FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Sanchez, R
Loaiza, D
Brunson, G
Kimpland, R
AF Sanchez, R
Loaiza, D
Brunson, G
Kimpland, R
TI Critical experiments with highly enriched uranium and matrix elements
(Si, Mg, Al, Gd, and Fe)
SO NUCLEAR SCIENCE AND ENGINEERING
LA English
DT Article
AB Scientists at the Los Alamos National Laboratory measured the critical masses of square prisms of highly enriched uranium diluted in various X/U-235 with matrix material and polyethylene. The configuration cores were 22.86 and 45.72 cm square and were reflected with 8.13-cm-thick and 10.16-cm-thick side polyethylene reflectors, respectively. The configurations had 10.16-cm-thick top and bottom polyethylene reflectors. For some configurations, the Rossi-alpha, which is an eigenvalue characteristic for a particular configuration, was measured to establish a reactivity scale based on the degree of subcriticality. These experiments provided critical mass data in the thermal energy range for systems containing Si, Mg, Al, Gd, and Fe. The measured k(eff) from these experiments was compared with the calculated k(eff) from MCNP using ENDF/B-V and ENDF/B-VI cross-section data. The observed biases were +0.005 Deltak and +0.008 Deltak for Si, +0.0006 Deltak and +0.008 Deltak for Al, +0.0023 Deltak for Mg, +0.004 Deltak and +0.01304 Deltak for Gd, and +0.0123 Deltak and -0.00106 Deltak for Fe.
C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
RP Sanchez, R (reprint author), Los Alamos Natl Lab, MS-J562, Los Alamos, NM 87544 USA.
EM rsanchez@lanl.gov
NR 14
TC 0
Z9 0
U1 0
U2 1
PU AMER NUCLEAR SOCIETY
PI LA GRANGE PK
PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA
SN 0029-5639
J9 NUCL SCI ENG
JI Nucl. Sci. Eng.
PD JUL
PY 2004
VL 147
IS 3
BP 307
EP 318
PG 12
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 837UU
UT WOS:000222667300007
ER
PT J
AU MacDonald, PE
Lee, CB
AF MacDonald, PE
Lee, CB
TI Use of thoria-urania fuels in PWRs: A general review of a NERI project
to assess feasible core designs, economics, fabrication methods, in-pile
thermal/mechanical behavior, and waste form characteristics
SO NUCLEAR TECHNOLOGY
LA English
DT Article
DE thorium fuel; light water reactors; thoria-urania fuel
AB This paper provides an introduction to and a summary of the remaining papers in this issue of Nuclear Technology. The papers in this issue present the important results from a U.S. Department of Energy-sponsored Nuclear Engineering Research Initiative (NERI) project to study the efficacy of the thorium-uranium dioxide (ThO2-UO2) once-through fuel cycle in current light water reactors. The project addressed fuel cycle neutronics and economics; ThO2-UO2 fuel manufacturing; the in-pile thermal/mechanical behavior of ThO2-UO2 fuel during normal, off-normal, and accident conditions; and the long-term stability of ThO2-UO2 waste. Results from this work show that a small-scale separation of the uranium and thorium will enhance the fuel reactivity and achievable burnup from uranium-thorium dioxide fuels. Under conditions that meet the thermal requirements in present pressurized water reactors (PWRs), a properly designed microheterogeneous fuel will have more reactivity than all-uranium fuel, and the overall production of plutonium is significantly reduced. The use of thorium as a host for actinide fuels when PWRs are used for actinide transmutation was also explored. It was also determined that there were no fundamental obstacles to converting the current plants that manufacture uranium oxide-only fuel to a mixed ThO2-UO2 fuel. Also, the in-service and transient thermal and mechanical performance of homogeneous ThO2UO2-based fuels with respect to safety is generally equal to or better than that of all-uranium fuel. Furthermore, a mixed thorium-uranium dioxide spent fuel appears to be a much more stable waste form than uranium oxide spent fuel.
C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA.
Korea Atom Energy Res Inst, Taejon 305600, South Korea.
RP MacDonald, PE (reprint author), Idaho Natl Engn & Environm Lab, POB 1625, Idaho Falls, ID 83415 USA.
EM pem@inel.gov
NR 10
TC 9
Z9 11
U1 2
U2 3
PU AMER NUCLEAR SOCIETY
PI LA GRANGE PK
PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
J9 NUCL TECHNOL
JI Nucl. Technol.
PD JUL
PY 2004
VL 147
IS 1
BP 1
EP 7
PG 7
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 838JA
UT WOS:000222708300001
ER
PT J
AU Shwageraus, E
Zhao, XF
Driscoll, MJ
Hejzlar, P
Kazimi, MS
Herring, JS
AF Shwageraus, E
Zhao, XF
Driscoll, MJ
Hejzlar, P
Kazimi, MS
Herring, JS
TI Microheterogeneous thoria-urania fuels for pressurized water reactors
SO NUCLEAR TECHNOLOGY
LA English
DT Article
DE thorium fuels; reactor physics; PWRs
AB A thorium-based fuel cycle for light water reactors will reduce the plutonium generation rate and enhance the proliferation resistance of the spent fuel. However, priming the thorium cycle with U-235 is necessary, and the U-235 fraction in the uranium must be limited to below 20% to minimize proliferation concerns. Thus, a once-through thorium-uranium dioxide (ThO2-UO2)fuel cycle of no less than 25% uranium becomes necessary for normal pressurized water reactor (PWR) operating cycle lengths. Spatial separation of the uranium and thorium parts of the fuel can improve the achievable burnup of the thorium-uranium fuel designs through more effective breeding of U-233 from the Th-232. Focus is on microheterogeneous fuel designs for PWRs, where the spatial separation of the uranium and thorium is on the order of a few millimetres to a few centimetres, including duplex pellet, axially microheterogeneous fuel, and a checker-board of uranium and thorium pins. A special effort was made to understand the underlying reactor physics mechanisms responsible for enhancing the achievable burnup at spatial separation of the two fuels. The neutron spectral shift was identified as the primary reason for the enhancement of burnup capabilities. Mutual resonance shielding of uranium and thorium is also a factor; however, it is small in magnitude. It is shown that the microheterogeneous fuel can achieve higher burnups, by up to 15%, than the reference all-uranium fuel. However, denaturing of the U-235 in the thorium portion of the fuel with small amounts of uranium significantly impairs this enhancement The denaturing is also necessary to meet conventional PWR thermal limits by improving the power share of the thorium region at the beginning of fuel irradiation. Meeting thermal-hydraulic design requirements by some of the microheterogeneous fuels while still meeting or exceeding the burnup of the all-uranium case is shown to be potentially feasible. However, the large power imbalance between the uranium and thorium regions creates several design challenges, such as higher fission gas release and cladding temperature gradients. A reduction of plutonium generation by a factor of 3 in comparison with all-uranium PWR fuel using the same initial U-235 content was estimated. In contrast to homogeneously mixed U-Th fuel, microheterogeneous fuel has a potential for economic performance comparable to the all-UO2 fuel provided that the microheterogeneous fuel incremental manufacturing costs are negligibly small.
C1 MIT, Ctr Adv Nucl Energy Syst, Dept Nucl Engn, Cambridge, MA 02139 USA.
Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA.
RP Shwageraus, E (reprint author), MIT, Ctr Adv Nucl Energy Syst, Dept Nucl Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
EM kazimi@mit.edu
RI Shwageraus, Eugene/D-5189-2012
OI Shwageraus, Eugene/0000-0002-7309-4920
NR 23
TC 10
Z9 10
U1 1
U2 3
PU AMER NUCLEAR SOCIETY
PI LA GRANGE PK
PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
J9 NUCL TECHNOL
JI Nucl. Technol.
PD JUL
PY 2004
VL 147
IS 1
BP 20
EP 36
PG 17
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 838JA
UT WOS:000222708300003
ER
PT J
AU Herring, JS
MacDonald, PE
Weaver, KD
AF Herring, JS
MacDonald, PE
Weaver, KD
TI Thorium-based transmuter fuels for light water reactors
SO NUCLEAR TECHNOLOGY
LA English
DT Article
DE transmutation; thorium fuels; inert-matrix fuels
AB A light water reactor (LWR) fuel cycle is proposed where the reactor core mainly consists of standard uranium-dioxide (UO2) fuel rods with typical U-235 enrichment, along with thoria-urania (ThO2-UO2) or yttria-stablized zirconia fertile-free fuel rods containing the plutonium and minor actinides typical of 30-yr old UO2 fuel in 1/9 to 1/3 of the positions. The goals of this mono-recycling strategy or "twice through fuel cycle" are to transmute the great majority of the long lived actinides in existing LWRs and to discharge a fuel form that is a very robust waste form and whose isotopic content is very proliferation resistant. The incorporation of plutonium into a ThO2 or yttria-stablized zirconia fertile-free matrix results in the consumption of already-separated plutonium without breeding significant additional Pu-239. The minor actinides (i.e., neptunium, americium, curium, berkelium, californium, etc.) are also included in the ThO2 or fertile-free transmuter fuel rods to further reduce the overall long-term radiotoxicity of the fuel cycle. Our analyses have shown that thorium-based or fertile-free fuels can reduce the amount of Pu-239 needing further transmutation or going to a repository by similar to90%. Also, thorium-based fuels produce a mixture of plutonium isotopes high in Pu-238. Because of the high decay heat and spontaneous neutron generation of Pu-238, this isotope provides intrinsic proliferation resistance.
C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA.
RP Herring, JS (reprint author), Idaho Natl Engn & Environm Lab, POB 1625, Idaho Falls, ID 83415 USA.
EM sth@inel.gov
NR 10
TC 14
Z9 14
U1 0
U2 2
PU AMER NUCLEAR SOCIETY
PI LA GRANGE PK
PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
J9 NUCL TECHNOL
JI Nucl. Technol.
PD JUL
PY 2004
VL 147
IS 1
BP 84
EP 101
PG 18
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 838JA
UT WOS:000222708300007
ER
PT J
AU Long, Y
Siefken, LJ
Hejzlar, P
Loewen, EP
Hohorst, JK
MacDonald, PE
Kazimi, MS
AF Long, Y
Siefken, LJ
Hejzlar, P
Loewen, EP
Hohorst, JK
MacDonald, PE
Kazimi, MS
TI The behavior of ThO2-based fuel rods during normal operation and
transient events in LWRs
SO NUCLEAR TECHNOLOGY
LA English
DT Article
DE thorium fuel performance; thorium fuel safety; advanced LWR fuel
ID ACCIDENT CONDITIONS
AB The thermal, mechanical, and chemical behavior of both thorium and uranium dioxide (ThO2-UO2) and thorium and plutonium dioxide (ThO2-PuO2)-based fuels during in-service and hypothetical accident conditions in light water reactors (LWRs) is described. These fuels offer the possibility for increased proliferation resistance and a reduction in the stockpile of weapons-grade and reactor-grade PuO2 as well as being a more stable waste form. The behavior is described for three different designs of ThO2-based fuels: a homogeneous mixture of ThO2-UO2, a microheterogeneous arrangement of the ThO2 and UO2, and a homogeneous mixture of ThO2-PuO2. The behavior was calculated with widely known LWR analysis tools extended for ThO2-based fuels: (a) MATPRO for calculating material properties, (b) FRAPCON-3 for calculating in-service fuel temperature and fission-gas release, (c) VIPRE-01 for calculating the possibility for departure from nucleate boiling, (d) HEATING7 for calculating in-service two-dimensional temperature distributions in microheterogeneous fuel, (e) SCDAP/RELAP5-3D for calculating the transient reactor system behavior and fuel behavior during loss-of-coolant accidents, and (f) FRAP-T6 for calculating the vulnerability of the cladding to cracking due to swelling of the fuel during hypothetical reactivity-initiated accidents.
The analytical tools accounted for the following differences in ThO2-based fuels relative to 100% UO2 fuel: (a) higher thermal conductivity, lower density and volumetric heat capacity, less thermal expansion, and higher melting point; (b) higher fission-gas production for U-233 fission than U-235 fission, but a lower gas diffusion coefficient in the ThO2 than in the UO2; (c) less plutonium accumulation at the rim of the fuel pellets; (d) greater decay heat; (e) microheterogeneous arrangement of fuel; and (f) more-negative moderator temperature and Doppler coefficients and a smaller delayed-neutron fraction. The newly developed models for ThO2 were checked against data from the light water breeder reactor program. Calculations by these analytical tools indicate that the in-service and transient performance of homogeneous ThO2-UO2-based fuels with respect to safety is generally equal to or better than that of 100% UO2 fuel. The in-service and transient temperatures in the most promising neutronic design of microheterogeneous ThO2-UO2-based fuel are greater than the temperatures in 100% UO2 fuel but are still within normal LWR safety limits. The reactor kinetics parameters for ThO2-PuO2-based fuel cause a higher transient reactor power for some postulated accidents, but in general, the margin of safety for ThO2-PuO2 fuels is equal to or greater than that in 100% UO2 fuels.
C1 MIT, Cambridge, MA 02139 USA.
Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA.
RP Long, Y (reprint author), MIT, 77 Massachusetts Ave,Room 24-215, Cambridge, MA 02139 USA.
EM kazimi@mit.edu
NR 45
TC 5
Z9 5
U1 1
U2 5
PU AMER NUCLEAR SOCIETY
PI LA GRANGE PK
PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
J9 NUCL TECHNOL
JI Nucl. Technol.
PD JUL
PY 2004
VL 147
IS 1
BP 120
EP 139
PG 20
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 838JA
UT WOS:000222708300010
ER
PT J
AU Demkowicz, PA
Jerden, JL
Cunnane, JC
Shibuya, N
Baney, R
Tulenko, J
AF Demkowicz, PA
Jerden, JL
Cunnane, JC
Shibuya, N
Baney, R
Tulenko, J
TI Aqueous dissolution of urania-thoria nuclear fuel
SO NUCLEAR TECHNOLOGY
LA English
DT Article
DE aqueous dissolution; urania-thoria fuel; spent-fuel disposal
ID GRAIN-BOUNDARY DIFFUSION; THO2-UO2 SOLID SOLUTION;
ELEVATED-TEMPERATURES; WATER REACTORS; DIOXIDE; CORROSION; BEHAVIOR;
LATTICE
AB The aqueous dissolution of irradiated and unirradiated uranium-thorium dioxide, (U, Th)O-2, fuel pellets in Yucca Mountain well water has been investigated. Whole and crushed pellets were reacted at 25 and 90degreesC for periods of up to 195 days. The fuel dissolution was measured by analyzing the concentrations of soluble uranium, thorium, and important fission products (Cs-137, (TC)-T-99, Np-237, Pu-239, Pu-240, and Am-241) in the well water. The surface-area-normalized fractional uranium release rates for unirradiated crushed uranium dioxide (UO2) pellets were 10 to 40 times higher than the values for (U,Th)O-2 fuel. Similarly, the dissolution rates of irradiated (U, Th)O-2 pellets with compositions ranging from 2.0 to 5.2% UO2 were at least two orders of magnitude lower than reported literature values for pure UO2. These results demonstrate an advantage of (U, Th) O-2 over UO2 in terms of matrix dissolution in groundwater and suggest that (U, Th)O-2 fuel is a more stable long-term waste form than conventional UO2 fuel.
C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA.
Argonne Natl Lab, Div Chem Engn, Argonne, IL 60439 USA.
Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA.
Univ Florida, Dept Nucl & Radiol Engn, Gainesville, FL 32611 USA.
RP Demkowicz, PA (reprint author), Idaho Natl Engn & Environm Lab, MS 3860,2525 N Fremont Ave, Idaho Falls, ID 83415 USA.
EM demkpa@inel.gov
NR 27
TC 9
Z9 9
U1 0
U2 4
PU AMER NUCLEAR SOCIETY
PI LA GRANGE PK
PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
J9 NUCL TECHNOL
JI Nucl. Technol.
PD JUL
PY 2004
VL 147
IS 1
BP 157
EP 170
PG 14
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 838JA
UT WOS:000222708300013
ER
PT J
AU Bailey, SM
Brenneman, MA
Goodwin, EH
AF Bailey, SM
Brenneman, MA
Goodwin, EH
TI Frequent recombination in telomeric DNA may extend the proliferative
life of telomerase-negative cells
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID DEPENDENT PROTEIN-KINASE; IN-SITU HYBRIDIZATION; POLY(ADP-RIBOSE)
POLYMERASE; HOMOLOGOUS RECOMBINATION; HUMAN-CHROMOSOMES;
SACCHAROMYCES-CEREVISIAE; IONIZING-RADIATION; IMMORTALIZED CELLS;
REPAIR; MAINTENANCE
AB For cells on the path to carcinogenesis, the key to unlimited growth potential lies in overcoming the steady loss of telomeric sequence commonly referred to as the 'end-replication problem' that occurs with each cell division. Most human tumors have reactivated telomerase, a specialized reverse transcriptase, that directs RNA-templated addition of telomeric repeats on to chromosomal termini. However, similar to10% of tumors maintain their telomeres through a recombination-based mechanism, termed alternative lengthening of telomeres or ALT. Here we demonstrate that telomeric DNA undergoes a high rate of a particular type of recombination visualized cytogenetically as sister chromatid exchange (SCE), and that this rate is dependent on genotype. A novel model of ALT is presented in which it is argued that telomeric exchanges, if they are unequal and occur at a sufficiently high frequency, will allow cells to proliferate indefinitely without polymerase-mediated extension of telomeric sequence.
C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
Colorado State Univ, Dept Environm & Radiol Hlth Sci, Ft Collins, CO 80523 USA.
Univ New Mexico, Sch Med, Dept Mol Genet & Microbiol, Albuquerque, NM 87131 USA.
Rutgers State Univ, Dept Genet, Piscataway, NJ 08854 USA.
RP Goodwin, EH (reprint author), Los Alamos Natl Lab, Biosci Div, MS M888, Los Alamos, NM 87545 USA.
EM egoodwin@lanl.gov
FU NCI NIH HHS [CA43322, CA77693, R01 CA043322, R01 CA077693]
NR 59
TC 147
Z9 153
U1 1
U2 7
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD JUL
PY 2004
VL 32
IS 12
BP 3743
EP 3751
DI 10.1093/nar/gkh691
PG 9
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 846UI
UT WOS:000223341900024
PM 15258249
ER
PT J
AU Frazer, KA
Pachter, L
Poliakov, A
Rubin, EM
Dubchak, I
AF Frazer, KA
Pachter, L
Poliakov, A
Rubin, EM
Dubchak, I
TI VISTA: computational tools for comparative genomics
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID DNA-SEQUENCE ALIGNMENTS; FACTOR-BINDING SITES; NONCODING SEQUENCES;
REGULATORY ELEMENT; MULTIPLE ALIGNMENT; KINESIN-II; MOUSE; GENES; RAT
AB Comparison of DNA sequences from different species is a fundamental method for identifying functional elements in genomes. Here, we describe the VISTA family of tools created to assist biologists in carrying out this task. Our first VISTA server at http://www-gsd.lbl.gov/vista/ was launched in the summer of 2000 and was designed to align long genomic sequences and visualize these alignments with associated functional annotations. Currently the VISTA site includes multiple comparative genomics tools and provides users with rich capabilities to browse pre-computed whole-genome alignments of large vertebrate genomes and other groups of organisms with VISTA Browser, to submit their own sequences of interest to several VISTA servers for various types of comparative analysis and to obtain detailed comparative analysis results for a set of cardiovascular genes. We illustrate capabilities of the VISTA site by the analysis of a 180 kb interval on human chromosome 5 that encodes for the kinesin family member 3A (KIF3A) protein.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Gen Div, Berkeley, CA 94720 USA.
Perlegen Sci Inc, Mountain View, CA 94043 USA.
Univ Calif Berkeley, Dept Math, Berkeley, CA 94720 USA.
Dept Energy Joint Genome Inst, Walnut Creek, CA 94598 USA.
RP Dubchak, I (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Gen Div, MS 84-171, Berkeley, CA 94720 USA.
EM ildubchak@lbl.gov
NR 34
TC 595
Z9 601
U1 4
U2 19
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD JUL 1
PY 2004
VL 32
SU 2
BP W273
EP W279
DI 10.1093/nar/gkh458
PG 7
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 832NB
UT WOS:000222273100056
PM 15215394
ER
PT J
AU Guo, JT
Ellrott, K
Chung, WJ
Xu, D
Passovets, S
Xu, Y
AF Guo, JT
Ellrott, K
Chung, WJ
Xu, D
Passovets, S
Xu, Y
TI PROSPECT-PSPP: an automatic computational pipeline for protein structure
prediction
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID GENOME-SCALE; CLASSIFICATION; DATABASE; PROGRAM; DESIGN
AB Knowledge of the detailed structure of a protein is crucial to our understanding of the biological functions of that protein. The gap between the number of solved protein structures and the number of protein sequences continues to widen rapidly in the post-genomics era due to long and expensive processes for solving structures experimentally. Computational prediction of structures from amino acid sequence has come to play a key role in narrowing the gap and has been successful in providing useful information for the biological research community. We have developed a prediction pipeline, PROSPECT-PSPP, an integration of multiple computational tools, for fully automated protein structure prediction. The pipeline consists of tools for (i) preprocessing of protein sequences, which includes signal peptide prediction, protein type prediction (membrane or soluble) and protein domain partition, (ii) secondary structure prediction, (iii) fold recognition and (iv) atomic structural model generation. The centerpiece of the pipeline is our threading-based program PROSPECT. The pipeline is implemented using SOAP (Simple Object Access Protocol), which makes it easier to share our tools and resources. The pipeline has an easy-to-use user interface and is implemented on a 64-node dual processor Linux cluster. It can be used for genome-scale protein structure prediction. The pipeline is accessible at http://csbl.bmb.uga.edu/protein_pipeline.
C1 Univ Georgia, Dept Biochem & Mol Biol, Athens, GA 30606 USA.
Univ Missouri, Dept Comp Sci, Columbia, MO 65211 USA.
Oak Ridge Natl Lab, Computat Biol Inst, Oak Ridge, TN 37831 USA.
RP Xu, Y (reprint author), Univ Georgia, Dept Biochem & Mol Biol, Athens, GA 30606 USA.
EM xyn@bmb.uga.edu
OI Ellrott, Kyle/0000-0002-6573-5900
NR 17
TC 9
Z9 12
U1 0
U2 0
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD JUL 1
PY 2004
VL 32
SU 2
BP W522
EP W525
DI 10.1093/nar/gkh414
PG 4
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 832NB
UT WOS:000222273100103
PM 15215441
ER
PT J
AU Loots, GG
Ovcharenko, I
AF Loots, GG
Ovcharenko, I
TI rVISTA 2.0: evolutionary analysis of transcription factor binding sites
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID GENOME; SEQUENCE
AB Identifying and characterizing the transcription factor binding site (TFBS) patterns of cis-regulatory elements represents a challenge, but holds promise to reveal the regulatory language the genome uses to dictate transcriptional dynamics. Several studies have demonstrated that regulatory modules are under positive selection and, therefore, are often conserved between related species. Using this evolutionary principle, we have created a comparative tool, rVISTA, for analyzing the regulatory potential of noncoding sequences. Our ability to experimentally identify functional noncoding sequences is extremely limited, therefore, rVISTA attempts to fill this great gap in genomic analysis by offering a powerful approach for eliminating TFBSs least likely to be biologically relevant. The rVISTA tool combines TFBS predictions, sequence comparisons and cluster analysis to identify noncoding DNA regions that are evolutionarily conserved and present in a specific configuration within genomic sequences. Here, we present the newly developed version 2.0 of the rVISTA tool, which can process alignments generated by both the zPicture and blastz alignment programs or use pre-computed pairwise alignments of several vertebrate genomes available from the ECR Browser and GALA database. The rVISTA web server is closely interconnected with the TRANSFAC database, allowing users to either search for matrices present in the TRANSFAC library collection or search for user-defined consensus sequences. The rVISTA tool is publicly available at http://rvista.dcode.org/.
C1 Lawrence Livermore Natl Lab, EEBI Comp Div, Livermore, CA 94550 USA.
Lawrence Livermore Natl Lab, Genome Biol Div, Livermore, CA 94550 USA.
RP Ovcharenko, I (reprint author), Lawrence Livermore Natl Lab, EEBI Comp Div, 7000 East Ave,L-441, Livermore, CA 94550 USA.
EM loots1@llnl.gov; ovcharenko1@llnl.gov
RI Phelps, Steve/H-2263-2011
NR 12
TC 266
Z9 275
U1 0
U2 7
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD JUL 1
PY 2004
VL 32
SU 2
BP W217
EP W221
DI 10.1093/nar/gkh383
PG 5
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 832NB
UT WOS:000222273100046
PM 15215384
ER
PT J
AU O'Connor, BD
Yeates, TO
AF O'Connor, BD
Yeates, TO
TI GDAP: a web tool for genome-wide protein disulfide bond prediction
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
AB The Genomic Disulfide Analysis Program (GDAP) provides web access to computationally predicted protein disulfide bonds for over one hundred microbial genomes, including both bacterial and achaeal species. In the GDAP process, sequences of unknown structure are mapped, when possible, to known homologous Protein Data Bank (PDB) structures, after which specific distance criteria are applied to predict disulfide bonds. GDAP also accepts user-supplied protein sequences and subsequently queries the PDB sequence database for the best matches, scans for possible disulfide bonds and returns the results to the client. These predictions are useful for a variety of applications and have previously been used to show a dramatic preference in certain thermophilic archaea and bacteria for disulfide bonds within intracellular proteins. Given the central role these stabilizing, covalent bonds play in such organisms, the predictions available from GDAP provide a rich data source for designing site-directed mutants with more stable thermal profiles. The GDAP web application is a gateway to this information and can be used to understand the role disulfide bonds play in protein stability both in these unusual organisms and in sequences of interest to the individual researcher. The prediction server can be accessed at http://www.doe-mbi.ucla.edu/Services/GDAP.
C1 Univ Calif Los Angeles, DOE, Inst Gen & Proteo, Los Angeles, CA 90024 USA.
Univ Calif Los Angeles, Inst Mol Biol, Los Angeles, CA 90024 USA.
Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90024 USA.
RP Yeates, TO (reprint author), Univ Calif Los Angeles, DOE, Inst Gen & Proteo, Los Angeles, CA 90024 USA.
EM yeates@mbi.ucla.edu
OI Yeates, Todd/0000-0001-5709-9839
FU NIGMS NIH HHS [T32 GM007185]
NR 11
TC 20
Z9 22
U1 0
U2 2
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD JUL 1
PY 2004
VL 32
SU 2
BP W360
EP W364
DI 10.1093/nar/gkh376
PG 5
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 832NB
UT WOS:000222273100073
PM 15215411
ER
PT J
AU Ovcharenko, I
Nobrega, MA
Loots, GG
Stubbs, L
AF Ovcharenko, I
Nobrega, MA
Loots, GG
Stubbs, L
TI ECR Browser: a tool for visualizing and accessing data from comparisons
of multiple vertebrate genomes
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID SEQUENCE ALIGNMENTS; BINDING SITES; DNA; REGIONS; IDENTIFICATION;
CONSERVATION; CLUSTERS
AB With an increasing number of vertebrate genomes being sequenced in draft or finished form, unique opportunities for decoding the language of DNA sequence through comparative genome alignments have arisen. However, novel tools and strategies are required to accommodate this large volume of genomic information and to facilitate the transfer of predictions generated by comparative sequence alignment to researchers focused on experimental annotation of genome function. Here, we present the ECR Browser, a tool that provides easy and dynamic access to whole genome alignments of human, mouse, rat and fish sequences. This web-based tool (http://ecrbrowser.dcode.org) provides the starting point for discovery of novel genes, identification of distant gene regulatory elements and prediction of transcription factor binding sites. The genome alignment portal of the ECR Browser also permits fast and automated alignments of any user-submitted sequence to the genome of choice. The interconnection of the ECR Browser with other DNA sequence analysis tools creates a unique portal for studying and exploring vertebrate genomes.
C1 Lawrence Livermore Natl Lab, Genome Biol Div, Livermore, CA 94550 USA.
Lawrence Livermore Natl Lab, Energy Environm Biol & Inst Comp, Livermore, CA 94550 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Genome Sci, Berkeley, CA 94720 USA.
RP Ovcharenko, I (reprint author), Lawrence Livermore Natl Lab, Genome Biol Div, Livermore, CA 94550 USA.
EM ovcharenko1@llnl.gov; stubbs5@llnl.gov
OI Stubbs, Lisa/0000-0002-9556-1972
NR 31
TC 271
Z9 280
U1 2
U2 8
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD JUL 1
PY 2004
VL 32
SU 2
BP W280
EP W286
DI 10.1093/nar/gkh355
PG 7
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 832NB
UT WOS:000222273100057
PM 15215395
ER
PT J
AU Sharan, R
Ben-Hur, A
Loots, GG
Ovcharenko, I
AF Sharan, R
Ben-Hur, A
Loots, GG
Ovcharenko, I
TI CREME: Cis-Regulatory Module Explorer for the human genome
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID STATISTICAL SIGNIFICANCE; GENE-EXPRESSION; IDENTIFICATION; SEQUENCES;
SITES
AB The binding of transcription factors to specific regulatory sequence elements is a primary mechanism for controlling gene transcription. Eukaryotic genes are often regulated by several transcription factors whose binding sites are tightly clustered and form cis-regulatory modules. In this paper, we present a web server, CREME, for identifying and visualizing cis-regulatory modules in the promoter regions of a given set of potentially co-regulated genes. CREME relies on a database of putative transcription factor binding sites that have been annotated across the human genome using a library of position weight matrices and evolutionary conservation with the mouse and rat genomes. A search algorithm is applied to this data set to identify combinations of transcription factors whose binding sites tend to co-occur in close proximity in the promoter regions of the input gene set. The identified cis-regulatory modules are statistically scored and significant combinations are reported and graphically visualized. Our web server is available at http://creme.dcode.org.
C1 Int Comp Sci Inst, Berkeley, CA 94704 USA.
Stanford Univ, Dept Biochem, Stanford, CA 94305 USA.
Lawrence Livermore Natl Lab, EEBI Div, Livermore, CA 94550 USA.
Lawrence Livermore Natl Lab, Genome Biol Div, Livermore, CA 94550 USA.
RP Sharan, R (reprint author), Int Comp Sci Inst, 1947 Ctr St, Berkeley, CA 94704 USA.
EM roded@icsi.berkeley.edu; ovcharenko1@lnl.gov
NR 17
TC 39
Z9 41
U1 0
U2 0
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD JUL 1
PY 2004
VL 32
SU 2
BP W253
EP W256
DI 10.1093/nar/gkh385
PG 4
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 832NB
UT WOS:000222273100052
PM 15215390
ER
PT J
AU Han, SH
Belkin, MA
Shen, YR
AF Han, SH
Belkin, MA
Shen, YR
TI Optically active second-harmonic generation from a uniaxial fluid medium
SO OPTICS LETTERS
LA English
DT Article
ID HARMONIC-GENERATION; SPECTROSCOPY
AB We have shown that optically active second-harmonic generation is allowed in a uniaxial fluid medium. A homeotropically aligned chiral smectic. A liquid crystal was used as an example. Phase matching was achievable by angle tuning. Chiral nonlinear susceptibility for the liquid crystal was deduced. The signal dropped precipitously as the sample underwent the transition from smectic-A to isotropic. (C) 2004 Optical Society of America.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Han, SH (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM shenyr@socrates.berkeley.edu
RI Belkin, Mikhail/E-9041-2013
OI Belkin, Mikhail/0000-0003-3172-9462
NR 10
TC 3
Z9 3
U1 0
U2 5
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD JUL 1
PY 2004
VL 29
IS 13
BP 1527
EP 1529
DI 10.1364/OL.29.001527
PG 3
WC Optics
SC Optics
GA 830OV
UT WOS:000222133100031
PM 15259735
ER
PT J
AU Gorbarenko, SA
Southon, JR
Keigwin, LD
Cherepanova, MV
Gvozdeva, IG
AF Gorbarenko, SA
Southon, JR
Keigwin, LD
Cherepanova, MV
Gvozdeva, IG
TI Late Pleistocene-Holocene oceanographic variability in the Okhotsk Sea:
geochemical, lithological and paleontological evidence
SO PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
LA English
DT Article; Proceedings Paper
CT Symposium on High Latitude Eurasian Paleoenvironments
CY MAY, 2002
CL Moscow, RUSSIA
SP IGBP PAGES
DE The Okhotsk Sea; paleoenvironment; Late Pleistocene; hydrological and
lithodynamical oscillations
ID UPPER-QUATERNARY SEDIMENTS; NORTH-ATLANTIC; NORTHWESTERN PACIFIC; OCEAN;
ICE; CLIMATE; WATER; ISOTOPE; RECORD
AB Sedimentary, geochemical and paleontological data, extracted from a sediment core taken from the central Okhotsk Sea, record climatic and sedimentary changes over the past 100 ky. Benthic foraminiferal oxygen isotope record and accelerator mass spectrometry (AMS) 14 C data provide the basis for the core age chronology. Planktonic and benthic foraminiferal delta(18)O and delta(13)C measurements, magnetic susceptibility, ice rafted debris and coarse fraction content, carbonate and organic carbon content, and diatom and pollen spectra show major changes in regional climate, sea surface conditions, ice extent and sedimentary regime, which are correlated with the global glacial-interglacial changes of marine isotope stages (MIS) I through 5.3. Regional cooling and intensification of winter sea ice formation during the last glaciation increased the northern shelf surface water density and Sea of Okhotsk Intermediate Water (SOIW) formation. In addition to major Milankovitch-scale changes, lithological, geochemical and paleontological indices also show suborbital oscillations in Okhotsk Sea hydrology, sedimentation and regional climate. These shorter-term oscillations are characterized by coupled maxima in ice rafted debris and sediment coarse fraction (lithodynamic indices, LDI) values and most are associated with cold events involving enhanced winter ice formation and intensification of SOIW and North Pacific intermediate water (NPIW) formation. The terminations of LDI maxima were induced by climate warming and reductions in ice formation, and were accompanied by sharp decreases in planktonic foraminiferal delta(18)O. During the glacial terminations of MIS 2 and 4, however, the onset of suborbital-scale LDI maxima occurs close to sharp negative delta(18)O shifts in planktonic foraminifera (delta(18)Opf) associated with climate warming. In these special cases, the LDI maxima occurred under warm climate and rising sea levels and did not lead to increases in SOIW or NPIW ventilation. (C) 2004 Elsevier B.V. All rights reserved.
C1 Russian Acad Sci, Pacific Oceanol Inst, Vladivostok 690041, Russia.
Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA.
FEBRAS, Inst Biol & Soil Sci, Vladivostok 690022, Russia.
RP Gorbarenko, SA (reprint author), Russian Acad Sci, Pacific Oceanol Inst, Baltiysakaya St 43, Vladivostok 690041, Russia.
EM gorbarenko@poi.dvo.ru; Southon1@llnl.gov; lkeigwin@whoi.edu;
evolut@eastnet.febras.ru
RI Cherepanova, Marina/L-3264-2016
OI Cherepanova, Marina/0000-0002-6530-0093
NR 53
TC 43
Z9 56
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0031-0182
J9 PALAEOGEOGR PALAEOCL
JI Paleogeogr. Paleoclimatol. Paleoecol.
PD JUL
PY 2004
VL 209
IS 1-4
BP 281
EP 301
DI 10.1016/j.palaeo.2004.02.013
PG 21
WC Geography, Physical; Geosciences, Multidisciplinary; Paleontology
SC Physical Geography; Geology; Paleontology
GA 836GP
UT WOS:000222544100018
ER
PT J
AU Ravindran, P
Anand, NK
Massoudi, M
AF Ravindran, P
Anand, NK
Massoudi, M
TI Steady free surface flow of a fluid-solid mixture down an inclined plane
SO PARTICULATE SCIENCE AND TECHNOLOGY
LA English
DT Article
DE continuum theory; mixtures; inclined fully developed flow; granular
materials; multiphase flows
ID NON-LINEAR DIFFUSION; GRANULAR-MATERIALS; CONSTITUTIVE EQUATIONS; MEDIA;
LIFT
AB The present work is all extension of the investigations performed by Massoudi and Anand (2001). The free surface flow problem is studied here. Numerical solutions for steady free surface flow of a solid-fluid mixture down all inclined plane are presented. The problem is formulated using the mixture theory framework. The resulting set of three coupled nonlinear differential equations is nondimensionalized. A parametric study is conducted to understand the influence of the dimensionless numbers oil the velocity, and volume fraction. The maximum fluid velocity is found to decrease with increase in the ratio of the drag force to the viscous forces within the fluid phase (D-1). The fluid phase velocity was found to decrease with increase in the ratio of the drag force to viscous force within the solid component (D-2), and the corresponding solid phase velocity was found to increase.
C1 US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA.
RP Massoudi, M (reprint author), US DOE, Natl Energy Technol Lab, POB 10940, Pittsburgh, PA 15236 USA.
EM massoudi@netl.doe.gov
RI Ravindran, Parag/B-8363-2011
OI Ravindran, Parag/0000-0002-1379-4239
NR 30
TC 7
Z9 7
U1 0
U2 0
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0272-6351
J9 PARTICUL SCI TECHNOL
JI Part. Sci. Technol.
PD JUL-SEP
PY 2004
VL 22
IS 3
BP 253
EP 273
DI 10.1080/02726350490501529
PG 21
WC Engineering, Chemical
SC Engineering
GA 861AQ
UT WOS:000224388900003
ER
PT J
AU Bergmann, U
Groenzin, H
Mullins, OC
Glatzel, P
Fetzer, J
Cramer, SP
AF Bergmann, U
Groenzin, H
Mullins, OC
Glatzel, P
Fetzer, J
Cramer, SP
TI X-ray Raman spectroscopy - A new tool to study local structure of
aromatic hydrocarbons and asphaltenes
SO PETROLEUM SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT International Conference on Heavy Organics Deposition
CY NOV 17-21, 2002
CL Puerto Vallarta, MEXICO
ID HOMO-LUMO GAP; K-EDGE; PETROLEUM ASPHALTENES; ELECTRONIC-STRUCTURE;
ABSORPTION-SPECTRA; SHAPE RESONANCES; BOND LENGTHS; SCATTERING; CARBON;
NEXAFS
AB Polycyclic aromatic hydrocarbons (PAHs) are essential components in numerous natural and man made organic compounds. In asphaltenes, knowledge of the electronic structure of both its aromatic and aliphatic components is of crucial importance, when trying to understand and predict its macroscopic properties. Theoretical studies of complex PAHs have led to simple rules to describe their Tu electron distribution, but systematic experimental support is still needed. A novel approach to directly probe carbon type in PAHs is described here, namely the technique of X-ray Raman spectroscopy (XRS). Conventional X-ray absorption spectroscopy (XAS) has been used for many years for element specific characterization of local structure and chemistry. However, in the soft X-ray region (relevant for light elements) its application to numerous carbonaceous systems including asphaltenes encounters problems. Most of the difficulties, including surface sensitivity and restricted sample environments, stem from the submicron path lengths of soft X-rays and/or electrons. XRS provides a means for obtaining the information content of soft X-ray absorption spectra while maintaining the experimental benefits of hard X-ray techniques (similar tomm path length). In the XRS process an incident photon is inelastically scattered and part of its energy is transferred to excite an inner shell electron into an unoccupied state. Under the dipole approximation, the resulting features are identical to the corresponding XAS spectrum. In the past, the extremely low cross-section of XRS has made this technique impractical, but intense new X-ray facilities and improvements in X-ray optics have helped to advance this unique spectroscopic tool. We have applied XRS to a series of PAHs and several asphaltenes. The results directly support the simple ideas contained in the "sextet-double bond" description of PAHs. Furthermore, we show that XRS can probe the geometrry of aromatic ring systems in asphaltenes, as well as its ratio of aromatic and aliphatic constituents.
C1 Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA.
Schlumberger Doll Res Ctr, Ridgefield, CT 06877 USA.
ChevronTexaco Energy Res & Technol Co, Richmond, CA USA.
RP Bergmann, U (reprint author), Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
EM ubergmann@lbl.gov
RI Glatzel, Pieter/E-9958-2010; ID, BioCAT/D-2459-2012
OI Glatzel, Pieter/0000-0001-6532-8144;
NR 45
TC 16
Z9 16
U1 0
U2 19
PU MARCEL DEKKER INC
PI NEW YORK
PA 270 MADISON AVE, NEW YORK, NY 10016 USA
SN 1091-6466
J9 PETROL SCI TECHNOL
JI Pet. Sci. Technol.
PD JUL
PY 2004
VL 22
IS 7-8
BP 863
EP 875
DI 10.1081/LFT-120038722
PG 13
WC Energy & Fuels; Engineering, Chemical; Engineering, Petroleum
SC Energy & Fuels; Engineering
GA 842BO
UT WOS:000222977700010
ER
PT J
AU Diallo, MS
Strachan, A
Faulon, JL
Goddard, WA
AF Diallo, MS
Strachan, A
Faulon, JL
Goddard, WA
TI Thermodynamic properties of asphaltenes through computer assisted
structure elucidation and atomistic simulations. 1. Bulk Arabian light
asphaltenes
SO PETROLEUM SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT International Conference on Heavy Organics Deposition
CY NOV 17-21, 2002
CL Puerto Vallarta, MEXICO
ID MOLECULAR-DYNAMICS SIMULATIONS; PETROLEUM ASPHALTENES; CRUDE-OIL; MODEL;
SPECTROSCOPY; TEMPERATURE; EMULSIONS; STABILITY; PRESSURE; BEHAVIOR
AB This article describes a new method for estimating the thermodynamic properties of asphaltenes. To illustrate this methodology, we used a computer assisted structure elucidation software (SIGNATURE) to generate an ensemble of 10 isomers for Arabian Light (AL) asphaltenes compatible with (i) analytical data from elemental analysis, FT-IR spectroscopy, 1-D H-1/C-13 solution NMR and vapor pressure osmometry and (ii) literature data on the molecular composition of asphaltenes. The 10 model isomers were packed into a 3-D periodic cell to form the condensed phase model for the fraction of bulk AL asphaltenes with a number average molar mass (M.) approximately equal to 1280 Dalton. This cell was subsequently used in molecular dynamics (MD) simulations to estimate the molar volume, density, enthalpy, specific heat at constant pressure, solubility parameter, and isothermal compressibility of the AL asphaltene fraction. The results of the MD simulations compare favorably with the available experimental data.
C1 CALTECH, Beckman Inst, Mat & Proc Simulat Ctr, Pasadena, CA 91125 USA.
Howard Univ, Dept Civil Engn, Washington, DC 20059 USA.
Sandia Natl Labs, Computat Biol & Evolutionary Comp Dept, Livermore, CA 94550 USA.
RP Diallo, MS (reprint author), CALTECH, Beckman Inst, Mat & Proc Simulat Ctr, MC 139-74, Pasadena, CA 91125 USA.
EM diallo@wag.caltech.edu; wag@wag.caltech.edu
NR 35
TC 11
Z9 11
U1 1
U2 5
PU MARCEL DEKKER INC
PI NEW YORK
PA 270 MADISON AVE, NEW YORK, NY 10016 USA
SN 1091-6466
J9 PETROL SCI TECHNOL
JI Pet. Sci. Technol.
PD JUL
PY 2004
VL 22
IS 7-8
BP 877
EP 899
DI 10.1081/LFT-120040254
PG 23
WC Energy & Fuels; Engineering, Chemical; Engineering, Petroleum
SC Energy & Fuels; Engineering
GA 842BO
UT WOS:000222977700011
ER
PT J
AU Schmiedeshoff, GM
Dulguerova, D
Quan, J
Touton, S
Mielke, CH
Christianson, AD
Lacerda, AH
Palm, E
Hannahs, ST
Murphy, T
Gay, EC
McPheeters, CC
Thoma, DJ
Hults, WL
Cooley, JC
Kelly, AM
Hanrahan, RJ
Smith, JL
AF Schmiedeshoff, GM
Dulguerova, D
Quan, J
Touton, S
Mielke, CH
Christianson, AD
Lacerda, AH
Palm, E
Hannahs, ST
Murphy, T
Gay, EC
McPheeters, CC
Thoma, DJ
Hults, WL
Cooley, JC
Kelly, AM
Hanrahan, RJ
Smith, JL
TI Magnetotransport and superconductivity of alpha-uranium
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID HIGH-FIELD SUPERCONDUCTORS; CHARGE-DENSITY-WAVE; ELECTRICAL-RESISTIVITY;
TEMPERATURE; IMPURITIES; BEHAVIOR; METALS; SPIN
AB We have measured the electrical resistivity, magnetoresistance and Hall effect on several new single-crystal samples and one polycrystalline sample of alpha-U. The residual resistivity ratios of these samples vary from 13 to 315. Matthiessen's law appears to hold above the onset of the charge-density wave phase transitions that begin near 43 K, but not below this temperature. Sharp features at all three charge-density wave transitions are observed and the effects of high magnetic fields on them are presented and discussed. The magnetoresistance is anisotropic, reaches 1000% at 2K and 18 T and does not exhibit Kohler scaling. The Hall coefficient is positive, independent of magnetic field and slightly temperature dependent above about 40K in agreement with earlier studies. Below 40K the Hall coefficient changes sign as the temperature falls, varies with field and becomes much more strongly negative at the lowest temperatures than has been reported. Some of our results suggest that a spin-density wave may coexist with the charge-density wave states. Superconductivity is observed in two of our samples; we argue that it is intrinsic to alpha-U and suggest that it is consistent with a two-band model. Several parameters characterizing the transport and superconductivity of alpha-U are estimated.
C1 Occidental Coll, Dept Phys, Los Angeles, CA 90041 USA.
Los Alamos Natl Lab, Pulse Facil, Natl Magnet Field Lab, Los Alamos, NM 87545 USA.
Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
Argonne Natl Lab, Argonne, IL 60439 USA.
RP Schmiedeshoff, GM (reprint author), Occidental Coll, Dept Phys, Los Angeles, CA 90041 USA.
EM gms@oxy.edu
RI Hannahs, Scott/B-1274-2008; Cooley, Jason/E-4163-2013; christianson,
andrew/A-3277-2016; Mielke, Charles/S-6827-2016
OI Hannahs, Scott/0000-0002-5840-7714; christianson,
andrew/0000-0003-3369-5884; Mielke, Charles/0000-0002-2096-5411
NR 35
TC 9
Z9 9
U1 0
U2 4
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6443
J9 PHILOS MAG
JI Philos. Mag.
PD JUL 1
PY 2004
VL 84
IS 19
BP 2001
EP 2022
DI 10.1080/14786430410001663231
PG 22
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 829EZ
UT WOS:000222030300007
ER
PT J
AU Zhan, GD
Kuntz, JD
Wang, H
Wang, CM
Mukherjee, AK
AF Zhan, GD
Kuntz, JD
Wang, H
Wang, CM
Mukherjee, AK
TI Anisotropic thermal properties of single-wall-carbon-nanotube-reinforced
nanoceramics
SO PHILOSOPHICAL MAGAZINE LETTERS
LA English
DT Article
ID ROPES; NANOCOMPOSITES; CONDUCTIVITY; GROWTH
AB Dense single-wall-carbon-nanotube-(SWCNT)-reinforced alumina nanocomposites have been fabricated by a novel spark-plasma-sintering technique. Anisotropic thermal properties have been found in carbon nanotube composites. The introduction of ropes of SWCNTs gives rise to a decrease in the transverse thermal diffusivity with increasing carbon nanotube content while it does not change the in-plane thermal diffusivity. This is scientifically interesting and technologically important for the development of materials for novel thermal barrier coatings.
C1 Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA.
Pacific NW Natl Lab, Enivronm Mol Sci Lab, Richland, WA 99352 USA.
RP Mukherjee, AK (reprint author), Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
EM akmukherjee@ucdavis.edu
RI Wang, Hsin/A-1942-2013
OI Wang, Hsin/0000-0003-2426-9867
NR 17
TC 23
Z9 23
U1 2
U2 13
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0950-0839
EI 1362-3036
J9 PHIL MAG LETT
JI Philos. Mag. Lett.
PD JUL
PY 2004
VL 84
IS 7
BP 419
EP 423
DI 10.1080/09500830410001728345
PG 5
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 858ME
UT WOS:000224195100001
ER
PT J
AU Hiratani, M
Bulatov, VV
AF Hiratani, M
Bulatov, VV
TI Solid-solution hardening by point-like obstacles of different kinds
SO PHILOSOPHICAL MAGAZINE LETTERS
LA English
DT Article
ID DISLOCATION GLIDE; RANDOM ARRAY; CRYSTALS; METALS; FCC
AB The critical resolved shear stress (CRSS) for a dislocation percolating through penetrable obstacles with different pinning strength is derived analytically. The stability of dislocation-obstacle configurations is determined by evaluating the configurational entropy. The analytical results imply a superposition law for the concentration of pinning obstacles on the dislocation line, and a Pythagorean-type hardening rule for the CRSS when obstacle strengths are weak and nearly the same. For comparison with derived results, discrete dislocation dynamics simulations are performed for irradiated iron.
C1 Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA.
RP Hiratani, M (reprint author), Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA.
EM hiratani1@llnl.gov
NR 17
TC 15
Z9 15
U1 1
U2 8
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0950-0839
J9 PHIL MAG LETT
JI Philos. Mag. Lett.
PD JUL
PY 2004
VL 84
IS 7
BP 461
EP 470
DI 10.1080/09500830410001726969
PG 10
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 858ME
UT WOS:000224195100006
ER
PT J
AU Anderson, S
Srajer, V
Moffat, K
AF Anderson, S
Srajer, V
Moffat, K
TI Structural heterogeneity of cryotrapped intermediates in the bacterial
blue light photoreceptor, photoactive yellow protein
SO PHOTOCHEMISTRY AND PHOTOBIOLOGY
LA English
DT Article
ID ECTOTHIORHODOSPIRA-HALOPHILA; ANGSTROM RESOLUTION; SPECTROSCOPY;
PHOTOCYCLE; PHOTOREACTION; EXPRESSION; RADIATION; DAMAGE; CYCLE
AB We investigate by X-ray crystallographic techniques the cryo-trapped states that accumulate on controlled illumination of the blue light photoreceptor, photoactive yellow protein (PYP), at 110 K in both the wild-type species and its E46Q mutant. These states are related to those that occur during the chromophore isomerization process in the PYP photocycle at room temperature. The structures present in such states were determined at high resolution, 0.95-1.05Angstrom. In both wild type and mutant PYP, the cryotrapped state is not composed of a single, quasitransition state structure but rather of a heterogeneous mixture of three species in addition to the ground state structure. We identify and refine these three photoactivated species under the assumption that the structural changes are limited to simple isomerization events of the chromophore that otherwise retains chemical bonding similar to that in the ground state. The refined chromophore models are essentially identical in the wild type and the E46Q mutant, which implies that the early stages of their photocycle mechanisms are the same.
C1 Univ Chicago, Dept Biochem & Mol Biol, Chicago, IL 60637 USA.
Univ Chicago, Consortium Adv Radiat Sources, Chicago, IL 60637 USA.
Univ Chicago, Inst Biophys Dynam, Chicago, IL 60637 USA.
RP Anderson, S (reprint author), Univ Chicago, Argonne Natl Lab, CARS, Bldg 434-B,9700 S Cass Ave, Argonne, IL 60439 USA.
EM smander@midway.uchicago.edu
FU NCRR NIH HHS [RR 07707]; NIGMS NIH HHS [GM 36452]
NR 23
TC 22
Z9 22
U1 0
U2 3
PU AMER SOC PHOTOBIOLOGY
PI AUGUSTA
PA BIOTECH PARK, 1021 15TH ST, SUITE 9, AUGUSTA, GA 30901-3158 USA
SN 0031-8655
J9 PHOTOCHEM PHOTOBIOL
JI Photochem. Photobiol.
PD JUL-AUG
PY 2004
VL 80
IS 1
BP 7
EP 14
DI 10.1562/2004-03-15-RA-115.1
PG 8
WC Biochemistry & Molecular Biology; Biophysics
SC Biochemistry & Molecular Biology; Biophysics
GA 849EC
UT WOS:000223520500003
PM 15339224
ER
PT J
AU Hu, SX
Collins, LA
AF Hu, SX
Collins, LA
TI Intense laser-induced recombination: The inverse above-threshold
ionization process
SO PHYSICAL REVIEW A
LA English
DT Article
ID STIMULATED RADIATIVE RECOMBINATION; ELECTRON-ION RECOMBINATION; HIGH
HARMONIC-GENERATION; MULTIPHOTON IONIZATION; FIELD; ATOMS; INTERFERENCE;
PULSES; TRANSITIONS; SCATTERING
AB We investigated the recombination of electrons with ions in an ultrashort, intense laser pulse by numerically solving the time-dependent Schrodinger equation. The inverse above-threshold ionization (IATI) phenomenon, which shows the recombination probability peaked at specific energies of the injected electron wave packet, is explicitly elucidated. Furthermore, these IATI peaks which are separated by the laser photon energy also show up in processes of recombination to excited states.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Hu, SX (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM suxing@lanl.gov; lac@lanl.gov
RI Hu, Suxing/A-1265-2007
OI Hu, Suxing/0000-0003-2465-3818
NR 47
TC 16
Z9 16
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
EI 1094-1622
J9 PHYS REV A
JI Phys. Rev. A
PD JUL
PY 2004
VL 70
IS 1
AR 013407
DI 10.1103/PhysRevA.70.013407
PG 7
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 845VK
UT WOS:000223273200080
ER
PT J
AU Jones, S
Macek, JH
Madison, DH
AF Jones, S
Macek, JH
Madison, DH
TI Test of the Pluvinage wave function for the helium ground state
SO PHYSICAL REVIEW A
LA English
DT Article
ID DIFFERENTIAL CROSS-SECTIONS; DOUBLE-IONIZATION; COMPTON-SCATTERING;
DOUBLE PHOTOIONIZATION; ELECTRON-CAPTURE; ION IMPACT; HYDROGEN; SYSTEMS;
ATOMS; HE
AB The accuracy of the Pluvinage wave function for the ground state of helium is investigated by considering a number of different physical processes including double ionization by photoabsorption, Compton scattering, and electron impact. In the high-energy limit of these processes, the accuracy of the initial ground state can be ascertained without reference to the final double-continuum state. In this limit, we find that a Hylleraas description is superior to the Pluvinage one. For intermediate energies, final-state correlation becomes important, so we employ a 3C description of the final state (the 3C wave function is the double-continuum analog of the Pluvinage wave function). In this case, however, better agreement with experiment is obtained with the Pluvinage initial state. A possible explanation for this seemingly paradoxical result is suggested.
C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
Univ Missouri, Lab Atom Mol & Opt Res, Dept Phys, Rolla, MO 65409 USA.
RP Jones, S (reprint author), Univ Missouri, Dept Phys, Rolla, MO 65409 USA.
NR 32
TC 19
Z9 19
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 JUL
PY 2004
VL 70
IS 1
AR 012712
DI 10.1103/PhysRevA.70.012712
PG 7
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 845VK
UT WOS:000223273200070
ER
PT J
AU Lee, TG
Hesse, M
Le, AT
Lin, CD
AF Lee, TG
Hesse, M
Le, AT
Lin, CD
TI Charge transfer in slow collisions of O8+ and Ar8+ ions with H(1s) below
2 keV/amu
SO PHYSICAL REVIEW A
LA English
DT Article
ID CAPTURE CROSS-SECTIONS; ELECTRON-CAPTURE; ORBITAL-EXPANSION; LOW-ENERGY;
HYDROGEN; HE
AB We calculated the charge-transfer cross sections for O8++H collisions for energies from 1 eV/amu to 2 keV/amu, using the recently developed hyperspherical close-coupling method. In particular, the discrepancy for electron capture to the n=6 states of O7+ from the previous theoretical calculations is further analyzed. Our results indicate that at low energies (below 100 eV/amu) electron capture to the n=6 manifold of O7+ becomes dominant. The present results are used to resolve the long-standing discrepancies from the different elaborate semiclassical calculations near 100 eV/amu. We have also performed the semiclassical atomic orbital close-coupling calculations with straight-line trajectories. We found the semiclassical calculations agree with the quantal approach at energy above 100 eV/amu, where the collision occurs at large impact parameters. Calculations for Ar8++H collisions in the same energy range have also been carried out to analyze the effect of the ionic core on the subshell cross sections. By using diabatic molecular basis functions, we show that converged results can be obtained with small numbers of channels.
C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
Kansas State Univ, Dept Phys, Manhattan, KS 66506 USA.
Free Univ Brussels, B-1050 Brussels, Belgium.
RP Lee, TG (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RI Lin, CD/G-4112-2010; Lee, Teck Ghee/D-5037-2012; Lin, c d/D-7312-2012
OI Lee, Teck Ghee/0000-0001-9472-3194; Lin, c d/0000-0003-4847-8938
NR 20
TC 12
Z9 12
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
EI 1094-1622
J9 PHYS REV A
JI Phys. Rev. A
PD JUL
PY 2004
VL 70
IS 1
AR 012702
DI 10.1103/PhysRevA.70.012702
PG 7
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 845VK
UT WOS:000223273200060
ER
PT J
AU Staub, F
Braud, M
Balmer, JE
Nilsen, J
Bajt, S
AF Staub, F
Braud, M
Balmer, JE
Nilsen, J
Bajt, S
TI Simultaneous near-field and far-field imaging of the 11.9-nm Ni-like Sn
soft-x-ray laser
SO PHYSICAL REVIEW A
LA English
DT Article
ID SATURATION; NM
AB We report on two-dimensional near-field imaging experiments of the 11.9-nm Sn x-ray laser that were performed with a set of Mo/Y multilayer mirrors having reflectivities of up to similar to45% at normal and at 45degrees incidence. Second-moment analysis of the x-ray laser emission was used to determine values of the x-ray beam propagation factor M-2 for a range of irradiation parameters. The results reveal a reduction of M-2 with increasing prepulse amplitude. The spatial size of the output is a factor of similar to2 smaller than previously measured for the 14.7-nm Pd x-ray laser, while the distance of the x-ray emission with respect to the target surface remains roughly the same.
C1 Univ Bern, Inst Appl Phys, CH-3012 Bern, Switzerland.
Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Staub, F (reprint author), Univ Bern, Inst Appl Phys, Sidlerstr 5, CH-3012 Bern, Switzerland.
EM felix.staub@iap.unibe.ch
RI Bajt, Sasa/G-2228-2010
NR 18
TC 2
Z9 2
U1 0
U2 1
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 1
AR 013813
DI 10.1103/PhysRevA.70.013813
PG 6
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 845VK
UT WOS:000223273200117
ER
PT J
AU Trevisan, CS
Orel, AE
Rescigno, TN
AF Trevisan, CS
Orel, AE
Rescigno, TN
TI Ab initio study of low-energy electron collisions with tetrafluoroethene
C2F4
SO PHYSICAL REVIEW A
LA English
DT Article
ID ACCURATE ABINITIO TREATMENT; EFFECTIVE CORE POTENTIALS; CROSS-SECTIONS;
HIGH-PERFORMANCE; GAS CHEMISTRIES; SCATTERING; FLUOROETHYLENES;
REDUCTION; ETHYLENE; IMPACT
AB We report the results of variational calculations of elastic electron scattering by tetrafluoroethene (C2F4) with incident electron energies ranging from 0.5 to 20 eV, using the complex Kohn method and effective core potentials. These are the first fully ab initio calculations to reproduce experimental angular differential cross sections at energies below 10 eV. Low-energy electron scattering by C2F4 is sensitive to the inclusion of electronic correlation and target-distortion effects. We therefore present results that describe the dynamic polarization of the target by the incident electron. The calculated cross sections are compared with recent experimental measurements.
C1 Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Trevisan, CS (reprint author), Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA.
NR 28
TC 3
Z9 3
U1 0
U2 1
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 1
AR 012704
DI 10.1103/PhysRevA.70.012704
PG 10
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 845VK
UT WOS:000223273200062
ER
PT J
AU Bahrs, S
Goni, AR
Thomsen, C
Maiorov, B
Nieva, G
Fainstein, A
AF Bahrs, S
Goni, AR
Thomsen, C
Maiorov, B
Nieva, G
Fainstein, A
TI Light-induced oxygen-ordering dynamics in (Y,Pr)Ba2Cu3O6.7: A Raman
spectroscopy and Monte Carlo study
SO PHYSICAL REVIEW B
LA English
DT Article
ID SINGLE-CRYSTALS; DEFICIENT YBA2CU3OX; ROOM-TEMPERATURE; PERSISTENT
PHOTOCONDUCTIVITY; FILMS; TRANSITION; SUPERCONDUCTIVITY; SCATTERING;
RELAXATION; DISORDER
AB We investigated the time and temperature dependence of photobleaching effects in RBa2Cu3O7-delta single crystals (R=Y,Pr) by Raman spectroscopy and Monte Carlo simulations based on the asymmetric next-nearest-neighbor Ising model. In a temperature range between 40 and 300 K the bleaching slows down on cooling, displaying a pronounced change in dynamics around 160 K for R=Y. To model this behavior we extended the Ising model by introducing a single energy barrier which impedes oxygen movement in the plane unless the oxygen atoms are excited by light. We obtain a time- and temperature-dependent development of superstructures under illumination with the fastest change at intermediate model temperatures. The chain-fragment development in the simulation thus matches the experimental low-temperature dynamics of Raman photobleaching, providing further support for oxygen reordering in the chain plane being at the origin of Raman photobleaching and related effects.
C1 Tech Univ Berlin, Inst Festkorperphys, D-10623 Berlin, Germany.
Los Alamos Natl Lab, Supercond Technol Ctr, Los Alamos, NM 87545 USA.
Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina.
Inst Ciencia Mat Barcelona, Bellaterra 08193, Spain.
RP Bahrs, S (reprint author), Tech Univ Berlin, Inst Festkorperphys, Hardenbergstr 36, D-10623 Berlin, Germany.
RI Thomsen, Christian/E-2295-2012; Goni, Alejandro/M-2239-2014; Thomsen,
Christian/B-5014-2015;
OI Goni, Alejandro/0000-0002-1193-3063; Thomsen,
Christian/0000-0001-6057-1401; Maiorov, Boris/0000-0003-1885-0436
NR 38
TC 10
Z9 10
U1 2
U2 3
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 1
AR 014512
DI 10.1103/PhysRevB.70.014512
PG 9
WC Physics, Condensed Matter
SC Physics
GA 842IE
UT WOS:000222996300096
ER
PT J
AU Bussmann-Holder, A
Bishop, AR
AF Bussmann-Holder, A
Bishop, AR
TI Quantum paraelectricity versus ferroelectricity: Nonlinear
polarizability model
SO PHYSICAL REVIEW B
LA English
DT Article
ID STRUCTURAL PHASE-TRANSITIONS; LATTICE-DYNAMICS; CUBIC PHASE; BATIO3;
SRTIO3; KTA1-XNBXO3; LIXK1-XTAO3; PEROVSKITES; TITANATE; ORIGIN
AB The suppression of ferroelectricity by quantum fluctuations is investigated within a nonlinear polarizability model. A mass dependence of the quantum fluctuation dominated state is discovered which can extend to rather high temperatures as compared to known quantum paraelectrics. In addition a crossover from order-disorder to displacive dynamics is observed when ferroelectricity is suppressed. A phase appears in a regime where deviations from the high-temperature behavior set in, where polar precursors coexist with paraelectric quantum fluctuations. Elastic stiffness is found to crucially contribute to mode-mode coupling and the stability of the system.
C1 Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany.
Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Bussmann-Holder, A (reprint author), Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany.
NR 26
TC 9
Z9 9
U1 0
U2 2
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 2
AR 024104
DI 10.1103/PhysRevB.70.024104
PG 5
WC Physics, Condensed Matter
SC Physics
GA 842IH
UT WOS:000222996600017
ER
PT J
AU Carrier, P
Wei, SH
AF Carrier, P
Wei, SH
TI Calculated spin-orbit splitting of all diamondlike and zinc-blende
semiconductors: Effects of p1(/2) local orbitals and chemical trends
SO PHYSICAL REVIEW B
LA English
DT Article
ID RELATIVISTIC BAND-STRUCTURE; II-VI SEMICONDUCTORS; VAPOR-PHASE EPITAXY;
OPTICAL-PROPERTIES; WAVE METHOD; ALLOYS; PHOTOEMISSION; HALIDES;
DEPENDENCE; EFFICIENCY
AB We have calculated the spin-orbit (SO) splitting Delta(SO)=epsilon(Gamma(8v))-epsilon(Gamma(7v)) for all diamondlike group IV and zinc-blende group III-V, II-VI, and I-VII semiconductors using the full potential linearized augmented plane wave method within the local density approximation. The SO coupling is included using the second-variation procedure, including the p(1/2) local orbitals. The calculated SO splittings are in very good agreement with available experimental data. The corrections due to the inclusion of the p(1/2) local orbital are negligible for lighter atoms, but can be as large as similar to250 meV for 6p anions. We find that (i) the SO splittings increase monotonically when anion atomic number increases; (ii) the SO splittings increase with the cation atomic number when the compound is more covalent such as in most III-V compounds; (iii) the SO splittings decrease with the cation atomic number when the compound is more ionic, such as in II-VI and the III-nitride compounds; (iv) the common-anion rule, which states that the variation of Delta(SO) is small for common-anion systems, is usually obeyed, especially for ionic systems, but can break down if the compounds contain second-row elements such as BSb; (v) for IB-VII compounds, the Delta(SO) is small and in many cases negative and it does not follow the rules discussed above. These trends are explained in terms of atomic SO splitting, volume deformation-induced charge renormalization, and cation-anion p-d couplings.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Natl Renewable Energy Lab, Golden, CO 80401 USA.
NR 55
TC 83
Z9 83
U1 1
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD JUL
PY 2004
VL 70
IS 3
AR 035212
DI 10.1103/PhysRevB.70.035212
PG 9
WC Physics, Condensed Matter
SC Physics
GA 842II
UT WOS:000222996700059
ER
PT J
AU Cucchietti, FM
Pastawski, HM
Jalabert, RA
AF Cucchietti, FM
Pastawski, HM
Jalabert, RA
TI Universality of the Lyapunov regime for the Loschmidt echo
SO PHYSICAL REVIEW B
LA English
DT Article
ID LANDAUER-BUTTIKER EQUATIONS; CLASSICALLY CHAOTIC SYSTEMS;
NUCLEAR-MAGNETIC-RESONANCE; POLARIZATION ECHOES; HAMILTONIAN-SYSTEMS;
QUANTUM TRANSPORT; PERIODIC-ORBITS; DECOHERENCE; TIME; STABILITY
AB The Loschmidt echo (LE) is a magnitude that measures the sensitivity of quantum dynamics to perturbations in the Hamiltonian. For a certain regime of the parameters, the LE decays exponentially with a rate given by the Lyapunov exponent of the underlying classically chaotic system. We develop a semiclassical theory, supported by numerical results in a Lorentz gas model, which allows us to establish and characterize the universality of this Lyapunov regime. In particular, the universality is evidenced by the semiclassical limit of the de Broglie wavelength going to zero, the behavior for times longer than Ehrenfest time, the insensitivity with respect to the form of the perturbation, and the behavior of individual (nonaveraged) initial conditions. Finally, by elaborating a semiclassical approximation to the Wigner function, we are able to distinguish between classical and quantum origin for the different terms of the LE. This approach renders an understanding for the persistence of the Lyapunov regime after the Ehrenfest time, as well as a reinterpretation of our results in terms of the quantum-classical transition.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
Univ Nacl Cordoba, Fac Matemat Astron & Fis, RA-5000 Cordoba, Argentina.
Inst Phys & Chim Mat Strasbourg, CNRS, UMR 7504, ULP, F-67034 Strasbourg 2, France.
RP Los Alamos Natl Lab, Div Theoret, MS B213, Los Alamos, NM 87545 USA.
RI Jalabert, Rodolfo/E-7271-2011; Cucchietti, Fernando/C-7765-2016
OI Cucchietti, Fernando/0000-0002-9027-1263
NR 85
TC 34
Z9 34
U1 0
U2 2
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 JUL
PY 2004
VL 70
IS 3
AR 035311
DI 10.1103/PhysRevB.70.035311
PG 23
WC Physics, Condensed Matter
SC Physics
GA 842II
UT WOS:000222996700074
ER
PT J
AU Dabrowski, B
Chmaissem, O
Klamut, PW
Kolesnik, S
Maxwell, M
Mais, J
Ito, Y
Armstrong, BD
Jorgensen, JD
Short, S
AF Dabrowski, B
Chmaissem, O
Klamut, PW
Kolesnik, S
Maxwell, M
Mais, J
Ito, Y
Armstrong, BD
Jorgensen, JD
Short, S
TI Reduced ferromagnetic transition temperatures in SrRu1-vO3 perovskites
from Ru-site vacancies
SO PHYSICAL REVIEW B
LA English
DT Article
ID TRANSPORT-PROPERTIES; THIN-FILMS; SRRUO3; SR1-XCAXRUO3
AB We show that annealing of stoichiometric SrRuO3 perovskites in high-pressure oxygen of 600 atm near 1100 degreesC produces SrRu1-vO3 compounds with vacancies on the Ru-sites. The creation of Ru vacancies rapidly suppresses the ferromagnetic ordering temperature, T-C, from 163 K to 45 K with an increase of vapproximate to0.09. Subtle structural changes that accompany the creation of Ru-site vacancies are different from the typical properties of transition metal perovskites, for which an increased formal oxidation state of the B-site cations normally leads to decreased B-O interatomic distances and contraction of the unit cell volume. The reduced charge screening caused by the Ru-vacancies offsets an expected decrease of the average interatomic distance Ru-O and rotation of the RuO6 octahedra as Sr atoms relax toward Ru-vacancies increases the observed volume.
C1 No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Dabrowski, B (reprint author), No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
NR 19
TC 61
Z9 62
U1 0
U2 15
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 1
AR 014423
DI 10.1103/PhysRevB.70.014423
PG 7
WC Physics, Condensed Matter
SC Physics
GA 842IE
UT WOS:000222996300070
ER
PT J
AU Di Castro, D
Angst, M
Eshchenko, DG
Khasanov, R
Roos, J
Savic, IM
Shengelaya, A
Bud'ko, SL
Canfield, PC
Conder, K
Karpinski, J
Kazakov, SM
Ribeiro, RA
Keller, H
AF Di Castro, D
Angst, M
Eshchenko, DG
Khasanov, R
Roos, J
Savic, IM
Shengelaya, A
Bud'ko, SL
Canfield, PC
Conder, K
Karpinski, J
Kazakov, SM
Ribeiro, RA
Keller, H
TI Absence of a boron isotope effect in the magnetic penetration depth of
MgB2
SO PHYSICAL REVIEW B
LA English
DT Article
ID MUON-SPIN-ROTATION; T-C; SUPERCONDUCTORS; TEMPERATURE; ORIGIN;
LA2-XSRXCUO4; CARRIERS
AB The magnetic penetration depth lambda(0) in polycrystalline MgB2 for different boron isotopes (B-10/B-11) was investigated by transverse field muon spin rotation. No boron isotope effect on the penetration depth lambda(0) was found within experimental error: Deltalambda(0)/lambda(0)=0.8(8)%, suggesting that MgB2 is an adiabaic superconductor. This is in contrast to the substantial oxygen isotope effect on lambda(0) observed in cuprate high-temperature superconductors.
C1 Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland.
Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
Univ Belgrade, Fac Phys, YU-11001 Belgrade, Serbia Monteneg.
Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
Paul Scherrer Inst, Swiss Muon Source, CH-5232 Villigen, Switzerland.
ETH, Neutron Scattering Lab, CH-5232 Villigen, Switzerland.
ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland.
RP Di Castro, D (reprint author), Univ Zurich, Inst Phys, Schonberggasse 9, CH-8057 Zurich, Switzerland.
EM dicastro@physik.unizh.ch
RI Ribeiro, Raquel/B-9041-2012; Angst, Manuel/I-4380-2012; Kazakov,
Sergey/A-4139-2014; Canfield, Paul/H-2698-2014;
OI Ribeiro, Raquel/0000-0001-6075-1701; Angst, Manuel/0000-0001-8892-7019;
Kazakov, Sergey/0000-0002-0553-7881; DI CASTRO,
DANIELE/0000-0002-0878-6904; Khasanov, Rustem/0000-0002-4768-5524
NR 41
TC 16
Z9 16
U1 0
U2 4
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 1
AR 014519
DI 10.1103/PhysRevB.70.014519
PG 5
WC Physics, Condensed Matter
SC Physics
GA 842IE
UT WOS:000222996300103
ER
PT J
AU Fishman, RS
AF Fishman, RS
TI Spin dynamics of double-exchange manganites with magnetic frustration
SO PHYSICAL REVIEW B
LA English
DT Article
ID METAL-INSULATOR-TRANSITION; GENERALIZED VILLAIN MODEL; PHASE-SEPARATION;
WAVE THEORY; FIELD; PR0.7CA0.3MNO3
AB This work examines the effects of magnetic frustration due to competing ferromagnetic and antiferromagnetic Heisenberg interactions on the spin dynamics of the double-exchange model. When the local moments are noncolinear, a charge-density wave forms because the electrons prefer to sit on lines of sites that are coupled ferromagnetically. With increasing hopping energy, the local spins become aligned and the average spin-wave stiffness increases. Phase separation is found only within a narrow range of hopping energies. Results of this work are applied to the field-induced jump in the spin-wave stiffness observed in the manganite Pr1-xCaxMnO3 with 0.3less than or equal toxless than or equal to0.4.
C1 Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA.
RP Fishman, RS (reprint author), Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA.
RI Fishman, Randy/C-8639-2013
NR 27
TC 4
Z9 4
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD JUL
PY 2004
VL 70
IS 1
AR 012403
DI 10.1103/PhysRevB.70.012403
PG 4
WC Physics, Condensed Matter
SC Physics
GA 842IE
UT WOS:000222996300009
ER
PT J
AU Freeland, JW
Kodama, RH
Vedpathak, M
Erwin, SC
Keavney, DJ
Winarski, R
Ryan, P
Rosenberg, RA
AF Freeland, JW
Kodama, RH
Vedpathak, M
Erwin, SC
Keavney, DJ
Winarski, R
Ryan, P
Rosenberg, RA
TI Induced Ge spin polarization at the Fe/Ge interface
SO PHYSICAL REVIEW B
LA English
DT Article
ID MAGNETIC CIRCULAR-DICHROISM; SUM-RULES; FE; FILMS; SI; INJECTION;
DENSITY; STATES; METALS; LAYERS
AB We report direct experimental evidence showing induced magnetic moments on Ge at the interface in an Fe/Ge system. Details of the x-ray magnetic circular dichroism and resonant magnetic scattering at the Ge L edge demonstrate the presence of spin-polarized s states at the Fermi level, as well as d-character moments at higher energy, which are both oriented antiparallel to the moment of the Fe layer. Use of the sum rules enables extraction of the L/S ratio, which is zero for the s part and similar to0.5 for the d component. These results are consistent with layer-resolved electronic structure calculations, which estimate that the s and d components of the Ge moment are antiparallel to the Fe 3d moment and have a magnitude of similar to0.01 mu(B).
C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
Univ Illinois, Dept Phys, Chicago, IL 60607 USA.
USN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
RP Freeland, JW (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RI Erwin, Steven/B-1850-2009; Rosenberg, Richard/K-3442-2012
NR 24
TC 13
Z9 13
U1 0
U2 0
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 3
AR 033201
DI 10.1103/PhysRevB.70.033201
PG 4
WC Physics, Condensed Matter
SC Physics
GA 842II
UT WOS:000222996700007
ER
PT J
AU Frenkel, AI
Pease, DM
Giniewicz, J
Stern, EA
Brewe, DL
Daniel, M
Budnick, J
AF Frenkel, AI
Pease, DM
Giniewicz, J
Stern, EA
Brewe, DL
Daniel, M
Budnick, J
TI Concentration-dependent short-range order in the relaxor ferroelectric
(1-x)Pb(Sc,Ta)O-3-xPbTiO(3)
SO PHYSICAL REVIEW B
LA English
DT Article
ID PHASE-TRANSITION; LOCAL-STRUCTURE; FINE-STRUCTURE; HIGH-PRESSURE;
PEROVSKITE; CERAMICS; PB(SC1/2TA1/2)O3; SCATTERING; CRYSTALS; PBTIO3
AB Using the x-ray diffraction and x-ray absorption fine structure techniques, we have probed Ti, Ta, and Sc local environments in the solid solution system (1-x)Pb(Sc,Ta)O-3-xPbTiO(3). This system is known to display a variety of ferroelectric behaviors ranging from variable order-disorder, to relaxor, to a mixed phase region, and then finally to normal ferroelectric, as the value of x is increased. We find, in agreement with neutron diffraction studies, no detectable displacements of Ta or Sc atoms from their oxygen cage centers in any of these systems. Surprisingly, we find that the Ti atom is displaced along (111) from its inversion symmetry center for x=0.05. However, this average local Ti displacement gradually changes from (111) to (001) as x increases, whereas the global crystal structure abruptly changes from rhombohedral to tetragonal at x=0.45. Our experimental results and theoretical modeling of others together suggest that this system consists of mixed regions, some characterized by a (111) Ti displacement and others characterized by a (001) Ti displacement. The displacement averaged over all regions becomes more weighted toward (001) as x increases. Another significant result is that all our samples (with x ranging from 0 to 0.5) have a high degree of local ordering of the B sites with alternate occupation of Ta and Sc atoms.
C1 Yeshiva Univ, Dept Phys, New York, NY 10016 USA.
Univ Connecticut, Dept Phys, Storrs, CT 06269 USA.
Indiana Univ Penn, Dept Phys, Indiana, PA 15705 USA.
Univ Washington, Dept Phys, Seattle, WA 98195 USA.
Argonne Natl Lab, PNC CAT, Argonne, IL 60439 USA.
RP Frenkel, AI (reprint author), Yeshiva Univ, Dept Phys, New York, NY 10016 USA.
EM frenkel@bnl.gov
RI Frenkel, Anatoly/D-3311-2011
OI Frenkel, Anatoly/0000-0002-5451-1207
NR 46
TC 32
Z9 32
U1 1
U2 5
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 JUL
PY 2004
VL 70
IS 1
AR 014106
DI 10.1103/PhysRevB.70.014106
PG 12
WC Physics, Condensed Matter
SC Physics
GA 842IE
UT WOS:000222996300033
ER
PT J
AU Galperin, YM
Kozub, VI
Vinokur, VM
AF Galperin, YM
Kozub, VI
Vinokur, VM
TI Low-frequency noise in tunneling through a single spin
SO PHYSICAL REVIEW B
LA English
DT Article
ID INDIVIDUAL PARAMAGNETIC SPINS; MICROSCOPY; RESONANCE
AB We propose measurements of low-frequency noise in the tunneling current through a single molecule with a spin as an experimental probe for identifying a mechanism of the spin-dependent tunneling. A specific tail near the zero frequency in the noise spectrum is predicted; the amplitude and the width being of the same order of magnitude as the recently reported peak in the noise spectrum at the spin Larmor frequency. The ratio of the spectrum amplitudes at zero- and Larmor frequencies is shown to be a convenient tool for testing theoretical predictions.
C1 Univ Oslo, Dept Phys, N-0316 Oslo, Norway.
Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia.
Argonne Natl Lab, Argonne, IL 60439 USA.
RP Galperin, YM (reprint author), Univ Oslo, Dept Phys, POB 1048 Blindern, N-0316 Oslo, Norway.
RI Galperin, Yuri/A-1851-2008; Kozub, Veniamin/E-4017-2014
OI Galperin, Yuri/0000-0001-7281-9902;
NR 24
TC 7
Z9 7
U1 0
U2 1
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 3
AR 033405
DI 10.1103/PhysRevB.70.033405
PG 4
WC Physics, Condensed Matter
SC Physics
GA 842II
UT WOS:000222996700027
ER
PT J
AU Gedik, N
Blake, P
Spitzer, RC
Orenstein, J
Liang, RX
Bonn, DA
Hardy, WN
AF Gedik, N
Blake, P
Spitzer, RC
Orenstein, J
Liang, RX
Bonn, DA
Hardy, WN
TI Single-quasiparticle stability and quasiparticle-pair decay in
YBa2Cu3O6.5
SO PHYSICAL REVIEW B
LA English
DT Article
ID THERMAL-CONDUCTIVITY; RELAXATION DYNAMICS; SUPERCONDUCTING STATE;
YBA2CU3O7-DELTA; LIFETIMES; QUASIPARTICLE; SCATTERING; TIME
AB We report results and analysis of time-resolved photoinduced reflectivity experiments on the cuprate superconductor YBa2Cu3O6.5. The sample, which has T-c=45 K, was characterized by a high degree of purity and Ortho II ordering. The change in reflectivity DeltaR was induced and probed using pulses of 100 femtosecond duration and photon energy 1.55 eV from a Ti:Sapphire laser. We provide a detailed picture of the decay rate gamma of DeltaR as a function of temperature T and pump intensity I. At low T, gamma decreases linearly with decreasing I, extrapolating to nearly zero in the limit that I tends to zero. At higher temperature gamma has the same linear dependence, but with nonzero limit as I-->0. In the interpretation of these results we assume that DeltaR is proportional to the nonequilibrium quasiparticle density created by the laser. From an analysis of the gamma vs I we estimate beta, the coefficient of proportionality relating the quasiparticle decay rate to the density. The intercept of gamma vs I yields the thermal equilibrium quasiparticle decay rate. In a discussion section, we argue that the quasiparticles induced by the laser occupy primarily states near the antinodal regions of the Brillouin zone. We explain the divergence of the lifetime of these particles as T and I both tend to zero as a consequence of momentum and energy conservation in electron-electron scattering. Next, we discuss the significance of the measured value of beta, which is approximate to0.1 cm(2) s(-1) . We point out that the natural unit for beta in a two-dimensional superconductor is h/m(*), and define a dimensionless constant C such that betaequivalent toCh/m(*). If the decay process is one in which quasiparticles return to the condensate with emission of a phonon, then C is a measure of the electron-phonon interaction. Alternatively, expressing the marginal Fermi liquid scattering in the normal state in terms of an effective beta implies C=1/pi, which is in excellent agreement with the experimentally determined value in the superconducting state.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada.
RP Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM gedik@socrates.berkeley.edu
RI Blake, Peter/E-8556-2010; Orenstein, Joseph/I-3451-2015
NR 41
TC 67
Z9 67
U1 2
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 JUL
PY 2004
VL 70
IS 1
AR 014504
DI 10.1103/PhysRevB.70.014504
PG 13
WC Physics, Condensed Matter
SC Physics
GA 842IE
UT WOS:000222996300088
ER
PT J
AU Gehring, PM
Ohwada, K
Shirane, G
AF Gehring, PM
Ohwada, K
Shirane, G
TI Electric-field effects on the diffuse scattering in PbZn1/3Nb2/3O3 doped
with 8% PbTiO3
SO PHYSICAL REVIEW B
LA English
DT Article
ID INELASTIC NEUTRON-SCATTERING; GLASSY POLARIZATION BEHAVIOR; RANGE ORDER;
FERROELECTRICS; PEROVSKITES
AB We report measurements of the neutron diffuse scattering from a single crystal of the relaxor ferroelectric PbZn1/3Nb2/3O3 doped with 8% PbTiO3 (PZN-8%PT) for temperatures 100 Kless than or equal toTless than or equal to530 K and electric fields 0 kV/cmless than or equal toEless than or equal to10 kV/cm. The field-cooled diffuse scattering measured transverse to the (003) Bragg peak is strongly suppressed in the tetragonal phase at 400 K for E=2 kV/cm applied along the [001] direction. However, no change is observed in the diffuse scattering measured transverse to (300), even for field strengths up to 10 kV/cm. Thus the application of an external electric field in the tetragonal (ferroelectric) phase of PZN-8%PT does not produce a uniformly polarized state. This unusal behavior can be understood within the context of the model of Hirota of phase-shifted polar nanoregions in relaxors, since an electric field applied along [001] below T-c would reduce the shifts of the nanoregions along [001] while preserving those along the orthogonal [100] direction.
C1 Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Gehring, PM (reprint author), Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
OI Gehring, Peter/0000-0002-9236-2046
NR 23
TC 28
Z9 28
U1 0
U2 2
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 1
AR 014110
DI 10.1103/PhysRevB.70.014110
PG 6
WC Physics, Condensed Matter
SC Physics
GA 842IE
UT WOS:000222996300037
ER
PT J
AU Hundley, MF
Malinowski, A
Pagliuso, PG
Sarrao, JL
Thompson, JD
AF Hundley, MF
Malinowski, A
Pagliuso, PG
Sarrao, JL
Thompson, JD
TI Anomalous f-electron Hall effect in the heavy-fermion system CeTIn5
(T=Co, Ir, or Rh)
SO PHYSICAL REVIEW B
LA English
DT Article
ID HIGH MAGNETIC-FIELDS; UNCONVENTIONAL SUPERCONDUCTIVITY;
TRANSPORT-PROPERTIES; YB COMPOUNDS; MAGNETORESISTANCE; CECOIN5;
COEFFICIENT; RESISTIVITY; STATES; CECU6
AB The in-plane Hall coefficient R-H(T) of CeRhIn5, CeIrIn5, and CeCoIn5, and their respective nonmagnetic lanthanum analogs are reported in fields up to 90 kOe and at temperatures from 2-325 K. R-H(T) is negative, field independent, and dominated by skew scattering above similar to50 K in the Ce compounds. R-H(H-->0) becomes increasingly negative below 50 K and varies with temperature in a manner that is inconsistent with skew scattering. Field-dependent measurements show that the low-T anomaly is strongly suppressed when the applied field is increased to 90 kOe. Measurements on LaRhIn5, LaIrIn5, and LaCoIn5 indicate that the same anomalous temperature dependence is present in the Hall coefficient of these nonmagnetic analogs, albeit with a reduced amplitude and no field dependence. Hall angle (theta(H)) measurements find that the ratio rho(xx)/rho(xy)=cot(theta(H)) varies as T-2 below 20 K for all three Ce-115 compounds. The Hall angles of the La-115 compounds follow this T dependence as well. These data suggest that the electronic-structure contribution dominates the Hall effect in the 115 compounds, with f electron and Kondo interactions acting to magnify the influence of the underlying complex band structure. This is in stark contrast to the situation in most 4f and 5f heavy-fermion compounds where the normal carrier contribution to the Hall effect provides only a small, T-independent background to R-H.
C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
RP Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
RI Malinowski, Artur/A-2184-2015; Pagliuso, Pascoal/C-9169-2012
OI Malinowski, Artur/0000-0003-3771-9353;
NR 63
TC 33
Z9 34
U1 3
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 JUL
PY 2004
VL 70
IS 3
AR 035113
DI 10.1103/PhysRevB.70.035113
PG 9
WC Physics, Condensed Matter
SC Physics
GA 842II
UT WOS:000222996700043
ER
PT J
AU Knickelbein, MB
AF Knickelbein, MB
TI Magnetic ordering in manganese clusters
SO PHYSICAL REVIEW B
LA English
DT Article
ID SEEDED SUPERSONIC BEAMS; ELECTRON-SPIN-RESONANCE; RARE-EARTH CLUSTERS;
NICKEL CLUSTERS; FERROMAGNETIC CLUSTERS; IONIZATION-POTENTIALS;
GADOLINIUM CLUSTERS; MOLECULAR-BEAM; IRON CLUSTERS; FREE COBALT
AB Isolated manganese clusters, Mn-n, (n=5-22) are deflected by a linear-gradient magnetic field. Mn-7-Mn-22 are found to deflect uniformly toward high field. The magnitude of the deflections indicate susceptibilities far in excess of those expected based on the susceptibility of bulk manganese, demonstrating that Mn clusters in this size range are magnetically ordered. Per-atom moments obtained from Curie's Law analysis range from 0.4mu(b) (Mn-19) to 1.7 mu(b) (Mn-12). For Mn-5 and Mn-6, symmetric broadening of the cluster beam is observed, and their moments were determined via line-shape analysis using both free-spin and adiabatic rotor models. The measured moments, interpreted in light of recent density functional theory calculations, suggest that Mn clusters in this size range are molecular ferrimagnets.
C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
RP Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 54
TC 111
Z9 112
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD JUL
PY 2004
VL 70
IS 1
AR 014424
DI 10.1103/PhysRevB.70.014424
PG 8
WC Physics, Condensed Matter
SC Physics
GA 842IE
UT WOS:000222996300071
ER
PT J
AU Krishnamurthy, VV
Zoto, I
Mankey, GJ
Robertson, JL
Maat, S
Fullerton, EE
Nwagwu, I
Akujieze, JK
AF Krishnamurthy, VV
Zoto, I
Mankey, GJ
Robertson, JL
Maat, S
Fullerton, EE
Nwagwu, I
Akujieze, JK
TI Antiferromagnetic phase transitions in an ordered Pt3Fe(111) film
studied by neutron diffraction
SO PHYSICAL REVIEW B
LA English
DT Article
ID CRITICAL EXPONENTS; MAGNETIC ORDER; ALLOYS
AB Neutron diffraction has been used to investigate the critical behavior at the onset of antiferromagnetic phase transitions in a (111) oriented Pt73Fe27 film grown on an a-axis oriented sapphire (alpha-Al2O3) substrate. As in the bulk, there is an antiferromagnetic reorientation transition from the Q(1)=2pi/a(1/2,1/2,0) phase to the Q(2)=2pi/a(1/2,0,0) phase upon cooling. The temperature dependence of the integrated intensity of the (1/2,1/2,0) and the (1/2,0,0) antiferromagnetic Bragg peaks yielded the Neeel temperature of 160.25+/-0.2 K and a reorientation transition temperature of 95+/-0.2 K. The magnetization critical exponent beta is found to be 0.368+/-0.013 for the Q(1) phase and 0.37+/-0.02 for the Q(2) phase. These critical exponents are in excellent agreement with the predictions of the 3d Heisenberg universality class. A comparison of the transition temperatures and the exponents in the film and in single crystal at the same alloy composition is presented.
C1 Univ Alabama, Ctr Mat Informat Technol, Tuscaloosa, AL 35487 USA.
Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA.
Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA.
San Jose Res Ctr, Hitachi Global Storage Technol, San Jose, CA 95120 USA.
Chicago State Univ, Dept Chem & Phys, Chicago, IL 60628 USA.
RP Krishnamurthy, VV (reprint author), Univ Alabama, Ctr Mat Informat Technol, Tuscaloosa, AL 35487 USA.
RI Fullerton, Eric/H-8445-2013; Mankey, Gary/G-9110-2011
OI Fullerton, Eric/0000-0002-4725-9509; Mankey, Gary/0000-0003-3163-5159
NR 19
TC 8
Z9 8
U1 2
U2 4
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 2
AR 024424
DI 10.1103/PhysRevB.70.024424
PG 5
WC Physics, Condensed Matter
SC Physics
GA 842IH
UT WOS:000222996600057
ER
PT J
AU Lu, WC
Wang, CZ
Chan, TL
Ruedenberg, K
Ho, KM
AF Lu, WC
Wang, CZ
Chan, TL
Ruedenberg, K
Ho, KM
TI Representation of electronic structures in crystals in terms of highly
localized quasiatomic minimal basis orbitals
SO PHYSICAL REVIEW B
LA English
DT Article
ID WANNIER FUNCTIONS; ENERGY-BANDS; SYSTEM-SIZE; POLARIZATION
AB A method is presented for expressing electronic orbital states of a periodic solid in terms of a minimal basis set of localized quasiatomic orbitals. While spanning exactly the same occupied subspace as the orbitals determined by a fully converged first-principles calculation with a large basis set, the minimal-basis orbitals from this work are highly localized on atoms and exhibit shapes close to orbitals of the isolated atom. They are also shown to be useful for analyzing chemical bonding in periodic systems. All of these features are found for insulating as well as metallic solids.
C1 US DOE, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ, Dept Phys, Ames, IA 50011 USA.
Iowa State Univ, Dept Chem, Ames, IA 50011 USA.
RP US DOE, Ames Lab, Ames, IA 50011 USA.
EM wangcz@ameslab.gov
NR 22
TC 46
Z9 46
U1 1
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD JUL
PY 2004
VL 70
IS 4
AR 041101
DI 10.1103/PhysRevB.70.041101
PG 4
WC Physics, Condensed Matter
SC Physics
GA 843CO
UT WOS:000223053300001
ER
PT J
AU Luo, X
Zhang, SB
Wei, SH
AF Luo, X
Zhang, SB
Wei, SH
TI Theory of Mn supersaturation in Si and Ge
SO PHYSICAL REVIEW B
LA English
DT Article
ID III-V SEMICONDUCTORS; GAAS
AB Using first-principles total-energy methods, we calculate the formation energy for typical Mn defects in bulk Si and Ge and on (001) surfaces, from which the various Mn solubility limits are derived. Applying the theory for ultrahigh doping in semiconductors, we can understand why Mn solubility in epitaxially-grown Si and Ge films could be several atomic percent while the solid solubility limits are many orders of magnitude smaller. In particular, we suggest that hydrogen passivation of the surface during growth could be the key to such high solubilities.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Luo, X (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM xluo3@uiuc.edu
RI Schaff, William/B-5839-2009; Krausnick, Jennifer/D-6291-2013; Zhang,
Shengbai/D-4885-2013
OI Zhang, Shengbai/0000-0003-0833-5860
NR 12
TC 31
Z9 31
U1 1
U2 9
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 3
AR 033308
DI 10.1103/PhysRevB.70.033308
PG 3
WC Physics, Condensed Matter
SC Physics
GA 842II
UT WOS:000222996700019
ER
PT J
AU Melikidze, A
Dobrovitski, VV
De Raedt, HA
Katsnelson, MI
Harmon, BN
AF Melikidze, A
Dobrovitski, VV
De Raedt, HA
Katsnelson, MI
Harmon, BN
TI Parity effects in spin decoherence
SO PHYSICAL REVIEW B
LA English
DT Article
ID QUANTUM COMPUTATION; NUCLEAR SPINS; INTERFERENCE; SUPPRESSION;
PARTICLES; DYNAMICS; CODES
AB We demonstrate that decoherence of many-spin systems can drastically differ from decoherence of single-spin systems. The difference originates at the most basic level, being determined by parity of the central system, i.e., by whether the system comprises even or odd number of spin-1/2 entities. Therefore, it is very likely that similar distinction between the central spin systems of even and odd parity is important in many other situations. Our consideration clarifies the physical origin of the unusual two-step decoherence found previously in the two-spin systems.
C1 Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA.
Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
Univ Groningen, Ctr Mat Sci, NL-9747 AG Groningen, Netherlands.
Uppsala Univ, Dept Phys, SE-75121 Uppsala, Sweden.
RP Melikidze, A (reprint author), Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA.
RI Katsnelson, Mikhail/D-4359-2012;
OI De Raedt, Hans/0000-0001-8461-4015
NR 23
TC 51
Z9 53
U1 0
U2 1
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 1
AR 014435
DI 10.1103/PhysRevB.70.014435
PG 5
WC Physics, Condensed Matter
SC Physics
GA 842IE
UT WOS:000222996300082
ER
PT J
AU Nguyen, HK
Joglekar, YN
Murthy, G
AF Nguyen, HK
Joglekar, YN
Murthy, G
TI Collective edge modes in fractional quantum Hall systems
SO PHYSICAL REVIEW B
LA English
DT Article
ID CHIRAL LUTTINGER LIQUID; GINZBURG-LANDAU THEORY; ELECTRON-GAS; COMPOSITE
FERMIONS; FIELD-THEORY; STATES; EXCITATIONS; DENSITY; RANGE; TRANSPORT
AB Over the past few years one of us (Murthy) in collaboration with Shankar has developed an extended Hamiltonian formalism capable of describing the ground-state and low-energy excitations in the fractional quantum Hall regime. The Hamiltonian, expressed in terms of composite fermion operators, incorporates all the nonperturbative features of the fractional Hall regime, so that conventional many-body approximations such as Hartree-Fock and time-dependent Hartree-Fock are applicable. We apply this formalism to develop a microscopic theory of the collective edge modes in fractional quantum Hall regime. We present the results for edge mode dispersions at principal filling factors nu=1/3, 1/5, and 2/5 for systems with unreconstructed edges. The primary advantage of the method is that one works in the thermodynamic limit right from the beginning, thus avoiding the finite-size effects which ultimately limit exact diagonalization studies.
C1 Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Nguyen, HK (reprint author), Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
NR 53
TC 4
Z9 4
U1 0
U2 0
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 3
AR 035324
DI 10.1103/PhysRevB.70.035324
PG 10
WC Physics, Condensed Matter
SC Physics
GA 842II
UT WOS:000222996700087
ER
PT J
AU Nicklas, M
Sidorov, VA
Borges, HA
Pagliuso, PG
Sarrao, JL
Thompson, JD
AF Nicklas, M
Sidorov, VA
Borges, HA
Pagliuso, PG
Sarrao, JL
Thompson, JD
TI Two superconducting phases in CeRh1-xIrxIn5
SO PHYSICAL REVIEW B
LA English
DT Article
ID UNCONVENTIONAL SUPERCONDUCTIVITY; PRESSURE; CECU2SI2; CEIRIN5; CERHIN5;
PHYSICS; NQR
AB Pressure studies of CeRh1-xIrxIn5 indicate two superconducting phases as a function of x, one with T(c)greater than or equal to2 K for x<0.9 and the other with T-c<1.2 K for x>0.9. The higher T-c phase, phase 1, emerges in proximity to an antiferromagnetic quantum-critical point; whereas, Cooper pairing in the lower T-c phase 2 is inferred to arise from fluctuations of a yet to be found magnetic state. The T-x-P phase diagram of CeRh1-xIrxIn5, though qualitatively similar, is distinctly different from that of CeCu2(Si1-xGex)(2).
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
Russian Acad Sci, Inst High Pressure Phys, Troitsk 142092, Russia.
Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22452970 Rio De Janeiro, Brazil.
RP Nicklas, M (reprint author), Max Planck Inst Chem Phys Solids, Nothnitzer Str 40, D-01187 Dresden, Germany.
RI Pagliuso, Pascoal/C-9169-2012; Nicklas, Michael/B-6344-2008
OI Nicklas, Michael/0000-0001-6272-2162
NR 32
TC 54
Z9 54
U1 0
U2 15
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 JUL
PY 2004
VL 70
IS 2
AR 020505
DI 10.1103/PhysRevB.70.020505
PG 4
WC Physics, Condensed Matter
SC Physics
GA 842IH
UT WOS:000222996600012
ER
PT J
AU Ravelo, R
Holian, BL
Germann, TC
Lomdahl, PS
AF Ravelo, R
Holian, BL
Germann, TC
Lomdahl, PS
TI Constant-stress Hugoniostat method for following the dynamical evolution
of shocked matter
SO PHYSICAL REVIEW B
LA English
DT Article
ID SCALE MOLECULAR-DYNAMICS; WAVE STRUCTURE; SIMULATIONS; PLASTICITY;
CRYSTALS
AB We present an alternative equilibrium molecular dynamics method-the uniaxial constant-stress Hugoniostat-for following the dynamical evolution of condensed matter subjected to shock waves. It is a natural extension of the recently developed uniaxial constant-volume Hugoniostat [ Maillet , Phys. Rev. E 63, 016121 (2001) ]. Integral feedback is employed to reach the Hugoniot (final) state of the shock process by controlling both the normal component of the stress tensor and internal energy. The finite strain rate imposed on the system is closely related to that inherent in the front of a shock wave. The method can easily identify phase transitions along the Hugoniot shock states, even those that exhibit multiple wave structures. As an example of the method, we have simulated the Hugoniot of a Lennard-Jones crystal shocked along the <110> direction. The results agree well with multi-million-atom nonequilibrium molecular-dynamics simulations.
C1 Univ Texas, Dept Phys, El Paso, TX 79968 USA.
Univ Texas, Mat Res Inst, El Paso, TX 79968 USA.
Los Alamos Natl Lab, Div Appl Phys, Los Alamos, NM 87545 USA.
Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Ravelo, R (reprint author), Univ Texas, Dept Phys, El Paso, TX 79968 USA.
NR 23
TC 52
Z9 53
U1 4
U2 28
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 1
AR 014103
DI 10.1103/PhysRevB.70.014103
PG 9
WC Physics, Condensed Matter
SC Physics
GA 842IE
UT WOS:000222996300030
ER
PT J
AU Schmalhorst, J
Kammerer, S
Sacher, M
Reiss, G
Hutten, A
Scholl, A
AF Schmalhorst, J
Kammerer, S
Sacher, M
Reiss, G
Hutten, A
Scholl, A
TI Interface structure and magnetism of magnetic tunnel junctions with a
Co2MnSi electrode
SO PHYSICAL REVIEW B
LA English
DT Article
ID CIRCULAR-DICHROISM; ROOM-TEMPERATURE; THIN-FILMS; FE; MAGNETORESISTANCE;
BARRIERS; CO
AB Magnetic tunnel junctions with a magnetically soft Heusler-alloy electrode (Co2MnSi/Al+oxidation+in situ annealing/Co7Fe3/Mn83Ir17) and a maximal tunnel magnetoresistance effect of 86% at 10 K/10 mV are investigated with respect to their structural and magnetic properties at the lower barrier interface by electron and x-ray absorption spectroscopy. A plasma-oxidation-induced Mn/Si segregation and oxide formation at the barrier interface is found, which results in a strongly increased area-resistance product of the junctions, because of an enlarged barrier thickness. For Co2MnSi thickness equal to 8 nm or larger, ferromagnetic order of Mn and Co spins at the interface is induced by annealing; simultaneously, atomic ordering at the interface is observed. The influence of the structural and magnetic interface properties on the temperature-dependent transport properties of the junctions is discussed.
C1 Univ Bielefeld, Dept Phys, Nano Device Grp, D-33501 Bielefeld, Germany.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Schmalhorst, J (reprint author), Univ Bielefeld, Dept Phys, Nano Device Grp, POB 100131, D-33501 Bielefeld, Germany.
EM jschmalh@physik.uni-belefeld.de
RI Schmalhorst, Jan/E-9951-2011; Hutten, Andreas/B-3524-2011; Reiss,
Gunter/A-3423-2010; Scholl, Andreas/K-4876-2012
OI Reiss, Gunter/0000-0002-0918-5940;
NR 32
TC 78
Z9 79
U1 0
U2 7
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 2
AR 024426
DI 10.1103/PhysRevB.70.024426
PG 7
WC Physics, Condensed Matter
SC Physics
GA 842IH
UT WOS:000222996600059
ER
PT J
AU Sham, TK
Naftel, SJ
Kim, PSG
Sammynaiken, R
Tang, YH
Coulthard, I
Moewes, A
Freeland, JW
Hu, YF
Lee, ST
AF Sham, TK
Naftel, SJ
Kim, PSG
Sammynaiken, R
Tang, YH
Coulthard, I
Moewes, A
Freeland, JW
Hu, YF
Lee, ST
TI Electronic structure and optical properties of silicon nanowires: A
study using x-ray excited optical luminescence and x-ray emission
spectroscopy
SO PHYSICAL REVIEW B
LA English
DT Article
ID ENERGY-LOSS SPECTROSCOPY; POROUS SILICON; QUANTUM CONFINEMENT; SI
NANOCRYSTALS; LASER-ABLATION; LIGHT-EMISSION; ABSORPTION; SURFACE;
STATES
AB We report a soft x-ray excited optical luminescence (XEOL) and x-ray emission spectroscopy (XES) study of silicon nanowires (SiNW) with excitations at the silicon K and L-3,L-2 edge, respectively. It is found that the XEOL of SiNW exhibits several luminescence bands at similar to460, similar to530, and similar to630 nm. These luminescence bands are broad and are sensitive to the Si 1s excitation channel (Si versus SiO2 whiteline). These chemical- and morphology-dependent luminescences are attributable to the emission from the encapsulating silicon oxide, the quantum-confined silicon crystallites of various sizes embedded in the oxide layer, and the silicon-silicon oxide interface. XES clearly shows the presence of a relatively thick oxide layer encapsulating the silicon nanowire and the densities of states tailing across the Fermi level. The implications of these findings to the electronic and optical properties of silicon nanowires are discussed.
C1 Univ Western Ontario, Dept Chem, London, ON N6A 3B7, Canada.
Univ Saskatchewan, Canadian Light Source, Saskatoon, SK, Canada.
Univ Saskatchewan, Dept Phys, Saskatoon, SK, Canada.
Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
Univ Wisconsin, Ctr Synchrotron Radiat, Canadian Synchrotron Radiat Facil, Madison, WI 53589 USA.
City Univ Hong Kong, Dept Phys & Mat, Hong Kong, Hong Kong, Peoples R China.
City Univ Hong Kong, Ctr Super Diamond & Adv Films COSDAF, Hong Kong, Hong Kong, Peoples R China.
RP Sham, TK (reprint author), Univ Western Ontario, Dept Chem, London, ON N6A 3B7, Canada.
NR 31
TC 82
Z9 83
U1 8
U2 52
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 4
AR 045313
DI 10.1103/PhysRevB.70.045313
PG 8
WC Physics, Condensed Matter
SC Physics
GA 843CO
UT WOS:000223053300039
ER
PT J
AU Son, JY
Mizokawa, T
Quilty, JW
Hirata, S
Takubo, K
Kimura, T
Tokura, Y
AF Son, JY
Mizokawa, T
Quilty, JW
Hirata, S
Takubo, K
Kimura, T
Tokura, Y
TI Electronic structure of La2-2xSr1+2xMn2O7 studied by x-ray photoemission
spectroscopy
SO PHYSICAL REVIEW B
LA English
DT Article
ID MANGANITE LASR2MN2O7; MAGNETORESISTANCE; LA1.2SR1.8MN2O7; OXIDES
AB We have studied the electronic structure of La2-2xSr1+2xMn2O7 with x=0.4 and 0.5 by means of x-ray photoemission spectroscopy (XPS). In going from x=0.4 to x=0.5, the O 1s, Mn 2p, and valence-band spectra show an energy shift of similar to0.2 eV toward the Fermi level that is consistent with the hole doping in the e(g) band. The spectral weight at the Fermi level is considerably suppressed for x=0.4 and 0.5, indicating that the e(g) electron has polaronic character as pointed out by Dessau Also, photoemission measurements have been done for the samples illuminated with laser light to probe photoinduced change of the electronic structure. While the O 1s spectrum of the x=0.4 sample is shifted by 0.1 eV to the higher binding energy side, that of x=0.5 is shifted by 0.7 eV. This would be related to the phase competition between the CE-type and A-type antiferromagnetic states and the unusual electron-lattice coupling found in x=0.5.
C1 Japan Sci & Technol Agcy, PRESTO, Saitama, Japan.
Univ Tokyo, Dept Complex Sci & Engn, Chiba 2778581, Japan.
Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan.
AIST, CERC, Tsukuba, Ibaraki 3058562, Japan.
AIST, JST, ERATO, SSP, Tsukuba, Ibaraki 3058562, Japan.
RP Son, JY (reprint author), Japan Sci & Technol Agcy, PRESTO, 4-1-8 Honcho Kawaguchi, Saitama, Japan.
RI Tokura, Yoshinori/C-7352-2009; Mizokawa, Takashi/E-3302-2015
OI Mizokawa, Takashi/0000-0002-7682-2348
NR 16
TC 6
Z9 6
U1 1
U2 6
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 1
AR 012411
DI 10.1103/PhysRevB.70.012411
PG 3
WC Physics, Condensed Matter
SC Physics
GA 842IE
UT WOS:000222996300017
ER
PT J
AU Tejeda, A
Dunham, D
de Abajo, FJG
Denlinger, JD
Rotenberg, E
Michel, EG
Soukiassian, P
AF Tejeda, A
Dunham, D
de Abajo, FJG
Denlinger, JD
Rotenberg, E
Michel, EG
Soukiassian, P
TI Photoelectron diffraction study of the Si-rich 3C-SiC(001)-(3 X 2)
structure
SO PHYSICAL REVIEW B
LA English
DT Article
ID X-RAY PHOTOELECTRON; ENERGY ELECTRON-DIFFRACTION; CARBIDE 100 SURFACES;
CORE-LEVEL-SHIFT; ATOMIC-STRUCTURE; AUGER-ELECTRON; BETA-SIC(100)
SURFACE; INTERFACE FORMATION; OPTICAL ANISOTROPY; SI(100) SURFACE
AB The structure of the Si-rich 3C-SiC(001)-(3x2) surface reconstruction is determined using soft x-ray photoelectron diffraction. Photoelectrons are detected along a full hemispherical sector for different photon energies. A comparison between the experimental data and multiple scattering calculations of the competing models favors a modified version of the two-adlayer asymmetric dimer model. An R-factor analysis has been employed to refine this model. We determine the interlayer spacings of the last six atomic layers and find a corrugation of (0.25+/-0.10) A for the atoms in the outermost dimer. Atoms in the second layer dimerize as well, forming rows of long and short dimers.
C1 Univ Autonoma Madrid, Dept Fis Mat Condensada, Madrid 28049, Spain.
Univ Autonoma Madrid, Inst Ciencia Mat Nicolas Cabrera, Madrid 28049, Spain.
Univ Paris Sud Orsay, CEA, Lab SIMA, DSM,DRECAM,SPCSI, F-91191 Gif Sur Yvette, France.
No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
Univ Basque Country, CSIC, Ctr Mixto, San Sebastian 20080, Spain.
Donostia Int Phys Ctr, San Sebastian 20080, Spain.
Ernest Orlando Lawrence Berkeley NAtl Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Tejeda, A (reprint author), Univ Autonoma Madrid, Dept Fis Mat Condensada, Madrid 28049, Spain.
RI Rotenberg, Eli/B-3700-2009; Garcia de Abajo, Javier/A-6095-2009;
CSIC-UPV/EHU, CFM/F-4867-2012; Michel, Enrique/A-1545-2008; DONOSTIA
INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Tejeda,
Antonio/C-4711-2014
OI Rotenberg, Eli/0000-0002-3979-8844; Garcia de Abajo,
Javier/0000-0002-4970-4565; Michel, Enrique/0000-0003-4207-7658; Tejeda,
Antonio/0000-0003-0125-4603
NR 64
TC 28
Z9 28
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD JUL
PY 2004
VL 70
IS 4
AR 045317
DI 10.1103/PhysRevB.70.045317
PG 11
WC Physics, Condensed Matter
SC Physics
GA 843CO
UT WOS:000223053300043
ER
PT J
AU Tyson, TA
Deleon, M
Croft, M
Harris, VG
Kao, CC
Kirkland, J
Cheong, SW
AF Tyson, TA
Deleon, M
Croft, M
Harris, VG
Kao, CC
Kirkland, J
Cheong, SW
TI Magnetic field melting of the charge-ordered state of La1/2Ca1/2MnO3: A
local structure perspective
SO PHYSICAL REVIEW B
LA English
DT Article
ID METAL-INSULATOR TRANSITIONS; ABSORPTION FINE-STRUCTURE; DEPENDENT
SPECIFIC-HEAT; X-RAY; COLOSSAL MAGNETORESISTANCE; PHASE-SEPARATION;
CUMULANT ANALYSIS; MANGANITES; LA0.5CA0.5MNO3; LA1-XCAXMNO3
AB The local structure about the Mn site in the half-doped system La1/2Ca1/2MnO3 was measured in magnetic fields up 10 T to probe the melting of the charge-ordered state. Examination of the Mn-O and Mn-Mn correlations reveals three distinct regions in the structure-field diagram. A broad region with weak field dependence (mainly antiferromagnetic phase below 7.5 T), a narrow-mixed phase region near similar to8.5 T and a high-field ferromagnetic phase region with strong field-structure coupling are found. At high field the Mn-O radial distribution becomes Gaussian and the Mn-Mn correlations are enhanced-consistent with the dominance of a ferromagnetic phase. Comparison of the structural measurements with transport and magnetization measurements suggests that the exponential changes in resistivity in the first region are dominated by the reordering of the moments on the Mn sites from CE type antiferromagnetic to ferromagnetic order with only a weak change in the local distortions of the MnO6 octahedra.
C1 New Jersey Inst Technol, Dept Phys, Newark, NJ 07102 USA.
Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
USN, Res Lab, Mat Phys Branch, Washington, DC 20375 USA.
Brookhaven Natl Lab, Upton, NY 11973 USA.
RP New Jersey Inst Technol, Dept Phys, Newark, NJ 07102 USA.
RI Harris, Vincent/A-8337-2009
NR 61
TC 12
Z9 12
U1 0
U2 9
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 JUL
PY 2004
VL 70
IS 2
AR 024410
DI 10.1103/PhysRevB.70.024410
PG 7
WC Physics, Condensed Matter
SC Physics
GA 842IH
UT WOS:000222996600043
ER
PT J
AU van Veenendaal, M
Fedro, AJ
AF van Veenendaal, M
Fedro, AJ
TI Spin polarization in CrO2: Competition between quasiparticle and
local-moment behavior
SO PHYSICAL REVIEW B
LA English
DT Article
ID HALF-METALLIC FERROMAGNET; DOUBLE EXCHANGE
AB We show that inclusion of the competition between quasiparticle and local-moment behavior in CrO2 is necessary to obtain good agreement between the calculated and experimentally observed spin polarization. By going beyond a single Slater determinant description, we find a spin polarization of close to 100% near the Fermi level reflecting quasi-particle behavior. At energies higher than 0.1-0.2 eV above the Fermi level, the local moment character dominates and the spin polarization is reduced to approximately 50%.
C1 No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
Argonne Natl Lab, Argonne, IL 60439 USA.
RP van Veenendaal, M (reprint author), No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
NR 16
TC 4
Z9 4
U1 0
U2 2
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 1
AR 012412
DI 10.1103/PhysRevB.70.012412
PG 4
WC Physics, Condensed Matter
SC Physics
GA 842IE
UT WOS:000222996300018
ER
PT J
AU Wu, SW
Schmalian, J
Kotliar, G
Wolynes, PG
AF Wu, SW
Schmalian, J
Kotliar, G
Wolynes, PG
TI Solution of local-field equations for self-generated glasses
SO PHYSICAL REVIEW B
LA English
DT Article
ID SPIN-GLASS; MICROPHASE SEPARATION; SPATIAL CORRELATIONS;
PHASE-SEPARATION; ORDER-PARAMETER; SOLVABLE MODEL; TRANSITION; SYSTEMS;
DYNAMICS; STATE
AB We present a self-consistent local approach to self-generated glassiness that is based on the concept of the dynamical mean field theory to many-body systems. Using a replica approach to self-generated glassiness, we map the problem onto an effective local problem that can be solved exactly. Applying the approach to the Brazovskii-model, relevant to a large class of systems with frustrated micro-phase separation, we are able to solve the self-consistent local theory without using additional approximations. We demonstrate that a glassy state found earlier in this model is generic and does not arise from the use of perturbative approximations. In addition we demonstrate that the glassy state is further stabilized by an additional asymmetry in the interaction.
C1 Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
Rutgers State Univ, Serin Phys Lab, Piscataway, NJ 08854 USA.
Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA.
Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
RP Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
RI Schmalian, Joerg/H-2313-2011
NR 57
TC 11
Z9 11
U1 1
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD JUL
PY 2004
VL 70
IS 2
AR 024207
DI 10.1103/PhysRevB.70.024207
PG 11
WC Physics, Condensed Matter
SC Physics
GA 842IH
UT WOS:000222996600027
ER
PT J
AU Xu, G
Deng, BC
Yu, ZX
Tong, SY
Van Hove, MA
Jona, F
Zasada, I
AF Xu, G
Deng, BC
Yu, ZX
Tong, SY
Van Hove, MA
Jona, F
Zasada, I
TI Atomic structure of the cleaved Si(111)-(2 X 1) surface refined by
dynamical LEED
SO PHYSICAL REVIEW B
LA English
DT Article
ID ENERGY-ELECTRON-DIFFRACTION; PLANE-WAVE METHOD; SI(111)2X1 SURFACE;
SEMICONDUCTOR SURFACES; MOLECULAR-DYNAMICS; CHAIN MODEL; RECONSTRUCTION;
DISPERSION; GEOMETRY; SILICON
AB Several alternative models have been proposed for the much-studied Si(111)-(2x1) surface structure, including: A reverse-tilted pi-bonded chain model [Zitzlsperger Surf. Sci 377, 108 (1997)]; a three-bond scission model [by Haneman, Phys. Rev. 121, 1093 (1961)]; and a pi-bonded chain model with enhanced vibrations (present work). These models are compared here to the generally accepted modified pi-bonded chain model [Himpsel , Phys. Rev. B. 30, 2257 (1984)], by analyzing low-energy electron diffraction (LEED) intensity-voltage curves measured earlier. Using the efficient automated tensor LEED technique, the models can be refined to a much greater degree than with earlier methods of LEED analysis. This study distinctly favors the earlier modified pi-bonded chain model, but with strongly enhanced vibrations. To compare models that have different numbers of adjustable free parameters, a Hamilton ratio test is used: It can distinguish between improvement due to a better model and improvement due only to more parameters.
C1 Zhongshan Univ, Dept Phys, Guangzhou 510275, Peoples R China.
City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA.
Univ Lodz, Dept Solid State Phys, Lodz, Poland.
RP Xu, G (reprint author), Zhongshan Univ, Dept Phys, Guangzhou 510275, Peoples R China.
RI Van Hove, Michel/A-9862-2008
OI Van Hove, Michel/0000-0002-8898-6921
NR 39
TC 16
Z9 16
U1 0
U2 1
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 4
AR 045307
DI 10.1103/PhysRevB.70.045307
PG 7
WC Physics, Condensed Matter
SC Physics
GA 843CO
UT WOS:000223053300033
ER
PT J
AU You, CY
Bazaliy, YB
Gu, JY
Oh, SJ
Litvak, LM
Bader, SD
AF You, CY
Bazaliy, YB
Gu, JY
Oh, SJ
Litvak, LM
Bader, SD
TI Magnetization-orientation dependence of the superconducting transition
temperature calculated for F/S/F trilayer structures
SO PHYSICAL REVIEW B
LA English
DT Article
ID MULTILAYERS; FERROMAGNET; SUPERLATTICES
AB We theoretically investigate the superconducting critical temperature T-c dependence on the relative orientation of the magnetizations in F/S/F trilayer structures, where F is a ferromagnet and S is a superconductor. The values of T-c are obtained from the linearized Usadel equations. We discuss the usual approximations employed to solve those equations and show that they are invalid in the parameter range of interest. We also compare approximate results of several authors. Adapting the numeric method used previously for F/S bilayers to the case of F/S/F trilayers, we find critical temperatures for parallel and antiparallel magnetic configurations with no approximations involved. Our results qualitatively explain experimental data and provide guidelines for optimizing the experimental systems.
C1 Inha Univ, Dept Phys, Inchon 402751, South Korea.
Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
Korea Basic Sci Inst, Mat Sci Team, Taejon 305333, South Korea.
Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA.
RP You, CY (reprint author), Inha Univ, Dept Phys, Inchon 402751, South Korea.
RI You, Chun-Yeol/B-1734-2010; Bader, Samuel/A-2995-2013
OI You, Chun-Yeol/0000-0001-9549-8611;
NR 36
TC 32
Z9 34
U1 0
U2 0
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 1
AR 014505
DI 10.1103/PhysRevB.70.014505
PG 9
WC Physics, Condensed Matter
SC Physics
GA 842IE
UT WOS:000222996300089
ER
PT J
AU Young, BL
MacLaughlin, DE
Rose, MS
Ishida, K
Bernal, OO
Lukefahr, HG
Heuser, K
Stewart, GR
Butch, NP
Ho, PC
Maple, MB
AF Young, BL
MacLaughlin, DE
Rose, MS
Ishida, K
Bernal, OO
Lukefahr, HG
Heuser, K
Stewart, GR
Butch, NP
Ho, PC
Maple, MB
TI Disorder effects near a magnetic instability in CePtSi1-xGex (x=0, 0.1)
SO PHYSICAL REVIEW B
LA English
DT Article
ID FERMI-LIQUID BEHAVIOR; LOW-TEMPERATURE PROPERTIES; KONDO DISORDER;
ELECTRON MATERIALS; MU-SR; METALS; NMR; SYSTEMS; UCU5-XPDX; COMPOUND
AB The magnetic susceptibility and nuclear magnetic resonance (NMR) linewidth have been measured in the heavy-fermion alloys CePtSi1-xGex, x=0 and 0.1, to study the role of disorder in the non-Fermi-liquid (NFL) behavior of this system. The theoretical NMR line shape is calculated from disorder-driven NFL models and shows the same essential features as the observed spectra. Analysis of Si-29 and Pt-195 NMR linewidths strongly suggests the existence of locally inhomogeneous susceptibility in both materials, and agrees with the widths of the local susceptibility distributions estimated from the susceptibility fits to the disorder-driven NFL models. Disorder-driven mechanisms can also explain the NFL behavior in CePtSi0.9Ge0.1; the NMR spectra do not, however, distinguish between the Kondo-disorder and Griffiths phase models. We find that stoichiometric CePtSi and Ge-doped CePtSi0.9Ge0.1 show similar degrees of magnetic disorder, although a narrower distribution of local susceptibilities in CePtSi allows Fermi-liquid behavior to appear below 1 K. The residual resistivity reported in CePtSi is relatively large, which indicates a significant level of intrinsic lattice defects and seems to be consistent with the disorder observed in the NMR spectra.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA.
Osaka Univ, Grad Sch Engn Sci, Dept Phys Sci, Osaka 5608531, Japan.
Calif State Univ Los Angeles, Dept Phys & Astron, Los Angeles, CA 90032 USA.
Whittier Coll, Whittier, CA 90608 USA.
Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany.
Univ Florida, Dept Phys, Gainesville, FL 32611 USA.
Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
Univ Calif San Diego, Inst Pure & Appl Phys Sci, La Jolla, CA 92093 USA.
RP Young, BL (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
NR 54
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 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD JUL
PY 2004
VL 70
IS 2
AR 024401
DI 10.1103/PhysRevB.70.024401
PG 14
WC Physics, Condensed Matter
SC Physics
GA 842IH
UT WOS:000222996600034
ER
PT J
AU Zhao, HW
Won, C
Wu, YZ
Scholl, A
Doran, A
Qiu, ZQ
AF Zhao, HW
Won, C
Wu, YZ
Scholl, A
Doran, A
Qiu, ZQ
TI Magnetic phase transition and spin-reorientation transition of
Cu/Ni/Fe/Cu(001) studied by photoemission electron microscopy
SO PHYSICAL REVIEW B
LA English
DT Article
ID ULTRATHIN NI/CU(001) FILMS; FE FILMS; TEMPERATURE; CU(100); DEPENDENCE;
NI/CU(100); FE/CU(100); THICKNESS; CU(001); STATES
AB Magnetic phase transition and spin-reorientation transition in a Cu/Ni/Fe/Cu(001) system are investigated at room temperature using photoemission electron microscopy. For fixed Fe film thickness, the Cu/Ni/Fe/Cu(100) film exhibits two transitions with increasing Ni thickness: one transition corresponds to a paramagnetic to ferromagnetic transition, and the other transition corresponds to a spin-reorientation transition. A phase diagram is constructed in the Ni-Fe thickness plane to describe these two transitions. For each transition, we find that the Ni transition thickness changes monotonically as the Fe film thickness increases from 0 to 4 ML, and then remains a constant value for Fe thickness in the range of 5-11 ML. These results are attributed to the ferromagnetic and antiferromagnetic phases of the fcc Fe film and to the in-plane Ni/Fe interfacial magnetic anisotropy.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
Chinese Acad Sci, Int Ctr Quantum Struct, Beijing 100080, Peoples R China.
Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100080, Peoples R China.
Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RI wu, YiZheng/O-1547-2013; Wu, yizheng/P-2395-2014; Scholl,
Andreas/K-4876-2012; Qiu, Zi Qiang/O-4421-2016
OI Wu, yizheng/0000-0002-9289-1271; Qiu, Zi Qiang/0000-0003-0680-0714
NR 30
TC 9
Z9 9
U1 1
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 JUL
PY 2004
VL 70
IS 2
AR 024423
DI 10.1103/PhysRevB.70.024423
PG 6
WC Physics, Condensed Matter
SC Physics
GA 842IH
UT WOS:000222996600056
ER
PT J
AU Zheng, GQ
Yamaguchi, N
Kan, H
Kitaoka, Y
Sarrao, JL
Pagliuso, PG
Moreno, NO
Thompson, JD
AF Zheng, GQ
Yamaguchi, N
Kan, H
Kitaoka, Y
Sarrao, JL
Pagliuso, PG
Moreno, NO
Thompson, JD
TI Coexistence of antiferromagnetic order and unconventional
superconductivity in heavy-fermion CeRh1-xIrxIn5 compounds: Nuclear
quadrupole resonance studies
SO PHYSICAL REVIEW B
LA English
DT Article
ID SPIN-LATTICE RELAXATION; WAVE SUPERCONDUCTIVITY; PRESSURE; UPD2AL3;
FERROMAGNETISM; CEIRIN5; CERHIN5; STATE
AB We present a systematic In-115 NQR study on the heavy-fermion compounds CeRh1-xIrxIn5 (x=0.25, 0.35, 0.45, 0.5, 0.55, and 0.75). The results provide strong evidence for the microscopic coexistence of antiferromagnetic (AF) order and superconductivity (SC) in the range of 0.35less than or equal toxless than or equal to0.55. Specifically, for x=0.5, T-N is observed at 3 K with a subsequent onset of superconductivity at T-c=0.9 K. T-c reaches a maximum (0.94 K) at x=0.45 where T-N is found to be the highest (4.0 K). Detailed analysis of the measured spectra indicate that the same electrons participate in both SC and AF order. The nuclear spin-lattice relaxation rate 1/T-1 shows a broad peak at T-N and follows a T-3 variation below T-c, the latter property indicating unconventional SC as in CeIrIn5 (T-c=0.4 K). We further find that, in the coexistence region, the T-3 dependence of 1/T-1 is replaced by a T-linear variation below Tsimilar to0.4 K, with the value (T-1)(Tc)/(T-1)(low T) increasing with decreasing x, likely due to low-lying magnetic excitations associated with the coexisting magnetism.
C1 Osaka Univ, Grad Sch Engn Sci, Dept Phys Sci, Osaka 5608531, Japan.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Zheng, GQ (reprint author), Okayama Univ, Dept Phys, Okayama 7008530, Japan.
EM zheng@psun.phys.okayama-u.ac.jp
RI Pagliuso, Pascoal/C-9169-2012; Moreno, Nelson/H-1708-2012; Zheng,
Guo-qing/B-1524-2011
OI Moreno, Nelson/0000-0002-1672-4340;
NR 37
TC 47
Z9 47
U1 0
U2 3
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 1
AR 014511
DI 10.1103/PhysRevB.70.014511
PG 9
WC Physics, Condensed Matter
SC Physics
GA 842IE
UT WOS:000222996300095
ER
PT J
AU Aclander, J
Alster, J
Asryan, G
Averiche, Y
Barton, DS
Baturin, V
Buktoyarova, N
Bunce, G
Carroll, AS
Christensen, N
Courant, H
Durrant, S
Fang, G
Gabriel, K
Gushue, S
Heller, KJ
Heppelmann, S
Kosonovsky, I
Leksanov, A
Makdisi, YI
Malki, A
Mardor, I
Mardor, Y
Marshak, ML
Martel, D
Minina, E
Minor, E
Navon, I
Nicholson, H
Ogawa, A
Panebratsev, Y
Piasetzky, E
Roser, T
Russell, JJ
Schetkovsky, A
Shimanskiy, S
Shupe, MA
Sutton, S
Tanaka, M
Tang, A
Tsetkov, I
Watson, J
White, C
Wu, JY
Zhalov, D
AF Aclander, J
Alster, J
Asryan, G
Averiche, Y
Barton, DS
Baturin, V
Buktoyarova, N
Bunce, G
Carroll, AS
Christensen, N
Courant, H
Durrant, S
Fang, G
Gabriel, K
Gushue, S
Heller, KJ
Heppelmann, S
Kosonovsky, I
Leksanov, A
Makdisi, YI
Malki, A
Mardor, I
Mardor, Y
Marshak, ML
Martel, D
Minina, E
Minor, E
Navon, I
Nicholson, H
Ogawa, A
Panebratsev, Y
Piasetzky, E
Roser, T
Russell, JJ
Schetkovsky, A
Shimanskiy, S
Shupe, MA
Sutton, S
Tanaka, M
Tang, A
Tsetkov, I
Watson, J
White, C
Wu, JY
Zhalov, D
TI Nuclear transparency in 90(c.m.)(degrees) quasielastic A(p,2p) reactions
SO PHYSICAL REVIEW C
LA English
DT Article
ID LARGE MOMENTUM-TRANSFER; COLOR-TRANSPARENCY; EXCLUSIVE REACTIONS;
LARGE-T; SCATTERING; DEPENDENCE; PROTON; RHO(0); Q(2); E'P
AB We summarize the results of two experimental programs at the Alternating Gradient Synchrotron of BNL to measure the nuclear transparency of nuclei measured in the A (p, 2p) quasielastic scattering process near 90degrees in the pp center of mass. The incident momenta varied from 5.9 to 14.4 GeV/c, corresponding to 4.8 < Q(2) < 12.7 (GeV/c)(2). Taking into account the motion of the target proton in the nucleus, the effective incident momenta extended from 5.0 to 15.8 GeV/c. First, we describe the measurements with the newer experiment, E850, which had more complete kinematic definition of quasielastic events. E850 covered a larger range of incident momenta, and thus provided more information regarding the nature of the energy dependence of the nuclear transparency. In E850 the angular dependence of the nuclear transparency near 90degrees and the nuclear transparency deuterons were studied. Second, we review the techniques used in an earlier experiment, E834, and show that the two experiments are consistent for the carbon data. E834 also determines the nuclear transparencies for lithium, aluminum, copper, and lead nuclei as well as for carbon. A determination of the (pi+,pi(+)p) transparencies is also reported. We find for both E850 and E834 that the A(p, 2p) nuclear transparency, unlike that for A(e,e'p) nuclear transparency, is incompatible with a constant value versus energy as predicted by Glauber calculations. The A (p, 2p) nuclear transparency for carbon and aluminum increases by a factor of two between 5.9 and 9.5 GeV/c incident proton momentum. At its peak the A(P,2p) nuclear transparency is similar to80% of the constant A(e,e'p) nuclear transparency. Then the nuclear transparency falls back to a value at least as small as that at 5.9 GeV/c, and is compatible with the Glauber level again. This oscillating behavior is generally interpreted as an interplay between two components of the pN scattering amplitude; one short ranged and perturbative, and the other long ranged and strongly absorbed in the nuclear medium. A study of the A dependent nuclear transparency indicates that the effective cross section varies with incident momentum and is considerably smaller than the free pN cross section. We suggest a number of experiments for further studies of nuclear transparency effects.
C1 Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel.
Brookhaven Natl Lab, Upton, NY 11973 USA.
Penn State Univ, University Pk, PA 16802 USA.
Univ Minnesota, Minneapolis, MN 55455 USA.
Univ Massachusetts, N Dartmouth, MA 02747 USA.
Joint Inst Nucl Res, Dubna 141980, Russia.
Kent State Univ, Dept Phys, Kent, OH 44242 USA.
Mt Holyoke Coll, Dept Phys, S Hadley, MA 01075 USA.
RP Asryan, G (reprint author), Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel.
NR 57
TC 26
Z9 26
U1 0
U2 1
PU AMERICAN 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 JUL
PY 2004
VL 70
IS 1
AR 015208
DI 10.1103/PhysRevC.70.015208
PG 21
WC Physics, Nuclear
SC Physics
GA 850DE
UT WOS:000223590600057
ER
PT J
AU Back, BB
Baker, MD
Ballintijn, M
Barton, DS
Becker, B
Betts, RR
Bickley, AA
Bindel, R
Busza, W
Carroll, A
Decowski, MP
Garcia, E
Gburek, T
George, N
Gulbrandsen, K
Gushue, S
Halliwell, C
Hamblen, J
Harrington, AS
Henderson, C
Hofman, DJ
Hollis, RS
Holynski, R
Holzman, B
Iordanova, A
Johnson, E
Kane, JL
Khan, N
Kulinich, P
Kuo, CM
Lee, JW
Lin, WT
Manly, S
Mignerey, AC
Nouicer, R
Olszewski, A
Pak, R
Park, IC
Pernegger, H
Reed, C
Roland, C
Roland, G
Sagerer, J
Sarin, P
Sedykh, I
Skulski, W
Smith, CE
Steinberg, P
Stephans, GSF
Sukhanov, A
Tonjes, MB
Trzupek, A
Vale, C
van Nieuwenhuizen, GJ
Verdier, R
Veres, GI
Wolfs, FLH
Wosiek, B
Wozniak, K
Wyslouch, B
Zhang, J
AF Back, BB
Baker, MD
Ballintijn, M
Barton, DS
Becker, B
Betts, RR
Bickley, AA
Bindel, R
Busza, W
Carroll, A
Decowski, MP
Garcia, E
Gburek, T
George, N
Gulbrandsen, K
Gushue, S
Halliwell, C
Hamblen, J
Harrington, AS
Henderson, C
Hofman, DJ
Hollis, RS
Holynski, R
Holzman, B
Iordanova, A
Johnson, E
Kane, JL
Khan, N
Kulinich, P
Kuo, CM
Lee, JW
Lin, WT
Manly, S
Mignerey, AC
Nouicer, R
Olszewski, A
Pak, R
Park, IC
Pernegger, H
Reed, C
Roland, C
Roland, G
Sagerer, J
Sarin, P
Sedykh, I
Skulski, W
Smith, CE
Steinberg, P
Stephans, GSF
Sukhanov, A
Tonjes, MB
Trzupek, A
Vale, C
van Nieuwenhuizen, GJ
Verdier, R
Veres, GI
Wolfs, FLH
Wosiek, B
Wozniak, K
Wyslouch, B
Zhang, J
CA PHOBOS Collaboration
TI Centrality dependence of charged antiparticle to particle ratios near
midrapidity in d+Au collisions at root s(NN)=200 GeV
SO PHYSICAL REVIEW C
LA English
DT Article
ID NUCLEAR COLLISIONS; DISTRIBUTIONS
AB The ratios of the yields of charged antiparticles to particles have been obtained for pions, kaons, and protons near midrapidity for d+Au collisions at root/s(NN)=200 GeV as a function of centrality. The reported values represent the ratio of the yields averaged over the rapidity range of 0.1 < y(pi) < 1.3 and 0 < y(K,p) <0.8, where positive rapidity is in the deuteron direction, and for transverse momenta 0.1
eta K-c decays
SO PHYSICAL REVIEW D
LA English
DT Article
ID HADRONIC DECAYS; B-DECAYS; FACTORIZATION; CHARMONIUM; RATIOS
AB We study the decays B+-->eta(c)K(+) and B-0-->eta(c)K(0), where the eta(c) is reconstructed in the K(S)(0)K(+/-)pi(-/+) and K(+)K(-)pi(0) decay modes. Results are based on a sample of 86 million B (B) over bar pairs collected with the BABAR detector at the SLAC e(+)e(-) B Factory. We measure the product of branching fractions B(B+-->eta(c)K(+))xB(eta(c)-->K (K) over bar pi)=(7.40+/-0.50+/-0.70)x10(-5) and B(B-0-->eta(c)K(0))xB(eta(c)-->K (K) over bar pi)=(6.48+/-0.85+/-0.71)x10(-5), where the first error is statistical and the second is systematic. In addition, we search for B-->eta(c)K events with eta(c)-->2(K+K-) and eta(c)-->phiphi and determine the eta(c) decay branching fraction ratios B(eta(c)-->2(K+K-))/B(eta(c)-->K (K) over bar pi)=(2.3+/-0.7+/-0.6)x10(-2) and B(eta(c)-->phiphi)/B(eta(c)-->K (K) over bar pi)=(5.5+/-1.4+/-0.5)x10(-2).
C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France.
Univ Bari, Dipartmento Fis, I-70126 Bari, Italy.
Ist Nazl Fis Nucl, I-70126 Bari, Italy.
Inst High Energy Phys, Beijing 100039, Peoples R China.
Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
Univ Calif Berkeley, Berkeley, CA 94720 USA.
Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
Ruhr Univ Bochum, Inst Expt Phys, D-44780 Bochum, Germany.
Univ Bristol, Bristol BS8 1TL, Avon, England.
Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
Brunel Univ, Uxbridge UB8 3PH, Middx, England.
Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
Univ Calif Irvine, Irvine, CA 92697 USA.
Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
Univ Calif Riverside, Riverside, CA 92521 USA.
Univ Calif San Diego, La Jolla, CA 92093 USA.
Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA.
CALTECH, Pasadena, CA 91125 USA.
Univ Cincinnati, Cincinnati, OH 45221 USA.
Univ Colorado, Boulder, CO 80309 USA.
Colorado State Univ, Ft Collins, CO 80523 USA.
Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
Ecole Polytech, LLR, F-91128 Palaiseau, France.
Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy.
Ist Nazl Fis Nucl, I-44100 Ferrara, Italy.
Florida A&M Univ, Tallahassee, FL 32307 USA.
Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy.
Ist Nazl Fis Nucl, I-16146 Genoa, Italy.
Harvard Univ, Cambridge, MA 02138 USA.
Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany.
Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
Univ Iowa, Iowa City, IA 52242 USA.
Iowa State Univ, Ames, IA 50011 USA.
Lab Accelerateur Lineaire, F-91898 Orsay, France.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Univ Liverpool, Liverpool L69 72E, Merseyside, England.
Univ London, Queen Mary, London E1 4NS, England.
Univ London, Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England.
Univ Louisville, Louisville, KY 40292 USA.
Univ Manchester, Manchester M13 9PL, Lancs, England.
Univ Maryland, College Pk, MD 20742 USA.
Univ Massachusetts, Amherst, MA 01003 USA.
MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
McGill Univ, Montreal, PQ H3A 2T8, Canada.
Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
Ist Nazl Fis Nucl, I-20133 Milan, Italy.
Univ Mississippi, University, MS 38677 USA.
Univ Montreal, Lab Rene JS Levesque, Montreal, PQ H3C 3J7, Canada.
Mt Holyoke Coll, S Hadley, MA 01075 USA.
Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy.
Ist Nazl Fis Nucl, I-80126 Naples, Italy.
NIKHEF, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands.
Univ Notre Dame, Notre Dame, IN 46556 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
Ohio State Univ, Columbus, OH 43210 USA.
Univ Oregon, Eugene, OR 97403 USA.
Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
Ist Nazl Fis Nucl, I-35131 Padua, Italy.
Univ Paris 06, Lab Phys Nucl HE, F-75252 Paris, France.
Univ Paris 07, Lab Phys Nucl HE, F-75252 Paris, France.
Univ Pavia, Dipartimento Elettr, I-27100 Pavia, Italy.
Ist Nazl Fis Nucl, I-27100 Pavia, Italy.
Univ Penn, Philadelphia, PA 19104 USA.
Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
Ist Nazl Fis Nucl, I-06100 Perugia, Italy.
Univ Pisa, Dipartimento Fis, Scuola Normale Super Pisa, I-56127 Pisa, Italy.
Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
Prairie View A&M Univ, Prairie View, TX 77446 USA.
Princeton Univ, Princeton, NJ 08544 USA.
Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
Ist Nazl Fis Nucl, I-00185 Rome, Italy.
Univ Rostock, D-18051 Rostock, Germany.
Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France.
Univ S Carolina, Columbia, SC 29208 USA.
Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
Stanford Univ, Stanford, CA 94305 USA.
SUNY Albany, Albany, NY 12222 USA.
Univ Tennessee, Knoxville, TN 37996 USA.
Univ Texas, Austin, TX 78712 USA.
Univ Texas, Richardson, TX 75083 USA.
Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
Ist Nazl Fis Nucl, I-10125 Turin, Italy.
Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy.
Ist Nazl Fis Nucl, I-34127 Trieste, Italy.
Vanderbilt Univ, Nashville, TN 37235 USA.
Univ Victoria, Victoria, BC V8W 3P6, Canada.
Univ Wisconsin, Madison, WI 53706 USA.
Yale Univ, New Haven, CT 06511 USA.
Univ Basilicata, I-85100 Potenza, Italy.
Univ Valencia, CSIC, Inst Fis Corpuscular, IFIC, Valencia, Spain.
RP Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France.
