhang, Zhenyu] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Yang, SY (reprint author), Chinese Acad Sci, Int Ctr Quantum Struct, Beijing 100190, Peoples R China.
RI Chen, Hua/H-3092-2013
OI Chen, Hua/0000-0003-0676-3079
FU NSFC; MOST; CAS in China; US DOE [DE-AC05-00OR22725]; NSF [DMR0606485]
FX This work was supported by NSFC, MOST, and CAS in China, and partly
   supported by the US DOE (Contract No. DE-AC05-00OR22725) and US NSF
   (Grant No. DMR0606485).
NR 68
TC 13
Z9 13
U1 1
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 AUG
PY 2008
VL 78
IS 7
AR 075305
DI 10.1103/PhysRevB.78.075305
PG 12
WC Physics, Condensed Matter
SC Physics
GA 351EG
UT WOS:000259406700063
ER

PT J
AU Zhang, JZ
   Zhao, Y
   Hixson, RS
   Gray, GT
   Wang, LP
   Utsumi, W
   Hiroyuki, S
   Takanori, H
AF Zhang, Jianzhong
   Zhao, Yusheng
   Hixson, Robert S.
   Gray, George T., III
   Wang, Liping
   Utsumi, Wataru
   Hiroyuki, Saito
   Takanori, Hattori
TI Thermal equations of state for titanium obtained by high pressure -
   temperature diffraction studies
SO PHYSICAL REVIEW B
LA English
DT Article
ID OF-STATE; STRUCTURAL STABILITY; CRYSTAL-STRUCTURE; PHASE; METAL;
   MOLYBDENUM; TRANSITION; ZIRCONIUM; HAFNIUM; SOLIDS
AB We have conducted in situ high-pressure diffraction experiments on titanium metal at pressures up to 8.2 GPa and temperatures up to 900 K. From the pressure (P)-volume (V)-temperature (T) measurements, thermoelastic parameters were derived for alpha titanium based on a modified high-T Birch-Mumaghan equation of state and a thermal pressure approach. With the pressure derivative of the bulk modulus, K(0)('), fixed at 4.0, we obtained: ambient bulk modulus K(0) = 114(3) GPa, temperature derivative of bulk modulus at constant pressure (partial derivative K/partial derivative T)(P) = -1.1(7) X 10(-2) GPa K(-1) and at constant volume (partial derivative K/partial derivative T)(V) = -9.0 X 10(-4) GPa K(-1), volumetric thermal expansivity alpha(T) = alpha+bT with a = 1.2(+/- 0.6) X 10(-5) K(-1) and b = 2.5(+/- 1.1) X 10(-8) K(-2), and the pressure derivative of thermal expansion (partial derivative alpha/partial derivative P)(T) = -8-5 X 10(-7) GPa(-1) K(-1). The ambient bulk modulus and volumetric thermal expansion derived from this work are in good agreement with previous experimental results, whereas all other thermoelastic parameters represent the first determinations for the alpha phase of titanium. For the omega-phase Ti, we obtained K(0) = 107(3) GPa and volumetric thermal expansivity at 8.1 GPa alpha(T) = a+bT with a = 6.5 (+/- 3.5) X 10(-6) K(-1) and b = 2.8(+/- 0.6) X 10(-8) K(-2), Within the experimental uncertainties, the c/a ratios for alpha-Ti at both room and high temperatures remain constant over the experimental pressures up to 7.8 GPa, presenting a case against the isotropic force potential used in some theoretical modeling for hcp metals under high pressures.
C1 [Zhang, Jianzhong; Zhao, Yusheng; Hixson, Robert S.; Gray, George T., III] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Wang, Liping] SUNY Stony Brook, Inst Mineral Phys, Stony Brook, NY 11794 USA.
   [Utsumi, Wataru; Hiroyuki, Saito; Takanori, Hattori] Japan Atom Energy Res Inst, Synchrotron Radiat Res Ctr, Mikazuki, Hyogo 6795148, Japan.
RP Zhang, JZ (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM jzhang@lanl.gov
RI Lujan Center, LANL/G-4896-2012; 
OI Zhang, Jianzhong/0000-0001-5508-1782
FU Los Alamos National Laboratory; NSF Cooperative Agreement [EAR
   01-35554]; Synchrotron Radiation Research Center; Japan Atomic Energy
   Research Institute
FX This research was supported by the Los Alamos National Laboratory, which
   is operated by Los Alamos National Security LLC under DOE Contract No.
   DE-AC52-06NA25396. The experimental work was carried out at the beamline
   X17132 of National Synchrotron Light Source of Brookhaven National
   Laboratory, which was supported by the Consortium for Materials
   Properties Research in Earth Sciences (COMPRES) under NSF Cooperative
   Agreement EAR 01-35554, and at the beamline BL14B1 of SPring-8, which
   was supported by Synchrotron Radiation Research Center, Japan Atomic
   Energy Research Institute.
NR 33
TC 27
Z9 28
U1 1
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 AUG
PY 2008
VL 78
IS 5
AR 054119
DI 10.1103/PhysRevB.78.054119
PG 7
WC Physics, Condensed Matter
SC Physics
GA 350QM
UT WOS:000259368200045
ER

PT J
AU Bender, M
   Heenen, PH
AF Bender, Michael
   Heenen, Paul-Henri
TI Configuration mixing of angular-momentum and particle-number projected
   triaxial Hartree-Fock-Bogoliubov states using the Skyrme energy density
   functional
SO PHYSICAL REVIEW C
LA English
DT Article
ID GENERATOR-COORDINATE METHOD; HIGH-SPIN STATES; SELF-CONSISTENT;
   MEAN-FIELD; NUCLEAR-STRUCTURE; WAVE-FUNCTIONS; OCTUPOLE CORRELATIONS;
   QUADRUPOLE DYNAMICS; COLLECTIVE MOTION; ROTATIONAL STATES
AB We present a method based on mean-field states generated by triaxial quadrupole constraints that are projected on particle number and angular momentum and mixed by the generator coordinate method on the quadrupole moment. This method is equivalent to a seven-dimensional GCM calculation, mixing all five degrees of freedom of the quadrupole operator and the gauge angles for protons and neutrons. A first application to (24)Mg pen-nits a detailed analysis of the effects of triaxial deformations and of K mixing.
C1 [Bender, Michael; Heenen, Paul-Henri] Univ Libre Bruxelles, Serv Phys Nucl Theor, B-1050 Brussels, Belgium.
   [Bender, Michael] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA.
   [Bender, Michael] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   [Bender, Michael] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA.
   [Bender, Michael] CEA Saclay, DAPNIA, SPhN, F-91191 Gif Sur Yvette, France.
   [Bender, Michael] Univ Bordeaux, CEN Bordeaux Gradignan, UMR5797, F-33175 Gradignan, France.
   [Bender, Michael] CEN Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France.
RP Bender, M (reprint author), Univ Libre Bruxelles, Serv Phys Nucl Theor, CP 229, B-1050 Brussels, Belgium.
RI Bender, Michael/B-9004-2009; 
OI Heenen, Paul Henri/0000-0003-2357-8465
NR 88
TC 126
Z9 127
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD AUG
PY 2008
VL 78
IS 2
AR 024309
DI 10.1103/PhysRevC.78.024309
PG 16
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700024
ER

PT J
AU Dragojevic, I
   Gregorich, KE
   Dullmann, CE
   Garcia, MA
   Gates, M
   Nelson, SL
   Stavsetra, L
   Sudowe, R
   Nitsche, H
AF Dragojevic, I.
   Gregorich, K. E.
   Duellmann, Ch. E.
   Garcia, M. A.
   Gates, M.
   Nelson, S. L.
   Stavsetra, L.
   Sudowe, R.
   Nitsche, H.
TI Influence of projectile neutron number in the Pb-208(Ti-48,n)(255)Rf and
   Pb-208(Ti-50,n)(257)Rf reactions
SO PHYSICAL REVIEW C
LA English
DT Article
ID DECAY PROPERTIES; ISOTOPES; ELEMENTS; FISSION; FUSION; MODEL
AB Four isotopes of rutherfordium, (254-257)Rf, were produced by the Pb-208(Ti-48, xn)(256-x)Rf and Pb-208(Ti-50, xn)(258-x)Rf reactions (x = 1, 2) at the Lawrence Berkeley National Laboratory 88-Inch Cyclotron. Excitation functions were measured for the 1n and 2n exit channels. A maximum likelihood technique, which correctly accounts for the changing cross section at all energies subtended by the targets, was used to fit the lit data to allow a more direct comparison between excitation functions obtained under different experimental conditions. The maximum 1n cross sections of the Ph-208(Ti-48, n)(255)Rf and Pb-208(Ti-50, n)(257)Rf reactions obtained from fits to the experimental data are 0.38 +/- 0.07 nb and 40 +/- 5 nb, respectively. Excitation functions for the 2n exit channel were also measured, with maximum cross sections of 0.40(-0.17)(+0.27) nb for the Ti-48 induced reaction. and 15.7 +/- 0.2 nb for the "Ti induced reaction. The impact of the two neutron difference in the projectile on the In cross section is discussed. The results are compared to the Fusion by Diffusion model developed by Swiatecki, Wilczynska, and Wilczynski.
C1 [Dragojevic, I.; Duellmann, Ch. E.; Garcia, M. A.; Gates, M.; Nelson, S. L.; Nitsche, H.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Dragojevic, I.; Gregorich, K. E.; Duellmann, Ch. E.; Garcia, M. A.; Gates, M.; Nelson, S. L.; Stavsetra, L.; Sudowe, R.; Nitsche, H.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
   [Duellmann, Ch. E.] Gesell Schwerionenforsch mbH, Abt Kernchem, D-64291 Darmstadt, Germany.
RP Dragojevic, I (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
NR 37
TC 31
Z9 31
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD AUG
PY 2008
VL 78
IS 2
AR 024605
DI 10.1103/PhysRevC.78.024605
PG 7
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700035
ER

PT J
AU Durand, J
   Julia-Diaz, B
   Lee, TSH
   Saghai, B
   Sato, T
AF Durand, J.
   Julia-Diaz, B.
   Lee, T. -S. H.
   Saghai, B.
   Sato, T.
TI Coupled-channels study of the pi(-)p ->eta n process
SO PHYSICAL REVIEW C
LA English
DT Article
ID NUCLEON RESONANCE REGION; CONSTITUENT QUARK-MODEL; REACTION
   NEAR-THRESHOLD; WAVE SCATTERING LENGTH; PI-N SCATTERING; MESON
   PRODUCTION; ETA-N; CROSS-SECTIONS; BARYON RESONANCES; PARTICLE PHYSICS
AB The reaction pi(-)p ->eta n is investigated within a dynamical coupled-channels model of meson production reactions in the nucleon resonance region. The meson baryon channels included are phi N, eta N, pi A, sigma N, and rho N. The nonresonant meson-baryon interactions of the model tire derived from a set of Lagrangians by using a unitary transformation method. One or two excited nucleon states in each of S, P, D, and F partial waves are included to generate the resonant amplitudes. Data of the pi(-)p ->eta n. iln reaction from threshold up to a total center-of-mass energy of about 2 GeV are satisfactorily reproduced and the roles played by the following nine nucleon resonances are investigated: S-11(1535), S-11(1650), P-11(1440), P-11(1710), P-13(1720), D-13(1520), D-13(1700), D-15(1675), and F-15(1680). The reaction mechanism and the predicted eta N scattering length are discussed.
C1 [Durand, J.; Saghai, B.] CEA Saclay, DSM IRFU, Inst Rech Lois Fondamentales Univers, F-91191 Gif Sur Yvette, France.
   [Julia-Diaz, B.] Univ Barcelona, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain.
   [Julia-Diaz, B.] Univ Barcelona, Inst Ciencias Cosmos, E-08028 Barcelona, Spain.
   [Julia-Diaz, B.; Lee, T. -S. H.; Sato, T.] Thomas Jefferson Natl Accelerator Facil, Excited Baryon Anal Ctr, Newport News, VA 22901 USA.
   [Lee, T. -S. H.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   [Sato, T.] Osaka Univ, Dept Phys, Osaka 5600043, Japan.
RP Durand, J (reprint author), CEA Saclay, DSM IRFU, Inst Rech Lois Fondamentales Univers, F-91191 Gif Sur Yvette, France.
RI Julia-Diaz, Bruno/E-5825-2010; 
OI Julia-Diaz, Bruno/0000-0002-0145-6734; Saghai, Bijan/0000-0002-9406-4843
FU MEC (Spain) [FIS2005-03142]; FEDER; European Hadron Physics Project
   [RII3-CT-2004-506078]; U.S. Department of Energy, Office of Nuclear
   Physics Division [DE-AC02-06CH 11357, DE-AC05-060R23177]; Japan Society
   for the Promotion of Science [20540270]; Japanese Society for the
   Promotion of Science (JSPS) [PE 07021]
FX We are grateful to Bill Briscoe and Ben Nefkens for enlightening
   discussions on the status of data. The authors thankfully acknowledge
   the computer resources, technical expertise, and assistance provided by
   the Barcelona Super-computing Center-Centro Nacional de Supercomputacion
   (Spain) and NERSC (USA). B.J.-D. thanks the members of the nuclear
   theory group at Osaka University for their warm hospitality. This work
   is partially supported by Grant No. FIS2005-03142 from MEC (Spain) and
   FEDER and the European Hadron Physics Project No. RII3-CT-2004-506078 by
   the U.S. Department of Energy, Office of Nuclear Physics Division, under
   Contract No. DE-AC02-06CH 11357 and Contract No. DE-AC05-060R23177,
   under which Jefferson Science Associates operates Jefferson Lab, and by
   the Japan Society for the Promotion of Science, Grant-in-Aid for
   Scientific Research (c)20540270. B.J.-D. acknowledges the support of the
   Japanese Society for the Promotion of Science (JSPS). Grant No. PE
   07021.
NR 81
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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 2469-9985
EI 2469-9993
J9 PHYS REV C
JI Phys. Rev. C
PD AUG
PY 2008
VL 78
IS 2
AR 025204
DI 10.1103/PhysRevC.78.025204
PG 12
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700057
ER

PT J
AU Esbensen, H
AF Esbensen, H.
TI Coulomb excitation at intermediate energies
SO PHYSICAL REVIEW C
LA English
DT Article
AB Straight line trajectories are commonly used in semiclassical calculations of the first-order Coulomb excitation cross section at intermediate energies, and simple corrections are often made for the distortion of the trajectories that is caused by the Coulomb field. These approximations are tested by comparing to numerical calculations that use exact Coulomb trajectories. In this paper a model is devised for including relativistic effects in the calculations. It converges at high energies toward the relativistic straight-line trajectory approximation and approaches the non-relativistic Coulomb trajectory calculation at low energies. The model is tested against a number of measurements and analyses that have been performed at beam energies between 30 and 70 MeV/nucleon, primarily of quadrupole excitations. Remarkably good agreement is achieved with the previous analyses, and good agreement is also achieved in the few cases, where the B(E lambda) value is known from other methods. The magnitudes of the relativistic and Coulomb distortion effects are discussed.
C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Esbensen, H (reprint author), Argonne Natl Lab, Div Phys, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 18
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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 AUG
PY 2008
VL 78
IS 2
AR 024608
DI 10.1103/PhysRevC.78.024608
PG 11
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700038
ER

PT J
AU Fallis, J
   Clark, JA
   Sharma, KS
   Savard, G
   Buchinger, F
   Caldwell, S
   Crawford, JE
   Deibel, CM
   Fisker, JL
   Gulick, S
   Hecht, AA
   Lascar, D
   Lee, JKP
   Levand, AF
   Li, G
   Lundgren, BF
   Parikh, A
   Russell, S
   de Vorst, MSV
   Scielzo, ND
   Segel, RE
   Sharma, H
   Sinha, S
   Sternberg, M
   Sun, T
   Tanihata, I
   Van Schelt, J
   Wang, JC
   Wang, Y
   Wrede, C
   Zhou, Z
AF Fallis, J.
   Clark, J. A.
   Sharma, K. S.
   Savard, G.
   Buchinger, F.
   Caldwell, S.
   Crawford, J. E.
   Deibel, C. M.
   Fisker, J. L.
   Gulick, S.
   Hecht, A. A.
   Lascar, D.
   Lee, J. K. P.
   Levand, A. F.
   Li, G.
   Lundgren, B. F.
   Parikh, A.
   Russell, S.
   de Vorst, M. Scholte-van
   Scielzo, N. D.
   Segel, R. E.
   Sharma, H.
   Sinha, S.
   Sternberg, M.
   Sun, T.
   Tanihata, I.
   Van Schelt, J.
   Wang, J. C.
   Wang, Y.
   Wrede, C.
   Zhou, Z.
TI Determination of the proton separation energy of Rh-93 from mass
   measurements
SO PHYSICAL REVIEW C
LA English
DT Article
ID PENNING TRAP; NUCLEOSYNTHESIS
AB The proposed vp process, which occurs in the early time proton-rich neutrino winds of core-collapse supernovae, has the potential to resolve the long-standing uncertainty in the production of the light p-nuclei Mo-92 and Mo-94. A recent study incorporating this vp process has indicated that the proton separation energy SP of Rh-93 is especially important in determining the relative production of these two isotopes. To reproduce the observed solar Mo-92/Mo-94 abundance ratio of 1.57 a S-p value for Rh-93 of 1.64 +/- 0.1 MeV is required. The previously unknown masses of Ru-92 and Rh-93 have been measured with the Canadian Penning Trap mass spectrometer resulting in an experimental value for S-p(Rh-93) of 2.007 +/- 0.009 MeV. This implies that with our current understanding of the conditions in core-collapse supernova explosions the vp process is not solely responsible for the observed solar Mo-92/(94) Mo abundance ratio.
C1 [Fallis, J.; Clark, J. A.; Sharma, K. S.; Russell, S.; de Vorst, M. Scholte-van; Sharma, H.; Wang, J. C.; Wang, Y.] Univ Manitoba, Dept Phys, Winnipeg, MB R3T 2N2, Canada.
   [Fallis, J.; Clark, J. A.; Savard, G.; Caldwell, S.; Crawford, J. E.; Hecht, A. A.; Lascar, D.; Levand, A. F.; Li, G.; Lundgren, B. F.; Russell, S.; de Vorst, M. Scholte-van; Scielzo, N. D.; Sharma, H.; Sinha, S.; Sternberg, M.; Sun, T.; Tanihata, I.; Van Schelt, J.; Wang, J. C.; Wang, Y.; Zhou, Z.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   [Clark, J. A.; Deibel, C. M.; Wrede, C.] Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA.
   [Savard, G.; Caldwell, S.; Sternberg, M.; Van Schelt, J.] Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
   [Buchinger, F.; Crawford, J. E.; Gulick, S.; Lee, J. K. P.; Li, G.] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
   [Fisker, J. L.; Scielzo, N. D.] Lawrence Livermore Natl Lab, Phys Sci Directorate, Livermore, CA 94550 USA.
   [Hecht, A. A.] Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA.
   [Lascar, D.; Segel, R. E.] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
   [Parikh, A.] Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany.
RP Fallis, J (reprint author), Univ Manitoba, Dept Phys, Winnipeg, MB R3T 2N2, Canada.
RI Crawford, John/A-3771-2012
FU NSERC [216974]; U.S. Department of Energy [DE-AC02-06CH 11357]; Argonne
   National Laboratory [DE-FG02-91ER-40609, DE-FG02-98ER41086];
   Northwestern University [DE-AC52-07NA27344]; Lawrence Livermore National
   Laboratory
FX This work was supported by NSERC, Canada, application number 216974, and
   the U.S. Department of Energy, Office of Nuclear Physics, under Contract
   Nos. DE-AC02-06CH 11357 (Argonne National Laboratory),
   DE-FG02-91ER-40609 (Yale University), DE-FG02-98ER41086 (Northwestern
   University), and DE-AC52-07NA27344 (Lawrence Livermore National
   Laboratory). AP acknowledges support from the DFG Cluster of Excellence
   "Origin and Structure of the Universe." We also thank John Greene for
   his target making expertise, as well as all the operators and technical
   staff of the ATLAS accelerator at Argonne National Laboratory.
NR 22
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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 AUG
PY 2008
VL 78
IS 2
AR 022801
DI 10.1103/PhysRevC.78.022801
PG 4
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700010
ER

PT J
AU Greenlees, PT
   Herzberg, RD
   Ketelhut, S
   Butler, PA
   Chowdhury, P
   Grahn, T
   Gray-Jones, C
   Jones, GD
   Jones, P
   Julin, R
   Juutinen, S
   Khoo, TL
   Leino, M
   Moon, S
   Nyman, M
   Pakarinen, J
   Rahkila, P
   Rostron, D
   Saren, J
   Scholey, C
   Sorri, J
   Tandel, SK
   Uusitalo, J
   Venhart, M
AF Greenlees, P. T.
   Herzberg, R. -D.
   Ketelhut, S.
   Butler, P. A.
   Chowdhury, P.
   Grahn, T.
   Gray-Jones, C.
   Jones, G. D.
   Jones, P.
   Julin, R.
   Juutinen, S.
   Khoo, T. -L.
   Leino, M.
   Moon, S.
   Nyman, M.
   Pakarinen, J.
   Rahkila, P.
   Rostron, D.
   Saren, J.
   Scholey, C.
   Sorri, J.
   Tandel, S. K.
   Uusitalo, J.
   Venhart, M.
TI High-K structure in (250)Fm and the deformed shell gaps at N=152 and
   Z=100
SO PHYSICAL REVIEW C
LA English
DT Article
ID HEAVY-ELEMENTS; GREAT SPECTROMETER; HEAVIEST ELEMENTS; DECAY;
   SPECTROSCOPY; ISOMERS; STATES
AB The structure of high-spin and nonyrast states of the transfermium nucleus (250)Fm has been studied in detail. The isomeric nature of a two-quasiparticle excitation has been exploited in order to obtain spectroscopic data of exceptional quality. The data allow the configuration of an isomer first discovered over 30 years ago to be deduced, and provide an unambiguous determination of the location of neutron single-particle states in a very heavy nucleus. A comparison to the known two-quasiparticle structure of (254.252)No confirms the existence of the deformed shell gaps at N = 152 and Z = 100.
C1 [Greenlees, P. T.; Ketelhut, S.; Grahn, T.; Jones, P.; Julin, R.; Juutinen, S.; Leino, M.; Nyman, M.; Rahkila, P.; Saren, J.; Scholey, C.; Sorri, J.; Uusitalo, J.] Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland.
   [Herzberg, R. -D.; Butler, P. A.; Gray-Jones, C.; Jones, G. D.; Moon, S.; Pakarinen, J.; Rostron, D.] Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England.
   [Chowdhury, P.; Tandel, S. K.] Univ Massachusetts, Dept Phys, Lowell, MA 01854 USA.
   [Khoo, T. -L.] Argonne Natl Lab, Argonne, IL 60439 USA.
   [Venhart, M.] Comenius Univ, Dept Nucl Phys & Biophys, Bratislava 84248, Slovakia.
RP Greenlees, PT (reprint author), Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland.
EM ptg@phys.jyu.fi
RI Pakarinen, Janne/F-6695-2010; Herzberg, Rolf-Dietmar/E-1558-2011;
   Scholey, Catherine/G-2720-2014
OI Pakarinen, Janne/0000-0001-8944-8757; Scholey,
   Catherine/0000-0002-8743-6071
FU Slovak Research and Development Agency [APVV-20-006205]; U.K./France
   [EPSRC/IN2P3]
FX the Slovak Research and Development Agency (Contract No.
   APVV-20-006205). We also thank the U.K./France (EPSRC/IN2P3) detector
   Loan Pool, the gamma-pool network and GSI for the use of detectors.
   Enlightening discussions with P.-H. Heenen, A Bender, and J. Dobaczewski
   are gratefully acknowledged.
NR 33
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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 AUG
PY 2008
VL 78
IS 2
AR 021303
DI 10.1103/PhysRevC.78.021303
PG 5
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700004
ER

PT J
AU Guzey, V
AF Guzey, V.
TI Neutron contribution to nuclear deeply virtual Compton scattering
   asymmetries
SO PHYSICAL REVIEW C
LA English
DT Article
ID GENERALIZED PARTON DISTRIBUTIONS; HARD EXCLUSIVE ELECTROPRODUCTION;
   ELASTIC ELECTRON-SCATTERING; MESONS; PIONS; DEUTERON; QCD
AB Using a simple model for nuclear generalized parton distributions (GPDs), we study the role of the neutron contribution to nuclear deeply virtual Compton scattering (DVCS) observables. As an example, we use the beam-spin asymmetry A(LU)(A) measured in coherent and incoherent DVCS on a wide range of nuclear targets in the HERMES and JLab kinematics. We find that at small values of the momentum transfer t, A(LU)(A) is dominated by the coherent-entiched contribution, which enhances A(LU)(A) compared to the free proton asymmetry A(LU)(P) A(LU)(A) (phi)/A(LU)(p)(phi)= 1.8-2.2. At large values of t, the nuclear asymmetry is dominated by the incoherent contribution and A(LU)(A)/(phi)A(LU)(p)(phi) = 0.66-0.74. The deviation of A(LU)(A)(phi)/A(LU)(p)(phi) from unity at large t is a result of the neutron contribution, which gives a possibility to constrain neutron GPDs in incoherent nuclear DVCS. A similar trend is expected for other DVCS asymmetries.
C1 Jefferson Lab, Ctr Theory, Newport News, VA 23606 USA.
RP Guzey, V (reprint author), Jefferson Lab, Ctr Theory, Newport News, VA 23606 USA.
EM vguzey@jlab.org
OI Guzey, Vadim/0000-0002-2393-8507
FU Jefferson Science Associates, LLC [DE-AC05-06OR23177]
FX We would like to thank H. Egiyan, F. X. Girod, H. Guler, K. Hafidi, D.
   Hash, M. Strikman, and H. Ye for useful and encouraging discussions.
   Authored by Jefferson Science Associates, LLC under U.S. DOE Contract
   No. DE-AC05-06OR23177.
NR 55
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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 AUG
PY 2008
VL 78
IS 2
AR 025211
DI 10.1103/PhysRevC.78.025211
PG 11
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700064
ER

PT J
AU Hayes, AC
   Friar, JL
   Moller, P
AF Hayes, A. C.
   Friar, J. L.
   Moller, P.
TI Splitting sensitivity of the ground and 7.6 eV isomeric states of
   (229)Th
SO PHYSICAL REVIEW C
LA English
DT Article
ID NUCLEAR; TRANSITION; MASSES
AB The lowest-known excited state in nuclei is the 7.6 eV. isomer of (229)Th. This energy is within the range of laser-based investigations that could allow accurate measurements of possible temporal variation of this energy splitting. This in turn could probe temporal variation of the fine-structure constant or other parameters in the nuclear Hamiltonian. We investigate the sensitivity of this transition energy to these quantities. We find that the two states are predicted to have identical deformations and thus the same Coulomb energies within the accuracy of the model (viz., within roughly 30 keV). We therefore find no enhanced sensitivity to variation of the fine-structure constant. In the case of the strong interaction the energy splitting is found to have a complicated dependence on several parameters of the interaction, which makes an accurate prediction of sensitivity to temporal changes of fundamental constants problematical. Neither the strong- nor Coulomb-interaction contributions to the energy splitting of this doublet can be constrained within an accuracy better than a few tens of keV, so that only upper limits can be set on the possible sensitivity to temporal variations of the fundamental constants.
C1 [Hayes, A. C.; Friar, J. L.; Moller, P.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Hayes, AC (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
NR 10
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PU AMER PHYSICAL SOC
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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 AUG
PY 2008
VL 78
IS 2
AR 024311
DI 10.1103/PhysRevC.78.024311
PG 4
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700026
ER

PT J
AU Iwasa, N
   Motobayashi, T
   Bishop, S
   Elekes, Z
   Gibelin, J
   Hosoi, M
   Ieki, K
   Ishikawa, K
   Iwasaki, H
   Kawai, S
   Kubono, S
   Kurita, K
   Kurokawa, M
   Matsui, N
   Minemura, T
   Morikawa, H
   Nakamura, T
   Niikura, M
   Notani, M
   Ota, S
   Saito, A
   Sakurai, H
   Shimoura, S
   Sugawara, K
   Sugimoto, T
   Suzuki, H
   Suzuki, T
   Tanihata, I
   Takeshita, E
   Teranishi, T
   Togano, Y
   Yamada, K
   Yamaguchi, K
   Yanagisawa, Y
AF Iwasa, N.
   Motobayashi, T.
   Bishop, S.
   Elekes, Z.
   Gibelin, J.
   Hosoi, M.
   Ieki, K.
   Ishikawa, K.
   Iwasaki, H.
   Kawai, S.
   Kubono, S.
   Kurita, K.
   Kurokawa, M.
   Matsui, N.
   Minemura, T.
   Morikawa, H.
   Nakamura, T.
   Niikura, M.
   Notani, M.
   Ota, S.
   Saito, A.
   Sakurai, H.
   Shimoura, S.
   Sugawara, K.
   Sugimoto, T.
   Suzuki, H.
   Suzuki, T.
   Tanihata, I.
   Takeshita, E.
   Teranishi, T.
   Togano, Y.
   Yamada, K.
   Yamaguchi, K.
   Yanagisawa, Y.
TI Large proton contribution to the 2(+) excitation in Mg-20 studied by
   intermediate energy inelastic scattering
SO PHYSICAL REVIEW C
LA English
DT Article
ID RICH OXYGEN ISOTOPES; GIANT-RESONANCES; COULOMB-EXCITATION; NEUTRON;
   TRANSITION; NUCLEI; PB-208; DEFORMATION; RIKEN; MEV/U
AB Coulomb excitation of the proton-rich nucleus Mg-20 was studied using a radioactive Mg-20 beam at 58A MeV impinging on a lead target. The reduced transition probability B(E2; 0(g.s.)(+) -> 2(1)(+)) was extracted to be 177(32) e(2) fm(4), which agrees with the theoretical predictions by a cluster model assuming O-16 + 2p + 2p structure, a mean-field approach based on the angular momentum projected generator coordinate method, and the USD shell model. The ratio of the neutron-to-proton multipole matrix elements M-n/M-P in the mirror nucleus O-20 was deduced to be 2.51(25) with the M-n value evaluated from the measured B(E2) value for Mg-20 with the help of isospin symmetry. The results confirm the large M-n/M-p value previously reported in O-20, leading to the dominant role of the four valence nucleons in the 2(1)(+) excitation and persistence of the O-16 core in O-20 and Mg-20.
C1 [Iwasa, N.] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan.
   [Motobayashi, T.; Bishop, S.; Elekes, Z.; Kurokawa, M.; Minemura, T.; Sakurai, H.; Yamada, K.; Yanagisawa, Y.] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan.
   [Elekes, Z.] Hungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, Hungary.
   [Gibelin, J.; Ieki, K.; Kawai, S.; Kurita, K.; Morikawa, H.; Takeshita, E.; Togano, Y.; Yamaguchi, K.] Rikkyo Univ, Dept Phys, Tokyo 1718501, Japan.
   [Gibelin, J.] CNRS, IN2P3, Inst Phys Nucl, F-91406 Orsay, France.
   [Hosoi, M.; Sugawara, K.; Suzuki, T.] Saitama Univ, Dept Phys, Saitama 3388570, Japan.
   [Ishikawa, K.; Matsui, N.; Nakamura, T.; Sugimoto, T.] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan.
   [Iwasaki, H.; Suzuki, H.] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan.
   [Kubono, S.; Niikura, M.; Ota, S.; Saito, A.; Shimoura, S.] Univ Tokyo, Ctr Nucl Study, Wako, Saitama 3510198, Japan.
   [Notani, M.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   [Ota, S.] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan.
   [Tanihata, I.] Osaka Univ, Res Ctr Nucl Phys, Osaka 5670047, Japan.
   [Teranishi, T.] Kyushu Univ, Dept Phys, Fukuoka 8128581, Japan.
RP Iwasa, N (reprint author), Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan.
RI Teranishi, Takashi/D-2166-2012; Shimoura, Susumu/E-8692-2012; Elekes,
   Zoltan/J-4531-2012; SAKURAI, HIROYOSHI/G-5085-2014; Nakamura,
   Takashi/N-5390-2015
OI Shimoura, Susumu/0000-0003-4741-2865; Nakamura,
   Takashi/0000-0002-1838-9363
FU Young Scientists of the Japan Ministry of Education, Science, Sports,
   and Culture [(B)14740149]
FX We would like to thank the staff of the RIKEN Nishina Center for their
   help during the experiment. The present work was partly supported by the
   Grant-in-Aid for Young Scientists of the Japan Ministry of Education,
   Science, Sports, and Culture under the program no. (B)14740149.
NR 26
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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 AUG
PY 2008
VL 78
IS 2
AR 024306
DI 10.1103/PhysRevC.78.024306
PG 5
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700021
ER

PT J
AU Lin, T
   Elster, C
   Polyzou, WN
   Witala, H
   Glockle, W
AF Lin, T.
   Elster, Ch.
   Polyzou, W. N.
   Witala, H.
   Gloeckle, W.
TI Poincare invariant three-body scattering at intermediate energies
SO PHYSICAL REVIEW C
LA English
DT Article
ID ANGULAR-MOMENTUM DECOMPOSITION; BOUND-STATE; DEUTERON BREAKUP;
   PARTICLES; POTENTIALS; EQUATIONS
AB The Faddeev equation for three-nucleon scattering, based on an exactly Poincare invariant formulation of quantum mechanics, is solved for projectile energies LIP to 2 GeV. As in the nonrelativistic three-body problem, the three-body dynamics is determined, up to three-body interactions, by the two-body dynamics and cluster properties. The two-body interactions are determined, up to a unitary scattering equivalence, by two-body scattering data, which in our application are generated by a nonrelativistic Malfliet-Tjon interaction. The Faddeev equation is directly solved in a kinematic momentum representation without employing a partial-wave decomposition. The solution of the Faddeev equation is generated using Pade summation, and the numerical feasibility and stability of the solution is demonstrated. Scattering observables for elastic and breakup scattering are calculated for projectile energies in the intermediate energy range up to 2 GeV, and compared with their nonrelativistic counterparts. The convergence of the multiple scattering series is investigated as a function of the projectile energy in different scattering observables and configurations. The complementary roles of kinematic and dynamical contributions to our Poincare invariant model are investigated. Approximations to the two-body interaction embedded in the three-particle space are compared with the exact treatment.
C1 [Lin, T.; Elster, Ch.] Ohio Univ, Inst Nucl & Particle Phys, Athens, OH 45701 USA.
   [Lin, T.; Elster, Ch.] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA.
   [Elster, Ch.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   [Polyzou, W. N.] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA.
   [Witala, H.] Jagiellonian Univ, Inst Phys, PL-30059 Krakow, Poland.
   [Gloeckle, W.] Ruhr Univ Bochum, Inst Theoret Phys 2, D-44780 Bochum, Germany.
RP Lin, T (reprint author), Ohio Univ, Inst Nucl & Particle Phys, Athens, OH 45701 USA.
RI Elster, Charlotte/N-9845-2015
FU Ohio Supercomputer Center (OSC) [PHS206]; U.S. Department of Energy,
   Office of Nuclear Physics [DE-FG02-93ER40756]; Ohio University
   [DE-FG02-86ER40286]; University of Iowa [DE-AC02-06CH11357]; Argonne
   National Laboratory; Helmholtz Association [VH-VI-231]
FX We thank the Ohio Supercomputer Center (OSC) for the use of their
   facilities under Grant No. PHS206. Part of the numerical calculations
   were performed on the IBM Regatta p690+ of the NIC in Julich, Germany.
   This work was performed in part under the auspices of the U.S.
   Department of Energy, Office of Nuclear Physics, under Contract No.
   DE-FG02-93ER40756 with Ohio University, Contract No. DE-FG02-86ER40286
   with the University of Iowa, and Contract No. DE-AC02-06CH11357 with
   Argonne National Laboratory. It was also partially supported by the
   Helmholtz Association through funds provided to the virtual institute
   "Spin and Strong QCD" (VH-VI-231).
NR 36
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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 AUG
PY 2008
VL 78
IS 2
AR 024002
DI 10.1103/PhysRevC.78.024002
PG 19
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700013
ER

PT J
AU Mocko, M
   Tsang, MB
   Lacroix, D
   Ono, A
   Danielewicz, P
   Lynch, WG
   Charity, RJ
AF Mocko, M.
   Tsang, M. B.
   Lacroix, D.
   Ono, A.
   Danielewicz, P.
   Lynch, W. G.
   Charity, R. J.
TI Transport model simulations of projectile fragmentation reactions at 140
   MeV/nucleon
SO PHYSICAL REVIEW C
LA English
DT Article
ID ANTISYMMETRIZED MOLECULAR-DYNAMICS; HEAVY-ION COLLISIONS; NUCLEAR
   FRAGMENTATION; MULTIFRAGMENTATION
AB The collisions in four different reaction systems using (40,48)Ca and (58,64)Ni isotope beams and a Be target have been simulated using the heavy ion phase space exploration and the anti symmetrized molecular dynamics models. The present study mainly focuses oil the model predictions for the excitation energies of the hot fragments and the cross sections of the final fragments produced in these reactions. The effects of various factors influencing the final fragment cross sections, such as the choice of the statistical decay code and its parameters. have been explored. The predicted fragment cross sections are compared to the projectile fragmentation cross sections measured with the A 1900 mass separator. At E/A = 140 MeV. reaction dynamics can significantly modify the detection efficiencies for the fragments and make them different from the efficiencies applied to the measured data reported in the previous work. The effects of efficiency corrections on the validation of event generator codes are discussed in the context of the two models.
C1 [Mocko, M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Mocko, M.; Tsang, M. B.; Lacroix, D.; Danielewicz, P.; Lynch, W. G.] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA.
   [Mocko, M.; Tsang, M. B.; Lacroix, D.; Danielewicz, P.; Lynch, W. G.] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA.
   [Lacroix, D.] CNRS, IN2P3, CEA, GANIL, F-14021 Caen, France.
   [Ono, A.] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan.
   [Charity, R. J.] Washington Univ, Dept Chem, St Louis, MO 63130 USA.
RP Mocko, M (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
RI Lynch, William/I-1447-2013; Mocko, Michal/B-1794-2010; Lujan Center,
   LANL/G-4896-2012
OI Lynch, William/0000-0003-4503-176X; Mocko, Michael/0000-0003-0447-4687; 
FU National Science Foundation [PHY-01-10253, PHY-0606007,
   DE-FG02-04ER41313]
FX A. Ono and D. Lacroix thank the National Superconducting Cyclotron
   Laboratory at Michigan State University for the support and hospitality
   during their sabbatical stays in 2005-2006 (A.O.) and 2006-2007 (D.L.).
   We would like to acknowledge the High Performance Computing Center [37]
   at Michigan State University for facilitating CPU-intensive calculations
   with the AMD code. This work is supported by the National Science
   Foundation under Grant Nos. PHY-01-10253, PHY-0606007, and
   DE-FG02-04ER41313.
NR 33
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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 AUG
PY 2008
VL 78
IS 2
AR 024612
DI 10.1103/PhysRevC.78.024612
PG 12
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700042
ER

PT J
AU Nelson, SL
   Folden, CM
   Gregorich, KE
   Dragojevic, I
   Dullmann, CE
   Eichler, R
   Garcia, MA
   Gates, JM
   Sudowe, R
   Nitsche, H
AF Nelson, S. L.
   Folden, C. M., III
   Gregorich, K. E.
   Dragojevic, I.
   Duellmann, Ch. E.
   Eichler, R.
   Garcia, M. A.
   Gates, J. M.
   Sudowe, R.
   Nitsche, H.
TI Comparison of complementary reactions for the production of (261,262)Bh
SO PHYSICAL REVIEW C
LA English
DT Article
ID DECAY PROPERTIES; ELEMENT 107; NUCLEAR; FUSION
AB Two heavy-ion induced fusion reactions producing (261,262)Bh were studied using the Berkeley Gas-filled Separator at the Lawrence Berkeley National Laboratory 88-Inch Cyclotron. An excitation function for the production of (262)Bh via the reaction (209)Bi ((54)Cr, n)(262)Bh was measured with a maximum cross section from a fit to the data of 430 +/- 110 pb observed at a compound nucleus excitation energy of 15.7 MeV. New data have been measured for the In exit channel of the (208)Pb((55)Mn, n)(262)Bh reaction. We present an updated excitation function with an observed maximum cross section of 530 100 pb at a compound nucleus excitation energy of 14.1 MeV. Events corresponding to the 2n exit channel for the (209)Bi ((54)Cr, 2n)(261)Bh and (208)Pb((261)Mn, 2n)(261)Bh reactions were also observed and are presented as partial excitation functions. The measured decay properties correspond well with existing experimental data. We compare these experimental results to cross section predictions from a model by Swiatecki et al. and discuss entrance channel effects on the magnitude of 1n cross sections.
C1 [Nelson, S. L.; Folden, C. M., III; Gregorich, K. E.; Dragojevic, I.; Duellmann, Ch. E.; Garcia, M. A.; Gates, J. M.; Sudowe, R.; Nitsche, H.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
   [Nelson, S. L.; Folden, C. M., III; Dragojevic, I.; Duellmann, Ch. E.; Garcia, M. A.; Gates, J. M.; Nitsche, H.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Duellmann, Ch. E.] Gesell Schwerionenforsch mbH, Bereich Kernchem, D-64291 Darmstadt, Germany.
   [Eichler, R.] Paul Scherrer Inst, Labor Radio & Umweltchem, CH-5232 Villigen, Switzerland.
   [Eichler, R.] Univ Bern, Dept Chem & Biochem, CH-3012 Bern, Switzerland.
RP Nelson, SL (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
RI Eichler, Robert/G-5130-2011; Folden, Charles/F-1033-2015
OI Folden, Charles/0000-0002-2814-3762
FU Office of High Energy and Nuclear Physics; U.S. Department of Energy
   [DE-AC02-05CH11231]; Swiss National Science Foundation [PA002-104962]
FX We would like to thank D. Leitner and the operations staff of the
   88-Inch Cyclotron for providing intense, stable beams of <SUP>54</SUP>Cr
   and <SUP>55</SUP>Mn for these experiments. The authors also wish to
   express their thanks to W. J. Swiatecki for his theoretical predictions
   and stimulating discussion, and the target laboratory at the GSI for the
   targets used in these studies. This work was supported in part by the
   Director, Office of High Energy and Nuclear Physics, Nuclear Physics
   Division of the U.S. Department of Energy, under contract
   DE-AC02-05CH11231. R.E. acknowledges the financial support of the Swiss
   National Science Foundation (PA002-104962).
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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 AUG
PY 2008
VL 78
IS 2
AR 024606
DI 10.1103/PhysRevC.78.024606
PG 8
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700036
ER

PT J
AU Pattabiraman, NS
   Jenkins, DG
   Bentley, MA
   Wadsworth, R
   Lister, CJ
   Carpenter, MP
   Janssens, RVF
   Khoo, TL
   Lauritsen, T
   Seweryniak, D
   Zhu, S
   Lotay, G
   Woods, PJ
   Krishichayan
   Van Isacker, P
AF Pattabiraman, N. S.
   Jenkins, D. G.
   Bentley, M. A.
   Wadsworth, R.
   Lister, C. J.
   Carpenter, M. P.
   Janssens, R. V. F.
   Khoo, T. L.
   Lauritsen, T.
   Seweryniak, D.
   Zhu, S.
   Lotay, G.
   Woods, P. J.
   Krishichayan
   Van Isacker, P.
TI Analog E1 transitions and isospin mixing
SO PHYSICAL REVIEW C
LA English
DT Article
ID NUCLEI; P-31
AB We investigate whether isospin mixing can be determined in a model-independent way from the relative strength of E1 transitions in mirror nuclei. The specific examples considered are the A = 31 and A = 35 mirror pairs, where a serious discrepancy between the strengths of 7/2(-) -> 5/2(+) transitions in the respective mirror nuclei has been observed. A theoretical analysis of the problem suggests that it ought to be possible to disentangle the isospin mixing in the initial and final states given sufficient information on experimental matrix elements. With this in mind, we obtain a lifetime for the relevant 7/2(-) state in S-31 using the Doppler-shift attenuation method. We then collate the available information on matrix elements to examine the level of isospin mixing for both A = 31 and A = 35 mirror pairs.
C1 [Pattabiraman, N. S.; Jenkins, D. G.; Bentley, M. A.; Wadsworth, R.] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.
   [Lister, C. J.; Carpenter, M. P.; Janssens, R. V. F.; Khoo, T. L.; Lauritsen, T.; Seweryniak, D.; Zhu, S.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   [Lotay, G.; Woods, P. J.] Univ Edinburgh, Sch Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland.
   [Krishichayan] UGC, DAE, CSR, Kolkata 700098, India.
   [Van Isacker, P.] CEA, DSM, CNRS,IN2P3, Grand Accelerateur Natl Ions Lourds, F-14076 Caen 5, France.
RP Pattabiraman, NS (reprint author), Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.
RI Chayan, Krishi/B-4889-2013; Carpenter, Michael/E-4287-2015
OI Carpenter, Michael/0000-0002-3237-5734
FU U.S. Department of Energy, Office of Nuclear Physics [DE-AC02-06CH
   11357]
FX This work was supported in part by the U.S. Department of Energy, Office
   of Nuclear Physics, under Contract DE-AC02-06CH 11357, and by the UK
   EPSRC.
NR 24
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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 AUG
PY 2008
VL 78
IS 2
AR 024301
DI 10.1103/PhysRevC.78.024301
PG 8
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700016
ER

PT J
AU Psaker, A
   Melnitchouk, W
   Christy, ME
   Keppel, C
AF Psaker, A.
   Melnitchouk, W.
   Christy, M. E.
   Keppel, C.
TI Quark-hadron duality and truncated moments of nucleon structure
   functions
SO PHYSICAL REVIEW C
LA English
DT Article
ID Q(2) EVOLUTION-EQUATIONS; INELASTIC EP SCATTERING; PARTON DISTRIBUTIONS;
   PERTURBATION-THEORY; FREEDOM
AB We employ a novel new approach to study local quark-hadron duality using "truncated" moments, or integrals of structure functions over restricted regions of x, to determine the degree to which individual resonance regions are dominated by leading twist. Because truncated moments obey the same Q(2) evolution equations as the leading twist parton distributions, this approach makes possible for the first time a description of resonance region data and the phenomenon of quark-hadron duality directly from QCD.
C1 [Psaker, A.; Melnitchouk, W.; Keppel, C.] Jefferson Lab, Newport News, VA 23606 USA.
   [Psaker, A.; Christy, M. E.; Keppel, C.] Hampton Univ, Hampton, VA 23668 USA.
   [Psaker, A.] Amer Univ Nigeria, Yola, Nigeria.
RP Psaker, A (reprint author), Jefferson Lab, Newport News, VA 23606 USA.
FU U.S. Department of Energy [DE-AC05-06OR23177]; National Science
   Foundation [0400332]
FX We thank I. Clout for helpful communications, and S. Kumano for
   providing the Q<SUP>2</SUP> evolution code from Ref. [9]. This work was
   supported by the U.S. Department of Energy contract DE-AC05-06OR23177,
   under which Jefferson Science Associates, LLC operates the Thomas
   Jefferson National Accelerator Facility, and National Science Foundation
   grant 0400332.
NR 32
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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 AUG
PY 2008
VL 78
IS 2
AR 025206
DI 10.1103/PhysRevC.78.025206
PG 9
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700059
ER

PT J
AU Santoro, JP
   Smith, ES
   Garcon, M
   Guidal, M
   Laget, JM
   Weiss, C
   Adams, G
   Amaryan, MJ
   Anghinolfi, M
   Asryan, G
   Audit, G
   Avakian, H
   Bagdasaryan, H
   Baillie, N
   Ball, J
   Ball, JP
   Baltzell, NA
   Barrow, S
   Battaglieri, M
   Bedlinskiy, I
   Bektasoglu, M
   Bellis, M
   Benmouna, N
   Berman, BL
   Biselli, AS
   Blaszczyk, L
   Bonner, BE
   Bookwalter, C
   Bouchigny, S
   Boiarinov, S
   Bradford, R
   Branford, D
   Briscoe, WJ
   Brooks, WK
   Bueltmann, S
   Burkert, VD
   Butuceanu, C
   Calarco, JR
   Careccia, SL
   Carman, DS
   Casey, L
   Cazes, A
   Chen, S
   Cheng, L
   Cole, PL
   Collins, P
   Coltharp, P
   Cords, D
   Corvisiero, P
   Crabb, D
   Crannell, H
   Crede, V
   Cummings, JP
   Dale, D
   Dashyan, N
   De Masi, R
   De Sanctis, E
   De Vita, R
   Degtyarenko, PV
   Denizli, H
   Dennis, L
   Deur, A
   Dhamija, S
   Dharmawardane, KV
   Dhuga, KS
   Dickson, R
   Djalali, C
   Dodge, GE
   Doughty, D
   Dugger, M
   Dytman, S
   Dzyubak, OP
   Egiyan, H
   Egiyan, KS
   El Fassi, L
   Elouadrhiri, L
   Eugenio, P
   Fatemi, R
   Fedotov, G
   Feuerbach, RJ
   Ficenec, J
   Forest, TA
   Fradi, A
   Funsten, H
   Gavalian, G
   Gevorgyan, N
   Gilfoyle, GP
   Giovanetti, KL
   Girod, FX
   Goetz, JT
   Gohn, W
   Gordon, CIO
   Gothe, RW
   Graham, L
   Griffioen, KA
   Guillo, M
   Guler, N
   Guo, L
   Gyurjyan, V
   Hadjidakis, C
   Hafidi, K
   Hakobyan, H
   Hanretty, C
   Hardie, J
   Hassall, N
   Heddle, D
   Hersman, FW
   Hicks, K
   Hleiqawi, I
   Holtrop, M
   Hyde-Wright, CE
   Ilieva, Y
   Ireland, DG
   Ishkhanov, BS
   Isupov, EL
   Ito, MM
   Jenkins, D
   Jo, HS
   Johnstone, JR
   Joo, K
   Juengst, HG
   Kalantarians, N
   Keller, D
   Kellie, JD
   Khandaker, M
   Kim, W
   Klein, A
   Klein, FJ
   Klimenko, V
   Kossov, M
   Krahn, Z
   Kramer, LH
   Kubarovsky, V
   Kuhn, J
   Kuhn, SE
   Kuleshov, SV
   Kuznetsov, V
   Lachniet, J
   Langheinrich, J
   Lawrence, D
   Li, J
   Livingston, K
   Lu, HY
   MacCormick, M
   Marchand, C
   Markov, N
   Mattione, P
   McAleer, S
   McKinnon, B
   McNabb, JWC
   Mecking, BA
   Mehrabyan, S
   Melone, JJ
   Mestayer, MD
   Meyer, CA
   Mibe, T
   Mikhailov, K
   Minehart, R
   Mirazita, M
   Miskimen, R
   Mokeev, V
   Morand, L
   Moreno, B
   Moriya, K
   Morrow, SA
   Moteabbed, M
   Mueller, J
   Munevar, E
   Mutchler, GS
   Nadel-Turonski, P
   Nasseripour, R
   Niccolai, S
   Niculescu, G
   Niculescu, I
   Niczyporuk, BB
   Niroula, MR
   Niyazov, RA
   Nozar, M
   O'Rielly, GV
   Osipenko, M
   Ostrovidov, AI
   Park, K
   Park, S
   Pasyuk, E
   Paterson, C
   Pereira, SA
   Philips, SA
   Pierce, J
   Pivnyuk, N
   Pocanic, D
   Pogorelko, O
   Popa, I
   Pozdniakov, S
   Preedom, BM
   Price, JW
   Procureur, S
   Prok, Y
   Protopopescu, D
   Qin, LM
   Raue, BA
   Riccardi, G
   Ricco, G
   Ripani, M
   Ritchie, BG
   Rosner, G
   Rossi, P
   Sabatie, F
   Saini, MS
   Salamanca, J
   Salgado, C
   Sapunenko, V
   Schott, D
   Schumacher, RA
   Serov, VS
   Sharabian, YG
   Sharov, D
   Shvedunov, NV
   Skabelin, AV
   Smith, LC
   Sober, DI
   Sokhan, D
   Stavinsky, A
   Stepanyan, SS
   Stepanyan, S
   Stokes, BE
   Stoler, P
   Strakovsky, II
   Strauch, S
   TaiUti, M
   Tedeschi, DJ
   Tkabladze, A
   Tkachenko, S
   Todor, L
   Tur, C
   Ungaro, M
   Vineyard, MF
   Vlassov, AV
   Watts, DP
   Weinstein, LB
   Weygand, DP
   Williams, M
   Wolin, E
   Wood, MH
   Yegneswaran, A
   Yurov, M
   Zana, L
   Zhang, J
   Zhao, B
   Zhao, ZW
AF Santoro, J. P.
   Smith, E. S.
   Garcon, M.
   Guidal, M.
   Laget, J. M.
   Weiss, C.
   Adams, G.
   Amaryan, M. J.
   Anghinolfi, M.
   Asryan, G.
   Audit, G.
   Avakian, H.
   Bagdasaryan, H.
   Baillie, N.
   Ball, J.
   Ball, J. P.
   Baltzell, N. A.
   Barrow, S.
   Battaglieri, M.
   Bedlinskiy, I.
   Bektasoglu, M.
   Bellis, M.
   Benmouna, N.
   Berman, B. L.
   Biselli, A. S.
   Blaszczyk, L.
   Bonner, B. E.
   Bookwalter, C.
   Bouchigny, S.
   Boiarinov, S.
   Bradford, R.
   Branford, D.
   Briscoe, W. J.
   Brooks, W. K.
   Bueltmann, S.
   Burkert, V. D.
   Butuceanu, C.
   Calarco, J. R.
   Careccia, S. L.
   Carman, D. S.
   Casey, L.
   Cazes, A.
   Chen, S.
   Cheng, L.
   Cole, P. L.
   Collins, P.
   Coltharp, P.
   Cords, D.
   Corvisiero, P.
   Crabb, D.
   Crannell, H.
   Crede, V.
   Cummings, J. P.
   Dale, D.
   Dashyan, N.
   De Masi, R.
   De Sanctis, E.
   De Vita, R.
   Degtyarenko, P. V.
   Denizli, H.
   Dennis, L.
   Deur, A.
   Dhamija, S.
   Dharmawardane, K. V.
   Dhuga, K. S.
   Dickson, R.
   Djalali, C.
   Dodge, G. E.
   Doughty, D.
   Dugger, M.
   Dytman, S.
   Dzyubak, O. P.
   Egiyan, H.
   Egiyan, K. S.
   El Fassi, L.
   Elouadrhiri, L.
   Eugenio, P.
   Fatemi, R.
   Fedotov, G.
   Feuerbach, R. J.
   Ficenec, J.
   Forest, T. A.
   Fradi, A.
   Funsten, H.
   Gavalian, G.
   Gevorgyan, N.
   Gilfoyle, G. P.
   Giovanetti, K. L.
   Girod, F. X.
   Goetz, J. T.
   Gohn, W.
   Gordon, C. I. O.
   Gothe, R. W.
   Graham, L.
   Griffioen, K. A.
   Guillo, M.
   Guler, N.
   Guo, L.
   Gyurjyan, V.
   Hadjidakis, C.
   Hafidi, K.
   Hakobyan, H.
   Hanretty, C.
   Hardie, J.
   Hassall, N.
   Heddle, D.
   Hersman, F. W.
   Hicks, K.
   Hleiqawi, I.
   Holtrop, M.
   Hyde-Wright, C. E.
   Ilieva, Y.
   Ireland, D. G.
   Ishkhanov, B. S.
   Isupov, E. L.
   Ito, M. M.
   Jenkins, D.
   Jo, H. S.
   Johnstone, J. R.
   Joo, K.
   Juengst, H. G.
   Kalantarians, N.
   Keller, D.
   Kellie, J. D.
   Khandaker, M.
   Kim, W.
   Klein, A.
   Klein, F. J.
   Klimenko, A. V.
   Kossov, M.
   Krahn, Z.
   Kramer, L. H.
   Kubarovsky, V.
   Kuhn, J.
   Kuhn, S. E.
   Kuleshov, S. V.
   Kuznetsov, V.
   Lachniet, J.
   Langheinrich, J.
   Lawrence, D.
   Li, Ji
   Livingston, K.
   Lu, H. Y.
   MacCormick, M.
   Marchand, C.
   Markov, N.
   Mattione, P.
   McAleer, S.
   McKinnon, B.
   McNabb, J. W. C.
   Mecking, B. A.
   Mehrabyan, S.
   Melone, J. J.
   Mestayer, M. D.
   Meyer, C. A.
   Mibe, T.
   Mikhailov, K.
   Minehart, R.
   Mirazita, M.
   Miskimen, R.
   Mokeev, V.
   Morand, L.
   Moreno, B.
   Moriya, K.
   Morrow, S. A.
   Moteabbed, M.
   Mueller, J.
   Munevar, E.
   Mutchler, G. S.
   Nadel-Turonski, P.
   Nasseripour, R.
   Niccolai, S.
   Niculescu, G.
   Niculescu, I.
   Niczyporuk, B. B.
   Niroula, M. R.
   Niyazov, R. A.
   Nozar, M.
   O'Rielly, G. V.
   Osipenko, M.
   Ostrovidov, A. I.
   Park, K.
   Park, S.
   Pasyuk, E.
   Paterson, C.
   Pereira, S. Anefalos
   Philips, S. A.
   Pierce, J.
   Pivnyuk, N.
   Pocanic, D.
   Pogorelko, O.
   Popa, I.
   Pozdniakov, S.
   Preedom, B. M.
   Price, J. W.
   Procureur, S.
   Prok, Y.
   Protopopescu, D.
   Qin, L. M.
   Raue, B. A.
   Riccardi, G.
   Ricco, G.
   Ripani, M.
   Ritchie, B. G.
   Rosner, G.
   Rossi, P.
   Sabatie, F.
   Saini, M. S.
   Salamanca, J.
   Salgado, C.
   Sapunenko, V.
   Schott, D.
   Schumacher, R. A.
   Serov, V. S.
   Sharabian, Y. G.
   Sharov, D.
   Shvedunov, N. V.
   Skabelin, A. V.
   Smith, L. C.
   Sober, D. I.
   Sokhan, D.
   Stavinsky, A.
   Stepanyan, S. S.
   Stepanyan, S.
   Stokes, B. E.
   Stoler, P.
   Strakovsky, I. I.
   Strauch, S.
   TaiUti, M.
   Tedeschi, D. J.
   Tkabladze, A.
   Tkachenko, S.
   Todor, L.
   Tur, C.
   Ungaro, M.
   Vineyard, M. F.
   Vlassov, A. V.
   Watts, D. P.
   Weinstein, L. B.
   Weygand, D. P.
   Williams, M.
   Wolin, E.
   Wood, M. H.
   Yegneswaran, A.
   Yurov, M.
   Zana, L.
   Zhang, J.
   Zhao, B.
   Zhao, Z. W.
TI Electroproduction of phi(1020) mesons at 1.4 <= Q(2) <= 3.8 GeV(2)
   measured with the CLAS spectrometer
SO PHYSICAL REVIEW C
LA English
DT Article
ID LARGE MOMENTUM-TRANSFER; VECTOR-MESONS; EXCLUSIVE ELECTROPRODUCTION;
   PHI-MESONS; HERA; PHOTOPRODUCTION; QCD; LEPTOPRODUCTION; SCATTERING;
   HYDROGEN
AB Electroproduction of exclusive phi vector mesons has been studied with the CLAS detector in the kinematic range 1.4 <= Q(2) <= 3.8 GeV(2), 0.0 <= t' <= 3.6 GeV(2), and 2.0 <= W <= 3.0 GeV. The scaling exponent for the total cross section as 1/(Q(2) + M(phi)(2))(n) was determined to be n = 2.49 +/- 0.33. The slope of the four-momentum transfer t' distribution is b(phi) = 0.98 +/- 0.17 GeV(-2). Under the assumption of s-channel helicity conservation, we determine the ratio of longitudinal to transverse cross sections to be R = 0.86 +/- 0.24. A two-gluon exchange model is able to reproduce the main features of the data.
C1 [Santoro, J. P.; Ficenec, J.; Jenkins, D.] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA.
   [Santoro, J. P.; Casey, L.; Cheng, L.; Crannell, H.; Klein, F. J.; Sober, D. I.] Catholic Univ Amer, Washington, DC 20064 USA.
   [Smith, E. S.; Laget, J. M.; Weiss, C.; Avakian, H.; Boiarinov, S.; Burkert, V. D.; Carman, D. S.; Cole, P. L.; Cords, D.; Degtyarenko, P. V.; Deur, A.; Doughty, D.; Egiyan, H.; Elouadrhiri, L.; Guo, L.; Gyurjyan, V.; Hardie, J.; Heddle, D.; Ito, M. M.; Joo, K.; Kramer, L. H.; Kubarovsky, V.; Mokeev, V.; Nozar, M.; Raue, B. A.; Sapunenko, V.; Sharabian, Y. G.; Stepanyan, S.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
   [Garcon, M.; Audit, G.; Ball, J.; De Masi, R.; Marchand, C.; Morand, L.; Morrow, S. A.; Procureur, S.; Sabatie, F.] CEA Saclay, Serv Phys Nucl, F-91191 Gif Sur Yvette, France.
   [Guidal, M.; Bouchigny, S.; Fradi, A.; Hadjidakis, C.; Jo, H. S.; MacCormick, M.; Moreno, B.; Morrow, S. A.; Niccolai, S.] Inst Phys Nucl ORSAY, Orsay, France.
   [El Fassi, L.; Hafidi, K.] Argonne Natl Lab, Argonne, IL 60439 USA.
   [Ball, J. P.; Collins, P.; Dugger, M.; Pasyuk, E.; Ritchie, B. G.] Arizona State Univ, Tempe, AZ 85287 USA.
   Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
   [Price, J. W.] Calif State Univ Dominguez Hills, Carson, CA 90747 USA.
   [Bellis, M.; Bradford, R.; Dickson, R.; Feuerbach, R. J.; Krahn, Z.; Kuhn, J.; Lachniet, J.; Meyer, C. A.; Moriya, K.; Schumacher, R. A.] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
   [Doughty, D.; Hardie, J.] Christopher Newport Univ, Newport News, VA 23606 USA.
   [Joo, K.; Markov, N.] Univ Connecticut, Storrs, CT 06269 USA.
   [Branford, D.; Sokhan, D.] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
   [Biselli, A. S.] Fairfield Univ, Fairfield, CT 06824 USA.
   [Dhamija, S.; Kramer, L. H.; Moteabbed, M.; Nasseripour, R.; Raue, B. A.; Schott, D.] Florida Int Univ, Miami, FL 33199 USA.
   [Barrow, S.; Blaszczyk, L.; Bookwalter, C.; Chen, S.; Coltharp, P.; Crede, V.; Dennis, L.; Eugenio, P.; Hanretty, C.; Ostrovidov, A. I.; Park, S.; Riccardi, G.; Saini, M. S.; Stokes, B. E.] Florida State Univ, Tallahassee, FL 32306 USA.
   [Benmouna, N.; Berman, B. L.; Briscoe, W. J.; Dhuga, K. S.; Ilieva, Y.; Munevar, E.; Nadel-Turonski, P.; Niccolai, S.; O'Rielly, G. V.; Philips, S. A.; Popa, I.; Strakovsky, I. I.; Strauch, S.] George Washington Univ, Washington, DC 20052 USA.
   [Hassall, N.; Ireland, D. G.; Johnstone, J. R.; Kellie, J. D.; Livingston, K.; Paterson, C.; Protopopescu, D.; Rosner, G.] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland.
   [Cole, P. L.; Dale, D.; Forest, T. A.; Salamanca, J.] Idaho State Univ, Pocatello, ID 83209 USA.
   [De Sanctis, E.; Mirazita, M.; Pereira, S. Anefalos; Rossi, P.] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
   [Anghinolfi, M.; Battaglieri, M.; Corvisiero, P.; De Vita, R.; Osipenko, M.; Ricco, G.; Ripani, M.; TaiUti, M.] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy.
   Univ Bonn, Inst Strahlen & Kernphys, D-5300 Bonn, Germany.
   [Bedlinskiy, I.; Boiarinov, S.; Kossov, M.; Kuleshov, S. V.; Mikhailov, K.; Pivnyuk, N.; Pogorelko, O.; Pozdniakov, S.; Serov, V. S.; Stavinsky, A.] Inst Theoret & Expt Phys, RU-117259 Moscow, Russia.
   [Niculescu, G.] James Madison Univ, Harrisonburg, VA 22807 USA.
   [Kim, W.; Kuznetsov, V.; Park, K.; Stepanyan, S. S.] Kyungpook Natl Univ, Taegu 702701, South Korea.
   [Skabelin, A. V.] MIT, Cambridge, MA 02139 USA.
   [Lawrence, D.; Miskimen, R.] Univ Massachusetts, Amherst, MA 01003 USA.
   [Calarco, J. R.; Gavalian, G.; Hersman, F. W.; Holtrop, M.; Protopopescu, D.] Univ New Hampshire, Durham, NH 03824 USA.
   [Khandaker, M.; Salgado, C.] Norfolk State Univ, Norfolk, VA 23504 USA.
   [Hicks, K.; Hleiqawi, I.; Keller, D.; Mibe, T.; Niculescu, G.; Niroula, M. R.; Niyazov, R. A.] Ohio Univ, Athens, OH 45701 USA.
   [Amaryan, M. J.; Bagdasaryan, H.; Bektasoglu, M.; Bueltmann, S.; Careccia, S. L.; Dharmawardane, K. V.; Dodge, G. E.; Gavalian, G.; Guler, N.; Hyde-Wright, C. E.; Juengst, H. G.; Kalantarians, N.; Klein, A.; Klimenko, A. V.; Kuhn, S. E.; Lachniet, J.; Qin, L. M.] Old Dominion Univ, Norfolk, VA 23529 USA.
   [Denizli, H.; Dytman, S.; Mueller, J.] Univ Pittsburgh, Pittsburgh, PA 15260 USA.
   [Adams, G.; Biselli, A. S.; Cummings, J. P.; Kuhn, J.; Li, Ji; Niyazov, R. A.] Rensselaer Polytech Inst, Troy, NY 12180 USA.
   [Bonner, B. E.; Mestayer, M. D.; Mutchler, G. S.; Stoler, P.] Rice Univ, Houston, TX 77005 USA.
   Univ Richmond, Richmond, VA 23173 USA.
   [Brooks, W. K.] Univ Tecn Federico Santa Maria, Valparaiso, Chile.
   [Baltzell, N. A.; Cazes, A.; Djalali, C.; Dzyubak, O. P.; Graham, L.; Guillo, M.; Langheinrich, J.; Lu, H. Y.; Nasseripour, R.; Park, K.; Preedom, B. M.; Strauch, S.; Zhao, Z. W.] Univ S Carolina, Columbia, SC 29208 USA.
   Union Coll, Schenectady, NY 12308 USA.
   [Crabb, D.; Fatemi, R.; Minehart, R.; Pierce, J.; Pocanic, D.; Prok, Y.; Smith, L. C.] Univ Virginia, Charlottesville, VA 22901 USA.
   [Butuceanu, C.; Egiyan, H.; Funsten, H.; Griffioen, K. A.] Coll William & Mary, Williamsburg, VA 23187 USA.
   [Asryan, G.; Bagdasaryan, H.; Dashyan, N.; Hakobyan, H.] Yerevan Phys Inst, Yerevan 375036, Armenia.
   [Fedotov, G.; Ishkhanov, B. S.; Isupov, E. L.; Mokeev, V.; Sharov, D.; Shvedunov, N. V.] Moscow MV Lomonosov State Univ, Gen Nucl Phys Inst, RU-119899 Moscow, Russia.
RP Santoro, JP (reprint author), Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA.
RI Meyer, Curtis/L-3488-2014; Sabatie, Franck/K-9066-2015; Osipenko,
   Mikhail/N-8292-2015; Zhang, Jixie/A-1461-2016; Protopopescu,
   Dan/D-5645-2012; riccardi, gabriele/A-9269-2012; Zana,
   Lorenzo/H-3032-2012; Isupov, Evgeny/J-2976-2012; Ishkhanov,
   Boris/E-1431-2012; Zhao, Bo/J-6819-2012; Brooks, William/C-8636-2013;
   Kuleshov, Sergey/D-9940-2013; Schumacher, Reinhard/K-6455-2013; Ireland,
   David/E-8618-2010; Bektasoglu, Mehmet/A-2074-2012; Lu,
   Haiyun/B-4083-2012
OI Meyer, Curtis/0000-0001-7599-3973; Sabatie, Franck/0000-0001-7031-3975;
   Osipenko, Mikhail/0000-0001-9618-3013; Hyde,
   Charles/0000-0001-7282-8120; Bellis, Matthew/0000-0002-6353-6043; Zhao,
   Bo/0000-0003-3171-5335; Brooks, William/0000-0001-6161-3570; Kuleshov,
   Sergey/0000-0002-3065-326X; Schumacher, Reinhard/0000-0002-3860-1827;
   Ireland, David/0000-0001-7713-7011; 
FU U.S. Department of Energy; National Science Foundation; Italian Istituto
   Nazionale di Fisica Nucleare; French Centre National de la Recherche
   Scientifique; French Commissariat a I'Energie Atomique; Korean Science
   and Engineering Foundation; Southeastern Universities Research
   Association (SURA) [DE-AC05-84ER40150]
FX We acknowledge the outstanding efforts of the staff of the Accelerator
   and the Physics Divisions at JLab that made this experiment possible.
   This work was supported in part by the U.S. Department of Energy, the
   National Science Foundation, the Italian Istituto Nazionale di Fisica
   Nucleare, the French Centre National de la Recherche Scientifique, the
   French Commissariat a I'Energie Atomique, and the Korean Science and
   Engineering Foundation. The Southeastern Universities Research
   Association (SURA) operated the Thomas Jefferson National Accelerator
   Facility for the United States Department of Energy under contract
   DE-AC05-84ER40150.
NR 42
TC 26
Z9 26
U1 0
U2 6
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 AUG
PY 2008
VL 78
IS 2
AR 025210
DI 10.1103/PhysRevC.78.025210
PG 14
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700063
ER

PT J
AU Visser, DW
   Wrede, C
   Caggiano, JA
   Clark, JA
   Deibel, CM
   Lewis, R
   Parikh, A
   Parker, PD
AF Visser, D. W.
   Wrede, C.
   Caggiano, J. A.
   Clark, J. A.
   Deibel, C. M.
   Lewis, R.
   Parikh, A.
   Parker, P. D.
TI Measurement of (23)Mg(p, gamma)(24)Al resonance energies (vol 76,
   065803, 2007)
SO PHYSICAL REVIEW C
LA English
DT Correction
ID DRAGON FACILITY; ISAC
AB Using recent data we reduce the systematic uncertainty in our measurement [Phys. Rev. C 76, 065803 (2007)] of the excitation energy of the second level above the proton threshold in (24)Al and find it to be 2523(3) keV, a factor of two improvement over our previously reported value of 2524(6) keV.
C1 [Visser, D. W.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
   [Wrede, C.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
   [Wrede, C.; Caggiano, J. A.; Clark, J. A.; Deibel, C. M.; Lewis, R.; Parikh, A.; Parker, P. D.] Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA.
RP Visser, DW (reprint author), Microsoft Corp, Redmond, WA 98052 USA.
EM wrede@u.washington.edu
RI Visser, Dale/A-8117-2009
OI Visser, Dale/0000-0002-2891-4731
FU U.S. Department of Energy [DE-FG02-91ER40609, DE-FG02-97ER41020]
FX This work was supported by the U.S. Department of Energy under grants
   DE-FG02-91ER40609 and DE-FG02-97ER41020.
NR 14
TC 4
Z9 4
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD AUG
PY 2008
VL 78
IS 2
AR 028802
DI 10.1103/PhysRevC.78.028802
PG 2
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700084
ER

PT J
AU Wiringa, RB
   Schiavilla, R
   Pieper, SC
   Carlson, J
AF Wiringa, R. B.
   Schiavilla, R.
   Pieper, Steven C.
   Carlson, J.
TI Dependence of two-nucleon momentum densities on total pair momentum
SO PHYSICAL REVIEW C
LA English
DT Article
ID MONTE-CARLO CALCULATIONS; NUCLEI
AB Two-nucleon momentum distributions are calculated for the ground states of 3 He and 4 He as a function of the nucleons' relative and total momenta. We use variational Monte Carlo wave functions derived from a realistic Hamiltonian with two- and three-nucleon potentials. The momentum distribution of pp pairs is found to be much smaller than that of pn pairs for values of the relative momentum in the range 300-500 MeV/c and vanishing total momentum. However, as the total momentum increases to 400 MeV/c, the ratio of pp to pn pairs in this relative momentum range grows and approaches the limit 1/2 for (3)He and 1/4 for (4)He, corresponding to the ratio of pp to pn pairs in these nuclei. This behavior should be easily observable in two-nucleon knock-out processes, such as A (e, e(1) pN).
C1 [Wiringa, R. B.; Pieper, Steven C.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   [Schiavilla, R.] Ctr Theory, Jefferson Lab, Newport News, VA 23606 USA.
   [Schiavilla, R.] Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
   [Carlson, J.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Wiringa, RB (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RI Wiringa, Robert/M-4970-2015
FU U.S. Department of Energy, Office of Nuclear Physics [DE-AC02-06CH
   11357, DE-AC05-06OR23177, DE-AC52-06NA25396]; SciDAC
   [DE-FC02-07ER41457]; Argonne's Laboratory Computing Resource Center
FX A stimulating conversation with L. Weinstein is gratefully acknowledged
   by one of the authors (R.S.). This work is supported by the U.S.
   Department of Energy, Office of Nuclear Physics, under Contracts
   DE-AC02-06CH 11357 (R.B.W. and S.C.P.), DE-AC05-06OR23177 (R.S.),
   DE-AC52-06NA25396 (J.C.), and SciDAC grant DE-FC02-07ER41457. The
   calculations were made at Argonne's Laboratory Computing Resource
   Center.
NR 16
TC 21
Z9 21
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD AUG
PY 2008
VL 78
IS 2
AR 021001
DI 10.1103/PhysRevC.78.021001
PG 3
WC Physics, Nuclear
SC Physics
GA 350QR
UT WOS:000259368700001
ER

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AU Aaltonen, T
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   Mehta, A
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   Waters, D.
   Weinberger, M.
   Weter, W. C., III
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   Whiteson, D.
   Wicklund, A. B.
   Wicklund, E.
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   Williams, H. H.
   Wilson, P.
   Winer, B. L.
   Wittich, P.
   Wolbers, S.
   Wolfe, C.
   Wright, T.
   Wu, X.
   Wynne, S. M.
   Yagil, A.
   Yamamoto, K.
   Yamaoka, J.
   Yamashita, T.
   Yang, U. K.
   Yang, Y. C.
   Yao, W. M.
   Yeh, G. P.
   Yoh, J.
   Yorita, K.
   Yoshida, T.
   Yu, G. B.
   Yu, I.
   Yu, S. S.
   Yun, J. C.
   Zanello, L.
   Zanetti, A.
   Zaw, I.
   Zhang, X.
   Zheng, Y.
   Zucchelli, S.
CA CDF Collaboration
TI Search for standard model Higgs boson production in association with a W
   boson at CDF
SO PHYSICAL REVIEW D
LA English
DT Article
ID ELECTROMAGNETIC CALORIMETER; UPGRADE; DETECTOR; TEV
AB We present a search for standard model Higgs boson production in association with a W boson in proton-antiproton collisions (p (p) over bar ->(WH)-H-+/-->center dot nu b (b) over bar) at a center of mass energy of 1.96 TeV. The search employs data collected with the CDF II detector which correspond to an integrated luminosity of approximately 1 fb(-1). We select events consistent with a signature of a single lepton (e(+/-)/mu(+/-)), missing transverse energy, and two jets. Jets corresponding to bottom quarks are identified with a secondary vertex tagging method and a neural network filter technique. The observed number of events and the dijet mass distributions are consistent with the standard model background expectations, and we set 95% confidence level upper limits on the production cross section times branching ratio ranging from 3.9 to 1.3 pb for Higgs boson masses from 110 to 150 GeV/c(2), respectively.
C1 [Aaltonen, T.; Maki, T.; Mehtala, P.; Orava, R.; Osterberg, K.; Saarikko, H.; Remortel, N. Van] Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland.
   [Aaltonen, T.; Maki, T.; Mehtala, P.; Orava, R.; Osterberg, K.; Saarikko, H.; Remortel, N. Van] Helsinki Inst Phys, FIN-00014 Helsinki, Finland.
   [Chen, Y. C.; Hou, S.; Lu, R. -S.; Mitra, A.; Teng, P. K.; Wang, S. M.] Acad Sinica, Inst Phys, Taipei 11529, Taiwan.
   [LeCompte, T.; Wagner, P.; Wagner, R. G.; Wicklund, A. B.] Argonne Natl Lab, Argonne, IL 60439 USA.
   [Giakoumopoulou, V.; Giokaris, N.; Manousakis-Katsikakis, A.; Vellidis, C.] Univ Athens, GR-15771 Athens, Greece.
   [Attal, A.; Cavalli-Sforza, M.; De Lorenzo, G.; Deluca, C.; D'Onofrio, M.; Martinez, M.] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain.
   [Dittmann, J. R.; Krumnack, N.] Baylor Univ, Waco, TX 76798 USA.
   [Castro, A.; Deninno, M.; Mazzanti, P.; Moggi, N.; Zucchelli, S.] Ist Nazl Fis Nucl, I-40127 Bologna, Italy.
   [Clark, D.; Kirsch, L.; Miladinovic, N.] Brandeis Univ, Waltham, MA 02254 USA.
   [Chertok, M.; Conway, J.; Cox, D. J.; Almenar, C. Cuenca; Erbacher, R.; Forrest, R.; Ivanov, A.; Johnson, W.; Lander, R. L.; Lister, A.] Univ Calif Davis, Davis, CA 95616 USA.
   [Dong, P.; Hauser, J.; Zheng, Y.] Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
   [Hsu, S. -C.; Lipeles, E.; Norman, M.; Rthwein, F. Wu; Yagil, A.] Univ Calif San Diego, La Jolla, CA 92093 USA.
   [Boveia, A.; Brau, B.; Garberson, F.; Hill, C. S.; Incandela, J.; Koay, S. A.; Krutelyov, V.; Rossin, R.; Scott, A. L.; Stuart, D.] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
   [Gonzalez, B. Alvarez; Casal, B.; Cuevas, J.; Gomez, G.; Rodrigo, T.; Ruiz, A.; Scodellaro, L.; Vila, I.; Vilar, R.] Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain.
   [Chung, K.; Galyardt, J.; Jun, S. Y.; Paulini, M.; Pueschel, E.; Russ, J.; Tiwari, V.] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
   [Adelman, J.; Brubaker, E.; Fedorko, W. T.; Grosso-Pilcher, C.; Kim, Y. K.; Kwang, S.; Levy, S.; Paramonov, A. A.; Schmidt, M. A.; Shochet, M.; Wolfe, C.; Yang, U. K.; Yorita, K.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
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   [Clark, A.; Sfyrla, A.; Shreyber, I.; Vallecorsa, S.; Wu, X.] Univ Geneva, CH-1211 Geneva, Switzerland.
   [Bussey, P.; Davies, T.; Martin, V.; Robson, A.; Denis, R. St.; Thompson, A. S.] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland.
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   [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.] Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea.
   [Chang, S. H.; Cho, K.; Jeon, E. J.; Joo, K. K.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Kim, 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.] 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.] Korea Inst Sci & Technol Informat, Taejon 305806, 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.] Chonnam Natl Univ, Kwangju 500757, South Korea.
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   [Houlden, M.; Manca, G.; McNulty, R.; Mehta, A.; Shears, T.; Wynne, S. M.] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England.
   [Bartsch, V.; Beecher, D.; Bizjak, I.; Cerrito, L.; Lancaster, M.; Malik, S.; Nurse, E.; Vine, T.; Waters, D.] UCL, London WC1E 6BT, England.
   [Calancha, C.; Fernandez, J. P.; Gonzalez, O.; Martinez-Ballarin, R.; Redondo, I.; Vidal, M.] Ctr Invest Energet Medioambient & Tecnol, E-28040 Madrid, Spain.
   [Bauer, G.; Choudalakis, G.; Gomez-Ceballos, G.; Hahn, K.; Henderson, C.; Knuteson, B.; Makhoul, K.; Paus, C.] MIT, Cambridge, MA 02139 USA.
   [Beauchemin, P. -H.; Buzatu, A.; Carron, S.; MacQueen, D.; Pashapour, S.; Roy, P.; Sinervo, P.; Snihur, R.; Spreitzer, T.; Warburton, A.; Williams, G.] McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada.
   [Beauchemin, P. -H.; Buzatu, A.; Carron, S.; MacQueen, D.; Pashapour, S.; Roy, P.; Sinervo, P.; Snihur, R.; Spreitzer, T.; Warburton, A.; Williams, G.] Univ Toronto, Toronto, ON M5S 1A7, Canada.
   [Amidei, D.; Campbell, M.; Copic, K.; Cully, J. C.; Gerdes, D.; Tecchio, M.; Varganov, A.; Wright, T.] Univ Michigan, Ann Arbor, MI 48109 USA.
   [Bromberg, C.; Campanelli, M.; Gunay-Unalan, Z.; Huston, J.; Miller, R.; Sorin, V.; Tollefson, K.] Michigan State Univ, E Lansing, MI 48824 USA.
   [Gold, M.; Gorelov, I.; Rekovic, V.; Seidel, S.; Strologas, J.; Vogel, M.] Univ New Mexico, Albuquerque, NM 87131 USA.
   [Anastassov, A.; Schmitt, M.; Stentz, D.] Northwestern Univ, Evanston, IL 60208 USA.
   [Efron, J.; Haber, C.; 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.
   [Azfar, F.; Farrington, S.; Harper, S.; Hays, C.; Huffman, B. T.; Linacre, J.; Lyons, L.; Malde, S.; Oakes, L.; Pounder, N.; Rademacker, J.; Renton, P.; Stelzer-Chilton, O.] Univ Oxford, Oxford OX1 3RH, England.
   [Amerio, S.; Bisello, D.; Brigliadori, L.; Busetto, G.; Compostella, G.; Cortiana, G.; Donini, J.; Gresele, A.; Lazzizzera, I.; Loreti, M.; Lucchesi, D.; Griso, S. Pagan] Ist Nazl Fis Nucl, Sez Padova Trento, I-35131 Padua, Italy.
   [Ciobanu, C. I.; Di Giovanni, G. P.; Savoy-Navarro, A.; Tourneur, S.] Univ Paris 06, IN2P3, LPNHE, CNRS,UMR7585, F-75252 Paris, France.
   [Canepa, A.; Heijboer, A.; Heinrich, J.; Keung, J.; Kroll, J.; Lockyer, N. S.; Neu, C.; Pianori, E.; Rodriguez, T.; Thomson, E.; Tu, Y.; Whiteson, D.; Williams, H. H.] Univ Penn, Philadelphia, PA 19104 USA.
   [Azzurri, P.; Bedeschi, F.; Bellettini, G.; Carosi, R.; Catastini, P.; Cavaliere, V.; Chiarelli, G.; Ciocci, M. A.; Crescioli, F.; Dell'Orso, M.; Donati, S.; Ferrazza, C.; Garcia, J. E.; Giannetti, P.; Giunta, M.; Introzzi, G.; Lami, S.; Latino, G.; Leone, S.; Menzione, A.; Morello, J.; Pagliarone, C.; Piacentino, G.; Punzi, G.; Ristori, L.; Sartori, L.; Scribano, A.; Scuri, F.; Sidoti, A.; Squillacioti, P.; Turini, N.; Vataga, E.; Volpi, G.] Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
   [Boudreau, J.; Gibson, K.; Hartz, M.; Liu, C.; Rahaman, A.; Shepard, P. F.] Univ Pittsburgh, Pittsburgh, PA 15260 USA.
   [Apresyan, A.; Barnes, V. E.; Bolla, G.; Bortoletto, D.; Flanagan, G.; Garfinkel, A. F.; Jones, M.; Laasanen, A. T.; 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.; Gimmell, J. L.; Han, B. -Y.; McFarland, K. S.; Sakumoto, W. K.; Yu, G. B.] Univ Rochester, Rochester, NY 14627 USA.
   [Bhatti, A.; Demortier, L.; Goulianos, K.; Hatakeyama, K.; Lungu, G.; Mesropian, C.; Terashi, K.] Rockefeller Univ, New York, NY 10021 USA.
   [De Cecco, S.; Dionisi, C.; Gallinaro, M.; Giagu, S.; Iori, M.; Luci, C.; Mastrandrea, P.; Rescigno, M.; Sarkar, S.; Zanello, L.] Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy.
   [Chuang, S. H.; Dorigo, T.; Dube, S.; Halkiadakis, E.; Hare, D.; Lath, A.; Somalwar, S.; Yamaoka, J.] Rutgers State Univ, Piscataway, NJ 08855 USA.
   [Aurisano, A.; Elagin, A.; Goncharov, M.; Kamon, T.; Khotilovich, V.; Lee, E.; Lee, S. W.; McIntyre, P.; Safonov, A.; Toback, D.; Weinberger, M.] Texas A&M Univ, College Stn, TX 77843 USA.
   [Cauz, D.; Ruzza, B. Di; Giordani, M.; Pauletta, G.; Penzo, A.; Rossi, M.; Santi, L.; Totaro, P.; Zanetti, A.] Ist Nazl Fis Nucl, Trieste, Italy.
   [Akimoto, T.; Hara, K.; Kim, S. H.; Kimura, N.; Kubo, T.; Kurata, M.; Maruyama, T.; Masubuchi, T.; Miyake, H.; Nagai, Y.; Nagano, A.; Nakamura, K.; Shimojima, M.; Suzuki, T.; Takeuchi, Y.; Tomura, T.; Ukegawa, F.] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan.
   [Hare, M.; Napier, A.; Rolli, S.; Sliwa, K.; Whitehouse, B.] Tufts Univ, Medford, MA 02155 USA.
   [Arisawa, T.; Kondo, K.; 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.; Han, J. Y.; Handler, R.; Herndon, M.; Pondrom, L.; Pursley, J.; Ramakrishnan, V.; Shon, Y.] Univ Wisconsin, Madison, WI 53706 USA.
   [Feild, R. G.; Husemann, U.; Loginov, A.; Martin, A.; Schmidt, M. P.; Stanitzki, M.; Tipton, P.] Yale Univ, New Haven, CT 06520 USA.
   [Amerio, S.; Bisello, D.; Busetto, G.; Cortiana, G.; Gresele, A.; Lazzizzera, I.; Loreti, M.; Lucchesi, D.; Griso, S. Pagan] Univ Padua, I-35131 Padua, Italy.
   [Azzurri, P.; Ferrazza, C.; Vataga, E.] Scuola Normale Super Pisa, I-56127 Pisa, Italy.
   [Bellettini, G.; Crescioli, F.; Dell'Orso, M.; Donati, S.; Giunta, M.; Morello, J.; Punzi, G.; Volpi, G.] Univ Pisa, I-56127 Pisa, Italy.
   [Castro, A.; Deninno, M.; Mazzanti, P.; Moggi, N.; Zucchelli, S.] Univ Bologna, I-40127 Bologna, Italy.
   [Catastini, P.; Cavaliere, V.; Ciocci, M. A.; Latino, G.; Scribano, A.; Squillacioti, P.; Turini, N.] Univ Siena, I-56127 Pisa, Italy.
   [Cauz, D.; Ruzza, B. Di; Giordani, M.; Pauletta, G.; Santi, L.; Totaro, P.] Univ Trieste, Udine, Italy.
   [Dionisi, C.; Giagu, S.; Iori, M.; Luci, C.; Mastrandrea, P.; Sarkar, S.; Zanello, L.] Sapienza Univ Roma, I-00185 Rome, Italy.
RP Aaltonen, T (reprint author), Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland.
RI 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; Muelmenstaedt, Johannes/K-2432-2015; Introzzi,
   Gianluca/K-2497-2015; Gorelov, Igor/J-9010-2015; Ruiz,
   Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco,
   Sandro/B-1016-2012; manca, giulia/I-9264-2012; Amerio,
   Silvia/J-4605-2012; Punzi, Giovanni/J-4947-2012; Annovi,
   Alberto/G-6028-2012; Ivanov, Andrew/A-7982-2013; Warburton,
   Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Lysak,
   Roman/H-2995-2014; Moon, Chang-Seong/J-3619-2014; Scodellaro,
   Luca/K-9091-2014; Grinstein, Sebastian/N-3988-2014; Prokoshin,
   Fedor/E-2795-2012; Canelli, Florencia/O-9693-2016; Chiarelli,
   Giorgio/E-8953-2012; 
OI 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;
   Muelmenstaedt, Johannes/0000-0003-1105-6678; Introzzi,
   Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133; Ruiz,
   Alberto/0000-0002-3639-0368; Punzi, Giovanni/0000-0002-8346-9052;
   Annovi, Alberto/0000-0002-4649-4398; Ivanov, Andrew/0000-0002-9270-5643;
   Warburton, Andreas/0000-0002-2298-7315; Moon,
   Chang-Seong/0000-0001-8229-7829; Scodellaro, Luca/0000-0002-4974-8330;
   Robson, Aidan/0000-0002-1659-8284; Gallinaro,
   Michele/0000-0003-1261-2277; Torre, Stefano/0000-0002-7565-0118; Turini,
   Nicola/0000-0002-9395-5230; Osterberg, Kenneth/0000-0003-4807-0414;
   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;
   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;
   Prokoshin, Fedor/0000-0001-6389-5399; Canelli,
   Florencia/0000-0001-6361-2117; Lami, Stefano/0000-0001-9492-0147;
   Chiarelli, Giorgio/0000-0001-9851-4816; Giordani,
   Mario/0000-0002-0792-6039; Casarsa, Massimo/0000-0002-1353-8964; Vidal
   Marono, Miguel/0000-0002-2590-5987
NR 30
TC 10
Z9 10
U1 1
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 AUG
PY 2008
VL 78
IS 3
AR 032008
DI 10.1103/PhysRevD.78.032008
PG 16
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300012
ER

PT J
AU Aaltonen, T
   Adelman, J
   Akimoto, T
   Albrow, MG
   Gonzalez, BA
   Amerio, S
   Amidei, D
   Anastassov, A
   Annovi, A
   Antos, J
   Apollinari, G
   Apresyan, A
   Arisawa, T
   Artikov, A
   Ashmanskas, W
   Attal, A
   Aurisano, A
   Azfar, F
   Azzurri, P
   Badgett, W
   Barbaro-Galtieri, A
   Barnes, VE
   Barnett, BA
   Bartsch, V
   Bauer, G
   Beauchemin, PH
   Bedeschi, F
   Bednar, P
   Beecher, D
   Behari, S
   Bellettini, G
   Bellinger, J
   Benjamin, D
   Beretvas, A
   Beringer, J
   Bhatti, A
   Binkley, M
   Bisello, D
   Bizjak, I
   Blair, RE
   Blocker, C
   Blumenfeld, B
   Bocci, A
   Bodek, A
   Boisvert, V
   Bolla, G
   Bortoletto, D
   Boudreau, J
   Boveia, A
   Brau, B
   Bridgeman, A
   Brigliadori, L
   Bromberg, C
   Brubaker, E
   Budagov, J
   Budd, HS
   Budd, S
   Burkett, K
   Busetto, G
   Bussey, P
   Buzatu, A
   Byrum, KL
   Cabrera, S
   Calancha, C
   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
   Cavaliere, V
   Cavalli-Sforza, M
   Cerri, A
   Cerrito, L
   Chang, SH
   Chen, YC
   Chertok, M
   Chiarelli, G
   Chlachidze, G
   Chlebana, F
   Cho, K
   Chokheli, D
   Chou, JP
   Choudalakis, G
   Chuang, SH
   Chung, K
   Chung, WH
   Chung, YS
   Ciobanu, CI
   Ciocci, MA
   Clark, A
   Clark, D
   Compostella, G
   Convery, ME
   Conway, J
   Copic, K
   Cordelli, M
   Cortiana, G
   Cox, DJ
   Crescioli, F
   Almenar, CC
   Cuevas, J
   Culbertson, R
   Cully, JC
   Dagenhart, D
   Datta, M
   Davies, T
   de Barbaro, P
   De Cecco, S
   Deisher, A
   De Lorenzo, G
   Dell'Orso, M
   Deluca, C
   Demortier, L
   Deng, J
   Deninno, M
   Derwent, PF
   Di Giovanni, GP
   Dionisi, C
   Di Ruzza, B
   Dittmann, JR
   D'Onofrio, M
   Donati, S
   Dong, P
   Donini, J
   Dorigo, T
   Dube, S
   Efron, J
   Elagin, A
   Erbacher, R
   Errede, D
   Errede, S
   Eusebi, R
   Fang, HC
   Farrington, S
   Fedorko, WT
   Feild, RG
   Feindt, M
   Fernandez, JP
   Ferrazza, C
   Field, R
   Flanagan, G
   Forrest, R
   Franklin, M
   Freeman, JC
   Frisch, H
   Furic, I
   Gallinaro, M
   Galyardt, J
   Garberson, F
   Garcia, JE
   Garfinkel, AF
   Geffert, P
   Genser, K
   Gerberich, H
   Gerdes, D
   Gessler, A
   Giagu, S
   Giakoumopoulou, V
   Giannetti, P
   Gibson, K
   Gimmell, JL
   Ginsburg, CM
   Giokaris, N
   Giordani, M
   Giromini, P
   Giunta, M
   Giurgiu, G
   Glagolev, V
   Glenzinski, D
   Gold, M
   Goldschmidt, N
   Golossanov, A
   Gomez, G
   Gomez-Ceballos, G
   Goncharov, M
   Gonzalez, O
   Gorelov, I
   Goshaw, AT
   Goulianos, K
   Gresele, A
   Grinstein, S
   Grosso-Pilcher, C
   Group, RC
   Grundler, U
   da Costa, JG
   Gunay-Unalan, Z
   Haber, C
   Hahn, K
   Hahn, SR
   Halkiadakis, E
   Han, BY
   Han, JY
   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
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   Williams, H. H.
   Wilson, P.
   Winer, B. L.
   Wittich, P.
   Wolbers, S.
   Wolfe, C.
   Wright, T.
   Wu, X.
   Wynne, S. M.
   Yagil, A.
   Yamamoto, K.
   Yamaoka, J.
   Yang, U. K.
   Yang, Y. C.
   Yao, W. M.
   Yeh, G. P.
   Yoh, J.
   Yorita, K.
   Yoshida, T.
   Yu, G. B.
   Yu, I.
   Yu, S. S.
   Yun, J. C.
   Zanello, L.
   Zanetti, A.
   Zaw, I.
   Zhang, X.
   Zheng, Y.
   Zucchelli, S.
CA CDF Collaboration
TI Search for heavy, long-lived neutralinos that decay to photons at CDF II
   using photon timing
SO PHYSICAL REVIEW D
LA English
DT Article
ID P(P)OVER-BAR COLLISIONS; E(+)E(-) COLLISIONS; HADRON COLLIDERS;
   ROOT-S=1.96 TEV; SUPERSYMMETRY; ENERGY; FERMILAB; BREAKING; PHYSICS;
   EVENTS
AB We present the results of the first hadron collider search for heavy, long-lived neutralinos that decay via chi(0)(1)->gamma G in gauge-mediated supersymmetry breaking models. Using an integrated luminosity of 570 +/- 34 pb(-1) of p (p) over bar collisions at root s=1.96 TeV, we select gamma+jet+missing transverse energy candidate events based on the arrival time of a high-energy photon at the electromagnetic calorimeter as measured with a timing system that was recently installed on the CDF II detector. We find 2 events, consistent with the background estimate of 1.3 +/- 0.7 events. While our search strategy does not rely on model-specific dynamics, we set cross section limits and place the world-best 95% C.L. lower limit on the chi(0)(1) mass of 101 GeV/c(2) at tau(0)(chi 1)=5 ns.
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RP Aaltonen, T (reprint author), Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland.
RI Grinstein, Sebastian/N-3988-2014; Canelli, Florencia/O-9693-2016;
   Chiarelli, Giorgio/E-8953-2012; Paulini, Manfred/N-7794-2014; Russ,
   James/P-3092-2014; unalan, zeynep/C-6660-2015; Lazzizzera,
   Ignazio/E-9678-2015; Cabrera Urban, Susana/H-1376-2015; Garcia, Jose
   /H-6339-2015; ciocci, maria agnese /I-2153-2015; Cavalli-Sforza,
   Matteo/H-7102-2015; Introzzi, Gianluca/K-2497-2015; Gorelov,
   Igor/J-9010-2015; Prokoshin, Fedor/E-2795-2012; Leonardo,
   Nuno/M-6940-2016; Moon, Chang-Seong/J-3619-2014; Scodellaro,
   Luca/K-9091-2014; Ruiz, Alberto/E-4473-2011; Robson, Aidan/G-1087-2011;
   De Cecco, Sandro/B-1016-2012; manca, giulia/I-9264-2012; Amerio,
   Silvia/J-4605-2012; Punzi, Giovanni/J-4947-2012; Annovi,
   Alberto/G-6028-2012; Ivanov, Andrew/A-7982-2013; Warburton,
   Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Lysak, Roman/H-2995-2014
OI Gallinaro, Michele/0000-0003-1261-2277; Torre,
   Stefano/0000-0002-7565-0118; Turini, Nicola/0000-0002-9395-5230;
   Osterberg, Kenneth/0000-0003-4807-0414; 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; 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; Canelli,
   Florencia/0000-0001-6361-2117; Lami, Stefano/0000-0001-9492-0147;
   Chiarelli, Giorgio/0000-0001-9851-4816; 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;
   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; Gorelov,
   Igor/0000-0001-5570-0133; Prokoshin, Fedor/0000-0001-6389-5399;
   Leonardo, Nuno/0000-0002-9746-4594; Moon,
   Chang-Seong/0000-0001-8229-7829; Scodellaro, Luca/0000-0002-4974-8330;
   Ruiz, Alberto/0000-0002-3639-0368; Punzi, Giovanni/0000-0002-8346-9052;
   Annovi, Alberto/0000-0002-4649-4398; Ivanov, Andrew/0000-0002-9270-5643;
   Warburton, Andreas/0000-0002-2298-7315; 
NR 44
TC 17
Z9 17
U1 1
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 AUG
PY 2008
VL 78
IS 3
AR 032015
DI 10.1103/PhysRevD.78.032015
PG 29
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300019
ER

PT J
AU Abouzaid, E
   Arenton, M
   Barker, AR
   Bellantoni, L
   Blucher, E
   Bock, GJ
   Cheu, E
   Coleman, R
   Corcoran, MD
   Corti, G
   Cox, B
   Erwin, AR
   Escobar, CO
   Glazov, A
   Golossanov, A
   Gomes, RA
   Gouffon, P
   Hsiung, YB
   Jensen, DA
   Kessler, R
   Kotera, K
   Ledovskoy, A
   McBride, PL
   Monnier, E
   Nguyen, H
   Niclasen, R
   Phillips, DG
   Ping, H
   Ramberg, EJ
   Ray, RE
   Ronquest, M
   Santos, E
   Shields, J
   Slater, W
   Smith, D
   Solomey, N
   Swallow, EC
   Toale, PA
   Tschirhart, R
   Velissaris, C
   Wah, YW
   Wang, J
   White, HB
   Whitmore, J
   Wilking, M
   Winston, R
   Worcester, ET
   Worcester, M
   Yamanaka, T
   Zimmerman, ED
   Zukanovich, RF
AF Abouzaid, E.
   Arenton, M.
   Barker, A. R.
   Bellantoni, L.
   Blucher, E.
   Bock, G. J.
   Cheu, E.
   Coleman, R.
   Corcoran, M. D.
   Corti, G.
   Cox, B.
   Erwin, A. R.
   Escobar, C. O.
   Glazov, A.
   Golossanov, A.
   Gomes, R. A.
   Gouffon, P.
   Hsiung, Y. B.
   Jensen, D. A.
   Kessler, R.
   Kotera, K.
   Ledovskoy, A.
   McBride, P. L.
   Monnier, E.
   Nguyen, H.
   Niclasen, R.
   Phillips, D. G., II
   Ping, H.
   Ramberg, E. J.
   Ray, R. E.
   Ronquest, M.
   Santos, E.
   Shields, J.
   Slater, W.
   Smith, D.
   Solomey, N.
   Swallow, E. C.
   Toale, P. A.
   Tschirhart, R.
   Velissaris, C.
   Wah, Y. W.
   Wang, J.
   White, H. B.
   Whitmore, J.
   Wilking, M.
   Winston, R.
   Worcester, E. T.
   Worcester, M.
   Yamanaka, T.
   Zimmerman, E. D.
   Zukanovich, R. F.
CA Ktev Collaboration
TI Search for the rare decay K(L)->pi(0)pi(0)gamma
SO PHYSICAL REVIEW D
LA English
DT Article
ID CP VIOLATION
AB The KTeV E799 experiment has conducted a search for the rare decay K(L)->pi(0)pi(0)gamma via the topology K(L)->pi(0)pi(0)(D)gamma (where pi(0)(D)->gamma e(+)e(-)). Because of Bose statistics of the pi(0) pair and the real nature of the photon, the K(L)->pi(0)pi(0)gamma decay is restricted to proceed at lowest order by the CP conserving direct emission (DE) of an E2 electric quadrupole photon. The rate of this decay is interesting theoretically since chiral perturbation theory predicts that this process vanishes at level O(p(4)). Therefore, this mode probes chiral perturbation theory at O(p(6)). In this paper we report a determination of an upper limit of 2.43x10(-7) (90% CL) for K(L)->pi(0)pi(0)gamma. This is approximately a factor of 20 lower than previous results.
C1 [Arenton, M.; Corti, G.; Cox, B.; Golossanov, A.; Ledovskoy, A.; Phillips, D. G., II; Ronquest, M.; Shields, J.; Smith, D.] Univ Virginia, Charlottesville, VA 22901 USA.
   [Cheu, E.; Wang, J.; Ktev Collaboration] Univ Arizona, Tucson, AZ 85721 USA.
   [Slater, W.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
   [Escobar, C. O.; Gomes, R. A.] Univ Estadual Campinas, BR-13083970 Campinas, SP, Brazil.
   [Abouzaid, E.; Blucher, E.; Glazov, A.; Kessler, R.; Monnier, E.; Solomey, N.; Swallow, E. C.; Wah, Y. W.; Winston, R.; Worcester, E. T.; Worcester, M.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
   [Barker, A. R.; Niclasen, R.; Toale, P. A.; Wilking, M.; Zimmerman, E. D.] Univ Colorado, Boulder, CO 80309 USA.
   [Swallow, E. C.] Elmhurst Coll, Elmhurst, IL 60126 USA.
   [Bellantoni, L.; Bock, G. J.; Coleman, R.; Golossanov, A.; Hsiung, Y. B.; Jensen, D. A.; McBride, P. L.; Nguyen, H.; Ramberg, E. J.; Ray, R. E.; Tschirhart, R.; White, H. B.; Whitmore, J.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   [Kotera, K.; Yamanaka, T.] Osaka Univ, Osaka 5600043, Japan.
   [Corcoran, M. D.] Rice Univ, Houston, TX 77005 USA.
   [Gouffon, P.] Univ Sao Paulo, BR-05315970 Sao Paulo, Brazil.
   [Ping, H.; Velissaris, C.] Univ Wisconsin, Madison, WI 53706 USA.
   [Monnier, E.] CNRS, CPP Marseille, F-75700 Paris, France.
RP Smith, D (reprint author), Univ Virginia, Charlottesville, VA 22901 USA.
EM poldybloom@yahoo.com
RI Gomes, Ricardo/B-6899-2008; Zukanovich Funchal, Renata/C-5829-2013;
   Moura Santos, Edivaldo/K-5313-2016; Gouffon, Philippe/I-4549-2012; Inst.
   of Physics, Gleb Wataghin/A-9780-2017
OI Gomes, Ricardo/0000-0003-0278-4876; Zukanovich Funchal,
   Renata/0000-0001-6749-0022; Moura Santos, Edivaldo/0000-0002-2818-8813;
   Gouffon, Philippe/0000-0001-7511-4115; 
NR 13
TC 2
Z9 2
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 AUG
PY 2008
VL 78
IS 3
AR 032014
DI 10.1103/PhysRevD.78.032014
PG 6
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300018
ER

PT J
AU Abouzaid, E
   Arenton, M
   Barker, AR
   Bellantoni, L
   Blucher, E
   Bock, GJ
   Cheu, E
   Coleman, R
   Corcoran, MD
   Cox, B
   Erwin, AR
   Escobar, CO
   Glazov, A
   Golossanov, A
   Gomes, RA
   Gouffon, P
   Hsiung, YB
   Jensen, DA
   Kessler, R
   Kotera, K
   Ledovskoy, A
   McBride, PL
   Monnier, E
   Nguyen, H
   Niclasen, R
   Phillips, DG
   Ramberg, EJ
   Ray, RE
   Ronquest, M
   Santos, E
   Slater, W
   Smith, D
   Solomey, N
   Swallow, EC
   Toale, PA
   Tschirhart, R
   Wah, YW
   Wang, J
   White, HB
   Whitmore, J
   Wilking, MJ
   Winstein, B
   Winston, R
   Worcester, ET
   Yamanaka, T
   Zimmerman, ED
   Zukanovich, RF
AF Abouzaid, E.
   Arenton, M.
   Barker, A. R.
   Bellantoni, L.
   Blucher, E.
   Bock, G. J.
   Cheu, E.
   Coleman, R.
   Corcoran, M. D.
   Cox, B.
   Erwin, A. R.
   Escobar, C. O.
   Glazov, A.
   Golossanov, A.
   Gomes, R. A.
   Gouffon, P.
   Hsiung, Y. B.
   Jensen, D. A.
   Kessler, R.
   Kotera, K.
   Ledovskoy, A.
   McBride, P. L.
   Monnier, E.
   Nguyen, H.
   Niclasen, R.
   Phillips, D. G., II
   Ramberg, E. J.
   Ray, R. E.
   Ronquest, M.
   Santos, E.
   Slater, W.
   Smith, D.
   Solomey, N.
   Swallow, E. C.
   Toale, P. A.
   Tschirhart, R.
   Wah, Y. W.
   Wang, J.
   White, H. B.
   Whitmore, J.
   Wilking, M. J.
   Winstein, B.
   Winston, R.
   Worcester, E. T.
   Yamanaka, T.
   Zimmerman, E. D.
   Zukanovich, R. F.
CA KTeV Collaboration
TI Detailed study of the K-L ->pi(0)pi(0)pi(0) Dalitz plot
SO PHYSICAL REVIEW D
LA English
DT Article
ID QUADRATIC SLOPE PARAMETER; PI-PI SCATTERING; DECAY; LENGTHS
AB Using a sample of 68.3x10(6) K-L ->pi(0)pi(0)pi(0) decays collected in 1996-1999 by the KTeV (E832) experiment at Fermilab, we present a detailed study of the K-L ->pi(0)pi(0)pi(0) Dalitz plot density. We report the first observation of interference from K-L ->pi(+)pi(-)pi(0) decays in which pi(+)pi(-) rescatters to pi(0)pi(0) in a final-state interaction. This rescattering effect is described by the Cabibbo-Isidori model, and it depends on the difference in pion scattering lengths between the isospin I=0 and I=2 states, a(0)-a(2). Using the Cabibbo-Isidori model, and fixing (a(0)-a(2))m(pi)(+)=0.268 +/- 0.017 as measured by the CERN-NA48 collaboration, we present the first measurement of the K-L ->pi(0)pi(0)pi(0) quadratic slope parameter that accounts for the rescattering effect: h(000)=(+0.59 +/- 0.20(stat)+/- 0.48(syst)+/- 1.06(ext))x10(-3), where the uncertainties are from data statistics, KTeV systematic errors, and external systematic errors. Fitting for both h(000) and a(0)-a(2), we find h(000)=(-2.09 +/- 0.62(stat)+/- 0.72(syst)+/- 0.28(ext))x10(-3), and m(pi)(+)(a(0)-a(2))=0.215 +/- 0.014(stat)+/- 0.025(syst)+/- 0.006(ext); our value for a(0)-a(2) is consistent with that from NA48.
C1 [Abouzaid, E.; Blucher, E.; Glazov, A.; Kessler, R.; Monnier, E.; Solomey, N.; Swallow, E. C.; Wah, Y. W.; Winstein, B.; Winston, R.; Worcester, E. T.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
   [Cheu, E.; Wang, J.] Univ Arizona, Tucson, AZ 85721 USA.
   [Slater, W.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
   [Escobar, C. O.; Gomes, R. A.] Univ Estadual Campinas, BR-13083970 Campinas, SP, Brazil.
   [Barker, A. R.; Niclasen, R.; Toale, P. A.; Wilking, M. J.; Zimmerman, E. D.] Univ Colorado, Boulder, CO 80309 USA.
   [Swallow, E. C.] Elmhurst Coll, Elmhurst, IL 60126 USA.
   [Bellantoni, L.; Bock, G. J.; Coleman, R.; Hsiung, Y. B.; Jensen, D. A.; McBride, P. L.; Nguyen, H.; Ramberg, E. J.; Ray, R. E.; Tschirhart, R.; White, H. B.; Whitmore, J.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   [Kotera, K.; Yamanaka, T.] Osaka Univ, Osaka 5600043, Japan.
   [Corcoran, M. D.] Rice Univ, Houston, TX 77005 USA.
   [Gouffon, P.; Santos, E.; Zukanovich, R. F.] Univ Sao Paulo, BR-05315970 Sao Paulo, Brazil.
   [Arenton, M.; Cox, B.; Golossanov, A.; Ledovskoy, A.; Phillips, D. G., II; Ronquest, M.; Smith, D.] Univ Virginia, Dept Phys, Charlottesville, VA 22901 USA.
   [Arenton, M.; Cox, B.; Golossanov, A.; Ledovskoy, A.; Phillips, D. G., II; Ronquest, M.; Smith, D.] Univ Virginia, Inst Nucl & Particle Phys, Charlottesville, VA 22901 USA.
   [Erwin, A. R.] Univ Wisconsin, Madison, WI 53706 USA.
   [Monnier, E.] CNRS, CPP Marseille, F-75700 Paris, France.
RP Abouzaid, E (reprint author), Univ Chicago, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA.
RI Gouffon, Philippe/I-4549-2012; Inst. of Physics, Gleb
   Wataghin/A-9780-2017; Gomes, Ricardo/B-6899-2008; Zukanovich Funchal,
   Renata/C-5829-2013; Moura Santos, Edivaldo/K-5313-2016
OI Gouffon, Philippe/0000-0001-7511-4115; HSIUNG, YEE/0000-0003-4801-1238;
   Gomes, Ricardo/0000-0003-0278-4876; Zukanovich Funchal,
   Renata/0000-0001-6749-0022; Moura Santos, Edivaldo/0000-0002-2818-8813
FU U. S. Department of Energy; The National Science Foundation; The
   Ministry of Education and Science of Japan; Fundacao de Amparo a
   Pesquisa do Estado de Sao Paulo-FAPESP; Conselho Nacional de
   Desenvolvimento Cientifico e Tecnologico-CNPq; CAPES-Ministerio Educao
FX We gratefully acknowledge the support and effort of the Fermilab staff
   and the technical staffs of the participating institutions for their
   vital contributions. This work was supported in part by the U. S.
   Department of Energy, The National Science Foundation, The Ministry of
   Education and Science of Japan, Fundacao de Amparo a Pesquisa do Estado
   de Sao Paulo-FAPESP, Conselho Nacional de Desenvolvimento Cientifico e
   Tecnologico-CNPq and CAPES-Ministerio Educao. We also wish to thank Gino
   Isidori for helpful discussions on implementing the CI3PI model for
   K<INF>L</INF> -> pi<SUP>0</SUP>pi<SUP>0</SUP>pi<SUP>0</SUP> decays.
NR 14
TC 16
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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 AUG
PY 2008
VL 78
IS 3
AR 032009
DI 10.1103/PhysRevD.78.032009
PG 13
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300013
ER

PT J
AU Armoni, A
   Lucini, B
   Patella, A
   Pica, C
AF Armoni, Adi
   Lucini, Biagio
   Patella, Agostino
   Pica, Claudio
TI Lattice study of planar equivalence: The quark condensate
SO PHYSICAL REVIEW D
LA English
DT Article
ID CHIRAL-SYMMETRY-BREAKING; WORLDLINE PATH-INTEGRALS; GAUGE-THEORIES; QCD;
   COUPLINGS; FERMIONS
AB We study quenched SU(N) gauge theories with fermions in the two-index symmetric, antisymmetric and the adjoint representations. Our main motivation is to check whether at large number of colors those theories become nonperturbatively equivalent. We prove the equivalence assuming that the charge-conjugation symmetry is not broken in pure Yang-Mills theory. We then carry out a quenched lattice simulation of the quark condensate in the symmetric, anti symmetric and the adjoint representations for SU(2), SU(3), SU(4), SU(6), and SU(8). We show that the data support the equivalence and discuss the size of subleading corrections.
C1 [Armoni, Adi; Lucini, Biagio; Patella, Agostino] Swansea Univ, Dept Phys, Swansea SA2 8PP, W Glam, Wales.
   [Pica, Claudio] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Armoni, A (reprint author), Swansea Univ, Dept Phys, Singleton Pk, Swansea SA2 8PP, W Glam, Wales.
RI Lucini, Biagio/E-7491-2010; 
OI Lucini, Biagio/0000-0001-8974-8266; Pica, Claudio/0000-0002-0569-0376;
   Armoni, Adi/0000-0002-8105-0645
FU Royal Society; STFC; U.S. Department of Energy [DE-AC02-98CH10886]
FX We thank L. Del Debbio and S. Hands for stimulating discussions, and M.
   Shifman and G. Veneziano for comments on the manuscript. Simulations
   have been performed on a computer cluster partially funded by the Royal
   Society and STFC. A. A. is supported by STFC. B. L. is supported by the
   Royal Society. A. P. is supported by an STFC special project grant and
   by the "Fondazione Angelo Della Riccia." The work of C. P. has been
   Supported by Contract No. DE-AC02-98CH10886 with the U.S. Department of
   Energy.
NR 33
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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
J9 PHYS REV D
JI Phys. Rev. D
PD AUG
PY 2008
VL 78
IS 4
AR 045019
DI 10.1103/PhysRevD.78.045019
PG 12
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 350QP
UT WOS:000259368500114
ER

PT J
AU Aubert, B
   Bona, M
   Karyotakis, Y
   Lees, JP
   Poireau, V
   Prudent, X
   Tisserand, V
   Zghiche, A
   Tico, JG
   Grauges, E
   Lopez, L
   Palano, A
   Pappagallo, M
   Eigen, G
   Stugu, B
   Sun, L
   Abrams, GS
   Battaglia, M
   Brown, DN
   Button-Shafer, J
   Cahn, RN
   Jacobsen, RG
   Kadyk, JA
   Kerth, LT
   Kolomensky, YG
   Kukartsev, G
   Lynch, G
   Osipenkov, IL
   Ronan, MT
   Tackmann, K
   Tanabe, T
   Wenzel, WA
   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
   Saleem, M
   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
   Paar, HP
   Rahatlou, S
   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
   Wilson, MG
   Winstrom, LO
   Chen, E
   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
   Hirschauer, JF
   Kreisel, A
   Nagel, M
   Nauenberg, U
   Olivas, A
   Smith, JG
   Ulmer, KA
   Wagner, SR
   Ayad, R
   Gabareen, AM
   Soffer, A
   Toki, WH
   Wilson, RJ
   Altenburg, DD
   Feltresi, E
   Hauke, A
   Jasper, H
   Karbach, M
   Merkel, J
   Petzold, A
   Spaan, B
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   Lacker, HM
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   Schubert, J
   Schubert, KR
   Schwierz, R
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   Bonneaud, GR
   Latour, E
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   Clark, PJ
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   Playfer, S
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   Watson, JE
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   Dauncey, PD
   Nash, JA
   Vazquez, WP
   Tibbetts, M
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   Cochran, J
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CA BaBar Collaboration
TI Measurement of the spin of the Xi(1530) resonance
SO PHYSICAL REVIEW D
LA English
DT Article
ID MASS; PARITY; WIDTH
AB The properties of the Xi(1530) resonance are investigated in the Lambda(+)(c)->Xi(-)pi(+)K(+) decay process. The data sample was collected with the BABAR detector at the SLAC PEP-II asymmetric-energy e(+)e(-) collider operating at center-of-mass energies 10.58 and 10.54 GeV. The corresponding integrated luminosity is approximately 230 fb(-1). The spin of the Xi(1530) is established to be 3/2. The existence of an S-wave amplitude in the Xi(-)pi(+) system is inferred, and its interference with the Xi(1530)(0) amplitude provides the first clear demonstration of the Breit-Wigner phase motion expected for the Xi(1530). The P(1)(cos theta(-)(Xi)) Legendre polynomial moment indicates the presence of a significant S-wave amplitude for Xi(-)pi(+) mass values above 1.6 GeV/c(2), and a dip in the mass distribution at approximately 1.7 GeV/c(2) is interpreted as due to the coherent addition of a Xi(1690)(0) contribution to this amplitude. This would imply J(P)=1/2(-) for the Xi(1690). Attempts at fitting the Xi(1530)(0) line shape yield unsatisfactory results, and this failure is attributed to interference effects associated with the amplitudes describing the K(+)pi(+) and/or Xi(-)K(+) systems.
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   [Baracchini, E.; Cavoto, G.; del Re, D.; Di Marco, E.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Jackson, P. D.; Mazzoni, M. A.; Morganti, S.; Piredda, G.; Polci, F.; Renga, F.; Voena, C.] Ist Nazl Fis Nucl, I-00185 Rome, Italy.
   [Ebert, M.; Hartmann, T.; Schroeder, H.; Waldi, R.] Univ Rostock, D-18057 Rostock, Germany.
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   [Emery, S.; Escalier, M.; 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.
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   [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.; Glanzman, T.; 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.; 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.
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RP Aubert, B (reprint author), CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
RI White, Ryan/E-2979-2015; 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; Lusiani,
   Alberto/A-3329-2016; Morandin, Mauro/A-3308-2016; Di Lodovico,
   Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Calcaterra,
   Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; 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; Patrignani, Claudia/C-5223-2009; Lista,
   Luca/C-5719-2008; 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
OI Strube, Jan/0000-0001-7470-9301; Chen, Chunhui /0000-0003-1589-9955;
   Raven, Gerhard/0000-0002-2897-5323; Ebert, Marcus/0000-0002-3014-1512;
   Hamel de Monchenault, Gautier/0000-0002-3872-3592; Lanceri,
   Livio/0000-0001-8220-3095; Corwin, Luke/0000-0001-7143-3821; Sciacca,
   Crisostomo/0000-0002-8412-4072; Adye, Tim/0000-0003-0627-5059; Lafferty,
   George/0000-0003-0658-4919; Salvatore, Fabrizio/0000-0002-3709-1554;
   Wilson, Robert/0000-0002-8184-4103; White, Ryan/0000-0003-3589-5900;
   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;
   Lusiani, Alberto/0000-0002-6876-3288; Morandin,
   Mauro/0000-0003-4708-4240; 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; 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; 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
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); European Union; A. P. Sloan Foundation
FX We are grateful for the extraordinary contributions of our PEP-II
   colleagues in achieving the excellent luminosity and machine conditions
   that have made this work possible. The success of this project also
   relies critically on the expertise and dedication of the computing
   organizations that support BABAR. The collaborating institutions wish to
   thank SLAC for its support and the kind hospitality extended to them.
   This work is supported by the U. S. Department of Energy and National
   Science Foundation, the Natural Sciences and Engineering Research
   Council (Canada), the Commissariat a l'Energie Atomique and Institut
   National de Physique Nucleaire et de Physique des Particules (France),
   the Bundesministerium fur Bildung und Forschung and Deutsche
   Forschungsgemeinschaft (Germany), the Istituto Nazionale di Fisica
   Nucleare (Italy), the Foundation for Fundamental Research on Matter (The
   Netherlands), the Research Council of Norway, the Ministry of Education
   and Science of the Russian Federation, Ministerio de Educacion y Ciencia
   (Spain), and the Science and Technology Facilities Council (United
   Kingdom). Individuals have received support from the Marie-Curie IEF
   program (European Union) and the A. P. Sloan Foundation.
NR 18
TC 13
Z9 13
U1 0
U2 3
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 AUG
PY 2008
VL 78
IS 3
AR 034008
DI 10.1103/PhysRevD.78.034008
PG 14
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300042
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
   Button-Shafer, J
   Cahn, RN
   Jacobsen, RG
   Kadyk, JA
   Kerth, LT
   Kolomensky, YG
   Kukartsev, G
   Lynch, G
   Osipenkov, IL
   Ronan, MT
   Suzuki, A
   Tackmann, K
   Tanabe, T
   Wenzel, WA
   Hawkes, CM
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   Schroeder, T
   Walker, D
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   Lusiani, A
   Marchiori, G
   Morganti, M
   Neri, N
   Paoloni, E
   Rizzo, G
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   Ferrarotto, F
   Ferroni, F
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   Mazzoni, MA
   Morganti, S
   Piredda, G
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   Schroeder, H
   Waldi, R
   Adye, T
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   Roethel, W
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   Emery, S
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   Eckmann, R.
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   Gershon, T. J.
   Harrison, P. F.
   Ilic, J.
   Latham, T. E.
   Mohanty, G. B.
   Band, H. R.
   Chen, X.
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   Flood, K. T.
   Pan, Y.
   Pierini, M.
   Prepost, R.
   Vuosalo, C. O.
   Wu, S. L.
CA BABAR Collaboration
TI Measurement of the branching fractions of the rare decays B-0 ->
   D-s((*)+)pi(-), B-0 -> D-s((*)+)rho(-), and B-0 -> Ds(*)-K(*)+
SO PHYSICAL REVIEW D
LA English
DT Article
ID CP-VIOLATION; B-MESONS
AB We report the measurement of the branching fractions of the rare decays B-0 -> D-s((*)+)pi(-), B-0 -> D-s((*)+)rho(-), and B-0 -> Ds(*)-K(*)+ in a sample of 381x10(6)Upsilon(4S) decays into B (B) over bar pairs collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) storage ring. We present evidence for the decay B-0 -> Ds-K*+ and the vector-vector decays B-0 -> D-s(*+)rho(-) and B-0 -> Ds*-K*+, as well as the first measurement of the vector meson polarization in these decays. We also determine the ratios of the CKM-suppressed to CKM-favored amplitudes r(D-(*)pi) and r(D-(*)rho) in decays B-0 -> D-(*)+/-pi(-/+) and B-0 -> D-(*)+/-rho(-/+), and comment on the prospects for measuring the CP observable sin(2 beta+gamma).
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.
   [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.
   [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, I-70126 Bari, Italy.
   [Lopez, L.; Palano, A.; Pappagallo, M.] Univ Bari, Dipartimento 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.; Button-Shafer, J.; Cahn, R. N.; Jacobsen, R. G.; Kadyk, J. A.; Kerth, L. T.; Kolomensky, Yu. G.; Kukartsev, G.; Lynch, G.; Osipenkov, I. L.; Ronan, M. T.; Suzuki, A.; Tackmann, K.; Tanabe, T.; Wenzel, W. A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [Hawkes, C. M.; Soni, N.; Watson, A. T.] Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
   [Schroeder, T.] Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany.
   [Walker, D.] Univ Bristol, Bristol BS8 1TL, Avon, England.
   [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.; Saleem, M.; 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, La Jolla, CA 92093 USA.
   [Campagnari, C.; Hong, T. M.; Kovalskyi, D.; Mazur, M. A.; Richman, J. D.] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
   [Beck, T. W.; Eisner, A. M.; 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, Inst Particle Phys, 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.; Andreassen, R.] CALTECH, Pasadena, CA 91125 USA.
   [Mancinelli, G.; Meadows, B. T.; Mishra, K.; Sokoloff, M. D.] Univ Cincinnati, Cincinnati, OH 45221 USA.
   [Blanc, F.; Bloom, P. C.; Ford, W. T.; Gaz, A.; Hirschauer, J. F.; Kreisel, A.; Nagel, M.; Nauenberg, U.; Olivas, A.; Smith, J. G.; Ulmer, K. A.; Wagner, S. R.] Univ Colorado, Boulder, CO 80309 USA.
   [Ayad, R.; Gabareen, A. M.; 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.
   Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
   [Bernard, D.; Bonneaud, G. R.; Latour, E.; Thiebaux, Ch.; Verderi, M.] Ecole Polytech, IN2P3, Lab Leprince Ringuet, CNRS, 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.] Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy.
   [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, I-44100 Ferrara, Italy.
   [Anulli, F.; Baldini-Ferroli, R.; Calcaterra, A.; Sangro, R. De; 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.; Vetere, M. Lo; Macri, M. M.; Monge, M. R.; Passaggio, S.; Patrignani, C.; Robutti, E.; Santroni, A.; Tosi, S.] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy.
   [Buzzo, A.; Contri, R.; Vetere, M. Lo; Macri, M. M.; Monge, M. R.; Passaggio, S.; Patrignani, C.; Robutti, E.; Santroni, A.; Tosi, S.] Ist Nazl Fis Nucl, I-16146 Genoa, Italy.
   [Chaisanguanthum, K. S.; Morii, M.] Harvard Univ, Cambridge, MA 02138 USA.
   [Dubitzky, R. S.; Marks, J.; Schenk, S.; Uwer, U.] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany.
   [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.
   [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.; Hocker, A.; Lepeltier, V.; Diberder, F. Le; Lutz, A. M.; Pruvot, S.; Roudeau, P.; Schune, M. H.; Serrano, J.; Sordini, V.; Stocchi, A.; Wang, W. F.; Wormser, G.] IN2P3, Lab Accelerateur Lineaire, CNRS, F-91898 Orsay, France.
   [Arnaud, N.; Bequilleux, J.; D'Orazio, A.; Davier, M.; Da Costa, J. Firmino; Grosdidier, G.; Hocker, A.; Lepeltier, V.; Diberder, F. Le; Lutz, A. M.; Pruvot, S.; Roudeau, P.; Schune, M. H.; Serrano, J.; Sordini, V.; Stocchi, A.; Wang, W. F.; Wormser, G.] Univ Paris 11, Ctr Sci Orsay, 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.; Salnikov, A. A.] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England.
   [Bevan, A. J.; George, K. A.; Lodovico, F. Di; Sacco, R.; Sigamani, M.] Univ London, London E1 4NS, England.
   [Cowan, G.; Flaecher, H. U.; Hopkins, D. A.; Paramesvaran, S.; Salvatore, F.; Wren, A. C.] Univ London, Egham TW20 0EX, Surrey, England.
   [Cowan, G.; Flaecher, H. U.; Hopkins, D. A.; Paramesvaran, S.; Salvatore, F.; Wren, A. C.] Bedford New Coll, Egham TW20 0EX, Surrey, England.
   [Brown, D. N.; Davis, C. L.] Univ Louisville, Louisville, KY 40292 USA.
   [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.] Univ Manchester, Manchester M13 9PL, Lancs, England.
   [Chen, C.; Jawahery, A.; Roberts, D. A.; Simi, G.; Tuggle, J. M.] Univ Maryland, College Pk, MD 20742 USA.
   [Dallapiccola, C.; Hertzbach, S. S.; 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.
   [Mclachlin, S. E.; Patel, P. M.; Robertson, S. H.] McGill Univ, Montreal, PQ H3A 2T8, Canada.
   [Lazzaro, A.; Lombardo, V.; Palombo, F.] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
   [Lazzaro, A.; Lombardo, V.; Palombo, F.] Ist Nazl Fis Nucl, 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.
   [Brunet, S.; Cote, D.; 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.; Sciacca, C.] Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy.
   [De Nardo, G.; Lista, L.; Monorchio, D.; Sciacca, C.] Ist Nazl Fis Nucl, I-80126 Naples, Italy.
   [Baak, M. A.; Raven, G.; Snoek, H. L.] NIKHEF, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands.
   [Jessop, C. P.; Knoepfel, K. J.; LoSecco, J. M.] 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.] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
   [Castelli, G.; Gagliardi, N.; Margoni, M.; Morandin, M.; Posocco, M.; Rotondo, M.; Simonetto, F.; Stroili, R.; Voci, C.] Ist Nazl Fis Nucl, I-35131 Padua, Italy.
   [Sanchez, P. Del Amo; Ben-Haim, E.; Briand, H.; Calderini, G.; Chauveau, J.; David, P.; Buono, L. Del; Hamon, O.; Leruste, Ph.; Ocariz, J.; Perez, A.; Prendki, J.] Univ Paris 07, Univ Paris 06, IN2P3, Lab Phys Nucl & Hautes Energies,CNRS, F-75252 Paris, France.
   [Gladney, L.] Univ Penn, Philadelphia, PA 19104 USA.
   [Biasini, M.; Covarelli, R.; Manoni, E.] Ist Nazl Fis Nucl, I-06100 Perugia, Italy.
   [Peruzzi, I. M.; 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.] Univ Pisa, Dipartimento Fis, I-56127 Pisa, 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, 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.
   [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.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
   [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.] Ist Nazl Fis Nucl, I-00185 Rome, Italy.
   [Hartmann, T.; Schroeder, H.; Waldi, R.] Univ Rostock, D-18051 Rostock, Germany.
   [Adye, T.; Franek, B.; Olaiya, E. O.; Roethel, W.; Wilson, F. F.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
   [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.; 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.; Ye, S.] Univ Texas Dallas, Richardson, TX 75083 USA.
   [Bianchi, F.; Gamba, D.; Pelliccioni, M.] Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
   [Bianchi, F.; Gamba, D.; Pelliccioni, M.] Ist Nazl Fis Nucl, I-10125 Turin, Italy.
   [Bomben, M.; Bosisio, L.; Cartaro, C.; Ricca, G. Della; Lanceri, L.; Vitale, L.] Ist Nazl Fis Nucl, I-34127 Trieste, Italy.
   [Bomben, M.; Bosisio, L.; Cartaro, C.; Ricca, G. Della; Lanceri, L.; Vitale, L.] Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy.
   [Azzolini, V.; Lopez-March, N.; Martinez-Vidal, F.; Milanes, D. A.; Oyanguren, A.] Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain.
   [Albert, J.; Banerjee, Sw.; Bhuyan, B.; Choi, H. H. F.; Hamano, K.; 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.
RP Aubert, B (reprint author), IN2P3, CNRS, 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 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;
   Raven, Gerhard/0000-0002-2897-5323; 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 38
TC 9
Z9 9
U1 0
U2 3
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 AUG
PY 2008
VL 78
IS 3
AR 032005
DI 10.1103/PhysRevD.78.032005
PG 14
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300009
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
   Button-Shafer, J
   Cahn, RN
   Jacobsen, RG
   Kadyk, JA
   Kerth, LT
   Kolomensky, YG
   Kukartsev, G
   Lynch, G
   Osipenkov, IL
   Ronan, MT
   Tackmann, K
   Tanabe, T
   Wenzel, WA
   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
   Saleem, M
   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
   Olivas, A
   Smith, JG
   Ulmer, KA
   Wagner, SR
   Ayad, R
   Gabareen, AM
   Soffer, A
   Toki, WH
   Wilson, RJ
   Altenburg, DD
   Feltresi, E
   Hauke, A
   Jasper, H
   Karbach, M
   Merkel, J
   Petzold, A
   Spaan, B
   Wacker, K
   Klose, V
   Kobel, MJ
   Lacker, HM
   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
   Anulli, F
   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
   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
   Wang, WF
   Wormser, G
   Lange, DJ
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   Marchiori, G
   Morganti, M
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   Rizzo, G
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   Cowan, R.
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   Gioi, L. Li
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   Morganti, S.
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   Schroeder, H.
   Waldi, R.
   Adye, T.
   Franek, B.
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   Roethel, W.
   Wilson, F. F.
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   Escalier, M.
   Esteve, L.
   Gaidot, A.
   Ganzhur, S. F.
   de Monchenault, G. Hamel
   Kozanecki, W.
   Vasseur, G.
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   Zito, M.
   Chen, X. R.
   Liu, H.
   Park, W.
   Purohit, M. V.
   White, R. M.
   Wilson, J. R.
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   Dorfan, J.
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   Grenier, P.
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   Muller, D. R.
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   Perl, M.
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   Schwiening, J.
   Snyder, A.
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   West, C. A.
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   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.
   Ye, S.
   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 Improved measurement of the CKM angle gamma in B(-/+)-> D((*))K((*)-/+)
   decays with a Dalitz plot analysis of D decays to K(S)(0)pi(+)pi(-) and
   K(S)(0)K(+)K(-)
SO PHYSICAL REVIEW D
LA English
DT Article
ID K-MATRIX FORMALISM; CP-VIOLATION; NONLEPTONIC DECAYS; B-MESONS;
   PARTICLES; RESONANCES; COLLISIONS; TENSORS; PHYSICS; D-S(+)
AB We report on an improved measurement of the Cabibbo-Kobayashi-Maskawa CP-violating phase gamma through a Dalitz plot analysis of neutral D meson decays to K(S)(0)pi(+)pi(-) and K(S)(0)K(+)K(-) produced in the processes B(-/+)-> DK(-/+), B(-/+)-> D(*)K(-/+) with D(*)-> D pi(0), D gamma, and B(-/+)-> DK(*-/+) with K(*-/+)-> K(S)(0)pi(-/+). Using a sample of 383x10(6) B (B) over bar pairs collected by the BABAR detector, we measure gamma=(76 +/- 22 +/- 5 +/- 5)degrees (mod 180 degrees), where the first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the uncertainty on the description of the Dalitz plot distributions. The corresponding 2-standard-deviation region is 29 degrees <gamma < 122 degrees. This result has a significance of direct CP violation (gamma not equal 0) of 3.0 standard deviations.
C1 [Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.] CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
   [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.
   [Garra Tico, J.; Grauges, E.] Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain.
   [Lopez, L.; Palano, A.; Pappagallo, M.] Univ Bari, Dipartimento Fis, I-70126 Bari, Italy.
   INFN, I-70126 Bari, Italy.
   [Eigen, G.; Stugu, B.; Sun, L.] Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
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   [Hawkes, C. M.; Soni, N.; Watson, A. T.] Univ Birmingham, Birmingham B15 2TT, England.
   [Koch, H.] Ruhr Univ Bochum, Inst Expt Phys, D-44780 Bochum, Germany.
   [Schroeder, T.] Univ Bristol, Bristol BS8 1TL, Avon, England.
   [Walker, D.; 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.; Saleem, M.; Teodorescu, L.] Brunel Univ, Uxbridge UB8 3PH, Middx, England.
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   [Andreotti, M.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cecchi, A.; Cibinetto, G.; Franchini, P.; Luppi, E.; Negrini, M.; Petrella, A.; Piemontese, L.; Santoro, V.] INFN, I-44100 Ferrara, Italy.
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   [Bevan, A. J.; George, K. A.; Di Lodovico, F.; Sacco, R.; Sigamani, M.] Univ London, London E1 4NS, England.
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   [Brown, D. N.; Davis, C. L.] Univ Louisville, Louisville, KY 40292 USA.
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   [Mclachlin, S. E.; Patel, P. M.; Robertson, S. H.] McGill Univ, Montreal, PQ H3A 2T8, Canada.
   [Lazzaro, A.; Lombardo, V.; Palombo, F.] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
   [Lazzaro, A.; Lombardo, V.; Palombo, F.] Ist Nazl Fis Nucl, 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.
   [Brunet, S.; Cote, D.; 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.; Sciacca, C.] Univ Naples Federico 2, Dipartimento Sci Fis, I-80126 Naples, Italy.
   [De Nardo, G.; Lista, L.; Monorchio, D.; Sciacca, C.] INFN, I-80126 Naples, Italy.
   [Baak, M. A.; Raven, G.; Snoek, H. L.] Natl Inst Nucl & High Energy Phys, NIKHEF, NL-1009 DB Amsterdam, Netherlands.
   [Jessop, C. P.; Knoepfel, K. J.; LoSecco, J. M.] 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.] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
   [Castelli, G.; Gagliardi, N.; Margoni, M.; Morandin, M.; Posocco, M.; Rotondo, M.; Simonetto, F.; Stroili, R.; Voci, C.] INFN, I-35131 Padua, Italy.
   [Buzzo, A.; Sanchez, P. del Amo; 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.
   [Peruzzi, I. M.; Biasini, M.; Covarelli, R.; Manoni, E.] Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
   [Biasini, M.; Covarelli, R.; Manoni, E.] INFN, 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.] Univ Pisa, Dipartimento Fis, Scuola Normale Super Pisa, I-56127 Pisa, 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.] INFN, 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.
   [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.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
   [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.] INFN, I-00185 Rome, Italy.
   [Ebert, M.; Hartmann, T.; Schroeder, H.; Waldi, R.] Univ Rostock, D-18051 Rostock, Germany.
   [Adye, T.; Franek, B.; Olaiya, E. O.; Roethel, W.; Wilson, F. F.] Rutherford Appleton Lab, Chilton OX11 0QX, Oxon, England.
   [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.; 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.
   [Buzzo, A.; 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.; Ye, S.] Univ Texas Dallas, Richardson, TX 75083 USA.
   [Bianchi, F.; Gamba, D.; Pelliccioni, M.] Univ Turin, Dipartimento Fis, I-10125 Turin, Italy.
   [Bianchi, F.; Gamba, D.; Pelliccioni, M.] Ist Nazl Fis Nucl, I-10125 Turin, Italy.
   [Bomben, M.; Bosisio, L.; Cartaro, C.; Della Ricca, G.; Lanceri, L.; Vitale, L.] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
   [Bomben, M.; Bosisio, L.; Cartaro, C.; Della Ricca, G.; Lanceri, L.; Vitale, L.] INFN, I-34127 Trieste, Italy.
   [Azzolini, V.; Lopez-March, N.; Martinez-Vidal, F.; Milanes, D. A.; Oyanguren, A.] Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain.
   [Albert, J.; Banerjee, Sw.; Bhuyan, B.; Choi, H. H. F.; Hamano, K.; 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.
RP Aubert, B (reprint author), CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
RI Rizzo, Giuliana/A-8516-2015; dong, liaoyuan/A-5093-2015; 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; 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; 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; Lista, Luca/C-5719-2008; 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
OI Rizzo, Giuliana/0000-0003-1788-2866; Paoloni,
   Eugenio/0000-0001-5969-8712; Faccini, Riccardo/0000-0003-2613-5141;
   Bettarini, Stefano/0000-0001-7742-2998; Cibinetto,
   Gianluigi/0000-0002-3491-6231; dong, liaoyuan/0000-0002-4773-5050;
   Pacetti, Simone/0000-0002-6385-3508; Covarelli,
   Roberto/0000-0003-1216-5235; 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; 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; 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;
   Negrini, Matteo/0000-0003-0101-6963
NR 64
TC 63
Z9 63
U1 1
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 AUG
PY 2008
VL 78
IS 3
AR 034023
DI 10.1103/PhysRevD.78.034023
PG 23
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300057
ER

PT J
AU Bauer, CW
   Fleming, S
   Lee, C
   Sterman, G
AF Bauer, Christian W.
   Fleming, Sean
   Lee, Christopher
   Sterman, George
TI Factorization of e(+)e(-) event shape distributions with hadronic final
   states in soft collinear effective theory
SO PHYSICAL REVIEW D
LA English
DT Article
ID QUANTUM CHROMODYNAMICS; E&E-ANNIHILATION; E+E ANNIHILATION; JET
   STRUCTURE; EXPONENTIATION; RESUMMATION; OPERATORS; MASS; QCD
AB We present a new analysis of two-jet event shape distributions in soft collinear effective theory. Extending previous results, we observe that a large class of such distributions can be expressed in terms of vacuum matrix elements of operators in the effective theory. We match these matrix elements to the full theory in the two-jet limit without assuming factorization of the complete set of hadronic final states into independent sums over partonic collinear and soft states. We also briefly discuss the relationship of this approach to diagrammatic factorization in the full theory.
C1 [Bauer, Christian W.; Lee, Christopher] Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   [Bauer, Christian W.; Lee, Christopher] Univ Calif Berkeley, Berkeley, CA 94720 USA.
   [Fleming, Sean] Univ Arizona, Tucson, AZ 85721 USA.
   [Sterman, George] SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA.
RP Bauer, CW (reprint author), Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
EM cwbauer@lbl.gov; fleming@physics.arizona.edu; clee@berkeley.edu;
   xsterman@insti.physics.sunysb.edu
RI Fleming, Sean/C-3677-2015; 
OI Fleming, Sean/0000-0002-9553-7198; Lee, Christopher/0000-0003-2385-7536
NR 45
TC 55
Z9 55
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD AUG
PY 2008
VL 78
IS 3
AR 034027
DI 10.1103/PhysRevD.78.034027
PG 12
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300061
ER

PT J
AU Berger, CF
   Bern, Z
   Dixon, LJ
   Cordero, FF
   Forde, D
   Ita, H
   Kosower, DA
   Maitre, D
AF Berger, C. F.
   Bern, Z.
   Dixon, L. J.
   Cordero, F. Febres
   Forde, D.
   Ita, H.
   Kosower, D. A.
   Maitre, D.
TI Automated implementation of on-shell methods for one-loop amplitudes
SO PHYSICAL REVIEW D
LA English
DT Review
ID JET CROSS-SECTIONS; TO-LEADING ORDER; HIGGS-BOSON PRODUCTION;
   SUPER-YANG-MILLS; GAUGE-THEORIES; SCATTERING-AMPLITUDES; HELICITY
   AMPLITUDES; QCD AMPLITUDES; DIMENSIONAL REGULARIZATION; MULTIPLE
   BREMSSTRAHLUNG
AB We present the first results from BLACKHAT, an automated C++ program for calculating one-loop amplitudes. The program implements the unitarity method and on-shell recursion to construct amplitudes. As input to the calculation, it uses compact analytic formulae for tree amplitudes for four-dimensional helicity states. The program performs all related computations numerically. We make use of recently developed on-shell methods for evaluating coefficients of loop integrals, introducing a discrete Fourier projection as a means of improving efficiency and numerical stability. We illustrate the numerical stability of our approach by computing and analyzing six-, seven-, and eight-gluon amplitudes in QCD and comparing against previously obtained analytic results.
C1 [Berger, C. F.] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA.
   [Berger, C. F.] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA.
   [Berger, C. F.; Dixon, L. J.; Forde, D.; Maitre, D.] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
   [Bern, Z.; Cordero, F. Febres; Forde, D.; Ita, H.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
   [Kosower, D. A.] CEA Saclay, Inst Phys Theor, F-91191 Gif Sur Yvette, France.
RP Berger, CF (reprint author), MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA.
FU U. S. Department of Energy [DE-FG03-91ER40662, DE-AC02-76SF00515]; U. S.
   Department Energy (D.O.E.) [DE-FC02-94ER40818]; National Science
   Foundation [PHY05-51164]; Agence Nationale de la Recherce of France
   [ANR-05-BLAN-0073-01]; Swiss National Science Foundation (SNF)
   [PBZH2-117028]
FX We would like to thank John Joseph Carrasco, Tanju Gleisberg, Henrik
   Johansson, and Michael Peskin for help-ful discussions. We are grateful
   to the Galileo Galilei Institute for Theoretical Physics for hospitality
   while part of this work was carried out. We also thank Academic
   Technology Services at UCLA for computer support. This research was
   supported by the U. S. Department of Energy under Contract Nos.
   DE-FG03-91ER40662 and DE-AC02-76SF00515. C.F.B.'s research was supported
   in part by funds provided by the U. S. Department Energy (D.O.E.) under
   Cooperative Research Agreement No. DE-FC02-94ER40818, and in part by the
   National Science Foundation under Grant No. PHY05-51164. D.A.K.'s
   research is supported by the Agence Nationale de la Recherce of France
   under Grant No. ANR-05-BLAN-0073-01. The work of D. M. was supported by
   the Swiss National Science Foundation (SNF) under Contract No.
   PBZH2-117028.
NR 141
TC 222
Z9 222
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 AUG
PY 2008
VL 78
IS 3
AR 036003
DI 10.1103/PhysRevD.78.036003
PG 17
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300100
ER

PT J
AU Bern, Z
   Dixon, LJ
   Kosower, DA
   Roiban, R
   Spradlin, M
   Vergu, C
   Volovich, A
AF Bern, Z.
   Dixon, L. J.
   Kosower, D. A.
   Roiban, R.
   Spradlin, M.
   Vergu, C.
   Volovich, A.
TI Two-loop six-gluon maximally helicity violating amplitude in maximally
   supersymmetric Yang-Mills theory
SO PHYSICAL REVIEW D
LA English
DT Review
ID SUDAKOV FORM-FACTOR; TO-LEADING ORDER; STRONG-COUPLING LIMIT; ONE-LOOP
   AMPLITUDES; N=4 SYM THEORY; GAUGE-THEORY; SCATTERING-AMPLITUDES; QCD
   AMPLITUDES; WILSON LOOPS; ASYMPTOTIC-BEHAVIOR
AB We give a representation of the parity-even part of the planar two-loop six-gluon maximally helicity violating (MHV) amplitude of N = 4 super-Yang-Mills theory, in terms of loop-momentum integrals with simple dual conformal properties. We evaluate the integrals numerically in order to test directly the Anastasiou-Bern-Dixon-Kosower/Bern-Dixon-Smirnov all-loop ansatz for planar MHV amplitudes. We find that the ansatz requires an additive remainder function, in accord with previous indications from strong-coupling and Regge limits. The planar six-gluon amplitude can also be compared with the hexagonal Wilson loop computed by Drummond, Henn, Korchemsky. and Sokatchev in arXiv:0803.1466. After accounting, for differing singularities and other constants independent of the kinematics, we find that the Wilson loop and MHV-amplitude remainders are identical, to within our numerical precision. This result provides nontrivial confirmation of a proposed n-point equivalence between Wilson loops and planar MHV amplitudes, and suggests that an additional mechanism besides dual conformal symmetry fixes their form at six points and beyond.
C1 [Bern, Z.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
   [Dixon, L. J.] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
   [Kosower, D. A.; Vergu, C.] CEA Saclay, Inst Phys Theor, F-91191 Gif Sur Yvette, France.
   [Roiban, R.] Penn State Univ, Dept Phys, University Pk, PA 16802 USA.
   [Spradlin, M.; Volovich, A.] Brown Univ, Dept Phys, Providence, RI 02912 USA.
RP Bern, Z (reprint author), Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
NR 129
TC 208
Z9 209
U1 0
U2 3
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 AUG
PY 2008
VL 78
IS 4
AR 045007
DI 10.1103/PhysRevD.78.045007
PG 25
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 350QP
UT WOS:000259368500102
ER

