FN Thomson Reuters Web of Science™
VR 1.0
PT S
AU Stapp, HP
AF Stapp, Henry P.
BA Stapp, HP
BF Stapp, HP
TI Orthodox Interpretation and the Mind-Brain Connection
SO MINDFUL UNIVERSE: QUANTUM MECHANICS AND THE PARTICIPATING OBSERVER
SE Frontiers Collection
LA English
DT Article; Book Chapter
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Stapp, HP (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM hpstapp@lbl.gov; hpstapp@lbl.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 1612-3018
BN 978-3-540-72414-8
J9 FRONT COLLECT
PY 2007
BP 165
EP 168
D2 10.1007/978-3-540-72414-8
PG 4
WC History & Philosophy Of Science
SC History & Philosophy of Science
GA BLJ73
UT WOS:000270319900022
ER

PT S
AU Stapp, HP
AF Stapp, Henry P.
BA Stapp, HP
BF Stapp, HP
TI Locality in Physics
SO MINDFUL UNIVERSE: QUANTUM MECHANICS AND THE PARTICIPATING OBSERVER
SE Frontiers Collection
LA English
DT Article; Book Chapter
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Stapp, HP (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM hpstapp@lbl.gov; hpstapp@lbl.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 1612-3018
BN 978-3-540-72414-8
J9 FRONT COLLECT
PY 2007
BP 169
EP 171
D2 10.1007/978-3-540-72414-8
PG 3
WC History & Philosophy Of Science
SC History & Philosophy of Science
GA BLJ73
UT WOS:000270319900023
ER

PT S
AU Stapp, HP
AF Stapp, Henry P.
BA Stapp, HP
BF Stapp, HP
TI Einstein Locality and Spooky Action at a Distance
SO MINDFUL UNIVERSE: QUANTUM MECHANICS AND THE PARTICIPATING OBSERVER
SE Frontiers Collection
LA English
DT Article; Book Chapter
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Stapp, HP (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM hpstapp@lbl.gov; hpstapp@lbl.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 1612-3018
BN 978-3-540-72414-8
J9 FRONT COLLECT
PY 2007
BP 173
EP 179
D2 10.1007/978-3-540-72414-8
PG 7
WC History & Philosophy Of Science
SC History & Philosophy of Science
GA BLJ73
UT WOS:000270319900024
ER

PT S
AU Stapp, HP
AF Stapp, Henry P.
BA Stapp, HP
BF Stapp, HP
TI Nonlocality in the Quantum World
SO MINDFUL UNIVERSE: QUANTUM MECHANICS AND THE PARTICIPATING OBSERVER
SE Frontiers Collection
LA English
DT Article; Book Chapter
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Stapp, HP (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM hpstapp@lbl.gov; hpstapp@lbl.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 1612-3018
BN 978-3-540-72414-8
J9 FRONT COLLECT
PY 2007
BP 181
EP 186
D2 10.1007/978-3-540-72414-8
PG 6
WC History & Philosophy Of Science
SC History & Philosophy of Science
GA BLJ73
UT WOS:000270319900025
ER

PT S
AU Guo, Y
   Parker, LE
   Madhavan, R
AF Guo, Yi
   Parker, Lynne E.
   Madhavan, Raj
BE Nedjah, N
   DosSantosCoelho, N
   DeMacedoMourelle, L
TI Collaborative Robots for Infrastructure Security Applications
SO MOBILE ROBOTS: THE EVOLUTIONARY APPROACH
SE Studies in Computational Intelligence
LA English
DT Article; Book Chapter
AB We discuss techniques towards using collaborative robots for infrastructure security applications. A vast number of critical facilities, including power plants, military bases, water plants, air fields, and so forth, must be protected against unauthorized intruders. A team of mobile robots working cooperatively can alleviate human resources and improve effectiveness from human fatigue and boredom. This chapter addresses this scenario by first presenting distributed sensing algorithms for robot localization and 3D map building. We then describe a multi-robot motion planning algorithm according to a patrolling and threat response scenario. Neural network based methods are used for planning a complete coverage patrolling path. A block diagram of the system integration of sensing and planning is presented towards a successful proof of principle demonstration. Previous approaches to similar scenarios have been greatly limited by their reliance on global positioning systems, the need for the manual construction of facility maps, and the need for humans to plan and specify the individual robot paths for the mission. The proposed approaches overcome these limits and enable the systems to be deployed autonomously without modi. cations to the operating environment.
C1 [Guo, Yi] Stevens Inst Technol, Dept Elect & Comp Engn, Hoboken, NJ 07030 USA.
   [Parker, Lynne E.] Univ Tennessee, Dept Comp Sci, Knoxville, TN 37996 USA.
   [Madhavan, Raj] Oak Ridge Natl Lab, Computat Sci Div, Oak Ridge, TN 37831 USA.
   [Madhavan, Raj] NIST, Intelligent Syst Div, Gaithersburg, MD 20899 USA.
RP Guo, Y (reprint author), Stevens Inst Technol, Dept Elect & Comp Engn, Hoboken, NJ 07030 USA.
EM yguo1@stevens.edu; parker@cs.utk.edu; raj.madhavan@ieee.org
NR 14
TC 6
Z9 6
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 1860-949X
BN 978-3-540-49719-6
J9 STUD COMPUT INTELL
PY 2007
VL 50
BP 185
EP 200
D2 10.1007/978-3-540-49720
PG 16
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
   Electronic; Robotics
SC Computer Science; Engineering; Robotics
GA BNM78
UT WOS:000274990900009
ER

PT J
AU Huang, Y
   Feng, X
   Pharr, GM
   Hwang, KC
AF Huang, Y.
   Feng, X.
   Pharr, G. M.
   Hwang, K. C.
TI A nano-indentation model for spherical indenters
SO MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT IUTAM Symposium on Plasticity at the Micron Scale
CY MAY 21-25, 2006
CL Tech Univ Denmark, Lyngby, DENMARK
SP IUTAM
HO Tech Univ Denmark
ID STRAIN GRADIENT PLASTICITY; DEPTH-SENSING INDENTATION; CONVENTIONAL
   THEORY; BILINEAR BEHAVIOR; SINGLE-CRYSTALS; SIZE; DEFORMATION;
   NANOINDENTATION; DISLOCATION; HARDNESS
AB A model is developed for nano-indentation with spherical indenters. It is based on the Taylor dislocation model and is an extension of Qu et al's (2006 Int. J. Plast. 22 1265-86) micro-indentation model for spherical indenters to nano-indentation. For relatively large indenters (e.g. radii on the order of 100 mu m), the present model degenerates to Qu et al (2006 Int. J. Plast. 22 1265-86). For small indenters (e.g. radii on the order of 10 mu m), the maximum allowable geometrically necessary dislocation (GND) density is introduced to cap the GND density such that the latter does not become unrealistically high for small indenters. The present nano-indentation model agrees well with the indentation hardness data of iridium for both nano- and micro-indentation.
C1 Univ Illinois, Dept Engn Sci & Mech, Urbana, IL 61801 USA.
   Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA.
   Tsing Hua Univ, Dept Engn Mech, Beijing 100084, Peoples R China.
RP Huang, Y (reprint author), Univ Illinois, Dept Engn Sci & Mech, Urbana, IL 61801 USA.
RI HWANG, Keh-Chih/A-9989-2014; Huang, Yonggang/B-6998-2009; Feng,
   Xue/B-5063-2008
OI Feng, Xue/0000-0001-9242-8474
NR 38
TC 13
Z9 13
U1 0
U2 11
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0965-0393
J9 MODEL SIMUL MATER SC
JI Model. Simul. Mater. Sci. Eng.
PD JAN
PY 2007
VL 15
IS 1
SI SI
BP S255
EP S262
DI 10.1088/0965-0393/15/1/S19
PG 8
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 129KQ
UT WOS:000243728800020
ER

PT J
AU Vedadi, M
   Lew, J
   Artz, J
   Amani, M
   Zhao, Y
   Dong, AP
   Wasney, GA
   Gao, M
   Hills, T
   Brokx, S
   Qiu, W
   Sharma, S
   Diassiti, A
   Alam, Z
   Melone, M
   Mulichak, A
   Wernimont, A
   Bray, J
   Loppnau, P
   Plotnikova, O
   Newberry, K
   Sundararajan, E
   Houston, S
   Walker, J
   Tempel, W
   Bochkarev, A
   Kozieradzki, L
   Edwards, A
   Arrowsmith, C
   Roos, D
   Kain, K
   Hui, R
AF Vedadi, Masoud
   Lew, Jocelyne
   Artz, Jennifer
   Amani, Mehmaz
   Zhao, Yong
   Dong, Aiping
   Wasney, Gregory A.
   Gao, Mian
   Hills, Tanya
   Brokx, Stephen
   Qiu, Wei
   Sharma, Sujata
   Diassiti, Angelina
   Alam, Zahoor
   Melone, Michelle
   Mulichak, Anne
   Wernimont, Amy
   Bray, James
   Loppnau, Peter
   Plotnikova, Olga
   Newberry, Kate
   Sundararajan, Emayavaram
   Houston, Simon
   Walker, John
   Tempel, Wolfram
   Bochkarev, Alexey
   Kozieradzki, Lvona
   Edwards, Aled
   Arrowsmith, Cheryl
   Roos, David
   Kain, Kevin
   Hui, Raymond
TI Genome-scale protein expression and structural biology of Plasmodium
   falciparum and related Apicomplexan organisms
SO MOLECULAR AND BIOCHEMICAL PARASITOLOGY
LA English
DT Article
DE structural genomics; heterologous protein expression; Apicomplexa;
   malaria; crystallography; crystallization
ID ESCHERICHIA-COLI; MALARIA PARASITE; PROTEOMICS; SEQUENCE;
   CRYSTALLOGRAPHY; SIGNAL; GENES; TOOL
AB Parasites from the protozoan phylum Apicomplexa are responsible for diseases, such as malaria, toxoplasmosis and cryptosporidiosis, all of which have significantly higher rates of mortality and morbidity in economically underdeveloped regions of the world. Advances in vaccine development and drug discovery are urgently needed to control these diseases and can be facilitated by production of purified recombinant proteins from Apicomplexan genomes and determination of their 3D structures. To date, both heterologous expression and crystallization of Apicomplexan proteins have seen only limited success. In an effort to explore the effectiveness of producing and crystallizing proteins on a genome-scale using a standardized methodology, over 400 distinct Plasmodium falciparum target genes were chosen representing different cellular classes, along with select orthologues from four other Plasmodium species as well as Cryptosporidium parvum and Toxoplasma gondii. From a total of 1008 genes from the seven genomes, 304 (30.2%) produced purified soluble proteins and 97 (9.6%) crystallized, culminating in 36 crystal structures. These results demonstrate that, contrary to previous findings, a standardized platform using Escherichia coli can be effective for genome-scale production and crystallography of Apicomplexan proteins. Predictably, orthologous proteins from different Apicomplexan genomes behaved differently in expression, purification and crystallization, although the overall success rates of Plasmodium orthologues do not differ significantly. Their differences were effectively exploited to elevate the overall productivity to levels comparable to the most successful ongoing structural genomics projects: 229 of the 468 target genes produced purified soluble protein from one or more organisms, with 80 and 32 of the purified targets, respectively, leading to crystals and ultimately structures from one or more orthologues. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Toronto, Struct Genom Consortium, Toronto, ON M5G 1L5, Canada.
   Toronto Gen Hosp, McLaughlin Rotman Ctr Global Hlth, Toronto, ON M5G 2C4, Canada.
   Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
   Univ Oxford, SGC, Oxford OX1 2JD, England.
   Univ Penn, Dept Biol, Philadelphia, PA 19104 USA.
RP Hui, R (reprint author), Univ Toronto, Struct Genom Consortium, 100 Coll St,Rm 522B, Toronto, ON M5G 1L5, Canada.
EM raymond.hui@utoronto.ca
OI Artz, Jennifer/0000-0003-0500-6156
FU Wellcome Trust
NR 25
TC 154
Z9 160
U1 4
U2 14
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0166-6851
J9 MOL BIOCHEM PARASIT
JI Mol. Biochem. Parasitol.
PD JAN
PY 2007
VL 151
IS 1
BP 100
EP 110
DI 10.1016/j.molbiopara.2006.10.011
PG 11
WC Biochemistry & Molecular Biology; Parasitology
SC Biochemistry & Molecular Biology; Parasitology
GA 125JK
UT WOS:000243438000011
PM 17125854
ER

PT J
AU Zhu, QW
   Krakowski, AR
   Dunham, EE
   Wang, L
   Bandyopadhyay, A
   Berdeaux, R
   Martin, GS
   Sun, LZ
   Luo, KX
AF Zhu, Qingwei
   Krakowski, Ariel R.
   Dunham, Elizabeth E.
   Wang, Long
   Bandyopadhyay, Abhik
   Berdeaux, Rebecca
   Martin, G. Steven
   Sun, LuZhe
   Luo, Kunxin
TI Dual role of SnoN in mammalian tumorigenesis
SO MOLECULAR AND CELLULAR BIOLOGY
LA English
DT Article
ID TRANSFORMING-GROWTH-FACTOR; FACTOR-BETA; TGF-BETA; SMAD PROTEINS;
   TRANSCRIPTIONAL REPRESSION; MESENCHYMAL TRANSITIONS; MUSCLE
   DIFFERENTIATION; INDEPENDENT PATHWAYS; EXTRACELLULAR-MATRIX; TUMOR
   PROGRESSION
AB SnoN is an important negative regulator of transforming growth factor beta signaling through its ability to interact with and repress the activity of Smad proteins. It was originally identified as an oncoprotein based on its ability to induce anchorage-independent growth in chicken embryo fibroblasts. However, the roles of SnoN in mammalian epithelial carcinogenesis have not been well defined. Here we show for the first time that SnoN plays an important but complex role in human cancer. SnoN expression is highly elevated in many human cancer cell lines, and this high level of SnoN promotes mitogenic transformation of breast and lung cancer cell lines in vitro and tumor growth in vivo, consistent with its proposed prooncogenic role. However, this high level of SnoN expression also inhibits epithelial-to-mesenchymal transdifferentiation. Breast and lung cancer cells expressing the shRNA for SnoN exhibited an increase in cell motility, actin stress fiber formation, metalloprotease activity, and extracellular matrix production as well as a reduction in adherens junction proteins. Supporting this observation, in an in vivo breast cancer metastasis model, reducing SnoN expression was found to moderately enhance metastasis of human breast cancer cells to bone and lung. Thus, SnoN plays both protumorigenic and antitumorigenic roles at different stages of mammalian malignant progression. The growth-promoting activity of SnoN appears to require its ability to bind to and repress the Smad proteins, while the antitumorigenic activity can be mediated by both Smad-dependent and Smad-independent pathways and requires the activity of small GTPase RhoA. Our study has established the importance of SnoN in mammalian epithelial carcinogenesis and revealed a novel aspect of SnoN function in malignant progression.
C1 Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
   Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
   Univ Texas, Hlth Sci Ctr, Dept Cell & Struct Biol, San Antonio, TX 78229 USA.
RP Luo, KX (reprint author), Univ Calif Berkeley, Dept Mol & Cell Biol, 16 Barker Hall,Mail Code 3204, Berkeley, CA 94720 USA.
EM kluo@berkeley.edu
OI Berdeaux, Rebecca/0000-0002-9929-1711
FU NCI NIH HHS [R01 CA017542, CA 17542, CA 79683, CA 87940, R01 CA079683,
   R01 CA087940, R37 CA017542]
NR 69
TC 63
Z9 66
U1 0
U2 4
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0270-7306
J9 MOL CELL BIOL
JI Mol. Cell. Biol.
PD JAN
PY 2007
VL 27
IS 1
BP 324
EP 339
DI 10.1128/MCB.01394-06
PG 16
WC Biochemistry & Molecular Biology; Cell Biology
SC Biochemistry & Molecular Biology; Cell Biology
GA 121CX
UT WOS:000243136800026
PM 17074815
ER

PT J
AU Gorostiza, P
   Isacoff, E
AF Gorostiza, Pau
   Isacoff, Ehud
TI Optical switches and triggers for the manipulation of ion channels and
   pores
SO MOLECULAR BIOSYSTEMS
LA English
DT Review
ID LASER-PULSE PHOTOLYSIS; CHEMICAL KINETIC INVESTIGATIONS; MICROSECOND
   TIME REGION; ACETYLCHOLINE-RECEPTOR CHANNELS; IONOTROPIC GLUTAMATE
   RECEPTORS; PHOTOLABILE PROTECTING GROUPS; NUCLEOTIDE-GATED CHANNELS;
   LIGHT-INDUCED ACTIVATION; SINGLE DENDRITIC SPINES; LONG-TERM
   POTENTIATION
AB Like fluorescence sensing techniques, methods to manipulate proteins with light have produced great advances in recent years. Ion channels have been one of the principal protein targets of photoswitched manipulation. In combination with fluorescence detection of cell signaling, this has enabled non-invasive, all-optical experiments on cell and tissue function, both in vitro and in vivo. Optical manipulation of channels has also provided insights into the mechanism of channel function. Optical control elements can be classified according to their molecular reversibility as non-reversible phototriggers where light breaks a chemical bond ( e. g. caged ligands) and as photoswitches that reversibly photoisomerize. Synthetic photoswitches constitute nanoscale actuators that can alter channel function using three different strategies. These include ( 1) nanotoggles, which are tethered photoswitchable ligands that either activate channels (agonists) or inhibit them (blockers or antagonists), ( 2) nanokeys, which are untethered ( freely diffusing) photoswitchable ligands, and ( 3) nanotweezers, which are photoswitchable crosslinkers. The properties of such photoswitches are discussed here, with a focus on tethered photoswitchable ligands. The recent literature on optical manipulation of ion channels is reviewed for the different channel families, with special emphasis on the understanding of ligand binding and gating processes, applications in nanobiotechnology, and with attention to future prospects in the field.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
RP Isacoff, E (reprint author), ICREA, Parc Cient Barcelona,Josep Samitier 1-5, Barcelona 08028, Spain.
EM ehud@berkeley.edu
RI Gorostiza, Pau/Q-2544-2015
OI Gorostiza, Pau/0000-0002-7268-5577
NR 200
TC 43
Z9 45
U1 0
U2 15
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
   ENGLAND
SN 1742-206X
EI 1742-2051
J9 MOL BIOSYST
JI Mol. Biosyst.
PY 2007
VL 3
IS 10
BP 686
EP 704
DI 10.1039/b710287a
PG 19
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 212KK
UT WOS:000249595000013
PM 17882331
ER

PT J
AU Nakhimovsky, L
   Fuchs, R
AF Nakhimovsky, L.
   Fuchs, R.
TI Hypochromism in two low-energy transitions of B-2 (B-2u) symmetry in the
   electronic spectrum of the carbazole crystal
SO MOLECULAR CRYSTALS AND LIQUID CRYSTALS
LA English
DT Article
DE carbazole crystal; hypochromism; oscillator strengths; transmittance
   spectra
ID OPTICAL-PROPERTIES; ABSORPTION-SPECTRA; ANTHRACENE;
   POLY(N-VINYLCARBAZOLE); POLYNUCLEOTIDES; POLYMERS
AB tronic transitions of B-2 (B-2u) symmetry in the carbazole crystal was studied. We have shown that the two lowest-energy transitions of this symmetry exhibit very strong hypochromism-only 22% of the molecular oscillator strength is retained in the crystal spectrum. Polarized transmittance spectra of thin (similar to 0.1 mu) carbazole monocrystals were obtained in the near LW region at normal and oblique incidence of light on the sample. An expression for transmittance as a function of oscillator strengths of the B-2 (B-2u) symmetry electronic transitions in the crystal, and of the angle of incidence of light on the ac face of the crystal, was derived. The experimental oscillator strengths were obtained by fitting the measured transmittance spectra with the derived function. Local field theory was employed to calculate the theoretical values of the oscillator strengths of five individual electronic transitions in the carbazole crystal. The calculations are in agreement with the oscillator strengths sum rule. The theoretically predicted and experimentally obtained values of oscillator strengths of the two lowest B-2 (B-2u) symmetry transitions in the carbazole crystal are in very good agreement.
C1 Iowa State Univ, US Dept Energy, Dept Phys, Ames Lab, Iowa City, IA USA.
RP Nakhimovsky, L (reprint author), Farmingdale State Univ, Dept Phys, 2350 Broadhollow Rd, Farmingdale, NY 11735 USA.
EM linanakh@yahoo.com
NR 33
TC 2
Z9 2
U1 1
U2 4
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1542-1406
J9 MOL CRYST LIQ CRYST
JI Mol. Cryst. Liquid Cryst.
PY 2007
VL 473
BP 87
EP 102
DI 10.1080/16421400701613441
PG 16
WC Crystallography
SC Crystallography
GA 233ZO
UT WOS:000251130500008
ER

PT J
AU Fu, D
   Lu, M
AF Fu, Dax
   Lu, Min
TI The structural basis of water permeation and proton exclusion in
   aquaporins
SO MOLECULAR MEMBRANE BIOLOGY
LA English
DT Review
DE aquaporin; protein structure; mechanisms underlying water permeation;
   membrane protein; membrane permeability
ID CELL CHIP28 PROTEIN; CHANNEL PROTEINS; FUNCTIONAL EXPRESSION;
   MOLECULAR-MECHANISMS; CONDUCTING CHANNEL; ARCHAEAL AQUAPORIN;
   ESCHERICHIA-COLI; DRUG DEVELOPMENT; VOLTAGE-CLAMP; MIP FAMILY
AB Aquaporins ( AQPs) represent a ubiquitous class of integral membrane proteins that play critical roles in cellular osmoregulations in microbes, plants and mammals. AQPs primarily function as water- conducting channels, whereas members of a sub- class of AQPs, termed aquaglyceroporins, are permeable to small neutral solutes such as glycerol. While AQPs facilitate transmembrane permeation of water and/ or small neutral solutes, they preclude the conduction of protons. Consequently, openings of AQP channels allow rapid water diffusion down an osmotic gradient without dissipating electrochemical potentials. Molecular structures of AQPs portray unique features that define the two central functions of AQP channels: effective water permeation and strict proton exclusion. This review describes AQP structures known to date and discusses the mechanisms underlying water permeation, proton exclusion and water permeability regulation.
C1 Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
RP Fu, D (reprint author), Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
EM dax@bnl.gov
FU NIGMS NIH HHS [R01 GM65137]
NR 66
TC 47
Z9 47
U1 3
U2 21
PU INFORMA HEALTHCARE
PI LONDON
PA TELEPHONE HOUSE, 69-77 PAUL STREET, LONDON EC2A 4LQ, ENGLAND
SN 0968-7688
J9 MOL MEMBR BIOL
JI Mol. Membr. Biol.
PY 2007
VL 24
IS 5-6
BP 366
EP 374
DI 10.1080/09687680701446965
PG 9
WC Biochemistry & Molecular Biology; Cell Biology
SC Biochemistry & Molecular Biology; Cell Biology
GA 201SP
UT WOS:000248853200007
PM 17710641
ER

PT J
AU McCabe, C
   Golab, JT
   Cummings, PT
AF McCabe, C.
   Golab, J. T.
   Cummings, P. T.
TI Third Foundations of Molecular Modeling and Simulation Conference FOMMS
   2006 - Semiahmoo Resort, Blaine, WA USA 9-14 July 2006 - Foreword
SO MOLECULAR PHYSICS
LA English
DT Editorial Material
C1 Vanderbilt Univ, Nashville, TN USA.
   INEOS Technol, Naperville, IL USA.
   Oak Ridge Natl Lab, Oak Ridge, TN USA.
RP McCabe, C (reprint author), Vanderbilt Univ, 221 Kirkland Hall, Nashville, TN USA.
RI McCabe, Clare/I-8017-2012; Cummings, Peter/B-8762-2013
OI McCabe, Clare/0000-0002-8552-9135; Cummings, Peter/0000-0002-9766-2216
NR 2
TC 1
Z9 1
U1 0
U2 0
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 JAN-FEB
PY 2007
VL 105
IS 2-3
BP 137
EP 137
DI 10.1080/00268970701227903
PG 1
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 147DU
UT WOS:000244984400001
ER

PT J
AU Bernholc, J
   Lu, W
   Nakhmanson, SM
   Hahn, PH
   Meunier, V
   Nardelli, MB
   Schmidt, WG
AF Bernholc, J.
   Lu, W.
   Nakhmanson, S. M.
   Hahn, P. H.
   Meunier, V.
   Nardelli, M. Buongiorno
   Schmidt, W. G.
TI Atomic scale design of nanostructures
SO MOLECULAR PHYSICS
LA English
DT Article; Proceedings Paper
CT 3rd International Conference on Foundations of Molecular Modeling and
   Simulation (FOMMS)
CY JUL 09-14, 2006
CL Blaine, WA
SP Amer Inst Chem Engineers Computat Mole Sci & Engn Forum
ID NEGATIVE DIFFERENTIAL RESISTANCE; SINGLE-CRYSTALLINE FILMS; AB-INITIO
   CALCULATION; OPTICAL-SPECTRUM; VINYLIDENE FLUORIDE; LIQUID WATER;
   POLY(VINYLIDENE FLUORIDE); FERROELECTRIC POLYMERS; ELECTRONIC-STRUCTURE;
   ORGANIC MONOLAYERS
AB Recent advances in theoretical methods and high performance computing allow for reliable first-principles predictions of complex nanostructured materials and devices. This paper describes three examples: (i) non-equilibrium electron transport through molecular junctions, as a stepping stone for the design of molecular-scale devices and for integration of biomolecules with Si technology; (ii) polarization and piezoelectric properties of PVDF and related polymers; and (iii) the many-body optical spectrum of water. For the molecular junction, our results provide a qualitative picture and quantitative understanding of the mechanism leading to negative differential resistance for a large class of small molecules. For ferroelectric polymers, the calculations show that their polarization is described by cooperative, quantum-mechanical interactions between polymer chains. Nevertheless, the ab initio results lead to a simple parameterization of polarization as a function of copolymer concentration. Finally, our calculations explain the well-known redshift in the fundamental absorption of water as due to exciton delocalization upon aggregation.
C1 N Carolina State Univ, Ctr High Performance Simulat, Raleigh, NC 27695 USA.
   N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA.
   Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
   Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
   Univ Jena, Inst Festkorpertheorie & Opt, D-07743 Jena, Germany.
   Univ Paderborn, D-33095 Paderborn, Germany.
RP Bernholc, J (reprint author), N Carolina State Univ, Ctr High Performance Simulat, Raleigh, NC 27695 USA.
EM bernholc@ncsu.edu
RI Buongiorno Nardelli, Marco/C-9089-2009; Meunier, Vincent/F-9391-2010;
   Nakhmanson, Serge/A-6329-2014; 
OI Meunier, Vincent/0000-0002-7013-179X; Schmidt, Wolf
   Gero/0000-0002-2717-5076
NR 51
TC 3
Z9 3
U1 0
U2 5
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 JAN-FEB
PY 2007
VL 105
IS 2-3
BP 147
EP 156
DI 10.1080/00268970701189186
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 147DU
UT WOS:000244984400003
ER

PT J
AU Leng, YS
   Dyer, PJ
   Krstic, PS
   Harrison, RJ
   Cummings, PT
AF Leng, Y. S.
   Dyer, P. J.
   Krstic, P. S.
   Harrison, R. J.
   Cummings, P. T.
TI Calibration of chemical bonding between benzenedithiolate and gold: the
   effects of geometry and size of gold clusters
SO MOLECULAR PHYSICS
LA English
DT Article; Proceedings Paper
CT 3rd International Conference on Foundations of Molecular Modeling and
   Simulation (FOMMS)
CY JUL 09-14, 2006
CL Blaine, WA
SP Amer Inst Chem Engineers Computat Mole Sci & Engn Forum
ID DENSITY-FUNCTIONAL THEORY; SELF-ASSEMBLED MONOLAYERS; AU(111) SURFACE;
   WAVE-FUNCTIONS; ADSORPTION; MOLECULE; METHYLTHIOLATE; CONDUCTANCE;
   POTENTIALS; SIMULATION
AB The effects of geometry and size of gold clusters on the chemical bonding between benzenedithiolate (BDT) molecule and gold clusters have been evaluated for several different BDT-nAu complexes. The original potentials were developed based on BDT-1, 2 Au complexes (Leng et al., J. Chem. Phys. 122(24), 244721 (2005)). Density functional theory (DFT) calculations are employed to calibrate the bond-stretching behaviour between BDT and gold atoms. It has been found that, to some extent, the shape of bonding curves depends on the gold cluster geometry and size. This is particularly obvious for the on-top bonding case. However this effect does not alter molecular packing structure on Au (111) surface and has only a minor effect on local bonding geometry. The Mulliken charge distribution at the bonding interface (i.e. among bonded atoms) also does not show any impact on the global packing structure. The pure chemical bonding, which was derived from the total DFT energy subtracting the non-bonded terms, dominates the local bonding behaviour between BDT molecules and Au clusters.
C1 Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA.
   Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37871 USA.
   Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA.
   Oak Ridge Natl Lab, Nanomat Theory Inst, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Leng, YS (reprint author), Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA.
EM yongsheng.leng@vanderbilt.edu
RI Cummings, Peter/B-8762-2013
OI Cummings, Peter/0000-0002-9766-2216
NR 38
TC 7
Z9 7
U1 0
U2 7
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 JAN-FEB
PY 2007
VL 105
IS 2-3
BP 293
EP 300
DI 10.1080/00268970601149298
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 147DU
UT WOS:000244984400016
ER

PT J
AU Mcgrath, MJ
   Siepmann, JI
   Kuo, IFW
   Mundy, CJ
AF Mcgrath, M. J.
   Siepmann, J. I.
   Kuo, I.-F. W.
   Mundy, C. J.
TI Spatial correlation of dipole fluctuations in liquid water
SO MOLECULAR PHYSICS
LA English
DT Article
ID SPACE GAUSSIAN PSEUDOPOTENTIALS; DENSITY-FUNCTIONAL THEORY;
   MOLECULAR-DYNAMICS; 1ST PRINCIPLES; AB-INITIO; VAPOR INTERFACE;
   SUPERCRITICAL CONDITIONS; ELECTRONIC-PROPERTIES; PHASE-EQUILIBRIA;
   CONDENSED PHASES
AB The molecular dipole moments and local environments of water in its liquid phase were examined for a series of first-principles Gibbs ensemble Monte Carlo simulations along the vapour-liquid coexistence curve using the Becke-Lee-Yang-Parr (BLYP) and Perdew Burke-Ernzerhof (PBE) exchange/ correlation density functionals. Molecular dipole moments were computed using maximally localized Wannier functions with the Berry phase scheme, while the structure was analysed with respect to tetrahedral order parameter and hydrogen bonding. Increasing the temperature results in a decrease of both the average molecular dipole moment and the local structure, although the width of the dipole distribution remains fairly constant. A correlation is found between the extent of the local structure and the magnitude of the molecular dipole moment, but this correlation is limited to the first solvation shell.
C1 Univ Minnesota, Dept Chem, Minneapolis, MN 55455 USA.
   Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA.
   Lawrence Livermore Natl Lab, Chem Mat & Sci Directorate, Livermore, CA 94550 USA.
   Pacific NW Natl Lab, Div Mat & Chem Sci, Richland, WA 99352 USA.
RP Siepmann, JI (reprint author), Univ Minnesota, Dept Chem, 207 Pleasant St SE, Minneapolis, MN 55455 USA.
EM siepmann@chem.umn.edu
NR 65
TC 12
Z9 13
U1 0
U2 13
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0026-8976
EI 1362-3028
J9 MOL PHYS
JI Mol. Phys.
PY 2007
VL 105
IS 10
BP 1411
EP 1417
DI 10.1080/00268970701364938
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 199IP
UT WOS:000248689700011
ER

PT J
AU Fan, H
   Harding, LB
   Pratt, ST
AF Fan, H.
   Harding, L. B.
   Pratt, S. T.
TI Dissociative ionization of hot C3H5 radicals
SO MOLECULAR PHYSICS
LA English
DT Article
DE photoionization; photodissociation; dissociative photoionization;
   radicals
ID 193 NM PHOTODISSOCIATION; RESOLUTION PHOTOELECTRON-SPECTROSCOPY;
   PHOTO-ION COINCIDENCE; CL BOND FISSION; ALLYL CHLORIDE; THRESHOLD
   PHOTOELECTRON; PHOTOIONIZATION MASS; AB-INITIO; DYNAMICS; PROPYNE
AB The combination of ultraviolet ( uv) photodissociation, vacuum-ultraviolet ( vuv) photoionization, and velocity-map ion imaging is used to explore the dissociative ionization of allyl and 2-propenyl C3H5 radicals that have significant amounts of internal energy. The effect of the internal energy of the radicals on the fragmentation dynamics of the parent photoion is first discussed for the general case, and then for the specific C3H5 radicals. The results are relevant to an increasing number of studies in which single-photon vuv photoionization is used as a 'soft' ionization method for radicals produced in photodissociation and reactive scattering experiments, as well as in reactive environments such as flames and plasmas.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
RP Pratt, ST (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM stpratt@anl.gov
NR 61
TC 3
Z9 3
U1 0
U2 11
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.
PY 2007
VL 105
IS 11-12
BP 1517
EP 1534
DI 10.1080/00268970701266794
PG 18
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 215AV
UT WOS:000249780600006
ER

PT J
AU Perrin, A
   Bertseva, E
   Flaud, JM
   Collet, D
   Burger, H
   Masiello, T
   Blake, TA
AF Perrin, A.
   Bertseva, E.
   Flaud, J.-M.
   Collet, D.
   Burger, H.
   Masiello, T.
   Blake, T. A.
TI High resolution infrared study of the 2v(9) and v(4) bands of
   (BF2OH)-B-10 and (BF2OH)-B-11: evidence of large amplitude effects for
   the OH-torsion and OH-bending modes in the 9(2) and 4(1) excited states
SO MOLECULAR PHYSICS
LA English
DT Article
ID NITRIC-ACID; WATER DIMER; ROTATIONAL SPECTRUM; VIBRATIONAL-STATES; LINE
   POSITIONS; HNO3; MICROWAVE; SPECTROSCOPY; INTENSITIES; MILLIMETER
AB High resolution (2-3 x 10(-3) cm(-1)) Fourier transform infrared spectra of gas phase B-10 and B-11 enriched and natural samples of BF2OH (difluoroboric acid) were recorded at Wuppertal and Richland. Starting from the results of previous studies, it was possible to perform the first rovibrational analysis of the 2v(9) (first overtone of v(9), the OH torsion) and v(4) (BOH bending) bands located at about 1043.9 and 961.7 cm(-1) and 1042.9 and 961.5 cm(-1) for the (BF2OH)-B-10 and (BF2OH)-B-11 isotopic species, respectively. Numerous ' classical' perturbations were observed in the analysis of the 2v(9) and v(4) bands. The energy levels of the 9(2) bright state are indeed involved in a B-type Coriolis resonance with those of the 6(1)9(1) dark state. The 4(1) levels are perturbed by a B-type Coriolis resonance and by an anharmonic resonance with the levels of the 7(1)9(1) and the 6(1)7(1) dark states, respectively. In addition large amplitude effects were observed for the 2 v (9) and also, more surprisingly, the v(4) bands. This results in splittings of the energy levels of about 0.005 and 0.0035 cm(-1) for the 9(2) and 4(1) states, respectively, which are easily observable in the P and R branches for both bands. The theoretical model used to reproduce the experimental levels accounts for the classical vibration-rotation resonances. Also the large amplitude torsional (or bending) effects are accounted for within the frame of the IAM (Internal Axis Method)-like approach. The Coriolis resonances between the two torsional (or bending) substates are taken into account by {J(x), J(z)} non orthorhombic terms in the v-diagonal blocks. This means that the z-quantification axis deviates from the a inertial axis by an axis switching effect of similar to 35 degrees for the {9(2), 6(1) 9(1)} system and of similar to 16.6 degrees for the {4(1), 7(1) 9(1), 6(1)7(1)} system of interacting vibrational states. The calculation of the relative line intensities for the 2v (9) and v(4) bands accounts for these axis switching effects as well as for the intensity alternation which is due to the nuclear spin statistical weights since the OH large amplitude torsion and/ or bending motion results indeed in an exchange of the two fluorine nuclei.
C1 Univ Paris 12, CNRS, LISA, F-94010 Creteil, France.
   Univ Paris 07, F-94010 Creteil, France.
   Univ Wuppertal, FBC, D-42097 Wuppertal, Germany.
   Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Perrin, A (reprint author), Univ Paris 12, CNRS, LISA, 61 Av Gen Gaulle, F-94010 Creteil, France.
EM perrin@lisa.univ-paris12.fr
NR 25
TC 3
Z9 3
U1 0
U2 2
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.
PY 2007
VL 105
IS 13-14
BP 1833
EP 1848
DI 10.1080/00268970701426992
PG 16
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 223FZ
UT WOS:000250356400007
ER

PT J
AU Steele, RP
   Head-Gordon, M
AF Steele, Ryan P.
   Head-Gordon, Martin
TI Dual-basis self-consistent field methods: 6-31G*calculations with a
   minimal 6-4G primary basis
SO MOLECULAR PHYSICS
LA English
DT Article
DE dual-basis; density functional theory; Hartree-Fock; self-consistent
   field theory; geometry optimization; 6-31G*; B3LYP; EDF1; minimal basis;
   harmonic frequencies
ID MOLECULAR-ORBITAL METHODS; ELECTRONIC-STRUCTURE CALCULATIONS;
   DENSITY-FUNCTIONAL THEORY; GAUSSIAN-BASIS SETS; LINEAR SCALING
   COMPUTATION; CORRELATED WAVE-FUNCTIONS; AUXILIARY BASIS-SETS;
   QUANTUM-CHEMISTRY; EXPANSION METHODS; MOLLER-PLESSET
AB The feasibility of the strongest possible dual-basis approximation to polarized valence double zeta Hartree-Fock and density functional theory calculations is explored. Specifically, to approximate 6-31G* and 6-31+G* calculations, a minimal 6-4G basis is constructed from 6-31G exponents. The self-consistent field calculation is performed in this minimal basis, followed by a single diagonalization step in the target basis. Statistical errors in atomization energies, molecular structures, and harmonic frequencies approach those of the target basis for HF, B3LYP and EDF1, and are far superior to calculations that do not include polarization functions. Speedups of approximately 5-10 are obtained for the energy, with speedups of 2-3 for the gradient, using existing algorithms, with significant potential for future improvements.
C1 [Steele, Ryan P.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Head-Gordon, Martin] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Steele, RP (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM ofer4@bastille.cchem.berkeley.edu
NR 46
TC 17
Z9 17
U1 0
U2 5
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.
PY 2007
VL 105
IS 19-22
BP 2455
EP 2473
DI 10.1080/00268970701519754
PG 19
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 242UH
UT WOS:000251751200003
ER

PT J
AU Shepard, R
   Minkoff, M
AF Shepard, Ron
   Minkoff, Michael
TI Some comments on the DIIS method
SO MOLECULAR PHYSICS
LA English
DT Article
DE DIIS; least squares; optimization
ID ITERATIVE SUBSPACE; DIRECT INVERSION; CONVERGENCE ACCELERATION; GEOMETRY
   OPTIMIZATION
AB Over twenty ways to solve the DIIS equation are introduced and discussed. Some of these solution methods are inherently inaccurate and are never recommended, others have some efficiency or accuracy advantages that may be exploited in different situations. Two of these ways, linear least squares with substitution and elimination, and linear least squares with equality constraint, have the potential to produce solutions that are significantly more accurate than the traditional normal equation solutions. The choice of the most accurate solution approach for a given problem depends on various vector and matrix norm relations which are discussed. The advantage of one of these methods is demonstrated on a model problem, which has a closed-form solution. A simple geometrical interpretation is given for the DIIS method that involves minimization of a function value within a particular multidimensional plane.
C1 [Shepard, Ron; Minkoff, Michael] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
RP Shepard, R (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM Shepard@tcg.anl.gov
NR 20
TC 6
Z9 6
U1 0
U2 14
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.
PY 2007
VL 105
IS 19-22
BP 2839
EP 2848
DI 10.1080/00268970701691611
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 242UH
UT WOS:000251751200036
ER

PT J
AU Hoover, CG
   Hoover, WG
AF Hoover, Carol G.
   Hoover, Wm. G.
TI Surface tension and strength in SPAM (smooth particle applied mechanics)
SO MOLECULAR SIMULATION
LA English
DT Article; Proceedings Paper
CT Symposium on Progress and Future Prospects in Molecular Dynamics
   Simulation
CY JUN 06-08, 2006
CL Keio Univ, Yokohama, JAPAN
HO Keio Univ
DE SPAM; continuum methods; surface tension; strength
AB Molecular dynamics is limited to small-size short-time situations in which the interparticle forces are known. Continuum mechanics applies at the time and distance scales relevant to men. Smooth particle applied mechanics (SPAM) is a simple, transparent, and flexible approach to solving continuum mechanics problems with particles. Here we point out cures for some of the maladies afflicting a straightforward implementation of SPAM. We present some example simulations to emphasize the intrinsic simplicity, utility, and appeal of the method.
C1 Great Basin Coll, HiTech Ctr, Elko, NV 89801 USA.
   Lawrence Livermore Natl Lab, Methods Dev Grp, Livermore, CA 94551 USA.
RP Hoover, CG (reprint author), Highway Contract 60,Box 565, Ruby Valley, NV 89833 USA.
EM hoover1carol@yahoo.com
NR 6
TC 1
Z9 1
U1 1
U2 3
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0892-7022
J9 MOL SIMULAT
JI Mol. Simul.
PD JAN-FEB
PY 2007
VL 33
IS 1-2
BP 61
EP 64
DI 10.1080/08927020601052864
PG 4
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 145DA
UT WOS:000244844300009
ER

PT J
AU Wang, M
   Liu, J
   Chen, S
AF Wang, M.
   Liu, J.
   Chen, S.
TI Similarity of electroosmotic flows in nanochannels
SO MOLECULAR SIMULATION
LA English
DT Article
DE electroosmotic flow; molecular dynamics; similarity; embedding method
ID MOLECULAR-DYNAMICS SIMULATION; TRANSPORT; DEVICES; SOLIDS; IONS
AB This paper investigates the similarity of electroosmotic flows in nanochannels numerically using the NEMD method and therefore analyzes the applicability of the embedding technique. The results indicate that the near-wall ion distribution is greatly influenced by the wall charge density, the ion arrangement and the interaction between ions and walls. If all these factors are same, the electroosmotic flows in different channel sizes are of similarity, which is to say that the ion distributions close to walls are same and the velocities across the channel are similar. The embedding method is available once the similarity holds. One can predict the ion distributions and fluid flow in larger channels using the continuum equations by introducing MD results of near-wall effective potential or transport coefficients of smaller channels. The results also suggest the similarity is preferred to the channel size larger than 10 times diameter of fluid molecules.
C1 Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA.
   Univ Calif Davis, Dept Biol & Agr Engn, Davis, CA 95616 USA.
   Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
   Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Wang, M (reprint author), Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA.
EM mmwang@ucdavis.edu
RI Chen, Shiyi/A-3234-2010; Wang, Moran/A-1150-2010
NR 25
TC 18
Z9 19
U1 0
U2 6
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0892-7022
J9 MOL SIMULAT
JI Mol. Simul.
PY 2007
VL 33
IS 3
BP 239
EP 244
DI 10.1080/08927020601096804
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 145XE
UT WOS:000244898300003
ER

PT J
AU Chaudhuri, S
   Muckerman, JT
AF Chaudhuri, S.
   Muckerman, J. T.
TI Catalytic activity of Ti-doped NaH nanoclusters towards hydrogenation of
   terminal alkenes
SO MOLECULAR SIMULATION
LA English
DT Article
DE DFT; nanoscale; catalysis; first-principles; alkene
ID ZIEGLER-NATTA CATALYST; MOLECULAR ADSORPTION; CHEMISORPTION; SURFACES;
   PD(111); 1ST-PRINCIPLES; PD-ML/RE(0001); FUNCTIONALS; OVERLAYERS;
   ETHYLENE
AB The reported activity of nanoscale NaH and titanocene towards catalytic reduction of terminal alkenes using molecular hydrogen is surprising considering that both NaH bulk and titanocene are inactive by themselves. In this work, the role of Ti dopants, the importance of NaH nanoclusters and role of the solvent (THF) and cocatalyst (titanocene) are investigated using density functional theory techniques. A plausible mechanism is proposed to explain the origin of the selective catalytic activity. A step-by-step reaction pathway starting with hydrogen chemisorption near the titanium atoms on the NaH nanoparticle surface followed by the reaction of the activated hydrogen with terminal alkenes via a five-membered ring intermediate are discussed.
C1 Brookhaven Natl Lab, Ctr Funct Nanomat, Dept Chem, Upton, NY 11973 USA.
RP Chaudhuri, S (reprint author), Brookhaven Natl Lab, Ctr Funct Nanomat, Dept Chem, Upton, NY 11973 USA.
EM chaudhuri@wsu.edu
RI Muckerman, James/D-8752-2013
NR 27
TC 0
Z9 0
U1 2
U2 5
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0892-7022
J9 MOL SIMULAT
JI Mol. Simul.
PY 2007
VL 33
IS 11
BP 919
EP 924
DI 10.1080/08927020701502024
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 234HT
UT WOS:000251152500004
ER

PT J
AU Tao, Z
   Cummings, PT
AF Tao, Z.
   Cummings, P. T.
TI Molecular dynamics simulation of inorganic ions in PEO aqueous solution
SO MOLECULAR SIMULATION
LA English
DT Article
DE Li; PEO; water; simulations; polarizability
AB Solid polymer electrolytes (SPEs), especially the ones dissolving lithium ions in poly ethylene oxide (PEO) polymer by the bonds between ether oxygen and cations, have long been investigated with the goals of developing batteries with high energy density. It has been accepted that most ions move through the amorphous polymer phase and their mobility depends crucially on the solution environment, though the detailed transport mechanism is not fully developed. Recently, ternary mixtures composed of PEO/salts in aqueous solution have been shown to display more attractive properties than binary SPE mixtures. Numerous experiments have found a dramatically changed environment for the cations and increased ionic conductivity of polymer/salts electrolytes for increased relative humidity, suggesting that the coupling between polymer chains and cations may be weakened due to the existence of water molecules. In this paper we report molecular dynamics ( MD) simulation, using an optimized force field that includes polarizabilities via the dynamic shell model, to study the structural properties of inorganic ions in PEO aqueous solution and the competitive solvation of ions between water and polymer oxygen. Our simulation results show that ions are solvated more favorably by water than by polymer. This conclusion is in a good agreement with neutron diffraction by isotropic substitution (NDIS) experiments.
C1 Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA.
   Nanomat Theory Inst, Ctr Nanophase Mat Sci, Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Tao, Z (reprint author), Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA.
EM zhi.tao@vanderbilt.edu
RI Cummings, Peter/B-8762-2013
OI Cummings, Peter/0000-0002-9766-2216
NR 23
TC 6
Z9 6
U1 0
U2 8
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0892-7022
J9 MOL SIMULAT
JI Mol. Simul.
PY 2007
VL 33
IS 15
BP 1255
EP 1260
DI 10.1080/08927020701697691
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 238AW
UT WOS:000251420700009
ER

PT S
AU Peng, F
   Brown, EF
   Truran, JW
AF Peng, Fang
   Brown, Edward F.
   Truran, James W.
BE Antonelli, LA
   Israel, GL
   Piersanti, L
   Tornambe, A
TI Type I X-ray bursts at low accretion rates
SO MULTICOLORED LANDSCAPE OF COMPACT OBJECTS AND THEIR EXPLOSIVE ORIGINS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Conference on Multicolored Landscape of Compact Objects and Their
   Explosive Origins
CY JUN 11-18, 2006
CL Cefalu, ITALY
SP Natl Inst Astrophys, Astron Observ Rome, Astron Observ Teramo, Astron Observ Cagliari, Univ Palermi, Dept Phys & Astron Sci, MIUR, Cefalu Local Council, Fond Mandralisca
DE diffusion; stars : neutron; X-rays : binaries; X-rays : bursts
ID NEUTRON-STAR ATMOSPHERES; TRANSIENTS; ENVELOPES; DIFFUSION; EVOLUTION;
   MODEL
AB Neutron stars, with their strong surface gravity, have interestingly short timescales for the sedimentation of heavy elements. Recent observations of unstable thermonuclear burning (observed as X-ray bursts) on the surfaces of slowly accreting neutron stars (< 0.01 of the Eddington rate) motivate us to examine bow sedimentation of CNO isotopes affects the ignition of these bursts. We further estimate the burst development using a simple one-zone model with a full reaction network. We report a region of mass accretion rates for weak H flashes. Such flashes can lead to a large reservoir of He, the unstable burning of which may explain some observed long bursts (duration similar to 1000s).
C1 [Peng, Fang] CALTECH, Pasadena, CA 91125 USA.
   [Brown, Edward F.] Michigan State Univ, Dept Phys & Astronomy, E Lansing, MI 48824 USA.
   [Truran, James W.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   [Truran, James W.] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
RP Peng, F (reprint author), CALTECH, Pasadena, CA 91125 USA.
OI Brown, Edward/0000-0003-3806-5339
FU <bold>J</bold>oint <bold>I</bold>nstitute for <bold>N</bold>uclear
   <bold>A</bold>strophysics under NSF-PFC [PHY 02-16783]; Department of
   Energy [B523820]; Center for Astrophysical Thermonuclear Flashes at the
   University of Chicago; NSF [AST-0507456]; U.S. DOE [W-31-109-ENG-38]
FX This work is supported in part by the <BOLD>J</BOLD>oint
   <BOLD>I</BOLD>nstitute for <BOLD>N</BOLD>uclear
   <BOLD>A</BOLD>strophysics under NSF-PFC grant PHY 02-16783, and by the
   Department of Energy under grant B523820 to the Center for Astrophysical
   Thermonuclear Flashes at the University of Chicago. EB is supported by
   the NSF under grant AST-0507456; JWT acknowledges support from the U.S.
   DOE, under contract No. W-31-109-ENG-38.
NR 22
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0434-2
J9 AIP CONF PROC
PY 2007
VL 924
BP 513
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BGW72
UT WOS:000250989500006
ER

PT S
AU Barnard, R
   Trudolyubov, S
   Haswell, CA
   Kolb, UC
   Osborne, JP
   Priedhorsky, WH
AF Barnard, R.
   Trudolyubov, S.
   Haswell, C. A.
   Kolb, U. C.
   Osborne, J. P.
   Priedhorsky, W. H.
BE Antonelli, LA
   Israel, GL
   Piersanti, L
   Tornambe, A
TI Artificial variability in XMM-Newton observations of X-ray sources: M31
   as a case study
SO MULTICOLORED LANDSCAPE OF COMPACT OBJECTS AND THEIR EXPLOSIVE ORIGINS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Conference on Multicolored Landscape of Compact Objects and Their
   Explosive Origins
CY JUN 11-18, 2006
CL Cefalu, ITALY
SP Natl Inst Astrophys, Astron Observ Rome, Astron Observ Teramo, Astron Observ Cagliari, Univ Palermi, Dept Phys & Astron Sci, MIUR, Cefalu Local Council, Fond Mandralisca
DE xrays : binaries; galaxies : individual : M31
ID M-31
AB Power density spectra (PDS) that are characteristic of low mass X-ray binaries (LMXBs) have been previously reported for M31 X-ray sources observed by XMM-Newton. However, we have recently discovered that these PDS are false positives resulting from the improper manipulation of non-simultaneous liglitcurves. The lightcurves produced by the XMM-Newton Science Analysis Software (SAS) are non-synchronised by default. This affects not only the combination of lightcurves from the three EPIC detectors (MOS1, MOS2 and pn), but also background subtraction in the same CCD. It is therefore imperative that all SAS-generated lightcurves are synchronised by time filtering, even if the whole observation is to be used. We combined simulated lightcurves at various intensities with various offsets and found that the artefact is more dependent on the offset than the intensity. While previous timing results from M31 have been proven wrong, and also the broken power law PDS in NGC 4559 ULX-7, XMM-Newton was able to detect aperiodic variability in just 3 ks of observations of NGC 5408 ULX1. Hence XMM-Newton remains a viable tool for analysing variability in extra-galactic X-ray sources.
C1 [Barnard, R.; Haswell, C. A.; Kolb, U. C.] Open Univ, Walton Hall, Milton Keynes MK7 6AA, Bucks, England.
   [Trudolyubov, S.] Univ Calif Riverside, Inst Geophys & Planetary Phys, Riverside, CA 92521 USA.
   [Osborne, J. P.] Univ Leicester, Leicester LE1 7RH, Leics, England.
   [Priedhorsky, W. H.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Barnard, R (reprint author), Open Univ, Walton Hall, Milton Keynes MK7 6AA, Bucks, England.
OI Priedhorsky, William/0000-0003-0295-9138
FU PPARC; NASA [NAG5-12390]
FX Power density spectra were fitted using fitpowspec, provided by P.J.
   Humphrey. R.B is funded by PPARC, S.T is supported by NASA grant
   NAG5-12390.
NR 16
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0434-2
J9 AIP CONF PROC
PY 2007
VL 924
BP 691
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BGW72
UT WOS:000250989500032
ER

PT S
AU Lim, SH
   Caster, AG
   Leone, SR
AF Lim, Sang-Hyun
   Caster, Allison G.
   Leone, Stephen R.
BE Periasamy, A
   So, PTC
TI Single pulse interferometric coherent anti-Stokes Raman scattering
   (CARS) - art. no. 644205
SO Multiphoton Microscopy in the Biomedical Sciences VII
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Multiphoton Microscopy in the Biomedical Sciences VII
CY JAN 21-23, 2007
CL San Jose, CA
SP SPIE, Carl Zeiss Inc, Chroma Technol Corp, Coherent, High Q Laser, Newport Spectra Phys
DE cARS; spectral interferometry; homodyne amplification; pulse shaping
ID SPECTRAL INTERFEROMETRY; MICROSCOPY; SPECTROSCOPY
AB The non-resonant background signal has been the major obstacle in coherent anti-Stokes Raman scattering (CARS) spectroscopy and microscopy. This unwanted background is generated by the electronic response of the sample. It not only obscures the desired signal but also results in spectral interference with the desired vibrationally resonant CARS signal, making it difficult to assign vibrational peaks using characteristic spontaneous Raman spectra. We show that the non-resonant background can be used as a local oscillator for spectral interferometric CARS spectroscopy. Two different techniques are discussed to extract the vibrationally resonant multiplex CARS spectrum and discriminate it against the much larger non-resonant background. The pump, Stokes and probe pulses are all selected inside a single broadband ultrafast pulse (bandwidth similar to 1800 cm(-1)) by a phase- and/or polarization-controlled pulse-shaping technique. The first technique generates two spectral interference CARS signals simultaneously, and the normalized difference of these two signals provides an amplified background-free broadband resonant CARS spectrum over 400-1500 cm(-1). The second method generates a single spectral interference CARS signal by a phase-only pulse shaping. A Fourier transform spectral interferometry (FTSI) method is used to retrieve the Raman-equivalent CARS spectrum from the measured spectral signal. Both methods enhance the resonant CARS signal by utilizing the non-resonant background as a local oscillator for homodyne mixing.
C1 Univ Calif Berkeley, Dept Chem & Phys, Lawrence Berkeley Lab, Berkeley, CA USA.
RP Lim, SH (reprint author), Univ Calif Berkeley, Dept Chem & Phys, Lawrence Berkeley Lab, Berkeley, CA USA.
NR 20
TC 0
Z9 0
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6555-9
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6442
BP 44205
EP 44205
AR 644205
DI 10.1117/12.699144
PG 10
WC Engineering, Biomedical; Microscopy; Optics
SC Engineering; Microscopy; Optics
GA BGG04
UT WOS:000246520500001
ER

PT S
AU Hall, LO
   Banfield, RE
   Bowyer, KW
   Kegelmeyer, WP
AF Hall, Lawrence O.
   Banfield, Robert E.
   Bowyer, Kevin W.
   Kegelmeyer, W. Philip
BE Haindl, M
   Kittler, J
   Roli, F
TI Boosting lite - Handling larger datasets and slower base classifiers
SO MULTIPLE CLASSIFIER SYSTEMS, PROCEEDINGS
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 7th International Workshop on Multiple Classifier Systems
CY MAY 23-25, 2007
CL Prague, CZECH REPUBLIC
SP Int Assoc Pattern Recognit, EU IST FP6 BioSecure Network Excellence, EU IST FP6 MUSCLE Network Excellence, Univ Surrey, Ctr Vis, Speech & Signal Proc, Univ Cagliari, Dept Elect & Elect Engn, Acad Sci Czech Republic, Inst Informat Theory & Automat
DE classifier ensembles; boosting; support vector machines; decision trees
AB In this paper, we examine ensemble algorithms (Boosting Lite and Ivoting) that provide accuracy approximating a single classifier, but which require significantly fewer training examples. Such algorithms allow ensemble methods to operate on very large data sets or use very slow learning algorithms. Boosting Lite is compared with Ivoting, standard boosting, and building a single classifier. Comparisons are done on 11 data sets to which other approaches have been applied. We find that ensembles of support vector machines can attain higher accuracy with less data than ensembles of decision trees. We find that Ivoting may result in higher accuracy ensembles on some data sets, however Boosting Lite is generally able to indicate when boosting will increase overall accuracy.
C1 [Hall, Lawrence O.; Banfield, Robert E.] Univ S Florida, Dept Comp Sci & Engn, Tampa, FL 33620 USA.
   [Bowyer, Kevin W.] Comp Sci & Engn, Notre Dame, IN 46556 USA.
   [Kegelmeyer, W. Philip] Sandia Natl Labs, Comp Sci & Math Res Dept, Livermore, MS USA.
RP Hall, LO (reprint author), Univ S Florida, Dept Comp Sci & Engn, Tampa, FL 33620 USA.
EM hall@csee.usf.edu; rbanfiel@csee.usf.edu; wpk@sandia.gov
OI Bowyer, Kevin/0000-0002-7562-4390
FU Department of Energy Through the ASCI PPPE Data Discovery Program
   [DE-AC04-76DO00789]
FX This research was partially supported by the Department of Energy
   through the ASCI PPPE Data Discovery Program, Contract
   number:DE-AC04-76DO00789.
NR 12
TC 2
Z9 2
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-72481-0
J9 LECT NOTES COMPUT SC
PY 2007
VL 4472
BP 161
EP +
PG 3
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
   Methods
SC Computer Science
GA BGG41
UT WOS:000246659200017
ER

PT S
AU Hinton, TG
   Aizawa, K
AF Hinton, Thomas G.
   Aizawa, Kouichi
BE Mothersill, C
   Mosse, I
   Seymour, C
TI A layperson's primer on multiple stressors
SO MULTIPLE STRESSORS: A CHALLENGE FOR THE FUTURE
SE NATO Science for Peace and Security Series C-Environmental Security
LA English
DT Proceedings Paper
CT NATO Advanced Research Workshop on Multipollution Exposure and Risk
   Assessment
CY OCT 01-05, 2006
CL Minsk, BYELARUS
SP NATO
DE interactions; mixed stressors; multiple contaminants; effects
ID MEDAKA ORYZIAS-LATIPES; ECOLOGICAL RISK-ASSESSMENT; CHEMICAL-MIXTURES;
   HUMAN HEALTH; CONTAMINANTS; PERSPECTIVE; ZEBRAFISH; TOXICITY; EXPOSURE;
   MODEL
AB This article introduces the concept of multiple stressors. It has been written for the layperson, in terms that do not require a strong scientific background. It has been written to facilitate scientists' communication with the public and funding agencies about multiple stressors. This article briefly explains several major classes of contaminants whose global dispersal and long-term persistence in the environment might cause them to contribute to multiple stressors. Highlighted is our lack of understanding about the potential interactions among multiple stressors and the need for much additional research. Interactions are explained through a simple example of various plausible responses that an organism might exhibit when exposed to both cadmium and radiation. Our current approach for determining human and ecological risks from contaminants is explained such that the reader is aware of why multiple stressor research is needed. This article stresses the need for a coordinated, multinational, multidisciplinary research plan for multiple stressors.
C1 [Hinton, Thomas G.; Aizawa, Kouichi] Univ Georgia, Savannah River Ecol Lab, Aiken, SC USA.
RP Hinton, TG (reprint author), Univ Georgia, Savannah River Ecol Lab, Aiken, SC USA.
EM thinton@srel.edu
FU Environmental Remediation Sciences Division of the Office of Biological
   and Environmental Research; U.S. Department of Energy through the
   Financial Assistant Award [DE-FC09-96SR18546]
FX Compilation of this review was supported in part by the Environmental
   Remediation Sciences Division of the Office of Biological and
   Environmental Research, U.S. Department of Energy through the Financial
   Assistant Award DE-FC09-96SR18546 to the University of Georgia Research
   Foundation. Suggestions made on a draft version of the manuscript by Yi
   Yi and Daniel Coughlin of the Savannah River Ecology Laboratory were
   much appreciated.
NR 43
TC 4
Z9 4
U1 2
U2 6
PU SPRINGER
PI DORDRECHT
PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS
SN 1871-4668
BN 978-1-4020-6333-6
J9 NATO SCI PEACE SECUR
JI NATO Sci. Peace Secur. Ser. C- Environ. Secur.
PY 2007
BP 57
EP +
DI 10.1007/978-1-4020-6335-0_5
PG 4
WC Ecology; Environmental Sciences
SC Environmental Sciences & Ecology
GA BGT27
UT WOS:000250404900005
ER

PT S
AU Sun, YN
   Barabash, R
   Choo, H
   Liaw, PK
   Lu, YL
   Brown, DW
   Ice, GE
AF Sun, Yinan
   Barabash, Rozaliya
   Choo, Hahn
   Liaw, Peter K.
   Lu, Yulin
   Brown, Donald W.
   Ice, Gene. E.
BE Kozubski, R
   Murch, GE
   Zieba, P
TI Mutiscale plastic deformation near a fatigue crack from diffraction
SO Multiscale Kinetic Modelling of Materials
SE SOLID STATE PHENOMENA
LA English
DT Proceedings Paper
CT Symposium on Multiscale Kinetic Modelling of Materials held at the 2006
   E-MRS Fall Meeting
CY SEP 04-08, 2006
CL Warsaw, POLAND
SP European Mat Res Soc, Polish Mat Sci Soc, Warsaw Univ Technol, Polish Acad Sci, Inst Phys, Polish Acad Sci, Inst High Pressure Phys, AMAS-ISN Int Sci Network Adv Mat & Structures
DE neutron diffraction; x-ray microbeam; crack; fatigue
ID NEUTRON-DIFFRACTION; MICRODIFFRACTION; CRYSTALS; TIP
AB After an overload was imposed during a constant amplitude fatigue experiment, a retardation period was observed. The deformation in the vicinity of a crack tip was studied using neutron and x-ray microbeam-diffraction techniques, which provide millimeter and submicrometer spatial resolutions, respectively. From the neutron-diffraction measurements, compressive lattice strains and higher dislocation densities at the macroscale were observed in front of the crack tip, which indicates a plasticity induced crack-closure phenomenon. Furthermore, Laue patterns obtained from the microbeam, diffraction at different locations near the crack tip show alternating regions with high and low dislocation densities at the mesoscale.
C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
   Univ Tennessee, Ctr Mat Proc, Knoxville, TN 37996 USA.
   Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
RP Sun, YN (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
RI Choo, Hahn/A-5494-2009
OI Choo, Hahn/0000-0002-8006-8907
NR 14
TC 3
Z9 3
U1 1
U2 3
PU TRANS TECH PUBLICATIONS LTD
PI STAFA-ZURICH
PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
SN 1012-0394
BN 978-3-9084-5139-6
J9 SOL ST PHEN
PY 2007
VL 129
BP 151
EP 156
PG 6
WC Materials Science, Multidisciplinary; Physics, Applied; Physics,
   Condensed Matter
SC Materials Science; Physics
GA BGM81
UT WOS:000248526300021
ER

PT B
AU Moldovan, D
   Wolf, D
AF Moldovan, D.
   Wolf, D.
BE Guo, ZX
TI Mesoscale modelling of grain growth and microstructure in
   polycrystalline materials
SO MULTISCALE MATERIALS MODELLING: FUNDAMENTALS AND APPLICATIONS
SE Woodhead Publishing in Materials
LA English
DT Article; Book Chapter
ID MOLECULAR-DYNAMICS SIMULATION; BOUNDARY DIFFUSION CREEP;
   COMPUTER-SIMULATION; NANOCRYSTALLINE MATERIALS; VARIATIONAL APPROACH;
   FCC METALS; THIN-FILMS; SOAP FROTH; DEFORMATION; MIGRATION
C1 [Moldovan, D.] Louisiana State Univ, Dept Mech Engn, Baton Rouge, LA 70803 USA.
   [Wolf, D.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Moldovan, D (reprint author), Louisiana State Univ, Dept Mech Engn, 2504 CEBA Bldg, Baton Rouge, LA 70803 USA.
EM moldovan@me.lsu.edu
NR 73
TC 0
Z9 0
U1 0
U2 1
PU WOODHEAD PUBL LTD
PI CAMBRIDGE
PA ABINGTON HALL ABINGTON, CAMBRIDGE CB1 6AH, CAMBS, ENGLAND
BN 978-1-84569-337-4; 978-1-84569-071-7
J9 WOODHEAD PUBL MATER
PY 2007
BP 84
EP 120
DI 10.1533/9781845693374.84
PG 37
WC Materials Science, Multidisciplinary
SC Materials Science
GA BSO97
UT WOS:000285182100005
ER

PT J
AU Bernstein, D
AF Bernstein, David
TI Optimal prediction of Burgers's equation
SO MULTISCALE MODELING & SIMULATION
LA English
DT Article
DE optimal prediction; memory; Burgers's equation
ID SPECTRAL METHODS; TURBULENCE
AB We examine an application of the optimal prediction framework to the truncated Fourier-Galerkin approximation of Burgers's equation. Under particular conditions on the density of the modes and the length of the memory kernel, optimal prediction introduces an additional term to the Fourier-Galerkin approximation which represents the influence of an arbitrary number of small wavelength unresolved modes on the long wavelength resolved modes. The modified system, called the t-model by previous authors, takes the form of a time-dependent cubic term added to the original quadratic system. Numerical experiments show that this additional term restores qualitative features of the solution in the case where the number of modes is insufficient to resolve the resulting shocks (i.e., zero or very small viscosity) and for which the original Fourier-Galerkin approximation is very poor. In particular, numerical examples are shown in which the kinetic energy decays in the same manner as in the exact solution, i.e., as t(-2) when t(shock) less than or similar to t less than or similar to Re, even when a very small number of resolved modes is used. Correlation-like quantities related to the memory kernel are then computed, and these exhibit a t(-3) tail for the same time period.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Bernstein, D (reprint author), Silicon Clocks, 39141 Civ Ctr Dr,Suite 450, Fremont, CA 94538 USA.
EM dbernstein@math.lbl.gov
NR 20
TC 14
Z9 14
U1 1
U2 6
PU SIAM PUBLICATIONS
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
SN 1540-3459
J9 MULTISCALE MODEL SIM
JI Multiscale Model. Simul.
PY 2007
VL 6
IS 1
BP 27
EP 52
DI 10.1137/060651720
PG 26
WC Mathematics, Interdisciplinary Applications; Physics, Mathematical
SC Mathematics; Physics
GA 174ED
UT WOS:000246923200002
ER

PT J
AU Lu, ZM
   Zhang, DX
AF Lu, Zhiming
   Zhang, Dongxiao
TI Stochastic simulations for flow in nonstationary randomly heterogeneous
   porous media using a KL-based moment-equation approach
SO MULTISCALE MODELING & SIMULATION
LA English
DT Article
DE Karhunen-Loeve moment equation; Monte Carlo simulations; moment-equation
   methods; Karhunen-Loeve decomposition; nonstationary; heterogeneity;
   variability; porous media
ID UNCERTAINTY; QUANTIFICATION
AB In this study, we extend the Karhunen-Loeve moment equation (KLME) approach, an approach based on KL decomposition, to efficiently and accurately quantify uncertainty for flow in nonstationary heterogeneous porous media that include a number of zones with different statistics of the hydraulic conductivity. We first decompose the log hydraulic conductivity Y=ln K-s for each zone by the KL decomposition, which is related to a set of eigenvalues and their corresponding orthogonal deterministic eigenfunctions. Based on the decomposition for all individual zones, we develop an algorithm to find the eigenvalues and eigenfunctions for the entire domain. Following the methodology proposed by Zhang and Lu [J. Comput. Phys., 194 (2004), pp. 773-794], we solve the head variability up to second order in terms of sigma(2)(Y) and compare the results with those obtained from Monte Carlo (MC) simulations. It is evident that the results from the KLME approach with higher-order corrections are close to those from the MC simulations, but the computational cost for the KLME method is much lower than that for the MC simulations.
C1 Los Alamos Natl Lab, Hydrol & Geochem Grp EES6, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
   Univ Oklahoma, Mewbourne Sch Petr & Geol Engn, Norman, OK 73019 USA.
RP Lu, ZM (reprint author), Los Alamos Natl Lab, Hydrol & Geochem Grp EES6, Div Earth & Environm Sci, MS T003, Los Alamos, NM 87545 USA.
EM zhiming@lanl.gov; donzhang@ou.edu
RI Zhang, Dongxiao/D-5289-2009; 
OI Zhang, Dongxiao/0000-0001-6930-5994; Lu, Zhiming/0000-0001-5800-3368
NR 21
TC 17
Z9 18
U1 0
U2 1
PU SIAM PUBLICATIONS
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
SN 1540-3459
J9 MULTISCALE MODEL SIM
JI Multiscale Model. Simul.
PY 2007
VL 6
IS 1
BP 228
EP 245
DI 10.1137/060665282
PG 18
WC Mathematics, Interdisciplinary Applications; Physics, Mathematical
SC Mathematics; Physics
GA 174ED
UT WOS:000246923200011
ER

PT J
AU Stinis, P
AF Stinis, Panagiotis
TI Higher order Mori-Zwanzig models for the Euler equations
SO MULTISCALE MODELING & SIMULATION
LA English
DT Article
DE dimensional reduction; Euler equations; underresolved computations;
   finite-time blow-up
ID OPTIMAL PREDICTION; ISOTROPIC TURBULENCE; BROWNIAN-MOTION; DECAY
AB In a recent paper [O. H. Hald and P. Stinis, Proc. Natl. Acad. Sci. USA, 104 ( 2007), pp. 6527-6532], an infinitely long memory model ( the t-model) for the Euler equations was presented and analyzed. The model can be derived by keeping the zeroth order term in a Taylor expansion of the memory integrand in the Mori-Zwanzig formalism. We present here a collection of models for the Euler equations which are based also on the Mori-Zwanzig formalism. The models arise from a Taylor expansion of a different operator, the orthogonal dynamics evolution operator, which appears in the memory integrand. The zero, first, and second order models are constructed and simulated numerically. The form of the nonlinearity in the Euler equations, the special properties of the projection operator used, and the general properties of any projection operator can be exploited to facilitate the recursive calculation of even higher order models. We use our models to compute the rate of energy decay for the Taylor-Green vortex problem. The results are in good agreement with the theoretical estimates. The energy decay appears to be organized in "waves" of activity, i.e., alternating periods of fast and slow decay. Our results corroborate the assumption in [O. H. Hald and P. Stinis, Proc. Natl. Acad. Sci. USA, 104 (2007), pp. 6527-6532], that the modeling of the three-dimensional Euler equations by a few low wavenumber modes should include a long memory.
C1 [Stinis, Panagiotis] Univ Calif Berkeley, Dept Math, Berkeley, CA 94720 USA.
RP Stinis, P (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM stinis@math.lbl.gov
NR 32
TC 7
Z9 7
U1 0
U2 3
PU SIAM PUBLICATIONS
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
SN 1540-3459
J9 MULTISCALE MODEL SIM
JI Multiscale Model. Simul.
PY 2007
VL 6
IS 3
BP 741
EP 760
DI 10.1137/06066504X
PG 20
WC Mathematics, Interdisciplinary Applications; Physics, Mathematical
SC Mathematics; Physics
GA 249UG
UT WOS:000252254800002
ER

PT S
AU Masse, WB
   Barber, EW
   Piccardi, L
   Barber, PT
AF Masse, W. Bruce
   Barber, Elizabeth Wayland
   Piccardi, Luigi
   Barber, Paul T.
BE Piccardi, L
   Masse, WB
TI Exploring the nature of myth and its role in science
SO Myth and Geology
SE GEOLOGICAL SOCIETY SPECIAL PUBLICATION
LA English
DT Proceedings Paper
CT Myth and Geology Conference held at 32nd International Geological
   Congress
CY AUG, 2004
CL Florence, ITALY
ID MOUNT MAZAMA; DELPHIC ORACLE; CRATER LAKE; ERUPTION; EARTHQUAKES;
   GREECE; BC
AB The scientific study of myth is dominated by a paradigm that recognizes myth as having been viewed as truthful narrative history by past traditional cultures and yet is considered false or otherwise suspect by the modem scholars who study myth. Although virtually all scholars recognize that myth was of critical importance for traditional cultures, the attempt to elicit scientific reasons for this importance has led to many competing theories, few of which place an emphasis on the validity of myths as representing the product of actual observed historical natural events. This paradox may hinder our understanding of the origins of myth and prevent us from fully appreciating a critical aspect of why myth was so highly valued by past cultures. To set the stage for our examination of the possible natural history core of myth, we discuss briefly the history of the western scientific study of myth, with an emphasis on geological sciences. We then explore the cognitive structure of myth and provide working principles about how the historical information contained in these myths can be transmitted faithfully through successive generations and can be elicited by scientific study. Although recognizing the extreme complexity of myth as a cultural product, our data indicate that a science-based natural history approach can lead to important insights regarding the nature of myth.
C1 Los Alamos Natl Lab, ENV EAQ Ecol& Air Qual Grp, Los Alamos, NM 87545 USA.
RI Piccardi, Luigi/G-9552-2013
OI Piccardi, Luigi/0000-0001-6964-3205
NR 84
TC 9
Z9 9
U1 0
U2 3
PU GEOLOGICAL SOC PUBLISHING HOUSE
PI BATH
PA UNIT 7, BRASSMILL ENTERPRISE CTR, BRASSMILL LANE, BATH BA1 3JN, AVON,
   ENGLAND
SN 0305-8719
BN 978-1-86239-216-8
J9 GEOL SOC SPEC PUBL
PY 2007
VL 273
BP 9
EP 28
DI 10.1144/GSL.SP.2007.273.01.02
PG 20
WC Archaeology; Geology
SC Archaeology; Geology
GA BFX41
UT WOS:000245271600002
ER

PT S
AU Masse, WB
   Masse, MJ
AF Masse, W. Bruce
   Masse, Michael J.
BE Piccardi, L
   Masse, WB
TI Myth and catastrophic reality: using myth to identify cosmic impacts and
   massive Plinian eruptions in Holocene South America
SO MYTH AND GEOLOGY
SE Geological Society Special Publication
LA English
DT Proceedings Paper
CT Myth and Geology Conference held at 32nd International Geological
   Congress
CY AUG, 2004
CL Florence, ITALY
ID CAMPO DEL CIELO; CENTRAL SEMIARID ARGENTINA; EXTRATERRESTRIAL IMPACTS;
   VOLCANIC-ERUPTIONS; RAIN-FOREST; COLOMBIA; WILDFIRES; CRATERS; BRAZIL;
   HUAYNAPUTINA
AB Major natural catastrophes such as floods, fire, darkness, and 'sky falling down' are prominently reflected in traditional South American creation myths, cosmology, religion, and worldview. Cosmogonic myths represent a rich and largely untapped data set concerning the most dramatic natural events and processes experienced by cultural groups during the past several thousand years. Observational details regarding specific catastrophes are encoded in myth storylines, typically cast in terms of supernatural characters and actions. Not only are the myths amenable to scientific analysis, some sets of myths encode multiple catastrophes in meaningful relative chronological order. The present study considers 4259 myths, including 284 'universal' (perceived in the narratives to be worldwide) catastrophe myths, from 20 cultural groups east of the Andes. These myths are examined in light of available geological, palaeoenvironmental, archaeological, and documentary evidence. Our analysis reveals three likely major Plinian volcanic eruptions in Columbia and the Gran Chaco. We also identify a set of traditions that are probably linked to the well-known Campo del Cielo iron meteorite impact in northern Argentina around 4000 years ago, along with a separate set of traditions alluding to a possible airburst in the Brazilian Highlands. These impacts apparantly triggered widespread mass fires. There are hints of cosmic impacts in the mythologies for other locations in South America.
C1 Los Alamos Natl Lab, ENV EAQ Ecol & Air Qual Grp, Los Alamos, NM 87545 USA.
EM wbmasse@lanl.gov; wbmasse@lanl.gov
NR 95
TC 6
Z9 6
U1 0
U2 8
PU GEOLOGICAL SOC PUBLISHING HOUSE
PI BATH
PA UNIT 7, BRASSMILL ENTERPRISE CTR, BRASSMILL LANE, BATH BA1 3JN, AVON,
   ENGLAND
SN 0305-8719
BN 978-1-86239-216-8
J9 GEOL SOC SPEC PUBL
JI Geol. Soc. Spec. Publ.
PY 2007
VL 273
BP 177
EP 202
DI 10.1144/GSL.SP.2007.273.01.15
PG 26
WC Archaeology; Geology
SC Archaeology; Geology
GA BFX41
UT WOS:000245271600015
ER

PT J
AU Zhao, JD
   Wolk, CP
AF Zhao, Jindong
   Wolk, C. Peter
BE Whitworth, DE
TI Developmental Biology of Heterocysts, 2006
SO MYXOBACTERIA: MULTICELLULARITY AND DIFFERENTIATION
LA English
DT Article; Book Chapter
ID SP STRAIN PCC-7120; ANABAENA-SP PCC-7120; BLUE-GREEN-ALGA;
   GLUTAMINE-SYNTHETASE ACTIVITY; CALCIUM-MEDIATED REGULATION; GLOBAL
   NITROGEN REGULATOR; NTCA TRANSCRIPTION FACTOR; P-II PROTEIN;
   CYANOBACTERIUM-ANABAENA; PCC 7120
C1 [Zhao, Jindong] Peking Univ, Coll Life Sci, State Key Lab Prot & Plant Genet Engn, Beijing 100871, Peoples R China.
   [Wolk, C. Peter] Michigan State Univ, MSU DOE Plant Res Lab, E Lansing, MI 48824 USA.
   [Wolk, C. Peter] Michigan State Univ, Dept Plant Biol, E Lansing, MI 48824 USA.
RP Zhao, JD (reprint author), Peking Univ, Coll Life Sci, State Key Lab Prot & Plant Genet Engn, Beijing 100871, Peoples R China.
NR 178
TC 1
Z9 1
U1 0
U2 0
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N STREET NW, WASHINGTON, DC 20036-2904 USA
BN 978-1-55581-420-5
PY 2007
BP 397
EP +
PG 23
WC Cell Biology; Microbiology
SC Cell Biology; Microbiology
GA BOY04
UT WOS:000277999600024
ER

PT J
AU Allen, PB
AF Allen, Philip B.
TI Nanocrystalline nanowires: I. Structure
SO NANO LETTERS
LA English
DT Article
ID NANOSTRUCTURES; NANOTUBES; MICROSCOPY; CHEMISTRY; TITANATE; NANORODS;
   PHYSICS
AB Geometric constructions of possible atomic arrangements are suggested for inorganic nanowires. These are fragments of bulk crystals, and can be called "nanocrystalline" nanowires (NCNW). To minimize surface polarity, nearly one-dimensional formula units, oriented along the growth axis, generate NCNWs by translation and rotation.
C1 SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
   Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
RP Allen, PB (reprint author), SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
EM philip.allen@stonybrook.edu
NR 33
TC 15
Z9 15
U1 0
U2 5
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD JAN
PY 2007
VL 7
IS 1
BP 6
EP 10
DI 10.1021/nl062139z
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 124PK
UT WOS:000243381300002
PM 17212431
ER

PT J
AU Allen, PB
AF Allen, Philip B.
TI Nanocrystalline nanowires: 2. Phonons
SO NANO LETTERS
LA English
DT Article
ID WALL CARBON NANOTUBES; SYMMETRY; TUBULES
AB Nanocrystalline nanowires (NCNW) are fragments of bulk crystals that are infinite in only one direction. A construction is given for calculating eigenstates belonging to the symmetry labels (k,m) (wavevector and rotational quantum number). Vibrational harmonic eigenstates are worked out explicitly for a simple model, illustrating the general results: the LA mode has m = 0, while with sufficient rotational symmetry, the TA branch is doubly degenerate, has m = +/- 1, and has quadratic dispersion with k for k less than the reciprocal diameter of the NCNW. The twiston branch (a fourth Goldstone boson) is an acoustic m = 0 branch, additional to the LA and two TA branches.
C1 SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
   Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
RP Allen, PB (reprint author), SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
EM philip.allen@stonybrook.edu
NR 15
TC 5
Z9 5
U1 2
U2 7
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD JAN
PY 2007
VL 7
IS 1
BP 11
EP 14
DI 10.1021/nl062140y
PG 4
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
   Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
   Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
   Physics
GA 124PK
UT WOS:000243381300003
PM 17212432
ER

PT J
AU Zhu, K
   Neale, NR
   Miedaner, A
   Frank, AJ
AF Zhu, Kai
   Neale, Nathan R.
   Miedaner, Alexander
   Frank, Arthur J.
TI Enhanced charge-collection efficiencies and light scattering in
   dye-sensitized solar cells using oriented TiO2 nanotubes arrays
SO NANO LETTERS
LA English
DT Article
ID TITANIUM-OXIDE NANOTUBE; BAND-EDGE MOVEMENT; ELECTRON-TRANSPORT;
   ANODIC-OXIDATION; RECOMBINATION; PHOTOCURRENT; FABRICATION; FILMS;
   SPECTROSCOPY; STABILITY
AB We report on the microstructure and dynamics of electron transport and recombination in dye-sensitized solar cells (DSSCs) incorporating oriented TiO2 nanotube (NT) arrays. The morphology of the NT arrays, which were prepared from electrochemically anodized Ti foils, were characterized by scanning and transmission electron microscopies. The arrays were found to consist of closely packed NTs, several micrometers in length, with typical wall thicknesses and intertube spacings of 8-10 nm and pore diameters of about 30 nm. The calcined material was fully crystalline with individual NTs consisting of about 30 nm sized crystallites. The transport and recombination properties of the NT and nanoparticle (NP) films used in DSSCs were studied by frequency-resolved modulated photocurrent/photovoltage spectroscopies. While both morphologies display comparable transport times, recombination was much slower in the NT films, indicating that the NT-based DSSCs have significantly higher charge-collection efficiencies than their NP-based counterparts. Dye molecules were shown to cover both the interior and exterior walls of the NTs. Analysis of photocurrent measurements indicates that the light-harvesting efficiencies of NT-based DSSCs were higher than those found for DSSCs incorporating NPs owing to stronger internal light-scattering effects.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Frank, AJ (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM afrank@nrel.gov
NR 37
TC 1515
Z9 1547
U1 71
U2 691
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD JAN
PY 2007
VL 7
IS 1
BP 69
EP 74
DI 10.1021/nl062000o
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
   Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
   Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
   Physics
GA 124PK
UT WOS:000243381300013
PM 17212442
ER

PT J
AU Tretiak, S
   Kilina, S
   Piryatinski, A
   Saxena, A
   Martin, RL
   Bishop, AR
AF Tretiak, Sergei
   Kilina, Svetlana
   Piryatinski, Andrei
   Saxena, Avadh
   Martin, Richard L.
   Bishop, Alan R.
TI Excitons and peierls distortion in conjugated carbon nanotubes
SO NANO LETTERS
LA English
DT Article
ID MOLECULES; DYNAMICS; PHONONS; SPECTRA
AB We investigate coupled excitonic and vibrational effects in carbon nanotubes using a time-dependent Hartree-Fock approach. The results reveal intricate details of excited-state dynamics. In the ground state, spontaneous uneven distribution of the pi electrons over the bonds (i.e., Peierls dimerization) is observed throughout the entire nanotube, particularly in large-radius CNTs. However, we demonstrate that vibrational relaxation following photoexcitations leads to substantial local distortion of the tube surface, overriding the Peierls dimerization. This mutually affects the electronic system, resulting in localized states (self-trapped excitons). These phenomena critically control photoinduced dynamics and charge transport in nanotube materials.
C1 Los Alamos Natl Lab, CNLS, Theoret Div, Los Alamos, NM 87545 USA.
   Los Alamos Natl Lab, CINT, Los Alamos, NM 87545 USA.
   Univ Washington, Dept Chem, Seattle, WA 98195 USA.
RP Tretiak, S (reprint author), Los Alamos Natl Lab, CNLS, Theoret Div, POB 1663, Los Alamos, NM 87545 USA.
EM serg@lanl.gov
RI Piryatinski, Andrei/B-5543-2009; Tretiak, Sergei/B-5556-2009
OI Tretiak, Sergei/0000-0001-5547-3647
NR 40
TC 39
Z9 39
U1 1
U2 10
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
EI 1530-6992
J9 NANO LETT
JI Nano Lett.
PD JAN
PY 2007
VL 7
IS 1
BP 86
EP 92
DI 10.1021/nl0622000
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 124PK
UT WOS:000243381300016
PM 17212445
ER

PT J
AU Piryatinski, A
   Ivanov, SA
   Tretiak, S
   Klimov, VI
AF Piryatinski, Andrei
   Ivanov, Sergei A.
   Tretiak, Sergei
   Klimov, Victor I.
TI Effect of quantum and dielectric confinement on the exciton-exciton
   interaction energy in type II core/shell semiconductor nanocrystals
SO NANO LETTERS
LA English
DT Article
ID SHELL NANOCRYSTALS; OPTICAL GAIN; DOTS; STATES
AB We study theoretically two electron-hole pair states (biexcitons) in core/shell hetero-nanocrystals with type II alignment of energy states, which promotes spatial separation of electrons and holes. To describe Coulomb interactions in these structures, we apply first-order perturbation theory, in which we use an explicit form of the Coulomb-coupling operator that takes into account interface-polarization effects. This formalism is used to analyze the exciton-exciton interaction energy as a function of the core and shell sizes and their dielectric properties. Our analysis shows that the combined contributions from quantum and dielectric confinement can result in strong exciton-exciton repulsion with giant interaction energies on the order of 100 meV. Potential applications of strongly interacting biexciton states include such areas as lasing, nonlinear optics, and quantum information.
C1 Los Alamos Natl Lab, CNLS, Theoret Div, Chem Div, Los Alamos, NM 87545 USA.
   Los Alamos Natl Lab, CINT, Los Alamos, NM 87545 USA.
RP Piryatinski, A (reprint author), Los Alamos Natl Lab, CNLS, Theoret Div, Chem Div, POB 1663, Los Alamos, NM 87545 USA.
EM apiryat@lanl.gov; klimov@lanl.gov
RI Piryatinski, Andrei/B-5543-2009; Ivanov, Sergei/B-5505-2011; Tretiak,
   Sergei/B-5556-2009; 
OI Tretiak, Sergei/0000-0001-5547-3647; Klimov, Victor/0000-0003-1158-3179
NR 30
TC 121
Z9 123
U1 1
U2 41
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD JAN
PY 2007
VL 7
IS 1
BP 108
EP 115
DI 10.1021/nl0622404
PG 8
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
   Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
   Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
   Physics
GA 124PK
UT WOS:000243381300019
PM 17212448
ER

PT J
AU Fu, AH
   Gu, WW
   Boussert, B
   Koski, K
   Gerion, D
   Manna, L
   Le Gros, M
   Larabell, CA
   Alivisatos, AP
AF Fu, Aihua
   Gu, Weiwei
   Boussert, Benjamin
   Koski, Kristie
   Gerion, Daniele
   Manna, Liberato
   Le Gros, Mark
   Larabell, Carolyn A.
   Alivisatos, A. Paul
TI Semiconductor quantum rods as single molecule fluorescent biological
   labels
SO NANO LETTERS
LA English
DT Article
ID IN-VIVO; CELL MOTILITY; DOTS; NANOCRYSTALS; NANOPARTICLES; PROTEINS;
   NANORODS; DELIVERY
AB In this paper, we report the development of rod-shaped semiconductor nanocrystals (quantum rods) as fluorescent biological labels. Water-soluble biocompatible quantum rods have been prepared by surface silanization and applied for nonspecific cell tracking as well as specific cellular targeting. Quantum rods are brighter single molecule probes as compared to quantum dots. They have many potential applications as biological labels in situations where their properties offer advantages over quantum dots.
C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   Univ Calif San Francisco, Dept Anat, San Francisco, CA 94143 USA.
   Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
   Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA.
RP Alivisatos, AP (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM alivis@berkeley.edu
RI Koski, Kristie/A-6740-2009; Manna, Liberato/G-2339-2010; Alivisatos ,
   Paul /N-8863-2015
OI Manna, Liberato/0000-0003-4386-7985; Alivisatos , Paul
   /0000-0001-6895-9048
FU NCRR NIH HHS [P41 RR019664]; NIGMS NIH HHS [GM070445, R01 GM070445]; PHS
   HHS [0980GFD623]
NR 29
TC 128
Z9 134
U1 5
U2 47
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD JAN
PY 2007
VL 7
IS 1
BP 179
EP 182
DI 10.1021/nl0626434
PG 4
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
   Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
   Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
   Physics
GA 124PK
UT WOS:000243381300031
PM 17212460
ER

PT S
AU Lupini, AR
   Rashkeev, SN
   Varela, M
   Borisevich, AY
   Oxley, MP
   van Benthem, K
   Peng, Y
   de Jonge, N
   Veith, GM
   Pantelides, ST
   Chisholm, MF
   Pennycook, SJ
AF Lupini, A. R.
   Rashkeev, S. N.
   Varela, M.
   Borisevich, A. Y.
   Oxley, M. P.
   van Benthem, K.
   Peng, Y.
   de Jonge, N.
   Veith, G. M.
   Pantelides, S. T.
   Chisholm, M. F.
   Pennycook, S. J.
BE Hutchison, J
   Kirkland, A
TI Scanning Transmission Electron Microscopy
SO NANOCHARACTERISATION
SE RSC Nanoscience and Nanotechnology
LA English
DT Article; Book Chapter
ID INELASTICALLY SCATTERED ELECTRONS; TEMPERATURE CO OXIDATION;
   SPHERICAL-ABERRATION; CATALYTIC-ACTIVITY; IMAGE-FORMATION; SUPPORTED
   GOLD; EDGE STRUCTURE; RESOLUTION; CRYSTALS; DIFFRACTION
C1 [Lupini, A. R.; Rashkeev, S. N.; Varela, M.; Borisevich, A. Y.; Oxley, M. P.; van Benthem, K.; Peng, Y.; de Jonge, N.; Veith, G. M.; Pantelides, S. T.; Chisholm, M. F.; Pennycook, S. J.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Lupini, AR (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
NR 82
TC 6
Z9 6
U1 1
U2 2
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, CAMBRIDGE CB4 4WF, CAMBS, ENGLAND
SN 1757-7136
BN 978-1-84755-792-6; 978-0-85404-241-8
J9 RSC NANOSCI NANOTECH
PY 2007
IS 3
BP 28
EP 65
D2 10.1039/9781847557926
PG 38
WC Nanoscience & Nanotechnology; Microscopy
SC Science & Technology - Other Topics; Microscopy
GA BKV97
UT WOS:000269444000002
ER

PT J
AU Trebotich, D
   Miller, GH
   Bybee, MD
AF Trebotich, D.
   Miller, G. H.
   Bybee, M. D.
TI A hard constraint algorithm to model particle interactions in DNA-LADEN
   flows
SO NANOSCALE AND MICROSCALE THERMOPHYSICAL ENGINEERING
LA English
DT Article
DE microfluidics; fluid-polymer coupling; viscoelasticity; Navier-Stokes;
   multiscale computational modeling
ID BROWNIAN DYNAMICS SIMULATIONS; CHAINS
AB We present a new numerical method for particle interactions in polymer-fluid models of DNA-laden flows. The DNA is represented by a bead-rod polymer model and is fully-coupled to the fluid. The main objective in this work is to properly model polymer-polymer and polymersurface interactions by enforcing the physical rod-rod and rod-surface non-crossing constraints. Our new method is based on a rigid constraint algorithm whereby rods elastically bounce off one another to prevent crossing, similar to our previous algorithm used to model polymer-surface interactions.
C1 Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94551 USA.
   Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA.
   Univ Illinois, Dept Chem & Biomol Engn, Urbana, IL 61801 USA.
RP Trebotich, D (reprint author), Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, POB 808,L-560, Livermore, CA 94551 USA.
EM trebotich1@llnl.gov
NR 9
TC 3
Z9 3
U1 1
U2 2
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 1556-7265
J9 NANOSC MICROSC THERM
JI Nanoscale Microscale Thermophys. Eng.
PY 2007
VL 11
IS 1-2
BP 121
EP 128
DI 10.1080/15567260701337423
PG 8
WC Thermodynamics; Engineering, Mechanical; Nanoscience & Nanotechnology;
   Materials Science, Characterization & Testing; Physics, Applied
SC Thermodynamics; Engineering; Science & Technology - Other Topics;
   Materials Science; Physics
GA 180OE
UT WOS:000247374100010
ER

PT S
AU Lu, YL
   Dajani, IA
   Mandeville, WJ
   Knize, RJ
   Mao, SS
AF Lu, Yalin
   Dajani, Iyad A.
   Mandeville, W. J.
   Knize, R. J.
   Mao, S. S.
BE Bai, C
   Xie, S
   Zhu, X
TI New p-n junction photodetector using optimized ZnO nanorod array
SO NANOSCIENCE AND TECHNOLOGY, PTS 1 AND 2
SE Solid State Phenomena
LA English
DT Proceedings Paper
CT China International Conference on Nanoscience and Technology (ChinaNANO
   2005)
CY JUN 09-11, 2005
CL Beijing, PEOPLES R CHINA
SP Natl Ctr Nanosci & Technol, Natl Steering Comm Nanotechnol
DE photodetector; nanorod array; combinatorial spreadsheet; ZnO
AB In this research, nanoscale spatial resolution p-n junction photodetector arrays were developed using ZnO nanorod arrays grown on p-type silicon substrates. In order to optimize the nanorod array quality, an advanced combinatorial spreadsheet approach was used to optimize the Au catalyst thickness. The crystallinity of these as-grown ZnO nanorods' was compared to that of bulk and thin film ZnO materials.
C1 [Lu, Yalin; Dajani, Iyad A.; Mandeville, W. J.; Knize, R. J.] USAF Acad, Dept Phys, LORC, 2354 Fairchild Dr 2A31, Colorado Springs, CO 80840 USA.
   [Mao, S. S.] LBNL, Berkeley, CA 94720 USA.
RP Lu, YL (reprint author), USAF Acad, Dept Phys, LORC, 2354 Fairchild Dr 2A31, Colorado Springs, CO 80840 USA.
EM yalin.lu@usafa.af.mil
NR 5
TC 0
Z9 0
U1 0
U2 1
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 1012-0394
BN 978-3-908451-30-3
J9 SOLID STATE PHENOMEN
PY 2007
VL 121-123
BP 809
EP 812
PN 1-2
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
   Physics, Applied; Physics, Condensed Matter
SC Science & Technology - Other Topics; Materials Science; Physics
GA BFV01
UT WOS:000244739900192
ER

PT S
AU Lee, JW
AF Lee, James Weifu
BE Bai, C
   Xie, S
   Zhu, X
TI Nanoelectrode-gated detection of individual molecules with potential for
   rapid DNA sequencing
SO Nanoscience and Technology, Pts 1 and 2
SE SOLID STATE PHENOMENA
LA English
DT Proceedings Paper
CT China International Conference on Nanoscience and Technology (ChinaNANO
   2005)
CY JUN 09-11, 2005
CL Beijing, PEOPLES R CHINA
SP Natl Ctr Nanosci & Technol, Natl Steering Comm Nanotechnol
DE detection of single molecules; DNA sequencing; nanoelectrode-gated
   molecular detection; electron-tunneling spectroscopy; precision
   electrolytic nanofabrication
ID DISCRIMINATION; HYDROGEN; CHANNEL
AB A systematic nanoelectrode-gated electron-tunneling molecular-detection concept with potential for rapid DNA sequencing has recently been invented at Oak Ridge National Laboratory (ORNL). A DNA molecule is a polymer that typically contains four different types of nucleotide bases: adenine (A), thymine (T), guanine (G), and cytosine (C) on its phosphate-deoxyribose chain. According to the nanoelectrode-gated molecular-detection concept, it should be possible to obtain genetic sequence information by probing through a DNA molecule base by base at a nanometer scale, as if looking at a strip of movie film. The nanoscale reading of DNA sequences is envisioned to take place at a nanogap (gate) defined by a pair of nanoelectrode tips as a DNA molecule moves through the gate base by base. The rationale is that sample molecules, such as the four different nucleotide bases, each with a distinct chemical composition and structure, should produce a specific perturbation effect on the tunneling electron beam across the two nanoelectrode tips. A sample molecule could thus be detected when it enters the gate. This nanoscience-based approach could lead to a new DNA sequencing technology that could be thousands of times faster than the current technology (Sanger's "dideoxy" protocol-based capillary electrophoresis systems). Both computational and experimental studies are underway at ORNL towards demonstrating this nanotechnology concept.
C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Lee, JW (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
NR 19
TC 3
Z9 3
U1 0
U2 1
PU TRANS TECH PUBLICATIONS LTD
PI STAFA-ZURICH
PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
SN 1012-0394
BN 978-3-908451-30-3
J9 SOL ST PHEN
PY 2007
VL 121-123
BP 1379
EP 1386
PN 1-2
PG 8
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
   Physics, Applied; Physics, Condensed Matter
SC Science & Technology - Other Topics; Materials Science; Physics
GA BFV01
UT WOS:000244739900322
ER

PT S
AU Krstic, PS
   Wells, JC
   Fuentes-Cabrera, M
   Xu, D
   Lee, JW
AF Krstic, Predrag S.
   Wells, Jack C.
   Fuentes-Cabrera, Miguel
   Xu, Dong
   Lee, James W.
BE Bai, C
   Xie, S
   Zhu, X
TI Toward electronic conductance characterization of DNA nucleotide bases
SO NANOSCIENCE AND TECHNOLOGY, PTS 1 AND 2
SE Solid State Phenomena
LA English
DT Proceedings Paper
CT China International Conference on Nanoscience and Technology (ChinaNANO
   2005)
CY JUN 09-11, 2005
CL Beijing, PEOPLES R CHINA
SP Natl Ctr Nanosci & Technol, Natl Steering Comm Nanotechnol
DE DNA; sequencing; conductance; electron transport; nucleotides;
   nanoelectrodes
ID SEQUENCE
AB We calculate electron-transport properties within equilibrium, linear transport theory through the DNA nucleotide bases spanning two gold nanowires. Our quantum mechanical calculations show that single configurations of DNA bases A, C, T, and G have significantly different charge conductance characteristics. This result is consistent with the notion that it is possible to read the nucleotide base sequence on an individual DNA heteropolymer which is moving through a gap between electrically biased nanoelectrodes by measuring the changes in the electron-transport conductance.
C1 [Lee, James W.] Oak Ridge Natl Lab, Div Chem Sci, POB 2008, Oak Ridge, TN 37831 USA.
   [Krstic, Predrag S.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
   [Wells, Jack C.; Fuentes-Cabrera, Miguel] Oak Ridge Natl Lab, Comp Sci & Math, Oak Ridge, TN 37831 USA.
   [Xu, Dong] Univ Missouri, Dept Comp Sci, Columbia, MO 65211 USA.
RP Lee, JW (reprint author), Oak Ridge Natl Lab, Div Chem Sci, POB 2008, Oak Ridge, TN 37831 USA.
EM Leejw@ornl.gov
RI Fuentes-Cabrera, Miguel/Q-2437-2015; Wells, Jack/D-3675-2016
OI Fuentes-Cabrera, Miguel/0000-0001-7912-7079; Wells,
   Jack/0000-0002-5083-3030
FU U.S. National Human Genome Research Institute of the National Institutes
   of Health [1 R21 HG003578-01]; U.S. Department of Energy (DOE) Office of
   Fusion Energy Sciences (PK); Division of Materials Sciences and
   Engineering (JCW) at ORNL; UT-Battelle for the U.S. DOE [DEAC05-
   00OR22725]; U.S. DOE Office of Science Young Scientist Award; U.S.
   Presidential Early Career Award for Scientists and Engineers (to JWL);
   ORNL Center for Computational Sciences.
FX This research was supported by the U.S. National Human Genome Research
   Institute of the National Institutes of Health under grant No. 1 R21
   HG003578-01, by U.S. Department of Energy (DOE) Office of Fusion Energy
   Sciences (PK) and by Division of Materials Sciences and Engineering
   (JCW) at ORNL managed by a UT-Battelle for the U.S. DOE under contract
   No. DEAC05- 00OR22725, by the U.S. DOE Office of Science Young Scientist
   Award and the U.S. Presidential Early Career Award for Scientists and
   Engineers (to JWL), and by the ORNL Center for Computational Sciences.
NR 11
TC 2
Z9 2
U1 1
U2 2
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 1012-0394
BN 978-3-908451-30-3
J9 SOLID STATE PHENOMEN
PY 2007
VL 121-123
BP 1387
EP 1390
PN 1-2
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
   Physics, Applied; Physics, Condensed Matter
SC Science & Technology - Other Topics; Materials Science; Physics
GA BFV01
UT WOS:000244739900323
ER

PT B
AU Mao, SS
AF Mao, Samuel S.
BE Korkin, A
   Evgeni, G
   Labanowski, J
   Luryi, S
TI Strategies of nanoscale semiconductor lasers
SO Nanotechnology for Electronic Materials and Devices
SE NANOSTRUCTURE SCIENCE AND TECHNOLOGY
LA English
DT Proceedings Paper
CT 2nd Meeting on Nano and Giga Challenges in Microelectronics
CY 2004
CL POLAND
ID QUANTUM-WIRE LASERS; MOLECULAR-BEAM EPITAXY; SURFACE-EMITTING LASER;
   CHEMICAL-VAPOR-DEPOSITION; THRESHOLD CURRENT-DENSITY; ROOM-TEMPERATURE
   OPERATION; CLEAVED EDGE OVERGROWTH; DISTRIBUTED-FEEDBACK LASERS;
   SHORT-PERIOD SUPERLATTICES; CURRENT-BLOCKING LAYERS
C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA.
RP Mao, SS (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
NR 272
TC 0
Z9 0
U1 1
U2 3
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-0-387-23349-9
J9 NAN SCI TEC
PY 2007
BP 105
EP 169
DI 10.1007/978-0-387-49965-9_3
PG 65
WC Nanoscience & Nanotechnology; Physics, Condensed Matter
SC Science & Technology - Other Topics; Physics
GA BFQ22
UT WOS:000243744800003
ER

PT B
AU Chen, K
   Vo-Dinh, T
AF Chen, Kui
   Vo-Dinh, Tuan
BE VoDinh, T
TI Single-Molecule Detection Techniques for Monitoring Cellular Activity at
   the Nanoscale Level
SO NANOTECHNOLOGY IN BIOLOGY AND MEDICINE: METHODS, DEVICES, AND
   APPLICATIONS
LA English
DT Article; Book Chapter
ID SURFACE-ENHANCED RAMAN; FLUORESCENCE CORRELATION SPECTROSCOPY; RESONANCE
   ENERGY-TRANSFER; PROTEIN CONFORMATIONAL-CHANGES; CROSS-CORRELATION
   SPECTROSCOPY; FIELD OPTICAL MICROSCOPY; LIVING CELLS; 2-PHOTON
   EXCITATION; KINESIN MOLECULES; LIVE CELLS
C1 [Chen, Kui] Oak Ridge Natl Lab, Oak Ridge, TN USA.
   [Vo-Dinh, Tuan] Duke Univ, Div Life Sci, Durham, NC USA.
   [Vo-Dinh, Tuan] Duke Univ, Fitzpatrick Inst Photon, Durham, NC USA.
RP Chen, K (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN USA.
NR 166
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-0-8493-2949-4
PY 2007
D2 10.1201/9781420004441
PG 24
WC Engineering, Biomedical; Engineering, Electrical & Electronic;
   Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BKN95
UT WOS:000268735400016
ER