RI Negrini, Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Luppi,
Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese,
Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal,
F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere,
Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani,
Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Morandin,
Mauro/A-3308-2016; Cavallo, Nicola/F-8913-2012; Saeed, Mohammad
Alam/J-7455-2012; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008;
Bellini, Fabio/D-1055-2009; crosetti, nanni/H-3040-2011; Neri,
Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Rotondo,
Marcello/I-6043-2012; Patrignani, Claudia/C-5223-2009; de Sangro,
Riccardo/J-2901-2012; M, Saleem/B-9137-2013; Sarti, Alessio/I-2833-2012;
Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016;
Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016
OI Negrini, Matteo/0000-0003-0101-6963; Monge, Maria
Roberta/0000-0003-1633-3195; Luppi, Eleonora/0000-0002-1072-5633;
Calabrese, Roberto/0000-0002-1354-5400; Mir,
Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal,
F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere,
Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304;
Lusiani, Alberto/0000-0002-6876-3288; Lusiani,
Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; Saeed,
Mohammad Alam/0000-0002-3529-9255; Bellini, Fabio/0000-0002-2936-660X;
Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965;
Rotondo, Marcello/0000-0001-5704-6163; Patrignani,
Claudia/0000-0002-5882-1747; de Sangro, Riccardo/0000-0002-3808-5455;
Sarti, Alessio/0000-0001-5419-7951; Della Ricca,
Giuseppe/0000-0003-2831-6982; Di Lodovico,
Francesca/0000-0003-3952-2175; Calcaterra,
Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636
NR 20
TC 6
Z9 6
U1 2
U2 8
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2821
J9 PHYS REV D
JI Phys. Rev. D
PD JUL
PY 2004
VL 70
IS 1
AR 011101
DI 10.1103/PhysRevD.70.011101
PG 8
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 844DZ
UT WOS:000223138900001
ER
PT J
AU Aubert, B
Barate, R
Boutigny, D
Couderc, F
Gaillard, JM
Hicheur, A
Karyotakis, Y
Lees, JP
Tisserand, V
Zghiche, A
Palano, A
Pompili, A
Chen, JC
Qi, ND
Rong, G
Wang, P
Zhu, YS
Eigen, G
Ofte, I
Stugu, B
Abrams, GS
Borgland, AW
Breon, AB
Brown, DN
Button-Shafer, J
Cahn, RN
Charles, E
Day, CT
Gill, MS
Gritsan, AV
Groysman, Y
Jacobsen, RG
Kadel, RW
Kadyk, J
Kerth, LT
Kolomensky, YG
Kukartsev, G
LeClerc, C
Lynch, G
Merchant, AM
Mir, LM
Oddone, PJ
Orimoto, TJ
Pripstein, M
Roe, NA
Ronan, MT
Shelkov, VG
Telnov, AV
Wenzel, WA
Ford, K
Harrison, TJ
Hawkes, CM
Morgan, SE
Watson, AT
Fritsch, M
Goetzen, K
Held, T
Koch, H
Lewandowski, B
Pelizaeus, M
Steinke, M
Boyd, JT
Chevalier, N
Cottingham, WN
Kelly, MP
Latham, TE
Wilson, FF
Cuhadar-Donszelmann, T
Hearty, C
Mattison, TS
McKenna, JA
Thiessen, D
Kyberd, P
Teodorescu, L
Blinov, VE
Bukin, AD
Druzhinin, VP
Golubev, VB
Ivanchenko, VN
Kravchenko, EA
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Yushkov, AN
Best, D
Bruinsma, M
Chao, M
Eschrich, I
Kirkby, D
Lankford, AJ
Mandelkern, M
Mommsen, RK
Roethel, W
Stoker, DP
Buchanan, C
Hartfiel, BL
Gary, JW
Shen, BC
Wang, K
del Re, D
Hadavand, HK
Hill, EJ
MacFarlane, DB
Paar, HP
Rahatlou, S
Sharma, V
Berryhill, JW
Campagnari, C
Dahmes, B
Levy, SL
Long, O
Lu, A
Mazur, MA
Richman, JD
Verkerke, W
Beck, TW
Eisner, AM
Heusch, CA
Lockman, WS
Schalk, T
Schmitz, RE
Schumm, BA
Seiden, A
Spradlin, P
Williams, DC
Wilson, MG
Albert, J
Chen, E
Dubois-Felsmann, GP
Dvoretskii, A
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Ryd, A
Samuel, A
Yang, S
Jayatilleke, S
Mancinelli, G
Meadows, BT
Sokoloff, MD
Abe, T
Blanc, F
Bloom, P
Chen, S
Clark, PJ
Ford, WT
Nauenberg, U
Olivas, A
Rankin, P
Smith, JG
Zhang, L
Chen, A
Harton, JL
Soffer, A
Toki, WH
Wilson, RJ
Zeng, QL
Altenburg, D
Brandt, T
Brose, J
Colberg, T
Dickopp, M
Feltresi, E
Hauke, A
Lacker, HM
Maly, E
Muller-Pfefferkorn, R
Nogowski, R
Otto, S
Petzold, A
Schubert, J
Schubert, KR
Schwierz, R
Spaan, B
Sundermann, JE
Bernard, D
Bonneaud, GR
Brochard, F
Grenier, P
Schrenk, S
Thiebaux, C
Vasileiadis, G
Verderi, M
Bard, DJ
Khan, A
Lavin, D
Muheim, F
Playfer, S
Andreotti, M
Azzolini, V
Bettoni, D
Bozzi, C
Calabrese, R
Cibinetto, G
Luppi, E
Negrini, M
Piemontese, L
Sarti, A
Treadwell, E
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Finocchiaro, G
Patteri, P
Piccolo, M
Zallo, A
Buzzo, A
Capra, R
Contri, R
Crosetti, G
Lo Vetere, M
Macri, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Bailey, S
Brandenburg, G
Morii, M
Won, E
Dubitzky, RS
Langenegger, U
Bhimji, W
Bowerman, DA
Dauncey, PD
Egede, U
Gaillard, JR
Morton, GW
Nash, JA
Taylor, GP
Grenier, GJ
Mallik, U
Cochran, J
Crawley, HB
Lamsa, J
Meyer, WT
Prell, S
Rosenberg, EI
Yi, J
Davier, M
Grosdidier, G
Hocker, A
Laplace, S
Le Diberder, F
Lepeltier, V
Lutz, AM
Petersen, TC
Plaszczynski, S
Schune, MH
Tantot, L
Wormser, G
Cheng, CH
Lange, DJ
Simani, MC
Wright, DM
Bevan, AJ
Coleman, JP
Fry, JR
Gabathuler, E
Gamet, R
Parry, RJ
Payne, DJ
Sloane, RJ
Touramanis, C
Back, JJ
Cormack, CM
Harrison, PF
Mohanty, GB
Brown, CL
Cowan, G
Flack, RL
Flaecher, HU
Green, MG
Marker, CE
McMahon, TR
Ricciardi, S
Salvatore, F
Vaitsas, G
Winter, MA
Brown, D
Davis, CL
Allison, J
Barlow, NR
Barlow, RJ
Hart, PA
Hodgkinson, MC
Lafferty, GD
Lyon, AJ
Williams, JC
Farbin, A
Hulsbergen, WD
Jawahery, A
Kovalskyi, D
Lae, CK
Lillard, V
Roberts, DA
Blaylock, G
Dallapiccola, C
Flood, KT
Hertzbach, SS
Kofler, R
Koptchev, VB
Moore, TB
Saremi, S
Staengle, H
Willocq, S
Cowan, R
Sciolla, G
Taylor, F
Yamamoto, RK
Mangeol, DJJ
Patel, PM
Robertson, SH
Lazzaro, A
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Reidy, J
Sanders, DA
Summers, DJ
Zhao, HW
Brunet, S
Cote, D
Taras, P
Nicholson, H
Cavallo, N
Fabozzi, F
Gatto, C
Lista, L
Monorchio, D
Paolucci, P
Piccolo, D
Sciacca, C
Baak, M
Bulten, H
Raven, G
Wilden, L
Jessop, CP
LoSecco, JM
Gabriel, TA
Allmendinger, T
Brau, B
Gan, KK
Honscheid, K
Hufnagel, D
Kagan, H
Kass, R
Pulliam, T
Rahimi, AM
Ter-Antonyan, R
Wong, QK
Brau, J
Frey, R
Igonkina, O
Potter, CT
Sinev, NB
Strom, D
Torrence, E
Colecchia, F
Dorigo, A
Galeazzi, F
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Tiozzo, G
Voci, C
Benayoun, M
Briand, H
Chauveau, J
David, P
de la Vaissiere, C
Del Buono, L
Hamon, O
John, MJJ
Leruste, P
Ocariz, J
Pivk, M
Roos, L
T'Jampens, S
Therin, G
Manfredi, PF
Re, V
Behera, PK
Gladney, L
Guo, QH
Panetta, J
Anulli, F
Peruzzi, IM
Biasini, M
Pioppi, M
Angelini, C
Batignani, G
Bettarini, S
Bondioli, M
Bucci, F
Calderini, G
Carpinelli, M
Del Gamba, V
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Martinez-Vidal, F
Morganti, M
Neri, N
Paoloni, E
Rama, M
Rizzo, G
Sandrelli, F
Walsh, J
Haire, M
Judd, D
Paick, K
Wagoner, DE
Danielson, N
Elmer, P
Lu, C
Miftakov, V
Olsen, J
Smith, AJS
Bellini, F
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Li Gioi, L
Mazzoni, MA
Morganti, S
Pierini, M
Piredda, G
Tehrani, FS
Voena, C
Cavoto, G
Christ, S
Wagner, G
Waldi, R
Adye, T
De Groot, N
Franek, B
Geddes, NI
Gopal, GP
Olaiya, EO
Aleksan, R
Emery, S
Gaidot, A
Ganzhur, SF
Giraud, PF
de Monchenault, GH
Kozanecki, W
Langer, M
Legendre, M
London, GW
Mayer, B
Schott, G
Vasseur, G
Yeche, C
Zito, M
Purohit, MV
Weidemann, AW
Yumiceva, FX
Aston, D
Bartoldus, R
Berger, N
Boyarski, AM
Buchmueller, OL
Convery, MR
Cristinziani, M
De Nardo, G
Dong, D
Dorfan, J
Dujmic, D
Dunwoodie, W
Elsen, EE
Fan, S
Field, RC
Glanzman, T
Gowdy, SJ
Hadig, T
Halyo, V
Hast, C
Hryn'ova, T
Innes, WR
Kelsey, MH
Kim, P
Kocian, ML
Leith, DWGS
Libby, J
Luitz, S
Luth, V
Lynch, HL
Marsiske, H
Messner, R
Muller, DR
O'Grady, CP
Ozcan, VE
Perazzo, A
Perl, M
Petrak, S
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Simi, G
Snyder, A
Soha, A
Stelzer, J
Su, D
Sullivan, MK
Va'vra, J
Wagner, SR
Weaver, M
Weinstein, AJR
Wisniewski, WJ
Wittgen, M
Wright, DH
Yarritu, AK
Young, CC
Burchat, PR
Edwards, AJ
Meyer, TI
Petersen, BA
Roat, C
Ahmed, S
Alam, MS
Ernst, JA
Saeed, MA
Saleem, M
Wappler, FR
Bugg, W
Krishnamurthy, M
Spanier, SM
Eckmann, R
Kim, H
Ritchie, JL
Satpathy, A
Schwitters, RF
Izen, JM
Kitayama, I
Lou, XC
Ye, S
Bianchi, F
Bona, M
Gallo, F
Gamba, D
Borean, C
Bosisio, L
Cartaro, C
Cossutti, F
Della Ricca, G
Dittongo, S
Grancagnolo, S
Lanceri, L
Poropat, P
Vitale, L
Vuagnin, G
Panvini, RS
Banerjee, S
Brown, CM
Fortin, D
Jackson, PD
Kowalewski, R
Roney, JM
Band, HR
Dasu, S
Datta, M
Eichenbaum, AM
Hollar, JJ
Johnson, JR
Kutter, PE
Li, H
Liu, R
Di Lodovico, F
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Sekula, SJ
Tan, P
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Neal, H
AF Aubert, B
Barate, R
Boutigny, D
Couderc, F
Gaillard, JM
Hicheur, A
Karyotakis, Y
Lees, JP
Tisserand, V
Zghiche, A
Palano, A
Pompili, A
Chen, JC
Qi, ND
Rong, G
Wang, P
Zhu, YS
Eigen, G
Ofte, I
Stugu, B
Abrams, GS
Borgland, AW
Breon, AB
Brown, DN
Button-Shafer, J
Cahn, RN
Charles, E
Day, CT
Gill, MS
Gritsan, AV
Groysman, Y
Jacobsen, RG
Kadel, RW
Kadyk, J
Kerth, LT
Kolomensky, YG
Kukartsev, G
LeClerc, C
Lynch, G
Merchant, AM
Mir, LM
Oddone, PJ
Orimoto, TJ
Pripstein, M
Roe, NA
Ronan, MT
Shelkov, VG
Telnov, AV
Wenzel, WA
Ford, K
Harrison, TJ
Hawkes, CM
Morgan, SE
Watson, AT
Fritsch, M
Goetzen, K
Held, T
Koch, H
Lewandowski, B
Pelizaeus, M
Steinke, M
Boyd, JT
Chevalier, N
Cottingham, WN
Kelly, MP
Latham, TE
Wilson, FF
Cuhadar-Donszelmann, T
Hearty, C
Mattison, TS
McKenna, JA
Thiessen, D
Kyberd, P
Teodorescu, L
Blinov, VE
Bukin, AD
Druzhinin, VP
Golubev, VB
Ivanchenko, VN
Kravchenko, EA
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Yushkov, AN
Best, D
Bruinsma, M
Chao, M
Eschrich, I
Kirkby, D
Lankford, AJ
Mandelkern, M
Mommsen, RK
Roethel, W
Stoker, DP
Buchanan, C
Hartfiel, BL
Gary, JW
Shen, BC
Wang, K
del Re, D
Hadavand, HK
Hill, EJ
MacFarlane, DB
Paar, HP
Rahatlou, S
Sharma, V
Berryhill, JW
Campagnari, C
Dahmes, B
Levy, SL
Long, O
Lu, A
Mazur, MA
Richman, JD
Verkerke, W
Beck, TW
Eisner, AM
Heusch, CA
Lockman, WS
Schalk, T
Schmitz, RE
Schumm, BA
Seiden, A
Spradlin, P
Williams, DC
Wilson, MG
Albert, J
Chen, E
Dubois-Felsmann, GP
Dvoretskii, A
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Ryd, A
Samuel, A
Yang, S
Jayatilleke, S
Mancinelli, G
Meadows, BT
Sokoloff, MD
Abe, T
Blanc, F
Bloom, P
Chen, S
Clark, PJ
Ford, WT
Nauenberg, U
Olivas, A
Rankin, P
Smith, JG
Zhang, L
Chen, A
Harton, JL
Soffer, A
Toki, WH
Wilson, RJ
Zeng, QL
Altenburg, D
Brandt, T
Brose, J
Colberg, T
Dickopp, M
Feltresi, E
Hauke, A
Lacker, HM
Maly, E
Muller-Pfefferkorn, R
Nogowski, R
Otto, S
Petzold, A
Schubert, J
Schubert, KR
Schwierz, R
Spaan, B
Sundermann, JE
Bernard, D
Bonneaud, GR
Brochard, F
Grenier, P
Schrenk, S
Thiebaux, C
Vasileiadis, G
Verderi, M
Bard, DJ
Khan, A
Lavin, D
Muheim, F
Playfer, S
Andreotti, M
Azzolini, V
Bettoni, D
Bozzi, C
Calabrese, R
Cibinetto, G
Luppi, E
Negrini, M
Piemontese, L
Sarti, A
Treadwell, E
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Finocchiaro, G
Patteri, P
Piccolo, M
Zallo, A
Buzzo, A
Capra, R
Contri, R
Crosetti, G
Lo Vetere, M
Macri, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Bailey, S
Brandenburg, G
Morii, M
Won, E
Dubitzky, RS
Langenegger, U
Bhimji, W
Bowerman, DA
Dauncey, PD
Egede, U
Gaillard, JR
Morton, GW
Nash, JA
Taylor, GP
Grenier, GJ
Mallik, U
Cochran, J
Crawley, HB
Lamsa, J
Meyer, WT
Prell, S
Rosenberg, EI
Yi, J
Davier, M
Grosdidier, G
Hocker, A
Laplace, S
Le Diberder, F
Lepeltier, V
Lutz, AM
Petersen, TC
Plaszczynski, S
Schune, MH
Tantot, L
Wormser, G
Cheng, CH
Lange, DJ
Simani, MC
Wright, DM
Bevan, AJ
Coleman, JP
Fry, JR
Gabathuler, E
Gamet, R
Parry, RJ
Payne, DJ
Sloane, RJ
Touramanis, C
Back, JJ
Cormack, CM
Harrison, PF
Mohanty, GB
Brown, CL
Cowan, G
Flack, RL
Flaecher, HU
Green, MG
Marker, CE
McMahon, TR
Ricciardi, S
Salvatore, F
Vaitsas, G
Winter, MA
Brown, D
Davis, CL
Allison, J
Barlow, NR
Barlow, RJ
Hart, PA
Hodgkinson, MC
Lafferty, GD
Lyon, AJ
Williams, JC
Farbin, A
Hulsbergen, WD
Jawahery, A
Kovalskyi, D
Lae, CK
Lillard, V
Roberts, DA
Blaylock, G
Dallapiccola, C
Flood, KT
Hertzbach, SS
Kofler, R
Koptchev, VB
Moore, TB
Saremi, S
Staengle, H
Willocq, S
Cowan, R
Sciolla, G
Taylor, F
Yamamoto, RK
Mangeol, DJJ
Patel, PM
Robertson, SH
Lazzaro, A
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Reidy, J
Sanders, DA
Summers, DJ
Zhao, HW
Brunet, S
Cote, D
Taras, P
Nicholson, H
Cavallo, N
Fabozzi, F
Gatto, C
Lista, L
Monorchio, D
Paolucci, P
Piccolo, D
Sciacca, C
Baak, M
Bulten, H
Raven, G
Wilden, L
Jessop, CP
LoSecco, JM
Gabriel, TA
Allmendinger, T
Brau, B
Gan, KK
Honscheid, K
Hufnagel, D
Kagan, H
Kass, R
Pulliam, T
Rahimi, AM
Ter-Antonyan, R
Wong, QK
Brau, J
Frey, R
Igonkina, O
Potter, CT
Sinev, NB
Strom, D
Torrence, E
Colecchia, F
Dorigo, A
Galeazzi, F
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Tiozzo, G
Voci, C
Benayoun, M
Briand, H
Chauveau, J
David, P
de la Vaissiere, C
Del Buono, L
Hamon, O
John, MJJ
Leruste, P
Ocariz, J
Pivk, M
Roos, L
T'Jampens, S
Therin, G
Manfredi, PF
Re, V
Behera, PK
Gladney, L
Guo, QH
Panetta, J
Anulli, F
Peruzzi, IM
Biasini, M
Pioppi, M
Angelini, C
Batignani, G
Bettarini, S
Bondioli, M
Bucci, F
Calderini, G
Carpinelli, M
Del Gamba, V
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Martinez-Vidal, F
Morganti, M
Neri, N
Paoloni, E
Rama, M
Rizzo, G
Sandrelli, F
Walsh, J
Haire, M
Judd, D
Paick, K
Wagoner, DE
Danielson, N
Elmer, P
Lu, C
Miftakov, V
Olsen, J
Smith, AJS
Bellini, F
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Li Gioi, L
Mazzoni, MA
Morganti, S
Pierini, M
Piredda, G
Tehrani, FS
Voena, C
Cavoto, G
Christ, S
Wagner, G
Waldi, R
Adye, T
De Groot, N
Franek, B
Geddes, NI
Gopal, GP
Olaiya, EO
Aleksan, R
Emery, S
Gaidot, A
Ganzhur, SF
Giraud, PF
de Monchenault, GH
Kozanecki, W
Langer, M
Legendre, M
London, GW
Mayer, B
Schott, G
Vasseur, G
Yeche, C
Zito, M
Purohit, MV
Weidemann, AW
Yumiceva, FX
Aston, D
Bartoldus, R
Berger, N
Boyarski, AM
Buchmueller, OL
Convery, MR
Cristinziani, M
De Nardo, G
Dong, D
Dorfan, J
Dujmic, D
Dunwoodie, W
Elsen, EE
Fan, S
Field, RC
Glanzman, T
Gowdy, SJ
Hadig, T
Halyo, V
Hast, C
Hryn'ova, T
Innes, WR
Kelsey, MH
Kim, P
Kocian, ML
Leith, DWGS
Libby, J
Luitz, S
Luth, V
Lynch, HL
Marsiske, H
Messner, R
Muller, DR
O'Grady, CP
Ozcan, VE
Perazzo, A
Perl, M
Petrak, S
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Simi, G
Snyder, A
Soha, A
Stelzer, J
Su, D
Sullivan, MK
Va'vra, J
Wagner, SR
Weaver, M
Weinstein, AJR
Wisniewski, WJ
Wittgen, M
Wright, DH
Yarritu, AK
Young, CC
Burchat, PR
Edwards, AJ
Meyer, TI
Petersen, BA
Roat, C
Ahmed, S
Alam, MS
Ernst, JA
Saeed, MA
Saleem, M
Wappler, FR
Bugg, W
Krishnamurthy, M
Spanier, SM
Eckmann, R
Kim, H
Ritchie, JL
Satpathy, A
Schwitters, RF
Izen, JM
Kitayama, I
Lou, XC
Ye, S
Bianchi, F
Bona, M
Gallo, F
Gamba, D
Borean, C
Bosisio, L
Cartaro, C
Cossutti, F
Della Ricca, G
Dittongo, S
Grancagnolo, S
Lanceri, L
Poropat, P
Vitale, L
Vuagnin, G
Panvini, RS
Banerjee, S
Brown, CM
Fortin, D
Jackson, PD
Kowalewski, R
Roney, JM
Band, HR
Dasu, S
Datta, M
Eichenbaum, AM
Hollar, JJ
Johnson, JR
Kutter, PE
Li, H
Liu, R
Di Lodovico, F
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Sekula, SJ
Tan, P
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Neal, H
CA BaBar Collaboration
TI Limits on the decay-rate difference of neutral B mesons and on CP, T,
and CPT violation in B-0$$(B)over-bar(0) oscillations
SO PHYSICAL REVIEW D
LA English
DT Article
ID KAON SYSTEM; ASYMMETRIES; PARAMETERS; SEARCH; TESTS
AB Using events in which one of two neutral B mesons from the decay of an Y(4S) resonance is fully reconstructed, we set limits on the difference between the decay rates of the two neutral B mass eigenstates and on CP, T, and CPT violation in B-0(B) over bar (0) mixing. The reconstructed decays, comprising both CP and flavor eigenstates, are obtained from 88 million Y(4S)-->B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We determine six independent parameters governing oscillations (Deltam,DeltaGamma/Gamma), CPT and CP violation (Re z,Im z), and CP and T violation (Im lambda(CP),\q/p\), where lambda(CP) characterizes B-0 and (B) over bar (0) decays to states of charmonium plus K-S(0) or K-L(0). The results are
sgn(Re lambda(CP))DeltaGamma/Gamma=-0.008+/-0.037(stat.)+/-0.018(syst.)[-0.084,0.068],
\q/p\=1.029+/-0.013(stat.)+/-0.011(syst.)[1.001,1.057],
(Re lambda(CP)/\lambda(CP)\)Re z=0.014+/-0.035(stat.)+/-0.034(syst.)[-0.072,0.101],
Im z=0.038+/-0.029(stat.)+/-0.025(syst.)[-0.028,0.104].
The values inside square brackets indicate the 90% confidence-level intervals. The values of Im lambda(CP) and Deltam are consistent with previous analyses and are used as cross checks. These measurements are in agreement with standard model expectations.
C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France.
Univ Bari, Dipartmento Fis, I-70126 Bari, Italy.
Ist Nazl Fis Nucl, I-70126 Bari, Italy.
Inst High Energy Phys, Beijing 100039, Peoples R China.
Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
Univ Calif Berkeley, Berkeley, CA 94720 USA.
Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany.
Univ Bristol, Bristol BS8 1TL, Avon, England.
Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
Brunel Univ, Uxbridge UB8 3PH, Middx, England.
Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
Univ Calif Irvine, Irvine, CA 92697 USA.
Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
Univ Calif Riverside, Riverside, CA 92521 USA.
Univ Calif San Diego, La Jolla, CA 92093 USA.
Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA.
CALTECH, Pasadena, CA 91125 USA.
Univ Cincinnati, Cincinnati, OH 45221 USA.
Univ Colorado, Boulder, CO 80309 USA.
Colorado State Univ, Ft Collins, CO 80523 USA.
Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
Ecole Polytech, LLR, F-91128 Palaiseau, France.
Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy.
Ist Nazl Fis Nucl, I-44100 Ferrara, Italy.
Florida A&M Univ, Tallahassee, FL 32307 USA.
Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy.
Ist Nazl Fis Nucl, I-16146 Genoa, Italy.
Harvard Univ, Cambridge, MA 02138 USA.
Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany.
Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
Univ Iowa, Iowa City, IA 52242 USA.
Iowa State Univ, Ames, IA 50011 USA.
Lab Accelerateur Lineaire, F-91898 Orsay, France.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Univ Liverpool, Liverpool L69 72E, Merseyside, England.
Univ London, Queen Mary, London E1 4NS, England.
Univ London, Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England.
Univ Louisville, Louisville, KY 40292 USA.
Univ Manchester, Manchester M13 9PL, Lancs, England.
Univ Maryland, College Pk, MD 20742 USA.
Univ Massachusetts, Amherst, MA 01003 USA.
MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
McGill Univ, Montreal, PQ H3A 2T8, Canada.
Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
Ist Nazl Fis Nucl, I-20133 Milan, Italy.
Univ Mississippi, University, MS 38677 USA.
Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada.
Mt Holyoke Coll, S Hadley, MA 01075 USA.
Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy.
Ist Nazl Fis Nucl, I-80126 Naples, Italy.
Natl Inst Nucl Phys & High Energy Phys, NIKHEF, NL-1009 DB Amsterdam, Netherlands.
Univ Notre Dame, Notre Dame, IN 46556 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
Ohio State Univ, Columbus, OH 43210 USA.
Univ Oregon, Eugene, OR 97403 USA.
Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
Ist Nazl Fis Nucl, I-35131 Padua, Italy.
Univ Paris 06, Lab Phys Nucl HE, F-75252 Paris, France.
Univ Paris 07, Lab Phys Nucl HE, F-75252 Paris, France.
Univ Pavia, Dipartimento Elettr, I-27100 Pavia, Italy.
Ist Nazl Fis Nucl, I-27100 Pavia, Italy.
Univ Penn, Philadelphia, PA 19104 USA.
Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
Ist Nazl Fis Nucl, I-06100 Perugia, Italy.
Univ Pisa, Scuola Normale Super Pisa, Dipartimento Fis, I-56127 Pisa, Italy.
Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
Prairie View A&M Univ, Prairie View, TX 77446 USA.
Princeton Univ, Princeton, NJ 08544 USA.
Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
Ist Nazl Fis Nucl, I-00185 Rome, Italy.
Univ Rostock, D-18051 Rostock, Germany.
Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France.
Univ S Carolina, Columbia, SC 29208 USA.
Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
Stanford Univ, Stanford, CA 94305 USA.
SUNY Albany, Albany, NY 12222 USA.
Univ Tennessee, Knoxville, TN 37996 USA.
Univ Texas, Austin, TX 78712 USA.
Univ Texas, Richardson, TX 75083 USA.
Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
Ist Nazl Fis Nucl, I-10125 Turin, Italy.
Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy.
Ist Nazl Fis Nucl, I-34127 Trieste, Italy.
Vanderbilt Univ, Nashville, TN 37235 USA.
Univ Victoria, Victoria, BC V8W 3P6, Canada.
Univ Wisconsin, Madison, WI 53706 USA.
Yale Univ, New Haven, CT 06511 USA.
Univ Basilicata, I-85100 Potenza, Italy.
Univ Valencia, CSIC, Inst Fis Corpuscular, IFIC, Valencia, Spain.
RP Phys Particules Lab, F-74941 Annecy Le Vieux, France.
RI Lusiani, Alberto/A-3329-2016; Della Ricca, Giuseppe/B-6826-2013; Di
Lodovico, Francesca/L-9109-2016; Calcaterra, Alessandro/P-5260-2015;
Frey, Raymond/E-2830-2016; Saeed, Mohammad Alam/J-7455-2012; Negrini,
Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Luppi,
Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese,
Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal,
F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere,
Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani,
Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016; de Groot,
Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009;
crosetti, nanni/H-3040-2011; de Sangro, Riccardo/J-2901-2012; M,
Saleem/B-9137-2013; Sarti, Alessio/I-2833-2012; Cavallo,
Nicola/F-8913-2012; Roe, Natalie/A-8798-2012; Neri, Nicola/G-3991-2012;
Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani,
Claudia/C-5223-2009
OI Lusiani, Alberto/0000-0002-6876-3288; Della Ricca,
Giuseppe/0000-0003-2831-6982; Di Lodovico,
Francesca/0000-0003-3952-2175; Calcaterra,
Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636;
Cavoto, Gianluca/0000-0003-2161-918X; Re, Valerio/0000-0003-0697-3420;
Saeed, Mohammad Alam/0000-0002-3529-9255; Negrini,
Matteo/0000-0003-0101-6963; Monge, Maria Roberta/0000-0003-1633-3195;
Luppi, Eleonora/0000-0002-1072-5633; Calabrese,
Roberto/0000-0002-1354-5400; Mir, Lluisa-Maria/0000-0002-4276-715X;
Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky,
Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480;
Grancagnolo, Sergio/0000-0001-8490-8304; Lusiani,
Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240;
Bellini, Fabio/0000-0002-2936-660X; de Sangro,
Riccardo/0000-0002-3808-5455; Sarti, Alessio/0000-0001-5419-7951; Neri,
Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965;
Rotondo, Marcello/0000-0001-5704-6163; Patrignani,
Claudia/0000-0002-5882-1747
NR 43
TC 36
Z9 36
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 JUL
PY 2004
VL 70
IS 1
AR 012007
DI 10.1103/PhysRevD.70.012007
PG 26
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 844DZ
UT WOS:000223138900009
ER
PT J
AU Balazs, C
Carena, M
Wagner, CEM
AF Balazs, C
Carena, M
Wagner, CEM
TI Dark matter, light top squarks, and electroweak baryogenesis
SO PHYSICAL REVIEW D
LA English
DT Review
ID SUPERSYMMETRIC STANDARD MODEL; EXPLICIT CP VIOLATION; WEINBERG-SALAM
THEORY; HIGGS-BOSON SECTOR; FINITE-TEMPERATURE; PHASE-TRANSITION;
DIMENSIONAL REDUCTION; PARTICLE PHYSICS; FIELD-THEORY; MSSM
AB We examine the neutralino relic density in the presence of a light top squark, such as the one required for the realization of the electroweak baryogenesis mechanism, within the minimal supersymmetric standard model. We show that there are three clearly distinguishable regions of parameter space, where the relic density is consistent with WMAP and other cosmological data. These regions are characterized by annihilation cross sections mediated by either light Higgs bosons, Z bosons, or by the co-annihilation with the lightest top squark. Tevatron collider experiments can test the presence of the light top squark in most of the parameter space. In the co-annihilation region, however, the mass difference between the light top squark and the lightest neutralino varies between 15 and 30 GeV, presenting an interesting challenge for top squark searches at hadron colliders. We present the prospects for direct detection of dark matter, which provides a complementary way of testing this scenario. We also derive the required structure of the high energy soft supersymmetry breaking mass parameters where the neutralino is a dark matter candidate and the top squark spectrum is consistent with electroweak baryogenesis and the present bounds on the lightest Higgs boson mass.
C1 Argonne Natl Lab, HEP Div, Argonne, IL 60439 USA.
Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
RP Argonne Natl Lab, HEP Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 119
TC 77
Z9 77
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 JUL
PY 2004
VL 70
IS 1
AR 015007
DI 10.1103/PhysRevD.70.015007
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 844DZ
UT WOS:000223138900049
ER
PT J
AU Baltz, EA
Wai, L
AF Baltz, EA
Wai, L
TI Diffuse inverse Compton and synchrotron emission from dark matter
annihilations in galactic satellites
SO PHYSICAL REVIEW D
LA English
DT Article
ID GAMMA-RAY EMISSION; EGRET OBSERVATIONS; COSMOLOGICAL PARAMETERS; POINT
SOURCES; MILKY-WAY; HALO; GALAXY; LIMITS; PROBE; ANTIPROTONS
AB Annihilating dark matter particles produce roughly as much power in electrons and positrons as in gamma ray photons. The charged particles lose essentially all of their energy to inverse Compton and synchrotron processes in the galactic environment. We discuss the diffuse signature of dark matter annihilations in satellites of the Milky Way (which may be optically dark with few or no stars), providing a tail of emission trailing the satellite in its orbit. Inverse Compton processes provide x rays and gamma rays, and synchrotron emission at radio wavelengths might be seen. We discuss the possibility of detecting these signals with current and future observations, in particular EGRET and GLAST for the gamma rays.
C1 Stanford Univ, KIPAC, Stanford, CA 94309 USA.
SLAC, Menlo Pk, CA 94025 USA.
RP Stanford Univ, KIPAC, MS 29,POB 20450, Stanford, CA 94309 USA.
EM eabaltz@slac.stanford.edu; wai@slac.stanford.edu
NR 63
TC 49
Z9 49
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 JUL
PY 2004
VL 70
IS 2
AR 023512
DI 10.1103/PhysRevD.70.023512
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 845HQ
UT WOS:000223233400025
ER
PT J
AU Chekanov, S
Derrick, M
Krakauer, D
Loizides, JH
Magill, S
Miglioranzi, S
Musgrave, B
Repond, J
Yoshida, R
Mattingly, MCK
Antonioli, P
Bari, G
Basile, M
Bellagamba, L
Boscherini, D
Bruni, A
Bruni, G
Romeo, GC
Cifarelli, L
Cindolo, F
Contin, A
Corradi, M
De Pasquale, S
Giusti, P
Iacobucci, G
Margotti, A
Montanari, A
Nania, R
Palmonari, F
Pesci, A
Sartorelli, G
Zichichi, A
Aghuzumtsyan, G
Bartsch, D
Brock, I
Goers, S
Hartmann, H
Hilger, E
Irrgang, P
Jakob, HP
Kind, O
Meyer, U
Paul, E
Rautenberg, J
Renner, R
Stifutkin, A
Tandler, J
Voss, KC
Wang, M
Weber, A
Bailey, DS
Brook, NH
Cole, JE
Heath, GP
Namsoo, T
Robins, S
Wing, M
Capua, M
Mastroberardino, A
Schioppa, M
Susinno, G
Kim, JY
Kim, YK
Lee, JH
Lim, IT
Pac, MY
Caldwell, A
Helbich, M
Liu, X
Mellado, B
Ning, Y
Paganis, S
Ren, Z
Schmidke, WB
Sciulli, F
Chwastowski, J
Eskreys, A
Figiel, J
Galas, A
Olkiewicz, K
Stopa, P
Zawiejski, L
Adamczyk, L
Bold, T
Grabowska-Bold, I
Kisielewska, D
Kowal, AM
Kowal, M
Kowalski, T
Przybycien, M
Suszycki, L
Szuba, D
Szuba, J
Kotanski, A
Slominski, W
Adler, V
Behrens, U
Bloch, I
Borras, K
Chiochia, V
Dannheim, D
Drews, G
Fourletova, J
Fricke, U
Geiser, A
Gottlicher, P
Gutsche, O
Haas, T
Hain, W
Hillert, S
Kahle, B
Kotz, U
Kowalski, H
Kramberger, G
Labes, H
Lelas, D
Lim, H
Lohr, B
Mankel, R
Melzer-Pellmann, IA
Nguyen, CN
Notz, D
Nuncio-Quiroz, AE
Polini, A
Raval, A
Rurua, L
Schneekloth, U
Stosslein, U
Wolf, G
Youngman, C
Zeuner, W
Schlenstedt, S
Barbagli, G
Gallo, E
Genta, C
Pelfer, PG
Bamberger, A
Benen, A
Karstens, F
Dobur, D
Vlasov, NN
Bell, M
Bussey, PJ
Doyle, AT
Ferrando, J
Hamilton, J
Hanlon, S
Saxon, DH
Skillicorn, IO
Gialas, I
Carli, T
Gosau, T
Holm, U
Krumnack, N
Lohrmann, E
Milite, M
Salehi, H
Schleper, P
Stonjek, S
Wichmann, K
Wick, K
Ziegler, A
Ziegler, A
Collins-Tooth, C
Foudas, C
Goncalo, R
Long, KR
Tapper, AD
Cloth, P
Filges, D
Kataoka, M
Nagano, K
Tokushuku, K
Yamada, S
Yamazaki, Y
Barakbaev, AN
Boos, EG
Pokrovskiy, NS
Zhautykov, BO
Son, D
Piotrzkowski, K
Barreiro, F
Glasman, C
Gonzalez, O
Labarga, L
del Peso, J
Tassi, E
Terron, J
Vazquez, M
Zambrana, M
Barbi, M
Corriveau, F
Gliga, S
Lainesse, J
Padhi, S
Stairs, DG
Walsh, R
Tsurugai, T
Antonov, A
Danilov, P
Dolgoshein, BA
Gladkov, D
Sosnovtsev, V
Suchkov, S
Dementiev, RK
Ermolov, PF
Golubkov, YA
Katkov, II
Khein, LA
Korzhavina, IA
Kuzmin, VA
Levchenko, BB
Lukina, OY
Proskuryakov, AS
Shcheglova, LM
Zotkin, SA
Coppola, N
Grijpink, S
Koffeman, E
Kooijman, P
Maddox, E
Pellegrino, A
Schagen, S
Tiecke, H
Velthuis, JJ
Wiggers, L
de Wolf, E
Brummer, N
Bylsma, B
Durkin, LS
Ling, TY
Cooper-Sarkar, AM
Cottrell, A
Devenish, RCE
Foster, B
Grzelak, G
Gwenlan, C
Patel, S
Straub, PB
Walczak, R
Bertolin, A
Brugnera, R
Carlin, R
Dal Corso, F
Dusini, S
Garfagnini, A
Limentani, S
Longhin, A
Parenti, A
Posocco, M
Stanco, L
Turcato, M
Heaphy, EA
Metlica, F
Oh, BY
Whitmore, JJ
Iga, Y
D'Agostini, G
Marini, G
Nigro, A
Cormack, C
Hart, JC
McCubbin, NA
Heusch, C
Park, IH
Pavel, N
Abramowicz, H
Gabareen, A
Kananov, S
Kreisel, A
Levy, A
Kuze, M
Fusayasu, T
Kagawa, S
Kohno, T
Tawara, T
Yamashita, T
Hamatsu, R
Hirose, T
Inuzuka, M
Kaji, H
Kitamura, S
Matsuzawa, K
Ferrero, MI
Monaco, V
Sacchi, R
Solano, A
Arneodo, M
Ruspa, M
Koop, T
Martin, JF
Mirea, A
Butterworth, JM
Hall-Wilton, R
Jones, TW
Lightwood, MS
Sutton, MR
Targett-Adams, C
Ciborowski, J
Ciesielski, R
Luzniak, P
Nowak, RJ
Pawlak, JM
Sztuk, J
Tymieniecka, T
Ukleja, A
Ukleja, J
Zarnecki, AF
Adamus, M
Plucinski, P
Eisenberg, Y
Gladilin, LK
Hochman, D
Karshon, U
Riveline, M
Kcira, D
Lammers, S
Li, L
Reeder, DD
Rosin, M
Savin, AA
Smith, WH
Deshpande, A
Dhawan, S
Bhadra, S
Catterall, CD
Fourletov, S
Hartner, G
Menary, S
Soares, M
Standage, J
AF Chekanov, S
Derrick, M
Krakauer, D
Loizides, JH
Magill, S
Miglioranzi, S
Musgrave, B
Repond, J
Yoshida, R
Mattingly, MCK
Antonioli, P
Bari, G
Basile, M
Bellagamba, L
Boscherini, D
Bruni, A
Bruni, G
Romeo, GC
Cifarelli, L
Cindolo, F
Contin, A
Corradi, M
De Pasquale, S
Giusti, P
Iacobucci, G
Margotti, A
Montanari, A
Nania, R
Palmonari, F
Pesci, A
Sartorelli, G
Zichichi, A
Aghuzumtsyan, G
Bartsch, D
Brock, I
Goers, S
Hartmann, H
Hilger, E
Irrgang, P
Jakob, HP
Kind, O
Meyer, U
Paul, E
Rautenberg, J
Renner, R
Stifutkin, A
Tandler, J
Voss, KC
Wang, M
Weber, A
Bailey, DS
Brook, NH
Cole, JE
Heath, GP
Namsoo, T
Robins, S
Wing, M
Capua, M
Mastroberardino, A
Schioppa, M
Susinno, G
Kim, JY
Kim, YK
Lee, JH
Lim, IT
Pac, MY
Caldwell, A
Helbich, M
Liu, X
Mellado, B
Ning, Y
Paganis, S
Ren, Z
Schmidke, WB
Sciulli, F
Chwastowski, J
Eskreys, A
Figiel, J
Galas, A
Olkiewicz, K
Stopa, P
Zawiejski, L
Adamczyk, L
Bold, T
Grabowska-Bold, I
Kisielewska, D
Kowal, AM
Kowal, M
Kowalski, T
Przybycien, M
Suszycki, L
Szuba, D
Szuba, J
Kotanski, A
Slominski, W
Adler, V
Behrens, U
Bloch, I
Borras, K
Chiochia, V
Dannheim, D
Drews, G
Fourletova, J
Fricke, U
Geiser, A
Gottlicher, P
Gutsche, O
Haas, T
Hain, W
Hillert, S
Kahle, B
Kotz, U
Kowalski, H
Kramberger, G
Labes, H
Lelas, D
Lim, H
Lohr, B
Mankel, R
Melzer-Pellmann, IA
Nguyen, CN
Notz, D
Nuncio-Quiroz, AE
Polini, A
Raval, A
Rurua, L
Schneekloth, U
Stosslein, U
Wolf, G
Youngman, C
Zeuner, W
Schlenstedt, S
Barbagli, G
Gallo, E
Genta, C
Pelfer, PG
Bamberger, A
Benen, A
Karstens, F
Dobur, D
Vlasov, NN
Bell, M
Bussey, PJ
Doyle, AT
Ferrando, J
Hamilton, J
Hanlon, S
Saxon, DH
Skillicorn, IO
Gialas, I
Carli, T
Gosau, T
Holm, U
Krumnack, N
Lohrmann, E
Milite, M
Salehi, H
Schleper, P
Stonjek, S
Wichmann, K
Wick, K
Ziegler, A
Ziegler, A
Collins-Tooth, C
Foudas, C
Goncalo, R
Long, KR
Tapper, AD
Cloth, P
Filges, D
Kataoka, M
Nagano, K
Tokushuku, K
Yamada, S
Yamazaki, Y
Barakbaev, AN
Boos, EG
Pokrovskiy, NS
Zhautykov, BO
Son, D
Piotrzkowski, K
Barreiro, F
Glasman, C
Gonzalez, O
Labarga, L
del Peso, J
Tassi, E
Terron, J
Vazquez, M
Zambrana, M
Barbi, M
Corriveau, F
Gliga, S
Lainesse, J
Padhi, S
Stairs, DG
Walsh, R
Tsurugai, T
Antonov, A
Danilov, P
Dolgoshein, BA
Gladkov, D
Sosnovtsev, V
Suchkov, S
Dementiev, RK
Ermolov, PF
Golubkov, YA
Katkov, II
Khein, LA
Korzhavina, IA
Kuzmin, VA
Levchenko, BB
Lukina, OY
Proskuryakov, AS
Shcheglova, LM
Zotkin, SA
Coppola, N
Grijpink, S
Koffeman, E
Kooijman, P
Maddox, E
Pellegrino, A
Schagen, S
Tiecke, H
Velthuis, JJ
Wiggers, L
de Wolf, E
Brummer, N
Bylsma, B
Durkin, LS
Ling, TY
Cooper-Sarkar, AM
Cottrell, A
Devenish, RCE
Foster, B
Grzelak, G
Gwenlan, C
Patel, S
Straub, PB
Walczak, R
Bertolin, A
Brugnera, R
Carlin, R
Dal Corso, F
Dusini, S
Garfagnini, A
Limentani, S
Longhin, A
Parenti, A
Posocco, M
Stanco, L
Turcato, M
Heaphy, EA
Metlica, F
Oh, BY
Whitmore, JJ
Iga, Y
D'Agostini, G
Marini, G
Nigro, A
Cormack, C
Hart, JC
McCubbin, NA
Heusch, C
Park, IH
Pavel, N
Abramowicz, H
Gabareen, A
Kananov, S
Kreisel, A
Levy, A
Kuze, M
Fusayasu, T
Kagawa, S
Kohno, T
Tawara, T
Yamashita, T
Hamatsu, R
Hirose, T
Inuzuka, M
Kaji, H
Kitamura, S
Matsuzawa, K
Ferrero, MI
Monaco, V
Sacchi, R
Solano, A
Arneodo, M
Ruspa, M
Koop, T
Martin, JF
Mirea, A
Butterworth, JM
Hall-Wilton, R
Jones, TW
Lightwood, MS
Sutton, MR
Targett-Adams, C
Ciborowski, J
Ciesielski, R
Luzniak, P
Nowak, RJ
Pawlak, JM
Sztuk, J
Tymieniecka, T
Ukleja, A
Ukleja, J
Zarnecki, AF
Adamus, M
Plucinski, P
Eisenberg, Y
Gladilin, LK
Hochman, D
Karshon, U
Riveline, M
Kcira, D
Lammers, S
Li, L
Reeder, DD
Rosin, M
Savin, AA
Smith, WH
Deshpande, A
Dhawan, S
Bhadra, S
Catterall, CD
Fourletov, S
Hartner, G
Menary, S
Soares, M
Standage, J
CA ZEUS Collaboration
TI Bottom photoproduction measured using decays into muons in dijet events
in ep collisions at root s=318 GeV
SO PHYSICAL REVIEW D
LA English
DT Article
ID PRODUCTION CROSS-SECTION; DEEP-INELASTIC-SCATTERING; CENTRAL TRACKING
DETECTOR; ZEUS BARREL CALORIMETER; OPEN BEAUTY PRODUCTION; P(P)OVER-BAR
COLLISIONS; QUARK PRODUCTION; PARTON DISTRIBUTIONS; HADRON-COLLISIONS;
1.8 TEV
AB The photoproduction of bottom quarks in events with two jets and a muon has been measured with the ZEUS detector at HERA using an integrated luminosity of 110 pb(-1). The fraction of jets containing b quarks was extracted from the transverse momentum distribution of the muon relative to the closest jet. Differential cross sections for bottom production as a function of the transverse momentum and pseudorapidity of the muon, of the associated jet and of x(gamma)(jets), the fraction of the photon's momentum participating in the hard process, are compared with MC models and QCD predictions made at next-to-leading order. The latter give a good description of the data.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
Andrews Univ, Berrien Springs, MI 49104 USA.
Univ Bologna, Bologna, Italy.
Ist Nazl Fis Nucl, I-40126 Bologna, Italy.
Univ Bonn, Inst Phys, D-5300 Bonn, Germany.
Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England.
Univ Calabria, Dept Phys, Cosenza, Italy.
Ist Nazl Fis Nucl, Cosenza, Italy.
Chonnam Natl Univ, Kwangju, South Korea.
Columbia Univ, Nevis Labs, New York, NY 10027 USA.
Inst Nucl Phys, Krakow, Poland.
AGH Univ Sci & Technol, Fac Phys & Nucl Tech, Krakow, Poland.
Jagiellonian Univ, Dept Phys, Krakow, Poland.
DESY, D-2000 Hamburg, Germany.
DESY Zeuthen, Zeuthen, Germany.
Univ Florence, Florence, Italy.
Ist Nazl Fis Nucl, I-50125 Florence, Italy.
Univ Freiburg, Fak Phys, D-7800 Freiburg, Germany.
Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland.
Univ Aegean, Dept Engn Management & Finance, Mitilini, Greece.
Univ Hamburg, Inst Exp Phys, Hamburg, Germany.
Univ London Imperial Coll Sci Technol & Med, High Energy Nucl Phys Grp, London, England.
Forschungszentrum Julich, Inst Kernphys, D-5170 Julich, Germany.
Catholic Univ Louvain, Inst Phys Nucl, Louvain, Belgium.
Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain.
McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
Meiji Gakuin Univ, Fac Gen Educ, Yokohama, Kanagawa, Japan.
Moscow Engn Phys Inst, Moscow 115409, Russia.
Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow, Russia.
NIKHEF H, NL-1009 DB Amsterdam, Netherlands.
Univ Amsterdam, Amsterdam, Netherlands.
Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
Univ Oxford, Dept Phys, Oxford, England.
Univ Padua, Dipartimento Fis, Padua, Italy.
Ist Nazl Fis Nucl, Padua, Italy.
Penn State Univ, Dept Phys, University Pk, PA 16802 USA.
Polytech Univ, Sagamihara, Kanagawa, Japan.
Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
Ist Nazl Fis Nucl, Rome, Italy.
Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA.
Ewha Womans Univ, Dept Phys, Seoul, South Korea.
Univ Siegen, Fachbereich Phys, D-5900 Siegen, Germany.
Tel Aviv Univ, Sch Phys, Raymond & Beverly Sackler Fac Exact Sci, Tel Aviv, Israel.
Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan.
Univ Tokyo, Dept Phys, Tokyo 113, Japan.
Tokyo Metropolitan Univ, Dept Phys, Tokyo, Japan.
Univ Turin, Turin, Italy.
Ist Nazl Fis Nucl, I-10125 Turin, Italy.
Univ Piemonte Orientale, Novara, Italy.
Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada.
UCL, Dept Phys & Astron, London, England.
Univ Warsaw, Inst Expt Phys, Warsaw, Poland.
Inst Nucl Studies, PL-00681 Warsaw, Poland.
Weizmann Inst Sci, Dept Particle Phys, Rehovot, Israel.
Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
Yale Univ, Dept Phys, New Haven, CT 06520 USA.
York Univ, Dept Phys, N York, ON M3J 1P3, Canada.
Nara Womens Univ, Nara 630, Japan.
Univ Lodz, PL-90131 Lodz, Poland.
RP Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Suchkov, Sergey/M-6671-2015; dusini, stefano/J-3686-2012; Goncalo,
Ricardo/M-3153-2016; De Pasquale, Salvatore/B-9165-2008; Wing,
Matthew/C-2169-2008; collins-tooth, christopher/A-9201-2012; Ferrando,
James/A-9192-2012; Golubkov, Yury/E-1643-2012; Gladilin,
Leonid/B-5226-2011; Levchenko, B./D-9752-2012; Proskuryakov,
Alexander/J-6166-2012; Dementiev, Roman/K-7201-2012; Wiggers,
Leo/B-5218-2015; Gliga, Sebastian/K-4019-2015; Tassi, Enrico/K-3958-2015
OI dusini, stefano/0000-0002-1128-0664; Goncalo,
Ricardo/0000-0002-3826-3442; De Pasquale, Salvatore/0000-0001-9236-0748;
Ferrando, James/0000-0002-1007-7816; Gladilin,
Leonid/0000-0001-9422-8636; Wiggers, Leo/0000-0003-1060-0520; Gliga,
Sebastian/0000-0003-1729-1070;
NR 68
TC 39
Z9 39
U1 0
U2 3
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 JUL
PY 2004
VL 70
IS 1
AR 012008
DI 10.1103/PhysRevD.70.0120XX
PG 15
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 844DZ
UT WOS:000223138900010
ER
PT J
AU Chen, MC
Dawson, S
AF Chen, MC
Dawson, S
TI One-loop radiative corrections to the rho parameter in the littlest
Higgs model
SO PHYSICAL REVIEW D
LA English
DT Article
ID COMPOSITE HIGGS; VACUUM MISALIGNMENT; BREAKING; SU(2); SYMMETRY;
SCALARS; PHYSICS; MASS
AB We perform a one-loop analysis of the rho parameter in the littlest Higgs model, including the logarithmically enhanced contributions from both fermion and scalar loops. We find that the one-loop contributions are comparable to the tree level corrections in some regions of parameter space. The fermion loop contribution dominates in the low cutoff scale f region. On the other hand, the scalar loop contribution dominates in the high cutoff scale f region and it grows with the cutoff scale f. This in turn implies an upper bound on the cutoff scale. A low cutoff scale is allowed for a non-zero triplet vacuum expectation value. Constraints on various other parameters in the model are also discussed. The role of triplet scalars in constructing a consistent renormalization scheme is emphasized.
C1 Brookhaven Natl Lab, Dept Phys, High Energy Theory Grp, Upton, NY 11973 USA.
RP Brookhaven Natl Lab, Dept Phys, High Energy Theory Grp, Upton, NY 11973 USA.
EM chen@quark.phy.bnl.gov; dawson@bnl.gov
NR 39
TC 179
Z9 179
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 JUL
PY 2004
VL 70
IS 1
AR 015003
DI 10.1103/PhysRevD.70.015003
PG 21
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 844DZ
UT WOS:000223138900045
ER
PT J
AU Csaki, C
Grojean, C
Hubisz, J
Shirman, Y
Terning, J
AF Csaki, C
Grojean, C
Hubisz, J
Shirman, Y
Terning, J
TI Fermions on an interval: Quark and lepton masses without a Higgs
SO PHYSICAL REVIEW D
LA English
DT Article
ID RANDALL-SUNDRUM MODEL; SMALL EXTRA DIMENSION; YANG-MILLS THEORY; CHIRAL
HIERARCHIES; STANDARD MODEL; TECHNICOLOR THEORIES; SYMMETRY-BREAKING;
GAUGE; UNITARITY; SUPERSYMMETRY
AB We consider fermions on an extra dimensional interval. We find the boundary conditions at the ends of the interval that are consistent with the variational principle, and explain which ones arise in various physical circumstances. We apply these results to Higgsless models of electroweak symmetry breaking, where electroweak symmetry is not broken by a scalar vacuum expectation value, but rather by the boundary conditions of the gauge fields. We show that it is possible to find a set of boundary conditions for bulk fermions that would give a realistic fermion mass spectrum without the presence of a Higgs scalar, and present some sample fermion mass spectra for the standard model quarks and leptons as well as their resonances.
C1 Cornell Univ, Lab Elementary Particle Phys, Inst High Energy Phenomenol, Ithaca, NY 14853 USA.
CEA Saclay, Serv Phys Theor, F-91191 Gif Sur Yvette, France.
Michigan Ctr Theoret Phys, Ann Arbor, MI 48109 USA.
Los Alamos Natl Lab, Theory Div T 8, Los Alamos, NM 87545 USA.
RP Csaki, C (reprint author), Cornell Univ, Lab Elementary Particle Phys, Inst High Energy Phenomenol, Ithaca, NY 14853 USA.
EM csaki@mail.lns.cornell.edu; grojean@spht.saclay.cea.fr;
hubisz@mail.lns.cornell.edu; shirman@lanl.gov; terning@lanl.gov
OI grojean, christophe/0000-0002-7196-7361
NR 60
TC 122
Z9 122
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2821
J9 PHYS REV D
JI Phys. Rev. D
PD JUL
PY 2004
VL 70
IS 1
AR 015012
DI 10.1103/PhysRevD.70.015012
PG 18
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 844DZ
UT WOS:000223138900054
ER
PT J
AU Davoudiasl, H
Hewett, JL
Lillie, B
Rizzo, TG
AF Davoudiasl, H
Hewett, JL
Lillie, B
Rizzo, TG
TI Electroweak symmetry breaking without a Higgs boson in warped
backgrounds: Constraints and signatures
SO PHYSICAL REVIEW D
LA English
DT Article
ID EXTENDED GAUGE-MODELS; DIMENSIONS; MASS; UNITARITY; HIERARCHY;
COLLIDERS; GRAVITY; PHYSICS; FIELDS
AB We examine the phenomenology of a warped 5-dimensional model based on the SU(2)(L)xSU(2)(R)xU(1)(B-L) model which implements electroweak symmetry breaking through boundary conditions, without the presence of a Higgs boson. We use precision electroweak data to constrain the general parameter space of this model. Our analysis includes independent L and R gauge couplings, radiatively induced UV boundary gauge kinetic terms, and all higher order corrections from the curvature of the 5D space. We show that this setup can be brought into good agreement with the precision electroweak data for typical values of the parameters. However, we find that the entire range of model parameters leads to violation of perturbative unitarity in gauge boson scattering and hence this model is not a reliable perturbative framework. Assuming that unitarity can be restored in a modified version of this scenario, we consider the collider signatures. It is found that new spin-1 states will be observed at the CERN Large Hadron Collider and measurement of their properties would identify this model. However, the spin-2 graviton Kaluza-Klein resonances, which are a hallmark of the Randall-Sundrum model, are too weakly coupled to be detected.
C1 Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA.
Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
RP Davoudiasl, H (reprint author), Inst Adv Study, Sch Nat Sci, Olden Lane, Princeton, NJ 08540 USA.
EM hooman@ias.edu; hewett@slac.stanford.edu; lillieb@slac.stanford.edu;
rizzo@slac.stanford.edu
NR 41
TC 57
Z9 57
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2821
J9 PHYS REV D
JI Phys. Rev. D
PD JUL
PY 2004
VL 70
IS 1
AR 015006
DI 10.1103/PhysRevD.70.015006
PG 21
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 844DZ
UT WOS:000223138900048
ER
PT J
AU Dodelson, S
AF Dodelson, S
TI Cluster masses: Accounting for structure along the line of sight
SO PHYSICAL REVIEW D
LA English
DT Article
ID INTRINSIC ALIGNMENTS; GALAXY CLUSTERS; COMPLETENESS; CONSTRAINTS;
EVOLUTION; SEARCHES; OMEGA
AB Weak gravitational lensing of background galaxies by foreground clusters offers an excellent opportunity to measure cluster masses directly without using gas as a probe. One source of noise which seems difficult to avoid is large scale structure along the line of sight. Here I show that the spatial properties of this noise are sufficiently distinct that it can be efficiently weeded out using standard map-making techniques.
C1 Fermilab Natl Accelerator Lab, NASA Fermilab Astrophys Ctr, Batavia, IL 60510 USA.
Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
RP Fermilab Natl Accelerator Lab, NASA Fermilab Astrophys Ctr, POB 500, Batavia, IL 60510 USA.
NR 26
TC 37
Z9 37
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 JUL
PY 2004
VL 70
IS 2
AR 023008
DI 10.1103/PhysRevD.70.023008
PG 5
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 845HQ
UT WOS:000223233400011
ER
PT J
AU Dodelson, S
AF Dodelson, S
TI CMB-cluster lensing
SO PHYSICAL REVIEW D
LA English
DT Article
ID DARK-MATTER HALOS; GALAXY CLUSTERS; DENSITY PROFILE; MASS FUNCTION;
CONSTRAINTS; ABUNDANCE; EVOLUTION; SIGMA(8); ENERGY
AB Clusters of galaxies are powerful cosmological probes, particularly if their masses can be determined. One possibility for mass determination is to study the cosmic microwave background (CMB) on small angular scales and observe deviations from a pure gradient due to lensing of massive clusters. I show that, neglecting contamination, this technique has the power to determine cluster masses very accurately, in agreement with estimates by Seljak and Zaldarriaga. However, the intrinsic small scale structure of the CMB significantly degrades this power. The resulting mass constraints are useless unless one imposes a prior on the concentration parameter c. With a modest prior on c, an ambitious CMB experiment (0.5(') resolution and 1 muK per pixel) could determine masses of high redshift (z>0.7), large (M>5x10(14)h(-1)M) clusters with similar to30% accuracy.
C1 Fermilab Natl Accelerator Lab, NASA Fermilab Astrophys Ctr, Batavia, IL 60510 USA.
Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
RP Fermilab Natl Accelerator Lab, NASA Fermilab Astrophys Ctr, POB 500, Batavia, IL 60510 USA.
EM dodelson@fnal.gov
NR 39
TC 15
Z9 15
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD JUL
PY 2004
VL 70
IS 2
AR 023009
DI 10.1103/PhysRevD.70.023009
PG 7
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 845HQ
UT WOS:000223233400012
ER
PT J
AU Eberle, B
Ringwald, A
Song, LG
Weiler, TJ
AF Eberle, B
Ringwald, A
Song, LG
Weiler, TJ
TI Relic neutrino absorption spectroscopy
SO PHYSICAL REVIEW D
LA English
DT Review
ID ENERGY COSMIC-RAYS; DOUBLE-BETA DECAY; STAR-FORMATION; DARK-MATTER;
UPPER LIMIT; SPECTRUM; MASS; OSCILLATIONS; UNIVERSE; DEGENERACY
AB Resonant annihilation of extremely high-energy cosmic neutrinos on big-bang relic anti-neutrinos (and vice versa) into Z bosons leads to sizable absorption dips in the neutrino flux to be observed at Earth. The high-energy edges of these dips are fixed, via the resonance energies, by the neutrino masses alone. Their depths are determined by the cosmic neutrino background density, by the cosmological parameters determining the expansion rate of the Universe, and by the large redshift history of the cosmic neutrino sources. We investigate the possibility of determining the existence of the cosmic neutrino background within the next decade from a measurement of these absorption dips in the neutrino flux. As a by-product, we study the prospects to infer the absolute neutrino mass scale. We find that, with the presently planned neutrino detectors (ANITA, Auger, EUSO, OWL, RICE, and SalSA) operating in the relevant energy regime above 10(21) eV, relic neutrino absorption spectroscopy becomes a realistic possibility. It requires, however, the existence of extremely powerful neutrino sources, which should be opaque to nucleons and high-energy photons to evade present constraints. Furthermore, the neutrino mass spectrum must be quasidegenerate to optimize the dip, which implies m(nu)greater than or similar to0.1 eV for the lightest neutrino. With a second generation of neutrino detectors, these demanding requirements can be relaxed considerably.
C1 DESY, D-22607 Hamburg, Germany.
Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
Stanford Linear Accelerator Ctr, Kavli Inst Particle Astrophys & Cosmol, Menlo Pk, CA 94025 USA.
RP DESY, Notkestr 85, D-22607 Hamburg, Germany.
NR 109
TC 41
Z9 41
U1 1
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 JUL
PY 2004
VL 70
IS 2
AR 023007
DI 10.1103/PhysRevD.70.023007
PG 17
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 845HQ
UT WOS:000223233400010
ER
PT J
AU Freitas, A
AF Freitas, A
TI Weakly coupled neutral gauge bosons at future linear colliders
SO PHYSICAL REVIEW D
LA English
DT Article
ID LEP
AB A weakly coupled new neutral gauge boson forms a narrow resonance that is hard to discover directly in e(+)e(-) collisions. However, if the gauge boson mass is below the center-of-mass energy, it can be produced through processes where the effective energy is reduced due to initial-state radiation and beamstrahlung. It is shown that at a high-luminosity linear collider, such a gauge boson can be searched for with very high sensitivity, leading to a substantial improvement compared to existing limits from the Tevatron and also extending beyond the expected reach of the LHC in most models. If a new vector boson is discovered either at the Tevatron Run II, the LHC, or the linear collider, its properties can be determined at the linear collider with high precision, thus helping to reveal the origin of the new boson.
C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Freitas, A (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA.
NR 42
TC 15
Z9 15
U1 1
U2 1
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2821
J9 PHYS REV D
JI Phys. Rev. D
PD JUL
PY 2004
VL 70
IS 1
AR 015008
DI 10.1103/PhysRevD.70.015008
PG 12
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 844DZ
UT WOS:000223138900050
ER
PT J
AU Harnik, R
Kribs, GD
Larson, DT
Murayama, H
AF Harnik, R
Kribs, GD
Larson, DT
Murayama, H
TI Minimal supersymmetric fat Higgs model
SO PHYSICAL REVIEW D
LA English
DT Article
ID GAUGE-THEORIES; COMPOSITE HIGGS; STANDARD MODELS; BOSON MASS;
ELECTROWEAK BREAKING; SYMMETRY-BREAKING; GUT BREAKING; UPPER-BOUNDS;
MU-PROBLEM; B-DECAYS
AB We present a calculable supersymmetric theory of a composite "fat" Higgs boson. Electroweak symmetry is broken dynamically through a new gauge interaction that becomes strong at an intermediate scale. The Higgs boson mass can easily be 200-450 GeV along with the superpartner masses, solving the supersymmetric little hierarchy problem. We explicitly verify that the model is consistent with precision electroweak data without fine-tuning. Gauge coupling unification can be maintained despite the inherently strong dynamics involved in electroweak symmetry breaking. Supersymmetrizing the standard model therefore does not imply a light Higgs boson mass, contrary to the lore in the literature. The Higgs sector of the minimal fat Higgs model has a mass spectrum that is distinctly different from that of the minimal supersymmetric standard model.
C1 Univ Calif Berkeley, Theoret Phys Grp, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA.
RP Univ Calif Berkeley, Theoret Phys Grp, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
EM roni@socrates.berkeley.edu; kribs@ias.edu;
dtlarson@socrates.berkeley.edu; murayama@ias.edu
RI Murayama, Hitoshi/A-4286-2011
NR 69
TC 162
Z9 162
U1 1
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD JUL
PY 2004
VL 70
IS 1
AR 015002
DI 10.1103/PhysRevD.70.015002
PG 13
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 844DZ
UT WOS:000223138900044
ER
PT J
AU Linder, EV
AF Linder, EV
TI Probing gravitation, dark energy, and acceleration
SO PHYSICAL REVIEW D
LA English
DT Article
ID COSMOLOGICAL CONSTANT; SUPERNOVAE; UNIVERSE
AB The acceleration of the expansion of the universe arises from unknown physical processes involving either new fields in high energy physics or modifications of gravitation theory. It is crucial for our understanding to characterize the properties of the dark energy or gravity through cosmological observations and compare and distinguish between them. In fact, close consistencies exist between a dark energy equation of state function w(z) and changes to the framework of the Friedmann cosmological equations as well as direct spacetime geometry quantities involving the acceleration, such as "geometric dark energy" from the Ricci scalar. We investigate these interrelationships, including for the case of superacceleration or phantom energy where the fate of the universe may be more gentle than the Big Rip.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Phys, Berkeley, CA 94720 USA.
RP Univ Calif Berkeley, Lawrence Berkeley Lab, Div Phys, Berkeley, CA 94720 USA.
NR 26
TC 80
Z9 81
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 JUL
PY 2004
VL 70
IS 2
AR 023511
DI 10.1103/PhysRevD.70.023511
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 845HQ
UT WOS:000223233400024
ER
PT J
AU Majumder, A
Wang, XN
AF Majumder, A
Wang, XN
TI Dihadron fragmentation function and its evolution
SO PHYSICAL REVIEW D
LA English
DT Article
ID PARTON ENERGY-LOSS; QCD JETS; SIMPLE ALGORITHM; SCATTERING; COLLISIONS
AB Dihadron fragmentation functions and their evolution are studied in the process of e(+)e(-) annihilation. Under the collinear factorization approximation and facilitated by the cut-vertex technique, the two hadron inclusive cross section at leading order is shown to factorize into a short distance parton cross section and a long distance dihadron fragmentation function. We provide the definition of such a dihadron fragmentation function in terms of parton matrix elements and derive its Dokshitzer-Gribov-Lipatov-Altarelli-Parisi evolution equation at leading log. The evolution equation for the nonsinglet quark fragmentation function is solved numerically with a simple ansatz for the initial condition and results are presented for cases of physical interest.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
RP Majumder, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
NR 28
TC 43
Z9 43
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2821
J9 PHYS REV D
JI Phys. Rev. D
PD JUL
PY 2004
VL 70
IS 1
AR 014007
DI 10.1103/PhysRevD.70.014007
PG 26
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 844DZ
UT WOS:000223138900022
ER
PT J
AU Martin, SP
AF Martin, SP
TI Two-loop scalar self-energies in a general renormalizable theory at
leading order in gauge couplings
SO PHYSICAL REVIEW D
LA English
DT Review
ID EXPLICIT CP VIOLATION; HIGGS-BOSON MASSES; SUPERSYMMETRIC STANDARD
MODEL; DIFFERENTIAL-EQUATIONS METHOD; VS. POLE MASSES; NUMERICAL
EVALUATION; FEYNMAN DIAGRAMS; THRESHOLD EXPANSION; MASTER INTEGRALS;
ASYMPTOTIC EXPANSIONS
AB I present results for the two-loop self-energy functions for scalars in a general renormalizable field theory, using mass-independent renormalization schemes based on dimensional regularization and dimensional reduction. The results are given in terms of a minimal set of loop-integral basis functions, which are readily evaluated numerically by computers. This paper contains the contributions corresponding to the Feynman diagrams with zero or one vector propagator lines. These are the ones needed to obtain the pole masses of the neutral and charged Higgs scalar bosons in supersymmetry, neglecting only the purely electroweak parts at two-loop order. A subsequent paper will present the results for the remaining diagrams, which involve two or more vector lines. I also include an illustrative example, featuring several nontrivial consistency checks.
C1 No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Martin, SP (reprint author), No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
NR 104
TC 50
Z9 50
U1 1
U2 1
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2821
J9 PHYS REV D
JI Phys. Rev. D
PD JUL
PY 2004
VL 70
IS 1
AR 016005
DI 10.1103/PhysRevD.70.016005
PG 27
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 844DZ
UT WOS:000223138900059
ER
PT J
AU Page, PR
AF Page, PR
TI Selection rules for J(PC) exotic hybrid meson decay in large N-c
SO PHYSICAL REVIEW D
LA English
DT Article
ID ETA-PI; QCD
AB The coupling of a neutral hybrid {1,3,5...}(-+) exotic particle (or current) to two neutral (hybrid) meson particles with the same J(PC) and J=0 is proved to be sub-leading to the usual large-N-c QCD counting. The coupling of the same exotic particle to certain two (hybrid) meson currents with the same J(PC) and J=0 is also sub-leading. The decay of a {1,3,5...}(-+) hybrid particle to etapi(0),eta(')pi(0),eta(')eta,eta(1295)pi(0), pi(1300)(0)pi(0), eta(1440)pi(0), a(0)(980)(0)sigma or f(0)(980)sigma is sub-leading, assuming that these final state particles are (hybrid) mesons in the limit of large N-c.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Los Alamos Natl Lab, Div Theoret, MS B283, Los Alamos, NM 87545 USA.
EM prp@lanl.gov
RI Page, Philip/L-1885-2015
OI Page, Philip/0000-0002-2201-6703
NR 20
TC 5
Z9 5
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 JUL
PY 2004
VL 70
IS 1
AR 016004
DI 10.1103/PhysRevD.70.016004
PG 7
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 844DZ
UT WOS:000223138900058
ER
PT J
AU Dwivedi, V
Ahluwalia, R
Lookman, T
Saxena, A
AF Dwivedi, V
Ahluwalia, R
Lookman, T
Saxena, A
TI Viscoelastic properties of dynamically asymmetric binary fluids under
shear flow
SO PHYSICAL REVIEW E
LA English
DT Article
ID PHASE-SEPARATING FLUIDS; POLYMER-SOLUTIONS; SIMULATIONS; COPOLYMER;
MIXTURES; BLENDS
AB We study theoretically the viscoelastic properties of sheared binary fluids that have strong dynamical asymmetry between the two components. The dynamical asymmetry arises due to asymmetry between the viscoelastic stresses, particularly the bulk stress. Our calculations are based on the two-fluid model that incorporates the asymmetric stress distribution. We simulate the phase separation process under an externally imposed shear and compare the asymmetric case with the usual phase separation under shear flow without viscoelastic effects. We also simulate the behavior of phase-separated stable morphologies under applied shear and compute the stress relaxation.
C1 Univ Calif Santa Barbara, Dept Mech & Environm Engn, Santa Barbara, CA 93106 USA.
Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Dwivedi, V (reprint author), Univ Calif Santa Barbara, Dept Mech & Environm Engn, Santa Barbara, CA 93106 USA.
NR 22
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 1539-3755
J9 PHYS REV E
JI Phys. Rev. E
PD JUL
PY 2004
VL 70
IS 1
AR 011506
DI 10.1103/PhysRevE.70.011506
PN 1
PG 10
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 844CP
UT WOS:000223135200024
ER
PT J
AU Ferer, M
Ji, C
Bromhal, GS
Cook, J
Ahmadi, G
Smith, DH
AF Ferer, M
Ji, C
Bromhal, GS
Cook, J
Ahmadi, G
Smith, DH
TI Crossover from capillary fingering to viscous fingering for immiscible
unstable flow: Experiment and modeling
SO PHYSICAL REVIEW E
LA English
DT Article
ID DIFFUSION-LIMITED AGGREGATION; POROUS-MEDIA; INVASION PERCOLATION;
FRACTAL DIMENSION; 2-PHASE FLOW; DISPLACEMENT; SIMULATIONS; DYNAMICS;
AVALANCHES; INTERFACES
AB Invasion percolation with trapping (IPT) and diffusion-limited aggregation (DLA) are simple fractal models, which are known to describe two-phase flow in porous media at well defined, but unphysical limits of the fluid properties and flow conditions. A decade ago, Fernandez, Rangel, and Rivero predicted a crossover from IPT (capillary fingering) to DLA (viscous fingering) for the injection of a zero-viscosity fluid as the injection velocity was increased from zero. [ J. F. Fernandez, R. Rangel, and J. Rivero, Phys. Rev. Lett. 67, 2958 (1991) ]. We have performed experiments in which air is injected into a glass micromodel to displace water. These experiments clearly demonstrate this crossover as the injection velocity of the air is increased. Furthermore, simulations, using our standard pore-level model, also support the predicted IPT-to-DLA crossover, as well as the predicted power-law behavior of the characteristic crossover length.
C1 US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA.
W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA.
Clarkson Univ, Dept Mech & Aeronaut Engn, Potsdam, NY 13699 USA.
RP Ferer, M (reprint author), US DOE, Natl Energy Technol Lab, POB 880, Morgantown, WV 26507 USA.
NR 48
TC 36
Z9 37
U1 1
U2 16
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
J9 PHYS REV E
JI Phys. Rev. E
PD JUL
PY 2004
VL 70
IS 1
AR 016303
DI 10.1103/PhysRevE.70.016303
PN 2
PG 7
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 844CV
UT WOS:000223135800056
PM 15324165
ER
PT J
AU Fournier, KB
Faenov, AY
Pikuz, TA
Magunov, AI
Skobelev, IY
Flora, F
Bollanti, S
Lazzaro, PD
Murra, D
Belyaev, VS
Vinogradov, VI
Kyrilov, AS
Matafonov, AP
Francucci, M
Martellucci, S
Petrocelli, G
AF Fournier, KB
Faenov, AY
Pikuz, TA
Magunov, AI
Skobelev, IY
Flora, F
Bollanti, S
Lazzaro, PD
Murra, D
Belyaev, VS
Vinogradov, VI
Kyrilov, AS
Matafonov, AP
Francucci, M
Martellucci, S
Petrocelli, G
TI Analysis of high-n dielectronic Rydberg satellites in the spectra of
Na-like Zn XX and Mg-like Zn XIX
SO PHYSICAL REVIEW E
LA English
DT Article
ID ULTRASHORT LASER-PULSES; PLASMAS; DENSITY; TRANSITIONS; IONS; EMISSION;
DRIVEN
AB We have observed spectra from highly charged zinc ions in a variety of laser-produced plasmas. Spectral features that are Na- and Mg-like satellites to high-n Rydberg transitions in the Ne-like Zn XXI spectrum are analyzed and modeled. Identifications and analysis are made by comparison with highly accurate atomic structure calculations and steady state collisional-radiative models. Each observed Zn XX and Zn XIX feature comprises up to approximate to2 dozen individual transitions, these transitions are excited principally by dielectronic recombination through autoionizing levels in Na- and Mg-like Zn(19+) and Zn(18+). We find these satellites to be ubiquitous in laser-produced plasmas formed by lasers with pulse lengths that span four orders of magnitude, from 1 ps to approximate to10 ns. The diagnostic potential of these Rydberg satellite lines is demonstrated.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Multicharged Ions Spectra Data Ctr VNIIFTRI, Moscow 141570, Russia.
ENEA, Dipartimento Innovaz, I-00044 Frascati, Roma, Italy.
Cent Res Inst Machine Bldg, Korolev 141070, Moscow Region, Russia.
Univ Roma Tor Vergata, INFM, Dipartimento Sci & Tecnol & Energet, I-00133 Rome, Italy.
RP Fournier, KB (reprint author), Lawrence Livermore Natl Lab, POB 808,L-41, Livermore, CA 94550 USA.
NR 26
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 1539-3755
J9 PHYS REV E
JI Phys. Rev. E
PD JUL
PY 2004
VL 70
IS 1
AR 016406
DI 10.1103/PhysRevE.70.016406
PN 2
PG 15
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 844CV
UT WOS:000223135800068
PM 15324177
ER
PT J
AU Fubiani, G
Esarey, E
Schroeder, CB
Leemans, WP
AF Fubiani, G
Esarey, E
Schroeder, CB
Leemans, WP
TI Beat wave injection of electrons into plasma waves using two interfering
laser pulses
SO PHYSICAL REVIEW E
LA English
DT Article
ID ACCELERATION; WAKEFIELD; PROPAGATION
AB An electron injector concept that uses a single injection laser pulse colliding with a pump laser pulse in a plasma is analyzed. The pump pulse generates a large amplitude laser wakefield (plasma wave). The counterpropagating injection pulse collides with the pump laser pulse to generate a beat wave with a slow phase velocity. The ponderomotive force of the slow beat wave is responsible for injecting plasma electrons into the wakefield near the back of the pump pulse. Test particle simulations indicate that significant amounts of charge can be trapped and accelerated (similar to10 pC). For higher charge, beam loading limits the validity of the simulations. The accelerated bunches are ultrashort (similar to1 fs) with good beam quality (relative energy spread of a few percent at a mean energy of similar to10 MeV and a normalized root-mean-square emittance on the order 0.4 mm mrad). The effects of interaction angle and polarization are also explored, e.g., efficient trapping can occur for near-collinear geometries. Beat wave injection using a single injection pulse has the advantages of simplicity, ease of experimental implementation, and requires modest laser intensity <10(18) W/cm(2).
C1 Univ Paris 11, Orsay, France.
RP Fubiani, G (reprint author), Univ Calif Berkeley, Ernest Orlando Lawrence Natl Lab, Ctr Beam Phys, Berkeley, CA 94720 USA.
EM gjfubiani@lbl.gov
OI Schroeder, Carl/0000-0002-9610-0166
NR 26
TC 99
Z9 101
U1 2
U2 9
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 JUL
PY 2004
VL 70
IS 1
AR 016402
DI 10.1103/PhysRevE.70.016402
PN 2
PG 12
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 844CV
UT WOS:000223135800064
PM 15324173
ER
PT J
AU Heine, DR
Grest, GS
Webb, EB
AF Heine, DR
Grest, GS
Webb, EB
TI Spreading dynamics of polymer nanodroplets in cylindrical geometries
SO PHYSICAL REVIEW E
LA English
DT Article
ID LIQUID-VAPOR INTERFACE; MOLECULAR-DYNAMICS; SOLID-SURFACE; MICROSCOPIC
SCALE; WETTING BEHAVIOR; CHAIN MOLECULES; DROPLET; MIXTURES; SIMULATION;
DEPENDENCE
AB The spreading of one- and two-component polymer nanodroplets is studied using molecular dynamics simulation in a cylindrical geometry. The droplets consist of polymer chains of length 10, 40, and 100 monomers per chain described by the bead-spring model spreading on a flat surface with a surface-coupled Langevin thermostat. Each droplet contains similar to350 000 monomers. The dynamics of the individual components of each droplet is analyzed and compared to the dynamics of single-component droplets for the spreading rates of the precursor foot and bulk droplet, the time evolution of the contact angle, and the velocity distribution inside the droplet. We derive spreading models for the cylindrical geometry analogous to the kinetic and hydrodynamic models previously developed for the spherical geometry, and show that hydrodynamic behavior is observed at earlier times for the cylindrical geometry. The contact radius is predicted to scale as r(t)similar tot(1/5) from the kinetic model and r(t)similar tot(1/7) for the hydrodynamic model in the cylindrical geometry.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Heine, DR (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 44
TC 31
Z9 31
U1 1
U2 8
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 JUL
PY 2004
VL 70
IS 1
AR 011606
DI 10.1103/PhysRevE.70.011606
PN 1
PG 10
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 844CP
UT WOS:000223135200033
PM 15324064
ER
PT J
AU Li, WD
Smerzi, A
AF Li, WD
Smerzi, A
TI Nonlinear Kronig-Penney model
SO PHYSICAL REVIEW E
LA English
DT Article
ID OPTICAL LATTICES; EINSTEIN
AB We study the nonlinear Schrodinger equation with a periodic delta-function potential. This realizes a nonlinear Kronig-Penney model, with physical applications in the context of trapped Bose-Einstein condensate alkaly gases and in the transmission of signals in optical fibers. We find analytical solutions of zero-current Bloch states. Such wave functions have the same periodicity of the potential, and, in the linear limit, reduce to the Bloch functions of the Kronig-Penney model. We also find classes of solutions having a periodicity different from that of the external potential. We calculate the chemical potential of such states and compare it with the linear excitation spectrum.
C1 Univ Trent, Ist Nazl Fis Mat BEC CRS, I-38050 Trento, Italy.
Univ Trent, Dipartimento Fis, I-38050 Trento, Italy.
Shanxi Univ, Dept Phys, Taiyuan 030006, Peoples R China.
Shanxi Univ, Inst Theoret Phys, Taiyuan 030006, Peoples R China.
Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Univ Trent, Ist Nazl Fis Mat BEC CRS, I-38050 Trento, Italy.
NR 22
TC 27
Z9 28
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0045
EI 2470-0053
J9 PHYS REV E
JI Phys. Rev. E
PD JUL
PY 2004
VL 70
IS 1
AR 016605
DI 10.1103/PhysRevE.70.016605
PN 2
PG 4
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 844CV
UT WOS:000223135800078
PM 15324187
ER
PT J
AU Patriarca, M
Chakraborti, A
Kaski, K
AF Patriarca, M
Chakraborti, A
Kaski, K
TI Statistical model with a standard Gamma distribution
SO PHYSICAL REVIEW E
LA English
DT Article
ID POWER-LAW; SAVING PROPENSITY; WEALTH; MONEY; MECHANICS; ECONOMY; INCOME;
MARKET
AB We study a statistical model consisting of N basic units which interact with each other by exchanging a physical entity, according to a given microscopic random law, depending on a parameter lambda. We focus on the equilibrium or stationary distribution of the entity exchanged and verify through numerical fitting of the simulation data that the final form of the equilibrium distribution is that of a standard Gamma distribution. The model can be interpreted as a simple closed economy in which economic agents trade money and a saving criterion is fixed by the saving propensity lambda. Alternatively, from the nature of the equilibrium distribution, we show that the model can also be interpreted as a perfect gas at an effective temperature T(lambda), where particles exchange energy in a space with an effective dimension D(lambda).
C1 Helsinki Univ Technol, Lab Comput Engn, Espoo 02015, Finland.
Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Patriarca, M (reprint author), Helsinki Univ Technol, Lab Comput Engn, POB 9203, Espoo 02015, Finland.
EM marco@lce.hut.fi; anirban@bnl.gov; kimmo.kaski@hut.fi
RI Chakraborti, Anirban/A-4565-2010; Kaski, Kimmo/G-8067-2012; Patriarca,
Marco/D-8759-2013
OI Chakraborti, Anirban/0000-0002-6235-0204; Patriarca,
Marco/0000-0001-6743-2914
NR 21
TC 73
Z9 73
U1 0
U2 7
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
J9 PHYS REV E
JI Phys. Rev. E
PD JUL
PY 2004
VL 70
IS 1
AR 016104
DI 10.1103/PhysRevE.70.016104
PN 2
PG 5
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 844CV
UT WOS:000223135800017
PM 15324126
ER
PT J
AU Vakhnenko, OO
Vakhnenko, VO
Shankland, TJ
Ten Cate, JA
AF Vakhnenko, OO
Vakhnenko, VO
Shankland, TJ
Ten Cate, JA
TI Strain-induced kinetics of intergrain defects as the mechanism of slow
dynamics in the nonlinear resonant response of humid sandstone bars
SO PHYSICAL REVIEW E
LA English
DT Article
ID ROCK
AB A closed-form description is proposed to explain nonlinear and slow dynamics effects exhibited by sandstone bars in longitudinal resonance experiments. Along with the fast subsystem of longitudinal nonlinear displacements we examine the strain-dependent slow subsystem of broken intergrain and interlamina cohesive bonds. We show that even the simplest but phenomenologically correct modeling of their mutual feedback elucidates the main experimental findings typical for forced longitudinal oscillations of sandstone bars, namely, (i) hysteretic behavior of a resonance curve on both its upward and downward slopes, (ii) linear softening of resonant frequency with an increase of driving level, and (iii) gradual recovery (increase) of resonant frequency at low dynamical strain after the sample was conditioned by high strain. In order to reproduce the highly nonlinear elastic features of sandstone grained structure a realistic nonperturbative form of stress-strain relation was adopted. In our theory slow dynamics associated with the experimentally observed memory of peak strain history are attributed to strain-induced kinetic changes in concentration of ruptured intergrain and interlamina cohesive bonds, causing a net hysteretic effect on the elastic Young's modulus. Finally, we explain how enhancement of hysteretic phenomena originates from an increase in equilibrium concentration of ruptured cohesive bonds that are due to water saturation.
C1 Bogolyubov Inst Theoret Phys, UA-03143 Kiev, Ukraine.
Inst Geophys, UA-01054 Kiev, Ukraine.
Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
RP Vakhnenko, OO (reprint author), Bogolyubov Inst Theoret Phys, 14-B Metrologichna St, UA-03143 Kiev, Ukraine.
NR 21
TC 22
Z9 22
U1 1
U2 3
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 JUL
PY 2004
VL 70
IS 1
AR 015602
DI 10.1103/PhysRevE.70.015602
PN 2
PG 4
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 844CV
UT WOS:000223135800012
PM 15324121
ER
PT J
AU Delayen, JR
AF Delayen, JR
TI Cumulative beam breakup in linear accelerators with random displacement
of cavities and focusing elements
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB A formalism presented in a previous paper for the analysis of cumulative beam breakup with arbitrary time dependence of the beam current [J.R. Delayen, Phys. Rev. ST Accel. Beams 6, 084402 ( 2003)] is applied to the problem of beam breakup in the presence of random displacements of cavities and focusing elements. A closed-form solution is obtained and is applied to the behavior of a single bunch and to the steady-state and transient behavior of dc beams and beams composed of pointlike bunches.
C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
RP Delayen, JR (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
EM delayen@jlab.org
NR 11
TC 4
Z9 4
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD JUL
PY 2004
VL 7
IS 7
AR 074402
DI 10.1103/PhysRevSTAB.7.074402
PG 13
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 843JV
UT WOS:000223075800010
ER
PT J
AU Hoffstaetter, GH
Chao, AW
AF Hoffstaetter, GH
Chao, AW
TI Synchrobetatron stop bands due to a single crab cavity
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID BEAM-BEAM INTERACTION
AB We analyze the stop band due to crab cavities for horizontal tunes that are either close to integers or close to half integers. The latter case is relevant for today's electron/positron colliders. We compare this stop band to that created by dispersion in an accelerating cavity and show that a single typical crab cavity creates larger stop bands than a typical dispersion at an accelerating cavity. We furthermore analyze whether it is beneficial to place the crab cavity at a position where the dispersion and its slope vanish. We find that this choice is worth while if the horizontal tune is close to a half integer, but not if it is close to an integer. Furthermore we find that stop bands can be avoided when the horizontal tune is located at a favorable side of the integer or the half integer. While we are here concerned with the installation of a single crab cavity in a storage ring, we show that the stop bands can be weakened, although not eliminated, significantly when two crab cavities per ring are chosen suitably.
C1 Cornell Univ, Dept Phys, Ithaca, NY 14850 USA.
Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
RP Hoffstaetter, GH (reprint author), Cornell Univ, Dept Phys, Ithaca, NY 14850 USA.
NR 9
TC 3
Z9 3
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD JUL
PY 2004
VL 7
IS 7
AR 071002
DI 10.1103/PhysRevSTAB.7.071002
PG 7
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 843JV
UT WOS:000223075800004
ER
PT J
AU Huang, H
Ahrens, L
Bai, M
Brown, KA
Glenn, JW
Luccio, AU
MaKay, WW
Montag, C
Ptitsyn, V
Roser, T
Tsoupas, N
Zeno, K
Ranjbar, V
Spinka, H
Underwood, D
AF Huang, H
Ahrens, L
Bai, M
Brown, KA
Glenn, JW
Luccio, AU
MaKay, WW
Montag, C
Ptitsyn, V
Roser, T
Tsoupas, N
Zeno, K
Ranjbar, V
Spinka, H
Underwood, D
TI Overcoming an intrinsic depolarizing resonance with a partial Siberian
snake
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID SPIN RESONANCES; POLARIZATION; PHYSICS
AB An 11.4% partial Siberian snake was used to successfully accelerate polarized protons through a strong intrinsic depolarizing spin resonance in the Alternating Gradient Synchrotron (AGS). No noticeable depolarization was observed. This opens up the possibility of using a 20% to 30% partial Siberian snake in the AGS or other medium energy proton synchrotrons to overcome all weak and strong depolarizing spin resonances.
C1 Brookhaven Natl Lab, CA Dept, Upton, NY 11973 USA.
Indiana Univ, Dept Phys, Bloomington, IN 47405 USA.
Argonne Natl Lab, Argonne, IL 60439 USA.
RP Huang, H (reprint author), Brookhaven Natl Lab, CA Dept, Upton, NY 11973 USA.
NR 30
TC 2
Z9 2
U1 0
U2 0
PU AMERICAN 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 JUL
PY 2004
VL 7
IS 7
AR 071001
DI 10.1103/PhysRevSTAB.7.071001
PG 6
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 843JV
UT WOS:000223075800003
ER
PT J
AU Huang, Z
Borland, M
Emma, P
Wu, J
Limborg, C
Stupakov, G
Welch, J
AF Huang, Z
Borland, M
Emma, P
Wu, J
Limborg, C
Stupakov, G
Welch, J
TI Suppression of microbunching instability in the linac coherent light
source
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID SIMULATION
AB A microbunching instability driven by longitudinal space charge, coherent synchrotron radiation, and linac wakefields is studied for the linac coherent light source (LCLS) accelerator system. Since the uncorrelated ( local) energy spread of electron beams generated from a photocathode rf gun is very small, the microbunching gain may be large enough to significantly amplify rf-gun generated modulations or even shot-noise fluctuations of the electron beam. The uncorrelated energy spread can be increased by an order of magnitude to provide strong Landau damping against the instability without degrading the free-electron laser performance. We study different damping options in the LCLS and discuss an effective laser heater to minimize the impact of the instability on the quality of the electron beam.
C1 Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
Argonne Natl Lab, Argonne, IL 60439 USA.
RP Huang, Z (reprint author), Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
EM zrh@slac.stanford.edu
NR 19
TC 118
Z9 118
U1 0
U2 10
PU AMERICAN 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 JUL
PY 2004
VL 7
IS 7
AR 074401
DI 10.1103/PhysRevSTAB.7.074401
PG 10
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 843JV
UT WOS:000223075800009
ER
PT J
AU Nantista, C
Tantawi, S
Dolgashev, V
AF Nantista, C
Tantawi, S
Dolgashev, V
TI Low-field accelerator structure couplers and design techniques
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB Recent experience with X-band accelerator structure development has shown the rf input coupler to be the region most prone to rf breakdown and degradation, effectively limiting the operating gradient. A major factor in this appears to be high magnetic fields at the sharp edges of the coupling irises. As a first response to this problem, couplers with rounded and thickened iris horns have been employed and successfully tested at high power. To further reduce fields for higher power flow, conceptually new coupler designs have been developed, in which power is coupled through the broad wall of the feed waveguide, rather than through terminating irises. A "mode-launcher'' coupler, which launches the TM01 mode in circular waveguide before coupling through a matching cell into the main structure, has been tested with great success. With peak surface fields below those in the body of the structure, this coupler represented a breakthrough in the Next Linear Collider structure program. The design of this coupler and of variations which use beam line space more efficiently are described here. The latter include a coupler in which power passes directly through an iris in the broad wall of the rectangular waveguide into a matching cell, also successfully implemented, and a variation which makes the waveguide itself an accelerating cell. We also discuss in some detail a couple of techniques for matching such couplers to traveling-wave structures using a field solver. The first exploits the cell number independence of a traveling-wave match, and the second optimizes using the fields of an internally driven structure.
C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
RP Nantista, C (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
NR 11
TC 22
Z9 21
U1 1
U2 2
PU AMERICAN 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 JUL
PY 2004
VL 7
IS 7
AR 072001
DI 10.1103/PhysRevSTAB.7.072001
PG 7
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 843JV
UT WOS:000223075800005
ER
PT J
AU Stygar, WA
Ives, HC
Wagoner, TC
Lott, JA
Anaya, V
Harjes, HC
Corley, JP
Shoup, RW
Fehl, DL
Mowrer, GR
Wallace, ZR
Anderson, RA
Boyes, JD
Douglas, JW
Horry, ML
Jaramillo, TF
Johnson, DL
Long, FW
Martin, TH
McDaniel, DH
Milton, O
Mostrom, MA
Muirhead, DA
Mulville, TD
Ramirez, JJ
Ramirez, LE
Romero, TM
Seamen, JF
Smith, JW
Speas, CS
Spielman, RB
Struve, KW
Vogtlin, GE
Walsh, DE
Walsh, ED
Walsh, MD
Yamamoto, O
AF Stygar, WA
Ives, HC
Wagoner, TC
Lott, JA
Anaya, V
Harjes, HC
Corley, JP
Shoup, RW
Fehl, DL
Mowrer, GR
Wallace, ZR
Anderson, RA
Boyes, JD
Douglas, JW
Horry, ML
Jaramillo, TF
Johnson, DL
Long, FW
Martin, TH
McDaniel, DH
Milton, O
Mostrom, MA
Muirhead, DA
Mulville, TD
Ramirez, JJ
Ramirez, LE
Romero, TM
Seamen, JF
Smith, JW
Speas, CS
Spielman, RB
Struve, KW
Vogtlin, GE
Walsh, DE
Walsh, ED
Walsh, MD
Yamamoto, O
TI Flashover of a vacuum-insulator interface: A statistical model
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID DC SURFACE FLASHOVER; SOLID INSULATORS; PULSED FLASHOVER; HIGH-VOLTAGE;
MECHANISM; STRESS; GAPS
AB We have developed a statistical model for the flashover of a 45degrees vacuum-insulator interface ( such as would be found in an accelerator) subject to a pulsed electric field. The model assumes that the initiation of a flashover plasma is a stochastic process, that the characteristic statistical component of the flashover delay time is much greater than the plasma formative time, and that the average rate at which flashovers occur is a power-law function of the instantaneous value of the electric field. Under these conditions, we find that the flashover probability is given by 1-exp(-E(p)(beta)t(eff)C/k(beta)), where E-p is the peak value in time of the spatially averaged electric field E(t), t(eff) equivalent to integral[E(t)/E-p](beta)dt is the effective pulse width, C is the insulator circumference, k proportional to exp(lambda/d), and beta and lambda are constants. We define E(t) as V(t)/d, where V(t) is the voltage across the insulator and d is the insulator thickness. Since the model assumes that flashovers occur at random azimuthal locations along the insulator, it does not apply to systems that have a significant defect, i.e., a location contaminated with debris or compromised by an imperfection at which flashovers repeatedly take place, and which prevents a random spatial distribution. The model is consistent with flashover measurements to within 7% for pulse widths between 0.5 ns and 10 mus, and to within a factor of 2 between 0.5 ns and 90 s ( a span of over 11 orders of magnitude). For these measurements, E-p ranges from 64 to 651 kV/cm, d from 0.50 to 4.32 cm, and C from 4.96 to 95.74 cm. The model is significantly more accurate, and is valid over a wider range of parameters, than the J.C. Martin flashover relation that has been in use since 1971 [J.C. Martin on Pulsed Power, edited by T. H. Martin, A. H. Guenther, and M. Kristiansen ( Plenum, New York, 1996)]. We have generalized the statistical model to estimate the total-flashover probability of an insulator stack (i.e., an assembly of insulator-electrode systems connected in series). The expression obtained is consistent with the measured flashover performance of a stack of five 5.72-cm-thick, 1003-cm- circumference insulators operated at 100 and 158 kV/cm. The expression predicts that the total-flashover probability is a strong function of the ratio E-p/k, and that under certain conditions, the performance improves as the capacitance between the stack grading rings is increased. In addition, the expression suggests that given a fixed stack height, there exists an optimum number of insulator rings that maximizes the voltage at which the stack can be operated. The results presented can be applied to any system ( or any set of systems connected in series) subject to random failures, when the characteristic statistical delay time of a failure is much greater than its formative time.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
EG&G, Albuquerque, NM 87107 USA.
Ktech Corp Inc, Albuquerque, NM 87123 USA.
Titan Pulsed Sci Div, San Leandro, CA 94577 USA.
Mission Res Corp, Albuquerque, NM 87110 USA.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
C Lec Plast, Philadelphia, PA 19135 USA.
Kyoto Univ, Kyoto, Japan.
RP Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 85
TC 19
Z9 25
U1 1
U2 11
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 JUL
PY 2004
VL 7
IS 7
AR 070401
DI 10.1103/PhysRevSTA.B.7.070401
PG 21
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 843JV
UT WOS:000223075800001
ER
PT J
AU Shen, G
Sturhahn, W
Alp, EE
Zhao, J
Toellner, TS
Prakapenka, VB
Meng, Y
Mao, HR
AF Shen, G
Sturhahn, W
Alp, EE
Zhao, J
Toellner, TS
Prakapenka, VB
Meng, Y
Mao, HR
TI Phonon density of states in iron at high pressures and high temperatures
SO PHYSICS AND CHEMISTRY OF MINERALS
LA English
DT Article
DE phonon density of states; nuclear resonance inelastic X-ray scattering;
diamond anvil cell; iron
ID NUCLEAR RESONANT SCATTERING; DIAMOND-ANVIL CELL; SYNCHROTRON-RADIATION;
SOUND VELOCITIES; GIGAPASCALS; DISPERSION; SYSTEM; GPA; FE
AB The phonon density of states (DOS) in iron has been measured in situ by nuclear resonance inelastic X-ray scattering (NRIXS) at high pressures and high temperatures in a resistively heated diamond anvil cell. The DOS data provide a variety of thermodynamic and elastic parameters essential for characterizing iron at depth in the Earth interior, such as average sound velocity, Debye temperature, atomic mean square displacement, average kinetic energy, vibrational entropy and specific heat. The NRIXS data were collected at 6, 20, and 29 GPa and at temperatures up to 920 K. Temperatures were directly determined from the measured spectra by the ratio of intensities of the phonon creation/annihilation side bands that are determined only by the Boltzmann factor. The change of the DOS caused by the structural transition from alpha-Fe to epsilon-Fe is small and not resolvable within the experimental precision. However, the phonon energies in gamma-Fe are clearly shifted to lower values with respect to alpha- and epsilon-Fe. The temperature dependence of derived thermodynamic parameters is presented and compared with those obtained by Debye's model. The Debye temperatures that best describe the data decrease slightly with increasing temperature.
C1 Univ Chicago, Ctr Adv Radiat Sources, Chicago, IL 60637 USA.
Argonne Natl Lab, Adv Photon Source, HPCAT, Argonne, IL 60439 USA.
Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA.
RP Shen, G (reprint author), Univ Chicago, Ctr Adv Radiat Sources, Chicago, IL 60637 USA.
EM shen@cars.uchicago.edu
NR 33
TC 27
Z9 27
U1 1
U2 9
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 0342-1791
J9 PHYS CHEM MINER
JI Phys. Chem. Miner.
PD JUL
PY 2004
VL 31
IS 6
BP 353
EP 359
DI 10.1007/s00269-004-0403-1
PG 7
WC Materials Science, Multidisciplinary; Mineralogy
SC Materials Science; Mineralogy
GA 841FK
UT WOS:000222914500004
ER
PT J
AU Gaft, M
Nagli, L
Waychunas, G
Weiss, D
AF Gaft, M
Nagli, L
Waychunas, G
Weiss, D
TI The nature of blue luminescence from natural benitoite BaTiSi3O9
SO PHYSICS AND CHEMISTRY OF MINERALS
LA English
DT Article
DE benitoite; blue luminescence; TiO6 centers
ID SPECTROSCOPY
AB It is proved that blue luminescence from benitoite is connected with intrinsic luminescence centers, namely isolated TiO6 octahedra. The metastable level T-3(1u) is the emitting level at low temperatures with a long decay time of 1.1 ms. At higher temperatures an energy level with higher radiation probability must be involved in the emission process, and this level is situated at 0.06 eV higher than the lowest level. These two levels may be connected with T-3(1u) level splitting or with closely spaced T-3(1u) and T-3(2u) levels. Decay time shortening and thermal quenching are connected with nonradiative decay within the TiO6 luminescence center, while energy migration does not take place at least up to room temperature.
C1 Int Technol Lasers, Rishon Le Zion, Israel.
Open University, Tel Aviv, Israel.
Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Gaft, M (reprint author), Int Technol Lasers, Hachoma 12, Rishon Le Zion, Israel.
EM michael_g@itlasers.com
NR 17
TC 25
Z9 26
U1 5
U2 22
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 0342-1791
J9 PHYS CHEM MINER
JI Phys. Chem. Miner.
PD JUL
PY 2004
VL 31
IS 6
BP 365
EP 373
DI 10.1007/s00269-004-0407-x
PG 9
WC Materials Science, Multidisciplinary; Mineralogy
SC Materials Science; Mineralogy
GA 841FK
UT WOS:000222914500006
ER
PT J
AU Chekanov, S
Derrick, M
Loizides, JH
Magill, S
Miglioranzi, S
Musgrave, B
Repond, J
Yoshida, R
Mattingly, MCK
Pavel, N
Antonioli, P
Bari, G
Basile, M
Bellagamba, L
Boscherini, D
Bruni, A
Bruni, G
Romeo, GC
Cifarelli, L
Cindolo, F
Contin, A
Corradi, M
De Pasquale, S
Giusti, P
Iacobucci, G
Margotti, A
Montanari, A
Nania, R
Palmonari, F
Pesci, A
Rinaldi, L
Sartorelli, G
Zichichi, A
Aghuzumtsyan, G
Bartsch, D
Brock, I
Goers, S
Hartmann, H
Hilger, E
Irrgang, P
Jakob, HP
Kind, O
Meyer, U
Paul, E
Rautenberg, J
Renner, R
Stifutkin, A
Tandler, J
Voss, KC
Wang, M
Bailey, DS
Brook, NH
Cole, JE
Heath, GP
Namsoo, T
Robins, S
Wing, M
Capua, M
Mastroberardino, A
Schioppa, M
Susinno, G
Kim, JY
Lim, IT
Ma, KJ
Pac, MY
Helbich, M
Ning, Y
Ren, Z
Schmidke, WB
Sciulli, F
Chwastowski, J
Eskreys, A
Figiel, J
Galas, A
Olkiewicz, K
Stopa, P
Zawiejski, L
Adamczyk, L
Bold, T
Grabowska-Bold, I
Kisielewska, D
Kowal, AM
Kowal, M
Lukasik, J
Przybycien, M
Suszycki, L
Szuba, D
Szuba, J
Kotanski, A
Slominski, W
Adler, V
Behrens, U
Bloch, I
Borras, K
Chiochia, V
Dannheim, D
Drews, G
Fourletova, J
Fricke, U
Geiser, A
Gottlicher, P
Gutsche, O
Haas, T
Hain, W
Hillert, S
Horn, C
Kahle, B
Kotz, U
Kowalski, H
Kramberger, G
Labes, H
Lelas, D
Lim, H
Lohr, B
Mankel, R
Melzer-Pellmann, IA
Nguyen, CN
Notz, D
Nuncio-Quiroz, AE
Polini, A
Raval, A
Rurua, L
Schneekloth, U
Stosslein, U
Wolf, G
Youngman, C
Zeuner, W
Schlenstedt, S
Barbagli, G
Gallo, E
Genta, C
Pelfer, R
Bamberger, A
Benen, A
Karstens, F
Dobur, D
Vlasov, NN
Bell, M
Bussey, PJ
Doyle, AT
Ferrando, J
Hamilton, J
Hanlon, S
Saxon, DH
Skillicorn, IO
Gialas, I
Carli, T
Gosau, T
Holm, U
Krumnack, N
Lohrmann, E
Milite, M
Salehi, H
Schleper, P
Schorner-Sadenius, T
Stonjek, S
Wichmann, K
Wick, K
Ziegler, A
Ziegler, A
Collins-Tooth, C
Foudas, C
Goncalo, R
Long, KR
Tapper, AD
Cloth, P
Filges, D
Kataoka, M
Nagano, K
Tokushuku, K
Yamada, S
Yamazaki, Y
Barakbaev, AN
Boos, EG
Pokrovskiy, NS
Zhautykov, BO
Son, D
Piotrzkowski, K
Barreiro, F
Glasman, C
Gonzalez, O
Labarga, L
del Peso, J
Tassi, E
Terron, J
Zambrana, M
Barbi, M
Corriveau, F
Gliga, S
Lainesse, J
Padhi, S
Stairs, DG
Walsh, R
Tsurugai, T
Antonov, A
Danilov, P
Dolgoshein, BA
Gladkov, D
Sosnovtsev, V
Suchkov, S
Dementiev, RK
Ermolov, PF
Katkov, II
Khein, LA
Korzhavina, IA
Kuzmin, VA
Levchenko, BB
Lukina, OY
Proskuryakov, AS
Shcheglova, LM
Zotkin, SA
Abt, I
Buttner, C
Caldwell, A
Liu, X
Sutiak, J
Coppola, N
Grijpink, S
Koffeman, E
Kooijman, P
Maddox, E
Pellegrino, A
Schagen, S
Tiecke, H
Vazquez, M
Wiggers, L
de Wolf, E
Brummer, N
Bylsma, B
Durkin, LS
Ling, TY
Cooper-Sarkar, AM
Cottrell, A
Devenish, RCE
Foster, B
Grzelak, G
Gwenlan, C
Kohno, T
Patel, S
Straub, PB
Walczak, R
Bertolin, A
Brugnera, R
Carlin, R
Dal Corso, F
Dusini, S
Garfagnini, A
Limentani, S
Longhin, A
Parenti, A
Posocco, M
Stanco, L
Turcato, M
Heaphy, EA
Metlica, E
Oh, BY
Whitmore, JJ
Iga, Y
D'Agostini, G
Marini, G
Nigro, A
Cormack, C
Hart, JC
McCubbin, NA
Heusch, C
Park, IH
Abramowicz, H
Gabareen, A
Kananov, S
Kreisel, A
Levy, A
Kuze, M
Fusayasu, T
Kagawa, S
Tawara, T
Yamashita, T
Hamatsu, R
Hirose, T
Inuzuka, M
Kaji, H
Kitamura, S
Matsuzawa, K
Costa, M
Ferrero, MI
Monaco, V
Sacchi, R
Solano, A
Arneodo, M
Ruspa, M
Koop, T
Martin, JF
Mirea, A
Butterworth, JM
Hall-Wilton, R
Jones, TW
Lightwood, MS
Sutton, MR
Targett-Adams, C
Ciborowski, J
Ciesielski, R
Luzniak, P
Nowak, RJ
Pawlak, JM
Sztuk, J
Tymieniecka, T
Ukleja, A
Ukleja, J
Zarnecki, AF
Adamus, M
Plucinski, P
Eisenberg, Y
Hochman, D
Karshon, U
Riveline, M
Everett, A
Gladilin, LK
Kcira, D
Lammers, S
Li, L
Reeder, DD
Rosin, M
Ryan, P
Savin, AA
Smith, WH
Dhawan, S
Bhadra, S
Catterall, CD
Fourletov, S
Hartner, G
Menary, S
Soares, M
Standage, J
AF Chekanov, S
Derrick, M
Loizides, JH
Magill, S
Miglioranzi, S
Musgrave, B
Repond, J
Yoshida, R
Mattingly, MCK
Pavel, N
Antonioli, P
Bari, G
Basile, M
Bellagamba, L
Boscherini, D
Bruni, A
Bruni, G
Romeo, GC
Cifarelli, L
Cindolo, F
Contin, A
Corradi, M
De Pasquale, S
Giusti, P
Iacobucci, G
Margotti, A
Montanari, A
Nania, R
Palmonari, F
Pesci, A
Rinaldi, L
Sartorelli, G
Zichichi, A
Aghuzumtsyan, G
Bartsch, D
Brock, I
Goers, S
Hartmann, H
Hilger, E
Irrgang, P
Jakob, HP
Kind, O
Meyer, U
Paul, E
Rautenberg, J
Renner, R
Stifutkin, A
Tandler, J
Voss, KC
Wang, M
Bailey, DS
Brook, NH
Cole, JE
Heath, GP
Namsoo, T
Robins, S
Wing, M
Capua, M
Mastroberardino, A
Schioppa, M
Susinno, G
Kim, JY
Lim, IT
Ma, KJ
Pac, MY
Helbich, M
Ning, Y
Ren, Z
Schmidke, WB
Sciulli, F
Chwastowski, J
Eskreys, A
Figiel, J
Galas, A
Olkiewicz, K
Stopa, P
Zawiejski, L
Adamczyk, L
Bold, T
Grabowska-Bold, I
Kisielewska, D
Kowal, AM
Kowal, M
Lukasik, J
Przybycien, M
Suszycki, L
Szuba, D
Szuba, J
Kotanski, A
Slominski, W
Adler, V
Behrens, U
Bloch, I
Borras, K
Chiochia, V
Dannheim, D
Drews, G
Fourletova, J
Fricke, U
Geiser, A
Gottlicher, P
Gutsche, O
Haas, T
Hain, W
Hillert, S
Horn, C
Kahle, B
Kotz, U
Kowalski, H
Kramberger, G
Labes, H
Lelas, D
Lim, H
Lohr, B
Mankel, R
Melzer-Pellmann, IA
Nguyen, CN
Notz, D
Nuncio-Quiroz, AE
Polini, A
Raval, A
Rurua, L
Schneekloth, U
Stosslein, U
Wolf, G
Youngman, C
Zeuner, W
Schlenstedt, S
Barbagli, G
Gallo, E
Genta, C
Pelfer, R
Bamberger, A
Benen, A
Karstens, F
Dobur, D
Vlasov, NN
Bell, M
Bussey, PJ
Doyle, AT
Ferrando, J
Hamilton, J
Hanlon, S
Saxon, DH
Skillicorn, IO
Gialas, I
Carli, T
Gosau, T
Holm, U
Krumnack, N
Lohrmann, E
Milite, M
Salehi, H
Schleper, P
Schorner-Sadenius, T
Stonjek, S
Wichmann, K
Wick, K
Ziegler, A
Ziegler, A
Collins-Tooth, C
Foudas, C
Goncalo, R
Long, KR
Tapper, AD
Cloth, P
Filges, D
Kataoka, M
Nagano, K
Tokushuku, K
Yamada, S
Yamazaki, Y
Barakbaev, AN
Boos, EG
Pokrovskiy, NS
Zhautykov, BO
Son, D
Piotrzkowski, K
Barreiro, F
Glasman, C
Gonzalez, O
Labarga, L
del Peso, J
Tassi, E
Terron, J
Zambrana, M
Barbi, M
Corriveau, F
Gliga, S
Lainesse, J
Padhi, S
Stairs, DG
Walsh, R
Tsurugai, T
Antonov, A
Danilov, P
Dolgoshein, BA
Gladkov, D
Sosnovtsev, V
Suchkov, S
Dementiev, RK
Ermolov, PF
Katkov, II
Khein, LA
Korzhavina, IA
Kuzmin, VA
Levchenko, BB
Lukina, OY
Proskuryakov, AS
Shcheglova, LM
Zotkin, SA
Abt, I
Buttner, C
Caldwell, A
Liu, X
Sutiak, J
Coppola, N
Grijpink, S
Koffeman, E
Kooijman, P
Maddox, E
Pellegrino, A
Schagen, S
Tiecke, H
Vazquez, M
Wiggers, L
de Wolf, E
Brummer, N
Bylsma, B
Durkin, LS
Ling, TY
Cooper-Sarkar, AM
Cottrell, A
Devenish, RCE
Foster, B
Grzelak, G
Gwenlan, C
Kohno, T
Patel, S
Straub, PB
Walczak, R
Bertolin, A
Brugnera, R
Carlin, R
Dal Corso, F
Dusini, S
Garfagnini, A
Limentani, S
Longhin, A
Parenti, A
Posocco, M
Stanco, L
Turcato, M
Heaphy, EA
Metlica, E
Oh, BY
Whitmore, JJ
Iga, Y
D'Agostini, G
Marini, G
Nigro, A
Cormack, C
Hart, JC
McCubbin, NA
Heusch, C
Park, IH
Abramowicz, H
Gabareen, A
Kananov, S
Kreisel, A
Levy, A
Kuze, M
Fusayasu, T
Kagawa, S
Tawara, T
Yamashita, T
Hamatsu, R
Hirose, T
Inuzuka, M
Kaji, H
Kitamura, S
Matsuzawa, K
Costa, M
Ferrero, MI
Monaco, V
Sacchi, R
Solano, A
Arneodo, M
Ruspa, M
Koop, T
Martin, JF
Mirea, A
Butterworth, JM
Hall-Wilton, R
Jones, TW
Lightwood, MS
Sutton, MR
Targett-Adams, C
Ciborowski, J
Ciesielski, R
Luzniak, P
Nowak, RJ
Pawlak, JM
Sztuk, J
Tymieniecka, T
Ukleja, A
Ukleja, J
Zarnecki, AF
Adamus, M
Plucinski, P
Eisenberg, Y
Hochman, D
Karshon, U
Riveline, M
Everett, A
Gladilin, LK
Kcira, D
Lammers, S
Li, L
Reeder, DD
Rosin, M
Ryan, P
Savin, AA
Smith, WH
Dhawan, S
Bhadra, S
Catterall, CD
Fourletov, S
Hartner, G
Menary, S
Soares, M
Standage, J
CA ZEUS Collaboration
TI Evidence for a narrow baryonic state decaying to K(S)(0)p and
K-S(0)(p)over-bar in deep inelastic scattering at HERA
SO PHYSICS LETTERS B
LA English
DT Article
ID CENTRAL TRACKING DETECTOR; ZEUS BARREL CALORIMETER;
POSITIVE-STRANGENESS; REAR CALORIMETER; PHOTOPRODUCTION; CONSTRUCTION;
DESIGN; PENTAQUARK; ENERGY; MASS
AB A resonance search has been made in the K(S)(0)p and K-S(0)(p) over bar invariant-mass spectrum measured with the ZEUS detector at HERA using an integrated luminosity of 121 pb(-1). The search was performed in the central rapidity region of inclusive deep inelastic scattering at an ep centre-of-mass energy of 300-318 GeV for exchanged photon virtuality, Q(2), above 1 GeV2. Recent results from fixed-target experiments give evidence for a narrow baryon resonance decaying to K(+)n and K(S)(0)p, interpreted as a pentaquark. The results presented here support the existence of such state, with a mass of 1521.5 +/- 1.5(stat.)(-1.7)(+2.8)(syst.) MeV and a Gaussian width consistent with the experimental resolution of 2 MeV The signal is visible at high Q(2) and, for Q(2) > 20 GeV2, contains 221 +/- 48 events. The probability of a similar signal anywhere in the range 1500-1560 MeV arising from fluctuations of the background is below 6 x 10(-5). (C) 2004 Elsevier B.V. All rights reserved.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
Andrews Univ, Berrien Springs, MI 49104 USA.
Humboldt Univ, Inst Phys, Berlin, Germany.
Univ Bologna, Bologna, Italy.
Ist Nazl Fis Nucl, I-40126 Bologna, Italy.
Univ Bonn, Inst Phys, D-5300 Bonn, Germany.
Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England.
Univ Calabria, Dept Phys, I-87030 Commenda Di Rende, Italy.
Ist Nazl Fis Nucl, Cosenza, Italy.
Chonnam Natl Univ, Kwangju, South Korea.
Columbia Univ, Nevis Labs, New York, NY 10027 USA.
Inst Nucl Phys, Krakow, Poland.
Univ Sci & Technol, AGH, Fac Phys & Nucl Techniques, Krakow, Poland.
Jagiellonian Univ, Dept Phys, Krakow, Poland.
DESY, D-2000 Hamburg, Germany.
DESY, Zeuthen, Germany.
Univ Florence, Florence, Italy.
Ist Nazl Fis Nucl, I-50125 Florence, Italy.
Univ Freiburg, Fak Phys, D-7800 Freiburg, Germany.
Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland.
Univ Aegean, Dept Engn Management & Finance, Mitilini, Greece.
Univ Hamburg, Inst Expt Phys, Hamburg, Germany.
Univ London Imperial Coll Sci Technol & Med, High Energy Nucl Phys Grp, London, England.
Forschungszentrum Julich, Inst Kernphys, D-5170 Julich, Germany.
Kek Nat Lab High Energy Phys, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 305, Japan.
Minist Educ & Sci Kazakhstan, Inst Phys & Technol, Alma Ata, Kazakhstan.
Kyungpook Natl Univ, Ctr High Energy Phys, Taegu, South Korea.
Catholic Univ Louvain, Inst Phys Nucl, B-1348 Louvain, Belgium.
Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain.
McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
Meiji Gakuin Univ, Fac Gen Educ, Yokohama, Kanagawa, Japan.
Moscow Engn Phys Inst, Moscow 115409, Russia.
Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow, Russia.
Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
Univ Amsterdam, Amsterdam, Netherlands.
NIKHEF H, NL-1009 DB Amsterdam, Netherlands.
Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
Univ Oxford, Dept Phys, Oxford, England.
Ist Nazl Fis Nucl, Padua, Italy.
Univ Padua, Dipartimento Fis, Padua, Italy.
Penn State Univ, Dept Phys, University Pk, PA 16802 USA.
Polytech Univ, Sagamihara, Kanagawa, Japan.
Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
Ist Nazl Fis Nucl, Rome, Italy.
Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA.
Ewha Womans Univ, Dept Phys, Seoul, South Korea.
Tel Aviv Univ, Sch Phys, Raymond & Beverly Sackler Fac Exact Sci, IL-69978 Tel Aviv, Israel.
Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan.
Univ Tokyo, Dept Phys, Tokyo 113, Japan.
Tokyo Metropolitan Univ, Dept Phys, Tokyo, Japan.
Ist Nazl Fis Nucl, I-10125 Turin, Italy.
Univ Piemonte Orientale, Novara, Italy.
Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada.
UCL, Dept Phys & Astron, London, England.
Warsaw Univ, Inst Expt Phys, Warsaw, Poland.
Inst Nucl Studies, PL-00681 Warsaw, Poland.
Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel.
Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
Yale Univ, Dept Phys, New Haven, CT 06520 USA.
York Univ, Dept Phys, N York, ON M3J 1P3, Canada.
UCL, London, England.
Univ Hamburg, Hamburg, Germany.
Univ Lodz, PL-90131 Lodz, Poland.
RP Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM rik.yoshida@desy.de
RI Suchkov, Sergey/M-6671-2015; dusini, stefano/J-3686-2012; Goncalo,
Ricardo/M-3153-2016; Li, Liang/O-1107-2015; De Pasquale,
Salvatore/B-9165-2008; Wing, Matthew/C-2169-2008; Doyle,
Anthony/C-5889-2009; collins-tooth, christopher/A-9201-2012; Ferrando,
James/A-9192-2012; Levchenko, B./D-9752-2012; Proskuryakov,
Alexander/J-6166-2012; Dementiev, Roman/K-7201-2012; Wiggers,
Leo/B-5218-2015; Gliga, Sebastian/K-4019-2015; Tassi,
Enrico/K-3958-2015; Gladilin, Leonid/B-5226-2011
OI dusini, stefano/0000-0002-1128-0664; Goncalo,
Ricardo/0000-0002-3826-3442; Li, Liang/0000-0001-6411-6107; De Pasquale,
Salvatore/0000-0001-9236-0748; Doyle, Anthony/0000-0001-6322-6195;
Ferrando, James/0000-0002-1007-7816; Wiggers, Leo/0000-0003-1060-0520;
Gliga, Sebastian/0000-0003-1729-1070; Gladilin,
Leonid/0000-0001-9422-8636
NR 42
TC 229
Z9 233
U1 1
U2 14
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 1
PY 2004
VL 591
IS 1-2
BP 7
EP 22
DI 10.1016/j.physletb.2004.04.024
PG 16
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 830MQ
UT WOS:000222126700002
ER
PT J
AU Chekanov, S
Derrick, M
Krakauer, D
Loizides, JH
Magill, S
Miglioranzi, S
Musgrave, B
Repond, J
Yoshida, R
Mattingly, MCK
Antonioli, P
Bari, G
Basile, M
Bellagamba, L
Boscherini, D
Bruni, A
Bruni, G
Romeo, GC
Cifarelli, L
Cindolo, F
Contin, A
Corradi, A
De Pasquale, S
Giusti, P
Iacobucci, G
Margotti, A
Montanari, A
Nania, R
Palmonari, F
Pesci, A
Sartorelli, G
Zichichi, A
Aghuzumtsyan, G
Bartsch, D
Brock, I
Goers, S
Hartmann, H
Hilger, E
Irrgang, P
Jakob, HP
Kind, O
Meyer, U
Paul, E
Rautenberg, J
Renner, R
Stifutkin, A
Tandler, J
Voss, KC
Wang, M
Weber, A
Bailey, DS
Brook, NH
Cole, JE
Heath, GP
Namsoo, T
Robins, S
Wing, M
Capua, M
Mastroberardino, A
Schioppa, M
Susinno, G
Kim, JY
Kim, YK
Lee, JH
Lim, IT
Pac, MY
Caldwell, A
Helbich, M
Liu, X
Mellado, B
Ning, Y
Paganis, S
Ren, Z
Schmidke, WB
Sciulli, F
Chwastowski, J
Eskreys, A
Figiel, J
Galas, A
Olkiewicz, K
Stopa, P
Zawiejski, L
Adamczyk, L
Bold, T
Grabowska-Bold, I
Kisielewska, D
Kowal, AM
Kowal, M
Kowalski, T
Przybycien, M
Suszycki, L
Szuba, D
Szuba, J
Kotanski, A
Slominski, W
Adler, V
Behrens, U
Bloch, I
Borras, K
Chiochia, V
Dannheim, D
Drews, G
Fourletova, J
Fricke, U
Geiser, A
Gottlicher, P
Gutsche, O
Haas, T
Hain, W
Hillert, S
Kahle, B
Kotz, U
Kowalski, H
Kramberger, G
Labes, H
Lelas, D
Lim, H
Lohr, B
Mankel, R
Melzer-Pellmann, IA
Nguyen, CN
Notz, D
Nuncio-Quiroz, AE
Polini, A
Raval, A
Rurua, L
Schneekloth, U
Stosslein, U
Wichmann, R
Wolf, G
Youngman, C
Zeuner, W
Schlenstedt, S
Barbagli, G
Gallo, E
Genta, C
Pelfer, PG
Bamberger, A
Benen, A
Karstens, F
Dobur, D
Vlasov, NN
Bell, M
Bussey, PJ
Doyle, AT
Ferrando, J
Hamilton, J
Hanlon, S
Saxon, DH
Skillicorn, IO
Gialas, I
Carli, T
Gosau, T
Holm, U
Krumnack, N
Lohrmann, E
Milite, M
Salehi, H
Schleper, P
Stonjek, S
Wichmann, K
Wick, K
Ziegler, A
Ziegler, A
Collins-Tooth, C
Foudas, C
Goncalo, R
Long, KR
Tapper, AD
Cloth, P
Filges, D
Kataoka, M
Nagano, K
Tokushuku, K
Yamada, S
Yamazaki, Y
Barakbaev, AN
Boos, EG
Pokrovskiy, NS
Zhautykov, BO
Son, D
Piotrzkowski, K
Barreiro, F
Glasman, C
Gonzalez, O
Labarga, L
del Peso, J
Tassi, E
Terron, J
Vazquez, M
Zambrana, M
Barbi, M
Corriveau, F
Gliga, S
Lainesse, J
Padhi, S
Stairs, DG
Walsh, R
Tsurugai, T
Antonov, A
Danilov, P
Dolgoshein, BA
Gladkov, D
Sosnovtsev, V
Suchkov, S
Dementiev, RK
Ermolov, PF
Golubkov, YA
Katkov, II
Khein, LA
Korzhavina, IA
Kuzmin, VA
Levchenko, BB
Lukina, OY
Proskuryakov, AS
Shcheglova, LM
Zotkin, SA
Coppola, N
Grijpink, S
Koffeman, E
Kooijman, P
Maddox, E
Pellegrino, A
Schagen, S
Tiecke, H
Velthuis, JJ
Wiggers, L
de Wolf, E
Brummer, N
Bylsma, B
Durkin, LS
Ling, TY
Cooper-Sarkar, AM
Cottrell, A
Devenish, RCE
Foster, B
Grzelak, G
Gwenlan, C
Patel, S
Straub, PB
Walczak, R
Bertolin, A
Brugnera, R
Carlin, R
Dal Corso, F
Dusini, S
Garfagnini, A
Limentani, S
Longhin, A
Parenti, A
Posocco, M
Stanco, L
Turcato, M
Heaphy, EA
Metlica, F
Oh, BY
Whitmore, JJ
Iga, Y
D'Agostini, G
Marini, G
Nigro, A
Cormack, C
Hart, JC
McCubbin, NA
Heusch, C
Park, IH
Pavel, N
Abramowicz, H
Gabareen, A
Kananov, S
Kreisel, A
Levy, A
Kuze, M
Fusayasu, T
Kagawa, S
Kohno, T
Tawara, T
Yamashita, T
Hamatsu, R
Hirose, T
Inuzuka, M
Kaji, H
Kitamura, S
Matsuzawa, K
Ferrero, MI
Monaco, V
Sacchi, R
Solano, A
Arneodo, M
Ruspa, M
Koop, T
Martin, JF
Mirea, A
Butterworth, JM
Hall-Wilton, R
Jones, TW
Lightwood, MS
Sutton, MR
Targett-Adams, C
Ciborowski, J
Ciesielski, R
Luzniak, P
Nowak, RJ
Pawlak, JM
Sztuk, J
Tymieniecka, T
Ukleja, A
Ukleja, J
Zarnecki, AF
Adamus, M
Plucinski, P
Eisenberg, Y
Gladilin, LK
Hochman, D
Karshon, U
Riveline, M
Kcira, D
Lammers, S
Li, L
Reeder, DD
Rosin, M
Savin, AA
Smith, WH
Deshpande, A
Dhawan, S
Bhadra, S
Catterall, CD
Fourletov, S
Hartner, G
Menary, S
Soares, M
Standage, J
AF Chekanov, S
Derrick, M
Krakauer, D
Loizides, JH
Magill, S
Miglioranzi, S
Musgrave, B
Repond, J
Yoshida, R
Mattingly, MCK
Antonioli, P
Bari, G
Basile, M
Bellagamba, L
Boscherini, D
Bruni, A
Bruni, G
Romeo, GC
Cifarelli, L
Cindolo, F
Contin, A
Corradi, A
De Pasquale, S
Giusti, P
Iacobucci, G
Margotti, A
Montanari, A
Nania, R
Palmonari, F
Pesci, A
Sartorelli, G
Zichichi, A
Aghuzumtsyan, G
Bartsch, D
Brock, I
Goers, S
Hartmann, H
Hilger, E
Irrgang, P
Jakob, HP
Kind, O
Meyer, U
Paul, E
Rautenberg, J
Renner, R
Stifutkin, A
Tandler, J
Voss, KC
Wang, M
Weber, A
Bailey, DS
Brook, NH
Cole, JE
Heath, GP
Namsoo, T
Robins, S
Wing, M
Capua, M
Mastroberardino, A
Schioppa, M
Susinno, G
Kim, JY
Kim, YK
Lee, JH
Lim, IT
Pac, MY
Caldwell, A
Helbich, M
Liu, X
Mellado, B
Ning, Y
Paganis, S
Ren, Z
Schmidke, WB
Sciulli, F
Chwastowski, J
Eskreys, A
Figiel, J
Galas, A
Olkiewicz, K
Stopa, P
Zawiejski, L
Adamczyk, L
Bold, T
Grabowska-Bold, I
Kisielewska, D
Kowal, AM
Kowal, M
Kowalski, T
Przybycien, M
Suszycki, L
Szuba, D
Szuba, J
Kotanski, A
Slominski, W
Adler, V
Behrens, U
Bloch, I
Borras, K
Chiochia, V
Dannheim, D
Drews, G
Fourletova, J
Fricke, U
Geiser, A
Gottlicher, P
Gutsche, O
Haas, T
Hain, W
Hillert, S
Kahle, B
Kotz, U
Kowalski, H
Kramberger, G
Labes, H
Lelas, D
Lim, H
Lohr, B
Mankel, R
Melzer-Pellmann, IA
Nguyen, CN
Notz, D
Nuncio-Quiroz, AE
Polini, A
Raval, A
Rurua, L
Schneekloth, U
Stosslein, U
Wichmann, R
Wolf, G
Youngman, C
Zeuner, W
Schlenstedt, S
Barbagli, G
Gallo, E
Genta, C
Pelfer, PG
Bamberger, A
Benen, A
Karstens, F
Dobur, D
Vlasov, NN
Bell, M
Bussey, PJ
Doyle, AT
Ferrando, J
Hamilton, J
Hanlon, S
Saxon, DH
Skillicorn, IO
Gialas, I
Carli, T
Gosau, T
Holm, U
Krumnack, N
Lohrmann, E
Milite, M
Salehi, H
Schleper, P
Stonjek, S
Wichmann, K
Wick, K
Ziegler, A
Ziegler, A
Collins-Tooth, C
Foudas, C
Goncalo, R
Long, KR
Tapper, AD
Cloth, P
Filges, D
Kataoka, M
Nagano, K
Tokushuku, K
Yamada, S
Yamazaki, Y
Barakbaev, AN
Boos, EG
Pokrovskiy, NS
Zhautykov, BO
Son, D
Piotrzkowski, K
Barreiro, F
Glasman, C
Gonzalez, O
Labarga, L
del Peso, J
Tassi, E
Terron, J
Vazquez, M
Zambrana, M
Barbi, M
Corriveau, F
Gliga, S
Lainesse, J
Padhi, S
Stairs, DG
Walsh, R
Tsurugai, T
Antonov, A
Danilov, P
Dolgoshein, BA
Gladkov, D
Sosnovtsev, V
Suchkov, S
Dementiev, RK
Ermolov, PF
Golubkov, YA
Katkov, II
Khein, LA
Korzhavina, IA
Kuzmin, VA
Levchenko, BB
Lukina, OY
Proskuryakov, AS
Shcheglova, LM
Zotkin, SA
Coppola, N
Grijpink, S
Koffeman, E
Kooijman, P
Maddox, E
Pellegrino, A
Schagen, S
Tiecke, H
Velthuis, JJ
Wiggers, L
de Wolf, E
Brummer, N
Bylsma, B
Durkin, LS
Ling, TY
Cooper-Sarkar, AM
Cottrell, A
Devenish, RCE
Foster, B
Grzelak, G
Gwenlan, C
Patel, S
Straub, PB
Walczak, R
Bertolin, A
Brugnera, R
Carlin, R
Dal Corso, F
Dusini, S
Garfagnini, A
Limentani, S
Longhin, A
Parenti, A
Posocco, M
Stanco, L
Turcato, M
Heaphy, EA
Metlica, F
Oh, BY
Whitmore, JJ
Iga, Y
D'Agostini, G
Marini, G
Nigro, A
Cormack, C
Hart, JC
McCubbin, NA
Heusch, C
Park, IH
Pavel, N
Abramowicz, H
Gabareen, A
Kananov, S
Kreisel, A
Levy, A
Kuze, M
Fusayasu, T
Kagawa, S
Kohno, T
Tawara, T
Yamashita, T
Hamatsu, R
Hirose, T
Inuzuka, M
Kaji, H
Kitamura, S
Matsuzawa, K
Ferrero, MI
Monaco, V
Sacchi, R
Solano, A
Arneodo, M
Ruspa, M
Koop, T
Martin, JF
Mirea, A
Butterworth, JM
Hall-Wilton, R
Jones, TW
Lightwood, MS
Sutton, MR
Targett-Adams, C
Ciborowski, J
Ciesielski, R
Luzniak, P
Nowak, RJ
Pawlak, JM
Sztuk, J
Tymieniecka, T
Ukleja, A
Ukleja, J
Zarnecki, AF
Adamus, M
Plucinski, P
Eisenberg, Y
Gladilin, LK
Hochman, D
Karshon, U
Riveline, M
Kcira, D
Lammers, S
Li, L
Reeder, DD
Rosin, M
Savin, AA
Smith, WH
Deshpande, A
Dhawan, S
Bhadra, S
Catterall, CD
Fourletov, S
Hartner, G
Menary, S
Soares, M
Standage, J
CA ZEUS Collaboration
TI Search for contact interactions, large extra dimensions and finite quark
radius in ep collisions at HERA
SO PHYSICS LETTERS B
LA English
DT Article
ID FERMION-PAIR PRODUCTION; DEEP-INELASTIC SCATTERING; HIGH-ACCURACY
CALCULATION; CURRENT CROSS-SECTIONS; PARITY NONCONSERVATION; STANDARD
MODEL; COMPOSITENESS SCALES; PARTON DISTRIBUTIONS; QCD ANALYSIS; PHYSICS
AB A search for physics beyond the Standard Model has been performed with high-Q(2) neutral current deep inelastic scattering events recorded with the ZEUS detector at HERA. Two data sets, e(+) p --> e(+) X and e(-) p --> e(-) X, with respective integrated luminosities of 112 pb(-1) and 16 pb(-1), were analyzed. The data reach Q(2) values as high as 40000 GeV2. No significant deviations from Standard Model predictions were observed. Limits were derived on the effective mass scale in eeqq contact interactions. the ratio of leptoquark mass to the Yukawa coupling for heavy leptoquark models and the mass scale parameter in models with large extra dimensions. The limit on the quark charge radius, in the classical form factor approximation, is 0.85 x 10(-16) cm. (C) 2004 Published by Elsevier B.V.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
Andrews Univ, Berrien Springs, MI 49104 USA.
Univ Bologna, Bologna, Italy.
Ist Nazl Fis Nucl, I-40126 Bologna, Italy.
Univ Bonn, Inst Phys, D-5300 Bonn, Germany.
Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England.
Univ Calabria, Dept Phys, I-87036 Cosenza, Italy.
Ist Nazl Fis Nucl, Cosenza, Italy.
Chonnam Natl Univ, Kwangju, South Korea.
Columbia Univ, Nevis Labs, Irvington, NY 10027 USA.
Inst Nucl Phys, Krakow, Poland.
Univ Sci & Technol, AGH, Fac Phys & Nucl Techniques, Krakow, Poland.
Jagiellonian Univ, Dept Phys, Krakow, Poland.
DESY, D-2000 Hamburg, Germany.
DESY, Zeuthen, Germany.
Univ Florence, Florence, Italy.
Ist Nazl Fis Nucl, I-50125 Florence, Italy.
Univ Freiburg, Fak Phys, D-7800 Freiburg, Germany.
Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland.
Univ Aegean, Dept Engn Management & Finance, Mitilini, Greece.
Univ Hamburg, Inst Expt Phys, Hamburg, Germany.
Univ London Imperial Coll Sci Technol & Med, High Energy Nucl Phys Grp, London, England.
Forschungszentrum Julich, Inst Kernphys, D-5170 Julich, Germany.
Kek Nat Lab High Energy Phys, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 305, Japan.
Minist Educ & Sci Kazakhstan, Inst Phys & Technol, Alma Ata, Kazakhstan.
Kyungpook Natl Univ, Ctr High Energy Phys, Taegu, South Korea.
Catholic Univ Louvain, Inst Phys Nucl, B-1348 Louvain, Belgium.
Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain.
McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
Meiji Gakuin Univ, Fac Gen Educ, Yokohama, Kanagawa, Japan.
Moscow Engn Phys Inst, Moscow 115409, Russia.
Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow, Russia.
Univ Amsterdam, Amsterdam, Netherlands.
NIKHEF H, NL-1009 DB Amsterdam, Netherlands.
Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
Univ Oxford, Dept Phys, Oxford, England.
Ist Nazl Fis Nucl, Padua, Italy.
Univ Padua, Dipartimento Fis, Padua, Italy.
Penn State Univ, Dept Phys, University Pk, PA 16802 USA.
Polytech Univ, Sagamihara, Kanagawa, Japan.
Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
Ist Nazl Fis Nucl, Rome, Italy.
Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA.
Ewha Womans Univ, Dept Phys, Seoul, South Korea.
Univ Siegen, Raymond & Beverly Sackler Fac Exact Sci, Siegen, Germany.
Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan.
Univ Tokyo, Dept Phys, Tokyo 113, Japan.
Tokyo Metropolitan Univ, Dept Phys, Tokyo, Japan.
Ist Nazl Fis Nucl, I-10125 Turin, Italy.
Univ Turin, Turin, Italy.
Univ Piemonte Orientale, Novara, Italy.
Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada.
Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada.
UCL, Dept Phys & Astron, London, England.
Warsaw Univ, Inst Expt Phys, Warsaw, Poland.
Inst Nucl Studies, PL-00681 Warsaw, Poland.
Weizmann Inst Sci, Dept Particel Phys, IL-76100 Rehovot, Israel.
Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
Yale Univ, Dept Phys, New Haven, CT 06520 USA.
York Univ, Dept Phys, N York, ON M3J 1P3, Canada.
UCL, London, England.
Nara Womens Univ, Nara 630, Japan.
Univ Tokyo, Tokyo, Japan.
Univ Hamburg, Hamburg, Germany.
Univ Lodz, PL-90131 Lodz, Poland.
RP Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM rik.yoshida@desy.de
RI De Pasquale, Salvatore/B-9165-2008; Gliga, Sebastian/K-4019-2015; Wing,
Matthew/C-2169-2008; Tassi, Enrico/K-3958-2015; Doyle,
Anthony/C-5889-2009; collins-tooth, christopher/A-9201-2012; Ferrando,
James/A-9192-2012; Golubkov, Yury/E-1643-2012; Levchenko,
B./D-9752-2012; Proskuryakov, Alexander/J-6166-2012; Dementiev,
Roman/K-7201-2012; Wiggers, Leo/B-5218-2015; Gladilin,
Leonid/B-5226-2011; Suchkov, Sergey/M-6671-2015; dusini,
stefano/J-3686-2012; Goncalo, Ricardo/M-3153-2016; Li,
Liang/O-1107-2015; Capua, Marcella/A-8549-2015;
OI Gutsche, Oliver/0000-0002-8015-9622; Raval, Amita/0000-0003-0164-4337;
PAGANIS, STATHES/0000-0002-1950-8993; De Pasquale,
Salvatore/0000-0001-9236-0748; Gliga, Sebastian/0000-0003-1729-1070;
Doyle, Anthony/0000-0001-6322-6195; Ferrando, James/0000-0002-1007-7816;
Wiggers, Leo/0000-0003-1060-0520; Gladilin, Leonid/0000-0001-9422-8636;
dusini, stefano/0000-0002-1128-0664; Goncalo,
Ricardo/0000-0002-3826-3442; Li, Liang/0000-0001-6411-6107; Capua,
Marcella/0000-0002-2443-6525; Arneodo, Michele/0000-0002-7790-7132;
Longhin, Andrea/0000-0001-9103-9936
NR 44
TC 33
Z9 33
U1 0
U2 2
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 1
PY 2004
VL 591
IS 1-2
BP 23
EP 41
DI 10.1016/j.physletb.2004.03.081
PG 19
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 830MQ
UT WOS:000222126700003
ER
PT J
AU Smith, AG
Patel, D
Simpson, GS
Wall, RM
Smith, JF
Onakanmi, OJ
Ahmad, I
Greene, JP
Carpenter, MP
Lauritsen, T
Lister, CJ
Janssens, RVF
Kondev, FG
Seweryniak, D
Gall, BJP
Dorvaux, O
Roux, B
AF Smith, AG
Patel, D
Simpson, GS
Wall, RM
Smith, JF
Onakanmi, OJ
Ahmad, I
Greene, JP
Carpenter, MP
Lauritsen, T
Lister, CJ
Janssens, RVF
Kondev, FG
Seweryniak, D
Gall, BJP
Dorvaux, O
Roux, B
TI The influence of vh(11/2) occupancy on the magnetic moments of
collective 2(1)(+) states in A similar to 100 fission fragments
SO PHYSICS LETTERS B
LA English
DT Article
ID SHELL-MODEL DESCRIPTION; EXCITED-STATES; NEUTRON EXCITATIONS;
NUCLEAR-DEFORMATION; ROTATIONAL BANDS; HYPERFINE-FIELD; PROTON;
ISOTOPES; REGION; TRANSITION
AB The magnetic moments of I-pi = 2(l)(+) states in even-even A similar to 100 fission fragments have been measured using the Gammasphere array, using the technique of time-integral perturbed angular correlations. The data are interpreted within the context of the interacting boson model (IBA2) leading to the suggestion of a strong vh(11/2) component in the deformed 2(1)(+) states of this region. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ Manchester, Manchester M13 9PL, Lancs, England.
Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
IN2P3, Inst Rech Subatom, CNRS, F-67037 Strasbourg, France.
Univ Strasbourg, F-67037 Strasbourg, France.
RP Univ Manchester, Manchester M13 9PL, Lancs, England.
EM gavin.smith@man.ac.uk
RI Carpenter, Michael/E-4287-2015
OI Carpenter, Michael/0000-0002-3237-5734
NR 48
TC 16
Z9 16
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 1
PY 2004
VL 591
IS 1-2
BP 55
EP 60
DI 10.1016/j.physletb.2004.03.091
PG 6
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 830MQ
UT WOS:000222126700006
ER
PT J
AU Kettell, SH
Landsberg, LG
Nguyen, H
AF Kettell, SH
Landsberg, LG
Nguyen, H
TI Alternative technique for standard model estimation of the rare kaon
decay branchings BR(K ->pi nu(nu)over-bar)vertical bar(SM)
SO PHYSICS OF ATOMIC NUCLEI
LA English
DT Article
ID LONG-DISTANCE CONTRIBUTION; MINIMAL FLAVOR VIOLATION; TOP-QUARK MASS;
LEADING LOGARITHMS; QCD CORRECTIONS; CP VIOLATION; SIN 2-BETA; CKM
MATRIX; PHYSICS; NU(NU)OVER-BAR
AB We estimate BR(K --> piv (v) over bar) in the context of the Standard Model by fitting for lambda(t) equivalent to VtdVts* of the "kaon unitarity triangle" relation. To find the vertex of this triangle, we fit data from \epsilonK\, the CP-violating parameter describing K mixing, and apsi(K), the CP-violating asymmetry in B-d(0) --> J/psiK(0) decays, and obtain the values BP,(K+ --> pi(+)v (v) over bar)(SM) = (7.07 +/- 1.03) x 10(-11) and BR(K-L(0) --> pi(0)v (v) over bar)\(SM) = L (2.60 +/- 0.52) x 10(-11). Our estimate is independent of the CKM matrix element V-cb and of the ratio of B-mixing frequencies Deltam(Bs)/DeltaM(Bd). We also use the constraint estimation of lambda(t) with additional data from Deltam(Bd) and \V-ub\. This combined analysis slightly increases the precision of the rate estimation of K+ --> pi(+)v (v) over bar and K-L(0) --> pi(0)v (v) over bar (by similar or equal to10and similar or equal to20%, respectively). The measured value of BR(K+ --> pi(+)v (v) over bar) L can be compared both to this estimate and to predictions made from Deltam(Bs)/Deltam(Bd). (C) 2004 MAIK "Nauka/Interperiodica".
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
Inst High Energy Phys, Protvino 142280, Moscow Oblast, Russia.
Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Brookhaven Natl Lab, Upton, NY 11973 USA.
NR 74
TC 5
Z9 5
U1 0
U2 0
PU MAIK NAUKA/INTERPERIODICA/SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA
SN 1063-7788
EI 1562-692X
J9 PHYS ATOM NUCL+
JI Phys. Atom. Nuclei
PD JUL
PY 2004
VL 67
IS 7
BP 1398
EP 1407
DI 10.1134/1.1777296
PG 10
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 846ZG
UT WOS:000223357700019
ER
PT J
AU Lancaster, KL
Karsch, S
Habara, H
Beg, FN
Clark, EL
Freeman, R
Key, MH
King, JA
Kodama, R
Krushelnick, K
Ledingham, KWD
McKenna, P
Murphy, CD
Norreys, PA
Stephens, R
Stoeckl, C
Toyama, Y
Wei, MS
Zepf, M
AF Lancaster, KL
Karsch, S
Habara, H
Beg, FN
Clark, EL
Freeman, R
Key, MH
King, JA
Kodama, R
Krushelnick, K
Ledingham, KWD
McKenna, P
Murphy, CD
Norreys, PA
Stephens, R
Stoeckl, C
Toyama, Y
Wei, MS
Zepf, M
TI Characterization of Li-7(p,n)Be-7 neutron yields from laser produced ion
beams for fast neutron radiography
SO PHYSICS OF PLASMAS
LA English
DT Article
ID HIGH-INTENSITY LASER; SOLID INTERACTIONS; PLASMA INTERACTION; PROTON
PRODUCTION; PULSES; ABSORPTION; GENERATION; TRANSPORT; DRIVEN
AB Investigations of Li-7(p,n)Be-7 reactions using Cu and CH primary and LiF secondary targets were performed using the VULCAN laser [C.N. Danson , J. Mod. Opt. 45, 1653 (1997)] with intensities up to 3x10(19) W cm(-2). The neutron yield was measured using CR-39 plastic track detector and the yield was up to 3x10(8) sr(-1) for CH primary targets and up to 2x10(8) sr(-1) for Cu primary targets. The angular distribution of neutrons was measured at various angles and revealed a relatively anisotropic neutron distribution over 180degrees that was greater than the error of measurement. It may be possible to exploit such reactions on high repetition, table-top lasers for neutron radiography. (C) 2004 American Institute of Physics.
C1 Rutherford Appleton Lab, CCLRC, Chilton OX11 0QX, Oxon, England.
Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England.
Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Osaka Univ, Inst Laser Engn, Osaka, Japan.
Univ Strathclyde, Dept Phys, Glasgow G4 0NG, Lanark, Scotland.
Gen Atom Co, San Diego, CA 92186 USA.
Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA.
Queens Univ Belfast, Belfast BT7 1NN, Antrim, North Ireland.
RP Rutherford Appleton Lab, CCLRC, Chilton OX11 0QX, Oxon, England.