PT J
AU Chekanov, S
   Derrick, M
   Magill, S
   Musgrave, B
   Nicholass, D
   Repond, J
   Yoshida, R
   Mattingly, MCK
   Jechow, M
   Pavel, N
   Antonioli, P
   Bari, G
   Bellagamba, L
   Boscherini, D
   Bruni, A
   Bruni, G
   Cindolo, F
   Corradi, M
   Iacobucci, G
   Margotti, A
   Nania, R
   Polini, A
   Antonelli, S
   Basile, M
   Bindi, M
   Cifarelli, L
   Contin, A
   De Pasquale, S
   Sartorelli, G
   Zichichi, A
   Bartsch, D
   Brock, I
   Hartmann, H
   Hilger, E
   Jakob, HP
   Juengst, M
   Nuncio-Quiroz, AE
   Paul, E
   Renner, R
   Samson, U
   Schoenberg, V
   Shehzadi, R
   Wlasenko, M
   Brook, NH
   Heath, GP
   Morris, JD
   Capua, M
   Fazio, S
   Mastroberardino, A
   Schioppa, M
   Susinno, G
   Tassi, E
   Kim, JY
   Ibrahim, ZA
   Kamaluddin, B
   Wan Abdullah, WAT
   Ning, Y
   Ren, Z
   Sciulli, F
   Chwastowski, J
   Eskreys, A
   Figiel, J
   Galas, A
   Gil, M
   Olkiewicz, K
   Stopa, P
   Zawiejski, L
   Adamczyk, L
   Bold, T
   Grabowska-Bold, I
   Kisielewska, D
   Lukasik, J
   Przybycien, M
   Suszycki, L
   Kotanski, A
   Slominski, W
   Behrens, U
   Blohm, C
   Bonato, A
   Borras, K
   Ciesielski, R
   Coppola, N
   Drugakov, V
   Fang, S
   Fourletova, J
   Geiser, A
   Ttlicher, PG
   Grebenyuk, J
   Gregor, I
   Haas, T
   Hain, W
   Huttmann, A
   Januschek, F
   Kahle, B
   Katkov, II
   Klein, U
   Koetz, U
   Kowalski, H
   Lobodzinska, E
   Loehr, B
   Mankel, R
   Melzer-Pellmann, IA
   Miglioranzi, S
   Montanari, A
   Namsoo, T
   Notz, D
   Parenti, A
   Rinaldi, L
   Roloff, P
   Rubinsky, I
   Santamarta, R
   Schneekloth, U
   Spiridonov, A
   Szuba, D
   Szuba, J
   Theedt, T
   Wolf, G
   Wrona, K
   Molina, AGY
   Youngman, C
   Zeuner, W
   Drugakov, V
   Lohmann, W
   Schlenstedt, S
   Barbagli, G
   Gallo, E
   Pelfer, PG
   Bamberger, A
   Dobur, D
   Karstens, F
   Vlasov, NN
   Bussey, PJ
   Doyle, AT
   Dunne, W
   Forrest, M
   Rosin, M
   Saxon, DH
   Skillicorn, IO
   Gialas, I
   Papageorgiu, K
   Holm, U
   Klanner, R
   Lohrmann, E
   Schleper, P
   Schoerner-Sadenius, T
   Sztuk, J
   Stadie, H
   Turcato, M
   Foudas, C
   Fry, C
   Long, KR
   Tapper, AD
   Matsumoto, T
   Nagano, K
   Tokushuku, K
   Yamada, S
   Yamazaki, Y
   Barakbaev, AN
   Boos, EG
   Pokrovskiy, NS
   Zhautykov, BO
   Aushev, V
   Borodin, M
   Kozulia, A
   Lisovyi, M
   Son, D
   de Favereau, J
   Piotrzkowski, K
   Barreiro, F
   Glasman, C
   Jimenez, M
   Labarga, L
   del Peso, J
   Ron, E
   Soares, M
   Terron, J
   Zambrana, M
   Corriveau, F
   Liu, C
   Schwartz, J
   Walsh, R
   Zhou, C
   Tsurugai, T
   Antonov, A
   Dolgoshein, BA
   Gladkov, D
   Sosnovtsev, V
   Stifutkin, A
   Suchkov, S
   Dementiev, RK
   Ermolov, PF
   Gladilin, LK
   Golubkov, YA
   Khein, LA
   Korzhavina, IA
   Kuzmin, VA
   Levchenko, BB
   Lukina, OY
   Proskuryakov, AS
   Shcheglova, LM
   Zotkin, DS
   Abt, I
   Ttner, CB
   Caldwell, A
   Kollar, D
   Reisert, B
   Schmidke, WB
   Sutiak, J
   Grigorescu, G
   Keramidas, A
   Koffeman, E
   Kooijman, P
   Pellegrino, A
   Tiecke, H
   Vazquez, M
   Wiggers, L
   Brummer, N
   Bylsma, B
   Durkin, LS
   Lee, A
   Ling, TY
   Allfrey, PD
   Bell, MA
   Cooper-Sarkar, AM
   Devenish, RCE
   Ferrando, J
   Foster, B
   Korcsak-Gorzo, K
   Oliver, K
   Patel, S
   Roberfroid, V
   Robertson, A
   Straub, PB
   Uribe-Estrada, C
   Walczak, R
   Bertolin, A
   Dal Corso, F
   Dusini, S
   Longhin, A
   Stanco, L
   Bellan, P
   Brugnera, R
   Carlin, R
   Garfagnini, A
   Limentani, S
   Oh, BY
   Raval, A
   Ukleja, J
   Whitmore, JJ
   Iga, Y
   D'Agostini, G
   Marini, G
   Nigro, A
   Cole, JE
   Hart, JC
   Abramowicz, H
   Gabareen, A
   Ingbir, R
   Kananov, S
   Levy, A
   Smith, O
   Stern, A
   Kuze, M
   Maeda, J
   Hori, R
   Kagawa, S
   Okazaki, N
   Shimizu, S
   Tawara, T
   Hamatsu, R
   Kaji, H
   Kitamura, S
   Ota, O
   Ri, YD
   Costa, M
   Ferrero, MI
   Monaco, V
   Sacchi, R
   Solano, A
   Arneodo, M
   Ruspa, M
   Fourletov, S
   Martin, JF
   Stewart, TP
   Boutle, SK
   Butterworth, JM
   Gwenlan, C
   Jones, TW
   Loizides, JH
   Wing, M
   Brzozowska, B
   Ciborowski, J
   Grzelak, G
   Kulinski, P
   Luzniak, P
   Malka, J
   Nowak, RJ
   Pawlak, JM
   Tymieniecka, T
   Ukleja, A
   Arnecki, AFZ
   Adamus, M
   Plucinski, P
   Eisenberg, Y
   Hochman, D
   Karshon, U
   Brownson, E
   Danielson, T
   Everett, A
   Kcira, D
   Reeder, DD
   Ryan, P
   Savin, AA
   Smith, WH
   Wolfe, H
   Bhadra, S
   Catterall, CD
   Cui, Y
   Hartner, G
   Menary, S
   Noor, U
   Standage, J
   Whyte, J
AF Chekanov, S.
   Derrick, M.
   Magill, S.
   Musgrave, B.
   Nicholass, D.
   Repond, J.
   Yoshida, R.
   Mattingly, M. C. K.
   Jechow, M.
   Pavel, N.
   Antonioli, P.
   Bari, G.
   Bellagamba, L.
   Boscherini, D.
   Bruni, A.
   Bruni, G.
   Cindolo, F.
   Corradi, M.
   Iacobucci, G.
   Margotti, A.
   Nania, R.
   Polini, A.
   Antonelli, S.
   Basile, M.
   Bindi, M.
   Cifarelli, L.
   Contin, A.
   De Pasquale, S.
   Sartorelli, G.
   Zichichi, A.
   Bartsch, D.
   Brock, I.
   Hartmann, H.
   Hilger, E.
   Jakob, H. -P.
   Juengst, M.
   Nuncio-Quiroz, A. E.
   Paul, E.
   Renner, R.
   Samson, U.
   Schoenberg, V.
   Shehzadi, R.
   Wlasenko, M.
   Brook, N. H.
   Heath, G. P.
   Morris, J. D.
   Capua, M.
   Fazio, S.
   Mastroberardino, A.
   Schioppa, M.
   Susinno, G.
   Tassi, E.
   Kim, J. Y.
   Ibrahim, Z. A.
   Kamaluddin, B.
   Wan Abdullah, W. A. T.
   Ning, Y.
   Ren, Z.
   Sciulli, F.
   Chwastowski, J.
   Eskreys, A.
   Figiel, J.
   Galas, A.
   Gil, M.
   Olkiewicz, K.
   Stopa, P.
   Zawiejski, L.
   Adamczyk, L.
   Bold, T.
   Grabowska-Bold, I.
   Kisielewska, D.
   Lukasik, J.
   Przybycien, M.
   Suszycki, L.
   Kotanski, A.
   Slominski, W.
   Behrens, U.
   Blohm, C.
   Bonato, A.
   Borras, K.
   Ciesielski, R.
   Coppola, N.
   Drugakov, V.
   Fang, S.
   Fourletova, J.
   Geiser, A.
   Ttlicher, P. Go
   Grebenyuk, J.
   Gregor, I.
   Haas, T.
   Hain, W.
   Huttmann, A.
   Januschek, F.
   Kahle, B.
   Katkov, I. I.
   Klein, U.
   Koetz, U.
   Kowalski, H.
   Lobodzinska, E.
   Loehr, B.
   R., Mankel
   Melzer-Pellmann, I. -A.
   Miglioranzi, S.
   Montanari, A.
   Namsoo, T.
   Notz, D.
   Parenti, A.
   Rinaldi, L.
   Roloff, P.
   Rubinsky, I.
   Santamarta, R.
   Schneekloth, U.
   Spiridonov, A.
   Szuba, D.
   Szuba, J.
   Theedt, T.
   Wolf, G.
   Wrona, K.
   Molina, A. G. Yagues
   Youngman, C.
   Zeuner, W.
   Drugakov, V.
   Lohmann, W.
   Schlenstedt, S.
   Barbagli, G.
   Gallo, E.
   Pelfer, P. G.
   Bamberger, A.
   Dobur, D.
   Karstens, F.
   Vlasov, N. N.
   Bussey, P. J.
   Doyle, A. T.
   Dunne, W.
   Forrest, M.
   Rosin, M.
   Saxon, D. H.
   Skillicorn, I. O.
   Gialas, I.
   Papageorgiu, K.
   Holm, U.
   Klanner, R.
   Lohrmann, E.
   Schleper, P.
   Schoerner-Sadenius, T.
   Sztuk, J.
   Stadie, H.
   Turcato, M.
   Foudas, C.
   Fry, C.
   Long, K. R.
   Tapper, A. D.
   Matsumoto, T.
   Nagano, K.
   Tokushuku, K.
   Yamada, S.
   Yamazaki, Y.
   Barakbaev, A. N.
   Boos, E. G.
   Pokrovskiy, N. S.
   Zhautykov, B. O.
   Aushev, V.
   Borodin, M.
   Kozulia, A.
   Lisovyi, M.
   Son, D.
   de Favereau, J.
   Piotrzkowski, K.
   Barreiro, F.
   Glasman, C.
   Jimenez, M.
   Labarga, L.
   del Peso, J.
   Ron, E.
   Soares, M.
   Terron, J.
   Zambrana, M.
   Corriveau, F.
   Liu, C.
   Schwartz, J.
   Walsh, R.
   Zhou, C.
   Tsurugai, T.
   Antonov, A.
   Dolgoshein, B. A.
   Gladkov, D.
   Sosnovtsev, V.
   Stifutkin, A.
   Suchkov, S.
   Dementiev, R. K.
   Ermolov, P. F.
   Gladilin, L. K.
   Golubkov, Yu. A.
   Khein, L. A.
   Korzhavina, I. A.
   Kuzmin, V. A.
   Levchenko, B. B.
   Lukina, O. Yu.
   Proskuryakov, A. S.
   Shcheglova, L. M.
   Zotkin, D. S.
   Abt, I.
   Ttner, C. Bu
   Caldwell, A.
   Kollar, D.
   Reisert, B.
   Schmidke, W. B.
   Sutiak, J.
   Grigorescu, G.
   Keramidas, A.
   Koffeman, E.
   Kooijman, P.
   Pellegrino, A.
   Tiecke, H.
   Vazquez, M.
   Wiggers, L.
   Brummer, N.
   Bylsma, B.
   Durkin, L. S.
   Lee, A.
   Ling, T. Y.
   Allfrey, P. D.
   Bell, M. A.
   Cooper-Sarkar, A. M.
   Devenish, R. C. E.
   Ferrando, J.
   Foster, B.
   Korcsak-Gorzo, K.
   Oliver, K.
   Patel, S.
   Roberfroid, V.
   Robertson, A.
   Straub, P. B.
   Uribe-Estrada, C.
   Walczak, R.
   Bertolin, A.
   Corso, F. Dal
   Dusini, S.
   Longhin, A.
   Stanco, L.
   Bellan, P.
   Brugnera, R.
   Carlin, R.
   Garfagnini, A.
   Limentani, S.
   Oh, B. Y.
   Raval, A.
   Ukleja, J.
   Whitmore, J. J.
   Iga, Y.
   D'Agostini, G.
   Marini, G.
   Nigro, A.
   Cole, J. E.
   Hart, J. C.
   Abramowicz, H.
   Gabareen, A.
   Ingbir, R.
   Kananov, S.
   Levy, A.
   Smith, O.
   Stern, A.
   Kuze, M.
   Maeda, J.
   Hori, R.
   Kagawa, S.
   Okazaki, N.
   Shimizu, S.
   Tawara, T.
   Hamatsu, R.
   Kaji, H.
   Kitamura, S.
   Ota, O.
   Ri, Y. D.
   Costa, M.
   Ferrero, M. I.
   Monaco, V.
   Sacchi, R.
   Solano, A.
   Arneodo, M.
   Ruspa, M.
   Fourletov, S.
   Martin, J. F.
   Stewart, T. P.
   Boutle, S. K.
   Butterworth, J. M.
   Gwenlan, C.
   Jones, T. W.
   Loizides, J. H.
   Wing, M.
   Brzozowska, B.
   Ciborowski, J.
   Grzelak, G.
   Kulinski, P.
   Luzniak, P.
   Malka, J.
   Nowak, R. J.
   Pawlak, J. M.
   Tymieniecka, T.
   Ukleja, A.
   Arnecki, A. F. Z. .
   Adamus, M.
   Plucinski, P.
   Eisenberg, Y.
   Hochman, D.
   Karshon, U.
   Brownson, E.
   Danielson, T.
   Everett, A.
   Kcira, D.
   Reeder, D. D.
   Ryan, P.
   Savin, A. A.
   Smith, W. H.
   Wolfe, H.
   Bhadra, S.
   Catterall, C. D.
   Cui, Y.
   Hartner, G.
   Menary, S.
   Noor, U.
   Standage, J.
   Whyte, J.
CA ZEUS Collaboration
TI Multijet cross sections in charged current e(+/-)p scattering at HERA
SO PHYSICAL REVIEW D
LA English
DT Article
ID DEEP-INELASTIC-SCATTERING; CENTRAL TRACKING DETECTOR; PHYSICS EVENT
   GENERATION; ZEUS BARREL CALORIMETER; MONTE-CARLO GENERATOR; COLOR DIPOLE
   MODEL; PARTON DISTRIBUTIONS; HADRON-COLLISIONS; JET FRAGMENTATION; DIJET
   PRODUCTION
AB Jet cross sections were measured in charged-current deep inelastic e(+/-)p scattering at high boson virtualities Q(2) with the ZEUS detector at HERA II using an integrated luminosity of 0.36 fb(-1). Differential cross sections are presented for inclusive-jet production as functions of Q(2), Bjorken x and the jet transverse energy and pseudorapidity. The dijet invariant mass cross section is also presented. Observation of three- and four-jet events in charged-current e(+/-)p processes is reported for the first time. The predictions of next-to-leading-order (NLO) QCD calculations are compared to the measurements. The measured inclusive-jet cross sections are well described in shape and normalization by the NLO predictions. The data have the potential to constrain the u and d valence-quark distributions in the proton if included as input to global fits.
C1 [Chekanov, S.; Derrick, M.; Magill, S.; Musgrave, B.; Nicholass, D.; Repond, J.; Yoshida, R.] Argonne Natl Lab, Argonne, IL 60439 USA.
   [Mattingly, M. C. K.] Andrews Univ, Berrien Springs, MI 49104 USA.
   [Jechow, M.; Pavel, N.] Humboldt Univ, Inst Phys, Berlin, Germany.
   [Antonioli, P.; Bari, G.; Bellagamba, L.; Boscherini, D.; Bruni, A.; Bruni, G.; Cindolo, F.; Corradi, M.; Iacobucci, G.; Margotti, A.; Nania, R.; Polini, A.; Antonelli, S.; Basile, M.; Bindi, M.; Cifarelli, L.; Contin, A.; De Pasquale, S.; Sartorelli, G.; Zichichi, A.] Ist Nazl Fis Nucl, I-40126 Bologna, Italy.
   [Antonelli, S.; Basile, M.; Bindi, M.; Cifarelli, L.; Contin, A.; De Pasquale, S.; Sartorelli, G.; Zichichi, A.] Univ Bologna, Bologna, Italy.
   [Bartsch, D.; Brock, I.; Hartmann, H.; Hilger, E.; Jakob, H. -P.; Juengst, M.; Nuncio-Quiroz, A. E.; Paul, E.; Renner, R.; Samson, U.; Schoenberg, V.; Shehzadi, R.; Wlasenko, M.] Univ Bonn, Inst Phys, D-5300 Bonn, Germany.
   [Brook, N. H.; Morris, J. D.] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England.
   [Capua, M.; Fazio, S.; Mastroberardino, A.; Schioppa, M.; Susinno, G.; Tassi, E.] Univ Calabria, Dept Phys, I-87036 Cosenza, Italy.
   [Capua, M.; Fazio, S.; Mastroberardino, A.; Schioppa, M.; Susinno, G.; Tassi, E.] Ist Nazl Fis Nucl, Cosenza, Italy.
   [Kim, J. Y.] Chonnam Natl Univ, Kwangju, South Korea.
   [Ibrahim, Z. A.; Kamaluddin, B.; Wan Abdullah, W. A. T.] Univ Malaya, Kuala Lumpur 50603, Malaysia.
   [Ning, Y.; Ren, Z.; Sciulli, F.] Columbia Univ, Nevis Labs, New York, NY 10027 USA.
   [Chwastowski, J.; Eskreys, A.; Figiel, J.; Galas, A.; Gil, M.; Olkiewicz, K.; Stopa, P.; Zawiejski, L.] Polish Acad Sci, Henryk Niewodnoczanski Inst Nucl Phys, Krakow, Poland.
   [Adamczyk, L.; Bold, T.; Grabowska-Bold, I.; Kisielewska, D.; Lukasik, J.; Przybycien, M.; Suszycki, L.] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Krakow, Poland.
   [Kotanski, A.; Slominski, W.] Jagiellonian Univ, Dept Phys, Krakow, Poland.
   [Behrens, U.; Blohm, C.; Bonato, A.; Borras, K.; Ciesielski, R.; Coppola, N.; Drugakov, V.; Fang, S.; Fourletova, J.; Geiser, A.; Ttlicher, P. Go; Grebenyuk, J.; Gregor, I.; Haas, T.; Hain, W.; Huttmann, A.; Januschek, F.; Kahle, B.; Katkov, I. I.; Klein, U.; Koetz, U.; Kowalski, H.; Lobodzinska, E.; Loehr, B.; R., Mankel; Melzer-Pellmann, I. -A.; Miglioranzi, S.; Montanari, A.; Namsoo, T.; Notz, D.; Parenti, A.; Rinaldi, L.; Roloff, P.; Rubinsky, I.; Santamarta, R.; Schneekloth, U.; Spiridonov, A.; Szuba, D.; Szuba, J.; Theedt, T.; Wolf, G.; Wrona, K.; Molina, A. G. Yagues; Youngman, C.; Zeuner, W.] DESY, D-2000 Hamburg, Germany.
   [Drugakov, V.; Lohmann, W.; Schlenstedt, S.] DESY, Zeuthen, Germany.
   [Barbagli, G.; Gallo, E.; Pelfer, P. G.] Ist Nazl Fis Nucl, I-50125 Florence, Italy.
   [Pelfer, P. G.] Univ Florence, Florence, Italy.
   [Bamberger, A.; Dobur, D.; Karstens, F.; Vlasov, N. N.] Univ Freiburg, Fak Phys, D-7800 Freiburg, Germany.
   [Bussey, P. J.; Doyle, A. T.; Dunne, W.; Forrest, M.; Rosin, M.; Saxon, D. H.; Skillicorn, I. O.] Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland.
   [Gialas, I.; Papageorgiu, K.] Univ Aegean, Dept Engn Management Finance, Aegean, Greece.
   [Holm, U.; Klanner, R.; Lohrmann, E.; Schleper, P.; Schoerner-Sadenius, T.; Sztuk, J.; Stadie, H.; Turcato, M.; Wing, M.] Univ Hamburg, Inst Expt Phys, Hamburg, Germany.
   [Foudas, C.; Fry, C.; Long, K. R.; Tapper, A. D.] Univ London Imperial Coll Sci Technol & Med, High Energy Nucl Phys Grp, London, England.
   [Matsumoto, T.; Nagano, K.; Tokushuku, K.; Yamada, S.; Yamazaki, Y.] Natl Lab High Energy Phys, KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 305, Japan.
   [Barakbaev, A. N.; Boos, E. G.; Pokrovskiy, N. S.; Zhautykov, B. O.] Minist Educ & Sci Kazakhstan, Inst Phys & Technol, Alma Ata, Kazakhstan.
   [Aushev, V.; Borodin, M.; Kozulia, A.; Lisovyi, M.] Natl Acad Sci Ukraine, Inst Nucl Res, Kiev, Ukraine.
   [Aushev, V.; Borodin, M.; Kozulia, A.; Lisovyi, M.] Kiev Natl Univ, Kiev, Ukraine.
   [Son, D.] Kyungpook Natl Univ, Ctr High Energy Phys, Taegu, South Korea.
   [de Favereau, J.; Piotrzkowski, K.] Catholic Univ Louvain, Inst Phys Nucl, B-1348 Louvain, Belgium.
   [Barreiro, F.; Glasman, C.; Jimenez, M.; Labarga, L.; del Peso, J.; Ron, E.; Soares, M.; Terron, J.; Zambrana, M.] Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain.
   [Corriveau, F.; Liu, C.; Schwartz, J.; Walsh, R.; Zhou, C.] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
   [Tsurugai, T.] Meiji Gakuin Univ, Fac Gen Educ, Yokohama, Kanagawa, Japan.
   [Antonov, A.; Dolgoshein, B. A.; Gladkov, D.; Sosnovtsev, V.; Stifutkin, A.; Suchkov, S.] Moscow Engn Phys Inst, Moscow 115409, Russia.
   [Dementiev, R. K.; Ermolov, P. F.; Gladilin, L. K.; Golubkov, Yu. A.; Khein, L. A.; Korzhavina, I. A.; Kuzmin, V. A.; Levchenko, B. B.; Lukina, O. Yu.; Proskuryakov, A. S.; Shcheglova, L. M.; Zotkin, D. S.] Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow, Russia.
   [Abt, I.; Ttner, C. Bu; Caldwell, A.; Kollar, D.; Reisert, B.; Schmidke, W. B.; Sutiak, J.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
   [Grigorescu, G.; Keramidas, A.; Koffeman, E.; Kooijman, P.; Pellegrino, A.; Tiecke, H.; Vazquez, M.; Wiggers, L.] NIKHEF, Amsterdam, Netherlands.
   [Grigorescu, G.; Keramidas, A.; Koffeman, E.; Kooijman, P.; Pellegrino, A.; Tiecke, H.; Vazquez, M.; Wiggers, L.] Univ Amsterdam, Amsterdam, Netherlands.
   [Brummer, N.; Bylsma, B.; Durkin, L. S.; Lee, A.; Ling, T. Y.] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
   [Allfrey, P. D.; Bell, M. A.; Cooper-Sarkar, A. M.; Devenish, R. C. E.; Ferrando, J.; Foster, B.; Korcsak-Gorzo, K.; Oliver, K.; Patel, S.; Roberfroid, V.; Robertson, A.; Straub, P. B.; Uribe-Estrada, C.; Walczak, R.] Univ Oxford, Dept Phys, Oxford, England.
   [Bertolin, A.; Corso, F. Dal; Dusini, S.; Longhin, A.; Stanco, L.; Bellan, P.; Brugnera, R.; Carlin, R.; Garfagnini, A.; Limentani, S.] Ist Nazl Fis Nucl, Padua, Italy.
   [Bellan, P.; Brugnera, R.; Carlin, R.; Garfagnini, A.; Limentani, S.] Univ Padua, Dipartimento Fis, Padua, Italy.
   [Oh, B. Y.; Raval, A.; Ukleja, J.; Whitmore, J. J.] Penn State Univ, Dept Phys, University Pk, PA 16802 USA.
   Polytech Univ, Sagamihara, Kanagawa, Japan.
   [D'Agostini, G.; Marini, G.; Nigro, A.] Ist Nazl Fis Nucl, Rome, Italy.
   [D'Agostini, G.; Marini, G.; Nigro, A.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
   [Cole, J. E.; Hart, J. C.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
   [Abramowicz, H.; Gabareen, A.; Ingbir, R.; Kananov, S.; Levy, A.; Smith, O.; Stern, A.] Tel Aviv Univ, Sch Phys, Raymond & Beverly Sackler Fac Exact Sci, IL-69978 Tel Aviv, Israel.
   [Kuze, M.; Maeda, J.] Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan.
   [Hori, R.; Kagawa, S.; Okazaki, N.; Shimizu, S.; Tawara, T.] Univ Tokyo, Dept Phys, Tokyo 113, Japan.
   [Hamatsu, R.; Kaji, H.; Kitamura, S.; Ota, O.; Ri, Y. D.] Tokyo Metropolitan Univ, Dept Phys, Tokyo, Japan.
   [Costa, M.; Ferrero, M. I.; Monaco, V.; Sacchi, R.; Solano, A.; Arneodo, M.; Ruspa, M.] Ist Nazl Fis Nucl, I-10125 Turin, Italy.
   [Costa, M.; Ferrero, M. I.; Monaco, V.; Sacchi, R.; Solano, A.] Univ Turin, Turin, Italy.
   [Arneodo, M.; Ruspa, M.] Univ Piemonte Orientale, Turin, Italy.
   [Fourletov, S.; Martin, J. F.; Stewart, T. P.] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada.
   [Boutle, S. K.; Butterworth, J. M.; Gwenlan, C.; Jones, T. W.; Loizides, J. H.; Wing, M.; Ukleja, A.] UCL, Dept Phys & Astron, London, England.
   [Brzozowska, B.; Ciborowski, J.; Grzelak, G.; Kulinski, P.; Luzniak, P.; Malka, J.; Nowak, R. J.; Pawlak, J. M.; Tymieniecka, T.; Arnecki, A. F. Z. .] Warsaw Univ, Inst Expt Phys, Warsaw, Poland.
   [Adamus, M.; Plucinski, P.] Inst Nucl Studies, PL-00681 Warsaw, Poland.
   [Eisenberg, Y.; Hochman, D.; Karshon, U.] Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel.
   [Brownson, E.; Danielson, T.; Everett, A.; Kcira, D.; Reeder, D. D.; Ryan, P.; Savin, A. A.; Smith, W. H.; Wolfe, H.] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
   [Bhadra, S.; Catterall, C. D.; Cui, Y.; Hartner, G.; Menary, S.; Noor, U.; Standage, J.; Whyte, J.] York Univ, Dept Phys, N York, ON M3J 1P3, Canada.
   [Nicholass, D.] UCL, London WC1E 6BT, England.
   [Spiridonov, A.] Inst Theoret & Expt Phys, Moscow 117259, Russia.
   [Szuba, D.] INP, Krakow, Poland.
   [Szuba, J.] AGH Univ Sci & Technol, FPACS, Krakow, Poland.
   [Gialas, I.; Boutle, S. K.] DESY, Hamburg, Germany.
   [Abramowicz, H.] Max Planck Inst, Munich, Germany.
   [Ciborowski, J.] Univ Lodz, PL-90131 Lodz, Poland.
RP Chekanov, S (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Doyle, Anthony/C-5889-2009; IBRAHIM, ZAINOL ABIDIN/C-1121-2010;
   Proskuryakov, Alexander/J-6166-2012; Fazio, Salvatore /G-5156-2010; WAN
   ABDULLAH, WAN AHMAD TAJUDDIN/B-5439-2010; Dementiev, Roman/K-7201-2012;
   Korzhavina, Irina/D-6848-2012; Wiggers, Leo/B-5218-2015; Ferrando,
   James/A-9192-2012; Gladilin, Leonid/B-5226-2011; Levchenko,
   B./D-9752-2012; Tassi, Enrico/K-3958-2015; Bastero-Gil, Mar/F-1405-2016;
   De Pasquale, Salvatore/B-9165-2008; dusini, stefano/J-3686-2012; Capua,
   Marcella/A-8549-2015; 
OI Doyle, Anthony/0000-0001-6322-6195; Wiggers, Leo/0000-0003-1060-0520;
   Ferrando, James/0000-0002-1007-7816; Gladilin,
   Leonid/0000-0001-9422-8636; Bastero-Gil, Mar/0000-0001-9962-5905; De
   Pasquale, Salvatore/0000-0001-9236-0748; dusini,
   stefano/0000-0002-1128-0664; Capua, Marcella/0000-0002-2443-6525;
   Arneodo, Michele/0000-0002-7790-7132; Longhin,
   Andrea/0000-0001-9103-9936; Raval, Amita/0000-0003-0164-4337
NR 74
TC 7
Z9 7
U1 0
U2 6
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 AUG
PY 2008
VL 78
IS 3
AR 032004
DI 10.1103/PhysRevD.78.032004
PG 27
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300008
ER

PT J
AU Cheng, M
   Datta, S
   van der Heide, J
   Huebner, K
   Karsch, F
   Kaczmarek, O
   Laermann, E
   Liddle, J
   Mawhinney, RD
   Miao, C
   Petreczky, P
   Petrov, K
   Schmidt, C
   Soeldner, W
   Umeda, T
AF Cheng, M.
   Datta, S.
   van der Heide, J.
   Huebner, K.
   Karsch, F.
   Kaczmarek, O.
   Laermann, E.
   Liddle, J.
   Mawhinney, R. D.
   Miao, C.
   Petreczky, P.
   Petrov, K.
   Schmidt, C.
   Soeldner, W.
   Umeda, T.
TI The spatial string tension and dimensional reduction in QCD
SO PHYSICAL REVIEW D
LA English
DT Article
ID SU(2) GAUGE-THEORY; ADJOINT HIGGS-MODEL; QUANTUM CHROMODYNAMICS;
   PERTURBATION-THEORY; TEMPERATURE QCD; FREE-ENERGY; HOT QCD;
   THERMODYNAMICS; FERMIONS; RENORMALIZATION
AB We calculate the spatial string tension in (2+1) flavor QCD with physical strange quark mass and almost physical light quark masses using lattices with temporal extent N-tau=4, 6 and 8. We compare our results on the spatial string tension with predictions of dimensionally reduced QCD. This suggests that also in the presence of light dynamical quarks dimensional reduction works well down to temperatures 1.5T(c).
C1 [Cheng, M.; Mawhinney, R. D.] Columbia Univ, Dept Phys, New York, NY 10027 USA.
   [Datta, S.] Tata Inst Fundamental Res, Dept Theoret Phys, Bombay 400005, Maharashtra, India.
   [van der Heide, J.; Karsch, F.; Kaczmarek, O.; Laermann, E.; Liddle, J.; Miao, C.] Univ Bielefeld, Fak Phys, D-33615 Bielefeld, Germany.
   [Huebner, K.; Karsch, F.; Petreczky, P.; Schmidt, C.; Soeldner, W.] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
   [Petreczky, P.] Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA.
   [Petrov, K.] DESY, Zeuthen, Germany.
   [Umeda, T.] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan.
RP Cheng, M (reprint author), Columbia Univ, Dept Phys, 538 W 120th St, New York, NY 10027 USA.
RI Kaczmarek, Olaf/E-9932-2011; 
OI Schmidt, Christian/0000-0002-9071-4757
NR 55
TC 17
Z9 18
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 AUG
PY 2008
VL 78
IS 3
AR 034506
DI 10.1103/PhysRevD.78.034506
PG 8
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300081
ER

PT J
AU Cravens, JP
   Abe, K
   Iida, T
   Ishihara, K
   Kameda, J
   Koshio, Y
   Minamino, A
   Mitsuda, C
   Miura, M
   Moriyama, S
   Nakahata, M
   Nakayama, S
   Obayashi, Y
   Ogawa, H
   Sekiya, H
   Shiozawa, M
   Suzuki, Y
   Takeda, A
   Takeuchi, Y
   Ueshima, K
   Watanabe, H
   Yamada, S
   Higuchi, I
   Ishihara, C
   Ishitsuka, M
   Kajita, T
   Kaneyuki, K
   Mitsuka, G
   Nishino, H
   Okumura, K
   Saji, C
   Takenaga, Y
   Clark, S
   Desai, S
   Dufour, F
   Kearns, E
   Likhoded, S
   Litos, M
   Raaf, JL
   Stone, JL
   Sulak, LR
   Wang, W
   Goldhaber, M
   Casper, D
   Dunmore, J
   Kropp, WR
   Liu, DW
   Mine, S
   Regis, C
   Smy, MB
   Sobel, HW
   Vagins, MR
   Ganezer, KS
   Hill, J
   Keig, WE
   Jang, JS
   Kim, JY
   Lim, IT
   Fechner, M
   Scholberg, K
   Tanimoto, N
   Walter, CW
   Wendell, R
   Ellsworth, RW
   Tasaka, S
   Guillian, G
   Learned, JG
   Matsuno, S
   Messier, MD
   Watanabe, Y
   Hayato, Y
   Ichikawa, AK
   Ishida, T
   Ishii, T
   Iwashita, T
   Kobayashi, T
   Nakadaira, T
   Nakamura, K
   Nitta, K
   Oyama, Y
   Totsuka, Y
   Suzuki, AT
   Hasegawa, M
   Hiraide, K
   Kato, I
   Maesaka, H
   Nakaya, T
   Nishikawa, K
   Sasaki, T
   Sato, H
   Yamamoto, S
   Yokoyama, M
   Haines, TJ
   Dazeley, S
   Hatakeyama, S
   Svoboda, R
   Sullivan, GW
   Turcan, D
   Habig, A
   Fukuda, Y
   Sato, T
   Itow, Y
   Koike, T
   Tanaka, T
   Jung, CK
   Kato, T
   Kobayashi, K
   Malek, M
   McGrew, C
   Sarrat, A
   Terri, R
   Yanagisawa, C
   Tamura, N
   Idehara, Y
   Ikeda, M
   Sakuda, M
   Sugihara, M
   Kuno, Y
   Yoshida, M
   Kim, SB
   Yang, BS
   Yoo, J
   Ishizuka, T
   Okazawa, H
   Choi, Y
   Seo, HK
   Gando, Y
   Hasegawa, T
   Inoue, K
   Furuse, Y
   Ishii, H
   Nishijima, K
   Ishino, H
   Koshiba, M
   Chen, S
   Deng, Z
   Liu, Y
   Kielczewska, D
   Berns, H
   Gran, R
   Shiraishi, KK
   Stachyra, A
   Thrane, E
   Washburn, K
   Wilkes, RJ
AF Cravens, J. P.
   Abe, K.
   Iida, T.
   Ishihara, K.
   Kameda, J.
   Koshio, Y.
   Minamino, A.
   Mitsuda, C.
   Miura, M.
   Moriyama, S.
   Nakahata, M.
   Nakayama, S.
   Obayashi, Y.
   Ogawa, H.
   Sekiya, H.
   Shiozawa, M.
   Suzuki, Y.
   Takeda, A.
   Takeuchi, Y.
   Ueshima, K.
   Watanabe, H.
   Yamada, S.
   Higuchi, I.
   Ishihara, C.
   Ishitsuka, M.
   Kajita, T.
   Kaneyuki, K.
   Mitsuka, G.
   Nishino, H.
   Okumura, K.
   Saji, C.
   Takenaga, Y.
   Clark, S.
   Desai, S.
   Dufour, F.
   Kearns, E.
   Likhoded, S.
   Litos, M.
   Raaf, J. L.
   Stone, J. L.
   Sulak, L. R.
   Wang, W.
   Goldhaber, M.
   Casper, D.
   Dunmore, J.
   Kropp, W. R.
   Liu, D. W.
   Mine, S.
   Regis, C.
   Smy, M. B.
   Sobel, H. W.
   Vagins, M. R.
   Ganezer, K. S.
   Hill, J.
   Keig, W. E.
   Jang, J. S.
   Kim, J. Y.
   Lim, I. T.
   Fechner, M.
   Scholberg, K.
   Tanimoto, N.
   Walter, C. W.
   Wendell, R.
   Ellsworth, R. W.
   Tasaka, S.
   Guillian, G.
   Learned, J. G.
   Matsuno, S.
   Messier, M. D.
   Watanabe, Y.
   Hayato, Y.
   Ichikawa, A. K.
   Ishida, T.
   Ishii, T.
   Iwashita, T.
   Kobayashi, T.
   Nakadaira, T.
   Nakamura, K.
   Nitta, K.
   Oyama, Y.
   Totsuka, Y.
   Suzuki, A. T.
   Hasegawa, M.
   Hiraide, K.
   Kato, I.
   Maesaka, H.
   Nakaya, T.
   Nishikawa, K.
   Sasaki, T.
   Sato, H.
   Yamamoto, S.
   Yokoyama, M.
   Haines, T. J.
   Dazeley, S.
   Hatakeyama, S.
   Svoboda, R.
   Sullivan, G. W.
   Turcan, D.
   Habig, A.
   Fukuda, Y.
   Sato, T.
   Itow, Y.
   Koike, T.
   Tanaka, T.
   Jung, C. K.
   Kato, T.
   Kobayashi, K.
   Malek, M.
   McGrew, C.
   Sarrat, A.
   Terri, R.
   Yanagisawa, C.
   Tamura, N.
   Idehara, Y.
   Ikeda, M.
   Sakuda, M.
   Sugihara, M.
   Kuno, Y.
   Yoshida, M.
   Kim, S. B.
   Yang, B. S.
   Yoo, J.
   Ishizuka, T.
   Okazawa, H.
   Choi, Y.
   Seo, H. K.
   Gando, Y.
   Hasegawa, T.
   Inoue, K.
   Furuse, Y.
   Ishii, H.
   Nishijima, K.
   Ishino, H.
   Koshiba, M.
   Chen, S.
   Deng, Z.
   Liu, Y.
   Kielczewska, D.
   Berns, H.
   Gran, R.
   Shiraishi, K. K.
   Stachyra, A.
   Thrane, E.
   Washburn, K.
   Wilkes, R. J.
CA Super-Kamiokande Collaboration
TI Solar neutrino measurements in Super-Kamiokande-II
SO PHYSICAL REVIEW D
LA English
DT Article
ID OSCILLATIONS; DETECTOR; SPECTRUM; MATTER
AB The results of the second phase of the Super-Kamiokande solar neutrino measurement are presented and compared to the first phase. The solar neutrino flux spectrum and time variation as well as oscillation results are statistically consistent with the first phase and do not show spectral distortion. The time-dependent flux measurement of the combined first and second phases coincides with the full period of solar cycle 23 and shows no correlation with solar activity. The measured B-8 total flux is (2.38 +/- 0.05(stat.)(-0.15)(+0.16)(sys.))x10(6) cm(-2) s(-1) and the day-night difference is found to be (-6.3 +/- 4.2(stat.)+/- 3.7(sys.))%. There is no evidence of systematic tendencies between the first and second phases.
C1 [Cravens, J. P.; Casper, D.; Dunmore, J.; Kropp, W. R.; Liu, D. W.; Mine, S.; Regis, C.; Smy, M. B.; Sobel, H. W.; Vagins, M. R.] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
   [Higuchi, I.; Ishihara, C.; Ishitsuka, M.; Kajita, T.; Kaneyuki, K.; Mitsuka, G.; Nishino, H.; Okumura, K.; Saji, C.; Takenaga, Y.] Univ Tokyo, Inst Cosm Ray Res, Res Ctr Cosm Neutrinos, Chiba 2778582, Japan.
   [Nakahata, M.; Suzuki, Y.; Kajita, T.] Univ Tokyo, Inst Phys & Math, Chiba 2778582, Japan.
   [Clark, S.; Desai, S.; Dufour, F.; Kearns, E.; Likhoded, S.; Litos, M.; Raaf, J. L.; Stone, J. L.; Sulak, L. R.; Wang, W.] Boston Univ, Dept Phys, Boston, MA 02215 USA.
   [Goldhaber, M.] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
   [Ganezer, K. S.; Hill, J.; Keig, W. E.] Calif State Univ Dominguez Hills, Dept Phys, Carson, CA 90747 USA.
   [Jang, J. S.; Kim, J. Y.; Lim, I. T.] Chonnam Natl Univ, Dept Phys, Kwangju 500757, South Korea.
   [Fechner, M.; Scholberg, K.; Tanimoto, N.; Walter, C. W.; Wendell, R.] Duke Univ, Dept Phys, Durham, NC 27708 USA.
   [Ellsworth, R. W.] George Mason Univ, Dept Phys, Fairfax, VA 22030 USA.
   [Tasaka, S.] Gifu Univ, Dept Phys, Gifu 5011193, Japan.
   [Guillian, G.; Learned, J. G.; Matsuno, S.] Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA.
   [Messier, M. D.] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA.
   [Watanabe, Y.] Kanagawa Univ, Dept Engn, Div Phys, Yokohama, Kanagawa 2218686, Japan.
   [Hayato, Y.; Ichikawa, A. K.; Ishida, T.; Ishii, T.; Iwashita, T.; Kobayashi, T.; Nakadaira, T.; Nakamura, K.; Nitta, K.; Oyama, Y.; Totsuka, Y.] High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan.
   [Suzuki, A. T.] Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan.
   [Hasegawa, M.; Hiraide, K.; Kato, I.; Maesaka, H.; Nakaya, T.; Nishikawa, K.; Sasaki, T.; Sato, H.; Yamamoto, S.; Yokoyama, M.] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan.
   [Haines, T. J.] Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87544 USA.
   [Dazeley, S.; Hatakeyama, S.; Svoboda, R.] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
   [Sullivan, G. W.; Turcan, D.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
   [Habig, A.] Univ Minnesota, Dept Phys, Duluth, MN 55812 USA.
   [Fukuda, Y.; Sato, T.] Miyagi Univ Educ, Dept Phys, Sendai, Miyagi 9800845, Japan.
   [Itow, Y.; Koike, T.; Tanaka, T.] Nagoya Univ, Solar Terr Environm Lab, Aichi 4648602, Japan.
   [Jung, C. K.; Kato, T.; Kobayashi, K.; Malek, M.; McGrew, C.; Sarrat, A.; Terri, R.; Yanagisawa, C.] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
   [Tamura, N.] Niigata Univ, Dept Phys, Niigata 9502181, Japan.
   [Idehara, Y.; Ikeda, M.; Sakuda, M.; Sugihara, M.] Okayama Univ, Dept Phys, Okayama 7008530, Japan.
   [Kuno, Y.; Yoshida, M.] Osaka Univ, Dept Phys, Osaka 5600043, Japan.
   [Kim, S. B.; Yang, B. S.; Yoo, J.] Seoul Natl Univ, Dept Phys, Seoul 151742, South Korea.
   [Ishizuka, T.] Shizuoka Univ, Dept Syst Engn, Hamamatsu, Shizuoka 4328561, Japan.
   [Okazawa, H.] Shizuoka Univ Welfare, Dept Informat Social Welfare, Shizuoka 4258611, Japan.
   [Choi, Y.; Seo, H. K.] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea.
   [Gando, Y.; Hasegawa, T.; Inoue, K.] Tohoku Univ, Res Ctr Neutrino Sci, Sendai, Miyagi 9808578, Japan.
   [Furuse, Y.; Ishii, H.; Nishijima, K.] Tokai Univ, Dept Phys, Kanagawa 2591292, Japan.
   [Ishino, H.] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan.
   [Koshiba, M.] Univ Tokyo, Tokyo 1130033, Japan.
   [Chen, S.; Deng, Z.; Liu, Y.] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China.
   [Kielczewska, D.] Warsaw Univ, Inst Expt Phys, PL-00681 Warsaw, Poland.
   [Berns, H.; Gran, R.; Shiraishi, K. K.; Stachyra, A.; Thrane, E.; Washburn, K.; Wilkes, R. J.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
   [Abe, K.; Iida, T.; Ishihara, K.; Kameda, J.; Koshio, Y.; Minamino, A.; Mitsuda, C.; Miura, M.; Moriyama, S.; Nakahata, M.; Nakayama, S.; Obayashi, Y.; Ogawa, H.; Sekiya, H.; Shiozawa, M.; Suzuki, Y.; Takeda, A.; Takeuchi, Y.; Ueshima, K.; Watanabe, H.; Yamada, S.] Univ Tokyo, Inst Cosm Ray Res, Kamioka Observ, Gifu 5061205, Japan.
RP Cravens, JP (reprint author), Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
RI Yokoyama, Masashi/A-4458-2011; Nakamura, Kenzo/F-7174-2010; Hiraide,
   Katsuki/A-4479-2011; Yoo, Jonghee/K-8394-2016; Sobel, Henry/A-4369-2011;
   Obayashi, Yoshihisa/A-4472-2011; Suzuki, Yoichiro/F-7542-2010; Takeuchi,
   Yasuo/A-4310-2011; Wilkes, R.Jeffrey/E-6011-2013; Kim,
   Soo-Bong/B-7061-2014; Ishino, Hirokazu/C-1994-2015; Koshio,
   Yusuke/C-2847-2015; 
OI Yokoyama, Masashi/0000-0003-2742-0251; Ishino,
   Hirokazu/0000-0002-8623-4080; Koshio, Yusuke/0000-0003-0437-8505; Raaf,
   Jennifer/0000-0002-4533-929X
NR 19
TC 153
Z9 155
U1 0
U2 6
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 AUG
PY 2008
VL 78
IS 3
AR 032002
DI 10.1103/PhysRevD.78.032002
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300006
ER

PT J
AU Deur, A
   Bosted, P
   Burkert, V
   Crabb, D
   Dharmawardane, V
   Dodge, GE
   Forest, TA
   Griffioen, KA
   Kuhn, SE
   Minehart, R
   Prok, Y
AF Deur, A.
   Bosted, P.
   Burkert, V.
   Crabb, D.
   Dharmawardane, V.
   Dodge, G. E.
   Forest, T. A.
   Griffioen, K. A.
   Kuhn, S. E.
   Minehart, R.
   Prok, Y.
TI Experimental study of isovector spin sum rules
SO PHYSICAL REVIEW D
LA English
DT Article
ID STRUCTURE FUNCTIONS G(1)(P); DEEP INELASTIC-SCATTERING; STRUCTURE
   FUNCTIONS G(2); PRECISION-MEASUREMENT; POLARIZED NUCLEONS; POWER
   CORRECTIONS; MAGNETIC MOMENTS; RESONANCE REGION; ASYMMETRY A(2); PROTON
AB We present the Bjorken integral extracted from Jefferson Lab experiment EG1b for 0.05 < Q(2)< 2.92 GeV2. The integral is fit to extract the twist-4 element f(2)(p-n) which appears to be relatively large and negative. Systematic studies of this higher twist analysis establish its legitimacy at Q(2) around 1 GeV2. We also performed an isospin decomposition of the generalized forward spin polarizability gamma(0). Although its isovector part provides a reliable test of the calculation techniques of chiral perturbation theory, our data disagree with the calculations.
C1 [Deur, A.; Bosted, P.; Burkert, V.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
   [Crabb, D.; Minehart, R.; Prok, Y.] Univ Virginia, Charlottesville, VA 22904 USA.
   [Dharmawardane, V.; Dodge, G. E.; Kuhn, S. E.] Old Dominion Univ, Norfolk, VA 23529 USA.
   [Forest, T. A.] Idaho State Univ, Pocatello, ID 83209 USA.
   [Griffioen, K. A.] Coll William & Mary, Williamsburg, VA 23187 USA.
RP Deur, A (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
NR 75
TC 27
Z9 27
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 AUG
PY 2008
VL 78
IS 3
AR 032001
DI 10.1103/PhysRevD.78.032001
PG 7
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300005
ER

PT J
AU Dimopoulos, S
   Graham, PW
   Hogan, JM
   Kasevich, MA
AF Dimopoulos, Savas
   Graham, Peter W.
   Hogan, Jason M.
   Kasevich, Mark A.
TI General relativistic effects in atom interferometry
SO PHYSICAL REVIEW D
LA English
DT Article
ID WAVE BEAM-SPLITTERS; RAMAN TRANSITIONS; RAMSEY FRINGES; GRAVITY;
   ACCELERATION; POTENTIALS; CURVATURE; PRINCIPLE; CONSTANT; ROTATION
AB Atom interferoinetry is now reaching sufficient precision to motivate laboratory tests of general relativity. We begin by explaining the nonrelativistic calculation of the phase shift in an atom interferometer and deriving its range of validity. From this, we develop a method for calculating the phase shift in general relativity. Both the atoms and the light are treated relativistically and all coordinate dependencies are removed, thus revealing novel terms, cancellations, and new origins for previously calculated terms. This formalism is then used to find the relativistic effects in an atom interferometer in a weak gravitational field for application to laboratory tests of general relativity. The potentially testable relativistic effects include the nonlinear three-graviton coupling, the gravity of kinetic energy, and the falling of light. We propose specific experiments, one Currently under construction, to measure each of these effects. These experiments Could provide a test of the principle of equivalence to 1 part in 10(15) (300 times better than the present limit), and general relativity at the 10% level, with many potential future improvements. We also consider applications to other metrics including the Lense-Thirring effect, the expansion of the Universe, and preferred frame and location effects.
C1 [Dimopoulos, Savas; Graham, Peter W.; Hogan, Jason M.; Kasevich, Mark A.] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
   [Graham, Peter W.] Stanford Univ, SLAC, Menlo Pk, CA 94025 USA.
RP Dimopoulos, S (reprint author), Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
OI Graham, Peter/0000-0002-1600-1601
NR 74
TC 82
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U1 3
U2 18
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 AUG
PY 2008
VL 78
IS 4
AR 042003
DI 10.1103/PhysRevD.78.042003
PG 29
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 350QP
UT WOS:000259368500007
ER

PT J
AU Dodelson, S
   Schmidt, F
   Vallinotto, A
AF Dodelson, Scott
   Schmidt, Fabian
   Vallinotto, Alberto
TI Universal weak lensing distortion of cosmological correlation functions
SO PHYSICAL REVIEW D
LA English
DT Article
ID MICROWAVE BACKGROUND ANISOTROPIES; POWER SPECTRUM; GALAXIES; PARAMETERS;
   SPACE; TOMOGRAPHY
AB Gravitational lensing affects observed cosmological correlation functions because observed images do not coincide with true source locations. We treat this universal effect in a general way here, deriving a single formula that can be used to determine to what extent this effect distorts any correlation function. We then apply the general formula to the correlation functions of galaxies, the 21-cm radiation field, and the cosmic microwave background.
C1 [Dodelson, Scott] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
   [Dodelson, Scott; Schmidt, Fabian] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
   [Schmidt, Fabian] Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
   [Vallinotto, Alberto] Univ Paris 06, CNRS, UMR7095, Inst Astrophys Paris, F-75014 Paris, France.
RP Dodelson, S (reprint author), Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, POB 500, Batavia, IL 60510 USA.
EM dodelson@canis.fnal.gov; fabians@uchicago.edu; vallinot@iap.fr
OI Schmidt, Fabian/0000-0002-6807-7464
NR 35
TC 7
Z9 7
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 AUG
PY 2008
VL 78
IS 4
AR 043508
DI 10.1103/PhysRevD.78.043508
PG 12
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 350QP
UT WOS:000259368500020
ER

PT J
AU Gorham, PW
   Lehtinen, NG
   Varner, GS
   Beatty, JJ
   Connolly, A
   Chen, P
   Conde, ME
   Gai, W
   Hast, C
   Hebert, CL
   Miki, C
   Konecny, R
   Kowalski, J
   Ng, J
   Power, JG
   Reil, K
   Ruckman, L
   Saltzberg, D
   Stokes, BT
   Walz, D
AF Gorham, P. W.
   Lehtinen, N. G.
   Varner, G. S.
   Beatty, J. J.
   Connolly, A.
   Chen, P.
   Conde, M. E.
   Gai, W.
   Hast, C.
   Hebert, C. L.
   Miki, C.
   Konecny, R.
   Kowalski, J.
   Ng, J.
   Power, J. G.
   Reil, K.
   Ruckman, L.
   Saltzberg, D.
   Stokes, B. T.
   Walz, D.
TI Observations of microwave continuum emission from air shower plasmas
SO PHYSICAL REVIEW D
LA English
DT Article
ID ENERGY COSMIC-RAYS; RESOLUTION FLYS EYE; ELECTRON THERMALIZATION;
   STIMULATED-EMISSION; GAMMA-RAYS; SPECTRUM; BREMSSTRAHLUNG; SEARCH;
   AMPLIFICATION; RADIATION
AB We investigate a possible new technique for microwave detection of cosmic-ray extensive air showers which relies on detection of expected continuum radiation in the microwave range, caused by free-electron collisions with neutrals in the tenuous plasma left after the passage of the shower. We performed an initial experiment at the Argonne Wakefield Accelerator laboratory in 2003 and measured broadband microwave emission from air ionized via high-energy electrons and photons. A follow-up experiment at the Stanford Linear Accelerator Center in the summer of 2004 confirmed the major features of the previous Argonne Wakefield Accelerator observations with better precision. Prompted by these results we built a prototype detector using satellite television technology and have made measurements suggestive of the detection of cosmic-ray extensive air showers. The method, if confirmed by experiments now in progress, could provide a high-duty cycle complement to current nitrogen fluorescence observations.
C1 [Gorham, P. W.; Lehtinen, N. G.; Varner, G. S.; Hebert, C. L.; Miki, C.; Kowalski, J.; Ruckman, L.; Stokes, B. T.] Univ Hawaii Manoa, Dept Phys & Astron, Honolulu, HI 96822 USA.
   [Beatty, J. J.] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
   [Connolly, A.; Saltzberg, D.] Univ Calif Los Angeles, Dept Phys, Los Angeles, CA 90095 USA.
   [Chen, P.; Hast, C.; Ng, J.; Reil, K.; Walz, D.] Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
   [Conde, M. E.; Gai, W.; Konecny, R.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Gorham, PW (reprint author), Univ Hawaii Manoa, Dept Phys & Astron, Honolulu, HI 96822 USA.
RI Connolly, Amy/J-3958-2013; Beatty, James/D-9310-2011
OI Beatty, James/0000-0003-0481-4952
NR 41
TC 43
Z9 43
U1 1
U2 6
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 AUG
PY 2008
VL 78
IS 3
AR 032007
DI 10.1103/PhysRevD.78.032007
PG 18
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300011
ER

PT J
AU Hall, LJ
   Nomura, Y
AF Hall, Lawrence J.
   Nomura, Yasunori
TI Evidence for the multiverse in the standard model and beyond
SO PHYSICAL REVIEW D
LA English
DT Article
ID DYNAMICAL SYMMETRY-BREAKING; COSMOLOGICAL CONSTANT; UPPER-BOUNDS; HIGGS
   MASS; SUPERSYMMETRY; UNIVERSE; BOSON; UNIFICATION; HIERARCHY; VIOLATION
AB In any theory it is unnatural if the observed values of parameters lie very close to special values that determine the existence of complex structures necessary for observers. A naturalness probability P is introduced to numerically evaluate the degree of unnaturalness. If P is very small in all known theories, corresponding to a high degree of fine-tuning, then there is an observer naturalness problem. In addition to the well-known case of the cosmological constant, we argue that nuclear stability and electroweak symmetry breaking represent significant observer naturalness problems. The naturalness probability associated with nuclear stability depends on the theory of flavor, but for all known theories is conservatively estimated as P(nuc)less than or similar to(10(-3)-10(-2)), and for simple theories of electroweak symmetry breaking P(EWSB)less than or similar to(10(-2)-10(-1)). This pattern of unnaturalness in three different arenas, cosmology, nuclear physics, and electroweak symmetry breaking, provides evidence for the multiverse, since each problem may be easily solved by environmental selection. In the nuclear case the problem is largely solved even if the multiverse distribution for the relevant parameters is relatively flat. With somewhat strongly varying distributions, it is possible to understand both the close proximity to neutron stability and the values of m(e) and m(d)-m(u) in terms of the electromagnetic mass difference between the proton and neutron, delta(EM)similar or equal to 1 +/- 0.5 MeV. It is reasonable that multiverse distributions are strong functions of Lagrangian parameters, since they depend not only on the landscape of vacua, but also on the population mechanism, "integrating out" other parameters, and on a density of observers factor. In any theory with mass scale M that is the origin of electroweak symmetry breaking, strongly varying multiverse distributions typically lead either to a little hierarchy v/M approximate to(10(-2)-10(-1)), or to a large hierarchy v < M. In certain multiverses, where electroweak symmetry breaking occurs only if M is below some critical value, we find that a little hierarchy develops with the value of v(2)/M(2) suppressed by an extra loop factor, as well as by the strength of the distribution. Since the correct theory of electroweak symmetry breaking is unknown, our estimate for P(EWSB) is theoretical. The LHC will lead to a much more robust determination of P(EWSB), and, depending on which theory is indicated by the data, the observer naturalness problem of electroweak symmetry breaking may be removed or strengthened. For each of the three arenas, the discovery of a natural theory would eliminate the evidence for the multiverse; but in the absence of such a theory, the multiverse provides a provisional understanding of the data.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Lawrence Berkeley Natl Lab, Theoret Phys Grp, Berkeley, CA 94720 USA.
RP Hall, LJ (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
OI Nomura, Yasunori/0000-0002-1497-1479
FU U. S. Department of Energy [DE-AC02-05CH11231]; National Science
   Foundation [PHY-0457315, PHY-0555661]; DOE OJI; Alfred P. Sloan
   Foundation
FX We thank Jesse Thaler for useful conversations. This work was supported
   in part by the Director, Office of Science, Office of High Energy and
   Nuclear Physics, of the U. S. Department of Energy under Contract No.
   DE-AC02-05CH11231, and in part by the National Science Foundation under
   Grant No. PHY-0457315. The work of Y.N. was also supported by the
   National Science Foundation under Grant No. PHY-0555661, by a DOE OJI,
   and by the Alfred P. Sloan Foundation.
NR 58
TC 37
Z9 37
U1 2
U2 6
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 AUG
PY 2008
VL 78
IS 3
AR 035001
DI 10.1103/PhysRevD.78.035001
PG 42
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300083
ER

PT J
AU Hirata, CM
   Ho, S
   Padmanabhan, N
   Seljak, U
   Bahcall, NA
AF Hirata, Christopher M.
   Ho, Shirley
   Padmanabhan, Nikhil
   Seljak, Uros
   Bahcall, Neta A.
TI Correlation of CMB with large-scale structure. II. Weak lensing
SO PHYSICAL REVIEW D
LA English
DT Review
ID DIGITAL SKY SURVEY; MICROWAVE-ANISOTROPY-PROBE; INTEGRATED SACHS-WOLFE;
   SPECTROSCOPIC TARGET SELECTION; DARK ENERGY CONSTRAINTS;
   HUBBLE-SPACE-TELESCOPE; FLUX-LIMITED SAMPLE; DATA RELEASE;
   CROSS-CORRELATION; WMAP OBSERVATIONS
AB We investigate the cot-relation of gravitational lensing of the cosmic microwave background (CMB) with several tracers of large-scale structure, including luminous red galaxies (LRGs), quasars, and radio Sources. The lensing field is reconstructed based on the CMB maps from the Wilkinson Microwave Anisotropy Probe (WMAP) satellite; the LRGs and quasars are observed by the Sloan Digital Sky Survey (SDSS); and the radio sources are observed in the NRAO VLA Sky Survey (NVSS). Combining all three large-scale Structure samples, we find evidence for a positive cross correlation at the 2.5 sigma level (1.8 sigma for the SDSS samples and 2.1 sigma for NVSS); the cross correlation amplitude is 1.06 +/- 0.42 times that expected for the WMAP cosmological parameters. Our analysis extends other recent analyses in that we carefully determine bias-weighted redshift distribution of the Sources. which is needed for a meaningful cosmological interpretation of the detected signal. We investigate contamination of the signal by galactic emission, extragalactic radio and infrared sources, thermal and kinetic Sunyaev-Zel'dovich effects, and the Rees-Sciama effect, and find all of them to be negligible.
C1 [Hirata, Christopher M.] CALTECH, Pasadena, CA 91125 USA.
   [Ho, Shirley; Bahcall, Neta A.] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
   [Padmanabhan, Nikhil] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [Seljak, Uros] Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland.
   [Seljak, Uros] Abdus Salaam Int Ctr Theoret Phys, I-34014 Trieste, Italy.
   [Seljak, Uros] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RP Hirata, CM (reprint author), CALTECH, M-C 130-33, Pasadena, CA 91125 USA.
EM chirata@tapir.caltech.edu
RI Padmanabhan, Nikhil/A-2094-2012
FU Alfred P. Sloan Foundation; National Science Foundation; U.S. Department
   of Energy; National Aeronautics and Space Administration; Japanese
   Monbukagakusho; Max Planck Society; Higher Education Funding Council for
   England; NASA Office of Space Science; Space Telescope Science Institute
   [NAS 526555]; U.S. Department of Energy [DE-AC02-05CH11231]; Packard
   Foundation; NSF [CAREER-0132953]
FX We thank Sudeep Das, Doug Finkbeiner, Jim Gunn, Beth Reid, Kendrick
   Smith, David Spergel, and Oliver Zahn for useful discussions. Funding
   for the SDSS and SDSS-II has been provided by the Alfred P. Sloan
   Foundation, the participating institutions, the National Science
   Foundation, the U.S. Department of Energy, the National Aeronautics and
   Space Administration, the Japanese Monbukagakusho, the Max Planck
   Society, and the Higher Education Funding Council for England. The SDSS
   website is http://www.sdss.org/. The SDSS is managed by the
   Astrophysical Research Consortium for the participating institutions.
   The participating institutions are the American Museum of Natural
   History, Astrophysical Institute Potsdam, the University of Basel, the
   University of Cambridge, Case Western Reserve University, the University
   of Chicago, Drexel University, Fermilab, the Institute for Advanced
   Study, the Japan Participation Group,. Johns Hopkins University, the
   Joint Institute for Nuclear Astrophysics, the Kavli Institute for
   Particle Astrophysics and Cosmology, the Korean Scientist Group, the
   Chinese Academy of Sciences (LAMOST), Los Alamos National Laboratory,
   the Max-Planck-Institute for Astronomy (MPIA), the Max-Planck-Institute
   for Astrophysics (MPA), New Mexico State University, Ohio State
   University, the University of Pittsburgh, the University of Portsmouth,
   Princeton University, the United States Naval Observatory, and the
   University of Washington. The 2dF QSO Redshift Survey (2QZ) was compiled
   by the 2QZ survey team from observations made with the two-degree field
   on the Anglo-Australian Telescope. The 2dF-SDSS LRG and QSO (2SLAQ)
   Survey was compiled by the 2SLAQ team from SDSS data and observations
   made with the two-degree field on the Anglo-Australian Telescope. This
   publication makes use of data products from the Two Micron All Sky
   Survey, which is a joint project of the University of Massachusetts and
   the Infrared Processing and Analysis Center/California Institute of
   Technology, funded by the National Aeronautics and Space Administration
   and the National Science Foundation. We acknowledge the use of the
   Legacy Archive for Microwave Background Data Analysis (LAMBDA). Support
   for LAMBDA is provided by the NASA Office of Space Science. Some of the
   results in this paper have been derived using the HEALPix [40] package.
   N.P. is supported by the Space Telescope Science Institute, which is
   operated by the Association of Universities for Research in Astronomy,
   Inc., for NASA, under Contract No. NAS 526555. Part of this work was
   supported by the Director, Office of Science, of the U.S. Department of
   Energy under Contract No. DE-AC02-05CH11231. U. S. is supported by the
   Packard Foundation and NSF CAREER-0132953.
NR 111
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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 AUG
PY 2008
VL 78
IS 4
AR 043520
DI 10.1103/PhysRevD.78.043520
PG 33
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 350QP
UT WOS:000259368500032
ER

PT J
AU Ho, S
   Hirata, C
   Padmanabhan, N
   Seljak, U
   Bahcall, N
AF Ho, Shirley
   Hirata, Christopher
   Padmanabhan, Nikhil
   Seljak, Uros
   Bahcall, Neta
TI Correlation of CMB with large-scale structure. I. Integrated Sachs-Wolfe
   tomography and cosmological implications
SO PHYSICAL REVIEW D
LA English
DT Article
ID SLOAN-DIGITAL-SKY; MICROWAVE BACKGROUND-RADIATION; SPECTROSCOPIC TARGET
   SELECTION; PROBE WMAP OBSERVATIONS; LUMINOUS RED GALAXIES; QSO REDSHIFT
   SURVEY; DARK ENERGY CONSTRAINTS; SURVEY IMAGING DATA; DATA RELEASE;
   CROSS-CORRELATION
AB We cross correlate large-scale structure (LSS) observations from a number of surveys with cosmic microwave background (CMB) anisotropies from the Wilkinson Microwave Anisotropy Probe (WMAP) to investigate the integrated Sachs-Wolfe (ISW) effect as a function of redshift, covering z similar to 0.1-2.5. Our main goal is to go beyond reporting detections towards developing a reliable likelihood analysis that allows one to determine cosmological constraints from ISW observations. With this in mind we spend a considerable amount of effort in determining the redshift-dependent bias and redshift distribution (6(z) X dN/dz) of these samples by matching with spectroscopic observations where available, and analyzing autopower spectra and cross-power spectra between the samples. Because of wide redshift distributions of some of the data sets we do not assume a constant-bias model, in contrast to previous work on this subject. We only use the LSS data sets for which we can extract such information reliably and as a result the data sets we use are 2-Micron All Sky Survey (2MASS) samples, Sloan Digital Sky Survey (SDSS) photometric Luminous Red Galaxies, SDSS photometric quasars, and NRAO VLA Sky Survey (NVSS) radio sources. We make a joint analysis of all samples constructing a full covariance matrix, which we subsequently use for cosmological parameter fitting. We report a 3.7 sigma detection of ISW combining all the data sets. We do not find significant evidence for an ISW signal at z > 1, in agreement with theoretical expectation in the Lambda CDM model. We combine the ISW likelihood function with weak lensing of CMB (hereafter Paper II [C. M. Hirata, S. Ho, N. Padmanabhan, U. Seljak, and N. A. Bahcall, arXiv: 0801.0644.]) and CMB power spectrum to constrain the equation of state of dark energy and the curvature of the Universe. While ISW does not significantly improve the constraints in the simplest six-parameter flat Lambda CDM model, it improves constraints on seven-parameter models with curvature by a factor of 3.2 (relative to WMAP alone) to Omega(K) = -0.004(-0.020)(+0.014), and with dark energy equation of state by 15% to w = -1.01(-0.40)(+0.30) [posterior median with "1 sigma" (16th-84th percentile) range]. A software package for calculating the ISW likelihood function can be downloaded at http://www.astro.princeton.edu/--shirley/ISWWL.html.
C1 [Ho, Shirley; Bahcall, Neta] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
   [Hirata, Christopher] CALTECH, Pasadena, CA 91125 USA.
   [Padmanabhan, Nikhil] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [Seljak, Uros] Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland.
   [Seljak, Uros] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94704 USA.
RP Ho, S (reprint author), Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
EM shirley@astro.princeton.edu
RI Padmanabhan, Nikhil/A-2094-2012
FU Space Telescope Science Institute [NAS 5-26555]; U.S. Department of
   Energy [DE-AC02-05CH11231]; Packard Foundation; NSF [CAREER-0132953];
   Alfred P Sloan Foundation; National Science Foundation; National
   Aeronautics and Space Administration; Japanese Monbukagakusho; Max
   Planck Society; Higher Education Funding Council for England
FX We would like to thank Joanna Dunkley for her extensive help on the
   discussion of chain convergences, and Lucas Lombriser and Anze Slosar
   for bringing an error in an earlier version of this paper to our
   attention. We would also like to thank David Spergel, Kendrick Smith,
   and Jim Gunn for helpful conversations. N. P. is supported by the Space
   Telescope Science Institute, which is operated by the Association of
   Universities for Research in Astronomy, Inc., for NASA, under Contract
   No. NAS 5-26555. Part of this work was supported by the Director, Office
   of Science, of the U.S. Department of Energy under Contract No.
   DE-AC02-05CH11231. U.S. is supported by the Packard Foundation and NSF
   CAREER-0132953. Funding for the SDSS and SDSS-II has been provided by
   the Alfred P Sloan Foundation, the participating institutions, the
   National Science Foundation, the U.S. Department of Energy, the National
   Aeronautics and Space Administration, the Japanese Monbukagakusho, the
   Max Planck Society, and the Higher Education Funding Council for
   England. The SDSS website is http://www.sdss.org/. The SDSS is managed
   by the Astrophysical Research Consortium for the participating
   institutions. The participating institutions are the American Museum of
   Natural History, Astrophysical Institute Potsdam, the university of
   Basel, the Unversity of Cambridge, Case Western Reserve University, the
   University of Chicago, Drexel University, Fermilab, the Institute for
   Advanced Study, the Japan Participation Group, Johns Hopkins University,
   the Joint Institute for Nuclear Astrophysics, the Kavli Institute for
   Particle Astrophysics and Cosmology, the Korean Scientist Group, the
   Chinese Academy of Sciences (LAMOST), Los Alamos National Laboratory,
   the Max-Planck-Institute for Astronomy (MPIA), the Max-Planck-Institute
   for Astrophysics (MPA), New Mexico State University, Ohio State
   Unversity, the University of Posrtsmouth, Princeton University, the
   United States Naval Observatory, and the University of Washington. The
   2dF QSO Redshift Survery (2QZ) was compiled by the 2QZ survey team from
   observations made with the two-degree field on the Anglo-Australian
   Telescope. The 2dF-SDSS LRG and QSO (2SLAQ) Survey was compiled by the
   2SLAQ team from SDSS data and observations made with the two-degree
   field on the Anglo-Australian Telescope. This publication makes use of
   data products from the Two Micron All Sky Survery, which is a joint
   project of the University of Massachusetts and the Infrared Processing
   the Analysis Center/California Institute of Technology, funded by the
   National Aeronautics and Space Administration and the National Science
   Foundation.
NR 94
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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 AUG
PY 2008
VL 78
IS 4
AR 043519
DI 10.1103/PhysRevD.78.043519
PG 35
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 350QP
UT WOS:000259368500031
ER

PT J
AU Nakamura, Y
   Aoki, S
   Taniguchi, Y
   Yoshie, T
AF Nakamura, Yousuke
   Aoki, Sinya
   Taniguchi, Yusuke
   Yoshie, Tomoteru
TI Precise determination of B-K and light quark masses in quenched
   domain-wall QCD
SO PHYSICAL REVIEW D
LA English
DT Article
ID WEAK MATRIX-ELEMENTS; LATTICE QCD; NONPERTURBATIVE DETERMINATION; AXIAL
   CURRENT; RENORMALIZATION; REGULARIZATION; IMPROVEMENT; PARAMETER;
   SYMMETRY; FERMIONS
AB We calculate nonperturbative renormalization factors at hadronic scale for Delta S 2 four-quark operators in quenched domain-wall QCD using the Schrodinger functional method. Combining them with the nonperturbative renormalization group running by the Alpha Collaboration, our result yields the fully nonperturbative renormalization factor, which converts the lattice bare B-K to the renormalization group invariant (RGI) (B) over cap (K). Applying this to the bare B-K previously obtained by the CP-PACS Collaboration at a(-1) similar or equal to 2; 3; 4 GeV, we obtain (B) over cap (K) = 0.782(5)(7) [equivalent to B-K((MS)over bar) (NDR, 2 GeV) = 0.565(4)(5) by two-loop running] in the continuum limit, where the first error is statistical and the second is systematic due to the continuum extrapolation. Except the quenching error, the total error we have achieved is less than 2%, which is much smaller than the previous ones. Taking the same procedure, we obtain m(u,d)(RGI) = 5.613(66) MeV and m(s)(RGI) 147.1(17) MeV [equivalent to m(u,d)((MS) over) (bar)(2 GeV) = 4.026(48) MeV and m(s)((MS)) (over bar)(2 GeV) = 105.6(12) MeV by four-loop running] in the continuum limit.
C1 [Nakamura, Yousuke; Aoki, Sinya; Taniguchi, Yusuke; Yoshie, Tomoteru] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan.
   [Aoki, Sinya] Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA.
   [Taniguchi, Yusuke; Yoshie, Tomoteru] Univ Tsukuba, Ctr Computat Phys, Tsukuba, Ibaraki 3058577, Japan.
RP Nakamura, Y (reprint author), Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan.
NR 43
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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 AUG
PY 2008
VL 78
IS 3
AR 034502
DI 10.1103/PhysRevD.78.034502
PG 29
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300077
ER

PT J
AU Schmidt, F
   Vallinotto, A
   Sefusatti, E
   Dodelson, S
AF Schmidt, Fabian
   Vallinotto, Alberto
   Sefusatti, Emiliano
   Dodelson, Scott
TI Weak lensing effects on the galaxy three-point correlation function
SO PHYSICAL REVIEW D
LA English
DT Article
ID LARGE-SCALE STRUCTURE; DIGITAL SKY SURVEY; GAUSSIAN INITIAL CONDITIONS;
   PRIMORDIAL NON-GAUSSIANITY; PROBE WMAP OBSERVATIONS; LUMINOUS RED
   GALAXIES; REDSHIFT SURVEY; POWER-SPECTRUM; SDSS; BISPECTRUM
AB We study the corrections to the galaxy three-point correlation function induced by weak lensing magnification clue to the matter distribution along the line of sight. We consistently derive all the correction terms arising up to second order in perturbation theory and provide analytic expressions as well as order-of-magnitude estimates for their relative importance. The magnification contributions depend on the geometry of the projected triangle on the sky plane and scale with different powers of the number count slope and redshift of the galaxy sample considered. We evaluate all terms numerically and show that, depending on the triangle configuration as well as the galaxy sample considered, weak lensing can in general significantly contribute to and alter the three-point correlation function observed through galaxy and quasar catalogs.
C1 [Schmidt, Fabian; Dodelson, Scott] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
   [Schmidt, Fabian; Dodelson, Scott] Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
   [Vallinotto, Alberto] Univ Paris 06, UMR 7095, CNRS, Inst Astrophys Paris, F-75014 Paris, France.
   [Sefusatti, Emiliano; Dodelson, Scott] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
RP Schmidt, F (reprint author), Univ Chicago, Dept Astron & Astrophys, 5640 S Ellis Ave, Chicago, IL 60637 USA.
OI Schmidt, Fabian/0000-0002-6807-7464; Sefusatti,
   Emiliano/0000-0003-0473-1567
NR 60
TC 6
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U1 1
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 AUG
PY 2008
VL 78
IS 4
AR 043513
DI 10.1103/PhysRevD.78.043513
PG 21
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 350QP
UT WOS:000259368500025
ER

PT J
AU Sullivan, Z
   Berger, EL
AF Sullivan, Zack
   Berger, Edmond L.
TI Trilepton production at the CERN LHC: Standard model sources and beyond
SO PHYSICAL REVIEW D
LA English
DT Article
ID FERMILAB TEVATRON COLLIDER; CHARGINO-NEUTRALINO PRODUCTION; LARGE HADRON
   COLLIDER; MINIMAL SUPERGRAVITY; MULTILEPTON SIGNALS; PBARP COLLIDERS;
   SUPERSYMMETRY; DECAYS; GAUGINOS; PHYSICS
AB Events with three or more isolated leptons in the final state are known to be signatures of new physics phenomena at high energy collider physics facilities. Standard model sources of isolated trilepton final states include gauge boson pair production such as WZ and W gamma*, and t (t) over bar production. We demonstrate that leptons from heavy flavor decays, such as b -> lX and c -> lX, provide sources of trileptons that can be orders of magnitude larger after cuts than other standard model backgrounds to new physics processes. We explain the physical reason heavy flavor backgrounds survive isolation cuts. We propose new cuts to control the backgrounds in the specific case of chargino plus neutralino pair production in supersymmetric models. After these cuts are imposed, we show that it should be possible to find at least a 4 sigma excess for supersymmetry parameter space point LM9 with 30 fb(-1) of integrated luminosity.
C1 [Sullivan, Zack] So Methodist Univ, Dallas, TX 75275 USA.
   [Sullivan, Zack; Berger, Edmond L.] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA.
RP Sullivan, Z (reprint author), So Methodist Univ, Dallas, TX 75275 USA.
NR 61
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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 AUG
PY 2008
VL 78
IS 3
AR 034030
DI 10.1103/PhysRevD.78.034030
PG 15
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300064
ER

PT J
AU Velytsky, A
AF Velytsky, Alexander
TI Equilibrium criterion and effective spin models for finite temperature
   gauge theories
SO PHYSICAL REVIEW D
LA English
DT Article
ID CARLO RENORMALIZATION-GROUP; CONFINEMENT; QCD
AB Using the example of the SU(2) gauge theory in 3+1 dimensions we consider the construction of a 3-dimensional effective model in terms of Polyakov loops. We demonstrate the application of an equilibrium self-consistency condition to the systematic analysis of the contribution of various [global Z(2) symmetric] terms in the effective model action. We apply this analysis to the construction of a simple effective action with the minimum necessary number of operators. Such an action is shown to be capable of reproducing relevant observables, e.g. the Polyakov loop ensemble average, within the desired accuracy.
C1 [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 Velytsky, A (reprint author), Univ Chicago, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA.
EM vel@theory.uchicago.edu
FU U. S. Department of Energy, Division of High Energy Physics and Office
   of Nuclear Physics [DE-AC02-06CH11357]; Joint Theory Institute
FX The author would like to thank T. Tomboulis for insightful discussions.
   The computations were performed on the cluster maintained by Academic
   Technology Services (UCLA). This work is supported 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, and in part under
   a Joint Theory Institute grant.
NR 15
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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 AUG
PY 2008
VL 78
IS 3
AR 034505
DI 10.1103/PhysRevD.78.034505
PG 6
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 345DD
UT WOS:000258975300080
ER

PT J
AU Determan, MD
   Guo, L
   Lo, CT
   Thiyagarajan, P
   Mallapragada, SK
AF Determan, Michael D.
   Guo, Liang
   Lo, Chieh-Tsung
   Thiyagarajan, P.
   Mallapragada, Surya K.
TI pH- and temperature-dependent phase behavior of a PEO-PPO-PEO-based
   pentablock copolymer in aqueous media
SO PHYSICAL REVIEW E
LA English
DT Article
ID AMPHIPHILIC BLOCK-COPOLYMERS; RAFT POLYMERIZATION; WATER; MICELLES;
   SCATTERING; DIBLOCK
AB We investigated the structural features of micelles formed by the self-association of the pentablock copolymer poly[N,N-(diethyl amino)ethyl methacrylate]-block-poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethyleneoxide)-block-poly[N,N-(diethylamino)ethyl methacrylate] (PDEAEM-PEO-PPO-PEO-PDEAEM) in aqueous solutions by using small-angle neutron scattering SANS. The pentablock copolymer solutions exhibit micellar and get phases in response to changes in both the temperature and pH by virtue of (1) the lower critical solution temperature of the PPO blocks and (2) the polyelectrolyte character of the pendant PDEAEM blocks. Two modeling schemes were employed to describe the SANS data of semidilute copolymer solutions at higher temperature as they contain interacting charged micelles at pH < 7.5 and interacting neutral micelles at higher pH. We have elucidated the structures of the micelles in terms of size, shape, polydispersity, association number, number density, and surface charge. At low pH the charged spherical micelles are less packed with the copolymers presumably due to the electrostatic repulsion between the charged pendant groups. On the other hand, at higher pH the hydrophobic character of the neutral pendant groups enable them to sequester within the micelle core along with the PPO, thus increasing the number density and the core size of the spherical micelles. At higher copolymer concentration reversible thermoresponsive sol-gel transitions were observed at all pH conditions and the theological behavior of the gels nicely correlates with different organization of micelles with different shapes.
C1 [Determan, Michael D.; Mallapragada, Surya K.] Iowa State Univ, Dept Chem & Biol Engn, Ames, IA 50011 USA.
   [Lo, Chieh-Tsung] Natl Cheng Kung Univ, Dept Chem Engn, Tainan 701, Taiwan.
   [Guo, Liang] Argonne Natl Lab, BioCAT, Chicago, IL 60439 USA.
   [Guo, Liang] IIT, Chicago, IL 60439 USA.
   [Determan, Michael D.; Mallapragada, Surya K.] Ames Lab, Ames, IA 50011 USA.
RP Determan, MD (reprint author), Iowa State Univ, Dept Chem & Biol Engn, 144 Spedding Hall, Ames, IA 50011 USA.
EM thiyaga@anl.gov
RI Mallapragada, Surya/F-9375-2012
FU U.S. DOE, BES [DE-AC02-06CH11357]; Iowa State University
   [DE-AC02-07CH11358]
FX This work benefited from the use of the IPNS and APS, funded by the U.S.
   DOE, BES, under Contract No. DE-AC02-06CH11357 to the University of
   Chicago Argonne, LLC. Ames Laboratory is operated for the U.S.
   Department of Energy by Iowa State University under Contract No
   DE-AC02-07CH11358.
NR 26
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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 AUG
PY 2008
VL 78
IS 2
AR 021802
DI 10.1103/PhysRevE.78.021802
PN 1
PG 9
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 349EH
UT WOS:000259263600088
PM 18850858
ER

PT J
AU Glosli, JN
   Graziani, FR
   More, RM
   Murillo, MS
   Streitz, FH
   Surh, MP
   Benedict, LX
   Hau-Riege, S
   Langdon, AB
   London, RA
AF Glosli, J. N.
   Graziani, F. R.
   More, R. M.
   Murillo, M. S.
   Streitz, F. H.
   Surh, M. P.
   Benedict, L. X.
   Hau-Riege, S.
   Langdon, A. B.
   London, R. A.
TI Molecular dynamics simulations of temperature equilibration in dense
   hydrogen
SO PHYSICAL REVIEW E
LA English
DT Article
ID STRONGLY COUPLED PLASMA; THERMAL EQUILIBRATION; KINETIC EQUATION;
   RELAXATION; SYSTEMS
AB The temperature equilibration rate between electrons and protons in dense hydrogen has been calculated with molecular dynamics simulations for temperatures between 10 and 600 eV and densities between 1020 cm(-3) to 10(24) cm(-3). Careful attention has been devoted to convergence of the simulations, including the role of semiclassical potentials. We find that for Coulomb logarithms L >= 1, a model by Gericke-Murillo-Schlanges (GMS) [D. O. Gericke et al., Phys. Rev. E 65, 036418 (2002)] based on a T-matrix method and the approach by Brown-Preston-Singleton [L. S. Brown et al., Phys. Rep. 410, 237 (2005)] agrees with the simulation data to within the error bars of the simulation. For smaller Coulomb logarithms, the GMS model is consistent with the simulation results. Landau-Spitzer models are consistent with the simulation data for L >= 4.
C1 [Glosli, J. N.; Graziani, F. R.; More, R. M.; Streitz, F. H.; Surh, M. P.; Benedict, L. X.; Hau-Riege, S.; Langdon, A. B.; London, R. A.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   [Murillo, M. S.] Los Alamos Natl Lab, Div Phys, MS D410, Los Alamos, NM 87545 USA.
RP Glosli, JN (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
   [DE-AC52-07NA27344]; Laboratory Directed Research and Development
   Program at LLNL [07-ERD-044]
FX This work performed under the auspices of the U.S. Department of Energy
   by Lawrence Livermore National Laboratory under Contract No.
   DE-AC52-07NA27344. This work was funded by the Laboratory Directed
   Research and Development Program at LLNL under project tracking code No.
   07-ERD-044.
NR 23
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U2 14
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 AUG
PY 2008
VL 78
IS 2
AR 025401
DI 10.1103/PhysRevE.78.025401
PN 2
PG 4
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 349EI
UT WOS:000259263700011
PM 18850889
ER

PT J
AU Quan, HT
   Yang, S
   Sun, CP
AF Quan, H. T.
   Yang, S.
   Sun, C. P.
TI Microscopic work distribution of small systems in quantum isothermal
   processes and the minimal work principle
SO PHYSICAL REVIEW E
LA English
DT Article
ID FREE-ENERGY DIFFERENCES; NONEQUILIBRIUM MEASUREMENTS
AB For a two-level quantum mechanical system, we derive microscopically the exact expression for the fluctuation of microscopic work in. a multistep nonequilibrium process, and we rigorously prove that in an isothermal process, the fluctuation is vanishingly small and the most probabilistic work is just equal to the difference of the free energy. Our study demonstrates that the convergence of the microscopic work in the isothermal process is due to the nature of the isothermal process rather than the usual thermodynamic limit condition. Our investigation justifies the validity of a "minimum work principle" formulation of the second law even for a small system far from the thermodynamic limit.
C1 [Quan, H. T.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   [Yang, S.; Sun, C. P.] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
RP Quan, HT (reprint author), Los Alamos Natl Lab, Div Theoret, MS B213, Los Alamos, NM 87545 USA.
RI Sun, Chang-Pu/C-2344-2009; Yang, Shuo/D-1372-2011; Quan,
   Haitao/G-8521-2012
OI Yang, Shuo/0000-0001-9733-8566; Quan, Haitao/0000-0002-4130-2924
FU U.S. Department of Energy; NSFC [90203018, 10474104, 60433050,
   10704023]; NFRPC [2006CB921205, 2005CB724508]
FX The authors thank an anonymous referee for pointing out a mistake in our
   previous version of the manuscript. H.T.Q. thanks Rishi Sharma for
   stimulating discussions and gratefully acknowledges the support of the
   U.S. Department of Energy through the LANL/LDRD Program for this work;
   C.P.S. is supported by NSFC through Grants No. 90203018, No. 10474104,
   No. 60433050, and No. 10704023, and NFRPC through Grants No.
   2006CB921205 and No. 2005CB724508.
NR 23
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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 AUG
PY 2008
VL 78
IS 2
AR 021116
DI 10.1103/PhysRevE.78.021116
PN 1
PG 6
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 349EH
UT WOS:000259263600025
PM 18850795
ER

PT J
AU Thiele, R
   Bornath, T
   Fortmann, C
   Holl, A
   Redmer, R
   Reinholz, H
   Ropke, G
   Wierling, A
   Glenzer, SH
   Gregori, G
AF Thiele, R.
   Bornath, T.
   Fortmann, C.
   Hoell, A.
   Redmer, R.
   Reinholz, H.
   Roepke, G.
   Wierling, A.
   Glenzer, S. H.
   Gregori, G.
TI Plasmon resonance in warm dense matter
SO PHYSICAL REVIEW E
LA English
DT Article
ID X-RAY-SCATTERING; RELAXATION-TIME APPROXIMATION; LINDHARD DIELECTRIC
   FUNCTION; THOMSON SCATTERING; 2-COMPONENT PLASMA; LASER
AB Collective Thomson scattering with extreme ultraviolet light or x rays is shown to allow for a robust measurement of the free electron density in dense plasmas. Collective excitations like plasmons appear as maxima in the scattering signal. Their frequency position can directly be related to the free electron density. The range of applicability of the standard Gross-Bohm dispersion relation and of an improved dispersion relation in comparison to calculations based on the dielectric function in random phase approximation is investigated. More important, this well-established treatment of Thomson scattering on free electrons is generalized in the Born-Mermin approximation by including collisions. We show that, in the transition region from collective to noncollective scattering, the consideration of collisions is important.
C1 [Thiele, R.; Bornath, T.; Fortmann, C.; Hoell, A.; Redmer, R.; Reinholz, H.; Roepke, G.; Wierling, A.] Univ Rostock, Inst Phys, D-18051 Rostock, Germany.
   [Glenzer, S. H.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
   [Gregori, G.] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England.
   [Gregori, G.] Rutherford Appleton Lab, CLF, Didcot OX11 0QX, Oxon, England.
RP Thiele, R (reprint author), Univ Rostock, Inst Phys, D-18051 Rostock, Germany.
EM robert.thiele@uni-rostock.de
RI Redmer, Ronald/F-3046-2013; 
OI Bornath, Thomas/0000-0003-2831-2586; Thiele, Robert/0000-0001-8350-9942
NR 37
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U2 6
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 AUG
PY 2008
VL 78
IS 2
AR 026411
DI 10.1103/PhysRevE.78.026411
PN 2
PG 8
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 349EI
UT WOS:000259263700072
PM 18850950
ER

PT J
AU Wang, G
   Blaskiewicz, M
AF Wang, Gang
   Blaskiewicz, Michael
TI Dynamics of ion shielding in an anisotropic electron plasma
SO PHYSICAL REVIEW E
LA English
DT Article
ID TEST PARTICLES; DEBYE
AB We show that, for a test ion moving in a collisionless single-species electron plasma, exact analytical solutions can be obtained for certain anisotropic velocity distributions of the electron plasma. By comparing the analytical formula with the numerical results calculated for the more realistic Maxwellian plasma, we demonstrate that plasmas with three different velocity distributions behave similarly for ions moving with velocity smaller than the velocity spread of the electrons. Furthermore, we show that the response of the electron density to a rest ion decays exponentially with distance, provided the anisotropic velocity distribution exhibits elliptical symmetry.
C1 [Wang, Gang; Blaskiewicz, Michael] Brookhaven Natl Lab, Upton, NY 11973 USA.
   [Wang, Gang] SUNY Stony Brook, Dept Phys, Stony Brook, NY 11794 USA.
RP Wang, G (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM gawang@bnl.gov
NR 11
TC 7
Z9 7
U1 0
U2 0
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 AUG
PY 2008
VL 78
IS 2
AR 026413
DI 10.1103/PhysRevE.78.026413
PN 2
PG 9
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 349EI
UT WOS:000259263700074
PM 18850952
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
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   Anderson, S
   Andrieu, B
   Anzelc, MS
   Aoki, M
   Arnoud, Y
   Arov, M
   Arthaud, M
   Askew, A
   Sman, BAO
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   Badaud, F
   Baden, A
   Bagby, L
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   Beale, S
   Bean, A
   Begalli, M
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   Bellantoni, L
   Bellavance, A
   Benitez, JA
   Beri, SB
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   Demarteau, M
   Demina, R
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   Diehl, HT
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   Dong, H
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   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
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   Ginther, G
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   Grenier, G
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   Haley, J
   Hall, I
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   Harder, K
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   Harrington, R
   Hauptman, JM
   Hauser, R
   Hays, J
   Hebbeker, T
   Hedin, D
   Hegeman, JG
   Heinmiller, JM
   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
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   Iashvili, I
   Illingworth, R
   Ito, AS
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   Oshima, N
   Osman, N
   Osta, J
   Otec, R
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   Pangilinan, M
   Parashar, N
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   Gavrilov, V.
   Gay, P.
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   Ginther, G.
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   Greenwood, Z. D.
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   Hall, R. E.
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   Harel, A.
   Harrington, R.
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   Hebbeker, T.
   Hedin, D.
   Hegeman, J. G.
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   Heinson, A. P.
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   Hensel, C.
   Herner, K.
   Hesketh, G.
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   Hobbs, J. D.
   Hoeneisen, B.
   Hoeth, H.
   Hohlfeld, M.
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   Hossain, S.
   Houben, P.
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   Hubacek, Z.
   Hynek, V.
   Iashvili, I.
   Illingworth, R.
   Ito, A. S.
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   Jaffre, M.
   Jain, S.
   Jakobs, K.
   Jarvis, C.
   Jesik, R.
   Johns, K.
   Johnson, C.
   Johnson, M.
   Jonckheere, A.
   Jonsson, P.
   Juste, A.
   Kajfasz, E.
   Kalinin, A. M.
   Kalk, J. M.
   Kappler, S.
   Karmanov, D.
   Kasper, P. A.
   Katsanos, I.
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   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.
   Korablev, V. M.
   Kozelov, A. V.
   Kraus, J.
   Krop, D.
   Kuhl, T.
   Kumar, A.
   Kupco, A.
   Kurca, T.
   Kvita, J.
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   Lam, D.
   Lammers, S.
   Landsberg, G.
   Lebrun, P.
   Lee, W. M.
   Leflat, A.
   Lellouch, J.
   Leveque, J.
   Li, J.
   Li, L.
   Li, Q. Z.
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   Lima, J. G. R.
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   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.
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   Madaras, R. J.
   Ttig, P. Ma R.
   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.
   Molina, J.
   Mommsen, R. K.
   Mondal, N. K.
   Moore, R. W.
   Moulik, T.
   Muanza, G. S.
   Mulders, M.
   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.
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   Potter, C.
   da Silva, W. L. Prado
   Prosper, H. B.
   Protopopescu, S.
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   Schamberger, R. D.
   Scheglov, Y.
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   Snow, J.
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   Tokmenin, V. V.
   Toole, T.
   Torchiani, I.
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   Tuts, P. M.
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   Vachon, B.
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   Van Kooten, R.
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   Varelas, N.
   Varnes, E. W.
   Vasilyev, I. A.
   Vaupel, M.
   Verdier, P.
   Vertogradov, L. S.
   Verzocchi, M.
   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.
   Yan, M.
   Yasuda, T.
   Yatsunenko, Y. A.
   Yip, K.
   Yoo, H. D.
   Youn, S. W.
   Yu, J.
   Zatserklyaniy, A.
   Zeitnitz, C.
   Zhao, T.
   Zhou, B.
   Zhu, J.
   Zielinski, M.
   Zieminska, D.
   Zieminski, A.
   Zivkovic, L.
   Zutshi, V.
   Zverev, E. G.
CA D0 Collaboration
TI Search for decay of a fermiophobic Higgs boson h(f) -> gamma gamma with
   the D0 detector at root s=1.96 TeV
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ELECTROWEAK SYMMETRY-BREAKING; EXTRA DIMENSIONS; HADRON COLLIDERS;
   STANDARD MODEL; PAIRS
AB We report the results of a search for a narrow resonance decaying into two photons in 1.1 fb(-1) of data collected by the D0 experiment at the Fermilab Tevatron Collider during the period 2002-2006. We find no evidence for such a resonance and set a lower limit on the mass of a fermiophobic Higgs boson of m(hf) > 100 GeV at the 95% C.L. This exclusion limit exceeds those obtained in previous searches at the Fermilab Tevatron and covers a significant region of the parameter space B(h(f) -> gamma gamma) vs m(hf) which was not accessible at the CERN Large Electron-Positron Collider.
C1 [Abazov, V. M.; Alexeev, G. D.; Kalinin, A. M.; 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.; Molina, J.; Mundim, L.; Nogima, H.; da Silva, W. L. Prado; Rodrigues, R. F.; Sanchez-Hernandez, A.; 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.; Chan, K.; Coadou, Y.; 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.; Chan, K.; Coadou, Y.; 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.; Chan, K.; Coadou, Y.; 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.; Chan, K.; Coadou, Y.; Gillberg, D.; Liu, Z.; Moore, R. W.; O'Neil, D. C.; Potter, C.; Taylor, W.; Vachon, B.] McGill Univ, Montreal, PQ, Canada.
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   Univ San Francisco, Quito, Ecuador.
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   [Harder, K.; Mommsen, R. K.; Owen, M.; Peters, K.; Rich, P.; Schwanenberger, C.; Soeldner-Rembold, S.; Wyatt, T. R.] Univ Manchester, Manchester, Lancs, England.
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   [Andeen, T.; Anzelc, M. S.; Buchholz, D.; Kirby, M. H.; Schellman, H.; Strom, D.; Yacoob, S.; Youn, S. W.] Northwestern Univ, Evanston, IL 60208 USA.
   [Evans, H.; Krop, D.; Parua, N.; Rieger, J.; Van Kooten, R.; Welty-Rieger, L.; Zieminska, D.; Zieminski, A.] Indiana Univ, Bloomington, IN 47405 USA.
   [Chan, K. M.; Lam, D.; Osta, J.; Pogorelov, Y.; Ruchti, R.; Smirnov, D.; Svoisky, P.; Warchol, J.; Wayne, M.] Univ Notre Dame, Notre Dame, IN 46556 USA.
   [Parashar, N.] Purdue Univ Calumet, Hammond, IN 46323 USA.
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   [Abolins, M.; Benitez, J. A.; Brock, R.; Dyer, J.; Edmunds, D.; Hall, I.; Hauser, R.; Kraus, J.; Linnemann, J.; Piper, J.; Pope, B. G.; Schwienhorst, R.; Unalan, R.] Michigan State Univ, E Lansing, MI 48824 USA.
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   [Cammin, J.; Demina, R.; Ferbel, T.; Garcia, C.; Ginther, G.; Harel, A.; Park, S. -J.; Slattery, P.; Zielinski, M.] Univ Rochester, Rochester, NY 14627 USA.
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   [Begalli, M.; Evdokimov, A.; Patwa, A.; Protopopescu, S.; Snyder, S.; Yip, K.] Brookhaven Natl Lab, Upton, NY 11973 USA.
   [Snow, J.] Langston Univ, Langston, OK 73050 USA.
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   [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.
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RP Abazov, VM (reprint author), Joint Inst Nucl Res, Dubna, Russia.
RI Shivpuri, R K/A-5848-2010; Gutierrez, Phillip/C-1161-2011; Dudko,
   Lev/D-7127-2012; Leflat, Alexander/D-7284-2012; Perfilov,
   Maxim/E-1064-2012; 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; 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
OI Dudko, Lev/0000-0002-4462-3192; Novaes, Sergio/0000-0003-0471-8549;
   Mundim, Luiz/0000-0001-9964-7805; Yip, Kin/0000-0002-8576-4311; De,
   Kaushik/0000-0002-5647-4489; 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
NR 31
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 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD AUG 1
PY 2008
VL 101
IS 5
AR 051801
DI 10.1103/PhysRevLett.101.051801
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 336SK
UT WOS:000258384700011
ER

PT J
AU Barty, A
   Marchesini, S
   Chapman, HN
   Cui, C
   Howells, MR
   Shapiro, DA
   Minor, AM
   Spence, JCH
   Weierstall, U
   Ilavsky, J
   Noy, A
   Hau-Riege, SP
   Artyukhin, AB
   Baumann, T
   Willey, T
   Stolken, J
   van Buuren, T
   Kinney, JH
AF Barty, A.
   Marchesini, S.
   Chapman, H. N.
   Cui, C.
   Howells, M. R.
   Shapiro, D. A.
   Minor, A. M.
   Spence, J. C. H.
   Weierstall, U.
   Ilavsky, J.
   Noy, A.
   Hau-Riege, S. P.
   Artyukhin, A. B.
   Baumann, T.
   Willey, T.
   Stolken, J.
   van Buuren, T.
   Kinney, J. H.
TI Three-dimensional coherent x-ray diffraction imaging of a ceramic
   nanofoam: Determination of structural deformation mechanisms
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID STRUCTURE-PROPERTY RELATIONSHIP; MICROSCOPY; AEROGELS; RESOLUTION;
   SPECIMENS; CLUSTERS
AB Ultralow density polymers, metals, and ceramic nanofoams are valued for their high strength-to-weight ratio, high surface area, and insulating properties ascribed to their structural geometry. We obtain the labrynthine internal structure of a tantalum oxide nanofoam by x-ray diffractive imaging. Finite-element analysis from the structure reveals mechanical properties consistent with bulk samples and with a diffusion-limited cluster aggregation model, while excess mass on the nodes discounts the dangling fragments hypothesis of percolation theory.
C1 [Barty, A.; Marchesini, S.; Chapman, H. N.; Noy, A.; Hau-Riege, S. P.; Artyukhin, A. B.; Baumann, T.; Willey, T.; Stolken, J.; van Buuren, T.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   [Marchesini, S.; Cui, C.; Howells, M. R.; Shapiro, D. A.; Minor, A. M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [Marchesini, S.; Chapman, H. N.] Univ Calif Davis, Ctr Biophoton Sci & Technol, Sacramento, CA 95817 USA.
   [Spence, J. C. H.; Weierstall, U.] Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287 USA.
   [Ilavsky, J.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
   [Kinney, J. H.] Univ Calif San Francisco, Dept Prevent & Restorat Dent Sci, San Francisco, CA 94143 USA.
RP Marchesini, S (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94550 USA.
EM smarchesini@lbl.gov
RI Marchesini, Stefano/A-6795-2009; Chapman, Henry/G-2153-2010; Willey,
   Trevor/A-8778-2011; Weierstall, Uwe/B-3568-2011; Ilavsky,
   Jan/D-4521-2013; USAXS, APS/D-4198-2013; Barty, Anton/K-5137-2014
OI Chapman, Henry/0000-0002-4655-1743; Willey, Trevor/0000-0002-9667-8830;
   Ilavsky, Jan/0000-0003-1982-8900; Barty, Anton/0000-0003-4751-2727
NR 27
TC 61
Z9 61
U1 4
U2 29
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD AUG 1
PY 2008
VL 101
IS 5
AR 055501
DI 10.1103/PhysRevLett.101.055501
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 336SK
UT WOS:000258384700031
PM 18764404
ER

PT J
AU Chen, GF
   Li, Z
   Li, G
   Zhou, J
   Wu, D
   Dong, J
   Hu, WZ
   Zheng, P
   Chen, ZJ
   Yuan, HQ
   Singleton, J
   Luo, JL
   Wang, NL
AF Chen, G. F.
   Li, Z.
   Li, G.
   Zhou, J.
   Wu, D.
   Dong, J.
   Hu, W. Z.
   Zheng, P.
   Chen, Z. J.
   Yuan, H. Q.
   Singleton, J.
   Luo, J. L.
   Wang, N. L.
TI Superconducting properties of the Fe-based layered superconductor
   LaFeAsO(0.9)F(0.1-delta)
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
AB We have employed a new route to synthesize single phase F-doped LaOFeAs compound and confirmed the superconductivity above 20 K in this Fe-based system. We show that the new superconductor has a rather high upper critical field of over 50 T. A clear signature of superconducting gap opening below T(c) was observed in the far-infrared reflectance spectra, with 2 Delta/kT(c)approximate to 3.5-4.2. Furthermore, we show that the new superconductor has electron-type conducting carriers with a rather low-carrier density.
C1 [Chen, G. F.; Li, Z.; Li, G.; Zhou, J.; Wu, D.; Dong, J.; Hu, W. Z.; Zheng, P.; Chen, Z. J.; Luo, J. L.; Wang, N. L.] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
   [Yuan, H. Q.; Singleton, J.] Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA.
   [Yuan, H. Q.] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China.
RP Chen, GF (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
RI li, zheng/F-5189-2012; Li, Gang/E-3033-2015; Hu, Wanzheng/K-1171-2016
NR 16
TC 130
Z9 141
U1 8
U2 54
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD AUG 1
PY 2008
VL 101
IS 5
AR 057007
DI 10.1103/PhysRevLett.101.057007
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 336SK
UT WOS:000258384700051
PM 18764424
ER

PT J
AU Chittenden, JP
   Jennings, CA
AF Chittenden, J. P.
   Jennings, C. A.
TI Development of instabilities in wire-array Z pinches
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
AB 3D resistive MHD simulations are used to show how the properties of the "fundamental" mode of modulated ablation in wire-array Z pinches, are consistent with the growth of a modified m = 0-like instability. The modulation wavelength, structure, and evolution is found to be governed by the magnetic topology and is largely independent of the initial conditions. The perturbation amplitude as a function of wire number is shown to be consistent with experimental x-ray power scaling. Simulations of an array of helical wires show a substantial reduction in the amplitude of the instability.
C1 [Chittenden, J. P.] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England.
   [Jennings, C. A.] Sandia Natl Labs, Albuquerque, NM USA.
RP Chittenden, JP (reprint author), Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England.
NR 14
TC 43
Z9 43
U1 0
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD AUG 1
PY 2008
VL 101
IS 5
AR 055005
DI 10.1103/PhysRevLett.101.055005
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 336SK
UT WOS:000258384700029
PM 18764402
ER

PT J
AU Marianetti, CA
   Haule, K
   Kotliar, G
   Fluss, MJ
AF Marianetti, C. A.
   Haule, K.
   Kotliar, G.
   Fluss, M. J.
TI Electronic coherence in delta-Pu: A dynamical mean-field theory study
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID PLUTONIUM
AB A combination of density functional theory and the dynamical mean-field theory (DMFT) is used to calculate the magnetic susceptibility, heat capacity, and the temperature dependence of the valence band photoemission spectra for delta-Pu. We predict that delta-Pu has a Pauli-like magnetic susceptibility near ambient temperature, as in experiment, indicating that electronic coherence causes the absence of local moments. Additionally, we show that volume expansion causes a crossover from incoherent to coherent electronic behavior at increasingly lower temperatures.
C1 [Marianetti, C. A.; Fluss, M. J.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   [Haule, K.; Kotliar, G.] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
   [Haule, K.; Kotliar, G.] Rutgers State Univ, Ctr Condensed Matter Theory, Piscataway, NJ 08854 USA.
RP Marianetti, CA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
NR 24
TC 40
Z9 40
U1 1
U2 12
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD AUG 1
PY 2008
VL 101
IS 5
AR 056403
DI 10.1103/PhysRevLett.101.056403
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 336SK
UT WOS:000258384700039
PM 18764412
ER

PT J
AU Mazin, II
   Singh, DJ
   Johannes, MD
   Du, MH
AF Mazin, I. I.
   Singh, D. J.
   Johannes, M. D.
   Du, M. H.
TI Unconventional superconductivity with a sign reversal in the order
   parameter of LaFeAsO(1-x)F(x)
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ANTIFERROMAGNETIC SPIN-FLUCTUATION; YBA2CU3O7
AB We argue that the newly discovered superconductivity in a nearly magnetic, Fe-based layered compound is unconventional and mediated by antiferromagnetic spin fluctuations, though different from the usual superexchange and specific to this compound. This resulting state is an example of extended s-wave pairing with a sign reversal of the order parameter between different Fermi surface sheets. The main role of doping in this scenario is to lower the density of states and suppress the pair-breaking ferromagnetic fluctuations.
C1 [Mazin, I. I.; Johannes, M. D.] USN, Res Lab, Washington, DC 20375 USA.
   [Singh, D. J.; Du, M. H.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Mazin, II (reprint author), USN, Res Lab, Code 6393, Washington, DC 20375 USA.
RI Du, Mao-Hua/B-2108-2010; Singh, David/I-2416-2012; Mazin,
   Igor/B-6576-2008
OI Du, Mao-Hua/0000-0001-8796-167X; 
NR 14
TC 1750
Z9 1767
U1 20
U2 176
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD AUG 1
PY 2008
VL 101
IS 5
AR 057003
DI 10.1103/PhysRevLett.101.057003
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 336SK
UT WOS:000258384700047
PM 18764420
ER

PT J
AU Muggli, P
   Blue, BE
   Clayton, CE
   Decker, FJ
   Hogan, MJ
   Huang, C
   Joshi, C
   Katsouleas, TC
   Lu, W
   Mori, WB
   O'Connell, CL
   Siemann, RH
   Walz, D
   Zhou, M
AF Muggli, P.
   Blue, B. E.
   Clayton, C. E.
   Decker, F. J.
   Hogan, M. J.
   Huang, C.
   Joshi, C.
   Katsouleas, T. C.
   Lu, W.
   Mori, W. B.
   O'Connell, C. L.
   Siemann, R. H.
   Walz, D.
   Zhou, M.
TI Halo formation and emittance growth of positron beams in plasmas
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID WAKEFIELD ACCELERATOR; SPACE-CHARGE; ELECTRONS
AB An ultrarelativistic 28.5 GeV, 700-mu m-long positron bunch is focused near the entrance of a 1.4-m-long plasma with a density n(e) between approximate to 10(13) and approximate to 5 x 10(14) cm(-3). Partial neutralization of the bunch space charge by the mobile plasma electrons results in a reduction in transverse size by a factor of approximate to 3 in the high emittance plane of the beam approximate to 1 m downstream from the plasma exit. As n(e) increases, the formation of a beam halo containing approximate to 40% of the total charge is observed, indicating that the plasma focusing force is nonlinear. Numerical simulations confirm these observations. The bunch with an incoming transverse size ratio of approximate to 3 and emittance ratio of approximate to 5 suffers emittance growth and exits the plasma with approximately equal sizes and emittances.
C1 [Muggli, P.; Katsouleas, T. C.] Univ So Calif, Los Angeles, CA 90089 USA.
   [Blue, B. E.; Clayton, C. E.; Huang, C.; Joshi, C.; Lu, W.; Mori, W. B.; Zhou, M.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
   [Decker, F. J.; Hogan, M. J.; O'Connell, C. L.; Siemann, R. H.; Walz, D.] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
RP Muggli, P (reprint author), Univ So Calif, Los Angeles, CA 90089 USA.
RI Lu, Wei/F-2504-2016
NR 27
TC 18
Z9 18
U1 0
U2 2
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 AUG 1
PY 2008
VL 101
IS 5
AR 055001
DI 10.1103/PhysRevLett.101.055001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 336SK
UT WOS:000258384700025
PM 18764398
ER

PT J
AU Muggli, P
   Yakimenko, V
   Babzien, M
   Kallos, E
   Kusche, KP
AF Muggli, P.
   Yakimenko, V.
   Babzien, M.
   Kallos, E.
   Kusche, K. P.
TI Generation of trains of electron microbunches with adjustable
   subpicosecond spacing
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID WAKE-FIELD ACCELERATION; INJECTOR; LINAC; GUN
AB We demonstrate that trains of subpicosecond electron microbunches, with subpicosecond spacing, can be produced by placing a mask in a region of the beam line where the beam transverse size is dominated by the correlated energy spread. We show that the number, length, and spacing of the microbunches can be controlled through the parameters of the beam and the mask. Such microbunch trains can be further compressed and accelerated and have applications to free electron lasers and plasma wakefield accelerators.
C1 [Muggli, P.; Kallos, E.] Univ So Calif, Los Angeles, CA 90089 USA.
   [Yakimenko, V.; Babzien, M.; Kusche, K. P.] Brookhaven Natl Lab, Long Isl City, NY 11973 USA.
RP Muggli, P (reprint author), Univ So Calif, Los Angeles, CA 90089 USA.
NR 21
TC 91
Z9 91
U1 0
U2 7
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD AUG 1
PY 2008
VL 101
IS 5
AR 054801
DI 10.1103/PhysRevLett.101.054801
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 336SK
UT WOS:000258384700024
PM 18764397
ER

PT J
AU Schollmeier, M
   Becker, S
   Geissel, M
   Flippo, KA
   Blazevic, A
   Gaillard, SA
   Gautier, DC
   Gruner, F
   Harres, K
   Kimmel, M
   Nurnberg, F
   Rambo, P
   Schramm, U
   Schreiber, J
   Schutrumpf, J
   Schwarz, J
   Tahir, NA
   Atherton, B
   Habs, D
   Hegelich, BM
   Roth, M
AF Schollmeier, M.
   Becker, S.
   Geissel, M.
   Flippo, K. A.
   Blazevic, A.
   Gaillard, S. A.
   Gautier, D. C.
   Gruener, F.
   Harres, K.
   Kimmel, M.
   Nuernberg, F.
   Rambo, P.
   Schramm, U.
   Schreiber, J.
   Schuetrumpf, J.
   Schwarz, J.
   Tahir, N. A.
   Atherton, B.
   Habs, D.
   Hegelich, B. M.
   Roth, M.
TI Controlled transport and focusing of laser-accelerated protons with
   miniature magnetic devices
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ION-ACCELERATION; BEAMS; DRIVEN; IGNITION; SOLIDS; PLASMA
AB This Letter demonstrates the transporting and focusing of laser-accelerated 14 MeV protons by permanent magnet miniature quadrupole lenses providing field gradients of up to 500 T/m. The approach is highly reproducible and predictable, leading to a focal spot of (286 x 173) mu m full width at half maximum 50 cm behind the source. It decouples the relativistic laser-proton acceleration from the beam transport, paving the way to optimize both separately. The collimation and the subsequent energy selection obtained are perfectly applicable for upcoming high-energy, high-repetition rate laser systems.
C1 [Schollmeier, M.; Harres, K.; Schuetrumpf, J.; Roth, M.] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany.
   [Becker, S.; Gruener, F.; Schreiber, J.; Habs, D.; Hegelich, B. M.] Univ Munich, Dept Phys, D-85748 Garching, Germany.
   [Geissel, M.; Kimmel, M.; Rambo, P.; Schwarz, J.; Atherton, B.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
   [Flippo, K. A.; Gaillard, S. A.; Gautier, D. C.; Hegelich, B. M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Blazevic, A.; Tahir, N. A.] Gesell Schwerionenforsch mbH, Plasmaphys, D-64291 Darmstadt, Germany.
   [Gaillard, S. A.] Univ Nevada, Dept Phys, Reno, NV 89557 USA.
   [Schramm, U.] Forschungszentrum, D-01328 Dresden, Germany.
RP Schollmeier, M (reprint author), Tech Univ Darmstadt, Inst Kernphys, Schlossgartenstr 9, D-64289 Darmstadt, Germany.
RI Flippo, Kirk/C-6872-2009; Schramm, Ulrich/C-9393-2012; Schollmeier,
   Marius/H-1056-2012; Hegelich, Bjorn/J-2689-2013; Gruner,
   Florian/M-1212-2016
OI Flippo, Kirk/0000-0002-4752-5141; Schramm, Ulrich/0000-0003-0390-7671;
   Schollmeier, Marius/0000-0002-0683-022X; Gruner,
   Florian/0000-0001-8382-9225
NR 29
TC 100
Z9 100
U1 1
U2 14
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD AUG 1
PY 2008
VL 101
IS 5
AR 055004
DI 10.1103/PhysRevLett.101.055004
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 336SK
UT WOS:000258384700028
PM 18764401
ER

PT J
AU Torikachvili, MS
   Bud'ko, SL
   Ni, N
   Canfield, PC
AF Torikachvili, Milton S.
   Bud'ko, Sergey L.
   Ni, Ni
   Canfield, Paul C.
TI Pressure induced superconductivity in CaFe(2)As(2)
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
AB CaFe(2)As(2) has been found to be exceptionally sensitive to the application of hydrostatic pressure and can be tuned to reveal all the salient features associated with FeAs superconductivity without introducing any disorder. The ambient pressure, 170 K, structural/magnetic, first-order phase transition is suppressed to 128 K by 3.5 kbar. At 5.5 kbar a new transition is detected at 104 K, increasing to above 300 K by 19 kbar. A low temperature, superconducting dome (T(c) similar to 12 K) is centered around 5 kbar, extending down to 2.3 kbar and up to 8.6 kbar. This superconducting phase appears to exist when the low pressure transition is suppressed sufficiently, but before the high pressure transition has reduced the resistivity too dramatically.
C1 [Torikachvili, Milton S.] San Diego State Univ, Dept Phys, San Diego, CA 92182 USA.
   [Bud'ko, Sergey L.; Ni, Ni; Canfield, Paul C.] Iowa State Univ Sci & Technol, Ames Lab, US DOE, Ames, IA 50011 USA.
   [Bud'ko, Sergey L.; Ni, Ni; Canfield, Paul C.] Iowa State Univ Sci & Technol, Dept Phys & Astron, Ames, IA 50011 USA.
RP Torikachvili, MS (reprint author), San Diego State Univ, Dept Phys, San Diego, CA 92182 USA.
RI Canfield, Paul/H-2698-2014
NR 11
TC 390
Z9 393
U1 3
U2 59
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD AUG 1
PY 2008
VL 101
IS 5
AR 057006
DI 10.1103/PhysRevLett.101.057006
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 336SK
UT WOS:000258384700050
PM 18764423
ER

PT J
AU Ivanyan, M
   Laziev, E
   Tsakanov, V
   Vardanyan, A
   Heifets, S
   Tsakanian, A
AF Ivanyan, M.
   Laziev, E.
   Tsakanov, V.
   Vardanyan, A.
   Heifets, S.
   Tsakanian, A.
TI Multilayer tube impedance and external radiation
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID BEAM
AB The paper describes a method for calculating the longitudinal and transverse impedances of the laminated round pipe with many layers of different materials. The charge is moving along the pipe axis with arbitrary constant velocity. The study is based on the field-matching technique applied for the arbitrary harmonic of the electromagnetic field. The matrix formalism has been developed to describe the field transitions through the subsequent layers that allow coupling the electromagnetic fields inside and outside the pipe. The number of equations to be solved is then reduced to four algebraic equations. The solutions and ultrarelativistic limits for the field harmonics in the inner and outer regions of the pipe are derived.
C1 [Ivanyan, M.; Laziev, E.; Tsakanov, V.; Vardanyan, A.] Yerevan State Univ, CANDLE, Yerevan 0040, Armenia.
   [Heifets, S.] Stanford Univ, SLAC, Menlo Pk, CA 94025 USA.
   [Tsakanian, A.] Yerevan Phys Inst, Yerevan 0036, Armenia.
   [Tsakanian, A.] Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, Germany.
RP Ivanyan, M (reprint author), Yerevan State Univ, CANDLE, Acharyan 31, Yerevan 0040, Armenia.
NR 35
TC 6
Z9 6
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 AUG
PY 2008
VL 11
IS 8
AR 084001
DI 10.1103/PhysRevSTAB.11.084001
PG 10
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 350LE
UT WOS:000259353100006
ER

PT J
AU Li, YL
   Sun, YE
   Kim, KJ
AF Li, Yuelin
   Sun, Yin-E
   Kim, Kwang-Je
TI High-power beam-based coherently enhanced THz radiation source
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID GENERATION; AMPLIFICATION; PULSES; GUNS
AB We propose a compact Smith-Purcell radiation device that can potentially generate high average power THz radiation with high conversion efficiency. The source is based on a train of short electron bunches from an rf photoemission gun at an energy of a few MeV. Particle tracking simulation and analysis show that, with a beam current of 1 mA, it is feasible to generate hundreds of watts of narrow-band THz radiation at a repetition rate of 1 MHz.
C1 [Li, Yuelin; Sun, Yin-E; Kim, Kwang-Je] Argonne Natl Lab, Accelerator Syst Div, Argonne, IL 60439 USA.
   [Li, Yuelin; Sun, Yin-E; Kim, Kwang-Je] Argonne Natl Lab, Argonne Accelerator Inst, Argonne, IL 60439 USA.
   [Sun, Yin-E] Fermilab Natl Accelerator Lab, Accelerator Phys Ctr, Batavia, IL 60510 USA.
RP Li, YL (reprint author), Argonne Natl Lab, Accelerator Syst Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
FU U. S. Department of Energy; Office of Science; Office of Basic Energy
   Sciences [DE-AC02-06CH11357]
FX The authors thank K. Harkay for support. This work is supported by the
   U. S. Department of Energy, Office of Science, Office of Basic Energy
   Sciences, under Contract No. DE-AC02-06CH11357.
NR 28
TC 11
Z9 11
U1 1
U2 3
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 AUG
PY 2008
VL 11
IS 8
AR 080701
DI 10.1103/PhysRevSTAB.11.080701
PG 5
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 350LE
UT WOS:000259353100001
ER

PT J
AU Miyamoto, R
   Kopp, SE
   Jansson, A
   Syphers, MJ
AF Miyamoto, R.
   Kopp, S. E.
   Jansson, A.
   Syphers, M. J.
TI Parametrization of the driven betatron oscillation
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB An AC dipole is a magnet which produces a sinusoidally oscillating dipole field and excites coherent transverse beam oscillations in a synchrotron. By observing this driven coherent oscillation, the linear optical parameters can be directly measured at locations of the beam position monitors. The driven oscillations induced by an AC dipole will generate a phase space ellipse which differs from that of free oscillations. If not properly accounted for, this difference can lead to misinterpretations of the actual optical parameters, for instance, 6% or more in the cases of the Tevatron, RHIC, or LHC. This paper shows that the effect of an AC dipole on the observed linear optics is identical to that of a thin lens quadrupole. By introducing a new amplitude function to describe this new phase space ellipse, the motion produced by an AC dipole becomes easier to interpret. The introduction of this new amplitude function also helps measurements of the normal Courant-Snyder parameters based on beam position data taken under the influence of an AC dipole. This new parametrization of driven oscillations is presented and is used to interpret data taken in the FNAL Tevatron using an AC dipole.
C1 [Miyamoto, R.; Kopp, S. E.] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA.
   [Jansson, A.; Syphers, M. J.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Miyamoto, R (reprint author), Univ Texas Austin, Dept Phys, Austin, TX 78712 USA.
NR 13
TC 6
Z9 6
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 AUG
PY 2008
VL 11
IS 8
AR 084002
DI 10.1103/PhysRevSTAB.11.084002
PG 8
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 350LE
UT WOS:000259353100007
ER

PT J
AU Ranjbar, VH
   Ivanov, P
AF Ranjbar, V. H.
   Ivanov, P.
TI Chromaticity and wakefield effect on the transverse motion of
   longitudinal bunch slices in the Fermilab Tevatron
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB The transverse turn-by-turn evolution of a bunch slice after an impulse kick is examined considering chromatic and impedance effects. It is found that by fitting the envelope of the beam slice motion to simulated data the strength of the resistive wall wakefield can be determined.
C1 [Ranjbar, V. H.] Tech X Corp, Boulder, CO 80303 USA.
   [Ivanov, P.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Ranjbar, VH (reprint author), Tech X Corp, 5621 Arapahoe Ave,Suite A, Boulder, CO 80303 USA.
NR 8
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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 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD AUG
PY 2008
VL 11
IS 8
AR 084401
DI 10.1103/PhysRevSTAB.11.084401
PG 9
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 350LE
UT WOS:000259353100008
ER

PT J
AU Seo, PN
   Barron-Palos, L
   Bowman, JD
   Chupp, TE
   Crawford, C
   Dabaghyan, M
   Dawkins, M
   Freedman, SJ
   Gentile, T
   Gericke, MT
   Gillis, RC
   Greene, GL
   Hersman, FW
   Jones, GL
   Kandes, M
   Lamoreaux, S
   Lauss, B
   Leuschner, MB
   Mahurin, R
   Mason, M
   Mei, J
   Mitchell, GS
   Nann, H
   Page, SA
   Penttila, SI
   Ramsay, WD
   Bacci, AS
   Santra, S
   Sharma, M
   Smith, TB
   Snow, WM
   Wilburn, WS
   Zhu, H
AF Seo, P. -N.
   Barron-Palos, L.
   Bowman, J. D.
   Chupp, T. E.
   Crawford, C.
   Dabaghyan, M.
   Dawkins, M.
   Freedman, S. J.
   Gentile, T.
   Gericke, M. T.
   Gillis, R. C.
   Greene, G. L.
   Hersman, F. W.
   Jones, G. L.
   Kandes, M.
   Lamoreaux, S.
   Lauss, B.
   Leuschner, M. B.
   Mahurin, R.
   Mason, M.
   Mei, J.
   Mitchell, G. S.
   Nann, H.
   Page, S. A.
   Penttila, S. I.
   Ramsay, W. D.
   Bacci, A. Salas
   Santra, S.
   Sharma, M.
   Smith, T. B.
   Snow, W. M.
   Wilburn, W. S.
   Zhu, H.
TI High-efficiency resonant rf spin rotator with broad phase space
   acceptance for pulsed polarized cold neutron beams
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID GAMMA-RAY ASYMMETRIES; FLIPPER; CAPTURE; FILTER; FIELDS; CL-35; ECHO; CL
AB High precision fundamental neutron physics experiments have been proposed for the intense pulsed spallation neutron beams at JSNS, LANSCE, and SNS to test the standard model and search for new physics. Certain systematic effects in some of these experiments have to be controlled at the few ppb level. The NPDGamma experiment, a search for the small parity-violating gamma-ray asymmetry A(gamma) in polarized cold neutron capture on parahydrogen, is one example. For the NPDGamma experiment we developed a radio-frequency resonant spin rotator to reverse the neutron polarization in a 9.5 cm x 9.5 cm pulsed cold neutron beam with high efficiency over a broad cold neutron energy range. The effect of the spin reversal by the rotator on the neutron beam phase space is compared qualitatively to rf neutron spin flippers based on adiabatic fast passage. We discuss the design of the spin rotator and describe two types of transmission-based neutron spin-flip efficiency measurements where the neutron beam was both polarized and analyzed by optically polarized (3)He neutron spin filters. The efficiency of the spin rotator was measured at LANSCE to be 98.8 +/- 0.5% for neutron energies from 3 to 20 meV over the full phase space of the beam. Systematic effects that the rf spin rotator introduces to the NPDGamma experiment are considered.
C1 [Seo, P. -N.; Bowman, J. D.; Lamoreaux, S.; Mitchell, G. S.; Penttila, S. I.; Bacci, A. Salas; Wilburn, W. S.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Barron-Palos, L.] Arizona State Univ, Tempe, AZ 85287 USA.
   [Chupp, T. E.; Kandes, M.; Sharma, M.] Univ Michigan, Ann Arbor, MI 48104 USA.
   [Crawford, C.; Mahurin, R.] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA.
   [Dabaghyan, M.; Hersman, F. W.; Mason, M.; Zhu, H.] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA.
   [Dawkins, M.; Leuschner, M. B.; Mei, J.; Nann, H.; Santra, S.; Snow, W. M.] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA.
   [Freedman, S. J.; Lauss, B.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   [Gentile, T.] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
   [Gericke, M. T.; Gillis, R. C.; Page, S. A.; Ramsay, W. D.] Univ Manitoba, Dept Phys, Winnipeg, MB R3T 2N2, Canada.
   [Greene, G. L.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   [Jones, G. L.] Hamilton Coll, Dept Phys, Clinton, NY 13323 USA.
   [Ramsay, W. D.] TRIUMF, Vancouver, BC V6T 2A3, Canada.
   [Smith, T. B.] Univ Dayton, Dept Phys, Dayton, OH 45469 USA.
RP Seo, PN (reprint author), Triangle Univ Nucl Lab, Durham, NC 27708 USA.
EM pilneyo@tunl.duke.edu
FU Department of Energy [W-7405-ENG-36]; National Science Foundation
   [PHY-0100348, PHY-0457219]; Natural Science and Engineering Research
   Council of Canada; Japanese Grant-in-Aid for Scientific Research
   [A12304014]
FX The authors would like to thank Mr. G. Peralta for his technical
   contribution to the success of this work. The work was supported in part
   by the U. S. Department of Energy (Office of Energy Research, under
   Contract No. W-7405-ENG-36), the National Science Foundation (Grants No.
   PHY-0100348 and No. PHY-0457219), the Natural Science and Engineering
   Research Council of Canada, and the Japanese Grant-in-Aid for Scientific
   Research A12304014. M. Snow thanks the Institute for Nuclear Theory at
   the University of Washington for its hospitality and the Department of
   Energy for partial support during the completion of this work.
NR 32
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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 AUG
PY 2008
VL 11
IS 8
AR 084701
DI 10.1103/PhysRevSTAB.11.084701
PG 15
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 350LE
UT WOS:000259353100009
ER

PT J
AU Brizard, AJ
   Kaufman, AN
   Tracy, ER
AF Brizard, A. J.
   Kaufman, A. N.
   Tracy, E. R.
TI Recirculation in multiple wave conversions
SO PHYSICS OF PLASMAS
LA English
DT Article
ID MODE CONVERSION; LINEAR-CONVERSION
AB A one-dimensional multiple wave-conversion model is constructed that allows energy recirculation in ray phase space. Using a modular eikonal approach, the connection coefficients for this model are calculated by ray phase-space methods. Analytical results (confirmed numerically) show that all connection coefficients exhibit interference effects that depend on an interference phase, calculated from the coupling constants and the area enclosed by the intersecting rays. This conceptual model, which focuses on the topology of intersecting rays in phase space, is used to investigate how mode conversion between primary and secondary waves is modified by the presence of a tertiary wave. (C) 2008 American Institute of Physics.
C1 [Brizard, A. J.] St Michaels Coll, Dept Chem & Phys, Colchester, VT 05439 USA.
   [Kaufman, A. N.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   [Kaufman, A. N.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [Tracy, E. R.] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA.
RP Brizard, AJ (reprint author), St Michaels Coll, Dept Chem & Phys, Colchester, VT 05439 USA.
FU U.S. DoE [DE-AC03-76SFOO098, DE-FG02-96ER54344]; NSF-DoE
   [DE-FG02-06ER54885]
FX This work was supported by U.S. DoE under Grant No. DE-AC03-76SFOO098.
   One of us (E.R.T.) also acknowledges support from U.S. DoE under Grant
   No. DE-FG02-96ER54344 and NSF-DoE under Contract No. DE-FG02-06ER54885.
NR 15
TC 3
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U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD AUG
PY 2008
VL 15
IS 8
AR 082116
DI 10.1063/1.2975215
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 351TN
UT WOS:000259448900021
ER

PT J
AU Cottrill, LA
   Langdon, AB
   Lasinski, BF
   Lund, SM
   Molvig, K
   Tabak, M
   Town, RPJ
   Williams, EA
AF Cottrill, L. A.
   Langdon, A. B.
   Lasinski, B. F.
   Lund, S. M.
   Molvig, K.
   Tabak, M.
   Town, R. P. J.
   Williams, E. A.
TI Kinetic and collisional effects on the linear evolution of fast ignition
   relevant beam instabilities
SO PHYSICS OF PLASMAS
LA English
DT Article
ID WEIBEL INSTABILITY; PLASMA; MODEL
AB The fast ignition scheme will involve the generation and transport of a relativistic electron beam, which may be subject to a number of instabilities that act to inhibit energy transport. This study will address the effects of collisions and the initial electron beam distribution on the linear evolution of these instabilities for theoretical distributions including the relativistic waterbag, the relativistic Maxwellian (Juttner), and the saddle point (low temperature) approximation of the relativistic Maxwellian. It will then be shown that a more physical distribution obtained from a 2D explicit particle-in-cell simulation of the laser-plasma interaction can be best modeled with a Juttner distribution, but well-approximated with a relativistic waterbag distribution. In sum, for all distributions of interest, collisions were found to have the ability to both suppress and enhance growth for the filamentary instability, while they only suppress growth for the two-stream instability. (C) 2008 American Institute of Physics.
C1 [Cottrill, L. A.; Langdon, A. B.; Lasinski, B. F.; Lund, S. M.; Tabak, M.; Town, R. P. J.; Williams, E. A.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
   [Cottrill, L. A.; Molvig, K.] MIT, Dept Nucl Sci & Engn, Cambridge, MA 02139 USA.
RP Cottrill, LA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
FU U.S. Department of Energy [DE-AC52-07NA27344]
FX This work performed under the auspices of the U.S. Department of Energy
   by Lawrence Livermore National Laboratory under Contract No.
   DE-AC52-07NA27344.
NR 20
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PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD AUG
PY 2008
VL 15
IS 8
AR 082108
DI 10.1063/1.2953816
PG 12
WC Physics, Fluids & Plasmas
SC Physics
GA 351TN
UT WOS:000259448900013
ER

PT J
AU Hamp, WT
   Jarboe, TR
   Nelson, BA
   O'Neill, RG
   Raman, R
   Redd, AJ
   Stewart, BT
   Mueller, D
AF Hamp, W. T.
   Jarboe, T. R.
   Nelson, B. A.
   O'Neill, R. G.
   Raman, R.
   Redd, A. J.
   Stewart, B. T.
   Mueller, D.
TI Temperature and density characteristics of the Helicity Injected
   Torus-II spherical tokamak indicating closed flux sustainment using
   coaxial helicity injection
SO PHYSICS OF PLASMAS
LA English
DT Article
ID CURRENT DRIVE EXPERIMENTS; MAGNETIC RECONNECTION; HIT-II; PLASMA;
   RELAXATION; SPHEROMAK; PROGRESS
AB The electron temperature and density profiles of plasmas in the Helicity Injected Torus [HIT-II: T. R. Jarboe et al., Phys. Plasmas 5, 1807 (1998)] experiment are measured by multipoint Thomson scattering (MPTS). The HIT-II device is a small low-aspect-ratio tokamak (major radius 0.3 m, minor radius 0.2 m, toroidal field of up to 0.5 T), capable of inductive ohmic (OH) current drive, Coaxial Helicity Injection (CHI) current drive, or combinations of both. The temperature and density characteristics have been characterized by a ruby laser MPTS diagnostic at up to six locations within the plasma for a single diagnostic time per discharge. Observed hollow temperature profiles of CHI discharges are inconsistent with open flux only predictions for CHI and indicate a closed flux region during CHI current drive. 0 2008 American Institute of Physics.
C1 [Hamp, W. T.; Jarboe, T. R.; Nelson, B. A.; O'Neill, R. G.; Raman, R.; Redd, A. J.; Stewart, B. T.] Univ Washington, Seattle, WA 98195 USA.
   [Mueller, D.] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Hamp, WT (reprint author), Univ Washington, Box 352250, Seattle, WA 98195 USA.
EM willhamp@u.washington.edu
NR 31
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PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD AUG
PY 2008
VL 15
IS 8
AR 082501
DI 10.1063/1.2968205
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 351TN
UT WOS:000259448900039
ER

PT J
AU Mynick, HE
   Boozer, AH
AF Mynick, H. E.
   Boozer, A. H.
TI Anisotropic pressure, transport, and shielding of magnetic perturbations
SO PHYSICS OF PLASMAS
LA English
DT Article
ID BANANA-DRIFT TRANSPORT; DIII-D; TOKAMAKS; FIELD; DIFFUSION; PLASMA;
   RIPPLE; EQUILIBRIUM; MODE
AB The effect on a tokamak of applying a nonaxisymmetric magnetic perturbation delta B is computed. An equilibrium with scalar pressure p yields zero net radial current, and therefore zero torque. Thus, the usual approach, which assumes scalar pressure, is not self-consistent, and masks the close connection that exists between that radial current and the in-surface currents, which provide shielding or amplification of delta B. Here, the pressure anisotropy, p(parallel to),p(perpendicular to) not equal p, and from this, both the radial and in-surface currents, are analytically computed. The surface average of the radial current recovers earlier expressions for ripple transport, while the in-surface currents provide an expression for the amount of self-consistent shielding the plasma provides. (C) 2008 American Institute of Physics.
C1 [Mynick, H. E.] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA.
   [Boozer, A. H.] Columbia Univ, Dept Appl Phys & Math, New York, NY 10027 USA.
RP Mynick, HE (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
FU U.S. Department of Energy [DE-AC02-76-CH03073, DE-FG02-95ER54333]
FX The authors are grateful to J.-K. Park for informative discussions
   related to this work. This work supported by U.S. Department of Energy
   Contract No. DE-AC02-76-CH03073. A.H.B. has support under U.S.
   Department of Energy Grant No. DE-FG02-95ER54333.
NR 25
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U1 1
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PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD AUG
PY 2008
VL 15
IS 8
AR 082502
DI 10.1063/1.2965139
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 351TN
UT WOS:000259448900040
ER

PT J
AU Ren, Y
   Yamada, M
   Ji, H
   Dorfman, S
   Gerhardt, SP
   Kulsrud, R
AF Ren, Yang
   Yamada, Masaaki
   Ji, Hantao
   Dorfman, Seth
   Gerhardt, Stefan P.
   Kulsrud, Russel
TI Experimental study of the Hall effect and electron diffusion region
   during magnetic reconnection in a laboratory plasma
SO PHYSICS OF PLASMAS
LA English
DT Article
ID SWEET-PARKER; COLLISIONLESS RECONNECTION; FIELD; CHALLENGE; SYSTEM;
   DISSIPATION; MAGNETOTAIL
AB The Hall effect during magnetic reconnection without an external guide field has been extensively studied in the laboratory plasma of the Magnetic Reconnection Experiment [M. Yamada et al., Phys. Plasmas 4, 1936 (1997)] by measuring its key signature, an out-of-plane quadrupole magnetic field, with magnetic probe arrays whose spatial resolution is on the order of the electron skin depth. The in-plane electron flow is deduced from out-of-plane magnetic field measurements. The measured in-plane electron flow and numerical results are in good agreement. The electron diffusion region is identified by measuring the electron outflow channel. The width of the electron diffusion region scales with the electron skin depth (similar to 5.5-7.5c/omega(pe)) and the peak electron outflow velocity scales with the electron Alfven velocity (similar to 0.12-0.16V(eA)), independent of ion mass. The measured width of the electron diffusion region is much wider and the observed electron outflow is much slower than those obtained in 2D numerical simulations. It is found that the classical and anomalous dissipation present in the experiment can broaden the electron diffusion region and slow the electron outflow. As a consequence, the electron outflow flux remains consistent with numerical simulations. The ions, as measured by a Mach probe, have a much wider outflow channel than the electrons, and their outflow is much slower than the electron outflow everywhere in the electron diffusion region. (C) 2008 American Institute of Physics.
C1 [Ren, Yang; Yamada, Masaaki; Ji, Hantao; Dorfman, Seth; Gerhardt, Stefan P.; Kulsrud, Russel] Princeton Univ, Princeton Plasma Phys Lab, Ctr Magnet Self Org Lab & Astrophys Plasmas, Princeton, NJ 08543 USA.
RP Ren, Y (reprint author), Univ Wisconsin, Madison, WI 53706 USA.
RI Yamada, Masaaki/D-7824-2015
OI Yamada, Masaaki/0000-0003-4996-1649
FU DOE; NASA; NSF
FX This work was jointly supported by DOE, NASA, and NSF.
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PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD AUG
PY 2008
VL 15
IS 8
AR 082113
DI 10.1063/1.2936269
PG 20
WC Physics, Fluids & Plasmas
SC Physics
GA 351TN
UT WOS:000259448900018
ER

PT J
AU Roytershteyn, V
   Daughton, W
AF Roytershteyn, V.
   Daughton, W.
TI Collisionless instability of thin current sheets in the presence of
   sheared parallel flows
SO PHYSICS OF PLASMAS
LA English
DT Article
ID PLASMA; DYNAMICS
AB The first results of an ongoing investigation of the influence of sheared parallel flows on the onset of collisionless magnetic reconnection in thin current sheets are reported. In particular, an exact kinetic equilibrium that incorporates flow with a symmetric profile into the well-known Harris model is proposed and its linear stability is described. The complete linearized Vlasov-Maxwell system is solved using a numerical approach that introduces no approximations regarding the shape of the particle orbits or relative magnitude of the different components of the electromagnetic potentials. Thus accurate results are obtained in a difficult, but practically important limit where the characteristic length scales for the variation of the equilibrium magnetic field and flow are comparable to the ion kinetic length scales. In particular, the dispersion relation for an instability that produces magnetic reconnection is traced as a function of the flow speed V(0) at the center of the sheet, starting with the collisionless tearing mode at V(0)=0. The effects of the sheared flow are shown to qualitatively depend on the thickness of the current sheet. In relatively thick sheets the characteristic features of the dispersion relation depend mostly on the value of the flow shear, In this regime there exist regions of the parameter space where the flow is destabilizing. However, the growth rate of the instability never significantly exceeds that of the collisionless tearing mode and the mode is always stabilized at high enough values of V(0). When the sheet is thinner than the ion gyroradius in the asymptotic magnetic field, the flow shear introduces strong non-Maxwellian features into the equilibrium distribution function. In this regime, the flow is purely stabilizing for the equilibrium considered. The instability produces magnetic reconnection in all the parameter regimes considered. Finally, the results of the linear analysis are verified using large-scale particle-in-cell simulations. (C) 2008 American Institute of Physics.
C1 [Roytershteyn, V.] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA.
   [Daughton, W.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Roytershteyn, V (reprint author), Los Alamos Natl Lab, MS K717, Los Alamos, NM 87545 USA.
RI Daughton, William/L-9661-2013; 
OI Roytershteyn, Vadim/0000-0003-1745-7587
FU NASA [14262600]; National Science Foundation [0447423]
FX V.R. would like to acknowledge the hospitality of T-15 group at Los
   Alamos National Laboratory. This material is based on work supported by
   NASA under Grant No. 14262600 and by the National Science Foundation
   under Grant No. 0447423. Simulations were performed using the
   Institutional Computing resources at Los Alamos National Laboratory.
NR 13
TC 7
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U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD AUG
PY 2008
VL 15
IS 8
AR 082901
DI 10.1063/1.2968459
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 351TN
UT WOS:000259448900051
ER

PT J
AU Shaing, KC
   Cahyna, P
   Becoulet, M
   Park, JK
   Sabbagh, SA
   Chu, MS
AF Shaing, K. C.
   Cahyna, P.
   Becoulet, M.
   Park, J. -K.
   Sabbagh, S. A.
   Chu, M. S.
TI Collisional boundary layer analysis for neoclassical toroidal plasma
   viscosity in tokamaks
SO PHYSICS OF PLASMAS
LA English
DT Article
ID MOMENTUM DISSIPATION; TRANSPORT; CONFINEMENT; REGIME; FLOW
AB It is demonstrated that the pitch angle integrals in the transport fluxes in the nu regime calculated in K. C. Shang [Phys. Plasmas 10, 1443 (2003)] are divergent as the trapped-circulating boundary is approached. Here, nu is the collision frequency. The origin of this divergence results from the logarithmic dependence in the bounce averaged radial drift velocity. A collisional boundary layer analysis is developed to remove the singularity. The resultant pitch angle integrals now include not only the original physics of the nu regime but also the boundary layer physics. The transport fluxes, caused by the particles inside the boundary layer, scale as root nu. (C) 2008 American Institute of Physics.
C1 [Shaing, K. C.] Natl Cheng Kung Univ, Plasma & Space Sci Ctr, Tainan 70101, Taiwan.
   [Shaing, K. C.] Natl Cheng Kung Univ, Dept Phys, Tainan 70101, Taiwan.
   [Cahyna, P.] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA.
   [Cahyna, P.] Assoc EURATOM IPP CR, Inst Plasma Phys AS CR, Prague, Czech Republic.
   [Becoulet, M.] CEA DSM IRFM, Assoc EURATOM, Ctr Cadarache, F-13108 St Paul Les Durance, France.
   [Park, J. -K.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
   [Sabbagh, S. A.] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA.
   [Chu, M. S.] Gen Atom Co, San Diego, CA 92185 USA.
RP Shaing, KC (reprint author), Natl Cheng Kung Univ, Plasma & Space Sci Ctr, Tainan 70101, Taiwan.
RI Sabbagh, Steven/C-7142-2011; Cahyna, Pavel/G-9116-2014
FU National Science Council, Republic of China; U.S. Department of Energy
   [DE-FG02-01ER54619]; European Communities [FU07-CT-2007-00060]
FX This work was partly supported by the National Science Council, Republic
   of China (K.C.S.), by the U.S. Department of Energy under Grant No.
   DE-FG02-01ER54619 with the University of Wisconsin (K.C.S.), and by the
   European Communities under the contract of Association between EURATOM
   and IPP.CR No. FU07-CT-2007-00060 (P.C.). The views and opinions
   expressed herein do not necessarily reflect those of the European
   Commission.
NR 15
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U1 1
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PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD AUG
PY 2008
VL 15
IS 8
AR 082506
DI 10.1063/1.2969434
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 351TN
UT WOS:000259448900044
ER

PT J
AU Smith, SP
   Jardin, SC
AF Smith, S. P.
   Jardin, S. C.
TI Ideal magnetohydrodynamics stability spectrum with a resistive wall
SO PHYSICS OF PLASMAS
LA English
DT Article
ID NORMAL MODE ANALYSIS; PLASMA ROTATION; STABILIZATION; TOKAMAK; FEEDBACK
AB The eigenvalue equations describing a cylindrical ideal magnetohydrodynamics plasma interacting with a thin resistive wall are presented in the standard mathematical form, A.x=lambda B.x, without discretizing the vacuum regions surrounding the plasma. This is accomplished by using a finite-element basis for the plasma perturbations, and by coupling the plasma surface perturbations to the perturbed electrical current in the wall using a Green's-function approach. The perturbed wall cur-rent introduces a single additional degree of freedom into the system, which, together with an auxiliary variable, u=omega xi, allows the system to take the standard linear form. The standard form allows the use of linear eigenvalue solvers, without additional iterations, to compute the complete spectrum of plasma modes in the presence of a surrounding resistive wall at arbitrary separation. Standard results are recovered in the limits of (i) an infinitely resistive wall (no wall), and (ii) a zero resistance wall (ideal wall). (C) 2008 American Institute of Physics.
C1 [Smith, S. P.; Jardin, S. C.] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Smith, SP (reprint author), Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA.
EM spsmith@pppl.gov
RI Smith, Sterling/A-9279-2009; Jardin, Stephen/E-9392-2010; 
OI Smith, Sterling/0000-0003-1526-380X
FU United States Department of Energy (U.S. DOE) [DE-AC02-76CH0307]; Oak
   Ridge Associated Universities
FX We wish to thank J. Freidberg and L. Guazzotto for bringing this problem
   to our attention and for many useful discussions. The work of S. P.
   Smith was performed under appointment to the Fusion Energy Sciences
   Fellowship Program administered, by Oak Ridge Institute for Science and
   Education under a contract between the United States Department of
   Energy (U.S. DOE) and the Oak Ridge Associated Universities. This work
   was also supported by U.S. DOE Contract No. DE-AC02-76CH0307.
NR 12
TC 5
Z9 5
U1 0
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD AUG
PY 2008
VL 15
IS 8
AR 080701
DI 10.1063/1.2965499
PG 4
WC Physics, Fluids & Plasmas
SC Physics
GA 351TN
UT WOS:000259448900002
ER

PT J
AU Wong, SK
   Chan, VS
   Solomon, WM
AF Wong, S. K.
   Chan, V. S.
   Solomon, W. M.
TI Poloidal velocity of impurity ions in neoclassical theory
SO PHYSICS OF PLASMAS
LA English
DT Article
ID TOROIDAL ROTATION; TRANSPORT-THEORY; TOKAMAK PLASMAS; ASPECT-RATIO;
   REGIME
AB A formula for the poloidal velocity of impurity ions in a two-species plasma is derived from neoclassical theory in the banana regime, with corrections from the boundary layer separating the trapped and transiting ions. The formula is applicable to plasmas with toroidal rotations that can approach the thermal speeds of the ions. Using the formula to determine the poloidal velocity of C(+6) ions in a recently reported experiment [W. M. Solomon et al., Phys. Plasmas 13, 056116 (2006)] leads to agreement in the direction of the central region when it is otherwise from theories without strong toroidal rotations. Comparisons among these theories are made, demonstrating the degree of uncertainty of theoretical predictions. (C) 2008 American Institute of Physics.
C1 [Wong, S. K.; Chan, V. S.] Gen Atom Co, San Diego, CA 92186 USA.
   [Solomon, W. M.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Wong, SK (reprint author), San Diego Mesa Coll, San Diego, CA USA.
EM wongs@fusion.gat.com
OI Solomon, Wayne/0000-0002-0902-9876
FU U.S. Department of Energy [DE-FG02-95ER54309, DE-AC02-76CH03073]
FX We thank K. H. Burrell and J. S. deGrassie for useful discussions, L. L.
   Lao for providing plasma profile data, and R. E. Waltz for suggestions
   on improving the manuscript. This work was supported by the U.S.
   Department of Energy under Contract Nos. DE-FG02-95ER54309 and
   DE-AC02-76CH03073.
NR 13
TC 7
Z9 7
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD AUG
PY 2008
VL 15
IS 8
AR 082503
DI 10.1063/1.2969438
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 351TN
UT WOS:000259448900041
ER

PT J
AU Dean, DJ
AF Dean, David J.
TI More light on the structure of nuclei - Reply
SO PHYSICS TODAY
LA English
DT Letter
C1 Oak Ridge Natl Lab, Oak Ridge, TN USA.
RP Dean, DJ (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN USA.
EM deandj@ornl.gov
NR 2
TC 0
Z9 0
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0031-9228
J9 PHYS TODAY
JI Phys. Today
PD AUG
PY 2008
VL 61
IS 8
BP 13
EP 13
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 334UZ
UT WOS:000258248000009
ER

PT J
AU Moran, B
AF Moran, Bill
TI LED efficiencies: Apples and oranges
SO PHYSICS TODAY
LA English
DT Letter
C1 Lawrence Livermore Natl Lab, Livermore, CA USA.
RP Moran, B (reprint author), Lawrence Livermore Natl Lab, Livermore, CA USA.
EM moran1@llnl.gov
NR 0
TC 0
Z9 0
U1 1
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 0031-9228
J9 PHYS TODAY
JI Phys. Today
PD AUG
PY 2008
VL 61
IS 8
BP 15
EP 15
DI 10.1063/1.2970953
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 334UZ
UT WOS:000258248000013
ER

PT J
AU DePaolo, DJ
   Orr, FM
AF DePaolo, Donald J.
   Orr, Franklin M., Jr.
TI Geoscience research for our energy future
SO PHYSICS TODAY
LA English
DT Article
ID AQUIFER
C1 [DePaolo, Donald J.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
   [DePaolo, Donald J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
   [Orr, Franklin M., Jr.] Stanford Univ, Global Climate & Energy Project, Stanford, CA 94305 USA.
RP DePaolo, DJ (reprint author), Univ Calif Berkeley, Berkeley, CA 94720 USA.
NR 14
TC 8
Z9 8
U1 3
U2 10
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0031-9228
J9 PHYS TODAY
JI Phys. Today
PD AUG
PY 2008
VL 61
IS 8
BP 46
EP 51
DI 10.1063/1.2970212
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 334UZ
UT WOS:000258248000026
ER

PT J
AU Yu, XH
   Chen, MH
   Liu, CJ
AF Yu, Xiao-Hong
   Chen, Min-Huei
   Liu, Chang-Jun
TI Nucleocytoplasmic-localized acyltransferases catalyze the malonylation
   of 7-O-glycosidic (iso)flavones in Medicago truncatula
SO PLANT JOURNAL
LA English
DT Article
DE malonyltransferase; isoflavonoids; Medicago truncatula; nuclear
   localization
ID CICER-ARIETINUM-L; COA-ANTHOCYANIN
   5-O-GLUCOSIDE-6'''-O-MALONYLTRANSFERASE; SALVIA-SPLENDENS FLOWERS;
   CELL-SUSPENSION CULTURES; ARABIDOPSIS-THALIANA; CDNA CLONING;
   COENZYME-A; HETEROLOGOUS EXPRESSION; O-METHYLTRANSFERASE; BAHD
   SUPERFAMILY
AB (Iso)flavonoids are commonly accumulated as malonylated or acetylated glycoconjugates in legumes. Sequence analysis on EST database of the model legume Medicago truncatula enabled us to identify nine cDNA sequences encoding BAHD super-family enzymes that are distinct from the most of the characterized anthocyanin/flavonol acyltransferase genes in other species. Functional characterization revealed that three of these corresponding enzymes, MtMaT1, 2 and 3, specifically recognize malonyl CoA as an acyl donor and catalyze the malonylation of a range of isoflavone 7-O-glucosides in vitro. These malonyltransferase genes displayed distinct tissue-specific expression patterns and responded differentially to biotic and abiotic stresses. Consistent with gene expression, the level of the accumulated malonyl isoflavone glucoside was altered in the roots of M. truncatula grown under normal and drought-stressed conditions. Overexpression of the MtMaT1 gene in a previously engineered Arabidopsis line that accumulates genistein glycosides (Proc. Natl Acad. Sci. USA, 99, 2002: 14578) led to a malonylated product. Confocal microscopy of the transiently expressed MtMaT1-GFP fusion revealed strong fluorescence in both the cytoplasm and nucleus of M. truncatula and tobacco leaf cells. A truncated MtMaT1 lacking the C-terminal polypeptide of 110 amino acid residues that include the DFGWG motif, the single conserved sequence signature of BAHD super-family members, retained considerable catalytic efficiency, but showed an altered optimum pH preference for maximum activity. Such C-terminal polypeptide deletion or deletion of the DFGWG motif alone led to improper folding of the transiently expressed GFP fusion protein in living cells, and impaired nuclear localization of the enzyme.
C1 [Yu, Xiao-Hong; Liu, Chang-Jun] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
   [Chen, Min-Huei] SUNY Stony Brook, Dept Biochem & Cell Biol, Stony Brook, NY 11794 USA.
RP Liu, CJ (reprint author), Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
EM cliu@bnl.gov
FU Department of Energy Office of Biological Environmental Research
   [130-135]; Brookhaven National Laboratory's Laboratory Directed Research
   and Development program, DOE
FX We thank Dr Richard Dixon of the Samuel Roberts Noble Foundation for M.
   truncatula EST clones, Dr Vitaly Citovsky at the State University of New
   York, Stony Brook, for sharing the confocal microscope, and Michael
   Blewitt (Brookhaven National Laboratory, USA) for DNA sequencing. The
   work was supported by the Plant Feedstock Genomics Program from the
   Department of Energy Office of Biological Environmental Research
   (130-135), and by Brookhaven National Laboratory's Laboratory Directed
   Research and Development program, under contract with the DOE.
NR 64
TC 32
Z9 34
U1 2
U2 16
PU WILEY-BLACKWELL PUBLISHING, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0960-7412
J9 PLANT J
JI Plant J.
PD AUG
PY 2008
VL 55
IS 3
BP 382
EP 396
DI 10.1111/j.1365-313X.2008.03509.x
PG 15
WC Plant Sciences
SC Plant Sciences
GA 396QD
UT WOS:000262605300003
PM 18419782
ER

PT J
AU Kramer, GJ
   Fu, GY
   Nazikian, R
   Budny, RV
   Cheng, CZ
   Gorelenkov, NN
   Pinches, SD
   Sharapov, SE
   Zastrow, KD
AF Kramer, G. J.
   Fu, G. Y.
   Nazikian, R.
   Budny, R. V.
   Cheng, C. Z.
   Gorelenkov, N. N.
   Pinches, S. D.
   Sharapov, S. E.
   Zastrow, K. -D
CA JET-EFDA Contributors
TI Reversed shear Alfven eigenmodes in the frequency range of the
   triangularity induced gap on JET
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article
ID AXISYMMETRICAL TOROIDAL PLASMAS; DRIVEN
AB Reversed shear Alfven eigenmodes in the non-circular triangularity induced Alfven eigenmode frequency range are observed during the current ramp-up phase in JET discharges. Ideal magnetohydrodynamical calculations are able to reproduce the observed Alfv en eigenmode spectra accurately. It was found that these modes come into existence because of the plasma elongation.
C1 [Kramer, G. J.; Fu, G. Y.; Nazikian, R.; Budny, R. V.; Cheng, C. Z.; Gorelenkov, N. N.; Pinches, S. D.; Sharapov, S. E.; Zastrow, K. -D] Culham Lab, JET EFDA, Abingdon OX14 3DB, Oxon, England.
   [Kramer, G. J.; Fu, G. Y.; Nazikian, R.; Budny, R. V.; Gorelenkov, N. N.] Princeton Plasma Phys Labs, Princeton, NJ 08543 USA.
   [Cheng, C. Z.] Natl Cheng Kung Univ, Plasma & Space Sci Ctr, Tainan 70101, Taiwan.
   [Pinches, S. D.; Sharapov, S. E.; Zastrow, K. -D] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.
RP Kramer, GJ (reprint author), Culham Lab, JET EFDA, Abingdon OX14 3DB, Oxon, England.
EM gkramer@pppl.gov
RI Cheng, Chio/K-1005-2014
NR 19
TC 5
Z9 5
U1 0
U2 6
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 AUG
PY 2008
VL 50
IS 8
AR 082001
DI 10.1088/0741-3335/50/8/082001
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 321SG
UT WOS:000257326200001
ER

PT J
AU Svidzinski, VA
AF Svidzinski, Vladimir A.
TI Stability analysis of plasma confinement by the radio frequency
   electromagnetic field in a toroidal device
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article
ID MAGNETIC-FIELD; SUPERCONDUCTING CAVITIES; ACCELERATORS; PENETRATION;
   FILAMENT; PINCH
AB Stability analysis of a recently proposed (Svidzinski 2007 Phys. Plasmas 14 102512) plasma confinement concept is performed. A separate calculation of the equilibrium profile of the plasma boundary supported by a circularly polarized electromagnetic field is made in collisionless two fluid and kinetic models in slab geometry. In this concept unmagnetized plasma is confined by electromagnetic pressure of the radio frequency (rf) field in toroidal geometry with the confining field frequency in the lower range such that the size of the device is much smaller than the vacuum wavelength. The confining magnetic field is generated by currents in the toroidal shell and by image currents on the plasma surface which are driven by ac voltages applied to toroidal and poloidal gaps in the shell. In the present stability analysis toroidal geometry is approximated by a periodic cylinder, it is assumed that plasma is a perfectly conducting fluid and that there is a vacuum layer between the plasma boundary and conducting shell. In this model a dispersion equation for plasma oscillations near equilibrium is derived. A general stability criterion is calculated when plasma is confined by an elliptically polarized rf field. For an elliptically polarized field stable plasma equilibria can be realized under nonrestrictive conditions for a wide range of ellipticity parameters. In particular, for circular polarization the equilibrium is stable when a greater than or similar to 0.6b, where a is the plasma radius and b is the radius of the cylinder. When plasma is confined by a linearly polarized field its equilibrium is in general unstable. Stable equilibria can also be realized when polarization of the confining field is a superposition of elliptical and linear polarizations. Conclusions about plasma stability under nonrestrictive conditions are expected to be valid in toroidal geometry from the physics consideration of the stabilizing mechanism. The up-to-date studies of the proposed plasma confinement concept indicate that this concept can result in a practical plasma confinement device.
C1 [Svidzinski, Vladimir A.] Univ Wisconsin, Madison, WI 53706 USA.
   [Svidzinski, Vladimir A.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Svidzinski, VA (reprint author), Univ Wisconsin, Madison, WI 53706 USA.
NR 41
TC 1
Z9 1
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0741-3335
EI 1361-6587
J9 PLASMA PHYS CONTR F
JI Plasma Phys. Control. Fusion
PD AUG
PY 2008
VL 50
IS 8
AR 085017
DI 10.1088/0741-3335/50/8/085017
PG 17
WC Physics, Fluids & Plasmas
SC Physics
GA 321SG
UT WOS:000257326200018
ER

PT J
AU Wu, HC
   Anders, A
AF Wu, Hongchen
   Anders, Andre
TI Measurements of the asymmetric dynamic sheath around a pulse biased
   sphere immersed in flowing metal plasma
SO PLASMA SOURCES SCIENCE & TECHNOLOGY
LA English
DT Article
ID SOURCE ION-IMPLANTATION; MAGNETIC STORAGE TECHNOLOGY; AMORPHOUS-CARBON
   FILMS; CATHODIC ARC PLASMA; HIGH-ASPECT-RATIO; VACUUM-ARC; SURFACE
   MODIFICATION; MATRIX SHEATH; DEPOSITION; MODEL
AB A long-probe technique was utilized to record the expansion and retreat of the dynamic sheath around a spherical substrate immersed in pulsed cathode arc metal plasma. Positively biased, long cylindrical probes were placed on the side and downstream of a negatively pulsed biased stainless steel sphere of 1 in. (25.4 mm) diameter. The amplitude and width of the negative high voltage pulses (HVPs) were 2 kV, 5 kV, 10 kV, and 2 mu s, 4 mu s, 10 mu s, respectively. The variation of the probe (electron) current during the HVP is a direct measure for the sheath expansion and retreat. Maximum sheath sizes were determined for the different parameters of the HVP. The expected rarefaction zone behind the biased sphere (wake) due to the fast plasma flow was clearly established and quantified.
C1 [Wu, Hongchen] Dalian Univ Technol, Dept Phys, Dalian 116024, Peoples R China.
   [Wu, Hongchen] Beijing Aeronaut Mfg Technol Res Inst, Beijing 100024, Peoples R China.
   [Wu, Hongchen; Anders, Andre] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Wu, HC (reprint author), Dalian Univ Technol, Dept Phys, Dalian 116024, Peoples R China.
RI Anders, Andre/B-8580-2009
OI Anders, Andre/0000-0002-5313-6505
NR 47
TC 2
Z9 2
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0963-0252
J9 PLASMA SOURCES SCI T
JI Plasma Sources Sci. Technol.
PD AUG
PY 2008
VL 17
IS 3
AR 035030
DI 10.1088/0963-0252/17/3/035030
PG 6
WC Physics, Fluids & Plasmas
SC Physics
GA 333HV
UT WOS:000258144500031
ER

PT J
AU Krishnan, VV
   Lau, EY
   Yamada, J
   Denning, DP
   Patel, SS
   Colvin, ME
   Rexach, MF
AF Krishnan, V. V.
   Lau, Edmond Y.
   Yamada, Justin
   Denning, Daniel P.
   Patel, Samir S.
   Colvin, Michael E.
   Rexach, Michael F.
TI Intramolecular Cohesion of Coils Mediated by Phenylalanine-Glycine
   Motifs in the Natively Unfolded Domain of a Nucleoporin
SO PLOS COMPUTATIONAL BIOLOGY
LA English
DT Article
ID NUCLEAR-PORE COMPLEX; INTRINSICALLY UNSTRUCTURED PROTEINS; HYDROPHOBIC
   CLUSTER-ANALYSIS; RESIDUAL DIPOLAR COUPLINGS; STRUCTURE PREDICTION;
   PROTEOMIC ANALYSIS; NMR-SPECTROSCOPY; REPEAT REGIONS; TRANSPORT; MODEL
AB The nuclear pore complex (NPC) provides the sole aqueous conduit for macromolecular exchange between the nucleus and the cytoplasm of cells. Its diffusion conduit contains a size-selective gate formed by a family of NPC proteins that feature large, natively unfolded domains with phenylalanine-glycine repeats (FG domains). These domains of nucleoporins play key roles in establishing the NPC permeability barrier, but little is known about their dynamic structure. Here we used molecular modeling and biophysical techniques to characterize the dynamic ensemble of structures of a representative FG domain from the yeast nucleoporin Nup116. The results showed that its FG motifs function as intramolecular cohesion elements that impart order to the FG domain and compact its ensemble of structures into native premolten globular configurations. At the NPC, the FG motifs of nucleoporins may exert this cohesive effect intermolecularly as well as intramolecularly to form a malleable yet cohesive quaternary structure composed of highly flexible polypeptide chains. Dynamic shifts in the equilibrium or competition between intra-and intermolecular FG motif interactions could facilitate the rapid and reversible structural transitions at the NPC conduit needed to accommodate passing karyopherin-cargo complexes of various shapes and sizes while simultaneously maintaining a size-selective gate against protein diffusion.
C1 [Krishnan, V. V.] Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA.
   [Krishnan, V. V.; Yamada, Justin; Patel, Samir S.; Rexach, Michael F.] Univ Calif Santa Cruz, Dept Mol Cell & Dev Biol, Santa Cruz, CA 95064 USA.
   [Krishnan, V. V.] Calif State Univ Fresno, Dept Chem, Fresno, CA 93740 USA.
   [Lau, Edmond Y.] Lawrence Livermore Natl Lab, Chem Mat Earth & Life Sci Directorate, Livermore, CA USA.
   [Denning, Daniel P.] MIT, Dept Biol, Cambridge, MA USA.
   [Colvin, Michael E.] Univ Calif Merced, Sch Nat Sci, Ctr Computat Biol, Merced, CA USA.
RP Krishnan, VV (reprint author), Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA.
EM rexach@biology.ucsc.edu
RI Krishnan, Krish/A-6859-2010
FU NIH [GM061900, GM077520]; United States Department of Energy; University
   of California Lawrence Livermore National Laboratory [W-7405-ENG-48.];
   U.S. Department of Energy, Office of Science, Offices of Advanced
   Scientific Computing Research, and Biological & Environmental Research;
   University of California Merced Center for Computational Biology
FX This work was supported in part by NIH Grant #GM061900 and #GM077520
   awarded to MR. This work was also performed in part under the auspices
   of the United States Department of Energy through the University of
   California Lawrence Livermore National Laboratory under contract number
   W-7405-ENG-48. This work was also supported in part by the U.S.
   Department of Energy, Office of Science, Offices of Advanced Scientific
   Computing Research, and Biological & Environmental Research through the
   University of California Merced Center for Computational Biology. These
   sponsors or funders had no role in the design and conduct of this study,
   or in the collection, analysis, and interpretation of the data, or in
   the prepartaion, review, or approval of the manuscript.
NR 64
TC 28
Z9 28
U1 0
U2 9
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1553-734X
EI 1553-7358
J9 PLOS COMPUT BIOL
JI PLoS Comput. Biol.
PD AUG
PY 2008
VL 4
IS 8
AR e1000145
DI 10.1371/journal.pcbi.1000145
PG 13
WC Biochemical Research Methods; Mathematical & Computational Biology
SC Biochemistry & Molecular Biology; Mathematical & Computational Biology
GA 360EX
UT WOS:000260041300030
PM 18688269
ER

PT J
AU Taylor, RC
   Acquaah-Mensah, G
   Singhal, M
   Malhotra, D
   Biswal, S
AF Taylor, Ronald C.
   Acquaah-Mensah, George
   Singhal, Mudita
   Malhotra, Deepti
   Biswal, Shyam
TI Network Inference Algorithms Elucidate Nrf2 Regulation of Mouse Lung
   Oxidative Stress
SO PLOS COMPUTATIONAL BIOLOGY
LA English
DT Article
ID ANTIOXIDANT RESPONSE ELEMENT; GENE-EXPRESSION; MEDIATED EXPRESSION;
   PROTEIN; DJ-1; GLUTATHIONYLATION; ACTIVATION; DISEASES; ALS2;
   DEGENERATION
AB A variety of cardiovascular, neurological, and neoplastic conditions have been associated with oxidative stress, i.e., conditions under which levels of reactive oxygen species (ROS) are elevated over significant periods. Nuclear factor erythroid 2-related factor (Nrf2) regulates the transcription of several gene products involved in the protective response to oxidative stress. The transcriptional regulatory and signaling relationships linking gene products involved in the response to oxidative stress are, currently, only partially resolved. Microarray data constitute RNA abundance measures representing gene expression patterns. In some cases, these patterns can identify the molecular interactions of gene products. They can be, in effect, proxies for protein-protein and protein-DNA interactions. Traditional techniques used for clustering coregulated genes on high-throughput gene arrays are rarely capable of distinguishing between direct transcriptional regulatory interactions and indirect ones. In this study, newly developed information-theoretic algorithms that employ the concept of mutual information were used: the Algorithm for the Reconstruction of Accurate Cellular Networks (ARACNE), and Context Likelihood of Relatedness (CLR). These algorithms captured dependencies in the gene expression profiles of the mouse lung, allowing the regulatory effect of Nrf2 in response to oxidative stress to be determined more precisely. In addition, a characterization of promoter sequences of Nrf2 regulatory targets was conducted using a Support Vector Machine classification algorithm to corroborate ARACNE and CLR predictions. Inferred networks were analyzed, compared, and integrated using the Collective Analysis of Biological Interaction Networks (CABIN) plug-in of Cytoscape. Using the two network inference algorithms and one machine learning algorithm, a number of both previously known and novel targets of Nrf2 transcriptional activation were identified. Genes predicted as novel Nrf2 targets include Atf1, Srxn1, Prnp, Sod2, Als2, Nfkbib, and Ppp1r15b. Furthermore, microarray and quantitative RT-PCR experiments following cigarette-smoke-induced oxidative stress in Nrf2(+/+) and Nrf2(-/-) mouse lung affirmed many of the predictions made. Several new potential feed-forward regulatory loops involving Nrf2, Nqo1, Srxn1, Prdx1, Als2, Atf1, Sod1, and Park7 were predicted. This work shows the promise of network inference algorithms operating on high-throughput gene expression data in identifying transcriptional regulatory and other signaling relationships implicated in mammalian disease.
C1 [Taylor, Ronald C.; Singhal, Mudita] US DOE, Computat Biol & Bioinformat Grp, Pacific NW Natl Lab, Richland, WA USA.
   [Acquaah-Mensah, George] Massachusetts Coll Pharm & Hlth Sci, Dept Pharmaceut Sci, Worcester, MA USA.
   [Malhotra, Deepti; Biswal, Shyam] Johns Hopkins Univ, Dept Environm Hlth Sci, Bloomberg Sch Publ Hlth, Baltimore, MD 21205 USA.
RP Taylor, RC (reprint author), US DOE, Computat Biol & Bioinformat Grp, Pacific NW Natl Lab, Richland, WA USA.
EM ronald.taylor24@gmail.com
OI Acquaah-Mensah, George/0000-0003-3984-8327; Mensah,
   George/0000-0002-0387-5326; Taylor, Ronald/0000-0001-9777-9767
FU US Department of Energy (DOE) [DE-AC05-76RL01830]; EMSL Grand Challenge
   in Membrane Biology project; Oak Ridge National Laboratory/PNNL
   Microbial Protein-Protein Interactions [43930]; National Institutes of
   Health [HL081205, GM079239, P50HL084945]; Flight Attendant Medical
   Research Institute; National Institute of Environmental Health Sciences
   (NIEHS) Children Asthma Cente [50ES-06-001]
FX The development of the SEBINI network inference software platform was
   supported by the US Department of Energy (DOE) through the Biomolecular
   Systems Initiative at the Pacific Northwest National Laboratory (PNNL),
   and also through the William R. Wiley Environmental Molecular Science
   Laboratory (EMSL) at PNNL, operated by Battelle for the US DOE under
   contract DE-AC05-76RL01830. Also, SEBINI development has been supported
   by the EMSL Grand Challenge in Membrane Biology project, via PNNL's
   Laboratory Directed Research and Development Program. Also, work for
   SEBINI and CABIN has been supported by the joint Oak Ridge National
   Laboratory/PNNL Microbial Protein-Protein Interactions project for the
   Genomes to Life Center for Molecular and Cellular Biology, project
   #43930, US DOE. SB is partly supported by National Institutes of Health
   grants HL081205, GM079239, and P50HL084945, National Institute of
   Environmental Health Sciences (NIEHS) Children Asthma Center Grant
   50ES-06-001, and a research grant from the Flight Attendant Medical
   Research Institute. The microarray data was generated in the microarray
   core facility of NIEHS center P30 ES 03819. These studies have been
   facilitated by resources of the Massachusetts College of Pharmacy and
   Health Sciences.
NR 60
TC 48
Z9 48
U1 0
U2 3
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 AUG
PY 2008
VL 4
IS 8
AR e1000166
DI 10.1371/journal.pcbi.1000166
PG 15
WC Biochemical Research Methods; Mathematical & Computational Biology
SC Biochemistry & Molecular Biology; Mathematical & Computational Biology
GA 360EX
UT WOS:000260041300011
PM 18769717
ER