PT B
AU de Jonge, N
   Sougrat, R
   Peckys, DB
   Lupini, AR
   Pennycook, SJ
AF de Jonge, Niels
   Sougrat, Rachid
   Peckys, Diana B.
   Lupini, Andrew R.
   Pennycook, Stephen J.
BE VoDinh, T
TI Three-Dimensional Aberration-Corrected Scanning Transmission Electron
   Microscopy for Biology
SO NANOTECHNOLOGY IN BIOLOGY AND MEDICINE: METHODS, DEVICES, AND
   APPLICATIONS
LA English
DT Article; Book Chapter
ID HIGH-RESOLUTION; DARK-FIELD; CRYOELECTRON TOMOGRAPHY;
   SPHERICAL-ABERRATION; SCATTERED ELECTRONS; HUMAN GENOME; Z-CONTRAST;
   IMAGE-RECONSTRUCTION; ANGSTROM RESOLUTION; ATOMIC-RESOLUTION
AB Recent instrumental developments have enabled greatly improved resolution of scanning transmission electron microscopes (STEM) through aberration correction. An additional and previously unanticipated advantage of aberration correction is the largely improved depth sensitivity that has led to the reconstruction of a three-dimensional (3D) image from a focal series.
   In this chapter the potential of aberration-corrected 3D STEM to provide major improvements in the imaging capabilities for biological samples will be discussed. This chapter contains a brief overview of the various high-resolution 3D imaging techniques, a historical perspective of the development of STEM, first estimates of the dose-limited axial and lateral resolution oil biological samples and initial experiments on stained thin sections.
C1 [de Jonge, Niels; Peckys, Diana B.; Lupini, Andrew R.; Pennycook, Stephen J.] Oak Ridge Natl Lab, Div Mat Sci & Engn, Oak Ridge, TN USA.
   [Sougrat, Rachid] Natl Inst Hlth & Human Dev, Cell Biol & Metab Branch, NIH, Bethesda, MD USA.
RP de Jonge, N (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Engn, Oak Ridge, TN USA.
NR 127
TC 2
Z9 2
U1 0
U2 1
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-0-8493-2949-4
PY 2007
D2 10.1201/9781420004441
PG 28
WC Engineering, Biomedical; Engineering, Electrical & Electronic;
   Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BKN95
UT WOS:000268735400013
ER

PT B
AU Kasili, PM
   Vo-Dinh, T
AF Kasili, Paul M.
   Vo-Dinh, Tuan
BE VoDinh, T
TI Monitoring Apoptosis and Anticancer Drug Activity in Single Cells Using
   Nanosensors
SO NANOTECHNOLOGY IN BIOLOGY AND MEDICINE: METHODS, DEVICES, AND
   APPLICATIONS
LA English
DT Article; Book Chapter
ID CYTOCHROME-C; CAPILLARY-ELECTROPHORESIS; OPTICAL NANOSENSORS;
   INHIBITION; INDUCTION; BIOSENSOR; CASPASES; PATHWAYS; DYNAMICS; PROTEASE
C1 [Kasili, Paul M.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
   [Vo-Dinh, Tuan] Duke Univ, Fitzpatrick Inst Photon, Durham, NC USA.
   [Vo-Dinh, Tuan] Duke Univ, Div Life Sci, Durham, NC USA.
RP Kasili, PM (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN USA.
NR 35
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-0-8493-2949-4
PY 2007
D2 10.1201/9781420004441
PG 13
WC Engineering, Biomedical; Engineering, Electrical & Electronic;
   Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BKN95
UT WOS:000268735400033
ER

PT B
AU McKnight, TE
   Melechko, AV
   Griffin, GD
   Guillorn, MA
   Merkulov, VI
   Doktycz, MJ
   Ericson, MN
   Simpson, ML
AF McKnight, Timothy E.
   Melechko, Anatoli V.
   Griffin, Guy D.
   Guillorn, Michael A.
   Merkulov, Vladimir I.
   Doktycz, Mitchel J.
   Ericson, M. Nance
   Simpson, Michael L.
BE VoDinh, T
TI Cellular Interfacing with Arrays of Vertically Aligned Carbon Nanofibers
   and Nanofiber-Templated Materials
SO NANOTECHNOLOGY IN BIOLOGY AND MEDICINE: METHODS, DEVICES, AND
   APPLICATIONS
LA English
DT Article; Book Chapter
ID CHEMICAL-VAPOR-DEPOSITION; LARGE-SCALE SYNTHESIS; GROWTH; NANOTUBE; DNA;
   CELLS; ELECTRODES; FUNCTIONALIZATION; NANOSTRUCTURES; FABRICATION
C1 [McKnight, Timothy E.; Melechko, Anatoli V.; Griffin, Guy D.; Merkulov, Vladimir I.; Doktycz, Mitchel J.; Ericson, M. Nance; Simpson, Michael L.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
   [Simpson, Michael L.] Univ Tennessee, Knoxville, TN USA.
   [Guillorn, Michael A.] Cornell Univ, Cornell NanoScale Facil, Ithaca, NY USA.
RP McKnight, TE (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN USA.
RI Ericson, Milton/H-9880-2016
OI Ericson, Milton/0000-0002-6628-4865
NR 49
TC 0
Z9 0
U1 0
U2 2
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-0-8493-2949-4
PY 2007
D2 10.1201/9781420004441
PG 22
WC Engineering, Biomedical; Engineering, Electrical & Electronic;
   Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BKN95
UT WOS:000268735400022
ER

PT B
AU Sumpter, BG
   Barnes, MD
   Shelton, WA
   Harrison, RJ
   Noid, DW
AF Sumpter, B. G.
   Barnes, M. D.
   Shelton, W. A.
   Harrison, R. J.
   Noid, D. W.
BE VoDinh, T
TI Development and Modeling of a Novel Self-Assembly Process for Polymer
   and Polymeric Composite Nanoparticles
SO NANOTECHNOLOGY IN BIOLOGY AND MEDICINE: METHODS, DEVICES, AND
   APPLICATIONS
LA English
DT Article; Book Chapter
ID DENSITY-FUNCTIONAL THEORY; POLY(PHENYLENE VINYLENE) DERIVATIVES;
   ELECTRONIC-ENERGY TRANSFER; PI-CONJUGATED OLIGOMERS;
   MONTE-CARLO-SIMULATION; MM3 FORCE-FIELD; MOLECULAR-MECHANICS; CARBON
   NANOTUBES; SEMICONDUCTING POLYMER; CHARGE-TRANSFER
C1 [Sumpter, B. G.; Shelton, W. A.; Harrison, R. J.; Noid, D. W.] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN USA.
   [Barnes, M. D.] Univ Massachusetts, Dept Chem, Amherst, MA 01003 USA.
RP Sumpter, BG (reprint author), Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN USA.
NR 107
TC 0
Z9 0
U1 0
U2 3
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-0-8493-2949-4
PY 2007
D2 10.1201/9781420004441
PG 27
WC Engineering, Biomedical; Engineering, Electrical & Electronic;
   Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BKN95
UT WOS:000268735400014
ER

PT B
AU Wabuyele, MB
   Yan, F
   Vo-Dinh, T
AF Wabuyele, Musundi B.
   Yan, Fei
   Vo-Dinh, Tuan
BE VoDinh, T
TI Cellular Imaging and Analysis Using SERS-Active Nanoparticles
SO NANOTECHNOLOGY IN BIOLOGY AND MEDICINE: METHODS, DEVICES, AND
   APPLICATIONS
LA English
DT Article; Book Chapter
ID SURFACE-ENHANCED RAMAN; ACOUSTOOPTIC TUNABLE FILTER; SINGLE-MOLECULE
   DETECTION; SCATTERING SERS; COLLOIDAL SILVER; ELECTROMAGNETIC THEORY;
   GOLD NANOSHELLS; SPECTROSCOPY; DNA; SPECTROMETRY
C1 [Wabuyele, Musundi B.] Oak Ridge Natl Lab, Adv Biomed Sci & Technol Grp, Oak Ridge, TN USA.
   [Yan, Fei; Vo-Dinh, Tuan] Duke Univ, Fitzpatrick Inst Photon, Durham, NC USA.
   [Vo-Dinh, Tuan] Duke Univ, Div Life Sci, Durham, NC USA.
RP Wabuyele, MB (reprint author), Oak Ridge Natl Lab, Adv Biomed Sci & Technol Grp, Oak Ridge, TN USA.
RI Yan, Fei/P-1330-2014
OI Yan, Fei/0000-0001-5983-143X
NR 68
TC 0
Z9 0
U1 0
U2 3
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-0-8493-2949-4
PY 2007
D2 10.1201/9781420004441
PG 15
WC Engineering, Biomedical; Engineering, Electrical & Electronic;
   Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BKN95
UT WOS:000268735400028
ER

PT B
AU Wabuyele, MB
   Vo-Dinh, T
AF Wabuyele, Musundi B.
   Vo-Dinh, Tuan
BE VoDinh, T
TI Nanoimaging of Biomolecules Using Near-Field Scanning Optical Microscopy
SO NANOTECHNOLOGY IN BIOLOGY AND MEDICINE: METHODS, DEVICES, AND
   APPLICATIONS
LA English
DT Article; Book Chapter
ID ATOMIC-FORCE MICROSCOPY; MULTIDRUG-RESISTANCE; CELL BIOLOGY;
   P-GLYCOPROTEIN; PROTEINS; DNA; TRANSPORTERS; CANCER; LINES
C1 [Wabuyele, Musundi B.] Oak Ridge Natl Lab, Adv Biomed Sci & Technol Grp, Oak Ridge, TN USA.
   [Vo-Dinh, Tuan] Duke Univ, Fitzpatrick Inst Photon, Durham, NC USA.
   [Vo-Dinh, Tuan] Duke Univ, Div Life Sci, Durham, NC USA.
RP Wabuyele, MB (reprint author), Oak Ridge Natl Lab, Adv Biomed Sci & Technol Grp, Oak Ridge, TN USA.
NR 36
TC 0
Z9 0
U1 0
U2 1
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-0-8493-2949-4
PY 2007
D2 10.1201/9781420004441
PG 13
WC Engineering, Biomedical; Engineering, Electrical & Electronic;
   Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BKN95
UT WOS:000268735400012
ER

PT J
AU Yan, WF
   Overbury, SH
   Dai, S
AF Yan, Wenfu
   Overbury, Steven H.
   Dai, Sheng
BE Zhou, B
   Han, S
   Raja, R
   Somorjai, GA
TI Gold Catalysts Supported on Nanostructured Materials: Support Effects
SO NANOTECHNOLOGY IN CATALYSIS, VOL 3
SE Nanostructure Science and Technology
LA English
DT Article; Book Chapter
ID TEMPERATURE CO OXIDATION; ATOMIC LAYER DEPOSITION; SOL-GEL PROCESS; AU
   CATALYSTS; CARBON-MONOXIDE; AU/TIO2 CATALYSTS; AU/ZRO2 CATALYSTS;
   TITANIUM-DIOXIDE; PARTICLE-SIZE; METAL-OXIDES
C1 [Yan, Wenfu; Overbury, Steven H.; Dai, Sheng] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Dai, S (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM dais@ornl.gov
NR 52
TC 1
Z9 1
U1 0
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-0-387-34688-5
J9 NANOSTRUCT SCI TECHN
PY 2007
VL 3
BP 55
EP 71
DI 10.1007/978-0-387-34688-5_5
D2 10.1007/978-0-387-34688-5
PG 17
WC Chemistry, Applied; Engineering, Chemical; Nanoscience & Nanotechnology
SC Chemistry; Engineering; Science & Technology - Other Topics
GA BLQ33
UT WOS:000270789300006
ER

PT J
AU Mahurin, SM
   Cheng, MD
AF Mahurin, Shannon M.
   Cheng, Meng-Dawn
TI Generating nanoscale aggregates from colloidal nanoparticles by various
   aerosol spray techniques
SO NANOTOXICOLOGY
LA English
DT Article
DE Latex particles; ultrasonic; electrospray; aggregate morphology
ID UNIFORM PHOTONIC BALLS; ULTRASONIC ATOMIZATION; DRUG-DELIVERY;
   ELECTROSPRAY
AB Growing interest in the environmental and health effects of engineered nanostructured materials requires accurate control of cluster morphology and size in order to make valid interpretations of nanomaterial toxicity. Pressure-driven atomization/nebulization, ultrasonic generation, and electrospraying are common aerosol generation techniques that are currently used. Electrospray produced monodispersed isolated particles, when the original material was reasonably monodisperse, which may be most suited for use in experiments requiring single-size aerosol population. The technique however requires the use of a conductive solution that may not be suitable in biological experiments. Also, in the generation of single walled carbon nanohorns (SWNHs), we found that electrospray produced an anonymous peak that was not consistent with currently known SWNH nanostructures. This adds to an uncertainty about its utility in nanotoxicological experiments. Though producing controllable larger cluster sizes, ultrasonic generation might be a relatively straightforward process for reproducibly generating nanoparticle aggregates for nanotoxicological research. Note that the ultrasonic generation is not to be confused with sonication that is commonly used to homogenize a colloidal suspension. The aerosol population produced by a pressure-driven atomizer was very broad, suitable for experiments requiring a simple, easy means to deliver/disperse colloidal suspensions where size distribution is not a major concern. Advantages and disadvantages of each method are presented in relation to future toxicology experiments.
C1 [Mahurin, Shannon M.; Cheng, Meng-Dawn] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Mahurin, SM (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA.
EM mahurinsm@ornl.gov
RI Cheng, Meng-Dawn/C-1098-2012; 
OI Cheng, Meng-Dawn/0000-0003-1407-9576
FU Laboratory Directed Research and Development Program of Oak Ridge
   National Laboratory (ORNL); U. S. Department of Energy [AC05-00OR22725]
FX Research sponsored by the Laboratory Directed Research and Development
   Program of Oak Ridge National Laboratory (ORNL), managed by UT-Battelle,
   LLC for the U. S. Department of Energy under Contract No.
   DE-AC05-00OR22725. A portion of this research was conducted at the
   Center for Nanophase Materials Sciences as part of a CNMS user project,
   which is sponsored at Oak Ridge National Laboratory by the Division of
   Scientific User Facilities, U. S. Department of Energy.
NR 22
TC 3
Z9 3
U1 0
U2 6
PU INFORMA HEALTHCARE
PI NEW YORK
PA 52 VANDERBILT AVE, NEW YORK, NY 10017 USA
SN 1743-5390
J9 NANOTOXICOLOGY
JI Nanotoxicology
PY 2007
VL 1
IS 2
BP 130
EP 138
DI 10.1080/17435390701423760
PG 9
WC Nanoscience & Nanotechnology; Toxicology
SC Science & Technology - Other Topics; Toxicology
GA 363WA
UT WOS:000260296600006
ER

PT J
AU Lynch, RM
   Voy, BH
   Glass, DF
   Mahurin, SM
   Zhao, B
   Hu, H
   Saxton, AM
   Donnell, RL
   Cheng, MD
AF Lynch, Rachel M.
   Voy, Brynn H.
   Glass, Dana F.
   Mahurin, Shannon M.
   Zhao, Bin
   Hu, Hui
   Saxton, Arnold M.
   Donnell, Robert L.
   Cheng, Meng-Dawn
TI Assessing the pulmonary toxicity of single-walled carbon nanohorns
SO NANOTOXICOLOGY
LA English
DT Article
DE Single-walled carbon nanohorns; nanotoxicology; aspiration; inflammatory
ID ULTRAFINE PARTICLES; OXIDATIVE STRESS; NANOTUBES; GENE; CYTOTOXICITY;
   MACROPHAGES; EXPRESSION; LUNG; MICE
AB Previous studies have suggested that single-walled carbon nanotubes (SWCNTs) may pose a pulmonary hazard. We investigated the pulmonary toxicity of single-walled carbon nanohorns (SWCNHs), a relatively new carbon-based nanomaterial that is structurally similar to SWCNTs. Mice were exposed to 30 mg of surfactant-suspended SWCNHs or an equal volume of vehicle control by pharyngeal aspiration and sacrificed 24 hours or 7 days post-exposure. Total and differential cell counts and cytokine analysis of bronchoalveolar lavage fluid demonstrated a mild inflammatory response which was mitigated by day 7 post-exposure. Whole lung microarray analysis demonstrated that SWCNH-exposure did not lead to robust changes in gene expression. Finally, histological analysis showed no evidence of granuloma formation or fibrosis following SWCNH aspiration. These combined results suggest that SWCNH is a relatively innocuous nanomaterial when delivered to mice in vivo using aspiration as a delivery mechanism.
C1 [Glass, Dana F.; Mahurin, Shannon M.; Cheng, Meng-Dawn] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
   [Lynch, Rachel M.; Voy, Brynn H.] Oak Ridge Natl Lab, Biosci Div, Oak Ridge, TN 37831 USA.
   [Zhao, Bin] Oak Ridge Natl Lab, Ctr Nanophase, Div Mat Sci, Oak Ridge, TN 37831 USA.
   [Hu, Hui] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
   [Saxton, Arnold M.] Univ Tennessee, Dept Anim Sci, Knoxville, TN 37901 USA.
   [Donnell, Robert L.] Univ Tennessee, Coll Vet Med, Knoxville, TN 37901 USA.
RP Cheng, MD (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008,MS6038, Oak Ridge, TN 37831 USA.
EM chengmd@ornl.gov
RI Cheng, Meng-Dawn/C-1098-2012; 
OI Donnell, Robert L./0000-0002-6778-954X; Cheng,
   Meng-Dawn/0000-0003-1407-9576
NR 26
TC 34
Z9 35
U1 0
U2 12
PU INFORMA HEALTHCARE
PI NEW YORK
PA 52 VANDERBILT AVE, NEW YORK, NY 10017 USA
SN 1743-5390
J9 NANOTOXICOLOGY
JI Nanotoxicology
PY 2007
VL 1
IS 2
BP 157
EP 166
DI 10.1080/17435390701598496
PG 10
WC Nanoscience & Nanotechnology; Toxicology
SC Science & Technology - Other Topics; Toxicology
GA 363WA
UT WOS:000260296600009
ER

PT J
AU Peng, JC
   Karpen, GH
AF Peng, Jamy C.
   Karpen, Gary H.
TI H3K9 methylation and RNA interference regulate nucleolar organization
   and repeated DNA stability
SO NATURE CELL BIOLOGY
LA English
DT Article
ID POSITION-EFFECT VARIEGATION; SISTER-CHROMATID COHESION;
   DROSOPHILA-MELANOGASTER; MAMMALIAN CHROMATIN; EPIGENETIC CONTROL;
   GENE-EXPRESSION; FISSION YEAST; LIGASE IV; HETEROCHROMATIN;
   TRANSCRIPTION
AB Investigations aimed at identifying regulators of nuclear architecture in Drosophila demonstrated that cells lacking H3K9 methylation and RNA interference (RNAi) pathway components displayed disorganized nucleoli, ribosomal DNA (rDNA) and satellite DNAs. The levels of H3K9 dimethylation (H3K9me2) in chromatin associated with repeated DNAs decreased dramatically in Su(var)3-9 and dcr-2 (dicer-2) mutant tissues compared with wild type. We also observed a substantial increase in extrachromosomal circular (ecc) repeated DNAs in mutant tissues. The disorganized nucleolus phenotype depends on the presence of Ligase 4 and ecc DNA formation is not induced by removal of cohesin. We conclude that the structural integrity and organization of repeated DNAs and nucleoli are regulated by the H3K9 methylation and RNAi pathways, and other regulators of heterochromatin-mediated silencing. In addition, repeated DNA stability involves suppression of non-homologous end joining (NHEJ) or other recombination pathways. These results suggest a mechanism for how local chromatin structure can regulate genome stability, and the organization of chromosomal elements and nuclear organelles.
C1 Lawrence Berkeley Natl Lab, Dept Genom & Bioinformat, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
RP Karpen, GH (reprint author), Lawrence Berkeley Natl Lab, Dept Genom & Bioinformat, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM karpen@fruitfly.org
FU NIGMS NIH HHS [R01 GM061169-04, R01 GM066272, R01 GM061169, R01GM061169]
NR 60
TC 182
Z9 192
U1 0
U2 11
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1465-7392
J9 NAT CELL BIOL
JI Nat. Cell Biol.
PD JAN
PY 2007
VL 9
IS 1
BP 25
EP U24
DI 10.1038/ncb1514
PG 13
WC Cell Biology
SC Cell Biology
GA 122VL
UT WOS:000243255100009
PM 17159999
ER

PT J
AU Tartaglia, M
   Pennacchio, LA
   Zhao, C
   Yadav, KK
   Fodale, V
   Sarkozy, A
   Pandit, B
   Oishi, K
   Martinelli, S
   Schackwitz, W
   Ustaszewska, A
   Martin, J
   Bristow, J
   Carta, C
   Lepri, F
   Neri, C
   Vasta, I
   Gibson, K
   Curry, CJ
   Siguero, JPL
   Digilio, MC
   Zampino, G
   Dallapiccola, B
   Bar-Sagi, D
   Gelb, BD
AF Tartaglia, Marco
   Pennacchio, Len A.
   Zhao, Chen
   Yadav, Kamlesh K.
   Fodale, Valentina
   Sarkozy, Anna
   Pandit, Bhaswati
   Oishi, Kimihiko
   Martinelli, Simone
   Schackwitz, Wendy
   Ustaszewska, Anna
   Martin, Joel
   Bristow, James
   Carta, Claudio
   Lepri, Francesca
   Neri, Cinzia
   Vasta, Isabella
   Gibson, Kate
   Curry, Cynthia J.
   Lopez Siguero, Juan Pedro
   Digilio, Maria Cristina
   Zampino, Giuseppe
   Dallapiccola, Bruno
   Bar-Sagi, Dafna
   Gelb, Bruce D.
TI Gain-of-function SOS1 mutations cause a distinctive form of Noonan
   syndrome
SO NATURE GENETICS
LA English
DT Article
ID FACIO-CUTANEOUS SYNDROME; RAS ACTIVATOR SON; PTPN11 MUTATIONS; GERMLINE
   MUTATIONS; PHENOTYPE; SEVENLESS; GENE; KRAS; MUTANTS; PATHWAY
AB Noonan syndrome is a developmental disorder characterized by short stature, facial dysmorphia, congenital heart defects and skeletal anomalies(1). Increased RAS-mitogen-activated protein kinase (MAPK) signaling due to PTPN11 and KRAS mutations causes 50% of cases of Noonan syndrome(2-6). Here, we report that 22 of 129 individuals with Noonan syndrome without PTPN11 or KRAS mutation have missense mutations in SOS1, which encodes a RAS-specific guanine nucleotide exchange factor. SOS1 mutations cluster at codons encoding residues implicated in the maintenance of SOS1 in its autoinhibited form. In addition, ectopic expression of two Noonan syndrome-associated mutants induces enhanced RAS and ERK activation. The phenotype associated with SOS1 defects lies within the Noonan syndrome spectrum but is distinctive, with a high prevalence of ectodermal abnormalities but generally normal development and linear growth. Our findings implicate gain-of-function mutations in a RAS guanine nucleotide exchange factor in disease for the first time and define a new mechanism by which upregulation of the RAS pathway can profoundly change human development.
C1 Ist Super Sanita, Dipartimento Biol Cellulare & Neurosci, I-00161 Rome, Italy.
   Lawrence Berkeley Lab, Div Genom, Berkeley, CA 94720 USA.
   US DOE, Joint Genome Inst, Walnut Creek, CA 94598 USA.
   NYU, Sch Med, Dept Biochem, New York, NY 10016 USA.
   Ist Ricovero & Cura Carattere Sci, San Giovanni Rotondo & CSS Mendel Inst, I-00198 Rome, Italy.
   Univ Roma La Sapienza, Dept Expt Med & Pathol, I-00198 Rome, Italy.
   Mt Sinai Sch Med, Ctr Mol Cardiol, New York, NY 10029 USA.
   Mt Sinai Sch Med, Dept Pediat, New York, NY 10029 USA.
   Mt Sinai Sch Med, Dept Human Genet, New York, NY 10029 USA.
   Univ Cattolica Sacro Cuore, Ist Clin Pediat, I-00168 Rome, Italy.
   Royal Childrens Hosp, Herston, Qld 4029, Australia.
   Genet Med Cent Florida, Fresno, CA 93710 USA.
   Hosp Materno Infantil, Malaga 29011, Spain.
   Osped Bambino Gesu, I-00165 Rome, Italy.
RP Tartaglia, M (reprint author), Ist Super Sanita, Dipartimento Biol Cellulare & Neurosci, Viale Regina Elena 299, I-00161 Rome, Italy.
EM mtartaglia@iss.it; bruce.gelb@mssm.edu
RI zhao, chen/C-7358-2011; Carta, Claudio/A-7305-2013; Dallapiccola,
   Bruno/K-8692-2016; 
OI Lepri, Francesca Romana/0000-0001-5331-0473; Dallapiccola,
   Bruno/0000-0002-5031-1013; Tartaglia, Marco/0000-0001-7736-9672
FU NCI NIH HHS [CA28146, CA55360]; NHLBI NIH HHS [HL71207, HL074728]; NICHD
   NIH HHS [HD01294]; Telethon [GGP04172]
NR 28
TC 281
Z9 298
U1 5
U2 18
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK STREET, 9TH FLOOR, NEW YORK, NY 10013-1917 USA
SN 1061-4036
J9 NAT GENET
JI Nature Genet.
PD JAN
PY 2007
VL 39
IS 1
BP 75
EP 79
DI 10.1038/ng1939
PG 5
WC Genetics & Heredity
SC Genetics & Heredity
GA 121CU
UT WOS:000243136500020
PM 17143282
ER

PT J
AU Thiel, P
AF Thiel, Patricia
TI Quasicrystals - When all pieces fit together
SO NATURE MATERIALS
LA English
DT News Item
ID ALLOYS
AB The complete atomic distribution of a binary natural quasicrystal has been achieved by complementing X-ray diffraction patterns with the structure of closely related crystals. The result represents an essential starting point to find the atomic structure of more complex quasicrystals.
C1 Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA.
RP Thiel, P (reprint author), Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA.
EM thiel@ameslab.gov
NR 10
TC 12
Z9 12
U1 0
U2 7
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1476-1122
EI 1476-4660
J9 NAT MATER
JI Nat. Mater.
PD JAN
PY 2007
VL 6
IS 1
BP 11
EP 12
DI 10.1038/nmat1814
PG 3
WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
   Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 122KI
UT WOS:000243225400011
PM 17199119
ER

PT J
AU Iota, V
   Yoo, CS
   Klepeis, JH
   Jenei, Z
   Evans, W
   Cynn, H
AF Iota, Valentin
   Yoo, Choong-Shik
   Klepeis, Jae-Hyun
   Jenei, Zsolt
   Evans, William
   Cynn, Hyunchae
TI Six-fold coordinated carbon dioxide VI
SO NATURE MATERIALS
LA English
DT Article
ID HIGH-PRESSURE; CRYSTAL-STRUCTURE; SOLID CO2; TEMPERATURE; PHASE;
   STISHOVITE
AB Under standard conditions, carbon dioxide ( CO2) is a simple molecular gas and an important atmospheric constituent, whereas silicon dioxide ( SiO2) is a covalent solid, and one of the fundamental minerals of the planet. The remarkable dissimilarity between these two group IV oxides is diminished at higher pressures and temperatures as CO2 transforms to a series of solid phases, from simple molecular to a fully covalent extended-solid V, structurally analogous to SiO2 tridymite. Here, we present the discovery of an extended-solid phase of CO2: a sixfold coordinated stishovite- like phase VI, obtained by isothermal compression of associated CO2-II ( refs 1,2) above 50 GPa at 530-650 K. Together with the previously reported CO2-V ( refs 3-5) and a-carbonia(6), this extended phase indicates a fundamental similarity between CO2 ( a prototypical molecular solid) and SiO2 ( one of Earth's fundamental building blocks). We present a phase diagram with a limited stability domain for molecular CO2-I, and suggest that the conversion to extended-network solids above 40 50 GPa occurs via intermediate phases II ( refs 1,2), III ( refs 7,8) and IV ( refs 9,10). The crystal structure of phase VI suggests strong disorder along the c axis in stishovite- like P4(2)/mnm, with carbon atoms manifesting an average six-fold coordination within the framework of sp(3) hybridization.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Iota, V (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM iota1@llnl.gov; yoo1@llnl.gov
RI Jenei, Zsolt/B-3475-2011
NR 22
TC 79
Z9 81
U1 2
U2 24
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1476-1122
J9 NAT MATER
JI Nat. Mater.
PD JAN
PY 2007
VL 6
IS 1
BP 34
EP 38
DI 10.1038/nmat1800
PG 5
WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
   Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 122KI
UT WOS:000243225400016
PM 17160005
ER

PT J
AU Fischer, W
   Perkins, S
   Theiler, J
   Bhattacharya, T
   Yusim, K
   Funkhouser, R
   Kuiken, C
   Haynes, B
   Letvin, NL
   Walker, BD
   Hahn, BH
   Korber, BT
AF Fischer, Will
   Perkins, Simon
   Theiler, James
   Bhattacharya, Tanmoy
   Yusim, Karina
   Funkhouser, Robert
   Kuiken, Carla
   Haynes, Barton
   Letvin, Norman L.
   Walker, Bruce D.
   Hahn, Beatrice H.
   Korber, Bette T.
TI Polyvalent vaccines for optimal coverage of potential T-cell epitopes in
   global HIV-1 variants
SO NATURE MEDICINE
LA English
DT Article
ID HUMAN-IMMUNODEFICIENCY-VIRUS; RHESUS-MONKEYS; LYMPHOCYTE ESCAPE; VIRAL
   ESCAPE; TYPE-1; RESPONSES; INFECTION; IMMUNOGENICITY; ENVELOPE; AIDS
AB HIV-1/AIDS vaccines must address the extreme diversity of HIV-1. We have designed new polyvalent vaccine antigens comprised of sets of 'mosaic' proteins, assembled from fragments of natural sequences via a computational optimization method. Mosaic proteins resemble natural proteins, and a mosaic set maximizes the coverage of potential T-cell epitopes (peptides of nine amino acids) for a viral population. We found that coverage of viral diversity using mosaics was greatly increased compared to coverage by natural-sequence vaccine candidates, for both variable and conserved proteins; for conserved HIV-1 proteins, global coverage may be feasible. For example, four mosaic proteins perfectly matched 74% of 9-amino-acid potential epitopes in global Gag sequences; 87% of potential epitopes matched at least 8 of 9 positions. In contrast, a single natural Gag protein covered only 37% (9 of 9) and 67% (8 of 9). Mosaics provide diversity coverage comparable to that afforded by thousands of separate peptides, but, because the fragments of natural proteins are compressed into a small number of native-like proteins, they are tractable for vaccines.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Santa Fe Inst, Santa Fe, NM 87501 USA.
   Duke Univ, Dept Med, Durham, NC 27710 USA.
   Harvard Univ, Beth Israel Deaconess Med Ctr, Boston, MA 02115 USA.
   Harvard Univ, Massachusetts Gen Hosp, Sch Med, Charlestown, MA 02129 USA.
   Univ Alabama, Birmingham, AL 35294 USA.
RP Korber, BT (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM btk@lanl.gov
RI Fischer, Will/B-1323-2013; Bhattacharya, Tanmoy/J-8956-2013; 
OI Fischer, Will/0000-0003-4579-4062; Bhattacharya,
   Tanmoy/0000-0002-1060-652X; Korber, Bette/0000-0002-2026-5757
FU NIAID NIH HHS [P01 AI061734-01, R21 AI055421-01-A1]; PHS HHS [N01-15442]
NR 32
TC 224
Z9 228
U1 1
U2 7
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK STREET, 9TH FLOOR, NEW YORK, NY 10013-1917 USA
SN 1078-8956
J9 NAT MED
JI Nat. Med.
PD JAN
PY 2007
VL 13
IS 1
BP 100
EP 106
DI 10.1038/nm1461
PG 7
WC Biochemistry & Molecular Biology; Cell Biology; Medicine, Research &
   Experimental
SC Biochemistry & Molecular Biology; Cell Biology; Research & Experimental
   Medicine
GA 123NE
UT WOS:000243301800043
PM 17187074
ER

PT J
AU Taussig, MJ
   Stoevesandt, O
   Borrebaeck, CAK
   Bradbury, AR
   Cahill, D
   Cambillau, C
   de Daruvar, A
   Dubel, S
   Eichler, J
   Frank, R
   Gibson, TJ
   Gloriam, D
   Gold, L
   Herberg, FW
   Hermjakob, H
   Hoheisel, JD
   Joos, TO
   Kallioniemi, O
   Koegll, M
   Konthur, Z
   Korn, B
   Kremmer, E
   Krobitsch, S
   Landegren, U
   van der Maarel, S
   McCafferty, J
   Muyldermans, S
   Nygren, PA
   Palcy, S
   Pluckthun, A
   Polic, B
   Przybylski, M
   Saviranta, P
   Sawyer, A
   Sherman, DJ
   Skerra, A
   Templin, M
   Ueffing, M
   Uhlen, M
AF Taussig, Michael J.
   Stoevesandt, Oda
   Borrebaeck, Carl A. K.
   Bradbury, Andrew R.
   Cahill, Dolores
   Cambillau, Christian
   de Daruvar, Antoine
   Duebel, Stefan
   Eichler, Jutta
   Frank, Ronald
   Gibson, Toby J.
   Gloriam, David
   Gold, Larry
   Herberg, Friedrich W.
   Hermjakob, Henning
   D Hoheisel, Joerg
   O Joos, Thomas
   Kallioniemi, Olli
   Koegll, Manfred
   Konthur, Zoltan
   Korn, Bernhard
   Kremmer, Elisabeth
   Krobitsch, Sylvia
   Landegren, Ulf
   van der Maarel, Silvere
   McCafferty, John
   Muyldermans, Serge
   Nygren, Per-Ake
   Palcy, Sandrine
   Plueckthun, Andreas
   Polic, Bojan
   Przybylski, Michael
   Saviranta, Petri
   Sawyer, Alan
   Sherman, David J.
   Skerra, Arne
   Templin, Markus
   Ueffing, Marius
   Uhlen, Mathias
TI ProteomeBinders: planning a European resource of affinity reagents for
   analysis of the human proteome
SO NATURE METHODS
LA English
DT Article
ID BINDING-PROTEINS; PROXIMITY LIGATION; ESCHERICHIA-COLI; PHAGE DISPLAY;
   LIBRARIES; SELECTION; MICROARRAYS; EXPRESSION; ANTIBODIES; COMPLEXES
AB ProteomeBinders is a new European consortium aiming to establish a comprehensive resource of well-characterized affinity reagents, including but not limited to antibodies, for analysis of the human proteome. Given the huge diversity of the proteome, the scale of the project is potentially immense but nevertheless feasible in the context of a pan-European or even worldwide coordination.
C1 Babraham Inst, Technol Res Grp, Cambridge CB22 3AT, England.
   Lund Univ, Dept Immunotechnol, SE-22184 Lund, Sweden.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Univ Coll Dublin, Conway Inst, Dublin 4, Ireland.
   Univ Aix Marseille 1, CNRS, F-13288 Marseille 09, France.
   Univ Aix Marseille 2, CNRS, F-13288 Marseille 09, France.
   Univ Bordeaux 2, Ctr Bioinformat, F-33076 Bordeaux, France.
   Tech Univ Carolo Wilhelmina Braunschweig, Inst Biochem & Biotechnol, D-38106 Braunschweig, Germany.
   Helmholtz Ctr Infect Res, D-38124 Braunschweig, Germany.
   European Mol Biol Lab, D-69117 Heidelberg, Germany.
   European Bioinformat Inst, Cambridge CB10 1SD, England.
   SomaLogic Inc, Boulder, CO 80301 USA.
   Univ Kassel, Dept Biochem, D-34132 Kassel, Germany.
   German Canc Res Ctr, D-69120 Heidelberg, Germany.
   Univ Tubingen, Nat & Med Sci Inst, D-72770 Tubingen, Germany.
   Tech Res Ctr Finland, VTT, FIN-20521 Turku, Finland.
   Resource Ctr Genome Res, D-69120 Heidelberg, Germany.
   GSF, Natl Res Ctr Environm & Hlth, D-85764 Munich, Germany.
   Max Planck Inst Mol Genet, D-14195 Berlin, Germany.
   Uppsala Univ, Dept Genet & Pathol, Rudbeck Lab, SE-75185 Uppsala, Sweden.
   Leiden Univ, Med Ctr, NL-2300 RC Leiden, Netherlands.
   Wellcome Trust Sanger Inst, Cambridge CB10 1SA, England.
   Vrije Univ Brussels, B-1050 Brussels, Belgium.
   AlbaNova Univ Ctr, Royal Inst Technol, SE-10691 Stockholm, Sweden.
   Univ Zurich, Dept Biochem, CH-8057 Zurich, Switzerland.
   Univ Rijeka, Fac Med, HR-51000 Rijeka, Croatia.
   Univ Konstanz, Dept Chem, D-78457 Constance, Germany.
   European Mol Biol Lab, I-00015 Monterotondo, Italy.
   Lab Bordelais Rech Informat, F-33405 Talence, France.
   Tech Univ Munich, Lehrstuhl Biol Chem, D-85350 Freising Weihenstephan, Germany.
RP Taussig, MJ (reprint author), Babraham Inst, Technol Res Grp, Cambridge CB22 3AT, England.
EM mike.taussig@bbsrc.ac.uk
RI Gloriam, David/A-1904-2011; Kallioniemi, Olli/H-5111-2011; Kallioniemi,
   Olli/H-4738-2012; Herberg, Friedrich/B-5572-2015; Pluckthun,
   Andreas/C-2746-2009; Konthur, Zoltan/E-4575-2010; Muyldermans,
   Serge/C-6418-2016; Polic, Bojan/B-8622-2014; 
OI Bradbury, Andrew/0000-0002-5567-8172; Dubel, Stefan/0000-0001-8811-7390;
   Nygren, Per-Ake/0000-0003-4214-6991; Hermjakob,
   Henning/0000-0001-8479-0262; Kallioniemi, Olli/0000-0002-3231-0332;
   Kallioniemi, Olli/0000-0002-3231-0332; Herberg,
   Friedrich/0000-0001-7117-7653; Pluckthun, Andreas/0000-0003-4191-5306;
   Konthur, Zoltan/0000-0002-8767-9823; Muyldermans,
   Serge/0000-0002-3678-3575; Polic, Bojan/0000-0003-3930-9630; Gibson,
   Toby James/0000-0003-0657-5166
NR 39
TC 169
Z9 173
U1 2
U2 23
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1548-7091
J9 NAT METHODS
JI Nat. Methods
PD JAN
PY 2007
VL 4
IS 1
BP 13
EP 17
DI 10.1038/nmeth0107-13
PG 5
WC Biochemical Research Methods
SC Biochemistry & Molecular Biology
GA 122KK
UT WOS:000243225600008
PM 17195019
ER

PT J
AU Woodward, JJ
   Martin, NI
   Marletta, MA
AF Woodward, Joshua J.
   Martin, Nathaniel I.
   Marletta, Michael A.
TI An Escherichia coli expression-based method for heme substitution
SO NATURE METHODS
LA English
DT Article
ID HORSERADISH-PEROXIDASE; PROTEIN INTERACTIONS; MYOGLOBIN; BINDING; NMR
AB Heme reconstitution with porphyrin analogs is a powerful approach toward understanding the molecular function of heme proteins; present methods, however, have not proven to be generally useful. Here we describe the development and application of an expression-based method for introducing modified porphyrins. The approach allows efficient incorporation of heme analogs using a widely available bacterial strain and offers an attractive alternative to present reconstitution methods that subject proteins to harsh, denaturing conditions. (c) 2007 Nature Publishing Group.
C1 Univ Calif Berkeley, Dept Chem, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Mol & Cell Biol, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Div Phys Biosci, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Marletta, MA (reprint author), Univ Calif Berkeley, Dept Chem, Lawrence Berkeley Natl Lab, 211 Lewis Hall, Berkeley, CA 94720 USA.
EM marletta@berkeley.edu
NR 15
TC 33
Z9 33
U1 1
U2 21
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1548-7091
J9 NAT METHODS
JI Nat. Methods
PD JAN
PY 2007
VL 4
IS 1
BP 43
EP 45
DI 10.1038/NMETH984
PG 3
WC Biochemical Research Methods
SC Biochemistry & Molecular Biology
GA 122KK
UT WOS:000243225600016
PM 17187078
ER

PT J
AU McHardy, AC
   Martin, HG
   Tsirigos, A
   Hugenholtz, P
   Rigoutsos, I
AF McHardy, Alice Carolyn
   Garcia Martin, Hector
   Tsirigos, Aristotelis
   Hugenholtz, Philip
   Rigoutsos, Isidore
TI Accurate phylogenetic classification of variable-length DNA fragments
SO NATURE METHODS
LA English
DT Article
ID GENOMIC SIGNATURE; GENE-TRANSFER; CODON USAGE; SEQUENCES; BACTERIA;
   RECONSTRUCTION; COMMUNITIES; PROJECT
AB Metagenome studies have retrieved vast amounts of sequence data from a variety of environments leading to new discoveries and insights into the uncultured microbial world. Except for very simple communities, the encountered diversity has made fragment assembly and the subsequent analysis a challenging problem. A taxonomic characterization of metagenomic fragments is required for a deeper understanding of shotgun-sequenced microbial communities, but success has mostly been limited to sequences containing phylogenetic marker genes. Here we present PhyloPythia, a composition-based classifier that combines higher-level generic clades from a set of 340 completed genomes with sample-derived population models. Extensive analyses on synthetic and real metagenome data sets showed that PhyloPythia allows the accurate classification of most sequence fragments across all considered taxonomic ranks, even for unknown organisms. The method requires no more than 100 kb of training sequence for the creation of accurate models of sample-specific populations and can assign fragments >= 1 kb with high specificity. (c) 2007 Nature Publishing Group.
C1 IBM Corp, Thomas J Watson Res Ctr, Bioinformat & Pattern Discovery Grp, Yorktown Hts, NY 10598 USA.
   US DOE, Joint Genome Inst, Walnut Creek, CA 94598 USA.
RP Rigoutsos, I (reprint author), IBM Corp, Thomas J Watson Res Ctr, Bioinformat & Pattern Discovery Grp, 1101 Kitchawan Rd, Yorktown Hts, NY 10598 USA.
EM rigoutso@us.ibm.com
RI Garcia Martin, Hector/B-5357-2009; Hugenholtz, Philip/G-9608-2011; 
OI Garcia Martin, Hector/0000-0002-4556-9685; Rigoutsos,
   Isidore/0000-0003-1529-8631; hugenholtz, philip/0000-0001-5386-7925;
   Tsirigos, Aristotelis/0000-0002-7512-8477
NR 35
TC 247
Z9 259
U1 1
U2 30
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1548-7091
J9 NAT METHODS
JI Nat. Methods
PD JAN
PY 2007
VL 4
IS 1
BP 63
EP 72
DI 10.1038/NMETH976
PG 10
WC Biochemical Research Methods
SC Biochemistry & Molecular Biology
GA 122KK
UT WOS:000243225600020
PM 17179938
ER

PT J
AU Balabas, MV
   Sushkov, AO
   Budker, D
AF Balabas, M. V.
   Sushkov, A. O.
   Budker, D.
TI Rubidium 'whiskers' in a vapour cell
SO NATURE PHYSICS
LA English
DT Letter
C1 SI Vavilov State Opt Inst, St Petersburg 199034, Russia.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RP Budker, D (reprint author), SI Vavilov State Opt Inst, St Petersburg 199034, Russia.
EM budker@berkeley.edu
RI Balabas, Mikhail/A-5273-2012; Budker, Dmitry/F-7580-2016
OI Balabas, Mikhail/0000-0002-5383-7897; Budker, Dmitry/0000-0002-7356-4814
NR 6
TC 14
Z9 14
U1 1
U2 7
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1745-2473
J9 NAT PHYS
JI Nat. Phys.
PD JAN
PY 2007
VL 3
IS 1
BP 2
EP 2
DI 10.1038/nphys496
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 129LB
UT WOS:000243729900002
ER

PT J
AU Maslov, S
AF Maslov, Sergei
TI Complex networks - Role model for modules
SO NATURE PHYSICS
LA English
DT News Item
C1 Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
RP Maslov, S (reprint author), Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
EM maslov@bnl.gov
RI Maslov, Sergei/C-2397-2009
OI Maslov, Sergei/0000-0002-3701-492X
NR 8
TC 4
Z9 4
U1 0
U2 2
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1745-2473
J9 NAT PHYS
JI Nat. Phys.
PD JAN
PY 2007
VL 3
IS 1
BP 18
EP 19
DI 10.1038/nphys493
PG 3
WC Physics, Multidisciplinary
SC Physics
GA 129LB
UT WOS:000243729900010
ER

PT J
AU Bostwick, A
   Ohta, T
   Seyller, T
   Horn, K
   Rotenberg, E
AF Bostwick, Aaron
   Ohta, Taisuke
   Seyller, Thomas
   Horn, Karsten
   Rotenberg, Eli
TI Quasiparticle dynamics in graphene
SO NATURE PHYSICS
LA English
DT Article
ID ANGLE-RESOLVED PHOTOEMISSION; WALLED CARBON NANOTUBES;
   ELECTRONIC-STRUCTURE; DIRAC FERMIONS; EFFECTIVE-MASS; SURFACE-STATE;
   BERRYS PHASE; GRAPHITE; SUPERCONDUCTIVITY; ENERGY
AB The effectively massless, relativistic behaviour of graphene's charge carriers-known as Dirac fermions-is a result of its unique electronic structure, characterized by conical valence and conduction bands that meet at a single point in momentum space (at the Dirac crossing energy). The study of many-body interactions amongst the charge carriers in graphene and related systems such as carbon nanotubes, fullerenes and graphite is of interest owing to their contribution to superconductivity and other exotic ground states in these systems. Here we show, using angle-resolved photoemission spectroscopy, that electron-plasmon coupling plays an unusually strong role in renormalizing the bands around the Dirac crossing energy-analogous to mass renormalization by electron-boson coupling in ordinary metals. Our results show that electron-electron, electron-plasmon and electron-phonon coupling must be considered on an equal footing in attempts to understand the dynamics of quasiparticles in graphene and related systems.
C1 EO Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
   Max Planck Gesell, Fritz Haber Inst, Dept Mol Phys, D-14195 Berlin, Germany.
   Univ Erlangen Nurnberg, Inst Phys Kondensierten Mat, Lehrstuhl Tech Phys, D-91058 Erlangen, Germany.
RP Rotenberg, E (reprint author), EO Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
EM erotenberg@lbl.gov
RI Rotenberg, Eli/B-3700-2009; Seyller, Thomas/F-8410-2011; Bostwick,
   Aaron/E-8549-2010
OI Rotenberg, Eli/0000-0002-3979-8844; Seyller, Thomas/0000-0002-4953-2142;
   
NR 42
TC 696
Z9 699
U1 32
U2 235
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1745-2473
EI 1745-2481
J9 NAT PHYS
JI Nat. Phys.
PD JAN
PY 2007
VL 3
IS 1
BP 36
EP 40
DI 10.1038/nphys477
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 129LB
UT WOS:000243729900015
ER

PT J
AU Nam, JM
   Jang, KJ
   Groves, JT
AF Nam, Jwa-Min
   Jang, Kyung-Jin
   Groves, Jay T.
TI Detection of proteins using a colorimetric bio-barcode assay
SO NATURE PROTOCOLS
LA English
DT Article
ID ROLLING-CIRCLE AMPLIFICATION; NANOPARTICLE PROBES; SENSITIVITY;
   POLYNUCLEOTIDES; MICROARRAYS; CYTOKINES
AB The colorimetric bio-barcode assay is a red-to-blue color change-based protein detection method with ultrahigh sensitivity. This assay is based on both the bio-barcode amplification method that allows for detecting miniscule amount of targets with attomolar sensitivity and gold nanoparticle-based colorimetric DNA detection method that allows for a simple and straightforward detection of biomolecules of interest (here we detect interleukin-2, an important biomarker (cytokine) for many immunodeficiency-related diseases and cancers). The protocol is composed of the following steps: (i) conjugation of target capture molecules and barcode DNA strands onto silica microparticles, (ii) target capture with probes, (iii) separation and release of barcode DNA strands from the separated probes, (iv) detection of released barcode DNA using DNA-modified gold nanoparticle probes and (v) red-to-blue color change analysis with a graphic software. Actual target detection and quantification steps with premade probes take similar to 3 h (whole protocol including probe preparations takes similar to 3 days).
C1 [Nam, Jwa-Min] Seoul Natl Univ, Dept Chem, Seoul 151747, South Korea.
   [Nam, Jwa-Min; Jang, Kyung-Jin] Seoul Natl Univ, Interdisciplinary Program Nanosci & Technol, Seoul 151747, South Korea.
   [Groves, Jay T.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Groves, Jay T.] Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Nam, JM (reprint author), Seoul Natl Univ, Dept Chem, San 56-1, Seoul 151747, South Korea.
EM jmnam@snu.ac.kr; JTGroves@lbl.gov
NR 20
TC 68
Z9 74
U1 1
U2 51
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1754-2189
J9 NAT PROTOC
JI Nat. Protoc.
PY 2007
VL 2
IS 6
BP 1438
EP 1444
DI 10.1038/nprot.2007.201
PG 7
WC Biochemical Research Methods
SC Biochemistry & Molecular Biology
GA 262HF
UT WOS:000253138900014
PM 17545980
ER

PT J
AU Laughlin, ST
   Bertozzi, CR
AF Laughlin, Scott T.
   Bertozzi, Carolyn R.
TI Metabolic labeling of glycans with azido sugars and subsequent
   glycan-profiling and visualization via Staudinger ligation
SO NATURE PROTOCOLS
LA English
DT Article
ID GLCNAC-MODIFIED PROTEINS; O-LINKED GLYCOSYLATION; LIVING ANIMALS;
   GLYCOPROTEOMICS; STRATEGY; ALKYNE
AB Metabolic labeling of glycans with a bioorthogonal chemical reporter such as the azide enables their visualization in cells and organisms as well as the enrichment of specific glycoprotein types for proteomic analysis. This process involves two steps. Azido sugars are fed to cells or organisms and integrated by the glycan biosynthetic machinery into various glycoconjugates. The azido sugars are then covalently tagged with imaging probes or epitope tags, either ex vivo or in vivo, using an azide-specific reaction. This protocol details the syntheses of the azido sugars N-azidoacetylmannosamine (ManNAz), N-azidoacetylgalactosamine (GalNAz), N-azidoacetylglucosamine (GlcNAz) and 6-azidofucose (6AzFuc), and the detection reagents phosphine-FLAG and phosphine-FLAG-His(6). Applications to the visualization of cellular glycans and enrichment of glycoproteins for proteomic analysis are described. The synthesis of the azido sugars ( ManNAz, GalNAz, GlcNAz or 6AzFuc) or detection reagents (phosphine-FLAG or phosphine-FLAG-His(6)) can be completed in approximately 1 week. A cell metabolic labeling experiment can be completed in approximately 4 d.
C1 [Laughlin, Scott T.; Bertozzi, Carolyn R.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Bertozzi, Carolyn R.] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
   [Bertozzi, Carolyn R.] Howard Hughes Med Inst, Chevy Chase, MD 20815 USA.
   [Bertozzi, Carolyn R.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Bertozzi, CR (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM crb@berkeley.edu
NR 19
TC 107
Z9 107
U1 8
U2 71
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1754-2189
J9 NAT PROTOC
JI Nat. Protoc.
PY 2007
VL 2
IS 11
BP 2930
EP 2944
DI 10.1038/nprot.2007.422
PG 15
WC Biochemical Research Methods
SC Biochemistry & Molecular Biology
GA 262HQ
UT WOS:000253140000033
PM 18007630
ER

PT J
AU Fraser, CS
   Doudna, JA
AF Fraser, Christopher S.
   Doudna, Jennifer A.
TI Structural and mechanistic insights into hepatitis C viral translation
   initiation
SO NATURE REVIEWS MICROBIOLOGY
LA English
DT Review
ID INTERNAL RIBOSOME ENTRY; SWINE-FEVER VIRUS; CAP-INDEPENDENT TRANSLATION;
   5' NONTRANSLATED REGIONS; EUKARYOTIC TRANSLATION; PROTEIN-SYNTHESIS;
   MESSENGER-RNA; MEDIATED TRANSLATION; 80S RIBOSOME; MUTATIONAL ANALYSIS
AB Hepatitis C virus uses an internal ribosome entry site (IRES) to control viral protein synthesis by directly recruiting ribosomes to the translation-start site in the viral mRNA. Structural insights coupled with biochemical studies have revealed that the IRES substitutes for the activities of translation-initiation factors by binding and inducing conformational changes in the 40S ribosomal subunit. Direct interactions of the IRES with initiation factor elF3 are also crucial for efficient translation initiation, providing clues to the role of elF3 in protein synthesis.
C1 Univ Calif Berkeley, Dept Mol & Cell Biol, Howard Hughes Med Inst, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Chem, Howard Hughes Med Inst, Berkeley, CA 94720 USA.
   Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Doudna, JA (reprint author), Univ Calif Berkeley, Dept Mol & Cell Biol, Howard Hughes Med Inst, Berkeley, CA 94720 USA.
EM doudna@berkeley.edu
NR 94
TC 122
Z9 123
U1 1
U2 5
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1740-1526
J9 NAT REV MICROBIOL
JI Nat. Rev. Microbiol.
PD JAN
PY 2007
VL 5
IS 1
BP 29
EP 38
DI 10.1038/nrmicro1558
PG 10
WC Microbiology
SC Microbiology
GA 122OK
UT WOS:000243236100011
PM 17128284
ER

PT S
AU Ramaswamy, V
   Cuellar, L
   Eidenbenz, S
   Hengartner, N
   Ambuhl, C
   Weber, B
AF Ramaswamy, Venkatesh
   Cuellar, Leticia
   Eidenbenz, Stephan
   Hengartner, Nicolas
   Ambuehl, Christoph
   Weber, Birgitta
BE Akyildiz, IF
   Sivakumar, R
   Ekici, E
   DeOliveira, JC
   McNair, J
TI Light-weight control of non-responsive traffic with low buffer
   requirements
SO NETWORKING 2007: AD HOC AND SENSOR NETWORKS, WIRELESS NETWORKS, NEXT
   GENERATION INTERNET, PROCEEDINGS
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 6th International IFIP-TC 6 Networking Conference
CY MAY 14-18, 2007
CL Atlanta, GA
SP Int Federat Informat Proc
AB We propose ESREQM (Efficient Sending Rate Estimation Queue Management), a novel active queue management scheme that achieves almost perfect max-min fairness among flows with minimum (constant) per-flow state and a constant number of CPU operations to handle an incoming packet using a single queue with very low buffer requirements. ESREQM estimates sending rates of flows through a history discounting process that allows it to guarantee max-min fairness by automatically adapting parameters. It can also be used to punish non-responsive flows. The per-flow state is limited to a single value per flow, which allows the flow memory to be in SRAM, thereby making packet processing scalable with link speeds. ESREQM results in good link utilization with low buffer size requirements because it provably desynchronizes TCP flows as a by-product. We show our results through a mixture of analysis and simulation. Our scheme does not make assumptions on what transport protocols are used.
C1 [Ramaswamy, Venkatesh; Cuellar, Leticia; Eidenbenz, Stephan; Hengartner, Nicolas] Los Alamos Natl Lab, CCS 3, Los Alamos, NM 87544 USA.
   [Ambuehl, Christoph] Univ Liverpool, Liverpool, Merseyside, England.
   [Weber, Birgitta] Unilever R&D, Port Sunlight, United Kingdom.
RP Ramaswamy, V (reprint author), Los Alamos Natl Lab, CCS 3, Los Alamos, NM 87544 USA.
EM vramaswav@lanl.gov; leticia@lanl.gov; eidenben@lanl.gov; nickh@lanl.gov;
   christoph@csc.liv.ac.uk; birgitta.weber@unilever.com
NR 10
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-30540-72605-0
J9 LECT NOTES COMPUT SC
PY 2007
VL 4479
BP 855
EP +
PG 2
WC Computer Science, Theory & Methods; Telecommunications
SC Computer Science; Telecommunications
GA BGF66
UT WOS:000246476200073
ER

PT S
AU Wood, SA
AF Wood, Stephen A.
BE Zeller, GP
   Morfin, JG
   Cavanna, F
TI Probing short-range correlations in nuclei with neutrinos, protons, and
   electrons
SO NEUTRINO-NUCLEUS INTERACTIONS IN THE FEW-GEV REGION
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 5th International Workshop on Neutrino-Nucleus Interactions in the
   Few-GeV Region
CY MAY 30-JUN 03, 2007
CL Batavia, IL
SP Fermi Natl Accelerator Lab, Fremi Res Alliance
DE short range correlations
AB Experimental signatures for short-range correlations using electron, proton and neutrino probes are discussed. The measurement of C-12(e,e' pp) and C-12(e, e' pn) indicates that correlations of np pairs dominate that of pp pairs.
C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
RP Wood, SA (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
NR 16
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0484-7
J9 AIP CONF PROC
PY 2007
VL 967
BP 102
EP 105
PG 4
WC Physics, Nuclear
SC Physics
GA BHE84
UT WOS:000252575900018
ER

PT S
AU Melnitchouk, W
AF Melnitchouk, W.
BE Zeller, GP
   Morfin, JG
   Cavanna, F
TI Structure functions at low Q(2): Target mass corrections
SO NEUTRINO-NUCLEUS INTERACTIONS IN THE FEW-GEV REGION
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 5th International Workshop on Neutrino-Nucleus Interactions in the
   Few-GeV Region
CY MAY 30-JUN 03, 2007
CL Batavia, IL
SP Fermi Natl Accelerator Lab, Fremi Res Alliance
DE target mass corrections; large Bjorken-x
ID QUARK-HADRON DUALITY; SCATTERING
AB We discuss recent developments in the study of structure functions at low Q(2), focusing in particular on the issue of target mass corrections (TMC) to nucleon structure functions. We summarize the standard TMC implementation, and contrast this with a new formulation which has the correct kinematic threshold behavior at finite Q(2) in the x -> 1 limit.
C1 Jefferson Lab, Newport News, VA 23606 USA.
RP Melnitchouk, W (reprint author), Jefferson Lab, 12000 Jefferson Ave, Newport News, VA 23606 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0484-7
J9 AIP CONF PROC
PY 2007
VL 967
BP 225
EP 231
PG 7
WC Physics, Nuclear
SC Physics
GA BHE84
UT WOS:000252575900041
ER

PT S
AU Lee, TSH
AF Lee, T. -S. H.
BE Zeller, GP
   Morfin, JG
   Cavanna, F
TI Dynamical resonance production model
SO NEUTRINO-NUCLEUS INTERACTIONS IN THE FEW-GEV REGION
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 5th International Workshop on Neutrino-Nucleus Interactions in the
   Few-GeV Region
CY MAY 30-JUN 03, 2007
CL Batavia, IL
SP Fermi Natl Accelerator Lab, Fremi Res Alliance
DE resonance production
ID REGION
AB Results from a dynamical model of nucleon resonance production in the electroweak reactions are reviewed.
C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Lee, TSH (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
NR 16
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0484-7
J9 AIP CONF PROC
PY 2007
VL 967
BP 238
EP 242
PG 5
WC Physics, Nuclear
SC Physics
GA BHE84
UT WOS:000252575900043
ER

PT S
AU Lalakulich, O
   Melnitchouk, W
   Paschos, EA
   Praet, C
   Jachowicz, N
   Ryckebusch, J
AF Lalakulich, O.
   Melnitchouk, W.
   Paschos, E. A.
   Praet, C.
   Jachowicz, N.
   Ryckebusch, J.
BE Zeller, GP
   Morfin, JG
   Cavanna, F
TI Duality in neutrino reactions
SO NEUTRINO-NUCLEUS INTERACTIONS IN THE FEW-GEV REGION
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 5th International Workshop on Neutrino-Nucleus Interactions in the
   Few-GeV Region
CY MAY 30-JUN 03, 2007
CL Batavia, IL
SP Fermi Natl Accelerator Lab, Fremi Res Alliance
DE quark-hadron duality; two-component duality; structure functions; local
   duality; global duality; resonance production
ID QUARK-HADRON DUALITY
AB On the basis of the phenomenological model for baryon resonance production in lepton-nucleon and lepton-nucleus scattering we investigate to what extent quark-hadron duality is applicable to the neutrino structure functions and how it compares with duality in electron scattering.
C1 [Lalakulich, O.; Praet, C.; Jachowicz, N.; Ryckebusch, J.] Univ Ghent, Dept Subatom & Radiat Phys, B-9000 Ghent, Belgium.
   [Melnitchouk, W.] Jefferson Lab, Newport News, VA 23606 USA.
   [Paschos, E. A.] Univ Dortmund, Inst Phys, Dortmund, Germany.
RP Lalakulich, O (reprint author), Univ Ghent, Dept Subatom & Radiat Phys, B-9000 Ghent, Belgium.
EM wmelnitc@jlab.org; paschos@physik.uni-dortmund.de;
   christophe.praet@ugent.be; natalie.jachowicz@ugent.be
OI Ryckebusch, Jan/0000-0001-7750-1522
NR 10
TC 2
Z9 2
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0484-7
J9 AIP CONF PROC
PY 2007
VL 967
BP 243
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHE84
UT WOS:000252575900044
ER

PT S
AU Owens, JF
   Huston, J
   Keppel, CE
   Kuhlmann, S
   Morfin, JG
   Olness, F
   Pumplin, J
   Stump, D
AF Owens, J. F.
   Huston, J.
   Keppel, C. E.
   Kuhlmann, S.
   Morfin, J. G.
   Olness, F.
   Pumplin, J.
   Stump, D.
BE Zeller, GP
   Morfin, JG
   Cavanna, F
TI Nuclear corrections and parton distribution functions - Lessons learned
   from global fitting
SO NEUTRINO-NUCLEUS INTERACTIONS IN THE FEW-GEV REGION
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 5th International Workshop on Neutrino-Nucleus Interactions in the
   Few-GeV Region
CY MAY 30-JUN 03, 2007
CL Batavia, IL
SP Fermi Natl Accelerator Lab, Fremi Res Alliance
DE deep inelastic scattering; neutrino; nuclear corrections
ID SCATTERING
AB The effects of adding new data sets for neutrino and antineutrino deep inelastic scattering and dimuon production in pp and pd scattering to global fits for parton distribution functions are presented. Particular emphasis is placed on the effects at large x. The role of nuclear corrections in describing the neutrino and antineutrino data is also discussed.
C1 [Owens, J. F.] Florida State Univ, Tallahassee, FL 32306 USA.
   [Stump, D.] Michigan State Univ, E Lansing, MI 48824 USA.
   [Keppel, C. E.] Hampton Univ, Hampton, VA 23668 USA.
   [Keppel, C. E.] Thomas Jefferson Natl Accelerator Lab, Newport News, VA 23606 USA.
   [Kuhlmann, S.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
   [Morfin, J. G.] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA.
   [Olness, F.] So Methodist Univ, Dallas, TX 75275 USA.
RP Owens, JF (reprint author), Florida State Univ, Tallahassee, FL 32306 USA.
EM keppel@jlab.org; morfin@fnal.gov
NR 10
TC 2
Z9 2
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0484-7
J9 AIP CONF PROC
PY 2007
VL 967
BP 259
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHE84
UT WOS:000252575900046
ER

PT S
AU Mason, D
AF Mason, D.
BE Zeller, GP
   Morfin, JG
   Cavanna, F
TI The strange-antistrange asymmetry, the NuTeV measurement & a peek at
   future prospects...
SO NEUTRINO-NUCLEUS INTERACTIONS IN THE FEW-GEV REGION
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 5th International Workshop on Neutrino-Nucleus Interactions in the
   Few-GeV Region
CY MAY 30-JUN 03, 2007
CL Batavia, IL
SP Fermi Natl Accelerator Lab, Fremi Res Alliance
DE strange asymmetry; neutrino charm production; NuTeV; experimental
   results
ID QUARK-ANTIQUARK ASYMMETRY; NUCLEON; SEA
AB The strange asymmetry measurement from NuTeV is discussed, followed by a brief look at measurement prospects from other current and future neutrino DIS experiments. The NuTeV measurement of the difference between the strange and antistrange quark distributions from dimuon events utilizes the first complete NLO QCD description of the process. Dimuon events, resulting from the semi-muonic decay of charmed particles produced in charged current neutrino interactions, allow direct study of the strange quark content of the nucleon. NuTeV's sign selected beam produced uniquely pure samples of neutrino and antineutrino initiated dimuon events, allowing independent measurement of the strange and antistrange quark distributions.
C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Mason, D (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
EM dmason@fnal.gov
NR 27
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0484-7
J9 AIP CONF PROC
PY 2007
VL 967
BP 264
EP 268
PG 5
WC Physics, Nuclear
SC Physics
GA BHE84
UT WOS:000252575900047
ER

PT S
AU Boehnlein, D
AF Boehnlein, David
CA MINERvA Collaboration
BE Zeller, GP
   Morfin, JG
   Cavanna, F
TI Physics topics in MINERvA
SO NEUTRINO-NUCLEUS INTERACTIONS IN THE FEW-GEV REGION
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 5th International Workshop on Neutrino-Nucleus Interactions in the
   Few-GeV Region
CY MAY 30-JUN 03, 2007
CL Batavia, IL
SP Fermi Natl Accelerator Lab, Fremi Res Alliance
DE neutrino interactions
AB The MINERvA experiment now under construction at Fermilab, will combine a fine-grained, fully active neutrino detector with the versatile and highly intense NuMI neutrino beam. This combination will allow high-rate studies of neutrino-nucleus interactions with good resolution of final states. A survey of potential physics studies is presented.
C1 [Boehnlein, David] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Boehnlein, D (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA.
NR 10
TC 4
Z9 4
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0484-7
J9 AIP CONF PROC
PY 2007
VL 967
BP 304
EP 306
PG 3
WC Physics, Nuclear
SC Physics
GA BHE84
UT WOS:000252575900056
ER

PT S
AU Shu, D
   Lee, PL
   Preissner, C
   Ramanathan, M
   Beno, M
   Von Dreele, RB
   Wang, J
   Ranay, R
   Ribaud, L
   Kurtz, C
   Jiao, X
   Kline, D
   Jemian, P
   Toby, BH
AF Shu, D.
   Lee, P. L.
   Preissner, C.
   Ramanathan, M.
   Beno, M.
   Von Dreele, R. B.
   Wang, J.
   Ranay, R.
   Ribaud, L.
   Kurtz, C.
   Jiao, X.
   Kline, D.
   Jemian, P.
   Toby, B. H.
BE Hatheway, AE
TI Mechanical design of a high-resolution x-ray powder diffractometer at
   the advanced photon source - art. no. 66650N
SO NEW DEVELOPMENTS IN OPTOMECHANICS
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on New Developments in Optomechanics
CY AUG 28-30, 2007
CL San Diego, CA
SP SPIE
DE x-ray diffractometer; precision motion control; x-ray analyzer
AB A novel high-resolution x-ray powder diffractometer has been designed and commissioned at the bending magnet beamline 11-BM at the Advanced Photon Source (APS), Argonne National Laboratory (ANL). This state-of-the-art instrument is designed to meet challenging mechanical and optical specifications for producing high-quality powder diffraction data with high throughput. The 2600 mm (H) X 2100 mm (L) X 1700 mm (W) diffractometer consists of five subassemblies:
   a customized two-circle goniometer with a 3-D adjustable supporting base;
   a twelve-channel high-resolution crystal analyzer system with an array of precision x-ray slits;
   a manipulator system for a twelve scintillator x-ray detectors;
   a 4-D sample manipulator with cryo-cooling capability; and
   a robot-based sample exchange automation system.
   The mechanical design of the diffractometer as well as the test results of its positioning performance are presented in this paper.
C1 [Shu, D.; Lee, P. L.; Preissner, C.; Ramanathan, M.; Beno, M.; Von Dreele, R. B.; Wang, J.; Ranay, R.; Ribaud, L.; Kurtz, C.; Jiao, X.; Kline, D.; Jemian, P.; Toby, B. H.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Shu, D (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Toby, Brian/F-3176-2013; Kurtz, Chalres/G-1037-2011
OI Toby, Brian/0000-0001-8793-8285; Kurtz, Chalres/0000-0003-2606-0864
NR 4
TC 0
Z9 0
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6813-0
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6665
BP N6650
EP N6650
DI 10.1117/12.733110
PG 8
WC Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing;
   Optics
SC Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing;
   Optics
GA BHI82
UT WOS:000253450700020
ER

PT S
AU Shu, D
   Narayanan, S
   Sandy, A
   Sprung, M
   Preissner, C
   Sullivan, J
AF Shu, D.
   Narayanan, S.
   Sandy, A.
   Sprung, M.
   Preissner, C.
   Sullivan, J.
BE Hatheway, AE
TI Precision mechanical design of an UHV-compatible artificial channel-cut
   X-ray monochromator - art. no. 66650O
SO NEW DEVELOPMENTS IN OPTOMECHANICS
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on New Developments in Optomechanics
CY AUG 28-30, 2007
CL San Diego, CA
SP SPIE
DE x-ray monochromator; precision motion control; ultra-high-vacuum
AB A novel ultra-high-vacuum (UHV)-compatible x-ray monochromator has been designed and commissioned at the undulator beamline 8-ID-I at the Advanced Photon Source (APS) for x-ray photon correlation spectroscopy applications. To meet the challenging stability and x-ray optical requirements, the monochromator integrates two new precision angular positioning mechanisms into its crystal optics motion control system:
   An overconstrained weak-link mechanism that enables the positioning of an assembly of two crystals to achieve the same performance as a single channel-cut crystal, the so called "artificial channel-cut crystal."
   A ceramic motor driven in-vacuum sine-bar mechanism for the double crystal combined pitch motion.
   The mechanical design of the monochromator, as well as the test results of its positioning performance are presented in this paper.
C1 [Shu, D.; Narayanan, S.; Sandy, A.; Sprung, M.; Preissner, C.; Sullivan, J.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Shu, D (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 8
TC 1
Z9 1
U1 0
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6813-0
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6665
BP O6650
EP O6650
DI 10.1117/12.733101
PG 8
WC Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing;
   Optics
SC Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing;
   Optics
GA BHI82
UT WOS:000253450700021
ER

PT S
AU Preissner, C
   Shu, D
   Royston, TJ
AF Preissner, Curt
   Shu, Deming
   Royston, Thomas J.
BE Hatheway, AE
TI Experimental investigation and model development for a harmonic drive
   transmission - art. no. 66650P
SO NEW DEVELOPMENTS IN OPTOMECHANICS
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on New Developments in Optomechanics
CY AUG 28-30, 2007
CL San Diego, CA
SP SPIE
DE harmonic drive; hysteresis; stiffness; identification; robot; model
ID ROBOT; HYSTERESIS
AB Harmonic drive transmissions (HDTs) are compact, low-backlash, high-ratio, high-resolution rotary motion transmissions. One application to benefit from these attributes is the revolute joint robot. Engineers at the Advanced Photon Source (APS) are investigating the use of this type of robot for the positioning of an x-ray detector; understanding the properties of the robot components is crucial to modeling positioner behavior. The robot bearing elements had been investigated previously, leaving the transmission as the missing component. While the benefits of HDTs are well known, the disadvantages, including fluctuating dissipation characteristics and nonlinear stiffness, are not understood as well. These characteristics can contribute uncontrolled dynamics to the overall robot performance. A dynamometer has been constructed at the APS to experimentally measure the HDT's response. Empirical torque and position data were recorded for multiple transmission load cases and input conditions. In turn, a computer model of the dynamometer HDT system was constructed to approximate the observed response.
C1 [Preissner, Curt; Shu, Deming] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Preissner, C (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 14
TC 1
Z9 1
U1 0
U2 4
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6813-0
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6665
BP P6650
EP P6650
DI 10.1117/12.734409
PG 13
WC Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing;
   Optics
SC Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing;
   Optics
GA BHI82
UT WOS:000253450700022
ER

PT S
AU Xu, S
   Fischetti, RF
AF Xu, S.
   Fischetti, R. F.
BE Hatheway, AE
TI Design and performance of a compact collimator on GM/CA-CAT at the
   advanced photon source - art. no. 66650X
SO NEW DEVELOPMENTS IN OPTOMECHANICS
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on New Developments in Optomechanics
CY AUG 28-30, 2007
CL San Diego, CA
SP SPIE
DE mini-collimator; kinematic mount; crystallography
AB A new macromolecular crystallographic facility developed by The General Medicine and Cancer Institutes Collaborative Access Team (GM/CA-CAT) at the Advanced Photon Source (APS) is a part of the Biosciences Division (BIO), Argonne National Laboratory (ANL). The facility consists of three beamlines: two lines based on the first "hard" dual canted undulators and one bending magnet beamline [1]. Several compact collimator systems have been developed for the purpose of background reduction in macromolecular crystallography experiments. The apparatus consists of a tube collimator, pinhole and kinematics mount. This paper will present a series of compact collimator designs and crystallographic applications based on experimental requirements [2]. We also describe the magnet-based kinematic mounting structures [3] developed as a collimator holder.
C1 [Xu, S.; Fischetti, R. F.] Argonne Natl Lab, GM CA CAT, Biosci Div, Argonne, IL 60439 USA.
RP Xu, S (reprint author), Argonne Natl Lab, GM CA CAT, Biosci Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6813-0
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6665
BP X6650
EP X6650
DI 10.1117/12.733173
PG 8
WC Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing;
   Optics
SC Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing;
   Optics
GA BHI82
UT WOS:000253450700029
ER

PT S
AU Pieper, SC
AF Pieper, Steven C.
BE Sakai, H
   Sekiguchi, K
   Gibson, BF
TI The Illinois extension to the Fujita-Miyazawa three-nucleon force
SO NEW FACET OF THREE NUCLEON FORCE - 50 YEARS OF FUJITA MIYAZAWA THREE
   NUCLEON FORCE (FM 50)
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Symposium on New Facet of Three Nucleon Force - 50 Years
   of Fujita-Miyazawa Three Nucleon Force (FM 50)
CY OCT 29-31, 2007
CL Univ Tokyo, Koshiba Hall, Tokyo, JAPAN
HO Univ Tokyo, Koshiba Hall
DE nuclear potentials
ID MONTE-CARLO CALCULATIONS; NUCLEI; 3-BODY
AB Ab-initio calculations of light nuclei require three-nucleon potentials in addition to realistic two-nucleon forces to obtain the empirical binding energies. The current status of the Illinois three-nucleon potentials used with Argonne v(18) is presented.
C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Pieper, SC (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
EM pieper@phy.anl.gov
NR 24
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0531-8
J9 AIP CONF PROC
PY 2007
VL 1011
BP 143
EP 152
PG 10
WC Physics, Applied; Physics, Nuclear
SC Physics
GA BHT15
UT WOS:000256059100018
ER

PT S
AU Quaglioni, S
   Navratil, P
AF Quaglioni, Sofia
   Navratil, Petr
BE Sakai, H
   Sekiguchi, K
   Gibson, BF
TI Application of chiral two- and three-nucleon interactions to He-4
   photo-disintegration
SO NEW FACET OF THREE NUCLEON FORCE - 50 YEARS OF FUJITA MIYAZAWA THREE
   NUCLEON FORCE (FM 50)
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Symposium on New Facet of Three Nucleon Force - 50 Years
   of Fujita-Miyazawa Three Nucleon Force (FM 50)
CY OCT 29-31, 2007
CL Univ Tokyo, Koshiba Hall, Tokyo, JAPAN
HO Univ Tokyo, Koshiba Hall
ID LORENTZ INTEGRAL TRANSFORM; PERTURBATION-THEORY; RESPONSE FUNCTIONS;
   NUCLEAR-FORCES; LAGRANGIANS
AB We report on an ab initio calculation of the He-4 total photo-absorption cross section using two- and three-nucleon interactions based upon chiral effective field theory. ne microscopic treatment of the continuum problem is achieved using the Lorentz integral transform method, applied within the no-core shell model approach.
C1 [Quaglioni, Sofia; Navratil, Petr] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Quaglioni, S (reprint author), Lawrence Livermore Natl Lab, L-414,POB 808, Livermore, CA 94551 USA.
EM quaglioni1@lln1.gov
NR 24
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0531-8
J9 AIP CONF PROC
PY 2007
VL 1011
BP 177
EP 182
PG 6
WC Physics, Applied; Physics, Nuclear
SC Physics
GA BHT15
UT WOS:000256059100023
ER

PT S
AU Gibson, BF
AF Gibson, B. F.
BE Sakai, H
   Sekiguchi, K
   Gibson, BF
TI Concluding remarks
SO NEW FACET OF THREE NUCLEON FORCE - 50 YEARS OF FUJITA MIYAZAWA THREE
   NUCLEON FORCE (FM 50)
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Symposium on New Facet of Three Nucleon Force - 50 Years
   of Fujita-Miyazawa Three Nucleon Force (FM 50)
CY OCT 29-31, 2007
CL Univ Tokyo, Koshiba Hall, Tokyo, JAPAN
HO Univ Tokyo, Koshiba Hall
DE three-body forces; nuclear; hypernuclear
ID INELASTIC ELECTRON SCATTERING; LOW MOMENTUM TRANSFER; ELASTIC
   SCATTERING; POTENTIAL MODELS; FORCES; HE-3; NUCLEI; SYSTEM; H-3
AB The observations collected here represent the author's personal perspective regarding the physics discussed and the ideas expressed by the participants in this International Symposium on New Facets of the Three Nucleon Force. These remarks are not intended to be a summary talk. Moreover, physics rather than the physicists who spoke are emphasized. The ideas, which were skillfully brought to life in the University of Tokyo's Koshiba Hall through erudite and colorful powerpoint presentations, will hopefully outlive the rapporteurs who gave generously of their time and talent to make it happen.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Gibson, BF (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM bfgibson@tmail.lanl.gov
NR 34
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0531-8
J9 AIP CONF PROC
PY 2007
VL 1011
BP 297
EP 306
PG 10
WC Physics, Applied; Physics, Nuclear
SC Physics
GA BHT15
UT WOS:000256059100040
ER

PT S
AU Lee, JW
   Meller, A
AF Lee, James Weifu
   Meller, Amit
BE Mitchelson, KR
TI Rapid DNA Sequencing by Direct Nanoscale Reading of Nucleotide Bases on
   Individual DNA chains
SO NEW HIGH THROUGHPUT TECHNOLOGIES FOR DNA SEQUENCING AND GENOMICS
SE Perspectives in Bioanalysis
LA English
DT Article; Book Chapter
ID POLYNUCLEOTIDE MOLECULES; HAIRPIN MOLECULES; MEMBRANE CHANNEL; NANOPORE;
   DISCRIMINATION; PROBES; FABRICATION; HYDROGEN; SURFACE; ACID
AB We present and discuss two concepts for rapid DNA sequencing by direct nanoscale reading of nucleotide bases on individual DNA molecules. Although these two concepts are based on substantially different principles, they both rely on the fabrication of nanoscale devices using state of the art technologies. The first method, which has been recently invented at Oak Ridge National Laboratory (ORNL), is based on a systematic nanoelectrode-gated tip-to-tip electron-tunneling molecular-detection concept. According to this concept, it should be possible to obtain genetic sequence information by probing through a DNA molecule base by base at a nanometer scale, as if looking at a strip of movie film. The nanoscale reading of DNA sequences is envisioned to take place at a nanogap (gate) defined by a pair of nanoelectrode tips as a DNA molecule moves through the gate base by base. The rationale is that sample molecules, such as the four different nucleotide bases, each with a distinct chemical composition and structure, should produce a specific perturbation effect on the tunneling electron beam across the two nanoelectrode tips. A sample molecular structure (base) could thus be detected when it enters the gate. This approach could lead to a single-molecule DNA sequencing technology that does not require the PCR amplification process and could, at least, be thousands of times faster than the current technology (Sanger's "dideoxy" protocol-based capillary electrophoresis systems). Theoretically, this new approach has the potential to perform DNA sequencing at a maximal rate of about 1,000,000 bases (similar to 1 Mb) per second per detection gate. This method can be paralleled using parallel arrays of multiple nanoelectrode-detection gates, thus magnifying the readout throughput by additional orders of magnitudes, achieving estimated maximal rates of possibly hundred millions bases (100 Mb) per second per device. The second method, developed at Harvard in collaboration with LingVitae AS, is based on the conversion of the natural DNA to another form of DNA in which each nucleotide is substituted with a group of 16 nucleotides (each base type is substituted with a unique sequence of 16 bases). Then fluorescently tagged oligonucleotides 16-mers, matching that of the converted DNA, are hybridized to the DNA and the molecule is electrophoretically fed through a nanoscale pore fabricated in thin solid-state film. The pore is used to sequentially remove the hybridized oligonucleotides, one by one, while the flashes of light in different colors arising from the attached fluorophores are detected. Moreover, according to the invention made by the Harvard group, the fluorophores attached to the 16-mer oligonucleotides are designed to be quenched until they reach the face of the nanopore, thus eliminating the undesired background fluorescence. This method is highly suitable for massive paralleled readout using high-density arrays of nanopores, which are simultaneously probed using a single imaging device. The readout throughput thus can be magnified by several orders of magnitudes, achieving estimated readout rates of similar to 1-10 Mb/s.
C1 [Lee, James Weifu] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   [Meller, Amit] Boston Univ, Dept Phys & Biomed Engn, Boston, MA 02215 USA.
RP Lee, JW (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
NR 38
TC 13
Z9 13
U1 1
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1871-0069
BN 978-0-08-047128-0
J9 PERSP BIOANAL
PY 2007
VL 2
BP 245
EP 263
DI 10.1016/S1871-0069(06)02008-8
PG 19
WC Biochemistry & Molecular Biology; Genetics & Heredity
SC Biochemistry & Molecular Biology; Genetics & Heredity
GA BCO02
UT WOS:000310811700009
ER

PT J
AU Atencio, R
   Briceno, A
   Silva, P
   Rodriguez, JA
   Hanson, JC
AF Atencio, Reinaldo
   Briceno, Alexander
   Silva, Pedro
   Rodriguez, Jose A.
   Hanson, Jonathan C.
TI Sequential transformations in assemblies based on octamolybdate clusters
   and 1,2-bis(4-pyridyl)ethane
SO NEW JOURNAL OF CHEMISTRY
LA English
DT Article
ID MICROPOROUS GALLIUM FLUOROPHOSPHATE; SOLID-STATE REACTION; HYDROTHERMAL
   SYNTHESIS; BETA-OCTAMOLYBDATE; CRYSTAL-STRUCTURES; ROOM-TEMPERATURE;
   STRUCTURAL CHARACTERIZATION; GAMMA-OCTAMOLYBDATE; METAL PHOSPHATES;
   BUILDING-BLOCKS
AB The new hybrid inorganic-organic solids [Mo8O26][H(2)bpe](2) (1), {[Mo8O26(mu-bpe)][H(2)bpe](2)}(n) (2), [Mo8O26(Hbpe)(2)][H(2)bpe] (3), and {[Mo8O26][H(2)bpe](2)}(n) (4) were synthesized under hydrothermal conditions. The crystal structure of 1 contains the discrete octamolybdate beta-isomer, whereas in 3 the inorganic building unit is a functionalized octamolybdate of general formula [Mo8O26X2]((2n-4)). A similar building unit is found in 2 and 4, but forming part of polymeric 1D-arrays. In 2 the polymer is constructed from [Mo8O26(mu-bpe)](4-), and the functionalization of the anionic cluster in 4 occurs through Mo-O-Mo bonds. The sequential hydrothermal 2/3 -> 1 and 1 -> 4 transformations were observed at 145 and 180 degrees C, respectively. However, thermal studies of 1 and 4 revealed that both materials do not suffer any phase transitions below 340 degrees C for 1 or <350 degrees C for 4, indicating that such transformations are possible only under the hydrothermal conditions. An XRPD study as a function of the temperature of 1 also demonstrated the negligible structural changes before 330 degrees C.
C1 Inst Venezolano Invest Cient, Caracas 1020A, Venezuela.
   Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RP Atencio, R (reprint author), Inst Venezolano Invest Cient, Apartado 21827, Caracas 1020A, Venezuela.
EM ratencio@ivic.ve
RI Hanson, jonathan/E-3517-2010; Silva, Pedro /A-3167-2015
OI Silva, Pedro /0000-0002-6409-8735
NR 65
TC 35
Z9 36
U1 0
U2 2
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
   ENGLAND
SN 1144-0546
J9 NEW J CHEM
JI New J. Chem.
PY 2007
VL 31
IS 1
BP 33
EP 38
DI 10.1039/b603996k
PG 6
WC Chemistry, Multidisciplinary
SC Chemistry
GA 123LY
UT WOS:000243298600004
ER

PT J
AU Thallapally, PK
   Kirby, KA
   Atwood, JL
AF Thallapally, Praveen K.
   Kirby, Karen A.
   Atwood, Jerry L.
TI Comparison of porous and nonporous materials for methane storage
SO NEW JOURNAL OF CHEMISTRY
LA English
DT Article
ID METAL-ORGANIC FRAMEWORKS; HYDROGEN; CRYSTAL; POLYMORPHISM; SORPTION;
   DESIGN; PURE
AB Sublimed, low-density p-tert-butylcalix[ 4] arene absorbs methane more readily at room temperature and 1 atm pressure than do either single wall carbon nanotubes (SWNT) or a comparative porous metal - organic framework (MOF-1).
C1 Pacific NW Natl Lab, Richland, WA 99352 USA.
   Univ Missouri, Dept Chem, Columbia, MO 65211 USA.
RP Thallapally, PK (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd, Richland, WA 99352 USA.
EM Praveen.Thallapally@pnl.gov; atwoodj@missouri.edu
RI thallapally, praveen/I-5026-2014; 
OI thallapally, praveen/0000-0001-7814-4467; Kirby, Karen
   A./0000-0003-2468-4796
NR 29
TC 32
Z9 32
U1 2
U2 16
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
   ENGLAND
SN 1144-0546
J9 NEW J CHEM
JI New J. Chem.
PY 2007
VL 31
IS 5
BP 628
EP 630
DI 10.1039/b610321a
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 166RH
UT WOS:000246396600004
ER

PT J
AU Reyheller, C
   Hay, BP
   Kubik, S
AF Reyheller, Carsten
   Hay, Benjamin P.
   Kubik, Stefan
TI Influence of linker structure on the anion binding affinity of
   biscyclopeptides
SO NEW JOURNAL OF CHEMISTRY
LA English
DT Article
ID ENTHALPY-ENTROPY COMPENSATION; STRUCTURE-BASED DESIGN; 6-AMINOPICOLINIC
   ACID SUBUNITS; COMPUTER-GUIDED DESIGN; AQUEOUS-SOLUTION; HOST-GUEST;
   MOLECULAR RECOGNITION; RECEPTOR; COMPLEXES; OPTIMIZATION
AB A systematic analysis is presented on the influence of the linking unit between two cyclopeptide rings on the affinity of such biscyclopeptide-based anion receptors in aqueous solvent mixtures. Although the differences in the affinity and selectivity of these receptors towards a given anion are not very pronounced, there are profound differences in the thermodynamics of anion complexation. Enthalpic and entropic contributions both ( 1) play a role in determining the binding affinity and ( 2) show significant variation as the linking structure is changed. A decrease in conformational rigidity of the linker improves the entropic advantage for complex formation, but not necessarily the overall complex stability. This effect may be due, in part, to the fact that structural constraints within more rigid linkers might prevent efficient interactions between the host and guest. The optimal linker, which exhibits both favourable enthalpic and entropic contributions, was identified using de novo structure-based design methods as implemented in the HostDesigner software.
C1 Tech Univ Kaiserslautern, Fachbereich Chem Organ Chem, D-67663 Kaiserslautern, Germany.
   Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Kubik, S (reprint author), Tech Univ Kaiserslautern, Fachbereich Chem Organ Chem, Erwin Schrodinger Str, D-67663 Kaiserslautern, Germany.
EM kubik@chemie.uni-kl.de
RI Kubik, Stefan/B-3689-2016
OI Kubik, Stefan/0000-0003-0526-7014
NR 47
TC 23
Z9 23
U1 1
U2 14
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
   ENGLAND
SN 1144-0546
J9 NEW J CHEM
JI New J. Chem.
PY 2007
VL 31
IS 12
BP 2095
EP 2102
DI 10.1039/b706932d
PG 8
WC Chemistry, Multidisciplinary
SC Chemistry
GA 235YG
UT WOS:000251269600013
ER

PT J
AU van Diepen, LTA
   Lilleskov, EA
   Pregitzer, KS
   Miller, RM
AF van Diepen, Linda T. A.
   Lilleskov, Erik A.
   Pregitzer, Kurt S.
   Miller, R. Michael
TI Decline of arbuscular mycorrhizal fungi in northern hardwood forests
   exposed to chronic nitrogen additions
SO NEW PHYTOLOGIST
LA English
DT Article
DE Acer saccharum (sugar maple); arbuscular mycorrhizal fungi (AMF);
   neutral lipid fatty acid (NLFA); nitrogen deposition; phospholipid fatty
   acid (PLFA); staining
ID MORPHOLOGICAL CHARACTERS; NO3-DEPOSITION; SOIL; GROWTH; ROOTS;
   FERTILIZATION; CONSEQUENCES; PHOSPHORUS
AB Arbuscular mycorrhizal (AM) fungi are important below-ground carbon (C) sinks that can be sensitive to increased nitrogen (N) availability. The abundance of AM fungi (AMF) was estimated in maple (Acer spp.) fine roots following more than a decade of experimental additions of N designed to simulate chronic atmospheric N deposition.
   Abundance of AMF was measured by staining and ocular estimation, as well as by analyzing for the AMF indicator fatty acid 16:1 omega 5c in phospholipid (biomass indicator) and neutral lipid (lipid storage indicator) fractions.
   Arbuscular mycorrhizal fungal biomass, storage structures and lipid storage declined in response to N addition measured by both methods. This pattern was found when AM response was characterized as colonization intensity, on an areal basis and in proportion to maple above-ground biomass. The phospholipid fraction of the fatty acid 16:1 omega 5c was positively correlated with total AMF colonization and the neutral lipid fraction with vesicle colonization.
   Decreased AMF abundance with simulated N deposition suggests reduced C allocation to these fungi or a direct soil N-mediated decline. The fatty acid (phospholipid and neutral lipid fractions) 16:1 omega 5c was found to be a good indicator for AMF active biomass and stored energy, respectively.
C1 Michigan Technol Univ, Sch Forestry & Environm Sci, Ecosyst Sci Ctr, Houghton, MI 49931 USA.
   USDA Forest Serv, No Res Stn, Houghton, MI 49931 USA.
   Argonne Natl Lab, Environm Res Div, Argonne, IL 60439 USA.
RP van Diepen, LTA (reprint author), Michigan Technol Univ, Sch Forestry & Environm Sci, Ecosyst Sci Ctr, Houghton, MI 49931 USA.
EM ltvandie@mtu.edu
NR 31
TC 36
Z9 39
U1 4
U2 59
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0028-646X
J9 NEW PHYTOL
JI New Phytol.
PY 2007
VL 176
IS 1
BP 175
EP 183
DI 10.1111/j.1469-8137.2007.02150.x
PG 9
WC Plant Sciences
SC Plant Sciences
GA 210AW
UT WOS:000249430100016
PM 17803648
ER

PT J
AU Wullschleger, SD
   Leakey, ADB
   St Clair, SB
AF Wullschleger, Stan D.
   Leakey, Andrew D. B.
   St Clair, Samuel B.
TI Functional genomics and ecology - a tale of two scales
SO NEW PHYTOLOGIST
LA English
DT Editorial Material
DE adaptive traits; climate change; ecology; evolution; functional
   genomics; gene expression; microarrays
ID GENE-EXPRESSION; FLOWERING TIME; ECOPHYSIOLOGICAL TRAITS;
   ARABIDOPSIS-THALIANA; ATMOSPHERIC CO2; ARCHITECTURE; EVOLUTION;
   NETWORKS; PATTERNS; DROUGHT
AB Linking physiological ecology, evolutionary biology and functional genomics for understanding biotic responses to a changing environment and Mechanistic underpinnings of ecological processes: scaling from genes to ecosystems
C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
   Univ Illinois, Inst Genom Biol, Dept Plant Biol, Urbana, IL 61801 USA.
   Brigham Young Univ, Provo, UT 84602 USA.
RP Wullschleger, SD (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA.
EM wullschlegsd@ornl.gov
RI Wullschleger, Stan/B-8297-2012; Leakey, Andrew/Q-9889-2016
OI Wullschleger, Stan/0000-0002-9869-0446; Leakey,
   Andrew/0000-0001-6251-024X
NR 22
TC 3
Z9 3
U1 0
U2 4
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0028-646X
J9 NEW PHYTOL
JI New Phytol.
PY 2007
VL 176
IS 4
BP 735
EP 739
DI 10.1111/j.1469-8137.2007.02278.x
PG 5
WC Plant Sciences
SC Plant Sciences
GA 229QR
UT WOS:000250819700003
PM 17997757
ER

PT J
AU Freeman, JL
   Lindblom, SD
   Quinn, CF
   Fakra, S
   Marcus, MA
   Pilon-Smits, EAH
AF Freeman, John L.
   Lindblom, Stormy Dawn
   Quinn, Colin F.
   Fakra, Sirine
   Marcus, Matthew A.
   Pilon-Smits, Elizabeth A. H.
TI Selenium accumulation protects plants from herbivory by Orthoptera via
   toxicity and deterrence
SO NEW PHYTOLOGIST
LA English
DT Article
DE Brassica juncea; deterrence; elemental defense; herbivory protection;
   Orthoptera; selenium (Se) hyperaccumulator; Stanleya pinnata; toxicity
ID INDIAN MUSTARD; CHLAMYDOMONAS-REINHARDTII; ASTRAGALUS-BISULCATUS;
   STANLEYA-PINNATA; PHYTOREMEDIATION; HYPERACCUMULATION; SELENOCYSTEINE;
   BRASSICACEAE; SULFUR; FORM
AB To investigate whether selenium (Se) accumulation in plants provides a chemical defense against generalist insect herbivores, the feeding preference and performance of a mix of orthopteran species were investigated.
   The selenium hyperaccumulator Stanleya pinnata and accumulator Brassica juncea were used in herbivory studies in the laboratory, and S. pinnata was also used in a manipulative field experiment.
   In laboratory studies, both crickets and grasshoppers avoided plants pretreated with selenate while those given no choice died after eating leaves with elevated Se (447 +/- 68 and 230 +/- 68 pg Se g(-1) DW, respectively). B. juncea has previously been shown to accumulate selenate, while S. pinnata hyperaccumulates methylselenocysteine. Thus, these findings demonstrate that both inorganic and organic forms of selenium protect plants from herbivory. Grasshoppers fed S. pinnata contained methylselenocysteine in their midgut and absorbed this form into surrounding tissues. In a manipulative field experiment, methylselenocysteine protected S. pinnata from invertebrate herbivory and increased its long-term survival rate over an entire growth season.
   In native habitats of selenium hyperaccumulators, orthopterans represent a major group of insect herbivores. Protection offered by organic selenium accumulation against these herbivores may have promoted the evolution of selenium hyperaccumulation in plants.
C1 Colorado State Univ, Dept Biol, Program Mol Plant Biol, Ft Collins, CO 80523 USA.
   Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Pilon-Smits, EAH (reprint author), Colorado State Univ, Dept Biol, Program Mol Plant Biol, Ft Collins, CO 80523 USA.
EM epsmits@lamar.colostate.edu
RI Freeman, John/C-4910-2009
NR 50
TC 52
Z9 52
U1 1
U2 18
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0028-646X
J9 NEW PHYTOL
JI New Phytol.
PY 2007
VL 175
IS 3
BP 490
EP 500
DI 10.1111/j.1469-8137.2007.02119.x
PG 11
WC Plant Sciences
SC Plant Sciences
GA 195ZN
UT WOS:000248451100012
PM 17635224
ER

PT J
AU Tappero, R
   Peltier, E
   Grafe, M
   Heidel, K
   Ginder-Vogel, M
   Livi, KJT
   Rivers, ML
   Marcus, MA
   Chaney, RL
   Sparks, DL
AF Tappero, R.
   Peltier, E.
   Graefe, M.
   Heidel, K.
   Ginder-Vogel, M.
   Livi, K. J. T.
   Rivers, M. L.
   Marcus, M. A.
   Chaney, R. L.
   Sparks, D. L.
TI Hyperaccumulator Alyssum murale relies on a different metal storage
   mechanism for cobalt than for nickel
SO NEW PHYTOLOGIST
LA English
DT Article
DE Alyssum murale; cobalt (Co); computed-microtomography (CMT);
   hyperaccumulation; nickel (Ni); synchrotron X-ray microfluorescence
   (SXRF); tolerance
ID THLASPI-CAERULESCENS; CELLULAR COMPARTMENTATION;
   SUBCELLULAR-LOCALIZATION; COMPUTED MICROTOMOGRAPHY; ARABIDOPSIS-HALLERI;
   CONTAMINATED SOILS; ZINC TOLERANCE; FREE HISTIDINE; MICRO-PIXE; PLANTS
AB The nickel (Ni) hyperaccumulator Alyssum murale has been developed as a commercial crop for phytoremediation/phytomining Ni from metal-enriched soils. Here, metal co-tolerance, accumulation and localization were investigated for A. murale exposed to metal co-contaminants.
   A. murale was irrigated with Ni-enriched nutrient solutions containing basal or elevated concentrations of cobalt (Co) or zinc (Zn). Metal localization and elemental associations were investigated in situ with synchrotron X-ray microfluorescence (SXRF) and computed-microtomography (CMT).
   A. murale hyperaccumulated Ni and Co(> 1000 mu g g(-1) dry weight) from mixed-metal systems. Zinc was not hyperaccumulated. Elevated Co or Zn concentrations did not alter Ni accumulation or localization. SXRF images showed uniform Ni distribution in leaves and preferential localization of Co near leaf tips/margins. CMT images revealed that leaf epidermal tissue was enriched with Ni but devoid of Co, that Co was localized in the apoplasm of leaf ground tissue and that Co was sequestered on leaf surfaces near the tips/margins.
   Cobalt-rich mineral precipitate(s) form on leaves of Co-treated A. murale. Specialized biochemical processes linked with Ni (hyper)tolerance in A. murale do not confer (hyper)tolerance to Co. A. murale relies on a different metal storage mechanism for Co (exocellular sequestration) than for Ni (vacuolar sequestration).
C1 Univ Delaware, Newark, DE 19716 USA.
   Stanford Univ, Stanford, CA 94305 USA.
   Johns Hopkins Univ, Baltimore, MD 21218 USA.
   Univ Chicago, Ctr Adv Radiat Sources, Chicago, IL 60637 USA.
   Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   USDA ARS, Beltsville, MD 20705 USA.
RP Tappero, R (reprint author), Univ Delaware, Newark, DE 19716 USA.
EM rtappero@udel.edu
NR 67
TC 74
Z9 76
U1 2
U2 33
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0028-646X
J9 NEW PHYTOL
JI New Phytol.
PY 2007
VL 175
IS 4
BP 641
EP 654
DI 10.1111/j.1469-8137.2007.02134.x
PG 14
WC Plant Sciences
SC Plant Sciences
GA 205FC
UT WOS:000249098400007
PM 17688581
ER

PT J
AU McLaughlin, SB
   Nosal, M
   Wullschleger, SD
   Sun, G
AF McLaughlin, S. B.
   Nosal, M.
   Wullschleger, S. D.
   Sun, G.
TI Interactive effects of ozone and climate on tree growth and water use in
   a southern Appalachian forest in the USA
SO NEW PHYTOLOGIST
LA English
DT Article
DE climate; forests; growth; models; ozone (O-3); water use
ID ABIES L KARST; UNITED-STATES; PONDEROSA PINE; AIR-POLLUTION;
   LOBLOLLY-PINE; AMBIENT OZONE; PICEA-ABIES; STOMATAL RESPONSES;
   TROPOSPHERIC OZONE; NATURAL STANDS
AB A lack of data on responses of mature tree growth and water use to ambient ozone (O-3) concentrations has been a major limitation in efforts to understand and model responses of forests to current and future changes in climate.
   Here, hourly to seasonal patterns of stem growth and sap flow velocity were examined in mature trees from a mixed deciduous forest in eastern Tennessee (USA) to evaluate the effects of variations in ambient O-3 exposure and climate on patterns of stem growth and water use.
   Ambient O-3 caused a periodic slowdown in seasonal growth patterns that was attributable in part to amplification of diurnal patterns of water loss in tree stems. This response was mediated by statistically significant increases in O-3-induced daily sap flow and led to seasonal losses in stem growth of 30-50% for most species in a high-O-3 year.
   Decreased growth and increased water use of mature forest trees under episodically high ambient O-3 concentrations suggest that O-3 will amplify the adverse effects of increasing temperatures on forest growth and forest hydrology.
C1 Univ Tennessee, Dept Ecol & Evolut Biol, Knoxville, TN USA.
   Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
   Univ Calgary, Dept Math & Stat, Calgary, AB T2N 1N4, Canada.
   US Forest Serv, So Global Changre Program, Raleigh, NC USA.
RP McLaughlin, SB (reprint author), Univ Tennessee, Dept Ecol & Evolut Biol, Knoxville, TN USA.
EM lochlainnsbp@earthlink.net
RI Wullschleger, Stan/B-8297-2012
OI Wullschleger, Stan/0000-0002-9869-0446
NR 57
TC 58
Z9 59
U1 2
U2 24
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0028-646X
J9 NEW PHYTOL
JI New Phytol.
PY 2007
VL 174
IS 1
BP 109
EP 124
DI 10.1111/j.1469-8137.2007.02018.x
PG 16
WC Plant Sciences
SC Plant Sciences
GA 140QM
UT WOS:000244520700013
PM 17335502
ER

PT J
AU McLaughlin, SB
   Wullschleger, SD
   Sun, G
   Nosal, M
AF McLaughlin, S. B.
   Wullschleger, S. D.
   Sun, G.
   Nosal, M.
TI Interactive effects of ozone and climate on water use, soil moisture
   content and streamflow in a southern Appalachian forest in the USA
SO NEW PHYTOLOGIST
LA English
DT Article
DE Appalachia; climate; forests; ozone; soils; streamflow; water use
ID ABIES L KARST; PONDEROSA PINE; LOBLOLLY-PINE; AIR-POLLUTION;
   UNITED-STATES; NATURAL STANDS; CARBON-DIOXIDE; AMBIENT OZONE; O-3
   EXPOSURE; GROWTH
AB Documentation of the degree and direction of effects of ozone on transpiration of canopies of mature forest trees is critically needed to model ozone effects on forest water use and growth in a warmer future climate.
   Patterns of sap flow in stems and soil moisture in the rooting zones of mature trees, coupled with late-season streamflow in three forested watersheds in east Tennessee, USA, were analyzed to determine relative influences of ozone and other climatic variables on canopy physiology and streamflow patterns.
   Statistically significant increases in whole-tree canopy conductance, depletion of soil moisture in the rooting zone, and reduced late-season streamflow in forested watersheds were detected in response to increasing ambient ozone levels.
   Short-term changes in canopy water use and empirically modeled streamflow patterns over a 23-yr observation period suggest that current ambient ozone exposures may exacerbate the frequency and level of negative effects of drought on forest growth and stream health.
C1 Univ Tennessee, Dept Ecol & Evolut Biol, Knoxville, TN USA.
   Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
   US Forest Serv, So Global Change Program, Raleigh, NC USA.
   Univ Calgary, Dept Math & Stat, Calgary, AB T2N 1N4, Canada.
RP McLaughlin, SB (reprint author), Univ Tennessee, Dept Ecol & Evolut Biol, Knoxville, TN USA.
EM lochlainnsbp@earthlink.net
RI Wullschleger, Stan/B-8297-2012
OI Wullschleger, Stan/0000-0002-9869-0446
NR 50
TC 47
Z9 49
U1 0
U2 27
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0028-646X
J9 NEW PHYTOL
JI New Phytol.
PY 2007
VL 174
IS 1
BP 125
EP 136
DI 10.1111/j.1469-8137.2007.01970.x
PG 12
WC Plant Sciences
SC Plant Sciences
GA 140QM
UT WOS:000244520700014
PM 17335503
ER