RI McKenna, Paul/B-9764-2009; Toyama, Yusuke/H-8023-2012; Zepf,
Matt/M-1232-2014; Kodama, Ryosuke/G-2627-2016;
OI McKenna, Paul/0000-0001-8061-7091; Toyama, Yusuke/0000-0003-3230-1062;
Stephens, Richard/0000-0002-7034-6141
NR 32
TC 46
Z9 47
U1 1
U2 12
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD JUL
PY 2004
VL 11
IS 7
BP 3404
EP 3408
DI 10.1063/1.1756911
PG 5
WC Physics, Fluids & Plasmas
SC Physics
GA 830AR
UT WOS:000222094500010
ER
PT J
AU Ritchie, B
AF Ritchie, B
TI Quantum-shell corrections to Thomas-Fermi-Dirac equation-of-state theory
SO PHYSICS OF PLASMAS
LA English
DT Article
ID SHOCK COMPRESSIBILITY; DENSE MATTER; ALUMINUM; TEMPERATURES; PRESSURE;
MODEL; HOT
AB Quantum-shell corrections are made directly to the finite-temperature Thomas-Fermi-Dirac (TFD) statistical model of the atom by a partition of the electronic density into bound and free parts. The bound part is calculated using analytic basis functions whose parameters are chosen to minimize the energy and pressure. Poisson's equation is solved for the modified density. The shock Hugoniot is calculated for aluminum. Shell effects characteristic of quantum self-consistent field (QSCF) models are fully captured by the present theory. The use of a quantum decription of the bound density removes the physically spurious singularity at the origin which is present in TFD theory. (C) 2004 American Institute of Physics.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Ritchie, B (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
NR 16
TC 1
Z9 1
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 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD JUL
PY 2004
VL 11
IS 7
BP 3417
EP 3422
DI 10.1063/1.1751174
PG 6
WC Physics, Fluids & Plasmas
SC Physics
GA 830AR
UT WOS:000222094500012
ER
PT J
AU Slutz, SA
Vesey, RA
Shoemaker, I
Mehlhorn, TA
Cochrane, K
AF Slutz, SA
Vesey, RA
Shoemaker, I
Mehlhorn, TA
Cochrane, K
TI Subignition fusion yields generated by fast heating of compressed
deuterium-tritium and break-even scaling
SO PHYSICS OF PLASMAS
LA English
DT Article
ID FAST IGNITION; ELECTRON; CAPSULES; TARGETS; LASERS; GAIN
AB A simple model is presented to calculate the fusion yield from the fast heating of compressed deuterium-tritium (DT). The model is applicable when the fusion yield is small enough to neglect self-heating. Since 80% of the fusion yield escapes as 14 MeV neutrons, self-heating is small as long as the fusion yield is less than the deposited energy, i.e., the fusion gain, Qless than or equal to1. We show the model is in good agreement with detailed numerical simulations when this condition is satisfied, as will be the case for fast ignition experiments in the near future. The model is used to calculate the fast heating fusion yields as a function of the important parameters such as the fuel density, deposited energy, and pulse length. The model is also used to obtain the minimum energy, E-q1, and the fuel diameter, d, necessary to obtain Q=1, which is given approximately by the scaling laws E-q1=15.3(rho/100)(-1.5) kJ, and d=16.5(rho/100)(-0.84) mum, where rho is the DT density. These scaling laws should help the design of Q=1 experiments. (C) 2004 American Institute of Physics.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
Ktech Corp Inc, Albuquerque, NM 87106 USA.
RP Slutz, SA (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 16
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 JUL
PY 2004
VL 11
IS 7
BP 3483
EP 3490
DI 10.1063/1.1753574
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 830AR
UT WOS:000222094500019
ER
PT J
AU Wang, ZH
Tang, XZ
AF Wang, ZH
Tang, XZ
TI Compact toroids with Alfvenic flows
SO PHYSICS OF PLASMAS
LA English
DT Article
ID FIELD-REVERSED CONFIGURATIONS; MAGNETIZED PLASMA; RELAXATION; SPHEROMAK;
INSTABILITY; STABILITY; EQUATIONS
AB The Chandrasekhar equilibria form a class of stationary ideal magnetohydrodynamics equilibria stabilized by magnetic-field-aligned Alfvenic flows. Analytic solutions of the Chandrasekhar equilibria are explicitly constructed for both field-reversed configurations and spheromaks. Favorable confinement property of nested closed flux surfaces and the ideal magnetohydrodynamic stability of the compact toroids are of interest for both magnetic trapping of high energy electrons in astrophysics and confinement of high temperature plasmas in laboratory. (C) 2004 American Institute of Physics.
C1 Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA.
Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Wang, ZH (reprint author), Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA.
EM zwang@lanl.gov
NR 23
TC 3
Z9 3
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 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD JUL
PY 2004
VL 11
IS 7
BP 3502
EP 3509
DI 10.1063/1.1755707
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 830AR
UT WOS:000222094500022
ER
PT J
AU Kaganovich, ID
Startsev, EA
Davidson, RC
AF Kaganovich, ID
Startsev, EA
Davidson, RC
TI Nonlinear plasma waves excitation by intense ion beams in background
plasma
SO PHYSICS OF PLASMAS
LA English
DT Article
ID CHAMBER TRANSPORT; FUSION CHAMBER; NEUTRALIZATION; ACCELERATION;
SIMULATIONS
AB Plasma neutralization of an intense ion pulse is of interest for many applications, including plasma lenses, heavy ion fusion, cosmic ray propagation, etc. An analytical electron fluid model has been developed to describe the plasma response to a propagating ion beam. The model predicts very good charge neutralization during quasi-steady-state propagation, provided the beam pulse duration tau(b) is much longer than the electron plasma period 2pi/omega(p), where omega(p)=(4pie(2)n(p)/m)(1/2) is the electron plasma frequency, and n(p) is the background plasma density. In the opposite limit, the beam pulse excites large-amplitude plasma waves. If the beam density is larger than the background plasma density, the plasma waves break. Theoretical predictions are compared with the results of calculations utilizing a particle-in-cell (PIC) code. The cold electron fluid results agree well with the PIC simulations for ion beam propagation through a background plasma. The reduced fluid description derived in this paper can provide an important benchmark for numerical codes and yield scaling relations for different beam and plasma parameters. The visualization of numerical simulation data shows complex collective phenomena during beam entry and exit from the plasma. (C) 2004 American Institute of Physics.
C1 Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Kaganovich, ID (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
NR 23
TC 29
Z9 30
U1 2
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD JUL
PY 2004
VL 11
IS 7
BP 3546
EP 3552
DI 10.1063/1.1758945
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 830AR
UT WOS:000222094500028
ER
PT J
AU Ramshaw, JD
AF Ramshaw, JD
TI Approximate thermodynamic state relations in partially ionized gas
mixtures
SO PHYSICS OF PLASMAS
LA English
DT Article
ID SAHA EQUATION; 2-TEMPERATURE PLASMA
AB Thermodynamic state relations for mixtures of partially ionized nonideal gases are often approximated by artificially partitioning the mixture into compartments or subvolumes occupied by the pure partially ionized constituent gases, and requiring these subvolumes to be in temperature and pressure equilibrium. This intuitively reasonable procedure is easily shown to reproduce the correct thermal and caloric state equations for a mixture of neutral (nonionized) ideal gases. The purpose of this paper is to point out that (a) this procedure leads to incorrect state equations for a mixture of partially ionized ideal gases, whereas (b) the alternative procedure of requiring that the subvolumes all have the same temperature and free electron density reproduces the correct thermal and caloric state equations for such a mixture. These results readily generalize to the case of partially degenerate and/or relativistic electrons, to a common approximation used to represent pressure ionization effects, and to two-temperature plasmas. This suggests that equating the subvolume electron number densities or chemical potentials instead of pressures is likely to provide a more accurate approximation in nonideal plasma mixtures. (C) 2004 American Institute of Physics.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Ramshaw, JD (reprint author), Lawrence Livermore Natl Lab, POB 808,L-095, Livermore, CA 94551 USA.
NR 15
TC 2
Z9 2
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD JUL
PY 2004
VL 11
IS 7
BP 3572
EP 3578
DI 10.1063/1.1758717
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 830AR
UT WOS:000222094500031
ER
PT J
AU Miles, AR
Braun, DG
Edwards, MJ
Robey, HF
Drake, RP
Leibrandt, DR
AF Miles, AR
Braun, DG
Edwards, MJ
Robey, HF
Drake, RP
Leibrandt, DR
TI Numerical simulation of supernova-relevant laser-driven hydro
experiments on OMEGA
SO PHYSICS OF PLASMAS
LA English
DT Article
ID RAYLEIGH-TAYLOR; NOVA LASER; INSTABILITY; HYDRODYNAMICS; SIMILARITY;
TRANSITION; SN-1987A; FLUIDS; FRONTS; MODELS
AB In ongoing experiments performed on the OMEGA laser [J. M. Soures , Phys. Plasmas 5, 2108 (1996)] at the University of Rochester Laboratory for Laser Energetics, nanosecond laser pulses are used to drive strong blast waves into two-layer targets. Perturbations on the interface between the two materials are unstable to the Richtmyer-Meshkov instability as a result of shock transit and the Rayleigh-Taylor instability during the deceleration-phase behind the shock front. These experiments are designed to produce a strongly shocked interface whose evolution is a scaled version of the unstable hydrogen-helium interface in core-collapse supernovae such as SN 1987A. The ultimate goal of this research is to develop an understanding of the effect of hydrodynamic instabilities and the resulting transition to turbulence on supernovae observables that remain as yet unexplained. The authors are, at present, particularly interested in the development of the Rayleigh-Taylor instability through the late nonlinear stage, the transition to turbulence, and the subsequent transport of material within the turbulent region. In this paper, the results of numerical simulations of two-dimensional (2D) single and multimode experiments are presented. These simulations are run using the 2D Arbitrary Lagrangian Eulerian radiation hydrodynamics code CALE [R. T. Barton, Numerical Astrophysics (Jones and Bartlett, Boston, 1985)]. The simulation results are shown to compare well with experimental radiography. A buoyancy-drag model captures the behavior of the single-mode interface, but gives only partial agreement in the multimode cases. The Richtmyer-Meshkov and target decompression contributions to the perturbation growth are both estimated and shown to be significant. Significant dependence of the simulation results on the material equation of state is demonstrated, and the prospect of continuing the experiments to conclusively demonstrate the transition to turbulence is discussed. (C) 2004 American Institute of Physics.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Univ Maryland, College Pk, MD 20741 USA.
Univ Michigan, Ann Arbor, MI 48109 USA.
RP Miles, AR (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM miles15@llnl.gov
RI Drake, R Paul/I-9218-2012
OI Drake, R Paul/0000-0002-5450-9844
NR 35
TC 33
Z9 34
U1 1
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 JUL
PY 2004
VL 11
IS 7
BP 3631
EP 3645
DI 10.1063/1.1753274
PG 15
WC Physics, Fluids & Plasmas
SC Physics
GA 830AR
UT WOS:000222094500039
ER
PT J
AU Fredrickson, ED
Gorelenkov, NN
Menard, J
AF Fredrickson, ED
Gorelenkov, NN
Menard, J
TI Phenomenology of compressional Alfven eigenmodes
SO PHYSICS OF PLASMAS
LA English
DT Article
ID SPHERICAL TORUS EXPERIMENT; ION-CYCLOTRON EMISSION; FUSION PRODUCTS;
BEAM IONS; EXCITATION; TOKAMAKS; INSTABILITY; PLASMAS; DRIVEN; MODES
AB Coherent oscillations with frequency 0.3less than or equal toomega/omega(ci)less than or equal to1, are seen in the National Spherical Torus Experiment [M. Ono, S. M. Kaye, Y.-K. M. Peng , Nucl. Fusion 40, 557 (2000)]. This paper presents new data and analysis comparing characteristics of the observed modes to the model of compressional Alfven eigenmodes (CAE). The toroidal mode number has been measured and is typically between 76.4 and was favorable for root development and biomass production at both reclaimed sites. No significant differences in several soil properties between UMS and RMS showed that fertility treatments improved the soil quality of RMS.
C1 Ohio State Univ, Carbon Management & Sequestrat Ctr, Columbus, OH 43210 USA.
Ohio State Univ, Sch Nat Resources, FAES, Columbus, OH 43210 USA.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Shukla, MK (reprint author), Ohio State Univ, Carbon Management & Sequestrat Ctr, Columbus, OH 43210 USA.
EM shukla.9@osu.edu
RI Lal, Rattan/D-2505-2013
NR 48
TC 43
Z9 53
U1 1
U2 20
PU SOIL SCI SOC AMER
PI MADISON
PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA
SN 0361-5995
J9 SOIL SCI SOC AM J
JI Soil Sci. Soc. Am. J.
PD JUL-AUG
PY 2004
VL 68
IS 4
BP 1352
EP 1359
PG 8
WC Soil Science
SC Agriculture
GA 837EX
UT WOS:000222612400027
ER
PT J
AU Yoon, YG
Pfrommer, BG
Louie, SG
Canning, A
AF Yoon, YG
Pfrommer, BG
Louie, SG
Canning, A
TI NMR chemical shifts in amino acids: effects of environments in the
condensed phase
SO SOLID STATE COMMUNICATIONS
LA English
DT Article
DE NMR chemical shift; amino acid; glycine; hydrogen-bond
ID DIFFRACTION STRUCTURE DETERMINATION; L-ALANINE; MOLECULAR STRUCTURE;
AB-INITIO; ALPHA-GLYCINE; SOLID-STATE; CRYSTAL; PROTEIN; C-13;
SPECTROSCOPY
AB We present calculations of NMR chemical shifts in crystalline phases of some representative amino acids such as glycine, alanine, and alanyl-alanine. We explore the effects of environment on the chemical shifts in selected glycine geometries ranging from the crystalline phase to completely isolated molecules. In the crystalline and dilute molecular limits, the calculated distinct NMR chemical shifts are attributed to intermolecular hydrogen-bonds and dipole electric field effects, respectively. (C) 2004 Elsevier Ltd. All rights reserved.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
Lawrence Berkeley Natl Lab, Dept Mat, Div Sci, Berkeley, CA 94720 USA.
Lawrence Berkeley Natl Lab, Natl Energy Res Sci Comp Ctr, Berkeley, CA 94720 USA.
RP Chung Ang Univ, Dept Phys, Dongjak Ku, 221 Huksuk Dong, Seoul 156756, South Korea.
EM yyoon@cau.ac.kr
RI Yoon, Young-Gui/C-2978-2008
OI Yoon, Young-Gui/0000-0002-1071-8628
NR 25
TC 6
Z9 6
U1 1
U2 3
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0038-1098
EI 1879-2766
J9 SOLID STATE COMMUN
JI Solid State Commun.
PD JUL
PY 2004
VL 131
IS 1
BP 15
EP 19
DI 10.1016/j.ssc.2004.04.023
PG 5
WC Physics, Condensed Matter
SC Physics
GA 826QQ
UT WOS:000221844000004
ER
PT J
AU Li, MY
Ma, B
Koritala, RE
Fisher, BL
Zhao, XZ
Maroni, VA
Dorris, SE
Balachandran, U
AF Li, MY
Ma, B
Koritala, RE
Fisher, BL
Zhao, XZ
Maroni, VA
Dorris, SE
Balachandran, U
TI c-Axis orientation control of YBa2CU3O7-x films grown on
inclined-substrate-deposited MgO-buffered metallic substrates
SO SOLID STATE COMMUNICATIONS
LA English
DT Article
DE YBCO-coated conductor; inclined substrate deposition; x-ray pole-figure
analysis; orientation control
ID YBCO-COATED CONDUCTORS; THIN-FILMS; BICRYSTALS; LAYERS
AB Biaxially textured YBa2Cu3O7-x (YBCO) films were grown on non-textured metal substrates with inclined-substrate-deposited (ISD) MgO as template. The biaxial texture feature of the films was examined by X-ray pole-figure analysis, phi-scan, and 2theta-scan. A tilt angle of 32degrees of the MgO[001] with respect to the substrate normal wits observed. Epitaxial growth of YBCO films with c-axis tilt angle of 32degrees with respect to the substrate normal was obtained on these substrates with SrTiO3(STO) as buffer layer. Whereas, by choosing yttria-stabilized ZrO2 and CeO2, instead of STO as buffer layer, a c-axis untilted YBCO film was obtained. Higher values of T-c =91 K and J(c) =5.5 x 10(5) A/cm(2) were obtained on the c-axis untilted YBCO films with 0.46 mum thickness at 77 K in zero field. Comparative studies revealed a unique role of CeO2 in controlling the orientation of the YBCO films grown or ISD-MgO buffered metal substrates. (C) 2004 Elsevier Ltd. All rights reserved.
C1 Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China.
Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA.
Argonne Natl Lab, Div Chem Technol, Argonne, IL 60439 USA.
RP Li, MY (reprint author), Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China.
EM myli@whu.edu.cn
RI Koritala, Rachel/F-1774-2011; Zhao, Xing-Zhong/A-8671-2011; Ma,
Beihai/I-1674-2013
OI Ma, Beihai/0000-0003-3557-2773
NR 14
TC 7
Z9 7
U1 0
U2 7
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0038-1098
J9 SOLID STATE COMMUN
JI Solid State Commun.
PD JUL
PY 2004
VL 131
IS 2
BP 101
EP 105
DI 10.1016/j.ssc.2004.04.038
PG 5
WC Physics, Condensed Matter
SC Physics
GA 833ZI
UT WOS:000222379900007
ER
PT J
AU Ramirez, AP
Lawes, G
Li, D
Subramanian, MA
AF Ramirez, AP
Lawes, G
Li, D
Subramanian, MA
TI Valence-electron transfer and a metal-insulator transition in a strongly
correlated perovskite oxide
SO SOLID STATE COMMUNICATIONS
LA English
DT Article
DE ruthenates; cuprates; metal-insulator transition
ID HIGH-DIELECTRIC-CONSTANT; SUPERCONDUCTIVITY; COPPER
AB We present transport and thermal data for the quadruple-perovskites MCu3(Ti1-xRux)(4)O-12, where 0 < x < 1. A metal-insulator transition (MIT) Occurs for Ru concentrations x similar to 0.75. At the same time, the Cu2+ antiferromagnetic state is destroyed and it's magnetic entropy suppressed by Ru on a 1: 1 basis. This implies that each Ru transfers an electron to a Cu ion and thus the MIT correlates with filling the Cu 3d shell. The Cu spin entropy in this strongly correlated electron material provides a unique probe among MIT systems. (C) 2004 Elsevier Ltd. All rights reserved.
C1 Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
Dupont Cent Res & Dev, Expt Stn, Wilmington, DE 19880 USA.
RP Ramirez, AP (reprint author), Bell Labs, Lucent Technol, 600 Mt Ave, Murray Hill, NJ 07974 USA.
EM apr@lucent.com
NR 22
TC 34
Z9 34
U1 0
U2 8
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0038-1098
J9 SOLID STATE COMMUN
JI Solid State Commun.
PD JUL
PY 2004
VL 131
IS 3-4
BP 251
EP 255
DI 10.1016/j.ssc.2004.04.014
PG 5
WC Physics, Condensed Matter
SC Physics
GA 838FH
UT WOS:000222698400020
ER
PT J
AU Assefa, Z
Haire, RG
Caulder, DL
Shuh, DK
AF Assefa, Z
Haire, RG
Caulder, DL
Shuh, DK
TI Correlation of the oxidation state of cerium in sol-gel glasses as a
function of thermal treatment via optical spectroscopy and XANES studies
SO SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
LA English
DT Article
DE cerium; sol-gel; absorption; spectroscopy; XANES; photoluminescence
ID X-RAY-ABSORPTION; SILICA GLASSES; BORATE GLASS; THIN-FILMS;
LUMINESCENCE; MECHANISM; COATINGS; KINETICS; BOROSILICATE; ACETONITRILE
AB Sol-gel glass matrices containing lanthanides have numerous technological applications and their formation involves several chemical facets. In the case of cerium, its ability to exist in two different oxidation states or in mixed valence state provides additional complexities for the sol-gel process. The oxidation state of cerium present during different facets of preparation of sol-gel glasses, and also as a function of the starting oxidation state of cerium added, were studied both by optical spectroscopy and X-ray absorption near-edge structures (XANES). The findings acquired by each approach were compared. The primary focus was on the redox chemistries associated with sample preparation, gelation, and thermal treatment. When Ce3+ is introduced into the starting sols, the trivalent state normally prevails in the wet and room temperature-dried gels. Heating in air at >100 degreesC can generate a light yellow coloration with partial oxidation to the tetravalent state. Above 200 degreesC and up to similar to1000 degreesC. cerium is oxidized to its tetravalent state. In contrast, when tetravalent cerium is introduced into the sol, both the wet and room temperature-dried gels lose the yellow-brown color of the initial ceric ammonium nitrate solution. When the sol-gel is heated to 110 degreesC it turns yellowish as the cerium tends to be re-oxidized. The yellow color is believed to represent the effect of oxidation and oligomerization of the cerium-silanol units in the matrix. The luminescence properties are also affected by these changes, the details of which are reported herein. Published by Elsevier B.V.
C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
Lawrence Berkeley Natl Lab, Actinide Chem Grp, Div Chem Sci, Berkeley, CA 94720 USA.
RP Assefa, Z (reprint author), Oak Ridge Natl Lab, Div Chem Sci, POB 2008, Oak Ridge, TN 37831 USA.
EM assefaz@ornl.gov
NR 36
TC 9
Z9 9
U1 0
U2 9
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1386-1425
J9 SPECTROCHIM ACTA A
JI Spectroc. Acta Pt. A-Molec. Biomolec. Spectr.
PD JUL
PY 2004
VL 60
IS 8-9
BP 1873
EP 1881
DI 10.1016/j.saa.2003.10.005
PG 9
WC Spectroscopy
SC Spectroscopy
GA 843WB
UT WOS:000223116400024
PM 15248963
ER
PT J
AU Simpson, TW
Booker, AJ
Ghosh, D
Giunta, AA
Koch, PN
Yang, RJ
AF Simpson, TW
Booker, AJ
Ghosh, D
Giunta, AA
Koch, PN
Yang, RJ
TI Approximation methods in multidisciplinary analysis and optimization: a
panel discussion
SO STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
LA English
DT Article; Proceedings Paper
CT 3rd ISSMO/AIAA Internet Conference on Approximations in Optimization
CY OCT 14-25, 2002
CL ELECTR NETWORK
SP ISSMO, AIAA
DE analysis of variance; approximation methods; design of experiments;
kriging; response surfaces; surrogate models
ID RESPONSE-SURFACE APPROXIMATIONS; COMPUTER EXPERIMENTS; ROBUST
OPTIMIZATION; DESIGN OPTIMIZATION; ENGINEERING DESIGN; BAYESIAN DESIGN;
QUALITY-CONTROL; PREDICTION; SURROGATES; SIMULATION
AB This paper summarizes the discussion at the Approximation Methods Panel that was held at the 9(th)AIAA/ISSMO Symposium on Multidisciplinary Analysis & Optimization in Atlanta, GA on September 2-4, 2002. The objective of the panel was to discuss the current state-of-the-art of approximation methods and identify future research directions important to the community. The panel consisted of five representatives from industry and government: (1) Andrew J. Booker from The Boeing Company, (2) Dipankar Ghosh from Vanderplaats Research & Development, (3) Anthony A. Giunta from Sandia National Laboratories, (4) Patrick N. Koch from Engineous Software, Inc., and (5) Ren-Jye Yang from Ford Motor Company. Each panelist was asked to (i) give one or two brief examples of typical uses of approximation methods by his company, (ii) describe the current state-of-the-art of these methods used by his company, (iii) describe the current challenges in the use and adoption of approximation methods within his company, and (iv) identify future research directions in approximation methods. Several common themes arose from the discussion, including differentiating between design of experiments and design and analysis of computer experiments, visualizing experimental results and data from approximation models, capturing uncertainty with approximation methods, and handling problems with large numbers of variables. These are discussed in turn along with the future directions identified by the panelists, which emphasized educating engineers in using approximation methods.
C1 Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA.
Boeing Co, Seattle, WA 98124 USA.
Vanderplaats Res & Dev Inc, Colorado Springs, CO 80906 USA.
Sandia Natl Labs, Optimizat & Uncertainty Estimat Dept, Albuquerque, NM 87185 USA.
Engineous Software Inc, Adv Technol & Applicat, Cary, NC 27513 USA.
Ford Res & Adv Engn, Optimizat & Robustness Safety R&A, Dearborn, MI 48124 USA.
RP Simpson, TW (reprint author), Penn State Univ, Dept Mech & Nucl Engn, 329 Leonhard Bldg, University Pk, PA 16802 USA.
EM tws8@psu.edu; andrew.j.booker@boeing.com; dg@vrand.com;
aagiunt@sandia.gov; patrick.koch@engineous.com; ryang@ford.com
NR 85
TC 155
Z9 169
U1 6
U2 45
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 1615-147X
J9 STRUCT MULTIDISCIP O
JI Struct. Multidiscip. Optim.
PD JUL
PY 2004
VL 27
IS 5
BP 302
EP 313
DI 10.1007/s00158-004-0389-9
PG 12
WC Computer Science, Interdisciplinary Applications; Engineering,
Multidisciplinary; Mechanics
SC Computer Science; Engineering; Mechanics
GA 834CR
UT WOS:000222389700002
ER
PT J
AU Stojanoff, V
AF Stojanoff, V
TI A novel approach to high-throughput screening: A solution for structural
genomics?
SO STRUCTURE
LA English
DT Editorial Material
AB A quasi in situ technique for screening of diffraction quality biomolecular crystals presents itself to revolutionize the crystallogenesis field.
C1 Brookhaven Natl Lab, NSLS, Upton, NY 11973 USA.
RP Stojanoff, V (reprint author), Brookhaven Natl Lab, NSLS, Upton, NY 11973 USA.
RI stojanoff, vivian /I-7290-2012
OI stojanoff, vivian /0000-0002-6650-512X
NR 6
TC 1
Z9 3
U1 0
U2 0
PU CELL PRESS
PI CAMBRIDGE
PA 1100 MASSACHUSETTS AVE, CAMBRIDGE, MA 02138 USA
SN 0969-2126
J9 STRUCTURE
JI Structure
PD JUL
PY 2004
VL 12
IS 7
BP 1127
EP 1128
DI 10.1016/j.str.2004.06.010
PG 2
WC Biochemistry & Molecular Biology; Biophysics; Cell Biology
SC Biochemistry & Molecular Biology; Biophysics; Cell Biology
GA 840NP
UT WOS:000222866100007
PM 15242588
ER
PT J
AU Zhang, RG
Wu, RY
Joachimiak, G
Mazmanian, SK
Missiakas, DM
Gornicki, P
Schneewind, O
Joachimiak, A
AF Zhang, RG
Wu, RY
Joachimiak, G
Mazmanian, SK
Missiakas, DM
Gornicki, P
Schneewind, O
Joachimiak, A
TI Structures of sortase B from staphylococcus aureus and Bacillus
anthracis reveal catalytic amino acid triad in the active site
SO STRUCTURE
LA English
DT Article
ID GRAM-POSITIVE BACTERIA; IMIDAZOLIUM ION-PAIR; SURFACE-PROTEINS;
CELL-WALL; ANCHOR STRUCTURE; LISTERIA-MONOCYTOGENES; SRTA GENE;
IN-VITRO; STREPTOCOCCUS-PNEUMONIAE; PEPTIDOGLYCAN SYNTHESIS
AB Surface proteins attached by sortases to the cell wall envelope of bacterial pathogens play important roles during infection. Sorting and attachment of these proteins is directed by C-terminal signals. Sortase B of S. aureus recognizes a motif NPQTN, cleaves the polypeptide after the Thr residue, and attaches the protein to pentaglycine cross-bridges. Sortase B of B. anthracis is thought to recognize the NPKTG motif, and attaches surface proteins to m-diaminopimelic acid cross-bridges. We have determined crystal structure of sortase B from B. anthracis and S. aureus at 1.6 and 2.0 Angstrom resolutions, respectively. These structures show a beta-barrel fold with alpha-helical elements on its outside, a structure thus far exclusive to the sortase family. A putative active site located on the edge of the beta-barrel is comprised of a Cys-His-Asp catalytic triad and presumably faces the bacterial cell surface. A putative binding site for the sorting signal is located nearby.
C1 Argonne Natl Lab, Struct Biol Ctr, Argonne, IL 60439 USA.
Argonne Natl Lab, Midwest Ctr Struct Genom, Argonne, IL 60439 USA.
Univ Chicago, Comm Microbiol, Chicago, IL 60637 USA.
Univ Chicago, Dept Mol Genet & Cell Biol, Chicago, IL 60637 USA.
Univ Chicago, Dept Biochem & Mol Biol, Chicago, IL 60637 USA.
RP Joachimiak, A (reprint author), Argonne Natl Lab, Struct Biol Ctr, 9700 S Cass Ave,Bldg 202, Argonne, IL 60439 USA.
EM andrzejj@anl.gov
OI Mazmanian, Sarkis/0000-0003-2713-1513
FU NIAID NIH HHS [AI 52474, R01 AI038897, R01 AI052474, U54 AI057153,
AI38897, 1U54 AI 057153]; NIGMS NIH HHS [GM 58266, P50 GM062414-02, GM
62414, P50 GM062414, R01 GM058266]
NR 53
TC 52
Z9 54
U1 0
U2 3
PU CELL PRESS
PI CAMBRIDGE
PA 1100 MASSACHUSETTS AVE, CAMBRIDGE, MA 02138 USA
SN 0969-2126
J9 STRUCTURE
JI Structure
PD JUL
PY 2004
VL 12
IS 7
BP 1147
EP 1156
DI 10.1016/j.str.2004.06.001
PG 10
WC Biochemistry & Molecular Biology; Biophysics; Cell Biology
SC Biochemistry & Molecular Biology; Biophysics; Cell Biology
GA 840NP
UT WOS:000222866100010
PM 15242591
ER
PT J
AU Bruno, AC
Espy, MA
AF Bruno, AC
Espy, MA
TI Design of a SQUID array as a discrete spatial filter
SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY
LA English
DT Article
AB A discrete spatial filter has been realized from a linear array of high temperature SQUIDS. We used two design methods to obtain several spatial frequency responses. The design consists of finding a weighting factor for each SQUID amplifier and setting the number of SQUIDS in the array. The results are discussed and checked experimentally with magnetic dipole sources at different lift-offs. The SQUID array keeps the original signal characteristics of the source and can even increase the noise rejection obtained with electronic planar first-order gradiometers.
C1 Pontificia Univ Catolica Rio de Janeiro, Dept Phys, BR-22453900 Rio De Janeiro, Brazil.
Los Alamos Natl Lab, Biophys Grp, Los Alamos, NM 87545 USA.
RP Bruno, AC (reprint author), Pontificia Univ Catolica Rio de Janeiro, Dept Phys, Rua Marques Sao Vicente 225, BR-22453900 Rio De Janeiro, Brazil.
EM acbruno@fis.puc-rio.br
NR 10
TC 1
Z9 1
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-2048
J9 SUPERCOND SCI TECH
JI Supercond. Sci. Technol.
PD JUL
PY 2004
VL 17
IS 7
BP 908
EP 915
AR PII S0953-2048(04)73636-2
DI 10.1088/0953-2048/17/7/014
PG 8
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 847BD
UT WOS:000223362800016
ER
PT J
AU Cooley, LD
Kang, K
Klie, RF
Li, Q
Moodenbaugh, AM
Sabatini, RL
AF Cooley, LD
Kang, K
Klie, RF
Li, Q
Moodenbaugh, AM
Sabatini, RL
TI Formation of MgB2 at low temperatures by reaction of Mg with B6Si
SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY
LA English
DT Article
ID CRITICAL-CURRENT DENSITY; SUPERCONDUCTOR; STOICHIOMETRY; SUBSTITUTION;
TAPES
AB Formation of MgB2 by reactions of Mg with B6Si and Mg with B were compared, the former also producing Mg2Si as a major product. Compared to the binary system, the ternary reactions for identical time and temperature were more complete at 750degreesC and below, as indicated by higher diamagnetic shielding and larger x-ray diffraction peak intensities relative to those of Mg. MgB2 could be produced at temperatures as low as 450degreesC by the ternary reaction. Analyses by electron microscopy, x-ray diffraction and of the upper critical field show that Si does not enter the MgB2 phase.
C1 Brookhaven Natl Lab, Div Mat Sci, Upton, NY 11973 USA.
RP Cooley, LD (reprint author), Brookhaven Natl Lab, Div Mat Sci, Upton, NY 11973 USA.
RI Cooley, Lance/E-7377-2015;
OI Cooley, Lance/0000-0003-3488-2980; Moodenbaugh,
Arnold/0000-0002-3415-6762
NR 24
TC 9
Z9 10
U1 0
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-2048
J9 SUPERCOND SCI TECH
JI Supercond. Sci. Technol.
PD JUL
PY 2004
VL 17
IS 7
BP 942
EP 946
AR PII S0953-2048(04)77783-0
DI 10.1088/0953-2048/17/7/020
PG 5
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 847BD
UT WOS:000223362800022
ER
PT J
AU Bull, RJ
Sasser, LB
Lei, XC
AF Bull, RJ
Sasser, LB
Lei, XC
TI Interactions in the tumor-promoting activity of carbon tetrachloride,
trichloroacetate, and dichloroacetate in the liver of male B6C3F1 mice
SO TOXICOLOGY
LA English
DT Article
DE trichloroethylene; carbon tetrachloride; dichloroacetate;
trichloroacetate; interactions of tumor promoters
ID IN-VIVO; LIPID-PEROXIDATION; ACID; HEPATOCARCINOGENESIS;
TRICHLOROETHYLENE; HEPATOCYTES; INDUCTION; INSULIN; MODE; DCA
AB Interactions between carcinogens in mixtures found in the environment have been a concern for several decades. In the present study, male B6C3F1 mice were used to study the responses to mixtures of dichloroacetate (DCA), trichloroacetate (TCA), and carbon tetrachloride (CT). TCA produces liver tumors in mice with the phenotypic characteristics common to peroxisome proliferators. DCA increases the growth of liver tumors with a phenotype that is distinct in several respects from those produced by TCA. These chemicals are effective as carcinogens at doses that do not produce cytotoxicity. Thus, they encourage clonal expansion of initiated cells through subtle, selective mechanisms. CT is well known for its ability to promote the growth of liver tumors through cytotoxicity that produces a generalized growth stimulus in the liver that is reflected in a reparative hyperplasia. Thus, CT is relatively non-specific in its promotion of initiated cells within the liver. The objective of this study was to determine how the differing modes of action of these chemicals might interact when given as mixed exposures. The hypothesis was that the effects of two selective promoters would not be more than additive. On the other hand, CT would be selective only to cells not sensitive to its effects as a cytotoxin. Thus, it was hypothesized that neither DCA nor TCA would add significantly to the effects produced by CT. Mice were initiated by vinyl carbamate (VC), and then promoted by DCA, TCA, CT, or the pair-wised combinations of the three compounds. The effect of each treatment or treatment combination on tumor number per animal and mean tumor volume was assessed in each animal. Dose-related increases in mean tumor volume were observed with 20 and 50 mg/kg CT, but each produced equal numbers of tumors at 36 weeks. As the dose of CT was increased to greater than or equal to100 mg/kg substantial increases in the number of tumors per animal were observed, but the mean tumor size decreased. This finding suggests that initiation occurs as doses of CT increase to greater than or equal to100 mg/kg, perhaps as a result of the inflammatory response that is known to occur with high doses of CT. When administered: alone in the drinking water at 0.1, 0.5 and 2 g/l, DCA increased both tumor number and tumor size in a dose-related manner. With TCA treatment at 2 g/l in drinking water a maximum tumor number was reached by 24 weeks and was maintained until 36 weeks of treatment. DCA treatment did not produce a plateau in tumor number within the experimental period, but the numbers observed at the end of the experimental period were similar to TCA and doses of 50 mg/kg CT. The tumor numbers observed at the end of the experiment are consistent with the assumption that the administered dose of the tumor initiator, vinyl carbamate, was the major determinant of tumor number and that treatments with CT, DCA, and TCA primarily affected tumor size. The results with mixtures of these compounds were consistent with the basic hypotheses that the responses to tumor promoters with differing mechanisms are limited to additivity at low effective doses. More complex, mutually inhibitory activity was more often observed between the three compounds. At 24 weeks, DCA produced a decrease in tumor numbers promoted by TCA, but the numbers were not different from TCA alone at 36 weeks. The reason for this result became apparent at 36 weeks of treatment where a dose-related decrease in the size of tumors promoted by TCA resulted from DCA co-administration. On the other hand, the low dose of TCA (0.
1 g/l) decreased the number of tumors produced by a high dose of DCA (2 g/l), but higher doses of TCA (2 g/l) produced the same number as observed with DCA alone. DCA inhibited the growth rate of CT-induced tumors (CT dose = 50 mg/kg). TCA substantially increased the numbers of tumors observed at early time points when combined with CT, but this was not observed at 36 weeks. The lack of an effect at 36 weeks was attributable to the fact that more than 90% of the livers consisted of tumors and the earlier effect was masked by coalescence of tumors. Thus, the ability of TCA to significantly increase tumor numbers in CT-treated mice was probably real and contrary to our original hypothesis that CT was non-specific in its effects on initiated cells. It is probable that the interaction between CT and TCA is explained through stimulation of the growth of cells with differing phenotypes. These data suggest that the outcome of interactions between the mechanisms of tumor promotion vary based on the characteristics of the initiated cells. The interactions may result in additive or inhibitory effects, but no significant evidence of synergy was observed. (C) 2004 Elsevier Ireland Ltd. All rights reserved.
C1 Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Bull, RJ (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM rjbull@earthlink.net
RI WSU, USTUR/I-1056-2013
NR 29
TC 9
Z9 9
U1 1
U2 5
PU ELSEVIER SCI IRELAND LTD
PI CLARE
PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE,
IRELAND
SN 0300-483X
J9 TOXICOLOGY
JI Toxicology
PD JUL 1
PY 2004
VL 199
IS 2-3
BP 169
EP 183
DI 10.1016/j.tox.2004.02.018
PG 15
WC Pharmacology & Pharmacy; Toxicology
SC Pharmacology & Pharmacy; Toxicology
GA 825TX
UT WOS:000221782300009
PM 15147791
ER
PT J
AU Erdemir, A
AF Erdemir, A
TI Design criteria for superlubricity in carbon films and related
microstructures
SO TRIBOLOGY INTERNATIONAL
LA English
DT Article
DE carbon films; superlubricity; microstructure; design criteria
ID NANOCRYSTALLINE DIAMOND FILMS; TRIBOLOGICAL PROPERTIES;
SUPERLOW-FRICTION; SILICON-CARBIDE; COATINGS; PERFORMANCE; PLASMAS
AB Carbon offers the kind of flexibility that one needs in the design and production of chemically unique microstructures with properties ranging from superlubricity to super-hardness and/or -softness. This flexibility can be exploited for numerous tribological applications, ranging in sizes from nano-scale electromechanical systems to meso-scale engine parts and components. Recently, carbon was used in our laboratory to produce nearly frictionless carbon (NFC) films having friction coefficients as low as 0.001 and wear rates of 10(-11)-10(-10) mm(3)/N in even under dry sliding conditions and at very high contact pressures. Using advanced fabrication and chemical vapor deposition methods, our research team has pioneered the development of other unique microstructures possessing exceptional physical, chemical, mechanical, electrical, and tribological properties. The combination of such exceptional properties in one material is rather rare, but urgently needed by the industry to meet the increasingly multifunctional needs of advanced mechanical systems and devices. This paper provides an overview of recent progress in the study and understanding of the tribological properties of carbon-based coatings. The design and surface engineering aspects of such coatings are discussed and the principles of superlubricity in these films are presented. Examples of current and future applications for two- and three-dimensional carbon-based structures are also provided. (C) 2003 Elsevier Ltd. All rights reserved.
C1 Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA.
RP Erdemir, A (reprint author), Argonne Natl Lab, Div Energy Technol, 9700 S Cass Ave ET 212, Argonne, IL 60439 USA.
EM erdemir@anl.gov
NR 27
TC 57
Z9 62
U1 2
U2 21
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0301-679X
J9 TRIBOL INT
JI Tribol. Int.
PD JUL
PY 2004
VL 37
IS 7
BP 577
EP 583
DI 10.1016/j.triboint.2003.12.007
PG 7
WC Engineering, Mechanical
SC Engineering
GA 825DM
UT WOS:000221736200008
ER
PT J
AU Evans, RD
More, KL
Darragh, CV
Nixon, HP
AF Evans, RD
More, KL
Darragh, CV
Nixon, HP
TI Transmission electron microscopy of boundary-lubricated bearing
surfaces. Part I: Mineral oil lubricant
SO TRIBOLOGY TRANSACTIONS
LA English
DT Article; Proceedings Paper
CT 59th Annual Meeting of the
Society-of-Tribologists-and-Lubrication-Engineers
CY MAY 17-20, 2004
CL Toronto, CANADA
SP Soc Tribologists & Lubricat Engineers
DE tapered roller bearing; boundary lubrication; oxides; surface films;
transmission electron microscopy (TEM); wear
ID FOCUSED ION-BEAM; CONTACT FATIGUE; SLIDING CONTACT; STEEL SURFACES;
BALL-BEARINGS; WORN SURFACE; OXIDE; FILMS; MICROSTRUCTURE; DEFORMATION
AB Transmission electron microscopy (TEM) was performed on the near-surface material (depth <500 nm) of tapered roller bearing inner rings (cones) that were tested at two levels of boundary-lubricated conditions in mineral oil with no additives. Site-specific thinning of cross section cone surface sections for TEM analyses was conducted using the focused ion beam (FIB) milling technique. High-resolution structural and compositional characterization of near-surface material and surface layers was performed on an untested cone as well as cones tested at Lambda similar to 1.1 and 0.3. This approach revealed near-surface microstructural distortion and grain size gradients that were attributed to surface finishing operations during manufacture. The characteristics of oxide surface layers and micro-cracks on the tested bearing surfaces were evaluated and found to depend on lubrication conditions.
C1 Timken Co, Canton, OH 44706 USA.
Case Western Reserve Univ, Cleveland, OH 44106 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Evans, RD (reprint author), Timken Co, Canton, OH 44706 USA.
RI More, Karren/A-8097-2016;
OI More, Karren/0000-0001-5223-9097; Evans, Ryan/0000-0003-4549-8247
NR 42
TC 12
Z9 12
U1 0
U2 7
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 1040-2004
J9 TRIBOL T
JI Tribol. Trans.
PD JUL-SEP
PY 2004
VL 47
IS 3
BP 430
EP 439
PG 10
WC Engineering, Mechanical
SC Engineering
GA 844MH
UT WOS:000223161900015
ER
PT J
AU Thompson, GB
Miller, MK
Fraser, HL
AF Thompson, GB
Miller, MK
Fraser, HL
TI Some aspects of atom probe specimen preparation and analysis of thin
film materials
SO ULTRAMICROSCOPY
LA English
DT Article
ID TRANSMISSION ELECTRON-MICROSCOPY; TITANIUM/ALUMINUM MULTILAYERS;
PHASE-STABILITY; TITANIUM; GROWTH; SI
AB Some of the factors in the preparation of atom probe specimens of metallic multilayer thin films have been investigated. A series of Ti/Nb multilayer films were sputtered deposited on n-doped Si [0 0 1] substrates with either 5 or 0.05 Omega cm resistivity. Each wafer was pre-fabricated into a series of 5 mum x 5 mum x approximate to 80 mum island posts by photolithography and reactive ion etching. Once the film was grown on the wafer, a Si post was mounted to either a tungsten or stainless steel fine tip needle that was mechanically crimped to a Cu tube for handling. The specimen was then loaded into a Focus Ion Beam instrument where a sacrificial Pt cap was in situ deposited onto the surface of the film and subsequently annularly ion milled into the appropriate geometry. The Pt cap was found to be an effective method in reducing Ga ion damage and implantation into the film during milling. The multilayers deposited on the high resistivity Si exhibited uncontrolled field evaporation which lead to high mass tails in the mass spectra, a reduction in the mass resolution, high background noise, propensity for "flash-failure", and a variation in the apparent layer thickness as the experiment elapsed in time. The multilayers deposited on lower resistivity Si did not suffer from these artifacts. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ Alabama, Dept Met & Mat Engn, Tuscaloosa, AL 35487 USA.
Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA.
Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA.
RP Thompson, GB (reprint author), Univ Alabama, Dept Met & Mat Engn, A129 Bevill Bldg,POB 87020, Tuscaloosa, AL 35487 USA.
EM gthompson@coe.eng.ua.edu
NR 28
TC 51
Z9 53
U1 3
U2 17
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3991
J9 ULTRAMICROSCOPY
JI Ultramicroscopy
PD JUL
PY 2004
VL 100
IS 1-2
BP 25
EP 34
DI 10.1016/j.ultramic.2004.01.010
PG 10
WC Microscopy
SC Microscopy
GA 838MD
UT WOS:000222716500004
PM 15219690
ER
PT J
AU Lerotic, M
Jacobsen, C
Schafer, T
Vogt, S
AF Lerotic, M
Jacobsen, C
Schafer, T
Vogt, S
TI Cluster analysis of soft X-ray spectromicroscopy data
SO ULTRAMICROSCOPY
LA English
DT Article
DE X-ray microscopy; X-ray spectromicroscopy; principal component analysis;
cluster analysis
ID SPECTROSCOPY; MICROSCOPE; INSTRUMENTATION; SEQUENCES; SPECTRA; IMAGES
AB Soft X-ray spectromicroscopy provides spectral data on the chemical speciation of light elements at sub-100 nm spatial resolution. When all chemical species in a specimen are known and separately characterized, existing approaches can be used to measure the concentration of each component at each pixel. In other cases (such as often occur in biology or environmental science), some spectral signatures may not be known in advance so other approaches must be used. We describe here an approach that uses principal component analysis to orthogonalize and noise-filter spectromicroscopy data. We then use cluster analysis (a form of unsupervised pattern matching) to classify pixels according to spectral similarity, to extract representative, cluster-averaged spectra with good signal-to-noise ratio, and to obtain gradations of concentration of these representative spectra at each pixel. The method is illustrated with a simulated data set of organic compounds, and a mixture of lutetium in hematite used to understand colloidal transport properties of radionuclides. (C) 2004 Elsevier B.V. All rights reserved.
C1 SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
Forschungszentrum Karlsruhe, INE, D-76021 Karlsruhe, Germany.
Argonne Natl Lab, Argonne, IL 60439 USA.
RP Lerotic, M (reprint author), SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
EM lerotic@xray1.physics.sunysb.edu
RI Schafer, Thorsten /A-1258-2010; Jacobsen, Chris/E-2827-2015; Vogt,
Stefan/B-9547-2009; Vogt, Stefan/J-7937-2013
OI Schafer, Thorsten /0000-0002-7133-8717; Jacobsen,
Chris/0000-0001-8562-0353; Vogt, Stefan/0000-0002-8034-5513; Vogt,
Stefan/0000-0002-8034-5513
FU NIBIB NIH HHS [R01 EB00479-01A1]
NR 31
TC 108
Z9 108
U1 1
U2 23
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3991
J9 ULTRAMICROSCOPY
JI Ultramicroscopy
PD JUL
PY 2004
VL 100
IS 1-2
BP 35
EP 57
DI 10.1016/j.ultramic.2004.01.008
PG 23
WC Microscopy
SC Microscopy
GA 838MD
UT WOS:000222716500005
PM 15219691
ER
PT J
AU Paredes, AM
Ferreira, D
Horton, M
Saad, A
Tsuruta, H
Johnston, R
Klimstra, W
Ryman, K
Hernandez, R
Chiu, W
Brown, DT
AF Paredes, AM
Ferreira, D
Horton, M
Saad, A
Tsuruta, H
Johnston, R
Klimstra, W
Ryman, K
Hernandez, R
Chiu, W
Brown, DT
TI Conformational changes in Sindbis virions resulting from exposure to low
pH and interactions with cells suggest that cell penetration may occur
at the cell surface in the absence of membrane fusion
SO VIROLOGY
LA English
DT Article
DE Sindbis virus; electron cryo-microscopy; pH conditions; structure;
infection; membrane fusion
ID SEMLIKI-FOREST-VIRUS; PROTEIN-PROTEIN INTERACTIONS; CULTURED MOSQUITO
CELLS; PLASMA-MEMBRANE; DISULFIDE BONDS; ENCEPHALITIS-VIRUS;
GLYCOPROTEIN SHELL; AEDES-ALBOPICTUS; INFLUENZA-VIRUS; SPIKE PROTEIN
AB Alphaviruses have the ability to induce cell-cell fusion after exposure to acid pH. This observation has served as an article of proof that these membrane-containing viruses infect cells by fusion of the virus membrane with a host cell membrane upon exposure to acid pH after incorporation into a cell endosome. We have investigated the requirements for the induction of virus-mediated, low pH-induced cell-cell fusion and cell-virus fusion. We have correlated the pH requirements for this process to structural changes they produce in the virus by electron cryo-microscopy. We found that exposure to acid pH was required to establish conditions for membrane fusion but that membrane fusion did not occur until return to neutral pH. Electron cryo-microscopy revealed dramatic changes in the structure of the virion as it was moved to acid pH and then returned to neutral pH. None of these treatments resulted in the disassembly of the virus protein icosahedral shell that is a requisite for the process of virus membrane-cell membrane fusion. The appearance of a prominent protruding structure upon exposure to acid pH and its disappearance upon return to neutral pH suggested that the production of a "pore"-like structure at the fivefold axis may facilitate cell penetration as has been proposed for polio (J. Virol. 74 (2000) 1342) and human rhino virus (Mol. Cell 10 (2002) 317). This transient structural change also provided an explanation for how membrane fusion occurs after return to neutral pH. Examination of virus-cell complexes at neutral pH supported the contention that infection occurs at the cell surface at neutral pH by the production of a virus structure that breaches the plasma membrane bilayer. These data suggest an alternative route of infection for Sindbis virus that occurs by a process that does not involve membrane fusion and does not require disassembly of the virus protein shell. (C) 2004 Elsevier Inc. All rights reserved.
C1 N Carolina State Univ, Dept Mol & Struct Biochem, Raleigh, NC 27695 USA.
Baylor Coll Med, Natl Ctr Macromol Imaging, Verna & Marrs Mclean Dept Biochem & Mol Biol, Houston, TX 77030 USA.
Stanford Univ, SLAC M569, SSRL, Menlo Pk, CA 94025 USA.
Univ N Carolina, Dept Microbiol & Immunol, Chapel Hill, NC 27599 USA.
RP Brown, DT (reprint author), N Carolina State Univ, Dept Mol & Struct Biochem, Campus Box 7622, Raleigh, NC 27695 USA.
EM dennis_brown@ncsu.edu
NR 59
TC 54
Z9 56
U1 1
U2 5
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0042-6822
J9 VIROLOGY
JI Virology
PD JUL 1
PY 2004
VL 324
IS 2
BP 373
EP 386
DI 10.1016/j.virus.2004.03.046
PG 14
WC Virology
SC Virology
GA 833YE
UT WOS:000222376800012
PM 15207623
ER
PT J
AU Sun, X
Khaleel, MA
AF Sun, X
Khaleel, MA
TI Resistance spot welding of aluminum alloy to steel with transition
material - Part II: Finite element analyses of nugget growth
SO WELDING JOURNAL
LA English
DT Article
DE welding process simulation; finite element analysis; resistance spot
welding; dissimilar metals joining; aluminum alloy; transition material;
aluminum-clad steel; nugget growth
AB This paper summarizes work on finite element modeling of nugget growth for resistance spot welding of aluminum alloy to steel. It is a sequel to a previous paper on experimental studies of resistance spot welding of aluminum to steel using a transition material. Since aluminum alloys and steel cannot be readily fusion welded together due to their drastically different thermal physical properties, a cold-rolled clad material was introduced as a transition to aid the resistance welding process. Coupled electrical-thermal-mechanical finite element analyses were performed to simulate the nugget growth and heat generation patterns during the welding process. The predicted nugget growth results were compared to the experimental weld cross sections. Reasonable comparisons of nugget size were achieved. The finite element simulation procedures were also used in the electrode selection stage to help reduce weld expulsion and improve weld quality.
C1 Battelle Mem Inst, Columbus, OH 43201 USA.
Pacific NW Natl Lab, Richland, WA USA.
RP Sun, X (reprint author), Battelle Mem Inst, 505 King Ave, Columbus, OH 43201 USA.
NR 16
TC 5
Z9 6
U1 1
U2 5
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 JUL
PY 2004
VL 83
IS 7
BP 197S
EP 202S
PG 6
WC Metallurgy & Metallurgical Engineering
SC Metallurgy & Metallurgical Engineering
GA 833HR
UT WOS:000222328300010
ER
PT J
AU Lobitz, DW
AF Lobitz, DW
TI Aeroelastic stability predictions for a MW-sized blade
SO WIND ENERGY
LA English
DT Article
DE twist coupling; aeroelastic tailoring; instability; classical flutter
AB Classical aeroelastic flutter instability historically has not been a driving issue in wind turbine design. In fact, rarely has this issue even been addressed in the past. Commensurately, among the wind turbines that have been built, rarely has classical flutter ever been observed. However, with the advent of larger turbines fitted with relatively softer blades, classical flutter may become a more important design consideration. In addition, innovative blade designs involving the use of aeroelastic tailoring, wherein the blade twists as it bends under the action of aerodynamic loads to shed load resulting from wind turbulence, may increase the blade's proclivity for flutter. With these considerations in mind it is prudent to revisit aeroelastic stability issues for a MW-sized blade with and without aeroelastic tailoring. Focusing on aeroelastic stability associated with the shed wake from an individual blade turning in still air, the frequency domain technique developed by Theodorsen for predicting classical flutter in fixed wing aircraft has been adapted for use with a rotor blade. Results indicate that the predicted flutter speed of a MW-sized blade is slightly greater than twice the operational speed of the rotor. When a moderate amount of aeroelastic tailoring is added to the blade, a modest decrease (12%) in the flutter speed is predicted. By comparison, for a smaller rotor with relatively stiff blades the predicted flutter speed is approximately six times the operating speed. When frequently used approximations to Theodorsen's method are implemented, drastic underpredictions result, which, while conservative, may adversely impact blade design. These underpredictions are also evident when this MW-sized blade is analysed using time domain methods. Published in 2004 by John Wiley Sons, Ltd.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Lobitz, DW (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM dwlobit@sandia.gov
NR 16
TC 33
Z9 36
U1 1
U2 13
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 1095-4244
J9 WIND ENERGY
JI Wind Energy
PD JUL-SEP
PY 2004
VL 7
IS 3
BP 211
EP 224
DI 10.1002/we.120
PG 14
WC Energy & Fuels; Engineering, Mechanical
SC Energy & Fuels; Engineering
GA 852TI
UT WOS:000223778900004
ER
PT J
AU Tangler, JL
AF Tangler, JL
TI Insight into wind turbine stall and post-stall aerodynamics
SO WIND ENERGY
LA English
DT Article
DE wind turbine; performance prediction; stall; NASA ames phase VI
AB The objective of this study was to evaluate measured NASA Ames Unsteady Aerodynamic Experiment post-stall blade element data and to provide guidelines for developing an empirical approach that predicts post-stall aerofoil characteristics. Blade element data were analysed from the five radial stations of the baseline 5.03 m radius rotor. A lifting surface/prescribed wake performance prediction method was used to determine a reference angle of attack that corresponds to the measured blade element data. Using the measured normal and tangential force coefficients and estimated angle of attack, spanwise distributions of lift and drag performance characteristics were derived along with the circulation distributions. Guidelines for a new stall and post-stall model based on the measured trends in the aerofoil performance characteristics, along with flat plate theory, are proposed for predicting the peak and post-peak power. Copyright (C) 2004 John Wiley Sons, Ltd.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Tangler, JL (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM james_tangler@nrel.gov
NR 23
TC 42
Z9 42
U1 1
U2 8
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 1095-4244
J9 WIND ENERGY
JI Wind Energy
PD JUL-SEP
PY 2004
VL 7
IS 3
BP 247
EP 260
DI 10.1002/we.122
PG 14
WC Energy & Fuels; Engineering, Mechanical
SC Energy & Fuels; Engineering
GA 852TI
UT WOS:000223778900006
ER
PT J
AU Kelley, SS
Rials, TG
Snell, R
Groom, LH
Sluiter, A
AF Kelley, SS
Rials, TG
Snell, R
Groom, LH
Sluiter, A
TI Use of near infrared spectroscopy to measure the chemical and mechanical
properties of solid wood
SO WOOD SCIENCE AND TECHNOLOGY
LA English
DT Article
ID ORTHOGONAL SIGNAL CORRECTION; REFLECTANCE SPECTROSCOPY;
EUCALYPTUS-NITENS; PULP YIELD; CELLULOSE CONTENT; NIR-SPECTROSCOPY;
KRAFT PULPS; PREDICTION; SAMPLES; CLASSIFICATION
AB Near infrared (NIR) spectroscopy (500 nm 2400 nm), coupled with multivariate analytic (MVA) statistical techniques, have been used to predict the chemical and mechanical properties of solid loblolly pine wood. The samples were selected from different radial locations and heights of three loblolly pine trees grown in Arkansas. The chemical composition and mechanical properties were measured with traditional wet chemical techniques and three point bending tests, respectively. The microfibril angle was measured with x-ray scattering. These chemical and mechanical properties were correlated with the NIR spectra using projection to latent structures (PLS) models. The correlations were very strong, with the correlation coefficients generally above 0.80. The mechanical properties could also be predicted using a reduced spectral range (650 nm-1150 nm) that should allow for field measurements of these properties using handheld NIR spectrometers.
C1 Natl Bioenergy Ctr, Natl Renewable Energy Lab, Golden, CO 80401 USA.
USFS, So Res Stn, Pineville, LA 71360 USA.
Univ Tennessee, Forest Prod Ctr, Knoxville, TN 37996 USA.
RP Kelley, SS (reprint author), Natl Bioenergy Ctr, Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM stephen_kelley@nrel.gov
NR 37
TC 139
Z9 155
U1 3
U2 25
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 0043-7719
J9 WOOD SCI TECHNOL
JI Wood Sci. Technol.
PD JUL
PY 2004
VL 38
IS 4
BP 257
EP 276
DI 10.1007/s00226-003-0213-5
PG 20
WC Forestry; Materials Science, Paper & Wood
SC Forestry; Materials Science
GA 844QD
UT WOS:000223173800002
ER
PT J
AU Gillett, NP
Weaver, AJ
Zwiers, FW
Wehner, MF
AF Gillett, NP
Weaver, AJ
Zwiers, FW
Wehner, MF
TI Detection of volcanic influence on global precipitation
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID HYDROLOGICAL CYCLES; LAND PRECIPITATION; CLIMATE; 20TH-CENTURY;
SIMULATIONS; VARIABILITY; TEMPERATURE; SENSITIVITY; SIGNAL
AB Observations of terrestrial precipitation from the latter half of the 20th century are compared with precipitation simulated by the Parallel Climate Model to determine which external forcings have had a detectable influence on precipitation. Consistent with a previous study using another model, we found that the global mean response to all forcings combined was significantly correlated with that observed. A detection and attribution analysis applied to the simulated and observed precipitation indicated that the volcanic signal is detectable both on its own and in a multiple regression with other forcings. These results are consistent with the hypothesis that shortwave forcings exert a larger influence on precipitation than longwave forcings.
C1 Univ Victoria, Sch Earth & Ocean Sci, Victoria, BC V8W 3P6, Canada.
Univ Victoria, Meteorol Serv Canada, Canadian Ctr Climate Modelling & Anal, Victoria, BC V8W 2Y2, Canada.
Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA.
RP Gillett, NP (reprint author), Univ Victoria, Sch Earth & Ocean Sci, POB 3055, Victoria, BC V8W 3P6, Canada.
EM gillett@uvic.ca; weaver@uvic.ca; francis.zwiers@ec.gc.ca;
mfwehner@lbl.gov
RI Weaver, Andrew/E-7590-2011
NR 21
TC 355
Z9 359
U1 8
U2 17
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 JUN 30
PY 2004
VL 31
IS 12
AR L12217
DI 10.1029/2004GL020044
PG 4
WC Geosciences, Multidisciplinary
SC Geology
GA 839JG
UT WOS:000222779500005
ER
PT J
AU Lu, RY
Dong, BW
Cess, RD
Potter, GL
AF Lu, RY
Dong, BW
Cess, RD
Potter, GL
TI The 1997/98 El Nino: A test for climate models
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID BUDGET
AB Version 3 of the Hadley Centre Atmospheric Model (HadAM3) has been used to demonstrate one means of comparing a general circulation model with observations for a specific climate perturbation, namely the strong 1997/98 El Nino. This event was characterized by the collapse of the tropical Pacific's Walker circulation, caused by the lack of a zonal sea surface temperature gradient during the El Nino. Relative to normal years, cloud altitudes were lower in the western portion of the Pacific and higher in the eastern portion. HadAM3 likewise produced the observed collapse of the Walker circulation, and it did a reasonable job of reproducing the west/east cloud structure changes. This illustrates that the 1997/98 El Nino serves as a useful means of testing cloud-climate interactions in climate models.
C1 Chinese Acad Sci, Inst Atmospher Phys, Beijing 10080, Peoples R China.
Met Off, Hadley Ctr Climate Predict & Res, Exeter EX1 3PB, Devon, England.
SUNY Stony Brook, Marine Sci Res Ctr, Stony Brook, NY 11790 USA.
Lawrence Livermore Natl Lab, Program Climate Model Diag & Intercomparison, Livermore, CA 94550 USA.
RP Lu, RY (reprint author), Chinese Acad Sci, Inst Atmospher Phys, Beijing 10080, Peoples R China.
EM rcess@notes.cc.sunysb.edu
NR 13
TC 13
Z9 15
U1 0
U2 1
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 JUN 30
PY 2004
VL 31
IS 12
AR L12216
DI 10.1029/2004GL019956
PG 4
WC Geosciences, Multidisciplinary
SC Geology
GA 839JG
UT WOS:000222779500004
ER
PT J
AU Dimopoulos, S
Kachru, S
Kaloper, N
Lawrence, A
Silverstein, E
AF Dimopoulos, S
Kachru, S
Kaloper, N
Lawrence, A
Silverstein, E
TI Generating small numbers by tunneling in multi-throat compactifications
SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A
LA English
DT Article
DE AdS/CFT correspondence; braneworlds; string phenomenology
ID GAUGED EXTENDED SUPERGRAVITY; CONFORMAL FIELD-THEORIES; SUPERSYMMETRY
BREAKING; STRING THEORY; EXTRA DIMENSION; ORBIFOLDS; MODELS; SCALE;
UNIFICATION; ABSORPTION
AB A generic F-theory compactification containing many D3 branes develops multiple brane throats. The interaction of observers residing inside different throats involves tunneling suppression and as a result, is very weak. This suggests a new mechanism for generating small numbers in Nature. One application is to the hierarchy problem: large supersymmetry breaking near the unification scale inside a shallow throat causes TeV-scale SUSY-breaking inside the standard-model throat. Another application, inspired by nuclear-decay, is in designing naturally long-lived particles: a cold dark matter particle residing near the standard model brane decays to an approximate CFT-state of a longer throat within a Hubble time. This suggests that most of the mass of the universe today could consist of CFT-rnatter and may soften structure formation at sub-galactic scales. The tunneling calculation demonstrates that the coupling between two throats is dominated by higher dimensional modes and consequently is much larger than a naive application of holography might suggest.
C1 Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
Stanford Univ, SLAC, Stanford, CA 94305 USA.
Univ Calif Santa Barbara, Inst Theoret Phys, Santa Barbara, CA 93106 USA.
RP Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
EM kaloper@physics.ucdavis.edu
OI Lawrence, Albion/0000-0003-4116-045X
NR 82
TC 39
Z9 39
U1 0
U2 0
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 JUN 30
PY 2004
VL 19
IS 16
BP 2657
EP 2704
DI 10.1142/S0217751X04018075
PG 48
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 843NX
UT WOS:000223091700003
ER
PT J
AU Pranevicius, L
Milcius, D
Pranevicius, LL
Thomas, G
AF Pranevicius, L
Milcius, D
Pranevicius, LL
Thomas, G
TI Plasma hydrogenation of Al, Mg and MgAl films under high-flux ion
irradiation at elevated temperature
SO JOURNAL OF ALLOYS AND COMPOUNDS
LA English
DT Article
DE thin films; hydrogen storage material; vapour deposition; X-ray
diffraction
ID THIN-FILMS; IMPLANTATION; TITANIUM; ALUMINUM; STORAGE; PERMEATION;
DIFFUSION; IRON
AB The behaviors of hydrogen in Al, Mg and MgAl thin films on stainless steel substrate were investigated in this work. The hydrogen ions extracted from plasma were used to load hydrogen into the film material. Glow discharge optical emission spectroscopy (GDOES) was applied to obtain the hydrogen depth profiles in Al films versus hydriding parameters. The MgH2, AlH2 and Mg(AlH4)(2) hydrides were identified in plasma hydrided films using X-ray diffraction (XRD). The results provide new aspects of hydriding of thin films under highly non-equilibrium conditions on the surface supported by high-flux ion irradiation. (C) 2003 Elsevier B.V. All rights reserved.
C1 Vytautas Magnus Univ, Dept Phys, LT-3035 Kaunas, Lithuania.
Lithuanian Energy Inst, Surface Treatment Lab, LT-3035 Kaunas, Lithuania.
Sandia Natl Labs, Reno, NV 89511 USA.
RP Pranevicius, L (reprint author), Vytautas Magnus Univ, Dept Phys, 8 Vileikos St, LT-3035 Kaunas, Lithuania.
EM liudvikas_pranevicius@fc.vdu.lt
NR 17
TC 22
Z9 22
U1 0
U2 9
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 JUN 30
PY 2004
VL 373
IS 1-2
BP 9
EP 15
DI 10.1016/j.jallcom.2003.10.029
PG 7
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA 826VR
UT WOS:000221858100005
ER
PT J
AU Deng, DW
Kuo, KH
Luo, ZP
Miller, DJ
Kramer, MJ
Dennis, KW
AF Deng, DW
Kuo, KH
Luo, ZP
Miller, DJ
Kramer, MJ
Dennis, KW
TI Crystal structure of the hexagonal Zn3MgY phase
SO JOURNAL OF ALLOYS AND COMPOUNDS
LA English
DT Article
DE Zn-Mg-Y; crystalline approximant; structure
ID QUASI-CRYSTALS; ALLOYS; SYSTEM
AB The crystal structure of the hexagonal Zn3MgY Phase has been determined by single-crystal X-ray diffraction. The structural model, refined to a final R value of 0.047, has the composition Zn60.68Mg18.28Y21.04. a = 9.082(2) Angstrom and c = 9.415(5) Angstrom and the space group P6(3)/mmc. Among the 36 atomic sites 28 (or 77.8%) are icosahedrally coordinated (heavily distorted by the large Y atoms) and occupied by Zn and Mg (not all) atoms. As the interatomic distance between the centers of a pair of icosahedra increases from 2.6 to 3.1 Angstrom, 4.7 to 4.8 Angstrom, to 6.4 Angstrom, their connection changes from interpenetration, face-sharing, to vertex-sharing. The structure of Zn3MgY is characterized by a layer structure consisting of FP(FP)' layers stacked along the c axis, where F and P denote flat and puckered layers, respectively, and (FP)' is related to FP by a 6(3) screw. The Zn3 icosahedra, in the PFP' layer block, are fused into pairs in the <100> directions. On the other hand the Zn 1, Zn2, and Mg/Zn icosahedra form vertex-sharing, face-sharing, or interpenetrated chains in the [001] direction. (C) 2003 Elsevier B.V. All rights reserved.
C1 Dalian Univ Technol, Dept Mat Engn, Dalian 116024, Peoples R China.
Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA.
Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
Texas A&M Univ, Microscopy & Imaging Ctr, College Stn, TX 77843 USA.
Chinese Acad Sci, Inst Phys, Beijing Lab Electron Microscopy, Beijing 100080, Peoples R China.
RP Deng, DW (reprint author), Dalian Univ Technol, Dept Mat Engn, Dalian 116024, Peoples R China.
EM dwdeng@blem.ac.cn
RI Luo, Zhiping/C-4435-2014
OI Luo, Zhiping/0000-0002-8264-6424
NR 17
TC 17
Z9 19
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 JUN 30
PY 2004
VL 373
IS 1-2
BP 156
EP 160
DI 10.1016/j.jallcom.2003.10.039
PG 5
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA 826VR
UT WOS:000221858100026
ER
PT J
AU Brown, LR
Nikitin, A
Benner, DC
Devi, VM
Smith, MAH
Fejard, L
Champion, JP
Tyuterev, VG
Sams, RL
AF Brown, LR
Nikitin, A
Benner, DC
Devi, VM
Smith, MAH
Fejard, L
Champion, JP
Tyuterev, VG
Sams, RL
TI Line intensities of CH3D in the Triad region: 6-10 mu m
SO JOURNAL OF MOLECULAR STRUCTURE
LA English
DT Article
DE monodeuterated methane; CH3D Triad; fundamentals; hotbands; intensities
ID PERTURBATION-ALLOWED TRANSITIONS; DIODE-LASER MEASUREMENTS;
INFRARED-SPECTRUM; ABSORPTION INTENSITIES; POLYATOMIC-MOLECULES;
ROTATIONAL ANALYSIS; GROUND-STATE; HALF-WIDTHS; (CH3D)-C-12; METHANE
AB Line intensities of the three lowest fundamentals of the (CH3D)-C-12 Triad are modeled with an RMS of 3.2% using over 2 100 observed values retrieved by multispectrurn fitting of enriched sample spectra recorded with two Fourier transform spectrometers. The band strengths of the Triad in units of 10(-18) cm(-1)/(molecule cm(-2)) at 296 K are, respectively, 2.33 for v(6) (E) at 1161 cm(-1), 1.75 for v(3) (A(1)) at 1307 cm(-1) and 0.571 for v(5) (E) at 1472 cm(-1). The total calculated absorption arising from (CH3D)-C-12 Triad fundamentals is 4.65 x 10(-18) cm(-1)/(molecule cm-2) at 296 K. In addition. some 740 intensities of nine hotbands are fitted to 8.1%; most of the hotband measurements belong to 2v(6) - v(6) and v(3) + v(6) - v(3) near 1160 cm(-1) 2(v)3 - v(3) near 1290 cm(-1) and v(3) + v(6) - v(6) near 1304 cm(-1). The other observed hotbands are v(5) + v(6) - v(6), 2v(5) - v(5), v(5) + v(6) - v(5), v(3) + v(5) - v(3), and v(3) + v(5) - v(5). (C) 2004 Elsevier B.V. All rights reserved.
C1 CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
Russian Acad Sci, Inst Atmospher Opt, Lab Theoret Spect, Tomsk 634055, Russia.
Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA.
NASA, Langley Res Ctr, Hampton, VA 23681 USA.
Univ Bourgogne, CNRS, Phys Lab, F-21078 Dijon, France.
Fac Sci, UMR CNRS 6089, Grp Spectrometrie Mol & Atmospher, F-56187 Reims 2, France.
Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Brown, LR (reprint author), CALTECH, Jet Prop Lab, MS 183-601,4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM linda.brown@jpl.nasa.gov
RI Champion, Jean-Paul/C-3963-2009; Nikitin, Andrei/K-2624-2013
OI Nikitin, Andrei/0000-0002-4280-4096
NR 38
TC 11
Z9 11
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-2860
J9 J MOL STRUCT
JI J. Mol. Struct.
PD JUN 30
PY 2004
VL 695
SI SI
BP 181
EP 188
DI 10.1016/j.molstruc.2003.12.041
PG 8
WC Chemistry, Physical
SC Chemistry
GA 827SV
UT WOS:000221922000017
ER
PT J
AU Vaitheeswaran, G
Petit, L
Svane, A
Kanchana, V
Rajagopalan, M
AF Vaitheeswaran, G
Petit, L
Svane, A
Kanchana, V
Rajagopalan, M
TI Electronic structure of praseodymium monopnictides and monochalcogenides
under pressure
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID NACL-TYPE STRUCTURE; PHASE-TRANSITIONS; CERIUM; CHALCOGENIDES;
LANTHANIDE; SI; LN; PR
AB The electronic structure of the praseodymium monopnictides and monochalcogenides is studied using the self-interaction corrected (SIC) local spin density (LSD) approximation. This method allows for a description of the Pr ions with some f electrons localized in atomic like orbitals, while other f degrees of freedom are forming hybridized bands. In this way different valency configurations of the Pr ion may be compared. The ground state configuration is obtained from the global energy minimum. With trivalent Pr ions, corresponding to two localized f electrons per Pr ion, the experimental lattice constants and bulk moduli of all these compounds are well reproduced. In contrast, the conventional LSD band treatment of the Pr pnictides and chalcogenides yields too small lattice constants. With applied pressure, the Pr monopnictides and monochalcogenides undergo simple B1 to B2 structural transitions which are well reproduced by the present theory without destabilization of the localized f(2) shells.
C1 Anna Univ, Dept Phys, Madras 600025, Tamil Nadu, India.
Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA.
Oak Ridge Natl Lab, Ctr Computat Sci, Oak Ridge, TN 37831 USA.
Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark.
RP Vaitheeswaran, G (reprint author), Anna Univ, Dept Phys, Madras 600025, Tamil Nadu, India.
EM g.s.vaithee@fkf.mpg.de
RI Petit, Leon/B-5255-2008;
OI Petit, Leon/0000-0001-6489-9922
NR 31
TC 30
Z9 30
U1 1
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD JUN 30
PY 2004
VL 16
IS 25
BP 4429
EP 4440
AR PII S0953-8984(04)79293-0
DI 10.1088/0953-8984/16/25/004
PG 12
WC Physics, Condensed Matter
SC Physics
GA 841SV
UT WOS:000222952800007
ER
PT J
AU Bussmann-Holder, A
Bishop, AR
AF Bussmann-Holder, A
Bishop, AR
TI Intrinsic local modes and heterogeneity in relaxor ferroelectrics
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID POLARIZATION DISTRIBUTION; PHASE-TRANSITIONS; LATTICE-DYNAMICS;
BEHAVIOR; CRYSTALS; GLASSES; ORIGIN; ORDER
AB We suggest that ferroelectric relaxor glasses represent an important class of materials in which intrinsic spatial heterogeneity and multiscale dynamics can arise from the formation of local modes due to inherent nonlinearity in the polarizable medium. Specifically, the phenomenology of relaxor ferroelectrics in terms of the spherical random bond-random field (Blinc et al 1999 Phys. Rev. Lett. 83 424) model is explained microscopically by the formation of discrete breathers embedded in a soft but silent medium, which form in-gap local modes (IGLM) where charge and lattice are intrinsically coupled. Complete mode softening is inhibited by the IGLM and soft elasticity a prerequisite for their existence.
C1 Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany.
Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Bussmann-Holder, A (reprint author), Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany.
NR 27
TC 14
Z9 14
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD JUN 30
PY 2004
VL 16
IS 25
BP L313
EP L320
AR PII S0953-8984(04)79269-3
DI 10.1088/0953-8984/16/25/L02
PG 8
WC Physics, Condensed Matter
SC Physics
GA 841SV
UT WOS:000222952800002
ER
PT J
AU Chen, HB
Sholl, DS
AF Chen, HB
Sholl, DS
TI Rapid diffusion of CH4/H-2 mixtures in single-walk carbon nanotubes
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID MOLECULAR-DIFFUSION; SIMULATIONS; ZEOLITES; CF4; TRANSPORT; FAUJASITE;
MEMBRANES; DYNAMICS; FLOW; CH4
C1 Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA.
Natl Energy & Technol Lab, Pittsburgh, PA 15236 USA.
RP Sholl, DS (reprint author), Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA.
EM sholl@andrew.cmu.edu
RI Garcia-Sanchez, Almudena/B-3303-2009
NR 26
TC 94
Z9 96
U1 4
U2 23
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 JUN 30
PY 2004
VL 126
IS 25
BP 7778
EP 7779
DI 10.1021/ja039462d
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA 831SY
UT WOS:000222217600024
PM 15212516
ER
PT J
AU Hay, BP
Gutowski, M
Dixon, DA
Garza, J
Vargas, R
Moyer, BA
AF Hay, BP
Gutowski, M
Dixon, DA
Garza, J
Vargas, R
Moyer, BA
TI Structural criteria for the rational design of selective ligands:
Convergent hydrogen bonding sites for the nitrate anion
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Review
ID CENTER-DOT-O=C; MOLECULAR WAVE-FUNCTIONS; CRYSTAL-STRUCTURE; BASIS-SETS;
AB-INITIO; ACCEPTOR DIRECTIONALITY; COORDINATION CHEMISTRY; RECOGNITION
PROPERTIES; BENCHMARK CALCULATIONS; SYNTHETIC RECEPTORS
AB A large number of crystal structures are analyzed to characterize the structural aspects of hydrogen bonding interactions with the NO(3)(-) anion. Further insight is provided by the use of electronic structure calculations to determine stable geometries and interaction energies for NO(3)(-) complexes with several simple hydrogen bond donor groups, including water, methanol, N-methylform-amide, and methane. The results establish the existence of a clear set of structural criteria for the rational design of molecular receptors that complex the NO(3)(-) anion through hydrogen bonding interactions.
C1 Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA.
Univ Alabama, Dept Chem, Tuscaloosa, AL 35487 USA.
Univ Autonoma Metropolitana Iztapalapa, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, Mexico.
Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Hay, BP (reprint author), Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA.
EM ben.hay@pnl.gov
RI Solominow, Sonia/A-4021-2008; Garza, Jorge/H-9395-2016; Moyer,
Bruce/L-2744-2016; Garza-Olguin, Jorge/N-3106-2016
OI Garza, Jorge/0000-0003-4249-6078; Moyer, Bruce/0000-0001-7484-6277;
Garza-Olguin, Jorge/0000-0003-4249-6078
NR 120
TC 70
Z9 70
U1 2
U2 18
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 JUN 30
PY 2004
VL 126
IS 25
BP 7925
EP 7934
DI 10.1021/ja0487980
PG 10
WC Chemistry, Multidisciplinary
SC Chemistry
GA 831SY
UT WOS:000222217600049
PM 15212541
ER
PT J
AU Zhang, Q
Dwyer, TJ
Tsui, V
Case, DA
Cho, JH
Dervan, PB
Wemmer, DE
AF Zhang, Q
Dwyer, TJ
Tsui, V
Case, DA
Cho, JH
Dervan, PB
Wemmer, DE
TI NMR structure of a cyclic polyamide-DNA complex
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID SEQUENCE-SPECIFIC RECOGNITION; DOUBLE-HELICAL DNA; COVALENT PEPTIDE
DIMERS; BY-SIDE BINDING; MINOR-GROOVE; HAIRPIN POLYAMIDE; 2-DIMENSIONAL
NMR; MATRIX ANALYSIS; NUCLEIC-ACIDS; DISTAMYCIN-A
AB The solution structure of a cyclic polyamide ligand complexed to a DNA oligomer, derived from NMR restrained molecular mechanics, is presented. The polyamide, cyclc-gamma-ImPyPy-gamma-PyPyPy*-, binds to target DNA with a nanomolar dissociation constant as characterized by quantitative footprinting previously reported. 2D H-1 NMR data were used to generate distance restraints defining the structure of this cyclic polyamide with the DNA duplex d(5'-GCCTGTTAGCG-3'):d(5'-CGCTAACAGGC-3'). Data interpretation used complete relaxation matrix analysis of the NOESY cross-peak intensities with the program MARDIGRAS. The NMR-based distance restraints (276 total) were applied in restrained molecular dynamics calculations using a solvent model, yielding structures with an rmsd for the ligand and binding site of similar to1 A. The resulting structures indicate some distortion of the DNA in the binding site. The constraints from cyclization lead to altered stacking of the rings in the halves of the cyclic ligand relative to unlinked complexes. Despite this, the interactions with DNA are very similar to what has been found in unlinked complexes. Measurements of ligand amide and DNA imino proton exchange rates indicate very slow dissociation of the ligand and show that the DNA can undergo opening fluctuations while the ligand is bound although the presence of the ligand decreases their frequency relative to the free DNA.
C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
Univ San Diego, Dept Chem, San Diego, CA 92110 USA.
Scripps Res Inst, Dept Mol Biol, La Jolla, CA 92037 USA.
CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA.
RP Wemmer, DE (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM dewemmer@lbl.gov
FU NIGMS NIH HHS [F33 GM63420, GM27681, GM43129, GM45811]
NR 43
TC 32
Z9 35
U1 1
U2 3
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 JUN 30
PY 2004
VL 126
IS 25
BP 7958
EP 7966
DI 10.1021/ja0373622
PG 9
WC Chemistry, Multidisciplinary
SC Chemistry
GA 831SY
UT WOS:000222217600053
PM 15212545
ER
PT J
AU Faybishenko, B
AF Faybishenko, B
TI Nonlinear dynamics in flow through unsaturated fractured porous media:
Status and perspectives
SO REVIEWS OF GEOPHYSICS
LA English
DT Review
DE nonlinear dynamics; chaos; unsaturated flow; fractured rock
ID WETTING FRONT INSTABILITY; BASALT VADOSE ZONE; SOIL-MOISTURE;
LIQUID-FILM; WATER-FLOW; FLUID-FLOW; LABORATORY EXPERIMENTS; STRANGE
ATTRACTORS; SELF-ORGANIZATION; SOLUTE TRANSPORT
AB [ 1] The need has long been recognized to improve predictions of flow and transport in partially saturated heterogeneous soils and fractured rock of the vadose zone for many practical applications, such as remediation of contaminated sites, nuclear waste disposal in geological formations, and climate predictions. Until recently, flow and transport processes in heterogeneous subsurface media with oscillating irregularities were assumed to be random and were not analyzed using methods of nonlinear dynamics. The goals of this paper are to review the theoretical concepts, present the results, and provide perspectives on investigations of flow and transport in unsaturated heterogeneous soils and fractured rock, using the methods of nonlinear dynamics and deterministic chaos. The results of laboratory and field investigations indicate that the nonlinear dynamics of flow and transport processes in unsaturated soils and fractured rocks arise from the dynamic feedback and competition between various nonlinear physical processes along with complex geometry of flow paths. Although direct measurements of variables characterizing the individual flow processes are not technically feasible, their cumulative effect can be characterized by analyzing time series data using the models and methods of nonlinear dynamics and chaos. Identifying flow through soil or rock as a nonlinear dynamical system is important for developing appropriate short- and long-time predictive models, evaluating prediction uncertainty, assessing the spatial distribution of flow characteristics from time series data, and improving chemical transport simulations. Inferring the nature of flow processes through the methods of nonlinear dynamics could become widely used in different areas of the earth sciences.
C1 Ernest Orlando Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Faybishenko, B (reprint author), Ernest Orlando Lawrence Berkeley Natl Lab, Div Earth Sci, 1 Cyclotron Rd,Lib Bldg 50B, Berkeley, CA 94720 USA.
EM bfayb@lbl.gov
RI Faybishenko, Boris/G-3363-2015
OI Faybishenko, Boris/0000-0003-0085-8499
NR 167
TC 10
Z9 10
U1 1
U2 16
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 8755-1209
J9 REV GEOPHYS
JI Rev. Geophys.
PD JUN 30
PY 2004
VL 42
IS 2
AR RG2003
DI 10.1029/2003RG000125
PG 30
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 839OJ
UT WOS:000222794100001
ER
PT J
AU Carrado, KA
Macha, SM
Tiede, DM
AF Carrado, KA
Macha, SM
Tiede, DM
TI Effects of surface functionalization and organo-tailoring of synthetic
layer silicates on the immobilization of cytochrome c
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID MESOPOROUS MOLECULAR-SIEVES; CLAY-MODIFIED ELECTRODES; SOL-GEL
MATERIALS; ENZYMATIC-ACTIVITY; DIRECT ELECTROCHEMISTRY; CATALYTIC
ACTIVITY; LAPONITE; ENZYMES; PROTEINS; CRYSTALLIZATION
AB The utility of various synthetic hectorites for the preparation of active enzyme complexes by simple adsorption processes was examined. The smectites compared include commercially available Laponite RD, mesostructured hectorites (both with and without organic template), and silane-modified mesostructured hectorite. The complexes were evaluated by the amount of cytochrome c that was incorporated and the fraction of enzyme available for redox reaction. The quantity of adsorbed cyt c was determined by optical absorption spectroscopy of the supernatant solution, yielding enzyme densities that ranged from 20 to 50 wt %. There was no correlation between weight percent loading and either the surface area or the pore volume of the clay mineral. Rather, other characteristics such as surface compatibility appear to play the major role in this regard. Immobilized enzyme conformation was examined by EPR. Qualitative information regarding protein stability and redox activity was also obtained by chemical reduction experiments. These studies revealed the effects of organo-tailoring of the inorganic surface in terms of steric hindrance of enzyme in active conformation and denaturation within a clay pore microenvironment.
C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
RP Carrado, KA (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM kcarrado@anl.gov
NR 58
TC 20
Z9 21
U1 1
U2 5
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 JUN 29
PY 2004
VL 16
IS 13
BP 2559
EP 2566
DI 10.1021/cm049877d
PG 8
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 832FJ
UT WOS:000222252300009
ER
PT J
AU Berret, JF
Vigolo, B
Eng, R
Herve, P
Grillo, I
Yang, L
AF Berret, JF
Vigolo, B
Eng, R
Herve, P
Grillo, I
Yang, L
TI Electrostatic self-assembly of oppositely charged copolymers and
surfactants: A light, neutron, and X-ray scattering study
SO MACROMOLECULES
LA English
DT Article
ID POLYION COMPLEX MICELLES; HYDROPHILIC BLOCK-COPOLYMERS; ENTRAPPING
ENZYME MOLECULES; ANTISENSE OLIGONUCLEOTIDE; DIBLOCK COPOLYMERS;
POLYELECTROLYTE; MICELLIZATION; MIXTURES; CORE; BEHAVIOR
AB We report on the formation of colloidal complexes resulting from the electrostatic self-assembly of polyelectrolyte-neutral diblock copolymers and oppositely charged surfactant. The copolymers investigated are asymmetric and characterized by a large neutral block. Using light, neutron, and X-ray scattering experiments, we have shown that the colloidal complexes exhibit a core-shell microstructure. The core is described as a dense microphase of micelles connected by the polyelectrolyte blocks, whereas the shell is a diffuse brush made from the neutral chains. For all copolymer/surfactant systems, we show the existence of a critical charge ratio Z(C) (similar to1) above which the formation of hierarchical structures takes place. Copolymers of different molecular weight and polyelectrolyte blocks have been studied in order to assess the analogy with another type of core-shell aggregates, the polymeric micelles made from amphiphilic copolymers. The present results indicate that the radius of the core depends essentially on the degree of polymerization of the polyelectrolyte block and not on that of the neutral chain. On the other hand, the size of the overall colloid increases with increasing molecular weights of the copolymers. Taking advantage of the resolution of X-ray scattering, we have also shown that the micelles in the core of the aggregates are structurally disordered.
C1 Cranbury Res Ctr Rhodia Inc, CNRS, Complex Fluids Lab, Cranbury, NJ 08512 USA.
Inst Laue Langevin, F-38042 Grenoble 9, France.
Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Berret, JF (reprint author), Cranbury Res Ctr Rhodia Inc, CNRS, Complex Fluids Lab, 259 Prospect Plains Rd, Cranbury, NJ 08512 USA.
EM jeanfrancois.berret@us.rhodia.com
RI Berret, Jean-Francois/C-3358-2013; Yang, Lin/D-5872-2013
OI Yang, Lin/0000-0003-1057-9194
NR 43
TC 79
Z9 80
U1 0
U2 23
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD JUN 29
PY 2004
VL 37
IS 13
BP 4922
EP 4930
DI 10.1021/ma0498722
PG 9
WC Polymer Science
SC Polymer Science
GA 832HR
UT WOS:000222258600025
ER
PT J
AU Mazur, PO
Mottola, E
AF Mazur, PO
Mottola, E
TI Gravitational vacuum condensate stars
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
ID CLASSICAL GENERAL-RELATIVITY; QUANTUM PHASE-TRANSITIONS; BLACK-HOLE
PHYSICS; THIN SHELLS; SECOND LAW; THERMODYNAMICS; ENTROPY;
TRANSFORMATIONS; GRAVITY
AB A new final state of gravitational collapse is proposed. By extending the concept of Bose-Einstein condensation to gravitational systems, a cold, dark, compact object with an interior de Sitter condensate p(v) = -rho(v) and an exterior Schwarzschild geometry of arbitrary total mass M is constructed. These regions are separated by a shell with a small but finite proper thickness e of fluid with equation of state p = +rho, replacing both the Schwarzschild and de Sitter classical horizons. The new solution has no singularities, no event horizons, and a global time. Its entropy is maximized under small fluctuations and is given by the standard hydrodynamic entropy of the thin shell, which is of the order k(B)lMc/h, instead of the Bekenstein-Hawking entropy formula, S-BH = 4pik(B)GM(2)/hc. Hence, unlike black holes, the new solution is thermodynamically stable and has no information paradox.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA.
RP Mottola, E (reprint author), Los Alamos Natl Lab, Div Theoret, T-8, Los Alamos, NM 87545 USA.
EM emil@lanl.gov
NR 34
TC 151
Z9 151
U1 0
U2 12
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 JUN 29
PY 2004
VL 101
IS 26
BP 9545
EP 9550
DI 10.1073/pnas.0402717101
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 834IU
UT WOS:000222405600007
PM 15210982
ER
PT J
AU Huai, Q
Wang, HC
Zhang, W
Colman, RW
Robinson, H
Ke, HM
AF Huai, Q
Wang, HC
Zhang, W
Colman, RW
Robinson, H
Ke, HM
TI Crystal structure of phosphodiesterase 9 shows orientation variation of
inhibitor 3-isobutyl-1-methylxanthine binding
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
ID CYCLIC-NUCLEOTIDE PHOSPHODIESTERASES; CGMP-SPECIFIC PHOSPHODIESTERASE;
CAMP PHOSPHODIESTERASES; SELECTIVE-INHIBITION; PDE4; FAMILY;
IDENTIFICATION; DYSFUNCTION; MECHANISM; COMPLEX
AB Cyclic nucleotide phosphodiesterases (PDEs) are enzymes controlling cellular concentrations of the second messengers cAMP and cGMP. The crystal structure of the catalytic domain of PDE9A2, a member of a PDE family specifically hydrolyzing cGMP, has been determined at 2.23-Angstrom resolution. The PDE9A2 catalytic domain closely resembles the cAMP-specific PDE4D2 but is significantly different from the cGMP-specific PDE5A1, implying that each individual PDE family has its own characteristic substrate recognition mechanism. The different conformations of the H and M loops between PDE9A2 and PDE5A1 imply their less critical roles in nucleotide recognition. The nonselective inhibitor 3-isobutyl-1-methylxanthine (IBMX) binds to a similar subpocket in the active sites of PDE4, PDE5, and PDE9 and has a common pattern of the binding. However, significantly different orientations and interactions of IBMXs are observed among the three PDE families and also between two monomers of the PDE9A2 dimer. The kinetic properties of the PDE9A2 catalytic domain similar to those of full-length PDE9A imply that the N-terminal regulatory domain does not significantly alter the catalytic activity and the IBMX inhibition.
C1 Univ N Carolina, Dept Biochem & Biophys, Chapel Hill, NC 27599 USA.
Univ N Carolina, Lineberger Comprehens Canc Ctr, Chapel Hill, NC 27599 USA.
Temple Univ, Sch Med, Sol Sherry Thrombosis Res Ctr, Philadelphia, PA 19140 USA.
Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
RP Ke, HM (reprint author), Univ N Carolina, Dept Biochem & Biophys, Chapel Hill, NC 27599 USA.
EM hke@med.unc.edu
FU NHLBI NIH HHS [P01 HL064943, P01 HL64943]; NIGMS NIH HHS [GM59791, R01
GM059791]
NR 34
TC 59
Z9 60
U1 0
U2 4
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 JUN 29
PY 2004
VL 101
IS 26
BP 9624
EP 9629
DI 10.1073/pnas.0401120101
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 834IU
UT WOS:000222405600021
PM 15210993
ER
PT J
AU Norby, RJ
Ledford, J
Reilly, CD
Miller, NE
O'Neill, EG
AF Norby, RJ
Ledford, J
Reilly, CD
Miller, NE
O'Neill, EG
TI Fine-root production dominates response of a deciduous forest to
atmospheric CO2 enrichment
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
ID ELEVATED CO2; FACE EXPERIMENTS; CARBON STORAGE; SWEETGUM STAND;
SOIL-NITROGEN; TURNOVER; DYNAMICS; SEQUESTRATION; ECOSYSTEMS; SYSTEMS
AB Fine-root production and turnover are important regulators of the biogeochemical cycles of ecosystems and key components of their response to global change. We present a nearly continuous 6-year record of fine-root production and mortality from minirhizotron analysis of a closed-canopy, deciduous sweetgum forest in a free-air CO2 enrichment experiment. Annual production of fine roots was more than doubled in plots with 550 ppm CO2 compared with plots in ambient air. This response was the primary component of the sustained 22% increase in net primary productivity. Annual fine-root mortality matched annual production, and the mean residence time of roots was not altered by elevated CO2, but peak fine-root standing crop in midsummer was significantly higher in CO2-enriched plots, especially deeper in the soil profile. The preferential allocation of additional carbon to fine roots, which have a fast turnover rate in this species, rather than to stemwood reduces the possibility of long-term enhancement by elevated CO2 of carbon sequestration in biomass. However, sequestration of some of the fine-root carbon in soil pools is not precluded, and there may be other benefits to the tree from a seasonally larger and deeper fine-root system. Root-system dynamics can explain differences among ecosystems in their response to elevated atmospheric CO2; hence, accurate assessments of carbon flux and storage in forests in a globally changing atmosphere must account for this unseen and difficult-to-measure component.
C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
Loyola Univ, Dept Biol, Chicago, IL 60626 USA.
RP Norby, RJ (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA.
EM rjn@ornl.gov
RI Norby, Richard/C-1773-2012
OI Norby, Richard/0000-0002-0238-9828
NR 33
TC 225
Z9 238
U1 6
U2 71
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 JUN 29
PY 2004
VL 101
IS 26
BP 9689
EP 9693
DI 10.1073/pnas.0403491101
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 834IU
UT WOS:000222405600032
PM 15210962
ER
PT J
AU Qiu, W
Velisavljevic, N
Baker, PA
Vohra, YK
Weir, ST
AF Qiu, W
Velisavljevic, N
Baker, PA
Vohra, YK
Weir, ST
TI Isotopically pure C-13 layer as a stress sensor in a diamond anvil cell
SO APPLIED PHYSICS LETTERS
LA English
DT Article
AB Isotopically pure C-13 homoepitaxial diamond layer of 20+/-5 microns thickness was grown on top of a brilliant cut diamond anvil by a microwave plasma chemical vapor deposition process for application as a stress sensor. This isotopically pure diamond tip was then used in conjunction with a natural abundance C-12 diamond anvil to generate high pressure on a soft sample containing carbon nanotubes to 100 GPa. The C-13 diamond Raman signal remained a distinct single peak showing that the mean normal stress experienced by this thin layer is uniform to the highest pressure. The stress-induced shift of the C-13 layer is related to the quasihydrostatic pressure in the sample chamber using a ruby pressure sensor and shows a remarkably linear behavior to extreme pressures. (C) 2004 American Institute of Physics.
C1 Univ Alabama, Dept Phys, Birmingham, AL 35294 USA.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Qiu, W (reprint author), Univ Alabama, Dept Phys, Birmingham, AL 35294 USA.
EM ykvohra@uab.edu
RI Weir, Samuel/H-5046-2012;
OI Baker, Paul/0000-0002-2875-2760
NR 5
TC 6
Z9 6
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUN 28
PY 2004
VL 84
IS 26
BP 5308
EP 5310
DI 10.1063/1.1766077
PG 3
WC Physics, Applied
SC Physics
GA 831NH
UT WOS:000222200600004
ER
PT J
AU MacManus-Driscoll, JL
Foltyn, SR
Jia, QX
Wang, H
Serquis, A
Maiorov, B
Civale, L
Lin, Y
Hawley, ME
Maley, MP
Peterson, DE
AF MacManus-Driscoll, JL
Foltyn, SR
Jia, QX
Wang, H
Serquis, A
Maiorov, B
Civale, L
Lin, Y
Hawley, ME
Maley, MP
Peterson, DE
TI Systematic enhancement of in-field critical current density with
rare-earth ion size variance in superconducting rare-earth barium
cuprate films
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID THIN-FILMS; DEPOSITION; DISORDER
AB Enhanced in-field critical current densities (J(c)'s) have been obtained in epitaxial superconducting (RE1,RE2) Ba2Cu3O7-x ( RE1=rare-earth ion 1, and RE2=rare earth ion 2) films grown on both single crystal and buffered metallic substrates. For a constant average RE ionic radius (equal to that of yttrium), there is a systematic dependence of the in-field J(c) on the RE ion size variance, with a small, but nonzero, variance being optimum. Compared to the standard YBa2Cu3O7-x composition, a factor of two improvement in J(c) (75.5 K) is reproducibly observed at 0.2 T (parallel toc) for the composition Dy1/3Ho2/3Ba2Cu3O7-x on both single crystal and buffered-metallic substrates. Angular dependent magnetic field studies and transmission electron microscopy indicate the presence of additional pointlike random defects. (C) 2004 American Institute of Physics.
C1 Los Alamos Natl Lab, Superconduct Technol Ctr, Los Alamos, NM 87545 USA.
Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England.
RP MacManus-Driscoll, JL (reprint author), Los Alamos Natl Lab, Superconduct Technol Ctr, POB 1663, Los Alamos, NM 87545 USA.
EM jld@hermes.cam.ac.uk
RI Jia, Q. X./C-5194-2008; Wang, Haiyan/P-3550-2014; Serquis,
Adriana/L-6554-2015; lin, yuan/B-9955-2013;
OI Wang, Haiyan/0000-0002-7397-1209; Serquis, Adriana/0000-0003-1499-4782;
Maiorov, Boris/0000-0003-1885-0436
NR 14
TC 86
Z9 87
U1 7
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUN 28
PY 2004
VL 84
IS 26
BP 5329
EP 5331
DI 10.1063/1.1766394
PG 3
WC Physics, Applied
SC Physics
GA 831NH
UT WOS:000222200600011
ER
PT J
AU Dong, CK
Myneni, GR
AF Dong, CK
Myneni, GR
TI Carbon nanotube electron source based ionization vacuum gauge
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID FIELD-EMISSION; EMITTERS; SURFACE
AB The results of fabrication and performance of an ionization vacuum gauge using a carbon nanotube electron source are presented. The electron source was constructed with multiwall nanotubes, which were grown using thermal chemical vapor deposition. The electron emission of the source was stable in vacuum pressure up to 10(-7) Torr, which is better than the metal field emitters. The measurement linearity of the gauge was better than +/-10% from 10(-6) to 10(-10) Torr. The gauge sensitivity of 4 Torr(-1) was achieved under 50 muA electron emission in nitrogen. The gauge is expected to find applications in vacuum measurements from 10(-7) Torr to below 10(-11) Torr. (C) 2004 American Institute of Physics.
C1 Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
Jefferson Lab, Accelerator Div, Newport News, VA 23606 USA.
RP Dong, CK (reprint author), Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
EM cdong@xintek.com
NR 21
TC 40
Z9 43
U1 0
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUN 28
PY 2004
VL 84
IS 26
BP 5443
EP 5445
DI 10.1063/1.1767956
PG 3
WC Physics, Applied
SC Physics
GA 831NH
UT WOS:000222200600049
ER
PT J
AU Wan, XF
Xu, D
Kleinhofs, A
Zhou, JZ
AF Wan, XF
Xu, D
Kleinhofs, A
Zhou, JZ
TI Quantitative relationship between synonymous codon usage bias and GC
composition across unicellular genomes
SO BMC EVOLUTIONARY BIOLOGY
LA English
DT Article
ID AMINO-ACID-COMPOSITION; ESCHERICHIA-COLI; HUMAN GENES; TRANSFER-RNAS;
G+C CONTENT; BACILLUS-SUBTILIS; RESPECTIVE CODONS; VERTEBRATE GENES;
BASE COMPOSITION; PROTEIN GENES
AB Background: Codon usage bias has been widely reported to correlate with GC composition. However, the quantitative relationship between codon usage bias and GC composition across species has not been reported.
Results: Based on an informatics method (SCUO) we developed previously using Shannon informational theory and maximum entropy theory, we investigated the quantitative relationship between codon usage bias and GC composition. The regression based on 70 bacterial and 16 archaeal genomes showed that in bacteria, SCUO = - 2.06 * GC3 + 2.05*( GC3) 2 + 0.65, r = 0.91, and that in archaea, SCUO = - 1.79 * GC3 + 1.85*( GC3) 2 + 0.56, r = 0.89. We developed an analytical model to quantify synonymous codon usage bias by GC compositions based on SCUO. The parameters within this model were inferred by inspecting the relationship between codon usage bias and GC composition across 70 bacterial and 16 archaeal genomes. We further simplified this relationship using only GC3. This simple model was supported by computational simulation.
Conclusions: The synonymous codon usage bias could be simply expressed as 1+ ( p/ 2) log(2)( p/ 2) + ((1-p)/2) log(2)(( l-p)/2), where p = GC3. The software we developed for measuring SCUO (codonO) is available at http://digbio.missouri.edu/similar towanx/cu/codonO.
C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
Univ Missouri, Dept Comp Sci, Digital Biol Lab, Columbia, MO 65211 USA.
Washington State Univ, Dept Genet & Cell Biol, Pullman, WA 99164 USA.
RP Zhou, JZ (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA.
EM wanx@missouri.edu; xudong@missouri.edu; andyk@wsu.edu; zhouj@ornl.gov
NR 42
TC 66
Z9 72
U1 1
U2 7
PU BIOMED CENTRAL LTD
PI LONDON
PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND
SN 1471-2148
J9 BMC EVOL BIOL
JI BMC Evol. Biol.
PD JUN 28
PY 2004
VL 4
AR 19
DI 10.1186/1471-2148-4-19
PG 11
WC Evolutionary Biology; Genetics & Heredity
SC Evolutionary Biology; Genetics & Heredity
GA 837UE
UT WOS:000222665600002
PM 15222899
ER
PT J
AU Kesanli, B
Fettinger, J
Scott, B
Eichhorn, B
AF Kesanli, B
Fettinger, J
Scott, B
Eichhorn, B
TI Gas phase, solution, and solid state alkali ion binding by the
[NbE8](3-)(E = As, Sb) complexes: Synthesis, structure, and spectroscopy
SO INORGANIC CHEMISTRY
LA English
DT Article
ID LIPOPHILIC G-QUADRUPLEX; ISOGUANOSINE PENTAMERS; CESIUM; ANIONS;
COORDINATION; EXTRACTION; CHEMISTRY; CATION; MO; RECOGNITION
AB Toluene solutions of Nb(toluene)(2) react with ethylenediamine solutions of K3E7 (E = As, Sb) in the presence of 2,2,2-crypt to give [NbAS(8)](3-) (2) and [NbSb8](3-) (3) ions, respectively, in low yields. The Cs-133 NMR spectroscopy, ESIMS results (negative ion mode), and single-crystal X-ray structures of the ions are reported. The complexes have S-8-like E-8 rings with Nb atoms in the center. The 1:1 complex of 2 with Cs was observed in solution and also in the gas phase as the oxidized ion [CsNbAS(8)](1-). The anion 2 selectively binds to Cs+ in solution even in the presence of excess Na+. Other gas-phase ions formed include [Cs-2(NbAS(8))](1-), [KCs(NbAS(8))](1-), [KCs(NbAS(8))(2)](1-), [KNbAs8](1-), and [K2NbAs8](1-).
C1 Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA.
Los Alamos Natl Lab, Div Technol, Los Alamos, NM 87545 USA.
Los Alamos Natl Lab, Div Chem Sci, Los Alamos, NM 87545 USA.
RP Eichhorn, B (reprint author), Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA.
EM eichhorn@umd.edu
RI Scott, Brian/D-8995-2017
OI Scott, Brian/0000-0003-0468-5396
NR 42
TC 20
Z9 20
U1 0
U2 9
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 JUN 28
PY 2004
VL 43
IS 13
BP 3840
EP 3846
DI 10.1021/ic035397x
PG 7
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 831AQ
UT WOS:000222165700019
PM 15206864
ER
PT J
AU Shan, XP
Ellern, A
Guzei, IA
Espenson, JH
AF Shan, XP
Ellern, A
Guzei, IA
Espenson, JH
TI Ligand displacement and oxidation reactions of methyl(oxo)rhenium(V)
complexes
SO INORGANIC CHEMISTRY
LA English
DT Article
ID OXYGEN-ATOM TRANSFER; MAIN-GROUP ELEMENTS; IRON-SULFUR PROTEIN;
RAY-ABSORPTION-SPECTROSCOPY; PYRIDINE N-OXIDES; S HYDROGEN-BOND; SULFITE
OXIDASE; TRANSITION-METALS; MULTIPLE BONDS; CONDENSATION-REACTIONS
AB Compounds that contain the anion [MeReO(edt)(SPh)](-) (3(-)) were synthesized with the countercations 2-picolinium (PicH(+)3(-)) and 2,6-lutidinium (LutH(+)3(-)), where edt is 1,2-ethanedithiolate. Both PicH(+)3(-) and MeReO(edt)(tetramethylthiourea) (4) were crystallographically characterized. The rhenium atom in each of these compounds exists in a five-coordinate distorted square pyramid. In the solid state, PicH(+)3(-) contains an anion with a short (d(SH) = 232 pm) and nearly linear hydrogen-bonded (N-H...S) interaction to the cation. Ligand substitution reactions were studied in chloroform. Displacement of PhSH by PPh3 follows second-order kinetics, d[MeReO(edt)(PPh3)]/dt = KPicH(+)3(-)][PPh3], whereas with pyridines an unusual form was found, d[MeReO(edt)(Py)]/dt = KPyH(+)3(-)][Py]2, in which the conversion of PicH(+)3(-) to PyH(+)3(-) has been incorporated. Further, added Py accelerates the formation of [MeReO(edt)(PPh3)], v = k(.)[PicH(+)3(-)].[PPh3].[Py]. Compound 4, on the other hand, reacts with both PPh3 and pyridines, L, at a rate given by d[MeReO(edt)(L)]/dt = k-[4]-[L]. When PicH(+)3(-) reacts with pyridine N-oxides, a three-stage reaction was observed, consistent with ligand replacement of SPh- by PyO, N-O bond cleavage of the PyO assisted by another PyO, and eventual decomposition of MeRe(O)(edt)(OPy) to MeReO3, Each of first two steps showed a large substituent effect; Hammett analysis gave rho(1) = -5.3 and rho(2) = -4.3.
C1 Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ Sci & Technol, Dept Chem, Ames, IA 50011 USA.
RP Espenson, JH (reprint author), Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA.
EM Espenson@iastate.edu
NR 49
TC 6
Z9 6
U1 0
U2 5
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 JUN 28
PY 2004
VL 43
IS 13
BP 3854
EP 3862
DI 10.1021/ic049772c
PG 9
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 831AQ
UT WOS:000222165700021
PM 15206866
ER
PT J
AU Manson, JL
Schlueter, JA
Koo, HJ
Whangbo, MH
AF Manson, JL
Schlueter, JA
Koo, HJ
Whangbo, MH
TI Reexamination of the magnetic properties of Cu-2(dca)(4)(2,5-me(2)pyz)
{dca = dicyanamide; me(2)pyz = dimethylpyrazine}: isolated spin-1/2
dimers versus long-range magnetic ordering
SO INORGANIC CHEMISTRY
LA English
DT Article
ID 1-D COORDINATION POLYMERS; COMPLEXES; N(CN)(2)(-); PYRAZINE; EXCHANGE;
PYRIDINE; LIGANDS; BINDING; PYZ
AB The magnetic properties of Cu-2(dca)(4)(2,5-me(2)pyz) have been reexamined. The extended structure of Cu-2(dca)(4)(2,5-me(2)pyz) can be viewed in terms of Cu-2(2,5-me(2)pyz)(4+) dimer units interconnected via mu(1,5)-dca ligands. The bulk magnetic susceptibility chi(T) and the isothermal M(H) of Cu-2(dca)(4)(2,5-me(2)pyz) are shown to be well described by an isolated dimer model. This finding was confirmed by carrying out a spin dimer analysis based on tight-binding calculations, which shows that the 2,5-me(2)pyz ligand provides a substantial spin exchange interaction between the Cu2+ ions while the dca ligands do not.
C1 Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA.
Eastern Washington Univ, Dept Chem & Biochem, Cheney, WA 99004 USA.
Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA.
RP Manson, JL (reprint author), Eastern Washington Univ, Dept Chem & Biochem, 226 Sci Bldg, Cheney, WA 99004 USA.
EM jmanson@ewu.edu
NR 25
TC 22
Z9 22
U1 0
U2 5
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 JUN 28
PY 2004
VL 43
IS 13
BP 4007
EP 4011
DI 10.1021/ic0354769
PG 5
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 831AQ
UT WOS:000222165700037
PM 15206882
ER
PT J
AU Delahaye, F
Nahar, SN
Pradhan, AK
Zhang, HL
AF Delahaye, F
Nahar, SN
Pradhan, AK
Zhang, HL
TI Resolution and accuracy of resonances in R-matrix cross sections
SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
LA English
DT Article
ID ELECTRON-ION RECOMBINATION; CLOSE-COUPLING APPROXIMATION; CHARGED IONS;
ATOMIC DATA; OVI; C+
AB We investigate the effect of resonances in photoionization and recombination cross sections computed using the R-matrix method. Photoionization and recombination rates derived from high-resolution cross sections for oxygen ions are compared with earlier works with less resolution and accuracy, such as in the widely used Opacity Project data. We find significant differences in photoionization rates for O II metastable states, averaged over Planck functions corresponding to ionizing radiation fields, with respect to the intrinsic accuracy of the calculations and improved resolution. Furthermore, for highly charged ions other physical effects are also important. Recombination rate coefficients, averaged over a Maxwellian distribution, are extremely sensitive to the position and resolution of near-threshold resonances and radiation damping, in (e + O VII) <----> O VI + hv. Surprisingly, however, the effect on the monochromatic and the mean Rosseland and Planck bound-free opacities is relatively small, but may be potentially significant.
C1 Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
Los Alamos Natl Lab, Div Appl Phys, Los Alamos, NM 87545 USA.
RP Delahaye, F (reprint author), Ohio State Univ, Dept Astron, 174 W 18Th Ave, Columbus, OH 43210 USA.
NR 27
TC 0
Z9 0
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-4075
J9 J PHYS B-AT MOL OPT
JI J. Phys. B-At. Mol. Opt. Phys.
PD JUN 28
PY 2004
VL 37
IS 12
BP 2585
EP 2592
AR PII S0953-4075(04)75545-5
DI 10.1088/0953-4075/37/12/013
PG 8
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 840AW
UT WOS:000222830400016
ER
PT J
AU Tomaselli, M
Liu, LC
Fritzsche, S
Kuhl, T
Ursescu, D
AF Tomaselli, M
Liu, LC
Fritzsche, S
Kuhl, T
Ursescu, D
TI Cluster transformation coefficients in many-body nuclear physics
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 8th International Conference on Clustering Aspects of Nuclear Structure
and Dynamics
CY NOV 24-29, 2003
CL Nara, JAPAN
SP RIKEN, Kyoto Univ, Grad Sch Sci
ID ANTISYMMETRIZED MOLECULAR-DYNAMICS; ENERGY-LEVELS; LIGHT-NUCLEI; SHELL
NUCLEI; ISOTOPES
AB Energies, electromagnetic moments and transitions in light nuclei are calculated in the microscopic dynamic-correlation model (DCM) which is based on large correlated basis of Slater's determinants characterized by an increasing number of core excited states. Microscopic calculations are performed for the magnetic moments and transitions of Be-9 and C-13. The magnetic moments of Li-6, Li-7, and Li-9 are also calculated. Further, results obtained for matter and charge radii of Be-7 and Be-9 are reported. The overall results obtained for these light odd- and even-nuclei show that the correct treatment of the Pauli principle and the diagonalization of large dimensional spaces are not compatible with the simple picture generated by cluster models.
C1 Gesell Schwerionenforsch mbH, GSI Darmstadt, D-64291 Darmstadt, Germany.
Los Alamos Natl Lab, T Div, Los Alamos, NM 87545 USA.
Univ Kassel, Inst Phys, D-34132 Kassel, Germany.
RP Tomaselli, M (reprint author), Gesell Schwerionenforsch mbH, GSI Darmstadt, D-64291 Darmstadt, Germany.
EM marco@gsi.de
RI Ursescu, Daniel/F-2216-2010; Kuhl, Thomas/C-2243-2012
OI Ursescu, Daniel/0000-0002-0612-670X; Kuhl, Thomas/0000-0001-6306-4579
NR 20
TC 3
Z9 3
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD JUN 28
PY 2004
VL 738
BP 216
EP 220
DI 10.1016/j.nuclphya.2004.04.034
PG 5
WC Physics, Nuclear
SC Physics
GA 835JS
UT WOS:000222479600036
ER
PT J
AU Maruhn, JA
Strayer, MR
Reinhardt, PG
Horiuchi, H
AF Maruhn, JA
Strayer, MR
Reinhardt, PG
Horiuchi, H
TI Search for highly-deformed or molecular states in a static Hartree-Fock
method
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 8th International Conference on Clustering Aspects of Nuclear Structure
and Dynamics
CY NOV 24-29, 2003
CL Nara, JAPAN
SP RIKEN, Kyoto Univ, Grad Sch Sci
C1 Univ Frankfurt, Inst Theoret Phys, D-6000 Frankfurt, Germany.
Oak Ridge Natl Lab, Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA.
Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
Univ Erlangen Nurnberg, Inst Theoret Phys, D-8520 Erlangen, Germany.
Kyoto Univ, Dept Phys, Kyoto 606, Japan.
RP Maruhn, JA (reprint author), Univ Frankfurt, Inst Theoret Phys, D-6000 Frankfurt, Germany.
EM maruhn@th.physik.uni-frankfurt.de
NR 2
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD JUN 28
PY 2004
VL 738
BP 245
EP 248
DI 10.1016/j.nuclphysa.2004.04.039
PG 4
WC Physics, Nuclear
SC Physics
GA 835JS
UT WOS:000222479600042
ER
PT J
AU Iwamoto, A
Ichikawa, T
Moller, P
Sierk, AJ
AF Iwamoto, A
Ichikawa, T
Moller, P
Sierk, AJ
TI Cluster expression in fission and fusion in high-dimensional
macroscopic-microscopic calculations
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 8th International Conference on Clustering Aspects of Nuclear Structure
and Dynamics
CY NOV 24-29, 2003
CL Nara, JAPAN
SP RIKEN, Kyoto Univ, Grad Sch Sci
AB We discuss the relation between the fission-fusion potential-energy surfaces of very heavy nuclei and the formation process of these nuclei in cold-fusion reactions. In the potential-energy surfaces, we find a pronounced valley structure, with one valley corresponding to the cold-fusion reaction, the other to fission. As the touching point is approached in the cold-fusion entrance channel, an instability towards dynamical deformation of the projectile occurs, which enhances the fusion cross section. These two "cluster effects" enhance the production of superheavy nuclei in cold-fusion reactions, in addition to the effect of the low compound-system excitation energy in these reactions.
C1 Japan Atom Energy Res Inst, Naka, Ibaraki 3191195, Japan.
Japan Atom Energy Res Inst, Adv Sci Res Ctr, Naka, Ibaraki 3191195, Japan.
Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Iwamoto, A (reprint author), Japan Atom Energy Res Inst, Naka, Ibaraki 3191195, Japan.
NR 3
TC 4
Z9 4
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD JUN 28
PY 2004
VL 738
BP 499
EP 502
DI 10.1016/j.nuclphysa.2004.04.096
PG 4
WC Physics, Nuclear
SC Physics
GA 835JS
UT WOS:000222479600096
ER
PT J
AU Friess, JJ
Gubser, SS
Mitra, I
AF Friess, JJ
Gubser, SS
Mitra, I
TI String creation in cosmologies with a varying dilaton
SO NUCLEAR PHYSICS B
LA English
DT Article
AB FRW solutions of the string theory low-energy effective actions are described, yielding a dilaton which first decreases and then increases. We study string creation in these backgrounds and find an exponential divergence due to an initial space-like singularity. We conjecture that this singularity may be removed by the effects of back-reaction, leading to a solution which at early times is de Sitter space. (C) 2004 Elsevier B.V. All rights reserved.
C1 Princeton Univ, Joseph Henry Labs, Princeton, NJ 08544 USA.
Univ Calif Berkeley, Berkeley Ctr Theoret Phys, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
Lawrence Berkeley Natl Lab, Theoret Phys Grp, Berkeley, CA 94720 USA.
RP Friess, JJ (reprint author), Princeton Univ, Joseph Henry Labs, Princeton, NJ 08544 USA.
EM imitra@socrates.berkeley.edu
NR 12
TC 14
Z9 14
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0550-3213
J9 NUCL PHYS B
JI Nucl. Phys. B
PD JUN 28
PY 2004
VL 689
IS 3
BP 243
EP 256
DI 10.1016/j.nuclphysb.2004.04.014
PG 14
WC Physics, Particles & Fields
SC Physics
GA 829RU
UT WOS:000222068200003
ER
PT J
AU Turner, LD
Dhal, BB
Hayes, JP
Mancuso, AP
Nugent, KA
Paterson, D
Scholten, RE
Tran, CQ
Peele, AG
AF Turner, LD
Dhal, BB
Hayes, JP
Mancuso, AP
Nugent, KA
Paterson, D
Scholten, RE
Tran, CQ
Peele, AG
TI X-ray phase imaging: Demonstration of extended conditions with
homogeneous objects
SO OPTICS EXPRESS
LA English
DT Article
ID CONTRAST; MICROSCOPY; RECONSTRUCTION; INTERFEROMETER; TOMOGRAPHY;
RESOLUTION; RETRIEVAL
AB We discuss contrast formation in a propagating x-ray beam. We consider the validity conditions for linear relations based on the transport-of-intensity equation ( IE) and on contrast transfer functions (CTFs). From a single diffracted image, we recover the thickness of a homogeneous object which has substantial absorption and a phase-shift of -0.37 radian. (C) 2004 Optical Society of America.
C1 Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia.
Swinburne Univ Technol, Ind Res Inst Swinburne, Hawthorn, Vic 3122, Australia.
Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Turner, LD (reprint author), Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia.
EM a.peele@latrobe.edu.au
RI Nugent, Keith/J-2699-2012; Turner, Lincoln/D-5066-2014; Scholten,
Robert/A-8586-2013; Tran, Chanh/M-7868-2015; Nugent, Keith/I-4154-2016
OI Nugent, Keith/0000-0003-1522-8991; Turner, Lincoln/0000-0003-0551-5583;
Scholten, Robert/0000-0002-2337-8036; Nugent, Keith/0000-0002-4281-3478
NR 27
TC 63
Z9 63
U1 0
U2 6
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 JUN 28
PY 2004
VL 12
IS 13
BP 2960
EP 2965
DI 10.1364/OPEX.12.002960
PG 6
WC Optics
SC Optics
GA 833FF
UT WOS:000222321200020
PM 19483813
ER
PT J
AU Fruchart-Najib, J
Bauge, E
Niculescu, LS
Pham, T
Thomas, B
Rommens, C
Majd, Z
Brewer, B
Pennacchio, LA
Fruchart, JC
AF Fruchart-Najib, J
Bauge, E
Niculescu, LS
Pham, T
Thomas, B
Rommens, C
Majd, Z
Brewer, B
Pennacchio, LA
Fruchart, JC
TI Mechanism of triglyceride lowering in mice expressing human
apolipoprotein A5
SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
LA English
DT Article
DE apolipoprotein AV; apolipoprotein CIII; lipoprotein lipasc; VLDL
clearance and postprandial hyperlipemia
ID LIPOPROTEIN-LIPASE ACTIVITY; ACTIVATED RECEPTOR-ALPHA; LOW-DENSITY
LIPOPROTEINS; CORONARY-ARTERY DISEASE; APOA5 GENE VARIANTS; RICH
LIPOPROTEINS; C-III; AV GENE; PLASMA TRIGLYCERIDES; TRANSGENIC MICE
AB Overexpression of human APOA5 in mice results in dramatically decreased plasma triglyceride levels. In this study we explored the mechanism underlying this hypotriglyceridemic effect. Initially we found that triglyceride turnover was faster in hAPOA5 transgenic mice compared to controls, and this strongly correlated with increased LPL activity in postheparin plasma. Furthermore, we show that in vitro recombinant apoAV interacts physically with lipoprotein lipase and significantly increased its activity. We show that both apoB and apoCIII are decreased in hAPOA5 transgenic mice indicating a decrease in VLDL number. To further investigate the mechanism of hAPOA5 in a hyperlipidemic background, we inter-crossed hAPOA5 and hAPOC-3 transgenic mice. We found a marked decrease in VLDL triglyceride and cholesterol, as well as apolipoprotein B and CIII levels. These data indicated that apoAV induces a decrease in VLDL size by activating lipolysis and an increase of VLDL clearance. In a postprandial state, the normal triglyceride response found in wild-type mice was significantly reduced in hAPOA5 transgenics. In addition, we demonstrated that in response to this fat load in hAPOA5 x hAPOC3 mice, apoAV, but not apoCIII, was redistributed from primarily HDL to VLDL. This shift of apoAV in VLDL appears to limit the increase of triglyceride by activating the lipoprotein lipase. (C) 2004 Elsevier Inc. All rights reserved.
C1 Inst Pasteur, INSERM, UR 545, Dept Atherosclerose, F-59019 Lille, France.
Univ Lille 2, F-59019 Lille, France.
Genfit SA, F-59120 Loos, France.
NHLBI, Mol Dis Branch, NIH, Bethesda, MD 20892 USA.
Lawrence Berkeley Lab, Genome Sci Dept, Berkeley, CA 94720 USA.
Lawrence Berkeley Lab, Joint Genome Inst, Berkeley, CA 94720 USA.
Inst Cellular Biol N Simionescu, Bucharest, Romania.
RP Fruchart-Najib, J (reprint author), Inst Pasteur, INSERM, UR 545, Dept Atherosclerose, Rue Pr Calmette BP 245, F-59019 Lille, France.
EM jamila.fruchart@pasteur-lille.fr
RI Niculescu, Loredan Stefan/F-2591-2010
OI Niculescu, Loredan Stefan/0000-0002-1394-9085
FU NHLBI NIH HHS [HL071954A, HL66681]
NR 36
TC 150
Z9 161
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 0006-291X
J9 BIOCHEM BIOPH RES CO
JI Biochem. Biophys. Res. Commun.
PD JUN 25
PY 2004
VL 319
IS 2
BP 397
EP 404
DI 10.1016/j.bbrc.2004.05.003
PG 8
WC Biochemistry & Molecular Biology; Biophysics
SC Biochemistry & Molecular Biology; Biophysics
GA 829PS
UT WOS:000222062700016
PM 15178420
ER
PT J
AU Krauss, SW
Lee, G
Chasis, JA
Mohandas, N
Heald, R
AF Krauss, SW
Lee, G
Chasis, JA
Mohandas, N
Heald, R
TI Two protein 4.1 domains essential for mitotic spindle and aster
microtubule dynamics and organization in vitro
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID FUNCTIONAL-CHARACTERIZATION; CYTOPLASMIC DYNEIN; BINDING DOMAIN; NUCLEAR
ACTIN; 4.1 FAMILY; NUMA; CENTROSOMES; CELLS; DYNACTIN; ISOFORMS
AB Multifunctional structural proteins belonging to the 4.1 family are components of nuclei, spindles, and centrosomes in vertebrate cells. Here we report that 4.1 is critical for spindle assembly and the formation of centrosome-nucleated and motor-dependent self-organized microtubule asters in metaphase-arrested Xenopus egg extracts. Immunodepletion of 4.1 disrupted microtubule arrays and mislocalized the spindle pole protein NuMA. Remarkably, assembly was completely rescued by supplementation with a recombinant 4.1R isoform. We identified two 4.1 domains critical for its function in microtubule polymerization and organization utilizing dominant negative peptides. The 4.1 spectrin-actin binding domain or NuMA binding C-terminal domain peptides caused morphologically disorganized structures. Control peptides with low homology or variant spectrin-actin binding domain peptides that were incapable of binding actin had no deleterious effects. Unexpectedly, the addition of C-terminal domain peptides with reduced NuMA binding caused severe microtubule destabilization in extracts, dramatically inhibiting aster and spindle assembly and also depolymerizing preformed structures. However, the mutant C-terminal peptides did not directly inhibit or destabilize microtubule polymerization from pure tubulin in a microtubule pelleting assay. Our data showing that 4.1 is a crucial factor for assembly and maintenance of mitotic spindles and self-organized and centrosome-nucleated microtubule asters indicates that 4.1 is involved in regulating both microtubule dynamics and organization. These investigations underscore an important functional context for protein 4.1 in microtubule morphogenesis and highlight a previously unappreciated role for 4.1 in cell division.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
New York Blood Ctr, New York, NY 10021 USA.
Univ Calif Berkeley, Dept Cell & Mol Biol, Berkeley, CA 94720 USA.
RP Krauss, SW (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, 1 Cyclotron Rd,MS 74-157, Berkeley, CA 94720 USA.
EM sakrauss@lbl.gov
OI Heald, Rebecca/0000-0001-6671-6528
FU NIDDK NIH HHS [DK32094, DK59079]; NIGMS NIH HHS [GM057839]
NR 50
TC 16
Z9 17
U1 0
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 JUN 25
PY 2004
VL 279
IS 26
BP 27591
EP 27598
DI 10.1074/jbc.M402813200
PG 8
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 830KH
UT WOS:000222120400093
PM 15102852
ER
PT J
AU Hawley, N
Lesht, BM
Schwab, DJ
AF Hawley, N
Lesht, BM
Schwab, DJ
TI A comparison of observed and modeled surface waves in southern Lake
Michigan and the implications for models of sediment resuspension
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
DE Lake Michigan; wave model; sediment resuspension by waves
ID UNSTRATIFIED PERIOD; PREDICTION MODEL; TRANSPORT; ERIE
AB Subsurface pressure sensors were used to make measurements of surface waves during 18 deployments in southern Lake Michigan between 1998 and 2000. Most of the observations were made during the unstratified period (November-May) in water depths between 10 and 55 m. The observations ( as well as those obtained from the National Data Buoy Center (NDBC) buoy 45007, which is located in the middle of the southern basin of the lake) were compared to the results obtained from the Great Lakes Environmental Research Laboratory (GLERL)-Donelan wave model implemented on a 2-km grid. The results show that the wave model does a good job of calculating the wave heights, but consistently underestimates the wave periods. In over 80% of the cases the bottom stresses calculated from both the observations and the wave model results agree as to whether or not resuspension occurs, but over 70% of this agreement is for cases when resuspension does not occur; both stresses predict resuspension about 6% of the time. Since the bottom stresses calculated from the model results are usually lower than those calculated from the observations, resuspension estimates based on the wave model parameters are also lower than those calculated from the observed waves.
C1 NOAA, Great Lakes Environm Res Lab, Ann Arbor, MI 48105 USA.
Argonne Natl Lab, Argonne, IL 60439 USA.
RP Hawley, N (reprint author), NOAA, Great Lakes Environm Res Lab, 2205 Commonwealth Blvd, Ann Arbor, MI 48105 USA.
EM nathan.hawley@noaa.gov; bmlesht@anl.gov; david.schwab@noaa.gov
RI Schwab, David/B-7498-2012
NR 21
TC 8
Z9 8
U1 2
U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9275
EI 2169-9291
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD JUN 25
PY 2004
VL 109
IS C10
AR C10S03
DI 10.1029/2002JC001592
PG 11
WC Oceanography
SC Oceanography
GA 839IN
UT WOS:000222777400001
ER
PT J
AU Austin, DE
Beauchamp, JL
Manning, HLK
Bailey, CL
AF Austin, DE
Beauchamp, JL
Manning, HLK
Bailey, CL
TI A compact time-of-flight mass spectrometer for high-flux cosmic dust
analysis
SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
LA English
DT Article
DE cometary dust; mass spectrometer; impact ionization; comet flyby;
hypervelocity impact; interplanetary dust
ID IMPACT-IONIZATION; ACCELERATOR; PARTICLES
AB Time-of-flight mass spectrometers on spacecraft are the most direct method for determining chemical composition of cosmic dust grains. Miniaturization of these instruments presents many challenges. Larger space-charge effects, greater deviations from the paraxial approximation, and various ion-optical aberrations negatively affect mass resolution in small time-of-flight instruments. We report on the building and testing of an instrument design that may reduce these effects. In addition to a linear reflectron, ions pass through a ring aperture that transmits only those ions with transverse velocity components that fall within a specific range. This novel design focuses ions onto a detector with greatly reduced spherical aberration. Space-charge effects and the effects of impact plate cratering and grid scatter are also reduced using this design. Controlled impacts of iron microparticles at several km/s demonstrate instrument performance. This instrument is suited for characterization of cosmic dust in regions of very high dust flux, such as a comet flyby, and it may also have practical laboratory or field applications.
C1 CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA.
Concordia Coll, Dept Phys, Moorhead, MN 56562 USA.
RP Austin, DE (reprint author), Sandia Natl Labs, MS 0886,POB 5800, Albuquerque, NM 87185 USA.
EM deaust@sandia.gov
NR 19
TC 2
Z9 2
U1 1
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-PLANET
JI J. Geophys. Res.-Planets
PD JUN 25
PY 2004
VL 109
IS E7
AR E07S07
DI 10.1029/2003JE002184
PG 5
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 839IR
UT WOS:000222777800001
ER
PT J
AU Aubert, B
Barate, R
Boutigny, D
Gaillard, JM
Hicheur, A
Karyotakis, Y
Lees, JP
Robbe, P
Tisserand, V
Zghiche, A
Palano, A
Pompili, A
Chen, JC
Qi, ND
Rong, G
Wang, P
Zhu, YS
Eigen, G
Ofte, I
Stugu, B
Abrams, GS
Borgland, AW
Breon, AB
Brown, DN
Button-Shafer, J
Cahn, RN
Charles, E
Day, CT
Gill, MS
Gritsan, AV
Groysman, Y
Jacobsen, RG
Kadel, RW
Kadyk, J
Kerth, LT
Kolomensky, YG
Kukartsev, G
LeClerc, C
Levi, ME
Lynch, G
Mir, LM
Oddone, PJ
Orimoto, TJ
Pripstein, M
Roe, NA
Romosan, A
Ronan, MT
Shelkov, VG
Telnov, AV
Wenzel, WA
Ford, K
Harrison, TJ
Hawkes, CM
Knowles, DJ
Morgan, SE
Penny, RC
Watson, AT
Watson, NK
Goetzen, K
Held, T
Koch, H
Lewandowski, B
Pelizaeus, M
Peters, K
Schmuecker, H
Steinke, M
Boyd, JT
Chevalier, N
Cottingham, WN
Kelly, MP
Latham, TE
Mackay, C
Wilson, FF
Abe, K
Cuhadar-Donszelmann, T
Hearty, C
Mattison, TS
McKenna, JA
Thiessen, D
Kyberd, P
McKemey, AK
Teodorescu, L
Blinov, VE
Bukin, AD
Golubev, VB
Ivanchenko, VN
Kravchenko, EA
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Yushkov, AN
Best, D
Bruinsma, M
Chao, M
Kirkby, D
Lankford, AJ
Mandelkern, M
Mommsen, RK
Roethel, W
Stoker, DP
Buchanan, C
Hartfiel, BL
Gary, JW
Layter, J
Shen, BC
Wang, K
del Re, D
Hadavand, HK
Hill, EJ
MacFarlane, DB
Paar, HP
Rahatlou, S
Sharma, V
Berryhill, JW
Campagnari, C
Dahmes, B
Kuznetsova, N
Levy, SL
Long, O
Lu, A
Mazur, MA
Richman, JD
Verkerke, W
Beck, TW
Beringer, J
Eisner, AM
Heusch, CA
Lockman, WS
Schalk, T
Schmitz, RE
Schumm, BA
Seiden, A
Turri, M
Walkowiak, W
Williams, DC
Wilson, MG
Albert, J
Chen, E
Dubois-Felsmann, GP
Dvoretskii, A
Erwin, RJ
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Ryd, A
Samuel, A
Yang, S
Jayatilleke, S
Mancinelli, G
Meadows, BT
Sokoloff, MD
Abe, T
Blanc, F
Bloom, P
Chen, S
Clark, PJ
Ford, WT
Nauenberg, U
Olivas, A
Rankin, P
Roy, J
Smith, JG
van Hoek, WC
Zhang, L
Harton, JL
Hu, T
Soffer, A
Toki, WH
Wilson, RJ
Zhang, J
Altenburg, D
Brandt, T
Brose, J
Colberg, T
Dickopp, M
Dubitzky, RS
Hauke, A
Lacker, HM
Maly, E
Muller-Pfefferkorn, R
Nogowski, R
Otto, S
Schubert, J
Schubert, KR
Schwierz, R
Spaan, B
Wilden, L
Bernard, D
Bonneaud, GR
Brochard, F
Cohen-Tanugi, J
Grenier, P
Thiebaux, C
Vasileiadis, G
Verderi, M
Khan, A
Lavin, D
Muheim, F
Playfer, S
Swain, JE
Andreotti, M
Azzolini, V
Bettoni, D
Bozzi, C
Calabrese, R
Cibinetto, G
Luppi, E
Negrini, M
Piemontese, L
Sarti, A
Treadwell, E
Anulli, F
Baldini-Ferroli, R
Biasini, M
Calcaterra, A
de Sangro, R
Falciai, D
Finocchiaro, G
Patteri, P
Peruzzi, IM
Piccolo, M
Pioppi, M
Zallo, A
Buzzo, A
Capra, R
Contri, R
Crosetti, G
Lo Vetere, M
Macri, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Bailey, S
Morii, M
Won, E
Bhimji, W
Bowerman, DA
Dauncey, PD
Egede, U
Eschrich, I
Gaillard, JR
Morton, GW
Nash, JA
Sanders, P
Taylor, GP
Grenier, GJ
Lee, SJ
Mallik, U
Cochran, J
Crawley, HB
Lamsa, J
Meyer, WT
Prell, S
Rosenberg, EI
Yi, J
Davier, M
Grosdidier, G
Hocker, A
Laplace, S
Le Diberder, F
Lepeltier, V
Lutz, AM
Petersen, TC
Plaszczynski, S
Schune, MH
Tantot, L
Wormser, G
Brigljevic, V
Cheng, CH
Lange, DJ
Simani, MC
Wright, DM
Bevan, AJ
Coleman, JP
Fry, JR
Gabathuler, E
Gamet, R
Kay, M
Parry, RJ
Payne, DJ
Sloane, RJ
Touramanis, C
Back, JJ
Harrison, PF
Shorthouse, HW
Vidal, PB
Brown, CL
Cowan, G
Flack, RL
Flaecher, HU
George, S
Green, MG
Kurup, A
Marker, CE
McMahon, TR
Ricciardi, S
Salvatore, F
Vaitsas, G
Winter, MA
Brown, D
Davis, CL
Allison, J
Barlow, NR
Barlow, RJ
Hart, PA
Hodgkinson, MC
Jackson, F
Lafferty, GD
Lyon, AJ
Weatherall, JH
Williams, JC
Farbin, A
Jawahery, A
Kovalskyi, D
Lae, CK
Lillard, V
Roberts, DA
Blaylock, G
Dallapiccola, C
Flood, KT
Hertzbach, SS
Kofler, R
Koptchev, VB
Moore, TB
Saremi, S
Staengle, H
Willocq, S
Cowan, R
Sciolla, G
Taylor, F
Yamamoto, RK
Mangeol, DJJ
Patel, PM
Robertson, SH
Lazzaro, A
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Reidy, J
Sanders, DA
Summers, DJ
Zhao, HW
Brunet, S
Cote-Ahern, D
Taras, P
Nicholson, H
Cartaro, C
Cavallo, N
De Nardo, G
Fabozzi, F
Gatto, C
Lista, L
Paolucci, P
Piccolo, D
Sciacca, C
Baak, MA
Raven, G
LoSecco, JM
Gabriel, TA
Brau, B
Gan, KK
Honscheid, K
Hufnagel, D
Kagan, H
Kass, R
Pulliam, T
Wong, QK
Brau, J
Frey, R
Potter, CT
Sinev, NB
Strom, D
Torrence, E
Colecchia, F
Dorigo, A
Galeazzi, F
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Tiozzo, G
Voci, C
Benayoun, M
Briand, H
Chauveau, J
David, P
de la Vaissiere, C
Del Buono, L
Hamon, O
John, MJJ
Leruste, P
Ocariz, J
Pivk, M
Roos, L
Stark, J
T'Jampens, S
Therin, G
Manfredi, PF
Re, V
Behera, PK
Gladney, L
Guo, QH
Panetta, J
Angelini, C
Batignani, G
Bettarini, S
Bondioli, M
Bucci, F
Calderini, G
Carpinelli, M
Del Gamba, V
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Martinez-Vidal, F
Morganti, M
Neri, N
Paoloni, E
Rama, M
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Sandrelli, F
Walsh, J
Haire, M
Judd, D
Paick, K
Wagoner, DE
Danielson, N
Elmer, P
Lu, C
Miftakov, V
Olsen, J
Smith, AJS
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Mazzoni, MA
Morganti, S
Pierini, M
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Wagner, G
Waldi, R
Adye, T
De Groot, N
Franek, B
Geddes, NI
Gopal, GP
Olaiya, EO
Xella, SM
Aleksan, R
Emery, S
Gaidot, A
Ganzhur, SF
Giraud, PF
de Monchenault, GH
Kozanecki, W
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London, GW
Mayer, B
Schott, G
Vasseur, G
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Purohit, MV
Weidemann, AW
Yumiceva, FX
Aston, D
Bartoldus, R
Berger, N
Boyarski, AM
Buchmueller, OL
Convery, MR
Coupal, DP
Dong, D
Dorfan, J
Dujmic, D
Dunwoodie, W
Field, RC
Glanzman, T
Gowdy, SJ
Grauges-Pous, E
Hadig, T
Halyo, V
Hryn'ova, T
Innes, WR
Jessop, CP
Kelsey, MH
Kim, P
Kocian, ML
Langenegger, U
Leith, DWGS
Libby, J
Luitz, S
Luth, V
Lynch, HL
Marsiske, H
Messner, R
Muller, DR
O'Grady, CP
Ozcan, VE
Perazzo, A
Perl, M
Petrak, S
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Simi, G
Snyder, A
Soha, A
Stelzer, J
Su, D
Sullivan, MK
Va'vra, J
Wagner, SR
Weaver, M
Weinstein, AJR
Wisniewski, WJ
Wright, DH
Young, CC
Burchat, PR
Edwards, AJ
Meyer, TI
Petersen, BA
Roat, C
Ahmed, M
Ahmed, S
Alam, MS
Ernst, JA
Saeed, MA
Saleem, M
Wappler, FR
Bugg, W
Krishnamurthy, M
Spanier, SM
Eckmann, R
Kim, H
Ritchie, JL
Schwitters, RF
Izen, JM
Kitayama, I
Lou, XC
Ye, S
Bianchi, F
Bona, M
Gallo, F
Gamba, D
Borean, C
Bosisio, L
Della Ricca, G
Dittongo, S
Grancagnolo, S
Lanceri, L
Poropat, P
Vitale, L
Vuagnin, G
Panvini, RS
Banerjee, S
Brown, CM
Fortin, D
Jackson, PD
Kowalewski, R
Roney, JM
Band, HR
Dasu, S
Datta, M
Eichenbaum, AM
Johnson, JR
Kutter, PE
Li, H
Liu, R
Di Lodovico, F
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Sekula, SJ
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Neal, H
AF Aubert, B
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Boutigny, D
Gaillard, JM
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Martinez-Vidal, F
Morganti, M
Neri, N
Paoloni, E
Rama, M
Rizzo, G
Sandrelli, F
Walsh, J
Haire, M
Judd, D
Paick, K
Wagoner, DE
Danielson, N
Elmer, P
Lu, C
Miftakov, V
Olsen, J
Smith, AJS
Tanaka, HA
Varnes, EW
Bellini, F
Cavoto, G
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Mazzoni, MA
Morganti, S
Pierini, M
Piredda, G
Tehrani, FS
Voena, C
Christ, S
Wagner, G
Waldi, R
Adye, T
De Groot, N
Franek, B
Geddes, NI
Gopal, GP
Olaiya, EO
Xella, SM
Aleksan, R
Emery, S
Gaidot, A
Ganzhur, SF
Giraud, PF
de Monchenault, GH
Kozanecki, W
Langer, M
Legendre, M
London, GW
Mayer, B
Schott, G
Vasseur, G
Yeche, C
Zito, M
Purohit, MV
Weidemann, AW
Yumiceva, FX
Aston, D
Bartoldus, R
Berger, N
Boyarski, AM
Buchmueller, OL
Convery, MR
Coupal, DP
Dong, D
Dorfan, J
Dujmic, D
Dunwoodie, W
Field, RC
Glanzman, T
Gowdy, SJ
Grauges-Pous, E
Hadig, T
Halyo, V
Hryn'ova, T
Innes, WR
Jessop, CP
Kelsey, MH
Kim, P
Kocian, ML
Langenegger, U
Leith, DWGS
Libby, J
Luitz, S
Luth, V
Lynch, HL
Marsiske, H
Messner, R
Muller, DR
O'Grady, CP
Ozcan, VE
Perazzo, A
Perl, M
Petrak, S
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Simi, G
Snyder, A
Soha, A
Stelzer, J
Su, D
Sullivan, MK
Va'vra, J
Wagner, SR
Weaver, M
Weinstein, AJR
Wisniewski, WJ
Wright, DH
Young, CC
Burchat, PR
Edwards, AJ
Meyer, TI
Petersen, BA
Roat, C
Ahmed, M
Ahmed, S
Alam, MS
Ernst, JA
Saeed, MA
Saleem, M
Wappler, FR
Bugg, W
Krishnamurthy, M
Spanier, SM
Eckmann, R
Kim, H
Ritchie, JL
Schwitters, RF
Izen, JM
Kitayama, I
Lou, XC
Ye, S
Bianchi, F
Bona, M
Gallo, F
Gamba, D
Borean, C
Bosisio, L
Della Ricca, G
Dittongo, S
Grancagnolo, S
Lanceri, L
Poropat, P
Vitale, L
Vuagnin, G
Panvini, RS
Banerjee, S
Brown, CM
Fortin, D
Jackson, PD
Kowalewski, R
Roney, JM
Band, HR
Dasu, S
Datta, M
Eichenbaum, AM
Johnson, JR
Kutter, PE
Li, H
Liu, R
Di Lodovico, F
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Sekula, SJ
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Neal, H
CA BABAR Collaboration
TI Measurement of time-dependent CP asymmetries in B-0 -> D-(*)+/-pi(-/+)
decays and constraints on sin(2 beta+gamma)
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID VIOLATION
AB We present a measurement of CP-violating asymmetries in fully reconstructed B-0-->D((*)+/-)pi(-/+) decays in approximately 88x10(6) Y(4S)-->B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. From a time-dependent maximum-likelihood fit we obtain the following for the CP-violating parameters: a=-0.022+/-0.038 (stat)+/-0.020 (syst), a(*)=-0.068+/-0.038 (stat)+/-0.020 (syst), c(lep)=+0.025+/-0.068 (stat)+/-0.033 (syst), and c(lep)(*)=+0.031+/-0.070 (stat)+/-0.033 (syst). Using other measurements and theoretical assumptions we interpret the results in terms of the angles of the Cabibbo-Kobayashi-Maskawa unitarity triangle, and find parallel tosin(2beta+gamma)parallel to>0.69 at 68% confidence level. We exclude the hypothesis of no CP violation [sin(2beta+gamma)=0] at 83% confidence level.
C1 Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France.
Univ Bari, Dipartimento Fis, I-70126 Bari, Italy.
Ist Nazl Fis Nucl, I-70126 Bari, Italy.
Inst High Energy Phys, Beijing 100039, Peoples R China.
Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany.
Univ Bristol, Bristol BS8 1TL, Avon, England.
Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
Brunel Univ, Uxbridge UB8 3PH, Middx, England.
Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
Univ Calif Irvine, Irvine, CA 92697 USA.
Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
Univ Calif Riverside, Riverside, CA 92521 USA.
Univ Calif San Diego, La Jolla, CA 92093 USA.
Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA.
CALTECH, Pasadena, CA 91125 USA.
Univ Cincinnati, Cincinnati, OH 45221 USA.
Univ Colorado, Boulder, CO 80309 USA.
Colorado State Univ, Ft Collins, CO 80523 USA.
Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
Ecole Polytech, LLR, F-91128 Palaiseau, France.
Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy.
Ist Nazl Fis Nucl, I-44100 Ferrara, Italy.
Florida A&M Univ, Tallahassee, FL 32307 USA.
Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy.
Ist Nazl Fis Nucl, I-16146 Genoa, Italy.