PT J
AU Blair, MW
   Muenchausen, RE
   Taylor, RD
   Labouriau, A
   Cooke, DW
   Stephens, TS
AF Blair, M. W.
   Muenchausen, R. E.
   Taylor, R. D.
   Labouriau, A.
   Cooke, D. W.
   Stephens, T. S.
TI EPR and Mossbauer characterization of RTV polysiloxane foams and their
   constituents
SO POLYMER DEGRADATION AND STABILITY
LA English
DT Article
DE EPR; Mossbauer; RTV foams; aging mechanisms
ID SILICONE FOAM; POLYDIMETHYLSILOXANE; LEPIDOCROCITE
AB We have used electron paramagnetic resonance (EPR) and Fe-57 Mossbauer spectroscopies to investigate potential aging mechanisms in filled RTV polysiloxane foams, diatomaceous earth, and their other constituents. Intense, broad EPR resonances in the RTV foams were recorded at room temperature as a function of microwave power. These signals were shown to come from the diatomaceous earth filler (Celite (R) 350) in the RTV foams. Fe-57 Mossbauer measurements for neat Celite (R) 350 showed the presence of iron compounds in the form of lepidocrocite. Further EPR measurements showed that the intense, broad signals from Celite (R) 350 and the RTV foams were due to lepidocrocite that has been annealed to 175 degrees C and is in an excited state. EPR measurements of annealed samples of Celite (R) 350 also indicated that structural (chemisorbed) water is not easily released by the lepidocrocite. Therefore, the presence of intermediate forms of iron oxides in Celite (R) 350 and RTV foams indicates that water is not active in these materials. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Blair, M. W.] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
   [Muenchausen, R. E.; Labouriau, A.; Cooke, D. W.] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
   [Taylor, R. D.] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA.
   [Stephens, T. S.] Los Alamos Natl Lab, Weap Engn Technol Div, Los Alamos, NM 87545 USA.
RP Blair, MW (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, MS J495, Los Alamos, NM 87545 USA.
EM mblair@lanl.gov
RI Stephens, Thomas/D-9512-2012; 
OI Labouriau, Andrea/0000-0001-8033-9132
NR 13
TC 9
Z9 9
U1 2
U2 16
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 AUG
PY 2008
VL 93
IS 8
BP 1585
EP 1589
DI 10.1016/j.polymdegradstab.2008.04.014
PG 5
WC Polymer Science
SC Polymer Science
GA 350YD
UT WOS:000259388900024
ER

PT J
AU Green, MA
   Emery, K
   Hishikawa, Y
   Warta, W
AF Green, Martin A.
   Emery, Keith
   Hishikawa, Yoshihiro
   Warta, Wilhelm
TI Solar cell efficiency tables (version 32)
SO PROGRESS IN PHOTOVOLTAICS
LA English
DT Article
DE solar cell efficiency; photovoltaic efficiency; energy conversion
   efficiency
ID 20-PERCENT EFFICIENCY; LARGE-AREA; MULTICRYSTALLINE
AB Consolidated tables showing an extensive listing of the highest independently confirmed efficiencies for solar cells and modules are presented. Guidelines for inclusion of results into these tables are outlined and new entries since January 2008 are reviewed. Copyright (C) 2008 John Wiley & Sons, Ltd.
C1 [Green, Martin A.] Univ New S Wales, ARC Photovolta Ctr Excellence, Sydney, NSW 2052, Australia.
   [Emery, Keith] Natl Renewable Energy Lab, Golden, CO 80401 USA.
   [Hishikawa, Yoshihiro] Natl Inst Adv Ind Sci & Technol, Res Ctr Photovolta RCPV, Tsukuba, Ibaraki, Japan.
   [Warta, Wilhelm] Fraunhofer Inst Solar Energy Syst, Dept Solar Cells Mat & Technol, D-79110 Freiburg, Germany.
RP Green, MA (reprint author), Univ New S Wales, ARC Photovolta Ctr Excellence, Sydney, NSW 2052, Australia.
EM m.green@unsw.edu.au
NR 49
TC 65
Z9 69
U1 3
U2 26
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1062-7995
J9 PROG PHOTOVOLTAICS
JI Prog. Photovoltaics
PD AUG
PY 2008
VL 16
IS 5
BP 435
EP 440
DI 10.1002/pip.842
PG 6
WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied
SC Energy & Fuels; Materials Science; Physics
GA 339OH
UT WOS:000258586400007
ER

PT J
AU Stevens, LL
   Velisavljevic, N
   Hooks, DE
   Dattelbaum, DM
AF Stevens, Lewis L.
   Velisavljevic, Nenad
   Hooks, Daniel E.
   Dattelbaum, Dana M.
TI Hydrostatic compression curve for triamino-trinitrobenzene determined to
   13.0 GPa with powder X-ray diffraction
SO PROPELLANTS EXPLOSIVES PYROTECHNICS
LA English
DT Article
DE equation of state; hydrostatic compression; insensitive high explosive;
   TATB; X-ray diffraction
ID TRANSIENT HIGH-PRESSURE; SHOCK WAVE COMPRESSION; CRYSTAL-STRUCTURE;
   RAMAN-SCATTERING; 1,3,5-TRIAMINO-2,4,6-TRINITROBENZENE; STATE;
   TRIAMINOTRINITROBENZENE; ANTHRACENE; HUGONIOT; EQUATION
AB Using powder X-ray diffraction in conjunction with a diamond anvil cell (DAC), the unit cell volume of triamino-trinitrobenzene (TATB) has been measured from ambient pressure to 13 GPa. The resultant isotherm is compared with previous theoretical (Byrd and Rice and Pastine and Bernecker) and experimental (Olinger and Cady) works. While all reports are consistent to approximately 2 GPa, our measurements reveal a slightly stiffer TATB material that reported by Olinger and Cady and an intermediate compressibility compared with the isotherms predicted by the two theroretical works. Analysis of the room temperature isotherm using the semi-empirical, Murnagham, Birch-Murnaghan, and Vinet equations of state (EOS) provided a determination of the isothermal bulk modulus (K-n) and its pressure-derivative (K-a') for TATB. From these fits to our P-V isotherm, from ambient pressure to 8 GPa, the average results for the zero-pressure bulk modulus and its pressure derivative were found to be 14.7 GPa and 10.1, respectively. For comparison to shock experiments on pressed TATB powder and its plastic-bonded formulation PBX 9502 (95% TATB, 5% Kel-F 800), the isotherm was transformed to the pseudo-velocity U-s - u(p) plane using the Rankie - Hugoniot jump conditions. This analysis provides an extrapolated bulk sound speed, c(o) = 1.70 km s(-1), for TATB and its agreement with a previous determination (c(o) = 1.43 km s(-1)) is discussed. Furthermore, our P-V and corresponding U-s - u(p) curves reveal a subtle cusp at approximately 8 GPa. This cusp is discussed in relation to similar observations made for the aromatic hydrocarbons anthracene, benzene and toluene, graphite, and trinitrotoluene (TNT).
C1 [Stevens, Lewis L.; Velisavljevic, Nenad; Hooks, Daniel E.; Dattelbaum, Dana M.] Los Alamos Natl Lab, Dynam & Energet Mat Div, Los Alamos, NM 87545 USA.
RP Dattelbaum, DM (reprint author), Los Alamos Natl Lab, Dynam & Energet Mat Div, POB 1663, Los Alamos, NM 87545 USA.
EM danadat@lanl.gov
FU DOE/NNSA Science Campaign 2; DOE-BES; DOE-NNSA; NSF; DOD-TACOM; W. M.
   Keck Foundation
FX Los Alamos National Laboratory is operated by Los Alamos National
   Security (LANS), LLC for the Department of Energy and the National
   Nuclear Safety Administration. Support for this research was provided by
   DOE/NNSA Science Campaign 2 under the HE Science Program. Use of the
   HCAT facility is supported by DOE-BES, DOE-NNSA, NSF, DOD-TACOM and the
   W. M. Keck Foundation. HPCAT is a collaboration among the Carnegie
   Institution, Lawrence Livermore National Laboratory, the University of
   Hawaii, the University of Nevada-Las Vegas, and the Carnegic/DOE
   Alliance Center (CDAC). We thank the HPCAT staff, and particularly
   Hans-Peter Liermann, Haozhe Lin, Paul Chow, and Maddury Somayazulu for
   technical assistance with our experiments. We also thank Rick Gustavsen
   for helpful discussions. Ernie Hartline for assistance in TATB crystal
   preparation, and Tariq Aslam for providing the motivation for this work.
NR 33
TC 43
Z9 44
U1 1
U2 22
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0721-3115
J9 PROPELL EXPLOS PYROT
JI Propellants Explos. Pyrotech.
PD AUG
PY 2008
VL 33
IS 4
BP 286
EP 295
DI 10.1002/prep.200700270
PG 10
WC Chemistry, Applied; Engineering, Chemical
SC Chemistry; Engineering
GA 340XG
UT WOS:000258677700007
ER

PT J
AU Rawat, R
   Ahmed, SA
   Swaminathan, S
AF Rawat, Richa
   Ahmed, S. Ashraf
   Swaminathan, Subramanyam
TI High level expression of the light chain of botulinum neurotoxin
   serotype C1 and an efficient HPLC assay to monitor its proteolytic
   activity
SO PROTEIN EXPRESSION AND PURIFICATION
LA English
DT Article
DE botulinum neurotoxin; cloning; catalytic activity; substrate peptide;
   type C1
ID SUBSTRATE-SPECIFICITY; STRUCTURAL-ANALYSIS; A NEUROTOXIN; SNARE MOTIF;
   SNAP-25; PROTEIN; CLEAVAGE; TETANUS; RELEASE; INTACT
AB Botulinum neurotoxins (serotypes BoNT/A-BoNT/G) induce botulism, a disease leading to flaccid paralysis. These serotypes are highly specific in their proteolytic cleavage of SNAP-25 (synaptosomal-associated protein of 25 kDa), VAMP (vesicle associated membrane protein) or syntaxin. The catalytic domain (light chain, LC) of the neurotoxin has a Zn2+ dependent endopeptidase activity. In order to design drugs and inhibitors against these toxins, high level overexpression and characterization of LC of BoNTs along with the development of assays to monitor their proteolytic activity becomes important. Using the auto-induction method, we attained a high level expression of BoNT/C1(1-430) yielding more than 30 mg protein per 500 ml culture. We also developed an efficient assay to measure the activity of serotype C1 based on a HPLC method. SNAP-25 with varying peptide length has been reported in literature as substrates for BoNT/C1 proteolysis signifying the importance of remote exosites in BoNT/C1 required for activity. Here, we show that a 17-mer peptide corresponding to residues 187-203 of SNAP-25, which has earlier been shown to be a substrate for BoNT/A, can be used as a substrate for quantifying the activity of BoNT/C1 (1-430). There was no pH dependence for the proteolysis, however the presence of dithiothreitol is essential for the reaction. Although the 17-mer substrate bound 110-fold less tightly to BoNT/C1(1-430) than SNAP-25, the optimal assay conditions facilitated an increase in the catalytic efficiency of the enzyme by about 5-fold. (c) 2008 Elsevier Inc. All rights reserved.
C1 [Rawat, Richa; Swaminathan, Subramanyam] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
   [Ahmed, S. Ashraf] USA, Med Res Inst Infect Dis, Dept Mol Biol, Integrated Toxicol Div, Ft Detrick, MD 21702 USA.
RP Swaminathan, S (reprint author), Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
EM swami@bnl.gov
NR 28
TC 8
Z9 8
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 1046-5928
J9 PROTEIN EXPRES PURIF
JI Protein Expr. Purif.
PD AUG
PY 2008
VL 60
IS 2
BP 165
EP 169
DI 10.1016/j.pep.2008.03.010
PG 5
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
   Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA 331MO
UT WOS:000258016500011
PM 18482846
ER

PT J
AU Vuyisich, M
   Gnanakaran, S
   Lovchik, JA
   Lyons, CR
   Gupta, G
AF Vuyisich, Momchilo
   Gnanakaran, S.
   Lovchik, Julie A.
   Lyons, C. Rick
   Gupta, Goutam
TI A dual-purpose protein ligand for effective therapy and sensitive
   diagnosis of anthrax
SO PROTEIN JOURNAL
LA English
DT Article
DE anthrax; lethal toxins; bivalent protein chimera; therapy; detection
ID PROTECTIVE ANTIGEN; BACILLUS-ANTHRACIS; LETHAL TOXIN; SUPERANTIGEN
   PATHOGENESIS; MONOCLONAL-ANTIBODIES; CELLULAR RECEPTOR; BINDING;
   CHALLENGE; BIOTERRORISM; MACROPHAGES
AB This article reports the design of a bivalent protein ligand with dual use in therapy and diagnosis of anthrax caused by Bacillus anthracis. The ligand specifically binds to PA and thereby blocks the intracellular delivery of LF and EF toxins that, respectively, cause cell lysis and edema. The ligand is a chimeric scaffold with two PA-binding domains (called VWA) linked to an IgG-Fc frame. Molecular modeling and binding measurements reveal that the VWA-Fc dimer binds to PA with high affinity (K-D = 0.2 nM). An in vitro bio-luminescence assay shows that VWA-Fc (at nanomolar concentration) protects mouse macrophages from lysis by PA/LF. In vivo studies demonstrate that VWA-Fc at low doses (similar to 50 mu g/animal) are able to rescue animals from lethal doses of PA/LF and B. anthracis spores. Finally, VWA-Fc is utilized as the capture molecule in the sensitive (down to 30 picomolar) detection of PA using surface plasmon resonance.
C1 [Vuyisich, Momchilo; Gupta, Goutam] Los Alamos Natl Lab, Biosci Div, Grp B 7, Los Alamos, NM 87545 USA.
   [Gnanakaran, S.] Los Alamos Natl Lab, Div Theory, Grp T 10, Los Alamos, NM 87545 USA.
   [Lovchik, Julie A.; Lyons, C. Rick] Univ New Mexico, Hlth Sci Ctr, Ctr Infect Dis & Immun, Albuquerque, NM 87131 USA.
RP Gupta, G (reprint author), Los Alamos Natl Lab, Biosci Div, Grp B 7, Los Alamos, NM 87545 USA.
EM gxg@lanl.gov
OI Gnanakaran, S/0000-0002-9368-3044
FU Department of Central Intelligence (DCI); DOE Laboratory Directed
   Research Development Programs; NIAID [N01-AI40095]
FX We thank Rita Svensson for sequencing, Jim Freyer and Claire Sanders for
   cell culture facilities, Peter Pavlik for the use of FPLC, Elizabeth
   Hong-Geller for plate reader. We wish to thank Dr. Janet Dorigan (DCI)
   for her support. Grant Support: We acknowledge funding from the
   Department of Central Intelligence (DCI) and the DOE Laboratory Directed
   Research Development Programs. Animal studies were funded by NIAID,
   contract N01-AI40095.
NR 38
TC 11
Z9 11
U1 0
U2 7
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1572-3887
J9 PROTEIN J
JI Protein J.
PD AUG
PY 2008
VL 27
IS 5
BP 292
EP 302
DI 10.1007/s10930-008-9137-0
PG 11
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 345PT
UT WOS:000259009400004
PM 18649128
ER

PT J
AU Bergh, M
   Huldt, G
   Timneanu, N
   Maia, FRNC
   Hajdu, J
AF Bergh, Magnus
   Huldt, Gosta
   Timneanu, Nicusor
   Maia, Filipe R. N. C.
   Hajdu, Janos
TI Feasibility of imaging living cells at subnanometer resolutions by
   ultrafast X-ray diffraction
SO QUARTERLY REVIEWS OF BIOPHYSICS
LA English
DT Review
ID UNIFORMLY REDUNDANT ARRAYS; FREE-ELECTRON LASERS; CRYSTALLOGRAPHY;
   WAVELENGTH; MICROSCOPY; HOLOGRAPHY; RADIATION; BEAMS
AB Detailed structural investigations on living cells are problematic because existing structural methods cannot reach high resolutions on non-reproducible objects. Illumination with an ultrashort and extremely bright X-ray pulse can outrun key damage processes over a very short period. This can be exploited to extend the diffraction signal to the highest possible resolution in flash diffraction experiments. Here we present an analysis or the interaction of a very intense and very short X-ray pulse with a living cell, using a non-equilibrium population kinetics plasma code with radiation transfer. Each element in the evolving plasma is modeled by numerous states to monitor changes in the atomic populations as a function of pulse length, wavelength, and fluence. The model treats photoionization, impact ionization, Auger decay, recombination, and inverse bremsstrahlung by solving rate equations in a self-consistent manner and describes hydrodynamic expansion through the ion sound speed, The results show that subnanometer resolutions could be reached on micron-sized cells in a diffraction-limited geometry at wavelengths between 0.75 and 1.5 nm and at fluences of 10(11)-10(12) photonS mu M (2) in less than 10 fs. Subnanometer resolutions could also be achieved with harder X-rays at higher fluences. We discuss experimental and computational strategies to obtain depth information about the object in flash diffraction experiments.
C1 [Bergh, Magnus; Huldt, Gosta; Timneanu, Nicusor; Maia, Filipe R. N. C.; Hajdu, Janos] Uppsala Univ, Inst Cell & Mol Biol, Lab Mol Biophys, S-75124 Uppsala, Sweden.
   [Hajdu, Janos] Stanford Linear Accelerator Ctr, Menlo Pk, CA USA.
RP Hajdu, J (reprint author), Uppsala Univ, Inst Cell & Mol Biol, Lab Mol Biophys, Box 596, S-75124 Uppsala, Sweden.
EM janos@xray.bmc.uu.se
RI Timneanu, Nicusor/C-7691-2012; Rocha Neves Couto Maia,
   Filipe/C-3146-2014
OI Timneanu, Nicusor/0000-0001-7328-0400; Rocha Neves Couto Maia,
   Filipe/0000-0002-2141-438X
FU US Department of Energy; Swedish Research Council
FX We are grateful to H. Scott (Lawrence Livermore National Laboratory) for
   his invaluable help with software development for plasma simulations. We
   thank M. Svenda (Uppsala), A. Szoke (Lawrence Livermore National
   Laboratory), R. A. London (Lawrence Livermore National Laboratory), and
   Keith A. Nugent (University of Melbourne) for discussions. This work was
   supported by the US Department of Energy through the Stanford Linear
   Accelerator Center by the DFG Cluster of Excellence at the Munich Centre
   for Advanced Photonics (www.munich-photonics.de) and by the Swedish
   Research Council through the Centre of Excellence in FEL-Studies at
   Uppsala University.
NR 32
TC 57
Z9 58
U1 5
U2 17
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0033-5835
EI 1469-8994
J9 Q REV BIOPHYS
JI Q. Rev. Biophys.
PD AUG-NOV
PY 2008
VL 41
IS 3-4
BP 181
EP 204
DI 10.1017/S003358350800471X
PG 24
WC Biophysics
SC Biophysics
GA 389MX
UT WOS:000262098500001
PM 19079804
ER

PT J
AU Seong, YB
   Owen, LA
   Bishop, MP
   Bush, A
   Clendon, P
   Copland, L
   Finkel, R
   Kamp, U
   Shroder, JF
AF Seong, Yeong Bae
   Owen, Lewis A.
   Bishop, Michael P.
   Bush, Andrew
   Clendon, Penny
   Copland, Luke
   Finkel, Robert
   Kamp, Ulrich
   Shroder, John F.
TI Quaternary glacier history of the Central Karakoram - Reply
SO QUATERNARY SCIENCE REVIEWS
LA English
DT Letter
ID EQUILIBRIUM-LINE ALTITUDES; MOUNT EVEREST; TIBETAN PLATEAU; HUNZA
   VALLEY; ICE-SHEET; GLACIATION; HIMALAYA; MORAINES; BE-10; SEDIMENTS
C1 [Seong, Yeong Bae; Owen, Lewis A.] Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA.
   [Bishop, Michael P.; Shroder, John F.] Univ Nebraska, Dept Geog & Geol, Omaha, NE 68182 USA.
   [Bush, Andrew] Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB T6G 2E3, Canada.
   [Clendon, Penny] Univ Canterbury, Dept Geog, Christchurch 1, New Zealand.
   [Copland, Luke] Univ Ottawa, Dept Geog, Ottawa, ON K1N 6N5, Canada.
   [Finkel, Robert] Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA.
   [Kamp, Ulrich] Univ Montana, Dept Geog, Missoula, MT 59812 USA.
RP Seong, YB (reprint author), Korea Univ, Dept Earth & Environm Sci, Seoul 136704, South Korea.
EM Lewis.Owen@uc.edu
NR 32
TC 11
Z9 11
U1 1
U2 6
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 AUG
PY 2008
VL 27
IS 15-16
BP 1656
EP 1658
DI 10.1016/j.quascirev.2008.04.016
PG 3
WC Geography, Physical; Geosciences, Multidisciplinary
SC Physical Geography; Geology
GA 345SW
UT WOS:000259017900014
ER

PT J
AU Kalinin, S
   Jesse, S
   Proksch, R
AF Kalinin, Sergei
   Jesse, Stephen
   Proksch, Roger
TI Information acquisition & processing in scanning probe microscopy
SO R&D MAGAZINE
LA English
DT Article
C1 [Kalinin, Sergei; Jesse, Stephen] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Kalinin, S (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RI Jesse, Stephen/D-3975-2016
OI Jesse, Stephen/0000-0002-1168-8483
NR 2
TC 2
Z9 2
U1 0
U2 2
PU REED BUSINESS INFORMATION
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010 USA
SN 0746-9179
J9 R&D MAG
JI R D Mag.
PD AUG
PY 2008
VL 50
IS 4
BP 20
EP +
PG 3
WC Engineering, Industrial; Multidisciplinary Sciences
SC Engineering; Science & Technology - Other Topics
GA 337LL
UT WOS:000258437500004
ER

PT J
AU Zeitlin, C
   Sihver, L
   La Tessa, C
   Mancusi, D
   Heilbronn, L
   Miller, J
   Guetersloh, SB
AF Zeitlin, C.
   Sihver, L.
   La Tessa, C.
   Mancusi, D.
   Heilbronn, L.
   Miller, J.
   Guetersloh, S. B.
TI Comparisons of fragmentation spectra using 1 GeV/amU Fe-56 data and the
   PHITS model
SO RADIATION MEASUREMENTS
LA English
DT Article
DE Galactic cosmic rays; Heavy ions; Shielding; Fragmentation; PHITS;
   Models; Monte Carlo
ID ACCURATE UNIVERSAL PARAMETERIZATION; ABSORPTION CROSS-SECTIONS;
   MEV/NUCLEON FE-56; SPACE EXPLORATION; RADIATION; PARTICLE; TARGETS;
   CODE; IONS
AB We present measurements and model calculations of fluence and linear energy transfer in water (LET infinity) obtained using Fe-56 beams with 1 GeV/amu kinetic energy incident on aluminum, polyethylene, PMMA, and lead targets. The measured spectra are compared to predictions of the PHITS model. The study is motivated by NASA's need to develop accurate heavy ion transport codes to assess radiation exposures in deep space, where galactic cosmic rays are important. The data were obtained at the Alternating Gradient Synchrotron at the Brookhaven National Laboratory. Distributions of charge and LET depend on the depth and composition of the target. Several of the targets studied are "thick", defined operationally as a depth that presents at least 50% of an interaction length to the beam ions. In a thick target, the probability of a secondary interaction is significant, tertiary interactions can also be important, and the target-exit fluence and charge distributions depend on unmeasured cross sections that can only be estimated by nuclear interaction models. Comparisons between calculated and measured spectra are therefore of considerable interest. Some targets used in the study are thin, so that secondary and higher interaction probabilities are negligible, allowing more stringent comparisons between the data and the model. We find that PHITS reproduces some aspects of the experimental data well, but fails to accurately reproduce many of the measured fragment fluences. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Zeitlin, C.; Heilbronn, L.; Miller, J.; Guetersloh, S. B.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [Sihver, L.; La Tessa, C.; Mancusi, D.] Chalmers, SE-41296 Gothenburg, Sweden.
   [Sihver, L.] Roanoke Coll, Salem, VA 24153 USA.
RP Zeitlin, C (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM cjzeitlin@lbl.gov
RI Heilbronn, Lawrence/J-6998-2013; 
OI Heilbronn, Lawrence/0000-0002-8226-1057; Mancusi,
   Davide/0000-0002-2518-8228
NR 29
TC 7
Z9 10
U1 0
U2 4
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1350-4487
J9 RADIAT MEAS
JI Radiat. Meas.
PD AUG
PY 2008
VL 43
IS 7
BP 1242
EP 1253
DI 10.1016/j.radmeas.2008.02.013
PG 12
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 345SV
UT WOS:000259017800010
ER

PT J
AU Miller, G
   Melo, D
   Martz, H
   Bertelli, L
AF Miller, G.
   Melo, D.
   Martz, H.
   Bertelli, L.
TI AN EMPIRICAL MULTIVARIATE LOG-NORMAL DISTRIBUTION REPRESENTING
   UNCERTAINTY OF BIOKINETIC PARAMETERS FOR Cs-137
SO RADIATION PROTECTION DOSIMETRY
LA English
DT Article
AB A simplified biokinetic model for Cs-137 has six parameters representing transfer of material to and from various compartments. Using a Bayesian analysis, the joint probability distribution of these six parameters is determined empirically for two cases with quite a lot of bioassay data. The distribution is found to be a multivariate log-normal. Correlations between different parameters are obtained. The method utilises a fairly large number of pre-determined forward biokinetic calculations, whose results are stored in interpolation tables. Four different methods to sample the multidimensional parameter space with a limited number of samples are investigated: random, stratified, Latin Hypercube sampling with a uniform distribution of parameters and importance sampling using a lognormal distribution that approximates the posterior distribution. The importance sampling method gives much smaller sampling uncertainty. No sampling method-dependent differences are perceptible for the uniform distribution methods.
C1 [Miller, G.; Martz, H.; Bertelli, L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Melo, D.] NCI, Bethesda, MD 20892 USA.
RP Miller, G (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM guthriemiller@gmail.com
FU Los Alamos National Laboratory/US Department of Energy
FX This work was funded in part by Los Alamos National Laboratory/US
   Department of Energy.
NR 12
TC 4
Z9 4
U1 1
U2 2
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0144-8420
J9 RADIAT PROT DOSIM
JI Radiat. Prot. Dosim.
PD AUG
PY 2008
VL 131
IS 2
BP 198
EP 211
DI 10.1093/rpd/ncn131
PG 14
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 373PL
UT WOS:000260984100006
PM 18420573
ER

PT J
AU Sallach, DL
AF Sallach, David L.
TI Modeling emotional dynamics: Currency versus field
SO RATIONALITY AND SOCIETY
LA English
DT Article
DE emotional energy; social field; collective orientation; cultural
   dynamics; discourse community
ID SCIENCE
AB Randall Collins has introduced a simplified model of emotional dynamics in which emotional energy, heightened and focused by interaction rituals, serves as a common denominator for social exchange: a generic form of currency, except that it is active in a far broader range of social transactions. While the scope of this theory is attractive, the specifics of the model remain unconvincing.
   After a critical assessment of the currency theory of emotion, a field model of emotion is introduced that adds expressiveness by locating emotional valence within its cognitive context, thereby creating an integrated orientation field. The result is a model which claims less in the way of motivational specificity, but is more satisfactory in modeling the dynamic interaction between cognitive and emotional orientations at both individual and social levels.
C1 Argonne Natl Lab, Ctr Complex Adapt Agent Syst Simulat, Argonne, IL 60439 USA.
RP Sallach, DL (reprint author), Argonne Natl Lab, Ctr Complex Adapt Agent Syst Simulat, 9700 S Cass Ave,Bldg 900, Argonne, IL 60439 USA.
EM sallach@anl.gov
NR 91
TC 2
Z9 2
U1 1
U2 3
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 1043-4631
J9 RATION SOC
JI Ration. Soc.
PD AUG
PY 2008
VL 20
IS 3
BP 343
EP 365
DI 10.1177/1043463108092532
PG 23
WC Sociology
SC Sociology
GA 336LB
UT WOS:000258364200004
ER

PT J
AU Smith, C
   Knudsen, J
   Kvarfordt, K
   Wood, T
AF Smith, Curtis
   Knudsen, James
   Kvarfordt, Kellie
   Wood, Ted
TI Key attributes of the SAPHIRE risk and reliability analysis software for
   risk-informed probabilistic applications
SO RELIABILITY ENGINEERING & SYSTEM SAFETY
LA English
DT Article
DE risk-informed; PRA; PSA; probability; risk assessment; safety;
   reliability; software; SAPHIRE; analysis
AB The Idaho National Laboratory is a primary developer of probabilistic risk and reliability analysis (PRRA) tools, dating back over 35 years. Evolving from mainframe-based software, the current state-of-the-practice has led to the creation of the SAPHIRE software. Currently, agencies such as the Nuclear Regulatory Commission, the National Aeronautics and Aerospace Agency, the Department of Energy, and the Department of Defense use version 7 of the SAPHIRE software for many of their risk-informed activities. In order to better understand and appreciate the power of software as part of risk-informed applications, we need to recall that our current analysis methods and solution methods have built upon pioneering work done 30-40 years ago. We contrast this work with the current capabilities in the SAPHIRE analysis package. As part of this discussion, we provide information for both the typical features and special analysis capabilities, which are available. We also present the application and results typically found with state-of-the-practice PRRA models. By providing both a high-level and detailed look at the SAPHIRE software, we give a snapshot in time for the current use of software tools in a risk-informed decision arena. (c) 2007 Elsevier Ltd. All rights reserved.
C1 [Smith, Curtis; Knudsen, James; Kvarfordt, Kellie; Wood, Ted] EG&G Idaho Inc, Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA.
RP Smith, C (reprint author), EG&G Idaho Inc, Idaho Natl Engn Lab, POB 1625, Idaho Falls, ID 83415 USA.
EM Curtis.Smith@inl.gov
NR 13
TC 8
Z9 8
U1 1
U2 2
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0951-8320
J9 RELIAB ENG SYST SAFE
JI Reliab. Eng. Syst. Saf.
PD AUG
PY 2008
VL 93
IS 8
BP 1151
EP 1164
DI 10.1016/j.ress.2007.08.005
PG 14
WC Engineering, Industrial; Operations Research & Management Science
SC Engineering; Operations Research & Management Science
GA 294SS
UT WOS:000255426600006
ER

PT J
AU Graves, TL
   Hamada, MS
   Klamann, RM
   Koehler, AC
   Martz, HF
AF Graves, T. L.
   Hamada, M. S.
   Klamann, R. M.
   Koehler, A. C.
   Martz, H. F.
TI Using simultaneous higher-level and partial lower-level data in
   reliability assessments
SO RELIABILITY ENGINEERING & SYSTEM SAFETY
LA English
DT Article
DE Bayesian methods; generalized cut sets; Markov chain Monte Carlo;
   simultaneous multi-level data; success/failure data
ID BINOMIAL SUBSYSTEMS; COMPONENTS; SYSTEMS
AB When a system is tested, besides system data, some lower-level data may become available such as a particular subsystem or component was successful or failed. Treating such simultaneous multi-level data as independent is a mistake because they are dependent. In this paper, we show how to handle simultaneous multi-level data correctly in a reliability assessment. We do this by determining what information the simultaneous data provides in terms of the component reliabilities using generalized cut sets. We illustrate this methodology with an example of a low-pressure coolant injection system using a Bayesian approach to make reliability assessments. Published by Elsevier Ltd.
C1 [Graves, T. L.; Hamada, M. S.; Klamann, R. M.; Koehler, A. C.; Martz, H. F.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Hamada, MS (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM haimada@lanl.gov
NR 12
TC 21
Z9 22
U1 1
U2 1
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0951-8320
J9 RELIAB ENG SYST SAFE
JI Reliab. Eng. Syst. Saf.
PD AUG
PY 2008
VL 93
IS 8
BP 1273
EP 1279
DI 10.1016/j.ress.2007.07.002
PG 7
WC Engineering, Industrial; Operations Research & Management Science
SC Engineering; Operations Research & Management Science
GA 294SS
UT WOS:000255426600016
ER

PT J
AU Tao, F
   Tang, D
   Salmeron, M
   Somorjai, GA
AF Tao, Feng
   Tang, David
   Salmeron, Miquel
   Somorjai, Gabor A.
TI A new scanning tunneling microscope reactor used for high-pressure and
   high-temperature catalysis studies
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID SURFACE
AB We present the design and performance of a homebuilt high-pressure and high-temperature reactor equipped with a high-resolution scanning tunneling microscope (STM) for catalytic studies. In this design, the STM body, sample, and tip are placed in a small high pressure reactor (similar to 19 cm(3)) located within an ultrahigh vacuum (UHV) chamber. A scalable port on the wall of the reactor separates the high pressure environment in the reactor from the vacuum environment of the STM chamber and permits sample transfer and tip change in UHV. A combination of a sample transfer arm, wobble stick, and sample load-lock system allows fast transfer of samples and tips between the preparation chamber, high pressure reactor, and ambient environment. This STM reactor can work as a batch or flowing reactor at a pressure range of 10-13 to several bars and a temperature range of 300-700 K. Experiments performed on two samples both in vacuum and in high pressure conditions demonstrate the capability of in situ investigations of heterogeneous catalysis and surface chemistry at atomic resolution at a wide pressure range from UHV to a pressure higher than 1 atm. (D) 2008 American Institute of Physics.
C1 [Tao, Feng; Tang, David; Salmeron, Miquel; Somorjai, Gabor A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   [Tao, Feng; Tang, David; Salmeron, Miquel; Somorjai, Gabor A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem, Berkeley, CA 94720 USA.
   [Tao, Feng; Tang, David; Salmeron, Miquel; Somorjai, Gabor A.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
RP Somorjai, GA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
EM somorjai@berkeley.edu
FU Office of Science; Office of Advanced Scientific Computing Research;
   Office of Basic Energy Sciences; Materials Sciences and Engineering
   Division; of the U.S. Department of Energy [DE-AC02-05CH11231]
FX This work was Supported by the Director, Office of Science, Office of
   Advanced Scientific Computing Research, Office of Basic Energy Sciences,
   Materials Sciences and Engineering Division, of the U.S. Department of
   Energy under Contract No. DE-AC02-05CH11231.
NR 12
TC 44
Z9 44
U1 5
U2 46
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 AUG
PY 2008
VL 79
IS 8
AR 084101
DI 10.1063/1.2960569
PG 6
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 350SX
UT WOS:000259374500033
PM 19044362
ER

PT J
AU Wang, J
   Toby, BH
   Lee, PL
   Ribaud, L
   Antao, SM
   Kurtz, C
   Ramanathan, M
   Von Dreele, RB
   Beno, MA
AF Wang, Jun
   Toby, Brian H.
   Lee, Peter L.
   Ribaud, Lynn
   Antao, Sytle M.
   Kurtz, Charles
   Ramanathan, Mohan
   Von Dreele, Robert B.
   Beno, Mark A.
TI A dedicated powder diffraction beamline at the Advanced Photon Source:
   Commissioning and early operational results
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID SYNCHROTRON-RADIATION
AB A new dedicated high-resolution high-throughput powder diffraction beamline has been built, fully commissioned, and opened to general users at the Advanced Photon Source. The optical design and commissioning results are presented. Beamline performance was examined using a mixture of the NIST Si and Al(2)O(3) standard reference materials, as well as the LaB6 line-shape standard. Instrumental resolution as high as 1.7 X 10(-4) (Delta Q/Q) was observed. (C) 2008 American Institute of Physics.
C1 [Wang, Jun; Toby, Brian H.; Lee, Peter L.; Ribaud, Lynn; Antao, Sytle M.; Kurtz, Charles; Ramanathan, Mohan; Von Dreele, Robert B.; Beno, Mark A.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Wang, J (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
EM junwang@bnl.gov
RI Kurtz, Chalres/G-1037-2011; Toby, Brian/F-3176-2013
OI Kurtz, Chalres/0000-0003-2606-0864; Toby, Brian/0000-0001-8793-8285
FU U.S. Department of Energy; Office of Science; Office of Basic Energy
   Sciences [DE-AC02-06CH11357]
FX The authors would like to acknowledge Dr. John F. Mitchell and the late
   Dr. James D. Jorgensen for cowriting the IIBM project proposal with
   several of us. The instrument construction project was supported by U.S.
   Department of Energy, Office of Science, Office of Basic Energy
   Sciences, as part of DOE-BES LAB-03 instrument construction program. Use
   of Advanced Photon Source is supported by the U.S. Department of Energy,
   Office of Science, Office of Basic Energy Sciences, under Contract No.
   DE-AC02-06CH11357. The authors would like to thank Dr. Harriet Kung and
   Dr. Helen Kerch for the motivation provided by their interest in this
   project.
NR 21
TC 152
Z9 152
U1 2
U2 31
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 AUG
PY 2008
VL 79
IS 8
AR 085105
DI 10.1063/1.2969260
PG 7
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 350SX
UT WOS:000259374500049
PM 19044378
ER

PT J
AU Zheng, F
   Rassat, SD
   Helderandt, DJ
   Caldwell, DD
   Aardahl, CL
   Autrey, T
   Linehan, JC
   Rappe, KG
AF Zheng, Feng
   Rassat, Scot D.
   Helderandt, David J.
   Caldwell, Dustin D.
   Aardahl, Christopher L.
   Autrey, Tom
   Linehan, John C.
   Rappe, Kenneth G.
TI Automated gas burette system for evolved hydrogen measurements
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID SODIUM-BOROHYDRIDE SOLUTION; AQUEOUS AMMONIA-BORANE; CONSTANT-PRESSURE;
   THERMAL-DECOMPOSITION; GENERATION SYSTEM; CHEMICAL HYDRIDE;
   ROOM-TEMPERATURE; CO-B; HYDROLYSIS; CATALYST
AB This paper reports a simple and efficient gas burette system that allows automated determination of evolved gas volume in real time using only temperature and pressure measurements. The system is reliable and has been used successfully to study the hydrogen release kinetics of ammonia borane thermolysis. The system is especially suitable for bench scale studies involving small batches and potentially rapid reaction kinetics. (C) 2008 American Institute of Physics.
C1 [Zheng, Feng; Rassat, Scot D.; Helderandt, David J.; Caldwell, Dustin D.; Aardahl, Christopher L.; Autrey, Tom; Linehan, John C.; Rappe, Kenneth G.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Zheng, F (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA.
EM feng.zheng@pnl.gov
RI Zheng, Feng/C-7678-2009
OI Zheng, Feng/0000-0002-5427-1303
FU the Office of Energy Efficiency and Renewable Energy; U.S. Department of
   Energy as part of the Chemical Hydrogen Storage Center; the Pacific
   Northwest National Laboratory
FX This work was funded by the Office of Energy Efficiency and Renewable
   Energy, U.S. Department of Energy as part of the Chemical Hydrogen
   Storage Center and carried out at the Pacific Northwest National
   Laboratory (operated by Battelle for the U.S. DOE).
NR 34
TC 18
Z9 18
U1 1
U2 15
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD AUG
PY 2008
VL 79
IS 8
AR 084103
DI 10.1063/1.2968715
PG 5
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 350SX
UT WOS:000259374500035
PM 19044364
ER

PT J
AU Sanquist, TF
   Mahy, H
   Morris, F
AF Sanquist, Thomas F.
   Mahy, Heidi
   Morris, Frederic
TI An exploratory risk perception study of attitudes toward homeland
   security systems
SO RISK ANALYSIS
LA English
DT Article
DE homeland security; risk perception; terrorism
ID PRIVACY
AB Understanding the issues surrounding public acceptance of homeland security systems is important for balancing security needs and potential civil liberties infringements. A psychometric survey was used in an exploratory study of attitudes regarding homeland security systems. Psychometric rating data were obtained from 182 respondents on psychological attributes associated with 12 distinct types of homeland security systems. An inverse relationship was observed for the overall rating attributes of acceptability and risk of civil liberties infringement. Principal components analysis (PCA) yielded a two-factor solution with the rating scale loading pattern suggesting factors of perceived effectiveness and perceived intrusiveness. These factors also showed an inverse relationship. The 12 different homeland security systems showed significantly different scores on the rating scales and PCA factors. Of the 12 systems studied, airport screening, canine detectors, and radiation monitoring at borders were found to be the most acceptable, while email monitoring, data mining, and global positioning satellite (GPS) tracking were found to be least acceptable. Students rated several systems as more effective than professionals, but the overall pattern of results for both types of subjects was similar. The data suggest that risk perception research and the psychometric paradigm are useful approaches for quantifying attitudes regarding homeland security systems and policies and can be used to anticipate potentially significant public acceptance issues.
C1 [Sanquist, Thomas F.; Mahy, Heidi; Morris, Frederic] Pacific NW Natl Lab, Seattle, WA 98109 USA.
RP Sanquist, TF (reprint author), Pacific NW Natl Lab, 1100 Dexter Ave N, Seattle, WA 98109 USA.
EM sanquist@pnl.gov
NR 19
TC 12
Z9 12
U1 3
U2 10
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0272-4332
J9 RISK ANAL
JI Risk Anal.
PD AUG
PY 2008
VL 28
IS 4
BP 1125
EP 1133
DI 10.1111/j.1539-6924.2008.01069.x
PG 9
WC Public, Environmental & Occupational Health; Mathematics,
   Interdisciplinary Applications; Social Sciences, Mathematical Methods
SC Public, Environmental & Occupational Health; Mathematics; Mathematical
   Methods In Social Sciences
GA 332JB
UT WOS:000258078200024
PM 18627541
ER

PT J
AU Borovinskaya, MA
   Shoji, S
   Fredrick, K
   Cate, JHD
AF Borovinskaya, Maria A.
   Shoji, Shinichiro
   Fredrick, Kurt
   Cate, Jamie H. D.
TI Structural basis for hygromycin B inhibition of protein biosynthesis
SO RNA-A PUBLICATION OF THE RNA SOCIETY
LA English
DT Article
DE hygromycin B; aminoglycoside; ribosome; inhibition; translation;
   structure
ID TRANSFER-RNA BINDING; 30S RIBOSOMAL-SUBUNIT; ESCHERICHIA-COLI RIBOSOMES;
   TRANSFER RIBONUCLEIC ACID; AMINOGLYCOSIDE ANTIBIOTICS; MESSENGER-RNA;
   ELONGATION-FACTOR; BACTERIAL RIBOSOME; CONFORMATIONAL-CHANGES; ANGSTROM
   RESOLUTION
AB Aminoglycosides are one of the most widely used and clinically important classes of antibiotics that target the ribosome. Hygromycin B is an atypical aminoglycoside antibiotic with unique structural and functional properties. Here we describe the structure of the intact Escherichia coli 70S ribosome in complex with hygromycin B. The antibiotic binds to the mRNA decoding center in the small (30S) ribosomal subunit of the 70S ribosome and induces a localized conformational change, in contrast to its effects observed in the structure of the isolated 30S ribosomal subunit in complex with the drug. The conformational change in the ribosome caused by hygromycin B binding differs from that induced by other aminoglycosides. Also, in contrast to other aminoglycosides, hygromycin B potently inhibits spontaneous reverse translocation of tRNAs and mRNA on the ribosome in vitro. These structural and biochemical results help to explain the unique mode of translation inhibition by hygromycin B.
C1 [Borovinskaya, Maria A.; Cate, Jamie H. D.] Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
   [Shoji, Shinichiro; Fredrick, Kurt] Ohio State Univ, Dept Microbiol, Columbus, OH 43210 USA.
   [Fredrick, Kurt] Ohio State Univ, Ohio State Biochem Program, Columbus, OH 43210 USA.
   [Cate, Jamie H. D.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Cate, Jamie H. D.] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
RP Cate, JHD (reprint author), Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
EM jcate@lbl.gov
FU NCI NIH HHS [CA92584, P01 CA092584]; NIGMS NIH HHS [GM072528, GM65050,
   R01 GM065050, R01 GM072528]
NR 72
TC 49
Z9 50
U1 1
U2 7
PU COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
PI COLD SPRING HARBOR
PA 1 BUNGTOWN RD, COLD SPRING HARBOR, NY 11724 USA
SN 1355-8382
J9 RNA
JI RNA-Publ. RNA Soc.
PD AUG
PY 2008
VL 14
IS 8
BP 1590
EP 1599
DI 10.1261/rna.1076908
PG 10
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 328LU
UT WOS:000257800700016
PM 18567815
ER

PT J
AU Garcia-Barriocanal, J
   Rivera-Calzada, A
   Varela, M
   Sefrioui, Z
   Iborra, E
   Leon, C
   Pennycook, SJ
   Santamaria, J
AF Garcia-Barriocanal, J.
   Rivera-Calzada, A.
   Varela, M.
   Sefrioui, Z.
   Iborra, E.
   Leon, C.
   Pennycook, S. J.
   Santamaria, J.
TI Colossal ionic conductivity at interfaces of epitaxial ZrO2 :
   Y2O3/SrTiO3 heterostructures
SO SCIENCE
LA English
DT Article
ID OXIDE FUEL-CELLS; ELECTRICAL-CONDUCTIVITY; THIN-FILMS; ELECTROLYTES;
   TEMPERATURE; GLASSES; CONDUCTORS; CRYSTALS; ZIRCONIA; ENERGY
C1 [Garcia-Barriocanal, J.; Rivera-Calzada, A.; Sefrioui, Z.; Leon, C.; Santamaria, J.] Univ Complutense Madrid, Grp Fis Mat Complejos, E-28040 Madrid, Spain.
   [Varela, M.; Pennycook, S. J.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
   [Iborra, E.] Univ Politecn Madrid, Escuela Tecn Super Ingn Telecommun, E-28040 Madrid, Spain.
RP Santamaria, J (reprint author), Univ Complutense Madrid, Grp Fis Mat Complejos, E-28040 Madrid, Spain.
EM jacsan@fis.ucm.es
RI Leon, Carlos/A-5587-2008; Varela, Maria/H-2648-2012; Varela,
   Maria/E-2472-2014; Albe, Karsten/F-1139-2011; Iborra,
   Enrique/A-4148-2016; Santamaria, Jacobo/N-8783-2016; Sefrioui,
   Zouhair/C-2728-2017
OI Leon, Carlos/0000-0002-3262-1843; Varela, Maria/0000-0002-6582-7004;
   Iborra, Enrique/0000-0002-1385-1379; Santamaria,
   Jacobo/0000-0003-4594-2686; Sefrioui, Zouhair/0000-0002-6703-3339
NR 34
TC 328
Z9 335
U1 18
U2 220
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
J9 SCIENCE
JI Science
PD AUG 1
PY 2008
VL 321
IS 5889
BP 676
EP 680
DI 10.1126/science.1156393
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 332IW
UT WOS:000258077700040
PM 18669859
ER

PT J
AU Djuric, PM
   Benveniste, H
   Wagshul, ME
   Henn, F
   Enikolopov, G
   Maletic-Savatic, M
AF Djuric, Petar M.
   Benveniste, Helene
   Wagshul, Mark E.
   Henn, Fritz
   Enikolopov, Grigori
   Maletic-Savatic, Mirjana
TI Response to comments on "magnetic resonance spectroscopy identifies
   neural progenitor cells in the live human brain"
SO SCIENCE
LA English
DT Editorial Material
ID H-1-NMR SPECTROSCOPY; NMR-SPECTROSCOPY; HRMAS H-1-NMR; METABOLITES;
   EXTRACTION; TISSUE; PROFILES
C1 [Djuric, Petar M.; Benveniste, Helene; Wagshul, Mark E.; Maletic-Savatic, Mirjana] SUNY Stony Brook, Stony Brook, NY 11794 USA.
   [Benveniste, Helene; Henn, Fritz] Brookhaven Natl Lab, Brookhaven, NY 11719 USA.
   [Enikolopov, Grigori; Maletic-Savatic, Mirjana] Cold Spring Harbor Lab, Cold Spring Harbor, NY 11724 USA.
RP Djuric, PM (reprint author), SUNY Stony Brook, Stony Brook, NY 11794 USA.
EM djuric@ece.sunysb.edu; Mirjana.Maletic-Savatic@stonybrook.edu
RI Enikolopov, Grigori/B-7771-2009
OI Enikolopov, Grigori/0000-0001-8178-8917
NR 24
TC 1
Z9 1
U1 0
U2 5
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
EI 1095-9203
J9 SCIENCE
JI Science
PD AUG 1
PY 2008
VL 321
IS 5889
DI 10.1126/science.1156889
PG 3
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 332IW
UT WOS:000258077700024
ER

PT J
AU Mazumder, SK
   Pradhan, SK
   Hartvigsen, J
   Rancruel, D
   von Spakovsky, MR
   Khaleel, M
AF Mazumder, Sudip K.
   Pradhan, Sanjaya K.
   Hartvigsen, Joseph
   Rancruel, Diego
   von Spakovsky, Michael R.
   Khaleel, Moe
TI A Multidiscipline and Multi-rate Modeling Framework for Planar
   Solid-oxide-fuel-cell based Power-Conditioning System for Vehicular APU
SO SIMULATION-TRANSACTIONS OF THE SOCIETY FOR MODELING AND SIMULATION
   INTERNATIONAL
LA English
DT Article
DE Modeling; planar solid-oxide fuel cell (SOFC); auxiliary power unit
   (APU); power electronics; power conditioning; balance of plant (BOP)
AB A numerical modeling framework for planar solid-oxide fuel cell (PSOFC) based vehicular auxiliary power unit (APU) is developed. The power-conditioning system (PCS) model comprises the comprehensive transient models of PSOFC, balance-of-plant and power-electronics subsystems (BOPS and PES, respectively) and application load (AL). It can be used for resolving the interactions among PSOFC, BOPS, PES and AL, control design and system optimization and studying fuel-cell durability. The PCS model has several key properties including: (i) it can simultaneously predict spatial as well as temporal dynamics; (ii) it has two levels of abstraction: comprehensive (for detailed dynamics) and reduced-order (for fast simulation); and (iii) the fast-simulation model can be implemented completely in Simulink/Matlab environment, thereby significantly reducing the cost as well as time and provides the avenue for real-time simulation and integration with vehicular power-train models employing the widely used ADVISOR. The computational overhead and accuracy of the fast-simulation and comprehensive models are compared. Significant savings in time compared to using the former were obtained, without compromising accuracy.
C1 [Mazumder, Sudip K.] Univ Illinois, Dept Elect & Comp Engn, Lab Energy & Switching Elect Syst, Chicago, IL 60680 USA.
   [von Spakovsky, Michael R.] Virginia Polytech Inst & State Univ, Dept Mech Engn, Energy Syst Res Ctr, Blacksburg, VA 24061 USA.
   [Khaleel, Moe] Pacific NW Natl Lab, Computat Sci & Math Div, Richland, WA 99352 USA.
RP Mazumder, SK (reprint author), Univ Illinois, Dept Elect & Comp Engn, Lab Energy & Switching Elect Syst, Chicago, IL 60680 USA.
EM mazumder@ece.uic.edu; Sanjaya.K.pradhan@Philips.com; joe@h-hydro.com;
   rancruel@hotmail.com; vonspako@vt.edu; moe.Khaleel@pnl.gov
RI von Spakovsky, Michael/F-2465-2014; 
OI von Spakovsky, Michael/0000-0002-3884-6904; khaleel,
   mohammad/0000-0001-7048-0749
FU US Environmental Protection Agency [RD-83158101-0]; Pacific Northwest
   National Laboratory [494828]; Department of Energy [DE-FC2602NT41574];
   National Science Foundation [0239131]; Office of Naval Research Young
   Investigator [N000140510594]
FX This paper is prepared with the support of the US Environmental
   Protection Agency (Award No. RD-83158101-0), Pacific Northwest National
   Laboratory (Award No. 494828), Department of Energy (Award No.
   DE-FC2602NT41574), National Science Foundation CAREER (Award No.
   0239131) and Office of Naval Research Young Investigator (Award No.
   N000140510594) received by Prof. Mazumder. However, any opinions,
   findings, conclusions or recommendations expressed herein are those of
   the authors and do not necessarily reflect the views of these supporting
   organizations.
NR 23
TC 1
Z9 1
U1 0
U2 3
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 0037-5497
J9 SIMUL-T SOC MOD SIM
JI Simul.-Trans. Soc. Model. Simul. Int.
PD AUG
PY 2008
VL 84
IS 8-9
BP 413
EP 426
DI 10.1177/0037549708097713
PG 14
WC Computer Science, Interdisciplinary Applications; Computer Science,
   Software Engineering
SC Computer Science
GA 370CH
UT WOS:000260739800003
ER

PT J
AU Perez-Bergquist, A
   Zhu, S
   Sun, K
   Xiang, X
   Zhang, Y
   Wang, LM
AF Perez-Bergquist, Aleiandro
   Zhu, Sha
   Sun, Kai
   Xiang, Xia
   Zhang, Yanwen
   Wang, Lumin
TI Embedded nanofibers induced by high-energy ion irradiation of bulk GaSb
SO SMALL
LA English
DT Article
DE embedded nanofibers; ion beams; nanoporous materials; semiconductors
ID GALLIUM ANTIMONIDE; DAMAGE; BEAM; GERMANIUM; DEFECT; GE
C1 [Perez-Bergquist, Aleiandro; Zhu, Sha; Sun, Kai; Xiang, Xia; Wang, Lumin] Univ Michigan, Dept Mat Sci & Engn, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA.
   [Zhang, Yanwen] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Wang, LM (reprint author), Univ Michigan, Dept Mat Sci & Engn, Dept Nucl Engn & Radiol Sci, 2355 Bonisteel Blvd, Ann Arbor, MI 48109 USA.
EM lmwang@umich.edu
FU U.S. DOE [DE-FG02-02ER46005, DE-AC05-76RL01830]; NSF [DMR-0320740,
   DMR-9871177]
FX This study was supported by the U.S. DOE (DE-FG02-02ER46005 and
   DE-AC05-76RL01830). Ion implantations were conducted in the
   Environmental Molecular Sciences Laboratory at PNNL and analyses were
   completed at the University of Michigan's Electron Microbeam Analysis
   Laboratory using equipment supported in part by the NSF (DMR-0320740 and
   DMR-9871177).
NR 21
TC 21
Z9 21
U1 3
U2 21
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1613-6810
J9 SMALL
JI Small
PD AUG
PY 2008
VL 4
IS 8
BP 1119
EP 1124
DI 10.1002/smll.200701236
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 339GP
UT WOS:000258566400017
PM 18651713
ER

PT J
AU Karakoti, AS
   Kuchibhatla, SVNT
   Baer, DR
   Thevuthasan, S
   Sayle, DC
   Seal, S
AF Karakoti, Ajay S.
   Kuchibhatla, Satyanarayana V. N. T.
   Baer, Donald R.
   Thevuthasan, Suntharampillai
   Sayle, Dean C.
   Seal, Sudipta
TI Self-assembly of cerium oxide nanostructures in ice molds
SO SMALL
LA English
DT Article
DE cerium oxide; ice; nanorods; self-assembly; templates
ID NANOPARTICLES; SHAPE; SOLIDIFICATION; NANOCRYSTALS; ORIENTATION;
   ATTACHMENT; NANOWIRES; NANORODS; WATER
AB The formation of nanorods driven by the physicochemical phenomena, during the freezing and after the aging of frozen ceria nanoparticle suspensions, is reported. During freezing of a dilute aqueous solution of CeO2 nanocrystals, some nuclei remain in solution while others are trapped inside micro- and nanometer voids formed within the growing ice front. Over time (2-3 weeks) the particles trapped within the nanometer-wide voids in the ice combine by an oriented attachment process to form ceria nanorods. The experimental observations are consistent with molecular dynamics simulations of particle aggregation in constrained environments. These observations suggest a possible strategy for the templated formation of nanostructures through self-assembly by exploiting natural phenomena, such as voids formed during freezing of water. This research suggests a very simple,, green chemical route to guide the formation of one- and three-dimensional self-assembled nanostructures.
C1 [Karakoti, Ajay S.; Kuchibhatla, Satyanarayana V. N. T.; Seal, Sudipta] Univ Cent Florida, Dept Mech Mat & Aerosp Engn, Surface Engn & Nanotechnol Facil, Adv Mat Proc & Anal Ctr, Orlando, FL 32816 USA.
   [Seal, Sudipta] Univ Cent Florida, Nanosci & Technol Ctr, Orlando, FL 32816 USA.
   [Kuchibhatla, Satyanarayana V. N. T.; Baer, Donald R.; Thevuthasan, Suntharampillai] Pacific NW Natl Lab, Environm & Mol Sci Lab, Richland, WA 99354 USA.
   [Sayle, Dean C.] Def Acad United Kingdom, Def Coll Management & Technol, Dept Appl Sci Secur & Resilience, Swindon SN6 8LA, Wilts, England.
RP Seal, S (reprint author), Univ Cent Florida, Dept Mech Mat & Aerosp Engn, Surface Engn & Nanotechnol Facil, Adv Mat Proc & Anal Ctr, Orlando, FL 32816 USA.
EM sseal@mail.ucf.edu
RI Sayle, Dean/D-8555-2013; Baer, Donald/J-6191-2013
OI Sayle, Dean/0000-0001-7227-9010; Baer, Donald/0000-0003-0875-5961
FU NSF NIRT [CBET-0708172]; NSF CMMI [0629080]; Environmental and Molecular
   Sciences Laboratory; US Department of Energy (DOE); Cambridge-Cranfield
   HPC facility; MOTT2 [GR/S84415/01]
FX The authors would like to acknowledge the partial funding support from
   the NSF under grants NSF NIRT CBET-0708172 and NSF CMMI 0629080.
   Portions of this work were conducted in the Environmental and Molecular
   Sciences Laboratory, a US Department of Energy (DOE) user facility
   operated by Pacific Northwest National Laboratory for the Office of
   Biological and Environmental Research of the DOE. We also thank J.
   Churchill for computational support. Computer resources were provided by
   the Cambridge-Cranfield HPC facility and MOTT2 (EPSRC Grant
   GR/S84415/01) run by the CCLRC e-Science Centre.
NR 34
TC 26
Z9 26
U1 4
U2 39
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 AUG
PY 2008
VL 4
IS 8
BP 1210
EP 1216
DI 10.1002/smll.200800219
PG 7
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
   Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
   Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
   Physics
GA 339GP
UT WOS:000258566400031
PM 18654994
ER

PT J
AU Ahrenkiel, RK
   Johnston, SW
AF Ahrenkiel, R. K.
   Johnston, S. W.
TI Lifetime analysis of silicon solar cells by microwave reflection
SO SOLAR ENERGY MATERIALS AND SOLAR CELLS
LA English
DT Article
DE silicon; recombination; microwaves; photoelectron lifetime
ID CHARGE-CARRIER KINETICS; CONDUCTIVITY MEASUREMENTS; SEMICONDUCTORS
AB Microwave photoconductive decay (pPCD) has become a standard technique for measuring the carrier lifetime of silicon used in solar cells. Here, we have used pPCD to examine the carrier lifetimes at common doping levels used in the base region of silicon photovoltaic devices. For the conductivity range used in the p-type base of n(+)-p structures, the microwave penetration depth is less than the wafer thickness. In this case, the reflectance-conductivity relationship is very nonlinear. We will show that quasi-steady-state photoconductivity (QSSPC) and resonance-coupled photoconductive decay (RCPCD) lifetime measurements track over a wide range of injection level, and generally agree at higher injection levels. Our mu PCD data will be compared with the transient RCPCD data over the same range. The data from the latter agree at low-injection levels, but show serious disagreement at higher injection levels. The conclusion is that pPCD must be limited to low-injection levels in the doping range used for solar cells. Published by Elsevier B.V.
C1 [Ahrenkiel, R. K.] Colorado Sch Mines, Dept Met & Mat Engn, Golden, CO 80401 USA.
   [Ahrenkiel, R. K.; Johnston, S. W.] Natl Renewable Energy Lab, Golden, CO USA.
RP Ahrenkiel, RK (reprint author), Colorado Sch Mines, Dept Met & Mat Engn, 1500 Illinois St,Hill Hall, Golden, CO 80401 USA.
EM richard_ahrenkiel@nrel.gov
NR 12
TC 10
Z9 10
U1 0
U2 15
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0927-0248
J9 SOL ENERG MAT SOL C
JI Sol. Energy Mater. Sol. Cells
PD AUG
PY 2008
VL 92
IS 8
BP 830
EP 835
DI 10.1016/j.solmat.2008.01.022
PG 6
WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied
SC Energy & Fuels; Materials Science; Physics
GA 322DZ
UT WOS:000257356700002
ER

PT J
AU Jian, LK
   Russell, CT
   Luhmann, JG
   Skoug, RM
   Steinberg, JT
AF Jian, L. K.
   Russell, C. T.
   Luhmann, J. G.
   Skoug, R. M.
   Steinberg, J. T.
TI Stream interactions and interplanetary coronal mass ejections at 5.3 AU
   near the solar ecliptic plane
SO SOLAR PHYSICS
LA English
DT Article
ID COROTATING INTERACTION REGIONS; MAGNETIC CLOUDS; SHOCK-WAVES; JUPITERS
   MAGNETOSPHERE; ULYSSES OBSERVATIONS; IMP-8 OBSERVATIONS; WIND; VOYAGER;
   DISTURBANCES; EVOLUTION
AB We have performed a survey of the characteristics of two types of large spatial-scale solar-wind structures, stream interaction regions (SIRs),and interplanetary coronal mass ejections (ICMEs), near 5.3 AU, using solar-wind observations from Ulysses. Our study is confined to the three aphelion passes of Ulysses, and also within +/- 10 degrees of the solar ecliptic plane, covering a part of 1992, 1997-1998, and 2003-2005, representing three slices of different phases of the solar activity cycle. Overall, there are 54 SIRs and 60 ICMEs in the survey. Many are merged in hybrid events, suggesting that they have undergone multiple interactions prior to reaching Jovian orbit. About 91% of SIRs occur with shocks, with 47% of such shocks being forward-reverse shock pairs. The solar-wind velocity sometimes stays constant or even decreases within the interaction region near 5.3 AU, in contrast with the gradual velocity increase during SIRs at 1 AU. Shocks are driven by 58% of ICMEs, with 94% of them being forward shocks. Some ICMEs seem to have multiple small flux ropes with different scales and properties. We quantitatively compare various properties of SIRs and ICMEs at 5.3 AU, and study their statistical distributions and variations with solar activity. The width, maximum dynamic pressure, and peak perpendicular pressure of SIRs all become larger than ICMEs. Dynamic pressure (P-dyn) is expected to be important for Jovian magnetospheric activity. We have examined the distributions of P-dyn of SIRs, ICMEs, and general solar wind, but these cannot explain the observed bimodal distribution of the location of the Jovian magnetopause. By comparing the properties of SIRs and ICMEs at 0.72, 1, and 5.3 AU, we find that the ICME expansion slows down significantly between 1 and 5.3 AU. Some transient and small streams in the inner heliosphere have merged into a single interaction region.
C1 [Jian, L. K.; Russell, C. T.] Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095 USA.
   [Luhmann, J. G.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
   [Skoug, R. M.; Steinberg, J. T.] Los Alamos Natl Lab, Space Sci & Applicat, Los Alamos, NM 87545 USA.
RP Jian, LK (reprint author), Univ Calif Los Angeles, Inst Geophys & Planetary Phys, 595 Charles E Young Dr E,6862 Slichter, Los Angeles, CA 90095 USA.
EM jlan@igpp.ucla.edu; ctrussel@igpp.ucla.edu; jgluhman@ssl.berkeley.edu;
   rskoug@lanl.gov; jsteinberg@lanl.gov
RI Jian, Lan/B-4053-2010
OI Jian, Lan/0000-0002-6849-5527
NR 81
TC 10
Z9 10
U1 0
U2 0
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0038-0938
EI 1573-093X
J9 SOL PHYS
JI Sol. Phys.
PD AUG
PY 2008
VL 250
IS 2
BP 375
EP 402
DI 10.1007/s11207-008-9204-x
PG 28
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 332OV
UT WOS:000258093200010
ER

PT J
AU Prozorov, R
AF Prozorov, Ruslan
TI Superfluid density in a superconductor with an extended d-wave gap
SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY
LA English
DT Article
ID PENETRATION DEPTH
AB The superconducting gap and the superfluid density are calculated for the extended d-wave gap suggested by angle-resolved photoemission spectroscopy (ARPES) measurements in electron-doped superconductors as well as underdoped Bi(2)Sr(2)CaCu(2)O(8+x) (BSCCO2212). It is shown that experimental superfluid density may agree with such a gap, but full-temperature range analysis is required. With additional information on the Delta (0)/T(c) ratio, this opens up the possibility of deciding whether a non-monotonic or higher harmonic spectral gap, as seen by ARPES, is a superposition of a regular d-wave gap and an unrelated pseudogap that does not contribute to superconductivity or that the extended gap is a real superconducting gap. This paper is also an erratum to earlier calculations published in Prozorov and Giannetta (2006 Supercond. Sci. Technol. 19 R41-67) where the wrong sign was used for the non-monotonic gap, altering the conclusions rather drastically.
C1 [Prozorov, Ruslan] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
   [Prozorov, Ruslan] 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
OI Prozorov, Ruslan/0000-0002-8088-6096
NR 9
TC 7
Z9 7
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-2048
J9 SUPERCOND SCI TECH
JI Supercond. Sci. Technol.
PD AUG
PY 2008
VL 21
IS 8
AR 082003
DI 10.1088/0953-2048/21/8/082003
PG 3
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 314XC
UT WOS:000256841500003
ER

PT J
AU Smentkowski, VS
   Ostrowski, SG
   Kollmer, F
   Schnieders, A
   Keenan, MR
   Ohlhausen, JA
   Kotula, PG
AF Smentkowski, V. S.
   Ostrowski, S. G.
   Kollmer, F.
   Schnieders, A.
   Keenan, M. R.
   Ohlhausen, J. A.
   Kotula, P. G.
TI Multivariate statistical analysis of non-mass-selected ToF-SIMS data
SO SURFACE AND INTERFACE ANALYSIS
LA English
DT Article
DE ToF-SIMS; multivariate statistical analysis; chemometrics; LMIG; cluster
ID PRIMARY ION-BOMBARDMENT; ORGANIC MATERIALS; SPECTRAL IMAGES
AB Cluster LMIGs are now regarded as the standard primary ion guns on time-of-flight secondary ion mass spectrometers (ToF-SIMS). The ToF-SIMS analyst typically selects a bombarding species (cluster size and charge) to be used for material analysis. Using standard data collection protocols where the analyst uses only a single primary bombarding species, only a fraction of the ion-beam current generated by the LMIG is used. In this work, we demonstrate for the first time that it is possible to perform ToF-SIMS analysis when all of the primary ion intensity (clusters) are used; we refer to this new data analysis mode as non-mass-selected (NMS) analysis. Since each of the bombarding species has a different mass-to-charge ratio, they strike the sample at different times, and as a result, each of the bombarding species generates a spectrum. The resulting NMS ToF-SIMS spectrum contains contributions from each of the bombarding species that are shifted in time. NMS spectra are incredibly complicated and would be difficult, if not impossible, to analyze using univariate methodology. We will demonstrate that automated multivariate statistical analysis (MVSA) tools are capable of rapidly converting the complicated NMS data sets into a handful of chemical components (represented by both spectra and images) that are easier to interpret since each component spectrum represents a unique and simpler chemistry. Copyright (C) 2008 John Wiley & Sons, Ltd.
C1 [Smentkowski, V. S.; Ostrowski, S. G.] Global Res, Gen Elect, Niskayuna, NY 12309 USA.
   [Kollmer, F.] ION TOF GmbH, Munster, Germany.
   [Schnieders, A.] TASCON USA Inc, Chestnut Ridge, NY 10977 USA.
   [Keenan, M. R.; Ohlhausen, J. A.; Kotula, P. G.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Smentkowski, VS (reprint author), Global Res, Gen Elect, Niskayuna, NY 12309 USA.
EM smentkow@research.ge.com
RI Kotula, Paul/A-7657-2011
OI Kotula, Paul/0000-0002-7521-2759
FU CRADA [SC00/01609]
FX The MVSA work was funded in part under CRADA agreement SC00/01609 PTS
   1609.02. V.S.S. and S.G.O. would also like to thank E.L. Hall and T.K.
   Leib at General Electric Global Research for providing the CRADA
   funding. Sandia is a multiprogram laboratory operated by Sandia
   Corporation, a Lockheed Martin Company, for the United States Department
   of Energy's National NuclearSecurity Administration under contract
   DE-AC04-94AL85000.
NR 18
TC 10
Z9 10
U1 0
U2 8
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0142-2421
J9 SURF INTERFACE ANAL
JI Surf. Interface Anal.
PD AUG
PY 2008
VL 40
IS 8
BP 1176
EP 1182
DI 10.1002/sia.2862
PG 7
WC Chemistry, Physical
SC Chemistry
GA 342FW
UT WOS:000258771000007
ER

PT J
AU Vinod, KY
   Yalamanchili, R
   Thanos, PK
   Vadasz, C
   Cooper, TB
   Volkow, ND
   Hungund, BL
AF Vinod, K. Yaragudri
   Yalamanchili, Ratnakumar
   Thanos, Panayotis K.
   Vadasz, Csaba
   Cooper, Thomas B.
   Volkow, Nora D.
   Hungund, Basalingappa L.
TI Genetic and pharmacological manipulations of the CB(1) receptor alter
   ethanol preference and dependence in ethanol preferring and
   nonpreferring mice
SO SYNAPSE
LA English
DT Article
DE alcohol; striatum; CB(1) receptor; G-protein; endocannabinoid;
   anandamide
ID ACID AMIDE HYDROLASE; NUCLEUS-ACCUMBENS; KNOCKOUT MICE; ALCOHOL
   DEPENDENCE; DOPAMINE RELEASE; ANTAGONIST SR141716A; DBA/2 MICE; SP RATS;
   BRAIN; WITHDRAWAL
AB Recent studies have indicated a role for the endocannabinoid system in ethanol-related behaviors. This study examined the effect of pharmacological activation, blockade, and genetic deletion of the CB, receptors on ethanol-drinking behavior in ethanol preferring C57BL/6J (136) and ethanol nonpreferring DBA/2J (D2) mice. The deletion of CB, receptor significantly reduced the ethanol preference. Although the stimulation of the CB(1) receptor by CP-55,940 markedly increased the ethanol preference, this effect was found to be greater in 136 than in D2 mice. The antagonism of CB(1) receptor function by SR141716A led to a significant reduction in voluntary ethanol preference in 136 than D2 mice. A significant lower hypothermic and greater sedative response to acute ethanol administration was observed in both the strains of CB(1) -/- mice than wild-type mice. Interestingly, genetic deletion and pharmacological blockade of the CB(1) receptor produced a marked reduction in severity of handling-induced convulsion in both the strains. The radioligand binding studies revealed significantly higher levels of CB(1) receptor-stimulated G-protein activation in the striatum of 136 compared to D2 mice. Innate differences in the CB(1) receptor function might be one of the contributing factors for higher ethanol drinking behavior. The antagonists of the CB(1) receptor may have therapeutic potential in the treatment of ethanol dependence.
C1 [Vinod, K. Yaragudri; Yalamanchili, Ratnakumar; Cooper, Thomas B.; Hungund, Basalingappa L.] Nathan S Kline Inst Psychiat Res, Div Analyt Psychopharmacol, Orangeburg, NY 10962 USA.
   [Vinod, K. Yaragudri; Cooper, Thomas B.; Hungund, Basalingappa L.] New York State Psychiat Inst & Hosp, Div Analyt Psychopharmacol, New York, NY 10032 USA.
   [Vinod, K. Yaragudri] NYU, Sch Med, Dept Child & Adolescent Psychiat, New York, NY USA.
   [Thanos, Panayotis K.] Brookhaven Natl Lab, Dept Med, Behav Pharmacol & Neuroimaging Lab, Upton, NY 11973 USA.
   [Thanos, Panayotis K.; Volkow, Nora D.] NIAAA, Lab Neuroimaging, NIH, Bethesda, MD USA.
   [Vadasz, Csaba] Nathan S Kline Inst Psychiat Res, Lab Neurobehav Genet, Orangeburg, NY 10962 USA.
   [Vadasz, Csaba; Cooper, Thomas B.] NYU, Sch Med, Dept Psychiat, New York, NY USA.
   [Cooper, Thomas B.; Hungund, Basalingappa L.] Columbia Univ, Dept Psychiat, Coll Phys & Surg, New York, NY USA.
RP Hungund, BL (reprint author), Nathan S Kline Inst Psychiat Res, Div Analyt Psychopharmacol, 140 Old Orangeburg Rd, Orangeburg, NY 10962 USA.
EM hungund@nki.rfmh.org
FU Intramural NIH HHS [Z01 AA000551-04]; NIAAA NIH HHS [AA13003,
   N01AA22008, R01 AA013003]
NR 51
TC 35
Z9 35
U1 0
U2 0
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0887-4476
J9 SYNAPSE
JI Synapse
PD AUG
PY 2008
VL 62
IS 8
BP 574
EP 581
DI 10.1002/syn.20533
PG 8
WC Neurosciences
SC Neurosciences & Neurology
GA 323VT
UT WOS:000257477200003
PM 18509854
ER

PT J
AU Somorjai, GA
   Park, JY
AF Somorjai, Gabor A.
   Park, Jeong Y.
TI Colloid Science of Metal Nanoparticle Catalysts in 2D and 3D Structures.
   Challenges of Nucleation, Growth, Composition, Particle Shape, Size
   Control and Their Influence on Activity and Selectivity
SO TOPICS IN CATALYSIS
LA English
DT Article
DE Platinum; Rhodium; Nanoparticle; Reaction selectivity; Multi-path
   reactions; Nanoscience; Metal-oxide interface; Catalytic nanodiode;
   Bimetallic nanoparticles; Enzyme; Homogeneous; Heterogeneous catalysis
ID SCANNING-TUNNELING-MICROSCOPY; SUM-FREQUENCY GENERATION; BLODGETT
   MONOLAYER FORMATION; MESOPOROUS SBA-15 SILICA; SINGLE-CRYSTAL SURFACES;
   PLATINUM NANOPARTICLES; ELECTRON FLOW; GAS-PHASE; HETEROGENEOUS
   CATALYSIS; SUPPORT INTERACTIONS
AB Recent breakthroughs in the synthesis of nanosciences have achieved the control of size and shape of nanoparticles that are relevant for catalyst design. In this article, we review advances in the synthesis of nanoparticles, fabrication of two- and three-dimensional model catalyst systems, characterization, and studies of activity and selectivity. The ability to synthesize monodispersed platinum and rhodium nanoparticles 1-10 nm in size permitted us to study the influence of composition, structure, and dynamic properties of monodispersed metal nanoparticles on chemical reactivity and selectivity. We review the importance of the size and shape of nanoparticles to determine reaction selectivity in multi-path reactions. The influence of metal-support interaction has been studied by probing the hot electron flows through the metal-oxide interface in catalytic nanodiodes. Novel designs of nano-particle catalytic systems are also discussed.
C1 [Somorjai, Gabor A.; Park, Jeong Y.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Somorjai, Gabor A.; Park, Jeong Y.] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   [Somorjai, Gabor A.; Park, Jeong Y.] Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM somorjai@berkeley.edu
RI Park, Jeong Young/A-2999-2008
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, Division of Materials Sciences and Engineering of
   the U. S. Department of Energy under Contract No. DE-AC02-05CH11231.
NR 49
TC 172
Z9 173
U1 16
U2 160
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1022-5528
EI 1572-9028
J9 TOP CATAL
JI Top. Catal.
PD AUG
PY 2008
VL 49
IS 3-4
BP 126
EP 135
DI 10.1007/s11244-008-9077-0
PG 10
WC Chemistry, Applied; Chemistry, Physical
SC Chemistry
GA 386VE
UT WOS:000261909900002
ER

PT J
AU Jang, B
   Helleson, M
   Shi, C
   Rondinone, A
   Schwartz, V
   Liang, CD
   Overbury, S
AF Jang, Ben
   Helleson, Michael
   Shi, Chunkai
   Rondinone, Adam
   Schwartz, Viviane
   Liang, Chengdu
   Overbury, Steve
TI Characterization of Al2O3 Supported Nickel Catalysts Derived from RF
   Non-thermal Plasma Technology
SO TOPICS IN CATALYSIS
LA English
DT Article
DE Non-thermal plasma; Benzene hydrogenation; Metal-support interaction;
   Supported Ni catalysts
ID SELECTIVE HYDROGENATION; SMSI; CROTONALDEHYDE; ACETYLENE; PT/TIO2; AIR;
   PD
AB Catalysts derived from non-thermal plasma techniques have previously shown unusual and highly advantageous catalytic properties including room temperature reduction, unusual metal particle structure and metal-support interactions, and enhanced selectivity and stability. This study focuses on the characterization of Al2O3 supported Ni catalysts derived from the RF non-thermal plasma technique with in-situ XRD, TPR-MS and STEM and on relating the results to the enhanced activity and stability of benzene hydrogenation. The results suggest that catalysts with plasma treatments before impregnation are relatively easier to be reduced and result in better activities under mild reduction conditions. These plasma treatments stabilize the nickel particle sizes of air( B) and H-2(B) catalysts at 600 degrees C by slowing down the sintering process. Plasma treatments after the impregnation of precursors, on the other hand, tend to delay the growth of nickel particles below 600 degrees C, forming smaller Ni particles, but with a sudden increase in particle size near 600 degrees C. It suggests that the structure of Ni nitrate and the metal-support interaction have been altered by the plasma treatments. The reduction patterns of plasma treated catalysts are, therefore, changed. The catalyst with a combination plasma treatment demonstrates that the effect of a combination plasma treatment is larger than either the plasma treatment before or after the impregnation alone. Both plasma treatments before and after the impregnation of metal precursor play important roles in modifying supported metal catalysts.
C1 [Jang, Ben; Helleson, Michael; Shi, Chunkai] Texas A&M Univ, Dept Chem, Commerce, TX 75429 USA.
   [Rondinone, Adam; Schwartz, Viviane; Liang, Chengdu; Overbury, Steve] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Jang, B (reprint author), Texas A&M Univ, Dept Chem, Commerce, TX 75429 USA.
EM ben_jang@tamu-commerce.edu
RI Liang, Chengdu/G-5685-2013; Shi, Chunkai/C-2904-2014; Rondinone,
   Adam/F-6489-2013
OI Rondinone, Adam/0000-0003-0020-4612
FU ARP-THECB; Welch Foundation; Oak Ridge National Laboratory; U.S. DOE
FX The financial support of ARP-THECB and Welch Foundation is acknowledged.
   A portion of this research was conducted at the Center for Nanophase
   Materials Sciences, sponsored at Oak Ridge National Laboratory, by the
   Division of Scientific User Facilities, U.S. DOE.
NR 23
TC 7
Z9 8
U1 1
U2 20
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1022-5528
J9 TOP CATAL
JI Top. Catal.
PD AUG
PY 2008
VL 49
IS 3-4
BP 145
EP 152
DI 10.1007/s11244-008-9091-2
PG 8
WC Chemistry, Applied; Chemistry, Physical
SC Chemistry
GA 386VE
UT WOS:000261909900004
ER

PT J
AU Burton, PD
   Lavenson, D
   Johnson, M
   Gorm, D
   Karim, AM
   Conant, T
   Datye, AK
   Hernandez-Sanchez, BA
   Boyle, TJ
AF Burton, Patrick D.
   Lavenson, David
   Johnson, Michael
   Gorm, David
   Karim, Ayman M.
   Conant, Travis
   Datye, Abhaya K.
   Hernandez-Sanchez, Bernadette A.
   Boyle, Timothy J.
TI Synthesis and Activity of Heterogeneous Pd/Al(2)O(3) and Pd/ZnO
   Catalysts Prepared from Colloidal Palladium Nanoparticles
SO TOPICS IN CATALYSIS
LA English
DT Article
DE Palladium; Alumina; Zinc oxide; CO oxidation
ID PDZN ALLOY FORMATION; METHANOL; PD(111)
AB Heterogeneous catalysts composed of Pd nanoparticles on zinc oxide (ZnO) and aluminum oxide (Al(2)O(3), alumina) were synthesized and tested for catalytic activity. Palladium nanoparticles were synthesized via solution-precipitation methods and deposited on aluminum oxide and zinc oxide supports. The particles were synthesized by decomposing a palladium precursor (Pd(Mes)(2)) in a solution of trioctylphosphine [TOP route] or palladium acetate (Pd(OAc)(2)) in a solution of octylamine [amine route] at 300 degrees C. The particles were washed and suspended in hexane, whereupon they were deposited on an oxide powder. Supported nanoparticle powders were subjected to CO oxidation tests to determine catalytic activity. Particle sizes ranged from 2.4 +/- 0.4 nm average diameter when prepared using trioctylphosphine to 4 +/- 1 nm using the amine route. No significant size change was observed after removal of the surfactant and catalytic testing by CO oxidation. The highest conversion of CO to CO(2) occurred with a calcined sample, indicating that the removal of surfactant increases activity.
C1 [Burton, Patrick D.; Lavenson, David; Johnson, Michael; Gorm, David; Karim, Ayman M.; Conant, Travis; Datye, Abhaya K.] Univ New Mexico, Ctr Microengineered Mat, Albuquerque, NM 87131 USA.
   [Hernandez-Sanchez, Bernadette A.; Boyle, Timothy J.] Adv Mat Lab, Sandia Natl Labs, Albuquerque, NM 87106 USA.
RP Datye, AK (reprint author), Univ New Mexico, Ctr Microengineered Mat, MSC01 1120, Albuquerque, NM 87131 USA.
EM datye@unm.edu
RI Karim, Ayman/G-6176-2012; 
OI Karim, Ayman/0000-0001-7449-542X; Datye, Abhaya/0000-0002-7126-8659
FU United States Department of Energy, Office of Basic Energy Sciences
   [DE-FG02-05ER15712, DE-AC04-94AL85000]
FX This work has been supported by the United States Department of Energy,
   Office of Basic Energy Sciences under contract number DE-FG02-05ER15712
   through the University of New Mexico. 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 10
TC 18
Z9 18
U1 4
U2 26
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1022-5528
J9 TOP CATAL
JI Top. Catal.
PD AUG
PY 2008
VL 49
IS 3-4
BP 227
EP 232
DI 10.1007/s11244-008-9092-1
PG 6
WC Chemistry, Applied; Chemistry, Physical
SC Chemistry
GA 386VE
UT WOS:000261909900014
ER

PT J
AU Herrera, JE
   Kwak, JH
   Hu, JZ
   Wang, Y
   Peden, CHF
AF Herrera, Jose E.
   Kwak, Ja Hun
   Hu, Jian Zhi
   Wang, Yong
   Peden, Charles H. F.
TI Effects of Novel Supports on the Physical and Catalytic Properties of
   Tungstophosphoric Acid for Alcohol Dehydration Reactions
SO TOPICS IN CATALYSIS
LA English
DT Article
DE Tungstophosphoric acid; Mesoporous silica; MCM-41; SBA-15
ID COMPRISING HETEROPOLY ACID; TUNGSTEN-OXIDE CATALYSTS; MESOPOROUS SILICA;
   12-TUNGSTOPHOSPHORIC ACID; ISOBUTANE DEHYDROGENATION; MOLECULAR-SIEVE;
   MAS NMR; ALUMINA; MCM-41; IMMOBILIZATION
AB The catalytic behavior of tungstophosphoric acid supported on modified mesoporous silica materials for the dehydration of 2-butanol and methanol was studied. Specifically, the supports evaluated here consisted of unmodified MCM-41 and SBA-15 mesoporous silicas, and these materials coated with sub-monolayer quantities of alumina, titania, and zirconia. UV-Vis DRS and (31)P-NMR spectroscopy showed that the tungstophosphoric acid species retained their chemical identity in the synthesized supported form, although the spectra were influenced by the specific support material used. In addition, their acidic properties were evaluated using temperature-programmed oxidation of isopropyl amine. The differences in reaction rates between the samples reflect both the diversity in the amount of Bronsted acidic sites available for catalysis and dissimilarities in coking resistance. These two characteristics depend, in turn, on the type of support modifier used to prepare the catalyst.
C1 [Kwak, Ja Hun; Hu, Jian Zhi; Wang, Yong; Peden, Charles H. F.] Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA.
   [Herrera, Jose E.] Univ Western Ontario, Dept Chem & Biochem Engn, London, ON N6A 5B9, Canada.
RP Peden, CHF (reprint author), Pacific NW Natl Lab, Inst Interfacial Catalysis, MS K8-98,POB 999, Richland, WA 99352 USA.
EM chuck.peden@pnl.gov
RI Wang, Yong/C-2344-2013; Kwak, Ja Hun/J-4894-2014; Hu, Jian
   Zhi/F-7126-2012; 
OI Peden, Charles/0000-0001-6754-9928
FU U.S. Department of Energy (DOE), Office of Basic Energy Sciences,
   Division of Chemical Sciences [DE-AC06-76RLO-1830]
FX This work was supported by U.S. Department of Energy (DOE), Office of
   Basic Energy Sciences, Division of Chemical Sciences. The research was
   performed in the Environmental Molecular Sciences Laboratory, a national
   scientific user facility sponsored by the DOE Office of Biological and
   Environmental Research, and located at the Pacific Northwest National
   Laboratory. PNNL is operated for DOE by Battelle Memorial Institute
   under Contract# DE-AC06-76RLO-1830.
NR 48
TC 17
Z9 17
U1 0
U2 19
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1022-5528
J9 TOP CATAL
JI Top. Catal.
PD AUG
PY 2008
VL 49
IS 3-4
BP 259
EP 267
DI 10.1007/s11244-008-9081-4
PG 9
WC Chemistry, Applied; Chemistry, Physical
SC Chemistry
GA 386VE
UT WOS:000261909900018
ER

PT J
AU Taylor, LE
   Dai, ZY
   Decker, SR
   Brunecky, R
   Adney, WS
   Ding, SY
   Himmel, ME
AF Taylor, Larry E., II
   Dai, Ziyu
   Decker, Stephen R.
   Brunecky, Roman
   Adney, William S.
   Ding, Shi-You
   Himmel, Michael E.
TI Heterologous expression of glycosyl hydrolases in planta: a new
   departure for biofuels
SO TRENDS IN BIOTECHNOLOGY
LA English
DT Review
ID ACIDOTHERMUS-CELLULOLYTICUS ENDOGLUCANASE; SOLANUM-TUBEROSUM L.;
   GENE-EXPRESSION; TRANSGENE EXPRESSION; RECOMBINANT PROTEINS;
   MESSENGER-RNAS; HIGH-LEVEL; REGULATED EXPRESSION; CELLULOSIC ETHANOL;
   DEVELOPING GRAINS
AB The concept of expressing non-plant glycosyl hydrolase genes in plant tissue is nearly two decades old, yet relatively little work in this field has been reported. However, resurgent interest in technologies aimed at enabling processes that convert biomass to sugars and fuels has turned attention toward this intuitive solution. There are several challenges facing researchers in this field, including the development of better and more specifically targeted delivery systems for hydrolytic genes, the successful folding and post-translational modification of heterologous proteins and the development of cost-effective process strategies utilizing these transformed plants. The integration of these concepts, from the improvement of biomass production and conversion characteristics to the heterologous production of glycosyl hydrolases in a high yielding bioenergy crop, holds considerable promise for improving the lignocellulosic conversion of biomass to ethanol and subsequently to fuels.
C1 [Taylor, Larry E., II; Decker, Stephen R.; Brunecky, Roman; Adney, William S.; Ding, Shi-You; Himmel, Michael E.] Chem & Biosci Ctr, Natl Renewable Energy Lab, Golden, CO 80401 USA.
   [Dai, Ziyu] Pacific NW Natl Lab, Chem & Biol Proc Dev Grp, Richland, WA 99352 USA.
RP Himmel, ME (reprint author), Chem & Biosci Ctr, Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM Mike_Himmel@nrel.gov
RI Ding, Shi-You/O-1209-2013
NR 107
TC 77
Z9 77
U1 0
U2 19
PU ELSEVIER SCIENCE LONDON
PI LONDON
PA 84 THEOBALDS RD, LONDON WC1X 8RR, ENGLAND
SN 0167-7799
J9 TRENDS BIOTECHNOL
JI Trends Biotechnol.
PD AUG
PY 2008
VL 26
IS 8
BP 413
EP 424
DI 10.1016/j.tibtech.2008.05.002
PG 12
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA 336UW
UT WOS:000258391100003
PM 18579242
ER

PT J
AU Yu, ZQ
   Wang, CM
   Du, Y
   Thevuthasan, S
   Lyubinetsky, I
AF Yu, Z. Q.
   Wang, C. M.
   Du, Y.
   Thevuthasan, S.
   Lyubinetsky, I.
TI Reproducible tip fabrication and cleaning for UHVSTM
SO ULTRAMICROSCOPY
LA English
DT Article
DE scanning tunneling microscopy (STM); tip scanning instrument design and
   characterization
ID SCANNING-TUNNELING-MICROSCOPY; TUNGSTEN TIPS; W TIPS; STM
AB Several technical modifications related to the fabrication and ultra-high vacuum (UHV) treatments of the scanning tunneling microscope (STM) tips have been implemented to improve a reliability of the tip preparation for high-resolution STM. Widely used electrochemical etching drop-off technique has been further refined to enable a reproducible fabrication of the tips with a radius <= 3 nm. For tip. cleaning by a controllable UHV annealing, simple and flexible setup has been developed. Proper W tip preparation has been demonstrated via an imaging of the TiO(2) (110) surface atomic structure. (c) 2008 Published by Elsevier B.V.
C1 [Lyubinetsky, I.] Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA.
   Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA.
RP Lyubinetsky, I (reprint author), Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA.
EM igor.lyubinetsky@pnl.gov
FU US Department of Energy (DOE); Office of Basic Energy Sciences; Division
   of Chemical Sciences; W.R. Wiley Environmental Molecular Science
   Laboratory; Office of Biological and Environmental Research
FX We would like to thank J.T. Yates, jr., Z. Dohnalek, S. Mezhenny, R.J.
   Muha, and O. Bondarchuk for a rewarding collaboration at different
   stages of the project. This work was supported by the US Department of
   Energy (DOE), Office of Basic Energy Sciences, Division of Chemical
   Sciences and performed at W.R. Wiley Environmental Molecular Science
   Laboratory, a DOE User Facility sponsored by Office of Biological and
   Environmental Research.
NR 27
TC 30
Z9 32
U1 7
U2 52
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3991
J9 ULTRAMICROSCOPY
JI Ultramicroscopy
PD AUG
PY 2008
VL 108
IS 9
BP 873
EP 877
DI 10.1016/j.ultramic.2008.02.010
PG 5
WC Microscopy
SC Microscopy
GA 341WZ
UT WOS:000258747600010
PM 18439760
ER

PT J
AU Downing, KH
   Glaeser, RM
AF Downing, Kenneth H.
   Glaeser, Robert M.
TI Restoration of weak phase-contrast images recorded with a high degree of
   defocus: The "twin image" problem associated with CTF correction
SO ULTRAMICROSCOPY
LA English
DT Article
DE CTF correction; delocalization; twin image; phase-contrast EM
ID ELECTRON-MICROSCOPY
AB Relatively large values of objective-lens defocus must normally be used to produce detectable levels of image contrast for unstained biological specimens, which are generally weak phase objects. As a result, a subsequent restoration operation must be used to correct for oscillations in the contrast transfer function (CTF) at higher resolution. Currently used methods of CTF correction assume the ideal case in which Friedel mates in the scattered wave have contributed pairs of Fourier components that overlap with one another in the image plane. This "ideal" situation may be only poorly satisfied, or not satisfied at all, as the particle size gets smaller, the defocus value gets larger, and the resolution gets higher. We have therefore investigated whether currently used methods of CTF correction are also effective in restoring the single-sideband image information that becomes displaced (delocalized) by half (or more) the diameter of a particle of finite size. Computer simulations are used to show that restoration either by "phase flipping" or by multiplying by the CTF recovers only about half of the delocalized information. The other half of the delocalized information goes into a doubly defocused "twin" image of the type produced during optical reconstruction of an in-line hologram. Restoration with a Wiener filter is effective in recovering the delocalized information only when the signal-to-noise ratio (S/N) is orders of magnitude higher than that which exists in low-dose images of biological specimens, in which case the Wiener filter approaches division by the CTF (i.e. the formal inverse). For realistic values of the S/N, however, the "twin image" problem seen with a Wiener filter is very similar to that seen when either phase flipping or multiplying by the CTF is used for restoration. The results of these simulations suggest that CTF correction is a poor alternative to using a Zernike-type phase plate when imaging biological specimens, in which case the images can be recorded in a close-to-focus condition, and delocalization of high-resolution information is thus minimized. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Downing, Kenneth H.; Glaeser, Robert M.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA.
RP Glaeser, RM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA.
EM rmglaeser@lbl.gov
FU U.S. Department of Energy [DE-AC02-05CH11231]; NIH [GM51487, GM083039]
FX This work has been supported in part by the U.S. Department of Energy
   under contract DE-AC02-05CH11231, and by NIH grants GM51487 and
   GM083039.
NR 14
TC 11
Z9 11
U1 0
U2 14
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3991
J9 ULTRAMICROSCOPY
JI Ultramicroscopy
PD AUG
PY 2008
VL 108
IS 9
BP 921
EP 928
DI 10.1016/j.ultramic.2008.03.004
PG 8
WC Microscopy
SC Microscopy
GA 341WZ
UT WOS:000258747600016
PM 18508199
ER

PT J
AU Schroth, MH
   Oostrom, M
   Dobson, R
   Zeyer, J
AF Schroth, Martin H.
   Oostrom, Mart
   Dobson, Richard
   Zeyer, Josef
TI Thermodynamic model for fluid-fluid interfacial areas in porous media
   for arbitrary drainage-imbibition sequences
SO VADOSE ZONE JOURNAL
LA English
DT Article
ID GOVERNING MULTIPHASE FLOW; RELATIVE PERMEABILITY; WATER; SATURATION;
   PRESSURE; LIQUID; PORE; DISSOLUTION; HYSTERESIS; SYSTEMS
AB Fluid-fluid interfacial areas are important in controlling the rate of mass and energy transfer between fluid phases in porous media. We developed a modified thermodynamically based model (TBM) to predict fluid-fluid interfacial areas in porous media for arbitrary drainage-imbibition sequences. The TBM explicitly distinguishes between interfacial areas associated with continuous (free) and isolated (entrapped) nonwetting fluids. The model is restricted to two-fluid systems in which (i) no significant conversion of mechanical work into heat occurs, (ii) the wetting fluid completely wets the porous medium's solid surfaces, and (iii) no changes in interfacial area due to mass transfer between phases occur. We show example calculations for two different drainage-imbibition sequences in two porous media: a highly uniform silica sand and a well-graded silt. The TBM's predictions for interfacial area associated with free nonwetting fluid are identical to those of a previously published geometry-based model (GBM); however, predictions for interfacial area associated with entrapped nonwetting fluid are consistently larger in the TBM than in the GBM. Although a comparison of model predictions with experimental data is currently only possible to a limited extent, good general agreement was found for the TBM. As required model parameters are commonly used as inputs for or tracked during multi-fluid-flow simulations, the modified TBM may be easily incorporated in numerical codes.
C1 [Schroth, Martin H.; Dobson, Richard; Zeyer, Josef] ETH, Inst Biogeochem & Pollutant Dynam, CH-8092 Zurich, Switzerland.
   [Oostrom, Mart] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Schroth, MH (reprint author), ETH, Inst Biogeochem & Pollutant Dynam, CH-8092 Zurich, Switzerland.
EM martin.schroth@env.ethz.ch
NR 32
TC 3
Z9 3
U1 2
U2 8
PU SOIL SCI SOC AMER
PI MADISON
PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA
SN 1539-1663
J9 VADOSE ZONE J
JI Vadose Zone J.
PD AUG
PY 2008
VL 7
IS 3
BP 966
EP 971
DI 10.2136/vzj2007.0185
PG 6
WC Environmental Sciences; Soil Science; Water Resources
SC Environmental Sciences & Ecology; Agriculture; Water Resources
GA 325WA
UT WOS:000257618000011
ER

PT J
AU Demirkanli, DI
   Molz, FJ
   Kaplan, DI
   Fjeld, RA
AF Demirkanli, Deniz I.
   Molz, Fred J.
   Kaplan, Daniel I.
   Fjeld, Robert A.
TI A fully transient model for long-term plutonium transport in the
   Savannah River Site vadose zone: Root water uptake
SO VADOSE ZONE JOURNAL
LA English
DT Article
ID SOLUTE TRANSPORT; REDUCTION; ADSORPTION; OXIDATION; PLANTS; PU;
   LYSIMETERS; ACTINIDES; MIGRATION; GOETHITE
AB Improved understanding of flow and radionuclide transport in vadose zone sediments is fundamental to future planning involving radioactive materials. To that end, long-term experiments were conducted at the Savannah River Site in South Carolina, where a series of lysimeters containing sources of plutonium (Pu) in different oxidation states was placed in the shallow subsurface and exposed to the environment for 2 to 11 yr. Then, sediment Pu activity concentrations were measured along vertical cores taken from the lysimeters. Results showed anomalous activity distributions below the source, with significant migration of Pu above the source. A previously developed reactive transport model with surface-mediated redox reactions successfully simulated the lysimeter results below the source, assuming a steady, net downward flow. To simulate more realistic field conditions, a transient variably saturated flow model with root water uptake is developed and coupled to the reactive transport model. Overall, the fully transient analysis shows results nearly identical to the much simpler steady flow analysis. Thus, the surface-mediated redox hypothesis remains consistent with the below-source experimental data, the most important variable affecting transport being the oxidation state of the source material. However, none of the models studied could produce the upward Pu transport observed in the data. The hydraulic and chemical mechanisms tested as potential causes for upward migration-a modified root distribution, hysteresis, and air-content dependent oxidation-yielded little or no enhancement of the upward Pu movement. This suggests another transport mechanism such as root Pu uptake and translocation in the transpiration stream.
C1 [Demirkanli, Deniz I.; Molz, Fred J.; Fjeld, Robert A.] Clemson Univ, Dep Environm Engn & Earth Sci, LG Rich Environm Res Lab, Anderson, SC 29625 USA.
   [Kaplan, Daniel I.] Savannah River Natl Lab, Aiken, SC 29808 USA.
RP Molz, FJ (reprint author), Clemson Univ, Dep Environm Engn & Earth Sci, LG Rich Environm Res Lab, 342 Comp Ct, Anderson, SC 29625 USA.
EM fredi@clemson.edu
FU U. S. Department of Energy [DE-FG02-07ER64401]
FX This research was supported by the Office of Science (BER), U. S.
   Department of Energy, Grant No. DE-FG02-07ER64401.
NR 35
TC 14
Z9 14
U1 3
U2 12
PU SOIL SCI SOC AMER
PI MADISON
PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA
SN 1539-1663
J9 VADOSE ZONE J
JI Vadose Zone J.
PD AUG
PY 2008
VL 7
IS 3
BP 1099
EP 1109
DI 10.2136/vzj2007.0134
PG 11
WC Environmental Sciences; Soil Science; Water Resources
SC Environmental Sciences & Ecology; Agriculture; Water Resources
GA 337OE
UT WOS:000258444600015
ER

PT J
AU Newman, BD
   Graham, RC
AF Newman, Brent D.
   Graham, Robert C.
TI Species-level impacts on chaparral root zone hydrology
SO VADOSE ZONE JOURNAL
LA English
DT Article
ID WATER-MOVEMENT; DRY SOILS; 4 DECADES; ENVIRONMENTAL TRACERS; SOUTHERN
   CALIFORNIA; UNSATURATED ZONE; NEW-MEXICO; PINE; VEGETATION; DEUTERIUM
AB A set of four unconfined (earthen-walled) lysimeters in the San Dimas Experimental Forest near Los Angeles, CA, provides a unique opportunity to examine the effect of species-level vegetation on root zone hydrology under highly controlled experimental conditions. The 28.1-m(2) by 2.1-m deep lysimeters were specifically designed to minimize variation of all environmental conditions except vegetation. Monocultures of buckwheat ( Eriogonum fasciculatum Benth. var. foliolosum Nutt.), chamise (Adenstomata fasciculatum Hooke & Arn.), scrub oak ( Quercus dumosa Nutt.), and Coulter pine ( Pinus coulteri D. Don.) were planted in 1946. In 1997 two sets of soil cores were sampled from each lysimeter to evaluate species level effects resulting from 50 yr of growth. The cores were analyzed for water content, soil water potential, and pore water chloride. The chloride mass balance approach was used to estimate long-term average fluxes and residence times of water in the lysimeters. One core from each lysimeter was also analyzed for pore water stable isotope ( delta H-2) composition. Only small dfferences were observed between the four species in terms of the shapes of the depth profiles and the absolute values of the hydrologic characteristics and fluxes. However, some differences were statistically significant. For example, differences in some characteristics were found between the chamise and the other species. We also observed differences between the lowest aboveground biomass group ( buckwheat and chamise) versus the highest aboveground biomass group ( oak and pine). These results suggest that although species-and biomass-level differences in root zone hydrologic behavior appear to be minor, there are detectible differences in how these vegetation types affect the water budget in chaparral ecosystems.
C1 [Newman, Brent D.] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
   [Graham, Robert C.] Univ Calif Riverside, Dep Environm Sci, Soil & Water Sci Program, Riverside, CA 92521 USA.
RP Newman, BD (reprint author), IAEA, Isotope Hydrol Sect, POB 100,Wagramer Str 5, A-1400 Vienna, Austria.
EM b.newman@iaea.org
FU California University/Los Alamos National Laboratory collaborative
   research program (CULAR)
FX Funding for this project was provided through the California
   University/Los Alamos National Laboratory collaborative research program
   (CULAR). We would like to thank the USFS Pacific Southwest Research
   Station and Dave Larson, SDEF manager at the time of the study, for
   access to the sites. We also thank Jodi Johnson-Maynard, Kathy Rose,
   Jonathan Wald, and Tanja Williamson for their contributions and
   assistance. Finally, we appreciate the useful comments by two anonymous
   Vadose Zone Journal reviewers.
NR 39
TC 2
Z9 2
U1 1
U2 10
PU SOIL SCI SOC AMER
PI MADISON
PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA
SN 1539-1663
J9 VADOSE ZONE J
JI Vadose Zone J.
PD AUG
PY 2008
VL 7
IS 3
BP 1110
EP 1118
DI 10.2136/vzj2007.0105
PG 9
WC Environmental Sciences; Soil Science; Water Resources
SC Environmental Sciences & Ecology; Agriculture; Water Resources
GA 337OE
UT WOS:000258444600016
ER

PT J
AU Hardy, JS
   Weil, KS
AF Hardy, J. S.
   Weil, K. S.
TI Development of High-Temperature Air Braze Filler Metals for Use in
   Two-Step Joining and Sealing Processes
SO WELDING JOURNAL
LA English
DT Article
DE Air Brazing; Brazing; Electrochemical; Filler Metal; Fuel Cells;
   Palladium
ID OXIDE FUEL-CELLS; AG; ADDITIONS; SYSTEM; SOFCS
AB Air brazing is a new method of joining in which a predominantly metallic joint is formed directly in air without need of an inert cover gas or the use of a surface reactive flux. Prior work has shown that the resulting bond displays excellent strength, is inherently resistant to oxidation during high-temperature application (T similar to 750 degrees C), and offers long-term hermeticity at high temperatures when employed as a gas- or liquid-tight sealant. Because of these properties, air brazing is being considered for use in fabricating a variety of high-temperature devices, including planar solid oxide fuel cells (pSOFCs), oxygen and hydrogen gas separators, and boiling water pH sensors. However, many of these devices require a two-step sealing process. For example, in pSOFCs, the ceramic electrolyte membrane is first sealed to a metallic frame/separator plate to form a cell or repeat unit. These are then joined together in a second sealing step to build the final pSOFC stack. In order to preserve the integrity of the membrane-to-frame seals formed during cell fabrication, it is important that the corresponding sealing material does not melt or soften during stack sealing. The goal of the study presented here was to investigate the addition of palladium as a melt point elevator for a series of silver-copper oxide air braze filler metals and thereby produce a composition that could conceivably be used in the first part of a two-step air brazing process, with a lower melt point binary air braze composition employed in the second.
C1 [Hardy, J. S.; Weil, K. S.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Hardy, JS (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
RI Hardy, John/E-1938-2016
OI Hardy, John/0000-0002-1699-3196
FU U.S. Department of Energy, Office of Fossil Energy; Advanced Research
   and Technology Development Program
FX The authors would like to thank Nat Saenz, Shelly Carlson, and Jim
   Coleman for their assistance in the preparation of metallographic
   samples and SEM analysis work. This workwas supported by the U.S.
   Department of Energy, Office of Fossil Energy, Advanced Research and
   Technology Development Program.
NR 15
TC 0
Z9 0
U1 0
U2 11
PU AMER WELDING SOC
PI MIAMI
PA 550 N W LEJEUNE RD, MIAMI, FL 33126 USA
SN 0043-2296
J9 WELD J
JI Weld. J.
PD AUG
PY 2008
VL 87
IS 8
BP 195S
EP 201S
PG 7
WC Metallurgy & Metallurgical Engineering
SC Metallurgy & Metallurgical Engineering
GA 494HR
UT WOS:000269803000014
ER

PT J
AU Berhault, G
   De la Rosa, MP
   Mehta, A
   Yacaman, MJ
   Chianelli, RR
AF Berhault, Gilles
   De la Rosa, Myriam Perez
   Mehta, Apurva
   Yacaman, Miguel Jose
   Chianelli, Russell R.
TI The single-layered morphology of supported MoS2-based catalysts - The
   role of the cobalt promoter and its effects in the hydrodesulfurization
   of dibenzothiophene
SO APPLIED CATALYSIS A-GENERAL
LA English
DT Article
DE CoMo; hydrodesulfurization; cobalt promotion; hydrogenation; support
   interaction; selectivity
ID TRANSITION-METAL SULFIDES; RESOLUTION ELECTRON-MICROSCOPY; CO-MO/AL2O3
   HYDROPROCESSING CATALYSTS; HYDROTREATING CATALYSTS; CO-MO; CO-MO-AL2O3
   CATALYSTS; REACTION PATHWAYS; ACTIVE-SITES; THIOPHENE; ALUMINA
AB In order to completely resolve the morphology of supported hydrodesulfurization (HDS) catalysts, synchrotron X-ray scattering studies of silica- and alumina-supported MoS2 catalysts have been carried out and compared to results previously reported for their cobalt-promoted counterparts [J. Catal. 225 (2004) 288]. The present study is mainly centered on the structural role of cobalt and of support interactions and on their influence on the morphology and catalytic properties of these transition metal sulfide catalysts.
   Results showed that cobalt promoter strongly enhances the stacking height of MoS2 layers. However this effect is counterbalanced by hydrodesulfurization conditions that favor in an opposite way the formation of single slabs. Single slab morphology suggests that the vast majority of the sites on MoS2 layers are "rim" sites able to perform both hydrogenation and C-S bond cleavage steps. Moreover, the complete determination of the morphology of these catalysts allowed correlation of structural and catalytic properties for both supported MoS2 and CoMo catalysts. This approach led us to examine the respective influences of the MoS2 slab morphology and of support interactions on activity and selectivity properties of HDS MoS2-based catalysts. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Berhault, Gilles] Univ Lyon 2, Inst Rech Catalyse & Environm Lyon, CNRS, UMR 5256, F-69626 Villeurbanne, France.
   [De la Rosa, Myriam Perez; Chianelli, Russell R.] Univ Texas El Paso, Mat Res Technol Inst, El Paso, TX 79968 USA.
   [Mehta, Apurva] Stanford Univ, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
   [Yacaman, Miguel Jose] Univ Texas Austin, Dept Chem Engn, Austin, TX 78712 USA.
   [Yacaman, Miguel Jose] Univ Texas Austin, Ctr Nano & Mol Sci & Technol, Austin, TX 78712 USA.
RP Berhault, G (reprint author), Univ Lyon 2, Inst Rech Catalyse & Environm Lyon, CNRS, UMR 5256, Ave Albert Einstein, F-69626 Villeurbanne, France.
EM Gilles.Berhault@ircelyon.univ-lyon1.fr
RI jose yacaman, miguel/B-5622-2009
NR 68
TC 71
Z9 75
U1 5
U2 38
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0926-860X
J9 APPL CATAL A-GEN
JI Appl. Catal. A-Gen.
PD JUL 31
PY 2008
VL 345
IS 1
BP 80
EP 88
DI 10.1016/j.apcata.2008.04.034
PG 9
WC Chemistry, Physical; Environmental Sciences
SC Chemistry; Environmental Sciences & Ecology
GA 330RU
UT WOS:000257961300010
ER

PT J
AU Shekhawat, D
   Berry, DA
   Spivey, JJ
AF Shekhawat, Dushyant
   Berry, David A.
   Spivey, James J.
TI Reforming of liquid hydrocarbon fuels for fuel cell applications -
   Preface
SO CATALYSIS TODAY
LA English
DT Editorial Material
C1 [Shekhawat, Dushyant; Berry, David A.] US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA.
   [Spivey, James J.] Louisiana State Univ, Gordon A & Mary Cain Dept Chem Engn, Baton Rouge, LA 70803 USA.
RP Shekhawat, D (reprint author), US DOE, Natl Energy Technol Lab, 3610 Collins Ferry Rd, Morgantown, WV 26507 USA.
EM Dushyant.shekhawat@netl.doe.gov; David.berry@netl.doe.gov;
   jjspivey@lsu.edu
NR 0
TC 2
Z9 2
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5861
J9 CATAL TODAY
JI Catal. Today
PD JUL 31
PY 2008
VL 136
IS 3-4
BP 189
EP 189
DI 10.1016/j.cattod.2008.04.001
PG 1
WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 317JE
UT WOS:000257015200001
ER

PT J
AU Haynes, DJ
   Berry, DA
   Shekhawat, D
   Spivey, JJ
AF Haynes, Daniel J.
   Berry, David A.
   Shekhawat, Dushyant
   Spivey, James J.
TI Catalytic partial oxidation of n-tetradecane using pyrochlores: Effect
   of Rh and Sr substitution
SO CATALYSIS TODAY
LA English
DT Article; Proceedings Paper
CT Symposium on Reforming of Liquid Hydrocarbon Fuels for Fuel Cell
   Applications held at the 234th ACS National Meeting
CY AUG 19-23, 2007
CL Boston, MA
SP Amer Chem Soc
DE partial oxidation; rhodium; logistic fuel reforming; diesel; pyrochlore;
   catalyst deactivation
ID THERMAL BARRIER COATINGS; CONTACT-TIME REACTORS; AUXILIARY POWER UNITS;
   OXIDE FUEL-CELL; SYNTHESIS GAS; HIGHER HYDROCARBONS; REFORMING
   CATALYSTS; LIGHT PARAFFINS; COKE FORMATION; COATED FOAMS
AB The catalytic partial oxidation (CPOX) of transportation fuels into synthesis gas (H-2 + CO) for fuel cells is complicated by the large quantities of aromatics and sulfur-containing compounds commonly found in these fuels. Traditional supported metal catalysts are easily poisoned by these species which adsorb strongly onto the electron-rich metal clusters. The use of noble metal and/or oxide based catalyst systems may offer higher activity and stability, but only if the metal can be bound into a thermally stable structure. To that end, Rh metal was substituted into the structure of a lanthanum zirconate (LZ) pyrochlore to give La(2)RhyZr((2-y))O((7-xi)) (LRZ) to produce a strongly bound, well-dispersed metal which is active for CPOX. A second catalyst was prepared in which Sr was substituted for a portion of La in the LRZ structure, producing La(2-x)SrxRhyZr(2-y)O(7-xi) (LSRZ). Each of these pyrochlore catalysts, including the unsubstituted LZ, were characterized and screened for activity in the CPOX of n-tetradecane (TD), which is a surrogate for linear paraffins typical of diesel fuel. Results were compared to a commercial Rh/-gamma-Al2O3 catalyst. X-ray diffraction patterns of both the LZ and LRZ showed that each had the cubic unit-cell pyrochlore structure. However, substitution of Sr resulted in a binary perovskite-pyrochlore phase with a defect SrZrO3 phase. Hydrogen pulse chemisorption and temperature programmed reduction studies confirmed that Rh metal was substituted into the structure of the LRZ and LSRZ, and was reducible. Activity screening with the CPOX of TD showed that the Rh substituted in both LRZ and LSRZ is able to retain activity-producing essentially equilibrium synthesis gas yields, as was the Rh/-gamma-Al2O3. Temperature programmed oxidation experiments performed after the CPOX of TD demonstrated that the amount of carbon was quantitatively similar for each catalyst (roughly 0.3 g(carbon)/g(catalyst) after each run), with the exception of LSRZ, which had significantly less carbon (0.17 g(carbon)/g(catalyst)). It is speculated that improved oxygen ion mobility in the LSRZ material, which resulted from Sr substitution, was responsible for the reduction in carbon formation on the surface. Published by Elsevier B.V.
C1 [Haynes, Daniel J.] Parsons, South Pk, PA 15129 USA.
   [Haynes, Daniel J.; Berry, David A.; Shekhawat, Dushyant] US DOE, Natl Energy Tehchnol Lab, Morgantown, WV 26507 USA.
   [Haynes, Daniel J.; Spivey, James J.] Louisiana State Univ, Dept Chem Engn, Baton Rouge, LA 70803 USA.
RP Haynes, DJ (reprint author), Parsons, POB 618, South Pk, PA 15129 USA.
EM Daniel.Haynes@pp.netl.doe.gov; David.Berry@netl.doe.gov;
   Dushyant.Shekhawat@netl.doe.gov; jjspivey@lsu.edu
NR 64
TC 52
Z9 52
U1 1
U2 15
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5861
J9 CATAL TODAY
JI Catal. Today
PD JUL 31
PY 2008
VL 136
IS 3-4
BP 206
EP 213
DI 10.1016/j.cattod.2008.02.012
PG 8
WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 317JE
UT WOS:000257015200003
ER

PT J
AU Huang, XW
   King, DA
   Zheng, F
   Stenkamp, VS
   TeGrotenhuis, WE
   Roberts, BQ
   King, DL
AF Huang, Xiwen
   King, Dale A.
   Zheng, Feng
   Stenkamp, Victoria S.
   TeGrotenhuis, Ward E.
   Roberts, Benjamin Q.
   King, David L.
TI Hydrodesulfurization of JP-8 fuel and its microchannel distillate using
   steam reformate
SO CATALYSIS TODAY
LA English
DT Article; Proceedings Paper
CT Symposium on Reforming of Liquid Hydrocarbon Fuels for Fuel Cell
   Applications held at the 234th ACS National Meeting
CY AUG 19-23, 2007
CL Boston, MA
SP Amer Chem Soc
DE hydrodesulfurization; microchannel distillation; steam reformate; JP-8
   fuel
ID SELECTIVE ADSORPTION; HYDROGEN GENERATION; DIESEL FUEL; SULFUR;
   DESULFURIZATION; CATALYSTS; CELLS; GAS; TEMPERATURE
AB A field-deployable process for generation of clean desulfurized fuel from JP-8 feedstock is described. The process employs a compact hydrodesulfurization unit, operated in the vapor phase using steam reformate provided by an integrated steam reformer, as a replacement for hydrogen co-feed gas. The process includes a rnicrochannel distillation unit upstream of the hydrodesulfurizer unit, which allows use of a lighter feed fraction to be processed in place of the full JP-8. The novel microchannel distillation concept is described and performance data for the unit, operating as a rectifier, are provided. Since the generated light fraction fuel from rnicrochannel distillation contains fewer refractory sulfur components, the subsequent HDS process can readily achieve a significant sulfur reduction. The overall process can generate an ultra-clean JP-8 light fraction fuel with approximately 300 ppb sulfur residual. Hydrodesulfurization of full JP-8 fuel without the microchannel distillation unit was also studied. The effect of various operating parameters on the overall hydrodesulfurization performance, as well as the conversion of some individual sulfur components such as 2,3-dimethyl-benzothiophene, 2,3,5-trimethyl-benzothiophene and 2,3,7-trimethyl-benzothiophene, were investigated. Steam content in reformate at 30 mol% or less was, found to improve HDS performance compared with dry reformate, despite a decrease in hydrogen partial pressure. However, at even higher concentrations of steam, hydrodesulfurization performance decreased. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Huang, Xiwen; King, Dale A.; Zheng, Feng; Stenkamp, Victoria S.; TeGrotenhuis, Ward E.; Roberts, Benjamin Q.; King, David L.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP King, DL (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA.
EM david.king@pnl.gov
RI Zheng, Feng/C-7678-2009
OI Zheng, Feng/0000-0002-5427-1303
NR 21
TC 10
Z9 10
U1 0
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5861
J9 CATAL TODAY
JI Catal. Today
PD JUL 31
PY 2008
VL 136
IS 3-4
BP 291
EP 300
DI 10.1016/j.cattod.2008.01.011
PG 10
WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 317JE
UT WOS:000257015200014
ER

PT J
AU Davis, AB
AF Davis, A. B.
TI Multiple-scattering lidar from both sides of the clouds: Addressing
   internal structure
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID ANGLE IMAGING LIDAR; RADIATIVE-TRANSFER; GREEN-FUNCTION; OPTICAL DEPTH;
   THICKNESS; PARAMETERIZATION; STRATOCUMULUS; SIMULATIONS; RETRIEVALS;
   EXTINCTION
AB [1] Multiple-scattering ( a. k. a. `` off- beam'') lidar is an emerging technology in cloud remote sensing. It delivers, as in classic lidar ceilometry, cloud base altitude but also the cloud's physical thickness H as well as its optical depth t ( averaged over horizontal scales on the order of H). The value of t in fact must lie beyond the range accessible by standard ( i. e., single- scattering/ on- beam) lidar profiling, namely, up to 3 - 4. A refined diffusion- theoretical model is presented here for signals from multiple- scattering lidar and applied, on the one hand, to retrieval algorithm development and, on the other hand, signal- to- noise ratio ( SNR) estimation. SNRs are computed for LANL's ground- based Wide- Angle Imaging Lidar ( WAIL) system and NASA's space- based Lidar- In- space Technology Experiment ( LITE). The refinements are threefold and all about internal structure. First, the laser source is modeled as a collimated anisotropic exponentially distributed internal source rather than an isotropic point source at the cloud boundary; this opens the possibility of using d- Eddington rescaling to capture the forward peaked phase function more effectively within the diffusion framework. Second, stratification of the scattering coefficient is modeled as an increasing function of distance to cloud base; this strongly differentiates the signals when observed from above or from below. Finally, Cairns' rescaling is applied to this conservative scattering problem to account for the systematic effects of random ( turbulence- driven) internal variability at scales up to a few mean free paths.
C1 Los Alamos Natl Lab, Space & Remote Sensing Grp ISR2, Los Alamos, NM 87545 USA.
RP Davis, AB (reprint author), Los Alamos Natl Lab, Space & Remote Sensing Grp ISR2, Mail Stop B-244, Los Alamos, NM 87545 USA.
EM adavis@lanl.gov
NR 43
TC 5
Z9 5
U1 1
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
EI 2169-8996
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD JUL 31
PY 2008
VL 113
IS D14
AR D14S10
DI 10.1029/2007JD009666
PG 16
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 333KJ
UT WOS:000258151100003
ER

PT J
AU Velappan, N
   Clements, J
   Kiss, C
   Valero-Aracama, R
   Pavlik, P
   Bradbury, ARM
AF Velappan, N.
   Clements, J.
   Kiss, C.
   Valero-Aracama, R.
   Pavlik, P.
   Bradbury, A. R. M.
TI Fluorescence linked immunosorbant assays using microtiter plates
SO JOURNAL OF IMMUNOLOGICAL METHODS
LA English
DT Article
DE ELISA; FLISA; screening; phage antibody; fluorescence; fluorescent
   proteins
ID MYC ANTIBODY 9E10; PROTEIN; BINDING; IMMUNOASSAY; TECHNOLOGY; FRAGMENT;
   ANTIGEN
AB Fluorescence methods are widely used in the detection of antibodies and other binding events. However, as a general screening and detection tool in microtiter plates, enzyme linked immunosorbant (ELISA) methods predominate. In this paper we explore all parameters for effective use of fluorescence as a plate based detection method, including which microtiter plates can be used, the most effective means of immobilization, and the use of different fluorescent dyes or fluorescent proteins. These studies indicate that fluorescent immunosorbant assays (FLISA) can be used as effectively as enzymatic method in microtiter plate based screening methods, including the screening of phage antibody selections. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Velappan, N.; Clements, J.; Kiss, C.; Valero-Aracama, R.; Pavlik, P.; Bradbury, A. R. M.] Los Alamos Natl Lab, B Div, Los Alamos, NM 87545 USA.
RP Bradbury, ARM (reprint author), Los Alamos Natl Lab, B Div, TA-43,HRL 1,MS M888, Los Alamos, NM 87545 USA.
EM amb@lanl.gov
OI Velappan, Nileena/0000-0002-4488-9126; Bradbury,
   Andrew/0000-0002-5567-8172
NR 22
TC 7
Z9 7
U1 1
U2 10
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-1759
J9 J IMMUNOL METHODS
JI J. Immunol. Methods
PD JUL 31
PY 2008
VL 336
IS 2
BP 135
EP 141
DI 10.1016/j.jim.2008.04.007
PG 7
WC Biochemical Research Methods; Immunology
SC Biochemistry & Molecular Biology; Immunology
GA 335RN
UT WOS:000258307800007
PM 18514691
ER

PT J
AU Darling, SB
AF Darling, Seth B.
TI Isolating the effect of torsional defects on mobility and band gap in
   conjugated polymers
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID FIELD-EFFECT TRANSISTORS; DENSITY-FUNCTIONAL THEORY; ORGANIC
   SOLAR-CELLS; THIN-FILM; REGIOREGULAR POLY(3-HEXYLTHIOPHENE);
   OPTOELECTRONIC DEVICES; AMBIPOLAR TRANSPORT; CHARGE-TRANSPORT;
   MOLECULAR-WEIGHT; BUILDING-BLOCKS
AB Conjugated polymers represent a promising class of organic semiconductors with potential applications in a variety of molecular devices. Poly(3-alkylthiophene)s, in particular, are garnering interest due to their large charge carrier mobility and band gap in the visible region of the spectrum. Defects play a pivotal role in determining the performance of polymer electronics, and yet the function of specific types of defects is still largely unknown. Density functional theory calculations of alkyl-substituted oligothiophenes are used to isolate the effect of static inter-ring torsion defects on key parameters such as electronic coupling between rings and band gap. Results have potential implications both for the fundamental understanding of intramolecular charge transport and for improving processing in organic devices.
C1 Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Darling, SB (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM darling@anl.gov
NR 42
TC 58
Z9 58
U1 0
U2 10
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD JUL 31
PY 2008
VL 112
IS 30
BP 8891
EP 8895
DI 10.1021/jp8017919
PG 5
WC Chemistry, Physical
SC Chemistry
GA 330FW
UT WOS:000257926800009
PM 18597518
ER

PT J
AU Wang, LJ
   Guan, XY
   Tang, RK
   Hoyer, JR
   Wierzbicki, A
   De Yoreo, JJ
   Nancollas, GH
AF Wang, Lijun
   Guan, Xiangying
   Tang, Ruikang
   Hoyer, John R.
   Wierzbicki, Andrzej
   De Yoreo, James J.
   Nancollas, George H.
TI Phosphorylation of osteopontin is required for inhibition of calcium
   oxalate crystallization
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID O-GLYCOSYLATION SITES; CRYSTAL-NUCLEATION; POSTTRANSLATIONAL
   MODIFICATIONS; MONOHYDRATE CRYSTALLIZATION; HYDROXYAPATITE FORMATION;
   KIDNEY-STONE; GROWTH; IDENTIFICATION; MODULATION; PREDICTION
AB Under near-physiological pH, temperature, and ionic strength, a kinetics constant composition (CC) method was used to examine the roles of phosphorylation of a 14 amino acid segment (DDVDDTDDSHQSDE) corresponding to potential crystal binding domains within the osteopontin (OPN) sequence. The phosphorylated 14-mer OPN peptide segment significantly inhibits both the nucleation and growth of calcium oxalate monohydrate (COM), inhibiting nucleation by markedly increasing induction times and delaying subsequent growth by at least 50% at concentrations less than 44 nM. Molecular modeling predicts that the doubly phosphorylated peptide binds much more strongly to both (-101) and (010) faces of COM. The estimated binding energies are, in part, consistent with the CC experimental observations. Circular dichroism spectroscopy indicates that phosphorylation does not result in conformational changes in the secondary peptide structure, suggesting that the local binding of negatively charged phosphate side chains to crystal faces controls growth inhibition. These in vitro results reveal that the interactions between phosphorylated peptide and COM crystal faces are predominantly electrostatic, further supporting the importance of macromolecules rich in anionic side chains in the inhibition of kidney stone formation. In addition, the phosphorylation-deficient form of this segment fails to inhibit COM crystal growth up to concentrations of 1450 nM. However, at sufficiently high concentrations, this nonphosphorylated segment promotes COM nucleation. Dynamic light scattering (DLS) and small-angle X-ray scattering (SAXS) results confirm that aggregation of the nonphosphorylated peptide segment takes place in solution above 900 nM when the aggregated peptide particles may exceed a well-defined minimum size to be effective crystallization promoters.
C1 [Wang, Lijun; Guan, Xiangying; Nancollas, George H.] SUNY Buffalo, Dept Chem, Buffalo, NY 14260 USA.
   [Tang, Ruikang] Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China.
   [Tang, Ruikang] Zhejiang Univ, Ctr Biomat & Biopathways, Hangzhou 310027, Peoples R China.
   [Hoyer, John R.] Univ Delaware, Dept Biol Sci, Newark, DE 19716 USA.
   [Wierzbicki, Andrzej] Univ S Alabama, Dept Chem, Mobile, AL 36688 USA.
   [De Yoreo, James J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Nancollas, GH (reprint author), SUNY Buffalo, Dept Chem, Buffalo, NY 14260 USA.
EM ghn@buffalo.edu
RI GUAN, XIANGYING/F-4646-2010
FU NIDCR NIH HHS [DE03223, R37 DE003223, R01 DE003223-36, R01 DE003223]
NR 36
TC 37
Z9 43
U1 8
U2 38
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD JUL 31
PY 2008
VL 112
IS 30
BP 9151
EP 9157
DI 10.1021/jp804282u
PG 7
WC Chemistry, Physical
SC Chemistry
GA 330FW
UT WOS:000257926800041
PM 18611047
ER

PT J
AU Arslan, I
   Talin, AA
   Wang, GT
AF Arslan, Ilke
   Talin, A. Alec
   Wang, George T.
TI Three-dimensional visualization of surface defects in core-shell
   nanowires
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID LIGHT-EMITTING-DIODES; GAN NANOWIRES; HETEROSTRUCTURES; TOMOGRAPHY;
   ARRAYS
AB The high surface to volume ratio of nanowires makes them attractive for exploiting exotic materials properties and nanoengineering new device structures. To realize these goals, a fundamental understanding of the morphology and growth of the nanowires must be attained in three dimensions, because a two-dimensional projection image of these complex three-dimensional nanomaterials is not sufficient to describe their properties. Scanning transmission electron tomography is used here to obtain three-dimensional tomograms of GaN/AlN core-shell nanowires. This technique reveals the overall morphology and triangular shape of the nanowires, as well as their relation to the catalyst particle, with a resolution of similar to 1 nm in all three spatial dimensions. Defects that appear to be in the core of the nanowires in two-dimensional images are shown to be surface defects induced during growth, demonstrating the importance of this three-dimensional technique in analyzing nanomaterials.
C1 [Arslan, Ilke; Talin, A. Alec] Sandia Natl Labs, Livermore, CA 94550 USA.
   [Wang, George T.] Sandia Natl Labs, Albuquerque, NM 87123 USA.
RP Arslan, I (reprint author), Sandia Natl Labs, 7011 E Ave, Livermore, CA 94550 USA.
EM iarslan@sandia.gov
RI Wang, George/C-9401-2009
OI Wang, George/0000-0001-9007-0173
NR 13
TC 22
Z9 22
U1 2
U2 12
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD JUL 31
PY 2008
VL 112
IS 30
BP 11093
EP 11097
DI 10.1021/jp804194s
PG 5
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 330FZ
UT WOS:000257927100006
ER

PT J
AU Schrier, J
   Wang, LW
AF Schrier, Joshua
   Wang, Lin-Wang
TI Shape dependence of resonant energy transfer between semiconductor
   nanocrystals
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID QUANTUM-DOT SOLIDS; CDSE; COUPLINGS; PIGMENTS
AB We theoretically study the energy transfer between semiconductor nanocrystal dots and rods of CdSe using a semiempirical pseudopotential method (SEPM) description of the electronic structure of the nanocrystals, followed by evaluation of the Coulombic contribution to the energy transfer evaluated using the transition density cube (TDC) method. Our results are compared to the dipole-dipole theory of Forster to characterize the effects of nanocrystal shape, distance, and orientation. For the distances typical of nanorod solids, we find that the dipole-dipole theory underestimates the coupling between linearly oriented nanorods by as much as a factor of 2, and overestimates the coupling between parallel nanorods by as much as a factor of 3.
C1 [Schrier, Joshua; Wang, Lin-Wang] Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA.
RP Schrier, J (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA.
EM jschrier@lbl.gov
RI Schrier, Joshua/B-6838-2009
NR 26
TC 18
Z9 18
U1 0
U2 18
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD JUL 31
PY 2008
VL 112
IS 30
BP 11158
EP 11161
DI 10.1021/jp800489m
PG 4
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 330FZ
UT WOS:000257927100015
ER

PT J
AU Pan, H
   Poh, CK
   Zhu, Y
   Xing, G
   Chin, KC
   Feng, YP
   Lin, J
   Sow, CH
   Ji, W
   Wee, ATS
AF Pan, Hui
   Poh, Chee Kok
   Zhu, Yanwu
   Xing, Guichuan
   Chin, Kok Chung
   Feng, Yuan Ping
   Lin, Jianyi
   Sow, Chorng Haur
   Ji, Wei
   Wee, Andrew T. S.
TI Novel CdS nanostructures: Synthesis and field emission
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID NANOWIRES; ELECTROLUMINESCENCE; DRIVEN; GROWTH
AB Here, we reported the success in the synthesis of novel CdS nanostructures, nanotubes, core-sheath nanowires, and tube-wire nanojunctions, by thermal evaporation of US powder and purposed a model for the growth mechanism. The core-sheath nanowires consist of a crystalline core and amorphous sheath. The photoluminescence characterization indicated that the CdS nanostructures were crystalline and showed a narrow peak at 516.5 nm. In addition, the CdS nanostructures exhibited better field emission properties with a field enhancement factor of 1.5 x 10(4) and turn-on field of 1.4 V/mu m.
C1 [Pan, Hui; Zhu, Yanwu; Xing, Guichuan; Chin, Kok Chung; Feng, Yuan Ping; Lin, Jianyi; Sow, Chorng Haur; Ji, Wei; Wee, Andrew T. S.] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore.
   [Poh, Chee Kok; Lin, Jianyi] Inst Chem & Engn Sci, Singapore 627833, Singapore.
RP Pan, H (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA.
EM panh1@ornl.gov
RI Zhu, Yanwu/C-4171-2008; Pan, Hui/A-2702-2009; Poh, Chee Kok/E-8965-2011;
   Wee, Andrew/B-6624-2009; Zhu, Yanwu/C-8979-2012; Sow, Chorng
   Haur/G-1685-2012; Feng, Yuan Ping /A-4507-2012; Xing,
   Guichuan/J-3355-2012; JI, WEI/H-5795-2015
OI Yang, Shuman/0000-0002-9638-0890; Pan, Hui/0000-0002-6515-4970; Poh,
   Chee Kok/0000-0002-3175-8493; Wee, Andrew/0000-0002-5828-4312; Feng,
   Yuan Ping /0000-0003-2190-2284; JI, WEI/0000-0003-0303-0830
NR 17
TC 39
Z9 40
U1 0
U2 12
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD JUL 31
PY 2008
VL 112
IS 30
BP 11227
EP 11230
DI 10.1021/jp8023843
PG 4
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 330FZ
UT WOS:000257927100025
ER

PT J
AU Chowdhury, MH
   Pond, J
   Gray, SK
   Lakowicz, JR
AF Chowdhury, Mustafa H.
   Pond, James
   Gray, Stephen K.
   Lakowicz, Joseph R.
TI Systematic computational study of the effect of silver nanoparticle
   dimers on the coupled emission from nearby fluorophores
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID DIFFERENCE TIME-DOMAIN; MAXWELLS EQUATIONS; NUMERICAL-SOLUTION;
   LIGHT-SCATTERING; ENERGY-TRANSFER; ICE CRYSTALS; FLUORESCENCE; FIELD
AB We use the finite-difference time-domain method to predict how fluorescence is modified if the fluorophore is located between two silver nanoparticles of a dimer system. The fluorophore is modeled as a radiating point dipole with orientation defined by its polarization. When a fluorophore is oriented perpendicular to the metal surface, there is a large increase in total power radiated through a closed surface containing the dimer system, in comparison to the isolated fluorophore and the case of a fluorophore near a single nanoparticle. The increase in radiated power indicates increases in the relative radiative decay rates of the emission near the nanoparticles. The angle-resolved far-field distributions of the emission in a single plane are also computed. This is informative as many experimental conditions involve collection optics and detectors that collect the emission along a single plane. For fluorophores oriented perpendicular to the metal surfaces, the dimer systems lead to significant enhancements in the fluorescence emission intensity in the plane. In contrast, significant emission quenching occurs if the fluorophores are oriented parallel to the metal surfaces. We also examine the effect of the fluorophore on the near-field around the nanoparticles and correlate our results with surface plasmon excitations.
C1 [Chowdhury, Mustafa H.; Lakowicz, Joseph R.] Univ Maryland, Sch Med, Ctr Med Biotechnol, Ctr Fluorescence Spect, Baltimore, MD 21201 USA.
   [Pond, James] Lumer Solut Inc, Vancouver, BC V6C 1H2, Canada.
   [Gray, Stephen K.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
   [Gray, Stephen K.] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
RP Lakowicz, JR (reprint author), Univ Maryland, Sch Med, Ctr Med Biotechnol, Ctr Fluorescence Spect, 725 W Lombard St, Baltimore, MD 21201 USA.
EM lakowicz@cfs.umbi.umd.edu
FU NHGRI NIH HHS [R01 HG002655-06, R01 HG002655, R01 HG002655-01, R01
   HG002655-05, R01 HG002655-02, R01 HG002655-03, R01 HG002655-04A1]; NIBIB
   NIH HHS [R01 EB006521, R01 EB000682-01, R01 EB000682-03, R01
   EB006521-03, R01 EB006521-02, R01 EB000682-02, R01 EB000682-05, R01
   EB006521-01A1, R01 EB000682, R01 EB000682-04]
NR 29
TC 52
Z9 52
U1 2
U2 24
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD JUL 31
PY 2008
VL 112
IS 30
BP 11236
EP 11249
DI 10.1021/jp802414k
PG 14
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 330FZ
UT WOS:000257927100027
PM 19777130
ER

PT J
AU Kliewer, CJ
   Bieri, M
   Somorjai, GA
AF Kliewer, Christopher J.
   Bieri, Marco
   Somorjai, Gabor A.
TI Pyrrole hydrogenation over Rh(111) and Pt(111) single-crystal surfaces
   and hydrogenation promotion mediated by 1-methylpyrrole: A kinetic and
   sum-frequency generation vibrational spectroscopy study
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID METAL-CATALYSTS; GAS-PHASE; DERIVATIVES; BENZENE; SPECTRA; MOLECULES;
   PYRIDINE; ORIENTATION; BUTYLAMINE; NITROGEN
AB Sum-frequency generation (SFG) surface vibrational spectroscopy and kinetic measurements using gas chromatography have been used to study the adsorption and hydrogenation of pyrrole over both Pt(111) and Rh(l 11) single-crystal surfaces at Torr pressures (3 Torr pyrrole, 30 Torr H-2) to form pyrrolidine and the minor product butylamine. Over Pt(111) at 298 K it was found that pyrrole adsorbs in an upright geometry cleaving the N-H bond to bind through the nitrogen evidenced by SFG data. Over Rh(111) at 298 K pyrrole adsorbs in a tilted geometry relative to the surface through the a-aromatic system. A pyrroline surface reaction intermediate, which was not detected in the gas phase, was seen by SFG during the hydrogenation over both surfaces. Significant enhancement of the reaction rate was achieved over both metal surfaces by adsorbing I-methylpyrrole before reaction. SFG vibrational spectroscopic results indicate that reaction promotion is achieved by weakening the bonding between the N-containing products and the metal surface because of lateral interactions on the surface between 1-methylpyrrole and the reaction species, reducing the desorption energy of the products. It was found that the ring-opening product butylamine was a reaction poison over both surfaces, but this effect can be minimized by treating the catalyst surfaces with 1-methylpyrrole before reaction. The reaction rate was not enhanced with elevated temperatures, and SFG suggests desorption of pyrrole at elevated temperatures.
C1 [Somorjai, Gabor A.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM somorjai@socrates.berkeley.edu
RI Kliewer, Christopher/E-4070-2010
OI Kliewer, Christopher/0000-0002-2661-1753
NR 40
TC 23
Z9 23
U1 4
U2 27
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD JUL 31
PY 2008
VL 112
IS 30
BP 11373
EP 11378
DI 10.1021/jp8019123
PG 6
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 330FZ
UT WOS:000257927100047
ER

PT J
AU Henderson, MA
AF Henderson, Michael A.
TI Relationship of O-2 photodesorption in photooxidation of acetone on TiO2
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; MOLECULAR-OXYGEN; TIO2(110) SURFACE;
   TITANIUM-DIOXIDE; RUTILE TIO2(110); REDUCED TIO2(110); PHOTO-ADSORPTION;
   CARBOXYLIC-ACIDS; CHARGE-TRANSFER; DESORPTION
AB Organic photooxidation on TiO2 invariably involves the coexistence of organic species with oxygen on the surface at the same time. In the case of acetone and oxygen, both species exhibit their own interesting photochemistry on TiO2, but interdependences between the two are not understood. In this study, a rutile TiO2(110) surface possessing 7% surface oxygen vacancy sites is used as a model surface to probe the relationship between O-2 photodesorption and acetone photodecomposition. Temperature programmed desorption and photon stimulated desorption (PSD) measurements indicate that coadsorbed oxygen is essential to acetone photodecomposition on this surface; however, the form of oxygen (molecular or dissociative) involved is not known. The first steps in acetone photodecomposition on TiO2(110) involve thermal activation with oxygen to form an acetone diolate ((CH3)(2)COO) species followed by photochemical decomposition to adsorbed acetate (CH3COO) and an ejected CH3 radical that is detected in PSD. Depending on the surface conditions, O-2 PSD is also observed during the latter process. The time scales for the two PSD events (CH3 and O-2) are quite different, with the former occurring at similar to 10 times faster than the latter. By varying the preheating conditions or performing preirradiation on an O-2-exposed surface, it becomes clear that the two PSD events are uncorrelated. That is, the O-2 species responsible for 02 PSD is not a significant participant in the photochemistry of acetone on TiO2(110) and likely originates from a minority form of O-2 On the surface. The CH3 and O-2 PSD events do not appear to be in competition with each other, suggesting either that ample charge carriers exist under the experimental conditions employed or that different charge carriers or excitation mechanisms are involved.
C1 Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Henderson, MA (reprint author), Pacific NW Natl Lab, POB 999,MS K8-87, Richland, WA 99352 USA.
NR 49
TC 38
Z9 38
U1 7
U2 35
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD JUL 31
PY 2008
VL 112
IS 30
BP 11433
EP 11440
DI 10.1021/jp802551x
PG 8
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 330FZ
UT WOS:000257927100055
ER

PT J
AU Dabestani, R
   Kidder, M
   Buchanan, AC
AF Dabestani, Reza
   Kidder, Michelle
   Buchanan, A. C., III
TI Pore size effect on the dynamics of excimer formation for chemically
   attached pyrene on various silica surfaces
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID MESOPOROUS SILICA; SINGLE-SITE; GEL/AIR INTERFACE; PHENYL ETHER;
   PHOTOCHEMISTRY; GEL; PYROLYSIS; CHEMISTRY; CATALYSTS; PHOTODECOMPOSITION
AB Excimer formation by pyrene is a well-known process in solution and on solid surfaces. In solution, excimer formation is highly dependent on the concentration of pyrene. When adsorbed on solid surfaces (i.e., silica surfaces), pyrene has been shown to form ground-state pairs which lead to static excimer emission even at very low surface coverages as a result of a solvent pooling effect induced during solvent removal from the surface. Ground-state pairing on silica surfaces results from a pi-pi interaction between two adjacent pyrene molecules and can not be avoided even by slow evaporation of the solvent from the surface as the molecules diffuse toward one another during the process. One possible method to alleviate the pairing of pyrene molecules and hence the formation of excimer is to chemically attach pyrene molecules to the silica surface. Chemical attachment, however, does not allow effective control over the spacing between the pyrene molecules to avoid ground-state pairing. To circumvent this, spacer molecules can be incorporated onto the surface by chemical attachment to control the spacing between two adjacent pyrene molecules. Furthermore, by using surfaces that provide various pore sizes, it is possible to control the number of pyrene molecules that can be grafted onto and confined to the pore surface, as well as the steric environment in which the molecules can rotate. Cabosil (fumed silica with no pores) and mesoporous silica surfaces with various pore diameters (i.e., MCM-41) are ideal candidates to examine the feasibility of controlling the spacing between pyrene molecules on a flat surface and confined inside the pores using a cografted spacer molecule (i.e., biphenyl). We have now used such an approach to examine the extent of excimer formation as the ratio of spacer/pyrene molecules is varied on nonporous silica surfaces as well as mesoporous silica surfaces with various pore diameters. Our results show that a decrease in the ratio of spacer/pyrene is accompanied by an increase in the excimer emission on both nonporous and porous silicas. Furthermore, as the pore diameter is increased, an increase in the excimer emission is observed at similar spacer:pyrene grafting ratio. This suggests that a decrease in the separation of pyrene molecules on the surface, as the concentration of biphenyl spacer is decreased relative to pyrene, results in closer proximity of the neighboring pyrene molecules leading to the excimer emission. It is also observed that the alkyl side chain length (i.e., four carbon chain) bearing the pyrene fluorescent probe provides a more facile path for excimer formation by providing the flexibility needed for two pyrenes to reach and interact. When the alkyl side chain is removed and pyrene is directly attached to the surface, the contribution of excimer emission is diminished.
C1 [Dabestani, Reza; Kidder, Michelle; Buchanan, A. C., III] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Dabestani, R (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM dabestanir@oml.gov
NR 43
TC 18
Z9 18
U1 2
U2 23
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD JUL 31
PY 2008
VL 112
IS 30
BP 11468
EP 11475
DI 10.1021/jp803217p
PG 8
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 330FZ
UT WOS:000257927100060
ER

PT J
AU Lightstone, JM
   Patterson, MJ
   Liu, P
   Lofaro, JC
   White, MG
AF Lightstone, James M.
   Patterson, Melissa J.
   Liu, Ping
   Lofaro, John C., Jr.
   White, Michael G.
TI Characterization and reactivity of the Mo4S6+ cluster deposited on
   Au(111)
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID SCANNING-TUNNELING-MICROSCOPY; DENSITY-FUNCTIONAL THEORY; MOLYBDENUM
   CARBIDE NANOPARTICLES; CHEMICAL-PROPERTIES; MOS2 NANOCLUSTERS;
   MOLECULAR-DYNAMICS; CO ADSORPTION; GAS-PHASE; CATALYSTS; GROWTH
AB Mass-selected cluster deposition was used to investigate the chemical and thermal properties of the Mo4S6 cluster deposited onto a Au(111) substrate. Auger spectroscopy and (CO)-C-13 thermal desorption measurements demonstrate that the clusters behave independently up to coverages of similar to 0.15 ML, while at higher coverages, cluster crowding or island formation results in no net increase in Mo-atom adsorption sites. DFF calculations show that CO binding on the Mo-atom top site is strongly preferred over the side sites, with scaled binding energies in reasonable agreement with the experimentally derived binding energy of 0.7 eV. DFT calculations predict that the total adsorption energy for sequential addition of two CO molecules (top and side site) is nearly additive, whereas the addition of a third CO to another empty Mo side site is less stable. The latter is attributed to repulsive intercluster interactions and is consistent with the experimentally estimated sticking coefficient of 0.4 +/- 0.1. In contrast to CO, we were unable to detect any adsorption of NH3 onto the deposited cluster. The DFT calculations confirm these observations by predicting a very small NH3 adsorption energy to the Mo4S6/Au(111) supported cluster. The difference in adsorbate binding (CO, NH3) between the gas-phase and supported cluster highlights the role of the Au(111) substrate in modifying the electronic structure and chemical behavior of the supported cluster. Annealing of the Mo4S6/Au(111) surface above similar to 500 K was found to significantly reduce the CO uptake of the supported clusters. These data are consistent with diffusion of intact clusters along the Au surface and the formation of 2D islands. Because of the unique stoichiometry of the as-deposited Mo4S6 clusters, aggregates formed by cluster diffusion are expected to exhibit distinctly different chemical behavior compared to near-stoichiometric MoSx (x approximate to 2) platelet nanoclusters or amorphous thin films.
C1 [Lightstone, James M.; Patterson, Melissa J.; Lofaro, John C., Jr.; White, Michael G.] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
   [Liu, Ping; White, Michael G.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RP White, MG (reprint author), SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
EM mgwhite@bnl.gov
NR 51
TC 21
Z9 21
U1 2
U2 37
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD JUL 31
PY 2008
VL 112
IS 30
BP 11495
EP 11506
DI 10.1021/jp711938m
PG 12
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 330FZ
UT WOS:000257927100064
ER

PT J
AU Ma, BH
   Kwon, DK
   Narayanan, M
   Balachandran, U
AF Ma, Beihai
   Kwon, Do-Kyun
   Narayanan, Manoj
   Balachandran, U. (Balu)
TI Dielectric properties of PLZT film-on-foil capacitors
SO MATERIALS LETTERS
LA English
DT Article
DE dielectric property; PLZT film; ceramic capacitor; energy density;
   breakdown strength
ID TITANATE THIN-FILMS; STATISTICS; BREAKDOWN; CERAMICS
AB We have deposited Pb0.92La0.08Zr0.52Ti0.48O3 (PLZT) films on nickel foils to create film-on-foil capacitor sheets. Measurements with PLZT films on LaNiO3-buffered Ni foils yielded the following: relative permittivity approximate to 1300 and dielectric loss (tan delta) approximate to 0.05, leakage current density of 6.6 x 10(-9) A/cm(2) (at 25 degrees C) and 1.4 x 10(-8) A/cm(2) (at 150 degrees C) and mean breakdown field strength >2.4 MV/cm. Based on the hysteresis loop measurement, an energy storage density of approximate to 17 J/cm(3) was obtained for such a capacitor at 50% of the mean breakdown field. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Ma, Beihai; Kwon, Do-Kyun; Narayanan, Manoj; Balachandran, U. (Balu)] Argonne Natl Lab, Div Energy Syst, Argonne, IL 60439 USA.
RP Ma, BH (reprint author), Argonne Natl Lab, Div Energy Syst, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM bma@anl.gov
RI Narayanan, Manoj/A-4622-2011; Ma, Beihai/I-1674-2013
OI Ma, Beihai/0000-0003-3557-2773
NR 13
TC 40
Z9 40
U1 1
U2 18
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-577X
J9 MATER LETT
JI Mater. Lett.
PD JUL 31
PY 2008
VL 62
IS 20
BP 3573
EP 3575
DI 10.1016/j.matlet.2008.03.060
PG 3
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 322MD
UT WOS:000257378300033
ER

PT J
AU Yang, YF
   Fisk, Z
   Lee, HO
   Thompson, JD
   Pines, D
AF Yang, Yi-feng
   Fisk, Zachary
   Lee, Han-Oh
   Thompson, J. D.
   Pines, David
TI Scaling the Kondo lattice
SO NATURE
LA English
DT Article
ID HEAVY-FERMION BEHAVIOR; COMPOUND CERU2SI2; GROUND-STATE;
   SUPERCONDUCTIVITY; SYSTEM; MODEL; NMR
AB The origin of magnetic order in metals has two extremes: an instability in a liquid of local magnetic moments interacting through conduction electrons, and a spin- density wave instability in a Fermi liquid of itinerant electrons. This dichotomy between 'local- moment' magnetism and 'itinerant- electron' magnetism is reminiscent of the valence bond/ molecular orbital dichotomy present in studies of chemical bonding. The class of heavy- electron intermetallic compounds of cerium, ytterbium and various 5f elements bridges the extremes, with itinerant- electron magnetic characteristics at low temperatures that grow out of a high-temperature local- moment state(1). Describing this transition quantitatively has proved difficult, and one of the main unsolved problems is finding what determines the temperature scale for the evolution of this behaviour. Here we present a simple, semi-quantitative solution to this problem that provides a basic framework for interpreting the physics of heavy- electron materials and offers the prospect of a quantitative determination of the physical origin of their magnetic ordering and superconductivity. It also reveals the difference between the temperature scales that distinguish the conduction electrons' response to a single magnetic impurity and their response to a lattice of local moments, and provides an updated version of the well- known Doniach diagram(2).
C1 [Yang, Yi-feng; Lee, Han-Oh; Thompson, J. D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Yang, Yi-feng; Pines, David] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
   [Fisk, Zachary] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
RP Yang, YF (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM yifengyyf@gmail.com
NR 30
TC 110
Z9 111
U1 8
U2 54
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
J9 NATURE
JI Nature
PD JUL 31
PY 2008
VL 454
IS 7204
BP 611
EP 613
DI 10.1038/nature07157
PG 3
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 331QC
UT WOS:000258026500040
PM 18668102
ER

PT J
AU Walter, MJ
   Bulanova, GP
   Armstrong, LS
   Keshav, S
   Blundy, JD
   Gudfinnsson, G
   Lord, OT
   Lennie, AR
   Clark, SM
   Smith, CB
   Gobbo, L
AF Walter, M. J.
   Bulanova, G. P.
   Armstrong, L. S.
   Keshav, S.
   Blundy, J. D.
   Gudfinnsson, G.
   Lord, O. T.
   Lennie, A. R.
   Clark, S. M.
   Smith, C. B.
   Gobbo, L.
TI Primary carbonatite melt from deeply subducted oceanic crust
SO NATURE
LA English
DT Article
ID EARTHS LOWER MANTLE; HIGH-PRESSURE; TRANSITION ZONE; PHASE-RELATIONS;
   MATO-GROSSO; JUINA AREA; DIAMONDS; FLUIDS; METASOMATISM; SUBSOLIDUS
AB Partial melting in the Earth's mantle plays an important part in generating the geochemical and isotopic diversity observed in volcanic rocks at the surface(1). Identifying the composition of these primary melts in the mantle is crucial for establishing links between mantle geochemical 'reservoirs' and fundamental geodynamic processes(2). Mineral inclusions in natural diamonds have provided a unique window into such deep mantle processes(3-8). Here we provide experimental and geochemical evidence that silicate mineral inclusions in diamonds from Juina, Brazil, crystallized from primary and evolved carbonatite melts in the mantle transition zone and deep upper mantle. The incompatible trace element abundances calculated for a melt coexisting with a calcium-titanium- silicate perovskite inclusion indicate deep melting of carbonated oceanic crust, probably at transition- zone depths. Further to perovskite, calcic- majorite garnet inclusions record crystallization in the deep upper mantle from an evolved melt that closely resembles estimates of primitive carbonatite on the basis of volcanic rocks. Small- degree melts of subducted crust can be viewed as agents of chemical mass- transfer in the upper mantle and transition zone, leaving a chemical imprint of ocean crust that can possibly endure for billions of years.
C1 [Walter, M. J.; Bulanova, G. P.; Armstrong, L. S.; Blundy, J. D.; Lord, O. T.] Univ Bristol, Dept Earth Sci, Bristol BS8 1RJ, Avon, England.
   [Keshav, S.; Gudfinnsson, G.] Univ Bayreuth, Bayer Geoinst, D-95440 Bayreuth, Germany.
   [Lennie, A. R.] SERC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England.
   [Clark, S. M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
   [Smith, C. B.] Rio Tinto Min & Explorat Ltd, London W2 6LG, England.
   [Gobbo, L.] Rio Tinto Desinvolvimentos Min Ltda, BR-71200020 Brasilia, DF, Brazil.
RP Walter, MJ (reprint author), Univ Bristol, Dept Earth Sci, Queens Rd, Bristol BS8 1RJ, Avon, England.
EM m.j.walter@bris.ac.uk
RI Lord, Oliver/D-4663-2014; Clark, Simon/B-2041-2013
OI Lord, Oliver/0000-0003-0563-1293; Clark, Simon/0000-0002-7488-3438
NR 35
TC 96
Z9 106
U1 7
U2 67
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
J9 NATURE
JI Nature
PD JUL 31
PY 2008
VL 454
IS 7204
BP 622
EP U30
DI 10.1038/nature07132
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 331QC
UT WOS:000258026500043
PM 18668105
ER

PT J
AU Malinowski, SP
   Andrejczuk, M
   Grabowski, WW
   Korczyk, P
   Kowalewski, TA
   Smolarkiewicz, PK
AF Malinowski, Szymon P.
   Andrejczuk, Miroslaw
   Grabowski, Wojciech W.
   Korczyk, Piotr
   Kowalewski, Tomasz A.
   Smolarkiewicz, Piotr K.
TI Laboratory and modeling studies of cloud-clear air interfacial mixing:
   anisotropy of small-scale turbulence due to evaporative cooling
SO NEW JOURNAL OF PHYSICS
LA English
DT Article
ID ENVIRONMENT INTERFACE; NUMERICAL-SIMULATION; SPATIAL DIMENSIONS;
   BUOYANCY REVERSAL; CENTIMETER SCALE; CUMULUS CLOUDS; ENTRAINMENT;
   INSTABILITY; FLOWS; STRATOCUMULUS
AB Small-scale mixing between cloudy air and unsaturated clear air is investigated in numerical simulations and in a laboratory cloud chamber. Despite substantial differences in physical conditions and some differences in resolved scales of motion, results of both studies indicate that small-scale turbulence generated through cloud-clear air interfacial mixing is highly anisotropic. For velocity fluctuations, numerical simulations and cloud chamber observations demonstrate that the vertical velocity variance is up to a factor of two larger than the horizontal velocity variance. The Taylor microscales calculated separately for the horizontal and vertical directions also indicate anisotropy of turbulent eddies. This anisotropy is attributed to production of turbulent kinetic energy (TKE) by buoyancy forces due to evaporative cooling of cloud droplets at the cloud-clear air interface. Numerical simulations quantify the effects of buoyancy oscillations relative to the values expected from adiabatic and isobaric mixing, standardly assumed in cloud physics. The buoyancy oscillations result from microscale transport of liquid water due to the gravitational sedimentation of cloud droplets. In the particular modeling setup considered here, these oscillations contribute to about a fifth of the total TKE production.
C1 [Malinowski, Szymon P.] Univ Warsaw, Inst Geophys, PL-02093 Warsaw, Poland.
   [Andrejczuk, Miroslaw] Los Alamos Natl Lab, Los Alamos, NM USA.
   [Grabowski, Wojciech W.; Smolarkiewicz, Piotr K.] Natl Ctr Atmospher Res, Boulder, CO 80307 USA.
   [Korczyk, Piotr; Kowalewski, Tomasz A.] Polish Acad Sci, Inst Fundamental Technol Res, Warsaw, Poland.
RP Malinowski, SP (reprint author), Univ Warsaw, Inst Geophys, Pasteura 7, PL-02093 Warsaw, Poland.
RI Korczyk, Piotr/D-8820-2011; Malinowski, Szymon/A-5237-2010; Kowalewski,
   Tomasz /F-2055-2011
OI Korczyk, Piotr/0000-0002-5445-7933; Malinowski,
   Szymon/0000-0003-4987-7017; Kowalewski, Tomasz /0000-0002-3664-9659
NR 38
TC 16
Z9 16
U1 0
U2 9
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 1367-2630
J9 NEW J PHYS
JI New J. Phys.
PD JUL 31
PY 2008
VL 10
AR 075020
DI 10.1088/1367-2630/10/7/075020
PG 15
WC Physics, Multidisciplinary
SC Physics
GA 333VP
UT WOS:000258181200008
ER