PT J
AU Hyvonen, R
   Agren, GI
   Linder, S
   Persson, T
   Cotrufo, MF
   Ekblad, A
   Freeman, M
   Grelle, A
   Janssens, IA
   Jarvis, PG
   Kellomaki, S
   Lindroth, A
   Loustau, D
   Lundmark, T
   Norby, RJ
   Oren, R
   Pilegaard, K
   Ryan, MG
   Sigurdsson, BD
   Stromgren, M
   van Oijen, M
   Wallin, G
AF Hyvonen, Riitta
   Agren, Goran I.
   Linder, Sune
   Persson, Tryggve
   Cotrufo, M. Francesca
   Ekblad, Alf
   Freeman, Michael
   Grelle, Achim
   Janssens, Ivan A.
   Jarvis, Paul G.
   Kellomaki, Seppo
   Lindroth, Anders
   Loustau, Denis
   Lundmark, Tomas
   Norby, Richard J.
   Oren, Ram
   Pilegaard, Kim
   Ryan, Michael G.
   Sigurdsson, Bjarni D.
   Stromgren, Monika
   van Oijen, Marcel
   Wallin, Goran
TI The likely impact of elevated [CO2], nitrogen deposition, increased
   temperature and management on carbon sequestration in temperate and
   boreal forest ecosystems: a literature review
SO NEW PHYTOLOGIST
LA English
DT Review
DE carbon balance; carbon dioxide (CO2); climate change; fertilization;
   global warming
ID SOIL ORGANIC-MATTER; LEAF-LITTER DECOMPOSITION; YOUNG
   POPULUS-TRICHOCARPA; GROSS PRIMARY PRODUCTION; NET PRIMARY PRODUCTION;
   NORWAY SPRUCE FOREST; FINE-ROOT PRODUCTION; 3 EXPOSURE YEARS; 4 POPLAR
   CLONES; ATMOSPHERIC CO2
AB Temperate and boreal forest ecosystems contain a large part of the carbon stored on land, in the form of both biomass and soil organic matter. Increasing atmospheric [CO2], increasing temperature, elevated nitrogen deposition and intensified management will change this C store. Well documented single-factor responses of net primary production are: higher photosynthetic rate (the main [CO2] response); increasing length of growing season (the main temperature response); and higher leaf-area index (the main N deposition and partly [CO2] response). Soil organic matter will increase with increasing litter input, although priming may decrease the soil C stock initially, but litter quality effects should be minimal (response to [CO2], N deposition, and temperature); will decrease because of increasing temperature; and will increase because of retardation of decomposition with N deposition, although the rate of decomposition of high-quality litter can be increased and that of low-quality litter decreased. Single-factor responses can be misleading because of interactions between factors, in particular those between N and other factors, and indirect effects such as increased N availability from temperature-induced decomposition. In the long term the strength of feedbacks, for example the increasing demand for N from increased growth, will dominate over short-term responses to single factors. However, management has considerable potential for controlling the C store.
C1 Swedish Univ Agr Sci, Dept Ecol & Environm Res, SLU, SE-75007 Uppsala, Sweden.
   So Swedish Forest Res Ctr, SLU, SE-23053 Alnarp, Sweden.
   Univ Naples 2, Dept Environm Sci, I-81100 Caserta, Italy.
   Univ Orebro, Dept Nat Sci, SE-70182 Orebro, Sweden.
   Univ Antwerp VIB, Dept Biol, B-2610 Antwerp, Belgium.
   Univ Joensuu, Fac Forestry, FI-80101 Joensuu, Finland.
   Duireaskin, Aberfeldy PH15 2ED, Perth, Scotland.
   Lund Univ, Dept Phys Geog & Ecosyst Anal, SE-22362 Lund, Sweden.
   INRA, Res Unit EPHYSE, F-33883 Villenave Dornon, France.
   SLU, Unit Field Based Forest Res, SE-92291 Vindeln, Sweden.
   Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
   Duke Univ, Nicholas Sch Environm & Earth Sci, Div Environm Sci & Policy, Durham, NC 27708 USA.
   Riso Natl Lab, Plant Biol & Biogeochem Dept, DK-4000 Roskilde, Denmark.
   USDA, Forest Serv RMRS, Ft Collins, CO 80526 USA.
   Agr Univ Iceland, IS-311 Borgarnes, Iceland.
   SLU, Dept Forest Soils, SE-75007 Uppsala, Sweden.
   CEH Edinburgh, Penicuik EH26 0QB, Midlothian, Scotland.
   Univ Gothenburg, Dept Plant & Environm Sci, SE-40530 Gothenburg, Sweden.
RP Hyvonen, R (reprint author), Swedish Univ Agr Sci, Dept Ecol & Environm Res, SLU, POB 7072, SE-75007 Uppsala, Sweden.
EM Riitta.Hyvonen@eom.slu.se
RI Ryan, Michael/A-9805-2008; Norby, Richard/C-1773-2012; Cotrufo, M.
   Francesca/C-1614-2013; Pilegaard, Kim/I-7137-2013; Lindroth,
   Anders/N-4697-2014; Janssens, Ivan/P-1331-2014
OI Ryan, Michael/0000-0002-2500-6738; Norby, Richard/0000-0002-0238-9828;
   Cotrufo, M. Francesca/0000-0002-6191-8953; Pilegaard,
   Kim/0000-0002-5169-5717; Lindroth, Anders/0000-0002-7669-784X; Janssens,
   Ivan/0000-0002-5705-1787
NR 197
TC 328
Z9 354
U1 36
U2 376
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0028-646X
J9 NEW PHYTOL
JI New Phytol.
PY 2007
VL 173
IS 3
BP 463
EP 480
DI 10.1111/j.1469-8137.2007.01967.x
PG 18
WC Plant Sciences
SC Plant Sciences
GA 125YH
UT WOS:000243478900005
PM 17244042
ER

PT B
AU Yamada, M
   Ren, Y
   Ji, HT
AF Yamada, Masaaki
   Ren, Yang
   Ji, Hantao
BE Shibata, K
   Nagata, S
   Sakurai, T
TI Recent progress in study of magnetic reconnection in a laboratory plasma
   and possible application to space astrophysical plasmas
SO NEW SOLAR PHYSICS WITH SOLAR-B MISSION
SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES
LA English
DT Proceedings Paper
CT 6th Solar-B Science Meeting 2005
CY NOV 08-11, 2005
CL Kyoto Int Comm House, Kyoto, JAPAN
HO Kyoto Int Comm House
ID COLLISIONLESS RECONNECTION; PARTICLE SIMULATION; CURRENT SHEET; GUIDE
   FIELD; SOLAR-FLARE; MAGNETOPAUSE; RESISTIVITY; REGIONS; FLUID
AB This paper summarizes the recent progress in study of magnetic reconnection in a laboratory plasma focusing on the two-fluid physics in the reconnection layer, which has been recognized as a key in the interaction of solar wind with the earth magnetosphere. An out-of-plane quadrupole magnetic field caused by the Hall MHD effects have been observed together with microturbulence inside the reconnection layer. The observed size of the quadrupole field is in agreement with the numerical simulation results as well as with those measured in the neutral sheath of the magnetopause. The dependence of the quadrupole field amplitude on the collisionality supports an idea that the Hall effect plays an important role in the collisionless reconnection where the mean free path of electrons (lambda(mfp)) becomes longer than the characteristic size of the reconnection sheet (6). It is important to note that the Hall effect, which occurs due to 2-D laminar flows of electrons in the reconnection plane, is observed together with the presence of low and high frequency magnetic turbulence, which often has 3-D structures. The observations in MRX have striking similarities to magnetospheric measurements of reconnection region, in which the quadrupole component has also been detected together with magnetic fluctuations.
C1 [Yamada, Masaaki; Ren, Yang; Ji, Hantao] Princeton Univ, Princeton Plasma Phys Lab, Ctr Magnet Self Org Lab & Astrophys Plasmas, Princeton, NJ 08543 USA.
RP Yamada, M (reprint author), Princeton Univ, Princeton Plasma Phys Lab, Ctr Magnet Self Org Lab & Astrophys Plasmas, Princeton, NJ 08543 USA.
RI Yamada, Masaaki/D-7824-2015
OI Yamada, Masaaki/0000-0003-4996-1649
NR 54
TC 0
Z9 0
U1 0
U2 0
PU ASTRONOMICAL SOC PACIFIC
PI SAN FRANCISCO
PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
BN 978-1-58381-237-2
J9 ASTR SOC P
PY 2007
VL 369
BP 391
EP 405
PG 15
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BGY29
UT WOS:000251315600053
ER

PT S
AU Haaland, DM
   Jones, HDT
   Sinclair, MB
   Carson, B
   Branda, C
   Poschet, JF
   Rebeil, R
   Tian, B
   Liu, P
   Brasier, AR
AF Haaland, David M.
   Jones, Howland D. T.
   Sinclair, Michael B.
   Carson, Bryan
   Branda, Catherine
   Poschet, Jens F.
   Rebeil, Roberto
   Tian, Bing
   Liu, Ping
   Brasier, Allan R.
BE Brown, CD
   Druy, MA
   Coates, JP
TI Hyperspectral confocal fluorescence imaging of cells - art. no. 676509
SO NEXT-GENERATION SPECTROSCOPIC TECHNOLOGIES
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Next-Generation Spectroscopic Technologies
CY SEP 10-11, 2007
CL Boston, MA
SP SPIE
DE hyperspectral; confocal microscopy; fluorescence imaging; multivariate
   curve resolution; HeLa cells; macrophage cells
ID GENE-EXPRESSION; IMAGES; OSCILLATIONS; ALGORITHM
AB Confocal fluorescence imaging of biological systems is an important method by which researchers can investigate molecular processes occurring in live cells. We have developed a new 3D hyperspectral confocal fluorescence microscope that can further enhance the usefulness of fluorescence microscopy in studying biological systems. The new microscope can increase the information content obtained from the image since, at each voxel, the microscope records 512 wavelengths from the emission spectrum (490 to 800 nm) while providing optical sectioning of samples with diffraction-limited spatial resolution. When coupled with multivariate curve resolution (MCR) analyses, the microscope can resolve multiple spatially and spectrally overlapped emission components, thereby greatly increasing the number of fluorescent labels, relative to most commercial microscopes, that can be monitored simultaneously. The MCR algorithm allows the "discovery" of all emitting sources and estimation of their relative concentrations without cross talk, including those emission sources that might not have been expected in the imaged cells. In this work, we have used the new microscope to obtain time-resolved hyperspectral images of cellular processes. We have quantitatively monitored the translocation of the GFP-labeled RelA protein (without interference from autofluorescence) into and out of the nucleus of live HeLa cells in response to continuous stimulation by the cytokine, TNF alpha. These studies have been extended to imaging live mouse macrophage cells with YFP-labeled RelA and GFP-labeled IRF3 protein. Hyperspectral imaging coupled with MCR analysis makes possible, for the first time, quantitative analysis of GFP, YFP, and autofluorescence without concern for cross-talk between emission sources. The significant power and quantitative capabilities of the new hyperspectral imaging system are further demonstrated with the imaging of a simple fluorescence dye (SYTO 13) traditionally used to stain the nucleus of live cells. We will demonstrate the microscope system's ability to actually discover and quantify the presence of two separate SYTO 13 fluorescent species shifted in wavelength by only a few nm. These two emission components exhibit very different spatial distributions in macrophage cells (i.e., nucleus vs. cytoplasm + nucleus). Two highly overlapped autofluorescence components in addition to the two SYTO 13 components were also observed, and the spatial distributions of the two autofluorescence components were quantitatively mapped throughout the cells in three dimensions.
C1 [Haaland, David M.; Jones, Howland D. T.; Sinclair, Michael B.; Carson, Bryan; Branda, Catherine; Poschet, Jens F.; Rebeil, Roberto] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Haaland, DM (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 18
TC 1
Z9 1
U1 0
U2 4
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6925-0
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6765
BP 76509
EP 76509
DI 10.1117/12.738152
PG 9
WC Optics; Spectroscopy
SC Optics; Spectroscopy
GA BHH21
UT WOS:000253269800005
ER

PT B
AU van Hest, M
   Miedaner, A
   Curtis, C
   Shaheen, S
   Ginley, D
   Nekuda, J
   Steirer, K
   O'Hayre, R
   Collins, R
AF van Hest, Maikel
   Miedaner, Alex
   Curtis, Calvin
   Shaheen, Sean
   Ginley, David
   Nekuda, Jennifer
   Steirer, Ken
   O'Hayre, Ryan
   Collins, Reuben
GP SIS&T
TI Direct write methods for low cost photovoltaics
SO NIP 23: 23RD INTERNATIONAL CONFERENCE ON DIGITAL PRINTING TECHNOLOGIES,
   TECHNICAL PROGRAM AND PROCEEDINGS/DIGITAL FABRICATION 2007
LA English
DT Proceedings Paper
CT 23rd International Conference on Digital Printing Technologies/Digital
   Fabrication 2007 Conference
CY SEP 16-21, 2007
CL Anchorage, AK
SP Soc Imaging Sci & Technol, Imaging Soc Japan
AB Solar photovoltaics are becoming an increasing part of the energy supply mix, however to have a really significant impact they must become cost competitive with more conventional energy sources. Direct write methods could help toward this significant cost reduction. We are investigating solution precursors and ink based atmospheric deposition approaches to a variety of solar cell materials. The first application we are studying is inkjet printing of contacts for photovoltaics in particular for Si solar cells. We have developed metal organic decomposition inks for silver, nickel, copper and aluminum for example. Conductivities close to that of bulk metals were obtained. The second application is the formation of the. absorber layer in CuInSe2 (CIS) based photovoltaics. CIS/CIGS is the most efficient thin film photovoltaic technology, but typically employ capital intensive PVD materials deposition and subsequent selenization steps. Our approach uses liquid based precursors that can be inkjet printed and processed under atmospheric conditions. Various precursors were identified leading to In2Se3, Cu2Se and CuInSe2 films without a selenization step on various substrates. Details of film deposition and processing will be discussed. The third application is in the field of organic photovoltaics. Here inkjet printing is used to deposit the photoactive layer such as a polythiophene, for example P3HT, and the conducting contact layer such as PEDOT/PSS. Details will be shown on how solvents can influence the quality of the printed material. Direct write processing of these materials may be enabling for this technology leading to an all printed photovoltaics.
C1 [van Hest, Maikel; Miedaner, Alex; Curtis, Calvin; Shaheen, Sean; Ginley, David] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP van Hest, M (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
RI O'Hayre, Ryan/A-8183-2009; Shaheen, Sean/M-7893-2013; Collins,
   Reuben/O-2545-2014
OI Collins, Reuben/0000-0001-7910-3819
NR 0
TC 0
Z9 0
U1 1
U2 4
PU SOC IMAGING SCIENCE & TECHNOLOGY
PI SPRINGFIELD
PA 7003 KILWORTH LANE, SPRINGFIELD, VA 22151 USA
BN 978-0-89208-273-5
PY 2007
BP 824
EP 824
PG 1
WC Imaging Science & Photographic Technology
SC Imaging Science & Photographic Technology
GA BHA62
UT WOS:000251941400190
ER

PT S
AU Mitchell, DA
   Michel, T
   Marletta, MA
AF Mitchell, Douglas A.
   Michel, Thomas
   Marletta, Michael A.
BE Tota, B
   Trimmer, B
TI Effects of S-nitrosation of nitric oxide synthase
SO NITRIC OXIDE
SE Advances in Experimental Biology
LA English
DT Article; Book Chapter
DE nitric oxide; nitric oxide synthase; S-nitrosation; S-nitrosylation;
   transnitrosation; zinc tetrathiolate; NOS; biotin switch; nitrosothiol
   relay; signal transduction; posttranslational modifications; specificity
   of nitrosation; inducible NOS; endothelial NOS; neuronal NOS
ID DEPENDENT FORMALDEHYDE DEHYDROGENASE; NF-KAPPA-B; GENE KNOCKOUT MICE;
   ENOS-DERIVED NO; ENDOTHELIAL-CELLS; HEME DOMAIN; SER(847)
   PHOSPHORYLATION; PROTEIN-PHOSPHORYLATION; RYANODINE RECEPTOR;
   ANAPHYLACTIC SHOCK
AB Nitric oxide (NO) is a key mammalian signaling molecule that affects numerous physiological processes. Mammals possess three isoforms of nitric oxide synthase (NOS): endothelial (eNOS), neuronal (nNOS), and inducible (iNOS). These isoforms differ in their tissue distribution, cellular location, regulation, and NO output. NO synthesized by eNOS and nNOS acts in a paracrine fashion, whereby NO generated in one cell acts upon an adjacent cell by binding to and activating soluble guanylyl cyclase (sGC). Activation of sGC by NO leads to a several hundredfold enhancement of cyclic guanidine mono-phosphate (cGMP) synthesis. Notable outcomes of elevated cGMP levels are neurotransmission and smooth muscle relaxation. iNOS is capable of synthesizing much higher steady-state levels of NO, and the toxicity of NO is harnessed as part of the innate immune response. In recent years, it has become increasingly clear that NO targets proteins other than sGC. S-nitrosation is an example of nonclassical NO signaling, defined as sGC/cGMP-independent, and has garnered attention with regard to the regulation of NOS activity both in vitro and in vivo. The purpose of this review is to cover what is currently known about the S-nitrosation of NOS isoforms.
C1 [Mitchell, Douglas A.; Marletta, Michael A.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   [Marletta, Michael A.] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
   [Marletta, Michael A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys Biosci, Berkeley, CA 94720 USA.
   [Michel, Thomas] Harvard Univ, Brigham & Womens Hosp, Sch Med, Div Cardiovasc, Boston, MA 02115 USA.
   [Michel, Thomas] Vet Affairs Boston Healthcare Syst, W Roxbury, MA 02132 USA.
RP Marletta, MA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM marletta@berkeley.edu
NR 141
TC 1
Z9 1
U1 0
U2 1
PU ELSEVIER NORTH HOLLAND
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1872-2423
BN 978-0-08-054620-9
J9 ADV EXP BIOL
PY 2007
VL 1
BP 151
EP 179
DI 10.1016/S1872-2423(07)01007-1
PG 29
WC Biology
SC Life Sciences & Biomedicine - Other Topics
GA BCU83
UT WOS:000311536600008
ER

PT S
AU Rameika, RA
AF Rameika, R. A.
BE Wilkes, RJ
TI The fermilab neutrino beam program
SO NNN06: NEXT GENERATION NUCLEON DECAY AND NEUTRINO DETECTORS 2006
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT International Workshop on Next Generation Nucleon Decay and Neutrino
   Detectors
CY SEP 21-23, 2006
CL Seattle, WA
SP Burle Ind Inc, CAEN Technol Inc, Univ Washington, Phys Dept, Weiner Plein & Baus Ltd
AB This talk presents an overview of the Fermilab Neutrino Beam Program. Results from completed experiments as well as the status and outlook for current experiments is given. Emphasis is given to current activities towards planning for a future program.
C1 Fermilab Natl Accelerator Lab, Batavia, IL 60506 USA.
RP Rameika, RA (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60506 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0458-8
J9 AIP CONF PROC
PY 2007
VL 944
BP 35
EP 43
PG 9
WC Physics, Nuclear
SC Physics
GA BHI42
UT WOS:000253415100006
ER

PT S
AU Bishai, M
AF Bishai, Mary
CA Study Grp
BE Wilkes, RJ
TI Status of the US long baseline neutrino experiment study
SO NNN06: NEXT GENERATION NUCLEON DECAY AND NEUTRINO DETECTORS 2006
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT International Workshop on Next Generation Nucleon Decay and Neutrino
   Detectors
CY SEP 21-23, 2006
CL Seattle, WA
SP Burle Ind Inc, CAEN Technol Inc, Univ Washington, Phys Dept, Weiner Plein & Baus Ltd
DE neutrino; oscillation; mixing; long baseline
ID DETECTOR
AB The US Long Baseline Neutrino Experiment Study was commissioned jointly by Brookhaven National Laboratory and Fermi National Accelerator Laboratory to investigate the potential for future U.S. based long baseline neutrino oscillation experiments beyond the currently planned program. The Study focused on MW class conventional neutrino beams that can be produced at Fermilab or BNL. The experimental baselines are based on two possible detector locations: 1) off-axis to the existing Fermilab NuMI beamline at baselines of 700 to 810 km and 2)NSF's proposed future Deep Underground Science and Engineering Laboratory (DUSEL) at baselines greater than 1000km. Two detector technologies are considered: a megaton class Water Cherenkov detector deployed deep underground at a DUSEL site, or a 100kT Liquid Argon Time-Projection Chamber (TPC) deployed on the surface at any of the proposed sites. The physics sensitivities of the proposed experiments are summarized. We find that conventional horn focused wide-band neutrino beam options from Fermilab or BNL aimed at a massive detector with a baseline of > 1000km have the best sensitivity to CP violation and the neutrino mass hierarchy for values of the mixing angle theta(13) down to 2.2 degrees.
C1 [Bishai, Mary] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Bishai, M (reprint author), Brookhaven Natl Lab, Dept Phys, POB 5000, Upton, NY 11973 USA.
NR 19
TC 0
Z9 0
U1 1
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0458-8
J9 AIP CONF PROC
PY 2007
VL 944
BP 72
EP 81
PG 10
WC Physics, Nuclear
SC Physics
GA BHI42
UT WOS:000253415100011
ER

PT S
AU Yanagisawa, C
   Jung, CK
   Le, PT
   Viren, B
AF Yanagisawa, C.
   Jung, C. K.
   Le, P. T.
   Viren, B.
BE Wilkes, RJ
TI Background study on v(e) appearance in a very long baseline neutrino
   oscillation experiments with a large water Cherenkov detector
SO NNN06: NEXT GENERATION NUCLEON DECAY AND NEUTRINO DETECTORS 2006
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Next Generation Nucleon Decay and Neutrino
   Detectors
CY SEP 21-23, 2006
CL Seattle, WA
SP Burle Ind Inc, CAEN Technol Inc, Univ Washington, Phys Dept, Weiner Plein & Baus Ltd
DE neutrino oscillation; water Cherenkov
AB There is a growing interest in very long baseline neutrino oscillation as a machinery to probe the last three unmeasured neutrino oscillation parameters: the mixing angle Sin(2)2 theta(13), the possible CP violating phase delta(CP) and the mass hierarchy, namely, the sign of Delta m(32)(2). Despite very successful performance of water Cherenkov detectors such as IMB, Kamiokande and Super- Kamiokande, it is not well known that this detector technology can also provide required performance for a next generation of long baseline neutrino oscillation experiment. This report presents the latest effort to prove that a large water Cherenkov detector will be adequate for rather difficult task of detecting vs from the neutrino oscillation v(mu) -> v(e) efficiently over a potentially large background from gamma s from pi(0) produced by neutral current.
C1 [Yanagisawa, C.; Jung, C. K.; Le, P. T.] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
   [Viren, B.] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Yanagisawa, C (reprint author), SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
NR 8
TC 2
Z9 2
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0458-8
J9 AIP CONF PROC
PY 2007
VL 944
BP 92
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHI42
UT WOS:000253415100013
ER

PT S
AU Mendez, EE
   Newaz, AKM
   Song, W
   Nielsen, B
AF Mendez, E. E.
   Newaz, A. K. M.
   Song, W.
   Nielsen, B.
BE Tacano, M
   Yamamoto, Y
   Nakao, M
TI Non-poissonian shot noise in Tunneling semiconductor heterostructures
SO NOISE AND FLUCTUATIONS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 19th International Conference on Noise and Fluctuations
CY SEP 09-14, 2007
CL Tokyo, JAPAN
SP Japanese Assoc Sci, Art & Technol Fluctuat, IEEE Electron Devices Soc, Meisei Univ, Frontier Res Ctr Global Environm Sci, Aihara Complex Modeling Project, ERATO, JST
DE shot noise; semiconductor heterostructures; resonant tunneling;
   superlattices
AB We have found experimentally that when the motion of electrons is correlated in multibarrier tunneling semiconductor heterostructures, the current spectral density of the shot noise is non-Poissonian. That the value is smaller or larger than 2eI depends on whether the correlation is negative or positive. Although existing models can qualitatively explain our results, they cannot account quantitatively for some of the findings, suggesting an incomplete understanding of noise in multi-barrier structures..
C1 [Mendez, E. E.; Newaz, A. K. M.; Song, W.; Nielsen, B.] SUNY Stony Brook, Stony Brook, NY 11794 USA.
   [Newaz, A. K. M.] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
   [Newaz, A. K. M.] Washington Univ, St Louis, MO 63130 USA.
   [Song, W.] Korea Res Inst Stand & Sci, Daejeon 305340, South Korea.
RP Mendez, EE (reprint author), SUNY Stony Brook, Stony Brook, NY 11794 USA.
FU National Science Foundation of the US [DMR-0305384]
FX This work has been sponsored by the National Science Foundation of the
   US (Grant No. DMR-0305384).
NR 4
TC 1
Z9 1
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0432-8
J9 AIP CONF PROC
PY 2007
VL 922
BP 177
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Multidisciplinary;
   Physics, Condensed Matter
SC Engineering; Physics
GA BGO65
UT WOS:000249049500036
ER

PT S
AU Martin, I
   Bulaevskii, L
   Shnirman, A
   Galperin, YM
AF Martin, I.
   Bulaevskii, L.
   Shnirman, A.
   Galperin, Y. M.
BE Macucci, M
   Vandamme, LKJ
   Ciofi, C
   Weissman, MB
TI Stationary and non-stationary noise in superconducting quantum devices -
   art. no. 660005
SO Noise and Fluctuations in Circuits, Devices, and Materials
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Noise and Fluctuations in Circuits, Devices and Materials
CY MAY 21-24, 2007
CL Florence, ITALY
SP SPIE
DE decoherence; quantum computing; superconductivity; glass; 1/f noise
ID JOSEPHSON-JUNCTIONS; LOW-TEMPERATURES; GLASSES; STATES; FLUCTUATIONS;
   DIFFUSION; SPECTRUM; PHONONS; VOLTAGE; SOLIDS
AB We consider two representative problems that deal with the fluctuator-induced decoherence from two very different perspectives - microscopic and macroscopic. In the first part, we consider an individual two-level system and/or is optically inside a Josephson junction shunted by a resistor. If the TLS modulates the Josephson energactive, it can be Rabi driven by the Josephson oscillation. The Rabi oscillations, in turn, translate into oscillations of current and voltage which can be detected in noise measurements. This effect provides an option to fully characterize the TLS inside Josephson junction and to find the TLS's contribution to the decoherence when the junction is used as a qubit. In the second part, we study the contribution of an ensemble of non-stationary glassy charge fluctuators on qubit decoherence. Low-temperature dynamics of insulating glasses is dominated by a macroscopic concentration of tunneling two-level systems. Due to exponentially broad distribution of their tunneling rates and the finite experimental manipulation timescales, some of the fluctuators are temporarily stuck in high-energy non-thermal states. We find that at low enough temperatures, non-stationary contribution due to these slow non-thermal fluctuators can dominate the stationary (thermal) one, and discuss how this effect can be minimized.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87544 USA.
RP Martin, I (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87544 USA.
NR 38
TC 0
Z9 0
U1 0
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6737-9
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6600
BP 60005
EP 60005
AR 660005
DI 10.1117/12.725639
PG 12
WC Engineering, Electrical & Electronic; Physics, Condensed Matter
SC Engineering; Physics
GA BGR48
UT WOS:000250107300003
ER

PT S
AU Reichhardt, C
   Reichhardt, CJO
   Bishop, AR
AF Reichhardt, C.
   Reichhardt, C. J. Olson
   Bishop, A. R.
BE Macucci, M
   Vandamme, LKJ
   Ciofi, C
   Weissman, MB
TI Noise and hysteresis in charged stripe, checkerboard, and clump forming
   systems - art. no. 66001B
SO Noise and Fluctuations in Circuits, Devices, and Materials
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Noise and Fluctuations in Circuits, Devices and Materials
CY MAY 21-24, 2007
CL Florence, ITALY
SP SPIE
DE noise; fluctuations; charge ordering
ID CONDENSED MATTER; PHASE-SEPARATION; ELECTRON LIQUID; SUPERCONDUCTORS;
   FIELD; MODEL
AB We numerically examine noise fluctuations and hysteresis phenomena in charged systems that form stripe, labyrinth or clump patterns. It is believed that charge inhomogeneities of this type arise in two-dimensional (2D) quantum hall systems and in electron crystal structures in high temperature superconductors, while related patterns appear in manganites and type-I superconductors. Recent noise and transport experiments in two-dimensional electron gases and high temperature superconducting samples revealed both 1/f(alpha) noise signatures and hysteretic phenomena. Using numerical simulations we show that 1/f(alpha) noise fluctuations and hysteresis are generic features that occur in charge systems which undergo a type of phase separation that results in stripes, clumps, checkerboards, or other inhomogeneous patterns. We find that these systems exhibit 1/f(alpha) fluctuations with 1.2 < a < 1.8, rather than simple 1/f or 1/f(2) fluctuations. We also propose that the 2D metal insulator transition may be associated with a clump electron glass phase rather than a Wigner glass phase.
C1 Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Reichhardt, C (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, POB 1663, Los Alamos, NM 87545 USA.
NR 34
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6737-9
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6600
BP B6001
EP B6001
AR 66001B
DI 10.1117/12.724614
PG 11
WC Engineering, Electrical & Electronic; Physics, Condensed Matter
SC Engineering; Physics
GA BGR48
UT WOS:000250107300038
ER

PT S
AU Jonsson, JC
   Rubin, M
AF Jonsson, Jacob C.
   Rubin, Mike
BE Winston, R
   Koshel, RJ
TI Light-loss when measuring transmittance of thick scattering samples with
   an integrating sphere - art. no. 667007
SO NONIMAGING OPTICS AND EFFICIENT ILLUMINATION SYSTEMS IV
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Nonimaging Optics and Efficient Illumination Systems IV
CY AUG 26-27, 2007
CL San Diego, CA
SP SPIE
DE light scattering; ray-tracing; integrating sphere; fritted glass
AB Light scattering materials have several uses in solar energy applications, ranging from a purely aesthetic function as a cover glass to a way of increasing the path-length of photons inside a semiconductor. Knowing the transmittance of such elements is of essence to properly model, simulate, and design a solar energy system. The traditional method for obtaining the transmittance is to use a spectrophotometer fitted with an integrating sphere detector. However, it is well-known that most commercial integrating spheres underestimate the true transmittance of thick scattering samples. This study investigates a method to obtain quantitative values of the losses associated with measuring a scattering sample. The International Commission on Glass (ICG TC-10) is conducting an inter-laboratory comparison (ILC) on scattering samples to improve the methodology for characterizing such samples. A fritted glass sample similar to one in the ILC was used as an example. One side of a clear glass sample has a highly scattering layer. The bi-directional transmittance distribution function (BTDF) for the sample was obtained using a goniophotometer and then used as scattering function in a ray-tracing simulation. The ray-tracer was configured to report the amount of light exiting all six surfaces of the sample as well as through various ports defined by the integrating sphere geometry. The sample was then measured with a commercial integrating sphere in several different configurations, verifying the accuracy of the model.
C1 [Jonsson, Jacob C.; Rubin, Mike] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Jonsson, JC (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd MS70A-2255, Berkeley, CA 94720 USA.
NR 12
TC 2
Z9 2
U1 0
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6818-5
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6670
BP 67007
EP 67007
DI 10.1117/12.734885
PG 8
WC Optics
SC Optics
GA BGZ42
UT WOS:000251495400006
ER

PT J
AU Firestone, RB
AF Firestone, R. B.
TI Nuclear data sheets for A=23
SO NUCLEAR DATA SHEETS
LA English
DT Review
ID HIGH-SPIN STATES; NEUTRON-RICH NUCLEI; LOW-LYING STATES; ANALYZING-POWER
   MEASUREMENTS; BEAM GAMMA-SPECTROSCOPY; SINGLE-PARTICLE STATES; ATOMIC
   MASS EVALUATION; ENERGY-LEVELS; BETA-DECAY; RESONANCE FLUORESCENCE
AB This evaluation of A=23 has been updated from previous evaluations published in 1998En04, 1990En08, and 1978En02. Coverage includes properties of adopted levels and gamma rays, decay-scheme data (energies, intensities and placement of radiations), and cross reference entries. The following tables continue the tradition of showing the systematic relationships between levels in A=23. These assignments are based on spectroscopic factors and energy differences where Delta E-x=E-x(Mg-23)-E-x (Na-23).
C1 Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
RP Firestone, RB (reprint author), Lawrence Berkeley Natl Lab, Div Nucl Sci, MS 88R0192,1 Cyclotron Rd, Berkeley, CA 94720 USA.
OI Firestone, Richard/0000-0003-3833-5546
NR 187
TC 32
Z9 32
U1 0
U2 0
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD JAN
PY 2007
VL 108
IS 1
BP 1
EP +
DI 10.1016/j.nds.2007.01.002
PG 76
WC Physics, Nuclear
SC Physics
GA 139MO
UT WOS:000244436200001
ER

PT J
AU Kozioziemski, BJ
   Montgomery, DS
   Sater, JD
   Moody, JD
   Gautier, C
   Pipes, JW
AF Kozioziemski, B. J.
   Montgomery, D. S.
   Sater, J. D.
   Moody, J. D.
   Gautier, C.
   Pipes, J. W.
TI Solid deuterium-tritium surface roughness in a beryllium inertial
   confinement fusion shell
SO NUCLEAR FUSION
LA English
DT Article
ID RADIOACTIVELY INDUCED SUBLIMATION; PHASE-CONTRAST MICROSCOPY; HARD
   X-RAYS; SYNCHROTRON-RADIATION; CAPSULES; LAYERS; ICE; FACILITY; TARGETS;
   OBJECTS
AB Solid deuterium-tritium (D-T) fuel layers for inertial confinement fusion experiments were formed inside a 2 mm diameter beryllium shell and were characterized using phase-contrast enhanced x-ray imaging. The solid D-T surface roughness is found to be 0.4 mu m for modes 7-128 at 1.5 K below the melting temperature. The layer roughness is found to increase with decreasing temperature, in agreement with previous visible light characterization studies. However, phase-contrast enhanced x-ray imaging provides a more robust surface roughness measurement than visible light methods. The new x-ray imaging results demonstrate clearly that the surface roughness decreases with time for solid D-T layers held at 1.5 K below the melting temperature.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
   Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA.
RP Kozioziemski, BJ (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM kozioziemski1@llnl.gov
NR 32
TC 7
Z9 7
U1 1
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0029-5515
EI 1741-4326
J9 NUCL FUSION
JI Nucl. Fusion
PD JAN
PY 2007
VL 47
IS 1
BP 1
EP 8
DI 10.1088/0029-5515/47/1/001
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 132PE
UT WOS:000243953900004
ER

PT J
AU Amundson, J
   Pellico, W
   Spentzouris, L
   Spentzouris, P
   Sullivan, T
AF Amundson, J.
   Pellico, W.
   Spentzouris, L.
   Spentzouris, P.
   Sullivan, T.
TI An experimentally robust technique for halo measurement using the IPM at
   the Fermilab Booster
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE halo; ion profile monitor
AB We propose a model-independent quantity, L/G, to characterize non-Gaussian tails in beam profiles observed with the Fermilab Booster Ion Profile Monitor. This quantity can be considered a measure of beam halo in the Booster. We use beam dynamics and detector simulations to demonstrate that L/G is superior to kurtosis as an experimental measurement of beam halo when realistic beam shapes, detector effects and uncertainties are taken into account. We include the rationale and method of calculation for L/G in addition to results of the experimental studies in the Booster where we show that L/G is a useful halo discriminator. (c) 2006 Elsevier B.V. All rights reserved.
C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   IIT, Dept Biol Chem & Phys Sci, Chicago, IL 60616 USA.
RP Amundson, J (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA.
EM amundson@fnal.gov; spentz@fnal.gov
NR 10
TC 2
Z9 2
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD JAN 1
PY 2007
VL 570
IS 1
BP 1
EP 9
DI 10.1016/j.nima.2006.09.101
PG 9
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 131AZ
UT WOS:000243841600001
ER

PT J
AU Berg, JS
AF Berg, J. Scott
TI Amplitude dependence of time of flight and its connection to
   chromaticity
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE synchro-betatron coupling; longitudinal; transverse; chromaticity; FFAG;
   accelerator
AB In general, the time of flight of a charged particle in an accelerator will depend on the particle's transverse amplitude. This effect can become important in machines with large transverse emittances, such as muon accelerators. We will describe the effect, its physical origin, and the circumstances where it becomes important. We will then demonstrate that the effect is directly related to chromaticity. We will describe the effect on the longitudinal dynamics in various circumstances, including linacs and fixed field alternating gradient accelerators (FFAGs). We will describe methods for correcting the effect, particularly in FFAGs. (c) 2006 Elsevier B.V. All rights reserved.
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Berg, JS (reprint author), Brookhaven Natl Lab, Bldg 901A,POB 5000, Upton, NY 11973 USA.
EM jsberg@bnl.gov
RI Berg, Joseph/E-8371-2014
OI Berg, Joseph/0000-0002-5955-6973
NR 26
TC 16
Z9 16
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD JAN 1
PY 2007
VL 570
IS 1
BP 15
EP 21
DI 10.1016/j.nima.2006.09.099
PG 7
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 131AZ
UT WOS:000243841600003
ER

PT J
AU Kanai, Y
   Ueno, M
   Kataoka, J
   Arimoto, M
   Kawai, N
   Yamamoto, K
   Mizuno, T
   Fukazawa, Y
   Kiss, M
   Ylinen, T
   Bettolo, CM
   Carlson, P
   Klamra, W
   Pearce, M
   Chen, P
   Craig, B
   Kamae, T
   Madejski, G
   Ng, JST
   Rogers, R
   Tajima, H
   Thurston, TS
   Saito, Y
   Takahashi, T
   Gunji, S
   Bjornsson, CI
   Larsson, S
   Ryde, F
   Bogaert, G
   Kishimoto, S
AF Kanai, Y.
   Ueno, M.
   Kataoka, J.
   Arimoto, M.
   Kawai, N.
   Yamamoto, K.
   Mizuno, T.
   Fukazawa, Y.
   Kiss, M.
   Ylinen, T.
   Bettolo, C. Marini
   Carlson, P.
   Klamra, W.
   Pearce, M.
   Chen, P.
   Craig, B.
   Kamae, T.
   Madejski, G.
   Ng, J. S. T.
   Rogers, R.
   Tajima, H.
   Thurston, T. S.
   Saito, Y.
   Takahashi, T.
   Gunji, S.
   Bjornsson, C-I
   Larsson, S.
   Ryde, F.
   Bogaert, G.
   Kishimoto, S.
TI Beam test of a prototype phoswich detector assembly for the PoGOLite
   astronomical soft gamma-ray polarimeter
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE polarization; soft gamma-ray; hard X-ray; balloon experiment
ID CRAB-NEBULA; HXD-II; POLARIZATION; TELESCOPE; EMISSION; FLUX; ASTRO-E2;
   PULSAR; BURST
AB We report about the beam test on a prototype of the balloon-based astronomical soft gamma-ray polarimeter, PoGOLite (Polarized Gamma-ray Observer-Light Version) conducted at KEK Photon Factory, a synchrotron radiation facility in Japan. The synchrotron beam was set at 30, 50, and 70 keV and its polarization was monitored by a calibrated polarimeter. The goal of the experiment was to validate the flight design of the polarimeter. PoGOLite is designed to measure polarization by detecting a Compton scattering and the subsequent photo-absorption in an array of 217 well-type phoswich detector cells (PDCs). The test setup included a first flight model PDC and a front-end electronics to select and reconstruct valid Compton scattering events. The experiment has verified that the flight PDC can detect recoil electrons and select valid Compton scattering events down to 30 keV from background. The measure azimuthal modulations (34.4%, 35.8% and 37.2% at 30, 50, and 70 keV, respectively) agreed within 10% (relative) with the predictions by Geant4 implemented with dependence on the initial and final photon polarizations. (c) 2006 Elsevier B.V. All rights reserved.
C1 Tokyo Inst Technol, Tokyo 1528551, Japan.
   Hiroshima Univ, Hiroshima 730, Japan.
   Royal Inst Technol, Stockholm, Sweden.
   Stanford Linear Accelerator Ctr, Menlo Pk, CA USA.
   Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa, Japan.
   Yamagata Univ, Yamagata 990, Japan.
   Stockholm Univ, S-10691 Stockholm, Sweden.
   Ecole Polytech, F-91128 Palaiseau, France.
   High Energy Accelerator Res Organizat, Inst Mat Struct Sci, Tsukuba, Ibaraki, Japan.
RP Kanai, Y (reprint author), Tokyo Inst Technol, 2-12-1 Ookayama, Tokyo 1528551, Japan.
EM kanai@hp.phys.titech.ac.jp
RI XRAY, SUZAKU/A-1808-2009; 
OI Larsson, Stefan/0000-0003-0716-107X
NR 32
TC 13
Z9 13
U1 1
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD JAN 1
PY 2007
VL 570
IS 1
BP 61
EP 71
DI 10.1016/j.nima.2006.09.109
PG 11
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 131AZ
UT WOS:000243841600008
ER

PT J
AU Jaffe, JE
   Jordan, DV
   Peurrung, AJ
AF Jaffe, J. E.
   Jordan, D. V.
   Peurrung, A. J.
TI Energy nonlinearity in radiation detection materials: Causes and
   consequences
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE nonproportionality; scintillator; semiconductor; radiation detector
ID LIGHT YIELD NONPROPORTIONALITY; PURITY GERMANIUM DETECTORS; MEASURED
   ELECTRON RESPONSE; GEK-ABSORPTION EDGE; NON-PROPORTIONALITY; X-RAY;
   SCINTILLATION PROPERTIES; RESOLUTION SCINTILLATOR; CHARGED-PARTICLES;
   ROOM-TEMPERATURE
AB The phenomenology and present theoretical understanding of energy nonlinearity (nonproportionality) in radiation detection materials is reviewed, with emphasis on gamma-ray spectroscopy. Scintillators display varying degrees and patterns of nonlinearity, while semiconductor detectors are extremely linear, and gas detectors show a characteristic form of nonproportionality associated with core levels. The relation between nonlinear response (to both primary particles and secondary electrons) and spectrometer resolution is also discussed. We review the qualitative ideas about the origin of nonlinearity in scintillators that have been proposed to date, with emphasis on transport and recombination of electronic excitations. Recent computational and experimental work on the basic physics of scintillators is leading towards a better understanding of energy nonlinearity and should result in new, more linear scintillator materials in the near future. (c) 2006 Elsevier B.V. All rights reserved.
C1 Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA.
   Pacific NW Natl Lab, Natl Secur Directorate, Richland, WA 99352 USA.
RP Jaffe, JE (reprint author), Pacific NW Natl Lab, Fundamental Sci Directorate, Mail Stop K1-83,Box 999, Richland, WA 99352 USA.
EM john.jaffe@pnl.gov
NR 72
TC 29
Z9 29
U1 0
U2 4
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 JAN 1
PY 2007
VL 570
IS 1
BP 72
EP 83
DI 10.1016/j.nima.2006.09.097
PG 12
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 131AZ
UT WOS:000243841600009
ER

PT J
AU Mihailescu, L
   Vetter, KM
   Burks, MT
   Hull, EL
   Craig, WW
AF Mihailescu, L.
   Vetter, K. M.
   Burks, M. T.
   Hull, E. L.
   Craig, W. W.
TI SPEIR: A Ge Compton camera
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE Compton camera; HPGe detectors; gamma-ray tracking; gamma-ray imaging;
   Compton scattering
ID IMAGE-RECONSTRUCTION; TELESCOPE COMPTEL; GAMMA-CAMERA; DETECTORS;
   PERFORMANCE; SIMULATION; SCATTERING; ALGORITHM
AB The SPEctroscopic Imager for gamma-Rays (SPEIR) is a Compton scatter gamma-ray imaging system of high efficiency and spectroscopic resolution with a 4-pi field-of-view. The imaging system consists of double-sided segmented (DSSD) planar Ge detectors, an acquisition system instrumenting the detectors, and a set of data analysis methods. The analysis methods employ event reconstruction algorithms that increase the intrinsic position resolution and granularity of the detectors, and provide photon scattering information relevant for Compton imaging. Published by Elsevier B.V.
C1 Lawrence Livermore Natl Lab, Livermore, CA USA.
RP Mihailescu, L (reprint author), Lawrence Livermore Natl Lab, Livermore, CA USA.
EM mihailescul@llnl.gov
NR 27
TC 23
Z9 23
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD JAN 1
PY 2007
VL 570
IS 1
BP 89
EP 100
DI 10.1016/j.nima.2006.09.111
PG 12
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 131AZ
UT WOS:000243841600011
ER

PT J
AU Deptuch, G
   Besson, A
   Carini, GA
   Siddons, DP
   Szeleniak, M
   Winter, M
AF Deptuch, G.
   Besson, A.
   Carini, G. A.
   Siddons, D. P.
   Szeleniak, M.
   Winter, M.
TI Tests of monolithic active pixel sensors at national synchrotron light
   source
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE Monolithic Active Pixel Sensors; synchrotron radiation; X-ray imaging;
   direct detection; soft X-rays; pixel detectors
ID CHARGED-PARTICLE TRACKING
AB The paper discusses basic characterization of Monolithic Active Pixel Sensors (MAPS) carried out at the X12A beam-line at National Synchrotron Light Source (NSLS), Upton, NY, USA. The tested device was a MIMOSA V (MV) chip, back-thinned down to the epitaxial layer. This 1M pixels device features a pixel size of 17 x 17 mu m(2) and was designed in a 0.6 mu m CMOS process. The X-ray beam energies used range from 5 to 12 keV. Examples of direct X-ray imaging capabilities are presented. (c) 2006 Elsevier B.V. All rights reserved.
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
   Univ Strasbourg 1, CNRS, IN2P3, IPHC, F-67037 Strasbourg 02, France.
RP Deptuch, G (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM deptuch@ieee.org
NR 11
TC 3
Z9 3
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD JAN 1
PY 2007
VL 570
IS 1
BP 165
EP 170
DI 10.1016/j.nima.2006.09.092
PG 6
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 131AZ
UT WOS:000243841600020
ER

PT J
AU Jeon, D
   Stovall, J
   Takeda, H
   Nath, S
   Billen, J
   Young, L
   Kisselev, I
   Shishlo, A
   Aleksandrov, A
   Assadi, S
   Chu, CM
   Cousineau, S
   Danilov, V
   Galambos, J
   Henderson, S
   Kim, S
   Kravchuk, L
   Tanke, E
AF Jeon, D.
   Stovall, J.
   Takeda, H.
   Nath, S.
   Billen, J.
   Young, L.
   Kisselev, I.
   Shishlo, A.
   Aleksandrov, A.
   Assadi, S.
   Chu, C. M.
   Cousineau, S.
   Danilov, V.
   Galambos, J.
   Henderson, S.
   Kim, S.
   Kravchuk, L.
   Tanke, E.
TI Acceptance scan technique for the drift tube linac of the spallation
   neutron source
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE high intensity beam; drift tube linac; acceptance; phase scan
AB For high intensity proton accelerators, it is vital to reduce the machine activation by minimizing the beam loss from many sources. One of such sources is longitudinal mismatch. To minimize a potential mismatch, it is important to set accurately the rf set-point (rf field amplitude and phase) of a high-intensity linac such as the drift tube linac (DTL) of the spallation neutron source. A widely used technique called the acceptance scan was studied extensively and applied successfully to tune the DTL tanks since the initial commissioning. From the acceptance scan one can obtain the longitudinal beam profile at the entrance of each DTL tank. But except tank 1, acceptance scan alone cannot determine the incoming beam energy deviation, leading to small uncertainties in the rf set point. Published by Elsevier B.V.
C1 Oak Ridge Natl Lab, SNS Project, Oak Ridge, TN 37831 USA.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   RAS, Inst Nucl Res, Troitsk, Russia.
RP Jeon, D (reprint author), Oak Ridge Natl Lab, SNS Project, Oak Ridge, TN 37831 USA.
EM jeond@ornl.gov
RI Jeon, Dong-O/S-2137-2016; 
OI Jeon, Dong-O/0000-0001-6482-5878; KIM, SANG-HO/0000-0001-5190-9909
NR 3
TC 1
Z9 1
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD JAN 1
PY 2007
VL 570
IS 1
BP 187
EP 191
DI 10.1016/j.nima.2006.10.006
PG 5
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 131AZ
UT WOS:000243841600024
ER

PT J
AU Debbe, R
   Jorgensen, CE
   Olness, J
   Yin, Z
AF Debbe, R.
   Jorgensen, C. E.
   Olness, J.
   Yin, Z.
TI The BRAHMS ring imaging Cherenkov detector
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE RICH; photo-multiplier based RICH; high index of refraction
AB A Ring Imaging Cherenkov detector built for the BRAHMS experiment at the Brookhaven RHIC is described. This detector has a high index of refraction gas radiator. Cherenkov light is focused on a photo-multiplier based photon detector with a large spherical mirror. The combination of momentum and ring radius measurement provides particle identification from 2.5 to 35 GeV/c for pions and kaons and well above 40 GeV/c for protons during runs that had the radiator index of refraction set at n - 1 = 1700 x 10(-6). Published by Elsevier B.V.
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
   CERN, PH EP, CH-1211 Geneva 23, Switzerland.
   Huazhong Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
RP Debbe, R (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM debbe@bnl.gov
NR 7
TC 12
Z9 12
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD JAN 1
PY 2007
VL 570
IS 1
BP 216
EP 222
DI 10.1016/j.nima.2006.09.100
PG 7
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 131AZ
UT WOS:000243841600027
ER

PT J
AU Mancusi, D
   Sihver, L
   Gustafsson, K
   La Tessa, C
   Guetersloh, SB
   Zeitlin, CJ
   Miller, J
   Heilbronn, LH
   Niita, K
   Sato, T
   Nakashima, H
   Murakami, T
   Iwata, Y
AF Mancusi, Davide
   Sihver, Lembit
   Gustafsson, Katarina
   La Tessa, Chiara
   Guetersloh, Stephen B.
   Zeitlin, Cary J.
   Miller, Jack
   Heilbronn, Lawrence H.
   Niita, Koji
   Sato, Tatsuhiko
   Nakashima, Hiroshi
   Murakami, Takeshi
   Iwata, Yoshiyuki
TI PHITS - benchmark of partial charge-changing cross sections for
   intermediate-mass systems
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
   INTERACTIONS WITH MATERIALS AND ATOMS
LA English
DT Article
DE Monte Carlo methods; heavy ions; transport codes; charge-changing cross
   sections; benchmarking
ID ACCURATE UNIVERSAL PARAMETERIZATION; HEAVY-ION COLLISIONS; TARGETS;
   MODEL
AB The PHITS (Particle and Heavy Ion Transport System) code is a three-dimensional Monte Carlo code that is able to simulate the transport of nuclei and other particles in complicated geometries and calculate fluxes, doses, energy-deposition distributions and many other observables. Among its many possible fields of application, it can be used e.g. to design and optimise radiation shields for space vessels. However, the reliability of the predictions of the code depends directly on the certified accuracy of the code components, i.e. the models the code uses to estimate the quantities necessary for the transport calculation. As a part of a comprehensive benchmarking program, we have investigated the possibility of using PHITS to calculate partial charge-changing cross sections and we have compared the results with measurements performed by some of us (CZ, LH, JM, SG). The results, although limited, suggest that the current reaction-cross-section models might be inadequate for use in space radioprotection; we therefore claim the need for a thorough benchmarking of the models and for new reaction-cross-section measurements and experimental techniques. (c) 2006 Elsevier B.V. All rights reserved.
C1 Chalmers, S-41296 Gothenburg, Sweden.
   Roanoke Coll, Salem, VA 24153 USA.
   Lawrence Berkeley Lab, Berkeley, CA USA.
   Res Org Informat Sci & Technol, Tokai, Ibaraki, Japan.
   Japan Atom Energy Agcy, Tokai, Ibaraki, Japan.
   Natl Inst Radiol Sci, Chiba 260, Japan.
RP Mancusi, D (reprint author), Chalmers, S-41296 Gothenburg, Sweden.
EM mancusi@chalmers.se
RI Sato, Tatsuhiko/G-5964-2012; Heilbronn, Lawrence/J-6998-2013
OI Mancusi, Davide/0000-0002-2518-8228; Sato,
   Tatsuhiko/0000-0001-9902-7083; Heilbronn, Lawrence/0000-0002-8226-1057
NR 18
TC 14
Z9 14
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-583X
J9 NUCL INSTRUM METH B
JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms
PD JAN
PY 2007
VL 254
IS 1
BP 30
EP 38
DI 10.1016/j.nimb.2006.10.070
PG 9
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Atomic, Molecular & Chemical; Physics, Nuclear
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 130VF
UT WOS:000243826400005
ER

PT J
AU Floyd, CE
   Sharma, AC
   Bender, JE
   Kapadia, AJ
   Xia, JQ
   Harrawood, BP
   Tourassi, GD
   Lo, JY
   Kiser, MR
   Crowell, AS
   Pedroni, RS
   Macri, RA
   Tajima, S
   Howell, CR
AF Floyd, Carey E., Jr.
   Sharma, Amy C.
   Bender, Janelle E.
   Kapadia, Anuj J.
   Xia, Jessie Q.
   Harrawood, Brian P.
   Tourassi, Georgia D.
   Lo, Joseph Y.
   Kiser, Matthew R.
   Crowell, Alexander S.
   Pedroni, Ronald S.
   Macri, Robert A.
   Tajima, Shigeyuki
   Howell, Calvin R.
TI Neutron stimulated emission computed tomography: Background corrections
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
   INTERACTIONS WITH MATERIALS AND ATOMS
LA English
DT Article
DE neutrons; gamma-ray spectroscopy; background corrections; image quality;
   biomedical imaging
ID BODY IRON STORES; TRACE-ELEMENTS; HUMAN PROSTATE; BREAST-TISSUE; CANCER
   RISK; ZINC; CADMIUM; CARCINOMA; SELENIUM; COLON
AB Neutron stimulated emission computed tomography (NSECT) is an imaging technique that provides an in-vivo tomographic spectroscopic image of the distribution of elements in a body. To achieve this, a neutron beam illuminates the body. Nuclei in the body along the path of the beam are stimulated by inelastic scattering of the neutrons in the beam and emit characteristic gamma photons whose unique energy identifies the element. The emitted gammas are collected in a spectrometer and form a projection intensity for each spectral line at the projection orientation of the neutron beam. Rotating and translating either the body or the beam will allow a tomographic projection set to be acquired. Images are reconstructed to represent the spatial distribution of elements in the body. Critical to this process is the appropriate removal of background gamma events from the spectrum. Here we demonstrate the equivalence of two background correction techniques and discuss the appropriate application of each. (c) 2006 Elsevier B.V. All rights reserved.
C1 Duke Univ, Dept Biomed Engn, Durham, NC 27708 USA.
   Duke Univ, Dept Radiol, Duke Adv Imaging Labs, Durham, NC 27708 USA.
   Duke Univ, Med Phys Grad Program, Durham, NC 27708 USA.
   Duke Univ, Dept Phys, Durham, NC 27708 USA.
   Duke Univ, Triangle Univ Nucl Lab, Durham, NC 27708 USA.
   N Carolina Agr & Tech State Univ, Greensboro, NC USA.
   Univ Virginia, Dept Phys, Charlottesville, VA 22901 USA.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Sharma, AC (reprint author), DAILabs, 2424 Erwin Rd,Suite 302, Durham, NC 27705 USA.
EM anc4@duke.edu
RI Kapadia, Anuj/C-6538-2016; 
OI Kapadia, Anuj/0000-0003-2755-4495; Tourassi,
   Georgia/0000-0002-9418-9638; Lo, Joseph/0000-0002-9540-5072
NR 28
TC 10
Z9 10
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-583X
J9 NUCL INSTRUM METH B
JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms
PD JAN
PY 2007
VL 254
IS 2
BP 329
EP 336
DI 10.1016/j.nimb.2006.11.098
PG 8
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Atomic, Molecular & Chemical; Physics, Nuclear
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 140OA
UT WOS:000244513800023
ER

PT J
AU Jaffe, D
AF Jaffe, David
TI Comparison of inclusive particle production in 14.6 GeV/c proton-nucleus
   collisions with simulation (vol 246, pg 309, 2006)
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
   INTERACTIONS WITH MATERIALS AND ATOMS
LA English
DT Correction
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Jaffe, D (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM djaffe@bnl.gov
NR 6
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-583X
J9 NUCL INSTRUM METH B
JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms
PD JAN
PY 2007
VL 254
IS 2
BP 340
EP 340
DI 10.1016/j.nimb.2006.11.074
PG 1
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Atomic, Molecular & Chemical; Physics, Nuclear
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 140OA
UT WOS:000244513800025
ER

PT J
AU VanBrocklin, HF
   Hanrahan, SM
   Enas, JD
   Nandanan, E
   O'Neil, JP
AF VanBrocklin, Henry F.
   Hanrahan, Stephen M.
   Enas, Joel D.
   Nandanan, Erathodiyil
   O'Neil, James P.
TI Mitochondrial avid radioprobes. Preparation and evaluation of 7
   '(Z)-[I-125]iodorotenone and 7 '(Z)-[I-125]iodorotenol
SO NUCLEAR MEDICINE AND BIOLOGY
LA English
DT Article
DE iodine-125; rotenone; mitochondria; Complex I
ID COMPLEX-I ACTIVITY; ELECTRON-TRANSPORT CHAIN; MYOCARDIAL FLOW TRACER;
   DIHYDROROTENONE BINDING; TECHNETIUM-TETROFOSMIN; KINETIC-ANALYSIS;
   TC-99M-SESTAMIBI; ACCUMULATION; DYSFUNCTION; ROTENOIDS
AB The loss of mitochondrial function has been implicated in a number of maladies such as Huntington's disease, Parkinson's disease (PD), cancer and cardiovascular disease. The objective of this research was to develop a radiolabeled mitochondrial probe. Two tracers, 7'-Z-iodorotenol and 7'-Z-iodorotenone, analogs of rotenone a natural product that inhibits Complex I of the mitochondrial electron transport chain, have been labeled with iodine-125 in 45-85% yield in a single step from the corresponding tributylstannyl precursor. In vivo distribution in adult male Sprague-Dawley rats for both compounds showed high accumulation in the heart (1.7-3.7 %ID/g at 1 h), a tissue with high mitochondrial content. Z-Iodorotenol did not washout of most tissues between 1 and 2 h postinjection, whereas Z-iodorotenone showed moderate washout (7-26%) over the same period. By 24 h, there was significant loss of both compounds from most tissues including the heart. Heart-to-blood, -lung and -liver ratios for Z-iodorotenone of 28.9, 10.7 and 2.4, respectively, were two- to fourfold higher than the Z-iodorotenol ratios. Compared to the current clinical perfusion tracers, Tc-99m-sestamibi and (99)mTc-tetrofosirim, Z-iodorotenone demonstrates similar I h heart accumulation and significantly higher heart-to-lung ratio (P <.001). Z-Iodorotenone heart-to-liver ratio is equivalent to Tc-99m-sestamibi. 7'-Z-Iodorotenone possesses distribution characteristics of an improved tracer for SPECT perfusion studies. (c) 2007 Elsevier Inc. All rights reserved.
C1 Lawrence Berkeley Natl Lab, Dept Funct Imaging, Berkeley, CA 94720 USA.
RP VanBrocklin, HF (reprint author), Lawrence Berkeley Natl Lab, Dept Funct Imaging, Berkeley, CA 94720 USA.
EM hfvanbrocklin@lbl.gov
RI Erathodiyil, Nandanan/A-8333-2010
FU NHLBI NIH HHS [P01 HL025840-200008, HL25840]; NIA NIH HHS [P30 AG010129,
   AG10129]
NR 33
TC 11
Z9 11
U1 0
U2 5
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0969-8051
J9 NUCL MED BIOL
JI Nucl. Med. Biol.
PD JAN
PY 2007
VL 34
IS 1
BP 109
EP 116
DI 10.1016/j.nucmedbio.2006.10.005
PG 8
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA 127TW
UT WOS:000243610200012
PM 17210467
ER

PT J
AU Hatta, Y
AF Hatta, Yoshitaka
TI CGC formalism with two sources
SO NUCLEAR PHYSICS A
LA English
DT Article
ID COLOR GLASS CONDENSATE; GLUON DISTRIBUTION-FUNCTIONS; NUCLEUS-NUCLEUS
   COLLISIONS; HIGH-ENERGY SCATTERING; SMALL-X PHYSICS; QCD EVOLUTION;
   EQUATION; UNITARITY; EXPANSION; POMERON
AB In this work we extend the JIMWLK formalism to the two-source problem. The S-matrix for the forward scattering can be written in a double functional integral representation which involves the usual functional integral for the gluon field and the spin path integral for the external color sources. Modifications needed in the light-cone gauge are discussed. Using our source term we compute the produced gluon field and discuss the duality of the high energy evolution kernel in the pA collision. (c) 2006 Elsevier B.V. All rights reserved.
C1 Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA.
RP Hatta, Y (reprint author), Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA.
EM hatta@bnl.gov
NR 53
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
EI 1873-1554
J9 NUCL PHYS A
JI Nucl. Phys. A
PD JAN 1
PY 2007
VL 781
IS 1-2
BP 104
EP 121
DI 10.1016/j.nuclphysa.2006.10.076
PG 18
WC Physics, Nuclear
SC Physics
GA 131VM
UT WOS:000243898900006
ER

PT J
AU Armesto, N
   McLerran, L
   Pajares, C
AF Armesto, Nestor
   McLerran, Larry
   Pajares, Carlos
TI Long range forward-backward correlations and the color glass condensate
SO NUCLEAR PHYSICS A
LA English
DT Article
ID GLUON DISTRIBUTION-FUNCTIONS; WEIZSACKER-WILLIAMS FIELD;
   TRANSVERSE-MOMENTUM; NUCLEAR COLLISIONS; SMALL-X; RENORMALIZATION-GROUP;
   SATURATION MOMENTUM; ENERGY-DEPENDENCE; EVOLUTION; DENSITY
AB We discuss forward-backward correlations in the multiplicity of produced particles in heavy ion collisions. We find the color glass condensate generates distinctive predictions for the long range component of this correlation. In particular, we predict the growth of the long range correlation with the centrality of the collision. We argue that the correlation for baryons is less strong than that for mesons. (c) 2006 Elsevier B.V. All rights reserved.
C1 Nucl Theory Grp, Upton, NY 11793 USA.
   RIKEN, Brookhaven Res Ctr, Brookhaven Natl Lab, Upton, NY 11793 USA.
   Univ Santiago de Compostela, Dept Fis Particulas, Santiago De Compostela 15782, Spain.
   Univ Santiago de Compostela, IGFAE, Santiago De Compostela 15782, Spain.
RP McLerran, L (reprint author), Nucl Theory Grp, Upton, NY 11793 USA.
EM mclerran@mac.com
RI Armesto, Nestor/C-4341-2017
OI Armesto, Nestor/0000-0003-0940-0783
NR 45
TC 62
Z9 63
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 JAN 1
PY 2007
VL 781
IS 1-2
BP 201
EP 208
DI 10.1016/j.nuclphysa.2006.10.074
PG 8
WC Physics, Nuclear
SC Physics
GA 131VM
UT WOS:000243898900009
ER

PT J
AU Arnold, R
   Augier, C
   Baker, J
   Barabash, AS
   Bongrand, M
   Broudin, G
   Brudanin, V
   Caffrey, AJ
   Egorov, V
   Etienvre, AI
   Fatemi-Ghomi, N
   Hubert, F
   Hubert, P
   Jerie, J
   Jollet, C
   Jullian, S
   King, S
   Kochetov, O
   Konovalov, SI
   Kovalenko, V
   Lalanne, D
   Lamhamdi, T
   Leccia, F
   Lemiere, Y
   Longuemare, C
   Lutter, G
   Marquete, C
   Mauger, F
   Nachab, A
   Ohsumi, H
   Perrot, F
   Piquemal, F
   Reyss, JL
   Ricol, JS
   Saakyan, R
   Sarazin, X
   Simard, L
   Simkovic, F
   Shitov, Y
   Smolnikov, A
   Soldner-Rembold, S
   Stekl, I
   Suhonen, J
   Sutton, CS
   Szklarz, G
   Thomas, J
   Timkin, V
   Tretyak, V
   Umatov, V
   Vala, L
   Vanyushin, I
   Vasiliev, V
   Vorobel, V
   Vylov, T
AF Arnold, R.
   Augier, C.
   Baker, J.
   Barabash, A. S.
   Bongrand, M.
   Broudin, G.
   Brudanin, V.
   Caffrey, A. J.
   Egorov, V.
   Etienvre, A. I.
   Fatemi-Ghomi, N.
   Hubert, F.
   Hubert, Ph.
   Jerie, J.
   Jollet, C.
   Jullian, S.
   King, S.
   Kochetov, O.
   Konovalov, S. I.
   Kovalenko, V.
   Lalanne, D.
   Lamhamdi, T.
   Leccia, F.
   Lemiere, Y.
   Longuemare, C.
   Lutter, G.
   Marquete, Ch.
   Mauger, F.
   Nachab, A.
   Ohsumi, H.
   Perrot, F.
   Piquemal, F.
   Reyss, J. L.
   Ricol, J. S.
   Saakyan, R.
   Sarazin, X.
   Simard, L.
   Simkovic, F.
   Shitov, Yu.
   Smolnikov, A.
   Soldner-Rembold, S.
   Stekl, I.
   Suhonen, J.
   Sutton, C. S.
   Szklarz, G.
   Thomas, J.
   Timkin, V.
   Tretyak, V.
   Umatov, V.
   Vala, L.
   Vanyushin, I.
   Vasiliev, V.
   Vorobel, V.
   Vylov, Ts.
TI Measurement of double beta decay of Mo-100 to excited states in the NEMO
   3 experiment
SO NUCLEAR PHYSICS A
LA English
DT Article
DE double beta decays neutrino; Mo-100; excited state
ID NUCLEAR-STRUCTURE; SUPER-KAMIOKANDE; NEUTRINO MASS; 2-NU-BETA-BETA
   DECAY; FINAL-STATES; DETECTOR; RU-100; TRANSITIONS; PERFORMANCE;
   DOMINANCE
AB The double beta decay of Mo-100 to the 0(1)(+) and 2(1)(+) excited states of Ru-100 is studied using the NEMO 3 data. After the analysis of 8024 h of data the half-life for the two-neutrino double beta decay of Mo-100 to the excited 0(1)(+) state is measured to be T-1/2((2v))=[5.7(-0.9)(+1.3)(stat.) +/- 0.8(syst.)] x 10(20) y. The signal -to-background ratio is equal to 3. Information about energy and angular distributions of emitted electrons is also obtained. No evidence for neutrinoless double beta decay to the excited 0(1)(+) state has been found. The corresponding half-life limit is T-1/2((Ov)) (0(+)-> 0(1)(+)) > 8.9 X 10(22) y (at 90% C.L.). The search for the double, beta decay to the 2(1)(+) excited state has allowed the determination of limits on the half-life for the two neutrino mode T-1/2((2v)) (0(+)-> 2(1)(+)) > 1.1 x 10(21) y (at 90% C.L.) and for the neutrinoless mode T-1/2((OV)) (0(+)-> 2(1)(+)) > 1.6 x 10(23) y (at 90% C.L.). (c) 2006 Elsevier B.V. All rights reserved.
C1 CNRS, IPHC, IN2P3, F-67037 Strasbourg, France.
   CNRS, IN2P3, LAL, F-91405 Orsay, France.
   Univ Paris 11, F-91405 Orsay, France.
   INEEL, Idaho Falls, ID 83415 USA.
   Inst Theoret & Expt Phys, Moscow 117259, Russia.
   CNRS, CENBG, IN2P3, F-33170 Gradignan, France.
   Univ Bordeaux 1, F-33170 Gradignan, France.
   Joint Inst Nucl Res, Dubna 141980, Russia.
   Univ Manchester, Manchester M13 9PL, Lancs, England.
   Czech Tech Univ, IEAP, CZ-12800 Prague, Czech Republic.
   UCL, London WC1E 6BT, England.
   USMBA, Fes, Morocco.
   Univ Caen, F-14032 Caen, France.
   CNRS, IN2P3, LPC, F-14032 Caen, France.
   Saga Univ, Saga 8408502, Japan.
   CENS, LSCE, F-91190 Gif Sur Yvette, France.
   Comenius Univ, FMFI, SK-84248 Bratislava, Slovakia.
   Univ Jyvaskyla, Jyvaskyla 40351, Finland.
   Mt Holyoke Coll, S Hadley, MA 01075 USA.
   Charles Univ Prague, Prague, Czech Republic.
RP Arnold, R (reprint author), CNRS, IPHC, IN2P3, F-67037 Strasbourg, France.
EM roger.arnold@ires.in2p3.fr
RI Caffrey, Augustine/C-2005-2009; Shitov, Yuri/J-2318-2012; Vala,
   Ladislav/L-4938-2016; Barabash, Alexander/S-8851-2016
NR 60
TC 62
Z9 62
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 JAN 1
PY 2007
VL 781
IS 1-2
BP 209
EP 226
DI 10.1016/j.nuclphysa.2006.09.021
PG 18
WC Physics, Nuclear
SC Physics
GA 131VM
UT WOS:000243898900010
ER

PT J
AU Ligeti, Z
AF Ligeti, Zoltan
TI Annihilation in charmless nonleptonic B decays
SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS
LA English
DT Proceedings Paper
CT 1st Workshop on Theory, Phenomenology and Experiment in Heavy Flavour
   Physics
CY MAY 29-31, 2006
CL Anacapri, ITALY
ID QCD FACTORIZATION; MESON DECAYS; OPERATORS; PENGUINS
AB We show that the leading contributions to annihilation amplitudes in nonleptonic B -> M1M2 decays (where M-1,M-2 are charmless non-isosinglet mesons) of order alpha(s)(m(b)) Lambda/m(b) are real and are determined by distribution functions that already occur in the lowest order factorization theorem [1]. A complex nonperturbative parameter from annihilation first appears at O[alpha(2)(s)(root Lambda m(b)) Lambda/m(b)]. "Chirally enhanced" contributions are also factorizable and real at lowest order. Thus, incalculable strong phases are suppressed in annihilation amplitudes, unless the alpha(s)(root Lambda m(b)) expansion breaks down. Modeling the distribution functions, we find that (11 +/- 9)% and (15 +/- 11)% of the absolute values of the measured B-0 -> K-pi(+) and B- -> (K-K0) penguin amplitudes come from annihilation. This is consistent with the expected size of power corrections.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Ligeti, Z (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
NR 35
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5632
J9 NUCL PHYS B-PROC SUP
JI Nucl. Phys. B-Proc. Suppl.
PD JAN
PY 2007
VL 163
BP 101
EP 106
DI 10.1016/j.nuclphysbps.2006.09.015
PG 6
WC Physics, Particles & Fields
SC Physics
GA 130LL
UT WOS:000243801000017
ER

PT J
AU Masiero, A
   Ferroni, F
   Browder, TE
   Ciuchini, M
   Playfer, S
   Soni, A
AF Masiero, Antonio
   Ferroni, Fernando
   Browder, Tom E.
   Ciuchini, Marco
   Playfer, Steve
   Soni, Amarjit
TI Future prospects for heavy flavor physics: Round table
SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS
LA English
DT Proceedings Paper
CT 1st Workshop on Theory, Phenomenology and Experiment in Heavy Flavour
   Physics
CY MAY 29-31, 2006
CL Anacapri, ITALY
C1 Univ Padua, I-35131 Padua, Italy.
   Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
   Univ Rome, Dipartimento Fis, I-00185 Rome, Italy.
   Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy.
   Univ Hawaii Manoa, Honolulu, HI 96822 USA.
   Univ Rome, I-00146 Rome, Italy.
   Ist Nazl Fis Nucl, I-00146 Rome, Italy.
   Univ Edinburgh, Sch Phys, Edinburgh EH 9 3JZ, Midlothian, Scotland.
   Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Masiero, A (reprint author), Univ Padua, Via Marzolo 8, I-35131 Padua, Italy.
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 0920-5632
J9 NUCL PHYS B-PROC SUP
JI Nucl. Phys. B-Proc. Suppl.
PD JAN
PY 2007
VL 163
BP 198
EP 202
DI 10.1016/j.nuclphysbps.2006.10.006
PG 5
WC Physics, Particles & Fields
SC Physics
GA 130LL
UT WOS:000243801000032
ER

PT B
AU Maerli, MB
   Lodgaard, S
AF Maerli, Morten Bremer
   Lodgaard, Sverre
BA Lodgaard, S
BF Lodgaard, S
BE Maerli, MB
TI Nuclear Proliferation and International Security Introduction
SO NUCLEAR PROLIFERATION AND INTERNATIONAL SECURITY
SE Routledge Global Security Studies
LA English
DT Editorial Material; Book Chapter
C1 [Lodgaard, Sverre] UNIDIR, Geneva, Switzerland.
   [Lodgaard, Sverre] Int Peace Res Inst, Oslo, Norway.
RP Maerli, MB (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
EM mbm@nupi.no; sl@nupi.no; sl@nupi.no; mbm@nupi.no
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE
PI NEW YORK
PA 29 W 35TH ST, NEW YORK, NY 10001 USA
BN 978-0-203-08903-3
J9 ROUT GLOB SECUR STUD
PY 2007
BP 1
EP 5
PG 5
WC International Relations
SC International Relations
GA BMX62
UT WOS:000273835500003
ER

PT B
AU Miller, M
   Scheinman, L
AF Miller, Marvin
   Scheinman, Lawrence
BA Lodgaard, S
BF Lodgaard, S
BE Maerli, MB
TI Israel and a Nuclear Weapon-Free Zone in the Middle East
SO NUCLEAR PROLIFERATION AND INTERNATIONAL SECURITY
SE Routledge Global Security Studies
LA English
DT Article; Book Chapter
C1 [Miller, Marvin] MIT, Dept Nucl Engn, Cambridge, MA 02139 USA.
   [Miller, Marvin] US DOE, Washington, DC 20585 USA.
   [Miller, Marvin; Scheinman, Lawrence] IAEA, Vienna, Austria.
   [Scheinman, Lawrence] Monterey Inst Int Studies, Ctr Nonproliferat Studies, Monterey, CA USA.
   [Scheinman, Lawrence] Cornell Univ, Ithaca, NY 14853 USA.
RP Miller, M (reprint author), MIT, Dept Nucl Engn, Cambridge, MA 02139 USA.
EM marvmill1@verizon.net; lscheinman@stimson.org
NR 0
TC 1
Z9 1
U1 0
U2 0
PU ROUTLEDGE
PI NEW YORK
PA 29 W 35TH ST, NEW YORK, NY 10001 USA
BN 978-0-203-08903-3
J9 ROUT GLOB SECUR STUD
PY 2007
BP 137
EP 151
PG 15
WC International Relations
SC International Relations
GA BMX62
UT WOS:000273835500010
ER

PT J
AU Jiang, JS
   Sheng, J
   Carrasco, N
   Huang, Z
AF Jiang, Jiansheng
   Sheng, Jia
   Carrasco, Nicolas
   Huang, Zhen
TI Selenium derivatization of nucleic acids for crystallography
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID X-RAY CRYSTALLOGRAPHY; MULTIWAVELENGTH ANOMALOUS DIFFRACTION; DNA
   OCTAMER D(GTGTACAC); CRYSTAL-STRUCTURE; STRUCTURAL BASIS; SYNCHROTRON
   RADIATION; MOLECULAR-STRUCTURE; MAD; OLIGONUCLEOTIDES; RNA
AB The high-resolution structure of the DNA (5'-GTGTACA-C-3') with the selenium derivatization at the 2'-position of T2 was determined via MAD and SAD phasing. The selenium-derivatized structure (1.28 angstrom resolution) with the 2'-Se modification in the minor groove is isomorphorous to the native structure (2.0 angstrom). To directly compare with the conventional bromine derivatization, we incorporated bromine into the 5-postion of T4, determined the bromine-derivatized DNA structure at 1.5 angstrom resolution, and found that the local backbone torsion angles and solvent hydration patterns were altered in the structure with the Br incorporation in the major groove. Furthermore, while the native and Br-derivatized DNAs needed over a week to form reasonable-size crystals, we observed that the Se-derivatized DNAs grew crystals overnight with high-diffraction quality, suggesting that the Se derivatization facilitated the crystal formation. In addition, the Se-derivatized DNA sequences crystallized under a broader range of buffer conditions, and generally had a faster crystal growth rate. Our experimental results indicate that the selenium derivatization of DNAs may facilitate the determination of nucleic acid X-ray crystal structures in phasing and high-quality crystal growth. In addition, our results suggest that the Se derivatization can be an alternative to the conventional Br derivatization.
C1 Georgia State Univ, Dept Chem, Atlanta, GA 30302 USA.
   Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
RP Huang, Z (reprint author), Georgia State Univ, Dept Chem, POB 4010, Atlanta, GA 30302 USA.
EM Huang@gsu.edu
NR 42
TC 39
Z9 39
U1 0
U2 6
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD JAN
PY 2007
VL 35
IS 2
BP 477
EP 485
DI 10.1093/nar/gkl1070
PG 9
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 133DY
UT WOS:000243993600019
PM 17169989
ER

PT J
AU Krause, L
   McHardy, AC
   Nattkemper, TW
   Puhler, A
   Stoye, J
   Meyer, F
AF Krause, Lutz
   McHardy, Alice C.
   Nattkemper, Tim W.
   Puehler, Alfred
   Stoye, Jens
   Meyer, Folker
TI GISMO - gene identification using a support vector machine for ORF
   classification
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID SELF-TRAINING METHOD; CODON USAGE; CHLAMYDIA-TRACHOMATIS; THIAMIN
   BIOSYNTHESIS; COMPARATIVE GENOMICS; MUTATIONAL BIASES; MICROBIAL
   GENOMES; MARKOV-MODELS; SEQUENCE; BACTERIAL
AB We present the novel prokaryotic gene finder GISMO, which combines searches for protein family domains with composition-based classification based on a support vector machine. GISMO is highly accurate; exhibiting high sensitivity and specificity in gene identification. We found that it performs well for complete prokaryotic chromosomes, irrespective of their GC content, and also for plasmids as short as 10 kb, short genes and for genes with atypical sequence composition. Using GISMO, we found several thousand new predictions for the published genomes that are supported by extrinsic evidence, which strongly suggest that these are very likely biologically active genes. The source code for GISMO is freely available under the GPL license.
C1 Univ Bielefeld, Ctr Biotechnol, D-33594 Bielefeld, Germany.
   IBM Corp, Thomas J Watson Res Ctr, Bioinformat & Pattern Discovery Grp, Yorktown Hts, NY 10598 USA.
   Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA.
RP Krause, L (reprint author), Univ Bielefeld, Ctr Biotechnol, D-33594 Bielefeld, Germany.
EM lutz.krause@cebitec.uni-bielefeld.de
RI Stoye, Jens/A-2709-2012; Krause, Lutz/G-6283-2013; Krause,
   Lutz/M-7305-2015; Nattkemper, Tim/F-3332-2017; 
OI Stoye, Jens/0000-0002-4656-7155; Krause, Lutz/0000-0003-3806-0845;
   Krause, Lutz/0000-0003-3806-0845; Nattkemper, Tim/0000-0002-7986-1158;
   Meyer, Folker/0000-0003-1112-2284
NR 46
TC 33
Z9 34
U1 0
U2 5
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 JAN
PY 2007
VL 35
IS 2
BP 540
EP 549
DI 10.1093/nar/gkl1083
PG 10
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 133DY
UT WOS:000243993600025
PM 17175534
ER

PT J
AU D'Souza, M
   Glass, EM
   Syed, MH
   Zhang, Y
   Rodriguez, A
   Maltsev, N
   Galperin, MY
AF D'Souza, Mark
   Glass, Elizabeth M.
   Syed, Mustafa H.
   Zhang, Yi
   Rodriguez, Alexis
   Maltsev, Natalia
   Galperin, Michael Y.
TI Sentra: a database of signal transduction proteins for comparative
   genome analysis
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID INCREASED COVERAGE; BACTERIA; DOMAINS; PROKARYOTES; DIVERSITY; PATHWAYS;
   KINASES; SYSTEM; LIGHT
AB Sentra (http://compbio.mcs.anl.gov/sentra), a database of signal transduction proteins encoded in completely sequenced prokaryotic genomes, has been updated to reflect recent advances in understanding signal transduction events on a whole-genome scale. Sentra consists of two principal components, a manually curated list of signal transduction proteins in 202 completely sequenced prokaryotic genomes and an automatically generated listing of predicted signaling proteins in 235 sequenced genomes that are awaiting manual curation. In addition to two-component histidine kinases and response regulators, the database now lists manually curated Ser/Thr/Tyr protein kinases and protein phosphatases, as well as adenylate and diguanylate cyclases and c-di-GMP phosphodiesterases, as defined in several recent reviews. All entries in Sentra are extensively annotated with relevant information from public databases (e.g. UniProt, KEGG, PDB and NCBI). Sentra's infrastructure was redesigned to support interactive cross-genome comparisons of signal transduction capabilities of prokaryotic organisms from a taxonomic and phenotypic perspective and in the framework of signal transduction pathways from KEGG. Sentra leverages the PUMA2 system to support interactive analysis and annotation of signal transduction proteins by the users.
C1 Argonne Natl Lab, Div Math & Comp Sci, Computat Biol Grp, Argonne, IL 60439 USA.
   Univ Chicago, Comp Inst, Chicago, IL 60637 USA.
   Natl Lib Med, Natl Ctr Biotechnol Informat, NIH, Bethesda, MD 20894 USA.
RP D'Souza, M (reprint author), Argonne Natl Lab, Div Math & Comp Sci, Computat Biol Grp, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM dsouza@mcs.anl.gov; galperin@ncbi.nlm.nih.gov
RI Syed, Mustafa/A-5252-2011; Galperin, Michael/B-5859-2013
OI Galperin, Michael/0000-0002-2265-5572
FU Intramural NIH HHS [Z99 LM999999]; NIAID NIH HHS [1-U54-AI-057153, U54
   AI057153]; PHS HHS [266200400042C]
NR 25
TC 17
Z9 18
U1 1
U2 4
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD JAN
PY 2007
VL 35
SI SI
BP D271
EP D273
DI 10.1093/nar/gkl949
PG 3
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 126EI
UT WOS:000243494600056
PM 17135204
ER

PT J
AU Kazakov, AE
   Cipriano, MJ
   Novichkov, PS
   Minovitsky, S
   Vinogradov, DV
   Arkin, A
   Mironov, AA
   Gelfand, MS
   Dubchak, I
AF Kazakov, Alexei E.
   Cipriano, Michael J.
   Novichkov, Pavel S.
   Minovitsky, Simon
   Vinogradov, Dmitry V.
   Arkin, Adam
   Mironov, Andrey A.
   Gelfand, Mikhail S.
   Dubchak, Inna
TI RegTransBase - a database of regulatory sequences and interactions in a
   wide range of prokaryotic genomes
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID PREDICTION; PROTEINS; SYSTEM; SITE
AB RegTransBase is a manually curated database of regulatory interactions in prokaryotes that captures the knowledge in public scientific literature using a controlled vocabulary. Although several databases describing interactions between regulatory proteins and their binding sites are already being maintained, they either focus mostly on the model organisms Escherichia coli and Bacillus subtilis or are entirely computationally derived. RegTransBase describes a large number of regulatory interactions reported in many organisms and contains the following types of experimental data: the activation or repression of transcription by an identified direct regulator, determining the transcriptional regulatory function of a protein (or RNA) directly binding to DNA (RNA), mapping or prediction of a binding site for a regulatory protein and characterization of regulatory mutations. Currently, RegTransBase content is derived from about 3000 relevant articles describing over 7000 experiments in relation to 128 microbes. It contains data on the regulation of about 7500 genes and evidence for 6500 interactions with 650 regulators. RegTransBase also contains manually created position weight matrices (PWM) that can be used to identify candidate regulatory sites in over 60 species. RegTransBase is available at http://regtransbase.lbl.gov.
C1 RAS, Inst Problems Informat Transmiss, Moscow 127994, Russia.
   Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Natl Lib Med, Natl Ctr Biotechnol Informat, NIH, Bethesda, MD 20894 USA.
   Univ Calif Berkeley, Dept Bioengn, Albany, CA 94710 USA.
   Virtual Inst Microbial Stress & Survival, Albany, CA 94710 USA.
   Moscow MV Lomonosov State Univ, Fac Bioengn & Bioinformat, Moscow 119992, Russia.
   State Res Ctr GosNIIGenet, Moscow 117545, Russia.
   Joint Genome Inst, Dept Energy, Walnut Creek, CA 94598 USA.
RP Gelfand, MS (reprint author), RAS, Inst Problems Informat Transmiss, Bolshoi Karetny Pereulok 19, Moscow 127994, Russia.
EM gelfand@iitp.ru; ildubchak@Ibl.gov
RI Arkin, Adam/A-6751-2008; Mironov, Andrey/C-8024-2012; Gelfand,
   Mikhail/F-3425-2012
OI Arkin, Adam/0000-0002-4999-2931; 
NR 19
TC 62
Z9 62
U1 1
U2 3
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 JAN
PY 2007
VL 35
SI SI
BP D407
EP D412
DI 10.1093/nar/gkl865
PG 6
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 126EI
UT WOS:000243494600084
PM 17142223
ER

PT J
AU McNeil, LK
   Reich, C
   Aziz, RK
   Bartels, D
   Cohoon, M
   Disz, T
   Edwards, RA
   Gerdes, S
   Hwang, K
   Kubal, M
   Margaryan, GR
   Meyer, F
   Mihalo, W
   Olsen, GJ
   Olson, R
   Osterman, A
   Paarmann, D
   Paczian, T
   Parrello, B
   Pusch, GD
   Rodionov, DA
   Shi, XH
   Vassieva, O
   Vonstein, V
   Zagnitko, O
   Xia, FF
   Zinner, J
   Overbeek, R
   Stevens, R
AF McNeil, Leslie Klis
   Reich, Claudia
   Aziz, Ramy K.
   Bartels, Daniela
   Cohoon, Matthew
   Disz, Terry
   Edwards, Robert A.
   Gerdes, Svetlana
   Hwang, Kaitlyn
   Kubal, Michael
   Margaryan, Gohar Rem
   Meyer, Folker
   Mihalo, William
   Olsen, Gary J.
   Olson, Robert
   Osterman, Andrei
   Paarmann, Daniel
   Paczian, Tobias
   Parrello, Bruce
   Pusch, Gordon D.
   Rodionov, Dmitry A.
   Shi, Xinghua
   Vassieva, Olga
   Vonstein, Veronika
   Zagnitko, Olga
   Xia, Fangfang
   Zinner, Jenifer
   Overbeek, Ross
   Stevens, Rick
TI The National Microbial Pathogen Database Resource (NMPDR): a genomics
   platform based on subsystem annotation
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID PROTEIN; GENES; INFORMATION; ALIGNMENT
AB The National Microbial Pathogen Data Resource (NMPDR) (http://www.nmpdr.org) is a National Institute of Allergy and Infections Disease (NIAID)-funded Bioinformatics Resource Center that supports research in selected Category B pathogens. NMPDR contains the complete genomes of similar to 50 strains of pathogenic bacteria that are the focus of our curators, as well as > 400 other genomes that provide a broad context for comparative analysis across the three phylogenetic Domains. NMPDR integrates complete, public genomes with expertly curated biological subsystems to provide the most consistent genome annotations. Subsystems are sets of functional roles related by a biologically meaningful organizing principle, which are built over large collections of genomes; they provide researchers with consistent functional assignments in a biologically structured context. Investigators can browse subsystems and reactions to develop accurate reconstructions of the metabolic networks of any sequenced organism. NMPDR provides a comprehensive bioinformatics platform, with tools and viewers for genome analysis. Results of precomputed gene clustering analyses can be retrieved in tabular or graphic format with one-click tools. NMPDR tools include Signature Genes, which finds the set of genes in common or that differentiates two groups of organisms. Essentiality data collated from genome-wide studies have been curated. Drug target identification and high-throughput, in silico, compound screening are in development.
C1 Univ Illinois, Natl Ctr Supercomp Applicat, Urbana, IL 61801 USA.
   Univ Illinois, Dept Microbiol, Urbana, IL 61801 USA.
   Cairo Univ, Coll Pharm, Dept Microbiol & Immunol, Cairo, Egypt.
   Univ Chicago, Comp Inst, Chicago, IL 60637 USA.
   Burnham Inst, La Jolla, CA 92037 USA.
   San Diego State Univ, San Diego, CA 92182 USA.
   Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA.
   Univ Dundee, Biomed Res Ctr, Dundee DD1 4HN, Scotland.
RP McNeil, LK (reprint author), Univ Illinois, Natl Ctr Supercomp Applicat, Urbana, IL 61801 USA.
EM lkmcneil@ncsa.uiuc.edu
RI Aziz, Ramy/B-2918-2009; 
OI Aziz, Ramy/0000-0002-4448-7100; Rodionov, Dmitry/0000-0002-0939-390X;
   Meyer, Folker/0000-0003-1112-2284
FU PHS HHS [HHSN266200400042C]
NR 22
TC 65
Z9 69
U1 0
U2 6
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD JAN
PY 2007
VL 35
SI SI
BP D347
EP D353
DI 10.1093/nar/gkl947
PG 7
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 126EI
UT WOS:000243494600072
PM 17145713
ER

PT J
AU Ulrich, LE
   Zhulin, IB
AF Ulrich, Luke E.
   Zhulin, Igor B.
TI MiST: a microbial signal transduction database
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID TRANSCRIPTIONAL REGULATION; TRANSMEMBRANE RECEPTORS; BACILLUS-SUBTILIS;
   CRYSTAL-STRUCTURE; DOMAIN COMMON; PROTEINS; MODULE; PROKARYOTES;
   EUKARYOTES; PREDICTION
AB Signal transduction pathways control most cellular activities in living cells ranging from regulation of gene expression to fine-tuning enzymatic activity and controlling motile behavior in response to extracellular and intracellular signals. Because of their extreme sequence variability and extensive domain shuffling, signal transduction proteins are difficult to identify, and their current annotation in most leading databases is often incomplete or erroneous. To overcome this problem, we have developed the microbial signal transduction (MiST) database (http://genomics.ornl.gov/mist), a comprehensive library of the signal transduction proteins from completely sequenced bacterial and archaeal genomes. By searching for domain profiles that implicate a particular protein as participating in signal transduction, we have systematically identified 69 270 two- and one-component proteins in 365 bacterial and archaeal genomes. We have designed a user-friendly website to access and browse the predicted signal transduction proteins within various organisms. Further capabilities include gene/protein sequence retrieval, visualized domain architectures, interactive chromosomal views for exploring gene neighborhood, advanced querying options and cross-species comparison. Newly available, complete genomes are loaded into the database each month. MiST is the only comprehensive and up-to-date electronic catalog of the signaling machinery in microbial genomes.
C1 Univ Tennessee, Oak Ridge Natl Lab, Joint Inst Computat Sci, Oak Ridge, TN 37831 USA.
   Univ Tennessee, Oak Ridge Natl Lab, Grad Sch Genome Sci & Technol, Oak Ridge, TN 37831 USA.
   Georgia Inst Technol, Ctr Bioinformat & Computat Biol, Sch Biol, Atlanta, GA 30332 USA.
RP Ulrich, LE (reprint author), Univ Tennessee, Oak Ridge Natl Lab, Joint Inst Computat Sci, Oak Ridge, TN 37831 USA.
EM ulrichle@ornl.gov
RI Zhulin, Igor/A-2308-2012
OI Zhulin, Igor/0000-0002-6708-5323
FU NIGMS NIH HHS [GM072285, R01 GM072285]
NR 38
TC 75
Z9 76
U1 0
U2 4
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD JAN
PY 2007
VL 35
SI SI
BP D386
EP D390
DI 10.1093/nar/gkl932
PG 5
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 126EI
UT WOS:000243494600080
PM 17135192
ER

PT J
AU Visel, A
   Minovitsky, S
   Dubchak, I
   Pennacchio, LA
AF Visel, Axel
   Minovitsky, Simon
   Dubchak, Inna
   Pennacchio, Len A.
TI VISTA Enhancer Browser - a database of tissue-specific human enhancers
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID HUMAN GENOME; REGULATORY ELEMENTS; SEQUENCE; GENE; EXPRESSION
AB Despite the known existence of distant-acting cis-regulatory elements in the human genome, only a small fraction of these elements has been identified and experimentally characterized in vivo. This paucity of enhancer collections with defined activities has thus hindered computational approaches for the genome-wide prediction of enhancers and their functions. To fill this void, we utilize comparative genome analysis to identify candidate enhancer elements in the human genome coupled with the experimental determination of their in vivo enhancer activity in transgenic mice [L. A. Pennacchio et al. (2006) Nature, in press]. These data are available through the VISTA Enhancer Browser (http://enhancer.lbl.gov). This growing database currently contains over 250 experimentally tested DNA fragments, of which more than 100 have been validated as tissue-specific enhancers. For each positive enhancer, we provide digital images of whole-mount embryo staining at embryonic day 11.5 and an anatomical description of the reporter gene expression pattern. Users can retrieve elements near single genes of interest, search for enhancers that target reporter gene expression to a particular tissue, or download entire collections of enhancers with a defined tissue specificity or conservation depth. These experimentally validated training sets are expected to provide a basis for a wide range of downstream computational and functional studies of enhancer function.
C1 Lawrence Berkeley Lab, Genomics Div, Berkeley, CA 94720 USA.
   Joint Genome Inst, US Dept Energy, Walnut Creek, CA 94598 USA.
RP Pennacchio, LA (reprint author), Lawrence Berkeley Lab, Genomics Div, 1 Cyclotron Rd,MS 84-171, Berkeley, CA 94720 USA.
EM LAPennacchio@lbl.gov
RI Visel, Axel/A-9398-2009
OI Visel, Axel/0000-0002-4130-7784
FU NHGRI NIH HHS [HG003988, R01 HG003988]; NHLBI NIH HHS [HL066681, U01
   HL066681]
NR 17
TC 302
Z9 305
U1 2
U2 12
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 JAN
PY 2007
VL 35
BP D88
EP D92
DI 10.1093/nar/gkl822
PG 5
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 126EI
UT WOS:000243494600019
PM 17130149
ER

PT J
AU Zhou, CE
   Smith, J
   Lam, M
   Zemla, A
   Dyer, MD
   Slezak, T
AF Zhou, C. E.
   Smith, J.
   Lam, M.
   Zemla, A.
   Dyer, M. D.
   Slezak, T.
TI MvirDB - a microbial database of protein toxins, virulence factors and
   antibiotic resistance genes for bio-defence applications
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID GENOME
AB Knowledge of toxins, virulence factors and antibiotic resistance genes is essential for bio-defense applications aimed at identifying 'functional' signatures for characterizing emerging or engineered pathogens. Whereas genetic signatures identify a pathogen, functional signatures identify what a pathogen is capable of. To facilitate rapid identification of sequences and characterization of genes for signature discovery, we have collected all publicly available (as of this writing), organized sequences representing known toxins, virulence factors, and antibiotic resistance genes in one convenient database, which we believe will be of use to the bio-defense research community. MvirDB integrates DNA and protein sequence information from Tox-Prot, SCORPION, the PRINTS virulence factors, VFDB, TVFac, Islander, ARGO and a subset of VIDA. Entries in MvirDB are hyperlinked back to their original sources. A blast tool allows the user to blast against all DNA or protein sequences in MvirDB, and a browser tool allows the user to search the database to retrieve virulence factor descriptions, sequences, and classifications, and to download sequences of interest. MvirDB has an automated weekly update mechanism. Each protein sequence in MvirDB is annotated using our fully automated protein annotation system and is linked to that system's browser tool. MvirDB can be accessed at http://mvirdb.llnl.gov/.
C1 Lawrence Livermore Natl Lab, Energy Environm & Biol Div, Computat Directorate, Livermore, CA 94550 USA.
   Virginia Polytech Inst & State Univ, Virginia Bioinformat Inst, Blacksburg, VA 24061 USA.
RP Zhou, CE (reprint author), Lawrence Livermore Natl Lab, Energy Environm & Biol Div, Computat Directorate, Mailstop L-174,70000 East Ave, Livermore, CA 94550 USA.
EM zhou4@llnl.gov
NR 12
TC 70
Z9 70
U1 2
U2 11
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 JAN
PY 2007
VL 35
SI SI
BP D391
EP D394
DI 10.1093/nar/gkl791
PG 4
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 126EI
UT WOS:000243494600081
PM 17090593
ER

PT J
AU Lee, SW
   Smith, DS
   Loth, F
   Fischer, PF
   Bassiouny, HS
AF Lee, Sang-Wook
   Smith, David S.
   Loth, Francis
   Fischer, Paul F.
   Bassiouny, Hisham S.
TI Numerical and experimental simulation of transitional flow in a blood
   vessel junction
SO NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
LA English
DT Article
ID INTIMAL-MEDIAL HYPERPLASIA; ARTERIOVENOUS LOOP GRAFTS; TO-SIDE
   ANASTOMOSIS; WALL SHEAR-STRESS; PULSATILE FLOW; VENOUS ANASTOMOSIS;
   STEADY; MODEL; PATTERNS; PROFILES
AB Transitional flow within a subject-specific arteriovenous graft is examined through direct numerical simulation and experimental techniques. Simulations employing the spectral element method are conducted at Reynolds number 1,200 with two different flow divisions under a Newtonian fluid assumption. Laser Doppler anemometry is used to experimentally measure velocity in an optically clear rigid model with the same geometry. Good agreement is observed for both flow divisions with respect to time-averaged and fluctuating velocity. The flow field is characterized by a high-speed jet along the floor, flow separation, and a generally complex three-dimensional flow pattern. These results are novel in that they represent the first detailed comparison between experiments and numerical simulations for transitional flow within a subject-specific blood vessel junction.
C1 Univ Illinois, Dept Mech & Ind Engn, Chicago, IL 60607 USA.
   Robarts Res Inst, Imaging Res Labs, London, ON N6A 5C1, Canada.
   Univ Illinois, Dept Bioengn, Chicago, IL 60607 USA.
   Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA.
   Univ Chicago, Dept Surg, Chicago, IL 60637 USA.
RP Loth, F (reprint author), Univ Illinois, Dept Mech & Ind Engn, 842 W Taylor St,M-C 251, Chicago, IL 60607 USA.
EM floth@uic.edu
RI Loth, Francis/C-1177-2008; Lee, Sang-Wook/C-6666-2011
OI Lee, Sang-Wook/0000-0002-8600-9991
NR 31
TC 11
Z9 11
U1 0
U2 4
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 1040-7782
J9 NUMER HEAT TR A-APPL
JI Numer. Heat Tranf. A-Appl.
PD JAN 1
PY 2007
VL 51
IS 1
BP 1
EP 22
DI 10.1080/10407780600710375
PG 22
WC Thermodynamics; Mechanics
SC Thermodynamics; Mechanics
GA 117ZV
UT WOS:000242912700001
ER

PT S
AU Lebensohn, RA
   Brenner, R
   Castelnau, O
AF Lebensohn, Ricardo A.
   Brenner, Renald
   Castelnau, Olivier
BE CeasarDeSa, JMA
   Santos, AD
TI Full-field model and experimental validation of subgrain texture and
   microstructure evolution of polycrystalline copper
SO NUMIFORM '07: MATERIALS PROCESSING AND DESIGN: MODELING, SIMULATION AND
   APPLICATIONS, PTS I AND II
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 9th International Conference on Numerical Methods in Industrial Forming
   Processes (NUMIFORM 07)
CY JUN 17-21, 2007
CL Univ Porto, Fac Engn, Oporto, PORTUGAL
SP Inst Mech Engn & Ind Management
HO Univ Porto, Fac Engn
DE texture; microstructure; polycrystal; copper; orientation imaging
   microscopy; Fast Fourier Transform; micromechanical fields
ID ORIENTATION; COMPOSITES
AB An efficient full-field formulation based on Fast Fourier Transforms (FFT) for the prediction of the viscoplastic deformation of polycrystals is applied to the study of the subgrain texture and microstructure evolution in a copper aggregate deformed under tension. Direct input from OIM images is used in the construction of the initial unit cell. Average orientations and misorientations predicted with the FFT-based approach after 11% tensile strain are directly compared with OIM measurements, showing a reasonable agreement. The differences between misorientations of surface grains compared with bulk grains are estimated, and the orientation-dependence of grain's misorientations is studied. Measurements and simulations agree in that grains with initial orientation near (110) tend to develop higher misorientations, as deformation proceeds. This behavior can be explained in terms of attraction towards the two different stable orientations and grain interaction. Only models that account for grain interaction, like the FFT-based formulation, are able to capture these effects.
C1 [Lebensohn, Ricardo A.] Los Alamos Natl Lab, Div Mat Sci & Technol, POB 1663, Los Alamos, NM 87544 USA.
   [Brenner, Renald; Castelnau, Olivier] Univ Paris 13, Lab Proprietes Mecan & Thermodynam Mat, F-93430 Villetaneuse, France.
RP Lebensohn, RA (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, POB 1663, Los Alamos, NM 87544 USA.
RI castelnau, olivier/E-7789-2011; Lebensohn, Ricardo/A-2494-2008
OI castelnau, olivier/0000-0001-7422-294X; Lebensohn,
   Ricardo/0000-0002-3152-9105
NR 9
TC 1
Z9 1
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0415-1
J9 AIP CONF PROC
PY 2007
VL 908
BP 369
EP +
PN 1-2
PG 2
WC Engineering, Mechanical; Materials Science, Multidisciplinary;
   Metallurgy & Metallurgical Engineering; Physics, Multidisciplinary
SC Engineering; Materials Science; Metallurgy & Metallurgical Engineering;
   Physics
GA BGH23
UT WOS:000246933500054
ER

PT S
AU Liu, WN
   Sun, X
   Roukolainen, R
   Gayden, XH
AF Liu, Wenning
   Sun, Xin
   Roukolainen, Robert
   Gayden, Xiaohong
BE CeasarDeSa, JMA
   Santos, AD
TI Investigation of forming performance of laminated steel sheets using
   finite element analyses
SO NUMIFORM '07: MATERIALS PROCESSING AND DESIGN: MODELING, SIMULATION AND
   APPLICATIONS, PTS I AND II
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 9th International Conference on Numerical Methods in Industrial Forming
   Processes (NUMIFORM 07)
CY JUN 17-21, 2007
CL Univ Porto, Fac Engn, Oporto, PORTUGAL
SP Inst Mech Engn & Ind Management
HO Univ Porto, Fac Engn
DE laminated steel sheet; fmite element analysis; forming performance;
   polymer; viscoelasticity
AB Laminated steel sheets have been used in automotive structures for reducing in-cabin noise. However, due to the marked difference in material properties of the different laminated layers, integrating laminated steel parts into the manufacturing processes can be challenging. Especially, the behavior of laminated sheets during forming processes is very different from that of monolithic steel sheets. During the deep-draw forming process, large shear deformation and corresponding high interfacial stress may initiate and propagate interfacial cracks between the core polymer and the metal skin, hence degrading the performance of the laminated sheets. In this paper, the formability of the laminated steel sheets is investigated by means of numerical analysis. The goal of this work is to gain insight into the relationship between the individual properties of the laminated sheet layers and the corresponding formability of the laminated sheet as a whole, eventually leading to reliable design and successful forming process development of such materials. Finite element analyses of laminate sheet forming are presented. Effects of polymer core thickness and viscoelastic properties of the polymer core, as well as punching velocity, are also investigated.
C1 [Liu, Wenning; Sun, Xin] Pacific NorthWest Natl Lab, PO Box 999, Richland, WA 99352 USA.
   [Roukolainen, Robert; Gayden, Xiaohong] Gen Motors R&D Ctr, Warren, MI 48090 USA.
RP Liu, WN (reprint author), Pacific NorthWest Natl Lab, PO Box 999, Richland, WA 99352 USA.
NR 4
TC 2
Z9 2
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0415-1
J9 AIP CONF PROC
PY 2007
VL 908
BP 895
EP +
PN 1-2
PG 2
WC Engineering, Mechanical; Materials Science, Multidisciplinary;
   Metallurgy & Metallurgical Engineering; Physics, Multidisciplinary
SC Engineering; Materials Science; Metallurgy & Metallurgical Engineering;
   Physics
GA BGH23
UT WOS:000246933500139
ER

PT S
AU Davis, K
   Striegnitz, J
AF Davis, Kei
   Striegnitz, Joerg
BE Sudholt, M
   Consel, C
TI Parallel/high-performance object-oriented scientific computing today -
   Report on the WSPOOSC at ECOOP'06
SO OBJECT-ORIENTED TECHNOLOGY: ECOOP 2006 WORKSHOP READER
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT ECOOP 2006 Workshop
CY JUL 03-07, 2006
CL Nantes, FRANCE
SP Aito, Ecole Mines Nantes, Univ Nantes, Iona, INRIA, CNRS, ACM, SIGPLAN, SIGSOFT, Microsoft Res, SUN Microsyst, Google, IBM, ILOG, France Telecom, ERCIM, Nates Metropole, Paysdela Loire
C1 [Davis, Kei] Los Alamos Natl Lab, CCS-3,MS B256, Los Alamos, NM 87545 USA.
   [Striegnitz, Joerg] Univ Appl Sci Regensburg, D-93053 Regensburg, Germany.
RP Davis, K (reprint author), Los Alamos Natl Lab, CCS-3,MS B256, Los Alamos, NM 87545 USA.
EM Kei.Davis@1an1.gov; joerg.striegnitz@informtik.fh-regensburg.de
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-71772-0
J9 LECT NOTES COMPUT SC
PY 2007
VL 4379
BP 141
EP +
PG 2
WC Computer Science, Theory & Methods
SC Computer Science
GA BGE93
UT WOS:000246368100015
ER