Harvard Univ, Cambridge, MA 02138 USA.
Univ London Imperial Coll Sci Technol & Med, London SW7 2BW, England.
Univ Iowa, Iowa City, IA 52242 USA.
Iowa State Univ, Ames, IA 50011 USA.
Lab Accelerateur Lineaire, F-91898 Orsay, France.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Univ Liverpool, Liverpool L69 3BX, Merseyside, England.
Univ London, Queen Mary, London E1 4NS, England.
Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England.
Univ Louisville, Louisville, KY 40292 USA.
Univ Manchester, Manchester M13 9PL, Lancs, England.
Univ Maryland, College Pk, MD 20742 USA.
Univ Massachusetts, Amherst, MA 01003 USA.
MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
McGill Univ, Montreal, PQ H3A 2T8, Canada.
Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
Ist Nazl Fis Nucl, I-20133 Milan, Italy.
Univ Mississippi, University, MS 38677 USA.
Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada.
Mt Holyoke Coll, S Hadley, MA 01075 USA.
Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy.
Ist Nazl Fis Nucl, I-80126 Naples, Italy.
Natl Inst Nucl Phys & High Energy Phys, NIKHEF, NL-1009 DB Amsterdam, Netherlands.
Univ Notre Dame, Notre Dame, IN 46556 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
Ohio State Univ, Columbus, OH 43210 USA.
Univ Oregon, Eugene, OR 97403 USA.
Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
Ist Nazl Fis Nucl, I-35131 Padua, Italy.
Univ Paris 06, Lab Phys Nucl HE, F-75252 Paris, France.
Univ Paris 07, Lab Phys Nucl HE, F-75252 Paris, France.
Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy.
Ist Nazl Fis Nucl, I-27100 Pavia, Italy.
Univ Penn, Philadelphia, PA 19104 USA.
Univ Pisa, Dipartimento Fis, Scuola Normale Super Pisa, I-56127 Pisa, Italy.
Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
Prairie View A&M Univ, Prairie View, TX 77446 USA.
Princeton Univ, Princeton, NJ 08544 USA.
Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
Ist Nazl Fis Nucl, I-00185 Rome, Italy.
Univ Rostock, D-18051 Rostock, Germany.
Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France.
Univ S Carolina, Columbia, SC 29208 USA.
Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
Stanford Univ, Stanford, CA 94305 USA.
SUNY Albany, Albany, NY 12222 USA.
Univ Tennessee, Knoxville, TN 37996 USA.
Univ Texas, Austin, TX 78712 USA.
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Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
Ist Nazl Fis Nucl, I-10125 Turin, Italy.
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Vanderbilt Univ, Nashville, TN 37235 USA.
Univ Victoria, Victoria, BC V8W 3P6, Canada.
Univ Wisconsin, Madison, WI 53706 USA.
Yale Univ, New Haven, CT 06511 USA.
Univ Perugia, I-06100 Perugia, Italy.
Univ Basilicata, I-85100 Potenza, Italy.
Univ Valencia, CSIC, Inst Fis Corpuscular, IFIC, Valencia, Spain.
RP Aubert, B (reprint author), Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France.
RI Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Lista,
Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; crosetti,
nanni/H-3040-2011; Neri, Nicola/G-3991-2012; Sarti, Alessio/I-2833-2012;
Cavallo, Nicola/F-8913-2012; Saeed, Mohammad Alam/J-7455-2012; Forti,
Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani,
Claudia/C-5223-2009; de Sangro, Riccardo/J-2901-2012; Negrini,
Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Luppi,
Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese,
Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal,
F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere,
Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; 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; Calcaterra, Alessandro/P-5260-2015; Frey,
Raymond/E-2830-2016
OI Peters, Klaus/0000-0001-7133-0662; Bellini, Fabio/0000-0002-2936-660X;
Neri, Nicola/0000-0002-6106-3756; Sarti, Alessio/0000-0001-5419-7951;
Saeed, Mohammad Alam/0000-0002-3529-9255; Forti,
Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163;
Patrignani, Claudia/0000-0002-5882-1747; de Sangro,
Riccardo/0000-0002-3808-5455; Negrini, Matteo/0000-0003-0101-6963;
Monge, Maria Roberta/0000-0003-1633-3195; Luppi,
Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400;
Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal,
F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere,
Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304;
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; Calcaterra,
Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636
NR 18
TC 14
Z9 14
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUN 25
PY 2004
VL 92
IS 25
AR 251801
DI 10.1103/PhysRevLett.92.251801
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 832KJ
UT WOS:000222266100011
ER
PT J
AU Aubert, B
Barate, R
Boutigny, D
Couderc, F
Gaillard, JM
Hicheur, A
Karyotakis, Y
Lees, JP
Robbe, P
Tisserand, V
Zghiche, A
Palano, A
Pompili, A
Chen, JC
Qi, ND
Rong, G
Wang, P
Zhu, YS
Eigen, G
Ofte, I
Stugu, B
Abrams, GS
Borgland, AW
Breon, AB
Brown, DN
Button-Shafer, J
Cahn, RN
Charles, E
Day, CT
Gill, MS
Gritsan, AV
Groysman, Y
Jacobsen, RG
Kadel, RW
Kadyk, J
Kerth, LT
Kolomensky, YG
Kukartsev, G
LeClerc, C
Levi, ME
Lynch, G
Mir, LM
Oddone, PJ
Orimoto, TJ
Pripstein, M
Roe, NA
Romosan, A
Ronan, MT
Shelkov, VG
Telnov, AV
Wenzel, WA
Ford, K
Harrison, TJ
Hawkes, CM
Knowles, DJ
Morgan, SE
Penny, RC
Watson, AT
Watson, NK
Goetzen, K
Held, T
Koch, H
Lewandowski, B
Pelizaeus, M
Peters, K
Schmuecker, H
Steinke, M
Boyd, JT
Chevalier, N
Cottingham, WN
Kelly, MP
Latham, TE
Mackay, C
Wilson, FF
Abe, K
Cuhadar-Donszelmann, T
Hearty, C
Mattison, TS
McKenna, JA
Thiessen, D
Kyberd, P
McKemey, AK
Teodorescu, L
Blinov, VE
Bukin, AD
Golubev, VB
Ivanchenko, VN
Kravchenko, EA
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Yushkov, AN
Best, D
Bruinsma, M
Chao, M
Kirkby, D
Lankford, AJ
Mandelkern, M
Mommsen, RK
Roethel, W
Stoker, DP
Buchanan, C
Hartfiel, BL
Gary, JW
Layter, J
Shen, BC
Wang, K
del Re, D
Hadavand, HK
Hill, EJ
MacFarlane, DB
Paar, HP
Rahatlou, S
Sharma, V
Berryhill, JW
Campagnari, C
Dahmes, B
Levy, SL
Long, O
Lu, A
Mazur, MA
Richman, JD
Verkerke, W
Beck, TW
Beringer, J
Eisner, AM
Heusch, CA
Lockman, WS
Schalk, T
Schmitz, RE
Schumm, BA
Seiden, A
Spradlin, P
Turri, M
Walkowiak, W
Williams, DC
Wilson, MG
Albert, J
Chen, E
Dubois-Felsmann, GP
Dvoretskii, A
Erwin, RJ
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Ryd, A
Samuel, A
Yang, S
Jayatilleke, S
Mancinelli, G
Meadows, BT
Sokoloff, MD
Abe, T
Blanc, F
Bloom, P
Chen, S
Clark, PJ
Ford, WT
Nauenberg, U
Olivas, A
Rankin, P
Roy, J
Smith, JG
van Hoek, WC
Zhang, L
Harton, JL
Hu, T
Soffer, A
Toki, WH
Wilson, RJ
Zhang, J
Altenburg, D
Brandt, T
Brose, J
Colberg, T
Dickopp, M
Dubitzky, RS
Hauke, A
Lacker, HM
Maly, E
Muller-Pfefferkorn, R
Nogowski, R
Otto, S
Schubert, J
Schubert, KR
Schwierz, R
Spaan, B
Wilden, L
Bernard, D
Bonneaud, GR
Brochard, F
Cohen-Tanugi, J
Grenier, P
Thiebaux, C
Vasileiadis, G
Verderi, M
Khan, A
Lavin, D
Muheim, F
Playfer, S
Swain, JE
Andreotti, M
Azzolini, V
Bettoni, D
Bozzi, C
Calabrese, R
Cibinetto, G
Luppi, E
Negrini, M
Piemontese, L
Sarti, A
Treadwell, E
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Falciai, D
Finocchiaro, G
Patteri, P
Piccolo, M
Zallo, A
Buzzo, A
Capra, R
Contri, R
Crosetti, G
Lo Vetere, M
Macri, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Bailey, S
Morii, M
Won, E
Bhimji, W
Bowerman, DA
Dauncey, PD
Egede, U
Eschrich, I
Gaillard, JR
Morton, GW
Nash, JA
Taylor, GP
Grenier, GJ
Lee, SJ
Mallik, U
Cochran, J
Crawley, HB
Lamsa, J
Meyer, WT
Prell, S
Rosenberg, EI
Yi, J
Davier, M
Grosdidier, G
Hocker, A
Laplace, S
Le Diberder, F
Lepeltier, V
Lutz, AM
Petersen, TC
Plaszczynski, S
Schune, MH
Tantot, L
Wormser, G
Brigljevic, V
Cheng, CH
Lange, DJ
Simani, MC
Wright, DM
Bevan, AJ
Coleman, JP
Fry, JR
Gabathuler, E
Gamet, R
Kay, M
Parry, RJ
Payne, DJ
Sloane, RJ
Touramanis, C
Back, JJ
Harrison, PF
Shorthouse, HW
Vidal, PB
Brown, CL
Cowan, G
Flack, RL
Flaecher, HU
George, S
Green, MG
Kurup, A
Marker, CE
McMahon, TR
Ricciardi, S
Salvatore, F
Vaitsas, G
Winter, MA
Brown, D
Davis, CL
Allison, J
Barlow, NR
Barlow, RJ
Hart, PA
Hodgkinson, MC
Jackson, F
Lafferty, GD
Lyon, AJ
Weatherall, JH
Williams, JC
Farbin, A
Jawahery, A
Kovalskyi, D
Lae, CK
Lillard, V
Roberts, DA
Blaylock, G
Dallapiccola, C
Flood, KT
Hertzbach, SS
Kofler, R
Koptchev, VB
Moore, TB
Saremi, S
Staengle, H
Willocq, S
Cowan, R
Sciolla, G
Taylor, F
Yamamoto, RK
Mangeol, DJJ
Patel, PM
Robertson, SH
Lazzaro, A
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Reidy, J
Sanders, DA
Summers, DJ
Zhao, HW
Brunet, S
Cote-Ahern, D
Taras, P
Nicholson, H
Cartaro, C
Cavallo, N
De Nardo, G
Fabozzi, F
Gatto, C
Lista, L
Paolucci, P
Piccolo, D
Sciacca, C
Baak, MA
Raven, G
LoSecco, JM
Gabriel, TA
Brau, B
Gan, KK
Honscheid, K
Hufnagel, D
Kagan, H
Kass, R
Pulliam, T
Wong, QK
Brau, J
Frey, R
Igonkina, O
Potter, CT
Sinev, NB
Strom, D
Torrence, E
Colecchia, F
Dorigo, A
Galeazzi, F
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Tiozzo, G
Voci, C
Benayoun, M
Briand, H
Chauveau, J
David, P
de la Vaissiere, C
Del Buono, L
Hamon, O
John, MJJ
Leruste, P
Ocariz, J
Pivk, M
Roos, L
Stark, J
T'Jampens, S
Therin, G
Manfredi, PF
Re, V
Behera, PK
Gladney, L
Guo, QH
Panetta, J
Anulli, F
Biasini, M
Peruzzi, IM
Pioppi, M
Angelini, C
Batignani, G
Bettarini, S
Bondioli, M
Bucci, F
Calderini, G
Carpinelli, M
Del Gamba, V
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Martinez-Vidal, F
Morganti, M
Neri, N
Paoloni, E
Rama, M
Rizzo, G
Sandrelli, F
Walsh, J
Haire, M
Judd, D
Paick, K
Wagoner, DE
Danielson, N
Elmer, P
Lu, C
Miftakov, V
Olsen, J
Smith, AJS
Tanaka, HA
Varnes, EW
Bellini, F
Cavoto, G
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Mazzoni, MA
Morganti, S
Pierini, M
Piredda, G
Tehrani, FS
Voena, C
Christ, S
Wagner, G
Waldi, R
Adye, T
De Groot, N
Franek, B
Geddes, NI
Gopal, GP
Olaiya, EO
Xella, SM
Aleksan, R
Emery, S
Gaidot, A
Ganzhur, SF
Giraud, PF
de Monchenault, GH
Kozanecki, W
Langer, M
Legendre, M
London, GW
Mayer, B
Schott, G
Vasseur, G
Yeche, C
Zito, M
Purohit, MV
Weidemann, AW
Yumiceva, FX
Aston, D
Bartoldus, R
Berger, N
Boyarski, AM
Buchmueller, OL
Convery, MR
Cristinziani, M
Dong, D
Dorfan, J
Dujmic, D
Dunwoodie, W
Elsen, EE
Field, RC
Glanzman, T
Gowdy, SJ
Grauges-Pous, E
Hadig, T
Halyo, V
Hryn'ova, T
Innes, WR
Jessop, CP
Kelsey, MH
Kim, P
Kocian, ML
Langenegger, U
Leith, DWGS
Libby, J
Luitz, S
Luth, V
Lynch, HL
Marsiske, H
Messner, R
Muller, DR
O'Grady, CP
Ozcan, VE
Perazzo, A
Perl, M
Petrak, S
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Simi, G
Snyder, A
Soha, A
Stelzer, J
Su, D
Sullivan, MK
Va'vra, J
Wagner, SR
Weaver, M
Weinstein, AJR
Wisniewski, WJ
Wright, DH
Young, CC
Burchat, PR
Edwards, AJ
Meyer, TI
Petersen, BA
Roat, C
Ahmed, M
Ahmed, S
Alam, MS
Ernst, JA
Saeed, MA
Saleem, M
Wappler, FR
Bugg, W
Krishnamurthy, M
Spanier, SM
Eckmann, R
Kim, H
Ritchie, JL
Schwitters, RF
Izen, JM
Kitayama, I
Lou, XC
Ye, S
Bianchi, F
Bona, M
Gallo, F
Gamba, D
Borean, C
Bosisio, L
Della Ricca, G
Dittongo, S
Grancagnolo, S
Lanceri, L
Poropat, P
Vitale, L
Vuagnin, G
Panvini, RS
Banerjee, S
Brown, CM
Fortin, D
Jackson, PD
Kowalewski, R
Roney, JM
Band, HR
Dasu, S
Datta, M
Eichenbaum, AM
Johnson, JR
Kutter, PE
Li, H
Liu, R
Di Lodovico, F
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Sekula, SJ
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Neal, H
AF Aubert, B
Barate, R
Boutigny, D
Couderc, F
Gaillard, JM
Hicheur, A
Karyotakis, Y
Lees, JP
Robbe, P
Tisserand, V
Zghiche, A
Palano, A
Pompili, A
Chen, JC
Qi, ND
Rong, G
Wang, P
Zhu, YS
Eigen, G
Ofte, I
Stugu, B
Abrams, GS
Borgland, AW
Breon, AB
Brown, DN
Button-Shafer, J
Cahn, RN
Charles, E
Day, CT
Gill, MS
Gritsan, AV
Groysman, Y
Jacobsen, RG
Kadel, RW
Kadyk, J
Kerth, LT
Kolomensky, YG
Kukartsev, G
LeClerc, C
Levi, ME
Lynch, G
Mir, LM
Oddone, PJ
Orimoto, TJ
Pripstein, M
Roe, NA
Romosan, A
Ronan, MT
Shelkov, VG
Telnov, AV
Wenzel, WA
Ford, K
Harrison, TJ
Hawkes, CM
Knowles, DJ
Morgan, SE
Penny, RC
Watson, AT
Watson, NK
Goetzen, K
Held, T
Koch, H
Lewandowski, B
Pelizaeus, M
Peters, K
Schmuecker, H
Steinke, M
Boyd, JT
Chevalier, N
Cottingham, WN
Kelly, MP
Latham, TE
Mackay, C
Wilson, FF
Abe, K
Cuhadar-Donszelmann, T
Hearty, C
Mattison, TS
McKenna, JA
Thiessen, D
Kyberd, P
McKemey, AK
Teodorescu, L
Blinov, VE
Bukin, AD
Golubev, VB
Ivanchenko, VN
Kravchenko, EA
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Yushkov, AN
Best, D
Bruinsma, M
Chao, M
Kirkby, D
Lankford, AJ
Mandelkern, M
Mommsen, RK
Roethel, W
Stoker, DP
Buchanan, C
Hartfiel, BL
Gary, JW
Layter, J
Shen, BC
Wang, K
del Re, D
Hadavand, HK
Hill, EJ
MacFarlane, DB
Paar, HP
Rahatlou, S
Sharma, V
Berryhill, JW
Campagnari, C
Dahmes, B
Levy, SL
Long, O
Lu, A
Mazur, MA
Richman, JD
Verkerke, W
Beck, TW
Beringer, J
Eisner, AM
Heusch, CA
Lockman, WS
Schalk, T
Schmitz, RE
Schumm, BA
Seiden, A
Spradlin, P
Turri, M
Walkowiak, W
Williams, DC
Wilson, MG
Albert, J
Chen, E
Dubois-Felsmann, GP
Dvoretskii, A
Erwin, RJ
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Ryd, A
Samuel, A
Yang, S
Jayatilleke, S
Mancinelli, G
Meadows, BT
Sokoloff, MD
Abe, T
Blanc, F
Bloom, P
Chen, S
Clark, PJ
Ford, WT
Nauenberg, U
Olivas, A
Rankin, P
Roy, J
Smith, JG
van Hoek, WC
Zhang, L
Harton, JL
Hu, T
Soffer, A
Toki, WH
Wilson, RJ
Zhang, J
Altenburg, D
Brandt, T
Brose, J
Colberg, T
Dickopp, M
Dubitzky, RS
Hauke, A
Lacker, HM
Maly, E
Muller-Pfefferkorn, R
Nogowski, R
Otto, S
Schubert, J
Schubert, KR
Schwierz, R
Spaan, B
Wilden, L
Bernard, D
Bonneaud, GR
Brochard, F
Cohen-Tanugi, J
Grenier, P
Thiebaux, C
Vasileiadis, G
Verderi, M
Khan, A
Lavin, D
Muheim, F
Playfer, S
Swain, JE
Andreotti, M
Azzolini, V
Bettoni, D
Bozzi, C
Calabrese, R
Cibinetto, G
Luppi, E
Negrini, M
Piemontese, L
Sarti, A
Treadwell, E
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Falciai, D
Finocchiaro, G
Patteri, P
Piccolo, M
Zallo, A
Buzzo, A
Capra, R
Contri, R
Crosetti, G
Lo Vetere, M
Macri, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Bailey, S
Morii, M
Won, E
Bhimji, W
Bowerman, DA
Dauncey, PD
Egede, U
Eschrich, I
Gaillard, JR
Morton, GW
Nash, JA
Taylor, GP
Grenier, GJ
Lee, SJ
Mallik, U
Cochran, J
Crawley, HB
Lamsa, J
Meyer, WT
Prell, S
Rosenberg, EI
Yi, J
Davier, M
Grosdidier, G
Hocker, A
Laplace, S
Le Diberder, F
Lepeltier, V
Lutz, AM
Petersen, TC
Plaszczynski, S
Schune, MH
Tantot, L
Wormser, G
Brigljevic, V
Cheng, CH
Lange, DJ
Simani, MC
Wright, DM
Bevan, AJ
Coleman, JP
Fry, JR
Gabathuler, E
Gamet, R
Kay, M
Parry, RJ
Payne, DJ
Sloane, RJ
Touramanis, C
Back, JJ
Harrison, PF
Shorthouse, HW
Vidal, PB
Brown, CL
Cowan, G
Flack, RL
Flaecher, HU
George, S
Green, MG
Kurup, A
Marker, CE
McMahon, TR
Ricciardi, S
Salvatore, F
Vaitsas, G
Winter, MA
Brown, D
Davis, CL
Allison, J
Barlow, NR
Barlow, RJ
Hart, PA
Hodgkinson, MC
Jackson, F
Lafferty, GD
Lyon, AJ
Weatherall, JH
Williams, JC
Farbin, A
Jawahery, A
Kovalskyi, D
Lae, CK
Lillard, V
Roberts, DA
Blaylock, G
Dallapiccola, C
Flood, KT
Hertzbach, SS
Kofler, R
Koptchev, VB
Moore, TB
Saremi, S
Staengle, H
Willocq, S
Cowan, R
Sciolla, G
Taylor, F
Yamamoto, RK
Mangeol, DJJ
Patel, PM
Robertson, SH
Lazzaro, A
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Reidy, J
Sanders, DA
Summers, DJ
Zhao, HW
Brunet, S
Cote-Ahern, D
Taras, P
Nicholson, H
Cartaro, C
Cavallo, N
De Nardo, G
Fabozzi, F
Gatto, C
Lista, L
Paolucci, P
Piccolo, D
Sciacca, C
Baak, MA
Raven, G
LoSecco, JM
Gabriel, TA
Brau, B
Gan, KK
Honscheid, K
Hufnagel, D
Kagan, H
Kass, R
Pulliam, T
Wong, QK
Brau, J
Frey, R
Igonkina, O
Potter, CT
Sinev, NB
Strom, D
Torrence, E
Colecchia, F
Dorigo, A
Galeazzi, F
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Tiozzo, G
Voci, C
Benayoun, M
Briand, H
Chauveau, J
David, P
de la Vaissiere, C
Del Buono, L
Hamon, O
John, MJJ
Leruste, P
Ocariz, J
Pivk, M
Roos, L
Stark, J
T'Jampens, S
Therin, G
Manfredi, PF
Re, V
Behera, PK
Gladney, L
Guo, QH
Panetta, J
Anulli, F
Biasini, M
Peruzzi, IM
Pioppi, M
Angelini, C
Batignani, G
Bettarini, S
Bondioli, M
Bucci, F
Calderini, G
Carpinelli, M
Del Gamba, V
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Martinez-Vidal, F
Morganti, M
Neri, N
Paoloni, E
Rama, M
Rizzo, G
Sandrelli, F
Walsh, J
Haire, M
Judd, D
Paick, K
Wagoner, DE
Danielson, N
Elmer, P
Lu, C
Miftakov, V
Olsen, J
Smith, AJS
Tanaka, HA
Varnes, EW
Bellini, F
Cavoto, G
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Mazzoni, MA
Morganti, S
Pierini, M
Piredda, G
Tehrani, FS
Voena, C
Christ, S
Wagner, G
Waldi, R
Adye, T
De Groot, N
Franek, B
Geddes, NI
Gopal, GP
Olaiya, EO
Xella, SM
Aleksan, R
Emery, S
Gaidot, A
Ganzhur, SF
Giraud, PF
de Monchenault, GH
Kozanecki, W
Langer, M
Legendre, M
London, GW
Mayer, B
Schott, G
Vasseur, G
Yeche, C
Zito, M
Purohit, MV
Weidemann, AW
Yumiceva, FX
Aston, D
Bartoldus, R
Berger, N
Boyarski, AM
Buchmueller, OL
Convery, MR
Cristinziani, M
Dong, D
Dorfan, J
Dujmic, D
Dunwoodie, W
Elsen, EE
Field, RC
Glanzman, T
Gowdy, SJ
Grauges-Pous, E
Hadig, T
Halyo, V
Hryn'ova, T
Innes, WR
Jessop, CP
Kelsey, MH
Kim, P
Kocian, ML
Langenegger, U
Leith, DWGS
Libby, J
Luitz, S
Luth, V
Lynch, HL
Marsiske, H
Messner, R
Muller, DR
O'Grady, CP
Ozcan, VE
Perazzo, A
Perl, M
Petrak, S
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Simi, G
Snyder, A
Soha, A
Stelzer, J
Su, D
Sullivan, MK
Va'vra, J
Wagner, SR
Weaver, M
Weinstein, AJR
Wisniewski, WJ
Wright, DH
Young, CC
Burchat, PR
Edwards, AJ
Meyer, TI
Petersen, BA
Roat, C
Ahmed, M
Ahmed, S
Alam, MS
Ernst, JA
Saeed, MA
Saleem, M
Wappler, FR
Bugg, W
Krishnamurthy, M
Spanier, SM
Eckmann, R
Kim, H
Ritchie, JL
Schwitters, RF
Izen, JM
Kitayama, I
Lou, XC
Ye, S
Bianchi, F
Bona, M
Gallo, F
Gamba, D
Borean, C
Bosisio, L
Della Ricca, G
Dittongo, S
Grancagnolo, S
Lanceri, L
Poropat, P
Vitale, L
Vuagnin, G
Panvini, RS
Banerjee, S
Brown, CM
Fortin, D
Jackson, PD
Kowalewski, R
Roney, JM
Band, HR
Dasu, S
Datta, M
Eichenbaum, AM
Johnson, JR
Kutter, PE
Li, H
Liu, R
Di Lodovico, F
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Sekula, SJ
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Neal, H
CA BABAR Collaboration
TI Measurement of time-dependent CP asymmetries and constraints on sin(2
beta+gamma) with partial reconstruction of B-0 -> D-*-/+pi(+/-) decays
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
AB We present a measurement of time-dependent CP-violating asymmetries in decays of neutral B mesons to the final states D(*-/+)pi(+/-), using approximately 82x10(6) B (B) over bar events recorded by the BABAR experiment at the PEP-II e(+)e(-) storage ring. Events containing these decays are selected with a partial reconstruction technique, in which only the high-momentum pi(+/-) from the B decay and the low-momentum pi(-/+) from the D*-/+ decay are used. We measure the amplitude of the asymmetry to be -0.063+/-0.024(stat)+/-0.014(syst) and compute bounds on \sin(2beta+gamma)\.
C1 Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France.
Univ Bari, Dipartimento Fis, I-70126 Bari, Italy.
Ist Nazl Fis Nucl, I-70126 Bari, Italy.
Inst High Energy Phys, Beijing 100039, Peoples R China.
Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany.
Univ Bristol, Bristol BS8 1TL, Avon, England.
Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
Brunel Univ, Uxbridge UB8 3PH, Middx, England.
Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
Univ Calif Irvine, Irvine, CA 92697 USA.
Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
Univ Calif Riverside, Riverside, CA 92521 USA.
Univ Calif San Diego, La Jolla, CA 92093 USA.
Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA.
CALTECH, Pasadena, CA 91125 USA.
Univ Cincinnati, Cincinnati, OH 45221 USA.
Univ Colorado, Boulder, CO 80309 USA.
Colorado State Univ, Ft Collins, CO 80523 USA.
Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
Ecole Polytech, LLR, F-91128 Palaiseau, France.
Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy.
Ist Nazl Fis Nucl, I-44100 Ferrara, Italy.
Florida A&M Univ, Tallahassee, FL 32307 USA.
Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy.
Ist Nazl Fis Nucl, I-16146 Genoa, Italy.
Harvard Univ, Cambridge, MA 02138 USA.
Univ London Imperial Coll Sci Technol & Med, London SW7 2BW, England.
Univ Iowa, Iowa City, IA 52242 USA.
Iowa State Univ, Ames, IA 50011 USA.
Lab Accelerateur Lineaire, F-91898 Orsay, France.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Univ Liverpool, Liverpool L69 3BX, Merseyside, England.
Univ London, Queen Mary, London E1 4NS, England.
Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England.
Univ Louisville, Louisville, KY 40292 USA.
Univ Manchester, Manchester M13 9PL, Lancs, England.
Univ Maryland, College Pk, MD 20742 USA.
Univ Massachusetts, Amherst, MA 01003 USA.
MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
McGill Univ, Montreal, PQ H3A 2T8, Canada.
Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
Ist Nazl Fis Nucl, I-20133 Milan, Italy.
Univ Mississippi, University, MS 38677 USA.
Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada.
Mt Holyoke Coll, S Hadley, MA 01075 USA.
Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy.
Ist Nazl Fis Nucl, I-80126 Naples, Italy.
Natl Inst Nucl Phys & High Energy Phys, NIKHEF, NL-1009 DB Amsterdam, Netherlands.
Univ Notre Dame, Notre Dame, IN 46556 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
Ohio State Univ, Columbus, OH 43210 USA.
Univ Oregon, Eugene, OR 97403 USA.
Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
Ist Nazl Fis Nucl, I-35131 Padua, Italy.
Univ Paris 06, Lab Phys Nucl HE, F-75252 Paris, France.
Univ Paris 07, Lab Phys Nucl HE, F-75252 Paris, France.
Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy.
Ist Nazl Fis Nucl, I-27100 Pavia, Italy.
Univ Penn, Philadelphia, PA 19104 USA.
Univ Perugia, I-06100 Perugia, Italy.
Ist Nazl Fis Nucl, I-06100 Perugia, Italy.
Univ Pisa, Dipartimento Fis, Scuola Normale Super Pisa, I-56127 Pisa, Italy.
Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
Prairie View A&M Univ, Prairie View, TX 77446 USA.
Princeton Univ, Princeton, NJ 08544 USA.
Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
Ist Nazl Fis Nucl, I-00185 Rome, Italy.
Univ Rostock, D-18051 Rostock, Germany.
Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France.
Univ S Carolina, Columbia, SC 29208 USA.
Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
Stanford Univ, Stanford, CA 94305 USA.
SUNY Albany, Albany, NY 12222 USA.
Univ Tennessee, Knoxville, TN 37996 USA.
Univ Texas, Austin, TX 78712 USA.
Univ Texas, Richardson, TX 75083 USA.
Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
Ist Nazl Fis Nucl, I-10125 Turin, Italy.
Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
Ist Nazl Fis Nucl, I-34127 Trieste, Italy.
Vanderbilt Univ, Nashville, TN 37235 USA.
Univ Victoria, Victoria, BC V8W 3P6, Canada.
Univ Wisconsin, Madison, WI 53706 USA.
Yale Univ, New Haven, CT 06511 USA.
Univ Basilicata, I-85100 Potenza, Italy.
Univ Valencia, CSIC, Inst Fis Corpuscular, IFIC, Valencia, Spain.
RP Aubert, B (reprint author), Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France.
RI Lusiani, Alberto/A-3329-2016; Morandin, Mauro/A-3308-2016; Della Ricca,
Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; Calcaterra,
Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; de Sangro,
Riccardo/J-2901-2012; M, Saleem/B-9137-2013; Sarti, Alessio/I-2833-2012;
Cavallo, Nicola/F-8913-2012; Peters, Klaus/C-2728-2008; de Groot,
Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009;
crosetti, nanni/H-3040-2011; Neri, Nicola/G-3991-2012; Forti,
Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani,
Claudia/C-5223-2009; Saeed, Mohammad Alam/J-7455-2012; Negrini,
Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Luppi,
Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese,
Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal,
F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere,
Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani,
Alberto/N-2976-2015
OI Lusiani, Alberto/0000-0002-6876-3288; Morandin,
Mauro/0000-0003-4708-4240; Della Ricca, Giuseppe/0000-0003-2831-6982; Di
Lodovico, Francesca/0000-0003-3952-2175; Calcaterra,
Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; de
Sangro, Riccardo/0000-0002-3808-5455; Sarti,
Alessio/0000-0001-5419-7951; Peters, Klaus/0000-0001-7133-0662; Bellini,
Fabio/0000-0002-2936-660X; Neri, Nicola/0000-0002-6106-3756; Forti,
Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163;
Patrignani, Claudia/0000-0002-5882-1747; Saeed, Mohammad
Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963; Monge,
Maria Roberta/0000-0003-1633-3195; Luppi, Eleonora/0000-0002-1072-5633;
Calabrese, Roberto/0000-0002-1354-5400; Mir,
Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal,
F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere,
Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304;
Lusiani, Alberto/0000-0002-6876-3288
NR 18
TC 12
Z9 12
U1 0
U2 3
PU AMERICAN 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 JUN 25
PY 2004
VL 92
IS 25
AR 251802
DI 10.1103/PhysRevLett.92.251802
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 832KJ
UT WOS:000222266100012
ER
PT J
AU Evans, AO
Paul, ES
Simpson, J
Riley, MA
Appelbe, DE
Campbell, DB
Choy, PTW
Clark, RM
Cromaz, M
Fallon, P
Gorgen, A
Joss, DT
Lee, IY
Macchiavelli, AO
Nolan, PJ
Pipidis, A
Ward, D
Ragnarsson, I
Saric, F
AF Evans, AO
Paul, ES
Simpson, J
Riley, MA
Appelbe, DE
Campbell, DB
Choy, PTW
Clark, RM
Cromaz, M
Fallon, P
Gorgen, A
Joss, DT
Lee, IY
Macchiavelli, AO
Nolan, PJ
Pipidis, A
Ward, D
Ragnarsson, I
Saric, F
TI High-spin structure beyond band termination in Er-157
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ROTATIONAL BANDS; NUCLEI; EXCITATIONS
AB The angular-momentum induced transition from a deformed state of collective rotation to a noncollective configuration has been studied. In Er-157 this transition manifests itself as favored band termination near I=45 (h) over bar. The feeding of these band terminating states has been investigated for the first time using the Gammasphere spectrometer. Many weakly populated states lying at high excitation energy that decay into these special states have been discovered. Cranked Nilsson-Strutinsky calculations suggest that these states arise from weakly collective "core-breaking" configurations.
C1 Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.
SERC, Daresbury Lab, CCLRC, Warrington WA4 4AD, Cheshire, England.
Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
Lund Inst Technol, Dept Math Phys, S-22100 Lund, Sweden.
RP Evans, AO (reprint author), Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.
NR 20
TC 24
Z9 24
U1 0
U2 0
PU AMERICAN 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 JUN 25
PY 2004
VL 92
IS 25
AR 252502
DI 10.1103/PhysRevLett.92.252502
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 832KJ
UT WOS:000222266100016
PM 15245000
ER
PT J
AU Goto, T
Kimura, T
Lawes, G
Ramirez, AP
Tokura, Y
AF Goto, T
Kimura, T
Lawes, G
Ramirez, AP
Tokura, Y
TI Ferroelectricity and giant magnetocapacitance in perovskite rare-earth
manganites
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID CALCIUM-CHLORIDE DIHYDRATE; DEVILS STAIRCASE; TRANSITION; PHASE
AB The relationships among magnetism, lattice modulation, and dielectric properties have been investigated for RMnO3 (R=Eu, Gd, Tb, and Dy). These compounds show a transition to an incommensurate lattice structure below their Neel temperature, and subsequently undergo an incommensurate-commensurate (IC-C) phase transition. For TbMnO3 and DyMnO3 it was found that the IC-C transition is accompanied by a ferroelectric transition, associated with a lattice modulation in the C phase. DyMnO3 shows a gigantic magnetocapacitance with a change of dielectric constant up to Deltaepsilon/epsilonsimilar to500%.
C1 Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA.
Japan Sci & Technol Agcy, ERATO, Spin Superstruct Project, Tsukuba, Ibaraki 3058562, Japan.
RP Goto, T (reprint author), Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan.
RI Tokura, Yoshinori/C-7352-2009
NR 19
TC 661
Z9 675
U1 26
U2 188
PU AMERICAN 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 JUN 25
PY 2004
VL 92
IS 25
AR 257201
DI 10.1103/PhysRevLett.92.257201
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 832KJ
UT WOS:000222266100072
PM 15245056
ER
PT J
AU Lushnikov, PM
Rose, HA
AF Lushnikov, PM
Rose, HA
TI Instability versus equilibrium propagation of a laser beam in plasma
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID INERTIAL CONFINEMENT FUSION; INDUCED SPATIAL INCOHERENCE; STIMULATED
BRILLOUIN; HOT-SPOTS; FILAMENTATION; SCATTERING; MEDIA
AB We obtain, for the first time, an analytic theory of the forward stimulated Brillouin scattering instability of a spatially and temporally incoherent laser beam that controls the transition between statistical equilibrium and nonequilibrium (unstable) self-focusing regimes of beam propagation. The stability boundary may be used as a comprehensive guide for inertial confinement fusion designs. Well into the stable regime, an analytic expression for the angular diffusion coefficient is obtained, which provides an essential correction to a geometric optic approximation for beam propagation.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
LD Landau Theoret Phys Inst, Moscow 119334, Russia.
RP Lushnikov, PM (reprint author), Los Alamos Natl Lab, Div Theoret, MS-B213, Los Alamos, NM 87545 USA.
EM har@lanl.gov
RI Lushnikov, Pavel/I-2304-2013
NR 18
TC 15
Z9 15
U1 0
U2 0
PU AMERICAN 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 JUN 25
PY 2004
VL 92
IS 25
AR 255003
DI 10.1103/PhysRevLett.92.255003
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 832KJ
UT WOS:000222266100034
PM 15245018
ER
PT J
AU Sauer, MC
Crowell, RA
Shkrob, IA
AF Sauer, MC
Crowell, RA
Shkrob, IA
TI Electron photodetachment from aqueous anions. 1. Quantum yields for
generation of hydrated electron by 193 and 248 nm laser photoexcitation
of miscellaneous inorganic anions
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Review
ID ULTRAVIOLET SOLUTION SPECTROSCOPY; UV SOLUTION SPECTROSCOPY; EXCITED
STATE CHEMISTRY; TO-SOLVENT SPECTRA; PULSE-RADIOLYSIS; FLASH-PHOTOLYSIS;
LIQUID WATER; ABSORPTION SPECTRUM; SOLVATED ELECTRONS;
MOLECULAR-DYNAMICS
AB Time-resolved transient absorption spectroscopy has been used to determine quantum yields for electron photodetachment in 193 nm and (where possible) 248 nm laser excitation of miscellaneous aqueous anions, including hexacyanoferrate(II), sulfate, halide anions (Cl-, Br-, and I-), pseudohalide anions (OH-, HS-, and CNS-), and several common inorganic anions for which no quantum yields have been reported heretofore: SO32-, NO2-, NO3-, ClO3-, and ClO4-. Molar extinction coefficients for these anions and photoproducts of electron detachment from these anions at the excitation wavelengths were also determined. These results are discussed in the context of recent ultrafast kinetic studies and compared with the previous data obtained by product analyses. We suggest using electron photodetachment from the aqueous halide and pseudohalide anions as actinometric standards for time-resolved studies of aqueous photosystems in the UV.
C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
RP Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM shkrob@anl.gov
NR 107
TC 46
Z9 47
U1 1
U2 43
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 JUN 24
PY 2004
VL 108
IS 25
BP 5490
EP 5502
DI 10.1021/jp049722t
PG 13
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 830MH
UT WOS:000222125800026
ER
PT J
AU Sapochak, LS
Falkowitz, A
Ferris, KF
Steinberg, S
Burrows, PE
AF Sapochak, LS
Falkowitz, A
Ferris, KF
Steinberg, S
Burrows, PE
TI Supramolecular structures of zinc (II) (8-quinolinolato) chelates
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID MOLECULAR-STRUCTURE; ELECTRONIC STATES; BASIS-SETS; ALUMINUM;
POLYMORPHS; CONTINUUM; SOLVENT; COMPLEX; ALQ(3)
AB We investigate the oligomeric purity and stability of zinc (8-quinolinotato) (Znq(2)) and its methylated derivatives (nMeq(2)Zn, n = 2, 4, 5) through a combination of theoretical modeling of oligomerization energetics leading to supramolecular structures and experimental size-exclusion chromatography studies. Gas- and solution-phase (CHCl3) formation energies for dimeric, trimeric, and tetrameric species are reported. Favorable gas-phase thermodynamics were calculated and found to favor tetrameric structures for all Znq(2) chelates (similar to-50 kcal/mol for monomer dimerization to similar to-35 kcal/mol for dimer dimerization), with the exception of 2Meq(2)Zn, which gave lower formation energies by 30-45% due to steric hindrance. Solvation model computations indicate that these energies are reduced by similar to10-25% with the introduction of a dielectric medium. Computed structural parameters for the basic Zn-O core structure formed via bridging of phenolato oxygens do not change significantly as oligomer growth progresses. Size-exclusion chromatography experiments of crystalline and amorphous films (vapor deposited) dissolved in CHCl3 or CHCl3/DMS0 mixtures showed that the dominant species for Znq(2), 4Meq(2)Zn, and 5Meq(2)Zn is tetrameric, but partial disassociation to monomers can occur in the presence of nucleophilic solvent. The sterically hindered 2Meq(2)Zn was monomeric in all solvent systems. Implications for organic light-emitting devices using these materials are discussed.
C1 Pacific NW Natl Lab, Div Mat Sci, Richland, WA 99352 USA.
Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA.
RP Pacific NW Natl Lab, Div Mat Sci, Richland, WA 99352 USA.
EM linda.sapochak@pnl.gov
NR 28
TC 9
Z9 9
U1 0
U2 2
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 JUN 24
PY 2004
VL 108
IS 25
BP 8558
EP 8566
DI 10.1021/jp037074s
PG 9
WC Chemistry, Physical
SC Chemistry
GA 830MI
UT WOS:000222125900009
ER
PT J
AU Katz, HE
Siegrist, T
Lefenfeld, M
Gopalan, P
Mushrush, M
Ocko, B
Gang, O
Jisrawl, N
AF Katz, HE
Siegrist, T
Lefenfeld, M
Gopalan, P
Mushrush, M
Ocko, B
Gang, O
Jisrawl, N
TI Mesophase transitions, surface functionalization, and growth mechanism
of semiconducting 6PTTP6 films from solution
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID FIELD-EFFECT TRANSISTORS; LARGE-AREA; ELECTRONICS; PHENYLENE; POLYMERS;
DISPLAYS
AB The grain structure is compared for films of the organic semiconductor 6PTTP6 prepared in the open air and in a closed, static atmosphere saturated with xylene vapor. The effect of surface functional groups affixed to the dielectric substrate on the grain appearance and film mobility is probed, to determine optimal fabrication conditions for films with usable mobility, high on/off ratio, and good uniformity. A single-crystal device, also obtained from solution deposition under a particular set of conditions, is characterized and displays an expected higher mobility, > 0.1 cm(2)/Vs. Mesophases are identified in the presence and absence of the xylene and tentatively identified through polarized optical microscopy (POM). Finally, a preliminary observation of the film evolution using an in situ X-ray diffraction (XRD) technique is reported, and lattice spacings are assigned.
C1 Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA.
Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Katz, HE (reprint author), Bell Labs, Lucent Technol, 600 Mt Ave, Murray Hill, NJ 07974 USA.
EM hek@lucent.com
RI Katz, Howard/A-3352-2010
NR 14
TC 28
Z9 28
U1 0
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 JUN 24
PY 2004
VL 108
IS 25
BP 8567
EP 8571
DI 10.1021/jp037068w
PG 5
WC Chemistry, Physical
SC Chemistry
GA 830MI
UT WOS:000222125900010
ER
PT J
AU Brousmiche, DW
Serin, JM
Frechet, JMJ
He, GS
Lin, TC
Chung, SJ
Prasad, PN
Kannan, R
Tan, LS
AF Brousmiche, DW
Serin, JM
Frechet, JMJ
He, GS
Lin, TC
Chung, SJ
Prasad, PN
Kannan, R
Tan, LS
TI Fluorescence resonance energy transfer in novel multiphoton absorbing
dendritic structures
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID ABSORPTION CROSS-SECTION; OPTICAL-DATA STORAGE; 2-PHOTON ABSORPTION;
2-PHOTON-ABSORBING CHROMOPHORES; LASING PROPERTIES; ORGANIC MATERIALS;
DYE-SOLUTION; MICROFABRICATION; SPECTROSCOPY; MOLECULES
AB A series of small dendritic structures containing one of two efficient multiphoton absorbing dyes at the periphery and a nile red derivative at the core have been synthesized. These molecules display efficient ( > 96%) fluorescence resonance energy transfer (FRET) from the periphery to the core on selective excitation of the two-photon absorbing chromophore by either UV (linear absorption) or high-intensity IR (nonlinear absorption) radiation. In addition, a significant increase in core emission is observed on excitation of the peripheral chromophores, compared to direct excitation of the core. This "antenna effect" essentially doubles between increasing dendrimer generations within a series. The combination of the ability of the peripheral chromophores to absorb high-intensity IR radiation, coupled with a very efficient energy transfer process and a significant increase in the fluorescence of the acceptor chromophore, makes these molecules potentially useful for a variety of applications, including optical power limiting and biomedical imaging.
C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
SUNY Buffalo, Inst Lasers Photon & Biophoton, Berkeley, CA 94720 USA.
Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA.
MLBP, AFRL, Polymer Branch, Wright Patterson AFB, OH 45433 USA.
RP Frechet, JMJ (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM frechet@cchem.berkeley.edu
RI Tan, Loon-Seng/F-6985-2012;
OI Tan, Loon-Seng/0000-0002-2134-9290; Frechet, Jean /0000-0001-6419-0163
NR 49
TC 70
Z9 70
U1 1
U2 11
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 JUN 24
PY 2004
VL 108
IS 25
BP 8592
EP 8600
DI 10.1021/jp049948w
PG 9
WC Chemistry, Physical
SC Chemistry
GA 830MI
UT WOS:000222125900014
ER
PT J
AU Fifield, LS
Dalton, LR
Addleman, RS
Galhotra, RA
Engelhard, MH
Fryxell, GE
Aardahl, CL
AF Fifield, LS
Dalton, LR
Addleman, RS
Galhotra, RA
Engelhard, MH
Fryxell, GE
Aardahl, CL
TI Noncovalent functionalization of carbon nanotubes with molecular anchors
using supercritical fluids
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID POLYCYCLIC AROMATIC-HYDROCARBONS; SIDEWALL-FUNCTIONALIZATION; SOLIDS;
SOLUBILITIES; PYRENE; IMMOBILIZATION; ELECTRODE; DIOXIDE; LIQUIDS
AB In this article, we describe a facile and effective method for the modification of multiwall carbon nanotubes with molecular anchor molecules using supercritical fluids (SCFs). Through choice of deposition conditions, the degree of loading in these nanotube-anchor structures can be controlled to achieve sub-monolayer, monolayer, or greater-than-monolayer coverage. This level of control represents a potential advantage of SCFs over liquid solvents for anchor deposition. Employment of the described technique is expected to enable the direct addition of desired chemical functionality to many carbon nanotube structures for a variety of applications.
C1 Pacific NW Natl Lab, Richland, WA 99352 USA.
Univ Washington, Dept Chem, Seattle, WA 98195 USA.
RP Pacific NW Natl Lab, Richland, WA 99352 USA.
EM Christopher.Aardahl@pnl.gov
RI Engelhard, Mark/F-1317-2010; Fifield, Leonard/E-9773-2010;
OI Fifield, Leonard/0000-0002-7432-5356; Engelhard,
Mark/0000-0002-5543-0812
NR 36
TC 32
Z9 33
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 JUN 24
PY 2004
VL 108
IS 25
BP 8737
EP 8741
DI 10.1021/jp0379771
PG 5
WC Chemistry, Physical
SC Chemistry
GA 830MI
UT WOS:000222125900033
ER
PT J
AU Bong, DTY
Chan, EWL
Diercks, R
Dosa, PI
Haley, MM
Matzger, AJ
Miljanic, OS
Vollhardt, KPC
Bond, AD
Teat, SJ
Stanger, A
AF Bong, DTY
Chan, EWL
Diercks, R
Dosa, PI
Haley, MM
Matzger, AJ
Miljanic, OS
Vollhardt, KPC
Bond, AD
Teat, SJ
Stanger, A
TI Syntheses of syn and anti doublebent [5]phenylene
SO ORGANIC LETTERS
LA English
DT Article
ID COBALT-CATALYZED COCYCLIZATION; HYDROCARBONS; CYCLOHEXATRIENE;
<7>PHENYLENE; <3>PHENYLENE; PHENYLENES; HELIPHENES; TOPOLOGY
AB [GRAPHICS]
The parent and dipropyl-substituted anti (1a,b) and syn doublebent (2a,b) [5]phenylenes have been assembled by CpCo-catalyzed double cyclization of regiospecifically constructed appropriate hexaynes. H-1 NMR, NICS, and an X-ray structural analysis of is reflect the aromatizing effect of double angular fusion on the central ring of the linear [3]phenylene substructure.
C1 Univ Calif Berkeley, Ctr New Direct Organ Synth, Dept Chem, Berkeley, CA 94720 USA.
Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA.
Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England.
CCLRC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England.
Technion Israel Inst Technol, Dept Chem, Inst Catalysis Sci & Technol, IL-32000 Haifa, Israel.
Technion Israel Inst Technol, Lise Meitner Minerva Ctr Computat Quantum Chem, IL-32000 Haifa, Israel.
RP Vollhardt, KPC (reprint author), Univ Calif Berkeley, Ctr New Direct Organ Synth, Dept Chem, Berkeley, CA 94720 USA.
EM kpcv@berkeley.edu
RI Bong, Dennis/B-8928-2009; Matzger, Adam/G-7497-2016; Bong,
Dennis/I-9517-2016
OI Matzger, Adam/0000-0002-4926-2752; Bong, Dennis/0000-0003-3778-9183
NR 22
TC 20
Z9 20
U1 1
U2 4
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 JUN 24
PY 2004
VL 6
IS 13
BP 2249
EP 2252
DI 10.1021/ol49225v
PG 4
WC Chemistry, Organic
SC Chemistry
GA 830JY
UT WOS:000222119400043
PM 15200332
ER
PT J
AU Chekanov, S
Derrick, M
Krakauer, D
Loizides, JH
Magill, S
Miglioranzi, S
Musgrave, B
Repond, J
Yoshida, R
Mattingly, MCK
Antonioli, P
Bari, G
Basile, M
Bellagamba, L
Boscherini, D
Bruni, A
Bruni, G
Romeo, GC
Cifarelli, L
Cindolo, F
Contin, A
Corradi, M
De Pasquale, S
Giusti, P
Iacobucci, G
Margotti, A
Montanari, A
Nania, R
Palmonari, F
Pesci, A
Sartorelli, G
Zichichi, A
Aghuzumtsyan, G
Bartsch, D
Brock, I
Goers, S
Hartmann, H
Hilger, E
Irrgang, P
Jakob, HP
Kind, O
Meyer, U
Paul, E
Rautenberg, J
Renner, R
Stifutkin, A
Tandler, J
Voss, KC
Wang, M
Weber, A
Bailey, DS
Brook, NH
Cole, JE
Heath, GP
Namsoo, T
Robins, S
Wing, A
Capua, M
Mastroberardino, A
Schioppa, M
Susinno, G
Kim, JY
Kim, YK
Lee, JH
Lim, IT
Pac, MY
Chwastowski, J
Eskreys, A
Figiel, J
Galas, A
Olkiewicz, K
Stopa, P
Zawiejski, L
Adamczyk, L
Bold, T
Grabowska-Bold, I
Kisielewska, D
Kowal, AM
Kowal, M
Kowalski, T
Przybycien, M
Suszycki, L
Szuba, D
Szuba, J
Kotanski, A
Slominski, W
Adler, V
Behrens, U
Bloch, I
Borras, K
Chiochia, V
Dannheim, D
Drews, G
Fourletova, J
Fricke, U
Geiser, A
Gottlicher, P
Gutsche, O
Haas, T
Hain, W
Hillert, S
Kahle, B
Kotz, U
Kowalski, H
Kramberger, G
Labes, H
Lelas, D
Lim, H
Lohr, B
Mankel, R
Melzer-Pellmann, IA
Nguyen, CN
Notz, D
Nuncio-Quiroz, AE
Polini, A
Raval, A
Rurua, L
Schneekloth, U
Stosslein, U
Wolf, G
Youngman, C
Zeuner, W
Schlenstedt, S
Barbagli, G
Gallo, E
Genta, C
Pelfer, PG
Bamberger, A
Benen, A
Karstens, F
Dobur, D
Vlasov, NN
Bell, M
Bussey, PJ
Doyle, AT
Ferrando, J
Hamilton, J
Hanlon, S
Saxon, DH
Skillicorn, IO
Gialas, I
Carli, T
Gosau, T
Holm, U
Krumnack, N
Lohrmann, E
Milite, M
Salehi, H
Schleper, R
Stonjek, S
Wichmann, K
Wick, K
Ziegler, A
Ziegler, A
Collins-Tooth, C
Foudas, C
Goncalo, R
Long, KR
Tapper, AD
Cloth, P
Filges, D
Kataoka, M
Nagano, K
Tokushuku, K
Yamada, S
Yamazaki, Y
Barakbaev, AN
Boos, EG
Pokrovskiy, NS
Zhautykov, BO
Son, D
Piotrzkowski, K
Barreiro, F
Glasman, C
Gonzalez, O
Labarga, L
del Peso, J
Tassi, E
Terron, J
Vazquez, M
Zambrana, M
Barbi, M
Corriveau, F
Gliga, S
Lainesse, J
Padhi, S
Stairs, DG
Walsh, R
Tsurugai, T
Antonov, A
Danilov, P
Dolgoshein, BA
Gladkov, D
Sosnovtsev, V
Suchkov, S
Dementiev, RK
Ermolov, PF
Golubkov, YA
Katkov, II
Khein, LA
Korzhavina, IA
Kuzmin, VA
Levchenko, BB
Lukina, OY
Proskuryakov, AS
Shcheglova, LM
Zotkin, SA
Coppola, N
Grijpink, S
Koffeman, E
Kooijman, P
Maddox, E
Pellegrino, A
Schagen, S
Tiecke, H
Velthuis, JJ
Wiggers, L
de Wolf, E
Brummer, N
Bylsma, B
Durkin, LS
Ling, TY
Cooper-Sarkar, AM
Cottrell, A
Devenish, RCE
Foster, B
Grzelak, G
Gwenlan, C
Patel, S
Straub, PB
Walczak, R
Bertolin, A
Brugnera, R
Carlin, R
Dal Corso, F
Dusini, S
Garfagnini, A
Limentani, S
Longhin, A
Parenti, A
Posocco, M
Stanco, L
Turcato, M
Heaphy, EA
Metlica, F
Oh, BY
Whitmore, JJ
Iga, Y
D'Agostini, G
Marini, G
Nigro, A
Cormack, C
Hart, JC
McCubbin, NA
Heusch, C
Park, IH
Pavel, N
Abramowicz, H
Gabareen, A
Kananov, S
Kreisel, A
Levy, A
Kuze, M
Fusayasu, T
Kagawa, S
Kohno, T
Tawara, T
Yamashita, T
Hamatsu, R
Hirose, T
Inuzuka, M
Kaji, H
Kitamura, S
Matsuzawa, K
Ferrero, MI
Monaco, V
Sacchi, R
Solano, A
Arneodo, M
Ruspa, M
Koop, T
Martin, JF
Mirea, A
Butterworth, JM
Hall-Wilton, R
Jones, TW
Lightwood, MS
Sutton, MR
Targett-Adams, C
Ciborowski, J
Ciesielski, R
Luzniak, P
Nowak, RJ
Pawlak, JM
Sztuk, J
Tymieniecka, T
Ukleja, A
Ukleja, J
Zarnecki, AF
Adamus, M
Plucinski, P
Eisenberg, Y
Gladilin, LK
Hochman, D
Karshon, U
Riveline, M
Kcira, D
Lammers, S
Li, L
Reeder, DD
Rosin, M
Savin, AA
Smith, WH
Deshpande, A
Dhawan, S
Bhadra, S
Catterall, CD
Fourletov, S
Hartner, G
Menary, S
Soares, M
Standage, J
Caldwell, A
Helbich, M
Liu, X
Mellado, B
Ning, Y
Paganis, S
Ren, Z
Schmidke, WB
Sciulli, F
AF Chekanov, S
Derrick, M
Krakauer, D
Loizides, JH
Magill, S
Miglioranzi, S
Musgrave, B
Repond, J
Yoshida, R
Mattingly, MCK
Antonioli, P
Bari, G
Basile, M
Bellagamba, L
Boscherini, D
Bruni, A
Bruni, G
Romeo, GC
Cifarelli, L
Cindolo, F
Contin, A
Corradi, M
De Pasquale, S
Giusti, P
Iacobucci, G
Margotti, A
Montanari, A
Nania, R
Palmonari, F
Pesci, A
Sartorelli, G
Zichichi, A
Aghuzumtsyan, G
Bartsch, D
Brock, I
Goers, S
Hartmann, H
Hilger, E
Irrgang, P
Jakob, HP
Kind, O
Meyer, U
Paul, E
Rautenberg, J
Renner, R
Stifutkin, A
Tandler, J
Voss, KC
Wang, M
Weber, A
Bailey, DS
Brook, NH
Cole, JE
Heath, GP
Namsoo, T
Robins, S
Wing, A
Capua, M
Mastroberardino, A
Schioppa, M
Susinno, G
Kim, JY
Kim, YK
Lee, JH
Lim, IT
Pac, MY
Chwastowski, J
Eskreys, A
Figiel, J
Galas, A
Olkiewicz, K
Stopa, P
Zawiejski, L
Adamczyk, L
Bold, T
Grabowska-Bold, I
Kisielewska, D
Kowal, AM
Kowal, M
Kowalski, T
Przybycien, M
Suszycki, L
Szuba, D
Szuba, J
Kotanski, A
Slominski, W
Adler, V
Behrens, U
Bloch, I
Borras, K
Chiochia, V
Dannheim, D
Drews, G
Fourletova, J
Fricke, U
Geiser, A
Gottlicher, P
Gutsche, O
Haas, T
Hain, W
Hillert, S
Kahle, B
Kotz, U
Kowalski, H
Kramberger, G
Labes, H
Lelas, D
Lim, H
Lohr, B
Mankel, R
Melzer-Pellmann, IA
Nguyen, CN
Notz, D
Nuncio-Quiroz, AE
Polini, A
Raval, A
Rurua, L
Schneekloth, U
Stosslein, U
Wolf, G
Youngman, C
Zeuner, W
Schlenstedt, S
Barbagli, G
Gallo, E
Genta, C
Pelfer, PG
Bamberger, A
Benen, A
Karstens, F
Dobur, D
Vlasov, NN
Bell, M
Bussey, PJ
Doyle, AT
Ferrando, J
Hamilton, J
Hanlon, S
Saxon, DH
Skillicorn, IO
Gialas, I
Carli, T
Gosau, T
Holm, U
Krumnack, N
Lohrmann, E
Milite, M
Salehi, H
Schleper, R
Stonjek, S
Wichmann, K
Wick, K
Ziegler, A
Ziegler, A
Collins-Tooth, C
Foudas, C
Goncalo, R
Long, KR
Tapper, AD
Cloth, P
Filges, D
Kataoka, M
Nagano, K
Tokushuku, K
Yamada, S
Yamazaki, Y
Barakbaev, AN
Boos, EG
Pokrovskiy, NS
Zhautykov, BO
Son, D
Piotrzkowski, K
Barreiro, F
Glasman, C
Gonzalez, O
Labarga, L
del Peso, J
Tassi, E
Terron, J
Vazquez, M
Zambrana, M
Barbi, M
Corriveau, F
Gliga, S
Lainesse, J
Padhi, S
Stairs, DG
Walsh, R
Tsurugai, T
Antonov, A
Danilov, P
Dolgoshein, BA
Gladkov, D
Sosnovtsev, V
Suchkov, S
Dementiev, RK
Ermolov, PF
Golubkov, YA
Katkov, II
Khein, LA
Korzhavina, IA
Kuzmin, VA
Levchenko, BB
Lukina, OY
Proskuryakov, AS
Shcheglova, LM
Zotkin, SA
Coppola, N
Grijpink, S
Koffeman, E
Kooijman, P
Maddox, E
Pellegrino, A
Schagen, S
Tiecke, H
Velthuis, JJ
Wiggers, L
de Wolf, E
Brummer, N
Bylsma, B
Durkin, LS
Ling, TY
Cooper-Sarkar, AM
Cottrell, A
Devenish, RCE
Foster, B
Grzelak, G
Gwenlan, C
Patel, S
Straub, PB
Walczak, R
Bertolin, A
Brugnera, R
Carlin, R
Dal Corso, F
Dusini, S
Garfagnini, A
Limentani, S
Longhin, A
Parenti, A
Posocco, M
Stanco, L
Turcato, M
Heaphy, EA
Metlica, F
Oh, BY
Whitmore, JJ
Iga, Y
D'Agostini, G
Marini, G
Nigro, A
Cormack, C
Hart, JC
McCubbin, NA
Heusch, C
Park, IH
Pavel, N
Abramowicz, H
Gabareen, A
Kananov, S
Kreisel, A
Levy, A
Kuze, M
Fusayasu, T
Kagawa, S
Kohno, T
Tawara, T
Yamashita, T
Hamatsu, R
Hirose, T
Inuzuka, M
Kaji, H
Kitamura, S
Matsuzawa, K
Ferrero, MI
Monaco, V
Sacchi, R
Solano, A
Arneodo, M
Ruspa, M
Koop, T
Martin, JF
Mirea, A
Butterworth, JM
Hall-Wilton, R
Jones, TW
Lightwood, MS
Sutton, MR
Targett-Adams, C
Ciborowski, J
Ciesielski, R
Luzniak, P
Nowak, RJ
Pawlak, JM
Sztuk, J
Tymieniecka, T
Ukleja, A
Ukleja, J
Zarnecki, AF
Adamus, M
Plucinski, P
Eisenberg, Y
Gladilin, LK
Hochman, D
Karshon, U
Riveline, M
Kcira, D
Lammers, S
Li, L
Reeder, DD
Rosin, M
Savin, AA
Smith, WH
Deshpande, A
Dhawan, S
Bhadra, S
Catterall, CD
Fourletov, S
Hartner, G
Menary, S
Soares, M
Standage, J
Caldwell, A
Helbich, M
Liu, X
Mellado, B
Ning, Y
Paganis, S
Ren, Z
Schmidke, WB
Sciulli, F
CA ZEUS Collabotation
TI Photoproduction of D*(+/-) mesons associated with a leading neutron
SO PHYSICS LETTERS B
LA English
DT Article
ID DEEP-INELASTIC SCATTERING; DIJET CROSS-SECTIONS; OF-MASS ENERGY;
TRIPLE-REGGEON MODEL; PI-PI RESONANCE; GEV-C; PARTON DISTRIBUTIONS;
INCLUSIVE REACTIONS; ZEUS EXPERIMENT; ABSORPTIVE CORRECTIONS
AB The photoproduction of D*(+/-)(2010) mesons associated with a leading neutron has been observed with the ZEUS detector in ep collisions at HERA using an integrated luminosity of 80 pb(-1). The neutron carries a large fraction, x(L) > 0.2, of the incoming proton beam energy and is detected at very small production angles, theta(n) < 0.8 mrad, an indication of peripheral scattering. The D* meson is centrally produced with pseudorapidity \eta\ < 1.5, and has a transverse momentum p(T) > 1.9 GeV, which is large compared to the average transverse momentum of the neutron of 0.22 GeV The ratio of neutron-tagged to inclusive D* production is 8.85 +/- 0.93(stat.)(-0.61)(+0.48)(syst.)% in the photon-proton center-of-mass energy range 130 < W < 280 Gev The data suggest that the presence of a hard scale enhances the fraction of events with a leading neutron in the final state. (C) 2004 Elsevier B.V. All rights reserved.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
Andrews Univ, Berrien Springs, MI 49104 USA.
Univ Bologna, Bologna, Italy.
INFM, Bologna, Italy.
Univ Bonn, Inst Phys, Bonn, Germany.
Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England.
Univ Calabria, Dept Phys, Cosenza, Italy.
Ist Nazl Fis Nucl, Cosenza, Italy.
Chonnam Natl Univ, Kwangju, South Korea.
Columbia Univ, Nevis Labs, Irvington, NY 10027 USA.
Inst Nucl Phys, Krakow, Poland.
AGH Univ Sci & Technol, Fac Phys & Nucl Tech, Krakow, Poland.
Jagiellonian Univ, Dept Phys, Krakow, Poland.
DESY, Deutsch Elektronen Synchrotron, Hamburg, Germany.
DESY Zeuthen, Zeuthen, Germany.
Univ Florence, Florence, Italy.
Ist Nazl Fis Nucl, Florence, Italy.
Univ Freiburg, Fak Phys, Freiburg, Germany.
Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland.
Univ Hamburg, Inst Phys Expt, Hamburg, Germany.
Univ London Imperial Coll Sci Technol & Med, High Energy Nucl Phys Grp, London, England.
Forschungszentrum Julich, Inst Kernphys, Julich, Germany.
KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki, Japan.
Minist Educ & Sci, Inst Phys & Technol, Alma Ata, Kazakhstan.
Kyungpook Natl Univ, Ctr High Energy Phys, Taejon, South Korea.
Catholic Univ Louvain, Inst Phys Nucl, Louvain, Belgium.
Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain.
McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
Meiji Gakuin Univ, Fac Gen Educ, Yokohama, Kanagawa, Japan.
Moscow Phys Engn Inst, Moscow, Russia.
Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow, Russia.
NIKHEF, Amsterdam, Netherlands.
Univ Amsterdam, Amsterdam, Netherlands.
Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
Univ Oxford, Dept Phys, Oxford, England.
Univ Padua, Dipartimento Fis, Padua, Italy.
Ist Nazl Fis Nucl, Padua, Italy.
Penn State Univ, Dept Phys, University Pk, PA 16802 USA.
Polytech Univ, Sagamihara, Kanagawa, Japan.
Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy.
Ist Nazl Fis Nucl, Rome, Italy.
Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA.
Ewha Womans Univ, Dept Phys, Seoul, South Korea.
Univ Siegen, Fachbereich Phys, Siegen, Germany.
Tel Aviv Univ, Sch Phys, Raymond & Beverly Sackler Fac Exact Sci, Tel Aviv, Israel.
Tokyo Inst Technol, Dept Phys, Tokyo, Japan.
Univ Tokyo, Dept Phys, Tokyo, Japan.
Tokyo Metropolitan Univ, Dept Phys, Tokyo, Japan.
Univ Turin, Turin, Italy.
Ist Nazl Fis Nucl, I-10125 Turin, Italy.
Univ Piemonte Orientale, Novara, Italy.
Ist Nazl Fis Nucl, Turin, Italy.
Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada.
UCL, Dept Phys & Astron, London, England.
Warsaw Univ, Inst Expt Phys, Warsaw, Poland.
Inst Nucl Studies, PL-00681 Warsaw, Poland.
Weizmann Inst Sci, Dept Particle Phys, Rehovot, Israel.
Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
Yale Univ, Dept Phys, New Haven, CT 06520 USA.
York Univ, Dept Phys, N York, ON M3J 1P3, Canada.
Univ Lodz, PL-90131 Lodz, Poland.
Nara Womens Univ, Nara 630, Japan.
RP Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI dusini, stefano/J-3686-2012; Goncalo, Ricardo/M-3153-2016; Li,
Liang/O-1107-2015; Capua, Marcella/A-8549-2015; Tassi,
Enrico/K-3958-2015; Gladilin, Leonid/B-5226-2011; De Pasquale,
Salvatore/B-9165-2008; Doyle, Anthony/C-5889-2009; collins-tooth,
christopher/A-9201-2012; Ferrando, James/A-9192-2012; Golubkov,
Yury/E-1643-2012; Levchenko, B./D-9752-2012; Proskuryakov,
Alexander/J-6166-2012; Dementiev, Roman/K-7201-2012; Wiggers,
Leo/B-5218-2015; Gliga, Sebastian/K-4019-2015
OI dusini, stefano/0000-0002-1128-0664; Goncalo,
Ricardo/0000-0002-3826-3442; Li, Liang/0000-0001-6411-6107; Capua,
Marcella/0000-0002-2443-6525; Arneodo, Michele/0000-0002-7790-7132;
Longhin, Andrea/0000-0001-9103-9936; Gutsche,
Oliver/0000-0002-8015-9622; Gladilin, Leonid/0000-0001-9422-8636; De
Pasquale, Salvatore/0000-0001-9236-0748; Doyle,
Anthony/0000-0001-6322-6195; Ferrando, James/0000-0002-1007-7816;
Wiggers, Leo/0000-0003-1060-0520; Gliga, Sebastian/0000-0003-1729-1070
NR 70
TC 15
Z9 15
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
EI 1873-2445
J9 PHYS LETT B
JI Phys. Lett. B
PD JUN 24
PY 2004
VL 590
IS 3-4
BP 143
EP 160
DI 10.1016/j.physletb.2004.03.076
PG 18
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 829HL
UT WOS:000222037900005
ER
PT J
AU Molchanov, VV
Alkhazov, G
Atamantchouk, AG
Balatz, MY
Bondar, NF
Casey, D
Cooper, PS
Dauwe, LJ
Davidenko, GV
Dersch, U
Dolgolenko, AG
Dzyubenko, GB
Edelstein, R
Emediato, L
Endler, AMF
Engelfried, J
Eschrich, I
Escobar, CO
Evdokimov, AV
Ferbel, T
Filimonov, IS
Garcia, FG
Gaspero, M
Giller, I
Golovtsov, VL
Gouffon, P
Gulmez, E
Hammer, C
Kangling, H
Iori, M
Jun, SY
Kaya, M
Kilmer, J
Kim, VT
Kochenda, LM
Konorov, I
Kozhevnikov, AP
Krivshich, AG
Kruger, H
Kubantsev, MA
Kubarovsky, VP
Kulyavtsev, AI
Kuropatkin, NP
Kurshetsov, VF
Kushnirenko, A
Kwan, S
Lach, J
Lamberto, A
Landsberg, LG
Larin, I
Leikin, EM
Yunshan, L
Luksys, M
Lungov, T
Maleev, VP
Mao, D
Chensheng, M
Zhenlin, M
Mathew, P
Mattson, M
Matveev, V
McCliment, E
Moinester, MA
Morelos, A
Mukhin, VA
Nelson, KD
Nemitkin, AV
Neoustroev, PV
Newsom, C
Nilov, AP
Nurushev, SB
Ocherashvili, A
Onel, Y
Ozel, E
Ozkorucuklu, S
Penzo, A
Petrenko, SV
Pogodin, P
Procario, M
Prutskoi, VA
Ramberg, E
Rappazzo, GF
Razmyslovich, BV
Rud, VI
Russ, J
Schiavon, P
Simon, J
Sitnikov, AI
Skow, D
Slattery, P
Smith, VJ
Srivastava, M
Steiner, V
Stepanov, V
Stutte, L
Svoiski, M
Terentyev, NK
Thomas, GP
Uvarov, LN
Vasiliev, AN
Vavilov, DV
Verebryusov, VS
Victorov, VA
Vishnyakov, VE
Vorobyov, AA
Vorwalter, K
You, J
Zhao, WH
Zheng, SC
Zhu, ZH
Zielinski, M
Zukanovich-Funchal, R
AF Molchanov, VV
Alkhazov, G
Atamantchouk, AG
Balatz, MY
Bondar, NF
Casey, D
Cooper, PS
Dauwe, LJ
Davidenko, GV
Dersch, U
Dolgolenko, AG
Dzyubenko, GB
Edelstein, R
Emediato, L
Endler, AMF
Engelfried, J
Eschrich, I
Escobar, CO
Evdokimov, AV
Ferbel, T
Filimonov, IS
Garcia, FG
Gaspero, M
Giller, I
Golovtsov, VL
Gouffon, P
Gulmez, E
Hammer, C
Kangling, H
Iori, M
Jun, SY
Kaya, M
Kilmer, J
Kim, VT
Kochenda, LM
Konorov, I
Kozhevnikov, AP
Krivshich, AG
Kruger, H
Kubantsev, MA
Kubarovsky, VP
Kulyavtsev, AI
Kuropatkin, NP
Kurshetsov, VF
Kushnirenko, A
Kwan, S
Lach, J
Lamberto, A
Landsberg, LG
Larin, I
Leikin, EM
Yunshan, L
Luksys, M
Lungov, T
Maleev, VP
Mao, D
Chensheng, M
Zhenlin, M
Mathew, P
Mattson, M
Matveev, V
McCliment, E
Moinester, MA
Morelos, A
Mukhin, VA
Nelson, KD
Nemitkin, AV
Neoustroev, PV
Newsom, C
Nilov, AP
Nurushev, SB
Ocherashvili, A
Onel, Y
Ozel, E
Ozkorucuklu, S
Penzo, A
Petrenko, SV
Pogodin, P
Procario, M
Prutskoi, VA
Ramberg, E
Rappazzo, GF
Razmyslovich, BV
Rud, VI
Russ, J
Schiavon, P
Simon, J
Sitnikov, AI
Skow, D
Slattery, P
Smith, VJ
Srivastava, M
Steiner, V
Stepanov, V
Stutte, L
Svoiski, M
Terentyev, NK
Thomas, GP
Uvarov, LN
Vasiliev, AN
Vavilov, DV
Verebryusov, VS
Victorov, VA
Vishnyakov, VE
Vorobyov, AA
Vorwalter, K
You, J
Zhao, WH
Zheng, SC
Zhu, ZH
Zielinski, M
Zukanovich-Funchal, R
TI Upper limit on the decay Sigma(1385)(-) -> Sigma(-)gamma and cross
section for gamma Sigma(-) -> Lambda pi(-)
SO PHYSICS LETTERS B
LA English
DT Article
DE hyperon radiative decay; Primakoff effect
ID NUCLEAR-COULOMB-FIELD; RADIATIVE DECAYS; ELECTROMAGNETIC DECAYS;
COHERENT PRODUCTION; QUARK-MODEL; DECUPLET HYPERONS; MAGNETIC-MOMENTS;
LIGHT MESONS; BARYONS; TRANSITIONS
AB Coherent Lambdapi(-) production on Pb of 600 GeV Sigma(-) hyperons has been studied with the SELEX facility at Fermilab. Using the Primakoff formalism, we set a 90% CL upper limit on the radiative decay width Gamma[Sigma(1385)(-) --> Sigma(-) gamma] < 9.5 keV, and estimate the cross section for gamma Sigma(-) --> Lambdapi(-) at roots approximate to 1.385 GeV to be 56 +/- 16 mub. Crown Copyright (C) 2004 Published by Elsevier B.V. All rights reserved.
C1 Inst High Energy Phys, Protvino, Russia.
Ball State Univ, Muncie, IN 47306 USA.
Bogazici Univ, TR-80815 Bebek, Turkey.
Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil.
Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
Inst High Energy Phys, Beijing 100039, Peoples R China.
Inst Theoret & Expt Phys, Moscow 117259, Russia.
Max Planck Inst Kernphys, D-69117 Heidelberg, Germany.
Moscow MV Lomonosov State Univ, Moscow, Russia.
Petersburg Nucl Phys Inst, St Petersburg, Russia.
Tel Aviv Univ, IL-69978 Tel Aviv, Israel.
Univ Autonoma San Luis Potosi, San Luis Potosi, Mexico.
Univ Fed Paraiba, BR-58059900 Joao Pessoa, Paraiba, Brazil.
Univ Bristol, Bristol BS8 1TL, Avon, England.
Univ Iowa, Iowa City, IA 52242 USA.
Univ Michigan, Flint, MI 48502 USA.
Univ Rochester, Rochester, NY 14627 USA.
Univ Roma La Sapienza, Rome, Italy.
Ist Nazl Fis Nucl, Rome, Italy.
Univ Sao Paulo, Sao Paulo, Brazil.
Univ Trieste, Trieste, Italy.
Ist Nazl Fis Nucl, Trieste, Italy.
RP Molchanov, VV (reprint author), Inst High Energy Phys, Protvino, Russia.
EM molchanov@mx.ihep.su
RI Zukanovich Funchal, Renata/C-5829-2013; Russ, James/P-3092-2014; Gulmez,
Erhan/P-9518-2015; Gouffon, Philippe/I-4549-2012; Maleev,
Victor/R-4140-2016
OI Zukanovich Funchal, Renata/0000-0001-6749-0022; Russ,
James/0000-0001-9856-9155; Gulmez, Erhan/0000-0002-6353-518X; Gouffon,
Philippe/0000-0001-7511-4115;
NR 35
TC 12
Z9 12
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 JUN 24
PY 2004
VL 590
IS 3-4
BP 161
EP 169
DI 10.1016/j.physletb.2004.04.006
PG 9
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 829HL
UT WOS:000222037900006
ER
PT J
AU Seweryniak, D
Woods, PJ
Blank, B
Carpenter, MP
Davinson, T
Freeman, SJ
Gorres, J
Heinz, A
Janssens, RVF
Mahmud, H
Khoo, TL
Liu, Z
Mukherjee, G
Rehm, E
Sarazin, F
Shergur, J
Shawcross, M
Sinha, S
Woehr, A
AF Seweryniak, D
Woods, PJ
Blank, B
Carpenter, MP
Davinson, T
Freeman, SJ
Gorres, J
Heinz, A
Janssens, RVF
Mahmud, H
Khoo, TL
Liu, Z
Mukherjee, G
Rehm, E
Sarazin, F
Shergur, J
Shawcross, M
Sinha, S
Woehr, A
TI Complete structure determination of the astrophysically important
nucleus Na-20 below the proton threshold
SO PHYSICS LETTERS B
LA English
DT Article
ID STELLAR REACTION-RATE; NE-19(P,GAMMA)NA-20; LEVEL
AB The fusion-evaporation reaction B-10(C-12,2n) was used to make the first observation of in-beam gamma decays from the astrophysically important nucleus Na-20, lying adjacent to the proton drip-line. All states below the proton threshold in Na-20 were populated and identified in the experiment. These include new levels, previously unresolved levels, and states located with improved energy precision. The level structure of Na-20, and its gamma transitions, are compared to the mirror partner F-20 measured simultaneously in this experiment. In particular, a high degree of energy stability is found for all negative parity states. These results are discussed in the context of the nuclear shell model. (C) 2004 Published by Elsevier B.V.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
Univ Notre Dame, Notre Dame, IN 46556 USA.
Univ Maryland, College Pk, MD 20742 USA.
CEN Bordeaux Gradignan, F-33175 Gradignan, France.
Univ Manchester, Manchester M13 9PL, Lancs, England.
RP Seweryniak, D (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM seweryhiak@phy.anl.gov
RI Freeman, Sean/B-1280-2010; Heinz, Andreas/E-3191-2014; Carpenter,
Michael/E-4287-2015
OI Freeman, Sean/0000-0001-9773-4921; Carpenter,
Michael/0000-0002-3237-5734
NR 11
TC 18
Z9 18
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 JUN 24
PY 2004
VL 590
IS 3-4
BP 170
EP 175
DI 10.1016/j.physletb.2004.03.090
PG 6
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 829HL
UT WOS:000222037900007
ER
PT J
AU Pan, FF
Peters-Lidard, CD
Sale, MJ
King, AW
AF Pan, FF
Peters-Lidard, CD
Sale, MJ
King, AW
TI A comparison of geographical information systems-based algorithms for
computing the TOPMODEL topographic index
SO WATER RESOURCES RESEARCH
LA English
DT Article
DE GIS; TOPMODEL; topographic index; single flow direction algorithm;
biflow direction algorithm; multiple flow direction algorithm
ID DIGITAL ELEVATION DATA; SPATIALLY-VARIABLE WATER; ENERGY-BALANCE
PROCESSES; MODELS; EXTRACTION; NETWORKS; SLOPE; AREAS; DEMS
AB [1] The performance of six geographical information systems (GIS)-based topographic index algorithms is evaluated by computing root-mean-square errors of the computed and the theoretical topographic indices of three idealized hillslopes: planar, convergent, and divergent. In addition to these three idealized cases, two divergent hillslopes with varying slopes, i.e., concave ( slopes decrease from top to bottom) and convex ( slopes increase from top to bottom) are also tested. The six GIS-based topographic index algorithms are combinations of flow direction and slope algorithms: i.e., single flow direction (SFD), biflow direction (BFD), and multiple flow direction (MFD) plus methods that determine slope values in flat areas, e. g., W-M method [Wolock and McCabe, 1995] and tracking flow direction (TFD) method. Two combinations of horizontal resolution and vertical resolution of the idealized terrain data are used to evaluate those methods. Among those algorithms the MFD algorithm is the most accurate followed by the BFD algorithm and the SFD algorithm. As the vertical resolution increases, the errors in the computed topographic index for all algorithms decrease. We found that the orientation of the contour lines of planar hillslopes significantly influences the SFD's computed topographic index. If the contour lines are not parallel to one of eight possible flow directions, the errors in the SFD's computed topographic index are significant. If mean slope is small, TFD becomes more accurate because slope values in flat areas are better estimated.
C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
NASA, Goddard Space Flight Ctr, Hydrol Sci Branch, Greenbelt, MD 20071 USA.
RP Pan, FF (reprint author), Oak Ridge Natl Lab, Div Environm Sci, MS 6335, Oak Ridge, TN 37831 USA.
EM panf@ornl.gov
RI Pan, Feifei/D-3370-2015; Peters-Lidard, Christa/E-1429-2012
OI Pan, Feifei/0000-0003-4373-7566; Peters-Lidard,
Christa/0000-0003-1255-2876
NR 23
TC 24
Z9 24
U1 3
U2 12
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 JUN 24
PY 2004
VL 40
IS 6
AR W06303
DI 10.1029/2004WR003069
PG 11
WC Environmental Sciences; Limnology; Water Resources
SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water
Resources
GA 839JA
UT WOS:000222778700005
ER
PT J
AU Zhang, DX
Kang, QJ
AF Zhang, DX
Kang, QJ
TI Pore scale simulation of solute transport in fractured porous media
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID DISPERSION; FLOW; MODEL
AB We investigate the effects of the porosity (and thus permeability) of porous matrix and the fracture aperture on transport in fractured porous media. We do so with detailed lattice Boltzmann simulations on constructed porous media with a single fracture. Both plume spatial moments (the average plume velocity and the dispersion coefficients) and mass transfer coefficients between the facture and the porous matrix are analyzed. It is found that unlike transport in channels or in pure porous media, solute transport in fractured porous media is non-Gaussian with long tails and with time-dependent mean plume velocities and non-Fickian dispersion coefficients. Higher spatial moments may be needed to fully characterize such plumes and the conventional advection-dispersion equation with upscaled coefficients may be inadequate for describing this anomalous dispersive behavior. The long tailing stems from mass transfer between the fracture and the porous matrix and from the contrast in flow velocities of the two media. It is shown that the mass transfer coefficient is proportional to the matrix diffusivity and inversely proportional to the square of the grain size of the porous matrix. Even for low porosity and low permeability porous matrix whose contribution to flow in the fractured porous media can be neglected, mass transfer between the fractures and the matrix is usually non-negligible.
C1 Univ Oklahoma, Mewbourne Sch Petr & Geol Engn, Norman, OK 73019 USA.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Zhang, DX (reprint author), Univ Oklahoma, Mewbourne Sch Petr & Geol Engn, Norman, OK 73019 USA.
EM donzhang@ou.edu
RI Zhang, Dongxiao/D-5289-2009
OI Zhang, Dongxiao/0000-0001-6930-5994
NR 15
TC 20
Z9 20
U1 2
U2 11
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 JUN 23
PY 2004
VL 31
IS 12
AR L12504
DI 10.1029/2004GL019886
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 839HL
UT WOS:000222774500002
ER
PT J
AU Pearce, JV
Diallo, SO
Glyde, HR
Azuah, RT
Arnold, T
Larese, JZ
AF Pearce, JV
Diallo, SO
Glyde, HR
Azuah, RT
Arnold, T
Larese, JZ
TI Enhanced Bose-Einstein condensation and kinetic energy of liquid He-4
near a free surface
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID INELASTIC NEUTRON-SCATTERING; MOMENTUM DISTRIBUTION; SUPERFLUID-HELIUM;
HE-4; FRACTION; FLUCTUATIONS; EXCITATIONS; VYCOR
AB We present neutron scattering measurements of Bose-Einstein condensation (BEC) in liquid He-4 adsorbed in thick layers on an MgO substrate to study whether the condensate fraction, n(0), is increased near a free surface of liquid He-4. The data show that there is definitely a condensate in the layers adsorbed on the substrate with a condensate fraction comparable to that of bulk liquid He-4. Two methods of analysis are employed to cross-check the results. The data indicate that the condensate fraction increases significantly when the number of adsorbed layers is reduced. This effect is independent of the analysis technique used. In addition, a significant increase in the kinetic energy of the He-4 atoms is observed when the number of adsorbed layers is reduced.
C1 Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France.
Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA.
Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA.
NIST, Ctr Neutron Res, Gaithersburg, MD 20988 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
RP Pearce, JV (reprint author), Inst Max Von Laue Paul Langevin, 6 Rue J Horowitz,BP 156, F-38042 Grenoble, France.
EM pearce@ill.fr
RI Diallo, Souleymane/B-3111-2016;
OI Diallo, Souleymane/0000-0002-3369-8391; Arnold,
Thomas/0000-0001-8295-3822
NR 32
TC 9
Z9 9
U1 1
U2 2
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 JUN 23
PY 2004
VL 16
IS 24
BP 4391
EP 4402
DI 10.1088/0953-8984/16/24/020
PG 12
WC Physics, Condensed Matter
SC Physics
GA 839BG
UT WOS:000222757700023
ER
PT J
AU Eitouni, HB
Balsara, NP
AF Eitouni, HB
Balsara, NP
TI Effect of chemical oxidation on the self-assembly of organometallic
block copolymers
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID TRANSITION; POLYMERS; ARRAYS; MELTS
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem Engn, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energies & Technol Div, Berkeley, CA 94720 USA.
RP Balsara, NP (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem Engn, Berkeley, CA 94720 USA.
EM nbalsara@berkeley.edu
NR 16
TC 61
Z9 61
U1 0
U2 18
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 JUN 23
PY 2004
VL 126
IS 24
BP 7446
EP 7447
DI 10.1021/ja048570c
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA 830KM
UT WOS:000222120900017
PM 15198584
ER
PT J
AU Yano, J
Sauer, K
Girerd, JJ
Yachandra, VK
AF Yano, J
Sauer, K
Girerd, JJ
Yachandra, VK
TI Single crystal X- and Q-band EPR spectroscopy of a binuclear Mn2(III,IV)
complex relevant to the oxygen-evolving complex of photosystem II
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID ELECTRON-PARAMAGNETIC-RESONANCE; MAGNETIC EXCHANGE INTERACTIONS;
MN(III)MN(IV) MODEL COMPLEXES; HIGH-FREQUENCY EPR; MN CLUSTER; S-0
STATE; THERMUS-THERMOPHILUS; DIMANGANESE CATALASE; MULTILINE SIGNAL;
MANGANESE CENTER
AB The anisotropic g and hyperfine tensors of the Mn di-mu-oxo complex, [Mn-2(III,IV)O-2(phen)(4)](PF6)(3)(CH3CN)-C-., were derived by single-crystal EPR measurements at X- and Q-band frequencies. This is the first simulation of EPR parameters from single-crystal EPR spectra for multinuclear Mn complexes, which are of importance in several metalloenzymes; one of them is the oxygen-evolving complex in photosystem II (PS II). Single-crystal [Mn-2(III,IV)O-2(phen)(4)](PF6)(3)(CH3CN)-C-. EPR spectra showed distinct resolved Mn-55 hyperfine lines in all crystal orientations, unlike single-crystal EPR spectra of other Mn-2(III,IV) di-mu-oxo bridged complexes. We measured the EPR spectra in the crystal ab- and bc-planes, and from these spectra we obtained the EPR spectra of the complex along the unique a-, b-, and c-axes of the crystal. The crystal orientation was determined by X-ray diffraction and single-crystai EXAFS (Extended X-ray Absorption Fine Structure) measurements. In this complex, the three crystallographic axes, a, b, and c, are parallel or nearly parallel to the principal molecular axes of Mn-2(III,IV)O-2(phen)(4) as shown in the crystallographic data by Stebler et al. (Inorg. Chem. 1986, 25, 4743). This direct relation together with the resolved hyperfine lines significantly simplified the simulation of single-crystal spectra in the three principal directions due to the reduction of free parameters and, thus, allowed us to define the magnetic g and A tensors of the molecule with a high degree of reliability. These parameters were subsequently used to generate the solution EPR spectra at both X- and Q-bands with excellent agreement. The anisotropic g and hyperfine tensors determined by the simulation of the X- and Q-band single-crystal and solution EPR spectra are as follows: g(x) = 1.9887, g(y) = 1.9957, g(z) = 1.9775, and hyperfine coupling constants are A(x)(III) = \171\ G, A(y)(III) = \176\ G, A(z)(III) = \129\ G, A(x)(IV) = \77\ G, A(y)(IV) = \74\ G, A(z)(IV) = \80\ G.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Melvin Calvin Lab, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
Univ Paris 11, Inst Chim Mol Orsay, UMR 8613, Chim Inorgan Lab, F-91405 Orsay, France.
RP Yano, J (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Melvin Calvin Lab, Berkeley, CA 94720 USA.
EM jyano@lbl.gov; vkyachandra@lbl.gov
FU NIGMS NIH HHS [GM55302, R01 GM055302, R56 GM055302]
NR 56
TC 12
Z9 12
U1 1
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 JUN 23
PY 2004
VL 126
IS 24
BP 7486
EP 7495
DI 10.1021/ja038218j
PG 10
WC Chemistry, Multidisciplinary
SC Chemistry
GA 830KM
UT WOS:000222120900028
PM 15198595
ER
PT J
AU Yang, M
Somorjai, GA
AF Yang, M
Somorjai, GA
TI Adsorption and reactions of C-6 hydrocarbons at high pressures on
Pt(111) single-crystal surfaces studied by sum frequency generation
vibrational spectroscopy: Mechanisms of isomerization and
dehydrocyclization of n-hexane
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID CATALYTIC-REACTIONS; METAL-SURFACES; IN-SITU; ETHYLENE HYDROGENATION;
STRUCTURE SENSITIVITY; THERMAL-DESORPTION; ALKANES; DEHYDROGENATION;
CYCLOHEXANE; MOLECULES
AB The adsorption geometries and surface reactions of various C-6 hydrocarbons (n-hexane, 2-methylpentane, 3-methylpentane, and 1-hexene) adsorbed on Pt(111) were investigated using sum frequency generation (SFG) surface vibrational spectroscopy. The adsorptions and reactions were carried out in 1.5 Torr of C-6 hydrocarbons in the absence and presence of excess hydrogen (15 Torr) and in the temperature range 296-453 K. At 296 K and in the presence of excess hydrogen, n-hexane and 3-methylpentane adsorbed molecularly on Pt(111) mostly in "flat-lying" geometries. Upon heating the sample up to 453 K, the molecules underwent dehydrogenation to form new surface species in "standing-up" geometries, such as hexylidyne and metallacyclic species. However, 2-methylpentane and 1-hexene were dehydrogenated to metallacyclobutane and hexylidyne, respectively, at 296 K in the presence of excess hydrogen. The dehydrogenated species remained unreacted on the surface upon heating the sample up to 453 K. The absence of excess hydrogen enhanced dehydrogenation of n-hexane and 3-methylpentane to form pi-allyl c-C6H9 and metallacyclohexane, respectively, at 296 K. Upon heating to 453 K, the pi-allyl c-C6H9 species underwent irreversible dehydrogenation, while hexylidyne and metallacyclic species remained unreacted. On the basis of these results, the mechanisms for catalytic isomerization and dehydrocyclization of n-hexane, which are the important "reforming" reactions to produce high-octane fuels over platinum, were discussed.
C1 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
NR 65
TC 43
Z9 43
U1 3
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 JUN 23
PY 2004
VL 126
IS 24
BP 7698
EP 7708
DI 10.1021/ja0361446
PG 11
WC Chemistry, Multidisciplinary
SC Chemistry
GA 830KM
UT WOS:000222120900051
PM 15198618
ER
PT J
AU Roberts, AG
Bowman, MK
Kramer, DM
AF Roberts, AG
Bowman, MK
Kramer, DM
TI The inhibitor DBMIB provides insight into the functional architecture of
the qo site in the cytochrome b(6)f complex
SO BIOCHEMISTRY
LA English
DT Article
ID IRON-SULFUR PROTEIN; BOVINE HEART-MITOCHONDRIA; PROTONMOTIVE Q-CYCLE;
PHOTOSYNTHETIC ELECTRON-TRANSPORT; UBIQUINONE BINDING-CAPACITY; BC(1)
COMPLEX; Q(O) SITE; DOMAIN MOVEMENT; ENERGY-CONVERSION; 2FE-2S CLUSTER
AB Previously [Roberts, A. G., and Kramer, D. M. (2001) Biochemistry 40, 13407-13412], we showed that 2 equiv of the quinone analogue 2,5-dibromo-3-methyl-6-isopropylbenzoquinone (DBMIB) could occupy the Q(o) site of the cytochrome (cyt) b(6)f complex simultaneously. In this work, a study of electron paramagnetic resonance (EPR) spectra from the oriented cyt b(6)f complex shows that the Rieske iron-sulfur protein (ISP) is in distinct orientations, depending on the stoichiometry of the inhibitor at the Q(o) site. With a single DBMIB at the Q(o) site, the ISP is oriented with the 2Fe-2S cluster toward cyt f, which is similar to the orientation of the ISP in the X-ray crystal structure of the cyt b(6)f complex from thermophilic cyanobacterium Mastigocladus laminosus in the presence of DBMIB, as well as that of the chicken mitochondrial cyt bc(1) complex in the presence of the class II inhibitor myxothiazol, which binds in the so-called "proximal niche", near the cyt b(L) heme. These data suggest that the high-affinity DBMIB site is at the proximal niche Q(o) pocket. With 2 equiv of DBMIB bound, the Rieske ISP is in a position that resembles the ISPB position of the chicken mitochondrial cyt bc(1) complex in the presence of stigmatellin and the Chlamydomonas reinhardtii cyt b(6)f complex in the presence of tridecylstigmatellin (TDS), which suggests that the low-affinity DBMIB site is at the distal niche. The close interaction of DBMIB bound at the distal niche with the ISP induced the well-known effects on the 2Fe-2S EPR spectrum and redox potential. To further test the effects of DBMIB on the ISP, the extents of cyt f oxidation after flash excitation in the presence of photosystem II inhibitor DCMU were measured as a function of DBMIB concentration in thylakoids. Addition of DBMIB concentrations at which a single binding was expected did not markedly affect the extent of cyt f oxidation, whereas higher concentrations, at which double occupancy was expected, increased the extent of cyt f oxidation to levels similar to that of cyt f oxidation in the presence of a saturating concentration of stigmatellin. Simulations of the EPR g-tensor orientations of the 2Fe-2S cluster versus the physical orientations based on single-crystal studies of the cyt bc(1) complex suggest that the soluble ISP domain of the spinach cyt b(6)f complex can rotate by at least 53degrees, which is consistent with long-range ISP domain movement. Implications of these results are discussed in the context of the X-ray crystal structures of the chicken mitochondrial cyt bc(1) complex and the M. laminosus and C. reinhardtii cyt b(6)f complexes.
C1 Washington State Univ, Inst Biol Chem, Pullman, WA 99164 USA.
Battelle NW Labs, Richland, WA 99352 USA.
Univ Washington, Dept Med Chem, Seattle, WA 98195 USA.
RP Kramer, DM (reprint author), Washington State Univ, Inst Biol Chem, 289 Clark Hall, Pullman, WA 99164 USA.
EM dkramer@wsu.edu
RI Bowman, Michael/F-4265-2011
OI Bowman, Michael/0000-0003-3464-9409
FU NIGMS NIH HHS [GM61904]
NR 98
TC 24
Z9 24
U1 0
U2 10
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0006-2960
J9 BIOCHEMISTRY-US
JI Biochemistry
PD JUN 22
PY 2004
VL 43
IS 24
BP 7707
EP 7716
DI 10.1021/bi049521f
PG 10
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 829QE
UT WOS:000222063900007
PM 15196013
ER
PT J
AU Luo, SN
Strachan, A
Swift, DC
AF Luo, SN
Strachan, A
Swift, DC
TI Nonequilibrium melting and crystallization of a model Lennard-Jones
system
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID MOLECULAR-DYNAMICS; CRYSTAL NUCLEATION; FREE-ENERGIES; SIMULATIONS;
TRANSITIONS; COEXISTENCE; INTERFACE; LINDEMANN; LIMIT; WATER
AB Nonequilibrium melting and crystallization of a model Lennard-Jones system were investigated with molecular dynamics simulations to quantify the maximum superheating/supercooling at fixed pressure, and over-pressurization/over-depressurization at fixed temperature. The temperature and pressure hystereses were found to be equivalent with regard to the Gibbs free energy barrier for nucleation of liquid or solid. These results place upper bounds on hysteretic effects of solidification and melting in high heating- and strain-rate experiments such as shock wave loading and release. The authors also demonstrate that the equilibrium melting temperature at a given pressure can be obtained directly from temperatures at the maximum superheating and supercooling on the temperature hysteresis; this approach, called the hysteresis method, is a conceptually simple and computationally inexpensive alternative to solid-liquid coexistence simulation and thermodynamic integration methods, and should be regarded as a general method. We also found that the extent of maximum superheating/supercooling is weakly pressure dependent, and the solid-liquid interfacial energy increases with pressure. The Lindemann fractional root-mean-squared displacement of solid and liquid at equilibrium and extreme metastable states is quantified, and is predicted to remain constant (0.14) at high pressures for solid at the equilibrium melting temperature. (C) 2004 American Institute of Physics.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Luo, SN (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA.
EM sluo@lanl.gov
RI Luo, Sheng-Nian /D-2257-2010
OI Luo, Sheng-Nian /0000-0002-7538-0541
NR 47
TC 96
Z9 96
U1 4
U2 32
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUN 22
PY 2004
VL 120
IS 24
BP 11640
EP 11649
DI 10.1063/1.1755655
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 827NS
UT WOS:000221907800036
PM 15268198
ER
PT J
AU Crowell, RA
Lian, R
Shkrob, IA
Bartels, DM
Chen, XY
Bradforth, SE
AF Crowell, RA
Lian, R
Shkrob, IA
Bartels, DM
Chen, XY
Bradforth, SE
TI Ultrafast dynamics for electron photodetachment from aqueous hydroxide
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Review
ID VERTICAL IONIZATION-POTENTIALS; QUANTUM MOLECULAR-DYNAMICS; TO-SOLVENT
SPECTRA; LIQUID WATER; HYDRATED ELECTRON; PULSE-RADIOLYSIS; SOLVATED
ELECTRONS; COMPUTER-SIMULATION; RELAXATION DYNAMICS; THRESHOLD
PHOTODETACHMENT
AB Charge-transfer-to-solvent reactions of hydroxide induced by 200 nm monophotonic or 337 and 389 nm biphotonic excitation of this anion in aqueous solution have been studied by means of pump probe ultrafast laser spectroscopy. Transient absorption kinetics of the hydrated electron, e(aq)(-), have been observed, from a few hundred femtoseconds out to 600 ps, and studied as function of hydroxide concentration and temperature. The geminate decay kinetics are bimodal, with a fast exponential component (similar to13 ps) and a slower power "tail" due to the diffusional escape of the electrons. For the biphotonic excitation, the extrapolated fraction of escaped electrons is 1.8 times higher than for the monophotonic 200 nm excitation (31% versus 17.5% at 25degreesC, respectively), due to the broadening of the electron distribution. The biphotonic electron detachment is very inefficient; the corresponding absorption coefficient at 400 nm is <4 cm TW-1 M-1 (assuming unity quantum efficiency for the photodetachment). For [OH-] between 10 mM and 10 M, almost no concentration dependence of the time profiles of solvated electron kinetics was observed. At higher temperature, the escape fraction of the electrons increases with a slope of 3 x 10(-3) K-1 and the recombination and diffusion-controlled dissociation of the close pairs become faster. Activation energies of 8.3 and 22.3 kJ/mol for these two processes were obtained. The semianalytical theory of Shushin for diffusion controlled reactions in the central force field was used to model the geminate dynamics. The implications of these results for photoionization of water are discussed. (C) 2004 American Institute of Physics.
C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA.
RP Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM rob_crowell@anl.gov; bartels@hertz.rad.nd.edu
RI Bradforth, Stephen/B-5186-2008
OI Bradforth, Stephen/0000-0002-6164-3347
NR 108
TC 50
Z9 50
U1 3
U2 22
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 JUN 22
PY 2004
VL 120
IS 24
BP 11712
EP 11725
DI 10.1063/1.1739213
PG 14
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 827NS
UT WOS:000221907800045
PM 15268207
ER
PT J
AU Gilbert, B
Zhang, HZ
Huang, F
Banfield, JF
Ren, Y
Haskel, D
Lang, JC
Srajer, G
Jurgensen, A
Waychunas, GA
AF Gilbert, B
Zhang, HZ
Huang, F
Banfield, JF
Ren, Y
Haskel, D
Lang, JC
Srajer, G
Jurgensen, A
Waychunas, GA
TI Analysis and simulation of the structure of nanoparticles that undergo a
surface-driven structural transformation
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID MOLECULAR-DYNAMICS SIMULATION; ABSORPTION FINE-STRUCTURE; PAIR
DISTRIBUTION-FUNCTIONS; NEAR-EDGE STRUCTURE; PHASE-STABILITY;
THERMODYNAMIC ANALYSIS; MULTIPLE-SCATTERING; CDSE NANOCRYSTALS;
ZINC-SULFIDE; EXAFS
AB A room temperature solid-state structural transformation was observed in 3 nm ZnS nanoparticles in methanol following the addition of water (Zhang et al., Nature 424, 1025, 2003). Experimental wide angle x- ray scattering (WAXS), x-ray absorption near edge structure (XANES) and extended x- ray absorption fine structure (EXAFS) spectroscopy measurements show a large increase in crystallinity associated with water addition, in agreement with molecular dynamics (MD) predictions. Here we perform first-shell EXAFS and pair distribution function analysis and whole-nanoparticle calculations of WAXS, EXAFS and XANES to compare structural data with the MD predictions. The predicted WAXS patterns give excellent agreement with data, while the predicted EXAFS and XANES spectra give poor agreement. Relative to WAXS, XANES and EXAFS spectra contain additional structural information related to the distribution of disorder. The discrepancy between the x- ray diffraction and x- ray absorption results indicates that structural disorder is partitioned between interior and surface regions more strongly than predicted in the MD simulations. (C) 2004 American Institute of Physics.
C1 Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
Univ Wisconsin, Ctr Synchrotron Radiat, Canadian Synchrotron Radiat Facil, Stoughton, WI 53589 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
EM bgilbert@eps.berkeley.edu
RI Gilbert, Benjamin/E-3182-2010
NR 53
TC 30
Z9 31
U1 1
U2 32
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 JUN 22
PY 2004
VL 120
IS 24
BP 11785
EP 11795
DI 10.1063/1.1752890
PG 11
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 827NS
UT WOS:000221907800051
PM 15268213
ER
PT J
AU Tikhonov, AM
Pingali, SV
Schlossman, ML
AF Tikhonov, AM
Pingali, SV
Schlossman, ML
TI Molecular ordering and phase transitions in alkanol monolayers at the
water-hexane interface
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID X-RAY REFLECTIVITY; SUM-FREQUENCY SPECTROSCOPY; LANGMUIR MONOLAYERS;
AIR/WATER INTERFACE; NEUTRON-SCATTERING; CHAIN MOLECULES; VIBRATIONAL
SPECTROSCOPY; PHOSPHOLIPID MONOLAYERS; 1-ALCOHOL MONOLAYERS; 2D
CRYSTALLIZATION
AB The interface between bulk water and bulk hexane solutions of n-alkanols (H(CH(2))(m)OH, where m=20, 22, 24, or 30) is studied with x-ray reflectivity, x-ray off-specular diffuse scattering, and interfacial tension measurements. The alkanols adsorb to the interface to form a monolayer. The highest density, lowest temperature monolayers contain alkanol molecules with progressive disordering of the chain from the -CH(2)OH to the -CH(3) group. In the terminal half of the chain that includes the -CH(3) group the chain density is similar to that observed in bulk liquid alkanes just above their freezing temperature. The density in the alkanol headgroup region is 10% greater than either bulk water or the ordered headgroup region found in alkanol monolayers at the water-vapor interface. We conjecture that this higher density is a result of water penetration into the headgroup region of the disordered monolayer. A ratio of 1: 3 water to alkanol molecules is consistent with our data. We also place an upper limit of one hexane to five or six alkanol molecules mixed into the alkyl chain region of the monolayer. In contrast, H(CH(2))(30)OH at the water-vapor interface forms a close-packed, ordered phase of nearly rigid rods. Interfacial tension measurements as a function of temperature reveal a phase transition at the water-hexane interface with a significant change in interfacial excess entropy. This transition is between a low temperature interface that is nearly fully covered with alkanols to a higher temperature interface with a much lower density of alkanols. The transition for the shorter alkanols appears to be first order whereas the transition for the longer alkanols appears to be weakly first order or second order. The x-ray data are consistent with the presence of monolayer domains at the interface and determine the domain coverage (fraction of interface covered by alkanol domains) as a function of temperature. This temperature dependence is consistent with a theoretical model for a second order phase transition that accounts for the domain stabilization as a balance between line tension and long range dipole forces. Several aspects of our measurements indicate that the presence of domains represents the appearance of a spatially inhomogeneous phase rather than the coexistence of two homogeneous phases. (C) 2004 American Institute of Physics.
C1 Univ Chicago, Ctr Adv Radiat Sources, Chicago, IL 60637 USA.
Brookhaven Natl Lab, Natl Synchrotron Light Source, Beamline X19C, Upton, NY 11973 USA.
Univ Illinois, Dept Phys, Chicago, IL 60607 USA.
Univ Illinois, Dept Chem, Chicago, IL 60607 USA.
RP Tikhonov, AM (reprint author), Univ Chicago, Ctr Adv Radiat Sources, Chicago, IL 60637 USA.
EM tikhonov@bnl.gov; schloss@uic.edu
RI Tikhonov, Aleksey/N-1111-2016;
OI Pingali, Sai Venkatesh/0000-0001-7961-4176
NR 90
TC 36
Z9 36
U1 1
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 JUN 22
PY 2004
VL 120
IS 24
BP 11822
EP 11838
DI 10.1063/1.1752888
PG 17
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 827NS
UT WOS:000221907800055
PM 15268217
ER
PT J
AU Maurice, S
Lawrence, DJ
Feldman, WC
Elphic, RC
Gasnault, O
AF Maurice, S
Lawrence, DJ
Feldman, WC
Elphic, RC
Gasnault, O
TI Reduction of neutron data from lunar prospector
SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
LA English
DT Article
DE gamma ray; Lunar Prospector; Moon
ID EPITHERMAL NEUTRONS; GAMMA-RAY; SURFACE; SPECTROMETERS; ABUNDANCES;
SPECTRA; TIO2; MOON; FLUX
AB From January 1998 to July 1999, Lunar Prospector continuously measured the leakage flux of neutrons from the Moon in four distinct energy ranges from 0 eV to 8 MeV. These measurements were made using two 3 He tubes within the Neutron Spectrometer (NS) and the anticoincidence shield of the Gamma-Ray Spectrometer (GRS). This publication details the reduction of raw neutron data ( level 0) to develop four maps of neutron counting rates, which can be interpreted in terms of elemental composition of the lunar regolith. Details are given to convert level 0 data into level 1 data, where corrupted and unusable records have been removed because of transmission errors, solar energetic-particle events, or cross-talk with other instruments. At level 2, time series data have been corrected for observational biases and variations of the response function of the instruments. At level 3 the highest-quality neutron data (low-altitude, high time resolution) are mapped onto the Moon. The main characteristics of each map are, for thermal neutrons, energy range 0-0.4 eV, dynamic range 95%, precision 2.7%, and half width at half maximum (HWHM) resolution 23 km, in units of counts/8-s; for epithermal neutrons, energy range 0.4 eV < E < 0.7 MeV, dynamic range 15%, precision 1%, and HWHM resolution 22 km, in units of counts/8-s; for moderated neutrons, energy range 0-0.8 MeV, dynamic range 15%, precision 1.8%, and HWHM resolution < 45 km, in units of counts/32-s; and for fast neutrons, energy range 0.8-8 MeV, dynamic range 30%, precision 1.6%, and HWHM resolution 23 km, in units of counts/32-s. All maps are normalized to 30 km altitude, at the equator; and to the flux of cosmic rays in January 1998. They are presented as 720 x 360 arrays equally spaced in latitude and longitude. Results are reproducible from raw data that are available at the Planetary Data System (PDS), together with guidance and numerical values in this publication.
C1 Observ Midi Pyrenees, Ctr Etud Spatiale Rayonnements, F-31400 Toulouse, France.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Maurice, S (reprint author), Observ Midi Pyrenees, Ctr Etud Spatiale Rayonnements, 9 Ave Colonel Roche, F-31400 Toulouse, France.
EM sylvestre.maurice@cesr.fr
RI Gasnault, Olivier/F-4327-2010; Lawrence, David/E-7463-2015
OI Gasnault, Olivier/0000-0002-6979-9012; Lawrence,
David/0000-0002-7696-6667
NR 36
TC 45
Z9 45
U1 0
U2 8
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9097
EI 2169-9100
J9 J GEOPHYS RES-PLANET
JI J. Geophys. Res.-Planets
PD JUN 22
PY 2004
VL 109
IS E7
AR E07S04
DI 10.1029/2003JE002208
PG 40
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 839IQ
UT WOS:000222777700001
ER
PT J
AU Crooker, NU
Forsyth, R
Rees, A
Gosling, JT
Kahler, SW
AF Crooker, NU
Forsyth, R
Rees, A
Gosling, JT
Kahler, SW
TI Counterstreaming electrons in magnetic clouds near 5 AU
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE coronal mass ejections; heliospheric magnetic flux budget
ID CORONAL MASS EJECTIONS; HIGH HELIOGRAPHIC LATITUDES; SOLAR-WIND;
GEOMAGNETIC-ACTIVITY; FIELD LINES; FLUX; EVOLUTION; TOPOLOGY; EVENTS;
DISTURBANCES
AB Suprathermal electron pitch angle spectrograms were searched for counterstreaming signatures in 31 magnetic clouds identified in Ulysses data when the spacecraft was located similar to5 AU from the Sun. Under the assumption that counterstreaming indicates closed field lines, that is, field lines attached to the Sun at both ends, we find that the clouds range from 0 to 100% closed, with an average of 55% closed, and that the percentage of closed flux tends to increase with increasing cloud size. The results are similar to those found at 1 AU, implying that the rate at which a cloud opens, presumably by interchange reconnection back at the Sun, slows significantly as its leading edge moves further out into the heliosphere.
C1 Boston Univ, Ctr Space Phys, Boston, MA 02215 USA.
Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
USAF, Res Lab, Hanscom AFB, MA 01731 USA.
RP Crooker, NU (reprint author), Boston Univ, Ctr Space Phys, Boston, MA 02215 USA.
EM crooker@bu.edu; r.forsyth@ic.ac.uk; adam.rees@ic.ac.uk;
jgosling@lanl.gov; stephen.kahler@hanscom.af.mil
NR 36
TC 29
Z9 29
U1 0
U2 0
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 JUN 22
PY 2004
VL 109
IS A6
AR A06110
DI 10.1029/2004JA010426
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 839IT
UT WOS:000222778000006
ER
PT J
AU Kraack, H
Ocko, BM
Pershan, PS
Sloutskin, E
Tamam, L
Deutsch, M
AF Kraack, H
Ocko, BM
Pershan, PS
Sloutskin, E
Tamam, L
Deutsch, M
TI Fatty acid Langmuir films on liquid mercury: X-ray and surface tension
studies
SO LANGMUIR
LA English
DT Article
ID AIR-WATER-INTERFACE; BREWSTER-ANGLE MICROSCOPY; NORMAL-ALKANES;
PHASE-TRANSITIONS; MONOLAYER PHASES; DENSITY PROFILE; VAPOR INTERFACE;
DIFFRACTION; SCATTERING; ARCHITECTURES
AB The structure and phase behavior of liquid-mercury-supported molecular films of fatty acids (CH3(CH2)(n-2)COOH, denoted CnOOH) were studied for molecular lengths 7 less than or equal to n less than or equal to 24, by surface tensiometry and X-ray methods. Two qualitatively different film structures were found, depending on coverage. For high coverage, the film consists of a monolayer of roughly surface-normal molecules, showing a pressure-dependent sequence of structures similar, though not identical, to that of the corresponding water-supported Langmuir films. At low coverage, phases consisting of surface-parallel molecules are found, not observed on the aqueous subphases employed to date. In this range, a two-dimensional (2D) gas followed by a single and, for 14 less than or equal to n less than or equal to 24, also by a double layer of surface-parallel molecules is found as coverage is increased. Depending on chain length, the flat-lying phases have a crystalline 2D-ordered, a smectic-like 1D-ordered, or a disordered in-plane structure consisting of molecular dimers. The structure and thermodynamics of the films are discussed.
C1 Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel.
Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
RP Deutsch, M (reprint author), Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel.
EM deutsch@mail.biu.ac.il
NR 64
TC 26
Z9 27
U1 3
U2 7
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD JUN 22
PY 2004
VL 20
IS 13
BP 5375
EP 5385
DI 10.1021/la049977y
PG 11
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 831DZ
UT WOS:000222174800036
PM 15986676
ER
PT J
AU Kraack, H
Ocko, BM
Pershan, PS
Sloutskin, E
Tamam, L
Deutsch, M
AF Kraack, H
Ocko, BM
Pershan, PS
Sloutskin, E
Tamam, L
Deutsch, M
TI The structure and phase diagram of Langmuir films of alcohols on mercury
SO LANGMUIR
LA English
DT Article
ID X-RAY-DIFFRACTION; LIQUID-VAPOR INTERFACE; DENSITY PROFILE; MONOLAYERS;
SURFACE; WATER; ARCHITECTURES; REFLECTIVITY; MIXTURES; ALKANES
AB The coverage-dependent phase behavior of molecular films of alcohols (CH3(CH2)(n-2)CH2OH, denoted as CnOH) on mercury was studied for chain lengths 8 less than or equal to n less than or equal to 28, using surface tensiometry and surface specific X-ray methods. Phases with surface-normal-oriented molecules are found at high coverage, showing the CS, S, and LS phases found also on water. Phases comprising surface parallel molecules, which do not exist on water, are found here at low coverage. For the lowest coverage a two-dimensional gas phase is found, followed, upon increasing the coverage, by an n-dependent sequence of condensed phases of up to four layers of surface-parallel molecules before converting to the surface-normal phases. In contrast with the surface-normal phases, all of the surface-parallel phases are found to lack long-range order in the surface-parallel direction. Adsorption energies are derived from the phase diagram for the alkyl chain and the alcohol headgroup.
C1 Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel.
Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
RP Deutsch, M (reprint author), Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel.
EM deutsch@mail.biu.ac.il
NR 39
TC 26
Z9 27
U1 0
U2 4
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD JUN 22
PY 2004
VL 20
IS 13
BP 5386
EP 5395
DI 10.1021/la0497954
PG 10
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 831DZ
UT WOS:000222174800037
PM 15986677
ER
PT J
AU Bunker, CE
Harruff, BA
Pathak, P
Payzant, A
Allard, LF
Sun, YP
AF Bunker, CE
Harruff, BA
Pathak, P
Payzant, A
Allard, LF
Sun, YP
TI Formation of cadmium sulfide nanoparticles in reverse micelles: Extreme
sensitivity to preparation procedure
SO LANGMUIR
LA English
DT Article
ID NANOSIZED PARTICLES; CDS NANOCLUSTERS; SOLID-SOLUTION; CRYSTALLITES;
ENERGY; INSITU
C1 USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA.
Clemson Univ, Dept Chem, Howard L Humter Chem Lab, Clemson, SC 29634 USA.
Oak Ridge Natl Lab, High Temp Mat Lab, Oak Ridge, TN 37831 USA.
RP Bunker, CE (reprint author), USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA.
RI Payzant, Edward/B-5449-2009
OI Payzant, Edward/0000-0002-3447-2060
NR 20
TC 26
Z9 28
U1 1
U2 5
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD JUN 22
PY 2004
VL 20
IS 13
BP 5642
EP 5644
DI 10.1021/la049607
PG 3
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 831DZ
UT WOS:000222174800073
PM 15986713
ER
PT J
AU Gnanakaran, S
Hochstrasser, RM
Garcia, AE
AF Gnanakaran, S
Hochstrasser, RM
Garcia, AE
TI Nature of structural inhomogeneities on folding a helix and their
influence on spectral measurements
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
ID EXCHANGE MOLECULAR-DYNAMICS; ALANINE-BASED PEPTIDES;
INFRARED-SPECTROSCOPY; ALPHA-HELIX; VIBRATIONAL SPECTROSCOPY;
FTIR-SPECTROSCOPY; N-METHYLACETAMIDE; COIL TRANSITION; FORCE-FIELD; FAST
EVENTS
AB Extensive conformational sampling and calculations of vibrational coupling provide a quantitative basis for the structurally inhomogeneous spectra of the amide unit in aqueous solutions containing folded and unfolded state distributions of helices. Replica exchange molecular dynamics simulations of the capped helical peptide, AA(AAKAA)(3)AAY, is carried out over a range of temperatures, where the system populates the folded and unfolded states. This sampling defines a set of ensembles that characterizes the conformational variability for configurations identified by their fraction of helical content. The effects of hydrogen bonding, both internal and external (with water), and the coupling between amide-I modes are computed as a function of temperature and helical content. End-to-end distance and coupling distributions are also computed. The solvent H-bonding, which is present at all temperatures, shifts the amide-I band toward lower frequency compared with the unsolvated band. Upon thermal denaturation of the peptide, the amide-I band shifts to higher frequency because the increase in solvent H-bonding fails to compensate for the loss in internal (helical) H-bonds. The loss of uniformity of the mode coupling along the helix at higher temperatures accounts for the well-known thermal broadening of the amide IR spectrum. The calculated inhomogeneities of segments of the peptide predict experimental properties of isotope-edited helices.
C1 Univ Penn, Dept Chem, Philadelphia, PA 19104 USA.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Hochstrasser, RM (reprint author), Univ Penn, Dept Chem, Philadelphia, PA 19104 USA.
EM hochstra@sas.upenn.edu
FU NCRR NIH HHS [P41 RR001348, RR01348]; NIGMS NIH HHS [GM12592, R01
GM012592, R37 GM012592]
NR 48
TC 54
Z9 54
U1 0
U2 8
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 JUN 22
PY 2004
VL 101
IS 25
BP 9229
EP 9234
DI 10.1073/pnas.0402933101
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 832PE
UT WOS:000222278600013
PM 15197256
ER
PT J
AU Yan, Q
Gambino, RJ
Sampath, S
Lewis, LH
Li, L
Baumberger, E
Vaidya, A
Xiong, H
AF Yan, Q
Gambino, RJ
Sampath, S
Lewis, LH
Li, L
Baumberger, E
Vaidya, A
Xiong, H
TI Effects of zinc loss on the magnetic properties of plasma-sprayed MnZn
ferrites
SO ACTA MATERIALIA
LA English
DT Article
DE MnZn ferrite; plasma spray; splat
ID MICROSTRUCTURE DEVELOPMENT; MOLYBDENUM PARTICLES; SPLAT FORMATION;
DEPOSITION; FILMS; OXIDATION
AB Energy dispersive X-ray analysis performed on plasma-sprayed MnZn ferrite (MZF) single 'splats' shows a variation in zinc content within splats of different sizes after the spray process, even though the powder has the same starting stoichiometry. A simple model indicates that smaller particles have a higher zinc evaporation rate during the in-flight time. However, the significant decrease of zinc in smaller ferrite particles is mainly attributed to their large surface-to-volume ratio. Compositional differences due to a random cation distribution condition results in magnetic property variations among MZF splats. The coating inhomogeneity due to zinc loss increases the coercivity of the plasma-sprayed MnZn ferrites. The magnetic properties of the MnZn ferrites can be improved through long-range (diffusion) and short-range (ordering) cation redistribution upon low temperature annealing. (C) 2004 Acta Materialia, Inc. Published by Elsevier Ltd. All rights reserved.
C1 SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA.
SUNY Stony Brook, Dept Mech Engn, Stony Brook, NY 11794 USA.
Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA.
RP Yan, Q (reprint author), SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA.
EM qiyan@ic.sunysb.edu
RI Yan , Qingyu/A-2237-2011
NR 25
TC 30
Z9 36
U1 0
U2 5
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
J9 ACTA MATER
JI Acta Mater.
PD JUN 21
PY 2004
VL 52
IS 11
BP 3347
EP 3353
DI 10.1016/j.actamat.2004.03.032
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 830LF
UT WOS:000222122900016
ER
PT J
AU Ellis, AR
Majumdar, A
Choi, KK
Reno, JL
Tsui, DC
AF Ellis, AR
Majumdar, A
Choi, KK
Reno, JL
Tsui, DC
TI Binary superlattice quantum-well infrared photodetectors for
long-wavelength broadband detection
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID BARRIER; LIGHT
AB We have adopted a binary superlattice structure for long-wavelength broadband detection. In this superlattice, the basis contains two unequal wells, with which more energy states are created for broadband absorption. At the same time, responsivity is more uniform within the detection band because of mixing of wave functions from the two wells. This uniform line shape is particularly suitable for spectroscopy applications. The detector is designed to cover the entire 8-14 mum long-wavelength atmospheric window. The observed spectral widths are 5.2 and 5.6 mum for two nominally identical wafers. The photoresponse spectra from both wafers are nearly unchanged over a wide range of operating bias and temperature. The background-limited temperature is 50 K at 2 V bias for F/1.2 optics. (C) 2004 American Institute of Physics.
C1 Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA.
USA, Res Lab, Adelphi, MD 20783 USA.
Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Majumdar, A (reprint author), Intel Corp, Components Res, 5200 NE Elam Young Pkwy, Hillsboro, OR 97124 USA.
EM amlan.majumdar@intel.com
RI Choi, Kwong-Kit/K-9205-2013
NR 14
TC 11
Z9 11
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUN 21
PY 2004
VL 84
IS 25
BP 5127
EP 5129
DI 10.1063/1.1764932
PG 3
WC Physics, Applied
SC Physics
GA 830HD
UT WOS:000222111800020
ER
PT J
AU Hoagland, RG
Hirth, JP
Misra, A
Mitlin, D
AF Hoagland, RG
Hirth, JP
Misra, A
Mitlin, D
TI Influence of surface steps on glide of threading dislocations during
layer growth
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID MULTILAYER STRUCTURES; MISFIT DISLOCATION; HETEROSTRUCTURES; THICKNESS
AB We discuss the relaxation of coherency stresses by glide of threading dislocations in a layer that is growing coherently on a substrate. Glide of threading dislocations becomes energetically favorable when the thickness of the layer exceeds a critical value, h(c). Predicted values of h(c) are often less than indicated by experimental observations. We show that the energy associated with the creation or removal of steps on the surface of a growing layer is important in determining the h(c) associated with glide of threading dislocations. (C) 2004 American Institute of Physics.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Hoagland, RG (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM hoagland@lanl.gov
RI Hoagland, Richard/G-9821-2012; Misra, Amit/H-1087-2012; Mitlin , David
/M-5328-2016
OI Mitlin , David /0000-0002-7556-3575
NR 14
TC 12
Z9 12
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
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUN 21
PY 2004
VL 84
IS 25
BP 5136
EP 5138
DI 10.1063/1.1765199
PG 3
WC Physics, Applied
SC Physics
GA 830HD
UT WOS:000222111800023
ER
PT J
AU Siegal, MP
Overmyer, DL
Kaatz, FH
AF Siegal, MP
Overmyer, DL
Kaatz, FH
TI Controlling the site density of multiwall carbon nanotubes via growth
conditions
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID CHEMICAL-VAPOR-DEPOSITION; FIELD-EMISSION; ARRAYS; DISPLAY; FILMS
AB We present two complementary methods for controlling the site density of multiwall carbon nanotubes (CNTs) directly as a function of growth conditions from 10(11) to 10(7) CNTs/cm(2). Several potential applications require significant spacing between individual CNTs. The first method shows that the site density varies with the heat of formation of the hydrocarbon gas used during CNT growth by thermal chemical vapor deposition. The second method demonstrates that the site density decreases with increasing residual stress of the metal catalyst/diffusion barrier layers. These methods are combined for wide-range control of CNT site density. (C) 2004 American Institute of Physics.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Siegal, MP (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM mpsiega@sandia.gov
NR 21
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 JUN 21
PY 2004
VL 84
IS 25
BP 5156
EP 5158
DI 10.1063/1.1765741
PG 3
WC Physics, Applied
SC Physics
GA 830HD
UT WOS:000222111800030
ER
PT J
AU Du, Y
Atha, S
Hull, R
Groves, JF
Lyubinetsky, I
Baer, DR
AF Du, Y
Atha, S
Hull, R
Groves, JF
Lyubinetsky, I
Baer, DR
TI Focused-ion-beam directed self-assembly of Cu2O islands on SrTiO3(100)
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID WATER; IRRADIATION; SURFACE
AB Nanoscale islands of Cu2O have been synthesized on single-crystal SrTiO3 (100) substrates using oxygen plasma-assisted molecular-beam epitaxy (MBE). Island growth location has been controlled by using an ex situ Ga+ focused ion beam (FIB) to modify the growth surface in discrete locations prior to island synthesis. The FIB modifications have generated surface topography with lateral dimensions of 150-200 nm. Ex situ atomic force microscopy study after island growth reveals that certain FIB substrate modification and MBE growth condition combinations lead to directed self-assembly of metal oxide islands at the edges of the FIB modified zones. (C) 2004 American Instsitute of Physics.
C1 Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA.
Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Du, Y (reprint author), Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA.
EM jgroves@virginia.edu
RI Baer, Donald/J-6191-2013
OI Baer, Donald/0000-0003-0875-5961
NR 15
TC 27
Z9 27
U1 0
U2 12
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUN 21
PY 2004
VL 84
IS 25
BP 5213
EP 5215
DI 10.1063/1.1765212
PG 3
WC Physics, Applied
SC Physics
GA 830HD
UT WOS:000222111800049
ER
PT J
AU Cameron, TM
Gordon, JC
Scott, BL
Tumas, W
AF Cameron, TM
Gordon, JC
Scott, BL
Tumas, W
TI C-H activation of a 2,2 '-bipyridine ligand within (mono)
pentamethylcyclopentadienyl lutetium complexes
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID RARE-EARTH-METALS; ORGANOMETALLIC CHEMISTRY;
ALPHA,ALPHA-DISUBSTITUTED-2,6-PYRIDINEDIMETHOXIDE LIGANDS; LANTHANIDES;
REACTIVITY; ACTINIDES; PYRIDINE
AB We report the activation of a 2,2'-bipyridine ligand within a class of (mono)cyclopentadienyl lanthanide complexes when reacted with carbon monoxide.
C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87544 USA.
RP Cameron, TM (reprint author), Los Alamos Natl Lab, Div Chem, MS J-514, Los Alamos, NM 87544 USA.
EM tcameron@lanl.gov
RI Scott, Brian/D-8995-2017
OI Scott, Brian/0000-0003-0468-5396
NR 18
TC 28
Z9 28
U1 0
U2 4
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PD JUN 21
PY 2004
IS 12
BP 1398
EP 1399
DI 10.1039/b405039h
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA 834LL
UT WOS:000222412500025
PM 15179483
ER
PT J
AU Townsend, D
Lee, SK
Suits, AG
AF Townsend, D
Lee, SK
Suits, AG
TI Orbital polarization from DC slice imaging: S(D-1(2)) alignment in the
photodissociation of ethylene sulfide
SO CHEMICAL PHYSICS
LA English
DT Article
DE reaction dynamics; photodissociation; stereodynamics; vector
correlations; ion imaging
ID ANGULAR-MOMENTUM DISTRIBUTIONS; PHOTOFRAGMENT ALIGNMENT;
VACUUM-ULTRAVIOLET; 193 NM; DISSOCIATION; VELOCITY; PHOTOLYSIS;
COHERENCE; ATOMS; CL-2
AB DC slice imaging [Rev. Sci. Instrum. 74 (2003) 2530], a recently developed high-resolution 'slicing' approach that directly provides the full 3D product distribution in imaging experiments, has been adapted to yield the absolute speed-dependent angular momentum alignment anisotropy parameters in a photodissociation experiment. We present the theoretical machinery for interpretation of a small basis set of sliced experimental images recorded under different laser polarization geometries and then demonstrate its application in the study of electronic orbital angular momentum alignment of excited state S(D-1(2)) atoms following 193.3 nm photodissociation of ethylene sulfide. We find the slicing approach to be a highly sensitive and widely applicable technique for the study of orbital polarization, even in instances where the magnitude of such effects is small. The approach outlined here represents a direct route to the determination of recoil-angle dependent orbital alignment for a continuous range of photofragment kinetic energy release. (C) 2003 Elsevier B.V. All rights reserved.
C1 SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RP Suits, AG (reprint author), SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
EM arthur.suits@sunysb.edu
RI Townsend, Dave/K-3461-2015
NR 44
TC 21
Z9 21
U1 1
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0301-0104
EI 1873-4421
J9 CHEM PHYS
JI Chem. Phys.
PD JUN 21
PY 2004
VL 301
IS 2-3
BP 197
EP 208
DI 10.1016/j.chemphys.2003.10.020
PG 12
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 828NN
UT WOS:000221980100006
ER
PT J
AU Wade, EA
Lorenz, KT
Chandler, DW
Barr, JW
Barnes, GL
Cline, JI
AF Wade, EA
Lorenz, KT
Chandler, DW
Barr, JW
Barnes, GL
Cline, JI
TI Ion imaging studies of product rotational alignment in collisions of NO
(X-2 Pi(1/2), j=0.5) with Ar
SO CHEMICAL PHYSICS
LA English
DT Article
ID DIFFERENTIAL CROSS-SECTIONS; FINE-STRUCTURE TRANSITIONS;
POTENTIAL-ENERGY SURFACES; INELASTIC-SCATTERING; PRESERVING
PROPENSITIES; COUNTERPROPAGATING BEAM; MOLECULAR-COLLISIONS; STERIC
ASYMMETRY; POLARIZATION; HE
AB The collision-induced rotational alignment of NO (X(2)Pi(1/2), v = 0, j = 4.5, 8.5, 11.5, 12.5, and 15.5) is measured for rotationally inelastic scattering of NO (X(2)Pi(1/2), v = 0, j = 0.5) with Ar at 520 +/- 70 cm(-1) of center-of-mass collision energy. The experiments are performed by velocity-mapped ion imaging with polarized 1 + 1' REMPI of the scattered NO product. Differential cross-sections (DCSs), corrected for alignment effects, are also reported. While the alignment correction is important, it does not change the positions of the observed rotational rainbows. The alignment moments and DCSs are compared with calculations using Alexander's CCSD(T) PESs. The theoretical and experimental DCSs show excellent agreement, as do the theoretical and experimental alignment moments for low Delta(j). For high Delta(j) collisions and back-scattered trajectories, which sample the hard wall of the PES, the theoretical and experimental alignment moments show less agreement. (C) 2004 Elsevier B.V. All rights reserved.
C1 Sandia Natl Labs, Combust Res Facil, Livermore, CA 94550 USA.
Univ Nevada, Dept Chem, Reno, NV 89557 USA.
Univ Nevada, Chem Phys Program, Reno, NV 89557 USA.
RP Wade, EA (reprint author), Mills Coll, Dept Chem & Phys, 5000 MacArthur Blvd, Oakland, CA 94613 USA.
EM ewade@mills.edu; chand@sandia.gov; cline@chem.unr.edu
RI Barnes, George/A-3552-2011; Barnes, George/D-6951-2012
NR 60
TC 39
Z9 39
U1 0
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0301-0104
J9 CHEM PHYS
JI Chem. Phys.
PD JUN 21
PY 2004
VL 301
IS 2-3
BP 261
EP 272
DI 10.1016/j.chemphys.2004.02.014
PG 12
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 828NN
UT WOS:000221980100012
ER
PT J
AU Wodtke, AM
Hansen, N
Robinson, JC
Sveum, NE
Goncher, SJ
Neumark, DM
AF Wodtke, AM
Hansen, N
Robinson, JC
Sveum, NE
Goncher, SJ
Neumark, DM
TI The Cl to NCl branching ratio in 248-nm photolysis of chlorine azide
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID 1.315 MU-M; ENERGY-TRANSFER; CHAIN DECOMPOSITION; NCL(A(1)DELTA);
PHOTODISSOCIATION; IODINE; LASER; NM; SPECTROMETER; DETECTOR
AB The primary reaction products from 248-nm chlorine azide photolysis are identified in a collision-free experiment. In contrast to all previous reports, the radical channel producing Cl + N-3 (95 +/- 3%) is seen to dominate the photochemistry. The molecular channel producing NCl + N-2 (5 +/- 3%) was also observed. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA.
Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Wodtke, AM (reprint author), Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA.
EM wodtke@chem.ucsb.edu
RI Neumark, Daniel/B-9551-2009; Hansen, Nils/G-3572-2012; Wodtke,
Alec/I-4848-2012;
OI Neumark, Daniel/0000-0002-3762-9473; Wodtke, Alec/0000-0002-6509-2183
NR 27
TC 15
Z9 15
U1 0
U2 5
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 JUN 21
PY 2004
VL 391
IS 4-6
BP 334
EP 337
DI 10.1016/j.cplett.2004.04.113
PG 4
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 831WU
UT WOS:000222228000025
ER
PT J
AU Chen, J
Bhattacharya, RN
Ren, ZF
AF Chen, J
Bhattacharya, RN
Ren, ZF
TI Processing of electroplated Bi-2212/Ag tapes using a melt-quench and
annealing method
SO JOURNAL OF PHYSICS D-APPLIED PHYSICS
LA English
DT Article
ID FIELD; ELECTRODEPOSITION; SUPERCONDUCTORS; MAGNETIZATION
AB BI-2212 precursor films were deposited on both sides of polycrystalline Ag tapes by electrodeposition. After a melt-quench and annealing process, highly c-axis textured BI-2212 films were obtained on Ag tapes. The full-width at half-maximum of the (008) rocking curve was around 5.8degrees, and scanning electron microscopy measurements indicated that the Bi-2212 films had a dense and melted plate-like structure. The superconducting transition temperature, T-c (zero resistance), was about 82.4 K, and a critical current density, J(c) (75 K, 0T), of 29 kA cm(-2) was observed in transport measurements. A J(c) (4.2 K, 0T) value of about 0.3 MA cm(-2) was calculated from magnetization measurements. The mechanism of formation of the Bi-2212 superconductor in the melt-quench and annealing process is discussed.
C1 Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA.
Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Chen, J (reprint author), Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA.
EM jun_chen@nrel.gov
RI Ren, Zhifeng/B-4275-2014
NR 11
TC 2
Z9 2
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0022-3727
J9 J PHYS D APPL PHYS
JI J. Phys. D-Appl. Phys.
PD JUN 21
PY 2004
VL 37
IS 12
BP 1685
EP 1689
AR PII S0022-3727(04)72976-9
DI 10.1088/0022-3727/37/12/013
PG 5
WC Physics, Applied
SC Physics
GA 835LX
UT WOS:000222486000014
ER
PT J
AU Zachos, C
AF Zachos, C
TI Comment on "Noncommutativity as a possible origin of the
ultrahigh-energy cosmic ray and the TeV photon paradoxes"
SO MODERN PHYSICS LETTERS A
LA English
DT Editorial Material
DE ultra-high-energy cosmic rays; deformation of Lorentz invariance;
non-commutativity
ID INVARIANCE VIOLATION; HARMONIC-OSCILLATOR; Q-ANALOGS; TESTS
AB A Lorentz-noninvariant modification of the kinematic dispersion law was proposed in Ref. 1, claimed to be derivable from q-deformed noncommutative theory, and argued to evade ultrahigh energy threshold anomalies (trans-GKZ-cutoff cosmic rays and TeV-photons) by raising the respective thresholds. It is pointed out that such dispersion laws do not follow from deformed oscillator systems, and the proposed dispersion law is invalidated by tachyonic propagation, as well as photon instability, in addition to the process considered.
C1 Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA.
RP Zachos, C (reprint author), Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA.
EM zachos@anl.gov
RI zachos, cosmas/C-4366-2014
OI zachos, cosmas/0000-0003-4379-3875
NR 26
TC 9
Z9 9
U1 0
U2 1
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0217-7323
EI 1793-6632
J9 MOD PHYS LETT A
JI Mod. Phys. Lett. A
PD JUN 21
PY 2004
VL 19
IS 19
BP 1483
EP 1487
DI 10.1142/S0217732304014082
PG 5
WC Physics, Nuclear; Physics, Particles & Fields; Physics, Mathematical
SC Physics
GA 832HG
UT WOS:000222257500007
ER
PT J
AU Wei, XD
Bade, CM
Caracappa, A
Kageya, T
Lincoln, FC
Lowry, MM
Mahon, JC
Sandorfi, AM
Thorn, CE
Whisnant, CS
AF Wei, XD
Bade, CM
Caracappa, A
Kageya, T
Lincoln, FC
Lowry, MM
Mahon, JC
Sandorfi, AM
Thorn, CE
Whisnant, CS
TI New improvements leading to higher polarization frozen spin HD targets
at the LEGS facility
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 9th International Workshop on Polarized Solid Targets and Techniques
CY OCT 27-29, 2003
CL Bad Honnef, GERMANY
DE HD; polarized target; frozen spin; brute force polarization
ID SOLID HD; RELAXATION
AB Double polarization experiments at the Laser Electron Gamma Source (LEGS) at Brookhaven National Laboratory have been performed with polarized photon beams and a polarized Hydrogen Deuteride (HD) frozen spin target. After polarizing at 15 T and 17 mK and subsequently reaching a frozen spin mode, a target was cold extracted (at 2.5 K and 0.016 T) and installed into an In-Beam Cryostat (IBC) which held the target at 0.7 T and 1.25 K. In-beam relaxation times of 13 days for polarized hydrogen and 36 days for polarized deuterium have been measured. Data were taken with 30% polarized-H and 6% polarized-D, although higher polarization levels have been achieved. Several new improvements are being implemented to improve the operating parameters of polarized HD targets. These include the fabrication of a vibration isolator to lower the polarizing temperature, the purchase of a new IBC to reach longer in-beam relaxation times with higher field and lower temperature (I T and 200 mK), the construction of a new cold transfer cryostat with a higher field (0.13 T) to reduce polarization loss during target transfers, and the installation of a much improved NMR system for polarization calibration and online monitoring. A summary of the existing data, the ongoing modifications and projection for future performance will be discussed. (C) 2004 Elsevier B.V. All rights reserved.
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
Ohio Univ, Athens, OH 45701 USA.
Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA.
James Madison Univ, Harrisonburg, VA 22807 USA.
RP Wei, XD (reprint author), Brookhaven Natl Lab, POB 5000, Upton, NY 11973 USA.
EM xwei@bnl.gov
NR 14
TC 12
Z9 12
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 JUN 21
PY 2004
VL 526
IS 1-2
BP 157
EP 162
DI 10.1016/j.nima.2004.03.168
PG 6
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 830OH
UT WOS:000222131500027
ER
PT J
AU Vasbinder, MJ
Espenson, JH
AF Vasbinder, MJ
Espenson, JH
TI Nucleophilic assistance in rhenium-catalyzed oxygen atom transfer
SO ORGANOMETALLICS
LA English
DT Article
ID PYRIDINE N-OXIDES; CONSTANTS; KINETICS; MONOMERIZATION; MECHANISM;
OXIDATION; COMPLEXES; DIMER
AB Oxygen atom transfer from pyridine N-oxides (PyO) to triphenylphosphine is catalyzed by MeReO-(mtp)PPh3, 1, where mtpH(2) is 2-(mercaptomethyl)thiophenol, at a rate given by v = k(c)[1][PyO](2)/[PPh3]. When, however, other nucleophiles N are added, the rate law becomes v = k(N)[1]PYO][N]/[PPh3], and values of k(N) correlate with the nucleophilic strength of the added cocatalyst N.
C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ, Dept Chem, Ames, IA 50011 USA.
RP Espenson, JH (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
NR 17
TC 9
Z9 9
U1 0
U2 3
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0276-7333
J9 ORGANOMETALLICS
JI Organometallics
PD JUN 21
PY 2004
VL 23
IS 13
BP 3355
EP 3358
DI 10.1021/om0498448
PG 4
WC Chemistry, Inorganic & Nuclear; Chemistry, Organic
SC Chemistry
GA 830AJ
UT WOS:000222093700041
ER
PT J
AU Li, WG
Johnson, CL
Wang, HL
AF Li, WG
Johnson, CL
Wang, HL
TI Preparation and characterization of monolithic polyaniline-graphite
composite actuators
SO POLYMER
LA English
DT Article
DE polyaniline; actuator; graphite
ID CONDUCTING POLYMERS; ARTIFICIAL MUSCLES; POLYPYRROLE; REDOX; TRANSPORT
AB We report here the fabrication and characterization of novel, monolithic electrochemical actuators based on polyaniline (PANI) and a micrometer-sized graphite powder. These PANI-graphite thin films have a graphite-rich layer that renders composite thin film conductive at all redox states. The asymmetric distribution of graphite also allows for a bending movement as the films are subjected to electrochemical oxidation and reduction. The unique asymmetric structure and high conductivity of the films allow the actuators to be operated at lower redox potentials, with larger bending angles and longer life cycles. Our study also shows that most of the bending movements occur during the transition between the emeraldine base and the pernigraniline base. Judging from the CV and from the current generated when the square wave potential is applied. we note that the actuators appear very stable and show no signs of degradation after 50,000 working cycles operated at 1 Hz. The life cycles of these actuators exceed 120,000 cycles (> 33.6 h) in a 1.0 M CH3SO3H aqueous solution. As we extend the oxidation potential to greater than 0.8 V, the PANI-graphite thin film starts to degrade with time. These results reveal the optimum conditions under which the actuators should be operated. (C) 2004 Published by Elsevier Ltd.
C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
RP Wang, HL (reprint author), Los Alamos Natl Lab, Biosci Div, MSJ586,POB 1663, Los Alamos, NM 87545 USA.
EM hwang@lanl.gov
NR 22
TC 23
Z9 26
U1 1
U2 5
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0032-3861
J9 POLYMER
JI Polymer
PD JUN 21
PY 2004
VL 45
IS 14
BP 4769
EP 4775
DI 10.1016/j.polymer.2004.05.010
PG 7
WC Polymer Science
SC Polymer Science
GA 832RC
UT WOS:000222283600018
ER
PT J
AU Atkins, R
Benbow, W
Berley, D
Blaufuss, E
Bussons, J
Coyne, DG
DeYoung, T
Dingus, BL
Dorfan, DE
Ellsworth, RW
Fleysher, L
Fleysher, R
Gisler, G
Gonzalez, MM
Goodman, JA
Haines, TJ
Hays, E
Hoffman, CM
Kelley, LA
Lansdell, CP
Linnemann, JT
McEnery, JE
Miller, RS
Mincer, AI
Morales, MF
Nemethy, P
Noyes, D
Ryan, JM
Samuelson, FW
Shoup, A
Sinnis, G
Smith, AJ
Sullivan, GW
Williams, DA
Westerhoff, S
Wilson, ME
Xu, XW
Yodh, GB
AF Atkins, R
Benbow, W
Berley, D
Blaufuss, E
Bussons, J
Coyne, DG
DeYoung, T
Dingus, BL
Dorfan, DE
Ellsworth, RW
Fleysher, L
Fleysher, R
Gisler, G
Gonzalez, MM
Goodman, JA
Haines, TJ
Hays, E
Hoffman, CM
Kelley, LA
Lansdell, CP
Linnemann, JT
McEnery, JE
Miller, RS
Mincer, AI
Morales, MF
Nemethy, P
Noyes, D
Ryan, JM
Samuelson, FW
Shoup, A
Sinnis, G
Smith, AJ
Sullivan, GW
Williams, DA
Westerhoff, S
Wilson, ME
Xu, XW
Yodh, GB
TI TeV gamma-ray survey of the northern hemisphere sky using the Milagro
observatory
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies : active; gamma rays : observations; surveys
ID HIGH-ENERGY; CRAB-NEBULA; POINT SOURCES; ABSORPTION; RADIATION; SPECTRUM
AB Milagro is a water Cerenkov extensive air shower array that continuously monitors the entire overhead sky in the TeV energy band. The results from an analysis of similar to3 yr of data (2000 December-2003 November) are presented. The data have been searched for steady point sources of TeV gamma rays between declinations of 1.degrees1 and 80degrees. Two sources are detected, the Crab Nebula and the active galaxy Mrk 421. For the remainder of the northern hemisphere, we set 95% confidence level (CL) upper limits between 275 and 600 mcrab (4.8 x 10(-12) to 10.5 x 10(-12) cm(-2) s(-1)) above 1 TeV for source declinations between 5degrees and 70degrees. Since the sensitivity of Milagro depends on the spectrum of the source at the top of the atmosphere, the dependence of the limits on the spectrum of a candidate source is presented. Because high-energy gamma rays from extragalactic sources are absorbed by interactions with the extragalactic background light, the dependence of the flux limits on the redshift of a candidate source are given. The upper limits presented here are over an order of magnitude more stringent than previously published limits from TeV gamma-ray all-sky surveys.