PT J
AU Deur, A
   Burkert, V
   Chen, JP
   Korsch, W
AF Deur, A.
   Burkert, V.
   Chen, J. P.
   Korsch, W.
TI Determination of the effective strong coupling constant alpha(s.g1)
   (Q(2)) from CLAS spin structure function
SO PHYSICS LETTERS B
LA English
DT Article
ID QUANTUM CHROMODYNAMICS; EFFECTIVE CHARGES; SUM-RULE; QCD; NUCLEON;
   SCATTERING; BEHAVIOR; ALGEBRA; G(1)(N); PROTON
AB We present a new extraction of the effective strong coupling constant alpha(s,g1) (Q(2)). The result agrees with a previous determination and extends the measurement of the low and high Q(2) behavior of alpha(s,g1) (Q(2)) that was previously deduced from sum rules. In particular, it experimentally verifies the lack of Q(2)- dependence of alpha(s,g1) (Q(2)) in the low Q(2) limit. This fact is necessary for application of the AdS/CFT correspondence to QCD calculations. We provide a parameterization of alpha(s,g1) (Q(2)) that can equivalently be used to parameterize the Q(2)-dependence of the generalized Gerasimov-Drell-Hearn and Bjorken sums. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Deur, A.; Burkert, V.; Chen, J. P.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
   [Korsch, W.] Univ Kentucky, Lexington, KY 40506 USA.
RP Deur, A (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
EM deurpam@jlab.org
FU US Department of Energy (DOE); Jefferson Science Associates (JSA)
   [DE-AC05-84ER40150]
FX We are would like to thanks to S. Brodsky, S. Gardner. W. Melnitchouk,
   C. Roberts and P. Tandy for helpful discussions. We acknowledge S. Furui
   and P. Bowman for sending us their lattice results.; This work was
   supported by the US Department of Energy (DOE). The Jefferson Science
   Associates (JSA) operates the Thomas Jefferson National Accelerator
   Facility for the DOE under contract DE-AC05-84ER40150.
NR 46
TC 62
Z9 62
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
EI 1873-2445
J9 PHYS LETT B
JI Phys. Lett. B
PD JUL 31
PY 2008
VL 665
IS 5
BP 349
EP 351
DI 10.1016/j.physletb.2008.06.049
PG 3
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 340LR
UT WOS:000258647600006
ER

PT J
AU Rizzo, TG
AF Rizzo, Thomas G.
TI Identification of the origin of monojet signatures at the LHC
SO PHYSICS LETTERS B
LA English
DT Article
ID UNPARTICLE PHYSICS; EXTRA DIMENSIONS
AB Several new physics scenarios can lead to monojet signatures at the LHC. If such events are observed above the Standard Model background it will be important to identify their origin. In this Letter we compare and contrast these signatures as produced in two very different pictures: vector or scalar unparticle production in the scale-invariant/conformal regime and graviton emission in the Arkani-Hamed, Dimopoulos and Dvali extra-dimensional model. We demonstrate that these two scenarios can be distinguished at the LHC for a reasonable range of model parameters through the shape of their respective monojet and/or missing E-T distributions. (c) 2008 Elsevier B.V. All rights reserved.
C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
RP Rizzo, TG (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
EM rizzo@slac.stanford.edu
NR 38
TC 17
Z9 17
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
EI 1873-2445
J9 PHYS LETT B
JI Phys. Lett. B
PD JUL 31
PY 2008
VL 665
IS 5
BP 361
EP 368
DI 10.1016/j.physletb.2008.06.043
PG 8
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 340LR
UT WOS:000258647600009
ER

PT J
AU Albright, CH
   Rodejohann, W
AF Albright, Carl H.
   Rodejohann, Werner
TI Model-independent analysis of tri-bimaximal mixing: A softly-broken
   hidden or an accidental symmetry?
SO PHYSICS LETTERS B
LA English
DT Article
ID A(4) FAMILY SYMMETRY; NEUTRINO MASS MATRIX; CP VIOLATION; FERMION
   MASSES; QUARK MASSES; GUT; DEVIATIONS
AB To address the issue of whether tri-bimaximal mixing (TBM) is a softly-broken hidden or an accidental symmetry, we adopt a model-independent analysis in which we perturb a neutrino mass matrix leading to TBM in the most general way but leave the three texture zeros of the diagonal charged lepton mass matrix unperturbed. We compare predictions for the perturbed neutrino TBM parameters with those obtained from typical SO(10) grand unified theories with a variety of flavor symmetries. Whereas SO(10) GUTs almost always predict a normal mass hierarchy for the light neutrinos, TBM has a priori no preference for neutrino masses. We find, in particular for the latter, that the value of vertical bar U-e3 vertical bar is very sensitive to the neutrino mass scale and ordering. Observation of vertical bar U-e3 vertical bar(2) > 0.001 to 0.01 within the next few years would be incompatible with softly-broken TBM and a normal mass hierarchy and would suggest that the apparent TBM symmetry is an accidental symmetry instead. No such conclusions can be drawn for the inverted and quasi-degenerate hierarchy spectra. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Rodejohann, Werner] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany.
   [Albright, Carl H.] No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
   [Albright, Carl H.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Rodejohann, W (reprint author), Max Planck Inst Kernphys, Postfach 103980, D-69029 Heidelberg, Germany.
EM albright@fnal.gov; werner.rodejohann@mpi-hd.mpg.de
OI Rodejohann, Werner/0000-0003-1688-1028; Albright,
   Carl/0000-0002-2252-6359
FU Deutsche Forschungsgemeinschaft
FX One of the authors (C.H.A.) thanks Manfred Lindner and members of the
   Max-Planck-Institut ffir Kernphysik for their kind hospitality while the
   research reported here was carried out. The work of W.R. was supported
   in part by the Deutsche Forschungsgemeinschaft in the Transregio 27
   "Neutrinos and beyond-weakly interacting particles in physics,
   astrophysics and cosmology".
NR 72
TC 21
Z9 21
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
EI 1873-2445
J9 PHYS LETT B
JI Phys. Lett. B
PD JUL 31
PY 2008
VL 665
IS 5
BP 378
EP 383
DI 10.1016/j.physletb.2008.06.044
PG 6
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 340LR
UT WOS:000258647600012
ER

PT J
AU Bera, D
   Kuchibhatla, SVNT
   Azad, S
   Saraf, L
   Wang, CM
   Shutthanandan, V
   Nachimuthu, P
   McCready, DE
   Engelhard, MH
   Marina, OA
   Baer, DR
   Seal, S
   Thevuthasan, S
AF Bera, Debasis
   Kuchibhatla, Satyanarayana V. N. T.
   Azad, S.
   Saraf, L.
   Wang, C. M.
   Shutthanandan, V.
   Nachimuthu, P.
   McCready, D. E.
   Engelhard, M. H.
   Marina, O. A.
   Baer, D. R.
   Seal, S.
   Thevuthasan, S.
TI Growth and characterization of highly oriented gadolinia-doped ceria
   (111) thin films on zirconia (111)/sapphire (0001) substrates
SO THIN SOLID FILMS
LA English
DT Article
DE highly oriented gadolinia-doped ceria; ionic conductivity; solid oxide
   fuel cell; X-ray diffraction pole-figure analysis; transmission electron
   microscopy
ID OXIDE FUEL-CELLS; ELECTROLYTES; CONDUCTIVITY
AB Highly-oriented pure and gadolinia-doped ceria thin films have been grown on pure and zirconia (ZrO(2)) (111)-buffered sapphire (Al(2)O(3)) (0001) substrates using oxygen plasma-assisted molecular beam epitaxy to understand the oxygen ionic transport processes in ceria based oxide thin films. Gadolinia-doped ceria films grown on sapphire substrate show polycrystalline features due to structural deformations resulting from the large lattice mismatch between the Al(2)O(3) (0001) substrate and the ceria films. In contrast, the films, grown on a thin layer of ZrO(2) (111) buffered sapphire substrate, appear to be highly oriented in nature with predominant double domain (111) orientation. Oxygen ionic conductivity of these gadolinia-doped ceria films was measured as a function of gadolinium concentration and found to be efficient at relatively lower temperature operation compared to that of bulk polycrystalline, single crystalline yttria stabilized zirconia and gadolinia-doped polycrystalline ceria. Relative improvement in ionic conductivity of highly oriented gadolinia-doped ceria films (in the lower temperature regime) can be ascribed to the increased oxygen vacancies due to presence of Gd as well as high quality of the oriented thin films. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Bera, Debasis] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA.
   [Bera, Debasis; Kuchibhatla, Satyanarayana V. N. T.; Seal, S.] Univ Cent Florida, Dept Mech Mat & Aerosp Engn, Surface Engn & Nanotechnol Facil, Adv Mat Proc & Anal Ctr, Orlando, FL 32816 USA.
   [Bera, Debasis; Kuchibhatla, Satyanarayana V. N. T.; Azad, S.; Saraf, L.; Wang, C. M.; Shutthanandan, V.; Nachimuthu, P.; McCready, D. E.; Engelhard, M. H.; Baer, D. R.; Thevuthasan, S.] Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352 USA.
RP Bera, D (reprint author), Univ Florida, Dept Mat Sci & Engn, 202 Rhines Hall,PO 116400, Gainesville, FL 32611 USA.
EM dbera@mse.ufl.edu; sseal@mail.ucf.edu; theva@pnl.gov
RI Engelhard, Mark/F-1317-2010; Baer, Donald/J-6191-2013; 
OI Baer, Donald/0000-0003-0875-5961; Engelhard, Mark/0000-0002-5543-0812
NR 24
TC 11
Z9 11
U1 1
U2 11
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 JUL 31
PY 2008
VL 516
IS 18
BP 6088
EP 6094
DI 10.1016/j.tsf.2007.11.007
PG 7
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
   Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 331UE
UT WOS:000258037300027
ER

PT J
AU Varanasi, VG
   Besmann, TM
   Payzant, EA
   Starr, TL
   Anderson, TJ
AF Varanasi, V. G.
   Besmann, T. M.
   Payzant, E. A.
   Starr, T. L.
   Anderson, T. J.
TI Thermodynamic analysis and growth of ZrO(2) by chloride chemical vapor
   deposition
SO THIN SOLID FILMS
LA English
DT Article
DE chemical vapor deposition; zirconia; thermodynamic analysis
ID ZRCL4-H2-CO2-AR GAS-MIXTURES; YTTRIA-STABILIZED ZIRCONIA; THERMAL
   BARRIER COATINGS; STAGNATION POINT FLOW; CVD REACTOR; KINETICS; DESIGN;
   DIOXIDE; MICROSTRUCTURE; SYSTEM
AB Equilibrium calculations were used to optimize conditions for the chemical vapor deposition (CVD) of zirconia. The results showed zirconia formation would occur at high oxygen to zirconium atomic ratios (> 4), low hydrogen to carbon ratios (< 10), low pressures (< 105 Pa) and high temperatures (> 800 degrees C). Using these calculations as a guide, single-phase monoclinic zirconia coatings were deposited onto 2-cm diameter alpha-alumina substrates. The maximum growth rate achieved was 2.46 mg cm(-2) h(-1). (C) 2007 Elsevier B.V. All rights reserved.
C1 [Varanasi, V. G.; Besmann, T. M.; Payzant, E. A.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
   [Starr, T. L.] Univ Louisville, Louisville, KY 40292 USA.
   [Anderson, T. J.] Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA.
RP Varanasi, VG (reprint author), Univ Calif San Francisco, Sch Dent, Dept Prevent & Restorat Dent Sci, 707 Parnassus Ave,D2254, San Francisco, CA 94143 USA.
EM venu.varanasi@ucsf.edu; besmanntm@oml.gov; payzanta@oml.gov;
   thomas.starr@louisville.edu; tim@nervm.nerdc.ufl.edu
RI Payzant, Edward/B-5449-2009
OI Payzant, Edward/0000-0002-3447-2060
NR 36
TC 5
Z9 5
U1 0
U2 6
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 JUL 31
PY 2008
VL 516
IS 18
BP 6133
EP 6139
DI 10.1016/j.tsf.2007.11.020
PG 7
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
   Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 331UE
UT WOS:000258037300034
ER

PT J
AU Libera, JA
   Elam, JW
   Pellin, MJ
AF Libera, J. A.
   Elam, J. W.
   Pellin, M. J.
TI Conformal ZnO coatings on high surface area silica gel using atomic
   layer deposition
SO THIN SOLID FILMS
LA English
DT Article
DE atomic layer deposition; ZnO; silica gel; catalysis
ID CATALYTIC MEMBRANES; ZINC-OXIDE; GROWTH; EPITAXY; CHEMISTRY; ALUMINA;
   VAPOR; FILMS; ZRO2
AB Silica gel is a mesoporous form of silica with a high specific surface area that is widely used as a support material for heterogeneous catalysis. In this study, we use atomic layer deposition (ALD) methods to deposit ZnO layers onto silica gel supports. ZnO ALD was performed using alternating exposures of diethyl zinc (DEZ) and water to coat 1 g quantities of silica gel in a conventional viscous flow reactor. The coated materials were analyzed using weight gain, X-ray fluorescence, X-ray diffraction, energy dispersive X-ray analysis, and scanning and transmission electron microscopy. These measurements revealed that the silica gel support could be conformally coated using reactant exposure times of similar to 90 s. The ALD ZnO was amorphous for films deposited using < 5 ALD cycles, but became hexagonal, nanocrystalline ZnO for films deposited using > 5 ALD cycles. In addition to the ZnO films, we also discovered that metallic Zn was deposited in the silica gel using very large DEZ exposures and deposition temperatures > 150 degrees C. The metallic Zn phase begins to form as soon as the ZnO ALD surface reactions have saturated, indicating that the Zn growth is strongly dependent on the availability of excess DEZ precursor. Published by Elsevier B.V.
C1 [Libera, J. A.; Elam, J. W.; Pellin, M. J.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Elam, JW (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM jelam@anl.gov
RI Pellin, Michael/B-5897-2008
OI Pellin, Michael/0000-0002-8149-9768
NR 30
TC 45
Z9 45
U1 3
U2 40
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 JUL 31
PY 2008
VL 516
IS 18
BP 6158
EP 6166
DI 10.1016/j.tsf.2007.11.044
PG 9
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
   Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 331UE
UT WOS:000258037300038
ER

PT J
AU Garcia, MA
   Ali, MN
   Parsons-Moss, T
   Ashby, PD
   Nitsche, H
AF Garcia, Mitch Andre
   Ali, Mazhar Nawaz
   Parsons-Moss, Tashi
   Ashby, Paul David
   Nitsche, Heino
TI Metal oxide films produced by polymer-assisted deposition (PAD) for
   nuclear science applications
SO THIN SOLID FILMS
LA English
DT Article
DE metal oxide; target preparation; transactinide; polymer-assisted
   deposition; atomic force microscopy
ID TARGETS; ELECTRODEPOSITION
AB The Polymer-assisted Deposition (PAD) method was used to create crack-free homogenous metal oxide films for use as targets in nuclear science applications. Metal oxide films of europium, thulium, and hafnium were prepared as models for actinide oxides. Films produced by a single application of PAD were homogenous and uniform and ranged in thickness from 30 to 320 nm. The reapplication of the PAD method (six times) with a 10% by weight hafhium(IV) solution resulted in an equally homogeneous and uniform film with a total thickness of 600 min. (c) 2007 Elsevier B.V. All rights reserved.
C1 [Garcia, Mitch Andre; Ali, Mazhar Nawaz; Nitsche, Heino] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Garcia, Mitch Andre; Ali, Mazhar Nawaz; Parsons-Moss, Tashi; Nitsche, Heino] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
   [Ashby, Paul David] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Garcia, MA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM mitch@berkeley.edu
RI Garcia, Mitch/G-2413-2010; Ali, Mazhar/C-6473-2013
OI Ali, Mazhar/0000-0002-1129-6105
NR 9
TC 9
Z9 10
U1 1
U2 16
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 JUL 31
PY 2008
VL 516
IS 18
BP 6261
EP 6265
DI 10.1016/j.tsf.2007.11.127
PG 5
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
   Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 331UE
UT WOS:000258037300053
ER

PT J
AU Liu, F
   Romero, MJ
   Jones, KM
   Norman, AG
   Al-Jassim, MM
   Inns, D
   Aberle, AG
AF Liu, F.
   Romero, M. J.
   Jones, K. M.
   Norman, A. G.
   Al-Jassim, M. M.
   Inns, D.
   Aberle, A. G.
TI Intragrain defects in polycrystalline silicon thin-film solar cells on
   glass by aluminum-induced crystallization and subsequent epitaxy
SO THIN SOLID FILMS
LA English
DT Article
DE thin film solar cells; polycrystalline silicon; renewable energy;
   intragrain defects
ID ION-ASSISTED DEPOSITION; AMORPHOUS-SILICON; LAYER EXCHANGE; SI FILMS;
   TEMPERATURE; LUMINESCENCE
AB The origin of intragrain defects in polycrystalline silicon films grown by ion-assisted deposition (IAD) on aluminum-induced crystallization seed layers on glass is investigated. The microstructure of these polycrystalline Si films is bimodal, with near defect-free regions of [001] orientation along the growth direction and highly defective regions containing smaller grains of [111] orientation. In the defective regions, the dominant structural defects are twins in the seed layer and stacking faults in the IAD-grown epitaxial layer, both lying on {111} planes. The stacking faults originate at the seed layer surface due to surface imperfections, indicating that the quality of the seed layer surface plays an important role for the quality of the epitaxial Si film. We find a clear correlation between the structural crystal quality and defect-related radiative transitions at sub-bandgap wavelengths. Two dominant defect levels (similar to 0.20 eV and similar to 0.29 eV below the conduction band edge) are observed and identified as impurity-related. Published by Elsevier B.V.
C1 [Liu, F.; Romero, M. J.; Jones, K. M.; Norman, A. G.; Al-Jassim, M. M.] Natl Ctr Photovolta, Natl Renewable Energy Lab, Golden, CO 80401 USA.
   [Inns, D.; Aberle, A. G.] Univ New S Wales, ARC Photovolta Ctr Excellence, Sydney, NSW 2052, Australia.
RP Liu, F (reprint author), Natl Ctr Photovolta, Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM fude_liu@nrel.gov
RI Norman, Andrew/F-1859-2010; Liu, Fude/E-9873-2010
OI Norman, Andrew/0000-0001-6368-521X; 
NR 22
TC 15
Z9 15
U1 0
U2 9
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 JUL 31
PY 2008
VL 516
IS 18
BP 6409
EP 6412
DI 10.1016/j.tsf.2008.01.020
PG 4
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
   Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 331UE
UT WOS:000258037300077
ER

PT J
AU Roy, B
   Mahan, AH
   Wang, Q
   Reed, R
   Readey, DW
   Ginley, DS
AF Roy, B.
   Mahan, A. H.
   Wang, Q.
   Reed, R.
   Readey, D. W.
   Ginley, D. S.
TI Monitoring of crystallization and the effect of the deposition rate,
   hydrogen content and annealing process on the crystallization of hot
   wire chemical vapor deposited hydrogenated amorphous silicon (a-Si : H)
   films
SO THIN SOLID FILMS
LA English
DT Article
DE HWCVD; a-Si : H; hydrogen content of films; deposition rate; RTA; CTA
ID SOLID-PHASE CRYSTALLIZATION; POLYCRYSTALLINE SILICON; TEMPERATURE;
   IMPLANTATION; KINETICS; GROWTH
AB The crystallization behavior of the a-Si:H films grown by hot wire chemical vapor deposition has been studied using X-ray diffraction (XRD) and reflectance spectroscopy. The surface morphology of the films does not change during annealing. It has been observed that the different deposition rates, hydrogen contents, or annealing processes do not affect the nucleation mechanism or orientation of the films differently. The full width at half maxima of the XRD (111) peak of high deposition rate (similar to 100 angstrom/s) films is observed to decrease when the same completely crystallized films (at 650 degrees C) are treated at increased temperatures up to 900 degrees C. Furthermore, films with different hydrogen contents and grown at a lower deposition rate (similar to 5 angstrom/s) showed similar crystal growth activation energies upon rapid thermal annealing. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Roy, B.; Readey, D. W.] Colorado Sch Mines, Dept Met & Mat Engn, Golden, CO 80401 USA.
   [Mahan, A. H.; Wang, Q.; Reed, R.; Ginley, D. S.] NREL, Natl Ctr Photovolta, Golden, CO 80401 USA.
RP Roy, B (reprint author), POB 3698,801 Leroy Pl, Socorro, NM 87801 USA.
EM pikuray@yahoo.com
NR 25
TC 16
Z9 17
U1 1
U2 13
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 JUL 31
PY 2008
VL 516
IS 18
BP 6517
EP 6523
DI 10.1016/j.tsf.2008.03.003
PG 7
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
   Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 331UE
UT WOS:000258037300094
ER

PT J
AU Ohnuki, T
   Ozaki, T
   Kozai, N
   Nankawa, T
   Sakamoto, F
   Sakai, T
   Suzuki, Y
   Francis, AJ
AF Ohnuki, T.
   Ozaki, T.
   Kozai, N.
   Nankawa, T.
   Sakamoto, F.
   Sakai, T.
   Suzuki, Y.
   Francis, A. J.
TI Concurrent transformation of Ce(III) and formation of biogenic manganese
   oxides
SO CHEMICAL GEOLOGY
LA English
DT Article
DE cerium; biotransformation; Mn-oxidizing bacteria; oxidation; biogenic
   manganese-dioxide formation
ID RARE-EARTH-ELEMENTS; OXIDATION; ADSORPTION; CERIUM; GROUNDWATERS;
   ENVIRONMENT; COMPLEXES; XANES; REDOX; JAPAN
AB We examined the changes in the chemical states of Ce(III) during the formation of manganese oxide occasioned by Mn(II)-oxidizing bacteria, BY86 strain, isolated from the Yunotaki Mn mine, Hokkaido, Japan. The bacteria were incubated with (i) 0.1 mM Ce(III), (ii) I mM Mn(II), and, (iii) 0.1 mM Ce(III) and 1 mM Mn (II) for 288 h at 30 degrees C, and the oxidation states of Ce and Mn then were measured by X-ray Absorption Near Edge Structure (XANES). We also determined the elemental distributions in the bacteria and precipitates by Scanning-Proton Induced X-ray Emission (S-PIXE). In the absence of Mn(II), the concentration of Ce rapidly decreased to 0.03 mM, increased to 0.06 mM, and then remained there. In the presence of Mn(II), the concentration of Ce fell rapidly to approximately 0.015 mM, and then rose to 0.05 mM, and finally declined to 0.005; a black precipitate containing Mn was formed during this last phase. Mn-bearing precipitates also formed in the medium containing only Mn. XANES analysis of the precipitate revealed the presence of Mn(III) and (IV), and Ce (III) and (IV). Ce (III) was detected in solution, and with the bacteria. S-PIXE analyses of the precipitates showed that Ce was associated with Mn, and not with the bacteria. These results suggest that the precipitation of Ce is preceded by its accumulation by the bacterium, followed by its oxidization to Ce(IV) by the Mn(III, IV)-containing precipitates that the bacteria generate. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Ohnuki, T.; Ozaki, T.; Kozai, N.; Nankawa, T.; Sakamoto, F.; Suzuki, Y.] Japan Atom Energy Agcy, Adv Sci Res Ctr, Ibaraki 3191195, Japan.
   [Suzuki, Y.] Nagoya Univ, Grad Sch Engn, Dept Mat Phys & Energy Engn, Nagoya, Aichi 4648601, Japan.
   [Francis, A. J.] Brookhaven Natl Lab, Dept Environm Sci, Upton, NY 11973 USA.
RP Ohnuki, T (reprint author), Japan Atom Energy Agcy, Adv Sci Res Ctr, 2-4 Shirokata, Ibaraki 3191195, Japan.
EM ohnuki.toshihiko@jdea.go.jp
NR 28
TC 19
Z9 22
U1 4
U2 21
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2541
EI 1878-5999
J9 CHEM GEOL
JI Chem. Geol.
PD JUL 30
PY 2008
VL 253
IS 1-2
BP 23
EP 29
DI 10.1016/j.chemgeo.2008.03.013
PG 7
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 334JM
UT WOS:000258218100002
ER

PT J
AU Tokushima, T
   Harada, Y
   Takahashi, O
   Senba, Y
   Ohashi, H
   Pettersson, LGM
   Nilsson, A
   Shin, S
AF Tokushima, T.
   Harada, Y.
   Takahashi, O.
   Senba, Y.
   Ohashi, H.
   Pettersson, L. G. M.
   Nilsson, A.
   Shin, S.
TI High resolution X-ray emission spectroscopy of liquid water: The
   observation of two structural motifs
SO CHEMICAL PHYSICS LETTERS
LA English
DT Review
ID DENSITY-FUNCTIONAL THEORY; HYDROGEN-BOND NETWORK; RADIAL-DISTRIBUTION
   FUNCTIONS; PAIR CORRELATION-FUNCTIONS; ABSORPTION SPECTRA;
   MOLECULAR-DYNAMICS; CORE-HOLE; TEMPERATURE-DEPENDENCE; SCATTERING
   EXPERIMENTS; CHEMISORBED MOLECULES
AB The structure of liquid water is presently under intense debate. We summarize the historical development of the present description of water and the controversy surrounding the X-ray absorption spectroscopy (XAS) study of Wernet et al. [Ph. Wernet et al., Science 304 ( 2004) 995]. In order to provide further insight into the connection between X-ray spectroscopy and the structure of the hydrogen bonding network, we report new data comprising high resolution oxygen K-edge X-ray emission spectra (XES) of liquid water. We observe two distinct narrow lone-pair derived peaks, assigned, respectively, to tetrahedral and strongly distorted hydrogen-bonded species; the assignment is based on comparison with ice and gas phase spectra, temperature dependent measurements, excitation energy dependence and theoretical simulations. We estimate a 2: 1 ratio between distorted and tetrahedral species at room temperature and discuss what this implies in connection to the previous XAS study and in terms of liquid water structure. (c) 2008 Published by Elsevier B. V.
C1 [Nilsson, A.] Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA.
   [Tokushima, T.; Harada, Y.; Shin, S.] RIKEN Spring 8, Sayo, Hyogo 6795148, Japan.
   [Takahashi, O.] Hiroshima Univ, Dept Chem, Higashihiroshima 7398526, Japan.
   [Senba, Y.; Ohashi, H.] JASRI Spring 8, Sayo, Hyogo 6795198, Japan.
   [Pettersson, L. G. M.; Nilsson, A.] Univ Stockholm, AlbaNova, FYSIKUM, S-10691 Stockholm, Sweden.
   [Shin, S.] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan.
RP Nilsson, A (reprint author), Stanford Synchrotron Radiat Lab, POB 20450, Stanford, CA 94309 USA.
EM nilsson@slac.stanford.edu; sshin@spring8.or.jp
RI Nilsson, Anders/E-1943-2011; Pettersson, Lars/F-8428-2011; Pettersson,
   Lars/J-4925-2013; Tokushima, Takashi/B-9127-2009
OI Nilsson, Anders/0000-0003-1968-8696; Pettersson,
   Lars/0000-0003-1133-9934; Tokushima, Takashi/0000-0003-2586-0712
NR 113
TC 196
Z9 203
U1 11
U2 71
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
EI 1873-4448
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD JUL 30
PY 2008
VL 460
IS 4-6
BP 387
EP 400
DI 10.1016/j.cplett.2008.04.077
PG 14
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 327YY
UT WOS:000257765600001
ER

PT J
AU Jeong, HK
   Colakerol, L
   Jin, MH
   Glans, PA
   Smith, KE
   Lee, YH
AF Jeong, Hae-Kyung
   Colakerol, Leyla
   Jin, Mei Hua
   Glans, Per-Anders
   Smith, Kevin E.
   Lee, Young Hee
TI Unoccupied electronic states in graphite oxides
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID CARBON-FIBER SURFACES; FUNCTIONAL-GROUPS; SPECTROSCOPY; NANOPLATELETS;
   CHEMISTRY
AB Unoccupied electronic states of graphite oxides with different oxidation times have been investigated using X-ray absorption spectroscopy (XAS) in total electron yield (TEY) and total fluorescence yield (TFY) modes. The graphite oxides exhibit graphite-like sp(2) states with additional electronic states originating from functional groups. The intensity of the pi* state decreases as the atomic ratio O:C increases. The intensity ratio of carboxyl to pi* states in XAS TEY mode corresponds to the area ratio of carboxyl to sp(2) carbon in X-ray photoelectron spectroscopy. In addition, the two modes in XAS can identify electronic states of functional groups originating from surface or bulk regions. (c) 2008 Elsevier B. V. All rights reserved.
C1 [Jeong, Hae-Kyung; Jin, Mei Hua; Lee, Young Hee] Sungkyunkwan Univ, Sungkyunkwan Adv Inst Nanotechnol, Ctr Nanotubes & Nanostructured Composites, BK Phys Div 21, Suwon 440746, South Korea.
   [Colakerol, Leyla; Smith, Kevin E.] Boston Univ, Dept Phys, Boston, MA 02215 USA.
   [Glans, Per-Anders] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Lee, YH (reprint author), Sungkyunkwan Univ, Sungkyunkwan Adv Inst Nanotechnol, Ctr Nanotubes & Nanostructured Composites, BK Phys Div 21, Suwon 440746, South Korea.
EM leeyoung@skku.edu
RI Lee, Young Hee/A-5424-2013; Glans, Per-Anders/G-8674-2016
NR 25
TC 64
Z9 65
U1 0
U2 12
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD JUL 30
PY 2008
VL 460
IS 4-6
BP 499
EP 502
DI 10.1016/j.cplett.2008.06.042
PG 4
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 327YY
UT WOS:000257765600022
ER

PT J
AU Jacobsen, B
   Yin, QZ
   Moynier, F
   Amelin, Y
   Krot, AN
   Nagashima, K
   Hutcheon, ID
   Palme, H
AF Jacobsen, Benjamin
   Yin, Qing-zhu
   Moynier, Frederic
   Amelin, Yuri
   Krot, Alexander N.
   Nagashima, Kazuhide
   Hutcheon, Ian D.
   Palme, Herbert
TI Al-26-Mg-26 and Pb-207-Pb-206 systematics of Allende CAIs: Canonical
   solar initial Al-26/Al-27 ratio reinstated
SO EARTH AND PLANETARY SCIENCE LETTERS
LA English
DT Article
DE early Solar System chronology; short-lived radioactivity; Allende
   meteorite; Ca-Al rich inclusions; U-Pb age; Al-26/Al-27 ratio
ID REFRACTORY INCLUSIONS; ISOTOPE FRACTIONATION; PLANET FORMATION; AL-26;
   METEORITES; CHONDRULES; URANIUM; ORIGIN; LEAD; MG
AB The precise knowledge of the initial Al-26/Al-27 ratio [(Al-26/Al-27)(o)] is crucial if we are to use the very first solid objects formed in our Solar System, calcium-aluminum-rich inclusions (CAIs) as the "time zero" age-anchor and guide future work with other short-lived radio-chronometers in the early Solar System, as well as determining the inventory of heat budgets from radioactivities for early planetary differentiation. New high-precision multi-collector inductively-coupled plasma mass spectrometry (MC-ICP-MS) measurements of Al-27/Mg-24 ratios and Mg-isotopic compositions of nine whole-rock CAIs (six mineralogically characterized fragments and three micro-drilled inclusions) from the CV carbonaceous chondrite, Allende yield a well-defined Al-26-Mg-26 fossil isochron With an (Al-26/Al-27)(o) of (5.23 +/- 0.13)x10(-5). Internal mineral isochrons obtained for three of these CAIs (A44A. AJEF. and A43) are consistent with the whole-rock CAI isochron. The mineral isochron of AJEF with (Al-26/Al-27)(0)=(4.96 +/- 0.25) x 10(-5), anchored to our precisely determined absolute Pb-207-Pb-206 age of 4567.60 +/- 0.36 Ma for the same mineral separates, reinstate the "canonical, (Al-26/Al-27), of 5x10(-5) for the early Solar System. The uncertainty in (Al-26/Al-27)(o) corresponds to a maximum time span of 20 Ka (thousand years), suggesting that the Allende CAI formation events were culminated within this time span. Although all Allende CAIs studied experienced multistage formation history, including melting and evaporation in the solar nebula and post-crystallization alteration likely on the asteroidal parent body, the Al-26-Mg-26 and U-Pb-isotopic systematics of the mineral separates and bulk CAIs behaved largely as closed-system since their formation. Our data do not Support the supra-canonical Al-26/Al-27 ratio of individual minerals or their mixtures in CV CAIs, suggesting that the supracanonical Al-26/Al-27 ratio in the CV CAIs may have resulted from post-crystallization inter-mineral redistribution of Mg isotopes within an individual inclusion. This redistribution must be volumetrically minor in order to satisfy the mass balance of the precisely defined bulk CAI and bulk mineral data obtained by MC-ICP-MS.
   The radiogenic Pb-208*/Pb-206* ratio obtained as a by-product from the Pb-Pb age dating is used to estimate time-integrated Th-232/U-238 ratio (K value) of CAIs. Limited K variations among the minerals within a single CAI, contrasted by much larger variations among the bulk CAIs, suggest Th/U fractionation occurred prior to crystallization of igneous CAIs. If interpreted as primordial heterogeneity, the kappa value can be used to calculate the mean age of the interstellar dust from which the CAIs condensed. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Jacobsen, Benjamin; Yin, Qing-zhu; Moynier, Frederic] Univ Calif Davis, Dept Geol, Davis, CA 95616 USA.
   [Amelin, Yuri] Geol Survey Canada, Ottawa, ON K1A 0E8, Canada.
   [Krot, Alexander N.; Nagashima, Kazuhide] Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822 USA.
   [Hutcheon, Ian D.] Lawrence Livermore Natl Lab, Glenn T Seaborg Inst, Livermore, CA 94551 USA.
   [Palme, Herbert] Univ Cologne, Inst Geol & Mineral, D-50674 Cologne, Germany.
RP Yin, QZ (reprint author), Univ Calif Davis, Dept Geol, Davis, CA 95616 USA.
EM yin@geology.ucdavis.edu
RI Yin, Qing-Zhu/B-8198-2009; Moynier, Frederic/I-2785-2012
OI Yin, Qing-Zhu/0000-0002-4445-5096; 
FU LLNI [UEPP B556868]; NASA Cosmochemistry [NNG05GN22G]; Origins of Solar
   Systems [NNG05GN03G]; NASA [NNH04AB471]; NASA Origins of Solar Systems
   [NNX07A181 G]
FX We would like to thank Jerry Wasserburg for "lively debates" and
   valuable advice on the subject over the past year. We thank Julie
   Perressini for her help with mineral separation by magnetic
   susceptibility at the GSC. Constructive reviews by Joel Baker and Noriko
   Kita, and efficient editorial handling by Rick Carlson are most
   appreciated. We acknowledge the Supports by UEPP B556868 grant from
   LLNI, NASA Cosmochemistry (NNG05GN22G) and Origins of Solar Systems
   (NNG05GN03G) grants to Q.Z.Y., and NASA grant NNH04AB471 to I.D. H., and
   NASA Origins of Solar Systems (NNX07A181 G) to A.N.K This work was
   performed in part under the auspices of the US Department of Energy by
   the University of California, Lawrence Livermore National Laboratory,
   under contract W-7405-Eng-48. This is UCD-ICP-MS Contribution #0021.
NR 57
TC 200
Z9 202
U1 2
U2 32
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0012-821X
J9 EARTH PLANET SC LETT
JI Earth Planet. Sci. Lett.
PD JUL 30
PY 2008
VL 272
IS 1-2
BP 353
EP 364
DI 10.1016/j.epsl.2008.05.003
PG 12
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 347DD
UT WOS:000259119900034
ER

PT J
AU Cody, GD
   Alexander, CMO
   Yabuta, H
   Kilcoyne, ALD
   Araki, T
   Ade, H
   Dera, R
   Fogel, M
   Militzer, B
   Mysen, BO
AF Cody, G. D.
   Alexander, C. M. O'D.
   Yabuta, H.
   Kilcoyne, A. L. D.
   Araki, T.
   Ade, H.
   Dera, R.
   Fogel, M.
   Militzer, B.
   Mysen, B. O.
TI Organic thermometry for chondritic parent bodies
SO EARTH AND PLANETARY SCIENCE LETTERS
LA English
DT Article
DE chondrite; parent bodies; insoluble organic matter; thermal
   metamorphism; C-XANES; NMR; Raman
ID X-RAY-ABSORPTION; CARBONACEOUS CHONDRITES; PRIMITIVE METEORITES; ALLENDE
   METEORITE; THERMAL HISTORY; CM CHONDRITES; CO CHONDRITES; MATTER;
   GRAPHITE; METAMORPHISM
AB A unique spectroscopic feature has been identified in a Study of twenty-five different samples of meteoritic insoluble organic matter (IOM) spanning multiple chemical classes, groups, and petrologic types, using carbon X-ray Absorption Near Edge Structure (XANES) spectroscopy. The intensity of this feature, a 1s-sigma* exciton, appears to provide a precise measure of parent body metamorphism. The intensity of this exciton is also shown to correlate well with a large negative paramagnetic shift observed through solid state C-13 NMR. Experiments reveal that upon heating primitive IOM is transformed into material that is indistinguishable from that in thermally processed chondrites, including the development of the 1s-sigma* exciton. A thermo-kinetic expression is derived front the experimental data that allows the intensity of the 1s-sigma* exciton to be used to estimated the effective temperature integrated over time. A good correlation is observed between the intensity of the 1s-sigma* exciton and previously published microRaman spectral data. These data provide a self-consistent organic derived temperature scale for the purpose of calibrating Raman based thermometric expressions. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Cody, G. D.; Yabuta, H.; Dera, R.; Fogel, M.; Militzer, B.; Mysen, B. O.] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA.
   [Alexander, C. M. O'D.] Carnegie Inst Washington, Dept Terr Magnetism, Washington, DC 20015 USA.
   [Kilcoyne, A. L. D.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
   [Araki, T.; Ade, H.] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA.
RP Cody, GD (reprint author), Carnegie Inst Washington, Geophys Lab, 5251 Broad Branch Rd NW, Washington, DC 20015 USA.
EM g.cody@gl.ciw.edu
RI Dera, Przemyslaw/F-6483-2013; Ade, Harald/E-7471-2011; Alexander,
   Conel/N-7533-2013; Yabuta, Hikaru/M-9041-2014; Kilcoyne,
   David/I-1465-2013
OI Alexander, Conel/0000-0002-8558-1427; Yabuta,
   Hikaru/0000-0002-4625-5362; 
FU NASA Astrobiology Institute; Origins of the Solar System Program; W. M.
   Keck Foundation; National Science Foundation; Carnegie Institution of
   Washington
FX The authors gratefully acknowledge financial support through the NASA
   Astrobiology Institute and Origins of the Solar System Program. All NMR
   experiments were performed at the W. M. Keck Solid State NMR facility at
   the Geophysical Laboratory that received financial support through the
   W. M. Keck Foundation, the National Science Foundation, and the Carnegie
   Institution of Washington. The Advanced Light Source is a DOE supported
   facility. We are grateful for thoughtful reviews provided by Adrian
   Brearley and Michael Zolensky that helped improve the quality of this
   manuscript.
NR 63
TC 100
Z9 100
U1 4
U2 34
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0012-821X
J9 EARTH PLANET SC LETT
JI Earth Planet. Sci. Lett.
PD JUL 30
PY 2008
VL 272
IS 1-2
BP 446
EP 455
DI 10.1016/j.epsl.2008.05.008
PG 10
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 347DD
UT WOS:000259119900044
ER

PT J
AU Freifeld, BM
   Finsterle, S
   Onstott, TC
   Toole, P
   Pratt, LM
AF Freifeld, B. M.
   Finsterle, S.
   Onstott, T. C.
   Toole, P.
   Pratt, L. M.
TI Ground surface temperature reconstructions: Using in situ estimates for
   thermal conductivity acquired with a fiber-optic distributed thermal
   perturbation sensor
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID BOREHOLE TEMPERATURES; PERMAFROST; INVERSION; CLIMATE; CANADA
AB We have developed a borehole methodology to estimate formation thermal conductivity in situ with a spatial resolution of one meter. In parallel with a fiber-optic distributed temperature sensor (DTS), a resistance heater is deployed to create a controlled thermal perturbation. The transient thermal data is inverted to estimate the formation's thermal conductivity. We refer to this instrumentation as a Distributed Thermal Perturbation Sensor (DTPS), given the distributed nature of the DTS measurement technology. The DTPS was deployed in permafrost at the High Lake Project Site (67 degrees 22'N, 110 degrees 50'W), Nunavut, Canada. Based on DTPS data, a thermal conductivity profile was estimated along the length of a wellbore. Using the thermal conductivity profile, the baseline geothermal profile was then inverted to estimate a ground surface temperature history (GSTH) for the High Lake region. The GSTH exhibits a 100-year long warming trend, with a present-day ground surface temperature increase of 3.0 +/- 0.8 degrees C over the long-term average.
C1 [Freifeld, B. M.; Finsterle, S.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [Onstott, T. C.] Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA.
   [Pratt, L. M.] Indiana Univ, Dept Geol Sci, Bloomington, IN 47405 USA.
   [Toole, P.] Zinifex Canada Inc, Thunder Bay, ON P7B 6M7, Canada.
RP Freifeld, BM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, MS 90-1116,1 Cyclotron Rd, Berkeley, CA 94720 USA.
RI Finsterle, Stefan/A-8360-2009; Freifeld, Barry/F-3173-2010
OI Finsterle, Stefan/0000-0002-4446-9906; 
NR 22
TC 38
Z9 38
U1 1
U2 16
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
EI 1944-8007
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD JUL 30
PY 2008
VL 35
IS 14
AR L14309
DI 10.1029/2008GL034762
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 333JR
UT WOS:000258149300005
ER

PT J
AU Brewer, M
AF Brewer, M.
TI Obtaining smooth mesh transitions using vertex optimization
SO INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
LA English
DT Article
DE smoothing; remesh; ALE; mesh; quadrilateral; hexahedral
ID JACOBIAN MATRIX; QUALITY; QUANTITIES; FRAMEWORK; NORM
AB Mesh optimization has proven to be an effective way to improve mesh quality for arbitrary Lagrangian Eulerian (ALE) simulations. To date, however, most of the focus has been on improving the geometric shape of individual elements, and these methods often do not result in smooth transitions in element size or aspect ratio across groups of elements. We present an extension to the mean ratio optimization that addresses this problem and yields smooth transitions within regions and across regions in the ALE simulation. While this method is presented in the context of ALE simulations, it is applicable to a wider set of applications that require mesh improvement, including the mesh generation process. Published in 2007 by John Wiley & Sons, Ltd.
C1 Sandia Natl Labs, Albuquerque, NM 87123 USA.
RP Brewer, M (reprint author), Sandia Natl Labs, M-S 0376, Albuquerque, NM 87123 USA.
EM mbrewer@sandia.gov
NR 29
TC 3
Z9 3
U1 0
U2 3
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0029-5981
J9 INT J NUMER METH ENG
JI Int. J. Numer. Methods Eng.
PD JUL 30
PY 2008
VL 75
IS 5
BP 555
EP 576
DI 10.1002/nme.2261
PG 22
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
   Applications
SC Engineering; Mathematics
GA 329XE
UT WOS:000257903100003
ER

PT J
AU Roberts, W
   Pervin, M
AF Roberts, W.
   Pervin, Muslema
TI Heavy baryons in a quark model
SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A
LA English
DT Review
DE heavy baryon; quark model
ID DOUBLY CHARMED BARYONS; SPECTRAL SUM-RULES; POTENTIAL MODELS; HYPERFINE
   INTERACTIONS; SEMILEPTONIC DECAYS; STATIC PROPERTIES; BOTTOM BARYONS;
   SPECTROSCOPY; MASSES; HADRONS
AB A quark model is applied to the spectrum of baryons containing heavy quarks. The model gives masses for the known heavy baryons that are in agreement with experiment, but for the doubly-charmed baryon Xi(cc), the model prediction is too heavy. Mixing between the Xi(Q) and Xi(Q)' states is examined and is found to be small for the lowest lying states. In contrast with this, mixing between the Xi(bc) and Xi(bc)' states is found to be large, and the implication of this mixing for properties of these states is briefly discussed. We also examine heavy-quark spin-symmetry multiplets, and find that many states in the model can be placed in such multiplets. We compare our predictions with those of a number of other authors.
C1 [Roberts, W.] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA.
   [Pervin, Muslema] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Roberts, W (reprint author), Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA.
EM wroberts@fsu.edu; muslema@phy.anl.gov
NR 112
TC 119
Z9 120
U1 0
U2 3
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0217-751X
EI 1793-656X
J9 INT J MOD PHYS A
JI Int. J. Mod. Phys. A
PD JUL 30
PY 2008
VL 23
IS 19
BP 2817
EP 2860
DI 10.1142/S0217751X08041219
PG 44
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 342IX
UT WOS:000258778900001
ER

PT J
AU Denton, MH
   Borovsky, JE
AF Denton, M. H.
   Borovsky, J. E.
TI Superposed epoch analysis of high-speed-stream effects at geosynchronous
   orbit: Hot plasma, cold plasma, and the solar wind
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID GEOMAGNETIC STORMS; SHEET MATERIAL; REGION; ANALYZER; DENSITY; ORIGIN;
   ACCESS; TAIL
AB Superposed epoch analyses of magnetospheric plasma analyzer ( MPA) data from Los Alamos National Laboratory (LANL) satellites are performed to reveal the density, temperature and flow velocity behavior of the hot ion plasma (0.1 - 45 keV), the hot electron plasma (0.03 - 45 keV) and the cold ion plasma (1 - 100 eV) at geosynchronous orbit following the arrival of high speed solar wind streams at the dayside magnetopause. The analyses reveal three striking features. (1) The arrival of a high density solar wind plasma at the leading edge of a high speed solar wind stream induces a sharp enhancement in magnetospheric convection which leads to the delivery of a hot, dense `` plug'' of fresh plasma sheet ions and electrons to the inner magnetosphere. On average, this superdense plasma is observed at geosynchronous orbit for similar to 20 h following convection onset. There follows an extended period when exceptionally hot plasma sheet ions and electrons of more usual density are continually convected to the inner magnetosphere - a environment that persists at geosynchronous orbit while the high speed stream prevails. (2) Flow velocities and convection speeds of eroded cold plasma moving toward the dayside magnetopause are calculated from MPA statistical analyses. Average convection speeds of 8 - 12 km s(-1) are typical in plume material moving sunwards following the arrival of high speed solar wind streams at the magnetopause. (3) The density of plume material convecting to the dayside magnetopause during high speed streams which follow very calm periods (Kp similar to 0) is around double that during high speed streams following periods when higher levels of convection persist (Kp similar to 2).
C1 [Denton, M. H.] Univ Lancaster, Dept Commun Syst, InfoLab21, Lancaster LA1 4WA, England.
   [Borovsky, J. E.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Denton, MH (reprint author), Univ Lancaster, Dept Commun Syst, InfoLab21, Lancaster LA1 4WA, England.
EM m.denton@lancaster.ac.uk
OI Denton, Michael/0000-0002-1748-3710
NR 54
TC 48
Z9 49
U1 1
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD JUL 30
PY 2008
VL 113
IS A7
AR A07216
DI 10.1029/2007JA012998
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 333MK
UT WOS:000258156400004
ER

PT J
AU Sherrington, D
AF Sherrington, David
TI A simple spin glass perspective on martensitic shape-memory alloys
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID TWEED; TRANSFORMATIONS; SYSTEMS; MODEL; IONS
AB A brief qualitative mapping is given between austenite, tweed and twinned phases of martensite alloys and corresponding paramagnetic, spin glass and periodic phases in spin glass alloys.
C1 [Sherrington, David] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3NP, England.
   [Sherrington, David] Santa Fe Inst, Santa Fe, NM 87501 USA.
   [Sherrington, David] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Sherrington, D (reprint author), Univ Oxford, Rudolf Peierls Ctr Theoret Phys, 1 Keble Rd, Oxford OX1 3NP, England.
EM D.Sherrington1@physics.ox.ac.uk
NR 33
TC 17
Z9 17
U1 2
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD JUL 30
PY 2008
VL 20
IS 30
AR 304213
DI 10.1088/0953-8984/20/30/304213
PG 5
WC Physics, Condensed Matter
SC Physics
GA 324EL
UT WOS:000257500400014
ER

PT J
AU Somorjai, GA
   Rous, PJ
AF Somorjai, G. A.
   Rous, P. J.
TI John Pendry: his contributions to the development of low energy electron
   diffraction surface crystallography
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID MULTIPLE-SCATTERING THEORY; LEED CRYSTALLOGRAPHY; CARBON-MONOXIDE;
   SINGLE-CRYSTAL; DIFFUSE LEED; TENSOR LEED; PT(111); ADSORPTION;
   ETHYLIDYNE; BENZENE
AB In this paper we discuss the pivotal role played by Sir John Pendry in the development of low energy electron diffraction (LEED) during the past three decades: the earliest understanding of the physics of LEED to the development of sophisticated methods for the structural solution of complex surfaces.
C1 [Somorjai, G. A.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Somorjai, G. A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   [Rous, P. J.] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA.
RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
NR 46
TC 1
Z9 1
U1 1
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD JUL 30
PY 2008
VL 20
IS 30
AR 304210
DI 10.1088/0953-8984/20/30/304210
PG 6
WC Physics, Condensed Matter
SC Physics
GA 324EL
UT WOS:000257500400011
ER

PT J
AU Soukoulis, CM
   Zhou, JF
   Koschny, T
   Kafesaki, M
   Economou, EN
AF Soukoulis, Costas M.
   Zhou, Jiangfeng
   Koschny, Thomas
   Kafesaki, Maria
   Economou, Eleftherios N.
TI The science of negative index materials
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID SPLIT-RING RESONATORS; LEFT-HANDED MATERIALS; MAGNETIC RESPONSE;
   COMPOSITE METAMATERIALS; OPTICAL METAMATERIALS; REFRACTIVE-INDEX;
   FREQUENCIES; TRANSMISSION; WAVELENGTHS; TERAHERTZ
AB Metamaterials are designed to have structures that make available properties not found in Nature. Their unique properties (such as negative index of refraction, n) can be extended from GHz all the way to optical frequencies. We review the scaling properties of metamaterials that have been fabricated and give negative n and negative permeability, mu. It is found that most of the experimentally realized metamaterials have lambda/a between 2 (THz and optical region) and 12 (GHz region), where. is the operation wavelength and a is the size of the unit cell. The transmission losses for the experimental structures and the ratio lambda/a for the simulated structures are presented. Finally, a comparison of the different metamaterial designs (fishnet, cut and/or continuous wires, and split-ring resonators and wires) is given.
C1 [Soukoulis, Costas M.; Zhou, Jiangfeng; Koschny, Thomas] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
   [Soukoulis, Costas M.; Zhou, Jiangfeng; Koschny, Thomas] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
   [Soukoulis, Costas M.; Kafesaki, Maria] Univ Crete, Dept Mat Sci & Technol, Iraklion, Crete, Greece.
   [Soukoulis, Costas M.; Kafesaki, Maria; Economou, Eleftherios N.] Univ Crete, Inst Elect Struct & Laser, FORTH, Iraklion, Crete, Greece.
   [Economou, Eleftherios N.] Univ Crete, Dept Phys, Iraklion, Crete, Greece.
RP Soukoulis, CM (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
RI Zhou, Jiangfeng/D-4292-2009; Economou, Eleftherios /E-6374-2010;
   Kafesaki, Maria/E-6843-2012; Soukoulis, Costas/A-5295-2008
OI Zhou, Jiangfeng/0000-0002-6958-3342; Kafesaki,
   Maria/0000-0002-9524-2576; 
NR 50
TC 35
Z9 36
U1 1
U2 23
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD JUL 30
PY 2008
VL 20
IS 30
AR 304217
DI 10.1088/0953-8984/20/30/304217
PG 7
WC Physics, Condensed Matter
SC Physics
GA 324EL
UT WOS:000257500400018
ER

PT J
AU Luo, JH
   Xu, HW
   Liu, Y
   Zhao, YS
   Daemen, LL
   Brown, C
   Timofeeva, TV
   Ma, SQ
   Zhou, HC
AF Luo, Junhua
   Xu, Hongwu
   Liu, Yun
   Zhao, Yusheng
   Daemen, Luke L.
   Brown, Craig
   Timofeeva, Tatiana V.
   Ma, Shengqian
   Zhou, Hong-Cai
TI Hydrogen adsorption in a highly stable porous rare-earth metal-organic
   framework: Sorption properties and neutron diffraction studies
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID CARBIDE-DERIVED CARBONS; PORE-SIZE; STORAGE
AB A highly stable porous lanthanide metal-organic framework, Y(BTC)(H(2)O)4 center dot 3H(2)O (BTC =1,3,5-benzenetricarboxylate), with pore size of 5.8 angstrom has been constructed and investigated for hydrogen storage. Gas sorption measurements show that this porous MOF exhibits highly selective sorption behaviors of hydrogen over nitrogen gas molecules and can take up hydrogen of about 2.1 wt% at 77 K and 10 bar. Difference Fourier analysis of neutron powder diffraction data revealed four distinct D(2) sites that are progressively filled within the nanoporous framework. Interestingly, the strongest adsorption sites identified are associated with the aromatic organic linkers rather than the open metal sites, as occurred in previously reported MOFs. Our results provide for the first time direct structural evidence demonstrating that optimal pore size (around 6 angstrom, twice the kinetic diameter of hydrogen) strengthens the interactions between H(2) molecules and pore walls and increases the heat of adsorption, which thus allows for enhancing hydrogen adsorption from the interaction between hydrogen molecules with the pore walls rather than with the normally stronger adsorption sites (the open metal sites) within the framework. At high concentration H(2) loadings (5.5 H(2) molecules (3.7 wt%) per Y(BTC) formula), H(2) molecules form highly symmetric novel nanoclusters with relatively short H(2)-H(2) distances compared to solid H(2). These observations are important and hold the key to optimizing this new class of rare metal-organic framework (RMOF) materials for practical hydrogen storage applications.
C1 [Luo, Junhua; Xu, Hongwu; Zhao, Yusheng; Daemen, Luke L.] Los Alamos Natl Lab, LANSCE 12, Los Alamos, NM 87545 USA.
   [Xu, Hongwu] Los Alamos Natl Lab, EES 6, Los Alamos, NM 87545 USA.
   [Liu, Yun; Brown, Craig] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
   [Liu, Yun] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA.
   [Timofeeva, Tatiana V.] New Mexico Highlands Univ, Dept Nat Sci, Las Vegas, NM 87701 USA.
   [Ma, Shengqian; Zhou, Hong-Cai] Miami Univ, Dept Chem & Biochem, Oxford, OH 45056 USA.
RP Luo, JH (reprint author), Los Alamos Natl Lab, LANSCE 12, POB 1663, Los Alamos, NM 87545 USA.
EM jhluo@lanl.gov; yzhao@lanl.gov
RI Liu, Yun/A-2478-2010; Liu, Yun/F-6516-2012; Lujan Center,
   LANL/G-4896-2012; Zhou, Hong-Cai/A-3009-2011; Ma, Shengqian/B-4022-2012;
   Luo, Junhua/G-8928-2011; Brown, Craig/B-5430-2009
OI Xu, Hongwu/0000-0002-0793-6923; Liu, Yun/0000-0002-0944-3153; Liu,
   Yun/0000-0002-0944-3153; Zhou, Hong-Cai/0000-0002-9029-3788; Ma,
   Shengqian/0000-0002-1897-7069; Luo, Junhua/0000-0002-3179-7652; Brown,
   Craig/0000-0002-9637-9355
NR 21
TC 216
Z9 219
U1 17
U2 160
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD JUL 30
PY 2008
VL 130
IS 30
BP 9626
EP +
DI 10.1021/ja801411f
PG 4
WC Chemistry, Multidisciplinary
SC Chemistry
GA 329WY
UT WOS:000257902500003
PM 18611006
ER

PT J
AU Lee, JS
   Shevchenko, EV
   Talapin, DV
AF Lee, Jong-Soo
   Shevchenko, Elena V.
   Talapin, Dmitri V.
TI Au-PbS core-shell nanocrystals: Plasmonic absorption enhancement and
   electrical doping via intra-particle charge transfer
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID QUANTUM DOTS; SIZE; PHOTODETECTORS; SUPERLATTICES; CONDUCTIVITY; BINARY;
   FILMS
AB We present a comparative study of optical and electronic properties for PbS nanocrystals and Au-PbS core-shell nanostructures. In Au -PbS nanostructures, we observed two nontrivial synergistic effects: (i) extinction enhancement due to coupling of surface plasmon resonance in the Au core to the excitonic states in the Table of Contents Wournal Home PagelSearch the Journals semiconducting PbS shell, and (ii) strong p-type electronic doping of Au-PbS nanocrystal solids that we explained by the intraparticle charge transfer between the PbS shell and the Au core.
C1 [Lee, Jong-Soo; Talapin, Dmitri V.] Univ Chicago, Dept Chem, Chicago, IL 60637 USA.
   [Lee, Jong-Soo; Shevchenko, Elena V.; Talapin, Dmitri V.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [Shevchenko, Elena V.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Talapin, DV (reprint author), Univ Chicago, Dept Chem, Chicago, IL 60637 USA.
EM dvtalapin@uchicago.edu
RI Lee, Jong-Soo /F-7461-2010
OI Lee, Jong-Soo /0000-0002-3045-2206
NR 25
TC 219
Z9 222
U1 18
U2 133
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD JUL 30
PY 2008
VL 130
IS 30
BP 9673
EP +
DI 10.1021/ja802890f
PG 4
WC Chemistry, Multidisciplinary
SC Chemistry
GA 329WY
UT WOS:000257902500026
PM 18597463
ER

PT J
AU Mehta, AK
   Lu, K
   Childers, WS
   Liang, Y
   Dublin, SN
   Dong, JJ
   Snyder, JP
   Pingali, SV
   Thiyagarajan, P
   Lynn, DG
AF Mehta, Anil K.
   Lu, Kun
   Childers, W. Seth
   Liang, Yan
   Dublin, Steven N.
   Dong, Jijun
   Snyder, James P.
   Pingali, Sai Venkatesh
   Thiyagarajan, Pappannan
   Lynn, David G.
TI Facial symmetry in protein self-assembly
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID ECHO DOUBLE-RESONANCE; AMYLOID FIBRIL FORMATION; BETA-SHEET STRUCTURE;
   SOLID-STATE NMR; INTENSITY DISTRIBUTION; AB-INITIO; PRION; PEPTIDE;
   FRAGMENT; CONFORMATION
AB Amyloids are self-assembled protein architectures implicated in dozens of misfolding diseases. These assemblies appear to emerge through a "selection" of specific conformational "strains" which nucleate and propagate within cells to cause disease. The short A beta(16-22) peptide, which includes the central core of the Alzheimer's disease A beta peptide, generates an amyloid fiber which is morphologically indistinguishable from the full-length peptide fiber, but it can also form other morphologies under distinct conditions. Here we combine spectroscopic and microscopy analyses that reveal the subtle atomic-level differences that dictate assembly of two conformationally pure A beta(16-22) assemblies, amyloid fibers and nanotubes, and define the minimal repeating unit for each assembly.
C1 [Mehta, Anil K.; Lu, Kun; Childers, W. Seth; Liang, Yan; Dublin, Steven N.; Dong, Jijun; Snyder, James P.; Lynn, David G.] Emory Univ, Ctr Anal Supramol Self Assemblies, Dept Chem, Atlanta, GA 30322 USA.
   [Mehta, Anil K.; Lu, Kun; Childers, W. Seth; Liang, Yan; Dublin, Steven N.; Dong, Jijun; Snyder, James P.; Lynn, David G.] Emory Univ, Dept Biol, Atlanta, GA 30322 USA.
   [Pingali, Sai Venkatesh; Thiyagarajan, Pappannan] Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA.
RP Lu, K (reprint author), Emory Univ, Ctr Anal Supramol Self Assemblies, Dept Chem, Atlanta, GA 30322 USA.
EM david.lynn@emory.edu
OI Mehta, Anil/0000-0002-9867-151X; Pingali, Sai
   Venkatesh/0000-0001-7961-4176
NR 59
TC 101
Z9 102
U1 3
U2 35
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD JUL 30
PY 2008
VL 130
IS 30
BP 9829
EP 9835
DI 10.1021/ja801511n
PG 7
WC Chemistry, Multidisciplinary
SC Chemistry
GA 329WY
UT WOS:000257902500044
PM 18593163
ER

PT J
AU Olsen, BD
   Segalman, RA
AF Olsen, Bradley D.
   Segalman, Rachel A.
TI Self-assembly of rod-coil block copolymers
SO MATERIALS SCIENCE & ENGINEERING R-REPORTS
LA English
DT Review
DE block copolymers; rod-coil; semiflexible; seif-assembly; thin film;
   helix; organic electronics; phase behavior
ID POLYPEPTIDE DIBLOCK COPOLYMERS; ACID-N-CARBOXYANHYDRIDES; TRANSFER
   RADICAL POLYMERIZATION; LIQUID-CRYSTALLINE ASSEMBLIES;
   STIMULI-RESPONSIVE VESICLES; AIR-WATER-INTERFACE; TRIBLOCK COPOLYMERS;
   THIN-FILMS; SUPRAMOLECULAR MATERIALS; POLY(ETHYLENE OXIDE)
AB Rod-coil block copolymers are an increasingly important class of molecules for the self-assembly of functional polymer systems, many of which have rodlike chain conformations due to rigid secondary structures, extended pi-conjugation, or aromatic groups along the polymer backbone. Examples of these polymers are helical proteins, polyisocyanates, main-chain semiconducting polymers, and aromatic polyesters, polyamides, or polyimines. Many hindered or liquid crystalline systems self-assembled from block copolymers, including dendronized polymers and mesogen-jacketed liquid crystalline polymers, also form rod-coil block copolymers. In these cases, steric crowding of the bulky or mesogenic side chains causes the polymer backbone to become quasi-linear. The incorporation of rigid rod polymers into the block copolymers results in extremely rich self-assembly behavior that differs markedly from that of traditional block copolymers due to the interplay between microphase separation of the rod and coil components and liquid crystalline alignment. The combination of these effects results in novel structures both in solution and melts. This review discusses in detail the self-assembly and thermodynamics of rod-coil diblock and triblock copolymers. After summarizing the applications of these materials, their aggregation and gelation in solution is discussed. Our knowledge of their bulk phase behavior is thoroughly reviewed both from the experimental and theoretical perspectives, and the self-assembly of these materials in thin film geometries that are critical to many applications in organic electronics and functional surface patterning is treated. Finally, the outlook for the future of these systems is summarized along with current knowledge gaps and exciting areas for the advancement of the field. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Olsen, Bradley D.; Segalman, Rachel A.] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
   [Olsen, Bradley D.; Segalman, Rachel A.] Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA USA.
RP Segalman, RA (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
EM segalman@berkeley.edu
OI Olsen, Bradley/0000-0002-7272-7140
FU NSF-CAREER Award; Fannie and John Hertz Foundation
FX We gratefully acknowledge financial support through an NSF-CAREER Award.
   BDO would like to acknowledge fellowship support for graduate study from
   the Fannie and John Hertz Foundation.
NR 267
TC 222
Z9 227
U1 27
U2 308
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0927-796X
J9 MAT SCI ENG R
JI Mater. Sci. Eng. R-Rep.
PD JUL 30
PY 2008
VL 62
IS 2
BP 37
EP 66
DI 10.1016/j.mser.2008.04.001
PG 30
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 339BM
UT WOS:000258553100001
ER

PT J
AU Butko, VY
   Wang, HY
   Reagor, D
AF Butko, Vladimir Y.
   Wang, Haiyan
   Reagor, David
TI A magnetic field sensitive interfacial metallic state in a crystalline
   insulator
SO NANOTECHNOLOGY
LA English
DT Article
ID SEMICONDUCTING STRONTIUM-TITANATE; SRTIO3; OXIDE; MOBILITY;
   MAGNETORESISTANCE; POLARIZATION; DEFECTS; SURFACE
AB We report strongly magnetic field dependent transport in crystalline strontium titanate at the interface with an ion beam treated nanolayer. Microscopy shows that this interface is atomically sharp. The results obtained suggest a chemical potential driven transfer of high mobility electrons through the interface into the crystal. This phenomenon provides a strategy for device fabrication without disorder in the conduction channel. We show, for nonmagnetic metals, magnetoresistance and plateau-like Hall magneto-dependence, possibly caused by electron cyclotron effects in a strongly correlated quasi-two-dimensional Fermi gas.
C1 [Butko, Vladimir Y.] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
   [Wang, Haiyan] Texas A&M Univ, Dept Elect & Comp Engn, College Stn, TX 77843 USA.
   [Reagor, David] Los Alamos Natl Lab, Superconductiv Technol Ctr, Los Alamos, NM 87545 USA.
RP Butko, VY (reprint author), Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
RI Wang, Haiyan/P-3550-2014
OI Wang, Haiyan/0000-0002-7397-1209
NR 30
TC 5
Z9 5
U1 1
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-4484
J9 NANOTECHNOLOGY
JI Nanotechnology
PD JUL 30
PY 2008
VL 19
IS 30
AR 305401
DI 10.1088/0957-4484/19/30/305401
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
   Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA 314VX
UT WOS:000256838400008
PM 21828760
ER

PT J
AU Ham, TS
   Lee, SK
   Keasling, JD
   Arkin, AP
AF Ham, Timothy S.
   Lee, Sung K.
   Keasling, Jay D.
   Arkin, Adam P.
TI Design and Construction of a Double Inversion Recombination Switch for
   Heritable Sequential Genetic Memory
SO PLOS ONE
LA English
DT Article
AB Background: Inversion recombination elements present unique opportunities for computing and information encoding in biological systems. They provide distinct binary states that are encoded into the DNA sequence itself, allowing us to overcome limitations posed by other biological memory or logic gate systems. Further, it is in theory possible to create complex sequential logics by careful positioning of recombinase recognition sites in the sequence.
   Methodology/Principal Findings: In this work, we describe the design and synthesis of an inversion switch using the fim and hin inversion recombination systems to create a heritable sequential memory switch. We have integrated the two inversion systems in an overlapping manner, creating a switch that can have multiple states. The switch is capable of transitioning from state to state in a manner analogous to a finite state machine, while encoding the state information into DNA. This switch does not require protein expression to maintain its state, and "remembers'' its state even upon cell death. We were able to demonstrate transition into three out of the five possible states showing the feasibility of such a switch.
   Conclusions/Significance: We demonstrate that a heritable memory system that encodes its state into DNA is possible, and that inversion recombination system could be a starting point for more complex memory circuits. Although the circuit did not fully behave as expected, we showed that a multi-state, temporal memory is achievable.
C1 [Ham, Timothy S.; Keasling, Jay D.; Arkin, Adam P.] Univ Calif Berkeley, Dept Bioengn, Berkeley, CA 94720 USA.
   [Lee, Sung K.; Keasling, Jay D.; Arkin, Adam P.] Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA USA.
   [Keasling, Jay D.] Univ Calif, Dept Chem Engn, Berkeley, CA USA.
RP Ham, TS (reprint author), Univ Calif Berkeley, Dept Bioengn, Berkeley, CA 94720 USA.
EM aparkin@lbl.gov
RI Lee, Sung/E-6525-2010; Keasling, Jay/J-9162-2012; Arkin,
   Adam/A-6751-2008
OI Keasling, Jay/0000-0003-4170-6088; Arkin, Adam/0000-0002-4999-2931
FU National Science Foundation; NIH [5R01-GM63525-03]; Howard Hughes
   Medical Institute
FX This research was supported in part by the National Science Foundation
   supported Synthetic Biology Engineering Research Center. APA would like
   to acknowledge NIH grant # 5R01-GM63525-03 for allowing the initiation
   of this project and the Howard Hughes Medical Institute for partial
   support during its progress. We authors declare that no competing
   interests exist.
NR 35
TC 69
Z9 69
U1 3
U2 21
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD JUL 30
PY 2008
VL 3
IS 7
AR e2815
DI 10.1371/journal.pone.0002815
PG 9
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 420QM
UT WOS:000264304300034
PM 18665232
ER

PT J
AU Kirn, KH
   Norton, DP
   Christen, DK
   Budai, JD
AF Kirn, K. H.
   Norton, D. P.
   Christen, D. K.
   Budai, J. D.
TI Formation of oxidation-resistant Cu-Mg coatings on (001) Cu for oxide
   superconducting tapes
SO SURFACE & COATINGS TECHNOLOGY
LA English
DT Article
DE oxidation resistance; oxide superconductor; copper; copper alloy;
   sputtering; multilayer
ID COATED CONDUCTOR APPLICATIONS; BIAXIALLY TEXTURED NI; CURRENT-DENSITY;
   COPPER-FILMS; YBA2CU3O7-DELTA FILMS; EPITAXIAL DEPOSITION;
   ION-IMPLANTATION; BUFFER LAYERS; YBCO FILMS; GROWTH
AB The formation of oxidation-resistant buffer layers on (001) oriented Cu for coated high-temperature superconducting tape applications was investigated. The approach employed Cu/Mg multilayer precursor films that were subsequently annealed to form either Mg-doped fcc Cu or intermetallic Cu-2 Mg. The precursor consisted of an Mg/Cu multilayer stack with 5 each of 25 nm thick Mg and 25 nm thick Cu layers which were grown at room temperature by sputter deposition. At annealing temperature of 400 degrees C, formation of the intermetallic Cu-2 Mg was observed. X-ray diffraction showed that the Cu-2 Mg (100) oriented grains were epitaxial with respect to the underlying Cu film, possessing a cube-on-cube orientation. In order to test oxidation resistance, CeO2 films were deposited at elevated temperature on Ni/(Cu,Mg)/Cu/MgO structures. In case of the CeO2 film on Ni/Cu/MgO, significant surface roughness due to the metal oxidation is observed. In contrast, no surface roughness is observed in the SEM images for the CeO2/Ni/(Cu,Mg)/Cu/MgO structure. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Kirn, K. H.; Norton, D. P.] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA.
   [Kirn, K. H.; Christen, D. K.; Budai, J. D.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Norton, DP (reprint author), Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA.
EM dnort@mse.ufl.edu
RI Budai, John/R-9276-2016
OI Budai, John/0000-0002-7444-1306
FU National Science Foundation [CHE-0304810]; Air Force Office of
   Scientific Research; U.S. Department of Energy
FX This work was partially supported by the National Science Foundation
   under grant CHE-0304810, and the Air Force Office of Scientific
   Research. The ORNL research was sponsored by the Division of Materials
   Sciences and Engineering, U.S. Department of Energy under contract with
   UT-Battelle, LLC. The authors thank the staff and facilities of the
   Major Analytical Instrumentation Center, Department of Materials Science
   and Engineering, University of Florida.
NR 36
TC 1
Z9 1
U1 1
U2 4
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0257-8972
J9 SURF COAT TECH
JI Surf. Coat. Technol.
PD JUL 30
PY 2008
VL 202
IS 21
BP 5136
EP 5139
DI 10.1016/j.surfcoat.2008.05.026
PG 4
WC Materials Science, Coatings & Films; Physics, Applied
SC Materials Science; Physics
GA 339PB
UT WOS:000258588400010
ER

PT J
AU Kindermann, G
   Obersteiner, M
   Sohngen, B
   Sathaye, J
   Andrasko, K
   Rametsteiner, E
   Schlamadinger, B
   Wunder, S
   Beach, R
AF Kindermann, Georg
   Obersteiner, Michael
   Sohngen, Brent
   Sathaye, Jayant
   Andrasko, Kenneth
   Rametsteiner, Ewald
   Schlamadinger, Bernhard
   Wunder, Sven
   Beach, Robert
TI Global cost estimates of reducing carbon emissions through avoided
   deforestation
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
   AMERICA
LA English
DT Article
DE carbon sequestration; climate change; reducing emissions from
   deforestation and ecosystem degradation (REDD); marginal cost; tropical
   forest
ID TROPICAL DEFORESTATION; ENVIRONMENTAL SERVICES; SEQUESTRATION;
   CONSERVATION; CLIMATE; PAYMENTS; LEAKAGE; AMAZON
AB Tropical deforestation is estimated to cause about one-quarter of anthropogenic carbon emissions, loss of biodiversity, and other environmental services. United Nations Framework Convention for Climate Change talks are now considering mechanisms for avoiding deforestation (AD), but the economic potential of AD has yet to be addressed. We use three economic models of global land use and management to analyze the potential contribution of AD activities to reduced greenhouse gas emissions. AD activities are found to be a competitive, low-cost abatement option. A program providing a 10% reduction in deforestation from 2005 to 2030 could provide 0.3-0.6 Gt (1 Gt = 1 x 10(5) g) CO(2)(.)yr(-1) in emission reductions and would require $0.4 billion to $1.7 billion(.)yr(-1) for 30 years. A 50% reduction in deforestation from 2005 to 2030 could provide 1.5-2.7 Gt CO(2)(.)yr(-1) in emission reductions and would require $17.2 billion to $28.0 billion(.)yr(-1). Finally, some caveats to the analysis that could increase costs of AD programs are described.
C1 [Sohngen, Brent] Ohio State Univ, Dept Agr Environm & Dev Econ, Columbus, OH 43210 USA.
   [Kindermann, Georg; Obersteiner, Michael; Rametsteiner, Ewald] Int Inst Appl Syst Anal, A-2361 Laxenburg, Austria.
   [Sathaye, Jayant] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [Andrasko, Kenneth] US EPA, Washington, DC 20460 USA.
   [Schlamadinger, Bernhard] TerraCarbon, A-8043 Graz, Austria.
   [Wunder, Sven] Ctr Int Forestry Res, BR-66095100 Belem, Para, Brazil.
   [Beach, Robert] RTI Int, Res Triangle Pk, NC 27709 USA.
RP Sohngen, B (reprint author), Ohio State Univ, Dept Agr Environm & Dev Econ, Columbus, OH 43210 USA.
EM sohngen.1@osu.edu
OI Wunder, Sven/0000-0002-9422-0260
NR 37
TC 191
Z9 196
U1 8
U2 103
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD JUL 29
PY 2008
VL 105
IS 30
BP 10302
EP 10307
DI 10.1073/pnas.0710616105
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 334GZ
UT WOS:000258211600008
PM 18650377
ER

PT J
AU Chen, ZQ
   Speck, C
   Wendel, P
   Tang, CY
   Stillman, B
   Lill, HL
AF Chen, Zhiqiang
   Speck, Christian
   Wendel, Patricia
   Tang, Chunyan
   Stillman, Bruce
   Lill, Huilin
TI The architecture of the DNA replication origin recognition complex in
   Saccharomyces cerevisiae
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
   AMERICA
LA English
DT Article
DE electron microscopy; structure; ATPase
ID STRUCTURAL BASIS; ELECTRON-MICROSCOPY; CONFORMATIONAL-CHANGES;
   NUCLEOTIDE-BINDING; ATPASE ACTIVITY; PROTEIN; ORC; CDC6; VISUALIZATION;
   LOCALIZATION
AB The origin recognition complex (ORC) is conserved in all eukaryotes. The six proteins of the Saccharomyces cerevisiae ORC that form a stable complex bind to origins of DNA replication and recruit prereplicative complex (pre-RC) proteins, one of which is Cdc6. To further understand the function of ORC we recently determined by single-particle reconstruction of electron micrographs a low-resolution, 3D structure of S. cerevisiae ORC and the ORC-Cdc6 complex. In this article, the spatial arrangement of the ORC subunits within the ORC structure is described. in one approach, a maltose binding protein (MBP) was systematically fused to the N or the C termini of the five largest ORC subunits, one subunit at a time, generating 10 MBP-fused ORCs, and the MBP density was localized in the averaged, 2D EM images of the MBP-fused ORC particles. Determining the Orc1-5 structure and comparing it with the native ORC structure localized the Orc6 subunit near Orc2 and Orc3. Finally, subunit-subunit interactions were determined by immunoprecipitation of ORC subunits synthesized in vitro. Based on the derived ORC architecture and existing structures of archaeal Orc1-DNA structures, we propose a model for ORC and suggest how ORC interacts with origin DNA and Cdc6. The studies provide a basis for understanding the overall structure of the pre-RC.
C1 [Speck, Christian; Wendel, Patricia; Stillman, Bruce] Cold Spring Harbor Lab, Holtsville, NY 11742 USA.
   [Chen, Zhiqiang; Tang, Chunyan; Lill, Huilin] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
   [Lill, Huilin] SUNY Stony Brook, Dept Biochem & Cell Biol, Stony Brook, NY 11794 USA.
RP Stillman, B (reprint author), Cold Spring Harbor Lab, 1 Brungtown Rd, Holtsville, NY 11742 USA.
EM stillman@cshi.edu; hli@bnl.gov
RI Tang, Chunyan/E-8352-2010; Speck, Christian/G-2882-2011; 
OI Speck, Christian/0000-0001-6646-1692; Stillman,
   Bruce/0000-0002-9453-4091
FU Medical Research Council [MC_U120085811]; NCI NIH HHS [P01 CA013106, P01
   CA013106-310025, P01 CA013106-38S10025]; NIGMS NIH HHS [GM45436,
   GM74985, R01 GM045436, R01 GM045436-20, R01 GM074985]
NR 43
TC 45
Z9 46
U1 2
U2 3
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD JUL 29
PY 2008
VL 105
IS 30
BP 10326
EP 10331
DI 10.1073/pnas.0803829105
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 334GZ
UT WOS:000258211600012
PM 18647841
ER

PT J
AU Santra, S
   Korber, BT
   Muldoon, M
   Barouch, DH
   Nabel, GJ
   Gao, F
   Hahn, BH
   Haynes, BF
   Letvin, NL
AF Santra, Sampa
   Korber, Bette T.
   Muldoon, Mark
   Barouch, Dan H.
   Nabel, Gary J.
   Gao, Feng
   Hahn, Beatrice H.
   Haynes, Barton F.
   Letvin, Norman L.
TI A centralized gene-based HIV-1 vaccine elicits broad cross-clade
   cellular immune responses in rhesus monkeys
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
   AMERICA
LA English
DT Article
DE consensus gene; cytotoxic T lymphocyte
ID CONSENSUS ENVELOPE GLYCOPROTEIN; SUBTYPE-B ENVELOPE; NEUTRALIZING
   ANTIBODIES; IMMUNOGENICITY; ANTIGENICITY; SELECTION; PROTEIN; GP120;
   AIDS
AB one of the major challenges that must be met in developing an HIV-1 vaccine is devising a strategy to generate cellular immunity with sufficient breadth to deal with the extraordinary genetic diversity of the virus. Amino acids in the envelopes of viruses from the same clade can differ by >15%, and those from different clades can differ by >30%. It has been proposed that creating immunogens using centralized HIV-1 gene sequences might provide a practical solution to this problem. Such centralized genes can be generated by employing a number of different strategies: consensus, ancestral, or center of tree sequences. These computer-generated sequences are a shorter genetic distance from any two contemporary virus sequences than those contemporary sequences are from each other. The present study was initiated to evaluate the breadth of cellular immunity generated through immunization of rhesus monkeys with vaccine constructs expressing either an HIV-1 global consensus envelope sequence (CON-S) or a single patient isolate clade B envelope sequence (clade B). We show that vaccine immunogens expressing the single centralized gene COWS generated cellular immune responses with significantly increased breadth compared with immunogens expressing a wild-type virus gene. In fact, COWS immunogens elicited cellular immune responses to 3- to 4-fold more discrete epitopes of the envelope proteins from clades A, C, and G than did clade B immunogens. These findings suggest that immunization with centralized genes is a promising vaccine strategy for developing a global vaccine for HIV-1 as well as vaccines for other genetically diverse viruses.
C1 [Letvin, Norman L.] Harvard Univ, Sch Med, Div Viral Pathogenesis, Beth Israel Deaconess Med Ctr,Dept Med, Boston, MA 02215 USA.
   [Korber, Bette T.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Korber, Bette T.] Santa Fe Inst, Santa Fe, NM 87501 USA.
   [Muldoon, Mark] Univ Manchester, Sch Math, Manchester M60 1QD, Lancs, England.
   [Nabel, Gary J.] NIAID, Vaccine Res Ctr, Natl Inst Hlth, Bethesda, MD 20892 USA.
   [Hahn, Beatrice H.] Univ Alabama, Birmingham, AL 35294 USA.
   [Gao, Feng; Haynes, Barton F.] Duke Univ, Med Ctr, Durham, NC 27710 USA.
RP Letvin, NL (reprint author), Harvard Univ, Sch Med, Div Viral Pathogenesis, Beth Israel Deaconess Med Ctr,Dept Med, RE113,POB 15732, Boston, MA 02215 USA.
EM nietvin@bidmc.harvard.edu
RI Muldoon, Mark/C-7505-2009; 
OI Muldoon, Mark/0000-0002-5004-7195; Korber, Bette/0000-0002-2026-5757
FU NIAID NIH HHS [N01AI30034, N01-AI30033, N01AI30033, N01-AI30034, P01
   AI061734, N01AI60005, P01-AI61734]
NR 24
TC 51
Z9 52
U1 0
U2 2
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD JUL 29
PY 2008
VL 105
IS 30
BP 10489
EP 10494
DI 10.1073/pnas.0803352105
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 334GZ
UT WOS:000258211600040
PM 18650391
ER

PT J
AU Nuno, M
   Reichert, TA
   Chowell, G
   Gumel, AB
AF Nuno, M.
   Reichert, T. A.
   Chowell, G.
   Gumel, A. B.
TI Protecting residential care facilities from pandemic influenza
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
   AMERICA
LA English
DT Article
DE nonpharmaceutical interventions; SEIR stochastic model; self-isolation
   periods; social distancing; visitor and staff restrictions
ID MITIGATION STRATEGIES; UNITED-STATES; US CITIES; INTERVENTIONS
AB it is widely believed that protecting health care facilities against outbreaks of pandemic influenza requires pharmaceutical resources such as antivirals and vaccines. However, early in a pandemic, vaccines will not likely be available and antivirals will probably be of limited supply. The containment of pandemic influenza within acute-care hospitals anywhere is problematic because of open connections with communities. However, other health care institutions, especially those providing care for the disabled, can potentially control community access. We modeled a residential care facility by using a stochastic compartmental model to address the question of whether conditions exist under which nonpharmaceutical interventions (NPIs) alone might prevent the introduction of a pandemic virus. The model projected that with currently recommended staff-visitor interactions and social distancing practices, virus introductions are inevitable in all pandemics, accompanied by rapid internal propagation. The model identified staff reentry as the critical pathway of contagion, and provided estimates of the reduction in risk required to minimize the probability of a virus introduction. By using information on latency for historical and candidate pandemic viruses, we developed NPIs that simulated notions of protective isolation for staff away from the facility that reduced the probability of bringing the pandemic infection back to the facility to levels providing protection over a large range of projected pandemic severities. the proposed form of protective isolation was evaluated for social plausibility by collaborators who operate residential facilities. It appears unavoidable that NPI combinations effective against pandemics more severe than mild imply social disruption that increases with severity.
C1 [Nuno, M.] Univ Calif Los Angeles, Sch Publ Hlth, Dept Biostat, Los Angeles, CA 90095 USA.
   [Nuno, M.] Harvard Univ, Sch Publ Hlth, Dept Biostat, Boston, MA 02115 USA.
   [Reichert, T. A.] Entropy Res Inst, Lincoln, MA 01773 USA.
   [Chowell, G.] Arizona State Univ, Sch Human Evolut & Social Change, Tempe, AZ 85282 USA.
   [Chowell, G.] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
   [Chowell, G.] Los Alamos Natl Lab, Math Modelling & Anal Grp MS B284, Los Alamos, NM 87545 USA.
   [Gumel, A. B.] Univ Manitoba, Dept Math, Winnipeg, MB R3T 2N2, Canada.
RP Nuno, M (reprint author), Univ Calif Los Angeles, Sch Publ Hlth, Dept Biostat, Los Angeles, CA 90095 USA.
EM miriamnuno@ucla.edu
RI Chowell, Gerardo/A-4397-2008; Chowell, Gerardo/F-5038-2012
OI Chowell, Gerardo/0000-0003-2194-2251
FU NIAID NIH HHS [T32 AI007358, T32AI07358, AI28697, P30 AI028697]; NIBIB
   NIH HHS [R01EB006195, R01 EB006195]
NR 18
TC 15
Z9 15
U1 0
U2 2
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD JUL 29
PY 2008
VL 105
IS 30
BP 10625
EP 10630
DI 10.1073/pnas.0712014105
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 334GZ
UT WOS:000258211600063
PM 18647829
ER

PT J
AU Hong, J
   Ye, XH
   Wang, YR
   Zhang, YHP
AF Hong, Jiong
   Ye, Xinhao
   Wang, Yiran
   Zhang, Y-H. Percival
TI Bioseparation of recombinant cellulose-bindning module-proteins by
   affinity adsorption on an ultra-high-capacity cellulosic adsorbent
SO ANALYTICA CHIMICA ACTA
LA English
DT Article
DE affinity adsorbent; bioseparation; cellulose-binding module; protein
   purification; regenerated amorphous cellulose
ID CLOSTRIDIUM-THERMOCELLUM; ENZYMATIC-HYDROLYSIS; ESCHERICHIA-COLI;
   CELLOBIOSE PHOSPHORYLASE; TRICHODERMA-REESEI; BINDING DOMAIN;
   PURIFICATION; FUSION; LIGNOCELLULOSE; STRATEGIES
AB Low-cost protein purification methods are in high demand for mass production of low-selling price enzymes that play an important role in the upcoming bioeconomy. A simple protein purification method was developed based on affinity adsorption of a cellulose-binding module-tagged protein on regenerated amorphous cellulose (RAC) followed by modest desorption. The biodegradable cellulosic adsorbent RAC had a very high protein-binding capacity of up to 365 mg of protein per gram of RAC. The specifically-bound CBM-protein on the external surface of RAC was eluted efficiently by ethyl glycol or glycerol. This protein separation method can be scaled up easily because it is based on simple solid/liquid unit operations. Five recombinant proteins (CBM-protein), regardless of intercellular or periplasmic form, were purified successfully for demonstration purpose. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Hong, Jiong; Ye, Xinhao; Wang, Yiran; Zhang, Y-H. Percival] Virginia Polytech Inst & State Univ, Dept Biol Syst Engn, Blacksburg, VA 24061 USA.
   [Hong, Jiong] Univ Sci & Technol China, Sch Life Sci, Hefei 230027, Anhui, Peoples R China.
   [Zhang, Y-H. Percival] Virginia Polytech Inst & State Univ, Inst Crit Technol & Appl Sci ICTAS, Blacksburg, VA 24061 USA.
   [Zhang, Y-H. Percival] DOE BioEnergy Sci Ctr BESC, Oak Ridge, TN 37831 USA.
RP Zhang, YHP (reprint author), Virginia Polytech Inst & State Univ, Dept Biol Syst Engn, 210-A Seitz Hall, Blacksburg, VA 24061 USA.
EM ypzhang@vt.edu
RI Wang, Yi-Ran/C-4643-2013; Ye, Xinhao/J-7591-2013; HONG,
   Jiong/N-1996-2013
OI Wang, Yi-Ran/0000-0002-4171-868X; HONG, Jiong/0000-0002-4592-7083
NR 41
TC 57
Z9 58
U1 1
U2 24
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0003-2670
EI 1873-4324
J9 ANAL CHIM ACTA
JI Anal. Chim. Acta
PD JUL 28
PY 2008
VL 621
IS 2
BP 193
EP 199
DI 10.1016/j.aca.2008.05.041
PG 7
WC Chemistry, Analytical
SC Chemistry
GA 330KZ
UT WOS:000257941300010
PM 18573384
ER

PT J
AU Hauet, T
   Gunther, CM
   Hovorka, O
   Berger, A
   Im, MY
   Fischer, P
   Eimuller, T
   Hellwig, O
AF Hauet, T.
   Guenther, C. M.
   Hovorka, O.
   Berger, A.
   Im, M. -Y.
   Fischer, P.
   Eimueller, T.
   Hellwig, O.
TI Field driven ferromagnetic phase nucleation and propagation in
   antiferromagnetically coupled multilayer films with perpendicular
   anisotropy
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID X-RAY MICROSCOPY
AB We investigate the reversal process in {[Co/Pt](X-1)Co/Ru} x 16/[Co/Pt](X) multilayer films by magnetometry and magnetic transmission x-ray microscopy. After demagnetization, a stable one-dimensional ferromagnetic (FM) stripe domain phase (tiger-tail phase) for a thick sample (X = 7) is imaged, while metastable sharp antiferromagnetic domain walls are observed in the remanent state for a thinner stack sample (X = 6). When applying an external magnetic field the sharp domain walls of the thinner sample gradually transform into the FM phase via separate nucleation of many isolated FM domains all along the domain boundary. We present energy calculations that reveal the underlying energetics driving the overall reversal mechanism. (C) 2008 American Institute of Physics.
C1 [Hauet, T.; Hellwig, O.] Hitachi Global Storage Technol, San Jose Res Ctr, San Jose, CA 95135 USA.
   [Guenther, C. M.] BESSY, D-12489 Berlin, Germany.
   [Hovorka, O.; Berger, A.] CIC nanoGUNE Consolider, E-20009 San Sebastian, Spain.
   [Im, M. -Y.; Fischer, P.] Lawrence Berkeley Natl Lab, Ctr Xray Opt, Berkeley, CA 94720 USA.
   [Eimueller, T.] Ruhr Univ Bochum, Jr Res Grp Magnet Microscopy, D-44780 Bochum, Germany.
RP Hauet, T (reprint author), Hitachi Global Storage Technol, San Jose Res Ctr, San Jose, CA 95135 USA.
EM thomas.hauet@hitachigst.com
RI Fischer, Peter/A-3020-2010; MSD, Nanomag/F-6438-2012; Berger,
   Andreas/D-3706-2015; nanoGUNE, CIC/A-2623-2015; 
OI Fischer, Peter/0000-0002-9824-9343; Berger, Andreas/0000-0001-5865-6609;
   Gunther, Christian Michael/0000-0002-3750-7556
NR 11
TC 8
Z9 8
U1 0
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 28
PY 2008
VL 93
IS 4
AR 042505
DI 10.1063/1.2961001
PG 3
WC Physics, Applied
SC Physics
GA 333VC
UT WOS:000258179800063
ER

PT J
AU Korstgens, V
   Hsu, CC
   Paneque, D
   Wiedersich, J
   Muller-Buschbaum, P
AF Koerstgens, V.
   Hsu, C. -C.
   Paneque, D.
   Wiedersich, J.
   Mueller-Buschbaum, P.
TI Improvement of quantum efficiency of photomultiplier tubes by humidity
   controlled coatings based on porous polymer structures
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ORGANIZED HONEYCOMB MORPHOLOGY; AIR CHERENKOV TELESCOPES;
   PHASE-SEPARATION; BREATH FIGURES; FILMS; SENSITIVITY; ENHANCE
AB Based on spin coating in humidity controlled environment an extremely simple deposition process is established which allows convenient and reproducible coating of photomultiplier tubes (PMTs) to achieve an improvement in photon sensitivity and thereby a higher quantum efficiency. The coatings consisting of a blend of polyacrylate based copolymer with p-terphenyl are obtained from dichloromethane solutions. On the curved PMTs structures due to crystallization of p-terphenyl superposed with pores in the copolymer matrix are present. On flat substrates coatings established under identical conditions exhibit the same porous structure. The origin of the obtained structures is discussed in context of breath figures. (C) 2008 American Institute of Physics.
C1 [Koerstgens, V.; Wiedersich, J.; Mueller-Buschbaum, P.] Tech Univ Munich, Phys Dept E13, D-85757 Garching, Germany.
   [Hsu, C. -C.; Paneque, D.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
   [Paneque, D.] Stanford Univ, Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
RP Korstgens, V (reprint author), Tech Univ Munich, Phys Dept E13, James Franck Str 1, D-85757 Garching, Germany.
EM muellerb@ph.tum.de
RI Wiedersich, Johannes/C-6575-2014; Korstgens, Volker/N-8841-2014;
   Muller-Buschbaum, Peter/C-3397-2017; 
OI Wiedersich, Johannes/0000-0001-6855-0533; Korstgens,
   Volker/0000-0001-7178-5130; Muller-Buschbaum, Peter/0000-0002-9566-6088;
   Hsu, Ching-Cheng/0000-0001-9406-2023
NR 18
TC 7
Z9 7
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 28
PY 2008
VL 93
IS 4
AR 041916
DI 10.1063/1.2967195
PG 3
WC Physics, Applied
SC Physics
GA 333VC
UT WOS:000258179800041
ER

PT J
AU Li, Q
   Wang, GT
AF Li, Qiming
   Wang, George T.
TI Improvement in aligned GaN nanowire growth using submonolayer Ni
   catalyst films
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID SURFACE MASS-TRANSPORT; PARAMETERS; SAPPHIRE; ARRAYS
AB We report a route to ultrahigh-density and highly aligned single-crystalline GaN nanowires on sapphire by employing ultrathin Ni catalyst films with submonolayer thickness. The nanowire density and the degree of alignment were found to be highly sensitive to changes in the Ni catalyst film thickness below 1 nm, a regime rarely explored in catalyzed nanowire growth before. For submonolayer Ni films on sapphire, high activation energy for Ni diffusion on sapphire surface is attributed to the formation of high-density and ultrasmall Ni islands with a narrow size distribution, which in turn leads to high-density and highly aligned GaN nanowires. (C) 2008 American Institute of Physics.
C1 [Li, Qiming; Wang, George T.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Li, Q (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM gtwang@sandia.gov
RI Wang, George/C-9401-2009
OI Wang, George/0000-0001-9007-0173
NR 16
TC 50
Z9 51
U1 1
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 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 28
PY 2008
VL 93
IS 4
AR 043119
DI 10.1063/1.2965798
PG 3
WC Physics, Applied
SC Physics
GA 333VC
UT WOS:000258179800100
ER

PT J
AU Seamons, JA
   Bielejec, E
   Carroll, MS
   Childs, KD
AF Seamons, J. A.
   Bielejec, E.
   Carroll, M. S.
   Childs, K. D.
TI Room temperature single ion detection with Geiger mode avalanche diode
   detectors
SO APPLIED PHYSICS LETTERS
LA English
DT Article
AB We report on the fabrication and performance of a novel single ion Geiger mode avalanche (SIGMA) diode detector that senses single ions with similar to 100% detection efficiency at room temperature for 250 keV protons. The SIGMA diode detector utilizes Geiger mode operation of avalanche photodiodes, which can be sensitive to single electron- hole (e-h) pairs induced by the ion stopping. The SIGMA diode detector takes advantage of a complementary metal oxide semiconductor foundry allowing for future integration with silicon nanostructures to build novel single atom modified devices. SIGMA diode detector offers potential improvement in current integrated ion detector approaches that have noise floors in the order of 103 e- h pairs. (c) 2008 American Institute of Physics.
C1 [Seamons, J. A.; Bielejec, E.; Carroll, M. S.; Childs, K. D.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Seamons, JA (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM jaseamo@sandia.gov
NR 9
TC 12
Z9 12
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 28
PY 2008
VL 93
IS 4
AR 043124
DI 10.1063/1.2967211
PG 3
WC Physics, Applied
SC Physics
GA 333VC
UT WOS:000258179800105
ER

PT J
AU Shao, L
   Di, ZF
   Lin, Y
   Jia, QX
   Wang, YQ
   Nastasi, M
   Thompson, PE
   Theodore, ND
   Chu, PK
AF Shao, Lin
   Di, Zengfeng
   Lin, Yuan
   Jia, Q. X.
   Wang, Y. Q.
   Nastasi, M.
   Thompson, Phillip E.
   Theodore, N. David
   Chu, Paul K.
TI The role of strain in hydrogenation induced cracking in
   Si/Si(1-x)Ge(x)/Si structures
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID SILICON
AB Hydrogenation induced cracking in molecular beam epitaxy grown Si/Si(1-x)Ge(x)/Si heterostructures is studied. The Si(1-x)Ge(x) layer buried between an similar to 200 nm thick Si capping layer and the Si substrate is similar to 5 nm thick. After plasma hydrogenation, long range H migration and H trapping at the Si(1-x)Ge(x) layer are observed. With increasing Ge concentrations, the amount of H trapping increases, cracking along the Si(1-x)Ge(x) layer is smoother, and fewer defects are formed in the Si capping layer. The study suggests maximizing the interfacial strain to achieve the smoothest cracking with minimized radiation damage for ultrathin silicon-on-insulator technology. (C) 2008 American Institute of Physics.
C1 [Shao, Lin] Texas A&M Univ, Dept Nucl Engn, College Stn, TX 77843 USA.
   [Di, Zengfeng; Jia, Q. X.; Wang, Y. Q.; Nastasi, M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Lin, Yuan] Univ Elect Sci & Technol China, Sch Microelectron & Solid State Elect, Chengdu 610054, Peoples R China.
   [Thompson, Phillip E.] USN, Res Lab, Washington, DC 20375 USA.
   [Theodore, N. David] Freescale Semicond Inc, Analog & Mixed Signal Technol, Tempe, AZ 85284 USA.
   [Chu, Paul K.] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China.
RP Shao, L (reprint author), Texas A&M Univ, Dept Nucl Engn, College Stn, TX 77843 USA.
EM lshao@mailaps.org
RI di, zengfeng/B-1684-2010; Jia, Q. X./C-5194-2008; Chu, Paul/B-5923-2013;
   lin, yuan/B-9955-2013
OI Chu, Paul/0000-0002-5581-4883; 
NR 11
TC 5
Z9 5
U1 0
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 28
PY 2008
VL 93
IS 4
AR 041909
DI 10.1063/1.2963489
PG 3
WC Physics, Applied
SC Physics
GA 333VC
UT WOS:000258179800034
ER

PT J
AU Thompson, JR
   Polat, O
   Christen, DK
   Kumar, D
   Martin, PM
   Sinclair, JW
AF Thompson, J. R.
   Polat, O.
   Christen, D. K.
   Kumar, D.
   Martin, P. M.
   Sinclair, J. W.
TI Wide-range characterization of current conduction in high-T(c) coated
   conductors
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID HIGH-TEMPERATURE SUPERCONDUCTORS; CURRENT-VOLTAGE CHARACTERISTICS;
   FIELD-SWEEP RATE; MAGNETIC-RELAXATION; RATE DEPENDENCE; CURRENT-DENSITY;
   ELECTRIC-FIELD; FLUX-CREEP; YBA2CU3O7-X; FILMS
AB The conduction of supercurrents in a short-segment state-of-the-art coated conductor prototype has been studied over similar to 8 decades of dissipation. A combination of conventional transport methods, magnetometry in a swept magnetic field, and "flux creep" measurements was used to obtain current density J versus electric field E characteristics over a span E similar to 10(-5)-10(-13) V/cm. The inductive measurements allow facile exploration of current conduction over a wide range of temperatures, magnetic fields, and dissipation levels where future applications are envisioned. (C) 2008 American Institute of Physics.
C1 [Thompson, J. R.; Polat, O.; Christen, D. K.; Kumar, D.; Martin, P. M.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   [Sinclair, J. W.] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA.
   [Kumar, D.] NC A&T Univ, Dept Mech Engn, Greensboro, NC 27411 USA.
RP Thompson, JR (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM jrt@utk.edu
RI Sinclair, John/E-7692-2011
NR 19
TC 12
Z9 12
U1 0
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 28
PY 2008
VL 93
IS 4
AR 042506
DI 10.1063/1.2964195
PG 3
WC Physics, Applied
SC Physics
GA 333VC
UT WOS:000258179800064
ER

PT J
AU Wu, MM
   Cheng, YZ
   Peng, J
   Xiao, XL
   Hu, ZB
   Kiyanagi, R
   Fieramosca, JS
   Short, S
   Jorgensen, J
AF Wu, M. M.
   Cheng, Y. Z.
   Peng, J.
   Xiao, X. L.
   Hu, Z. B.
   Kiyanagi, R.
   Fieramosca, J. S.
   Short, S.
   Jorgensen, J.
TI Studies on structural and thermal expansion properties of
   Ho(2-x)Ln(x)Mo(4)O(15) (Ln = Er, Sm and Ce) solid solutions
SO JOURNAL OF ALLOYS AND COMPOUNDS
LA English
DT Article
DE solid-state reaction; crystal structure; thermal expansion; X-ray
   diffraction
ID NEUTRON POWDER DIFFRACTION; CRYSTAL-STRUCTURE; ZRW2O8; DY; ND; BEHAVIOR;
   TM; HO
AB Three new series of Ho2-xErxMo4O15 (x = 0.0-2.0), Ho2-xSmxMo4O15 (x = 0.0-0.6) and Ho2-xCexMo4O15 (x = 0.0-0.25) solid solutions have been prepared successfully by solid-state reaction and studied by powder X-ray diffraction. All the XRD patterns of these molybdates can be indexed in monoclinic space group P2(1)/c. Lattice parameters a, b and c of Ho(2-x)Ln(x)Mo(4)O(15) decrease linearly with increasing erbium content and increase with increasing samarium or cerium content. Thermal expansion behaviors of Ho(2-x)Ln(x)Mo(4)O(15) have been investigated in the 25-500 degrees C temperature range with high-temperature X-ray diffraction. The temperature dependence of Mo(2)-O14 interaction looks like to be responsible for their thermal expansion behaviors. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Wu, M. M.; Cheng, Y. Z.; Peng, J.; Xiao, X. L.; Hu, Z. B.] Chinese Acad Sci, Grad Univ, Coll Chem & Chem Engn, Beijing 100049, Peoples R China.
   [Kiyanagi, R.; Fieramosca, J. S.; Short, S.; Jorgensen, J.] Argonne Natl Lab, IPNS MSD, Argonne, IL 60439 USA.
RP Hu, ZB (reprint author), Chinese Acad Sci, Grad Univ, Coll Chem & Chem Engn, Beijing 100049, Peoples R China.
EM huzq@gucas.ac.cn
NR 25
TC 3
Z9 3
U1 0
U2 4
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-8388
J9 J ALLOY COMPD
JI J. Alloy. Compd.
PD JUL 28
PY 2008
VL 460
IS 1-2
BP 103
EP 107
DI 10.1016/j.jallcom.2007.06.083
PG 5
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
   Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA 320DA
UT WOS:000257212700023
ER

PT J
AU Moyer, RO
   Antao, SM
   Toby, BH
   Morin, FG
   Gilson, DFR
AF Moyer, Ralph O., Jr.
   Antao, Sytle M.
   Toby, Brian H.
   Morin, Frederick G.
   Gilson, Denis F. R.
TI Neutron powder diffraction and solid-state deuterium NMR studies of
   Ca2RuD6 and the stability of transition metal hexahydride salts
SO JOURNAL OF ALLOYS AND COMPOUNDS
LA English
DT Article
DE ternary metal hydrides; neutron diffraction; deuterium NMR; stability
ID RUTHENIUM HYDRIDE; TERNARY; COMPLEXES; CA2IRD5; RHODIUM; CALCIUM;
   IRIDIUM
AB The crystal structure of Ca2RuD6 has been determined by neutron powder diffraction: space group Fm3m, K2PtCl6 Structure, as found for other hexahydride salts of group 8 metals with alkaline earth or lanthanide counter ions. No structural phase transition was observed between 340 K and 50 K. The deuterium nuclear quadrupole coupling constant, 54.7 kHz, leads to an ionic character of the Ru-D bond of 76%. The known trends in the behaviour of A(2)MH(6) salts are interpreted in terms of the ionization energies of the cation and the central metal atom. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Morin, Frederick G.; Gilson, Denis F. R.] McGill Univ, Dept Chem, Montreal, PQ H3A 2K6, Canada.
   [Moyer, Ralph O., Jr.] Trinity Coll, Dept Chem, Hartford, CT 06106 USA.
   [Antao, Sytle M.; Toby, Brian H.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Gilson, DFR (reprint author), McGill Univ, Dept Chem, 801 Sherbrooke St W, Montreal, PQ H3A 2K6, Canada.
EM denis.gilson@mcgill.ca
RI Toby, Brian/F-3176-2013
OI Toby, Brian/0000-0001-8793-8285
NR 19
TC 8
Z9 8
U1 0
U2 5
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-8388
J9 J ALLOY COMPD
JI J. Alloy. Compd.
PD JUL 28
PY 2008
VL 460
IS 1-2
BP 138
EP 141
DI 10.1016/j.jallcom.2007.05.078
PG 4
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
   Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA 320DA
UT WOS:000257212700029
ER

PT J
AU Stumphy, B
   Mudryk, Y
   Russell, A
   Herman, D
   Gschneidner, K
AF Stumphy, B.
   Mudryk, Y.
   Russell, A.
   Herman, D.
   Gschneidner, K., Jr.
TI Oxidation resistance of B2 rare earth-magnesium intermetallic compounds
SO JOURNAL OF ALLOYS AND COMPOUNDS
LA English
DT Article
DE intermetallics; rare earth alloys and compounds; crystal structure;
   kinetics; microstructure
ID SINGLE-CRYSTAL; YTTRIUM; METALS
AB The oxidation behaviors of YMg and CeMg were rneasured in flowing air using the thermal gravimetric analysis technique. Negligible oxidation is observed at room temperature in both compounds. At elevated temperatures, the rare earth metals oxidize preferentially, while the underlying materials transform into Mg-rich intermetallics before the Mg oxidizes to MgO. The oxidation resistance of YMg is several orders of magnitude greater than that of CeMg. The oxidation of YMg follows parabolic kinetics with an activation energy of 104 kJ/mol while that of CeMg obeys a linear law with an activation energy of 136 kJ/mol. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Stumphy, B.; Russell, A.; Herman, D.; Gschneidner, K., Jr.] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
   [Stumphy, B.; Mudryk, Y.; Russell, A.; Gschneidner, K., Jr.] US DOE, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA.
RP Gschneidner, K (reprint author), Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
EM cagey@ameslab.gov
OI Russell, Alan/0000-0001-5264-0104
NR 15
TC 11
Z9 12
U1 0
U2 4
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-8388
J9 J ALLOY COMPD
JI J. Alloy. Compd.
PD JUL 28
PY 2008
VL 460
IS 1-2
BP 363
EP 367
DI 10.1016/j.jallcom.2007.06.067
PG 5
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
   Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA 320DA
UT WOS:000257212700067
ER

PT J
AU Cang, H
   Montiel, D
   Xu, CS
   Yang, H
AF Cang, Hu
   Montiel, Daniel
   Xu, C. Shan
   Yang, Haw
TI Observation of spectral anisotropy of gold nanoparticles
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID SURFACE-PLASMON RESONANCE; METAL NANOPARTICLES; PARTICLE TRACKING;
   SINGLE; FLUORESCENCE; SPECTROSCOPY; MOLECULES; NANOSTRUCTURES;
   NANOCRYSTALS; MICROSCOPY
AB Metallic nanoparticles synthesized by solution-phase chemistry usually exhibit various polygonal morphologies. The shape is known to have a great impact on a nanoparticle's optical properties, for instance, the surface plasmon resonance frequency. It remains unclear, however, whether the scattering spectrum of nanoparticles is generally anisotropic in the far field as a result. This simple question turns out to be extremely challenging to address because of the particle-to-particle shape inhomogeneity in a bulk sample, and the high sensitivity of surface plasmon resonance to local environments. We report the observation of scattering angle-dependent spectra using a newly developed single-particle tracking spectroscopy (SPS). Furthermore, we show that SPS has provided a way to directly visualize the rotational random walk of individual gold nanoparticles in water for the first time. (C) 2008 American Institute of Physics.
C1 [Cang, Hu] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Cang, H (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM hawyang@berkeley.edu
OI Yang, Haw/0000-0003-0268-6352
NR 32
TC 13
Z9 13
U1 0
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUL 28
PY 2008
VL 129
IS 4
AR 044503
DI 10.1063/1.2958912
PG 5
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 333SB
UT WOS:000258171500034
PM 18681656
ER

PT J
AU Fister, TT
   Seidler, GT
   Shirley, EL
   Vila, FD
   Rehr, JJ
   Nagle, KP
   Linehan, JC
   Cross, JO
AF Fister, T. T.
   Seidler, G. T.
   Shirley, E. L.
   Vila, F. D.
   Rehr, J. J.
   Nagle, K. P.
   Linehan, J. C.
   Cross, J. O.
TI The local electronic structure of alpha-Li3N
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID RAY RAMAN-SCATTERING; TRANSITION-METAL NITRIDES; ABSORPTION
   FINE-STRUCTURE; NORM-CONSERVING PSEUDOPOTENTIALS; MOLECULAR-DYNAMICS
   SIMULATION; HYDROGEN STORAGE MATERIALS; SUPERIONIC CONDUCTOR LI3N;
   LITHIUM NITRIDE; ION BATTERIES; HIGH-PRESSURE
AB New theoretical and experimental investigations of the occupied and unoccupied local electronic densities of states (DOS) are reported for alpha-Li3N. Band-structure and density-functional theory calculations confirm the absence of covalent bonding character. However, real-space full-multiple-scattering (RSFMS) calculations of the occupied local DOS find less extreme nominal valences than have previously been proposed. Nonresonant inelastic x-ray scattering, RSFMS calculations, and calculations based on the Bethe-Salpeter equation are used to characterize the unoccupied electronic final states local to both the Li and N sites. There is a good agreement between experiment and theory. Throughout the Li 1s near-edge region, both experiment and theory find strong similarities in the s-and p-type components of the unoccupied local final DOS projected onto an orbital angular momentum basis (l-DOS). An unexpected, significant correspondence exists between the near-edge spectra for the Li 1s and N 1s initial states. We argue that both spectra are sampling essentially the same final DOS due to the combination of long core-hole lifetimes, long photoelectron lifetimes, and the fact that orbital angular momentum is the same for all relevant initial states. Such considerations may be generally applicable for low atomic number compounds. (C) 2008 American Institute of Physics.
C1 [Fister, T. T.; Seidler, G. T.; Vila, F. D.; Rehr, J. J.; Nagle, K. P.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
   [Fister, T. T.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
   [Shirley, E. L.] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
   [Linehan, J. C.] Pacific NW Natl Lab, Richland, WA 99352 USA.
   [Cross, J. O.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Fister, TT (reprint author), Univ Washington, Dept Phys, Seattle, WA 98195 USA.
EM seidler@phys.washington.edu
RI Seidler, Gerald/I-6974-2012
NR 87
TC 17
Z9 17
U1 2
U2 33
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
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUL 28
PY 2008
VL 129
IS 4
AR 044702
DI 10.1063/1.2949550
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 333SB
UT WOS:000258171500043
PM 18681665
ER

PT J
AU Singh, J
   Baessler, H
   Kugler, S
AF Singh, Jai
   Baessler, H.
   Kugler, S.
TI A direct approach to study radiative emission from triplet excitations
   in molecular semiconductors and conjugated polymers
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID ENERGY-GAP; SINGLET; MONOMERS; EXCITONS; YNES
AB Using the recently discovered time-dependent spin-orbit-photon interaction operator and first order perturbation theory, the rate of spontaneous emission from triplet excitations is derived within the two-level approximation for organic molecular solids and conjugated polymers. The calculated rates and corresponding radiative lifetimes agree very well with the known experimental results. Present results are compared with those obtained through the traditional approach of the second order perturbation theory in some molecular crystals and found to be in better agreement with experiments. (C) 2008 American Institute of Physics.
C1 [Singh, Jai] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   [Singh, Jai] Hahn Meitner Inst Berlin GmbH, D-12489 Berlin, Germany.
   [Kugler, S.] Budapest Univ Technol & Econ, Dept Theoret Phys, H-1521 Budapest, Hungary.
   [Baessler, H.] Univ Marburg, Dept Chem, D-35032 Marburg, Germany.
   [Singh, Jai] Charles Darwin Univ, Sch Engn & IT, Darwin, NT 0909, Australia.
RP Singh, J (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM jai.singh@cdu.edu.au
RI kugler, Sandor/A-3982-2009
NR 25
TC 15
Z9 15
U1 0
U2 3
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 JUL 28
PY 2008
VL 129
IS 4
AR 041103
DI 10.1063/1.2961010
PG 4
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 333SB
UT WOS:000258171500003
PM 18681625
ER

PT J
AU Vaknin, D
   Bu, W
   Travesset, A
AF Vaknin, David
   Bu, Wei
   Travesset, Alex
TI Extracting the pair distribution function of liquids and liquid-vapor
   surfaces by grazing incidence x-ray diffraction mode
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID SCATTERING EXPERIMENTS; POTENTIAL FUNCTIONS; WATER-STRUCTURE;
   SPECTROSCOPY; ORIENTATION; INTERFACES; SIMULATION; NEUTRON
AB We show that the structure factor S(q) of water can be obtained from x-ray synchrotron experiments at grazing angle of incidence (in reflection mode) by using a liquid surface diffractometer. The corrections used to obtain S(q) self-consistently are described. Applying these corrections to scans at different incident beam angles (above the critical angle) collapses the measured intensities into a single master curve, without fitting parameters, which within a scale factor yields S(q). Performing the measurements below the critical angle for total reflectivity yields the structure factor of the top most layers of the water/vapor interface. Our results indicate water restructuring at the vapor/water interface. We also introduce a new approach to extract g(r), the pair distribution function (PDF), by expressing the PDF as a linear sum of error functions whose parameters are refined by applying a nonlinear least square fit method. This approach enables a straightforward determination of the inherent uncertainties in the PDF. Implications of our results to previously measured and theoretical predictions of the PDF are also discussed. (C) 2008 American Institute of Physics.
C1 [Vaknin, David] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
   Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
RP Vaknin, D (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
EM vaknin@ameslab.gov
RI Vaknin, David/B-3302-2009; Bu, Wei/Q-1390-2016
OI Vaknin, David/0000-0002-0899-9248; Bu, Wei/0000-0002-9996-3733
NR 39
TC 6
Z9 6
U1 1
U2 10
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 JUL 28
PY 2008
VL 129
IS 4
AR 044504
DI 10.1063/1.2953572
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 333SB
UT WOS:000258171500035
PM 18681657
ER

PT J
AU Stolte, WC
   Guillemin, R
   Yu, SW
   Lindle, DW
AF Stolte, W. C.
   Guillemin, R.
   Yu, S-W
   Lindle, D. W.
TI Photofragmentation of HCl near the chlorine L(2,3) ionization threshold:
   new evidence of a strong ultrafast dissociation channel
SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
LA English
DT Article
ID CORE-EXCITED HCL; HIGH-RESOLUTION; AUGER DECAY; YIELD SPECTROSCOPY;
   ELECTRON-IMPACT; CROSS-SECTIONS; INNER-SHELL; K EDGE; EXCITATION; STATES
AB We report a study using partial-ion-yield spectroscopy around the Cl 2p ionization threshold of HCl. All cation channels have been measured, while no evidence for anion production was obtained. The absence of any detectable H(-) can be related to the electronegativity difference between the two atoms and the observed low probability of directly creating Cl(++) and Cl(+++). In the photon-energy region around the Cl 2p(3/2,1/2) -> 6 sigma* excitation process, production of H(+) is almost completely suppressed, which indicates a dominant ultrafast dissociation process leading to neutral H.
C1 [Stolte, W. C.; Lindle, D. W.] Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA.
   [Guillemin, R.] Univ Paris 06, UMR 7614, Lab Chim Phys Matiere & Rayonnement, F-75005 Paris, France.
   [Guillemin, R.] CNRS, UMR 7614, Lab Chim Phys Mat & Rayonnement, F-75005 Paris, France.
   [Yu, S-W] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Stolte, WC (reprint author), Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA.
NR 23
TC 22
Z9 22
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-4075
J9 J PHYS B-AT MOL OPT
JI J. Phys. B-At. Mol. Opt. Phys.
PD JUL 28
PY 2008
VL 41
IS 14
AR 145102
DI 10.1088/0953-4075/41/14/145102
PG 5
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 322JE
UT WOS:000257370200006
ER

PT J
AU Zeitlin, C
   Guetersloh, S
   Heilbronn, L
   Miller, J
   Elkhayari, N
   Empl, A
   LeBourgeois, M
   Mayes, BW
   Pinsky, L
   Christl, M
   Kuznetsov, E
AF Zeitlin, C.
   Guetersloh, S.
   Heilbronn, L.
   Miller, J.
   Elkhayari, N.
   Empl, A.
   LeBourgeois, M.
   Mayes, B. W.
   Pinsky, L.
   Christl, M.
   Kuznetsov, E.
TI Shielding experiments with high-energy heavy ions for spaceflight
   applications
SO NEW JOURNAL OF PHYSICS
LA English
DT Article
ID CROSS-SECTIONS; FRAGMENTATION; FE-56; MODEL
AB Mitigation of radiation exposures received by astronauts on deep-space missions must be considered in the design of future spacecraft. The galactic cosmic rays (GCR) include high-energy heavy ions, many of which have ranges that exceed the depth of shielding that can be launched in realistic scenarios. Some of these ions are highly ionizing (producing a high dose per particle) and for some biological endpoints are more damaging per unit dose than sparsely ionizing radiation. The principal physical mechanism by which the dose and dose equivalent delivered by these particles can be reduced is nuclear fragmentation, the result of inelastic collisions between nuclei in the hull of the spacecraft and/or other materials. These interactions break the incident ions into lighter, less ionizing and less biologically effective particles. We have previously reported the tests of shielding effectiveness using many materials in a 1 GeV nucleon(-1) (56)Fe beam, and also reported results using a single polyethylene (CH(2)) target in a variety of beam ions and energies up to 1 GeV nucleon(-1). An important, but tentative, conclusion of those studies was that the average behavior of heavy ions in the GCR would be better simulated by heavy beams at energies above 1 GeV nucleon(-1). Following up on that work, we report new results using beams of (12)C, (28)Si and (56)Fe, each at three energies, 3, 5 and 10 GeV nucleon(-1), on carbon, polyethylene, aluminium and iron targets.
C1 [Zeitlin, C.; Guetersloh, S.; Heilbronn, L.; Miller, J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [Elkhayari, N.; Empl, A.; LeBourgeois, M.; Mayes, B. W.; Pinsky, L.] Univ Houston, Dept Phys, Houston, TX USA.
   [Christl, M.] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA.
   [Kuznetsov, E.] Univ Alabama, Dept Phys, Huntsville, AL 35899 USA.
RP Zeitlin, C (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM cjzeitlin@lbl.gov
RI Heilbronn, Lawrence/J-6998-2013
OI Heilbronn, Lawrence/0000-0002-8226-1057
NR 13
TC 5
Z9 6
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 1367-2630
J9 NEW J PHYS
JI New J. Phys.
PD JUL 28
PY 2008
VL 10
AR 075007
DI 10.1088/1367-2630/10/7/075007
PG 20
WC Physics, Multidisciplinary
SC Physics
GA 330TV
UT WOS:000257966600005
ER

PT J
AU Graves, CR
   Scott, BL
   Morris, DE
   Kiplinger, JL
AF Graves, Christopher R.
   Scott, Brian L.
   Morris, David E.
   Kiplinger, Jaqueline L.
TI Tetravalent and pentavalent uranium acetylide complexes prepared by
   oxidative functionalization with CuC CPh
SO ORGANOMETALLICS
LA English
DT Article
ID ELECTRONIC-STRUCTURE; CARBON BOND; METALLOCENE; REACTIVITY
AB Oxidation of(C(5)Me(5))(2)U(NPh(2))(THF) and(C(5)Me(5))(2)U(=N-2,6-(i)Pr(2)-C(6)H(3))(THF) with CuC  CPh yields the corresponding U(IV) and U(V) aceolide complexes (C(5)Me(5))(2)U(NPh(2))(C  CPh) and (C(5)Me(5))(2)U(=N-2,6-(i)Pr(2)-C(6)H(3))(C  CPh), respectively. The complexes were characterized using a combination of (1)H NMR, X-ray crystallography, UV-visible-near-IR spectroscopy, and cyclic voltammetry.
C1 [Graves, Christopher R.; Scott, Brian L.; Morris, David E.; Kiplinger, Jaqueline L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Morris, DE (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM kiplinger@lanl.gov
RI Morris, David/A-8577-2012; Kiplinger, Jaqueline/B-9158-2011; Scott,
   Brian/D-8995-2017
OI Kiplinger, Jaqueline/0000-0003-0512-7062; Scott,
   Brian/0000-0003-0468-5396
NR 18
TC 47
Z9 47
U1 1
U2 6
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0276-7333
J9 ORGANOMETALLICS
JI Organometallics
PD JUL 28
PY 2008
VL 27
IS 14
BP 3335
EP 3337
DI 10.1021/om800466m
PG 3
WC Chemistry, Inorganic & Nuclear; Chemistry, Organic
SC Chemistry
GA 329NJ
UT WOS:000257874000005
ER

PT J
AU Nadiga, BT
AF Nadiga, B. T.
TI Orientation of eddy fluxes in geostrophic turbulence
SO PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL
   AND ENGINEERING SCIENCES
LA English
DT Article
DE geostrophic turbulence; subgrid model; eddy flux of potential vorticity;
   ocean circulation; nonlinear gradient model; upgradient-downgradient
   flux
ID OCEAN CIRCULATION; MODEL; SIMULATION; EDDIES; FLOWS; PARAMETERIZATION;
   EQUATIONS
AB Given its importance in parametrizing eddies, we consider the orientation of eddy flux of potential vorticity (PV) in geostrophic turbulence. We take two different points of view, a classical ensemble- or time-average point of view and a second scale decomposition point of view. A net alignment of the eddy flux of PV with the appropriate mean gradient or the large-scale gradient of PV is required. However, we find this alignment to be very weak. A key finding of our study is that in the scale decomposition approach, there is a strong correlation between the eddy flux and a nonlinear combination of resolved gradients. This strong correlation is absent in the classical decomposition. This finding points to a new model to parametrize the effects of eddies in global ocean circulation.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Nadiga, BT (reprint author), Los Alamos Natl Lab, CCS-2, Los Alamos, NM 87545 USA.
EM balu@lanl.gov
NR 30
TC 14
Z9 14
U1 0
U2 0
PU ROYAL SOC
PI LONDON
PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND
SN 1364-503X
J9 PHILOS T R SOC A
JI Philos. Trans. R. Soc. A-Math. Phys. Eng. Sci.
PD JUL 28
PY 2008
VL 366
IS 1875
BP 2491
EP 2510
DI 10.1098/rsta.2008.0058
PG 20
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 310PZ
UT WOS:000256543700005
PM 18448416
ER

PT J
AU Weeks, ML
   Rahman, T
   Frymier, PD
   Islam, SK
   McKnight, TE
AF Weeks, Martha L.
   Rahman, Touhidur
   Frymier, Paul D.
   Islam, Syed K.
   McKnight, Timothy E.
TI A reagentless enzymatic amperometric biosensor using vertically aligned
   carbon nanofibers (VACNF)
SO SENSORS AND ACTUATORS B-CHEMICAL
LA English
DT Article
DE carbon nanofiber; biosensor; reagentless
ID NADH DETECTION; NANOTUBES; ELECTRODES
AB A reagentless amperometric enzymatic biosensor is constructed on a carbon substrate for detection of ethanol. Yeast alcohol dehydrogenase (YADH), an oxidoreductase, and its cofactor nicotinamide adenine dinucleotide (NAD(+)) are immobilized by adsorption and covalent attachment to the carbon substrate. Carbon nanofibers grown by plasma enhanced chemical vapor deposition (PECVD) are chosen as the electrode material due to their excellent structural and electrical properties. Electrochemical techniques are employed to test the functionality and performance of the biosensor using reduced form of nicotinamide adenine dinucleotide (NADH) which also determines the oxidation peak potential of NADH. Subsequently, amperometric measurements are conducted for detection of ethanol to determine the electrical current response due to the increase in analyte concentration. The detection range, storage stability, reusability, and response time of the biosensor are also examined. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Rahman, Touhidur; Islam, Syed K.] Univ Tennessee, Dept Elect Engn & Comp Sci, Knoxville, TN 37996 USA.
   [Weeks, Martha L.; Frymier, Paul D.] Univ Tennessee, Dept Chem & Biomol Engn, Knoxville, TN 37996 USA.
   [McKnight, Timothy E.] Oak Ridge Natl Lab, Mol Scale Engn & Nanoscale Technol Res Grp, Oak Ridge, TN 37831 USA.
RP Rahman, T (reprint author), Univ Tennessee, Dept Elect Engn & Comp Sci, 141 Ferris Hall,1508 Middle Dr, Knoxville, TN 37996 USA.
EM trahman@utk.edu
RI McKnight, Tim/H-3087-2011
OI McKnight, Tim/0000-0003-4326-9117
NR 9
TC 17
Z9 17
U1 1
U2 11
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-4005
J9 SENSOR ACTUAT B-CHEM
JI Sens. Actuator B-Chem.
PD JUL 28
PY 2008
VL 133
IS 1
BP 53
EP 59
DI 10.1016/j.snb.2008.01.060
PG 7
WC Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation
SC Chemistry; Electrochemistry; Instruments & Instrumentation
GA 331KL
UT WOS:000258011000008
ER

PT J
AU Hicks, JC
   Dabestani, R
   Buchanan, AC
   Jones, CW
AF Hicks, Jason C.
   Dabestani, Reza
   Buchanan, A. C., III
   Jones, Christopher W.
TI Assessing site-isolation of amine groups on aminopropyl-functionalized
   SBA-15 silica materials via spectroscopic and reactivity probes
SO INORGANICA CHIMICA ACTA
LA English
DT Article
DE site-isolation; amine accessibility; aminosilica; olefin polymerization;
   constrained-geometry catalysts; SBA-15
ID ETHYLENE POLYMERIZATION CATALYSTS; SURFACE PHOTOCHEMISTRY; ENGINEERING
   NANOSPACES; MESOPOROUS SILICA; ALUMINA SURFACES; FLUORESCENCE
   SPECTROSCOPY; CONTROLLABLE CHEMISTRY; THERMOLYTIC SYNTHESIS;
   SINGLE-SITE; PYRENE
AB The average degree of separation and the accessibility of aminopropyl groups on SBA-15 silica materials prepared using different silane grafting approaches are compared. Three specific synthetic approaches are used: (1) the traditional grafting of 3-aminopropyltri-methoxysilane in toluene, (2) a protection/deprotection method using benzyl- or trityl-spacer groups, and (3) a cooperative dilution method where 3-aminopropyltrimethoxysilane and methyltrimethoxysilane are co-condensed on the silica surface as a silane mixture. The site-isolation and accessibility of the amine groups are probed via three methods: (a) evaluation of pyrene groups adsorbed onto the solids using fluorescence spectroscopy, (b) the reactions of chlorodimethyl(2,3,4,5-tetramethyl-2,4-cyclopentadien-1-yl) silane (Cp'Si(Me) Cl-2) and chloro(cyclopenta-2,4-dienyl) dimethylsilane (CpSi( Me) 2Cl) with the tethered amine sites, and (c) comparison of the reactivity of zirconium constrained-geometry-inspired catalysts (CGCs) prepared using the Cp'Si(Me) 2-modified aminosilicas in the catalytic polymerization of ethylene to produce poly(ethylene). The spectroscopic probe of site-isolation suggests that both the protection/ deprotection method and the cooperative dilution method yield similarly isolated amine sites that are markedly more isolated than sites on traditional aminosilica. In contrast, both reactivity probes show that the protection/ deprotection strategy leads to more uniformly accessible amine groups. It is proposed that the reactivity probes are more sensitive tests for accessibility and site-isolation in this case. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Hicks, Jason C.; Jones, Christopher W.] Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA.
   [Dabestani, Reza; Buchanan, A. C., III] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Jones, CW (reprint author), Georgia Inst Technol, Sch Chem & Biomol Engn, 311 Ferst Dr, Atlanta, GA 30332 USA.
EM cjones@chbe.gatech.edu
NR 57
TC 19
Z9 19
U1 1
U2 20
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0020-1693
EI 1873-3255
J9 INORG CHIM ACTA
JI Inorg. Chim. Acta
PD JUL 27
PY 2008
VL 361
IS 11
BP 3024
EP 3032
DI 10.1016/j.ica.2008.01.002
PG 9
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 323VA
UT WOS:000257475300006
ER

PT J
AU Birnbaum, ER
   Trout, AT
   Boland, KS
   Sauer, NN
AF Birnbaum, Eva R.
   Trout, Andrew T.
   Boland, Kevin S.
   Sauer, Nancy N.
TI Nitric acid dissolution of large mixed cellulose ester filters for
   beryllium determination
SO INORGANICA CHIMICA ACTA
LA English
DT Article
DE beryllium; air sampling; analytical; dissolution; laboratory safety
ID MICROWAVE DIGESTION; PARTICULATE MATTER; AEROSOL SAMPLES;
   TRACE-ELEMENTS; SENSITIZATION; DISEASE; MATRIX; METALS
AB Defense program use of beryllium has resulted in the need for a wide variety of sampling methods to assess the potential for airborne beryllium particulates. One technique employed in field sampling uses large (8 x 10 in.) mixed cellulose ester (MCE) filters in high volume air samplers. Standard methods for the acid digestion and analysis of the large MCE filters cannot be utilized as the increase in filter mass leads to an uncontrolled exothermic reaction (open flames). As this compromises data quality and presents a significant safety hazard, we propose here an alternative method for digesting these large filters to ensure a solution compatible with ICP-AES (inductively coupled plasma-atomic emission spectroscopy) analysis. The method is a modification of well accepted hot plate digestion methods, which avoids the use of the most hazardous acids such as perchloric or hydrofluoric. While only beryllium was investigated, it is likely that other metals on filters could be digested by this method Filter media were spiked with a variety of beryllium sources to test the digestion, including beryllium solution spikes, beryllium metal, beryllium oxide and beryllium in soil. Recovery of beryllium metal (103%), beryllium in soil (96%) and beryllium solution spikes (93%) were excellent. Published by Elsevier B.V.
C1 [Birnbaum, Eva R.; Boland, Kevin S.; Sauer, Nancy N.] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA.
RP Birnbaum, ER (reprint author), Caldera Pharmaceut, 278 DP Rd,STE D, Los Alamos, NM 87544 USA.
EM eva@cpsci.com
OI Trout, Andrew/0000-0003-1431-4054
NR 29
TC 2
Z9 2
U1 0
U2 11
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0020-1693
J9 INORG CHIM ACTA
JI Inorg. Chim. Acta
PD JUL 27
PY 2008
VL 361
IS 11
BP 3069
EP 3074
DI 10.1016/j.ica.2008.01.039
PG 6
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 323VA
UT WOS:000257475300011
ER

PT J
AU Bauer, E
   Ehler, D
   Diyabalanage, H
   Sauer, NN
   McCleskey, TM
AF Bauer, Eve
   Ehler, Deborah
   Diyabalanage, Himashinie
   Sauer, Nancy N.
   McCleskey, T. Mark
TI Protein and ligand enhanced dissolution of BeO at pH 7
SO INORGANICA CHIMICA ACTA
LA English
DT Article
DE beryllium; dissolution; protein; citric acid; transferrin
ID CHRONIC BERYLLIUM DISEASE; COORDINATION CHEMISTRY; AQUEOUS-SOLUTION;
   COMPLEXES; OXIDE
AB Be is a toxic metal used in both aerospace and defense industries. Lung exposure to Be can lead to a specific immune response called chronic beryllium disease (CBD). CBD has the unique characteristics that it can be triggered by very low level exposures, yet the onset of systems can be delayed from one to over 20 years. This variable delay in the onset of systems implies that a change in the local environment leads to dissolution and bio-availability of the particulate Be. We report here on the dissolution of the highly insoluble BeO in the presence of known Be ligands including the iron transport protein, transferrin, and the ubiquitous citric acid. The presence of ligands even at the 100 mu M level led to dissolution of Be to levels that have been shown to cause immune response in both the blood and the lung. Dissolution occurred at pH 7 and was significantly enhanced in a 10 mM phosphate buffer. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Bauer, Eve; Ehler, Deborah; Diyabalanage, Himashinie; Sauer, Nancy N.; McCleskey, T. Mark] Los Alamos Natl Lab, MPA MC, Los Alamos, NM 87545 USA.
RP McCleskey, TM (reprint author), Los Alamos Natl Lab, MPA MC, Mail Stop J514, Los Alamos, NM 87545 USA.
EM tmark@lanl.gov
RI McCleskey, Thomas/J-4772-2012; 
OI Mccleskey, Thomas/0000-0003-3750-3245
NR 19
TC 3
Z9 4
U1 0
U2 2
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0020-1693
J9 INORG CHIM ACTA
JI Inorg. Chim. Acta
PD JUL 27
PY 2008
VL 361
IS 11
BP 3075
EP 3078
DI 10.1016/j.ica.2008.01.032
PG 4
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 323VA
UT WOS:000257475300012
ER

PT J
AU Vasbinder, MJ
   Bakac, A
AF Vasbinder, Michael J.
   Bakac, Andreja
TI Kinetics and mechanism of the reactions of ozone with superoxo,
   hydroperoxo, and hydrido complexes of rhodium(III)
SO INORGANICA CHIMICA ACTA
LA English
DT Article
DE ozone; hydroperoxo; superoxo; hydrido; rhodium; kinetics
ID HYDROGEN-ATOM TRANSFER; AQUEOUS-SOLUTIONS; PEROXIDE; WATER;
   DECOMPOSITION; DERIVATIVES; REACTIVITY; OXIDATION; EXCHANGE; PRODUCT
AB Oxidation of the title complexes with ozone takes place by hydrogen atom, hydride, and electron transfer mechanisms. The reaction with (NH(3))(4)(H(2)O)RhH(2+) is a two electron process, believed to involve hydride transfer with a rate constant k = (2.2 +/- 0.2) x 10(5) M(-1) s(-1) and an isotope effect k(H)/k(D) = 2. The oxidation of (NH(3))(4)(H(2)O)RhOOH(2+) to (NH(3))(4)(H(2)O)RhOO(2+) by an apparent hydrogen atom transfer is quantitative and fast, k = (6.9 +/- 0.3) x 10(3) M(-1) s(-1), and constitutes a useful route for the preparation of the superoxo complex. The latter is also oxidized by ozone, but more slowly, k = 480 +/- 50 M(-1) s(-1). (C) 2007 Elsevier B.V. All rights reserved.
C1 [Vasbinder, Michael J.; Bakac, Andreja] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
RP Bakac, A (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
EM bakac@ameslab.gov
NR 24
TC 5
Z9 5
U1 1
U2 1
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0020-1693
J9 INORG CHIM ACTA
JI Inorg. Chim. Acta
PD JUL 27
PY 2008
VL 361
IS 11
BP 3193
EP 3198
DI 10.1016/j.ica.2007.11.022
PG 6
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 323VA
UT WOS:000257475300028
ER

PT J
AU Huang, KW
   Grills, DC
   Han, JH
   Szalda, DJ
   Fujita, E
AF Huang, Kuo-Wei
   Grills, David C.
   Han, Joseph H.
   Szalda, David J.
   Fujita, Etsuko
TI Selective decarbonylation by a pincer PCP-rhodium(I) complex
SO INORGANICA CHIMICA ACTA
LA English
DT Article
DE Selective decarbonylation; Steric effect; Pincer; Rhodium
ID NOBLE METAL COMPOUNDS; EFFECTIVE CORE POTENTIALS; MOLECULAR-ORBITAL
   METHODS; GAUSSIAN-TYPE BASIS; ORGANIC SYNTHESES; RHODIUM COMPLEX;
   CATALYZED DECARBONYLATION; CARBON-DIOXIDE; ACYL HALIDES; ALDEHYDES
AB Here we report a highly selective stoichiometric decarbonylation reaction for alkylformates and alkynyl aldehydes by a rhodium-dinitrogen complex (PCP-Rh-N-2) at room temperature. While electronic effects of the substrates cannot be completely ruled out, the selectivity is rationalized by a steric effect, consistent with the results of an X-ray crystallographic study and density functional theory (DFT) modeling. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Huang, Kuo-Wei; Grills, David C.; Fujita, Etsuko] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
   [Han, Joseph H.] Penguin Computing, San Francisco, CA 94107 USA.
   [Szalda, David J.] Bard Coll, Dept Nat Sci, New York, NY 10010 USA.
RP Huang, KW (reprint author), Natl Univ Singapore, Dept Chem, 3 Sci Dr 3, Singapore 117543, Singapore.
EM hkw@nus.edu.sg; fujita@bnl.gov
RI Fujita, Etsuko/D-8814-2013; Huang, Kuo-Wei/H-2303-2011; Grills,
   David/F-7196-2016
OI Huang, Kuo-Wei/0000-0003-1900-2658; Grills, David/0000-0001-8349-9158
FU Division of Chemical Sciences; Division of Geosciences; Division of
   Biosciences; US Department of Energy [DE-AC02-98CH10886]; BNL; Office of
   Basic Energy Sciences
FX This work was performed at Brookhaven National Laboratory (BNL) and
   funded under Contract DE-AC02-98CH10886 with the US Department of
   Energy, supported by its Division of Chemical Sciences, Geosciences, and
   Biosciences, Office of Basic Energy Sciences. K.-W.H. is grateful for a
   Gertrude and Maurice Goldhaber Distinguished Fellowship from BNL.
NR 27
TC 15
Z9 15
U1 0
U2 13
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0020-1693
J9 INORG CHIM ACTA
JI Inorg. Chim. Acta
PD JUL 27
PY 2008
VL 361
IS 11
BP 3327
EP 3331
DI 10.1016/j.ica.2008.01.045
PG 5
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 323VA
UT WOS:000257475300046
ER

PT J
AU Aziz, Z
   van Geen, A
   Stute, M
   Versteeg, R
   Horneman, A
   Zheng, Y
   Goodbred, S
   Steckler, M
   Weinman, B
   Gavrieli, I
   Hoque, MA
   Shamsudduha, M
   Ahmed, KM
AF Aziz, Z.
   van Geen, A.
   Stute, M.
   Versteeg, R.
   Horneman, A.
   Zheng, Y.
   Goodbred, S.
   Steckler, M.
   Weinman, B.
   Gavrieli, I.
   Hoque, M. A.
   Shamsudduha, M.
   Ahmed, K. M.
TI Impact of local recharge on arsenic concentrations in shallow aquifers
   inferred from the electromagnetic conductivity of soils in Araihazar,
   Bangladesh
SO WATER RESOURCES RESEARCH
LA English
DT Article
ID GANGES-BRAHMAPUTRA DELTA; ELECTRICAL-CONDUCTIVITY; BENGAL BASIN;
   INDUCTION MEASUREMENTS; GROUNDWATER DYNAMICS; SPATIAL VARIABILITY; DEPTH
   RELATIONS; DRINKING-WATER; WEST-BENGAL; FIELD
AB The high-degree of spatial variability of dissolved As levels in shallow aquifers of the Bengal Basin has been well documented but the underlying mechanisms remain poorly understood. We compare here As concentrations measured in groundwater pumped from 4700 wells < 22 m (75 ft) deep across a 25 km(2) area of Bangladesh with variations in the nature of surface soils inferred from 18,500 measurements of frequency domain electromagnetic induction. A set of 14 hand auger cores recovered from the same area indicate that a combination of grain size and the conductivity of soil water dominate the electromagnetic signal. The relationship between pairs of individual EM conductivity and dissolved As measurements within a distance of 50 m is significant but highly scattered (r(2) = 0.12; n = 614). Concentrations of As tend to be lower in shallow aquifers underlying sandy soils and higher below finer-grained and high conductivity soils. Variations in EM conductivity account for nearly half the variance of the rate of increase of As concentration with depth, however, when the data are averaged over a distance of 50 m (r(2) = 0.50; n = 145). The association is interpreted as an indication that groundwater recharge through permeable sandy soils prevents As concentrations from rising in shallow reducing groundwater.
C1 [Aziz, Z.] Columbia Univ, Dept Earth & Environm Sci, New York, NY 10027 USA.
   [Aziz, Z.; van Geen, A.; Stute, M.; Horneman, A.; Zheng, Y.; Steckler, M.] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA.
   [Stute, M.] Barnard Coll, Dept Environm Sci, New York, NY USA.
   [Versteeg, R.] Idaho Natl Lab, Idaho Falls, ID USA.
   [Zheng, Y.] CUNY Queens Coll, New York, NY USA.
   [Goodbred, S.; Weinman, B.] Vanderbilt Univ, Nashville, TN USA.
   [Gavrieli, I.] Geol Survey Israel, IL-95501 Jerusalem, Israel.
   [Hoque, M. A.; Shamsudduha, M.; Ahmed, K. M.] Univ Dhaka, Dept Geol, Dhaka 1000, Bangladesh.
RP Aziz, Z (reprint author), Columbia Univ, Dept Earth & Environm Sci, New York, NY 10027 USA.
RI Goodbred, Steven/A-1737-2011; Hoque, Mohammad/I-3800-2013; 
OI Goodbred, Steven/0000-0001-7626-9864; Hoque,
   Mohammad/0000-0002-8271-6760; Ahmed, Kazi Matin/0000-0001-5188-4385
NR 67
TC 34
Z9 36
U1 3
U2 24
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0043-1397
J9 WATER RESOUR RES
JI Water Resour. Res.
PD JUL 26
PY 2008
VL 44
IS 7
AR W07416
DI 10.1029/2007WR006000
PG 15
WC Environmental Sciences; Limnology; Water Resources
SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water
   Resources
GA 331HP
UT WOS:000258003600001
ER

PT J
AU Park, Y
   Nyblade, AA
   Rodgers, AJ
   Al-Amri, A
AF Park, Yongcheol
   Nyblade, Andrew A.
   Rodgers, Arthur J.
   Al-Amri, Abdullah
TI S wave velocity structure of the Arabian Shield upper mantle from
   Rayleigh wave tomography
SO GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
LA English
DT Article
DE Arabian shield; mantle; mantle plume; Rayleigh wave; tomography; shear
   wave velocity
ID WESTERN SAUDI-ARABIA; RED-SEA; LITHOSPHERIC STRUCTURE; RECEIVER
   FUNCTIONS; CRUSTAL STRUCTURE; BASALT PROVINCE; JOINT INVERSION; YEMEN
   PLATEAU; BENEATH; PROPAGATION
AB The shear wave velocity structure of the shallow upper mantle beneath the Arabian Shield was modeled by inverting Rayleigh wave phase velocity measurements between 45 and 140 s together with previously published Rayleigh wave group velocity measurements between 10 and 45 s. For measuring phase velocities, we applied a modified array method to data from several regional networks that minimizes the distortion of raypaths caused by lateral heterogeneity. The new shear wave velocity model shows a broad low-velocity region to depths of similar to 150 km in the mantle across the Shield and a narrower low-velocity region at depths similar to 150 km localized along the Red Sea coast and Makkah-Madinah-Nafud (MMN) volcanic line. The velocity reduction in the upper mantle corresponds to a temperature anomaly of similar to 250-330 K. These findings, in particular the region of continuous low velocities along the Red Sea and MMN volcanic line, do not support interpretations for the origin of the Cenozoic plateau uplift and volcanism on the Shield invoking two separate plumes. When combined with images of the 410 and 660 km discontinuities, body wave tomographic models, a S wave polarization analysis, and SKS splitting results for the Arabian Peninsula, the anomalous upper mantle structure in our new velocity model can be attributed to an upwelling of warm mantle rock originating in the lower mantle under Africa that crosses through the mantle transition zone beneath Ethiopia and moves to the north and northwest under the eastern margin of the Red Sea and the Arabian Shield. In this interpretation, the difference in mean elevation between the Arabian Platform and Shield can be attributed to isostatic uplift caused by heating of the lithospheric mantle under the Shield, with the significantly higher elevations along the Red Sea coast possibly resulting also from lithospheric thinning and dynamic uplift.
C1 [Park, Yongcheol; Nyblade, Andrew A.] Penn State Univ, Dept Geosci, University Pk, PA 16802 USA.
   [Rodgers, Arthur J.] Lawrence Livermore Natl Lab, Geophys & Global Secur Div, Livermore, CA 94551 USA.
   [Al-Amri, Abdullah] King Saud Univ, Geophys Observ, Riyadh 11451, Saudi Arabia.
RP Park, Y (reprint author), Natl Inst Meteorol Res, Global Environm Syst Res Lab, 45 Gisangcheong Gil, Seoul 156720, South Korea.
EM ypark@kma.go.kr
RI Rodgers, Arthur/E-2443-2011
NR 72
TC 29
Z9 29
U1 0
U2 8
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 1525-2027
J9 GEOCHEM GEOPHY GEOSY
JI Geochem. Geophys. Geosyst.
PD JUL 25
PY 2008
VL 9
AR Q07020
DI 10.1029/2007GC001895
PG 15
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 331EI
UT WOS:000257995100001
ER

PT J
AU Nowak, M
   Helleboid-Chapman, A
   Jakel, H
   Moitrot, E
   Rommens, C
   Pennacchio, LA
   Fruchart-Najib, J
   Fruchart, JC
AF Nowak, Maxime
   Helleboid-Chapman, Audrey
   Jakel, Heidelinde
   Moitrot, Emmanuelle
   Rommens, Corinne
   Pennacchio, Len A.
   Fruchart-Najib, Jamila
   Fruchart, Jean-Charles
TI Glucose regulates the expression of the apolipoprotein A5 gene
SO JOURNAL OF MOLECULAR BIOLOGY
LA English
DT Article
DE apolipoprotein A5; gene regulation; glucose; USF; cardiovascular disease
ID UPSTREAM STIMULATORY FACTOR; PLASMA TRIGLYCERIDE LEVELS; PYRUVATE-KINASE
   GENE; PENTOSE-PHOSPHATE PATHWAY; ACTIVATED RECEPTOR-ALPHA;
   ELEMENT-BINDING PROTEIN; FATTY-ACID SYNTHASE; RESPONSE ELEMENT;
   TRANSCRIPTIONAL REGULATION; BETA-CELLS
AB The apolipoprotein A5 gene (APOA5) is a key player in determining triglyceride concentrations in humans and mice. Since diabetes is often associated with hypertriglyceridemia, this study explores whether APOA5 gene expression is regulated by alteration in glucose homeostasis and the related pathways. D-Glucose activates APOA5 gene expression in a time- and dose-dependent manner in hepatocytes, and the glycolytic pathway involved was determined using D-glucose analogues and metabolites. Together, transient transfections, electrophoretic mobility shift assays and chromatin immunoprecipitation assays show that this regulation occurs at the transcriptional level through an increase of USF1/2 binding to an E-box in the APOA5 promoter. We show that this phenomenon is not due to an increase of mRNA or protein expression levels of USE Using protein phosphatases 1 and 2A inhibitor, we demonstrate that D-glucose regulates the APOA5 gene via a dephosphorylation mechanism, resulting in an enhanced USF1/2-promoter binding. Last, subsequent suppressions of USF1/2 and phosphatases mRNA through siRNA gene silencing abolished the regulation. We demonstrate that the APOA5 gene is up regulated by D-glucose and USF through phosphatase activation. These findings may provide a new cross-talk between glucose and lipid metabolism. (C) 2008 Published by Elsevier Ltd.
C1 [Nowak, Maxime; Helleboid-Chapman, Audrey; Jakel, Heidelinde; Moitrot, Emmanuelle; Rommens, Corinne; Fruchart-Najib, Jamila; Fruchart, Jean-Charles] Univ Lille 2, F-59006 Lille, France.
   [Nowak, Maxime; Helleboid-Chapman, Audrey; Jakel, Heidelinde; Moitrot, Emmanuelle; Rommens, Corinne; Fruchart, Jean-Charles] Inst Pasteur, Dept Atherosclerose, F-59019 Lille, France.
   [Nowak, Maxime; Helleboid-Chapman, Audrey; Jakel, Heidelinde; Moitrot, Emmanuelle; Rommens, Corinne; Fruchart, Jean-Charles] INSERM, U545, F-59019 Lille, France.
   [Pennacchio, Len A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Genom Div, Berkeley, CA 94720 USA.
   [Pennacchio, Len A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Joint Genome Inst, Berkeley, CA 94720 USA.
RP Fruchart-Najib, J (reprint author), Univ Lille 2, F-59006 Lille, France.
EM jamila.fruchart@univ-lille2.fr
NR 47
TC 13
Z9 15
U1 0
U2 0
PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 0022-2836
J9 J MOL BIOL
JI J. Mol. Biol.
PD JUL 25
PY 2008
VL 380
IS 5
BP 789
EP 798
DI 10.1016/j.jmb.2008.04.057
PG 10
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 335DZ
UT WOS:000258272300003
PM 18572192
ER

PT J
AU Chrencik, JE
   Brooun, A
   Zhang, H
   Mathews, II
   Hura, GL
   Foster, SA
   Perry, JJP
   Streiff, M
   Ramage, P
   Widmer, H
   Bokoch, GM
   Tainer, JA
   Weckbecker, G
   Kuhn, P
AF Chrencik, Jill E.
   Brooun, Alexei
   Zhang, Hui
   Mathews, Irimpan I.
   Hura, Greg L.
   Foster, Scott A.
   Perry, J. Jefferson P.
   Streiff, Markus
   Ramage, Paul
   Widmer, Hans
   Bokoch, Gary M.
   Tainer, John A.
   Weckbecker, Gisbert
   Kuhn, Peter
TI Structural basis of guanine nucleotide exchange mediated by the T-Cell
   essential Vav1
SO JOURNAL OF MOLECULAR BIOLOGY
LA English
DT Article
DE GTPase; guanine nucleotide exchange; protein-protein interaction;
   transplantation
ID X-RAY SOLUTION; DBL HOMOLOGY DOMAIN; RHO-GTPASES; PLECKSTRIN HOMOLOGY;
   PH DOMAIN; MACROMOLECULAR STRUCTURES; SOLUTION SCATTERING;
   CRYSTAL-STRUCTURE; DIFFRACTION DATA; ACTIVATION
AB The guanine nucleotide exchange factor (GEF) Vav1 plays an important role in T-cell activation and tumorigenesis. In the GET superfamily, Vav1 has the ability to interact with multiple families of Rho GTPases. The structure of the Vav1 DH-PH-CRD/Rac1 complex to 2.6 angstrom resolution reveals a unique intramolecular network of contacts between the Vav1 cysteine-rich domain (CRD) and the C-terminal helix of the Vav1 Dbl homology (DH) domain. These unique interactions stabilize the Vav1 DH domain for its intimate association with the Switch II region of Rac1 that is critical for the displacement of the guanine nucleotide. Small angle x-ray scattering (SAXS) studies support this domain arrangement for the complex in solution. Further, mutational analyses confirms that the atypical CRD is critical for maintaining both optimal guanine nucleotide exchange activity and broader specificity of Vav family GEFs. Taken together, the data outline the detailed nature of Vav1's ability to contact a range of Rho GTPases using a novel protein-protein hateraction network. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Chrencik, Jill E.; Brooun, Alexei; Foster, Scott A.; Kuhn, Peter] Scripps Res Inst, Dept Cellular Biol, La Jolla, CA 92037 USA.
   [Zhang, Hui; Bokoch, Gary M.] Scripps Res Inst, Dept Immunol, La Jolla, CA 92037 USA.
   [Mathews, Irimpan I.] Stanford Synchrotron Radiat Lab, Palo Alto, CA 94305 USA.
   [Hura, Greg L.; Perry, J. Jefferson P.; Tainer, John A.] Scripps Res Inst, Dept Mol Biol, La Jolla, CA 92037 USA.
   [Perry, J. Jefferson P.] Amrita Vishwa Vidyapeetham, Sch Biotechnol, Kollam, Kerala, India.
   [Streiff, Markus; Weckbecker, Gisbert] Novartis Pharma AG, NIBR, CH-4002 Basel, Switzerland.
   [Tainer, John A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [Ramage, Paul; Widmer, Hans] NIBR, Prot Struct Unit, CH-4002 Basel, Switzerland.
RP Brooun, A (reprint author), Pfizer Inc, 10646 Sci Ctr Dr CB2, San Diego, CA 92121 USA.
EM Alexei.brooun@pfizer.com; pkuhn@scripps.edu
FU NCI NIH HHS [Y1-CO-1020]; NHLBI NIH HHS [R01 HL048008]; NIGMS NIH HHS
   [GM074961, U54 GM074961, U54 GM074961-030001, Y1-GM-1104]
NR 47
TC 27
Z9 27
U1 0
U2 2
PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 0022-2836
J9 J MOL BIOL
JI J. Mol. Biol.
PD JUL 25
PY 2008
VL 380
IS 5
BP 828
EP 843
DI 10.1016/j.jmb.2008.05.024
PG 16
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 335DZ
UT WOS:000258272300007
PM 18589439
ER

PT J
AU Arsene, I
   Bearden, IG
   Beavis, D
   Bekele, S
   Besliu, C
   Budick, B
   Boggild, H
   Chasman, C
   Dalsgaard, HH
   Debbe, R
   Fox, B
   Gaardhoje, JJ
   Hagel, K
   Jipa, A
   Johnson, EB
   Karabowicz, R
   Katrynska, N
   Kim, EJ
   Larsen, TM
   Lee, JH
   Lovhoiden, G
   Majka, Z
   Murray, M
   Nygaard, C
   Natowitz, J
   Nielsen, BS
   Pal, D
   Qviler, A
   Ristea, C
   Rohrich, D
   Sanders, SJ
   Staszel, P
   Tveter, TS
   Videbaek, F
   Yang, H
   Wada, R
AF Arsene, I.
   Bearden, I. G.
   Beavis, D.
   Bekele, S.
   Besliu, C.
   Budick, B.
   Boggild, H.
   Chasman, C.
   Dalsgaard, H. H.
   Debbe, R.
   Fox, B.
   Gaardhoje, J. J.
   Hagel, K.
   Jipa, A.
   Johnson, E. B.
   Karabowicz, R.
   Katrynska, N.
   Kim, E. J.
   Larsen, T. M.
   Lee, J. H.
   Lovhoiden, G.
   Majka, Z.
   Murray, M.
   Nygaard, C.
   Natowitz, J.
   Nielsen, B. S.
   Pal, D.
   Qviler, A.
   Ristea, C.
   Rohrich, D.
   Sanders, S. J.
   Staszel, P.
   Tveter, T. S.
   Videbaek, F.
   Yang, H.
   Wada, R.
CA BRAHMS Collaboration
TI Single-transverse-spin asymmetries of identified charged hadrons in
   polarized pp collisions at root s=62.4 GeV
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID GEV-C; FRAGMENTATION; SCATTERING
AB The first measurements of x(F)-dependent single- spin asymmetries of identified charged hadrons, pi(+/-), K(+/-), and protons, from transversely polarized proton- proton collisions at 62.4 GeV at RHIC are presented. Large asymmetries are seen in the pion and kaon channels. The asymmetries in inclusive pi(+/-) production, A(N)(pi(+)), increase with x(F) from 0 to similar to 0.25 and A(N)(pi(-)) decrease from 0 to similar to - 0.4. Observed asymmetries for K(-) unexpectedly show positive values similar to those for K(+), increasing with x(F), whereas proton asymmetries are consistent with zero over the measured kinematic range. Comparisons of the data with predictions of QCD- based models are presented.
C1 [Arsene, I.; Lovhoiden, G.; Qviler, A.; Tveter, T. S.] Univ Oslo, Dept Phys, Oslo, Norway.
   [Beavis, D.; Chasman, C.; Debbe, R.; Fox, B.; Videbaek, F.] Brookhaven Natl Lab, Upton, NY 11973 USA.
   [Karabowicz, R.; Katrynska, N.; Majka, Z.; Staszel, P.] Jagiellonian Univ, Smoluchowski Inst Phys, Krakow, Poland.
   [Budick, B.] NYU, New York, NY 10003 USA.
   [Bearden, I. G.; Boggild, H.; Dalsgaard, H. H.; Gaardhoje, J. J.; Larsen, T. M.; Nygaard, C.; Nielsen, B. S.; Ristea, C.] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark.
   [Hagel, K.; Natowitz, J.; Wada, R.] Texas A&M Univ, College Stn, TX 77843 USA.
   [Rohrich, D.; Yang, H.] Univ Bergen, Dept Phys, Bergen, Norway.
   [Besliu, C.; Jipa, A.] Univ Bucharest, Bucharest, Romania.
   [Bekele, S.; Johnson, E. B.; Kim, E. J.; Murray, M.; Pal, D.; Sanders, S. J.] Univ Kansas, Lawrence, KS 66049 USA.
RP Arsene, I (reprint author), Univ Oslo, Dept Phys, Oslo, Norway.
RI Christensen, Christian Holm/A-4901-2010; Yang, Hongyan/J-9826-2014;
   Bearden, Ian/M-4504-2014; Christensen, Christian/D-6461-2012
OI Christensen, Christian Holm/0000-0002-1850-0121; Bearden,
   Ian/0000-0003-2784-3094; Christensen, Christian/0000-0002-1850-0121
FU DoE (USA); NSRC (Denmark); RC (Norway); SCSR (Poland); MoR (Romania);
   Renaissance Technologies Corp
FX We thank F. Yuan, U. D'Alesio and Y. Koike for providing us with their
   calculations. This work was supported by the office of NP in DoE (USA),
   NSRC (Denmark), RC (Norway), SCSR (Poland), MoR (Romania), and a
   sponsored research grant from Renaissance Technologies Corp.
NR 30
TC 101
Z9 101
U1 0
U2 3
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 25
PY 2008
VL 101
IS 4
AR 042001
DI 10.1103/PhysRevLett.101.042001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 337HV
UT WOS:000258427100012
PM 18764320
ER