PT J
AU Mendell, MJ
   Fisk, WJ
AF Mendell, M. J.
   Fisk, W. J.
TI Is health in office buildings related only to psychosocial factors?
SO OCCUPATIONAL AND ENVIRONMENTAL MEDICINE
LA English
DT Letter
ID SYMPTOMS; QUALITY; WORKERS
C1 Lawrence Berkeley Lab, Indoor Environm Dept, Berkeley, CA 94720 USA.
RP Mendell, MJ (reprint author), Lawrence Berkeley Lab, Indoor Environm Dept, Cyclotron Rd,MS 90-3058, Berkeley, CA 94720 USA.
EM mjmendell@lbl.gov
NR 11
TC 8
Z9 8
U1 0
U2 0
PU B M J PUBLISHING GROUP
PI LONDON
PA BRITISH MED ASSOC HOUSE, TAVISTOCK SQUARE, LONDON WC1H 9JR, ENGLAND
SN 1351-0711
J9 OCCUP ENVIRON MED
JI Occup. Environ. Med.
PD JAN
PY 2007
VL 64
IS 1
BP 69
EP 69
PG 1
WC Public, Environmental & Occupational Health
SC Public, Environmental & Occupational Health
GA 119VT
UT WOS:000243043100015
PM 17191329
ER

PT J
AU Kanarska, Y
   Shchepetkin, A
   McWilliams, JC
AF Kanarska, Y.
   Shchepetkin, A.
   McWilliams, J. C.
TI Algorithm for non-hydrostatic dynamics in the regional oceanic modeling
   system
SO OCEAN MODELLING
LA English
DT Article
ID NAVIER-STOKES EQUATIONS; FREE-SURFACE FLOWS; SOUTH CHINA SEA; 2ND-ORDER
   PROJECTION METHOD; NONLINEAR INTERNAL WAVES; PRESSURE-GRADIENT FORCE;
   NUMERICAL-SIMULATION; SOLITARY WAVES; FINITE-VOLUME; COORDINATE
AB A non-hydrostatic algorithm for the Regional Oceanic Modeling System (ROMS) is proposed. It is based on a decomposition technique for hydrostatic and non-hydrostatic pressure. The algorithm has a pressure-correction scheme with split-explicit time-stepping for baroclinic and barotropic vertical modes with a free surface. The algorithm implementation requires solving a Poisson equation for a non-hydrostatic pressure that has a non-symmetric matrix in discrete form. The efficiency of a different class of solvers and preconditioners were tested. The algorithm is successfully implemented with several examples where non-hydrostatic effects are important. These include standing external gravity waves; strongly non-linear internal wave generation and transformation; stratified shear instability and its associated mixing; and non-linear internal tidal generation over a ridge. The corresponding changes in the pre-processing and post-processing infrastructure in the existing hydrostatic ROMS code were performed to implement parallel elliptic solvers and a new set of dynamical equations. (C) 2007 Elsevier Ltd. All rights reserved.
C1 Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095 USA.
RP Kanarska, Y (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM kanarskal@llnl.gov
NR 65
TC 40
Z9 40
U1 0
U2 5
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1463-5003
J9 OCEAN MODEL
JI Ocean Model.
PY 2007
VL 18
IS 3-4
BP 143
EP 174
DI 10.1016/j.ocemod.2007.04.001
PG 32
WC Meteorology & Atmospheric Sciences; Oceanography
SC Meteorology & Atmospheric Sciences; Oceanography
GA 202IL
UT WOS:000248895100001
ER

PT J
AU Rainville, L
   Jayne, SR
   McClean, JL
   Maltrud, ME
AF Rainville, L.
   Jayne, S. R.
   McClean, J. L.
   Maltrud, M. E.
TI Formation of subtropical mode water in a high-resolution ocean
   simulation of the Kuroshio Extension region
SO OCEAN MODELLING
LA English
DT Article
ID NORTH-ATLANTIC OCEAN; MASS FORMATION; POTENTIAL VORTICITY; DECADAL
   VARIABILITY; PACIFIC; CIRCULATION; SEA; LAYER; TRANSFORMATION;
   COMPUTATION
AB A high-resolution numerical model is used to examine the formation and variability of the North Pacific Subtropical Mode Water (STMW) over a 3-year period. The STMW distribution is found to be highly variable in both space and time, a characteristic often unexplored because of sparse observations or the use of coarse resolution simulations. Its distribution is highly dependent on eddies, and where it was renewed during the previous winter. Although the potential vorticity fluxes associated with down-front winds can be of the same order of magnitude or even greater than the diabatic ones due to airsea temperature differences, the latter dominate the potential vorticity budget on regional and larger scales. Air-sea fluxes, however, are dominated by a few strong wind events, emphasizing the importance of short time scales in the formation of mode waters. In the Kuroshio Extension region, both advection and mixing play important roles to remove the STMW from the formation region. (C) 2007 Elsevier Ltd. All rights reserved.
C1 Woods Hole Oceanog Inst, Dept Phys Oceanog, Woods Hole, MA 02543 USA.
   Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Rainville, L (reprint author), Woods Hole Oceanog Inst, Dept Phys Oceanog, MS 21, Woods Hole, MA 02543 USA.
EM lrainville@whoi.edu; sjayne@whoi.edu; jmcclean@ucsd.edu;
   maltrud@lanl.gov
NR 41
TC 23
Z9 23
U1 0
U2 0
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1463-5003
J9 OCEAN MODEL
JI Ocean Model.
PY 2007
VL 17
IS 4
BP 338
EP 356
DI 10.1016/j.ocemod.2007.03.002
PG 19
WC Meteorology & Atmospheric Sciences; Oceanography
SC Meteorology & Atmospheric Sciences; Oceanography
GA 186AY
UT WOS:000247752700004
ER

PT J
AU Bryan, FO
   Hecht, MW
   Smith, RD
AF Bryan, Frank O.
   Hecht, Matthew W.
   Smith, Richard D.
TI Resolution convergence and sensitivity studies with North Atlantic
   circulation models. Part I: The western boundary current system
SO OCEAN MODELLING
LA English
DT Article
ID GULF-STREAM; NUMERICAL-SIMULATION; OCEAN MODELS; DEEP-WATER;
   PARAMETERIZATION; 68-DEGREES-W; SEPARATION; TRANSPORT; IMPACT; EXIT
AB The fidelity of numerical simulations of the general circulation of the North Atlantic Ocean in basin- to global-scale models have improved considerably in the last several years. This improvement appears to represent a regime shift in the dynamics of the simulated flow as the horizontal grid spacing decreases to around 10 km. Nevertheless, some significant biases in the simulated circulation and substantial uncertainties about the robustness of these results with respect to parameterization choices remain. A growing collection of simulations obtained with the POP primitive equation model allow us to investigate the convergence properties and sensitivity of high resolution numerical simulations of the North Atlantic, with particular attention given to Gulf Stream separation and the subsequent path of the North Atlantic Current into the Northwest Corner. Increases in resolution and reductions in dissipation both contribute to the improvements in the circulation seen in recent studies. We find that our highest resolution eddy-resolving simulations retain an appreciable sensitivity to the closure scheme. Our most realistic simulations of the Gulf Stream are not obtained at the lowest levels of dissipation, while the simulation of the North Atlantic Current continues to improve as dissipation is reduced to near the numerical stability limit. In consequence, there is a limited range of parameter space where both aspects of the simulated circulation can be brought into agreement with observations. This experience gained with the comparatively affordable regional North Atlantic model is now being used to configure the next generation of ocean climate models. (c) 2006 Elsevier Ltd. All rights reserved.
C1 Natl Ctr Atmospher Res, Boulder, CO 80303 USA.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Bryan, FO (reprint author), Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80303 USA.
EM bryan@ucar.edu
RI Bryan, Frank/I-1309-2016; 
OI Bryan, Frank/0000-0003-1672-8330; Hecht, Matthew/0000-0003-0946-4007
NR 38
TC 55
Z9 55
U1 0
U2 9
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1463-5003
J9 OCEAN MODEL
JI Ocean Model.
PY 2007
VL 16
IS 3-4
BP 141
EP 159
DI 10.1016/j.ocemod.2006.08.005
PG 19
WC Meteorology & Atmospheric Sciences; Oceanography
SC Meteorology & Atmospheric Sciences; Oceanography
GA 149XM
UT WOS:000245180200001
ER

PT B
AU Carriere, O
   Hermand, JP
   Meyer, M
   Candy, JV
AF Carriere, Olivier
   Hermand, Jean-Pierre
   Meyer, Matthias
   Candy, James V.
GP IEEE
TI Dynamic estimation of the sound-speed profile from broadband acoustic
   measurements
SO OCEANS 2007 - EUROPE, VOLS 1-3
LA English
DT Proceedings Paper
CT Oceans 2007 Europe International Conference
CY JUN 18-21, 2007
CL Aberdeen, SCOTLAND
DE ocean acoustic tomography; unscented Kalman filter; empirical orthogonal
   functions
ID SHALLOW-WATER; GEOACOUSTIC INVERSION; WAVE-GUIDE
AB Global search and more recently adjoint-based inversion methods used in ocean acoustics showed their effectiveness in the estimation of the sound-speed profile (SSP) in water columns of several environments. In the framework of the European Seas Observatory Network (ESONET) an essential part of the research and technology focuses on continuous and long term observations to characterize dynamic ocean processes and monitor the global state of the ocean. Therefore, the development of high performance integrated tools for acoustic inversion is one of the attractive components in this network. For the purpose of efficient data assimilation this paper investigates sequential methods that are able to update sound-speed profile parameters, typically the coefficients of empirical orthogonal functions (EOF), with respect to new incoming acoustic or hydrographic measurements and take into account the seafloor and sub-seafloor acoustic properties in a shallow water environment. A formulation using Kalman filters is suitable for a sequential treatment. This paper investigates the application of two different extensions of the Kalman filter, the extended Kalman filter and the more recent unscented Kalman filter for comparison.
C1 [Carriere, Olivier; Hermand, Jean-Pierre; Meyer, Matthias] ULB, Dept Opt & Acoust, Environm Hydroacoust Lab, Ave Franklin D Roosevelt,50 CP 194-05, B-1050 Brussels, Belgium.
   [Candy, James V.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Carriere, O (reprint author), ULB, Dept Opt & Acoust, Environm Hydroacoust Lab, Ave Franklin D Roosevelt,50 CP 194-05, B-1050 Brussels, Belgium.
EM jhermand@ulb.ac.be
FU Fonds pour la formation a la Recherche dans l'Industrie et dans
   l'Agriculture (FRIA), Belgium; European Seas Observatory Network Network
   of Excellence (ESONET NoE); European 6th Framework Programme; research
   priority Global change and ecosystems [1.1.6.3]; European Commission
FX The authors acknowledge the support of the Fonds pour la formation a la
   Recherche dans l'Industrie et dans l'Agriculture (FRIA), Belgium, and
   the European Seas Observatory Network Network of Excellence (ESONET NoE)
   funded by the European 6th Framework Programme, research priority
   1.1.6.3 Global change and ecosystems, European Commission.
NR 16
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-0634-0
PY 2007
BP 1270
EP +
PG 2
WC Engineering, Environmental; Engineering, Ocean
SC Engineering
GA BHK06
UT WOS:000253702200241
ER

PT S
AU Viola, MV
   Patrinos, AA
AF Viola, M. V.
   Patrinos, A. A.
BE Sakas, DE
   Simpson, BA
TI A neuroprosthesis for restoring sight
SO OPERATIVE NEUROMODULATION: VOL 2: NEURAL NETWORKS SURGERY
SE Acta Neurochirurgica Supplementum
LA English
DT Article; Book Chapter
DE Macular degeneration; retinitis pigmentosa; blindness; artificial
   vision; retina; neuroprosthesis; electrical stimulation; neuromodulation
ID ELECTRICAL-STIMULATION; RETINITIS-PIGMENTOSA; VISUAL-CORTEX;
   MORPHOMETRIC-ANALYSIS; BLIND; PHOTORECEPTORS; IMPLANTS
AB Macular degeneration (MD) and retinitis pigmentosa (RP), two diseases that cause degeneration of retinal photoreceptor cells, are the leading causes of blindness in the United States. Anatomical studies have shown that other retinal neuronal cells (bipolar cells, ganglion cells) are preserved in these diseases and they are capable of eliciting visual percepts when electrically stimulated. We describe the design of a prototype 16-electrode retinal prosthesis, and the physiological and clinical results on six blind patients with RP who had the device implanted. The US Department of Energy artificial retina program is described. The goal of the program is construction of a 1000-electrode retinal neuroprosthesis with the potential of enabling blind patients to read large print and ambulate with ease.
C1 [Viola, M. V.; Patrinos, A. A.] US DOE, Off Biol & Environm Res, Off Sci, Germantown, MD USA.
RP Patrinos, AA (reprint author), US DOE, Off Biol & Environm Res, 1000 Independence Ave SW, Washington, DC 20585 USA.
EM ari.patrinos@science.doe.gov
NR 26
TC 2
Z9 2
U1 0
U2 2
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
SN 0065-1419
BN 978-3-211-33081-4
J9 ACTA NEUROCHIR SUPPL
JI Acta Neurochir. Suppl.
PY 2007
VL 97
BP 481
EP 486
D2 10.1007/978-3-211-33081-4
PN 2
PG 6
WC Clinical Neurology; Neurosciences; Surgery
SC Neurosciences & Neurology; Surgery
GA BNJ30
UT WOS:000274732500055
PM 17691338
ER

PT S
AU Chen, DC
   Jones, SM
   Silva, DA
   Olivier, SS
AF Chen, Diana C.
   Jones, Steven M.
   Silva, Dennis A.
   Olivier, Scot S.
BE Manns, F
   Soederberg, PG
   Ho, A
   Stuck, BE
   Belkin, M
TI High-resolution adaptive optics scanning laser ophthalmoscope with dual
   deformaMe mirrors for large aberration correction - art. no. 64261L
SO Ophthalmic Technologies XVII
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT 17th Conference on Ophthalmic Technologies
CY JAN 20-23, 2007
CL San Jose, CA
SP SPIE, Alcon
DE scanning laser ophthalmoscope; adaptive optics; deformable mirror;
   off-axis optical aberrations
ID HUMAN EYE; IMAGE QUALITY; COMPENSATION; IMPROVEMENT; POPULATION; VISION
AB w Scanning laser ophthalmoscopes with adaptive optics (AOSLO) have been shown previously to provide a non-invasive, cellular-scale view of the living human retina. However, the clinical utility of these systems has been limited by the available deformable mirror technology. In this paper, we demonstrate that the use of dual deformable mirrors can effectively compensate large aberrations in the human retina, making the AOSLO system a viable, non-invasive, high-resolution imaging tool for clinical diagnostics. We used a bimorph deformable mirror to correct low-order aberrations with relatively large amplitudes. The bimorph mirror is manufactured by Aoptix, Inc. with 37 elements and 18 mu m stroke in a 10 mm aperture. We used a MEMS deformable mirror to correct high-order aberrations with lower amplitudes. The MEMS mirror is manufactured by Boston Micromachine, Inc with 144 elements and 1.5 mu m stroke in a 3 mm aperture. We have achieved near diffraction-limited retina images using the dual deformable mirrors to correct large aberrations up to +/- 3D of defocus and +/- 3D of cylindrical aberrations with test subjects. This increases the range of spectacle corrections by the AO systems by a factor of 10, which is crucial for use in the clinical environment. This ability for large phase compensation can eliminate accurate refractive error fitting for the patients, which greatly improves the system ease of use and efficiency in the clinical environment.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Chen, DC (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94550 USA.
NR 18
TC 1
Z9 1
U1 1
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6539-9
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6426
BP L4261
EP L4261
AR 64261L
DI 10.1117/12.698728
PG 10
WC Engineering, Biomedical; Ophthalmology; Optics
SC Engineering; Ophthalmology; Optics
GA BGF99
UT WOS:000246519000040
ER

PT S
AU Kemme, SA
   Boye, RR
   Peters, DW
   Nellums, RO
AF Kemme, S. A.
   Boye, R. R.
   Peters, D. W.
   Nellums, R. O.
BE Jiang, S
   Digonnet, MJF
TI Active resonant subwavelength grating for scannerless range imaging
   sensors - art. no. 646906
SO Optical Components and Materials IV
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optical Components and Materials IV
CY JAN 22-24, 2007
CL San Jose, CA
AB We present the design and initial fabrication for a wavelength-agile, high-speed modulator that enables a long-term vision for the THz Scannerless Range Imaging (SRI) sensor. This modulator takes the place of the currently utilized SRI micro-channel plate which is limited to photocathode sensitive wavelengths (primarily in the visible and near-IR regimes).
   The new component is an active Resonant Subwavelength Grating (RSG). An RSG functions as an extremely narrow wavelength and angular band reflector, or mode selector. Theoretical studies predict that the infinite, laterally-extended RSG can reflect 100% of the resonant light while transmitting the balance of the other wavelengths. Previous experimental realization of these remarkable predictions has been impacted primarily by fabrication challenges. Even so, we have demonstrated large-area (1.0mm) passive RSG reflectivity as high as 100.2%, normalized to deposited gold. In this work, we transform the passive RSG design into an active laser-line modulator.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Kemme, SA (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 5
TC 5
Z9 5
U1 2
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6582-5
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6469
BP 46906
EP 46906
AR 646906
DI 10.1117/12.701662
PG 12
WC Materials Science, Multidisciplinary; Optics
SC Materials Science; Optics
GA BGC69
UT WOS:000246050500004
ER

PT S
AU Yellowhair, J
   Su, P
   Novak, M
   Burge, J
AF Yellowhair, Julius
   Su, Peng
   Novak, Matt
   Burge, Jim
BE Burge, JH
   Faehnle, OW
   Williamson, R
TI Fabrication and testing of large flats - art. no. 667107
SO OPTICAL MANUFACTURING AND TESTING VII
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optical Manufacturing and Testing VII
CY AUG 28-29, 2007
CL San Diego, CA
SP SPIE
DE large flat fabrication; metrology; optical manufacturing
AB Flat mirrors of around 1 meter are efficiently manufactured with large plano polishers and measured with Fizeau interferometry. We have developed technologies and hardware that allow fabrication and testing of flat mirrors that are much larger. The grinding and polishing of the large surfaces uses conventional laps driven under computer control for accurate and systematic control of the surface figure. The measurements are provided by a combination of a scanning pentaprism test, capable of measuring power and low order irregularity over diameters up to 8 meters, and subaperture Fizeau interferometry. We have developed a vibration insensitive Fizeau interferometer with I meter aperture and software to optimally combine the data from the subaperture tests. These methods were proven on a 1.6 m flat mirror that was finished to 6 nm rms irregularity and 11 nm rms power.
C1 [Yellowhair, Julius] Sandia Natl Labs, Albuquerque, NM 87123 USA.
RP Yellowhair, J (reprint author), Sandia Natl Labs, 1515 Eubank SE, Albuquerque, NM 87123 USA.
NR 12
TC 0
Z9 0
U1 1
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6819-2
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6671
BP 67107
EP 67107
DI 10.1117/12.736775
PG 15
WC Engineering, Manufacturing; Optics
SC Engineering; Optics
GA BHH95
UT WOS:000253371300004
ER

PT S
AU Sopori, B
AF Sopori, Bhushan
BE Myers, DR
TI PV optics: A software package for solar cell and module design - art.
   no. 665206
SO Optical Modeling and Measurements for Solar Energy Systems
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optical Modeling and Measurements for Solar Energy Systems
CY AUG 26-28, 2007
CL San Diego, CA
SP SPIE
AB PV Optics is a user-friendly software package developed to design and analyze solar cells and modules. It is applicable to a variety of optical structures, including thin and thick cells with light-trapping structures and metal optics. Using a combination of wave and ray optics to include effects of coherence and interference, it can be used to design single-junction and multijunction solar cells and modules. This paper describes some basic applications of PV Optics for crystalline and amorphous Si solar cell design. We present examples to examine the effects on solar cell performance of wafer thickness, antireflection coating thickness, texture height, and metal loss.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Sopori, B (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
NR 7
TC 1
Z9 1
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6800-0
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6652
BP 65206
EP 65206
AR 665206
DI 10.1117/12.736550
PG 9
WC Astronomy & Astrophysics; Optics
SC Astronomy & Astrophysics; Optics
GA BGX02
UT WOS:000251046300005
ER

PT S
AU Myers, DR
AF Myers, Daryl R.
BE Myers, DR
TI General cloud cover modifier for clear sky solar radiation models - art.
   no. 665208
SO Optical Modeling and Measurements for Solar Energy Systems
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optical Modeling and Measurements for Solar Energy Systems
CY AUG 26-28, 2007
CL San Diego, CA
SP SPIE
DE solar radiation model; cloud cover modifier; global hemispherical solar
   radiation
ID ARTIFICIAL-INTELLIGENCE TECHNIQUES; HOURLY GLOBAL IRRADIANCE;
   VALIDATION; INDEX
AB Worldwide lack of comprehensive measured solar radiation resource data for solar system design is well known. Several simple clear sky solar radiation models for computing hourly direct, diffuse and global hemispherical solar radiation have been developed over the past 25 years. The simple model of Richard Bird, Iqbal's parameterization C, and Gueymard's REST model are popular for estimating maximum hourly solar resources. We describe a simple polynomial in cloud cover (octa) modifier for these models that produces realistic time series of hourly solar radiation data representative of naturally occurring solar radiation conditions under all sky conditions. Surface cloud cover observations (Integrated Surface Hourly Data) from the National Climatic Data Center are the only additional (hourly) input data to model total hemispherical solar radiation under all sky conditions. Performance was evaluated using three years of hourly solar radiation data from 31 sites in the 1961-1990 National Solar Radiation Data Base. Mean bias errors range from - 10% to -20%, and are clear sky model dependant. Root mean square error of about 40%, are also dependent upon the particular model used and the uncertainty in the specific clear sky model inputs and lack of information on cloud type and spatial distributions.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Myers, DR (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
NR 30
TC 0
Z9 0
U1 1
U2 5
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6800-0
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6652
BP 65208
EP 65208
AR 665208
DI 10.1117/12.732472
PG 12
WC Astronomy & Astrophysics; Optics
SC Astronomy & Astrophysics; Optics
GA BGX02
UT WOS:000251046300007
ER

PT S
AU Porter, R
   Loveland, R
   Rosten, E
AF Porter, R.
   Loveland, R.
   Rosten, E.
BE Casasent, DP
   Chao, TH
TI Building robust appearance models using on-line feature selection - art.
   no. 657409
SO Optical Pattern Recognition XVIII
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optical Pattern Recognition XVIII
CY APR 09-10, 2007
CL Orlando, FL
SP SPIE
DE tracking; recognition; adaptive appearance models; feature selection
ID TRACKING
AB In many tracking applications, adapting the target appearance model over time can improve performance. This approach is most popular in high frame rate video applications where latent variables, related to the objects appearance (e.g., orientation and pose), vary slowly from one frame to the next. In these cases the appearance model and the tracking system are tightly integrated, and latent variables are often included as part of the tracking system's dynamic model. In this paper we describe our efforts to track cars in low frame rate data (I frame / second), acquired from a highly unstable airborne platform. Due to the low frame rate, and poor image quality, the appearance of a particular vehicle varies greatly from one frame to the next. This leads us to a different problem: how can we build the best appearance model from all instances of a vehicle we have seen so far. The best appearance model should maximize the future performance of the tracking system, and maximize the chances of reacquiring the vehicle once it leaves the field of view. We propose an online feature selection approach to this problem and investigate the performance and computational trade-offs with a real-world dataset.
C1 Los Alamos Natl Lab, Int Space & Response Technol Div, Los Alamos, NM 87545 USA.
RP Porter, R (reprint author), Los Alamos Natl Lab, Int Space & Response Technol Div, Los Alamos, NM 87545 USA.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6696-9
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6574
BP 57409
EP 57409
AR 657409
DI 10.1117/12.721439
PG 9
WC Computer Science, Information Systems; Optics; Imaging Science &
   Photographic Technology
SC Computer Science; Optics; Imaging Science & Photographic Technology
GA BGK82
UT WOS:000248070800008
ER

PT S
AU Malone, RM
   Celeste, JR
   Celliers, PM
   Frogget, BC
   Guyton, RL
   Kaufman, MI
   Lee, TL
   MacGowan, BJ
   Ng, EW
   Reinbachs, IP
   Robinson, RB
   Tunnell, TW
   Watts, PW
AF Malone, Robert M.
   Celeste, John R.
   Celliers, Peter M.
   Frogget, Brent C.
   Guyton, Robert L.
   Kaufman, Morris I.
   Lee, Tony L.
   MacGowan, Brian J.
   Ng, Edmund W.
   Reinbachs, Imants P.
   Robinson, Ronald B.
   Tunnell, Thomas W.
   Watts, Phillip W.
BE Sasian, JM
   Ruda, MC
TI Optical alignment techniques for line-imaging velocity interferometry
   and line-imaging self-emission of targets at the National Ignition
   Facility (NIF)
SO OPTICAL SYSTEM ALIGNMENT AND TOLERANCING
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Optical System Alignment and Tolerancing
CY AUG 26-27, 2007
CL San Diego, CA
DE VISAR; optical relay; optical alignment; optical tolerancing;
   interferometer; National Ignition Facility (NIF); streak camera
AB The National Ignition Facility (NIF) requires optical diagnostics for measuring shock velocities in shock physics experiments. The nature of the NIF facility requires the alignment of complex three-dimensional optical systems of very long distances. Access to the alignment mechanisms can be limited, and any alignment system must be operator-friendly. The Velocity Interferometer System for Any Reflector (VISAR) measures shock velocities and shock breakout times of 1- to 5-mm targets at a location remote to the NIF target chamber. A third imaging system measures self-emission of the targets. These three optical systems using the same vacuum chamber port each have a total track of 21 m. All optical tenses are on kinematic mounts or sliding rails, enabling pointing accuracy of the optical axis to be systematically checked. Counter-propagating laser beams (orange and red) align these diagnostics to a listing of tolerances. Floating apertures, placed before and after lens groups, display misalignment by showing the spread of alignment spots created by the orange and red alignment lasers. Optical elements include 1-in. to 15-in. diameter mirrors, lenses with up to 10.5-in. diameters, beam splitters, etalons, dove prisms, filters, and pellicles. Alignment of more than 75 optical elements must be verified before each target shot. Archived images from eight alignment cameras prove proper alignment is achieved before each shot.
C1 [Malone, Robert M.; Frogget, Brent C.; Guyton, Robert L.; Kaufman, Morris I.; Reinbachs, Imants P.; Tunnell, Thomas W.; Watts, Phillip W.] LLC, Natl Secur Technol, Los Alamos, NM 87544 USA.
   [Celeste, John R.; Celliers, Peter M.; Lee, Tony L.; MacGowan, Brian J.; Ng, Edmund W.; Robinson, Ronald B.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Malone, RM (reprint author), LLC, Natl Secur Technol, POB 809,182 E Gate Dr, Los Alamos, NM 87544 USA.
NR 7
TC 2
Z9 2
U1 0
U2 6
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6824-6
J9 PROC SPIE
PY 2007
VL 6676
AR 667608
DI 10.1117/12.731639
PG 15
WC Instruments & Instrumentation; Optics
SC Instruments & Instrumentation; Optics
GA BHI45
UT WOS:000253415400007
ER

PT S
AU Setchell, RE
   Berry, DM
AF Setchell, Robert E.
   Berry, Dante M.
BE Thomes, WJ
   Dickey, FM
TI Challenges in high-intensity laser injection into multiple optical
   fibers - art. no. 666203
SO OPTICAL TECHNOLOGIES FOR ARMING, SAFING, FUZING, AND FIRING III
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optical Technologies for Arming Safing, Fuzing, and Firing
   III
CY AUG 29-30, 2007
CL San Diego, CA
SP SPIE
DE high-intensity fiber transmission; multiple-fiber laser injection; laser
   damage in optical fibers
ID MULTIMODE FIBERS; TRANSMISSION; DAMAGE; SYSTEM; DELIVERY; BEAM
AB A growing number of applications involve the transmission of high-intensity laser pulses through optical fibers. Previously, our particular interests led to a series of studies on single-fiber transmission of Q-switched, 1064 nm pulses from multimode Nd:YAG lasers through step-index, multimode, fused silica fibers. The maximum pulse energy that could be transmitted through a given fiber was limited by the onset of laser-induced breakdown or damage. Breakdown at the fiber entrance face was often the first limiting process encountered, but other mechanisms were observed that could result in catastrophic damage at either fiber face, within the initial "entry" segment of the fiber, and at other internal sites along the fiber path. These studies examined system elements that can govern the relative importance of different damage mechanisms, including laser characteristics, the design and alignment of laser-to-fiber injection optics, fiber end-face preparation, and fiber routing. In particular, criteria were established for injection optics in order to maximize margins between transmission requirements and thresholds for laser-induced damage. Recent interests have led us to examine laser injection into multiple fibers. Effective methods for generating multiple beams are available, but the resulting beam geometry can lead to challenges in applying the criteria for optimum injection optics. To illustrate these issues, we have examined a three-fiber injection system consisting of a beam-shaping element, a primary injection lens, and a grating beamsplitter. Damage threshold characteristics were established by testing fibers using the injection geometry imposed by this system design.
C1 [Setchell, Robert E.; Berry, Dante M.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Setchell, RE (reprint author), Sandia Natl Labs, MS1421, Albuquerque, NM 87185 USA.
NR 24
TC 0
Z9 0
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6810-9
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6662
BP 66203
EP 66203
DI 10.1117/12.736494
PG 15
WC Engineering, Mechanical; Optics
SC Engineering; Optics
GA BHH93
UT WOS:000253370500002
ER

PT S
AU Shelton, JW
   Dickey, FM
   Thomes, WJ
AF Shelton, Jason W.
   Dickey, Fred M.
   Thomes, William J., Jr.
BE Thomes, WJ
   Dickey, FM
TI Optically powered firing set using miniature photovoltaic arrays - art.
   no. 666206
SO OPTICAL TECHNOLOGIES FOR ARMING, SAFING, FUZING, AND FIRING III
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optical Technologies for Arming Safing, Fuzing, and Firing
   III
CY AUG 29-30, 2007
CL San Diego, CA
SP SPIE
DE photovoltaic array; firing set; optical power transfer; high voltage
   generation; photocell; isolated power source; optically powered firing
   set
AB A firing set capable of charging a 0.05 mu F capacitor to 1.7 kV is constructed using a 2.5 mm diameter Series Connected Photovoltaic Array (SCPA) in lieu of a transformer as the method of high voltage generation. The source of illumination is a fiber coupled 3 W 808 nm laser diode. This paper discusses the performance and PSpice modeling of an SCPA used in a firing set application.
C1 [Shelton, Jason W.; Dickey, Fred M.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Shelton, JW (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6810-9
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6662
BP 66206
EP 66206
DI 10.1117/12.736907
PG 8
WC Engineering, Mechanical; Optics
SC Engineering; Optics
GA BHH93
UT WOS:000253370500005
ER

PT S
AU Valenzuela, AR
   Rodriguez, G
   Clarke, SA
AF Valenzuela, A. R.
   Rodriguez, G.
   Clarke, S. A.
BE Thomes, WJ
   Dickey, FM
TI Optically-based velocity and topographic measurement systems in the
   nano-scale for developing optical initiation - art. no. 66620A
SO OPTICAL TECHNOLOGIES FOR ARMING, SAFING, FUZING, AND FIRING III
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optical Technologies for Arming Safing, Fuzing, and Firing
   III
CY AUG 29-30, 2007
CL San Diego, CA
SP SPIE
DE laser-ablation; heterodyne; PDV; velocimetry; ultrathin metal layers;
   optical topography
ID SHACK-HARTMANN SENSOR; DYNAMIC-RANGE
AB We have developed a suite of optical diagnostics and analyses for probing the velocity and spatial distribution of ablatively launched metal with nano-scale precision. We utilize a nanosecond laser pulse to launch a thin layer of metal and then use optical and opto-electronic devices to diagnose the velocity and topography. Our Photonic Doppler Velocimeter (PDV) utilizes the heterodyne principle that allows us to track multiple velocity components. We have investigated a number of different methods for analyzing this data to provide increased velocity and temporal resolution. We also discuss the possibilities to extend the sensitivity of the PDV system to provide a compact diagnostic with a broad range of capabilities. Our topographer is based on the Shack-Hartmann interferometer that can resolve the changing shape of the ablated metal surface as it is launched. We compare the experimental data to hydrodynamic simulations to provide a feedback loop to improve our theoretical models. The ultimate goal is to develop a well-understood laser-based firing set for direct optical initiation (DOI) of explosives.
C1 [Valenzuela, A. R.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Valenzuela, AR (reprint author), Los Alamos Natl Lab, MS P950, Los Alamos, NM 87545 USA.
RI Rodriguez, George/G-7571-2012
OI Rodriguez, George/0000-0002-6044-9462
NR 14
TC 0
Z9 0
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6810-9
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6662
BP A6620
EP A6620
DI 10.1117/12.734959
PG 10
WC Engineering, Mechanical; Optics
SC Engineering; Optics
GA BHH93
UT WOS:000253370500009
ER

PT S
AU Clarke, SA
   Murphy, MJ
   Landon, CD
   Mason, TA
   Adrian, RJ
   Akinci, AA
   Martinez, ME
   Thomas, KA
AF Clarke, S. A.
   Murphy, M. J.
   Landon, C. D.
   Mason, T. A.
   Adrian, R. J.
   Akinci, A. A.
   Martinez, M. E.
   Thomas, K. A.
BE Thomes, WJ
   Dickey, FM
TI High-speed multi-frame laser schlieren for visualization of explosive
   events - art. no. 66620C
SO OPTICAL TECHNOLOGIES FOR ARMING, SAFING, FUZING, AND FIRING III
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optical Technologies for Arming Safing, Fuzing, and Firing
   III
CY AUG 29-30, 2007
CL San Diego, CA
SP SPIE
DE schlieren; high speed videography; detonators; explosives; finite
   element simulation
AB High-Speed Multi-Frame Laser Schlieren is used for visualization of a range of explosive and non-explosive events. Schlieren is a well-known technique for visualizing shock phenomena in transparent media. Laser backlighting and a framing camera allow for Schlieren images with very short (down to 5 ns) exposure times, band pass filtering to block out explosive self-light, and 14 frames of a single explosive event.
   This diagnostic has been applied to several explosive initiation events, such as exploding bridgewires (EBW), Exploding Foil Initiators (EFI) (or slappers), Direct Optical Initiation (DOI), and ElectroStatic Discharge (ESD). Additionally, a series of tests have been performed on "cut-back" detonators with varying initial pressing (IP) heights. We have also used this Diagnostic to visualize a range of EBW, EFI, and DOI full-up detonators. The setup has also been used to visualize a range of other explosive events, such as explosively driven metal shock experiments and explosively driven microjets. Future applications to other explosive events such as boosters and IHE booster evaluation will be discussed.
   Finite element codes (EPIC, CTH) have been used to analyze the schlieren images to determine likely boundary or initial conditions to determine the temporal-spatial pressure profile across the output face of the detonator. These experiments are part of a phased plan to understand the evolution of detonation in a detonator from initiation shock through ran to detonation to full detonation to transition to booster and booster detonation.
C1 [Clarke, S. A.; Mason, T. A.; Akinci, A. A.; Martinez, M. E.; Thomas, K. A.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Clarke, SA (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
NR 3
TC 0
Z9 0
U1 1
U2 5
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6810-9
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6662
BP C6620
EP C6620
DI 10.1117/12.732605
PG 9
WC Engineering, Mechanical; Optics
SC Engineering; Optics
GA BHH93
UT WOS:000253370500011
ER

PT S
AU Pelton, M
   Liu, M
   Toussaint, KC
   Kim, HY
   Smith, G
   Pesic, J
   Guyot-Sionnest, P
   Scherer, NF
AF Pelton, Matthew
   Liu, Mingzhao
   Toussaint, Kimani C., Jr.
   Kim, Hee Y.
   Smith, Glenna
   Pesic, Jelena
   Guyot-Sionnest, Philippe
   Scherer, Norbert F.
BE Dholakia, K
   Spalding, GC
TI Plasmon-enhanced optical trapping of individual metal nanorods
SO OPTICAL TRAPPING AND OPTICAL MICROMANIPULATION IV
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Optical Trapping and Optical Micromanipulation IV
CY AUG 26-29, 2007
CL San Diego, CA
SP SPIE
DE optical trapping; plasmons; nanoparticles
ID SINGLE GOLD NANORODS; BIASED DIFFUSION; CARBON NANOTUBES; NANOPARTICLES;
   MANIPULATION; PARTICLES; FORCES; GROWTH; LUMINESCENCE; SPECTROSCOPY
AB We demonstrate three-dimensional optical trapping and orientation of individual An nanorods, Au/Ag core/shell nanorods, and Au bipyramids in solution, using the longitudinal surface-plasmon resonance to enhance optical forces. Laser light that is detuned slightly to the long-wavelength side of the resonance traps individual and multiple particles for up to 20 minutes; by contrast, light detuned to the short-wavelength side repels rods from the laser focus. Under stable-trapping conditions, the trapping time of individual particles depends exponentially on laser power, in agreement with a Kramers escape process. Trapped particles have their long axes aligned with the trapping-laser polarization, as evidenced by a suppression of rotational diffusion about the short axis. When multiple particles are trapped simultaneously, evidence of interparticle interactions is observed, including a nonlinearly increasing two-photon fluorescence intensity, increasing fluorescence fluctuations, and changing fluorescence profiles as the trapped particle number increases.
C1 Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Pelton, M (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM pelton@anl.gov
RI Pelton, Matthew/H-7482-2013; Toussaint, Kimani/A-4611-2014
OI Pelton, Matthew/0000-0002-6370-8765; Toussaint,
   Kimani/0000-0002-6701-4541
NR 43
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6792-8
J9 PROC SPIE
PY 2007
VL 6644
AR 66441C
DI 10.1117/12.741857
PG 14
WC Nanoscience & Nanotechnology; Optics
SC Science & Technology - Other Topics; Optics
GA BGX72
UT WOS:000251162100027
ER

PT S
AU Awwal, AAS
   Law, C
   Ferguson, SW
AF Awwal, Abdul A. S.
   Law, Clement
   Ferguson, S. Walter
BE Awwal, AAS
   Iftekharuddin, KM
   Javidi, B
TI Uncertainty detection for NIF normal pointing beam images - art. no.
   66950R
SO OPTICS AND PHOTONICS FOR INFORMATION PROCESSING
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optics and Photonics for Information Processing
CY AUG 28-30, 2007
CL San Diego, CA
SP SPIE
DE automated optical alignment; Gaussian beam; wavefront correction; image
   processing; image quality detection; position uncertainty; Monte Carlo
   simulation
ID NATIONAL-IGNITION-FACILITY; ALIGNMENT; LASER
AB The National Ignition Facility at the Lawrence Livermore National Laboratory when completed in 2009, will deliver 192-beams aligned precisely at the center of the target chamber producing extreme energy densities and pressures. Video images of laser beams along the beam path are used by automatic alignment algorithms to determine the position of the beams for alignment purposes. However, noise and other optical effects may affect the accuracy of the calculated beam location. Realistic estimation of the uncertainty is necessary to assure that the beam is monitored within the clear optical path. When the uncertainty is above a certain threshold the automated alignment operation is suspended and control of the beam is transferred to a human operator. This work describes our effort to quantify the uncertainty of measurement of the most common alignment beam.
C1 [Awwal, Abdul A. S.; Law, Clement; Ferguson, S. Walter] Lawrence Livermore Natl Lab, Natl Ignit Facil, Livermore, CA 94551 USA.
RP Awwal, AAS (reprint author), Lawrence Livermore Natl Lab, Natl Ignit Facil, Livermore, CA 94551 USA.
NR 8
TC 3
Z9 3
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6843-7
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6695
BP R6950
EP R6950
DI 10.1117/12.740149
PG 6
WC Computer Science, Artificial Intelligence; Computer Science, Information
   Systems; Optics; Imaging Science & Photographic Technology
SC Computer Science; Optics; Imaging Science & Photographic Technology
GA BGY50
UT WOS:000251356900021
ER

PT S
AU Saito, TT
AF Saito, Theodore T.
BE Saito, TT
   Lehrfeld, D
   DeWeert, MJ
TI Homeland security R&D budgets and conference overview - art. no. 654003
SO Optics and Photonics in Global Homeland Security III
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optics and Photonics in Global Homeland Security III
CY APR 10-12, 2007
CL Orlando, FL
SP SPIE
DE homeland security R&D budgets; federal budget process; drinking water
   security; border security; transportation security; port and harbor
   security; health security; non-intrusive inspection technologies; SPIE
   global homeland security technical group
AB Homeland Security R&D budgets will be summarized with an emphasis on the FY 2007 and comparisons to FY 2006 and the proposed FY 2008 budget. A summary of the federal budget process is given with insights into the specific omnibus bill funding FY 2007 for most of the federal budget and the omnibus bill's impact on organizations included in the American Competitiveness Initiative. Projections for FY 2008 Homeland Security Research, as analyzed by AAAS, show that similar to 80% of R&D funding is outside the Department of Homeland Security. An overview of the conference includes insights into the, Drinking Water Security, Border Security, Transportation Security (including an update from the MANPADS program office), Port and Harbor Security, Health Security, and Non-Intrusive Inspection Technologies sessions.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Saito, TT (reprint author), Lawrence Livermore Natl Lab, POB 808 L-151, Livermore, CA 94551 USA.
NR 5
TC 0
Z9 0
U1 1
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6662-4
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6540
BP 54003
EP 54003
AR 654003
DI 10.1117/12.722303
PG 8
WC Optics
SC Optics
GA BGK09
UT WOS:000247873500001
ER

PT S
AU Gordon, SP
   Chumfong, I
   Edwards, DM
   Gleason, NJ
   West, T
   Yang, L
AF Gordon, Susanna P.
   Chumfong, Isabelle
   Edwards, Donna M.
   Gleason, Nathaniel J.
   West, Todd
   Yang, Lynn
BE Saito, TT
   Lehrfeld, D
   DeWeert, MJ
TI Biological and chemical terrorism scenarios and implications for
   detection systems needs - art. no. 654015
SO Optics and Photonics in Global Homeland Security III
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optics and Photonics in Global Homeland Security III
CY APR 10-12, 2007
CL Orlando, FL
SP SPIE
DE biological; chemical; scenario; terrorism; detection; homeland;
   security; defense; analysis; simulation
ID INHALATIONAL ANTHRAX
AB Terrorists intent on causing many deaths and severe disruption to our society could, in theory, cause hundreds to tens of thousands of deaths and significant contamination of key urban facilities by using chemical or biological (CB) agents. The attacks that have occurred to date, such as the 1995 Aum Shinrikyo CB attacks and the 2001 anthrax letters, have been very small on the scale of what is possible. In order to defend against and mitigate the impacts of large-scale terrorist attacks, defensive systems for protection of urban areas and high-value facilities from biological and chemical threats have been deployed. This paper reviews analyses of such scenarios and of the efficacy of potential response options, discusses defensive systems that have been deployed and detectors that are being developed, and finally outlines the detection systems that will be needed for improved CB defense in the future. Sandia's collaboration with San Francisco International Airport on CB defense will also be briefly reviewed, including an overview of airport facility defense guidelines produced in collaboration with Lawrence Berkeley National Laboratory. The analyses that will be discussed were conducted by Sandia National Laboratories' Systems Studies Department in support of the U.S. Department of Homeland Security (DHS) Science and Technology Directorate, and include quantitative analyses utilizing simulation models developed through close collaboration with subject matter experts, such as public health officials in urban areas and biological defense experts.
C1 Sandia Natl Labs, Livermore, CA 94551 USA.
RP Gordon, SP (reprint author), Sandia Natl Labs, POB 969, Livermore, CA 94551 USA.
NR 10
TC 0
Z9 0
U1 1
U2 8
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6662-4
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6540
BP 54015
EP 54015
AR 654015
DI 10.1117/12.719869
PG 11
WC Optics
SC Optics
GA BGK09
UT WOS:000247873500026
ER

PT S
AU Dougherty, GM
   Clague, DS
   Miles, RR
AF Dougherty, George M.
   Clague, David S.
   Miles, Robin R.
BE Saito, TT
   Lehrfeld, D
   DeWeert, MJ
TI Field-capable biodetection devices for homeland security missions - art.
   no. 654016
SO Optics and Photonics in Global Homeland Security III
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optics and Photonics in Global Homeland Security III
CY APR 10-12, 2007
CL Orlando, FL
SP SPIE
DE biodetection; biosensor; homeland security; autonomous; microfluidic;
   sample processing; sample preparation; requirements; diagnostics
ID AUTONOMOUS DETECTION; AGENTS
AB Biodetection instrumentation that is capable of functioning effectively outside the controlled laboratory environment is critical for the detection of health threats, and is a crucial technology for Health Security. Experience in bringing technologies from the basic research laboratory to integrated fieldable instruments suggests lessons for the engineering of these systems. This overview will cover several classes of such devices, with examples from systems developed for homeland security missions by Lawrence Livermore National Laboratory (LLNL). Recent trends suggest that front-end sample processing is becoming a critical performance-determining factor for many classes of fieldable biodetection devices. This paper introduces some results of a recent study that was undertaken to assess the requirements and potential technologies for next-generation integrated sample processing.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Dougherty, GM (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave,L-222, Livermore, CA 94551 USA.
NR 15
TC 2
Z9 2
U1 0
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6662-4
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6540
BP 54016
EP 54016
AR 654016
DI 10.1117/12.719841
PG 10
WC Optics
SC Optics
GA BGK09
UT WOS:000247873500027
ER

PT S
AU Boye, RR
   Kernme, SA
   Nandy, P
   Washburn, CM
   Sarnora, S
   Dirk, SM
   Wheeler, DR
AF Boye, R. R.
   Kernme, S. A.
   Nandy, P.
   Washburn, C. M.
   Sarnora, S.
   Dirk, S. M.
   Wheeler, D. R.
BE Saito, TT
   Lehrfeld, D
   DeWeert, MJ
TI Remote optical interrogation of radiation sensitive infrared polarizers
   - art. no. 65400C
SO Optics and Photonics in Global Homeland Security III
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optics and Photonics in Global Homeland Security III
CY APR 10-12, 2007
CL Orlando, FL
SP SPIE
DE conductive polymer; subwavelength grating; polarization; infrared;
   microstructure devices
ID POLYANILINE; POLYPYRROLE; POLYMER; ARRAYS; FILMS
AB Remote detection of radiation is a difficult problem due to the l/r(2) fall-off. Recent advances in polymer research and nanoscale fabrication methods along with advances in optical polarimetric remote sensing systems suggest a solution. The basic device uses a micro-wiregrid infrared polarizer fabricated in conductive polymer. When the polymer is exposed to hard radiation, its conductivity will be affected and the polarization properties of the device will change in a corresponding manner. This change in polarization properties can be determined by optically interrogating the device, possibly from a remote location. We will report on the development of a radiation-sensitive passive dosimeter polymer with very low optical visibility. Progress on material development, lithographic fabrication and optical characterization will be presented.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Boye, RR (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 27
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6662-4
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6540
BP C5400
EP C5400
AR 65400C
DI 10.1117/12.720014
PG 9
WC Optics
SC Optics
GA BGK09
UT WOS:000247873500006
ER

PT S
AU Mark, JA
   Green, LD
   Deshpande, A
   White, PS
AF Mark, Jacob A.
   Green, Lance D.
   Deshpande, Alina
   White, P. Scott
BE Saito, TT
   Lehrfeld, D
   DeWeert, MJ
TI System integration and development for biological warfare agent
   surveillance - art. no. 65401D
SO Optics and Photonics in Global Homeland Security III
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optics and Photonics in Global Homeland Security III
CY APR 10-12, 2007
CL Orlando, FL
SP SPIE
DE mOL-PCR; detection; genomics; markers; system chokepoints; multiplexed
   analyses; data density; DNA ligation; Luminex; genotyping
ID MICROARRAY-BASED DETECTION; POLYMERASE-CHAIN-REACTION; TIME QUANTITATIVE
   PCR; DNA MICROARRAYS; AMPLIFICATION; PATHOGENS; LIGASE; TECHNOLOGY;
   GENOME; PROBES
AB A wide variety of technical needs exist for surveillance, monitoring, identifying, or detecting pathogens with potential use as biological terrorism or warfare agents. Because the needs vary greatly among diverse applications, tailored systems are needed that meet performance, information, and cost requirements. A systems perspective allows developers to identify chokepoints for each application, and focus R&D investments on the limiting factors. Surveillance and detection systems are comprised of three primary components: information (markers), chemistries (assays), and instrumentation for "readout". Careful consideration of these components within the context of each application will allow for increases in efficiency and performance not generally realized when researchers focus on a single component in isolation. In fact, many application requirements can be met with simple novel combinations of existing technologies, without the need for huge investments in basic research. Here we discuss some of the key parameters for surveillance, detection, and identification of biothreat agents, and provide examples of focused development that addresses key bottlenecks, and greatly improve system performance.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Mark, JA (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
NR 41
TC 2
Z9 2
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6662-4
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6540
BP D5401
EP D5401
AR 65401D
DI 10.1117/12.722553
PG 12
WC Optics
SC Optics
GA BGK09
UT WOS:000247873500028
ER

PT S
AU Bolotnikov, AE
   Camarda, GS
   Hossain, A
   Cui, Y
   James, RB
AF Bolotnikov, A. E.
   Camarda, G. S.
   Hossain, A.
   Cui, Y.
   James, R. B.
BE Saito, TT
   Lehrfeld, D
   DeWeert, MJ
TI Effectiveness of electrostatic shielding and electronic subtraction to
   correct for the hole trapping in CdZnTe semiconductor detectors - art.
   no. 65401F
SO Optics and Photonics in Global Homeland Security III
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optics and Photonics in Global Homeland Security III
CY APR 10-12, 2007
CL Orlando, FL
SP SPIE
DE CdZnTe; gamma ray detectors; weighting potential
ID GAMMA-RAY DETECTORS; ENERGY RESOLUTION; RADIATION DETECTOR; CHARGE;
   SPECTROMETERS
AB CdZnTe (CZT) is a very promising material for nuclear-radiation detectors. CZT detectors operate at ambient temperatures and offer high detection efficiency and excellent energy resolution, placing them ahead of high-purity Ge for those applications where cryogenic cooling is problematic. The progress achieved in CZT detectors over the past decade is founded on the developments of robust detector designs and readout electronics, both of which helped to overcome the effects of carrier trapping.
   Because the holes have low mobility, only electrons can be used to generate signals in thick CZT detectors, so one must account for the variation of the output signal versus the locations of the interaction points. To obtain high spectral resolution, the detector's design should provide a means to eliminate this dependence throughout the entire volume of the device. In reality, the sensitive volume of any ionization detector invariably has two regions. In the first, adjacent to the collecting electrode, the amplitude of the output signal rapidly increases almost to its maximum as the interaction point is located farther from the anode; in the rest of the volume, the output signal remains nearly constant. Thus, the quality of CZT detector designs can be characterized based on the magnitude of the signals variations in the drift region and the ratio between the volumes of the drift and induction regions. The former determines the "geometrical" width of the photopeak, i.e., the line width that affects the total energy resolution and is attributed to the device's geometry when all other factors are neglected. The latter determines the photopeak efficiency and the area under the continuum in the pulse-height spectra.
   In this work, we describe our findings from systematizing different designs of CZT detectors and evaluating their performance based on these two criteria.
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Bolotnikov, AE (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
NR 34
TC 0
Z9 0
U1 2
U2 4
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6662-4
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6540
BP F5401
EP F5401
AR 65401F
DI 10.1117/12.717681
PG 11
WC Optics
SC Optics
GA BGK09
UT WOS:000247873500029
ER

PT S
AU Blackburn, BW
   Johnson, JT
   Watson, SM
   Chichester, DL
   Jones, JL
   Ruddy, FH
   Seidel, JG
   Flammang, RW
AF Blackburn, Brandon W.
   Johnson, James T.
   Watson, Scott M.
   Chichester, David L.
   Jones, James L.
   Ruddy, Frank H.
   Seidel, John G.
   Flammang, Robert W.
BE Saito, TT
   Lehrfeld, D
   DeWeert, MJ
TI Fast digitization and discrimination of prompt neutron and photon
   signals using a novel silicon carbide detector - art. no. 65401J
SO Optics and Photonics in Global Homeland Security III
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optics and Photonics in Global Homeland Security III
CY APR 10-12, 2007
CL Orlando, FL
SP SPIE
DE SNM; active inspection; silicon carbide; digitization; pulse shape
   discrimination
AB Current requirements of some Homeland Security active interrogation projects for the detection of Special Nuclear Material (SNM) necessitate the development of faster inspection and acquisition capabilities. In order to do so, fast detectors which can operate during and shortly after intense interrogation radiation flashes are being developed. Novel silicon carbide (SiC) semiconductor Schottky diodes have been utilized as robust neutron and photon detectors in both pulsed photon and pulsed neutron fields and are being integrated into active inspection environments to allow exploitation of both prompt and delayed emissions. These detectors have demonstrated the capability of detecting both photon and neutron events during intense photon flashes typical of an active inspection environment. Beyond the inherent insensitivity of SiC to gamma radiation, fast digitization and processing has demonstrated that pulse shape discrimination (PSD) in combination with amplitude discrimination can ftirther suppress unwanted gamma signals and extract fast neutron signatures. Usable neutron signals have been extracted from mixed radiation fields where the background has exceeded the signals of interest by > 1000:1.
C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Blackburn, BW (reprint author), Idaho Natl Lab, 2525 N Fremont Ave MS-2802, Idaho Falls, ID 83415 USA.
RI Johnson, James/B-9689-2017
OI Johnson, James/0000-0002-3434-4413
NR 5
TC 0
Z9 0
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6662-4
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6540
BP J5401
EP J5401
AR 65401J
DI 10.1117/12.722921
PG 7
WC Optics
SC Optics
GA BGK09
UT WOS:000247873500031
ER

PT S
AU Chichester, DL
   Blackburn, BW
   Johnson, JT
   Watson, SM
AF Chichester, David L.
   Blackburn, Brandon W.
   Johnson, James T.
   Watson, Scott M.
BE Saito, TT
   Lehrfeld, D
   DeWeert, MJ
TI Photon dosimetry using plastic scintillators in pulsed radiation fields
   - art. no. 65401K
SO Optics and Photonics in Global Homeland Security III
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optics and Photonics in Global Homeland Security III
CY APR 10-12, 2007
CL Orlando, FL
SP SPIE
DE plastic scintillator; bremsstrahlung; dosimetry; pulsed radiation
ID ENERGY BEAM DOSIMETRY; DETECTORS; SYSTEM
AB Simulations and experiments have been carried out to explore using a plastic scintillator as a dosimetry probe in the vicinity of a pulsed bremsstrahlung source in the range 4 to 20 MeV. Taking advantage of the tissue-equivalent properties of this detector in conjunction with the use of a fast digital signal processor near real-time dosimetry was shown to be possible. The importance of accounting for a broad energy electron beam in bremsstrahlung production, and photon scattering and build-up, in correctly interpreting dosimetry results at long stand-off distances is highlighted by comparing real world experiments with ideal geometry simulations. Close agreement was found between absorbed energy calculations based upon spectroscopic techniques and calculations based upon signal integration, showing a ratio between 10 MeV absorbed dose to 12 MeV absorbed dose of 0.58 at a distance of 91.4 m from the accelerator. This is compared with an idealized model simulation with a monoenergetic electron beam and without scattering, where the ratio was 0.46.
C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Chichester, DL (reprint author), Idaho Natl Lab, 2525 N Freemont Ave, Idaho Falls, ID 83415 USA.
RI Johnson, James/B-9689-2017
OI Johnson, James/0000-0002-3434-4413
NR 18
TC 0
Z9 0
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6662-4
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6540
BP K5401
EP K5401
AR 65401K
DI 10.1117/12.722929
PG 10
WC Optics
SC Optics
GA BGK09
UT WOS:000247873500032
ER

PT S
AU Reijonen, J
   Andresen, N
   Gicquel, F
   Gough, R
   King, M
   Kalvas, T
   Leung, KN
   Lou, TP
   Vainionpaa, H
   Antolak, A
   Morse, D
   Doyle, B
   Miller, G
   Piestrup, M
AF Reijonen, J.
   Andresen, N.
   Gicquel, F.
   Gough, R.
   King, M.
   Kalvas, T.
   Leung, K.-N.
   Lou, T.-P.
   Vainionpaa, H.
   Antolak, A.
   Morse, D.
   Doyle, B.
   Miller, G.
   Piestrup, M.
BE Saito, TT
   Lehrfeld, D
   DeWeert, MJ
TI Development of advanced Neutron/Gamma generators for Imaging and active
   interrogation applications - art. no. 65401P
SO Optics and Photonics in Global Homeland Security III
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Optics and Photonics in Global Homeland Security III
CY APR 10-12, 2007
CL Orlando, FL
SP SPIE
DE neutron generator; gamma generator; low energy accelerator; neutron
   interrogation
AB We report here on the development of neutron and photon sources for use in imaging and active interrogation applications, where there is a growing urgency for more advanced inter-rogation tools. These devices include high yield D-D, D-T and T-T fusion reaction based neutron generators and also low energy nuclear reaction based high-energy gamma generators. One common feature in these various devices is the use of a high-efficiency, RF-induction discharge ion source. This discharge method provides high plasma density for high output current, high atomic species from molecular gases for high efficiency neutron or gamma generation and long lifetime. Predictable discharge characteristics of these plasma generators allow accurate modeling for both the beam dynamics and for the heat loads at the target spot. Current status of the neutron and gamma generator development with experimental data will be presented.
C1 Lawrence Berkeley Natl Lab, Berkeley, CA USA.
RP Reijonen, J (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA USA.
NR 17
TC 2
Z9 2
U1 1
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6662-4
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6540
BP P5401
EP P5401
AR 65401P
DI 10.1117/12.724783
PG 12
WC Optics
SC Optics
GA BGK09
UT WOS:000247873500036
ER

PT J
AU Dolling, G
   Wegener, M
   Soukoulis, CM
   Linden, S
AF Dolling, G.
   Wegener, M.
   Soukoulis, C. M.
   Linden, S.
TI Negative-index metamaterial at 780 nm wavelength
SO OPTICS LETTERS
LA English
DT Article
ID REFRACTION
AB We further miniaturize a recently established silver-based negative-index metamaterial design. By comparing transmittance, reflectance, and phase-sensitive time-of-flight experiments with theory, we infer a real part of the refractive index of -0.6 at a 780 nm wavelength-which is visible in the laboratory. (c) 2006 Optical Society of America.
C1 Univ Karlsruhe, TH, Inst Angew Phys, D-76131 Karlsruhe, Germany.
   Univ Karlsruhe, TH, CFN, DFG, D-76131 Karlsruhe, Germany.
   Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA.
   Iowa State Univ Sci & Technol, Dept Phys & Astron, Ames, IA 50011 USA.
   Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76021 Karlsruhe, Germany.
   FORTH, Inst Elect Struct & Laser, Iraklion, Crete, Greece.
   Univ Crete, Dept Mat Sci & Technol, Iraklion, Crete, Greece.
RP Dolling, G (reprint author), Univ Karlsruhe, TH, Inst Angew Phys, D-76131 Karlsruhe, Germany.
EM gunnar.dolling@physik.uni-karlsruhe.de
RI Soukoulis, Costas/A-5295-2008; Wegener, Martin/S-5456-2016
NR 13
TC 542
Z9 566
U1 12
U2 128
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
EI 1539-4794
J9 OPT LETT
JI Opt. Lett.
PD JAN 1
PY 2007
VL 32
IS 1
BP 53
EP 55
DI 10.1364/OL.32.000053
PG 3
WC Optics
SC Optics
GA 119TQ
UT WOS:000243036900017
PM 17167581
ER

PT J
AU Li, YL
   Crowell, R
AF Li, Yuelin
   Crowell, Robert
TI Shortening of a laser pulse with a self-modulated phase at the focus of
   a lens
SO OPTICS LETTERS
LA English
DT Article
ID FRONT DISTORTION; DAMAGE
AB We found that, at the focus of a chromatic lens, a laser pulse with a self-modulated phase can be shortened due to the radial dependence of the group delay imposed by the lens. Normally, this group delay stretches a short pulse into a long pulse by spreading the arrival time of the pulse at the focus. However, for a pulse with a self-modulated phase, it causes the fields with different phases to overlap, thus resulting in destructive interference that shortens the pulse. (c) 2006 Optical Society of America
C1 Argonne Natl Lab, Accelerator Syst Div, Argonne, IL 60439 USA.
   Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
RP Li, YL (reprint author), Argonne Natl Lab, Accelerator Syst Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM ylli@aps.anl.gov
OI Li, Yuelin/0000-0002-6229-7490
NR 15
TC 5
Z9 5
U1 0
U2 1
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD JAN 1
PY 2007
VL 32
IS 1
BP 93
EP 95
DI 10.1364/OL.32.000093
PG 3
WC Optics
SC Optics
GA 119TQ
UT WOS:000243036900031
PM 17167595
ER

PT S
AU Starke, EM
   Smoot, JC
   Wu, JH
   Liu, WT
   Chandler, D
   Stahl, DA
AF Starke, E. Michelle
   Smoot, James C.
   Wu, Jer-Horng
   Liu, Wen-Tso
   Chandler, Darrell
   Stahl, David A.
BE Malamud, D
   Niedbala, RS
TI Saliva-based diagnostics using 16S rRNA microarrays and microfluidics
SO ORAL-BASED DIAGNOSTICS
SE Annals of the New York Academy of Sciences
LA English
DT Article; Proceedings Paper
CT Conference on Oral-Based Diagnostics
CY OCT 10-13, 2006
CL Lake Lanier Isl, GA
SP Drager Safety, Drager USA, Int Diagnost Syst Corp, K Street Associates LLC, Lehigh Univ, NIDCR, NY Univ Coll Dent, OraSure Technologies Inc, Salimetrics LLC, StatSure Diagnost Syst
DE microarrays; saliva; microbial ecology; microfluidics
ID NONEQUILIBRIUM DISSOCIATION APPROACH; GEL-IMMOBILIZED OLIGONUCLEOTIDES;
   MICROBIAL-POPULATIONS; DNA; HYBRIDIZATION; MICROCHIPS; DISCRIMINATION;
   DUPLEXES; FRAGMENTATION; OPTIMIZATION
AB The development of a diagnostic system based on DNA microarrays for rapid identification and enumeration of microbial species in the oral cavity is described. This system uses gel-based microarrays with immobilized probes designed within a phylogenetic framework that provides for comprehensive microbial monitoring. Understanding the community structure in the oral cavity is a necessary foundation on which to understand the breadth and depth of different microbial communities in the oral cavity and their role in acute and systemic disease. Our ultimate goal is to develop a diagnostic device to identify individuals at high risk for oral disease, and thereby reduce its prevalence and therefore the economic burden associated with treatment. This article discusses recent improvements of our system in reducing diffusional constraints in order to provide more rapid and accurate measurements of the microbial composition of saliva.
C1 Univ Washington, Seattle, WA 98195 USA.
   Natl Univ Singapore, Singapore 117576, Singapore.
   Argonne Natl Lab, Argonne, IL 60439 USA.
   Akonni Biosyst Inc, New Market, MD 21774 USA.
RP Stahl, DA (reprint author), Univ Washington, 302 More Hall,Box 352700, Seattle, WA 98195 USA.
EM dastahl@u.washington.edu
RI Wu, Jer-Horng/B-5955-2009; Liu, Wen-Tso/C-8788-2011
OI Wu, Jer-Horng/0000-0003-4926-2995; Liu, Wen-Tso/0000-0002-8700-9803
FU NIAID NIH HHS [5R01AI059517]; NIDCR NIH HHS [U01 DE14955]
NR 50
TC 9
Z9 9
U1 0
U2 3
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN STREET, MALDEN 02148, MA USA
SN 0077-8923
BN 978-1-57331-661-3
J9 ANN NY ACAD SCI
JI Ann.NY Acad.Sci.
PY 2007
VL 1098
BP 345
EP 361
DI 10.1196/annals.1384.007
PG 17
WC Dentistry, Oral Surgery & Medicine; Medical Laboratory Technology;
   Multidisciplinary Sciences
SC Dentistry, Oral Surgery & Medicine; Medical Laboratory Technology;
   Science & Technology - Other Topics
GA BGC93
UT WOS:000246091500024
PM 17435141
ER

PT S
AU Herr, AE
   Hatch, AV
   Giannobile, WV
   Throckmorton, DJ
   Tran, HM
   Brennan, JS
   Singh, AK
AF Herr, Amy E.
   Hatch, Anson V.
   Giannobile, William V.
   Throckmorton, Daniel J.
   Tran, Huu M.
   Brennan, James S.
   Singh, Anup K.
BE Malamud, D
   Niedbala, RS
TI Integrated microfluidic platform for oral diagnostics
SO ORAL-BASED DIAGNOSTICS
SE ANNALS OF THE NEW YORK ACADEMY OF SCIENCES
LA English
DT Article; Proceedings Paper
CT Conference on Oral-Based Diagnostics
CY OCT 10-13, 2006
CL Lake Lanier Isl, GA
SP Drager Safety, Drager USA, Int Diagnost Syst Corp, K Street Associates LLC, Lehigh Univ, NIDCR, NY Univ Coll Dent, OraSure Technologies Inc, Salimetrics LLC, StatSure Diagnost Syst
DE microfluidics; periodontal disease; diagnostics; point-of-care; POC;
   immunoassay; lab-on-a-chip; saliva
ID ELECTROPHORESIS-BASED IMMUNOASSAYS; LINKED POLYACRYLAMIDE-GELS;
   PERIODONTAL WOUND REPAIR; CAPILLARY-ELECTROPHORESIS; ANALYSIS SYSTEM;
   HUMAN SALIVA; RHPDGF-BB; PROTEINS; CHIP; MICROCHIPS
AB While many point-of-care (POC) diagnostic methods have been developed for blood-borne analytes, development of saliva-based POC diagnostics is in its infancy. We have developed a portable microfluidic device for detection of potential biomarkers of periodontal disease in saliva. The device performs rapid microfluidic chip-based immunoassays (<3-10 min) with low sample volume requirements (10 mu L) and appreciable sensitivity (nM-pM). Our microfluidic method facilitates hands-free saliva analysis by integrating sample pretreatment (filtering, enrichment, mixing) with electrophoretic immunoassays to quickly measure analyte concentrations in minimally pretreated saliva samples. The microfluidic chip has been integrated with miniaturized electronics, optical elements, such as diode lasers, fluid-handling components, and data acquisition software to develop a portable, self-contained device. The device and methods are being tested by detecting potential biomarkers in saliva samples from patients diagnosed with periodontal disease. Our microchip-based analysis can readily be extended to detection of biomarkers of other diseases, both oral and systemic, in saliva and other oral fluids.
C1 Sandia Natl Labs, Biosyst Res Dept, Livermore, CA 94551 USA.
   Univ Michigan, Sch Dent, Ann Arbor, MI 48106 USA.
RP Singh, AK (reprint author), Sandia Natl Labs, Biosyst Res Dept, POB 969,MS 9292, Livermore, CA 94551 USA.
EM aksingh@sandia.gov
OI Herr, Amy/0000-0002-6906-2985; Giannobile, William/0000-0002-7102-9746
FU NIDCR NIH HHS [U01 DE014961, U01 DE014961-01, U01-DE014961]
NR 39
TC 29
Z9 30
U1 2
U2 16
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXEN, ENGLAND
SN 0077-8923
BN 978-1-57331-661-3
J9 ANN NY ACAD SCI
JI Ann.NY Acad.Sci.
PY 2007
VL 1098
BP 362
EP 374
DI 10.1196/annals.1384.004
PG 13
WC Dentistry, Oral Surgery & Medicine; Medical Laboratory Technology;
   Multidisciplinary Sciences
SC Dentistry, Oral Surgery & Medicine; Medical Laboratory Technology;
   Science & Technology - Other Topics
GA BGC93
UT WOS:000246091500025
PM 17435142
ER

PT S
AU Shinar, J
   Zhou, Z
   Cai, Y
   Shinar, R
AF Shinar, Joseph
   Zhou, Zhaoqun
   Cai, Yuankun
   Shinar, Ruth
BE Shinar, R
   Malliaras, GG
TI Recent developments in OLED-Based chemical and biological sensors - art.
   no. 665906
SO ORGANIC-BASED CHEMICAL AND BIOLOGICAL SENSORS
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Organic-based Chemical and Biological Sensors
CY AUG   28, 2007
CL San Diego, CA
SP SPIE
DE organic light-emitting device; OLED; photoluminescence; oxygen sensor;
   glucose sensor; lactate sensor; ethanol sensor; multianalyte sensor
ID LIGHT-EMITTING DEVICES; COMBINATORIAL FABRICATION; MULTIANALYTE
   IMMUNOASSAYS; EXCITATION SOURCE; DISSOLVED-OXYGEN; ARRAYS; GLUCOSE;
   ELECTROLUMINESCENCE; LAYER; FILMS
AB Recent developments in the structurally integrated OLED-based platform of luminescent chemical and biological sensors are reviewed. In this platform, an array of OLED pixels, which is structurally integrated with the sensing elements, is used as the photoluminescence (PL) excitation source. The structural integration is achieved by fabricating the OLED array and the sensing element on opposite sides of a common glass substrate or on two glass substrates that are attached back-to-back. As it does not require optical fibers, lens, or mirrors, it results in a uniquely simple, low-cost, and potentially rugged geometry. The recent developments on this platform include the following:
   (1) Enhancing the performance of gas-phase and dissolved oxygen sensors. This is achieved by (a) incorporating high-dielectric TiO2 nanoparticles in the oxygen-sensitive Pt and Pd octaethylporphyrin (PtOEP and PdOEP, respectively)doped polystyrene (PS) sensor films, and (b) embedding the oxygen-sensitive dyes in a matrix of polymer blends such as PS:polydimethylsiloxane (PDMS).
   (2) Developing sensor arrays for simultaneous detection of multiple serum analytes, including oxygen, glucose, lactate, and alcohol. The sensing element for each analyte consists of a PtOEP-doped PS oxygen sensor, and a solution containing the oxidase enzyme specific to the analyte. Each sensing element is coupled to two individually addressable OLED pixels and a Si photodiode photodetector (PD).
   (3) Enhancing the integration of the platform, whereby a PD array is also structurally integrated with the OLED array and sensing elements. This enhanced integration is achieved by fabricating an array of amorphous or nanocrystalline Si-based PDs, followed by fabrication of the OLED pixels in the gaps between these Si PDs.
C1 [Shinar, Joseph; Zhou, Zhaoqun; Cai, Yuankun] US DOE, Ames Lab, Ames, IA 50011 USA.
RP Shinar, J (reprint author), US DOE, Ames Lab, Ames, IA 50011 USA.
NR 31
TC 0
Z9 0
U1 4
U2 8
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6807-9
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6659
BP 65906
EP 65906
DI 10.1117/12.731775
PG 10
WC Chemistry, Analytical; Engineering, Electrical & Electronic; Materials
   Science, Coatings & Films; Optics
SC Chemistry; Engineering; Materials Science; Optics
GA BGZ38
UT WOS:000251493200003
ER

PT S
AU Cai, Y
   Shinar, R
   Zhou, Z
   Shinar, J
AF Cai, Yuankun
   Shinar, Ruth
   Zhou, Zhaoqun
   Shinar, Joseph
BE Shinar, R
   Malliaras, GG
TI OLED-based sensor array for simultaneous monitoring of multiple analytes
   - art. no. 665907
SO ORGANIC-BASED CHEMICAL AND BIOLOGICAL SENSORS
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Organic-based Chemical and Biological Sensors
CY AUG   28, 2007
CL San Diego, CA
SP SPIE
DE multianalyte sensor arrays; organic light emitting devices; OLEDs;
   dissolved oxygen sensor; glucose sensor; lactate sensor; ethanol sensor
ID MULTIANALYTE IMMUNOASSAYS; GLUCOSE; DEVICES; OXYGEN
AB A compact, photoluminescence (PL)-based sensor array, utilizing tris(quinolinolate) Al OLED pixels as the excitation sources, for sequential or simultaneous monitoring of dissolved oxygen (DO), glucose, lactate, and alcohol, is described. The DO is monitored through its effect on the PL lifetime of the oxygen-sensitive dye Pt octaethylporphyrin (PtOEP) embedded in a polystyrene film. The other analytes are monitored through their oxidation, catalyzed by an appropriate oxidase, which reduces the amount of DO in their vicinity. The OLED pixels are fabricated on a glass substrate; each pixel is typically 2x2 mm(2), with a 2 mm gap between the pixels. Two OLED pixels are associated with the detection of each of the analytes. The pixels are individually addressable, enabling consecutive detection of the different analytes within a few minutes utilizing a single photodetector (PD). Simultaneous detection is achieved by using an array of PDs. The OLED-based sensing array is compact and uniquely simple in its ease of fabrication and integration. Its performance attributes are comparable to those obtained for a single analyte using any excitation source. The potential of small-size, multi-color OLED pixel arrays for multianalyte detection is also discussed.
C1 [Cai, Yuankun; Zhou, Zhaoqun; Shinar, Joseph] US DOE, Ames Lab, Ames, IA 50011 USA.
RP Cai, Y (reprint author), US DOE, Ames Lab, Ames, IA 50011 USA.
NR 13
TC 0
Z9 0
U1 1
U2 4
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6807-9
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6659
BP 65907
EP 65907
DI 10.1117/12.735845
PG 8
WC Chemistry, Analytical; Engineering, Electrical & Electronic; Materials
   Science, Coatings & Films; Optics
SC Chemistry; Engineering; Materials Science; Optics
GA BGZ38
UT WOS:000251493200004
ER

PT J
AU Tremblay, AE
   Whittle, E
   Buist, PH
   Shanklin, J
AF Tremblay, Amy E.
   Whittle, Edward
   Buist, Peter H.
   Shanklin, John
TI Stereochemistry of Delta(4) dehydrogenation catalyzed by an ivy (Hedera
   helix) Delta(9) desaturase homolog
SO ORGANIC & BIOMOLECULAR CHEMISTRY
LA English
DT Article
ID CARRIER PROTEIN DESATURASE; STEAROYL-ACP DESATURASE; FATTY-ACIDS;
   SPODOPTERA-LITTORALIS; ENZYMATIC OXIDATION; SEX-PHEROMONE; RESOLUTION;
   NMR; STEREOSPECIFICITY; BIOSYNTHESIS
AB The stereochemistry of palmitoyl-ACP Delta(4) desaturase-mediated dehydrogenation has been examined by tracking the fate of deuterium atoms located on stereospecifically monodeuterated substrates-(4S)- and (4R)-[4-H-2(1)]-palmitoyl-ACP and (5S)- and (5R)-[5-H-2(1)]-palmitoyl-ACP. It was found that the introduction of the (Z)-double bond between C-4 and C-5 of a palmitoyl substrate occurs with pro-R enantioselectivity-a result which matches that obtained for a closely related homolog-castor stearoyl-ACP Delta(9) desaturase. These data show that despite the difference in regioselectivity between the two enzymes, the stereochemistry of hydrogen removal is conserved.
C1 Carleton Univ, Dept Chem, Ottawa, ON K1S 5B6, Canada.
   Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
RP Buist, PH (reprint author), Carleton Univ, Dept Chem, 1125 Colonel Dr, Ottawa, ON K1S 5B6, Canada.
NR 36
TC 9
Z9 9
U1 1
U2 3
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
   ENGLAND
SN 1477-0520
J9 ORG BIOMOL CHEM
JI Org. Biomol. Chem.
PY 2007
VL 5
IS 8
BP 1270
EP 1275
DI 10.1039/b617942h
PG 6
WC Chemistry, Organic
SC Chemistry
GA 153MO
UT WOS:000245439800019
PM 17406726
ER

PT J
AU Johnson, BJ
   Moore, KA
   Lehmann, C
   Bohlen, C
   Brown, TA
AF Johnson, Beverly J.
   Moore, Karen A.
   Lehmann, Charlotte
   Bohlen, Curtis
   Brown, Thomas A.
TI Middle to late Holocene fluctuations of C-3 andC(4) vegetation in a
   Northern New England Salt Marsh, Sprague Marsh, Phippsburg Maine
SO ORGANIC GEOCHEMISTRY
LA English
DT Article
ID STABLE CARBON-ISOTOPE; SEA-LEVEL RISE; ORGANIC-MATTER; PARTICULATE
   MATTER; COASTAL WETLANDS; USA; SEDIMENTS; LOUISIANA; ACCRETION; GULF
AB A 3.1 m sediment core was analyzed for stable carbon isotope composition of organic matter and higher plant leaf wax (HPLW) lipid biomarkers to determine Holocene shifts in C-3 (higher high marsh) and C-4 (low and/or high marsh) plant deposition at the Sprague River Salt Marsh, Phippsburg, Maine. The carbon isotope composition of the bulk sediment and the HPLW parallel each other throughout most of the core, suggesting that terrestrial plants are an important source of organic matter to the sediments, and diagenetic alteration of the bulk sediments is minimal. The current salt marsh began to form 2500 cal yr BP. Low and/or high C-4 marsh plants dominated deposition at 2000 cal yr BP, 700 cal yr BP, and for the last 200 cal yr BP. Expansion of higher high marsh C-3 plants occurred at 1300 and 600 cal yr BP. These major vegetation shifts result from a combination of changes in relative sea-level rise and sediment accumulation rates.
   Average annual carbon sequestration rates for the last 2500 years approximate 40 g C yr(-1) m(-2), and are in strong agreement with other values published for the Gulf of Maine. Given that Maine salt marshes cover an area of similar to 79 km, they represent an important component of the terrestrial carbon sink. More detailed isotopic and age records from a network of sediment cores at Sprague Marsh are needed to truly evaluate the long term changes in salt marsh plant communities and the impact of more recent human activity, including global warming, on salt marsh vegetation. (c) 2006 Elsevier Ltd. All rights reserved.
C1 Bates Coll, Dept Geol, Lewiston, ME 04240 USA.
   LLNL, Ctr Accelerator Mass Spectrometry, Livermore, CA 94551 USA.
RP Johnson, BJ (reprint author), Bates Coll, Dept Geol, Lewiston, ME 04240 USA.
EM bjohnso3@bates.edu
NR 39
TC 13
Z9 13
U1 2
U2 10
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0146-6380
J9 ORG GEOCHEM
JI Org. Geochem.
PY 2007
VL 38
IS 3
BP 394
EP 403
DI 10.1016/j.orggeochem.2006.06.006
PG 10
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 148AS
UT WOS:000245047500005
ER

PT S
AU Sapochak, LS
   Padmaperuma, AB
   Vecchi, PA
   Cai, XY
   Burrows, PE
AF Sapochak, Linda S.
   Padmaperuma, Asanga B.
   Vecchi, Paul A.
   Cai, Xiuyu
   Burrows, Paul E.
BE Kafafi, ZH
   So, F
TI Designing organic phosphine oxide host materials using heteroaromatic
   building blocks: Inductive effects on electroluminescence - art. no.
   665506
SO ORGANIC LIGHT EMITTING MATERIALS AND DEVICES XI
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Organic Light Emitting Materials and Devices XI
CY AUG 26-29, 2007
CL San Diego, CA
SP SPIE
DE phosphine oxide; FIrpic; electrophosphorescence; dibenzothiophene;
   dibenzofuran; carbazole
ID ELECTROPHOSPHORESCENCE; CARBAZOLE; EFFICIENT; EMISSION
AB Phosphine oxide substitution of small molecules with high triplet exciton energies allows development of vacuum sublimable, electron transporting host materials for blue OLEDs. Heteroaromatic building blocks (carbazole, dibenzofuran and dibenzothiophene) with E-T similar to 3 eV were incorporated into phosphine oxide (PO) structures. External quantum efficiencies (EQEs) at lighting brightness (i.e., 800 cd/m(2)) reached as high as 9.8% at 5.2V for OLEDs using the heteroaromatic PO hosts doped with the sky blue phosphor, iridium(III)bis(4,6-(di-fluorophenyl)-pyridinato-N,C-2,C-) picolinate (FIrpic). Comparing device properties at a similar current density (i.e., J = 13 mA/cm(2))) showed the dibenzothiophene-bridged PO compound exhibits the highest EQEs and lowest operating voltages at all phosphor dopant levels. These results are explained with respect to the effects of the inductive phosphine oxide substituents on electrochemical, photophysical and electroluminescence properties of the substituted heteroaromatic building blocks.
C1 [Sapochak, Linda S.; Padmaperuma, Asanga B.; Vecchi, Paul A.; Cai, Xiuyu; Burrows, Paul E.] Pacific NW Natl Lab, Div Mat Sci, Energy Sci & Technol Directorate, Richland, WA 99352 USA.
RP Sapochak, LS (reprint author), Pacific NW Natl Lab, Div Mat Sci, Energy Sci & Technol Directorate, Richland, WA 99352 USA.
NR 19
TC 17
Z9 17
U1 1
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6803-1
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6655
BP 65506
EP 65506
DI 10.1117/12.740970
PG 11
WC Materials Science, Multidisciplinary; Optics
SC Materials Science; Optics
GA BHH07
UT WOS:000253181700004
ER

PT S
AU Gan, ZQ
   Tian, Y
   Lynch, DW
   Kang, JH
   Park, QH
   Shinar, J
AF Gan, Z. Q.
   Tian, Y.
   Lynch, D. W.
   Kang, Ji-hun
   Park, Q-Han
   Shinar, J.
BE Kafafi, ZH
   So, F
TI Spectrally narrowed edge emission from leaky waveguide modes in OLEDs -
   art. no. 66550K
SO ORGANIC LIGHT EMITTING MATERIALS AND DEVICES XI
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Organic Light Emitting Materials and Devices XI
CY AUG 26-29, 2007
CL San Diego, CA
SP SPIE
ID AMPLIFIED SPONTANEOUS EMISSION; LIGHT-EMITTING DEVICES; SOLID-STATE
   LASERS; THIN-FILMS; POLYMER; EXCITATION; INJECTION; CATHODE; DIODES;
   GAIN
AB A dramatic spectral line narrowing of the. edge-emission, at room temperature, from tris(quinolinolate) Al (Alq(3)), N,N'-diphenyl-N,N'-bis(1-naphthylphenyl)-1,1'-biphenyl-4,4'-diamine (NPD), 4,4'-bis(2,2'-diphenyl- vinyl)-1,1'-biphenyl (DPVBi), and some guest-host small molecular OLEDs, fabricated on ITO-coated glass, is described. In all but the DPVBi OLEDs, the narrowed emission band emerges above a threshold thickness of the emitting layer, and narrows down to a full width at half maximum of only 5 - 10 nm. The results demonstrate that this narrowed emission is due to irregular waveguide modes that leak from the ITO to the glass substrate at a grazing angle. While measurements of variable stripe length ( devices exhibit an apparent weak optical, gain, there is no observable threshold current or bias associated with this spectral narrowing. It is suspected that the apparent weak optical gain is due to misalignment of the axis of the waveguided mode and the axis of the collection lens of the probe, but it is not clear if such a misalignment can account for the for the observed evolution of the edge emission spectra with l.
C1 [Gan, Z. Q.; Tian, Y.; Lynch, D. W.; Shinar, J.] Iowa State Univ Sci & Technol, Ames Lab, USDOE, Ames, IA 50011 USA.
RP Gan, ZQ (reprint author), Iowa State Univ Sci & Technol, Ames Lab, USDOE, Ames, IA 50011 USA.
NR 25
TC 0
Z9 0
U1 0
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6803-1
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6655
BP K6550
EP K6550
DI 10.1117/12.739247
PG 15
WC Materials Science, Multidisciplinary; Optics
SC Materials Science; Optics
GA BHH07
UT WOS:000253181700014
ER

PT S
AU Crone, BK
   Campbell, IH
   Smith, DL
AF Crone, B. K.
   Campbell, I. H.
   Smith, D. L.
BE Kafafi, ZH
   So, F
TI The role of Isoelectronic dopants in organic light emitting diodes
SO ORGANIC LIGHT EMITTING MATERIALS AND DEVICES XI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Organic Light Emitting Materials and Devices XI
CY AUG 26-29, 2007
CL San Diego, CA
SP SPIE
DE dopant; OLED; transport; injection; efficiency
ID OHMIC HOLE INJECTION; ELECTROPHOSPHORESCENCE; FULLERENES; EFFICIENCY;
   POLYMERS; DEVICES
AB Power efficiency is an important parameter for all OLEDs, and is particularly critical for lighting applications. To maximize the power efficiency one must optimize charge injection, carrier transport, and radiative quantum efficiency, while minimizing energy losses. In this work we discuss how isoelectronic dopants can be used to address these problems. It can be difficult to produce efficient electrical contacts, particularly to large energy gap organic materials, and thus the contacts often limit the performance and stability of OLEDs. Recent results by several groups have attributed improved hole injection in poly (9,9' dioctylfluorene) [PFO] based LEDs to charge trapping, but the origin of the traps is unknown. In order to understand the role of traps in improving injection we studied poly[2-methoxy, 5-(2'-methyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) devices with C-60 molecules at the anode to improve hole injection. Isoelectronic dopants are used widely as recombination centers in organic light emitting diodes (OLEDs). In these systems one wants to maximize quantum efficiency by effectively trapping charges on the emitting dopants, while at the same time maximizing power efficiency by maintaining good charge transport. An understanding of the influence of the depth of the dopant on charge capture, and charge transport will aid in optimizing doped organic LEDs. We have looked at the OLED system consisting of the polymer PFO, and the organometallic molecule PhqIr. We show that PhqIr acts as a shallow hole trap in PFO, and that the charge transport and luminescence properties of this system are described by quasi-equilibrium statistics.
C1 [Crone, B. K.; Campbell, I. H.; Smith, D. L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Crone, BK (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM bcrone@lanl.gov
NR 24
TC 0
Z9 0
U1 1
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6803-1
J9 PROC SPIE
PY 2007
VL 6655
AR 665519
DI 10.1117/12.732079
PG 9
WC Materials Science, Multidisciplinary; Optics
SC Materials Science; Optics
GA BHH07
UT WOS:000253181700029
ER

PT S
AU Boye, RR
   Washburn, CM
   Samora, S
   Dirk, SM
   Wheeler, DR
   Kemme, SA
   Thomas, ML
AF Boye, R. R.
   Washburn, C. M.
   Samora, S.
   Dirk, S. M.
   Wheeler, D. R.
   Kemme, S. A.
   Thomas, M. L.
BE Grote, JG
   Kajzar, F
   Kim, N
TI Submicron patterning of conductive polymers for use in infrared
   polarizers - art. no. 64700X
SO Organic Photonic Materials and Devices IX
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Organic Photonic Materials and Devices IX
CY JAN 21-24, 2007
CL San Jose, CA
SP SPIE
DE conductive polymer; subwavelength grating; polarization; infrared;
   microstructure devices
ID POLYPYRROLE; PYRROLE; SILICON; ARRAYS; FILMS
AB Conductive polymers have become an extremely useful class of materials for many optical applications. Additionally, advanced fabrication methods have led to the development of metal based micro-wiregrid polarizers utilizing submicron features. Adapting these fabrication approaches for use with polymer materials leads to optical polarizers with unique properties. The patterning of conductive polymers with the small features required for wiregrid polarizers leads to several challenges. First, the deposition of the polymer must provide a layer thick enough to provide a polarizer with a useful extinction ratio that also has high conductivity and environmental stability. Two deposition approaches have been investigated, spin coating and electrochemical growth, and results of this work will be presented. Also, the polymers considered here are not compatible with basic photoresist processes. Various tactics have been examined to overcome this difficulty including the use of hard bakes of the polymer, protective overcoats and patterned growth. The adaptations required for successfully patterning the polymer will be reviewed. Finally, fabricated devices will be shown and their optical characterization presented.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Boye, RR (reprint author), Sandia Natl Labs, Albuquerque, NM 87185 USA.
NR 23
TC 0
Z9 0
U1 0
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6583-2
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6470
BP X4700
EP X4700
AR 64700X
DI 10.1117/12.701351
PG 9
WC Materials Science, Multidisciplinary; Optics
SC Materials Science; Optics
GA BGA92
UT WOS:000245837300021
ER

PT B
AU Cannon, W
   Webb-Robertson, BJ
AF Cannon, William
   Webb-Robertson, Bobbie-Jo
BE Altman, RB
   Dunker, AK
   Hunter, L
   Murray, T
   Klein, TE
TI Computational proteomics: High-throughput analysis for systems biology
SO Pacific Symposium on Biocomputing 2007
LA English
DT Proceedings Paper
CT 13th Pacific Symposium on Biocomputing (PSB)
CY JAN 03-07, 2007
CL Maui, HI
ID TANDEM MASS-SPECTROMETRY; AMINO-ACID-SEQUENCES; PEPTIDE IDENTIFICATION;
   PROTEIN COMPLEXES; DATABASE SEARCH; INFORMATION; ALGORITHM; SPECTRA;
   NETWORK; MS/MS
AB High-throughput proteomics is a rapidly developing field that offers the global profiling of proteins from a biological system. These high-throughput technological advances are fueling a revolution in biology, enabling analyses at the scale of entire systems (e.g., whole cells, tumors, or environmental communities). However, simply identifying the proteins in a cell is insufficient for understanding the underlying complexity and operating mechanisms of the overall system. Systems level investigations generating large-scale global data are relying more and more on computational analyses, especially in the field of proteomics.
C1 Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Cannon, W (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
NR 19
TC 0
Z9 0
U1 0
U2 0
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE
BN 981-270-417-5
PY 2007
BP 403
EP 408
PG 6
WC Biochemistry & Molecular Biology; Computer Science, Interdisciplinary
   Applications; Engineering, Biomedical
SC Biochemistry & Molecular Biology; Computer Science; Engineering
GA BFX58
UT WOS:000245296300038
ER

PT S
AU Morfin, JG
AF Morfin, Jorge G.
BE Valdez, HC
   Perez, MA
   DOlivo, JC
TI The Fermilab main injector neutrino program
SO Particles and Fields
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 6th Latin American Symposium on High Energy Physics/12th Mexican School
   of Particles and Fields
CY NOV 01-08, 2006
CL Puerto Vallarta, MEXICO
SP Ctr Investigac & Estudios Avanzados, Ctr Latinoamericano Fis, Consefo Nacl Ciencia & Tecnol, Div Particulas & Campos SMF, Dept Energy, UNAM, Inst Ciencias Nucl, Int Ctr Theoret Phys, BUAP, Inst Fis, UASLP, Inst Fis, UNAM, Inst Fis, UMSNH, Inst Fis & Matemat, BUAP, Fac Ciencias Fisico Matemat, Natl Sci Fdn, Univ Guanajuato, Inst Fis, Univ Autonoma Metropolitana Iztapalapa, Univ Guadalajara, Acad Mexicana Ciencias
DE neutrino; scattering; oscillation
AB The NuMI Facility at Fermilab provides an extremely intense beam of neutrinos making it an ideal place for the study of neutrino oscillations as well as high statistics (anti)neutrino-nucleon/nucleus scattering experiments. The MINOS neutrino oscillation v(mu) disappearance experiment is currently taking data and has published first results. The NOVA v, appearance experiment is planning to begin taking data at the start of the next decade. For the study of neutrino scattering, the MINERvA experiment at Fermilab is a collaboration of elementary-particle and nuclear physicists planning to use a fully active fine-grained solid scintillator detector. The overall goals of the experiment are to measure absolute exclusive cross-sections, nuclear effects in nu - A interactions, a systematic study of the resonance-DIS transition region and the high-x(Bj) - low Q(2) DIS region.
C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Morfin, JG (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0427-4
J9 AIP CONF PROC
PY 2007
VL 917
BP 43
EP 49
PG 7
WC Astronomy & Astrophysics; Physics, Multidisciplinary; Physics, Particles
   & Fields
SC Astronomy & Astrophysics; Physics
GA BGL24
UT WOS:000248121900005
ER

PT S
AU McLerran, L
AF McLerran, Larry
BE Valdez, HC
   Perez, MA
   DOlivo, JC
TI Color glass condensate and glasma
SO Particles and Fields
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 6th Latin American Symposium on High Energy Physics/12th Mexican School
   of Particles and Fields
CY NOV 01-08, 2006
CL Puerto Vallarta, MEXICO
SP Ctr Investigac & Estudios Avanzados, Ctr Latinoamericano Fis, Consefo Nacl Ciencia & Tecnol, Div Particulas & Campos SMF, Dept Energy, UNAM, Inst Ciencias Nucl, Int Ctr Theoret Phys, BUAP, Inst Fis, UASLP, Inst Fis, UNAM, Inst Fis, UMSNH, Inst Fis & Matemat, BUAP, Fac Ciencias Fisico Matemat, Natl Sci Fdn, Univ Guanajuato, Inst Fis, Univ Autonoma Metropolitana Iztapalapa, Univ Guadalajara, Acad Mexicana Ciencias
ID HEAVY-ION COLLISIONS; NUCLEAR COLLISIONS; GLUON PRODUCTION; SATURATION
   MOMENTUM; ENERGY-DEPENDENCE; SMALL-X; QCD; EQUATION; SINGULARITY;
   SCATTERING
AB The physics of the scattering of very high energy strongly interacting particles is controlled by a new, universal form of matter, the Color Glass Condensate. This matter is the dominant contribution to the low x part of a hadron wavefunction. In collisions, this mater almost instantaneously turns into a Glasma. The Glasma initially has strong longitudinal color electric and magnetic fields, with topological charge. These fields melt into gluons. Due to instabilities, quantum noise is converted into classical turbulence, which may be responsible for the early thermalization seen in heavy ion collisions at RHIC.
C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP McLerran, L (reprint author), Brookhaven Natl Lab, Dept Phys, POB 5000, Upton, NY 11973 USA.
NR 51
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0427-4
J9 AIP CONF PROC
PY 2007
VL 917
BP 219
EP 230
PG 12
WC Astronomy & Astrophysics; Physics, Multidisciplinary; Physics, Particles
   & Fields
SC Astronomy & Astrophysics; Physics
GA BGL24
UT WOS:000248121900027
ER

PT S
AU Gutierrez, G
AF Gutierrez, G.
CA DO collaboration
BE Valdez, HC
   Perez, MA
   DOlivo, JC
TI Top quark physics at DO
SO Particles and Fields
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 6th Latin American Symposium on High Energy Physics/12th Mexican School
   of Particles and Fields
CY NOV 01-08, 2006
CL Puerto Vallarta, MEXICO
SP Ctr Investigac & Estudios Avanzados, Ctr Latinoamericano Fis, Consefo Nacl Ciencia & Tecnol, Div Particulas & Campos SMF, Dept Energy, UNAM, Inst Ciencias Nucl, Int Ctr Theoret Phys, BUAP, Inst Fis, UASLP, Inst Fis, UNAM, Inst Fis, UMSNH, Inst Fis & Matemat, BUAP, Fac Ciencias Fisico Matemat, Natl Sci Fdn, Univ Guanajuato, Inst Fis, Univ Autonoma Metropolitana Iztapalapa, Univ Guadalajara, Acad Mexicana Ciencias
DE Top Physics
AB This note describes some of the most recent top quark measurements produced by the DO collaboration. At the same time it tries to give the reader an understanding of why after more that 10 years since the top quark discovery only the top quark pair production cross section and the top quark mass have been measured with relevant accuracy. The rewards that an increase will bring in the quest to completely characterize the top quark are also discussed.
C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Gutierrez, G (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA.
NR 3
TC 0
Z9 0
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0427-4
J9 AIP CONF PROC
PY 2007
VL 917
BP 360
EP 367
PG 8
WC Astronomy & Astrophysics; Physics, Multidisciplinary; Physics, Particles
   & Fields
SC Astronomy & Astrophysics; Physics
GA BGL24
UT WOS:000248121900044
ER

PT S
AU Castorena, J
   Felix, J
   Berisso, MC
   Christian, DC
   Gara, A
   Gottschalk, EE
   Gutierrez, G
   Hartouni, EP
   Knapp, BC
   Kreisler, MN
   Lee, S
   Markianos, K
   Moreno, G
   Reyes, MA
   Wang, MHLS
   Wehmann, A
   Wesson, D
AF Castorena, J.
   Felix, J.
   Berisso, M. C.
   Christian, D. C.
   Gara, A.
   Gottschalk, E. E.
   Gutierrez, G.
   Hartouni, E. P.
   Knapp, B. C.
   Kreisler, M. N.
   Lee, S.
   Markianos, K.
   Moreno, G.
   Reyes, M. A.
   Wang, M. H. L. S.
   Wehmann, A.
   Wesson, D.
BE Valdez, HC
   Perez, MA
   DOlivo, JC
TI Lambda polarization in pp -> p(f)p(s) Lambda 0anti-Lambda 0 at 800-GeV/c
SO PARTICLES AND FIELDS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 6th Latin American Symposium on High Energy Physics/12th Mexican School
   of Particles and Fields
CY NOV 01-08, 2006
CL Puerto Vallarta, MEXICO
SP Ctr Investigac & Estudios Avanzados, Ctr Latinoamericano Fis, Consefo Nacl Ciencia & Tecnol, Div Particulas & Campos SMF, Dept Energy, UNAM, Inst Ciencias Nucl, Int Ctr Theoret Phys, BUAP, Inst Fis, UASLP, Inst Fis, UNAM, Inst Fis, UMSNH, Inst Fis & Matemat, BUAP, Fac Ciencias Fisico Matemat, Natl Sci Fdn, Univ Guanajuato, Inst Fis, Univ Autonoma Metropolitana Iztapalapa, Univ Guadalajara, Acad Mexicana Ciencias
DE polarization; E690
AB The preliminary results of a Lambda 0 and anti-Lambda 0 polarization study as functions of the M(A-bA), X-F and their corresponding P-T are reported in this work.
C1 [Castorena, J.; Felix, J.; Moreno, G.; Reyes, M. A.] Univ Guanajuato, Guanajuato, Mexico.
   [Berisso, M. C.; Kreisler, M. N.; Lee, S.; Markianos, K.; Wang, M. H. L. S.; Wesson, D.] Univ Massachusetts, Amherst, MA 00215 USA.
   [Christian, D. C.; Gottschalk, E. E.; Gutierrez, G.] Fermi Lab, Batavia, IL 60510 USA.
   [Gara, A.; Knapp, B. C.] Columbia Univ, Nevis Lab, New York, NY 10027 USA.
   [Hartouni, E. P.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Castorena, J (reprint author), Univ Guanajuato, Guanajuato, Mexico.
NR 2
TC 0
Z9 0
U1 3
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0427-4
J9 AIP CONF PROC
PY 2007
VL 917
BP 413
EP 413
PG 1
WC Astronomy & Astrophysics; Physics, Multidisciplinary; Physics, Particles
   & Fields
SC Astronomy & Astrophysics; Physics
GA BGL24
UT WOS:000248121900054
ER

PT S
AU Ginocchio, JN
AF Ginocchio, Joseph N.
BE Asorey, M
   ClementeGallardo, J
   Marmo, G
TI A relativistic symmetry in nuclei
SO PARTICLES AND FIELDS: CLASSICAL AND QUANTUM
SE Journal of Physics Conference Series
LA English
DT Proceedings Paper
CT Conference on Particles and Fields: Classical and Quantum
CY SEP 18-21, 2006
CL Jaca, SPAIN
ID PSEUDOSPIN SYMMETRY; FIELD THEORY; PHYSICS; STATES; DECAY
AB We review some of the empirical and theoretical evidence supporting pseudospin symmetry in nuclei as a relativistic symmetry. We review the case that the eigenfunctions of realistic relativistic nuclear mean fields approximately conserve pseudospin symmetry in nuclei. We discuss the implications of pseudospin symmetry for magnetic dipole transitions and Gamow-Teller transitions between states in pseudospin doublets. We explore a more fundamental rationale for pseudospin symmetry in terms of quantum chromodynamics (QCD), the basic theory of the strong interactions. We show that pseudospin symmetry in nuclei implies spin symmetry for an anti-nucleon in a nuclear environment. We also discuss the future and what role pseudospin symmetry may be expected to play in an effective field theory of nucleons.
C1 Los Alamos Natl Lab, Div Theoret, MS B283, Los Alamos, NM 87545 USA.
RP Ginocchio, JN (reprint author), Los Alamos Natl Lab, Div Theoret, MS B283, Los Alamos, NM 87545 USA.
EM gino@lanl.gov
NR 47
TC 1
Z9 1
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 1742-6588
J9 J PHYS CONF SER
PY 2007
VL 87
AR 012011
DI 10.1088/1742-6596/87/1/012011
PG 8
WC Physics, Particles & Fields
SC Physics
GA BHK13
UT WOS:000253708900011
ER

PT S
AU McLerran, L
AF McLerran, Larry
BE Rajantie, A
   Dauncey, P
   Contaldi, C
   Stoica, H
TI Heavy ion collisions and new forms of matter
SO PARTICLES, STRINGS, AND COSMOLOGY
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 13th International Symposium on Particles, Strings and Cosmology (PASCOS
   2007)
CY JUL 02-07, 2007
CL London, ENGLAND
SP Sci & Tech Fac Council, Ctr Theoret Cosmol, Inst Particle Phys Phenomenol, Inst Phys, Imperial Coll London
DE high energy density matter; heavy ion collisions
ID COLOR GLASS CONDENSATE; QUARK-GLUON PLASMA; NUCLEAR COLLISIONS; QCD
   PLASMA; SMALL-X; EXCITATIONS; SATURATION; MODEL
AB I discuss forms of high energy density matter in QCD. These include the Color Glass Condensate, the Glasma and the Quark Gluon Plasma. These all might be studied in ultra-relativistic heavy ion collisions, and the Color Glass Condensate might also be probed in electron-hadron collisions. I present the properties of such matter, and some aspects of what is known of their properties.
C1 [McLerran, Larry] Brookhaven Natl Lab, Riken Brookhaven Ctr, Upton, NY 11973 USA.
RP McLerran, L (reprint author), Brookhaven Natl Lab, Riken Brookhaven Ctr, Upton, NY 11973 USA.
NR 46
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0471-7
J9 AIP CONF PROC
PY 2007
VL 957
BP 117
EP 123
PG 7
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA BHC17
UT WOS:000252161200014
ER

PT S
AU Lucini, B
   Patella, A
   Pica, C
AF Lucini, B.
   Patella, A.
   Pica, C.
BE Rajantie, A
   Dauncey, P
   Contaldi, C
   Stoica, H
TI Spontaneous breaking of discrete symmetries in QCD on a small volume
SO PARTICLES, STRINGS, AND COSMOLOGY
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 13th International Symposium on Particles, Strings and Cosmology (PASCOS
   2007)
CY JUL 02-07, 2007
CL London, ENGLAND
SP Sci & Tech Fac Council, Ctr Theoret Cosmol, Inst Particle Phys Phenomenol, Inst Phys, Imperial Coll London
DE QCD; spontaneous breaking of discrete symmetries; lattice gauge theories
AB In a compact space with non-trivial cycles, for sufficiently small values of the compact dimensions, charge conjugation (C), spatial reflection (P) and time reversal (I) are spontaneously broken in QCD. The order parameter for the symmetry breaking is the trace of the Wilson line wrapping around the compact dimension, which acquires an imaginary part in the broken phase. We show that a physical signature for the symmetry breaking is a persistent baryonic current wrapping in the compact directions. The existence of such a current is derived analytically at first order in perturbation theory and confirmed in the non-perturbative regime by lattice simulations.
C1 [Lucini, B.] Swansea Univ, Dept Phys, Singleton Pk, Swansea SA2 8PP, West Glam, Wales.
   [Patella, A.] Scuola Normale Super Pisa, I-56126 Pisa, Italy.
   [Patella, A.] INFN Pisa, I-56127 Pisa, Italy.
   [Pica, C.] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Lucini, B (reprint author), Swansea Univ, Dept Phys, Singleton Pk, Swansea SA2 8PP, West Glam, Wales.
OI Pica, Claudio/0000-0002-0569-0376; Lucini, Biagio/0000-0001-8974-8266
NR 6
TC 1
Z9 1
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0471-7
J9 AIP CONF PROC
PY 2007
VL 957
BP 229
EP +
PG 2
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA BHC17
UT WOS:000252161200033
ER

PT S
AU Sheen, DM
   McMakin, DL
   Hall, TE
AF Sheen, David M.
   McMakin, Douglas L.
   Hall, Thomas E.
BE Appleby, R
   Wikner, DA
TI Speckle in active millimeter-wave and terahertz imaging and spectroscopy
   - art. no. 654809
SO Passive Millimeter-Wave Imaging Technology X
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Passive Millimeter-Wave Imaging Technology X
CY APR   11, 2007
CL Orlando, FL
SP SPIE
DE millimeter waves; terahertz; speckle; imaging; holography; personnel
   surveillance; screening
ID CONCEALED WEAPON DETECTION
AB Wideband millimeter-wave imaging techniques and systems have been developed at Pacific Northwest National Laboratory (PNNL) for concealed weapon detection and other applications. These techniques evolved from single-frequency millimeter-wave holographic imaging methods to wideband three-dimensional planar and cylindrical techniques and systems. The single-frequency holographic method was derived from optical and ultrasonic holography techniques. Speckle is highly significant in this case, and is caused by constructive and destructive interference from multiple scattering locations or depths within a single resolution cell. The wideband three-dimensional techniques developed at PNNL significantly reduce the speckle effect through the use of high depth resolution obtained from the wide bandwidth of the illumination. For these techniques, speckle can still be significant in some cases and affect image quality. In this paper, we explore the situations in which speckle occurs and its relationship to lateral and depth resolution. This will be accomplished through numerical simulation and demonstrated in actual imaging results. Speckle may also play a significant role in altering reflection spectra in wideband terahertz spectra. Reflection from rough surfaces will generate speckle, which will result in significant variation in the reflection spectrum as measured over very wide bandwidths. This effect may make if difficult to interpret spectral absorption features from general reflectance data. In this paper, physical optics numerical simulation techniques will be used to model the reflection from arbitrary random surfaces and explore the effect of the surface on the reflection spectra and reconstructed image. Laboratory imaging and numerical modeling results in the millimeter-wave through the terahertz frequency ranges are presented.
C1 Pacific NW Natl Lab, Operated US Dept Energy, Battelle Mem Inst, Richland, WA 99354 USA.
RP Sheen, DM (reprint author), Pacific NW Natl Lab, Operated US Dept Energy, Battelle Mem Inst, POB 999, Richland, WA 99354 USA.
NR 10
TC 1
Z9 2
U1 1
U2 4
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6670-9
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6548
BP 54809
EP 54809
AR 654809
DI 10.1117/12.721323
PG 10
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BGL67
UT WOS:000248222600008
ER