C1 Univ Wisconsin, Madison, WI 53706 USA.
Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA.
Univ Maryland, College Pk, MD 20742 USA.
George Mason Univ, Fairfax, VA 22030 USA.
NYU, New York, NY 10003 USA.
Michigan State Univ, E Lansing, MI 48824 USA.
Univ New Hampshire, Durham, NH 03824 USA.
Univ Calif Irvine, Irvine, CA 92717 USA.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Sinnis, G (reprint author), Los Alamos Natl Lab, MS H803, Los Alamos, NM 87545 USA.
EM gus@lanl.gov
RI Hays, Elizabeth/D-3257-2012;
OI Mincer, Allen/0000-0002-6307-1418; Dingus, Brenda/0000-0001-8451-7450
NR 19
TC 60
Z9 60
U1 0
U2 1
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 JUN 20
PY 2004
VL 608
IS 2
BP 680
EP 685
DI 10.1086/420880
PN 1
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 831HA
UT WOS:000222184300006
ER
PT J
AU Bell, JB
Day, MS
Rendleman, CA
Woosley, SE
Zingale, M
AF Bell, JB
Day, MS
Rendleman, CA
Woosley, SE
Zingale, M
TI Direct numerical simulations of type Ia supernovae flames. II. The
Rayleigh-Taylor instability
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE conduction; hydrodynamics; methods : numerical; nuclear,reactions,
nucleosynthesis, abundances; supernovae : general; white dwarfs
ID NUCLEAR FLAMES; WHITE-DWARFS; THERMONUCLEAR FLAMES; DETONATION MODEL;
DEFLAGRATIONS; PROPAGATION; EXPLOSIONS; TRANSITION; FLUIDS; RATES
AB A Type la supernova explosion likely begins as a nuclear runaway near the center of a carbon-oxygen white dwarf. The outward-propagating flame is unstable to the Landau-Darrieus, Rayleigh-Taylor, and Kelvin-Helmholtz instabilities, which serve to accelerate it to a large fraction of the speed of sound. We investigate the Rayleigh-Taylor unstable flame at the transition from the flamelet regime to the distributed burning regime, around densities of 10(7) g cm(-3), through detailed, fully resolved simulations. A low Mach number, adaptive mesh hydrodynamics code is used to achieve the necessary resolution and long timescales. As the density is varied, we see a fundamental change in the character of the burning: at the low end of the density range, the Rayleigh-Taylor instability dominates the burning, whereas at the high end, the burning suppresses the instability. In all cases, significant acceleration of the flame is observed, limited only by the size of the domain we are able to study. We discuss the implications of these results on the potential for a deflagration to detonation transition.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Computat Sci & Engn, Berkeley, CA 94720 USA.
Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
RP Bell, JB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Computat Sci & Engn, Berkeley, CA 94720 USA.
OI Zingale, Michael/0000-0001-8401-030X
NR 58
TC 36
Z9 36
U1 2
U2 5
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 JUN 20
PY 2004
VL 608
IS 2
BP 883
EP 906
DI 10.1086/420841
PN 1
PG 24
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 831HA
UT WOS:000222184300023
ER
PT J
AU Riley, P
Gosling, JT
Crooker, NU
AF Riley, P
Gosling, JT
Crooker, NU
TI Ulysses observations of the magnetic connectivity between coronal mass
ejections and the sun
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE solar wind; sun : activity; sun : corona; sun : coronal mass ejections
(CMEs); sun : magnetic fields
ID SOLAR-WIND; CLOUDS; ORIGIN; FIELD
AB We have investigated the magnetic connectivity of coronal mass ejections (CMEs) to the Sun using Ulysses observations of suprathermal electrons at various distances between 1 and 5.2 AU. Drawing on ideas concerning the eruption and evolution of CMEs, we had anticipated that there might be a tendency for CMEs to contain progressively more open field lines, as reconnection back at the Sun either opened or completely disconnected previously closed field lines threading the CMEs. Our results, however, did not yield any discernible trend. By combining the potential contribution of CMEs to the heliospheric flux with the observed buildup of flux during the course of the solar cycle, we also derive a lower limit for the reconnection rate of CMEs that is sufficient to avoid the "flux catastrophe" paradox. This rate is well below our threshold of detectability.
C1 Sci Applicat Int Corp, San Diego, CA 92121 USA.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
Boston Univ, Ctr Space Phys, Boston, MA 02215 USA.
RP Riley, P (reprint author), Sci Applicat Int Corp, San Diego, CA 92121 USA.
EM pete.riley@saic.com; jgosling@lasl.gov; crooker@lanl.gov
NR 17
TC 17
Z9 17
U1 0
U2 1
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 JUN 20
PY 2004
VL 608
IS 2
BP 1100
EP 1105
DI 10.1086/420811
PN 1
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 831HA
UT WOS:000222184300040
ER
PT J
AU Farihi, J
Becklin, EE
Macintosh, BA
AF Farihi, J
Becklin, EE
Macintosh, BA
TI Mid-infrared observations of Van Maanen 2: No substellar companion
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE binaries : general; stars : individual (van Maanen 2); stars : low-mass;
brown dwarfs; white dwarfs
ID FINAL MASS RELATION; WHITE-DWARFS; BROWN DWARFS; T-DWARFS; TELESCOPE;
FACILITY; STARS
AB The results of a comprehensive infrared imaging search for the putative 0.06 M-circle dot astrometric companion to the 4.4 pc white dwarf van Mannen 2 are reported. Adaptive optics images acquired at 3.8 mum reveal a diffractionlimited core of 0".09 and no direct evidence of a secondary. Models predict that at 5 Gyr, a 50M, brown dwarf would be only I mag fainter than van Maanen 2 at this wavelength, and the astrometric analysis suggested a separation of 0".2. In the case of a chance alignment along the line of sight, a 0.4 mag excess should be measured. An independent photometric observation at the same wavelength reveals no excess. In addition, there exist published Infrared Space Observatory observations of van Maanen 2 at 6.8 and 15.0 mum that are consistent with the photospheric flux of a 6750 K white dwarf. If recent brown dwarf models are correct, there is no substellar companion with T-eff greater than or similar to 500 K.
C1 Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94551 USA.
RP Farihi, J (reprint author), Univ Calif Los Angeles, Dept Phys & Astron, 8371 Math Sci Bldg, Los Angeles, CA 90095 USA.
EM jfarihi@astro.ucla.edu; becklin@astro.ucla.edu; bmac@igpp.llnl.gov
OI Farihi, Jay/0000-0003-1748-602X
NR 18
TC 4
Z9 4
U1 0
U2 1
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 JUN 20
PY 2004
VL 608
IS 2
BP L109
EP L112
DI 10.1086/422502
PN 2
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 831HB
UT WOS:000222184400009
ER
PT J
AU Ostrom, H
Fohlisch, A
Nyberg, M
Weinelt, M
Heske, C
Pettersson, LGM
Nilsson, A
AF Ostrom, H
Fohlisch, A
Nyberg, M
Weinelt, M
Heske, C
Pettersson, LGM
Nilsson, A
TI Ethylene on Cu(110) and Ni(110): electronic structure and bonding
derived from X-ray spectroscopy and theory
SO SURFACE SCIENCE
LA English
DT Article
DE chemisorption; alkenes; density functional calculations; X-ray
absorption spectroscopy; X-ray emission; surface electronic phenomena
(work function; surface potential,surface states, etc.)
ID ENERGY-LOSS SPECTROSCOPY; CORE-LEVEL SPECTROSCOPY; NOBLE-METAL SURFACES;
K-SHELL EXCITATION; EMISSION-SPECTROSCOPY; PHOTOELECTRON DIFFRACTION;
ABSORPTION-SPECTROSCOPY; ADSORPTION GEOMETRY; ORIENTED MOLECULES; SHAPE
RESONANCES
AB The bonding of ethylene to Cu(110) and Ni(110) is analyzed in detail using symmetry-resolved X-ray absorption (XAS) and emission (XES) spectroscopies in conjunction with density functional theory (DFT) calculations of geometric structure and spectra. XES, which probes the occupied valence states, reveals the formation of bonding and non-bonding orbitals of pi-3d as well as pi*-3d character. Additional mixing of sigma and pi states indicates rehybridization upon adsorption. The anti-bonding pi-3d and pi*-3d combinations are unoccupied and seen in XAS. A lower intensity of the pi* transition for Ni is evidence of larger pi* occupancy upon bonding. The position of the sigma* shape-resonance indicates a 0.02 Angstrom longer C-C bond on Ni than on Cu, in good agreement with the DFT structure optimizations. The XE spectra are well-reproduced both by specific spectrum calculations based on cluster models and by the carbon p-density of states calculated using periodic boundary conditions. The contribution of both pi and pi* levels to the new, surface-induced occupied states close to the Fermi-level tends support to the traditional Dewar-Chatt-Duncan son picture of the bonding. Theoretical charge-density difference plots support an alternative view of ethylene bonding in terms of the specific involvement of the excited molecular triplet state. Based on the variation in XE intensities the main difference between ethylene bonding to Cu and Ni is found to be an about two times larger occupancy of the pi* orbital upon chemisorption on the transition metal, which comes along with C-C bond elongation and stronger sigma-pi rehybridization. (C) 2004 Elsevier B.V. All rights reserved.
C1 Stockholm Univ, Fysikum, AlbaNova Univ Ctr, SE-10691 Stockholm, Sweden.
Univ Hamburg, Inst Phys Expt, D-22761 Hamburg, Germany.
Univ Erlangen Nurnberg, Lehrstuhl Festkorperphys, D-91058 Erlangen, Germany.
Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA.
Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
RP Ostrom, H (reprint author), Stockholm Univ, Fysikum, AlbaNova Univ Ctr, SE-10691 Stockholm, Sweden.
EM ostrom@physto.se; nilsson@slac.stanford.edu
RI Nilsson, Anders/E-1943-2011; Pettersson, Lars/F-8428-2011; Pettersson,
Lars/J-4925-2013;
OI Nilsson, Anders/0000-0003-1968-8696; Pettersson,
Lars/0000-0003-1133-9934; Alexander, Fohlisch/0000-0003-4126-8233
NR 58
TC 24
Z9 24
U1 0
U2 12
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD JUN 20
PY 2004
VL 559
IS 2-3
BP 85
EP 99
DI 10.1016/j.susc.2004.04.041
PG 15
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 830WR
UT WOS:000222155400006
ER
PT J
AU Zhou, GW
Yang, JC
AF Zhou, GW
Yang, JC
TI In situ UHV-TEM investigation of the kinetics of initial stages of
oxidation on the roughened Cu(110) surface
SO SURFACE SCIENCE
LA English
DT Article
DE copper; oxidation; surface structure; morphology; roughness; and
topography; electron microscopy; nucleation; surface diffusion
ID COPPER 110 SURFACE; X-RAY-DIFFRACTION; INSITU OBSERVATION;
SINGLE-CRYSTAL; TEMPERATURE; CU2O; CU(001); GROWTH; NUCLEATION;
MICROSCOPY
AB The initial stages of oxidation on roughened Cu(110) surface were explored by an in situ ultra-high vacuum transmission electron microscope (UHV-TEM). The dynamic observation of the nucleation and growth of Cu oxide islands shows a highly enhanced nucleation rate on the roughened Cu(110) surface. The kinetic data obtained from the initial stages of the oxidation indicate that oxygen surface diffusion plays a dominant role in the nucleation of the oxide islands; however, the growth of the three-dimensional oxide islands is caused by both oxygen surface diffusion and direct impingement. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ Pittsburgh, Dept Mat Sci & Engn, Pittsburgh, PA 15261 USA.
RP Zhou, GW (reprint author), Argonne Natl Lab, Div Sci Mat, 9700 S Cass Ave,Bldg 212, Argonne, IL 60439 USA.
EM gzhou@anl.gov
NR 30
TC 25
Z9 25
U1 5
U2 18
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD JUN 20
PY 2004
VL 559
IS 2-3
BP 100
EP 110
DI 10.1016/j.susc.2004.04.046
PG 11
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 830WR
UT WOS:000222155400007
ER
PT J
AU Gao, W
Wang, CM
Wang, HQ
Henrich, VE
Altman, EI
AF Gao, W
Wang, CM
Wang, HQ
Henrich, VE
Altman, EI
TI Growth and surface structure of vanadium oxide on anatase(001)
SO SURFACE SCIENCE
LA English
DT Article
DE growth; surface structure; morphology; roughness and topography;
vanadium oxide; titanium oxide; reflection highenergy electron
diffraction (RHEED); low energy electron diffraction (LEED)
ID CATALYSTS; MODEL; V2O5; REACTIVITY; TIO2(001); TIO2(110); FILMS;
MICROSCOPE; OXIDATION; V2O5/TIO2
AB Oxygen plasma-assisted molecular beam epitaxy (OPA-MBE) of vanadium oxide on (1x4)-reconstructed anatase (001) thin films was studied using reflection high energy electron diffraction (RHEED), low energy electron diffraction (LEED), X-ray and ultraviolet photoelectron spectroscopy (XPS and UPS), X-ray diffraction (XRD), and transmission electron microscopy (TEM). XPS and UPS results showed that the vanadium was predominantly in the 5+ oxidation state after deposition of a monolayer at 525 K. After 1 ML of vanadia, was deposited, the anatase (1x4)/(4x1) LEED and RHEED patterns were replaced by (1x1) patterns indicating that the vanadia lifts the reconstruction and sugesting that the monolayer is pseudomorphic. At 525 K, the V5+ oxidation state predominated in thicker films, however. no discernible LEED or RHEED patterns were seen after a few monolayers were deposited indicating that V2O5 epitaxy cannot be continued beyond 1 ML. When the growth temperature was increased to 750 K, RHEED patterns indicated no change in the surface structure after more than 20 ML of vanadia, were deposited. Under these conditions. XPS peak positions were consistent with VO2. After growth at 775 K a c(2x2) LEED pattern attributed to half a monolayer of adsorbed oxygen on the VO2 surface was observed. The surface characterization data all pointed towards pseudomorphic growth of VO2 with a half monolayer of capping oxygen allowing the monolayer to achieve the V2O5 stoichiometry while maintaining the anatase structure. Bulk XRD data, however, were consistent with VO2(B), V6O13. and rutile VO2; none of which expose surfaces with the periodicity observed with RHEED and LEED. The reasons for the differences between the surface and bulk characterization are discussed. (C) 2004 Elsevier B.V. All rights reserved.
C1 Yale Univ, Dept Chem Engn, New Haven, CT 06520 USA.
Pacific NW Natl Lab, Fundamental Sci Div, Richland, WA 99352 USA.
Yale Univ, Dept Appl Phys, New Haven, CT 06520 USA.
RP Altman, EI (reprint author), Yale Univ, Dept Chem Engn, POB 208286, New Haven, CT 06520 USA.
EM eric.altman@yale.edu
RI Wang, Hui-Qiong/H-4690-2011;
OI Wang, Hui-Qiong/0000-0002-0495-3146
NR 27
TC 31
Z9 32
U1 4
U2 52
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD JUN 20
PY 2004
VL 559
IS 2-3
BP 201
EP 213
DI 10.1016/j.susc.2004.04.028
PG 13
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 830WR
UT WOS:000222155400016
ER
PT J
AU Vijay, S
Wolf, EE
Miller, JT
Kropf, AJ
AF Vijay, S
Wolf, EE
Miller, JT
Kropf, AJ
TI A highly active and stable platinum-modified sulfated zirconia catalyst
- Part 2. EXAFS studies of the effect of pretreatment on the state of
platinum
SO APPLIED CATALYSIS A-GENERAL
LA English
DT Article
DE platinum; sulfated zirconia; isomerization; preparation; EXAFS; XANES;
state of platinum
ID RAY-ABSORPTION-SPECTROSCOPY; OXIDE; ISOMERIZATION; ION
AB This work presents a detailed EXAFS study of platinum-modified sulfated zirconia catalysts that were prepared according to a three step method. which led to highly active and stable catalyst for n-pentane isomerization reaction. EXAFS carried out on the active catalysts prepared from sulfated zirconia calcined at higher temperature and reduction following impregnation with Pt, give evidence of large metallic Pt crystallites whereas similar catalysts prepared from sulfated zirconia calcined at lower temperature of 550 degreesC had mostly Pt-S co-ordination. The presence of the larger Pt crystallites seems necessary for arresting the rapid deactivation of the catalyst and increases its stability. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ Notre Dame, Dept Chem Engn, Notre Dame, IN 46556 USA.
BP Res Ctr, Naperville, IL 60563 USA.
Argonne Natl Lab, Div Chem Engn, Argonne, IL 60439 USA.
RP Wolf, EE (reprint author), Univ Notre Dame, Dept Chem Engn, Notre Dame, IN 46556 USA.
EM wolf.1@nd.edu
RI ID, MRCAT/G-7586-2011
NR 18
TC 10
Z9 19
U1 0
U2 8
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 JUN 18
PY 2004
VL 264
IS 1
BP 125
EP 130
DI 10.1016/j.apcata.2003.12.037
PG 6
WC Chemistry, Physical; Environmental Sciences
SC Chemistry; Environmental Sciences & Ecology
GA 823OY
UT WOS:000221623800016
ER
PT J
AU Johnson, MD
Yu, LR
Conrads, TP
Kinoshita, Y
Uo, T
Matthews, JD
Lee, SW
Smith, RD
Veenstra, TD
Morrison, RS
AF Johnson, MD
Yu, LR
Conrads, TP
Kinoshita, Y
Uo, T
Matthews, JD
Lee, SW
Smith, RD
Veenstra, TD
Morrison, RS
TI Proteome analysis of DNA damage-induced neuronal death using high
throughput mass spectrometry
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID RESPONSE MEDIATOR PROTEIN-2; ACTIN DEPOLYMERIZING FACTOR;
ALZHEIMERS-DISEASE; CELL-DEATH; PARKINSONS-DISEASE; OXIDATIVE STRESS;
NEUROFIBRILLARY TANGLES; TRANSCRIPTIONAL TARGET; LIQUID-CHROMATOGRAPHY;
HIPPOCAMPAL-NEURONS
AB Isotope-coded affinity tag reagents and high throughput mass spectrometry were used to quantitate changes in the expression of 150 proteins in mouse wild-type (p53(+/+)) cortical neurons undergoing DNA damage-induced death. Immunological techniques confirmed several of the changes in protein expression, but microarray analysis indicated that many of these changes were not accompanied by altered mRNA expression. Proteome analysis revealed perturbations in mitochondrial function, free radical production, and neuritogenesis that were not observed in p53-deficient neurons. Changes in Tau, cofilin, and other proteins recapitulated abnormalities observed in neurodegenerative states in vivo. Additionally, DNA damage caused a p53-dependent decrease in expression of members of the protein kinase A (PKA) signaling pathway. PKA inhibition promoted death in the absence of DNA damage, revealing a novel mechanism by which endogenous down-regulation of PKA signaling may contribute to p53-dependent neuronal death. These data demonstrate the power of high throughput mass spectrometry for quantitative analysis of the neuronal proteome.
C1 Univ Washington, Sch Med, Dept Neurol Surg, Seattle, WA 98195 USA.
NCI, Biomed Proteom Program, SAIC Frederick, Frederick, MD 21702 USA.
Pacific NW Natl Lab, Environm & Mol Sci Lab, Richland, WA 99352 USA.
Harvard Univ, Brigham & Womens Hosp, Sch Med, Dept Neurol Surg, Boston, MA 02115 USA.
RP Morrison, RS (reprint author), Univ Washington, Sch Med, Dept Neurol Surg, Box 356470,1959 NE Pacific St, Seattle, WA 98195 USA.
EM yael@u.washington.edu
RI Smith, Richard/J-3664-2012; Lee, Sang-Won/H-6760-2013
OI Smith, Richard/0000-0002-2381-2349; Lee, Sang-Won/0000-0002-5042-0084
FU NINDS NIH HHS [K08 NS43482-01, NS35533, NS39617, NS41714]
NR 48
TC 22
Z9 23
U1 0
U2 2
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 JUN 18
PY 2004
VL 279
IS 25
BP 26685
EP 26697
DI 10.1074/jbc.M401274200
PG 13
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 828VY
UT WOS:000222003000095
PM 15060066
ER
PT J
AU Sorensen, JH
Shumpert, BL
Vogt, BM
AF Sorensen, JH
Shumpert, BL
Vogt, BM
TI Planning for protective action decision making: evacuate or
shelter-in-place
SO JOURNAL OF HAZARDOUS MATERIALS
LA English
DT Article
DE protective action decision making; evacuation; shelter-in-place;
emergency planning; hazardous chemical response
ID STATIONARY; EMERGENCY
AB Protecting the public from an airborne hazardous chemical release requires that appropriate protective actions be selected quickly. When deciding whether to recommend evacuation or shelter-in-place, decision makers must weigh the interaction of numerous factors that characterize the release, the meteorological conditions, and the populations that may be affected. This article examines the components of the protective action decision process and describes steps that should be taken in a planning context to prepare for efficient decision making during an emergency. Methods of organizing information to facilitate decision making are identified, and a model useful for detailed analysis of specific emergency scenarios is described. (C) 2004 Elsevier B.V. All rights reserved.
C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Shumpert, BL (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA.
EM shumpertbl@ornl.gov
NR 37
TC 50
Z9 53
U1 0
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3894
J9 J HAZARD MATER
JI J. Hazard. Mater.
PD JUN 18
PY 2004
VL 109
IS 1-3
BP 1
EP 11
DI 10.1016/j.jhazmat.2004.03.004
PG 11
WC Engineering, Environmental; Engineering, Civil; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA 831JT
UT WOS:000222191400001
PM 15177740
ER
PT J
AU Ando, Y
Ono, S
Sun, XF
Takeya, J
Balakirev, FF
Betts, JB
Boebinger, GS
AF Ando, Y
Ono, S
Sun, XF
Takeya, J
Balakirev, FF
Betts, JB
Boebinger, GS
TI Quantum phase transitions in the cuprate superconductor
Bi2Sr2-xLaxCuO6+delta
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID HIGH-TEMPERATURE SUPERCONDUCTOR; QUASI-PARTICLE TRANSPORT; D-WAVE
SUPERCONDUCTORS; CRITICAL-BEHAVIOR; MAGNETIC-FIELD; NORMAL-STATE;
CRITICALITY; INSULATOR; ORDER; HOLES
AB To elucidate a quantum phase transition (QPT) in Bi2Sr2-xLaxCuO6+delta, we measure charge and heat transport properties at very low temperatures and examine the following characteristics for a wide range of doping: normal-state resistivity anisotropy under 58 T, temperature dependence of the in-plane thermal conductivity kappa(ab), and the magnetic-field dependence of kappa(ab). It turns out that all of them show signatures of a QPT at the 1/8 hole doping. Together with the recent normal-state Hall measurements under 58 T that signified the existence of a QPT at optimum doping, the present results indicate that there are two QPTs in the superconducting doping regime of this material.
C1 Cent Res Inst Elect Power Ind, Tokyo 2018511, Japan.
Los Alamos Natl Lab, NHMFL, Los Alamos, NM 87545 USA.
RP Ando, Y (reprint author), Cent Res Inst Elect Power Ind, Tokyo 2018511, Japan.
EM ando@criepi.denken.or.jp
RI Ando, Yoichi/B-8163-2013
OI Ando, Yoichi/0000-0002-3553-3355
NR 36
TC 38
Z9 39
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 JUN 18
PY 2004
VL 92
IS 24
AR 247004
DI 10.1103/PhysRevLett.92.247004
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 830HO
UT WOS:000222112900054
PM 15245125
ER
PT J
AU Aubert, B
Barate, R
Boutigny, D
Couderc, F
Gaillard, JM
Hicheur, A
Karyotakis, Y
Lees, JP
Tisserand, V
Zghiche, A
Palano, A
Pompili, A
Chen, JC
Qi, ND
Rong, G
Wang, P
Zhu, YS
Eigen, G
Ofte, I
Stugu, B
Abrams, GS
Borgland, AW
Breon, AB
Brown, DN
Button-Shafer, J
Cahn, RN
Charles, E
Day, CT
Gill, MS
Gritsan, AV
Groysman, Y
Jacobsen, RG
Kadel, RW
Kadyk, J
Kerth, LT
Kolomensky, YG
Kukartsev, G
LeClerc, C
Levi, ME
Lynch, G
Mir, LM
Oddone, PJ
Orimoto, TJ
Pripstein, M
Roe, NA
Ronan, MT
Shelkov, VG
Telnov, AV
Wenzel, WA
Ford, K
Harrison, TJ
Hawkes, CM
Morgan, SE
Watson, AT
Watson, NK
Fritsch, M
Goetzen, K
Held, T
Koch, H
Lewandowski, B
Pelizaeus, M
Steinke, M
Boyd, JT
Chevalier, N
Cottingham, WN
Kelly, MP
Latham, TE
Wilson, FF
Abe, K
Cuhadar-Donszelmann, T
Hearty, C
Mattison, TS
McKenna, JA
Thiessen, D
Kyberd, P
Teodorescu, L
Blinov, VE
Bukin, AD
Druzhinin, VP
Golubev, VB
Ivanchenko, VN
Kravchenko, EA
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Yushkov, AN
Best, D
Bruinsma, M
Chao, M
Eschrich, I
Kirkby, D
Lankford, AJ
Mandelkern, M
Mommsen, RK
Roethel, W
Stoker, DP
Buchanan, C
Hartfiel, BL
Gary, JW
Shen, BC
Wang, K
del Re, D
Hadavand, HK
Hill, EJ
MacFarlane, DB
Paar, HP
Rahatlou, S
Sharma, V
Berryhill, JW
Campagnari, C
Dahmes, B
Levy, SL
Long, O
Lu, A
Mazur, MA
Richman, JD
Verkerke, W
Beck, TW
Eisner, AM
Heusch, CA
Lockman, WS
Schalk, T
Schmitz, RE
Schumm, BA
Seiden, A
Spradlin, P
Williams, DC
Wilson, MG
Albert, J
Chen, E
Dubois-Felsmann, GP
Dvoretskii, A
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Ryd, A
Samuel, A
Yang, S
Jayatilleke, S
Mancinelli, G
Meadows, BT
Sokoloff, MD
Abe, T
Blanc, F
Bloom, P
Chen, S
Clark, PJ
Ford, WT
Nauenberg, U
Olivas, A
Rankin, P
Smith, JG
van Hoek, WC
Zhang, L
Harton, JL
Hu, T
Soffer, A
Toki, WH
Wilson, RJ
Altenburg, D
Brandt, T
Brose, J
Colberg, T
Dickopp, M
Feltresi, E
Hauke, A
Lacker, HM
Maly, E
Muller-Pfefferkorn, R
Nogowski, R
Otto, S
Schubert, J
Schubert, KR
Schwierz, R
Spaan, B
Bernard, D
Bonneaud, GR
Brochard, F
Grenier, P
Thiebaux, C
Vasileiadis, G
Verderi, M
Bard, DJ
Khan, A
Lavin, D
Muheim, F
Playfer, S
Andreotti, M
Azzolini, V
Bettoni, D
Bozzi, C
Calabrese, R
Cibinetto, G
Luppi, E
Negrini, M
Sarti, A
Treadwell, E
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Finocchiaro, G
Patteri, P
Piccolo, M
Zallo, A
Buzzo, A
Capra, R
Contri, R
Crosetti, G
Lo Vetere, M
Macri, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Bailey, S
Brandenburg, G
Morii, M
Won, E
Dubitzky, RS
Langenegger, U
Bhimji, W
Bowerman, DA
Dauncey, PD
Egede, U
Gaillard, JR
Morton, GW
Nash, JA
Taylor, GP
Grenier, GJ
Lee, SJ
Mallik, U
Cochran, J
Crawley, HB
Lamsa, J
Meyer, WT
Prell, S
Rosenberg, EI
Yi, J
Davier, M
Grosdidier, G
Hocker, A
Laplace, S
Le Diberder, F
Lepeltier, V
Lutz, AM
Petersen, TC
Plaszczynski, S
Schune, MH
Tantot, L
Wormser, G
Cheng, CH
Lange, DJ
Simani, MC
Wright, DM
Bevan, AJ
Coleman, JP
Fry, JR
Gabathuler, E
Gamet, R
Kay, M
Parry, RJ
Payne, DJ
Sloane, RJ
Touramanis, C
Back, JJ
Harrison, PF
Mohanty, GB
Brown, CL
Cowan, G
Flack, RL
Flaecher, HU
George, S
Green, MG
Kurup, A
Marker, CE
McMahon, TR
Ricciardi, S
Salvatore, F
Vaitsas, G
Winter, MA
Brown, D
Davis, CL
Allison, J
Barlow, NR
Barlow, RJ
Hart, PA
Hodgkinson, MC
Lafferty, GD
Lyon, AJ
Williams, JC
Farbin, A
Hulsbergen, WD
Jawahery, A
Kovalskyi, D
Lae, CK
Lillard, V
Roberts, DA
Blaylock, G
Dallapiccola, C
Flood, KT
Hertzbach, SS
Kofler, R
Koptchev, VB
Moore, TB
Saremi, S
Staengle, H
Willocq, S
Cowan, R
Sciolla, G
Taylor, F
Yamamoto, RK
Mangeol, DJJ
Patel, PM
Robertson, SH
Lazzaro, A
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Reidy, J
Sanders, DA
Summers, DJ
Zhao, HW
Brunet, S
Cote, D
Taras, P
Nicholson, H
Cartaro, C
Cavallo, N
Fabozzi, F
Gatto, C
Lista, L
Monorchio, D
Paolucci, P
Piccolo, D
Sciacca, C
Baak, M
Raven, G
Wilden, L
Jessop, CP
LoSecco, JM
Gabriel, TA
Allmendinger, T
Brau, B
Gan, KK
Honscheid, K
Hufnagel, D
Kagan, H
Kass, R
Pulliam, T
Ter-Antonyan, R
Wong, QK
Brau, J
Frey, R
Igonkina, O
Potter, CT
Sinev, NB
Strom, D
Torrence, E
Colecchia, F
Dorigo, A
Galeazzi, F
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Tiozzo, G
Voci, C
Benayoun, M
Briand, H
Chauveau, J
David, P
de la Vaissiere, C
Del Buono, L
Hamon, O
John, MJJ
Leruste, P
Ocariz, J
Pivk, M
Roos, L
T'Jampens, S
Therin, G
Manfredi, PF
Re, V
Behera, PK
Gladney, L
Guo, QH
Panetta, J
Anulli, F
Biasini, M
Peruzzi, IM
Pioppi, M
Angelini, C
Batignani, G
Bettarini, S
Bondioli, M
Bucci, F
Calderini, G
Carpinelli, M
Del Gamba, V
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Martinez-Vidal, F
Morganti, M
Neri, N
Paoloni, E
Rama, M
Rizzo, G
Sandrelli, F
Walsh, J
Haire, M
Judd, D
Paick, K
Wagoner, DE
Danielson, N
Elmer, P
Lu, C
Miftakov, V
Olsen, J
Smith, AJS
Varnes, EW
Bellini, F
Cavoto, G
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Li Gioi, L
Mazzoni, MA
Morganti, S
Pierini, M
Piredda, G
Tehrani, FS
Voena, C
Christ, S
Wagner, G
Waldi, R
Adye, T
De Groot, N
Franek, B
Geddes, NI
Gopal, GP
Olaiya, EO
Xella, SM
Aleksan, R
Emery, S
Gaidot, A
Ganzhur, SF
Giraud, PF
de Monchenault, GH
Kozanecki, W
Langer, M
Legendre, M
London, GW
Mayer, B
Schott, G
Vasseur, G
Yeche, C
Zito, M
Purohit, MV
Weidemann, AW
Yumiceva, FX
Aston, D
Bartoldus, R
Berger, N
Boyarski, AM
Buchmueller, OL
Convery, MR
Cristinziani, M
De Nardo, G
Dong, D
Dorfan, J
Dujmic, D
Dunwoodie, W
Elsen, EE
Field, RC
Glanzman, T
Gowdy, SJ
Hadig, T
Halyo, V
Hryn'ova, T
Innes, WR
Kelsey, MH
Kim, P
Kocian, ML
Leith, DWGS
Libby, J
Luitz, S
Luth, V
Lynch, HL
Marsiske, H
Messner, R
Muller, DR
O'Grady, CP
Ozcan, VE
Perazzo, A
Perl, M
Petrak, S
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Simi, G
Snyder, A
Soha, A
Stelzer, J
Su, D
Sullivan, MK
Va'vra, J
Wagner, SR
Weaver, M
Weinstein, AJR
Wisniewski, WJ
Wittgen, M
Wright, DH
Young, CC
Burchat, PR
Edwards, AJ
Meyer, TI
Petersen, BA
Roat, C
Ahmed, S
Alam, MS
Ernst, JA
Saeed, MA
Saleem, M
Wappler, FR
Bugg, W
Krishnamurthy, M
Spanier, SM
Eckmann, R
Kim, H
Ritchie, JL
Satpathy, A
Schwitters, RF
Izen, JM
Kitayama, I
Lou, XC
Ye, S
Bianchi, F
Bona, M
Gallo, F
Gamba, D
Borean, C
Bosisio, L
Cossutti, F
Della Ricca, G
Dittongo, S
Grancagnolo, S
Lanceri, L
Poropat, P
Vitale, L
Vuagnin, G
Panvini, RS
Banerjee, S
Brown, CM
Fortin, D
Jackson, PD
Kowalewski, R
Roney, JM
Band, HR
Dasu, S
Datta, M
Eichenbaum, AM
Hollar, JJ
Johnson, JR
Kutter, PE
Li, H
Liu, R
Di Lodovico, F
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Sekula, SJ
Tan, P
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Neal, H
AF Aubert, B
Barate, R
Boutigny, D
Couderc, F
Gaillard, JM
Hicheur, A
Karyotakis, Y
Lees, JP
Tisserand, V
Zghiche, A
Palano, A
Pompili, A
Chen, JC
Qi, ND
Rong, G
Wang, P
Zhu, YS
Eigen, G
Ofte, I
Stugu, B
Abrams, GS
Borgland, AW
Breon, AB
Brown, DN
Button-Shafer, J
Cahn, RN
Charles, E
Day, CT
Gill, MS
Gritsan, AV
Groysman, Y
Jacobsen, RG
Kadel, RW
Kadyk, J
Kerth, LT
Kolomensky, YG
Kukartsev, G
LeClerc, C
Levi, ME
Lynch, G
Mir, LM
Oddone, PJ
Orimoto, TJ
Pripstein, M
Roe, NA
Ronan, MT
Shelkov, VG
Telnov, AV
Wenzel, WA
Ford, K
Harrison, TJ
Hawkes, CM
Morgan, SE
Watson, AT
Watson, NK
Fritsch, M
Goetzen, K
Held, T
Koch, H
Lewandowski, B
Pelizaeus, M
Steinke, M
Boyd, JT
Chevalier, N
Cottingham, WN
Kelly, MP
Latham, TE
Wilson, FF
Abe, K
Cuhadar-Donszelmann, T
Hearty, C
Mattison, TS
McKenna, JA
Thiessen, D
Kyberd, P
Teodorescu, L
Blinov, VE
Bukin, AD
Druzhinin, VP
Golubev, VB
Ivanchenko, VN
Kravchenko, EA
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Yushkov, AN
Best, D
Bruinsma, M
Chao, M
Eschrich, I
Kirkby, D
Lankford, AJ
Mandelkern, M
Mommsen, RK
Roethel, W
Stoker, DP
Buchanan, C
Hartfiel, BL
Gary, JW
Shen, BC
Wang, K
del Re, D
Hadavand, HK
Hill, EJ
MacFarlane, DB
Paar, HP
Rahatlou, S
Sharma, V
Berryhill, JW
Campagnari, C
Dahmes, B
Levy, SL
Long, O
Lu, A
Mazur, MA
Richman, JD
Verkerke, W
Beck, TW
Eisner, AM
Heusch, CA
Lockman, WS
Schalk, T
Schmitz, RE
Schumm, BA
Seiden, A
Spradlin, P
Williams, DC
Wilson, MG
Albert, J
Chen, E
Dubois-Felsmann, GP
Dvoretskii, A
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Ryd, A
Samuel, A
Yang, S
Jayatilleke, S
Mancinelli, G
Meadows, BT
Sokoloff, MD
Abe, T
Blanc, F
Bloom, P
Chen, S
Clark, PJ
Ford, WT
Nauenberg, U
Olivas, A
Rankin, P
Smith, JG
van Hoek, WC
Zhang, L
Harton, JL
Hu, T
Soffer, A
Toki, WH
Wilson, RJ
Altenburg, D
Brandt, T
Brose, J
Colberg, T
Dickopp, M
Feltresi, E
Hauke, A
Lacker, HM
Maly, E
Muller-Pfefferkorn, R
Nogowski, R
Otto, S
Schubert, J
Schubert, KR
Schwierz, R
Spaan, B
Bernard, D
Bonneaud, GR
Brochard, F
Grenier, P
Thiebaux, C
Vasileiadis, G
Verderi, M
Bard, DJ
Khan, A
Lavin, D
Muheim, F
Playfer, S
Andreotti, M
Azzolini, V
Bettoni, D
Bozzi, C
Calabrese, R
Cibinetto, G
Luppi, E
Negrini, M
Sarti, A
Treadwell, E
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Finocchiaro, G
Patteri, P
Piccolo, M
Zallo, A
Buzzo, A
Capra, R
Contri, R
Crosetti, G
Lo Vetere, M
Macri, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Bailey, S
Brandenburg, G
Morii, M
Won, E
Dubitzky, RS
Langenegger, U
Bhimji, W
Bowerman, DA
Dauncey, PD
Egede, U
Gaillard, JR
Morton, GW
Nash, JA
Taylor, GP
Grenier, GJ
Lee, SJ
Mallik, U
Cochran, J
Crawley, HB
Lamsa, J
Meyer, WT
Prell, S
Rosenberg, EI
Yi, J
Davier, M
Grosdidier, G
Hocker, A
Laplace, S
Le Diberder, F
Lepeltier, V
Lutz, AM
Petersen, TC
Plaszczynski, S
Schune, MH
Tantot, L
Wormser, G
Cheng, CH
Lange, DJ
Simani, MC
Wright, DM
Bevan, AJ
Coleman, JP
Fry, JR
Gabathuler, E
Gamet, R
Kay, M
Parry, RJ
Payne, DJ
Sloane, RJ
Touramanis, C
Back, JJ
Harrison, PF
Mohanty, GB
Brown, CL
Cowan, G
Flack, RL
Flaecher, HU
George, S
Green, MG
Kurup, A
Marker, CE
McMahon, TR
Ricciardi, S
Salvatore, F
Vaitsas, G
Winter, MA
Brown, D
Davis, CL
Allison, J
Barlow, NR
Barlow, RJ
Hart, PA
Hodgkinson, MC
Lafferty, GD
Lyon, AJ
Williams, JC
Farbin, A
Hulsbergen, WD
Jawahery, A
Kovalskyi, D
Lae, CK
Lillard, V
Roberts, DA
Blaylock, G
Dallapiccola, C
Flood, KT
Hertzbach, SS
Kofler, R
Koptchev, VB
Moore, TB
Saremi, S
Staengle, H
Willocq, S
Cowan, R
Sciolla, G
Taylor, F
Yamamoto, RK
Mangeol, DJJ
Patel, PM
Robertson, SH
Lazzaro, A
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Reidy, J
Sanders, DA
Summers, DJ
Zhao, HW
Brunet, S
Cote, D
Taras, P
Nicholson, H
Cartaro, C
Cavallo, N
Fabozzi, F
Gatto, C
Lista, L
Monorchio, D
Paolucci, P
Piccolo, D
Sciacca, C
Baak, M
Raven, G
Wilden, L
Jessop, CP
LoSecco, JM
Gabriel, TA
Allmendinger, T
Brau, B
Gan, KK
Honscheid, K
Hufnagel, D
Kagan, H
Kass, R
Pulliam, T
Ter-Antonyan, R
Wong, QK
Brau, J
Frey, R
Igonkina, O
Potter, CT
Sinev, NB
Strom, D
Torrence, E
Colecchia, F
Dorigo, A
Galeazzi, F
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Tiozzo, G
Voci, C
Benayoun, M
Briand, H
Chauveau, J
David, P
de la Vaissiere, C
Del Buono, L
Hamon, O
John, MJJ
Leruste, P
Ocariz, J
Pivk, M
Roos, L
T'Jampens, S
Therin, G
Manfredi, PF
Re, V
Behera, PK
Gladney, L
Guo, QH
Panetta, J
Anulli, F
Biasini, M
Peruzzi, IM
Pioppi, M
Angelini, C
Batignani, G
Bettarini, S
Bondioli, M
Bucci, F
Calderini, G
Carpinelli, M
Del Gamba, V
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Martinez-Vidal, F
Morganti, M
Neri, N
Paoloni, E
Rama, M
Rizzo, G
Sandrelli, F
Walsh, J
Haire, M
Judd, D
Paick, K
Wagoner, DE
Danielson, N
Elmer, P
Lu, C
Miftakov, V
Olsen, J
Smith, AJS
Varnes, EW
Bellini, F
Cavoto, G
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Li Gioi, L
Mazzoni, MA
Morganti, S
Pierini, M
Piredda, G
Tehrani, FS
Voena, C
Christ, S
Wagner, G
Waldi, R
Adye, T
De Groot, N
Franek, B
Geddes, NI
Gopal, GP
Olaiya, EO
Xella, SM
Aleksan, R
Emery, S
Gaidot, A
Ganzhur, SF
Giraud, PF
de Monchenault, GH
Kozanecki, W
Langer, M
Legendre, M
London, GW
Mayer, B
Schott, G
Vasseur, G
Yeche, C
Zito, M
Purohit, MV
Weidemann, AW
Yumiceva, FX
Aston, D
Bartoldus, R
Berger, N
Boyarski, AM
Buchmueller, OL
Convery, MR
Cristinziani, M
De Nardo, G
Dong, D
Dorfan, J
Dujmic, D
Dunwoodie, W
Elsen, EE
Field, RC
Glanzman, T
Gowdy, SJ
Hadig, T
Halyo, V
Hryn'ova, T
Innes, WR
Kelsey, MH
Kim, P
Kocian, ML
Leith, DWGS
Libby, J
Luitz, S
Luth, V
Lynch, HL
Marsiske, H
Messner, R
Muller, DR
O'Grady, CP
Ozcan, VE
Perazzo, A
Perl, M
Petrak, S
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Simi, G
Snyder, A
Soha, A
Stelzer, J
Su, D
Sullivan, MK
Va'vra, J
Wagner, SR
Weaver, M
Weinstein, AJR
Wisniewski, WJ
Wittgen, M
Wright, DH
Young, CC
Burchat, PR
Edwards, AJ
Meyer, TI
Petersen, BA
Roat, C
Ahmed, S
Alam, MS
Ernst, JA
Saeed, MA
Saleem, M
Wappler, FR
Bugg, W
Krishnamurthy, M
Spanier, SM
Eckmann, R
Kim, H
Ritchie, JL
Satpathy, A
Schwitters, RF
Izen, JM
Kitayama, I
Lou, XC
Ye, S
Bianchi, F
Bona, M
Gallo, F
Gamba, D
Borean, C
Bosisio, L
Cossutti, F
Della Ricca, G
Dittongo, S
Grancagnolo, S
Lanceri, L
Poropat, P
Vitale, L
Vuagnin, G
Panvini, RS
Banerjee, S
Brown, CM
Fortin, D
Jackson, PD
Kowalewski, R
Roney, JM
Band, HR
Dasu, S
Datta, M
Eichenbaum, AM
Hollar, JJ
Johnson, JR
Kutter, PE
Li, H
Liu, R
Di Lodovico, F
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Sekula, SJ
Tan, P
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Neal, H
CA BABAR Collaboration
TI Study of B-+/--> J/psi pi(+/-) and B-+/--> J/psi K +/- decays:
Measurement of the ratio of branching fractions and search for direct CP
violation
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
AB We study B+/--->J/psipi(+/-) and B+/--->J/psiK(+/-) decays in a sample of about 89x10(6) B (B) over bar pairs collected with the BABAR detector at the PEP-II asymmetric B factory at SLAC. We observe a signal of 244+/-20 B+/--->J/psipi(+/-) events and determine the ratio B(B+/--->J/psipi(+/-))/B(B+/--->J/psiK(+/-)) to be [5.37+/-0.45(stat)+/-0.11(syst)]%. The charge asymmetries for the B+/--->J/psipi(+/-) and B+/--->J/psiK(+/-) decays are determined to be A(pi)=0.123+/-0.085(stat)+/-0.004(syst) and A(K)=0.030+/-0.015(stat)+/-0.006(syst), respectively.
C1 Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France.
Univ Bari, Dipartimento Fis, I-70126 Bari, Italy.
Ist Nazl Fis Nucl, I-70126 Bari, Italy.
Inst High Energy Phys, Beijing 100039, Peoples R China.
Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany.
Univ Bristol, Bristol BS8 1TL, Avon, England.
Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
Brunel Univ, Uxbridge UB8 3PH, Middx, England.
Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
Univ Calif Irvine, Irvine, CA 92697 USA.
Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
Univ Calif Riverside, Riverside, CA 92521 USA.
Univ Calif San Diego, La Jolla, CA 92093 USA.
Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA.
CALTECH, Pasadena, CA 91125 USA.
Univ Cincinnati, Cincinnati, OH 45221 USA.
Univ Colorado, Boulder, CO 80309 USA.
Colorado State Univ, Ft Collins, CO 80523 USA.
Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
Ecole Polytech, LLR, F-91128 Palaiseau, France.
Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy.
Ist Nazl Fis Nucl, I-44100 Ferrara, Italy.
Florida A&M Univ, Tallahassee, FL 32307 USA.
Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy.
Ist Nazl Fis Nucl, I-16146 Genoa, Italy.
Harvard Univ, Cambridge, MA 02138 USA.
Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany.
Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
Univ Iowa, Iowa City, IA 52242 USA.
Iowa State Univ, Ames, IA 50011 USA.
Lab Accelerateur Lineaire, F-91898 Orsay, France.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Univ Liverpool, Liverpool L69 72E, Merseyside, England.
Univ London, Queen Mary, London E1 4NS, England.
Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England.
Univ Louisville, Louisville, KY 40292 USA.
Univ Manchester, Manchester M13 9PL, Lancs, England.
Univ Maryland, College Pk, MD 20742 USA.
Univ Massachusetts, Amherst, MA 01003 USA.
MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
McGill Univ, Montreal, PQ H3A 2T8, Canada.
Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
Ist Nazl Fis Nucl, I-20133 Milan, Italy.
Univ Mississippi, University, MS 38677 USA.
Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada.
Mt Holyoke Coll, S Hadley, MA 01075 USA.
Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy.
Ist Nazl Fis Nucl, I-80126 Naples, Italy.
NIKHEF, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands.
Univ Notre Dame, Notre Dame, IN 46556 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
Ohio State Univ, Columbus, OH 43210 USA.
Univ Oregon, Eugene, OR 97403 USA.
Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
Ist Nazl Fis Nucl, I-35131 Padua, Italy.
Univ Paris 06, Lab Phys Nucl HE, F-75252 Paris, France.
Univ Paris 07, Lab Phys Nucl HE, F-75252 Paris, France.
Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy.
Ist Nazl Fis Nucl, I-27100 Pavia, Italy.
Univ Penn, Philadelphia, PA 19104 USA.
Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
Ist Nazl Fis Nucl, I-06100 Perugia, Italy.
Univ Pisa, Scuola Normale Super Pisa, Dipartimento Fis, I-56127 Pisa, Italy.
Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
Prairie View A&M Univ, Prairie View, TX 77446 USA.
Princeton Univ, Princeton, NJ 08544 USA.
Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
Ist Nazl Fis Nucl, I-00185 Rome, Italy.
Univ Rostock, D-18051 Rostock, Germany.
Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France.
Univ S Carolina, Columbia, SC 29208 USA.
Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
Stanford Univ, Stanford, CA 94305 USA.
SUNY Albany, Albany, NY 12222 USA.
Univ Tennessee, Knoxville, TN 37996 USA.
Univ Texas, Austin, TX 78712 USA.
Univ Texas, Richardson, TX 75083 USA.
Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
Ist Nazl Fis Nucl, I-10125 Turin, Italy.
Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
Ist Nazl Fis Nucl, I-34127 Trieste, Italy.
Vanderbilt Univ, Nashville, TN 37235 USA.
Univ Victoria, Victoria, BC V8W 3P6, Canada.
Univ Wisconsin, Madison, WI 53706 USA.
Yale Univ, New Haven, CT 06511 USA.
Univ Basilicata, I-85100 Potenza, Italy.
Univ Valencia, CSIC, Inst Fis Corpuscular, IFIC, Valencia, Spain.
RP Aubert, B (reprint author), Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France.
RI Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016;
Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Monge,
Maria Roberta/G-9127-2012; Luppi, Eleonora/A-4902-2015; Kravchenko,
Evgeniy/F-5457-2015; Calabrese, Roberto/G-4405-2015; Mir,
Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky,
Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Grancagnolo,
Sergio/J-3957-2015; Lusiani, Alberto/N-2976-2015; Morandin,
Mauro/A-3308-2016; Lusiani, Alberto/A-3329-2016; de Groot,
Nicolo/A-2675-2009; Sarti, Alessio/I-2833-2012; Lista, Luca/C-5719-2008;
Bellini, Fabio/D-1055-2009; crosetti, nanni/H-3040-2011; Cavallo,
Nicola/F-8913-2012; Saeed, Mohammad Alam/J-7455-2012; Negrini,
Matteo/C-8906-2014; Neri, Nicola/G-3991-2012; Forti,
Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani,
Claudia/C-5223-2009; de Sangro, Riccardo/J-2901-2012
OI Della Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico,
Francesca/0000-0003-3952-2175; Calcaterra,
Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636;
Monge, Maria Roberta/0000-0003-1633-3195; Luppi,
Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400;
Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal,
F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere,
Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304;
Lusiani, Alberto/0000-0002-6876-3288; Morandin,
Mauro/0000-0003-4708-4240; Lusiani, Alberto/0000-0002-6876-3288; Sarti,
Alessio/0000-0001-5419-7951; Bellini, Fabio/0000-0002-2936-660X; Saeed,
Mohammad Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963;
Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965;
Rotondo, Marcello/0000-0001-5704-6163; Patrignani,
Claudia/0000-0002-5882-1747; de Sangro, Riccardo/0000-0002-3808-5455
NR 11
TC 0
Z9 0
U1 0
U2 3
PU AMERICAN 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 JUN 18
PY 2004
VL 92
IS 24
AR 241802
DI 10.1103/PhysRevLett.92.241802
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 830HO
UT WOS:000222112900005
ER
PT J
AU Batista, CD
Aligia, AA
AF Batista, CD
Aligia, AA
TI Exact bond ordered ground state for the transition between the band and
the Mott insulator
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID STRONG ELECTRON CORRELATION; IONIC TRANSITION; HUBBARD-MODEL; VERTEX
MODELS; ONE-DIMENSION; CHAIN; PHASE
AB We derive an effective Hamiltonian H-eff for an ionic Hubbard chain, valid for t<>t) and the Mott insulator (MI) (U-Delta>>t). Using spin-particle transformations [Phys. Rev. Lett. 86, 1082 (2001)], we map H-eff(U=Delta) into an SU(3) antiferromagnetic Heisenberg model whose exact ground state is known. In this way, we show rigorously that a spontaneously dimerized insulating ferroelectric phase appears in the transition region between the BI and the MI.
C1 Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina.
Comis Nacl Energia Atom, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina.
RP Batista, CD (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
NR 25
TC 43
Z9 43
U1 1
U2 6
PU AMERICAN 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 JUN 18
PY 2004
VL 92
IS 24
AR 246405
DI 10.1103/PhysRevLett.92.246405
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 830HO
UT WOS:000222112900046
PM 15245117
ER
PT J
AU Daruka, I
Hamilton, JC
AF Daruka, I
Hamilton, JC
TI Atomistic and lattice model of a grain boundary defaceting phase
transition
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID CRYSTAL SHAPES; ALUMINUM
AB Recent calculations have shown that grain boundary (GB) stress is too small to stabilize finite GB facets, suggesting that the existing theory of GB defaceting phase transitions is incomplete. We perform molecular dynamics calculations, which show a reversible phase transition at similar to400 K with a concerted shuffle of two atoms at the facet junction as the elementary excitation. Based on this excitation we formulate an appropriate lattice model, perform Monte Carlo simulations, and establish an analytical relationship between the elementary excitation energy and the transition temperature.
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Univ Debrecen, Dept Theoret Phys, POB 5, H-4010 Debrecen, Hungary.
NR 19
TC 8
Z9 8
U1 2
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 JUN 18
PY 2004
VL 92
IS 24
AR 246105
DI 10.1103/PhysRevLett.92.246105
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 830HO
UT WOS:000222112900039
PM 15245110
ER
PT J
AU Dawson, S
Dicus, D
Kao, C
Malhotra, R
AF Dawson, S
Dicus, D
Kao, C
Malhotra, R
TI Discovering the Higgs bosons of minimal supersymmetry with muons and a
bottom quark
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID STANDARD MODEL; HADRON SUPERCOLLIDERS; LOCAL SUPERSYMMETRY;
CROSS-SECTION; SUPERGRAVITY; COLLIDER; PHYSICS; DECAYS; SEARCH; PAIRS
AB We investigate the prospects for the discovery at the CERN Large Hadron Collider (LHC) of a neutral Higgs boson produced with one bottom quark followed by Higgs decay into a muon pair. We work within the framework of the minimal supersymmetric model. The dominant physics background from the production of bmu(+)mu(-), jmu(+)mu(-), j=g,u,d,s,c, and b (b) over barW(+)W(-) is calculated with realistic acceptance cuts. Promising results are found for the CP-odd pseudoscalar (A(0)) and the heavier CP-even scalar (H-0) Higgs bosons with masses up to 600 GeV. This discovery channel with one energetic bottom quark greatly improves the discovery potential of the LHC beyond the inclusive channel pp-->phi(0)-->mu(+)mu(-)+X.
C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
Univ Texas, Ctr Particle Phys, Austin, TX 78712 USA.
Univ Oklahoma, Dept Phys & Astron, Norman, OK 73019 USA.
CERN, Div Theoret Phys, CH-1211 Geneva 23, Switzerland.
RP Dawson, S (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
NR 42
TC 15
Z9 15
U1 0
U2 0
PU AMERICAN 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 JUN 18
PY 2004
VL 92
IS 24
AR 241801
DI 10.1103/PhysRevLett.92.241801
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 830HO
UT WOS:000222112900004
PM 15245075
ER
PT J
AU Hasan, MZ
Chuang, YD
Qian, D
Li, YW
Kong, Y
Kuprin, A
Fedorov, AV
Kimmerling, R
Rotenberg, E
Rossnagel, K
Hussain, Z
Koh, H
Rogado, NS
Foo, ML
Cava, RJ
AF Hasan, MZ
Chuang, YD
Qian, D
Li, YW
Kong, Y
Kuprin, A
Fedorov, AV
Kimmerling, R
Rotenberg, E
Rossnagel, K
Hussain, Z
Koh, H
Rogado, NS
Foo, ML
Cava, RJ
TI Fermi surface and quasiparticle dynamics of Na0.7CoO2 investigated by
angle-resolved photoemission spectroscopy
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ELECTRONIC-STRUCTURE; SINGLE-CRYSTALS; SUPERCONDUCTIVITY; NACO2O4
AB We present the first angle-resolved photoemission study of Na0.7CoO2, the host material of the superconducting NaxCoO2.nH(2)O series. Our results show a hole-type Fermi surface, a strongly renormalized quasiparticle band, a small Fermi velocity, and a large Hubbard U. The quasiparticle band crosses the Fermi level from M toward Gamma suggesting a negative sign of effective single-particle hopping t(eff) (about 10 meV) which is on the order of magnetic exchange coupling J in this system. Quasiparticles are well defined only in the T-linear resistivity (non-Fermi-liquid) regime. Unusually small single-particle hopping and unconventional quasiparticle dynamics may have implications for understanding the phase of matter realized in this new class of a strongly interacting quantum system.
C1 Princeton Univ, Joseph Henry Labs, Dept Phys, Princeton, NJ 08544 USA.
Princeton Mat Inst, Princeton Ctr Complex Mat, Princeton, NJ 08544 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
Princeton Univ, Dept Chem, Princeton, NJ 08544 USA.
RP Hasan, MZ (reprint author), Princeton Univ, Joseph Henry Labs, Dept Phys, Princeton, NJ 08544 USA.
EM mzhasan@Princeton.edu
RI Rotenberg, Eli/B-3700-2009; Rossnagel, Kai/F-8822-2011; HASAN, M.
Zahid/D-8237-2012; Foo, Maw Lin/H-9273-2012; Qian, Dong/O-1028-2015
OI Rotenberg, Eli/0000-0002-3979-8844; Rossnagel, Kai/0000-0001-5107-0090;
NR 29
TC 189
Z9 192
U1 1
U2 27
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 JUN 18
PY 2004
VL 92
IS 24
AR 246402
DI 10.1103/PhysRevLett.92.246402
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 830HO
UT WOS:000222112900043
PM 15245114
ER
PT J
AU Henson, BF
Robinson, JM
AF Henson, BF
Robinson, JM
TI Dependence of quasiliquid thickness on the liquid activity: A bulk
thermodynamic theory of the interface
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID X-RAY-SCATTERING; TRANSITION LAYER; SINGLE-CRYSTALS; NORMAL-ALKANES; ICE
SURFACES; ARGON FILMS; POINT; MELT
AB Studies of the phenomenon of quasiliquid formation span systems as diverse as noble gases, complex organic molecules, and metals, and span triple point temperatures from 25 to 933 K. We show that when viewed as a single phenomenon essentially all published measurements of the quasiliquid layer thickness on solids below the melting point can be plotted as a function of the thermodynamic activity. Two classes of behavior are then observed: one for molecular systems and one for atomic systems. We derive a dependence on activity through a grand canonical lattice gas calculation. This is the only such unifying theory of this phenomenon.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Henson, BF (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
NR 33
TC 23
Z9 23
U1 0
U2 9
PU AMERICAN 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 JUN 18
PY 2004
VL 92
IS 24
AR 246107
DI 10.1103/PhysRevLett.92.246107
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 830HO
UT WOS:000222112900041
PM 15245112
ER
PT J
AU Lapenta, G
AF Lapenta, G
TI Comment on "Solitonlike solutions of the Grad-Shafranov equation" -
Reply
SO PHYSICAL REVIEW LETTERS
LA English
DT Editorial Material
C1 Los Alamos Natl Lab, Div Theoret, Plasma Theory Grp, Los Alamos, NM 87545 USA.
RP Lapenta, G (reprint author), Los Alamos Natl Lab, Div Theoret, Plasma Theory Grp, Los Alamos, NM 87545 USA.
NR 3
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
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUN 18
PY 2004
VL 92
IS 24
AR 249502
DI 10.1103/PhysRevLett.92.249502
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 830HO
UT WOS:000222112900069
ER
PT J
AU Lu, ZP
Liu, CT
Thompson, JR
Porter, WD
AF Lu, ZP
Liu, CT
Thompson, JR
Porter, WD
TI Structural amorphous steels
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID BULK METALLIC GLASSES; ALLOYS; SYSTEM; CR
AB Recent advancement in bulk metallic glasses, whose properties are usually superior to their crystalline counterparts, has stimulated great interest in fabricating bulk amorphous steels. While a great deal of effort has been devoted to this field, the fabrication of structural amorphous steels with large cross sections has remained an alchemist's dream because of the limited glass-forming ability (GFA) of these materials. Here we report the discovery of structural amorphous steels that can be cast into glasses with large cross-section sizes using conventional drop-casting methods. These new steels showed interesting physical, magnetic, and mechanical properties, along with high thermal stability. The underlying mechanisms for the superior GFA of these materials are discussed.
C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA.
Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA.
Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA.
RP Lu, ZP (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA.
EM luzp@ornl.gov
RI Lu, Zhao-Ping/A-2718-2009
NR 16
TC 400
Z9 425
U1 6
U2 98
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 JUN 18
PY 2004
VL 92
IS 24
AR 245503
DI 10.1103/PhysRevLett.92.245503
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 830HO
UT WOS:000222112900024
PM 15245095
ER
PT J
AU Scholl, A
Liberati, M
Arenholz, E
Ohldag, H
Stohr, J
AF Scholl, A
Liberati, M
Arenholz, E
Ohldag, H
Stohr, J
TI Creation of an antiferromagnetic exchange spring
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID FILMS; BIAS; NIO; FERROMAGNET; ANISOTROPY; BILAYERS; MODEL
AB We present evidence for the creation of an exchange spring in an antiferromagnet due to exchange coupling to a ferromagnet. X-ray magnetic linear dichroism spectroscopy on single crystal Co/NiO(001) shows that a partial domain wall is wound up at the surface of the antiferromagnet when the adjacent ferromagnet is rotated by a magnetic field. We determine the interface exchange stiffness and the antiferromagnetic domain wall energy from the field dependence of the direction of the antiferromagnetic axis, the antiferromagnetic pendant to a ferromagnetic hysteresis loop. The existence of a planar antiferromagnetic domain wall, proven by our measurement, is a key assumption of most exchange bias models.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
INFM, Natl Ctr Nanostruct & Biosyst Surfaces, I-41100 Modena, Italy.
Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
RP Scholl, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RI Scholl, Andreas/K-4876-2012; Ohldag, Hendrik/F-1009-2014
NR 20
TC 98
Z9 99
U1 9
U2 47
PU AMERICAN 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 JUN 18
PY 2004
VL 92
IS 24
AR 247201
DI 10.1103/PhysRevLett.92.247201
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 830HO
UT WOS:000222112900057
PM 15245128
ER
PT J
AU Sheik-Bahae, M
Epstein, RI
AF Sheik-Bahae, M
Epstein, RI
TI Can laser light cool semiconductors?
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DOUBLE HETEROSTRUCTURES; QUANTUM EFFICIENCY; UP-CONVERSION; ABSORPTION;
RECOMBINATION
AB Laser cooling in semiconductors is theoretically investigated including arbitrary external efficiency and photon recycling. Experimental conditions needed to attain net cooling in GaAs are derived.
C1 Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Sheik-Bahae, M (reprint author), Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA.
NR 20
TC 101
Z9 103
U1 3
U2 24
PU AMERICAN 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 JUN 18
PY 2004
VL 92
IS 24
AR 247403
DI 10.1103/PhysRevLett.92.247403
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 830HO
UT WOS:000222112900060
PM 15245131
ER
PT J
AU Yang, HB
Wang, SC
Sekharan, AKP
Matsui, H
Souma, S
Sato, T
Takahashi, T
Takeuchi, T
Campuzano, JC
Jin, R
Sales, BC
Mandrus, D
Wang, Z
Ding, H
AF Yang, HB
Wang, SC
Sekharan, AKP
Matsui, H
Souma, S
Sato, T
Takahashi, T
Takeuchi, T
Campuzano, JC
Jin, R
Sales, BC
Mandrus, D
Wang, Z
Ding, H
TI ARPES on Na0.6CoO2: Fermi surface and unusual band dispersion
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SUPERCONDUCTIVITY; NACO2O4
AB The electronic structure of single crystals Na0.6CoO2, which are closely related to the superconducting Na0.3CoO2.yH(2)O (T(c)similar to5 K), is studied by angle-resolved photoelectron spectroscopy. While the measured Fermi surface (FS) is consistent with the large FS enclosing the Gamma point from the band theory, the predicted small FS pockets near the K points are absent. In addition, the band dispersion is found to be highly renormalized, and anisotropic along the two principal axes (Gamma-K, Gamma-M). Our measurements also indicate that an extended flatband is formed slightly above E-F along Gamma-K.
C1 Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA.
Tohoku Univ, Dept Phys, Sendi 9808578, Japan.
Nagoya Univ, Res Ctr Adv Waste & Emiss Management, Nagoya, Aichi, Japan.
Univ Illinois, Dept Phys, Chicago, IL 60607 USA.
Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA.
RP Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA.
RI Takahashi, Takashi/E-5080-2010; Sato, Takafumi/E-5094-2010; souma,
seigo/A-4858-2010; Wang, Shancai/F-6162-2013; Mandrus, David/H-3090-2014
NR 19
TC 128
Z9 129
U1 2
U2 24
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 JUN 18
PY 2004
VL 92
IS 24
AR 246403
DI 10.1103/PhysRevLett.92.246403
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 830HO
UT WOS:000222112900044
PM 15245115
ER
PT J
AU Matamala, R
Gonzalez-Meler, MA
Jastrow, JD
Norby, RJ
Schlesinger, WH
AF Matamala, R
Gonzalez-Meler, MA
Jastrow, JD
Norby, RJ
Schlesinger, WH
TI Response to comment on "Impacts of fine root turnover on forest NPP and
soil C sequestration potential"
SO SCIENCE
LA English
DT Editorial Material
C1 Argonne Natl Lab, Div Environm Res, Argonne, IL 60439 USA.
Univ Illinois, Dept Biol Sci, Chicago, IL 60607 USA.
Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
Duke Univ, Nicholas Sch Environm & Earth Sci, Durham, NC 27708 USA.
RP Matamala, R (reprint author), Argonne Natl Lab, Div Environm Res, Argonne, IL 60439 USA.
EM matamala@anl.gov
RI Norby, Richard/C-1773-2012
OI Norby, Richard/0000-0002-0238-9828
NR 5
TC 0
Z9 0
U1 0
U2 12
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 JUN 18
PY 2004
VL 304
IS 5678
PG 1
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 829YU
UT WOS:000222089500024
ER
PT J
AU Roe, HG
de Pater, I
Gibbard, SG
Macintosh, BA
Max, CE
Young, EF
Brown, ME
Bouchez, AH
AF Roe, HG
de Pater, I
Gibbard, SG
Macintosh, BA
Max, CE
Young, EF
Brown, ME
Bouchez, AH
TI A new 1.6-micron map of Titan's surface
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID ADAPTIVE OPTICS; TELESCOPE; CLOUDS
AB We present a new map of Titan's surface obtained in the spectral 'window' at similar to1.6 mm between strong methane absorption. This pre-Cassini view of Titan's surface was created from images obtained using adaptive optics on the W. M. Keck II telescope and is the highest resolution map yet made of Titan's surface. Numerous surface features down to the limits of the spatial resolution (similar to200-300 km) are apparent. No features are easily identifiable in terms of their geologic origin, although several are likely craters.
C1 CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA.
Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA.
Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA.
Univ Calif Santa Cruz, Ctr Adapt Opt, Santa Cruz, CA 95064 USA.
SW Res Inst, Boulder, CO 80302 USA.
WM Keck Observ, Waimea, HI 96743 USA.
RP Roe, HG (reprint author), CALTECH, Div Geol & Planetary Sci, M-S 150-21, Pasadena, CA 91125 USA.
EM hroe@gps.caltech.edu
OI Max, Claire/0000-0003-0682-5436
NR 13
TC 12
Z9 12
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 JUN 17
PY 2004
VL 31
IS 17
AR L17S03
DI 10.1029/2004GL019871
PG 4
WC Geosciences, Multidisciplinary
SC Geology
GA 833GP
UT WOS:000222325300002
ER
PT J
AU Rosso, KM
Smith, DMA
Dupuis, M
AF Rosso, KM
Smith, DMA
Dupuis, M
TI Aspects of aqueous iron and manganese (II/III) self-exchange electron
transfer reactions
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID TRANSITION-METAL-COMPLEXES; ION HYDROLYSIS REACTIONS; TRANSFER
MATRIX-ELEMENTS; GAUSSIAN-BASIS SETS; AB-INITIO; DENSITY; OXIDATION;
KINETICS; ENERGIES; ATOMS
AB Ab initio methods were applied to the calculation of the reorganization energy A and the electronic coupling matrix element V-AB for the outer-sphere Fe(OH2)(6)(II/III) and Mn(OH2)(6)(II/III) self-exchange electron transfer (ET) reactions. For the Fe case, we find an appreciable effect on V-AB depending on whether the minority spin electron occupies the d(xy) orbital or a mixture of d(xz)/d(yz) orbitals in the Fe-II ion. While these two possible nearly isoenergetic electron accepting states alter the magnitude and distance dependence of V-AB, they do not affect the internal reorganization energy lambda(1) to any significant level. The magnitude and distance dependence of V-AB are found to be strongly dependent on encounter orientation, as expected. V-AB values for corner-to-corner encounter orientations are substantially larger at any given ET distance considered than those for face-to-face encounter orientations. Values of the decay parameter beta are in good agreement with well-accepted values. The adiabaticity criterion is tied to orientation and distance dependence of V-AB.
C1 Pacific NW Natl Lab, Richland, WA 99352 USA.
Whitman Coll, Dept Phys, Walla Walla, WA 99362 USA.
RP Rosso, KM (reprint author), Pacific NW Natl Lab, POB 999,K8-96, Richland, WA 99352 USA.
EM kevin.rosso@pnl.gov
NR 51
TC 19
Z9 19
U1 1
U2 15
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 JUN 17
PY 2004
VL 108
IS 24
BP 5242
EP 5248
DI 10.1021/jp037470a
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 828HV
UT WOS:000221965300016
ER
PT J
AU Bowman, GD
O'Donnell, M
Kuriyan, J
AF Bowman, GD
O'Donnell, M
Kuriyan, J
TI Structural analysis of a eukaryotic sliding DNA clamp-clamp loader
complex
SO NATURE
LA English
DT Article
ID CELL NUCLEAR ANTIGEN; POLYMERASE-III HOLOENZYME; REPLICATION FACTOR-C;
CRYSTAL-STRUCTURE; ACCESSORY PROTEINS; HELICASE-PRIMASE; GAMMA COMPLEX;
MECHANISM; DOMAIN; SUBUNIT
AB Sliding clamps are ring-shaped proteins that encircle DNA and confer high processivity on DNA polymerases. Here we report the crystal structure of the five-protein clamp loader complex ( replication factor-C, RFC) of the yeast Saccharomyces cerevisiae, bound to the sliding clamp ( proliferating cell nuclear antigen, PCNA). Tight interfacial coordination of the ATP analogue ATP-gamma S by RFC results in a spiral arrangement of the ATPase domains of the clamp loader above the PCNA ring. Placement of a model for primed DNA within the central hole of PCNA reveals a striking correspondence between the RFC spiral and the grooves of the DNA double helix. This model, in which the clamp loader complex locks onto primed DNA in a screw-cap-like arrangement, provides a simple explanation for the process by which the engagement of primer-template junctions by the RFC: PCNA complex results in ATP hydrolysis and release of the sliding clamp on DNA.
C1 Univ Calif Berkeley, Howard Hughes Med Inst, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
Rockefeller Univ, Howard Hughes Med Inst, Lab DNA Replicat, New York, NY 10021 USA.
RP Kuriyan, J (reprint author), Univ Calif Berkeley, Howard Hughes Med Inst, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
EM kuriyan@berkeley.edu
FU NIGMS NIH HHS [F32 GM066586, F32 GM066586-01, F32 GM066586-02]
NR 49
TC 254
Z9 266
U1 2
U2 18
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
J9 NATURE
JI Nature
PD JUN 17
PY 2004
VL 429
IS 6993
BP 724
EP 730
DI 10.1038/nature02585
PG 7
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 829OS
UT WOS:000222059900029
PM 15201901
ER
PT J
AU Riebe, M
Haffner, H
Roos, CF
Hansel, W
Benhelm, J
Lancaster, GPT
Korber, TW
Becher, C
Schmidt-Kaler, F
James, DFV
Blatt, R
AF Riebe, M
Haffner, H
Roos, CF
Hansel, W
Benhelm, J
Lancaster, GPT
Korber, TW
Becher, C
Schmidt-Kaler, F
James, DFV
Blatt, R
TI Deterministic quantum teleportation with atoms
SO NATURE
LA English
DT Article
ID PODOLSKY-ROSEN CHANNELS; COMPUTER; STATE
AB Teleportation of a quantum state encompasses the complete transfer of information from one particle to another. The complete specification of the quantum state of a system generally requires an infinite amount of information, even for simple two-level systems (qubits). Moreover, the principles of quantum mechanics dictate that any measurement on a system immediately alters its state, while yielding at most one bit of information. The transfer of a state from one system to another ( by performing measurements on the first and operations on the second) might therefore appear impossible. However, it has been shown(1) that the entangling properties of quantum mechanics, in combination with classical communication, allow quantum-state teleportation to be performed. Teleportation using pairs of entangled photons has been demonstrated(2-6), but such techniques are probabilistic, requiring post-selection of measured photons. Here, we report deterministic quantum-state teleportation between a pair of trapped calcium ions. Following closely the original proposal(1), we create a highly entangled pair of ions and perform a complete Bell-state measurement involving one ion from this pair and a third source ion. State reconstruction conditioned on this measurement is then performed on the other half of the entangled pair. The measured fidelity is 75%, demonstrating unequivocally the quantum nature of the process.
C1 Univ Innsbruck, Inst Expt Phys, A-6020 Innsbruck, Austria.
Los Alamos Natl Lab, Div Theoret T 4, Los Alamos, NM 87545 USA.
Austrian Acad Sci, Inst Quantenopt & Quanteninformat, A-6020 Innsbruck, Austria.
RP Blatt, R (reprint author), Univ Innsbruck, Inst Expt Phys, Tech Str 25, A-6020 Innsbruck, Austria.
EM Rainer.Blatt@uibk.ac.at
RI Roos, Christian/D-8475-2011; Haeffner, Hartmut/D-8046-2012; James,
Daniel/B-9805-2009; Schmidt-Kaler, Ferdinand/E-2151-2017;
OI Roos, Christian/0000-0001-7121-8259; Haeffner,
Hartmut/0000-0002-5113-9622; James, Daniel/0000-0003-3981-4602; Becher,
Christoph/0000-0003-4645-6882
NR 18
TC 563
Z9 582
U1 4
U2 46
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
J9 NATURE
JI Nature
PD JUN 17
PY 2004
VL 429
IS 6993
BP 734
EP 737
DI 10.1038/nature02570
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 829OS
UT WOS:000222059900031
PM 15201903
ER
PT J
AU Barbieri, J
Chapline, G
AF Barbieri, J
Chapline, G
TI Have nucleon decays already been seen?
SO PHYSICS LETTERS B
LA English
DT Article
ID RELATIVITY
AB Within the framework of the classical theory of general relativity nothing remarkable is expected to happen to an observer failing into a large black hole other than the curious circumstance that after the observer crosses a certain surface, the "event horizon", he can no longer communicate with the outside world. Although this prediction has been widely accepted in the physics community, it is inconsistent with quantum mechanics because it conflicts with the need for a universal time to define Schrodinger's equation. It has been pointed out [Philos. Mag. B 281 (2001) 235, Int. J. Mod. Phys. A 18 (2003) 831] that this inconsistency can be avoided if it is assumed that as the surface where general relativity predicts that the event horizon would be located is approached, the redshift does not actually go to infinity, but instead undergoes a continuous phase transition to a de Sitter phase where the vacuum energy is much larger than the cosmological vacuum energy. Although we do not have a fundamental theory of such a phase transition, many features of quantum phase transitions are universal. This universality allows us to make predictions concerning the behavior of matter as it encounters the quantum critical region that replaces the event horizon. One of these predictions is that the nucleons falling onto the critical surface will decay directly into multi-MeV leptons and gamma rays with a characteristic spectrum. As it happens there are some hints from the spectra of cosmic gamma ray bursts and observations of positrons from the center of our galaxy that this is correct. Published by Elsevier B.V.
C1 NAWC WD, Adv Syst Dev, China Lake, CA 93555 USA.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Barbieri, J (reprint author), NAWC WD, Adv Syst Dev, China Lake, CA 93555 USA.
EM barbierijf@eerthlink.net
NR 13
TC 7
Z9 7
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 JUN 17
PY 2004
VL 590
IS 1-2
BP 8
EP 12
DI 10.1016/j.physletb.2004.03.054
PG 5
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 826LM
UT WOS:000221830600002
ER
PT J
AU Burdman, G
AF Burdman, G
TI Flavor violation in warped extra dimensions and CP asymmetries in B
decays
SO PHYSICS LETTERS B
LA English
DT Article
ID RANDALL-SUNDRUM MODEL; TOPCOLOR; SUPERSYMMETRY; CONDENSATION;
TECHNICOLOR; DYNAMICS; MIXINGS; FIELDS; MASSES
AB We show that CP asymmetries in b --> s hadronic decays are potentially affected by the presence of massive color-octet particles strongly coupled to the third generation quarks. Theories with warped extra dimensions provide natural candidates in the Kaluza-Klein excitations of gluons in scenarios where flavor-breaking by bulk fermion masses results in the localization of fermion wave-functions. Topcolor models, in which a new gauge interaction leads to top-condensation and a large top mass. also result in the presence of these color-octet states with TeV masses. We find that large effects are possible in modes such as B --> phiK(s), B --> eta'K-s and B --> pi(0)K(s) among others. (C) 2004 Published by Elsevier B.V.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA.
RP Burdman, G (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA.
EM gaburdman@lbl.oov
RI Burdman, Gustavo/D-3285-2012
NR 40
TC 66
Z9 66
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 JUN 17
PY 2004
VL 590
IS 1-2
BP 86
EP 94
DI 10.1016/j.physletb.2004.03.055
PG 9
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 826LM
UT WOS:000221830600013
ER
PT J
AU Challacombe, JF
Rechtsteiner, A
Gottardo, R
Rocha, LM
Browne, EP
Shenk, T
Altherr, MR
Brettin, TS
AF Challacombe, JF
Rechtsteiner, A
Gottardo, R
Rocha, LM
Browne, EP
Shenk, T
Altherr, MR
Brettin, TS
TI Evaluation of the host transcriptional response to human cytomegalovirus
infection
SO PHYSIOLOGICAL GENOMICS
LA English
DT Review
DE gene expression analysis; herpesvirus; pathogenesis
ID SINGULAR-VALUE DECOMPOSITION; NF-KAPPA-B; PROTEIN-C RECEPTOR;
GENE-EXPRESSION; IMMUNE-RESPONSES; CELL-CYCLE; OLIGONUCLEOTIDE ARRAYS;
INDUCED APOPTOSIS; BREAST-CANCER; T-LYMPHOCYTES
AB Gene expression data from human cytomegalovirus (HCMV)-infected cells were analyzed using DNA-Chip Analyzer (dChip) followed by singular value decomposition (SVD) and compared with a previous analysis of the same data that employed GeneChip software and a fold change filtering approach. dChip and SVD analysis revealed two clusters of coexpressed human genes responding differently to HCMV infection: one containing some genes identified previously, and another that was largely unique to this analysis. Annotating these genes, we identified several functional categories important to host cell responses to HCMV infection. These categories included genes involved in transcriptional regulation, oncogenesis, and cell cycle regulation, which were more prevalent in cluster 1, and genes involved in immune system regulation, signal transduction, and cell adhesion, which were more prevalent in cluster 2. Within these categories, we found genes involved in the host response to HCMV infection ( mainly in cluster 1), as well as genes targeted by HCMV's immune evasion strategies ( mainly in cluster 2). As the second group of genes identified by the dChip and SVD approach was statistically and biologically significant, our results point out the advantages of using different methods to analyze gene expression data.
C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
Los Alamos Natl Lab, Comp & Computat Sci Div, Los Alamos, NM 87545 USA.
Princeton Univ, Dept Mol Biol, Princeton, NJ 08544 USA.
RP Challacombe, JF (reprint author), Los Alamos Natl Lab, Biosci Div, Mail Stop M888, Los Alamos, NM 87545 USA.
EM jchalla@lanl.gov
OI Rocha, Luis/0000-0001-9402-887X
FU NCI NIH HHS [CA-87661]
NR 101
TC 25
Z9 25
U1 1
U2 4
PU AMER PHYSIOLOGICAL SOC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA
SN 1094-8341
J9 PHYSIOL GENOMICS
JI Physiol. Genomics
PD JUN 17
PY 2004
VL 18
IS 1
BP 51
EP 62
DI 10.1152/physiolgenomics.00155.2003
PG 12
WC Cell Biology; Genetics & Heredity; Physiology
SC Cell Biology; Genetics & Heredity; Physiology
GA 829YT
UT WOS:000222089100007
PM 15069167
ER
PT J
AU Coker, EN
Boyle, TJ
Rodriguez, MA
Alam, TM
AF Coker, EN
Boyle, TJ
Rodriguez, MA
Alam, TM
TI Structurally characterized magnesium carboxylates with tuned melting
points
SO POLYHEDRON
LA English
DT Article
DE magnesium carboxylate; meltable; dispersion processing; thermal
properties
ID PHENOXYALKANOIC ACID INTERACTIONS; DIVALENT METAL-COMPLEXES; X-RAY
STRUCTURES; CRYSTAL-STRUCTURES; MOLECULAR-STRUCTURES; ALKALINE-EARTH;
DIHYDRATE; TETRAHYDRATE; COORDINATION; ARYLOXIDES
AB A novel family of carboxylic acid modified Mg species has been synthesized through the reaction of Mg(OEt)2 with a series of sterically varied carboxylic acids (HORc) where HORc=HO2CMC (HOAc), HO2CCHMe2 (HOPc), HO2CCMe3 (HOBc) and HO2CCH2CMe3 (HONc). The resultant products were isolated as [Mg(OAC)(2)](3)(HOAC)(2)(H2O)(2).2(HOAc) (1), [Mg(OPc)(2)(HOPc](6) (2), Mg(OBc)(2)(HOBC)(4) (3) and [Mg(ONO2(HONc)](6) (4). Compound I is trinuclear wherein the two terminal octahedral (Oh) bound Mg metal centers possess one terminal water, one terminal, one unidentate bridging and two bidentate bridging OAc ligands that symmetrically bind to the central Oh bound Mg cation. The water in 1 is believed to be generated in situ through an esterification process. In contrast, each of the six Mg atoms of 2 or 4 adopt a trigonal bipyramidal geometry by coordinating one terminal and four bidentate bridging ORc ligands that yield a ring (diameter 6.54 Angstrom for 2 and 6.57 Angstrom for 4) of bridging ORc ligands. Compound 3 binds two terminal OBc ligands and four terminal HOBc ligands to yield a monomeric complex with no water present. Standard analytical data were obtained but did not add significant amounts of information concerning the bulk properties of 1-4. Differential scanning calorimetry and thermal analysis indicated the melting point of these species was tunable. (C) 2004 Elsevier Ltd. All rights reserved.
C1 Sandia Natl Labs, Adv Mat Lab, Albuquerque, NM 87106 USA.
RP Coker, EN (reprint author), Sandia Natl Labs, Adv Mat Lab, 1001 Univ Blvd SE, Albuquerque, NM 87106 USA.
EM encoker@sandia.gov; tjboyle@sandia.gov
NR 43
TC 18
Z9 18
U1 0
U2 5
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0277-5387
J9 POLYHEDRON
JI Polyhedron
PD JUN 17
PY 2004
VL 23
IS 10
BP 1739
EP 1747
DI 10.1016/j.poly.2004.04.005
PG 9
WC Chemistry, Inorganic & Nuclear; Crystallography
SC Chemistry; Crystallography
GA 834GL
UT WOS:000222399500009
ER
PT J
AU Schoonover, JR
Marx, R
Nichols, WR
AF Schoonover, JR
Marx, R
Nichols, WR
TI Application of multivariate curve resolution analysis to FTIR kinetics
data
SO VIBRATIONAL SPECTROSCOPY
LA English
DT Article; Proceedings Paper
CT 2nd International Conference on Advanced Vibrational Spectroscopy
CY AUG 24-29, 2003
CL Univ Nottingham, Nottingham, ENGLAND
HO Univ Nottingham
DE multivariate curve resolution; kinetics data; FTIR
ID SPECTROSCOPY; SYSTEM
AB Multivariate curve resolution (MCR) analysis has been utilized to extract spectra-like factors and concentration-related scores from Fourier transform infrared data sets. The infrared data sets are from the curing of a bismaleimide. The data and accompanying analysis are used to identify the curing temperature and the optimum experimental conditions for the curing. The MCR analysis provides a straightforward approach to assessing the data, unravels overlapping bands in the raw data, and assists in gaining insight to the chemistry of the curing of the bismaleimide of Cyanacure. (C) 2004 Elsevier B.V. All rights reserved.
C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
RP Schoonover, JR (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
EM schoons@lanl.gov
NR 14
TC 6
Z9 6
U1 2
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0924-2031
J9 VIB SPECTROSC
JI Vib. Spectrosc.
PD JUN 17
PY 2004
VL 35
IS 1-2
BP 239
EP 245
DI 10.1016/j.vibspec.2004.02.004
PG 7
WC Chemistry, Analytical; Chemistry, Physical; Spectroscopy
SC Chemistry; Spectroscopy
GA 824LX
UT WOS:000221689200038
ER
PT J
AU Wilde, P
Lyons, TW
Quinby-Hunt, MS
AF Wilde, P
Lyons, TW
Quinby-Hunt, MS
TI Organic carbon proxies in black shales: molybdenum
SO CHEMICAL GEOLOGY
LA English
DT Article
DE black shales; chemical proxies; organic carbon; molybdenum; baltica;
avalonia
ID PLATINUM-GROUP ELEMENTS; NORMAL MARINE SHALES; CARIACO BASIN; PYRITE
FORMATION; EUXINIC SEDIMENTS; TRACE-METALS; DEEP-WATER; SULFUR;
GEOCHEMISTRY; IRON
AB Isotopic and elemental proxies are useful for discerning the original compositions of ancient rocks subject to later diagenetic/thermal alteration, low-rank metamorphism, outcrop weathering, etc. Recent work in the Cariaco Basin [Chem. Geol. 195 (2003) 13 1] has shown a high correlation between total organic carbon (TOC) content and Mo normalized to Al in these modem euxinic sediments: microlaminated, dark olive gray, silty clay (0-11.6 kyr BP), %TOC = 1486*(Mo/Al) + 2.8, n = 13, r(2) = 0.52, mean rate of deposition = 36 cm/kyr; distinctly microlaminated, dark olive gray, clayey mud (11.6-14.5 kyr BP), %TOC = 1622*(Mo/Al) + 0.22, n = 15, r(2) = 0.89, mean rate of deposition = 79 cm/kyr.
Here, we use these relationships to estimate the original TOC contents of ancient black shales with overall characteristics similar to those of the modem Cariaco sediments. These "Group IV" black shales as defined by Quinby-Hunt and Wilde [Econ. Geol. 91 (1996) 4] are characterized by relatively high concentrations of V, Mo and Co but low Mn contents. The Cariaco regressions and those from the Carboniferous of Iowa and the Devonian of New York were used to estimate the 'original' TOC contents for Lower Ordovician black shales of the Baltica and Avalonia plates, where C., values were not taken. For individual samples, the Carboniferous regression produced TOC values approximately double that derived from the regression equation of the Cariaco Basin lower anoxic zone. Such variations among the results from the four regressions suggest that there is no universal proxy for TOC using Mo/Al.
These calculated TOC values, however, are consistent with the higher levels of primary production predicted from the paleogeographic settings of these intervals. In general, the Mo proxy for original TOC content, while approximate, works for oxygen-deficient sites of deposition where other proxies for C loss, such as C-org/S-py ratios in normal (oxic) marine shales, do not apply. Estimates of original TOC from Mo content in samples spanning the geologic record, combined with paleogeography and paleoecology, should be useful in estimating pathways of C synthesis and remineralization in ancient oceans and initial hydrocarbon potential of petroleum source rocks. Published by Elsevier B.V.
C1 Pangloss Fdn, Berkeley, CA 94709 USA.
Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
Univ Missouri, Dept Geol Sci, Columbia, MO 65211 USA.
RP Wilde, P (reprint author), Pangloss Fdn, 1735 Highland Pl, Berkeley, CA 94709 USA.
EM pat.wilde.td.57@aya.yale.edu
NR 51
TC 51
Z9 60
U1 1
U2 21
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2541
J9 CHEM GEOL
JI Chem. Geol.
PD JUN 16
PY 2004
VL 206
IS 3-4
BP 167
EP 176
DI 10.1016/j.chemgeo.2003.12.005
PG 10
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 824BZ
UT WOS:000221660300002
ER
PT J
AU Sato, H
Fehler, M
Saito, T
AF Sato, H
Fehler, M
Saito, T
TI Hybrid synthesis of scalar wave envelopes in two-dimensional random
media having rich short-wavelength spectra
SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
LA English
DT Article
DE envelope; scattering; random media; radiative transfer theory;
stochastic approach
ID POWER-LAW SPECTRA; 2D RANDOM-MEDIA; SEISMOGRAM ENVELOPES; INHOMOGENEOUS
LITHOSPHERE; NONISOTROPIC SCATTERING; PARABOLIC APPROXIMATION;
FINITE-DIFFERENCE; OUTGOING WAVES; SHEAR-WAVES; JAPAN
AB Wave trains in high-frequency seismograms of local earthquakes are mostly composed of incoherent waves that are scattered by distributed heterogeneities within the lithosphere. Their phase variations are very complex; however, their wave envelopes are systematic, frequency-dependent, and vary regionally. Stochastic approaches are superior to deterministic wave-theoretical approaches for modeling wave envelopes in random media. The time width of a wavelet is broadened with increasing travel distance mostly because of diffraction caused by the long-wavelength components of random velocity inhomogeneity. The Markov approximation for the parabolic wave equation is effective for the synthesis of envelopes for random media whose spectra are poor in short-wavelength components; however, we have to consider the contribution of large-angle nonisotropic scattering if the random media are rich in short-wavelength inhomogeneities. Multiple nonisotropic scattering can be reliably modeled as isotropic scattering by using an effective isotropic scattering coefficient given by the momentum transfer scattering coefficient, which is a reciprocal of the transport mean free path. It is mostly controlled by the short-wavelength spectra of random media. We propose a hybrid method for the synthesis of whole wave envelopes that uses the envelope derived from the Markov approximation as a propagator in the radiative transfer integral equation for isotropic scattering. The envelopes resulting from the hybrid method agree well with ensemble average envelopes calculated by averaging envelopes from individual finite difference simulations of the wave equation for a suite of random media.
C1 Tohoku Univ, Dept Geophys, Sendai, Miyagi 9808578, Japan.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Sato, H (reprint author), Tohoku Univ, Dept Geophys, Sendai, Miyagi 9808578, Japan.
EM sato@zisin.geophys.tohoku.ac.jp
NR 31
TC 17
Z9 19
U1 0
U2 0
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9313
EI 2169-9356
J9 J GEOPHYS RES-SOL EA
JI J. Geophys. Res.-Solid Earth
PD JUN 16
PY 2004
VL 109
IS B6
AR B06303
DI 10.1029/2003JB002673
PG 11
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 833HA
UT WOS:000222326500001
ER
PT J
AU Bauer, ED
Bobev, S
Thompson, JD
Hundley, MF
Sarrao, JL
Lobos, A
Aligia, AA
AF Bauer, ED
Bobev, S
Thompson, JD
Hundley, MF
Sarrao, JL
Lobos, A
Aligia, AA
TI Intermediate valence behaviour in the new Kondo lattice compound
Yb3Ni5Al19
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID TEMPERATURE-DEPENDENCE; PHYSICAL-PROPERTIES; CRYSTAL-STRUCTURE; YB;
MODEL; CE; PRESSURE; ELECTRON; SYSTEMS; MOMENT
AB The physical properties of single crystals of the Kondo lattice material Yb3Ni5Al19 have been investigated by means of magnetic susceptibility, specific heat, and electrical resistivity measurements. Single-crystal x-ray diffraction measurements indicate that Yb3Ni5Al19 adopts the Gd3Ni5Al19 orthorhombic crystal structure. This compound exhibits intermediate valence behaviour with a characteristic energy scale T-K similar to 500 K. Calculations of chi(T) based on the Anderson impurity model within the non-crossing approximation including crystalline electric field effects are also presented.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina.
Comis Nacl Energia Atom, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina.
RP Bauer, ED (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
RI Bauer, Eric/D-7212-2011; Lobos, Alejandro/I-5904-2013
NR 22
TC 9
Z9 9
U1 1
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD JUN 16
PY 2004
VL 16
IS 23
BP 4025
EP 4032
AR PII S0953-8984(04)75744-6
DI 10.1088/0953-8984/16/23/019
PG 8
WC Physics, Condensed Matter
SC Physics
GA 835KX
UT WOS:000222483000024
ER
PT J
AU Carpick, RW
Sasaki, DY
Marcus, MS
Eriksson, MA
Burns, AR
AF Carpick, RW
Sasaki, DY
Marcus, MS
Eriksson, MA
Burns, AR
TI Polydiacetylene films: a review of recent investigations into
chromogenic transitions and nanomechanical properties
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Review
ID ATOMIC-FORCE MICROSCOPY; LANGMUIR-BLODGETT-FILMS; GAS-WATER INTERFACE;
ELECTRONIC-STRUCTURE; WAVE-GUIDES; SUBSTITUTED POLYDIACETYLENES;
CONJUGATED POLYMERS; PHASE-CONTRAST; CD2+ SALTS; THERMOCHROMISM
AB Polydiacetylenes (PDAs) form a unique class of polymeric materials that couple highly aligned and conjugated backbones with tailorable pendant sidegroups and terminal functionalities. They can be structured in the form of bulk materials, multilayer and monolayer films, polymerized vesicles, and even incorporated into inorganic host matrices to form nanocomposites. The resulting materials exhibit an array of spectacular properties, beginning most notably with dramatic chromogenic transitions that can be activated optically, thermally, chemically, and mechanically. Recent studies have shown that these transitions can even be controlled and observed at the nanometre scale. These transitions have been harnessed for the purpose of chemical and biomolecular sensors, and on a more fundamental level have led to new insights regarding chromogenic phenomena in polymers. Other recent studies have explored how the strong structural anisotropy that these materials possess leads to anisotropic nanomechanical behaviour. These recent advances suggest that PDAs could be considered as a potential component in nanostructured devices due to the large number of tunable properties. In this paper, we provide a succinct review of the latest insights and applications involving PDA. We then focus in more detail on our work concerning ultrathin films, specifically structural properties, mechanochromism, thermochromism, and in-plane mechanical anisotropy of PDA monolayers. Atomic force microscopy (AFM) and fluorescence microscopy confirm that films 1-3 monolayers thick can be organized into highly ordered domains, with the conjugated backbones parallel to the substrate. The number of stable layers is controlled by the head-group functionality. Local mechanical stress applied by AFM and near-field optical probes induces the chromogenic transition in the film at the nanometre scale. The transition involves substantial optical and structural changes in a highly compressed form. Thermochromism is also studied using spectroscopic ellipsometry and fluorescence intensity measurements, and reveals that ultrathin films can reversibly attain an intermediate phase before irreversibly transforming to a final stable state. Further AFM studies also reveal the relation between the highly anisotropic film structure and its nanomechanical properties. In particular, friction at the nanometre scale depends dramatically upon the angle between the polymer backbone and the sliding direction, with the maximum found when sliding perpendicular to the backbones. The observed threefold anisotropy in mechanical dissipation also leads to contrast in the phase response of intermittent-contact AFM, indicating for the first time that in-plane anisotropy of polymeric systems in general can be investigated using this technique.
C1 Univ Wisconsin, Dept Engn Phys, Madison, WI 53704 USA.
Sandia Natl Labs, Biomol Mat & Interfaces Dept, Albuquerque, NM 87185 USA.
Univ Wisconsin, Dept Phys, Madison, WI 53704 USA.
RP Univ Wisconsin, Dept Engn Phys, Madison, WI 53704 USA.
NR 64
TC 146
Z9 146
U1 9
U2 108
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 JUN 16
PY 2004
VL 16
IS 23
BP R679
EP R697
AR PII S0953-8984(04)56933-3
DI 10.1088/0953-8984/16/23/R01
PG 19
WC Physics, Condensed Matter
SC Physics
GA 835KX
UT WOS:000222483000004
ER
PT J
AU Thalji, RK
Ellman, JA
Bergman, RG
AF Thalji, RK
Ellman, JA
Bergman, RG
TI Highly efficient and enantioselective cyclization of aromatic imines via
directed C-H bond activation
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID ASYMMETRIC CONJUGATE ADDITION; CARBON-HYDROGEN BONDS; METAL-COMPLEXES;
ALKYLATION; INSERTION; LIGANDS; OLEFINS; PHOSPHORAMIDITES;
HYDROACYLATION; 4-PENTENALS
C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Ctr New Direct Organ Synth, Berkeley, CA 94720 USA.
Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Ellman, JA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM jellman@uclink.berkeley.edu; bergman@cchem.berkeley.edu
RI Ellman, Jonathan/C-7732-2013
FU NIGMS NIH HHS [GM069559]
NR 28
TC 154
Z9 154
U1 1
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 JUN 16
PY 2004
VL 126
IS 23
BP 7192
EP 7193
DI 10.1021/ja0394986
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA 828HE
UT WOS:000221963600019
PM 15186153
ER
PT J
AU Kohler, N
Fryxell, GE
Zhang, MQ
AF Kohler, N
Fryxell, GE
Zhang, MQ
TI A bifunctional poly(ethylene glycol) silane immobilized on metallic
oxide-based nanoparticles for conjugation with cell targeting agents
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID SELF-ASSEMBLED MONOLAYERS; MAGNETITE NANOPARTICLES; INTRACELLULAR
UPTAKE; FOLATE RECEPTOR; IN-VITRO; PARTICLES; PEG
AB A trifluoroethylester-terminal poly(ethylene glycol) (PEG) silane was synthesized and self-assembled on iron oxide nanoparticles. The nanoparticle system thus prepared has the flexibility to conjugate with cell targeting agents via either carboxylic or amine terminal groups for a number of biomedical applications, including magnetic resonance imaging (MRI) and controlled drug delivery. The trifluoroethylester silane was synthesized by modifying a PEG diacid to form the corresponding bistrifluoroethylester (TFEE), followed by a reaction with 3-aminopropyltriethoxysilane (APS). The APE; coupled with PEG chains confers the stability of PEG self-assembled monolayers (SAMs) and increases the PEG packing density on nanoparticles by establishing hydrogen bonding between the carbonyl and amine groups present within the monolayer structure. The success of the synthesis of the PEG TEFE silane was confirmed with H-1 NMR and Fourier transform infrared spectroscopy (FTIR). The conjugating flexibility of the PEG TEFE was demonstrated with folic acid that had carboxylic acid groups and amine terminal groups, respectively, and was confirmed by FTIR. TEM analysis showed the well-dispersed nanoparticles before and after they were coated with PEG and folic acid.
C1 Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA.
Pacific NW Natl Lab, Div Mat, Richland, WA 99352 USA.
RP Zhang, MQ (reprint author), Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA.
EM mzhang@u.washington.edu
RI Zhang, Miqin/F-5537-2010
OI Zhang, Miqin/0000-0001-8974-1494
FU NCI NIH HHS [N01-CO37122]
NR 23
TC 342
Z9 349
U1 26
U2 217
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 JUN 16
PY 2004
VL 126
IS 23
BP 7206
EP 7211
DI 10.1021/ja049195r
PG 6
WC Chemistry, Multidisciplinary
SC Chemistry
GA 828HE
UT WOS:000221963600023
PM 15186157
ER
PT J
AU Walzer, U
Hendel, R
Baumgardner, J
AF Walzer, U
Hendel, R
Baumgardner, J
TI The effects of a variation of the radial viscosity profile on mantle
evolution
SO TECTONOPHYSICS
LA English
DT Review
DE mantle convection; viscosity profile; melting temperature;
plate-tectonic behavior; evolution of the earth
ID DEPTH-DEPENDENT VISCOSITY; PLATE-BOUNDARY FORMATION; NON-NEWTONIAN
RHEOLOGY; THERMAL-CONDUCTIVITY; PHASE-TRANSITIONS; 2-PHASE MODEL; EARTHS
MANTLE; SHEAR LOCALIZATION; MGSIO3 PEROVSKITE; RAYLEIGH NUMBER
AB The present paper describes a set of numerical experiments on the mantle's thermal evolution with an infinite Prandtl number fluid in a compressible spherical shell heated mainly from within. We used the anelastic liquid approximation with Earth-like material parameters. The usual variable-viscosity approach in mantle-convection models is the assumption of a temperature dependence only. The resulting thermal boundary layers are included in our model also, but an additional viscosity profile of the interior mantle was derived: The Birch-Murnaghan equation was employed to derive the Gruneisen parameter and other physical quantities as a function of depth from observational values provided by PREM. We computed the melting temperature and a new mantle viscosity profile, called eta3, using the Gruneisen parameter, Lindemann's law and some solid-state physics considerations. The new features of eta3 are a high-viscosity transition layer with rather high viscosity gradients at its boundaries, a second low-viscosity layer beginning under the 660-km discontinuity, and a strong viscosity increase in the central parts of the lower mantle. The rheology is Newtonian but it is supplemented by a viscoplastic yield stress, sigma(y). A viscosity-level parameter, r(n), and sigma(y) have been varied. For a medium-sized Rayleigh-number-yield-stress area, eta3 generates a stable, plate-tectonic behavior near the surface and simultaneously thin sheet-like downwellings in the depth. Outside this area, three other types of solution were found. Not only the planforms but also the evolution of the Rayleigh number, the reciprocal Urey number, the Nusselt number, the surface heat flow, etc., have been studied. We repeated this investigation with two very different basic viscosity profiles, etaKL5a and etaKM, of other authors. A comparison reveals that eta3 facilitates the generation of surface plates and thin sheet-like downwellings in the depth considerably more than etaKL5a or even etaKM. The presence of two internal low-viscosity layers is obviously conducive for plateness and thin sheet-like downwellings. For an infinite yield stress, the thin cold sheet-like downwellings are reticularly connected. However, the distribution of the downwellings is more Earth-like if a realistic yield stress is added. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ Jena, Inst Geowissensch, D-07749 Jena, Germany.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Walzer, U (reprint author), Univ Jena, Inst Geowissensch, Burgweg 11, D-07749 Jena, Germany.
EM u.walzer@uni-jena.de
NR 102
TC 27
Z9 30
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0040-1951
J9 TECTONOPHYSICS
JI Tectonophysics
PD JUN 16
PY 2004
VL 384
IS 1-4
BP 55
EP 90
DI 10.1016/j.tecto.2004.02.012
PG 36
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 838IU
UT WOS:000222707700003
ER
PT J
AU Waselenko, JK
MacVittie, TJ
Blakely, WF
Pesik, N
Wiley, AL
Dickerson, WE
Tsu, H
Confer, DL
Coleman, CN
Seed, T
Lowry, P
Armitage, JO
Dainiak, N
AF Waselenko, JK
MacVittie, TJ
Blakely, WF
Pesik, N
Wiley, AL
Dickerson, WE
Tsu, H
Confer, DL
Coleman, CN
Seed, T
Lowry, P
Armitage, JO
Dainiak, N
TI Medical management of the acute radiation syndrome: Recommendations of
the Strategic National Stockpile Radiation Working Group
SO ANNALS OF INTERNAL MEDICINE
LA English
DT Review
ID COLONY-STIMULATING FACTOR; BONE-MARROW-TRANSPLANTATION; STEM-CELL
TRANSPLANTATION; TOTAL-BODY IRRADIATION; IMPROVES NEUTROPHIL RECOVERY;
PERIPHERAL-BLOOD LYMPHOCYTES; EARLY DOSE ASSESSMENT; IONIZING-RADIATION;
FUNGAL-INFECTIONS; FLUCONAZOLE PROPHYLAXIS
AB Physicians, hospitals, and other health care facilities will assume the responsibility for aiding individuals injured by a terrorist act involving radioactive material. Scenarios have been developed for such acts that include a range of exposures resulting in few to many casualties. This consensus document was developed by the Strategic National Stockpile Radiation Working Group to provide a framework for physicians in internal medicine and the medical subspecialties to evaluate and manage large-scale radiation injuries.
Individual radiation close is assessed by determining the time to onset and severity of nausea and vomiting, decline in absolute lymphocyte count over several hours or days after exposure, and appearance of chromosome aberrations (including dicentrics and ring forms) in peripheral blood lymphocytes. Documentation of clinical signs and symptoms (affecting the hematopoietic, gastrointestinal, cerebrovascular, and cutaneous systems) over time is essential for triage of victims, selection of therapy, and assignment of prognosis.
Recommendations based on radiation dose and physiologic response are made for treatment of the hematopoietic syndrome. Therapy includes treatment with hematopoietic cytokines; blood transfusion; and, in selected cases, stem-cell transplantation. Additional medical management based on the evolution of clinical signs and symptoms includes the use of antimicrobial agents (quinolones, antiviral therapy, and antifungal agents), antiemetic agents, and analgesic agents. Because of the strong psychological impact of a possible radiation exposure, psychosocial support will be required for those exposed, regardless of the dose, as well as for family and friends. Treatment of pregnant women must account for risk to the fetus. For terrorist or accidental events involving exposure to radioicidines, prophylaxis against malignant disease of the thyroid is also recommended, particularly for children and adolescents.
C1 Bridgeport Hosp, Dept Med, Bridgeport, CT USA.
Walter Reed Army Med Ctr, Washington, DC USA.
Catholic Univ Amer, Washington, DC USA.
Univ Maryland, Greenebaum Canc Ctr, Baltimore, MD USA.
Armed Forces Radiobiol Res Inst, Bethesda, MD USA.
NIH, Bethesda, MD USA.
Off Emergency Preparedness & Response, Ctr Dis Control & Prevent, Strateg Natl Stockpile Program, Atlanta, GA USA.
Oak Ridge Associated Univ, Oak Ridge, TN USA.
Natl Marrow Donor Program, Minneapolis, MN USA.
Univ Nebraska, Omaha, NE 68182 USA.
Yale New Haven Hlth Syst, New Haven, CT USA.
Yale Univ, Sch Med, New Haven, CT 06520 USA.
RP Dainiak, N (reprint author), Bridgeport Hosp, Dept Med, 267 Grant St, Bridgeport, CT USA.
EM pndain@bpthosp.org
NR 120
TC 316
Z9 334
U1 2
U2 19
PU AMER COLL PHYSICIANS
PI PHILADELPHIA
PA INDEPENDENCE MALL WEST 6TH AND RACE ST, PHILADELPHIA, PA 19106-1572 USA
SN 0003-4819
J9 ANN INTERN MED
JI Ann. Intern. Med.
PD JUN 15
PY 2004
VL 140
IS 12
BP 1037
EP 1051
PG 15
WC Medicine, General & Internal
SC General & Internal Medicine
GA 829NK
UT WOS:000222055500008
PM 15197022
ER
PT J
AU Veryovkin, IV
Belykh, SF
Adriaens, A
Zinovev, AV
Adams, F
AF Veryovkin, IV
Belykh, SF
Adriaens, A
Zinovev, AV
Adams, F
TI On the trends in kinetic energies of secondary ions produced by
polyatomic ion bombardment
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 14th International Conference on Secondary Ion Mass Spectrometry (SIMS
14)
CY SEP 14-19, 2003
CL San Diego, CA
DE molecular beams interactions with solids; secondary ion mass
spectrometry
ID MASS DISTRIBUTIONS; TANTALUM; SPECTRA; NIOBIUM
AB Kinetic energies of Ta-n(+) and Nb-n(+) ions (1 less than or equal to n less than or equal to 10) sputtered from pure Ta and Nb targets by 6 keV per atom Au-, Au-2(-) and Au-3(-) primary ions have been compared after energy spectra of these ions were recalibrated using a newly developed data processing algorithm. Most probable and mean energies were determined for the sputtered ions, and their energy spectra were converted into distributions over inverse velocities. Distributions obtained for Ta and Nb displayed many similarities and no principal differences. The only differences seen were due to the difference in masses of the elements. On the other hand, strong differences were observed between results for atomic and diatomic sputtered ions and those for larger sputtered cluster ions (with more than seven atoms). The comparison of atomic and polyatomic bombardment showed dramatic changes in emission of atomic and diatomic sputtered species, and almost no differences for larger sputtered clusters. (C) 2004 Elsevier B.V. All rights reserved.
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
Univ Instelling Antwerp, Dept Chem, B-2610 Antwerp, Belgium.
State Univ Ghent, Dept Analyt Chem, B-9000 Ghent, Belgium.
RP Veryovkin, IV (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM verigo@anl.gov
RI Adriaens, Annemie/F-2520-2013
OI Adriaens, Annemie/0000-0003-4034-1881
NR 13
TC 7
Z9 7
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD JUN 15
PY 2004
VL 231
SI SI
BP 101
EP 105
DI 10.1016/j.apsusc.2004.03.051
PG 5
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 834RG
UT WOS:000222427700020
ER
PT J
AU Ohlhausen, JAT
Keenan, MR
Kotula, PG
Peebles, DE
AF Ohlhausen, JAT
Keenan, MR
Kotula, PG
Peebles, DE
TI Multivariate statistical analysis of time-of-flight secondary ion mass
spectrometry images using AXSIA
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 14th International Conference on Secondary Ion Mass Spectrometry (SIMS
14)
CY SEP 14-19, 2003
CL San Diego, CA
DE multivariate; components; statistical; AXSIA; TOF-SIMS
AB Time-of-flight secondary ion mass spectrometry (TOF-SIMS) by its parallel nature, generates complex and very large datasets quickly and easily. An example of such a large dataset is a spectral image where a complete spectrum is collected for each pixel. Unfortunately, the large size of the data matrix involved makes it difficult to extract the chemical information from the data using traditional techniques. Because time constraints prevent an analysis of every peak, prior knowledge is used to select the most probable and significant peaks for evaluation. However, this approach may lead to a misinterpretation of the system under analysis. Ideally, the complete spectral image would be used to provide a comprehensive, unbiased materials characterization based on full spectral signatures.
Automated eXpert spectral image analysis (AXSIA) software developed at Sandia National Laboratories implements a multivariate curve resolution technique that was originally developed for energy dispersive X-ray spectroscopy (EDS) [Microsci. Microanal. 9 (2003) 1]. This paper will demonstrate the application of the method to TOF-SIMS. AXSIA distills complex and very large spectral image datasets into a limited number of physically realizable and easily interpretable chemical components, including both spectra and concentrations. The number of components derived during the analysis represents the minimum number of components needed to completely describe the chemical information in the original dataset. Since full spectral signatures are used to determine each component, an enhanced signal-to-noise is realized. The efficient statistical aggregation of chemical information enables small and unexpected features to be automatically found without user intervention. (C) 2004 Elsevier B.V. All rights reserved.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Ohlhausen, JAT (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM jaohlha@sandia.gov
RI Kotula, Paul/A-7657-2011
OI Kotula, Paul/0000-0002-7521-2759
NR 2
TC 38
Z9 38
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD JUN 15
PY 2004
VL 231
SI SI
BP 230
EP 234
DI 10.1016/j.apsusc.2004.03.020
PG 5
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 834RG
UT WOS:000222427700044
ER
PT J
AU Keenan, MR
Kotula, PG
AF Keenan, MR
Kotula, PG
TI Optimal scaling of TOF-SIMS spectrum-images prior to multivariate
statistical analysis
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 14th International Conference on Secondary Ion Mass Spectrometry (SIMS
14)
CY SEP 14-19, 2003
CL San Diego, CA
DE multivariate analysis; PCA; Poisson noise; TOF-SIMS imaging
AB Time-of-flight secondary ion mass spectrometry (TOF-SIMS) is capable of generating huge volumes of data. TOF-SIMS spectrum-images, comprising complete mass spectra at each point in a spatial array, are easily acquired with modern instrumentation. With the addition of depth profiling, spectra can be collected from tip to three spatial dimensions leading to data sets that are seemingly unlimited in size. Multivariate statistical techniques such as principal component analysis, multivariate curve resolution and other factor analysis methods are being used to meet the challenge of turning that mountain of data into analytically useful knowledge. These methods work by extracting the essential chemical information embedded in the high dimensional data into a limited number of factors that describe the spectrally active pure components present in the sample. A review of the recent literature shows that the mass spectral data are often scaled prior to multivariate analysis. Common preprocessing steps include normalization of the pixel intensities, and auto- or variance-scaling of the mass spectra. In this paper, we will demonstrate that these pretreatments can lead to less than satisfactory results and, in fact, can be counterproductive. By taking the Poisson nature of the data into consideration, however, a scaling method can be devised that is optimal in a maximum likelihood sense. Using a simple and intuitive example, we will demonstrate the superiority of the optimal scaling approach for estimating the number of pure components, for segregating the chemical information into as few components as possible, and for discriminating small features from noise. (C) 2004 Elsevier B.V. All rights reserved.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Keenan, MR (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM mrkeena@sandia.gov
RI Kotula, Paul/A-7657-2011
OI Kotula, Paul/0000-0002-7521-2759
NR 8
TC 59
Z9 59
U1 0
U2 9
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD JUN 15
PY 2004
VL 231
SI SI
BP 240
EP 244
DI 10.1016/j.apsusc.2004.03.025
PG 5
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 834RG
UT WOS:000222427700046
ER
PT J
AU Smentkowski, VS
Ohlhausen, JA
Kotula, PG
Keenan, MR
AF Smentkowski, VS
Ohlhausen, JA
Kotula, PG
Keenan, MR
TI Multivariate statistical analysis of time-of-flight secondary ion mass
spectrometry images-looking beyond the obvious
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 14th International Conference on Secondary Ion Mass Spectrometry (SIMS
14)
CY SEP 14-19, 2003
CL San Diego, CA
DE ToF-SIMS; AXSIA; MVSA; multivariate statistical analysis; burst pulsing
mode
AB Analytical instrumentation such as time-of-flight secondary ion mass spectrometry (ToF-SIMS) provides a tremendous quantity of data since an entire mass spectrum is saved at each pixel in an ion image. The analyst often selects only a few species for detailed analysis; the majority of the data are not utilized. Researchers at Sandia National Laboratory (SNL) have developed a powerful multivariate statistical analysis (MVSA) toolkit named AXSIA (Automated eXpert Spectrum Image Analysis) that looks for trends in complete datasets (e.g., analyzes the entire mass spectrum at each pixel). A unique feature of the AXSIA toolkit is the generation of intuitive results (e.g., negative peaks are not allowed in the spectral response). The robust statistical process is able to unambiguously identify all of the spectral features uniquely associated with each distinct component throughout the dataset. General Electric and Sandia used AXSIA to analyze raw data files generated on an Ion TofIV ToF-SIMS instrument. Here, we will show that the MVSA toolkit identified metallic contaminants within a defect in a polymer sample. These metallic contaminants were not identifiable using standard data analysis protocol. (C) 2004 Elsevier B.V. All rights
C1 Gen Elect, Global Res Ctr, Niskayuna, NY 12309 USA.
Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Smentkowski, VS (reprint author), Gen Elect, Global Res Ctr, Bldg K1,Room 1C2, Niskayuna, NY 12309 USA.
EM smentkow@crd.ge.com
RI Kotula, Paul/A-7657-2011
OI Kotula, Paul/0000-0002-7521-2759
NR 7
TC 28
Z9 28
U1 1
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD JUN 15
PY 2004
VL 231
SI SI
BP 245
EP 249
DI 10.1016/j.apsusc.2004.03.027
PG 5
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 834RG
UT WOS:000222427700047
ER
PT J
AU Zhu, ZM
Kelley, MJ
AF Zhu, ZM
Kelley, MJ
TI Effect of deep UV (172 nm) irradiation on PET: ToF/SIMS analysis
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 14th International Conference on Secondary Ion Mass Spectrometry (SIMS
14)
CY SEP 14-19, 2003
CL San Diego, CA
DE surface modification; surface characterization; ToF/SIMS; polymer
photochemistry
ID ION MASS-SPECTROMETRY; TOF-SIMS; SURFACE; POLY(ETHYLENE-TEREPHTHALATE);
INTENSITY; RADIATION; FILMS
AB Irradiation of PET with 172 nm UV light in the absence of oxygen induces carbonyl elimination and carboxylic acid formation. Using ToF/SIMS to examine irradiated and as received materials with and without deuteration provides insight into the mechanisms. A Norrish type II mechanism is indicated for acid group formation and the mechanism of Day and Wiles [J. Appl. Polym. Sci. 16 (1972) 175; Polym. Lett. 9 (1971) 665] for decarbonylation. (C) 2004 Elsevier B.V. All rights reserved.
C1 Coll William & Mary, Appl Res Ctr, Dept Appl Sci, Newport News, VA 23606 USA.
Jefferson Lab, Free Electron Laser Dept, Newport News, VA 23606 USA.
RP Kelley, MJ (reprint author), Coll William & Mary, Appl Res Ctr, Dept Appl Sci, Suite 601,12050 Jefferson Ave, Newport News, VA 23606 USA.
EM mkelley@jlab.org
NR 14
TC 9
Z9 11
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD JUN 15
PY 2004
VL 231
SI SI
BP 302
EP 308
DI 10.1016/j.apsusc.2004.03.068
PG 7
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 834RG
UT WOS:000222427700058
ER
PT J
AU Quong, JN
Knize, MG
Kulp, KS
Wu, KJ
AF Quong, JN
Knize, MG
Kulp, KS
Wu, KJ
TI Molecule-specific imaging analysis of carcinogens in breast cancer cells
using time-of-flight secondary ion mass spectrometry
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 14th International Conference on Secondary Ion Mass Spectrometry (SIMS
14)
CY SEP 14-19, 2003
CL San Diego, CA
DE TOF-SIMS; imaging; MCF-7 cell
ID FREEZE-FRACTURE; IDENTIFICATION; MUTAGEN
AB Imaging time-of-flight secondary ion mass spectrometry (TOF-SIMS) was used to study the localization of heterocyclic amines in MCF-7 line of human breast cancer cells. The detection sensitivities of amodel rodentmutagen, 2-amino-l-methyl-6phenylimidazo[4,5-b]pyridine (PhIP), were determined. Following an established criteria for the determination of status of freeze-fracture cells, the distribution of PhIP in the MCF-7 cells was reported. (C) 2004 Published by Elsevier B.V.
C1 Lawrence Livermore Natl Lab, Div Chem & Mat Sci, Livermore, CA 94550 USA.
Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA 94550 USA.
RP Wu, KJ (reprint author), Lawrence Livermore Natl Lab, Div Chem & Mat Sci, Livermore, CA 94550 USA.
NR 7
TC 14
Z9 14
U1 1
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD JUN 15
PY 2004
VL 231
SI SI
BP 424
EP 427
DI 10.1016/j.apsusc.2004.03.156
PG 4
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 834RG
UT WOS:000222427700081
ER
PT J
AU Gaspar, DJ
Laskin, A
Wang, W
Hunt, SW
Finlayson-Pitts, BJ
AF Gaspar, DJ
Laskin, A
Wang, W
Hunt, SW
Finlayson-Pitts, BJ
TI TOF-SIMS analysis of sea salt particles: imaging and depth profiling in
the discovery of an unrecognized mechanism for pH buffering
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 14th International Conference on Secondary Ion Mass Spectrometry (SIMS
14)
CY SEP 14-19, 2003
CL San Diego, CA
DE TOF-SIMS; imaging; depth profiling; sea salt; environmental chemistry
ID CLIMATE
AB As part of a broader effort at understanding the chemistry of sea salt particles, we have performed time-of-flight secondary ion mass spectroscopy (TOF-SIMS) analysis of individual sea salt particles deposited on a transmission electron microscopy (TEM) grid. Scanning electron microscopy (SEM) and TOF-SIMS analysis have, in conjunction with OH exposure studies, led to the discovery of an unrecognized buffering mechanism in the uptake and oxidation of SO2 in sea salt particles in the marine boundary layer. This chemistry may resolve some discrepancies in the atmospheric chemistry literature. Several challenges during the acquisition and interpretation of both imaging and depth profiling data on specific particles on the TEM grid identified by the SEM were overcome. A description of the analysis challenges and the solutions ultimately developed to them is presented here, along with an account of how the TOF-SIMS data were incorporated into the overall research effort. Several issues unique to the analysis of high aspect ratio particles are addressed. (C) 2004 Elsevier B.V. All rights reserved.
C1 Pacific NW Natl Lab, Environm & Mol Sci Lab, Richland, WA 99352 USA.
Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA.
RP Gaspar, DJ (reprint author), Pacific NW Natl Lab, Environm & Mol Sci Lab, Richland, WA 99352 USA.
EM daniel.gaspar@pnl.gov
RI Gaspar, Dan/H-6166-2011; Laskin, Alexander/I-2574-2012
OI Laskin, Alexander/0000-0002-7836-8417
NR 8
TC 19
Z9 19
U1 3
U2 12
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD JUN 15
PY 2004
VL 231
SI SI
BP 520
EP 523
DI 10.1016/j.apsusc.2004.03.046
PG 4
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 834RG
UT WOS:000222427700101
ER
PT J
AU Reedy, RC
Geisz, JF
Ptak, AJ
Keyes, BM
Metzger, WK
AF Reedy, RC
Geisz, JF
Ptak, AJ
Keyes, BM
Metzger, WK
TI Characterization of light element impurities in
gallium-nitride-phosphide by SIMS analysis
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 14th International Conference on Secondary Ion Mass Spectrometry (SIMS
14)
CY SEP 14-19, 2003
CL San Diego, CA
DE SIMS; background; raster; light element; GaNP
AB GaNP thin films grown by epitaxial processes show little or no carbon or oxygen incorporation when measured by secondary ion mass spectrometry. Accurate determination of impurity concentration is important for understanding the optical and electrical properties of this material. A new method for background subtraction is proposed, with the main assumption that the background contribution is inversely proportional to the secondary ion matrix signal. The total impurity concentration, i.e. the sum of real and background, is given by the inverse function. Efforts are taken to reduce background limits before background subtraction is performed. As the matrix signal increases, the background contribution becomes insignificant as the total impurity level approaches the real level. Multiple data points are obtained from several sputter rates. The real impurity level is obtained from the least-squares fit of the total impurity concentration versus matrix signal. Background subtraction via inverse function is an intuitive method that can be effectively used to remove gas-phase contributions in measurements of light elements in the thin films grown by epitaxial processes. (C) 2004 Elsevier B.V. All rights reserved.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Reedy, RC (reprint author), Natl Renewable Energy Lab, MS 3215,1617 Cole Blvd, Golden, CO 80401 USA.
EM bob_reedy@nrel.gov
NR 7
TC 0
Z9 0
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD JUN 15
PY 2004
VL 231
SI SI
BP 808
EP 812
DI 10.1016/j.apsusc.2004.03.080
PG 5
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 834RG
UT WOS:000222427700160
ER
PT J
AU Kettle, S
Chater, RJ
Graham, GA
McPhail, DS
Kearsley, AT
AF Kettle, S
Chater, RJ
Graham, GA
McPhail, DS
Kearsley, AT
TI FIB-SIMS analysis of micro-particle impacts on spacecraft materials
returned from low-earth orbit
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 14th International Conference on Secondary Ion Mass Spectrometry (SIMS
14)
CY SEP 14-19, 2003
CL San Diego, CA
DE micro-particle; impacts; LEO; FIB-SIMS; LMIS
AB Returned materials from spacecraft that have had a long exposure in low earth orbit have been examined for remnant projectile residues by liquid metal ion source (LMIS) sputtering and SIMS. It has been possible to distinguish between residue material and the underlying substrate in impact sites as well as the origin of the residue, man-made or extraterrestrial. This approach has also allowed examination of the sub-micrometer internal structures of residue remnants. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2AZ, England.
Lawrence Livermore Natl Lab, IGPP, Livermore, CA 94551 USA.
Nat Hist Museum, Dept Mineral, London SW7 5BD, England.
RP Chater, RJ (reprint author), Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2AZ, England.
EM r.chater@imperial.ac.uk
NR 7
TC 4
Z9 4
U1 1
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD JUN 15
PY 2004
VL 231
SI SI
BP 893
EP 898
DI 10.1016/j.apsusc.2004.03.161
PG 6
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 834RG
UT WOS:000222427700178
ER
PT J
AU Cliff, JB
Gaspar, DJ
Bottomley, PJ
Myrold, DD
AF Cliff, JB
Gaspar, DJ
Bottomley, PJ
Myrold, DD
TI Peak fitting to resolve CN- isotope ratios in biological and
environmental samples using TOF-SIMS
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 14th International Conference on Secondary Ion Mass Spectrometry (SIMS
14)
CY SEP 14-19, 2003
CL San Diego, CA
DE TOF-SIMS; environmental; nitrogen; peak fitting; biological
ID ION MASS-SPECTROMETRY
AB Our research has focused on developing TOF-SIMS to measure organic N-15 in environmental samples [Appl. Environ. Microbiol. 68 (8) (2002) 4067]. Our goal was to develop a peak-fitting algorithm that would successfully remove the isobaric interferences of Al- and (CN-)-C-13-N-14 from (CN-)-C-12-N-15 ions under conditions of low mass resolution inherent in environmental samples. We tested a variety of peak-fitting models and found that the EMG + GMG (E + G) model performed better than the standard peak shape shifting method under conditions of high mass resolution, unless Al- was present as an interference. Under conditions of Al- interference and low N-15 content, the standard method performed better than the E + G model. As N-15 content increased, the E + G model worked comparably or better than the standard method. Limited mass resolution during analysis of organic N-15 standards on kaolin clay dictated using the standard method which performed acceptably on standards containing greater than 1 at.% N-15. These data emphasize the potential utility of using analytical models to resolve isobaric interferences in TOF-SIMS. (C) 2004 Elsevier B.V. All rights reserved.
C1 Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331 USA.
Pacific NW Natl Lab, Environm & Mol Sci Lab, Richland, WA 99352 USA.
RP Cliff, JB (reprint author), Oregon State Univ, Dept Crop & Soil Sci, 3017 Ag & Life Sci Bldg, Corvallis, OR 97331 USA.
EM john.cliff@oregonstate.edu
RI Cliff, John/C-7696-2011; Myrold, David/E-1813-2011; Gaspar,
Dan/H-6166-2011
OI Cliff, John/0000-0002-7395-5604; Myrold, David/0000-0001-6418-226X;
NR 9
TC 5
Z9 5
U1 0
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD JUN 15
PY 2004
VL 231
SI SI
BP 912
EP 916
DI 10.1016/j.apsusc.2004.03.169
PG 5
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 834RG
UT WOS:000222427700182
ER
PT J
AU Veryovkin, IV
Calaway, WF
Moore, JF
Pellin, MJ
Lewellen, JW
Li, YL
Milton, SV
King, BV
Petravic, M
AF Veryovkin, IV
Calaway, WF
Moore, JF
Pellin, MJ
Lewellen, JW
Li, YL
Milton, SV
King, BV
Petravic, M
TI A new horizon in secondary neutral mass spectrometry: post-ionization
using a VUV free electron laser
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 14th International Conference on Secondary Ion Mass Spectrometry (SIMS
14)
CY SEP 14-19, 2003
CL San Diego, CA
DE secondary neutral mass spectrometry; photoionization of atoms and
molecules; laser desorption; free electron laser
ID SELF-ASSEMBLED MONOLAYERS
AB A new time-of-flight (TOF) mass spectrometer incorporating post-ionization of sputtered neutral species with tunable vacuum ultraviolet (VUV) light generated by a free electron laser (FEL) has been developed. Capabilities of this instrument, called SPIRIT, were demonstrated by experiments with photoionization of sputtered neutral gold atoms with 125 nm light generated by the VUV FEL located at Argonne National Laboratory (ANL). In a separate series of experiments with a fixed wavelength VUV light source, a 157 nm F-2 laser, a useful yield (atoms detected per atoms sputtered) of about 12% and a mass resolution better than 1500 were demonstrated for molybdenum. (C) 2004 Elsevier B.V. All rights reserved.
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
Univ Newcastle, Dept Phys, Newcastle, NSW 2308, Australia.
Australian Natl Univ, Dept Elect Mat Engn, Canberra, ACT 0200, Australia.
RP Veryovkin, IV (reprint author), Argonne Natl Lab, Div Mat Sci, Bldg 200,9700 S Cass Ave, Argonne, IL 60439 USA.
EM verigo@anl.gov
RI Pellin, Michael/B-5897-2008
OI Pellin, Michael/0000-0002-8149-9768
NR 15
TC 5
Z9 5
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD JUN 15
PY 2004
VL 231
SI SI
BP 962
EP 966
DI 10.1016/j.apsusc.2004.03.191
PG 5
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 834RG
UT WOS:000222427700193
ER
PT J
AU Maharrey, S
Bastasz, R
Behrens, R
Highley, A
Hoffer, S
Kruppa, G
Whaley, J
AF Maharrey, S
Bastasz, R
Behrens, R
Highley, A
Hoffer, S
Kruppa, G
Whaley, J
TI High mass resolution SIMS
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 14th International Conference on Secondary Ion Mass Spectrometry (SIMS
14)
CY SEP 14-19, 2003
CL San Diego, CA
DE chemical imaging; FTICR; LMIS; PCA; reflectron; ToF
AB We are developing a method to conduct SIMS analysis at high mass resolution (mlDeltam > 50,000), to facilitate the examination and study of complex organic and biomolecules on surfaces. The approach uses a primary-ion beam probe (rastered 25 keV Ga+ ion source), providing high (100 nm) spatial resolution, and an ion cyclotron resonance (ICR) cell, capable of mass analysis at a resolution in excess of 105 and mass accuracy of less than 1.0 ppm. The apparatus includes a time-of-flight (ToF) mass analyzer, offering rapid chemical mapping at low (m/Deltam < 10,000) mass resolution to identify points of interest for subsequent high mass resolution analysis. To combine both ICR and TOF mass analysis in one instrument requires the sample to be near ground potential, to inject secondary ions into the grounded ICR cell at low enough kinetic energies to permit high trapping efficiency. Consequently, the optics and detector for ToF analysis must be electrically floating at the desired acceleration potential for the secondary ions. For high-resolution mass analysis, secondary ions are transmitted to the ICR cell, which is in line-of-sight to the sample and immersed in a homogeneous magnetic field (7 T). Initial results from the instrument show that it is possible to trap simple ions effectively for high-resolution analysis, but high-mass ions (m/z > 300), although, readily detected by the ToF analyzer, are inefficiently transmitted to the ICR cell. This has stimulated the design of a new ion optics coupling arrangement, which provides a higher mass resolution over a wider mass range. (C) 2004 Elsevier B.V. All rights reserved.
C1 Sandia Natl Labs, Livermore, CA 94551 USA.
RP Maharrey, S (reprint author), Sandia Natl Labs, POB 969,MS 9052, Livermore, CA 94551 USA.
EM spmahar@sandia.gov
NR 4
TC 7
Z9 7
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD JUN 15
PY 2004
VL 231
SI SI
BP 972
EP 975
DI 10.1016/j.apsusc.2004.03.197
PG 4
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 834RG
UT WOS:000222427700195
ER
PT J
AU Weber, TJ
Negash, S
Smallwood, HS
Ramos, KS
Thrall, BD
Squier, TC
AF Weber, TJ
Negash, S
Smallwood, HS
Ramos, KS
Thrall, BD
Squier, TC
TI Calmodulin involvement in stress-activated nuclear localization of
albumin in JB6 epithelial cells
SO BIOCHEMISTRY
LA English
DT Article
ID MEMBRANE CA-ATPASE; ANTIOXIDANT RESPONSE ELEMENT; PROXIMAL TUBULAR
CELLS; PROTEIN-KINASE-C; FACTOR-KAPPA-B; SARCOPLASMIC-RETICULUM
CA2+-ATPASE; MOUSE EPIDERMAL-CELLS; SMOOTH-MUSCLE CELLS; YA-SUBUNIT
GENE; NEOPLASTIC TRANSFORMATION
AB We report that albumin is translocated to the nucleus in response to oxidative stress. Prior measurements have demonstrated that in concert with known transcription factors albumin binds to an antioxidant response element, which controls the expression of glutathione S-transferase and other antioxidant enzymes that function to mediate adaptive cellular responses [Holderman, M. T., Miller, K. P., Dangott, L. J., and Ramos, K. S. (2002) Mol. Pharmacol. 61, 1174-1183]. To investigate the mechanisms underlying this adaptive cell response, we have identified linkages between calcium signaling and the nuclear translocation of albumin in JB6 epithelial cells. Under resting conditions, albumin and the calcium regulatory protein calmodulin (CaM) co-immunoprecipitate using antibodies against either protein, indicating a tight association. Calcium activation of CaM disrupts the association between CaM and albumin, suggesting that transient increases in cytosolic calcium levels function to mobilize intracellular albumin to facilitate its translocation into the nucleus. Likewise, nuclear translocation of albumin is induced by exposure of cells to hydrogen peroxide or a phorbol ester, indicating a functional linkage between reactive oxygen species, calcium, and PKC-signaling pathways. Inclusion of an antioxidant enzyme (i.e., superoxide dismutase) blocks nuclear translocation, suggesting that the oxidation of sensitive proteins functions to coordinate the adaptive cellular response. These results suggest that elevated calcium transients and associated increases in reactive oxygen species contribute to adaptive cellular responses through the mobilization and nuclear translocation of cellular albumin.
C1 Pacific NW Natl Lab, Div Biol Sci, Cell Biol Grp, Richland, WA 99352 USA.
Univ Louisville, Hlth Sci Ctr, Dept Biochem & Mol Biol, Louisville, KY 40292 USA.
RP Weber, TJ (reprint author), Pacific NW Natl Lab, Div Biol Sci, Cell Biol Grp, Richland, WA 99352 USA.
EM thomas.weber@pnl.gov
FU NIA NIH HHS [AG12993]
NR 67
TC 4
Z9 4
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0006-2960
J9 BIOCHEMISTRY-US
JI Biochemistry
PD JUN 15
PY 2004
VL 43
IS 23
BP 7443
EP 7450
DI 10.1021/bi049731s
PG 8
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 827QI
UT WOS:000221915100020
PM 15182187
ER
PT J
AU Wiens, RC
Bochsler, P
Burnett, DS
Wimmer-Schweingruber, RF
AF Wiens, RC
Bochsler, P
Burnett, DS
Wimmer-Schweingruber, RF
TI Solar and solar-wind isotopic compositions
SO EARTH AND PLANETARY SCIENCE LETTERS
LA English
DT Article
DE solar wind; solar abundances; solar nebula
ID ENERGETIC PARTICLES; LUNAR-SAMPLES; BOARD SOHO; PROTOSOLAR CLOUD; ION
MEASUREMENTS; ABUNDANCE RATIO; NOBLE-GASES; NITROGEN; HE-3;
FRACTIONATION
AB With only a few exceptions, the solar photosphere is thought to have retained the mean isotopic composition of the original solar nebula, so that, with some corrections, the photosphere provides a baseline for comparison of all other planetary materials. There are two sources of information on the photospheric isotopic composition: optical observations, which have succeeded in determining a few isotopic ratios with large uncertainties, and the solar wind, measured either in situ by spacecraft instruments or as implanted ions into lunar or asteroidal soils or collection substrates. Gravitational settling from the outer convective zone (OCZ) into the radiative core is viewed as the only solar modification of solar-nebula isotopic compositions to affect all elements. Evidence for gravitational settling is indirect, as observations are presently less precise than the predictions of < 10 effects for the isotopes of solid-forming elements. Additional solar modification has occurred for light isotopes (D, Li, Be, B) due to nuclear destruction at the base of the convection zone, and due to production by nuclear reactions of photospheric materials with high-energy particles from the corona. Isotopic fractionation of long-term average samples of solar wind has been suggested by theory. There is some evidence, though not unambiguous, indicating that interstream (slow) wind is isotopically lighter than high-speed wind from coronal holes, consistent with Coulomb drag theories. The question of fractionation has not been clearly answered because the precision of spacecraft instruments is not sufficient to clearly demonstrate the predicted fractionations, which are < 30 per amu between fast and slow wind for most elements. Analysis of solar-wind noble gases extracted from lunar and asteroidal soils, when compared with the terrestrial atmospheric composition, also suggests solar-wind fractionation consistent with Coulomb drag theories. Observations of solar and solar-wind compositions are reviewed for nearly all elements from hydrogen to iron, as well as the heavy noble gases. Other than Li and the noble gases, there is presently no evidence for differences among stable isotopes between terrestrial and solar photosphere compositions. Although spacecraft observations of solar-wind isotopes have added significantly to our knowledge within the past decade, more substantial breakthroughs are likely to be seen within the next several years with the return of long-exposure solar-wind samples from the Genesis mission, which should yield much higher precision measurements than in situ spacecraft instruments. (C) 2004 Elsevier B.V. All rights reserved.
C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
Univ Bern, Inst Phys, CH-3012 Bern, Switzerland.
CALTECH, Dept Geol, Pasadena, CA 91125 USA.
Univ Kiel, Inst Expt & Angew Phys, D-24118 Kiel, Germany.
RP Los Alamos Natl Lab, Mail Stop D-466, Los Alamos, NM 87544 USA.
EM rwiens@lanl.gov
NR 73
TC 22
Z9 22
U1 0
U2 4
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 JUN 15
PY 2004
VL 222
IS 3-4
BP 697
EP 712
DI 10.1016/j.epsl.2004.03.025
PG 16
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 831OB
UT WOS:000222202700001
ER
PT J
AU Trehu, AM
Long, PE
Torres, ME
Bohrmann, G
Rack, FR
Collett, TS
Goldberg, DS
Milkov, AV
Riedel, M
Schultheiss, P
Bangs, NL
Barr, SR
Borowski, WS
Claypool, GE
Delwiche, ME
Dickens, GR
Gracia, E
Guerin, G
Holland, M
Johnson, JE
Lee, YJ
Liu, CS
Su, X
Teichert, B
Tomaru, H
Vanneste, M
Watanabe, M
Weinberger, JL
AF Trehu, AM
Long, PE
Torres, ME
Bohrmann, G
Rack, FR
Collett, TS
Goldberg, DS
Milkov, AV
Riedel, M
Schultheiss, P
Bangs, NL
Barr, SR
Borowski, WS
Claypool, GE
Delwiche, ME
Dickens, GR
Gracia, E
Guerin, G
Holland, M
Johnson, JE
Lee, YJ
Liu, CS
Su, X
Teichert, B
Tomaru, H
Vanneste, M
Watanabe, M
Weinberger, JL
TI Three-dimensional distribution of gas hydrate beneath southern Hydrate
Ridge: constraints from ODP Leg 204
SO EARTH AND PLANETARY SCIENCE LETTERS
LA English
DT Article
DE gas hydrates; Ocean Drilling Program; methane; accretionary margins;
marine sediments
ID METHANE HYDRATE; BLAKE RIDGE; LATEST PALEOCENE; CASCADIA MARGIN;
SEDIMENTS; PROVINCES; DEPOSITS; REGION; OREGON; ORIGIN
AB Large uncertainties about the energy resource potential and role in global climate change of gas hydrates result from uncertainty about how much hydrate is contained in marine sediments. During Leg 204 of the Ocean Drilling Program (ODP) to the accretionary complex of the Cascadia subduction zone, we sampled the gas hydrate stability zone (GHSZ) from the seafloor to its base in contrasting geological settings defined by a 3D seismic survey. By integrating results from different methods, including several new techniques developed for Leg 204, we overcome the problem of spatial under-sampling inherent in robust methods traditionally used for estimating the hydrate content of cores and obtain a high-resolution, quantitative estimate of the total amount and spatial variability of gas hydrate in this structural system. We conclude that high gas hydrate content (30-40% of pore space or 20-26% of total volume) is restricted to the upper tens of meters below the seafloor near the summit of the structure, where vigorous fluid venting occurs. Elsewhere, the average gas hydrate content of the sediments in the gas hydrate stability zone is generally < 2% of the pore space, although this estimate may increase by a factor of 2 when patchy zones of locally higher gas hydrate content are included in the calculation. These patchy zones are structurally and stratigraphically controlled, contain up to 20% hydrate in the pore space when averaged over zones similar to 10 m thick, and may occur in up to similar to 20% of the region imaged by 3D seismic data. This heterogeneous gas hydrate distribution is an important constraint on models of gas hydrate formation in marine sediments and the response of the sediments to tectonic and environmental change. Published by Elsevier B.V.
C1 Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA.
Pacific NW Natl Lab, Richland, WA 99352 USA.
Univ Bremen, Dept Geosci, D-28359 Bremen, Germany.
JOI, Washington, DC 20036 USA.
US Geol Survey, Denver Fed Ctr, Lakewood, CO 80225 USA.
Lamont Doherty Earth Observ, Borehole Res Grp, Palisades, NY 10964 USA.
Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA.
Geol Survey Canada, Pacific Geosci Ctr, Sidney, BC V8L 4B2, Canada.
GEOTEK, Daventry NN11 5RD, Northants, England.
Univ Texas, Inst Geophys, Austin, TX 78759 USA.
Univ Leicester, Dept Geol, Leicester LE1 7RH, Leics, England.
Eastern Kentucky Univ, Dept Earth Sci, Richmond, KY 40475 USA.
Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA.
Rice Univ, Dept Earth Sci, Houston, TX 77005 USA.
Ctr Mediterrani Invest Marines & Ambientals, Unitat Tecnol Marina, Barcelona 08003, Spain.
Arizona State Univ, Dept Geol Sci, Tempe, AZ 85287 USA.
Korea Inst Geosci & Mineral Resources, Petr & Marine Resources Res Div, Taejon 305350, South Korea.
Natl Taiwan Univ, Inst Oceanog, Taipei 106, Taiwan.
China Univ Geosci, Ctr Marine Geol, Beijing, Peoples R China.
Univ Bremen, Forschungszentrum Ozeanrander, D-28334 Bremen, Germany.
Univ Tokyo, Dept Earth & Planetary Sci, Tokyo 1130033, Japan.
Univ Tromso, Dept Geol, N-9037 Tromso, Norway.
Geol Survey Japan, Inst Geosci, Tsukuba, Ibaraki 3058567, Japan.
Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
RP Trehu, AM (reprint author), Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA.
EM trehu@coas.oregonstate.edu
RI Bangs, Nathan/A-1584-2009; Dickens, Gerald/G-1222-2011; Long,
Philip/F-5728-2013; Gracia, Eulalia/E-6153-2013; Bohrmann,
Gerhard/D-4474-2017;
OI Bangs, Nathan/0000-0002-4377-3463; Long, Philip/0000-0003-4152-5682;
Gracia, Eulalia/0000-0001-9311-3108; Bohrmann,
Gerhard/0000-0001-9976-4948; Johnson, Joel/0000-0002-5671-7209; Liu,
Char-Shine/0000-0003-0357-714X
NR 42
TC 153
Z9 166
U1 4
U2 52
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 JUN 15
PY 2004
VL 222
IS 3-4
BP 845
EP 862
DI 10.1016/j.epsl.2004.03.035
PG 18
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 831OB
UT WOS:000222202700012
ER
PT J
AU Christensen, JN
Dresel, PE
Conrad, ME
Maher, K
Depaolo, DJ
AF Christensen, JN
Dresel, PE
Conrad, ME
Maher, K
Depaolo, DJ
TI Identifying the sources of subsurface contamination at the Hanford Site
in Washington using high-precision uranium isotopic measurements
SO ENVIRONMENTAL SCIENCE & TECHNOLOGY
LA English
DT Article
ID INDUCTIVELY-COUPLED PLASMA; MULTIPLE-COLLECTOR-ICPMS; RIVER PLAIN
AQUIFER; RATIO MEASUREMENT; EVOLUTION
AB In the mid-1990s, a groundwater plume of uranium (U) was detected in monitoring wells in the B-BX-BY Waste Management Area at the Hanford Site in Washington. This area has been used since the late 1940s to store high-level radioactive waste and other products of U fuel-rod processing. Using multiple-collector ICP source magnetic sector mass spectrometry, high-precision uranium isotopic analyses were conducted of samples of vadose zone contamination and of groundwater. The isotope ratios U-236/U-238, U-234/U-238, and U-231/U-235 are used to distinguish contaminant sources. On the basis of the isotopic data, the source of the groundwater contamination appears to be related to a 1951 overflow event at tank BX-102 that spilled high-level U waste into the vadose zone. The U isotopic variation of the groundwater plume is a result of mixing between contaminant U from this spill and natural background U. Vadose zone U contamination at tank B-110 likely predates the recorded tank leak and can be ruled out as a significant source of groundwater contamination, based on the U isotopic composition. The locus of vadose zone contamination is displaced from the initial locus of groundwater contamination, indicating that lateral migration in the vadose zone was at least 8 times greater than vertical migration. The time evolution of the groundwater plume suggests an average U migration rate of similar to0.7-0.8 m/day showing slight retardation relative to a groundwater flow of similar to1 m/day.