PT J
AU Boixo, S
   Datta, A
   Davis, MJ
   Flammia, ST
   Shaji, A
   Caves, CM
AF Boixo, Sergio
   Datta, Animesh
   Davis, Matthew J.
   Flammia, Steven T.
   Shaji, Anil
   Caves, Carlton M.
TI Quantum metrology: Dynamics versus entanglement
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID BOSE-EINSTEIN CONDENSATION; CESIUM; GASES
AB A parameter whose coupling to a quantum probe of n constituents includes all two-body interactions between the constituents can be measured with an uncertainty that scales as 1/n(3/2), even when the constituents are initially unentangled. We devise a protocol that achieves the 1/n(3/2) scaling without generating any entanglement among the constituents, and we suggest that the protocol might be implemented in a two-component Bose-Einstein condensate.
C1 [Boixo, Sergio; Datta, Animesh; Shaji, Anil; Caves, Carlton M.] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA.
   [Boixo, Sergio] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Davis, Matthew J.; Caves, Carlton M.] Univ Queensland, Sch Phys Sci, Brisbane, Qld 4072, Australia.
   [Flammia, Steven T.] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada.
RP Boixo, S (reprint author), Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA.
EM shaji@unm.edu
RI Davis, Matthew/A-1464-2008; Datta, Animesh/E-8139-2011; Shaji,
   Anil/A-3443-2012; Caves, Carlton/K-8167-2014; Flammia,
   Steven/C-8637-2009
OI Davis, Matthew/0000-0001-8337-0784; Datta, Animesh/0000-0003-4021-4655;
   Caves, Carlton/0000-0001-8876-1186; Flammia, Steven/0000-0002-3975-0226
FU U. S. Office of Naval Research [N00014-07-1-0304]; Australian Research
   Council's Discovery Projects [DP0343094]; National Nuclear Security
   Administration of the U. S. Department of Energy [DE-AC52-06NA25396];
   Perimeter Institute for Theoretical Physics; Industry Canada; Ministry
   of Research Innovation
FX The authors thank I. H. Deutsch and G. J. Milburn for advice on the
   theory and practice of atomic BECs. This work was supported in part by
   the U. S. Office of Naval Research (Grant No. N00014-07-1-0304), the
   Australian Research Council's Discovery Projects funding scheme (Project
   No. DP0343094), and the National Nuclear Security Administration of the
   U. S. Department of Energy (Contract No. DE-AC52-06NA25396). S. T. F.
   was supported by the Perimeter Institute for Theoretical Physics;
   research at Perimeter is supported by the Government of Canada through
   Industry Canada and by the Province of Ontario through the Ministry of
   Research & Innovation.
NR 19
TC 85
Z9 87
U1 0
U2 9
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 25
PY 2008
VL 101
IS 4
AR 040403
DI 10.1103/PhysRevLett.101.040403
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 337HV
UT WOS:000258427100003
PM 18764311
ER

PT J
AU Gregori, G
   Glenzer, SH
   Fournier, KB
   Campbell, KM
   Dewald, EL
   Jones, OS
   Hammer, JH
   Hansen, SB
   Wallace, RJ
   Landen, OL
AF Gregori, G.
   Glenzer, S. H.
   Fournier, K. B.
   Campbell, K. M.
   Dewald, E. L.
   Jones, O. S.
   Hammer, J. H.
   Hansen, S. B.
   Wallace, R. J.
   Landen, O. L.
TI X-ray scattering measurements of radiative heating and cooling dynamics
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID THOMSON SCATTERING; LASER; WAVE; SPECTROSCOPY; PLASMAS; DRIVEN; MODEL
AB Spectrally and time-resolved x-ray scattering is used to extract the temperature and charge state evolution in a near solid density carbon foam driven by a supersonic soft x-ray heat wave. The measurements show a rapid heating of the foam material (similar to 200 eV/ns) followed by a similarly fast decline in the electron temperature as the foam cools. The results are compared to an analytic power balance model and to results from radiation-hydrodynamics simulations. Finally, the combination of charge state and temperature extracted from this known density isochorically heated plasma is used to distinguish between dense plasma ionization balance models.
C1 [Gregori, G.; Glenzer, S. H.; Fournier, K. B.; Campbell, K. M.; Dewald, E. L.; Jones, O. S.; Hammer, J. H.; Hansen, S. B.; Wallace, R. J.; Landen, O. L.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
   [Gregori, G.] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England.
RP Gregori, G (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA.
NR 26
TC 39
Z9 40
U1 0
U2 2
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 JUL 25
PY 2008
VL 101
IS 4
AR 045003
DI 10.1103/PhysRevLett.101.045003
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 337HV
UT WOS:000258427100028
PM 18764336
ER

PT J
AU Huotari, S
   Hamalainen, K
   Diamant, R
   Sharon, R
   Kao, CC
   Deutsch, M
AF Huotari, S.
   Hamalainen, K.
   Diamant, R.
   Sharon, R.
   Kao, C. C.
   Deutsch, M.
TI Intrashell electron-interaction-mediated photoformation of hollow atoms
   near threshold
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DOUBLE PHOTOIONIZATION; HYPERSATELLITE SPECTRA; CROSS-SECTION;
   BETA-DECAY; IONIZATION; HELIUM; TRANSITION; EXCITATION; ALPHA;
   ABSORPTION
AB Double photoionization (DPI) of an atom by a single photon is a direct consequence of electron-electron interactions within the atom. We have measured the evolution of the K-shell DPI from threshold up in transition metals by high-resolution x-ray emission spectroscopy of the K(h)alpha hypersatellites, photoexcited by monochromatized synchrotron radiation. The measured evolution of the single-to-double photoionization cross-section ratio with excitation energy was found to be universal. Theoretical fits suggest that near threshold DPI is predominantly a semiclassical knockout effect, rather than the purely quantum-mechanical shake-off observed at the infinite photon energy limit.
C1 [Huotari, S.] European Synchrotron Radiat Facil, F-38043 Grenoble, France.
   [Hamalainen, K.] Univ Helsinki, Dept Phys, Div Mat Phys, FI-00014 Helsinki, Finland.
   [Diamant, R.; Sharon, R.; Deutsch, M.] Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel.
   [Kao, C. C.] Brookhaven Natl Lab, NSLS, Upton, NY 11973 USA.
RP Huotari, S (reprint author), European Synchrotron Radiat Facil, 6 Rue Jules Horowitz,BP 220, F-38043 Grenoble, France.
EM deutsch@mail.biu.ac.il
RI Hamalainen, Keijo/A-3986-2010; 
OI Hamalainen, Keijo/0000-0002-9234-9810; Huotari, Simo/0000-0003-4506-8722
FU NSLS; ESRF; Israel Science Foundation, Jerusalem; Academy of Finland
   [201291, 205967]
FX An important discussion with M. Amusia (Hebrew University, Jerusalem),
   and advice and experimental support by Z. Yin, L. E. Berman (NSLS), J.
   P. Rueff, R. Verbeni, and G. Monaco (ESRF) are gratefully acknowledged.
   We thank The Israel Science Foundation, Jerusalem (M. D.) and the
   Academy of Finland (Contract Nos. 201291 and 205967 for K. H.) for
   support, and NSLS and ESRF for beam time.
NR 33
TC 15
Z9 15
U1 2
U2 3
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 25
PY 2008
VL 101
IS 4
AR 043001
DI 10.1103/PhysRevLett.101.043001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 337HV
UT WOS:000258427100014
PM 18764322
ER

PT J
AU Mikhaylushkin, AS
   Simak, SI
   Burakovsky, L
   Chen, SP
   Johansson, B
   Preston, DL
   Swift, DC
   Belonoshko, AB
AF Mikhaylushkin, A. S.
   Simak, S. I.
   Burakovsky, L.
   Chen, S. P.
   Johansson, B.
   Preston, D. L.
   Swift, D. C.
   Belonoshko, A. B.
TI Comment on "Molybdenum at high pressure and temperature: Melting from
   another solid phase'' - Reply
SO PHYSICAL REVIEW LETTERS
LA English
DT Editorial Material
ID STABILITY
C1 [Mikhaylushkin, A. S.; Simak, S. I.] Linkoping Univ, IFM, S-58183 Linkoping, Sweden.
   [Burakovsky, L.; Chen, S. P.; Swift, D. C.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   [Preston, D. L.] Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA.
   [Johansson, B.] Uppsala Univ, Dept Phys, S-75121 Uppsala, Sweden.
   [Johansson, B.; Belonoshko, A. B.] Royal Inst Technol, S-10044 Stockholm, Sweden.
RP Mikhaylushkin, AS (reprint author), Linkoping Univ, IFM, S-58183 Linkoping, Sweden.
RI Simak, Sergei/C-3030-2014
OI Simak, Sergei/0000-0002-1320-389X
NR 7
TC 18
Z9 19
U1 2
U2 14
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 25
PY 2008
VL 101
IS 4
AR 049602
DI 10.1103/PhysRevLett.101.049602
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 337HV
UT WOS:000258427100063
ER

PT J
AU Shi, M
   Chang, J
   Pailhes, S
   Norman, MR
   Campuzano, JC
   Mansson, M
   Claesson, T
   Tjernberg, O
   Bendounan, A
   Patthey, L
   Momono, N
   Oda, M
   Ido, M
   Mudry, C
   Mesot, J
AF Shi, M.
   Chang, J.
   Pailhes, S.
   Norman, M. R.
   Campuzano, J. C.
   Mansson, M.
   Claesson, T.
   Tjernberg, O.
   Bendounan, A.
   Patthey, L.
   Momono, N.
   Oda, M.
   Ido, M.
   Mudry, C.
   Mesot, J.
TI Coherent d-wave superconducting gap in underdoped La(2-x)Sr(x)CuO(4) by
   angle-resolved photoemission spectroscopy
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID HIGH-T-C; NORMAL-STATE; PSEUDOGAP
AB We present angle-resolved photoemission spectroscopy data on moderately underdoped La(1.855)Sr(0.145)CuO(4) at temperatures below and above the superconducting transition temperature. Unlike previous studies of this material, we observe sharp spectral peaks along the entire underlying Fermi surface in the superconducting state. These peaks trace out an energy gap that follows a simple d-wave form, with a maximum superconducting gap of 14 meV. Our results are consistent with a single gap picture for the cuprates. Furthermore our data on the even more underdoped sample La(1.895)Sr(0.105)CuO(4) also show sharp spectral peaks, even at the antinode, with a maximum superconducting gap of 26 meV.
C1 [Shi, M.; Chang, J.; Pailhes, S.; Bendounan, A.; Patthey, L.; Mudry, C.; Mesot, J.] Paul Scherrer Inst, Condensed Matter Theory Grp, CH-5232 Villigen, Switzerland.
   [Chang, J.; Pailhes, S.; Bendounan, A.; Mesot, J.] ETH, Neutron Scattering Lab, CH-5232 Villigen, Switzerland.
   [Norman, M. R.; Campuzano, J. C.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
   [Campuzano, J. C.] Univ Illinois, Dept Phys, Chicago, IL 60607 USA.
   [Mansson, M.; Claesson, T.; Tjernberg, O.] Royal Inst Technol KTH, S-16440 Kista, Sweden.
   [Momono, N.; Oda, M.; Ido, M.] Hokkaido Univ, Dept Phys, Sapporo, Hokkaido 0600810, Japan.
RP Shi, M (reprint author), Paul Scherrer Inst, Condensed Matter Theory Grp, CH-5232 Villigen, Switzerland.
RI Norman, Michael/C-3644-2013; Mansson, Martin/C-1134-2014; Chang,
   Johan/F-1506-2014; Mudry, Christopher/M-5587-2014; 
OI Mansson, Martin/0000-0002-3086-9642; Chang, Johan/0000-0002-4655-1516;
   Mudry, Christopher/0000-0003-4074-6758; Tjernberg,
   Oscar/0000-0001-8669-6886
NR 21
TC 62
Z9 63
U1 1
U2 18
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 25
PY 2008
VL 101
IS 4
AR 047002
DI 10.1103/PhysRevLett.101.047002
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 337HV
UT WOS:000258427100049
PM 18764357
ER

PT J
AU Tartakovsky, AM
   Tartakovsky, DM
   Meakin, P
AF Tartakovsky, Alexandre M.
   Tartakovsky, Daniel M.
   Meakin, Paul
TI Stochastic Langevin model for flow and transport in porous media
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SMOOTHED PARTICLE HYDRODYNAMICS; BIODEGRADATION; DISPERSION
AB We present a new model for fluid flow and solute transport in porous media, which employs smoothed particle hydrodynamics to solve a Langevin equation for flow and dispersion in porous media. This allows for effective separation of the advective and diffusive mixing mechanisms, which is absent in the classical dispersion theory that lumps both types of mixing into dispersion coefficient. The classical dispersion theory overestimates both mixing-induced effective reaction rates and the effective fractal dimension of the mixing fronts associated with miscible fluid Rayleigh-Taylor instabilities. We demonstrate that the stochastic (Langevin equation) model overcomes these deficiencies.
C1 [Tartakovsky, Alexandre M.] Pacific NW Natl Lab, Richland, WA 99352 USA.
   [Tartakovsky, Daniel M.] Univ Calif San Diego, La Jolla, CA 92093 USA.
   [Meakin, Paul] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Tartakovsky, AM (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM alexandre.tartakovsky@pnl.gov; dmt@ucsd.edu; paul.meakin@inl.gov
RI Tartakovsky, Daniel/E-7694-2013
FU Advanced Scientific Computing Research Program; Envonmental Management
   Science Program of the U. S. Department of Energy Office of Science; U.
   S. Department of Energy [DE-AC05-76RL01830]
FX This work was supported by the Advanced Scientific Computing Research
   Program and the Envonmental Management Science Program of the U. S.
   Department of Energy Office of Science. The Pacific Northwest National
   Laboratory is operated for the U. S. Department of Energy by Battelle
   under Contract No. DE-AC05-76RL01830.
NR 12
TC 52
Z9 53
U1 0
U2 17
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 25
PY 2008
VL 101
IS 4
AR 044502
DI 10.1103/PhysRevLett.101.044502
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 337HV
UT WOS:000258427100025
PM 18764333
ER

PT J
AU Tokar, RL
   Wilson, RJ
   Johnson, RE
   Henderson, MG
   Thomsen, MF
   Cowee, MM
   Sittler, EC
   Young, DT
   Crary, FJ
   McAndrews, HJ
   Smith, HT
AF Tokar, R. L.
   Wilson, R. J.
   Johnson, R. E.
   Henderson, M. G.
   Thomsen, M. F.
   Cowee, M. M.
   Sittler, E. C., Jr.
   Young, D. T.
   Crary, F. J.
   McAndrews, H. J.
   Smith, H. T.
TI Cassini detection of water-group pick-up ions in the Enceladus torus
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID MAGNETOSPHERE; PLASMA; ATMOSPHERE; SATURN
AB This study reports direct detection by the Cassini plasma spectrometer of freshly-produced water-group pick-up ions within the proposed Enceladus torus, a radially narrow toroidal region surrounding Saturn that contains a high density of water-group neutrals. This torus is produced by the icy plumes observed near the south pole of Enceladus. The ions are created by charge exchange collisions between water-group neutrals in the Enceladus torus and thermal ions corotating with Saturn. They are identified in the Cassini data via their characteristic ring-like signatures in ion velocity distributions. In the radial distance range of 4.0 to 4.5 R-S, the density of these non-thermalized ions is estimated to be at least 5.2 cm(-3), about 8% of the total ion density. The estimated density together with ionization, charge exchange, and loss times, yield an ion thermalization time of at least 3150 s, in reasonable agreement with hybrid particle simulations.
C1 [Tokar, R. L.; Wilson, R. J.; Henderson, M. G.; Thomsen, M. F.; Cowee, M. M.; McAndrews, H. J.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Young, D. T.; Crary, F. J.] SW Res Inst, San Antonio, TX USA.
   [Johnson, R. E.] Univ Virginia, Charlottesville, VA USA.
   [Sittler, E. C., Jr.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Smith, H. T.] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA.
RP Tokar, RL (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM rlt@lanl.gov
RI Wilson, Rob/C-2689-2009; Smith, Howard/H-4662-2016; Henderson,
   Michael/A-3948-2011
OI Wilson, Rob/0000-0001-9276-2368; Smith, Howard/0000-0003-3537-3360;
   Henderson, Michael/0000-0003-4975-9029
NR 13
TC 37
Z9 37
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
EI 1944-8007
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD JUL 24
PY 2008
VL 35
IS 14
AR L14202
DI 10.1029/2008GL034749
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 331ER
UT WOS:000257996000002
ER

PT J
AU Piccoli, PMB
   Koetzle, TF
   Schultz, AJ
   Zhurova, EA
   Stare, J
   Pinkerton, AA
   Eckert, J
   Hadzi, D
AF Piccoli, Paula M. B.
   Koetzle, Thomas F.
   Schultz, Arthur J.
   Zhurova, Elizabeth A.
   Stare, Jernej
   Pinkerton, A. Alan
   Eckert, Juergen
   Hadzi, Dusan
TI Variable temperature neutron diffraction and X-ray charge density
   studies of tetraacetylethane
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID UREA-PHOSPHORIC ACID; SHORT HYDROGEN-BOND; PARRINELLO
   MOLECULAR-DYNAMICS; SCHRODINGER-EQUATION; ELECTRON-DENSITY; CRYSTAL;
   PROTON; SINGLE; BENZOYLACETONE; MIGRATION
AB Single crystal neutron diffraction data have been collected on a sample of enolized 3,4-diacetyl-2,5-hexanedione (tetraacetylethane, TAE) at five temperatures between 20 and 298 K to characterize the temperature-dependent behavior of the short, strong, intramolecular hydrogen bond. Upon decreasing the temperature from 298 K to 20 K, the O2-H1 distance decreases from 1.171(11) to 1.081(2) angstrom and the O1 center dot center dot center dot H1 distance increases from 1.327(10) to 1.416(6) angstrom. The convergence of the C-O bond lengths from inequivalent distances at low temperature to identical values (1.285(4) angstrom) at 298 K is consistent with a resonance-assisted hydrogen bond. However, a rigid bond analysis indicates that the structure at 298 K is disordered. The disorder vanishes at lower temperatures. Short intermolecular C-H center dot center dot center dot O contacts may be responsible for the ordering at low temperature. The intramolecular O center dot center dot center dot O distance (2.432 +/- 0.006 angstrom) does not change with temperature. X-ray data at 20 K were measured to analyze the charge density and to gain additional insight into the nature of the strong hydrogen bond. Quantum mechanical calculations demonstrate that periodic boundary conditions provide significant enhancement over gas phase models in that superior agreement with the experimental structure is achieved when applying periodicity. One-dimensional potential energy calculations followed by quantum treatment of the proton reproduce the location of the proton nearer to the O2 site reasonably well, although they overestimate the O-H distance at low temperatures. The choice of the single-point energy calculation strategy for the proton potential is justified by the fact that the proton is preferably located nearer to O2 rather than being equally distant to O1 and O2 or evenly distributed (disordered) between them.
C1 [Piccoli, Paula M. B.; Koetzle, Thomas F.; Schultz, Arthur J.] Argonne Natl Lab, Argonne, IL 60439 USA.
   [Zhurova, Elizabeth A.; Pinkerton, A. Alan] Univ Toledo, Dept Chem, Toledo, OH 43606 USA.
   [Stare, Jernej; Hadzi, Dusan] Natl Inst Chem KI, SI-1000 Ljubljana, Slovenia.
   [Eckert, Juergen] Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA.
RP Piccoli, PMB (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM pmbpiccoli@hotmail.com
OI pinkerton, alan/0000-0002-2239-1992
NR 58
TC 17
Z9 17
U1 1
U2 6
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD JUL 24
PY 2008
VL 112
IS 29
BP 6667
EP 6677
DI 10.1021/jp800204r
PG 11
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 327IX
UT WOS:000257723900021
PM 18593102
ER

PT J
AU Liu, SB
   Govind, N
AF Liu, Shubin
   Govind, Niranjan
TI Toward understanding the nature of internal rotation barriers with a new
   energy partition scheme: Ethane and n-butane
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; QUANTUM MOLECULAR-DYNAMICS; HUNDS
   MULTIPLICITY RULE; BOND ORBITAL ANALYSIS; ELECTRON-DENSITY; BASIS-SET;
   STAGGERED CONFORMATION; ELECTROPHILICITY INDEX; REACTIVITY INDEXES;
   FISHER INFORMATION
AB On the basis of an alternative energy partition scheme where density-based quantification of the steric effect was proposed [Liu, S. B. J. Chem. Phys. 2007, 126, 2441031, the origin of the internal rotation barrier between the eclipsed and staggered conformers of ethane and n-butane is systematically investigated in this work. Within the new scheme, the total electronic energy is decomposed into three independent components, steric, electrostatic, and fermionic quantum. The steric energy defined in this way is repulsive, exclusive, and extensive and intrinsically linked to Bader's atoms in molecules approach. Two kinds of differences, adiabatic (with optimal structure) and vertical (with fixed geometry), are considered for the molecules in this work. We find that in the adiabatic case the eclipsed conformer possesses a larger steric repulsion than the staggered conformer for both molecules, but in the vertical cases the staggered conformer retains a larger steric repulsion. For ethane, a linear relationship between the total energy difference and the fermionic quantum energy difference is discovered. This linear relationship, however, does not hold for n-butane, whose behaviors in energy component differences are found to be more complicated. The impact of basis set and density functional choices on energy components from the new energy partition scheme has been investigated, as has its comparison with another definition of the steric effect in the literature in terms of the natural bond orbital analysis through the Pauli Exclusion Principle. In addition, profiles of conceptual density functional theory reactivity indices as a function of dihedral angle changes have been examined. Put together, these results suggest that the new energy partition scheme provides insights from a different perspective of internal rotation barriers.
C1 [Liu, Shubin] Univ N Carolina, Renaissance Comp Inst, Chapel Hill, NC 27599 USA.
   [Govind, Niranjan] Pacific NW Natl Lab, William R Wiley Environm Mol Sci Lab, Richland, WA 99352 USA.
RP Liu, SB (reprint author), Univ N Carolina, Renaissance Comp Inst, Chapel Hill, NC 27599 USA.
RI Liu, Shubin/B-1502-2009; Govind, Niranjan/D-1368-2011
OI Liu, Shubin/0000-0001-9331-0427; 
NR 82
TC 65
Z9 66
U1 2
U2 12
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD JUL 24
PY 2008
VL 112
IS 29
BP 6690
EP 6699
DI 10.1021/jp800376a
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 327IX
UT WOS:000257723900023
PM 18563887
ER

PT J
AU Hou, CH
   Wang, XQ
   Liang, CD
   Yiacoumi, S
   Tsouris, C
   Dai, S
AF Hou, Chia-Hung
   Wang, Xiqing
   Liang, Chengdu
   Yiacoumi, Sotira
   Tsouris, Costas
   Dai, Sheng
TI Molecular-sieving capabilities of mesoporous carbon membranes
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID DOUBLE-LAYER CAPACITORS; GOLD NANOTUBULE MEMBRANES; ELECTRICAL
   DOUBLE-LAYER; ION SIZE; ELECTROSORPTION CAPACITANCE; ACTIVATED CARBONS;
   PORE STRUCTURE; ELECTRODES; NANOCOMPOSITE; PERFORMANCE
AB The size-sieving properties of a mesoporous carbon membrane were studied via molecular permeation and cyclic voltammetry experiments. Two phenomena, simple diffusion and electrochemically aided diffusion, were investigated. Molecular diffusion through the membrane was caused by a concentration gradient across the membrane and was facilitated by electrosorption of ions under an externally applied electric field. The diffusion of molecules transported through the membrane was characterized by the values of permeability and apparent diffusion coefficient in the membrane. Because larger molecules are more restricted in terms of penetrating the pores, the size-based selectivity of the mesoporous carbon membrane could be readily observed. For example, in the two-component permeation experiment, a high selectivity (alpha = 56.9) of anilinium over Rhodamine B was found. It is inferred that the diffusive transport of the larger Rhodamine B molecules with a more extensive retardation comes from the competitive mechanism between the two kinds of molecules in accessing the pore. A series of voltammetric experiments involving a mesoporous carbon membrane immersed in various electrolytes with ions of different sizes allowed the observation of ion-exclusion phenomena. It was found that the size effect is significant for electrochemically aided diffusion and electrosorption processes. The number of cations inside the pores of the membrane decreases with increasing cation size. This phenomenon is due to the size-exclusion effect, which could be demonstrated by the values of electrical double-layer capacitance for sodium, magnesium, and tetrahexylammonium cations, at potentials ranging from negative values to the point of zero charge, corresponding to 86.7, 73.1, and 50.0 F/g, respectively. The findings of this work manifest that the relationship between the pore size and the dimensions of the molecules determines the transport and sorption behavior of nanoporous carbon materials.
C1 [Hou, Chia-Hung; Wang, Xiqing; Liang, Chengdu; Dai, Sheng] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
   [Hou, Chia-Hung; Yiacoumi, Sotira] Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA.
   [Tsouris, Costas] Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Dai, S (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM dais@ornl.gov
RI Wang, Xiqing/E-3062-2010; Liang, Chengdu/G-5685-2013; Hou,
   Chia-Hung/J-4350-2013; Tsouris, Costas/C-2544-2016; Dai,
   Sheng/K-8411-2015
OI Wang, Xiqing/0000-0002-1843-008X; Hou, Chia-Hung/0000-0001-5149-4096;
   Tsouris, Costas/0000-0002-0522-1027; Dai, Sheng/0000-0002-8046-3931
NR 47
TC 20
Z9 20
U1 4
U2 36
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD JUL 24
PY 2008
VL 112
IS 29
BP 8563
EP 8570
DI 10.1021/jp8006427
PG 8
WC Chemistry, Physical
SC Chemistry
GA 327IY
UT WOS:000257724000022
PM 18590324
ER

PT J
AU Epling, WS
   Peden, CHF
   Szanyi, J
AF Epling, William S.
   Peden, Charles H. F.
   Szanyi, Janos
TI Carbonate formation and stability on a Pt/BaO/(gamma)-Al2O3 NOX
   storage/reduction catalyst
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID STORAGE-REDUCTION; FT-IR; 3-WAY CATALYST; STORED NOX; CO2; BAO/AL2O3;
   DIOXIDE; RELEASE; OXIDES; WATER
AB There has been recent debate regarding the role or influence of BaCO3 species on the performance or operation of Pt/BaO/Al2O3 model NOX storage/reduction (NSR) catalysts. This influence is primarily regarded as negative, but the extent of its impact is not clear. For this reason, the formation and stability of barium carbonate species on a Pt/BaO/Al2O3 model NSR catalyst were characterized using Fourier transform infrared (FTIR) spectroscopy. The catalyst sample was exposed to CO2, CO, and CO + O-2 at various temperatures, from 300 to >500 K. Bidentate carbonate species readily form under all conditions, while at higher temperatures, unidentate species were also observed and likely formed from bidentate species as a result of a change in their coordination to the oxide surface. Reaction of COX species with residual hydroxide species on the catalyst led to the formation of bicarbonates, and when the sample was exposed to CO at low temperature, formate species were also formed. These formate species decomposed at elevated temperatures and contributed to the formation of carbonates. H2O exposure resulted in the agglomeration of various COX-containing phases to larger particles.
C1 Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada.
   Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA.
RP Epling, WS (reprint author), Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada.
EM wepling@chemengmail.waterloo.ca
OI Peden, Charles/0000-0001-6754-9928
NR 43
TC 31
Z9 32
U1 2
U2 19
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD JUL 24
PY 2008
VL 112
IS 29
BP 10952
EP 10959
DI 10.1021/jp712180q
PG 8
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 327IZ
UT WOS:000257724100053
ER

PT J
AU Dupuis, M
   Karataglidis, S
   Bauge, E
   Delaroche, JP
   Gogny, D
AF Dupuis, M.
   Karataglidis, S.
   Bauge, E.
   Delaroche, J. -P.
   Gogny, D.
TI Challenging nuclear structure models through a microscopic description
   of proton inelastic scattering off Pb-208
SO PHYSICS LETTERS B
LA English
DT Article
ID PARITY LEVELS; EXCITATION; STATES; STRENGTH
AB Differential cross sections from fully microscopic calculations of inelastic proton scattering off Pb-208 are compared to experimental scattering data for incident proton energies between 65 and 201 MeV. The required nucleon-nucleus interactions were formed by folding nuclear structure information with a reliable nucleon-nucleon effective interaction that has no adjustable parameter. The absence of phenomenological normalisation in our approach offers the possibility to interpret with confidence the calculated results in terms of the quality of the underlying nuclear structure description: a feature that until recently, to the electron probe. We have used this method to investigate the had been reserved, effect of long range correlations embedded in excited states on calculated inelastic observables and demonstrate the sensitivity of nucleon scattering predictions to details of the nuclear structure. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Dupuis, M.; Karataglidis, S.; Bauge, E.; Delaroche, J. -P.] Commissariat Energie Atom, Ctr DAM Ile France, Serv Phys Nucl, F-91297 Bruyeres Le Chatel, Arpajon, France.
   [Gogny, D.] Lawrence Livermore Natl Lab, Livermore, CA USA.
RP Bauge, E (reprint author), Commissariat Energie Atom, Ctr DAM Ile France, Serv Phys Nucl, F-91297 Bruyeres Le Chatel, Arpajon, France.
EM eric.bauge@cea.fr
NR 26
TC 11
Z9 11
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD JUL 24
PY 2008
VL 665
IS 4
BP 152
EP 156
DI 10.1016/j.phystetb.2008.05.061
PG 5
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 334GR
UT WOS:000258210800007
ER

PT J
AU Stetcu, I
   Liu, CP
   Friar, JL
   Hayes, AC
   Navratil, P
AF Stetcu, I.
   Liu, C. -P.
   Friar, J. L.
   Hayes, A. C.
   Navratil, P.
TI Nuclear electric dipole moment of He-3
SO PHYSICS LETTERS B
LA English
DT Article
DE time-reversal and parity violation; nucleon-nucleon interactions;
   electric dipole moments
ID EFFECTIVE-FIELD THEORY; ION STORAGE-RINGS; NEUTRON; FORCES
AB A permanent electric dipole moment (EDM) of a physical system requires time-reversal (T) and parity (P) violation. Experimental programs are currently pushing the limits on EDMs in atoms, nuclei, and the neutron to regimes of fundamental theoretical interest. Here we calculate the magnitude of the P-, T-violating EDM of He-3 and the expected sensitivity of such a measurement to the underlying P, T-violating interactions. Assuming that the coupling constants are of comparable magnitude for pi-, rho-, and omega-exchanges, we find that the pion-exchange contribution dominates. Our results suggest that a measurement of the He-3 EDM is complementary to the planned neutron and deuteron experiments, and could provide a powerful constraint for the theoretical models of the pion-nucleon P-, T-violating interaction. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Stetcu, I.; Liu, C. -P.; Friar, J. L.; Hayes, A. C.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   [Liu, C. -P.] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
   [Liu, C. -P.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
   [Navratil, P.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Stetcu, I (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM istet@lanl.gov
NR 46
TC 33
Z9 33
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD JUL 24
PY 2008
VL 665
IS 4
BP 168
EP 172
DI 10.1016/j.physletb.2008.06.019
PG 5
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 334GR
UT WOS:000258210800010
ER

PT J
AU Aoki, S
   Chiu, TW
   Fukaya, H
   Hashimoto, S
   Hsieh, TH
   Kaneko, T
   Matsufuru, H
   Noaki, J
   Ogawa, K
   Onogi, T
   Yamada, N
AF Aoki, S.
   Chiu, T. W.
   Fukaya, H.
   Hashimoto, S.
   Hsieh, T. H.
   Kaneko, T.
   Matsufuru, H.
   Noaki, J.
   Ogawa, K.
   Onogi, T.
   Yamada, N.
TI Topological susceptibility in two-flavor lattice QCD with exact chiral
   symmetry
SO PHYSICS LETTERS B
LA English
DT Article
AB We determine the topological susceptibility X(t) in two-flavor QCD using the lattice simulations at a fixed topological sector. The topological charge density is unambiguously defined on the lattice using the overlap-Dirac operator which possesses exact chiral symmetry. Simulations are performed on a 163 x 32 lattice at lattice spacing similar to 0.12 fm at six sea quark masses m(q) ranging in m(s)/6 - m(s) with m(s) the physical strange quark mass. The Xt is extracted from the constant behavior of the time-correlation of flavor-singlet pseudo-scalar meson two-point function at large distances, which arises from the finite size effect due to the fixed topology. In the Small m(q) regime, our result of Xt is proportional to m(q) as expected from chiral effective theory. Using the formula X(t) = m(q) Sigma/N(f) by Leutwyler-Smilga, we obtain the chiral condensate in N(f) = 2 QCD as Sigma(MS) over bar (2 GeV) = [252(5)(10) MeV](3), in good agreement with our previous result obtained in the c-regime. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Chiu, T. W.; Ogawa, K.] Natl Taiwan Univ, Ctr Theoret Sci, Dept Phys, Taipei 10617, Taiwan.
   [Chiu, T. W.; Ogawa, K.] Natl Taiwan Univ, Natl Ctr Theoret Sci, Taipei 10617, Taiwan.
   [Aoki, S.] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan.
   [Aoki, S.] Brookhaven Natl Lab, Riken BNL Res Ctr, Upton, NY 11973 USA.
   [Fukaya, H.] RIKEN, Theoret Phys Lab, Wako, Saitama 3510198, Japan.
   [Hashimoto, S.; Kaneko, T.; Matsufuru, H.; Noaki, J.; Yamada, N.] High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan.
   [Hashimoto, S.; Kaneko, T.; Yamada, N.] Grad Univ Adv Studies Sokendai, Sch High Energy Accelerator Sci, Tsukuba, Ibaraki 3050801, Japan.
   [Hsieh, T. H.] Acad Sinica, Res Ctr Appl Sci, Taipei 115, Taiwan.
   [Onogi, T.] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan.
RP Chiu, TW (reprint author), Natl Taiwan Univ, Ctr Theoret Sci, Dept Phys, Taipei 10617, Taiwan.
EM twchiu@phys.ntu.edu.tw
RI Hsieh, Tung-Han/E-1740-2011; 
OI Chiu, Ting-Wai/0000-0002-7371-1132
NR 39
TC 31
Z9 31
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD JUL 24
PY 2008
VL 665
IS 4
BP 294
EP 297
DI 10.1016/j.physletb.2008.06.039
PG 4
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 334GR
UT WOS:000258210800033
ER

PT J
AU Sicard-Piet, A
   Bourdarie, S
   Boscher, D
   Friedel, RHW
   Thomsen, M
   Goka, T
   Matsumoto, H
   Koshiishi, H
AF Sicard-Piet, A.
   Bourdarie, S.
   Boscher, D.
   Friedel, R. H. W.
   Thomsen, M.
   Goka, T.
   Matsumoto, H.
   Koshiishi, H.
TI A new international geostationary electron model: IGE-2006, from 1 keV
   to 5.2 MeV
SO SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS
LA English
DT Article
ID MAGNETOSPHERIC PLASMA ANALYZER; GEOSYNCHRONOUS ORBIT
AB Department Environnement Spatial, Office National d'Etudes et de Recherches Ae ' rospatiales (ONERA) has been developing a model for the geostationary electron environment since 2003. Until now, this model was called Particle ONERA- LANL Environment ( POLE), and it is valid from 30 keV up to 5.2MeV. POLE is based on the full complement of Los Alamos National Laboratory geostationary satellites, covers the period 1976-- 2005, and takes into account the solar cycle variation. Over the period 1976 to present, four different detectors were flown: charged particle analyzer ( CPA), synchronous orbit particle analyzer ( SOPA), energetic spectra for particles ( ESP), and magnetospheric plasma analyzer ( MPA). Only the first three were used to develop the POLE model. Here we extend the energy coverage of the model to low energies using MPA measurements. We further include the data from the Japanese geostationary spacecraft, Data Relay Test Satellite ( DRTS). These data are now combined into an extended geostationary electron model which we call IGE- 2006.
C1 [Sicard-Piet, A.; Bourdarie, S.; Boscher, D.] Off Natl Etud & Rech Aerosp, Dept Environm Spatial, F-31400 Toulouse, France.
   [Friedel, R. H. W.; Thomsen, M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Goka, T.; Matsumoto, H.; Koshiishi, H.] Japan Aerosp Explorat Agcy, Tsukuba, Ibaraki 3058505, Japan.
RP Sicard-Piet, A (reprint author), Off Natl Etud & Rech Aerosp, Dept Environm Spatial, F-31400 Toulouse, France.
EM angelica.sicard@onera.fr; sebastien.bourdarie@onera.fr;
   daniel.boscher@onera.fr; friedel@lanl.gov; mthomsen@lanl.gov;
   goka.tateo@jaxa.jp; matsumoto.haruhisa@jaxa.jp; koshiishi.hideki@jaxa.jp
RI Friedel, Reiner/D-1410-2012
OI Friedel, Reiner/0000-0002-5228-0281
NR 15
TC 17
Z9 18
U1 0
U2 3
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 1542-7390
J9 SPACE WEATHER
JI Space Weather
PD JUL 24
PY 2008
VL 6
IS 7
AR S07003
DI 10.1029/2007SW000368
PG 13
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
   Atmospheric Sciences
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
   Atmospheric Sciences
GA 331HE
UT WOS:000258002500001
ER

PT J
AU Pincus, R
   Batstone, CP
   Hofmann, RJP
   Taylor, KE
   Glecker, PJ
AF Pincus, Robert
   Batstone, Crispian P.
   Hofmann, Robert J. Patrick
   Taylor, Karl E.
   Glecker, Peter J.
TI Evaluating the present-day simulation of clouds, precipitation, and
   radiation in climate models
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID NUMERICAL WEATHER PREDICTION
AB This paper describes a set of metrics for evaluating the simulation of clouds, radiation, and precipitation in the present-day climate. As with the skill scores used to measure the accuracy of short-term weather forecasts, these metrics are low-order statistical measures of agreement with relevant, well-observed physical quantities. The metrics encompass five statistical summaries computed for five physical quantities (longwave, shortwave, and net cloud radiative effect, projected cloud fraction, and surface precipitation rate) over the global climatological annual cycle. Agreement is measured against two independent observational data sets. The metrics are computed for the models that participated in the Coupled Model Intercomparison Project phase 3, which formed the basis for the Fourth Assessment of the IPCC. Model skill does not depend strongly on the data set used for verification, indicating that observational uncertainty does not limit the ability to assess model simulations of these fields. No individual model excels in all scores though the "IPCC mean model,'' constructed by averaging the fields produced by all the CMIP models, performs particularly well across the board. This skill is due primarily to the individual model errors being distributed on both sides of the observations, and to a lesser degree to the models having greater skill at simulating largescale features than those near the grid scale. No measure of model skill considered here is a good predictor of the strength of cloud feedbacks under climate change. The model climatologies, observational data sets, and metric scores are available on-line.
C1 [Pincus, Robert; Batstone, Crispian P.; Hofmann, Robert J. Patrick] Univ Colorado, NOAA, Earth System Res Lab, Cooperat Inst Res Environm Sci,Div Phys Sci, Boulder, CO 80305 USA.
   [Taylor, Karl E.; Glecker, Peter J.] PCMDI, Livermore, CA 94551 USA.
   [Taylor, Karl E.; Glecker, Peter J.] Lawrence Livermore Natl Lab, Div Atmospher Sci, Livermore, CA USA.
RP Pincus, R (reprint author), Univ Colorado, NOAA, Earth System Res Lab, Cooperat Inst Res Environm Sci,Div Phys Sci, 325 Broadway, Boulder, CO 80305 USA.
EM robert.pincus@colorado.edu
RI Taylor, Karl/F-7290-2011; Gleckler, Peter/H-4762-2012; Pincus,
   Robert/B-1723-2013; Batstone, Crispian/D-8180-2015
OI Taylor, Karl/0000-0002-6491-2135; Gleckler, Peter/0000-0003-2816-6224;
   Pincus, Robert/0000-0002-0016-3470; Batstone,
   Crispian/0000-0002-1056-5254
NR 16
TC 68
Z9 70
U1 1
U2 13
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD JUL 23
PY 2008
VL 113
IS D14
AR D14209
DI 10.1029/2007JD009334
PG 10
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 331FE
UT WOS:000257997300001
ER

PT J
AU Bernholc, J
   Hodak, M
   Lu, WC
AF Bernholc, J.
   Hodak, Miroslav
   Lu, Wenchang
TI Recent developments and applications of the real-space multigrid method
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article; Proceedings Paper
CT CECAM Workshop on Linear-Scaling AB Initio Calculation - Applications
   and Future Directions
CY SEP 03-06, 2007
CL Lyon, FRANCE
ID ELECTRONIC-STRUCTURE CALCULATIONS; DENSITY-FUNCTIONAL THEORY;
   MOLECULAR-DYNAMICS; SYSTEM-SIZE; AB-INITIO; SCALING ALGORITHM; 1ST
   PRINCIPLES; PRION PROTEIN; MATRIX METHOD; WATER
AB The salient features of the real-space multigrid method and its recent applications are described. This method is suitable for very large scale, massively parallel calculations of atomic and electronic structure, as well as quantum molecular dynamics. Its nearly O(N) implementation provides a compact, variationally optimized basis that is also very useful for fully O(N) calculations of quantum transport. Recently, we also developed a hybrid method for simulating biomolecules in solution, in which most of the solvent is inexpensively treated using an approximate density-functional method, while the biomolecule and its first solvation shells are described at the full Kohn -Sham level. Our calculations show excellent parallel efficiency and scaling on massively parallel supercomputers.
C1 [Bernholc, J.; Hodak, Miroslav; Lu, Wenchang] N Carolina State Univ, Ctr High Performance Simulat, Raleigh, NC 27695 USA.
   [Bernholc, J.; Hodak, Miroslav; Lu, Wenchang] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA.
   [Bernholc, J.; Lu, Wenchang] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
RP Bernholc, J (reprint author), N Carolina State Univ, Ctr High Performance Simulat, Raleigh, NC 27695 USA.
NR 61
TC 8
Z9 8
U1 0
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
EI 1361-648X
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD JUL 23
PY 2008
VL 20
IS 29
AR 294205
DI 10.1088/0953-8984/20/29/294205
PG 8
WC Physics, Condensed Matter
SC Physics
GA 321SD
UT WOS:000257325900010
ER

PT J
AU Bowler, DR
   Fattebert, JL
   Gillan, MJ
   Haynes, PD
   Skylaris, CK
AF Bowler, D. R.
   Fattebert, J-L
   Gillan, M. J.
   Haynes, P. D.
   Skylaris, C-K
TI Introductory remarks: Linear scaling methods - Preface
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Editorial Material
C1 [Bowler, D. R.; Gillan, M. J.] UCL, Mat Simulat Lab, London, England.
   [Fattebert, J-L] Lawrence Livermore Natl Lab, Livermore, CA USA.
   [Haynes, P. D.] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
   [Skylaris, C-K] Univ Southampton, Southampton SO9 5NH, Hants, England.
RP Bowler, DR (reprint author), UCL, Mat Simulat Lab, London, England.
RI Bowler, David/C-1515-2008
OI Bowler, David/0000-0001-7853-1520
NR 3
TC 21
Z9 21
U1 1
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD JUL 23
PY 2008
VL 20
IS 29
AR 290301
DI 10.1088/0953-8984/20/29/290301
PG 3
WC Physics, Condensed Matter
SC Physics
GA 321SD
UT WOS:000257325900001
ER

PT J
AU Fattebert, JL
AF Fattebert, J-L
TI Adaptive localization regions for O(N) density functional theory
   calculations
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article; Proceedings Paper
CT CECAM Workshop on Linear-Scaling AB Initio Calculation - Applications
   and Future Directions
CY SEP 03-06, 2007
CL Lyon, FRANCE
ID ELECTRONIC-STRUCTURE CALCULATIONS; FINITE-ELEMENT-METHOD; WANNIER
   FUNCTIONS
AB A linear scaling approach for general and accurate pseudopotential density functional theory calculations is presented. It is based on a finite difference discretization. Effective O(N) scaling is achieved by confining the orbitals in spherical localization regions. To improve accuracy and flexibility while computing the smallest possible number of orbitals, we propose an algorithm for adapting localization regions during computation. Numerical results for a polyacetylene chain and a magnesium oxide ring are presented.
C1 Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94551 USA.
RP Fattebert, JL (reprint author), Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94551 USA.
EM fattebert1@llnl.gov
NR 21
TC 4
Z9 4
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
EI 1361-648X
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD JUL 23
PY 2008
VL 20
IS 29
AR 294210
DI 10.1088/0953-8984/20/29/294210
PG 6
WC Physics, Condensed Matter
SC Physics
GA 321SD
UT WOS:000257325900015
ER

PT J
AU Subotnik, JE
   Head-Gordon, M
AF Subotnik, Joseph E.
   Head-Gordon, Martin
TI Exploring the accuracy of relative molecular energies with local
   correlation theory
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article; Proceedings Paper
CT CECAM Workshop on Linear-Scaling AB Initio Calculation - Applications
   and Future Directions
CY SEP 03-06, 2007
CL Lyon, FRANCE
ID ELECTRON CORRELATION METHODS; PLESSET PERTURBATION-THEORY; DENSITY
   FITTING APPROXIMATIONS; COUPLED-CLUSTER THEORY; DIELS-ALDER REACTIONS;
   TRIPLES CORRECTION T; FUNCTIONAL THEORY; CONFORMATIONAL ENERGIES;
   VIBRATIONAL FREQUENCIES; SYSTEMS
AB Local coupled-cluster singles-doubles theory (LCCSD) is a theorist's attempt to capture electron-electron correlation in a fast amount of time and with chemical accuracy. Many of the difficult computational hurdles have been navigated over the last twenty years, including how to construct a linear scaling algorithm and how to produce smooth potential energy surfaces. Nevertheless, there remains the question of just how accurate a local correlation model can be, and what are the chemical limits within which local models are largely applicable. Here, we investigate how accurately can LCCSD approximate full CCSD for cases of atomization energies, isomerization energies, conformational energies, barrier heights and electron affinities. Our conclusion is that LCCSD computes relative energies that are correct to within 1-2 kcal mol(-1) of the CCSD energy using relatively aggressive cutoffs and over a broad range of different molecular environments -alkane isomers, dipeptide conformations, Diels-Alder transition states and electron attachment in charge delocalized systems. These findings should push the reach of local correlation applications into new research terrain, including molecules on metal cluster surfaces or perhaps even metal-molecule -metal clusters.
C1 [Subotnik, Joseph E.] Tel Aviv Univ, Sch Chem, IL-69978 Tel Aviv, Israel.
   [Head-Gordon, Martin] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Head-Gordon, Martin] Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Subotnik, JE (reprint author), Tel Aviv Univ, Sch Chem, IL-69978 Tel Aviv, Israel.
EM subotnik@post.harvard.edu; mhg@bastille.cchem.berkeley.edu
NR 52
TC 9
Z9 9
U1 0
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
EI 1361-648X
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD JUL 23
PY 2008
VL 20
IS 29
AR 294211
DI 10.1088/0953-8984/20/29/294211
PG 13
WC Physics, Condensed Matter
SC Physics
GA 321SD
UT WOS:000257325900016
ER

PT J
AU Trimarchi, G
   Zunger, A
AF Trimarchi, Giancarlo
   Zunger, Alex
TI Finding the lowest-energy crystal structure starting from randomly
   selected lattice vectors and atomic positions: first-principles
   evolutionary study of the Au-Pd, Cd-Pt, Al-Sc, Cu-Pd, Pd-Ti, and Ir-N
   binary systems
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID MOLECULAR-DYNAMICS; PHASE-DIAGRAMS; PREDICTION; PRESSURE; METALS
AB Two types of global space-group optimization (GSGO) problems can be recognized in binary metallic alloys A(q)B(1-q): (i) configuration search problems, where the underlying crystal lattice is known and the aim is finding the most favorable decoration of the lattice by A and B atoms and (ii) lattice-type search problems, where neither the lattice type nor the decorations are given and the aim is finding energetically favorable lattice vectors and atomic occupations. Here, we address the second, lattice-type search problem in binary A(q)B(1-q) metallic alloys, where the constituent solids A and B have different lattice types. We tackle this GSGO problem using an evolutionary algorithm, where a set of crystal structures with randomly selected lattice vectors and site occupations is evolved through a sequence of generations in which a given number of structures of highest LDA energy are replaced by new ones obtained by the generational operations of mutation or mating. Each new structure is locally relaxed to the nearest total-energy minimum by using the ab initio atomic forces and stresses. We applied this first-principles evolutionary GSGO scheme to metallic alloy systems where the nature of the intermediate A-B compounds is difficult to guess either because pure A and pure B have different lattice types and the ( i) intermediate compound has the structure of one end-point (Al3Sc, AlSc3, CdPt3), or (ii) none of them (CuPd, AlSc), or (iii) when the intermediate compound has lattice sites belonging simultaneously to a few types (fcc, bcc) (PdTi3). The method found the correct structures, L1(2) type for Al3Sc, D0(19) type for AlSc3, 'CdPt3' type for CdPt3, B2 type for CuPd and AlSc, and A15 type for PdTi3. However, in such stochastic methods, success is not guaranteed, since many independently started evolutionary sequences produce at the end different final structures: one has to select the lowest-energy result from a set of such independently started sequences. Interestingly, we also predict a hitherto unknown (P2/m) structure of the hard compound IrN2 with energy lower than all previous predictions.
C1 [Trimarchi, Giancarlo; Zunger, Alex] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Trimarchi, G (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM Alex_Zunger@nrel.gov
RI Zunger, Alex/A-6733-2013; Trimarchi, Giancarlo/A-8225-2010
OI Trimarchi, Giancarlo/0000-0002-0365-3221
NR 46
TC 22
Z9 22
U1 0
U2 32
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
EI 1361-648X
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD JUL 23
PY 2008
VL 20
IS 29
AR 295212
DI 10.1088/0953-8984/20/29/295212
PG 11
WC Physics, Condensed Matter
SC Physics
GA 321SD
UT WOS:000257325900032
ER

PT J
AU Zhao, ZJ
   Meza, J
   Wang, LW
AF Zhao, Zhengji
   Meza, Juan
   Wang, Lin-Wang
TI A divide-and-conquer linear scaling three-dimensional fragment method
   for large scale electronic structure calculations
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article; Proceedings Paper
CT CECAM Workshop on Linear-Scaling AB Initio Calculation - Applications
   and Future Directions
CY SEP 03-06, 2007
CL Lyon, FRANCE
ID DENSITY-FUNCTIONAL THEORY; MOLECULAR-DYNAMICS
AB We present a new linear scaling ab initio total energy electronic structure calculation method based on a divide-and-conquer strategy. This method is simple to implement, easy to parallelize, and produces accurate results when compared with direct ab initio methods. The new method has been tested on nanosystems with up to 15 000 atoms using up to 8000 processors.
C1 Lawrence Berkeley Natl Lab, Computat Res Div, Berkeley, CA 94720 USA.
RP Wang, LW (reprint author), Lawrence Berkeley Natl Lab, Computat Res Div, Berkeley, CA 94720 USA.
EM lwwang@lbl.gov
OI Meza, Juan/0000-0003-4543-0349
NR 16
TC 18
Z9 18
U1 0
U2 12
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
EI 1361-648X
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD JUL 23
PY 2008
VL 20
IS 29
AR 294203
DI 10.1088/0953-8984/20/29/294203
PG 8
WC Physics, Condensed Matter
SC Physics
GA 321SD
UT WOS:000257325900008
ER

PT J
AU Garnett, EC
   Yang, PD
AF Garnett, Erik C.
   Yang, Peidong
TI Silicon nanowire radial p-n junction solar cells
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID ARRAY PHOTOELECTROCHEMICAL CELLS; PERFORMANCE
AB We have demonstrated a low-temperature wafer-scale etching and thin film deposition method for fabricating silicon n-p core-shell nanowire solar cells. Our devices showed efficiencies up to nearly 0.5%, limited primarily by interfacial recombination and high series resistance. Surface passivation and contact optimization will be critical to improve device performance in the future.
C1 [Yang, Peidong] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Yang, PD (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM p_yang@berkeley.edu
RI Garnett, Erik/A-6847-2009; lee, Sang hoon/J-7844-2012
OI Garnett, Erik/0000-0002-9158-8326; 
NR 20
TC 619
Z9 627
U1 33
U2 306
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD JUL 23
PY 2008
VL 130
IS 29
BP 9224
EP +
DI 10.1021/ja8032907
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 328KE
UT WOS:000257796500023
PM 18576622
ER

PT J
AU Calimano, E
   Tilley, TD
AF Calimano, Elisa
   Tilley, T. Don
TI Alkene hydrosilation by a cationic hydrogen-substituted iridium silylene
   complex
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID OXIDATIVE ADDITION; HYDROSILYLATION; REACTIVITY; ACTIVATION; LINKAGE;
   LIGAND; BOND
AB A cationic hydrogen-substituted iridium silylene complex ((PNP)(H)Ir = Si(Mes)H][B(C(6)F(5))(4)] (2) was synthesized via hydride abstraction from the corresponding neutral iridium silyl hydride complex, DFT calculations for 2 indicate that the cationic charge is localized at the silicon center and depict a LUMO with predominant silicon p-orbital character. Notably, complex 2 reacts rapidly with unhindered alkenes at ambient temperatures to afford disubstituted silylene complexes via Si-C bond formation. Complex 2 is also the catalyst for alkene hydrosilation of primary silanes with a high degree of anti-Markovnikov selectivity.
C1 [Tilley, T. Don] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Tilley, TD (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM tdtilley@berkeley.edu
NR 21
TC 56
Z9 56
U1 3
U2 22
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD JUL 23
PY 2008
VL 130
IS 29
BP 9226
EP +
DI 10.1021/ja803332h
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 328KE
UT WOS:000257796500024
PM 18582049
ER

PT J
AU Averkiev, BB
   Zubarev, DY
   Wang, LM
   Huang, W
   Wang, LS
   Boldyrev, AI
AF Averkiev, Boris B.
   Zubarev, Dmitry Yu.
   Wang, Lei-Ming
   Huang, Wei
   Wang, Lai-Sheng
   Boldyrev, Alexander I.
TI Carbon avoids hypercoordination in CB(6)(-), CB(6)(2-), and C(2)B(5)(-)
   planar carbon-boron clusters
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID AB-INITIO; TETRACOORDINATE CARBON; PHOTOELECTRON-SPECTROSCOPY;
   HEXACOORDINATE CARBON; GENETIC-ALGORITHM; MOLECULES; PENTACOORDINATE;
   COMPLEXES; ATOM; CHEMISTRY
AB The structures and bonding of GB(6)(-), C(2)B(5)(-), and CB(6)(2-) are investigated by photoelectron spectroscopy and ab initio calculations. It is shown that the global minimum structures for these systems are distorted heptacyclic structures. The previously reported hexacyclic structures with a hypercoordinate central carbon atom are found to be significantly higher in energy and were not populated under current experimental conditions. The reasons why carbon avoids hypercoordination in these planar carbon-boron clusters are explained through detailed chemical-bonding analyses.
C1 [Averkiev, Boris B.; Zubarev, Dmitry Yu.; Boldyrev, Alexander I.] Utah State Univ, Dept Chem & Biochem, Logan, UT 84322 USA.
   [Wang, Lei-Ming; Huang, Wei; Wang, Lai-Sheng] Washington State Univ, Dept Phys, Richland, WA 99354 USA.
   [Wang, Lei-Ming; Huang, Wei; Wang, Lai-Sheng] Pacific NW Natl Lab, Chem & Mat Sci Div, Richland, WA 99352 USA.
RP Wang, LS (reprint author), Utah State Univ, Dept Chem & Biochem, 0300 Old Main Hill, Logan, UT 84322 USA.
EM ls.wang@pnl.gov; a.i.boldyrev@usu.edu
RI Wang, Leiming/A-3937-2011; Boldyrev, Alexander/C-5940-2009
OI Boldyrev, Alexander/0000-0002-8277-3669
NR 39
TC 81
Z9 81
U1 2
U2 25
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD JUL 23
PY 2008
VL 130
IS 29
BP 9248
EP +
DI 10.1021/ja801211p
PG 4
WC Chemistry, Multidisciplinary
SC Chemistry
GA 328KE
UT WOS:000257796500035
PM 18582042
ER

PT J
AU Lipton, AS
   Heck, RW
   Primak, S
   McNeill, DR
   Wilson, DM
   Ellis, PD
AF Lipton, A. S.
   Heck, R. W.
   Primak, S.
   McNeill, D. R.
   Wilson, D. M., III
   Ellis, P. D.
TI Characterization of Mg2+ binding to the DNA repair protein
   apurinic/apyrimidic endonuclease 1 via solid-state Mg-25 NMR
   spectroscopy
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID HUMAN ABASIC ENDONUCLEASE; MAJOR HUMAN; CRYSTAL-STRUCTURE;
   EXONUCLEASE-III; APE1; SITE; SENSITIVITY; RESOLUTION; RELAXATION;
   SPECIFICITY
AB Apurinic/apyrimidinic endonuclease 1 (APE1), a member of the divalent cation-dependent phosphoesterase superfamily of proteins that retain the conserved four-layered alpha/beta-sandwich structural core, is an essential protein that functions as part of base excision repair to remove mutagenic and cytotoxic abasic sites from DNA. Using low-temperature solid-state Mg-25 NMR spectroscopy and various mutants of APE1, we demonstrate that Mg2+ binds to APE1 and a functional APE1-substrate DNA complex with an overall stoichiometry of one Mg2+ per mole of APE1 as predicted by the X-ray work of Tainer and co-workers (Mol, C. D.; Kuo, C. F.; Thayer, M. M.; Cunningham, R. P.; Tainer, J. A. Nature 1995, 374, 381-386). However, the NMR spectra show that the single Mg2+ site is disordered. We discuss the probable reasons for the disorder at the Mg2+ binding site. The most likely source of this disorder is arrangement of the protein-ligands about the Mg2+ (cis and trans isomers). The existence of these isomers reinforces the notion of the plasticity of the metal binding site within APE1.
C1 [Lipton, A. S.; Heck, R. W.; Primak, S.; Ellis, P. D.] Pacific NW Natl Lab, Biol Sci Directorate, Richland, WA 99352 USA.
   [McNeill, D. R.; Wilson, D. M., III] NIA, Lab Mol Gerontol, GRC, IRP,NIH, Baltimore, MD 21224 USA.
RP Wilson, DM (reprint author), Pacific NW Natl Lab, Biol Sci Directorate, K8-98,902 Battelle Blvd, Richland, WA 99352 USA.
EM paul.ellis@pnl.gov
FU Intramural NIH HHS [Z01 AG000743-06]; NIBIB NIH HHS [R01 EB002050, R01
   EB003893, EB 003893, EB002050]
NR 49
TC 37
Z9 38
U1 0
U2 9
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD JUL 23
PY 2008
VL 130
IS 29
BP 9332
EP 9341
DI 10.1021/ja0776881
PG 10
WC Chemistry, Multidisciplinary
SC Chemistry
GA 328KE
UT WOS:000257796500045
PM 18576638
ER

PT J
AU Claridge, SA
   Mastroianni, AJ
   Au, YB
   Liang, HW
   Micheel, CM
   Frechet, JMJ
   Alivisatos, AP
AF Claridge, Shelley A.
   Mastroianni, Alexander J.
   Au, Yeung B.
   Liang, Huiyang W.
   Micheel, Christine M.
   Frechet, Jean M. J.
   Alivisatos, A. Paul
TI Enzymatic ligation creates discrete multinanoparticle building blocks
   for self-assembly
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID GOLD NANOPARTICLES; DNA; LIGASE; OLIGONUCLEOTIDES; AMPLIFICATION;
   HYBRIDIZATION; SYSTEMS
AB Enzymatic ligation of discrete nanoparticle-DNA conjugates creates nanoparticle dimer and trimer structures in which the nanoparticles are linked by single-stranded DNA, rather than by double-stranded DNA as in previous experiments. Ligation was verified by agarose gel and small-angle X-ray scattering. This capability was utilized in two ways: first, to create a new class of multiparticle building blocks for nanoscale self-assembly and, second, to develop a system that can amplify a population of discrete nanoparticle assemblies.
C1 [Frechet, Jean M. J.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   Div Mat Sci, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Frechet, JMJ (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM frechet@berkeley.edu; alivis@berkeley.edu
RI Alivisatos , Paul /N-8863-2015; 
OI Alivisatos , Paul /0000-0001-6895-9048; Micheel,
   Christine/0000-0002-7744-9039; Frechet, Jean /0000-0001-6419-0163
NR 29
TC 67
Z9 68
U1 4
U2 51
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD JUL 23
PY 2008
VL 130
IS 29
BP 9598
EP 9605
DI 10.1021/ja8026746
PG 8
WC Chemistry, Multidisciplinary
SC Chemistry
GA 328KE
UT WOS:000257796500076
PM 18588300
ER

PT J
AU Tatebayashi, J
   Liang, BL
   Laghumavarapu, RB
   Bussian, DA
   Htoon, H
   Klimov, V
   Balakrishnan, G
   Dawson, LR
   Huffaker, DL
AF Tatebayashi, J.
   Liang, B. L.
   Laghumavarapu, R. B.
   Bussian, D. A.
   Htoon, H.
   Klimov, V.
   Balakrishnan, G.
   Dawson, L. R.
   Huffaker, D. L.
TI Time-resolved photoluminescence of type-II Ga(As) Sb/GaAs quantum dots
   embedded in an InGaAs quantum well
SO NANOTECHNOLOGY
LA English
DT Article
ID RADIATIVE RECOMBINATION; RELAXATION
AB Optical properties and carrier dynamics in type-II Ga(As) Sb/GaAs quantum dots (QDs) embedded in an InGaAs quantum well (QW) are reported. A large blueshift of the photoluminescence (PL) peak is observed with increased excitation densities. This blueshift is due to the Coulomb interaction between physically separated electrons and holes characteristic of the type-II band alignment, along with a band-filling effect of electrons in the QW. Low-temperature ( 4 K) time-resolved PL measurements show a decay time of similar or equal to 40-70 ns from the transition between Ga( As)Sb QDs and InGaAs QW which is longer than that of the transition between Ga( As) Sb QDs and GaAs two-dimensional electron gas (similar or equal to 30 ns).
C1 [Tatebayashi, J.; Liang, B. L.; Balakrishnan, G.; Huffaker, D. L.] Univ Calif Los Angeles, Elect Engn & Calif Nanosyst Inst, Los Angeles, CA 90095 USA.
   [Laghumavarapu, R. B.; Dawson, L. R.; Huffaker, D. L.] Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM 87106 USA.
   [Bussian, D. A.; Htoon, H.; Klimov, V.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Tatebayashi, J (reprint author), Univ Calif Los Angeles, Elect Engn & Calif Nanosyst Inst, 420 Westwood Plaza, Los Angeles, CA 90095 USA.
EM tatebaya@ee.ucla.edu; huffaker@ee.ucla.edu
RI balakrishnan, ganesh/F-7587-2011; 
OI Klimov, Victor/0000-0003-1158-3179; Htoon, Han/0000-0003-3696-2896
NR 22
TC 16
Z9 16
U1 0
U2 8
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-4484
J9 NANOTECHNOLOGY
JI Nanotechnology
PD JUL 23
PY 2008
VL 19
IS 29
AR 295704
DI 10.1088/0957-4484/19/29/295704
PG 5
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
   Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA 314VW
UT WOS:000256838300017
PM 21730609
ER

PT J
AU Kovalevsky, AY
   Katz, AK
   Carrell, HL
   Hanson, L
   Mustyakimov, M
   Fisher, SZ
   Coates, L
   Schoenborn, BP
   Bunick, GJ
   Glusker, JP
   Langan, P
AF Kovalevsky, Andrey Y.
   Katz, Amy K.
   Carrell, H. L.
   Hanson, Leif
   Mustyakimov, Marat
   Fisher, S. Zoe
   Coates, Leighton
   Schoenborn, Benno P.
   Bunick, Gerard J.
   Glusker, Jenny P.
   Langan, Paul
TI Hydrogen location in stages of an enzyme-catalyzed reaction:
   Time-of-flight neutron structure of D-xylose isomerase with bound
   D-xylulose
SO BIOCHEMISTRY
LA English
DT Article
ID ALDOSE-KETOSE INTERCONVERSION; PROTEIN CRYSTALLOGRAPHY; SPALLATION
   NEUTRONS; DIFFRACTION; RESOLUTION; MECHANISM; SHIFT
AB The time-of-flight neutron Laue technique has been used to determine the location of hydrogen atoms in the enzyme D-xylose isomerase (XI). The neutron structure of crystalline XI with bound product, D-xylulose, shows, unexpectedly, that O5 Of D-xylulose is not protonated but is hydrogen-bonded to doubly protonated His54. Also, Lys289, which is neutral in native XI, is protonated (positively charged), while the catalytic water in native XI has become activated to a hydroxyl anion which is in the proximity of Cl and C2, the molecular site of isomerization of xylose. These findings impact our understanding of the reaction mechanism.
C1 [Kovalevsky, Andrey Y.; Mustyakimov, Marat; Fisher, S. Zoe; Coates, Leighton; Schoenborn, Benno P.; Langan, Paul] Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
   [Katz, Amy K.; Carrell, H. L.; Glusker, Jenny P.] Fox Chase Canc Ctr, Philadelphia, PA 19111 USA.
   [Hanson, Leif] Univ Toledo, Dept Chem, Toledo, OH 43606 USA.
   [Bunick, Gerard J.] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
RP Langan, P (reprint author), Los Alamos Natl Lab, Biosci Div, M888, Los Alamos, NM 87545 USA.
EM langan_paul@lanl.gov
RI Hanson, Bryant Leif/F-8007-2010; Langan, Paul/N-5237-2015; 
OI Hanson, Bryant Leif/0000-0003-0345-3702; Langan,
   Paul/0000-0002-0247-3122; Coates, Leighton/0000-0003-2342-049X;
   Kovalevsky, Andrey/0000-0003-4459-9142
FU NCI NIH HHS [CA10925, CA06927, P30 CA006927, P30 CA006927-45, R01
   CA010925-53]; NIGMS NIH HHS [GM071939, R01 GM071939, R01 GM071939-05]
NR 18
TC 34
Z9 34
U1 0
U2 5
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0006-2960
J9 BIOCHEMISTRY-US
JI Biochemistry
PD JUL 22
PY 2008
VL 47
IS 29
BP 7595
EP 7597
DI 10.1021/bi8005434
PG 3
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 326NB
UT WOS:000257665100001
PM 18578508
ER

PT J
AU Criscenti, LJ
   Cygan, RT
   Kooser, AS
   Moffat, HK
AF Criscenti, Louise J.
   Cygan, Randall T.
   Kooser, Ara S.
   Moffat, Harold K.
TI Water and halide adsorption to corrosion surfaces: Molecular simulations
   of atmospheric interactions with aluminum oxyhydroxide and gold
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID X-RAY PHOTOELECTRON; ELECTRIC DOUBLE-LAYER; ACID-BASE PROPERTIES;
   NEAR-EDGE STRUCTURE; DYNAMICS SIMULATIONS; LIQUID WATER;
   COMPUTER-SIMULATIONS; STATICS CALCULATIONS; PITTING CORROSION; PROTON
   BINDING
AB Atmospheric corrosion due to adsorption of water and solutes onto metal and metal oxide surfaces is a critical factor in the long term reliability of electronic devices. To investigate the atomistic mechanisms of corrosion, we used molecular dynamics (MD) simulations to study the structure of water adsorbed onto both boehmite (gamma-AlO(OH)) and gold (An) surfaces and electrolyte adsorption and surface speciation on the boehmite (010) surface. Boehmite forms a thin film on aluminum metal under oxidizing conditions, is hydrophilic, and readily adsorbs water from the atmosphere. In contrast, gold surfaces are hydrophobic, and condensed water does not readily bond with the surface. Our MD simulations were performed using the CLAYFF force field that maintains full flexibility of water and substrate and allows for full energy and momentum transfer among all atoms. The boehmite (010) and gold (111) surfaces were initially simulated with no water present and then with incremental additions of water molecules. The calculations indicate the boehmite (0 10) surface structure strongly controls the organization of the first monolayer of interfacial water. In contrast, the structure of water on the gold (111) surface is controlled by hydrogen bonding among the water molecules. To investigate Cl- adsorption to the boehmite surface, Na+ and Cl- ions were added to two boehmite-water simulation cells, one with 3.5 monolayers of water on the boehmite surface and the other representing water-saturated conditions. In both scenarios, the addition of NaCl solute disturbed the first monolayer of water adsorbed to the surface. Chloride ions displaced water molecules that were originally bound to the boehmite surface. In contrast, the Na+ ions do not disturb the arrangement of these water molecules. Na+-Cl- pairs were observed to occur on the surface. Both the near-surface water structure and the effects of ion adsorption were similar regardless of the number of monolayers of water present in the simulation cells.
C1 [Criscenti, Louise J.; Cygan, Randall T.; Kooser, Ara S.; Moffat, Harold K.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Criscenti, LJ (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM ljcrisc@sandia.gov
NR 47
TC 18
Z9 18
U1 7
U2 32
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0897-4756
J9 CHEM MATER
JI Chem. Mat.
PD JUL 22
PY 2008
VL 20
IS 14
BP 4682
EP 4693
DI 10.1021/cm70278lr
PG 12
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 326NN
UT WOS:000257666300024
ER

PT J
AU Bell, JL
   Sarin, P
   Provis, JL
   Haggerty, RP
   Driemeyer, PE
   Chupas, PJ
   van Deventer, JSJ
   Kriven, WM
AF Bell, Jonathan L.
   Sarin, Pankaj
   Provis, John L.
   Haggerty, Ryan P.
   Driemeyer, Patrick E.
   Chupas, Peter J.
   van Deventer, Jannie S. J.
   Kriven, Waltraud M.
TI Atomic structure of a cesium aluminosilicate geopolymer: A pair
   distribution function study
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID X-RAY-DIFFRACTION; POWDER DIFFRACTION; INORGANIC POLYMERS;
   PHASE-TRANSITIONS; CRYSTAL-CHEMISTRY; HIGH-RESOLUTION; POLLUCITE;
   METAKAOLIN; MULLITE; GLASSES
AB The atomic pair distribution function (PDF) method was used to study the structure of cesium aluminosilicate geopolymer (Cs2O center dot Al2O3 center dot 4SiO(2)center dot xH(2)O, with x similar to 11). The geopolymer was prepared by reacting metakaolin with cesium silicate solution followed by curing at 50 degrees C for 24 h in a sealed container. Heating of Cs-geopolymer above 1000 degrees C resulted in formation of crystalline pollucite (CsAlSi2O6). PDF refinement of the pollucite phase formed displayed an excellent fit over the 10-30 angstrom range when compared with a cubic pollucite model. A poorer fit was attained from 1-10 angstrom due to an additional amorphous phase present in the heated geopolymer. On the basis of PDF analysis, unheated Cs-geopolymer displayed structural ordering similar to pollucite up to a length scale of similar to 9 angstrom, despite some differences. Our results suggest that hydrated Cs+ ions were an integral part of the Cs-geopolymer structure and that most of the water present was not associated with Al-OH or Si-OH bonds.
C1 [Bell, Jonathan L.; Sarin, Pankaj; Haggerty, Ryan P.; Driemeyer, Patrick E.; Kriven, Waltraud M.] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA.
   [Chupas, Peter J.] Argonne Natl Lab, Xray Sci Div, Adv Photon Source, Argonne, IL 60439 USA.
   [Provis, John L.; van Deventer, Jannie S. J.] Univ Melbourne, Dept Chem & Biomol Engn, Melbourne, Vic 3010, Australia.
RP Kriven, WM (reprint author), Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA.
EM kriven@illinois.edu
RI Provis, John/A-7631-2008
OI Provis, John/0000-0003-3372-8922
NR 49
TC 53
Z9 54
U1 7
U2 37
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0897-4756
J9 CHEM MATER
JI Chem. Mat.
PD JUL 22
PY 2008
VL 20
IS 14
BP 4768
EP 4776
DI 10.1021/cm703369s
PG 9
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 326NN
UT WOS:000257666300034
ER

PT J
AU Bala, G
   Rood, RB
   Bader, D
   Mirin, A
   Ivanova, D
   Drui, C
AF Bala, G.
   Rood, R. B.
   Bader, D.
   Mirin, A.
   Ivanova, D.
   Drui, Cedric
TI Simulated climate near steep topography: Sensitivity to numerical
   methods for atmospheric transport
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID VOLUME DYNAMICAL CORE; SYSTEM MODEL; RESOLUTION; CCSM3
AB We present the sensitivity of the simulated climate near steep topographical regions when the numerical method for atmospheric transport in the Community Climate System Model (CCSM3) is changed from spectral to a finite volume (FV) transport. Our analysis of the circulation and precipitation shows significant local improvement in three aspects: 1) The Gibbs oscillations present in the cloudiness and shortwave radiative forcing fields in the spectral simulation are absent in the FV simulation. 2) The along-shore component of wind stress in the western coastal regions of North and South America increases in the FV simulation. This tends to reduce the persistent biases in sea surface temperature through enhanced oceanic upwelling. 3) The FV simulation shows improvement in the wet-dry contrast of orographically forced precipitation. These local improvements have impact on continental and larger scales and are critical to the confident use of information from climate predictions in adaptation to climate change.
C1 [Bala, G.; Bader, D.; Mirin, A.; Ivanova, D.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   [Rood, R. B.; Drui, Cedric] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA.
RP Bala, G (reprint author), Indian Inst Sci, Ctr Atmospher & Ocean Sci, Bangalore 560012, Karnataka, India.
EM rbrood@umich.edu
RI Bader, David/H-6189-2011; Rood, Richard/C-5611-2008
OI Bader, David/0000-0003-3210-339X; Rood, Richard/0000-0002-2310-4262
NR 20
TC 7
Z9 7
U1 0
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD JUL 22
PY 2008
VL 35
IS 14
AR L14807
DI 10.1029/2008GL033204
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 331EM
UT WOS:000257995500001
ER

PT J
AU Dove, PM
   Han, N
   Wallace, AF
   De Yoreo, JJ
AF Dove, Patricia M.
   Han, Nizhou
   Wallace, Adam F.
   De Yoreo, James J.
TI Kinetics of amorphous silica dissolution and the paradox of the silica
   polymorphs
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
   AMERICA
LA English
DT Article
DE biogenic silica; demineralization; glass; nucleation; surface energy
ID SOLUTION SATURATION STATE; ATOMIC-FORCE MICROSCOPY; PRECIPITATION
   KINETICS; SOUTHERN-OCEAN; PH 3; GROWTH; QUARTZ; 80-DEGREES-C;
   SOLUBILITY; DEPENDENCE
AB The mechanisms by which amorphous silica dissolves have proven elusive because noncrystalline materials lack the structural order that allows them to be studied by the classical terrace, ledge, kink-based models applied to crystals. This would seem to imply amorphous phases have surfaces that are disordered at an atomic scale so that the transfer of SiO(4) tetrahedra to solution always leaves the surface free energy of the solid unchanged. As a consequence, dissolution rates of amorphous phases should simply scale linearly with increasing driving force (undersaturation) through the higher probability of detaching silica tetrahedra. By examining rate measurements for two amorphous SiO(2) glasses we find, instead, a paradox. In electrolyte solutions, these silicas show the same exponential dependence on driving force as their crystalline counterpart, quartz. We analyze this enigma by considering that amorphous silicas present two predominant types of surface-coordinated silica tetrahedra to solution. Electrolytes overcome the energy barrier to nucleated detachment of higher coordinated species to create a periphery of reactive, lesser coordinated groups that increase surface energy. The result is a plausible mechanism-based model that is formally identical with the classical polynuclear theory developed for crystal growth. The model also accounts for reported demineralization rates of natural biogenic and synthetic colloidal silicas. In principle, these insights should be applicable to materials with a wide variety of compositions and structural order when the reacting units are defined by the energies of their constituent species.
C1 [Dove, Patricia M.; Han, Nizhou; Wallace, Adam F.] Virginia Polytech Inst & State Univ, Dept Geosci, Blacksburg, VA 24061 USA.
   [De Yoreo, James J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Dove, PM (reprint author), Virginia Polytech Inst & State Univ, Dept Geosci, Blacksburg, VA 24061 USA.
EM dove@vt.edu; jjdeyoreo@lbl.gov
RI Dove, Patricia/A-7911-2010; Wallace, Adam/A-9976-2012
NR 28
TC 69
Z9 71
U1 5
U2 78
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD JUL 22
PY 2008
VL 105
IS 29
BP 9903
EP 9908
DI 10.1073/pnas.0803798105
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 330BB
UT WOS:000257913200012
PM 18632576
ER

PT J
AU Xu, K
   Rajashankar, KR
   Chan, YP
   Himanen, JP
   Broder, CC
   Nikolov, DB
AF Xu, Kai
   Rajashankar, Kanagalaghatta R.
   Chan, Yee-Peng
   Himanen, Juha P.
   Broder, Christopher C.
   Nikolov, Dimitar B.
TI Host cell recognition by the henipaviruses: Crystal structures of the
   Nipah G attachment glycoprotein and its complex with ephrin-B3
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
   AMERICA
LA English
DT Article
DE crystallography; viral attachment
ID EMERGENT DEADLY PARAMYXOVIRUS; HENDRA-VIRUS;
   HEMAGGLUTININ-NEURAMINIDASE; RECEPTOR-BINDING; EPH RECEPTORS;
   ECTODOMAIN; PROTEIN; FUSION; ANTAGONIST; MECHANISMS
AB Nipah virus (NiV) and Hendra virus are the type species of the highly pathogenic paramyxovirus genus Henipavirus, which can cause severe respiratory disease and fatal encephalitis infections in humans, with case fatality rates approaching 75%. NiV contains two envelope glycoproteins, the receptor-binding G glycoprotein (NiV-G) that facilitates attachment to host cells and the fusion (F) glycoprotein that mediates membrane merger. The henipavirus G glycoproteins lack both hemagglutinating and neuraminidase activities and, instead, engage the highly conserved ephrin-B2 and ephrin-B3 cell surface proteins as their entry receptors. Here, we report the crystal structures of the NiV-G,both in its receptor-unbound state and in complex with ephrin-B3, providing, to our knowledge, the first view of a paramyxovirus attachment complex in which a cellular protein is used as the virus receptor. Complex formation generates an extensive protein-protein interface around a protruding ephrin loop, which is inserted in the central cavity of the NiV-G beta-propeller. Analysis of the structural data reveals the molecular basis for the highly specific interactions of the henipavirus G glycoproteins with only two members (ephrin-B2 and ephrin-B3) of the very large ephrin family and suggests how they mediate in a unique fashion both cell attachment and the initiation of membrane fusion during the virus infection processes. The structures further suggest that the NiV-G/ephrin interactions can be effectively targeted to disrupt viral entry and provide the foundation for structure-based antiviral drug design.
C1 [Xu, Kai; Himanen, Juha P.; Nikolov, Dimitar B.] Mem Sloan Kettering Canc Ctr, Struct Biol Program, New York, NY 10021 USA.
   [Rajashankar, Kanagalaghatta R.] Argonne Natl Lab, Adv Photon Source, NE Collaborat Access Team, Argonne, IL 60439 USA.
   [Chan, Yee-Peng; Broder, Christopher C.] Uniformed Serv Univ Hlth Sci, Dept Microbiol & Immunol, Bethesda, MD 20814 USA.
RP Nikolov, DB (reprint author), Mem Sloan Kettering Canc Ctr, Struct Biol Program, 1275 York Ave, New York, NY 10021 USA.
EM nikolovd@mskcc.org
FU NCRR NIH HHS [RR-15301, P41 RR015301]; NIAID NIH HHS [U54 AI057168, U01
   AI077995, R01 AI054715, AI057168, AI054715]; NINDS NIH HHS [NS38486, R01
   NS038486]
NR 42
TC 94
Z9 98
U1 2
U2 5
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD JUL 22
PY 2008
VL 105
IS 29
BP 9953
EP 9958
DI 10.1073/pnas.0804797105
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 330BB
UT WOS:000257913200021
PM 18632560
ER

PT J
AU Chinnasamy, CN
   Huang, JY
   Lewis, LH
   Latha, B
   Vittoria, C
   Harris, VG
AF Chinnasamy, C. N.
   Huang, J. Y.
   Lewis, L. H.
   Latha, B.
   Vittoria, C.
   Harris, V. G.
TI Direct chemical synthesis of high coercivity air-stable SmCo nanoblades
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID MAGNETIC-PROPERTIES; PERMANENT-MAGNETS; NANOPARTICLES
AB Ferromagnetic air-stable SmCo nanoparticles have been produced directly using a one-step chemical synthesis method. X-ray diffraction studies confirmed the formation of hexagonal SmCo(5) as a dominant phase. High resolution transmission electron microscopy confirms the presence of uniform, anisotropic bladelike nanoparticles approximately 10 nm in width and 100 nm in length. Values of the intrinsic coercivity and the magnetization in the as-synthesized particles are 6.1 kOe and 40 emu/g at room temperature and 8.5 kOe and 44 emu/g at 10 K, respectively. This direct synthesis process is environmentally friendly and is readily scalable to large volume synthesis to meet the needs for the myriad of advanced permanent magnet applications. (C) 2008 American Institute of Physics.
C1 [Chinnasamy, C. N.; Latha, B.; Vittoria, C.; Harris, V. G.] Northeastern Univ, Dept Elect & Comp Engn, Ctr Microwave Magnet Mat & Integrated Circuits, Boston, MA 02115 USA.
   [Huang, J. Y.] Sandia Natl Labs, Ctr Integrated Nanotechnol, Albuquerque, NM 87185 USA.
   [Lewis, L. H.] Northeastern Univ, Dept Chem Engn, Boston, MA 02115 USA.
RP Chinnasamy, CN (reprint author), Northeastern Univ, Dept Elect & Comp Engn, Ctr Microwave Magnet Mat & Integrated Circuits, Boston, MA 02115 USA.
EM nchinnas@ece.neu.edu
RI Harris, Vincent/A-8337-2009; Huang, Jianyu/C-5183-2008
NR 23
TC 35
Z9 35
U1 2
U2 18
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 21
PY 2008
VL 93
IS 3
AR 032505
DI 10.1063/1.2963034
PG 3
WC Physics, Applied
SC Physics
GA 330UQ
UT WOS:000257968700055
ER

PT J
AU Chae, PS
   Wander, MJ
   Bowling, AP
   Laible, PD
   Gellman, SH
AF Chae, Pil S.
   Wander, Marc J.
   Bowling, Aaron P.
   Laible, Philip D.
   Gellman, Samuel H.
TI Glycotripod amphiphiles for solubilization and stabilization of a
   membrane-protein superassembly: Importance of branching in the
   hydrophilic portion
SO CHEMBIOCHEM
LA English
DT Article
DE amphiphiles; detergent design; membrane proteins; solubilization;
   stabilization
ID PHOTOSYNTHETIC APPARATUS; RHODOBACTER-SPHAEROIDES; TRIPOD AMPHIPHILE;
   REACTION CENTERS; PURPLE BACTERIA; CORE COMPLEX; CRYSTALLIZATION;
   DETERGENTS; BIOCHEMISTRY; SURFACTANTS
C1 [Wander, Marc J.; Bowling, Aaron P.; Laible, Philip D.] Argonne Natl Lab, Biosci Div, Argonne, IL 60439 USA.
   [Chae, Pil S.; Gellman, Samuel H.] Univ Wisconsin, Dept Chem, Madison, WI 53706 USA.
RP Laible, PD (reprint author), Argonne Natl Lab, Biosci Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM laible@anl.gov; geliman@wisc.edu
FU NIGMS NIH HHS [P01 GM75913, P01 GM075913]
NR 33
TC 36
Z9 36
U1 0
U2 5
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1439-4227
J9 CHEMBIOCHEM
JI ChemBioChem
PD JUL 21
PY 2008
VL 9
IS 11
BP 1706
EP 1709
DI 10.1002/cbic.200800169
PG 4
WC Biochemistry & Molecular Biology; Chemistry, Medicinal
SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy
GA 332OM
UT WOS:000258092300004
PM 18576450
ER

PT J
AU D'Aleo, A
   Xu, J
   Moore, EG
   Jocher, CJ
   Raymond, KN
AF D'Aleo, Anthony
   Xu, Jide
   Moore, Evan G.
   Jocher, Christoph J.
   Raymond, Kenneth N.
TI Aryl-bridged 1-hydroxypyridin-2-one: Sensitizer ligands for Eu(III)
SO INORGANIC CHEMISTRY
LA English
DT Article
ID LUMINESCENT LANTHANIDE COMPLEXES; TERBIUM COMPLEXES; HIGH-RELAXIVITY;
   IONS; EU3+; AGENTS; ND3+
AB The synthesis, crystal structure, solution stability, and photophysical properties of an aryl group bridging two 1-hydroxypyridin-2-one units complexed to Eu(III) are reported. The results show that this backbone unit increases the rigidity of the ensuing complex, and also the conjugation of the ligand. As a result of the latter, the singlet absorption energy is decreased, along with the energy of the lowest excited triplet state, The resulting efficiency of sensitization for the Eu(III) ion is influenced by these phenomena, yielding an overall quantum yield of 6.2% in aqueous solution. The kinetic parameters arising from the luminescence data reveal an enhanced nonradiative decay rate for this compound when compared to previously reported aliphatic bridges.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
RP Raymond, KN (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
EM raymond@socrates.berkeley.edu
FU NHLBI NIH HHS [HL69832, R01 HL069832, R01 HL069832-06]
NR 17
TC 25
Z9 25
U1 2
U2 7
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 JUL 21
PY 2008
VL 47
IS 14
BP 6109
EP 6111
DI 10.1021/ic8003189
PG 3
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 326FC
UT WOS:000257642700002
PM 18553909
ER

PT J
AU Rodriguez, EE
   Poineau, F
   Llobet, A
   Czerwinski, K
   Seshadri, R
   Cheetham, AK
AF Rodriguez, Efrain E.
   Poineau, Frederic
   Llobet, Anna
   Czerwinski, Ken
   Seshadri, Ram
   Cheetham, Anthony K.
TI Preparation and crystal structures of bismuth technetates: A new metal
   oxide system
SO INORGANIC CHEMISTRY
LA English
DT Article
ID RAY-ABSORPTION SPECTROSCOPY; X-RAY; ELECTRON LOCALIZATION; RUTHENIUM
   PYROCHLORES; NEUTRON-DIFFRACTION; BAND-STRUCTURE; TRANSITION;
   PB2RU2O6.5; DISORDER; BI2RU2O7
AB Two new oxides have been unambiguously identified as Bi2Tc2O7-delta with delta = 0.14(1) and Bi3TcO8 through X-ray absorption near-edge structure spectroscopy and neutron powder diffraction. The compound Bi2Tc2O7-delta has a cubic pyrochlore-type structure with a = 10,4746(1) angstrom, space group Fd3m (origin choice 2), and Z = 8. The compound Bi3Tc2O7-delta is also cubic, a = 11.5749(1) angstrom, space group P2(1)3, Z= 8, and has a fluorite-related crystal structure. In Bi2Tc2O7-delta the Tc(IV) cations are octahedrally coordinated, whereas in Bi3TcO8 the Tc(VII) cations are tetrahedrally coordinated. A third new phase, probably Bi3Tc3O11, could not be obtained pure, but preliminary X-ray powder diffraction data affords a primitive cubic lattice with a = 9.3433(1) angstrom. On the basis of structural similarities between Bi2Tc2O7-delta and closely related oxides, Bi2Tc2O7-delta is expected to be a metallic oxide with Pauli paramagnetism. Electronic structure calculations of both Bi2Tc2O7-delta and Bi3TcO8 further support metallic conductivity in the former and insulating behavior in the latter. The inert pair effect of the Bi cations on the crystal structures of Bi2Tc2O7-delta and Bi3TcO8 is also described. In addition, calculations of the valence electron localization function for Bi2TC2O7-delta and Bi3TcO8 provide further visualization of the Bi 6s(2) lone pair electrons in the real space of the crystal structures.
C1 [Cheetham, Anthony K.] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England.
   [Rodriguez, Efrain E.; Llobet, Anna] Los Alamos Natl Lab, Manuel Lujan Jr Neutron Scattering Ctr, Los Alamos, NM 87545 USA.
   [Rodriguez, Efrain E.; Seshadri, Ram] Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA.
   [Poineau, Frederic; Czerwinski, Ken] Univ Nevada, Harry Reid Ctr Environm Studies, Las Vegas, NV 89154 USA.
RP Cheetham, AK (reprint author), Univ Cambridge, Dept Mat Sci & Met, Pembroke St, Cambridge CB2 3QZ, England.
EM akc30@cam.ac.uk
RI Llobet, Anna/B-1672-2010; Lujan Center, LANL/G-4896-2012; Seshadri,
   Ram/C-4205-2013; ID, MRCAT/G-7586-2011; Rodriguez, Efrain/N-1928-2013
OI Seshadri, Ram/0000-0001-5858-4027; Rodriguez, Efrain/0000-0001-6044-1543
NR 56
TC 20
Z9 20
U1 0
U2 30
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 JUL 21
PY 2008
VL 47
IS 14
BP 6281
EP 6288
DI 10.1021/ic8003273
PG 8
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 326FC
UT WOS:000257642700025
PM 18572909
ER

PT J
AU Tenderholt, AL
   Szilagyi, RK
   Holm, RH
   Hodgson, KO
   Hedman, B
   Solomon, EI
AF Tenderholt, Adam L.
   Szilagyi, Robert K.
   Holm, Richard H.
   Hodgson, Keith O.
   Hedman, Britt
   Solomon, Edward I.
TI Electronic control of the "Bailar Twist" in formally d(0)-d(2)
   molybdenum tris(dithiolene) complexes: A sulfur K-edge X-ray absorption
   spectroscopy and density functional theory study
SO INORGANIC CHEMISTRY
LA English
DT Article
ID EFFECTIVE CORE POTENTIALS; TRIGONAL-PRISMATIC COORDINATION; OXYGEN-ATOM
   TRANSFER; MOLECULAR-STRUCTURE; OCTAHEDRAL COORDINATION;
   TRIS(BENZENE-1,2-DITHIOLATO) COMPLEXES; METAL-COMPLEXES; TRANSFER
   SERIES; DMSO REDUCTASE; WAVE-FUNCTIONS
AB Sulfur K-edge X-ray absorption spectroscopy (XAS) and density functional theory (DFT) calculations have been used to determine the electronic structures of a series of Mo tris(dithiolene) complexes, [Mo(mdt)(3)](z) (where mdt = 1,2-dimethylethene-1,2-dithiolate(2-) and z = 2-, 1 -, 0), with near trigonal-prismatic geometries (D-3h symmetry). These results show that the formally Mo-IV, Mo-V, and Mo-VI complexes actually have a (dz(2))(2) configuration, that is, remain effectively Mo-IV despite oxidation, Comparisons with the XAS data of another set of Mo tris(dithiolene) complexes, [Mo(tbbdt)(3)](z) (where tbbdt = 3,5-ditert-butylbenzene-1,2-dithiolate(2-) and z = 1-, 0), show that both neutral complexes, [Mo(mdt)31 and [Mo(tbbdt)31, have similar electronic structures while the monoanions do not. Calculations reveal that the "Bailar twist" present in the crystal structure of [Mo(tbbdt)(3)](1-) (D-3 symmetry) but not [Mo(mdt)(3)](1-) (D-3h symmetry) is controlled by electronic factors which arise from bonding differences between the mdt and tbbdt ligands. In the former, configuration interaction between the Mo d(z)(2) and a deeper energy, occupied ligand orbital, which occurs in D-3 symmetry, destabilizes the Mo d(z)(2) to above another ligand orbital which is half-occupied in the D-3h [Mo(mdt)(3)](1-) complex. This leads to a metal d' configuration with no ligand holes (i.e., d(1)[L-3](0h)) for [Mo(tbbdt)(3)](1-) rather than the metal d(2) configuration with one ligand hole (i.e., d(2)[L-3](1h)) for [Mo(mdt)(3)](1-). Thus, the Bailar twist observed in some metal tris(dithiolene) complexes is the result of configuration interaction between metal and ligand orbitals and can be probed experimentally by S K-edge XAS.
C1 [Holm, Richard H.] Harvard Univ, Dept Chem & Biol Chem, Cambridge, MA 02143 USA.
   [Tenderholt, Adam L.; Szilagyi, Robert K.; Hodgson, Keith O.; Solomon, Edward I.] Stanford Univ, Dept Chem, Stanford, CA 94305 USA.
   [Hodgson, Keith O.; Hedman, Britt] Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
RP Holm, RH (reprint author), Harvard Univ, Dept Chem & Biol Chem, Cambridge, MA 02143 USA.
EM edward.solomon@stanford.edu
RI Szilagyi, Robert/G-9268-2012
OI Szilagyi, Robert/0000-0002-9314-6222
FU NCRR NIH HHS [P41 RR001209, P41 RR001209-29, RR-001209]
NR 46
TC 41
Z9 41
U1 1
U2 14
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
EI 1520-510X
J9 INORG CHEM
JI Inorg. Chem.
PD JUL 21
PY 2008
VL 47
IS 14
BP 6382
EP 6392
DI 10.1021/ic800494h
PG 11
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 326FC
UT WOS:000257642700037
PM 18517189
ER

PT J
AU Sekino, H
   Maeda, Y
   Yanai, T
   Harrison, RJ
AF Sekino, Hideo
   Maeda, Yasuyuki
   Yanai, Takeshi
   Harrison, Robert J.
TI Basis set limit Hartree-Fock and density functional theory response
   property evaluation by multiresolution multiwavelet basis
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID ELECTRONIC-STRUCTURE CALCULATIONS; QUANTUM-CHEMISTRY; WAVELETS; BASES;
   ATOMS; REPRESENTATION; OPERATORS; SCHEMES
AB We describe the evaluation of response properties using multiresolution multiwavelet (MRMW) basis sets. The algorithm uses direct projection of the perturbed density operator onto the zeroth order density operator on the real space spanned by the MRMW basis set and is applied for evaluating the polarizability of small molecules using Hartree-Fock and Kohn-Sham density functional theory. The computed polarizabilities can be considered to be converged to effectively complete space within the requested precision. The efficiency of the method against the ordinary Gaussian basis computation is discussed. (C) 2008 American Institute of Physics.
C1 [Sekino, Hideo; Maeda, Yasuyuki] Toyohashi Univ Technol, Dept Knowledge Based Informat Engn, Toyohashi, Aichi 4418580, Japan.
   [Yanai, Takeshi] Natl Inst Nat Sci, Inst Mol Sci, Okazaki, Aichi 4448585, Japan.
   [Harrison, Robert J.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   [Harrison, Robert J.] Univ Tennessee, Knoxville, TN 37996 USA.
RP Sekino, H (reprint author), Toyohashi Univ Technol, Dept Knowledge Based Informat Engn, Toyohashi, Aichi 4418580, Japan.
EM sekino@tutkie.tut.ac.jp
NR 35
TC 24
Z9 24
U1 1
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUL 21
PY 2008
VL 129
IS 3
AR 034111
DI 10.1063/1.2955730
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 329BA
UT WOS:000257840700011
PM 18647020
ER

PT J
AU Shen, TY
   Hamelberg, D
AF Shen, Tongye
   Hamelberg, Donald
TI A statistical analysis of the precision of reweighting-based simulations
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID ACCELERATED MOLECULAR-DYNAMICS; PROTEIN-STRUCTURE PREDICTION; INFREQUENT
   EVENTS; EQUALITY; GLASSES; SYSTEMS; MODELS
AB Various advanced simulation techniques, which are used to sample the statistical ensemble of systems with complex Hamiltonians, such as those displayed in condensed matters and biomolecular systems, rely heavily on successfully reweighting the sampled configurations. The sampled points of a system from an elevated thermal environment or on a modified Hamiltonian are reused with different statistical weights to evaluate its properties at the initial desired temperature or of the original Hamiltonian. Often, the decrease of accuracy induced by this procedure is ignored and the final results can be far from what is expected. We have addressed the reasons behind such a phenomenon and have provided a quantitative method to estimate the number of sampled points required in the crucial step of reweighting of these advanced simulation methods. We also provided examples from temperature histogram reweighting and accelerated molecular dynamics reweighting to illustrate this idea, which can be generalized to the dynamic reweighting as well. The study shows that this analysis may provide a priori guidance for the strategy of setting up the parameters of advanced simulations before a lengthy one is carried out. The method can therefore provide insights for optimizing the parameters for high accuracy simulations with finite amount of computational resources. (C) 2008 American Institute of Physics.
C1 [Shen, Tongye] Los Alamos Natl Lab, Theoret Biol & Biophys Grp, Los Alamos, NM 87545 USA.
   [Shen, Tongye] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
   [Hamelberg, Donald] Georgia State Univ, Dept Chem, Atlanta, GA 30302 USA.
RP Shen, TY (reprint author), Los Alamos Natl Lab, Theoret Biol & Biophys Grp, POB 1663, Los Alamos, NM 87545 USA.
EM tshen@lanl.gov
RI Shen, Tongye/A-9718-2008
OI Shen, Tongye/0000-0003-1495-3104
NR 37
TC 50
Z9 50
U1 2
U2 13
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUL 21
PY 2008
VL 129
IS 3
AR 034103
DI 10.1063/1.2944250
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 329BA
UT WOS:000257840700003
PM 18647012
ER

PT J
AU Warshavsky, VB
   Song, XY
AF Warshavsky, Vadim B.
   Song, Xueyu
TI Fundamental measure density functional theory studies on the freezing of
   binary hard-sphere and Lennard-Jones mixtures
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID PERTURBATION-THEORY; FLUID MIXTURES; SIMPLE LIQUIDS; THERMODYNAMIC
   PROPERTIES; PHASE-EQUILIBRIUM; COEXISTENCE; SIMULATION; COMPONENT;
   DIAGRAMS; SYSTEMS
AB Free energies and correlation functions of liquid and solid hard-sphere (HS) mixtures are calculated using the fundamental measure density functional theory. Using the thermodynamic perturbation theory the free energies of solid and liquid Lennard-Jones (LJ) mixtures are obtained from correlation functions of HS systems within a single theoretical approach. The resulting azeotrope- and spindle-type solid-liquid phase diagrams of HS and LJ binary mixtures are in good agreement with the corresponding ones from computer simulations. (C) 2008 American Institute of Physics.
C1 [Warshavsky, Vadim B.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
   Iowa State Univ, Dept Chem, Ames, IA 50011 USA.
RP Warshavsky, VB (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
EM xsong@iastate.edu
NR 41
TC 13
Z9 13
U1 2
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUL 21
PY 2008
VL 129
IS 3
AR 034506
DI 10.1063/1.2953329
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 329BA
UT WOS:000257840700021
PM 18647030
ER

PT J
AU Slater, M
   Adolphsen, C
   Arnold, R
   Boogert, S
   Boorman, G
   Gournaris, F
   Hildreth, M
   Hlaing, C
   Jackson, F
   Khainovski, O
   Kolomensky, YG
   Lyapin, A
   Maiheu, B
   McCormick, D
   Miller, DJ
   Orimoto, TJ
   Szalata, Z
   Thomson, M
   Ward, D
   Wing, M
   Woods, M
AF Slater, M.
   Adolphsen, C.
   Arnold, R.
   Boogert, S.
   Boorman, G.
   Gournaris, F.
   Hildreth, M.
   Hlaing, C.
   Jackson, F.
   Khainovski, O.
   Kolomensky, Yu. G.
   Lyapin, A.
   Maiheu, B.
   McCormick, D.
   Miller, D. J.
   Orimoto, T. J.
   Szalata, Z.
   Thomson, M.
   Ward, D.
   Wing, M.
   Woods, M.
TI Cavity BPM system tests for the ILC energy spectrometer
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE cavity beam position monitor; BPM; end station A; ESA; international
   linear collider; ILC; energy spectrometer; beam orbit stability
ID MONITOR
AB The main physics programme of the International Linear Collider (ILC) requires a measurement of the beam energy at the interaction point with an accuracy of 10(-4) or better. To achieve this goal a magnetic spectrometer using high resolution beam position monitors (BPMs) has been proposed. This paper reports on the cavity BPM system that was deployed to test this proposal. We demonstrate sub-micron resolution and micron level stability over 20 h for a 1 m long BPM triplet. We find micron-level stability over 1 h for 3 BPM stations distributed over a 30 m long baseline. The understanding of the behaviour and response of the BPMs gained from this work has allowed full spectrometer tests to be carried out. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Hlaing, C.; Khainovski, O.; Kolomensky, Yu. G.; Orimoto, T. J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [Orimoto, T. J.] CALTECH, Pasadena, CA 91125 USA.
   [Slater, M.; Thomson, M.; Ward, D.] Univ Cambridge, HEP Grp, Cambridge CB3 0HE, England.
   [Jackson, F.] Daresbury Lab, Daresbury, Cheshire, England.
   [Gournaris, F.; Lyapin, A.; Maiheu, B.; Miller, D. J.; Wing, M.] UCL, London, England.
   [Hildreth, M.] Univ Notre Dame, Notre Dame, IN 46556 USA.
   [Boogert, S.; Boorman, G.] Univ London, Egham, Surrey, England.
   [Adolphsen, C.; Arnold, R.; McCormick, D.; Szalata, Z.; Woods, M.] Stanford Linear Accelerator Ctr, Menlo Pk, CA USA.
RP Slater, M (reprint author), Univ Birmingham, Sch Phys & Astron, Particle Phys Grp, Birmingham B15 2TT, W Midlands, England.
EM slater@hep.phy.cam.ac.uk
RI Wing, Matthew/C-2169-2008; Kolomensky, Yury/I-3510-2015; 
OI Kolomensky, Yury/0000-0001-8496-9975; Thomson, Mark/0000-0002-2654-9005
NR 13
TC 8
Z9 9
U1 0
U2 1
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 JUL 21
PY 2008
VL 592
IS 3
BP 201
EP 217
DI 10.1016/j.nima.2008.04.033
PG 17
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 334WP
UT WOS:000258252500009
ER

PT J
AU Hakobyan, H
   Brooks, WK
   Bruhwel, K
   Burkert, VD
   Carstens, T
   Christo, S
   Egiyan, H
   Gevorgyan, N
   Gram, J
   Hafidi, K
   Hemler, P
   Insley, D
   Jacobs, G
   Kashy, D
   Mecking, BA
   Sharabian, Y
   Stepanyan, S
   Tilles, D
   Weinstein, L
   Zheng, X
AF Hakobyan, H.
   Brooks, W. K.
   Bruhwel, K.
   Burkert, V. D.
   Carstens, T.
   Christo, S.
   Egiyan, H.
   Gevorgyan, N.
   Gram, J.
   Hafidi, K.
   Hemler, P.
   Insley, D.
   Jacobs, G.
   Kashy, D.
   Mecking, B. A.
   Sharabian, Y.
   Stepanyan, S.
   Tilles, D.
   Weinstein, L.
   Zheng, X.
TI A double-target system for precision measurements of nuclear medium
   effects
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE nuclear target; precision experiments on nuclei; low-mass vacuum
   chambers; electron scattering
AB A double-target system has been developed for precision measurements of nuclear medium effects in unpolarized electron scattering with 4-5 GeV electron beams. This system allows for a precise comparison of elementary targets such as deuterium and hydrogen to heavy solid targets to study subtle medium effects such as color transparency, transverse momentum broadening, and hadron attenuation. One cryo-target and one solid target were located in the beam simultaneously, separated by 4 cm to minimize acceptance correction differences in the large CLAS spectrometer while maintaining the ability to identify the target event-by-event. Because both targets were positioned in the beam simultaneously, time-dependent systematic effects such as drifting gains or inefficient detector channels cancel in ratios of observables, increasing the precision of the final results. Measurements were performed with hydrogen and deuterium in combination with 3 mm diameter targets of carbon, aluminum, iron, tin, and lead. The solid targets and deuterium target were comparable in thicknesses except for specialized diagnostic runs with ultra-thin aluminum. Switching of the solid targets was performed remotely and required only a few seconds to complete. An ultra-low mass vacuum chamber made from Rohacell(C) foam provided vacuum isolation of the cryotarget without adding significantly to multiple scattering of final-state particles. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Brooks, W. K.] Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile.
   [Brooks, W. K.] Univ Tecn Federico Santa Maria, Ctr Estudios Subatom, Valparaiso, Chile.
   [Hakobyan, H.] Yerevan State Univ, Yerevan 375049, Armenia.
   [Hakobyan, H.; Gevorgyan, N.] Yerevan Phys Inst, Yerevan 375036, Armenia.
   [Hakobyan, H.; Brooks, W. K.; Bruhwel, K.; Burkert, V. D.; Carstens, T.; Christo, S.; Egiyan, H.; Gevorgyan, N.; Gram, J.; Hemler, P.; Insley, D.; Jacobs, G.; Kashy, D.; Mecking, B. A.; Sharabian, Y.; Stepanyan, S.; Tilles, D.] Thomas Jefferson Natl Accelerator Lab, Newport News, VA USA.
   [Weinstein, L.] Old Dominion Univ, Norfolk, VA USA.
   [Hafidi, K.; Zheng, X.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   [Egiyan, H.] Univ New Hampshire, Durham, NH 03824 USA.
   Univ Virginia, Charlottesville, VA USA.
RP Brooks, WK (reprint author), Univ Tecn Federico Santa Maria, Dept Fis, Av Espana 1680,Casilla 110-V, Valparaiso, Chile.
EM brooksw@jlab.org
RI Brooks, William/C-8636-2013
OI Brooks, William/0000-0001-6161-3570
NR 3
TC 7
Z9 7
U1 0
U2 0
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 JUL 21
PY 2008
VL 592
IS 3
BP 218
EP 223
DI 10.1016/j.nima.2008.04.055
PG 6
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 334WP
UT WOS:000258252500010
ER

PT J
AU Brown, DN
   Ilic, J
   Mohanty, GB
AF Brown, D. N.
   Ilic, J.
   Mohanty, G. B.
TI Extracting longitudinal shower development information from crystal
   calorimetry plus tracking
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE particle identification; longitudinal shower depth; electromagnetic
   calorimetry; tracking
ID DETECTOR
AB We present an approach to derive longitudinal shower development information from the longitudinally unsegmented BABAR electromagnetic calorimeter by using tracking information. Our algorithm takes advantage of the good three-dimensional tracking resolution of BABAR, which provides an independent geometric constraint on the shower as measured in the BABAR crystal calorimeter. We show that adding the derived longitudinal shower development information to standard particle identification algorithms significantly improves the low momentum separation of pions from electrons and muons. We also verify that the energy dependence of the electromagnetic shower development we measure is consistent with the prediction of a standard electromagnetic shower model. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Ilic, J.; Mohanty, G. B.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
   [Brown, D. N.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Mohanty, GB (reprint author), Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
EM Dave_Brown@lbl.gov; J.Ilic@warwick.ac.uk; G.B.Mohanty@warwick.ac.uk
NR 14
TC 1
Z9 1
U1 0
U2 1
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 JUL 21
PY 2008
VL 592
IS 3
BP 254
EP 260
DI 10.1016/j.nima.2008.04.029
PG 7
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 334WP
UT WOS:000258252500014
ER

PT J
AU Fenker, H
   Baillie, N
   Bradshaw, P
   Bueltmann, S
   Burkert, V
   Christy, M
   Dodge, G
   Dutta, D
   Ent, R
   Evans, J
   Fersch, R
   Giovanetti, K
   Griffioen, K
   Ispiryan, M
   Jayalath, C
   Kalantarians, N
   Keppel, C
   Kuhn, S
   Niculescu, G
   Niculescu, I
   Tkachenko, S
   Tvaskis, V
   Zhang, J
AF Fenker, H.
   Baillie, N.
   Bradshaw, P.
   Bueltmann, S.
   Burkert, V.
   Christy, M.
   Dodge, G.
   Dutta, D.
   Ent, R.
   Evans, J.
   Fersch, R.
   Giovanetti, K.
   Griffioen, K.
   Ispiryan, M.
   Jayalath, C.
   Kalantarians, N.
   Keppel, C.
   Kuhn, S.
   Niculescu, G.
   Niculescu, I.
   Tkachenko, S.
   Tvaskis, V.
   Zhang, J.
TI BoNus: Development and use of a radial TPC using cylindrical GEMs
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE GEM; TPC; curved GEM; spectator tagging; neutron structure; JLab
ID PROTON-NEUTRON INTERACTIONS; ELECTRON MULTIPLIER GEM; QUARK-HADRON
   DUALITY; GAS DETECTORS; SCATTERING; CHAMBER
AB A specialized system of target and detector was developed at Jefferson Lab to provide new access to information about neutron structure from electron-neutron interactions. It allows identification and measurement of spectator protons produced in e(-)d --> e(-)p(s)X scattering events. The detector is a radial time-projection chamber optimized for the acceptance of low-momentum protons. Gas gain is provided by three cascaded curved Gas Electron Multipliers (GEMs), the first application of GEMs in any configuration other than flat. This article provides details about the development and construction of the detector, its performance, and the analysis of the data from the successful running of its first physics experiment. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Fenker, H.; Burkert, V.; Ent, R.] Jefferson Lab, Thomas Jefferson Natl Accelerator Facil, Div Phys, Newport News, VA 23606 USA.
   [Baillie, N.; Evans, J.; Fersch, R.; Griffioen, K.] Coll William & Mary, Williamsburg, VA USA.
   [Bradshaw, P.; Bueltmann, S.; Dodge, G.; Kuhn, S.; Tkachenko, S.; Zhang, J.] Old Dominion Univ, Norfolk, VA USA.
   [Christy, M.; Jayalath, C.; Keppel, C.; Tvaskis, V.] Hampton Univ, Hampton, VA 23668 USA.
   [Dutta, D.] Tri Univ Nucl Lab, Durham, NH USA.
   [Giovanetti, K.; Niculescu, G.; Niculescu, I.] James Madison Univ, Harrisonburg, VA 22807 USA.
   [Ispiryan, M.; Kalantarians, N.] Univ Houston, Houston, TX USA.
RP Fenker, H (reprint author), Jefferson Lab, Thomas Jefferson Natl Accelerator Facil, Div Phys, 12000 Jefferson Ave,Suite 6, Newport News, VA 23606 USA.
EM hcf@jlab.org
RI Zhang, Jixie/A-1461-2016
NR 40
TC 11
Z9 11
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 JUL 21
PY 2008
VL 592
IS 3
BP 273
EP 286
DI 10.1016/j.nima.2008.04.047
PG 14
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 334WP
UT WOS:000258252500016
ER

PT J
AU Tremsin, AS
   Vallerga, JV
   McPhate, JB
   Siegmund, OHW
   Feller, WB
   Crow, L
   Cooper, RG
AF Tremsin, A. S.
   Vallerga, J. V.
   McPhate, J. B.
   Siegmund, O. H. W.
   Feller, W. B.
   Crow, L.
   Cooper, R. G.
TI On the possibility to image thermal and cold neutron with sub-15 mu m
   spatial resolution
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE neutron imaging; high spatial resolution; detection efficiency
ID MICROCHANNEL-PLATE DETECTORS; EFFICIENCY; MEDIPIX2; SQUARE; CHIP
AB Due to the absence of efficient neutron focusing optics the spatial resolution needed for neutron imaging requires either a high-resolution detector, as in the case of direct projection radiography, or else a bright point source as in the case of magnification imaging geometry. The very limited neutron flux in the latter makes it unacceptably slow and thus puts more emphasis on improving the detector resolution. In this paper, we present the first experimental evidence of imaging both thermal and cold neutrons with a spatial accuracy better than 15 mu m FWHM. This resolution is possible due to some unique features of neutron sensitive microchannel plates (MCPs). The position of the neutron capture event can be determined with high accuracy because the event is contained within a single or two channels of the MCP. The products of neuron capture have ranges of only a few microns in the MCP glass. The channel has a typical diameter of 6-10 mu m and the inter-channel wall thickness averages 2-3 mu m. Once the neutron capture initiates an electron avalanche in the MCP, the event position encoding is identical with photon/charged particle detection, for which the MCP technology has been widely used for several decades. Images demonstrating single channel resolution were taken using cold neutrons incident on a Gd pinhole mask and one with 20-50 mu m B(4)C particles. The proof-of-principle images were obtained at a low count rate limited by the present version of the readout electronics. Development of a new fast readout schemes is an active area of research and the rate capability of this detector should benefit from these efforts. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Tremsin, A. S.; Vallerga, J. V.; McPhate, J. B.; Siegmund, O. H. W.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
   [Feller, W. B.] NOVA Sci Inc, Sturbridge, MA 01566 USA.
   [Crow, L.; Cooper, R. G.] Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA.
RP Tremsin, AS (reprint author), Univ Calif Berkeley, Space Sci Lab, 7 Gauss Way, Berkeley, CA 94720 USA.
EM ast@ssl.berkeley.edu
NR 29
TC 49
Z9 49
U1 3
U2 12
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 JUL 21
PY 2008
VL 592
IS 3
BP 374
EP 384
DI 10.1016/j.nima.2008.03.116
PG 11
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 334WP
UT WOS:000258252500027
ER

PT J
AU Berman, GP
   Gorshkov, VN
   Tsifrinovich, VI
AF Berman, G. P.
   Gorshkov, V. N.
   Tsifrinovich, V. I.
TI Optimization and new applications of a magnetic trap for ultra-cold
   neutrons
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE ultra-cold neutrons; magnetic trap; decoherence time
ID LIFETIME; STORAGE
AB We discuss some problems related to the physics and dynamic behavior of ultra-cold neutrons (UCNs) in a magnetic trap. First, we present the results of our computer simulations for the permanent-magnet neutron magnetic trap suggested by J.D. Bowman and P.L. Walstrom. We demonstrate how to optimize parameters in order to minimize the "cleaning time" in the trap. Next, we propose using a magnetic trap for UCNs as an ultrasensitive method, for measuring the neutron magnetic resonance. We also propose using this method to measure the decoherence time of the neutron spins and to measure more accurately the neutron gyromagnetic ratio. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Berman, G. P.; Gorshkov, V. N.] Los Alamos Natl Lab, Complex Syst Grp, Los Alamos, NM 87545 USA.
   [Berman, G. P.; Gorshkov, V. N.] Los Alamos Natl Lab, CNLS, Los Alamos, NM 87545 USA.
   [Gorshkov, V. N.] Natl Acad Sci Ukraine, Inst Phys, UA-03650 Kiev, Ukraine.
   [Tsifrinovich, V. I.] Polytech Univ, Dept Phys, Metrotech Ctr 6, Brooklyn, NY 11201 USA.
RP Berman, GP (reprint author), Los Alamos Natl Lab, Complex Syst Grp, T-13, Los Alamos, NM 87545 USA.
EM gpb@lanl.gov
RI Gorshkov, Vyacheslav/J-3329-2015
OI Gorshkov, Vyacheslav/0000-0002-7700-5649
NR 9
TC 4
Z9 4
U1 0
U2 1
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 JUL 21
PY 2008
VL 592
IS 3
BP 385
EP 392
DI 10.1016/j.nima.2008.04.024
PG 8
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 334WP
UT WOS:000258252500028
ER

PT J
AU Bleuel, M
   Lang, E
   Gahler, R
   Lal, J
AF Bleuel, M.
   Lang, E.
   Gaehler, R.
   Lal, J.
TI CIM - Compact intensity modulation
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE neutron spin echo; quasi-elastic; adiabatic spin flipper; compact
   intensity modulation
ID NEUTRON SPIN-ECHO; SCATTERING
AB Compact intensity modulation (CIM), a new method to modulate the intensity of a neutron beam is demonstrated. CIM allows the production of arbitrary signals where the focus point can be chosen and changed without any constraints. A novel feature in this technique compared to spin echo techniques is that the neutron polarization is kept parallel or anti-parallel to the static fields during the passage through the magnetic fields and the beating pattern at the detector is produced by an amplitude modulation (AM) of the adiabatic RF-spin flippers rather than Larmor precession like in neutron spin echo (NSE) instruments; thus, the achievable contrast is very high and the instrument resolution can be changed very quickly. This gives the fascinating possibility at pulsed neutron sources to sweep the modulation frequency of the flippers in order to increase dynamic resolution range during the same neutron pulse. Published by Elsevier B.V.
C1 [Bleuel, M.; Lang, E.; Lal, J.] Argonne Natl Lab, Argonne, IL 60439 USA.
   [Gaehler, R.] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France.
RP Bleuel, M (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM mbleuel@anl.gov
NR 7
TC 0
Z9 0
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 JUL 21
PY 2008
VL 592
IS 3
BP 400
EP 404
DI 10.1016/j.nima.2008.04.039
PG 5
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 334WP
UT WOS:000258252500030
ER

PT J
AU Marrs, RE
   Norman, EB
   Burke, JT
   Macri, RA
   Shugart, HA
   Browne, E
   Smith, AR
AF Marrs, R. E.
   Norman, E. B.
   Burke, J. T.
   Macri, R. A.
   Shugart, H. A.
   Browne, E.
   Smith, A. R.
TI Fission-product gamma-ray line pairs sensitive to fissile material and
   neutron energy
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE fission-product gamma-ray spectroscopy; nuclear forensics
ID DEUTERONS; TARGETS; SPECTRA
AB The beta-delayed gamma-ray spectra from the fission of U-235, U-238, and Pu-239 by thermal and near-14-MeV neutrons have been measured for delay times ranging from 1 min to 14 h. Spectra at all delay times contain sets of prominent gamma-ray lines with intensity ratios that identify the fissile material and distinguish between fission induced by low-energy or high-energy neutrons. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Marrs, R. E.; Norman, E. B.; Burke, J. T.; Macri, R. A.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
   [Norman, E. B.] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA.
   [Shugart, H. A.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   [Browne, E.; Smith, A. R.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Marrs, RE (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM marrs1@llnl.gov
NR 8
TC 18
Z9 18
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 JUL 21
PY 2008
VL 592
IS 3
BP 463
EP 471
DI 10.1016/j.nima.2008.04.032
PG 9
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 334WP
UT WOS:000258252500038
ER

PT J
AU Garcia, MA
   Ali, MN
   Chang, NN
   Parsonsmoss, T
   Ashby, PD
   Gates, JM
   Stavsetra, L
   Gregorich, KE
   Nitsche, H
AF Garcia, Mitch A.
   Ali, Mazhar N.
   Chang, Noel N.
   Parsonsmoss, Tashi
   Ashby, Paul D.
   Gates, Jacklyn M.
   Stavsetra, Liv
   Gregorich, Kenneth E.
   Nitsche, Heino
TI Heavy-ion irradiation of thulium(III) oxide targets prepared by
   polymer-assisted deposition
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE target preparation; polymer-assisted deposition; thulium(III) oxide;
   atomic force microscopy
ID THIN; ELECTRODEPOSITION; FILMS; FOILS
AB Thulium(III) oxide (Tm2O3) targets prepared by the polymer-assisted deposition (PAD) method were irradiated by heavy-ion beams to test the method's feasibility for nuclear science applications. Targets were prepared on silicon nitride backings (thickness of 1000 nm, 344 mu g/cm(2)) and were irradiated with an Ar-40 beam at a laboratory frame energy of similar to 210 MeV (50 particle nA). The root mean squared (RMS) roughness prior to irradiation is 1.1 nm for a similar to 250 nm (similar to 220 mu g/cm(2)) TM2O3 target, and an RMS roughness of 2.0 nm after irradiation was measured by atomic force microscopy (AFM). Scanning electron microscopy of the irradiated target reveals no significant differences in surface homogeneity when compared to imaging prior to irradiation. Target flaking was not observed from monitoring Rutherford scattered particles as a function of time. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Garcia, Mitch A.; Ali, Mazhar N.; Chang, Noel N.; Parsonsmoss, Tashi; Gates, Jacklyn M.; Nitsche, Heino] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Garcia, Mitch A.; Ali, Mazhar N.; Chang, Noel N.; Parsonsmoss, Tashi; Ashby, Paul D.; Gates, Jacklyn M.; Stavsetra, Liv; Gregorich, Kenneth E.; Nitsche, Heino] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Garcia, MA (reprint author), Univ Calif Berkeley, Dept Chem, 1925 Delaware St Apt 3C, Berkeley, CA 94720 USA.
EM mitch@berkeley.edu
RI Ali, Mazhar/C-6473-2013
OI Ali, Mazhar/0000-0002-1129-6105
NR 9
TC 3
Z9 3
U1 0
U2 5
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 JUL 21
PY 2008
VL 592
IS 3
BP 483
EP 485
DI 10.1016/j.nima.2008.04.077
PG 3
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 334WP
UT WOS:000258252500041
ER

PT J
AU Zhou, JF
   Koschny, T
   Soukoulis, CM
AF Zhou, Jiangfeng
   Koschny, Thomas
   Soukoulis, Costas M.
TI An efficient way to reduce losses of left-handed metamaterials
SO OPTICS EXPRESS
LA English
DT Article
ID NEGATIVE-INDEX METAMATERIAL; OPTICAL METAMATERIALS; WAVELENGTHS;
   REFRACTION; LIGHT
AB We propose a simple and effective way to reduce the losses in left-handed metamaterials by manipulating the values of the effective parameters R, L, and C. We investigate the role of losses of the short-wire pairs and the fishnet structures. Increasing the effective inductance to capacitance ratio, L/C, reduces the losses and the figure of merit can increase substantially, especially at THz frequencies and in the optical regime. (C) 2008 Optical Society of America.
C1 [Zhou, Jiangfeng; Koschny, Thomas; Soukoulis, Costas M.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
   Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
   [Zhou, Jiangfeng] Iowa State Univ, Dept Elect & Comp Engn, Ames, IA 50011 USA.
   Iowa State Univ, Microelect Res Ctr, Ames, IA 50011 USA.
RP Zhou, JF (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
EM jfengz@iastate.edu
RI Soukoulis, Costas/A-5295-2008; Zhou, Jiangfeng/D-4292-2009
OI Zhou, Jiangfeng/0000-0002-6958-3342
NR 25
TC 59
Z9 59
U1 1
U2 19
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD JUL 21
PY 2008
VL 16
IS 15
BP 11147
EP 11152
DI 10.1364/OE.16.011147
PG 6
WC Optics
SC Optics
GA 332FX
UT WOS:000258069100031
PM 18648429
ER

PT J
AU Acosta, VM
   Auzinsh, M
   Gawlik, W
   Grisins, P
   Higbie, JM
   Kimball, DFJ
   Krzemien, L
   Ledbetter, MP
   Pustelny, S
   Rochester, SM
   Yashchuk, VV
   Budker, D
AF Acosta, V. M.
   Auzinsh, M.
   Gawlik, W.
   Grisins, P.
   Higbie, J. M.
   Kimball, D. F. Jackson
   Krzemien, L.
   Ledbetter, M. P.
   Pustelny, S.
   Rochester, S. M.
   Yashchuk, V. V.
   Budker, D.
TI Production and detection of atomic hexadecapole at Earth's magnetic
   field
SO OPTICS EXPRESS
LA English
DT Article
ID RESONANCE; STATE; LIGHT
AB Optical magnetometers measure magnetic fields with extremely high precision and without cryogenics. However, at geomagnetic fields, important for applications from landmine removal to archaeology, they suffer from nonlinear Zeeman splitting, leading to systematic dependence on sensor orientation. We present experimental results on a method of eliminating this systematic error, using the hexadecapole atomic polarization moment. In particular, we demonstrate selective production of the atomic hexadecapole moment at Earth's magnetic field and verify its immunity to nonlinear Zeeman splitting. This technique promises to eliminate directional errors in all-optical atomic magnetometers, potentially improving their measurement accuracy by several orders of magnitude. (C) 2008 Optical Society of America.
C1 [Acosta, V. M.; Higbie, J. M.; Ledbetter, M. P.; Rochester, S. M.; Budker, D.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   [Auzinsh, M.; Grisins, P.] Latvian State Univ, Dept Phys, LV-1586 Riga, Latvia.
   [Gawlik, W.; Krzemien, L.; Pustelny, S.] Jagiellonian Univ, Ctr Magnetoopt Res, Inst Phys, PL-30059 Krakow, Poland.
   [Kimball, D. F. Jackson] Calif State Univ Hayward, Dept Phys, Hayward, CA 94542 USA.
   [Yashchuk, V. V.] Lawrence Berkeley Natl Lab, Adv Light Source Div, Berkeley, CA 94720 USA.
   [Budker, D.] Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
RP Budker, D (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM budker@berkeley.edu
RI Acosta, Victor/G-8176-2011; Budker, Dmitry/F-7580-2016; 
OI Budker, Dmitry/0000-0002-7356-4814; Acosta, Victor/0000-0003-0058-9954
NR 32
TC 16
Z9 17
U1 3
U2 9
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD JUL 21
PY 2008
VL 16
IS 15
BP 11423
EP 11430
DI 10.1364/OE.16.011423
PG 8
WC Optics
SC Optics
GA 332FX
UT WOS:000258069100064
PM 18648462
ER

PT J
AU Naulleau, PP
   Gullikson, EM
   Aquila, A
   George, S
   Niakoula, D
AF Naulleau, Patrick P.
   Gullikson, Eric M.
   Aquila, Andy
   George, Simi
   Niakoula, Dimitra
TI Absolute sensitivity calibration of extreme ultraviolet photoresists
SO OPTICS EXPRESS
LA English
DT Article
ID EXPOSURE
AB One of the major challenges facing the commercialization of extreme ultraviolet (EUV) lithography remains simultaneously achieving resist sensitivity, line-edge roughness, and resolution requirement. Sensitivity is of particular concern owing to its direct impact on source power requirements. Most current EUV exposure tools have been calibrated against a resist standard with the actual calibration of the standard resist dating back to EUV exposures at Sandia National Laboratories in the mid 1990s. Here we report on an independent sensitivity calibration of two baseline resists from the SEMATECH Berkeley MET tool performed at the Advanced Light Source Calibrations and Standards beamline. The results show the baseline resists to be approximately 1.9 times faster than previously thought based on calibration against the long standing resist standard. (C) 2008 Optical Society of America.
C1 [Naulleau, Patrick P.; Gullikson, Eric M.; Aquila, Andy; George, Simi; Niakoula, Dimitra] Lawrence Berkeley Natl Lab, Ctr Xray Opt, Berkeley, CA 94720 USA.
RP Naulleau, PP (reprint author), Lawrence Berkeley Natl Lab, Ctr Xray Opt, Berkeley, CA 94720 USA.
EM pnaulleau@lbl.gov
NR 11
TC 9
Z9 9
U1 0
U2 0
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD JUL 21
PY 2008
VL 16
IS 15
BP 11519
EP 11524
DI 10.1364/OE.16.011519
PG 6
WC Optics
SC Optics
GA 332FX
UT WOS:000258069100075
PM 18648473
ER

PT J
AU Whalen, D
   van Veelen, B
   O'Shea, BW
   Norman, ML
AF Whalen, Daniel
   van Veelen, Bob
   O'Shea, Brian W.
   Norman, Michael L.
TI The destruction of cosmological minihalos by primordial supernovae
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE cosmology : theory; early universe; hydrodynamics; stars : early-type;
   supernovae : individual
ID GLOBULAR STAR-CLUSTERS; RAY BURST AFTERGLOW; POPULATION-III;
   HII-REGIONS; EARLY UNIVERSE; 1ST STARS; INTERGALACTIC MEDIUM;
   INTERSTELLAR-MEDIUM; RADIATIVE FEEDBACK; IONIZATION FRONTS
AB We present numerical simulations of primordial supernovae in cosmological minihalos at z similar to 20. We consider Type II supernovae, hypernovae, and pair instability supernovae ( PISN) in halos from 6: 9; 105 to 1: 2; 107 M-circle dot, those in which Population III stars are expected to form via H-2 cooling. Our simulations are the first to follow the evolution of the blast from a free expansion on spatial scales of 10(-4) pc until its approach to pressure equilibrium in the relic H II region of the progenitor, similar to 1000 pc. Supernovae in H II regions first expand adiabatically and then radiate strongly upon collision with baryons ejected from the halo during its photoevaporation by the progenitor. In contrast to previous findings, supernovae in neutral halos promptly emit most of their kinetic energy as X-rays, but retain enough momentum to seriously disrupt the halo. Explosions in H II regions escape into the IGM, but neutral halos confine the blast and its metals. InH II regions, a prompt second generation of stars may form in the remnant at radii of 100-200 pc. Explosions confined by massive halos instead recollapse, with infall rates in excess of 10(-2) M-circle dot yr(-1) that heavily contaminate their interior. This fallback may either fuel massive black hole growth at very high redshifts or create the first globular clusters with radii of 10-20 pc at the center of the halo. Our findings suggest that the first primitive galaxiesmay therefore have formed sooner, with greater numbers of stars and distinct chemical signatures, than in current models.
C1 [Whalen, Daniel; O'Shea, Brian W.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Whalen, Daniel; Norman, Michael L.] Univ Calif San Diego, Ctr Astrophys & Space Sci, La Jolla, CA 92093 USA.
   [van Veelen, Bob] Astron Inst, Utrecht, Netherlands.
RP Whalen, D (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM dwhalen@lanl.gov
NR 81
TC 101
Z9 101
U1 0
U2 9
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JUL 20
PY 2008
VL 682
IS 1
BP 49
EP 67
DI 10.1086/589643
PG 19
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 328YL
UT WOS:000257834000005
ER

PT J
AU Dilday, B
   Kessler, R
   Frieman, JA
   Holtzman, J
   Marriner, J
   Miknaitis, G
   Nichol, RC
   Romani, R
   Sako, M
   Bassett, B
   Becker, A
   Cinabro, D
   DeJongh, F
   Depoy, DL
   Doi, M
   Garnavich, PM
   Hogan, CJ
   Jha, S
   Konishi, K
   Lampeitl, H
   Marshall, JL
   McGinnis, D
   Prieto, JL
   Riess, AG
   Richmond, MW
   Schneider, DP
   Smith, M
   Takanashi, N
   Tokita, K
   van der Heyden, K
   Yasuda, N
   Zheng, C
   Barentine, J
   Brewington, H
   Choi, C
   Crotts, A
   Dembicky, J
   Harvanek, M
   Im, M
   Ketzeback, W
   Kleinman, SJ
   Krzesinski, J
   Long, DC
   Malanushenko, E
   Malanushenko, V
   McMillan, RJ
   Nitta, A
   Pan, K
   Saurage, G
   Snedden, SA
   Watters, S
   Wheeler, JC
   York, D
AF Dilday, Benjamin
   Kessler, Richard
   Frieman, Joshua A.
   Holtzman, Jon
   Marriner, John
   Miknaitis, Gajus
   Nichol, Robert C.
   Romani, Roger
   Sako, Masao
   Bassett, Bruce
   Becker, Andrew
   Cinabro, David
   DeJongh, Fritz
   Depoy, Darren L.
   Doi, Mamoru
   Garnavich, Peter M.
   Hogan, Craig J.
   Jha, Saurabh
   Konishi, Kohki
   Lampeitl, Hubert
   Marshall, Jennifer L.
   McGinnis, David
   Prieto, Jose Luis
   Riess, Adam G.
   Richmond, Michael W.
   Schneider, Donald P.
   Smith, Mathew
   Takanashi, Naohiro
   Tokita, Kouichi
   van der Heyden, Kurt
   Yasuda, Naoki
   Zheng, Chen
   Barentine, John
   Brewington, Howard
   Choi, Changsu
   Crotts, Arlin
   Dembicky, Jack
   Harvanek, Michael
   Im, Myunshin
   Ketzeback, William
   Kleinman, Scott J.
   Krzesinski, Jurek
   Long, Daniel C.
   Malanushenko, Elena
   Malanushenko, Viktor
   McMillan, Russet J.
   Nitta, Atsuko
   Pan, Kaike
   Saurage, Gabrelle
   Snedden, Stephanie A.
   Watters, Shannon
   Wheeler, J. Craig
   York, Donald
TI A measurement of the rate of Type Ia supernovae at redshift z
   approximate to 0.1 from the first season of the SDSS-II Supernova Survey
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE supernovae : general
ID DIGITAL SKY SURVEY; SURVEY PHOTOMETRIC SYSTEM; STAR-FORMATION HISTORY;
   LIGHT-CURVE SHAPES; DATA RELEASE; DEEP FIELD; SEARCH; EXTINCTION;
   TELESCOPE; GALAXIES
C1 [Dilday, Benjamin] Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
   [Dilday, Benjamin; Kessler, Richard; Frieman, Joshua A.] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
   [Kessler, Richard; York, Donald] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
   [Frieman, Joshua A.; York, Donald] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
   [Frieman, Joshua A.; Marriner, John; Miknaitis, Gajus; DeJongh, Fritz; McGinnis, David] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
   [Holtzman, Jon] New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA.
   [Nichol, Robert C.; Lampeitl, Hubert; Smith, Mathew] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 2EG, Hants, England.
   [Romani, Roger; Sako, Masao; Jha, Saurabh; Zheng, Chen] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA.
   [Sako, Masao] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA.
   [Bassett, Bruce] Univ Cape Town, Dept Math & Appl Math, ZA-7701 Rondebosch, South Africa.
   [Bassett, Bruce; van der Heyden, Kurt] S African Astron Observ, ZA-7935 Cape Town, South Africa.
   [Becker, Andrew; Hogan, Craig J.] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
   [Cinabro, David] Wayne State Univ, Dept Phys, Detroit, MI 48202 USA.
   [Depoy, Darren L.; Marshall, Jennifer L.; Prieto, Jose Luis] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
   [Doi, Mamoru; Takanashi, Naohiro; Tokita, Kouichi] Univ Tokyo, Inst Astron, Grad Sch Sci, Tokyo 1810015, Japan.
   [Garnavich, Peter M.] Univ Notre Dame, Notre Dame, IN 46556 USA.
   [Jha, Saurabh] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
   [Konishi, Kohki; Yasuda, Naoki] Univ Tokyo, Inst Cosm Ray Res, Chiba 2778582, Japan.
   [Lampeitl, Hubert; Riess, Adam G.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
   [Riess, Adam G.] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
   [Richmond, Michael W.] Rochester Inst Technol, Dept Phys, Rochester, NY 14623 USA.
   [Schneider, Donald P.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
   [van der Heyden, Kurt] Univ Cape Town, Dept Astron, ZA-7700 Rondebosch, South Africa.
   [Barentine, John; Wheeler, J. Craig] Univ Texas Austin, McDonald Observ, Dept Astron, Austin, TX 78712 USA.
   [Barentine, John; Brewington, Howard; Dembicky, Jack; Harvanek, Michael; Ketzeback, William; Kleinman, Scott J.; Krzesinski, Jurek; Long, Daniel C.; Malanushenko, Elena; Malanushenko, Viktor; McMillan, Russet J.; Nitta, Atsuko; Pan, Kaike; Saurage, Gabrelle; Snedden, Stephanie A.; Watters, Shannon] Apache Point Observ, Sunspot, NM 88349 USA.
   [Choi, Changsu; Im, Myunshin] Seoul Natl Univ, Dept Astron, Seoul, South Korea.
   [Crotts, Arlin] Columbia Univ, Dept Astron, New York, NY 10027 USA.
   [Harvanek, Michael] Lowell Observ, Flagstaff, AZ 86001 USA.
   [Kleinman, Scott J.] Natl Inst Nat Sci, Natl Astron Observ Japan, Subaru Telescope, Hilo, HI 96720 USA.
   [Krzesinski, Jurek] Akad Pedagogicazna Krakowie, Obserwatorium Astron Suhorze, PL-30084 Krakow, Poland.
   [Nitta, Atsuko] Gemini Observ, Hilo, HI 96720 USA.
RP Dilday, B (reprint author), Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
EM bdilday@uchicago.edu
RI Yasuda, Naoki/A-4355-2011; Im, Myungshin/B-3436-2013
OI Im, Myungshin/0000-0002-8537-6714
NR 70
TC 69
Z9 69
U1 0
U2 8
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JUL 20
PY 2008
VL 682
IS 1
BP 262
EP 282
DI 10.1086/587733
PG 21
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 328YL
UT WOS:000257834000022
ER

PT J
AU Belczynski, K
   Taam, RE
   Rantsiou, E
   van der Sluys, M
AF Belczynski, Krzysztof
   Taam, Ronald E.
   Rantsiou, Emmanouela
   van der Sluys, Marc
TI Black hole spin evolution: Implications for short-hard gamma-ray bursts
   and gravitational wave detection
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE binaries : close; black hole physics; gamma rays : bursts; gravitational
   waves
ID NEUTRON STAR BINARIES; 2 COMPACT OBJECTS; POPULATION SYNTHESIS; ORBIT
   MISALIGNMENT; ACCRETION DISKS; MERGERS; SIMULATIONS; MASS; PROGENITORS;
   UNIVERSE
AB The evolution of the spin and tilt of black holes in compact black hole-neutron star and black hole-black hole binary systems is investigated within the framework of the coalescing compact star binary model for short gamma ray bursts via the population synthesis method. Based on recent results on accretion at super critical rates in slim disk models, estimates of natal kicks, and the results regarding fallback in supernova models, we obtain the black hole spin and misalignment. It is found that the spin parameter, a(spin), is less than 0.5 for initially nonrotating black holes and the tilt angle, i(tilt), is less than 45 degrees for 50% of the systems in black hole-neutron star binaries. On comparison with the results of black hole-neutron star merger calculations we estimate that only a small fraction (similar to 0.01) of these systems can lead to the formation of a torus surrounding the coalesced binary potentially producing a short-hard gamma ray burst. On the other hand, for high initial black hole spin parameters (a(spin) > 0.6) this fraction can be significant (similar to 0.4). It is found that the predicted gravitational radiation signal for our simulated population does not significantly differ from that for nonrotating black holes. Due to the (1) insensitivity of signal detection techniques to the black hole spin and the (2) predicted overall low contribution of black hole binaries to the signal we find that the detection of gravitational waves are not greatly inhibited by current searches with nonspinning templates. It is pointed out that the detection of a black hole-black hole binary inspiral system with LIGO or VIRGO may provide a direct measurement of the initial spin of a black hole.
C1 [Belczynski, Krzysztof] Los Alamos Natl Lab, CCS2 ISR1 Grp, Los Alamos, NM 87545 USA.
   [Belczynski, Krzysztof] New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA.
   [Taam, Ronald E.; Rantsiou, Emmanouela; van der Sluys, Marc] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
   [Taam, Ronald E.] Natl Tsing Hua Univ, TIARA, ASIAA, Hsinchu, Taiwan.
RP Belczynski, K (reprint author), Los Alamos Natl Lab, CCS2 ISR1 Grp, POB 1663,MS D466, Los Alamos, NM 87545 USA.
EM kbelczyn@nmsu.edu; r-taam@northwestern.edu; emmanouela@northwestern.edu;
   sluys@northwestern.edu
NR 64
TC 58
Z9 58
U1 0
U2 3
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JUL 20
PY 2008
VL 682
IS 1
BP 474
EP 486
DI 10.1086/589609
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 328YL
UT WOS:000257834000037
ER

PT J
AU Becker, AC
   Arraki, K
   Kaib, NA
   Wood-Vasey, WM
   Aguilera, C
   Blackman, JW
   Blondin, S
   Challis, P
   Clocchiatti, A
   Covarrubias, R
   Damke, G
   Davis, TM
   Filippenko, AV
   Foley, RJ
   Garg, A
   Garnavich, PM
   Hicken, M
   Jha, S
   Kirshner, RP
   Krisciunas, K
   Leibundgut, B
   Li, W
   Matheson, T
   Miceli, A
   Miknaitis, G
   Narayan, G
   Pignata, G
   Prieto, JL
   Rest, A
   Riess, AG
   Salvo, ME
   Schmidt, BP
   Smith, RC
   Sollerman, J
   Spyromilio, J
   Stubbs, CW
   Suntzeff, NB
   Tonry, JL
   Zenteno, A
AF Becker, A. C.
   Arraki, K.
   Kaib, N. A.
   Wood-Vasey, W. M.
   Aguilera, C.
   Blackman, J. W.
   Blondin, S.
   Challis, P.
   Clocchiatti, A.
   Covarrubias, R.
   Damke, G.
   Davis, T. M.
   Filippenko, A. V.
   Foley, R. J.
   Garg, A.
   Garnavich, P. M.
   Hicken, M.
   Jha, S.
   Kirshner, R. P.
   Krisciunas, K.
   Leibundgut, B.
   Li, W.
   Matheson, T.
   Miceli, A.
   Miknaitis, G.
   Narayan, G.
   Pignata, G.
   Prieto, J. L.
   Rest, A.
   Riess, A. G.
   Salvo, M. E.
   Schmidt, B. P.
   Smith, R. C.
   Sollerman, J.
   Spyromilio, J.
   Stubbs, C. W.
   Suntzeff, N. B.
   Tonry, J. L.
   Zenteno, A.
TI Exploring the outer solar system with the ESSENCE Supernova Survey
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE kuiper belt; methods : data analysis; surveys
ID TRANS-NEPTUNIAN OBJECTS; COSMOLOGICAL CONSTANT; BELT; ORIGIN
AB We report the discovery and orbital determination of 14 trans-Neptunian objects (TNOs) from the ESSENCE Supernova Survey difference imaging data set. Two additional objects discovered in a similar search of the SDSS-II Supernova Survey database were recovered in this effort. ESSENCE repeatedly observed fields far from the solar system ecliptic (-21 degrees < beta < -5 degrees), reaching limiting magnitudes per observation of I approximate to 23.1 R approximate to 23.7. We examine several of the newly detected objects in detail, including 2003 UC414, which orbits entirely 23.7 between Uranus and Neptune and lies very close to a dynamical region that would make it stable for the lifetime of the solar system. 2003 SS422 and 2007 TA(418) have high eccentricities and large perihelia, making them candidate members of an outer class of TNOs. We also report a new member of the "extended" or "detached" scattered disk, 2004 VN112, and verify the stability of its orbit using numerical simulations. This object would have been visible to ESSENCE for only similar to 2% of its orbit, suggesting a vast number of similar objects across the sky. We emphasize that off-ecliptic surveys are optimal for uncovering the diversity of such objects, which in turn will constrain the history of gravitational influences that shaped our early solar system.
C1 [Becker, A. C.; Arraki, K.; Kaib, N. A.; Miceli, A.] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
   [Wood-Vasey, W. M.; Blondin, S.; Challis, P.; Garg, A.; Hicken, M.; Kirshner, R. P.; Narayan, G.; Stubbs, C. W.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
   [Aguilera, C.; Damke, G.; Rest, A.; Smith, R. C.; Suntzeff, N. B.; Zenteno, A.] Natl Opt Astron Observ, CTIO, La Serena, Chile.
   [Blackman, J. W.; Salvo, M. E.; Schmidt, B. P.] Australian Natl Univ, Res Sch Astron & Astrophys, Mt Stromlo & Siding Spring Observ, Weston, Australia.
   [Clocchiatti, A.] Pontificia Univ Catolica Chile, Dept Astron & Astrophys, Santiago 22, Chile.
   [Covarrubias, R.] Observ Carnegie Inst Washington, Pasadena, CA 91101 USA.
   [Davis, T. M.] Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen O, Denmark.
   [Davis, T. M.] Univ Queensland, Dept Phys, Brisbane, Qld 4072, Australia.
   [Filippenko, A. V.; Foley, R. J.; Li, W.] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA.
   [Garg, A.; Hicken, M.; Jha, S.; Narayan, G.; Rest, A.; Stubbs, C. W.] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
   [Garnavich, P. M.; Krisciunas, K.] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
   [Jha, S.] Stanford Linear Accelerator Ctr, Kavli Inst Particle Astrophys & Cosmol, Menlo Pk, CA 94025 USA.
   [Krisciunas, K.; Suntzeff, N. B.] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA.
   [Leibundgut, B.; Spyromilio, J.] European So Observ, D-85748 Garching, Germany.
   [Matheson, T.] Natl Opt Astron Observ, Tucson, AZ 85719 USA.
   [Miknaitis, G.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   [Pignata, G.] Univ Chile, Dept Astron, Santiago, Chile.
   [Prieto, J. L.] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
   [Riess, A. G.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
   [Tonry, J. L.] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.
RP Becker, AC (reprint author), Univ Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA.
RI Stubbs, Christopher/C-2829-2012; Davis, Tamara/A-4280-2008; 
OI Stubbs, Christopher/0000-0003-0347-1724; Davis,
   Tamara/0000-0002-4213-8783; Schmidt, Brian/0000-0001-6589-1287;
   Sollerman, Jesper/0000-0003-1546-6615; Narayan,
   Gautham/0000-0001-6022-0484
NR 22
TC 6
Z9 7
U1 1
U2 2
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD JUL 20
PY 2008
VL 682
IS 1
BP L53
EP L56
DI 10.1086/590429
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 326MF
UT WOS:000257662700014
ER

PT J
AU Carlberg, RG
   Sullivan, M
   Le Borgne, D
   Conley, A
   Howell, DA
   Perrett, K
   Astier, P
   Balam, D
   Balland, C
   Basa, S
   Hardin, D
   Fouchez, D
   Guy, J
   Hook, I
   Pain, R
   Pritchet, CJ
   Regnault, N
   Rich, J
   Perlmutter, S
AF Carlberg, R. G.
   Sullivan, M.
   Le Borgne, D.
   Conley, A.
   Howell, D. A.
   Perrett, K.
   Astier, P.
   Balam, D.
   Balland, C.
   Basa, S.
   Hardin, D.
   Fouchez, D.
   Guy, J.
   Hook, I.
   Pain, R.
   Pritchet, C. J.
   Regnault, N.
   Rich, J.
   Perlmutter, S.
TI Clustering of supernova Ia host galaxies
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE galaxies : general; surveys
ID EVOLUTIONARY SYNTHESIS; STAR-FORMATION; LEGACY SURVEY; FREQUENCY; RATES;
   REDSHIFT; PEGASE
AB For the first time the cross-correlation between Type Ia supernova host galaxies and surrounding field galaxies is measured using the Supernova Legacy Survey sample. Over the redshift range we find that z = 0.2-0.9 supernova hosts are correlated an average of 60% more strongly than similarly selected field galaxies over the 3"-100" range and about a factor of 3 more strongly below 10". The correlation errors are empirically established 10 with a jackknife analysis of the four SNLS fields. The hosts are more correlated than the field at a significance of 99% in the fitted amplitude and slope, with the point-by-point difference of the two correlation functions having a reduced chi(2) for 8 degrees of freedom of 4.3, which has a probability of random occurrence of less than 3 x 10(-5). The correlation angle is 1.5" +/- 0.5", which deprojects to a fixed comoving correlation length of approximately 6.5 +/- 2 h(-1) Mpc. Weighting the field galaxies with the mass and star formation rate supernova frequencies of the simple model produces good agreement with the observed clustering. We conclude that A + B these supernova clustering differences are primarily the expected outcome of the dependence of supernova rates on galaxy masses and stellar populations with their clustering environment.
C1 [Carlberg, R. G.; Sullivan, M.; Conley, A.; Howell, D. A.; Perrett, K.] Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada.
   [Sullivan, M.; Hook, I.] Univ Oxford Astrophys, Oxford OX1 3RH, England.
   [Le Borgne, D.; Rich, J.] CEA Saclay, DSM IRFU, F-91191 Gif Sur Yvette, France.
   [Astier, P.; Balland, C.; Hardin, D.; Fouchez, D.; Guy, J.; Pain, R.; Regnault, N.] Univ Paris 06, F-75005 Paris, France.
   [Astier, P.; Balland, C.; Hardin, D.; Fouchez, D.; Guy, J.; Pain, R.; Regnault, N.] Univ Paris 07, F-75005 Paris, France.
   [Astier, P.; Balland, C.; Hardin, D.; Fouchez, D.; Guy, J.; Pain, R.; Regnault, N.] CNRS, IN2P3, LPNHE, F-75005 Paris, France.
   [Balam, D.; Pritchet, C. J.] Univ Victoria, Dept Phys & Astron, Victoria, BC V8W 3P6, Canada.
   [Basa, S.] LAM CNRS, F-13376 Marseille 12, France.
   [Perlmutter, S.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Carlberg, RG (reprint author), Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada.
EM carlberg@astro.utoronto.ca
RI Carlberg, Raymond/I-6947-2012; Perlmutter, Saul/I-3505-2015; 
OI Carlberg, Raymond/0000-0002-7667-0081; Perlmutter,
   Saul/0000-0002-4436-4661; Sullivan, Mark/0000-0001-9053-4820
NR 20
TC 5
Z9 5
U1 0
U2 1
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD JUL 20
PY 2008
VL 682
IS 1
BP L25
EP L28
DI 10.1086/590182
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 326MF
UT WOS:000257662700007
ER

PT J
AU Disselkamp, RS
   Harris, BD
   Hart, TR
AF Disselkamp, R. S.
   Harris, B. D.
   Hart, T. R.
TI Hydroxy acetone and lactic acid synthesis from aqueous propylene
   glycol/hydrogen peroxide catalysis on Pd-black
SO CATALYSIS COMMUNICATIONS
LA English
DT Article
DE propylene glycol; hydrogen peroxide; hydroxy acetone; lactic acid;
   enol-diol; Pd-black catalyst
ID LIQUID-PHASE OXIDATION; SELECTIVE OXIDATION; SYSTEM; ALCOHOLS; WATER
AB Here we report the reaction of propylene. glycol with hydrogen peroxide/air sparging on a Pd-black catalyst under reflux conditions at 368 K. Major products include hydroxy acetone (HA) and acetic acid (AA) compounds, whereas a lesser abundant compound formed was lactic acid (LA). Product conversion data at near neutral pH versus hydrogen peroxide equivalents added is presented. Experiments revealed that although the product distribution in air sparged versus non-air sparged chemistries is similar, the amount of reactive oxygen is greatly enhanced (similar to 8-fold) with co-addition of O-2/H2O2. Additional studies have revealed the amount of LA formed can be enhanced under mildly acidic conditions such that 26% of total product formation is LA. Published by Elsevier B.V.
C1 [Disselkamp, R. S.; Harris, B. D.; Hart, T. R.] Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA.
RP Disselkamp, RS (reprint author), Pacific NW Natl Lab, Inst Interfacial Catalysis, 3335 Q Ave, Richland, WA 99352 USA.
EM rdisselkamp@columbiabasin.edu
OI Hart, Todd/0000-0001-8013-0689
NR 16
TC 3
Z9 3
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1566-7367
J9 CATAL COMMUN
JI Catal. Commun.
PD JUL 20
PY 2008
VL 9
IS 13
BP 2250
EP 2252
DI 10.1016/j.catcom.2008.05.005
PG 3
WC Chemistry, Physical
SC Chemistry
GA 330WN
UT WOS:000257973600024
ER

PT J
AU Nordlund, D
   Odelius, M
   Bluhm, H
   Ogasawara, H
   Pettersson, LGM
   Nilsson, A
AF Nordlund, D.
   Odelius, M.
   Bluhm, H.
   Ogasawara, H.
   Pettersson, L. G. M.
   Nilsson, A.
TI Electronic structure effects in liquid water studied by photoelectron
   spectroscopy and density functional theory
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID MOLECULAR-DYNAMICS; INTERMOLECULAR INTERACTIONS; AQUEOUS-SOLUTIONS;
   HYDROGEN-BOND; CUBIC ICE; PHOTOEMISSION; PSEUDOPOTENTIALS;
   NONADDITIVITY; APPROXIMATION; CLUSTERS
AB We present valence photoelectron emission spectra of liquid water in comparison with gas-phase water, ice close to the melting point, low temperature amorphous and crystalline ice. All aggregation states have major electronic structure changes relative to the free molecule, with rehybridization and development of bonding and anti-bonding states accompanying the hydrogen bond formation. Sensitivity to the local structural order, most prominent in the shape and splitting of the occupied 3a(1) orbital, is understood from the electronic structure averaging over various geometrical structures, and reflects the local nature of the orbital interaction. (C) 2008 Elsevier B. V. All rights reserved.
C1 [Nordlund, D.; Ogasawara, H.; Nilsson, A.] Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
   [Nordlund, D.; Odelius, M.; Pettersson, L. G. M.; Nilsson, A.] Stockholm Univ, AlbaNova Univ Ctr, FYSIKUM, S-10691 Stockholm, Sweden.
   [Bluhm, H.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Nordlund, D (reprint author), Stanford Synchrotron Radiat Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
EM work@dennisnordlund.com; nilsson@slac.stanford.edu
RI Nilsson, Anders/E-1943-2011; Pettersson, Lars/F-8428-2011; Nordlund,
   Dennis/A-8902-2008; Pettersson, Lars/J-4925-2013; Odelius,
   Michael/A-7628-2014; Ogasawara, Hirohito/D-2105-2009
OI Nilsson, Anders/0000-0003-1968-8696; Nordlund,
   Dennis/0000-0001-9524-6908; Pettersson, Lars/0000-0003-1133-9934;
   Odelius, Michael/0000-0002-7023-2486; Ogasawara,
   Hirohito/0000-0001-5338-1079
NR 49
TC 43
Z9 44
U1 4
U2 24
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD JUL 20
PY 2008
VL 460
IS 1-3
BP 86
EP 92
DI 10.1016/j.cplett.2008.04.096
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 325NT
UT WOS:000257596300019
ER

PT J
AU Papoular, RJ
   Toby, BH
   Davydov, VA
   Rakhmanina, AV
   Dzyabchenko, A
   Allouchi, H
   Agafonov, V
AF Papoular, R. J.
   Toby, B. H.
   Davydov, V. A.
   Rakhmanina, A. V.
   Dzyabchenko, A.
   Allouchi, H.
   Agafonov, V.
TI Single-crystal and synchrotron X-ray powder diffraction study of the
   one-dimensional orthorhombic polymer phase of C(60)
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID HIGH-PRESSURE; STRUCTURAL REFINEMENT; SOLID C-60; TRANSITIONS; CS; RB
AB The 1D-orthorhombic polymer phase of C(60) was originally mentioned in 1995. The present work provides the first direct experimental quantitative evidences of the 1D-polymer chains, clearly seen by single-crystal diffraction. Geometrical details of the [2+2]-cycloaddition rings are compared with those of C(60) dimers and 2D-polymers. Another key structural parameter is the angle of rotation Psi of the 1D chains about the polymerization axis. Single-crystal diffraction yields Psi approximate to 78 degrees, whereas accurate synchrotron powder diffraction independently produces a similar Psi approximate to 73 degrees. These values are in qualitative agreement with a former theoretical prediction (Psi approximate to 61 degrees). (C) 2008 Elsevier B. V. All rights reserved.
C1 [Papoular, R. J.] CEA, CEN Saclay, IRAMIS, Leon Brillouin Lab, F-91191 Gif Sur Yvette, France.
   [Toby, B. H.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
   [Davydov, V. A.; Rakhmanina, A. V.] Russian Acad Sci, Vereshchagin Inst High Pressure Phys, Troitsk 142092, Russia.
   [Dzyabchenko, A.] LY Karpov Phys Chem Res Inst, Moscow 103064, Russia.
   [Allouchi, H.] Univ Tours, EA 3857, Lab Synth Physicochim & Therapeut, F-37200 Tours, France.
   [Agafonov, V.] Univ Tours, CNRS, UMR CEA 6157, Lab Electrodynam Mat Avances, F-37200 Tours, France.
RP Papoular, RJ (reprint author), CEA, CEN Saclay, IRAMIS, Leon Brillouin Lab, F-91191 Gif Sur Yvette, France.
EM papou@llb.saclay.cea.fr
RI Toby, Brian/F-3176-2013; Davydov, Valery/P-5673-2015
OI Toby, Brian/0000-0001-8793-8285; Davydov, Valery/0000-0002-8702-0340
NR 29
TC 2
Z9 2
U1 2
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD JUL 20
PY 2008
VL 460
IS 1-3
BP 93
EP 99
DI 10.1016/j.cplett.2008.05.046
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 325NT
UT WOS:000257596300020
ER

PT J
AU Zhao, X
   Rignall, TR
   McCabe, C
   Adney, WS
   Himmel, ME
AF Zhao, Xiongce
   Rignall, Tauna R.
   McCabe, Clare
   Adney, William S.
   Himmel, Michael E.
TI Molecular simulation evidence for processive motion of Trichoderma
   reesei Cel7A during cellulose depolymerization
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID CELLOBIOHYDROLASE-I; CRYSTAL-STRUCTURE; FORCE-FIELD; FREE-ENERGY; X-RAY;
   DYNAMICS; BIOFUELS; SYSTEM; LINKER; DOMAIN
AB We present free energy calculations for the Trichoderma reesei Cel7A (cellobiohydrolase I) linker peptide from molecular dynamics simulations directed towards understanding the linker role in cellulose hydrolysis. The calculations predict an energy storage mechanism of the linker under stretching/compression that is consistent with processive depolymerization. The linker exhibits two stable states at lengths of 2.5 nm and 5.5 nm during extension/compression, with a free energy difference of 10.5 kcal/mol between the two states separated by an energy barrier. The switching between stable states supports the hypothesis that the linker peptide has the capacity to store energy in a manner similar to a spring. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Rignall, Tauna R.; McCabe, Clare] Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA.
   [Zhao, Xiongce] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
   [Adney, William S.; Himmel, Michael E.] Natl Renewable Energy Lab, Chem & Biosci Ctr, Golden, CO USA.
RP McCabe, C (reprint author), Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA.
EM c.mccabe@vanderbilt.edu
RI McCabe, Clare/I-8017-2012
OI McCabe, Clare/0000-0002-8552-9135
NR 26
TC 21
Z9 21
U1 0
U2 15
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD JUL 20
PY 2008
VL 460
IS 1-3
BP 284
EP 288
DI 10.1016/j.cplett.2008.05.060
PG 5
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 325NT
UT WOS:000257596300058
ER

PT J
AU Colella, P
   Sekora, MD
AF Colella, Phillip
   Sekora, Michael D.
TI A limiter for PPM that preserves accuracy at smooth extrema
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE upwind methods; PPM; limiters
ID ESSENTIALLY NONOSCILLATORY SCHEMES; FLUX-CORRECTED TRANSPORT;
   CONSERVATION-LAWS; ALGORITHMS
AB We present a new limiter for the PPM method of Colella and Woodward [P. Colella, P.R. Woodward, The Piecewise Parabolic Method (PPM) for gas-dynamical simulations, Journal of Computational Physics 54 (1984) 174-201] that preserves accuracy at smooth extrema. It is based on constraining the interpolated values at extrema (and only at extrema) using non-linear combinations of various difference approximations of the second derivatives. Otherwise, we use a standard geometric limiter to preserve monotonicity away from extrema. This leads to a method that has the same accuracy for smooth initial data as the underlying PPM method without limiting, while providing sharp, non-oscillatory representations of discontinuities. (c) 2008 Published by Elsevier Inc.
C1 [Colella, Phillip] Univ Calif Berkeley, Lawrence Berkeley Lab, Appl Numer Algorithms Grp, Berkeley, CA 94720 USA.
   [Sekora, Michael D.] Princeton Univ, Program Appl & Computat Math, Princeton, NJ 08540 USA.
RP Colella, P (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Appl Numer Algorithms Grp, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM pcolella@lbl.gov; sekora@math.princeton.edu
NR 17
TC 52
Z9 53
U1 1
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 JUL 20
PY 2008
VL 227
IS 15
BP 7069
EP 7076
DI 10.1016/j.jcp.2008.03.034
PG 8
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 329MJ
UT WOS:000257871400001
ER