PT J
AU Lynch, SV
   Allgaier, M
   Taylor, B
   Brodie, EL
   Brown, R
   Garcia, O
   Wiener-Kronish, J
AF Lynch, S. V.
   Allgaier, M.
   Taylor, B.
   Brodie, E. L.
   Brown, R.
   Garcia, O.
   Wiener-Kronish, J.
TI Microbial community analysis of CF sputum using the 16s rRNA phylochip
   during periods of exacerbation and remission reveals unprecedented
   microbial community diversity and large compositional shifts
SO PEDIATRIC PULMONOLOGY
LA English
DT Meeting Abstract
C1 [Lynch, S. V.; Allgaier, M.; Taylor, B.; Brown, R.; Garcia, O.; Wiener-Kronish, J.] Univ Calif San Francisco, San Francisco, CA 94143 USA.
   [Brodie, E. L.] Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA USA.
RI Lynch, Susan/B-6272-2009; Brodie, Eoin/A-7853-2008
OI Brodie, Eoin/0000-0002-8453-8435
NR 0
TC 0
Z9 0
U1 1
U2 2
PU WILEY-LISS
PI HOBOKEN
PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 8755-6863
J9 PEDIATR PULM
JI Pediatr. Pulmonol.
PY 2007
SU 30
MA 313
BP 312
EP 312
PG 1
WC Pediatrics; Respiratory System
SC Pediatrics; Respiratory System
GA 219SM
UT WOS:000250105000390
ER

PT S
AU Doty, FP
   McGregor, D
   Harrison, M
   Findley, K
   Polichar, R
AF Doty, F. P.
   McGregor, Douglas
   Harrison, Mark
   Findley, Kip
   Polichar, Raulf
BE Doty, FP
   Barber, HB
   Roehrig, H
TI Structure and properties of lanthanide halides - art. no. 670705
SO PENETRATING RADIATION SYSTEMS AND APPLICATIONS VIII
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Penetrating Radiation Systems and Applications VIII
CY AUG 29-30, 2007
CL San Diego, CA
SP SPIE
DE scintillators; lanthanide halides; nuclear detectors
ID SCINTILLATION PROPERTIES; CRYSTALS; CERIUM
AB Lanthanum and cerium bromides and chlorides form isomorphous alloy systems with the UCl3 type structure. These scintillating alloys exhibit high luminosity and proportional response, making them the first scintillators comparable to room temperature semiconductors for gamma spectroscopy; Ce(III) activated lanthanum. bromide has recently enabled scintillating gamma ray spectrometers with < 3% FWHM energy resolutions at 662 keV. However brittle fracture of these materials impedes development of large volume crystals. Low fracture stress and perfect cleavage along prismatic planes cause material cracking during and after crystal growth. These and other properties pose challenges for material production and post processing; therefore, understanding mechanical behavior is key to fabricating large single crystals, and engineering of robust detectors and systems.
   Recent progress on basic structure and properties of the lanthanide halides is reported here, including thermomechanical and thermogravimetric analyses, hygroscopicity, yield strength, and fracture toughness. Observations including reversible hydrate formation under atmospheric pressure, loss of stoichiometry at high temperature, anisotropic thermal expansion, reactivity towards common crucible materials, and crack initiation and propagation under applied loads are reported. The fundamental physical and chemical properties of this system introduce challenges for material processing, scale-up, and detector fabrication.
   Analysis of the symmetry and crystal structure of this system suggests possible mechanisms for deformation and crack initiation under stress. The low c/a ratio and low symmetry relative to traditional scintillators indicate limited and highly anisotropic plasticity cause redistribution of residual process stress to cleavage planes, initiating fracture. This proposed failure mechanism and its implications for scale up to large diameter crystal growth are also discussed.
C1 [Doty, F. P.] Sandia Natl Labs, Livermore, CA 94550 USA.
RP Doty, FP (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
RI Findley, Kip/H-8845-2013
OI Findley, Kip/0000-0001-7068-9446
NR 12
TC 7
Z9 9
U1 0
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6855-0
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6707
BP 70705
EP 70705
DI 10.1117/12.740849
PG 11
WC Optics; Physics, Applied
SC Optics; Physics
GA BHC51
UT WOS:000252182000004
ER

PT S
AU Yang, P
   DiAntonio, CB
   Boyle, TJ
   Rodniguez, MA
   Sanchez, MR
AF Yang, Pin
   DiAntonio, Christopher B.
   Boyle, Timothy J.
   Rodniguez, Mark A.
   Sanchez, Margaret R.
BE Doty, FP
   Barber, HB
   Roehrig, H
TI Dehydration and solid solution formation for the LaBr3-CeBr3 binary
   system - art. no. 670709
SO PENETRATING RADIATION SYSTEMS AND APPLICATIONS VIII
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Penetrating Radiation Systems and Applications VIII
CY AUG 29-30, 2007
CL San Diego, CA
SP SPIE
DE lanthanum halides; scintillation; dehydration; phase diagram; solid
   solution
ID THERMAL DECOMPOSITION; RARE-EARTH; CHLORIDE; SCINTILLATOR; LANTHANUM;
   BROMIDES; YTTRIUM; LABR3
AB Anhydrous cerium bromide (CeBr3) and cerium doped lanthanum bromide (Ce+3-LaBr3) were obtained by the dehydration of hydrates synthesized by a direct acidification process. The dehydration process involves heating in vacuum through three phase changes - hydrate, amorphous, and crystalline LaBr3. Incomplete removal of the bound water leads to the formation of oxybromides and the partial reduction of the lanthanum at high temperatures. It was found that upon the completion of dehydration (< 200 degrees C) a complete solid solution can be formed between LaBr3 and CeBr3. These two compounds form a simple binary phase diagram. Challenges associated with the dehydration process are discussed.
C1 [Yang, Pin; DiAntonio, Christopher B.; Boyle, Timothy J.; Rodniguez, Mark A.; Sanchez, Margaret R.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Yang, P (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 11
TC 1
Z9 1
U1 1
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6855-0
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6707
BP 70709
EP 70709
DI 10.1117/12.740827
PG 8
WC Optics; Physics, Applied
SC Optics; Physics
GA BHC51
UT WOS:000252182000007
ER

PT S
AU Wilson, TMS
   Doty, FP
   Chinn, DA
   King, MJ
   Simmons, BA
AF Wilson, Tiffany M. S.
   Doty, F. Patrick
   Chinn, Douglas A.
   King, Michael J.
   Simmons, Blake A.
BE Doty, FP
   Barber, HB
   Roehrig, H
TI Order and charge collection correlations in organic materials for
   neutron detection - art. no. 670710
SO PENETRATING RADIATION SYSTEMS AND APPLICATIONS VIII
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Penetrating Radiation Systems and Applications VIII
CY AUG 29-30, 2007
CL San Diego, CA
SP SPIE
DE PPV; neutron detection; radiation detection; semiconducting polymer;
   dichroism; FTIR
ID FIELD-EFFECT TRANSISTORS; THIN-FILM TRANSISTORS; POLY(PHENYLENE
   VINYLENE); CONJUGATED POLYMERS; EFFECT MOBILITY; PPV; PHOTOLUMINESCENCE;
   PERFORMANCE
AB Organic materials, and in particular, poly(p-phenylene vinylene)s, are being investigated for solid state neutron detection. Semiconducting organics can offer direct detection because of high resistivity, high dielectric strength, natural gamma discrimination due to low Z, and room temperature operation. However, the effective charge collection is dependant on several material processing variables, including solvent choice and concentration, substrate, deposition method and conditions, post-deposition processing, and other factors, all of which can influence the local and bulk order of the material. We have investigated the effects of processing variables on the material order through infrared dichroism. The charge collection of the device was measured with visible laser excitation, and related to the order.
C1 [Wilson, Tiffany M. S.; Doty, F. Patrick; King, Michael J.; Simmons, Blake A.] Sandia Natl Labs, Livermore, CA 94550 USA.
RP Wilson, TMS (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 26
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6855-0
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6707
BP 70710
EP 70710
DI 10.1117/12.740660
PG 8
WC Optics; Physics, Applied
SC Optics; Physics
GA BHC51
UT WOS:000252182000027
ER

PT S
AU Herr, AD
   Antolak, AJ
   Morse, DH
   King, M
   Raber, T
   Hertz, K
   Leung, KN
   Lou, TP
AF Herr, Andrew D.
   Antolak, Arlyn J.
   Morse, Dan H.
   King, Michael
   Raber, Tom
   Hertz, Kristin
   Leung, Ka-Ngo
   Lou, Tak-Pui
BE Doty, FP
   Barber, HB
   Roehrig, H
TI Investigation of CaF2 : Eu scintillator for D-D neutron interrogation -
   art. no. 670711
SO PENETRATING RADIATION SYSTEMS AND APPLICATIONS VIII
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Penetrating Radiation Systems and Applications VIII
CY AUG 29-30, 2007
CL San Diego, CA
SP SPIE
DE calcium fluoride; scintillation; fission; neutron detection; active
   interrogation
AB CaF2:Eu is an attractive radiation detection material because it is inert, non-hygroscopic, shock resistant, and can be less expensive than other radiation detection materials. A CaF2:Eu scintillation detector was constructed to identify whether energy dependent differences in (n,p) and (n,alpha) cross sections could be exploited to distinguish fission neutrons from DD neutrons in an active interrogation system. Experimentally, the charged particles are difficult to distinguish from the significantly larger number of gamma-rays produced in (n,gamma) reactions. In addition, modeling results show that fission neutrons produce only slightly higher charged particle production rates than D-D neutrons. For charged particle production in CaF2:Eu to succeed in fission neutron detection, a superior gamma-ray discrimination technique is required.
C1 [Herr, Andrew D.; Antolak, Arlyn J.; Morse, Dan H.; King, Michael; Raber, Tom; Hertz, Kristin] Sandia Natl Labs, Livermore, CA 94551 USA.
RP Herr, AD (reprint author), Sandia Natl Labs, Livermore, CA 94551 USA.
NR 8
TC 0
Z9 0
U1 1
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6855-0
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6707
BP 70711
EP 70711
DI 10.1117/12.740823
PG 5
WC Optics; Physics, Applied
SC Optics; Physics
GA BHC51
UT WOS:000252182000028
ER

PT S
AU Hamson, MJ
   Doty, FP
AF Hamson, M. J.
   Doty, F. P.
BE Doty, FP
   Barber, HB
   Roehrig, H
TI Initial investigation of strengthening agents for lanthanide halide
   scintillators - art. no. 67070B
SO PENETRATING RADIATION SYSTEMS AND APPLICATIONS VIII
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Penetrating Radiation Systems and Applications VIII
CY AUG 29-30, 2007
CL San Diego, CA
SP SPIE
DE scintillators; isovalent; aliovalent; solid solution hardening; ionic
   crystals; lanthanide halides
ID SINGLE-CRYSTALS
AB Lanthanide halide alloys have recently enabled scintillating gamma ray spectrometers comparable to room-temperature semiconductors (< 3% FWHM energy resolutions at 662keV). However brittle fracture of these materials hinders the growth of large volume crystals. Efforts to improve the strength through non-lanthanide alloy substitution, while preserving scintillation, are being pursued. Isovalent alloys nominal Ce0.9Al0.1Br3, Ce0.9Ga0.1Br3, Ce0.9Sc0.1Br3, Ce0.9In0.1Br3 and Ce0.8Y0.2Br3, as well as aliovalent alloys nominal (CeBr3)(0.99)(CdCl2)(0.01), (CeBr3)(0.99)(CdBr2)(0.01), (CeBr3)(0.99)(ZnBr2)(0.01), (CeBr3)(0.99)(CaBr2)(0.011) (CeBr3)(0.99)(SrBr2)(0.01) (CeBr3)(0.99)(PbBr2)(0.011) (CeBr3)(0.99)(ZrBr4)(0.01), (CeBr3)(0.99)(HfBr4)(0.01) were prepared. All of these alloys exhibit bright fluorescence under UV excitation, with varying shifts in the spectral peaks and intensities relative to pure CeBr3. Further, these alloys scintillate when coupled to a photomultiplier tube (PMT) and exposed to Cs-137 gamma rays. These data and the potential for improved crystal growth will be discussed.
C1 [Hamson, M. J.; Doty, F. P.] Sandia Natl Labs, Livermore, CA 94550 USA.
RP Hamson, MJ (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 6
TC 0
Z9 0
U1 0
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6855-0
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6707
BP B7070
EP B7070
PG 10
WC Optics; Physics, Applied
SC Optics; Physics
GA BHC51
UT WOS:000252182000008
ER

PT S
AU Chen, CF
   Cooley, J
   Stanek, C
   Byler, D
   Volz, H
   Dickerson, R
   Dombrowski, D
   Tucker, T
   Bartram, B
   Ewing, B
   Mauro, M
   Weinberg, R
AF Chen, C. F.
   Cooley, J.
   Stanek, C.
   Byler, D.
   Volz, H.
   Dickerson, R.
   Dombrowski, D.
   Tucker, T.
   Bartram, B.
   Ewing, B.
   Mauro, M.
   Weinberg, R.
BE Doty, FP
   Barber, HB
   Roehrig, H
TI Nanosized grain polycrystalline scintillators for special nuclear
   materials detection - art. no. 67070C
SO PENETRATING RADIATION SYSTEMS AND APPLICATIONS VIII
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Penetrating Radiation Systems and Applications VIII
CY AUG 29-30, 2007
CL San Diego, CA
SP SPIE
DE nanoparticle; nanosized grain; polycrystalline; LaBr3 : Ce;
   scintillator; special nuclear materials; detector; lanthanum bromide
AB The aim of this work was to explore the limits of polycrystalline ceramic scintillator in countering the nuclear threat. The goal was to develop a polycrystalline LaBr3:Ce, which can be processed from ceramic forming techniques and can be produced in large size scintillator panels with lower cost and high production rate. Three high purity raw powders were used as the starting materials including LaBr3, LaCl3, and CeBr3- Powder characteristics were measured. A melt spinning method was used to synthesize the nanoparticle LaBr3:Ce with stoichiometric compositions. The synthesized nanoparticles were characterized and the average particle size of the synthesized nanoparticle LaBr3:Ce was about 50 nm. The melt spun powders were consolidated using a "Nanosintering" method to achieve a high density while maintaining the stoichiometric composition. The grain size of the sintered polycrystalline is about 50 nm, which shows no grain growth during the densification process.
C1 [Chen, C. F.; Cooley, J.; Stanek, C.; Byler, D.; Volz, H.; Dickerson, R.; Dombrowski, D.; Tucker, T.; Bartram, B.; Ewing, B.; Mauro, M.; Weinberg, R.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Chen, CF (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
RI Cooley, Jason/E-4163-2013
NR 8
TC 0
Z9 0
U1 0
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6855-0
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6707
BP C7070
EP C7070
DI 10.1117/12.740826
PG 10
WC Optics; Physics, Applied
SC Optics; Physics
GA BHC51
UT WOS:000252182000009
ER

PT S
AU Doty, FP
   Bauer, CA
   Grant, PG
   Simmons, BA
   Skulan, AJ
   Allendorf, MD
AF Doty, F. P.
   Bauer, C. A.
   Grant, P. G.
   Simmons, B. A.
   Skulan, A. J.
   Allendorf, M. D.
BE Doty, FP
   Barber, HB
   Roehrig, H
TI Radioluminescence and radiation effects in metal organic framework
   materials - art. no. 67070F
SO PENETRATING RADIATION SYSTEMS AND APPLICATIONS VIII
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Penetrating Radiation Systems and Applications VIII
CY AUG 29-30, 2007
CL San Diego, CA
SP SPIE
DE organic scintillators; metalorganic frameworks; luminescence; radiation
   damage
ID SEPARATION
AB We have synthesized and tested new highly fluorescent metal organic framework (MOF) materials based on stilbene dicarboxylic acid as a linker. The crystal structure and porosity of the product are dependent on synthetic conditions and choice of solvent and a low-density cubic form has been identified by x-ray diffraction. In this work we report experiments demonstrating scintillation properties of these crystals. Bright proton-induced luminescence with large shifts relative to the fluorescence excitation spectra were recorded, peaking near 475 run. Tolerance to fast proton radiation was evaluated by monitoring this radio-luminescence to absorbed doses of several hundred MRAD.
C1 [Doty, F. P.; Simmons, B. A.; Skulan, A. J.; Allendorf, M. D.] Sandia Natl Labs, Livermore, CA 94550 USA.
RP Doty, FP (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 10
TC 0
Z9 0
U1 0
U2 5
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6855-0
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6707
BP F7070
EP F7070
DI 10.1117/12.740829
PG 8
WC Optics; Physics, Applied
SC Optics; Physics
GA BHC51
UT WOS:000252182000011
ER

PT S
AU Grim, GP
   Day, RD
   Clark, DD
   Fatherley, VE
   Garcia, FP
   Jaramillo, SA
   Montoya, AJ
   Morgan, GL
   Oertel, JA
   Ortiz, TA
   Payton, JR
   Pazuchanics, PD
   Schmidt, DAW
   Valdez, AC
   Wilde, CH
   Wilke, MD
AF Grim, G. P.
   Day, R. D.
   Clark, D. D.
   Fatherley, V. E.
   Garcia, F. P.
   Jaramillo, S. A.
   Montoya, A. J.
   Morgan, G. L.
   Oertel, J. A.
   Ortiz, T. A.
   Payton, J. R.
   Pazuchanics, P. D.
   Schmidt, D. A. W.
   Valdez, A. C.
   Wilde, C. H.
   Wilke, M. D.
BE Doty, FP
   Barber, HB
   Roehrig, H
TI Neutron Imaging for inertial confinement fusion experiments - art. no.
   67070H
SO PENETRATING RADIATION SYSTEMS AND APPLICATIONS VIII
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Penetrating Radiation Systems and Applications VIII
CY AUG 29-30, 2007
CL San Diego, CA
SP SPIE
DE neutron imaging; Inertial Confinement Fusion (ICF); scintillators
ID NATIONAL IGNITION FACILITY; TARGETS; DESIGN; IMAGES
AB Neutron imaging of Inertial Confinement Fusion (ICF) targets provides a powerful tool for understanding the implosion conditions of deuterium and tritium filled targets at Mega-Joule/Tera-Watt scale laser facilities. The primary purpose of imaging ICF targets at that National Ignition Facility (NIF), sited at Lawrence Livermore National Laboratory, Livermore, California, is to determine the asymmetry of the fuel in an imploded ICF target. The image data are then combined with other nuclear information to gain insight into the laser and radiation conditions used to drive the target. This information is requisite to understanding the physics of Inertial Confinement Fusion targets and provides a failure mode diagnostic used to optimize the conditions of experiments aimed at obtaining ignition. We present an overview of neutron aperture imaging including a discussion of image formation and reconstruction, requirements for the future (NIF) neutron imaging systems, a description of current imaging system capabilities, and ongoing work to affect imaging systems capable of meeting future system requirements.
C1 [Grim, G. P.; Day, R. D.; Clark, D. D.; Fatherley, V. E.; Garcia, F. P.; Jaramillo, S. A.; Montoya, A. J.; Morgan, G. L.; Oertel, J. A.; Ortiz, T. A.; Payton, J. R.; Pazuchanics, P. D.; Schmidt, D. A. W.; Valdez, A. C.; Wilde, C. H.; Wilke, M. D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Grim, GP (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
NR 21
TC 4
Z9 6
U1 0
U2 5
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6855-0
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6707
BP H7070
EP H7070
DI 10.1117/12.741006
PG 15
WC Optics; Physics, Applied
SC Optics; Physics
GA BHC51
UT WOS:000252182000013
ER

PT S
AU Sale, K
   Candy, J
   Breitfeller, E
   Guidry, B
   Manatt, D
   Goshell, T
   Lawrence, DC
AF Sale, K.
   Candy, J.
   Breitfeller, E.
   Guidry, B.
   Manatt, D.
   Goshell, T.
   Lawrence, D. Chambers
BE Doty, FP
   Barber, HB
   Roehrig, H
TI A Bayesian sequential processor approach to spectroscopic portal system
   decisions
SO PENETRATING RADIATION SYSTEMS AND APPLICATIONS VIII
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Penetrating Radiation Systems and Applications VIII
CY AUG 29-30, 2007
CL San Diego, CA
SP SPIE
AB The development of faster more reliable techniques to detect radioactive contraband in a portal type scenario is an extremely important problem especially in this era of constant terrorist threats. Towards this goal the development of a model-based, Bayesian sequential data processor for the detection problem is discussed. In the sequential processor each datum (detector energy deposit and pulse arrival time) is used to update the posterior probability distribution over the space of model parameters. The nature of the sequential processor approach is that a detection is produced as soon as it is statistically justified by the data rather than waiting for a fixed counting interval before any analysis is performed. In this paper the Bayesian model-based approach, physics and signal processing models and decision functions are discussed along with the first results of our research.
C1 [Sale, K.; Candy, J.; Breitfeller, E.; Guidry, B.; Manatt, D.; Goshell, T.; Lawrence, D. Chambers] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Sale, K (reprint author), Lawrence Livermore Natl Lab, POB 808,L-186, Livermore, CA 94551 USA.
EM salel@llnl.gov
NR 21
TC 0
Z9 0
U1 1
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6855-0
J9 PROC SPIE
PY 2007
VL 6707
AR 67070P
DI 10.1117/12.739137
PG 12
WC Optics; Physics, Applied
SC Optics; Physics
GA BHC51
UT WOS:000252182000018
ER

PT S
AU Chernov, AA
   Rashkovich, LN
   DeYoreo, JJ
AF Chernov, A. A.
   Rashkovich, L. N.
   DeYoreo, J. J.
BE Skowronski, M
   DeYoreo, JJ
   Wang, CA
TI ABC of kink kinetics and density in a complex solution
SO PERSPECTIVES ON INORGANIC, ORGANIC, AND BIOLOGICAL CRYSTAL GROWTH: FROM
   FUNDAMENTALS TO APPLICATIONS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 13th International Summer School on Crystal Growth
CY AUG 05-11, 2007
CL Park City, UT
SP Int Inst Complex Adapt Matter, Int Union Crystallog, Lawrence Livermore Natl Lab, Olsen Fdn, Amer Assoc Crystal Growth
DE solution growth; kinetics; kinks; steps; surfaces; supersaturation;
   surface energy
ID CRYSTALS; GROWTH; NUCLEATION; KH2PO4
AB This tutorial lecture explains the ways supersaturation in complex solutions may be introduced to be most relevant to describe experimental data on kink and step kinetics. To do so, we express the kink rate via the frequencies of attachment and detachment of the building units and then link these frequencies to the measurable activities of these units in solution. Possible reasons for violation of the Gibbs-Thomson law are also briefly discussed with reference to our earlier work.
C1 [Chernov, A. A.; DeYoreo, J. J.] Lawrence Livermore Natl Lab, 7000 E St, Livermore, CA 94551 USA.
   [Rashkovich, L. N.] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119992, Russia.
RP Chernov, AA (reprint author), Lawrence Livermore Natl Lab, 7000 E St, Livermore, CA 94551 USA.
FU Lawrence Livermore National Laboratory under the US Department of Energy
   [W-7405-Eng-48]; Department of Energy Office of Basic Energy Sciences
   [054510]
FX he authors take this opportunity to thank Drs J.L.Giocondi and C.A.Orme
   forrecal culation of solution composition of calcium oxalate and for
   valuable discussions.; This work was in part performed at Lawrence
   Livermore National Laboratory under the US Department of Energy Contract
   No. W-7405-Eng-48 with funding from the Department of Energy Office of
   Basic Energy Sciences contract 054510.
NR 27
TC 2
Z9 2
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0426-7
J9 AIP CONF PROC
PY 2007
VL 916
BP 34
EP +
PG 3
WC Crystallography; Engineering, Multidisciplinary
SC Crystallography; Engineering
GA BGK70
UT WOS:000248045500002
ER

PT S
AU Parker, SC
   Allen, JP
   Arrouvel, C
   Spagnoli, D
   Kerisit, S
   Sayle, DC
AF Parker, S. C.
   Allen, J. P.
   Arrouvel, C.
   Spagnoli, D.
   Kerisit, S.
   Sayle, D. C.
BE Skowronski, M
   DeYoreo, JJ
   Wang, CA
TI Molecular simulation of mineral surfaces and the role of impurities on
   surface stability
SO PERSPECTIVES ON INORGANIC, ORGANIC, AND BIOLOGICAL CRYSTAL GROWTH: FROM
   FUNDAMENTALS TO APPLICATIONS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 13th International Summer School on Crystal Growth
CY AUG 05-11, 2007
CL Park City, UT
SP Int Inst Complex Adapt Matter, Int Union Crystallog, Lawrence Livermore Natl Lab, Olsen Fdn, Amer Assoc Crystal Growth
DE atomistic simulation; crystal growth; mineral-water interface; surface
   energy
ID HABIT CONTROLLING FACTOR; TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET;
   ATOMISTIC SIMULATION; ATTACHMENT ENERGY; DYNAMICS SIMULATIONS; WATER
   INTERFACE; CALCITE SURFACE; CRYSTAL-GROWTH; MORPHOLOGY
AB Molecular simulation techniques represent a powerful complement to experiment for studying the surfaces and interfaces of minerals, not least because we can easily visualize the surface processes. The aim of this presentation is to describe recent work using molecular simulation methods to model the structure, stability and reactivity of mineral surfaces and how the simulation of these properties can be used to predict morphologies. Initially, we will describe how molecular simulation techniques can be used to give a reliable description of the surfaces. One of the significant contributions that atom-based simulation methods can make is in the investigation of competitive adsorption of impurities at surfaces and several examples are shown. Finally, two approaches for increasing the scope and reliability of the simulations are discussed, namely, electronic structure calculations, which enable us to explore the mineral surface stoichiometry and potential-based molecular dynamics simulations, which introduce dynamical contribution to the surface processes and hence allows for detailed characterization of the mineral-water interface.
C1 [Parker, S. C.; Allen, J. P.; Arrouvel, C.] Univ Bath, Dept Chem, Bath BA2 7AY, Avon, England.
   [Spagnoli, D.] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
   [Kerisit, S.] Pacific Northwest Natl Lab, Div Mat & Chem Sci, Richland, WA 99354 USA.
   [Sayle, D. C.] Cranfield Univ, DMAS, Swindon SN6 8LA, Wilts, England.
RP Parker, SC (reprint author), Univ Bath, Dept Chem, Bath BA2 7AY, Avon, England.
RI Allen, Jeremy/C-4778-2009; Sayle, Dean/D-8555-2013; Spagnoli,
   Dino/F-8641-2011; Parker, Steve/C-8180-2011
OI Sayle, Dean/0000-0001-7227-9010; Spagnoli, Dino/0000-0001-6367-4748;
   Parker, Steve/0000-0003-3804-0975
NR 52
TC 2
Z9 2
U1 0
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0426-7
J9 AIP CONF PROC
PY 2007
VL 916
BP 268
EP +
PG 3
WC Crystallography; Engineering, Multidisciplinary
SC Crystallography; Engineering
GA BGK70
UT WOS:000248045500013
ER

PT S
AU Orme, CA
   Giocondi, JL
AF Orme, Christine A.
   Giocondi, Jennifer L.
BE Skowronski, M
   DeYoreo, JJ
   Wang, CA
TI The use of scanning probe microscopy to investigate crystal-fluid
   interfaces
SO Perspectives on Inorganic, Organic, and Biological Crystal Growth: From
   Fundamentals to Applications
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 13th International Summer School on Crystal Growth
CY AUG 05-11, 2007
CL Park City, UT
SP Int Inst Complex Adapt Matter, Int Union Crystallog, Lawrence Livermore Natl Lab, Olsen Fdn, Amer Assoc Crystal Growth
DE crystal growth; scanning probe microscopy; SPM; in situ imaging; surface
   dynamics; step kinetics; critical length
ID ATOMIC-FORCE MICROSCOPY; SURFACE SELF-DIFFUSION; MOLECULAR-BEAM EPITAXY;
   IN-SITU; CRYSTALLIZATION KINETICS; PROTEIN CRYSTALLIZATION; TUNNELING
   MICROSCOPY; ELECTRON-MICROSCOPY; GROWTH-KINETICS; KINK DYNAMICS
AB Over the past decade there has been a natural drive to extend the investigation of dynamic surfaces in fluid environments to higher resolution characterization tools. Various aspects of solution crystal growth have been directly visualized for the first time. These include island nucleation and growth using transmission electron microscopy and scanning tunneling microscopy; elemental step motion using scanning probe microscopy; and the time evolution of interfacial atomic structure using various diffraction techniques. In this lecture we will discuss the use of one such in situ method, scanning probe microscopy, as a means of measuring surface dynamics during crystal growth and dissolution. We will cover both practical aspects of imaging such as environmental control, fluid flow, and electrochemical manipulation, as well as the types of physical measurements that can be made. Measurements such as step motion, critical lengths, nucleation density, and step fluctuations, will be put in context of the information they provide about mechanistic processes at surfaces using examples from metal and mineral crystal growth.
C1 Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, Livermore, CA 94550 USA.
RP Orme, CA (reprint author), Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, 7000 E Ave,Mail Stop L-350, Livermore, CA 94550 USA.
RI Orme, Christine/A-4109-2009
NR 55
TC 3
Z9 3
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0426-7
J9 AIP CONF PROC
PY 2007
VL 916
BP 342
EP 362
PG 21
WC Crystallography; Engineering, Multidisciplinary
SC Crystallography; Engineering
GA BGK70
UT WOS:000248045500017
ER

PT S
AU De Yoreo, JJ
AF De Yoreo, James J.
BE Skowronski, M
   DeYoreo, JJ
   Wang, CA
TI Biomolecular modification of inorganic crystal growth
SO Perspectives on Inorganic, Organic, and Biological Crystal Growth: From
   Fundamentals to Applications
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 13th International Summer School on Crystal Growth
CY AUG 05-11, 2007
CL Park City, UT
SP Int Inst Complex Adapt Matter, Int Union Crystallog, Lawrence Livermore Natl Lab, Olsen Fdn, Amer Assoc Crystal Growth
DE crystal growth from solution; atomic force microscopy; impurities;
   biomolecules
ID CALCITE GROWTH; SELECTIVE BINDING; CRYSTALLIZATION; KINETICS;
   MINERALIZATION; MODULATION; CITRATE; STEPS
AB The fascinating shapes and hierarchical designs of biomineralized structures are an inspiration to materials scientists because of the potential they suggest for biomolecular control over materials synthesis. Conversely, the failure to prevent or limit tissue mineralization in the vascular, skeletal, and urinary systems is a common source of disease. Understanding the mechanisms by which organisms direct or limit crystallization has long been a central challenge to the biomineralization community. One prevailing view is that mineral-associated macromolecules are responsible for either inhibiting crystallization or initiating and stabilizing non-equilibrium crystal polymorphs and morphologies through interactions between anionic moieties and cations in solution or at mineralizing surfaces. In particular, biomolecules that present carboxyl groups to the growing crystal have been implicated as primary modulators of growth. Here we review the results from a combination of in situ atomic force microscopy (AFM) and molecular modeling (MM) studies to investigate the effect of specific interactions between carboxylate-rich biomolecules and atomic steps on crystal surfaces during the growth of carbonates, oxalates and phosphates of calcium. Specifically, we how the growth kinetics and morphology depend on the concentration of additives that include citrate, simple amino acids, synthetic Asp-rich polypeptides, and naturally occurring Asp-rich proteins found in both functional and pathological mineral tissues. The results reveal a consistent picture of shape modification in which stereochemical matching of modifiers to specific atomic steps drives shape modification. Inhibition and other changes in growth kinetics are shown to be due to a range of mechanisms that depend on chemistry and molecular size. Some effects are well described by classic crystal growth theories, but others, such as step acceleration due to peptide charge and hydrophylicity, were previously unrealized. Finally, we show that the molecular scale observations are well correlated with macroscopic growth rate data.
C1 Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, Livermore, CA 94551 USA.
RP De Yoreo, JJ (reprint author), Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, Livermore, CA 94551 USA.
NR 22
TC 1
Z9 1
U1 2
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0426-7
J9 AIP CONF PROC
PY 2007
VL 916
BP 416
EP 438
PG 23
WC Crystallography; Engineering, Multidisciplinary
SC Crystallography; Engineering
GA BGK70
UT WOS:000248045500021
ER

PT S
AU Tornsia, AP
   Saiz, E
   Deville, S
AF Tornsia, Antoni P.
   Saiz, Eduardo
   Deville, Sylvain
BE Skowronski, M
   DeYoreo, JJ
   Wang, CA
TI Artificial bone and teeth through controlled lee growth in colloidal
   suspensions
SO PERSPECTIVES ON INORGANIC, ORGANIC, AND BIOLOGICAL CRYSTAL GROWTH: FROM
   FUNDAMENTALS TO APPLICATIONS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 13th International Summer School on Crystal Growth
CY AUG 05-11, 2007
CL Park City, UT
SP Int Inst Complex Adapt Matter, Int Union Crystallog, Lawrence Livermore Natl Lab, Olsen Fdn, Amer Assoc Crystal Growth
DE ice growth; artificial bone; biomimetics; freezing
ID COMPOSITES; SOLIDIFICATION; PARTICLES; TOUGHNESS; SCAFFOLDS; DESIGN;
   NACRE
AB The formation of regular patterns is a common feature of many solidification processes involving cast materials. We describe here how regular patterns can be obtained in porous alumina and hydroxyapatite (HAP) by controlling the freezing of ceramic slurries followed by subsequent ice sublimation and sintering, leading to multilayered porous ceramic structures with homogeneous and well-defined architecture. These porous materials can be infiltrated with a second phase of choice to yield biomimetic nacre-like composites with improved mechanical properties, which could be used for artificial bone and teeth applications. Proper control of the solidification patterns provides powerful means of control over the final functional properties. We discuss the relationships between the experimental results, ice growth fundamentals, the physics of ice and the interaction between inert particles and the solidification front during directional freezing.
C1 [Tornsia, Antoni P.; Saiz, Eduardo] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
   [Deville, Sylvain] Saint Gobain CREE, Lab Synthesis & Functionalisat Ceram, FRE2770, Cavaillon 84306, France.
RP Tornsia, AP (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
NR 21
TC 0
Z9 0
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0426-7
J9 AIP CONF PROC
PY 2007
VL 916
BP 560
EP +
PG 3
WC Crystallography; Engineering, Multidisciplinary
SC Crystallography; Engineering
GA BGK70
UT WOS:000248045500027
ER

PT J
AU Temmerman, WM
   Svane, A
   Petit, L
   Luders, M
   Strange, P
   Szotek, Z
AF Temmerman, W. M.
   Svane, A.
   Petit, L.
   Lueders, M.
   Strange, P.
   Szotek, Z.
TI Pressure induced valence transitions in f-electron systems
SO PHASE TRANSITIONS
LA English
DT Article
DE SIC-LSD; pressure; f-electron system; valence transition; localization
ID SEMICONDUCTOR-METAL TRANSITION; DENSITY-FUNCTIONAL FORMALISM;
   SELF-INTERACTION CORRECTION; RARE-EARTH CHALCOGENIDES; NACL-TYPE
   STRUCTURE; X-RAY; PHASE-TRANSITIONS; PRASEODYMIUM MONOPNICTIDES;
   1ST-PRINCIPLES THEORY; TRANSPORT-PROPERTIES
AB A review is given of pressure induced valence transitions in f-electron systems calculated with the self-interaction corrected local spin density (SIC-LSD) approximation. These calculations show that the SIC-LSD is able to describe valence changes as a function of pressure or chemical composition. An important finding is the dual character of the f-electrons as either localized or band-like. A finite temperature generalisation is presented and applied to the study of the p-T phase diagram of the alpha up arrow gamma phase transition in Ce.
C1 SERC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England.
   Univ Aarhus, Dept Phys & Astron, DK-8000 Aarhus C, Denmark.
   Oak Ridge Natl Lab, Dept Math & Comp Sci, Oak Ridge, TN 37831 USA.
   Oak Ridge Natl Lab, Ctr Computat Sci, Oak Ridge, TN 37831 USA.
   Univ Kent, Sch Phys Sci, Canterbury CT2 7NH, Kent, England.
RP Temmerman, WM (reprint author), SERC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England.
EM w.m.temmerman@dl.ac.uk
RI Petit, Leon/B-5255-2008; Lueders, Martin/D-1622-2010; Strange,
   Paul/C-9022-2012; 
OI Petit, Leon/0000-0001-6489-9922
NR 97
TC 8
Z9 8
U1 2
U2 6
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0141-1594
EI 1029-0338
J9 PHASE TRANSIT
JI Phase Transit.
PY 2007
VL 80
IS 4-5
BP 415
EP 443
DI 10.1080/01411590701228703
PG 29
WC Crystallography; Physics, Condensed Matter
SC Crystallography; Physics
GA 178SG
UT WOS:000247239800009
ER

PT J
AU Goncharov, AF
   Crowhurst, J
AF Goncharov, Alexander F.
   Crowhurst, Jonathan
TI Proton delocalization under extreme conditions of high pressure and
   temperature
SO PHASE TRANSITIONS
LA English
DT Review
DE hydrogen; pressure; proton disorder; molecular dissociation; interatomic
   potentials; quantum fluid; dynamic ionization; melting
ID X-RAY-DIFFRACTION; HYDROGEN-BOND SYMMETRIZATION; EQUATION-OF-STATE;
   LIQUID METALLIC HYDROGEN; GPA 1.4 MBAR; ICE-VII; SOLID HYDROGEN; DENSE
   HYDROGEN; INFRARED-ABSORPTION; MOLECULAR-HYDROGEN
AB Knowledge of the behaviour of light hydrogen-containing molecules under extreme conditions of high pressure and temperature is crucial to a comprehensive understanding of the fundamental physics and chemistry that is relevant under such conditions. It is also vital for interpreting the results of planetary observations, in particular those of the gas giants, and also for various materials science applications. On a fundamental level, increasing pressure causes the redistribution of the electronic density, which results in a modification of the interatomic potentials followed by a consequent qualitative change in the character of the associated bonding. Ultimately, at sufficiently high pressure, one may anticipate a transformation to a homogeneously bonded material possessing unusual physical properties (e.g. a quantum fluid). As temperature increases so does the concentration of ionised species leading ultimately to a plasma. Considerable improvements have recently been made in both the corresponding experimental and theoretical investigations. Here we review recent results for hydrogen and water that reveal unexpected routes of transformation to nonmolecular materials. We stress the importance of quantum effects, which remain significant even at high temperatures.
C1 Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Goncharov, AF (reprint author), Carnegie Inst Washington, Geophys Lab, 5251 Broad Branch Rd NW, Washington, DC 20015 USA.
EM goncharov@gl.ciw.edu
NR 107
TC 11
Z9 11
U1 3
U2 17
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0141-1594
J9 PHASE TRANSIT
JI Phase Transit.
PY 2007
VL 80
IS 10-12
BP 1051
EP 1072
DI 10.1080/01411590701473101
PG 22
WC Crystallography; Physics, Condensed Matter
SC Crystallography; Physics
GA 233UZ
UT WOS:000251117100006
ER

PT J
AU Manaa, MR
   Goldman, N
   Fried, LE
AF Manaa, M. R.
   Goldman, N.
   Fried, L. E.
TI New phases of hydrogen-bonded systems at extreme conditions
SO PHASE TRANSITIONS
LA English
DT Article
DE polymeric formic acid; superionic water; hydrogen bonding; Ab initio
   simulations; high pressure phases
ID EQUATION-OF-STATE; FORMIC-ACID; HIGH-PRESSURE; ELECTRICAL-CONDUCTIVITY;
   ICE-VII; GPA; CRYSTAL; DENSITY; WATER; H2O
AB We study the behaviour of hydrogen-bonded systems under high pressure and temperature. First principle calculations of formic acid under isotropic pressure up to 70 GPa reveal the existence of a polymerization phase around 20 GPa, in support of recent IR, Raman, and XRD experiments. In this phase, covalent bonding develops between molecules of the same chain through symmetrization of hydrogen bonds. We also performed molecular dynamics simulations of water at pressures up to 115 GPa and 2000 K. Along this isotherm, we are able to define three different phases. We observe a molecular fluid phase with superionic diffusion of the hydrogens for pressure 34-58 GPa. We report a transformation to a phase dominated by transient networks of symmetric O-H hydrogen bonds at 95-115 GPa. As in formic acid, the network can be attributed to the symmetrization of the hydrogen bond, similar to the ice VII-ice X transition.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Manaa, MR (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM manaa1@llnl.gov
RI Fried, Laurence/L-8714-2014
OI Fried, Laurence/0000-0002-9437-7700
NR 35
TC 5
Z9 5
U1 1
U2 7
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0141-1594
J9 PHASE TRANSIT
JI Phase Transit.
PY 2007
VL 80
IS 10-12
BP 1073
EP 1084
DI 10.1080/01411590701473135
PG 12
WC Crystallography; Physics, Condensed Matter
SC Crystallography; Physics
GA 233UZ
UT WOS:000251117100007
ER

PT J
AU Nowak, JD
   Mook, WM
   Minor, AM
   Gerberich, WW
   Carter, CB
AF Nowak, J. Deneen
   Mook, W. M.
   Minor, A. M.
   Gerberich, W. W.
   Carter, C. B.
TI Fracturing a nanoparticle
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID SILICON CLUSTERS; SIZE; TEMPERATURE; PLASTICITY; DEPOSITION; STRENGTH;
   TEM
AB Conventional wisdom and indirect studies suggest that the mechanical properties of nanoparticles can be considerably different than their bulk properties would predict. However, little is actually known about their mechanical behaviour because of the practical difficulties in investigating individual particles. Direct experimental studies of these properties require knowledge of the crystallographic orientation, size and microstructure of the nanoparticle in order to be complete. By deforming a single nanoparticle in the transmission electron microscope we have been able to determine each of these parameters of an isolated silicon nanoparticle a priori. With this approach, we could then directly examine dynamic deformation processes and demonstrate the first direct observation of plasticity-induced cleavage fracture of a silicon nanoparticle in compression.
C1 Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
RP Carter, CB (reprint author), Univ Minnesota, Dept Chem Engn & Mat Sci, 421 Washington Ave SE, Minneapolis, MN 55455 USA.
EM carter@cems.umn.edu
RI Carter, C. Barry/E-6478-2010
OI Carter, C. Barry/0000-0003-4251-9102
NR 27
TC 20
Z9 20
U1 0
U2 18
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PD JAN 1
PY 2007
VL 87
IS 1
BP 29
EP 37
DI 10.1080/14786430600876585
PG 9
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 110CD
UT WOS:000242355000003
ER

PT J
AU Zhang, S
   Han, Q
   Liu, ZK
AF Zhang, S.
   Han, Q.
   Liu, Z. -K.
TI Fundamental understanding of Na-induced high temperature embrittlement
   in Al-Mg alloys
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID TRACE IMPURITIES; MAGNESIUM ALLOYS; SODIUM; DUCTILITY
AB Sodium is an undesirable impurity in aluminium - magnesium alloys. In trace amounts it leads to high temperature embrittlement (HTE), due to intergranular fracture, which results in edge cracking during hot rolling. In the present work, the results of a thermodynamic investigation to elucidate the mechanism are presented. Correlations between HTE, phase formation, temperature and composition in Al-Mg alloys were determined. It is suggested that: (i) HTE is related to the formation of an intergranular Na-rich liquid phase, which significantly weakens the strength of grain boundaries; (ii) for a given Mg content, there exists a maximum Na content above which HTE cannot be avoided; and (iii) for a given alloy, a proper hot-rolling temperature should be chosen with respect to Na and Mg contents to suppress HTE. The HTE sensitive zone and a hot-rolling safe zone of Al-Mg-Na alloys are defined as functions of processing temperature and alloy composition. The tendency of HTE formation was evaluated based on thermodynamic simulations of phase fraction of the intergranular Na-rich liquid phase.
C1 Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
   Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA.
RP Zhang, S (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, POB 2008, Oak Ridge, TN 37831 USA.
EM zhangs@ornl.gov
RI Liu, Zi-Kui/A-8196-2009
OI Liu, Zi-Kui/0000-0003-3346-3696
NR 13
TC 7
Z9 7
U1 1
U2 1
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PD JAN 1
PY 2007
VL 87
IS 1
BP 147
EP 157
DI 10.1080/14786430600941587
PG 11
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 110CD
UT WOS:000242355000011
ER

PT J
AU Katzarov, IH
   Cawkwell, MJ
   Paxton, AT
   Finnis, MW
AF Katzarov, I. H.
   Cawkwell, M. J.
   Paxton, A. T.
   Finnis, M. W.
TI Atomistic study of ordinary (1)/(2) < 110] screw dislocations in
   single-phase and lamellar gamma-TiAl
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID BOND-ORDER POTENTIALS; PLASTIC-DEFORMATION; TITANIUM ALUMINIDE; ALLOYS;
   2-PHASE; STRESS; MICROSTRUCTURE; MECHANISMS; SIMULATION; DEPENDENCE
AB Computer simulation of the core structure and glide of ordinary 1/2 [110] screw dislocations in single-phase L1(0) TiAl and in two lamellae forming a twin gamma/gamma-interface has been performed using recently constructed Bond-Order Potentials (BOPs). BOPs represent a semi-empirical, numerically efficient scheme that works within the orthogonal tight-binding approximation and is able to capture the directionality of bonding. We have studied dislocation glide in perfect L10 TiAl and along a twin interface, transmission of an ordinary screw dislocation between lamellae, and the core structure, mobility and detachment of an interfacial 1/2 [110] screw dislocation from a twin boundary under applied shear stresses in directions parallel and perpendicular to a (111) plane. Our results show that the glide of ordinary 1/2 [110] straight screw dislocations under applied stresses in L1(0) TiAl is characterized by zigzag movement on two conjugated {111} planes. The non-planar core of the 1/2 (110] screw dislocation is distorted asymmetrically when the elastic centre of the dislocation is close to a twin gamma/gamma-interface and the dislocation moves on one of the (111) planes, depending on the magnitude of the corresponding Schmid factor. Ordinary dislocations become ordinary interfacial dislocations when they reach the interface. With increasing applied stress they can glide into the adjacent lamella, leaving no remnant interfacial dislocation.
C1 Queens Univ Belfast, Sch Math & Phys, Atomist Simulat Ctr, Belfast BT7 1NN, Antrim, North Ireland.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2AZ, England.
RP Katzarov, IH (reprint author), Queens Univ Belfast, Sch Math & Phys, Atomist Simulat Ctr, Belfast BT7 1NN, Antrim, North Ireland.
EM i.katzarov@qub.ac.uk
OI Cawkwell, Marc/0000-0002-8919-3368
NR 34
TC 12
Z9 13
U1 0
U2 9
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PY 2007
VL 87
IS 12
BP 1795
EP 1809
DI 10.1080/14786430601080252
PG 15
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 145UT
UT WOS:000244891800001
ER

PT J
AU Bartel, TP
   Specht, P
   Ho, JC
   Kisielowski, C
AF Bartel, T. P.
   Specht, P.
   Ho, J. C.
   Kisielowski, C.
TI Phase separation in InxGa1-xN
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID TRANSMISSION ELECTRON-MICROSCOPY; INGAN QUANTUM-WELLS; ATOMIC-SCALE;
   SPINODAL DECOMPOSITION; IMAGING CONDITIONS; EPITAXIAL LAYERS;
   MOLECULAR-BEAM; STRAIN; RESOLUTION; HETEROSTRUCTURES
AB Quantitative high-resolution transmission electron microscopy was used to study the distribution of indium atoms in InxGa1-xN alloys by strain mapping. In GaN/InxGa1-xN/GaN quantum wells with x < 0.1 we find that the sample thickness and the precision to which displacement fields can be extracted from a lattice image determine whether or not it is possible to discriminate between random alloy fluctuations and cluster formation. In miscible alloys such as SiGe or AlGaN a precision of better than 1 pm is required to reveal random alloy fluctuations, which presently exceeds experimental capabilities. In InxGa1-xN with x > 0.1, a precision of about 3 pm suffices to distinguish random alloy fluctuations from indium clusters that are present. Thick InxGa1-xN layers with x = 0.6 and x = 0.7 show phase separation with a wavelength between 2 and 4 nm and a fluctuation amplitude of Delta x = 0.10 and 0.15, respectively. This produces striped composition fluctuations, which are modulated by dot-like structures. The similarity of the fluctuation magnitudes in quantum wells and thick layers suggests that spinodal decomposition occurs in both materials and our results place the centre of the miscibility gap around x = 0.5-0.6.
C1 Tech Univ Berlin, Inst Festkorperphys, D-10623 Berlin, Germany.
   Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
   Lawrence Berkeley Natl Lab, Natl Ctr Electron Microscopy, Div Mat Sci, Berkeley, CA 94720 USA.
RP Bartel, TP (reprint author), Tech Univ Berlin, Inst Festkorperphys, Hardenbergstr 36, D-10623 Berlin, Germany.
EM TPBartel@lbl.gov
RI Bartel, Til/C-1098-2008; Ho, Johnny/K-5275-2012
OI Ho, Johnny/0000-0003-3000-8794
NR 42
TC 31
Z9 31
U1 3
U2 16
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND
SN 1478-6435
EI 1478-6443
J9 PHILOS MAG
JI Philos. Mag.
PY 2007
VL 87
IS 13
BP 1983
EP 1998
DI 10.1080/14786430601146905
PG 16
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 172OW
UT WOS:000246814600003
ER

PT J
AU Lee, SK
   Kim, TH
   Lee, SY
   Choi, KC
   Yang, P
AF Lee, S.-K.
   Kim, T.-H.
   Lee, S.-Y.
   Choi, K.-C.
   Yang, P.
TI High-brightness gallium nitride nanowire UV-blue light emitting diodes
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID CHEMICAL-VAPOR-DEPOSITION; DIELECTROPHORESIS; NANOPHOTONICS;
   ULTRAVIOLET; INTEGRATION; ALIGNMENT; WATER
AB We report on high-brightness GaN nanowire UV-blue light emitting diodes (LEDs), which are fabricated by coupling of n-GaN nanowires and p-GaN substrates using two assembly methods, random dispersion (RD) and dielectrophoresis assisted assembly deposition (DAAD). These GaN nanowire LEDs have bright UV-blue emission (411-437 nm) from the n-GaN nanowire/p-GaN substrate junction and the light emission is strong enough to be observed with the naked eye even for a single GaN nanowire LED. The results reported here should have significant implications for the fabrication of highly efficient, low-cost UV-blue LEDs with low power consumption, as compared to conventional thin-film based GaN LEDs.
C1 Chonbuk Natl Univ, SPRC, Dept Semicond Sci & Technol, Jeonju 561756, South Korea.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
RP Lee, SK (reprint author), Chonbuk Natl Univ, SPRC, Dept Semicond Sci & Technol, Jeonju 561756, South Korea.
EM sk_lee@chonbuk.ac.kr; p_yang@berkeley.edu
RI Lee, Seung-Yong/C-2492-2013
NR 24
TC 43
Z9 43
U1 4
U2 25
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PY 2007
VL 87
IS 14-15
BP 2105
EP 2115
DI 10.1080/14786430701199648
PG 11
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 172OX
UT WOS:000246814700003
ER

PT J
AU Wang, ZQ
   Beyerlein, IJ
   Lesar, R
AF Wang, Z. Q.
   Beyerlein, I. J.
   Lesar, R.
TI Dislocation motion in high strain-rate deformation
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID HIGH-SPEED DISLOCATIONS; PLASTIC-DEFORMATION; LOADING CONDITIONS;
   DYNAMICS; SIMULATIONS; BEHAVIOR; STRESS; METALS; MODEL
AB We present a systematic investigation of dislocation motion, dislocation interactions, and the collective behaviour of dislocations in high strain-rate deformation. Based on results from three-dimensional dislocation dynamics simulations, we find that employing the accurate, full-dynamics, equation of motion (i.e. that includes inertial effects) significantly changes the predictions of microstructural evolution and the macroscopic response compared to the commonly used overdamped equation of motion (i.e. with no inertial effects), especially at high strain rates (10(3)-10(6) s(-1)). While we find that inertial effects cannot be neglected, the net velocities are not high enough that 'relativistic' effects are important. We also present results on the effects of high strain rates on single-crystal deformation, which show good agreement with experimental trends, including increased hardening with increasing strain rate.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   Iowa State Univ, Ames, IA 50011 USA.
RP Wang, ZQ (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA.
EM zhiqiang@lanl.gov
RI LeSar, Richard/G-1609-2012; Beyerlein, Irene/A-4676-2011
NR 22
TC 23
Z9 23
U1 1
U2 9
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PY 2007
VL 87
IS 16-17
BP 2263
EP 2279
DI 10.1080/14786430601153422
PG 17
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 172OY
UT WOS:000246814900002
ER

PT J
AU Jankowski, AF
   Hayes, JP
   Saw, CK
AF Jankowski, A. F.
   Hayes, J. P.
   Saw, C. K.
TI Dimensional attributes in enhanced hardness of nanocrystalline Ta-V
   nanolaminates
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID MECHANICAL-PROPERTIES; MULTILAYERS; TANTALUM; STRAIN; AU/NI; FILMS
AB The scaling of microstructure to the nanoscale is a well-known method of enhancing the physical properties of many materials. New findings reveal a 10-fold enhancement in the hardness of nanocrystalline Ta and V nanolaminates is attributable to grain size effects, more so than the layer pair spacing. A Hall-Petch relationship of hardness with grain size appears in these body-centred-cubic nanocrystalline structures.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Jankowski, AF (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM alan.jankowski@ttu.edu
NR 23
TC 9
Z9 9
U1 2
U2 6
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PY 2007
VL 87
IS 16-17
BP 2323
EP 2334
DI 10.1080/14786430601175532
PG 12
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 172OY
UT WOS:000246814900006
ER

PT J
AU Lawson, AC
   Butt, DP
   Richardson, JW
   Li, J
AF Lawson, A. C.
   Butt, D. P.
   Richardson, J. W.
   Li, Ju
TI Thermal expansion and atomic vibrations of zirconium carbide to 1600K
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID ELASTIC PROPERTIES; TEMPERATURE; COPPER; ZRC; EQUATIONS; STATE;
   CONSTANTS; PRESSURE; SILICA; HEAT
AB We have measured the lattice constants and Debye-Waller factors of ZrC from 12 to 1600K using neutron diffraction. The data have been analyzed with the Gruneisen equation of state using an existing procedure for the Debye-Waller factors and a new procedure for the CTE that takes the temperature dependence of the elastic stiffness into account. The results of these measurements are in good agreement with previous measurements and with recent calculations. We have used the results of our measurements to estimate the melting point of ZrC with the Lindemann rule and obtain an estimate of 4000 K, in good agreement with the measured melting point of 3700K of this highly refractory material. This last result demonstrates the importance of anharmonic effects in determining the melting point.
C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
   Boise State Univ, Dept Mat Sci & Engn, Boise, ID 83725 USA.
   Argonne Natl Lab, Intense Pulsed Neutron Sci Div, Argonne, IL 60439 USA.
   Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA.
RP Lawson, AC (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, POB 1663, Los Alamos, NM 87545 USA.
EM aclawson@vla.com
RI Li, Ju/A-2993-2008; Butt, Darryl/B-7480-2008
OI Li, Ju/0000-0002-7841-8058; Butt, Darryl/0000-0003-4501-8864
NR 30
TC 14
Z9 14
U1 1
U2 9
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PY 2007
VL 87
IS 16-17
BP 2507
EP 2519
DI 10.1080/14786430701227548
PG 13
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 172OY
UT WOS:000246814900015
ER

PT J
AU Moore, KT
   Laughlin, DE
   Soderlind, P
   Schwartz, AJ
AF Moore, K. T.
   Laughlin, D. E.
   Soderlind, P.
   Schwartz, A. J.
TI Incorporating anisotropic electronic structure in crystallographic
   determination of complex metals: iron and plutonium
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID CRYSTAL-STRUCTURES; MAGNETIC ORDER; ALLOYS; PHASE; SPECTROSCOPY;
   TEMPERATURE; ALUMINUM; ELEMENTS; SOLIDS; CERIUM
AB Anisotropic electronic structure is incorporated in crystallographic determination of the structure of ferromagnetic Fe, delta-Pu and a Pu-3.7 at% Ga alloy. This is achieved by using anisotropic aspects of the inter-atomic bonds as a motif in combination with the high-symmetry cubic lattice. In the case of Fe, it is shown that ferromagnetic ordering reduces the symmetry of the structure from body centred cubic to body centred tetragonal with an associated effect on elasticity. Thus, the ferromagnetic alpha- and paramagnetic beta- phase are separate and unique phases that should both be addressed on the Fe phase diagrams. In the case of Pu, first-principles density-functional theory calculations are used to show that the bond strengths between the 12 nearest neighbours in delta-plutonium vary greatly. Employing the calculated bond strengths as a motif in crystallographic determination yields a structure with the monoclinic space group Cm for delta-Pu rather than face-centred cubic Fm (3) over barm. The reduced space group for delta-Pu illuminates why it is the only metal with a monoclinic ground state, why lattice distortions of the metal are viable and has implications for the behaviour of the material as it ages due to self-irradiation. Results for a Pu-3.7 at% Ga alloy show that the nearest neighbour bond strengths around a Ga atom are more uniform - a result that explains why Ga stabilizes face-centred cubic delta-Pu. This paper illustrates how an expansion of classical crystallography, which accounts for anisotropic electronic and magnetic structure, can explain complex materials in a novel way.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA.
RP Moore, KT (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM moore78@llnl.gov
NR 54
TC 6
Z9 7
U1 0
U2 6
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PY 2007
VL 87
IS 16-17
BP 2571
EP 2588
DI 10.1080/14786430701241697
PG 18
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 172OY
UT WOS:000246814900019
ER

PT J
AU Unal, B
   Evans, JW
   Lograsso, TA
   Ross, AR
   Jenks, CJ
   Thiel, PA
AF Unal, B.
   Evans, J. W.
   Lograsso, T. A.
   Ross, A. R.
   Jenks, C. J.
   Thiel, P. A.
TI Terrace-dependent nucleation of small Ag clusters on a five-fold
   icosahedral quasicrystal surface
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article; Proceedings Paper
CT 5th Aperiodic 2006 Conference
CY SEP 17-22, 2006
CL Zao, JAPAN
SP Int Union Crystallog, Commiss Aperiod Crystals
ID FILMS; GROWTH
AB Nucleation of Ag islands on the five-fold surface of icosahedral Al-Pd-Mn is influenced strongly by trap sites. Submonolayers of Ag prepared by deposition at 365K and with a flux of 1 x 10(-3) monolayers/s exhibit a variation in Ag island densities across different terraces. Comparisons with previous work and with rate equation analysis indicate that trap sites are not saturated under these experimental conditions and that the difference in island densities is not necessarily due to variation in trap densities. While it could have a number of different origins, our results point to a terrace-dependent value of the effective diffusion barrier for Ag adatoms.
C1 Iowa State Univ, Ames Lab, Dept Mat Sci & Engn, Ames, IA 50011 USA.
   Iowa State Univ, Ames Lab, Dept Chem, Ames, IA 50011 USA.
   Iowa State Univ, Ames Lab, Dept Math, Ames, IA 50011 USA.
RP Thiel, PA (reprint author), Iowa State Univ, Ames Lab, Dept Mat Sci & Engn, Ames, IA 50011 USA.
EM thiel@ameslab.gov
NR 11
TC 4
Z9 4
U1 0
U2 0
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PY 2007
VL 87
IS 18-21
BP 2995
EP 3001
DI 10.1080/14786430701364960
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 191HT
UT WOS:000248123000051
ER

PT J
AU Richard, ML
   Feuchtwanger, J
   Allen, SM
   O'Handley, RC
   Lazpita, P
   Barandiaran, JM
   Gutierrez, J
   Ouladdiaf, B
   Mondelli, C
   Lograsso, T
   Schlagel, D
AF Richard, M. L.
   Feuchtwanger, J.
   Allen, S. M.
   O'Handley, R. C.
   Lazpita, P.
   Barandiaran, J. M.
   Gutierrez, J.
   Ouladdiaf, B.
   Mondelli, C.
   Lograsso, T.
   Schlagel, D.
TI Chemical order in off-stoichiometric Ni-Mn-Ga ferromagnetic shape-memory
   alloys studied with neutron diffraction
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID NI2MNGA SINGLE-CRYSTALS; FIELD-INDUCED STRAIN; MAGNETIC-FIELD; HEUSLER
   ALLOYS; TEMPERATURE-DEPENDENCE; PHASE
AB The chemical order of three off-stoichiometry Ni-Mn-Ga compositions has been measured in the austenitic phase using powder and single-crystal neutron diffraction. The compositions studied, 48-52 at.% nickel, having excess manganese and deficient in gallium, are of technical interest due to the observed large room-temperature, magnetic-field-induced strain. It has been determined that compositions with less than 50% nickel have the excess Mn atoms occupying Ni and Ga sites. Compositions enriched in nickel are best fit with Ni atoms in excess of 50% occupying Mn sites while the excess and displaced Mn occupy Ga sites. The saturation magnetic moments calculated from the site occupations determined here and using Ni and Mn moments reported for Ni2MnGa, agree within 4% with the low-temperature measured moments.
C1 MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA.
   Inst Laue Langevin, F-38042 Grenoble, France.
   Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA.
RP Richard, ML (reprint author), MIT, Dept Mat Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
EM mrichard@mit.edu
RI D20, Diffractometer/O-3123-2013; Lazpita, Patricia/K-9887-2014; 
OI D20, Diffractometer/0000-0002-1572-1367; Lazpita,
   Patricia/0000-0002-8898-7713; Barandiaran Garcia, Jose
   Manuel/0000-0002-5402-9314
NR 25
TC 44
Z9 45
U1 2
U2 14
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PY 2007
VL 87
IS 23
BP 3437
EP 3447
DI 10.1080/14786430701297582
PG 11
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 191PT
UT WOS:000248144200006
ER

PT J
AU Puigvi, MA
   De Diego, N
   Serra, A
   Osetsky, YN
   Bacon, DJ
AF Puigvi, M. A.
   De Diego, N.
   Serra, A.
   Osetsky, Yu. N.
   Bacon, D. J.
TI On the interaction between a vacancy and self-interstitial atom clusters
   in metals
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID CASCADE DAMAGE CONDITIONS; DISPLACEMENT CASCADES; DEFECT ACCUMULATION;
   BCC METALS; COMPUTER-SIMULATION; NEUTRON-IRRADIATION;
   MOLECULAR-DYNAMICS; DISLOCATION LOOPS; ALPHA-ZIRCONIUM; MICROSTRUCTURE
   EVOLUTION
AB Atomic-scale computer simulation is used to study the interaction between a vacancy and a cluster of self-interstitial atoms in metals with hcp, fcc and bcc crystal structure: alpha-zirconium, copper and alpha-iron. Effects of cluster size, atomic structure, dislocation nature of the cluster side and temperature are investigated. A vacancy can recombine with any interstitial in small clusters and this does not affect cluster mobility. With increasing sizes clusters develop dislocation character and their interaction with vacancies depends on whether the cluster sides dissociate into partial dislocations. A vacancy recombines only on undissociated sides and corners created with undissociated segments. Vacancies inside the cluster perimeter do not recombine but restrict cluster mobility. Temperature enhances recombination by either increasing the number of recombination sites or assisting vacancy diffusion towards such sites. The results are discussed with relevance to differences in irradiation microstructure evolution of bcc, fcc and hcp metals and higher level theoretical modelling techniques.
C1 UPC, Dept Mat Aplicada 3, ETSECCPB, Barcelona 08034, Spain.
   UPC, CRNE, Barcelona 08034, Spain.
   Univ Complutense Madrid, Dept Fis Mat, E-28040 Madrid, Spain.
   Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA.
   Univ Liverpool, Dept Engn, Liverpool L69 3GH, Merseyside, England.
RP Serra, A (reprint author), UPC, Dept Mat Aplicada 3, ETSECCPB, 1-3 C2, Barcelona 08034, Spain.
EM a.serra@upc.edu
OI Serra, Anna/0000-0002-8754-5649; Osetskiy, Yury/0000-0002-8109-0030
NR 48
TC 6
Z9 6
U1 1
U2 17
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PY 2007
VL 87
IS 23
BP 3501
EP 3517
DI 10.1080/14786430701326985
PG 17
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 191PT
UT WOS:000248144200010
ER

PT J
AU Radmilovic, V
   Taylor, C
   Lee, Z
   Tolley, A
   Mitlin, D
   Dahmen, U
AF Radmilovic, V.
   Taylor, C.
   Lee, Z.
   Tolley, A.
   Mitlin, D.
   Dahmen, U.
TI Nanoindentation properties and the microstructure of grain boundary
   precipitate-free zones (PFZs) in an AlCuSiGe alloy
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID SI-GE-CU; AL-SI; ELECTRON-MICROSCOPE; METALS; DYNAMICS; VICINITY;
   SYSTEM; STEELS; MG
AB We have characterized the nanoscale mechanical properties of grain boundary precipitate-free zones (PFZ's) in an AlCuSiGe alloy, using combined nanoindentation and in-situ atomic force microscopy (AFM). These mechanical properties were then correlated to the composition, precipitate distribution and, indirectly, to the vacancy concentration within these regions, as analyzed by transmission electron microscopy and spectroscopy. Using these results we constructed a structure-zone map of the area adjacent to the grain boundary, which relates the reduced elastic modulus and nanoindentation hardness of the alloy to its graded microstructure. Our analysis indicates that the lowest hardness was found in the region where no precipitates are present at all, regardless of solute concentration. In regions where precipitation is different from that of the bulk, somewhat inferior mechanical properties are achieved.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
   Virginia Commonwealth Univ, Dept Mech Engn, Richmond, VA 23284 USA.
   Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G6, Canada.
RP Radmilovic, V (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, MS-72,1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM VRRadmilovic@lbl.gov
RI Lee, Zonghoon/G-1474-2011; Taylor, Curtis/J-6236-2013; Mitlin , David
   /M-5328-2016
OI Lee, Zonghoon/0000-0003-3246-4072; Taylor, Curtis/0000-0001-9184-5487;
   Mitlin , David /0000-0002-7556-3575
NR 37
TC 2
Z9 2
U1 2
U2 5
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PY 2007
VL 87
IS 26
BP 3905
EP 3919
DI 10.1080/14786430601153414
PG 15
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 199VG
UT WOS:000248722700002
ER

PT J
AU Demkowicz, MJ
   Argonz, AS
   Farkas, D
   Frary, M
AF Demkowicz, M. J.
   Argonz, A. S.
   Farkas, D.
   Frary, M.
TI Simulation of plasticity in nanocrystalline silicon
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID MOLECULAR-DYNAMICS SIMULATION; MODEL ATOMIC GLASS; AMORPHOUS-SILICON;
   STRUCTURAL RELAXATIONS; DEFORMATION; TRANSITION; METALS
AB Molecular dynamics investigation of plasticity in a model nanocrystalline silicon system demonstrates that inelastic deformation localizes in intergranular regions. The carriers of plasticity in these regions are atomic environments, which can be described as high-density liquid-like amorphous silicon. During fully developed flow, plasticity is confined to system-spanning intergranular zones of easy flow. As an active flow zone rotates out of the plane of maximum resolved shear stress during deformation to large strain, new zones of easy flow are formed. Compatibility of the microstructure is accommodated by processes such as grain rotation and formation of new grains. Nano-scale voids or cracks may form if stress concentrations emerge which cannot be relaxed by a mechanism that simultaneously preserves microstructural compatibility.
C1 Los Alamos Natl Lab, Struct Property Relat Grp MST 8, Los Alamos, NM 87545 USA.
   MIT, Dept Mech Engn, Cambridge, MA 02139 USA.
   Virginia Polytech Inst & State Univ, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA.
   Boise State Univ, Dept Mat Sci & Engn, Boise, ID 83725 USA.
RP Demkowicz, MJ (reprint author), Los Alamos Natl Lab, Struct Property Relat Grp MST 8, POB 1663, Los Alamos, NM 87545 USA.
EM demkowicz@lanl.gov
NR 45
TC 37
Z9 37
U1 0
U2 6
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PY 2007
VL 87
IS 28
BP 4253
EP 4271
DI 10.1080/14786430701358715
PG 19
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 216PK
UT WOS:000249890600001
ER

PT J
AU Lebensohn, RA
   Tome, CN
   Castaneda, PP
AF Lebensohn, R. A.
   Tome, C. N.
   Castaneda, P. Ponte
TI Self-consistent modelling of the mechanical behaviour of viscoplastic
   polycrystals incorporating intragranular field fluctuations
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID CHANNEL ANGULAR EXTRUSION; TEXTURE DEVELOPMENT; NONLINEAR COMPOSITES;
   PLASTIC-DEFORMATION; SEISMIC ANISOTROPY; ROLLING TEXTURES; NUMERICAL
   SIMULATIONS; STRAIN HETEROGENEITY; HEXAGONAL MATERIALS;
   HIGH-TEMPERATURES
AB We present a detailed description of the numerical implementation, within the widely used viscoplastic self-consistent (VPSC) code, of a rigorous second-order ( SO) homogenization procedure for non-linear polycrystals. The method is based on a linearization scheme, making explicit use of the covariance of the fluctuations of the local fields in a certain linear comparison material, whose properties are, in turn, determined by means of a suitably designed variational principle. We discuss the differences between this second-order approach and several first-order self-consistent (SC) formulations ( secant, tangent and affine approximations) by comparing their predictions with exact full-field solutions. We do so for crystals with different symmetries, as a function of anisotropy, number of independent slip systems and degree of non-linearity. In this comparison, the second-order estimates show the best overall agreement with the full-field solutions. Finally, the different SC approaches are applied to simulate texture evolution in two strongly heterogeneous systems and, in both cases, the SO formulation yields results in better agreement with experimental evidence than the first-order approximations. In the case of cold-rolling of low-SFE fcc polycrystals, the SO formulation predicts the formation of a texture with most of the characteristic features of a brass-type texture. In the case of polycrystalline ice, deforming in uniaxial compression to large strain, the SO predicts a substantial and persistent accommodation of deformation by basal slip, even when the basal poles become strongly aligned with the compression direction.
C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
   Univ Penn, Dept Mech Engn & Appl Mech, Philadelphia, PA 19104 USA.
RP Lebensohn, RA (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, POB 1663, Los Alamos, NM 87545 USA.
EM lebenso@lanl.gov
RI Ponte Castaneda, Pedro/B-1834-2008; Lebensohn, Ricardo/A-2494-2008;
   Tome, Carlos/D-5058-2013
OI Ponte Castaneda, Pedro/0000-0003-2565-8899; Lebensohn,
   Ricardo/0000-0002-3152-9105; 
NR 98
TC 120
Z9 121
U1 2
U2 32
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PY 2007
VL 87
IS 28
BP 4287
EP 4322
DI 10.1080/14786430701432619
PG 36
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 216PK
UT WOS:000249890600003
ER

PT J
AU Rao, SI
   Dimiduk, DM
   Tang, M
   Parthasarathy, TA
   Uchic, MD
   Woodward, C
AF Rao, S. I.
   Dimiduk, D. M.
   Tang, M.
   Parthasarathy, T. A.
   Uchic, M. D.
   Woodward, C.
TI Estimating the strength of single-ended dislocation sources in
   micron-sized single crystals
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID UNIAXIAL COMPRESSION; PLASTICITY; SCALE; DEFORMATION; SIMULATION;
   DYNAMICS
AB Three-dimensional (3D) discrete dislocation dynamics simulations were used to calculate the effects of anisotropy of dislocation line tension ( increasing Poisson's ratio, nu) on the strength of single-ended dislocation sources in micron-sized volumes with free surfaces and to compare them with the strength of double-ended sources of equal length. Their plastic response was directly modelled within a 1 mu m(3) volume composed of a single crystal fcc metal. In general, double-ended sources are stronger than single-ended sources of an equal length and exhibit no significant effects from truncating the long-range elastic fields at this scale. The double-ended source strength increases with nu, exhibiting an increase of about 50% at nu = 0.38 ( value for Ni) as compared to the value at nu=0. Independent of dislocation line direction, for nu greater than 0.20, the strengths of single-ended sources depend upon the sense of the stress applied. The value for alpha in the expression for strength, tau = alpha(L)mu b/L is shown to vary from 0.4 to 0.84 depending on the character of the dislocation and the direction of operation of the source at nu = 0.38 and L = 933b. By varying the lengths of the sources from 933 to 233b, it was shown that the scaling of the strength of single-ended and double-ended sources with their length both follow a ln(L/b)/(L/b) dependence. Surface image stresses are shown to have little effect on the critical stress of single-ended sources at a length of similar to 250b or greater. This suggests that for 3D discrete dislocation dynamics simulations of the plastic deformation of micron-sized crystals in the size range 0.5-20 mu m, image stresses making the surface traction-free can be neglected. The relationship between these findings and a recent statistical model for the hardening of small volumes is discussed.
C1 Air Force Res Lab, AFRL MLLM, Wright Patterson AFB, OH 45433 USA.
   Universal Energy Syst Inc, Dayton, OH 45432 USA.
   Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
   Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.
RP Rao, SI (reprint author), Air Force Res Lab, AFRL MLLM, Wright Patterson AFB, OH 45433 USA.
EM Satish.Rao@wpafb.af.mil
RI Parthasarathy, Triplicane/B-7146-2011
OI Parthasarathy, Triplicane/0000-0002-5449-9754
NR 31
TC 83
Z9 84
U1 2
U2 31
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PY 2007
VL 87
IS 30
BP 4777
EP 4794
DI 10.1080/14786430701591513
PG 18
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 216PM
UT WOS:000249890800006
ER

PT J
AU Pond, RC
   Ma, X
   Hirth, JP
   Mitchell, TE
AF Pond, R. C.
   Ma, X.
   Hirth, J. P.
   Mitchell, T. E.
TI Disconnections in simple and complex structures
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID HCP METALS; INTERFACES; DEFECTS; DISLOCATIONS; TRANSFORMATIONS;
   CRYSTALLOGRAPHY; BOUNDARY; STRESS; GROWTH; FIELDS
AB Disconnections are interfacial defects with dislocation and step character; for example, twinning dislocations in homo-phase and transformation dislocations in hetero-phase materials. They play important structural roles and are classified as either 'perfect', separating energetically degenerate regions of interface, or 'partial', bounding a faulted region. In kinetic mechanisms, disconnection motion can be glissile, by conservative climb or climb. In the present paper, disconnection mobility is analyzed in terms of shear and shuffle-type atomic displacements and diffusional flux. This is applied to a sequence of hetero-phase materials with increasing structural complexity, namely the beta to alpha transformation in Ti, theta' precipitation in Al(Cu) and the orthorhombic to monoclinic martensitic transformation in ZrO2. A disconnection source mechanism in Ti, involving conservative climb, is also described.
C1 Univ Liverpool, Dept Engn, Liverpool L69 3BX, Merseyside, England.
   Los Alamos Natl Lab, Struct Property Relat Grp, Los Alamos, NM 87545 USA.
RP Pond, RC (reprint author), Univ Liverpool, Dept Engn, Brownlow Hill, Liverpool L69 3BX, Merseyside, England.
EM r.c.pond@liverpool.ac.uk
NR 32
TC 12
Z9 12
U1 3
U2 20
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PY 2007
VL 87
IS 33
BP 5289
EP 5307
DI 10.1080/14786430701651721
PG 19
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 229BT
UT WOS:000250777000008
ER

PT J
AU Tsuchiya, M
   Minor, AM
   Ramanathan, S
AF Tsuchiya, M.
   Minor, A. M.
   Ramanathan, S.
TI Size-dependent phase transformations in nanoscale pure and Y-doped
   zirconia thin films
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID TETRAGONAL ZIRCONIA; IONIC-CONDUCTIVITY; GATE DIELECTRICS;
   CRYSTALLIZATION; BOUNDARY; MICROSTRUCTURE; STABILIZATION; SEGREGATION;
   STABILITY
AB Phase stability in nanoscale pure zirconia and 9.5 mol.% yttria-doped zirconia (YDZ) thin films was studied by in-situ transmission electron microscopy. Oxygen vacancies are found to play a significant role in determining the microstructure and phase evolution. Pure zirconia thin films of similar to 52nm thickness were stabilized without any dopants at room temperature, whereas they transformed into a tetragonal phase upon heating to 400 degrees C. On the other hand, 9.5% yttria doping enables stabilization of the cubic structure regardless of grain growth. Annealing of amorphous YDZ films in air (oxygen-rich) leads to tetragonal phase formation, whereas ultrahigh vacuum (oxygen-deficient) annealed samples display a cubic phase at high temperature. Detailed discussions on the effects of initial microstructure, oxygen deficiency, aliovalent doping and thickness are presented.
C1 [Tsuchiya, M.; Ramanathan, S.] Harvard Univ, Harvard Sch Engn & Appl Sci, Cambridge, MA 02138 USA.
   [Minor, A. M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
RP Ramanathan, S (reprint author), Harvard Univ, Harvard Sch Engn & Appl Sci, Cambridge, MA 02138 USA.
EM shriram@seas.harvard.edu
NR 26
TC 11
Z9 11
U1 1
U2 6
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PY 2007
VL 87
IS 36
BP 5673
EP 5684
DI 10.1080/14786430701708349
PG 12
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 257VH
UT WOS:000252826300002
ER

PT J
AU Calderon, HA
   Kisielowski, C
   Mori, T
AF Calderon, H. A.
   Kisielowski, C.
   Mori, T.
TI Statistical analysis of gamma ' quartet split patterns in gamma-gamma '
   Ni alloys revealed by high resolution electron microscopy
SO PHILOSOPHICAL MAGAZINE LETTERS
LA English
DT Article
ID ELASTIC INTERACTION ENERGY; ELLIPSOIDAL INCLUSION; EVOLUTION; FIELD;
   SHAPE; PRECIPITATE; MEDIA; AL
AB The frequencies of adjacent gamma' pairs having in-phase and out-of-phase relationships in quartet configurations, determined by high resolution electron microscopy [Calderon et al., Phil. Mag. Lett. 85 51 (2005)], were examined in detail for gamma - gamma' Ni alloys. A total of 40 pairs in 10 quartets were used to provide a statistical analysis. The frequency of out-of-phase pairs is 78%. It was found that none of the 10 quartets examined had constituting gamma' particles belonging to the same translational order domain. Consequently, there were always Lit least two out-of-phase adjacent pairs in any quartet. It is concluded that the quartet split patterns in gamma - gamma' Ni alloys are not caused by the splitting of gamma' particles, but are produced by the migration of particles due to diffusion, these particles having been precipitated separately and independently prior to migration. Ail elasticity calculation is provided to show that two gamma' particles migrate to align along (001) when their initial position deviates from this direction.
C1 Inst Politecn Nacl, ESFM, Dept Ciencia Mat, Mexico City, DF, Mexico.
   LBNL, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
   Univ Manchester, Ctr Mat Sci, Manchester, Lancs, England.
RP Calderon, HA (reprint author), Inst Politecn Nacl, ESFM, Dept Ciencia Mat, Mexico City, DF, Mexico.
EM hcalderon@ipn.mx
NR 14
TC 1
Z9 1
U1 1
U2 1
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0950-0839
J9 PHIL MAG LETT
JI Philos. Mag. Lett.
PD JAN
PY 2007
VL 87
IS 1
BP 33
EP 40
DI 10.1080/09500830601096874
PG 8
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 138UH
UT WOS:000244388300005
ER

PT J
AU Mendelev, MI
   Ackland, GJ
AF Mendelev, M. I.
   Ackland, G. J.
TI Development of an interatomic potential for the simulation of phase
   transformations in zirconium
SO PHILOSOPHICAL MAGAZINE LETTERS
LA English
DT Article
ID CLOSE-PACKED METALS; ALPHA-ZR; MOLECULAR-DYNAMICS; DEFECT PROPERTIES;
   DIFFUSION; ALLOYS; POINT; MODEL; ALUMINUM
AB In recent years, some 30 studies have been published on the molecular dynamics ( MD) of zirconium, primarily of its twinning deformation and response to radiation damage. Its low thermal neutron absorption makes it uniquely suited for the latter application. Surprisingly, currently used interatomic potentials do not encapsulate the unique properties of Zr, namely its high stacking-fault energy, anomolous self-diffusion, melting and phase transformation under temperature and pressure ( or alloying). Ab initio calculations have shown deficiencies in the description of point defects, both vacancies and interstitials, using existing interatomic potentials, deficiencies that can now be rectified by refitting. Here, we show the calculation of phase transitions self-consistently and present a potential for Zr that correctly reproduces the energetics of our extended database of ab initio configurations and high-temperature phase transitions. The potential has an analytic many-body form, making it suitable for existing large-scale MD codes. We also present a best-fit potential for the hcp structure and its defects.
C1 Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA.
   Univ Edinburgh, Ctr Sci Extreme Condit, Sch Phys, Edinburgh EH9 3JZ, Midlothian, Scotland.
RP Mendelev, MI (reprint author), Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA.
EM mendelev@ameslab.gov
RI Ackland, Graeme/H-2215-2015
OI Ackland, Graeme/0000-0002-1205-7675
NR 32
TC 109
Z9 114
U1 4
U2 41
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.
PY 2007
VL 87
IS 5
BP 349
EP 359
DI 10.1080/09500830701191393
PG 11
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 164WB
UT WOS:000246264400005
ER

PT J
AU Speer, JG
   Hackenberg, RE
   Decooman, BC
   Matlock, DK
AF Speer, J. G.
   Hackenberg, R. E.
   Decooman, B. C.
   Matlock, D. K.
TI Influence of interface migration during annealing of
   martensite/austenite mixtures
SO PHILOSOPHICAL MAGAZINE LETTERS
LA English
DT Article
ID AUSTENITE; CARBON
AB Tempering of martensite in the absence of carbide precipitation leads to carbon partitioning into retained austenite. If the martensite/austenite interface is assumed to remain stationary during this process, the phase compositions reach a condition that has recently been called constrained carbon equilibrium. If iron atoms are sufficiently mobile at the interface, longer partitioning times may lead to migration of the ferrite/ austenite interface. The interface may be expected to move in either direction, depending on the specific details of the phase fractions and compositions controlling the chemical potential of iron at the interface. If interface migration occurs during carbon partitioning, the situation is more complicated and conditions could exist where the interface moves first in one direction and then the other.
C1 Colorado Sch Mines, Dept Met & Mat Engn, Golden, CO 80401 USA.
   Los Alamos Natl Lab, Mat Sci & Technol Div MST6, Los Alamos, NM 87545 USA.
   Pohang Inst Sci & Technol, Grad Inst Ferrous Technol, Pohang 790784, Kyungbuk, South Korea.
RP Speer, JG (reprint author), Colorado Sch Mines, Dept Met & Mat Engn, Golden, CO 80401 USA.
EM jspeer@mines.edu
OI Hackenberg, Robert/0000-0002-0380-5723
NR 5
TC 28
Z9 36
U1 0
U2 11
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.
PY 2007
VL 87
IS 6
BP 379
EP 382
DI 10.1080/09500830701194173
PG 4
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 164WM
UT WOS:000246265500002
ER

PT J
AU Serra, A
   Bacon, DJ
   Osetsky, YN
AF Serra, A.
   Bacon, D. J.
   Osetsky, Yu. N.
TI Strengthening and microstructure modification associated with moving
   twin boundaries in hcp metals
SO PHILOSOPHICAL MAGAZINE LETTERS
LA English
DT Article
ID COMPUTER-SIMULATION; EDGE DISLOCATIONS; AB-INITIO; ZIRCONIUM; MODEL;
   DEFECT; DYNAMICS; MOTION; ZR
AB The interaction of a moving {10 (1) over bar2} twin boundary with clusters of self-interstitial atoms and vacancies, containing up to 35 point defects, has been studied by atomic computer simulation in a model crystal of alpha-zirconium. Conservative movement of the boundary has been achieved by glide of twinning dislocations of edge character under applied shear stress. Several reactions were observed, the result depending on cluster orientation and location relative to the glide plane of the twinning dislocation. They include: (i) restriction of twin boundary mobility; (ii) change of cluster orientation and shape; (iii) glissile cluster drag by the boundary without contact; and (iv) total or partial absorption of a cluster by the twin boundary and cluster drag, together with simultaneous glide along the interface. It is concluded that the applied shear stress for motion of twin boundaries is raised by interaction with point defect clusters. Furthermore, moving twin boundaries act as defect sinks or recombination centres and provide a means for removing defects from regions of radiation damage.
C1 Univ Politecn Catalunya, ETSECCPB, Dept Matemat Aplicada 3, ES-08034 Barcelona, Spain.
   Univ Liverpool, Dept Engn, Liverpool L69 3GH, Merseyside, England.
   Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
RP Serra, A (reprint author), Univ Politecn Catalunya, ETSECCPB, Dept Matemat Aplicada 3, Jordi Girona 1-3, ES-08034 Barcelona, Spain.
EM a.serra@upc.edu
OI Serra, Anna/0000-0002-8754-5649; Osetskiy, Yury/0000-0002-8109-0030
NR 22
TC 7
Z9 7
U1 5
U2 19
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.
PY 2007
VL 87
IS 7
BP 451
EP 459
DI 10.1080/09500830701244812
PG 9
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 171ZI
UT WOS:000246773500001
ER

PT J
AU Morrall, P
   Price, DW
   Nelson, AJ
   Siekhaus, WJ
   Nelson, E
   Wu, KJ
   Stratman, M
   McLean, W
AF Morrall, P.
   Price, D. W.
   Nelson, A. J.
   Siekhaus, W. J.
   Nelson, E.
   Wu, K. J.
   Stratman, M.
   McLean, W., II
TI ToF-SIMS characterization of uranium hydride
SO PHILOSOPHICAL MAGAZINE LETTERS
LA English
DT Article
ID CORRELATION-ENERGY; DENSITY; APPROXIMATION; ION; EXCHANGE
AB Time-of-flight secondary-ion mass spectrometry (ToF-SIMS) has been employed for the first time to investigate uranium hydride. The deuterated form of uranium hydride (UD3) was formed on a polycrystalline uranium sample by exposure to high-purity D-2 gas at room temperature. The characteristic positive and negative secondary-ion fragments observed from uranium hydride are reported and assigned. Our investigations show that negative-ion fragments provide the most unambiguous method for identification of uranium hydride, through the detection of UH2- and UH4- fragments. In addition, density functional theory (DFT) calculations are presented which confirm the identity and stability of, and also assign structural geometries to, the ion fragments observed within the SIMS experiment. The DFT calculations show that UH2+/- ions adopt a linear arrangement, whereas positive tri- and tetrahydride ions ( UH3+, UH4+) adopt structures based on square planar geometries, although negative tri- and tetrahydride ions (UH3-, UH4-) adopt structures based on tetrahedral geometries.
C1 AWE, Reading RG7 4PR, Berks, England.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Morrall, P (reprint author), AWE, Reading RG7 4PR, Berks, England.
EM peter.morrall@awe.co.uk
RI Price, David/B-5017-2013
NR 17
TC 6
Z9 7
U1 2
U2 19
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.
PY 2007
VL 87
IS 8
BP 541
EP 547
DI 10.1080/09500830701286227
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 186EW
UT WOS:000247762900003
ER

PT J
AU Detor, AJ
   Miller, MK
   Schuh, CA
AF Detor, A. J.
   Miller, M. K.
   Schuh, C. A.
TI Measuring grain-boundary segregation in nanocrystalline alloys: direct
   validation of statistical techniques using atom probe tomography
SO PHILOSOPHICAL MAGAZINE LETTERS
LA English
DT Article
ID NI-3.6 AT.PERCENT P; SOLUTE SEGREGATION; THERMAL-STABILITY
AB Atom probe tomography (APT) is used to investigate grain-boundary segregation of W solute atoms in nanocrystalline Ni. For the heat-treated specimens used here, the grain structure can be observed in the APT data, enabling direct composition analyses across individual grain boundaries. These direct measurements are used to validate methods proposed in earlier work, which determine the average segregation state in nanocrystalline materials through statistical analysis of the solute distribution, without knowledge of the boundary positions. Good agreement is demonstrated between the two experimental techniques.
C1 MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA.
   Oak Ridge Natl Lab, Microscopy Grp, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Schuh, CA (reprint author), MIT, Dept Mat Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
EM schuh@mit.edu
RI Schuh, Christopher/C-7947-2009
NR 14
TC 32
Z9 32
U1 1
U2 25
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.
PY 2007
VL 87
IS 8
BP 581
EP 587
DI 10.1080/09500830701400125
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 186EW
UT WOS:000247762900009
ER

PT J
AU Epp, RG
   Erickson, DJ
   Paul, ND
   Sulzberger, B
AF Epp, R. G.
   Erickson, D. J., III
   Paul, N. D.
   Sulzberger, B.
TI Interactive effects of solar UV radiation and climate change on
   biogeochemical cycling
SO PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
LA English
DT Review
ID DISSOLVED ORGANIC-MATTER; ULTRAVIOLET-B RADIATION; SOUTHEASTERN
   UNITED-STATES; ELEVATED ATMOSPHERIC CO2; PHOTO-FENTON REACTION; BIRCH
   BETULA-PENDULA; TIERRA-DEL-FUEGO; NATURAL-WATERS; CARBON-DIOXIDE;
   METHYL-BROMIDE
AB This report assesses research on the interactions of UV radiation (280-400 nm) and global climate change with global biogeochemical cycles at the Earth's surface. The effects of UV-B (280-315 nm), which ate dependent on the stratospheric ozone layer, on biogeochemical cycles are often linked to concurrent exposure to UV-A radiation (315-400 nm), which is influenced by global climate change. These interactions involving UV radiation (the combination of UV-B and UV-A) are central to the prediction and evaluation of future Earth environmental conditions. There is increasing evidence that elevated UV-B radiation has significant effects on the terrestrial biosphere with implications for the cycling of carbon, nitrogen and other elements. The cycling of carbon and inorganic nutrients such as nitrogen can be affected by UV-B-mediated changes in communities of soil organisms, probably due to the effects of UV-B radiation on plant root exudation and/or the chemistry of dead plant material falling to the soil. In and environments direct photodegraclation can play a major role in the decay of plant litter, and UV-B radiation is responsible for a significant part of this photodegraclation. UV-B radiation strongly influences aquatic carbon, nitrogen, sulfur and metals cycling that affect a wide range of life processes. UV-B radiation changes the biological availability of dissolved organic matter to microorganisms, and accelerates its transformation into dissolved inorganic carbon and nitrogen, including carbon dioxide and ammonium. The coloured part of dissolved organic matter (CDOM) controls the penetration of UV radiation into water bodies, but CDOM is also photodegraded by solar UV radiation. Changes in CDOM influence the penetration of UV radiation into water bodies with major consequences for aquatic biogeochemical processes. Changes in aquatic primary productivity and decomposition due to climate-related changes in circulation and nutrient supply occur concurrently with exposure to increased UV-B radiation, and have synergistic effects on the penetration of light into aquatic: ecosystems. Future changes in climate will enhance stratification of lakes and the ocean, which will intensify photodegradation of CDOM by UV radiation. The resultant increase in the transparency of water bodies may increase UV-B effects on aquatic biogeochemistry in the surface layer. Changing solar UV radiation and climate also interact to influence exchanges of trace gases, such as halocarbons (e.g., methyl bromide) which influence ozone depletion, and sulfur gases (e.g., dimethylsulfide) that oxidize to produce sulfate aerosols that cool the marine atmosphere. UV radiation affects the biological availability of iron, copper and other trace metals in aquatic environments thus potentially affecting metal toxicity and the growth of phytoplankton and other microorganisms that are involved in carbon and nitrogen cycling. Future changes in ecosystem distribution due to alterations in the physical and chemical climate interact with ozone-modulated changes in UV-B radiation. These interactions between the effects of climate change and UV-B radiation on biogeochemical cycles in terrestrial and aquatic, systems may partially offset the beneficial effects of an ozone recovery.
C1 US EPA, Natl Exposure Res Lab, Athens, GA 30605 USA.
   Oak Ridge Natl Lab, Computat Earth Sci Grp, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
   Univ Lancaster, Lancaster Environm Ctr, Dept Biol Sci, Lancaster LA1 4YQ, England.
   Swiss Fed Inst Aquat Sci & Technol, Eawag, CH-8600 Dubendorf, Switzerland.
RP Epp, RG (reprint author), US EPA, Natl Exposure Res Lab, 960 Coll Stn Rd, Athens, GA 30605 USA.
RI Paul, Nigel/E-5350-2014
OI Paul, Nigel/0000-0001-6959-4239
NR 209
TC 7
Z9 7
U1 5
U2 45
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
   ENGLAND
SN 1474-905X
EI 1474-9092
J9 PHOTOCH PHOTOBIO SCI
JI Photochem. Photobiol. Sci.
PY 2007
VL 6
IS 3
BP 286
EP 300
DI 10.1039/b700021a
PG 15
WC Biochemistry & Molecular Biology; Biophysics; Chemistry, Physical
SC Biochemistry & Molecular Biology; Biophysics; Chemistry
GA 143QX
UT WOS:000244739000018
ER

PT J
AU Ai, X
   Xu, Q
   Jones, M
   Song, Q
   Ding, SY
   Ellingson, RJ
   Himmel, M
   Rumbles, G
AF Ai, Xin
   Xu, Qi
   Jones, Marcus
   Song, Qing
   Ding, Shi-You
   Ellingson, Randy J.
   Himmel, Mike
   Rumbles, Garry
TI Photophysics of (CdSe) ZnS colloidal quantum dots in an aqueous
   environment stabilized with amino acids and genetically-modified
   proteins
SO PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
LA English
DT Article
ID OPTICAL-PROPERTIES; N-BUTYLAMINE; NANOCRYSTALS; BINDING; DYNAMICS;
   ELECTRON; NANOPARTICLES; DERIVATIVES; RELAXATION; CELLULOSE
AB Using a combination of two amino acids, histidine and N-acetyl-cysteine, to replace the original organic capping groups of (CdSe) ZnS quantum dots, water-soluble and highly luminescent (CdSe) ZnS quantum dots have been successfully prepared at pH 8. Characterization by steady-state and time-resolved photoluminescence spectroscopy, and transient absorption spectroscopy, demonstrate that the electronic properties of these quantum dots exceed those of the original as-synthesized samples dissolved in a more-conventional organic solvent. Furthermore, these amino acid-stabilized quantum dots have been assembled onto a cellulose substrate via cellulose binding proteins that specifically bind to cellulose and was genetically engineered to harbor dual hexahistidine tags at the N- and C- termini to confer binding with the zinc( II) on the quantum dot surface. The spectroscopic measurements show that the protein-bound quantum dots continue to retain their desirable electronic properties when bound on the substrate. Meanwhile, the specific and very selective binding properties of the proteins have remained effective.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Rumbles, G (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM garry_rumbles@nrel.gov
RI Jones, Marcus/B-3291-2008; Ellingson, Randy/H-3424-2013; Ding,
   Shi-You/O-1209-2013; 
OI Jones, Marcus/0000-0001-9912-1168; Rumbles, Garry/0000-0003-0776-1462
NR 38
TC 16
Z9 17
U1 0
U2 14
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
   ENGLAND
SN 1474-905X
J9 PHOTOCH PHOTOBIO SCI
JI Photochem. Photobiol. Sci.
PY 2007
VL 6
IS 9
BP 1027
EP 1033
DI 10.1039/b706471c
PG 7
WC Biochemistry & Molecular Biology; Biophysics; Chemistry, Physical
SC Biochemistry & Molecular Biology; Biophysics; Chemistry
GA 203PH
UT WOS:000248986000022
PM 17721603
ER

PT S
AU Goldberg, KA
   Naulleau, PP
   Barty, A
   Rekawa, SB
   Kemp, CD
   Gunion, RF
   Salmassi, F
   Gullikson, EM
   Anderson, EH
   Han, HS
AF Goldberg, Kenneth A.
   Naulleau, Patrick P.
   Barty, Anton
   Rekawa, Senajith B.
   Kemp, Charles D.
   Gunion, Robert F.
   Salmassi, Farhad
   Gullikson, Eric M.
   Anderson, Erik H.
   Han, Hak-Seung
BE Naber, RJ
TI Performance of actinic EUVL mask imaging using a zoneplate microscope -
   art. no. 67305E
SO PHOTOMASK TECHNOLOGY 2007, PTS 1-3
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT 27th Annual BACUS Symposium on Photomask Technology
CY SEP 18-21, 2007
CL Monterey, CA
SP BACUS, SPIE Int Tech Grp
DE extreme ultraviolet lithography; EUV; mask inspection; zoneplate;
   imaging; actinic inspection
ID LITHOGRAPHY; INSPECTION; TOOL
AB The SEMATECH Berkeley Actinic Inspection Tool (AIT) is a dual-mode, scanning and imaging extreme-ultraviolet (EUV) microscope designed for pre-commercial EUV mask research. Dramatic improvements in image quality have been made by the replacement of several critical optical elements, and the introduction of scanning illumination to improve uniformity and contrast. We report high quality actinic EUV mask imaging with resolutions as low as 100-nm half-pitch, (20-nm, 5x wafer equivalent size), and an assessment of the imaging performance based on several metrics. Contrast transfer function (CTF) measurements show high contrast imaging for features sizes close to the diffraction-limit. An investigation of the illumination coherence shows that AIT imaging is much more coherent than previously anticipated, with a below 0.2. Flare measurements with several line-widths show a flare contribution on the order of 2-3% relative intensity in dark regions above the 1.3% absorber reflectivity on the test mask used for these experiments. Astigmatism coupled with focal plane tilt are the dominant aberrations we have observed. The AIT routinely records 250-350 high-quality images in numerous through-focus series per 8-hour shift. Typical exposure times range from 0.5 seconds during alignment, to approximately 20 seconds for high-resolution images.
C1 [Goldberg, Kenneth A.; Naulleau, Patrick P.; Rekawa, Senajith B.; Kemp, Charles D.; Gunion, Robert F.; Salmassi, Farhad; Gullikson, Eric M.; Anderson, Erik H.; Han, Hak-Seung] Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr X Ray Opt, Berkeley, CA 94720 USA.
RP Goldberg, KA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr X Ray Opt, Berkeley, CA 94720 USA.
NR 8
TC 17
Z9 17
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6887-1
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6730
BP E7305
EP E7305
DI 10.1117/12.746756
PN 1-3
PG 12
WC Engineering, Electrical & Electronic; Materials Science, Coatings &
   Films; Optics
SC Engineering; Materials Science; Optics
GA BHJ06
UT WOS:000253477000173
ER

PT S
AU Peters, DW
   Basilio, LI
   Loui, H
AF Peters, D. W.
   Basilio, L. I.
   Loui, H.
BE Adibi, A
   Lin, SY
   Scherer, A
TI Plasmonic antireflection surfaces for the mid-infrared - art. no. 64800A
SO Photonic Crystal Materials and Devices VI
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Photonic Crystal Materials and Devices VI
CY JAN 22-25, 2007
CL San Jose, CA
SP SPIE
DE plasmonics; infrared; antireflection; frequency selective surface;
   modeling
AB In a similar manner to the frequency selective surfaces commonly used in the microwave regime, we have designed antireflective surfaces in the mid-infrared (2-5 mu m). Translation of microwave designs to the infrared is not trivial for several reasons. Properties of applicable IR materials are significantly different than their microwave counterparts. Additionally, the required feature sizes need a completely different fabrication methodology. Our Surfaces are metallic, yet have a high-transmission angular and frequency passband. We take advantage of photon-plasmon interaction to maximize transmission through holes in the metal surface. Simulations have been completed using both rigorous coupled wave analysis and method of moments codes. The design process has followed a path that insures that we are able to fabricate the designed structures considering cases of normal and off-angle incidence. We designed our surfaces to be compatible with shapes that we will etch in silicon and then coat in gold: this process allows the greatest flexibility in etching shapes for vias while maintaining a metallic layer for plasmon propagation on the surface. We anticipate over 90% transmission in the infrared passband. Our design methodology would also be applicable to the 8-12 mu m band.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Peters, DW (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 10
TC 2
Z9 2
U1 0
U2 5
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6593-1
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6480
BP A4800
EP A4800
AR 64800A
DI 10.1117/12.701333
PG 9
WC Crystallography; Optics
SC Crystallography; Optics
GA BGE96
UT WOS:000246368900002
ER

PT S
AU Poghosyan, AR
   Li, XN
   Manukyan, AL
   Grigoryan, SG
   Vardanyan, ES
AF Poghosyan, Armen R.
   Li, XiaoNan
   Manukyan, Alexandr L.
   Grigoryan, Stepan G.
   Vardanyan, Eduard S.
BE Guo, R
   Yin, SS
   Yu, FTS
TI Sol-gel method of p-type zinc oxide films preparation - art. no. 66981D
SO PHOTONIC FIBER AND CRYSTAL DEVICES: ADVANCES IN MATERIALS AND
   INNOVATIONS IN DEVICE APPLICATIONS
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Photonic Fiber and Crystal Devices
CY AUG 26-27, 2007
CL San Diego, CA
SP SPIE
DE transparent conductive oxide; zinc oxide thin film; sol-gel
ID ZNO THIN-FILMS; CODOPING METHOD; ALLOY-FILMS; FABRICATION; DEPOSITION
AB Both n-type and p-type ZnO will be required for development of homojunction light-emitting diodes and laser diodes. It is easy to obtain strong n-type ZnO, but very difficult to create consistent, reliable, high-conductivity p-type material. Here we present our investigations of p-type ZnO thin film preparation by sol-gel method using single Li doping and Ga(Al)+N codoping technique. ZnO thin films with c-axis orientation have been prepared on glass substrates. Zn acetate dihydrate, gallium nitrate and acetamide were used as zinc, gallium and nitrogen precursors respectively. SEM, X-ray diffraction, electric conductivity and Hall effect measurements were carried out. The results show that p-type conducting ZnO films with hole concentrations as high as 5x10(17) cm(-3) were obtained by this method.
C1 [Poghosyan, Armen R.; Manukyan, Alexandr L.; Grigoryan, Stepan G.; Vardanyan, Eduard S.] Armenian Acad Sci, Inst Phys Res, Ashtarak 378410 2, Armenia.
   [Li, XiaoNan] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Poghosyan, AR (reprint author), Armenian Acad Sci, Inst Phys Res, Ashtarak 378410 2, Armenia.
NR 14
TC 3
Z9 3
U1 0
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6846-8
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6698
BP D6981
EP D6981
DI 10.1117/12.734442
PG 4
WC Engineering, Electrical & Electronic; Materials Science,
   Multidisciplinary; Optics
SC Engineering; Materials Science; Optics
GA BGY49
UT WOS:000251356500028
ER

PT S
AU Cruz-Cabrera, AA
   Kemme, SA
   Wendt, JR
   Boye, RR
   Carter, TR
   Samora, S
AF Cruz-Cabrera, A. A.
   Kemme, S. A.
   Wendt, J. R.
   Boye, R. R.
   Carter, T. R.
   Samora, S.
BE Earman, AM
   Chen, RT
TI Polarimetric imaging cross talk effects from glue separation between FPA
   and micropolarizer arrays at the MWIR - art. no. 64780Q
SO Photonics Packaging, Integration, and Interconnects VII
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
   (SPIE)
LA English
DT Proceedings Paper
CT Conference on Photonics Packaging, Integration, and Interconnects VII
CY JAN 23-25, 2007
CL San Jose, CA
SP SPIE
DE polarimetry; MWIR; diffraction
ID WIRE GRID POLARIZERS; FABRICATION; ELEMENT
AB We have numerically and experimentally determined the effect of crosstalk from adjacent gold wiregrid micropolarizer pixels in a midwave infrared (MWIR) focal plane array (FPA). Fabrication of a snapshot polarization-imaging device involves gluing a micropolarizer array substrate on top of an FPA. We evaluated several arrays of super-cells of four pixelated polarizers by modeling the near fields behind the devices. Each polarizer in the super-cell is oriented to allow solving three Stokes parameters by themselves or four Stokes parameters in conjunction with a birefringent waveplate. In addition, we fabricated sets of super-cells for determining optimum polarizer-FPA separation. Modeling and empirical data indicate cross talk between the adjacent pixels at several microns after crossing the polarizer plane. Cross talk between adjacent pixels increases uncertainty in the measured polarization states of a scene of interest. Data shows that the extinction ratio will decrease by 17% when moving the FPA from 0.5 mu m to 1.0 mu m away from the polarizer. These changes in extinction ratio are important given that typical glue separation is approximately 10 mu m.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Cruz-Cabrera, AA (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 12
TC 4
Z9 4
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-6591-7
J9 P SOC PHOTO-OPT INS
PY 2007
VL 6478
BP Q4780
EP Q4780
AR 64780Q
DI 10.1117/12.702084
PG 13
WC Optics
SC Optics
GA BGF05
UT WOS:000246390700027
ER