C1 Lawrence Berkeley Natl Lab, Ctr Isotope Geochem, Berkeley, CA 94720 USA.
Pacific NW Natl Lab, Richland, WA 99352 USA.
Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
RP Christensen, JN (reprint author), Lawrence Berkeley Natl Lab, Ctr Isotope Geochem, 1 Cyclotron Rd,MS 70A4418, Berkeley, CA 94720 USA.
EM jnchristensen@lbl.gov
RI Conrad, Mark/G-2767-2010; Maher, Kate/B-3489-2010; Christensen,
John/D-1475-2015
OI Maher, Kate/0000-0002-5982-6064;
NR 30
TC 32
Z9 32
U1 0
U2 14
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 JUN 15
PY 2004
VL 38
IS 12
BP 3330
EP 3337
DI 10.1021/es034700q
PG 8
WC Engineering, Environmental; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA 829MA
UT WOS:000222051400028
PM 15260332
ER
PT J
AU Laudal, DL
Thompson, JS
Pavlish, JH
Brickett, LA
Chu, P
AF Laudal, DL
Thompson, JS
Pavlish, JH
Brickett, LA
Chu, P
TI Use of continuous mercury monitors at coal-fired utilities
SO FUEL PROCESSING TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT Air Quality 3rd Conference on Mercury Trace Elements and Particulate
Matter
CY SEP 09-12, 2002
CL Arlington, VA
AB In December 2000, the U.S. Environmental Protection Agency (EPA) published a notice of its determination that regulation of coal-fired utilities for mercury is appropriate and necessary as part of the hazardous air pollutant emission regulation for electric utility steam-generating units. To aid in the determination of mercury emissions from these sources, on-line mercury semicontinuous emission monitors (Hg SCEMs) have been developed and tested in recent years. Although Hg SCEMs have shown promise during these previous tests, rigorous field or long-term testing has not been done.
In the past year, commercially available and prototype Hg SCEMs have been used by the Energy and Environmental Research Center (EERC) and others at several power plants. As part of the EERC work, Hg SCEMs were operated at a range of conditions and locations. In addition, the Hg SCEMs were operated for up to 1 month. The use of Hg SCEMs at these plants allowed for near-real-time data to be collected under changing plant conditions, as well as during normal ranges of operating conditions. Mercury emission data were obtained from different plants with different configurations. The plant configurations incorporated various pollution control technologies, including selective catalytic reduction (SCR), selective noncatalytic reduction, ammonium sulfate injection for flue gas conditioning, and flue gas desulfurization (FGD). The particulate control devices included electrostatic precipitators (ESPs), a fabric filter (FF), and a venturi scrubber. The testing at these sites included the operation of Hg SCEMs before and after particulate control devices, in wet and dry stack conditions, and at high temperatures (343 degreesC). The results from these field measurements have provided data that have been evaluated to determine the reliability, variability, biases, and overall capability of Hg SCEMs fur monitoring mercury at coal-fired utilities. Even under the best conditions, operation of Hg SCEMs is by no means simple. Their operation at high-dust-condition locations (i.e., prior to the particulate control device), wet stack conditions, and high temperatures has tested the ruggedness of the Hg SCEMs. As a result of this testing, some of the critical factors affecting accuracy, precision, and reliability have been made apparent. The overall capability of Hg SCEMs to produce near-real-time data (data every 5 min) was also evaluated under these conditions. The duration of the tests ranged from short-term periods (1-2 h) up to 1 month. Evaluation of the data over the longer-term tests shows the range of mercury emissions due to the variability of mercury in the coal and the normal range of operating parameters for the unit. The range of data is important when control strategies and managing emission inventories are considered. EPA has not determined what type of monitoring or testing requirements will be included in the upcoming electric utility mercury regulations. There is, of course, interest in requiring the use of Hg SCEMs. However, our research to date has shown that commercially available Hg SCEMs are not capable of operating unattended to produce reliable and accurate emission data. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ N Dakota, Energy & Environm Res Ctr, Grand Forks, ND 58202 USA.
US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
Elect Power Res Inst, Palo Alto, CA 94303 USA.
RP Laudal, DL (reprint author), Univ N Dakota, Energy & Environm Res Ctr, POB 9018, Grand Forks, ND 58202 USA.
EM dlaudal@undeerc.org; brickett@netl.doe.gov; pchu@epri.com
NR 6
TC 31
Z9 35
U1 0
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-3820
J9 FUEL PROCESS TECHNOL
JI Fuel Process. Technol.
PD JUN 15
PY 2004
VL 85
IS 6-7
BP 501
EP 511
DI 10.1016/j.fuproc.2003.11.005
PG 11
WC Chemistry, Applied; Energy & Fuels; Engineering, Chemical
SC Chemistry; Energy & Fuels; Engineering
GA 815GQ
UT WOS:000221031200008
ER
PT J
AU O'Dowd, WJ
Hargis, RA
Granite, EJ
Pennline, HW
AF O'Dowd, WJ
Hargis, RA
Granite, EJ
Pennline, HW
TI Recent advances in mercury removal technology at the National Energy
Technology Laboratory
SO FUEL PROCESSING TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT Air Quality 3rd Conference on Mercury Trace Elements and Particulate
Matter
CY SEP 09-12, 2002
CL Arlington, VA
DE mercury; fly ash; pulverized coal-fired
ID MODELING SORBENT INJECTION; BAGHOUSE FILTERS; FLUE-GAS
AB The in-house research effort on mercury studies at the National Energy Technology Laboratory is an integrated, multi-task approach, including experimentation at both the laboratory-scale and the pilot-scale, as well as a numerical modeling effort to aid in interpretation of pilot-scale results. In the laboratory-scale work, novel sorbents and techniques for the removal of mercury from flue gas are being investigated using a small packed-bed reactor. The reactor system is used to screen novel sorbents for their capability to remove mercury from gas streams. The capacities of these novel sorbents are determined as a function of gas composition and temperature and are compared to results with commercially available activated carbons. In the pilot-scale work, an existing pilot unit has been characterized with respect to the distribution and fate of hazardous air pollutants in flue gas, with an emphasis on mercury. The pilot unit is a 500-lb/h (227-kg/h) pulverized coalfired (PCFC) combustion system that includes a furnace, air preheater, spray dryer, ductwork and a pulse-jet fabric filter. The investigations with this unit have entailed evaluation of various activated carbons and novel sorbents, as well as comparisons of various sampling techniques for the determination of total and speciated forms of mercury. The impact of various parameters (temperature, sorbent-to-mercury ratio, baghouse pressure drop) on the removal of mercury has been investigated. Additionally, a slipstream allows for the investigation of sorbent injection in a fly ash-free flue gas over a wide range of operating conditions, including residence time. A summary of the results for mercury measurement and control from the 500-lb/h (227-kg/h) PCFC combustion system will be presented, as well as the evaluation of methods for measurement of in duct removals using the slipstream. Finally, a discussion of the numerical modeling effort will be given. Published by Elsevier B.V.
C1 US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
RP O'Dowd, WJ (reprint author), US DOE, Natl Energy Technol Lab, POB 10940, Pittsburgh, PA 15236 USA.
EM odowd@netl.doe.gov
NR 13
TC 45
Z9 50
U1 1
U2 12
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-3820
J9 FUEL PROCESS TECHNOL
JI Fuel Process. Technol.
PD JUN 15
PY 2004
VL 85
IS 6-7
BP 533
EP 548
DI 10.1016/j.fuproc.2003.11.007
PG 16
WC Chemistry, Applied; Energy & Fuels; Engineering, Chemical
SC Chemistry; Energy & Fuels; Engineering
GA 815GQ
UT WOS:000221031200011
ER
PT J
AU Abbott, M
Einerson, J
Schuster, P
Susong, D
Taylor, HE
AF Abbott, M
Einerson, J
Schuster, P
Susong, D
Taylor, HE
TI Trace elements and common ions in southeastern Idaho snow: regional air
pollutant tracers for source area emissions
SO FUEL PROCESSING TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT Air Quality 3rd Conference on Mercury Trace Elements and Particulate
Matter
CY SEP 09-12, 2002
CL Arlington, VA
DE trace elements and common ions; snow; air pollutants
ID MERCURY
AB Snow samples were collected in southeastern Idaho over two winters to assess trace element and common ion concentrations in air pollutant fallout across the region. The objectives were to: (1) develop snow sampling and analysis techniques that produce accurate and ultra-low measurements of a broad suite of fallout elements, (2) identify the spatial and temporal trends of the fallout elements across the region, (3) determine if there are unique combinations of fallout elements that are characteristic to the major source areas in the region (source area profiles), and (4) use pattern recognition and multivariate statistical techniques (principal component analysis and classical least squares regression) to investigate source area apportionment of fallout concentrations measured at downwind locations where plumes from different source areas might mix. In the winter of 2000-2001, 250 snow samples were collected across the region over a 4-month period and analyzed in triplicate using inductively coupled plasma mass spectrometry (ICP MS) and ion chromatography (IC). Thirty nine trace elements and nine common ions were positively identified in most samples. The data were analyzed using pattern recognition tools in the software, Pirouette((R)) (Infometrix). These results showed a large crustal component (Al, Zn, Mn, Ba, and rare earth elements), an overwhelming contribution from phosphate processing facilities located outside Pocatello in the southern portion of the Eastern Snake River Plain, some changes in concentrations over time, and no obvious source area profiles (unique chemical signatures) other than at Pocatello. Concentrations near a major U.S. Department of Energy industrial complex oil the Idaho National Engineering and Environmental Laboratory (INEEL) were lower than those observed at major downwind communities. In the winter of 2001-2002, a new sampling design was tested and 135 additional samples collected to estimate pure emission profiles from the major source areas in the region. Classical least squares regression (CLS) was then used to source apportion these profiles at downwind mixing sites where plumes from the different source areas mixed. CLS performed reasonably well, predicting 36-58% of the total fallout concentrations measured at the mixing sites. (C) 2004 Elsevier B.V All rights reserved.
C1 Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA.
US Geol Survey, Natl Res Program, Boulder, CO 80303 USA.
US Geol Survey, Div Water Resources, Salt Lake City, UT 84119 USA.
RP Abbott, M (reprint author), Idaho Natl Engn Lab, POB 1625, Idaho Falls, ID 83415 USA.
EM bot@inel.gov
NR 9
TC 3
Z9 3
U1 1
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-3820
J9 FUEL PROCESS TECHNOL
JI Fuel Process. Technol.
PD JUN 15
PY 2004
VL 85
IS 6-7
BP 657
EP 671
DI 10.1016/j.fuproc.2003.11.013
PG 15
WC Chemistry, Applied; Energy & Fuels; Engineering, Chemical
SC Chemistry; Energy & Fuels; Engineering
GA 815GQ
UT WOS:000221031200021
ER
PT J
AU Anders, A
MacGill, RA
AF Anders, A
MacGill, RA
TI Asymmetric injection of cathodic arc plasma into a macroparticle filter
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID VACUUM-ARC; TRANSPORT; DEPOSITION; REMOVAL
AB The cathodic arc plasmas produced by cathode spots usually include macroparticles, which is undesirable for many applications. A common way of removing macroparticles is to use curved solenoid filters that guide the plasma from the source to the substrate. In this work, an arc source with a relatively small cathode is used, limiting the possible locations of plasma production. The relative position of cathodic arc source and macroparticle filter was systematically varied and the filtered plasma current was recorded. It was found that axis-symmetric plasma injection lead to maximum throughput only if an anode aperture was used, which limited the plasma to near-axis flow by scraping off plasma at larger angles to the axis. When the anode aperture was removed, more plasma could enter the filter. In this case, maximum filtered ion current was achieved when the plasma was injected off-axis; namely, offset in the direction where the filter is curved. Such behavior was anticipated because the plasma column in the filter is known to be shifted by ExB and centrifugal drift as well as by non-axis-symmetric components of the magnetic field in the filter entrance and exit plane. The data have implications for plasma transport variations caused by different spot locations on cathodes that are not small compared to the filter cross section. (C) 2004 American Institute of Physics.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Anders, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd,MS 53, Berkeley, CA 94720 USA.
RI Anders, Andre/B-8580-2009
OI Anders, Andre/0000-0002-5313-6505
NR 16
TC 2
Z9 2
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 JUN 15
PY 2004
VL 95
IS 12
BP 7602
EP 7606
DI 10.1063/1.1707200
PG 5
WC Physics, Applied
SC Physics
GA 826QK
UT WOS:000221843400007
ER
PT J
AU Zhao, YH
Zhu, YT
Liu, T
AF Zhao, YH
Zhu, YT
Liu, T
TI Mechanism of solid-state amorphization of Se induced by mechanical
milling
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID ABSORPTION-FINE-STRUCTURE; DIFFERENT GRAIN SIZES; SELENIUM; EXAFS;
SILICON; AMPLITUDE; MOLECULES; CLUSTERS; CRYSTAL; ALLOYS
AB In this work, the solid-state amorphization process of elemental trigonal Se via mechanical milling was studied. Trigonal Se has a unique crystal structure consisting of helical [-Se-](n) chains with strong intrachain covalent bonds and with weak interchain van der Waals bonds. It was found that the interchain coordination distance increased while the intrachain coordination distance decreased with increasing milling time. The crystalline Se transformed to the amorphous state once the interchain coordination distance reached a critical value. The intrachain coordination distance of amorphous Se continued to decrease with milling time, suggesting that molecular chain length decreased with milling time. Combined with the x-ray absorption near-edge structure calculations, it was concluded that the mechanical milling destroyed the interchain bonds of crystalline Se, resulting in the amorphization, while the intrachain bonds were strengthened during amorphization. The present results support a previous crystallite-destabilization model for solid-state amorphization. (C) 2004 American Institute of Physics.
C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
Chinese Acad Sci, Inst High Energy Phys, Synchrotron Radiat Lab, Beijing 100039, Peoples R China.
RP Zhao, YH (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
EM yzhu@lanl.gov
RI Zhu, Yuntian/B-3021-2008; Zhao, Yonghao/A-8521-2009; Lujan Center,
LANL/G-4896-2012
OI Zhu, Yuntian/0000-0002-5961-7422;
NR 39
TC 8
Z9 8
U1 1
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 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUN 15
PY 2004
VL 95
IS 12
BP 7674
EP 7680
DI 10.1063/1.1737478
PG 7
WC Physics, Applied
SC Physics
GA 826QK
UT WOS:000221843400018
ER
PT J
AU Enachescu, M
Carpick, RW
Ogletree, DF
Salmeron, M
AF Enachescu, M
Carpick, RW
Ogletree, DF
Salmeron, M
TI The role of contaminants in the variation of adhesion, friction, and
electrical conduction properties of carbide-coated scanning probe tips
and Pt(111) in ultrahigh vacuum
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID ATOMIC-FORCE MICROSCOPY; CONTACT; SURFACE; ORIGIN; SCALE; WEAR
AB Scanning probe microscopy was used to investigate the tribological properties of nanoscale tips in contact with a Pt(111) single-crystal surface under ultrahigh vacuum conditions. The tips were coated with a tungsten carbide film, which contained a significant fraction of oxygen. The electrically conductive tip made it possible to alternate between contact measurements and noncontact scanning tunneling microscopy. Several types of interfaces were found depending on the chemical state of the surfaces. The first type is characterized by strong irreversible adhesion followed by material transfer between tip and sample. Low adhesion and no material transfer characterize a second type of contact, which are associated with the presence of passivating adsorbates in both (full passivation) or in one of the two contacting surfaces (half-passivation). Half-passivated contacts in which the clean side is the Pt(111) sample gave rise to periodic stick-slip friction behavior with a period equal to the atomic lattice constant of the Pt(111) surface. Local electrical conductivity measurements show a clear correlation between electronic and friction properties, with ohmic behavior on clean regions of the Pt surface and semiconductor-like behavior on areas covered with adsorbates. (C) 2004 American Institute of Physics.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA.
RP Salmeron, M (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
EM salmeron@stm.lbl.gov
RI Enachescu, Marius/C-4963-2011; Ogletree, D Frank/D-9833-2016
OI Ogletree, D Frank/0000-0002-8159-0182
NR 24
TC 28
Z9 28
U1 1
U2 12
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUN 15
PY 2004
VL 95
IS 12
BP 7694
EP 7700
DI 10.1063/1.1738536
PG 7
WC Physics, Applied
SC Physics
GA 826QK
UT WOS:000221843400021
ER
PT J
AU Stoica, T
Vescan, L
Sutter, E
AF Stoica, T
Vescan, L
Sutter, E
TI Absence of island-island interaction during formation of isolated Ge
islands in small windows
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID SELECTIVE EPITAXIAL-GROWTH; QUANTUM DOTS; SI(001); LPCVD
AB Isolated Ge islands, i.e., islands not connected by a wetting layer can be obtained by selective epitaxial growth in voids of ultrathin oxides of thickness 1-2 nm. Voids of 30-600 nm size were created before epitaxy during a high temperature anneal of the ultrathin oxide. The formation of one island per window was investigated at 700 degreesC as a function of Ge thickness and void size. Islands nucleate mainly at the edge of the void and for this reason they have an anisotropic shape. In voids smaller than 300 nm only one island is nucleated. Islands form only in voids greater than a critical size (30-80 nm) which depends on the total amount of Ge deposited. We observe that height, width, and aspect ratio of isolated islands increase with void size for a given Ge thickness. A metastable state of Ge in small windows was observed. Moreover, the Si interdiffusion is strongly reduced with decreasing island size (i.e., with void size) reaching only similar to10% in comparison with similar to50% in islands on large areas. (C) 2004 American Institute of Physics.
C1 Forschungszentrum Julich, ISG, D-52425 Julich, Germany.
CNI Ctr Nanoelect Syst Informat Technol, D-52425 Julich, Germany.
Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
INCDFM, Bucharest, Romania.
RP Forschungszentrum Julich, ISG, Postfach 1913, D-52425 Julich, Germany.
EM t.stoica@fz-juelich.de
NR 16
TC 12
Z9 12
U1 1
U2 1
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 JUN 15
PY 2004
VL 95
IS 12
BP 7707
EP 7711
DI 10.1063/1.1736312
PG 5
WC Physics, Applied
SC Physics
GA 826QK
UT WOS:000221843400023
ER
PT J
AU Johnson, JA
Woodford, JB
Chen, XD
Andersson, J
Erdemir, A
Fenske, GR
AF Johnson, JA
Woodford, JB
Chen, XD
Andersson, J
Erdemir, A
Fenske, GR
TI Insights into "near-frictionless carbon films"
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID DIAMOND-LIKE CARBON; ABSORPTION FINE-STRUCTURE; AMORPHOUS-CARBON
AB A form of hydrogenated diamond-like-carbon, "near-frictionless carbon," developed at Argonne National Laboratory has been studied by several spectroscopic techniques to determine the hydrogen content and carbon bonding within the film. The techniques used include hydrogen forward scattering, ultraviolet Raman spectroscopy, Fourier transform infrared spectroscopy, near-edge x-ray absorption fine structure, and fluctuation microscopy. These complementary techniques reveal the different types of carbon bonding, such as sp(2) and sp(3), the medium-range order in the film, and its composition. (C) 2004 American Institute of Physics.
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
Cedarville Univ, Cedarville, OH 45314 USA.
Angstrom Lab, SE-75121 Uppsala, Sweden.
Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA.
RP Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM jaj@anl.gov
RI Andersson, Joakim/A-3017-2009; Johnson, Jacqueline/P-4844-2014
OI Andersson, Joakim/0000-0003-2991-1927; Johnson,
Jacqueline/0000-0003-0830-9275
NR 24
TC 26
Z9 26
U1 1
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUN 15
PY 2004
VL 95
IS 12
BP 7765
EP 7771
DI 10.1063/1.1739287
PG 7
WC Physics, Applied
SC Physics
GA 826QK
UT WOS:000221843400032
ER
PT J
AU Cheng, JY
Treacy, MMJ
Keblinski, PJ
Gibson, JM
AF Cheng, JY
Treacy, MMJ
Keblinski, PJ
Gibson, JM
TI Diffraction microscopy for disordered tetrahedral networks
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID AMORPHOUS-SILICON; GERMANIUM
AB X-ray and electron sources are extensively used to explore disordered structures. In the case of electron, small-angle diffraction can help to testify the argument about micro-crystallites in glassy states. Diffraction intensity has two types of variance in reciprocal space: radial and azimuthal. Previously, variance as a function of k was largely used to elucidate medium-range order in amorphous semiconductors. Here azimuthal variance is introduced. This variance reveals orientational order for possible crystallites. Furthermore, the oversampling method proposed here can change our view on amorphous structure. We find that a broad peak might not truly reflect one single crystallite. In fact, two reflections can be folded to yield one broad peak. In this paper, the issues are discussed with three examples: silica, silicon, and germanium. (C) 2004 American Institute of Physics.
C1 Rensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180 USA.
Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287 USA.
Rensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180 USA.
Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Cheng, JY (reprint author), Rensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180 USA.
EM chengj2@rpi.edu
RI Gibson, Murray/E-5855-2013
OI Gibson, Murray/0000-0002-0807-6224
NR 14
TC 9
Z9 9
U1 0
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUN 15
PY 2004
VL 95
IS 12
BP 7779
EP 7784
DI 10.1063/1.1711174
PG 6
WC Physics, Applied
SC Physics
GA 826QK
UT WOS:000221843400034
ER
PT J
AU Reagor, DW
Lee, SY
Li, Y
Jia, QX
AF Reagor, DW
Lee, SY
Li, Y
Jia, QX
TI Work function of the mixed-valent manganese perovskites
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID KELVIN PROBE; CHARGE
AB We have performed resistivity and work function measurements on a series of samples with Ln(0.7)D(0.3)MnO(3) composition, where Ln is a lanthanide (La, Pr, or Nd) and D is a nominally divalent ion (Sr, Ca, or Pb). The resistivity measurements are, within some small variation, in agreement with those previously reported for polycrystalline samples of similar composition. The measurement of a work function in air is often difficult to reproduce, mainly owing to the fact that it is a surface probe and can be modified significantly by attachment of contaminants from the atmosphere. Here we have obtained reproducible results that are slightly more stable than the reference metals used in the measurements. This required the introduction of a higher order correction to a common Kelvin probe experimental procedure. Another factor contributing to the high quality of the results is the low carrier density of the conducting oxides. This allows greater penetration of quasistatic electric fields. The work function results here are in overall agreement with previous photoemission work that determined an approximate electron binding energy. We find the best correlation of increased work function is to strain introduced by larger divalent ions and smaller Lanthanide ions. We conclude that the work function is dominated by electrons near the divalent site, and this is interpreted in terms of strain modifying the coulomb energy of the electronic states. (C) 2004 American Institute of Physics.
C1 Los Alamos Natl Lab, Supercond Technol Ctr, Los Alamos, NM 87544 USA.
RP Reagor, DW (reprint author), Los Alamos Natl Lab, Supercond Technol Ctr, POB 1663, Los Alamos, NM 87544 USA.
EM reagor@lanl.gov
RI Jia, Q. X./C-5194-2008
NR 13
TC 53
Z9 54
U1 1
U2 14
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUN 15
PY 2004
VL 95
IS 12
BP 7971
EP 7975
DI 10.1063/1.1737802
PG 5
WC Physics, Applied
SC Physics
GA 826QK
UT WOS:000221843400061
ER
PT J
AU Blomqvist, P
Krishnan, KM
McCready, DE
AF Blomqvist, P
Krishnan, KM
McCready, DE
TI Growth of exchange-biased MnPd/Fe bilayers
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID MAGNETIC ANISOTROPY; FILMS
AB The growth of exchange-biased MnPd/Fe bilayers has been investigated using x-ray diffraction. The bilayers were deposited on MgO(001) substrates in an ultrahigh-vacuum ion-beam sputter system. It was found that the orientation of the MnPd unit cell and the crystalline quality could be controlled as a function of the deposition temperature. Twinned a-axis oriented MnPd films are obtained below 100 degreesC while single-crystalline c-axis films are obtained above 450 degreesC. Intermediate temperatures yield a mixture of both orientations with a poor crystalline quality. Moreover, the interface quality depends strongly on the deposition temperature and also the order in which MnPd and Fe are deposited. The results clearly show that interdiffusion is initiated at the Fe/MnPd interface at a lower temperature as compared to the MnPd/Fe interface. The close relationship between the structural and magnetic properties is also discussed. (C) 2004 American Institute of Physics.
C1 Univ Washington, Seattle, WA 98195 USA.
Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA.
RP Blomqvist, P (reprint author), Univ Washington, Seattle, WA 98195 USA.
EM kannanmk@u.washington.edu
NR 13
TC 18
Z9 18
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 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUN 15
PY 2004
VL 95
IS 12
BP 8019
EP 8022
DI 10.1063/1.1713023
PG 4
WC Physics, Applied
SC Physics
GA 826QK
UT WOS:000221843400069
ER
PT J
AU White, CW
Withrow, SP
Williams, JM
Budai, JD
Meldrum, A
Sorge, KD
Thompson, JR
Boatner, LA
AF White, CW
Withrow, SP
Williams, JM
Budai, JD
Meldrum, A
Sorge, KD
Thompson, JR
Boatner, LA
TI FePt nanoparticles formed in Al2O3 by ion beam synthesis: Annealing
environment effects
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID MAGNETIC-ANISOTROPY; THIN-FILMS; IMPLANTATION; IRON; MGO(001); SAPPHIRE
AB The properties of FePt nanoparticles formed by the implantation of Fe+Pt into c-axis-oriented Al2O3 single crystals followed by thermal annealing are shown to be strongly dependent on the annealing environment. Annealing in a reducing environment (flowing Ar+4% H-2, or ultrahigh vacuum) gives rise to ferromagnetic FePt nanoparticles with the L1(0) structure and very high magnetic coercivity (greater than 20 kOe). FePt alloy formation does not occur during annealing in an oxidizing environment. Instead, the implanted Pt precipitates out forming oriented Pt nanoparticles and the implanted Fe redistributes with similar to40% segregating to the surface where it forms epitaxial alpha-Fe2O3 precipitates at the surface; the remainder of the implanted Fe remains in the bulk, most likely in solid solution in the matrix. Results obtained by sequential annealing of Fe+Pt implanted samples in reducing (oxidizing) environments followed by annealing in an oxidizing (reducing) environment suggest that equilibrium, rather than kinetic, effects are responsible for the observed microstructures. (C) 2004 American Institute of Physics.
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
BronteK Delta Corp, Radford, VA 24141 USA.
Univ Alberta, Edmonton, AB T6G 2M7, Canada.
Univ Tennessee, Knoxville, TN 37996 USA.
RP White, CW (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM whitecw@solid.ssd.ornl.gov
RI Boatner, Lynn/I-6428-2013; Budai, John/R-9276-2016
OI Boatner, Lynn/0000-0002-0235-7594; Budai, John/0000-0002-7444-1306
NR 23
TC 14
Z9 14
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 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUN 15
PY 2004
VL 95
IS 12
BP 8160
EP 8166
DI 10.1063/1.1737806
PG 7
WC Physics, Applied
SC Physics
GA 826QK
UT WOS:000221843400094
ER
PT J
AU Wang, CM
Zhang, Y
Shutthanandan, V
Thevuthasan, S
Duscher, G
AF Wang, CM
Zhang, Y
Shutthanandan, V
Thevuthasan, S
Duscher, G
TI Microstructure of precipitated au nanoclusters in TiO2
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID ATOMIC-FORCE MICROSCOPY; ION-IMPLANTED SILICA; OPTICAL-PROPERTIES; GOLD
NANOCLUSTERS; FUSED-SILICA; COLLOIDAL AU; TIO2(110); NANOCRYSTALS;
GROWTH; MGO
AB Gold nanoclusters dispersed in TiO2(110) single crystal have been formed by 2 MeV Au2+ implantation to an ion fluence of 6.0x10(16) cm(-2) at 300 and 975 K followed by annealing at 1275 K for 10 h. The morphological features, size, crystallographic orientation of the Au nanoclusters with respect to the TiO2 matrix, and the interface structure between the Au nanoclusters and TiO2 have been investigated using conventional transmission electron microscopy (TEM), high-resolution TEM (HRTEM), electron diffractions, and high angle annular dark-field (HAADF) imaging in an aberration corrected scanning TEM (STEM). STEM-HAADF image directly reveals that Au atoms are in the substitutional Ti atomic columns in the TiO2 lattice prior to nucleation of Au cluster. An Atomic structural model of the interface between Au and TiO2 was established based on HRTEM and image simulations. The precipitated Au clusters show typical (111) twins. Au clusters are faceted along Au{112}, Au{111}, and Au{220} planes. Two types of orientation relationship can be identified, Au<110>//TiO2[001] and Au{111}//TiO2(200), and Au<110>//TiO2[001] and Au{111}//TiO2(110). These orientation relationships as well as the {111} twining feature in Au clusters are similarly observed for Au clusters grown on stoichiometric TiO2(110) free surface, indicating that the presently established orientation corresponds to the lowest interfacial energy for Au contacted with TiO2. This is essential for understanding the catalytic properties of Au supported on TiO2. (C) 2004 American Institute of Physics.
C1 Pacific NW Natl Lab, Richland, WA 99352 USA.
N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27607 USA.
Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA.
RP Wang, CM (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA.
EM chongmin.wang@pnl.gov
RI Duscher, Gerd/G-1730-2014
OI Duscher, Gerd/0000-0002-2039-548X
NR 48
TC 16
Z9 16
U1 3
U2 24
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUN 15
PY 2004
VL 95
IS 12
BP 8185
EP 8193
DI 10.1063/1.1748859
PG 9
WC Physics, Applied
SC Physics
GA 826QK
UT WOS:000221843400098
ER
PT J
AU Chang, KC
Porter, LM
Bentley, J
Lu, CY
Cooper, J
AF Chang, KC
Porter, LM
Bentley, J
Lu, CY
Cooper, J
TI Electrical, structural, and chemical analysis of silicon carbide-based
metal-oxide-semiconductor field-effect-transistors
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID ENERGY-LOSS SPECTROSCOPY; INTERFACE STATES; DIGITAL-FILTERS;
TRACE-ELEMENTS; MOS DEVICES; OPTIMIZATION; NITRIDATION; CHANNEL;
DEFECTS; DENSITY
AB In this study we investigated the morphology and interfacial chemistry of (0001) 4H-SiC-based metal-oxide-semiconductor field-effect transistors (MOSFETs) as a function of post-oxidation annealing in nitric oxide (NO) following wet oxidation. Energy-filtered transmission electron microscopy analyses showed enhanced C/Si concentrations (up to 13%) at distinct locations along the SiO2/SiC interface in the MOSFETs that were not annealed in NO. In contrast, regions of enhanced C/Si concentration were not detected in the MOSFETs that were annealed in NO; instead, these samples showed a trace amount of interfacial N. The introduction of N may therefore be associated with a reduction of C in these samples and may contribute to the higher channel mobility (similar to38 cm(2)/V s) in the samples annealed in NO relative to the samples that were not annealed in NO (similar to9 cm(2)/V s). Rough SiO2/4H-SiC interfaces and nonuniform oxide thickness were observed on both the NO- and the non-NO-annealed samples. The rough interfaces shown in the transmission electron microscopy bright field images may also be an important factor limiting the channel mobility in SiC-based MOSFETs. (C) 2004 American Institute of Physics.
C1 Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA.
Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA.
Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA.
RP Chang, KC (reprint author), Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA.
EM lporter@andrew.cmu.edu
RI Porter, Lisa/C-9729-2010
OI Porter, Lisa/0000-0002-0970-0420
NR 23
TC 37
Z9 37
U1 1
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 JUN 15
PY 2004
VL 95
IS 12
BP 8252
EP 8257
DI 10.1063/1.1737801
PG 6
WC Physics, Applied
SC Physics
GA 826QK
UT WOS:000221843400107
ER
PT J
AU Elmer, JW
Palmer, TA
Babu, SS
Zhang, W
DebRoy, T
AF Elmer, JW
Palmer, TA
Babu, SS
Zhang, W
DebRoy, T
TI Phase transformation dynamics during welding of Ti-6Al-4V
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID X-RAY-DIFFRACTION; IN-SITU OBSERVATIONS; HEAT-AFFECTED ZONE; STEEL ARC
WELDS; ALLOY; SOLIDIFICATION; EVOLUTION; KINETICS
AB In situ time-resolved x-ray diffraction (TRXRD) experiments were used to track the evolution of the alpha-->beta-->L-->beta-->alpha/alpha(') phase transformation sequence during gas tungsten arc welding of Ti-6Al-4V. Synchrotron radiation was employed for the in situ measurements in both the fusion zone (FZ) and the heat-affected zone (HAZ) of the weld, providing information about transformation rates under rapid heating and cooling conditions. The TRXRD data were coupled with the results of computational thermodynamic predictions of phase equilibria, and numerical modeling of the weld temperatures. The results show that significant superheat is required above the beta transus temperature to complete the alpha-->beta transformation during weld heating, and that the amount of superheat decreases with distance from the center of the weld where the heating rates are lower. A Johnson-Mehl-Avrami phase transformation model yielded a set of kinetic parameters for the prediction of the alpha-->beta phase transformation during weld heating. Corresponding TRXRD measurements were made during weld cooling. In the HAZ, the beta-->alpha transformation during weld cooling was shown to initiate at the beta transus temperature and terminate below the Ms temperature, resulting in a microstructure containing a substantial fraction of alpha(') martensite. In the FZ, the beta-->alpha transformation during weld cooling was shown to initiate below the Ms temperature, and to completely transform the microstructure to alpha(') martensite. (C) 2004 American Institute of Physics.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
Penn State Univ, University Pk, PA 16802 USA.
RP Elmer, JW (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM elmer1@llnl.gov
RI Babu, Sudarsanam/D-1694-2010; DebRoy, Tarasankar/A-2106-2010; Zhang,
Wei/B-9471-2013
OI Babu, Sudarsanam/0000-0002-3531-2579;
NR 28
TC 75
Z9 84
U1 6
U2 57
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUN 15
PY 2004
VL 95
IS 12
BP 8327
EP 8339
DI 10.1063/1.1737476
PG 13
WC Physics, Applied
SC Physics
GA 826QK
UT WOS:000221843400119
ER
PT J
AU Li, L
Weidner, DJ
Chen, JH
Vaughan, MT
Davis, M
Durham, WB
AF Li, L
Weidner, DJ
Chen, JH
Vaughan, MT
Davis, M
Durham, WB
TI X-ray strain analysis at high pressure: Effect of plastic deformation in
MgO
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID POLYCRYSTALLINE MGO; LATTICE STRAINS; LOWER MANTLE; GPA; ELASTICITY;
ANISOTROPY; EVOLUTION; CRYSTALS; STRESSES
AB The factors that control the stress-strain state of a polycrystal under differential stress depend on whether or not plastic deformation has occurred in the solid. If not, then the elastic properties with the constraints of the Reuss-Voigt bounds limit this relationship. If plastic deformation becomes important then the Taylor and Sachs models are relevant. These models assume that the plastic process is enabled by dislocation flow on specific lattice planes and specific Burger's vectors. Then, the relationship between stress and strain is controlled by the orientation of an individual grain with respect to the stress field, von Mises criterion, and the critical resolved stress on the dislocation that is necessary for flow. We use a self-consistent model to predict the flow stress during the plastic deformation of polycrystalline MgO with a slip system of {110}<1 (1) over bar0>, {111}<1 (1) over bar0>, and {100}x<011> at different critical resolved shear stress ratios for the different slip systems. The prediction of the models is correlated with the results of x-ray diffraction measurements. Uniaxial deformation experiments on polycrystalline and single-crystal MgO samples were conducted in situ using white x-ray diffraction with a multielement detector and multianvil high-pressure apparatus at a pressure up to 6 GPa and a temperature of 500 degreesC. A deformation DIA was used to generate pressure and control at a constant deformation rate. Elastic strains and plastic strains were monitored using x-ray diffraction spectra and x-ray imaging techniques, respectively. The correlation of the data and models suggests that the plastic models need to be used to describe the stress-strain observations with the presence of plasticity, while the Reuss and Voigt models are appropriate for the elastic region of deformation, before the onset of plastic deformation. The similarity of elastic strains among different lattice planes suggests that the {111} slip system is the most significant slip system in MgO at high pressure and high temperature. (C) 2004 American Institute of Physics.
C1 SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA.
SUNY Stony Brook, Inst Mineral Phys, Stony Brook, NY 11794 USA.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Li, L (reprint author), SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA.
EM lilli@notes.cc.sunysb.edu
NR 41
TC 54
Z9 54
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 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUN 15
PY 2004
VL 95
IS 12
BP 8357
EP 8365
DI 10.1063/1.1738532
PG 9
WC Physics, Applied
SC Physics
GA 826QK
UT WOS:000221843400122
ER
PT J
AU Kucheyev, SO
Felter, TE
AF Kucheyev, SO
Felter, TE
TI Structural disorder produced in KH2PO4 by light-ion bombardment
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID LASER; CRYSTALS/; NH4H2PO4; DAMAGE
AB We study structural disorder produced in tetragonal KH2PO4 (KDP) single crystals at room temperature by irradiation with MeV light ions. Results show that electronic energy loss plays a major role in the production of lattice defects in KDP. The effective diameters of ion tracks depend superlinearly on the electronic stopping power of energetic light ions. Structural lattice disorder is also accompanied by the formation of a network of cracks and blisters on the sample surface. Such irradiation-induced cracking and blistering typically evolve over extended periods of time (e.g., days) after bombardment and are strongly affected by ion irradiation and sample storage conditions. (C) 2004 American Institute of Physics.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Kucheyev, SO (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM kucheyev1@llnl.gov
NR 17
TC 8
Z9 8
U1 1
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 JUN 15
PY 2004
VL 95
IS 12
BP 8475
EP 8477
DI 10.1063/1.1745117
PG 3
WC Physics, Applied
SC Physics
GA 826QK
UT WOS:000221843400140
ER
PT J
AU Stack, AG
Eggleston, CM
Engelhard, MH
AF Stack, AG
Eggleston, CM
Engelhard, MH
TI Reaction of hydroquinone with hematite I. Study of adsorption by
electrochemical-scanning tunneling microscopy and X-ray photoelectron
spectroscopy
SO JOURNAL OF COLLOID AND INTERFACE SCIENCE
LA English
DT Article
DE hydroquinone; hematite; alpha-Fe2O3; reductive dissolution; biological
electron transfer
ID EXTRACELLULAR ELECTRON-TRANSFER; NATURAL ATTENUATION PROCESSES; OIL
SPILL SITE; SEMICONDUCTOR ELECTRODES; IRON-OXIDES; ACETONITRILE
SOLUTIONS; EC-STM; REDUCTION; SURFACES; CHEMISORPTION
AB The reaction of hematite with quinones and the quinone moieties of larger molecules may be an important factor in limiting the rate of reductive dissolution, especially by iron-reducing bacteria. Here, the electrochemical and physical properties of hydroquinone adsorbed on hematite surfaces at pH 2.5-3 were investigated with cyclic voltammetry (CV), electrochemical-scanning tunneling microscopy (EC-STM), and X-ray photoelectron spectroscopy (XPS). An oxidation peak for hydroquinone was observed in the CV experiments, as well as (photo)reduction of iron and decomposition of the solvent. The EC-STM results indicate that hydroquinone sometimes forms an ordered monolayer with similar to1.1 QH(2)/nm(2), but can be fairly disordered (especially when viewed at larger scales). XPS results indicate that hydroquinone and benzoquinone are retained at the interface in increasing amounts as the reaction proceeds, but reduced iron is not observed. These results suggest that quinones do not adsorb by an inner-sphere complex where adsorbate-surface interactions determine the adsorbate surface structure, but rather in an outer-sphere complex where interactions among the adsorbate molecules dominate. (C) 2004 Elsevier Inc. All rights reserved.
C1 Univ Wyoming, Dept Geol & Geophys, Laramie, WY 82071 USA.
Pacific NW Natl Lab, William R Wiley Environm Mol Sci Lab, Richland, WA 99352 USA.
RP Stack, AG (reprint author), Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 USA.
EM astack@ucdavis.edu
RI Engelhard, Mark/F-1317-2010; Stack, Andrew/D-2580-2013;
OI Stack, Andrew/0000-0003-4355-3679; Engelhard, Mark/0000-0002-5543-0812
NR 51
TC 20
Z9 20
U1 1
U2 25
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9797
J9 J COLLOID INTERF SCI
JI J. Colloid Interface Sci.
PD JUN 15
PY 2004
VL 274
IS 2
BP 433
EP 441
DI 10.1016/j.jcis.2003.12.026
PG 9
WC Chemistry, Physical
SC Chemistry
GA 823IC
UT WOS:000221603100009
PM 15144814
ER
PT J
AU Stack, AG
Rosso, KM
Smith, DMA
Eggleston, CM
AF Stack, AG
Rosso, KM
Smith, DMA
Eggleston, CM
TI Reaction of hydroquinone with hematite II. Calculated electron-transfer
rates and comparison to the reductive dissolution rate
SO JOURNAL OF COLLOID AND INTERFACE SCIENCE
LA English
DT Article
DE hydroquinone; hematite; alpha-Fe2O3; biological electron transfer;
Marcus theory
ID CHARGE-TRANSFER PROCESSES; AB-INITIO; IRON-OXIDES; FREE-ENERGY;
REORGANIZATION; ALPHA-FE2O3; EXCHANGE; SURFACES; QUINONES; DENSITY
AB The rate of reaction of hematite with quinones and the quinone moieties of larger molecules may be an important factor in limiting the rate of reductive dissolution of hematite, especially by iron-reducing bacteria. It is possible that the rate. of reductive dissolution of hematite in the presence of excess hydroquinone at pH 2.5 may be limited by the electron-transfer rate. Here, a reductive dissolution rate was measured and compared to electron-transfer rates calculated using Marcus theory. An experimental rate constant was measured at 9.5 x 10(-6) s(-1) and the reaction order with respect to the hematite concentration was found to be 1.1 Both the dissolution rate and the reaction order of hematite concentration compare well with previous measurements. Of the Marcus theory calculations, the inner-sphere part of the reorganization energy and the electronic coupling matrix element for hydroquinone self-exchange electron transfer are calculated using ab initio methods. The second order self-exchange rate constant was calculated to be 1.3 x 10(7) M-1 s(-1), which compares well with experimental measurements. Using previously published data calculated for hexaquairon(III)/(11), the calculated electron-transfer rate for the cross reaction with hydroquinone also compares well to experimental measurements. A hypothetical reductive dissolution rate is calculated using the first-order electron-transfer rate constant and the concentration of total adsorbed quinone. Three different models of the hematite surface are used as well as multiple estimates for the reduction potential, the surface charge, and the adsorption density of hydroquinone. No calculated dissolution rate is less than five orders of magnitude faster than the experimentally measured one. (C) 2004 Elsevier Inc. All rights reserved.
C1 Univ Wyoming, Dept Geol & Geophys, Laramie, WY 82071 USA.
Pacific NW Natl Lab, William R Wiley Environm Mol Sci Lab, Richland, WA 99352 USA.
Whitman Coll, Dept Phys, Walla Walla, WA 99362 USA.
RP Stack, AG (reprint author), Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 USA.
EM astack@ucdavis.edu
RI Stack, Andrew/D-2580-2013
OI Stack, Andrew/0000-0003-4355-3679
NR 55
TC 14
Z9 14
U1 2
U2 17
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9797
J9 J COLLOID INTERF SCI
JI J. Colloid Interface Sci.
PD JUN 15
PY 2004
VL 274
IS 2
BP 442
EP 450
DI 10.1016/j.jcis.2004.01.001
PG 9
WC Chemistry, Physical
SC Chemistry
GA 823IC
UT WOS:000221603100010
PM 15144815
ER
PT J
AU Zhao, HT
Nagy, KL
AF Zhao, HT
Nagy, KL
TI Dodecyl sulfate-hydrotalcite nanocomposites for trapping chlorinated
organic pollutants in water
SO JOURNAL OF COLLOID AND INTERFACE SCIENCE
LA English
DT Article
DE layered double hydroxide; hydrotalcite; dodecyl sulfate; anionic
surfactant; sorption; organic pollutants; trichloroethylene;
tetrachloroethylene; intercalation; organoclay
ID LAYERED DOUBLE HYDROXIDES; DOUBLE-METAL HYDROXIDE; ANION-EXCHANGE;
PHYSICOCHEMICAL PROPERTIES; SORPTION; ADSORPTION; CLAYS; SURFACTANTS;
SMECTITE; ORGANOHYDROTALCITES
AB A series of hybrid organic-inorganic nanocomposite materials was synthesized by three different procedures using sodium dodecyl sulfate (DDS) and magnesium-aluminum layered double hydroxide (Mg/Al LDH with a Mg/Al molar ratio of 2 to 5). Both the pH of the exchange medium (6.5 to 10) and the Mg/Al molar ratio of the LDH affected the basal spacing, the content of DDS retained and the orientation of the DDS chains within the interlamellar space. For LDH with higher charge density (Mg/Al = 2 and 3), DDS molecules likely formed a perpendicular monolayer within the LDH interlayer and the solution pH had little effect on the basal spacing, with a mean and standard deviation of 25.5 +/- 0.4 Angstrom. However, for LDH with lower charge density (Mg/Al = 4 and 5), DDS molecules more likely formed an interpenetrating bilayer, and the basal spacing significantly increased with increasing pH, with a mean and standard deviation of 32.7 +/- 5.2 Angstrom. Sorption of trichloroethylene and tetrachloroethylene by DDS-LDH varied with synthesis conditions, LDH type and DDS configuration in the interlayer. DDS-Mg3Al-LDH had the highest affinity for both trichloroethylene and tetrachloroethylene in water, either comparable to or as much as four times higher than other clay-derived sorbents, followed by DDS-Mg4Al-LDH and DDS-Mg5Al-LDH. DDS-Mg2Al-LDH had the lowest sorption affinity although the highest amount of DDS. The pH of the exchange solution also affected the amount of DDS retained by the LDH as well as the sorption efficiency. Mg3Al-LDH has a charge equivalent area of 32.2 Angstrom(2)/charge, which allows the formation of optimal DDS configuration within its interlayer, thus resulting in the highest affinity for the chlorinated compounds. The DDS-Mg/Al-LDHs can be easily synthesized either ex situ or in situ at low temperature, indicating the feasibility of practical applications. The results obtained by controlling the synthesis procedure suggest that different arrangements of DDS molecules in the LDH interlayers can be obtained and optimized for the sorption of specific sorbates. (C) 2004 Elsevier Inc. All rights reserved.
C1 Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA.
RP Zhao, HT (reprint author), Sandia Natl Labs, MS 0779, Albuquerque, NM 87111 USA.
EM hzhao@sandia.gov
RI ZHAO, HONGTING/B-1470-2010
NR 56
TC 138
Z9 144
U1 7
U2 46
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9797
J9 J COLLOID INTERF SCI
JI J. Colloid Interface Sci.
PD JUN 15
PY 2004
VL 274
IS 2
BP 613
EP 624
DI 10.1016/j.jcis.2004.03.055
PG 12
WC Chemistry, Physical
SC Chemistry
GA 823IC
UT WOS:000221603100032
PM 15144837
ER
PT J
AU Pakula, K
Bozek, R
Baranowski, JM
Jasinski, J
Liliental-Weber, Z
AF Pakula, K
Bozek, R
Baranowski, JM
Jasinski, J
Liliental-Weber, Z
TI Reduction of dislocation density in heteroepitaxial GaN: role of SiH4
treatment
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article
DE atomic force microscopy; dislocations; transmission electron microscopy;
lateral growth; metalorganic vapor phase epitaxy; gallium nitride
ID LIGHT-EMITTING-DIODES; VAPOR-PHASE EPITAXY; ULTRAVIOLET; SURFACTANT;
SUBSTRATE; LAYERS
AB TEM and AFM data show that a significant reduction of threading dislocations in heteroepitaxial GaN/Al2O3 grown by MOCVD has been achieved. The reduction has been obtained by growth interruption followed by annealing in silane (SiH4). Density of threading dislocations in the GaN layer above the silane-exposed surface decreased to 5 x 10(7) cm(-2) in comparison to 10(9) cm(-2) in the layer below this surface. TEM data showed the existence of pyramidal pits at the silane-exposed surface. They were overgrown by the subsequent GaN layer. The presence of these pits indicates that the GaN surface was selectively etched during the silane flow. These pits were sites where dislocations drastically changed propagation direction from parallel to the c-axis to horizontal. Horizontal propagation of dislocations above the surface treated by silane (where formation of SiN was expected) suggests that the GaN layer in this region was grown in the lateral epitaxial overgrowth mode. EDX measurements performed at the interface between the SiH4-treated GaN layer and the subsequently grown GaN did not show any presence of Si. Therefore, it is believed that the dislocation reduction is related to the lateral overgrowth above the pits and not to the formation of a SiN interlayer. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Univ Warsaw, Inst Expt Phys, Hoza 69, PL-00681 Warsaw, Poland.
EM krzysztof.pakula@fuw.edu.pl
RI Liliental-Weber, Zuzanna/H-8006-2012
NR 15
TC 58
Z9 58
U1 2
U2 24
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-0248
EI 1873-5002
J9 J CRYST GROWTH
JI J. Cryst. Growth
PD JUN 15
PY 2004
VL 267
IS 1-2
BP 1
EP 7
DI 10.1016/j.jcrysgro.2004.03.020
PG 7
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA 832SF
UT WOS:000222286600001
ER
PT J
AU Hageman, PR
Schaff, WJ
Janinski, J
Liliental-Weber, Z
AF Hageman, PR
Schaff, WJ
Janinski, J
Liliental-Weber, Z
TI n-type doping of wurtzite GaN with germanium grown with plasma-assisted
molecular beam epitaxy
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article
DE doping; molecular beam epitaxy; gallium compounds; semiconducting
gallium compounds
ID SI; SILICON
AB In this paper, a study of germanium as n-type dopant in plasma-assisted molecular beam epitaxy of GaN is presented. The germanium incorporation is studied as a function of the germanium effusion cell temperature and growth temperature of the GaN layer. The influence of the doping concentration on the electrical, structural and morphological properties of the GaN layer will be studied using Hall and high-resolution X-ray measurements (rocking curve and theta - 2theta) measurements. Optical examination of the surface morphology was performed with differential interference contrast microscopy, a scanning electron microscope or transmission electron microscope. Doping of GaN with germanium results in crack-free n-type material up to values of n = 4 x 10(20) cm(-3) with a 1:1 relation between carrier concentration and vapor pressure. Even higher carrier concentrations can be obtained, n = 3.6 x 10(21) cm(-3), but there are indications that the solubility limit of germanium in GaN of these layers is exceeded, thereby deteriorating the morphology of the surface of the layer and changing the electrical and structural properties. TEM measurements reveal that secondary phases are indeed formed. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ Nijmegen, Fac Sci Math & Comp Sci, Dept Expt Solid State Phys 3, NL-6525 ED Nijmegen, Netherlands.
Cornell Univ, Dept Elect & Comp Engn, Ithaca, NY 14853 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Hageman, PR (reprint author), Univ Nijmegen, Fac Sci Math & Comp Sci, Dept Expt Solid State Phys 3, Toernooiveld 1, NL-6525 ED Nijmegen, Netherlands.
EM paulh@sci.kun.nl
RI Hageman, Paul/D-4609-2012; Liliental-Weber, Zuzanna/H-8006-2012
NR 13
TC 26
Z9 26
U1 0
U2 7
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 JUN 15
PY 2004
VL 267
IS 1-2
BP 123
EP 128
DI 10.1016/j.jcrysgro.200403.024
PG 6
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA 832SF
UT WOS:000222286600017
ER
PT J
AU Gary, SP
Borovsky, JE
AF Gary, SP
Borovsky, JE
TI Alfven-cyclotron fluctuations: Linear Vlasov theory
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE Alfven waves; Landau damping; cyclotron damping; solar wind
ID LOW-FREQUENCY WAVES; SOLAR-WIND; MAGNETOHYDRODYNAMIC TURBULENCE; KINETIC
DISSIPATION; SPECTRA; DRIVEN; RANGE; SIMULATIONS; DISPERSION; DYNAMICS
AB Linear Vlasov dispersion theory for a homogeneous, collisionless electron-proton plasma with Maxwellian velocity distributions is used to examine the damping of Alfven-cyclotron fluctuations. Fluctuations of sufficiently long wavelength are essentially undamped, but as k(parallel to), the wave vector component parallel to the background magnetic field B-o, reaches a characteristic dissipation value k(d), the protons become cyclotron resonant and damping begins abruptly. For proton cyclotron damping, k(d)c/omega(p) similar to 1 for 10(-3) less than or similar to beta(p) less than or similar to 10(-1), where beta(p) = 8pin(p)k(B)T(p)/B-o(2) and omega(p)/c is the proton inertial length. At k(parallel to) < k(d), m(e)/m(p) < beta(e), and beta(p) less than or similar to 0.10 the electron Landau resonance becomes the primary contributor to fluctuation dissipation, yielding a damping rate that scales as omega(r)rootbeta(e) (k(perpendicular to)c/omega(p))(2), where omega(r) is the real frequency and k(perpendicular to) is the wave vector component perpendicular to B-o. As beta(p) increases from 0.10 to 10, the proton Landau resonance makes an increasing contribution to damping of these waves at k(parallel to) < k(d) and 0 degrees < theta < 30 degrees, where theta = arccos(<(k)over cap> . (B) over cap (o)). The maximum damping rate due to the proton Landau resonance scales approximately as beta(p)(kc/omega(p))(2) over 0.50 less than or equal to beta(p) less than or equal to 10. Both magnetic transit time damping and electric Landau damping may contribute to Landau resonant dissipation; in the electron Landau resonance regime the former is important only at propagation almost parallel to Bo, whereas proton transit time damping can be relatively important at both quasi-parallel and quasi-perpendicular propagation of Alfven-cyclotron fluctuations.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Los Alamos Natl Lab, MS D466, Los Alamos, NM 87545 USA.
EM pgary@lanl.gov; jborovsky@lanl.gov
NR 30
TC 69
Z9 69
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD JUN 15
PY 2004
VL 109
IS A6
AR A06105
DI 10.1029/2004JA010399
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 833HD
UT WOS:000222326800005
ER
PT J
AU Lu, ZP
Liu, CT
AF Lu, ZP
Liu, CT
TI Role of minor alloying additions in formation of bulk metallic glasses:
A review
SO JOURNAL OF MATERIALS SCIENCE
LA English
DT Review
ID SUPERCOOLED LIQUID REGION; SOFT-MAGNETIC PROPERTIES; SCATTERING AXS
METHOD; ZR AMORPHOUS-ALLOYS; B-SI ALLOYS; FORMING ABILITY;
THERMAL-STABILITY; MECHANICAL-PROPERTIES; CRYSTALLIZATION BEHAVIOR;
OXYGEN IMPURITY
AB Minor alloying addition or microalloying technology has already shown dramatic effects on glass formation and thermal stability of bulk metallic glasses (BMGs). This paper intends to provide a comprehensive review of recent developments of this technology in the field of BMGs. The beneficial effects of minor alloying additions on the glass formation and the thermal stability of BMGs will be summarized and analyzed. In addition, principles and guidelines for future application of this technology will also be proposed. (C) 2004 Kluwer Academic Publishers.
C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA.
RP Lu, ZP (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA.
EM luzp@ornl.gov
RI Lu, Zhao-Ping/A-2718-2009
NR 60
TC 181
Z9 189
U1 11
U2 77
PU KLUWER ACADEMIC PUBL
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0022-2461
J9 J MATER SCI
JI J. Mater. Sci.
PD JUN 15
PY 2004
VL 39
IS 12
BP 3965
EP 3974
DI 10.1023/B:JMSC.0000031478.73621.64
PG 10
WC Materials Science, Multidisciplinary
SC Materials Science
GA 827YT
UT WOS:000221940300014
ER
PT J
AU Bei, H
Pharr, GM
George, EP
AF Bei, H
Pharr, GM
George, EP
TI A review of directionally solidified intermetallic composites for
high-temperature structural applications
SO JOURNAL OF MATERIALS SCIENCE
LA English
DT Review
ID NICKEL-BASE SUPERALLOY; IN-SITU COMPOSITES; EUTECTIC CR-CR3SI ALLOYS;
MECHANICAL-PROPERTIES; FORCED-CONVECTION; NIAL-MO; MICROSTRUCTURE;
LAMELLAR; BEHAVIOR; GROWTH
AB Alloys based on intermetallics have been considered for high temperature structural applications. However, many of these alloys suffer from intrinsic brittleness and low fracture toughness at ambient temperature. Therefore, ductile-phase-toughened intermetallic composites are being investigated as a means to improve the fracture toughness. A subset of this class of materials is in-situ composites produced by directional solidification of intermetallic eutectics. In this paper, we review recent developments related to the processing and properties of these composites. (C) 2004 Kluwer Academic Publishers.
C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA.
RP George, EP (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM georgeep@ornl.gov
RI George, Easo/L-5434-2014;
OI Bei, Hongbin/0000-0003-0283-7990
NR 91
TC 24
Z9 24
U1 2
U2 42
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0022-2461
EI 1573-4803
J9 J MATER SCI
JI J. Mater. Sci.
PD JUN 15
PY 2004
VL 39
IS 12
BP 3975
EP 3984
DI 10.1023/B:JMSC.0000031479.32138.84
PG 10
WC Materials Science, Multidisciplinary
SC Materials Science
GA 827YT
UT WOS:000221940300015
ER
PT J
AU Chialvo, AA
Simonson, JM
AF Chialvo, AA
Simonson, JM
TI The effect of salt concentration on the structure of water in CaCl2
aqueous solutions
SO JOURNAL OF MOLECULAR LIQUIDS
LA English
DT Article
DE salt concentration; aqueous solution; CaCl2; water structure
ID TEMPERATURE ELECTROLYTE-SOLUTIONS; PAIR-CORRELATION-FUNCTIONS; MOLECULAR
SIMULATION; NEUTRON-SCATTERING; HYDRATION SHELL; X-RAY; DIFFRACTION;
SOLVATION; CHLORIDE; PRESSURE
AB The microstructure of water in aqueous CaCl2 solutions over a wide range of salt concentrations at T = 298 K is characterized by molecular simulation to determine the effect of the ions on the structure of water. The structural results are subsequently used to test the validity of a recently proposed hypothesis, which equates the ion effect to a pressure or temperature effect on the structure of water in the aqueous solution. The simulation results indicate unequivocally that the changes of the water structure caused by the presence of ions in solution cannot be emulated as a pressure effect due to the local nature of such structure perturbation. (C) 2003 Elsevier B.V. All rights reserved.
C1 Oak Ridge Natl Lab, Div Chem Sci, Aqueous Chem & Geochem Grp, Oak Ridge, TN 37831 USA.
RP Chialvo, AA (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Aqueous Chem & Geochem Grp, Oak Ridge, TN 37831 USA.
EM 2ac@ornl.gov
OI Chialvo, Ariel/0000-0002-6091-4563
NR 35
TC 14
Z9 14
U1 0
U2 9
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-7322
J9 J MOL LIQ
JI J. Mol. Liq.
PD JUN 15
PY 2004
VL 112
IS 1-2
BP 99
EP 105
DI 10.1016/S0167-7322(03)00267-8
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 814VS
UT WOS:000221002800013
ER
PT J
AU Capote, G
Prioli, R
Jardim, PM
Zanatta, AR
Jacobsohn, LG
Freire, FL
AF Capote, G
Prioli, R
Jardim, PM
Zanatta, AR
Jacobsohn, LG
Freire, FL
TI Amorphous hydrogenated carbon films deposited by PECVD: influence of the
substrate temperature on film growth and microstructure
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Article; Proceedings Paper
CT 20th International Conference on Amorphous and Microcrystalline
Semiconductors
CY AUG 25-29, 2003
CL Campos do Jordao, BRAZIL
ID CHEMICAL-VAPOR-DEPOSITION; MECHANICAL-PROPERTIES; THIN-FILMS; PLASMA;
AR; DECOMPOSITION
AB Amorphous hydrogenated carbon films (a-C:H) were deposited by rf-PECVD using 13 Pa methane (98%)-argon (2%) mixture or pure methane as precursor atmospheres. Samples were deposited at 250, 300 and 420 K. The self-bias voltage (V-b) ranged from -50 to -500 V. The deposition rates are temperature dependent in agreement with the adsorbed layer model and the films deposited at low-temperature substrate have a polymeric character, revealed by the high hydrogen content, low-density and internal stress. AFM results show that both the substrate temperature and the argon ion assistance bombardment have the same effect on the surface roughness, i.e., they increase the surface mobility of the adsorbed species, resulting in films with lower surface roughness. Raman results revealed an increase of the sp(2) domains upon increase of self-bias voltage that is more important for films deposited at high-temperature. Independent on the substrate temperature, internal stress and hardness results present a maximum at around V-b = -160 V for films deposited in Ar-CH4 atmospheres, while it appears at higher V-b for films deposited from pure methane atmosphere. These results confirm the importance of the ion bombardment during film growth on the mechanical properties of the films. (C) 2004 Elsevier B.V. All rights reserved.
C1 Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22452970 Rio De Janeiro, Brazil.
Pontificia Univ Catolica Rio de Janeiro, Dept Ciencia Mat & Met, BR-22453900 Rio De Janeiro, Brazil.
Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560250 Sao Carlos, SP, Brazil.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Freire, FL (reprint author), Pontificia Univ Catolica Rio de Janeiro, Dept Fis, Rua Marques Sao Vicente,225 Gavea,Caixa Postal 38, BR-22452970 Rio De Janeiro, Brazil.
EM lazaro@vdg.fis.puc-rio.br
RI Zanatta, Antonio/C-1878-2012; Sao Carlos Institute of Physics,
IFSC/USP/M-2664-2016;
OI Zanatta, Antonio/0000-0002-5217-7524; Jacobsohn,
Luiz/0000-0001-8991-3903
NR 15
TC 11
Z9 11
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3093
J9 J NON-CRYST SOLIDS
JI J. Non-Cryst. Solids
PD JUN 15
PY 2004
VL 338
BP 503
EP 508
DI 10.1016/j.jnoncrysol.2004.03.029
PG 6
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA 831TM
UT WOS:000222219000112
ER
PT J
AU Osiele, OM
Britton, DT
Harting, M
Sperr, P
Topic, M
Shaheen, SE
Branz, HM
AF Osiele, OM
Britton, DT
Harting, M
Sperr, P
Topic, M
Shaheen, SE
Branz, HM
TI Defect structural characterization of organic polymer layers
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Article; Proceedings Paper
CT 20th International Conference on Amorphous and Microcrystalline
Semiconductors
CY AUG 25-29, 2003
CL Campos do Jordao, BRAZIL
AB In this paper, we study the effect of blending the conducting polymers, P3HT with the fullerene complex PCBM on its structural and defect characteristics. The films were deposited on glass substrates by spin casting, and were characterized with positron annihilation, microscopy and other techniques with regard to thickness, and structural homogeneity. The unblended polymers have positron annihilation characteristics similar to most non-polar polymers, exhibiting a relatively broad electron momentum distribution, a long-lived ( > 1 ns) positron state corresponding to the formation of orthopositronium, and strong-localization of the positron. Blending with PCBM causes the sample electron momentum distribution to narrow, and results in a single state with a lifetime of around 370 ps in both polymer mixtures. We postulate that this state corresponds to annihilation with low-momentum electrons in the fullerene cage. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ Cape Town, Dept Phys, ZA-7701 Rondebosch, South Africa.
Univ Bundeswehr Mnchen, Inst Nukl Festkorperphys, D-85577 Neubiberg, Germany.
Natl Ctr Photovolta, Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Univ Cape Town, Dept Phys, ZA-7701 Rondebosch, South Africa.
EM osiele@science.uct.ac.za
RI Shaheen, Sean/M-7893-2013
NR 14
TC 4
Z9 4
U1 1
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3093
EI 1873-4812
J9 J NON-CRYST SOLIDS
JI J. Non-Cryst. Solids
PD JUN 15
PY 2004
VL 338
BP 612
EP 616
DI 10.1016/j.jnoncrysol.2004.03.053
PG 5
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA 831TM
UT WOS:000222219000137
ER
PT J
AU Hossenlopp, J
Jiang, LH
Cernosek, R
Josse, F
AF Hossenlopp, J
Jiang, LH
Cernosek, R
Josse, F
TI Characterization of epoxy resin (SU-8) film using thickness-shear mode
(TSM) resonator under various conditions
SO JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
LA English
DT Article
DE viscoelastic properties; shear modulus; sensors; photoresists
ID QUARTZ-CRYSTAL MICROBALANCE; MECHANICAL-PROPERTIES; THIN-FILMS; LIQUIDS;
POLYMERS
AB Characterization of an epoxy resin film, commonly known as SU-8, is presented using thickness shear mode (TSM) quartz resonator. The impedance-admittance characteristics of the equivalent circuit models of the unperturbed and coated resonators are analyzed to extract the storage modulus and loss modulus (G' and G"). Those parameters are needed to establish SU-8 film as an effective wave-guiding layer in the implementation of guided shear-horizontal surface acoustic wave (SH-SAW) sensor platforms. Both cured and uncured polymer films are studied at the fundamental and third harmonic frequencies of the TSM resonators. The storage modulus (G') and loss modulus (G") of the SU-8 film approach constant values of 1.66 X 10(10) dyne/cm(2) and 6.0 X 10(8) dyne/cm(2), respectively, for relatively thicker films (>20 mum) at a relatively low frequency of 9 MHz. The most accurate values for the extracted shear moduli G (G = G' + jG") are obtained at high thickness where the viscoelastic contribution to the TSM response is substantial. The effect of temperature on the storage and loss moduli is determined for the range of -75 to 40 degreesC. It is found that the polymer approaches a totally glassy state below -60 degreesC. Exposure to water appears to follow Fickian diffusion behavior at short times and this exposure also results in changes to both G' and G". However, stability is rapidly reached with exposure to water, indicating relatively lower water absorption, consistent with the extracted diffusion coefficient. (C) 2004 Wiley Periodicals, Inc.
C1 Marquette Univ, Microsensor Res Lab, Milwaukee, WI 53201 USA.
Marquette Univ, Dept Chem, Milwaukee, WI 53201 USA.
Sandia Natl Labs, MicroAnalyt Syst Dept, Albuquerque, NM 87185 USA.
Marquette Univ, Dept Elect & Comp Engn, Milwaukee, WI 53201 USA.
RP Josse, F (reprint author), Marquette Univ, Microsensor Res Lab, POB 1881, Milwaukee, WI 53201 USA.
EM Fabien.Josse@mu.edu
NR 22
TC 31
Z9 31
U1 0
U2 13
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0887-6266
J9 J POLYM SCI POL PHYS
JI J. Polym. Sci. Pt. B-Polym. Phys.
PD JUN 15
PY 2004
VL 42
IS 12
BP 2373
EP 2384
DI 10.1002/polb.20111
PG 12
WC Polymer Science
SC Polymer Science
GA 825PG
UT WOS:000221769800019
ER
PT J
AU Rowe, CA
Thurber, CH
White, RA
AF Rowe, CA
Thurber, CH
White, RA
TI Dome growth behavior at Soufriere Hills Volcano, Montserrat, revealed by
relocation of volcanic event swarms, 1995-1996
SO JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
LA English
DT Article
DE microseismicity; cross-correlation; relocations; cluster analysis; dome
extrusion; Soufriere Hills; earthquake families
ID LOCAL EARTHQUAKE TOMOGRAPHY; REDOUBT-VOLCANO; HAYWARD FAULT; REAL-TIME;
JULY 1995; ERUPTION; CALIFORNIA; ALASKA; MAGNITUDE; EVOLUTION
AB We have relocated a subset of events from the digital waveform catalogue of similar to 17,000 volcanic microearthquakes recorded between July 1995 and February 1996 at Soufriere Hills Volcano (SHV), Montserrat, using a cross-correlation-based phase repicking technique with a joint location method. Hypocenters were estimated for 3914 earthquakes having five or more corrected P-wave picks. The seismic source region collapsed to a volume of similar to 1 km(3) from an initial similar to 100 km(3). Relocated events represent 36 swarms, each containing nearly identical waveforms, having source dimensions of 10 to 100 m in diameter and spatial separations on the order of 500 m or less. Each swarm occurred over a span of several hours to a few days.
Triggered data appear to miss between 65% and 98% of the events that occur within these swarms, based on review of helicorder records. Visual estimates of summit dome growth show a rough correspondence between episodes of intense swarming and increases in extruded magma, although dome observations are too sparse to make a direct comparison for this time period. The limited depth range over which dome-growth-related events occur is consistent with a dynamic model of cyclic plug extrusion behavior in the shallow conduit, governed by magma supply rate, overpressure buildup and physical properties of the magma and conduit geometry. Seismic sources may occur in locally overpressured regions that result from microlite formation in a zone of rapid decompression; we propose that this zone exists in the vicinity of a detachment plane associated with the cyclic plug extrusion. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ Wisconsin, Dept Geol & Geophys, Madison, WI 53706 USA.
US Geol Survey, Menlo Pk, CA 94025 USA.
RP Rowe, CA (reprint author), Los Alamos Natl Lab, EES-11,MS D-048, Los Alamos, NM 87545 USA.
EM char@lanl.gov
NR 51
TC 73
Z9 73
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0377-0273
J9 J VOLCANOL GEOTH RES
JI J. Volcanol. Geotherm. Res.
PD JUN 15
PY 2004
VL 134
IS 3
BP 199
EP 221
DI 10.1016/j.jvolgeores.2004.01.008
PG 23
WC Geosciences, Multidisciplinary
SC Geology
GA 824GE
UT WOS:000221673500004
ER
PT J
AU Burton, H
AF Burton, H
TI Imitation of life: How biology is inspiring computing.
SO LIBRARY JOURNAL
LA English
DT Book Review
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU BOWKER MAGAZINE GROUP CAHNERS MAGAZINE DIVISION
PI NEW YORK
PA 249 W 17TH ST, NEW YORK, NY 10011 USA
SN 0363-0277
J9 LIBR J
JI Libr. J.
PD JUN 15
PY 2004
VL 129
IS 11
BP 89
EP 89
PG 1
WC Information Science & Library Science
SC Information Science & Library Science
GA 835YH
UT WOS:000222521000196
ER
PT J
AU Tsige, M
Grest, GS
AF Tsige, M
Grest, GS
TI Molecular dynamics study of the evaporation process in polymer films
SO MACROMOLECULES
LA English
DT Article
ID SOLVENT EVAPORATION; SURFACE-TENSION; SIMULATION; INSTABILITIES;
DIFFUSION
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Tsige, M (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM mtsige@sandia.gov; gsgrest@sandia.gov
NR 19
TC 34
Z9 34
U1 2
U2 16
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD JUN 15
PY 2004
VL 37
IS 12
BP 4333
EP 4335
DI 10.1021/ma049509v
PG 3
WC Polymer Science
SC Polymer Science
GA 828SZ
UT WOS:000221994700001
ER
PT J
AU Jang, SY
Sotzing, GA
Marquez, M
AF Jang, SY
Sotzing, GA
Marquez, M
TI Poly(thiophene)s prepared via electrochemical solid-state oxidative
cross-linking. A comparative study
SO MACROMOLECULES
LA English
DT Article
ID STABLE CONDUCTING POLYMERS; CONJUGATED POLYMERS;
POLY(3-ALKYLTHIOPHENES); POLYTHIOPHENES; DEVICES;
POLY(3-METHYLTHIOPHENE); POLYMERIZATION; TERTHIOPHENES; DERIVATIVES;
ELECTRODES
AB A comparative study of solid-state oxidative cross-linking (SOC) of polynorbornylenes containing thiophene (N1T), bithiophene (N2T), and terthiophene pendants (N3T) probing polymerization ability, kinetics, and the electrochemical and optical properties of the resulting conductive polythiophene interpenetrating networks (IPN)s is reported. Generally, conductive IPNs prepared from these systems were found to exhibit the capability to shuttle ions with predominant anion transport during the doping/dedoping process and were found to have doping levels ranging from 17 to 36%. N2T was found to produce conductive IPNs via SOC with a lower energy pi to pi* transition compared to those prepared from N3T.
C1 Univ Connecticut, Inst Sci Mat, Dept Chem, Storrs, CT 06269 USA.
Univ Connecticut, Inst Sci Mat, Polymer Program, Storrs, CT 06269 USA.
Kraft Foods R&D, Nanotechnol Lab, Glenview, IL 60025 USA.
Los Alamos Natl Lab, Chem Sci & Technol Div, Los Alamos, NM 87545 USA.
RP Sotzing, GA (reprint author), Univ Connecticut, Inst Sci Mat, Dept Chem, 97 N Eagleville Rd, Storrs, CT 06269 USA.
EM Sotzing@mail.ims.uconn.edu
NR 36
TC 35
Z9 35
U1 0
U2 4
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD JUN 15
PY 2004
VL 37
IS 12
BP 4351
EP 4359
DI 10.1021/ma049404s
PG 9
WC Polymer Science
SC Polymer Science
GA 828SZ
UT WOS:000221994700005
ER
PT J
AU Alam, TM
AF Alam, TM
TI Solid-state C-13 magic angle spinning NMR spectroscopy characterization
of particle size structural variations in synthetic nanodiamonds
SO MATERIALS CHEMISTRY AND PHYSICS
LA English
DT Article
DE NMR; diamond; nanodiamond; C-13 MAS NMR
ID LATTICE-RELAXATION; DIAMOND POLYTYPES; CARBON; DEFECTS
AB Solid-state C-13 magic angle spinning (MAS) NMR spectroscopy has been used to quantify the different carbon species observed in synthetically produced nanodiamonds. Two different diamond-like carbon species were observed using C-13 MAS NMR, which have been attributed to a highly ordered crystalline diamond phase and a disordered crystalline diamond phase. The relative ratio of these different diamond phases was found to vary with the particle size of the nanodiamond materials. (C) 2004 Elsevier B.V. All rights reserved.
C1 Sandia Natl Labs, Dept Organ Mat, Albuquerque, NM 87185 USA.
RP Alam, TM (reprint author), Sandia Natl Labs, Dept Organ Mat, POB 5800, Albuquerque, NM 87185 USA.
EM tmalam@sandia.gov
NR 18
TC 26
Z9 26
U1 2
U2 9
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0254-0584
J9 MATER CHEM PHYS
JI Mater. Chem. Phys.
PD JUN 15
PY 2004
VL 85
IS 2-3
BP 310
EP 315
DI 10.1016/j.matchemphys.2004.01.029
PG 6
WC Materials Science, Multidisciplinary
SC Materials Science
GA 821DR
UT WOS:000221440700011
ER
PT J
AU Li, TZ
Grignon, F
Benson, DJ
Vecchio, KS
Olevsky, EA
Jiang, FC
Rohatgi, A
Schwarz, RB
Meyers, MA
AF Li, TZ
Grignon, F
Benson, DJ
Vecchio, KS
Olevsky, EA
Jiang, FC
Rohatgi, A
Schwarz, RB
Meyers, MA
TI Modeling the elastic properties and damage evolution in Ti-Al3Ti
metal-intermetallic laminate (MIL) composites
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE laminate composites; mechanical performance; damage evolution; FEM
modeling
ID SURFACE COMPRESSION; FRACTURE-TOUGHNESS; STRESSES; BEHAVIOR; CERAMICS
AB The mechanical performance of Ti-Al3Ti metal-intermetallic laminate (MIL) composites synthesized by a reactive foil sintering technique was evaluated. The elastic properties and anisotropy of the laminates were calculated and successfully compared with resonant ultrasonic spectroscopy (RUS) measurements. The effect of internal stresses due to differences in the thermal expansion coefficient on fracture toughness was analyzed. The principal mechanisms of damage initiation and accumulation were identified experimentally. The compressive strength was modeled by FEM using the Johnson-Holmquist constitutive equation. The computed results were successfully compared with experiments. (C) 2003 Elsevier B.V. All rights reserved.
C1 Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093 USA.
San Diego State Univ, Dept Mech Engn, San Diego, CA 92182 USA.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093 USA.
EM mameyers@mae.ucsd.edu
RI Vecchio, Kenneth/F-6300-2011; Meyers, Marc/A-2970-2016
OI Vecchio, Kenneth/0000-0003-0217-6803; Meyers, Marc/0000-0003-1698-5396
NR 33
TC 33
Z9 42
U1 0
U2 11
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
EI 1873-4936
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD JUN 15
PY 2004
VL 374
IS 1-2
BP 10
EP 26
DI 10.1016/j.msea.2003.09.074
PG 17
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 852EQ
UT WOS:000223738400002
ER
PT J
AU Lee, DB
Santella, ML
AF Lee, DB
Santella, ML
TI High temperature oxidation of Ni3Al alloy containing Cr, Zr, Mo, and B
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE nickel alummides based on Ni3Al; oxidation
ID NICKEL ALUMINIDES; BEHAVIOR; CHROMIUM; ZIRCONIUM; ADDITIONS
AB The oxidation behavior of a 74.028 Ni-16.004 Al-7.844 Cr-1.263 Zr-0.836 Mo-0.025 B at.% alloy, known as IC221M, has been studied at 900, 1000 and 1100degreesC in air. Isothermal and cyclic weight gain measurements indicated that protective scales formed on the alloy at 900 and 1000degreesC. At 1100degreesC, massive scale spallation after 220 h of exposure was observed for cyclic oxidation conditions. The oxide scales consisted mainly of an outer NiO oxide layer, and inner, mixed oxides of alpha-Al2O3, NiAl2O4, and (monoclinic, tetragonal)-ZrO2. Some alumina and zirconia existed as internal oxide stringers. The oxide grains were frequently incorporated with dissolved, foreign cations such as Cr or Ni to a certain extent. (C) 2004 Elsevier B.V. All rights reserved.
C1 Sungkyunkwan Univ, Ctr Adv Plasma Surface Technol, Suwon 440746, South Korea.
Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA.
RP Lee, DB (reprint author), Sungkyunkwan Univ, Ctr Adv Plasma Surface Technol, Suwon 440746, South Korea.
EM dlee@yurim.skku.ac.kr
NR 20
TC 24
Z9 29
U1 0
U2 7
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD JUN 15
PY 2004
VL 374
IS 1-2
BP 217
EP 223
DI 10.1016/j.msea.2004.02.012
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 852EQ
UT WOS:000223738400028
ER
PT J
AU Palmer, TA
Elmer, JW
Babu, SS
AF Palmer, TA
Elmer, JW
Babu, SS
TI Observations of ferrite/austenite transformations in the heat affected
zone of 2205 duplex stainless steel spot welds using time resolved X-ray
diffraction
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE time resolved X-ray diffraction; duplex stainless steels; phase
transformations; ferrite; austenite; nitrogen
ID IN-SITU OBSERVATIONS; PHASE-TRANSFORMATIONS; MICROSTRUCTURE EVOLUTION;
ARC WELDS; SYNCHROTRON-RADIATION; AUSTENITE FORMATION; PITTING
CORROSION; PROCESS MODEL; FUSION WELDS; SOLIDIFICATION
AB Time resolved X-ray diffraction (TRXRD) measurements are made in the heat affected zone (HAZ) of 2205 duplex stainless steel (DSS) spot welds. Both the gamma --> delta and delta --> gamma transformations are monitored as a function of time during the rapid spot weld heating and cooling cycles. These observations are then correlated with calculated thermal cycles. Where the peak temperatures are highest (similar to1342degreesC) the gamma --> delta transformation proceeds to completion, leaving a ferritic microstructure at the end of heating. With lower peak temperatures, the gamma --> delta transformation proceeds to only partial completion, resulting in a microstructure containing both transformed and untransformed austenite. Further analyses of the individual diffraction patterns show shifts in the peak positions and peak widths as a function of both time and temperature. In addition, these changes in the peak characteristics are correlated with measured changes in the ferrite volume fraction. Such changes in the peak positions and widths during the gamma --> delta transformation provide an indication of changes occurring in each phase. These changes in peak properties can be correlated with the diffusion of nitrogen and other substitutional alloying elements, which are recognized as the primary mechanisms for this transformation. Upon cooling, the delta --> gamma transformation is observed to proceed from both the completely and partially transformed microstructural regions in the TRXRD data. An examination of the resulting microstructures confirms the TRXRD observation as the evidence shows that austenite both nucleates and grows from the ferritic microstructure at locations closest to the fusion zone boundary and grows from untransformed austenite grains at locations further from this boundary. (C) 2004 Elsevier B.V. All rights reserved.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Palmer, TA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM palmer18@llnl.gov
RI Babu, Sudarsanam/D-1694-2010
OI Babu, Sudarsanam/0000-0002-3531-2579
NR 39
TC 42
Z9 42
U1 2
U2 18
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD JUN 15
PY 2004
VL 374
IS 1-2
BP 307
EP 321
DI 10.1016/j.msea.2004.03.037
PG 15
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 852EQ
UT WOS:000223738400040
ER
PT J
AU Zhang, X
Libertun, AR
Paul, A
Gagnon, E
Backus, S
Christov, IP
Murnane, MM
Kapteyn, HC
Bartels, RA
Liu, Y
Attwood, DT
AF Zhang, X
Libertun, AR
Paul, A
Gagnon, E
Backus, S
Christov, IP
Murnane, MM
Kapteyn, HC
Bartels, RA
Liu, Y
Attwood, DT
TI Highly coherent light at 13 nm generated by use of quasi-phase-matched
high-harmonic generation
SO OPTICS LETTERS
LA English
DT Article
AB By measuring the fringe visibility in a Young's double pinhole experiment, we demonstrate that quasi-phase-matched high-harmonic generation produces beams with very high spatial coherence at wavelengths around 13 nm. To our knowledge these are the highest spatial coherence values ever measured at such short wavelengths from any source without spatial filtering. This results in a practical, small-scale, coherent, extreme-ultraviolet source that is useful for applications in metrology, imaging, and microscopy. (C) 2004 Optical Society of America.
C1 Univ Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309 USA.
Colorado State Univ, Dept Elect & Comp Engn, Ft Collins, CO 80523 USA.
Univ Calif Berkeley, Appl Sci & Technol Grad Grp, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Xray Opt, Berkeley, CA 94720 USA.
RP Libertun, AR (reprint author), Univ Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309 USA.
EM arl@colorado.edu
RI Backus, Sterling/C-2506-2008; Kapteyn, Henry/H-6559-2011; Christov,
Ivan/D-4446-2014
OI Kapteyn, Henry/0000-0001-8386-6317; Christov, Ivan/0000-0002-9146-6708
NR 12
TC 31
Z9 31
U1 0
U2 2
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD JUN 15
PY 2004
VL 29
IS 12
BP 1357
EP 1359
DI 10.1364/OL.29.001357
PG 3
WC Optics
SC Optics
GA 825KN
UT WOS:000221756000017
PM 15233434
ER
PT J
AU Tseng, SH
Greene, JH
Taflove, A
Maitland, D
Backman, V
Walsh, J
AF Tseng, SH
Greene, JH
Taflove, A
Maitland, D
Backman, V
Walsh, J
TI Exact solution of Maxwell's equations for optical interactions with a
macroscopic random medium
SO OPTICS LETTERS
LA English
DT Article
ID PSTD ALGORITHM; WAVELENGTH; CELLS
AB We report what we believe to be the first rigorous numerical solution of the two-dimensional Maxwell equations for optical propagation within, and scattering by, a random medium of macroscopic dimensions. Our solution is based on the pseudospectral time-domain technique, which provides essentially exact results for electromagnetic field spatial modes sampled at the Nyquist rate or better. The results point toward the emerging feasibility of direct, exact Maxwell equations modeling of light propagation through many millimeters of biological tissues. More generally, our results have a wider implication: Namely, the study of electromagnetic wave propagation within random media is moving toward exact rather than approximate solutions of Maxwell's equations. (C) 2004 Optical Society of America.
C1 Northwestern Univ, Dept Elect & Comp Engn, Evanston, IL 60208 USA.
Lawrence Livermore Natl Lab, Med Phys & Biophys Div, Livermore, CA 94550 USA.
Northwestern Univ, Dept Biomed Engn, Evanston, IL 60208 USA.
RP Tseng, SH (reprint author), Northwestern Univ, Dept Elect & Comp Engn, Evanston, IL 60208 USA.
EM snow@ece.northwestern.edu
RI Backman, Vadim/B-6689-2009; Taflove, Allen/B-7275-2009;
OI TSENG, SNOW-HONG/0000-0003-1743-801X
FU NCI NIH HHS [5R01CA085991-03]
NR 8
TC 19
Z9 19
U1 1
U2 5
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD JUN 15
PY 2004
VL 29
IS 12
BP 1393
EP 1395
DI 10.1364/OL.29.001393
PG 3
WC Optics
SC Optics
GA 825KN
UT WOS:000221756000029
PM 15233446
ER
PT J
AU Reichhardt, CJO
Reichhardt, C
Martin, I
Bishop, AR
AF Reichhardt, CJO
Reichhardt, C
Martin, I
Bishop, AR
TI Dynamics and melting of stripes, crystals, and bubbles with quenched
disorder
SO PHYSICA D-NONLINEAR PHENOMENA
LA English
DT Article; Proceedings Paper
CT International Workshop on Anomalous Distributions, Nonlinear Dynamics
and Nonextensivity
CY NOV 06-09, 2002
CL Santa Fe, NM
SP Los Alamos Natl Lab
DE two-dimensional systems; quenched disorder; short and long-range
interactions
ID VORTEX LATTICES; PHASES; SYSTEMS; LIQUID; TRANSITION; PATTERNS; NOISE;
FILM
AB Two-dimensional systems in which there is a competition between long-range repulsion and short-range attraction exhibit a remarkable variety of patterns such as stripes, bubbles, and labyrinths. Such systems include magnetic films, Langmuir monolayers, polymers, gets, water-oil mixtures, and two-dimensional electron systems. In many of these systems quenched disorder from the underlying substrate may be present. We examine the dynamics and stripe formation in the presence of both an applied dc drive and quenched disorder. When the disorder strength exceeds a critical value, an applied dc drive can induce a dynamical stripe ordering transition to a state that is more ordered than the originating undriven, unpinned pattern. We also consider the melting transition of the different patterns. (C) 2004 Published by Elsevier B.V.
C1 Los Alamos Natl Lab, Div Theoret, Ctr Nonlinear Sci, Los Alamos, NM 87545 USA.
RP Los Alamos Natl Lab, Div Theoret, Ctr Nonlinear Sci, T-12,MS B268, Los Alamos, NM 87545 USA.
EM cjrx@lan1.gov
NR 31
TC 14
Z9 14
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-2789
EI 1872-8022
J9 PHYSICA D
JI Physica D
PD JUN 15
PY 2004
VL 193
IS 1-4
BP 303
EP 309
DI 10.1016/j.physd.2004.01.027
PG 7
WC Mathematics, Applied; Physics, Multidisciplinary; Physics, Mathematical
SC Mathematics; Physics
GA 830WH
UT WOS:000222154400025
ER
PT J
AU Fiquet, G
Badro, J
Guyot, F
Bellin, C
Krisch, M
Antonangeli, D
Requardt, H
Mermet, A
Farber, D
Aracne-Ruddle, C
Zhang, J
AF Fiquet, G
Badro, J
Guyot, F
Bellin, C
Krisch, M
Antonangeli, D
Requardt, H
Mermet, A
Farber, D
Aracne-Ruddle, C
Zhang, J
TI Application of inelastic X-ray scattering to the measurements of
acoustic wave velocities in geophysical materials at very high pressure
SO PHYSICS OF THE EARTH AND PLANETARY INTERIORS
LA English
DT Article; Proceedings Paper
CT High Pressure Mineral Physics Seminars
CY AUG 26-31, 2002
CL Verbania, ITALY
DE earth's interior; mineral physics; high pressure; physical properties;
elasticity; techniques
ID EARTHS INNER-CORE; IMPULSIVE STIMULATED SCATTERING; ELASTIC-CONSTANTS;
PHONON-DISPERSION; MGSIO3 PEROVSKITE; SOUND VELOCITIES;
BRILLOUIN-SCATTERING; ENERGY RESOLUTION; LATTICE-DYNAMICS; AB-INITIO
AB Reference Earth global models used by geophysicists are mostly constrained by analysing seismic waves that travel in the Earth. The interpretation of these seismological models in terms of chemical composition and temperature thus relies on the knowledge of the chemical composition, structure and elastic properties of some candidate materials relevant to geophysics. We will describe some recent advances in experimental mineral physics which yield essential information on the elastic properties of pertinent materials of Earth's mantle and core. In particular, we show that inelastic X-ray scattering (IXS) proves to be a well suited spectroscopic technique for the study of phonon dispersion in materials under high pressure. Inelastic scattering experiments carried out on polycrystalline samples provide measurements of orientationally averaged longitudinal acoustic velocities whereas investigations on single crystals yield elastic moduli. Such a technique is thus highly interesting for mineral physicists and offers a great potential in providing essential elastic data and their pressure and/or temperature dependence on most compounds of geophysical interest. (C) 2004 Published by Elsevier B.V.
C1 Univ Paris 06, Lab Mineral Cristallog, UMR 7590, CNRS,Inst Phys Globe Paris, F-75252 Paris 05, France.
Univ Paris 07, Lab Mineral Cristallog, UMR 7590, CNRS,Inst Phys Globe Paris, F-75252 Paris, France.
European Synchrotron Radiat Facil, F-38043 Grenoble, France.
Lawrence Livermore Natl Lab, Energy & Environm Directorate, Livermore, CA 94550 USA.
SUNY Stony Brook, CHiPR, Stony Brook, NY 11794 USA.
SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA.
RP Fiquet, G (reprint author), Univ Paris 06, Lab Mineral Cristallog, UMR 7590, CNRS,Inst Phys Globe Paris, 4 Pl Jussieu, F-75252 Paris 05, France.
EM fiquet@lmcp.jussieu.fr
RI Farber, Daniel/F-9237-2011; Fiquet, Guillaume/H-1219-2011; Fiquet,
Guillaume/M-6934-2014; GUYOT, Francois/C-3824-2016; IMPMC,
Geobio/F-8819-2016; Badro, James/A-6003-2011
OI GUYOT, Francois/0000-0003-4622-2218;
NR 69
TC 27
Z9 28
U1 0
U2 14
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0031-9201
J9 PHYS EARTH PLANET IN
JI Phys. Earth Planet. Inter.
PD JUN 15
PY 2004
VL 143
BP 5
EP 18
DI 10.1016/j.pepi.2003.10.005
PG 14
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 831AL
UT WOS:000222165200002
ER
PT J
AU Nishiyama, N
Irifune, T
Inoue, T
Ando, J
Funakoshi, K
AF Nishiyama, N
Irifune, T
Inoue, T
Ando, J
Funakoshi, K
TI Precise determination of phase relations in pyrolite across the 660 km
seismic discontinuity by in situ X-ray diffraction and quench
experiments
SO PHYSICS OF THE EARTH AND PLANETARY INTERIORS
LA English
DT Article; Proceedings Paper
CT High Pressure Mineral Physics Seminars
CY AUG 26-31, 2002
CL Verbania, ITALY
DE pyrolite; 660 km seismic discontinuity; ringwoodite; majorite garnet; in
situ X-ray diffraction experiments; Fe-Mg partitioning
ID EQUATION-OF-STATE; LOWER MANTLE; HIGH-PRESSURE; GEOPHYSICAL
IMPLICATIONS; CALIBRATION STANDARD; CASIO3 PEROVSKITE; MGSIO3
PEROVSKITE; THERMAL EQUATION; EARTHS MANTLE; SYSTEM
AB Mineral assemblage changes in a pyrolite composition with increasing pressure were observed by in situ X-ray diffraction and quench experiments at pressures near that of the 660 km seismic discontinuity and at a fixed temperature of 1600 degreesC. According to results obtained by in situ X-ray diffraction experiments, ringwoodite (Rw) was observed with majorite garnet and CaSiO3-rich perovskite at pressures of about 20-22GPa. Dissociation of ringwoodite to MgSiO3-rich perovskite and magnesiowustite (Mw) was completed at 22.0 +/- 0.2 GPa according to Matsui et al.'s periclase pressure scale, and at 21.7 +/- 0.1 GPa according to Shim et al.'s old pressure scale. Majorite garnet persisted to about 24 GPa where pyrolite transformed to a lower mantle mineral assemblage, i.e. MgSiO3-perovskite, CaSiO3-rich perovskite, and magnesiowustite. Thus, majorite garnet coexists with the lower mantle assemblage at pressures of about 22-24 GPa. In the quench experiments, an assemblage of Mg2SiO3-perovskite, niagnesiowustite, CaSiO3-rich perovskite, and majorite garnet was synthesized at 22.5 GPa and 1600degreesC, in which Mg-perovskite contained 2.8 wt.% Al2O3, and was significantly poorer in Fe than coexisting magnesiowustite. The Fe-Mg partition coefficient between Mg-perovskite and magnesiowustite including ferric iron (K-app = 0.27 +/- 0.06) is very close to that in the Al-free system, which suggests that these P-T conditions are in the vicinity of those of ringwoodite decomposition. Both the results of in situ X-ray diffraction and quench experiments in the present study yield a convergent result that ringwoodite decomposes into Mg-perovskite and magnesiowustite before the gamet-to-perovskite transition at 4600 degreesC in pyrolite. The relation between the Al content in Mg-perovskite and K-app in pyrolite is non-linear, which is consistent with the Fe-Mg partitioning between Mg-perovskite and magnesiowustite previously reported for a simpler MgO-FeO-Al2O3-SiO2 system. (C) 2004 Published by Elsevier B.V.
C1 Ehime Univ, Geodynam Res Ctr, Matsuyama, Ehime 7908577, Japan.
Hiroshima Univ, Dept Earth & Planetary Syst Scci, Higashihiroshima 7398526, Japan.
Japan Synchrotron Radiat Res Inst, Mikazuki, Hyogo 6795198, Japan.
RP Nishiyama, N (reprint author), Argonne Natl Lab, 9700 S Cass Ave,Bldg 434 A, Argonne, IL 60439 USA.
EM nishiyama@cars.uchicago.edu
RI Nishiyama, Norimasa/A-7627-2016
NR 49
TC 22
Z9 23
U1 1
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0031-9201
J9 PHYS EARTH PLANET IN
JI Phys. Earth Planet. Inter.
PD JUN 15
PY 2004
VL 143
BP 185
EP 199
DI 10.1016/j.pepi.2003.08.010
PG 15
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 831AL
UT WOS:000222165200014
ER
PT J
AU Xu, YS
Shankland, TJ
Linhardt, S
Rubie, DC
Langenhorst, F
Klasinski, K
AF Xu, YS
Shankland, TJ
Linhardt, S
Rubie, DC
Langenhorst, F
Klasinski, K
TI Thermal diffusivity and conductivity of olivine, wadsleyite and
ringwoodite to 20 GPa and 1373 K
SO PHYSICS OF THE EARTH AND PLANETARY INTERIORS
LA English
DT Article; Proceedings Paper
CT High Pressure Mineral Physics Seminars
CY AUG 26-31, 2002
CL Verbania, ITALY
DE heat transport; high pressure; earth's mantle; subducting lithosphere;
multianvil apparatus
ID ROCK-FORMING MINERALS; HIGH-TEMPERATURES; LIGHT-SCATTERING;
PHASE-TRANSFORMATIONS; DEEP EARTHQUAKES; UPPER-MANTLE; PRESSURE; MODEL;
COMPUTATION; DIFFRACTION
AB We present results of lattice thermal diffusivity measurements oil (Mg0.9Fe0.1)(2)SiO4 olivine and its high-pressure polymorphs wadsleyite and ringwoodite under mantle conditions. We used the Angstrom method on cylindrical samples in multianvil apparatus at pressures up to 20 GPa and temperatures up to 1373 K. Because of the fine polycrystallinity of the specimens (similar to30-40 mum or less), there is strong scattering/absorption of light and suppression of radiative transport so that the lattice vibrational component is the dominant heat transfer mode. Lattice thermal conductivities were calculated from the thermal diffusivity results using heat capacity and equation of state data. Olivine thermal conductivities are consistent with previous results obtained at 1 atm [e.g. J. Am. Ceramic Soc. 38 (1954) 107; J. Geophys. Res. 77 (1972) 6966; Science 283 (1999) 1699]. Thermal conductivity increases by approximately 30% at the transition from olivine to wadsleyite (corresponding to the 410 km discontinuity) and a further, but smaller, increase may occur at the transition from wadsleyite to ringwoodite. For each of these phases, lattice conductivity closely follows a T-1/2 dependence on temperature T [Phys. Rev. 119 (1960) 507; J. Geophys. Res. 79 (1974) 703; Brown, 2002]. If such a dependence applies to other silicates and complex crystals, there should be a useful way to estimate conductivities at high temperatures from room temperature measurements. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ Bayreuth, Bayer Geoinst, D-95440 Bayreuth, Germany.
Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
RP Xu, YS (reprint author), Yale Univ, Dept Geol & Geophys, POB 208109, New Haven, CT 06520 USA.
EM yousheng.xu@yale.edu
NR 59
TC 75
Z9 80
U1 3
U2 20
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0031-9201
J9 PHYS EARTH PLANET IN
JI Phys. Earth Planet. Inter.
PD JUN 15
PY 2004
VL 143
BP 321
EP 336
DI 10.1016/j.pepi.2004.03.005
PG 16
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 831AL
UT WOS:000222165200026
ER
PT J
AU Luo, SN
Ahrens, TJ
AF Luo, SN
Ahrens, TJ
TI Shock-induced superheating and melting curves of geophysically important
minerals
SO PHYSICS OF THE EARTH AND PLANETARY INTERIORS
LA English
DT Article; Proceedings Paper
CT High Pressure Mineral Physics Seminars
CY AUG 26-31, 2002
CL Verbania, ITALY
DE superheating; melting curve; shock waves; sound-speed; molecular
dynamics
ID PHASE-TRANSITIONS; STABILITY LIMIT; IRON; TEMPERATURES; NUCLEATION;
COMPRESSION; SYSTEMATICS; PRESSURES; ENTROPY; CORE
AB Shock-state temperature and sound-speed measurements on crystalline materials, demonstrate superheating-melting behavior distinct from equilibrium melting. Shocked solid can be superheated to the maximum temperature, T(c'). At slightly higher pressure, P(c) shock melting occurs, and induces a lower shock temperature, T(c). The Hugoniot state, (P(c), T(c)), is inferred to fie along the equilibrium melting curve. The amount of superheating achieved on Hugoniot is, Theta(H)(+) = T(c')/T(c) - 1. Shock-induced H superheating for a number of silicates, alkali halides and metals agrees closely with the predictions of a systematic framework describing superheating at various heating rates [Appl. Phys. Lett. 82 (12) (2003) 1836]. High-pressure melting curves are constructed by integration from (P(c), T(c)) based on the Lindemann law. We calculate the volume and entropy changes upon melting at (P(c), T(c)) assuming the R In 2 rule (R is the gas constant) for the disordering entropy of melting [J. Chem. Phys. 19 (1951) 93; Sov. Phys. Usp. 117 (1975) 625; Poirier, J.P., 1991. Introduction to the Physics of the Earth's Interior. Cambridge University Press, Cambridge, 102 pp.].
(P(c), T(c)) and the Lindemann melting curves are in excellent accord with diamond-anvil cell (DAC) results for NaCl, KBr and stishovite. But significant discrepancies exist for transition metals. If we extrapolate the DAC melting data [Phys. Rev. B 63 (2001) 132104] for transition metals (Fe, V, Mo, W and Ta) to 200-400 GPa where shock melting occurs, shock temperature measurement and calculation would indicate Theta(H)(+) similar to 0.7-2.0. These large values of superheating are not consistent with the H superheating systematics. The discrepancies could be reconciled by possible solid-solid phase transitions at high pressures. In particular, this work suggests that Fe undergoes a possible solid-solid phase transition at similar to200 GPa and melts at similar to270 GPa upon shock wave loading, and the melting temperature is similar to6300 K at 330 GPa. (C) 2004 Elsevier B.V. All rights reserved.
C1 CALTECH, Seismol Lab, Lindhurst Lab Expt Geophys, Pasadena, CA 91125 USA.
RP Luo, SN (reprint author), Los Alamos Natl Lab, MS E526, Los Alamos, NM 87545 USA.
EM sluo@lan1.gov
RI Luo, Sheng-Nian /D-2257-2010
OI Luo, Sheng-Nian /0000-0002-7538-0541
NR 65
TC 55
Z9 57
U1 3
U2 23
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0031-9201
J9 PHYS EARTH PLANET IN
JI Phys. Earth Planet. Inter.
PD JUN 15
PY 2004
VL 143
BP 369
EP 386
DI 10.1016/j.pepi.2003.04.001
PG 18
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 831AL
UT WOS:000222165200030
ER
PT J
AU Fraser, HB
Hirsh, AE
Wall, DP
Eisen, MB
AF Fraser, HB
Hirsh, AE
Wall, DP
Eisen, MB
TI Coevolution of gene expression among interacting proteins
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
ID GENOME-WIDE ANALYSIS; SACCHAROMYCES-CEREVISIAE; YEAST; BIOGENESIS;
SELECTION; EVOLUTION; SEQUENCE; PATTERNS; NETWORKS; PROFILES
AB Physically interacting proteins or parts of proteins are expected to evolve in a coordinated manner that preserves proper interactions. Such coevolution at the amino acid-sequence level is well documented and has been used to predict interacting proteins, domains, and amino acids. Interacting proteins are also often precisely coexpressed with one another, presumably to maintain proper stoichiometry among interacting components. Here, we show that the expression levels of physically interacting proteins coevolve. We estimate average expression levels of genes from four closely related fungi of the genus Saccharomyces using the codon adaptation index and show that expression levels of interacting proteins exhibit coordinated changes in these different species. We find that this coevolution of expression is a more powerful predictor of physical interaction than is coevolution of amino acid sequence. These results demonstrate that gene expression levels can coevolve, adding another dimension to the study of the coevolution of interacting proteins and underscoring the importance of maintaining coexpression of interacting proteins over evolutionary time. Our results also suggest that expression coevolution can be used for computational prediction of protein-protein interactions.
C1 Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
Stanford Univ, Dept Biol Sci, Stanford, CA 94305 USA.
Harvard Univ, Sch Med, Comp Biol Initiat, Boston, MA 02115 USA.
Lawrence Berkeley Lab, Dept Genome Sci, Berkeley, CA 92720 USA.
Harvard Univ, Dept Syst Biol, Boston, MA 02115 USA.
RP Fraser, HB (reprint author), 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM hunter@ocf.berkeley.edu
OI Eisen, Michael/0000-0002-7528-738X
NR 35
TC 124
Z9 132
U1 0
U2 11
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 JUN 15
PY 2004
VL 101
IS 24
BP 9033
EP 9038
DI 10.1073/pnas.0402591101
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 830EQ
UT WOS:000222104900038
PM 15175431
ER
PT J
AU Ali, SM
Jennings, JM
Phinney, LM
AF Ali, SM
Jennings, JM
Phinney, LM
TI Temperature dependence for in-use stiction of polycrystalline silicon
MEMS cantilevers
SO SENSORS AND ACTUATORS A-PHYSICAL
LA English
DT Article
DE in-use stiction; MEMS reliability; surface adhesion; OTS; surface
micromachining
ID ADHESION; FORCES; FILMS
AB Adhesion during operation, referred to as in-use stiction, shortens the useful lifetimes and reliability of microelectromechanical systems (MEMS). In this paper, operational reliability tests were performed to investigate the effect of temperature on in-use stiction for surface-micromachined, polycrystalline silicon MEMS cantilevers subject to three release techniques: supercritical CO2 drying, laser irradiation repair, and an octadecyltrichlorosilane (OTS) deposition process. The cantilevers were heated from room temperature to 300degreesC and then returned to room temperature. The cantilevers were electrostatically actuated at specific temperatures between 22 and 300 C during the heating and cooling stages, and their sticking probabilities determined. The failure probability results exhibit a slight variation with temperature for microcantilevers released using the supercritical CO2 dry and laser irradiation repair. However, in-use stiction of microcantilevers coated with OTS is strongly dependent on temperature. The incidence of in-use stiction was highest during the heating stage, reduced during the cooling stage, and decreased further when the samples were reheated to 300 degreesC. The results indicate that thermal annealing of OTS coated structures in air decreases in-use stiction failures. Surface characterization of OTS coated samples was conducted using contact angle goniometry, atomic force microscopy, and X-ray photoelectron spectroscopy. (C) 2004 Published by Elsevier B.V.
C1 Univ Illinois, Dept Mech & Ind Engn, Urbana, IL 61801 USA.
RP Phinney, LM (reprint author), Sandia Natl Labs, POB 5800 MS 1310, Albuquerque, NM 87185 USA.
EM lmphinn@sandia.gov
NR 20
TC 6
Z9 6
U1 0
U2 2
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0924-4247
J9 SENSOR ACTUAT A-PHYS
JI Sens. Actuator A-Phys.
PD JUN 15
PY 2004
VL 113
IS 1
BP 60
EP 70
DI 10.1016/j.sna.2004.01.037
PG 11
WC Engineering, Electrical & Electronic; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 833ZH
UT WOS:000222379800007
ER
PT J
AU Lei, H
Pitt, WG
McGrath, LK
Ho, CK
AF Lei, H
Pitt, WG
McGrath, LK
Ho, CK
TI Resistivity measurements of carbon-polymer composites in chemical
sensors: impact of carbon concentration and geometry
SO SENSORS AND ACTUATORS B-CHEMICAL
LA English
DT Article
DE chemiresistor sensor; carbon-polymer composites; general effective media
equation; resistivity measurement
ID VOLATILE ORGANIC-COMPOUNDS; ELECTRICAL-CONDUCTIVITY; ARRAYS; BLACK;
PERCOLATION; TEMPERATURE; DEPENDENCE; MIXTURES; DESIGN
AB Chemiresistor sensors comprised of conductive polymer composites have shown great potential in identifying gaseous analytes. The performance of these sensors depends on a number of parameters, including the geometry and concentration of the conductive component dispersed in the polymer. In this study, 64 chemiresistors representing eight different carbon concentrations (8-60vol.% carbon) were constructed by depositing thin films of a carbon black-polyisobutylene composite onto concentric spiral platinum electrodes on a silicon chip. The impact of carbon concentration and geometry on the measured resistance and derived resistivity of the polymer composite was determined. The thickness and surface topography of each sensor was measured with a mechanical profilometer, and the resistance of each sensor was measured in dry air at room temperature. Finite element modeling was used to correlate the thickness and measured electrical resistance with the intrinsic resistivity of the polymer-carbon composite. The derived resistivity data fit the general effective media (GEM) model adequately, and the fitted parameters predicted values for percolation threshold and carbon resistivity that were consistent with published literature. Further finite element modeling showed that resistivity was a strong function of composite composition and thickness, but was relatively insensitive to the surface roughness of the composite on the sensor. The correlations developed herein can be used in reverse to calculate the thickness of the composite polymer film deposited on the solid substrate from a measurement of resistance in dry air. (C) 2004 Elsevier B.V. All rights reserved.
C1 Brigham Young Univ, Dept Chem Engn, Provo, UT 84602 USA.
Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Pitt, WG (reprint author), Brigham Young Univ, Dept Chem Engn, 350 Clyde Bldg, Provo, UT 84602 USA.
EM pitt@byu.edu
RI Pitt, William/M-6647-2014
NR 35
TC 32
Z9 33
U1 0
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 JUN 15
PY 2004
VL 101
IS 1-2
BP 122
EP 132
DI 10.1016/j.sub.2004.02.042
PG 11
WC Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation
SC Chemistry; Electrochemistry; Instruments & Instrumentation
GA 827IS
UT WOS:000221893500015
ER
PT J
AU Breeze, AJ
Schlesinger, Z
Carter, SA
Tillmann, H
Horhold, HH
AF Breeze, AJ
Schlesinger, Z
Carter, SA
Tillmann, H
Horhold, HH
TI Improving power efficiencies in polymer - polymer blend photovoltaics
SO SOLAR ENERGY MATERIALS AND SOLAR CELLS
LA English
DT Article
DE polymer solar cells; polymer blends; charge transport; carrier mobility;
exciton dissociation; M3EH-PPV; CN-ether-PPV; titanium dioxide solgel
ID DONOR-ACCEPTOR HETEROJUNCTIONS; LIGHT-EMITTING-DIODES; CHARGE
SEPARATION; CELLS; SENSITIZATION; CONVERSION; COMPOSITES; TRANSPORT;
DEVICES
AB The use of blends of electron and hole transporting polymers has been shown to increase exciton dissociation and efficiency in polymer-based photovoltaics. We compare plain M3EH-PPV devices to M3EH-PPV:CN-ether-PPV blend devices, demonstrating the improved performance of blends. We vary the polymer layer thickness and device electrodes for M3EH-PPV:CN-ether-PPV polymer blend devices to investigate the factors limited device efficiency. We find that although the blends allow exciton dissociation to take place throughout the polymer layer, these devices are still limited by transport properties rather than by light absorption. Our best blend device, made with indium-tin oxide and Ca electrodes, gives a power conversion efficiency eta(p) = 1.0%. (C) 2004 Published by Elsevier B.V.
C1 Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA.
Natl Renewable Energy Lab, Golden, CO 80401 USA.
Univ Jena, D-6900 Jena, Germany.
RP Carter, SA (reprint author), Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA.
EM sacarter@cats.ucsc.edu
NR 22
TC 68
Z9 72
U1 0
U2 10
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 JUN 15
PY 2004
VL 83
IS 2-3
BP 263
EP 271
DI 10.1016/j.solmat.2004.02.029
PG 9
WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied
SC Energy & Fuels; Materials Science; Physics
GA 828WU
UT WOS:000222005200010
ER
PT J
AU Loewen, EP
Bisanz, GN
Gilbert, KL
AF Loewen, EP
Bisanz, GN
Gilbert, KL
TI Formation of iron arsenide films on steel substrates from exposure to
molten lead
SO THIN SOLID FILMS
LA English
DT Article
DE arsenic; iron; lead; growth mechanism
ID TRANSMISSION ELECTRON-MICROSCOPY; CORROSION; TESTS; FEAS
AB This paper reports a mechanism for the formation of iron-arsenide films on metal substrates in the presence of molten lead (2-wt.% antimony and 0.3-wt.% arsenic). When iron samples were exposed to flowing molten lead at 500 degreesC for 100 h, an iron-arsenide film (approx. 40 mum) formed on the substrate. The film is composed of two layers: an outer-most layer approaching stoichiometric composition of iron-arsenide, and an inner layer a mixture of Fe-As-Sb-Pb. An abrupt change in elemental composition and texture is observed between the two layers. Film growth resulted in no obvious dimensional change in the substrate. Optimal film growth occurred at an oxygen potential of p(O2) similar to 10(-40) atm. (C) 2003 Elsevier B.V. All rights reserved.
C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA.
Oakland Univ, Dept Mech Engn, Rochester, MI 48309 USA.
RP Loewen, EP (reprint author), Idaho Natl Engn & Environm Lab, POB 1625 MS 3860, Idaho Falls, ID 83415 USA.
EM loewep@inel.gov; george_bisanz@hotmail.com; gkl@inel.gov
NR 19
TC 2
Z9 2
U1 0
U2 3
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 JUN 15
PY 2004
VL 457
IS 2
BP 313
EP 319
DI 10.1016/j.tsf.2003.11.299
PG 7
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 826VT
UT WOS:000221858300012
ER
PT J
AU Wieczorek, S
Chow, WW
Lee, SR
Fischer, AJ
Allerman, AA
Crawford, MH
AF Wieczorek, S
Chow, WW
Lee, SR
Fischer, AJ
Allerman, AA
Crawford, MH
TI Analysis of optical emission from high-aluminum AlGaN quantum-well
structures
SO APPLIED PHYSICS LETTERS
LA English
DT Article
AB The letter presents theoretical analysis of spontaneous emission in AlGaN wurtzite quantum wells. It is found that the combined effects of strain, internal electric field, and many-body Coulomb interactions lead to a significant dependence of optical properties on quantum-well configuration. In particular, the effects of the internal electric field are mitigated for certain Al concentration in the quantum well. Calculations of the emitted photon energy show good agreement with experimental measurements. Presented results are of interest for applications such as ultraviolet light-emitting diodes and lasers. (C) 2004 American Institute of Physics.
C1 Sandia Natl Labs, Semicond Mat & Device Sci Dept, Albuquerque, NM 87185 USA.
RP Wieczorek, S (reprint author), Sandia Natl Labs, Semicond Mat & Device Sci Dept, POB 5800, Albuquerque, NM 87185 USA.
EM smwiecz@sandia.gov
NR 12
TC 7
Z9 7
U1 1
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUN 14
PY 2004
VL 84
IS 24
BP 4899
EP 4901
DI 10.1063/1.1763211
PG 3
WC Physics, Applied
SC Physics
GA 825YA
UT WOS:000221793600021
ER
PT J
AU Ganan-Calvo, AM
Fernandez, JM
Oliver, AM
Marquez, M
AF Ganan-Calvo, AM
Fernandez, JM
Oliver, AM
Marquez, M
TI Coarsening of monodisperse wet microfoams
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID AQUEOUS FOAMS; DRAINAGE; DYNAMICS; KINETICS
AB We report experiments on the aging of monodisperse wet microfoams. We use the flow focusing technique to produce perfectly monodisperse microbubbles from 50 to 80 mum in diameter. This results in a foam of spherical bubbles of the same size ordered in random ordered lattices like "crystal grains" above the foam/liquid interface. We observe two different behaviors while the foam drains without any interference. At early times, the foam bubble size is almost constant from 10 to 20 min depending on the initial diameter of the bubbles. For longer times, the foam reaches a scaling state where the bubbles mean diameter growth agrees with the theoretical prediction t(1/3). (C) 2004 American Institute of Physics.
C1 Univ Sevilla, Escuela Super Ingn, Grp Mecan Fluidos, Seville 41092, Spain.
LANL, CS DO, Los Alamos, NM 87545 USA.
Krafts Foods R&D, Glenview, IL USA.
RP Ganan-Calvo, AM (reprint author), Univ Sevilla, Escuela Super Ingn, Grp Mecan Fluidos, Ave Sexcubrimientos S-N, Seville 41092, Spain.
EM alfonso@eurus2.us.es
RI Ganan-Calvo, Alfonso/F-1169-2013; Martinez Fernandez, Julian/K-1826-2012
OI Martinez Fernandez, Julian/0000-0002-1199-6638
NR 16
TC 26
Z9 28
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUN 14
PY 2004
VL 84
IS 24
BP 4989
EP 4991
DI 10.1063/1.1762992
PG 3
WC Physics, Applied
SC Physics
GA 825YA
UT WOS:000221793600051
ER
PT J
AU Alexandrova, AN
Zhai, HJ
Wang, LS
Boldyrev, AI
AF Alexandrova, AN
Zhai, HJ
Wang, LS
Boldyrev, AI
TI Molecular wheel B-8(2-) as a new inorganic ligand. Photoelectron
spectroscopy and ab initio characterization of LiB8-
SO INORGANIC CHEMISTRY
LA English
DT Article
ID TRANSITION-METAL CLUSTERS; B-B DISTANCES; ELECTRONIC-STRUCTURE; BORON
CLUSTERS; BASIS-SETS; AROMATICITY; PLANARITY; ATOMS; ANTIAROMATICITY;
APPROXIMATION
AB The bare B-8 cluster was previously reported to be a D-7h molecular wheel with a triplet group state. The B-8(2-) dianion was predicted to be a closed-shell singlet and double aromatic D7h molecular wheel. Here we report the experimental observation of B-8(2-) stabilized by a Li+ cation in LiB8- and its experimental characterization using photoelectron spectroscopy. Theoretical searches lead to a C-7v LiB8- global minimum structure, and its calculated photodetachment transitions are in good agreement with the experimental values. Except for a small out-of-plane distortion due to the asymmetric Li+ capping, the B-8(2-) unit in LiB8- is nearly identical to the bare B-8(2-), suggesting it is a robust and stable structural unit and may be used as a new ligand and building block in chemistry.
C1 Washington State Univ, Dept Phys, Richland, WA 99352 USA.
Utah State Univ, Dept Chem & Biochem, Logan, UT 84322 USA.
Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352 USA.
RP Wang, LS (reprint author), Washington State Univ, Dept Phys, 2710 Univ Dr, Richland, WA 99352 USA.
EM ls.wang@pnl.gov; boldyrev@cc.usu.edu
RI Boldyrev, Alexander/C-5940-2009
OI Boldyrev, Alexander/0000-0002-8277-3669
NR 40
TC 97
Z9 98
U1 1
U2 23
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 JUN 14
PY 2004
VL 43
IS 12
BP 3552
EP 3554
DI 10.1021/ic049706a
PG 3
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 828QY
UT WOS:000221989000001
PM 15180405
ER
PT J
AU Li, B
Corbett, JD
AF Li, B
Corbett, JD
TI Synthesis, structure, and characterization of a cubic thallium cluster
phase of the Bergman type, Na-13(Cd similar to Tl-0.70 similar
to(0.30))27
SO INORGANIC CHEMISTRY
LA English
DT Article
ID QUASI-CRYSTALLINE APPROXIMANTS; METALLIC ZINTL PHASE;
ELECTRONIC-STRUCTURE; SOLID-STATE; COMPOUND; CS; RB; ICOSAHEDRA;
CHEMISTRY; POLYANION
AB Samples of Na-13(Cd1-xTlx)(27) crystallize with a cubic Bergman-type Im (3) over bar structure (formerly called the R-phase) (Z = 4, a similar or equal to 15.92 Angstrom) and exhibit a small phase width, 0.24 < x < 0.33. The crystal structure exhibits a Cd/Tl (=M) network of concentric empty M-12 and Cd-12 icosahedra and M-60 buckyball clusters, with the sodium cations in the annuli between clusters. The compound is unusually electron deficient with respect to electron counting rules applied to most Bergman phases with less electropositive cations, and because of the sodium component it is probably better described as an electron-poor Zintl phase. The new compound is metallic according to both EHTB band calculations for the anion and the measured resistivities and magnetic susceptibilities. Site preferences observed for Na, Cd, and Tl among the seven crystallographic sites are consistent with their relative Mulliken electron populations.
C1 Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ, Dept Chem, Ames, IA 50011 USA.
RP Corbett, JD (reprint author), Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA.
EM jcorbett@iastate.edu
NR 48
TC 22
Z9 22
U1 0
U2 3
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 JUN 14
PY 2004
VL 43
IS 12
BP 3582
EP 3587
DI 10.1021/ic0400033
PG 6
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 828QY
UT WOS:000221989000006
PM 15180410
ER
PT J
AU Fu, YJ
Yang, X
Wang, XB
Wang, LS
AF Fu, YJ
Yang, X
Wang, XB
Wang, LS
TI Terminal ligand influence on the electronic structure and intrinsic
redox properties of the [Fe4S4](2+) cubane clusters
SO INORGANIC CHEMISTRY
LA English
DT Article
ID IRON-SULFUR CLUSTERS; X-RAY-ABSORPTION; PYROCOCCUS-FURIOSUS FERREDOXIN;
MULTIPLY-CHARGED ANIONS; PHOTODETACHMENT PHOTOELECTRON-SPECTROSCOPY;
REPULSIVE COULOMB BARRIER; SITE-DIRECTED MUTAGENESIS; 4FE-4S CLUSTER;
SYNTHETIC ANALOGS; ACTIVE-SITES
AB We used photoelectron spectroscopy (PES) to study how the terminal ligands influence the electronic structure and redox properties of the [4Fe-4S] cubane in several series of ligand-substituted analogue complexes: [Fe4S4Cl4-x(CN)(x)](2-), [Fe4S4Cl4-x(SCN)(x)](2-), [Fe4S4Cl4-x(OAc)(x)](2-), [Fe4S4(SC2H5)(4-x)(OPr)(x)](2-), and [Fe4S4(SC2H5)(4-x)Cl-x](2-) (x = 0-4). All the ligand-substituted complexes gave similar PES spectral features as the parents, suggesting that the mixed-ligand coordination does not perturb the electronic structure of the cubane core significantly. The terminal ligands, however, have profound effects on the electron binding energies of the cubane and induce significant shifts of the PES spectra, increasing in the order SC2H5- --> Cl- --> OAc-/OPr- --> CN- --> SCN-. A linear relationship between the electron binding energies and the substitution number x was observed for each series, indicating that each ligand contributes independently and additively to the total binding energy. The electron binding energies of the gaseous complexes represent their intrinsic oxidation energies; the observed linear dependence on x is consistent with similar observations on the redox potentials of mixed-ligand cubane complexes in solution. The current study reveals the electrostatic nature of the interaction between the [4Fe-4S] cubane core and its coordination environment and provides further evidence for the electronic and structural stability of the cubane core and its robustness as a structural and functional unit in Fe-S proteins.
C1 Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352 USA.
Washington State Univ, Dept Phys, Richland, WA 99352 USA.
RP Wang, LS (reprint author), Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, POB 999, Richland, WA 99352 USA.
EM ls.wang@pnl.gov
FU NIGMS NIH HHS [GM-63555]
NR 61
TC 11
Z9 11
U1 1
U2 11
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 JUN 14
PY 2004
VL 43
IS 12
BP 3647
EP 3655
DI 10.1021/ic0495261
PG 9
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 828QY
UT WOS:000221989000015
PM 15180419
ER
PT J
AU Krstic, PS
AF Krstic, PS
TI Coupled channel representation of the advanced adiabatic approach
SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
LA English
DT Article
ID ELECTRON-CAPTURE; COLLISIONS; IONS; HYDROGEN; IONIZATION; EXCITATION;
ENERGIES; ATOM
AB A treatment of the heavy particle collision dynamics in a form of molecular orbital coupled channel approach, emerging from the hidden crossings topology of the complex adiabatic eigenenergy surface, is proposed. We show how this can be self-consistently adjusted for application in the nearly adiabatic limit of collision energies. The method is tested for the charge transfer process in He2++H collisions, in a range of 10-400 eV/u collision energies. Excellent agreement of the partial and total cross sections with other accurate theories and experiments is shown, and comparative advantages of the method are discussed.
C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RP Krstic, PS (reprint author), Oak Ridge Natl Lab, Div Phys, POB 2008, Oak Ridge, TN 37831 USA.
NR 25
TC 13
Z9 13
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-4075
J9 J PHYS B-AT MOL OPT
JI J. Phys. B-At. Mol. Opt. Phys.
PD JUN 14
PY 2004
VL 37
IS 11
BP L217
EP L225
AR PII S0953-4075(04)76627-4
DI 10.1088/0953-4075/37/11/L01
PG 9
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 853DZ
UT WOS:000223808000001
ER
PT J
AU Krassnigg, A
Roberts, CD
AF Krassnigg, A
Roberts, CD
TI Dyson-Sschwinger equations: An instrument for hadron physics
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 17th IInternational Conference on Few-Body Problems in Physics (Few-Body
17)
CY JUN 05-10, 2003
CL Durham, NC
ID SCHWINGER EQUATIONS; PION; QCD; CONFINEMENT; MASS
C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Krassnigg, A (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
OI Roberts, Craig/0000-0002-2937-1361
NR 29
TC 11
Z9 11
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD JUN 14
PY 2004
VL 737
BP 7
EP 15
DI 10.1016/j.nuclphysa.2004.03.039
PG 9
WC Physics, Nuclear
SC Physics
GA 829IS
UT WOS:000222042000003
ER
PT J
AU Carlson, J
AF Carlson, J
TI Electroweak processes in few-body nuclei
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Few-Body Problems in Physics (Few-Body
17)
CY JUN 05-10, 2003
CL Durham, NC
ID DEUTERON
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Carlson, J (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
NR 16
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD JUN 14
PY 2004
VL 737
BP 77
EP 84
DI 10.1016/j.nuclphysa.2004.03.047
PG 8
WC Physics, Nuclear
SC Physics
GA 829IS
UT WOS:000222042000011
ER
PT J
AU Gilman, R
AF Gilman, R
TI Deuteron elastic scattering, photo- and electro- disintegration
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 17th IInternational Conference on Few-Body Problems in Physics (Few-Body
17)
CY JUN 05-10, 2003
CL Durham, NC
ID PHOTODISINTEGRATION; ELECTRODISINTEGRATION; ASYMMETRY
C1 Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
Jefferson Lab, Newport News, VA 23606 USA.
RP Gilman, R (reprint author), Rutgers State Univ, Dept Phys & Astron, 136 Frelinghuysen Rd, Piscataway, NJ 08854 USA.
NR 47
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD JUN 14
PY 2004
VL 737
BP 156
EP 164
DI 10.1016/j.nuclphysa.2004.03.057
PG 9
WC Physics, Nuclear
SC Physics
GA 829IS
UT WOS:000222042000021
ER
PT J
AU Edwards, RG
Fiebig, HR
Fleming, G
Richards, DG
AF Edwards, RG
Fiebig, HR
Fleming, G
Richards, DG
TI Lattice QCD and nucleon resonances
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 17th IInternational Conference on Few-Body Problems in Physics (Few-Body
17)
CY JUN 05-10, 2003
CL Durham, NC
ID FERMIONS
C1 Jefferson Lab, Newport News, VA 23606 USA.
Florida Int Univ, Dept Phys, Miami, FL 33199 USA.
RP Edwards, RG (reprint author), Jefferson Lab, MS 12H2,12000 Jefferson Ave, Newport News, VA 23606 USA.
RI Fleming, George/L-6614-2013
OI Fleming, George/0000-0002-4987-7167
NR 16
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD JUN 14
PY 2004
VL 737
BP 167
EP 171
DI 10.1016/j.nuclphysa.2004.03.058
PG 5
WC Physics, Nuclear
SC Physics
GA 829IS
UT WOS:000222042000022
ER
PT J
AU Bedaque, PF
AF Bedaque, PF
TI Model independency and three-particle systems
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 17th IInternational Conference on Few-Body Problems in Physics (Few-Body
17)
CY JUN 05-10, 2003
CL Durham, NC
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Bedaque, PF (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd,MS 70R0319, Berkeley, CA 94720 USA.
NR 2
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD JUN 14
PY 2004
VL 737
BP 195
EP 199
DI 10.1016/j.nuclphysa.2004.03.063
PG 5
WC Physics, Nuclear
SC Physics
GA 829IS
UT WOS:000222042000027
ER
PT J
AU Nogga, A
Epelbaum, E
Navratil, P
Glockle, W
Kamada, H
Meissner, UG
Witala, H
Barrett, BR
Vary, JP
AF Nogga, A
Epelbaum, E
Navratil, P
Glockle, W
Kamada, H
Meissner, UG
Witala, H
Barrett, BR
Vary, JP
TI Probing chiral interactions in light nuclei
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 17th IInternational Conference on Few-Body Problems in Physics (Few-Body
17)
CY JUN 05-10, 2003
CL Durham, NC
ID EFFECTIVE-FIELD THEORY; FORCES; LAGRANGIANS; SYSTEMS
C1 Univ Arizona, Tucson, AZ 85721 USA.
Ruhr Univ Bochum, D-4630 Bochum, Germany.
Lawrence Livermore Natl Lab, Livermore, CA USA.
Kyushu Inst Technol, Kitakyushu, Fukuoka 804, Japan.
Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-5300 Bonn, Germany.
Jagiellonian Univ, PL-31007 Krakow, Poland.
Iowa State Univ, Ames, IA USA.
RP Nogga, A (reprint author), Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA.
RI Nogga, Andreas/A-3354-2008
OI Nogga, Andreas/0000-0003-2156-748X
NR 12
TC 14
Z9 14
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD JUN 14
PY 2004
VL 737
BP 236
EP 240
DI 10.1016/j.nuclphysa.2004.03.082
PG 5
WC Physics, Nuclear
SC Physics
GA 829IS
UT WOS:000222042000034
ER
PT J
AU Hwang, WYP
Lee, TSH
Ma, BQ
AF Hwang, WYP
Lee, TSH
Ma, BQ
TI A replay of few-body reactions in particle cosmology
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 17th IInternational Conference on Few-Body Problems in Physics (Few-Body
17)
CY JUN 05-10, 2003
CL Durham, NC
ID COSMIC-RAY SPECTRUM
C1 Natl Taiwan Univ, Inst Astrophys, Taipei 106, Taiwan.
Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan.
Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
Peking Univ, Sch Phys, Inst Theoret Phys, Beijing 100871, Peoples R China.
RP Hwang, WYP (reprint author), Natl Taiwan Univ, Inst Astrophys, Taipei 106, Taiwan.
OI HWANG, W-Y/0000-0003-1563-8683
NR 11
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD JUN 14
PY 2004
VL 737
BP 294
EP 297
DI 10.1016/j.nuclphysa.2004.03.091
PG 4
WC Physics, Nuclear
SC Physics
GA 829IS
UT WOS:000222042000043
ER
PT J
AU de Jager, K
AF de Jager, K
TI Research perspectives at Jefferson lab: 12 GeV and beyond
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 17th IInternational Conference on Few-Body Problems in Physics (Few-Body
17)
CY JUN 05-10, 2003
CL Durham, NC
C1 Jefferson Lab, Newport News, VA 23606 USA.
RP de Jager, K (reprint author), Jefferson Lab, Newport News, VA 23606 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD JUN 14
PY 2004
VL 737
BP 301
EP 305
DI 10.1016/j.nuclphysa.2004.03.092
PG 5
WC Physics, Nuclear
SC Physics
GA 829IS
UT WOS:000222042000044
ER
PT J
AU Schmidt-Bocking, H
Dorner, R
Jagutzki, O
Jahnke, T
Mergel, V
Schmidt, H
Weber, T
Czasch, A
Wimmer, C
Hattass, M
Knapp, A
Schoffler, M
Cocke, CL
Prior, M
Kheifets, A
Weigold, E
Afaneh, F
AF Schmidt-Bocking, H
Dorner, R
Jagutzki, O
Jahnke, T
Mergel, V
Schmidt, H
Weber, T
Czasch, A
Wimmer, C
Hattass, M
Knapp, A
Schoffler, M
Cocke, CL
Prior, M
Kheifets, A
Weigold, E
Afaneh, F
TI Many-particle dynamics in atomic and molecular physics investigated with
the COLTRIMS-technique: New inside into e-e- correlation
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 17th IInternational Conference on Few-Body Problems in Physics (Few-Body
17)
CY JUN 05-10, 2003
CL Durham, NC
ID ION MOMENTUM SPECTROSCOPY; RECOIL-ION; MICROSCOPE
C1 Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany.
Kansas State Univ, Manhattan, KS 66506 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
Australian Natl Univ, Res Sch Phys Sci & Engn, Canberra, ACT 0200, Australia.
Hashemite Univ, Dept Phys, Zarqa 13115, Jordan.
RP Schmidt-Bocking, H (reprint author), Univ Frankfurt, Inst Kernphys, August Euler Str 6, D-60486 Frankfurt, Germany.
RI Schoeffler, Markus/B-6261-2008; Doerner, Reinhard/A-5340-2008; Weber,
Thorsten/K-2586-2013
OI Schoeffler, Markus/0000-0001-9214-6848; Doerner,
Reinhard/0000-0002-3728-4268; Weber, Thorsten/0000-0003-3756-2704
NR 10
TC 3
Z9 3
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD JUN 14
PY 2004
VL 737
BP 306
EP 313
DI 10.1016/j.nuclphysa.2004.03.093
PG 8
WC Physics, Nuclear
SC Physics
GA 829IS
UT WOS:000222042000045
ER
PT J
AU Bezrukov, S
Elsasser, R
Monien, B
Preis, R
Tillich, JP
AF Bezrukov, S
Elsasser, R
Monien, B
Preis, R
Tillich, JP
TI New spectral lower bounds on the bisection width of graphs
SO THEORETICAL COMPUTER SCIENCE
LA English
DT Article
DE graph bisection; laplacian of graphs; eigenvalues of graphs
ID RAMANUJAN GRAPHS; ISOPERIMETRIC NUMBER; EIGENVECTORS; MATRICES
AB The communication overhead is a major bottleneck for the execution of a process graph on a parallel computer system. In the case of two processors, the minimization of the communication can be modeled using the graph bisection problem. The spectral lower bound of lambda(2)\V\/4 for the bisection width of a graph is widely known. The bisection width is equal to lambda(2)\V\/4 iff all vertices are incident to lambda(2)/2 cut edges in every optimal bisection.
We present a new method of obtaining tighter lower bounds on the bisection width. This method makes use of the level structure defined by the bisection. We define some global expansion proper-ties and we show that the spectral lower bound increases with this global expansion. Under certain conditions we obtain a lower bound depending on lambda(2)(beta)\V\ with 1/2 less than or equal to beta < 1. We also present examples of graphs for which our new bounds are tight UP to a Constant factor. As a by-product, we derive new lower bounds for the bisection widths of 3- and 4-regular Ramanujan graphs. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ Paderborn, Inst Comp Sci, D-33102 Paderborn, Germany.
Univ Wisconsin, Superior, WI USA.
Sandia Natl Labs, Albuquerque, NM 87185 USA.
LRI, Orsay, France.
RP Univ Paderborn, Inst Comp Sci, D-33102 Paderborn, Germany.
EM sb@math.uwsuper.edu; elsa@upb.de; bm@upb.de; robsy@upb.de;
tillich@lri.fr
NR 22
TC 5
Z9 6
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3975
EI 1879-2294
J9 THEOR COMPUT SCI
JI Theor. Comput. Sci.
PD JUN 14
PY 2004
VL 320
IS 2-3
BP 155
EP 174
DI 10.1016/j.tcs.2004.03.059
PG 20
WC Computer Science, Theory & Methods
SC Computer Science
GA 827XC
UT WOS:000221936000001
ER
PT J
AU Balasubramanian, K
AF Balasubramanian, K
TI Group theoretical analysis of vibrational modes and rovibronic levels of
extended aromatic C48N12 azafullerene
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID NUCLEAR-SPIN STATISTICS; FULLERENES; BUCKMINSTERFULLERENE; MOLECULES;
C60
AB We have presented a group theoretical analysis of the vibrational normal modes and rovibronic levels of a novel extended aromatic C48N12 azafullerene. We have also predicted the properties of the (3)A(u), E-3(g), and E-3(u). excited states Of C48N12 that lie 1.9 eV above the (1)A(g) ground state, and that the E-3(g) and E-3(u) states would undergo Jahn-Teller distortion into chiral structures with no symmetry and an achiral structure with C-i symmetry. The correlation of the rovibronic and rotational levels and their relation to the parent I-h symmetry are presented through induced and subduced representations. (C) 2004 Published by Elsevier B.V.
C1 Univ Calif Davis, Dept Appl Sci, Ctr Image Proc & Integrated Computing, Livermore, CA 94550 USA.
Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Glenn T Seaborg Ctr, Berkeley, CA 94720 USA.
RP Balasubramanian, K (reprint author), Univ Calif Davis, Dept Appl Sci, Ctr Image Proc & Integrated Computing, L-794, Livermore, CA 94550 USA.
EM kbala@ucdavis.edu
NR 35
TC 36
Z9 36
U1 0
U2 2
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 JUN 11
PY 2004
VL 391
IS 1-3
BP 64
EP 68
DI 10.1016/j.cplett.2004.04.087
PG 5
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 828MN
UT WOS:000221977500012
ER
PT J
AU Balasubramanian, K
AF Balasubramanian, K
TI Nuclear spin statistics of extended aromatic C48N12 azafullerene
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID SPECTROSCOPY; NMR; C60
AB We have presented the nuclear spin statistics of the novel extended aromatic C48N12 azafullerene. The nuclear spin multiplets and statistical weights of N-14 spin-I bosons are provided. In addition, we have also provided the C-13 nuclear spin species and spin statistical weights of (C48N12)-C-13. The spin statistical weights and spin species show that the presence of N-14 nuclei in the aromatic fullerene can provide unique experimental opportunity to investigate the nuclear spin species. (C) 2004 Published by Elsevier B.V.
C1 Univ Calif Davis, Dept Appl Sci, Ctr Image Proc & Integrated Computing, Livermore, CA 94550 USA.
Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Glenn T Seaborg Ctr, Berkeley, CA 94720 USA.
RP Balasubramanian, K (reprint author), Univ Calif Davis, Dept Appl Sci, Ctr Image Proc & Integrated Computing, L-794, Livermore, CA 94550 USA.
EM kbala@ucdavis.edu
NR 26
TC 29
Z9 29
U1 1
U2 3
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 JUN 11
PY 2004
VL 391
IS 1-3
BP 69
EP 74
DI 10.1016/j.cplett.2004.04.086
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 828MN
UT WOS:000221977500013
ER
PT J
AU Eken, T
Mayeda, K
Hofstetter, A
Gok, R
Orgulu, G
Turkelli, N
AF Eken, T
Mayeda, K
Hofstetter, A
Gok, R
Orgulu, G
Turkelli, N
TI An application of the coda methodology for moment-rate spectra using
broadband stations in Turkey
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID UNITED-STATES EARTHQUAKES; WAVES
AB A recently developed coda magnitude methodology was applied to selected broadband stations in Turkey for the purpose of testing the coda method in a large, laterally complex region. As found in other, albeit smaller regions, coda envelope amplitude measurements are significantly less variable than distance-corrected direct wave measurements (i.e., L-g and surface waves) by roughly a factor 3-to-4. Despite strong lateral crustal heterogeneity in Turkey, we found that the region could be adequately modeled assuming a simple 1-D, radially symmetric path correction. After calibrating the stations ISP, ISKB, and MALT for local and regional distances, single-station moment-magnitude estimates (M-w) derived from the coda spectra were in excellent agreement with those determined from multi-station waveform modeling inversions, exhibiting a data standard deviation of 0.17. Though the calibration was validated using large events, the results of the calibration will extend M-w estimates to significantly smaller events which could not otherwise be waveform modeled. The successful application of the method is remarkable considering the significant lateral complexity in Turkey and the simple assumptions used in the coda method.
C1 Bogazici Univ, Kandilli Observ, TR-81220 Istanbul, Turkey.
Bogazici Univ, Earthquake Res Inst, TR-81220 Istanbul, Turkey.
Lawrence Livermore Natl Lab, Div Earth Sci, Livermore, CA 94550 USA.
Geophys Inst Israel, IL-58122 Lod, Israel.
RP Bogazici Univ, Kandilli Observ, TR-81220 Istanbul, Turkey.
EM gok1@llnl.gov
RI Gok, Rengin/O-6639-2014
NR 14
TC 11
Z9 11
U1 0
U2 6
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 JUN 11
PY 2004
VL 31
IS 11
AR L11609
DI 10.1029/2004GL019627
PG 4
WC Geosciences, Multidisciplinary
SC Geology
GA 829XM
UT WOS:000222085000002
ER
PT J
AU Posewitz, MC
King, PW
Smolinski, SL
Zhang, LP
Seibert, M
Ghirardi, ML
AF Posewitz, MC
King, PW
Smolinski, SL
Zhang, LP
Seibert, M
Ghirardi, ML
TI Discovery of two novel radical S-adenosylmethionine proteins required
for the assembly of an active [Fe] hydrogenase
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID ALGA CHLAMYDOMONAS-REINHARDTII; CRYSTAL-STRUCTURE; ESCHERICHIA-COLI;
BIOTIN SYNTHASE; IRON-HYDROGENASE; DESULFOVIBRIO-DESULFURICANS;
THERMOTOGA-MARITIMA; ONLY HYDROGENASE; 4FE-4S CLUSTERS; SITE
AB To identify genes necessary for the photoproduction of H-2 in Chlamydomonas reinhardtii, random insertional mutants were screened for clones unable to produce H-2. One of the identified mutants, denoted hydEF-1, is incapable of assembling an active [Fe] hydrogenase. Although the hydEF-1 mutant transcribes both hydrogenase genes and accumulates full-length hydrogenase protein, H-2 production activity is not observed. The HydEF protein contains two unique domains that are homologous to two distinct prokaryotic proteins, HydE and HydF, which are found exclusively in organisms containing [Fe] hydrogenase. In the C. reinhardtii genome, the HydEF gene is adjacent to another hydrogenase-related gene, HydG. All organisms with [Fe] hydrogenase and sequenced genomes contain homologues of HydE, HydF, and HydG, which, prior to this study, were of unknown function. Within several prokaryotic genomes HydE, HydF, and HydG are found in putative operons with [Fe] hydrogenase structural genes. Both HydE and HydG belong to the emerging radical S-adenosylmethionine (commonly designated "Radical SAM") superfamily of proteins. We demonstrate here that HydEF and HydG function in the assembly of [Fe] hydrogenase. Northern blot analysis indicates that mRNA transcripts for both the HydEF gene and the HydG gene are anaerobically induced concomitantly with the two C. reinhardtii [Fe] hydrogenase genes, HydA1 and HydA2. Complementation of the bx;1C. reinhardtii hydEF-1 mutant with genomic DNA corresponding to a functional copy of the HydEF gene restores hydrogenase activity. Moreover, co-expression of the C. reinhardtii HydEF, HydG, and HydA1 genes in Escherichia coli results in the formation of an active HydA1 enzyme. This represents the first report on the nature of the accessory genes required for the maturation of an active [Fe] hydrogenase.
C1 Colorado Sch Mines, Natl Renewable Energy Lab, Golden, CO 80401 USA.
Colorado Sch Mines, Dept Environm Sci & Engn, Golden, CO 80401 USA.
RP Ghirardi, ML (reprint author), Colorado Sch Mines, Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM maria_ghirardi@nrel.gov
RI King, Paul/D-9979-2011
OI King, Paul/0000-0001-5039-654X
NR 47
TC 236
Z9 246
U1 3
U2 19
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 JUN 11
PY 2004
VL 279
IS 24
BP 25711
EP 25720
DI 10.1074/jbc.M403206200
PG 10
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 826KL
UT WOS:000221827900101
PM 15082711
ER
PT J
AU Fritz, JS
AF Fritz, JS
TI Early milestones in the development of ion-exchange chromatography: a
personal account
SO JOURNAL OF CHROMATOGRAPHY A
LA English
DT Article; Proceedings Paper
CT 16th International Ion Chromography Symposium
CY SEP 21-24, 2003
CL San Diego, CA
DE reviews; ion-exchange chromatography; ion chromatography
ID FLOW LIQUID CHROMATOGRAPHY; LOW-CONDUCTIVITY ELUENTS; CATION-EXCHANGE;
ANION-EXCHANGE; METAL-IONS; DISTRIBUTION COEFFICIENTS; SEPARATION;
RESINS; ACID; LANTHANIDES
AB Ion chromatography as we know it today was built on a foundation of knowledge accumulated over a period of many years. Here, we review some of the outstanding earlier achievements in ion-exchange chromatography. Be.-inning about 1947, Spedding and Powell at Iowa State published a series of papers describing practical methods for preparative separation of the rare earths by displacement ion-exchange chromatography. The same group then demonstrated the ion-exchange separation of N-14 and N-15 isotopes in ammonia. Beginning in the 1950s, Kraus and Nelson at Oak Ridge published numerous analytical methods for metal ions based on separation of their chloride, fluoride, nitrate or sulfate complexes by anion chromatography. In the period from about 1960 to 1980 many clever chromatographic methods for metal ion separations were reported by researchers throughout the world and automatic in-line detection was gradually introduced. A truly innovative method by Small, Stevens and Bauman at Dow Chemical Co. marked the birth of modern ion chromatography. Anions, as well as cations, could now be separated quickly and conveniently by a system of suppressed conductivity detection. A method for anion chromatography with non-suppressed conductivity detection was published by Gjerde et al. in 1979. This was followed by a similar method for cation chromatography in 1980. Ion chromatography as we know it today did not just happen. It was built on a solid foundation of knowledge that has accumulated over a period of many years. Revisiting the older ion-exchange chromatography serves not only to pay tribute to some remarkable accomplishments, but it can also be a learning experience. Trends and ideas in science tend to run in repeating cycles. Thus, an awareness of older work may provide inspiration for new research using improved contemporary technology. Selection of milestones is a rather personal matter. I chose to write about subjects of which I came to have a firsthand knowledge during my career. The topics selected are in roughly chronological order and cover the period from about 1945 to 1980. An effort has been made to explain the chemical principles as well as to recount the major accomplishments of the various research projects. (C) 2004 Elsevier B.V. All rights reserved.