PT J
AU Vomel, C
   Tomov, SZ
   Marques, OA
   Canning, A
   Wang, LW
   Dongarra, JJ
AF Voemel, Christof
   Tomov, Stanimire Z.
   Marques, Osni A.
   Canning, A.
   Wang, Lin-Wang
   Dongarra, Jack J.
TI State-of-the-art eigensolvers for electronic structure calculations of
   large scale nano-systems
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE computational nano-technology; electronic structure; preconditioned
   conjugate gradients; implicitly restarted Arnoldi; Davidson's method
ID OPTIMAL PRECONDITIONED METHODS; EIGENVALUE PROBLEMS; CONVERGENCE
   ACCELERATION; HERMITIAN EIGENPROBLEMS; DAVIDSON METHOD; LIMITED MEMORY;
   ITERATION; MATRICES; EIGENVECTORS; SEEKING
AB The band edge states determine optical and electronic properties of semiconductor nano-structures which can be computed from an interior eigenproblem. We study the reliability and performance of state-of-the-art iterative eigensolvers on large quantum dots and wires, focusing on variants of preconditioned CG, Lanczos, and Davidson methods. One Davidson variant, the GD + k (Olsen) method, is identified to be as reliable as the commonly used preconditioned CG while consistently being between two and three times faster. (c) Published by Elsevier Inc.
C1 [Voemel, Christof; Marques, Osni A.; Canning, A.; Wang, Lin-Wang] Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA.
   [Tomov, Stanimire Z.; Dongarra, Jack J.] Univ Tennessee, Dept Comp Sci, Knoxville, TN 37996 USA.
RP Vomel, C (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA.
EM cvoemel@lbl.gov; tomov@cs.utk.edu; OAMarques@lbl.gov; OAMarques@lbl.gov;
   LWWang@lbl.gov; dongarra@cs.utk.edu
RI Dongarra, Jack/E-3987-2014
NR 47
TC 14
Z9 14
U1 1
U2 12
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 JUL 20
PY 2008
VL 227
IS 15
BP 7113
EP 7124
DI 10.1016/j.jcp.2008.01.018
PG 12
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 329MJ
UT WOS:000257871400005
ER

PT J
AU Xiong, Z
   Cohen, RH
   Rognlien, TD
   Xu, XQ
AF Xiong, Z.
   Cohen, R. H.
   Rognlien, T. D.
   Xu, X. Q.
TI A high-order finite-volume algorithm for Fokker-Planck collisions in
   magnetized plasmas
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE Fokker-Planck collisions; high-order scheme; finite volume;
   constants-of-motion coordinates
ID DIFFERENCE SCHEME; LANDAU EQUATION; IMPLICIT; OPERATOR
AB A high-order finite-volume algorithm is developed for the Fokker-Planck Operator (FPO) describing Coulomb collisions in strongly magnetized plasmas. The algorithm uses a generic fourth-order reconstruction scheme on an unstructured grid in the velocity space spanned by parallel velocity and magnetic moment. By analytically mapping between different coordinates, it produces an accurate and density-conserving numerical FPO for an arbitrary choice of velocity space coordinates. A linearized FPO in constants-of-motion coordinates is implemented as an example of the present algorithm combined with a cut-cell merging procedure. Numerical tests include the thermalization of a test distribution with a background Maxwellian at a different temperature, and the return to isotropy for a distribution initialized with a velocity space loss-cone. Utilization of the method for a nonlinear FPO is straightforward but requires evaluation of the Trubnikov-Rosenbluth potentials. (c) 2008 Elsevier Inc. All rights reserved.
C1 [Xiong, Z.; Cohen, R. H.; Rognlien, T. D.; Xu, X. Q.] Lawrence Livermore Natl Lab, Fus Energy Program Livermore, Livermore, CA 94550 USA.
RP Xiong, Z (reprint author), Schlumberger Sugar Land Technol Ctr, Sugar Land, TX 77478 USA.
EM zxiong@gmail.com
NR 16
TC 10
Z9 10
U1 3
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 JUL 20
PY 2008
VL 227
IS 15
BP 7192
EP 7205
DI 10.1016/j.jcp.2008.04.004
PG 14
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 329MJ
UT WOS:000257871400009
ER

PT J
AU Li, ST
AF Li, Shengtai
TI High order central scheme on overlapping cells for magneto-hydrodynamic
   flows with and without constrained transport method
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE central schemes; high order; non-oscillatory; constrained transport
   (CT); divergence-free reconstruction; overlapping cell;
   magneto-hydrodynamics (MHD)
ID NONOSCILLATORY CENTRAL SCHEMES; HYPERBOLIC CONSERVATION-LAWS;
   FINITE-DIFFERENCE SCHEME; IDEAL MAGNETOHYDRODYNAMICS; MHD EQUATIONS;
   RECONSTRUCTION
AB This paper extends the central finite-volume schemes of Liu et al. [Y. Liu, C.-W. Shu, E. Tadmor, M. Zhang, Non-oscillatory hierarchical reconstruction for central and finite-volume schemes, Commun. Comput. Phys. 2 (2007) 933-963] on overlapping cells to the magneto-hydrodynamic (MHD) equations. In particular, we propose a high order divergence-free reconstruction for the magnetic field that uses the face-centered values. We also advance the magnetic field with a high order constrained transport (CT) scheme to preserve the divergence-free condition to machine round-off error. The overlapping cells are natural to be used to calculate the electric field flux without an averaging procedure. We have developed a third-order scheme which is verified by the numerical experiments. Other higher order schemes can be constructed accordingly. Our central constrained transport schemes do not need characteristic decomposition, and are easy to code and combine with un-split discretization of the source and parabolic terms. The overlapping cell representation of the solution is also used to develop more compact reconstruction and less dissipative schemes. The high resolution is achieved by non-oscillatory hierarchical reconstruction, which does not require characteristic decomposition either. The numerical comparisons show that the central schemes with non-CT perform as well as with CT for most of problems. Numerical examples are given to demonstrate efficacy of the new schemes. (c) Published by Elsevier Inc.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Li, ST (reprint author), Los Alamos Natl Lab, Div Theoret, MS B284, Los Alamos, NM 87545 USA.
EM sli@lani.gov
OI Li, Shengtai/0000-0002-4142-3080
NR 32
TC 23
Z9 23
U1 0
U2 4
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9991
EI 1090-2716
J9 J COMPUT PHYS
JI J. Comput. Phys.
PD JUL 20
PY 2008
VL 227
IS 15
BP 7368
EP 7393
DI 10.1016/j.jcp.2008.04.022
PG 26
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 329MJ
UT WOS:000257871400018
ER

PT J
AU Morgado, L
   Bruix, M
   Londer, YY
   Pokkuluri, PR
   Schiffer, M
   Salgueiro, CA
AF Morgado, Leonor
   Bruix, Marta
   Londer, Yuri Y.
   Pokkuluri, P. Raj
   Schiffer, Marianne
   Salgueiro, Carlos A.
TI Multiheme periplasmic cytochromes of Geobacter sulfurreducens: Optimized
   cellular devices to face extracellular electron acceptors?
SO BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
LA English
DT Meeting Abstract
CT 15th European Bioenergetics Conference
CY JUL 19-24, 2008
CL Trinity Coll, Dublin, IRELAND
HO Trinity Coll
C1 [Morgado, Leonor; Salgueiro, Carlos A.] Univ Nova Lisboa, Requimte CQFB, FCT, Caparica, 60439, Portugal.
   [Bruix, Marta] CSIC, IQFR, Dept Espectroscopia Estructura Mol, Madrid, Spain.
   [Londer, Yuri Y.; Pokkuluri, P. Raj; Schiffer, Marianne] Argonne Natl Lab, Biosci Div, Argonne, IL USA.
EM mlmorgado@dq.fct.unl.pt
RI Bruix, Marta/H-4161-2011; Salgueiro, Carlos/A-4522-2013; Morgado,
   Leonor/D-7387-2013; Caparica, cqfb_staff/H-2611-2013; REQUIMTE,
   AL/H-9106-2013; Chaves, Pedro/K-1288-2013; REQUIMTE, SMB/M-5694-2013;
   REQUIMTE, UCIBIO/N-9846-2013
OI Bruix, Marta/0000-0002-0096-3558; Salgueiro, Carlos/0000-0003-1136-809X;
   Morgado, Leonor/0000-0002-3760-5180; 
NR 0
TC 1
Z9 1
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0005-2728
J9 BBA-BIOENERGETICS
JI Biochim. Biophys. Acta-Bioenerg.
PD JUL 19
PY 2008
VL 1777
SU S
BP S91
EP S91
DI 10.1016/j.bbabio.2008.05.357
PG 1
WC Biochemistry & Molecular Biology; Biophysics
SC Biochemistry & Molecular Biology; Biophysics
GA 331UI
UT WOS:000258037700347
ER

PT J
AU Woodruff, WH
AF Woodruff, William H.
TI Electrons, protons, and low-energy transitions in heme-copper oxidases
SO BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
LA English
DT Meeting Abstract
CT 15th European Bioenergetic Conference
CY JUL 19-24, 2008
CL Trinity Coll, Dublin, IRELAND
HO Trinity Coll
C1 [Woodruff, William H.] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA.
EM woody@lanl.gov
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0005-2728
J9 BBA-BIOENERGETICS
JI Biochim. Biophys. Acta-Bioenerg.
PD JUL 19
PY 2008
VL 1777
SU S
BP S110
EP S110
DI 10.1016/j.bbabio.2008.05.430
PG 1
WC Biochemistry & Molecular Biology; Biophysics
SC Biochemistry & Molecular Biology; Biophysics
GA 331UI
UT WOS:000258037700420
ER

PT J
AU Filley, TR
   Boutton, TW
   Liao, JD
   Jastrow, JD
   Gamblin, DE
AF Filley, Timothy R.
   Boutton, Thomas W.
   Liao, Julia D.
   Jastrow, Julie D.
   Gamblin, David E.
TI Chemical changes to nonaggregated particulate soil organic matter
   following grassland-to-woodland transition in a subtropical savanna
SO JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
LA English
DT Article
ID WOODY PLANT INVASION; COASTAL MARINE-ENVIRONMENT; PARTICLE-SIZE
   FRACTIONS; CUO REACTION-PRODUCTS; FOREST SOILS; OXIDATION-PRODUCTS;
   EARLY DIAGENESIS; CONIFER NEEDLES; CARBON POOL; LIGNIN
AB Encroachment of thorn woodlands into grasslands of southern Texas has resulted in greater aboveground and belowground biomass and greater soil organic carbon (SOC) stocks. Our previous studies showed that a large percentage of the SOC accrued under invading woody clusters was not stabilized within protective soil aggregates or on mineral-surfaces. Here we evaluated lignin and cutin- and suberin-derived substituted fatty acid (SFA) chemistry to determine if the accrual of nonaggregated particulate organic matter (POM) in woodlands was promoted by inherently greater recalcitrance of tissues from woody versus grass species, and if there was selective input of aboveground versus belowground plant carbon to POM. Woody clusters exhibited reduced concentrations of cutin- derived SFA and cinnamyl phenols within surface litter compared to fresh aboveground plant material. However, root litter exhibited relatively minor changes in biopolymer chemistry compared to fresh root tissue, suggesting it was either more stable or was refreshed at a greater rate. Between 14 and 105 years of woody plant encroachment, SFA in free POM fractions appeared to be consistently derived from root material while SFA within intraaggregate POM were increasingly derived from cutin sources. In addition, the shift from herbaceous to woody input was accompanied by enrichment in the amount of cutin and suberin-derived aliphatics with respect to lignin in both root and surface litter as well as nonaggregated POM. Woody plant encroachment at this site results in the rapid accrual of POM pools that are biochemically recalcitrant, providing a mechanism by which soil organic carbon can accumulate in this sandy soil system. Our results also lend further credence to the hypothesis that aliphatic biopolymers, particularly root-derived suberin, are important components of long-term soil organic carbon stabilization.
C1 [Filley, Timothy R.] Purdue Univ, Dept Earth & Atmospher Sci, W Lafayette, IN 47907 USA.
   Purdue Univ, Purdue Climate Change Res Ctr, W Lafayette, IN 47907 USA.
   [Boutton, Thomas W.; Liao, Julia D.] Texas A&M Univ, Dept Ecosyst Sci & Management, College Stn, TX USA.
   [Jastrow, Julie D.] Argonne Natl Lab, Biosci Div, Argonne, IL 60439 USA.
RP Filley, TR (reprint author), Purdue Univ, Dept Earth & Atmospher Sci, 550 Stadium Mall Dr, W Lafayette, IN 47907 USA.
EM filley@purdue.edu
RI Filley, Timothy/A-9862-2009; Boutton, Thomas/C-5821-2016
OI Boutton, Thomas/0000-0002-7522-5728
NR 60
TC 50
Z9 51
U1 4
U2 48
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-BIOGEO
JI J. Geophys. Res.-Biogeosci.
PD JUL 19
PY 2008
VL 113
IS G3
AR G03009
DI 10.1029/2007JG000564
PG 11
WC Environmental Sciences; Geosciences, Multidisciplinary
SC Environmental Sciences & Ecology; Geology
GA 328LG
UT WOS:000257799300001
ER

PT J
AU Borovsky, JE
   Hesse, M
   Birn, J
   Kuznetsova, MM
AF Borovsky, Joseph E.
   Hesse, Michael
   Birn, Joachim
   Kuznetsova, Maria M.
TI What determines the reconnection rate at the dayside magnetosphere?
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID INTERPLANETARY MAGNETIC-FIELD; PILE-UP RECONNECTION; MAGNETOPAUSE
   RECONNECTION; ELECTRIC-FIELD; LARGE SYSTEMS; MHD; COLLISIONLESS;
   ENVIRONMENT; CHALLENGE; MAGNETOSHEATH
AB Reconnection between the magnetosphere and magnetosheath at the dayside magnetopause is studied for southward IMF using high-resolution 3-D MHD simulations. The BATSRUS code is run at CCMC with a resistive spot added on the magnetopause to ensure that fast reconnection occurs and to control the reconnection physics. A large range of Mach numbers (1.9-15) are run. The reconnection rate at the nose of the magnetosphere is measured and compared with local plasma parameters and with upstream-solar wind parameters. It is found that the reconnection rate is controlled by four local plasma parameters: B(s) (the magnetic field strength in the magnetosheath), B(m) (the magnetic field strength in the magnetosphere), rho(s) (the plasma mass density in the magnetosheath), and rho(m) (the plasma mass density in the magnetosphere). The Cassak-Shay formula for fast reconnection was tested and found to successfully describe the reconnection rate on the dayside magnetopause. It was found that reconnection itself does not significantly modify the local plasma parameters that control dayside reconnection and argued that reconnection does not significantly alter the flow pattern of the magnetosheath. This means that dayside reconnection is not "driven'' in the sense that plasma pileup occurs to change the local parameters to adjust the reconnection rate to balance the driving. A "plasmasphere effect'' was observed in the simulations wherein high-density magnetospheric plasma flows into the magnetopause reconnection site and mass loads the reconnection: a spatially localized plume of plasma was observed to locally reduce the reconnection rate by about a factor of 2.
C1 [Borovsky, Joseph E.; Birn, Joachim] Los Alamos Natl Lab, Space Sci & Applicat Grp ISR 1, Los Alamos, NM 87545 USA.
   [Hesse, Michael; Kuznetsova, Maria M.] NASA, Goddard Space Flight Ctr, Space Weather Lab, Greenbelt, MD 20771 USA.
RP Borovsky, JE (reprint author), Los Alamos Natl Lab, Space Sci & Applicat Grp ISR 1, Mail Stop D466, Los Alamos, NM 87545 USA.
EM jborovsky@lanl.gov
RI Hesse, Michael/D-2031-2012; Kuznetsova, Maria/F-6840-2012; NASA MMS,
   Science Team/J-5393-2013
OI NASA MMS, Science Team/0000-0002-9504-5214
NR 70
TC 63
Z9 64
U1 0
U2 10
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD JUL 19
PY 2008
VL 113
IS A7
AR A07210
DI 10.1029/2007JA012645
PG 17
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 328MD
UT WOS:000257801600001
ER

PT J
AU Beloglazova, N
   Brown, G
   Zimmerman, MD
   Proudfoot, M
   Makarova, KS
   Kudritska, M
   Kochinyan, S
   Wang, S
   Chruszcz, M
   Minor, W
   Koonin, EV
   Edwards, AM
   Savchenko, A
   Yakunin, AF
AF Beloglazova, Natalia
   Brown, Greg
   Zimmerman, Matthew D.
   Proudfoot, Michael
   Makarova, Kira S.
   Kudritska, Marina
   Kochinyan, Samvel
   Wang, Shuren
   Chruszcz, Maksymilian
   Minor, Wladek
   Koonin, Eugene V.
   Edwards, Aled M.
   Savchenko, Alexei
   Yakunin, Alexander F.
TI A novel family of sequence-specific endoribonucleases associated with
   the clustered regularly interspaced short palindromic repeats
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID PROVIDES ACQUIRED-RESISTANCE; MESSENGER-RNA INTERFERASES;
   ELECTRON-DENSITY MAPS; ESCHERICHIA-COLI; STREPTOCOCCUS-THERMOPHILUS;
   MYCOBACTERIUM-TUBERCULOSIS; DEFENSE-MECHANISM; CELL-DEATH;
   IDENTIFICATION; CRISPR
AB Clustered regularly interspaced short palindromic repeats (CRISPRs) together with the associated CAS proteins protect microbial cells from invasion by foreign genetic elements using presently unknown molecular mechanisms. All CRISPR systems contain proteins of the CAS2 family, suggesting that these uncharacterized proteins play a central role in this process. Here we show that the CAS2 proteins represent a novel family of endoribonucleases. Six purified CAS2 proteins from diverse organisms cleaved single-stranded RNAs preferentially within U-rich regions. A representative CAS2 enzyme, SSO1404 from Sulfolobus solfataricus, cleaved the phosphodiester linkage on the 3'-side and generated 5'-phosphate- and 3'-hydroxyl-terminated oligonucleotides. The crystal structure of SSO1404 was solved at 1.6 angstrom resolution revealing the first ribonuclease with a ferredoxin-like fold. Mutagenesis of SSO1404 identified six residues (Tyr-9, Asp-10, Arg-17, Arg-19, Arg-31, and Phe-37) that are important for enzymatic activity and suggested that Asp-10 might be the principal catalytic residue. Thus, CAS2 proteins are sequence-specific endoribonucleases, and we propose that their role in the CRISPR-mediated anti-phage defense might involve degradation of phage or cellular mRNAs.
C1 [Beloglazova, Natalia; Brown, Greg; Proudfoot, Michael; Kudritska, Marina; Kochinyan, Samvel; Edwards, Aled M.; Savchenko, Alexei; Yakunin, Alexander F.] Univ Toronto, Banting & Best Dept Med Res, Toronto, ON M5G 1L6, Canada.
   [Beloglazova, Natalia; Brown, Greg; Proudfoot, Michael; Kudritska, Marina; Kochinyan, Samvel; Edwards, Aled M.; Savchenko, Alexei; Yakunin, Alexander F.] Max Bell Res Ctr 5R407, Ontario Canc Inst, Toronto, ON M5G 2C4, Canada.
   [Zimmerman, Matthew D.; Wang, Shuren; Chruszcz, Maksymilian; Minor, Wladek] Univ Virginia, Dept Mol Physiol & Biol Phys, Charlottesville, VA 22908 USA.
   [Zimmerman, Matthew D.; Kudritska, Marina; Wang, Shuren; Chruszcz, Maksymilian; Minor, Wladek; Edwards, Aled M.; Savchenko, Alexei] Argonne Natl Lab, Midwest Ctr Struct Gen, Biosci Div, Argonne, IL 60439 USA.
   [Makarova, Kira S.; Koonin, Eugene V.] Natl Inst Hlth, Natl Lib Med, Natl Ctr Biotechnol Informat, Bethesda, MD 20894 USA.
RP Yakunin, AF (reprint author), Univ Toronto, Banting & Best Dept Med Res, 112 Coll St, Toronto, ON M5G 1L6, Canada.
EM a.iakounine@utoronto.ca
RI Chruszcz, Maksymilian/E-6407-2011; Minor, Wladek/F-3096-2014; Yakunin,
   Alexander/J-1519-2014; Zimmerman, Matthew/N-9489-2013; 
OI Zimmerman, Matthew/0000-0002-6274-9493; Chruszcz,
   Maksymilian/0000-0001-7521-5485; Yakunin, Alexander/0000-0003-0813-6490;
   Minor, Wladek/0000-0001-7075-7090
FU Intramural NIH HHS; NIGMS NIH HHS [GM 074942, GM 62414]
NR 64
TC 107
Z9 120
U1 2
U2 26
PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA
SN 0021-9258
J9 J BIOL CHEM
JI J. Biol. Chem.
PD JUL 18
PY 2008
VL 283
IS 29
BP 20361
EP 20371
DI 10.1074/jbc.M803225200
PG 11
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 325CH
UT WOS:000257565300052
PM 18482976
ER

PT J
AU Levkin, PA
   Eeltink, S
   Stratton, TR
   Brennen, R
   Robotti, K
   Yin, H
   Killeen, K
   Svec, F
   Frechet, JMJ
AF Levkin, Pavel A.
   Eeltink, Sebastiaan
   Stratton, Thomas R.
   Brennen, Reid
   Robotti, Karla
   Yin, Hongfeng
   Killeen, Kevin
   Svec, Frantisek
   Frechet, Jean M. J.
TI Monolithic porous polymer stationary phases in polyimide chips for the
   fast high-performance liquid chromatography separation of proteins and
   peptides
SO JOURNAL OF CHROMATOGRAPHY A
LA English
DT Article; Proceedings Paper
CT 31st International Symposium on Capillary Chromatography
CY NOV 28-30, 2007
CL Albuquerque, NM
DE microfluidics; HPLC; chip; monoliths; stationary phase; protein
   separation; peptide separation; proteomics
ID CO-ETHYLENE DIMETHACRYLATE); CYCLIC OLEFIN COPOLYMERS; MICROFLUIDIC
   DEVICES; CAPILLARY ELECTROCHROMATOGRAPHY; SURFACE-CHEMISTRY;
   MASS-SPECTROMETRY; HPLC-CHIP; COLUMNS; EXTRACTION; PROTEOMICS
AB Poly(lauryl methacrylate-co-ethylene dimethacrylate) and poly(styrene-co-divinylbenzene) stationary phases in monolithic format have been prepared by thermally initiated free radical polymerization within polyimide chips featuring channels having a cross-section of 200 mu m x 200 mu m and a length of 6.8 cm. These chips were then used for the separation of a mixture of proteins including ribonuclease A, myoglobin, cytochrome c, and ovalbumin, as well as peptides. The separations were monitored by UV adsorption. Both the monolithic phases based on methacrylate and on styrene chemistries enabled the rapid baseline separation of most of the test mixtures. Best performance was achieved with the styrenic monolith leading to fast baseline separation of all four proteins in less than 2.5 min. The in situ monolith preparation process affords microfluidic devices exhibiting good batch-to-batch and injection-to-injection repeatability. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Levkin, Pavel A.; Eeltink, Sebastiaan; Frechet, Jean M. J.] Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA.
   [Stratton, Thomas R.] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA.
   [Brennen, Reid; Robotti, Karla; Yin, Hongfeng; Killeen, Kevin] Mol Technol Lab, Agilent Labs, Santa Clara, CA USA.
   [Svec, Frantisek; Frechet, Jean M. J.] EO Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Frechet, JMJ (reprint author), Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA.
EM frechet@berkeley.edu
RI Stratton, Thomas/F-6359-2010; Levkin, Pavel/E-5804-2011; 
OI Levkin, Pavel/0000-0002-5975-948X; Frechet, Jean /0000-0001-6419-0163
FU NIBIB NIH HHS [EB-006133, R01 EB006133, R01 EB006133-03]; NIGMS NIH HHS
   [R01 GM048364-16]
NR 47
TC 80
Z9 85
U1 4
U2 49
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0021-9673
EI 1873-3778
J9 J CHROMATOGR A
JI J. Chromatogr. A
PD JUL 18
PY 2008
VL 1200
IS 1
BP 55
EP 61
DI 10.1016/j.chroma.2008.03.025
PG 7
WC Biochemical Research Methods; Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA 325OM
UT WOS:000257598200009
PM 18374934
ER

PT J
AU Nowak, D
   Vuilleumier, L
   Long, CN
   Ohmura, A
AF Nowak, Daniela
   Vuilleumier, Laurent
   Long, Charles N.
   Ohmura, Atsumu
TI Solar irradiance computations compared with observations at the Baseline
   Surface Radiation Network Payerne site
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID CLOUD; SKIES
AB Radiative transfer model calculations of solar fluxes during cloud-free periods often show considerable discrepancies with surface radiation observations. Many efforts have been undertaken to explain the differences between modeled and observed shortwave downward radiation (SDR). In this study, MODTRAN4v3r1 (TM) (designed later simply as MODTRAN (TM)) was used for model simulations and compared with high-quality radiation observations of the Baseline Surface Radiation Network (BSRN) site at Payerne, Switzerland. Results are presented for cloud-free shortwave downward radiation calculations. The median differences of modeled minus observed global SDR are small (<1%) and within the instrumental error. The differences of modeled and observed direct and diffuse SDR show larger discrepancies of -1.8% and 5.2%, respectively. The diffuse SDR is generally overestimated by the model, and more important, the model to observation linear regression slope and zero intercept differ significantly from their ideal values of 1 and 0. Possible reasons for the discrepancies are presented and discussed, and some modifications are investigated for decreasing such differences between modeled and observed diffuse SDR. However, we could not resolve all the discrepancies. The best agreement is obtained when comparing model simulations whose 550-nm aerosol optical depth input is inferred from observations using nine spectral channels and using BSRN observations performed with a new and more precise shading disk and Sun-tracking system. In this case, the median bias between model simulations and observed diffuse SDR is -0.4 W m(-2) (<1%).
C1 [Nowak, Daniela; Ohmura, Atsumu] ETH, Inst Atmospher & Climate Sci, CH-8092 Zurich, Switzerland.
   [Vuilleumier, Laurent] MeteoSwiss, Fed Off Meteorol & Climatol, CH-1530 Payerne, Switzerland.
   [Long, Charles N.] Pacific NW Natl Lab, Richland, WA 99354 USA.
RP Nowak, D (reprint author), ETH, Inst Atmospher & Climate Sci, CH-8092 Zurich, Switzerland.
EM daniela.nowak@env.ethz.ch
NR 22
TC 8
Z9 9
U1 0
U2 9
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD JUL 18
PY 2008
VL 113
IS D14
AR D14206
DI 10.1029/2007JD009441
PG 9
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 328KW
UT WOS:000257798300004
ER

PT J
AU Calvo, I
   Sanchez, R
AF Calvo, I.
   Sanchez, R.
TI The path integral formulation of fractional Brownian motion for the
   general Hurst exponent
SO JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
LA English
DT Article
AB In 1995, Sebastian (1995 J. Phys. A: Math. Gen. 28 4305) gave a path integral computation of the propagator of subdiffusive fractional Brownian motion (fBm), i.e. fBm with a Hurst or self-similarity exponent H epsilon (0,1/2). The extension of Sebastian's calculation to superdiffusion, H epsilon (1/2, 1], becomes however quite involved due to the appearance of additional boundary conditions on fractional derivatives of the path. In this communication, we address the construction of the path integral representation in a different fashion, which allows us to treat both subdiffusion and superdiffusion on an equal footing. The derivation of the propagator of fBm for the general Hurst exponent is then performed in a neat and unified way.
C1 [Calvo, I.] CIEMAT, Asociac EURATOM, Lab Nacl Fus, E-28040 Madrid, Spain.
   [Sanchez, R.] Oak Ridge Natl Lab, Div Fus Energy, Oak Ridge, TN 37831 USA.
RP Calvo, I (reprint author), CIEMAT, Asociac EURATOM, Lab Nacl Fus, E-28040 Madrid, Spain.
EM ivan.calvo@ciemat.es; sanchezferlr@ornl.gov
RI Sanchez, Raul/C-2328-2008; Calvo, Ivan/B-3444-2009
OI Calvo, Ivan/0000-0003-3118-3463
NR 15
TC 11
Z9 11
U1 0
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1751-8113
J9 J PHYS A-MATH THEOR
JI J. Phys. A-Math. Theor.
PD JUL 18
PY 2008
VL 41
IS 28
AR 282002
DI 10.1088/1751-8113/41/28/282002
PG 5
WC Physics, Multidisciplinary; Physics, Mathematical
SC Physics
GA 319MG
UT WOS:000257167100002
ER

PT J
AU Ethvignot, T
   Devlin, M
   Duarte, H
   Granier, T
   Haight, RC
   Morillon, B
   Nelson, RO
   O'Donnell, JM
   Rochman, D
AF Ethvignot, T.
   Devlin, M.
   Duarte, H.
   Granier, T.
   Haight, R. C.
   Morillon, B.
   Nelson, R. O.
   O'Donnell, J. M.
   Rochman, D.
TI Comment on "Neutron Multiplicity in the Fission of U-238 and U-231 with
   Neutrons up to 200 MeV" - Reply
SO PHYSICAL REVIEW LETTERS
LA English
DT Editorial Material
C1 [Ethvignot, T.; Duarte, H.; Granier, T.; Morillon, B.] CEA, DAM, F-91297 Bruyeres Le Chatel, Arpajon, France.
   [Devlin, M.; Haight, R. C.; Nelson, R. O.; O'Donnell, J. M.; Rochman, D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Ethvignot, T (reprint author), CEA, DAM, F-91297 Bruyeres Le Chatel, Arpajon, France.
RI Devlin, Matthew/B-5089-2013; 
OI Devlin, Matthew/0000-0002-6948-2154; Rochman,
   Dimitri/0000-0002-5089-7034
NR 5
TC 6
Z9 6
U1 0
U2 2
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 JUL 18
PY 2008
VL 101
IS 3
AR 039202
DI 10.1103/PhysRevLett.101.039202
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 333WO
UT WOS:000258184500067
ER

PT J
AU Kimura, H
   Barber, RP
   Ono, S
   Ando, Y
   Dynes, RC
AF Kimura, Hikari
   Barber, R. P., Jr.
   Ono, S.
   Ando, Yoichi
   Dynes, R. C.
TI Scanning Josephson tunneling microscopy of single-crystal
   Bi(2)Sr(2)CaCu(2)O(8+delta) with a conventional superconducting tip
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID JUNCTIONS; DENSITY; GAP; PB
AB We have performed both Josephson and quasiparticle tunneling in vacuum tunnel junctions formed between a conventional superconducting scanning tunneling microscope tip and overdoped Bi(2)Sr(2)CaCu(2)O(8+delta) single crystals. A Josephson current is observed with a peak centered at a small finite voltage due to the thermal-fluctuation-dominated superconducting phase dynamics. Josephson measurements at different surface locations yield local values for the Josephson I(C)R(N) product. Corresponding energy gap measurements were also per-formed and a surprising inverse correlation was observed between the local I(C)R(N) product and the local energy gap.
C1 [Kimura, Hikari; Dynes, R. C.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   [Kimura, Hikari; Dynes, R. C.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   [Barber, R. P., Jr.] Santa Clara Univ, Dept Phys, Santa Clara, CA 95053 USA.
   [Ono, S.] Cent Res Inst Elect Power Ind, Tokyo 2018511, Japan.
   [Ando, Yoichi] Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan.
RP Kimura, H (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM rdynes@physics.berkeley.edu
RI Kimura, Hikari/A-8181-2010; Ando, Yoichi/B-8163-2013; 
OI Ando, Yoichi/0000-0002-3553-3355; Barber, Richard/0000-0002-5830-5195
NR 22
TC 6
Z9 6
U1 0
U2 7
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 18
PY 2008
VL 101
IS 3
AR 037002
DI 10.1103/PhysRevLett.101.037002
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 333WO
UT WOS:000258184500045
PM 18764282
ER

PT J
AU McCalla, SG
   Lestone, JP
AF McCalla, S. G.
   Lestone, J. P.
TI Fission decay widths for heavy-ion fusion-fission reactions
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID HIGH-EXCITATION ENERGIES; LEVEL DENSITY PARAMETER; NEUTRON EMISSION;
   NUCLEAR-FISSION; MODEL; MULTIPLICITIES; DYNAMICS; SPIN
AB Cross-section and neutron-emission data from heavy-ion fusion-fission reactions are consistent with a Kramers-modified statistical model which takes into account the collective motion of the system about the ground state, the temperature dependence of the location of fission transition points, and the orientation degree of freedom. The strong increase in the nuclear viscosity above a temperature of similar to 1 MeV deduced by others is an artifact generated by an inadequate fission model.
C1 [McCalla, S. G.; Lestone, J. P.] Los Alamos Natl Lab, Div Appl Phys, Los Alamos, NM 87545 USA.
RP McCalla, SG (reprint author), Brown Univ, Div Appl Math, Providence, RI 02912 USA.
NR 37
TC 42
Z9 42
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 18
PY 2008
VL 101
IS 3
AR 032702
DI 10.1103/PhysRevLett.101.032702
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 333WO
UT WOS:000258184500011
PM 18764248
ER

PT J
AU Ocko, BM
   Dhinojwala, A
   Daillant, J
AF Ocko, Benjamin M.
   Dhinojwala, Ali
   Daillant, Jean
TI Comment on "How water meets a hydrophobic surface"
SO PHYSICAL REVIEW LETTERS
LA English
DT Editorial Material
ID X-RAY; INTERFACE
C1 [Ocko, Benjamin M.] Brookhaven Natl Lab, Upton, NY 11973 USA.
   [Dhinojwala, Ali] Univ Akron, Akron, OH 44325 USA.
   [Daillant, Jean] CEA, IRAMIS, LIONS, F-91191 Gif Sur Yvette, France.
RP Ocko, BM (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
NR 10
TC 37
Z9 37
U1 1
U2 22
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 18
PY 2008
VL 101
IS 3
AR 039601
DI 10.1103/PhysRevLett.101.039601
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 333WO
UT WOS:000258184500068
PM 18764305
ER

PT J
AU Poynor, A
   Hong, L
   Robinson, IK
   Granick, S
   Fenter, PA
   Zhang, Z
AF Poynor, Adele
   Hong, Liang
   Robinson, Ian K.
   Granick, Steve
   Fenter, Paul A.
   Zhang, Zhan
TI Comment on "How water meets a hydrophobic surface'' - Reply
SO PHYSICAL REVIEW LETTERS
LA English
DT Editorial Material
ID X-RAY; INTERFACE
C1 [Poynor, Adele; Hong, Liang; Robinson, Ian K.; Granick, Steve] Univ Illinois, Mat Res Lab, Urbana, IL 61801 USA.
   [Zhang, Zhan] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Poynor, A (reprint author), Univ Illinois, Mat Res Lab, Urbana, IL 61801 USA.
RI Hong, Liang/D-5604-2009; Zhang, Zhan/A-9830-2008; 
OI Zhang, Zhan/0000-0002-7618-6134; Fenter, Paul/0000-0002-6672-9748
NR 9
TC 11
Z9 11
U1 1
U2 19
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 18
PY 2008
VL 101
IS 3
AR 039602
DI 10.1103/PhysRevLett.101.039602
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 333WO
UT WOS:000258184500069
ER

PT J
AU Tokiwa, Y
   Movshovich, R
   Ronning, F
   Bauer, ED
   Papin, P
   Bianchi, AD
   Rauscher, JF
   Kauzlarich, SM
   Fisk, Z
AF Tokiwa, Y.
   Movshovich, R.
   Ronning, F.
   Bauer, E. D.
   Papin, P.
   Bianchi, A. D.
   Rauscher, J. F.
   Kauzlarich, S. M.
   Fisk, Z.
TI Anisotropic effect of Cd and Hg doping on the Pauli limited
   superconductor CeCoIn(5)
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID UNCONVENTIONAL SUPERCONDUCTIVITY; EXCHANGE FIELD; STATE; HEAT
AB We studied the effect of impurity on the first order superconducting (SC) transition and the high field-low temperature (HFLT) SC state of CeCoIn(5) by measuring the specific heat of CeCo(In(1-x)Cd(x))(5) with x = 0.0011, 0.0022, and 0.0033 and CeCo(In(1-x)Hg(x))(5) with x = 0.00016, 0.000 32, and 0.00048 at temperatures down to 0.1 K and fields up to 14 T. Cd substitution rapidly suppresses the crossover temperature To, where the SC transition changes from second to first order, to T = 0 K with x = 0.0022 for H parallel to [100], while it remains roughly constant up to x = 0.0033 for H parallel to [001]. The associated anomaly of the proposed FFLO state in Hg-doped samples is washed out by x = 0.000 48, while remaining at the same temperature, indicating high sensitivity of that state to impurities. We interpret these results as supporting the nonmagnetic, possibly FFLO, origin of the HFLT state in CeCoIn(5).
C1 [Tokiwa, Y.; Movshovich, R.; Ronning, F.; Bauer, E. D.; Papin, P.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Bianchi, A. D.] Univ Montreal, Dept Phys Montreal, Montreal, PQ H3C 3J7, Canada.
   [Rauscher, J. F.; Kauzlarich, S. M.] Univ Calif Davis, Dept Chem, Davis, CA 95616 USA.
   [Fisk, Z.] Univ Calif Irvine, Dept Phys, Irvine, CA 92697 USA.
RP Tokiwa, Y (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
RI Bauer, Eric/D-7212-2011; Kauzlarich, Susan/H-1439-2011; Tokiwa,
   Yoshifumi/P-6593-2015; Bianchi, Andrea/E-9779-2010; 
OI Tokiwa, Yoshifumi/0000-0002-6294-7879; Bianchi,
   Andrea/0000-0001-9340-6971; Ronning, Filip/0000-0002-2679-7957; Bauer,
   Eric/0000-0003-0017-1937
NR 23
TC 29
Z9 29
U1 0
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 18
PY 2008
VL 101
IS 3
AR 037001
DI 10.1103/PhysRevLett.101.037001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 333WO
UT WOS:000258184500044
PM 18764281
ER

PT J
AU Xiang, HJ
   Wei, SH
   Whangbo, MH
   Da Silva, JLF
AF Xiang, H. J.
   Wei, Su-Huai
   Whangbo, M. -H.
   Da Silva, Juarez L. F.
TI Spin-orbit coupling and ion displacements in multiferroic TbMnO(3)
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID TOTAL-ENERGY CALCULATIONS; AUGMENTED-WAVE METHOD; BASIS-SET;
   POLARIZATION
AB The magnetic and ferroelectric (FE) properties of ThMnO(3) are investigated on the basis of relativistic density functional theory calculations. We show that, due to spin-orbit coupling, the spin-spiral plane of TbMnO(3) can be either the bc or ab plane, but not the ac plane. As for the mechanism of FE polarization, our work reveals that the "pure electronic" model by Katsura, Nagaosa, and Balatsky is inadequate in predicting the absolute direction of FE polarization. Our work indicates that to determine the magnitude and the absolute direction of FE polarization in spin-spiral states, it is crucial to consider the displacements of the ions from their centrosymmetric positions.
C1 [Xiang, H. J.; Wei, Su-Huai; Da Silva, Juarez L. F.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
   [Whangbo, M. -H.] N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA.
RP Xiang, HJ (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
RI Xiang, Hongjun/A-4076-2008; Da Silva, Juarez L. F./D-1779-2011; Xiang,
   Hongjun/I-4305-2016
OI Da Silva, Juarez L. F./0000-0003-0645-8760; Xiang,
   Hongjun/0000-0002-9396-3214
NR 34
TC 105
Z9 109
U1 5
U2 37
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 18
PY 2008
VL 101
IS 3
AR 037209
DI 10.1103/PhysRevLett.101.037209
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 333WO
UT WOS:000258184500054
PM 18764291
ER

PT J
AU Young, PE
   Rosen, MD
   Hammer, JH
   Hsing, WS
   Glendinning, SG
   Turner, RE
   Kirkwood, R
   Schein, J
   Sorce, C
   Satcher, JH
   Hamza, A
   Reibold, RA
   Hibbard, R
   Landen, O
   Reighard, A
   McAlpin, S
   Stevenson, M
   Thomas, B
AF Young, P. E.
   Rosen, M. D.
   Hammer, J. H.
   Hsing, W. S.
   Glendinning, S. G.
   Turner, R. E.
   Kirkwood, R.
   Schein, J.
   Sorce, C.
   Satcher, J. H., Jr.
   Hamza, A.
   Reibold, R. A.
   Hibbard, R.
   Landen, O.
   Reighard, A.
   McAlpin, S.
   Stevenson, M.
   Thomas, B.
TI Demonstration of the density dependence of x-ray flux in a laser-driven
   hohlraum
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID RADIATION
AB Experiments have been conducted using laser-driven cylindrical hohlraums whose walls are machined from Ta(2)O(5) foams of 100 mg/cc and 4 g/cc densities. Measurements of the radiation temperature demonstrate that the lower density walls produce higher radiation temperatures than the high density walls. This is the first experimental demonstration of the prediction that this would occur [M. D. Rosen and J. H. Hammer, Phys. Rev. E 72, 056403 (2005)]. For high density walls, the radiation front propagates subsonically, and part of the absorbed energy is wasted by the flow kinetic energy. For the lower wall density, the front velocity is supersonic and can devote almost all of the absorbed energy to heating the wall.
C1 [Young, P. E.; Rosen, M. D.; Hammer, J. H.; Hsing, W. S.; Glendinning, S. G.; Turner, R. E.; Kirkwood, R.; Schein, J.; Sorce, C.; Satcher, J. H., Jr.; Hamza, A.; Reibold, R. A.; Hibbard, R.; Landen, O.; Reighard, A.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   [McAlpin, S.; Stevenson, M.; Thomas, B.] Atom Weap Estab, Reading RG7 4PR, Berks, England.
RP Young, PE (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA.
NR 9
TC 26
Z9 28
U1 0
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 18
PY 2008
VL 101
IS 3
AR 035001
DI 10.1103/PhysRevLett.101.035001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 333WO
UT WOS:000258184500021
PM 18764258
ER

PT J
AU Zhang, Y
   Mascarenhas, A
   Wang, LW
AF Zhang, Yong
   Mascarenhas, A.
   Wang, L. -W.
TI Non-bloch nature of alloy states in a conventional semiconductor alloy:
   Ga(x)In(1-x)P as an example
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ELECTRONIC-STRUCTURE; QUANTUM DOTS; PHOTOLUMINESCENCE; CRYSTALS;
   EXCITONS; ENERGY
AB Using Ga(x)In(1-x)P as a prototype system, we present the first systematic examination of the alloy scattering effects on the global electronic structure of a semiconductor alloy for the whole composition range. Contrary to conventional wisdom, many electronic states in such a "well behaved" alloy are found to differ drastically from a Bloch state, including band edge states that are derived from degenerate critical points. This study offers a more comprehensive picture of the electronic structure of the alloy, and reveals new nontrivial but vital implications of the alloy scattering on transport and optical properties.
C1 [Zhang, Yong; Mascarenhas, A.] 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
NR 25
TC 11
Z9 11
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 18
PY 2008
VL 101
IS 3
AR 036403
DI 10.1103/PhysRevLett.101.036403
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 333WO
UT WOS:000258184500033
PM 18764270
ER

PT J
AU Patton, HJ
   Taylor, SR
AF Patton, Howard J.
   Taylor, Steven R.
TI Effects of shock-induced tensile failure on m(b)-M-s discrimination:
   Contrasts between historic nuclear explosions and the North Korean test
   of 9 October 2006
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID UNDERGROUND EXPLOSIONS; SURFACE-WAVES; PERIOD
AB Rayleigh wave excitation is studied for an explosion source model consisting of a superposition of isotropic (monopole), tensile failure, and tectonic release point sources. The body-force representation for shock-induced, deep-seated tensile failure is a compensated linear vector dipole CLVD, where the relative strength of the CLVD is given by an index K. Rayleigh wave amplitudes are reduced owing to destructive interference between an explosive monopole and a CLVD source with vertical axis of symmetry in extension (K > 1). The effect of tensile failure on M-s is to enhance the explosion-like characteristics on a plot of m(b)-M-s. This model suggests that the success of the m(b)-M-s discriminant results from the fact that nuclear tests were conducted under containment practices for which tensile failure is ubiquitous, while the North Korean nuclear test of 9 October 2006 is a harbinger of poor m(b)-M-s performance when tensile failure is completely suppressed.
C1 [Patton, Howard J.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Taylor, Steven R.] Rocky Mt Geophys LLC, Los Alamos, NM 87544 USA.
RP Patton, HJ (reprint author), Los Alamos Natl Lab, MS F659,POB 1663, Los Alamos, NM 87545 USA.
EM patton@lanl.gov
NR 22
TC 28
Z9 28
U1 0
U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
EI 1944-8007
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD JUL 17
PY 2008
VL 35
IS 14
AR L14301
DI 10.1029/2008GL034211
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 328KJ
UT WOS:000257797000004
ER

PT J
AU Liang, Q
   Stolarski, RS
   Douglass, AR
   Newman, PA
   Nielsen, JE
AF Liang, Qing
   Stolarski, Richard S.
   Douglass, Anne R.
   Newman, Paul A.
   Nielsen, J. Eric
TI Evaluation of emissions and transport of CFCs using surface observations
   and their seasonal cycles and the GEOS CCM simulation with
   emissions-based forcing
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID CARBON-MONOXIDE; AIR-POLLUTION; MACE HEAD; OZONE; PACIFIC; TROPOSPHERE;
   EXCHANGE; STRATOSPHERE; TROPOPAUSE; ATMOSPHERE
AB Levels of ozone depleting substances (ODSs) in our atmosphere are determined by production, emission, and loss processes. However, atmospheric models are forced by the specified mixing ratios of these ODSs rather than the more fundamental emissions-based forcing. To more accurately represent the physics and chemistry of climate change on atmospheric circulation and ODSs, and therefore future ozone recovery, it is desirable to switch from the current highly constrained mixing-ratio-based forcing to emissions-based forcing in general circulation models (GCMs). As a first step of this model transition, we have conducted a 45-year (1960-2005) emissions-based simulation of the three primary chlorofluorocarbons (CFC-11,-12,-113) using the GEOS coupled chemistry-climate model (CCM). The simulated CFC concentrations and their seasonal cycles are compared with AGAGE and NOAA-GMD observations to evaluate emissions and atmospheric transport. The simulated CFC-12 agrees well with the observations, indicating a good estimate of emission and atmospheric loss. The simulated CFC-11 and CFC-113 shows high biases due to overestimate of emissions. Using tagged CFC tracers to track recent surface emissions and aged air masses transported downward from the stratosphere separately, we quantify the relative contribution of stratosphere-troposphere exchange (STE) and tropospheric transport to the seasonal cycles of CFCs in the lower troposphere. The seasonal cycles of CFCs in the lower troposphere are dominated by tropospheric transport of recent emissions during 1985-1994. The 1995-1999 period marks the transition period when variations due to fresh emissions and STE become equally important. Seasonal cycles of CFCs at most surface sites in the 2000-2004 period are dominated by STE. Seasonal cycles of CFCs due to STE show a late winter/early spring maximum and a summer/fall minimum. Seasonality of the tropospheric transport component at individual stations is governed by seasonal transport variations of fresh emissions from the polluted regions.
C1 [Liang, Qing; Stolarski, Richard S.; Douglass, Anne R.; Newman, Paul A.] NASA, Goddard Space Flight Ctr, Atmospher Chem & Dynam Branch, Greenbelt, MD 20771 USA.
   [Liang, Qing] Oak Ridge Associated Univ, NASA, Postdoctoral Program, Oak Ridge, TN 37831 USA.
   [Nielsen, J. Eric] NASA, Goddard Space Flight Ctr, Global Modeling & Assimilat Off, Greenbelt, MD 20771 USA.
   [Nielsen, J. Eric] Sci Syst & Applicat Inc, Lanham, MD USA.
RP Liang, Q (reprint author), NASA, Goddard Space Flight Ctr, Atmospher Chem & Dynam Branch, Code 613-3, Greenbelt, MD 20771 USA.
EM qing.liang-1@nasa.gov; richard.s.stolarski@nasa.gov;
   anne.r.douglass@nasa.gov; paul.a.newman@nasa.gov;
   nielsen@gmao.gsfc.nasa.gov
RI Liang, Qing/B-1276-2011; Newman, Paul/D-6208-2012; Douglass,
   Anne/D-4655-2012; Stolarski, Richard/B-8499-2013
OI Newman, Paul/0000-0003-1139-2508; Stolarski, Richard/0000-0001-8722-4012
NR 46
TC 15
Z9 15
U1 0
U2 10
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
EI 2169-8996
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD JUL 17
PY 2008
VL 113
IS D14
AR D14302
DI 10.1029/2007JD009617
PG 15
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 328KV
UT WOS:000257798200006
ER

PT J
AU Mincher, BJ
   Mezyk, SP
   Martin, LR
AF Mincher, Bruce J.
   Mezyk, Stephen P.
   Martin, Leigh R.
TI A pulse radiolysis investigation of the reactions of tributyl phosphate
   with the radical products of aqueous nitric acid irradiation
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID GAS-LIQUID-CHROMATOGRAPHY; RATE CONSTANTS; HYDRATED ELECTRONS; HYDROXYL
   RADICALS; ORGANIC-COMPOUNDS; DILUENT SYSTEMS; HYDROGEN-ATOMS; SOLVENT;
   IDENTIFICATION; DEGRADATION
AB Tributyl phosphate (TBP) is the most common organic compound used in liquid-liquid separations for the recovery of uranium, neptunium, and plutonium from acidic nuclear fuel dissolutions. The goal of these processes is to extract the actinides while leaving fission products in the acidic, aqueous phase. However, the radiolytic degradation of TBP has been shown to reduce separation factors of the actinides from fission products and to impede the back-extraction of the actinides during stripping. As most previous investigations of the radiation chemistry of TBP have focused on steady state radiolysis and stable product identification, with dibutylphosphoric acid (HDBP) invariably being the major product, here we have determined room temperature rate constants for the reactions of TBP and HDBP with the hydroxyl radical [(5.00 +/- 0.05) x 10(9), (4.40 +/- 0.13) x 10(9) M(-1) s(-1)], hydrogen atom,[(1.8 +/- 0.2) x 10(8), (1.1 +/- 0.1) x 10(8) M(-1) s(-1)], nitrate radical [(4.3 +/- 0.7) x 10(6), (2.9 +/- 0.2) x 10(6) M(-1) s(-1)], and nitrite radical (<2 x 10(5), <2 x 10(5) M(-1) s(-1)), respectively. These data are used to discuss the mechanism of TBP radical-induced degradation.
C1 [Mincher, Bruce J.; Martin, Leigh R.] Idaho Natl Lab, Aqueous Separat & Radiochem Dept, Idaho Falls, ID 83415 USA.
   [Mezyk, Stephen P.] Calif State Univ Long Beach, Dept Chem & Biochem, Long Beach, CA 90840 USA.
RP Mincher, BJ (reprint author), Idaho Natl Lab, Aqueous Separat & Radiochem Dept, POB 1625, Idaho Falls, ID 83415 USA.
EM bruce.mincher@inl.gov; smezyk@csulb.edu
RI Martin, Leigh/P-3167-2016; Mincher, Bruce/C-7758-2017
OI Martin, Leigh/0000-0001-7241-7110; 
NR 36
TC 21
Z9 21
U1 2
U2 12
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD JUL 17
PY 2008
VL 112
IS 28
BP 6275
EP 6280
DI 10.1021/jp802169v
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 324TN
UT WOS:000257542400006
PM 18572898
ER

PT J
AU Park, TJ
   Sambasivan, S
   Fischer, DA
   Yoon, WS
   Misewich, JA
   Wong, SS
AF Park, Tae-Jin
   Sambasivan, Sharadha
   Fischer, Daniel A.
   Yoon, Won-Sub
   Misewich, James A.
   Wong, Stanislaus S.
TI Electronic structure and chemistry of iron-based metal oxide
   nanostructured materials: A NEXAFS investigation of BiFeO3, Bi2Fe4O9,
   alpha-Fe2O3, gamma-Fe2O3, and Fe/Fe3O4
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID X-RAY-ABSORPTION; 3D TRANSITION-METALS; ENERGY-LOSS-SPECTROSCOPY;
   MAGNETIC-PROPERTIES; OXIDATION-STATE; FINE-STRUCTURES; NANOPARTICLES;
   EDGES; NANOTUBES; CRYSTAL
AB We present a systematic and detailed near edge X-ray absorption fine structure (NEXAFS) experimental investigation of the electronic structure and chemistry of iron-based metal oxide nanostructured (FeMONS) materials including BiFeO3, Bi2Fe4O9, alpha-Fe2O3, gamma-Fe2O3, and Fe/Fe3O4: Correlations of the electronic structure and structural chemistry of these intriguing nanomaterials are presented, ranging from the nano to the bulk scale. In this work, variations in the shape, position, and intensity of the O K-edge and Fe L-edge NEXAFS spectra have been analyzed in terms of electronic structure and surface chemistry of the FeMONS materials as compared with that of the bulk. We hypothesize that surface imperfection and surface strain anisotropies in nanoparticles induce distortion and site inequivalency of the oxygen O-h sites around the Fe ion located close to the surface, resulting in an increase in the degree of multiplicity as well as in nonstoichiometric effects in FeMONS materials.
C1 [Sambasivan, Sharadha; Fischer, Daniel A.] Natl Inst Stand & Technol, Mat Sci & Engn Lab, Gaithersburg, MD 20889 USA.
   [Park, Tae-Jin; Wong, Stanislaus S.] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
   [Sambasivan, Sharadha] Suffolk Community Coll, Dept Chem, Selden, NY 11784 USA.
   [Yoon, Won-Sub] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
   [Misewich, James A.; Wong, Stanislaus S.] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
RP Sambasivan, S (reprint author), Natl Inst Stand & Technol, Mat Sci & Engn Lab, Gaithersburg, MD 20889 USA.
EM sharadha@bnl.gov; dfischer@nist.gov; sswong@notes.cc.sunysb.edu
RI Yoon, Won-Sub/H-2343-2011
NR 42
TC 47
Z9 47
U1 5
U2 97
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD JUL 17
PY 2008
VL 112
IS 28
BP 10359
EP 10369
DI 10.1021/jp801449p
PG 11
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 324TP
UT WOS:000257542600005
ER

PT J
AU Luo, WQ
   Li, RF
   Liu, GK
   Antonio, MR
   Chen, XY
AF Luo, Wenqin
   Li, Renfu
   Liu, Guokui
   Antonio, Mark R.
   Chen, Xueyuan
TI Evidence of trivalent europium incorporated in anatase TiO2 nanocrystals
   with multiple sites
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID TITANIA THIN-FILMS; RARE-EARTH IONS; PHOTOLUMINESCENCE PROPERTIES;
   SEMICONDUCTOR NANOPARTICLES; OPTICAL-PROPERTIES; EU; LUMINESCENCE;
   FLUORESCENCE; SPECTROSCOPY; SPECTRA
AB Trivalent europium ions have been successfully incorporated in anatase TiO2 nanocrystals via a sol-gel solvothermal synthesis, in spite of a large mismatch in ionic radius between Eu3+ and Ti4+. The photoluminescence intensity of Eu3+:TiO2 nanocrystals has been significantly improved, which is comparable to that of common red phosphors. Multiple sites of Eu3+ in TiO2 nanocrystals have been identified by the technique of site-selective spectroscopy. Eu3+ ions at two lattice sites exhibit sharp emission and excitation peaks with site symmetries descending from D-2d to approximate C-2v and D-2 as a result of the lattice distortion, whereas Eu3+ ions at disordered site near the surface are analogous to Eu3+ ions located in a glasslike environment. Extended X-ray absorption fine structure is utilized for identifying the local structure and Eu3+ coordination. The luminescence dynamics and crystal-field levels of Eu3+ at different sites have been analyzed. A growth mechanism for the incorporation of Eu3+ in the anatase lattice is also suggested.
C1 [Luo, Wenqin; Li, Renfu; Chen, Xueyuan] Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys, Fuzhou 350002, Fujian, Peoples R China.
   [Luo, Wenqin; Li, Renfu; Chen, Xueyuan] State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China.
   [Liu, Guokui; Antonio, Mark R.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Chen, XY (reprint author), Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys, Fuzhou 350002, Fujian, Peoples R China.
EM xchen@fjirsm.ac.cn
RI Chen, Xueyuan/C-5613-2012; Li, Renfu/O-1949-2015
OI Chen, Xueyuan/0000-0003-0493-839X; Li, Renfu/0000-0003-1133-9109
NR 44
TC 72
Z9 74
U1 2
U2 27
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD JUL 17
PY 2008
VL 112
IS 28
BP 10370
EP 10377
DI 10.1021/jp801563k
PG 8
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 324TP
UT WOS:000257542600006
ER

PT J
AU Sorescu, DC
AF Sorescu, Dan C.
TI Plane-wave DFT investigations of the adsorption, diffusion, and
   activation of CO on kinked Fe(710) and Fe(310) surfaces
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; GENERALIZED GRADIENT APPROXIMATION;
   FISCHER-TROPSCH SYNTHESIS; TOTAL-ENERGY CALCULATIONS; SULFUR MODIFIED
   FE(100); DISSOCIATIVE ADSORPTION; FE(111) SURFACE; METAL SURFACES; 1ST
   PRINCIPLES; IRON SURFACES
AB The adsorption, diffusion, and dissociation properties of CO on kinked Fe(710) and Fe(310) surfaces have been analyzed using spin-polarized plane-wave density functional theory (DFT) calculations within the generalized gradient approximation (GGA). Several one-, two-, three- and 4-fold binding configurations have been identified among which the preferential adsorption takes place at a 4-fold hollow site near the top of the step while the one with the smallest activation energy for dissociation is located at a 4-fold site near the bottom of the step. In the case of the individual atomic species, the adsorption takes place preferentially at the hollow site for the C atom and at the pseudo 3-fold site on the step for the 0 atom. By the increase in coverage, there is an overall decrease of the adsorption energies for either molecular (CO) or atomic (C,O) species. The diffusion barriers among different local minima at the steps or on the terraces of both surfaces have been determined, and their values were found to be smaller than the barriers for CO dissociation. The most activated configuration at the bottom of the step can be populated by direct diffusion over the step, from the upper terrace, or by reorientation of the CO molecule within the same hollow site. This last process requires an activation energy of 6.5 kcal/mol on Fe(7 10) and 9.3 kcal/mol on the Fe(3 10) surface. The barrier heights for dissociation of CO molecules on Fe(710) (Fe(310)) were found to vary between 15.4 and 20.5 (16.7 and 20.9) kcal/mol depending on the specific location of the hollow site relative to the step edge and to the particular molecular orientation within a given hollow site. For the set of crystallographic Fe surfaces (110), (100), (211), (710), (310), and (111), we found that dissociation on Fe(710) and Fe(310) requires the smallest activation energies in the regime of low coverages. The analysis of the activation properties of CO on this six-member set of flat, stepped, and kinked surfaces indicates the existence of a direct correlation between the apparent activation energy and the rebonding energy of the noninteracting products of the reaction.
C1 US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
RP Sorescu, DC (reprint author), US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
NR 63
TC 29
Z9 29
U1 0
U2 32
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD JUL 17
PY 2008
VL 112
IS 28
BP 10472
EP 10489
DI 10.1021/jp8008145
PG 18
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 324TP
UT WOS:000257542600021
ER

PT J
AU Bernet, ML
   Miniati, F
   Lilly, SJ
   Kronberg, PP
   Dessauges-Zavadsky, M
AF Bernet, Martin L.
   Miniati, Francesco
   Lilly, Simon J.
   Kronberg, Philipp P.
   Dessauges-Zavadsky, Miroslava
TI Strong magnetic fields in normal galaxies at high redshift
SO NATURE
LA English
DT Article
ID ROTATION MEASURE DISTRIBUTION; FARADAY-ROTATION; ABSORPTION SYSTEMS;
   ALPHA SYSTEMS; TELESCOPE; DYNAMOS; SAMPLE; CLOUDS; LINES
AB The origin and growth of magnetic fields in galaxies is still something of an enigma(1). It is generally assumed that seed fields are amplified over time through the dynamo effect(2-5), but there are few constraints on the timescale. It was recently demonstrated that field strengths as traced by rotation measures of distant ( and hence ancient) quasars are comparable to those seen today(6), but it was unclear whether the high fields were in the unusual environments of the quasars themselves or distributed along the lines of sight. Here we report high- resolution spectra that demonstrate that the quasars with strong Mg II absorption lines are unambiguously associated with larger rotation measures. Because Mg II absorption occurs in the haloes of normal galaxies(7-11) along the sightlines to the quasars, this association requires that organized fields of surprisingly high strengths are associated with normal galaxies when the Universe was only about one- third of its present age.
C1 [Bernet, Martin L.; Miniati, Francesco; Lilly, Simon J.] ETH, Dept Phys, CH-8093 Zurich, Switzerland.
   [Kronberg, Philipp P.] Los Alamos Natl Lab, IGPP, Los Alamos, NM 87545 USA.
   [Kronberg, Philipp P.] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada.
   [Dessauges-Zavadsky, Miroslava] Univ Geneva, Observ Geneva, CH-1290 Sauverny, Switzerland.
RP Miniati, F (reprint author), ETH, Dept Phys, Wolfgang Pauli Str 16, CH-8093 Zurich, Switzerland.
EM fm@phys.ethz.ch
NR 27
TC 147
Z9 147
U1 1
U2 6
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
J9 NATURE
JI Nature
PD JUL 17
PY 2008
VL 454
IS 7202
BP 302
EP 304
DI 10.1038/nature07105
PG 3
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 326ND
UT WOS:000257665300031
PM 18633410
ER

PT J
AU Meyer, JC
   Girit, CO
   Crommie, MF
   Zettl, A
AF Meyer, Jannik C.
   Girit, C. O.
   Crommie, M. F.
   Zettl, A.
TI Imaging and dynamics of light atoms and molecules on graphene
SO NATURE
LA English
DT Article
ID FIELD ELECTRON-MICROSCOPY; CARBON NANOTUBES; SINGLE ATOMS; DEFECTS;
   SURFACE; RESOLUTION; CLUSTERS; CRYSTALS; OXYGEN
AB Observing the individual building blocks of matter is one of the primary goals of microscopy. The invention of the scanning tunnelling microscope(1) revolutionized experimental surface science in that atomic- scale features on a solid- state surface could finally be readily imaged. However, scanning tunnelling microscopy has limited applicability due to restrictions in, for example, sample conductivity, cleanliness, and data acquisition rate. An older microscopy technique, that of transmission electron microscopy (TEM)(2,3), has benefited tremendously in recent years from subtle instrumentation advances, and individual heavy ( high-atomic-number) atoms can now be detected by TEM(4-7) even when embedded within a semiconductor material(8,9). But detecting an individual low- atomic- number atom, for example carbon or even hydrogen, is still extremely challenging, if not impossible, via conventional TEM owing to the very low contrast of light elements(2,3,10) (-12). Here we demonstrate a means to observe, by conventional TEM, even the smallest atoms and molecules: on a clean single- layer graphene membrane, adsorbates such as atomic hydrogen and carbon can be seen as if they were suspended in free space. We directly image such individual adatoms, along with carbon chains and vacancies, and investigate their dynamics in real time. These techniques open a way to reveal dynamics of more complex chemical reactions or identify the atomic- scale structure of unknown adsorbates. In addition, the study of atomic- scale defects in graphene may provide insights for nanoelectronic applications of this interesting material.
C1 [Meyer, Jannik C.; Girit, C. O.; Crommie, M. F.; Zettl, A.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   [Meyer, Jannik C.; Girit, C. O.; Crommie, M. F.; Zettl, A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Meyer, JC (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM email@jannikmeyer.de; azettl@berkeley.edu
RI Meyer, Jannik/H-8541-2012; Girit, Caglar/D-4845-2014; Zettl,
   Alex/O-4925-2016
OI Meyer, Jannik/0000-0003-4023-0778; Girit, Caglar/0000-0001-8953-9261;
   Zettl, Alex/0000-0001-6330-136X
NR 30
TC 303
Z9 307
U1 23
U2 253
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
J9 NATURE
JI Nature
PD JUL 17
PY 2008
VL 454
IS 7202
BP 319
EP 322
DI 10.1038/nature07094
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 326ND
UT WOS:000257665300035
PM 18633414
ER

PT J
AU Sletten, EM
   Bertozzi, CR
AF Sletten, Ellen M.
   Bertozzi, Carolyn R.
TI A hydrophilic azacyclooctyne for Cu-free click chemistry
SO ORGANIC LETTERS
LA English
DT Article
ID IN-VIVO; AZIDE-ALKYNE; AQUEOUS SOLUBILITY; CHEMICAL-COMPOUNDS;
   MAMMALIAN-CELLS; LIVING SYSTEMS; COPPER-FREE; PROBES; CYCLOADDITION;
   PROTEINS
AB Biomolecules labeled with azides can be detected through Cu-free click chemistry with cyclooctyne probes, but their intrinsic hydrophobicity can compromise bioavailability. Here, we report the synthesis and evaluation of a novel azacyclooctyne, 6,7-dimethoxyazacyclooct-4-yne (DIMAC). Generated in nine steps from a glucose analogue, DIMAC reacted with azide-labeled proteins and cells similarly to cyclooctynes. However, its superior polarity and water solubility reduced nonspecific binding, thereby improving the sensitivity of azide detection.
C1 [Bertozzi, Carolyn R.] Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Howard Hughes Med Inst, Berkeley, CA 94720 USA.
RP Bertozzi, CR (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem, Berkeley, CA 94720 USA.
EM crb@berkeley.edu
FU NIGMS NIH HHS [R37 GM058867, GM058867, R01 GM058867]
NR 23
TC 148
Z9 149
U1 3
U2 44
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1523-7060
J9 ORG LETT
JI Org. Lett.
PD JUL 17
PY 2008
VL 10
IS 14
BP 3097
EP 3099
DI 10.1021/ol801141k
PG 3
WC Chemistry, Organic
SC Chemistry
GA 326AB
UT WOS:000257629200046
PM 18549231
ER

PT J
AU Davoudiasl, H
   Perez, G
   Soni, A
AF Davoudiasl, Hooman
   Perez, Gilad
   Soni, Amarjit
TI The little Randall-Sundrum model at the large hadron collider
SO PHYSICS LETTERS B
LA English
DT Article
ID COMPOSITE HIGGS-MODEL; GAUGE; HIERARCHY; VIOLATION; SYMMETRY; GEOMETRY;
   MIXINGS; PHYSICS; MASSES; FIELDS
AB We present a predictive warped model of flavor that is cut off at an ultraviolet scale O(10(3)) TeV. This "Little Randall-Sundrurn (LRS)" model is a volume-truncation, by a factor y approximate to 6, of the RS scenario and is holographically dual to dynamics with number of colors larger by y. The LRS couplings between Kaluza-Klein states and the Standard Model fields, including the proton constituents, are explicitly calculable without ad hoc assumptions. Assuming separate gauge and flavor dynamics, a number of unwanted contributions to precision electroweak, Zbb and flavor observables are suppressed in the LRS framework, compared with the corresponding RS case. An important consequence of the LRS truncation, independent of precise details, is a significant enhancement of the clean (golden) di-lepton LHC signals, by O(y(3)), due to a larger "rho-photon" mixing and a smaller inter-composite coupling. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Davoudiasl, Hooman; Soni, Amarjit] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
   [Perez, Gilad] SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA.
RP Davoudiasl, H (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
EM hooman@bnl.gov
NR 91
TC 53
Z9 53
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD JUL 17
PY 2008
VL 665
IS 2-3
BP 67
EP 71
DI 10.1016/j.physletb.2008.05.024
PG 5
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 331OI
UT WOS:000258021100002
ER

PT J
AU Shumaker, JL
   Crofcheck, C
   Tackett, SA
   Santillan-Jimenez, E
   Morgan, T
   Ji, Y
   Crocker, M
   Toops, TJ
AF Shumaker, J. Link
   Crofcheck, Czarena
   Tackett, S. Adam
   Santillan-Jimenez, Eduardo
   Morgan, Tonya
   Ji, Yaying
   Crocker, Mark
   Toops, Todd J.
TI Biodiesel synthesis using calcined layered double hydroxide catalysts
SO APPLIED CATALYSIS B-ENVIRONMENTAL
LA English
DT Article
DE transesterification; triglyceride; layered double hydroxide; lithium;
   aluminum
ID SOLID BASE CATALYSTS; SOYBEAN OIL; RAPESEED OIL; THERMAL-DECOMPOSITION;
   TRANSESTERIFICATION; SURFACE; MONOGLYCERIDES; HYDROTALCITES;
   DERIVATIVES; REACTIVITY
AB The catalytic properties of calcined Li-Al, Mg-Al and Mg-Fe layered double hydroxides (LDHs) were examined in two transesterification reactions, namely, the reaction of glyceryl tributyrate with methanol and the reaction of soybean oil with methanol. While the Li-All catalysts showed high activity in these reactions at the reflux temperature of methanol, the Mg-Fe and Mg-Al catalysts exhibited much lower methyl ester yields. CO2 TPD measurements revealed the presence of sites of weak, medium and strong basicity on both Mg-Al and Li-All catalysts, the latter showing higher concentrations of medium and strong base sites; by implication, these are the main sites active in transesterification catalyzed by calcined Li-Al LDHs. Maximum activity was observed for the Li-Al catalysts when a calcination temperature of 450-500 degrees C was applied, corresponding to decomposition of the layered double hydroxide to the mixed oxide without formation of crystalline lithium aluminate phases. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Shumaker, J. Link; Crofcheck, Czarena] Univ Kentucky, Lexington, KY 40546 USA.
   [Tackett, S. Adam; Santillan-Jimenez, Eduardo; Morgan, Tonya; Ji, Yaying; Crocker, Mark] Univ Kentucky, Ctr Appl Energy Res, Lexington, KY 40511 USA.
   [Toops, Todd J.] Oak Ridge Natl Lab, Fuels Engines & Emiss Res Ctr, Knoxville, TN 37932 USA.
RP Crofcheck, C (reprint author), Univ Kentucky, 128 CE Barnhart Bldg, Lexington, KY 40546 USA.
EM crofcheck@uky.edu; crocker@caer.uky.edu
RI Crocker, Mark/A-2704-2008; Ye, Peng/E-2742-2010; 
OI Santillan-Jimenez, Eduardo/0000-0002-1627-2719
NR 41
TC 93
Z9 93
U1 2
U2 49
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0926-3373
J9 APPL CATAL B-ENVIRON
JI Appl. Catal. B-Environ.
PD JUL 16
PY 2008
VL 82
IS 1-2
BP 120
EP 130
DI 10.1016/j.apcatb.2008.01.010
PG 11
WC Chemistry, Physical; Engineering, Environmental; Engineering, Chemical
SC Chemistry; Engineering
GA 330LO
UT WOS:000257943000013
ER

PT J
AU Appel, AM
   Lee, SJ
   Franz, JA
   DuBois, DL
   DuBois, MR
   Birnbaum, JC
   Twamleyt, B
AF Appel, Aaron M.
   Lee, Suh-Jane
   Franz, James A.
   DuBois, Daniel L.
   DuBois, M. Rakowski
   Birnbaum, Jerome C.
   Twamleyt, Brendan
TI Formation and reactivity of a persistent radical in a dinuclear
   molybdenum complex
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID CARBON-CENTERED RADICALS; HYDROGEN-ATOM TRANSFER; SULFIDO LIGANDS; CHAIN
   TRANSFER; SULFUR; DIMERS; KINETICS; BOND; POLYMERIZATIONS; DISSOCIATION
AB The reactivity of the S-H bond in Cp*Mo(mu-S)(2)(mu-SMe)(mu-SH)MoCp* (S4MeH) has been explored by determination of kinetics of hydrogen atom abstraction to form the radical CP*MO(mu-S)(3)(mu-SMe)MoCp* (S4Me.), as well as reaction of hydrogen with the radical-dimer equilibrium to reform the S-H complex. From the temperature dependent rate data for the abstraction of hydrogen atom by benzyl radical, Delta H-not equal and AS: were determined to be 1.54 +/- 0.25 kcal/mol and -25.5 +/- 0.8 cal/mol K, respectively, giving k(abs) = 1.3 x 10(6) M-1 s(-1) at 25 degrees C. In steady state abstraction kinetic experiments, the exclusive radical termination product of the Mo2S4 core was found to be the benzyl cross-termination product, Cp*Mo(mu-S)(2)(mu-SMe)(mu-SBz)MoCp* (S(4)MeBz), consistent with the Fischer-Ingold persistent radical effect. S4Me. was found to reversibly dimerize by formation of a weak bridging disulfide bond to form the tetranuclear complex (CP*Mo(mu-S)(2) mu-SMe)MoCP*)(2)(mu-S-2) ((S4Me)(2)). The radical-dimer equilibrium constant has been determined to be 5.7 x 10(4) +/- 2.1 x 10(4) M-1 from EPR data. The rate constant for dissociation of the dimer was found to be 1.1 x 10(3) s(-1) at 25 degrees C, based on variable temperature H-1 NMR data. The rate constant for dimerization of the radical has been estimated to be 6.5 x 10(7) M-1 S-1 in toluene at room temperature, based on the dimer dissociation rate constant and the equilibrium constant for dimerization. Structures are presented for (S4Me)(2), S(4)MeBz, and the cationic CP*Mo(mu-S-2)(mu-S)(mu-SMe)MoCp*(OTf) (S4Me+), a precursor of the radical and the alkylated derivatives. Evidence for a radical addition/elimination pathway at an Mo2S4 core is presented.
C1 [Appel, Aaron M.; Lee, Suh-Jane; Franz, James A.; DuBois, Daniel L.; DuBois, M. Rakowski; Birnbaum, Jerome C.] Pacific NW Natl Lab, Richland, WA 99352 USA.
   [Twamleyt, Brendan] Univ Idaho, Dept Chem, Moscow, ID 83844 USA.
RP Franz, JA (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA.
EM james.franz@pnl.gov
OI Appel, Aaron/0000-0002-5604-1253
NR 56
TC 7
Z9 7
U1 0
U2 16
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD JUL 16
PY 2008
VL 130
IS 28
BP 8940
EP 8951
DI 10.1021/ja078115r
PG 12
WC Chemistry, Multidisciplinary
SC Chemistry
GA 324GY
UT WOS:000257507400024
PM 18564842
ER

PT J
AU Li, SC
   Zhang, Z
   Sheppard, D
   Kay, BD
   White, JM
   Du, Y
   Lyubinetsky, I
   Henkelman, G
   Dohnalek, Z
AF Li, Shao-Chun
   Zhang, Zhenrong
   Sheppard, Daniel
   Kay, Bruce D.
   White, J. M.
   Du, Yingge
   Lyubinetsky, Igor
   Henkelman, Graerne
   Dohnalek, Zdenek
TI Intrinsic diffusion of hydrogen on rutile TiO2(110)
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID OXIDIZED TIO2(110); OXYGEN VACANCIES; OH GROUPS; SURFACE; TIO2; WATER;
   H2O; O-2; DISSOCIATION; PSEUDOPOTENTIALS
AB The combined experimental and theoretical study of intrinsic hydrogen diffusion on bridge-bonded oxygen (BBO) rows of TiO2(110) is presented. Sequences of isothermal scanning tunneling microscopy images demonstrate a complex behavior of hydrogen formed by water dissociation on BBO vacancies. Different diffusion rates are observed for the two hydrogens in the original geminate OH pair suggesting the presence of a long-lived polaronic state. For the case of separated hydroxyls, both theory and experiment yield comparable temperature-dependent diffusion rates. Density functional theory calculations show that there are two comparable low energy diffusion pathways for hydrogen motion along the BBO from one BBO to its neighbor, one by a direct hop and the other by an intermediate minimum at a terrace O. The values of kinetic parameters (prefactors and diffusion barriers) determined experimentally and theoretically are significantly different and indicate the presence of a more complex diffusion mechanism. We speculate that the hydrogen diffusion proceeds via a two-step mechanism: the initial diffusion of localized charge, followed by the diffusion of hydrogen. Both experiment and theory show the presence of repulsive OH-OH interactions.
C1 [Li, Shao-Chun; Sheppard, Daniel; White, J. M.; Henkelman, Graerne; Dohnalek, Zdenek] Univ Texas Austin, Dept Chem & Biochem, Ctr Mat Chem, Austin, TX 78712 USA.
   [Zhang, Zhenrong; Kay, Bruce D.; White, J. M.; Dohnalek, Zdenek] Pacific NW Natl Lab, Fundamental & Computat Sci Directorate, Richland, WA 99352 USA.
   [Zhang, Zhenrong; Kay, Bruce D.; White, J. M.; Du, Yingge; Lyubinetsky, Igor; Dohnalek, Zdenek] Inst Interfacial Catalysis, Richland, WA 99352 USA.
   [Du, Yingge; Lyubinetsky, Igor] Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA.
RP Henkelman, G (reprint author), Univ Texas Austin, Dept Chem & Biochem, Ctr Mat Chem, Austin, TX 78712 USA.
EM Henkelman@mail.utexas.edu; Zdenek.Dohnalek@pnl.gov
RI Henkelman, Graeme/A-9301-2008; 
OI Henkelman, Graeme/0000-0002-0336-7153; Zhang,
   Zhenrong/0000-0003-3969-2326; Dohnalek, Zdenek/0000-0002-5999-7867
NR 42
TC 79
Z9 79
U1 5
U2 72
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD JUL 16
PY 2008
VL 130
IS 28
BP 9080
EP 9088
DI 10.1021/ja8012825
PG 9
WC Chemistry, Multidisciplinary
SC Chemistry
GA 324GY
UT WOS:000257507400039
PM 18563900
ER

PT J
AU Zhai, HJ
   Burgel, C
   Bonacic-Koutecky, V
   Wang, LS
AF Zhai, Hua-Jin
   Buergel, Christian
   Bonacic-Koutecky, Vlasta
   Wang, Lai-Sheng
TI Probing the electronic structure and chemical bonding of gold oxides and
   sulfides in AuOn- and AuSn- (n=1, 2)
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID CATALYTIC CO OXIDATION; ANION PHOTOELECTRON-SPECTROSCOPY; MOLECULAR
   OXYGEN COMPLEXES; TRANSITION-METAL CLUSTERS; SUPPORTED GOLD; VIBRATIONAL
   SPECTROSCOPY; CARBON-MONOXIDE; SPIN-RESONANCE; O-2; SPECTRA
AB The Au-O and Au-S interactions are essential in nanogold catalysis and nanotechnology, for which monogold oxide and sulfide clusters serve as the simplest molecular models. We report a combined photoelectron spectroscopy and ab initio study on AuO- and AuO2- and their valent isoelectronic AuS- and AuS2- species to probe their electronic structure and to elucidate the Au-O and Au-S chemical bonding. Vibrationally resolved spectra were obtained at different photon energies, providing a wealth of electronic structure information for each species. Similar spectra were observed for AuO- and AuS- and for the linear OAuO- and SAuS- species. A bent isomer was also observed as Au(S-2)(-) in the AuS2- spectra, whereas a similar Au(O-2)(-) complex was not observed in the case of AuO2-. High-level ab initio calculations were conducted to aid spectral assignments and provide insight into the chemical bonding in the AuX- and AuX2- molecules. Excellent agreement is achieved between the calculated electronic excitations and the observed spectra. Configuration interactions and spin-orbit couplings were shown to be important and were necessary to achieve good agreement between theory and experiment. Strong covalent bonding was found in both the AuX- and the XAuX- species with multiple bonding characters. While Au(S2)- was found to be a low-lying isomer with a significant binding energy, Au(O-2)(-) was shown to be unbound consistent with the experimental observation. The latter is understood in the context of the size-dependent reactivity of Au-n(-) clusters with O-2.
C1 [Buergel, Christian; Bonacic-Koutecky, Vlasta] Humboldt Univ, Inst Chem, D-12489 Berlin, Germany.
   [Zhai, Hua-Jin; Wang, Lai-Sheng] Washington State Univ, Dept Phys, Richland, WA 99354 USA.
   [Zhai, Hua-Jin; Wang, Lai-Sheng] Pacific NW Natl Lab, Chem & Mat Sci Div, Richland, WA 99352 USA.
RP Bonacic-Koutecky, V (reprint author), Humboldt Univ, Inst Chem, Brook Taylor Str 2, D-12489 Berlin, Germany.
EM vbk@chemie.hu-berlin.de; ls.wang@pnl.gov
NR 73
TC 52
Z9 52
U1 1
U2 40
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD JUL 16
PY 2008
VL 130
IS 28
BP 9156
EP 9167
DI 10.1021/ja802408b
PG 12
WC Chemistry, Multidisciplinary
SC Chemistry
GA 324GY
UT WOS:000257507400048
PM 18557613
ER

PT J
AU Fischer, NO
   Tok, JBH
   Tarasow, TM
AF Fischer, Nicholas O.
   Tok, Jeffrey B. -H.
   Tarasow, Theodore M.
TI Massively Parallel Interrogation of Aptamer Sequence, Structure and
   Function
SO PLOS ONE
LA English
DT Article
AB Background: Optimization of high affinity reagents is a significant bottleneck in medicine and the life sciences. The ability to synthetically create thousands of permutations of a lead high-affinity reagent and survey the properties of individual permutations in parallel could potentially relieve this bottleneck. Aptamers are single stranded oligonucleotides affinity reagents isolated by in vitro selection processes and as a class have been shown to bind a wide variety of target molecules.
   Methodology/Principal Findings: High density DNA microarray technology was used to synthesize, in situ, arrays of approximately 3,900 aptamer sequence permutations in triplicate. These sequences were interrogated on-chip for their ability to bind the fluorescently-labeled cognate target, immunoglobulin E, resulting in the parallel execution of thousands of experiments. Fluorescence intensity at each array feature was well resolved and shown to be a function of the sequence present. The data demonstrated high intra- and inter-chip correlation between the same features as well as among the sequence triplicates within a single array. Consistent with aptamer mediated IgE binding, fluorescence intensity correlated strongly with specific aptamer sequences and the concentration of IgE applied to the array.
   Conclusion and Significance: The massively parallel sequence-function analyses provided by this approach confirmed the importance of a consensus sequence found in all 21 of the original IgE aptamer sequences and support a common stem: loop structure as being the secondary structure underlying IgE binding. The microarray application, data and results presented illustrate an efficient, high information content approach to optimizing aptamer function. It also provides a foundation from which to better understand and manipulate this important class of high affinity biomolecules.
C1 [Fischer, Nicholas O.; Tok, Jeffrey B. -H.] Lawrence Livermore Natl Lab, Chem Mat Earth & Life Sci Directorate, Livermore, CA 94550 USA.
   [Tarasow, Theodore M.] Tethys Biosci Inc, Emeryville, CA USA.
RP Fischer, NO (reprint author), Lawrence Livermore Natl Lab, Chem Mat Earth & Life Sci Directorate, Livermore, CA 94550 USA.
EM ttarasow@tethysbio.com
FU Biosecurity and Nanosciecnes Laboratory at Lawrence Livermore National
   Laboratory; Tethys Bioscience
FX This work was supported by the Biosecurity and Nanosciecnes Laboratory
   at Lawrence Livermore National Laboratory and by Tethys Bioscience.
   Sponsors reviewed and approved manuscript.
NR 20
TC 28
Z9 29
U1 1
U2 9
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD JUL 16
PY 2008
VL 3
IS 7
AR e2720
DI 10.1371/journal.pone.0002720
PG 9
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 417DX
UT WOS:000264057200058
PM 18628955
ER

PT J
AU Adams, KL
   Steele, PT
   Bogan, MJ
   Sadler, NM
   Martin, SI
   Martin, AN
   Frank, M
AF Adams, Kristl L.
   Steele, Paul T.
   Bogan, Michael J.
   Sadler, Nicole M.
   Martin, Sue I.
   Martin, Audrey N.
   Frank, Matthias
TI Reagentless detection of Mycobacteria tuberculosis H37Ra in respiratory
   effluents in minutes
SO ANALYTICAL CHEMISTRY
LA English
DT Article
ID BIOAEROSOL MASS-SPECTROMETRY; PULMONARY TUBERCULOSIS; SPECTRAL
   SIGNATURES; CLINICAL SPECIMENS; PARTICLES; BIOMARKERS; SPORES
AB Two similar mycobacteria, Mycobacteria tuberculosis H37Ra and Mycobacteria smegmatis are rapidly detected and identified within samples containing a complex background of respiratory effluents using single-particle aerosol mass spectrometry (SPAMS). M.. tuberculosis H37Ra (TBa), an avirulent strain, is used as a surrogate for virulent tuberculosis; M. smegmatis (MSm) is utilized as a near-neighbor confounder for TBa. Bovine lung surfactant and human exhaled breath condensate are used as first-order surrogates for infected human lung expirations from patients with pulmonary tuberculosis. This simulated background sputum is mixed with TBa or MSm and nebulized to produce conglomerate aerosol particles, single particles that contain a bacterium embedded within a background respiratory matrix. Mass spectra of single conglomerate particles exhibit ions associated with both respiratory effluents and mycobacteria. Spectral features distinguishing TBa from MSm in pure and conglomerate particles are shown. SPAMS pattern matching alarm algorithms are able to distinguish TBa-containing particles from background matrix and MSm for > 50% of the test particles, which is sufficient to enable a high probability of detection and a low false alarm rate if an adequate number of such particles are present. These results indicate the potential usefulness of SPAMS for rapid, reagentless tuberculosis screening.
C1 [Adams, Kristl L.; Steele, Paul T.; Bogan, Michael J.; Sadler, Nicole M.; Martin, Sue I.; Martin, Audrey N.; Frank, Matthias] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   [Sadler, Nicole M.] Univ Calif Davis, Davis, CA 95616 USA.
   [Martin, Audrey N.] Michigan State Univ, E Lansing, MI 48824 USA.
RP Frank, M (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM frank1@llnl.gov
RI Adams, Kristl/A-5748-2009; Bogan, Mike/I-6962-2012; Frank,
   Matthias/O-9055-2014; 
OI Bogan, Mike/0000-0001-9318-3333; Sadler, Nicole/0000-0003-2395-4467
NR 24
TC 7
Z9 7
U1 0
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0003-2700
J9 ANAL CHEM
JI Anal. Chem.
PD JUL 15
PY 2008
VL 80
IS 14
BP 5350
EP 5357
DI 10.1021/ac8002825
PG 8
WC Chemistry, Analytical
SC Chemistry
GA 325OL
UT WOS:000257598100011
PM 18558726
ER

PT J
AU Ibrahim, YM
   Belov, ME
   Liyu, AV
   Smith, RD
AF Ibrahim, Yehia M.
   Belov, Mikhail E.
   Liyu, Andrei V.
   Smith, Richard D.
TI Automated gain control ion funnel trap for orthogonal time-offlight mass
   Spectrometry
SO ANALYTICAL CHEMISTRY
LA English
DT Article
ID OF-FLIGHT; CYCLOTRON RESONANCE; INTERFACE; SENSITIVITY; MS;
   ACCUMULATION; BIOMOLECULES; THROUGHPUT; PROTEOMICS
AB Time-of-flight mass spectrometry (TOF MS) is increasingly used in proteomics research. Herein, we report on the development and characterization of a TOF MS instrument with improved sensitivity equipped with an electrodynamic ion funnel trap (IFT) that employs an automated gain control (AGC) capability. The IFr-TOF MS was coupled to a reversed-phase capillary liquid chromatography (RPLC) separation and evaluated in experiments with complex proteolytic digests. When applied to a global tryptic digest of Shewanella oneidensis proteins, an order of-magnitude increase in sensitivity compared to that of the conventional continuous mode of operation was achieved due to efficient ion accumulation prior to TOF MS analysis. As a result of this sensitivity improvement and related improvement in mass measurement accuracy, the number of unique peptides identified in the AGC-IFT mode was 5-fold greater than that obtained in the continuous mode.
C1 [Ibrahim, Yehia M.; Belov, Mikhail E.; Liyu, Andrei V.; Smith, Richard D.] Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA.
RP Belov, ME (reprint author), Pacific NW Natl Lab, Div Biol Sci, POB 999, Richland, WA 99352 USA.
EM mikhail.belov@pnl.gov
RI Smith, Richard/J-3664-2012
OI Smith, Richard/0000-0002-2381-2349
FU NCRR NIH HHS [P41 RR018522, P41 RR018522-06, RR018522]; NIAID NIH HHS
   [Y1-AI-4894-01]
NR 32
TC 18
Z9 18
U1 1
U2 10
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0003-2700
J9 ANAL CHEM
JI Anal. Chem.
PD JUL 15
PY 2008
VL 80
IS 14
BP 5367
EP 5376
DI 10.1021/ac8003488
PG 10
WC Chemistry, Analytical
SC Chemistry
GA 325OL
UT WOS:000257598100013
PM 18512944
ER

PT J
AU Kelly, RT
   Page, JS
   Marginean, I
   Tang, KQ
   Smith, RD
AF Kelly, Ryan T.
   Page, Jason S.
   Marginean, Ioan
   Tang, Keqi
   Smith, Richard D.
TI Nanoelectrospray emitter arrays providing interemitter electric field
   uniformity
SO ANALYTICAL CHEMISTRY
LA English
DT Article
ID IONIZATION-MASS-SPECTROMETRY; TRANSMISSION EFFICIENCY; ELECTROSPRAY
   EMITTERS; THRUSTER APPLICATIONS; ION TRANSMISSION; SCALE-UP;
   SENSITIVITY; INTERFACE; ATOMIZATION; GENERATION
AB Arrays of electrospray ionization (ESI) emitters have been reported Previously as a means of enhancing ionization efficiency or signal intensity. A key challenge when working with multiple, closely spaced ESI emitters is overcoming the deleterious effects caused by electrical interference among neighboring emitters. Individual. emitters can experience different electric fields depending on their relative position in the array, such that it becomes difficult to operate all of the emitters optimally for a given applied potential. In this work, we have developed multi-nanoESI emitters arranged with a circular pattern, which enable the constituent emitters to experience a uniform electric field. The performance of the circular emitter array was compared to a single emitter and to a previously developed linear emitter array, which verified that improved electric field uniformity was achieved with the circular arrangement. The circular arrays were also interfaced with a mass spectrometer via a matching multicapillary inlet, and the results were compared with those obtained using a single emitter. By minimizing interemitter electric field inhomogeneities, much larger arrays having closer emitter spacing should be feasible.
C1 [Kelly, Ryan T.; Page, Jason S.; Marginean, Ioan; Tang, Keqi; Smith, Richard D.] Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA.
RP Smith, RD (reprint author), Pacific NW Natl Lab, Div Biol Sci, POB 999, Richland, WA 99352 USA.
EM rds@pnl.gov
RI Marginean, Ioan/A-4183-2008; Kelly, Ryan/B-2999-2008; Smith,
   Richard/J-3664-2012
OI Marginean, Ioan/0000-0002-6693-0361; Kelly, Ryan/0000-0002-3339-4443;
   Smith, Richard/0000-0002-2381-2349
FU NCRR NIH HHS [P41 RR018522, P41 RR018522-05]
NR 21
TC 28
Z9 28
U1 1
U2 34
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0003-2700
J9 ANAL CHEM
JI Anal. Chem.
PD JUL 15
PY 2008
VL 80
IS 14
BP 5660
EP 5665
DI 10.1021/ac800508q
PG 6
WC Chemistry, Analytical
SC Chemistry
GA 325OL
UT WOS:000257598100052
PM 18553942
ER

PT J
AU Miller, CS
   Eisenberg, D
AF Miller, Christopher S.
   Eisenberg, David
TI Using inferred residue contacts to distinguish between correct and
   incorrect protein models
SO BIOINFORMATICS
LA English
DT Article
ID MULTIPLE SEQUENCE ALIGNMENTS; STRUCTURE PREDICTION; EVOLUTIONARY
   INFORMATION; CORRELATED MUTATIONS; CONSERVATION; RESTRAINTS; NETWORKS;
   FAMILIES; VIRUS; CASP7
AB Motivation: The de novo prediction of 3D protein structure is enjoying a period of dramatic improvements. Often, a remaining difficulty is to select the model closest to the true structure from a group of low-energy candidates. To what extent can inter-residue contact predictions from multiple sequence alignments, information which is orthogonal to that used in most structure prediction algorithms, be used to identify those models most similar to the native protein structure
   Results: We present a Bayesian inference procedure to identify residue pairs that are spatially proximal in a protein structure. The method takes as input a multiple sequence alignment, and outputs an accurate posterior probability of proximity for each residue pair. We exploit a recent metagenomic sequencing project to create large, diverse and informative multiple sequence alignments for a test set of 1656 known protein structures. The method infers spatially proximal residue pairs in this test set with good accuracy: top-ranked predictions achieve an average accuracy of 38 (for an average 21-fold improvement over random predictions) in cross-validation tests. Notably, the accuracy of predicted 3D models generated by a range of structure prediction algorithms strongly correlates with how well the models satisfy probable residue contacts inferred via our method. This correlation allows for confident rejection of incorrect structural models.
C1 [Miller, Christopher S.; Eisenberg, David] Univ Calif Los Angeles, UCLA DOE Inst Genom & Prote, Inst Mol Biol, Los Angeles, CA 90095 USA.
   [Eisenberg, David] Univ Calif Los Angeles, Howard Hughes Med Inst, Dept Chem & Biochem, Los Angeles, CA 90095 USA.
   [Eisenberg, David] Univ Calif Los Angeles, Howard Hughes Med Inst, Dept Biol Chem, Los Angeles, CA 90095 USA.
RP Eisenberg, D (reprint author), Univ Calif Los Angeles, UCLA DOE Inst Genom & Prote, Inst Mol Biol, Box 951570, Los Angeles, CA 90095 USA.
EM david@mbi.ucla.edu
OI Miller, Christopher/0000-0002-9448-8144
FU Howard Hughes Medical Institute; NIGMS NIH HHS [GM07185]
NR 47
TC 24
Z9 24
U1 0
U2 1
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 1367-4803
J9 BIOINFORMATICS
JI Bioinformatics
PD JUL 15
PY 2008
VL 24
IS 14
BP 1575
EP 1582
DI 10.1093/bioinformatics/btn248
PG 8
WC Biochemical Research Methods; Biotechnology & Applied Microbiology;
   Computer Science, Interdisciplinary Applications; Mathematical &
   Computational Biology; Statistics & Probability
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
   Computer Science; Mathematical & Computational Biology; Mathematics
GA 325GC
UT WOS:000257576000003
PM 18511466
ER

PT J
AU Thurmond, J
   Yoon, H
   Kuiken, C
   Yusim, K
   Perkins, S
   Theiler, J
   Bhattacharya, T
   Korber, B
   Fischer, W
AF Thurmond, James
   Yoon, Hyejin
   Kuiken, Carla
   Yusim, Karina
   Perkins, Simon
   Theiler, James
   Bhattacharya, Tanmoy
   Korber, Bette
   Fischer, Will
TI Web-based design and evaluation of T-cell vaccine candidates
SO BIOINFORMATICS
LA English
DT Article
AB We present a suite of on-line tools to design candidate vaccine proteins, and to assess antigen potential, using coverage of k-mers (as proxies for potential T-cell epitopes) as a metric. The vaccine design tool uses the recently published mosaic method to generate protein sequences optimized for coverage of high-frequency k-mers; the coverage-assessment tools facilitate coverage comparisons for any potential antigens. To demonstrate these tools, we designed mosaic protein sets for B-clade HIV-1 Gag, Pol and Nef, and compared them to antigens used in a recent human vaccine trial.
C1 [Thurmond, James; Yoon, Hyejin; Kuiken, Carla; Yusim, Karina; Theiler, James; Bhattacharya, Tanmoy; Korber, Bette; Fischer, Will] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Perkins, Simon] UltraSpectral Inc, Albuquerque, NM 87113 USA.
   [Bhattacharya, Tanmoy; Korber, Bette] Santa Fe Inst, Santa Fe, NM 87501 USA.
RP Fischer, W (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM wfischer@lanl.go
RI Fischer, Will/B-1323-2013; Bhattacharya, Tanmoy/J-8956-2013; 
OI Fischer, Will/0000-0003-4579-4062; Bhattacharya,
   Tanmoy/0000-0002-1060-652X; Korber, Bette/0000-0002-2026-5757
FU NIAID NIH HHS [P01 AI61734]
NR 7
TC 25
Z9 26
U1 0
U2 3
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 1367-4803
J9 BIOINFORMATICS
JI Bioinformatics
PD JUL 15
PY 2008
VL 24
IS 14
BP 1639
EP 1640
DI 10.1093/bioinformatics/btn251
PG 2
WC Biochemical Research Methods; Biotechnology & Applied Microbiology;
   Computer Science, Interdisciplinary Applications; Mathematical &
   Computational Biology; Statistics & Probability
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
   Computer Science; Mathematical & Computational Biology; Mathematics
GA 325GC
UT WOS:000257576000012
PM 18515277
ER

PT J
AU Choi, CH
   Rapti, Z
   Gelev, V
   Hacker, MR
   Alexandrov, B
   Park, EJ
   Park, JS
   Horikoshi, N
   Smerzi, A
   Rasmussen, KO
   Bishop, AR
   Usheva, A
AF Choi, Chu H.
   Rapti, Zoi
   Gelev, Vladimir
   Hacker, Michele R.
   Alexandrov, Boian
   Park, Evelyn J.
   Park, Jae Suk
   Horikoshi, Nobuo
   Smerzi, Augusto
   Rasmussen, Kim O.
   Bishop, Alan R.
   Usheva, Anny
TI Profiling the thermodynamic softness of adenoviral promoters
SO BIOPHYSICAL JOURNAL
LA English
DT Article
ID MAJOR LATE PROMOTER; PROTEIN-DNA RECOGNITION; 2 TRANSCRIPTION FACTORS;
   CAMP RESPONSE ELEMENT; POLYPEPTIDE-IX GENE; TATA-LESS PROMOTER; RNA
   POLYMERASE-II; ELA-LIKE ACTIVITY; START SITES; STIMULATES TRANSCRIPTION
AB We showed previously that anharmonic DNA dynamical features correlate with transcriptional activity in selected viral promoters, and hypothesized that areas of DNA softness may represent loci of functional significance. The nine known promoters from human adenovirus type 5 were analyzed for inherent DNA softness using the Peyrard-Bishop-Dauxois model and a statistical mechanics approach, using a transfer integral operator. We found a loosely defined pattern of softness peaks distributed both upstream and downstream of the transcriptional start sites, and that early transcriptional regions tended to be softer than late promoter regions. When reported transcription factor binding sites were superimposed on our calculated softness profiles, we observed a close correspondence in many cases, which suggests that DNA duplex breathing dynamics may play a role in protein recognition of specific nucleotide sequences and protein-DNA binding. These results suggest that genetic information is stored not only in explicit codon sequences, but also may be encoded into local dynamic and structural features, and that it may be possible to access this obscured information using DNA dynamics calculations.
C1 [Choi, Chu H.; Rapti, Zoi; Gelev, Vladimir; Park, Evelyn J.; Park, Jae Suk; Usheva, Anny] Beth Israel Deaconess Med Ctr, Dept Med, Boston, MA 02215 USA.
   [Choi, Chu H.; Rapti, Zoi; Gelev, Vladimir; Hacker, Michele R.; Park, Evelyn J.; Park, Jae Suk; Usheva, Anny] Harvard Univ, Sch Med, Boston, MA USA.
   [Rapti, Zoi] Univ Illinois, Dept Math, Urbana, IL 61801 USA.
   [Hacker, Michele R.] Beth Israel Deaconess Med Ctr, Dept Obstet & Gynecol, Boston, MA 02215 USA.
   [Alexandrov, Boian; Smerzi, Augusto; Rasmussen, Kim O.; Bishop, Alan R.] Los Alamos Natl Lab, Ctr Nonlinear Studies, Div Theoret, Los Alamos, NM 87545 USA.
   [Horikoshi, Nobuo] Washington Univ, Dept Radiat Oncol, Sch Med, St Louis, MO USA.
RP Choi, CH (reprint author), Beth Israel Deaconess Med Ctr, Dept Med, Boston, MA 02215 USA.
EM cchoi@bidmc.harvard.edu
RI Rasmussen, Kim/B-5464-2009; Alexandrov, Boian/D-2488-2010; 
OI Rasmussen, Kim/0000-0002-4029-4723; Alexandrov,
   Boian/0000-0001-8636-4603; Hacker, Michele/0000-0003-0217-9991
FU NHLBI NIH HHS [R01 HL062458]; NIGMS NIH HHS [R01 GM073911]
NR 71
TC 14
Z9 14
U1 0
U2 1
PU BIOPHYSICAL SOC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA
SN 0006-3495
J9 BIOPHYS J
JI Biophys. J.
PD JUL 15
PY 2008
VL 95
IS 2
BP 597
EP 608
DI 10.1529/biophysj.107.123471
PG 12
WC Biophysics
SC Biophysics
GA 318WG
UT WOS:000257122900015
PM 18390611
ER

PT J
AU Miller, CE
   Majewski, J
   Watkins, EB
   Kuhl, TL
AF Miller, C. E.
   Majewski, J.
   Watkins, E. B.
   Kuhl, T. L.
TI Part I: An x-ray scattering study of cholera toxin penetration and
   induced phase transformations in lipid membranes
SO BIOPHYSICAL JOURNAL
LA English
DT Article
ID GRAZING-INCIDENCE DIFFRACTION; AIR-WATER-INTERFACE; CRYSTAL-STRUCTURE;
   PROTEIN-BINDING; ACID MONOLAYERS; GANGLIOSIDE GM1; INDUCED FUSION;
   PHOSPHATIDYLCHOLINE; CALCIUM; MODEL
AB Cholera toxin is a highly efficient biotoxin, which is frequently used as a tool to investigate protein-membrane interactions and as a reporter for membrane rafts. Cholera toxin binds selectively to gangliosides with highest affinity to GM(1). However, the mechanism by which cholera toxin crosses the membrane remains unresolved. Using x-ray reflectivity and grazing incidence diffraction, we have been able to monitor the binding and penetration of cholera toxin into a model lipid monolayer containing the receptor GM1 at the air-water interface. Very high toxin coverage was obtained allowing precise measurements of how toxin binding alters lipid packing. Grazing incidence x-ray diffraction revealed the coexistence of two monolayer phases after toxin binding. The first was identical to the monolayer before toxin binding. In regions where toxin was bound, a second membrane phase exhibited a decrease in order as evidenced by a larger area per molecule and tilt angle with concomitant thinning of the monolayer. These results demonstrate that cholera toxin binding induces the formation of structurally distinct, less ordered domains in gel phases. Furthermore, the largest decrease in lateral order to the monolayer occurred at low pH, supporting a low endosomal pH in the infection pathway. Surprisingly, at pH 8 toxin penetration by the binding portion of the toxin, the B-5 pentamer, was also observed.
C1 [Kuhl, T. L.] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
   [Miller, C. E.; Majewski, J.; Watkins, E. B.] Los Alamos Natl Lab, Manuel Lujan Jr Neutron Scattering Ctr, Los Alamos, NM 87545 USA.
   [Kuhl, T. L.] Univ Calif Davis, Dept Biomed Engn, Davis, CA 95616 USA.
   [Watkins, E. B.] Univ Calif Davis, Biophys Grad Grp, Davis, CA 95616 USA.
RP Kuhl, TL (reprint author), Univ Calif Davis, Dept Chem Engn, 1 Shields Ave, Davis, CA 95616 USA.
EM tlkuhl@ucdavis.edu
RI Lujan Center, LANL/G-4896-2012
NR 35
TC 14
Z9 15
U1 1
U2 9
PU BIOPHYSICAL SOC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA
SN 0006-3495
J9 BIOPHYS J
JI Biophys. J.
PD JUL 15
PY 2008
VL 95
IS 2
BP 629
EP 640
DI 10.1529/biophysj.107.120725
PG 12
WC Biophysics
SC Biophysics
GA 318WG
UT WOS:000257122900018
PM 18359802
ER

PT J
AU Miller, CE
   Majewski, J
   Watkins, EB
   Weygand, M
   Kuhl, TL
AF Miller, C. E.
   Majewski, J.
   Watkins, E. B.
   Weygand, M.
   Kuhl, T. L.
TI Part II: Diffraction from two-dimensional cholera toxin crystals bound
   to their receptors in a lipid monolayer
SO BIOPHYSICAL JOURNAL
LA English
DT Article
ID GRAZING-INCIDENCE DIFFRACTION; AIR-WATER-INTERFACE; X-RAY-DIFFRACTION;
   AIR/WATER INTERFACE; PROJECTED STRUCTURE; LAYER; SCATTERING; COMPLEXES;
   MEMBRANE
AB The structure of cholera toxin (CTAB(5)) bound to its putative ganglioside receptor, galactosyl-N-acetylgalactosaminyl (N-acetyl-neuraminyl) galactosylglucosylceramide (GM(1)), in a lipid monolayer at the air-water interface has been studied utilizing grazing incidence x-ray diffraction. Cholera toxin is one of very few proteins to be crystallized in two dimensions and characterized in a fully hydrated state. The observed grazing incidence x-ray diffraction Bragg peaks indicated cholera toxin was ordered in a hexagonal lattice and the order extended 600-800 angstrom. The pentameric binding portion of cholera toxin (CTB5) improved in-plane ordering over the full toxin (CTAB(5)) especially at low pH. Disulfide bond reduction (activation of the full toxin) also increased the protein layer ordering. These findings are consistent with A-subunit flexibility and motion, which cause packing inefficiencies and greater disorder of the protein layer. Corroborative out-of-plane diffraction (Bragg rod) analysis indicated that the scattering units in the cholera layerwith CTAB(5) shortened after disulfide bond reduction of the A subunit. These studies, together with Part I results, revealed key changes in the structure of the cholera toxin-lipid system under different pH conditions.
C1 [Miller, C. E.; Majewski, J.; Watkins, E. B.] Los Alamos Natl Lab, Manuel Lujan Jr Neutron Scattering Ctr, LANSCE 12, Los Alamos, NM 87545 USA.
   [Weygand, M.] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA.
   [Kuhl, T. L.] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
   [Kuhl, T. L.] Univ Calif Davis, Dept Biomed Engn, Davis, CA 95616 USA.
   [Watkins, E. B.] Univ Calif Davis, Biophys Grad Grp, Davis, CA 95616 USA.
RP Majewski, J (reprint author), Los Alamos Natl Lab, Manuel Lujan Jr Neutron Scattering Ctr, LANSCE 12, Los Alamos, NM 87545 USA.
EM jarek@lanl.gov
RI Lujan Center, LANL/G-4896-2012
NR 16
TC 6
Z9 7
U1 0
U2 7
PU BIOPHYSICAL SOC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA
SN 0006-3495
J9 BIOPHYS J
JI Biophys. J.
PD JUL 15
PY 2008
VL 95
IS 2
BP 641
EP 647
DI 10.1529/biophysj.107.120808
PG 7
WC Biophysics
SC Biophysics
GA 318WG
UT WOS:000257122900019
PM 18359801
ER

PT J
AU Deng, H
   Brewer, S
   Vu, DM
   Clinch, K
   Callender, R
   Dyer, RB
AF Deng, Hua
   Brewer, Scott
   Vu, Dung M.
   Clinch, Keith
   Callender, Robert
   Dyer, R. Brian
TI On the pathway of forming enzymatically productive ligand-protein
   complexes in lactate dehydrogenase
SO BIOPHYSICAL JOURNAL
LA English
DT Article
ID CATALYSIS; BINDING; SUBSTRATE; DYNAMICS; ENZYMES; STEREOSPECIFICITY;
   ACTIVATION; NADH
AB We have carried out a series of studies on the binding of a substrate mimic to the enzyme lactate dehydrogenase (LDH) using advanced kinetic approaches, which begin to provide a molecular picture of the dynamics of ligand binding for this protein. Binding proceeds via a binding-competent subpopulation of the nonligated form of the protein (the LDH/NADH binary complex) to form a protein-ligand encounter complex. The work here describes the collapse of the encounter complex to form the catalytically competent Michaelis complex. Isotope-edited static Fourier transform infrared studies on the bound oxamate protein complex reveal two kinds of oxamate environments: 1), a major populated structure wherein all significant hydrogen-bonding patterns are formed at the active site between protein and bound ligand necessary for the catalytically productive Michaelis complex and 2), a minor structure in a configuration of the active site that is unfavorable to carry out catalyzed chemistry. This latter structure likely simulates a dead-end complex in the reaction mixture. Temperature jump isotope-edited transient infrared studies on the binding of oxamate with LDH/NADH suggest that the evolution of the encounter complex between LDH/NADH and oxamate collapses via a branched reaction pathway to form the major and minor bound species. The production of the catalytically competent protein-substrate complex has strong similarities to kinetic pathways found in two-state protein folding processes. Once the encounter complex is formed between LDH/NADH and substrate, the ternary protein-ligand complex appears to "fold'' to form a compact productive complex in an all or nothing like fashion with all the important molecular interactions coming together at the same time.
C1 [Deng, Hua; Callender, Robert] Yeshiva Univ Albert Einstein Coll Med, Dept Biochem, Bronx, NY 10461 USA.
   [Brewer, Scott; Vu, Dung M.; Dyer, R. Brian] Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
   [Clinch, Keith] Ind Res Inc, Lower Hutt, New Zealand.
RP Callender, R (reprint author), Yeshiva Univ Albert Einstein Coll Med, Dept Biochem, 1300 Morris Pk Ave, Bronx, NY 10461 USA.
EM call@aecom.yu.edu; bdyer@lanl.gov
OI Vu, Dung/0000-0002-3707-4439
FU NIBIB NIH HHS [EB01958, R01 EB001958]; NIGMS NIH HHS [5P01GM068036, P01
   GM068036]
NR 23
TC 20
Z9 20
U1 2
U2 8
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 0006-3495
J9 BIOPHYS J
JI Biophys. J.
PD JUL 15
PY 2008
VL 95
IS 2
BP 804
EP 813
DI 10.1529/biophysj.108.128884
PG 10
WC Biophysics
SC Biophysics
GA 318WG
UT WOS:000257122900035
PM 18390601
ER

PT J
AU Read, EL
   Schlau-Cohen, GS
   Engel, GS
   Wen, JZ
   Blankenship, RE
   Fleming, GR
AF Read, Elizabeth L.
   Schlau-Cohen, Gabriela S.
   Engel, Gregory S.
   Wen, Jianzhong
   Blankenship, Robert E.
   Fleming, Graham R.
TI Visualization of excitonic structure in the Fenna-Matthews-Olson
   photosynthetic complex by polarization-dependent two-dimensional
   electronic spectroscopy
SO BIOPHYSICAL JOURNAL
LA English
DT Article
ID FOURIER-TRANSFORM SPECTROSCOPY; FMO-COMPLEX; PROSTHECOCHLORIS-AESTUARII;
   CHLOROBIUM-TEPIDUM; IR-SPECTROSCOPY; BACTERIOCHLOROPHYLL PROTEIN;
   FEMTOSECOND SPECTROSCOPY; ENERGY-TRANSFER; SPECTRA; SIMULATIONS
AB Photosynthetic light-harvesting proceeds by the collection and highly efficient transfer of energy through a network of pigment-protein complexes. Interchromophore electronic couplings and interactions between pigments and the surrounding protein determine energy levels of excitonic states, and dictate the mechanism of energy flow. The excitonic structure (orientation of excitonic transition dipoles) of pigment-protein complexes is generally deduced indirectly from x-ray crystallography, in combination with predictions of transition energies and couplings in the chromophore site basis. We demonstrate that coarsegrained, excitonic, structural information in the form of projection angles between transition dipole moments can be obtained from the polarization-dependent, two-dimensional electronic spectroscopy of an isotropic sample, particularly when the nonrephasing or free polarization decay signal, rather than the photon echo signal, is considered. This method provides an experimental link between atomic and electronic structure, and accesses dynamical information with femtosecond time resolution. In an investigation of the Fenna-Matthews-Olson complex from green sulfur bacteria, the energy transfer connecting two particular exciton states in the protein was isolated as the primary contributor to a crosspeak in the nonrephasing two-dimensional spectrum at 400 femtoseconds under a specific sequence of polarized excitation pulses. The results suggest the possibility of designing experiments using combinations of tailored polarization sequences to separate and monitor individual relaxation pathways.
C1 [Read, Elizabeth L.; Schlau-Cohen, Gabriela S.; Engel, Gregory S.; Fleming, Graham R.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Read, Elizabeth L.; Schlau-Cohen, Gabriela S.; Engel, Gregory S.; Fleming, Graham R.] Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
   [Wen, Jianzhong; Blankenship, Robert E.] Washington Univ, Dept Chem, Dept Biol, St Louis, MO 63130 USA.
RP Fleming, GR (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM grfleming@lbl.gov
RI Wen, Jianzhong/C-1468-2011; Engel, Gregory/C-1108-2012
OI Wen, Jianzhong/0000-0002-3057-721X; Engel, Gregory/0000-0002-6740-5243
NR 38
TC 77
Z9 77
U1 2
U2 21
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 0006-3495
J9 BIOPHYS J
JI Biophys. J.
PD JUL 15
PY 2008
VL 95
IS 2
BP 847
EP 856
DI 10.1529/biophysj.107.128199
PG 10
WC Biophysics
SC Biophysics
GA 318WG
UT WOS:000257122900039
PM 18375502
ER

PT J
AU Epling, WS
   Nova, I
   Peden, CHF
AF Epling, William S.
   Nova, Isabella
   Peden, Charles H. F.
TI Catalytic control of emissions from diesel-powered vehicles - Preface
SO CATALYSIS TODAY
LA English
DT Editorial Material
C1 [Peden, Charles H. F.] Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA.
   [Nova, Isabella] Politecn Milan, Dipartimento Chim Mat & Ingn Chim G Natta, I-20133 Milan, Italy.
   [Epling, William S.] Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada.
RP Peden, CHF (reprint author), Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA.
EM Chuck.Peden@pnl.gov
RI nova, isabella/I-2395-2015
OI nova, isabella/0000-0001-7239-2785
NR 4
TC 1
Z9 1
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5861
J9 CATAL TODAY
JI Catal. Today
PD JUL 15
PY 2008
VL 136
IS 1-2
BP 1
EP 2
DI 10.1016/j.cattod.2008.03.008
PG 2
WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 317JO
UT WOS:000257016300001
ER

PT J
AU Cheng, YS
   Hoard, J
   Lambert, C
   Kwak, JH
   Peden, CHF
AF Cheng, Yisun
   Hoard, John
   Lambert, Christine
   Kwak, Ja Hun
   Peden, Charles H. F.
TI NMR studies of Cu/zeolite SCR catalysts hydrothermally aged with urea
SO CATALYSIS TODAY
LA English
DT Article; Proceedings Paper
CT 20th Meeting of the North-American-Catalysis-Society (NAM)
CY JUN, 2007
CL Houston, TX
SP N Amer Catalysis Soc
DE urea SCR; Cu/zeolite; hydrothermal aging; urea aging; NO(x) reduction
ID REDUCTION; NH3; NO
AB The effects of hydrothermal aging of Cu/zeolite urea-selective catalytic reduction (SCR) catalysts on their reactivity and material properties were assessed by performance tests and multiple characterization techniques that included (27)Al nuclear magnetic resonance (NMR) and X-ray diffraction (XRD). Three aging protocols were used that consisted of varying temperature during hydrothermal aging with or without exposure to aqueous urea solution. Differences in behavior were even found for samples hydrothermally aged immediately following exposure to the urea solution or if the sample was dried overnight before hydrothermal aging. The combination of urea and high-temperature exposure increased the deactivation of Cu/zeolite SCR catalysts beyond that observed by hydrothermal aging alone, with an immediate high-temperature exposure following wetting of the catalyst core with aqueous urea causing the most significant deterioration in performance. The impact of urea on SCR catalyst durability was also found to increase with the aging temperature. NMR analysis suggested that aging with urea resulted in relatively more dealumination of the zeolite for the SCR catalysts in this study. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Cheng, Yisun; Hoard, John; Lambert, Christine] Ford Motor Co, Ford Int Ctr, Dearborn, MI 48124 USA.
   [Kwak, Ja Hun; Peden, Charles H. F.] Pacific NW Natl Lab, Inst Interface Catalysis, Richland, WA 99352 USA.
RP Cheng, YS (reprint author), Ford Motor Co, Ford Int Ctr, Dearborn, MI 48124 USA.
EM ycheng1@ford.com
RI Kwak, Ja Hun/J-4894-2014; 
OI Peden, Charles/0000-0001-6754-9928
NR 8
TC 26
Z9 26
U1 0
U2 12
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5861
J9 CATAL TODAY
JI Catal. Today
PD JUL 15
PY 2008
VL 136
IS 1-2
BP 34
EP 39
DI 10.1016/j.cattod.2008.01.019
PG 6
WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 317JO
UT WOS:000257016300006
ER

PT J
AU Ozensoy, E
   Herling, D
   Szanyi, J
AF Ozensoy, Emrah
   Herling, Darrel
   Szanyi, Janos
TI NOx reduction on a transition metal-free gamma-Al2O3 catalyst using
   dimethylether (DME)
SO CATALYSIS TODAY
LA English
DT Article; Proceedings Paper
CT 20th Meeting of the North-American-Catalysis-Society (NAM)
CY JUN, 2007
CL Houston, TX
SP N Amer Catalysis Soc
DE NOx reduction; SCR; Al2O3; NO2; nitrate; nitrite; formate; methoxy;
   FTIR; TPD; dimethylether (DME); methanol; solid acid catalyst
ID TEMPERATURE-PROGRAMMED DESORPTION; SOLID-ACID CATALYSTS; GAMMA-ALUMINA;
   SURFACE-ACIDITY; ETA-ALUMINA; ETHER DME; FT-IR; SELECTIVE REDUCTION;
   ADSORPTION SITES; METHANOL
AB NO2 and dimethylether (DME) adsorption as well as DME and NO2 co-adsorption on a transition metal-free gamma-alumina catalyst were investigated via in-situ transmission Fourier transform infrared spectroscopy (in-situ FTIR), residual gas analysis (RGA) and temperature programmed desorption (TPD) techniques. NO2 adsorption at room temperature leads to the formation of surface nitrates and nitrites. DME adsorption on the alumina surface at 300 K leads to molecularly adsorbed DME, molecularly adsorbed methanol and surface methoxides. Upon heating the DME-exposed alumina to 500-600 K the surface is dominated by methoxide groups. At higher temperatures methoxide groups are converted into formates. At T > 510 K, formate, decomposition takes place to form H2O(g) and CO(g). DME and NO2 co-adsorption at 423 K does not indicate a significant reaction between DME and NO2. However, in similar experiments at 573 K, fast reaction occurs and the methoxides present at 573 K before the NO2 adsorption are converted into formates, simultaneously with the formation of isocyanates. Under these conditions, NCO can further be hydrolyzed into isocyanic acid or ammonia with the help of water which is generated during the formate formation, decomposition and/or NCO formation steps. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Herling, Darrel; Szanyi, Janos] Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA.
   [Ozensoy, Emrah] Bilkent Univ, Dept Chem, TR-06800 Ankara, Turkey.
   [Ozensoy, Emrah] Bilkent Univ, Inst Mat Sci & Technol, TR-06800 Ankara, Turkey.
RP Szanyi, J (reprint author), Pacific NW Natl Lab, Inst Interfacial Catalysis, POB 999,MSIN K8-80, Richland, WA 99352 USA.
EM janos.szanyi@pnl.gov
NR 48
TC 24
Z9 24
U1 3
U2 10
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5861
J9 CATAL TODAY
JI Catal. Today
PD JUL 15
PY 2008
VL 136
IS 1-2
BP 46
EP 54
DI 10.1016/j.cattod.2007.12.095
PG 9
WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 317JO
UT WOS:000257016300008
ER

PT J
AU Larson, RS
   Pihl, JA
   Chakravarthy, VK
   Toops, TJ
   Daw, CS
AF Larson, Richard S.
   Pihl, Josh A.
   Chakravarthy, V. Kalyana
   Toops, Todd J.
   Daw, C. Stuart
TI Microkinetic modeling of lean NOx trap chemistry under reducing
   conditions
SO CATALYSIS TODAY
LA English
DT Article; Proceedings Paper
CT 20th Meeting of the North-American-Catalysis-Society (NAM)
CY JUN, 2007
CL Houston, TX
SP N Amer Catalysis Soc
DE lean NOx trap (LNT); NOx storage reduction (NSR); regeneration; ammonia
   formation
ID SILICA-SUPPORTED RHODIUM; MONOLITH CATALYSTS; STORAGE/REDUCTION
   CATALYSTS; REDUCTION CATALYST; STORAGE-REDUCTION; MASS-TRANSFER; STORED
   NOX; FT-IR; H-2; PT/BAO/AL2O3
AB An elementary surface reaction mechanism describing the chemistry on the precious metal sites of a lean NOx trap is developed. Kinetic parameters for all of the reactions are found by fitting reactor simulations to an extensive experimental database. Each experiment involves the steady flow of a reactant mixture through a monolith core sample under conditions designed to minimize NOx storage; in each case, the temperature is slowly ramped over a wide range in order to provide a large amount of data. A reaction mechanism involving 28 elementary steps is able to reproduce the results for 21 separate experimental runs quite well. The thermodynamic consistency of the mechanism is assured through the imposition of constraints on a well-defined subset of the rate parameters. It is found that the mechanism can occasionally lead to multiple steadystate behavior due to the existence of parallel reduction pathways. DRIFTS experiments corroborate some of the key mechanistic steps. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Larson, Richard S.] Sandia Natl Labs, Livermore, CA 94551 USA.
   [Pihl, Josh A.; Chakravarthy, V. Kalyana; Toops, Todd J.; Daw, C. Stuart] Engines & Emiss Res Ctr, Oak Ridge Natl Lab, Knoxville, TN 37923 USA.
RP Larson, RS (reprint author), Sandia Natl Labs, POB 969, Livermore, CA 94551 USA.
EM rslarso@sandia.gov
NR 39
TC 25
Z9 25
U1 1
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5861
J9 CATAL TODAY
JI Catal. Today
PD JUL 15
PY 2008
VL 136
IS 1-2
BP 104
EP 120
DI 10.1016/j.cattod.2007.12.117
PG 17
WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 317JO
UT WOS:000257016300014
ER

PT J
AU Verrier, C
   Kwak, JH
   Kim, DH
   Peden, CHF
   Szanyi, J
AF Verrier, Christelle
   Kwak, Ja Hun
   Kim, Do Heui
   Peden, Charles H. F.
   Szanyi, Janos
TI NOx uptake on alkaline earth oxides (BaO, MgO, CaO and SrO) supported on
   gamma-Al2O3
SO CATALYSIS TODAY
LA English
DT Article; Proceedings Paper
CT 20th Meeting of the North-American-Catalysis-Society (NAM)
CY JUN, 2007
CL Houston, TX
SP N Amer Catalysis Soc
DE NOx storage; basicity; BaO/gamma-Al2O3; MgO/gamma-Al2O3;
   SrO/gamma-Al2O3; CaO/gamma-Al2O3; NO2 TPD; FTIR; N-15 s.s. MAS NMR
ID STORAGE-REDUCTION CATALYSTS; INDUCED MORPHOLOGY CHANGES; BAO/AL2O3;
   ADSORPTION; WATER; NITRATE; ENGINES; RELEASE; NITRITE; PHASES
AB NOx uptake experiments were performed on a series of alkaline earth oxide (AEO) (MgO, CaO, SrO, BaO) on gamma-alumina materials. Temperature programmed desorption (TPD) conducted in He flow revealed the presence of two kinds of nitrate species: i.e. bulk and surface nitrates. The ratio of these two types of nitrate species strongly depends on the nature of the alkaline earth oxide. The amount of bulk nitrate species increases with the basicity of the alkaline earth oxide. This conclusion was supported by the results of infrared and N-15 solid-state NMR studies of NO2 adsorption. Due to the low melting point of the precursor used for the preparation of MgO/gamma-Al2O3 material (Mg(NO3)(2)), a significant amount of Mg was lost during sample activation (high temperature annealing) resulting in a material with properties very similar to that of the gamma-Al2O3 support. The effect of water on the NOx species formed in the exposure of the AEO-s to NO2 was also investigated. In agreement with our previous findings for the BaO/gamma-Al2O3 system, an increase of the bulk nitrate species and the simultaneous decrease of the surface nitrate phase were observed for all of these materials. Published by Elsevier B.V.
C1 [Verrier, Christelle; Kwak, Ja Hun; Kim, Do Heui; Peden, Charles H. F.; Szanyi, Janos] Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA.
RP Szanyi, J (reprint author), Pacific NW Natl Lab, Inst Interfacial Catalysis, POB 999,MSIN K8-80, Richland, WA 99352 USA.
EM janos.szanyi@pnl.gov
RI Kwak, Ja Hun/J-4894-2014; Kim, Do Heui/I-3727-2015; 
OI Peden, Charles/0000-0001-6754-9928
NR 26
TC 18
Z9 19
U1 1
U2 20
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5861
J9 CATAL TODAY
JI Catal. Today
PD JUL 15
PY 2008
VL 136
IS 1-2
BP 121
EP 127
DI 10.1016/j.cattod.2007.12.138
PG 7
WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 317JO
UT WOS:000257016300015
ER

PT J
AU Ji, YY
   Choi, JS
   Toops, TJ
   Crocker, M
   Naseri, M
AF Ji, Yaying
   Choi, Jae-Soon
   Toops, Todd J.
   Crocker, Mark
   Naseri, Mojghan
TI Influence of ceria on the NO(x) storage/reduction behavior of lean NO(x)
   trap catalysts
SO CATALYSIS TODAY
LA English
DT Article; Proceedings Paper
CT 20th Meeting of the North-American-Catalysis-Society (NAM)
CY JUN, 2007
CL Houston, TX
SP N Amer Catalysis Soc
DE NO(x); storage; reduction; LNT; ceria
ID STORAGE-REDUCTION CATALYST; WATER-GAS SHIFT; MODEL CATALYSTS;
   OXYGEN-STORAGE; REGENERATION; CEO2; BA; ADSORPTION; STABILITY; EVOLUTION
AB The effect of La(2)O(3)-stabilized ceria incorporation on the functioning of fully formulated lean NO(x) trap catalysts was investigated. Monolithic catalysts were prepared, corresponding to loadings of 0, 50 and 100 g CeO(2)/L, together with a catalyst containing 100 g/L of ceria-zirconia (Ce(0.7)Zr(0.3)O(2)). Loadings of the other main components (Pt, Rh and BaO) were held constant. Catalyst evaluation was performed on a bench flow reactor under simulated diesel exhaust conditions, employing NO(x) storage/reduction cycles. NO(x) storage efficiency in the temperature range 150350 degrees C was observed to increase with ceria loading, resulting in higher NO(x) conversion levels. At 150 degrees C, high rich phase NO(x) slip was observed for all of the catalysts, resulting from an imbalance in the rates of nitrate decomposition and NO, reduction. Optimal NO(x) conversion was obtained in the range 250-350 degrees C for all the catalysts, while at 450 degrees C high rich phase NO(x) slip from the most highly loaded ceria-containing catalyst resulted in lower NO(x) conversion than for the ceria-free formulation. N(2)O was the major NO(x) reduction product at 150 degrees C over all of the catalysts, although low NO(x) conversion levels limited the N(2)O yield. At higher temperatures N(2) was the main product of NO(x) reduction, although NH(3) formation was also observed. Selectivity to NH(3) decreased with increasing ceria loading, indicating that NH(3) is consumed by reaction with stored oxygen in the rear of the catalyst. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Ji, Yaying; Crocker, Mark] Univ Kentucky, Ctr Appl Energy Res, Lexington, KY 40511 USA.
   [Choi, Jae-Soon; Toops, Todd J.] Oak Ridge Natl Lab, Fuels Engines & Emiss Res Ctr, Knoxville, TN 37932 USA.
   [Naseri, Mojghan] DCL Int Inc, Concord, ON L4K 1B2, Canada.
RP Crocker, M (reprint author), Univ Kentucky, Ctr Appl Energy Res, 2540 Res Pk Dr, Lexington, KY 40511 USA.
EM crocker@caer.uky.edu
RI Crocker, Mark/A-2704-2008; 
OI Choi, Jae-Soon/0000-0002-8162-4207
NR 34
TC 46
Z9 46
U1 3
U2 19
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5861
J9 CATAL TODAY
JI Catal. Today
PD JUL 15
PY 2008
VL 136
IS 1-2
BP 146
EP 155
DI 10.1016/j.cattod.2007.11.059
PG 10
WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 317JO
UT WOS:000257016300018
ER

PT J
AU Toops, TJ
   Pihl, JA
AF Toops, Todd J.
   Pihl, Josh A.
TI Sulfation of potassium-based lean NO(x) trap while cycling between lean
   and rich conditions - I. Microreactor study
SO CATALYSIS TODAY
LA English
DT Article; Proceedings Paper
CT 20th Meeting of the North-American-Catalysis-Society (NAM)
CY JUN, 2007
CL Houston, TX
SP N Amer Catalysis Soc
DE lean NO(x) traps; NO(x) storage reduction; sulfur; potassium; NO(x)
   abatement; platinum; alumina
ID STORAGE CATALYSTS; SULFUR DEACTIVATION; REDUCTION CATALYST; FT-IR;
   PT-BA/GAMMA-AL2O3 CATALYST; EXPOSURE CONDITIONS; ADSORBER CATALYSTS;
   3-WAY CATALYST; NO(X) STORAGE; BARIUM OXIDE
AB Exposure of Pt/K/Al(2)O(3) to 15 ppm SO(2) reduces the NO(x) activity at 200, 300, and 400 degrees C at significantly different rates-1.5, 8.5, and 18.0 mu mol NO(x)(h g(cat)), respectively. During the initial sulfation, NO(x) conversion is directly linked to lean phase storage capacity, and sulfation does not impact the reduction kinetics since the amount of unconverted NO(x) was constant or decreased with increasing sulfation time. A portion of sulfur stored at 200 degrees C desorbs upon mild heating to 400 degrees C while cycling between lean and rich conditions. This apparently is a result of sulfur being released from Al(2)O(3); however, performance is not significantly recovered as much of the sulfur is re-adsorbed on the K-phase. This is apparent from analysis of the NO, storage and release profiles. Additional analysis of these profiles suggests that SO(2) initially adsorbs near Pt before interacting with other sites further away from Pt at 300 degrees C. At 400 degrees C, it appears that SO(2) either preferentially adsorbs near Pt and then quickly diffuses along the surface to other less proximal sites, or it directly adsorbs on sites further away from Pt. De-sulfurization up to 800 degrees C using a temperature programmed reduction (TPR) procedure and rich conditions with both CO(2) and H(2)O restored 73-94% of the LNT performance at 300 and 400 degrees C. However, the recovered performance measured at 200 degrees C was only 34-49% of the original NO, reduction activity. H(2)S and SO(2) were the primary de-sulfurization products with H2S having a maximum release between 690 and 755 degrees C, while SO(2) had a peak release between 770 and 785 degrees C. The sulfation temperature does not have a significant impact on the recovered performance, the de-sulfurization products or the sulfur release temperature. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Toops, Todd J.; Pihl, Josh A.] Oak Ridge Natl Lab, Fuels Engines & Emiss Res Ctr, Knoxville, TN 37932 USA.
RP Toops, TJ (reprint author), Oak Ridge Natl Lab, Fuels Engines & Emiss Res Ctr, 2360 Cherahala Blvd, Knoxville, TN 37932 USA.
EM toopstj@ornl.gov
NR 54
TC 10
Z9 10
U1 1
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5861
J9 CATAL TODAY
JI Catal. Today
PD JUL 15
PY 2008
VL 136
IS 1-2
BP 164
EP 172
DI 10.1016/j.cattod.2008.02.007
PG 9
WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 317JO
UT WOS:000257016300020
ER

PT J
AU Choi, JS
   Partridge, WP
   Pihl, JA
   Daw, CS
AF Choi, Jae-Soon
   Partridge, William P.
   Pihl, Josh A.
   Daw, C. Stuart
TI Sulfur and temperature effects on the spatial distribution of reactions
   inside a lean NOx trap and resulting changes in global performance
SO CATALYSIS TODAY
LA English
DT Article; Proceedings Paper
CT 20th Meeting of the North-American-Catalysis-Society (NAM)
CY JUN, 2007
CL Houston, TX
SP N Amer Catalysis Soc
DE lean NOx trap; NOx storage/reduction; oxygen storage capacity;
   sulfation; temperature effect; ammonia; spatial distribution of
   reactions
ID STORAGE-REDUCTION CATALYST; STORAGE/REDUCTION CATALYSTS; FUTURE
   CHALLENGES; REGENERATION; BREAKTHROUGH; PT/K/AL2O3; ADSORPTION;
   HYDROGEN; AMMONIA; RELEASE
AB We experimentally studied the influence of temperature and sulfur loading on the axial distribution of reactions inside a commercial lean NOx trap (LNT) catalyst to better understand the global performance trends. Our measurements were made on a monolith core, bench-flow reactor under cycling conditions (60-s lean/5-s rich) at 200, 325, and 400 degrees C with intra-catalyst and reactor-outlet gas speciation. Postmortem elemental and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) analyses of the catalyst also supplemented our gas species measurements. For the unsulfated catalyst, the NOx storage/reduction (NSR) reactions were localized in the front (upstream) portion of the monolith, whereas oxygen storage/reduction reactions were distributed more evenly along the entire catalyst length. As a result, two axially distinct reaction zones were developed inside the working catalyst: an upstream "NSR zone" where both NO, and oxygen storage/reduction took place and a downstream oxygen storage capacity (OSC)-only zone where the NSR reactions did not penetrate. The NSR zone involved less than half the LNT at 325 and 400 degrees C, but it included almost the entire length at 200 degrees C. Sulfation poisoned both the NSR and OSC reactions beginning at the catalyst upstream edge, with the NSR degradation occurring more rapidly and distinctly than the OSC. As sulfation proceeded, a third zone (the sulfated zone) developed and the NSR zone moved downstream, with a concomitant decrease in both the OSC-only zone and global NO, conversion. The sulfation impact on NO, conversion was greatest at 200 degrees C, when the NSR zone was largest. Ammonia selectivity increased with sulfation, which we attributed to a shortened OSC-only zone and resultantly reduced consumption of NH3, slipping from the NSR zone, by downstream OSC. Lower temperatures also increased NH3 selectivity. Nitrous oxide selectivity also increased with decreasing temperature but showed little dependence on sulfation. We proposed explanations for these trends in NH3 and N2O selectivity based on shifts in competing reaction rates in the three zones. Published by Elsevier B.V.
C1 [Choi, Jae-Soon; Partridge, William P.; Pihl, Josh A.; Daw, C. Stuart] Oak Ridge Natl Lab, Fuels Engines & Emiss Res Ctr, Oak Ridge, TN 37831 USA.
RP Choi, JS (reprint author), Oak Ridge Natl Lab, Fuels Engines & Emiss Res Ctr, POB 2008,MS-6472, Oak Ridge, TN 37831 USA.
EM choijs@ornl.gov
OI Choi, Jae-Soon/0000-0002-8162-4207
NR 38
TC 36
Z9 36
U1 1
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5861
J9 CATAL TODAY
JI Catal. Today
PD JUL 15
PY 2008
VL 136
IS 1-2
BP 173
EP 182
DI 10.1016/j.cattod.2008.01.008
PG 10
WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 317JO
UT WOS:000257016300021
ER

PT J
AU Kim, DH
   Kwak, JH
   Wang, XQ
   Szanyi, J
   Peden, CH
AF Kim, Do Heui
   Kwak, Ja Hun
   Wang, Xianqin
   Szanyi, Janos
   Peden, Charles He
TI Sequential high temperature reduction, low temperature hydrolysis for
   the regeneration of sulfated NOx trap catalysts
SO CATALYSIS TODAY
LA English
DT Article; Proceedings Paper
CT 20th Meeting of the North-American-Catalysis-Society (NAM)
CY JUN, 2007
CL Houston, TX
SP N Amer Catalysis Soc
DE NOx storage; Pt/BaO/Al2O3; desulfation; Pt sintering; H2O effect
ID STORAGE; SO2
AB We describe a new method that minimizes irreversible Pt sintering during the desulfation of sulfated Pt/BaO/Al2O3 lean NOx trap (LNT) catalysts. While it is known that the addition of H2O to H-2 promotes desulfation, we find that the significant and irreversible Pt sintering arising from the presence of water is unavoidable. Control of precious metal sintering is considered to be one of the critical issues in the development of durable LNT catalysts. The new method described here is a sequential desulfation process: the first step is to reduce the sulfates with hydrogen only at higher temperatures to form BaS, followed by a treatment of the thus reduced sample with water at low to moderate temperatures to convert BaS to BaO and H,S. The data showed that Pt sintering was significantly inhibited due to the absence of H2O during the desulfation at high temperatures, and also demonstrates the similar NOx uptake with the desulfated sample cooperatively with H-2 and H2O. This study clearly revealed both positive and negative roles for water in desulfation processes and these factors must be considered when optimizing LNT operation. Published by Elsevier B.V.
C1 [Kim, Do Heui; Kwak, Ja Hun; Wang, Xianqin; Szanyi, Janos; Peden, Charles He] Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99354 USA.
RP Kim, DH (reprint author), Pacific NW Natl Lab, Inst Interfacial Catalysis, 902 Battelle Blvd, Richland, WA 99354 USA.
EM do.kim@pnl.gov
RI Kwak, Ja Hun/J-4894-2014; Kim, Do Heui/I-3727-2015; 
OI Peden, Charles/0000-0001-6754-9928
NR 12
TC 8
Z9 8
U1 0
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5861
J9 CATAL TODAY
JI Catal. Today
PD JUL 15
PY 2008
VL 136
IS 1-2
BP 183
EP 187
DI 10.1016/j.cattod.2007.12.134
PG 5
WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 317JO
UT WOS:000257016300022
ER

PT J
AU Meng, XH
   Wang, P
AF Meng Xin-He
   Wang Peng
TI Matter loops corrected modified gravity in Palatini formulation
SO COMMUNICATIONS IN THEORETICAL PHYSICS
LA English
DT Article
DE modified gravity; accelerated cosmic expansion; loop correction and dark
   energy
ID COSMOLOGICAL CONSTANT; EQUATIONS; UNIVERSALITY; QUINTESSENCE;
   DIMENSIONS; QUANTUM; VACUUM; BRANE
AB Recently, corrections to the standard Einstein-Hilbert action were proposed to explain the current cosmic acceleration in stead of introducing dark energy. In the Palatini formulation of those modified gravity models, there is an important observation due to Arkani-Hamed: matter loops will give rise to a correction to the modified gravity action proportional to the Ricci scalar of the metric. In the presence of such a term, we show that the current forms of modified gravity models in Palatini formulation, specifically, the 1/R gravity and In R gravity, will have phantoms. Then we study the possible instabilities due to the presence of phantom fields. We show that the strong instability in the metric formulation of 1/R gravity indicated by Dolgov and Kawasaki will not appear and the decay timescales for the phantom fields may be long enough for the theories to make sense as effective field theory. On the other hand, if we change the sign of the modification terms to eliminate the phantoms, some other inconsistencies will arise for the various versions of the modified gravity models. Finally, we comment on the universal property of the Palatini formulation of the matter loops corrected modified gravity models and its implications.
C1 [Meng Xin-He] Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China.
   [Wang Peng] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
   [Wang Peng] Stanford Univ, SLAC, Stanford, CA 94305 USA.
   [Meng Xin-He] Hanyang Univ, Dept Phys, Div Adv Res & Educ Phys BK21, Seoul 133791, South Korea.
RP Meng, XH (reprint author), Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China.
EM xhmeng@hanyang.ac.kr; pewang@eyou.com
NR 49
TC 2
Z9 2
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0253-6102
EI 1572-9494
J9 COMMUN THEOR PHYS
JI Commun. Theor. Phys.
PD JUL 15
PY 2008
VL 50
IS 1
BP 275
EP 278
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 333AQ
UT WOS:000258124800053
ER

PT J
AU Hoch, RV
   Visel, A
   Pennacchio, LA
   Rubenstein, JLR
AF Hoch, Renee V.
   Visel, Axel
   Pennacchio, Len A.
   Rubenstein, John L. R.
TI Identification and characterization of novel Fgf17 enhancers active in
   the rostral forebrain signaling center
SO DEVELOPMENTAL BIOLOGY
LA English
DT Meeting Abstract
CT 67th Annual Meeting of the Society-for-Developmental-Biology
CY JUL 25-30, 2008
CL Univ Penn, Philadelphia, PA
SP Soc Dev Biol
HO Univ Penn
C1 [Hoch, Renee V.; Rubenstein, John L. R.] UCSF, Dept Psychiat, San Francisco, CA USA.
   [Visel, Axel; Pennacchio, Len A.] Lawrence Berkeley Natl Lab, Berkeley, CA USA.
RI Visel, Axel/A-9398-2009
OI Visel, Axel/0000-0002-4130-7784
NR 0
TC 0
Z9 0
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 0012-1606
J9 DEV BIOL
JI Dev. Biol.
PD JUL 15
PY 2008
VL 319
IS 2
MA 354
BP 573
EP 574
DI 10.1016/j.ydbio.2008.05.377
PG 2
WC Developmental Biology
SC Developmental Biology
GA 327NA
UT WOS:000257734600375
ER

PT J
AU Rapp, RP
   Irifune, T
   Shimizu, N
   Nishiyama, N
   Norman, MD
   Inoue, J
AF Rapp, Robert P.
   Irifune, Tetsuo
   Shimizu, Nobu
   Nishiyama, Norimasa
   Norman, Marc D.
   Inoue, Toru
TI Subduction recycling of continental sediments and the origin of
   geochemically enriched reservoirs in the deep mantle
SO EARTH AND PLANETARY SCIENCE LETTERS
LA English
DT Article
DE subduction zones; ocean island basalts (OIB); K-hollandite; continental
   sediments; mantle transition zone; lamproite
ID OXYGEN-ISOTOPE EVIDENCE; PITCAIRN-ISLAND LAVAS; EQUATION-OF-STATE;
   HIGH-PRESSURE; TRACE-ELEMENT; KALSI3O8 HOLLANDITE; TRANSITION ZONE;
   EARTHS MANTLE; EXPERIMENTAL CONSTRAINTS; WATER TRANSPORT
AB Isotopic and trace element geochemical studies of ocean island basalts (OIBs) have for many years been used to infer the presence of long-lived (similar to 1-2 Ga old) compositional heterogeneities in the deep mantle related to recycling of crustal lithologies and marine and terrigenous sediments via subduction [e.g., Zindler, A., Hart, S.R., 1986. Chemical geodynamics. Annu. Rev. Earth Planet. Sci. 14, 493-571; Weaver, B.L., 1991. The origin of ocean island basalt end-member compositions: trace element and isotopic constraints. Earth Planet. Sci. Lett. 104, 381-397; Chauvel, C., Hofmann, A.W., Vidal, R, 1992. HIMU-EM: the French Polynesian connection. Earth Planet. Sci. Lett. 110, 99-119; Hofmann, A.W., 1997. Mantle geochemistry: the message from oceanic volcanism. Nature 385, 219-229; Willbold, M., Stracke, A., 2006. Trace element composition of mantle end-members: Implications for recycling of oceanic and upper and lower continental crust. Geochem. Geophys. Geosyst. Q04004. 7, doi:10.1029/2005GC001005]. In particular, models for the EM-1 type ("enriched mantle") OIB reservoir have invoked the presence of subducted, continental-derived sediment to explain high Sr-87/Sr-86 ratios, low Nd-143/Nd-144 and Pb-206/Pb-204 ratios, and extreme enrichments in incompatible elements observed in OIB lavas from, for example, the Pitcairn Island group in the South Pacific [Woodhead, J.D., McCulloch, M.T., 1989; Woodhead, J.D., Devey, C.W., 1993. Geochemistry of the Pitcairn seamounts, I: source character and temporal trends. Earth Planet. Sci. Lett. 116, 81-99; Eisele, J., Sharma, M., Galer, S.J.G., Blichert-Toft, J., Devey, C. W., Hofmann, A.W., 2002. The role of sediment recycling in EM-1 inferred from Os, Pb, Hf, Nd, Sr isotope and trace element systematics of the Pitcairn hotspot. Earth Planet. Sci. Lett. 196, 197-212]. More recently, ultrapotassic, mantle-derived lavas (lamproites) from Gaussberg, Antarctica have been interpreted as the product of melting of deeply recycled (subducted) Archean-age metasediments in the mantle transition zone [Murphy, D.T., Collerson, K.D., Kamber, B.S., 2002. Lamproites from Gaussberg, Antartica: possible transition zone melts of Archaean subducted sediments. J. Petrol. 43, 981-1001]. Here we report the results of phase equilibria experiments on two different natural sedimentary compositions (a high-grade metapelite with <1 wt.% H2O, and a marine "mud" with similar to 8 wt.% H2O) at 16-23 GPa. In both materials, the high-pressure mineral assemblages contain similar to 15-30 wt.% K-hollandite (KAISi(3)O(8)), in addition to stishovite, garnet, an Al-silicate phase (kyanite or phase egg), and a Fe-Ti spinel (corundum). Ion microprobe analyses of K-hollandite for a range of trace elements reveal that this phase controls a significant proportion of the whole-rock budget of incompatible, large-ion lithophile elements (LILEs, e.g., Rb, Ba, Sr, K, Pb, La, Ce and Th). Comparisons between the abundances and ratios of these elements in K-hollandite with those in EM-1 type ocean-island basalts from Pitcairn Island and related seamounts, and with the Gaussberg lamproites, indicate the presence of deeply recycled, continent-derived sediments in these lavas' sources. Our results suggest that the incompatible trace-element signature of EM-1 OIB reservoirs in general and of the Gaussberg lamproites in particular can be attributed to recycling of K-hollandite-bearing continental sediments to transition zone depths. (C) 2008 Elsevier B.V.
   All righs reserved.
C1 [Norman, Marc D.] Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 0200, Australia.
   [Rapp, Robert P.; Irifune, Tetsuo; Inoue, Toru] Ehime Univ, Geodynam Res Ctr, Matsuyama, Ehime 7908577, Japan.
   [Shimizu, Nobu] Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA.
   [Nishiyama, Norimasa] Univ Chicago, Argonne Natl Lab, Consortium Adv Radiat Sources GSECARS, Argonne, IL 60439 USA.
RP Rapp, RP (reprint author), Australian Natl Univ, Res Sch Earth Sci, GPO Box 4, Canberra, ACT 0200, Australia.
EM robert.rapp@anu.edu.au
RI Norman, Marc/A-2244-2008; Facility, NENIMF/B-8811-2015; Nishiyama,
   Norimasa/A-7627-2016
NR 56
TC 73
Z9 76
U1 9
U2 67
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0012-821X
J9 EARTH PLANET SC LETT
JI Earth Planet. Sci. Lett.
PD JUL 15
PY 2008
VL 271
IS 1-4
BP 14
EP 23
DI 10.1016/j.epsl.2008.02.028
PG 10
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 328ZB
UT WOS:000257835600002
ER

PT J
AU Torres, ME
   Trehu, AM
   Cespedes, N
   Kastner, M
   Wortmann, UG
   Kim, JH
   Long, P
   Malinverno, A
   Pohlman, JW
   Riedel, M
   Collett, T
AF Torres, M. E.
   Trehu, A. M.
   Cespedes, N.
   Kastner, M.
   Wortmann, U. G.
   Kim, J. -H.
   Long, P.
   Malinverno, A.
   Pohlman, J. W.
   Riedel, M.
   Collett, T.
TI Methane hydrate formation in turbidite sediments of northern Cascadia,
   IODP Expedition 311
SO EARTH AND PLANETARY SCIENCE LETTERS
LA English
DT Article
DE methane hydrate; Cascadia margin; grain size; infrared scans
ID GAS-HYDRATE; MARINE-SEDIMENTS; POROUS-MEDIA; RIDGE; DISSOCIATION;
   CONSTRAINTS; SUBSURFACE; ENRICHMENT; OREGON; RATES
AB Expedition 311 of the Integrated Ocean Drilling Program (IODP) to northern Cascadia recovered gas-hydrate bearing sediments along a SW-NE transect from the first ridge of the accretionary margin to the eastward limit of gas-hydrate stability. In this study we contrast the gas gas-hydrate distribution from two sites drilled similar to 8 km apart in different tectonic settings. At Site U1325, drilled on a depositional basin with nearly horizontal sedimentary sequences, the gas-hydrate distribution shows a trend of increasing saturation toward the base of gas-hydrate stability, consistent with several model simulations in the literature. Site U1326 was drilled on an uplifted ridge characterized by faulting, which has likely experienced some mass wasting events. Here the gas hydrate does not show a clear depth-distribution trend, the highest gas-hydrate saturation occurs well within the gas-hydrate stability zone at the shallow depth of similar to 49 mbsf. Sediments at both sites are characterized by abundant coarse-grained (sand) layers up to 23 cm in thickness, and are interspaced within fine-grained (clay and silty clay) detrital sediments. The gas-hydrate distribution is punctuated by localized depth intervals of high gas-hydrate saturation, which preferentially occur in the coarse-grained horizons and occupy up to 60% of the pore space at Site U1325 and >80% at Site U1326. Detailed analyses of contiguous samples of different lithologies show that when enough methane is present, about 90% of the variance in gas-hydrate saturation can be explained by the sand (>63 mu m) content of the sediments. The variability in gas-hydrate occupancy of sandy horizons at Site U1326 reflects an insufficient methane supply to the sediment section between 190 and 245 mbsf. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Torres, M. E.; Trehu, A. M.; Cespedes, N.] Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA.
   [Kastner, M.] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
   [Wortmann, U. G.] Univ Toronto, Dept Geol, Toronto, ON M5S 3B1, Canada.
   [Kim, J. -H.] KIGAM, Petr & Marine Resources Res Div, Taejon 305350, South Korea.
   [Long, P.] Pacific NW Natl Lab, Richland, WA 99352 USA.
   [Malinverno, A.] Columbia Univ, Lamont Doherty Geol Observ, Palisades, NY 10964 USA.
   [Pohlman, J. W.] US Geol Survey, Woods Hole Sci Ctr, Woods Hole, MA 02543 USA.
   [Riedel, M.] McGill Univ, Dept Earth & Planetary Sci, Montreal, PQ H3A 2A7, Canada.
   [Collett, T.] US Geol Survey, Denver Fed Ctr, Denver, CO 80225 USA.
RP Torres, ME (reprint author), Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA.
EM mtorres@coas.oregonstate.edu
OI Wortmann, Ulrich/0000-0001-7854-9173; Kim, Ji-Hoon/0000-0003-2430-3869
NR 37
TC 68
Z9 70
U1 3
U2 32
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0012-821X
EI 1385-013X
J9 EARTH PLANET SC LETT
JI Earth Planet. Sci. Lett.
PD JUL 15
PY 2008
VL 271
IS 1-4
BP 170
EP 180
DI 10.1016/j.epsl.2008.03.061
PG 11
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 328ZB
UT WOS:000257835600016
ER

PT J
AU Miot, J
   Morin, G
   Skouri-Panet, F
   Ferard, C
   Aubry, E
   Briand, J
   Wang, Y
   Ona-Nguema, G
   Guyot, F
   Brown, GE
AF Miot, Jennyfer
   Morin, Guillaume
   Skouri-Panet, Feriel
   Ferard, Celine
   Aubry, Emmanuel
   Briand, Joel
   Wang, Yuheng
   Ona-Nguema, Georges
   Guyot, Francois
   Brown, Gordon E.
TI XAS study of arsenic coordination in Euglena gracilis exposed to
   arsenite
SO ENVIRONMENTAL SCIENCE & TECHNOLOGY
LA English
DT Article
ID HEAVY-METAL DETOXIFICATION; NEAR-EDGE STRUCTURE; ACID-MINE DRAINAGE;
   SACCHAROMYCES-CEREVISIAE; PTERIS-VITTATA; CADMIUM; RESISTANCE; TOXICITY;
   PROTEIN; CELLS
AB Among the few eukaryotes adapted to the extreme conditions prevailing in acid mine drainage, Euglenae are ubiquitous in these metal(loid)-impacted environments, where they can be exposed to As(III) concentrations up to a few hundreds of mg .L(-1). In order to evaluate their resistance to this toxic metalloid and to identify associated detoxification mechanisms, we investigated arsenic coordination in the model photosynthetic protozoan, Euglena, gracilis, cultured at pH 3.2 and exposed to As(III) at concentrations ranging from 10 to 500 mg.L(-1). E gracilis is shown to tolerate As(III) concentrations up to 200 mg.L(-1), without accumulating this metalloid. X-ray absorption spectroscopy at the As K-edge shows that, in the cells, arsenic mainly binds to sulfur ligands, likely in the form of arsenic-tris-glutathione (As-(GS)(3)) or arsenic-phytochelatin (As-PC) complexes, and to a much lesser extent, to carbon ligands, presumably in the form of methylated As(III)-compounds. The key role of the glutathione pathway in As(III) detoxification is confirmed by the lower growth rate of E. gracilis cultures exposed to arsenic, in the presence of buthionine sulfoximine, an inhibitor of glutathione synthesis. This study provides the first investigation at the molecular scale of intracellular arsenic speciation in E. gracilis and thus contributes to the understanding of arsenic detoxification mechanisms in a eukaryotic microorganism under extreme acid mine drainage conditions.
C1 [Miot, Jennyfer; Morin, Guillaume; Skouri-Panet, Feriel; Ferard, Celine; Wang, Yuheng; Ona-Nguema, Georges; Guyot, Francois] Univ Paris 06, CNRS, UMR 7590, IMPMC, F-75015 Paris, France.
   [Miot, Jennyfer; Morin, Guillaume; Skouri-Panet, Feriel; Ferard, Celine; Wang, Yuheng; Ona-Nguema, Georges; Guyot, Francois] Univ Paris 07, F-75015 Paris, France.
   [Miot, Jennyfer; Morin, Guillaume; Skouri-Panet, Feriel; Ferard, Celine; Wang, Yuheng; Ona-Nguema, Georges; Guyot, Francois] IPGP, F-75015 Paris, France.
   [Aubry, Emmanuel] Univ Paris 06, UMR 7618, Bioemco, INRA,INAPG,CNRS,ENS,ENSCP, F-75252 Paris 05, France.
   [Briand, Joel] Univ Paris 07, EA 3514, Lab Electrophysiol Membranes, F-75252 Paris 05, France.
   [Brown, Gordon E.] Stanford Univ, Dept Geol & Environm Sci, Surface & Aqueous Geochem Grp, Stanford, CA 94305 USA.
   [Brown, Gordon E.] SLAC, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
RP Miot, J (reprint author), Univ Paris 06, CNRS, UMR 7590, IMPMC, 140 Rue Lourmel, F-75015 Paris, France.
EM miot@impmc.jussieu.fr
RI Wang, Yuheng/K-3988-2012; GUYOT, Francois/C-3824-2016; IMPMC,
   Geobio/F-8819-2016
OI Wang, Yuheng/0000-0002-1786-5970; GUYOT, Francois/0000-0003-4622-2218; 
NR 44
TC 17
Z9 17
U1 4
U2 25
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0013-936X
J9 ENVIRON SCI TECHNOL
JI Environ. Sci. Technol.
PD JUL 15
PY 2008
VL 42
IS 14
BP 5342
EP 5347
DI 10.1021/es703072d
PG 6
WC Engineering, Environmental; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA 325WS
UT WOS:000257620000053
PM 18754391
ER

PT J
AU Houston, JR
   Herberg, JL
   Maxwell, RS
   Carroll, SA
AF Houston, J. R.
   Herberg, J. L.
   Maxwell, R. S.
   Carroll, S. A.
TI Association of dissolved aluminum with silica: Connecting molecular
   structure to surface reactivity using NMR
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID NUCLEAR-MAGNETIC-RESONANCE; CROSS-POLARIZATION; BIOGENIC SILICA; CATION
   ADSORPTION; AMORPHOUS SILICA; SPECTROSCOPY; SORPTION; AL-27; WATER;
   DISSOLUTION
AB We studied uptake mechanisms for dissolved Al on amorphous silica by combining bulk-solution chemistry experiments with solid-state Nuclear Magnetic Resonance techniques (Al-27 magic-angle spinning (MAS) NMR, Al-27{H-1} cross-polarization (CP) MAS NMR and 29Si{H-1} CP-MAS NMR). We find that reaction of Al (1 mM) with amorphous silica consists of at least three reaction pathways; (1) adsorption of Al to surface silanol sites, (2) surface-enhanced precipitation of an aluminum hydroxide, and (3) bulk precipitation of an aluminosilicate phase. From the NMR speciation and water chemistry data, we calculate that 0.20 (+/- 0.04) tetrahedral Al atoms nm(-2) sorb to the silica surface. Once the surface has sorbed roughly half of the total dissolved Al (similar to 8% site coverage), aluminum hydroxides and aluminosilicates precipitate from solution. These precipitation reactions are dependent upon solution pH and total dissolved silica concentration. We find that the Si:Al stoichiometry of the aluminosilicate precipitate is roughly 1:1 and suggest a chemical formula of NaAlSiO4 in which Na+ acts as the charge compensating cation. For the adsorption of Al, we propose a surface-controlled reaction mechanism where Al sorbs as an inner-sphere coordination complex at the silica surface. Analogous to the hydrolysis of Al(OH2)(6)(3+), we suggest that rapid deprotonation by surface hydroxyls followed by dehydration of ligated waters results in four-coordinate (> SiOH)(2)Al(OH)(2) sites at the surface of amorphous silica. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Houston, J. R.; Herberg, J. L.; Maxwell, R. S.; Carroll, S. A.] Lawrence Livermore Natl Lab, Chem Mat Earth & Life Sci Directorate, Livermore, CA 94550 USA.
RP Houston, JR (reprint author), Lawrence Livermore Natl Lab, Chem Mat Earth & Life Sci Directorate, 7000 E Ave, Livermore, CA 94550 USA.
EM houston23@llnl.gov; herberg1@llnl.gov; maxwell7@llnl.gov;
   carroll6@llnl.gov
NR 40
TC 24
Z9 25
U1 5
U2 24
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0016-7037
EI 1872-9533
J9 GEOCHIM COSMOCHIM AC
JI Geochim. Cosmochim. Acta
PD JUL 15
PY 2008
VL 72
IS 14
BP 3326
EP 3337
DI 10.1016/j.gca.2008.04.028
PG 12
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 326ZC
UT WOS:000257697300003
ER