PT J
AU Feng, HQ
   Li, HY
   Zhou, GM
   Liang, HG
   Duan, JG
   Zhi, DJ
   Li, X
   Ma, J
AF Feng, H. Q.
   Li, H. Y.
   Zhou, G. M.
   Liang, H. G.
   Duan, J. G.
   Zhi, D. J.
   Li, X.
   Ma, J.
TI Influence of irradiation on cyanide-resistant respiration and AOX1
   multi-gene family expression during greening of etiolated rice seedlings
SO PHOTOSYNTHETICA
LA English
DT Article
DE chlorophyll; chloroplast; CO2 fixation; inhibitors; Oryza; oxygen
   uptake; salicylhydroxamic acid
ID PHOTOSYNTHETIC CARBON ASSIMILATION; MITOCHONDRIAL OXIDATIVE-METABOLISM;
   TOBACCO-MOSAIC-VIRUS; ALTERNATIVE OXIDASE; SALICYLIC-ACID; DIFFERENTIAL
   EXPRESSION; SALICYLHYDROXAMIC ACID; ARABIDOPSIS-THALIANA;
   ELECTRON-TRANSPORT; SOYBEAN COTYLEDONS
AB We investigated the differential expression of AOXI multi-gene family and the regulation of alternative respiratory pathway during initial greening development in leaves of rice (Oryza sativa L.) seedlings. After exposing the dark-grown rice seedlings to continuous irradiation, total respiration (V-t), capacity of alternative pathway (V-alt), and their ratio (V-alt/V-t) increased with the greening of leaves. In this process, AOX1c transcript increased under constant irradiation, while AOX1a and AOX1b transcripts were hardly detected. Thus AOX1c in rice presents a similar expression pattern as AOX2 does in many dicotyledonous species during greening development. Compared with the rapid increase of cyanide-resistant respiration in the presence of photon energy, CO2 fixation was not observed until 8 h after the onset of irradiation. The AOX inhibitor salicylhydroxamic acid (SHAM; 1 mM) inhibited 67.3 % of cyanide-in sensitive oxygen uptake in dark-grown leaves and 69.4 % of it in leaves grown under irradiation. Dark-grown plants pre-treated with SHAM were then irradiated for 12 h. SHAM did not obviously modify photosynthetic CO2 fixation rate on a chlorophyll (Chi) content basis in both leaves and simultaneously isolated chloroplasts. Hence during initial greening steps of the plants, the induction of alternative pathway and AOX1 expression by irradiation is not directly linked with carbon assimilation of photosynthesis. The application of SHAM partially limited Chi production in rapidly greening leaves, indicating that Chi synthesis in the process of greening might be medicated to some extent by alternative respiratory pathway.
C1 Lanzhou Univ, Sch Life Sci, Dept Biochem & Mol Biol, Lanzhou 730000, Peoples R China.
   Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
RP Li, HY (reprint author), Lanzhou Univ, Sch Life Sci, Dept Biochem & Mol Biol, 298 Tian Shui Rd, Lanzhou 730000, Peoples R China.
EM lihy@lzu.edu.cn
NR 44
TC 6
Z9 7
U1 0
U2 6
PU ACAD SCI CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
PI PRAGUE 6
PA NA KARLOVCE 1A, PRAGUE 6 CZ-160 00, CZECH REPUBLIC
SN 0300-3604
J9 PHOTOSYNTHETICA
JI Photosynthetica
PY 2007
VL 45
IS 2
BP 272
EP 279
DI 10.1007/s11099-007-0044-y
PG 8
WC Plant Sciences
SC Plant Sciences
GA 177ZD
UT WOS:000247190100017
ER

PT J
AU Woodard, R
   Newman, DE
   Sanchez, R
   Carreras, BA
AF Woodard, Ryan
   Newman, David E.
   Sanchez, Raul
   Carreras, Benjamin A.
TI Persistent dynamic correlations in self-organized critical systems away
   from their critical point
SO PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
LA English
DT Article
DE self-organized criticality; running sandpile; correlations; hurst;
   pulses
ID PLASMA TURBULENCE; PHASE-TRANSITIONS; 1/F NOISE; AVALANCHES; SANDPILES;
   MODEL
AB We show that correlated dynamics and long time memory persist in self-organized criticality (SOC) systems even when forced away from the defined critical point that exists at vanishing drive strength. These temporal correlations are found for all levels of external forcing as long as the system is not overdriven. They arise from the same physical mechanism that produces the temporal correlations found at the vanishing drive limit, namely the memory of past events stored in the system profile. The existence of these correlations contradicts the notion that a SOC time series is simply a random superposition of events with sizes distributed as a power law, as has been suggested by previous studies. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Alaska Fairbanks, Fairbanks, AK 99775 USA.
   Univ Carlos III Madrid, Madrid 28911, Spain.
   Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Woodard, R (reprint author), British Antarctic Survey, Madingley Rd, Cambridge CB3 0ET, England.
EM rywo@bas.ac.uk
RI Sanchez, Raul/C-2328-2008
NR 32
TC 13
Z9 13
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-4371
J9 PHYSICA A
JI Physica A
PD JAN 1
PY 2007
VL 373
BP 215
EP 230
DI 10.1016/j.physa.2006.05.001
PG 16
WC Physics, Multidisciplinary
SC Physics
GA 109NU
UT WOS:000242316000018
ER

PT J
AU Blattner, M
   Zhang, YC
   Maslov, S
AF Blattner, Marcel
   Zhang, Yi-Cheng
   Maslov, Sergei
TI Exploring an opinion network for taste prediction: An empirical study
SO PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
LA English
DT Article
DE opinion network; recommender systems; taste prediction
AB We develop a simple statistical method to find affinity relations in a large opinion network which is represented by a very sparse matrix. These relations allow us to predict missing matrix elements. We test our method on the Eachmovie data of thousands of movies and viewers. We found that significant prediction precision can be achieved and it is rather stable. There is an intrinsic limit to further improve the prediction precision by collecting more data, implying perfect prediction can never obtain via statistical means. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Fribourg, Dept Phys, CH-1700 Fribourg, Switzerland.
   Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Blattner, M (reprint author), Univ Fribourg, Dept Phys, Chemin Muse 3, CH-1700 Fribourg, Switzerland.
EM marcel.blattner@unifr.ch
RI Maslov, Sergei/C-2397-2009
OI Maslov, Sergei/0000-0002-3701-492X
NR 7
TC 15
Z9 16
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-4371
J9 PHYSICA A
JI Physica A
PD JAN 1
PY 2007
VL 373
BP 753
EP 758
DI 10.1016/j.physa.2006.04.121
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 109NU
UT WOS:000242316000065
ER

PT J
AU Xie, HF
   Yan, KK
   Maslov, S
AF Xie, Huafeng
   Yan, Koon-Kiu
   Maslov, Sergei
TI Optimal ranking in networks with community structure
SO PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
LA English
DT Article
DE WWW; ranking; PageRank; community structure; networks
AB The World-Wide Web (WWW) is characterized by a strong community structure in which groups of webpages (e.g. those devoted to a common topic or belonging to the same organization) are densely interconnected by hyperlinks. We study how such network architecture affects the average Google rank of individual communities. Using a mean-field approximation, we quantify how the average Google rank of community webpages depend on the degree to which it is isolated from the rest of the world in both incoming and outgoing directions, and alpha the only intrinsic parameter of Google's PageRank algorithm. Based on this expression we introduce a concept of a web-community being decoupled or conversely coupled to the rest of the network. We proceed with empirical study of several internal web-communities within two US universities. The predictions of our mean-field treatment were qualitatively verified in those real-life networks. Furthermore, the value alpha = 0.15 used by Google seems to be optimized for the degree of isolation of communities as they exist in the actual WWW. (c) 2006 Elsevier B.V. All rights reserved.
C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
   SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
   CUNY, New Media Lab, Grad Ctr, New York, NY 10016 USA.
RP Maslov, S (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
EM maslov@bnl.gov
RI Yan, Koon-Kiu/A-5940-2009; Maslov, Sergei/C-2397-2009
OI Maslov, Sergei/0000-0002-3701-492X
NR 6
TC 3
Z9 3
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-4371
J9 PHYSICA A
JI Physica A
PD JAN 1
PY 2007
VL 373
BP 831
EP 836
DI 10.1016/j.physa.2006.04.123
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 109NU
UT WOS:000242316000073
ER

PT J
AU Li, GH
   Su, FH
   Wang, WJ
   Ding, K
   Chen, W
   Liu, YF
   Joly, AG
AF Li, G. H.
   Su, F. H.
   Wang, W. J.
   Ding, K.
   Chen, W.
   Liu, Y. F.
   Joly, A. G.
TI Pressure behaviour of the UV and green emission bands in ZnO micro-rods
SO PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
LA English
DT Article; Proceedings Paper
CT 12th International Conference on High Pressure Semiconductor Physics
   (HPSP-12)
CY JUL 31-AUG 03, 2006
CL Barcelona, SPAIN
ID OPTICAL-PROPERTIES; ZINC-OXIDE; PHOTOLUMINESCENCE; NANOWIRES; GROWTH
AB The pressure behavior of the ultraviolet (UV) and green emission bands in ZnO tetrapod-like micro-rods has been investigated at 300 and 70 K, respectively. The pressure coefficient of the UV band at 300 K is 24.5 meV/GPa, consistent with that of the band gap of bulk ZnO. However, the pressure coefficient of the green band is 25 meV/GPa, far larger than previous literature reports. The green band in this work originates from Cu-related emission, as confirmed by the fine structure observed in the spectra at 10 K. The pressure coefficients of four phonon replicas of the free exciton emission (FX) at 70 K are 21.0, 20.2, 19.8, and 19.3 meV/GPa, respectively. The energy shift rate of the FX emission and the LO phonon energies is then determined to be 21.4 and 0.55 meV/GPa. The pressure coefficient of the neutral donor bound exciton ((DX)-X-0) transition is 20.5 meV/GPa, only 4% smaller than that of FX. This confirms that the (DX)-X-0 emission corresponds to excitons bound to neutral shallow donors. (C) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China.
   Univ Texas, Dept Phys, Arlington, TX 76019 USA.
   Nomad Inc, Stillwater, OK 74074 USA.
   Pacific NW Natl Lab, Richland, WA 99354 USA.
RP Li, GH (reprint author), Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, POB 912, Beijing 100083, Peoples R China.
EM ghli@red.semi.ac.cn; weichen@uta.edu
NR 15
TC 2
Z9 2
U1 0
U2 3
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 0370-1972
J9 PHYS STATUS SOLIDI B
JI Phys. Status Solidi B-Basic Solid State Phys.
PD JAN
PY 2007
VL 244
IS 1
BP 87
EP 92
DI 10.1002/pssb.200672545
PG 6
WC Physics, Condensed Matter
SC Physics
GA 128XS
UT WOS:000243693600016
ER

PT J
AU Choi, IH
   Yu, PY
   Tangney, P
   Louie, SG
AF Choi, In-Hwan
   Yu, Peter Y.
   Tangney, Paul
   Louie, Steven G.
TI Vibrational properties of single walled carbon nanotubes under pressure
   from Raman scattering experiments and molecular dynamics simulations
SO PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
LA English
DT Article; Proceedings Paper
CT 12th International Conference on High Pressure Semiconductor Physics
   (HPSP-12)
CY JUL 31-AUG 03, 2006
CL Barcelona, SPAIN
ID HYDROSTATIC-PRESSURE
AB We have investigated theoretically and experimentally the pressure dependent structural and vibrational properties of single-walled carbon nanotubes (SWNT). Bundles of SWNTs are studied inside a diamond anvil high pressure cell with micro-Raman scattering. The tube diameter and size distribution are determined from the radial breathing modes (RBM) of the tubes. The pressure coefficient and linewidth of one of the high frequency C-C bond stretching modes was found to change suddenly at similar to 3 GPa which is well below the structural transformation pressure (P-c) for the tubes in our sample. Molecular dynamics simulations were used to calculate the vibrational density of states of SWNTs as a function of pressure. Our simulations suggest that the experimental results can be explained by a softening of a low-frequency optical mode of the SWNTs - the "squashing" mode - and the dynamical effect of this softening on other phonon modes. (C) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   Chung Ang Univ, Dept Phys, Seoul 156756, South Korea.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA.
RP Yu, PY (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM pyyu@berkeley.edu
RI Tangney, Paul/D-1623-2010
NR 12
TC 6
Z9 6
U1 0
U2 5
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0370-1972
J9 PHYS STATUS SOLIDI B
JI Phys. Status Solidi B-Basic Solid State Phys.
PD JAN
PY 2007
VL 244
IS 1
BP 121
EP 126
DI 10.1002/pssb.200672576
PG 6
WC Physics, Condensed Matter
SC Physics
GA 128XS
UT WOS:000243693600022
ER

PT J
AU Kumar, RS
   Cornelius, AL
   Somayazulu, M
   Errandonea, D
   Nicol, MF
   Gardner, J
AF Kumar, Ravhi S.
   Cornelius, Andrew L.
   Somayazulu, Maddury
   Errandonea, Daniel
   Nicol, Malcolm F.
   Gardner, Jason
TI High pressure structure of Tb2Ti2O7 pyrochlore at cryogenic temperatures
SO PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
LA English
DT Article; Proceedings Paper
CT 12th International Conference on High Pressure Semiconductor Physics
   (HPSP-12)
CY JUL 31-AUG 03, 2006
CL Barcelona, SPAIN
ID SINGLE-CRYSTAL; SPIN LIQUID; FRUSTRATION
AB The structure of Tb2Ti2O7 pyrochlore was investigated at high pressures up to 24 GPa at cryogenic temperatures down to 6.5 K using angular dispersive X-ray diffraction with synchrotron radiation at HPCAT, Advanced Photon Source. The cell parameters were obtained by performing full profile Rietveld refinements of the diffraction data. The equation of state is obtained at low temperatures by fitting the pressure-volume data to a second order Birch Murnaghan eqation and a bulk modulus value of 168(4) GPa is obtained. The results show persistance of the pyrochlore structure up to the maximum pressure studied in the experiment and further indicate that pressure induces solely magnetic ordering which do not involve crystal symmetry changes.
C1 Univ Nevada, HiPSEC, Las Vegas, NV 89154 USA.
   Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA.
   Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA.
   Univ Valencia, Dept Fis Aplicada, ICMUV, E-46100 Valencia, Spain.
   NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
   Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Kumar, RS (reprint author), Univ Nevada, HiPSEC, Las Vegas, NV 89154 USA.
EM ravhi@physics.unlv.edu
RI Cornelius, Andrew/A-9837-2008; Kumar, Ravhi/B-8427-2012; Errandonea,
   Daniel/J-7695-2016; 
OI Errandonea, Daniel/0000-0003-0189-4221; Kumar, Ravhi/0000-0002-1967-1619
NR 19
TC 4
Z9 4
U1 1
U2 8
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0370-1972
J9 PHYS STATUS SOLIDI B
JI Phys. Status Solidi B-Basic Solid State Phys.
PD JAN
PY 2007
VL 244
IS 1
BP 266
EP 269
DI 10.1002/pssb.200672558
PG 4
WC Physics, Condensed Matter
SC Physics
GA 128XS
UT WOS:000243693600047
ER

PT J
AU Jackson, MP
   Halsall, MP
   Gungerich, M
   Klar, PJ
   Heimbrodt, W
   Geisz, JF
AF Jackson, M. P.
   Halsall, M. P.
   Guengerich, M.
   Klar, P. J.
   Heimbrodt, W.
   Geisz, J. F.
TI Vibrational properties of GaP and GaP1-xNx under hydrostatic pressures
   up to 30 GPa
SO PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
LA English
DT Article; Proceedings Paper
CT 12th International Conference on High Pressure Semiconductor Physics
   (HPSP-12)
CY JUL 31-AUG 03, 2006
CL Barcelona, SPAIN
ID RAMAN-SCATTERING; III-V; GALLIUM-PHOSPHIDE; SPECTROSCOPY;
   SEMICONDUCTORS; PHASES; GAAS
AB We report on Raman scattering of the vibrational modes of GaP and the dilute nitride ternary GaP0.979N0.021 under hydrostatic pressures of up to 30 GPa. We measured the pressure induced shift of the TO and LO modes of GaP up to the phase transition (I-II) and determined mode Gruneisen parameters of 1.12 and 0.98. The phase transition was observed near to 24.5 GPa. We have also studied the dependence of the vibrational spectrum of the GaP0.979N0.021 up to 20 GPa. The zincblende optical phonons of the ternary alloy show great similarities to those of binary GaP, with no significant changes to the Gruneisen parameters or the phase transition. The pressure-induced shift of local nitrogen mode frequency in GaP0.979N0.021 was studied up to 10 GPa and found to be considerably larger than that of the phonon modes in GaN, indicating that the local mode does not show a GaN-like behaviour under pressure.
C1 Univ Manchester, Dept Elect & Elect Engn, Manchester M60 1QD, Lancs, England.
   Univ Marburg, Dept Phys, D-35032 Marburg, Germany.
   Univ Marburg, Ctr Mat Sci, D-35032 Marburg, Germany.
   Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Jackson, MP (reprint author), Univ Manchester, Dept Elect & Elect Engn, Manchester M60 1QD, Lancs, England.
EM m.jackson@postgrad.manchester.ac.uk
OI Halsall, Matthew/0000-0001-7441-4247
NR 18
TC 3
Z9 3
U1 2
U2 9
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0370-1972
J9 PHYS STATUS SOLIDI B
JI Phys. Status Solidi B-Basic Solid State Phys.
PD JAN
PY 2007
VL 244
IS 1
BP 336
EP 341
DI 10.1002/pssb.200672516
PG 6
WC Physics, Condensed Matter
SC Physics
GA 128XS
UT WOS:000243693600060
ER

PT S
AU Urban-Klaehn, JM
   Spaulding, R
   Hunt, AW
   Peterson, ES
AF Urban-Klaehn, J. M.
   Spaulding, R.
   Hunt, A. W.
   Peterson, E. S.
BE Knights, AP
   Mascher, P
   Simpson, PJ
TI Applicability of the MCNPX particle transport code for determination of
   the source correction effect in positron lifetime measurements on thin
   polymer films
SO PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4,
   NO 10
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT 14th International Conference on Positron Annihilation (ICPA 14)
CY JUL 23-28, 2006
CL McMaster Univ, Hamilton, CANADA
SP Ctr Emerging Device Technologies, McMaster Univ, McMaster Univ, Fac Engn, FUJI IMVAC, Canberra Canada, Newport Canada, Johnsen Ultravac, Gamble Technologies Ltd
HO McMaster Univ
ID ANNIHILATION
AB The method presented herein uses the MCNPX Monte Carlo particle transport code to track individual positrons and other particles through geometry that accounts for the detectors, backing foils, samples and sources with their actual sizes, positions and material characteristics. Polymer material, polydimethylsiloxane (PDMS), with different thickness of films served as samples. The excellent agreement between the experimental results and the MCNPX simulation of source correction effects for varied positron sources and different film thicknesses validates the applicability of the MCNPX code. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 [Urban-Klaehn, J. M.] Positron Syst Inc, 1500 Alvin Ricken Dr, Pocatello, ID 83201 USA.
   [Spaulding, R.; Hunt, A. W.] Idaho Accelerator Ctr, Pocatello, ID 83201 USA.
   [Peterson, E. S.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Urban-Klaehn, JM (reprint author), Positron Syst Inc, 1500 Alvin Ricken Dr, Pocatello, ID 83201 USA.
EM klaehn@athena.physics.isu.edu
NR 4
TC 0
Z9 0
U1 0
U2 0
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2007
VL 4
IS 10
BP 3731
EP +
DI 10.1002/pssc.200675819
PG 2
WC Physics, Atomic, Molecular & Chemical
SC Physics
GA BGU81
UT WOS:000250716700069
ER

PT S
AU Zhang, R
   Johnson, PM
   Deluca, RJ
   Alger, TD
   Xu, J
   Suzuki, R
   Ohdaira, T
   Jean, YC
AF Zhang, Renwu
   Johnson, Paul M.
   Deluca, Ryan J.
   Alger, Terry D.
   Xu, Jun
   Suzuki, R.
   Ohdaira, T.
   Jean, Y. C.
BE Knights, AP
   Mascher, P
   Simpson, PJ
TI Studying conductive polymer coating (BAM-PPV) using positron
   annihilation spectroscopy
SO Physica Status Solidi C - Current Topics in Solid State Physics, Vol 4,
   No 10
SE PHYSICA STATUS SOLIDI C-CURRENT TOPICS IN SOLID STATE PHYSICS
LA English
DT Proceedings Paper
CT 14th International Conference on Positron Annihilation (ICPA 14)
CY JUL 23-28, 2006
CL McMaster Univ, Hamilton, CANADA
SP Ctr Emerging Device Technologies, McMaster Univ, McMaster Univ, Fac Engn, FUJI IMVAC, Canberra Canada, Newport Canada, Johnsen Ultravac, Gamble Technologies Ltd
HO McMaster Univ
AB Positron annihilation spectroscopy has been used to study two conductive polymer coatings, Al-507A and Al-507B, consisting of BAM-PPV (poly (bis-dialkylamino) phenylene vinylene) dissolved in two different solvents, THF at 0.2% concentration and xylene at 1.0% concentration, respectively. These samples were sprayed on aluminum substrates. They were further subjected to neutral salt treatment for 240 hours for the corrosion test. Doppler broadening of annihilation radiation (DBAR) and positron annihilation lifetime spectroscopy (PALS) were employed to investigate the corrosion effect on the two coatings in addition to their free volume. It was found that there are two layers in the polymer topcoat of sample Al-507A while they were not clearly seen in Al-507B. Interestingly the near-surface layer demonstrates a large change after the salt treatment, suggesting creation of extra free volume. Both DBAR and PALS measurements indicate that the amount of free volume for Al-507B coating is more than that for Al-507A coating, while the free-volume hole size for both coatings are similar, around 0.32 nm. (C) 2007 WILEYNCH Verlag GmbH & Co. KGaA, Weinheim
C1 So Utah Univ, Dept Phys Sci, Cedar City, UT 84720 USA.
   Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
   Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan.
   Univ Missouri, Dept Chem, Kansas City, MO 64110 USA.
RP Zhang, R (reprint author), So Utah Univ, Dept Phys Sci, Cedar City, UT 84720 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1610-1634
J9 PHYS STATUS SOLIDI C
PY 2007
VL 4
IS 10
BP 3789
EP 3792
DI 10.1002/pssc.200675855
PG 4
WC Physics, Atomic, Molecular & Chemical
SC Physics
GA BGU81
UT WOS:000250716700083
ER

PT S
AU Chemerisov, S
   Jonah, CD
   Jean, YC
   Chen, HM
   Schrader, D
   Hunt, AW
AF Chemerisov, Sergey
   Jonah, Charles D.
   Jean, Y. C.
   Chen, Hongmin
   Schrader, David
   Hunt, Alan W.
BE Knights, AP
   Mascher, P
   Simpson, PJ
TI First positron flux measurements at the Argonne Positron Source (APosS)
SO PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4,
   NO 10
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT 14th International Conference on Positron Annihilation (ICPA 14)
CY JUL 23-28, 2006
CL McMaster Univ, Hamilton, CANADA
SP Ctr Emerging Device Technologies, McMaster Univ, McMaster Univ, Fac Engn, FUJI IMVAC, Canberra Canada, Newport Canada, Johnsen Ultravac, Gamble Technologies Ltd
HO McMaster Univ
ID MODERATOR
AB The development of the APosS at the Argonne low-energy linac is discussed. We measured the yields and outline strategies to increase the number of slow positrons. We describe the measurement of the yield of slow positrons as a function of electron-beam energy and compare these results with theoretical calculations. (C) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 [Chemerisov, Sergey; Jonah, Charles D.] Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA.
   [Jean, Y. C.; Chen, Hongmin] Univ Missouri Kansas City, Dept Chem, Kansas City, MO USA.
   [Schrader, David] Marquette Univ, Dept Chem, Milwaukee, WI USA.
   [Hunt, Alan W.] Idaho State Univ, Idaho Accelerator Ctr, Dept Phys, Pocatello, ID USA.
RP Chemerisov, S (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM Chemerisov@anl.gov
FU US-DOE [W-31-109-ENG-38]; NSF [CHE-0439134]; Air Force Research Labs
FX We are grateful for discussions with Palakkal Askoka-Kumar, Richard
   Howell and Ken Edwards. Work performed under the auspices of the Office
   of Science, Division of Chemical Science, US-DOE under contract number
   W-31-109-ENG-38 and NSF (CHE-0439134) and Air Force Research Labs.
NR 11
TC 2
Z9 2
U1 0
U2 1
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2007
VL 4
IS 10
BP 3957
EP +
DI 10.1002/pssc.200675811
PG 2
WC Physics, Atomic, Molecular & Chemical
SC Physics
GA BGU81
UT WOS:000250716700120
ER

PT S
AU Gomez, ME
   Campillo, G
   Ramirez, JG
   Hoffmann, A
   Guimpel, J
AF Gomez, M. E.
   Campillo, G.
   Ramirez, J. -G.
   Hoffmann, A.
   Guimpel, J.
BE Ulloa, SE
   Prieto, PP
TI Detailed magnetic and structural properties of exchange-biased
   La1-xCaxMnO3
SO PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4,
   NO 11
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT CIAM Workshop Trends on Novel Materials
CY OCT 16-20, 2006
CL Santa Marta, COLOMBIA
SP CIAM, Natl Sci Fdn, Colombian Sci Technol Agcy, Ciencia Technol, Francisco Jose de Caldas, Univ del Valle, Cali, Colombia, Excel Ctr Novel Mat
ID LA2/3CA1/3MNO3/LA1/3CA2/3MNO3 SUPERLATTICES; MAGNETOTRANSPORT
   PROPERTIES; THIN-FILMS; MULTILAYERS; SUBSTRATE
AB We measured structural, magnetic and, magneto-transport properties of heterostructures consisting of La1-xCaxMnO3 ferromagnetic (FM) layers (x = 0.33) and antiferromagnetic (AF) layers (x = 0.67). We grew FM/AF superlattices via a high-pressure sputtering technique on (001) oriented SrTiO3 substrates. We systematically varied the thickness of the ferromagnetic layers, while maintaining a fixed thickness of the antiferromagnetic layers. Alternatively, we also varied the thickness of the antiferromagnetic layers, keeping a fixed ferromagnetic layer thickness. The total superlattice thickness was kept approximately constant. XRD analysis confirms the existence of the superlattice structure by the observation of multiple satellite peaks around the (001) manganite Bragg reflections. We extracted the average lattice parameter of the superlattice and its dependence on the thicknesses of the ferro- and anti ferromagnetic layers. We conducted field cooling (FC) and zero field cooling (ZFC), magneto-thermal, and magneto-resistance measurements. The existence of an exchange bias effect at temperatures below the Neel temperature of the AF layer was revealed by magnetization loops measured after FC. We studied the dependence of magnetic parameters on the thicknesses of the ferro- and anti ferromagnetic layers. We found that the structural, magnetization, and magneto transport properties as functions of F-layer thickness are all correlated. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinbeim.
C1 [Gomez, M. E.; Campillo, G.; Ramirez, J. -G.] Univ Valle, Dept Fis, Cali 25360, Colombia.
   [Hoffmann, A.] Argonne Natl Lab, Div Sci Mat, Argonne, IL 60439 USA.
   [Guimpel, J.] Ctr Atom Bariloche, Inst Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina.
RP Gomez, ME (reprint author), Univ Valle, Dept Fis, Cali 25360, Colombia.
EM megomez@calima.univalle.edu.co
RI Hoffmann, Axel/A-8152-2009
OI Hoffmann, Axel/0000-0002-1808-2767
FU COLCIENCIAS under the Excellence Center for Novel Materials [043-2005];
   U.S. DOE-BES [DE-AC02-06CH11357]; ANPCyT [PICT2003-03-13297]
FX This work was supported by COLCIENCIAS under the Excellence Center for
   Novel Materials, Contract 043-2005. Work at Argonne National Laboratory
   was supported by U.S. DOE-BES under Contract DE-AC02-06CH11357. Work at
   Centro Atomico Bariloche was supported in part by
   ANPCyT-PICT2003-03-13297.
NR 21
TC 1
Z9 2
U1 0
U2 6
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2007
VL 4
IS 11
BP 4181
EP +
DI 10.1002/pssc.200675906
PG 2
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA BHE34
UT WOS:000252428100021
ER

PT S
AU Rose, V
   Bruggemann, K
   David, R
   Franchy, R
AF Rose, V.
   Brueggemann, K.
   David, R.
   Franchy, R.
BE Ulloa, SE
   Prieto, PP
TI Oxidation-induced high-Curie-temperature ferromagnetism in CoAl(100)
SO PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4,
   NO 11
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT CIAM Workshop Trends on Novel Materials
CY OCT 16-20, 2006
CL Santa Marta, COLOMBIA
SP CIAM, Natl Sci Fdn, Colombian Sci Technol Agcy, Ciencia Technol, Francisco Jose de Caldas, Univ del Valle, Cali, Colombia, Excel Ctr Novel Mat
ID MAGNETIC-PROPERTIES; FILMS; COAL; COGA; THIN; GROWTH; OXIDE
AB In conventional magnetic materials, oxidation is a disagreeable effect that often lowers or destroys the magnetic capabilities of those materials. By contrast, we report on the decisive paramagnetic-ferromagnetic phase transition in CoAl(100) at room temperature, utilizing oxidation of stoichiometric CoAl. We also discuss the control and drastic increase of the coercive field by subsequent annealing of the oxidized sample. The alumina film grown by selective oxidation protects the alloy from oxidation of Co, despite the accumulation of Al vacancies and the resulting enrichment in Co of the metallic phase underneath the oxide film. As a result, a ferromagnetic thin Co-rich phase is formed at the interface between the insulating aluminum oxide and the paramagnetic Co50Al50 bulk. The creation via simple oxidation of a ferromagnetic thin film underneath a surface insulator demonstrates a novel path to building the majority of a magnetic tunnel junction. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 [Rose, V.] Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA.
   [David, R.; Franchy, R.] Res Ctr Julich, Inst Surfaces & Interfaces ISG 3, D-52425 Julich, Germany.
RP Rose, V (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM vrose@anl.gov
RI Rose, Volker/B-1103-2008
OI Rose, Volker/0000-0002-9027-1052
NR 26
TC 2
Z9 2
U1 0
U2 1
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2007
VL 4
IS 11
BP 4188
EP +
DI 10.1002/pssc.200675907
PG 2
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA BHE34
UT WOS:000252428100022
ER

PT S
AU Hoffmann, A
AF Hoffmann, Axel
BE Ulloa, SE
   Prieto, PP
TI Pure spin-currents
SO PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4,
   NO 11
SE PHYSICA STATUS SOLIDI C-CURRENT TOPICS IN SOLID STATE PHYSICS
LA English
DT Proceedings Paper
CT CIAM Workshop Trends on Novel Materials
CY OCT 16-20, 2006
CL Santa Marta, COLOMBIA
SP CIAM, Natl Sci Fdn, Colombian Sci Technol Agcy, Ciencia Technol, Francisco Jose de Caldas, Univ del Valle, Cali, Colombia, Excel Ctr Novel Mat
ID GIANT MAGNETORESISTANCE; ROOM-TEMPERATURE; INJECTION; MAGNETIZATION;
   VALVES; ACCUMULATION; TRANSPORT; METALS
AB The new development of spintronics aims at utilizing the spin degree of freedom for electronic applications. To this date, in most investigated spintronics systems and devices the spin and charge currents are in parallel and therefore directly coupled. However, using non-local lateral devices allows to separate spin and charge currents, which allows the investigation of pure spin-currents. This article reviews the recent developments using non-local spin-dependent measurements and other approaches towards utilizing pure spin-currents.
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Hoffmann, A (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Hoffmann, Axel/A-8152-2009
OI Hoffmann, Axel/0000-0002-1808-2767
NR 38
TC 22
Z9 23
U1 2
U2 11
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1610-1634
J9 PHYS STATUS SOLIDI C
PY 2007
VL 4
IS 11
BP 4236
EP 4241
DI 10.1002/pssc.200775942
PG 6
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA BHE34
UT WOS:000252428100030
ER

PT S
AU Ozdemir, M
   Ozyuzer, L
   Kurter, C
AF Ozdemir, M.
   Ozyuzer, L.
   Kurter, C.
BE Stutzmann, M
TI Spin polarized and degenerate tunneling spectra in intrinsic Josephson
   junctions of Bi2212
SO PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4,
   NO 2
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT International Conference on Superlattices, Nano-Structures and
   Nano-Devices
CY JUL 30-AUG 04, 2006
CL Istanbul, TURKEY
ID BI2SR2CACU2O8+DELTA SINGLE-CRYSTALS; OVERDOPED BI2SR2CACU2O8+DELTA;
   SUPERCONDUCTING GAP; SPECTROSCOPY; DEPENDENCE
AB Tunneling characteristics of HgBr2 intercalated superconducting Bi2212 single crystals have been obtained by using 10x10 mu m(2) intrinsic Josephson junction stacks, so called mesa structures. The spin degenerate current is driven along the c-axis with Au layer using point contact tunneling assembly at 4.2 K. The spin polarized current is also driven along the c-axis of crystals with Au/Co/Au multilayer. In order to understand the role of ferromagnetic layer (Co), quasiparticle branches are examined with and without magnetic field. The magnetic field evolution of switching currents are obtained for gaining further insight about the spin injection through the stack. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinbeim.
C1 [Ozdemir, M.; Ozyuzer, L.] Izmir Inst Technol, Dept Phys, TR-35430 Izmir, Turkey.
   [Kurter, C.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Ozyuzer, L (reprint author), Izmir Inst Technol, Dept Phys, TR-35430 Izmir, Turkey.
EM ozyuzer@iyte.edu.tr
RI Ozyuzer, Lutfi/H-3142-2011
FU TUBITAK (Scientific and Technical Research Council of Turkey)
   [TBAG-2031]; Turkish Academy of Sciences, in the framework of the Young
   Scientist Award Program [LO/TUBA-GEBIP/2002-1-17]
FX The authors acknowledge discussion with K. E. Gray, J. F. Zasadzinski
   and D. G. Hinks. This work is partially supported by TUBITAK (Scientific
   and Technical Research Council of Turkey) project number TBAG-2031. L.
   O. acknowledges support from Turkish Academy of Sciences, in the
   framework of the Young Scientist Award Program (LO/TUBA-GEBIP/2002-1-17)
NR 12
TC 3
Z9 3
U1 0
U2 0
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2007
VL 4
IS 2
BP 563
EP +
DI 10.1002/pssc.200673312
PG 3
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
   Physics, Condensed Matter
SC Science & Technology - Other Topics; Materials Science; Physics
GA BGB09
UT WOS:000245877200098
ER

PT S
AU Smith, DY
   Black, CE
   Homes, CC
   Shiles, E
AF Smith, D. Y.
   Black, C. E.
   Homes, C. C.
   Shiles, E.
BE Stutzmann, M
TI Optical properties of TiO2-SiO2 glass over a wide spectral range
SO PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4,
   NO 3
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT 10th Europhysical Conference on Defects in Insulating Materials
CY JUL 10-14, 2006
CL Milan, ITALY
ID RAY-ABSORPTION-SPECTROSCOPY; VITREOUS SILICA; INFRARED-SPECTRUM;
   AMORPHOUS SIO2; TITANIUM; DISPERSION; EXPANSION; PHONONS
AB Optical properties of vitreous SiO2 with 7.4 wt.% TiO2 are found by dispersion analysis of reflectivity measured in the infrared, visible, and ultraviolet augmented with literature values of vacuum-ultraviolet reflectivity and absorption. The principal infrared absorption associated with the titanium dopant occurs at 950 cm(-1) in a deep minimum of the host silica absorption. We attribute this to a perturbation of the silica's absorption at 1076 cm(-1) involving oxygen atoms bridging SiO4 and TiO4 tetrahedra. Strong ultraviolet absorptions of Ti4+ occur just below the silica exciton peak between 5.5 and 7.8 eV. We attribute these to charge-transfer transitions at TiO4 tetrahedra; i.e., bound excitons consisting of a Ti3+ ion and a hole shared by four oxygen neighbours. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 [Smith, D. Y.; Black, C. E.; Shiles, E.] Univ Vermont, Dept Phys, 82 Univ Pl, Burlington, VT 05405 USA.
   [Smith, D. Y.; Shiles, E.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   [Homes, C. C.] Condensed Matter Phys & Mat Sci Dept, Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Smith, DY (reprint author), Univ Vermont, Dept Phys, 82 Univ Pl, Burlington, VT 05405 USA.
EM dysmith@uvm.edu
FU US Department of Energy, Office of Science, Materials Science Division
   [DE-FG02-02ER45964, DE-AC02-98CH10886]; Office of Nuclear Physics
   [W-31-109-Eng-38]
FX This study was supported by the US Department of Energy, Office of
   Science, Materials Science Division, under contracts DE-FG02-02ER45964 &
   DE-AC02-98CH10886, and Office of Nuclear Physics,under contract
   W-31-109-Eng-38. We are indebted to Prof. S. Jacobs of the Institute of
   Optics at the University of Rochester for providing the ULE glass
   samples.
NR 36
TC 15
Z9 15
U1 0
U2 6
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2007
VL 4
IS 3
BP 838
EP +
DI 10.1002/pssc.200673842
PG 2
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA BGD08
UT WOS:000246104300032
ER

PT S
AU Kibar, R
   Nunn, PJT
   Townsend, PD
   Wang, Y
   Boatner, LA
AF Kibar, R.
   Nunn, P. J. T.
   Townsend, P. D.
   Wang, Y.
   Boatner, L. A.
BE Stutzmann, M
TI Cathodoluminescence from mixed KTaO3-KNbO3 crystals
SO PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4,
   NO 3
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT 10th Europhysical Conference on Defects in Insulating Materials
CY JUL 10-14, 2006
CL Milan, ITALY
ID PHASE-TRANSITIONS; RELAXATION PROCESSES; SOLID-SOLUTIONS; LUMINESCENCE;
   GROWTH; KTN; THERMOLUMINESCENCE; IMPURITIES; NIOBATE; FIELD
AB Cathodoluminescence spectra are shown for a sequence of mixed crystals of KTaO3:KNbO3. The luminescence emission bands are broadly similar across the spectrum from 250 to 850 nm, although their relative strengths are sensitive to composition and temperature. A UV band near 330 nm is only well resolved in some compositions and a broad line near 700 nm may arise from Cr ions. The presence of low temperature phase transitions within the crystals is evidenced by intensity steps and spectral changes of the cathodoluminescence. Hysteresis is seen, as are domain effects and electric field shifts of the transition temperatures. The cathodoluminescence of the surface material reveals more transitions than are reported from earlier bulk studies. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 [Kibar, R.; Nunn, P. J. T.; Townsend, P. D.; Wang, Y.] Univ Sussex, Sci & Technol, Brighton BN1 9QH, E Sussex, England.
   [Kibar, R.] Ege Univ, Fac Sci, Dept Phys, TR-35100 Izmir, Turkey.
   [Wang, Y.] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China.
   [Boatner, L. A.] Oak Ridge Natl Lab, Mat Sci & Technol Div, POB 2008, Oak Ridge, TN 37831 USA.
RP Townsend, PD (reprint author), Univ Sussex, Sci & Technol, Brighton BN1 9QH, E Sussex, England.
EM p.d.townsend@sussex.ac.uk
RI Boatner, Lynn/I-6428-2013
OI Boatner, Lynn/0000-0002-0235-7594
NR 22
TC 3
Z9 3
U1 1
U2 3
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2007
VL 4
IS 3
BP 905
EP +
DI 10.1002/pssc.2006.73718
PG 2
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA BGD08
UT WOS:000246104300047
ER

PT S
AU Selling, J
   Birowosuto, MD
   Dorenbos, P
   Schweizer, S
AF Selling, J.
   Birowosuto, M. D.
   Dorenbos, P.
   Schweizer, S.
BE Stutzmann, M
TI Europium-doped barium halide X-ray scintillators
SO PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4,
   NO 3
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT 10th Europhysical Conference on Defects in Insulating Materials
CY JUL 10-14, 2006
CL Milan, ITALY
ID CRYSTAL
AB Single crystals of europium-doped barium chloride, bromide, and iodide were investigated under x-ray and gamma-ray excitation. The Eu2+-related x-ray excited luminescence is at 402, 404, and 425 nm for the chloride, bromide, and iodide, respectively. BaCl2:Eu2+ has the most promising scintillation properties of the systems investigated. The light yield is about 20,000 2,000 photons per MeV of absorbed gamma-ray energy, the energy resolution for the 662 keV photopeak is 9% 1 +/- %, and the scintillation decay time is (390 +/- 40) ns. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 [Selling, J.; Schweizer, S.] Univ Gesamthsch Paderborn, Fac Sci, Dept Phys, Warburger Str 100, D-33095 Paderborn, Germany.
   [Birowosuto, M. D.; Dorenbos, P.] Delft Univ Technol, Fac Sci Appl, Radiat Detect Matter, NL-2629 JB Delft, Netherlands.
   [Schweizer, S.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Schweizer, S (reprint author), Univ Gesamthsch Paderborn, Fac Sci, Dept Phys, Warburger Str 100, D-33095 Paderborn, Germany.
EM schweizer@physik.upb.de
RI Schweizer, Stefan/H-3518-2011; Birowosuto, Muhammad Danang/F-1853-2010
OI Birowosuto, Muhammad Danang/0000-0002-9997-6841
NR 7
TC 4
Z9 4
U1 2
U2 4
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2007
VL 4
IS 3
BP 976
EP +
DI 10.1002/pssc.200673747
PG 2
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA BGD08
UT WOS:000246104300064
ER

PT S
AU Stanek, CR
   Uberuaga, BP
   McClellan, KJ
   Levy, MR
   Grimes, RW
AF Stanek, C. R.
   Uberuaga, B. P.
   McClellan, K. J.
   Levy, M. R.
   Grimes, R. W.
BE Stutzmann, M
TI Oxygen transport mechanisms in REAlO3 scintillators
SO PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4,
   NO 3
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT 10th Europhysical Conference on Defects in Insulating Materials
CY JUL 10-14, 2006
CL Milan, ITALY
ID MINIMUM ENERGY PATHS; ELASTIC BAND METHOD; DEFECTS CREATION;
   SADDLE-POINTS; LUMINESCENCE; CRYSTALS; SIMULATION
AB The performance of oxide scintillators often suffers from phenomena related to the existence of point defects. Thus, if deleterious defects are removed, it follows that scintillator performance will improve. In the case of REAlO3 perovskites, the oxygen vacancy has been identified as the predominant electron trap site. Previous empirical efforts to minimize the concentration of this particular defect through abovalent doping have been successful. Here we discuss the results of atomic scale simulations that provide important detail regarding the mechanism by which the oxygen vacancy concentration is reduced. Specifically, we describe the complex mobility of oxygen vacancies and interstitials, which governs the recombination of these defects. The results of these simulations will aid in the synthesis of optimized scintillation materials. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 [Stanek, C. R.; Uberuaga, B. P.; McClellan, K. J.] Los Alamos Natl Lab, Mat Sci & Technol Div, POB 1663, Los Alamos, NM 87545 USA.
   [Levy, M. R.; Grimes, R. W.] Imperial Coll London, Dept Mat, London SW7 2AZ, England.
RP Stanek, CR (reprint author), Los Alamos Natl Lab, Mat Sci & Technol Div, POB 1663, Los Alamos, NM 87545 USA.
EM stanek@lanl.gov
NR 13
TC 1
Z9 1
U1 0
U2 1
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2007
VL 4
IS 3
BP 984
EP +
DI 10.1002/pssc.200673813
PG 2
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA BGD08
UT WOS:000246104300066
ER

PT S
AU Tang, M
   Lu, P
   Valdez, JA
   Stanek, CR
   Sickafus, KE
AF Tang, M.
   Lu, P.
   Valdez, J. A.
   Stanek, C. R.
   Sickafus, K. E.
BE Stutzmann, M
TI The order-disorder phase transformation in ion-irradiated rare earth
   sesquioxide DY2O3
SO PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4,
   NO 3
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT 10th Europhysical Conference on Defects in Insulating Materials
CY JUL 10-14, 2006
CL Milan, ITALY
ID WASTE FORM; ZIRCONIA; PLUTONIUM
AB In this report, we examine an irradiation-induced order-disorder phase transformation in polycrystalline pellets of the rare earth sesquioxide DY203 Using grazing incidence X-ray diffraction (GIXRD) and transmission electron microscopy (TEM). This sesquioxide is characterized by a cubic C-type rare earth structure known as bixbyite. Samples were irradiated with heavy ion Kr + (300 keV) at cryogenic temperature. GIXRD and cross-sectional TEM observations reveal that the ordered body-centered cubic bixbyite structure transforms to a disordered (anion deficient) fluorite structure in this irradiated sesquioxide. This observation is consistent with a radiation-induced disordering process in which the oxygen superlattice associated with the bixbyite structure is destroyed and the material adopts an anion disordered fluorite structure as evidenced by the disappearance of characteristic GIXRD diffraction peaks resulting from ordering of the oxygen superlattice, and similar electron diffraction pattern features. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
C1 [Tang, M.; Valdez, J. A.; Stanek, C. R.; Sickafus, K. E.] Los Alamos Natl Lab, Mat Sci & Technol Div, POB 1663, Los Alamos, NM 87545 USA.
   [Tang, M.; Lu, P.] New Mexico Inst Min & Technol, Dept Mat Engn, Socorro, NM 87801 USA.
RP Sickafus, KE (reprint author), Los Alamos Natl Lab, Mat Sci & Technol Div, POB 1663, Los Alamos, NM 87545 USA.
EM kurt@lanl.gov
FU US Department of Energy; Office of Basic Energy Sciences; Division of
   Materials Sciences and Engineering
FX This work was sponsored by the US Department of Energy, Office of Basic
   Energy Sciences, Division of Materials Sciences and Engineering.
NR 17
TC 3
Z9 3
U1 1
U2 3
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2007
VL 4
IS 3
BP 1171
EP +
DI 10.1002/pssc.200673871
PG 2
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA BGD08
UT WOS:000246104300111
ER

PT S
AU Alberi, K
   Wu, J
   Walukiewicz, W
   Yu, KM
   Dubon, OD
   Watkins, SP
   Wang, CX
   Liu, X
   Cho, YJ
   Furdyna, JK
AF Alberi, K.
   Wu, J.
   Walukiewicz, W.
   Yu, K. M.
   Dubon, O. D.
   Watkins, S. P.
   Wang, C. X.
   Liu, X.
   Cho, Y. -J.
   Furdyna, J. K.
BE Walther, M
TI Valence band anticrossing in mismatched III-V semiconductor alloys
SO PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4,
   NO 5
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT 33rd International Symposium on Compound Semiconductors
CY AUG 13-17, 2006
CL Vancouver, CANADA
ID GAAS1-XBIX; GROWTH; GAP
AB The valence band anticrossing model (VBAC) is applied to explain the composition-dependent trends in dilute GaSbxAs1-x and GaBixAs1-x alloys. Photomodulated reflectance spectroscopy (PR) of GaSbxAs1-x shows a reduction of the fundamental bandgap energy as well as an increase of the spin-orbit splitting energy with increasing x. The VBAC model predicts that these shifts are the result of a hybridization of the extended valence band states of GaAs with the localized states of the impurity atoms, which induce an upward movement of the valence band edge. Extrapolation of the model to other III-(Sb,Bi)-V alloys is also discussed. (c) 2007 WILEY-VCH Verlag Gmbh & Co. KGaA, Weinheim.
C1 [Alberi, K.; Wu, J.; Walukiewicz, W.; Yu, K. M.; Dubon, O. D.] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   [Alberi, K.; Wu, J.; Dubon, O. D.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
   [Watkins, S. P.; Wang, C. X.] Simon Fraser Univ, Dept Phys, Burnaby, BC, Canada.
   [Liu, X.; Cho, Y. -J.; Furdyna, J. K.] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
RP Alberi, K (reprint author), Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
EM kalberi@berkeley.edu
RI Yu, Kin Man/J-1399-2012; Cho, YongJin/A-1143-2013; Wu,
   Junqiao/G-7840-2011
OI Yu, Kin Man/0000-0003-1350-9642; Wu, Junqiao/0000-0002-1498-0148
FU U.S. Department of Energy [DE-AC02-05CH11231]; NSF-IGERT
FX This work is supported by the director, Office of Science, Office of
   Basic Energy Sciences, Division of Materials Sciences and Engineering,
   of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
   KA acknowledges support from NSF-IGERT.
NR 9
TC 2
Z9 2
U1 0
U2 16
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2007
VL 4
IS 5
BP 1711
EP +
DI 10.1002/pssc.200674286
PG 2
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
   Instruments & Instrumentation; Optics
SC Engineering; Science & Technology - Other Topics; Instruments &
   Instrumentation; Optics
GA BGF88
UT WOS:000246508900029
ER

PT S
AU Farshchi, R
   Chopdekar, RV
   Suzuki, Y
   Ashby, PD
   Sharp, ID
   Beeman, JW
   Haller, EE
   Dubon, OD
AF Farshchi, R.
   Chopdekar, R. V.
   Suzuki, Y.
   Ashby, P. D.
   Sharp, I. D.
   Beeman, J. W.
   Haller, E. E.
   Dubon, O. D.
BE Walther, M
TI 2D-patterned ferromagnetic III-Mn-V semiconductors for planar
   spintronics
SO PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4,
   NO 5
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT 33rd International Symposium on Compound Semiconductors
CY AUG 13-17, 2006
CL Vancouver, CANADA
ID GAMNAS
AB We demonstrate planar patterning techniques to produce isolated regions of ferromagnetic Ga1-xMnxAs embedded in a GaAs host. One technique consists of ion-implantation through lithographically defined resist, followed by pulsed-laser melting. Planar Hall-bar structures of Ga1-xMnxAs formed by this process show a large anomalous Hall signal along with negative magnetoresistance associated with the well-known hole-mediated ferromagnetic phase. In another technique patterning is achieved by selective hydrogenation of Ga1-xMnxAs, rendering exposed regions electrically insulating and magnetically inactive. The planar nature of these Hall-bars allows for tuning the ferromagnetism by the integration of lateral gates to modulate the exchange-mediating hole population in the Ga1-xMnxAs region, hence creating junction-FET functionality. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 [Farshchi, R.; Chopdekar, R. V.; Suzuki, Y.; Sharp, I. D.; Haller, E. E.; Dubon, O. D.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
   [Farshchi, R.; Ashby, P. D.; Sharp, I. D.; Beeman, J. W.; Haller, E. E.; Dubon, O. D.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Farshchi, R (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
EM rfarshchi@berkeley.edu; oddubon@berkeley.edu
RI Chopdekar, Rajesh/D-2067-2009; Sharp, Ian/I-6163-2015
OI Chopdekar, Rajesh/0000-0001-6727-6501; Sharp, Ian/0000-0001-5238-7487
FU National Science Foundation [DMR-0349257]; Office of Science; Office of
   Basic Energy Sciences; Division of Materials Sciences and Engineering;
   U.S. Department of Energy [DE-AC02-05CH11231]
FX This work was supported by the National Science Foundation under
   contract number DMR-0349257 and in part by the Director, Office of
   Science, Office of Basic Energy Sciences, Division of Materials Sciences
   and Engineering, of the U.S. Department of Energy under Contract No.
   DE-AC02-05CH11231.
NR 6
TC 11
Z9 11
U1 0
U2 7
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2007
VL 4
IS 5
BP 1755
EP +
DI 10.1002/pssc.200674285
PG 2
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
   Instruments & Instrumentation; Optics
SC Engineering; Science & Technology - Other Topics; Instruments &
   Instrumentation; Optics
GA BGF88
UT WOS:000246508900040
ER

PT S
AU Liliental-Weber, Z
   Lu, H
   Schaff, WJ
   Kryliouk, O
   Park, HJ
   Mangum, J
   Anderson, T
AF Liliental-Weber, Z.
   Lu, H.
   Schaff, W. J.
   Kryliouk, O.
   Park, H. J.
   Mangum, J.
   Anderson, T.
TI Comparison of structural perfection of InN layers and InN nanorods grown
   on the c- and r-planes of Al2O3
SO PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4
   NO 7 2007
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT International Workshop on Nitride Semiconductors 2006 (IWN 2006)
CY OCT 22-27, 2006
CL Kyoto, JAPAN
SP Japan Soc Appl Phys, Japan Soc Appl Phys, Kansai Chapter & Solid State Phys & Applicat Div, Japan Soc Soc Promot Sci, 162nd Comm Wide Bandgap Semiconduct Photon & Elect Devices, Kyoto Nanotechnol Cluster, Ritsumeikan Univ, Frontier Semiconduct Nano Elect Ctr, Res Org Sci & Engn, Japan Assoc Crystal Growth, Elect Soc, Inst Elect, Informat & Commun Engineers, Lasers & Quantum Elect & Elect Devices, IEEE Kansai Chapter, Minist Educ, Culture, Sports, Sci & Technol, Ritsumeikan Univ, Coll Sci & Engn, Japan Inoue Fdn Sci, Fdn Promot Mat Sci & Technol, Japan World Exposit 70, JEC Fund Commemorat Org, Murata Sci Fdn, Ogasawara Fdn Promot Sci & Engn, Res Fdn Electrotechnol Chubu, Fdn, Support Ctr Adv Telecommun Technol Res, Telecommun Advancement Fdn, Mitsubishi Cable Ind Ltd, NICHIA CORPORAT, NTT Photon Lab, ROHM CO Ltd, TOYODA GOSEK CO Ltd, AIXTRON AG, LayTec GmbH, MARUBUN CORPORAT, Rohm Haas Elect Mat K K, TAIYO NIPPON SANSO Corp
ID EPITAXY
AB Transmission Electron microscopy was applied to determine similarities and difference in structural perfection between InN epi-layers grown by MBE on c-and r-plane Al2O3 and InN nanocrystals grown on similar substrates using non catalytic, template-free hydride metal-organic vapor phase epitaxy. The study showed that nanocrystals had more perfect crystallinity compared to the layers. While the InN layer growth direction followed the crystallographically required epitaxial growth orientation, the nanorod growth was randomly oriented. The opposite growth polarity has been determined for the InN layers grown along c-direction (In-polarity) in comparison to nanocrystals grown along same direction (N-polarity). (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 [Liliental-Weber, Z.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   [Lu, H.; Schaff, W. J.] Cornell Univ, Dept Elect & Comp Engn, Ithaca, NY USA.
   [Mangum, J.; Anderson, T.] Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA.
RP Liliental-Weber, Z (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
EM z_liliental-weber@lbl.gov
RI Liliental-Weber, Zuzanna/H-8006-2012
FU Director, Office of Science, Office of Basic Energy Sciences, Division
   of Materials Sciences and Engineering, of the U.S; Department of Energy
   [DE-AC02-05CH11231]; US Army, Grant [FA8650-04-2-1619]
FX This work is supported by the Director, Office of Science, Office of
   Basic Energy Sciences, Division of Materials Sciences and Engineering,
   of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
   Use of the facility at the National Center for electron Microscopy is
   highly appreciated. The work at UF was partially supported by the US
   Army, Grant FA8650-04-2-1619.
NR 5
TC 5
Z9 5
U1 0
U2 2
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2007
VL 4
IS 7
BP 2469
EP +
DI 10.1002/pssc.200674907
PG 2
WC Physics, Condensed Matter
SC Physics
GA BGK76
UT WOS:000248047600064
ER

PT J
AU Samant, AN
   Dahotre, NB
AF Samant, Anoop N.
   Dahotre, Narendra B.
TI Computational prediction of grain size during rapid laser surface
   modification of Al-O ceramic
SO PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
LA English
DT Article
ID WHEEL MATERIAL; SOLIDIFICATION
AB The aim of this letter is to present a model including the fundamental non-equilibrium effects to predict the microstructure evolution during the rapid solidification of laser surface modified Al-O ceramic system to understand grain growth and the physical process involved during the treatment. The obtained data is then compared with the actual measurements from micrographs, This approach is novel compared to other work in the similar field which have looked at the process only at the macroscopic level that included the extractions of macroscopic features such as melt depth and width. Such study is important as laser surface modification can be extended to dressing of alumina grinding wheel material, a part of the Al-O ceramic system.
C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Dahotre, NB (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM ndahotre@utk.edu
NR 7
TC 1
Z9 1
U1 0
U2 4
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1862-6254
J9 PHYS STATUS SOLIDI-R
JI Phys. Status Solidi-Rapid Res. Lett.
PD JAN
PY 2007
VL 1
IS 1
BP R4
EP R6
DI 10.1002/pssr.200600016
PG 3
WC Materials Science, Multidisciplinary; Physics, Applied; Physics,
   Condensed Matter
SC Materials Science; Physics
GA 136KV
UT WOS:000244221900005
ER

PT J
AU Costen, ML
   Hall, GE
AF Costen, Matthew L.
   Hall, Gregory E.
TI Coherent and incoherent orientation and alignment of ICN photoproducts
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID ANGULAR-MOMENTUM POLARIZATION; LINEAR TRIATOMIC-MOLECULES;
   PHOTODISSOCIATION DYNAMICS; ROTATIONAL DISTRIBUTIONS; UV
   PHOTODISSOCIATION; VECTOR CORRELATION; GROUND-STATE; 355 NM;
   PHOTOFRAGMENTS; PROBE
AB We report extended measurements of the rotational polarization and correlated angular distribution of CN photofragments from ICN photodissociation, with a particular emphasis on the creation and detection of molecular orientation with circularly-polarized light. Doppler profiles of the nascent photoproducts are measured by Frequency-Modulated ( FM) transient absorption, and the resulting high signal-to-noise data are valuable for verifying the form of the angular correlations between the recoil velocity, the photofragment rotational angular momentum, and the space-fixed frame defined by the dissociation polarization. A space-fixed bipolar moment notation can be used for an unambiguous characterization of the maximal set of polarization properties that can be created with one-photon excitation and detected with one-photon Doppler-resolved absorption spectroscopy. Relating the observed polarization moments to the various coherent and incoherent, adiabatic and non-adiabatic mechanisms, that have been derived and verified extensively in the case of diatomic photodissociation to polarized atomic fragments, is not unambiguous in the case of diatomic fragments from triatomic precursors. Constraints among various polarization moments confirmed in the case of diatomic dissociation are not confirmed in this triatomic case, where the perpendicular transitions to non-degenerate A' and A'' components of a linear Omega = 1 state are qualitatively different from excitation to degenerate Omega = +/- 1 states in a diatomic molecule.
C1 Heriot Watt Univ, Sch Engn & Phys Sci, Edinburgh EH14 4AS, Midlothian, Scotland.
   Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RP Costen, ML (reprint author), Heriot Watt Univ, Sch Engn & Phys Sci, William H Perkin Bldg, Edinburgh EH14 4AS, Midlothian, Scotland.
EM m.l.costen@hw.ac.uk; gehall@bnl.gov
RI Hall, Gregory/D-4883-2013; Costen, Matthew/K-5178-2012
OI Hall, Gregory/0000-0002-8534-9783; Costen, Matthew/0000-0002-6491-9812
NR 59
TC 23
Z9 23
U1 0
U2 12
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.
PY 2007
VL 9
IS 2
BP 272
EP 287
DI 10.1039/b612131d
PG 16
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 119KL
UT WOS:000243011100007
PM 17186071
ER

PT J
AU Newton, MD
   Smalley, JF
AF Newton, Marshall D.
   Smalley, John F.
TI Interfacial bridge-mediated electron transfer: mechanistic analysis
   based on electrochemical kinetics and theoretical modelling
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Review
ID SELF-ASSEMBLED MONOLAYERS; INDUCED TEMPERATURE-JUMP;
   SCANNING-TUNNELING-MICROSCOPY; SINGLE-MOLECULE CONDUCTIVITY; METAL WORK
   FUNCTION; CHARGE-TRANSPORT; ALKANETHIOL MONOLAYERS; REORGANIZATION
   ENERGY; CONTACT RESISTANCE; DISTANCE DEPENDENCE
AB Understanding the physical and chemical factors that control the kinetics of interfacial electrontransfer ( ET) reactions is important for a large number of technological applications. The present article describes electrochemical kinetic studies of these factors, in which standard interfacial ET rate constants (k(0)(l)) have been measured for ET between substrate Au electrodes and various redox couples attached to the electrode surfaces by variable lengths (l) of oligomethylene (OM), oligophenylenevinylene (OPV) and oligophenyleneethynylene (OPE) bridges, which were constituents of mixed self-assembled monolayers (SAMs). The k(0)(l) measurements employed the indirect laser-induced temperature jump (ILIT) technique, which permits the measurement of interfacial ET rates that are orders of magnitude faster than those measurable by conventional techniques using the macroelectrodes that are the most convenient substrates for the mixed SAMs. The robustness of the measured rate constants (k(0)(l)), together with the Arrhenius activation energies (E(a)(l)) and preexponential factors (A(l)), is demonstrated by their invariance with respect to several experimental system parameters (including the chemical nature and length of the diluent component of the mixed SAM). Analysis of the kinetic results demonstrates that all of the observed interfacial ET processes proceed through a common type of transition state (predominantly associated with solvent reorganization around the redox moiety) and that the actual ET step involves direct electronic tunnelling between the Au electrode and the redox moiety. However, for the full range of l investigated, a global exponential decay of A(l) is not found for any of the three types of bridges. Possible reasons for this behavior, including the role of rate determining steps associated with adiabatic mechanisms within or beyond the transition state theory framework, are discussed, and comparisons with related conductance measurements are presented.
C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RP Newton, MD (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
EM newton@bnl.gov; smalley@bnl.gov
NR 136
TC 46
Z9 46
U1 6
U2 53
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.
PY 2007
VL 9
IS 5
BP 555
EP 572
DI 10.1039/b611448b
PG 18
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 128NX
UT WOS:000243665700001
PM 17242737
ER

PT J
AU Groenewold, GS
   Gianotto, AK
   Cossel, KC
   Van Stipdonk, MJ
   Oomens, J
   Polfer, N
   Moore, DT
   de Jong, WA
   McIlwain, ME
AF Groenewold, G. S.
   Gianotto, A. K.
   Cossel, K. C.
   Van Stipdonk, M. J.
   Oomens, J.
   Polfer, N.
   Moore, D. T.
   de Jong, W. A.
   McIlwain, M. E.
TI Mid-infrared vibrational spectra of discrete acetone-ligated cerium
   hydroxide cations
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID ELECTROSPRAY MASS-SPECTROMETRY; ION-CYCLOTRON RESONANCE; WATER-GAS
   SHIFT; PHOTON DISSOCIATION SPECTROSCOPY; ENERGY-ADJUSTED
   PSEUDOPOTENTIALS; COLLISION-INDUCED DISSOCIATION; ABINITIO
   PSEUDOPOTENTIALS; INFRARED-SPECTROSCOPY; CUO-CEO2 CATALYSTS;
   CARBON-MONOXIDE
AB Cerium(III) hydroxy reactive sites are responsible for several important heterogeneous catalysis processes, and understanding the reaction chemistry of substrate molecules like CO, H2O, and CH3OH as they occur in heterogeneous media is a challenging task. We report here the first infrared spectra of model gas-phase cerium complexes and use the results as a benchmark to assist evaluation of the accuracy of ab initio calculations. Complexes containing [CeOH](2+) ligated by three- and four-acetone molecules were generated by electrospray ionization and characterized using wavelength-selective infrared multiple photon dissociation (IRMPD). The C = O stretching frequency for the [CeOH( acetone)(4)](2+) species appeared at 1650 cm(-1) and was red-shifted by 90 cm(-1) compared to unligated acetone. The magnitude of this shift for the carbonyl frequency was even greater for the [CeOH(acetone)(3)](2+) complex: the IRMPD peak consisted of two dissociation channels, an initial elimination of acetone at 1635 cm(-1), and elimination of acetone concurrent with a charge separation producing [CeO(acetone)](+) at 1599 cm(-1), with the overall frequency centered at 1616 cm(-1). The increasing red shift observed as the number of acetone ligands decreases from four to three is consistent with transfer of more electron density per ligand in the less coordinated complexes. The lower frequency measured for the elimination/charge separation process is likely due to a combination of: (a) anharmonicity resulting from population of higher vibrational states, and (b) absorption by the initially formed photofragment [CeOH(acetone)(2)](2+). The C-C stretching frequency in the complexes is also influenced by coordination to the metal: it is blue-shifted compared to bare acetone, indicating a slight strengthening of the C-C bond in the complex, with the intensity of the absorption decreasing with decreasing ligation. Density functional theory (DFT) calculations using three different functionals (VWN, B3LYP, and PBE0) were used to predict the infrared spectra of the complexes. Calculated frequencies for the carbonyl stretch are within 40 cm(-1) of the IRMPD of the three- acetone complex measured using the single acetone loss, and within 60 cm(-1) of the measurement for the four-acetone complexes. The B3LYP functionals provided the best agreement with the measured spectra, with the VWN modestly lower and PBE0 modestly higher. The C-C stretching frequencies calculated using B3LYP are higher in energy than the measured values by similar to 30 cm(-1), and reproduce the observed trend which shows that the C-C stretching frequency decreases with increasing ligation. Agreement between C-C frequency and calculation was not as good using the VWN functional, but still within 70 cm(-1). The results provide an evaluation of changes in the acceptor properties of the metal center as ligands are added, and of the utility of DFT for modeling f-block coordination complexes.
C1 Idaho Natl Lab, Idaho Falls, ID USA.
   Wichita State Univ, Wichita, KS USA.
   FOM Inst Plasmafys, Nieuwegein, Netherlands.
   Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Groenewold, GS (reprint author), Idaho Natl Lab, Idaho Falls, ID USA.
EM gary.groenewold@inl.gov; anita.gianotto@inl.gov; cosselk@caltech.edu;
   mike.vanstipdonk@wichita.edu; joso@rijnh.nl; polfer@rijnh.nl;
   dtmoore@berkeley.edu; bert.dejong@pnl.gov; michael.mcilwain@inl.gov
RI DE JONG, WIBE/A-5443-2008; Moore, David/A-7393-2008; Oomens,
   Jos/F-9691-2015
OI DE JONG, WIBE/0000-0002-7114-8315; 
NR 81
TC 20
Z9 20
U1 0
U2 18
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.
PY 2007
VL 9
IS 5
BP 596
EP 606
DI 10.1039/b613029a
PG 11
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 128NX
UT WOS:000243665700005
PM 17242741
ER

PT J
AU Guhr, M
   Bargheer, M
   Fushitani, M
   Kiljunen, T
   Schwentner, N
AF Guehr, M.
   Bargheer, M.
   Fushitani, M.
   Kiljunen, T.
   Schwentner, N.
TI Ultrafast dynamics of halogens in rare gas solids
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Review
ID FEMTOSECOND PUMP-PROBE; WAVE-PACKET INTERFEROMETRY; MEASURING
   FLUORESCENCE INTERFERENCE; INELASTIC NEUTRON-SCATTERING; CLASSICAL
   MOLECULAR-DYNAMICS; GROUND SURFACE DYNAMICS; STOKES-RAMAN-SCATTERING;
   COHERENT THZ PHONONS; PHASE-LOCKED PULSES; VIBRATIONAL-RELAXATION
AB We perform time resolved pump-probe spectroscopy on small halogen molecules ClF, Cl-2, Br-2, and I-2 embedded in rare gas solids (RGS). We find that dissociation, angular depolarization, and the decoherence of the molecule is strongly influenced by the cage structure. The well ordered crystalline environment facilitates the modelling of the experimental angular distribution of the molecular axis after the collision with the rare gas cage. The observation of many subsequent vibrational wave packet oscillations allows the construction of anharmonic potentials and indicate a long vibrational coherence time. We control the vibrational wave packet revivals, thereby gaining information about the vibrational decoherence. The coherence times are remarkable larger when compared to the liquid or high pressure gas phase. This fact is attributed to the highly symmetric molecular environment of the RGS. The decoherence and energy relaxation data agree well with a perturbative model for moderate vibrational excitation and follow a classical model in the strong excitation limit. Furthermore, a wave packet interferometry scheme is applied to deduce electronic coherence times. The positions of those cage atoms, excited by the molecular electronic transitions are modulated by long living coherent phonons of the RGS, which we can probe via the molecular charge transfer states.
C1 Free Univ Berlin, Inst Expt Phys, D-14195 Berlin, Germany.
   SLAC, Stanford PULSE Ctr, Menlo Pk, CA 94075 USA.
   Max Born Inst, D-12489 Berlin, Germany.
   Univ Helsinki, Dept Chem, FIN-00014 Helsinki, Finland.
RP Schwentner, N (reprint author), Free Univ Berlin, Inst Expt Phys, Arnimallee 14, D-14195 Berlin, Germany.
EM nikolaus.schwentner@physik.fu-berlin.de
RI Guehr, Markus/B-7446-2015
OI Guehr, Markus/0000-0002-9111-8981
NR 219
TC 30
Z9 30
U1 2
U2 19
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
   ENGLAND
SN 1463-9076
EI 1463-9084
J9 PHYS CHEM CHEM PHYS
JI Phys. Chem. Chem. Phys.
PY 2007
VL 9
IS 7
BP 779
EP 801
DI 10.1039/b609058n
PG 23
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 134DN
UT WOS:000244062900001
PM 17287873
ER

PT J
AU Alapati, SV
   Johnson, JK
   Sholl, DS
AF Alapati, Sudhakar V.
   Johnson, J. Karl
   Sholl, David S.
TI Using first principles calculations to identify new destabilized metal
   hydride reactions for reversible hydrogen storage
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID N-H SYSTEM; LITHIUM AMIDE; 1ST-PRINCIPLES CALCULATIONS; ALUMINUM
   HYDRIDES; CARBON MATERIALS; LIBH4; MAGNESIUM; ALLOYS; DEHYDROGENATION;
   PHASE
AB Hydrides of period 2 and 3 elements are promising candidates for hydrogen storage, but typically have heats of reaction that are too high to be of use for fuel cell vehicles. Recent experimental work has focused on destabilizing metal hydrides through mixing metal hydrides with other compounds. A very large number of possible destabilized metal hydride reaction schemes exist, but the thermodynamic data required to assess the enthalpies of these reactions are not available in many cases. We have used density functional theory calculations to predict the reaction enthalpies for more than 300 destabilization reactions that have not previously been reported. The large majority of these reactions are predicted not to be useful for reversible hydrogen storage, having calculated reaction enthalpies that are either too high or too low, and hence these reactions need not be investigated experimentally. Our calculations also identify multiple promising reactions that have large enough hydrogen storage capacities to be useful in practical applications and have reaction thermodynamics that appear to be suitable for use in fuel cell vehicles and are therefore promising candidates for experimental work.
C1 Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA.
   Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
RP Alapati, SV (reprint author), Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA.
RI Johnson, Karl/E-9733-2013
OI Johnson, Karl/0000-0002-3608-8003
NR 95
TC 137
Z9 138
U1 5
U2 25
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.
PY 2007
VL 9
IS 12
BP 1438
EP 1452
DI 10.1039/b617927d
PG 15
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 145MM
UT WOS:000244869200004
PM 17356751
ER

PT J
AU Chernyshova, IV
   Hochella, MF
   Madden, AS
AF Chernyshova, I. V.
   Hochella, M. F., Jr.
   Madden, A. S.
TI Size-dependent structural transformations of hematite nanoparticles. 1.
   Phase transition
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Review
ID RAY PHOTOELECTRON-SPECTROSCOPY; SYNTHETIC 6-LINE FERRIHYDRITE; BULK
   THERMODYNAMIC PROPERTIES; IRON-OXIDES; MAGHEMITE GAMMA-FE2O3;
   OPTICAL-PROPERTIES; ELECTRON NANODIFFRACTION; RAMAN MICROSPECTROSCOPY;
   INFRARED-SPECTROSCOPY; 2-LINE FERRIHYDRITE
AB Using Fourier Transform InfraRed (FTIR) spectroscopy, Raman spectroscopy, X-ray diffraction (XRD), and Transmission Electron Microscopy (TEM), we characterize the structure and/or morphology of hematite (alpha-Fe2O3) particles with sizes of 7, 18, 39 and 120 nm. It is found that these nanoparticles possess maghemite (gamma-Fe2O3)-like defects in the near surface regions, to which a vibrational mode at 690 cm(-1), active both in FTIR and Raman spectra, is assigned. The fraction of the maghemite-like defects and the net lattice disorder are inversely related to the particle size. However, the effect is opposite for nanoparticles grown by sintering of smaller hematite precursors under conditions when the formation of a uniform hematite- like structure throughout the aggregate is restricted by kinetic issues. This means that not only particle size but also the growth kinetics determines the structure of the nanoparticles. The observed structural changes are interpreted as size-induced alpha-Fe2O3 <-> gamma-Fe2O3 phase transitions. We develop a general model that considers spinel defects and absorbed/adsorbed species (in our case, hydroxyls) as dominant controls on structural changes with particle size in hematite nanoparticles, including solid-state phase transitions. These changes are represented by trajectories in a phase diagram built in three phase coordinates-concentrations of spinel defects, absorbed impurities, and adsorbed species. The critical size for the onset of the alpha ->gamma phase transition depends on the particle environment, and for the dry particles used in this study is about 40 nm. The model supports the existence of intermediate phases (protohematite and hydrohematite) during dehydration of goethite. We also demonstrate that the hematite structure is significantly less defective when the nanoparticles are immersed in water or KBr matrix, which is explained by the effects of the electrochemical double layer and increased rigidity of the particle environment. Finally, we revise the problem of applicability of IR spectroscopy to the lattice vibrations of hematite nanoparticles, demonstrating that structural comparison of different samples is much more reliable if it is based on the Eu band at about 460 cm(-1) and the spinel band at 690 cm(-1), instead of the A(2u)/E-u band at about 550 cm(-1) used in previous work. The new methodology is applied to analysis of the reported IR spectra of Martian hematite.
C1 Virginia Tech, Ctr NanoBioEarth, Dept Geosci, Blacksburg, VA 24061 USA.
   Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Chernyshova, IV (reprint author), Virginia Tech, Ctr NanoBioEarth, Dept Geosci, Blacksburg, VA 24061 USA.
EM ichernyshova@mphf.spbstu.ru
RI Chernyshova, Irina/C-6781-2016
OI Chernyshova, Irina/0000-0001-6702-7572
NR 127
TC 157
Z9 157
U1 24
U2 169
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
   ENGLAND
SN 1463-9076
EI 1463-9084
J9 PHYS CHEM CHEM PHYS
JI Phys. Chem. Chem. Phys.
PY 2007
VL 9
IS 14
BP 1736
EP 1750
DI 10.1039/b618790k
PG 15
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 151QC
UT WOS:000245304500011
PM 17396185
ER

PT J
AU Stowe, AC
   Shaw, WJ
   Linehan, JC
   Schmid, B
   Autrey, T
AF Stowe, Ashley C.
   Shaw, Wendy J.
   Linehan, John C.
   Schmid, Benjamin
   Autrey, Tom
TI In situ solid state B-11 MAS-NMR studies of the thermal decomposition of
   ammonia borane: mechanistic studies of the hydrogen release pathways
   from a solid state hydrogen storage material
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID DEHYDROGENATION; DIAMMONIATE; DIBORANE
AB The mechanism of hydrogen release from solid state ammonia borane (AB) has been investigated via in situ solid state B-11 and B-11{H-1} MAS-NMR techniques in external fields of 7.1 T and 18.8 T at a decomposition temperature of 88 degrees C, well below the reported melting point. The decomposition of AB is well described by an induction, nucleation and growth mechanistic pathway. During the induction period, little hydrogen is released from AB; however, a new species identified as a mobile phase of AB is observed in the B-11 NMR spectra. Subsequent to induction, at reaction times when hydrogen is initially being released, three additional species are observed: the diammoniate of diborane (DADB), [(NH3)(2)BH2](+)[BH4](-), and two BH2N2 species believed to be the linear (NH3BH2NH2BH3) and cyclic dimer (NH2BH2)(2) of aminoborane. At longer reaction times the sharper features are replaced by broad, structureless peaks of a complex polymeric aminoborane (PAB) containing both BH2N2 and BHN3 species. The following mechanistic model for the induction, nucleation and growth for AB decomposition leading to formation of hydrogen is proposed: (i) an induction period that yields a mobile phase of AB caused by disruption of the dihydrogen bonds; (ii) nucleation that yields reactive DADB from the mobile AB; and (iii) growth that includes a bimolecular reaction between DADB and AB to release the stored hydrogen.
C1 Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Autrey, T (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
NR 25
TC 251
Z9 254
U1 6
U2 71
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.
PY 2007
VL 9
IS 15
BP 1831
EP 1836
DI 10.1039/b617781f
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 153XY
UT WOS:000245472600010
PM 17415495
ER

PT J
AU Parsons, BF
   Sheehan, SM
   Yen, TA
   Neumark, DM
   Wehres, N
   Weinkauf, R
AF Parsons, Bradley F.
   Sheehan, Sean M.
   Yen, Terry A.
   Neumark, Daniel M.
   Wehres, Nadine
   Weinkauf, Rainer
TI Anion photoelectron imaging of deprotonated thymine and cytosine
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID LOW-ENERGY ELECTRONS; MODEL DNA FRAGMENTS; STRAND BREAKS; ATTACHMENT;
   DAMAGE; SPECTROSCOPY; NUCLEOBASES; CLEAVAGE; URACIL; BASES
AB We report the anion photoelectron spectra of deprotonated thymine and cytosine at 3.496 eV photodetachment energy using velocity-mapped imaging. The photoelectron spectra of both species exhibit bands resulting from detachment transitions between the anion ground state and the ground state of the neutral radical. Franck - Condon simulations identify the anion isomers that contribute to the observed photoelectron spectrum. For both thymine and cytosine, the photoelectron spectra are consistent with anions formed by removal of a proton from the N atom that normally attaches to the sugar in the nucleotide (N1). For deprotonated thymine, the photoelectron spectrum shows a band due to a ring breathing vibration excited during the photodetachment transition. The electron affinity for the dehydrogenated thymine radical is determined as 3.250 +/- 0.015 eV. For deprotonated cytosine, the photoelectron spectrum lacks any resolved structure and the electron affinity of the dehydrogenated cytosine radical is determined to be 3.037 +/- 0.015 eV. By combining the electron affinity with previously measured gas phase acidities of thymine and cytosine, we determine the bond dissociation energy for the N - H bond that is broken.
C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
   Univ Dusseldorf, Inst Phys Chem & Elektrochem 1, D-40225 Dusseldorf, Germany.
RP Neumark, DM (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM dneumark@berkeley.edu
RI Neumark, Daniel/B-9551-2009
OI Neumark, Daniel/0000-0002-3762-9473
NR 36
TC 22
Z9 22
U1 2
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.
PY 2007
VL 9
IS 25
BP 3291
EP 3297
DI 10.1039/b703045b
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 180MC
UT WOS:000247367200011
PM 17579738
ER

PT J
AU Somorjai, GA
   York, RL
   Butcher, D
   Park, JY
AF Somorjai, Gabor A.
   York, Roger L.
   Butcher, Derek
   Park, Jeong Y.
TI The evolution of model catalytic systems; studies of structure, bonding
   and dynamics from single crystal metal surfaces to nanoparticles, and
   from low pressure (< 10(-3) Torr) to high pressure (> 10(-3) Torr) to
   liquid interfaces
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Review
ID SUM-FREQUENCY-GENERATION; SCANNING-TUNNELING-MICROSCOPY; ATOMIC-FORCE
   MICROSCOPY; ELECTRON-BEAM LITHOGRAPHY; PLATINUM NANOWIRE ARRAYS;
   VIBRATIONAL SPECTROSCOPY; CARBON-MONOXIDE; ETHYLENE HYDROGENATION;
   AMMONIA-SYNTHESIS; CO OXIDATION
AB The material and pressure gap has been a long standing challenge in the field of heterogeneous catalysis and have transformed surface science and biointerfacial research. In heterogeneous catalysis, the material gap refers to the discontinuity between well-characterized model systems and industrially relevant catalysts. Single crystal metal surfaces have been useful model systems to elucidate the role of surface defects and the mobility of reaction intermediates in catalytic reactivity and selectivity. As nanoscience advances, we have developed nanoparticle catalysts with lithographic techniques and colloidal syntheses. Nanoparticle catalysts on oxide supports allow us to investigate several important ingredients of heterogeneous catalysis such as the metal-oxide interface and the influence of noble metal particle size and surface structure on catalytic selectivity. Monodispersed nanoparticle and nanowire arrays were fabricated for use as model catalysts by lithographic techniques. Platinum and rhodium nanoparticles in the 1 - 10 nm range were synthesized in colloidal solutions in the presence of polymer capping agents. The most catalytically active systems are employed at high pressure or at solid - liquid interfaces. In order to study the high pressure and liquid interfaces on the molecular level, experimental techniques with which we bridged the pressure gap in catalysis have been developed. These techniques include the ultrahigh vacuum system equipped with high pressure reaction cell, high pressure Sum Frequency Generation (SFG) vibration spectroscopy, High Pressure Scanning Tunneling Microscopy (HP-STM), and High Pressure X-ray Photoemission Spectroscopy (HP-XPS), and Quartz Crystal Microbalance (QCM). In this article, we overview the development of experimental techniques and evolution of the model systems for the research of heterogeneous catalysis and biointerfacial studies that can shed light on the long-standing issues of materials and pressure gaps.
C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM somorjai@berkeley.edu
RI York, Roger/C-6547-2008; Park, Jeong Young/A-2999-2008
OI York, Roger/0000-0002-5105-6800; 
NR 109
TC 88
Z9 88
U1 7
U2 97
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
   ENGLAND
SN 1463-9076
EI 1463-9084
J9 PHYS CHEM CHEM PHYS
JI Phys. Chem. Chem. Phys.
PY 2007
VL 9
IS 27
BP 3500
EP 3513
DI 10.1039/b618805b
PG 14
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 186TI
UT WOS:000247800700005
PM 17612717
ER

PT J
AU Ho, G
   Ong, MT
   Caspersen, KJ
   Carter, EA
AF Ho, Gregory
   Ong, Mitchell T.
   Caspersen, Kyle J.
   Carter, Emily A.
TI Energetics and kinetics of vacancy diffusion and aggregation in shocked
   aluminium via orbital-free density functional theory
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID POSITRON-ANNIHILATION SPECTROSCOPY; FINDING SADDLE-POINTS; MINIMUM
   ENERGY PATHS; MOLECULAR-DYNAMICS; DUCTILE FRACTURE; SUPERABUNDANT
   VACANCIES; LUBRICATION AGENTS; DISLOCATION-MOTION; FORMATION ENTHALPY;
   BINDING-ENERGIES
AB A possible mechanism for shock-induced failure in aluminium involves atomic vacancies diffusing through the crystal lattice and agglomerating to form voids, which continue to grow, ultimately resulting in ductile fracture. We employ orbital-free density functional theory, a linear-scaling first-principles quantum mechanics method, to study vacancy formation, diffusion, and aggregation in aluminium under shock loading conditions of compression and tension. We calculate vacancy formation and migration energies, and find that while nearest-neighbor vacancy pairs are unstable, next-nearest-neighbor vacancy pairs are stable. As the number of nearby vacancies increases, we predict that vacancy clusters preferentially grow through next-nearestneighbor vacancies. The energetics are found to be greatly affected by expansion and compression, leading to insight as to how vacancies behave under shock conditions.
C1 Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA.
   Princeton Univ, Dept Chem, Princeton, NJ 08544 USA.
   Univ Illinois, Dept Chem, Urbana, IL 61801 USA.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Carter, EA (reprint author), Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA.
RI Carter, Emily/P-4075-2014
NR 80
TC 39
Z9 39
U1 0
U2 10
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.
PY 2007
VL 9
IS 36
BP 4951
EP 4966
DI 10.1039/b705455f
PG 16
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 210BP
UT WOS:000249432000001
PM 17851591
ER

PT J
AU Pauler, DK
   Henson, NJ
   Kress, JD
AF Pauler, Denise K.
   Henson, Neil J.
   Kress, Joel D.
TI A mechanism for the decomposition of dinitropropyl compounds
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID THERMAL-DECOMPOSITION; PHASE DECOMPOSITION; ENERGETIC MATERIALS;
   NITROPLASTICIZER; 2-NITROPROPANE; EXPLOSIVES; RESONANCE; PATHWAYS
AB A decomposition mechanism is proposed for 2,2-dinitro-1-methoxypropane, a compound whose structure resembles the nitroplasticizer (NP) component of plastic-bonded explosive PBX 9501. A library of key reactions is presented and is based on the results of NP aging studies and existing decomposition mechanisms for similar nitro compounds. Density functional electronic structure calculations on these reactions were used to develop a decomposition mechanism at lower temperatures, which begins with HONO elimination and leads to intermediates that can produce CO, CO2, NO, and N2O gases. These gases were observed in low temperature ( 48 to 64 degrees C) aging studies of NP. A high temperature mechanism involving NO2 scission is compared to a thermal decomposition mechanism determined by simultaneous thermogravimetric modulated beam mass spectrometry. The calculated energy barriers for HONO elimination and NO2 scission in the gas phase are reported and compared to experimental results.
C1 Colorado Sch Mines, Div Engn, Golden, CO 80401 USA.
   Los Alamos Natl Lab, Theoret Chem & Mol Phys, Los Alamos, NM USA.
RP Kress, JD (reprint author), Colorado Sch Mines, Div Engn, Golden, CO 80401 USA.
EM dpauler@mines.edu; neil.henson@lanl.gov; jdk@lanl.gov
OI Henson, Neil/0000-0002-1842-7884
NR 32
TC 5
Z9 5
U1 2
U2 7
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.
PY 2007
VL 9
IS 37
BP 5121
EP 5126
DI 10.1039/b707604e
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 211ZW
UT WOS:000249564300007
PM 17878988
ER

PT J
AU Howle, CR
   Homer, CJ
   Hopkins, RJ
   Reid, JP
AF Howle, Chris R.
   Homer, Chris J.
   Hopkins, Rebecca J.
   Reid, Jonathan P.
TI Probing the evaporation of ternary ethanol-methanol-water droplets by
   cavity enhanced Raman scattering
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID SINGLE AEROSOL DROPLETS; PARTICULATE MATTER; ORGANIC AEROSOL;
   DRUG-DELIVERY; FUEL DROPLETS; MASS-TRANSFER; SIZE; MICRODROPLETS;
   EVOLUTION; DYNAMICS
AB Cavity enhanced Raman scattering is used to characterise the evolving composition of ternary aerosol droplets containing methanol, ethanol and water during evaporation into a dry nitrogen atmosphere. Measurements made using non-linear stimulated Raman scattering from these ternary alcohol-water droplets allow the in situ determination of the concentration of the two alcohol components with high accuracy. The overlapping spontaneous Raman bands of the two alcohol components, arising from C-H stretching vibrational modes, are spectrally-resolved in stimulated Raman scattering measurements. We also demonstrate that the evaporation measurements are consistent with a quasi-steady state evaporation model, which can be used to interpret the evaporation dynamics occurring at a range of pressures at a particular evaporation time.
C1 Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England.
   Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Reid, JP (reprint author), Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England.
RI Reid, Jonathan/D-9411-2013; 
OI Reid, Jonathan/0000-0001-6022-1778
NR 40
TC 7
Z9 7
U1 1
U2 9
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.
PY 2007
VL 9
IS 39
BP 5344
EP 5352
DI 10.1039/b706211g
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 217CH
UT WOS:000249925500017
PM 17914471
ER

PT J
AU Wyslouzil, BE
   Wilemski, G
   Strey, R
   Seifert, S
   Winans, RE
AF Wyslouzil, Barbara E.
   Wilemski, Gerald
   Strey, Reinhard
   Seifert, Soenke
   Winans, Randall E.
TI Small angle X-ray scattering measurements probe water nanodroplet
   evolution under highly non-equilibrium conditions
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID HOMOGENEOUS NUCLEATION; SYNCHROTRON-RADIATION; NEUTRON-SCATTERING;
   LIGHT-SCATTERING; SOOT INCEPTION; LAVAL NOZZLE; GROWTH; CONDENSATION;
   RATES
AB Our in situ small angle X-ray scattering (SAXS) measurements yield an unprecedented and detailed view of rapidly evolving H2O nanodroplets formed in supersonic nozzles. The SAXS experiments produce spectra in a few seconds that are comparable to small angle neutron scattering (SANS) spectra requiring several hours of integration time and the use of deuterated compounds. These measurements now make it possible to quantitatively determine the maximum nucleation and growth rates of small droplets formed under conditions that are far from equilibrium. Particle growth is directly followed from about 10 mu s to 100 mu s after particle formation with growth rates of similar to 0.2 to 0.02 nm mu s(-1). The peak H2O nucleation rates lie between 10(17) and 10(18) cm(-3) s(-1).
C1 Ohio State Univ, Chem & Biomol Engn Dept, Columbus, OH 43210 USA.
   Univ Missouri, Dept Phys, Rolla, MO 65409 USA.
   Univ Cologne, Inst Phys Chem, Cologne, Germany.
   Argonne Natl Lab, Adv Photon Source, Xray Sci Div, Argonne, IL 60439 USA.
RP Wyslouzil, BE (reprint author), Ohio State Univ, Chem & Biomol Engn Dept, Columbus, OH 43210 USA.
RI Wyslouzil, Barbara/G-8219-2012; 
OI Wyslouzil, Barbara/0000-0001-9763-5990
NR 17
TC 22
Z9 22
U1 1
U2 12
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.
PY 2007
VL 9
IS 39
BP 5353
EP 5358
DI 10.1039/b709363b
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 217CH
UT WOS:000249925500018
PM 17914472
ER

PT J
AU Wasylenko, W
   Frei, H
AF Wasylenko, Walter
   Frei, Heinz
TI Direct observation of the kinetically relevant site of CO hydrogenation
   on supported Ru catalyst at 700 K by time-resolved FT-IR spectroscopy
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID CARBON-MONOXIDE HYDROGENATION; HETEROGENEOUS METHANATION; RUTHENIUM
   CATALYSTS; C2H4 HYDROGENATION; PT/AL2O3 CATALYST; RU/AL2O3 CATALYST;
   INFRARED-SPECTRA; SURFACE; ADSORPTION; RU(001)
AB Time-resolved FT-IR spectra of carbon monoxide hydrogenation over alumina-supported ruthenium particles were recorded on the millisecond time scale at 700 K using pulsed release of CO and a continuous flow of H-2-N-2 (ratio 0.067 or 0.15, 1 atm total pressure). Adsorbed carbon monoxide was detected along with gas phase products methane ( 3016 and 1306 cm(-1)), water ( 1900-1300 cm(-1)), and carbon dioxide ( 2348 cm(-1)). Aside from adsorbed CO, no other surface species were observed. The rate of formation of methane is 2.5 +/- 0.4 s(-1) and coincides with the rate of carbon dioxide growth (3.4 +/- 0.6 s(-1)), thus indicating that CH4 and CO2 originate from a common intermediate. The broad band of adsorbed carbon monoxide has a maximum at 2010 cm(-1) at early times ( 36 ms) that shifts gradually to 1960 cm(-1) over a period of 3 s as a result of the decreasing surface concentration of CO. Kinetic analysis of the adsorbed carbon monoxide reveals that surface sites absorbing at the high frequency end of the infrared band are temporally linked to gas phase product growth. Specifically, a ( linear) CO site at 2026 cm(-1) decays with a rate constant of 2.9 +/- 0.1 s(-1), which coincides with the rise constant of CH4. This demonstrates that the linear CO site at 2026 cm(-1) is the kinetically most relevant one for the rate-determining CO dissociation step under reaction conditions at 700 K.
C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Frei, H (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
NR 35
TC 9
Z9 9
U1 5
U2 29
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.
PY 2007
VL 9
IS 40
BP 5497
EP 5502
DI 10.1039/b706689a
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 219LE
UT WOS:000250085600010
PM 17925976
ER

PT J
AU Subotnik, JE
   Sodt, A
   Head-Gordon, M
AF Subotnik, Joseph E.
   Sodt, Alex
   Head-Gordon, Martin
TI Localized orbital theory and ammonia triborane
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID BODY PERTURBATION-THEORY; AUXILIARY BASIS-SETS; POLYATOMIC-MOLECULES;
   IDENTITY APPROXIMATION; MICROWAVE-SPECTRUM; HYDROGEN STORAGE; BORON
   HYDRIDES; WAVE-FUNCTIONS; AB-INITIO; MATRICES
AB We proposed a new and efficient method for computing localized Edmiston-Ruedenberg (ER) orbitals, which are those localized orbitals that maximize self-interaction. In this paper, we improve upon our previous algorithm in two ways. First, we incorporate the resolution of the identity (RI) and atomic resolution of the identity (ARI) approximations when generating the relevant integrals, which allows for a drastic reduction in computational cost. Second, after convergence to a stationary point, we efficiently calculate the lowest mode of the Hessian matrix in order to either (i) confirm that we have found a minimum, or if not, (ii) move us away from the current saddle point. This gives our algorithm added stability. As a chemical example, in this paper, we investigate the electronic structure (including the localized orbitals) of ammonia triborane (NH(3)B(3)H(7)). Though ammonia triborane is a very electron-defficient compound, it forms a stable white powder which is now being investigated as a potential hydrogen storage material. In contrast to previous electronic structure predictions, our calculations show that ammonia triborane has one localized molecular orbital in the center of the electron-defficient triborane ring (much like the single molecular orbital in H3 (+)), which gives the molecule added energetic stability. Furthermore, we believe that NH3B3H7 is the smallest stable molecule supporting such a closed, three-center BBB bond.
C1 Univ Calif Berkeley, Biophys Program, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Subotnik, JE (reprint author), Univ Calif Berkeley, Biophys Program, Berkeley, CA 94720 USA.
EM subotnik@post.harvard.edu; alexsodt@berkeley.edu; mhg@chem.berkeley.edu
NR 54
TC 18
Z9 18
U1 0
U2 7
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.
PY 2007
VL 9
IS 41
BP 5522
EP 5530
DI 10.1039/b709171k
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 223JS
UT WOS:000250366900002
PM 17957308
ER

PT J
AU Glezakou, VA
   Dupuis, M
   Mundy, CJ
AF Glezakou, Vassiliki-Alexandra
   Dupuis, Michel
   Mundy, Christopher J.
TI Acid/base equilibria in clusters and their role in proton exchange
   membranes: computational insight
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID POLYMER ELECTROLYTE MEMBRANES; PERFLUOROSULFONIC ACID MEMBRANES; SPACE
   GAUSSIAN PSEUDOPOTENTIALS; STATISTICAL-MECHANICAL MODEL; DIELECTRIC
   SATURATION; SULFONIC-ACID; DIFFUSION-COEFFICIENTS; PHOSPHONIC ACID;
   WATER; ENERGY
AB We describe molecular orbital theory and ab initio molecular dynamics studies of acid/ base equilibria of clusters AH: ( H2O)(n) double left right arrow A(-): H+(H2O)(n) in low hydration regime ( n = 1-4), where AH is a model of perfluorinated sulfonic acids, RSO3H ( R = CF3CF2), encountered in polymer electrolyte membranes for fuel cells. Free energy calculations on the neutral and ion pair structures for n = 3 indicate that the two configurations are close in energy and are accessible in the fluctuation dynamics of proton transport. For n = 1, 2 the only relevant configuration is the neutral form. This was verified through ab initio metadynamics simulations. These findings suggest that bases are directly involved in the proton transport at low, n = 3, hydration level, but not at lower hydration levels, n <= 2. In addition, the gas phase proton affinity of the model sulfonic acid H was found to be comparable to the proton affinity of water. The free energy pro. le for proton exchange between a protonated acid-water cluster configuration and a neutral acid-hydronium ion cluster configuration showed that such configurations are nearly isoenergetic. Thus, protonated acids can also play a role in proton transport under low hydration conditions and under high concentration of protons.
C1 Pacific NW Natl Lab, Fund Sci Directorate, Div Mat & Chem Sci, Richland, WA 99352 USA.
RP Glezakou, VA (reprint author), Pacific NW Natl Lab, Fund Sci Directorate, Div Mat & Chem Sci, Richland, WA 99352 USA.
NR 37
TC 42
Z9 42
U1 1
U2 18
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.
PY 2007
VL 9
IS 43
BP 5752
EP 5760
DI 10.1039/b709752b
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 225YM
UT WOS:000250554200011
PM 19462570
ER

PT J
AU Aldegunde, J
   Aoiz, FJ
   Saez-Rabanos, V
   Kendrickd, BK
   de Miranda, MP
AF Aldegunde, Jesus
   Aoiz, F. Javier
   Saez-Rabanos, Vicente
   Kendrickd, Brian K.
   de Miranda, Marcelo P.
TI The canonical and other mechanisms of elementary chemical reactions
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID ULTRACOLD TEMPERATURES; BIMOLECULAR REACTIONS; DENSITY-MATRIX; QUANTUM;
   POLARIZATION; DYNAMICS; SCATTERING; MOLECULES; STEREODYNAMICS; PARTICLES
AB This article introduces a definition of the concept of elementary reaction mechanism that, while conforming to the traditional view of reaction mechanisms as dynamical processes whereby reagents are transformed into products, sharpens it by requiring reagent and product states to be completely specified and fully correlated. This leads to well-defined mathematical requirements for classification of a dynamical process as a reaction mechanism and also to a straightforward mathematical procedure for the determination of a special class of independent collision mechanisms that are dubbed '' canonical ''. Canonical mechanisms result from an exact decomposition of the differential cross section of the reaction and form a complete orthogonal basis in terms of which all reaction mechanisms can be described. Examples involving the benchmark F + H-2 and D + H-2 reactions at energies ranging from ultralow to hyperthermal illustrate how canonical and other reaction mechanisms can be visualised and also how analysis of a reaction in terms of its canonical mechanisms can provide insight into its dynamics.
C1 Univ Leeds, Sch Chem, Leeds LS2 9JT, W Yorkshire, England.
   Univ Salamanca, Fac Ciencias Quim, Grp Dinam Mol, Dept Quim Fis, E-37008 Salamanca, Spain.
   Univ Complutense, Fac Quim, Dept Quim Fis, E-28040 Madrid, Spain.
   Univ Politecn Madrid, Escuela Tecn Super Ingn Montes, Dept Quim & Bioquim, E-28040 Madrid, Spain.
   Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP de Miranda, MP (reprint author), Univ Leeds, Sch Chem, Leeds LS2 9JT, W Yorkshire, England.
EM m.miranda@leeds.ac.uk
RI Aoiz, F. Javier/G-8240-2015; Aldegunde, Jesus/H-4448-2015
OI Aoiz, F. Javier/0000-0001-5718-5905; Aldegunde,
   Jesus/0000-0003-4685-0126
NR 51
TC 7
Z9 7
U1 0
U2 6
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.
PY 2007
VL 9
IS 43
BP 5794
EP 5808
DI 10.1039/b707190f
PG 15
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 225YM
UT WOS:000250554200016
PM 19462575
ER

PT J
AU Haxton, DJ
   Rescigno, TN
   McCurdy, CW
AF Haxton, Daniel J.
   Rescigno, T. N.
   McCurdy, C. W.
TI Dissociative electron attachment to the H2O molecule. II. Nuclear
   dynamics on coupled electronic surfaces within the local complex
   potential model
SO PHYSICAL REVIEW A
LA English
DT Article
ID TRIATOMIC NEGATIVE-IONS; AB-INITIO TREATMENT; CROSS-SECTIONS;
   RENNER-TELLER; REACTIVE SCATTERING; PROPAGATING WAVEPACKETS;
   VIBRATIONAL-EXCITATION; ANGULAR-DEPENDENCE; BOOMERANG MODEL;
   GENERAL-ASPECTS
AB We report the results of a first-principles study of dissociative electron attachment to H2O. The cross sections were obtained from nuclear dynamics calculations carried out in full dimensionality within the local complex potential model by using the multiconfiguration time-dependent Hartree method. The calculations employ our previously obtained global, complex-valued, potential-energy surfaces for the three (B-2(1), (2)A(1), and B-2(2)) electronic Feshbach resonances involved in this process. These three metastable states of H2O- undergo several degeneracies, and we incorporate both the Renner-Teller coupling between the B-2(1) and (2)A(1) states as well as the conical intersection between the (2)A(1) and B-2(2) states into our treatment. The nuclear dynamics are inherently multidimensional and involve branching between different final product arrangements as well as extensive excitation of the diatomic fragment. Our results successfully mirror the qualitative features of the major fragment channels observed, but are less successful in reproducing the available results for some of the minor channels. We comment on the applicability of the local complex potential model to such a complicated resonant system.
C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   Univ Calif Davis, Dept Appl Sci & Chem, Davis, CA 95616 USA.
RP Haxton, DJ (reprint author), Univ Colorado, Dept Phys, Boulder, CO 80309 USA.
NR 62
TC 37
Z9 37
U1 1
U2 10
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 JAN
PY 2007
VL 75
IS 1
AR 012711
DI 10.1103/PhysRevA.75.012711
PG 24
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 131TY
UT WOS:000243894100086
ER

PT J
AU Haxton, DJ
   McCurdy, CW
   Rescigno, TN
AF Haxton, Daniel J.
   McCurdy, C. W.
   Rescigno, T. N.
TI Dissociative electron attachment to the H2O molecule. I. Complex-valued
   potential-energy surfaces for the B-2(1), (2)A(1), and B-2(2) metastable
   states of the water anion
SO PHYSICAL REVIEW A
LA English
DT Article
ID GAUSSIAN-BASIS SETS; CROSS-SECTIONS; WAVE-FUNCTIONS; THRESHOLD
   PHOTODETACHMENT; VIBRATIONAL-EXCITATION; ANGULAR-DEPENDENCE; QUANTUM
   SCATTERING; VARIATIONAL METHOD; DIABATIC STATES; GEOMETRIC PHASE
AB We present the results of calculations defining global, three-dimensional representations of the complex-valued potential-energy surfaces of the B-2(1), (2)A(1), and B-2(2) metastable states of the water anion that underlie the physical process of dissociative electron attachment to water. The real part of the resonance energies is obtained from configuration-interaction calculations performed in a restricted Hilbert space, while the imaginary part of the energies (the widths) is derived from complex Kohn scattering calculations. A diabatization is performed on the (2)A(1) and B-2(2) surfaces, due to the presence of a conical intersection between them. We discuss the implications that the shapes of the constructed potential-energy surfaces will have on the nuclear dynamics of dissociative electron attachment to H2O.
C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   Univ Calif Davis, Dept Appl Sci & Chem, Davis, CA 95616 USA.
RP Haxton, DJ (reprint author), Univ Colorado, Dept Phys, Boulder, CO 80309 USA.
NR 60
TC 35
Z9 35
U1 0
U2 12
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 JAN
PY 2007
VL 75
IS 1
AR 012710
DI 10.1103/PhysRevA.75.012710
PG 25
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 131TY
UT WOS:000243894100085
ER

PT J
AU Hohr, C
   Peterson, ER
   Rohringer, N
   Rudati, J
   Arms, DA
   Dufresne, EM
   Dunford, RW
   Ederer, DL
   Kanter, EP
   Krassig, B
   Landahl, EC
   Santra, R
   Southworth, SH
   Young, L
AF Hohr, C.
   Peterson, E. R.
   Rohringer, N.
   Rudati, J.
   Arms, D. A.
   Dufresne, E. M.
   Dunford, R. W.
   Ederer, D. L.
   Kanter, E. P.
   Krassig, B.
   Landahl, E. C.
   Santra, R.
   Southworth, S. H.
   Young, L.
TI Alignment dynamics in a laser-produced plasma
SO PHYSICAL REVIEW A
LA English
DT Article
ID OPTICALLY IONIZED HELIUM; IONIZATION; EXCITATION; SCATTERING; SPECTRA;
   GASES
AB We observe the time evolution of ground-state ion alignment in a laser-produced plasma. Krypton ions produced in a strong, linearly polarized optical laser field (10(14)-10(15) W/cm(2)) are aligned along the field polarization axis. Using microfocused, tunable x rays from Argonne's Advanced Photon Source, we measure orbital alignment as a function of time. For plasma densities of the order of 10(14) cm(-3), the alignment decays within a few nanoseconds. A quantitative model explains the decay in terms of electron-ion collisions in the plasma. By applying an external magnetic field, we are able to suppress the disalignment and induce coherent spin precession of the Kr ions, thus providing an in situ monitor of magnetic fields in a plasma.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
RP Hohr, C (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Landahl, Eric/A-1742-2010; Rohringer, Nina/B-8030-2012; Santra,
   Robin/E-8332-2014; Rohringer, Nina/N-3238-2014
OI Santra, Robin/0000-0002-1442-9815; Rohringer, Nina/0000-0001-7905-3567
NR 31
TC 13
Z9 13
U1 0
U2 7
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 JAN
PY 2007
VL 75
IS 1
AR 011403
DI 10.1103/PhysRevA.75.011403
PG 4
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 131TY
UT WOS:000243894100008
ER