C1 Iowa State Univ, Dept Chem, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ, Dept Chem, US Dept Energy, Ames, IA 50011 USA.
RP Fritz, JS (reprint author), Iowa State Univ, Dept Chem, Ames Lab, 332 Wilhelm Hall, Ames, IA 50011 USA.
EM kniss@ameslab.gov
NR 31
TC 14
Z9 15
U1 6
U2 59
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0021-9673
J9 J CHROMATOGR A
JI J. Chromatogr. A
PD JUN 11
PY 2004
VL 1039
IS 1-2
BP 3
EP 12
DI 10.1016/j.chroma.2003.12.068
PG 10
WC Biochemical Research Methods; Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA 825OY
UT WOS:000221769000002
PM 15250395
ER
PT J
AU Steiner, SA
Hooker, J
Dederich, J
Scott, B
Fritz, JS
AF Steiner, SA
Hooker, J
Dederich, J
Scott, B
Fritz, JS
TI Capillary electrophoresis of organic cations at high salt concentrations
SO JOURNAL OF CHROMATOGRAPHY A
LA English
DT Article; Proceedings Paper
CT 16th International Ion Chromography Symposium
CY SEP 21-24, 2003
CL San Diego, CA
DE background electrolyte composition; anilines; amines
ID IONIC POLYMER LAYERS; ZONE ELECTROPHORESIS; ANIONS; SEPARATION;
PROTEINS; STRENGTH; SAMPLES; ACID
AB At concentrations of 100mM or higher the chemical nature of both the cation and anion in the background electrolyte (BGE) can be varied to manipulate the migration times of protonated aniline cations. Significant differences were noted with Li+, Na+ and K+ for capillary electrophoretic runs carried out at pH 3. However, much greater differences in migration times were observed at acidic pH values when the BGE contained protonated cations of aliphatic amines. Analyte migration became progressively slower in the series: methylamine, diethylamine, diethylamino ethanol and triethylamine. A major part of this effect was attributed to an opposing electroosmotic flow (EOF) resulting from a positively-charged coating of the capillary surface with the amine cations in the BGE via a dynamic equilibrium. The amine cations also interact in solution with the analyte ions to reduce their electrophoretic mobilities. Migration times of anilines could be varied systematically over a broad range according to the BGE amine cation selected. Excellent separations of seven closely-related anilines were obtained with the new system. (C) 2004 Elsevier B.V. All rights reserved.
C1 Iowa State Univ, US Dept Energy, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ, Dept Chem, Ames Lab, Ames, IA 50011 USA.
Univ Wisconsin, Dept Chem & Engn Phys, Platteville, WI 53818 USA.
RP Fritz, JS (reprint author), Iowa State Univ, US Dept Energy, Ames Lab, Ames, IA 50011 USA.
EM kniss@ameslab.gov
NR 23
TC 7
Z9 7
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0021-9673
J9 J CHROMATOGR A
JI J. Chromatogr. A
PD JUN 11
PY 2004
VL 1039
IS 1-2
BP 227
EP 233
DI 10.1016/j.chroma.2004.03.024
PG 7
WC Biochemical Research Methods; Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA 825OY
UT WOS:000221769000034
PM 15250427
ER
PT J
AU Morosan, E
Bud'ko, SL
Canfield, PC
Torikachvili, MS
Lacerda, AH
AF Morosan, E
Bud'ko, SL
Canfield, PC
Torikachvili, MS
Lacerda, AH
TI Thermodynamic and transport properties of RAgGe (R = Tb-Lu) single
crystals
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article
DE RAgsb; crystal electric field; local moment magnetism; metamagnetism;
heavy fermion
ID METAMAGNETIC TRANSITIONS; MAGNETIC-PROPERTIES; ANGULAR-DEPENDENCE;
LA-ND; FIELD; SUSCEPTIBILITY; TEMPERATURE; ANISOTROPY; HONI2B2C; GROWTH
AB Single crystals of the title compounds were grown out of an AgGe-rich ternary solution. Powder X-ray diffraction data confirmed the hexagonal AlNiZr-type structure (P (6) over bar2 m space group), an ordered variant of the Fe,P structure type. Antiferromagnetic ordering can be inferred from magnetization, resistance and specific heat measurements, with values of T-N between 28.5 K for TbAgGe and 1.0 K for YbAgGe, which scale roughly with the de Gennes factor. Anisotropic M(H) measurements indicate one or more metamagnetic transitions when the external field is applied along the c-axis (for R = Tb) or perpendicular to it (R = Ho, Er, Tin), or even in both orientations as in the case of DyAgGe. Furthermore, the extreme anisotropy of the magnetization in TmAgGe, where magnetic moments lie in the ab-plane, provides the possibility of studying the angular dependence of metamagnetism in hexagonal compounds with the rare earth in orthorhombic point symmetry. YbAgGe has distinct properties from the rest of the series: an enhanced electronic specific heat coefficient gamma approximate to (154.2 +/- 2.5)mJ/mol K-2 and apparently small moment magnetic ordering below 1.0 K. This compound appears to be close to a quantum critical point. (C) 2003 Elsevier B.V. All rights reserved.
C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
San Diego State Univ, Dept Phys, San Diego, CA 92182 USA.
Los Alamos Natl Lab, Los Alamos Facil, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA.
RP Bud'ko, SL (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
EM budko@ameslab.gov
RI Canfield, Paul/H-2698-2014
NR 30
TC 37
Z9 37
U1 0
U2 16
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD JUN 11
PY 2004
VL 277
IS 3
BP 298
EP 321
DI 10.1016/j.jmmm.2003.11.014
PG 24
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 835PW
UT WOS:000222498200009
ER
PT J
AU Camarero, JA
Hackel, BJ
de Yoreo, JJ
Mitchell, AR
AF Camarero, JA
Hackel, BJ
de Yoreo, JJ
Mitchell, AR
TI Fmoc-based synthesis of peptide alpha-thioesters using an aryl hydrazine
support
SO JOURNAL OF ORGANIC CHEMISTRY
LA English
DT Article
ID SOLID-PHASE SYNTHESIS; NATIVE CHEMICAL LIGATION; PROTEIN INHIBITOR
COMPLEXES; C-TERMINAL THIOESTERS; TGF-BETA RECEPTOR; CYCLIC-PEPTIDES;
UNPROTECTED PEPTIDES; ACID-LABILE; AMINO-ACIDS; BACKBONE
AB C-Terminal peptide thioesters are key intermediates in the synthesis/semisynthesis of proteins and of cyclic peptides by native chemical ligation. They are prepared by solid-phase peptide synthesis (SPPS) or biosynthetically by protein splicing techniques. Until recently, the chemical synthesis of C-terminal a-thioester peptides by SPPS was largely restricted to the use of Boc/Benzyl chemistry due to the poor stability of the thioester bond to the basic conditions required for the deprotection of the N-alpha-Fmoc group. In the present work, we describe a new method for the SPPS of C-terminal thioesters using Fmoc/t-Bu chemistry. This method is based on the use of an aryl hydrazine linker, which is totally stable to conditions required for Fmoc-SPPS. When the peptide synthesis has been completed, activation of the linker is achieved by mild oxidation. This step converts the acyl hydrazine group into a highly reactive acyl diazene intermediate which reacts with an a-amino acid alkyl thioester (H-AA-SR) to yield the corresponding peptide a-thioester in good yield. This method has been successfully used to prepare a variety of peptide thioesters, cyclic peptides, and a fully functional Src homology 3 (SH3) protein domain.
C1 Lawrence Livermore Natl Lab, Chem Biol & Nucl Sci Div, Livermore, CA 94550 USA.
RP Camarero, JA (reprint author), Lawrence Livermore Natl Lab, Chem Biol & Nucl Sci Div, 7000 E Ave, Livermore, CA 94550 USA.
EM camarero1@llnl.gov
RI Fitzmaurice, Richard/C-1508-2008; Camarero, Julio/A-9628-2015
NR 68
TC 82
Z9 83
U1 4
U2 13
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0022-3263
J9 J ORG CHEM
JI J. Org. Chem.
PD JUN 11
PY 2004
VL 69
IS 12
BP 4145
EP 4151
DI 10.1021/jo040140h
PG 7
WC Chemistry, Organic
SC Chemistry
GA 826ZK
UT WOS:000221867800018
PM 15176841
ER
PT J
AU Ben-Naim, E
Krapivsky, PL
AF Ben-Naim, E
Krapivsky, PL
TI Random geometric series
SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
LA English
DT Article
ID SEQUENCES
AB Integer sequences where each element is determined by a previous randomly chosen element are investigated analytically. In particular, the random geometric series x(n) = 2x(p) with 0 less than or equal to p less than or equal to n - 1 is studied. At large n, the moments grow algebraically, similar to n(beta(s)) with beta(s) = 2(s) - 1, while the typical behaviour is x(n) similar to n(ln2). The probability distribution is obtained explicitly in terms of the Stirling numbers of the first kind and it approaches a log-normal distribution asymptotically.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
Boston Univ, Ctr Polymer Studies, Boston, MA 02215 USA.
Boston Univ, Dept Phys, Boston, MA 02215 USA.
RP Ben-Naim, E (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RI Ben-Naim, Eli/C-7542-2009; Krapivsky, Pavel/A-4612-2014
OI Ben-Naim, Eli/0000-0002-2444-7304;
NR 16
TC 2
Z9 2
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0305-4470
J9 J PHYS A-MATH GEN
JI J. Phys. A-Math. Gen.
PD JUN 11
PY 2004
VL 37
IS 23
BP 5949
EP 5957
AR PII S0305-4470(04)77258-3
DI 10.1088/0305-4470/37/23/001
PG 9
WC Physics, Multidisciplinary; Physics, Mathematical
SC Physics
GA 836GH
UT WOS:000222543300001
ER
PT J
AU Ino, T
Ooi, M
Kiyanagi, Y
Kasugai, Y
Maekawa, F
Takada, H
Muhrer, G
Pitcher, EJ
Russell, GJ
AF Ino, T
Ooi, M
Kiyanagi, Y
Kasugai, Y
Maekawa, F
Takada, H
Muhrer, G
Pitcher, EJ
Russell, GJ
TI Measurement of neutron beam characteristics at the Manuel Lujan Jr.
neutron scattering center
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE spallation neutron source; thermal neutron; intensity; spectrum; pulse
shape
ID MODERATOR
AB We have measured neutronic performance of the moderators at the Manuel Lujan Jr. Neutron Scattering Center, Los Alamos National Laboratory in order to provide the neutron beam characteristics for the neutron scattering experiments at the Lujan Center as well as to study the validity of neutronic calculation codes. The absolute neutron intensities, the energy spectra, and the neutron pulse shapes (neutron emission time distributions) were measured for the H2O coupled moderator, the high-intensity H2O decoupled moderator, the high-resolution H2O decoupled moderator, and the partially coupled liquid-hydrogen moderator. The overall characteristics of the moderators were found to agree with the designed performance. (C) 2004 Elsevier B.V. All rights reserved.
C1 KEK, Neutron Sci Lab, Inst Mat Struct Sci, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan.
Hokkaido Univ, Sapporo, Hokkaido 0608628, Japan.
Japan Atom Energy Res Inst, Tokai, Ibaraki 3191195, Japan.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Ino, T (reprint author), KEK, Neutron Sci Lab, Inst Mat Struct Sci, High Energy Accelerator Res Org, Oho 1-1, Tsukuba, Ibaraki 3050801, Japan.
EM takashi.ino@kek.jp
RI Lujan Center, LANL/G-4896-2012; Kiyanagi, Yoshiaki/D-7132-2012
NR 14
TC 15
Z9 15
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD JUN 11
PY 2004
VL 525
IS 3
BP 496
EP 510
DI 10.1016/j.nima.2004.02.003
PG 15
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 831XF
UT WOS:000222229300007
ER
PT J
AU Abbamonte, P
Finkelstein, KD
Collins, MD
Gruner, SM
AF Abbamonte, P
Finkelstein, KD
Collins, MD
Gruner, SM
TI Imaging density disturbances in water with a 41.3-attosecond time
resolution
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID PROBING MOLECULAR-DYNAMICS; X-RAY-SCATTERING; ATTOSECOND; PULSES;
FIELDS; LIGHT; MODEL
AB We show that the momentum flexibility of inelastic x-ray scattering may be exploited to invert its loss function, allowing real time imaging of density disturbances in a medium. We show the disturbance arising from a point source in liquid water, with a resolution of 41.3 attoseconds (4.13x10(-17) s) and 1.27 Angstrom (1.27x10(-8) cm). This result is used to determine the structure of the electron cloud around a photoexcited chromophore in solution, as well as the wake generated in water by a 9 MeV gold ion. We draw an analogy with pump-probe techniques and suggest that energy-loss scattering may be applied more generally to the study of attosecond phenomena.
C1 Cornell Univ, Dept Phys, Ithaca, NY 14853 USA.
Cornell Univ, Cornell High Energy Synchrotron Source, Ithaca, NY 14853 USA.
RP Brookhaven Natl Lab, Bldg 725D, Upton, NY 11973 USA.
RI Gruner, Sol/G-2924-2010
OI Gruner, Sol/0000-0002-1171-4426
NR 29
TC 41
Z9 41
U1 5
U2 15
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 JUN 11
PY 2004
VL 92
IS 23
AR 237401
DI 10.1103/PhysRevLett.92.237401
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 828GN
UT WOS:000221961900053
PM 15245195
ER
PT J
AU Aranson, IS
Sapozhnikov, MV
AF Aranson, IS
Sapozhnikov, MV
TI Theory of pattern formation of metallic microparticles in poorly
conducting liquids
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID FLOW
AB We develop a continuum theory of self-assembly and pattern formation in metallic microparticles immersed in a poorly conducting liquid in a dc electric field. The theory is formulated in terms of conservation laws for the densities of immobile particles (precipitate) and bouncing particles (gas) coupled to the Navier-Stokes equation for the liquid. This theory successfully reproduced the correct topology of the phase diagram and primary patterns observed in the experiment [Sapozhnikov et al., Phys. Rev. Lett. 90, 114301 (2003)]: static crystals, honeycombs, dynamic pulsating rings, and rotating multipetal vortices.
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
Russian Acad Sci, Inst Phys Microstruct, Nizhnii Novgorod 603000, Russia.
RP Aranson, IS (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Aranson, Igor/I-4060-2013
NR 13
TC 15
Z9 15
U1 1
U2 7
PU AMERICAN 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 JUN 11
PY 2004
VL 92
IS 23
AR 234301
DI 10.1103/PhysRevLett.92.234301
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 828GN
UT WOS:000221961900018
PM 15245160
ER
PT J
AU Cubaynes, D
Meyer, M
Grum-Grzhimailo, AN
Bizau, JM
Kennedy, ET
Bozek, J
Martins, M
Canton, S
Rude, B
Berrah, N
Wuilleumier, FJ
AF Cubaynes, D
Meyer, M
Grum-Grzhimailo, AN
Bizau, JM
Kennedy, ET
Bozek, J
Martins, M
Canton, S
Rude, B
Berrah, N
Wuilleumier, FJ
TI Dynamically and quasiforbidden transitions in photoionization of
open-shell atoms: A combined experimental and theoretical study
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID PARTIAL CROSS-SECTIONS; PHOTOELECTRON-SPECTROSCOPY; IONIZATION;
INTENSITIES; ELECTRONS; CHLORINE; STATES; 3S
AB Completely fine-structure-resolved photoelectron spectra produced from sodium atoms selectively excited into the Na-* 2p(6)3p P-2(1/2) and P-2(3/2) states were obtained using a third generation synchrotron source in conjunction with laser pumping and high-resolution spectrometry. The spectra show dramatically different behaviors. The strong variations observed in the regions of the Na+ 2p(5)3p L-1,3(J) photolines and the Na+ 2p(5)4p L-1,3(J) shakeup satellites are explained within a generalized geometrical model, accounting for the intermediate angular momentum coupling in the ionic states.
C1 Univ Paris 11, CNRS, UMR 8624, LIXAM, F-91405 Orsay, France.
Ctr Univ Paris Sud, LURE, F-91898 Orsay, France.
Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119992, Russia.
Dublin City Univ, Sch Phys Sci, NCPST, Dublin 9, Ireland.
Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, Germany.
Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA.
RP Cubaynes, D (reprint author), Univ Paris 11, CNRS, UMR 8624, LIXAM, Batiment 350, F-91405 Orsay, France.
RI Bozek, John/E-4689-2010; Grum-Grzhimailo, Alexei/D-6274-2012; Bozek,
John/E-9260-2010; Canton, Sophie/A-8432-2016;
OI Bozek, John/0000-0001-7486-7238; Martins, Michael/0000-0002-1228-5029
NR 20
TC 28
Z9 28
U1 0
U2 1
PU AMERICAN 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 JUN 11
PY 2004
VL 92
IS 23
AR 233002
DI 10.1103/PhysRevLett.92.233002
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 828GN
UT WOS:000221961900013
PM 15245155
ER
PT J
AU Evans, TE
Moyer, RA
Thomas, PR
Watkins, JG
Osborne, TH
Boedo, JA
Doyle, EJ
Fenstermacher, ME
Finken, KH
Groebner, RJ
Groth, M
Harris, JH
La Haye, RJ
Lasnier, CJ
Masuzaki, S
Ohyabu, N
Pretty, DG
Rhodes, TL
Reimerdes, H
Rudakov, DL
Schaffer, MJ
Wang, G
Zeng, L
AF Evans, TE
Moyer, RA
Thomas, PR
Watkins, JG
Osborne, TH
Boedo, JA
Doyle, EJ
Fenstermacher, ME
Finken, KH
Groebner, RJ
Groth, M
Harris, JH
La Haye, RJ
Lasnier, CJ
Masuzaki, S
Ohyabu, N
Pretty, DG
Rhodes, TL
Reimerdes, H
Rudakov, DL
Schaffer, MJ
Wang, G
Zeng, L
TI Suppression of large edge-localized modes in high-confinement DIII-D
plasmas with a stochastic magnetic boundary
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ASDEX UPGRADE; TOKAMAKS; DENSITY; FIELDS
AB A stochastic magnetic boundary, produced by an applied edge resonant magnetic perturbation, is used to suppress most large edge-localized modes (ELMs) in high confinement (H-mode) plasmas. The resulting H mode displays rapid, small oscillations with a bursty character modulated by a coherent 130 Hz envelope. The H mode transport barrier and core confinement are unaffected by the stochastic boundary, despite a threefold drop in the toroidal rotation. These results demonstrate that stochastic boundaries are compatible with H modes and may be attractive for ELM control in next-step fusion tokamaks.
C1 Gen Atom Co, San Diego, CA 92186 USA.
Univ Calif San Diego, La Jolla, CA 92093 USA.
CEA Cadarache Euratom Assoc, Cadarache, France.
Sandia Natl Labs, Albuquerque, NM 87185 USA.
Lawrence Livermore Natl Lab, Livermore, CA USA.
FZ Julich Euratom Assoc, Julich, Germany.
Australian Natl Univ, Canberra, ACT, Australia.
Natl Inst Fus Sci, Toki, Gifu, Japan.
Univ Calif Los Angeles, Los Angeles, CA USA.
Columbia Univ, New York, NY USA.
RP Gen Atom Co, San Diego, CA 92186 USA.
RI Groth, Mathias/G-2227-2013
NR 14
TC 448
Z9 450
U1 7
U2 37
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 JUN 11
PY 2004
VL 92
IS 23
AR 235003
DI 10.1103/PhysRevLett.92.235003
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 828GN
UT WOS:000221961900022
PM 15245164
ER
PT J
AU Jarzynski, C
Wojcik, DK
AF Jarzynski, C
Wojcik, DK
TI Classical and quantum fluctuation theorems for heat exchange
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID FREE-ENERGY DIFFERENCES; NONEQUILIBRIUM MEASUREMENTS; STOCHASTIC
DYNAMICS; STEADY-STATES; EQUALITY
AB The statistics of heat exchange between two classical or quantum finite systems initially prepared at different temperatures are shown to obey a fluctuation theorem.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
Georgia Inst Technol, Sch Phys, Ctr Nonlinear Sci, Atlanta, GA 30332 USA.
M Nencki Inst Expt Biol, Dept Neurophysiol, PL-02093 Warsaw, Poland.
RP Los Alamos Natl Lab, Div Theoret, T-13,MS B213, Los Alamos, NM 87545 USA.
EM chrisj@lanl.gov; danek@cns.physics.gatech.edu
RI Wojcik, Daniel/C-6334-2008; Jarzynski, Christopher/B-4490-2009
OI Wojcik, Daniel/0000-0003-0812-9872; Jarzynski,
Christopher/0000-0002-3464-2920
NR 19
TC 118
Z9 118
U1 1
U2 20
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 JUN 11
PY 2004
VL 92
IS 23
AR 230602
DI 10.1103/PhysRevLett.92.230602
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 828GN
UT WOS:000221961900005
PM 15245147
ER
PT J
AU Levitas, VI
Henson, BF
Smilowitz, LB
Asay, BW
AF Levitas, VI
Henson, BF
Smilowitz, LB
Asay, BW
TI Solid-solid phase transformation via virtual melting significantly below
the melting temperature
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID STABLE INTERMEDIATE STATE; INELASTIC MATERIAL; STRUCTURAL-CHANGES;
TRANSITION; HMX; OCTAHYDRO-1,3,5,7-TETRANITRO-1,3,5,7-TETRAZOCINE;
KINETICS
AB A new phenomenon is theoretically predicted, namely, that solid-solid transformation with a relatively large transformation strain can occur through virtual melting along the interface at temperatures significantly (more than 100 K) below the melting temperature. The energy of elastic stresses, induced by transformation strain, increases the driving force for melting and reduces the melting temperature. Immediately after melting, the stresses relax and the unstable melt solidifies. Fast solidification in a thin layer leads to nanoscale cracking, which does not affect the thermodynamics and kinetics of solid-solid transformation. Seven theoretical predictions are in quantitative agreement with experiments conducted on the beta-->delta transformation in the HMX energetic crystal.
C1 Texas Tech Univ, Ctr Mechanochem & Synth New Mat, Lubbock, TX 79409 USA.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Levitas, VI (reprint author), Texas Tech Univ, Ctr Mechanochem & Synth New Mat, Lubbock, TX 79409 USA.
NR 16
TC 55
Z9 55
U1 2
U2 14
PU AMERICAN 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 JUN 11
PY 2004
VL 92
IS 23
AR 235702
DI 10.1103/PhysRevLett.92.235702
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 828GN
UT WOS:000221961900028
PM 15245170
ER
PT J
AU Park, T
Chia, EEM
Salamon, MB
Bauer, ED
Vekhter, I
Thompson, JD
Choi, EM
Kim, HJ
Lee, SI
Canfield, PC
AF Park, T
Chia, EEM
Salamon, MB
Bauer, ED
Vekhter, I
Thompson, JD
Choi, EM
Kim, HJ
Lee, SI
Canfield, PC
TI Evidence for the coexistence of an anisotropic superconducting gap and
nonlocal effects in the nonmagnetic superconductor LuNi2B2C
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID FLUX-LINE-LATTICE; SINGLE-CRYSTAL; WAVE SUPERCONDUCTORS;
NEUTRON-SCATTERING; YNI2B2C; VORTEX; TEMPERATURE; TRANSITION;
RESISTIVITY; DEPENDENCE
AB A study of the dependence of the heat capacity C-p(alpha) on the field angle in LuNi2B2C reveals an anomalous disorder effect. For pure samples, C-p(alpha) exhibits a fourfold variation as the field H (alpha=0). A slightly disordered sample, however, develops anomalous secondary minima along <110> for mu(0)H>1 T, leading to an eightfold pattern at 2 K and 1.5 T. The anomalous pattern is discussed in terms of coexisting superconducting gap anisotropy and nonlocal effects.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
Univ Illinois, Dept Phys, Urbana, IL 61801 USA.
Univ Illinois, Mat Res Lab, Urbana, IL 61801 USA.
Pohang Univ Sci & Technol, Natl Creat Res Initiat Ctr Supercond, Pohang 790784, South Korea.
Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea.
Iowa State Univ, Dept Phys & Astron, Ames Lab, Ames, IA 50011 USA.
RP Park, T (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
RI Bauer, Eric/D-7212-2011; Park, Tuson/A-1520-2012; Chia,
Elbert/B-6996-2011; Vekhter, Ilya/M-1780-2013; Canfield,
Paul/H-2698-2014
OI Chia, Elbert/0000-0003-2066-0834;
NR 26
TC 27
Z9 27
U1 0
U2 3
PU AMERICAN 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 JUN 11
PY 2004
VL 92
IS 23
AR 237002
DI 10.1103/PhysRevLett.92.237002
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 828GN
UT WOS:000221961900046
PM 15245188
ER
PT J
AU Pierce, JP
Torija, MA
Gai, Z
Shi, JR
Schulthess, TC
Farnan, GA
Wendelken, JF
Plummer, EW
Shen, J
AF Pierce, JP
Torija, MA
Gai, Z
Shi, JR
Schulthess, TC
Farnan, GA
Wendelken, JF
Plummer, EW
Shen, J
TI Ferromagnetic stability in Fe nanodot assemblies on Cu(111) induced by
indirect coupling through the substrate
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID MAGNETIC-PROPERTIES; ULTRATHIN FILMS; NANOCRYSTALS; SYSTEM; CO
AB We report collective ferromagnetic behavior with high Curie temperatures (T-c) in Fe dot assemblies supported by the Cu(111) surface. Our ability to tune the average size and spacing of the individual dots allows us to conclude that enhanced magnetic anisotropy cannot account for this high-T-c ferromagnetic order. Because our Monte Carlo simulations have ruled out the dipolar interaction as the dominant factor in this system, we attribute the origin of the ferromagnetic order to indirect exchange coupling via the Cu(111) substrate.
C1 Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA.
Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
Peking Univ, Dept Phys, Beijing 100080, Peoples R China.
Peking Univ, State Key Lab Mesoscop Phys, Beijing 100080, Peoples R China.
Oak Ridge Natl Lab, Computat Sci & Engn Div, Oak Ridge, TN 37831 USA.
RP Shen, J (reprint author), Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA.
EM shenj@ornl.gov
RI Shi, Junren/D-5156-2009; Gai, Zheng/B-5327-2012
OI Gai, Zheng/0000-0002-6099-4559
NR 17
TC 48
Z9 50
U1 0
U2 13
PU AMERICAN 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 JUN 11
PY 2004
VL 92
IS 23
AR 237201
DI 10.1103/PhysRevLett.92.237201
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 828GN
UT WOS:000221961900049
PM 15245191
ER
PT J
AU Thomas, KJ
Hill, JP
Grenier, S
Kim, YJ
Abbamonte, P
Venema, L
Rusydi, A
Tomioka, Y
Tokura, Y
McMorrow, DF
Sawatzky, G
van Veenendaal, M
AF Thomas, KJ
Hill, JP
Grenier, S
Kim, YJ
Abbamonte, P
Venema, L
Rusydi, A
Tomioka, Y
Tokura, Y
McMorrow, DF
Sawatzky, G
van Veenendaal, M
TI Soft x-ray resonant diffraction study of magnetic and orbital
correlations in a manganite near half doping
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SCATTERING; CHARGE
AB We have utilized resonant x-ray diffraction at the Mn L-II,L-III edges in order to directly compare magnetic and orbital correlations in Pr0.6Ca0.4MnO3. Comparing the widths of the magnetic and orbital diffraction peaks, we find that the magnetic correlation length exceeds that of the orbital order by nearly a factor of 2. Furthermore, we observe a large (similar to3 eV) spectral weight shift between the magnetic and orbital resonant line shapes, which cannot be explained within the classic Goodenough picture of a charge-ordered ground state. To explain the shift, we calculate the orbital and magnetic resonant diffraction line shapes based on a relaxed charge-ordered model.
C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
Univ Groningen, Ctr Mat Sci, NL-9747 AG Groningen, Netherlands.
Natl Inst Adv Ind Sci & Technol, CERC, Tsukuba, Ibaraki 3058562, Japan.
Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan.
Japan Sci & Technol Corp, ERATO, Spin Superstruct Project, Tsukuba, Ibaraki 3058562, Japan.
UCL, London Ctr Nanotechnol, London WC1E 6BT, England.
UCL, Dept Phys & Astron, London WC1E 6BT, England.
Univ British Columbia, Vancouver, BC V6T 1Z4, Canada.
No Illinois Univ, De Kalb, IL 60115 USA.
Argonne Natl Lab, Argonne, IL 60439 USA.
RP Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RI McMorrow, Desmond/C-2655-2008; Hill, John/F-6549-2011; Kim, Young-June
/G-7196-2011; Tokura, Yoshinori/C-7352-2009; Grenier,
Stephane/N-1986-2014; Rusydi, Andrivo/I-1849-2016
OI McMorrow, Desmond/0000-0002-4947-7788; Kim, Young-June
/0000-0002-1172-8895; Grenier, Stephane/0000-0001-8370-7375;
NR 18
TC 80
Z9 80
U1 1
U2 16
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 JUN 11
PY 2004
VL 92
IS 23
AR 237204
DI 10.1103/PhysRevLett.92.237204
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 828GN
UT WOS:000221961900052
PM 15245194
ER
PT J
AU Wade, MR
Murakami, M
Politzer, PA
AF Wade, MR
Murakami, M
Politzer, PA
TI Validation of neoclassical bootstrap current models in the edge of an
H-mode plasma
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ARBITRARY COLLISIONALITY; ASPECT-RATIO; DIII-D; TOKAMAKS; TRANSPORT;
CONFINEMENT; TRANSITION; REGIME
AB Analysis of the parallel electric field E-parallel to evolution following an L-H transition in the DIII-D tokamak indicates the generation of a large negative pulse near the edge which propagates inward, indicative of the generation of a noninductive edge current. Modeling indicates that the observed E-parallel to evolution is consistent with a narrow current density peak generated in the plasma edge. Very good quantitative agreement is found between the measured E-parallel to evolution and that expected from neoclassical theory predictions of the bootstrap current.
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
Gen Atom Co, San Diego, CA 92186 USA.
RP Wade, MR (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM wade@fusion.gat.com
NR 16
TC 27
Z9 27
U1 0
U2 0
PU AMERICAN 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 JUN 11
PY 2004
VL 92
IS 23
AR 235005
DI 10.1103/PhysRevLett.92.235005
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 828GN
UT WOS:000221961900024
PM 15245166
ER
PT J
AU Fong, DD
Stephenson, GB
Streiffer, SK
Eastman, JA
Auciello, O
Fuoss, PH
Thompson, C
AF Fong, DD
Stephenson, GB
Streiffer, SK
Eastman, JA
Auciello, O
Fuoss, PH
Thompson, C
TI Ferroelectricity in ultrathin perovskite films
SO SCIENCE
LA English
DT Article
ID CHEMICAL-VAPOR-DEPOSITION; X-RAY-SCATTERING; THIN-FILMS; PBTIO3;
POLARIZATION; SURFACE; THICKNESS; PARTICLES; LIMIT
AB Understanding the suppression of ferroelectricity in perovskite thin films is a fundamental issue that has remained unresolved for decades. We report a synchrotron x-ray study of lead titanate as a function of temperature and film thickness for films as thin as a single unit cell. At room temperature, the ferroelectric phase is stable for thicknesses down to 3 unit cells (1.2 nanometers). Our results imply that no thickness limit is imposed on practical devices by an intrinsic ferroelectric size effect.
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
RP Stephenson, GB (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM stephenson@anl.gov
RI Streiffer, Stephen/A-1756-2009; Eastman, Jeffrey/E-4380-2011;
OI Eastman, Jeff/0000-0002-0847-4265; Thompson, Carol/0000-0003-3832-4855
NR 30
TC 658
Z9 668
U1 33
U2 259
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 JUN 11
PY 2004
VL 304
IS 5677
BP 1650
EP 1653
DI 10.1126/science.1098252
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 827WL
UT WOS:000221934300044
PM 15192223
ER
PT J
AU Hull, P
Shepherd, I
Hunt, A
AF Hull, P
Shepherd, I
Hunt, A
TI Modeling light scattering from Diesel soot particles
SO APPLIED OPTICS
LA English
DT Article
ID AEROSOLS
AB The Mie model is widely used to analyze light scattering from particulate aerosols. The Diesel particle scatterometer, for example, determines the size and optical properties of Diesel exhaust particles that are characterized by the measurement of three angle-dependent elements of the Mueller scattering matrix. These elements are then fitted by Mie calculations with a Levenburg-Marquardt optimization program. This approach has achieved good fits for most experimental data. However, in many cases, the predicted complex index of refraction was smaller than that for solid carbon. To understand this result and explain the experimental data, we present an assessment of the Mie model by use of a light-scattering model based on the coupled-dipole approximation. The results indicate that the Mie calculation can be used to determine the largest dimension of irregularly shaped particles at sizes characteristic of Diesel soot and, for particles of known refractive index, tables can be constructed to determine the average porosity of the particles from the predicted index of refraction. (C) 2004 Optical Society of America.
C1 Tennessee State Univ, Nashville, TN 37023 USA.
Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Hull, P (reprint author), Tennessee State Univ, Nashville, TN 37023 USA.
EM ajhunt@lbl.gov
NR 17
TC 18
Z9 19
U1 5
U2 15
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD JUN 10
PY 2004
VL 43
IS 17
BP 3433
EP 3441
DI 10.1364/AO.43.003433
PG 9
WC Optics
SC Optics
GA 827SJ
UT WOS:000221920600009
PM 15219024
ER
PT J
AU Zehavi, I
Weinberg, DH
Zheng, Z
Berlind, AA
Frieman, JA
Scoccimarro, R
Sheth, RK
Blanton, MR
Tegmark, M
Mo, HJJ
Bahcall, NA
Brinkmann, J
Burles, S
Csabai, I
Fukugita, M
Gunn, JE
Lamb, DQ
Loveday, J
Lupton, RH
Meiksin, A
Munn, JA
Nichol, RC
Schlegel, D
Schneider, DP
SubbaRao, M
Szalay, AS
Uomoto, A
York, DG
AF Zehavi, I
Weinberg, DH
Zheng, Z
Berlind, AA
Frieman, JA
Scoccimarro, R
Sheth, RK
Blanton, MR
Tegmark, M
Mo, HJJ
Bahcall, NA
Brinkmann, J
Burles, S
Csabai, I
Fukugita, M
Gunn, JE
Lamb, DQ
Loveday, J
Lupton, RH
Meiksin, A
Munn, JA
Nichol, RC
Schlegel, D
Schneider, DP
SubbaRao, M
Szalay, AS
Uomoto, A
York, DG
CA SDSS Collaboration
TI On departures from a power law in the galaxy correlation function
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE cosmology : observations; cosmology : theory; galaxies : distances and
redshifts; galaxies : fundamental parameters; galaxies : statistics;
large-scale structure of universe
ID DIGITAL SKY SURVEY; DARK-MATTER HALOES; SPECTROSCOPIC TARGET SELECTION;
SPATIAL CORRELATION-FUNCTION; REDSHIFT SURVEY; LUMINOSITY FUNCTION;
HYDRODYNAMIC SIMULATIONS; OCCUPATION DISTRIBUTION; VELOCITY DISPERSION;
ANALYTIC MODEL
AB We measure the projected correlation function w(p)(r(p)) from the Sloan Digital Sky Survey for a flux-limited sample of 118,000 galaxies and a volume-limited subset of 22,000 galaxies with absolute magnitude M(r) < - 21. Both correlation functions show subtle but systematic departures from the best-fit power law, in particular a change in slope at r(p) similar to 1-2 h(-1) Mpc. These departures are stronger for the volume-limited sample, which is restricted to relatively luminous galaxies. We show that the inflection point in w(p)(r(p)) can be naturally explained by contemporary models of galaxy clustering, according to which it marks the transition from a large-scale regime dominated by galaxy pairs in separate dark matter halos to a small-scale regime dominated by galaxy pairs in the same dark matter halo. For example, given the dark halo population predicted by an inflationary cold dark matter scenario, the projected correlation function of the volume-limited sample can be well reproduced by a model in which the mean number of M(r) < - 21 galaxies in a halo of mass M > M(1) = 4.74 x 10(13) h(-1) M(.) is [N](M)=(M/M(1))(0.89), with 75% of the galaxies residing in less massive, single-galaxy halos and simple auxiliary assumptions about the spatial distribution of galaxies within halos and the fluctuations about the mean occupation. This physically motivated model has the same number of free parameters as a power law, and it fits the w(p)(r(p)) data better, with a chi(2)/dof = 0.93, compared to 6.12 (for 10 degrees of freedom, incorporating the covariance of the correlation function errors). Departures from a power-law correlation function encode information about the relation between galaxies and dark matter halos. Higher precision measurements of these departures for multiple classes of galaxies will constrain galaxy bias and provide new tests of the theory of galaxy formation.
C1 Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
NYU, Dept Phys, New York, NY 10003 USA.
Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA.
Univ Penn, Dept Phys, Philadelphia, PA 19104 USA.
Max Planck Inst Astrophys, D-85741 Garching, Germany.
Princeton Univ Observ, Princeton, NJ 08544 USA.
Apache Point Observ, Sunspot, NM 88349 USA.
MIT, Ctr Space Res, Cambridge, MA 02139 USA.
Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
Eotvos Lorand Univ, Dept Phys, H-1518 Budapest, Hungary.
Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan.
Univ Sussex, Sussex Astron Ctr, Brighton BN1 9QJ, E Sussex, England.
Univ Edinburgh, Inst Astron, Edinburgh EH9 3JZ, Midlothian, Scotland.
USN Observ, Flagstaff Stn, Flagstaff, AZ 86002 USA.
Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA.
Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA.
RP Zehavi, I (reprint author), Univ Chicago, Dept Astron & Astrophys, 5640 S Ellis Ave, Chicago, IL 60637 USA.
RI Csabai, Istvan/F-2455-2012; Mo, Houjun/P-7811-2015;
OI Meiksin, Avery/0000-0002-5451-9057; Csabai, Istvan/0000-0001-9232-9898
NR 80
TC 213
Z9 213
U1 1
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JUN 10
PY 2004
VL 608
IS 1
BP 16
EP 24
DI 10.1086/386535
PN 1
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 827EG
UT WOS:000221881200003
ER
PT J
AU Zhang, WQ
Woosley, SE
Heger, A
AF Zhang, WQ
Woosley, SE
Heger, A
TI The propagation and eruption of relativistic jets from the stellar
progenitors of gamma-ray bursts
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE gamma rays : bursts; hydrodynamics; methods : numerical; relativity
ID SUPERNOVA SN 1998BW; MASS-LOSS RATES; CENTRAL ENGINE; HOST GALAXIES;
LIGHT CURVES; BLACK-HOLES; COLLAPSARS; STARS; FLASHES; EXPLOSIONS
AB New two- and three-dimensional calculations are presented of relativistic jet propagation and break out in massive Wolf-Rayet stars. Such jets are thought to be responsible for gamma-ray bursts. As it erupts, the highly relativistic jet core (3degrees to 5degrees; Gamma greater than or similar to 100) is surrounded by a cocoon of less energetic, but still moderately relativistic ejecta (Gamma similar to 15) that expands and becomes visible at larger polar angles (similar to10degrees). These less energetic ejecta may be the origin of X-ray flashes and other high-energy transients, which will be visible to a larger fraction of the sky, albeit to a shorter distance than common gamma-ray bursts. Jet stability is also examined in three-dimensional calculations. If the jet changes angle by more than 3degrees in several seconds, it will dissipate, producing a broad beam with inadequate Lorentz factor to make a common gamma-ray burst. This may be an alternate way to make X-ray flashes.
C1 Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
Los Alamos Natl Lab, Theoret Astrophys Grp, Los Alamos, NM 87545 USA.
Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
RP Zhang, WQ (reprint author), Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
EM zhang@ucolick.org; woosley@ucolick.org; 1@2sn.org
NR 54
TC 156
Z9 158
U1 1
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 JUN 10
PY 2004
VL 608
IS 1
BP 365
EP 377
DI 10.1086/386300
PN 1
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 827EG
UT WOS:000221881200031
ER
PT J
AU Rotthaus, O
Le Roy, S
Tomas, A
Barkigia, KM
Artaud, I
AF Rotthaus, O
Le Roy, S
Tomas, A
Barkigia, KM
Artaud, I
TI Synthesis, structure and catalytic activity of low-spin dicyano
iron(III) complexes of N, N '-bis(quinolyl)malonamide derivatives
SO INORGANICA CHIMICA ACTA
LA English
DT Article
DE N, N'-bis(8-quinolyl)malonamide; iron(III) complex; oxidation; stilbene
ID NONHEME IRON CATALYSTS; CARBOXAMIDO NITROGEN; ALKANE HYDROXYLATION;
CHEMISTRY; LIGAND; COORDINATION; EPOXIDATION; OXIDATION; MODELS; FE
AB Two low-spin Fe(III) dicyano-dicarboxamido, complexes have been prepared from N,N'-bis(8-quinolyl)malonamide derivatives. Crystal structures show that the four nitrogen donors available to complex the metal are arranged in the equatorial plane with the two cyanides trans to each other in the axial positions when the malonyl moiety is disubstituted. In contrast, the unsubstituted malonyl results in only three nitrogens in the equatorial plane with the fourth in an apical position and the two cyanides occupying cis sites, one equatorial and the other axial. NMR analyses show that the solid state structure of both complexes is retained in solution. Both types of configurational complexes catalyze cyclic olefin oxidations with H2O2 but only the cis-dicyano complex catalyzes stilbene oxidation with formation of epoxides, diols and benzaldehyde. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ Paris 05, Chim & Biochim Pharmacol & Toxicol Lab, UMR8601, F-75270 Paris 06, France.
Fac Pharm, Lab Cristallog & RMN Biol, UMR 8015, F-75270 Paris, France.
Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA.
RP Artaud, I (reprint author), Univ Paris 05, Chim & Biochim Pharmacol & Toxicol Lab, UMR8601, 45 Rue Sts Peres, F-75270 Paris 06, France.
EM isabelle.artaud@univ-paris5.fr
NR 31
TC 13
Z9 13
U1 0
U2 0
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 JUN 10
PY 2004
VL 357
IS 8
BP 2211
EP 2217
DI 10.1016/j.ica.2004.01.019
PG 7
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 829MT
UT WOS:000222053400003
ER
PT J
AU Halpern, MB
Helfgott, C
AF Halpern, MB
Helfgott, C
TI Twisted open strings from closed strings: the WZW orientation orbifolds
SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A
LA English
DT Article
DE conformal field theory; orbifolds; string theory
ID CONFORMAL FIELD-THEORY; GENERAL VIRASORO CONSTRUCTION; PION-QUARK MODEL;
PERMUTATION ORBIFOLDS; BOUNDARY OPERATORS; 2 FACES; ALGEBRA; DIMENSIONS;
EXAMPLES; GEOMETRY
AB Including world-sheet orientation-reversing automorphisms (h) over cap (sigma) is an element of H_ in the orbifold program, we construct the operator algebras and twisted KZ systems of the general WZW orientation orbifold A(g)(H_)/H_. We find that the orientation-orbifold sectors corresponding to each (h) over cap (sigma) is an element of H_ are twisted open WZW strings, whose properties are quite distinct from conventional open-string orientifold sectors. As simple illustrations, we also discuss the classical (high-level) limit of our construction and free-boson examples on Abelian g.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Theoret Phys Grp, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Halpern, MB (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM halpern@physics.berkeley.edu; helfgott@socrates.berkeley.edu
NR 60
TC 10
Z9 10
U1 0
U2 0
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0217-751X
J9 INT J MOD PHYS A
JI Int. J. Mod. Phys. A
PD JUN 10
PY 2004
VL 19
IS 14
BP 2233
EP 2292
DI 10.1142/S0217751X04018531
PG 60
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 838QR
UT WOS:000222728600003
ER
PT J
AU Kirchner, B
Hutter, J
Kuo, IFW
Mundy, CJ
AF Kirchner, B
Hutter, J
Kuo, IFW
Mundy, CJ
TI Hydrophobic hydration from Car-Parrinello simulations
SO INTERNATIONAL JOURNAL OF MODERN PHYSICS B
LA English
DT Article
DE hydrophobic hydration; diffusion of hydrophobic particles; simulations;
Cax-Parrinello molecular dynamics; water
ID INITIO MOLECULAR-DYNAMICS; AB-INITIO; LIQUID WATER; DIMETHYL-SULFOXIDE;
AQUEOUS-SOLUTION; DENSITY; EXCHANGE; MODEL; PSEUDOPOTENTIALS;
POLARIZATION
AB In this work we investigate the fast anomalous diffusion of hydrogen molecules in water using Car-Parrinello molecular dynamics simulations. We employ Voronoi polyhedra analysis to distinguish between void diffusion and void hopping. Our results indicate that a combination of both mechanism is sufficient to explain anomalous diffusion. Furthermore, we investigate the geometrical and electronical structure of the first solvation shell.
C1 Univ Bonn, Inst Theoret & Phys Chem, Lehrstuhl Theoret Chem, D-53115 Bonn, Germany.
Univ Zurich, Inst Phys Chem, CH-8057 Zurich, Switzerland.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Univ Bonn, Inst Theoret & Phys Chem, Lehrstuhl Theoret Chem, Wegelerstr 12, D-53115 Bonn, Germany.
EM kirchner@thch.uni-bonn.de
RI Hutter, Juerg/E-9244-2011
NR 58
TC 17
Z9 17
U1 0
U2 3
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0217-9792
EI 1793-6578
J9 INT J MOD PHYS B
JI Int. J. Mod. Phys. B
PD JUN 10
PY 2004
VL 18
IS 14
BP 1951
EP 1962
DI 10.1142/S0217979204007241
PG 12
WC Physics, Applied; Physics, Condensed Matter; Physics, Mathematical
SC Physics
GA 845EX
UT WOS:000223220900001
ER
PT J
AU Le Maitre, OP
Knio, OM
Najm, HN
Ghanem, RG
AF Le Maitre, OP
Knio, OM
Najm, HN
Ghanem, RG
TI Uncertainty propagation using Wiener-Haar expansions
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE wavelets; polynomial chaos; Stochastic process; uncertainty
quantification
ID GENERALIZED POLYNOMIAL CHAOS; STOCHASTIC PROJECTION METHOD;
DIFFERENTIAL-EQUATIONS; MODELING UNCERTAINTY; HERMITE EXPANSION; FLOW
SIMULATIONS; FLUID-FLOW; MEDIA
AB An uncertainty quantification scheme is constructed based on generalized Polynomial Chaos (PC) representations. Two such representations are considered, based on the orthogonal projection of uncertain data and solution variables using either a Haar or a Legendre basis. Governing equations for the unknown coefficients in the resulting representations are derived using a Galerkin procedure and then integrated in order to determine the behavior of the stochastic process. The schemes are applied to a model problem involving a simplified dynamical system and to the classical problem of Rayleigh-Benard instability. For situations involving random parameters close to a critical point, the computational implementations show that the Wiener-Haar (WHa) representation provides more robust predictions that those based on a Wiener-Legendre (WLe) decomposition. However, when the solution depends smoothly on the random data, the WLe scheme exhibits superior convergence. Suggestions regarding future extensions are finally drawn based on these experiences. (C) 2004 Elsevier Inc. All rights reserved.
C1 Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA.
Johns Hopkins Univ, Dept Civil Engn, Baltimore, MD 21218 USA.
Sandia Natl Labs, Combust Res Facil, Livermore, CA 94550 USA.
Univ Evry Val Essonne, Ctr Etud Mecan Ile France, F-91020 Evry, France.
RP Knio, OM (reprint author), Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA.
EM olm@iup.univ-evry.fr; knio@jhu.edu; hnnajm@ca.sandia.gov; ghanem@jhu.edu
RI Knio, Omar/A-3318-2010; Ghanem, Roger/B-8570-2008; Le Maitre,
Olivier/D-8570-2011
OI Ghanem, Roger/0000-0002-1890-920X; Le Maitre,
Olivier/0000-0002-3811-7787
NR 32
TC 178
Z9 178
U1 0
U2 21
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 JUN 10
PY 2004
VL 197
IS 1
BP 28
EP 57
DI 10.1016/j.jcp.2003.11.033
PG 30
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 826MK
UT WOS:000221833000002
ER
PT J
AU Sinha, P
Hobbs, PV
Yokelson, RJ
Blake, DR
Gao, S
Kirchstetter, TW
AF Sinha, P
Hobbs, PV
Yokelson, RJ
Blake, DR
Gao, S
Kirchstetter, TW
TI Emissions from miombo woodland and dambo grassland savanna fires
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
DE trace gases and particles; savanna fires; emissions and emission factors
ID BIOMASS BURNING SEASON; TRANSFORM INFRARED-SPECTROSCOPY; INITIATIVE
SAFARI 2000; SOUTHERN AFRICA; TRACE GASES; OPTICAL-PROPERTIES;
PARTICLES; AEROSOLS; AIRBORNE; SMOKE
AB Airborne measurements of trace gases and particles over and downwind of two prescribed savanna fires in Zambia are described. The measurements include profiles through the smoke plumes of condensation nucleus concentrations and normalized excess mixing ratios of particles and gases, emission factors for 42 trace gases and seven particulate species, and vertical profiles of ambient conditions. The fires were ignited in plots of miombo woodland savanna, the most prevalent savanna type in southern Africa, and dambo grassland savanna, an important enclave of miombo woodland ecosystems. Emission factors for the two fires are combined with measurements of fuel loading, combustion factors, and burned area ( derived from satellite burn scar retrievals) to estimate the emissions of trace gases and particles from woodland and grassland savanna fires in Zambia and southern Africa during the dry season (May-October) of 2000. It is estimated that the emissions of CO2, CO, total hydrocarbons, nitrogen oxides (NOx as NO), sulfur dioxide (SO2), formaldehyde, methyl bromide, total particulate matter, and black carbon from woodland and grassland savanna fires during the dry season of 2000 in southern Africa contributed 12.3%, 12.6%, 5.9%, 10.3%, 7.5%, 24.2%, 2.8%, 17.5%, and 11.1%, respectively, of the average annual emissions from all types of savanna fires worldwide. In 2000 the average annual emissions of methane, ethane, ethene, acetylene, propene, formaldehyde, methanol, and acetic acid from the use of biofuels in Zambia were comparable to or exceeded dry season emissions of these species from woodland and grassland savanna fires in Zambia.
C1 Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA.
Univ Montana, Dept Chem, Missoula, MT 59812 USA.
Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA.
Univ Washington, Dept Chem, Seattle, WA 98195 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA.
RP Univ Washington, Dept Atmospher Sci, Box 351640, Seattle, WA 98195 USA.
EM psinha@atmos.washington.edu; phobbs@atmos.washington.edu;
byok@selway.umt.edu; drblake@uci.edu; sgao@its.caltech.edu;
twkirchstetter@lbl.gov
RI Yokelson, Robert/C-9971-2011
OI Yokelson, Robert/0000-0002-8415-6808
NR 38
TC 19
Z9 20
U1 1
U2 17
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 JUN 10
PY 2004
VL 109
IS D11
AR D11305
DI 10.1029/2004JD004521
PG 13
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 829XU
UT WOS:000222085900001
ER
PT J
AU Gowtham, S
Lau, KC
Deshpande, M
Pandey, R
Gianotto, AK
Groenewold, GS
AF Gowtham, S
Lau, KC
Deshpande, M
Pandey, R
Gianotto, AK
Groenewold, GS
TI Structure, energetics, electronic, and hydration properties of neutral
and anionic Al3O6, Al3O7, and Al3O8 clusters
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID ION MASS-SPECTROMETRY; GAS-PHASE; PHOTOELECTRON-SPECTRA; OXYANIONS;
SOIL; MOLECULES; ENERGIES; STATES; MODELS; SIMS
AB We report the results of a theoretical study of neutral and anionic Al3On (n = 6-8) and an experimental investigation of Al3O6H2- clusters, focusing on their structural and electronic properties. Our results, based on density functional calculations, reveal that sequential oxidation of Al3O5 induces significant structural changes in the cluster configurations in which an O-2 molecule tends to replace an O atom. The neutral Al3On (n = 6-8) clusters are found to be in doublet electronic states, with a planar to three-dimensional close-packed structure being most stable. The triplet state is found to be the optimum electronic state for the ground state of anionic Al3O (n = 6-8). The clusters showed an energetic preference for a twisted-pair rhombic structure, although for n = 6 and 8, a planar hexagonal structure was only 0.16 eV higher in energy. It is also shown that the strength of the oxygen-oxygen bond dominates the preferred fragmentation path for both neutral and anionic clusters. The hydration behavior of an n = 6 cluster Al3O6H2- was examined experimentally using an ion trap-secondary ion mass spectrometer under vacuum conditions, and the gas-phase clusters were shown to add three H2O molecules. Since H2O addition is consistent with the presence of under-coordinated metals in oxide clusters, the experimental result for n = 6 was consistent with the planar hexagonal structure, which contained three under-coordinated Al sites.
C1 Michigan Technol Univ, Dept Phys, Houghton, MI 49931 USA.
Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Michigan Technol Univ, Dept Phys, Houghton, MI 49931 USA.
RI Lau, Kah Chun/A-9348-2013
OI Lau, Kah Chun/0000-0002-4925-3397
NR 32
TC 21
Z9 21
U1 2
U2 9
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 JUN 10
PY 2004
VL 108
IS 23
BP 5081
EP 5090
DI 10.1021/jp038040n
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 826MN
UT WOS:000221833300014
ER
PT J
AU Boyanov, MI
Kemner, KM
Shibata, T
Bunker, BA
AF Boyanov, MI
Kemner, KM
Shibata, T
Bunker, BA
TI Local structure around Cr3+ ions in dilute acetate and perchlorate
aqueous solutions
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID ABSORPTION FINE-STRUCTURE; X-RAY-DIFFRACTION; 2ND HYDRATION SHELL;
MULTIPLE-SCATTERING; STRUCTURE SPECTROSCOPY; 2ND-SPHERE HYDRATION;
MOLECULAR-DYNAMICS; CHLORIDE SOLUTIONS; WATER EXCHANGE; CHROMIUM(III)
AB The hydration structure and aqueous acetate complexation of Cr3+ ions were studied by X-ray absorption fine structure (XAFS) spectroscopy as a function of pH, concentration, acetate:Cr ratio, and age of the solution. In the perchlorate solutions, we found an octahedral hydration shell around the Cr3+ ion at 1.96 Angstrom, confirming previous results through an independent analysis. Distinct Cr-Cr correlation was observed in the Cr acetate solutions, indicating that acetate groups bridge between the metal ions in a polymer structure. Modeling of the data confirmed a cyclic trichromium complex in acetate solutions. Similar spectral features in the Fourier transform were observed at 3.0-3.5 Angstrom for both hydrated and polynuclear Cr. Comparison of the spectral content of such features in the two different cases showed that the origin of the 3.0-3.5 Angstrom structure is multiple scattering within the first O shell alone. Thus, no spectral contribution could be attributed to the outer hydration molecules in data for hydrated Cr3+. We also report on differences in first-shell O backscattering (or possible spectral contributions from H atoms) in the aqueous solutions relative to the crystal oxide, determined by systematic analysis of a Cr2O3 standard.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
RP Boyanov, MI (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM mboyanov@nd.edu
RI ID, MRCAT/G-7586-2011
NR 44
TC 2
Z9 2
U1 1
U2 8
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 JUN 10
PY 2004
VL 108
IS 23
BP 5131
EP 5138
DI 10.1021/jp049444y
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 826MN
UT WOS:000221833300020
ER
PT J
AU Kim, J
Lee, L
Niece, BK
Wang, JX
Gewirth, AA
AF Kim, J
Lee, L
Niece, BK
Wang, JX
Gewirth, AA
TI Formation of ordered multilayers from polyoxometalates and silver on
electrode surfaces
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID QUARTZ-CRYSTAL MICROBALANCE; SCANNING-TUNNELING-MICROSCOPY;
SELF-ASSEMBLED MONOLAYERS; GLASSY-CARBON ELECTRODE;
ELECTROCHEMICAL-BEHAVIOR; GOLD ELECTRODES; SILICOTUNGSTATE ANIONS;
FILMS; ADSORPTION; DEPOSITION
AB We show that multilayers of a common polyoxometalate-silicotungstic anion (STA), alpha-SiW12O404- -are formed on a Ag electrode surface or other electrode surfaces in the presence of Ag+ poised in the cathodic potential region. This effect is not observed on either Au surfaces or C surfaces absent Ag+. Surface X-ray scattering, quartz crystal microbalance, X-ray photoelectron spectroscopy, and scanning tunneling microscopy measurements show that the silicotungstic acid apparently stabilizes the Ag+ cation, which electrostatically assembles with the STA anion or the one-electron reduced species to form ordered multilayers. In contrast to other electrostatically assembled multilayer systems, those formed here exhibit considerable order.
C1 Univ Illinois, Dept Chem, Urbana, IL 61801 USA.
Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA.
Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA.
RP Gewirth, AA (reprint author), Univ Illinois, Dept Chem, Urbana, IL 61801 USA.
EM agewirth@uiuc.edu
NR 49
TC 20
Z9 20
U1 0
U2 9
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD JUN 10
PY 2004
VL 108
IS 23
BP 7927
EP 7933
DI 10.1021/jp0494436
PG 7
WC Chemistry, Physical
SC Chemistry
GA 826MO
UT WOS:000221833400057
ER
PT J
AU Carter, JH
Louck, JD
AF Carter, JH
Louck, JD
TI Magic squares: symmetry and combinatorics
SO MOLECULAR PHYSICS
LA English
DT Article
ID TENSOR OPERATORS; MATRICES
AB Doubly stochastic, magic square, and alternating sign matrices are matrices of order n over the set of real positive numbers R+, the set of nonnegative numbers N, and the set A of integers {-1,0, 1}, respectively, having fixed row and columns sums of 1, all arbitrary positive integer N, and 1. Each can be expressed as a sum over permutation matrices of order 17 with coefficients that belong to R+, to the positive integers P, and to A, respectively. Mathematically, these objects are basic in combinatorics; physically, they arise in several contexts that are briefly reviewed. Little has been developed on their expansions in terms of permutation matrices, and little is known about counting formulas for them, except for alternating sign matrices where a closed formula for arbitrary n was recently obtained through the work of Zeilberger. Expansions of these matrices in terms of permutation matrices can be used to investigate and develop their properties. Such an expansion is called a representation of the magic square. Representations are, however, not unique, and the problem arises of enumerating the number of distinct representations of one and the same magic square. The present investigation addresses this problem in the context of primitive magic squares, which are defined as the class of magic squares of order n having a unique representation in which each permutation matrix occurs exactly once in the expansion, and such that this uniqueness is destroyed by the addition of another permutation matrix not already in the representation, a property called completeness. The set of primitive magic squares has a rich structure that is invariant under the action of a group G that is isomorphic to the dihedral group. The group G is definitive in unveiling the general structure of primitive magic squares by providing a complete labelling scheme that utilizes the (n-4)-fold direct product group of G and a binary tree that specifies a path that shows how the elements in the direct product group are to be selected. Based on this structure, a recurrence relation is derived that generates all inequivalent primitive magic squares. The recurrence relation itself shows a hidden structure of more basic magic squares, called universal kernels, that underlie the structural form of all primitive magic squares. The recurrence relation for primitive magic squares is thus shifted to a recurrence relation for the universal kernels that is simpler in form, which is also derived. These recurrence relations produce one and the same primitive magic square in multiple ways, and the sorting out of the distinct magic squares thus generated remains a problem that is not yet solved.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Louck, JD (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM jimlouck@aol.com
NR 26
TC 0
Z9 0
U1 0
U2 1
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0026-8976
J9 MOL PHYS
JI Mol. Phys.
PD JUN 10
PY 2004
VL 102
IS 11-12
BP 1243
EP 1267
DI 10.1080/00268970410001725774
PG 25
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 861AH
UT WOS:000224388000020
ER
PT J
AU Abazov, VM
Abbott, B
Abdesselam, A
Abolins, M
Abramov, V
Acharya, BS
Adams, DL
Adams, M
Ahmed, SN
Alexeev, GD
Alton, A
Alves, GA
Arnoud, Y
Avila, C
Babintsev, VV
Babukhadia, L
Bacon, TC
Baden, A
Baffioni, S
Baldin, B
Balm, PW
Banerjee, S
Barberis, E
Baringer, P
Barreto, J
Bartlett, JF
Bassler, U
Bauer, D
Bean, A
Beaudette, F
Begel, M
Belyaev, A
Beri, SB
Bernardi, G
Bertram, I
Besson, A
Beuselinck, R
Bezzubov, VA
Bhat, PC
Bhatnagar, V
Bhattacharjee, M
Blazey, G
Blekman, F
Blessing, S
Boehnlein, A
Bojko, NI
Bolton, TA
Borcherding, F
Bos, K
Bose, T
Brandt, A
Briskin, G
Brock, R
Brooijmans, G
Bross, A
Buchholz, D
Buehler, M
Buescher, V
Burtovoi, VS
Butler, JM
Canelli, F
Carvalho, W
Casey, D
Castilla-Valdez, H
Chakraborty, D
Chan, KM
Chekulaev, SV
Cho, DK
Choi, S
Chopra, S
Claes, D
Clark, AR
Connolly, B
Cooper, WE
Coppage, D
Crepe-Renaudin, S
Cummings, MAC
Cutts, D
da Motta, H
Davis, GA
De, K
de Jong, SJ
Demarteau, M
Demina, R
Demine, P
Denisov, D
Denisov, SP
Desai, S
Diehl, HT
Diesburg, M
Doulas, S
Dudko, LV
Duflot, L
Dugad, SR
Duperrin, A
Dyshkant, A
Edmunds, D
Ellison, J
Eltzroth, JT
Elvira, VD
Engelmann, R
Eno, S
Eppley, G
Ermolov, P
Eroshin, OV
Estrada, J
Evans, H
Evdokimov, VN
Ferbel, T
Filthaut, F
Fisk, HE
Fortner, M
Fox, H
Fu, S
Fuess, S
Gallas, E
Galyaev, AN
Gao, M
Gavrilov, V
Genik, RJ
Genser, K
Gerber, CE
Gershtein, Y
Ginther, G
Gomez, B
Goncharov, PI
Gounder, K
Goussiou, A
Grannis, PD
Greenlee, H
Greenwood, ZD
Grinstein, S
Groer, L
Grunendahl, S
Grunewald, MW
Gurzhiev, SN
Gutierrez, G
Gutierrez, P
Hadley, NJ
Haggerty, H
Hagopian, S
Hagopian, V
Hall, RE
Han, C
Hansen, S
Hauptman, JM
Hebert, C
Hedin, D
Heinmiller, JM
Heinson, AP
Heintz, U
Hildreth, MD
Hirosky, R
Hobbs, JD
Hoeneisen, B
Huang, J
Huang, Y
Iashvili, I
Illingworth, R
Ito, AS
Jaffre, M
Jain, S
Jesik, R
Johns, K
Johnson, M
Jonckheere, A
Jostlein, H
Juste, A
Kahl, W
Kahn, S
Kajfasz, E
Kalinin, AM
Karmanov, D
Karmgard, D
Kehoe, R
Kesisoglou, S
Khanov, A
Kharchilava, A
Klima, B
Kohli, JM
Kostritskiy, AV
Kotcher, J
Kothari, B
Kozelov, AV
Kozlovsky, EA
Krane, J
Krishnaswamy, MR
Krivkova, P
Krzywdzinski, S
Kubantsev, M
Kuleshov, S
Kulik, Y
Kunori, S
Kupco, A
Kuznetsov, VE
Landsberg, G
Lee, WM
Leflat, A
Lehner, F
Leonidopoulos, C
Li, J
Li, QZ
Lima, JGR
Lincoln, D
Linn, SL
Linnemann, J
Lipton, R
Lucotte, A
Lueking, L
Lundstedt, C
Luo, C
Maciel, AKA
Madaras, RJ
Malyshev, VL
Manankov, V
Mao, HS
Marshall, T
Martin, MI
Mattingly, SEK
Mayorov, AA
McCarthy, R
McMahon, T
Melanson, HL
Melnitchouk, A
Merkin, A
Merritt, KW
Miao, C
Miettinen, H
Mihalcea, D
Mokhov, N
Mondal, NK
Montgomery, HE
Moore, RW
Mutaf, YD
Nagy, E
Narain, M
Narasimham, VS
Naumann, NA
Neal, HA
Negret, JP
Nelson, S
Nomerotski, A
Nunnemann, T
O'Neil, D
Oguri, V
Oshima, N
Padley, P
Papageorgiou, K
Parashar, N
Partridge, R
Parua, N
Patwa, A
Peters, O
Petroff, P
Piegaia, R
Pope, BG
Prosper, HB
Protopopescu, S
Przybycien, MB
Qian, J
Rajagopalan, S
Rapidis, PA
Reay, NW
Reucroft, S
Ridel, M
Rijssenbeek, M
Rizatdinova, F
Rockwell, T
Royon, C
Rubinov, P
Ruchti, R
Sabirov, BM
Sajot, G
Santoro, A
Sawyer, L
Schamberger, RD
Schellman, H
Schwartzman, A
Shabalina, E
Shivpuri, RK
Shpakov, D
Shupe, M
Sidwell, RA
Simak, V
Sirotenko, V
Slattery, P
Smith, RP
Snow, GR
Snow, J
Snyder, S
Solomon, J
Song, Y
Sorin, V
Sosebee, M
Sotnikova, N
Soustruznik, K
Souza, M
Stanton, NR
Steinbruck, G
Stoker, D
Stolin, V
Stone, A
Stoyanova, DA
Strang, MA
Strauss, M
Strovink, M
Stutte, L
Sznajder, A
Talby, M
Taylor, W
Tentindo-Repond, S
Trippe, TG
Turcot, AS
Tuts, PM
Van Kooten, R
Vaniev, V
Varelas, N
Villeneuve-Seguier, F
Volkov, AA
Vorobiev, AP
Wahl, HD
Wang, ZM
Warchol, J
Watts, G
Wayne, M
Weerts, H
White, A
Whiteson, D
Wijngaarden, DA
Willis, S
Wimpenny, SJ
Womersley, J
Wood, DR
Xu, Q
Yamada, R
Yasuda, T
Yatsunenko, YA
Yip, K
Yu, J
Zanabria, M
Zhang, X
Zhou, B
Zhou, Z
Zielinski, M
Zieminska, D
Zieminski, A
Zutshi, V
Zverev, EG
Zylberstejn, A
AF Abazov, VM
Abbott, B
Abdesselam, A
Abolins, M
Abramov, V
Acharya, BS
Adams, DL
Adams, M
Ahmed, SN
Alexeev, GD
Alton, A
Alves, GA
Arnoud, Y
Avila, C
Babintsev, VV
Babukhadia, L
Bacon, TC
Baden, A
Baffioni, S
Baldin, B
Balm, PW
Banerjee, S
Barberis, E
Baringer, P
Barreto, J
Bartlett, JF
Bassler, U
Bauer, D
Bean, A
Beaudette, F
Begel, M
Belyaev, A
Beri, SB
Bernardi, G
Bertram, I
Besson, A
Beuselinck, R
Bezzubov, VA
Bhat, PC
Bhatnagar, V
Bhattacharjee, M
Blazey, G
Blekman, F
Blessing, S
Boehnlein, A
Bojko, NI
Bolton, TA
Borcherding, F
Bos, K
Bose, T
Brandt, A
Briskin, G
Brock, R
Brooijmans, G
Bross, A
Buchholz, D
Buehler, M
Buescher, V
Burtovoi, VS
Butler, JM
Canelli, F
Carvalho, W
Casey, D
Castilla-Valdez, H
Chakraborty, D
Chan, KM
Chekulaev, SV
Cho, DK
Choi, S
Chopra, S
Claes, D
Clark, AR
Connolly, B
Cooper, WE
Coppage, D
Crepe-Renaudin, S
Cummings, MAC
Cutts, D
da Motta, H
Davis, GA
De, K
de Jong, SJ
Demarteau, M
Demina, R
Demine, P
Denisov, D
Denisov, SP
Desai, S
Diehl, HT
Diesburg, M
Doulas, S
Dudko, LV
Duflot, L
Dugad, SR
Duperrin, A
Dyshkant, A
Edmunds, D
Ellison, J
Eltzroth, JT
Elvira, VD
Engelmann, R
Eno, S
Eppley, G
Ermolov, P
Eroshin, OV
Estrada, J
Evans, H
Evdokimov, VN
Ferbel, T
Filthaut, F
Fisk, HE
Fortner, M
Fox, H
Fu, S
Fuess, S
Gallas, E
Galyaev, AN
Gao, M
Gavrilov, V
Genik, RJ
Genser, K
Gerber, CE
Gershtein, Y
Ginther, G
Gomez, B
Goncharov, PI
Gounder, K
Goussiou, A
Grannis, PD
Greenlee, H
Greenwood, ZD
Grinstein, S
Groer, L
Grunendahl, S
Grunewald, MW
Gurzhiev, SN
Gutierrez, G
Gutierrez, P
Hadley, NJ
Haggerty, H
Hagopian, S
Hagopian, V
Hall, RE
Han, C
Hansen, S
Hauptman, JM
Hebert, C
Hedin, D
Heinmiller, JM
Heinson, AP
Heintz, U
Hildreth, MD
Hirosky, R
Hobbs, JD
Hoeneisen, B
Huang, J
Huang, Y
Iashvili, I
Illingworth, R
Ito, AS
Jaffre, M
Jain, S
Jesik, R
Johns, K
Johnson, M
Jonckheere, A
Jostlein, H
Juste, A
Kahl, W
Kahn, S
Kajfasz, E
Kalinin, AM
Karmanov, D
Karmgard, D
Kehoe, R
Kesisoglou, S
Khanov, A
Kharchilava, A
Klima, B
Kohli, JM
Kostritskiy, AV
Kotcher, J
Kothari, B
Kozelov, AV
Kozlovsky, EA
Krane, J
Krishnaswamy, MR
Krivkova, P
Krzywdzinski, S
Kubantsev, M
Kuleshov, S
Kulik, Y
Kunori, S
Kupco, A
Kuznetsov, VE
Landsberg, G
Lee, WM
Leflat, A
Lehner, F
Leonidopoulos, C
Li, J
Li, QZ
Lima, JGR
Lincoln, D
Linn, SL
Linnemann, J
Lipton, R
Lucotte, A
Lueking, L
Lundstedt, C
Luo, C
Maciel, AKA
Madaras, RJ
Malyshev, VL
Manankov, V
Mao, HS
Marshall, T
Martin, MI
Mattingly, SEK
Mayorov, AA
McCarthy, R
McMahon, T
Melanson, HL
Melnitchouk, A
Merkin, A
Merritt, KW
Miao, C
Miettinen, H
Mihalcea, D
Mokhov, N
Mondal, NK
Montgomery, HE
Moore, RW
Mutaf, YD
Nagy, E
Narain, M
Narasimham, VS
Naumann, NA
Neal, HA
Negret, JP
Nelson, S
Nomerotski, A
Nunnemann, T
O'Neil, D
Oguri, V
Oshima, N
Padley, P
Papageorgiou, K
Parashar, N
Partridge, R
Parua, N
Patwa, A
Peters, O
Petroff, P
Piegaia, R
Pope, BG
Prosper, HB
Protopopescu, S
Przybycien, MB
Qian, J
Rajagopalan, S
Rapidis, PA
Reay, NW
Reucroft, S
Ridel, M
Rijssenbeek, M
Rizatdinova, F
Rockwell, T
Royon, C
Rubinov, P
Ruchti, R
Sabirov, BM
Sajot, G
Santoro, A
Sawyer, L
Schamberger, RD
Schellman, H
Schwartzman, A
Shabalina, E
Shivpuri, RK
Shpakov, D
Shupe, M
Sidwell, RA
Simak, V
Sirotenko, V
Slattery, P
Smith, RP
Snow, GR
Snow, J
Snyder, S
Solomon, J
Song, Y
Sorin, V
Sosebee, M
Sotnikova, N
Soustruznik, K
Souza, M
Stanton, NR
Steinbruck, G
Stoker, D
Stolin, V
Stone, A
Stoyanova, DA
Strang, MA
Strauss, M
Strovink, M
Stutte, L
Sznajder, A
Talby, M
Taylor, W
Tentindo-Repond, S
Trippe, TG
Turcot, AS
Tuts, PM
Van Kooten, R
Vaniev, V
Varelas, N
Villeneuve-Seguier, F
Volkov, AA
Vorobiev, AP
Wahl, HD
Wang, ZM
Warchol, J
Watts, G
Wayne, M
Weerts, H
White, A
Whiteson, D
Wijngaarden, DA
Willis, S
Wimpenny, SJ
Womersley, J
Wood, DR
Xu, Q
Yamada, R
Yasuda, T
Yatsunenko, YA
Yip, K
Yu, J
Zanabria, M
Zhang, X
Zhou, B
Zhou, Z
Zielinski, M
Zieminska, D
Zieminski, A
Zutshi, V
Zverev, EG
Zylberstejn, A
CA DO Collaboration
TI A precision measurement of the mass of the top quark
SO NATURE
LA English
DT Article
ID PAIR PRODUCTION; DETECTOR; EVENT
AB The standard model of particle physics contains parameters such as particle masses - whose origins are still unknown and which cannot be predicted, but whose values are constrained through their interactions. In particular, the masses of the top quark (M-t) and W boson (M-W)(1) constrain the mass of the long-hypothesized, but thus far not observed, Higgs boson. A precise measurement of Mt can therefore indicate where to look for the Higgs, and indeed whether the hypothesis of a standard model Higgs is consistent with experimental data. As top quarks are produced in pairs and decay in only about 10(-24) s into various final states, reconstructing their masses from their decay products is very challenging. Here we report a technique that extracts more information from each top-quark event and yields a greatly improved precision (of +/- 5.3 GeV/c(2)) when compared to previous measurements(2). When our new result is combined with our published measurement in a complementary decay mode(3) and with the only other measurements available(2), the new world average for M-t becomes(4) 178.0 +/- 4.3 GeV/c(2). As a result, the most likely Higgs mass increases from the experimentally excluded(5) value(6) of 96 to 117GeV/c(2), which is beyond current experimental sensitivity. The upper limit on the Higgs mass at the 95% confidence level is raised from 219 to 251 GeV/c(2).
C1 Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA.
Joint Inst Nucl Res, Dubna 141980, Russia.
Univ Oklahoma, Dept Phys & Astron, Norman, OK 73019 USA.
Lab Accelerateur Lineaire, CNRS, IN2P3, F-91898 Orsay, France.
Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA.
Inst High Energy Phys, Protvino 142284, Russia.
Tata Inst Fundamental Res, Sch Nat Sci, Bombay 400005, Maharashtra, India.
Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
Univ Illinois, Dept Phys, Chicago, IL 60607 USA.
Univ Nijmegen, NIKHEF, NL-6500 GL Nijmegen, Netherlands.
Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
Ctr Brasileiro Pesquisas Fis, LAFEX, BR-22290180 Rio De Janeiro, Brazil.
Univ Grenoble 1, Lab Phys Subatom & Cosmol, CNRS, IN2P3, F-38026 Grenoble, France.
Univ Los Andes, Dept Fis, HEP Grp, Bogota, Colombia.
SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2BW, England.
Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
Univ Mediterranee, CPPM, CNRS, IN2P3, F-13288 Marseille, France.
Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
FOM, Inst NIKHEF, NL-1009 DB Amsterdam, Netherlands.
Univ Amsterdam, NIKHEF, NL-1009 DB Amsterdam, Netherlands.
Northeastern Univ, Dept Phys, Boston, MA 02115 USA.
Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA.
Univ Paris 06, LPNHE, CNRS, IN2P3, F-75252 Paris, France.
Univ Paris 07, LPNHE, CNRS, IN2P3, F-75252 Paris, France.
Indiana Univ, Dept Phys, Bloomington, IN 47405 USA.
Florida State Univ, Dept Phys 4350, Tallahassee, FL 32306 USA.
Panjab Univ, Dept Phys, Chandigarh 160014, India.
Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England.
No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
Kansas State Univ, Dept Phys, Manhattan, KS 66506 USA.
Columbia Univ, Dept Phys, New York, NY 10027 USA.
Univ Texas, Dept Phys, Arlington, TX 76019 USA.
Brown Univ, Dept Phys, Providence, RI 02912 USA.
Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
Univ Freiburg, Inst Phys, D-79104 Freiburg, Germany.
Boston Univ, Dept Phys, Boston, MA 02215 USA.
Univ Estado Rio de Janeiro, Inst Fis, BR-20559900 Rio De Janeiro, Brazil.
CINVESTAV, Dept Fis, Mexico City 07000, DF, Mexico.
Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA.
Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
CEA Saclay, Serv Phys Particules, DAPNIA, F-91191 Gif Sur Yvette, France.
Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, Russia.
Rice Univ, Bonner Nucl Lab, Houston, TX 77005 USA.
Inst Theoret & Expt Phys, Moscow 117259, Russia.
Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
Louisiana Tech Univ, Dept Phys, Ruston, LA 71272 USA.
Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, RA-1428 Buenos Aires, DF, Argentina.
Natl Univ Ireland Univ Coll Dublin, Fac Sci, Dept Expt Phys, Dublin 4, Ireland.
Calif State Univ Fresno, Dept Phys, Fresno, CA 93740 USA.
Iowa State Univ, Dept Phys, High Energy Phys Grp, Ames, IA 50011 USA.
Univ Virginia, Dept Phys, Charlottesville, VA 22901 USA.
Univ San Francisco Quito, Quito, Ecuador.
Univ Arizona, Dept Phys, Tucson, AZ 85721 USA.
Charles Univ, Fac Math & Phys, Ctr Particle Phys, Inst Nucl & Particle Phys, CZ-18000 Prague 8, Czech Republic.
Acad Sci Czech Republ, Inst Phys, Ctr Particle Phys, CZ-18221 Prague 8, Czech Republic.
Inst High Energy Phys, Beijing 100039, Peoples R China.
Langston Univ, Dept Math, Langston, OK 73050 USA.
Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India.
Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
Univ Washington, Dept Phys, Seattle, WA 98195 USA.
RP Estrada, J (reprint author), Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA.
EM estrada@fnal.gov
RI Sznajder, Andre/L-1621-2016; Canelli, Florencia/O-9693-2016; Juste,
Aurelio/I-2531-2015; Alves, Gilvan/C-4007-2013; Santoro,
Alberto/E-7932-2014; Belyaev, Alexander/F-6637-2015; Nomerotski,
Andrei/A-5169-2010; Shivpuri, R K/A-5848-2010; Gutierrez,
Phillip/C-1161-2011; Leflat, Alexander/D-7284-2012; Dudko,
Lev/D-7127-2012; Yip, Kin/D-6860-2013; Kuleshov, Sergey/D-9940-2013; De,
Kaushik/N-1953-2013; Oguri, Vitor/B-5403-2013; Chekulaev,
Sergey/O-1145-2015; Grinstein, Sebastian/N-3988-2014
OI Sznajder, Andre/0000-0001-6998-1108; Canelli,
Florencia/0000-0001-6361-2117; Sawyer, Lee/0000-0001-8295-0605; Hedin,
David/0000-0001-9984-215X; Wahl, Horst/0000-0002-1345-0401; Juste,
Aurelio/0000-0002-1558-3291; de Jong, Sijbrand/0000-0002-3120-3367;
Landsberg, Greg/0000-0002-4184-9380; Blessing,
Susan/0000-0002-4455-7279; Gershtein, Yuri/0000-0002-4871-5449;
Duperrin, Arnaud/0000-0002-5789-9825; Hoeneisen,
Bruce/0000-0002-6059-4256; Leonidopoulos, Christos/0000-0002-7241-2114;
Belyaev, Alexander/0000-0002-1733-4408; Dudko, Lev/0000-0002-4462-3192;
Yip, Kin/0000-0002-8576-4311; Kuleshov, Sergey/0000-0002-3065-326X; De,
Kaushik/0000-0002-5647-4489; Melnychuk, Oleksandr/0000-0002-2089-8685;
Bassler, Ursula/0000-0002-9041-3057; Filthaut,
Frank/0000-0003-3338-2247; Naumann, Axel/0000-0002-4725-0766; Blekman,
Freya/0000-0002-7366-7098; Blazey, Gerald/0000-0002-7435-5758; Evans,
Harold/0000-0003-2183-3127; Beuselinck, Raymond/0000-0003-2613-7446;
Heinson, Ann/0000-0003-4209-6146; grannis, paul/0000-0003-4692-2142;
Qian, Jianming/0000-0003-4813-8167; Strovink, Mark/0000-0001-7020-7769;
Madaras, Ronald/0000-0001-7399-2993; Begel, Michael/0000-0002-1634-4399;
Grinstein, Sebastian/0000-0002-6460-8694
NR 26
TC 190
Z9 191
U1 0
U2 16
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
J9 NATURE
JI Nature
PD JUN 10
PY 2004
VL 429
IS 6992
BP 638
EP 642
DI 10.1038/nature02589
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 827PJ
UT WOS:000221912600034
PM 15190311
ER
PT J
AU Achermann, M
Petruska, MA
Kos, S
Smith, DL
Koleske, DD
Klimov, VI
AF Achermann, M
Petruska, MA
Kos, S
Smith, DL
Koleske, DD
Klimov, VI
TI Energy-transfer pumping of semiconductor nanocrystals using an epitaxial
quantum well
SO NATURE
LA English
DT Article
ID LIGHT-EMITTING-DIODES; STIMULATED-EMISSION; DOTS; RELAXATION; POLYMER
AB As a result of quantum-confinement effects, the emission colour of semiconductor nanocrystals can be modified dramatically by simply changing their size(1,2). Such spectral tunability, together with large photoluminescence quantum yields and high photostability, make nanocrystals attractive for use in a variety of light-emitting technologies - for example, displays, fluorescence tagging(3), solid-state lighting and lasers(4). An important limitation for such applications, however, is the difficulty of achieving electrical pumping, largely due to the presence of an insulating organic capping layer on the nanocrystals. Here, we describe an approach for indirect injection of electron - hole pairs ( the electron - hole radiative recombination gives rise to light emission) into nanocrystals by non-contact, non-radiative energy transfer from a proximal quantum well that can in principle be pumped either electrically or optically. Our theoretical and experimental results indicate that this transfer is fast enough to compete with electron - hole recombination in the quantum well, and results in greater than 50 per cent energy-transfer efficiencies in the tested structures. Furthermore, the measured energy-transfer rates are sufficiently large to provide pumping in the stimulated emission regime, indicating the feasibility of nanocrystal-based optical amplifiers and lasers based on this approach.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Klimov, VI (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM achermann@lanl.gov; klimov@lanl.gov
RI Achermann, Marc/A-1849-2011; Kos, Simon/G-3289-2016
OI Achermann, Marc/0000-0002-3939-9309; Kos, Simon/0000-0003-1657-9793
NR 18
TC 425
Z9 430
U1 10
U2 108
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
J9 NATURE
JI Nature
PD JUN 10
PY 2004
VL 429
IS 6992
BP 642
EP 646
DI 10.1038/nature02571
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 827PJ
UT WOS:000221912600035
PM 15190347
ER
PT J
AU Jones, JE
Cheshire, MC
Casadonte, DJ
Phifer, CC
AF Jones, JE
Cheshire, MC
Casadonte, DJ
Phifer, CC
TI Facile sonochemical synthesis of graphite intercalation compounds
SO ORGANIC LETTERS
LA English
DT Article
ID HIGH-INTENSITY ULTRASOUND; POTASSIUM-GRAPHITE; COMPLEXES; POLYSILYNES;
REDUCTION; EFFICIENT; METALS
AB Graphite intercalation compounds (GICs) are useful as powerful reducing agents in organic chemistry and are typically prepared by anaerobic solid-state reactions at high temperatures for 1-8 h. We have been able to prepare KC8 in situ in toluene using ultrasound in less than 5 min. This allows for a convenient approach to reductive chemical syntheses involving GICs.
C1 Texas Tech Univ, Dept Chem & Biochem, Lubbock, TX 79409 USA.
Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Jones, JE (reprint author), Texas Tech Univ, Dept Chem & Biochem, Lubbock, TX 79409 USA.
EM dominick.casadonte@ttu.edu
NR 21
TC 11
Z9 12
U1 2
U2 12
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 JUN 10
PY 2004
VL 6
IS 12
BP 1915
EP 1917
DI 10.1021/ol0496632
PG 3
WC Chemistry, Organic
SC Chemistry
GA 826ZP
UT WOS:000221868300009
PM 15176782
ER
PT J
AU Henderson, MG
AF Henderson, MG
TI The May 2-3, 1986 CDAW-9C interval: A sawtooth event
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
AB We re-examine the CDAW-9C interval and show that it was a sawtooth event - and therefore that sawtooth events have been studied as substorms in the past. We also show that tail-like stretching of the magnetic field can occur well inside of geosynchronous orbit and we present evidence that substorm-associated tail reconnection can occur inside of -11 R-E. We conclude that a major difference between sawtooth and non-sawtooth substorms is that the sawtooth variety appear to represent a 'mode' of behavior in which substorm activity is brought anomalously close to the Earth for extended periods of time.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Henderson, MG (reprint author), Los Alamos Natl Lab, ISR-1,Mail Stop D466, Los Alamos, NM 87545 USA.
EM mghenderson@landl.gov
RI Henderson, Michael/A-3948-2011
OI Henderson, Michael/0000-0003-4975-9029
NR 7
TC 45
Z9 45
U1 1
U2 3
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 JUN 9
PY 2004
VL 31
IS 11
AR L11804
DI 10.1029/2004GL019941
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 829XJ
UT WOS:000222084600005
ER
PT J
AU Lawrence, DJ
Maurice, S
Feldman, WC
AF Lawrence, DJ
Maurice, S
Feldman, WC
TI Gamma-ray measurements from Lunar Prospector: Time series data reduction
for the gamma-ray spectrometer
SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
LA English
DT Article
DE gamma ray; Lunar Prospector; Moon
ID NEUTRON SPECTROMETERS; THORIUM ABUNDANCES; WATER ICE; SURFACE; MOON
AB The data reduction process for the Lunar Prospector Gamma-Ray Spectrometer (LP-GRS) time series data is described. This process takes raw data that are received directly from the spacecraft and converts them to time series gamma-ray spectra that are used to derive elemental maps. These processed LP-GRS time series data are used as the fundamental data set for deriving composition measurements of the lunar surface using either energy window techniques or the full modeling of the neutron and gamma-ray transport processes. The analyses that use these gamma-ray spectra to derive elemental abundances are beyond the scope of this manuscript but are described elsewhere in multiple publications. The processing described here to create the time series gamma-ray spectra includes selections to eliminate bad data as well as make corrections due to time variations in the cosmic ray flux, LP-GRS gain, LP-GRS orientation, and altitude above the lunar surface. Descriptions are also given of data uncertainties and how the LP-GRS data are mapped onto the lunar surface.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
Observ Midi Pyrenees, Ctr Etud Spatiale Rayonnements, F-31400 Toulouse, France.
RP Lawrence, DJ (reprint author), Los Alamos Natl Lab, MS D-466, Los Alamos, NM 87545 USA.
EM djlawrence@lanl.gov
RI Lawrence, David/E-7463-2015
OI Lawrence, David/0000-0002-7696-6667
NR 28
TC 31
Z9 31
U1 0
U2 3
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9097
EI 2169-9100
J9 J GEOPHYS RES-PLANET
JI J. Geophys. Res.-Planets
PD JUN 9
PY 2004
VL 109
IS E7
AR E07S05
DI 10.1029/2003JE002206
PG 23
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 829YD
UT WOS:000222087100001
ER
PT J
AU Greenleaf, WB
Jefferson, J
Perry, P
Hearn, AS
Cabelli, DE
Lepock, JR
Stroupe, ME
Tainer, JA
Nick, HS
Silverman, DN
AF Greenleaf, WB
Jefferson, J
Perry, P
Hearn, AS
Cabelli, DE
Lepock, JR
Stroupe, ME
Tainer, JA
Nick, HS
Silverman, DN
TI Role of hydrogen bonding in the active site of human manganese
superoxide dismutase
SO BIOCHEMISTRY
LA English
DT Article
ID PRODUCT INHIBITION; AQUEOUS-SOLUTIONS; ESCHERICHIA-COLI;
PULSE-RADIOLYSIS; SYSTEM; MUTANT; THERMOSTABILITY; CATALYSIS; MUTATIONS;
PATHWAY
AB The side chain of Gln143, a conserved residue in manganese superoxide dismutase (MnSOD), forms a hydrogen bond with the manganese-bound solvent and is critical in maintaining catalytic activity. The side chains of Tyr34 and Trp123 form hydrogen bonds with the carboxamide of Gln143. We have replaced Tyr34 and Trp123 with Phe in single and double mutants of human MnSOD and measured their catalytic activity by stopped-flow spectrophotometry and pulse radiolysis. The replacements of these side chains inhibited steps in the catalysis as much as 50-fold; in addition, they altered the gating between catalysis and formation of a peroxide complex to yield a more product-inhibited enzyme. The replacement of both Tyr34 and Trp123 in a double mutant showed that these two residues interact cooperatively in maintaining catalytic activity. The crystal structure of Y34F/W123F human MnSOD at 1.95 Angstrom resolution suggests that this effect is not related to a conformational change in the side chain of Gin 143, which does not change orientation in Y34F/W123F, but rather to more subtle electronic effects due to the loss of hydrogen bonding to the carboxamide side chain of Gln143. Wild-type MnSOD containing Trp123 and Tyr34 has approximately the same thermal stability compared with mutants containing Phe at these positions, suggesting the hydrogen bonds formed by these residues have functional rather than structural roles.
C1 Univ Florida, Ctr Hlth, Dept Pharmacol, Gainesville, FL 32610 USA.
Univ Florida, Dept Neurosci, Gainesville, FL 32610 USA.
Univ Toronto, Dept Med Biophys, Toronto, ON M5G 2M9, Canada.
Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
Scripps Res Inst, Dept Mol Biol, La Jolla, CA 92037 USA.
RP Silverman, DN (reprint author), Univ Florida, Ctr Hlth, Dept Pharmacol, Box 100267, Gainesville, FL 32610 USA.
EM silvermn@college.med.ufl.edu
FU NIGMS NIH HHS [GM48495, GM54903]
NR 34
TC 28
Z9 28
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 JUN 8
PY 2004
VL 43
IS 22
BP 7038
EP 7045
DI 10.1021/bi049888k
PG 8
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 826CV
UT WOS:000221807500022
PM 15170341
ER
PT J
AU Pollard, DA
Bergman, CM
Stoye, J
Celniker, SE
Eisen, MB
AF Pollard, DA
Bergman, CM
Stoye, J
Celniker, SE
Eisen, MB
TI Benchmarking tools for the alignment of functional noncoding DNA (vol 5,
pg 6, 2004)
SO BMC BIOINFORMATICS
LA English
DT Correction
C1 Univ Calif Berkeley, Biophys Grad Grp, Berkeley, CA 94720 USA.
Lawrence Orlando Berkeley Natl Lab, Div Life Sci, Dept Genome Sci, Berkeley, CA 94720 USA.
Lawrence Berkeley Natl Lab, Berkeley Drosophila Genome Project, Berkeley, CA 94720 USA.
Univ Bielefeld, Tech Fak, D-33594 Bielefeld, Germany.
Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
RP Pollard, DA (reprint author), Univ Calif Berkeley, Biophys Grad Grp, Berkeley, CA 94720 USA.
EM dpollard@socrates.berkeley.edu; cbergman@gen.cam.ac.uk;
stoye@techfak.uni-bielefeld.de; celniker@fruitfly.org; mbeisen@lbl.gov
RI Stoye, Jens/A-2709-2012
OI Stoye, Jens/0000-0002-4656-7155
NR 3
TC 4
Z9 4
U1 0
U2 0
PU BIOMED CENTRAL LTD
PI LONDON
PA MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T 4LB, ENGLAND
SN 1471-2105
J9 BMC BIOINFORMATICS
JI BMC Bioinformatics
PD JUN 8
PY 2004
VL 5
AR 73
DI 10.1186/1471-2105-5-73
PG 6
WC Biochemical Research Methods; Biotechnology & Applied Microbiology;
Mathematical & Computational Biology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
Mathematical & Computational Biology
GA 835SK
UT WOS:000222505600001
PM 15186509
ER
PT J
AU Knickelbein, MB
AF Knickelbein, MB
TI Electric dipole polarizabilities of copper clusters
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID COLLISION-INDUCED DISSOCIATION; SMALL METALLIC PARTICLES; SHELL
STRUCTURE; PHOTOELECTRON-SPECTROSCOPY; IONIZATION-POTENTIALS; GEOMETRIC
STRUCTURE; ALKALI CLUSTERS; THIN-FILMS; FRAGMENTATION; STABILITY
AB The static electric dipole polarizabilities of Cu-9-Cu-61 have been measured via a molecular beam deflection method. The clusters display per-atom polarizabilities that decrease monotonically with size, from similar to16 Angstrom(3) per atom Cu9-10 to similar to5 Angstrom(3) (Cu45-61). Absent are any discernible discontinuities or odd-even alternations due to electronic shell filling or electron pairing effects. For the smallest clusters, the experimental polarizabilities are similar to3 times larger than those predicted classically for conducting ellipsoids, and approach the classical values only for clusters containing more than similar to45 atoms. (C) 2004 American Institute of Physics.
C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
RP Knickelbein, MB (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM knickelbein@anl.gov
NR 52
TC 35
Z9 35
U1 0
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUN 8
PY 2004
VL 120
IS 22
BP 10450
EP 10454
DI 10.1063/1.1712791
PG 5
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 822KM
UT WOS:000221538200013
PM 15268073
ER
PT J
AU Zhao, CY
Balasubramanian, K
AF Zhao, CY
Balasubramanian, K
TI Spectroscopic properties of novel aromatic metal clusters: NaM4
(M=Al,Ga,In) and their cations and anions
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID COMBINED PHOTOELECTRON-SPECTROSCOPY; RELATIVISTIC EFFECTIVE POTENTIALS;
SPIN-ORBIT OPERATORS; AB-INITIO; CONTAINING MOLECULES; PLANAR CARBON;
SI; GE
AB The ground- and several excited states of metal aromatic clusters, namely NaM4 and NaM4+/- (M=Al,Ga,In) clusters have been investigated by employing complete active-space self-consistent-field followed by multireference singles and doubles configuration interaction computations that included up to 10 million configurations and other methods. The ground states NaM4- of aromatic anions are found to be symmetric C-4v ((1)A(1)) electronic states with ideal square pyramid geometries. While the ground state of NaIn4 is also predicted to be a symmetric C-4v ((2)A(1)) square pyramid, the ground state of the NaAl4 cluster is found to have a C-2v ((2)A(1)) pyramid with a rhombus base, and the ground state of NaGa4 possesses a C-2v ((2)A(1)) pyramid with a rectangle base. In general, these structures exhibit two competing geometries, viz., an ideal C-4v structure and a distorted rhomboidal or rectangular pyramid structure (C-2v). All of the ground states of the NaM4+ (M=Al,Ga,In) cations are computed to be C-2v ((3)A(2)) pyramids with rhombus bases. The equilibrium geometries, vibrational frequencies, dissociation energies, adiabatic ionization potentials, adiabatic electron affinities for the electronic states of NaM4 (M=Al,Ga,In), and their ions are computed and compared with experimental results and other theoretical calculations. On the basis of our computed excited states energy separations, we have tentatively suggested assignments to the observed X and A states in the anion photoelectron spectra of Al4Na- reported by Li [X. Li, A. E. Kuznetov, H. F. Zheng, A. I. Boldyrev, and L. S. Wang, Science 291, 859 (2001)]. The X state can be assigned to a C-2v ((2)A(1)) rhomboidal pyramid. The A state observed in the anion spectrum is assigned to the first excited state (B-2(1)) of the neutral NaAl4 with the C-4v symmetry. The assignments of the excited states are consistent with the experimental excitation energies and the previous Green's function-based methods for the vertical transition energy separations between the X and A bands. (C) 2004 American Institute of Physics.
C1 Univ Calif Davis, Ctr Image Proc & Integrated Comp, Livermore, CA 94550 USA.
Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Glenn T Seaborg Ctr, Berkeley, CA 94720 USA.
RP Zhao, CY (reprint author), Univ Calif Davis, Ctr Image Proc & Integrated Comp, Livermore, CA 94550 USA.
EM kbala@ucdavis.edu
NR 31
TC 18
Z9 19
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUN 8
PY 2004
VL 120
IS 22
BP 10501
EP 10512
DI 10.1063/1.1738112
PG 12
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 822KM
UT WOS:000221538200017
PM 15268077
ER
PT J
AU Draeger, EW
Grossman, JC
Williamson, AJ
Galli, G
AF Draeger, EW
Grossman, JC
Williamson, AJ
Galli, G
TI Optical properties of passivated silicon nanoclusters: The role of
synthesis
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID SI QUANTUM DOTS; ELECTRONIC-STRUCTURE; POROUS SILICON; NANOCRYSTALS;
CLUSTERS; SPECTRA; NANOPARTICLES; LUMINESCENCE; TRANSITIONS
AB The effect of preparation conditions on the structural and optical properties of silicon nanoparticles is investigated. Nanoscale reconstructions, unique to curved nanosurfaces, are presented for silicon nanocrystals and shown to have lower energy and larger optical gaps than bulk-derived structures. We find that high-temperature synthesis processes can produce metastable noncrystalline nanostructures with different core structures than bulk-derived crystalline clusters. The type of core structure that forms from a given synthesis process may depend on the passivation mechanism and time scale. The effect of oxygen on the optical of different types of silicon structures is calculated. In contrast to the behavior of bulklike nanostructures, for noncrystalline and reconstructed crystalline structures surface oxygen atoms do not decrease the gap. In some cases, the presence of oxygen atoms at the nanocluster surface can significantly increase the optical absorption gap, due to decreased angular distortion of the silicon bonds. The relationship between strain and the optical gap in silicon nanoclusters is discussed. (C) 2004 American Institute of Physics.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Draeger, EW (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
NR 32
TC 33
Z9 33
U1 1
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 JUN 8
PY 2004
VL 120
IS 22
BP 10807
EP 10814
DI 10.1063/1.1738633
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 822KM
UT WOS:000221538200048
PM 15268108
ER
PT J
AU Meriaux, AS
Ryerson, FJ
Tapponnier, P
Van der Woerd, J
Finkel, RC
Xu, XW
Xu, ZQ
Caffee, MW
AF Meriaux, AS
Ryerson, FJ
Tapponnier, P
Van der Woerd, J
Finkel, RC
Xu, XW
Xu, ZQ
Caffee, MW
TI Rapid slip along the central Altyn Tagh Fault: Morphochronologic
evidence from Cherchen He and Sulamu Tagh
SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
LA English
DT Article
DE slip rates; cosmogenic dating; Indo-Asian collision
ID INDIA-ASIA COLLISION; CALIFORNIA SHEAR ZONE; IN-SITU BE-10; TIBETAN
PLATEAU; ACTIVE DEFORMATION; NORTHWEST CHINA; KUNLUN FAULT; COSMOGENIC
NUCLIDES; FLUVIAL TERRACES; PRODUCTION-RATES
AB To better constrain the ongoing rates of deformation in northern Tibet, the ages of fluvial and glacial geomorphic markers left-laterally displaced by the Altyn Tagh Fault have been determined by radiocarbon and Be-10-(26) Al cosmic ray exposure dating. Two sites were investigated: Cherchen He and Sulamu Tagh, both near Tura (similar to37.6degreesN, 86.6degreesE). The sites are geomorphologically distinct with Cherchen He dominated by fluvial processes and the Sulamu Tagh by glacial action. Nine offsets ranging from 166 to 3660 m with ages between 6 and 113 ka yield an average slip rate of 26.9 +/- 6.9 mm/yr. Landscape evolution appears to have been modulated by climate change and is temporally consistent with the delta(18)O record from the Guliya ice cap in the West Kunlun; the features of interest were all formed by glacial and fluvial processes subsequent to marine isotope stage 5e, with the youngest features having formed during the early Holocene Optimum. This "near-field,'' morphochronological slip rate is averaged over many earthquake cycles and is hence little affected by interseismic strain. It is kinematically consistent with other, somewhat lower, geomorphic slip rate measurements to the east. The average rate, and lower bounds obtained from alternate interpretational models, 18.4 mm/yr, cannot be reconciled with the most rece geodetic measurements (similar to7 mm/yr), suggesting that interseismic strain and interactions with adjacent faults may lead to disparate geologic and geodetic rate estimates. This late Pleistocene-Holocene, morphochronologic rate would imply that, at this longitude, the Altyn Tagh Fault, on the north edge of Tibet, might absorb almost as much of India's convergence relative to Siberia as the Himalayan Main Frontal Thrust does on the southern edge of the plateau.
C1 Lawrence Livermore Natl Lab, Div Earth Sci, Livermore, CA 94550 USA.
Inst Phys Globe, CNRS, UMR 7578, Lab Tecton Mecan Lithosphere, F-75252 Paris, France.
Seismol Bureau, Beijing 100036, Peoples R China.
Minist Lab & Resources, Inst Geol, Beijing 100037, Peoples R China.
RP Meriaux, AS (reprint author), Lawrence Livermore Natl Lab, Div Earth Sci, L-219,POB 808,L-206, Livermore, CA 94550 USA.
EM meriaux1@llnl.gov; ryerson@llnl.gov; tappon@ipgp.jussieu.fr;
finkel1@llnl.gov; xxiwei@public3.bta.net/cn; xuzhiqin@ccsd.org.cn;
mcaffee@physics.purdue.edu
RI Meriaux, Anne-Sophie/G-1754-2010; Tapponnier, .Paul/B-7033-2011; Caffee,
Marc/K-7025-2015
OI Tapponnier, .Paul/0000-0002-7135-1962; Caffee, Marc/0000-0002-6846-8967
NR 85
TC 112
Z9 129
U1 2
U2 16
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9313
EI 2169-9356
J9 J GEOPHYS RES-SOL EA
JI J. Geophys. Res.-Solid Earth
PD JUN 8
PY 2004
VL 109
IS B6
AR B06401
DI 10.1029/2003JB002558
PG 23
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 829YE
UT WOS:000222087200001
ER
PT J
AU Willey, TM
Vance, AL
Bostedt, C
van Buuren, T
Meulenberg, RW
Terminello, LJ
Fadley, CS
AF Willey, TM
Vance, AL
Bostedt, C
van Buuren, T
Meulenberg, RW
Terminello, LJ
Fadley, CS
TI Surface structure and chemical switching of thioctic acid adsorbed on
Au(111) as observed using near-edge X-ray absorption fine structure
SO LANGMUIR
LA English
DT Article
ID SELF-ASSEMBLED MONOLAYERS; GOLD SURFACES; FUNCTIONALIZED ALKANETHIOLS;
XPS CHARACTERIZATION; ORGANIC MONOLAYERS; ELECTRODES; PSEUDOROTAXANE;
ATTENUATION; RECOGNITION; ROTAXANE
AB Thioctic acid (a-lipoic acid) is a molecule with a large disulfide-containing base, a short alkyl chain with four CH2 units, and a carboxyl termination. Self-assembled monolayer (SAM) films of thioctic acid adsorbed on Au(l 11) have been investigated with near-edge X-ray absorption fine structure (NEXAFS) spectroscopy and X-ray photoelectron spectroscopy (XPS) to determine film quality, bonding, and morphology. Using standard preparation protocols for SAMs, that is, dissolving thioctic acid in ethanol and exposing gold to the solution, results in poor films. These films are highly disordered, contain a mixture of carboxyl and carboxylate terminations, have more than monolayer coverage, and exhibit unbound disulfide. Conversely, forming films by dissolving 1 mmol thioctic acid into 5% acetic acid in ethanol (as previously reported with carboxyl-terminated alkanethiols) forms ordered monolayers with small amounts of unbound sulfur. NEXAFS indicates tilted over endgroups with the carboxyl group normal on average 38degrees from the surface normal. Slight angle-dependent intensity modulations in other features indicate alkyl chains statistically more upright than prostrate on the surface. Reflection-absorption Fourier transform infrared (RA-FTIR) spectra indicate hydrogen bonding between neighboring molecules. In such well-formed monolayers, a stark reorientation occurs upon deprotonation of the endgroup by rinsing in a KOH solution. The carboxylate plane normal is now about 66degrees from sample normal, a much more upright orientation. Data indicate this reorientation may also cause a more upright orientation to the alkyl portion of the molecules.
C1 Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94551 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Willey, TM (reprint author), Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
EM willey1@llnl.gov
RI Willey, Trevor/A-8778-2011;
OI Willey, Trevor/0000-0002-9667-8830; Meulenberg,
Robert/0000-0003-2696-8792
NR 35
TC 42
Z9 42
U1 4
U2 22
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD JUN 8
PY 2004
VL 20
IS 12
BP 4939
EP 4944
DI 10.1021/la049868j
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 826RK
UT WOS:000221846000026
PM 15984254
ER
PT J
AU Zhang, Z
Fenter, P
Cheng, L
Sturchio, NC
Bedzyk, MJ
Predota, M
Bandura, A
Kubicki, JD
Lvov, SN
Cummings, PT
Chialvo, AA
Ridley, MK
Benezeth, P
Anovitz, L
Palmer, DA
Machesky, ML
Wesolowski, DJ
AF Zhang, Z
Fenter, P
Cheng, L
Sturchio, NC
Bedzyk, MJ
Predota, M
Bandura, A
Kubicki, JD
Lvov, SN
Cummings, PT
Chialvo, AA
Ridley, MK
Benezeth, P
Anovitz, L
Palmer, DA
Machesky, ML
Wesolowski, DJ
TI Ion adsorption at the rutile-water interface: Linking molecular and
macroscopic properties
SO LANGMUIR
LA English
DT Article
ID RAY STANDING WAVES; PRIMARY CHARGING BEHAVIOR; METAL-OXIDE SURFACES;
TRIPLE-LAYER MODEL; OBSERVED IN-SITU; DYNAMICS SIMULATION; SORPTION;
1ST-PRINCIPLES; REFLECTIVITY; DISSOCIATION
AB A comprehensive picture of the interface between aqueous solutions and the (110) surface of rutile (alpha-TiO(2)) is being developed by combining molecular-scale and macroscopic approaches, including experimental measurements, quantum calculations, molecular simulations, and Gouy-Chapman-Stern models. In situ X-ray reflectivity and X-ray standing-wave measurements are used to define the atomic arrangement of adsorbed ions, the coordination of interfacial water molecules, and substrate surface termination and structure. Ab initio calculations and molecular dynamics simulations, validated through direct comparison with the X-ray results, are used to predict ion distributions not measured experimentally. Potentiometric titration and ion adsorption results for rutile powders having predominant (110) surface expression provide macroscopic constraints of electrical double layer (EDL) properties (e.g., proton release) which are evaluated by comparison with a three-layer EDL model including surface oxygen proton affinities calculated using ab initio bond lengths and partial charges. These results allow a direct correlation of the three-dimensional, crystallographically controlled arrangements of various species (H(2)O, Na(+), Rb(+), Ca(2+), Sr(2+), Zn(2+), Y(3+), Nd(3+)) with macroscopic observables (H(+) release, metal uptake, zeta potential) and thermodynamic/electrostatic constraints. All cations are found to be adsorbed as "inner sphere" species bonded directly to surface oxygen atoms, while the specific binding geometries and reaction stoichiometries are dependent on ionic radius. Ternary surface complexes of sorbed cations with electrolyte anions are not observed. Finally, surface oxygen proton affinities computed using the MUSIC model are improved by incorporation of ab initio bond lengths and hydrogen bonding information derived from MD simulations. This multitechnique and multiscale approach demonstrates the compatibility of bond-valence models of surface oxygen proton affinities and Stern-based models of the EDL structure, with the actual molecular interfacial distributions observed experimentally, revealing new insight into EDL properties including specific binding sites and hydration states of sorbed ions, interfacial solvent properties (structure, diffusivity, dielectric constant), surface protonation and hydrolysis, and the effect of solution ionic strength.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
Northwestern Univ, Inst Environm Catalysis, Evanston, IL 60208 USA.
Univ Illinois, Chicago, IL 60607 USA.
Acad Sci Czech Republic, Inst Chem Proc Fundamentals, CR-16502 Prague, Czech Republic.
Vanderbilt Univ, Nashville, TN 37235 USA.
St Petersburg State Univ, St Petersburg, Russia.
Penn State Univ, University Pk, PA 16802 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
Texas Tech Univ, Lubbock, TX 79409 USA.
Illinois State Water Survey, Champaign, IL 61820 USA.
RP Fenter, P (reprint author), Argonne Natl Lab, ER-203, Argonne, IL 60439 USA.
EM Fenter@anl.gov
RI Zhang, Zhan/A-9830-2008; Bedzyk, Michael/B-7503-2009; Predota,
Milan/A-2256-2009; Cheng, Likwan/C-1436-2013; Bedzyk,
Michael/K-6903-2013; Bandura, Andrei/I-2702-2013; BENEZETH,
Pascale/H-7969-2014; Kubicki, James/I-1843-2012; Anovitz,
Lawrence/P-3144-2016; Cummings, Peter/B-8762-2013;
OI Zhang, Zhan/0000-0002-7618-6134; Predota, Milan/0000-0003-3902-0992;
Bandura, Andrei/0000-0003-2816-0578; BENEZETH,
Pascale/0000-0002-1841-2383; Kubicki, James/0000-0002-9277-9044;
Anovitz, Lawrence/0000-0002-2609-8750; Cummings,
Peter/0000-0002-9766-2216; Chialvo, Ariel/0000-0002-6091-4563; Fenter,
Paul/0000-0002-6672-9748
NR 70
TC 213
Z9 215
U1 12
U2 138
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD JUN 8
PY 2004
VL 20
IS 12
BP 4954
EP 4969
DI 10.1021/la0353834
PG 16
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 826RK
UT WOS:000221846000028
PM 15984256
ER
PT J
AU Johnson, SB
Yoon, TH
Kocar, BD
Brown, GE
AF Johnson, SB
Yoon, TH
Kocar, BD
Brown, GE
TI Adsorption of organic matter at mineral/water interfaces. 2.
Outer-sphere adsorption of maleate and implications for dissolution
processes
SO LANGMUIR
LA English
DT Article
ID BOEHMITE GAMMA-ALOOH; BENZENECARBOXYLATE SURFACE COMPLEXATION; GOETHITE
(ALPHA-FEOOH)/WATER INTERFACE; INFRARED SPECTROSCOPIC ANALYSIS; AQUEOUS
ALUMINA SUSPENSIONS; SOLID-SOLUTION INTERFACE; WATER INTERFACE;
COORDINATION CHEMISTRY; PROMOTED DISSOLUTION; CARBOXYLIC-ACIDS
AB The effects of the adsorption of a simple dicarboxylate low molecular weight organic anion, maleate, on the dissolution of a model aluminum oxide, corundum (alpha-Al2O3), have been examined over a range of different maleate concentrations (0.125-5.0 mM) and pH conditions (2-10). In situ attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopic measurements indicate that maleate binds predominantly as an outer-sphere, fully deprotonated complex (dropAlOH(2)(+)---Mal(2-)) at the corundum surface over the entire range of maleate concentrations and pH conditions investigated. In accordance with the ATR-FTIR findings, macroscopic adsorption data can be modeled as a function of maleate concentration and pH using an extended constant capacitance approach and a single dropAlOH(2)(+)---Mal(2-) species. Outersphere adsorption of maleate is found to significantly reduce the protolytic dissolution rate of corundum under acidic conditions (pH < 5). A likely mechanism involves steric protection of dissolution-active surface sites, whereby strong outer-sphere interactions with maleate hinder attack on those surface sites by dissolution-promoting species.
C1 Stanford Univ, Dept Geol & Environm Sci, Surface & Aqueous Geochem Grp, Stanford, CA 94305 USA.
Stanford Synchrotron Radiat Lab, SLAC, Menlo Pk, CA 94025 USA.
Stanford Univ, Dept Geol & Environm Sci, Soil & Environm Chem Grp, Stanford, CA 94305 USA.
RP Johnson, SB (reprint author), Stanford Univ, Dept Geol & Environm Sci, Surface & Aqueous Geochem Grp, Stanford, CA 94305 USA.
EM stephen.johnson@stanford.edu
NR 87
TC 57
Z9 58
U1 5
U2 46
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD JUN 8
PY 2004
VL 20
IS 12
BP 4996
EP 5006
DI 10.1021/la036288y
PG 11
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 826RK
UT WOS:000221846000032
PM 15984260
ER
PT J
AU Sundrani, D
Darling, SB
Sibener, SJ
AF Sundrani, D
Darling, SB
Sibener, SJ
TI Hierarchical assembly and compliance of aligned nanoscale polymer
cylinders in confinement
SO LANGMUIR
LA English
DT Article
ID BLOCK-COPOLYMER LITHOGRAPHY; THIN-FILMS; ALIGNMENT; ORIENTATION
AB We report a combined top-down/bottom-up hierarchical approach to fabricate massively parallel arrays of aligned nanoscale domains by means of the self-assembly of asymmetric polystyrene-block-poly(ethylene-alt-propylene) diblock copolymers. Silicon nitride grating substrates of various depths and periodicities are used to template the alignment of the high-aspect-ratio cylindrical polymer domains. Alignment is nucleated by polystyrene preferentially wetting the trough sidewalls and is thermally extended throughout the polymer film by defect annihilation. Topics discussed include a detailed analysis of the capacity of this system to accommodate lithographic defects and observations of alignment beyond the confined channel volumes. This graphoepitaxial methodology can be exploited in hybrid hard/soft condensed matter systems for a variety of applications.
C1 Univ Chicago, James Franck Inst, Chicago, IL 60637 USA.
Univ Chicago, Dept Chem, Chicago, IL 60637 USA.
Argonne Natl Lab, Div Sci Mat, Argonne, IL 60439 USA.
RP Sibener, SJ (reprint author), Univ Chicago, James Franck Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA.
EM s-sibener@uchicago.edu
NR 14
TC 141
Z9 141
U1 4
U2 41
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD JUN 8
PY 2004
VL 20
IS 12
BP 5091
EP 5099
DI 10.1021/la036123p
PG 9
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 826RK
UT WOS:000221846000044
PM 15984272
ER
PT J
AU Peterson, RB
Fields, CL
Gregg, BA
AF Peterson, RB
Fields, CL
Gregg, BA
TI Epitaxial chemical deposition of ZnO nanocolumns from NaOH
SO LANGMUIR
LA English
DT Article
ID ZINC-OXIDE FILMS; THIN-FILM; AQUEOUS-SOLUTIONS; GROWTH; ARRAY; SI
AB A new method of depositing expitaxial ZnO nanocolumns on sputter-coated ZnO substrates is described that utilizes supersaturated zincate species in sodium hydroxide solutions and requires no complexing agents. Uniform arrays of columns are grown reproducibly over entire substrates in 10-50 min. Columns are 50-2000 nm long and 50-100 nm wide. Strict substrate cleaning and/or preparation was not necessary with this method, in contrast to many other techniques, probably because the high pH generates a reproducible surface. The interfacial properties of the substrate are critical to lowering the activation energy for columnar growth; therefore films grow only on substrates precoated with ZnO, not on bare glass or ITO- or SnO(2)-coated glass. Factors affecting the column growth are elucidated, and experimental observations are correlated with crystal growth theory.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Fields, CL (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM clark.fields@unco.edu; brian_gegg@nrel.gov
NR 24
TC 227
Z9 230
U1 2
U2 55
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD JUN 8
PY 2004
VL 20
IS 12
BP 5114
EP 5118
DI 10.1021/la049683c
PG 5
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 826RK
UT WOS:000221846000048
PM 15984276
ER
PT J
AU Cruz, LR
Legnani, C
Matoso, IG
Ferreira, CL
Moutinho, HR
AF Cruz, LR
Legnani, C
Matoso, IG
Ferreira, CL
Moutinho, HR
TI Influence of pressure and annealing on the microstructural and
electro-optical properties of RF magnetron sputtered ITO thin films
SO MATERIALS RESEARCH BULLETIN
LA English
DT Article
DE thin films; sputtering; microstructure; electrical properties; optical
properties
ID SUBSTRATE-TEMPERATURE; OXIDE; CRYSTALLIZATION; TARGET
AB Indium tin oxide thin films were deposited at room temperature by RF magnetron sputtering, under different pressures, and annealed in vacuum (10(-6) Torr) in the 473-573 K temperature range. The microstructure of the films was analyzed in order to investigate its dependence on deposition pressure and annealing temperature. A correlation between microstructure and electro-optical properties was also established. Films produced at low pressures are crystalline and have higher conductivity than films deposited at high pressures. Films produced at high pressures are amorphous, but can be crystallized by annealing. With the increase in crystallinity, shifts of the absorption and plasma resonance edges to shorter wavelengths, attributed to an increase in carrier concentration, were observed at the transmittance spectra. (C) 2004 Elsevier Ltd. All rights reserved.
C1 Inst Mil Engn, BR-22290270 Rio De Janeiro, Brazil.
Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Cruz, LR (reprint author), Inst Mil Engn, Praca Gen Tiburcio 80, BR-22290270 Rio De Janeiro, Brazil.
EM leilacruz@ime.eb.br
RI Legnani, Cristiano/A-8475-2008
NR 13
TC 40
Z9 42
U1 0
U2 12
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0025-5408
J9 MATER RES BULL
JI Mater. Res. Bull.
PD JUN 8
PY 2004
VL 39
IS 7-8
BP 993
EP 1003
DI 10.1016/j.mattersbull.2004.03.008
PG 11
WC Materials Science, Multidisciplinary
SC Materials Science
GA 828WW
UT WOS:000222005400015
ER
PT J
AU Srinivasan, SG
Baskes, MI
AF Srinivasan, SG
Baskes, MI
TI On the Lennard-Jones EAM potential
SO PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING
SCIENCES
LA English
DT Article
DE defects; free energy; gruneisen; many-body; melting; molecular dynamics
ID EMBEDDED-ATOM-METHOD; CRYSTAL FLUID INTERFACE; MOLECULAR-DYNAMICS;
CONDENSED MATTER; FREE-ENERGY; METALS; LIQUID; FCC; IMPURITIES; ENTROPY
AB We describe a simple two-parameter analytic model, based on the embedded-atom-method formalism, that extends a short range Lennard-Jones potential into the many-body regime. We demonstrate that this is a first step toward a minimalist treatment of real materials with negligible angular forces. The ground-state structures in this model include all the common phases. In this framework, properties of a face-centred cubic (FCC) material such as temperature dependence of free energy, melting point, thermal expansion coefficients, Gruneisen parameters, elastic constants and defect properties are calculated as a function of the many-body parameters A and beta. These properties are then expressed as analytic functions of A and beta, as perturbations of the classical Lennard-Jones pair potential. Addition of the many-body effects to the classical Lennard-Jones pair potential brings the computed material properties to within the range of their experimental values for many FCC metals.
C1 Los Alamos Natl Lab, Struct Property Relat Grp MST8, Div Mat Sci, Los Alamos, NM 87545 USA.
RP Srinivasan, SG (reprint author), Los Alamos Natl Lab, Struct Property Relat Grp MST8, Div Mat Sci, POB 1663, Los Alamos, NM 87545 USA.
EM sgsrini@lanl.gov; baskes@lanl.gov
NR 41
TC 7
Z9 7
U1 1
U2 9
PU ROYAL SOC
PI LONDON
PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND
SN 1364-5021
EI 1471-2946
J9 P ROY SOC A-MATH PHY
JI Proc. R. Soc. A-Math. Phys. Eng. Sci.
PD JUN 8
PY 2004
VL 460
IS 2046
BP 1649
EP 1672
DI 10.1098/rspa.2003.1190
PG 24
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 825YP
UT WOS:000221795400006
ER
PT J
AU Chan, YS
Gray, LJ
Kaplan, T
Paulino, GH
AF Chan, YS
Gray, LJ
Kaplan, T
Paulino, GH
TI Green's function for a two-dimensional exponentially graded elastic
medium
SO PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING
SCIENCES
LA English
DT Article
DE functionally graded materials; Green's function; boundary-element
methods
ID STRESS INTENSITY FACTORS; NONHOMOGENEOUS MATERIALS; FRACTURE
AB The free-space Green function for a two-dimensional exponentially graded elastic medium is derived. The shear modulus It is assumed to be an exponential function of the Cartesian coordinates (x, y), i.e. mu equivalent to mu(x, y) = mu(0)e(2(beta1x+beta2y)), where mu(0), beta(1) and beta(2) are material constants, and the Poisson ratio is assumed constant. The Green function is shown to consist of a singular part, involving modified Bessel functions. and a non-singular term. The non-singular component is expressed in terms of one-dimensional Fourier-type integrals that can be computed by the fast Fourier transform.
C1 Univ Illinois, Dept Civil & Environm Engn, Newmark Lab, Urbana, IL 61801 USA.
Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
RP Univ Texas Pan Amer, Dept Math, 1201 W Univ Dr, Edinburg, TX 78541 USA.
EM chany@ornl.gov
RI Paulino, Glaucio/A-2426-2008
NR 27
TC 61
Z9 61
U1 1
U2 7
PU ROYAL SOC
PI LONDON
PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND
SN 1364-5021
EI 1471-2946
J9 P ROY SOC A-MATH PHY
JI Proc. R. Soc. A-Math. Phys. Eng. Sci.
PD JUN 8
PY 2004
VL 460
IS 2046
BP 1689
EP 1706
DI 10.1098/rspa.2003.1220
PG 18
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 825YP
UT WOS:000221795400008
ER
PT J
AU San Marchi, C
Despois, JF
Mortensen, A
AF San Marchi, C
Despois, JF
Mortensen, A
TI Uniaxial deformation of open-cell aluminum foam: the role of internal
damage
SO ACTA MATERIALIA
LA English
DT Article
DE foams; mechanical properties; elastic behavior; mechanical properties;
ductility; aluminum; damage
ID TENSILE BEHAVIOR; METALLIC FOAMS; PLASTIC-FLOW; FRACTURE; MECHANISMS;
COMPOSITE; EVOLUTION; ALLOYS
AB Internal damage accumulation is measured and shown to play a role in the mechanical response of replicated pure Al and Al-12Si open-cell foams. This internal damage is quantified by measuring the reduction in the foam's stiffness with strain. The brittle Si second phase fractures during deformation of Al-12Si foam, resulting in damage accumulation rates an order of magnitude greater than for pure Al foam. Elementary damage mechanics is used to relate the measured rate of damage accumulation to the foam's tensile failure strain. The analysis and experimental results highlight in particular the strong embrittling influence of brittle second phases within the foam, such as Si. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, Inst Mat, Lab Mech Met, CH-1015 Lausanne, Switzerland.
RP San Marchi, C (reprint author), Sandia Natl Labs, POB 969,MS-9402, Livermore, CA 94551 USA.
EM cwsanma@sandia.gov
RI Mortensen, Andreas/L-5078-2015
OI Mortensen, Andreas/0000-0002-8267-2008
NR 28
TC 68
Z9 68
U1 1
U2 11
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
J9 ACTA MATER
JI Acta Mater.
PD JUN 7
PY 2004
VL 52
IS 10
BP 2895
EP 2902
DI 10.1016/j.actamat.2004.02.035
PG 8
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 830LB
UT WOS:000222122500005
ER
PT J
AU Sell, C
Christensen, C
Muehlmeier, J
Tuttle, G
Li, ZY
Ho, KM
AF Sell, C
Christensen, C
Muehlmeier, J
Tuttle, G
Li, ZY
Ho, KM
TI Waveguide networks in three-dimensional layer-by-layer photonic crystals
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID BENDS; SLABS
AB Different types of waveguides and connections between them were fabricated in a three-dimensional (3D) layer-by-layer photonic crystal. The waveguides were formed by removing either a single rod or a series of rod fragments running in three mutually orthogonal directions. This provides the potential of forming a 3D network of waveguide channels with cross sectional dimensions on the order of one lattice constant. The propagation behavior of guided modes in these waveguide networks was probed using a network analyzer. High transmission efficiency (with loss below 0.5 dB) through various waveguide bends and networks with carefully designed geometries has been achieved. (C) 2004 American Institute of Physics.
C1 Iowa State Univ, Ctr Microelect Res, Ames, IA 50011 USA.
Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
RP Iowa State Univ, Ctr Microelect Res, Ames, IA 50011 USA.
EM gtuttle@iastate.edu
NR 16
TC 24
Z9 26
U1 1
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUN 7
PY 2004
VL 84
IS 23
BP 4605
EP 4607
DI 10.1063/1.1751212
PG 3
WC Physics, Applied
SC Physics
GA 824AV
UT WOS:000221656900003
ER
PT J
AU Edge, LF
Schlom, DG
Brewer, RT
Chabal, YJ
Williams, JR
Chambers, SA
Hinkle, C
Lucovsky, G
Yang, Y
Stemmer, S
Copel, M
Hollander, B
Schubert, J
AF Edge, LF
Schlom, DG
Brewer, RT
Chabal, YJ
Williams, JR
Chambers, SA
Hinkle, C
Lucovsky, G
Yang, Y
Stemmer, S
Copel, M
Hollander, B
Schubert, J
TI Suppression of subcutaneous oxidation during the deposition of amorphous
lanthanum aluminate on silicon
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ALTERNATIVE GATE DIELECTRICS; ATOMIC-BEAM DEPOSITION; HIGH-K
DIELECTRICS; OXIDE THIN-FILMS; HIGH-QUALITY; SI; LAALO3; GROWTH; LAYER;
SI(100)
AB Amorphous LaAlO3 thin films have been deposited by molecular beam deposition directly on silicon without detectable oxidation of the underlying substrate. We have studied these abrupt interfaces by Auger electron spectroscopy, high-resolution transmission electron microscopy, medium-energy ion scattering, transmission infrared absorption spectroscopy, and x-ray photoelectron spectroscopy. Together these techniques indicate that the films are fully oxidized and have less than 0.2 A of SiO2 at the interface between the amorphous LaAlO3 and silicon. These heterostructures are being investigated for alternative gate dielectric applications and provide an opportunity to control the interface between the silicon and the gate dielectric. (C) 2004 American Institute of Physics.
C1 Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA.
Rutgers State Univ, Dept Chem & Biol Chem, Piscataway, NJ 08854 USA.
Rutgers State Univ, Dept Biomed Engn & Phys, Piscataway, NJ 08854 USA.
Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA.
N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA.
IBM Corp, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA.
Forschungszentrum Julich, Inst Schichten & Grenzflachen ISGIIT, D-52425 Julich, Germany.
Forschungszentrum Julich, Ctr Nanoelect Syst Informat Technol, D-52425 Julich, Germany.
RP Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA.
EM schlom@ems.psu.edu
RI Hinkle, Christopher/B-8412-2008; Stemmer, Susanne/H-6555-2011; Chabal,
Yves/A-5998-2011; Schlom, Darrell/J-2412-2013; Schubert,
Jurgen/K-9543-2013;
OI Stemmer, Susanne/0000-0002-3142-4696; Chabal, Yves/0000-0002-6435-0347;
Schlom, Darrell/0000-0003-2493-6113; Schubert,
Jurgen/0000-0003-0185-6794; Copel, Matt/0000-0002-7729-2748
NR 27
TC 76
Z9 77
U1 0
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUN 7
PY 2004
VL 84
IS 23
BP 4629
EP 4631
DI 10.1063/1.1759065
PG 3
WC Physics, Applied
SC Physics
GA 824AV
UT WOS:000221656900011
ER
PT J
AU Li, ZY
Lin, LL
Ho, KM
AF Li, ZY
Lin, LL
Ho, KM
TI Light coupling with multimode photonic crystal waveguides
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID BENDS; TRANSMISSION
AB We use a transfer-matrix method (TMM) to investigate light coupling into and out of single-end multimode photonic crystal waveguides. Without multiple-reflection complexity, this approach allows for unambiguous quantitative determination of the coupling efficiency of external light into each guided mode and transition among various guided modes. The TMM can provide a powerful analytical tool to understand and design complex multimode photonic crystal waveguides. (C) 2004 American Institute of Physics.
C1 Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China.
Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
RP Chinese Acad Sci, Inst Phys, POB 603, Beijing 100080, Peoples R China.
EM lizy@aphy.iphy.ac.cn
NR 17
TC 21
Z9 22
U1 1
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUN 7
PY 2004
VL 84
IS 23
BP 4699
EP 4701
DI 10.1063/1.1760596
PG 3
WC Physics, Applied
SC Physics
GA 824AV
UT WOS:000221656900035
ER
PT J
AU Yen, BK
Schwickert, BE
Toney, MF
AF Yen, BK
Schwickert, BE
Toney, MF
TI Origin of low-friction behavior in graphite investigated by surface
x-ray diffraction
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID WEAR; CARBON; LUBRICATION
AB Contrary to popular belief, the slipperiness of graphite is not an intrinsic property. The presence of vapors, such as water, is required for graphite to lubricate; in vacuum or dry environments, the friction and wear rate of graphite are high. A widely accepted explanation involves weakening of the binding force between basal planes near the surface, thereby allowing these planes to shear easily. This weakening results from proposed chemisorption or intercalation of vapor molecules near the surface, leading to an increase in the interlayer spacing between near-surface basal planes. Here we use x-ray diffraction from a synchrotron source to show that the basal plane spacing at the surface is the same in vacuum, ambient air, or water vapor saturated air. These results refute this long-held view that the low friction behavior of graphite is due to shearing of weakened basal planes. (C) 2004 American Institute of Physics.
C1 IBM Corp, Almaden Res Ctr, San Jose, CA 95120 USA.
Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
RP Yen, BK (reprint author), Hitachi GST San Jose Res Ctr, 650 Harry Rd, San Jose, CA 95120 USA.
EM bing.yen@hgst.com
NR 18
TC 35
Z9 35
U1 1
U2 14
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUN 7
PY 2004
VL 84
IS 23
BP 4702
EP 4704
DI 10.1063/1.1760597
PG 3
WC Physics, Applied
SC Physics
GA 824AV
UT WOS:000221656900036
ER
PT J
AU Majumdar, A
Reddy, P
AF Majumdar, A
Reddy, P
TI Role of electron-phonon coupling in thermal conductance of
metal-nonmetal interfaces
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID KAPITZA CONDUCTANCE; TEMPERATURES; FEMTOSECOND; TRANSPORT
AB We theoretically show that the thermal conductance associated with electron-phonon coupling in a metal near a metal-nonmetal interface can be estimated as h(ep)=rootGk(p), where G is the volumetric electron-phonon coupling constant and k(p) is the phonon or lattice thermal conductivity of the metal. The expression suggests h(ep)approximate to1/rootT at temperatures comparable to the Debye temperature of the metal. The predicted values of h(ep) fall within the range of conductance values experimentally observed (0.3-1 GW/m(2) K), suggesting that it cannot be ignored, and could even play a dominant role at high temperatures. Predictions of the total thermal conductance, that include both electron-phonon and phonon-phonon interfacial conductances, show reasonable agreement in its temperature dependence with experimental data for TiN/MgO interfaces. (C) 2004 American Institute of Physics.
C1 Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Appl Sci & Technol Program, Berkeley, CA 94720 USA.
RP Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA.
EM majumdar@me.berkeley.edu
NR 18
TC 204
Z9 210
U1 10
U2 58
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUN 7
PY 2004
VL 84
IS 23
BP 4768
EP 4770
DI 10.1063/1.1758301
PG 3
WC Physics, Applied
SC Physics
GA 824AV
UT WOS:000221656900058
ER
PT J
AU Nersessian, N
Or, SW
Carman, GP
McCall, SK
Choe, W
Radousky, HB
McElfresh, MW
Pecharsky, VK
Pecharsky, AO
AF Nersessian, N
Or, SW
Carman, GP
McCall, SK
Choe, W
Radousky, HB
McElfresh, MW
Pecharsky, VK
Pecharsky, AO
TI Gd5Si2Ge2 composite for magnetostrictive actuator applications
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID MAGNETIC REFRIGERATION; SINGLE-CRYSTAL; GD-5(SI2GE2)
AB A composite system containing particles of Gd5Si2Ge2, which exhibit a colossal magnetic-field-induced strain, has been prepared. The composite is manufactured by embedding ball-milled Gd5Si2Ge2 particles with a size distribution of <600 mum in a resin matrix. The thermally induced volume strain in the composite resulting from phase transformation is found to be 1300 ppm. The magnetically induced linear strain resulting from phase transformation is also measured, from which the volume strain is deduced to be 1650 ppm. The volume strain from the composite is significantly lower than phase transformation strain of the bulk Gd5Si2Ge2 (8000 ppm) and is mainly attributed to nonalignment of the particles in the matrix. An analytical model for a 1-3 composite (particles aligned in a single direction in a polymer matrix) and a 0-3 composite (particles dispersed randomly in a polymer matrix) predicts significantly higher strains in a 1-3 composite. (C) 2004 American Institute of Physics.
C1 Univ Calif Los Angeles, Dept Mech & Aerosp Engn, Los Angeles, CA 90095 USA.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
RP Carman, GP (reprint author), Univ Calif Los Angeles, Dept Mech & Aerosp Engn, Engn 4, Los Angeles, CA 90095 USA.
EM carman@seas.ucla.edu
RI Or, Siu Wing/A-3608-2010; Choe, Wonyoung/H-8495-2012; McCall,
Scott/G-1733-2014
OI Choe, Wonyoung/0000-0003-0957-1187; McCall, Scott/0000-0002-7979-4944
NR 20
TC 13
Z9 13
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
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUN 7
PY 2004
VL 84
IS 23
BP 4801
EP 4803
DI 10.1063/1.1760891
PG 3
WC Physics, Applied
SC Physics
GA 824AV
UT WOS:000221656900069
ER
PT J
AU Pohl, R
Aldakov, D
Kubat, P
Jursikova, K
Marquez, M
Anzenbacher, P
AF Pohl, R
Aldakov, D
Kubat, P
Jursikova, K
Marquez, M
Anzenbacher, P
TI Strategies toward improving the performance of fluorescence-based
sensors for inorganic anions
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID RESONANCE ENERGY-TRANSFER; MOLECULAR WIRE APPROACH; SIGNAL
AMPLIFICATION; CONJUGATED POLYMER; RECEPTORS; PROTEIN
AB Two methods for improving signal transduction in simple fluorescence-based anion sensors utilizing resonance energy transfer or exciton delocalization method are described and their use in amplified anion sensing is demonstrated.
C1 Bowling Green State Univ, Dept Chem, Bowling Green, OH 43403 USA.
Bowling Green State Univ, Ctr Photochem Sci, Bowling Green, OH 43403 USA.
Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA.
RP Anzenbacher, P (reprint author), Bowling Green State Univ, Dept Chem, Bowling Green, OH 43403 USA.
EM pavel@bgnet.bgsu.edu
RI Kubat, Pavel/H-3655-2011
OI Kubat, Pavel/0000-0002-7861-9212
NR 19
TC 42
Z9 44
U1 0
U2 3
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PD JUN 7
PY 2004
IS 11
BP 1282
EP 1283
DI 10.1039/b315268e
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA 831GB
UT WOS:000222181800010
PM 15154037
ER
PT J
AU Pandey, S
Redden, RA
Fletcher, KA
Sasaki, DV
Kaifer, AE
Baker, GA
AF Pandey, S
Redden, RA
Fletcher, KA
Sasaki, DV
Kaifer, AE
Baker, GA
TI Generation and pH dependent superquenching of poly(amido) carboxlate
dendrons hosting a single "focal point" pyrene
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID ENERGY-TRANSFER; DANSYL UNITS; DENDRIMERS; IONS
AB Both pH and generation number play deterministic roles in the luminescence quenching efficiency of analytes toward a series of water-soluble, monopyrenyl poly(amido) carboxylate dendrons, with clear implications toward switchable or programmable chemosensors.
C1 New Mexico Inst Min & Technol, Dept Chem, Socorro, NM 87801 USA.
Sandia Natl Labs, Biomol Mat & Interface Sci Dept, MS 1413, Albuquerque, NM 87185 USA.
Univ Miami, Dept Chem, Coral Gables, FL 33124 USA.
Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
RP Pandey, S (reprint author), New Mexico Inst Min & Technol, Dept Chem, Socorro, NM 87801 USA.
EM pandey@nmt.edu; gabaker@lanl.gov
RI Baker, Gary/H-9444-2016
OI Baker, Gary/0000-0002-3052-7730
NR 18
TC 9
Z9 9
U1 0
U2 2
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PD JUN 7
PY 2004
IS 11
BP 1318
EP 1319
DI 10.1039/b403477
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA 831GB
UT WOS:000222181800028
PM 15154055
ER
PT J
AU Dorogov, KY
Dumont, E
Ho, NN
Churakov, AV
Kuzmina, LG
Poblet, JM
Schultz, AJ
Howard, JAK
Bau, R
Lledos, A
Nikonov, GI
AF Dorogov, KY
Dumont, E
Ho, NN
Churakov, AV
Kuzmina, LG
Poblet, JM
Schultz, AJ
Howard, JAK
Bau, R
Lledos, A
Nikonov, GI
TI Neutron and X-ray diffraction studies and DFT calculations of asymmetric
bis(silyl) niobocene hydrides
SO ORGANOMETALLICS
LA English
DT Article
ID NONCLASSICAL INTERLIGAND INTERACTIONS; SI INTERACTIONS; SIGMA-BONDS;
COMPLEXES
AB The first asymmetric bis(silyl) niobocene hydrides Cp2Nb(SiHMe2)H(SiXMe2) (2: X = F (a), Cl (b), Br (c), I (d)), having interligand interactions Nb-(HSi)-Si-...-X, were prepared by selective halogenation of the Si-H bond in Cp2Nb(SiHMe2)(2)H. X-ray studies of 2b,c and a combined X-ray/neutron diffraction study of 2b establish a slightly stronger interaction of the niobium-bound hydride with the halosilyl ligand.
C1 Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119992, Russia.
Univ Autonoma Barcelona, Dept Quim, Bellaterra 08193, Spain.
Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA.
RAS, Inst Gen & Inorgan Chem, Moscow 119991, Russia.
Univ Rovira & Virgili, Dept Quim Fis & Inorgan, Tarragona 43005, Spain.
Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA.
Univ Durham, Dept Chem, Durham DH1 3LE, England.
RP Bau, R (reprint author), Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119992, Russia.
EM bau@almaak.usc.edu; agusti@klingon.uab.es; nikonov@org.chem.msu.su
RI Dumont, Elise/A-9711-2010; Howard, Judith /H-7113-2012; Lledos,
Agusti/I-4936-2012; Churakov, Andrei/N-9225-2015; Poblet, Josep
M./A-2739-2008
OI Dumont, Elise/0000-0002-2359-111X; Lledos, Agusti/0000-0001-7909-422X;
Poblet, Josep M./0000-0002-4533-0623
NR 24
TC 15
Z9 15
U1 0
U2 3
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0276-7333
J9 ORGANOMETALLICS
JI Organometallics
PD JUN 7
PY 2004
VL 23
IS 12
BP 2845
EP 2847
DI 10.1021/om034239a
PG 3
WC Chemistry, Inorganic & Nuclear; Chemistry, Organic
SC Chemistry
GA 825QR
UT WOS:000221773600006
ER
PT J
AU Cameron, TM
Gordon, JC
Scott, BL
AF Cameron, TM
Gordon, JC
Scott, BL
TI Synthesis and characterization of (mono)pentamethylcyclopentadienyl
lutetium complexes: Formation of bipyridyl-stabilized alkyls, anilides,
and terminal acetylides
SO ORGANOMETALLICS
LA English
DT Article
ID CARBON BOND FORMATION; RARE-EARTH-METALS; AMIDO-CYCLOPENTADIENYL LIGAND;
ORGANOMETALLIC CHEMISTRY; STRUCTURAL-CHARACTERIZATION; POLYMERIZATION
CATALYSTS; STERIC UNSATURATION; CRYSTAL-STRUCTURES; LANTHANIDES;
REACTIVITY
AB The alkyl complex [Lu(CH2SiMe3)(3)(THF)(2)] reacts with pentamethylcyclopentadiene (Cp*H), giving [CP*Lu(CH2SiMe3)(2)(THF)] (1). Complex 1 reacts with 1,2-dimethoxyethane (DME), affording [Cp*Lu(CH2SiMe3)(2)(DME)] (2). Complex 1 also reacts with 2,2'-bipyridine (bipy) to give [Cp*Lu(CH2SiMe3)(2)(bipy)] (3). The dialkyl complex 3 reacts with 1.0 equiv of 2,6-diisopropylaniline to give the mixed alkyl-anilide [Cp*Lu(NHAr)(CH2SiMe3)(bipy)] (4) (Ar = 2,6-Pri(2)C(6)H(3)) and the bis(anilide) [Cp*Lu(NHAr)(2)(bipy)] (5) in a 1.0:0.09 ratio. Complex 5 can be independently synthesized in high yield by treatment of 3 with 2.0 equiv of 2,6-diisopropylaniline or 4 with 1.0 equiv of 2,6-diisopropylaniline. Complex 3 also reacts with 2.0 equiv of phenylacetylene to afford dimeric [{Cp*Lu(CCPh)(bipy)}(2)(mu-eta(2) : eta(2)-PhC4Ph)] . 2(C6H6) (6). Complex 6 reacts with THF and pyridine (py), giving terminal (bis)acetylide complexes [Cp*Lu(CCPh)(2)(bipy)(THF)] (7) and [Cp*Lu(CCPh)(2)(bipy)(py)] (8), respectively. The solid-state structures of 1, 2, 4, 5, 6, and 8 are reported.
C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87544 USA.
RP Cameron, TM (reprint author), Los Alamos Natl Lab, Div Chem, MS J514, Los Alamos, NM 87544 USA.
RI Scott, Brian/D-8995-2017
OI Scott, Brian/0000-0003-0468-5396
NR 44
TC 53
Z9 53
U1 0
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0276-7333
J9 ORGANOMETALLICS
JI Organometallics
PD JUN 7
PY 2004
VL 23
IS 12
BP 2995
EP 3002
DI 10.1021/om0497700
PG 8
WC Chemistry, Inorganic & Nuclear; Chemistry, Organic
SC Chemistry
GA 825QR
UT WOS:000221773600026
ER
PT J
AU Malwitz, MM
Dundigalla, A
Ferreiro, V
Butler, PD
Henk, MC
Schmidt, G
AF Malwitz, MM
Dundigalla, A
Ferreiro, V
Butler, PD
Henk, MC
Schmidt, G
TI Layered structures of shear-oriented and multilayered PEO/silicate
nanocomposite films
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID POLYMER-CLAY SOLUTIONS; ANGLE NEUTRON-SCATTERING; ATOMIC-FORCE
MICROSCOPY; POLY(ETHYLENE OXIDE); FLOW-BIREFRINGENCE; THERMAL/MECHANICAL
PROPERTIES; ELECTRICAL CHARACTERIZATION; MELT INTERCALATION;
ORIENTATION; PHASE
AB The structure and orientation of polymer and clay platelets in multilayered, micrometer-thick nanocomposite films was investigated by means of scanning electron microscopy (SEM), atomic force microscopy (AFM), optical microscopy and small-angle neutron scattering (SANS). Microscopic and scattering methods complementarily measured the morphology and shear-induced orientation of polymer and platelets in films when spread layer by layer from a network-like polymer clay solution. During the drying process, the polymer clay network collapsed and clay platelets oriented inside the network with the clay surface normal perpendicular to the spread direction (x-y plane). On nanometer length scales, SANS and AFM yielded structure and orientation of platelets and polymer in and perpendicular to the spread direction of the film. SEM investigations led to the observation of unexpected morphology on the micron length scale. SEM did not detect boundaries between single spread, micron-thick film layers but. surprisingly. showed a highly ordered and layered structure of the film. Polarized light microscopy showed differences in birefringence in each plane.
C1 Louisiana State Univ, Dept Chem, Baton Rouge, LA 70803 USA.