PT J
AU Boily, JF
   Felmy, AR
AF Boily, Jean-Francois
   Felmy, Andrew R.
TI On the protonation of oxo- and hydroxo-groups of the goethite
   (alpha-FeOOH) surface: A FTIR spectroscopic investigation of surface O-H
   stretching vibrations
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID FREQUENCY GENERATION SPECTROSCOPY; MOLECULAR STATICS CALCULATIONS;
   SYNTHETIC GOETHITE; INFRARED-SPECTROSCOPY; PHOSPHATED GOETHITE; METAL
   (HYDR)OXIDES; CATALYTIC ALUMINAS; AQUEOUS-SOLUTIONS; FORCE MICROSCOPY;
   IR SPECTROSCOPY
AB The O-H stretching region of goethite particles evaporated at different levels of acidity was investigated by Attenuated Total Reflectance (ATR)-Fourier Transform InfraRed (FTIR) spectroscopy. Two-dimensional IR Correlation Spectroscopy was used to identify correlations between different sets of discrete surface OH stretches and a Multivariate Curve Resolution analysis was used to resolve the predominant spectral components. Two dominant groups of hydroxyls were identified on the basis of their differences in proton affinity. Group I hydroxyls appear as two 3698/3541 and 3660/3490 cm(-1) band pairs. Group II hydroxyls are manifested through the 3648 and 3578 cm(-1) bands at greater levels of surface proton loading. There is consequently no correlation between O-H stretching frequencies and proton affinity. Groups I and II were assigned to mostly singly- (-OH) and doubly- (mu-OH) coordinated hydroxyls, respectively. Stretches arising from triply-coordinated (mu 3-OH) are proposed to be embedded within the dominant O-H band of bulk goethite. The possibility that these sites contribute to Group I and II hydroxyls should, however, not be entirely dismissed without further investigations.
   A reexamination of Temperature Programmed Desorption (TPD)-FTIR data of one goethite sample evaporated from alkaline conditions [Boily J.-F., Szanyi J., Felmy A. R. (2006) A combined FTIR and TPD study on the bulk and surface dehydroxylation and decarbonation of synthetic goethite. Geochim. Cosmochim. Acta 70, 3613-3624] provided further constraints to this band assignment by providing clues to the network of surface hydrogen bonds. Important cooperative effects between hydrogen-bonded surface hydroxyls are suggested to play a crucial role on the variations of the position and intensity of discrete O-H stretching bands as a function of protonation level and temperature. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Boily, Jean-Francois; Felmy, Andrew R.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Boily, JF (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA.
EM boily@pnl.gov
NR 69
TC 35
Z9 36
U1 4
U2 38
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0016-7037
J9 GEOCHIM COSMOCHIM AC
JI Geochim. Cosmochim. Acta
PD JUL 15
PY 2008
VL 72
IS 14
BP 3338
EP 3357
DI 10.1016/j.gca.2008.04.022
PG 20
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 326ZC
UT WOS:000257697300004
ER

PT J
AU Duckworth, OW
   Bargar, JR
   Sposito, G
AF Duckworth, Owen W.
   Bargar, John R.
   Sposito, Garrison
TI Sorption of ferric iron from ferrioxamine B to synthetic and biogenic
   layer type manganese oxides
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID SIDEROPHORE DESFERRIOXAMINE-B; METAL-EDTA COMPLEXES; RAY-ABSORPTION
   SPECTROSCOPY; FINE-STRUCTURE SPECTROSCOPY; EQUATORIAL PACIFIC-OCEAN;
   REDUCTIVE DISSOLUTION; SIDEROPHORE-MANGANESE(III) INTERACTIONS;
   ADSORPTION COMPLEXES; ORGANIC COMPLEXATION; STABILITY-CONSTANTS
AB Siderophores are biogenic chelating agents produced in terrestrial and marine environments that increase the bioavailability of ferric iron. Recent work has suggested that both aqueous and solid-phase Mn(III) may affect siderophore-mediated iron transport, but scant information appears to be available about the potential roles of layer type manganese oxides, which are relatively abundant in soils and the oligotrophic marine water column. To probe the effects of layer type manganese oxides on the stability of aqueous Fe-siderophore complexes, we studied the sorption of ferrioxamine B [Fe(III)HDFOB(+), an Fe(III) chelate of the trihydroxamate siderophore desferrioxamine B (DFOB)] to two synthetic birnessites [layer type Mn(III,IV) oxides] and a biogenic birnessite produced by Pseudomonas putida GB-1. We found that all of these predominantly Mn(IV) oxides greatly reduced the aqueous concentration of Fe(III)HDFOB(+) at pH 8. Analysis of Fe K-edge EXAFS spectra indicated that a dominant fraction of Fe(Ill) associated with the Mn(IV) oxides is not complexed by DFOB as in solution, but instead Fe(111) is specifically adsorbed to the mineral structure at multiple sites, thus indicating that the Mn(IV) oxides displaced Fe(Ill) from the siderophore complex. These results indicate that layer type manganese oxides, including biogenic minerals, may sequester iron from soluble ferric complexes. We conclude that the sorption of iron-siderophore complexes may play a significant role in the bioavailability and biogeochemical cycling of iron in marine and terrestrial environments. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Duckworth, Owen W.] N Carolina State Univ, Dept Soil Sci, Raleigh, NC 27695 USA.
   [Bargar, John R.] Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
   [Sposito, Garrison] Univ Calif Berkeley, Div Ecosyst Sci, Berkeley, CA 94720 USA.
RP Duckworth, OW (reprint author), N Carolina State Univ, Dept Soil Sci, Raleigh, NC 27695 USA.
EM owen_duckworth@ncsu.edu
RI Grandjean, Agnes/H-3115-2011
NR 89
TC 28
Z9 29
U1 2
U2 21
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0016-7037
J9 GEOCHIM COSMOCHIM AC
JI Geochim. Cosmochim. Acta
PD JUL 15
PY 2008
VL 72
IS 14
BP 3371
EP 3380
DI 10.1016/j.gca.2008.04.026
PG 10
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 326ZC
UT WOS:000257697300006
ER

PT J
AU Watson, HC
   Watson, EB
   Fei, YW
AF Watson, Heather C.
   Watson, E. Bruce
   Fei, Yingwei
TI Diffusion of Au, Pd, Re, and P in FeNi alloys at high pressure
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID CORE-MANTLE INTERACTION; SOLUTE IMPURITY DIFFUSION; PLATINUM-GROUP
   ELEMENTS; IVA IRON-METEORITES; MG TRACER DIFFUSION; EARTHS INNER-CORE;
   NI-P; COOLING RATES; STONY-IRON; 1 ATM
AB Multi-anvil and piston cylinder experiments were performed to determine the effect of both pressure and temperature on the diffusivities of several siderophile elements in a Fe90Ni10 core-analog alloy. Activation energies were calculated to be between 244 and 257 kJ/mol for Re, Pd, and Au at 10 GPa, and 264 kJ/mol for P at I GPa. It was found that pressure has a marked negative effect on the diffusivities of Au, Re, and Pd, and activation volumes for these elements were calculated to be between 3 and 6 cm (3)/mol at 10 GPa. The effect of both temperature and pressure on P diffusion is noticeably less, and the absolute diffusivity of phosphorus is consistently higher than that of the other elements. It is inferred that the reason for this difference is because P is diffusing via an interstitial mechanism as opposed to Re, Pd, and Au which occupy regular lattice sites in the crystal. The effect of pressure and temperature together with depth in the Earth suggests that these elements may continue to exhibit different behavior at more extreme conditions. The significance of these new results lies in the ability to place constraints on many time-dependent processes that pertain to the formation and evolution of planetary cores, as well as the formation and cooling histories of other metal-rich bodies in the solar system, such as meteorites. (c) 2008 Elsevier Ltd. All rights reserved.
C1 [Watson, Heather C.; Watson, E. Bruce] Rensselaer Polytech Inst, Troy, NY 12180 USA.
   [Watson, Heather C.; Fei, Yingwei] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA.
RP Watson, HC (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave,L-206, Livermore, CA 94550 USA.
EM watson40@llnl.gov
RI Fei, Yingwei/F-3709-2011; 
OI Fei, Yingwei/0000-0001-9955-5353; Watson, Heather/0000-0003-4307-6518
NR 67
TC 3
Z9 3
U1 2
U2 14
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0016-7037
J9 GEOCHIM COSMOCHIM AC
JI Geochim. Cosmochim. Acta
PD JUL 15
PY 2008
VL 72
IS 14
BP 3550
EP 3561
DI 10.1016/j.gca.2008.04.034
PG 12
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 326ZC
UT WOS:000257697300019
ER

PT J
AU Fu, LF
   Okamoto, NL
   Chi, MF
   Browning, ND
   Jung, HS
   Grein, CH
AF Fu, L. F.
   Okamoto, N. L.
   Chi, M. F.
   Browning, N. D.
   Jung, H. S.
   Grein, C. H.
TI Frank dislocation loops in HgTe/CdTe superlattices on CdTe/Si(211)B
   substrates
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID MOLECULAR-BEAM EPITAXY; HGCDTE PHOTOVOLTAIC DETECTORS; WAVELENGTH
   INFRARED DETECTORS; STRUCTURAL-PROPERTIES; ELECTRON-MICROSCOPY;
   OPTICAL-PROPERTIES; CDTE; INTERDIFFUSION; HG1-XCDXTE; EPILAYERS
AB The defect structures in HgTe/CdTe superlattices (SLs) on CdTe/Si(211)B substrates grown by molecular-beam epitaxy have been investigated using (scanning) transmission electron microscopy and electron energy loss spectroscopy. Straight Hg-rich defects perpendicular to the SLs have been observed near the substrate while Frank dislocation loops (FDLs) are seen far from the substrate. The Hg-rich defects exhibit only a compositional variation with no significant atomic shift, and can be considered to be a remnant of a FDL which has climbed by thermal diffusion during the growth. (C) 2008 American Institute of Physics.
C1 [Fu, L. F.; Okamoto, N. L.; Chi, M. F.; Browning, N. D.] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
   [Jung, H. S.; Grein, C. H.] EPIR Technol Inc, Bolingbrook, IL 60440 USA.
   [Browning, N. D.] Lawrence Livermore Natl Lab, Chem Mat Earth & Life Sci Directorate, Div Mat Sci & Technol, Livermore, CA 94550 USA.
RP Fu, LF (reprint author), Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
EM lianfeng.fu@fei.com; nbrowning@ucdavis.edu
RI Okamoto, Norihiko/A-7345-2010; Chi, Miaofang/Q-2489-2015; 
OI Okamoto, Norihiko/0000-0003-0199-7271; Chi,
   Miaofang/0000-0003-0764-1567; Browning, Nigel/0000-0003-0491-251X
NR 27
TC 1
Z9 1
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUL 15
PY 2008
VL 104
IS 2
AR 023104
DI 10.1063/1.2956687
PG 5
WC Physics, Applied
SC Physics
GA 333TH
UT WOS:000258174800004
ER

PT J
AU Harris, JR
   Blackfield, D
   Caporaso, GJ
   Chen, YJ
   Hawkins, S
   Kendig, M
   Poole, B
   Sanders, DM
   Krogh, M
   Managan, JE
AF Harris, J. R.
   Blackfield, D.
   Caporaso, G. J.
   Chen, Y. -J.
   Hawkins, S.
   Kendig, M.
   Poole, B.
   Sanders, D. M.
   Krogh, M.
   Managan, J. E.
TI Vacuum insulator development for the dielectric wall accelerator
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID SURFACE FLASHOVER
AB At Lawrence Livermore National Laboratory, we are developing a new type of accelerator, known as a dielectric wall accelerator, in which compact pulse-forming lines directly apply an accelerating field to the beam through an insulating vacuum boundary. The electrical strength of this insulator may define the maximum gradient achievable in these machines. To increase the system gradient, we use "high-gradient insulators" composed of alternating layers of dielectric and metal for the vacuum insulator. In this paper, we present our recent results from experiment and simulation, including successful testing of a high-gradient insulator in a functioning dielectric wall accelerator cell. Our results indicate that proper high-voltage conditioning of the insulators can delay the onset of flashover, that the observed conditioning consists of both a permanent and a temporary part, and that the insulators' voltage-holding capability increases with increasing dielectric layer thickness. (C) 2008 American Institute of Physics.
C1 [Harris, J. R.; Blackfield, D.; Caporaso, G. J.; Chen, Y. -J.; Hawkins, S.; Kendig, M.; Poole, B.; Sanders, D. M.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
   [Krogh, M.] Complete Compact Aero Operation Syst Inc, Lees Summit, MO 64081 USA.
   [Managan, J. E.] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
RP Harris, JR (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM harris89@llnl.gov
NR 29
TC 8
Z9 11
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUL 15
PY 2008
VL 104
IS 2
AR 023301
DI 10.1063/1.2956702
PG 7
WC Physics, Applied
SC Physics
GA 333TH
UT WOS:000258174800011
ER

PT J
AU Hsu, L
   Walukiewicz, W
AF Hsu, L.
   Walukiewicz, W.
TI Modeling of InGaN/Si tandem solar cells
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID SILICON
AB We investigate theoretically the characteristics of monolithic InGaN/Si two-junction series-connected solar cells using the air mass 1.5 global irradiance spectrum. The addition of an InGaN junction is found to produce significant increases in the energy conversion efficiency of the solar cell over that of one-junction Si cells. Even when Si is not of high quality, such two-junction cells could achieve efficiencies high enough to be practically feasible. We also show that further, though smaller, improvements of the efficiency can be achieved by adding another junction to form an InGaN/InGaN/Si three-junction cell. (c) 2008 American Institute of Physics.
C1 [Hsu, L.] Univ Minnesota, Dept Postsecondary Teaching & Learning, Minneapolis, MN 55414 USA.
   [Walukiewicz, W.] Lawrence Berkeley Natl Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USA.
RP Hsu, L (reprint author), Univ Minnesota, Dept Postsecondary Teaching & Learning, Minneapolis, MN 55414 USA.
EM w_walukiewicz@lbl.gov
NR 12
TC 87
Z9 88
U1 1
U2 30
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 JUL 15
PY 2008
VL 104
IS 2
AR 024507
DI 10.1063/1.2952031
PG 7
WC Physics, Applied
SC Physics
GA 333TH
UT WOS:000258174800121
ER

PT J
AU Huang, QJ
   Lilley, CM
   Bode, M
   Divan, R
AF Huang, Qiaojian
   Lilley, Carmen M.
   Bode, Matthias
   Divan, Ralu
TI Surface and size effects on the electrical properties of Cu nanowires
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID TEMPERATURE-COEFFICIENT; THIN-FILMS; RESISTANCE; CONDUCTIVITY
AB Copper nanowires were patterned with e-beam lithography and fabricated with a copper film deposited by e-beam evaporation. Various electrical properties of these nanowires (including resistivity, temperature coefficient of resistance, and failure current density) were characterized. It was experimentally found that surface and size have apparent effects on the electrical properties. Smaller values for the temperature coefficient of resistance and higher failure current density were found for Cu nanowires with decreasing wire width. The experimental finding of width dependent failure current density also agrees with finding for theoretical heat transfer of the nanowire and substrate system as calculated with the finite element method. (c) 2008 American Institute of Physics.
C1 [Huang, Qiaojian; Lilley, Carmen M.] Univ Illinois, Dept Mech & Ind Engn, Engn Res Facil 3055, Chicago, IL 60607 USA.
   [Bode, Matthias; Divan, Ralu] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Lilley, CM (reprint author), Univ Illinois, Dept Mech & Ind Engn, Engn Res Facil 3055, 842 W Taylor St, Chicago, IL 60607 USA.
EM clilley@uic.edu
RI Huang, Qiaojian/A-4951-2010; Bode, Matthias/S-3249-2016
OI Bode, Matthias/0000-0001-7514-5560
NR 27
TC 50
Z9 52
U1 2
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 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUL 15
PY 2008
VL 104
IS 2
AR 023709
DI 10.1063/1.2956703
PG 6
WC Physics, Applied
SC Physics
GA 333TH
UT WOS:000258174800060
ER

PT J
AU Steen, C
   Martinez-Limia, A
   Pichler, P
   Ryssel, H
   Paul, S
   Lerch, W
   Pei, L
   Duscher, G
   Severac, F
   Cristiano, F
   Windl, W
AF Steen, C.
   Martinez-Limia, A.
   Pichler, P.
   Ryssel, H.
   Paul, S.
   Lerch, W.
   Pei, L.
   Duscher, G.
   Severac, F.
   Cristiano, F.
   Windl, W.
TI Distribution and segregation of arsenic at the SiO2/Si interface
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID RAY-FLUORESCENCE SPECTROMETRY; DOPED SILICON; SI; OXIDATION; ANTIMONY;
   MODEL
AB The segregation and pile-up of arsenic atoms at the Si/SiO2 interface in steady state was investigated in detail by a combination of gracing incidence x-ray fluorescence spectroscopy (GI-XRF) measurements, electrical measurements, etching on the nanometer scale, and measurements of the step heights by interferometry. Using GI-XRF measurements and removal of the highly doped segregation layer by a sensitive etching process it was possible to distinguish clearly between the piled-up atoms and the arsenic atoms in the bulk over a large range of implantation doses, from 3x10(12) to 1x10(16) cm(-2). The samples were annealed at different temperatures from 900 degrees C to 1200 degrees C for time periods long enough to make sure that the segregation reflects an equilibrium state. With additional step height measurements at line-space structures, the thickness of the layer with the piled-up arsenic and the shape of the segregation profile was determined. Electrical measurements indicated that the segregated arsenic atoms are deep donors with an electrical activity that increases eventually to full electrical activation for high sheet concentrations of the segregated atoms. The measured data can be modeled as a steady state of neutral arsenic atoms in the segregation layer with positively charged substitutional arsenic atoms and free electrons. For the highest concentration, a saturation of the sheet concentration of segregated arsenic atoms was observed that correlates with the increase in electrical activation. For the use in process simulation programs, a three-phase segregation model was adapted and calibrated. (C) 2008 American Institute of Physics.
C1 Univ Erlangen Nurnberg, Chair Electron Devices, D-91058 Erlangen, Germany.
   Fraunhofer Inst Integrated Syst & Device Technol, D-91058 Erlangen, Germany.
   Mattson Thermal Prod GmbH, D-89160 Dornstadt, Germany.
   N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA.
   Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA.
   Univ Toulouse, LAAS, CNRS, F-31077 Toulouse, France.
   Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA.
RP Steen, C (reprint author), Univ Erlangen Nurnberg, Chair Electron Devices, Cauerstr 6, D-91058 Erlangen, Germany.
EM peter.pichler@iisb.fraunhofer.de
RI Windl, Wolfgang/C-7255-2012; Duscher, Gerd/G-1730-2014
OI Windl, Wolfgang/0000-0001-5892-0684; Duscher, Gerd/0000-0002-2039-548X
NR 35
TC 18
Z9 18
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUL 15
PY 2008
VL 104
IS 2
AR 023518
DI 10.1063/1.2956700
PG 11
WC Physics, Applied
SC Physics
GA 333TH
UT WOS:000258174800032
ER

PT J
AU Thompson, JDW
   Neal, JR
   Shen, TH
   Morton, SA
   Tobin, JG
   Waddill, GD
   Matthew, JAD
   Greig, D
   Hopkinson, M
AF Thompson, Jamie D. W.
   Neal, James R.
   Shen, Tiehan H.
   Morton, Simon A.
   Tobin, James G.
   Waddill, G. Dan
   Matthew, Jim A. D.
   Greig, Denis
   Hopkinson, Mark
TI The evolution of Ga and As core levels in the formation of Fe/GaAs(001):
   A high resolution soft x-ray photoelectron spectroscopic study
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID EPITAXIAL FE FILMS; MOLECULAR-BEAM EPITAXY; SUBSTRATE SURFACE
   RECONSTRUCTION; DECAPPED GAAS(100) SURFACES; MAGNETIC-PROPERTIES;
   INTERFACE COMPOSITION; THIN-FILMS; GAAS(001); GROWTH; SPIN
AB A high resolution soft x-ray photoelectron spectroscopic study of Ga and As 3d core levels has been conducted for Fe/GaAs (001) as a function of Fe thickness. This work has provided unambiguous evidence of substrate disrupting chemical reactions induced by the Fe overlayer-a quantitative analysis of the acquired spectra indicates significantly differing behavior of Ga and As during Fe growth, and our observations have been compared with existing theoretical models. Our results demonstrate that the outdiffusing Ga and As remain largely confined to the interface region, forming a thin intermixed layer. Whereas at low coverages Fe has little influence on the underlying GaAs substrate, the onset of substrate disruption when the Fe thickness reaches 3.5 angstrom results in major changes in the energy distribution curves (EDCs) of both As and Ga 3d cores. Our quantitative analysis suggests the presence of two additional As environments of metallic character: one bound to the interfacial region and another which, as confirmed by in situ oxidation experiments, surface segregates and persists over a wide range of overlayer thickness. Analysis of the corresponding Ga 3d EDCs found not two, but three additional environments-also metallic in nature. Two of the three are interface resident whereas the third undergoes outdiffusion at low Fe coverages. Based on the variations of the integrated intensities of each component, we present a schematic of the proposed chemical makeup of the Fe/GaAs (001) system. (c) 2008 American Institute of Physics.
C1 [Thompson, Jamie D. W.; Neal, James R.; Shen, Tiehan H.] Univ Salford, Inst Mat Res, Joule Phys Lab, Salford M5 4WT, Lancs, England.
   [Morton, Simon A.; Tobin, James G.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   [Waddill, G. Dan] Missouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 USA.
   [Matthew, Jim A. D.] Univ York, Dept Phys, York YO1 5DD, N Yorkshire, England.
   [Greig, Denis] Univ Leeds, Dept Phys & Astron, Leeds LS2 9JT, W Yorkshire, England.
   [Hopkinson, Mark] Univ Sheffield, EPSRC Natl Ctr Technol 3 4, Sheffield S1 3JD, S Yorkshire, England.
RP Shen, TH (reprint author), Univ Salford, Inst Mat Res, Joule Phys Lab, Salford M5 4WT, Lancs, England.
EM t.shen@salford.ac.uk
RI Hopkinson, Mark/H-8239-2012; Tobin, James/O-6953-2015; 
OI Hopkinson, Mark/0000-0002-8097-6913
NR 52
TC 6
Z9 6
U1 1
U2 10
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 JUL 15
PY 2008
VL 104
IS 2
AR 024516
DI 10.1063/1.2942395
PG 12
WC Physics, Applied
SC Physics
GA 333TH
UT WOS:000258174800130
ER

PT J
AU Torija, MA
   Sharma, M
   Fitzsimmons, MR
   Varela, M
   Leighton, C
AF Torija, M. A.
   Sharma, M.
   Fitzsimmons, M. R.
   Varela, M.
   Leighton, C.
TI Epitaxial La0.5Sr0.5CoO3 thin films: Structure, magnetism, and transport
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID SPIN-STATE-TRANSITION; ELECTRICAL-PROPERTIES; PHASE-SEPARATION;
   CLUSTER-GLASS; MAGNETORESISTANCE; LA1-XSRXCOO3; LACOO3; MANGANITES;
   ITINERANT; COBALTITE
AB La1-xSrxCoO3 has received considerable attention in bulk form. This is due to interest in the fundamental magnetic properties (spin-state transitions and magnetic phase separation) as well as potential applications in ferroelectric memory and solid-oxide fuel cells. The structure and properties in thin film form are not well understood, and the influence of dimensional confinement on effects such as magnetic phase separation is unknown. Here, we report a comprehensive investigation of structure, magnetism, and transport in strained epitaxial La0.5Sr0.5CoO3 (001) films deposited on SrTiO3 (001) substrates by reactive dc magnetron sputtering. The crystalline quality, phase purity, strain state, oxygen stoichiometry, morphology, and magnetic and electronic properties of the epilayers are all probed and are found to be particularly sensitive to the total sputtering gas pressure and the ratio of reactive to inert gas (PO2/PAr). The various structure-property relationships are discussed in detail, particularly with respect to the degree of oxygenation and oxygen-induced resputtering. The films are strained and tetragonally distorted due to the 1.9% lattice mismatch with SrTiO3. Significant strain relaxation occurs at thicknesses around 200 angstrom, resulting in a crossover from two-dimensional-like to three-dimensional growth. Polarized neutron reflectometry was combined with x-ray reflectometry to obtain chemical and magnetic depth profiles, which are compared with cross-sectional scanning transmission electron microscopy. The results indicate a thin (similar to 10 angstrom) layer at the film/substrate interface with significantly different structural properties to the bulk of the film, as well as a strongly graded magnetic and chemical profile at the film surface due to the significant roughness. The Curie temperature was found to decrease very slowly as the thickness is reduced down to similar to 50 angstrom, at which point a rapid decrease occurs, almost coincident with a sharp decrease in saturation magnetization. At this point, the temperature dependence of the resistivity shows a crossover from metallic to insulating, accompanied by dramatic changes in the magnetoresistance. The magnetoresistance has a negative contribution peaking around the Curie point (similar to that seen in bulk), a second negative contribution occurring at low temperature (only for the thinnest samples), as well as a large anisotropic magnetoresistance, which vanishes at the Curie point. Remarkably, the low temperature contribution in the thinnest x=0.5 films bears a striking resemblance to that seen in the insulating phase (x < 0.17) in bulk, suggesting the formation of a nonmetallic phase at low thickness that is similar to the low doping bulk phase, i.e., magnetic phase separation near the interface with SrTiO3. (c) 2008 American Institute of Physics.
C1 [Torija, M. A.; Sharma, M.; Leighton, C.] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA.
   [Fitzsimmons, M. R.] Los Alamos Natl Lab, Los Alamos Neutron Sci Ctr, Los Alamos, NM 87545 USA.
   [Varela, M.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Leighton, C (reprint author), Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA.
EM leighton@umn.edu
RI Lujan Center, LANL/G-4896-2012; Varela, Maria/H-2648-2012; Varela,
   Maria/E-2472-2014
OI Varela, Maria/0000-0002-6582-7004
NR 96
TC 35
Z9 37
U1 8
U2 79
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 JUL 15
PY 2008
VL 104
IS 2
AR 023901
DI 10.1063/1.2955725
PG 17
WC Physics, Applied
SC Physics
GA 333TH
UT WOS:000258174800067
ER

PT J
AU Yan, HF
   Kalenci, O
   Noyan, IC
   Maser, J
AF Yan, Hanfei
   Kalenci, Oezguer
   Noyan, I. Cevdet
   Maser, Joerg
TI Coherency effects in nanobeam x-ray diffraction analysis
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID PENDELLOSUNG FRINGES; DYNAMICAL THEORY; SINGLE-CRYSTALS;
   MICRODIFFRACTION; MICROSCOPE; MICROBEAMS; GRADIENTS; WAVE
AB We describe the evolution of the x-ray scattering pattern which forms on an area detector when a divergent, coherent nanobeam is diffracted from a perfect or weakly deformed single crystal. We show that the scattering can be considered as virtual diffraction from an angular aperture in reciprocal space; this is analogous to pinhole diffraction in real space. We define an angular Fresnel number, Y-A, which allows the categorization of the nanodiffraction image into near-field, intermediate-field, and far-field regimes. We provide equations for Y-A in simple geometries and show that dynamical scattering artifacts are eliminated through wave interference in the far-field image; this is the only regime where direct analysis of the charge coupled device image using geometrical formulae to transform distances to diffraction angles is possible. (C) 2008 American Institute of Physics.
C1 [Yan, Hanfei] Brookhaven Natl Lab, Natl Synchrotron Light Source 2, Upton, NY 11973 USA.
   [Yan, Hanfei; Kalenci, Oezguer; Maser, Joerg] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
   [Kalenci, Oezguer; Noyan, I. Cevdet] Columbia Univ, Dept Appl Phys & Math, New York, NY 10027 USA.
RP Yan, HF (reprint author), Brookhaven Natl Lab, Natl Synchrotron Light Source 2, Upton, NY 11973 USA.
EM hyan@bnl.gov
RI Maser, Jorg/K-6817-2013; Yan, Hanfei/F-7993-2011
OI Yan, Hanfei/0000-0001-6824-0367
NR 32
TC 5
Z9 5
U1 0
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUL 15
PY 2008
VL 104
IS 2
AR 023506
DI 10.1063/1.2955714
PG 7
WC Physics, Applied
SC Physics
GA 333TH
UT WOS:000258174800020
ER

PT J
AU Zuo, QH
   Dienes, JK
   Middleditch, J
   Meyer, HW
AF Zuo, Q. H.
   Dienes, J. K.
   Middleditch, J.
   Meyer, H. W., Jr.
TI Modeling anisotropic damage in an encapsulated ceramic under ballistic
   impact
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID SILICON-CARBIDE; INELASTIC DEFORMATION; BRITTLE MATERIALS; SHOCK
   RESPONSE; BORON-CARBIDE; PENETRATION; BEHAVIOR; TITANIUM; TARGETS;
   CRACKS
AB This paper presents a study of anisotropic damage and cracking in a hot isostatically pressed assembly of titanium alloy encapsulated AD-995 ceramic under ballistic impact using the statistical crack mechanics approach. Anisotropy of crack growth in the ceramic is illustrated numerically by examining the growth in crack sizes along three orientations. Comparisons with the experimental measurements of the predicted backsurface profile and the damage (cracking) in the ceramic suggest that the model predictions are consistent with the experimental data. Numerical simulation also indicates that a prestress of roughly 2 kbar (200 MPa) compensates for about 1% of initial porosity in the ceramic. A comparison is made to the Rajendran-Grove ceramic model in EPIC which assumes an isotropic crack distribution. (C) 2008 American Institute of Physics.
C1 [Zuo, Q. H.] Univ Alabama, Dept Mech & Aerosp Engn, Huntsville, AL 35899 USA.
   [Dienes, J. K.; Middleditch, J.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   [Meyer, H. W., Jr.] USA, Res Lab, Impact Phys Branch, Aberdeen Proving Ground, MD 21005 USA.
RP Zuo, QH (reprint author), Univ Alabama, Dept Mech & Aerosp Engn, Huntsville, AL 35899 USA.
EM zuo@eng.uah.edu
NR 33
TC 6
Z9 6
U1 2
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 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUL 15
PY 2008
VL 104
IS 2
AR 023508
DI 10.1063/1.2956509
PG 10
WC Physics, Applied
SC Physics
GA 333TH
UT WOS:000258174800022
ER

PT J
AU Voltz, K
   Trylska, J
   Tozzini, V
   Kurkal-Siebert, V
   Langowski, J
   Smith, J
AF Voltz, Karine
   Trylska, Joanna
   Tozzini, Valentina
   Kurkal-Siebert, Vandana
   Langowski, Joerg
   Smith, Jeremy
TI Coarse-grained force field for the nucleosome from self-consistent
   multiscaling
SO JOURNAL OF COMPUTATIONAL CHEMISTRY
LA English
DT Article
DE chromatin; molecular dynamics; mesoscopic models; radial distribution
   function; fluctuations
ID MOLECULAR-DYNAMICS SIMULATION; RESONANCE ENERGY-TRANSFER; CORE PARTICLE;
   LONG-RANGE; BIOMOLECULAR SYSTEMS; HIV-1 PROTEASE; NUCLEIC-ACIDS; DNA;
   MODEL; POTENTIALS
AB A coarse-grained simulation model for the nucleosome is developed, using a methodology modified from previous work on the ribosome. Protein residues and DNA nucleotides are represented as beads, interacting through harmonic (for neighboring) or Morse (for nonbonded) potentials. Force-field parameters were estimated by Boltzmann inversion of the corresponding radial distribution functions obtained from a 5-ns all-atom molecular dynamics (MD) simulation, and were refined to produce agreement with the all-atom MD simulation. This self-consistent multiscale approach yields a coarse-grained model that is capable of reproducing equilibrium structural properties calculated from a 50-ns all-atom MD simulation. This coarse-grained model speeds up nucleosome simulations by a factor of 10(3) and is expected to be useful in examining biologically relevant dynamical nucleosome phenomena on the microsecond timescale and beyond. (C) 2008 Wiley Periodicals, Inc.
C1 [Voltz, Karine; Langowski, Joerg] German Canc Res Ctr, D-6900 Heidelberg, Germany.
   [Voltz, Karine; Kurkal-Siebert, Vandana; Smith, Jeremy] Univ Heidelberg, IWR, Heidelberg, Germany.
   [Trylska, Joanna] Univ Warsaw, Interdisciplinary Ctr Math & Computat Modelling, Warsaw, Poland.
   [Tozzini, Valentina] NEST CNR INFM Scuola Normale Super, Pisa, Italy.
   [Kurkal-Siebert, Vandana] BASF AG, Ludwigshafen, Germany.
   [Smith, Jeremy] Oak Ridge Natl Lab, Ctr Biophys Mol, Oak Ridge, TN 37831 USA.
RP Langowski, J (reprint author), German Canc Res Ctr, D-6900 Heidelberg, Germany.
EM jl@dkfz.de
RI Tozzini, Valentina/E-8206-2011; Langowski, Jorg/A-1843-2011; 
OI Tozzini, Valentina/0000-0002-7586-5039; Langowski,
   Jorg/0000-0001-8600-0666; Smith, Jeremy/0000-0002-2978-3227
FU FIC NIH HHS [R03 TW07318]
NR 44
TC 52
Z9 53
U1 1
U2 18
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0192-8651
J9 J COMPUT CHEM
JI J. Comput. Chem.
PD JUL 15
PY 2008
VL 29
IS 9
BP 1429
EP 1439
DI 10.1002/jcc.20902
PG 11
WC Chemistry, Multidisciplinary
SC Chemistry
GA 305XU
UT WOS:000256211900008
PM 18270964
ER

PT J
AU Cederberg, JG
   Blaich, JD
   Girard, GR
   Lee, SR
   Nelson, DP
   Murray, CS
AF Cederberg, J. G.
   Blaich, J. D.
   Girard, G. R.
   Lee, S. R.
   Nelson, D. P.
   Murray, C. S.
TI The development of (InGa)As thermophotovoltaic cells on InP using
   strain-relaxed In(PAs) buffers
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article
DE metal-organic chemical vapor deposition; semiconducting III-V materials;
   infrared devices
ID MOLECULAR-BEAM EPITAXY; VAPOR-PHASE EPITAXY; ENERGY-CONVERSION;
   INASYP1-Y; PROGRESS; GROWTH
AB We have investigated thermophotovoltaic monolithic interconnected modules fabricated from In0.68Ga0.32As on InP using In(PAs) buffer layers to mitigate the lattice mismatch. The growth of these devices presented several challenges. For example, the n-type dopant Te forms a persistent surface-segregation layer on In(PAs) and (InGa)As layers, which unintentionally distributes Te into subsequently deposited layers. To solve this problem, we identified growth conditions that promote Te desorption from the InGaAs surface, thereby enabling the formation of sharp doping profiles. Another significant challenge involved In-rich surface defects, which form during In0.68Ga0.32As growth and act as shunt paths that severely reduce cell performance. To address this problem, we implemented pre-growth 100 cm(-2) particle-control procedures that allow surface defect densities below to be obtained. Our progress allowed the demonstration of thermophotovoltaic cells producing 348 mV/junction open-circuit voltage with a fill factor exceeding 70%. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Cederberg, J. G.; Blaich, J. D.; Girard, G. R.; Lee, S. R.; Nelson, D. P.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
   [Murray, C. S.] Gen Atom Corp, San Diego, CA 92121 USA.
RP Cederberg, JG (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM jgceder@sandia.gov
NR 20
TC 13
Z9 14
U1 1
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-0248
J9 J CRYST GROWTH
JI J. Cryst. Growth
PD JUL 15
PY 2008
VL 310
IS 15
BP 3453
EP 3458
DI 10.1016/j.jcrysgro.2008.04.037
PG 6
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA 336GV
UT WOS:000258353200011
ER

PT J
AU Babentsov, V
   Franc, J
   Fauler, A
   Fiederle, M
   James, RB
AF Babentsov, V.
   Franc, J.
   Fauler, A.
   Fiederle, M.
   James, R. B.
TI Distribution of zinc, resistivity, and photosensitivity in a vertical
   Bridgman grown Cd1-xZnxTe ingot
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article
DE point defects; Bridgman technique; semiconducting II-VI materials
ID CDTE; CRYSTALS; CDZNTE; TELLURIDE; IMPURITY; DEFECTS; NONSTOICHIOMETRY;
   DEPENDENCE; (CD,ZN)TE
AB We present the results of a comprehensive study of distribution of zinc, resistivity, and photosensitivity in a Cd1-xZnxTe ingot grown by the vertical Bridgman method. We used several complementary methods, viz., glow discharge mass spectroscopy, photoluminescence, resistivity-, and photosensitivity-mapping, along with photo-induced current transient spectroscopy to characterize the material. We identified electronic levels in the bandgap responsible for compensation, recombination, and photosensitivity. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Franc, J.] Charles Univ Prague, Inst Phys, Fac Math & Phys, CZ-12116 Prague, Czech Republic.
   [Babentsov, V.] Inst Semicond Phys, UA-03028 Kiev, Ukraine.
   [Fauler, A.; Fiederle, M.] Mat Forschungszentrum, D-79104 Freiburg, Germany.
   [James, R. B.] Brookhaven Natl Lab, Nonproliferat & Natl Secur Dept, Upton, NY 11973 USA.
RP Franc, J (reprint author), Charles Univ Prague, Inst Phys, Fac Math & Phys, Ke Karlovu 5, CZ-12116 Prague, Czech Republic.
EM franc@karlov.mff.cuni.cz
RI Fiederle, Michael/B-9750-2013; Franc, Jan/C-3802-2017
OI Franc, Jan/0000-0002-9493-3973
NR 31
TC 16
Z9 17
U1 0
U2 10
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-0248
J9 J CRYST GROWTH
JI J. Cryst. Growth
PD JUL 15
PY 2008
VL 310
IS 15
BP 3482
EP 3487
DI 10.1016/j.jcrysgro.2008.05.017
PG 6
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA 336GV
UT WOS:000258353200017
ER

PT J
AU Fornasiero, F
   Tang, D
   Boushehri, A
   Prausnitz, J
   Radke, CJ
AF Fornasiero, Francesco
   Tang, Darren
   Boushehri, Ali
   Prausnitz, John
   Radke, C. J.
TI Water diffusion through hydrogel membranes - A novel evaporation cell
   free of external mass-transfer resistance
SO JOURNAL OF MEMBRANE SCIENCE
LA English
DT Article
DE evaporation cell; zero external mass-transfer resistance;
   water-diffusion coefficient; soft-contact-lens; extended Maxwell-Stefan
   theory
ID SOFT-CONTACT-LENS; POLYMER-SOLVENT SYSTEMS; POSTLENS TEAR FILM;
   STATISTICAL-MECHANICS; PERMEABILITY; COEFFICIENTS; DEHYDRATION;
   DEPENDENCE; EYE
AB A novel evaporative cell is used to measure steady-state gradient-driven diffusion rates of water through hydrogel membranes in the absence of external mass-transfer resistance. In this cell, the bottom surface of a hydrogel membrane is exposed to pure water vapor at known activity (a(w)) less than unity, while a sealed liquid-water reservoir bathes the upper membrane surface. induced by the chemical-potential gradient between the two surfaces, the water evaporation rate is monitored by the rate of weight loss of the water reservoir.
   Results at ambient temperature are compared with those from measured water flux through soft-contact-lens (SCL) materials and with other published experimental results. Concentration-dependent water diffusivities are obtained by interpreting measured water fluxes for 0.11 <= a(w) <= 0.93 with extended Maxwell-Stefan (EMS) diffusion theory. Thermodynamic non-ideality is taken into account through Flory-Rehner polymer-solution theory. Shrinking/swelling is modeled by conservation of the total polymer mass assuming volume additivity. In spite of correction for thermodynamic non-ideality, EMS-water-diffusion coefficients increase with the water volume fraction, especially strongly for those hydrogel materials with low liquid-saturated water contents. The evaporation cell described here provides a simple robust method to establish water transport rates through soft-contact-lenses and other hydrogel membranes without the need to correct for external mass-transfer resistance. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Fornasiero, Francesco; Tang, Darren; Boushehri, Ali; Prausnitz, John; Radke, C. J.] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
   [Prausnitz, John] Div Chem Sci, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   [Radke, C. J.] Univ Calif Berkeley, Vision Sci Grp, Berkeley, CA 94720 USA.
RP Radke, CJ (reprint author), Univ Calif Berkeley, Dept Chem Engn, 101 E Gilman, Berkeley, CA 94720 USA.
EM radke@berkeley.edu
RI Fornasiero, Francesco/I-3802-2012
NR 38
TC 11
Z9 11
U1 1
U2 17
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0376-7388
J9 J MEMBRANE SCI
JI J. Membr. Sci.
PD JUL 15
PY 2008
VL 320
IS 1-2
BP 423
EP 430
DI 10.1016/j.memsci.2008.04.032
PG 8
WC Engineering, Chemical; Polymer Science
SC Engineering; Polymer Science
GA 328YS
UT WOS:000257834700048
ER

PT J
AU Mansur, LK
AF Mansur, Louis K.
TI Professor Robert W. Cahn - Obituary
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Biographical-Item
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Mansur, LK (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA.
EM mansurlk@ornl.gov
NR 1
TC 0
Z9 0
U1 0
U2 1
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 JUL 15
PY 2008
VL 377
IS 3
BP III
EP III
DI 10.1016/j.jnucmat.2008.04.003
PG 1
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 332AG
UT WOS:000258053400001
ER

PT J
AU Li, ML
   Byun, TS
   Snead, LL
   Zinkle, SJ
AF Li, Meimei
   Byun, T. S.
   Snead, L. L.
   Zinkle, S. J.
TI Low-temperature thermally-activated deformation and irradiation
   softening in neutron-irradiated molybdenum
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID BCC METALS; ELECTRON CONCENTRATION; TENSILE PROPERTIES; SINGLE-CRYSTALS;
   SOLID SOLUTIONS; FLOW-STRESS; ALLOYS; ENERGY
AB The effect of neutron irradiation on low-temperature deformation of Mo in two heat treatments, i.e. annealed and stress-relieved, was investigated. Specimens were irradiated at reactor coolant temperature (_80 *Q to doses ranging from 7.2 x 10' to 0.28 dpa in the High Flux Isotope Reactor. Tensile tests were carried out between -50 and 100 IC at strain rates of 1 X 10-5_1 X 10-2 s-1. Thermal activation analysis based on tensile data was performed to understand the low-temperature deformation mechanism. Irradiation softening and reduced dependence on test temperature and strain rate of the yield stress was observed in the annealed Mo after low-dose neutron irradiation (<-0.003 dpa). Higher dose neutron irradiation caused athermal hardening only. The stress-relieved Mo showed a weaker dependence on test temperature and strain rate of the yield stress than the annealed Mo, and the dependence of the yield stress of the stress-relieved Mo was nearly unchanged after irradiation. Comparison of the experimental values of activation parameters with the theoretical predictions of dislocation models indicates that the Fleischer model of interactions of dislocations with tetTagonal strains gave a better description of the activation process than the double-kink model, which implies a scavenging effect. The reduced test temperature and strain rate dependence following irradiation may be explained by the decreased effective stress due to trapping of interstitial solute species by neutron-produced defects. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Li, Meimei; Byun, T. S.; Snead, L. L.; Zinkle, S. J.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Li, ML (reprint author), Argonne Natl Lab, Nucl Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM mli@anl.gov
OI Zinkle, Steven/0000-0003-2890-6915
NR 37
TC 5
Z9 5
U1 0
U2 14
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 JUL 15
PY 2008
VL 377
IS 3
BP 409
EP 414
DI 10.1016/j.jnucmat.2008.03.017
PG 6
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 332AG
UT WOS:000258053400002
ER

PT J
AU Klueh, RL
   Shiba, K
   Sokolov, MA
AF Klueh, R. L.
   Shiba, K.
   Sokolov, M. A.
TI Embrittlement of irradiated ferritic/martensitic steels in the absence
   of irradiation hardening
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID ACTIVATION FERRITIC ALLOYS; CR-MO STEELS; MARTENSITIC STEELS; TENSILE
   PROPERTIES; NEUTRON-IRRADIATION; FRACTURE-TOUGHNESS; IMPACT PROPERTIES;
   HEAT-TREATMENT; HFIR; 9CR-1MOVNB
AB irradiation damage caused by neutron irradiation below 425-450 DC of 9-12% Cr ferritic/martensitic steels produces microstructural defects that cause an increase in yield stress. This irradiation hardening causes embrittlement observed in a Charpy impact test as an increase in the ductile-brittle transition temperature. Little or no change in strength is observed in steels irradiated above 425-450 oC. Therefore, the general conclusion has been that no embrittlement occurs above these temperatures. In a recent study, significant embrittlement was observed in F82H steel irradiated at 500 *C to 5 and 20 dpa without any change in strength. Earlier studies on several conventional steels also showed embrittlement effects above the irradiation-hardening temperature regime. indications are that this embrittlement is caused by irradiation-accelerated or irradiation-induced precipitation. Observations of embrittlement in the absence of irradiation hardening that were previously reported in the literature have been examined and analyzed with computational thermodynamics calculations to illuminate and understand the effect. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Klueh, R. L.; Sokolov, M. A.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
   [Shiba, K.] Japan Atom Energy Agcy, Ibaraki, Japan.
RP Klueh, RL (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, POB 2008 MS6138, Oak Ridge, TN 37831 USA.
EM kluehrl@ornl.gov
NR 49
TC 18
Z9 18
U1 2
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 JUL 15
PY 2008
VL 377
IS 3
BP 427
EP 437
DI 10.1016/j.jnucmat.2008.04.002
PG 11
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 332AG
UT WOS:000258053400005
ER

PT J
AU O'Brien, RC
   Ambrosi, RM
   Bannister, NP
   Howe, SD
   Atkinson, HV
AF O'Brien, R. C.
   Ambrosi, R. M.
   Bannister, N. P.
   Howe, S. D.
   Atkinson, H. V.
TI Safe radioisotope thermoelectric generators and heat sources for space
   applications
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID WC-CO POWDER; MICROSTRUCTURE; POWER
AB Several isotopes are examined as alternatives to 238pU that is traditionally used in radioisotope thermoelectric generators (RTGs) and heating units (RHUs). The radioisotopes discussed include 21'Am, 208po, 2'oPo, and 90Sr. The aim of this study is to facilitate the design of an RTG with a minimal radiation dose rate and mass including any required shielding. Applications of interest are primarily space and planetary exploration. In order to evaluate the properties of the alternative radioisotopes a Monte Carlo model was developed to examine the radiation protection aspect of the study. The thermodynamics of the power generation process is examined and possible materials for the housing and encapsulation of the radioisoropes are proposed. In this study we also present a historical review of radioisotope thermoelectric generators (RTGs) and the thermoelectric conversion mechanism in order to provide a direct comparison with the performance of our proposed alternative isotope systems. (c) 2008 Elsevier B.V. All rights reserved.
C1 [O'Brien, R. C.; Ambrosi, R. M.; Bannister, N. P.] Univ Leicester, Space Res Ctr, Leicester LE1 7RH, Leics, England.
   [Howe, S. D.] Idaho Natl Lab, Ctr Space Nucl Res, Idaho Falls, ID 83415 USA.
   [Atkinson, H. V.] Univ Leicester, Dept Engn, Leicester LE1 7RH, Leics, England.
RP O'Brien, RC (reprint author), Univ Leicester, Space Res Ctr, Univ Rd, Leicester LE1 7RH, Leics, England.
EM rco3@star.le.ac.uk
RI O'Brien, Robert/C-3355-2017
OI O'Brien, Robert/0000-0002-7479-6764
NR 46
TC 42
Z9 42
U1 5
U2 34
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 JUL 15
PY 2008
VL 377
IS 3
BP 506
EP 521
DI 10.1016/j.jnucmat.2008.04.009
PG 16
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 332AG
UT WOS:000258053400017
ER

PT J
AU Bose, AB
   Shaik, R
   Mawdsley, J
AF Bose, Anima B.
   Shaik, Ruhulla
   Mawdsley, Jennifer
TI Optimization of the performance of polymer electrolyte fuel cell
   membrane-electrode assemblies: Roles of curing parameters on the
   catalyst and ionomer structures and morphology
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE PEM fuel cells; membrane-electrode assembly fabrication; electrode
   morphology; lonomer dynamics; scanning electron microscopy
ID GAS-DIFFUSION ELECTRODES; LOADING ELECTRODES; NAFION CONTENT; REACTION
   LAYER; PLATINUM; CATHODE; ALLOY; DURABILITY; STABILITY; HUMIDITY
AB In order to understand the origin of performance variations in polymer electrolyte membrane fuel cells (PEMFCs), a series of membrane-electrode assemblies (MEAs) with identical electrode layer compositions were prepared using different electrode Curing conditions, their performances were evaluated, and their morphologies determined by scanning electron rnicroscopy (SEM). The polarization curves varied markedly primarily due to differences in morphologies of electrodes, which were dictated by the curing processes. The highest performing MEAs (1.46W cm(-2) peak power density at 3.2 A cm(-2) and 80 degrees C) were prepared using a slow curing process at a lower temperature, whereas those MEAs prepared using a faster curing process performed poorly (0.1948Wcm(-2) peak power density at 440mAcm(-2) and 80 degrees C). The slowly cured MEAs showed uniform electrode catalyst and ionomer distributions, as revealed in SEM images and elemental maps. The relatively faster cured materials exhibited uneven distribution of ionomer with significant catalyst clustering. Collectively, these results indicate that to achieve optimal performance, factors that affect the dynamics of the curing process, such as rate of solvent evaporation, must be carefully controlled to avoid solvent trapping, minimize catalyst coagulation, and promote even distribution of ionomer. (c) 2008 Published by Elsevier B.V.
C1 [Bose, Anima B.; Shaik, Ruhulla] No Illinois Univ, Dept Mech Engn, De Kalb, IL 60115 USA.
   [Mawdsley, Jennifer] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Bose, AB (reprint author), No Illinois Univ, Dept Mech Engn, De Kalb, IL 60115 USA.
EM bose@ceet.niu.edu
NR 40
TC 14
Z9 14
U1 9
U2 18
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 JUL 15
PY 2008
VL 182
IS 1
BP 61
EP 65
DI 10.1016/j.jpowsour.2008.03.070
PG 5
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
   Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 326FA
UT WOS:000257642500008
ER

PT J
AU Kim, DS
   Kim, YS
   Guiver, MD
   Ding, JF
   Pivovar, BS
AF Kim, Dae Sik
   Kim, Yu Seung
   Guiver, Michael D.
   Ding, Jianfu
   Pivovar, Bryan S.
TI Highly fluorinated comb-shaped copolymer as proton exchange membranes
   (PEMs): Fuel cell performance
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE comb-shaped copolymer; polyelectrolyte membrane; current density; MEA;
   proton conductivity; fuel cell
ID NAFION MEMBRANES; METHANOL; ELECTROLYTES; TRANSPORT; SYSTEMS; DESIGN
AB The fuel cell performance (DMFC and H-2/air) of highly fluorinated comb-shaped copolymer is reported. The initial performance of membrane electrode assemblies (MEAs) fabricated from comb-shaped copolymer containing a side-chain weight fraction of 22% are compared with those derived from Nafion and sulfonated polysulfone (BPSH-35) under DMFC conditions. The low water uptake of comb copolymer enabled an increase in proton exchange site concentrations in the hydrated polymer, which is a desirable membrane property for DMFC application. The comb-shaped copolymer architecture induces phase separated morphology between the hydrophobic fluoroaromatic backbone and the polysulfonic acid side chains. The initial performance of the MEAs using BPSH-35 and Comb 22 copolymer were comparable and higher than that of the Nafion MEA at all methanol concentrations. For example, the power density of the MEA using Comb 22 copolymer at 350 mA cm(-2) and 0.5 M methanol was 145 mW cm(-2), whereas the power densities of MEAs using BPSH-35 were 136 mW cm(-2). The power density of the MEA using Comb 22 copolymer at 350 mA cm(-2) and 2.0 M methanol was 144.5 mWcm(-2), whereas the power densities of MEAs using BPSH-35 were 143 mWcm(-2). (0 2008 Elsevier B.V. All rights reserved.
C1 [Kim, Dae Sik; Guiver, Michael D.; Ding, Jianfu] Natl Res Council Canada, Inst Chem Proc & Environm Technol, Ottawa, ON K1A 0R6, Canada.
   [Kim, Yu Seung; Pivovar, Bryan S.] Los Alamos Natl Lab, Mat Phys & Applicat Sensors & Electrochem Devices, Los Alamos, NM 87545 USA.
RP Guiver, MD (reprint author), Natl Res Council Canada, Inst Chem Proc & Environm Technol, 1200 Montreal Rd, Ottawa, ON K1A 0R6, Canada.
EM michael.guiver@nrc-cnrc.gc.ca
RI Guiver, Michael/I-3248-2016
OI Guiver, Michael/0000-0003-2619-6809
NR 17
TC 28
Z9 29
U1 4
U2 19
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 JUL 15
PY 2008
VL 182
IS 1
BP 100
EP 105
DI 10.1016/j.jpowsour.2008.03.065
PG 6
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
   Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 326FA
UT WOS:000257642500014
ER

PT J
AU Meinhardt, KD
   Kim, DS
   Chou, YS
   Weil, KS
AF Meinhardt, K. D.
   Kim, D. -S.
   Chou, Y. -S.
   Weil, K. S.
TI Synthesis and properties of a barium aluminosilicate solid oxide fuel
   cell glass-ceramic sealant
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE solid oxide fuel cell (SOFC); glass-ceramic sealant; coefficient of
   thermal expansion
ID CHEMICAL-STABILITY; CRYSTALLIZATION; INTERCONNECT; STACKS; SOFCS
AB A series of barium aluminosilicate glasses modified with CaO and B2O3 were prepared and evaluated with respect to their suitability in sealing planar solid oxide fuel cells (SOFCs). At a target operating temperature of 750 degrees C, the long-term coefficient of thermal expansion (CTE) of one particular composition (35 mol% BaO, 15 mol% CaO, 10 mol% B2O3, 5 mol% Al2O3, and bal. SiO2) was found to be particularly stable, due to devitrification to a mixture of glass and ceramic phases. This sealant composition exhibits minimal chemical interaction with the yttria-stabilized zirconia electrolyte, yet forms a strong bond with this material. Interactions with metal components were found to be more extensive and depended on the composition of the metal oxide scale that formed during sealing. Generally alumina-scale formers exhibited a more compact reaction zone with the glass than chromia-scale forming alloys. Mechanical measurements conducted on the bulk glass-ceramic and on seals formed using these materials indicate that the sealant is anticipated to display adequate long-term strength for most conventional stationary SOFC applications. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Meinhardt, K. D.; Kim, D. -S.; Chou, Y. -S.; Weil, K. S.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Weil, KS (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM Scott.Weil@pnl.gov
NR 31
TC 96
Z9 99
U1 2
U2 37
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 JUL 15
PY 2008
VL 182
IS 1
BP 188
EP 196
DI 10.1016/j.jpowsour.2008.03.079
PG 9
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
   Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 326FA
UT WOS:000257642500026
ER

PT J
AU Orlovskaya, N
   Lugovy, M
   Pathak, S
   Steinmetz, D
   Lloyd, J
   Fegely, L
   Radovic, M
   Payzant, EA
   Lara-Curzio, E
   Allard, LF
   Kuebler, J
AF Orlovskaya, Nina
   Lugovy, Mykola
   Pathak, Siddhartha
   Steinmetz, David
   Lloyd, John
   Fegely, Laura
   Radovic, Miladin
   Payzant, E. Andrew
   Lara-Curzio, Edgar
   Allard, Larry F.
   Kuebler, Jakob
TI Thermal and mechanical properties of LaCoO3 and La0.8Ca0.2CoO3
   perovskites
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE perovskite; strength; fracture toughness; thermal expansion; Young's
   modulus
ID STRESS-STRAIN BEHAVIOR; PHASE-TRANSITION; FERROELASTIC BEHAVIOR;
   FRACTURE-TOUGHNESS; SPIN-STATE; CERAMICS; EXPANSION; DIFFRACTION;
   COMPOSITES
AB In this work, the thermal and mechanical properties such as coefficient of thermal expansion, strength, Young's modulus and fracture toughness of LaCoO3 and La0.8Ca0.2CoO3 perovskites have been studied, as well as slow crack growth of La0.8Ca0.2CoO3. The mechanical performance of the two cobaltites have been evaluated in terms of their ferroelastic hysteresis properties such as non-symmetry in bending of both stress and strain distributions, non-linear deformation upon applied load from the arbitrary low stresses, and ferroelastic toughening. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Orlovskaya, Nina; Lugovy, Mykola] Univ Cent Florida, Dept Mech Mat & Aerosp Engn, Orlando, FL 32816 USA.
   [Pathak, Siddhartha; Steinmetz, David; Lloyd, John; Fegely, Laura] Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA.
   [Radovic, Miladin] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA.
   [Payzant, E. Andrew; Lara-Curzio, Edgar; Allard, Larry F.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN USA.
   [Kuebler, Jakob] EMPA, Mat Sci & Technol, Lab High Performance Ceram, Dubendorf, Switzerland.
RP Orlovskaya, N (reprint author), Univ Cent Florida, Dept Mech Mat & Aerosp Engn, Orlando, FL 32816 USA.
EM norlovsk@mail.ucf.edu
RI Payzant, Edward/B-5449-2009; 
OI Payzant, Edward/0000-0002-3447-2060; Kuebler, Jakob/0000-0003-1331-0721
NR 44
TC 29
Z9 29
U1 2
U2 14
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 JUL 15
PY 2008
VL 182
IS 1
BP 230
EP 239
DI 10.1016/j.jpowsour.2008.03.072
PG 10
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
   Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 326FA
UT WOS:000257642500029
ER

PT J
AU Belogolovsky, I
   Hou, PY
   Jacobson, CP
   Visco, SJ
AF Belogolovsky, I.
   Hou, P. Y.
   Jacobson, C. P.
   Visco, S. J.
TI Chromia scale adhesion on 430 stainless steel: Effect of different
   surface treatments
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE oxidation; reactive element; oxide-metal interface; porosity
ID HIGH-TEMPERATURE OXIDATION; OXIDE FUEL-CELLS; METALLIC INTERCONNECTS;
   PORE FORMATION; ALLOYS; SEGREGATION; RESISTANCE; COATINGS; IMPURITY;
   MICROSTRUCTURE
AB In the context of solid oxide fuel cell (SOFC) applications, the adhesion strength and failure location of chromia scale that developed on 430 stainless steel after various surface modifications prior to oxidations between 600 and 800 degrees C were evaluated. Results demonstrated that the tensile strength and nature of adhesion of the oxide/alloy interface on 430 stainless steel can be compromised by polishing, but can be improved by reducing surface impurities, increasing surface roughness and applying a coating that contains a reactive element, such as Y-nitrate. Optimally, a combination of firing in a reducing atmosphere and applying a thin yttrium nitrate coating was found to be especially effective. These findings identify surface modification techniques that improve scale adhesion for Cr(2)O(3)-forming metallic interconnects whether independently or beneath a protective coating. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Belogolovsky, I.; Hou, P. Y.; Jacobson, C. P.; Visco, S. J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Hou, PY (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM pyhou@lbl.gov
NR 27
TC 17
Z9 17
U1 2
U2 12
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 JUL 15
PY 2008
VL 182
IS 1
BP 259
EP 264
DI 10.1016/j.jpowsour.2008.03.080
PG 6
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
   Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 326FA
UT WOS:000257642500032
ER

PT J
AU Hu, JZ
   Kwak, JH
   Yang, ZG
   Osborn, W
   Markmaitree, T
   Shaw, LL
AF Hu, Jian Zhi
   Kwak, Ja Hun
   Yang, Zhenguo
   Osborn, William
   Markmaitree, Tippawan
   Shaw, Leon L.
TI Investigation of mechanical activation on Li-N-H systems using Li-6
   magic angle spinning nuclear magnetic resonance at ultra-high field
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE MAS NMR; Li-6; H-1; mechanical activation; hydrogen storage; dynamics
ID HYDROGEN STORAGE PROPERTIES; LITHIUM HYDRIDE; H-2 STORAGE; AMIDE; NMR;
   LINH2; IMIDE
AB The significantly enhanced spectral resolution in the Li-6 MAS NMR spectra of Li-N-H systems at ultra-high field of 21.1 T (corresponding to a proton Larmor frequency of 900 MHz) is exploited, for the first time, to study the detailed electronic and chemical environmental changes associated with mechanical activation (MA) of the Li-N-H system using high-energy balling milling. Complementary to ultra-high field studies, the hydrogen discharge dynamics are investigated using variable temperature in situ H-1 MAS NMR at 7.05T field. It is shown that the changes in the Li-6 MAS spectra of LiH and LiNH2 induced by MA can be separated from those of the LiOH and LiOH center dot H2O impurities in the samples, and a new Li-6 peak induced by MA, which has never been reported before, is identified with the aid of the ultra-high field. The formation of this new peak and its associated upfield shift are attributed to the increased lattice defects induced by ball milling, which in turn enhances hydrogen release of the LiH + LiNH2 mixture observed in the in situ study of the hydrogen discharge dynamics. The study also clearly indicates that ball milling at liquid nitrogen temperature produces more mechanical activation than ball milling at room temperature. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Hu, Jian Zhi; Kwak, Ja Hun; Yang, Zhenguo] Pacific NW Natl Lab, Richland, WA 99352 USA.
   [Osborn, William; Markmaitree, Tippawan; Shaw, Leon L.] Univ Connecticut, Dept Chem Mat & Biomol Engn, Storrs, CT 06269 USA.
RP Hu, JZ (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd, Richland, WA 99352 USA.
EM Jianzhi.Hu@pnl.gov
RI Hu, Jian Zhi/F-7126-2012; Osborn, Will/G-4526-2012; Kwak, Ja
   Hun/J-4894-2014
NR 26
TC 14
Z9 14
U1 0
U2 9
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 JUL 15
PY 2008
VL 182
IS 1
BP 278
EP 283
DI 10.1016/j.jpowsour.2008.04.007
PG 6
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
   Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 326FA
UT WOS:000257642500035
ER

PT J
AU Hu, YY
   Chmielewski, DJ
   Papadias, D
AF Hu, Yongyou
   Chmielewski, Donald J.
   Papadias, Dennis
TI Autothermal reforming of gasoline for fuel cell applications: Controller
   design and analysis
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE fuel cells; autothermal reforming; feedback control; feed-forward
   control
ID HYDROGEN GENERATION; MODEL; PROCESSOR
AB In this work, we address the control system options available to an autothermal reforming (ATR) reactor. The targeted application is within an on-board fuel processor for a hydrogen-fed low-temperature fuel cell. The feedback controller employs air feed rate as the manipulated variable and a measurement of catalyst temperature as the control variable. Disturbances include significant fluctuations in the measured temperature as well as large throughput changes, owning to the on-board application. Our investigation includes an analysis of a simple feedback configuration as well as feed-forward control structure. It is concluded that the feedback only method is insufficient for the unique challenges associated with on-board operation, which include fast start-up and quick load changes. While the feed-forward configuration improves performance, we found a fair amount of sensitivity with respect to model mismatch. The general conclusion is that some form of advanced control will be needed to meet the stringent performance requirements of the on-board fuel processor application. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Hu, Yongyou; Chmielewski, Donald J.] IIT, Dept Biol & Chem Engn, Ctr Electrochem Sci & Engn, Chicago, IL 60616 USA.
   [Papadias, Dennis] Argonne Natl Lab, Div Chem Engn, Argonne, IL 60439 USA.
RP Chmielewski, DJ (reprint author), IIT, Dept Biol & Chem Engn, Ctr Electrochem Sci & Engn, 10 W 33rd St,Suite 127, Chicago, IL 60616 USA.
EM chmielewski@iit.edu
NR 11
TC 11
Z9 11
U1 0
U2 1
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 JUL 15
PY 2008
VL 182
IS 1
BP 298
EP 306
DI 10.1016/j.jpowsour.2008.03.041
PG 9
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
   Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 326FA
UT WOS:000257642500038
ER

PT J
AU Spoerke, ED
   Bachand, GD
   Liu, J
   Sasaki, D
   Bunker, BC
AF Spoerke, Erik D.
   Bachand, George D.
   Liu, Jun
   Sasaki, Darryl
   Bunker, Bruce C.
TI Directing the polar organization of microtubules
SO LANGMUIR
LA English
DT Article
ID MICROFABRICATED CHAMBERS; SELF-ORGANIZATION; NANOMETER-SCALE; IN-VITRO;
   TRANSPORT; MOTORS; DRIVEN; ARRAYS; LITHOGRAPHY; CENTROSOMES
AB Microtubules (MTs) are polar protein filaments that participate in critical biological functions ranging from motor protein direction to coordination of chromosome separation during cell division. The effective facilitation of these processes, however, requires careful regulation of the polar orientation and spatial organization of the assembled MTs. We describe here an artificial approach to polar MT assembly that enables us to create three-dimensional polar-oriented synthetic microtubule organizing centers (POSMOCs). Utilizing engineered MT polymerization in concert with functionalized micro- and nanoscale particles, we demonstrate the controllable polar assembly of MTs into asters and the variations in aster structure determined by the interactions between the MTs and the functionalized organizing particles. Inspired by the aster-like form of biological structures such as centrosomes, these POSMOCs represent a key step toward replicating biology's complex materials assembly machinery.
C1 [Spoerke, Erik D.; Liu, Jun; Bunker, Bruce C.] Sandia Natl Labs, Dept Elect & Nanostruct Mat, Albuquerque, NM 87123 USA.
   [Bachand, George D.; Sasaki, Darryl] Sandia Natl Labs, Dept Biomol Interfaces & Syst, Albuquerque, NM 87123 USA.
RP Spoerke, ED (reprint author), Sandia Natl Labs, Dept Elect & Nanostruct Mat, POB 5800,MS 1411, Albuquerque, NM 87185 USA.
EM edspoer@sandia.gov
OI Bachand, George/0000-0002-3169-9980
NR 25
TC 9
Z9 9
U1 0
U2 8
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD JUL 15
PY 2008
VL 24
IS 14
BP 7039
EP 7043
DI 10.1021/la800500c
PG 5
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
   Multidisciplinary
SC Chemistry; Materials Science
GA 323SI
UT WOS:000257468300001
PM 18564864
ER

PT J
AU Guan, XY
   Wang, LJ
   Dosen, A
   Tang, R
   Giese, RF
   Giocondi, JL
   Orme, CA
   Hoyer, JR
   Nancollas, GH
AF Guan, Xiangying
   Wang, Lijun
   Dosen, Anja
   Tang, Ruikang
   Giese, Rossman F.
   Giocondi, Jennifer L.
   Orme, Christine A.
   Hoyer, John R.
   Nancollas, George H.
TI An understanding of renal stone development in a mixed oxalate-phosphate
   system
SO LANGMUIR
LA English
DT Article
ID CALCIUM-OXALATE; URINARY CALCULI; DISSOLUTION; CRYSTALLIZATION;
   BRUSHITE; DIHYDRATE; KINETICS; HYDROXYAPATITE; PRECIPITATION;
   DIFFRACTION
AB The in vivo formation of calcium oxalate concretions having calcium phosphate nidi is simulated in an in vitro (37 degrees C, pH 6.0) dual constant composition (DCC) system undersaturated (sigma(DCPD) = -0.330) with respect to brushite (DCPD, CaHPO(4)center dot 2H(2)O) and slightly supersaturated (sigma(COM) = 0.328) with respect to calcium oxalate monohydrate (COM, CaC(2)O(4)center dot H(2)O). The brushite dissolution provides calcium ions that raise the COM supersaturation, which is heterogeneously nucleated either on or near the surface of the dissolving calcium phosphate crystals. The COM crystallites may then aggregate, simulating kidney stone formation. Interestingly, two intermediate phases, anhydrous dicalcium phosphate (monetite, CaHPO(4)) and calcium oxalate trihydrate (COT), are also detected by X-ray diffraction during this brushite-COM transformation. In support of clinical observations, the results of these studies demonstrate the participation of calcium phosphate phases in COM crystallization providing a possible physical chemical mechanism for kidney stone formation.
C1 [Guan, Xiangying; Wang, Lijun; Nancollas, George H.] SUNY Buffalo, Dept Chem, Buffalo, NY 14260 USA.
   [Guan, Xiangying] Drexel Univ, Coll Med, Dept Physiol & Pharmacol, Philadelphia, PA 19102 USA.
   [Dosen, Anja; Giese, Rossman F.] SUNY Buffalo, Dept Geol, Buffalo, NY 14260 USA.
   [Tang, Ruikang] Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China.
   [Giocondi, Jennifer L.; Orme, Christine A.] Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, Livermore, CA 94551 USA.
   [Hoyer, John R.] Univ Delaware, Dept Biol Sci, Newark, DE 19716 USA.
RP Nancollas, GH (reprint author), SUNY Buffalo, Dept Chem, Buffalo, NY 14260 USA.
EM ghn@buffalo.edu
RI Orme, Christine/A-4109-2009; GUAN, XIANGYING/F-4646-2010
FU NIDCR NIH HHS [R01 DE003223, R01 DE003223-36, DE03223, R37 DE003223]
NR 32
TC 11
Z9 12
U1 3
U2 18
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD JUL 15
PY 2008
VL 24
IS 14
BP 7058
EP 7060
DI 10.1021/la8007987
PG 3
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
   Multidisciplinary
SC Chemistry; Materials Science
GA 323SI
UT WOS:000257468300005
PM 18557638
ER

PT J
AU Wang, XQ
   Liang, CD
   Dai, S
AF Wang, Xiqing
   Liang, Chengdu
   Dai, Sheng
TI Facile synthesis of ordered mesoporous carbons with high thermal
   stability by self-assembly of resorcinol-formaldehyde and block
   copolymers under highly acidic conditions
SO LANGMUIR
LA English
DT Article
ID POLYMERS; TRANSFORMATION; NANOCOMPOSITE; FRAMEWORKS; TRIBLOCK
AB The effect of phenols reactivity with formaldehyde on the formation of ordered mesoporous carbons has been investigated. A strategy to accelerate the polymerization of phenolic resins by using strongly acidic conditions is proposed. The self-assembly of resorcinol-formaldehyde and block copolymers (e.g., F127) under highly acidic concentrations (e.g., 1.5 M HCl) is probably driven by the I(+)X(-)S(+) mechanism and hydrogen bonding and affords a highly reproducible approach for synthesis of ordered mesoporous carbons. The synthesis can be readily scaled up with no change in sample quality. The carbon material obtained (denoted as C-ORNL-1) exhibits highly ordered hexagonal mesostructure, with a typical BET surface area of similar to 600 m(2)/g, pore size of 6.3 nm, and pore volume of similar to 0.60 cm(3)/g. One of the unique structural features of C-ORNL-1 is its high thermal stability; it can be graphitized at 2600 degrees C while considerable mesoporosity is maintained.
C1 [Wang, Xiqing; Liang, Chengdu; Dai, Sheng] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Dai, S (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM dais@ornl.gov
RI Wang, Xiqing/E-3062-2010; Liang, Chengdu/G-5685-2013; Dai,
   Sheng/K-8411-2015
OI Wang, Xiqing/0000-0002-1843-008X; Dai, Sheng/0000-0002-8046-3931
NR 29
TC 199
Z9 204
U1 14
U2 174
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD JUL 15
PY 2008
VL 24
IS 14
BP 7500
EP 7505
DI 10.1021/la800529v
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
   Multidisciplinary
SC Chemistry; Materials Science
GA 323SI
UT WOS:000257468300063
PM 18547076
ER

PT J
AU Zhao, WJ
   Norman, A
   Phok, S
   Bhattacharya, R
AF Zhao, Wenjun
   Norman, Andrew
   Phok, Sovannary
   Bhattacharya, Raghu
TI Transmission electron microscope study on electrodeposited Gd2O3 and
   Gd2Zr2O7 buffer layers for YBa2Cu3O7-delta superconductors
SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
LA English
DT Article
DE electrodeposition; YBCO; TEM; coated conductor; Gd2Zr2O7; Gd2O3
ID YBCO-COATED CONDUCTORS; FILMS; PERFORMANCE; DEPOSITION; TAPES
AB We have investigated the microstructures of electrodeposited Gd2O3 (GO) and Gd2Zr2O7 (GZO) buffer layers for YBa2Cu3O7-delta (YBCO) superconductors with conventional transmission electron microscopy (TEM). A high density of nanoscale voids was present in the GZO buffer layers. No voids were observed in Go buffer layers grown on GZO. YBCO superconductor grown on the GO/GZO buffer layer structure produced a critical current density (J(c)) of 3.3 x 10(6) A/c m(2) at 77 K in zero field. (c) 2008 Published by Elsevier B.V.
C1 [Zhao, Wenjun; Norman, Andrew; Phok, Sovannary; Bhattacharya, Raghu] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Zhao, WJ (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd,W100-15,Mailstop 3213, Golden, CO 80401 USA.
EM wenjun_zhao@nrel.gov
RI Norman, Andrew/F-1859-2010
OI Norman, Andrew/0000-0001-6368-521X
FU Midwest Research Institute [DE-AC36-99GO10337]; US Department of Energy
   [DEAC36-99-GO10337]
FX This work has been authored by an employee of the Midwest Research
   Institute under Contract No. DE-AC36-99GO10337 with the US Department of
   Energy. The United States Government retains, and the publisher, by
   accepting the article for publication, acknowledges that the United
   States Government retains, a nonexclusive, paid-up, irrevocable,
   worldwide license to publish or reproduce the published form of this
   work, or allow others to do so, for United States Government purpose.
   This work was supported by the US Department of Energy under Contract
   No. DEAC36-99-GO10337.
NR 14
TC 11
Z9 11
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0921-4534
J9 PHYSICA C
JI Physica C
PD JUL 15
PY 2008
VL 468
IS 14
BP 1092
EP 1096
DI 10.1016/j.physc.2008.05.282
PG 5
WC Physics, Applied
SC Physics
GA 342XR
UT WOS:000258817400017
ER

PT J
AU Wu, JZ
   Prausnitz, JM
AF Wu, Jianzhong
   Prausnitz, John M.
TI Pairwise-additive hydrophobic effect for alkanes in water
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
   AMERICA
LA English
DT Article
DE thermodynamics; hydrophobicity; multibody potential; hydrogen-bonding
   network
ID LIQUID WATER; MEAN FORCE; METHANE; SIMULATION; SOLVATION; HYDRATION;
   SOLUTES; ENTROPY
AB Pairwise additivity of the hydrophobic effect is indicated by reliable experimental Henry's constants for a large number of linear and branched low-molecular-weight alkanes in water. Pairwise additivity suggests that the hydrophobic effect is primarily a local phenomenon and that the hydrophobic interaction may be represented by a semiempirical force field. By representing the hydrophobic potential between two methane molecules as a linear function of the overlap volume of the hydration layers, we find that the contact value of the hydrophobic potential (-0.72 kcal/mol) is smaller than that from quantum mechanics simulations (-2.8 kcal/mol) but is close to that from classical molecular dynamics (-0.5 similar to-0.9 kcal/mol).
C1 [Wu, Jianzhong] Univ Calif Riverside, Dept Chem & Environm Engn, Riverside, CA 92521 USA.
   [Prausnitz, John M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
   [Prausnitz, John M.] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
RP Wu, JZ (reprint author), Univ Calif Riverside, Dept Chem & Environm Engn, Riverside, CA 92521 USA.
EM jwu@engr.ucr.edu; prausnit@cchem.berkeley.edu
RI Wu, Jianzhong/I-5164-2013; 
OI Wu, Jianzhong/0000-0002-4582-5941
NR 26
TC 29
Z9 29
U1 0
U2 24
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD JUL 15
PY 2008
VL 105
IS 28
BP 9512
EP 9515
DI 10.1073/pnas.0802162105
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 328FV
UT WOS:000257784700013
PM 18599448
ER

PT J
AU Pfeiffer, BD
   Jenett, A
   Hammonds, AS
   Ngo, TTB
   Misra, S
   Murphy, C
   Scully, A
   Carlson, JW
   Wan, KH
   Laverty, TR
   Mungall, C
   Svirskas, R
   Kadonaga, JT
   Doe, CQ
   Eisen, MB
   Celniker, SE
   Rubin, GM
AF Pfeiffer, Barret D.
   Jenett, Arnim
   Hammonds, Ann S.
   Ngo, Teri-T B.
   Misra, Sima
   Murphy, Christine
   Scully, Audra
   Carlson, Joseph W.
   Wan, Kenneth H.
   Laverty, Todd R.
   Mungall, Chris
   Svirskas, Rob
   Kadonaga, James T.
   Doe, Chris Q.
   Eisen, Michael B.
   Celniker, Susan E.
   Rubin, Gerald M.
TI Tools for neuroanatomy and neurogenetics in Drosophila
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
   AMERICA
LA English
DT Article
DE enhancer; gene expression; promoter; transcription; transgenic
ID NEURONAL MORPHOGENESIS; CORE PROMOTER; GAL4 SYSTEM; EXPRESSION; ELEMENTS
AB We demonstrate the feasibility of generating thousands of transgenic Drosophila melanogaster lines in which the expression of an exogenous gene is reproducibly directed to distinct small subsets of cells in the adult brain. We expect the expression patterns produced by the collection of 5,000 lines that we are currently generating to encompass all neurons in the brain in a variety of intersecting patterns. Overlapping 3-kb DNA fragments from the flanking noncoding and intronic regions of genes thought to have patterned expression in the adult brain were inserted into a defined genomic location by site-specific recombination. These fragments were then assayed for their ability to function as transcriptional enhancers in conjunction with a synthetic core promoter designed to work with a wide variety of enhancer types. An analysis of 44 fragments from four genes found that > 80% drive expression patterns in the brain; the observed patterns were, on average, comprised of < 100 cells. Our results suggest that the D. melanogaster genome contains > 50,000 enhancers and that multiple enhancers drive distinct subsets of expression of a gene in each tissue and developmental stage. We expect that these lines will be valuable tools for neuroanatomy as well as for the elucidation of neuronal circuits and information flow in the fly brain.
C1 [Pfeiffer, Barret D.; Jenett, Arnim; Ngo, Teri-T B.; Murphy, Christine; Laverty, Todd R.; Svirskas, Rob; Rubin, Gerald M.] Howard Hughes Med Inst, Ashburn, VA 20147 USA.
   [Hammonds, Ann S.; Carlson, Joseph W.; Wan, Kenneth H.; Celniker, Susan E.] Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Genome & Computat Biol, Div Life Sci, Berkeley, CA 94720 USA.
   [Eisen, Michael B.] Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Genome Sci, Genom Div, Berkeley, CA 94720 USA.
   [Hammonds, Ann S.; Misra, Sima; Eisen, Michael B.] Univ Calif Berkeley, Dept Mol & Cellular Biol, Berkeley, CA 94720 USA.
   [Scully, Audra; Mungall, Chris; Rubin, Gerald M.] Univ Calif Berkeley, Howard Hughes Med Inst, Berkeley, CA 94720 USA.
   [Kadonaga, James T.] Univ Calif San Diego, Mol Biol Sect, La Jolla, CA 92093 USA.
   [Doe, Chris Q.] Univ Oregon, Howard Hughes Med Inst, Inst Neurosic & Mol Biol, Eugene, OR 97403 USA.
RP Rubin, GM (reprint author), Howard Hughes Med Inst, Janelia Farm Res Campus, Ashburn, VA 20147 USA.
EM rubing@janelia.hhmi.org
OI Eisen, Michael/0000-0002-7528-738X; Rubin, Gerald/0000-0001-8762-8703;
   Jenett, Arnim/0000-0003-3039-2060
FU Howard Hughes Medical Institute; NHGRI NIH HHS [R01 HG002779-06]; NIGMS
   NIH HHS [GM041249, GM076655-01A1, R01 GM041249, R01 GM041249-18, R01
   GM041249-19, R01 GM041249-19S1, R01 GM041249-20, R01 GM076655]
NR 18
TC 325
Z9 324
U1 2
U2 31
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD JUL 15
PY 2008
VL 105
IS 28
BP 9715
EP 9720
DI 10.1073/pnas.0803697105
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 328FV
UT WOS:000257784700048
PM 18621688
ER

PT J
AU Szili, EJ
   Kumar, S
   Smart, RSC
   Lowe, R
   Saiz, E
   Voelcker, NH
AF Szili, Endre J.
   Kumar, Sunil
   Smart, Roger St. C.
   Lowe, Rachel
   Saiz, Eduardo
   Voelcker, Nicolas H.
TI Plasma enhanced chemical vapour deposition of silica onto titanium:
   Analysis of surface chemistry, morphology and hydroxylation
SO SURFACE SCIENCE
LA English
DT Article
DE biomaterial; hydroxyl groups; plasma enhanced chemical vapour;
   deposition; silica films; titanium
ID SIMULATED BODY-FLUID; GLASS; IMMOBILIZATION; SILANE; GROWTH
AB We have been developing and characterising a procedure for the deposition of thin silica films by a plasma enhanced chemical vapour deposition (PECVD) procedure using tetraethoxysilane (TEOS) as the main precursor. The silica coatings were used for improving the corrosion resistance of metals and as bioactive coatings on biomedical metallic implants. We have improved the PECVD method for producing high quality and reproducible PECVD-silica (PECVD-SiO2) coatings on metals, primarily for biomaterial applications. In order to understand the interaction of the PECVD-SiO2 coatings with biological species (such as proteins and cells), it is important to first analyse the properties of the silica films deposited using the optimised parameters. Therefore, the work presented and discussed in this paper was carried out to analyse the characteristic features of PECVD-SiO2 deposited on titanium (Ti) substrates (PECVDSiO2-Ti). We determined that the PECVD-SiO2 Coatings on Ti were conformal to the substrate surface, strongly adhered to the underlying substrate and were resistant to delamination. The PECVD-SiO2 surface was composed of stoichiometric SiO2, showed a low carbon content (below 10 at.%) and was very hydrophilic (contact angle <10 degrees). Finally, we also showed that the PECVD-Si coatings contain surface hydroxyl groups. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Kumar, Sunil] Univ S Australia, Ian Wark Res Inst, Mawson Lakes, SA 5095, Australia.
   [Szili, Endre J.; Lowe, Rachel; Voelcker, Nicolas H.] Flinders Univ S Australia, Sch Chem Phys & Earth Sci, Bedford Pk, SA 5042, Australia.
   [Smart, Roger St. C.] Univ S Australia, Appl Ctr Struct & Synchrotron Studies, Mawson Lakes, SA 5095, Australia.
   [Saiz, Eduardo] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Kumar, S (reprint author), Univ S Australia, Ian Wark Res Inst, Mawson Lakes, SA 5095, Australia.
EM sunil.kumar@unisa.edu.au; nico.voelcker@flinders.edu.au
RI Voelcker, Nicolas/D-6199-2012; Smart, Roger/D-1786-2009
OI Voelcker, Nicolas/0000-0002-1536-7804; 
FU NIH/NIDCR [1R01 DE11289]; TGR BioSciences Pty Ltd; Australian Research
   Council
FX This work was supported by TGR BioSciences Pty Ltd and the Australian
   Research Council. Eduardo Saiz acknowledges the support from NIH/NIDCR
   Grant No. 1R01 DE11289.
NR 25
TC 10
Z9 10
U1 2
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD JUL 15
PY 2008
VL 602
IS 14
BP 2402
EP 2411
DI 10.1016/j.susc.2008.05.027
PG 10
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 346IN
UT WOS:000259062200018
PM 19809536
ER

PT J
AU Smerdon, JA
   Leung, L
   Parle, JK
   Jenks, CJ
   McGrath, R
   Fournee, V
   Ledieu, J
AF Smerdon, J. A.
   Leung, L.
   Parle, J. K.
   Jenks, C. J.
   McGrath, R.
   Fournee, V.
   Ledieu, J.
TI Formation of a quasicrystalline Pb monolayer on the 10-fold surface of
   the decagonal Al-Ni-Co quasicrystal
SO SURFACE SCIENCE
LA English
DT Article
DE STM; LEED; epitaxy; quasicrystal; lead
ID FIVEFOLD SURFACE; GROWTH; ATOMS; FILMS
AB Lead has been deposited on the 10-fold surface of decagonal Al72Ni11Co17 at room temperature to form an epitaxial quasicrystalline single-element monolayer. The overlayer grows through nucleation of nanometer-sized irregular-shaped islands and the coverage saturates at 1 MLE. The overlayer is well-ordered quasiperiodically as evidenced by LEED and Fourier transforms of STM images. LEED measurements also indicate that annealing the film to 600 K improves the structural quality, but STM shows that this causes the film to develop pores. Adsorption of C-60 molecules on this surface showed that the pores are Pb-containing. Electronic structure measurements using X-ray photoemission spectroscopy indicate that the chemical interaction of the Pb atoms with the substrate is weak, and that Pb does not desorb from the surface upon annealing. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Smerdon, J. A.; Leung, L.; Parle, J. K.; McGrath, R.] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England.
   [Smerdon, J. A.; Leung, L.; Parle, J. K.; McGrath, R.] Univ Liverpool, Surface Sci Res Ctr, Liverpool L69 3BX, Merseyside, England.
   [Jenks, C. J.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
   [Fournee, V.; Ledieu, J.] Ecole Mines, LSGM2, CNRS, UMR 7584, F-54042 Nancy, France.
RP McGrath, R (reprint author), Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England.
EM mcgrath@liv.ac.uk
RI McGrath, Ronan/A-1568-2009; Ledieu, Julian/F-1430-2010
OI McGrath, Ronan/0000-0002-9880-5741; 
FU UK Engineering and Physical Sciences Research Council [EP/D05253X/1];
   European Union Network of Excellence [NMP3-CT-2005-500145]
FX The UK Engineering and Physical Sciences Research Council (Grant No.
   EP/D05253X/1) and the European Union Network of Excellence "Complex
   metallic alloys" Grant No. NMP3-CT-2005-500145 are thanked for financial
   support. Ian Fisher (Stanford University) is thanked for his help in
   growing the sample. We are grateful to Jim Evans (Ames Laboratory) for
   helpful discussions.
NR 38
TC 16
Z9 16
U1 2
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD JUL 15
PY 2008
VL 602
IS 14
BP 2496
EP 2501
DI 10.1016/j.susc.2008.05.029
PG 6
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 346IN
UT WOS:000259062200031
ER

PT J
AU Han, Y
   Evans, JW
   Liu, DJ
AF Han, Yong
   Evans, J. W.
   Liu, Da-Jiang
TI Quantum stabilities and growth modes of thin metal films: Unsupported
   and NiAl-supported Ag(110) and Ag(100)
SO SURFACE SCIENCE
LA English
DT Article
DE metal films; Ag films; NiAl; quantum size effect; surface energy;
   epitaxial growth; density functional theory; free-electron model
ID SI(111)-(7X7) SURFACES; ELECTRON-DENSITY; AG ISLANDS; PB; ENERGY;
   OSCILLATIONS; HEIGHT; ALLOYS; AU
AB We present density functional theory (DFT) analyses of the stability of Ag thin films versus film thicknesses for various surface orientations. We include benchmark results for freestanding films, but consider in detail Ag(1 1 0) films supported on a NiAl(1 1 0) substrate, and Ag(1 0 0) films supported on a NiAl(1 0 0) substrate. The supported films exhibit an almost perfect lattice-match between film and substrate surface unit cells, so one can assess film stability in the absence of significant lateral mismatch strain. We also provide a characterization of film growth modes for these NiAl-supported Ag films based on DFT results for the relevant energetics. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Han, Yong] Iowa State Univ, Inst Phys Res & Technol, Ames, IA 50011 USA.
   [Evans, J. W.] Iowa State Univ, Dept Math, Ames, IA 50011 USA.
   [Evans, J. W.; Liu, Da-Jiang] Iowa State Univ, Ames Lab, USDOE, Ames, IA 50011 USA.
RP Han, Y (reprint author), Iowa State Univ, Inst Phys Res & Technol, Ames, IA 50011 USA.
EM octavian2009@gmail.com
RI Han, Yong/F-5701-2012
OI Han, Yong/0000-0001-5404-0911
NR 54
TC 11
Z9 11
U1 2
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD JUL 15
PY 2008
VL 602
IS 14
BP 2532
EP 2540
DI 10.1016/j.susc.2008.05.040
PG 9
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 346IN
UT WOS:000259062200036
ER

PT J
AU Demchenko, DO
   Sacha, GM
   Salmeron, M
   Wang, LW
AF Demchenko, D. O.
   Sacha, G. M.
   Salmeron, M.
   Wang, L. -W.
TI Interactions of oxygen and hydrogen on Pd(111) surface
SO SURFACE SCIENCE
LA English
DT Article
DE oxygen; hydrogen; palladium; density functional theory; ab initio
   calculations; scanning tunneling microscopy
ID ORDER-DISORDER TRANSITIONS; SUBSURFACE OCCUPATION; WATER FORMATION;
   ADSORPTION; CHEMISORPTION; OVERLAYERS; OXIDATION; KINETICS; PT(111); GAS
AB The coadsorption and interactions of oxygen and hydrogen on Pd(1 1 1) was studied by scanning tunneling microscopy and density functional theory calculations. In the absence of hydrogen oxygen forms a (2 x 2) ordered structure. Coadsorption of hydrogen leads to a structural transformation from (2 x 2) to a (root 3 x root 3)R30 degrees structure. In addition to this transformation, hydrogen enhances the mobility of oxygen. To explain these observations, the interaction of oxygen and hydrogen on Pd(111) was studied within the density functional theory. In agreement with the experiment the calculations find a total energy minimum for the oxygen (2 x 2) structure. The interaction between H and O atoms was found to be repulsive and short ranged, leading to a compression of the O islands from (2 x 2) to (root 3 x root 3)R30 degrees ordered structure at high H coverage. The computed energy barriers for the oxygen diffusion were found to be reduced due to the coadsorption of hydrogen, in agreement with the experimentally observed enhancement of oxygen mobility. The calculations also support the finding that at low temperatures the water formation reaction does not occur on Pd(1 1 1). 2008 Elsevier B.V. All rights reserved.
C1 [Sacha, G. M.; Salmeron, M.] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   [Demchenko, D. O.; Wang, L. -W.] Lawrence Berkeley Natl Lab, Computat Res Div, Berkeley, CA 94720 USA.
RP Salmeron, M (reprint author), Lawrence Berkeley Natl Lab, Div Mat Sci, 1 Cyclotron Rd,MS 67-2206, Berkeley, CA 94720 USA.
EM mbsalmeron@lbl.gov
RI Gomez Monivas, Sacha/H-5611-2011
OI Gomez Monivas, Sacha/0000-0003-2280-5021
FU U.S. Department of Energy [DE-AC02-05CH11231]; National Energy Research
   Scientific Computing Center (NERSC)
FX This work was supported by the Director, Office of Science, Office of
   Basic Energy Sciences, Materials Sciences and Engineering Division of
   the U.S. Department of Energy under Contract No. DE-AC02-05CH11231, and
   by the National Energy Research Scientific Computing Center (NERSC).
NR 34
TC 8
Z9 8
U1 2
U2 30
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD JUL 15
PY 2008
VL 602
IS 14
BP 2552
EP 2557
DI 10.1016/j.susc.2008.06.004
PG 6
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 346IN
UT WOS:000259062200039
ER

PT J
AU Nikitin, A
   Naslund, LA
   Zhang, ZY
   Nilsson, A
AF Nikitin, Anton
   Naeslund, Lars-Ake
   Zhang, Zhiyong
   Nilsson, Anders
TI C-H bond formation at the graphite surface studied with core level
   spectroscopy
SO SURFACE SCIENCE
LA English
DT Article
DE graphite; hydrogenation; core level spectroscopy; hydrogen storage
ID ATOMIC-HYDROGEN; CARBON NANOTUBES; ABSORPTION; ADSORPTION; STORAGE;
   METALS; PLANE
AB We studied the formation of C-H bonds at the surface of graphite under atomic hydrogen treatment using X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS). We found that the amount of hydrogenation of the graphite surface at saturation coverage measured by C1s XPS coincides with the amount of hydrogen measured by temperature programmed desorption. This directly indicates that C1s XPS measurements provide reliable information about the amount of hydrogen stored in carboneous materials through the formation of C-H bonds. From angle resolved XAS measurements we found that the C-H bonds are not perpendicular to the surface of the graphite and that the hydrogenated carbon atoms are buckled up from the highly oriented pyrolitic graphite surface. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Nilsson, Anders] Univ Stockholm, FYSIKUM, S-10691 Stockholm, Sweden.
   [Nikitin, Anton; Naeslund, Lars-Ake; Nilsson, Anders] Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA.
   [Zhang, Zhiyong] Stanford Univ, Dept Chem Engn, Stanford, CA 94305 USA.
RP Nilsson, A (reprint author), Univ Stockholm, FYSIKUM, S-10691 Stockholm, Sweden.
EM nilsson@slac.stanford.edu
RI Nilsson, Anders/E-1943-2011
OI Nilsson, Anders/0000-0003-1968-8696
FU Stanford University; US Department of Energy, Office of Basic Energy
   Sciences
FX This work was supported by the Global Climate and Energy Project
   operated by Stanford University and carried out at the Stanford
   Synchrotron Radiation Laboratory, a national user facility operated by
   Stanford University on behalf of the US Department of Energy, Office of
   Basic Energy Sciences.
NR 29
TC 59
Z9 59
U1 2
U2 26
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD JUL 15
PY 2008
VL 602
IS 14
BP 2575
EP 2580
DI 10.1016/j.susc.2008.06.012
PG 6
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 346IN
UT WOS:000259062200042
ER

PT J
AU Carreira, RJ
   Rial-Otero, R
   Lopez-Ferrer, D
   Lodeiro, C
   Capelo, JL
AF Carreira, R. J.
   Rial-Otero, R.
   Lopez-Ferrer, D.
   Lodeiro, C.
   Capelo, J. L.
TI Ultrasonic energy as a new tool for fast isotopic O-18 labeling of
   proteins for mass spectrometry-based techniques: Preliminary results
SO TALANTA
LA English
DT Article
DE isotopic labeling; O-18; ultrasonic bath; protein quantitation
ID QUANTITATIVE PROTEOMICS; STRATEGIES; DIGESTION; CHEMISTRY
AB Preliminary results regarding fast isotopic labeling of proteins with O-18 in conjunction with matrix assisted laser desorption ionization time of flight mass spectrometry technique are presented. Similar O-16/O-18 isotopic labeling ratios were found for the overnight procedure (12 h) and the new fast ultrasonic one (30 min) for the BSA, ovalbumin and alpha-lactalbumin proteins. The procedure, however, failed to promote double O-18 isotopic labeling for the proteins, ovalbumin and alpha-lactalbumin. Two different sonication frequencies, 35 and 130 kHz, were studied at two different sonication times of 15 and 30 min, being best results obtained with the procedure at 130 kHz of sonication frequency and 30 min of sonication time. For comparative purposes the overnight isotopic O-18 labeling procedure was done. In addition, the new fast isotopic labeling procedure was also studied without ultrasonication, in a water bath at 60 degrees C. (C) 2008 Published by Elsevier B.V.
C1 [Carreira, R. J.; Rial-Otero, R.; Lodeiro, C.; Capelo, J. L.] Univ Nova Lisboa, Fac Ciencias & Tecnol, REQUIMTE, Dept Quim, P-2829516 Monte De Caparica, Portugal.
   [Lopez-Ferrer, D.] Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA.
RP Capelo, JL (reprint author), Univ Nova Lisboa, Fac Ciencias & Tecnol, REQUIMTE, Dept Quim, P-2829516 Monte De Caparica, Portugal.
EM jlcapelom@dq.fct.unl.pt
RI Carreira, Ricardo/D-1089-2011; Rial, Raquel/A-6040-2012; Lodeiro,
   Carlos/B-4793-2013; Capelo, Jose Luis/C-7334-2013; Caparica,
   cqfb_staff/H-2611-2013; REQUIMTE, AL/H-9106-2013; Chaves,
   Pedro/K-1288-2013; REQUIMTE, C4O/M-5599-2013; REQUIMTE,
   UCIBIO/N-9846-2013; 
OI Lodeiro, Carlos/0000-0001-5582-5446; Rial, Raquel/0000-0001-9364-1170;
   Capelo Martinez, Jose Luis/0000-0001-6276-8507
NR 20
TC 20
Z9 20
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-9140
J9 TALANTA
JI Talanta
PD JUL 15
PY 2008
VL 76
IS 2
BP 400
EP 406
DI 10.1016/j.talanta.2008.03.013
PG 7
WC Chemistry, Analytical
SC Chemistry
GA 321CX
UT WOS:000257283100028
PM 18585297
ER

PT J
AU Sharma, P
   Flury, M
   Mattson, ED
AF Sharma, Prabhakar
   Flury, Markus
   Mattson, Earl D.
TI Studying colloid transport in porous media using a geocentrifuge
SO WATER RESOURCES RESEARCH
LA English
DT Article
ID NONAQUEOUS PHASE LIQUID; FILTRATION THEORY; BED FILTRATION; FLOW;
   DEPOSITION; CENTRIFUGATION; FLUID; WATER; FIELD; SEDIMENTATION
AB Movement of colloids in the subsurface is a concern because mobile colloids may enhance the transport of contaminants. The excessive time required to conduct flow and transport experiments in porous media led to the use of centrifuges to evaluate subsurface transport processes. The objective of this study was to determine the suitability of centrifuges to study colloid transport in saturated porous media. We used a geocentrifuge to run colloid transport experiments under different centrifugal accelerations up to 20 g. Colloids of different densities were used: polystyrene (1.05 g/cm(3)), silica (2 g/cm(3)), and hematite (5.26 g/cm(3)). Deposition coefficients were obtained from the colloid breakthrough curves. We used filtration theory and a theory based on sedimentation-diffusion to derive functional relationships between centrifugal acceleration and colloid and porous media properties, which allow us to predict the effect of acceleration on colloid transport. Comparison of experimental deposition coefficients with predictions based on filtration theory showed that filtration theory accurately predicted the behavior of polystyrene at higher accelerations but underpredicted colloid deposition for silica and hematite at accelerations higher than similar to 10 g. The sedimentation-diffusion theory allows us to determine whether a system is dominated by sedimentation or diffusion, or is in a transitional state. Theoretical predictions of colloid deposition in a porous medium agreed well with experiments, suggesting that the theory can be used to delineate when centrifugal acceleration will alter colloid transport in flow through column studies conducted in a centrifuge. Common subsurface colloids, such as iron oxides and aluminosilicates, can be affected at accelerations that are used in geocentrifuge transport studies (5 to 300 g). Even colloids with low specific densities, such as polystyrene, will be affected by centrifugal accelerations if their size is large.
C1 [Mattson, Earl D.] Idaho Natl Lab, Energy Resource Recovery & Management Dept, Idaho Falls, ID 83415 USA.
   [Sharma, Prabhakar; Flury, Markus] Washington State Univ, Dept Crop & Soil Sci, Ctr Multiphase Environm Res, Pullman, WA 99164 USA.
   [Sharma, Prabhakar; Flury, Markus] Washington State Univ, Dept Biol Syst Engn, Ctr Multiphase Environm Res, Pullman, WA 99164 USA.
RP Sharma, P (reprint author), Univ Aalborg, Sect Environm Engn, Sohngaardsholmsvej 57, DK-9000 Aalborg, Denmark.
EM ps@bio.aau.dk; flury@wsu.edu
RI Sharma, Prabhakar/C-2133-2009; Flury, Markus/H-2983-2012; 
OI Sharma, Prabhakar/0000-0003-0894-0809; Flury,
   Markus/0000-0002-3344-3962; Mattson, Earl/0000-0002-2616-0008
NR 47
TC 5
Z9 5
U1 3
U2 16
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0043-1397
J9 WATER RESOUR RES
JI Water Resour. Res.
PD JUL 15
PY 2008
VL 44
IS 7
AR W07407
DI 10.1029/2007WR006456
PG 11
WC Environmental Sciences; Limnology; Water Resources
SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water
   Resources
GA 328MW
UT WOS:000257803500001
ER

PT J
AU Yantasee, W
   Charnhattakorn, B
   Fryxell, GE
   Lin, YH
   Timchalk, C
   Addleman, RS
AF Yantasee, Wassana
   Charnhattakorn, Busarakum
   Fryxell, Glen E.
   Lin, Yuehe
   Timchalk, Charles
   Addleman, R. Shane
TI Detection of Cd, Pb, and Cu in non-pretreated natural waters and urine
   with thiol functionalized mesoporous silica and Nafion composite
   electrodes
SO ANALYTICA CHIMICA ACTA
LA English
DT Article
DE electrochemical sensor; self-assembled monolayers on mesoporous
   supports; Nafion; thiol; Cd; Pb; Cu; urine; natural water
ID ANODIC-STRIPPING VOLTAMMETRY; SELF-ASSEMBLED MONOLAYERS; CARBON-PASTE
   ELECTRODE; SILVER ELECTRODE; HEAVY-METALS; NANOMOLAR CONCENTRATIONS;
   ACTINIDE SEQUESTRATION; LEAD PB; SUPPORTS; SYSTEM
AB Electrochemical sensors have great potential for environmental monitoring of toxic metal ions in waters due to their portability; field-deployability and excellent detection limits. However, electrochemical sensors employing mercury-free approaches typically suffer from binding competition for metal ions and fouling by organic substances and surfactants in natural waters, making sample pretreatments such as wet ashing necessary. In this work, we have developed mercury-free sensors by coating a composite of thiol self-assembled monolayers on mesoporous supports (SH-SAMMS (TM)) and Nafion on glassy-carbon electrodes. With the combined benefit of SH-SAMMS (TM) as an outstanding metal preconcentrator and Nafion as an antifouling binder, the sensors could detect 0.5 ppb of Pb and 2.5 ppb of Cd in river water, Hanford groundwater, and seawater with a minimal amount of preconcentration time (few minutes) and without any sample pretreatment. The sensor could also detect 2.5 ppb of Cd, Pb, and Cu simultaneously. The electrodes have long service times and excellent single and inter-electrode reproducibility (5% R.S.D. after 8 consecutive measurements). Unlike SAMMS (TM)-carbon paste electrodes, the SAMMS (TM)-Nafion electrodes were not fouled in samples containing albumin and successfully detected Cd in human urine. Other potentially confounding factors affecting metal detection at SAMMS (TM)-Nafion electrodes were studied, including pH effect, transport resistance of metal ions, and detection interference. With the ability to reliably detect low metal concentration ranges without sample pretreatment and fouling, SAMMS (TM)-Nafion composite sensors have the potential to become the next-generation metal analyzers for environmental and bio-monitoring of toxic metals. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Yantasee, Wassana; Charnhattakorn, Busarakum; Fryxell, Glen E.; Lin, Yuehe; Timchalk, Charles; Addleman, R. Shane] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Yantasee, W (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM wassana.yantasee@pnl.gov
RI Lin, Yuehe/D-9762-2011
OI Lin, Yuehe/0000-0003-3791-7587
FU NIEHS NIH HHS [1R21ES015620-01A1, R21 ES015620, R21 ES015620-01A1];
   NIOSH CDC HHS [5R21OH008900-02, R21 OH008900]
NR 45
TC 63
Z9 63
U1 6
U2 85
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0003-2670
J9 ANAL CHIM ACTA
JI Anal. Chim. Acta
PD JUL 14
PY 2008
VL 620
IS 1-2
BP 55
EP 63
DI 10.1016/j.aca.2008.05.029
PG 9
WC Chemistry, Analytical
SC Chemistry
GA 324XR
UT WOS:000257553200007
PM 18558124
ER

PT J
AU Dolan, DH
   Ao, T
AF Dolan, D. H.
   Ao, T.
TI Cubic zirconia as a dynamic compression window
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID REFRACTIVE-INDEX; SHOCK COMPRESSION; SINGLE-CRYSTAL; YTTRIA
AB Symmetric impact experiments were used to characterize the elastic response of < 100 > cubic zirconia crystals under shock wave compression. Elastic response was determined from the apparent velocity structure upon free surface release and the preservation of light passing through the compressed sample. The Hugoniot and window correction were determined below 9 GPa, and the estimated elastic limit was found to be near 10 GPa. These results indicate that cubic zirconia may serve as a useful alternate to sapphire in dynamic compression experiments. (C) 2008 American Institute of Physics.
C1 [Dolan, D. H.; Ao, T.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Dolan, DH (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM dhdolan@sandia.gov
NR 17
TC 2
Z9 7
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 14
PY 2008
VL 93
IS 2
AR 021908
DI 10.1063/1.2957996
PG 3
WC Physics, Applied
SC Physics
GA 328KA
UT WOS:000257796100036
ER

PT J
AU Dwyer, C
   Erni, R
   Etheridge, J
AF Dwyer, Christian
   Erni, Rolf
   Etheridge, Joanne
TI Method to measure spatial coherence of subangstrom electron beams
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID STEM; DIFFRACTION
AB A method is described for measuring the intensity distribution of the electron source in a scanning transmission electron microscope (STEM) fitted with an objective lens aberration corrector. The method is applied to a C(s)-corrected 300 kV field emission gun TEM/STEM, which is found to have an effective source size of 0.56 angstrom full width at half maximum (FWHM) under optical conditions suitable for high resolution STEM imaging. This corresponds to a probe intensity distribution at the specimen plane of 0.72 angstrom FWHM using a probe-forming aperture of 25 mrad and including the measured residual lens aberrations. (C) 2008 American Institute of Physics.
C1 [Dwyer, Christian; Etheridge, Joanne] Monash Univ, Monash Ctr Elect Microscopy, Clayton, Vic 3800, Australia.
   [Dwyer, Christian] Monash Univ, Dept Mat Engn, Clayton, Vic 3800, Australia.
   [Erni, Rolf] Lawrence Berkeley Natl Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
RP Dwyer, C (reprint author), Monash Univ, Monash Ctr Elect Microscopy, Clayton, Vic 3800, Australia.
EM christian.dwyer@mcem.monash.edu.au
RI Dwyer, Christian/G-5678-2012; Erni, Rolf/P-7435-2014
OI Erni, Rolf/0000-0003-2391-5943
NR 14
TC 26
Z9 26
U1 1
U2 18
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 14
PY 2008
VL 93
IS 2
AR 021115
DI 10.1063/1.2957648
PG 3
WC Physics, Applied
SC Physics
GA 328KA
UT WOS:000257796100015
ER

PT J
AU Metzger, WK
   Repins, IL
   Contreras, MA
AF Metzger, Wyatt K.
   Repins, Ingrid L.
   Contreras, Miguel A.
TI Long lifetimes in high-efficiency Cu(In,Ga)Se(2) solar cells
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID TIME-RESOLVED PHOTOLUMINESCENCE; THIN-FILMS
AB Time-resolved photoluminescence measurements on polycrystalline Cu(In,Ga)Se(2) (CIGS) thin films corresponding to high-efficiency solar cells indicate recombination lifetimes as long as 250 ns, far exceeding previous measurements for this material. The lifetime decreases by two orders of magnitude when exposed to air. Charge separation effects can be observed on CIGS/CdS/ZnO devices in low-intensity conditions. The ZnO layer forms a robust junction critical for charge separation, whereas the CdS layer alone forms a much weaker junction. Recombination at the CIGS/CdS interface is negligible. The results significantly adjust the previous picture of recombination in CIGS solar cells. (C) 2008 American Institute of Physics.
C1 [Metzger, Wyatt K.; Repins, Ingrid L.; Contreras, Miguel A.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Metzger, WK (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM wyatt_metzger@nrel.gov
NR 16
TC 82
Z9 83
U1 3
U2 47
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 14
PY 2008
VL 93
IS 2
AR 022110
DI 10.1063/1.2957983
PG 3
WC Physics, Applied
SC Physics
GA 328KA
UT WOS:000257796100059
ER

PT J
AU Park, JW
   Baek, SH
   Kang, TD
   Lee, H
   Kang, YS
   Lee, TY
   Suh, DS
   Kim, KJ
   Kim, CK
   Khang, YH
   Da Silva, JLF
   Wei, SH
AF Park, Jun-Woo
   Baek, Seoung Ho
   Kang, Tae Dong
   Lee, Hosun
   Kang, Youn-Seon
   Lee, Tae-Yon
   Suh, Dong-Seok
   Kim, Ki Joon
   Kim, Cheol Kyu
   Khang, Yoon Ho
   Da Silva, Juarez L. F.
   Wei, Su-Huai
TI Optical properties of (GeTe, Sb2Te3) pseudobinary thin films studied
   with spectroscopic ellipsometry
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID PHASE-TRANSITIONS; GE2SB2TE5 FILMS
AB The authors measure the dielectric functions of (GeTe, Sb2Te3) pseudobinary thin films by using spectroscopic ellipsometry. By using standard critical point model, they obtained the optical transition (critical point) energies of the amorphous (crystalline) thin films. The optical (indirect band) gap energies of the amorphous (crystalline) phase are estimated from the linear extrapolation of the absorption coefficients. The band structure calculations show that GeTe, Ge2Sb2Te5, and Ge1Sb2Te4 have indirect gap whereas Ge1Sb4Te7 and Sb2Te3 have direct gap. The measured indirect band gap energies match well with electronic band structure calculations. (C) 2008 American Institute of Physics.
C1 [Park, Jun-Woo; Baek, Seoung Ho; Kang, Tae Dong; Lee, Hosun] Kyung Hee Univ, Dept Appl Phys, Suwon 446701, South Korea.
   [Kang, Youn-Seon; Lee, Tae-Yon; Suh, Dong-Seok; Kim, Ki Joon; Kim, Cheol Kyu; Khang, Yoon Ho] Samsung Adv Inst Technol, Semicond Device & Mat Lab, Suwon 440600, South Korea.
   [Da Silva, Juarez L. F.; Wei, Su-Huai] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Lee, H (reprint author), Kyung Hee Univ, Dept Appl Phys, Suwon 446701, South Korea.
EM hlee@khu.ac.kr
RI Suh, Dongseok/A-5447-2013; Da Silva, Juarez L. F./D-1779-2011; Park,
   Jun-Woo/N-5571-2015
OI Da Silva, Juarez L. F./0000-0003-0645-8760; 
NR 16
TC 22
Z9 22
U1 6
U2 16
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 14
PY 2008
VL 93
IS 2
AR 021914
DI 10.1063/1.2959818
PG 3
WC Physics, Applied
SC Physics
GA 328KA
UT WOS:000257796100042
ER

PT J
AU Zhong, J
   Chiou, JW
   Dong, CL
   Song, L
   Liu, C
   Xie, SS
   Cheng, HM
   Pong, WF
   Chang, CL
   Chen, YY
   Wu, ZY
   Guo, J
AF Zhong, Jun
   Chiou, Jauwern
   Dong, Chungli
   Song, Li
   Liu, Chang
   Xie, Sishen
   Cheng, Huiming
   Pong, Way-Faung
   Chang, Chinglin
   Chen, Yangyuan
   Wu, Ziyu
   Guo, Jinghua
TI Probing quantum confinement of single-walled carbon nanotubes by
   resonant soft-x-ray emission spectroscopy
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ELECTRONIC-STRUCTURE; SYNCHROTRON-RADIATION; ABSORPTION; GRAPHITE;
   FLUORESCENCE; SCATTERING
AB We report the band-structure changes near Fermi level for single-walled carbon nanotubes (SWNTs) with diameters down to 1 nm from the study of soft-x-ray absorption and resonant emission spectroscopy. The observed quantum confinement of SWNTs affects both pi and sigma bands and bandgap through the rehybridization of pi and sigma orbitals. The significant changes of electronic structure are proved to be a measure for the mean diameter of the macroscopic amounts of SWNTs. (C) 2008 American Institute of Physics.
C1 [Zhong, Jun; Wu, Ziyu] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
   [Zhong, Jun; Chiou, Jauwern; Dong, Chungli; Guo, Jinghua] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
   [Song, Li; Xie, Sishen] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China.
   [Dong, Chungli; Liu, Chang; Cheng, Huiming] Chinese Acad Sci, Inst Met Res, Shenyang 110015, Peoples R China.
   [Chiou, Jauwern; Pong, Way-Faung; Chang, Chinglin] Tamkang Univ, Dept Phys, Tamsui 251, Taiwan.
   [Chen, Yangyuan] Acad Sinica, Inst Phys, Taipei 115, Taiwan.
RP Wu, ZY (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
EM wuzy@mail.ihep.ac.cn; jguo@lbl.gov
RI Song, Li/B-1950-2010; Liu, Chang/G-4667-2012; 
OI Song, Li/0000-0003-0585-8519; Chang, Ching-Lin/0000-0001-8547-371X
NR 22
TC 6
Z9 7
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 14
PY 2008
VL 93
IS 2
AR 023107
DI 10.1063/1.2959058
PG 3
WC Physics, Applied
SC Physics
GA 328KA
UT WOS:000257796100084
ER

PT J
AU Konyk, M
   Kuzhel, B
   Stadnyk, Y
   Gorelenko, Y
   Mudryk, Y
   Waskiv, A
AF Konyk, M.
   Kuzhel, B.
   Stadnyk, Yu.
   Gorelenko, Yu.
   Mudryk, Ya.
   Waskiv, A.
TI Electric transport in R2MGe6 ternary compounds (R = La, Ce, Gd, Tb, Dy,
   Ho; M = Mn, Ni, Cu)
SO JOURNAL OF ALLOYS AND COMPOUNDS
LA English
DT Article
DE intermetallic compounds; germanides; rare earth compounds; electric
   conductivity; thermopower
ID RARE-EARTH; SYSTEMATICS; GE; ND
AB Polycrystalline samples of the intermetallic compounds La2MnGe6, Ce2MnGe6, La2CuGe6, Ce2CuGe6, and R2NiGe6 (R=Gd, Tb, Dy, flo), which belong to the Ce2CuGe6 type of structure (Amm2 or Cm2m space group), were studied by means of the electrical resistivity and differential thermopower measurements. They exhibit the metallic-like behavior in the temperature range from 5 to 290 K. The peculiarities in both resistivity and thermopower temperature dependencies correlate with corresponding magnetic transition T-tr temperatures. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Konyk, M.; Stadnyk, Yu.; Gorelenko, Yu.] Lviv Natl Univ, Dept Inorgan Chem, UA-79005 Lvov, Ukraine.
   [Kuzhel, B.] Lviv Natl Univ, Sci Tech & Educ Ctr Low Temp Studies, UA-79005 Lvov, Ukraine.
   [Kuzhel, B.; Waskiv, A.] Lviv Natl Univ, Dept Met Phys, UA-79005 Lvov, Ukraine.
   [Mudryk, Ya.] Iowa State Univ Sci & Technol, US DOE, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA.
RP Gorelenko, Y (reprint author), Lviv Natl Univ, Dept Inorgan Chem, Kyryl & Mephodiy St 6, UA-79005 Lvov, Ukraine.
EM gorelenko_yuriy@franko.lviv.ua
NR 11
TC 5
Z9 5
U1 1
U2 7
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-8388
J9 J ALLOY COMPD
JI J. Alloy. Compd.
PD JUL 14
PY 2008
VL 459
IS 1-2
BP 18
EP 21
DI 10.1016/j.jallcom.2007.04.286
PG 4
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
   Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA 317FV
UT WOS:000257006300010
ER

PT J
AU Liu, Y
   Liu, CT
   Heatherly, L
   George, EP
AF Liu, Y.
   Liu, C. T.
   Heatherly, L.
   George, E. P.
TI Effects of alloying elements on dendritic segregation in iridium alloys
SO JOURNAL OF ALLOYS AND COMPOUNDS
LA English
DT Article
DE high temperature alloys; composition fluctuations; grain boundaries;
   photoelectron spectroscopy
ID IR-RICH PORTION; MECHANICAL-PROPERTIES; GRAIN-BOUNDARIES;
   PHASE-EQUILIBRIA; TERNARY-SYSTEMS; W ALLOYS; THORIUM
AB The effects of alloying elements on dendritic segregation in Ir alloys were studied by Auger Electron Spectroscopy (AES). The addition of 10 at.% Nb induces significant segregation of carbon and thorium to dendritic interfaces. The addition of 5 at.% Zr to the Ir alloy leads to the formation of an Ir(3)Zr intermetallic phase, which results in less dendritic segregation of carbon and thorium. This dendritic segregation appears to be linked to the severe cracking observed in the Ir-Nb alloy, but not in the Ir-Zr alloy, after casting and heat treatment. The mechanism for the dendritic segregation was discussed by consideration of the solidification process and the change of carbon solubility in Ir by Zr addition. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Liu, Y.] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China.
   [Liu, Y.; Liu, C. T.; George, E. P.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
   [Liu, C. T.; Heatherly, L.; George, E. P.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Liu, Y (reprint author), Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China.
EM yonliu11@yahoo.com.cn
RI George, Easo/L-5434-2014
NR 21
TC 3
Z9 5
U1 0
U2 6
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-8388
J9 J ALLOY COMPD
JI J. Alloy. Compd.
PD JUL 14
PY 2008
VL 459
IS 1-2
BP 130
EP 134
DI 10.1016/j.jallcom.2007.04.252
PG 5
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
   Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA 317FV
UT WOS:000257006300031
ER

PT J
AU Dyer, PJ
   Docherty, H
   Cummings, PT
AF Dyer, Peter J.
   Docherty, Hugh
   Cummings, Peter T.
TI The importance of polarizability in the modeling of solubility:
   Quantifying the effect of solute polarizability on the solubility of
   small nonpolar solutes in popular models of water
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID TEMPERATURE-DEPENDENCE; HYDROPHOBIC HYDRATION; LIQUID WATER; WOLF
   METHOD; METHANE; SYSTEMS; SIMULATION
AB In recent work by Paschek [J. Chem. Phys. 120, 6674 (2004)] and others [see H. Docherty , J. Chem. Phys. 125, 074510 (2006) for a review] it has been suggested that, when coupled to a simple Lennard-Jones model for various small nonpolar solute molecules, the most common models of water (e.g., SPC/E and TIP4P) fail to reproduce quantitatively the solubility of small nonpolar solute molecules in water due in part to failing to account for polarization of the solute molecule. Given the importance of such systems as test-case prototype models of the solubility of proteins and biomolecules, in this work, we investigate the impact of using a polarizable solute model with the SPC/E, TIP3P, TIP4P, TIP4P-Ew, and TIP4P/2005 rigid water models. Specifically we consider Ne, Ar, Kr, Xe, and methane as solutes. In all cases we observe that the use of a polarizable solute improves agreement between experiment and simulations, with the best agreement seen for the largest solutes, Kr, CH(4), and Xe and the modern reparametrizations of the TIP4P model, i.e., the TIP4P-Ew and TIP4P/2005 models. (C) 2008 American Institute of Physics.
C1 [Dyer, Peter J.; Docherty, Hugh; Cummings, Peter T.] Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA.
   [Cummings, Peter T.] Oak Ridge Natl Lab, Nanomat Theory Inst, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Dyer, PJ (reprint author), Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA.
EM peter.j.dyer@vanderbilt.edu
RI Cummings, Peter/B-8762-2013
OI Cummings, Peter/0000-0002-9766-2216
NR 31
TC 30
Z9 30
U1 0
U2 22
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 JUL 14
PY 2008
VL 129
IS 2
AR 024508
DI 10.1063/1.2953324
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 326AA
UT WOS:000257629100031
PM 18624539
ER

PT J
AU Larue, JL
   White, JD
   Nahler, NH
   Liu, Z
   Sun, Y
   Pianetta, PA
   Auerbach, DJ
   Wodtke, AM
AF LaRue, J. L.
   White, J. D.
   Nahler, N. H.
   Liu, Z.
   Sun, Y.
   Pianetta, P. A.
   Auerbach, D. J.
   Wodtke, A. M.
TI The work function of submonolayer cesium-covered gold: A photoelectron
   spectroscopy study
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID ALKALI-METAL ADSORPTION; NA/AU(111) SYSTEM; ALLOY FORMATION; CS
   ADSORPTION; SURFACE; PHOTOEMISSION; EMISSION; DEPENDENCE; MOLECULES;
   DYNAMICS
AB Using visible and x-ray photoelectron spectroscopy, we measured the work function of a Au(111) surface at a well-defined submonolayer coverage of Cs. For a Cs coverage producing a photoemission maximum with a He-Ne laser, the work function is 1.61 +/- 0.08 eV, consistent with previous assumptions used to analyze vibrationally promoted electron emission. A discussion of possible Cs layer structures is also presented. (C) 2008 American Institute of Physics.
C1 [LaRue, J. L.; White, J. D.; Nahler, N. H.; Wodtke, A. M.] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA.
   [Liu, Z.; Sun, Y.; Pianetta, P. A.] Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA.
RP Larue, JL (reprint author), Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA.
EM wodtke@chem.ucsb.edu
RI Nahler, N Hendrik/H-9223-2012; Wodtke, Alec/I-4848-2012; Liu,
   Zhi/B-3642-2009; Auerbach, Daniel/J-7109-2014; 
OI Liu, Zhi/0000-0002-8973-6561; Auerbach, Daniel/0000-0001-9494-3066;
   Wodtke, Alec/0000-0002-6509-2183
NR 35
TC 18
Z9 18
U1 2
U2 17
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 JUL 14
PY 2008
VL 129
IS 2
AR 024709
DI 10.1063/1.2953712
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 326AA
UT WOS:000257629100046
PM 18624554
ER

PT J
AU Lee, B
   Lee, GW
AF Lee, Byeongchan
   Lee, Geun Woo
TI Local structure of liquid Ti: Ab initio molecular dynamics study
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID SHORT-RANGE ORDER; TRANSITION-METALS; APPROXIMATION
AB Local order of liquid Ti is studied by ab initio molecular dynamics to address the unique liquid structure factor in experiments reported recently. The present study reveals that the local order of liquid Ti is in the form of fragments of the distorted icosahedral short range order, where the distortion is induced by strong bond order effects. We show that the fragments in the short-bond rich region separated from the background liquid account for the pronounced feature in structure factor of liquid Ti. (C) 2008 American Institute of Physics.
C1 [Lee, Byeongchan; Lee, Geun Woo] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
   [Lee, Byeongchan] Kyung Hee Univ, Dept Mech Engn, Yongin 446701, South Korea.
   [Lee, Geun Woo] Korea Res Inst Stand & Sci, Taejon 305340, South Korea.
RP Lee, GW (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM gwlee@kriss.re.kr
NR 34
TC 9
Z9 9
U1 1
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUL 14
PY 2008
VL 129
IS 2
AR 024711
DI 10.1063/1.2953458
PG 4
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 326AA
UT WOS:000257629100048
PM 18624556
ER

PT J
AU Maragakis, P
   Ritort, F
   Bustamante, C
   Karplus, M
   Crooks, GE
AF Maragakis, Paul
   Ritort, Felix
   Bustamante, Carlos
   Karplus, Martin
   Crooks, Gavin E.
TI Bayesian estimates of free energies from nonequilibrium work data in the
   presence of instrument noise
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID GROWTH THERMODYNAMIC INTEGRATION; SINGLE-MOLECULE EXPERIMENTS;
   EQUILIBRIUM FREE-ENERGIES; FLUCTUATION THEOREM; STATISTICAL-MECHANICS;
   JARZYNSKIS EQUALITY; SYSTEMS; ERROR; BIAS
AB The Jarzynski equality and the fluctuation theorem relate equilibrium free energy differences to nonequilibrium measurements of the work. These relations extend to single-molecule experiments that have probed the finite-time thermodynamics of proteins and nucleic acids. The effects of experimental error and instrument noise have not been considered previously. Here, we present a Bayesian formalism for estimating free energy changes from nonequilibrium work measurements that compensates for instrument noise and combines data from multiple driving protocols. We reanalyze a recent set of experiments in which a single RNA hairpin is unfolded and refolded using optical tweezers at three different rates. Interestingly, the fastest and farthest-from-equilibrium measurements contain the least instrumental noise and, therefore, provide a more accurate estimate of the free energies than a few slow, more noisy, near-equilibrium measurements. The methods we propose here will extend the scope of single-molecule experiments; they can be used in the analysis of data from measurements with atomic force microscopy, optical, and magnetic tweezers. (c) 2008 American Institute of Physics.
C1 [Maragakis, Paul; Karplus, Martin] Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA.
   [Ritort, Felix] Univ Barcelona, Networking Ctr Bioengn Biomat & Nanomed, CIBER BBN, Fac Fis,Dept Fis Fonamental, Barcelona, Spain.
   [Bustamante, Carlos] Univ Calif Berkeley, Howard Hughes Med Inst, Berkeley, CA 94720 USA.
   [Bustamante, Carlos] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   [Bustamante, Carlos] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
   [Karplus, Martin] Univ Strasbourg 1, Lab Chim Biophys, Inst Sci Ingn Supramol, F-67083 Strasbourg, France.
   [Crooks, Gavin E.] Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Maragakis, P (reprint author), DE Shaw Res, New York, NY 10036 USA.
EM paul.maragakis@deshaw.com; gecrooks@lbl.gov
RI Maragakis, Paul/A-2360-2010; Crooks, Gavin/H-7111-2012
FU NIGMS NIH HHS [GM 32543, R01 GM032543, R37 GM032543]
NR 57
TC 30
Z9 31
U1 3
U2 16
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUL 14
PY 2008
VL 129
IS 2
AR 024102
DI 10.1063/1.2937892
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 326AA
UT WOS:000257629100003
PM 18624511
ER

PT J
AU Pan, LL
   Li, J
   Wang, LS
AF Pan, Li-Li
   Li, Jun
   Wang, Lai-Sheng
TI Low-lying isomers of the B(9)(-) boron cluster: The planar molecular
   wheel versus three-dimensional structures
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; COLLISION-INDUCED DISSOCIATION; AB-INITIO;
   PHOTOELECTRON-SPECTROSCOPY; ELECTRONIC-STRUCTURE; CORRELATION-ENERGY;
   IONS; STABILITY; CHEMISTRY; DYNAMICS
AB The B(9)(-) cluster was found previously to be an unprecedented molecular wheel containing an octacoordinate planar boron with D(8h) symmetry in a combined photoelectron spectroscopy (PES) and theoretical study [H. J. Zhai , Angew. Chem., Int. Ed. 42, 6004 (2003)]. However, the PES spectra of B(9)(-) exhibit minor features that cannot be explained by the global minimum D(8h) structure, suggesting possible contributions from low-lying isomers at finite temperatures. Here we present Car-Parrinello molecular dynamics with simulated annealing simulations to fully explore the potential energy surface of B(9)(-) and search for low-lying isomers that may account for the minor PES features. We performed density functional theory (DFT) calculations with different exchange-correlation functionals and ab initio calculations at various levels of theory with different basis sets. Two three-dimensional low-lying isomers were found, both of C(s) symmetry, 6.29 (C(s)-2) and 10.23 (C(s)-1) kcal/mol higher in energy than the D(8h) structure at the highest CCSD(T) level of theory. Calculated detachment transitions from the C(s)-2 isomer are in excellent agreement with the minor features observed in the PES spectra of B(9)(-). The B(9)(-) cluster proves to be a challenge for most DFT methods and the calculated relative energies strongly depend on the exchange-correlation functionals, providing an excellent example for evaluating the accuracies of various DFT methods. (c) 2008 American Institute of Physics.
C1 [Pan, Li-Li; Li, Jun] Tsinghua Univ, Dept Chem, Inst Theoret & Comp Chem, Beijing 100084, Peoples R China.
   [Li, Jun; Wang, Lai-Sheng] Washington State Univ, Dept Phys, Richland, WA 99354 USA.
   [Li, Jun; Wang, Lai-Sheng] Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA.
RP Pan, LL (reprint author), Tsinghua Univ, Dept Chem, Inst Theoret & Comp Chem, Beijing 100084, Peoples R China.
EM junli@tsinghua.edu.cn; ls.wang@pnl.gov
RI Li, Jun/E-5334-2011
OI Li, Jun/0000-0002-8456-3980
NR 60
TC 45
Z9 45
U1 1
U2 16
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUL 14
PY 2008
VL 129
IS 2
AR 024302
DI 10.1063/1.2948405
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 326AA
UT WOS:000257629100020
PM 18624528
ER

PT J
AU Harris, AL
   Foster, M
   Ryan-Anderson, C
   Peacher, JL
   Madison, DH
AF Harris, A. L.
   Foster, M.
   Ryan-Anderson, Ciaran
   Peacher, J. L.
   Madison, D. H.
TI Projectile interactions in theoretical triple differential cross
   sections for simultaneous excitation-ionization of helium
SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
LA English
DT Article
ID ELECTRON-IMPACT IONIZATION; ION; STATES
AB The importance of projectile interactions in triple differential cross sections (TDCS) is explored for the problem of simultaneous excitation-ionization of helium by electron impact using a new approach that we call the four-body distorted wave model (4DW). The 4DW model includes all projectile interactions, namely initial- and final-state projectile-target interactions, and the post-collision interaction between the two continuum electrons. Results are presented for an incident electron energy of 500 eV and are compared to experimental data, as well as a second-order R-matrix theory and the first Born approximation. Results for absolute TDCS ratios of ionization without excitation to excitation-ionization are also presented.
C1 [Harris, A. L.; Ryan-Anderson, Ciaran; Peacher, J. L.; Madison, D. H.] Missouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 USA.
   [Foster, M.] Los Alamos Natl Lab, Theoret Div T 4 B 283, Los Alamos, NM 87575 USA.
RP Harris, AL (reprint author), Missouri Univ Sci & Technol, Dept Phys, 1315 N Pine St, Rolla, MO 65409 USA.
NR 25
TC 13
Z9 13
U1 1
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-4075
J9 J PHYS B-AT MOL OPT
JI J. Phys. B-At. Mol. Opt. Phys.
PD JUL 14
PY 2008
VL 41
IS 13
AR 135203
DI 10.1088/0953-4075/41/13/135203
PG 7
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 319QF
UT WOS:000257178100007
ER

PT J
AU Minami, T
   Lee, TG
   Pindzola, MS
   Schultz, DR
AF Minami, T.
   Lee, T-G
   Pindzola, M. S.
   Schultz, D. R.
TI Total and state-selective charge transfer in He(2+)+Hcollisions
SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
LA English
DT Article
ID ION-ATOM COLLISIONS; OPTIMIZED DYNAMICAL REPRESENTATION; CLOSE-COUPLING
   CALCULATIONS; DEPENDENT QUANTUM PROBLEMS; ELECTRON-CAPTURE;
   MOLECULAR-HYDROGEN; CROSS-SECTIONS; H COLLISIONS; IONIZATION; HE-2+
AB Total and state-selective cross sections for charge transfer in similar to 1-1000 keV/u He(2+) + H collisions have been calculated using a variety of theoretical approaches, namely, the classical trajectory Monte Carlo, atomic-orbital close-coupling and lattice, time-dependent Schrodinger equation methods. Comparison of the results with available experimental measurements and other theoretical cross sections indicates the regimes in which each method is most reliable. The present cross sections, tabulated here, and their evaluation in light of existing data, provide a new benchmark for this inelastic channel in the fundamental collision system He(2+) + H over a wide range of collision energies and final quantum levels.
C1 [Minami, T.; Pindzola, M. S.] Auburn Univ, Dept Phys, Auburn, AL 36849 USA.
   [Minami, T.; Lee, T-G; Schultz, D. R.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
   [Lee, T-G] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
RP Minami, T (reprint author), Auburn Univ, Dept Phys, Auburn, AL 36849 USA.
RI Lee, Teck Ghee/D-5037-2012
OI Lee, Teck Ghee/0000-0001-9472-3194
NR 36
TC 18
Z9 18
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-4075
J9 J PHYS B-AT MOL OPT
JI J. Phys. B-At. Mol. Opt. Phys.
PD JUL 14
PY 2008
VL 41
IS 13
AR 135201
DI 10.1088/0953-4075/41/13/135201
PG 10
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 319QF
UT WOS:000257178100005
ER

PT J
AU Walter, MD
   Sofield, CD
   Andersen, RA
AF Walter, Marc D.
   Sofield, Chadwick D.
   Andersen, Richard A.
TI Preparation and reactions of base-free
   bis(1,3-di-tert-butylcyclopentadienyl)titanium, Cp '(2) Ti, and related
   compounds
SO ORGANOMETALLICS
LA English
DT Article
ID LANTHANIDE COMPLEXES; MOLECULAR-STRUCTURE; SANDWICH COMPLEXES; FLUORINE
   EXCHANGE; CARBON-MONOXIDE; NITROUS-OXIDE; TITANIUM; TITANOCENE;
   CHEMISTRY; HYDROGEN
AB The titanium(III) metallocene derivatives [1,3-(Me(3)C)(2)C(5)H(3)](2)TiX, Cp '(2)TiX, X = Cl, Me, H, OH, are prepared and shown to be monomeric with a d(1) electron configuration by solid state magnetic susceptibility studies over the temperature range 5-300 K. Reduction of the chloride by potassium amalgam in an argon atmosphere yields the base-free titanocene Cp '(2)Ti, which is a spin triplet over the temperature range 5-300 K. In contrast, reduction in a nitrogen atmosphere gives the dimetal metallocene Cp '(2)Ti(N(2))TiCp '(2), which shows a singlet-triplet equilibrium over the temperature range 5-300 K, which can be modeled by Heisenberg coupling with -2J = 210 cm(-1). The base-free titanocene reacts reversibly with H(2) or C(2)H(4) to give Cp '(2)TiH(2) and CP '(2)Ti(C(2)H(4)), respectively. Both adducts are characterized by X-ray crystallography. The base-free titanocene reacts irreversibly with PhC  CPh or N(2)O to give Cp '(2)Ti(PhC  CPh) and Cp '(4)Ti(2)(mu-O), which are characterized by X-ray crystallography. In contrast Cp '(2)Ti(C(2)H(4)) reacts with N(2)O to give the bisoxo-bridged dimetal derivative Cp '(4)Ti(2)(mu-O)(2).
C1 [Walter, Marc D.; Sofield, Chadwick D.; Andersen, Richard A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem & Chem Sci, Berkeley, CA 94720 USA.
RP Andersen, RA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem & Chem Sci, Berkeley, CA 94720 USA.
EM raandersen@lbl.gov
RI Walter, Marc/E-4479-2012
NR 62
TC 29
Z9 29
U1 1
U2 4
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0276-7333
J9 ORGANOMETALLICS
JI Organometallics
PD JUL 14
PY 2008
VL 27
IS 13
BP 2959
EP 2970
DI 10.1021/om7012315
PG 12
WC Chemistry, Inorganic & Nuclear; Chemistry, Organic
SC Chemistry
GA 323LV
UT WOS:000257448500016
ER

PT J
AU Ji, H
   Ren, Y
   Yamada, M
   Dorfman, S
   Daughton, W
   Gerhardt, SP
AF Ji, H.
   Ren, Y.
   Yamada, M.
   Dorfman, S.
   Daughton, W.
   Gerhardt, S. P.
TI New insights into dissipation in the electron layer during magnetic
   reconnection
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID COLLISIONLESS RECONNECTION; LABORATORY PLASMA; SIMULATIONS; SEPARATOR
AB Detailed comparisons are reported between laboratory observations of electron-scale dissipation layers near a reconnecting X-line and direct two-dimensional full-particle simulations. Many experimental features of the electron layers, such as insensitivity to the ion mass, are reproduced by the simulations; the layer thickness, however, is about 3-5 times larger than the predictions. Consequently, the leading candidate 2D mechanism based on collisionless electron nongyrotropic pressure is insufficient to explain the observed reconnection rates. These results suggest that, in addition to the residual collisions, 3D effects play an important role in electron-scale dissipation during fast reconnection.
C1 [Ji, H.; Yamada, M.; Dorfman, S.; Gerhardt, S. P.] Princeton Plasma Phys Lab, Ctr Magnet Self Org Lab & Astrophys Plasmas, Princeton, NJ 08543 USA.
   [Daughton, W.] Los Alamos Natl Lab, Ctr Magnet Self Org Lab & Astrophys Plasmas, Los Alamos, NM 87545 USA.
   [Ren, Y.] Univ Wisconsin, Dept Phys, Ctr Magnet Self Org Lab & Astrophys Plasmas, Madison, WI 53706 USA.
RP Ji, H (reprint author), Princeton Plasma Phys Lab, Ctr Magnet Self Org Lab & Astrophys Plasmas, POB 451, Princeton, NJ 08543 USA.
EM hji@pppl.gov
RI Yamada, Masaaki/D-7824-2015; Daughton, William/L-9661-2013
OI Yamada, Masaaki/0000-0003-4996-1649; 
NR 29
TC 43
Z9 43
U1 2
U2 10
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD JUL 12
PY 2008
VL 35
IS 13
AR L13106
DI 10.1029/2008GL034538
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 327OU
UT WOS:000257739200005
ER

PT J
AU Levinson, NM
   Seeliger, MA
   Cole, PA
   Kuriyan, J
AF Levinson, Nicholas M.
   Seeliger, Markus A.
   Cole, Philip A.
   Kuriyan, John
TI Structural basis for the recognition of c-Src by its inactivator Csk
SO CELL
LA English
DT Article
ID PROTEIN-TYROSINE KINASE; CRYSTAL-STRUCTURE; SUBSTRATE RECOGNITION;
   V-SRC; DOMAIN; COMPLEX; ACTIVATION; PHOSPHORYLATION; RECEPTOR; ABL
AB The catalytic activity of the Src family of tyrosine kinases is suppressed byphosphorylation on a tyrosine residue located near the C terminus (Tyr 527 in c- Src), which is catalyzed by C-terminal Src Kinase (Csk). Given the promiscuity of most tyrosine kinases, it is remarkable that the C-terminal tails of the Src family kinases are the only known targets of Csk. We have determined the crystal structure of a complex between the kinase domains of Csk and c-Src at 2.9 angstrom resolution, revealing that interactions between these kinases position the C-terminal tail of c-Src at the edge of the active site of Csk. Csk cannot phosphorylate substrates that lack this docking mechanism because the conventional substrate binding site used by most tyrosine kinases to recognize substrates is destabilized in Csk by a deletion in the activation loop.
C1 [Levinson, Nicholas M.; Seeliger, Markus A.; Kuriyan, John] Univ Calif Berkeley, Calif Inst Quantitat Biosci QB3, Howard Hughes Med Inst, Dept Chem,Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
   [Cole, Philip A.] Johns Hopkins Univ, Sch Med, Dept Pharmacol & Mol Sci, Baltimore, MD 21205 USA.
   [Kuriyan, John] Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Kuriyan, J (reprint author), Univ Calif Berkeley, Calif Inst Quantitat Biosci QB3, Howard Hughes Med Inst, Dept Chem,Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
EM kuriyan@berkeley.edu
RI Seeliger, Markus/D-6409-2013
FU Howard Hughes Medical Institute; NCI NIH HHS [R01 CA074305, R01
   CA074305-07, R29 CA074305, R29 CA074305-04]; NIGMS NIH HHS [K99
   GM080097]
NR 66
TC 62
Z9 64
U1 0
U2 8
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 0092-8674
J9 CELL
JI Cell
PD JUL 11
PY 2008
VL 134
IS 1
BP 124
EP 134
DI 10.1016/j.cell.2008.05.051
PG 11
WC Biochemistry & Molecular Biology; Cell Biology
SC Biochemistry & Molecular Biology; Cell Biology
GA 324IU
UT WOS:000257513100019
PM 18614016
ER

PT J
AU Mineev-Weinstein, M
   Putinar, M
   Teodorescu, R
AF Mineev-Weinstein, Mark
   Putinar, Mihai
   Teodorescu, Razvan
TI Random matrices in 2D, Laplacian growth and operator theory
SO JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
LA English
DT Review
ID HELE-SHAW CELL; DIFFUSION-LIMITED AGGREGATION; SPONTANEOUS
   SYMMETRY-BREAKING; MOVING-BOUNDARY-PROBLEMS; 2-DIMENSIONAL L-PROBLEM;
   QUADRATURE DOMAINS; INTERFACE DYNAMICS; STATISTICAL THEORY;
   PATTERN-FORMATION; COMPLEX SYSTEMS
AB Since it was first applied to the study of nuclear interactions by Wigner and Dyson, almost 60 years ago, random matrix theory (RMT) has developed into a field of its own within applied mathematics, and is now essential to many parts of theoretical physics, from condensed matter to high energy. The fundamental results obtained so far rely mostly on the theory of random matrices in one dimension (the dimensionality of the spectrum or equilibrium probability density). In the last few years, this theory has been extended to the case where the spectrum is two dimensional, or even fractal, with dimensions between 1 and 2. In this paper, we review these recent developments and indicate some physical problems where the theory can be applied.
C1 [Mineev-Weinstein, Mark] Los Alamos Natl Lab, Los Alamos, NM 87505 USA.
   [Putinar, Mihai] UCSB, Dept Math, Santa Barbara, CA 93106 USA.
   [Teodorescu, Razvan] Div Theoret, Los Alamos, NM 87505 USA.
   [Teodorescu, Razvan] Ctr Nonlinear Studies, Los Alamos, NM 87505 USA.
RP Mineev-Weinstein, M (reprint author), Los Alamos Natl Lab, MS P365, Los Alamos, NM 87505 USA.
EM mariner@lanl.gov; mputinar@math.ucsb.edu; razvan@lanl.gov
OI Teodorescu, Razvan/0000-0002-7202-1949
NR 156
TC 15
Z9 15
U1 1
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1751-8113
J9 J PHYS A-MATH THEOR
JI J. Phys. A-Math. Theor.
PD JUL 11
PY 2008
VL 41
IS 26
AR 263001
DI 10.1088/1751-8113/41/26/263001
PG 74
WC Physics, Multidisciplinary; Physics, Mathematical
SC Physics
GA 312TP
UT WOS:000256694000003
ER

PT J
AU Sinitsyn, NA
   Ohkubo, J
AF Sinitsyn, N. A.
   Ohkubo, J.
TI Hannay angle and geometric phase shifts under adiabatic parameter
   changes in classical dissipative systems
SO JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
LA English
DT Article
ID LOW REYNOLDS-NUMBER; SELF-PROPULSION
AB Kepler and Kagan (1991 Phys. Rev. Lett. 66 847) derived a geometric phase shift in dissipative limit cycle evolution. This effect was considered as an extension of the geometric phase in classical mechanics. We show that the opposite is also true, namely, this geometric phase can be identified with the classical mechanical Hannay angle in an extended phase space. Our results suggest that this phase can be generalized to a stochastic evolution with an additional noise term in evolution equations.
C1 [Sinitsyn, N. A.] Los Alamos Natl Lab, Computat & Stat Sci Div, Ctr Nonlinear Studies & Comp, Los Alamos, NM 87545 USA.
   [Ohkubo, J.] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan.
RP Sinitsyn, NA (reprint author), Los Alamos Natl Lab, Computat & Stat Sci Div, Ctr Nonlinear Studies & Comp, Los Alamos, NM 87545 USA.
RI Sinitsyn, nikolai/B-5617-2009
NR 13
TC 5
Z9 5
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1751-8113
J9 J PHYS A-MATH THEOR
JI J. Phys. A-Math. Theor.
PD JUL 11
PY 2008
VL 41
IS 26
AR 262002
DI 10.1088/1751-8113/41/26/262002
PG 4
WC Physics, Multidisciplinary; Physics, Mathematical
SC Physics
GA 312TP
UT WOS:000256694000002
ER

PT J
AU El Gabaly, F
   McCarty, KF
   Schmid, AK
   de la Figuera, J
   Munoz, MC
   Szunyogh, L
   Weinberger, P
   Gallego, S
AF El Gabaly, Farid
   McCarty, Kevin F.
   Schmid, Andreas K.
   de la Figuera, Juan
   Carmen Munoz, M.
   Szunyogh, Laszlo
   Weinberger, Peter
   Gallego, Silvia
TI Noble metal capping effects on the spin-reorientation transitions of
   Co/Ru(0001)
SO NEW JOURNAL OF PHYSICS
LA English
DT Article
ID MAGNETIC CIRCULAR-DICHROISM; ENERGY-ELECTRON MICROSCOPY; PERPENDICULAR
   ANISOTROPY; THIN-FILMS; FERROMAGNETIC-RESONANCE; ULTRATHIN FILMS; COBALT
   FILMS; CO FILMS; SURFACE; SUPERLATTICES
AB Thin films of Co/Ru(0001) are known to exhibit an unusual spin reorientation transition (SRT) coupled to the completion of Co atomic layers for Co thicknesses under four layers. By means of spin-polarized low-energy electron microscopy, we follow in real space the magnetization orientation during the growth of atomically thick capping layers on Co/Ru(0001). Capping with noble metal (Cu, Ag and Au) elements modifies the SRT depending on the Co and overlayer thickness and on the overlayer material, resulting in an expanded range of structures with high perpendicular magnetic anisotropy. The origin of the SRT can be explained in terms of ab initio calculations of the layer-resolved contributions to the magnetic anisotropy energy. Besides the changes in the SRT introduced by the capping, a quantitative enhancement of the magnetic anisotropy is identified. A detailed analysis of the interplay between strain and purely electronic effects allows us to identify the conditions that lead to a high perpendicular magnetic anisotropy in thin hcp Co films.
C1 [El Gabaly, Farid; de la Figuera, Juan] Univ Autonoma Madrid, Ctr Microanal Mat, E-28049 Madrid, Spain.
   [El Gabaly, Farid; Schmid, Andreas K.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [McCarty, Kevin F.] Sandia Natl Labs, Livermore, CA 94550 USA.
   [de la Figuera, Juan] CSIC, Inst Quim Fis Rocasolano, E-28006 Madrid, Spain.
   [Carmen Munoz, M.; Gallego, Silvia] CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain.
   [Szunyogh, Laszlo] Budapest Univ Technol & Econ, Inst Phys, Dept Theoret Phys, H-111 Budapest, Hungary.
   [Weinberger, Peter] Ctr Computat Nanosci, A-1010 Vienna, Austria.
RP de la Figuera, J (reprint author), Univ Autonoma Madrid, Ctr Microanal Mat, E-28049 Madrid, Spain.
EM juan.delafiguera@iqfr.csic.es
RI Szunyogh, Laszlo/A-7956-2010; Munoz, Carmen/F-6970-2012; McCarty,
   Kevin/F-9368-2012; Gallego Queipo, Silvia/J-3411-2012; de la Figuera,
   Juan/E-7046-2010; 
OI Munoz, Carmen/0000-0003-1504-1692; McCarty, Kevin/0000-0002-8601-079X;
   de la Figuera, Juan/0000-0002-7014-4777; Gallego,
   Silvia/0000-0003-0915-3276
NR 56
TC 16
Z9 16
U1 2
U2 12
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 1367-2630
J9 NEW J PHYS
JI New J. Phys.
PD JUL 11
PY 2008
VL 10
AR 073024
DI 10.1088/1367-2630/10/7/073024
PG 22
WC Physics, Multidisciplinary
SC Physics
GA 324NE
UT WOS:000257524500003
ER

PT J
AU Acosta, D
   Adam, A
   Andreev, V
   Apollinari, G
   Baek, Y
   Banicz, K
   Barashko, V
   Barberis, E
   Bartalini, P
   Bloch, I
   Boeriu, O
   Bondar, N
   Breedon, R
   Bujak, A
   Bylsma, B
   Chen, M
   Clare, R
   Cline, D
   Cousins, R
   Cox, PT
   Denisov, A
   Drozdetskiy, A
   Durkin, S
   Eartly, D
   Ershov, Y
   Ferguson, T
   Fortin, D
   Geurts, F
   Gilmore, J
   Golovtsov, V
   Golutvin, I
   Golyash, A
   Gu, J
   Gutay, L
   Hauser, J
   He, K
   Holbrook, B
   Holmes, D
   Ignatenko, M
   Ippolito, N
   Ivanov, Y
   Jiang, C
   Kao, SC
   Karjavin, V
   Khabarov, S
   Killewald, P
   Ko, W
   Kotov, K
   Korytov, A
   Kozhevnikov, Y
   Lanaro, A
   Levchenko, P
   Ling, TY
   Liu, J
   Loveless, R
   Lusin, S
   Madorsky, A
   Matveev, M
   Medved, S
   Mitselmakher, G
   Moisenz, P
   Padley, BP
   Pakhotin, Y
   Pal, I
   Perelygin, V
   Petrunin, A
   Pischalnikov, Y
   Pivarsky, J
   Prokofiev, O
   Rakness, G
   Roberts, J
   Roe, A
   Safonov, A
   Schetkovsky, A
   Schipunov, L
   Schmitt, M
   Scurlock, B
   Sknar, V
   Stoynev, S
   Sulimov, V
   Sun, H
   Sytnik, V
   Tchekhovski, V
   Terentyev, N
   Tripathi, M
   Tucker, J
   Tumanov, A
   Uvarov, L
   Valuev, V
   Vassillev, S
   Vavilov, S
   Velichko, G
   Volkov, S
   von der Mey, M
   Vorobiev, I
   Vorobyev, A
   Vorobyev, A
   Wang, D
   Williams, GL
   Yatsura, V
   Zarubin, A
   Zhao, W
   Zheng, Y
   Zhmakin, G
   Zhu, Z
   Zilizi, G
AF Acosta, D.
   Adam, A.
   Andreev, V.
   Apollinari, G.
   Baek, Y.
   Banicz, K.
   Barashko, V.
   Barberis, E.
   Bartalini, P.
   Bloch, I.
   Boeriu, O.
   Bondar, N.
   Breedon, R.
   Bujak, A.
   Bylsma, B.
   Chen, M.
   Clare, R.
   Cline, D.
   Cousins, R.
   Cox, P. T.
   Denisov, A.
   Drozdetskiy, A.
   Durkin, S.
   Eartly, D.
   Ershov, Yu.
   Ferguson, T.
   Fortin, D.
   Geurts, F.
   Gilmore, J.
   Golovtsov, V.
   Golutvin, I.
   Golyash, A.
   Gu, J.
   Gutay, L.
   Hauser, J.
   He, K.
   Holbrook, B.
   Holmes, D.
   Ignatenko, M.
   Ippolito, N.
   Ivanov, Yu.
   Jiang, C.
   Kao, S. -C.
   Karjavin, V.
   Khabarov, S.
   Killewald, P.
   Ko, W.
   Kotov, K.
   Korytov, A.
   Kozhevnikov, Yu.
   Lanaro, A.
   Levchenko, P.
   Ling, T. Y.
   Liu, J.
   Loveless, R.
   Lusin, S.
   Madorsky, A.
   Matveev, M.
   Medved, S.
   Mitselmakher, G.
   Moisenz, P.
   Padley, B. P.
   Pakhotin, Yu.
   Pal, I.
   Perelygin, V.
   Petrunin, A.
   Pischalnikov, Yu.
   Pivarsky, J.
   Prokofiev, O.
   Rakness, G.
   Roberts, J.
   Roe, A.
   Safonov, A.
   Schetkovsky, A.
   Schipunov, L.
   Schmitt, M.
   Scurlock, B.
   Sknar, V.
   Stoynev, S.
   Sulimov, V.
   Sun, H.
   Sytnik, V.
   Tchekhovski, V.
   Terentyev, N.
   Tripathi, M.
   Tucker, J.
   Tumanov, A.
   Uvarov, L.
   Valuev, V.
   Vassillev, S.
   Vavilov, S.
   Velichko, G.
   Volkov, S.
   von der Mey, M.
   Vorobiev, I.
   Vorobyev, A.
   Vorobyev, An.
   Wang, D.
   Williams, G. L.
   Yatsura, V.
   Zarubin, A.
   Zhao, W.
   Zheng, Y.
   Zhmakin, G.
   Zhu, Z.
   Zilizi, G.
TI Efficiency of finding muon track trigger primitives in CMS cathode strip
   chambers
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE LHC; CMS; muon; cathode strip chamber; trigger; efficiency
ID LEVEL
AB In the Compact Muon Solenoid (CMS) experiment, muon detection in the forward direction is accomplished by cathode strip chambers (CSC). These detectors identify muons, provide a fast muon trigger, and give a precise measurement of the muon trajectory. There are 468 six-plane CSCs in the system. The efficiency of finding muon trigger primitives (muon track segments) was studied using 36 CMS CSCs and cosmic ray muons during the Magnet Test and Cosmic Challenge (MTCC) exercise conducted by the CNIS experiment in 2006. In contrast to earlier studies that used muon beams to illuminate a very small chamber area (<0.01 m(2))(,) results presented in this paper were obtained by many installed CSCs operating in situ over an area of approximate to 23 m(2) as a part of the CMS experiment. The efficiency of finding two-dimensional trigger primitives within six-layer chambers was found to be 99.93 +/- 0.03%. These segments, found by the CSC electronics within 800 ns after the passing of a muon through the chambers, are the input information for the Level-1 muon trigger and, also, are a necessary condition for chambers to be read out by the Data Acquisition System. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Acosta, D.; Barashko, V.; Bartalini, P.; Drozdetskiy, A.; Holmes, D.; Kotov, K.; Korytov, A.; Mitselmakher, G.; Pakhotin, Yu.; Scurlock, B.; Wang, D.] Univ Florida, Dept Phys, Gainesville, FL 32611 USA.
   [Adam, A.; Banicz, K.; Bujak, A.; Gutay, L.; Ippolito, N.; Kozhevnikov, Yu.; Medved, S.; Pal, I.; Zilizi, G.] Purdue Univ, W Lafayette, IN 47907 USA.
   [Andreev, V.; Cline, D.; Cousins, R.; Hauser, J.; Ignatenko, M.; Rakness, G.; Tucker, J.; Valuev, V.; von der Mey, M.; Zheng, Y.] Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
   [Apollinari, G.; Bloch, I.; Eartly, D.; Geurts, F.; Lusin, S.; Pischalnikov, Yu.; Prokofiev, O.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   [Baek, Y.; Lanaro, A.; Loveless, R.] Univ Wisconsin, Madison, WI 53706 USA.
   [Barberis, E.; Boeriu, O.; Roe, A.] Northeastern Univ, Boston, MA 02115 USA.
   [Bondar, N.; Denisov, A.; Golovtsov, V.; Ivanov, Yu.; Petrunin, A.; Schetkovsky, A.; Schipunov, L.; Sknar, V.; Sulimov, V.; Uvarov, L.; Vavilov, S.; Velichko, G.; Volkov, S.; Vorobyev, A.; Yatsura, V.; Zhmakin, G.] Petersburg Nucl Phys Inst, St Petersburg, Russia.
   [Breedon, R.; Cox, P. T.; Holbrook, B.; Ko, W.; Tripathi, M.] Univ Calif Davis, Davis, CA 95616 USA.
   [Bylsma, B.; Durkin, S.; Gilmore, J.; Gu, J.; Ling, T. Y.; Williams, G. L.] Ohio State Univ, Columbus, OH 43210 USA.
   [Chen, M.; He, K.; Jiang, C.; Sun, H.; Zhao, W.; Zhu, Z.] Inst High Energy Phys, Beijing, Peoples R China.
   [Clare, R.; Fortin, D.; Kao, S. -C.; Sytnik, V.] Univ Calif Riverside, Riverside, CA 92521 USA.
   [Ershov, Yu.; Golutvin, I.; Karjavin, V.; Khabarov, S.; Killewald, P.; Moisenz, P.; Perelygin, V.; Tchekhovski, V.; Vassillev, S.; Zarubin, A.] Joint Inst Nucl Res, Dubna, Russia.
   [Ferguson, T.; Terentyev, N.; Vorobiev, I.] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
   [Golyash, A.; Pivarsky, J.; Safonov, A.] Texas A&M Univ, College Stn, TX 77843 USA.
   [Liu, J.; Matveev, M.; Padley, B. P.; Roberts, J.; Tumanov, A.] Rice Univ, Houston, TX 77005 USA.
   [Schmitt, M.; Stoynev, S.] Northwestern Univ, Evanston, IL 60208 USA.
RP Pakhotin, Y (reprint author), Univ Florida, Dept Phys, Gainesville, FL 32611 USA.
EM pakhotin@ufl.edu
RI Ferguson, Thomas/O-3444-2014; 
OI Ferguson, Thomas/0000-0001-5822-3731; Levchenko,
   Petr/0000-0003-4913-0538
NR 14
TC 3
Z9 3
U1 0
U2 0
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 JUL 11
PY 2008
VL 592
IS 1-2
BP 26
EP 37
DI 10.1016/j.nima.2008.03.118
PG 12
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 334AC
UT WOS:000258193700004
ER

PT J
AU Bleuel, M
   Fitzsimmons, MR
   Lal, J
AF Bleuel, M.
   Fitzsimmons, M. R.
   Lal, J.
TI Quasi-elastic measurements using neutron spin flippers
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE polarized neutron reflectometry; quasi-elastic; neutron spin flipper;
   intensity modulation
ID SCATTERING
AB A method for low-resolution quasi-elastic measurements using commonly available components on a polarized neutron beam reflectometer is demonstrated. By amplitude modulation of the current in a neutron spin flipper placed between the neutron beam polarizer and polarization analyzer, the intensity of the neutron beam illuminating a sample is similarly modulated (or chopped). We show that the intensity contrast between subsequent chopped pulses is dramatically reduced by a sample that changes neutron velocity. Published by Elsevier B.V.
C1 [Bleuel, M.; Lal, J.] Argonne Natl Lab, Argonne, IL 60439 USA.
   [Fitzsimmons, M. R.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Bleuel, M (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM mbleuel@anl.gov
RI Lujan Center, LANL/G-4896-2012
NR 6
TC 2
Z9 2
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 JUL 11
PY 2008
VL 592
IS 1-2
BP 100
EP 103
DI 10.1016/j.nima.2008.03.117
PG 4
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 334AC
UT WOS:000258193700012
ER