PT J
AU Knill, E
   Ortiz, G
   Somma, RD
AF Knill, Emanuel
   Ortiz, Gerardo
   Somma, Rolando D.
TI Optimal quantum measurements of expectation values of observables
SO PHYSICAL REVIEW A
LA English
DT Article
ID FOURIER-TRANSFORM; COMPUTATION; ALGORITHMS; COMPUTERS
AB Experimental characterizations of a quantum system involve the measurement of expectation values of observables for a preparable state parallel to psi > of the quantum system. Such expectation values can be measured by repeatedly preparing parallel to psi > and coupling the system to an apparatus. For this method, the precision of the measured value scales as 1/root N for N repetitions of the experiment. For the problem of estimating the parameter phi in an evolution e(-i phi H), it is possible to achieve precision 1/N [the quantum metrology limit; see Giovannetti , Phys. Rev. Lett. 96, 010401 (2006)] provided that sufficient information about H and its spectrum is available. We consider the more general problem of estimating expectations of operators A with minimal prior knowledge of A. We give explicit algorithms that approach precision 1/N given a bound on the eigenvalues of A or on their tail distribution. These algorithms are particularly useful for simulating quantum systems on quantum computers because they enable efficient measurement of observables and correlation functions. Our algorithms are based on a method for efficiently measuring the complex overlap of parallel to psi > and U parallel to psi >, where U is an implementable unitary operator. We explicitly consider the issue of confidence levels in measuring observables and overlaps and show that, as expected, confidence levels can be improved exponentially with linear overhead. We further show that the algorithms given here can typically be parallelized with minimal increase in resource usage.
C1 Natl Inst Stand & Technol, Math & Computat Sci Div, Boulder, CO 80305 USA.
   Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   Indiana Univ, Dept Phys, Bloomington, IN 47405 USA.
   Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA.
RP Knill, E (reprint author), Natl Inst Stand & Technol, Math & Computat Sci Div, Boulder, CO 80305 USA.
EM knill@boulder.nist.gov; g_ortiz@lanl.gov; somma@lanl.gov
NR 24
TC 24
Z9 24
U1 0
U2 2
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 JAN
PY 2007
VL 75
IS 1
AR 012328
DI 10.1103/PhysRevA.75.012328
PG 13
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 131TY
UT WOS:000243894100055
ER

PT J
AU Mihaila, B
   Gaudio, S
   Bedell, KS
   Blagoev, KB
   Timmermans, E
AF Mihaila, Bogdan
   Gaudio, Sergio
   Bedell, Kevin S.
   Blagoev, Krastan B.
   Timmermans, Eddy
TI Acoustic attenuation rate in the Fermi-Bose model with a finite-range
   fermion-fermion interaction
SO PHYSICAL REVIEW A
LA English
DT Article
ID EINSTEIN CONDENSATION; EXCITON MECHANISM; SUPERCONDUCTIVITY; GAS;
   SUPERFLUID; MOLECULES; MIXTURES; ATOMS
AB We study the acoustic attenuation rate in the Fermi-Bose model describing mixtures of bosonic and fermionic atom gases. We demonstrate the dramatic change of the acoustic attenuation rate as the fermionic component is evolved through the BEC to BCS crossover, in the context of a mean-field model applied to a finite-range fermion-fermion interaction at zero temperature, such as discussed previously by Parish [Phys. Rev. B 71, 064513 (2005)] and Mihaila [Phys. Rev. Lett. 95, 090402 (2005)]. The shape of the acoustic attenuation rate as a function of the boson energy represents a signature for superfluidity in the fermionic component.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
   Boston Coll, Dept Phys, Chestnut Hill, MA 02167 USA.
RP Mihaila, B (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA.
EM bmihaila@lanl.gov
RI Mihaila, Bogdan/D-8795-2013
OI Mihaila, Bogdan/0000-0002-1489-8814
NR 52
TC 0
Z9 0
U1 0
U2 3
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9926
EI 2469-9934
J9 PHYS REV A
JI Phys. Rev. A
PD JAN
PY 2007
VL 75
IS 1
AR 013603
DI 10.1103/PhysRevA.75.013603
PG 6
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 131TY
UT WOS:000243894100130
ER

PT J
AU Ward, SJ
   Shertzer, J
   Ovchinnikov, SY
   Macek, JH
AF Ward, S. J.
   Shertzer, J.
   Ovchinnikov, S. Yu.
   Macek, J. H.
TI Optimizing the paths for including the correction term to the
   hyperspherical hidden crossing method: Application to Ps formation in
   e(+)-Li collisions
SO PHYSICAL REVIEW A
LA English
DT Article
ID POSITRONIUM FORMATION; ENERGY; SCATTERING; LITHIUM; FRAGMENTATION;
   HYDROGEN; ATOMS
AB A correction term to the hyperspherical hidden crossing method (HHCM) was previously derived for large hyperradius R using the one-Sturmian theory. With the correction term, the HHCM potentials agree asymptotically with close-coupling channel potentials through order 1/R-2. Here, we present an optimal pair of paths in the complex R plane for the inclusion of the correction term. With this new pair of paths, the correction term can be treated in a consistent way for the two levels associated with a transition. Using the new paths, we apply the HHCM with the correction term to calculate s-, p-, d-, and f- partial wave cross sections for Ps formation in e(+)-Li collisions in the energy range 0 - 1.8 eV. The comparison of the total Ps formation cross section, with both an accurate hyperspherical close-coupling calculation and experimental measurements, shows that the HHCM with the correction term is a reliable method to describe collisions involving three charged particles. A systematic study of the Stuckelberg phase with respect to orbital angular momentum and momentum of the incident positron provides interesting insights into the scattering process.
C1 Univ N Texas, Dept Phys, Denton, TX 76203 USA.
   Coll Holy Cross, Dept Phys, Worcester, MA 01610 USA.
   Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Ward, SJ (reprint author), Univ N Texas, Dept Phys, Denton, TX 76203 USA.
RI Ovchinnikov, Serguei/C-4994-2014
NR 30
TC 5
Z9 5
U1 1
U2 3
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 JAN
PY 2007
VL 75
IS 1
AR 012713
DI 10.1103/PhysRevA.75.012713
PG 7
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 131TY
UT WOS:000243894100088
ER

PT J
AU Yoshida, S
   Reinhold, CO
   Burgdorfer, J
   Zhao, W
   Mestayer, JJ
   Lancaster, JC
   Dunning, FB
AF Yoshida, S.
   Reinhold, C. O.
   Burgdoerfer, J.
   Zhao, W.
   Mestayer, J. J.
   Lancaster, J. C.
   Dunning, F. B.
TI Dephasing of Stark wave packets induced by colored noise
SO PHYSICAL REVIEW A
LA English
DT Article
ID HALF-CYCLE PULSES; ATOMIC ELECTRON; RYDBERG ATOMS; QUANTUM; DYNAMICS;
   REVIVAL; FIELDS
AB The time evolution of Stark wave packets in Rydberg atoms under the influence of colored noise is analyzed. The Stark wave packets are generated by exposing K(350p) Rydberg atoms to an electric field step. Their time evolution is monitored using a half-cycle probe pulse that is applied after a variable time delay. The noise is generated by randomly modulating the amplitude of the static field. We show that noise results in an enhanced and irreversible dephasing of Stark quantum beats, as monitored by the damping of the beat amplitude. This source of decoherence is most effective when the characteristic frequency of the noise power spectrum matches the orbital frequency of the Rydberg electron. Noise driven resonant Delta n=1 transitions broaden the energy distribution thereby accelerating the dephasing.
C1 Tech Univ Vienna, Inst Theoret Phys, Vienna, Austria.
   Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
   Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA.
   Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA.
   Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA.
RP Yoshida, S (reprint author), Tech Univ Vienna, Inst Theoret Phys, Vienna, Austria.
OI Reinhold, Carlos/0000-0003-0100-4962
NR 32
TC 8
Z9 8
U1 1
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 JAN
PY 2007
VL 75
IS 1
AR 013414
DI 10.1103/PhysRevA.75.013414
PG 7
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 131TY
UT WOS:000243894100116
ER

PT J
AU Adroja, DT
   Park, JG
   Goremychkin, EA
   McEwen, KA
   Takeda, N
   Rainford, BD
   Knight, KS
   Taylor, JW
   Park, J
   Walker, HC
   Osborn, R
   Riseborough, PS
AF Adroja, D. T.
   Park, J. -G.
   Goremychkin, E. A.
   McEwen, K. A.
   Takeda, N.
   Rainford, B. D.
   Knight, K. S.
   Taylor, J. W.
   Park, Jeongmi
   Walker, H. C.
   Osborn, R.
   Riseborough, Peter S.
TI Observation of two spin gap energies in the filled skutterudite compound
   CeOs(4)Sb(12)
SO PHYSICAL REVIEW B
LA English
DT Article
ID INELASTIC NEUTRON-SCATTERING; HYBRIDIZATION GAP; MAGNETIC-FIELD;
   SEMICONDUCTOR; CE3BI4PT3; CERU4SB12; BEHAVIOR; MODEL; CE; TRANSITION
AB The optical conductivity of the Kondo insulator compound CeOs(4)Sb(12) reveals the formation of a 70 meV charge gap below 160 K. It also exhibits a weak shoulderlike structure at 30 meV, below 60 K. We have investigated CeOs(4)Sb(12) by inelastic neutron scattering techniques using incident neutron energies (E(i)) of 23 and 200 meV, at 5 and 176 K. Our measurements with E(i) = 200 meV show magnetic scattering centered near 50-60 meV and low-Q (similar to 3.8 angstrom(-1)) at 5 K, in addition to the continuum of magnetic scattering observed at 176 K. This clearly indicates the opening of a spin gap (or pseudogap ) of the order of 50 meV at 5 K in the strongly renormalized band near the Fermi energy. Furthermore, measurements with E(i) = 23 meV did not reveal any evidence of magnetic excitations below 20 meV, consistent with the scenario of a spin gap in CeOs(4)Sb(12). However, the estimated magnetic scattering deduced from the E(i) = 200 meV data reveals the presence of broad magnetic scattering between 25 and 80 meV centered near 27 meV, indicating a second energy scale with a gap energy of 27 meV. We interpret the 50 meV energy scale in terms of a direct gap, while the 27 meV energy scale corresponds to an indirect gap across the two hybridized bands. This gap energy of 27 meV is in good agreement with the so-called universal energy scale versus single ion Kondo temperature plot. We present the general features of spin gap systems such as CeOs(4)Sb(12) and CeRu(4)Sb(12), and discuss the role of crystal field excitations regarding the spin gap formation based on a theoretical model.
C1 Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
   Sungkyunkwan Univ, BK21 Phys Div, Suwon 440746, South Korea.
   Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea.
   Sungkyunkwan Univ, Inst Basic Sci, Suwon 440746, South Korea.
   Seoul Natl Univ, Ctr Strongly Correlated Mat Res, Seoul 151747, South Korea.
   Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
   UCL, Dept Phys & Astron, London WC1E 6BT, England.
   Niigata Univ, Fac Engn, Niigata 9502181, Japan.
   Univ Southampton, Dept Phys, Southampton SO17 1BJ, Hants, England.
   Temple Univ, Dept Phys, Philadelphia, PA 19122 USA.
RP Adroja, DT (reprint author), Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
RI Osborn, Raymond/E-8676-2011; Walker, Helen/C-4201-2011; Riseborough,
   Peter/D-4689-2011; Park, Je Geun/K-8571-2013
OI Osborn, Raymond/0000-0001-9565-3140; Walker, Helen/0000-0002-7859-5388; 
NR 49
TC 16
Z9 16
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD JAN
PY 2007
VL 75
IS 1
AR 014418
DI 10.1103/PhysRevB.75.014418
PG 8
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600082
ER

PT J
AU Alberi, K
   Wu, J
   Walukiewicz, W
   Yu, KM
   Dubon, OD
   Watkins, SP
   Wang, CX
   Liu, X
   Cho, YJ
   Furdyna, J
AF Alberi, K.
   Wu, J.
   Walukiewicz, W.
   Yu, K. M.
   Dubon, O. D.
   Watkins, S. P.
   Wang, C. X.
   Liu, X.
   Cho, Y. -J.
   Furdyna, J.
TI Valence-band anticrossing in mismatched III-V semiconductor alloys
SO PHYSICAL REVIEW B
LA English
DT Article
ID PHASE EPITAXIAL GAAS1-XSBX; TEMPERATURE-DEPENDENCE; GAP;
   PHOTOLUMINESCENCE; GROWTH; SPECTROSCOPY; LUMINESCENCE; LAYERS; BI
AB We show that the band gap bowing trends observed in III-V alloys containing dilute concentrations of Sb or Bi can be explained within the framework of the valence-band anticrossing model. Hybridization of the extended p-like states comprising the valence band of the host semiconductor with the close-lying localized p-like states of Sb or Bi leads to a nonlinear shift of the valence-band edge and a reduction of the band gap. The two alloys GaSbxAs1-x and GaBixAs1-x are explored in detail, and the results are extrapolated to additional systems.
C1 Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
   Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada.
   Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
RP Alberi, K (reprint author), Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RI Wu, Junqiao/G-7840-2011; Yu, Kin Man/J-1399-2012; Cho,
   YongJin/A-1143-2013
OI Wu, Junqiao/0000-0002-1498-0148; Yu, Kin Man/0000-0003-1350-9642; 
NR 29
TC 174
Z9 176
U1 3
U2 51
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 JAN
PY 2007
VL 75
IS 4
AR 045203
DI 10.1103/PhysRevB.75.045203
PG 6
WC Physics, Condensed Matter
SC Physics
GA 131UL
UT WOS:000243895600054
ER

PT J
AU Batista, CD
   Gubernatis, JE
   Yin, WG
AF Batista, C. D.
   Gubernatis, J. E.
   Yin, Wei-Guo
TI Electronic mechanism for the coexistence of ferroelectricity and
   ferromagnetism
SO PHYSICAL REVIEW B
LA English
DT Article
ID FALICOV-KIMBALL MODEL; POLARIZATION
AB We study the strong-coupling limit of a two-band Hubbard Hamiltonian that includes an interorbital on-site repulsive interaction U-ab. When the two bands have opposite parity and are quarter filled, we prove that the ground state is simultaneously ferromagnetic and ferroelectric for intraorbital Coulomb interactions U-aa, U-bb >> U-ab. We also show that this coexistence leads to an enormous magnetoelectric effect.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   Brookhaven Natl Lab, Condensed Matter Phys & Matter Sci Dept, Upton, NY 11973 USA.
RP Batista, CD (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA.
RI Batista, Cristian/J-8008-2016; Yin, Weiguo/A-9671-2014
OI Yin, Weiguo/0000-0002-4965-5329
NR 23
TC 5
Z9 6
U1 2
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 JAN
PY 2007
VL 75
IS 1
AR 014423
DI 10.1103/PhysRevB.75.014423
PG 5
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600087
ER

PT J
AU Booth, CH
   Christianson, AD
   Lawrence, JM
   Pham, LD
   Lashley, JC
   Drymiotis, FR
AF Booth, C. H.
   Christianson, A. D.
   Lawrence, J. M.
   Pham, L. D.
   Lashley, J. C.
   Drymiotis, F. R.
TI Ytterbium divalency and lattice disorder in near-zero thermal expansion
   YbGaGe
SO PHYSICAL REVIEW B
LA English
DT Article
ID SYSTEM
AB While near-zero thermal expansion (NZTE) in YbGaGe is sensitive to stoichiometry and defect concentration, the NZTE mechanism remains elusive. We present x-ray absorption spectra that show unequivocally that Yb is nearly divalent in YbGaGe and the valence does not change with temperature or with nominally 1% B or 5% C impurities, ruling out a valence-fluctuation mechanism. Moreover, substantial changes occur in the local structure around Yb with B and C inclusion. Together with inelastic neutron scattering measurements, these data indicate a strong tendency for the lattice to disorder, providing a possible explanation for NZTE in YbGaGe.
C1 Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
   Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
   Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
   Los Alamos Natl Lab, Div Mat Sci, Los Alamos, NM 87545 USA.
   Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA.
RP Booth, CH (reprint author), Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
EM chbooth@lbl.gov
RI Booth, Corwin/A-7877-2008; christianson, andrew/A-3277-2016
OI christianson, andrew/0000-0003-3369-5884
NR 12
TC 6
Z9 6
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 JAN
PY 2007
VL 75
IS 1
AR 012301
DI 10.1103/PhysRevB.75.012301
PG 4
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600009
ER

PT J
AU Boukhvalov, DW
   Al-Saqer, M
   Kurmaev, EZ
   Moewes, A
   Galakhov, VR
   Finkelstein, LD
   Chiuzbaian, S
   Neumann, M
   Dobrovitski, VV
   Katsnelson, MI
   Lichtenstein, AI
   Harmon, BN
   Endo, K
   North, JM
   Dalal, NS
AF Boukhvalov, D. W.
   Al-Saqer, M.
   Kurmaev, E. Z.
   Moewes, A.
   Galakhov, V. R.
   Finkelstein, L. D.
   Chiuzbaian, S.
   Neumann, M.
   Dobrovitski, V. V.
   Katsnelson, M. I.
   Lichtenstein, A. I.
   Harmon, B. N.
   Endo, K.
   North, J. M.
   Dalal, N. S.
TI Electronic structure of a Mn-12 molecular magnet: Theory and experiment
SO PHYSICAL REVIEW B
LA English
DT Article
ID DENSITY-FUNCTIONAL CALCULATION; RAY PHOTOEMISSION SPECTRA;
   TRANSITION-METAL OXIDES; HIGH-SPIN MOLECULES; CORRELATED SYSTEMS;
   BAND-STRUCTURE; MAGNETIZATION; EMISSION; NANOMAGNETS; FE-8
AB We used site-selective and element-specific resonant inelastic x-ray scattering (RIXS) to study the electronic structure and the electron interaction effects in the molecular magnet [Mn12O12(CH3COO)(16)(H2O)(4)]center dot 2CH(3)COOH center dot 4H(2)O, and compared the experimental data with the results of local spin density approximation +U electron structure calculations which include the on-site Coulomb interactions. We found a good agreement between theory and experiment for the Coulomb repulsion parameter U = 4 eV. In particular, the p-d band separation of 1.8 eV has been found from the RIXS spectra, which is in accordance with the calculations. Similarly, the positions of the peaks in the XPS spectra agree with the calculated densities of p and d states. Using the results of the electronic structure calculations, we determined the intramolecular exchange parameters, and used them for diagonalization of the Mn-12 spin Hamiltonian. The calculated exchanges gave the correct ground state with the total spin S = 10.
C1 Russian Acad Sci, Inst Phys Met, Ekaterinburg 620219, Russia.
   Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
   Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK S7N 5E2, Canada.
   Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
   Univ Osnabruck, Fachbereich Phys, D-49069 Osnabruck, Germany.
   Uppsala Univ, Dept Phys, SE-75121 Uppsala, Sweden.
   Univ Nijmegen, NL-6525 ED Nijmegen, Netherlands.
   Kanazawa Univ, Fac Sci, Dept Chem, Kanazawa, Ishikawa 9201192, Japan.
RP Boukhvalov, DW (reprint author), Russian Acad Sci, Inst Phys Met, Ekaterinburg 620219, Russia.
RI Katsnelson, Mikhail/D-4359-2012; Kurmaev, Ernst/J-4254-2013; Nechkina,
   Larisa/J-5974-2013; Galakhov, Vadim/J-6030-2013; Lichtenstein,
   Alexander/K-8730-2012
OI Kurmaev, Ernst/0000-0003-4625-4930; Nechkina,
   Larisa/0000-0002-6268-7958; Galakhov, Vadim/0000-0002-1642-7362;
   Lichtenstein, Alexander/0000-0003-0152-7122
NR 54
TC 35
Z9 35
U1 0
U2 11
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 JAN
PY 2007
VL 75
IS 1
AR 014419
DI 10.1103/PhysRevB.75.014419
PG 9
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600083
ER

PT J
AU Bracht, H
   Silvestri, HH
   Sharp, ID
   Haller, EE
AF Bracht, H.
   Silvestri, H. H.
   Sharp, I. D.
   Haller, E. E.
TI Self- and foreign-atom diffusion in semiconductor isotope
   heterostructures. II. Experimental results for silicon
SO PHYSICAL REVIEW B
LA English
DT Article
ID VACANCY-MEDIATED DIFFUSION; INTRINSIC POINT-DEFECTS; PHOSPHORUS
   DIFFUSION; BORON-DIFFUSION; EXTRINSIC CONDITIONS; AB-INITIO;
   ISOCONCENTRATION DIFFUSION; THERMAL NITRIDATION; ARSENIC DIFFUSION;
   DOPANT DIFFUSION
AB We report the diffusion of boron, arsenic, and phosphorus in silicon isotope multilayer structures at temperatures between 850 degrees C and 1100 degrees C. The diffusion of all dopants and self-atoms at a given temperature is modeled with the same setting of all native-point-defect-related parameters. The evaluation of the relative contributions of charged native-point defects to self-diffusion enables us to determine the defect energy levels introduced by the native-point defects in the Si band gap. Making allowance for the fact that the band gap and the energy levels change with temperature, an energy-level diagram of the native-point defects is obtained that shows a reversed level ordering for the donor levels of the self-interstitials. In accord with the general state of knowledge, the diffusion of boron is mainly mediated by self-interstitials whereas the properties of both vacancies and self-interstitials are important to model arsenic and phosphorus diffusion. The simultaneous diffusion of phosphorus and silicon requires the existence of a singly positively charged interstitial phosphorus. It is the diffusion of this defect that strongly affects the shape of the phosphorus diffusion tail and not entirely the supersaturation of self-interstitials argued so far. Taking into account the mechanisms of dopant diffusion and the properties of native-point defects determined from the simultaneous diffusion experiments, let us describe accurately dopant profiles given in the literature. Altogether, this work provides overall consistent data for modeling dopant and self-diffusion in Si for various experimental conditions. A comparison of experimentally and theoretically determined activation enthalpies of self- and dopant diffusion shows excellent agreement for self-interstitial-mediated diffusion but significant differences for vacancy-mediated diffusion in Si. This disagreement either reflects the deficiency of first-principle calculations to accurately predict the energy band gap of Si or points to a still-remaining lack in our understanding of diffusion in Si.
C1 Univ Munster, Inst Mat Phys, D-48149 Munster, Germany.
   Univ Calif Berkeley, Berkeley, CA 94720 USA.
   Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Bracht, H (reprint author), Univ Munster, Inst Mat Phys, D-48149 Munster, Germany.
EM bracht@uni-muenster.de
RI Sharp, Ian/I-6163-2015
OI Sharp, Ian/0000-0001-5238-7487
NR 70
TC 81
Z9 81
U1 1
U2 21
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD JAN
PY 2007
VL 75
IS 3
AR 035211
DI 10.1103/PhysRevB.75.035211
PG 21
WC Physics, Condensed Matter
SC Physics
GA 131UJ
UT WOS:000243895400078
ER

PT J
AU Busser, CA
   Martins, GB
AF Busser, C. A.
   Martins, G. B.
TI Numerical results indicate a half-filling SU(4) Kondo state in carbon
   nanotubes
SO PHYSICAL REVIEW B
LA English
DT Article
ID DOUBLE-QUANTUM DOTS; SPIN; SYSTEMS
AB Numerical calculations simulate transport experiments in carbon nanotube quantum dots [P. Jarillo-Herrero , Nature 434, 484 (2005)], where a strongly enhanced Kondo temperature T-K approximate to 8.0 K was associated with the SU(4) symmetry of the Hamiltonian at quarter-filling for an orbitally double-degenerate single-occupied electronic shell. Our results clearly suggest that the Kondo conductance measured for an adjacent shell with T-K approximate to 16.0 K, interpreted as a singlet-triplet Kondo effect, can be associated instead to an SU(4) Kondo effect at half-filling. Besides presenting spin-charge Kondo screening similar to the quarter-filling SU(4), the half-filling SU(4) has been recently associated to very rich physical behavior, including a non-Fermi-liquid state [M. R. Galpin , Phys. Rev. Lett. 94, 186406 (2005)].
C1 Oakland Univ, Dept Phys, Rochester, MI 48309 USA.
   Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA.
   Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RP Martins, GB (reprint author), Oakland Univ, Dept Phys, Rochester, MI 48309 USA.
EM martins@oakland.edu
RI Busser, Carlos/K-1017-2014; Martins, George/C-9756-2012
OI Busser, Carlos/0000-0002-0353-7490; Martins, George/0000-0001-7846-708X
NR 35
TC 29
Z9 29
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 JAN
PY 2007
VL 75
IS 4
AR 045406
DI 10.1103/PhysRevB.75.045406
PG 7
WC Physics, Condensed Matter
SC Physics
GA 131UL
UT WOS:000243895600115
ER

PT J
AU Chaudhury, RP
   Yen, F
   dela Cruz, CR
   Lorenz, B
   Wang, YQ
   Sun, YY
   Chu, CW
AF Chaudhury, R. P.
   Yen, F.
   dela Cruz, C. R.
   Lorenz, B.
   Wang, Y. Q.
   Sun, Y. Y.
   Chu, C. W.
TI Pressure-temperature phase diagram of multiferroic Ni3V2O8
SO PHYSICAL REVIEW B
LA English
DT Article
AB The pressure-temperature phase diagram of multiferroic Ni3V2O8 is investigated for hydrostatic pressures up to 2 GPa. The stability range of the ferroelectric phase associated with the incommensurate helical spin order is reduced by pressure and ferroelectricity is completely suppressed at the critical pressure of 1.64 GPa at 6.2 K. Thermal expansion measurements at ambient pressure show strong steplike anomalies of the lattice parameters associated with the lock-in transition into the commensurate paraelectric phase. The expansion anomalies are highly anisotropic; the related volume change is consistent with the high-pressure phase diagram.
C1 Univ Houston, TCSUH, Houston, TX 77204 USA.
   Univ Houston, Dept Phys, Houston, TX 77204 USA.
   Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   Hong Kong Univ Sci & Technol, Hong Kong, Hong Kong, Peoples R China.
RP Chaudhury, RP (reprint author), Univ Houston, TCSUH, Houston, TX 77204 USA.
RI dela Cruz, Clarina/C-2747-2013; Yen, Fei/C-8713-2015
OI dela Cruz, Clarina/0000-0003-4233-2145; Yen, Fei/0000-0003-2295-3040
NR 14
TC 33
Z9 34
U1 1
U2 8
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 JAN
PY 2007
VL 75
IS 1
AR 012407
DI 10.1103/PhysRevB.75.012407
PG 4
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600018
ER

PT J
AU Colla, EV
   Weissman, MB
   Gehring, PM
   Xu, GY
   Luo, HS
   Gemeiner, P
   Dkhil, B
AF Colla, Eugene V.
   Weissman, M. B.
   Gehring, P. M.
   Xu, Guangyong
   Luo, Haosu
   Gemeiner, P.
   Dkhil, Brahim
TI Nonferroelectric aging in the relaxor PbMg1/3Nb2/3O3
SO PHYSICAL REVIEW B
LA English
DT Article
ID LEAD MAGNESIUM NIOBATE; PHASE-TRANSITIONS; SPIN-GLASS;
   DIELECTRIC-PROPERTIES; FERROELECTRIC PHASE; ELECTRIC-FIELD;
   MAGNONIOBATE; TRANSFORMATIONS; CERAMICS; STATES
AB Three samples of PbMg1/3Nb2/3O3 found to show no abrupt electric-field-driven phase transition to a polarized state are compared to a sample which has such a transition and whose dielectric properties resemble those of other samples previously reported to show that transition. The samples without the field-driven transition have lower kinetic freezing temperatures and lower dielectric constants, and one shows a new transitionlike susceptibility jump at about 180 K on cooling in zero field. Nonetheless, in each sample the distinctive spin-glasslike aging of the dielectric susceptibility follows the same aging pattern quantitatively. These results support pictures in which the glassy aging comes from different degrees of freedom than does most of the dielectric response, which is dominated by the orientations of ferroelectriclike polar nanoregions.
C1 Univ Illinois, Dept Phys, Urbana, IL 61801 USA.
   Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
   Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
   Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 201800, Peoples R China.
   Ecole Cent Paris, CNRS, UMR 8580, Lab Struct Proprietes & Modelisat Solides, F-92295 Chatenay Malabry, France.
RP Colla, EV (reprint author), Univ Illinois, Dept Phys, 1110 W Green St, Urbana, IL 61801 USA.
RI Xu, Guangyong/A-8707-2010; Dkhil, Brahim/O-8939-2014; 
OI Xu, Guangyong/0000-0003-1441-8275; Dkhil, Brahim/0000-0001-6155-059X;
   Gehring, Peter/0000-0002-9236-2046
NR 33
TC 7
Z9 7
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD JAN
PY 2007
VL 75
IS 2
AR 024103
DI 10.1103/PhysRevB.75.024103
PG 5
WC Physics, Condensed Matter
SC Physics
GA 131UG
UT WOS:000243895100022
ER

PT J
AU Danzenbacher, S
   Kucherenko, Y
   Vyalikh, DV
   Holder, M
   Laubschat, C
   Yaresko, AN
   Krellner, C
   Hossain, Z
   Geibel, C
   Zhou, XJ
   Yang, WL
   Mannella, N
   Hussain, Z
   Shen, ZX
   Shi, M
   Patthey, L
   Molodtsov, SL
AF Danzenbaecher, S.
   Kucherenko, Yu.
   Vyalikh, D. V.
   Holder, M.
   Laubschat, C.
   Yaresko, A. N.
   Krellner, C.
   Hossain, Z.
   Geibel, C.
   Zhou, X. J.
   Yang, W. L.
   Mannella, N.
   Hussain, Z.
   Shen, Z. -X.
   Shi, M.
   Patthey, L.
   Molodtsov, S. L.
TI Momentum dependence of 4f hybridization in heavy-fermion compounds:
   Angle-resolved photoemission study of YbIr2Si2 and YbRh2Si2
SO PHYSICAL REVIEW B
LA English
DT Article
ID KONDO INSULATOR YBB12; SINGLE IMPURITY MODEL; RARE-EARTH-METALS; CE
   COMPOUNDS; TEMPERATURE-DEPENDENCE; ELECTRONIC-STRUCTURE; SPECTROSCOPY;
   SPECTRA; YBINCU4; SYSTEMS
AB Heavy-fermion compounds YbIr2Si2 and YbRh2Si2 were studied by means of angle-resolved photoemission (PE). The splittings and dispersions of the 4f(13) bulk and surface PE signals in the region of the expected energy crossings of the 4f final states and the valence bands in the Brillouin zone are observed. The experimental results are explained in terms of a simplified periodic Anderson model by a momentum dependence of the electron hopping matrix element between the 4f and valence-band states.
C1 Tech Univ Dresden, Inst Festkorperphys, D-01062 Dresden, Germany.
   Natl Acad Sci Ukraine, Inst Met Phys, UA-03142 Kiev, Ukraine.
   Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany.
   Max Planck Inst Chem Phys Stoffe, D-01187 Dresden, Germany.
   Indian Inst Technol, Dept Phys, Kanpur 208016, Uttar Pradesh, India.
   Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
   Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA.
   Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland.
RP Danzenbacher, S (reprint author), Tech Univ Dresden, Inst Festkorperphys, D-01062 Dresden, Germany.
RI Krellner, Cornelius/A-5389-2009; Vyalikh, Denis/H-8044-2013; Yang,
   Wanli/D-7183-2011
OI Krellner, Cornelius/0000-0002-0671-7729; Vyalikh,
   Denis/0000-0001-9053-7511; Yang, Wanli/0000-0003-0666-8063
NR 60
TC 32
Z9 32
U1 3
U2 18
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 JAN
PY 2007
VL 75
IS 4
AR 045109
DI 10.1103/PhysRevB.75.045109
PG 11
WC Physics, Condensed Matter
SC Physics
GA 131UL
UT WOS:000243895600026
ER

PT J
AU Deb, A
   Itou, M
   Tsurkan, V
   Sakurai, Y
AF Deb, Aniruddha
   Itou, M.
   Tsurkan, V.
   Sakurai, Y.
TI Effect of substitution of Cl and Br for Se in the ferromagnetic spinel
   CuCr2Se4: A magnetic Compton profile study
SO PHYSICAL REVIEW B
LA English
DT Article
ID SCATTERING; ELECTRONS
AB The spin-polarized electron momentum distribution in the Cr-based chalcogenide spinels CuCr2Se4-xClx (x=0.0 and 0.4) and CuCr2Se4-xBrx (x=0.78) has been measured using magnetic Compton scattering technique at T=10 K. Magnetic Compton profiles have been compared with the results from electronic structure calculations performed using the full potential linearized augmented plane-wave method (FPLAPW). The theoretical analysis includes a decomposition of the various orbitals and atomic contributions. For substitution of Cl and Br for Se in the lattice it is observed that the Cr spin moment increases by similar to 0.2 mu(B) per formula unit (FU-1) for Cl substitution (x similar to 0.4) and 0.7 mu(B) FU-1 for Br substitution (x similar to 0.78). The Cr 3d spin moment in these spinels are observed to be antiparallel to those of tetrahedrally coordinated Cu and Se spin moments. The Cu spin moments arise mainly from the 3d states, while the increase in the Cr 3d moment due to the substitution for Se (with Cl and Br) in the structure of the parent compound is compensated by a decrease of the Cu spin moment.
C1 SSRL, Menlo Pk, CA 94025 USA.
   JASRI, Sayo, Hyogo 6795198, Japan.
   Moldavian Acad Sci, Inst Appl Phys, Kishinev 2028, MD, Moldova.
RP Deb, A (reprint author), SSRL, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
EM adeb@slac.stanford.edu
RI Deb, Aniruddha/H-7529-2016
OI Deb, Aniruddha/0000-0002-0331-9709
NR 19
TC 4
Z9 4
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 JAN
PY 2007
VL 75
IS 2
AR 024413
DI 10.1103/PhysRevB.75.024413
PG 6
WC Physics, Condensed Matter
SC Physics
GA 131UG
UT WOS:000243895100063
ER

PT J
AU Ehlers, G
   Ritter, C
   Stewart, JR
   Hillier, AD
   Maletta, H
AF Ehlers, G.
   Ritter, C.
   Stewart, J. R.
   Hillier, A. D.
   Maletta, H.
TI Phase transition of geometrically frustrated TbNiAl in a magnetic field
SO PHYSICAL REVIEW B
LA English
DT Article
ID ANOMALOUS TRANSITION; FERROMAGNETIC ORDER; DIFFRACTION; SYSTEM
AB The phase transitions of the geometrically frustrated antiferromagnet TbNiAl in a magnetic field are studied by means of neutron powder diffraction, ac susceptibility, and muon spin relaxation (mu SR) measurements. Neutron powder diffraction reveals that, in addition to antiferromagnetic order, ferromagnetic order is induced in a field as low as B similar to 0.02 T. At higher fields, ferromagnetic and antiferromagnetic order coexist in different domains in the sample, and the domain balance depends on both magnetic field and temperature. Antiferromagnetic Bragg reflections are observed below a Neel temperature of T-N=47 K which is independent of the field. Ferromagnetic Bragg peaks are observed below a field-dependent Curie temperature which increases from T-C=52 K at B=0.2 T to T-C=70 K at B=5 T. Both phase transitions are concurrently observed in ac susceptibility and mu SR measurements.
C1 Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA.
   Inst Laue Langevin, F-38042 Grenoble, France.
   Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
   Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany.
RP Ehlers, G (reprint author), Oak Ridge Natl Lab, Spallat Neutron Source, Bldg 8600, Oak Ridge, TN 37831 USA.
RI Stewart, Ross/C-4194-2008; D20, Diffractometer/O-3123-2013; Hillier,
   Adrian/A-9331-2015; Ehlers, Georg/B-5412-2008
OI Stewart, Ross/0000-0003-0053-0178; D20,
   Diffractometer/0000-0002-1572-1367; Hillier, Adrian/0000-0002-2391-8581;
   Ehlers, Georg/0000-0003-3513-508X
NR 23
TC 8
Z9 8
U1 1
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD JAN
PY 2007
VL 75
IS 2
AR 024420
DI 10.1103/PhysRevB.75.024420
PG 5
WC Physics, Condensed Matter
SC Physics
GA 131UG
UT WOS:000243895100070
ER

PT J
AU Hinks, DG
   Rosenmann, D
   Claus, H
   Bailey, MS
   Jorgensen, JD
AF Hinks, D. G.
   Rosenmann, D.
   Claus, H.
   Bailey, M. S.
   Jorgensen, J. D.
TI Large Ca isotope effect in the CaC6 superconductor
SO PHYSICAL REVIEW B
LA English
DT Article
ID GRAPHITE-INTERCALATION COMPOUNDS; COMPOUND C8K; SUSCEPTIBILITY;
   TEMPERATURE
AB We have measured the Ca isotope effect coefficient, alpha(Ca), in the newly discovered superconductor CaC6 and find a value of 0.53(2). This result shows that the superconductivity is dominated by coupling of the electrons by Ca phonon modes. The C phonons contribute very little, assuming that this material is a conventional electron-phonon coupled superconductor. Thus, in contrast to another layered material MgB2, where high-energy phonons in the B layers are responsible for the superconductivity, in layered CaC6 the phonons responsible for superconductivity are primarily low-energy modes of the intercalated Ca.
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Hinks, DG (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 27
TC 36
Z9 36
U1 1
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 JAN
PY 2007
VL 75
IS 1
AR 014509
DI 10.1103/PhysRevB.75.014509
PG 6
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600116
ER

PT J
AU Homes, CC
   Tranquada, JM
   Buttrey, DJ
AF Homes, C. C.
   Tranquada, J. M.
   Buttrey, D. J.
TI Stripe order and vibrational properties of La2NiO4+delta for delta=2/15:
   Measurements and ab initio calculations
SO PHYSICAL REVIEW B
LA English
DT Article
ID C-AXIS PHONONS; STRUCTURAL PHASE-TRANSITION; PLANE OPTICAL CONDUCTIVITY;
   SINGLE-CRYSTALS; HIGH-T(C) SUPERCONDUCTORS; INFRARED RESPONSE; CHARGE;
   LA2-XSRXNIO4; DEPENDENCE; OXYGEN
AB The optical properties of the static charge- and stripe-ordered material La2NiO4+delta for delta=2/15 have been measured over a wide frequency and temperature range for light polarized within the a-b planes and along the c axis. Below the charge-ordering temperature, T-co similar or equal to 319 K, a charge gap opens and the electronic background, upon which four strong infrared-active phonons are superimposed, drops towards zero. As the temperature decreases, many new spectral features are observed in response to the ordering of interstitial oxygen as well as the formation of a superlattice due to the charge order in the NiO2 planes. In particular, the prominent mode at 354 cm(-1) splits into three components; while the frequencies do not shift below the magnetic-ordering transition at T-m=110 K, there is a transfer of oscillator strength in response to the change in registry of the charge stripes with respect to the underlying lattice. Ab initio calculations have been performed using density-functional theory, and the phonon dispersion curves were obtained using the direct method. Likely assignments of the new modes activated by stripe order are discussed. In some crystals, two antiresonances are observed in the conductivity for T similar or equal to T-co, which change to a resonant character for T less than or similar to T-m; these modes are shown to be due to longitudinal optic c-axis modes which appear as a result of surface misorientation.
C1 Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
RP Homes, CC (reprint author), Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
EM homes@bnl.gov
RI Tranquada, John/A-9832-2009
OI Tranquada, John/0000-0003-4984-8857
NR 66
TC 10
Z9 10
U1 1
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 JAN
PY 2007
VL 75
IS 4
AR 045128
DI 10.1103/PhysRevB.75.045128
PG 11
WC Physics, Condensed Matter
SC Physics
GA 131UL
UT WOS:000243895600045
ER

PT J
AU Honerkamp, C
   Fu, HC
   Lee, DH
AF Honerkamp, Carsten
   Fu, Henry C.
   Lee, Dung-Hai
TI Phonons and d-wave pairing in the two-dimensional Hubbard model
SO PHYSICAL REVIEW B
LA English
DT Article
ID RENORMALIZATION-GROUP APPROACH; SQUARE LATTICE; SUPERCONDUCTIVITY;
   FLUCTUATION; ELECTRONS
AB We analyze the influence of phonons on the d(x)(2)-y(2)-pairing instability in the Hubbard model on the two-dimensional square lattice at weak to moderate interaction U, using a functional renormalization group scheme with frequency-dependent interaction vertices. As measured by the pairing scale, the B-1g buckling mode enhances the pairing, while other phonon modes decrease the pairing. When various phonon modes are included together, the net effect on the scale is small. However, in situations where d-wave superconductivity and other tendencies, e.g., antiferromagnetism, are closely competing, the combined effect of different phonons may be able to tip the balance towards pairing.
C1 Univ Wurzburg, D-97074 Wurzburg, Germany.
   Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany.
   Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
   Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Honerkamp, C (reprint author), Univ Wurzburg, D-97074 Wurzburg, Germany.
RI Fu, Henry/F-2861-2014
NR 43
TC 28
Z9 28
U1 0
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 JAN
PY 2007
VL 75
IS 1
AR 014503
DI 10.1103/PhysRevB.75.014503
PG 5
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600110
ER

PT J
AU Hucker, M
   von Zimmermann, M
   Gu, GD
AF Huecker, M.
   von Zimmermann, M.
   Gu, G. D.
TI Robust charge stripe order under high electric fields in
   Nd1.67Sr0.33NiO4
SO PHYSICAL REVIEW B
LA English
DT Article
ID HIGH-TEMPERATURE SUPERCONDUCTORS; DIELECTRIC-BREAKDOWN; DENSITY-WAVE;
   X-RAY; PHASE; INSTABILITIES; POTENTIALS
AB The influence of high electric fields on the charge stripe order in Nd1.67Sr0.33NiO4 was studied by means of simultaneous hard x-ray diffraction and electrical transport experiments. Direct measurements of the charge stripe satellite peaks in zero and high electric fields provide no evidence for a deformation or a sliding of the stripe lattice, which contradicts previous indications from nonlinear conductance effects. By using the order parameter of a structural phase transition for instant sample temperature measurements, nonlinear transport effects can be attributed to resistive heating. Implications for the pinning of stripes in the nickelates are discussed.
C1 Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
   DESY, HASYLAB, D-22603 Hamburg, Germany.
RP Hucker, M (reprint author), Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
RI Gu, Genda/D-5410-2013
OI Gu, Genda/0000-0002-9886-3255
NR 32
TC 10
Z9 10
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 JAN
PY 2007
VL 75
IS 4
AR 041103
DI 10.1103/PhysRevB.75.041103
PG 4
WC Physics, Condensed Matter
SC Physics
GA 131UL
UT WOS:000243895600003
ER

PT J
AU Kelekar, R
   Ohldag, H
   Clemens, BM
AF Kelekar, R.
   Ohldag, H.
   Clemens, B. M.
TI X-ray magnetic circular dichroism of Heusler alloy Co2Cr1-xFexAl
   epitaxial thin films
SO PHYSICAL REVIEW B
LA English
DT Article
ID SPIN POLARIZATION; COMPOUND CO2CR0.6FE0.4AL; ORBITAL MAGNETISM;
   POINT-CONTACT; SPECTROSCOPY; JUNCTIONS; METAL; FE; CO; MAGNETORESISTANCE
AB We apply the technique of x-ray magnetic circular dichroism in total electron yield mode to study the magnitudes of the magnetic moments of Cr, Fe, and Co in Heusler alloy Co2Cr1-xFexAl epitaxial thin films, predicted to be half metallic for small values of x. We extract the moments by positing that the constant of proportionality between the resonant absorption intensity per atom and the number of d holes is the same for Cr, Fe, and Co; this modified sum rule analysis removes the need to estimate values for the number of d holes, the degree of x-ray circular polarization, and the angle between the x-ray wave vector and the applied magnetic field. We find the orbital moments of Fe and Co to have small values close to those of pure samples. Across samples of different compositions and processing temperatures the Co moment shows the largest variations and hence appears to be a good indicator of the atomic environment. In Co2Cr0.6Fe0.4Al, we find evidence for an annealing-induced reduction in magnetization, and find the magnetization to remain constant for thicknesses down to 50 angstrom. In all of the samples containing Cr we find that the Cr spin moment is on average ferromagnetically aligned with Fe and Co but is similar to(0.1-0.3) mu(B), far lower than predicted. However, the line shape of the Cr dichroism signal resembles that predicted by electronic structure calculations, indicating that only a fraction of the Cr atoms may be magnetic.
C1 Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA.
   Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
   Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA.
RP Kelekar, R (reprint author), Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA.
EM rkelekar@stanford.edu
RI Ohldag, Hendrik/F-1009-2014
NR 39
TC 4
Z9 4
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 JAN
PY 2007
VL 75
IS 1
AR 014429
DI 10.1103/PhysRevB.75.014429
PG 8
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600093
ER

PT J
AU Knickelbein, MB
AF Knickelbein, Mark B.
TI Magnetic moments of small bimetallic clusters: ConMnm
SO PHYSICAL REVIEW B
LA English
DT Article
ID CO-MN ALLOYS; NICKEL CLUSTERS; IONIZATION-POTENTIALS; COBALT-MANGANESE;
   MOLECULAR-BEAM; TRANSITION-METALS; BETA-MN; PHOTOIONIZATION;
   ANTIFERROMAGNETISM; TEMPERATURE
AB The magnetic properties of cobalt-manganese binary clusters ConMnm (n+m=11-29) were investigated using a Stern-Gerlach molecular beam deflection technique. One-sided beam deflections, signifying superparamagnetic behavior, were observed at temperatures of 90 K and higher. In most cases, the magnetic moments of ConMnm clusters were similar to those of Co-n clusters containing the same total number of atoms. The magnitude of the magnetic moments measured are significantly larger than would be expected based on the susceptibilities of the corresponding bulk Co1-xMnx alloys.
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.
NR 53
TC 39
Z9 39
U1 1
U2 10
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD JAN
PY 2007
VL 75
IS 1
AR 014401
DI 10.1103/PhysRevB.75.014401
PG 6
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600065
ER

PT J
AU Kopnin, NB
   Mel'nikov, AS
   Pozdnyakova, VI
   Ryzhov, DA
   Shereshevskii, IA
   Vinokur, VM
AF Kopnin, N. B.
   Mel'nikov, A. S.
   Pozdnyakova, V. I.
   Ryzhov, D. A.
   Shereshevskii, I. A.
   Vinokur, V. M.
TI Enhanced vortex heat conductance in mesoscopic superconductors
SO PHYSICAL REVIEW B
LA English
DT Article
ID THERMAL CONDUCTIVITY; QUANTUM; STATES; ABSORPTION
AB Electronic heat transport along the flux lines in a long ballistic mesoscopic superconductor cylinder with a radius of the order of several coherence lengths is investigated theoretically using both semiclassical approach and the full quantum-mechanical analysis of the Bogoliubov-de Gennes equations. The semiclassical approach leads to the heat transport theory which employs the idea that heat is carried by the quasiparticle modes propagating along the vortex core in a way similar to the Landauer transport theory for mesoscopic conductors. We show that the vortex heat conductance in a mesoscopic sample is strongly enhanced as compared to its value for a bulk superconductor; it grows as the cylinder radius decreases. This unusual behavior results from a strongly increased number of transverse modes due to giant mesoscopic oscillations of energy levels, which originate from the interplay between the Andreev reflection at the vortex core boundary and the normal reflection at the sample edge. We derive the exact quantum-mechanical expression for the heat conductance and solve the Bogoliubov-de Gennes equations numerically. The results of numerical computations generalize the qualitative Landauer-type picture by taking into account the partial reflections of excitations. We analyze the effect of surface imperfections on the spectrum of core excitations. We show that the giant oscillations of core levels and thus the essential features of the heat transport characteristic to ideal mesoscopic samples hold for a broad class of surface imperfections as well.
C1 Helsinki Univ Technol, Low Temp Lab, FIN-02015 Helsinki, Finland.
   RAS, LD Landau Theoret Phys Inst, Moscow 117940, Russia.
   RAS, Inst Phys Microstruct, Nizhnii Novgorod 603950, Russia.
   Argonne Natl Lab, Argonne, IL 60439 USA.
RP Kopnin, NB (reprint author), Helsinki Univ Technol, Low Temp Lab, POB 2200, FIN-02015 Helsinki, Finland.
RI Mel'nikov, Alexander/E-8099-2017
OI Mel'nikov, Alexander/0000-0002-4241-467X
NR 27
TC 11
Z9 11
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 JAN
PY 2007
VL 75
IS 2
AR 024514
DI 10.1103/PhysRevB.75.024514
PG 11
WC Physics, Condensed Matter
SC Physics
GA 131UG
UT WOS:000243895100097
ER

PT J
AU Ku, LC
   Trugman, SA
AF Ku, Li-Chung
   Trugman, S. A.
TI Quantum dynamics of polaron formation
SO PHYSICAL REVIEW B
LA English
DT Article
ID ELECTRON LOCALIZATION; FEMTOSECOND DYNAMICS; ULTRAFAST; SEMICONDUCTOR;
   INTERFACES; SPECTRUM; PHYSICS; COMPLEX; SYSTEM
AB We calculate the real space and time formation of a polaron quasiparticle from a bare electron. The time-dependent Schrodinger equation for the Holstein model of electron-phonon coupling is numerically integrated in a large Hilbert space to obtain the time evolution of the electron and phonon densities and the electron-phonon (el-ph) correlation functions. The quantum dynamical nature of the phonons is preserved. As the el-ph coupling increases, qualitative changes in polaron formation occur when the one-phonon polaron bound state forms. A potential barrier between the quasifree and heavy polaron states exists in dimensions D >= 2, consistent with earlier adiabatic theory. We compare to recent experiments.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Ku, LC (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA.
OI Trugman, Stuart/0000-0002-6688-7228
NR 31
TC 30
Z9 30
U1 3
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 JAN
PY 2007
VL 75
IS 1
AR 014307
DI 10.1103/PhysRevB.75.014307
PG 5
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600064
ER

PT J
AU Lai, K
   Pan, W
   Tsui, DC
   Lyon, S
   Muhlberger, M
   Schaffler, F
AF Lai, K.
   Pan, W.
   Tsui, D. C.
   Lyon, S.
   Muehlberger, M.
   Schaeffler, F.
TI Linear temperature dependence of the conductivity in Si two-dimensional
   electrons near the apparent metal-to-insulator transition
SO PHYSICAL REVIEW B
LA English
DT Article
ID 2 DIMENSIONS; SYSTEMS; PERCOLATION; BEHAVIOR; DENSITY; STATES; FIELD;
   GAS; B=0
AB In a high mobility two-dimensional electron system in Si, near the critical density, n(c)=0.32x10(11) cm(-2), of the apparent metal-to-insulator transition, the conductivity displays a linear temperature (T) dependence around the Fermi temperature. When sigma(0), the extrapolated T=0 conductivity from the linear T dependence, is plotted as a function of density, two regimes with different sigma(0)(n) relations are seen, suggestive of two different phases. Interestingly, a sharp transition between these two regimes coincides with n(c), and sigma(0) of the transition is similar to e(2)/h, the quantum conductance, per square. Toward T=0, the data deviate from linear sigma(T) relation and we discuss the possible percolation type of transition in our Si sample.
C1 Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA.
   Sandia Natl Labs, Albuquerque, NM 87185 USA.
   Univ Linz, Inst Halbleiterphys, A-4040 Linz, Austria.
RP Lai, K (reprint author), Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA.
RI Muhlberger, Michael/A-6586-2010; Schaffler, Friedrich/C-7026-2017; 
OI Schaffler, Friedrich/0000-0002-7093-2554; Muhlberger,
   Michael/0000-0001-7542-8552
NR 26
TC 25
Z9 25
U1 2
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD JAN
PY 2007
VL 75
IS 3
AR 033314
DI 10.1103/PhysRevB.75.033314
PG 4
WC Physics, Condensed Matter
SC Physics
GA 131UJ
UT WOS:000243895400017
ER

PT J
AU Lee, B
   Rudd, RE
AF Lee, Byeongchan
   Rudd, Robert E.
TI First-principles study of the Young's modulus of Si < 001 > nanowires
SO PHYSICAL REVIEW B
LA English
DT Article
ID AUGMENTED-WAVE METHOD; ELECTRONIC-PROPERTIES; SURFACE STRESS; SILICON;
   TRANSITION; NANOTUBES; MECHANICS; CRYSTALS
AB We report the results of first-principles density functional theory calculations of the Young's modulus and other mechanical properties of hydrogen-passivated Si < 001 > anowires. The nanowires are taken to have predominantly {100} surfaces, with small {110} facets. The Young's modulus, the equilibrium length, and the residual stress of a series of prismatic wires are found to have a size dependence that scales like the surface area to volume ratio for all but the smallest wires. We analyze the physical origin of the size dependence and compare the results to two existing models.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Lee, B (reprint author), Lawrence Livermore Natl Lab, L-415, Livermore, CA 94551 USA.
EM robert.rudd@llnl.gov
OI Rudd, Robert/0000-0002-6632-2681
NR 37
TC 74
Z9 74
U1 3
U2 17
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 JAN
PY 2007
VL 75
IS 4
AR 041305
DI 10.1103/PhysRevB.75.041305
PG 4
WC Physics, Condensed Matter
SC Physics
GA 131UL
UT WOS:000243895600008
ER

PT J
AU Lin, JF
   Fukui, H
   Prendergast, D
   Okuchi, T
   Cai, YQ
   Hiraoka, N
   Yoo, CS
   Trave, A
   Eng, P
   Hu, MY
   Chow, P
AF Lin, Jung-Fu
   Fukui, Hiroshi
   Prendergast, David
   Okuchi, Takuo
   Cai, Yong Q.
   Hiraoka, Nozomu
   Yoo, Choong-Shik
   Trave, Andrea
   Eng, Peter
   Hu, Michael Y.
   Chow, Paul
TI Electronic bonding transition in compressed SiO2 glass
SO PHYSICAL REVIEW B
LA English
DT Article
ID INDUCED COORDINATION CHANGES; NEAR-EDGE STRUCTURE; HIGH-PRESSURE;
   AMORPHOUS SILICA; SPECTROSCOPY; TRANSFORMATIONS; POLYMORPHS; SCATTERING;
   DIOXIDE; MELTS
AB Knowledge of the electronic structure of amorphous and liquid silica at high pressures is essential to understanding their complex properties ranging from silica melt in magma to silica glass in optics, electronics, and material science. Here we present oxygen near K-edge spectra of SiO2 glass to 51 GPa obtained using x-ray Raman scattering in a diamond-anvil cell. The x-ray Raman spectra below similar to 10 GPa are consistent with those of quartz and coesite, whereas the spectra above similar to 22 GPa are similar to that of stishovite. This pressure-induced spectral change indicates an electronic bonding transition occurring from a fourfold quartzlike to a sixfold stishovitelike configuration in SiO2 glass between 10 GPa and 22 GPa. In contrast to the irreversible densification, the electronic bonding transition is reversible upon decompression. The observed reversible bonding transition and irreversible densification call for a coherent understanding of the transformation mechanism in compressed SiO2 glass.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   Okayama Univ, Inst Study Earths Interior, Tottori 6820193, Japan.
   Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
   Nagoya Univ, Inst Adv Res, Nagoya, Aichi 4648601, Japan.
   Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan.
   Univ Chicago, Consortium Adv Radiat Sources, Chicago, IL 60637 USA.
   Argonne Natl Lab, Carnegie Inst Washington, HPCAT, Adv Photon Source, Argonne, IL 60439 USA.
RP Lin, JF (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94550 USA.
RI Prendergast, David/E-4437-2010; Lin, Jung-Fu/B-4917-2011; Cai,
   Yong/C-5036-2008; OKUCHI, Takuo/B-1884-2011; 
OI Cai, Yong/0000-0002-9957-6426; OKUCHI, Takuo/0000-0001-6907-0945; Fukui,
   Hiroshi/0000-0002-7880-635X
NR 30
TC 50
Z9 50
U1 3
U2 20
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 JAN
PY 2007
VL 75
IS 1
AR 012201
DI 10.1103/PhysRevB.75.012201
PG 4
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600008
ER

PT J
AU Lizarraga, R
   Nordstrom, L
   Eriksson, O
AF Lizarraga, Raquel
   Nordstrom, Lars
   Eriksson, Olle
TI Noncollinear spin states in TlCo2Se2-xSx alloys from first principles
SO PHYSICAL REVIEW B
LA English
DT Article
ID MAGNETIC-PROPERTIES
AB The observed transition of the magnetic structure from a noncollinear state at x=0 to a ferromagnetic phase at x=1.75, through a series of spin spirals in the substitutional TlCo2Se2-xSx alloys, has been investigated by first principles theory. Our calculations successfully reproduced the magnetic structure of TlCo2S2 and the obtained magnetic moment is somewhat higher (0.82 mu(beta) per Co atom) than the experimental value. However, TlCo2Se2 was found to possess an antiferromagnetic state which is inconsistent with the observed spin spiral. We show that the correct magnetic structure of TlCo2Se2 can be obtained if the distance between the Co layers is reduced. Moreover, we demonstrate that the modification of the Co interlayer distance is a crucial parameter that governs the nature of the magnetism in these alloys. We discuss a mechanism that could favor noncollinear states in TlCo2Se2 over the ferromagnetic configuration and explain the change of the magnetic structure in the substitutional TlCo2Se2-xSx alloys.
C1 Los Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 USA.
   Uppsala Univ, Dept Phys, S-75121 Uppsala, Sweden.
RP Lizarraga, R (reprint author), Los Alamos Natl Lab, Theoret Div, POB 1663, Los Alamos, NM 87545 USA.
RI Eriksson, Olle/E-3265-2014
OI Eriksson, Olle/0000-0001-5111-1374
NR 18
TC 2
Z9 2
U1 1
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 JAN
PY 2007
VL 75
IS 2
AR 024425
DI 10.1103/PhysRevB.75.024425
PG 5
WC Physics, Condensed Matter
SC Physics
GA 131UG
UT WOS:000243895100075
ER

PT J
AU Martinho, H
   Pagliuso, PG
   Fritsch, V
   Moreno, NO
   Sarrao, JL
   Rettori, C
AF Martinho, H.
   Pagliuso, P. G.
   Fritsch, V.
   Moreno, N. O.
   Sarrao, J. L.
   Rettori, C.
TI Vibrational and electronic excitations in the (Ce,La)MIn5 (M = Co,Rh)
   heavy-fermion family
SO PHYSICAL REVIEW B
LA English
DT Article
ID RAMAN-SCATTERING; IMPURITIES; METALS
AB We present a systematic study at ambient pressure of the phononic and electronic Raman-active excitations in the ab plane of the (Ce,La)MIn5 (M=Co,Rh) heavy-fermion family. We found that the characteristic Raman spectra of this family of compounds display two phonon modes at similar to 38 and similar to 165 cm(-1) and a broad electronic background centered at similar to 40 cm(-1). For CeCoIn5, the temperature dependence of these excitations shows anomalous behavior near T-*=45 K that may indicate a nontrivial renormalization of the electronic structure driven by strong correlations between hybridized 4f electrons.
C1 UNIVAP, Inst Pesquisa & Desenvolvimento, BR-12244050 Sao Jose Dos Campos, SP, Brazil.
   Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Univ Fed Sergipe, Dept Fis, BR-49100000 Sao Cristovao, Brazil.
RP Martinho, H (reprint author), UNIVAP, Inst Pesquisa & Desenvolvimento, BR-12244050 Sao Jose Dos Campos, SP, Brazil.
RI Rettori, Carlos/C-3966-2012; Pagliuso, Pascoal/C-9169-2012; Moreno,
   Nelson/H-1708-2012; Martinho, Herculano/F-4684-2015; Optica e
   Eletronica, Laboratorio/A-8669-2014; Inst. of Physics, Gleb
   Wataghin/A-9780-2017; Fritsch, Veronika/P-1352-2016
OI Rettori, Carlos/0000-0001-6692-7915; Moreno, Nelson/0000-0002-1672-4340;
   Fritsch, Veronika/0000-0002-6620-4554
NR 22
TC 3
Z9 3
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 JAN
PY 2007
VL 75
IS 4
AR 045108
DI 10.1103/PhysRevB.75.045108
PG 6
WC Physics, Condensed Matter
SC Physics
GA 131UL
UT WOS:000243895600025
ER

PT J
AU Menzel, A
   Chang, KC
   Komanicky, V
   Tolmachev, YV
   Tkachuk, AV
   Chu, YS
   You, H
AF Menzel, A.
   Chang, K. -C.
   Komanicky, V.
   Tolmachev, Y. V.
   Tkachuk, A. V.
   Chu, Y. S.
   You, H.
TI High-density electrosorbed carbon monoxide monolayers on Pt(111) under
   atmospheric pressure
SO PHYSICAL REVIEW B
LA English
DT Article
ID X-RAY-SCATTERING; SCANNING-TUNNELING-MICROSCOPY; SUM-FREQUENCY
   GENERATION; AUTOMATED TENSOR LEED; POTENTIAL-DEPENDENCE; ADLAYER
   STRUCTURES; CO; SURFACE; ADSORPTION; ELECTRODES
AB We report structure studies of high-density CO monolayers on Pt(111) surfaces in equilibrium with gaseous CO near atmospheric pressure, using surface x-ray scattering (SXS) and scanning tunneling microscopy (STM). We were able to stabilize extremely well-ordered CO monolayers by emersion transfer from an electrochemical cell. We found the hexagonal close-packed (2 x 2)-3CO structure at room temperature in similar to 1 atm CO gas pressure. We also confirm the (root 19 x root 19)-13CO structure previously proposed in STM studies [Vestergaard et al., Phys. Rev. Lett. 88, 259601 (2002)]. Based on SXS and STM measurements, a tentative phase diagram is proposed. Detailed SXS structure studies of the (2 x 2)-3CO structure suggest a surface structure and substrate reconstruction less symmetric than previously studies suggested. We also find that (root 19 x root 19)-13CO structure induces substrate reconstructions including the dimerization of Pt bonded to bridging CO and the rotation of the Pt cluster with atop CO.
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
   Argonne Natl Lab, Expt Facil Div, Argonne, IL 60439 USA.
RP Menzel, A (reprint author), Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
RI Menzel, Andreas/C-4388-2012; Chang, Kee-Chul/O-9938-2014; You,
   Hoydoo/A-6201-2011; 
OI Menzel, Andreas/0000-0002-0489-609X; Chang,
   Kee-Chul/0000-0003-1775-2148; You, Hoydoo/0000-0003-2996-9483;
   Tolmachev, Yuriy/0000-0001-6705-6058
NR 31
TC 9
Z9 9
U1 1
U2 14
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD JAN
PY 2007
VL 75
IS 3
AR 035426
DI 10.1103/PhysRevB.75.035426
PG 11
WC Physics, Condensed Matter
SC Physics
GA 131UJ
UT WOS:000243895400150
ER

PT J
AU Mijnarends, PE
   Kaprzyk, S
   Barbiellini, B
   Li, YW
   Mitchell, JF
   Montano, PA
   Bansil, A
AF Mijnarends, P. E.
   Kaprzyk, S.
   Barbiellini, B.
   Li, Yinwan
   Mitchell, J. F.
   Montano, P. A.
   Bansil, A.
TI Magnetic momentum density, Fermi surface, and directional magnetic
   Compton profiles in LaSr2Mn2O7 and La1.2Sr1.8Mn2O7
SO PHYSICAL REVIEW B
LA English
DT Article
ID COLOSSAL MAGNETORESISTIVE OXIDES; POLARIZED GAMMA-RAYS; MUFFIN-TIN
   ALLOYS; ELECTRONIC-STRUCTURE; MANGANITE LA2-2XSR1+2XMN2O7;
   NEUTRON-DIFFRACTION; SCATTERING; SOLIDS; GAS; APPROXIMATION
AB We have carried out first principles, all-electron computations of the magnetic momentum density rho(mag) (p) and magnetic Compton profiles (MCPs) for momentum transfer along the [100], [001], and [110] directions in LaSr2Mn2O7 and La1.2Sr1.8Mn2O7 within the local spin density approximation (LSDA) based band theory framework. Parallel measurements of these three MCPs from a single crystal of La1.2Sr1.8Mn2O7 at 5 K in a magnetic field of 7 T are also reported. rho(mag) (p) is shown to contain distinct peaks arising from the occupied majority-spin t(2g) electrons and to display images of the Fermi surface (FS) in the first and higher Brillouin zones (BZs). The overall shape of the MCPs, J(mag) (p(z)), obtained by integrating rho(mag) (p) over p(x) and p(y), is found to be dominated by the majority-spin t(2g) states. The FS-related fine structure in the MCPs is, however, substantial only in the [100] MCP, which contains features arising from the large majority-spin hole sheets. The overall shapes and widths of the experimental MCPs along all three directions investigated are in reasonably good accord with theoretical predictions, although some discrepancies indicating inadequacy of the LSDA in treating the magnetic states can be identified. We discuss details of the FS-related signatures in the first and higher BZs in the [100] MCP and show that high resolution magnetic Compton scattering experiments with a momentum resolution of 0.1 a.u. full-width-at-half-maximum or better will be necessary to observe this fine structure. We comment also on the feasibility of using positron annihilation spectroscopy in this connection.
C1 Northeastern Univ, Dept Phys, Boston, MA 02115 USA.
   Delft Univ Technol, Fac Sci Appl, Dept Radiat Rad & Reactors, Delft, Netherlands.
   AGH Univ Sci & Technol, PL-30059 Krakow, Poland.
   Univ Illinois, Dept Phys, Chicago, IL 60680 USA.
   Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
   US DOE, Sci User Fac Div, Washington, DC 20585 USA.
RP Mijnarends, PE (reprint author), Northeastern Univ, Dept Phys, Boston, MA 02115 USA.
RI Barbiellini, Bernardo/K-3619-2015
OI Barbiellini, Bernardo/0000-0002-3309-1362
NR 51
TC 11
Z9 11
U1 0
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD JAN
PY 2007
VL 75
IS 1
AR 014428
DI 10.1103/PhysRevB.75.014428
PG 8
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600092
ER

PT J
AU Moreschini, L
   Dallera, C
   Joyce, JJ
   Sarrao, JL
   Bauer, ED
   Fritsch, V
   Bobev, S
   Carpene, E
   Huotari, S
   Vanko, G
   Monaco, G
   Lacovig, P
   Panaccione, G
   Fondacaro, A
   Paolicelli, G
   Torelli, P
   Grioni, M
AF Moreschini, L.
   Dallera, C.
   Joyce, J. J.
   Sarrao, J. L.
   Bauer, E. D.
   Fritsch, V.
   Bobev, S.
   Carpene, E.
   Huotari, S.
   Vanko, G.
   Monaco, G.
   Lacovig, P.
   Panaccione, G.
   Fondacaro, A.
   Paolicelli, G.
   Torelli, P.
   Grioni, M.
TI Comparison of bulk-sensitive spectroscopic probes of Yb valence in Kondo
   systems
SO PHYSICAL REVIEW B
LA English
DT Article
ID X-RAY-ABSORPTION; TEMPERATURE-DEPENDENCE; ELECTRONIC-STRUCTURE;
   PHOTOELECTRON-SPECTROSCOPY; PHASE-TRANSITION; IMPURITY MODEL;
   PHOTOEMISSION; CE; YBIN1-XAGXCU4; RESONANCE
AB We exploited complementary synchrotron radiation spectroscopies to study the Yb 4f electronic configuration in three representative intermediate-valence materials: YbAl(3), YbInCu(4), and YbCu(2)Si(2). High-resolution x-ray absorption (PFY-XAS), resonant inelastic x-ray scattering (RIXS), and hard-x-ray photoemission (HAXPES) data all show characteristic temperature-dependent changes of the Yb valence. For each material, the increments measured from low (20 K) to high (300 K) temperature by the different probes are quite similar. The estimated RIXS and XAS valences are consistently higher than the HAXPES values. We briefly discuss the possible origin of this discrepancy.
C1 Ecole Polytech Fed Lausanne, IPN, CH-1015 Lausanne, Switzerland.
   Politecn Milan, INFM, Dipartimento Fis, I-20133 Milan, Italy.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Los Alamos Natl Lab, F-38043 Grenoble, France.
   European Synchrotron Radiat Facil, F-38043 Grenoble, France.
   INFM, Lab TASC, Basovizza, Italy.
   Univ Roma 3, INFM, I-00146 Rome, Italy.
   Univ Roma 3, Dipartimento Fis, I-00146 Rome, Italy.
   Univ Paris 11, LURE, F-91898 Orsay, France.
RP Moreschini, L (reprint author), Ecole Polytech Fed Lausanne, IPN, CH-1015 Lausanne, Switzerland.
RI Bauer, Eric/D-7212-2011; Vanko, Gyorgy/B-8176-2012; Carpene,
   Ettore/A-9162-2013; Paolicelli, Guido/B-7732-2015; Fritsch,
   Veronika/P-1352-2016; 
OI Vanko, Gyorgy/0000-0002-3095-6551; Paolicelli,
   Guido/0000-0002-9431-2309; Fritsch, Veronika/0000-0002-6620-4554;
   Carpene, Ettore/0000-0003-3867-8178; TORELLI, PIERO/0000-0001-9300-9685;
   Bauer, Eric/0000-0003-0017-1937; Huotari, Simo/0000-0003-4506-8722
NR 37
TC 38
Z9 38
U1 2
U2 21
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD JAN
PY 2007
VL 75
IS 3
AR 035113
DI 10.1103/PhysRevB.75.035113
PG 7
WC Physics, Condensed Matter
SC Physics
GA 131UJ
UT WOS:000243895400046
ER

PT J
AU Nam, HS
   Mendelev, MI
   Srolovitz, DJ
AF Nam, H. -S.
   Mendelev, M. I.
   Srolovitz, D. J.
TI Solid-liquid phase diagrams for binary metallic alloys: Adjustable
   interatomic potentials
SO PHYSICAL REVIEW B
LA English
DT Article
ID SOLID/LIQUID INTERFACES; MOLECULAR SIMULATION; COEXISTENCE; MIXTURES;
   DYNAMICS; EMBRITTLEMENT; EQUILIBRIUM; INTEGRATION; SYSTEMS; STATE
AB We develop an approach to determining Lennard-Jones embedded-atom method potentials for alloys and use these to determine the solid-liquid phase diagrams for binary metallic alloys using Kofke's Gibbs-Duhem integration technique combined with semigrand canonical Monte Carlo simulations. We demonstrate that it is possible to produce a wide range of experimentally observed binary phase diagrams (with no intermetallic phases) by reference to the atomic sizes and cohesive energies of the two elemental materials. In some cases, it is useful to employ a single adjustable parameter to adjust the phase diagram (we provided a good choice for this free parameter). Next, we perform a systematic investigation of the effect of relative atomic sizes and cohesive energies of the elements on the binary phase diagrams. We then show that this approach leads to good agreement with several experimental binary phase diagrams. The main benefit of this approach is not the accurate reproduction of experimental phase diagrams, but rather to provide a method by which material properties can be continuously changed in simulation studies. This is one of the keys to the use of atomistic simulations to understand mechanisms and properties in a manner not available to experiment.
C1 Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA.
   Ames Lab, Ames, IA 50011 USA.
   Yeshiva Univ, Dept Phys, New York, NY 10033 USA.
RP Nam, HS (reprint author), Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA.
EM hnam@princeton.edu
OI Nam, Ho-Seok/0000-0001-5720-8708
NR 32
TC 9
Z9 10
U1 0
U2 10
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 JAN
PY 2007
VL 75
IS 1
AR 014204
DI 10.1103/PhysRevB.75.014204
PG 9
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600052
ER

PT J
AU Nascimento, VB
   Moore, RG
   Rundgren, J
   Zhang, JD
   Cai, L
   Jin, R
   Mandrus, DG
   Plummer, EW
AF Nascimento, V. B.
   Moore, R. G.
   Rundgren, J.
   Zhang, Jiandi
   Cai, Lei
   Jin, R.
   Mandrus, D. G.
   Plummer, E. W.
TI Procedure for LEED I-V structural analysis of metal oxide surfaces:
   Ca1.5Sr0.5RuO4(001)
SO PHYSICAL REVIEW B
LA English
DT Article
ID ENERGY-ELECTRON-DIFFRACTION; MEAN FREE PATHS; POTENTIALS
AB Transition metal oxides (TMOs) are famous for the intimate coupling between the lattice, electrons, and spin, creating exotic functionality. Creating a surface, breaking the symmetry, should result in lattice distortions that due to the close coupling could create different "surface phases." Historically it has been very difficult to use low energy electron diffraction I-V to quantitatively determine the surface structure of TMOs. A signature of this problem is the large values commonly reported in the literature of the Pendry reliability factor (R-P), which is used to quantify the agreement between experimental data and calculated diffraction. In this paper we describe a consistent procedure for determining the phase shifts using an optimized muffin-tin potential approach combined with an energy-dependent real and imaginary inner potential. This procedure is used to determine the surface structure of the layered TMO Ca1.5Sr0.5RuO4. An acceptable Pendry reliability factor is achieved (R-P=0.28).
C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
   Royal Inst Technol, Dept Theoret Phys, Alba Nova Res Ctr, SE-10691 Stockholm, Sweden.
   Florida Int Univ, Dept Phys, Miami, FL 33199 USA.
   Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Nascimento, VB (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
EM vnascime@utk.edu
RI Mandrus, David/H-3090-2014
NR 39
TC 21
Z9 21
U1 1
U2 21
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD JAN
PY 2007
VL 75
IS 3
AR 035408
DI 10.1103/PhysRevB.75.035408
PG 11
WC Physics, Condensed Matter
SC Physics
GA 131UJ
UT WOS:000243895400132
ER

PT J
AU Offi, F
   Torelli, P
   Sacchi, M
   Lacovig, P
   Fondacaro, A
   Paolicelli, G
   Huotari, S
   Monaco, G
   Fadley, CS
   Mitchell, JF
   Stefani, G
   Panaccione, G
AF Offi, F.
   Torelli, P.
   Sacchi, M.
   Lacovig, P.
   Fondacaro, A.
   Paolicelli, G.
   Huotari, S.
   Monaco, G.
   Fadley, C. S.
   Mitchell, J. F.
   Stefani, G.
   Panaccione, G.
TI Bulk electronic properties of the bilayered manganite La1.2Sr1.8Mn2O7
   from hard-x-ray photoemission
SO PHYSICAL REVIEW B
LA English
DT Article
ID DOUBLE EXCHANGE; LAYERED MANGANITES; LA1-XSRXMNO3; OXIDES; RESISTIVITY;
   PHYSICS; CHARGE; FILMS; SPIN
AB We have performed hard-x-ray photoemission experiments at photon energy close to 6 keV on the ferromagnetic bilayered manganite La1.2Sr1.8Mn2O7 across its transition temperature T-C. Differences in both core level and valence band spectra have been observed as a function of temperature: We correlate the energy shift of the O 1s peak with a charge-transfer associated with the structural change taking place at the transition. A prominent shoulder on the low binding energy side of the Mn 2p core level that is observed below TC is tentatively ascribed to increased nonlocal screening in the ordered ferromagnetic phase.
C1 Univ Roma Tre, CNISM, I-00146 Rome, Italy.
   Univ Roma Tre, Dipartimento Fis, I-00146 Rome, Italy.
   CNR, INFM S3, I-41100 Modena, Italy.
   Univ Paris 06, UMR 7614, Lab Chim Phys Matiere & Rayonnement, F-75005 Paris, France.
   Synchrotron SOLEIL, F-91142 Gif Sur Yvette, France.
   Univ Paris 06, UMR 7614, F-75005 Paris, France.
   Sincrotrone Trieste, SCpA, I-34012 Trieste, Italy.
   European Synchrotron Radiat Facil, F-38042 Grenoble, France.
   Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
   Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA.
   Argonne Natl Lab, Div Sci Mat, Argonne, IL 60439 USA.
   CNR, INFM, TASC, Lab Nazl, I-34012 Trieste, Italy.
RP Offi, F (reprint author), Univ Roma Tre, CNISM, Via Della Vasca Navale 84, I-00146 Rome, Italy.
RI Torelli, Piero /F-8940-2010; stefani, giovanni/G-7348-2011; MSD,
   Nanomag/F-6438-2012; Paolicelli, Guido/B-7732-2015; 
OI Paolicelli, Guido/0000-0002-9431-2309; TORELLI,
   PIERO/0000-0001-9300-9685; Huotari, Simo/0000-0003-4506-8722
NR 33
TC 7
Z9 7
U1 3
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 JAN
PY 2007
VL 75
IS 1
AR 014422
DI 10.1103/PhysRevB.75.014422
PG 5
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600086
ER

PT J
AU Opeil, CP
   Schulze, RK
   Volz, HM
   Lashley, JC
   Manley, ME
   Hults, WL
   Hanrahan, RJ
   Smith, JL
   Mihaila, B
   Blagoev, KB
   Albers, RC
   Littlewood, PB
AF Opeil, C. P.
   Schulze, R. K.
   Volz, H. M.
   Lashley, J. C.
   Manley, M. E.
   Hults, W. L.
   Hanrahan, R. J., Jr.
   Smith, J. L.
   Mihaila, B.
   Blagoev, K. B.
   Albers, R. C.
   Littlewood, P. B.
TI Angle-resolved photoemission and first-principles electronic structure
   of single-crystalline alpha-U(001)
SO PHYSICAL REVIEW B
LA English
DT Article
ID ALPHA-URANIUM; METAL; STATES
AB Continuing the photoemission study begun with the work of Opeil [Phys. Rev. B 73, 165109 (2006)], in this paper we report results of an angle-resolved photoemission spectroscopy (ARPES) study performed on a high-quality single-crystal alpha-uranium at 173 K. The absence of surface-reconstruction effects is verified using x-ray Laue and low-energy electron diffraction patterns. We compare the ARPES intensity map with first-principles band structure calculations using a generalized gradient approximation and we find good correlations with the calculated dispersion of the electronic bands.
C1 Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA.
   Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
   Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England.
RP Opeil, CP (reprint author), Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA.
RI Cavendish, TCM/C-9489-2009; Littlewood, Peter/B-7746-2008; Mihaila,
   Bogdan/D-8795-2013; Manley, Michael/N-4334-2015; 
OI Mihaila, Bogdan/0000-0002-1489-8814; Schulze, Roland/0000-0002-6601-817X
NR 31
TC 9
Z9 9
U1 2
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 JAN
PY 2007
VL 75
IS 4
AR 045120
DI 10.1103/PhysRevB.75.045120
PG 5
WC Physics, Condensed Matter
SC Physics
GA 131UL
UT WOS:000243895600037
ER

PT J
AU Padilla, WJ
   Aronsson, MT
   Highstrete, C
   Lee, M
   Taylor, AJ
   Averitt, RD
AF Padilla, W. J.
   Aronsson, M. T.
   Highstrete, C.
   Lee, Mark
   Taylor, A. J.
   Averitt, R. D.
TI Electrically resonant terahertz metamaterials: Theoretical and
   experimental investigations
SO PHYSICAL REVIEW B
LA English
DT Article
ID FREQUENCIES; PLASMONS
AB We present a class of artificial materials that exhibit a tailored response to the electrical component of electromagnetic radiation. These electric metamaterials are investigated theoretically, computationally, and experimentally using terahertz time-domain spectroscopy. These structures display a resonant response including regions of negative permittivity epsilon(1)(omega)< 0 ranging from similar to 500 GHz to 1 THz. Conventional electric media such as distributed wires are difficult to incorporate into metamaterials. In contrast, these localized structures will simplify the construction of future metamaterials, including those with negative index of refraction. As these structures generalize to three dimensions in a straightforward manner, they will significantly enhance the design and fabrication of functional terahertz devices.
C1 MPA, CINT, Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Los Alamos Natl Lab, ISR 6, Los Alamos, NM 87545 USA.
   Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Padilla, WJ (reprint author), MPA, CINT, Los Alamos Natl Lab, MS K771, Los Alamos, NM 87545 USA.
EM Willie.Padilla@bc.edu
RI Padilla, Willie/A-7235-2008
OI Padilla, Willie/0000-0001-7734-8847
NR 22
TC 214
Z9 223
U1 11
U2 65
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 JAN
PY 2007
VL 75
IS 4
AR 041102
DI 10.1103/PhysRevB.75.041102
PG 4
WC Physics, Condensed Matter
SC Physics
GA 131UL
UT WOS:000243895600002
ER

PT J
AU Podolsky, D
   Vishwanath, A
   Moore, J
   Sachdev, S
AF Podolsky, Daniel
   Vishwanath, Ashvin
   Moore, Joel
   Sachdev, Subir
TI Thermoelectric transport near pair breaking quantum phase transition out
   of d-wave superconductivity
SO PHYSICAL REVIEW B
LA English
DT Article
ID NONZERO-TEMPERATURE; CRITICAL-POINTS
AB We study electric, thermal, and thermoelectric conductivities in the vicinity of a z=2 superconductor-diffusive metal transition in two dimensions, both in the high- and low-frequency limits. We find violation of the Wiedemann-Franz law and a dc thermoelectric conductivity alpha that does not vanish at low temperatures, in contrast to Fermi liquids. We introduce a Langevin equation formalism to study critical dynamics over a broad region surrounding the quantum critical point.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
RP Podolsky, D (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RI Podolsky, Daniel/D-5576-2013; Sachdev, Subir/A-8781-2013; Moore,
   Joel/O-4959-2016
OI Podolsky, Daniel/0000-0001-6428-2957; Sachdev,
   Subir/0000-0002-2432-7070; Moore, Joel/0000-0002-4294-5761
NR 15
TC 15
Z9 16
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 JAN
PY 2007
VL 75
IS 1
AR 014520
DI 10.1103/PhysRevB.75.014520
PG 5
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600127
ER

PT J
AU Prozorov, R
   Vannette, MD
   Samolyuk, GD
   Law, SA
   Bud'ko, SL
   Canfield, PC
AF Prozorov, Ruslan
   Vannette, Matthew D.
   Samolyuk, German D.
   Law, Stephanie A.
   Bud'ko, Sergey L.
   Canfield, Paul C.
TI Contactless measurements of Shubnikov-de Haas oscillations in the
   magnetically ordered state of CeAgSb2 and SmAgSb2 single crystals
SO PHYSICAL REVIEW B
LA English
DT Article
ID PENETRATION DEPTH; RAGSB2 R; LA-ND; SM; SUPERCONDUCTORS; TM; GD
AB Shubnikov-de Haas oscillations were measured in single crystals of highly metallic antiferromagnetic SmAgSb2 and ferromagnetic CeAgSb2 using a tunnel diode resonator. Resistivity oscillations as a function of applied magnetic field were observed via measurements of skin depth variation. The effective resolution of Delta rho similar or equal to 20 p Omega allows a detailed study of the SdH spectra as a function of temperature. The effects of the Sm long-range magnetic ordering as well as its electronic structure (4f electrons) on the Fermi surface topology is discussed.
C1 Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA.
   Iowa State Univ Sci & Technol, Dept Phys & Astron, Ames, IA 50011 USA.
RP Prozorov, R (reprint author), Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA.
EM prozorov@ameslab.gov
RI Prozorov, Ruslan/A-2487-2008; Canfield, Paul/H-2698-2014
OI Prozorov, Ruslan/0000-0002-8088-6096; 
NR 18
TC 7
Z9 7
U1 3
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 JAN
PY 2007
VL 75
IS 1
AR 014413
DI 10.1103/PhysRevB.75.014413
PG 7
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600077
ER

PT J
AU Roy, S
   Sanchez-Hanke, C
   Park, S
   Fitzsimmons, MR
   Tang, YJ
   Hong, JI
   Smith, DJ
   Taylor, BJ
   Liu, X
   Maple, MB
   Berkowitz, AE
   Kao, CC
   Sinha, SK
AF Roy, S.
   Sanchez-Hanke, C.
   Park, S.
   Fitzsimmons, M. R.
   Tang, Y. J.
   Hong, J. I.
   Smith, David J.
   Taylor, B. J.
   Liu, X.
   Maple, M. B.
   Berkowitz, A. E.
   Kao, C. -C.
   Sinha, S. K.
TI Evidence of modified ferromagnetism at a buried Permalloy/CoO interface
   at room temperature
SO PHYSICAL REVIEW B
LA English
DT Article
ID EXCHANGE; SCATTERING
AB We have used magnetometry and resonant soft x-ray magnetic reflectometry to determine the depth-dependent charge and magnetization density on an absolute scale across a Permalloy/CoO interface above the Neel temperature of CoO. A thin magnetic layer of 1.0 nm forms at the interface. This layer has larger magnetization density and different temperature dependence of magnetization than Permalloy.
C1 Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
   Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Univ Calif San Diego, Ctr Magnet Recording Res, La Jolla, CA 92093 USA.
   Arizona State Univ, Ctr Solid State Sci, Tempe, AZ 85287 USA.
   Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA.
   Busan Ctr, Korea Basic Sci Inst, Pusan 609735, South Korea.
RP Roy, S (reprint author), Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
EM sujoy@physics.ucsd.edu
RI Lujan Center, LANL/G-4896-2012; HONG, JUNG-IL/B-8566-2008
OI HONG, JUNG-IL/0000-0001-7301-6693
NR 21
TC 21
Z9 21
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 JAN
PY 2007
VL 75
IS 1
AR 014442
DI 10.1103/PhysRevB.75.014442
PG 6
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600106
ER

PT J
AU Rozenberg, GK
   Amiel, Y
   Xu, WM
   Pasternak, MP
   Jeanloz, R
   Hanfland, M
   Taylor, RD
AF Rozenberg, G. Kh.
   Amiel, Y.
   Xu, W. M.
   Pasternak, M. P.
   Jeanloz, R.
   Hanfland, M.
   Taylor, R. D.
TI Structural characterization of temperature- and pressure-induced inverse
   <-> normal spinel transformation in magnetite
SO PHYSICAL REVIEW B
LA English
DT Article
ID DIFFRACTION; CRYSTAL; FE3O4; GPA
AB High-precision powder x-ray diffraction and Fe-57 Mossbauer studies up to 20 GPa show that magnetite (Fe3O4) undergoes a reversible normal <-> inverse transition with increasing pressure or decreasing temperature. There is no resolvable change in the spinel-type crystal structure or unit-cell volume at the phase transition. However, the volume of the tetrahedral (A) site increases (17%) and that of the octahedral (B) site decreases (similar to 7%) as electron charge density is transferred from the B to the A site. The corresponding valence changes cause the inverse -> normal transition with increasing pressure: Fe-A(3+)-> Fe-A(2+) and Fe-B(2.5+)-> Fe-B(3+). There is an intermediate mixed configuration region at pressure-temperature (P-T) conditions lying between those at which magnetite is normal, T < T-norm(P), or inverse, T>T-inv(P).
C1 Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel.
   Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
   European Synchrotron Radiat Facil, F-38043 Grenoble, France.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Rozenberg, GK (reprint author), Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel.
NR 23
TC 42
Z9 43
U1 3
U2 31
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 JAN
PY 2007
VL 75
IS 2
AR 020102
DI 10.1103/PhysRevB.75.020102
PG 4
WC Physics, Condensed Matter
SC Physics
GA 131UG
UT WOS:000243895100002
ER

PT J
AU Sai, N
   Li, ZQ
   Martin, MC
   Basov, DN
   Di Ventra, M
AF Sai, N.
   Li, Z. Q.
   Martin, M. C.
   Basov, D. N.
   Di Ventra, M.
TI Electronic excitations and metal-insulator transition in
   poly(3-hexylthiophene) organic field-effect transistors
SO PHYSICAL REVIEW B
LA English
DT Article
ID THIN-FILM TRANSISTORS; CONDUCTING POLYMERS; REGIOREGULAR
   POLY(3-HEXYLTHIOPHENE); CONJUGATED POLYMERS; HIGH-MOBILITY;
   POLYACETYLENE; CHARGE; POLARONS; SOLITONS; BIPOLARONS
AB We carry out a comprehensive theoretical and experimental study of charge injection in poly(3-hexylthiophene) (P3HT) to determine the most likely scenario for metal-insulator transition in this system. We calculate the optical-absorption frequencies corresponding to a polaron and a bipolaron lattice in P3HT. We also analyze the electronic excitations for three possible scenarios under which a first- or a second-order metal-insulator transition can occur in doped P3HT. These theoretical scenarios are compared with data from infrared absorption spectroscopy on P3HT thin-film field-effect transistors (FETs). Our measurements and theoretical predictions suggest that charge-induced localized states in P3HT FETs are bipolarons and that the highest doping level achieved in our experiments approaches that required for a first-order metal-insulator transition.
C1 Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
   Lawrence Berkeley Natl Lab, Adv Light Source Div, Berkeley, CA 94720 USA.
RP Sai, N (reprint author), Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
RI Di Ventra, Massimiliano/E-1667-2011
OI Di Ventra, Massimiliano/0000-0001-9416-189X
NR 48
TC 20
Z9 20
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 JAN
PY 2007
VL 75
IS 4
AR 045307
DI 10.1103/PhysRevB.75.045307
PG 9
WC Physics, Condensed Matter
SC Physics
GA 131UL
UT WOS:000243895600069
ER

PT J
AU Sau, JD
   Cohen, ML
AF Sau, Jay Deep
   Cohen, Marvin L.
TI Possibility of increased mobility in Ge-Sn alloy system
SO PHYSICAL REVIEW B
LA English
DT Article
ID BAND-STRUCTURE; ELECTRONIC-STRUCTURE; SEMICONDUCTORS; GAPS; GERMANIUM;
   SILICON
AB We study the effect of strain and alloying with Sn on the band structure of Ge using a combination of ab initio and empirical pseudopotential techniques. The properties calculated are used to determine the phonon and alloy scattering contributions to the mobility. Using the dependence of the mobility on strain and alloying Sn, we propose a combination of alloying and biaxial strain to enhance both the electron and hole mobilities of Ge.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Sau, JD (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM jaydeep@socrates.berkeley.edu
NR 23
TC 94
Z9 95
U1 2
U2 22
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 JAN
PY 2007
VL 75
IS 4
AR 045208
DI 10.1103/PhysRevB.75.045208
PG 7
WC Physics, Condensed Matter
SC Physics
GA 131UL
UT WOS:000243895600059
ER

PT J
AU Singh, DJ
   Gupta, M
   Gupta, R
AF Singh, D. J.
   Gupta, M.
   Gupta, R.
TI Cohesion of BaReH9 and BaMnH9: Density functional calculations and
   prediction of (MnH9)(2-) salts
SO PHYSICAL REVIEW B
LA English
DT Article
ID METAL-HYDROGEN COMPOUNDS; MAGNETIC-PROPERTIES; CRYSTAL STRUCTURE;
   HYDRIDES; CLUSTERS; COMPLEX; GROWTH
AB Density functional calculations are used to calculate the structural and electronic properties of BaReH9 and to analyze the bonding in this compound. The high coordination in BaReH9 is due to bonding between Re 5d states and states of d-like symmetry formed from combinations of H s orbitals in the H-9 cage. This explains the structure of the material, its short bond lengths, and other physical properties, such as the high band gap. We compare with results for hypothetical BaMnH9, which we find to have similar bonding and cohesion to the Re compound. This suggests that it may be possible to synthesize (MnH9)(2-) salts. Depending on the particular cation, such salts may have exceptionally high hydrogen contents, in excess of 10 wt %.
C1 Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
   Univ Paris 11, EA3547, F-91405 Orsay, France.
   Ctr Etud Saclay, Serv Rech Met Phys, CEA, F-91191 Gif Sur Yvette, France.
RP Singh, DJ (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RI Singh, David/I-2416-2012
NR 28
TC 13
Z9 13
U1 0
U2 3
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD JAN
PY 2007
VL 75
IS 3
AR 035103
DI 10.1103/PhysRevB.75.035103
PG 6
WC Physics, Condensed Matter
SC Physics
GA 131UJ
UT WOS:000243895400036
ER

PT J
AU Singh, DJ
AF Singh, D. J.
TI Kinetic-energy-stabilized superconductivity in cuprates
SO PHYSICAL REVIEW B
LA English
DT Article
ID GENERALIZED GRADIENT APPROXIMATION; HIGH-TEMPERATURE SUPERCONDUCTIVITY;
   CONDENSATION ENERGY; SPIN FLUCTUATIONS; HUBBARD-MODEL; NORMAL-STATE;
   SURFACES; LA2CUO4
AB The possibility of kinetic-energy-driven superconductivity in cuprates, as was recently found in the tJ model with kinetic energy defined as hopping energy, is discussed. We argue that the violation of the virial theorem implied by this result is serious and means that the description of superconductivity within the tJ model is not complete.
C1 Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Singh, DJ (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, POB 2008, Oak Ridge, TN 37831 USA.
RI Singh, David/I-2416-2012
NR 38
TC 6
Z9 6
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 JAN
PY 2007
VL 75
IS 1
AR 012501
DI 10.1103/PhysRevB.75.012501
PG 3
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600027
ER

PT J
AU Uberuaga, BP
   Stuart, SJ
   Voter, AF
AF Uberuaga, Blas Pedro
   Stuart, Steven J.
   Voter, Arthur F.
TI Parallel replica dynamics for driven systems: Derivation and application
   to strained nanotubes
SO PHYSICAL REVIEW B
LA English
DT Article
ID WALLED CARBON NANOTUBES; MECHANICS; SIMULATION; FRACTURE; DEFECTS
AB We show that parallel replica dynamics can be extended to driven systems (e.g., systems with time-dependent boundary conditions). Each processor simulates a replica at a driving rate that is M times faster than the desired rate, where M is the number of processors. As in regular parallel replica dynamics, when a transition to a new state is detected on any processor, the times are summed and every processor is restarted in the new state. The state-to-state dynamics are shown to be correct if the processors run at the same speed and the system is driven slowly enough (on each processor) so that the escape rates do not depend on the time history of the drive. We demonstrate the algorithm by stretching a carbon nanotube with a preexisting vacancy, noting a significant dependence of the nature of nanotube yield on the strain rate. In particular, we are able to achieve strain rates slow enough such that the time scale for vacancy diffusion is faster than that for mechanical yield at a temperature of 2000 K. We thus observe vacancy-induced morphological changes in the nanotube structure, providing some insight into previously unexplained experimental features.
C1 Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA.
   Clemson Univ, Dept Chem, Clemson, SC 29634 USA.
   Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Uberuaga, BP (reprint author), Los Alamos Natl Lab, Mat Sci & Technol Div, POB 1663, Los Alamos, NM 87545 USA.
RI Stuart, Steven/H-1111-2012
NR 24
TC 26
Z9 26
U1 1
U2 10
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD JAN
PY 2007
VL 75
IS 1
AR 014301
DI 10.1103/PhysRevB.75.014301
PG 9
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600058
ER

PT J
AU Urbano, RR
   Bittar, EM
   Pires, MA
   Ferreira, LM
   Bufaical, L
   Rettori, C
   Pagliuso, PG
   Magill, B
   Oseroff, SB
   Thompson, JD
   Sarrao, JL
AF Urbano, R. R.
   Bittar, E. M.
   Pires, M. A.
   Ferreira, L. Mendonca
   Bufaical, L.
   Rettori, C.
   Pagliuso, P. G.
   Magill, B.
   Oseroff, S. B.
   Thompson, J. D.
   Sarrao, J. L.
TI Multiband effects in the electron spin resonance of Gd3+ in the
   intermediate-valence compound YbAl3 and its reference compound LuAl3
SO PHYSICAL REVIEW B
LA English
DT Article
ID INTERMETALLIC COMPOUNDS; MAGNETIC-SUSCEPTIBILITY; EXCHANGE INTERACTION;
   HEAVY FERMIONS; KONDO-LATTICE; YB COMPOUNDS; METALS; ALLOYS; CERIUM;
   RELAXATION
AB Electron spin resonance (ESR) results of Gd3+ in YbAl3 and LuAl3 are analyzed using a multiband (f-, d-, and p-type) model of correlated conduction electrons. The need for a multiband analysis of our results is based on the following observations: (i) the Korringa rates b similar or equal to 14 Oe/K and b similar or equal to 9 Oe/K for Gd3+ for YbAl3 and LuAl3, respectively, are larger than those expected from the respective measured g shifts (Knight shift), and (ii) negative and positive g shifts Delta g similar or equal to-0.004 and Delta g similar or equal to+0.003 were observed for Gd3+ in YbAl3 and LuAl3, respectively. Specific heat and magnetic susceptibility measurements, in the samples studied by ESR, show that electron-electron correlations are present in both compounds.
C1 Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil.
   Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA.
   Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA.
   San Diego State Univ, San Diego, CA 92182 USA.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Urbano, RR (reprint author), Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil.
RI Bittar, Eduardo/B-6266-2008; Rettori, Carlos/C-3966-2012; Ferreira,
   Leticie/C-4311-2012; Pagliuso, Pascoal/C-9169-2012; Urbano,
   Ricardo/F-5017-2012; Inst. of Physics, Gleb Wataghin/A-9780-2017;
   Bufaical, Leandro/K-6822-2016
OI Bittar, Eduardo/0000-0002-2762-1312; Rettori,
   Carlos/0000-0001-6692-7915; Bufaical, Leandro/0000-0001-7304-7334
NR 52
TC 9
Z9 9
U1 3
U2 11
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 JAN
PY 2007
VL 75
IS 4
AR 045107
DI 10.1103/PhysRevB.75.045107
PG 7
WC Physics, Condensed Matter
SC Physics
GA 131UL
UT WOS:000243895600024
ER

PT J
AU Wilson-Short, GB
   Singh, DJ
   Fornari, M
   Suewattana, M
AF Wilson-Short, G. B.
   Singh, D. J.
   Fornari, M.
   Suewattana, M.
TI Thermoelectric properties of rhodates: Layered beta-SrRh2O4 and spinel
   ZnRh2O4
SO PHYSICAL REVIEW B
LA English
DT Article
ID ELECTRONIC-STRUCTURE; RHODIUM OXIDES; SYSTEMS; METALS; STATE;
   THERMOPOWER; NAXCOO2; MERIT; WATER
AB Density functional calculations are used to obtain the electronic structure of beta-SrRh2O4 in comparison with spinel ZnRh2O4. Both materials are band insulators, with substantial crystal field induced band gaps, reflecting strong transition-metal-O hybridization. However, due to the bonding topology in these materials, the valence bands are very narrow. This leads to high thermopowers within standard Boltzmann transport theory, and indicates that they can be the basis of good thermoelectric materials provided that they can be doped into metallic states with reasonable carrier mobility. In the case of beta-SrRh2O4, scattering due to Sr disorder is important. Also, again in beta-SrRh2O4, the band gap may be large enough to be of interest for photoelectrochemical H-2 production.
C1 Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
   Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA.
   Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA.
RP Wilson-Short, GB (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, POB 2008, Oak Ridge, TN 37831 USA.
RI Fornari, Marco/C-8848-2012; Singh, David/I-2416-2012
OI Fornari, Marco/0000-0001-6527-8511; 
NR 52
TC 30
Z9 31
U1 5
U2 37
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 JAN
PY 2007
VL 75
IS 3
AR 035121
DI 10.1103/PhysRevB.75.035121
PG 13
WC Physics, Condensed Matter
SC Physics
GA 131UJ
UT WOS:000243895400054
ER

PT J
AU Wu, Y
   Xu, ZH
   Hu, B
   Howe, J
AF Wu, Yue
   Xu, Zhihua
   Hu, Bin
   Howe, Jane
TI Tuning magnetoresistance and magnetic-field-dependent
   electroluminescence through mixing a strong-spin-orbital-coupling
   molecule and a weak-spin-orbital-coupling polymer
SO PHYSICAL REVIEW B
LA English
DT Article
ID LIGHT-EMITTING-DIODES; CHARGE-TRANSFER FLUORESCENCE; CONJUGATED
   POLYMERS; SANDWICH DEVICES; ROOM-TEMPERATURE; EMISSION; RECOMBINATION;
   COMPLEXES; CRYSTALS; ENERGY
AB We report a tunable magnetoresistance by uniformly mixing strong-spin-orbital-coupling molecule fac-tris (2-phenylpyridinato) iridium [Ir(ppy)(3)] and weak-spin-orbital-coupling polymer poly(N-vinyl carbazole) (PVK). Three possible mechanisms, namely charge transport distribution, energy transfer, and intermolecular spin-orbital interaction, are discussed to interpret the Ir(ppy)(3) concentration-dependent magnetoresistance in the PVK+Ir(ppy)(3) composite. The comparison between the magnetic field effects measured from energy-transfer and nonenergy-transfer Ir(ppy)(3) doped polymer composites indicates that energy transfer and intermolecular spin-orbital interaction lead to rough and fine tuning for the magnetoresistance, respectively. Furthermore, the photocurrent dependence of magnetic field implies that the excited states contribute to the magnetoresistance through dissociation. As a result, the modification of singlet or triplet ratio of excited states through energy transfer and intermolecular spin-orbital interaction form a mechanism to tune the magnetoresistance in organic semiconducting materials.
C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Wu, Y (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM bhu@utk.edu
RI Xu, Zhihua/G-3956-2011; Howe, Jane/G-2890-2011; Hu, Bin/A-2954-2015
OI Hu, Bin/0000-0002-1573-7625
NR 33
TC 74
Z9 79
U1 4
U2 29
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 JAN
PY 2007
VL 75
IS 3
AR 035214
DI 10.1103/PhysRevB.75.035214
PG 6
WC Physics, Condensed Matter
SC Physics
GA 131UJ
UT WOS:000243895400081
ER

PT J
AU Xia, ZG
   Sun, DY
   Asta, M
   Hoyt, JJ
AF Xia, Z. G.
   Sun, D. Y.
   Asta, M.
   Hoyt, J. J.
TI Molecular dynamics calculations of the crystal-melt interfacial mobility
   for hexagonal close-packed Mg
SO PHYSICAL REVIEW B
LA English
DT Article
ID LENNARD-JONES SYSTEM; DENDRITIC SOLIDIFICATION; UNDERCOOLED MELTS;
   PHASE-FIELD; SIMULATIONS; GROWTH; CRYSTALLIZATION; EQUILIBRIUM; MODEL;
   RATES
AB The kinetics of crystallization from the melt is investigated for hcp Mg employing molecular dynamics simulations based on a recently developed embedded-atom-method interatomic potential. The interface mobility (mu), defined as the constant of proportionality between interface velocity and undercooling, is calculated for the three high-symmetry orientations (0001), (10 (1) over bar0), and (11 (2) over bar 0). The magnitudes of the interface mobilities are found to lie in the range of 40-80 cm/s/K. The mobilities mu(10 (1) over bar0) and mu(11 (2) over bar0) are found to be of comparable magnitude and approximately 1.7 times larger than mu(0001). The calculated dependence of mu on interface normal is discussed within the framework of the kinetic density-functional theory (DFT) formulation of Mikheev and Chernov.
C1 E China Normal Univ, Key Lab Opt & Magnet Resonance Spect, Shanghai 200062, Peoples R China.
   E China Normal Univ, Dept Phys, Shanghai 200062, Peoples R China.
   Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
   Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Xia, ZG (reprint author), E China Normal Univ, Key Lab Opt & Magnet Resonance Spect, Shanghai 200062, Peoples R China.
RI Sun, Deyan/D-5088-2012
OI Sun, Deyan/0000-0002-9728-8017
NR 42
TC 37
Z9 38
U1 0
U2 17
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 JAN
PY 2007
VL 75
IS 1
AR 012103
DI 10.1103/PhysRevB.75.012103
PG 4
WC Physics, Condensed Matter
SC Physics
GA 131UC
UT WOS:000243894600003
ER