Univ Sci & Technol Lille, CNRS, UMR 8008, Lab Struct & Properties Etat Solide, Villeneuve Dascq, France.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Malwitz, MM (reprint author), Louisiana State Univ, Dept Chem, Baton Rouge, LA 70803 USA.
EM gudrun@LSU.edu
RI Butler, Paul/D-7368-2011
NR 52
TC 29
Z9 29
U1 0
U2 11
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1463-9076
J9 PHYS CHEM CHEM PHYS
JI Phys. Chem. Chem. Phys.
PD JUN 7
PY 2004
VL 6
IS 11
BP 2977
EP 2982
DI 10.1039/b401892c
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 833RW
UT WOS:000222357600029
ER
PT J
AU Zeng, GSL
Gullberg, GT
AF Zeng, GSL
Gullberg, GT
TI Cone-beam and fan-beam image reconstruction algorithms based on
spherical and circular harmonics
SO PHYSICS IN MEDICINE AND BIOLOGY
LA English
DT Article; Proceedings Paper
CT 7th International Conference on Fully Three-Dimensional Reconstruction
in Radiation and Nuclear Medicine
CY JUN 30-JUL 04, 2003
CL Saint Malo, FRANCE
ID LINE INTEGRALS; SPECT
AB A cone-beam image reconstruction algorithm using spherical harmonic expansions is proposed. The reconstruction algorithm is in the form of a summation of inner products of two discrete arrays of spherical harmonic expansion coefficients at each cone-beam point of acquisition. This form is different from the common filtered backprojection algorithm and the direct Fourier reconstruction algorithm. There is no re-sampling of the data, and spherical harmonic expansions are used instead of Fourier expansions. As a special case, a new fan-beam image reconstruction algorithm is also derived in terms of a circular harmonic expansion. Computer simulation results for both cone-beam and fan-beam algorithms are presented for circular planar orbit acquisitions. The algorithms give accurate reconstructions; however, the implementation of the cone-beam reconstruction algorithm is computationally intensive. A relatively efficient algorithm is proposed for reconstructing the central slice of the image when a circular scanning orbit is used.
C1 Univ Utah, Utah Ctr Adv Imaging Res, Salt Lake City, UT 84108 USA.
EO Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Zeng, GSL (reprint author), Univ Utah, Utah Ctr Adv Imaging Res, 729 Arapeen Dr, Salt Lake City, UT 84108 USA.
EM larry@ucair.med.utah.edu; gtgullberg@lbl.gov
FU NCI NIH HHS [R21-CA100181]; NIBIB NIH HHS [R01-EB00121]
NR 17
TC 5
Z9 5
U1 1
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0031-9155
J9 PHYS MED BIOL
JI Phys. Med. Biol.
PD JUN 7
PY 2004
VL 49
IS 11
BP 2239
EP 2256
AR PII S0031-9155(04)70992-6
DI 10.1088/0031-9155/49/11/009
PG 18
WC Engineering, Biomedical; Radiology, Nuclear Medicine & Medical Imaging
SC Engineering; Radiology, Nuclear Medicine & Medical Imaging
GA 831SQ
UT WOS:000222216800010
PM 15248575
ER
PT J
AU Smith, MF
Raylmann, RR
Majewski, S
Weisenberger, AG
AF Smith, MF
Raylmann, RR
Majewski, S
Weisenberger, AG
TI Positron emission mammography with tomographic acquisition using dual
planar detectors: initial evaluations
SO PHYSICS IN MEDICINE AND BIOLOGY
LA English
DT Article; Proceedings Paper
CT 7th International Conference on Fully Three-Dimensional Reconstruction
in Radiation and Nuclear Medicine
CY JUN 30-JUL 04, 2003
CL Saint Malo, FRANCE
ID BREAST-CANCER; MAXIMUM-LIKELIHOOD; PEM; RECONSTRUCTION; RESOLUTION;
SCANNERS; SCATTER; PHANTOM; DESIGN; CAMERA
AB Positron emission mammography (PEM) with tomographic acquisition using dual planar detectors rotating about the breast can obtain complete angular sampling and has the potential to improve activity estimation compared with PEM using stationary detectors. PEM tomography (PEMT) was compared with stationary PEM for point source and compressed breast phantom studies performed with a compact dual detector system. The acquisition geometries were appropriate for the target application of PEM guidance of stereotactic core biopsy. Images were reconstructed with a three-dimensional iterative maximum likelihood expectation maximization algorithm. PEMT eliminated blurring normal to the detectors seen with stationary PEM. Depth of interaction effects distorted the shape of the point spread functions for PEMT as the angular range from normal incidence of lines of response used in image reconstruction increased. Streak artefacts in PEMT for large detector rotation increments led to the development of an expression for the maximum rotation increment that maintains complete angular sampling. Studies with a compressed breast phantom were used to investigate contrast and signal-to-noise ratio (SNR) trade-offs for different sized spherical tumour models. PEMT and PEM both had advantages depending on lesion size and detector separation. The most appropriate acquisition method for specific detection or quantitation tasks requires additional investigation.
C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
W Virginia Univ, Dept Radiol, Ctr Adv Imaging, Morgantown, WV 26506 USA.
RP Smith, MF (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
EM mfsmith@jlaob.org
FU NCI NIH HHS [R01 CA094196]
NR 28
TC 30
Z9 30
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0031-9155
J9 PHYS MED BIOL
JI Phys. Med. Biol.
PD JUN 7
PY 2004
VL 49
IS 11
BP 2437
EP 2452
AR PII S0031-9155(04)70995-1
DI 10.1088/0031-9155/49/11/022
PG 16
WC Engineering, Biomedical; Radiology, Nuclear Medicine & Medical Imaging
SC Engineering; Radiology, Nuclear Medicine & Medical Imaging
GA 831SQ
UT WOS:000222216800023
PM 15248588
ER
PT J
AU Chang, JH
Shim, CH
Kim, KJ
Liu, J
AF Chang, JH
Shim, CH
Kim, KJ
Liu, J
TI A step-growth model for molecular mechanisms of monolayer formation in
ordered nanoporous channels
SO CHEMISTRY LETTERS
LA English
DT Article
ID FUNCTIONALIZED MONOLAYERS
AB The work describes the direct evidence of a new step-growth mechanism in which the silane molecules are first deposited in the wide region of the mesoporous surface. When the wide pore region is filled, the silane molecules begin to deposit in the narrow pore region. The pore size in the wide region and narrow region change alternatively and discretely in accordance with the step-growth mechanism and the molecular size of the silane.
C1 Korea Inst Ceram Engn & Technol, Seoul 153801, South Korea.
Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Chang, JH (reprint author), Korea Inst Ceram Engn & Technol, Seoul 153801, South Korea.
NR 11
TC 0
Z9 0
U1 0
U2 2
PU CHEMICAL SOC JAPAN
PI TOKYO
PA 1-5 KANDA-SURUGADAI CHIYODA-KU, TOKYO, 101-8307, JAPAN
SN 0366-7022
EI 1348-0715
J9 CHEM LETT
JI Chem. Lett.
PD JUN 5
PY 2004
VL 33
IS 6
BP 722
EP 723
DI 10.1246/cl.2004.722
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA 830WQ
UT WOS:000222155300040
ER
PT J
AU Comstock, JM
Ackerman, TP
Turner, DD
AF Comstock, JM
Ackerman, TP
Turner, DD
TI Evidence of high ice supersaturation in cirrus clouds using ARM Raman
lidar measurements
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID WATER-VAPOR MEASUREMENTS; RELATIVE-HUMIDITY; UPPER TROPOSPHERE;
RADIATION; EVOLUTION; NORTHERN; REGIONS
AB Water vapor amounts in the upper troposphere are crucial to understanding the radiative feedback of cirrus clouds on the Earth's climate. We use a unique, year-long dataset of water vapor mixing ratio inferred from ground-based Raman lidar measurements to study the role of ice supersaturation in ice nucleation processes. We find that ice supersaturation occurs 31% of the time in over 300,000 data points. We also examine the distribution of ice supersaturation with height and find that in the uppermost portion of a cloud layer, the air is ice supersaturated 43% of the time. These measurements show that large ice supersaturation is common in cirrus clouds, which supports the theory of ice forming homogeneously. Given the continuous nature of these Raman lidar measurements, our results have important implications for studying ice nucleation processes using cloud microphysical models.
C1 Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Comstock, JM (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM jennifer.comstock@pnl.gov
OI Jakob, Christian/0000-0002-5012-3207
NR 21
TC 52
Z9 52
U1 2
U2 9
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 JUN 5
PY 2004
VL 31
IS 11
AR L11106
DI 10.1029/2004GL019705
PG 4
WC Geosciences, Multidisciplinary
SC Geology
GA 828DI
UT WOS:000221952800004
ER
PT J
AU Jacob, GC
Fellers, JF
Starbuck, JM
Simunovic, S
AF Jacob, GC
Fellers, JF
Starbuck, JM
Simunovic, S
TI Crashworthiness of automotive composite material systems
SO JOURNAL OF APPLIED POLYMER SCIENCE
LA English
DT Article
DE composites; fibers; resins
ID ENERGY-ABSORPTION CAPABILITY; CRUSHING CHARACTERISTICS; TUBES; FIBER;
EPOXY; BEHAVIOR; SECTIONS
AB The energy absorption capability of a composite material is important in developing improved human safety in an automotive crash. In passenger vehicles, the ability to absorb impact energy and be survivable for the occupant is called the crashworthiness of the structure. The crashworthiness in terms of the specific energy absorption (SEA) of a chopped carbon fiber (CCF) composite material system was compared with that of other fiber resin systems such as graphite/epoxy cross-ply laminates (CP#1 and CP#2), a graphite/epoxy-braided material system (0), and a glass-reinforced continuous-strand mat (CSM). The quantity of these material systems needed to ensure passenger safety in a midsize car traveling at various velocities was calculated and compared. The SEA of the chopped carbon fiber composite material was the highest compared to that of all the other composites investigated. It was calculated that only 4.27 kg of it would need to be placed at specific places in the car to ensure passenger safety in the event of a crash at 15.5 m/s (35 mph). This clearly led to an important practical conclusion that only a reasonable amount of this composite material is required to meet the necessary impact performance standard. The CCF composite tested at 5 mm/min crushing speed met both the criteria that need to be satisfied before a material is deemed highly crashworthy: A high magnitude of energy absorption and a safe allowable rate of this energy absorption. (C) 2004 Wiley Periodicals, Inc.
C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
Oak Ridge Natl Lab, Polymer Matrix Composites Grp, Met & Ceram Div, Oak Ridge, TN 37831 USA.
Oak Ridge Natl Lab, Computat Mat Sci Comp Sci & Math Div, Oak Ridge, TN 37831 USA.
RP Jacob, GC (reprint author), Univ Tennessee, Dept Mat Sci & Engn, 434 Dougherty Engn, Knoxville, TN 37996 USA.
EM gjacob@utk.edu
RI Starbuck, James/E-1442-2017
OI Starbuck, James/0000-0002-3814-9156
NR 44
TC 12
Z9 12
U1 4
U2 24
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0021-8995
J9 J APPL POLYM SCI
JI J. Appl. Polym. Sci.
PD JUN 5
PY 2004
VL 92
IS 5
BP 3218
EP 3225
DI 10.1002/app.20336
PG 8
WC Polymer Science
SC Polymer Science
GA 811GC
UT WOS:000220759400057
ER
PT J
AU Paller, MH
Jagoe, CH
Bennett, H
Brant, HA
Bowers, JA
AF Paller, MH
Jagoe, CH
Bennett, H
Brant, HA
Bowers, JA
TI Influence of methylmercury from tributary streams on mercury levels in
Savannah River Asiatic clams
SO SCIENCE OF THE TOTAL ENVIRONMENT
LA English
DT Article
DE methylmercury; mercury; Corbicula; streams; wetlands; Savannah River
ID INORGANIC MERCURY; CORBICULA-FLUMINEA; METHYLATION; CADMIUM; LAKES;
MISSISSIPPI; SYSTEMS; INPUTS; PH
AB Average methylmercury levels in five Savannah River tributary streams, sampled 11 times over 2 years (0.170 ng/l), were nearly twice as high as in the Savannah River (0.085 ng/l). Total mercury levels in the tributaries (2.98 ng/l) did not differ significantly from the river (2.59 ng/l). All of the tributaries drained extensive wetlands that would be expected to support comparatively high rates of methylation. Mercury concentrations in Asiatic clams (Corbicula fluminea) collected from the discharge plumes of Savannah River tributaries (average of 0.044 mug/g wet weight) were significantly (P<0.001) higher than in Asiatic clams collected from the Savannah River upstream from the tributary mouths (average of 0.017 mug/g wet weight). These results indicate that streams draining wetlands into coastal plain rivers can create localized areas of elevated methylmercury with resulting increases in the mercury levels of river biota. (C) 2003 Elsevier B.V. All rights reserved.
C1 Westinghouse Savannah River Co, Environm Anal Sect, Aiken, SC 29808 USA.
Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA.
Univ S Carolina, Dept Biol, Aiken, SC 29803 USA.
RP Paller, MH (reprint author), Westinghouse Savannah River Co, Environm Anal Sect, Bldg 773-42A,Savannah River Site, Aiken, SC 29808 USA.
EM michael.paller@srs.gov
NR 28
TC 13
Z9 18
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0048-9697
J9 SCI TOTAL ENVIRON
JI Sci. Total Environ.
PD JUN 5
PY 2004
VL 325
IS 1-3
BP 209
EP 219
DI 10.1016/j.scitotenv.2003.11.008
PG 11
WC Environmental Sciences
SC Environmental Sciences & Ecology
GA 824YI
UT WOS:000221722700018
PM 15144790
ER
PT J
AU Li, HP
Martin, RB
Harruff, BA
Carino, RA
Allard, LF
Sun, YP
AF Li, HP
Martin, RB
Harruff, BA
Carino, RA
Allard, LF
Sun, YP
TI Single-walled carbon nanotubes tethered with porphyrins: Synthesis and
photophysical properties
SO ADVANCED MATERIALS
LA English
DT Article
ID SELF-ASSEMBLED MONOLAYERS; INTRAMOLECULAR ELECTRON-TRANSFER; CONJUGATED
POLYMERS; CHAIN-LENGTH; FUNCTIONALIZATION; LUMINESCENCE; COMPOSITES;
SURFACES; PYRENES
C1 Clemson Univ, Dept Chem, Howard L Hunter Chem Lab, Clemson, SC 29634 USA.
Oak Ridge Natl Lab, High Temp Mat Lab, Oak Ridge, TN 37831 USA.
RP Sun, YP (reprint author), Clemson Univ, Dept Chem, Howard L Hunter Chem Lab, Clemson, SC 29634 USA.
EM syaping@CLEMSON.EDU
RI Li, Huaping/E-1456-2011
NR 38
TC 134
Z9 139
U1 2
U2 33
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0935-9648
J9 ADV MATER
JI Adv. Mater.
PD JUN 4
PY 2004
VL 16
IS 11
BP 896
EP 900
DI 10.1002/adma.200306288
PG 5
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 835XH
UT WOS:000222518300010
ER
PT J
AU Silver, GL
AF Silver, GL
TI Analysis of three-dimensional grids: the eight-point cube
SO APPLIED MATHEMATICS AND COMPUTATION
LA English
DT Article
DE cube; operational equations; response surface; quadratic coefficient;
shifting operator
ID DIAMOND CONFIGURATION
AB It is widely believed that quadratic coefficients cannot be estimated from eight data in cubical array. This paper illustrates the estimation of those coefficients by means of by operational equations. The coefficients are compared to the quadratic coefficients obtained by Taylor expansion of the functions generating the data. The agreement may be sufficient to interest experimentalists. (C) 2003 Elsevier Inc. All rights reserved.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Silver, GL (reprint author), Los Alamos Natl Lab, POB 1663,MS E502, Los Alamos, NM 87545 USA.
EM gsilver@lanl.gov
NR 5
TC 11
Z9 11
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0096-3003
J9 APPL MATH COMPUT
JI Appl. Math. Comput.
PD JUN 4
PY 2004
VL 153
IS 2
BP 467
EP 473
DI 10.1016/S0096-3003(03)00647-7
PG 7
WC Mathematics, Applied
SC Mathematics
GA 831JP
UT WOS:000222191000014
ER
PT J
AU Natarajan, P
Forte, TM
Chu, B
Phillips, MC
Oram, JF
Bielicki, JK
AF Natarajan, P
Forte, TM
Chu, B
Phillips, MC
Oram, JF
Bielicki, JK
TI Identification of an apolipoprotein A-I structural element that mediates
cellular cholesterol efflux and stabilizes ATP binding cassette
transporter A1
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID HIGH-DENSITY-LIPOPROTEIN; CORONARY HEART-DISEASE; TANGIER-DISEASE; LIPID
EFFLUX; APOA-I; HELICAL PEPTIDES; ANTIOXIDANT ACTIVITY; SYNTHETIC
PEPTIDES; PEST SEQUENCE; ABCA1
AB Synthetic peptides were used in this study to identify a structural element of apolipoprotein (apo) A-I that stimulates cellular cholesterol efflux and stabilizes the ATP binding cassette transporter A1 (ABCA1). Peptides (22-mers) based on helices 1 (amino acids 44-65) and 10 (amino acids 220-241) of apoA-I had high lipid binding affinity but failed to mediate ABCA1-dependent cholesterol efflux, and they lacked the ability to stabilize ABCA1. The addition of helix 9 (amino acids 209-219) to either helix 1 (creates a 1/9 chimera) or 10 (9/10 peptide) endowed cholesterol efflux capability and ABCA1 stabilization activity similar to full-length apoA-I. Adding helix 9 to helix 1 or 10 had only a small effect on lipid binding affinity compared with the 22-mer peptides, indicating that helix length and/or determinants on the polar surface of the amphipathic alpha-helices is important for cholesterol efflux. Cholesterol efflux was specific for the structure created by the 1/9 and 9/10 helical combinations, as 33-mers composed of helices 1 and 3 (1/3), 2/9, and 4/9 failed to mediate cholesterol efflux in an ABCA1-dependent manner. Transposing helices 9 and 10 (10/9 peptide) did not change the class Y structure, hydrophobicity, or amphiphilicity of the helical combination, but the topography of negatively charged amino acids on the polar surface was altered, and the 10/9 peptide neither mediated ABCA1-dependent cholesterol efflux nor stabilized ABCA1 protein. These results suggest that a specific structural element possessing a linear array of acidic residues spanning two apoA-I amphipathic alpha-helices is required to mediate cholesterol efflux and stabilize ABCA1.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Donner Lab, Berkeley, CA 94720 USA.
Univ Penn, Sch Med, Childrens Hosp Philadelphia, Lipid Res Grp, Philadelphia, PA 19104 USA.
Univ Washington, Sch Med, Dept Med Endocrinol & Nutr, Seattle, WA 98195 USA.
RP Bielicki, JK (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Donner Lab, MS1-224,1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM Jkbielicki@lbl.gov
OI Natarajan, Pradeep/0000-0001-8402-7435
FU NHLBI NIH HHS [HL059483, HL18645, HL22633, HL55362, HL55493]
NR 46
TC 52
Z9 53
U1 0
U2 2
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 JUN 4
PY 2004
VL 279
IS 23
BP 24044
EP 24052
DI 10.1074/jbc.M400561200
PG 9
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 824RA
UT WOS:000221702500026
PM 15051721
ER
PT J
AU Gritti, F
Guiochon, G
AF Gritti, F
Guiochon, G
TI Role of the buffer in retention and adsorption mechanism of ionic
species in reversed-phase liquid chromatography - I. Analytical and
overloaded band profiles on Kromasil-C-18
SO JOURNAL OF CHROMATOGRAPHY A
LA English
DT Article
DE retention mechanism; adsorption isotherms; buffer composition; frontal
analysis; band profiles; Kromasil-C-18 stationary phase; salt effects;
ionic strength; propranolol
ID WATER MOBILE PHASES; IONIZABLE COMPOUNDS; ORGANIC-SOLVENT; PH VALUES;
ISOTHERM; PERFORMANCE; HPLC; REPRODUCIBILITY; REPEATABILITY; ACIDS
AB The influence of the pH, the concentration, and the nature of the buffer on the retention and overloading behavior of propranolol (pK(a) = 9.25) on Kromasil-C-18 was studied at 2.75 < pH < 6.75, using four buffers (phosphate, acetate, phthalate, and succinate), at three concentrations, 6, 20, and 60 mM. The propranolol band profiles were recorded for three sample sizes, less than 1 mug and 375 mug (sample less concentrated than the buffer), and 7500 mug (band more concentrated than the buffer). Results showed that the buffer concentration, not its pH, controls the retention time of propranolol, in agreement with the chaotropic model. The retention factor depends also on the nature of the buffer, particularly the valence of the basic anion. At moderate loading, the band profiles are well accounted for by a simple bilangmuir model (no adsorbate-adsorbate interactions) with the monovalent anions H2PO4- (pH 2.75), HOOC-Ph-COO- (pH 2.75), HOOC-CH2-CH2-COO- (pH 4.16) and CH3COO- (pH 4.75), and by a bimoreau model (significant adsorbate-adsorbate interactions) with the bivalent anions -OOC-Ph-COO- (pH 4.75), -OOC-CH2-CH2-COO- (pH 5.61) and HPO42- (pH 6.75). The isotherm were determined using the inverse method. The results show that both the saturation capacity and the equilibrium constant on the low-energy sites increase with increasing buffer concentration, a result similar to that observed with neutral salts. For bivalent anions, the adsorbate-adsorbate interactions are much stronger on the low than on the high energy sites. The density of high energy sites is lower and the equilibrium constant on the low energy sites are higher with bivalent than with univalent anions. These results are consistent with the formation of a propranolol-buffer (2: 1) complex with bivalent anions. (C) 2004 Elsevier B.V. All rights reserved.
C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
RP Guiochon, G (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM guiochon@utk.edu
NR 34
TC 58
Z9 59
U1 1
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0021-9673
J9 J CHROMATOGR A
JI J. Chromatogr. A
PD JUN 4
PY 2004
VL 1038
IS 1-2
BP 53
EP 66
DI 10.1016/j.chroma.2004.03.036
PG 14
WC Biochemical Research Methods; Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA 824SZ
UT WOS:000221708200008
PM 15233521
ER
PT J
AU Samoilenko, AM
Prykarpatsky, YA
Taneri, U
Prykarpatsky, AK
Blackmore, DL
AF Samoilenko, AM
Prykarpatsky, YA
Taneri, U
Prykarpatsky, AK
Blackmore, DL
TI A geometrical approach to quantum holonomic computing algorithms
SO MATHEMATICS AND COMPUTERS IN SIMULATION
LA English
DT Article
DE quantum computers; quantum algorithms; dynamical systems; Grassmann
manifolds; symplectic structures; connections; holonomy groups; lax type
integrable flows
AB The article continues a presentation of modern quantum mathematics backgrounds started in [Quantum Mathematics and its Applications. Part 1. Automatyka, vol. 6, AGH Publisher, Krakow, 2002, No. 1, pp. 234-2412; Quantum Mathematics: Holonomic Computing Algorithms and Their Applications. Part 2. Automatyka, vol. 7, No. 1, 2004]. A general approach to quantum holonomic computing based on geometric Lie-algebraic structures on Grassmann manifolds and related with them Lax type flows is proposed. Making use of the differential geometric techniques like momentum mapping reduction, central extension and connection theory on Stiefel bundles it is shown that the associated holonomy groups properly realizing quantum computations can be effectively found concerning, diverse practical problems. Two examples demonstrating two-form curvature calculations important for describing the corresponding holonomy Lie algebra are presented in detail. (C) 2004 IMACS. Published by Elsevier B.V. All rights reserved.
C1 Natl Acad Sci, Inst Math, UA-01004 Kiev, Ukraine.
SDIC, Brookhaven Natl Lab, Upton, NY 11973 USA.
Univ Wisconsin, Dept Educ Adm, Madison, WI 53706 USA.
Eastern Mediterranean Univ, Dept Math & Comp Sci, Famagusta, Turkey.
AGH Univ Sci & Technol, Dept Appl Math, PL-30059 Krakow, Poland.
Natl Acad Sci, Inst APMM, Dept Nonlinear Math Anal, PL-79601 Lviv, Poland.
New Jersey Inst Technol, Dept Math Sci, Newark, NJ 07102 USA.
RP Prykarpatsky, AK (reprint author), Natl Acad Sci, Inst Math, UA-01004 Kiev, Ukraine.
EM sam@imath.kiev.ua; yarchyk@bnl.gov; utaneri@education.wisc.edu;
prykanat@cyberg1.com; deblac@m.njit.edu
NR 29
TC 1
Z9 1
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-4754
J9 MATH COMPUT SIMULAT
JI Math. Comput. Simul.
PD JUN 4
PY 2004
VL 66
IS 1
BP 1
EP 20
DI 10.1016/j.matcom.2004.01.017
PG 20
WC Computer Science, Interdisciplinary Applications; Computer Science,
Software Engineering; Mathematics, Applied
SC Computer Science; Mathematics
GA 830HQ
UT WOS:000222113100001
ER
PT J
AU Abazov, VM
Abbott, B
Abdesselam, A
Abolins, M
Abramov, V
Acharya, BS
Adams, DL
Adams, M
Ahmed, SN
Alexeev, GD
Alton, A
Alves, GA
Anderson, EW
Arnoud, Y
Avila, C
Babintsev, VV
Babukhadia, L
Bacon, TC
Baden, A
Baffioni, S
Baldin, B
Balm, PW
Banerjee, S
Barberis, E
Baringer, P
Barreto, J
Bartlett, JF
Bassler, U
Bauer, D
Bean, A
Beaudette, F
Begel, M
Belyaev, A
Beri, SB
Bernardi, G
Bertram, I
Besson, A
Beuselinck, R
Bezzubov, VA
Bhat, PC
Bhatnagar, V
Bhattacharjee, M
Blazey, G
Blekman, F
Blessing, S
Boehnlein, A
Bojko, NI
Bolton, TA
Borcherding, F
Bos, K
Bose, T
Brandt, A
Briskin, G
Brock, R
Brooijmans, G
Bross, A
Buchholz, D
Buehler, M
Buescher, V
Burtovoi, VS
Butler, JM
Canelli, F
Carvalho, W
Casey, D
Castilla-Valdez, H
Chakraborty, D
Chan, KM
Chekulaev, SV
Cho, DK
Choi, S
Chopra, S
Claes, D
Clark, AR
Connolly, B
Cooper, WE
Coppage, D
Crepe-Renaudin, S
Cummings, MAC
Cutts, D
da Motta, H
Davis, GA
De, K
de Jong, SJ
Demarteau, M
Demina, R
Demine, P
Denisov, D
Denisov, SP
Desai, S
Diehl, HT
Diesburg, M
Doulas, S
Dudko, LV
Duensing, S
Duflot, L
Dugad, SR
Duperrin, A
Dyshkant, A
Edmunds, D
Ellison, J
Eltzroth, JT
Elvira, VD
Engelmann, R
Eno, S
Eppley, G
Ermolov, P
Eroshin, OV
Estrada, J
Evans, H
Evdokimov, VN
Fein, D
Ferbel, T
Filthaut, F
Fisk, HE
Fleuret, F
Fortner, M
Fox, H
Fu, S
Fuess, S
Gallas, E
Galyaev, AN
Gao, M
Gavrilov, V
Genik II, RJ
Genser, K
Gerber, CE
Gershtein, Y
Ginther, G
Gomez, B
Goncharov, PI
Gordon, H
Gounder, K
Goussiou, A
Graf, N
Grannis, PD
Green, JA
Greenlee, H
Greenwood, ZD
Grinstein, S
Groer, L
Grunendahl, S
Gurzhiev, SN
Gutierrez, G
Gutierrez, P
Hadley, NJ
Haggerty, H
Hagopian, S
Hagopian, V
Hall, RE
Han, C
Hansen, S
Hauptman, JM
Hebert, C
Hedin, D
Heinmiller, JM
Heinson, AP
Heintz, U
Hildreth, MD
Hirosky, R
Hobbs, JD
Hoeneisen, B
Huang, J
Huang, Y
Iashvili, I
Illingworth, R
Ito, AS
Jaffre, M
Jain, S
Jesik, R
Johns, K
Johnson, M
Jonckheere, A
Jostlein, H
Juste, A
Kahl, W
Kahn, S
Kajfasz, E
Kalinin, AM
Karmanov, D
Karmgard, D
Kehoe, R
Khanov, A
Kharchilava, A
Klima, B
Kohli, JM
Kostritskiy, AV
Kotcher, J
Kothhari, B
Kozelov, AV
Kozlovsky, EA
Krane, J
Krishnaswamy, MR
Krivkova, P
Krzywdzinski, S
Kubantsev, M
Kuleshov, S
Kulik, Y
Kunori, S
Kupco, A
Kuznetsov, VE
Landsberg, G
Lee, WM
Leflat, A
Lehner, F
Leonidopoulos, C
Li, J
Li, QZ
Lima, JGR
Lincoln, D
Linn, SL
Linnemann, J
Lipton, R
Lucotte, A
Lueking, L
Lundstedt, C
Luo, C
Maciel, AKA
Madaras, RJ
Malyshev, VL
Manankov, V
Mao, HS
Marshall, T
Martin, MI
Mayorov, AA
McCarthy, R
McMahon, T
Melanson, HL
Merkin, M
Merritt, KW
Miao, C
Miettinen, H
Mihalcea, D
Mokhov, N
Mondal, NK
Montgomery, HE
Moore, RW
Mutaf, YD
Nagy, E
Nang, F
Narain, M
Narasimham, VS
Naumann, NA
Neal, HA
Negret, JP
Nomerotski, A
Nunnemann, T
O'Neil, D
Oguri, V
Olivier, B
Oshima, N
Padley, P
Papageorgiou, K
Parashar, N
Partridge, R
Parua, N
Patwa, A
Peters, O
Petroff, P
Piegaia, R
Pope, BG
Prosper, HB
Protopopescu, S
Przybycien, MB
Qian, J
Quadt, A
Raja, R
Rajagopalan, S
Rapidis, PA
Reay, NW
Reucroft, S
Ridel, M
Rijssenbeek, M
Rizatdinova, F
Rockwell, T
Royon, C
Rubinov, P
Ruchti, R
Sabirov, BM
Sajot, G
Santoro, A
Sawyer, L
Schamberger, RD
Schellman, H
Schwartzman, A
Shabalina, E
Shivpuri, RK
Shpakov, D
Shupe, M
Sidwell, RA
Simak, V
Sirotenko, V
Slattery, P
Smith, RP
Snow, GR
Snow, J
Snyder, S
Solomon, J
Song, Y
Sorin, V
Sosebee, M
Sotnikova, N
Soustruznik, K
Souza, M
Stanton, NR
Steinbruck, G
Stoker, D
Stolin, V
Stone, A
Stoyanova, DA
Strang, MA
Strauss, M
Strovink, M
Stutte, L
Sznajder, A
Talby, M
Taylor, W
Tentindo-Repond, S
Tripathi, SM
Trippe, TG
Turcot, AS
Tuts, PM
Van Kooten, R
Vaniev, V
Varelas, N
Villeneuve-Seguier, F
Volkov, AA
Vorobiev, AP
Wahl, HD
Wang, ZM
Warchol, J
Watts, G
Wayne, M
Weerts, H
White, A
Whiteson, D
Wijngaarden, DA
Willis, S
Wimpenny, SJ
Womersley, J
Wood, DR
Xu, Q
Yamada, R
Yamin, P
Yasuda, T
Yatsunenko, YA
Yip, K
Yu, J
Zanabria, M
Zhang, X
Zheng, H
Zhou, B
Zhou, Z
Zielinski, M
Zieminska, D
Zieminski, A
Zutshi, V
Zverev, EG
Zylberstejn, A
AF Abazov, VM
Abbott, B
Abdesselam, A
Abolins, M
Abramov, V
Acharya, BS
Adams, DL
Adams, M
Ahmed, SN
Alexeev, GD
Alton, A
Alves, GA
Anderson, EW
Arnoud, Y
Avila, C
Babintsev, VV
Babukhadia, L
Bacon, TC
Baden, A
Baffioni, S
Baldin, B
Balm, PW
Banerjee, S
Barberis, E
Baringer, P
Barreto, J
Bartlett, JF
Bassler, U
Bauer, D
Bean, A
Beaudette, F
Begel, M
Belyaev, A
Beri, SB
Bernardi, G
Bertram, I
Besson, A
Beuselinck, R
Bezzubov, VA
Bhat, PC
Bhatnagar, V
Bhattacharjee, M
Blazey, G
Blekman, F
Blessing, S
Boehnlein, A
Bojko, NI
Bolton, TA
Borcherding, F
Bos, K
Bose, T
Brandt, A
Briskin, G
Brock, R
Brooijmans, G
Bross, A
Buchholz, D
Buehler, M
Buescher, V
Burtovoi, VS
Butler, JM
Canelli, F
Carvalho, W
Casey, D
Castilla-Valdez, H
Chakraborty, D
Chan, KM
Chekulaev, SV
Cho, DK
Choi, S
Chopra, S
Claes, D
Clark, AR
Connolly, B
Cooper, WE
Coppage, D
Crepe-Renaudin, S
Cummings, MAC
Cutts, D
da Motta, H
Davis, GA
De, K
de Jong, SJ
Demarteau, M
Demina, R
Demine, P
Denisov, D
Denisov, SP
Desai, S
Diehl, HT
Diesburg, M
Doulas, S
Dudko, LV
Duensing, S
Duflot, L
Dugad, SR
Duperrin, A
Dyshkant, A
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Genik II, RJ
Genser, K
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Goncharov, PI
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Goussiou, A
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Greenlee, H
Greenwood, ZD
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Groer, L
Grunendahl, S
Gurzhiev, SN
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Gutierrez, P
Hadley, NJ
Haggerty, H
Hagopian, S
Hagopian, V
Hall, RE
Han, C
Hansen, S
Hauptman, JM
Hebert, C
Hedin, D
Heinmiller, JM
Heinson, AP
Heintz, U
Hildreth, MD
Hirosky, R
Hobbs, JD
Hoeneisen, B
Huang, J
Huang, Y
Iashvili, I
Illingworth, R
Ito, AS
Jaffre, M
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Johns, K
Johnson, M
Jonckheere, A
Jostlein, H
Juste, A
Kahl, W
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Kajfasz, E
Kalinin, AM
Karmanov, D
Karmgard, D
Kehoe, R
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Kharchilava, A
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Kostritskiy, AV
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Krane, J
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Krivkova, P
Krzywdzinski, S
Kubantsev, M
Kuleshov, S
Kulik, Y
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Kuznetsov, VE
Landsberg, G
Lee, WM
Leflat, A
Lehner, F
Leonidopoulos, C
Li, J
Li, QZ
Lima, JGR
Lincoln, D
Linn, SL
Linnemann, J
Lipton, R
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Lundstedt, C
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Madaras, RJ
Malyshev, VL
Manankov, V
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Mayorov, AA
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McMahon, T
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Merkin, M
Merritt, KW
Miao, C
Miettinen, H
Mihalcea, D
Mokhov, N
Mondal, NK
Montgomery, HE
Moore, RW
Mutaf, YD
Nagy, E
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Naumann, NA
Neal, HA
Negret, JP
Nomerotski, A
Nunnemann, T
O'Neil, D
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Olivier, B
Oshima, N
Padley, P
Papageorgiou, K
Parashar, N
Partridge, R
Parua, N
Patwa, A
Peters, O
Petroff, P
Piegaia, R
Pope, BG
Prosper, HB
Protopopescu, S
Przybycien, MB
Qian, J
Quadt, A
Raja, R
Rajagopalan, S
Rapidis, PA
Reay, NW
Reucroft, S
Ridel, M
Rijssenbeek, M
Rizatdinova, F
Rockwell, T
Royon, C
Rubinov, P
Ruchti, R
Sabirov, BM
Sajot, G
Santoro, A
Sawyer, L
Schamberger, RD
Schellman, H
Schwartzman, A
Shabalina, E
Shivpuri, RK
Shpakov, D
Shupe, M
Sidwell, RA
Simak, V
Sirotenko, V
Slattery, P
Smith, RP
Snow, GR
Snow, J
Snyder, S
Solomon, J
Song, Y
Sorin, V
Sosebee, M
Sotnikova, N
Soustruznik, K
Souza, M
Stanton, NR
Steinbruck, G
Stoker, D
Stolin, V
Stone, A
Stoyanova, DA
Strang, MA
Strauss, M
Strovink, M
Stutte, L
Sznajder, A
Talby, M
Taylor, W
Tentindo-Repond, S
Tripathi, SM
Trippe, TG
Turcot, AS
Tuts, PM
Van Kooten, R
Vaniev, V
Varelas, N
Villeneuve-Seguier, F
Volkov, AA
Vorobiev, AP
Wahl, HD
Wang, ZM
Warchol, J
Watts, G
Wayne, M
Weerts, H
White, A
Whiteson, D
Wijngaarden, DA
Willis, S
Wimpenny, SJ
Womersley, J
Wood, DR
Xu, Q
Yamada, R
Yamin, P
Yasuda, T
Yatsunenko, YA
Yip, K
Yu, J
Zanabria, M
Zhang, X
Zheng, H
Zhou, B
Zhou, Z
Zielinski, M
Zieminska, D
Zieminski, A
Zutshi, V
Zverev, EG
Zylberstejn, A
CA DO Collaboration
TI Search for narrow t(t)over-bar resonances in p(p)over-bar collisions at
root s=1.8 TeV
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID PARTON DISTRIBUTIONS; SYMMETRY-BREAKING; PHYSICS
AB A search for narrow resonances that decay into t (t) over bar pairs has been performed using 130 pb(-1) of data in the lepton + jets channel collected by the DO detector in p (p) over bar collisions at roots=1.8 TeV. There is no significant deviation observed from the standard-model predictions at a top-quark mass of 175 GeV/c(2). We therefore present upper limits at the 95% confidence level on the product of the production cross section and branching fraction to t (t) over bar for narrow resonances as a function of the resonance mass M-X. These limits are used to exclude the existence of a leptophobic top-color particle with mass M-X<560 GeV/c(2), using a theoretical cross section for a width Gamma(X)=0.012M(X).
C1 Joint Inst Nucl Res, Dubna, Russia.
Univ Buenos Aires, Buenos Aires, DF, Argentina.
Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil.
Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil.
Inst High Energy Phys, Beijing 100039, Peoples R China.
Univ Los Andes, Bogota, Colombia.
Charles Univ Prague, Ctr Particle Phys, Prague, Czech Republic.
Acad Sci, Inst Phys, Ctr Particle Phys, Prague, Czech Republic.
Univ San Francisco Quito, Quito, Ecuador.
Univ Grenoble 1, Lab Phys Subatom & Cosmol, IN2P3, CNRS, Grenoble, France.
Univ Aix Marseille 2, CPPM, IN2P3, CNRS, Marseille, France.
IN2P3, CNRS, Lab Accelerateux Lineaire, Orsay, France.
Univ Paris 06, LPNHE, IN2P3, CNRS, Paris, France.
Univ Paris 07, LPNHE, IN2P3, CNRS, Paris, France.
CEA, DAPNIA, Serv Phys Particules, Saclay, France.
Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany.
Panjab Univ, Chandigarh 160014, India.
Univ Delhi, Delhi 110007, India.
Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India.
CINVESTAV, Mexico City 14000, DF, Mexico.
NIKHEF, FOM Inst, Amsterdam, Netherlands.
Univ Amsterdam, NIKHEF, Amsterdam, Netherlands.
Univ Nijmegen, NIKHEF, Nijmegen, Netherlands.
Inst Theoret & Expt Phys, Moscow 117259, Russia.
Inst Theoret & Expt Phys, Moscow 117259, Russia.
Univ Lancaster, Lancaster, England.
Univ London Imperial Coll Sci Technol & Med, London, England.
Univ Arizona, Tucson, AZ 85721 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
Univ Calif Davis, Davis, CA 95616 USA.
Calif State Univ Fresno, Fresno, CA 93740 USA.
Univ Calif Irvine, Irvine, CA 92697 USA.
Univ Calif Riverside, Riverside, CA 92521 USA.
Florida State Univ, Tallahassee, FL 32306 USA.
Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
Univ Illinois, Chicago, IL 60607 USA.
No Illinois Univ, De Kalb, IL 60115 USA.
Northwestern Univ, Evanston, IL 60208 USA.
Indiana Univ, Bloomington, IN 47405 USA.
Univ Notre Dame, Notre Dame, IN 46556 USA.
Iowa State Univ Sci & Technol, Ames, IA 50011 USA.
Kansas State Univ, Manhattan, KS 66506 USA.
Louisiana Tech Univ, Ruston, LA 71272 USA.
Univ Maryland, College Pk, MD 20742 USA.
Boston Univ, Boston, MA 02215 USA.
Northeastern Univ, Boston, MA 02115 USA.
Univ Michigan, Ann Arbor, MI 48109 USA.
Michigan State Univ, E Lansing, MI 48824 USA.
Univ Nebraska, Lincoln, NE 68588 USA.
Columbia Univ, New York, NY 10027 USA.
Univ Rochester, Rochester, NY 14627 USA.
SUNY Stony Brook, Stony Brook, NY 11794 USA.
Brookhaven Natl Lab, Upton, NY 11973 USA.
Langston Univ, Langston, OK 73050 USA.
Univ Oklahoma, Norman, OK 73019 USA.
Brown Univ, Providence, RI 02912 USA.
Univ Texas, Arlington, TX 76019 USA.
Rice Univ, Houston, TX 77005 USA.
Univ Virginia, Charlottesville, VA 22901 USA.
Univ Washington, Seattle, WA 98195 USA.
Univ Kansas, Lawrence, KS 66045 USA.
Inst High Energy Phys, Protvino, Russia.
Moscow MV Lomonosov State Univ, Moscow, Russia.
RP Joint Inst Nucl Res, Dubna, Russia.
RI Santoro, Alberto/E-7932-2014; Belyaev, Alexander/F-6637-2015; Chekulaev,
Sergey/O-1145-2015; Sznajder, Andre/L-1621-2016; Canelli,
Florencia/O-9693-2016; Nomerotski, Andrei/A-5169-2010; Shivpuri, R
K/A-5848-2010; Gutierrez, Phillip/C-1161-2011; Dudko, Lev/D-7127-2012;
Leflat, Alexander/D-7284-2012; Merkin, Mikhail/D-6809-2012; Yip,
Kin/D-6860-2013; Kuleshov, Sergey/D-9940-2013; De, Kaushik/N-1953-2013;
Oguri, Vitor/B-5403-2013; Alves, Gilvan/C-4007-2013
OI Belyaev, Alexander/0000-0002-1733-4408; Sznajder,
Andre/0000-0001-6998-1108; Canelli, Florencia/0000-0001-6361-2117;
Dudko, Lev/0000-0002-4462-3192; Yip, Kin/0000-0002-8576-4311; Kuleshov,
Sergey/0000-0002-3065-326X; De, Kaushik/0000-0002-5647-4489;
NR 19
TC 23
Z9 23
U1 0
U2 0
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 JUN 4
PY 2004
VL 92
IS 22
AR 221801
DI 10.1103/PhysRevLett.92.221801
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 826QU
UT WOS:000221844400011
PM 15245211
ER
PT J
AU Albuquerque, IFM
Burdman, G
Chacko, Z
AF Albuquerque, IFM
Burdman, G
Chacko, Z
TI Neutrino telescopes as a direct probe of supersymmetry breaking
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
AB We consider models where the scale of supersymmetry breaking lies between 5x10(6) and 5x10(8) GeV. In this class of theories, which includes models of mediated supersymmetry breaking, the lightest supersymmetric particle is the gravitino, and the next to lightest is typically a long-lived charged slepton with a lifetime between a microsecond and a second, depending on its mass. We investigate the production of these particles by the diffuse flux of high energy neutrinos colliding with nucleons in the Earth, and the potential for their observation in large ice or water Cerenkov detectors. The small production cross section is partially compensated by the very long range of sleptons. The signal, two well-separated parallel tracks, has very little background. Using the Waxman-Bahcall limit for the neutrino flux results in up to four events a year in km(3) experiments.
C1 Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Theory Grp, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RP Albuquerque, IFM (reprint author), Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA.
RI Burdman, Gustavo/D-3285-2012; Albuquerque, Ivone/H-4645-2012
OI Albuquerque, Ivone/0000-0001-7328-0136
NR 32
TC 43
Z9 44
U1 0
U2 0
PU AMERICAN 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 JUN 4
PY 2004
VL 92
IS 22
AR 221802
DI 10.1103/PhysRevLett.92.221802
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 826QU
UT WOS:000221844400012
PM 15245212
ER
PT J
AU Aubert, B
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Gaillard, JM
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Ivanchenko, VN
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Wright, DM
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Payne, DJ
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Harrison, PF
Mohanty, GB
Brown, CL
Cowan, G
Flack, RL
Flaecher, HU
George, S
Green, MG
Kurup, A
Marker, CE
McMahon, TR
Ricciardi, S
Salvatore, F
Vaitsas, G
Winter, MA
Brown, D
Davis, CL
Allison, J
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Barlow, RJ
Hart, PA
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Lafferty, GD
Lyon, AJ
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Blaylock, G
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Va'vra, J
Wagner, SR
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Weinstein, AJR
Wisniewski, WJ
Wright, DH
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Kutter, PE
Li, H
Liu, R
Lodovico, FD
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Sekula, SJ
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Neal, H
AF Aubert, B
Barate, R
Boutigny, D
Couderc, F
Gaillard, JM
Hicheur, A
Karyotakis, Y
Lees, JP
Tisserand, V
Zghiche, A
Palano, A
Pompili, A
Chen, JC
Qi, ND
Rong, G
Wang, P
Zhu, YS
Eigen, G
Ofte, I
Stugu, B
Abrams, GS
Borgland, AW
Breon, AB
Brown, DN
Button-Shafer, J
Cahn, RN
Charles, E
Day, CT
Gill, MS
Gritsan, AV
Groysman, Y
Jacobsen, RG
Kadel, RW
Kadyk, J
Kerth, LT
Kolomensky, YG
Kukartsev, G
LeClerc, C
Levi, ME
Lynch, G
Mir, LM
Oddone, PJ
Orimoto, TJ
Pripstein, M
Roe, NA
Ronan, MT
Shelkov, VG
Telnov, AV
Wenzel, WA
Ford, K
Harrison, TJ
Hawkes, CM
Morgan, SE
Watson, AT
Watson, NK
Fritsch, M
Goetzen, K
Held, T
Koch, H
Lewandowski, B
Pelizaeus, M
Peters, K
Schmuecker, H
Steinke, M
Boyd, JT
Chevalier, N
Cottingham, WN
Kelly, MP
Latham, TE
Mackay, C
Wilson, FF
Abe, K
Cuhadar-Donszelmann, T
Hearty, C
Mattison, TS
McKenna, JA
Thiessen, D
Kyberd, P
McKemey, AK
Teodorescu, L
Blinov, VE
Bukin, AD
Golubev, VB
Ivanchenko, VN
Kravchenko, EA
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Yushkov, AN
Best, D
Bruinsma, M
Chao, M
Eschrich, I
Kirkby, D
Lankford, AJ
Mandelkern, M
Mommsen, RK
Roethel, W
Stoker, DP
Buchanan, C
Hartfiel, BL
Gary, JW
Layter, J
Shen, BC
Wang, K
del Re, D
Hadavand, HK
Hill, EJ
MacFarlane, DB
Paar, HP
Rahatlou, S
Sharma, V
Berryhill, JW
Campagnari, C
Dahmes, B
Levy, SL
Long, O
Lu, A
Mazur, MA
Richman, JD
Verkerke, W
Beck, TW
Beringer, J
Eisner, AM
Heusch, CA
Lockman, WS
Schalk, T
Schmitz, RE
Schumm, BA
Seiden, A
Spradlin, P
Walkowiak, W
Williams, DC
Wilson, MG
Albert, J
Chen, E
Dubois-Felsmann, GP
Dvoretskii, A
Erwin, RJ
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Ryd, A
Samuel, A
Yang, S
Jayatilleke, S
Mancinelli, G
Meadows, BT
Sokoloff, MD
Abe, T
Blanc, F
Bloom, P
Chen, S
Clark, PJ
Ford, WT
Nauenberg, U
Olivas, A
Rankin, P
Roy, J
Smith, JG
van Hoek, WC
Zhang, L
Harton, JL
Hu, T
Soffer, A
Toki, WH
Wilson, RJ
Zhang, J
Altenburg, D
Brandt, T
Brose, J
Colberg, T
Dickopp, M
Feltresi, E
Hauke, A
Lacker, HM
Maly, E
Muller-Pfefferkorn, R
Nogowski, R
Otto, S
Schubert, J
Schubert, KR
Schwierz, R
Spaan, B
Bernard, D
Bonneaud, GR
Brochard, F
Grenier, P
Thiebaux, C
Vasileiadis, G
Verderi, M
Bard, DJ
Khan, A
Lavin, D
Muheim, F
Playfer, S
Andreotti, M
Azzolini, V
Bettoni, D
Bozzi, C
Calabrese, R
Cibinetto, G
Luppi, E
Negrini, M
Piemontese, L
Sarti, A
Treadwell, E
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Finocchiaro, G
Patteri, P
Piccolo, M
Zallo, A
Buzzo, A
Capra, R
Contri, R
Crosetti, G
Vetere, ML
Macri, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Bailey, S
Morii, M
Won, E
Dubitzky, RS
Langenegger, U
Bhimji, W
Bowerman, DA
Dauncey, PD
Egede, U
Gaillard, JR
Morton, GW
Nash, JA
Taylor, GP
Grenier, GJ
Lee, SJ
Mallik, U
Cochran, J
Crawley, HB
Lamsa, J
Meyer, WT
Prell, S
Rosenberg, EI
Yi, J
Davier, M
Grosdidier, G
Hocker, A
Laplace, S
Le Diberder, F
Lepeltier, V
Lutz, AM
Petersen, TC
Plaszczynski, S
Schune, MH
Tantot, L
Wormser, G
Brigljevic, V
Cheng, CH
Lange, DJ
Simani, MC
Wright, DM
Bevan, AJ
Coleman, JP
Fry, JR
Gabathuler, E
Gamet, R
Kay, M
Parry, RJ
Payne, DJ
Sloane, RJ
Touramanis, C
Back, JJ
Harrison, PF
Mohanty, GB
Brown, CL
Cowan, G
Flack, RL
Flaecher, HU
George, S
Green, MG
Kurup, A
Marker, CE
McMahon, TR
Ricciardi, S
Salvatore, F
Vaitsas, G
Winter, MA
Brown, D
Davis, CL
Allison, J
Barlow, NR
Barlow, RJ
Hart, PA
Hodgkinson, MC
Lafferty, GD
Lyon, AJ
Williams, JC
Farbin, A
Hulsbergen, WD
Jawahery, A
Kovalskyi, D
Lae, CK
Lillard, V
Roberts, DA
Blaylock, G
Dallapiccola, C
Flood, KT
Hertzbach, SS
Kofler, R
Koptchev, VB
Moore, TB
Saremi, S
Staengle, H
Willocq, S
Cowan, R
Sciolla, G
Taylor, F
Yamamoto, RK
Mangeol, DJJ
Patel, PM
Robertson, SH
Lazzaro, A
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Reidy, J
Sanders, DA
Summers, DJ
Zhao, HW
Brunet, S
Cote-Ahern, D
Taras, P
Nicholson, H
Cartaro, C
Cavallo, N
De Nardo, G
Fabozzi, F
Gatto, C
Lista, L
Paolucci, P
Piccolo, D
Sciacca, C
Baak, MA
Raven, G
Wilden, L
Jessop, CP
LoSecco, JM
Gabriel, TA
Allmendinger, T
Brau, B
Gan, KK
Honscheid, K
Hufnagel, D
Kagan, H
Kass, R
Pulliam, T
Ter-Antonyan, R
Wong, QK
Brau, J
Frey, R
Igonkina, O
Potter, CT
Sinev, NB
Strom, D
Torrence, E
Colecchia, F
Dorigo, A
Galeazzi, F
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Tiozzo, G
Voci, C
Benayoun, M
Briand, H
Chauveau, J
David, P
de la Vaissiere, C
Del Buono, L
Hamon, O
John, MJJ
Leruste, P
Ocariz, J
Pivk, M
Roos, L
T'Jampens, S
Therin, G
Manfredi, PF
Re, V
Behera, PK
Gladney, L
Guo, QH
Panetta, J
Anulli, F
Biasini, M
Peruzzi, IM
Pioppi, M
Angelini, C
Batignani, G
Bettarini, S
Bondioli, M
Bucci, F
Calderini, G
Carpinelli, M
Del Gamba, V
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Martinez-Vidal, F
Morganti, M
Neri, N
Paoloni, E
Rama, M
Rizzo, G
Sandrelli, F
Walsh, J
Haire, M
Judd, D
Paick, K
Wagoner, DE
Danielson, N
Elmer, P
Lu, C
Miftakov, V
Olsen, J
Smith, AJS
Varnes, EW
Bellini, F
Cavoto, G
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Mazzoni, MA
Morganti, S
Pierini, M
Piredda, G
Tehrani, FS
Voena, C
Christ, S
Wagner, G
Waldi, R
Adye, T
De Groot, N
Franek, B
Geddes, NI
Gopal, GP
Olaiya, EO
Xella, SM
Aleksan, R
Emery, S
Gaidot, A
Ganzhur, SF
Giraud, PF
de Monchenault, GH
Kozanecki, W
Langer, M
Legendre, M
London, GW
Mayer, B
Schott, G
Vasseur, G
Yeche, C
Zito, M
Purohit, MV
Weidemann, AW
Yumiceva, FX
Aston, D
Bartoldus, R
Berger, N
Boyarski, AM
Buchmueller, OL
Convery, MR
Christinziani, M
Dong, D
Dorfan, J
Dujmic, D
Dunwoodie, W
Elsen, EE
Field, RC
Glanzman, T
Gowdy, SJ
Hadig, T
Halyo, V
Hryn'ova, T
Innes, WR
Kelsey, MH
Kim, P
Kocian, ML
Leith, DWGS
Libby, J
Luitz, S
Luth, V
Lynch, HL
Marsiske, H
Messner, R
Muller, DR
O'Grady, CP
Ozcan, VE
Perazzo, A
Perl, M
Petrak, S
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Simi, G
Snyder, A
Soha, A
Stelzer, J
Su, D
Sullivan, MK
Va'vra, J
Wagner, SR
Weaver, M
Weinstein, AJR
Wisniewski, WJ
Wright, DH
Young, CC
Burchat, PR
Edwards, AJ
Meyer, TI
Petersen, BA
Roat, C
Ahmed, M
Ahmed, S
Alam, MS
Ernst, JA
Saeed, MA
Saleem, M
Wappler, FR
Bugg, W
Krishnamurthy, M
Spanier, SM
Eckmann, R
Kim, H
Ritchie, JL
Satpathy, A
Schwitters, RF
Izen, JM
Kitayama, I
Lou, XC
Ye, S
Bianchi, F
Bona, M
Gallo, F
Gamba, D
Borean, C
Bosisio, L
Cossutti, F
Della Ricca, G
Dittongo, S
Grancagnolo, S
Lanceri, L
Poropat, P
Vitale, L
Vuagnin, G
Panvini, RS
Banerjee, S
Brown, CM
Fortin, D
Jackson, PD
Kowalewski, R
Roney, JM
Band, HR
Dasu, S
Datta, M
Eichenbaum, AM
Johnson, JR
Kutter, PE
Li, H
Liu, R
Lodovico, FD
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Sekula, SJ
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Neal, H
CA BABAR Collaboration
TI Search for the rare leptonic decay B+->mu(+)nu(mu)
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID LIMIT
AB We have performed a search for the rare leptonic decay B+-->mu(+)nu(mu) with data collected at the Y(4S) resonance by the BABAR experiment at the PEP-II storage ring. In a sample of 88.4x10(6) B (B) over bar pairs, we find no significant evidence for a signal and set an upper limit on the branching fraction B(B+-->mu(+)nu(mu))<6.6x10(-6) at the 90% confidence level.
C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France.
Univ Bari, Dipartmento Fis, I-70126 Bari, Italy.
Univ Bari, Ist Nazl Fis Nucl, I-70126 Bari, Italy.
Inst High Energy Phys, Beijing 100039, Peoples R China.
Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany.
Univ Bristol, Bristol BS8 1TL, Avon, England.
Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
Brunel Univ, Uxbridge UB8 3PH, Middx, England.
Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
Univ Calif Irvine, Irvine, CA 92697 USA.
Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
Univ Calif Riverside, Riverside, CA 92521 USA.
Univ Calif San Diego, La Jolla, CA 92093 USA.
Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA.
CALTECH, Pasadena, CA 91125 USA.
Univ Colorado, Boulder, CO 80309 USA.
Colorado State Univ, Ft Collins, CO 80523 USA.
Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
Ecole Polytech, LLR, F-91128 Palaiseau, France.
Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy.
Univ Ferrara, Ist Nazl Fis Nucl, I-44100 Ferrara, Italy.
Florida A&M Univ, Tallahassee, FL 32307 USA.
Ist Nazl Fis Nucl, Nazl Frascati Lab, I-00044 Frascati, Italy.
Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy.
Univ Genoa, Ist Nazl Fis Nucl, I-16146 Genoa, Italy.
Harvard Univ, Cambridge, MA 02138 USA.
Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany.
Univ London Imperial Coll Sci Technol & Med, London SW7 2BW, England.
Univ Iowa, Iowa City, IA 52242 USA.
Lab Accelerateur Lineaire, F-91898 Orsay, France.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Univ Liverpool, Liverpool L69 3BX, Merseyside, England.
Univ London, London E1 4NS, England.
Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England.
Univ Louisville, Louisville, KY 40292 USA.
Univ Manchester, Manchester M13 9PL, Lancs, England.
Univ Maryland, College Pk, MD 20742 USA.
Univ Massachusetts, Amherst, MA 01003 USA.
MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
McGill Univ, Montreal, PQ H3A 2T8, Canada.
Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
Univ Milan, Ist Nazl Fis Nucl, I-20133 Milan, Italy.
Univ Mississippi, University, MS 38677 USA.
Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada.
Mt Holyoke Coll, S Hadley, MA 01075 USA.
Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy.
Univ Naples Federico II, Ist Nazl Fis Nucl, I-80126 Naples, Italy.
NIKHEF, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands.
Univ Notre Dame, Notre Dame, IN 46556 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
Ohio State Univ, Columbus, OH 43210 USA.
Univ Oregon, Eugene, OR 97403 USA.
Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
Univ Padua, Ist Nazl Fis Nucl, I-35131 Padua, Italy.
Univ Paris 06, Lab Phys Nucl HE, F-75252 Paris, France.
Univ Paris 07, Lab Phys Nucl HE, F-75252 Paris, France.
Univ Pavia, Dipartimento Elettr, I-27100 Pavia, Italy.
Univ Pavia, Ist Nazl Fis Nucl, I-27100 Pavia, Italy.
Univ Penn, Philadelphia, PA 19104 USA.
Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
Univ Perugia, Ist Nazl Fis Nucl, I-06100 Perugia, Italy.
Univ Pisa, Dipartimento Fis, Scuola Normale Super, I-56127 Pisa, Italy.
Univ Pisa, Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
Prairie View A&M Univ, Prairie View, TX 77446 USA.
Princeton Univ, Princeton, NJ 08544 USA.
Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
Univ Roma La Sapienza, Ist Nazl Fis Nucl, I-00185 Rome, Italy.
Univ Rostock, D-18051 Rostock, Germany.
Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France.
Univ S Carolina, Columbia, SC 29208 USA.
Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
Stanford Univ, Stanford, CA 94305 USA.
SUNY Albany, Albany, NY 12222 USA.
Univ Tennessee, Knoxville, TN 37996 USA.
Univ Texas, Austin, TX 78712 USA.
Univ Texas, Richardson, TX 75083 USA.
Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
Univ Turin, Ist Nazl Fis Nucl, I-10125 Turin, Italy.
Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy.
Univ Trieste, Ist Nazl Fis Nucl, I-34127 Trieste, Italy.
Vanderbilt Univ, Nashville, TN 37235 USA.
Univ Victoria, Victoria, BC V8W 3P6, Canada.
Univ Wisconsin, Madison, WI 53706 USA.
Yale Univ, New Haven, CT 06511 USA.
Univ Basilicata, I-85100 Potenza, Italy.
Univ Valencia, IFIC, Inst Fis Corpuscular, CSIC, Valencia, Spain.
Univ Cincinnati, Cincinnati, OH 45221 USA.
Univ Iowa, Iowa City, IA 52242 USA.
RP Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France.
RI Lusiani, Alberto/A-3329-2016; Morandin, Mauro/A-3308-2016; Della Ricca,
Giuseppe/B-6826-2013; Kolomensky, Yury/I-3510-2015; Lusiani,
Alberto/N-2976-2015; Roe, Natalie/A-8798-2012; crosetti,
nanni/H-3040-2011; Martinez Vidal, F*/L-7563-2014; Cavallo,
Nicola/F-8913-2012; Di Lodovico, Francesca/L-9109-2016; Calcaterra,
Alessandro/P-5260-2015; Saeed, Mohammad Alam/J-7455-2012; Negrini,
Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Luppi,
Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese,
Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Lo Vetere,
Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Peters,
Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Lista,
Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; Neri, Nicola/G-3991-2012;
Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani,
Claudia/C-5223-2009; de Sangro, Riccardo/J-2901-2012; M,
Saleem/B-9137-2013; Sarti, Alessio/I-2833-2012; Frey,
Raymond/E-2830-2016
OI Lusiani, Alberto/0000-0002-6876-3288; Morandin,
Mauro/0000-0003-4708-4240; Della Ricca, Giuseppe/0000-0003-2831-6982;
Kolomensky, Yury/0000-0001-8496-9975; Lusiani,
Alberto/0000-0002-6876-3288; Martinez Vidal, F*/0000-0001-6841-6035; Di
Lodovico, Francesca/0000-0003-3952-2175; Calcaterra,
Alessandro/0000-0003-2670-4826; Saeed, Mohammad
Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963; Monge,
Maria Roberta/0000-0003-1633-3195; Luppi, Eleonora/0000-0002-1072-5633;
Calabrese, Roberto/0000-0002-1354-5400; Mir,
Lluisa-Maria/0000-0002-4276-715X; Lo Vetere,
Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304;
Peters, Klaus/0000-0001-7133-0662; Bellini, Fabio/0000-0002-2936-660X;
Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965;
Rotondo, Marcello/0000-0001-5704-6163; Patrignani,
Claudia/0000-0002-5882-1747; de Sangro, Riccardo/0000-0002-3808-5455;
Sarti, Alessio/0000-0001-5419-7951; Frey, Raymond/0000-0003-0341-2636
NR 11
TC 7
Z9 7
U1 0
U2 3
PU AMERICAN 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 JUN 4
PY 2004
VL 92
IS 22
AR 221803
DI 10.1103/PhysRevLett.92.221803
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 826QU
UT WOS:000221844400013
PM 15245213
ER
PT J
AU Guillemin, R
Hemmers, O
Rolles, D
Yu, SW
Wolska, A
Tran, I
Hudson, A
Baker, J
Lindle, DW
AF Guillemin, R
Hemmers, O
Rolles, D
Yu, SW
Wolska, A
Tran, I
Hudson, A
Baker, J
Lindle, DW
TI Nearest-neighbor-atom core-hole transfer in isolated molecules
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ANGULAR-DISTRIBUTION; RESONANT PHOTOEMISSION; PHOTOELECTRONS;
DISTRIBUTIONS; N2O
AB A new phenomenon sensitive only to next-door-neighbor atoms in isolated molecules is demonstrated using angle-resolved photoemission of site-selective core electrons. Evidence for this interatomic core-to-core electron interaction is observable only by measuring nondipolar angular distributions of photoelectrons. In essence, the phenomenon acts as a very fine atomic-scale sensor of nearest-neighbor elemental identity.
C1 Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA.
Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
Max Planck Gesell, Fritz Haber Inst, D-1000 Berlin, Germany.
RP Guillemin, R (reprint author), Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA.
RI Rolles, Daniel/C-2384-2008; Wolska, Anna/A-5818-2012; Tran,
Ich/C-9869-2014
NR 21
TC 8
Z9 8
U1 0
U2 6
PU AMERICAN 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 JUN 4
PY 2004
VL 92
IS 22
AR 223002
DI 10.1103/PhysRevLett.92.223002
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 826QU
UT WOS:000221844400017
PM 15245217
ER
PT J
AU Lany, S
Wolf, H
Wichert, T
AF Lany, S
Wolf, H
Wichert, T
TI Density functional theory calculations establish the experimental
evidence of the DX center atomic structure in CdTe
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID MICROSCOPIC STRUCTURE; LATTICE-RELAXATION; ALXGA1-XAS ALLOYS; DONOR
LEVELS; DEFECTS; FILMS; GAAS
AB The In DX center and the DX-like configuration of the Cd host atom in CdTe are investigated using density functional theory. The simultaneous calculation of the atomic structure and the electric field gradient (EFG) allows one to correlate the theoretically predicted structure of the DX center with an experimental observable, namely, the EFG obtained from radioactive In-111/Cd-111 probe atoms in In doped CdTe. In this way, the experimental identification of the DX center structure is established.
C1 Univ Saarland, D-66041 Saarbrucken, Germany.
RP Lany, S (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
OI Lany, Stephan/0000-0002-8127-8885
NR 22
TC 17
Z9 17
U1 1
U2 3
PU AMERICAN 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 JUN 4
PY 2004
VL 92
IS 22
AR 225504
DI 10.1103/PhysRevLett.92.225504
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 826QU
UT WOS:000221844400036
PM 15245236
ER
PT J
AU Lavrov, AN
Kang, HJ
Kurita, Y
Suzuki, T
Komiya, S
Lynn, JW
Lee, SH
Dai, PC
Ando, Y
AF Lavrov, AN
Kang, HJ
Kurita, Y
Suzuki, T
Komiya, S
Lynn, JW
Lee, SH
Dai, PC
Ando, Y
TI Spin-flop transition and the anisotropic magnetoresistance of
Pr1.3-xLa0.7CexCuO4: Unexpectedly strong spin-charge coupling in the
electron-doped cuprates
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID MAGNETIC-STRUCTURE; STATE; DYNAMICS; PR2CUO4; FIELD; ORDER; PR;
ANTIFERROMAGNETISM; TRANSPORT; LA2CUO4
AB We use transport and neutron-scattering measurements to show that a magnetic-field-induced transition from noncollinear to collinear spin arrangement in adjacent CuO2 planes of lightly electron-doped Pr1.3-xLa0.7CexCuO4 (x=0.01) crystals affects significantly both the in-plane and out-of-plane resistivity. In the high-field collinear state, the magnetoresistance (MR) does not saturate but exhibits an intriguing fourfold-symmetric angular dependence, oscillating from being positive at Bparallel to[100] to being negative at Bparallel to[110]. The observed MR of more than 30% at low temperatures induced by a modest modification of the spin structure indicates an unexpectedly strong spin-charge coupling in electron-doped cuprates.
C1 Cent Res Inst Elect Power Ind, Tokyo 2018511, Japan.
Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA.
Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
Tokyo Univ Sci, Dept Phys, Shinjuku Ku, Tokyo 1628601, Japan.
RP Cent Res Inst Elect Power Ind, Tokyo 2018511, Japan.
EM daip@ornl.gov; ando@criepi.denken.or.jp
RI Dai, Pengcheng /C-9171-2012; Ando, Yoichi/B-8163-2013
OI Dai, Pengcheng /0000-0002-6088-3170; Ando, Yoichi/0000-0002-3553-3355
NR 21
TC 35
Z9 37
U1 1
U2 11
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 JUN 4
PY 2004
VL 92
IS 22
AR 227003
DI 10.1103/PhysRevLett.92.227003
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 826QU
UT WOS:000221844400053
PM 15245253
ER
PT J
AU Steck, DA
Jacobs, K
Mabuchi, H
Bhattacharya, T
Habib, S
AF Steck, DA
Jacobs, K
Mabuchi, H
Bhattacharya, T
Habib, S
TI Quantum feedback control of atomic motion in an optical cavity
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SINGLE PHOTONS; SYSTEMS; FIELD
AB We study quantum feedback cooling of atomic motion in an optical cavity. We design a feedback algorithm that can cool the atom to the ground state of the optical potential with high efficiency despite the nonlinear nature of this problem. An important ingredient is a simplified state-estimation algorithm, necessary for a real-time implementation of the feedback loop. We also describe the critical role of parity dynamics in the cooling process and present a simple theory that predicts the achievable steady-state atomic energies.
C1 Los Alamos Natl Lab, Theoret Div T8, Los Alamos, NM 87545 USA.
Griffith Univ, Sch Sci, Ctr Quantum Dynam, Ctr Quantum Comp Technol, Nathan, Qld 4111, Australia.
CALTECH, Norman Bridge Lab Phys 12 33, Pasadena, CA 91125 USA.
RP Steck, DA (reprint author), Los Alamos Natl Lab, Theoret Div T8, MS B285, Los Alamos, NM 87545 USA.
RI Jacobs, Kurt/E-7049-2011; Bhattacharya, Tanmoy/J-8956-2013
OI Jacobs, Kurt/0000-0003-0828-6421; Bhattacharya,
Tanmoy/0000-0002-1060-652X
NR 22
TC 65
Z9 68
U1 0
U2 9
PU AMERICAN 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 JUN 4
PY 2004
VL 92
IS 22
AR 223004
DI 10.1103/PhysRevLett.92.223004
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 826QU
UT WOS:000221844400019
PM 15245219
ER
PT J
AU Xiao, ZL
Dogru, O
Andrei, EY
Shuk, P
Greenblatt, M
AF Xiao, ZL
Dogru, O
Andrei, EY
Shuk, P
Greenblatt, M
TI Observation of the vortex lattice spinodal in NbSe2
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID FLUX-LINE-LATTICE; DYNAMIC INSTABILITIES; INDUCED ORGANIZATION;
SINGLE-CRYSTAL; PEAK; SUPERCONDUCTORS; YBA2CU3O7-DELTA; MOTION; FIELD;
BI2SR2CACU2O8
AB Metastable superheated and supercooled vortex states in NbSe2 crystals were probed with fast transport measurements over a wide range of field and temperature. The limit of metastability of the superheated vortex lattice defines a line in the phase diagram that lies below the superconducting transition and is clearly separated from it. This line is identified as the vortex lattice spinodal, and is in good agreement with recent theoretical predictions by Li and Rosenstein [Phys. Rev. B 65, 220504 (2002); cond-mat/0305258]. By contrast, no limit of metastability is observed for the supercooled disordered state.
C1 Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08855 USA.
Rutgers State Univ, Dept Chem, Piscataway, NJ 08855 USA.
Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
Rosemount Analyt Inc, Emerson Proc Management, Orrville, OH 44667 USA.
RP Xiao, ZL (reprint author), Rutgers State Univ, Dept Phys & Astron, POB 849, Piscataway, NJ 08855 USA.
NR 33
TC 41
Z9 41
U1 1
U2 8
PU AMERICAN 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 JUN 4
PY 2004
VL 92
IS 22
AR 227004
DI 10.1103/PhysRevLett.92.227004
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 826QU
UT WOS:000221844400054
PM 15245254
ER
PT J
AU Zholents, AA
Fawley, WM
AF Zholents, AA
Fawley, WM
TI Proposal for intense attosecond radiation from an x-ray free-electron
laser
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID GENERATION; FIELDS; PULSES
AB We propose the use of an ultrarelativistic electron beam interacting with a few-cycle, intense laser pulse and an intense pulse of the coherent x rays to produce a multi-MW intensity, x-ray pulses approximate to100 attoseconds in duration. Because of a naturally occurring frequency chirp, these pulses can be further temporally compressed.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Zholents, AA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
OI Fawley, William/0000-0002-4736-8705
NR 17
TC 120
Z9 123
U1 2
U2 9
PU AMERICAN 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 JUN 4
PY 2004
VL 92
IS 22
AR 224801
DI 10.1103/PhysRevLett.92.224801
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 826QU
UT WOS:000221844400029
PM 15245229
ER
PT J
AU Blake, NJ
Streets, DG
Woo, JH
Simpson, IJ
Green, J
Meinardi, S
Kita, K
Atlas, E
Fuelberg, HE
Sachse, G
Avery, MA
Vay, SA
Talbot, RW
Dibb, JE
Bandy, AR
Thornton, DC
Rowland, FS
Blake, DR
AF Blake, NJ
Streets, DG
Woo, JH
Simpson, IJ
Green, J
Meinardi, S
Kita, K
Atlas, E
Fuelberg, HE
Sachse, G
Avery, MA
Vay, SA
Talbot, RW
Dibb, JE
Bandy, AR
Thornton, DC
Rowland, FS
Blake, DR
TI Carbonyl sulfide and carbon disulfide: Large-scale distributions over
the western Pacific and emissions from Asia during TRACE-P
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
DE carbonyl sulfide (OCS); carbon disulfide (CS2); Asian emissions;
emission inventories
ID DIMETHYL SULFIDE; AIRCRAFT OBSERVATIONS; CHEMICAL EVOLUTION; TRANSPORT
PATHWAYS; GLOBAL SOURCES; SOUTH-PACIFIC; SULFUR CYCLE; BIOMASS;
ATMOSPHERE; OUTFLOW
AB An extensive set of carbonyl sulfide (OCS) and carbon disulfide (CS2) observations were made as part of the NASA Transport and Chemical Evolution over the Pacific (TRACE-P) project, which took place in the early spring 2001. TRACE-P sampling focused on the western Pacific region but in total included the geographic region 110degreesE to 290degreesE longitude, 5degreesN to 50degreesN latitude, and 0-12 km altitude. Substantial OCS and CS2 enhancements were observed for a great many air masses of Chinese and Japanese origin during TRACE-P. Over the western Pacific, mean mixing ratios of long-lived OCS and shorter-lived CS2 showed a gradual decrease by about 10% and a factor of 5-10, respectively, from the surface to 8-10 km altitude, presumably because land-based sources dominated their distribution during February through April 2001. The highest mean OCS and CS2 levels (580 and 20 pptv, respectively, based on 2.5degrees x 2.5degrees latitude bins) were observed below 2 km near the coast of Asia, at latitudes between 25degreesN and 35degreesN, where urban Asian outflow was strongest. Ratios of OCS versus CO for continental SE Asia were much lower compared to Chinese and Japanese signatures and were strongly associated with biomass burning/biofuel emissions. We present a new inventory of anthropogenic Asian emissions ( including biomass burning) for OCS and CS2 and compare it to emission estimates based on regional relationships of OCS and CS2 to CO and CO2. The OCS and CS2 results for the two methods compare well for continental SE Asia and Japan plus Korea and also for Chinese CS2 emissions. However, it appears that the inventory underestimates Chinese emissions of OCS by about 30-100%. This difference may be related to the fact that we did not include natural sources such as wetland emissions in our inventory, although the contributions from such sources are believed to be at a seasonal low during the study period. Uncertainties in OCS emissions from Chinese coal burning, which are poorly characterized, likely contribute to the discrepancy.
C1 Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA.
Argonne Natl Lab, Argonne, IL 60439 USA.
Univ Iowa, Iowa Adv Technol Labs, Ctr Global & Reg Environm Res, Iowa City, IA 52242 USA.
Ibaraki Univ, Fac Sci, Dept Environm Sci, Mito, Ibaraki 3108512, Japan.
Natl Ctr Atmospher Res, Boulder, CO 80307 USA.
Florida State Univ, Dept Meteorol, Tallahassee, FL 32306 USA.
NASA, Langley Res Ctr, Hampton, VA 23681 USA.
Univ New Hampshire, Climate Change Res Ctr, Inst Study Earth Oceans & Space, Durham, NH 03824 USA.
Drexel Univ, Dept Chem, Philadelphia, PA 19104 USA.
RP Univ Calif Irvine, Dept Chem, 516 Rowland Hall, Irvine, CA 92697 USA.
EM nblake@uci.edu; dstreets@anl.gov; woojh21@cgrer.uiowa.edu;
isimpson@uci.edu; jegreen@caltech.edu; smeinard@uci.edu;
kita@mx.ibaraki.ac.jp; atlas@ucar.edu; fuelberg@huey.met.fsu.edu;
g.w.sachse@larc.nasa.gov; m.a.avery@larc.nasa.gov;
s.a.vay@larc.nasa.gov; robert.talbot@unh.edu; jack.dibb@unh.edu;
bandyar@drexel.edu; dct@drexel.edu; rowland@uci.edu; drblake@uci.edu
RI Atlas, Elliot/J-8171-2015;
OI Streets, David/0000-0002-0223-1350
NR 50
TC 29
Z9 29
U1 2
U2 12
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 JUN 3
PY 2004
VL 109
IS D15
AR D15S05
DI 10.1029/2003JD004259
PG 15
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 828DT
UT WOS:000221954000003
ER
PT J
AU Ma, Y
Weber, RJ
Maxwell-Meier, K
Orsini, DA
Lee, YN
Huebert, BJ
Howell, SG
Bertram, T
Talbot, RW
Dibb, JE
Scheuer, E
AF Ma, Y
Weber, RJ
Maxwell-Meier, K
Orsini, DA
Lee, YN
Huebert, BJ
Howell, SG
Bertram, T
Talbot, RW
Dibb, JE
Scheuer, E
TI Intercomparisons of airborne measurements of aerosol ionic chemical
composition during TRACE-P and ACE-Asia
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
DE airborne aerosol; chemical composition; intercomparison
ID PACIFIC; SULFATE; DISTRIBUTIONS; NITRATE; ANIONS; FILTER
AB As part of the two field studies, Transport and Chemical Evolution over the Pacific (TRACE-P) and the Asian Aerosol Characterization Experiment (ACE-Asia), the inorganic chemical composition of tropospheric aerosols was measured over the western Pacific from three separate aircraft using various methods. Comparisons are made between the rapid online techniques of the particle into liquid sampler (PILS) for measurement of a suite of fine particle a mist chamber/ion chromatograph (MC/IC) measurement of fine sulfate, and the longer time-integrated filter and micro-orifice impactor (MOI) measurements. Comparisons between identical PILS on two separate aircraft flying in formation showed that they were highly correlated (e.g., sulfate r(2) of 0.95), but were systematically different by 10 +/- 5% (linear regression slope and 95% confidence bounds), and had generally higher concentrations on the aircraft with a low-turbulence inlet and shorter inlet-to-instrument transmission tubing. Comparisons of PILS and mist chamber measurements of fine sulfate on two different aircraft during formation flying had an r(2) of 0.78 and a relative difference of 39% +/- 5%. MOI ionic data integrated to the PILS upper measurement size of 1.3 mum sampling from separate inlets on the same aircraft showed that for sulfate, PILS and MOI were within 14% +/- 6% and correlated with an r(2) of 0.87. Most ionic compounds were within +/-30%, which is in the range of differences reported between PILS and integrated samplers from ground-based comparisons. In many cases, direct intercomparison between the various instruments is difficult due to differences in upper-size detection limits. However, for this study, the results suggest that the fine particle mass composition measured from aircraft agree to within 30-40%.
C1 Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA.
Brookhaven Natl Lab, Dept Environm Sci, Upton, NY 11973 USA.
Univ Hawaii Manoa, Dept Oceanog, Honolulu, HI 96822 USA.
Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA.
RP Ma, Y (reprint author), Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA.
EM yma@eas.gatech.edu
NR 21
TC 14
Z9 15
U1 0
U2 3
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 JUN 3
PY 2004
VL 109
IS D15
AR D15S06
DI 10.1029/2003JD003673
PG 13
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 828DT
UT WOS:000221954000001
ER
PT J
AU Wang, GT
Creighton, JR
AF Wang, GT
Creighton, JR
TI Complex formation between magnesocene (MgCp2) and NH3: Implications for
p-type doping of group III nitrides and the Mg memory effect
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID CHEMICAL-VAPOR-DEPOSITION; GAN; METALLOCENES; DENSITY
AB Magnesocene (biscyclopentadienylmagnesium) is a common precursor used for the p-type doping of GaN and other group III nitride materials. Unfortunately, difficulties remain with predictably controlling the incorporation of Mg during metal organic chemical vapor deposition (MOCVD) film growth, which often exhibits poorly understood "memory effects." Although the formation of a reaction product between magnesocene and ammonia has been previously speculated, one has never been experimentally isolated or identified. We have spectroscopically observed and identified, for the first time, the adducts formed between magnesocene and ammonia. Density functional theory (DFT) quantum chemistry calculations have also been performed on the system to determine the structures and energetics of the reaction products. It was found that ammonia can form condensable Lewis acid-base complexes with magnesocene in both 1:1 and 2:1 ratios (i.e., NH3-MgCp2 and (NH3)(2)-MgCp2) via nucleophilic attack of NH3 at the positively charged Mg center of MgCp2. Adduct formation is reversible, and the 1:1 and 2:1 products can be converted to one another by controlling the NH3 partial pressure. The formation and condensation of both adducts at room temperature is the probable parasitic source that leads to many of the observed Mg incorporation difficulties during the p-type doping of group III nitride materials.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Wang, GT (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM gtwang@sandia.gov
RI Wang, George/C-9401-2009
OI Wang, George/0000-0001-9007-0173
NR 11
TC 9
Z9 9
U1 3
U2 20
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 JUN 3
PY 2004
VL 108
IS 22
BP 4873
EP 4877
DI 10.1021/jp036494e
PG 5
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 824QC
UT WOS:000221700100008
ER
PT J
AU Thomas, TD
Saethre, LJ
Borve, KJ
Bozek, JD
Huttula, M
Kukk, E
AF Thomas, TD
Saethre, LJ
Borve, KJ
Bozek, JD
Huttula, M
Kukk, E
TI Carbon 1s photoelectron spectroscopy of halomethanes. Effects of
electronegativity, hardness, charge distribution, and relaxation
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID ELECTRON-BINDING-ENERGIES; CORE-IONIZATION ENERGIES; BASIS-SETS; ATOMS;
EQUALIZATION; POTENTIALS; MOLECULES; ELEMENTS; SPECTRUM; AVERAGE
AB Carbon 1s ionization energies have been measured for 12 halomethanes. These together with earlier measurements provide 27 compounds for investigating the relationship between core-ionization energies and the electronegativity and hardness of the halogens. The ionization energies correlate nearly linearly with the sum of the electronegativities of the halogens attached to the central carbon. Both electronegativity and hardness play important roles in determining the ionization energy, and it is found that the linear relationship between ionization energy and electronegativity arises from an interplay of the electronegativity and hardness of the halogens and the length and ionicity of the carbon-halogen bond.
C1 Oregon State Univ, Dept Chem, Corvallis, OR 97331 USA.
Univ Bergen, Dept Chem, NO-5007 Bergen, Norway.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
Oulu Univ, Dept Phys Sci, FIN-90014 Oulu, Finland.
RP Oregon State Univ, Dept Chem, Gilbert Hall 153, Corvallis, OR 97331 USA.
EM darrah.thomas@orst.edu; leif.saethre@kj.uib.no; knut.borve@kj.uib.no
RI Bozek, John/E-4689-2010; Borve, Knut/I-5934-2012; Bozek,
John/E-9260-2010
OI Borve, Knut/0000-0002-5782-8963; Bozek, John/0000-0001-7486-7238
NR 38
TC 19
Z9 20
U1 0
U2 4
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 JUN 3
PY 2004
VL 108
IS 22
BP 4983
EP 4990
DI 10.1021/jp049510w
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 824QC
UT WOS:000221700100023
ER
PT J
AU Haranczyk, M
Dabkowska, I
Rak, J
Gutowski, M
Nilles, JM
Stokes, S
Radisic, D
Bowen, KH
AF Haranczyk, M
Dabkowska, I
Rak, J
Gutowski, M
Nilles, JM
Stokes, S
Radisic, D
Bowen, KH
TI Excess electron attachment induces barrier-free proton transfer in
anionic complexes of thymine and uracil with formic acid
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Letter
ID DENSITY; DNA; EXCHANGE; GLYCINE; IONS
AB The anionic complexes of formic acid with uracil and thymine reveal broad features in photoelectron spectroscopy (PES) experiments with maxima at 1.7 and 1.1 eV, respectively. The results of quantum chemical calculations suggest that electron vertical detachment energies (VDE) of 1.6-1.9 eV correspond to anionic structures in which a proton has been transferred from the carboxylic group of the formic acid to the 08 atom of uracil or thymine. Smaller values of VDE (0.8 to 1.3 eV) correspond to chemically untransformed complexes, in which anionic uracil or thymine interacts through two hydrogen bonds with the carboxylic group of the intact formic acid. The recorded spectra and the results of quantum chemical calculations suggest that both nucleic acid bases undergo barrier-free proton transfer in anionic complexes with formic acid. The difference in experimental spectra of UF- and TF- provides an indication that the methyl group of thymine could make a difference in the intermolecular proton transfer.
C1 Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA.
Univ Gdansk, Inst Chem, PL-80952 Gdansk, Poland.
Johns Hopkins Univ, Dept Chem, Baltimore, MD 21218 USA.
RP Gutowski, M (reprint author), Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA.
RI Haranczyk, Maciej/A-6380-2014
OI Haranczyk, Maciej/0000-0001-7146-9568
NR 16
TC 38
Z9 38
U1 0
U2 1
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 JUN 3
PY 2004
VL 108
IS 22
BP 6919
EP 6921
DI 10.1021/jp0379143
PG 3
WC Chemistry, Physical
SC Chemistry
GA 824QE
UT WOS:000221700300005
ER
PT J
AU Belot, JA
Clark, J
Cowan, JA
Harbison, GS
Kolesnikov, AI
Kye, YS
Schultz, AJ
Silvernail, C
Zhao, XG
AF Belot, JA
Clark, J
Cowan, JA
Harbison, GS
Kolesnikov, AI
Kye, YS
Schultz, AJ
Silvernail, C
Zhao, XG
TI The shortest symmetrical O-H center dot center dot center dot O hydrogen
bond has a low-barrier double-well potential
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Letter
ID NEUTRON-DIFFRACTION; CRYSTAL-STRUCTURE; MOLECULES; NMR; ENOL
AB The strong hydrogen bond, in which a hydrogen atom is centered between two electronegative atoms in a single minimum potential has been widely discussed but rarely definitively observed. The compound 4-cyano-2,2,6,6-tetramethy 1- 3,5-heptanedione has the shortest symmetrical O-H...O hydrogen bond yet reported, at 239.3 pm. Neutron crystallography reveals the hydrogen-bonded proton to be nearly centered between the two oxygens, with a highly elongated thermal ellipsoid. Inelastic neutron scattering measurements of the normal and isotope labeled molecule reveal a hydrogen-bond vibrational frequency at 46.0 meV (371 cm(-1)). This frequency is too low to be compatible with a single-minimum potential and indicates a low-barrier double minimum. The temperature dependence of the NMR properties confirms the existence of a thermally accessible vibrationally excited state for the bond. Because other short hydrogen bonds show similar NMR behavior, it is likely that no "strong" hydrogen bond of this sort has yet been discovered.
C1 Univ Nebraska, Dept Chem, Lincoln, NE 68588 USA.
Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA.
RP Harbison, GS (reprint author), Univ Nebraska, Dept Chem, Lincoln, NE 68588 USA.
EM gerry@setanta.unl.edu
RI Kolesnikov, Alexander/I-9015-2012
OI Kolesnikov, Alexander/0000-0003-1940-4649
NR 23
TC 31
Z9 32
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 JUN 3
PY 2004
VL 108
IS 22
BP 6922
EP 6926
DI 10.1021/jp0496710
PG 5
WC Chemistry, Physical
SC Chemistry
GA 824QE
UT WOS:000221700300006
ER
PT J
AU Deb, A
Bergmann, U
Cairns, EJ
Cramer, SP
AF Deb, A
Bergmann, U
Cairns, EJ
Cramer, SP
TI Structural investigations of LiFePO4 electrodes by Fe X-ray absorption
spectroscopy
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID RECHARGEABLE LITHIUM BATTERIES; XANES SPECTROSCOPY; CATHODE MATERIALS;
IRON; COORDINATION; EDGE; MN; INFORMATION; PHOSPHATES; INSERTION
AB Fe K-edge X-ray absorption near-edge spectroscopy (XANES) and extended X-ray absorption fine structure (EXAFS) have been performed on LiFePO4, and on electrodes containing this material to determine the local atomic and electronic structure and their stability with electrochemical cycling (repeated charging and discharging). Comparison of the XANES data for the powder sample, uncycled electrode, and cycled electrodes 7SG and 9SG reveals that the Fe ions are octahedrally coordinated and in the Fe2+ state. Even after repeated charging and discharging, the structure of the LiFePO4 cycled electrodes (7SG, cycled 64 times, and 9SG, cycled 21 times) did not change and hence the material possesses very desirable characteristics for an electrode. This makes it an excellent choice for long cycle life Li-ion battery applications.
C1 Ernest Orlando Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA.
RP Deb, A (reprint author), Ernest Orlando Lawrence Berkeley Natl Lab, Environm Energy Technol Div, 1 Cyclotron Rd,MS 70-108B, Berkeley, CA 94720 USA.
EM ADeb@lbl.gov
RI Deb, Aniruddha/H-7529-2016; Cairns, Elton/E-8873-2012
OI Deb, Aniruddha/0000-0002-0331-9709; Cairns, Elton/0000-0002-1179-7591
NR 35
TC 39
Z9 42
U1 1
U2 31
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD JUN 3
PY 2004
VL 108
IS 22
BP 7046
EP 7049
DI 10.1021/jp036361t
PG 4
WC Chemistry, Physical
SC Chemistry
GA 824QE
UT WOS:000221700300025
ER
PT J
AU McKnight, TE
Melechko, AV
Austin, DW
Sims, T
Guillorn, MA
Simpson, ML
AF McKnight, TE
Melechko, AV
Austin, DW
Sims, T
Guillorn, MA
Simpson, ML
TI Microarrays of vertically-aligned carbon nanofiber electrodes in an open
fluidic channel
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID SCANNING ELECTROCHEMICAL MICROSCOPY; LOW IONIC-STRENGTH; VOLTAMMETRY;
ARRAYS; CELLS; MICROELECTRODES; NANOSTRUCTURES; NANOTUBES; CATHODES;
KINETICS
AB Fabrication and electrochemical characterization of microarrays of individually addressable vertically aligned carbon nanofiber electrodes contained within an open fluidic channel are described. Compatibility of the deterministic synthesis of vertically aligned nanofibers with conventional microfabrication techniques enables the development of relatively complex, functional multilevel devices that may be produced efficiently in large numbers. The vertical orientation of nanofibers provides a basis for small volume electroanalyses in probing regions elevated above the planar substrate, which can enable applications including electroanalysis within and around live cell matrixes, high aspect ratio probing structures for scanning electrochemical microscopy, and channel-resident electrodes with high capture efficiency for electrochemical detection of microfluidic chemical separations.
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37996 USA.
Univ Tennessee, Knoxville, TN 37996 USA.
RP McKnight, TE (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37996 USA.
EM mcknightte@ornl.gov
RI Melechko, Anatoli/B-8820-2008; Simpson, Michael/A-8410-2011; McKnight,
Tim/H-3087-2011
OI Simpson, Michael/0000-0002-3933-3457; McKnight, Tim/0000-0003-4326-9117
NR 33
TC 39
Z9 40
U1 2
U2 16
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 JUN 3
PY 2004
VL 108
IS 22
BP 7115
EP 7125
DI 10.1021/jp037987m
PG 11
WC Chemistry, Physical
SC Chemistry
GA 824QE
UT WOS:000221700300033
ER
PT J
AU Teske, CA
Blanch, HW
Prausnitz, JN
AF Teske, CA
Blanch, HW
Prausnitz, JN
TI Measurement of lysozyme-lysozyme interactions with quantitative affinity
chromatography
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID SELF-INTERACTION CHROMATOGRAPHY; PROTEIN-PROTEIN INTERACTIONS; PORE-SIZE
DISTRIBUTIONS; ELECTROLYTE-SOLUTIONS; FIBRILLOGENESIS; INHIBITION;
ADSORPTION; PARTICLES; DISEASE
AB A chromatographic method is used to measure lysozyme-lysozyme interactions in aqueous salt solutions as a function of solution conditions (pH, ionic strength, and salt type). Compared to static light scattering and membrane osmometry, the chromatographic method requires significantly less protein. To interpret retention-time data, it is necessary to account for multibody interactions between a mobile lysozyme molecule and immobilized lysozyme molecules on the support surface. The interaction between lysozyme molecules may be described by a potential of mean force that contains hard-sphere, electrostatic, and square-well contributions. Square-well depths from chromatographic data are in semiquantitative agreement with those from osmotic second virial coefficients from static light scattering measurements.
C1 Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Prausnitz, JN (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
EM prausnit@cchem.berkeley.edu
RI Teske, Christopher/B-5974-2008
NR 29
TC 24
Z9 26
U1 0
U2 4
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 JUN 3
PY 2004
VL 108
IS 22
BP 7437
EP 7444
DI 10.1021/jp0361576
PG 8
WC Chemistry, Physical
SC Chemistry
GA 824QE
UT WOS:000221700300073
ER
PT J
AU Hayden, SM
Mook, HA
Dai, PC
Perring, TG
Dogan, F
AF Hayden, SM
Mook, HA
Dai, PC
Perring, TG
Dogan, F
TI The structure of the high-energy spin excitations in a
high-transition-temperature superconductor
SO NATURE
LA English
DT Article
ID NEUTRON-SCATTERING; FLUCTUATIONS; YBA2CU3O6+X; MECHANISM; SPECTRUM
AB In conventional superconductors, lattice vibrations (phonons) mediate the attraction between electrons that is responsible for superconductivity(1). The high transition temperatures (high-T-c) of the copper oxide superconductors has led to collective spin excitations being proposed as the mediating excitations in these materials(2). The mediating excitations must be strongly coupled to the conduction electrons, have energy greater than the pairing energy, and be present at T-c. The most obvious feature in the magnetic excitations of high-T-c superconductors such as YBa2Cu3O6+x is the so-called 'resonance'(3-6). Although the resonance may be strongly coupled to the superconductivity(3-8), it is unlikely to be the main cause, because it has not been found in the La2-x(Ba,Sr)(x)CuO4 family and is not universally present in Bi2Sr2CaCu2O8+delta (ref. 9). Here we use inelastic neutron scattering to characterize possible mediating excitations at higher energies in YBa2Cu3O6.6. We observe a square-shaped continuum of excitations peaked at incommensurate positions. These excitations have energies greater than the superconducting pairing energy, are present at T-c, and have spectral weight far exceeding that of the 'resonance'. The discovery of similar excitations in La2-xBaxCuO4 (ref. 10) suggests that they are a general property of the copper oxides, and a candidate for mediating the electron pairing.
C1 Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England.
Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA.
Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
Univ Missouri, Dept Ceram Engn, Rolla, MO 65409 USA.
RP Hayden, SM (reprint author), Univ Bristol, HH Wills Phys Lab, Tyndall Ave, Bristol BS8 1TL, Avon, England.
EM S.Hayden@bristol.ac.uk
RI Hayden, Stephen/F-4162-2011; Dai, Pengcheng /C-9171-2012
OI Hayden, Stephen/0000-0002-3209-027X; Dai, Pengcheng /0000-0002-6088-3170
NR 26
TC 285
Z9 287
U1 3
U2 31
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
J9 NATURE
JI Nature
PD JUN 3
PY 2004
VL 429
IS 6991
BP 531
EP 534
DI 10.1038/nature02576
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 825OL
UT WOS:000221767700031
PM 15175744
ER
PT J
AU Tranquada, JM
Woo, H
Perring, TG
Goka, H
Gu, GD
Xu, G
Fujita, M
Yamada, K
AF Tranquada, JM
Woo, H
Perring, TG
Goka, H
Gu, GD
Xu, G
Fujita, M
Yamada, K
TI Quantum magnetic excitations from stripes in copper oxide
superconductors
SO NATURE
LA English
DT Article
ID HIGH-TEMPERATURE SUPERCONDUCTORS; SPIN; FLUCTUATIONS; LADDER;
LA2-XSRXCUO4; YBA2CU3O6.6; SPECTRUM; WAVES
AB In the copper oxide parent compounds of the high-transition-temperature superconductors(1) the valence electrons are localized-one per copper site-by strong intra-atomic Coulomb repulsion. A symptom of this localization is antiferromagnetism(2), where the spins of localized electrons alternate between up and down. Superconductivity appears when mobile 'holes' are doped into this insulating state, and it coexists with antiferromagnetic fluctuations(3). In one approach to describing the coexistence, the holes are believed to self-organize into 'stripes' that alternate with antiferromagnetic (insulating) regions within copper oxide planes(4), which would necessitate an unconventional mechanism of superconductivity(5). There is an apparent problem with this picture, however: measurements of magnetic excitations in superconducting YBa2Cu3O6+x near optimum doping(6) are incompatible with the naive expectations(7,8) for a material with stripes. Here we report neutron scattering measurements on stripe-ordered La1.875Ba0.125CuO4. We show that the measured excitations are, surprisingly, quite similar to those in YBa2Cu3O6+x (refs 9, 10) ( that is, the predicted spectrum of magnetic excitations(7,8) is wrong). We find instead that the observed spectrum can be understood within a stripe model by taking account of quantum excitations. Our results support the concept that stripe correlations are essential to high-transition-temperature superconductivity(11).
C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan.
RP Tranquada, JM (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
EM jtran@bnl.gov
RI Tranquada, John/A-9832-2009; Yamada, Kazuyoshi/C-2728-2009; Xu,
Guangyong/A-8707-2010; Fujita, Masaki/D-8430-2013
OI Tranquada, John/0000-0003-4984-8857; Xu, Guangyong/0000-0003-1441-8275;
NR 31
TC 403
Z9 404
U1 5
U2 48
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
J9 NATURE
JI Nature
PD JUN 3
PY 2004
VL 429
IS 6991
BP 534
EP 538
DI 10.1038/nature02574
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 825OL
UT WOS:000221767700032
PM 15175745
ER
PT J
AU Caruthers, JM
Adolf, DB
Chambers, RS
Shrikhande, P
AF Caruthers, JM
Adolf, DB
Chambers, RS
Shrikhande, P
TI A thermodynamically consistent, nonlinear viscoelastic approach for
modeling glassy polymers
SO POLYMER
LA English
DT Article
DE yield; viscoelasticity; volume relaxation
ID LINEAR VISCOELASTICITY; AMORPHOUS POLYMERS; STRESS RELAXATION; SOLID
POLYMERS; BEHAVIOR; VOLUME; TEMPERATURE; FINITE; POLYCARBONATE;
DEFORMATION
AB A thermodynamically consistent nonlinear viscoelastic constitutive theory is derived to capture the wide range of behavior observed in glassy polymers, including such phenomena as yield, stress/volume/enthalpy relaxation, nonlinear stress-strain behavior in complex loading histories, and physical aging. The Helmholtz free energy for an isotropic, thermorheologically simple, viscoelastic material is constructed, and quantities such as the stress and entropy are determined from the Helmholtz potential using Rational Mechanics. The constitutive theory employs a generalized strain measure and a material clock, where the rate of relaxation is controlled by the internal energy that is likewise determined consistently from the viscoelastic Helmholtz potential. This is perhaps the simplest model consistent with the basic requirements of continuum physics, where the rate of relaxation depends upon the thermodynamic state of the polymer. The predictions of the model are compared with extensive experimental data in the following companion paper. (C) 2004 Elsevier Ltd. All rights reserved.
C1 Sandia Natl Labs, Mat & Proc Sci Ctr, Albuquerque, NM 87185 USA.
Purdue Univ, Sch Chem Engn, W Lafayette, IN 47907 USA.
Sandia Natl Labs, Engn Sci Ctr, Albuquerque, NM 87185 USA.
RP Adolf, DB (reprint author), Sandia Natl Labs, Mat & Proc Sci Ctr, Albuquerque, NM 87185 USA.
EM caruther@ecn.purdue.edu; dbadolf@sandia.gov; rschamb@sandia.gov
NR 40
TC 103
Z9 103
U1 0
U2 20
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0032-3861
J9 POLYMER
JI Polymer
PD JUN 3
PY 2004
VL 45
IS 13
BP 4577
EP 4597
DI 10.1016/j.polymer.2004.04.021
PG 21
WC Polymer Science
SC Polymer Science
GA 826NU
UT WOS:000221836600026
ER
PT J
AU Adolf, DB
Chambers, RS
Caruthers, JM
AF Adolf, DB
Chambers, RS
Caruthers, JM
TI Extensive validation of a thermodynamically consistent, nonlinear
viscoelastic model for glassy polymers
SO POLYMER
LA English
DT Article
DE epoxy; polycarbonate; yield
AB The nonlinear thermoviscoelastic formalism presented in the preceding paper is validated with four amorphous polymer systems. Validation is performed over a broad range of relaxation phenomena in the glass transition region, including the temperature and rate-dependence of the stress-strain behavior through yield, volume and enthalpy relaxation, and stress relaxation during multi-step loading histories. The objective is to obtain quantitative agreement between the constitutive theory and all experimental results using one set of model parameters for each material system. The nonlinear viscoelastic formalism is shown to predict the wide range of behavior observed experimentally, indicating that the formalism does capture the essential physics of glassy polymers. Moreover, the material parameters required in the constitutive formalism can be readily obtained from independent experiments and are relatively insensitive to how these parameters are determined experimentally from the various characterization techniques. (C) 2004 Elsevier Ltd. All rights reserved.
C1 Sandia Natl Labs, Mat & Proc Sci Ctr, Albuquerque, NM 87185 USA.
Sandia Natl Labs, Engn Sci Ctr, Albuquerque, NM 87185 USA.
Purdue Univ, Sch Chem Engn, W Lafayette, IN 47907 USA.
RP Adolf, DB (reprint author), Sandia Natl Labs, Mat & Proc Sci Ctr, Albuquerque, NM 87185 USA.
EM dbadolf@sandia.gov; rschamb@sandia.gov; caruther@ecn.purdue.edu
NR 4
TC 61
Z9 61
U1 1
U2 10
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0032-3861
J9 POLYMER
JI Polymer
PD JUN 3
PY 2004
VL 45
IS 13
BP 4599
EP 4621
DI 10.1016/j.polymer.2004.04.022
PG 23
WC Polymer Science
SC Polymer Science
GA 826NU
UT WOS:000221836600027
ER
PT J
AU Opdahl, A
Koffas, TS
Amitay-Sadovsky, E
Kim, J
Somorjai, GA
AF Opdahl, A
Koffas, TS
Amitay-Sadovsky, E
Kim, J
Somorjai, GA
TI Characterization of polymer surface structure and surface mechanical
behaviour by sum frequency generation surface vibrational spectroscopy
and atomic force microscopy
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Review
ID HYDROGEL CONTACT-LENSES; POLYSTYRENE SURFACE; SIDE BRANCHES; SFG;
INTERFACES; WATER; FILMS; CONFORMATION; CATALYSIS; ALIGNMENT
AB Sum frequency generation (SFG) vibrational spectroscopy and atomic force microscopy (AFM) have been used to study polymer surface structure and surface mechanical behaviour, specifically to study the relationships between the surface properties of polymers and their bulk compositions and the environment to which the polymer is exposed. The combination of SFG surface vibrational spectroscopy and AFM has been used to study surface segregation behaviour of polyolefin blends at the polymer/air and polymer/solid interfaces. SFG surface vibrational spectroscopy and AFM experiments have also been performed to characterize the properties of polymer/liquid and polymer/polymer interfaces, focusing on hydrogel materials. A method was developed to study the surface properties of hydrogel contact lens materials at various hydration conditions. Finally, the effect of mechanical stretching on the surface composition and surface mechanical behaviour of phase-separated polyurethanes, used in biomedical implant devices, has been studied by both SFG surface vibrational spectroscopy and AFM.
C1 Univ Calif Berkeley, Dept Chem, Berkeley & Mat Sci Div, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA.
RP Opdahl, A (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley & Mat Sci Div, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM somorjai@socrates.berkeley.edu
NR 56
TC 17
Z9 18
U1 3
U2 20
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD JUN 2
PY 2004
VL 16
IS 21
BP R659
EP R677
AR PII S0953-8984(04)59532-2
DI 10.1088/0953-8984/16/21/RO2
PG 19
WC Physics, Condensed Matter
SC Physics
GA 830CX
UT WOS:000222100300003
ER
PT J
AU Velev, J
Butler, W
AF Velev, J
Butler, W
TI On the equivalence of different techniques for evaluating the Green
function for a semi-infinite system using a localized basis
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Review
ID SURFACE-BAND CALCULATIONS; TIGHT-BINDING BANDS; ELECTRONIC-STRUCTURE;
ATOMIC ENVIRONMENT; SIMPLE SCHEME; INTERFACES; SOLIDS
AB We discuss several different techniques for evaluating the Green function for a semi-infinite system using a localized basis. We demonstrate that the different techniques are different ways of calculating the self-energy associated with the surface. They give equivalent results but have different convergence properties.
C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA.
Univ Alabama, Ctr Mat Informat Technol, Tuscaloosa, AL 35487 USA.
RP Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA.
NR 29
TC 36
Z9 36
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 JUN 2
PY 2004
VL 16
IS 21
BP R637
EP R657
AR PII S0953-8984(04)77181-7
DI 10.1088/0953-8984/16/21/R01
PG 21
WC Physics, Condensed Matter
SC Physics
GA 830CX
UT WOS:000222100300002
ER
PT J
AU Vu, DM
Peterson, ES
Dyer, RB
AF Vu, DM
Peterson, ES
Dyer, RB
TI Experimental resolution of early steps in protein folding: Testing
molecular dynamics simulations
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID 3-HELIX BUNDLE PROTEIN; TEMPERATURE-JUMP; FAST EVENTS; HELIX; MODEL;
PEPTIDE; CONFORMATION; SPECTROSCOPY; SECONDARY; PATHWAYS
C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
Bowdoin Coll, Dept Chem, Brunswick, ME 04011 USA.
RP Dyer, RB (reprint author), Los Alamos Natl Lab, Biosci Div, MS J586, Los Alamos, NM 87545 USA.
EM bdyer@lanl.gov
FU NIGMS NIH HHS [GM 53640]
NR 24
TC 22
Z9 22
U1 0
U2 6
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 JUN 2
PY 2004
VL 126
IS 21
BP 6546
EP 6547
DI 10.1021/ja048416q
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA 824FL
UT WOS:000221671400022
PM 15161270
ER
PT J
AU Franz, JA
Birnbaum, JC
Kolwaite, DS
Linehan, JC
Camaioni, DM
Dupuis, M
AF Franz, JA
Birnbaum, JC
Kolwaite, DS
Linehan, JC
Camaioni, DM
Dupuis, M
TI Activation of the sulfhydryl group by Mo centers: Kinetics of reaction
of benzyl radical with a binuclear Mo(mu-SH)Mo complex and with arene
and alkane thiols
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID HYDROGEN-ATOM ABSTRACTION; EFFECTIVE CORE POTENTIALS; COMPACT EFFECTIVE
POTENTIALS; TRANSITION-METAL HYDRIDES; ABSOLUTE RATE EXPRESSIONS;
EXPONENT BASIS-SETS; MOLECULAR CALCULATIONS; MOLYBDENUM COMPLEXES; RATE
CONSTANTS; SULFIDO LIGANDS
AB This paper provides evidence from kinetic experiments and electronic structure calculations of a significantly reduced S-H bond strength in the Mo(mu-SH)Mo function in the homogeneous catalyst model, CpMo(mu-S)(2)(mu-SH)(2)MoCp (1, Cp = eta(5)-cyclopentadienyl). The reactivity of 1 was explored by determination of a rate expression for hydrogen atom abstraction by benzyl radical from 1 (log(k(abs)/M-1 s(-1)) = (9.07 +/- 0.38) - (3.62 +/- 0.58)/theta) for comparison with expressions for CH3(CH2)(7)SH, log(k(abs)/M-1 s(-1)) = (7.88 +/- 0.35) - (4.64 +/- 0.54)/theta, and for 2-mercaptonaphthalene, log(k(abs)/M-1 s(-1)) = (8.21 +/- 0.17) - (4.24 +/- 0.26)/theta (theta = 2.303RT kcal/mol, 2sigma error). The rate constant for hydrogen atom abstraction at 298 K by benzyl radical from 1 is 2 orders of magnitude greater than that from 1-octanethiol, resulting from the kpredicted (DFT) S-H bond strength of 1 of 73 kcal/mol. The radical CpMo(mu-S)(3)(mu-SH)MoCp, 2, is revealed, from the properties of slow self-reaction, and exclusive cross-combination with reactive benzyl radical, to be a persistent free radical.
C1 Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Franz, JA (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA.
EM james.franz@pnl.gov; jerome.birnbaum@pnl.gov
NR 69
TC 8
Z9 8
U1 2
U2 6
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 JUN 2
PY 2004
VL 126
IS 21
BP 6680
EP 6691
DI 10.1021/ja049321r
PG 12
WC Chemistry, Multidisciplinary
SC Chemistry
GA 824FL
UT WOS:000221671400048
PM 15161296
ER
PT J
AU Davis, TA
AF Davis, TA
TI A column pre-ordering strategy for the unsymmetric-pattern multifrontal
method
SO ACM TRANSACTIONS ON MATHEMATICAL SOFTWARE
LA English
DT Article
DE algorithms; experimentation; performance; sparse nonsymmetric matrices;
linear equations; multifrontal method; ordering methods
ID SPARSE MATRICES; LU FACTORIZATION; LINEAR-EQUATIONS; SYMBOLIC
FACTORIZATION; GAUSSIAN-ELIMINATION; SOLVING SPARSE; SYSTEMS;
ALGORITHMS; DESIGN; FILL
AB A new method for sparse LU factorization is presented that combines a column pre-ordering strategy with a right-looking unsymmetric-pattern multifrontal numerical factorization. The column ordering is selected to give a good a priori upper bound on fill-in and then refined during numerical factorization ( while preserving the bound). Pivot rows are selected to maintain numerical stability and to preserve sparsity. The method analyzes the matrix and automatically selects one of three pre-ordering and pivoting strategies. The number of nonzeros in the LU factors computed by the method is typically less than or equal to those found by a wide range of unsymmetric sparse LU factorization methods, including left-looking methods and prior multifrontal methods.
C1 Univ Florida, Comp & Informat Sci & Engn Dept, Gainesville, FL 32611 USA.
Stanford Univ, Stanford, CA 94305 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Davis, TA (reprint author), Univ Florida, Comp & Informat Sci & Engn Dept, Gainesville, FL 32611 USA.
EM davis@cise.ufl.edu
RI Davis, Timothy/I-7248-2012
NR 58
TC 183
Z9 187
U1 0
U2 3
PU ASSOC COMPUTING MACHINERY
PI NEW YORK
PA 1515 BROADWAY, NEW YORK, NY 10036 USA
SN 0098-3500
J9 ACM T MATH SOFTWARE
JI ACM Trans. Math. Softw.
PD JUN
PY 2004
VL 30
IS 2
BP 165
EP 195
DI 10.1145/992200.992205
PG 31
WC Computer Science, Software Engineering; Mathematics, Applied
SC Computer Science; Mathematics
GA 827TP
UT WOS:000221924200005
ER
PT J
AU Davis, TA
AF Davis, TA
TI Algorithm 832: UMFPACK V4.3 - An unsymmetric-pattern multifrontal method
SO ACM TRANSACTIONS ON MATHEMATICAL SOFTWARE
LA English
DT Article
DE algorithms; experimentation; performance; sparse nonsymmetric matrices;
linear equations; multifrontal method; ordering methods
AB An ANSI C code for sparse LU factorization is presented that combines a column pre-ordering strategy with a right-looking unsymmetric-pattern multifrontal numerical factorization. The pre-ordering and symbolic analysis phase computes an upper bound on fill-in, work, and memory usage during the subsequent numerical factorization. User-callable routines are provided for ordering and analyzing a sparse matrix, computing the numerical factorization, solving a system with the LU factors, transposing and permuting a sparse matrix, and converting between sparse matrix representations. The simple user interface shields the user from the details of the complex sparse factorization data structures by returning simple handles to opaque objects. Additional user-callable routines are provided for printing and extracting the contents of these opaque objects. An even simpler way to use the package is through its MATLAB interface. UMFPACK is incorporated as a built-in operator in MATLAB 6.5 as x = A\b when A is sparse and unsymmetric.
C1 Univ Florida, Comp & Informat Sci & Engn Dept, Gainesville, FL 32611 USA.
Stanford Univ, Stanford, CA 94305 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Davis, TA (reprint author), Univ Florida, Comp & Informat Sci & Engn Dept, Gainesville, FL 32611 USA.
EM davis@cise.ufl.edu
RI Davis, Timothy/I-7248-2012
NR 1
TC 522
Z9 535
U1 2
U2 17
PU ASSOC COMPUTING MACHINERY
PI NEW YORK
PA 1515 BROADWAY, NEW YORK, NY 10036 USA
SN 0098-3500
J9 ACM T MATH SOFTWARE
JI ACM Trans. Math. Softw.
PD JUN
PY 2004
VL 30
IS 2
BP 196
EP 199
DI 10.1145/992200.992206
PG 4
WC Computer Science, Software Engineering; Mathematics, Applied
SC Computer Science; Mathematics
GA 827TP
UT WOS:000221924200006
ER
PT J
AU Banumathi, S
Zwart, PH
Ramagopal, UA
Dauter, M
Dauter, Z
AF Banumathi, S
Zwart, PH
Ramagopal, UA
Dauter, M
Dauter, Z
TI Structural effects of radiation damage and its potential for phasing
SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
LA English
DT Article
ID X-RAY-DIFFRACTION; PROTEIN CRYSTALS; MACROMOLECULAR CRYSTALLOGRAPHY;
SYNCHROTRON-RADIATION; REFINEMENT; RESOLUTION; CRYOCRYSTALLOGRAPHY
AB A detailed analysis of radiation-damage-induced structural and intensity changes is presented on the model protein thaumatin. Changes in reflection intensities induced by irradiation display a parabolic character. The most pronounced structural changes observed were disulfide-bond breakage and associated main-chain and side-chain movements as well as decarboxylation of aspartate and glutamate residues. The structural changes induced on the sulfur atoms were successfully used to obtain high-quality phase estimates via an RIP procedure. Results obtained with ACORN suggest that the contribution originating from the partial structure may play an important role in phasing even at less than atomic resolution.
C1 Brookhaven Natl Lab, Natl Canc Inst, MCL, Synchrotron Radiat Res Sect, Upton, NY 11973 USA.
Brookhaven Natl Lab, SAIC frederick Inc, Basic Res Program, Upton, NY 11973 USA.
RP Dauter, Z (reprint author), Brookhaven Natl Lab, Natl Canc Inst, MCL, Synchrotron Radiat Res Sect, Upton, NY 11973 USA.
EM dauter@bnl.gov
FU NCI NIH HHS [N01-CO-12400]
NR 40
TC 50
Z9 50
U1 0
U2 5
PU BLACKWELL MUNKSGAARD
PI COPENHAGEN
PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK
SN 0907-4449
J9 ACTA CRYSTALLOGR D
JI Acta Crystallogr. Sect. D-Biol. Crystallogr.
PD JUN
PY 2004
VL 60
BP 1085
EP 1093
DI 10.1107/S0907444904007917
PN 6
PG 9
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
Biophysics; Crystallography
SC Biochemistry & Molecular Biology; Biophysics; Crystallography
GA 822WZ
UT WOS:000221572600012
PM 15159568
ER
PT J
AU Janda, I
Devedjiev, Y
Cooper, D
Chruszcz, M
Derewenda, U
Gabrys, A
Minor, W
Joachimiak, A
Derewenda, ZS
AF Janda, I
Devedjiev, Y
Cooper, D
Chruszcz, M
Derewenda, U
Gabrys, A
Minor, W
Joachimiak, A
Derewenda, ZS
TI Harvesting the high-hanging fruit: the structure of the YdeN gene
product from Bacillus subtilis at 1.8 angstrom resolution
SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
LA English
DT Article
ID CRYSTAL-STRUCTURE; PROTEIN CRYSTALLIZATION; FOLD RECOGNITION;
REFINEMENT; GENOMICS; 1.5-ANGSTROM; THIOESTERASE; HYDROLASES; ESTERASES;
MUTATIONS
AB High-throughput ( HT) protein crystallography is severely impeded by the relatively low success rate of protein crystallization. Proteins whose structures are not solved in the HT pipeline owing to attrition in any phase of the project are referred to as the high-hanging fruit, in contrast to those proteins that yielded good-quality crystals and crystal structures, which are referred to as low-hanging fruit. It has previously been shown that proteins that do not crystallize in the wild-type form can have their surfaces engineered by site-directed mutagenesis in order to create patches of low conformational entropy that are conducive to forming intermolecular interactions. The application of this method to selected proteins from the Bacillus subtilis genome which failed to crystallize in the HT mode is now reported. In this paper, the crystal structure of the product of the YdeN gene is reported. Of three prepared double mutants, i.e. E124A/ K127A, E167A/E169A and K88A/Q89A, the latter gave high-quality crystals and the crystal structure was solved by SAD at 1.8 Angstrom resolution. The protein is a canonical alpha/beta hydrolase, with an active site that is accessible to solvent.
C1 Univ Virginia, Dept Mol Physiol & Biol Phys, Charlottesville, VA 22908 USA.
Argonne Natl Lab, Biosci Div, Argonne, IL 60439 USA.
Argonne Natl Lab, Struct Biol Ctr, Argonne, IL 60439 USA.
RP Derewenda, ZS (reprint author), Univ Virginia, Dept Mol Physiol & Biol Phys, Charlottesville, VA 22908 USA.
EM zsd4n@virginia.edu
RI Chruszcz, Maksymilian/E-6407-2011; Minor, Wladek/F-3096-2014
FU NIGMS NIH HHS [GM62615, P-50-GM62414, P50 GM062414, P50 GM062414-02, R01
GM062615]
NR 43
TC 17
Z9 18
U1 0
U2 4
PU BLACKWELL MUNKSGAARD
PI COPENHAGEN
PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK
SN 0907-4449
J9 ACTA CRYSTALLOGR D
JI Acta Crystallogr. Sect. D-Biol. Crystallogr.
PD JUN
PY 2004
VL 60
BP 1101
EP 1107
DI 10.1107/S0907444904007188
PN 6
PG 7
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
Biophysics; Crystallography
SC Biochemistry & Molecular Biology; Biophysics; Crystallography
GA 822WZ
UT WOS:000221572600014
PM 15159570
ER
PT J
AU Ni, SS
McAteer, K
Bussiere, DE
Kennedy, MA
AF Ni, SS
McAteer, K
Bussiere, DE
Kennedy, MA
TI Crystallization and preliminary crystallographic analysis of an
Enterococcus faecalis repressor protein, CylR2, involved in regulating
cytolysin production through quorum-sensing
SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
LA English
DT Article
ID VIRULENCE
AB CylR2 is one of two regulatory proteins associated with the quorum-sensing-dependent synthesis of cytolysin in the common pathogen Enterococcus faecalis. The protein was expressed with a C-terminal six-histidine tag and purified to homogeneity with a cobalt-affinity column followed by size-exclusion chromatography. Both native and SeMet proteins were produced and crystallized. Complete X-ray diffraction data sets were collected from a native crystal, which diffracted to 2.3 Angstrom resolution, and a SeMet crystal, which diffracted to 2.1 Angstrom. The crystals were tetragonal, belonging to space group P4(1) or P4(3), with unit-cell parameters a=b=66.2, c=40.9 Angstrom, alpha=beta=gamma=90degrees. Based on the calculated Matthews coefficient of 2.6 Angstrom(3) Da(-1) as well as analysis of anomalous difference Patterson maps, the asymmetric unit most likely contains two molecules of CylR2.
C1 Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA.
Chiron Corp, Emeryville, CA 94608 USA.
RP Kennedy, MA (reprint author), Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA.
EM ma_kennedy@pnl.gov
NR 13
TC 1
Z9 1
U1 0
U2 1
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0907-4449
J9 ACTA CRYSTALLOGR D
JI Acta Crystallogr. Sect. D-Biol. Crystallogr.
PD JUN
PY 2004
VL 60
BP 1145
EP 1148
DI 10.1107/S0907444904008078
PN 6
PG 4
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
Biophysics; Crystallography
SC Biochemistry & Molecular Biology; Biophysics; Crystallography
GA 822WZ
UT WOS:000221572600027
PM 15159583
ER
PT J
AU Therrien, B
Burrel, AK
AF Therrien, B
Burrel, AK
TI Dichloro(eta(6)-p-cymene)[eta(1)-(2,4,6-tri-tert-butylphenyl)phosphine-k
appa P]osmium(II)
SO ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE
LA English
DT Article
ID OSMIUM
AB In the title compound, [Os(C10H14)Cl-2(C18H31P)], The presence of bulky substituents imposes a structural distortion on the (2,4,6-tri-tert-butylphenyl)phosphine ligand, which is bowed.
C1 Univ Neuchatel, Inst Chim, CH-2007 Neuchatel, Switzerland.
Los Alamos Natl Lab, CSIC, Los Alamos, NM 87545 USA.
RP Therrien, B (reprint author), Univ Neuchatel, Inst Chim, Case Postale 2, CH-2007 Neuchatel, Switzerland.
EM bruno.therrien@unine.ch
NR 8
TC 1
Z9 1
U1 1
U2 3
PU BLACKWELL MUNKSGAARD
PI COPENHAGEN
PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK
SN 1600-5368
J9 ACTA CRYSTALLOGR E
JI Acta Crystallogr. Sect. E.-Struct Rep. Online
PD JUN
PY 2004
VL 60
BP M863
EP M864
DI 10.1107/S1600536804012474
PN 6
PG 2
WC Crystallography
SC Crystallography
GA 833WJ
UT WOS:000222371200063
ER
PT J
AU Olbrechts, P
Ackermann, M
Ahrens, J
Albrecht, H
Bai, X
Bay, R
Bartelt, M
Barwick, SW
Becka, T
Becker, KH
Becker, JK
Bernardini, E
Bertrand, D
Boersma, DJ
Boser, S
Botner, O
Bouchta, A
Bouhali, O
Braun, J
Burgess, C
Burgess, T
Castermans, T
Chirkin, D
Collin, B
Conrad, J
Cooley, J
Cowen, DF
Davour, A
De Clercq, C
DeYoung, T
Desiati, P
Ekstrom, P
Feser, T
Gaisser, TK
Ganugapati, R
Geenen, H
Gerhardt, L
Goldschmidt, A
Gross, A
Hallgren, A
Halzen, F
Hanson, K
Hardtke, R
Harenberg, T
Hauschildt, T
Helbing, K
Hellwig, M
Herquet, P
Hill, GC
Hodges, J
Hubert, D
Hughey, B
Hulth, PO
Hultqvist, K
Hundertmark, S
Jacobsen, J
Kampert, KH
Karle, A
Kelley, J
Kestel, M
Kopke, L
Kowalski, M
Krasberg, M
Kuehn, K
Leich, H
Leuthold, M
Liubarsky, I
Madsen, J
Mandli, K
Marciniewski, P
Matis, HS
McParland, CP
Messarius, T
Minaeva, Y
Miocinovic, P
Morse, R
Munich, K
Nahnhauer, R
Nam, JW
Neunhoffer, T
Niessen, P
Nygren, DR
Ogelman, H
Olbrechts, P
De Los Heros, CP
Pohl, AC
Porrata, R
Price, PB
Przybylski, GT
Rawlins, K
Resconi, E
Rhode, W
Ribordy, M
Richter, S
Martino, JR
Sander, HG
Schinarakis, K
Schlenstedt, S
Schneider, D
Schwarz, R
Silvestri, A
Solarz, M
Spiczak, GM
Spiering, C
Stamatikos, M
Steele, D
Steffen, P
Stokstad, RG
Sulanke, KH
Taboada, I
Wang, YR
Wiebusch, CH
Wischnewski, R
Wissing, H
Woschnagg, K
Yodh, G
AF Olbrechts, P
Ackermann, M
Ahrens, J
Albrecht, H
Bai, X
Bay, R
Bartelt, M
Barwick, SW
Becka, T
Becker, KH
Becker, JK
Bernardini, E
Bertrand, D
Boersma, DJ
Boser, S
Botner, O
Bouchta, A
Bouhali, O
Braun, J
Burgess, C
Burgess, T
Castermans, T
Chirkin, D
Collin, B
Conrad, J
Cooley, J
Cowen, DF
Davour, A
De Clercq, C
DeYoung, T
Desiati, P
Ekstrom, P
Feser, T
Gaisser, TK
Ganugapati, R
Geenen, H
Gerhardt, L
Goldschmidt, A
Gross, A
Hallgren, A
Halzen, F
Hanson, K
Hardtke, R
Harenberg, T
Hauschildt, T
Helbing, K
Hellwig, M
Herquet, P
Hill, GC
Hodges, J
Hubert, D
Hughey, B
Hulth, PO
Hultqvist, K
Hundertmark, S
Jacobsen, J
Kampert, KH
Karle, A
Kelley, J
Kestel, M
Kopke, L
Kowalski, M
Krasberg, M
Kuehn, K
Leich, H
Leuthold, M
Liubarsky, I
Madsen, J
Mandli, K
Marciniewski, P
Matis, HS
McParland, CP
Messarius, T
Minaeva, Y
Miocinovic, P
Morse, R
Munich, K
Nahnhauer, R
Nam, JW
Neunhoffer, T
Niessen, P
Nygren, DR
Ogelman, H
Olbrechts, P
De Los Heros, CP
Pohl, AC
Porrata, R
Price, PB
Przybylski, GT
Rawlins, K
Resconi, E
Rhode, W
Ribordy, M
Richter, S
Martino, JR
Sander, HG
Schinarakis, K
Schlenstedt, S
Schneider, D
Schwarz, R
Silvestri, A
Solarz, M
Spiczak, GM
Spiering, C
Stamatikos, M
Steele, D
Steffen, P
Stokstad, RG
Sulanke, KH
Taboada, I
Wang, YR
Wiebusch, CH
Wischnewski, R
Wissing, H
Woschnagg, K
Yodh, G
TI Results from the Amanda detector
SO ACTA PHYSICA POLONICA B
LA English
DT Article; Proceedings Paper
CT 10th Cracow Epiphany Conference on Astroparticle Physics
CY JAN 08-11, 2004
CL Polish Acad Arts & Sci, Cracow, POLAND
SP Inst Nucl Phys, Henryk Niewodniczanski, Jagiellonian Univ, AGH Univ Sci & Technol
HO Polish Acad Arts & Sci
ID HIGH-ENERGY NEUTRINOS; SEARCH
AB The Antarctic Muon And Neutrino Detector Array (AMANDA) is a high-energy neutrino telescope based at the geographic South Pole. It is a lattice of photo-multiplier tubes buried deep in the polar ice, which is used as interaction and detection medium. The primary goal of this detector is the observation of astronomical sources of high-energy neutrinos. This paper shows the latest results of the search for a diffuse flux of extraterrestrial v(mu)s with energies between 10(11) eV and 10(18) eV, v(mu)s emitted from point sources and v(mu)s from dark matter annihilation in the Earth and the Sun.
C1 DESY, D-15735 Zeuthen, Germany.
Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA.
Berg Univ Gesamthsch Wuppertal, Dept Phys, D-42097 Wuppertal, Germany.
Free Univ Brussels, Fac Sci, B-1050 Brussels, Belgium.
Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England.
Kalmar Univ, Dept Technol, S-39182 Kalmar, Sweden.
Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
Penn State Univ, Dept Phys, University Pk, PA 16802 USA.
Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
Univ Mainz, Inst Phys, D-55099 Mainz, Germany.
Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
Univ Mons, B-7000 Mons, Belgium.
Univ Simon Bolivar, Dept Fis, Caracas 1080, Venezuela.
Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
Univ Wisconsin, Dept Phys, River Falls, WI 54022 USA.
Univ Uppsala, Div High Energy Phys, S-75121 Uppsala, Sweden.
Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden.
Free Univ Brussels, Dienst ELEM, B-1050 Brussels, Belgium.
RP Olbrechts, P (reprint author), DESY, D-15735 Zeuthen, Germany.
RI Wiebusch, Christopher/G-6490-2012; Kowalski, Marek/G-5546-2012;
Hundertmark, Stephan/A-6592-2010; Botner, Olga/A-9110-2013; Hallgren,
Allan/A-8963-2013;
OI Wiebusch, Christopher/0000-0002-6418-3008; Perez de los Heros,
Carlos/0000-0002-2084-5866; Kampert, Karl-Heinz/0000-0002-2805-0195;
Hubert, Daan/0000-0002-4365-865X
NR 25
TC 0
Z9 0
U1 0
U2 0
PU ACTA PHYSICA POLONICA B, JAGELLONIAN UNIV, INST PHYSICS
PI KRAKOW
PA REYMONTA 4, 30-059 KRAKOW, POLAND
SN 0587-4254
J9 ACTA PHYS POL B
JI Acta Phys. Pol. B
PD JUN-JUL
PY 2004
VL 35
IS 6-7
BP 1919
EP 1931
PG 13
WC Physics, Multidisciplinary
SC Physics
GA 835QX
UT WOS:000222501700013
ER
PT J
AU Gao, JB
Liu, DG
Sansinena, JM
Wang, HL
AF Gao, JB
Liu, DG
Sansinena, JM
Wang, HL
TI Synthesis and characterization of electrochromic polyamides with
well-defined molecular structures and redox properties
SO ADVANCED FUNCTIONAL MATERIALS
LA English
DT Article
ID EMI-SHIELDING MEASUREMENTS; SOLUBLE POLYANILINE; FUNCTIONALIZED
OLIGOANILINES; NMR CHARACTERIZATION; CONDUCTING POLYMERS; SULFONIC-ACID;
THIN-FILM; BLENDS; ACTUATORS; CORROSION
AB In this paper we report the synthesis and characterization of a series of electrochromic polyamides (alternating copolymers). the synthesis proceeds via the condensation polymerization between amine-capped oligoaniline and acyl chlorides such as isophthaloyl dichloride, terephthaloyl chlorode, azelaoyl chloride, and dodecandioyl dichloride. Both the orthogonal tert-butoxy-carbonyl (BOC), group on the oligoaniline segment and the non-conjugated aromatic or aliphatic segment on the polymer backbone play a vital role in the formation of the final polyamides with good solubility in common organic solvents. we cast thin polyamide films from their chloroform solutions and studies their electrochemical behavior and spectroscopic properties. In contrast to the polyaniline, the copolymers bearing oligoaniline segments show four distinct oxidation states, which were fully characterized using IR and UV-vis spectroscopy. The copolymer thin films also exhibit electrochromic behavior when a linear potential sweep is applied. Compared with the polyaniline, the polyamides adhere much more strongly to the indium tin oxide (ITO) coated glass and show the signs of delamination after hundreds of redox cycles in a hydrochloric acid solution. We believe that these factors make these novel polyamides very attractive as electrochromic materials.
C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
RP Gao, JB (reprint author), Los Alamos Natl Lab, Biosci Div, POB 1663, Los Alamos, NM 87545 USA.
EM hwang@lanl.gov
NR 37
TC 83
Z9 85
U1 6
U2 33
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1616-301X
J9 ADV FUNCT MATER
JI Adv. Funct. Mater.
PD JUN
PY 2004
VL 14
IS 6
BP 537
EP 543
DI 10.1002/adfm.200305087
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 834MW
UT WOS:000222416200002
ER
PT J
AU Kowalsky, MB
Finsterle, S
Rubin, Y
AF Kowalsky, MB
Finsterle, S
Rubin, Y
TI Estimating flow parameter distributions using ground-penetrating radar
and hydrological measurements during transient flow in the vadose zone
SO ADVANCES IN WATER RESOURCES
LA English
DT Article
DE vadose zone; GPR; pilot point; joint inversion; transient data;
hydraulic parameters
ID SOIL HYDRAULIC-PROPERTIES; SIMULATED TRANSMISSIVITY FIELDS; PILOT POINT
METHODOLOGY; CROSS-BOREHOLE RADAR; WATER-CONTENT; AUTOMATED CALIBRATION;
SPATIAL VARIABILITY; UNSATURATED SOIL; INVERSE PROBLEM; MODEL
AB Methods for estimating the parameter distributions necessary for modeling fluid flow and contaminant transport in the shallow subsurface are in great demand. Soil properties such as permeability, porosity, and water retention are typically estimated through the inversion of hydrological data (e.g., measurements of capillary pressure and water saturation). However, ill-posedness and nonuniqueness commonly arise in such non-linear inverse problems making their solutions elusive. Incorporating additional types of data, such as from geophysical methods, may greatly improve the success of inverse modeling. In particular, ground-penetrating radar (GPR) methods have proven sensitive to subsurface fluid flow processes and appear promising for such applications. In the present work, an inverse technique is presented which allows for the estimation of flow parameter distributions and the prediction of flow phenomena using GPR and hydrological measurements collected during a transient flow experiment. Specifically, concepts from the pilot point method were implemented in a maximum a posteriori (MAP) framework to allow for the generation of permeability distributions that are conditional to permeability point measurements, that maintain specified patterns of spatial correlation, and that are consistent with geophysical and hydrological data. The current implementation of the approach allows for additional flow parameters to be estimated concurrently if they are assumed uniform and uncorrelated with the permeability distribution. (The method itself allows for heterogeneity in these parameters to be considered, and it allows for parameters of the petrophysical and semivariogram models to be estimated as well.) Through a synthetic example, performance of the method is evaluated under various conditions, and some conclusions are made regarding the joint use of transient GPR and hydrological measurements in estimating fluid flow parameters in the vadose zone. (C) 2004 Published by Elsevier Ltd.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Kowalsky, MB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, 1 Cyclotron Rd,MS 90-1116, Berkeley, CA 94720 USA.
EM mbkowalsky@lbl.gov; safinsterle@lbl.gov; rubin@ce.berkeley.edu
RI Finsterle, Stefan/A-8360-2009
OI Finsterle, Stefan/0000-0002-4446-9906
NR 54
TC 85
Z9 85
U1 1
U2 26
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0309-1708
J9 ADV WATER RESOUR
JI Adv. Water Resour.
PD JUN
PY 2004
VL 27
IS 6
BP 583
EP 599
DI 10.1016/j.advwatres.2004.03.003
PG 17
WC Water Resources
SC Water Resources
GA 826FH
UT WOS:000221814200002
ER
PT J
AU Lipsky, EM
Pekney, NJ
Walbert, GF
O'Dowd, WJ
Freeman, MC
Robinson, A
AF Lipsky, EM
Pekney, NJ
Walbert, GF
O'Dowd, WJ
Freeman, MC
Robinson, A
TI Effects of dilution sampling on fine particle emissions from pulverized
coal combustion
SO AEROSOL SCIENCE AND TECHNOLOGY
LA English
DT Article
ID FIRED POWER-PLANT; PLUMES; STACK; SELENIUM; OPACITY; EXHAUST; SULFUR;
POINT; GAS
AB A dilution sampler was used to examine the effects of dilution ratio and residence time on fine-particle emissions from a pilot-scale pulverized coal combustor. Measurements include the particle size distribution from 0.003 to 2.5 mum, PM2.5 mass, and PM2.5 composition (OC/EC, major ions, and elemental). Heated filter samples were also collected simultaneously at stack temperatures in order to compare the dilution sampler measurements with standard stack sampling methodologies. Measurements were made both before and after the bag house, the particle control device used on the coal combustor, and while firing three different coal types and one coal-biomass blend. The PM2.5 mass emission rates measured using the dilution sampler agreed to within experimental uncertainty with those measured with the hot-filter sampler. Relative to the heated filter sample, dilution did increase the PM2.5 mass fraction of selenium for all fuels tested, as well as ammonium and sulfate for selected fuels. However, the additional particulate mass created by gas-to-particle conversion of these species is within the uncertainty of the gravimetric analysis used to determine the overall mass emission rate. The enrichment of PM2.5 selenium caused by dilution did not vary with dilution ratio and residence time. The enrichment of PM2.5 sulfate and ammonium varied with fuel composition and dilution ratio but not residence time. For example, ammonium was only enriched in diluted acidic aerosol samples. A comparison of the PM2.5 emission profiles for each of the fuels tested underscores how differences in PM2.5 composition are related to the fuel ash composition. When sampling after the bag house, the particle size distribution and total particle number emission rate did not depend on residence time and dilution ratio because of the much lower particle number concentrations in diluted sample and the absence of nucleation. These results provide new insight into the effects of dilution sampling on measurements of fine particle emissions, providing important data for the ongoing effort of the EPA and ASTM to define a standardized dilution sampling methodology for characterizing emissions from stationary combustion sources.
C1 Carnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA.
Carnegie Mellon Univ, Dept Civil & Environm Engn, Pittsburgh, PA 15213 USA.
US DOE, Natl Energy Technol Lab, Pittsburgh, PA USA.
RP Robinson, A (reprint author), Carnegie Mellon Univ, Dept Mech Engn, 5000 Forbes Ave, Pittsburgh, PA 15213 USA.
EM alr@andrew.cmu.edu
RI Robinson, Allen/I-5713-2012; Robinson, Allen/M-3046-2014
OI Robinson, Allen/0000-0003-1053-7090; Robinson, Allen/0000-0002-1819-083X
NR 25
TC 15
Z9 17
U1 0
U2 17
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0278-6826
J9 AEROSOL SCI TECH
JI Aerosol Sci. Technol.
PD JUN
PY 2004
VL 38
IS 6
BP 574
EP 587
DI 10.1080/02786820490479851
PG 14
WC Engineering, Chemical; Engineering, Mechanical; Environmental Sciences;
Meteorology & Atmospheric Sciences
SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric
Sciences
GA 841TF
UT WOS:000222953800002
ER
PT J
AU Yu, D
Sipos, T
Wu, MM
Bilbault, T
Lynch, MC
Naleway, C
AF Yu, D
Sipos, T
Wu, MM
Bilbault, T
Lynch, MC
Naleway, C
TI Effect of fluoride/essential oils-containing mouthrinse on the
microhardness of demineralized bovine enamel
SO AMERICAN JOURNAL OF DENTISTRY
LA English
DT Article
ID SODIUM-FLUORIDE; CARIES
AB Purpose: To assess the ability of a fluoride mouthrinse containing a fixed combination of essential oils (thymol, menthol, eucalyptol, and methyl salicylate) to inhibit demineralization as compared with that of a clinically established NaF rinse. Methods: Inhibition in sound bovine enamel to demineralization was assessed utilizing a cyclic T/R/D (treatment/remineralization/demineralization) in vitro model where Knoop microhardness was monitored over 6, 12, and 18 T/R/D cycles. Results: Both fluoride-containing mouthrinses resulted in statistically significant increase in microhardness when compared to the non-fluoride control mouthrinse, possibly demonstrating and validating the in vitro model's ability to parallel the clinically established benefit of a 0.022% NaF rinse to inhibit demineralization. In addition, the test formulation was shown to be "at least as good as" the NaF positive control in increasing enamel microhardness following each of the 6, 12, and 18 T/R/D cycles.
C1 Pfizer Inc, Consumer Healthcare R&D, Morris Plains, NJ USA.
Pfizer Inc, Digest Care Inc, Morris Plains, NJ USA.
Argonne Natl Lab, Argonne, IL 60439 USA.
RP Yu, D (reprint author), 175 Tabor Rd, Morris Plains, NJ 07950 USA.
EM Duncan.yu@pfizer.com
NR 15
TC 4
Z9 5
U1 0
U2 0
PU MOSHER & LINDER, INC
PI WESTON
PA 318 INDIAN TRACE #500, WESTON, FL 33326 USA
SN 0894-8275
J9 AM J DENT
JI Am. J. Dent.
PD JUN
PY 2004
VL 17
IS 3
BP 216
EP 218
PG 3
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA 838FK
UT WOS:000222698700016
PM 15301222
ER
PT J
AU Mendell, MJ
Lei, Q
Macher, JM
Cozen, M
Tsai, FC
Shendell, DG
AF Mendell, MJ
Lei, Q
Macher, JM
Cozen, M
Tsai, FC
Shendell, DG
TI Moisture-indicating microorganisms, water damage, and symptoms in 100 US
office buildings
SO AMERICAN JOURNAL OF EPIDEMIOLOGY
LA English
DT Meeting Abstract
CT 37th Annual Meeting of the Society-for-Epidemiologic-Research
CY JUN 15-18, 2004
CL Salt Lake City, UT
SP Soc Epidemiol Res
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
NR 0
TC 0
Z9 0
U1 0
U2 2
PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 0002-9262
J9 AM J EPIDEMIOL
JI Am. J. Epidemiol.
PD JUN 1
PY 2004
VL 159
IS 11
SU S
BP S21
EP S21
PG 1
WC Public, Environmental & Occupational Health
SC Public, Environmental & Occupational Health
GA 826GH
UT WOS:000221816800083
ER
PT J
AU Armien, B
Pascale, JM
Bayard, V
Munoz, C
Mosca, I
Guerrero, G
Armien, A
Quiroz, E
Castillo, Z
Zaldivar, Y
Gracia, F
Hjelle, B
Koster, F
AF Armien, B
Pascale, JM
Bayard, V
Munoz, C
Mosca, I
Guerrero, G
Armien, A
Quiroz, E
Castillo, Z
Zaldivar, Y
Gracia, F
Hjelle, B
Koster, F
TI High seroprevalence of hantavirus infection on the Azuero peninsula of
Panama
SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
LA English
DT Article
ID SOUTHWESTERN UNITED-STATES; SIN NOMBRE HANTAVIRUS; PULMONARY SYNDROME;
HEMORRHAGIC-FEVER; RENAL SYNDROME; OUTBREAK; DISEASE; VIRUS;
IDENTIFICATION; ARGENTINA
AB The first outbreak of hantavirus pulmonary syndrome (HPS) in Central America was documented on the Azuero peninsula of Panama in late 1999 and 2000. Reverse transcriptase-polymerase chain reaction evidence implicated only Choclo virus in symptomatic HPS with a mortality rate of 20%, although two rodent-borne hantaviruses (Choclo virus and Calabazo virus) were identified in the peridomestic habitat. Neighborhood serosurveys around case households found seroprevalence rates as high as 30%, the highest in the Americas except for western Paraguay. We report here population-based serosurveys for 1,346 adults and children in four communities, three on the Azuero peninsula and one in adjacent central Panama. Overall seroprevalence ranged from 33.2% in a population engaged in farming and fishing on Isla de Cahas, to 16.3% and 21.2% in two mainland agricultural communities, to 3.1% in central Panama, with a modest male predominance of 1.2:1. Nine percent of children 4-10 years old were seropositive, and seroprevalence increased with age in all communities, with highest levels of 52% in those 41-50 years old cohort on Isla de Canas. Univariate analysis identified correlations between seroprevalence and multiple agricultural and animal husbandry activities. However, stepwise logistic regression models identified only raising animals (cows, pigs, goats, poultry) and fishing as significant independent variables. Human infection with hantavirus on the Azuero peninsula, either with Choclo virus or combined with Calabazo virus, is frequent but rarely results in hospitalization due to respiratory illnesses resembling HPS.
C1 Gorgas Mem Inst Hlth Studies, Panama City, Panama.
Minist Hlth, Panama City, Panama.
Univ New Mexico, Hlth Sci Ctr, Albuquerque, NM 87131 USA.
Los Alamos Natl Lab, Los Alamos, NM USA.
RP Armien, B (reprint author), Gorgas Mem Inst Hlth Studies, Panama City, Panama.
EM barmien@gorgas.gob.pa; fkoster@irri.org
RI Armien, Anibal/A-6546-2010
FU NIAID NIH HHS [AI-45452]
NR 29
TC 24
Z9 26
U1 0
U2 0
PU AMER SOC TROP MED & HYGIENE
PI MCLEAN
PA 8000 WESTPARK DR, STE 130, MCLEAN, VA 22101 USA
SN 0002-9637
J9 AM J TROP MED HYG
JI Am. J. Trop. Med. Hyg.
PD JUN
PY 2004
VL 70
IS 6
BP 682
EP 687
PG 6
WC Public, Environmental & Occupational Health; Tropical Medicine
SC Public, Environmental & Occupational Health; Tropical Medicine
GA 831IK
UT WOS:000222187900019
PM 15211014
ER
EF