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CA BABAR Collaboration
TI Evidence for CP violation in B-0 -> J/psi pi(0) decays
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID B-DECAYS; PHYSICS
AB We present measurements of the branching fraction and time-dependent CP asymmetries in B-0 -> J/psi pi(0) decays based on 466x10(6) Gamma(4S)-> B (B) over bar events collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. We measure the CP asymmetry parameters S=-1.23 +/- 0.21(stat) +/- 0.04(syst) and C=-0.20 +/- 0.19(stat)+/- 0.03(syst), where the measured value of (S, C) is 4.0 standard deviations from (0, 0) including systematic uncertainties. The branching fraction is determined to be B(B-0 -> J/psi pi(0))=[1.69 +/- 0.14(stat)+/- 0.07(syst)]x10(-5).
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   [Biasini, M.; Covarelli, R.; Manoni, E.] Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
   [Biasini, M.; Covarelli, R.; Manoni, E.] Ist Nazl Fis Nucl, 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.] Univ Pisa, Dipartimento Fis, Scuola Normale Super, I-56127 Pisa, 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, 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.
   [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.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
   [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, I-00185 Rome, Italy.
   [Ebert, M.; Hartmann, T.; Schroeder, H.; Waldi, R.] Univ Rostock, D-18051 Rostock, Germany.
   [Adye, T.; Franek, B.; Olaiya, E. O.; Roethel, W.; Wilson, F. F.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
   [Emery, S.; Escalier, M.; 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.; 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.; Ye, S.] Univ Texas Dallas, Richardson, TX 75083 USA.
   [Bianchi, F.; Gamba, D.; Pelliccioni, M.] Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
   [Bianchi, F.; Gamba, D.; Pelliccioni, M.] Ist Nazl Fis Nucl, I-10125 Turin, Italy.
   [Bomben, M.; Bosisio, L.; Cartaro, C.; Della Ricca, G.; Lanceri, L.; Vitale, L.] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
   [Bomben, M.; Bosisio, L.; Cartaro, C.; Della Ricca, G.; Lanceri, L.; Vitale, L.] Ist Nazl Fis Nucl, I-34127 Trieste, Italy.
   [Azzolini, V.; Lopez-March, N.; Martinez-Vidal, F.; Milanes, D. A.; Oyanguren, A.] Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain.
   [Albert, J.; Banerjee, Sw.; Bhuyan, B.; Choi, H. H. F.; Hamano, K.; 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.
RP Aubert, B (reprint author), IN2P3 CNRS, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
RI White, Ryan/E-2979-2015; 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; Oyanguren,
   Arantza/K-6454-2014; Luppi, Eleonora/A-4902-2015; Patrignani,
   Claudia/C-5223-2009; Della Ricca, Giuseppe/B-6826-2013; Lista,
   Luca/C-5719-2008; de Sangro, Riccardo/J-2901-2012; Saeed, Mohammad
   Alam/J-7455-2012; Neri, Nicola/G-3991-2012; Rotondo,
   Marcello/I-6043-2012; Forti, Francesco/H-3035-2011; Negrini,
   Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012
OI Raven, Gerhard/0000-0002-2897-5323; White, Ryan/0000-0003-3589-5900;
   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;
   Oyanguren, Arantza/0000-0002-8240-7300; Luppi,
   Eleonora/0000-0002-1072-5633; Patrignani, Claudia/0000-0002-5882-1747;
   Della Ricca, Giuseppe/0000-0003-2831-6982; de Sangro,
   Riccardo/0000-0002-3808-5455; Saeed, Mohammad Alam/0000-0002-3529-9255;
   Neri, Nicola/0000-0002-6106-3756; Rotondo, Marcello/0000-0001-5704-6163;
   Forti, Francesco/0000-0001-6535-7965; Negrini,
   Matteo/0000-0003-0101-6963; Monge, Maria Roberta/0000-0003-1633-3195
NR 23
TC 36
Z9 36
U1 0
U2 3
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 JUL 11
PY 2008
VL 101
IS 2
AR 021801
DI 10.1103/PhysRevLett.101.021801
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 324XW
UT WOS:000257553700008
ER

PT J
AU Bonatsos, D
   McCutchan, EA
   Casten, RF
AF Bonatsos, Dennis
   McCutchan, E. A.
   Casten, R. F.
TI Unified description of 0(+) states in a large class of nuclear
   collective models
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID CRITICAL-POINT SYMMETRY; INTERACTING-BOSON MODEL; DYNAMIC SYMMETRY;
   PHASE-TRANSITION
AB A remarkably simple regularity in the energies of 0(+) states in a broad class of collective models is discussed. A single formula for all 0(+) states in flat-bottomed infinite potentials that depends only on the number of dimensions and a simpler expression applicable to all three interacting boson approximation symmetries in the large N-B limit are presented. Finally, a connection between the energy expression for 0(+) states given by the X(5) model and the predictions of the interacting boson approximation near the critical point of the first order phase transition is explored.
C1 [Bonatsos, Dennis] NCSR Demokritos, Inst Nucl Phys, GR-15310 Athens, Greece.
   [McCutchan, E. A.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   [Casten, R. F.] Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA.
RP Bonatsos, D (reprint author), NCSR Demokritos, Inst Nucl Phys, GR-15310 Athens, Greece.
NR 33
TC 18
Z9 18
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 11
PY 2008
VL 101
IS 2
AR 022501
DI 10.1103/PhysRevLett.101.022501
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 324XW
UT WOS:000257553700014
PM 18764176
ER

PT J
AU Chacon, L
   Simakov, AN
   Lukin, VS
   Zocco, A
AF Chacon, L.
   Simakov, Andrei N.
   Lukin, V. S.
   Zocco, A.
TI Fast reconnection in nonrelativistic 2D electron-positron plasmas
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID PAIR PLASMAS
AB In this Letter, we put forth (and validate numerically) a fluid-based analytical theory, which predicts that fast reconnection in nonrelativistic, low-beta pair plasmas is possible in collisionless regimes. This novel theoretical result complements recent kinetic computational evidence and challenges the accepted understanding, which considers fast dispersive waves (not supported in pair plasmas) as the key enabling physics ingredient for fast reconnection. The implications of this theory for the understanding of fast reconnection in standard electron-proton plasmas are discussed.
C1 [Chacon, L.; Simakov, Andrei N.; Zocco, A.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   [Lukin, V. S.] Univ Washington, Seattle, WA 98195 USA.
   [Zocco, A.] Politecn Torino, Turin, Italy.
RP Chacon, L (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
OI Simakov, Andrei/0000-0001-7064-9153; Chacon, Luis/0000-0002-4566-8763
NR 12
TC 17
Z9 17
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 11
PY 2008
VL 101
IS 2
AR 025003
DI 10.1103/PhysRevLett.101.025003
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 324XW
UT WOS:000257553700025
PM 18764187
ER

PT J
AU Kato, T
   Shibauchi, T
   Matsuda, Y
   Thompson, JR
   Krusin-Elbaum, L
AF Kato, T.
   Shibauchi, T.
   Matsuda, Y.
   Thompson, J. R.
   Krusin-Elbaum, L.
TI Entanglement of solid vortex matter: A boomerang-shaped reduction forced
   by disorder in interlayer phase coherence in Bi(2)Sr(2)CaCu(2)O(8+y)
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID JOSEPHSON PLASMA RESONANCE; SPLAYED COLUMNAR DEFECTS; COUPLING
   TRANSITION; DIRECTED POLYMERS; LINEAR DEFECTS; SUPERCONDUCTORS; LIQUID;
   STATE; FREQUENCY; CRYSTALS
AB We present evidence for entangled solid vortex matter in a glassy state in a layered superconductor Bi(2)Sr(2)CaCu(2)O(8+y) containing randomly splayed linear defects. The interlayer phase coherence-probed by the Josephson plasma resonance-is enhanced at high temperatures, reflecting the recoupling of vortex liquid by the defects. At low temperatures in the vortex solid state, the interlayer coherence follows a boomerang-shaped reentrant temperature path with an unusual low-field decrease in coherence, indicative of meandering vortices. We uncover a distinct temperature scaling between in-plane and out-of-plane critical currents with opposing dependencies on field and time, consistent with the theoretically proposed "splayed-glass" state.
C1 [Kato, T.; Shibauchi, T.; Matsuda, Y.] Kyoto Univ, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan.
   [Matsuda, Y.] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan.
   [Thompson, J. R.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
   [Thompson, J. R.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
   [Krusin-Elbaum, L.] IBM Corp, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA.
RP Kato, T (reprint author), Kyoto Univ, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan.
RI Shibauchi, Takasada/B-9349-2008
OI Shibauchi, Takasada/0000-0001-5831-4924
NR 32
TC 1
Z9 1
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 11
PY 2008
VL 101
IS 2
AR 027003
DI 10.1103/PhysRevLett.101.027003
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 324XW
UT WOS:000257553700055
PM 18764217
ER

PT J
AU Raebiger, H
   Lany, S
   Zunger, A
AF Raebiger, Hannes
   Lany, Stephan
   Zunger, Alex
TI Control of ferromagnetism via electron doping in In(2)O(3): Cr
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID HIGH-TEMPERATURE FERROMAGNETISM; MAGNETIC SEMICONDUCTORS; OXIDE; FILMS
AB Carrier-induced ferromagnetism in wide-gap transparent conductive oxides has been widely discussed and debated, leading to confusion and skepticism regarding whether dilute magnetic oxides exist at all. We show from density-functional calculations within a band-gap corrected approach that ferromagnetic Cr-Cr coupling can be switched on and off via electron doping in the wide-gap transparent n-type conductive oxide In(2)O(3). We show that (i) Cr does not produce in In(2)O(3) any free electrons and renders the system an insulating paramagnet. (ii) Extrinsic n-type doping of In(2)O(3):Cr via Sn produces free electrons, whose concentration is controllable via the oxygen partial pressure. Such additional carriers stabilize a strong long-range Cr-Cr ferromagnetic coupling.
C1 [Raebiger, Hannes; Lany, Stephan; Zunger, Alex] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Raebiger, H (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
RI Zunger, Alex/A-6733-2013; Raebiger, Hannes/D-1881-2013
OI Raebiger, Hannes/0000-0003-3969-9165
NR 30
TC 50
Z9 52
U1 0
U2 17
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 11
PY 2008
VL 101
IS 2
AR 027203
DI 10.1103/PhysRevLett.101.027203
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 324XW
UT WOS:000257553700060
PM 18764222
ER

PT J
AU Romagnani, L
   Bulanov, SV
   Borghesi, M
   Audebert, P
   Gauthier, JC
   Loewenbrueck, K
   Mackinnon, AJ
   Patel, P
   Pretzler, G
   Toncian, T
   Willi, O
AF Romagnani, L.
   Bulanov, S. V.
   Borghesi, M.
   Audebert, P.
   Gauthier, J. C.
   Loewenbrueck, K.
   Mackinnon, A. J.
   Patel, P.
   Pretzler, G.
   Toncian, T.
   Willi, O.
TI Observation of collisionless shocks in laser-plasma experiments
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
AB The propagation in a rarefied plasma (n(e)less than or similar to 10(15) cm(-3)) of collisionless shock waves and ion-acoustic solitons, excited following the interaction of a long (tau(L)similar to 470 ps) and intense (I similar to 10(15) W cm(-2)) laser pulse with solid targets, has been investigated via proton probing techniques. The shocks' structures and related electric field distributions were reconstructed with high spatial and temporal resolution. The experimental results were interpreted within the framework of the nonlinear wave description based on the Korteweg-de Vries-Burgers equation.
C1 [Romagnani, L.; Borghesi, M.] Queens Univ Belfast, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland.
   [Bulanov, S. V.] JAEA, APRC, Kyoto 6190215, Japan.
   [Bulanov, S. V.] Prokhorov Inst Gen Phys RAS, Moscow 119991, Russia.
   [Audebert, P.] Univ Paris 06, Ecole Polytech, CEA,CNRS,UMR 7605, LULI, F-91128 Palaiseau, France.
   [Gauthier, J. C.] Univ Bordeaux 1, CNRS, CEA, Ctr Lasers Intenses & Applicat, F-33405 Talence, France.
   [Loewenbrueck, K.; Pretzler, G.; Toncian, T.; Willi, O.] Univ Dusseldorf, Inst Laser & Plasmaphys, Dusseldorf, Germany.
   [Mackinnon, A. J.; Patel, P.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Romagnani, L (reprint author), Queens Univ Belfast, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland.
EM l.romagnani@qub.ac.uk
RI Patel, Pravesh/E-1400-2011; Borghesi, Marco/K-2974-2012; MacKinnon,
   Andrew/P-7239-2014; Bulanov, Sergei/A-1721-2013
OI MacKinnon, Andrew/0000-0002-4380-2906; 
NR 17
TC 69
Z9 69
U1 3
U2 13
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 11
PY 2008
VL 101
IS 2
AR 025004
DI 10.1103/PhysRevLett.101.025004
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 324XW
UT WOS:000257553700026
PM 18764188
ER

PT J
AU Sau, JD
   Neaton, JB
   Choi, HJ
   Louie, SG
   Cohen, ML
AF Sau, Jay D.
   Neaton, J. B.
   Choi, Hyoung Joon
   Louie, Steven G.
   Cohen, Marvin L.
TI Electronic energy levels of weakly coupled nanostructures: C-60-metal
   interfaces
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; QUASI-PARTICLE ENERGIES; C-60; IONIZATION;
   INSULATORS; CLUSTERS; CELLS
AB A new approach based on density functional theory and the Anderson impurity model is developed to calculate charging energies and quasiparticle energy gaps of molecular systems weakly coupled to an environment. The approach is applied to C-60 adsorbed on Au(111) and Ag(100) surfaces, resulting in electronic structures that are in excellent agreement with recent experiments. Image-charge screening effects on molecular orbital energies are found to be of similar magnitude for the two surfaces, but charge-transfer screening and spin fluctuations also affect the Ag case due to a partially occupied C-60 orbital.
C1 [Sau, Jay D.; Louie, Steven G.; Cohen, Marvin L.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   [Sau, Jay D.; Louie, Steven G.; Cohen, Marvin L.] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   [Neaton, J. B.] Lawrence Berkeley Natl Lab, Mol Foundry, Berkeley, CA 94720 USA.
   [Choi, Hyoung Joon] Yonsei Univ, Dept Phys, Seoul 120749, South Korea.
   [Choi, Hyoung Joon] Yonsei Univ, IPAP, Seoul 120749, South Korea.
RP Sau, JD (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM jay@civet.berkeley.edu
RI Choi, Hyoung Joon/N-8933-2015; Neaton, Jeffrey/F-8578-2015
OI Choi, Hyoung Joon/0000-0001-8565-8597; Neaton,
   Jeffrey/0000-0001-7585-6135
NR 38
TC 70
Z9 70
U1 1
U2 20
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 11
PY 2008
VL 101
IS 2
AR 026804
DI 10.1103/PhysRevLett.101.026804
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 324XW
UT WOS:000257553700051
PM 18764213
ER

PT J
AU Slifer, K
   Amarian, M
   Auerbach, L
   Averett, T
   Berthot, J
   Bertin, P
   Bertozzi, B
   Black, T
   Brash, E
   Brown, D
   Burtin, E
   Calarco, J
   Cates, G
   Chai, Z
   Chen, JP
   Choi, S
   Chudakov, E
   Atti, CCD
   Cisbani, E
   de Jager, CW
   Deur, A
   DiSalvo, R
   Dieterich, S
   Djawotho, P
   Finn, M
   Fissum, K
   Fonvieille, H
   Frullani, S
   Gao, H
   Gao, J
   Garibaldi, F
   Gasparian, A
   Gilad, S
   Gilman, R
   Glamazdin, A
   Glashausser, C
   Glockle, W
   Golak, J
   Goldberg, E
   Gomez, J
   Gorbenko, V
   Hansen, JO
   Hersman, B
   Holmes, R
   Huber, GM
   Hughes, E
   Humensky, B
   Incerti, S
   Iodice, M
   Jensen, S
   Jiang, X
   Jones, C
   Jones, G
   Jones, M
   Jutier, C
   Kamada, H
   Ketikyan, A
   Kominis, I
   Korsch, W
   Kramer, K
   Kumar, K
   Kumbartzki, G
   Kuss, M
   Lakuriqi, E
   Laveissiere, G
   Lerose, JJ
   Liang, M
   Liyanage, N
   Lolos, G
   Malov, S
   Marroncle, J
   McCormick, K
   McKeown, RD
   Meziani, ZE
   Michaels, R
   Mitchell, J
   Nogga, A
   Pace, E
   Papandreou, Z
   Pavlin, T
   Petratos, GG
   Pripstein, D
   Prout, D
   Ransome, R
   Roblin, Y
   Rowntree, D
   Rvachev, M
   Sabatie, F
   Saha, A
   Salme, G
   Scopetta, S
   Skibinski, R
   Souder, P
   Saito, T
   Strauch, S
   Suleiman, R
   Takahashi, K
   Teijiro, S
   Todor, L
   Tsubota, H
   Ueno, H
   Urciuoli, G
   Van der Meer, R
   Vernin, P
   Voskanian, H
   Witala, H
   Wojtsekhowski, B
   Xiong, F
   Xu, W
   Yang, JC
   Zhang, B
   Zolnierczuk, P
AF Slifer, K.
   Amarian, M.
   Auerbach, L.
   Averett, T.
   Berthot, J.
   Bertin, P.
   Bertozzi, B.
   Black, T.
   Brash, E.
   Brown, D.
   Burtin, E.
   Calarco, J.
   Cates, G.
   Chai, Z.
   Chen, J. -P.
   Choi, Seonho
   Chudakov, E.
   Atti, C. Ciofi degli
   Cisbani, E.
   de Jager, C. W.
   Deur, A.
   DiSalvo, R.
   Dieterich, S.
   Djawotho, P.
   Finn, M.
   Fissum, K.
   Fonvieille, H.
   Frullani, S.
   Gao, H.
   Gao, J.
   Garibaldi, F.
   Gasparian, A.
   Gilad, S.
   Gilman, R.
   Glamazdin, A.
   Glashausser, C.
   Gloeckle, W.
   Golak, J.
   Goldberg, E.
   Gomez, J.
   Gorbenko, V.
   Hansen, J. -O.
   Hersman, B.
   Holmes, R.
   Huber, G. M.
   Hughes, E.
   Humensky, B.
   Incerti, S.
   Iodice, M.
   Jensen, S.
   Jiang, X.
   Jones, C.
   Jones, G.
   Jones, M.
   Jutier, C.
   Kamada, H.
   Ketikyan, A.
   Kominis, I.
   Korsch, W.
   Kramer, K.
   Kumar, K.
   Kumbartzki, G.
   Kuss, M.
   Lakuriqi, E.
   Laveissiere, G.
   Lerose, J. J.
   Liang, M.
   Liyanage, N.
   Lolos, G.
   Malov, S.
   Marroncle, J.
   McCormick, K.
   McKeown, R. D.
   Meziani, Z. -E.
   Michaels, R.
   Mitchell, J.
   Nogga, A.
   Pace, E.
   Papandreou, Z.
   Pavlin, T.
   Petratos, G. G.
   Pripstein, D.
   Prout, D.
   Ransome, R.
   Roblin, Y.
   Rowntree, D.
   Rvachev, M.
   Sabatie, F.
   Saha, A.
   Salme, G.
   Scopetta, S.
   Skibinski, R.
   Souder, P.
   Saito, T.
   Strauch, S.
   Suleiman, R.
   Takahashi, K.
   Teijiro, S.
   Todor, L.
   Tsubota, H.
   Ueno, H.
   Urciuoli, G.
   Van der Meer, R.
   Vernin, P.
   Voskanian, H.
   Witala, H.
   Wojtsekhowski, B.
   Xiong, F.
   Xu, W.
   Yang, J. -C.
   Zhang, B.
   Zolnierczuk, P.
TI He-3 spin-dependent cross sections and sum rules
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID VIRTUAL COMPTON-SCATTERING; MAGNETIC MOMENTS; FORM-FACTORS; NUCLEON;
   NEUTRON; DEUTERON; PROTON; ELECTROPRODUCTION; Q(2)-DEPENDENCE; ELECTRON
AB We present a measurement of the spin-dependent cross sections for the (3)(He) over right arrow((e) over right arrow ,e')X reaction in the quasielastic and resonance regions at a four-momentum transfer 0.1 <= Q(2)<= 0.9 GeV2. The spin-structure functions have been extracted and used to evaluate the nuclear Burkhardt-Cottingham and extended Gerasimov-Drell-Hearn sum rules for the first time. The data are also compared to an impulse approximation calculation and an exact three-body Faddeev calculation in the quasielastic region.
C1 [Gao, J.; Goldberg, E.; Hughes, E.; Jensen, S.; Jones, C.; McKeown, R. D.; Pavlin, T.; Pripstein, D.; Prout, D.] CALTECH, Pasadena, CA 91125 USA.
   [Yang, J. -C.] Chungnam Natl Univ, Taejon 305764, South Korea.
   [Gasparian, A.] Hampton Univ, Hampton, VA 23668 USA.
   [Berthot, J.; Bertin, P.; Deur, A.; DiSalvo, R.; Fonvieille, H.; Jutier, C.; Laveissiere, G.; Roblin, Y.] Univ Clermont Ferrand, CNRS, IN2P3, LPC, F-63170 Aubiere, France.
   [Gloeckle, W.] Ruhr Univ Bochum, Inst Theoret Phys 2, D-44780 Bochum, Germany.
   [Scopetta, S.] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy.
   [Salme, G.] Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy.
   [Cisbani, E.; Frullani, S.; Garibaldi, F.; Iodice, M.; Urciuoli, G.] Ist Nazl Fis Nucl, Sez Sanita, I-00161 Rome, Italy.
   [Pace, E.] Ist Nazl Fis Nucl, Sez Tor Vergata, I-00133 Rome, Italy.
   [Averett, T.; de Jager, C. W.; Deur, A.; Gilman, R.; Gomez, J.; Hansen, J. -O.; Kuss, M.; Lerose, J. J.; Liang, M.; Liyanage, N.; Michaels, R.; Mitchell, J.; Saha, A.; Van der Meer, R.; Wojtsekhowski, B.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
   [Petratos, G. G.; Suleiman, R.] Kent State Univ, Kent, OH 44242 USA.
   [Jones, C.; Korsch, W.; Zolnierczuk, P.] Univ Kentucky, Lexington, KY 40506 USA.
   [Nogga, A.] Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
   [Glamazdin, A.; Gorbenko, V.] Kharkov Inst Phys & Technol, UA-310108 Kharkov, Ukraine.
   [Kamada, H.] Kyushu Inst Technol, Fac Engn, Dept Phys, Kitakyushu, Fukuoka 8048550, Japan.
   [Golak, J.; Skibinski, R.; Witala, H.] Jagiellonian Univ, M Smoluchowski Inst Phys, PL-30059 Krakow, Poland.
   [Brown, D.] Univ Maryland, College Pk, MD 20742 USA.
   [Bertozzi, B.; Black, T.; Chai, Z.; Fissum, K.; Gao, H.; Gilad, S.; Liyanage, N.; Rowntree, D.; Rvachev, M.; Xiong, F.; Xu, W.; Zhang, B.] MIT, Cambridge, MA 02139 USA.
   [Kumar, K.] Univ Massachusetts, Amherst, MA 01003 USA.
   [Calarco, J.; Hersman, B.] Univ New Hampshire, Durham, NH 03824 USA.
   [Jutier, C.; McCormick, K.; Sabatie, F.; Todor, L.] Old Dominion Univ, Norfolk, VA 23529 USA.
   [Atti, C. Ciofi degli; Scopetta, S.] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy.
   [Cates, G.; Humensky, B.; Kominis, I.; Kumar, K.] Princeton Univ, Princeton, NJ 08544 USA.
   [Brash, E.; Huber, G. M.; Lolos, G.; Van der Meer, R.] Univ Regina, Regina, SK S4S 0A2, Canada.
   [Pace, E.] Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy.
   [Dieterich, S.; Glashausser, C.; Jiang, X.; Kumbartzki, G.; Malov, S.; Ransome, R.; Strauch, S.] Rutgers State Univ, Piscataway, NJ 08855 USA.
   [Burtin, E.; Marroncle, J.; Vernin, P.] CEA Saclay, IRFU, SPhN, F-91191 Gif Sur Yvette, France.
   [Holmes, R.; Souder, P.] Syracuse Univ, Syracuse, NY 13244 USA.
   [Slifer, K.; Auerbach, L.; Choi, Seonho; Incerti, S.; Lakuriqi, E.; Meziani, Z. -E.] Temple Univ, Philadelphia, PA 19122 USA.
   [Takahashi, K.; Teijiro, S.; Tsubota, H.; Ueno, H.] Tohoku Univ, Sendai, Miyagi 980, Japan.
   [Gao, H.] Duke Univ, Triangle Univ Nucl Lab, Durham, NC 27708 USA.
   [Averett, T.; Djawotho, P.; Finn, M.; Jones, M.; Kramer, K.] Coll William & Mary, Williamsburg, VA 23187 USA.
   [Amarian, M.; Ketikyan, A.; Voskanian, H.] Yerevan Phys Inst, Yerevan 375036, Armenia.
   [Slifer, K.; Cates, G.] Univ Virginia, Charlottesville, VA 22904 USA.
RP Slifer, K (reprint author), Univ Virginia, Charlottesville, VA 22904 USA.
RI Nogga, Andreas/A-3354-2008; Kominis, Iannis/C-5515-2011; Averett,
   Todd/A-2969-2011; Gao, Haiyan/G-2589-2011; Kuss, Michael/H-8959-2012;
   Sabatie, Franck/K-9066-2015; Cisbani, Evaristo/C-9249-2011
OI Nogga, Andreas/0000-0003-2156-748X; Sabatie, Franck/0000-0001-7031-3975;
   Cisbani, Evaristo/0000-0002-6774-8473
NR 39
TC 17
Z9 18
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 11
PY 2008
VL 101
IS 2
AR 022303
DI 10.1103/PhysRevLett.101.022303
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 324XW
UT WOS:000257553700013
PM 18764175
ER

PT J
AU Tamai, A
   Allan, MP
   Mercure, JF
   Meevasana, W
   Dunkel, R
   Lu, DH
   Perry, RS
   Mackenzie, AP
   Singh, DJ
   Shen, ZX
   Baumberger, F
AF Tamai, A.
   Allan, M. P.
   Mercure, J. F.
   Meevasana, W.
   Dunkel, R.
   Lu, D. H.
   Perry, R. S.
   Mackenzie, A. P.
   Singh, D. J.
   Shen, Z. -X.
   Baumberger, F.
TI Fermi surface and van hove singularities in the itinerant metamagnet
   Sr3Ru2O7
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID QUALITY SINGLE-CRYSTALS; QUANTUM CRITICALITY; RUTHENATE SR3RU2O7;
   STATES; INSTABILITY; ELECTRON; SR2RUO4; METALS
AB The low-energy electronic structure of the itinerant metamagnet Sr3Ru2O7 is investigated by angle-resolved photoemission and density-functional calculations. We find well-defined quasiparticle bands with resolution-limited linewidths and Fermi velocities up to an order of magnitude lower than in single layer Sr2RuO4. The complete topography, the cyclotron masses, and the orbital character of the Fermi surface are determined, in agreement with bulk sensitive de Haas-van Alphen measurements. An analysis of the d(xy) band dispersion reveals a complex density of states with van Hove singularities near the Fermi level, a situation which is favorable for magnetic instabilities.
C1 [Tamai, A.; Allan, M. P.; Mercure, J. F.; Mackenzie, A. P.; Baumberger, F.] Univ St Andrews, Sch Phys & Astron, Scottish Univ Phys Alliance, St Andrews KY16 9SS, Fife, England.
   [Meevasana, W.; Dunkel, R.; Lu, D. H.; Shen, Z. -X.] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA.
   [Meevasana, W.; Dunkel, R.; Lu, D. H.; Shen, Z. -X.] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
   [Meevasana, W.; Dunkel, R.; Lu, D. H.; Shen, Z. -X.] Stanford Univ, SSRL, Stanford, CA 94305 USA.
   [Perry, R. S.] Univ Edinburgh, Sch Phys, Scottish Univ Phys Alliance, Edinburgh EH9 3LZ, Midlothian, Scotland.
   [Perry, R. S.] Univ Edinburgh, Ctr Sci Extreme Condit, Edinburgh EH9 3LZ, Midlothian, Scotland.
   [Singh, D. J.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Tamai, A (reprint author), Univ St Andrews, Sch Phys & Astron, Scottish Univ Phys Alliance, St Andrews KY16 9SS, Fife, England.
EM anna.tamai@st-andrews.ac.uk
RI Tamai, Anna/B-9219-2014; Mackenzie, Andrew/K-6742-2015; Tamai,
   Anna/A-5166-2008; Baumberger, Felix/A-5170-2008; Allan,
   Milan/D-7763-2012; Singh, David/I-2416-2012
OI Tamai, Anna/0000-0001-5239-6826; Mercure,
   Jean-Francois/0000-0003-2620-9200; Baumberger,
   Felix/0000-0001-7104-7541; Allan, Milan/0000-0002-5437-1945; 
NR 27
TC 61
Z9 61
U1 2
U2 29
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 11
PY 2008
VL 101
IS 2
AR 026407
DI 10.1103/PhysRevLett.101.026407
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 324XW
UT WOS:000257553700046
PM 18764208
ER

PT J
AU Trigo, M
   Sheu, YM
   Arms, DA
   Chen, J
   Ghimire, S
   Goldman, RS
   Landahl, E
   Merlin, R
   Peterson, E
   Reason, M
   Reis, DA
AF Trigo, M.
   Sheu, Y. M.
   Arms, D. A.
   Chen, J.
   Ghimire, S.
   Goldman, R. S.
   Landahl, E.
   Merlin, R.
   Peterson, E.
   Reason, M.
   Reis, D. A.
TI Probing unfolded acoustic phonons with X rays
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DIFFRACTION; CRYSTALS; PULSES
AB Ultrafast laser excitation of an InGaAs/InAlAs superlattice (SL) creates coherent folded acoustic phonons that subsequently leak into the bulk (InP) substrate. Upon transmission, the phonons become "unfolded" into bulk modes and acquire a wave vector much larger than that of the light. We show that time-resolved x-ray diffraction is sensitive to this large-wave vector excitation in the substrate. Comparison with dynamical diffraction simulations of propagating strain supports our interpretation.
C1 [Trigo, M.; Sheu, Y. M.; Chen, J.; Ghimire, S.; Merlin, R.; Peterson, E.; Reis, D. A.] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
   [Arms, D. A.; Landahl, E.] Adv Photon Source, Argonne, IL 60439 USA.
   [Goldman, R. S.; Reason, M.] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA.
RP Trigo, M (reprint author), Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
EM mtrigo@umich.edu
RI Landahl, Eric/A-1742-2010; Goldman, Rachel/J-9091-2012; 
OI Merlin, Roberto/0000-0002-5584-0248
NR 17
TC 24
Z9 24
U1 1
U2 11
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 11
PY 2008
VL 101
IS 2
AR 025505
DI 10.1103/PhysRevLett.101.025505
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 324XW
UT WOS:000257553700035
PM 18764197
ER

PT J
AU Kline, KL
   Dale, VH
AF Kline, Keith L.
   Dale, Virginia H.
TI Biofuels: Effects on land and fire
SO SCIENCE
LA English
DT Letter
ID DEFORESTATION; DYNAMICS; AMAZON
C1 [Kline, Keith L.; Dale, Virginia H.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Kline, KL (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA.
RI Dale, Virginia/B-6023-2009; 
OI Kline, Keith/0000-0003-2294-1170
NR 10
TC 24
Z9 25
U1 1
U2 20
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
J9 SCIENCE
JI Science
PD JUL 11
PY 2008
VL 321
IS 5886
BP 199
EP 199
DI 10.1126/science.321.5886.199
PG 1
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 324IS
UT WOS:000257512900011
PM 18621653
ER

PT J
AU Mackelprang, R
   Rubin, EM
AF Mackelprang, Rachel
   Rubin, Edward M.
TI Paleontology - New tricks with old bones
SO SCIENCE
LA English
DT Editorial Material
ID NEANDERTHAL GENOMIC DNA; MODERN HUMANS; SELECTION; AMPLIFICATION;
   SEQUENCES; GENE
C1 [Mackelprang, Rachel; Rubin, Edward M.] Dept Energy Joint Genome Inst, Walnut Creek, CA 94598 USA.
   [Mackelprang, Rachel; Rubin, Edward M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Genom Div, Berkeley, CA 94720 USA.
RP Mackelprang, R (reprint author), Dept Energy Joint Genome Inst, 2800 Mitchell Dr, Walnut Creek, CA 94598 USA.
EM emrubin@lbl.gov
NR 16
TC 2
Z9 2
U1 1
U2 2
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
J9 SCIENCE
JI Science
PD JUL 11
PY 2008
VL 321
IS 5886
BP 211
EP 212
DI 10.1126/science.1161890
PG 2
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 324IS
UT WOS:000257512900028
PM 18621660
ER

PT J
AU Dreger, DS
   Ford, SR
   Walter, WR
AF Dreger, Douglas S.
   Ford, Sean R.
   Walter, William R.
TI Source analysis of the Crandall Canyon, Utah, mine collapse
SO SCIENCE
LA English
DT Article
C1 [Dreger, Douglas S.; Ford, Sean R.] Univ Calif Berkeley, Berkeley Seismol Lab, Berkeley, CA 94720 USA.
   [Ford, Sean R.; Walter, William R.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Dreger, DS (reprint author), Univ Calif Berkeley, Berkeley Seismol Lab, Berkeley, CA 94720 USA.
EM dreger@seismo.berkeley.edu
RI Walter, William/C-2351-2013; Ford, Sean/F-9191-2011
OI Walter, William/0000-0002-0331-0616; Ford, Sean/0000-0002-0376-5792
NR 5
TC 9
Z9 9
U1 1
U2 6
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
J9 SCIENCE
JI Science
PD JUL 11
PY 2008
VL 321
IS 5886
BP 217
EP 217
DI 10.1126/science.1157392
PG 1
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 324IS
UT WOS:000257512900030
PM 18621662
ER

PT J
AU Seo, HJ
   Eisenstein, DJ
   Zehavi, I
AF Seo, Hee-Jong
   Eisenstein, Daniel J.
   Zehavi, Idit
TI Passive evolution of galaxy clustering
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies : clusters : general; methods : n-body simulations
ID HALO OCCUPATION DISTRIBUTION; LUMINOUS RED GALAXIES; DARK-MATTER HALOES;
   DIGITAL SKY SURVEY; MICROWAVE BACKGROUND ANISOTROPIES; LARGE-SCALE
   STRUCTURE; SATELLITE GALAXIES; POWER SPECTRUM; SUBHALO POPULATIONS;
   RADIAL-DISTRIBUTION
AB We present a numerical study of the evolution of galaxy clustering when galaxies flow passively from high redshift, respecting the continuity equation throughout. While passive flow is a special case of galaxy evolution, it allows a well-defined study of galaxy ancestry and serves as an interesting limit to be compared to nonpassive cases. We use dissipationless N-body simulations, assign galaxies to massive halos at z = 1 and 2 using various halo occupation distribution (HOD) models, and trace these galaxy particles to lower redshift while conserving their number. We find that passive flow results in an asymptotic convergence at low redshift in the HOD and in galaxy clustering on scales above similar to 3 h(-1) Mpc for a wide range of initial HODs. As galaxies become less biased with respect to mass asymptotically with time, the HOD parameters evolve such that M-1/M-min decreases while alpha converges toward unity, where < N-g(M)> = exp(-M-min/M)[1 + (M/M-1)(alpha)]. The satellite populations converge toward the Poisson distribution at low redshift. The convergence is robust for different number densities and is enhanced when galaxies evolve from higher redshift. We compare our results with the observed luminous red galaxy (LRG) sample from SDSS that has the same number density. We claim that if LRGs have experienced a strict passive flow, their < N-g(M)> should be close to a power law with an index of unity in halo mass. Discrepancies could be due to dry galaxy merging or new members arising between the initial and the final redshifts. The spatial distribution of passively flowing galaxies within halos appears on average more concentrated than the halo mass profile at low redshift. The evolution of bias for passively flowing galaxies is consistent with linear bias evolution on quasi-linear as well as large scales.
C1 [Seo, Hee-Jong; Eisenstein, Daniel J.] Univ Arizona, Steward Observ, Tucson, AZ 85121 USA.
   [Seo, Hee-Jong] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
   [Zehavi, Idit] Case Western Reserve Univ, Cleveland, OH 44106 USA.
RP Seo, HJ (reprint author), Univ Arizona, Steward Observ, Tucson, AZ 85121 USA.
EM sheejong@fnal.gov; deisenstein@as.arizona.edu;
   izehavi@abacus.astr.cwru.edu
NR 78
TC 13
Z9 13
U1 0
U2 2
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JUL 10
PY 2008
VL 681
IS 2
BP 998
EP 1016
DI 10.1086/527553
PG 19
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 324JX
UT WOS:000257516000019
ER

PT J
AU Jordan, GC
   Fisher, RT
   Townsley, DM
   Calder, AC
   Graziani, C
   Asida, S
   Lamb, DQ
   Truran, JW
AF Jordan, G. C.
   Fisher, R. T.
   Townsley, D. M.
   Calder, A. C.
   Graziani, C.
   Asida, S.
   Lamb, D. Q.
   Truran, J. W.
TI Three-dimensional simulations of the deflagration phase of the
   gravitationally confined detonation model of Type Ia supernovae
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE hydrodynamics; nuclear reactions; nucleosynthesis; abundances;
   supernovae : general; white dwarfs
ID FLUID DYNAMICAL SIMULATIONS; SUBGRID SCALE-MODEL; OFF-CENTER IGNITION;
   DELAYED-DETONATION; THERMONUCLEAR SUPERNOVAE; WHITE-DWARFS; FLAMES;
   EXPLOSION; EVOLUTION; ASTROPHYSICS
AB We report the results of a series of three-dimensional ( 3D) simulations of the deflagration phase of the gravitationally confined detonation mechanism for Type Ia supernovae. In this mechanism, ignition occurs at one or several off-center points, resulting in a burning bubble of hot ash that rises rapidly, breaks through the surface of the star, and collides at a point opposite the breakout on the stellar surface. We find that detonation conditions are robustly reached in our 3D simulations for a range of initial conditions and resolutions. Detonation conditions are achieved as the result of an inwardly directed jet that is produced by the compression of unburnt surface material when the surface flow collides with itself. A high-velocity outwardly directed jet is also produced. The initial conditions explored in this paper lead to conditions at detonation that can be expected to produce large amounts of (56)Ni and small amounts of intermediate-mass elements. These particular simulations are therefore relevant only to high-luminosity Type Ia supernovae. Recent observations of Type Ia supernovae imply a compositional structure that is qualitatively consistent with that expected from these simulations.
C1 [Jordan, G. C.; Fisher, R. T.; Calder, A. C.; Graziani, C.; Lamb, D. Q.; Truran, J. W.] Univ Chicago, Ctr Astrophys Thermonucl Flashes, Chicago, IL 60637 USA.
   [Jordan, G. C.; Fisher, R. T.; Townsley, D. M.; Calder, A. C.; Graziani, C.; Lamb, D. Q.; Truran, J. W.] Univ Chicago, Ctr Astron & Astrophys, Chicago, IL 60637 USA.
   [Townsley, D. M.] Univ Chicago, Joint Inst Nucl Astrophys, Chicago, IL 60637 USA.
   [Asida, S.] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel.
   [Lamb, D. Q.; Truran, J. W.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
   [Truran, J. W.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Jordan, GC (reprint author), Univ Chicago, Ctr Astrophys Thermonucl Flashes, Chicago, IL 60637 USA.
RI Calder, Alan/E-5348-2011; Fisher, Robert/J-8667-2014
OI Fisher, Robert/0000-0001-8077-7255
NR 39
TC 69
Z9 69
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JUL 10
PY 2008
VL 681
IS 2
BP 1448
EP 1457
DI 10.1086/588269
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 324JX
UT WOS:000257516000054
ER

PT J
AU Lai, DK
   Bolte, M
   Johnson, JA
   Lucatello, S
   Heger, A
   Woosley, SE
AF Lai, David K.
   Bolte, Michael
   Johnson, Jennifer A.
   Lucatello, Sara
   Heger, Alexander
   Woosley, S. E.
TI Detailed abundances for 28 metal-poor stars: Stellar relics in the milky
   way
SO ASTROPHYSICAL JOURNAL
LA English
DT Review
DE nuclear reactions, nucleosynthesis, abundances; stars : abundances;
   stars : Population II; supernovae : general
ID EXPERIMENTAL OSCILLATOR-STRENGTHS; NEUTRON-CAPTURE ELEMENTS;
   HIGH-DISPERSION-SPECTROGRAPH; EFFECTIVE TEMPERATURE SCALE; KECK PILOT
   PROGRAM; R-PROCESS; 1ST STARS; EARLY GALAXY; TRANSITION-PROBABILITIES;
   GIANT STARS
AB We present the results of an abundance analysis for a sample of stars with -4 < [Fe/H] < -2. The data were obtained with the HIRES spectrograph at Keck Observatory. The set includes 28 stars, with effective temperature ranging from 4800 to 6600 K. For 13 stars with [Fe/H] < -2.6, including nine with [Fe/H] < -3.0 and one with [Fe/H] = -4.0, these are the first reported detailed abundances. For the most metal-poor star in our sample, CS 30336-049, we measure an abundance pattern that is very similar to stars in the range [Fe/H] similar to -3.5, including a normal C + N abundance. We also find that it has very low but measurable Sr and Ba, indicating some neutron-capture activity even at this low of a metallicity. We explore this issue further by examining other very neutron capture-deficient stars and find that, at the lowest levels, [Ba/Sr] exhibits the ratio of the main r-process. We also report on a new r-process-enhanced star, CS 31078-018. This star has [Fe/H] = -2.85, [Eu/Fe] = 1.23, and [Ba/Eu] - -0.51. CS 31078-018 exhibits an "actinide boost,'' i. e., much higher [Th/Eu] than expected and at a similar level to CS 31082 001. Our spectra allow us to further constrain the abundance scatter at low metallicities, which we then use to fit to the zero-metallicity Type II supernova yields of Heger & Woosley (2008). We find that supernovae with progenitor masses between 10 and 20 M-circle dot provide the best matches to our abundances.
C1 [Lai, David K.; Bolte, Michael; Heger, Alexander; Woosley, S. E.] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
   [Johnson, Jennifer A.] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
   [Lucatello, Sara] Osserv Astron Padova, I-35122 Padua, Italy.
   [Lucatello, Sara] Tech Univ Munich, D-85748 Garching, Germany.
   [Heger, Alexander] Los Alamos Natl Lab, Theoret Astrophys Grp, Los Alamos, NM 87545 USA.
RP Lai, DK (reprint author), Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
EM david@ucolick.org; bolte@ucolick.org; jaj@astronomy.ohio-state.edu;
   sara.lucatello@oapd.inaf.it; alex@ucolick.org; woosley@ucolick.org
NR 107
TC 168
Z9 168
U1 0
U2 6
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JUL 10
PY 2008
VL 681
IS 2
BP 1524
EP 1556
DI 10.1086/588811
PG 33
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 324JX
UT WOS:000257516000060
ER

PT J
AU Moskalenko, IV
   Porter, TA
   Digel, SW
   Michelson, PF
AF Moskalenko, Igor V.
   Porter, Troy A.
   Digel, Seth W.
   Michelson, Peter F.
TI A celestial gamma-ray foreground due to the albedo of small solar system
   bodies and a remote probe of the interstellar cosmic-ray spectrum
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE cosmic rays; elementary particles; Galaxy : bulge; gamma rays : theory;
   Kuiper Belt; minor planets, asteroids
ID MAIN-BELT ASTEROIDS; SIZE DISTRIBUTION; KUIPER-BELT; TROJAN ASTEROIDS;
   ANNIHILATION EMISSION; EGRET OBSERVATIONS; SKY DISTRIBUTION; MILKY-WAY;
   OBJECTS; MODEL
AB We calculate the gamma-ray albedo flux from cosmic-ray (CR) interactions with the solid rock and ice in Main Belt asteroids (MBAs), Jovian and Neptunian Trojan asteroids, and Kuiper Belt objects (KBOs) using the Moon as a template. We show that the gamma-ray albedo for the MainBelt, Trojans, and Kuiper Belt strongly depends on the small-body size distribution of each system. Based on an analysis of the Energetic Gamma-Ray Experiment Telescope (EGRET) data we infer that the diffuse emission from the MBAs, Trojans, and KBOs has an integrated flux of less than similar to 6 x 10(-6) cm(-2) s(-1) (100-500 MeV), which corresponds to similar to 12 times the lunar albedo, and may be detectable by the forthcoming Gamma-Ray Large Area Space Telescope (GLAST). If detected by GLAST, it can provide unique direct information about the number of small bodies in each system that is difficult to assess by any other method. In addition, the KBO albedo flux can be used to probe the spectrum of CR nuclei at close-to-interstellar conditions. The orbits of MBAs, Trojans, and KBOs are distributed near the ecliptic, which passes through the Galactic center and high Galactic latitudes. Therefore, the asteroid gamma-ray albedo has to be taken into account when analyzing weak gamma-ray sources close to the ecliptic, especially near the Galactic center, and signals at high Galactic latitudes, such as the extragalactic gamma-ray emission. The asteroid albedo spectrum also exhibits a 511 keV line due to secondary positrons annihilating in the rock. This may be an important and previously unrecognized celestial foreground for the International Gamma-Ray Astrophysics Laboratory (INTEGRAL) observations of the Galactic 511 keV line emission including the direction of the Galactic center.
C1 [Moskalenko, Igor V.] Stanford Univ, Hansen Expt Phys Lab, Stanford, CA 94305 USA.
   [Porter, Troy A.] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA.
   [Digel, Seth W.] Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
   [Michelson, Peter F.] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
RP Moskalenko, IV (reprint author), Stanford Univ, Hansen Expt Phys Lab, Stanford, CA 94305 USA.
EM imos@stanford.edu; tporter@scipp.ucsc.edu; digel@stanford.edu;
   peterm@stanford.edu
RI Moskalenko, Igor/A-1301-2007
OI Moskalenko, Igor/0000-0001-6141-458X
NR 60
TC 8
Z9 8
U1 0
U2 3
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JUL 10
PY 2008
VL 681
IS 2
BP 1708
EP 1716
DI 10.1086/588425
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 324JX
UT WOS:000257516000078
ER

PT J
AU Nakagawa, YE
   Sakamoto, T
   Sato, G
   Gehrels, N
   Hurley, K
   Palmer, DM
AF Nakagawa, Y. E.
   Sakamoto, T.
   Sato, G.
   Gehrels, N.
   Hurley, K.
   Palmer, D. M.
TI The swift discovery of X-ray afterglows accompanying short bursts from
   SGR 1900+14
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE pulsars : individual (SGR 1900+14); stars : neutron
ID SGR 1900+14; GIANT FLARE; EMISSION; SGR-1806-20; GALAXY; GRB-050709;
   TELESCOPE; MAGNETARS; OUTBURST; MISSION
AB The discovery of X-ray afterglows accompanying two short bursts from SGR 1900+ 14 is presented. The afterglow luminosities at the end of each observation are lower by 30%-50% than their initial luminosities, and decay with power-law indices p similar to 0.2-0.4. Their initial bolometric luminosities are L similar to 10(34)-10(35) erg s(-1). We discuss analogies and differences between the X-ray afterglows of SGR short bursts and short gamma-ray bursts.
C1 [Nakagawa, Y. E.] Aoyama Gakuin Univ, Grad Sch Sci & Engn, Kanagawa 2298558, Japan.
   [Nakagawa, Y. E.] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan.
   [Sakamoto, T.; Sato, G.; Gehrels, N.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Sakamoto, T.] Univ Maryland, Baltimore, MD 21250 USA.
   [Hurley, K.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
   [Palmer, D. M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Nakagawa, YE (reprint author), Aoyama Gakuin Univ, Grad Sch Sci & Engn, Kanagawa 2298558, Japan.
RI Gehrels, Neil/D-2971-2012
NR 37
TC 2
Z9 2
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD JUL 10
PY 2008
VL 681
IS 2
BP L89
EP L92
DI 10.1086/590428
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 326LY
UT WOS:000257661900010
ER

PT J
AU Rest, A
   Welch, DL
   Suntzeff, NB
   Oaster, L
   Lanning, H
   Olsen, K
   Smith, RC
   Becker, AC
   Bergmann, M
   Challis, P
   Clocchiatti, A
   Cook, KH
   Damke, G
   Garg, A
   Huber, ME
   Matheson, T
   Minniti, D
   Prieto, JL
   Wood-Vasey, WM
AF Rest, A.
   Welch, D. L.
   Suntzeff, N. B.
   Oaster, L.
   Lanning, H.
   Olsen, K.
   Smith, R. C.
   Becker, A. C.
   Bergmann, M.
   Challis, P.
   Clocchiatti, A.
   Cook, K. H.
   Damke, G.
   Garg, A.
   Huber, M. E.
   Matheson, T.
   Minniti, D.
   Prieto, J. L.
   Wood-Vasey, W. M.
TI Scattered-light echoes from the historical galactic supernovae
   Cassiopeia A and Tycho (SN 1572)
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE ISM : individual (Cassiopeia A, Tycho); supernova remnants; supernovae :
   general
ID LARGE-MAGELLANIC-CLOUD; X-RAY-SPECTRUM; IA SUPERNOVAE; REMNANT
AB We report the discovery of an extensive system of scattered-light echo arclets associated with the recent supernovae in the local neighborhood of the Milky Way: Tycho (SN 1572) and Cassiopeia A. Existing work suggests that the Tycho SN was a thermonuclear explosion while the Cas A supernova was a core-collapse explosion. Precise classifications according to modern nomenclature require spectra of the outburst light. In the case of ancient SNe, this can only be done with spectroscopy of their light echo, where the discovery of the light echoes from the outburst light is the first step. Adjacent light echo positions suggest that Cas A and Tycho may share common scattering dust structures. If so, it is possible to measure precise distances between historical Galactic supernovae. Ongoing surveys that alert on the development of bright scattered-light echo features have the potential to reveal detailed spectroscopic information for many recent Galactic supernovae, both directly visible and obscured by dust in the Galactic plane.
C1 [Rest, A.; Smith, R. C.; Damke, G.] Natl Opt Astron Observ, Cerro Tololo Inter Amer Observ, La Serena, Chile.
   [Rest, A.; Garg, A.] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
   [Welch, D. L.; Oaster, L.] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada.
   [Suntzeff, N. B.] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA.
   [Lanning, H.; Olsen, K.; Matheson, T.] Natl Opt Astron Observ, Tucson, AZ 85719 USA.
   [Becker, A. C.] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
   [Bergmann, M.] Gemini Observ, La Serena, Chile.
   [Challis, P.; Wood-Vasey, W. M.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
   [Clocchiatti, A.; Minniti, D.] Pontificia Univ Catolica Chile, Dept Astron, Santiago 22, Chile.
   [Cook, K. H.; Huber, M. E.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   [Huber, M. E.] Johns Hopkins Univ, Baltimore, MD 21218 USA.
   [Prieto, J. L.] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
RP Rest, A (reprint author), Natl Opt Astron Observ, Cerro Tololo Inter Amer Observ, Colina El Pino S-N, La Serena, Chile.
NR 23
TC 43
Z9 44
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD JUL 10
PY 2008
VL 681
IS 2
BP L81
EP L84
DI 10.1086/590427
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 326LY
UT WOS:000257661900008
ER

PT J
AU Xu, H
   Li, H
   Collins, D
   Li, S
   Norman, ML
AF Xu, H.
   Li, H.
   Collins, D.
   Li, S.
   Norman, M. L.
TI Formation of X-ray cavities by the magnetically dominated jet-lobe
   system in a galaxy cluster
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE galaxies : active; galaxies : clusters : general; galaxies : jets;
   methods : numerical; MHD
ID ACTIVE GALACTIC NUCLEI; DOUBLE RADIO-SOURCES; COOLING FLOWS;
   INTRACLUSTER MEDIUM; CHANDRA OBSERVATION; PERSEUS CLUSTER; HYDRA-A;
   BUBBLES; ATMOSPHERES; FEEDBACK
AB We present cosmological magnetohydrodynamic simulations of the formation of a galaxy cluster with magnetic energy feedback from an active galactic nuclei (AGNs). We demonstrate that X-ray cavities can be produced by the magnetically dominated jet-lobe system that is supported by a central axial current. The cavities are magnetically dominated, and their morphology is determined jointly by the magnetic fields and the background cluster pressure profile. The expansion and motion of the cavities are driven initially by the Lorentz force of the magnetic fields, and the cavities only become buoyant at late stages (>500 Myr). We find that up to 80%-90% of the injected magnetic energy goes into doing work against the hot cluster medium, heating it, and lifting it in the cluster potential.
C1 [Xu, H.; Collins, D.; Norman, M. L.] Univ Calif San Diego, Ctr Astrophys & Space Sci, La Jolla, CA 92093 USA.
   [Xu, H.; Li, H.; Li, S.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Xu, H (reprint author), Univ Calif San Diego, Ctr Astrophys & Space Sci, 9500 Gilman Dr, La Jolla, CA 92093 USA.
RI Xu, Hao/B-8734-2014
OI Xu, Hao/0000-0003-4084-9925
NR 30
TC 13
Z9 13
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD JUL 10
PY 2008
VL 681
IS 2
BP L61
EP L64
DI 10.1086/590407
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 326LY
UT WOS:000257661900003
ER

PT J
AU Luo, WF
   Cowgill, D
   Causey, R
   Stewart, K
AF Luo, Weifang
   Cowgill, Don
   Causey, Rion
   Stewart, Ken
TI Equilibrium isotope effects in the preparation and isothermal
   decomposition of ternary hydrides Pd(H(x)D(1-x))(y) (0 < x < 1 and y >
   0.6)
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID SLOPING PLATEAUS; INTERMETALLIC HYDRIDES; PALLADIUM; HYDROGEN; SYSTEMS;
   ALLOYS
AB A Sieverts' apparatus coupled with a residual gas analysis is used to measure the concentration variations of hydrogen isotopes in the gas and solid phases during exchange and isothermal decomposition of mixed hydrides. beta-phase palladium hydrides with known ratios of H:D, Pd(H(x)D(1-x))(y), (0 < x < 1, y > 0.6), are prepared by H(2) with PdD(y) or D(2) with PdH(y) exchange, and their desorption isotherms are reported here at 323 K. A higher equilibrium pressure in isothermal desorption of mixed hydrides is associated with a higher ratio of D/H in the initial mixed hydrides in beta-phase. The composition of the gas desorbed from a mixed hydride varies; i.e., the ratio of D/H in gas decreases with the sum of (H + D) in Pd. The values of the separation factor alpha during desorption at 323 K and during H-D exchange at 248 K are discussed and compared with those in the literature. Desorption isotherms of mixed isotope hydrides are between those of the single isotope hydrides of H-Pd and D-Pd, however, plateaus slope more than those of pure isotope hydrides. The origin of the plateau sloping in the mixed hydrides can be attributed to the compositional variations during desorption, i.e., the equilibrium pressure is greater when D/H ratio in solid is greater. A simple model is proposed in this study that agrees well with experimental results.
C1 [Luo, Weifang; Cowgill, Don; Causey, Rion; Stewart, Ken] Sandia Natl Labs, Dept Hydrogen & Met Sci, Livermore, CA 94551 USA.
RP Luo, WF (reprint author), Sandia Natl Labs, Dept Hydrogen & Met Sci, 7011 E Ave, Livermore, CA 94551 USA.
EM wluo@sandia.gov
NR 18
TC 10
Z9 10
U1 1
U2 8
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD JUL 10
PY 2008
VL 112
IS 27
BP 8099
EP 8105
DI 10.1021/jp801487n
PG 7
WC Chemistry, Physical
SC Chemistry
GA 321VS
UT WOS:000257335200018
PM 18553963
ER

PT J
AU Chapman, KW
   Chupas, PJ
   Winans, RE
   Pugmire, RJ
AF Chapman, Karena W.
   Chupas, Peter J.
   Winans, Randall E.
   Pugmire, Ronald J.
TI High pressure pair distribution function studies of Green River oil
   shale
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID X-RAY-SCATTERING; HIGH-TEMPERATURE; REFINEMENT; MUSCOVITE; EQUATION;
   ALBITE; STATE
AB The compression behavior of a silicate-rich oil shale from the Green River formation in the pressure range 0.0-2.4 GPa was studied using in situ high pressure X-ray pair distribution function (PDF) measurements for the sample contained within a Paris-Edinburgh cell. The real-space local structural information in the PDF, G(r), was used to evaluate the compressibility of the oil shale. Specifically, the pressure-induced reduction in the medium- to long-range atom distances (similar to 6-20 angstrom) yielded an average sample compressibility corresponding to a bulk modulus of ca. 61-67 GPa. A structural model consisting of a three phase mixture of the principal crystalline oil shale. components (quartz, albite and Illite) provided a good fit to the ambient pressure PDF data (R similar to 30.7%). Indeed the features in the PDF beyond similar to 6 angstrom, were similarly well fit by a single phase model of the highest symmetry, highly crystalline quartz component. The factors influencing the observed compression behavior are discussed.
C1 [Chapman, Karena W.; Chupas, Peter J.; Winans, Randall E.] Argonne Natl Lab, Xray Sci Div, Adv Photon Source, Argonne, IL 60439 USA.
   [Pugmire, Ronald J.] Univ Utah, Dept Chem Engn, Salt Lake City, UT 84112 USA.
   [Pugmire, Ronald J.] Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA.
RP Chapman, KW (reprint author), Argonne Natl Lab, Xray Sci Div, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM chapmank@aps.anl.gov
RI Chapman, Karena/G-5424-2012
NR 29
TC 1
Z9 1
U1 0
U2 12
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD JUL 10
PY 2008
VL 112
IS 27
BP 9980
EP 9982
DI 10.1021/jp803900s
PG 3
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 321VT
UT WOS:000257335300005
ER

PT J
AU Lorenz, CD
   Crozier, PS
   Anderson, JA
   Travesset, A
AF Lorenz, Christian D.
   Crozier, Paul S.
   Anderson, Joshua A.
   Travesset, Alex
TI Molecular dynamics of ionic transport and electrokinetic effects in
   realistic silica channels
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID WATER INTERFACE; FORCE-FIELD; ELECTROLYTE-SOLUTIONS; POISEUILLE FLOW;
   CRYSTAL VIOLET; SILANOL GROUPS; CHARGE; SURFACES; ADSORPTION; SIMULATION
AB Silica is one of the most widely used inorganic materials in experiments and applications involving aqueous solutions of biomolecules, nanoparticles, etc. In this paper, we construct a detailed atomistic model of a silica interface that captures the essential experimentally known properties of a silica interface. We then perform all-atom molecular dynamics simulations of a silica nanochannel subjected to either an external pressure or an electric field and provide an atomistic description of ionic transport and both electro-osmotic flow and strean-tin- currents for a solution of monovalent (0.4 M NaCl) as well as divalent (0.2 and 1.0 M CaCl (2)) salts. Our results allow a detailed investigation of zeta-potentials, Stern layer conductance, charge inversion, ionic mobilities, as well as continuum theories and Onsager relations. We con clude with a discussion on the implications of our results for silica nanopore experiments and micro- and nanofluidic devices.
C1 [Lorenz, Christian D.] Kings Coll London, Mat Res Grp, Dept Mech Engn, London WC2R 2LS, England.
   [Crozier, Paul S.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
   Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
   Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
RP Lorenz, CD (reprint author), Kings Coll London, Mat Res Grp, Dept Mech Engn, London WC2R 2LS, England.
EM chris.lorenz@kcl.ac.uk
RI Anderson, Joshua/H-4262-2011; Lorenz, Christian/A-6996-2017
OI Lorenz, Christian/0000-0003-1028-4804
NR 52
TC 59
Z9 59
U1 3
U2 41
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD JUL 10
PY 2008
VL 112
IS 27
BP 10222
EP 10232
DI 10.1021/jp711510k
PG 11
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 321VT
UT WOS:000257335300041
ER

PT J
AU Singal, J
AF Singal, Jack
TI The CMB and galactic microwave absolute spectrum: Science and measuren
   ARCADE 2
SO MODERN PHYSICS LETTERS A
LA English
DT Review
DE astrophysics; cosmology; cosmic microwave background; microwave
   instrumentation; radiometers
ID EMISSION; GHZ; TEMPERATURE; UNIVERSE; SKY
AB Beyond spatial anisotropy and polarization, a third type of structure in the Cosmic Microwave Background radiation, that of deviations in the overall absolute intensity versus frequency spectrum from a blackbody form, encodes additional important cosmological and astrophysical information, and remains inconclusively studied. This article discusses the ARCADE 2 project, the current balloon-based experimental effort to measure the absolute radiometric temperature of the CMB and Galactic microwave emission in the range from 3 to 90 GHz.
C1 Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
RP Singal, J (reprint author), Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford Linear Accelerator Ctr, 2757 Sand Hill Rd, Menlo Pk, CA 94025 USA.
EM jsingal@stanford.edu
NR 26
TC 1
Z9 1
U1 0
U2 1
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0217-7323
J9 MOD PHYS LETT A
JI Mod. Phys. Lett. A
PD JUL 10
PY 2008
VL 23
IS 21
BP 1719
EP 1733
DI 10.1142/S0217732308027485
PG 15
WC Physics, Nuclear; Physics, Particles & Fields; Physics, Mathematical
SC Physics
GA 335LN
UT WOS:000258292200001
ER

PT J
AU Sebastian, SE
   Harrison, N
   Palm, E
   Murphy, TP
   Mielke, CH
   Liang, RX
   Bonn, DA
   Hardy, WN
   Lonzarich, GG
AF Sebastian, Suchitra E.
   Harrison, N.
   Palm, E.
   Murphy, T. P.
   Mielke, C. H.
   Liang, Ruixing
   Bonn, D. A.
   Hardy, W. N.
   Lonzarich, G. G.
TI A multi-component Fermi surface in the vortex state of an underdoped
   high-T-c superconductor
SO NATURE
LA English
DT Article
ID QUANTUM OSCILLATIONS; PHASE
AB To understand the origin of superconductivity, it is crucial to ascertain the nature and origin of the primary carriers available to participate in pairing(1-6). Recent quantum oscillation experiments on high- transition- temperature ( high- T-c) copper oxide superconductors(7-10) have revealed the existence of a Fermi surface akin to that in normal metals, comprising fermionic carriers that undergo orbital quantization(11). The unexpectedly small size of the observed carrier pocket, however, leaves open a variety of possibilities for the existence or form of any underlying magnetic order, and its relation to d- wave superconductivity(12-15). Here we report experiments on quantum oscillations in the magnetization ( the de Haas- van Alphen effect) in superconducting YBa2Cu3O6.51 that reveal more than one carrier pocket. In particular, we find evidence for the existence of a much larger pocket of heavier mass carriers playing a thermodynamically dominant role in this hole- doped superconductor. Importantly, characteristics of the multiple pockets within this more complete Fermi surface impose constraints on the wavevector of any underlying order and the location of the carriers in momentum space. These constraints enable us to construct a possible density- wave model with spiral or related modulated magnetic order, consistent with experimental observations.
C1 [Sebastian, Suchitra E.; Lonzarich, G. G.] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England.
   [Harrison, N.; Mielke, C. H.] Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA.
   [Palm, E.; Murphy, T. P.] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA.
   [Liang, Ruixing; Bonn, D. A.; Hardy, W. N.] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z4, Canada.
   [Liang, Ruixing; Bonn, D. A.; Hardy, W. N.] Canadian Inst Adv Res, Toronto, ON M5G 1Z8, Canada.
RP Sebastian, SE (reprint author), Univ Cambridge, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 0HE, England.
EM suchitra@phy.cam.ac.uk
RI Mielke, Charles/S-6827-2016; 
OI Mielke, Charles/0000-0002-2096-5411; Harrison, Neil/0000-0001-5456-7756
NR 31
TC 176
Z9 179
U1 4
U2 41
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
J9 NATURE
JI Nature
PD JUL 10
PY 2008
VL 454
IS 7201
BP 200
EP 203
DI 10.1038/nature07095
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 323RU
UT WOS:000257466900040
PM 18615081
ER

PT J
AU Niu, FL
   Silver, PG
   Daley, TM
   Cheng, X
   Majer, EL
AF Niu, Fenglin
   Silver, Paul G.
   Daley, Thomas M.
   Cheng, Xin
   Majer, Ernest L.
TI Preseismic velocity changes observed from active source monitoring at
   the Parkfield SAFOD drill site
SO NATURE
LA English
DT Article
ID SAN-ANDREAS FAULT; COMPRESSIONAL WAVES; SEISMIC VELOCITY; ECHO SIGNALS;
   TRAVEL-TIME; ROCKS; STRESS; CALIFORNIA; CRACKS
AB Measuring stress changes within seismically active fault zones has been a long- sought goal of seismology. One approach is to exploit the stress dependence of seismic wave velocity, and we have investigated this in an active source cross- well experiment at the San Andreas Fault Observatory at Depth ( SAFOD) drill site. Here we show that stress changes are indeed measurable using this technique. Over a two- month period, we observed an excellent anti-correlation between changes in the time required for a shear wave to travel through the rock along a fixed pathway ( a few microseconds) and variations in barometric pressure. We also observed two large excursions in the travel- time data that are coincident with two earthquakes that are among those predicted to produce the largest coseismic stress changes at SAFOD. The two excursions started approximately 10 and 2 hours before the events, respectively, suggesting that they may be related to pre- rupture stress induced changes in crack properties, as observed in early laboratory studies(1,2).
C1 [Niu, Fenglin; Cheng, Xin] Rice Univ, Dept Earth Sci, Houston, TX 77005 USA.
   [Silver, Paul G.] Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC 20015 USA.
   [Daley, Thomas M.; Majer, Ernest L.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Niu, FL (reprint author), Rice Univ, Dept Earth Sci, MS-126,6100 Main St, Houston, TX 77005 USA.
EM niu@rice.edu
RI Niu, Fenglin/A-2548-2011; Cheng, Xin/C-2973-2011; Daley,
   Thomas/G-3274-2015
OI Daley, Thomas/0000-0001-9445-0843
NR 20
TC 63
Z9 95
U1 2
U2 18
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
EI 1476-4687
J9 NATURE
JI Nature
PD JUL 10
PY 2008
VL 454
IS 7201
BP 204
EP U44
DI 10.1038/nature07111
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 323RU
UT WOS:000257466900041
PM 18615082
ER

PT J
AU Gorton, I
   Liu, Y
   Trivedi, N
AF Gorton, Ian
   Liu, Yan
   Trivedi, Nihar
TI An extensible and lightweight architecture for adaptive server
   applications
SO SOFTWARE-PRACTICE & EXPERIENCE
LA English
DT Article
DE adaptive; server applications; autonomic computing; components;
   performance
AB Server applications augmented with behavioral adaptation logic can react to environmental changes, creating self-managing server applications with improved quality of service at runtime. However, developing adaptive server applications is challenging due to the complexity of the underlying server technologies and highly dynamic application environments. This paper presents an architecture framework, the Adaptive Server Framework (ASF), to facilitate the development of adaptive behavior for legacy server applications. ASF provides a clear separation between the implementation of adaptive behavior and the business logic of the server application. This means a server application can be extended with programmable adaptive features through the definition and implementation of control components defined in ASE Furthermore, ASF is a lightweight architecture in that it incurs low CPU overhead and memory usage. We demonstrate the effectiveness of ASF through a case study, in which a server application dynamically determines the resolution and quality to scale an image based on the load of the server and network connection speed. The experimental evaluation demonstrates the performance gains possible by adaptive behavior and the low overhead introduced by ASE Copyright (c) 2007 John Wiley & Sons, Ltd.
C1 [Liu, Yan] Natl ICT Australia Ltd, Alexandria, NSW, Australia.
   [Gorton, Ian] Pacific NW Natl Lab, Richland, WA 99352 USA.
   [Trivedi, Nihar] Univ Sydney, Sch Informat Technol, Sydney, NSW 2006, Australia.
RP Liu, Y (reprint author), Natl ICT Australia Ltd, Australian Technol Pk,Garden St, Alexandria, NSW, Australia.
EM jenny.liu@nicta.com.au
RI Gorton, Ian/A-8247-2009
NR 18
TC 0
Z9 0
U1 0
U2 2
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0038-0644
EI 1097-024X
J9 SOFTWARE PRACT EXPER
JI Softw.-Pract. Exp.
PD JUL 10
PY 2008
VL 38
IS 8
BP 853
EP 883
DI 10.1002/spe.857
PG 31
WC Computer Science, Software Engineering
SC Computer Science
GA 321YA
UT WOS:000257341200004
ER

PT J
AU Rodriguez, S
   Kunde, YA
   McCleskey, TM
   Hong-Geller, E
AF Rodriguez, Shannan
   Kunde, Yuliya A.
   McCleskey, T. Mark
   Hong-Geller, Elizabeth
TI Upregulation of I-CAM1 in response to beryllium exposure in small airway
   epithelial cells
SO TOXICOLOGY LETTERS
LA English
DT Article
DE beryllium; Chronic Beryllium Disease; I-CAM; lung epithelial cells;
   immune response
ID INTERCELLULAR-ADHESION MOLECULE-1; NECROSIS-FACTOR-ALPHA; DIESEL EXHAUST
   PARTICLES; NF-KAPPA-B; GENE-EXPRESSION; SOLUBLE ICAM-1; T-CELLS;
   INTERFERON-GAMMA; NATURAL-HISTORY; IMMUNE-RESPONSE
AB Chronic Beryllium Disease (CBD) is a delayed-type hypersensitivity immune reaction that leads to granuloma formation in the lungs and potentially severe loss of pulmonary function. Although the molecular mechanisms that mediate beryllium (Be)-stimulated granuloma formation are not well understood, cell adhesion molecules are likely to play a key role in the migration of immune cells to sites of inflammation. In this study, we examined the role of the cell adhesion molecule I-CAM1 in Be-stimulated small airway epithelial cells (SAECs). These epithelial cells line the airway and represent the first point of contact for inhaled foreign substances. We find that Be exposure specifically induced I-CAM1 expression on the cell surface of SAEC and release of soluble I-CAM1 into the extracellular medium. Furthermore, anti-I-CAM1 antibodies inhibited Be-stimulated adhesion of SAEC to the macrophage cell-line THP1, indicating that the Be-induced adhesive properties of SAEC are at least partly due to I-CAM1 expression. These studies support a model in which I-CAM1 cell adhesion functions may play a role in directing immune cells to the lung and activating a Be-specific immune response in Be hypersensitivity disease. Published by Elsevier Ireland Ltd.
C1 [Rodriguez, Shannan; Kunde, Yuliya A.; Hong-Geller, Elizabeth] Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
   [McCleskey, T. Mark] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA.
   [Rodriguez, Shannan] No New Mexico Coll, Espanola, NM USA.
RP Hong-Geller, E (reprint author), Los Alamos Natl Lab, Biosci Div, POB 1663, Los Alamos, NM 87545 USA.
EM ehong@lanl.gov
RI McCleskey, Thomas/J-4772-2012; 
OI Mccleskey, Thomas/0000-0003-3750-3245
NR 45
TC 2
Z9 4
U1 0
U2 4
PU ELSEVIER IRELAND LTD
PI CLARE
PA ELSEVIER HOUSE, BROOKVALE PLAZA, EAST PARK SHANNON, CO, CLARE, 00000,
   IRELAND
SN 0378-4274
J9 TOXICOL LETT
JI Toxicol. Lett.
PD JUL 10
PY 2008
VL 179
IS 3
BP 140
EP 147
DI 10.1016/j.toxlet.2008.04.014
PG 8
WC Toxicology
SC Toxicology
GA 331VZ
UT WOS:000258042000005
PM 18539414
ER

PT J
AU Antonov, VE
   Kolesnikov, AI
   Markushkin, YE
   Palnichenko, AV
   Ren, Y
   Sakharov, MK
AF Antonov, V. E.
   Kolesnikov, A. I.
   Markushkin, Yu E.
   Palnichenko, A. V.
   Ren, Y.
   Sakharov, M. K.
TI Heat capacity of alpha-AlH(3) and alpha-AlD(3) at temperatures up to
   1000 K
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID ALUMINUM-HYDRIDE; CRYSTAL-STRUCTURE; PRESSURE; EQUATION; STATE; ALH3;
   ALD3
AB The densest a modification of AlH(3) and AlD(3) is thermodynamically stable at high hydrogen pressures. At ambient pressure, alpha-AlH(3) and alpha-AlD(3) rapidly and irreversibly decompose to Al and H(2) or D(2) gas when heated to about 420 and 520 K, respectively. In the present paper, the heat capacities at constant volume (CV) and at constant pressure (CP) are calculated for alpha-AlH(3) and alpha-AlD(3) at a pressure of 1 atm and temperatures 0-1000 K using the phonon densities of states determined earlier by inelastic neutron scattering at helium temperatures (Kolesnikov et al 2007 Phys. Rev. B 76 064302). The C(P) ( T) dependence of AlH3 is also measured at temperatures 6-30 K and 130-320 K and that of AlD3 at 130-320 K in order to compensate for the scatter in the literature data and to improve the accuracy of the calculated C(V) and C(P) dependences at low temperatures.
C1 [Antonov, V. E.; Palnichenko, A. V.; Sakharov, M. K.] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Russia.
   [Kolesnikov, A. I.; Ren, Y.] Argonne Natl Lab, Argonne, IL 60439 USA.
   [Markushkin, Yu E.] Bochvar All Russian Sci Res Inst Inorgan Mat, Moscow 123060, Russia.
RP Antonov, VE (reprint author), Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Russia.
EM antonov@issp.ac.ru
RI Sakharov, Mikhail/A-2570-2010; Kolesnikov, Alexander/I-9015-2012
OI Kolesnikov, Alexander/0000-0003-1940-4649
NR 17
TC 5
Z9 5
U1 1
U2 4
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD JUL 9
PY 2008
VL 20
IS 27
AR 275204
DI 10.1088/0953-8984/20/27/275204
PG 10
WC Physics, Condensed Matter
SC Physics
GA 319QH
UT WOS:000257178300006
PM 21694366
ER

PT J
AU Farha, OK
   Mulfort, KL
   Thorsness, AM
   Hupp, JT
AF Farha, Omar K.
   Mulfort, Karen L.
   Thorsness, Alison M.
   Hupp, Joseph T.
TI Separating solids: Purification of metal-organic framework materials
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID HYDROGEN STORAGE; SORPTION PROPERTIES; COORDINATION; ADSORPTION; DESIGN;
   BINDING; SITES
C1 [Farha, Omar K.; Mulfort, Karen L.; Hupp, Joseph T.] NW Univ, Dept Chem, Int Inst Nanotechnol, Evanston, IL 60208 USA.
   [Mulfort, Karen L.] Argonne Natl Lab, Div Chem Sci & Engn, Argonne, IL 60439 USA.
   [Thorsness, Alison M.] St Johns Univ, Coll St Benedict, St Joseph, MN 56374 USA.
RP Hupp, JT (reprint author), NW Univ, Dept Chem, Int Inst Nanotechnol, 2145 Sheridan Rd, Evanston, IL 60208 USA.
EM j-hupp@northwestern.edu
RI Hupp, Joseph/K-8844-2012; Farha, Omar/B-5512-2014
OI Hupp, Joseph/0000-0003-3982-9812; Farha, Omar/0000-0002-9904-9845
NR 20
TC 57
Z9 57
U1 4
U2 30
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD JUL 9
PY 2008
VL 130
IS 27
BP 8598
EP 8599
DI 10.1021/ja803097e
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA 322EP
UT WOS:000257358300016
PM 18549210
ER

PT J
AU Lee, BC
   Chu, TK
   Dill, KA
   Zuckermann, RN
AF Lee, Byoung-Chul
   Chu, Tammy K.
   Dill, Ken A.
   Zuckermann, Ronald N.
TI Biomimetic nanostructures: Creating a high-affinity zinc-binding site in
   a folded nonbiological polymer
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID PHASE SUBMONOMER SYNTHESIS; PEPTOID-PEPTIDE HYBRIDS; N-SUBSTITUTED
   GLYCINES; CHIRAL SIDE-CHAINS; PROTEIN DESIGN; OLIGOMERS; LOOP;
   STABILITY; LIGANDS; POLYPEPTOIDS
AB One of the long-term goals in developing advanced biomaterials is to generate protein-like nanostructures and functions from a completely nonnatural polymer. Toward that end, we introduced a high-affinity zinc-binding function into a peptoid (N-substituted glycine polymer) two-helix bundle. Borrowing from well-understood zinc-binding motifs in proteins, thiol and imidazole moieties were positioned within the peptoid such that both helices must align in close proximity to form a binding site. We used fluorescence resonance energy transfer (FRET) reporter groups to measure the change of the distance between the two helical segments and to probe the binding of zinc. We systematically varied the position and number of zinc-binding residues, as well as the sequence and size of the loop that connects the two helical segments. We found that certain peptoid two-helix bundles bind zinc with nanomolar affinities and high selectivity compared to other divalent metal ions. Our work is a significant step toward generating biomimetic nanostructures with enzyme-like functions.
C1 [Lee, Byoung-Chul; Dill, Ken A.] Univ Calif San Francisco, Grad Grp Biophys, San Francisco, CA 94143 USA.
   [Lee, Byoung-Chul; Dill, Ken A.] Univ Calif San Francisco, Dept Pharmaceut Chem, San Francisco, CA 94143 USA.
   [Lee, Byoung-Chul; Chu, Tammy K.; Zuckermann, Ronald N.] Univ Calif Berkeley, Lawrence Berkeley Lab, Biol Nanostruct Facil, Berkeley, CA 94720 USA.
RP Dill, KA (reprint author), Univ Calif San Francisco, Grad Grp Biophys, 600 16th St, San Francisco, CA 94143 USA.
EM dill@maxwell.compbio.ucsf.edu; rnzuckermann@lbl.gov
RI Zuckermann, Ronald/A-7606-2014
OI Zuckermann, Ronald/0000-0002-3055-8860
FU NIGMS NIH HHS [GM34993, R01 GM034993-21, R01 GM034993]
NR 53
TC 87
Z9 87
U1 4
U2 38
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD JUL 9
PY 2008
VL 130
IS 27
BP 8847
EP 8855
DI 10.1021/ja802125x
PG 9
WC Chemistry, Multidisciplinary
SC Chemistry
GA 322EP
UT WOS:000257358300050
PM 18597438
ER

PT J
AU Hooper, SD
   Raes, J
   Foerstner, KU
   Harrington, ED
   Dalevi, D
   Bork, P
AF Hooper, Sean D.
   Raes, Jeroen
   Foerstner, Konrad U.
   Harrington, Eoghan D.
   Dalevi, Daniel
   Bork, Peer
TI A Molecular Study of Microbe Transfer between Distant Environments
SO PLOS ONE
LA English
DT Article
AB Background: Environments and their organic content are generally not static and isolated, but in a constant state of exchange and interaction with each other. Through physical or biological processes, organisms, especially microbes, may be transferred between environments whose characteristics may be quite different. The transferred microbes may not survive in their new environment, but their DNA will be deposited. In this study, we compare two environmental sequencing projects to find molecular evidence of transfer of microbes over vast geographical distances.
   Methodology: By studying synonymous nucleotide composition, oligomer frequency and orthology between predicted genes in metagenomics data from two environments, terrestrial and aquatic, and by correlating with phylogenetic mappings, we find that both environments are likely to contain trace amounts of microbes which have been far removed from their original habitat. We also suggest a bias in direction from soil to sea, which is consistent with the cycles of planetary wind and water.
   Conclusions: Our findings support the Baas-Becking hypothesis formulated in 1934, which states that due to dispersion and population sizes, microbes are likely to be found in widely disparate environments. Furthermore, the availability of genetic material from distant environments is a possible font of novel gene functions for lateral gene transfer.
C1 [Hooper, Sean D.] DOE JGI, Walnut Creek, CA USA.
   [Raes, Jeroen; Foerstner, Konrad U.; Harrington, Eoghan D.; Bork, Peer] EMBL, Heidelberg, Germany.
   [Dalevi, Daniel] Lawrence Berkeley Natl Lab, Biol Data Management & Technol Ctr, Berkeley, CA USA.
RP Hooper, SD (reprint author), DOE JGI, Walnut Creek, CA USA.
EM bork@embl.de
RI Bork, Peer/F-1813-2013; 
OI Bork, Peer/0000-0002-2627-833X; Forstner, Konrad U./0000-0002-1481-2996
FU EU 6th Framework Programme [LSHG-CT-2004-503567, LSHG-CT-2003-503265]
FX This work was supported by the EU 6th Framework Programme, Contract Nrs
   LSHG-CT-2004-503567 (GeneFun) and LSHG-CT-2003-503265 (BioSapiens). The
   funders had no role in study design, data collection and analysis,
   decision to publish, or preparation of the manuscript.
NR 32
TC 13
Z9 14
U1 3
U2 7
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD JUL 9
PY 2008
VL 3
IS 7
AR e2607
DI 10.1371/journal.pone.0002607
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 417GZ
UT WOS:000264065800013
PM 18612393
ER

PT J
AU Paulick, MG
   Bertozzi, CR
AF Paulick, Margot G.
   Bertozzi, Carolyn R.
TI The glycosylphosphatidylinositol anchor: A complex membrane-anchoring
   structure for proteins
SO BIOCHEMISTRY
LA English
DT Article
ID GLYCOSYL-PHOSPHATIDYLINOSITOL ANCHOR; VARIANT SURFACE GLYCOPROTEIN;
   SUPPORTED LIPID-BILAYERS; FORMING TOXIN AEROLYSIN; PRION PROTEIN;
   CELL-SURFACE; SIGNAL-TRANSDUCTION; CHEMICAL-SYNTHESIS; SYNTHETIC GPI;
   BIOSYNTHESIS
AB Positioned at the C-terminus of many eukaryotic proteins, the glycosylphosphatidylinositol (GPI) anchor is a posttranslational modification that anchors the modified protein in the outer leaflet of the cell membrane. The GPI anchor is a complex structure comprising a phosphoethanolamine linker, glycan core, and phospholipid tail. GPI-anchored proteins are structurally and functionally diverse and play vital roles in numerous biological processes. While several GPI-anchored proteins have been characterized, the biological functions of the GPI anchor have yet to be elucidated at a molecular level. This review discusses the structural diversity of the GPI anchor and its putative cellular functions, including involvement in lipid raft partitioning, signal transduction, targeting to the apical membrane, and prion disease pathogenesis. We specifically highlight studies in which chemically synthesized GPI anchors and analogues have been employed to study the roles of this unique posttranslational modification.
C1 [Paulick, Margot G.; Bertozzi, Carolyn R.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Bertozzi, Carolyn R.] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
   [Bertozzi, Carolyn R.] Univ Calif Berkeley, Howard Hughes Med Inst, Berkeley, CA 94720 USA.
   [Bertozzi, Carolyn R.] Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
   [Bertozzi, Carolyn R.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Bertozzi, CR (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM crb@berkeley.edu
FU Howard Hughes Medical Institute; NIGMS NIH HHS [GM59907, R01 GM059907]
NR 74
TC 224
Z9 230
U1 5
U2 42
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0006-2960
J9 BIOCHEMISTRY-US
JI Biochemistry
PD JUL 8
PY 2008
VL 47
IS 27
BP 6991
EP 7000
DI 10.1021/bi8006324
PG 10
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 320TE
UT WOS:000257257100003
PM 18557633
ER

PT J
AU Chao, LY
   Marletta, MA
   Rine, J
AF Chao, Lily Y.
   Marletta, Michael A.
   Rine, Jasper
TI Sre1, an iron-modulated GATA DNA-binding protein of iron-uptake genes in
   the fungal pathogen Histoplasma capsulatum
SO BIOCHEMISTRY
LA English
DT Article
ID TRANSCRIPTION FACTOR GATA-1; YEAST SCHIZOSACCHAROMYCES-POMBE;
   NEUROSPORA-CRASSA; USTILAGO-MAYDIS; SIDEROPHORE BIOSYNTHESIS;
   ESCHERICHIA-COLI; TRANSPORT; EXPRESSION; URBS1; FEP1
AB The pathogenic fungus Histoplasma capsulatum requires iron for its survival during macrophage infection. Because iron is toxic at high levels, iron acquisition in pathogenic organisms, including H. capsulatum, is a highly regulated process. In response to excess iron, H. capsulatum represses transcription of genes involved in iron uptake. We report here that SRE1, a gene encoding a GATA-type protein, bound to promoter sequences of genes involved in siderophore biosynthesis. Sre1 had sequence similarity to the fungal negative regulators of siderophore biosynthesis. Expression of SRE1 was reduced under iron-starving conditions, underscoring its role as a negative regulator of genes involved in iron uptake. Sre1p specifically bound DNA containing the 5'-(G/A)ATC(T/A)GATAA-3' sequence, and that binding was both iron- and zinc-dependent. Metal analysis indicated that a substoichiometric amount of iron, predominately Fe3+, was bound to the purified protein. About 0.5-1 equiv of Fe3+ per monomer was necessary for full DNA-binding activity. Mutations in the conserved cysteine residues in the cysteine-rich region led to a decrease in bound iron. The loss of iron led to a similar to 2.5-fold decrease in DNA-binding affinity, indicating that iron was directly involved in SRE1 regulation of iron-uptake genes.
C1 [Marletta, Michael A.; Rine, Jasper] Univ Calif Berkeley, Calif Inst Quantitat Biosci, Berkeley, CA 94720 USA.
   [Marletta, Michael A.; Rine, Jasper] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
   [Chao, Lily Y.] Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Marletta, Michael A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys Biosci, Berkeley, CA 94720 USA.
RP Marletta, MA (reprint author), Univ Calif Berkeley, Calif Inst Quantitat Biosci, 570 Stanley Hall, Berkeley, CA 94720 USA.
EM marletta@berkeley.edu; jrine@berkeley.edu
FU NIGMS NIH HHS [GM35827, GM31105, R01 GM035827]
NR 42
TC 40
Z9 40
U1 1
U2 3
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0006-2960
J9 BIOCHEMISTRY-US
JI Biochemistry
PD JUL 8
PY 2008
VL 47
IS 27
BP 7274
EP 7283
DI 10.1021/bi800066s
PG 10
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 320TE
UT WOS:000257257100032
PM 18549241
ER

PT J
AU Xing, HZ
   Li, JY
   Yan, WF
   Chen, P
   Jin, Z
   Yu, JH
   Dai, S
   Xu, RR
AF Xing, Hongzhu
   Li, Jiyang
   Yan, Wenfu
   Chen, Peng
   Jin, Zhao
   Yu, Jihong
   Dai, Sheng
   Xu, Ruren
TI Cotemplating ionothermal synthesis of a new open-framework
   aluminophosphate with unique Al/P ratio of 6/7
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID STRUCTURE-DIRECTING ROLE; MOLECULAR-SIEVES; ZEOLITE; TEMPLATE
C1 [Xing, Hongzhu; Li, Jiyang; Yan, Wenfu; Chen, Peng; Jin, Zhao; Yu, Jihong; Xu, Ruren] Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China.
   [Dai, Sheng] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Yu, JH (reprint author), Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China.
EM jihong@jlu.edu.cn
RI yu, jihong/C-1381-2011; Li, Jiyang/O-3056-2013; Dai, Sheng/K-8411-2015
OI yu, jihong/0000-0003-1991-2942; Dai, Sheng/0000-0002-8046-3931
NR 18
TC 72
Z9 74
U1 5
U2 51
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0897-4756
J9 CHEM MATER
JI Chem. Mat.
PD JUL 8
PY 2008
VL 20
IS 13
BP 4179
EP 4181
DI 10.1021/cm800701x
PG 3
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 321BM
UT WOS:000257279200005
ER

PT J
AU Abakumov, AM
   Rossell, MD
   Gutnikova, OY
   Drozhzhin, OA
   Leonova, LS
   Dobrovolsky, YA
   Istomin, SY
   Van Tendeloo, G
   Antipovt, EV
AF Abakumov, Artem M.
   Rossell, Marta D.
   Gutnikova, Olga Yu.
   Drozhzhin, Oleg A.
   Leonova, Ludmila S.
   Dobrovolsky, Yuri A.
   Istomin, Sergey Ya.
   Van Tendeloo, Gustaaf
   Antipovt, Evgeny V.
TI Superspace description, crystal structures, and electric conductivity of
   the Ba4In6-xMgxO13-x/2 solid solutions
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID MODULATED STRUCTURE; SR4FE6O13+/-DELTA; BA2IN2O5; MICROSTRUCTURE;
   PEROVSKITE; TRANSPORT; MECHANISM; SR2FE2O5; DEFECTS; OXIDES
AB Ba3In6-xMgxO13-x/2 solid solutions have been prepar for 0 <= x <= 0.4 and their crystal structures have been studied by transmission electron microscopy and X-ray powder diffraction. The compounds adopt a modulated structure with a face-centered orthorhombic average unit cell with a(0)approximate to a(p) root 2, b(0)approximate to 20.5 angstrom, c(0)approximate to a(p) root 2 (a(p) - parameter of the perovskite subcell) and modulation vector.q=alpha a(0)* , which is compositionally dependent according to the Ba4In4+4 alpha Mg2-4 alpha O12+2 alpha formula.The -superspace group Xmms(alpha 00)0s0 Xrnrn2(a00)0s0 with centering vectors (0,1/2,1/2,1/2), (1/2,0,1/2,0.(1/2,1/2,0 1/2) was propose ed from electron diffraction and structural considerations. A unified suoersoace model is" construtted'to describe the atomic arrangements and the variable oxygen content in the modulated (In, Mg)2Q2+a layers with rock-salt type structure. This model was used to refine the crystai structures of two x= 0 (R-I 0.040, R-p = 0.042) and x = 0.4 (R-I = 0.062, R-p = 0.040) limiting points of the solid solu tions. The cations in these layers adopt a five-fold coordination that can be virtually classified as strongly distorted trigonal bipyramids and tetragonal pyramids. The close similarity of the structural organization of the Ba4In6-xMgxO13-x/2 solid solutions, Sr4Fe6O13 and its anion-deficient derivatives is discussed. Electric conductivity of the Ba4In6-xMgxO13-x/2 was studied by impedance spectroscopy indicating mixed ionicelectronic type of conductivity. Electronic conductivity at different P(O-2) was compared for Ba4In6-xMgxO13-x/2 and Ba2In2O5 and discussed taking into account the peculiarities of their crystal structures.
C1 [Abakumov, Artem M.; Gutnikova, Olga Yu.; Drozhzhin, Oleg A.; Istomin, Sergey Ya.; Antipovt, Evgeny V.] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119991, Russia.
   [Rossell, Marta D.; Van Tendeloo, Gustaaf] Univ Antwerp, EMAT, B-2020 Antwerp, Belgium.
   [Drozhzhin, Oleg A.; Leonova, Ludmila S.; Dobrovolsky, Yuri A.] Russian Acad Sci, Inst Problems Chem Phys, Chernogolovka 142432, Moscow Region, Russia.
   [Rossell, Marta D.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
RP Abakumov, AM (reprint author), Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119991, Russia.
EM abakumov@icr.chem.msu.ru
RI Dobrovolsky, Yury/D-9634-2014; Leonova, Lyudmila/A-8405-2014; Istomin,
   Sergey Ya./E-2548-2016; Rossell, Marta/E-9785-2017; 
OI Dobrovolsky, Yury/0000-0002-2163-6863; Istomin, Sergey
   Ya./0000-0002-9748-072X; Drozhzhin, Oleg/0000-0001-9588-6630
NR 29
TC 14
Z9 14
U1 1
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0897-4756
J9 CHEM MATER
JI Chem. Mat.
PD JUL 8
PY 2008
VL 20
IS 13
BP 4457
EP 4467
DI 10.1021/cm8004216
PG 11
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 321BM
UT WOS:000257279200041
ER

PT J
AU Cheng, G
   Hua, F
   Melnichenko, YB
   Hong, K
   Mays, JW
   Hammouda, B
   Wignall, GD
AF Cheng, Gang
   Hua, Fengjun
   Melnichenko, Yuri B.
   Hong, Kunlun
   Mays, Jimmy W.
   Hammouda, Boualem
   Wignall, George D.
TI Association and structure of thermosensitive comblike block copolymers
   in aqueous solutions
SO MACROMOLECULES
LA English
DT Article
ID ANGLE NEUTRON-SCATTERING; MICELLAR STRUCTURE; TEMPERATURE; TRANSITIONS;
   POLYMERS; SOLVENTS; BEHAVIOR
AB The structures and association properties of thermosensitive block copolymers of poly(methoxyoligo(ethylene glycol) norbornenyl esters) in D(2)O were investigated by small angle neutron scattering (SANS). Each block is a comblike polymer with a polynorbornene (PNB) backbone and oligo ethylene glycol (OEG) side chains (one side chain per NB repeat unit). The chemical formula of the block copolymer is (OEG(3)NB)(79)-(OEG(6.6)NB)(67), where subscripts represent the degree of polymerization (DP) of OEG and NB in each block. The polymer concentration was fixed at 2.0 wt % and the structural changes were investigated over a temperature range between 25 and 68 degrees C. It was found that at room temperature polymers associate to form micelles with a spherical core formed by the block (OEG(3)NB)(79) and corona formed by the block (OEG(6.6)NB)(67) and that the shape of the polymer in the corona could be described by the form factor of rigid cylinders. At elevated temperatures, the aggregation number increased and the micelles became more compact. At temperatures around the cloud point temperature (CPT) T = 60 degrees C a correlation peak started to appear and became pronounced at 68 degrees C due to the formation of a partially ordered structure with a correlation length similar to 349 angstrom.
C1 [Cheng, Gang; Melnichenko, Yuri B.; Wignall, George D.] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
   [Hua, Fengjun; Hong, Kunlun; Mays, Jimmy W.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
   [Hammouda, Boualem] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
RP Cheng, G (reprint author), Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
RI Hong, Kunlun/E-9787-2015; 
OI Hong, Kunlun/0000-0002-2852-5111; Wignall, George/0000-0002-3876-3244
NR 26
TC 16
Z9 17
U1 1
U2 14
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD JUL 8
PY 2008
VL 41
IS 13
BP 4824
EP 4827
DI 10.1021/ma702580v
PG 4
WC Polymer Science
SC Polymer Science
GA 322HQ
UT WOS:000257366200041
ER

PT J
AU Svaneborg, C
   Everaers, R
   Grest, GS
   Curro, JG
AF Svaneborg, Carsten
   Everaers, Ralf
   Grest, Gary S.
   Curro, John G.
TI Connectivity and entanglement stress contributions in strained polymer
   networks
SO MACROMOLECULES
LA English
DT Article
ID MOLECULAR-DYNAMICS SIMULATIONS; CROSS-LINKING NETWORKS;
   STATISTICAL-MECHANICS; RUBBER ELASTICITY; PERMANENT SET; RELAXATION;
   MELTS; PATH; ELASTOMERS; TOPOLOGY
AB Using molecular dynamics simulations and a variant of our primitive path analysis algorithm, we have measured the total stress as well as the connectivity stress contribution for a large variety of generic bead-spring model polymer networks. For randomly cross- and end-linked networks the inferred entanglement stress contribution is excellent agreement with the predictions of the Rubinstein-Panyukov slip-tube model (Macromolecules 2002, 35, 6670). For networks undergoing further cross-linking and bond-breaking in the strained state (chemical aging), the observed stress-strain behavior can be described by a generalization of the slip-tube model in the spirit of Tobolsky's independent network hypothesis. The stress-transfer between independent networks during postcuring appears to obey unexpectedly simple relations.
C1 [Svaneborg, Carsten] Univ Aarhus, Dept Chem, DK-8000 Aarhus, Denmark.
   [Svaneborg, Carsten] Univ Aarhus, Interdisciplinary Nanosci Ctr iNANO, DK-8000 Aarhus, Denmark.
   [Everaers, Ralf] Univ Lyon 1, Ecole Normale Super Lyon, CNRS, Phys Lab,UMR 5672, F-69364 Lyon, France.
   [Grest, Gary S.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
   [Curro, John G.] Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA.
RP Svaneborg, C (reprint author), Univ Aarhus, Dept Chem, Langelandsgade 140, DK-8000 Aarhus, Denmark.
RI M & C, Matter & Complexity/B-9044-2011; Everaers, Ralf/K-2228-2013
OI Everaers, Ralf/0000-0002-6843-2753
NR 38
TC 27
Z9 27
U1 2
U2 30
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD JUL 8
PY 2008
VL 41
IS 13
BP 4920
EP 4928
DI 10.1021/ma800018f
PG 9
WC Polymer Science
SC Polymer Science
GA 322HQ
UT WOS:000257366200055
ER

PT J
AU Han, R
   Zhang, YW
   Dong, XL
   Gai, HW
   Yeung, ES
AF Han, Rui
   Zhang, YeWang
   Dong, Xiuling
   Gai, Hongwei
   Yeung, Edward S.
TI Spectral imaging of single molecules by transmission grating-based
   epi-fluorescence microscopy
SO ANALYTICA CHIMICA ACTA
LA English
DT Article
DE single protein molecule; first-order spectrum; transmission grating;
   fluorescence microscopy
ID PROTEIN MOLECULES; CAPILLARY-ELECTROPHORESIS; DISPERSED FLUORESCENCE;
   SPECTROSCOPY; INTERFACE; FIELD; DYNAMICS; DNA; ADSORPTION; DIFFUSION
AB A spectral imaging method of single protein molecules labeled with a single fluorophore is presented. The method is based on a transmission grating and a routine fluorescence microscope. The bovine serum albumin (BSA) and antiBSA molecules labeled with Alexa Fluor 488 and Alexa Fluor 594, respectively, are used as the model proteins. The fluorescence of single molecules is dispersed into zeroth-order spectrum and first-order spectrum by the transmission grating. Results show that the fluorescence emission spectrum of single molecule converted from the first-order spectral imaging is in good agreement with the bulk fluorescence spectrum. The spectral resolution of 2.4 nm/pixel is obtained, which is sufficient for identifying the molecular species in a multicomponent system. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Han, Rui; Gai, Hongwei; Yeung, Edward S.] Hunan Univ, Ctr Biomed Engn, Changsha 410082, Hunan, Peoples R China.
   [Zhang, YeWang] Jiangsu Univ, Sch Pharmaceut, Zhenjiang 212013, Peoples R China.
   [Dong, Xiuling] Dalian Third Municipal Hosp, Dalian 116033, Peoples R China.
   [Gai, Hongwei] Hunan Univ, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.
   [Yeung, Edward S.] Iowa State Univ, Dept Chem, Ames, IA 50011 USA.
   [Yeung, Edward S.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
RP Gai, HW (reprint author), Hunan Univ, Ctr Biomed Engn, A202, Changsha 410082, Hunan, Peoples R China.
EM gaihw@hnu.cn
RI Zhang, Yewang/A-7260-2008; Zhang, Ye-Wang/E-6119-2015
OI Zhang, Yewang/0000-0002-2292-615X; 
NR 34
TC 18
Z9 18
U1 2
U2 20
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0003-2670
J9 ANAL CHIM ACTA
JI Anal. Chim. Acta
PD JUL 7
PY 2008
VL 619
IS 2
BP 209
EP 214
DI 10.1016/j.aca.2008.05.017
PG 6
WC Chemistry, Analytical
SC Chemistry
GA 326FO
UT WOS:000257644100008
PM 18558114
ER

PT J
AU Pao, CW
   Srolovitz, DJ
AF Pao, Chun-Wei
   Srolovitz, David J.
TI Compressive film stress in a thin, tensile heteroepitaxial film
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID SURFACE; EPITAXY; GROWTH; SOLIDS
AB We performed atomistic scale simulations to simulate the heteroepitaxial growth of a film with a 0.62% tensile misfit strain and monitored the stress evolution. The calculated sigma-(f)t(f) is initially compressive but increases after the first monolayer is completed. We provide theoretical and simulation evidence that this effect is associated with surface stresses. These results demonstrate that wafer curvature measurements lead to unreliable predictions of film stresses when the film is very thin. (c) 2008 American Institute of Physics.
C1 [Pao, Chun-Wei] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   [Srolovitz, David J.] Yeshiva Univ, Dept Phys, New York, NY 10033 USA.
RP Pao, CW (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM cwpao@lanl.gov
RI Pao, Chun-Wei/D-3307-2009
OI Pao, Chun-Wei/0000-0003-0821-7856
NR 17
TC 1
Z9 1
U1 0
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 7
PY 2008
VL 93
IS 1
AR 011903
DI 10.1063/1.2955833
PG 3
WC Physics, Applied
SC Physics
GA 333WP
UT WOS:000258184600018
ER

PT J
AU Chen, BL
   Ji, YY
   Xue, M
   Fronczek, FR
   Hurtado, EJ
   Mondal, JU
   Liang, CD
   Dai, S
AF Chen, Banglin
   Ji, Yanyan
   Xue, Ming
   Fronczek, Frank R.
   Hurtado, Eric J.
   Mondal, Jalal U.
   Liang, Chengdu
   Dai, Sheng
TI Metal-organic framework with rationally tuned micropores for selective
   adsorption of water over methanol
SO INORGANIC CHEMISTRY
LA English
DT Article
ID SECONDARY BUILDING UNITS; FIXED-BED ADSORPTION; HIGH H-2 ADSORPTION;
   GAS-SORPTION; COORDINATION-FRAMEWORK; SEPARATION; HYDROGEN; CRYSTAL;
   MOLECULES; POLYMERS
AB A microporous metal-organic framework 1, Cu(R-GLA-Me)(4,4'-Bipy)(0.5)center dot 0.55H(2)O (R-GLA-Me = R-2-methylglutarate, 4,4'-Bipy = 4,4'-bipyridine), with a primitive cubic net was synthesized and characterized. With pores of about 2.8 x 3.6 angstrom, the activated 1a exhibits exclusive adsorption of water over methanol in a binary water-methanol (1:1) liquid mixture.
C1 [Chen, Banglin; Xue, Ming; Hurtado, Eric J.; Mondal, Jalal U.] Univ Texas Pan Amer, Dept Chem, Edinburg, TX 78539 USA.
   [Ji, Yanyan; Xue, Ming] Jilin Univ, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130023, Peoples R China.
   [Fronczek, Frank R.] Louisiana State Univ, Dept Chem, Baton Rouge, LA 70803 USA.
   [Liang, Chengdu; Dai, Sheng] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
   [Liang, Chengdu; Dai, Sheng] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Chen, BL (reprint author), Univ Texas Pan Amer, Dept Chem, Edinburg, TX 78539 USA.
EM banglin@utpa.edu
RI Chen, Banglin/F-5461-2010; Liang, Chengdu/G-5685-2013; Dai,
   Sheng/K-8411-2015
OI Chen, Banglin/0000-0001-8707-8115; Dai, Sheng/0000-0002-8046-3931
NR 46
TC 63
Z9 63
U1 2
U2 29
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 JUL 7
PY 2008
VL 47
IS 13
BP 5543
EP 5545
DI 10.1021/ic8004008
PG 3
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 321BB
UT WOS:000257278000008
PM 18512902
ER

PT J
AU Veauthier, JM
   Schelter, EJ
   Carlson, CN
   Scott, BL
   Da Re, RE
   Thompson, JD
   Kiplinger, JL
   Morris, DE
   John, KD
AF Veauthier, Jacqueline M.
   Schelter, Eric J.
   Carlson, Christin N.
   Scott, Brian L.
   Da Re, Ryan E.
   Thompson, J. D.
   Kiplinger, Jaqueline L.
   Morris, David E.
   John, Kevin D.
TI Direct comparison of the magnetic and electronic properties of
   samarocene and ytterbocene terpyridine complexes
SO INORGANIC CHEMISTRY
LA English
DT Article
ID CHARGE-TRANSFER; IMPROVED ELECTROCHEMISTRY; LANTHANIDE COMPLEXES;
   GROUND-STATE; COORDINATION; LIGANDS; DECAMETHYLYTTERBOCENE;
   (C5ME5)2SM(THF)2; BIPYRIDINES; EXAMPLES
AB A new complex, Cp*Sm-2(tpy) (1, where Cp* = C5Me5, tpy = 2,2':6',2 ''-terpyridine) and its one-electron oxidized congener [Cp*Sm-2(tpy)]PF6 ([1](+)) have been synthesized and characterized with the aim of comparing their electronic and magnetic behavior to the known ytterbium analogues: Cp*Yb-2(tpy) (2) and [Cp*Yb-2(tpy)]OTf ([2](+)). These new samarium complexes have been characterized using single-crystal X-ray diffraction, H-1 NMR spectroscopy, cyclic voltammetry, optical spectroscopy, and bulk magnetic susceptibility measurements. All data for 1 indicate a Sm(III)-tpy center dot (-)[(4f)(5)-(pi*)(1)] ground-state electronic configuration similar to that found previously for 2 [(4f)(13)-(pi*)(1)]. Structural comparisons reveal that there are no significant changes in the overall geometries associated with the neutral and cationic samarium and ytterbium congeners aside from those anticipated based upon the lanthanide contraction. The redox potentials for the divalent. Cp*(2)Ln(THF)(n) precursors (E-1/2 (Sm2+) = -2.12 V, E-1/2(Yb2+) = -1.48 V) are consistent with established trends, the redox potentials (metal-based reduction and ligand-based oxidation) for 1 are nearly identical to those for 2. The correlation in the optical spectra of 1 and 2 is excellent, as expected for this ligand-radical based electronic structural assignment, but there does appear to be a red-shift (similar to 400 cm(-1)) in all of the bands of 1 relative to those of 2 that suggests a slightly greater stabilization of the pi* level(s) in the samarium(III) complex compared to that in the ytterbium(III) complex. Similar spectroscopic overlap is observed for the monocationic complexes [1](+) and [2](+). Bulk magnetic susceptibility measurements for 1 reveal significantly different behavior than that of 2 due to differences in the electronic-state structure of the two metal ions. The implications of these differences in magnetic behavior are discussed.
C1 [Veauthier, Jacqueline M.; Schelter, Eric J.; Carlson, Christin N.; Scott, Brian L.; Da Re, Ryan E.; Thompson, J. D.; Kiplinger, Jaqueline L.; Morris, David E.; John, Kevin D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP John, KD (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM kjohn@lani.gov
RI Schelter, Eric/E-2962-2013; Morris, David/A-8577-2012; Kiplinger,
   Jaqueline/B-9158-2011; Scott, Brian/D-8995-2017; 
OI Kiplinger, Jaqueline/0000-0003-0512-7062; Scott,
   Brian/0000-0003-0468-5396; Veauthier, Jacqueline/0000-0003-2206-7786;
   John, Kevin/0000-0002-6181-9330
NR 41
TC 39
Z9 39
U1 1
U2 12
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 JUL 7
PY 2008
VL 47
IS 13
BP 5841
EP 5849
DI 10.1021/ic8001465
PG 9
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 321BB
UT WOS:000257278000047
PM 18540594
ER

PT J
AU Barrios, LA
   Aromi, G
   Frontera, A
   Quinonero, D
   Deya, PM
   Gamez, P
   Roubeau, O
   Shotton, EJ
   Teat, SJ
AF Barrios, Leoni A.
   Aromi, Guillem
   Frontera, Antonio
   Quinonero, David
   Deya, Pere M.
   Gamez, Patrick
   Roubeau, Olivier
   Shotton, Elizabeth J.
   Teat, Simon J.
TI Coordination complexes exhibiting anion center dot center dot center dot
   pi interactions: Synthesis, structure, and theoretical studies
SO INORGANIC CHEMISTRY
LA English
DT Article
ID CRYSTALLOGRAPHIC EVIDENCE; HETEROAROMATIC RINGS; DONOR LIGANDS;
   S-TRIAZINE; CATION-PI; RECEPTORS; BINDING; RECOGNITION; RADII;
   COPPER(II)
AB The polydentate ligand 2,4,6-tris(dipyridin-2-ylamino)-1,3,5-triazine (dpyatriz) in combination with the Cu(ClO(4))(2)/CuX(2) salt mixtures (X(-) = Cl(-), Br(-), or (-)(3)) leads to the formation of molecular coordination aggregates with formulas [Cu(3)Cl(3)(dpyatriz)(2)](ClO(4))(3) (2), [Cu(3)Br(3)(dpyatriz)(2)](ClO(4))(3) (3), and [Cu(4)(N(3))(4)(dpyatriz)(2)(DMF)(4)(ClO(4))(2)](ClO(4))(2) (4). These complexes consist of two dpyatriz ligands bridged via coordination to Cull and disposed either face-to-face in an eclipsed manner (2 and 3) or parallel and mutually shifted in one direction. The copper ions complete their coordination positions with Cl(-) (2), Br(-) (3), or N(3)(-), ClO(4)(-), and N,N-dimethylformamide (DMF) (4) ligands. All complexes crystallize together with noncoordinate ClO(4)(-) groups that display anion center dot center dot center dot pi interactions with the triazine rings. These interactions have been studied by means of high level ab initio calculations and the MIPp partition scheme. These calculations have proven the ClO(4)(-) center dot center dot center dot [C(3)N(3)] interactions to be favorable and have revealed a synergistic effect from the combined occurrence of pi-pi stacking of triazine rings and the interaction of these moieties with perchlorate ions, as observed in the experimental systems.
C1 [Barrios, Leoni A.; Aromi, Guillem] Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain.
   [Frontera, Antonio; Quinonero, David; Deya, Pere M.] Univ Illes Balears, Dept Chem, Palma de Mallorca 07122, Spain.
   [Gamez, Patrick] Leiden Univ, Leiden Inst Chem, Gorlaeus Labs, NL-2300 RA Leiden, Netherlands.
   [Roubeau, Olivier] Univ Bordeaux 1, Ctr Rech Paul Pascal, CNRS, F-33600 Pessac, France.
   [Shotton, Elizabeth J.; Teat, Simon J.] CCLRC Daresbury Lab, Warrington WA4 4AD, Cheshire, England.
   [Teat, Simon J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Aromi, G (reprint author), Univ Barcelona, Dept Quim Inorgan, Diagonal 647, E-08028 Barcelona, Spain.
EM toni.frontera@uib.es
RI Roubeau, Olivier/A-6839-2010; Gamez, Patrick/B-3610-2012; Frontera,
   Antonio/G-4517-2010; Shotton, Elizabeth/C-3486-2014; Deya,
   Pere/K-4215-2014; Aromi, Guillem/I-2483-2015; BARRIOS MORENO, LEONI
   ALEJANDRA/E-5413-2017
OI Roubeau, Olivier/0000-0003-2095-5843; Gamez,
   Patrick/0000-0003-2602-9525; Frontera, Antonio/0000-0001-7840-2139;
   Deya, Pere/0000-0002-9825-7693; Aromi, Guillem/0000-0002-0997-9484;
   BARRIOS MORENO, LEONI ALEJANDRA/0000-0001-7075-9950
NR 53
TC 56
Z9 56
U1 0
U2 8
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
J9 INORG CHEM
JI Inorg. Chem.
PD JUL 7
PY 2008
VL 47
IS 13
BP 5873
EP 5881
DI 10.1021/ic800215r
PG 9
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 321BB
UT WOS:000257278000051
PM 18510284
ER

PT J
AU Ginovska, B
   Camaioni, DM
   Dupuis, M
AF Ginovska, Bojana
   Camaioni, Donald M.
   Dupuis, Michel
TI The H2O2+OH -> HO2+H2O reaction in aqueous solution from a
   charge-dependent continuum model of solvation
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID HYDROGEN ABSTRACTION REACTION; RATE CONSTANTS; FREE-ENERGIES; AB-INITIO;
   BASIS-SET; HYDROXYL RADICALS; 1ST-ROW ELEMENTS; PEROXIDE; WATER;
   KINETICS
AB We applied our recently developed protocol of the conductorlike continuum model of solvation to describe the title reaction in aqueous solution. The model has the unique feature of the molecular cavity being dependent on the atomic charges in the solute and can be extended naturally to transition states and reaction pathways. It was used to calculate the reaction energetics and reaction rate in solution for the title reaction. The rate of reaction calculated using canonical variational transition state theory in the context of the equilibrium solvation path approximation, and including correction for tunneling through the small curvature approximation, was found to be 3.6x10(6) M-1 s(-1), significantly slower than in the gas phase in accord with experiment. These results suggest that the present protocol of the conductorlike continuum model of solvation with the charge-dependent cavity definition captures qualitatively and quantitatively the solvation effects at transition states and allows for quantitative estimates of reaction rates in solutions. (c) 2008 American Institute of Physics.
C1 [Ginovska, Bojana; Camaioni, Donald M.; Dupuis, Michel] Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA.
RP Ginovska, B (reprint author), Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA.
EM donald.camaioni@pnl.gov
NR 58
TC 8
Z9 8
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 JUL 7
PY 2008
VL 129
IS 1
AR 014506
DI 10.1063/1.2943315
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 323SG
UT WOS:000257468100024
PM 18624482
ER

PT J
AU Kohara, S
   Takata, M
   Matsumoto, K
   Hagiwara, R
   Suzuya, K
   Morita, H
   Siewenie, JE
   Benmore, CJ
AF Kohara, Shinji
   Takata, Masaki
   Matsumoto, Kazuhiko
   Hagiwara, Rika
   Suzuya, Kentaro
   Morita, Hidetoshi
   Siewenie, Joan E.
   Benmore, Chris J.
TI Very strong hydrogen bonds in a bent chain structure of
   fluorohydrogenate anions in liquid Cs(FH)(2.3)F
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID X-RAY-DIFFRACTION; CRYSTAL-STRUCTURES; NEUTRON-DIFFRACTION;
   MOLTEN-SALTS; FLUORIDE; SCATTERING
AB The structure of liquid Cs(FH)(2.3)F was revealed using a combination of high-energy x-ray and neutron diffraction measurements. We found that the strongest intermolecular H-F hydrogen bonds at an average distance of 1.36 A are accompanied by the formation of a high degree of bending of the oligomer chain in the melt, with angle FHF=150 degrees. A reverse Monte Carlo simulation showed that the average number of atoms per chain is 4.4. A detailed chain analysis of the atomic configuration revealed that (FH)(2)F(-) oligomer chains are the major entities in the liquid, and asymmetrical FHF(-) are formed owing to the strong H-F hydrogen bonds. The results suggest that an average of one or two HF molecules bond to each of the 11 fluorine atoms surrounding a cesium ion. (C) 2008 American Institute of Physics.
C1 [Kohara, Shinji; Takata, Masaki] Japan Synchrotron Radiat Res Inst, Res & Utilizat Div, Sayo Cho, Hyogo 6795198, Japan.
   [Matsumoto, Kazuhiko; Hagiwara, Rika] Kyoto Univ, Grad Sch Energy Sci, Sakyo Ku, Kyoto 6068501, Japan.
   [Suzuya, Kentaro] Japan Atom Energy Agcy, J PARC Ctr, Tokai, Ibaraki 3191195, Japan.
   [Morita, Hidetoshi] Yamagata Univ, Grad Sch Sci & Engn, Yamagata 9908560, Japan.
   [Siewenie, Joan E.; Benmore, Chris J.] Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA.
RP Kohara, S (reprint author), Japan Synchrotron Radiat Res Inst, Res & Utilizat Div, 1-1-1 Kouto, Sayo Cho, Hyogo 6795198, Japan.
EM kohara@spring8.or.jp
OI Benmore, Chris/0000-0001-7007-7749
NR 31
TC 4
Z9 4
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 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUL 7
PY 2008
VL 129
IS 1
AR 014512
DI 10.1063/1.2944269
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 323SG
UT WOS:000257468100030
PM 18624488
ER

PT J
AU Sun, J
   Lu, WC
   Li, ZS
   Wang, CZ
   Ho, KM
AF Sun, Jiao
   Lu, Wen-Cai
   Li, Ze-Sheng
   Wang, C. Z.
   Ho, K. M.
TI Appearance of the bulk motif in Al clusters
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID ALUMINUM CLUSTERS; PHOTOELECTRON-SPECTROSCOPY; ELECTRONIC-PROPERTIES;
   APPROXIMATION; IODIDE; AL-13; IONS
AB We have performed an unbiased search for the lowest-energy structures of medium-sized aluminum clusters Al(n) (n=19-26) using a genetic algorithm (GA) coupled with a tight-binding interatomic potential. Structural candidates obtained from our GA search were further optimized using density functional theory. It is found that the double icosahedron is not the most stable structure for Al(19) but serves as the core for Al(20) and Al(21). The lowest-energy structures of Al(n) are found to undergo a transition to an aluminum bulk motif above Al(23). In particular, the lowest-energy structure of Al(26) is almost a fragment of the bulk face-centered-cubic crystal except for the stacking fault at the bottom layer. Anion clusters were also studied. (C) 2008 American Institute of Physics.
C1 [Sun, Jiao; Lu, Wen-Cai; Li, Ze-Sheng] Jilin Univ, Inst Theoret Chem, State Key Lab Theoret & Computat Chem, Changchun 130021, Jilin, Peoples R China.
   [Lu, Wen-Cai] Qingdao Univ, Dept Phys, Qingdao 266071, Shandong, Peoples R China.
   [Lu, Wen-Cai] Qingdao Univ, Dept Chem, Qingdao 266071, Shandong, Peoples R China.
   [Wang, C. Z.; Ho, K. M.] US DOE, Ames Lab, Ames, IA 50011 USA.
   [Wang, C. Z.; Ho, K. M.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
RP Sun, J (reprint author), Jilin Univ, Inst Theoret Chem, State Key Lab Theoret & Computat Chem, Changchun 130021, Jilin, Peoples R China.
EM wencailu@yahoo.com
NR 34
TC 21
Z9 22
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 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUL 7
PY 2008
VL 129
IS 1
AR 014707
DI 10.1063/1.2946695
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 323SG
UT WOS:000257468100038
PM 18624496
ER

PT J
AU Xu, ZJ
   Meakin, P
AF Xu, Zhijie
   Meakin, Paul
TI Phase-field modeling of solute precipitation and dissolution
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID ARBITRARY VISCOSITY CONTRAST; HELE-SHAW FLOWS; SPINODAL DECOMPOSITION;
   SOLIDIFICATION; DIMENSIONS; CONVECTION; GROWTH; MOTION
AB A phase-field approach to the dynamics of liquid-solid interfaces that evolve due to precipitation and/or dissolution is presented. For the purpose of illustration and comparison with other methods, phase-field simulations were carried out assuming first order reaction (dissolution/precipitation) kinetics. In contrast to solidification processes controlled by a temperature field that is continuous across the solid/liquid interface (with a discontinuous temperature gradient), precipitation/dissolution is controlled by a solute concentration field that is discontinuous at the solid/liquid interface. The sharp-interface asymptotic analysis of the phase-field equations for solidification [A. Karma and W.-J. Rappel, Phys. Rev. E 57, 4323 (1998)] has been modified for precipitation/dissolution processes to demonstrate that the phase-field equations converge to the proper sharp-interface limit. The mathematical model has been validated for a one-dimensional precipitation/dissolution problem by comparison with the analytical solution. (C) 2008 American Institute of Physics.
C1 [Xu, Zhijie; Meakin, Paul] Idaho Natl Lab, Ctr Adv Modeling & Simulat, Idaho Falls, ID 83415 USA.
   [Meakin, Paul] Univ Oslo, N-0316 Oslo, Norway.
   [Meakin, Paul] Inst Energy Technol, Multiphase Flow Assurance Innovat Ctr, N-2027 Kjeller, Norway.
RP Xu, ZJ (reprint author), Idaho Natl Lab, Ctr Adv Modeling & Simulat, Idaho Falls, ID 83415 USA.
EM zhijie.xu@inl.gov
RI Xu, Zhijie/A-1627-2009
OI Xu, Zhijie/0000-0003-0459-4531
NR 20
TC 35
Z9 35
U1 3
U2 16
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUL 7
PY 2008
VL 129
IS 1
AR 014705
DI 10.1063/1.2948949
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 323SG
UT WOS:000257468100036
PM 18624494
ER

PT J
AU Horwat, D
   Anders, A
AF Horwat, David
   Anders, Andre
TI Spatial distribution of average charge state and deposition rate in high
   power impulse magnetron sputtering of copper
SO JOURNAL OF PHYSICS D-APPLIED PHYSICS
LA English
DT Article
ID THIN-FILMS; DENSITIES; DISCHARGE
AB The spatial distribution of copper ions and atoms in high power impulse magnetron sputtering discharges was determined by (i) measuring the ion current to electrostatic probes and (ii) measuring the film thickness by profilometry. A set of electrostatic and collection probes were placed at different angular positions and distances from the target surface. The angular distribution of the deposition rate and the average charge state of the copper species (including ions and neutrals) were deduced.
   The discharge showed a distinct transition to a high current mode dominated by copper self-sputtering when the applied voltage exceeded the threshold of 535 V. For a lower voltage, the deposition rate was very low and the average charge state was found to be less than 0.4. For higher voltage (and average power), the absolute deposition rates were much higher, but they were smaller than the corresponding direct current (dc) rates if normalized to the same average power. At the high voltage level, the spatial distribution of the average charge state showed some similarities to the distribution of the magnetic field, suggesting that the generation and motion of copper ions is affected by magnetized electrons. At higher voltage, the average charge state increases with the distance from the target and locally may exceed unity, indicating the presence of significant amounts of doubly charged copper ions.
C1 [Horwat, David; Anders, Andre] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   [Horwat, David] Nancy Univ, CNRS, Laboratoire Sci & G enie Surfaces, F-54042 Nancy, France.
RP Horwat, D (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM David.Horwat@mines.inpl-nancy.fr
RI Horwat, David/I-8740-2012; Anders, Andre/B-8580-2009; 
OI Anders, Andre/0000-0002-5313-6505; Horwat, David/0000-0001-7938-7647
NR 18
TC 22
Z9 23
U1 1
U2 10
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0022-3727
J9 J PHYS D APPL PHYS
JI J. Phys. D-Appl. Phys.
PD JUL 7
PY 2008
VL 41
IS 13
AR 135210
DI 10.1088/0022-3727/41/13/135210
PG 6
WC Physics, Applied
SC Physics
GA 316DC
UT WOS:000256928100069
ER

PT J
AU Shinar, J
   Shinar, R
AF Shinar, Joseph
   Shinar, Ruth
TI Organic light-emitting devices (OLEDs) and OLED-based chemical and
   biological sensors: an overview
SO JOURNAL OF PHYSICS D-APPLIED PHYSICS
LA English
DT Article
ID DETECTED MAGNETIC-RESONANCE; POLY(PARA-PHENYLENE)-TYPE LADDER-POLYMERS;
   PI-CONJUGATED POLYMERS; METHYLOSINUS-TRICHOSPORIUM OB3B; CURRENT-VOLTAGE
   CHARACTERISTICS; TRIPLET-TRIPLET ANNIHILATION; ENHANCED ELECTRON
   INJECTION; CHARGE-LIMITED CONDUCTION; OXYGEN SENSING MATERIAL; ANTHRAX
   LETHAL FACTOR
AB The basic photophysics, transport properties, state of the art, and challenges in OLED science and technology, and the major developments in structurally integrated OLED-based luminescent chemical and biological sensors are reviewed briefly. The dramatic advances in OLED performance have resulted in devices with projected continuous operating lifetimes of similar to 2 x 10(5) h (similar to 23 yr) at similar to 150 Cdm(-2) ( the typical brightness of a computer monitor or TV). Consequently, commercial products incorporating OLEDs, e. g., cell phones, MP3 players, and, most recently, OLED TVs, are rapidly proliferating.
   The progress in elucidating the photophysics and transport properties, occurring in tandem with the development of OLEDs, has been no less dramatic. It has resulted in a detailed understanding of the dynamics of trapped and mobile negative and positive polarons ( to which the electrons and holes, respectively, relax upon injection), and of singlet and triplet excitons. It has also yielded a detailed understanding of the spin dynamics of polarons and triplet excitons, which affects their overall dynamics significantly.
   Despite the aforementioned progress, there are outstanding challenges in OLED science and technology, notably in improving the efficiency of the devices and their stability at high brightness (> 1000 Cdm(-2)).
   One of the most recent emerging OLED-based technologies is that of structurally integrated photoluminescence-based chemical and biological sensors. This sensor platform, pioneered by the authors, yields uniquely simple and potentially very low-cost sensor ( micro) arrays. The second part of this review describes the recent developments in implementing this platform for gas phase oxygen, dissolved oxygen ( DO), anthrax lethal factor, and hydrazine sensors, and for a DO, glucose, lactate, and ethanol multianalyte sensor.
C1 [Shinar, Joseph] Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
   [Shinar, Joseph] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
   [Shinar, Ruth] Iowa State Univ, Microelect Res Ctr, Ames, IA 50011 USA.
RP Shinar, J (reprint author), Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
NR 250
TC 128
Z9 128
U1 6
U2 113
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0022-3727
J9 J PHYS D APPL PHYS
JI J. Phys. D-Appl. Phys.
PD JUL 7
PY 2008
VL 41
IS 13
AR 133001
DI 10.1088/0022-3727/41/13/133001
PG 26
WC Physics, Applied
SC Physics
GA 316DC
UT WOS:000256928100008
ER

PT J
AU Kumaran, D
   Rawat, R
   Ludivico, ML
   Ahmed, SA
   Swaminathan, S
AF Kumaran, Desigan
   Rawat, Richa
   Ludivico, Matthew L.
   Ahmed, S. Ashraf
   Swaminathan, Subramanyam
TI Structure- and substrate-based inhibitor design for Clostridium
   botulinum neurotoxin serotype A
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID AMINO-ACID-COMPOSITION; ELECTRON-DENSITY MAPS; ACTIVE-SITE RESIDUES;
   LIGHT-CHAIN; MOLECULAR-GRAPHICS; CRYSTAL-STRUCTURE; PROTEASE ACTIVITY;
   TETANUS TOXIN; CLEAVAGE; SYNAPTOBREVIN
AB The seven antigenically distinct serotypes of Clostridium botulinum neurotoxins cleave specific soluble N-ethylmaleimidesensitive factor attachment protein receptor complex proteins and block the release of neurotransmitters that cause flaccid paralysis and are considered potential bioweapons. Botulinum neurotoxin type A is the most potent among the clostridial neurotoxins, and to date there is no post-exposure therapeutic intervention available. To develop inhibitors leading to drug design, it is imperative that critical interactions between the enzyme and the substrate near the active site are known. Although enzyme-substrate interactions at exosites away from the active site are mapped in detail for botulinum neurotoxin type A, information about the active site interactions is lacking. Here, we present the crystal structures of botulinum neurotoxin type A catalytic domain in complex with four inhibitory substrate analog tetrapeptides, viz. RRGC, RRGL, RRGI, andRRGM at resolutions of 1.6-1.8 A. These structures show for the first time the interactions between the substrate and enzyme at the active site and delineate residues important for substrate stabilization and catalytic activity. We show that OH of Tyr(366) and NH(2) of Arg(363) are hydrogen-bonded to carbonyl oxygens of P1 and P1' of the substrate analog and position it for catalytic activity. Most importantly, the nucleophilic water is replaced by the amino group of the N-terminal residue of the tetrapeptide. Furthermore, the S1' site is formed by Phe(194), Thr(215), Thr(220), Asp(370), and Arg(363). The K(i) of the best inhibitory tetrapeptide is 157 nM.
C1 [Kumaran, Desigan; Rawat, Richa; Swaminathan, Subramanyam] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
   [Ludivico, Matthew L.; Ahmed, S. Ashraf] USA, Med Res Inst Infect Dis, Dept Mol Biol, Integrated Toxicol Div, Ft Detrick, MD 21702 USA.
RP Swaminathan, S (reprint author), Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
EM swami@bnl.gov
NR 50
TC 43
Z9 43
U1 1
U2 1
PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA
SN 0021-9258
J9 J BIOL CHEM
JI J. Biol. Chem.
PD JUL 4
PY 2008
VL 283
IS 27
BP 18883
EP 18891
DI 10.1074/jbc.M801240200
PG 9
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 319LR
UT WOS:000257165600045
PM 18434312
ER

PT J
AU Martin, RG
   Bartlett, ES
   Rosner, JL
   Wall, ME
AF Martin, Robert G.
   Bartlett, Emily S.
   Rosner, Judah L.
   Wall, Michael E.
TI Activation of the Escherichia coli marA/soxS/rob regulon in response to
   transcriptional activator concentration
SO JOURNAL OF MOLECULAR BIOLOGY
LA English
DT Article
DE gene regulation; AraC protein family; stress response
ID ANTIBIOTIC-RESISTANCE OPERON; SOXS BINDING-SITES; LON PROTEASE;
   PROMOTERS; MARA; MARRAB; DEGRADATION; ORIENTATION; MECHANISM; BACTERIA
AB The paralogous transcriptional activators MarA, SoxS, and Rob activate a common set of promoters, the marA/soxS/rob regulon of Escherichia coli, by binding a cognate site (marbox) upstream of each promoter. The extent of activation varies from one promoter to another and is only poorly correlated with the in vitro affinity of the activator for the specific marbox. Here, we examine the dependence of promoter activation on the level of activator in vivo by manipulating the steady-state concentrations of MarA and SoxS in Lon protease mutants and by measuring promoter activation using lacZ transcriptional fusions. We found that: (i) the MarA concentrations needed for half-maximal stimulation varied by at least 19-fold among the 10 promoters tested; (ii) most marboxes were not saturated when there were 24,000 molecules of MarA per cell; (iii) the correlation between the MarA concentration needed for half-maximal promoter activity in vivo and marbox binding affinity in vitro was poor; and (iv) the two activators differed in their promoter activation profiles. The marRAB and sodA promoters could both be saturated by MarA and SoxS in vivo. However, saturation by MarA resulted in greater marRAB and lesser sodA transcription than did saturation by SoxS, implying that the two activators interact with RNA polymerase in different ways at the different promoters. Thus, the concentration and nature of activator determine which regulon promoters are activated, as well as the extent of their activation. Published by Elsevier Ltd.
C1 [Martin, Robert G.; Bartlett, Emily S.; Rosner, Judah L.] NIDDK, Mol Biol Lab, NIH, Bethesda, MD 20892 USA.
   [Wall, Michael E.] Los Alamos Natl Lab, Comp Computat & Stat Sci Div, Biosci Div, Los Alamos, NM 87545 USA.
   [Wall, Michael E.] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Martin, RG (reprint author), NIDDK, Mol Biol Lab, NIH, Bethesda, MD 20892 USA.
EM rgmartin@helix.nih.gov
OI Alexandrov, Ludmil/0000-0003-3596-4515
FU Intramural NIH HHS [Z01 DK036116-16]
NR 28
TC 36
Z9 36
U1 0
U2 4
PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 0022-2836
J9 J MOL BIOL
JI J. Mol. Biol.
PD JUL 4
PY 2008
VL 380
IS 2
BP 278
EP 284
DI 10.1016/j.jmb.2008.05.015
PG 7
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 326AJ
UT WOS:000257630000002
PM 18514222
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
   Ay, 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
   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
   Coadou, Y
   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
   Martins, CDO
   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
   Harrington, R
   Hauptman, JM
   Hauser, R
   Hays, J
   Hebbeker, T
   Hedin, D
   Hegeman, JG
   Heinmiller, JM
   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
   Kalinin, AM
   Kalk, JM
   Kappler, S
   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
   Korablev, VM
   Kozelov, AV
   Kraus, J
   Krop, D
   Kuhl, T
   Kumar, A
   Kupco, A
   Kurca, T
   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
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CA D0 Collaboration
TI Observation of the B-c meson in the exclusive decay B-c -> J/psi pi
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SEARCH; SPECTROSCOPY; PHYSICS
AB A fully reconstructed B-c -> J/psi pi signal is observed with the D0 detector at the Fermilab Tevatron p (p) over bar collider using 1.3 fb(-1) of integrated luminosity. The signal consists of 54 +/- 12 candidates with a significance that exceeds 5 standard deviations, and confirms earlier observations of this decay. The measured mass of the B-c meson is 6300 +/- 14(stat)+/- 5(syst) MeV/c(2).
C1 [Abazov, V. M.; Alexeev, G. D.; Kalinin, A. M.; 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.; Molina, J.; Mundim, L.; Nogima, H.; da Silva, W. L. Prado; Rodrigues, R. F.; Santoro, A.; 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.; Chan, K.; Coadou, Y.; 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.; Chan, K.; Coadou, Y.; 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.; Chan, K.; Coadou, Y.; 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.; Chan, K.; Coadou, Y.; Gillberg, D.; Liu, Z.; Moore, R. W.; O'Neil, D. C.; Potter, C.; Taylor, W.; Vachon, B.] McGill Univ, Montreal, PQ, Canada.
   [Han, L.; Liu, Y.] 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 Ferrand, 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.] Univ Aix Marseille 2, CNRS, IN2P3, CPPM, Marseille, France.
   [Calvet, S.; Duflot, L.; Grivaz, J. -F.; Jaffre, M.; Ochando, C.; Petroff, P.] Univ Paris 11, CNRS, IN2P3, LAL, Orsay, France.
   [Andrieu, B.; Bernardi, G.; Lellouch, J.; Sanders, M. P.; Sonnenschein, L.] Univ Paris 06, CNRS, IN2P3, LPNHE, Paris, France.
   [Andrieu, B.; Bernardi, G.; Lellouch, J.; Sanders, M. P.; Sonnenschein, L.] Univ Paris 07, CNRS, IN2P3, LPNHE, Paris, France.
   [Arthaud, M.; Bassler, U.; Besancon, M.; Chakrabarti, S.; Couderc, F.; Deliot, F.; Royon, C.; Shary, V.; Titov, M.; Tuchming, B.] CEA, Serv Phys Particules, DAPNIA, Saclay, France.
   [Bloch, D.; Geist, W.; Gele, D.; Ripp-Baudot, I.; Siccardi, V.] Univ Strasbourg 1, IPHC, Strasbourg, France.
   [Bloch, D.; Geist, W.; Gele, D.; Ripp-Baudot, I.; Siccardi, V.] Univ Haute Alsace, CNRS, IN2P3, Strasbourg, France.
   [Biscarat, C.; Grenier, G.; Kurca, T.; Millet, T.; Muanza, G. S.; Verdier, P.] Univ Lyon 1, CNRS, IN2P3, IPNL, F-69622 Villeurbanne, France.
   [Biscarat, C.; Grenier, G.; Kurca, T.; Millet, T.; Muanza, G. S.; Verdier, P.] Univ Lyon, Lyon, France.
   [Hebbeker, T.; Kappler, S.] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany.
   [Buescher, V.; Hohlfeld, M.; Mundal, O.; Pleier, M. -A.; Wermes, N.] Univ Bonn, Inst Phys, Bonn, Germany.
   [Bernhard, R.; Jakobs, K.; Konrath, J. -P.; Nilsen, H.; Penning, B.; Torchiani, I.] Univ Freiburg, Inst Phys, Freiburg, Germany.
   [Ay, C.; Fiedler, F.; Kuhl, T.; Trefzger, T.; Weber, G.] Johannes Gutenberg Univ Mainz, Inst Phys, 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, Y.; 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.; Ranjan, 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.; Gruenewald, M. W.] Univ Coll Dublin, Dublin 2, Ireland.
   [Ahn, S. H.; Hong, S. J.; Kim, T. J.; 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.] Inst NIKHEF, FOM, 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.
   [Bunichev, V.; Dudko, L. V.; Ermolov, P.; Karmanov, D.; Leflat, A.; Merkin, M.; Perfilov, M.; Zverev, E. G.] Moscow MV Lomonosov State Univ, Moscow, Russia.
   [Bezzubov, V. A.; Denisov, S. P.; Evdokimov, V. N.; Korablev, V. M.; Kozelov, A. V.; Lipaev, V. V.; Popov, A. V.; Shchukin, A. A.; Stoyanova, D. A.; Vasilyev, I. A.] Inst High Energy Phys, Protvino, Russia.
   [Alkhazov, G.; Lobodenko, A.; Neustroev, P.; Obrant, G.; Scheglov, Y.; Uvarov, L.; Uvarov, S.] Petersburg Nucl Phys Inst, St Petersburg, Russia.
   [Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, S.] Lund Univ, Lund, Sweden.
   [Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, S.] Royal Inst Technol, Stockholm, Sweden.
   [Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, S.] Stockholm Univ, S-10691 Stockholm, Sweden.
   [Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, S.] Uppsala Univ, Uppsala, Sweden.
   [Bertram, I.; Borissov, G.; Fox, H.; Love, P.; Rakitine, A.; Ratoff, P. N.; Sopczak, A.] Univ Lancaster, Lancaster, England.
   [Bauer, D.; Beuselinck, R.; Blekman, F.; Buszello, C. P.; Christoudias, T.; Davies, G.; Hays, J.; Jesik, R.; Jonsson, P.; Osman, N.; Petteni, M.; Robinson, S.; Scanlon, T.; Villeneuve-Seguier, F.; Vint, P.] Univ London Imperial Coll Sci Technol & Med, London, England.
   [Harder, K.; Mommsen, R. K.; Owen, M.; Peters, K.; Rich, P.; Schwanenberger, C.; Soeldner-Rembold, S.; Wyatt, T. R.] Univ Manchester, Manchester, Lancs, England.
   [Anderson, S.; Burke, S.; Cheu, E.; Das, A.; Johns, K.; Leveque, J.; Tamburello, P.; Temple, J.; Varnes, E. W.] Univ Arizona, Tucson, AZ 85721 USA.
   [Madaras, R. J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   [Madaras, R. J.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
   [Hall, R. E.] Calif State Univ Fresno, Fresno, CA 93740 USA.
   [Chandra, A.; Ellison, J.; Heinson, A. P.; Li, L.; Wimpenny, S. J.] Univ Calif Riverside, Riverside, CA 92521 USA.
   [Adams, T.; Askew, A.; Atramentov, O.; Blessing, S.; Buchanan, N. J.; Duggan, D.; Gershtein, Y.; Hagopian, S.; Kau, D.; Prosper, H. B.; Sekaric, J.; Sumowidagdo, S.; Wahl, H. D.] Florida State Univ, Tallahassee, FL 32306 USA.
   [Aoki, M.; Bagby, L.; Baldin, B.; Bartlett, J. F.; Bellavance, A.; Bhat, P. C.; Boehnlein, A.; Bross, A.; Casey, B. C. K.; Cihangir, S.; Cooper, W. E.; Demarteau, M.; Denisov, D.; Desai, S.; Diehl, H. T.; Diesburg, M.; Elvira, V. D.; Fisher, W.; Fisk, H. E.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   [Adams, M.; Gerber, C. E.; Heinmiller, J. M.; Shabalina, E.; Varelas, N.] Univ Illinois, Chicago, IL 60607 USA.
   [Blazey, G.; Chakraborty, D.; Dyshkant, A.; Fortner, M.; Hedin, D.; Lima, J. G. R.; Uzunyan, S.; Zatserklyaniy, A.; Zutshi, V.] No Illinois Univ, De Kalb, IL 60115 USA.
   [Andeen, T.; Anzelc, M. S.; Buchholz, D.; Kirby, M. H.; Schellman, H.; Strom, D.; Yacoob, S.; Youn, S. W.] Northwestern Univ, Evanston, IL 60208 USA.
   [Evans, H.; Krop, D.; Parua, N.; Rieger, J.; Van Kooten, R.; Welty-Rieger, L.; Zieminska, D.; Zieminski, A.] Indiana Univ, Bloomington, IN 47405 USA.
   [Chan, K. M.; Hildreth, M. D.; Lam, D.; Osta, J.; Pogorelov, Y.; Ruchti, R.; Smirnov, D.; Svoisky, P.; Warchol, J.; Wayne, M.] Univ Notre Dame, Notre Dame, IN 46556 USA.
   [Parashar, N.] Purdue Univ Calumet, Hammond, IN 46323 USA.
   [Hauptman, J. M.] Iowa State Univ Sci & Technol, Ames, IA 50011 USA.
   [Baringer, P.; Bean, A.; Hensel, C.; Moulik, T.; Wilson, G. W.] Univ Kansas, Lawrence, KS 66045 USA.
   [Ahsan, M.; Bandurin, D. V.; Bolton, T. A.; Ferapontov, A. V.; Maravin, Y.; Onoprienko, D.; Shamim, M.; Von Toerne, E.] Kansas State Univ, Manhattan, KS 66506 USA.
   [Arov, M.; Greenwood, Z. D.; Kalk, J. M.; Sawyer, L.; Steele, J.; Wobisch, M.] Louisiana Tech Univ, Ruston, LA 71272 USA.
   [Baden, A.; Eno, S.; Hadley, N. J.; Jarvis, C.; Toole, T.; Wang, L.; Wetstein, M.; Yan, 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.; Harrington, R.; Hesketh, G.; Reucroft, S.; Wood, D. R.] Northeastern Univ, Boston, MA 02115 USA.
   [Alton, A.; De La Cruz-Burelo, E.; Degenhardt, J. D.; Magerkurth, A.; Neal, H. A.; Qian, J.; Strandberg, J.; Zhou, B.] Univ Michigan, Ann Arbor, MI 48109 USA.
   [Abolins, M.; Benitez, J. A.; Brock, R.; Dyer, J.; Edmunds, D.; Hall, I.; Hauser, R.; Kraus, J.; Linnemann, J.; Piper, J.; Pope, B. G.; Schwienhorst, R.; Unalan, R.] 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, G. R.] 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.; Tuts, P. M.; Zivkovic, L.] Columbia Univ, New York, NY 10027 USA.
   [Cammin, J.; Demina, R.; Ferbel, T.; Garcia, C.; Ginther, G.; Harel, A.; Park, S. -J.; 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.
   [Snow, J.] Langston Univ, Langston, OK 73050 USA.
   [Abbott, B.; Gutierrez, P.; Hossain, S.; Jain, S.; Rominsky, M.; Severini, H.; Skubic, P.; 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.; Li, J.; 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.; Cooke, M.; Corcoran, M.; Mackin, D.; Padley, P.; Pawloski, G.] Rice Univ, Houston, TX 77005 USA.
   [Brown, D.; Buehler, M.; Hirosky, R.] Univ Virginia, Charlottesville, VA 22901 USA.
   [Burnett, T. H.; Garcia-Bellido, A.; Goussiou, A.; Lubatti, H. J.; Mal, P. K.; Watts, G.; Zhao, T.] Univ Washington, Seattle, WA 98195 USA.
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; Yip,
   Kin/D-6860-2013; De, Kaushik/N-1953-2013; Mundim, Luiz/A-1291-2012;
   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; Fisher,
   Wade/N-4491-2013
OI 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; Yip, Kin/0000-0002-8576-4311; De,
   Kaushik/0000-0002-5647-4489; Mundim, Luiz/0000-0001-9964-7805; Novaes,
   Sergio/0000-0003-0471-8549; Dudko, Lev/0000-0002-4462-3192; 
NR 20
TC 58
Z9 58
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 4
PY 2008
VL 101
IS 1
AR 012001
DI 10.1103/PhysRevLett.101.012001
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 323DR
UT WOS:000257424700015
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
   Ay, 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
   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
   Carrera, E
   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
   Coadou, Y
   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
   Martins, CDO
   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
   Harrington, R
   Hauptman, JM
   Hauser, R
   Hays, J
   Hebbeker, T
   Hedin, D
   Hegeman, JG
   Heinmiller, JM
   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
   Kalinin, AM
   Kalk, JM
   Kappler, S
   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
   Korablev, VM
   Kozelov, AV
   Kraus, J
   Krop, D
   Kuhl, T
   Kumar, A
   Kupco, A
   Kurca, T
   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
   Molina, J
   Mommsen, RK
   Mondal, NK
   Moore, RW
   Moulik, T
   Muanza, GS
   Mulders, M
   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
   Patwa, A
   Pawloski, G
   Penning, B
   Perfilov, M
   Peters, K
   Peters, Y
   Petroff, P
   Petteni, M
   Piegaia, R
   Piper, J
   Pleier, MA
   Podesta-Lerma, PLM
   Podstavkov, VM
   Pogorelov, Y
   Pol, ME
   Polozov, P
   Pope, BG
   Popov, AV
   Potter, C
   da Silva, WLP
   Prosper, HB
   Protopopescu, S
   Qian, J
   Quadt, A
   Quinn, B
   Rakitine, A
   Rangel, MS
   Ranjan, K
   Ratoff, PN
   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
   Santoro, A
   Savage, G
   Sawyer, L
   Scanlon, T
   Schaile, D
   Schamberger, RD
   Scheglov, Y
   Schellman, H
   Schliephake, T
   Schwanenberger, C
   Schwartzman, A
   Schwienhorst, R
   Sekaric, J
   Severini, H
   Shabalina, E
   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
   Sonnenschein, L
   Sopczak, A
   Sosebee, M
   Soustruznik, K
   Spurlock, B
   Stark, J
   Steele, J
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CA D0 Collaboration
TI Search for large extra dimensions via single photon plus missing energy
   final states at root s=1.96 TeV
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DETECTOR
AB We report on a search for large extra dimensions in a data sample of approximately 1 fb(-1) of p (p) over bar collisions at root s=1.96 TeV. We investigate Kaluza-Klein graviton production with a photon and missing transverse energy in the final state. At the 95% C.L. we set limits on the fundamental mass scale M(D) from 884 to 778 GeV for two to eight extra dimensions.
C1 [Abazov, V. M.; Alexeev, G. D.; Kalinin, A. M.; Kharzheev, Y. M.; Malyshev, V. L.; Tokmenin, V. V.; Vertogradov, L. S.; Yatsunenko, Y. A.] Joint Inst Nucl Res, Dubna, Russia.
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   [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.; Chan, K.; Coadou, Y.; 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.; Chan, K.; Coadou, Y.; 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.; Alton, A.; Beale, S.; Chandra, A.; Coadou, Y.; 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.; Chan, K.; Coadou, Y.; Gillberg, D.; Liu, Y.; Moore, R. W.; O'Neil, D. C.; Potter, C.; Taylor, W.; Vachon, B.] McGill Univ, Montreal, PQ, Canada.
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   [Andrieu, B.; Bernardi, G.; Lellouch, J.; Sanders, M. P.; Sonnenschein, L.] Univ Paris 07, CNRS, IN2P3, LPNHE, Paris, France.
   [Arthaud, M.; Bassler, U.; Besancon, M.; Chakrabarti, S.; Couderc, F.; Deliot, F.; Royon, C.; Shary, V.; Titov, M.; Tuchming, B.] CEA Saclay, Serv Phys Particules, DAPNIA, Saclay, France.
   [Bloch, D.; Geist, W.; Gele, D.; Ripp-Baudot, I.; Siccardi, V.] Univ Strasbourg 1, IPHC, Strasbourg, France.
   [Bloch, D.; Geist, W.; Gele, D.; Ripp-Baudot, I.; Siccardi, V.] Univ Haute Alsace, CNRS, IN2P3, Strasbourg, France.
   [Biscarat, C.; Grenier, G.; Kurca, T.; Millet, T.; Muanza, G. S.; Verdier, P.] Univ Lyon 1, IPNL, CNRS, IN2P3, Villeurbanne, France.
   [Biscarat, C.; Grenier, G.; Kurca, T.; Millet, T.; Muanza, G. S.; Verdier, P.] Univ Lyon, Lyon, France.
   [Hebbeker, T.; Kappler, S.] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany.
   [Buescher, V.; Hohlfeld, M.; Mundal, O.; Pleier, M. -A.; Wermes, N.] Univ Bonn, Inst Phys, Bonn, Germany.
   [Bernhard, R.; Jakobs, K.; Konrath, J. -P.; Nilsen, H.; Penning, B.; Torchiani, I.] Univ Freiburg, Inst Phys, Freiburg, Germany.
   [Ay, C.; Fiedler, F.; Kuhl, T.; Trefzger, 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, Y.; 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.; Ranjan, 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.; Gruenewald, M. W.] Univ Coll Dublin, Dublin 2, Ireland.
   [Ahn, S. H.; Hong, S. J.; Kim, T. J.; 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.] Inst NIKHEF, FOM, Amsterdam, Netherlands.
   [Hegeman, J. G.; Houben, P.; van den Berg, P. J.; van Leeuwen, W. M.] Univ Amsterdam, NIKHEF, Amsterdam, Netherlands.
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   [Gavrilov, V.; Polozov, P.; Safronov, G.; Stolin, V.] State Atom Energy Commiss, Inst Theoret & Expt Phys, Moscow, Russia.
   [Bunichev, V.; Dudko, L. V.; Ermolov, P.; Karmanov, D.; Leflat, A.; Merkin, M.; Perfilov, M.; Zverev, E. G.] Moscow MV Lomonosov State Univ, Moscow, Russia.
   [Bezzubov, V. A.; Denisov, S. P.; Evdokimov, V. N.; Korablev, V. M.; Kozelov, A. V.; Lipaev, V. V.; Popov, A. V.; Shchukin, A. A.; Stoyanova, D. A.; Vasilyev, I. A.] Inst High Energy Phys, Protvino, Russia.
   [Alkhazov, G.; Lobodenko, A.; Neustroev, P.; Obrant, G.; Scheglov, Y.; Uvarov, L.; Uvarov, S.] Petersburg Nucl Phys Inst, St Petersburg, Russia.
   [Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, S.] Lund Univ, Lund, Sweden.
   [Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, S.] Royal Inst Technol, S-10044 Stockholm, Sweden.
   [Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, S.] Stockholm Univ, S-10691 Stockholm, Sweden.
   [Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, S.] Uppsala Univ, Uppsala, Sweden.
   [Bertram, I.; Borissov, G.; Fox, H.; Love, P.; Rakitine, A.; Ratoff, P. N.; Sopczak, A.] Univ Lancaster, Lancaster, England.
   [Bauer, D.; Beuselinck, R.; Blekman, F.; Buszello, C. P.; Christoudias, T.; Davies, G.; Hays, J.; Jesik, R.; Jonsson, P.; Osman, N.; Petteni, M.; Robinson, S.; Scanlon, T.; Villeneuve-Seguier, F.; Vint, P.] Univ London Imperial Coll Sci Technol & Med, London, England.
   [Harder, K.; Mommsen, R. K.; Owen, M.; Peters, K.; Rich, P.; Schwanenberger, C.; Soeldner-Rembold, S.; Wyatt, T. R.] Univ Manchester, Manchester, Lancs, England.
   [Anderson, S.; Burke, S.; Cheu, E.; Das, A.; Johns, K.; Leveque, J.; Tamburello, P.; Temple, J.; Varnes, E. W.] Univ Arizona, Tucson, AZ 85721 USA.
   [Madaras, R. J.] Univ Calif Berkeley, Berkeley, CA 94720 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, L.; Wimpenny, S. J.] Univ Calif Riverside, Riverside, CA 92521 USA.
   [Adams, T.; Askew, A.; Atramentov, O.; Blessing, S.; Buchanan, N. J.; Duggan, D.; Gershtein, Y.; Hagopian, S.; Kau, D.; Prosper, H. B.; Sekaric, J.; Sumowidagdo, S.; Wahl, H. D.] Florida State Univ, Tallahassee, FL 32306 USA.
   [Aoki, M.; Bagby, L.; Baldin, B.; Bartlett, J. F.; Bellavance, A.; Bhat, P. C.; Boehnlein, A.; Bross, A.; Casey, B. C. K.; Cihangir, S.; Cooper, W. E.; Demarteau, M.; Denisov, S. P.; Desai, S.; Diehl, H. T.; Diesburg, M.; Elvira, V. D.; Fisher, W.; Fisk, H. E.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   [Adams, M.; Gerber, C. E.; Heinmiller, J. M.; Shabalina, E.; Varelas, N.] Univ Illinois, Chicago, IL 60607 USA.
   [Blazey, G.; Chakraborty, D.; Dyshkant, A.; Fortner, M.; Hedin, D.; Lima, J. G. R.; Uzunyan, S.; Zatserklyaniy, A.; Zutshi, V.] No Illinois Univ, De Kalb, IL 60115 USA.
   [Andeen, T.; Anzelc, M. S.; Buchholz, D.; Kirby, M. H.; Schellman, H.; Strom, D.; Yacoob, S.; Youn, S. W.] Northwestern Univ, Evanston, IL 60208 USA.
   [Evans, H.; Krop, D.; Parua, N.; Rieger, J.; Van Kooten, R.; Welty-Rieger, L.; Zieminska, D.; Zieminski, A.] Indiana Univ, Bloomington, IN 47405 USA.
   [Chan, K. M.; Hildreth, M. D.; Lam, D.; Osta, J.; Pogorelov, Y.; Ruchti, R.; Smirnov, D.; Svoisky, P.; Warchol, J.; Wayne, M.] Univ Notre Dame, Notre Dame, IN 46556 USA.
   [Parashar, N.] Purdue Univ Calumet, Hammond, IN 46323 USA.
   [Hauptman, J. M.] Iowa State Univ Sci & Technol, Ames, IA 50011 USA.
   [Baringer, P.; Bean, A.; Hensel, C.; Moulik, T.; Wilson, G. W.] Univ Kansas, Lawrence, KS 66045 USA.
   [Ahsan, M.; Bandurin, D. V.; Bolton, T. A.; Ferapontov, A. V.; Maravin, Y.; Onoprienko, D.; Shamim, M.; von Toerne, E.] Kansas State Univ, Manhattan, KS 66506 USA.
   [Arov, M.; Greenwood, Z. D.; Kalk, J. M.; Sawyer, L.; Steele, J.; Wobisch, M.] Louisiana Tech Univ, Ruston, LA 71272 USA.
   [Baden, A.; Eno, S.; Hadley, N. J.; Jarvis, C.; Toole, T.; Wang, L.; Wetstein, M.; Yan, 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.; Harrington, R.; Hesketh, G.; Reucroft, S.; Wood, D. R.] Northeastern Univ, Boston, MA 02115 USA.
   [Alton, A.; De La Cruz-Burelo, E.; Degenhardt, J. D.; Magerkurth, A.; Neal, H. A.; Qian, J.; Strandberg, J.; Zhou, B.] Univ Michigan, Ann Arbor, MI 48109 USA.
   [Abolins, M.; Benitez, J. A.; Brock, R.; Dyer, J.; Edmunds, D.; Hall, I.; Hauser, R.; Kraus, J.; Linnemann, J.; Piper, J.; Pope, B. G.; Schwienhorst, R.; Unalan, R.] 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, G. R.] 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.; Tuts, P. M.; Zivkovic, L.] Columbia Univ, New York, NY 10027 USA.
   [Cammin, J.; Demina, R.; Ferbel, T.; Garcia, C.; Ginther, G.; Harel, A.; Park, S. -J.; 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.
   [Snow, J.] Langston Univ, Langston, OK 73050 USA.
   [Abbott, B.; Gutierrez, P.; Hossain, S.; Jain, S.; Rominsky, M.; Severini, H.; Skubic, P.; 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.; Li, J.; 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.; Cooke, M.; Corcoran, M.; Mackin, D.; Padley, P.; Pawloski, G.] Rice Univ, Houston, TX 77005 USA.
   [Brown, D.; Buehler, M.; Hirosky, R.] Univ Virginia, Charlottesville, VA 22901 USA.
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RP Abazov, VM (reprint author), Joint Inst Nucl Res, Dubna, Russia.
RI Bargassa, Pedrame/O-2417-2016; Ancu, Lucian Stefan/F-1812-2010; De,
   Kaushik/N-1953-2013; Fisher, Wade/N-4491-2013; 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; Sznajder,
   Andre/L-1621-2016; Li, Liang/O-1107-2015; 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; Perfilov, Maxim/E-1064-2012;
   Shivpuri, R K/A-5848-2010; Gutierrez, Phillip/C-1161-2011; Dudko,
   Lev/D-7127-2012; Leflat, Alexander/D-7284-2012
OI Carrera, Edgar/0000-0002-0857-8507; Bean, Alice/0000-0001-5967-8674;
   Bargassa, Pedrame/0000-0001-8612-3332; Belanger-Champagne,
   Camille/0000-0003-2368-2617; Ancu, Lucian Stefan/0000-0001-5068-6723;
   De, Kaushik/0000-0002-5647-4489; Sharyy,
   Viatcheslav/0000-0002-7161-2616; Christoudias,
   Theodoros/0000-0001-9050-3880; KIM, Tae Jeong/0000-0001-8336-2434;
   Sznajder, Andre/0000-0001-6998-1108; Li, Liang/0000-0001-6411-6107;
   Novaes, Sergio/0000-0003-0471-8549; Mundim, Luiz/0000-0001-9964-7805;
   Yip, Kin/0000-0002-8576-4311; Dudko, Lev/0000-0002-4462-3192; 
NR 21
TC 33
Z9 33
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 4
PY 2008
VL 101
IS 1
AR 011601
DI 10.1103/PhysRevLett.101.011601
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 323DR
UT WOS:000257424700012
PM 18764100
ER

PT J
AU Batista, CD
   Gubernatis, JE
   Durakiewicz, T
   Joyce, JJ
AF Batista, C. D.
   Gubernatis, J. E.
   Durakiewicz, T.
   Joyce, J. J.
TI Strong coupling approach to actinide metals
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID F-ELECTRON SYSTEMS; DELTA-PLUTONIUM; CE COMPOUNDS; PHOTOEMISSION; MODEL
AB We present a strongly correlated approach to the electronic structure of actinide metals by deriving a low-energy Hamiltonian H under the assumption that kinetic energy is small compared to Coulomb and spin-orbit interactions. The H(Pu) for Pu metal is similar to the models used for Ce and other lanthanides but qualitatively different from the H presented for the rest of the actinides. With H(Pu), we computed the photoemission spectrum and specific heat for alpha and delta-Pu and found good agreement with experiment.
C1 [Batista, C. D.; Gubernatis, J. E.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   [Durakiewicz, T.; Joyce, J. J.] Los Alamos Natl Lab, MPA Div, Los Alamos, NM 87545 USA.
RP Batista, CD (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RI Batista, Cristian/J-8008-2016; 
OI Durakiewicz, Tomasz/0000-0002-1980-1874
NR 24
TC 4
Z9 4
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 4
PY 2008
VL 101
IS 1
AR 016403
DI 10.1103/PhysRevLett.101.016403
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 323DR
UT WOS:000257424700042
PM 18764130
ER

EF