PT J
AU Zhang, GP
   George, TF
   Assoufid, L
   Mansoori, GA
AF Zhang, G. P.
   George, Thomas F.
   Assoufid, Lahsen
   Mansoori, G. Ali
TI First-principles simulation of the interaction between adamantane and an
   atomic-force-microscope tip
SO PHYSICAL REVIEW B
LA English
DT Article
ID DENSITY; ENERGY; APPROXIMATION; FUNCTIONALS; RESOLUTION; GROUP-11;
   DIAMOND; LIQUID
AB A first-principles calculation is performed to investigate the interaction between adamantane and an atomic-force-microscope tip. By holding the tip at different distances from adamantane, three scans across two surfaces, one with a carbon atom at the center and the four other equivalent atoms at the corners, and the other with three equivalent carbon atoms in the front and three other atoms in the back forming a hexagon shape, reveal the detailed morphology of adamantane. For the first scan surface, a huge potential energy change is observed when the tip is close to adamantane, which results from the strong interaction from two hydrogen atoms attached to the center carbon atom. On the second scan surface, a radial scan shows the maximum force constant of 2 hartrees/A(2). This is proof of the hardness of adamantane. The rotational scan along the second surface reveals a systematic change in the potential energy as the tip is moved away from adamantane. Due to the existence of two types of carbon atoms in adamantane, the original potential maxima are shifted 60 degrees to new maxima. Between these maxima, there is a flat region. Finally, an x-y force scan over the above two surfaces is performed, where two distinctive images of hydrogen atoms are found. These results are detectable experimentally.
C1 Indiana State Univ, Dept Phys, Terre Haute, IN 47809 USA.
   Univ Missouri, Dept Phys & Astron, St Louis, MO 63121 USA.
   Univ Missouri, Off Chancellor, St Louis, MO 63121 USA.
   Univ Missouri, Ctr Mol Elect, Dept Chem & Biochem, St Louis, MO 63121 USA.
   Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA.
   Univ Illinois, Dept Chem Engn, Chicago, IL 60607 USA.
   Univ Illinois, Dept Bioengn, Chicago, IL 60607 USA.
RP Zhang, GP (reprint author), Indiana State Univ, Dept Phys, Terre Haute, IN 47809 USA.
NR 42
TC 15
Z9 15
U1 0
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD JAN
PY 2007
VL 75
IS 3
AR 035413
DI 10.1103/PhysRevB.75.035413
PG 7
WC Physics, Condensed Matter
SC Physics
GA 131UJ
UT WOS:000243895400137
ER

PT J
AU Zhong, JX
   Stocks, GM
AF Zhong, Jianxin
   Stocks, G. Malcolm
TI Persistent mobility edges and anomalous quantum diffusion in
   order-disorder separated quantum films
SO PHYSICAL REVIEW B
LA English
DT Article
ID NON-METALLIC CONDUCTION; LOW-TEMPERATURES; 2 DIMENSIONS; GRAPHENE;
   SYSTEMS; LOCALIZATION; STATISTICS; TRANSITION; TRANSPORT; CRYSTALS
AB A concept of order-disorder separated quantum films is proposed for the design of ultrathin quantum films of a few atomic layers thick with unconventional transport properties. The concept is demonstrated through studying an atomic bilayer comprised of an ordered layer and a disordered layer. Without the disordered layer or the ordered layer, the system is a conducting two-dimensional (2D) crystal or an insulating disordered 2D electron system. Without the order-disorder phase separation, a disordered bilayer is insulating under large disorder. In an order-disorder separated atomic bilayer, however, we show that the system behaves remarkably different from conventional ordered or disordered electron systems, exhibiting metal-insulator transitions with persistent mobility edges and superdiffusive anomalous quantum diffusion.
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   Xiangtan Univ, Dept Phys, Xiangtan 411105, Peoples R China.
RP Zhong, JX (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA.
EM zhongjn@ornl.gov
RI Stocks, George Malcollm/Q-1251-2016
OI Stocks, George Malcollm/0000-0002-9013-260X
NR 20
TC 17
Z9 18
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 JAN
PY 2007
VL 75
IS 3
AR 033410
DI 10.1103/PhysRevB.75.033410
PG 4
WC Physics, Condensed Matter
SC Physics
GA 131UJ
UT WOS:000243895400030
ER

PT J
AU Zou, M
   Mudryk, Y
   Pecharsky, VK
   Gschneidner, KA
   Schlagel, DL
   Lograsso, TA
AF Zou, M.
   Mudryk, Ya.
   Pecharsky, V. K.
   Gschneidner, K. A., Jr.
   Schlagel, D. L.
   Lograsso, T. A.
TI Crystallography, anisotropic metamagnetism, and magnetocaloric effect in
   Tb5Si2.2Ge1.8
SO PHYSICAL REVIEW B
LA English
DT Article
ID MAGNETIC REFRIGERATION; PARAMAGNETIC PHASE; SINGLE-CRYSTAL; TRANSITIONS;
   LU
AB The metamagnetic-like transitions and giant magnetocaloric effect were observed with the magnetic field applied parallel to the a and c axes, but not the b axis in a Tb5Si2.2Ge1.8 single crystal. The in situ x-ray powder diffraction study indicates that these metamagnetic-like transitions are coupled to crystallographic phase transformations occurring via strong magnetoelastic interactions. The magnetocrystalline anisotropy plays an important role in this system. Magnetic fields less than 40 kOe cannot drive either the magnetic or the crystallographic phase transition to completion for Tb5Si2.2Ge1.8 powder due to the strong single ion anisotropy of Tb.
C1 Iowa State Univ, Ames Lab United States, Dept Energy, Mat & Engn Phys Program, Ames, IA 50011 USA.
   Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
   Iowa State Univ, Ctr Nondestruct Evaluat, Ames, IA 50011 USA.
   Iowa State Univ, Dept Mat Sci & Engn, Iowa City, IA 50011 USA.
RP Pecharsky, VK (reprint author), Iowa State Univ, Ames Lab United States, Dept Energy, Mat & Engn Phys Program, Ames, IA 50011 USA.
EM vitkp@ameslab.gov
NR 36
TC 33
Z9 34
U1 1
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 JAN
PY 2007
VL 75
IS 2
AR 024418
DI 10.1103/PhysRevB.75.024418
PG 8
WC Physics, Condensed Matter
SC Physics
GA 131UG
UT WOS:000243895100068
ER

PT J
AU Basunia, MS
   Shugart, HA
   Smith, AR
   Norman, EB
AF Basunia, M. S.
   Shugart, H. A.
   Smith, A. R.
   Norman, E. B.
TI Measurement of cross sections for alpha-induced reactions on Au-197 and
   thick-target yields for the (alpha,gamma) process on Zn-64 and Cu-63
SO PHYSICAL REVIEW C
LA English
DT Article
ID ASTROPHYSICAL RP; GAMMA-PROCESSES; PROTON CAPTURE; REACTION-RATES;
   P-PROCESS; ENERGIES; RELEVANT; AL-26; GOLD
AB We have measured the cross sections for the Au-197(alpha,gamma)Tl-201 and Au-197(alpha,2n)Tl-199 reactions in the 17.9- to 23.9-MeV energy range, and Au-197(alpha,n)Tl-200 reaction in the 13.4- to 23.9-MeV energy range using an activation technique. Thick-target yields for the Zn-64(alpha,gamma)Ge-68 (7- to 14-MeV) and Cu-63(alpha,gamma)Ga-67 (7-MeV) reactions were measured. For all measurements, natural elements were bombarded with He+ beams from the 88 In. Cyclotron at the Lawrence Berkeley National Laboratory (LBNL). Irradiated samples were counted using a gamma-spectrometry system at LBNL's Low Background Facility. Measured Au-197(alpha,gamma)Tl-201 cross sections were compared with the NON-SMOKER theoretical values. The thick-target yields for the Zn-64(alpha,gamma)Ge-68 and Cu-63(alpha,gamma)Ga-67 reactions are also compared with the theoretical yield, calculated numerically using the energy dependent NON-SMOKER cross section data. In both cases, measured values are found to follow a trend of overlapping the predicted value near the alpha nucleus barrier height and fall below with a slowly widening difference between them in the sub-barrier energy points.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
   Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA.
RP Basunia, MS (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
NR 25
TC 16
Z9 16
U1 0
U2 2
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 JAN
PY 2007
VL 75
IS 1
AR 015802
DI 10.1103/PhysRevC.75.015802
PG 6
WC Physics, Nuclear
SC Physics
GA 131UN
UT WOS:000243896000057
ER

PT J
AU Chang, L
   Liu, YX
   Bhagwat, MS
   Roberts, CD
   Wright, SV
AF Chang, Lei
   Liu, Yu-Xin
   Bhagwat, Mandar S.
   Roberts, Craig D.
   Wright, Stewart V.
TI Dynamical chiral symmetry breaking and a critical mass
SO PHYSICAL REVIEW C
LA English
DT Article
ID DYSON-SCHWINGER EQUATIONS; Q(Q)OVER-BAR BOUND-STATES; QUANTUM
   CHROMODYNAMICS; QUARK PROPAGATOR; ASYMPTOTIC FREEDOM; HADRON PHYSICS;
   QCD; CONFINEMENT; MODEL; CONVERGENCE
AB On a bounded, measurable domain of non-negative current-quark mass, realistic models of the QCD gap equation can simultaneously admit two nonequivalent dynamical chiral symmetry breaking (DCSB) solutions and a solution that is unambiguously connected with the realization of chiral symmetry in the Wigner mode. The Wigner solution and one of the DCSB solutions are destabilized by a current-quark mass, and both disappear when that mass exceeds a critical value. This critical value also bounds the domain on which the surviving DCSB solution possesses a chiral expansion. This value can therefore be viewed as an upper bound on the domain within which a perturbative expansion in the current-quark mass around the chiral limit is uniformly valid for physical quantities. For a pseudoscalar meson constituted of equal-mass current quarks, it corresponds to a mass m(0)(-)similar to 0.45 GeV. In our discussion, we employ properties of the two DCSB solutions of the gap equation that enable a valid definition of <(q) over barq > in the presence of a nonzero current mass. The behavior of this condensate indicates that the essentially dynamical component of chiral symmetry breaking decreases with increasing current-quark mass.
C1 Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
   Minist Educ, Key Lab Heavy Ion Phys, Beijing 100871, Peoples R China.
   Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China.
   Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Chang, L (reprint author), Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
OI Roberts, Craig/0000-0002-2937-1361; Wright, Stewart/0000-0001-7391-8830
NR 49
TC 42
Z9 43
U1 1
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 JAN
PY 2007
VL 75
IS 1
AR 015201
DI 10.1103/PhysRevC.75.015201
PG 8
WC Physics, Nuclear
SC Physics
GA 131UN
UT WOS:000243896000047
ER

PT J
AU Davies, PJ
   Afanasjev, AV
   Wadsworth, R
   Andreoiu, C
   Austin, RAE
   Carpenter, MP
   Dashdorj, D
   Freeman, SJ
   Garrett, PE
   Gorgen, A
   Greene, J
   Jenkins, DG
   Johnston-Theasby, FL
   Joshi, P
   Macchiavelli, AO
   Moore, F
   Mukherjee, G
   Reviol, W
   Sarantites, D
   Seweryniak, D
   Smith, MB
   Svensson, CE
   Valiente-Dobon, JJ
   Ward, D
AF Davies, P. J.
   Afanasjev, A. V.
   Wadsworth, R.
   Andreoiu, C.
   Austin, R. A. E.
   Carpenter, M. P.
   Dashdorj, D.
   Freeman, S. J.
   Garrett, P. E.
   Gorgen, A.
   Greene, J.
   Jenkins, D. G.
   Johnston-Theasby, F. L.
   Joshi, P.
   Macchiavelli, A. O.
   Moore, F.
   Mukherjee, G.
   Reviol, W.
   Sarantites, D.
   Seweryniak, D.
   Smith, M. B.
   Svensson, C. E.
   Valiente-Dobon, J. J.
   Ward, D.
TI Identification of the G(/2)(9) proton and neutron band crossing in the N
   = Z nucleus Sr-76
SO PHYSICAL REVIEW C
LA English
DT Article
ID N=Z; REGION; GAMMASPHERE; MODEL
AB High-spin states in Sr-76 have been studied using Gammasphere plus Microball detector arrays. The known yrast band has been extended beyond the first band crossing, which involves the simultaneous alignment of pairs of g(9/2) protons and neutrons, to a tentative spin of 24h. The data are compared with the results of cranked relativistic mean-field (CRMF) and cranked relativistic Hartree-Bogoliubov (CRHB) calculations. The properties of the band, including the g(9/2) proton/neutron band crossing frequency and moments of inertia, are found to be well reproduced by the CRHB calculations. Furthermore, the unpaired CRMF calculations show quite good agreement with the data beyond the band crossing region, indicating that pairing is weak at these frequencies. The high spin results suggest that there is little evidence for an isoscalar (t=0) np pair field. Moreover, a systematic study of the band crossings in even-even N=Z nuclei for the first time reveals that there is no evidence to support the existence of the Coulomb antipairing effect caused by the Coulomb exchange term.
C1 Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.
   Mississippi State Univ, Dept Phys & Astron, Mississippi State, MS 39762 USA.
   Latvian State Univ, Lab Radiat Phys, Inst Solid State Phys, LV-2169 Salaspils, Latvia.
   Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada.
   Univ Liverpool, Oliver Lodge Lab, Liverpool L69 3BX, Merseyside, England.
   Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   N Carolina State Univ, Raleigh, NC 27695 USA.
   McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4K1, Canada.
   Univ Manchester, Sch Phys & Astron, Manchester M15 9PL, Lancs, England.
   TRIUMF, Vancouver, BC V6T 2A3, Canada.
   CEA Saclay, F-91191 Gif Sur Yvette, France.
   Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Washington Univ, Dept Chem, St Louis, MO 63130 USA.
RP Davies, PJ (reprint author), St Marys Univ, Halifax, NS B3H 3C3, Canada.
RI Freeman, Sean/B-1280-2010; Carpenter, Michael/E-4287-2015
OI Freeman, Sean/0000-0001-9773-4921; Carpenter,
   Michael/0000-0002-3237-5734
NR 24
TC 8
Z9 9
U1 0
U2 3
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 JAN
PY 2007
VL 75
IS 1
AR 011302
DI 10.1103/PhysRevB.75.011302
PG 5
WC Physics, Nuclear
SC Physics
GA 131UN
UT WOS:000243896000002
ER

PT J
AU Domingo-Pardo, C
   Abbondanno, U
   Aerts, G
   Alvarez-Pol, H
   Alvarez-Velarde, F
   Andriamonje, S
   Andrzejewski, J
   Assimakopoulos, P
   Audouin, L
   Badurek, G
   Baumann, P
   Becvar, F
   Berthoumieux, E
   Bisterzo, S
   Calvino, F
   Cano-Ott, D
   Capote, R
   Carrapico, C
   Cennini, P
   Chepel, V
   Chiaveri, E
   Colonna, N
   Cortes, G
   Couture, A
   Cox, J
   Dahlfors, M
   David, S
   Dillmann, I
   Dolfini, R
   Dridi, W
   Duran, I
   Eleftheriadis, C
   Embid-Segura, M
   Ferrant, L
   Ferrari, A
   Ferreira-Marques, R
   Fitzpatrick, L
   Frais-Koelbl, H
   Fujii, K
   Furman, W
   Gallino, R
   Goncalves, I
   Gonzalez-Romero, E
   Goverdovski, A
   Gramegna, F
   Griesmayer, E
   Guerrero, C
   Gunsing, F
   Haas, B
   Haight, R
   Heil, M
   Herrera-Martinez, A
   Igashira, M
   Isaev, S
   Jericha, E
   Kadi, Y
   Kappeler, F
   Karamanis, D
   Karadimos, D
   Kerveno, M
   Ketlerov, V
   Koehler, P
   Konovalov, V
   Kossionides, E
   Krticka, M
   Lamboudis, C
   Leeb, H
   Lindote, A
   Lopes, I
   Lozano, M
   Lukic, S
   Marganiec, J
   Marrone, S
   Mastinu, P
   Mengoni, A
   Milazzo, PM
   Moreau, C
   Mosconi, M
   Neves, F
   Oberhummer, H
   Oshima, M
   O'Brien, S
   Pancin, J
   Papachristodoulou, C
   Papadopoulos, C
   Paradela, C
   Patronis, N
   Pavlik, A
   Pavlopoulos, P
   Perrot, L
   Plag, R
   Plompen, A
   Plukis, A
   Poch, A
   Pretel, C
   Quesada, J
   Rauscher, T
   Reifarth, R
   Rosetti, M
   Rubbia, C
   Rudolf, G
   Rullhusen, P
   Salgado, J
   Sarchiapone, L
   Savvidis, I
   Stephan, C
   Tagliente, G
   Tain, JL
   Tassan-Got, L
   Tavora, L
   Terlizzi, R
   Vannini, G
   Vaz, P
   Ventura, A
   Villamarin, D
   Vincente, MC
   Vlachoudis, V
   Vlastou, R
   Voss, F
   Walter, S
   Wendler, H
   Wiescher, M
   Wisshak, K
AF Domingo-Pardo, C.
   Abbondanno, U.
   Aerts, G.
   Alvarez-Pol, H.
   Alvarez-Velarde, F.
   Andriamonje, S.
   Andrzejewski, J.
   Assimakopoulos, P.
   Audouin, L.
   Badurek, G.
   Baumann, P.
   Becvar, F.
   Berthoumieux, E.
   Bisterzo, S.
   Calvino, F.
   Cano-Ott, D.
   Capote, R.
   Carrapico, C.
   Cennini, P.
   Chepel, V.
   Chiaveri, E.
   Colonna, N.
   Cortes, G.
   Couture, A.
   Cox, J.
   Dahlfors, M.
   David, S.
   Dillmann, I.
   Dolfini, R.
   Dridi, W.
   Duran, I.
   Eleftheriadis, C.
   Embid-Segura, M.
   Ferrant, L.
   Ferrari, A.
   Ferreira-Marques, R.
   Fitzpatrick, L.
   Frais-Koelbl, H.
   Fujii, K.
   Furman, W.
   Gallino, R.
   Goncalves, I.
   Gonzalez-Romero, E.
   Goverdovski, A.
   Gramegna, F.
   Griesmayer, E.
   Guerrero, C.
   Gunsing, F.
   Haas, B.
   Haight, R.
   Heil, M.
   Herrera-Martinez, A.
   Igashira, M.
   Isaev, S.
   Jericha, E.
   Kadi, Y.
   Kaeppeler, F.
   Karamanis, D.
   Karadimos, D.
   Kerveno, M.
   Ketlerov, V.
   Koehler, P.
   Konovalov, V.
   Kossionides, E.
   Krticka, M.
   Lamboudis, C.
   Leeb, H.
   Lindote, A.
   Lopes, I.
   Lozano, M.
   Lukic, S.
   Marganiec, J.
   Marrone, S.
   Mastinu, P.
   Mengoni, A.
   Milazzo, P. M.
   Moreau, C.
   Mosconi, M.
   Neves, F.
   Oberhummer, H.
   Oshima, M.
   O'Brien, S.
   Pancin, J.
   Papachristodoulou, C.
   Papadopoulos, C.
   Paradela, C.
   Patronis, N.
   Pavlik, A.
   Pavlopoulos, P.
   Perrot, L.
   Plag, R.
   Plompen, A.
   Plukis, A.
   Poch, A.
   Pretel, C.
   Quesada, J.
   Rauscher, T.
   Reifarth, R.
   Rosetti, M.
   Rubbia, C.
   Rudolf, G.
   Rullhusen, P.
   Salgado, J.
   Sarchiapone, L.
   Savvidis, I.
   Stephan, C.
   Tagliente, G.
   Tain, J. L.
   Tassan-Got, L.
   Tavora, L.
   Terlizzi, R.
   Vannini, G.
   Vaz, P.
   Ventura, A.
   Villamarin, D.
   Vincente, M. C.
   Vlachoudis, V.
   Vlastou, R.
   Voss, F.
   Walter, S.
   Wendler, H.
   Wiescher, M.
   Wisshak, K.
CA n-TOF Collaboration
TI Measurement of the neutron capture cross section of the s-only isotope
   Pb-204 from 1 eV to 440 keV
SO PHYSICAL REVIEW C
LA English
DT Article
ID GALACTIC CHEMICAL EVOLUTION; GIANT BRANCH STARS; R-PROCESS;
   CHRONOMETERS; ABUNDANCES; ELEMENTS; NUCLEOSYNTHESIS; SOLAR; CERN; LEAD
AB The neutron capture cross section of Pb-204 has been measured at the CERN n_TOF installation with high resolution in the energy range from 1 eV to 440 keV. An R-matrix analysis of the resolved resonance region, between 1 eV and 100 keV, was carried out using the SAMMY code. In the interval between 100 keV and 440 keV we report the average capture cross section. The background in the entire neutron energy range was reliably determined from the measurement of a Pb-208 sample. Other systematic effects in this measurement were investigated and precisely corrected by means of detailed Monte Carlo simulations. We obtain a Maxwellian average capture cross section for Pb-204 at kT=30 keV of 79(3) mb, in agreement with previous experiments. However our cross section at kT=5 keV is about 35% larger than the values reported so far. The implications of the new cross section for the s-process abundance contributions in the Pb/Bi region are discussed.
C1 Forschungszentrum Karlsruhe GmbH, FZK, Inst Kernphys, Karlsruhe, Germany.
   Univ Valencia, CSIC, Inst Fis Corpuscular, Valencia, Spain.
   Ist Nazl Fis Nucl, Trieste, Italy.
   CEA Saclay, DSM, F-91191 Gif Sur Yvette, France.
   Univ Santiago de Compostela, Santiago De Compostela, Spain.
   Ctr Invest Energet Medioambientales & Technol, Madrid, Spain.
   Univ Lodz, PL-90131 Lodz, Poland.
   Univ Ioannina, GR-45110 Ioannina, Greece.
   Tech Univ Vienna, Atominst, A-1060 Vienna, Austria.
   CNRS, IN2P3, IReS, Strasbourg, France.
   Charles Univ Prague, Prague, Czech Republic.
   Univ Turin, Dipartimento Fis Gen, Turin, Italy.
   Univ Politecn Catalunya, Barcelona, Spain.
   IAEA, NAPC, Nucl Data Sect, A-1400 Vienna, Austria.
   Univ Seville, Seville, Spain.
   ITN, Lisbon, Portugal.
   CERN, CH-1211 Geneva 23, Switzerland.
   Univ Coimbra, LIP Coimbra, Coimbra, Portugal.
   Univ Coimbra, Dept Fis, P-3000 Coimbra, Portugal.
   Ist Nazl Fis Nucl, I-70126 Bari, Italy.
   Univ Notre Dame, Notre Dame, IN 46556 USA.
   CNRS, IN2P3, IPN, F-91405 Orsay, France.
   Univ Pavia, I-27100 Pavia, Italy.
   Aristotle Univ Thessaloniki, GR-54006 Thessaloniki, Greece.
   Fachhsch Wiener Neustadt, Wiener Neustadt, Austria.
   Joint Inst Nucl Res, Frank Lab Neutron Phys, Dubna, Russia.
   Inst Phys & Power Engn, Obninsk, Russia.
   Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy.
   CNRS, IN2P3, CENBG, F-33077 Bordeaux, France.
   Los Alamos Natl Lab, Los Alamos, NM USA.
   Tokyo Inst Technol, Tokyo 152, Japan.
   Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
   NCSR, Athens, Greece.
   Japan Atom Energy Res Inst, Tokai, Ibaraki 31911, Japan.
   Natl Tech Univ Athens, Athens, Greece.
   Univ Vienna, Inst Isotopenforsch & Kernphys, Vienna, Austria.
   IRMM, JRC, CEC, Geel, Belgium.
   Univ Basel, Dept Phys & Astron, Basel, Switzerland.
   ENEA, Bologna, Italy.
   Univ Bologna, Dipartmento Fis, Bologna, Italy.
   Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy.
RP Domingo-Pardo, C (reprint author), Forschungszentrum Karlsruhe GmbH, FZK, Inst Kernphys, Karlsruhe, Germany.
RI Guerrero, Carlos/L-3251-2014; Gonzalez Romero, Enrique/L-7561-2014;
   Pretel Sanchez, Carme/L-8287-2014; Capote Noy, Roberto/M-1245-2014;
   Duran, Ignacio/H-7254-2015; Alvarez Pol, Hector/F-1930-2011; Paradela,
   Carlos/J-1492-2012; Gramegna, Fabiana/B-1377-2012; Denisenko,
   Yulia/L-2292-2015; Calvino, Francisco/K-5743-2014; Mengoni,
   Alberto/I-1497-2012; Lindote, Alexandre/H-4437-2013; Neves,
   Francisco/H-4744-2013; Patronis, Nikolaos/A-3836-2008; Rauscher,
   Thomas/D-2086-2009; Jericha, Erwin/A-4094-2011; Vaz, Pedro/K-2464-2013;
   Lopes, Isabel/A-1806-2014; Tain, Jose L./K-2492-2014; Cano Ott,
   Daniel/K-4945-2014; Quesada Molina, Jose Manuel/K-5267-2014; Ventura,
   Alberto/B-9584-2011
OI Guerrero, Carlos/0000-0002-2111-546X; Gonzalez Romero,
   Enrique/0000-0003-2376-8920; Capote Noy, Roberto/0000-0002-1799-3438;
   Alvarez Pol, Hector/0000-0001-9643-6252; Gramegna,
   Fabiana/0000-0001-6112-0602; Denisenko, Yulia/0000-0003-4130-8899;
   Calvino, Francisco/0000-0002-7198-4639; Mengoni,
   Alberto/0000-0002-2537-0038; Domingo-Pardo, Cesar/0000-0002-2915-5466;
   Lindote, Alexandre/0000-0002-7965-807X; Neves,
   Francisco/0000-0003-3635-1083; Rauscher, Thomas/0000-0002-1266-0642;
   Jericha, Erwin/0000-0002-8663-0526; Vaz, Pedro/0000-0002-7186-2359;
   Lopes, Isabel/0000-0003-0419-903X; Cano Ott, Daniel/0000-0002-9568-7508;
   Quesada Molina, Jose Manuel/0000-0002-2038-2814; Ventura,
   Alberto/0000-0001-6748-7931
NR 28
TC 25
Z9 25
U1 1
U2 17
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 JAN
PY 2007
VL 75
IS 1
AR 015806
DI 10.1103/PhysRevC.75.015806
PG 9
WC Physics, Nuclear
SC Physics
GA 131UN
UT WOS:000243896000061
ER

PT J
AU Garrett, PE
   Lenzi, SM
   Algin, E
   Appelbe, D
   Bauer, RW
   Becker, JA
   Bernstein, LA
   Cameron, JA
   Carpenter, MP
   Janssens, RVF
   Lister, CJ
   Seweryniak, D
   Warner, DD
AF Garrett, P. E.
   Lenzi, S. M.
   Algin, E.
   Appelbe, D.
   Bauer, R. W.
   Becker, J. A.
   Bernstein, L. A.
   Cameron, J. A.
   Carpenter, M. P.
   Janssens, R. V. F.
   Lister, C. J.
   Seweryniak, D.
   Warner, D. D.
TI Spectroscopy of the N = Z-2 nucleus Cr-46 and mirror energy differences
SO PHYSICAL REVIEW C
LA English
DT Article
ID F(7/2) SHELL; STATES
AB Excited states in Cr-46 were sought using the C-12(Ar-36,2n) reaction. Gamma rays were detected with the Gammasphere array, and the Z value of the reaction products was determined with an ionization chamber located at the focal plane of the Fragment Mass Analyzer. In addition to the ground-state band observed up to I-pi=10(+) (tentatively 12(+)), five states are proposed to belong to the 3(-) band. The mirror energy differences with the analog states in Ti-46 present a pronounced staggering effect between the odd and even spin members that is reproduced well by shell-model calculations incorporating the different Coulomb contributions, monopole, multipole, and single-particle effects together with an isospin-nonconserving interaction that accounts for the so-called J=2 anomaly. Dramatically different E1 decay patterns for members of the 3(-) band between the Cr-46 and Ti-46 mirrors are also observed.
C1 Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada.
   Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
   Ist Nazl Fis Nucl, Padua, Italy.
   Dipartimento Fis, Padua, Italy.
   Eskisehir Osmangazi Univ, Dept Phys, TR-26480 Meselik, Eskisehir, Turkey.
   McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada.
   Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   CLRC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England.
RP Garrett, PE (reprint author), Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada.
RI Lenzi, Silvia/I-6750-2012; Carpenter, Michael/E-4287-2015
OI Carpenter, Michael/0000-0002-3237-5734
NR 29
TC 8
Z9 8
U1 1
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9985
EI 2469-9993
J9 PHYS REV C
JI Phys. Rev. C
PD JAN
PY 2007
VL 75
IS 1
AR 014307
DI 10.1103/PhysRevC.75.014307
PG 9
WC Physics, Nuclear
SC Physics
GA 131UN
UT WOS:000243896000024
ER

PT J
AU Greene, GL
   Gudkov, V
AF Greene, Geoffrey L.
   Gudkov, Vladimir
TI Neutron interferometric method to provide improved constraints on
   non-Newtonian gravity at the nanometer scale
SO PHYSICAL REVIEW C
LA English
DT Article
ID EARTHS GRAVITATIONAL-FIELD; QUANTUM STATES; DIMENSIONS; MILLIMETER;
   ENERGY
AB In recent years, an energetic experimental program has set quite stringent limits on a possible "non-1/r(2)" dependence on gravity at short length scales. This effort has been largely driven by the predictions of theories based on compactification of extra spatial dimensions. It is characteristic of many such theories that the strength and length scales of such anomalous gravity are not clearly determined from first principles. As a result, it is productive to extend the current limits the range and strength of such hypothetical interactions. As a heavy, neutral, and (almost) stable particle, the neutron provides an ideal probe for the study of such hypothetical interactions at very short range. In this work, we describe methods based on neutron interferometry which have the capability to provide improved sensitivity non-Newtonian forces down to length scales at and below an nanometer.
C1 Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
   Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA.
RP Greene, GL (reprint author), Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA.
NR 21
TC 18
Z9 18
U1 1
U2 5
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 JAN
PY 2007
VL 75
IS 1
AR 015501
DI 10.1103/PhysRevC.75.015501
PG 6
WC Physics, Nuclear
SC Physics
GA 131UN
UT WOS:000243896000055
ER

PT J
AU Jiang, CL
   Rehm, KE
   Back, BB
   Janssens, RVF
AF Jiang, C. L.
   Rehm, K. E.
   Back, B. B.
   Janssens, R. V. F.
TI Expectations for C-12 and O-16 induced fusion cross sections at energies
   of astrophysical interest
SO PHYSICAL REVIEW C
LA English
DT Article
ID SUB-BARRIER FUSION; OR-EQUAL-TO; C-12&C-12 REACTION; SUBCOULOMB
   ENERGIES; O-16&O-16 REACTIONS; ELASTIC-SCATTERING; NUCLEAR-REACTIONS;
   COULOMB BARRIER; REACTION-RATES; DEFORMATIONS
AB The extrapolations of cross sections for fusion reactions involving C-12 and O-16 nuclei down to energies relevant for explosive stellar burning have been reexamined. Based on a systematic study of fusion in heavier systems, it is expected that a suppression of the fusion process will also be present in these light heavy-ion systems at extreme sub-barrier energies due to the saturation properties of nuclear matter. Previous phenomenological extrapolations of the S factor for light heavy-ion fusion based on optical model calculations may therefore have overestimated the corresponding reaction rates. A new "recipe" is proposed to extrapolate S factors for light heavy-ion reactions to low energies taking the hindrance behavior into account. It is based on a fit to the logarithmic derivative of the experimental cross section which is much less sensitive to overall normalization discrepancies between different data sets than other approaches. This method, therefore, represents a significant improvement over other extrapolations. The impact on the astrophysical reaction rates is discussed.
C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Jiang, CL (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
NR 49
TC 65
Z9 65
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 JAN
PY 2007
VL 75
IS 1
AR 015803
DI 10.1103/PhysRevC.75.015803
PG 11
WC Physics, Nuclear
SC Physics
GA 131UN
UT WOS:000243896000058
ER

PT J
AU Julia-Diaz, B
   Lee, TSH
   Sato, T
   Smith, LC
AF Julia-Diaz, B.
   Lee, T. -S. H.
   Sato, T.
   Smith, L. C.
TI Extraction and interpretation of gamma N -> Delta form factors within a
   dynamical model
SO PHYSICAL REVIEW C
LA English
DT Article
ID HIGH-MOMENTUM-TRANSFER; DELTA(1232) RESONANCE; BAG MODEL;
   ELECTROPRODUCTION; NUCLEON; GAMMA; P((E)OVER-RIGHT-ARROW; TRANSITION;
   SCATTERING; FRAMEWORK
AB Within the dynamical model of Refs. [Phys. Rev. C 54, 2660 (1996); 63, 055201 (2001)], we perform an analysis of recent data of pion electroproduction reactions at energies near the Delta(1232) resonance. We discuss possible interpretations of the extracted bare and dressed gamma N ->Delta form factors in terms of relativistic constituent quark models and lattice quantum chromodynamics calculations. Possible future developments are discussed.
C1 Thomas Jefferson Natl Accelerator Facil, Excited Baryon Anal Ctr, Newport News, VA 22901 USA.
   Univ Barcelona, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain.
   Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   Osaka Univ, Dept Phys, Toyonaka, Osaka 5600043, Japan.
   Univ Virginia, Dept Phys, Charlottesville, VA 22901 USA.
RP Julia-Diaz, B (reprint author), Thomas Jefferson Natl Accelerator Facil, Excited Baryon Anal Ctr, Newport News, VA 22901 USA.
RI Julia-Diaz, Bruno/E-5825-2010
OI Julia-Diaz, Bruno/0000-0002-0145-6734
NR 50
TC 57
Z9 57
U1 0
U2 2
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 JAN
PY 2007
VL 75
IS 1
AR 015205
DI 10.1103/PhysRevC.75.015205
PG 10
WC Physics, Nuclear
SC Physics
GA 131UN
UT WOS:000243896000051
ER

PT J
AU Laget, JM
AF Laget, J. M.
TI Pentaquark, cusp, and rescattering in single kaon photoproduction off
   deuterium
SO PHYSICAL REVIEW C
LA English
DT Article
ID EXCHANGE-POTENTIAL APPROACH; BARYON-BARYON SCATTERING; PHASE-SHIFT
   ANALYSIS; NUCLEON-NUCLEON; HIGH-ENERGIES; BODY SYSTEMS; GEV/C; PION
AB In very well-defined parts of the phase space, KN and Lambda N rescattering depend on on-shell elementary matrix elements and on the low momentum components of the deuteron wave function. This provides us with the unique opportunity to study details in the scattering amplitudes that may have escaped the analysis of reactions induced on a nucleon target by kaon and hyperon beams at low energies. When folded with a typical experimental mass resolution, a narrow state with a width of 1 MeV would contribute by no more than 10% to the KN mass spectrum. On the contrary, a cusp would be easily detected near the Sigma production threshold in the Lambda N mass spectrum.
C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
RP Laget, JM (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
NR 31
TC 7
Z9 7
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9985
EI 2469-9993
J9 PHYS REV C
JI Phys. Rev. C
PD JAN
PY 2007
VL 75
IS 1
AR 014002
DI 10.1103/PhysRevC.75.014002
PG 7
WC Physics, Nuclear
SC Physics
GA 131UN
UT WOS:000243896000011
ER

PT J
AU Lalakulich, O
   Melnitchouk, W
   Paschos, EA
AF Lalakulich, O.
   Melnitchouk, W.
   Paschos, E. A.
TI Quark-hadron duality in neutrino scattering
SO PHYSICAL REVIEW C
LA English
DT Article
ID SUM RULES; NUCLEON RESONANCES; LOCAL DUALITY; RENORMALIZATION; BEHAVIOR;
   REGION; PROTON
AB We present a phenomenological model of the quark-hadron transition in neutrino-nucleon scattering. Using recently extracted weak nucleon transition form factors, we investigate the extent to which local and global quark-hadron duality is applicable in the neutrino F-1,F-2, and F-3 structure functions and contrast this with duality in electron scattering. Our findings suggest that duality works relatively well for neutrino-nucleon scattering for the F-2 and F-3 structure functions but not as well for F-1. We also calculate the quasielastic, resonance, and deep inelastic contributions to the Adler sum rule and find it to be satisfied to within 10% for 0.5 less than or similar to Q(2)less than or similar to 2 GeV2.
C1 Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany.
   Jefferson Lab, Newport News, VA 23606 USA.
RP Lalakulich, O (reprint author), Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany.
NR 51
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 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD JAN
PY 2007
VL 75
IS 1
AR 015202
DI 10.1103/PhysRevC.75.015202
PG 10
WC Physics, Nuclear
SC Physics
GA 131UN
UT WOS:000243896000048
ER

PT J
AU Oyamatsu, K
   Iida, K
AF Oyamatsu, Kazuhiro
   Iida, Kei
TI Symmetry energy at subnuclear densities and nuclei in neutron star
   crusts
SO PHYSICAL REVIEW C
LA English
DT Article
ID INTERACTION CROSS-SECTIONS; INNER CRUST; UNSTABLE NUCLEI; MATTER; RADII;
   COLD; SATURATION; EQUATION; SHAPE; PASTA
AB We examine how the properties of inhomogeneous nuclear matter at subnuclear densities depend on the density dependence of the symmetry energy. Using a macroscopic nuclear model we calculate the size and shape of nuclei in neutron star matter at zero temperature in a way dependent on the density dependence of the symmetry energy. We find that for smaller symmetry energy at subnuclear densities, corresponding to the larger density symmetry coefficient L, the charge number of nuclei is smaller and the critical density at which matter with nuclei or bubbles becomes uniform is lower. The decrease in the charge number is associated with the dependence of the surface tension on the nuclear density and the density of a sea of neutrons, whereas the decrease in the critical density can be generally understood in terms of proton clustering instability in uniform matter.
C1 Aichi Skukutoku Univ, Dept Media Theories & Prod, Nagakute, Aichi 4801197, Japan.
   RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan.
   Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA.
   Kochi Univ, Dept Mat Sci, Kochi 7808520, Japan.
RP Oyamatsu, K (reprint author), Aichi Skukutoku Univ, Dept Media Theories & Prod, Nagakute, Aichi 4801197, Japan.
NR 39
TC 87
Z9 87
U1 0
U2 2
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 JAN
PY 2007
VL 75
IS 1
AR 015801
DI 10.1103/PhysRevC.75.015801
PG 10
WC Physics, Nuclear
SC Physics
GA 131UN
UT WOS:000243896000056
ER

PT J
AU Papenbrock, T
   Bhattacharyya, A
AF Papenbrock, T.
   Bhattacharyya, Anirban
TI Density-functional theory for the pairing Hamiltonian
SO PHYSICAL REVIEW C
LA English
DT Article
ID HARTREE-FOCK CALCULATIONS; SENIORITY-ZERO STATES; SKYRMES INTERACTION;
   NUCLEI; SYSTEMS; MODELS; CHARGE; NUMBER
AB We consider the pairing Hamiltonian and systematically construct its density functional in the strong-coupling limit and in the limit of large particle numbers. In the former limit, the functional is an expansion into central moments of occupation numbers. In the latter limit, the functional is known from BCS theory. Both functionals are nonlocal in structure, and the nonlocalities are in the form of simple products of local functionals. We also derive the relation between the occupation numbers and the Kohn-Sham density.
C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RP Papenbrock, T (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
OI Bhattacharyya, Anirban/0000-0002-5948-3364; Papenbrock,
   Thomas/0000-0001-8733-2849
NR 46
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 0556-2813
EI 1089-490X
J9 PHYS REV C
JI Phys. Rev. C
PD JAN
PY 2007
VL 75
IS 1
AR 014304
DI 10.1103/PhysRevC.75.014304
PG 7
WC Physics, Nuclear
SC Physics
GA 131UN
UT WOS:000243896000021
ER

PT J
AU Paul, ES
   Starosta, K
   Evans, AO
   Boston, AJ
   Chantler, HJ
   Chiara, CJ
   Devlin, M
   Fletcher, AM
   Fossan, DB
   LaFosse, DR
   Lane, GJ
   Lee, IY
   Macchiavelli, AO
   Nolan, PJ
   Sarantites, DG
   Sears, JM
   Semple, AT
   Smith, JF
   Vaman, C
   Afanasjev, AV
   Ragnarsson, I
AF Paul, E. S.
   Starosta, K.
   Evans, A. O.
   Boston, A. J.
   Chantler, H. J.
   Chiara, C. J.
   Devlin, M.
   Fletcher, A. M.
   Fossan, D. B.
   LaFosse, D. R.
   Lane, G. J.
   Lee, I. Y.
   Macchiavelli, A. O.
   Nolan, P. J.
   Sarantites, D. G.
   Sears, J. M.
   Semple, A. T.
   Smith, J. F.
   Vaman, C.
   Afanasjev, A. V.
   Ragnarsson, I.
TI Smooth terminating bands in Te-112: Particle-hole induced collectivity
SO PHYSICAL REVIEW C
LA English
DT Article
ID COINCIDENCE DATA SETS; ROTATIONAL BANDS; HIGH-SPIN; MASS REGION;
   GAMMASPHERE; MICROBALL; STATES
AB The Gammasphere spectrometer, in conjunction with the Microball charged-particle array, was used to investigate high-spin states in Te-112 via Ni-58(Ni-58, 4p gamma) reactions at 240 and 250 MeV. Several smooth terminating bands were established, and lifetime measurements were performed for the strongest one using the Doppler-shift attenuation method. Results obtained in the spin range 18-32h yield a transition quadrupole moment of 4.0 +/- 0.5eb, which corresponds to a quadrupole deformation epsilon(2)=0.26 +/- 0.03; this value is significantly larger than the ground-state deformation of tellurium isotopes. It was also possible to extract a transition quadrupole moment for the yrast band in Xe-114, produced via the 58Ni (58Ni, 2p gamma) reaction. A value of 3.0 +/- 0.5eb was found in the spin range 16-24h, which corresponds to a quadrupole deformation epsilon(2)=0.19 +/- 0.03. Cranked Nilsson-Strutinsky calculations are used to interpret the results.
C1 Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.
   SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
   Washington Univ, Dept Chem, St Louis, MO 63130 USA.
   Univ Manchester, Schuster Lab, Manchester M13 9PL, Lancs, England.
   Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
   Mississippi State Univ, Dept Phys & Astron, Mississippi State, MS 39762 USA.
   Lund Inst Technol, Dept Math Phys, S-22100 Lund, Sweden.
   Latvian State Univ, Lab Radiat Phys, Inst Solid State Phys, LV-2169 Salaspils, Latvia.
RP Paul, ES (reprint author), Michigan State Univ, Natl Semicond Cyclotron Lab, E Lansing, MI 48824 USA.
RI Lane, Gregory/A-7570-2011; Devlin, Matthew/B-5089-2013
OI Lane, Gregory/0000-0003-2244-182X; Devlin, Matthew/0000-0002-6948-2154
NR 27
TC 5
Z9 5
U1 0
U2 3
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 JAN
PY 2007
VL 75
IS 1
AR 014308
DI 10.1103/PhysRevC.75.014308
PG 10
WC Physics, Nuclear
SC Physics
GA 131UN
UT WOS:000243896000025
ER

PT J
AU Souliotis, GA
   Botvina, AS
   Shetty, DV
   Keksis, AL
   Jandel, M
   Veselsky, M
   Yennello, SJ
AF Souliotis, G. A.
   Botvina, A. S.
   Shetty, D. V.
   Keksis, A. L.
   Jandel, M.
   Veselsky, M.
   Yennello, S. J.
TI Tracing the evolution of the symmetry energy of hot nuclear fragments
   from the compound nucleus towards multifragmentation
SO PHYSICAL REVIEW C
LA English
DT Article
ID PHASE-TRANSITION; NEUTRON-STARS; MATTER; CLUSTERS; ISOSPIN; PHYSICS;
   PROBE
AB The evolution of the symmetry energy coefficient of the binding energy of hot fragments with increasing excitation is explored in multifragmentation processes following heavy-ion collisions below the Fermi energy. In this work, high-resolution mass spectrometric data on isotopic distributions of projectile-like fragments are systematically compared to calculations involving the statistical multifragmentation model (SMM). Within the SMM picture, the present study suggests a gradual decrease of the symmetry energy coefficient of the hot primary fragments from 25 MeV at the compound nucleus regime towards 15 MeV in the multifragmentation regime. The isotopic distributions of the hot primary fragments are found to be very wide and extend towards the neutron drip line. These findings are expected to have important implications in the modeling of the composition and the evolution of hot and dense astrophysical environments, such as those of core-collapse supernova.
C1 Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA.
   Russian Acad Sci, Inst Nucl Res, RU-117312 Moscow, Russia.
RP Souliotis, GA (reprint author), Los Alamos Natl Lab, CINC, Los Alamos, NM 87545 USA.
RI Yennello, Sherry/B-5803-2015
OI Yennello, Sherry/0000-0003-3963-5217
NR 35
TC 44
Z9 44
U1 1
U2 2
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 JAN
PY 2007
VL 75
IS 1
AR 011601
DI 10.1103/PhysRevB.75.011601
PG 5
WC Physics, Nuclear
SC Physics
GA 131UN
UT WOS:000243896000003
ER

PT J
AU Abouzaid, E
   Arenton, M
   Barker, AR
   Bellantoni, L
   Bellavance, A
   Blucher, E
   Bock, GJ
   Cheu, E
   Coleman, R
   Corcoran, MD
   Cox, B
   Erwin, AR
   Escobar, CO
   Glazov, A
   Golossanov, A
   Gomes, RA
   Gouffon, P
   Hanagaki, K
   Hsiung, YB
   Huang, H
   Jensen, DA
   Kessler, R
   Kotera, K
   Ledovskoy, A
   McBride, PL
   Monnier, E
   Nelson, KS
   Nguyen, H
   Niclasen, R
   Phillips, DG
   Ping, H
   Qi, XR
   Ramberg, EJ
   Ray, RE
   Ronquest, M
   Santos, E
   Shields, J
   Slater, W
   Smith, D
   Solomey, N
   Swallow, EC
   Toale, PA
   Tschirhart, R
   Velissaris, C
   Wah, YW
   Wang, J
   White, HB
   Whitmore, J
   Wilking, MJ
   Winstein, B
   Winston, R
   Worcester, ET
   Worcester, M
   Yamanaka, T
   Zimmerman, ED
   Zukanovich, RF
AF Abouzaid, E.
   Arenton, M.
   Barker, A. R.
   Bellantoni, L.
   Bellavance, A.
   Blucher, E.
   Bock, G. J.
   Cheu, E.
   Coleman, R.
   Corcoran, M. D.
   Cox, B.
   Erwin, A. R.
   Escobar, C. O.
   Glazov, A.
   Golossanov, A.
   Gomes, R. A.
   Gouffon, P.
   Hanagaki, K.
   Hsiung, Y. B.
   Huang, H.
   Jensen, D. A.
   Kessler, R.
   Kotera, K.
   Ledovskoy, A.
   McBride, P. L.
   Monnier, E.
   Nelson, K. S.
   Nguyen, H.
   Niclasen, R.
   Phillips, D. G., II
   Ping, H.
   Qi, X. R.
   Ramberg, E. J.
   Ray, R. E.
   Ronquest, M.
   Santos, E.
   Shields, J.
   Slater, W.
   Smith, D.
   Solomey, N.
   Swallow, E. C.
   Toale, P. A.
   Tschirhart, R.
   Velissaris, C.
   Wah, Y. W.
   Wang, J.
   White, H. B.
   Whitmore, J.
   Wilking, M. J.
   Winstein, B.
   Winston, R.
   Worcester, E. T.
   Worcester, M.
   Yamanaka, T.
   Zimmerman, E. D.
   Zukanovich, R. F.
TI Measurement of the rare decay pi(0)-> e(+)e(-)
SO PHYSICAL REVIEW D
LA English
DT Article
ID BRANCHING RATIO; RADIATIVE-CORRECTIONS; PI(0)->E(+)E(-); PI-0->E+E;
   FLIGHT
AB The branching ratio of the rare decay pi(0)-> e(+)e(-) has been measured precisely, using the complete data set from the KTeV E799-II experiment at Fermilab. We observe 794 candidate pi(0)-> e(+)e(-) events using K-L -> 3 pi(0) as a source of tagged pi(0)s. The expected background is 52.7 +/- 11.2 events, predominantly from high e(+)e(-) mass pi(0)-> e(+)e(-)gamma decays. We have measured B(pi(0)-> e(+)e(-),(m(e)(+)e(-)/m(pi)(0))(2)> 0.95)=(6.44 +/- 0.25(stat)+/- 0.22(syst))x10(-8), which is above the unitary bound from pi(0)->gamma gamma and within the range of theoretical expectations from the standard model.
C1 Univ Colorado, Boulder, CO 80309 USA.
   Univ Arizona, Tucson, AZ 85721 USA.
   Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
   Univ Estadual Campinas, BR-13083970 Campinas, SP, Brazil.
   Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
   Elmhurst Coll, Elmhurst, IL 60126 USA.
   Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   Osaka Univ, Toyonaka, Osaka 5600043, Japan.
   Rice Univ, Houston, TX 77005 USA.
   Univ Sao Paulo, BR-05315970 Sao Paulo, Brazil.
   Univ Virginia, Dept Phys, Charlottesville, VA 22901 USA.
   Univ Virginia, Inst Nucl & Particle Phys, Charlottesville, VA 22901 USA.
   Univ Wisconsin, Madison, WI 53706 USA.
RP Zimmerman, ED (reprint author), Univ Colorado, Boulder, CO 80309 USA.
EM edz@colorado.edu
RI Gomes, Ricardo/B-6899-2008; Zukanovich Funchal, Renata/C-5829-2013;
   Moura Santos, Edivaldo/K-5313-2016; Gouffon, Philippe/I-4549-2012; Inst.
   of Physics, Gleb Wataghin/A-9780-2017; 
OI Gomes, Ricardo/0000-0003-0278-4876; Zukanovich Funchal,
   Renata/0000-0001-6749-0022; Moura Santos, Edivaldo/0000-0002-2818-8813;
   Gouffon, Philippe/0000-0001-7511-4115; HSIUNG, YEE/0000-0003-4801-1238
NR 18
TC 47
Z9 51
U1 0
U2 5
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 JAN
PY 2007
VL 75
IS 1
AR 012004
DI 10.1103/PhysRevD.75.012004
PG 6
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200011
ER

PT J
AU Abouzaid, E
   Alavi-Harati, A
   Alexopoulos, T
   Arenton, M
   Barker, AR
   Bellantoni, L
   Bellavance, A
   Blucher, E
   Bock, GJ
   Bright, S
   Cheu, E
   Coleman, R
   Corcoran, MD
   Cox, B
   Erwin, AR
   Escobar, CO
   Ford, R
   Glazov, A
   Golossanov, A
   Gomes, RA
   Gouffon, P
   Hanagaki, K
   Hsiung, YB
   Huang, H
   Jensen, DA
   Kessler, R
   Kotera, K
   Ledovskoy, A
   McBride, PL
   Monnier, E
   Nelson, KS
   Nguyen, H
   Niclasen, R
   Ping, H
   Prasad, V
   Qi, XR
   Ramberg, EJ
   Ray, RE
   Ronquest, M
   Rooker, T
   Santos, E
   Shields, J
   Slater, W
   Smith, DE
   Solomey, N
   Swallow, EC
   Toale, PA
   Tschirhart, R
   Velissaris, C
   Wah, YW
   Wang, J
   White, HB
   Whitmore, J
   Wilking, M
   Winstein, B
   Winston, R
   Worcester, ET
   Worcester, M
   Yamanaka, T
   Zimmerman, ED
   Zukanovich, RF
AF Abouzaid, E.
   Alavi-Harati, A.
   Alexopoulos, T.
   Arenton, M.
   Barker, A. R.
   Bellantoni, L.
   Bellavance, A.
   Blucher, E.
   Bock, G. J.
   Bright, S.
   Cheu, E.
   Coleman, R.
   Corcoran, M. D.
   Cox, B.
   Erwin, A. R.
   Escobar, C. O.
   Ford, R.
   Glazov, A.
   Golossanov, A.
   Gomes, R. A.
   Gouffon, P.
   Hanagaki, K.
   Hsiung, Y. B.
   Huang, H.
   Jensen, D. A.
   Kessler, R.
   Kotera, K.
   Ledovskoy, A.
   McBride, P. L.
   Monnier, E.
   Nelson, K. S.
   Nguyen, H.
   Niclasen, R.
   Ping, H.
   Prasad, V.
   Qi, X. R.
   Ramberg, E. J.
   Ray, R. E.
   Ronquest, M.
   Rooker, T.
   Santos, E.
   Shields, J.
   Slater, W.
   Smith, D. E.
   Solomey, N.
   Swallow, E. C.
   Toale, P. A.
   Tschirhart, R.
   Velissaris, C.
   Wah, Y. W.
   Wang, J.
   White, H. B.
   Whitmore, J.
   Wilking, M.
   Winstein, B.
   Winston, R.
   Worcester, E. T.
   Worcester, M.
   Yamanaka, T.
   Zimmerman, E. D.
   Zukanovich, R. F.
TI Xi(0) and (Xi)over-bar(0) polarization measurements at 800 GeV/c
SO PHYSICAL REVIEW D
LA English
DT Article
ID INCLUSIVE PRODUCTION; 800-GEV/C PROTONS; LAMBDA
AB The polarization of Xi(0) and Xi(0) hyperons produced by 800 GeV/c protons on a BeO target at a fixed targeting angle of 4.8 mrad is measured by the KTeV experiment at Fermilab. Our result of 9.7% for Xi(0) polarization shows no significant energy dependence when compared to a result obtained at 400 GeV/c production energy and at twice our targeting angle. The polarization of the Xi(0) is measured for the first time and found to be consistent with zero. We also examine the dependence of polarization on production p(t).
C1 Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
   Univ Arizona, Tucson, AZ 85721 USA.
   Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
   Univ Estadual Campinas, BR-13083970 Campinas, SP, Brazil.
   Univ Colorado, Boulder, CO 80309 USA.
   Elmhurst Coll, Elmhurst, IL 60126 USA.
   Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   Osaka Univ, Toyonaka, Osaka 560, Japan.
   Rice Univ, Houston, TX 77005 USA.
   Univ Sao Paulo, BR-05315970 Sao Paulo, Brazil.
   Univ Virginia, Dept Phys, Charlottesville, VA 22901 USA.
   Univ Virginia, Inst Nucl & Particle Phys, Charlottesville, VA 22901 USA.
   Univ Wisconsin, Madison, WI 53706 USA.
RP Abouzaid, E (reprint author), Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
EM talexopo@cern.ch
RI Gomes, Ricardo/B-6899-2008; Zukanovich Funchal, Renata/C-5829-2013;
   Moura Santos, Edivaldo/K-5313-2016; Gouffon, Philippe/I-4549-2012; Inst.
   of Physics, Gleb Wataghin/A-9780-2017
OI Gomes, Ricardo/0000-0003-0278-4876; Zukanovich Funchal,
   Renata/0000-0001-6749-0022; Moura Santos, Edivaldo/0000-0002-2818-8813;
   Gouffon, Philippe/0000-0001-7511-4115; 
NR 15
TC 5
Z9 5
U1 0
U2 5
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 1
AR 012005
DI 10.1103/PhysRevD.75.012005
PG 5
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200012
ER

PT J
AU Abulencia, A
   Adelman, J
   Affolder, T
   Akimoto, T
   Albrow, MG
   Ambrose, D
   Amerio, S
   Amidei, D
   Anastassov, A
   Anikeev, K
   Annovi, A
   Antos, J
   Aoki, M
   Apollinari, G
   Arguin, JF
   Arisawa, T
   Artikov, A
   Ashmanskas, W
   Attal, A
   Azfar, F
   Azzi-Bacchetta, P
   Azzurri, P
   Bacchetta, N
   Badgett, W
   Barbaro-Galtieri, A
   Barnes, VE
   Barnett, BA
   Baroiant, S
   Bartsch, V
   Bauer, G
   Bedeschi, F
   Behari, S
   Belforte, S
   Bellettini, G
   Bellinger, J
   Belloni, A
   Benjamin, D
   Beretvas, A
   Beringer, J
   Berry, T
   Bhatti, A
   Binkley, M
   Bisello, D
   Blair, RE
   Blocker, C
   Blumenfeld, B
   Bocci, A
   Bodek, A
   Boisvert, V
   Bolla, G
   Bolshov, A
   Bortoletto, D
   Boudreau, J
   Boveia, A
   Brau, B
   Brigliadori, L
   Bromberg, C
   Brubaker, E
   Budagov, J
   Budd, HS
   Budd, S
   Budroni, S
   Burkett, K
   Busetto, G
   Bussey, P
   Byrum, KL
   Cabrera, S
   Campanelli, M
   Campbell, M
   Canelli, F
   Canepa, A
   Carillo, S
   Carlsmith, D
   Carosi, R
   Casarsa, M
   Castro, A
   Catastini, P
   Cauz, D
   Cavalli-Sforza, M
   Cerri, A
   Cerrito, L
   Chang, SH
   Chen, YC
   Chertok, M
   Chiarelli, G
   Chlachidze, G
   Chlebana, F
   Cho, I
   Cho, K
   Chokheli, D
   Chou, JP
   Choudalakis, G
   Chuang, SH
   Chung, K
   Chung, WH
   Chung, YS
   Ciljak, M
   Ciobanu, CI
   Ciocci, MA
   Clark, A
   Clark, D
   Coca, M
   Compostella, G
   Convery, ME
   Conway, J
   Cooper, B
   Copic, K
   Cordelli, M
   Cortiana, G
   Crescioli, F
   Almenar, CC
   Cuevas, J
   Culbertson, R
   Cully, JC
   Cyr, D
   DaRonco, S
   Datta, M
   D'Auria, S
   Davies, T
   D'Onofrio, M
   Dagenhart, D
   de Barbaro, P
   De Cecco, S
   Deisher, A
   De Lentdecker, G
   Dell'Orso, M
   Paoli, FD
   Demortier, L
   Deng, J
   Deninno, M
   De Pedis, D
   Derwent, PF
   Di Giovanni, GP
   Dionisi, C
   Di Ruzza, B
   Dittmann, JR
   DiTuro, P
   Dorr, C
   Donati, S
   Donega, M
   Dong, P
   Donini, J
   Dorigo, T
   Dube, S
   Efron, J
   Erbacher, R
   Errede, D
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   Eusebi, R
   Fang, HC
   Farrington, S
   Fedorko, I
   Fedorko, WT
   Feild, RG
   Feindt, M
   Fernandez, JP
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   Flanagan, G
   Foland, A
   Forrester, S
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   Garcia, JE
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   Grinstein, S
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   Herndon, M
   Heuser, J
   Hidas, D
   Hill, CS
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   Hocker, A
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   Hou, S
   Houlden, M
   Hsu, SC
   Huffman, BT
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   Adelman, J.
   Affolder, T.
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   Albrow, M. G.
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   Amerio, S.
   Amidei, D.
   Anastassov, A.
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   Boisvert, V.
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   Cyr, D.
   DaRonco, S.
   Datta, M.
   D'Auria, S.
   Davies, T.
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   Dagenhart, D.
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   Deisher, A.
   De Lentdecker, G.
   Dell'Orso, M.
   Paoli, F. Delli
   Demortier, L.
   Deng, J.
   Deninno, M.
   De Pedis, D.
   Derwent, P. F.
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   Gallinaro, M.
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   Gay, C.
   Gerberich, H.
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   Gomez-Ceballos, G.
   Goncharov, M.
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   Gorelov, I.
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   Gresele, A.
   Griffiths, M.
   Grinstein, S.
   Grosso-Pilcher, C.
   Group, R. C.
   Grundler, U.
   da Costa, J. Guimaraes
   Gunay-Unalan, Z.
   Haber, C.
   Hahn, K.
   Hahn, S. R.
   Halkiadakis, E.
   Hamilton, A.
   Han, B. -Y.
   Han, J. Y.
   Handler, R.
   Happacher, F.
   Hara, K.
   Hare, M.
   Harper, S.
   Harr, R. F.
   Harris, R. M.
   Hartz, M.
   Hatakeyama, K.
   Hauser, J.
   Heijboer, A.
   Heinemann, B.
   Heinrich, J.
   Henderson, C.
   Herndon, M.
   Heuser, J.
   Hidas, D.
   Hill, C. S.
   Hirschbuehl, D.
   Hocker, A.
   Holloway, A.
   Hou, S.
   Houlden, M.
   Hsu, S. -C.
   Huffman, B. T.
   Hughes, R. E.
   Husemann, U.
   Huston, J.
   Incandela, J.
   Introzzi, G.
   Iori, M.
   Ishizawa, Y.
   Ivanov, A.
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   Wallny, R.
   Wang, S. M.
   Warburton, A.
   Waschke, S.
   Waters, D.
   Whitehouse, B.
   Whiteson, D.
   Wicklund, A. B.
   Wicklund, E.
   Williams, G.
   Williams, H. H.
   Wilson, P.
   Winer, B. L.
   Wittich, P.
   Wolbers, S.
   Wolfe, C.
   Wright, T.
   Wu, X.
   Wynne, S. M.
   Yagil, A.
   Yamamoto, K.
   Yamaoka, J.
   Yamashita, T.
   Yang, C.
   Yang, U. K.
   Yang, Y. C.
   Yao, W. M.
   Yeh, G. P.
   Yoh, J.
   Yorita, K.
   Yoshida, T.
   Yu, G. B.
   Yu, I.
   Yu, S. S.
   Yun, J. C.
   Zanello, L.
   Zanetti, A.
   Zaw, I.
   Zhang, X.
   Zhou, J.
   Zucchelli, S.
CA CDF Collaboration
TI Measurement of the B+ production cross section in pp(-) collisions at
   root s=1960 GeV
SO PHYSICAL REVIEW D
LA English
DT Article
ID HEAVY-QUARK PRODUCTION; P(P)OVER-BAR COLLISIONS; 1.8 TEV; FRAGMENTATION
   FUNCTIONS; LUMINOSITY MONITOR; E+E ANNIHILATION; ROOT-S; DETECTOR; QCD
AB We present a new measurement of the B+ meson differential cross section d sigma/dp(T) at root s=1960 GeV. The data correspond to an integrated luminosity of 739 pb(-1) collected with the upgraded CDF detector (CDF II) at the Fermilab Tevatron collider. B+ candidates are reconstructed through the decay B+-> J/psi K+, with J/psi ->mu(+)mu(-). The integrated cross section for producing B+ mesons with p(T)>= 6 GeV/c and vertical bar y vertical bar <= 1 is measured to be 2.78 +/- 0.24 mu b.
C1 Univ Illinois, Urbana, IL 61801 USA.
   Acad Sinica, Inst Phys, Taipei 11529, Taiwan.
   Argonne Natl Lab, Argonne, IL 60439 USA.
   Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Bellaterra, Barcelona, Spain.
   Baylor Univ, Waco, TX 76798 USA.
   Ist Nazl Fis Nucl, I-40127 Bologna, Italy.
   Brandeis Univ, Waltham, MA 02254 USA.
   Univ Calif Davis, Davis, CA 95616 USA.
   Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
   Univ Calif San Diego, La Jolla, CA 92093 USA.
   Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
   Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain.
   Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
   Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
   Comenius Univ, Bratislava 84248, Slovakia.
   Slovak Acad Sci, Inst Expt Phys, Kosice 04001, Slovakia.
   Joint Inst Nucl Res, RU-141980 Dubna, Russia.
   Duke Univ, Durham, NC 27708 USA.
   Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   Univ Florida, Gainesville, FL 32611 USA.
   Ist Nazl Fis Nucl, Nazl Frascati Lab, I-00044 Frascati, Italy.
   Univ Geneva, CH-1211 Geneva 4, Switzerland.
   Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland.
   Harvard Univ, Cambridge, MA 02138 USA.
   Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland.
   Helsinki Inst Phys, FIN-00014 Helsinki, Finland.
   Johns Hopkins Univ, Baltimore, MD 21218 USA.
   Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany.
   KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan.
   Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea.
   Seoul Natl Univ, Seoul 151742, South Korea.
   Sungkyunkwan Univ, Suwon 440746, South Korea.
   Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Univ Liverpool, Liverpool L69 7ZE, Merseyside, England.
   UCL, London WC1E 6BT, England.
   Ctr Invest Energet Medioambientales & Tecnol, E-28040 Madrid, Spain.
   MIT, Cambridge, MA 02139 USA.
   McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada.
   Univ Toronto, Toronto, ON M5S 1A7, Canada.
   Univ Michigan, Ann Arbor, MI 48109 USA.
   Michigan State Univ, E Lansing, MI 48824 USA.
   Inst Theoret & Expt Phys, Moscow 117259, Russia.
   Univ New Mexico, Albuquerque, NM 87131 USA.
   Northwestern Univ, Evanston, IL 60208 USA.
   Ohio State Univ, Columbus, OH 43210 USA.
   Okayama Univ, Okayama 7008530, Japan.
   Osaka City Univ, Osaka 588, Japan.
   Univ Oxford, Oxford OX1 3RH, England.
   Univ Padua, Ist Nazl Fis Nucl, Sez Padova Trento, I-35131 Padua, Italy.
   Univ Paris 06, IN2P3, CNRS, UMR7585,LPNHE, F-75252 Paris, France.
   Univ Penn, Philadelphia, PA 19104 USA.
   Univ Pisa, Ist Nazl Fis Nucl, Siena, Italy.
   Scuola Normale Super Pisa, I-56127 Pisa, Italy.
   Univ Pittsburgh, Pittsburgh, PA 15260 USA.
   Purdue Univ, W Lafayette, IN 47907 USA.
   Univ Rochester, Rochester, NY 14627 USA.
   Rockefeller Univ, New York, NY 10021 USA.
   Univ Roma La Sapienza, Sez Roma 1, Ist Nazl Fis Nucl, I-00185 Rome, Italy.
   Rutgers State Univ, Piscataway, NJ 08855 USA.
   Texas A&M Univ, College Stn, TX 77843 USA.
   Univ Trieste, Ist Nazl Fis Nucl, Udine, Italy.
   Univ Tsukuba, Tsukuba, Ibaraki 305, Japan.
   Tufts Univ, Medford, MA 02155 USA.
   Waseda Univ, Tokyo 169, Japan.
   Wayne State Univ, Detroit, MI 48201 USA.
   Univ Wisconsin, Madison, WI 53706 USA.
   Yale Univ, New Haven, CT 06520 USA.
RP Abulencia, A (reprint author), Univ Illinois, Urbana, IL 61801 USA.
RI Scodellaro, Luca/K-9091-2014; Paulini, Manfred/N-7794-2014; Russ,
   James/P-3092-2014; unalan, zeynep/C-6660-2015; Lazzizzera,
   Ignazio/E-9678-2015; Cabrera Urban, Susana/H-1376-2015; Garcia, Jose
   /H-6339-2015; ciocci, maria agnese /I-2153-2015; Cavalli-Sforza,
   Matteo/H-7102-2015; Introzzi, Gianluca/K-2497-2015; Muelmenstaedt,
   Johannes/K-2432-2015; Gorelov, Igor/J-9010-2015; Ivanov,
   Andrew/A-7982-2013; De Cecco, Sandro/B-1016-2012; Warburton,
   Andreas/N-8028-2013; Ruiz, Alberto/E-4473-2011; Kim,
   Soo-Bong/B-7061-2014; Lysak, Roman/H-2995-2014; Azzi,
   Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; manca,
   giulia/I-9264-2012; Amerio, Silvia/J-4605-2012; Annovi,
   Alberto/G-6028-2012; messina, andrea/C-2753-2013; Robson,
   Aidan/G-1087-2011; Prokoshin, Fedor/E-2795-2012; Leonardo,
   Nuno/M-6940-2016; Canelli, Florencia/O-9693-2016; 
OI Scodellaro, Luca/0000-0002-4974-8330; Paulini,
   Manfred/0000-0002-6714-5787; Russ, James/0000-0001-9856-9155; unalan,
   zeynep/0000-0003-2570-7611; Lazzizzera, Ignazio/0000-0001-5092-7531;
   ciocci, maria agnese /0000-0003-0002-5462; Introzzi,
   Gianluca/0000-0002-1314-2580; Muelmenstaedt,
   Johannes/0000-0003-1105-6678; Gorelov, Igor/0000-0001-5570-0133; Ivanov,
   Andrew/0000-0002-9270-5643; Warburton, Andreas/0000-0002-2298-7315;
   Ruiz, Alberto/0000-0002-3639-0368; Azzi, Patrizia/0000-0002-3129-828X;
   Punzi, Giovanni/0000-0002-8346-9052; Annovi,
   Alberto/0000-0002-4649-4398; Prokoshin, Fedor/0000-0001-6389-5399;
   Leonardo, Nuno/0000-0002-9746-4594; Canelli,
   Florencia/0000-0001-6361-2117; Gallinaro, Michele/0000-0003-1261-2277;
   Salamanna, Giuseppe/0000-0002-0861-0052; Turini,
   Nicola/0000-0002-9395-5230
NR 42
TC 41
Z9 41
U1 1
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 1
AR 012010
DI 10.1103/PhysRevD.75.012010
PG 12
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200017
ER

PT J
AU Agashe, K
   Perez, G
   Soni, A
AF Agashe, Kaustubh
   Perez, Gilad
   Soni, Amarjit
TI Collider signals of top quark flavor violation from a warped extra
   dimension
SO PHYSICAL REVIEW D
LA English
DT Article
ID RANDALL-SUNDRUM MODEL; STANDARD MODEL; UNITARITY TRIANGLE; POLARIZATION;
   GEOMETRY; MIXINGS; PHYSICS; DECAYS; MASSES; FIELDS
AB We study top quark flavor violation in the framework of a warped extra dimension with the Standard Model (SM) fields propagating in the bulk. Such a scenario provides solutions to both the Planck-weak hierarchy problem and the flavor puzzle of the SM without inducing a flavor problem. We find that, generically, tcZ couplings receive a huge enhancement, in particular, the right-handed ones can be O(1%). This results in BR(t -> cZ) at or above the sensitivity of the Large Hadron Collider (LHC). At the International Linear Collider (ILC), single top production, via e(+)e(-)-> t $$(c) over bar, can be a striking signal for this scenario. In particular, it represents a physics topic of critical importance that can be explored even with a relatively low energy option, close to the tc threshold. At both the LHC and the ILC, angular distributions can probe the above prediction of dominance of right-handed couplings.
C1 Syracuse Univ, Dept Phys, Syracuse, NY 13244 USA.
   Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA.
   SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA.
   Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Agashe, K (reprint author), Syracuse Univ, Dept Phys, Syracuse, NY 13244 USA.
NR 46
TC 85
Z9 86
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 JAN
PY 2007
VL 75
IS 1
AR 015002
DI 10.1103/PhysRevD.75.015002
PG 5
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200068
ER

PT J
AU Airapetian, A
   Akopov, N
   Akopov, Z
   Amarian, M
   Andrus, A
   Aschenauer, EC
   Augustyniak, W
   Avakian, R
   Avetissian, A
   Avetissian, E
   Bailey, P
   Balin, D
   Beckmann, M
   Belostotski, S
   Bianchi, N
   Blok, HP
   Bottcher, H
   Borissov, A
   Borysenko, A
   Bouwhuis, M
   Brull, A
   Bryzgalov, V
   Capiluppi, M
   Capitani, GP
   Chen, T
   Ciullo, G
   Contalbrigo, M
   Dalpiaz, PF
   Deconinck, W
   De Leo, R
   Demey, M
   De Nardo, L
   De Sanctis, E
   Devitsin, E
   Di Nezza, P
   Dreschler, J
   Duren, M
   Ehrenfried, M
   Elalaoui-Moulay, A
   Elbakian, G
   Ellinghaus, F
   Elschenbroich, U
   Fabbri, R
   Fantoni, A
   Felawka, L
   Frullani, S
   Funel, A
   Gapienko, G
   Gapienko, V
   Garibaldi, F
   Garrow, K
   Gaskell, D
   Gavrilov, G
   Gharibyan, V
   Grebeniouk, O
   Gregor, IM
   Hadjidakis, C
   Hafidi, K
   Hartig, M
   Hasch, D
   Hesselink, WHA
   Hillenbrand, A
   Hoek, M
   Holler, Y
   Hommez, B
   Hristova, I
   Iarygin, G
   Ivanilov, A
   Izotov, A
   Jackson, HE
   Jgoun, A
   Kaiser, R
   Kinney, E
   Kisselev, A
   Kobayashi, T
   Kopytin, M
   Korotkov, V
   Kozlov, V
   Krauss, B
   Krivokhijine, VG
   Lagamba, L
   Lapikas, L
   Laziev, A
   Lenisa, P
   Liebing, P
   Linden-Levy, LA
   Lorenzon, W
   Lu, H
   Lu, J
   Lu, S
   Ma, BQ
   Maiheu, B
   Makins, NCR
   Mao, Y
   Marianski, B
   Marukyan, H
   Masoli, F
   Mexner, V
   Meyners, N
   Michler, T
   Mikloukho, O
   Miller, CA
   Miyachi, Y
   Muccifora, V
   Murray, M
   Nagaitsev, A
   Nappi, E
   Naryshkin, Y
   Negodaev, M
   Nowak, WD
   Oganessyan, K
   Ohsuga, H
   Osborne, A
   Pickert, N
   Potterveld, DH
   Raithel, M
   Reggiani, D
   Reimer, PE
   Reischl, A
   Reolon, AR
   Riedl, C
   Rith, K
   Rosner, G
   Rostomyan, A
   Rubacek, L
   Rubin, J
   Ryckbosch, D
   Salomatin, Y
   Sanjiev, I
   Savin, I
   Schafer, A
   Schnell, G
   Schuler, KP
   Seele, J
   Seidl, R
   Seitz, B
   Shanidze, R
   Shearer, C
   Shibata, TA
   Shutov, V
   Sinram, K
   Sommer, W
   Stancari, M
   Statera, M
   Steffens, E
   Steijger, JJM
   Stenzel, H
   Stewart, J
   Stinzing, F
   Tait, P
   Tanaka, H
   Taroian, S
   Tchuiko, B
   Terkulov, A
   Trzcinski, A
   Tytgat, M
   Vandenbroucke, A
   van der Nat, PB
   van der Steenhoven, G
   van Haarlem, Y
   Vikhrov, V
   Vincter, MG
   Vogel, C
   Volmer, J
   Wang, S
   Wendland, J
   Ye, Y
   Ye, Z
   Yen, S
   Zihlmann, B
   Zupranski, P
AF Airapetian, A.
   Akopov, N.
   Akopov, Z.
   Amarian, M.
   Andrus, A.
   Aschenauer, E. C.
   Augustyniak, W.
   Avakian, R.
   Avetissian, A.
   Avetissian, E.
   Bailey, P.
   Balin, D.
   Beckmann, M.
   Belostotski, S.
   Bianchi, N.
   Blok, H. P.
   Boettcher, H.
   Borissov, A.
   Borysenko, A.
   Bouwhuis, M.
   Bruell, A.
   Bryzgalov, V.
   Capiluppi, M.
   Capitani, G. P.
   Chen, T.
   Ciullo, G.
   Contalbrigo, M.
   Dalpiaz, P. F.
   Deconinck, W.
   De Leo, R.
   Demey, M.
   De Nardo, L.
   De Sanctis, E.
   Devitsin, E.
   Di Nezza, P.
   Dreschler, J.
   Dueren, M.
   Ehrenfried, M.
   Elalaoui-Moulay, A.
   Elbakian, G.
   Ellinghaus, F.
   Elschenbroich, U.
   Fabbri, R.
   Fantoni, A.
   Felawka, L.
   Frullani, S.
   Funel, A.
   Gapienko, G.
   Gapienko, V.
   Garibaldi, F.
   Garrow, K.
   Gaskell, D.
   Gavrilov, G.
   Gharibyan, V.
   Grebeniouk, O.
   Gregor, I. M.
   Hadjidakis, C.
   Hafidi, K.
   Hartig, M.
   Hasch, D.
   Hesselink, W. H. A.
   Hillenbrand, A.
   Hoek, M.
   Holler, Y.
   Hommez, B.
   Hristova, I.
   Iarygin, G.
   Ivanilov, A.
   Izotov, A.
   Jackson, H. E.
   Jgoun, A.
   Kaiser, R.
   Kinney, E.
   Kisselev, A.
   Kobayashi, T.
   Kopytin, M.
   Korotkov, V.
   Kozlov, V.
   Krauss, B.
   Krivokhijine, V. G.
   Lagamba, L.
   Lapikas, L.
   Laziev, A.
   Lenisa, P.
   Liebing, P.
   Linden-Levy, L. A.
   Lorenzon, W.
   Lu, H.
   Lu, J.
   Lu, S.
   Ma, B. -Q.
   Maiheu, B.
   Makins, N. C. R.
   Mao, Y.
   Marianski, B.
   Marukyan, H.
   Masoli, F.
   Mexner, V.
   Meyners, N.
   Michler, T.
   Mikloukho, O.
   Miller, C. A.
   Miyachi, Y.
   Muccifora, V.
   Murray, M.
   Nagaitsev, A.
   Nappi, E.
   Naryshkin, Y.
   Negodaev, M.
   Nowak, W. -D.
   Oganessyan, K.
   Ohsuga, H.
   Osborne, A.
   Pickert, N.
   Potterveld, D. H.
   Raithel, M.
   Reggiani, D.
   Reimer, P. E.
   Reischl, A.
   Reolon, A. R.
   Riedl, C.
   Rith, K.
   Rosner, G.
   Rostomyan, A.
   Rubacek, L.
   Rubin, J.
   Ryckbosch, D.
   Salomatin, Y.
   Sanjiev, I.
   Savin, I.
   Schaefer, A.
   Schnell, G.
   Schueler, K. P.
   Seele, J.
   Seidl, R.
   Seitz, B.
   Shanidze, R.
   Shearer, C.
   Shibata, T. -A.
   Shutov, V.
   Sinram, K.
   Sommer, W.
   Stancari, M.
   Statera, M.
   Steffens, E.
   Steijger, J. J. M.
   Stenzel, H.
   Stewart, J.
   Stinzing, F.
   Tait, P.
   Tanaka, H.
   Taroian, S.
   Tchuiko, B.
   Terkulov, A.
   Trzcinski, A.
   Tytgat, M.
   Vandenbroucke, A.
   van der Nat, P. B.
   van der Steenhoven, G.
   van Haarlem, Y.
   Vikhrov, V.
   Vincter, M. G.
   Vogel, C.
   Volmer, J.
   Wang, S.
   Wendland, J.
   Ye, Y.
   Ye, Z.
   Yen, S.
   Zihlmann, B.
   Zupranski, P.
CA HERMES Collaboration
TI Beam-charge azimuthal asymmetry and deeply virtual Compton scattering
SO PHYSICAL REVIEW D
LA English
DT Article
ID GENERALIZED PARTON DISTRIBUTIONS; IMPACT PARAMETER SPACE; NUCLEON
AB The first observation of an azimuthal cross section asymmetry with respect to the charge of the incoming lepton beam is reported from a study of hard exclusive electroproduction of real photons. The data have been accumulated by the HERMES experiment at DESY, in which the HERA 27.6 GeV electron or positron beam scattered off an unpolarized hydrogen gas target. The observed asymmetry is attributed to the interference between the Bethe-Heitler process and the deeply virtual Compton scattering (DVCS) process. The interference term is sensitive to DVCS amplitudes, which provide the most direct access to generalized parton distributions.
C1 Univ Michigan, Randall Lab Phys, Ann Arbor, MI 48109 USA.
   Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada.
   Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   Ist Nazl Fis Nucl, Sez Bari, I-70124 Bari, Italy.
   Peking Univ, Sch Phys, Beijing 100871, Peoples R China.
   Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China.
   Univ Colorado, Nucl Phys Lab, Boulder, CO 80309 USA.
   DESY, D-22603 Hamburg, Germany.
   DESY, D-15738 Zeuthen, Germany.
   Joint Inst Nucl Res, Dubna 141980, Russia.
   Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany.
   Univ Ferrara, Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy.
   Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy.
   Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
   Univ Ghent, Dept Subatom & Radiat Phys, B-9000 Ghent, Belgium.
   Univ Giessen, Inst Phys, D-35392 Giessen, Germany.
   Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland.
   Univ Illinois, Dept Phys, Urbana, IL 61801 USA.
   PN Lebedev Phys Inst, Moscow 117924, Russia.
   NIKHEF, NL-1009 DB Amsterdam, Netherlands.
   Petersburg Nucl Phys Inst, Gatchina 188350, Russia.
   Inst High Energy Phys, Protvino 142281, Moscow Region, Russia.
   Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany.
   Ist Super Sanita, Ist Nazl Fis Nucl, Sez Roma 1, Grp Sanita, I-00161 Rome, Italy.
   Ist Super Sanita, Phys Lab, I-00161 Rome, Italy.
   Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada.
   TRIUMF, Vancouver, BC V6T 2A3, Canada.
   Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan.
   Vrije Univ, Dept Phys & Astron, NL-1081 HV Amsterdam, Netherlands.
   Andrzej Soltan Inst Nucl Studies, PL-00689 Warsaw, Poland.
   Yerevan Phys Inst, Yerevan 375036, Armenia.
RP Airapetian, A (reprint author), Univ Michigan, Randall Lab Phys, Ann Arbor, MI 48109 USA.
RI Deconinck, Wouter/F-4054-2012; Gavrilov, Gennady/C-6260-2013; Reimer,
   Paul/E-2223-2013; Negodaev, Mikhail/A-7026-2014; Taroian,
   Sarkis/E-1668-2014; El Alaoui, Ahmed/B-4638-2015; Kozlov,
   Valentin/M-8000-2015; Terkulov, Adel/M-8581-2015; 
OI Lagamba, Luigi/0000-0002-0233-9812; Deconinck,
   Wouter/0000-0003-4033-6716; Hoek, Matthias/0000-0002-1893-8764
NR 39
TC 72
Z9 73
U1 1
U2 7
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 1
AR 011103
DI 10.1103/PhysRevD.75.011103
PG 5
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200003
ER

PT J
AU Airapetian, A
   Akopov, N
   Akopov, Z
   Andrus, A
   Aschenauer, EC
   Augustyniak, W
   Avakian, R
   Avetissian, A
   Avetissian, E
   Belostotski, S
   Bianchi, N
   Blok, HP
   Bottcher, H
   Borissov, A
   Borysenko, A
   Brull, A
   Bryzgalov, V
   Capiluppi, M
   Capitani, GP
   Ciullo, G
   Contalbrigo, M
   Dalpiaz, PF
   Deconinck, W
   De Leo, R
   Demey, M
   De Nardo, L
   De Sanctis, E
   Devitsin, E
   Diefenthaler, M
   Di Nezza, P
   Dreschler, J
   Duren, M
   Ehrenfried, M
   Elalaoui-Moulay, A
   Elbakian, G
   Ellinghaus, F
   Elschenbroich, U
   Fabbri, R
   Fantoni, A
   Felawka, L
   Frullani, S
   Funel, A
   Gabbert, D
   Garber, Y
   Gapienko, G
   Gapienko, V
   Garibaldi, F
   Garrow, K
   Gavrilov, G
   Gharibyan, V
   Giordano, F
   Grebeniouk, O
   Gregor, IM
   Guler, H
   Gute, A
   Hadjidakis, C
   Hartig, M
   Hasch, D
   Hasegawa, T
   Hesselink, WHA
   Hillenbrand, A
   Hoek, M
   Holler, Y
   Hommez, B
   Hristova, I
   Iarygin, G
   Ivanilov, A
   Izotov, A
   Jackson, HE
   Jgoun, A
   Kaiser, R
   Keri, T
   Kinney, E
   Kisselev, A
   Kobayashi, T
   Kopytin, M
   Korotkov, V
   Kozlov, V
   Krauss, B
   Kravchenko, P
   Krivokhijine, VG
   Lagamba, L
   Lapikas, L
   Lenisa, P
   Liebing, P
   Linden-Levy, LA
   Lorenzon, W
   Lu, J
   Lu, S
   Ma, BQ
   Maiheu, B
   Makins, NCR
   Mao, Y
   Marianski, B
   Marukyan, H
   Masoli, F
   Mexner, V
   Meyners, N
   Michler, T
   Mikloukho, O
   Miller, CA
   Miyachi, Y
   Muccifora, V
   Murray, M
   Nagaitsev, A
   Nappi, E
   Naryshkin, Y
   Negodaev, M
   Nowak, WD
   Ohsuga, H
   Osborne, A
   Perez-Benito, R
   Pickert, N
   Raithel, M
   Reggiani, D
   Reimer, PE
   Reischl, A
   Reolon, AR
   Riedl, C
   Rith, K
   Rosner, G
   Rostomyan, A
   Rubacek, L
   Rubin, J
   Ryckbosch, D
   Salomatin, Y
   Sanjiev, I
   Savin, I
   Schafer, A
   Schnell, G
   Schuler, KP
   Seele, J
   Seitz, B
   Shearer, C
   Shibata, TA
   Shutov, V
   Sinram, K
   Stancari, M
   Statera, M
   Steffens, E
   Steijger, JJM
   Stenzel, H
   Stewart, J
   Stinzing, F
   Stosslein, U
   Streit, J
   Tait, P
   Tanaka, H
   Taroian, S
   Tchuiko, B
   Terkulov, A
   Trzcinski, A
   Tytgat, M
   Vandenbroucke, A
   van der Nat, PB
   van der Steenhoven, G
   van Haarlem, Y
   Veretennikov, D
   Vikhrov, V
   Vogel, C
   Wang, S
   Weiskopf, C
   Ye, Y
   Ye, Z
   Yen, S
   Zihlmann, B
   Zupranski, P
AF Airapetian, A.
   Akopov, N.
   Akopov, Z.
   Andrus, A.
   Aschenauer, E. C.
   Augustyniak, W.
   Avakian, R.
   Avetissian, A.
   Avetissian, E.
   Belostotski, S.
   Bianchi, N.
   Blok, H. P.
   Boettcher, H.
   Borissov, A.
   Borysenko, A.
   Brull, A.
   Bryzgalov, V.
   Capiluppi, M.
   Capitani, G. P.
   Ciullo, G.
   Contalbrigo, M.
   Dalpiaz, P. F.
   Deconinck, W.
   De Leo, R.
   Demey, M.
   De Nardo, L.
   De Sanctis, E.
   Devitsin, E.
   Diefenthaler, M.
   Di Nezza, P.
   Dreschler, J.
   Dueren, M.
   Ehrenfried, M.
   Elalaoui-Moulay, A.
   Elbakian, G.
   Ellinghaus, F.
   Elschenbroich, U.
   Fabbri, R.
   Fantoni, A.
   Felawka, L.
   Frullani, S.
   Funel, A.
   Gabbert, D.
   Gaerber, Y.
   Gapienko, G.
   Gapienko, V.
   Garibaldi, F.
   Garrow, K.
   Gavrilov, G.
   Gharibyan, V.
   Giordano, F.
   Grebeniouk, O.
   Gregor, I. M.
   Guler, H.
   Gute, A.
   Hadjidakis, C.
   Hartig, M.
   Hasch, D.
   Hasegawa, T.
   Hesselink, W. H. A.
   Hillenbrand, A.
   Hoek, M.
   Holler, Y.
   Hommez, B.
   Hristova, I.
   Iarygin, G.
   Ivanilov, A.
   Izotov, A.
   Jackson, H. E.
   Jgoun, A.
   Kaiser, R.
   Keri, T.
   Kinney, E.
   Kisselev, A.
   Kobayashi, T.
   Kopytin, M.
   Korotkov, V.
   Kozlov, V.
   Krauss, B.
   Kravchenko, P.
   Krivokhijine, V. G.
   Lagamba, L.
   Lapikas, L.
   Lenisa, P.
   Liebing, P.
   Linden-Levy, L. A.
   Lorenzon, W.
   Lu, J.
   Lu, S.
   Ma, B. -Q.
   Maiheu, B.
   Makins, N. C. R.
   Mao, Y.
   Marianski, B.
   Marukyan, H.
   Masoli, F.
   Mexner, V.
   Meyners, N.
   Michler, T.
   Mikloukho, O.
   Miller, C. A.
   Miyachi, Y.
   Muccifora, V.
   Murray, M.
   Nagaitsev, A.
   Nappi, E.
   Naryshkin, Y.
   Negodaev, M.
   Nowak, W. -D.
   Ohsuga, H.
   Osborne, A.
   Perez-Benito, R.
   Pickert, N.
   Raithel, M.
   Reggiani, D.
   Reimer, P. E.
   Reischl, A.
   Reolon, A. R.
   Riedl, C.
   Rith, K.
   Rosner, G.
   Rostomyan, A.
   Rubacek, L.
   Rubin, J.
   Ryckbosch, D.
   Salomatin, Y.
   Sanjiev, I.
   Savin, I.
   Schaefer, A.
   Schnell, G.
   Schueler, K. P.
   Seele, J.
   Seitz, B.
   Shearer, C.
   Shibata, T. -A.
   Shutov, V.
   Sinram, K.
   Stancari, M.
   Statera, M.
   Steffens, E.
   Steijger, J. J. M.
   Stenzel, H.
   Stewart, J.
   Stinzing, F.
   Stosslein, U.
   Streit, J.
   Tait, P.
   Tanaka, H.
   Taroian, S.
   Tchuiko, B.
   Terkulov, A.
   Trzcinski, A.
   Tytgat, M.
   Vandenbroucke, A.
   van der Nat, P. B.
   van der Steenhoven, G.
   van Haarlem, Y.
   Veretennikov, D.
   Vikhrov, V.
   Vogel, C.
   Wang, S.
   Weiskopf, C.
   Ye, Y.
   Ye, Z.
   Yen, S.
   Zihlmann, B.
   Zupranski, P.
CA Hermes Collaboration
TI Precise determination of the spin structure function g(1) of the proton,
   deuteron, and neutron
SO PHYSICAL REVIEW D
LA English
DT Review
ID DEEP-INELASTIC-SCATTERING; ELECTRON STORAGE-RING; STRUCTURE FUNCTIONS
   G(2); HERMES EXPERIMENT; PARTON DISTRIBUTIONS; NUCLEAR-POLARIZATION;
   MUON SCATTERING; ASYMMETRY A(2); LEADING ORDER; QCD ANALYSIS
AB Precise measurements of the spin structure functions of the proton g(1)(p)(x,Q(2)) and deuteron g(1)(d)(x,Q(2)) are presented over the kinematic range 0.0041 <= x <= 0.9 and 0.18 GeV2 <= Q(2)<= 20 GeV2. The data were collected at the HERMES experiment at DESY, in deep-inelastic scattering of 27.6 GeV longitudinally polarized positrons off longitudinally polarized hydrogen and deuterium gas targets internal to the HERA storage ring. The neutron spin structure function g(1)(n) is extracted by combining proton and deuteron data. The integrals of g(1)(p,d) at Q(2)=5 GeV2 are evaluated over the measured x range. Neglecting any possible contribution to the g(1)(d) integral from the region x <= 0.021, a value of 0.330 +/- 0.011(theo)+/- 0.025(exp)+/- 0.028(evol) is obtained for the flavor-singlet axial charge a(0) in a leading-twist next-to-next-to-leading-order analysis.
C1 Univ Michigan, Randall Lab Phys, Ann Arbor, MI 48109 USA.
   Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   Ist Nazl Fis Nucl, Sez Bari, I-70124 Bari, Italy.
   Peking Univ, Sch Phys, Beijing 100871, Peoples R China.
   Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China.
   Univ Colorado, Nucl Phys Lab, Boulder, CO 80309 USA.
   DESY, D-22603 Hamburg, Germany.
   DESY, D-15738 Zeuthen, Germany.
   Joint Inst Nucl Res, Dubna 141980, Russia.
   Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany.
   Univ Ferrara, Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy.
   Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy.
   Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
   Univ Ghent, Dept Subatom & Radiat Phys, B-9000 Ghent, Belgium.
   Univ Giessen, Inst Phys, D-35392 Giessen, Germany.
   Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland.
   Univ Illinois, Dept Phys, Urbana, IL 61801 USA.
   PN Lebedev Phys Inst, Moscow 117924, Russia.
   NIKHEF, NL-1009 DB Amsterdam, Netherlands.
   Petersburg Nucl Phys Inst, St Petersburg 188350, Gatchina, Russia.
   Inst High Energy Phys, Protvino 142281, Moscow Region, Russia.
   Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany.
   Ist Super Sanita, Ist Nazl Fis Nucl, Sez Roma 1, Grp Sanita, I-00161 Rome, Italy.
   Ist Super Sanita, Phys Lab, I-00161 Rome, Italy.
   TRIUMF, Vancouver, BC V6T 2A3, Canada.
   Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan.
   Vrije Univ Amsterdam, Dept Phys & Astron, NL-1081 HV Amsterdam, Netherlands.
   Andrzej Soltan Inst Nucl Studies, PL-00689 Warsaw, Poland.
   Yerevan Phys Inst, Yerevan 375036, Armenia.
RP Airapetian, A (reprint author), Univ Michigan, Randall Lab Phys, Ann Arbor, MI 48109 USA.
RI Deconinck, Wouter/F-4054-2012; Gavrilov, Gennady/C-6260-2013; Reimer,
   Paul/E-2223-2013; Negodaev, Mikhail/A-7026-2014; Taroian,
   Sarkis/E-1668-2014; El Alaoui, Ahmed/B-4638-2015; Kozlov,
   Valentin/M-8000-2015; Terkulov, Adel/M-8581-2015; 
OI Lagamba, Luigi/0000-0002-0233-9812; Deconinck,
   Wouter/0000-0003-4033-6716; Hoek, Matthias/0000-0002-1893-8764
NR 99
TC 260
Z9 262
U1 1
U2 9
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 JAN
PY 2007
VL 75
IS 1
AR 012007
DI 10.1103/PhysRevD.75.012007
PG 48
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200014
ER

PT J
AU Aoki, Y
   Dawson, C
   Noaki, J
   Soni, A
AF Aoki, Y.
   Dawson, C.
   Noaki, J.
   Soni, A.
TI Proton decay matrix elements with domain-wall fermions
SO PHYSICAL REVIEW D
LA English
DT Article
ID QUARK MASS RENORMALIZATION; CHIRAL PERTURBATION-THEORY;
   LATTICE-GAUGE-THEORIES; NUCLEON DECAY; QUANTUM CHROMODYNAMICS;
   WAVE-FUNCTIONS; QCD; COMPUTATION; SYMMETRIES; AMPLITUDES
AB Hadronic matrix elements of operators relevant to nucleon decay in grand unified theories are calculated numerically using lattice QCD. In this context, the domain-wall fermion formulation, combined with nonperturbative renormalization, is used for the first time. These techniques bring reduction of a large fraction of the systematic error from the finite lattice spacing. Our main effort is devoted to a calculation performed in the quenched approximation, where the direct calculation of the nucleon to pseudoscalar matrix elements as well as the indirect estimate of them from the nucleon to vacuum matrix elements are performed. First results, using two flavors of dynamical domain-wall quarks for the nucleon to vacuum matrix elements, are also presented to address the systematic error of quenching, which appears to be small compared to the other errors. Our results suggest that the representative values for the low-energy constants from the nucleon to vacuum matrix elements are given as vertical bar alpha vertical bar similar or equal to vertical bar beta vertical bar similar or equal to 0.01 GeV3. For a more reliable estimate of the physical low-energy matrix elements, it is better to use the relevant form factors calculated in the direct method. The direct method tends to give a smaller value of the form factors, compared to the indirect one, thus enhancing the proton lifetime; indeed, for the pi(0) final state the difference between the two methods is quite appreciable.
C1 Univ Gesamthsch Wuppertal, Dept Phys, D-42119 Wuppertal, Germany.
   Brookhaven Natl Lab, RIKEN, BNL, Res Ctr, Upton, NY 11973 USA.
   Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England.
   Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Aoki, Y (reprint author), Brookhaven Natl Lab, RIKEN, BNL, Res Ctr, Upton, NY 11973 USA.
NR 69
TC 48
Z9 48
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 JAN
PY 2007
VL 75
IS 1
AR 014507
DI 10.1103/PhysRevD.75.014507
PG 24
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200065
ER

PT J
AU Aubert, B
   Barate, R
   Bona, M
   Boutigny, D
   Couderc, F
   Karyotakis, Y
   Lees, JP
   Poireau, V
   Tisserand, V
   Zghiche, A
   Grauges, E
   Palano, A
   Chen, JC
   Qi, ND
   Rong, G
   Wang, P
   Zhu, YS
   Eigen, G
   Ofte, I
   Stugu, B
   Abrams, GS
   Battaglia, M
   Brown, DN
   Button-Shafer, J
   Cahn, RN
   Charles, E
   Gill, MS
   Groysman, Y
   Jacobsen, RG
   Kadyk, JA
   Kerth, LT
   Kolomensky, YG
   Kukartsev, G
   Lynch, G
   Mir, LM
   Orimoto, TJ
   Pripstein, M
   Roe, NA
   Ronan, MT
   Wenzel, WA
   Sanchez, PD
   Barrett, M
   Ford, KE
   Harrison, TJ
   Hart, AJ
   Hawkes, CM
   Morgan, SE
   Watson, AT
   Held, T
   Koch, H
   Lewandowski, B
   Pelizaeus, M
   Peters, K
   Schroeder, T
   Steinke, M
   Boyd, JT
   Burke, JP
   Cottingham, WN
   Walker, D
   Cuhadar-Donszelmann, T
   Fulsom, BG
   Hearty, C
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   Eisner, A. M.
   Flacco, C. J.
   Heusch, C. A.
   Kroseberg, J.
   Lockman, W. S.
   Nesom, G.
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   Seiden, A.
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   Mishra, K.
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   Blanc, F.
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   Chen, S.
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   Hocker, A.
   Le Diberder, F.
   Lepeltier, V.
   Lutz, A. M.
   Oyanguren, A.
   Pruvot, S.
   Rodier, S.
   Roudeau, P.
   Schune, M. H.
   Stocchi, A.
   Wang, W. F.
   Wormser, G.
   Cheng, C. H.
   Lange, D. J.
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   Forster, I. J.
   Fry, J. R.
   Gabathuler, E.
   Gamet, R.
   George, K. A.
   Hutchcroft, D. E.
   Payne, D. J.
   Schofield, K. C.
   Touramanis, C.
   Bevan, A. J.
   Di Lodovico, F.
   Menges, W.
   Sacco, R.
   Cowan, G.
   Flaecher, H. U.
   Hopkins, D. A.
   Jackson, P. S.
   McMahon, T. R.
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   Salvatore, F.
   Wren, A. C.
   Brown, D. N.
   Davis, C. L.
   Allison, J.
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   Lafferty, G. D.
   Naisbit, M. T.
   Williams, J. C.
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   Chen, C.
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   Jawahery, A.
   Lae, C. K.
   Roberts, D. A.
   Simi, G.
   Blaylock, G.
   Dallapiccola, C.
   Hertzbach, S. S.
   Li, X.
   Moore, T. B.
   Saremi, S.
   Staengle, H.
   Cowan, R.
   Sciolla, G.
   Sekula, S. J.
   Spitznagel, M.
   Taylor, F.
   Yamamoto, R. K.
   Kim, H.
   Mclachlin, S. E.
   Patel, P. M.
   Robertson, S. H.
   Lazzaro, A.
   Lombardo, V.
   Palombo, F.
   Bauer, J. M.
   Cremaldi, L.
   Eschenburg, V.
   Godang, R.
   Kroeger, R.
   Sanders, D. A.
   Summers, D. J.
   Zhao, H. W.
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   Cote, D.
   Simard, M.
   Taras, P.
   Viaud, F. B.
   Nicholson, H.
   Cavallo, N.
   De Nardo, G.
   Fabozzi, F.
   Gatto, C.
   Lista, L.
   Monorchio, D.
   Paolucci, P.
   Piccolo, D.
   Sciacca, C.
   Baak, M.
   Raven, G.
   Snoek, H. L.
   Jessop, C. P.
   LoSecco, J. M.
   Allmendinger, T.
   Benelli, G.
   Gan, K. K.
   Honscheid, K.
   Hufnagel, D.
   Jackson, P. D.
   Kagan, H.
   Kass, R.
   Rahimi, A. M.
   Ter-Antonyan, R.
   Wong, Q. K.
   Blount, N. L.
   Brau, J.
   Frey, R.
   Igonkina, O.
   Lu, M.
   Rahmat, R.
   Sinev, N. B.
   Strom, D.
   Strube, J.
   Torrence, E.
   Gaz, A.
   Margoni, M.
   Morandin, M.
   Pompili, A.
   Posocco, M.
   Rotondo, M.
   Simonetto, F.
   Stroili, R.
   Voci, C.
   Benayoun, M.
   Chauveau, J.
   Briand, H.
   David, P.
   Del Buono, L.
   de la Vaissiere, Ch.
   Hamon, O.
   Hartfiel, B. L.
   John, M. J. J.
   Leruste, Ph.
   Malcles, J.
   Ocariz, J.
   Roos, L.
   Therin, G.
   Gladney, L.
   Panetta, J.
   Biasini, M.
   Covarelli, R.
   Angelini, C.
   Batignani, G.
   Bettarini, S.
   Bucci, F.
   Calderini, G.
   Carpinelli, M.
   Cenci, R.
   Forti, F.
   Giorgi, M. A.
   Lusiani, A.
   Marchiori, G.
   Mazur, M. A.
   Morganti, M.
   Neri, N.
   Paoloni, E.
   Rizzo, G.
   Walsh, J. J.
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CA BABAR Collaboration
TI Improved measurements of the branching fractions for B-0 ->pi(+) pi(-)
   and B-0 -> K+ pi(-), and a search for B-0 -> K+ K-
SO PHYSICAL REVIEW D
LA English
DT Article
ID B-MESONS; PI-K; DECAYS; GAMMA; FACTORIZATION; DETECTOR; RATIOS
AB We present measurements of the branching fractions for the charmless two-body decays B-0 ->pi(+)pi(-) and B-0 -> K+pi(-), and a search for the decay B-0 -> K+K-. We include the effects of final-state radiation from the daughter mesons for the first time, and quote branching fractions for the inclusive processes B-0 -> h(+)h('-)n gamma, where h and h(') are pions or kaons. The maximum value of the sum of the energies of the n undetected photons, E-gamma(max), is mode-dependent. Using a data sample of approximately 227x10(6) Upsilon(4S)-> B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at SLAC, we measure: B(B-0 ->pi(+)pi(-)n gamma;E-gamma(max)=150 MeV)=(5.1 +/- 0.4 +/- 0.2)x10(-6), B(B-0 -> K+pi(-)n gamma;E-gamma(max)=105 MeV)=(18.1 +/- 0.6 +/- 0.6)x10(-6), B(B-0 -> K(+)K(-)n gamma;E-gamma(max)=59 MeV)< 0.5x10(-6)(90% confidence level), where the first uncertainty is statistical and the second is systematic. Theoretical calculations can be used to extrapolate from the above measurements the nonradiative branching fractions, B-0. Using one such calculation, we find: B-0(B-0 ->pi(+)pi(-))=(5.5 +/- 0.4 +/- 0.3)x10(-6), B-0(B-0 -> K+pi(-))=(19.1 +/- 0.6 +/- 0.6)x10(-6), B-0(B-0 -> K+K-)< 0.5x10(-6)(90% confidence level). Meaningful comparison between theory and experiment, as well as combination of measurements from different experiments, can be performed only in terms of these nonradiative quantities.
C1 Lab Phys Particules, F-74941 Annecy Le Vieux, France.
   Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain.
   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.
   Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, 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.
   Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany.
   Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
   Ecole Polytech, Lab Leprince Ringuet, 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.
   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, London SW7 2AZ, England.
   Univ Iowa, Iowa City, IA 52242 USA.
   Iowa State Univ, Ames, IA 50011 USA.
   Johns Hopkins Univ, Baltimore, MD 21218 USA.
   Univ Karlsruhe, Inst Expt Kernphys, D-76021 Karlsruhe, Germany.
   CNRS, Lab Accelerateur Lineaire, IN2P3, F-91898 Orsay, France.
   Univ Paris 11, F-91898 Orsay, France.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   Univ Liverpool, Liverpool L69 7ZE, Merseyside, England.
   Queen Mary 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.
   Ist Nazl Fis Nucl, I-20133 Milan, Italy.
   Univ Mississippi, University, MS 38677 USA.
   Univ Montreal, Montreal, PQ H3C 3J7, Canada.
   Mt Holyoke Coll, S Hadley, MA 01075 USA.
   Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy.
   Ist Nazl Fis Nucl, I-80126 Naples, Italy.
   NIKHEF H, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands.
   Univ Notre Dame, Notre Dame, IN 46556 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 & Hautes Energies, F-75252 Paris, France.
   Univ Paris 07, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France.
   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 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.
   Univ Valencia, IFIC, CSIC, E-46071 Valencia, Spain.
   Univ Victoria, Victoria, BC V8W 3P6, Canada.
   Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
   Univ Wisconsin, Madison, WI 53706 USA.
   Yale Univ, New Haven, CT 06511 USA.
RP Aubert, B (reprint author), Lab Phys Particules, F-74941 Annecy Le Vieux, France.
RI Rizzo, Giuliana/A-8516-2015; Di Lodovico, Francesca/L-9109-2016;
   Pappagallo, Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey,
   Raymond/E-2830-2016; dong, liaoyuan/A-5093-2015; Monge, Maria
   Roberta/G-9127-2012; Oyanguren, Arantza/K-6454-2014; Luppi,
   Eleonora/A-4902-2015; 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; Lusiani,
   Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016; Lusiani,
   Alberto/A-3329-2016; Della Ricca, Giuseppe/B-6826-2013; Bellini,
   Fabio/D-1055-2009; 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; de Sangro, Riccardo/J-2901-2012; Cavallo,
   Nicola/F-8913-2012; Saeed, Mohammad Alam/J-7455-2012; Negrini,
   Matteo/C-8906-2014; Peters, Klaus/C-2728-2008; de Groot,
   Nicolo/A-2675-2009; Lista, Luca/C-5719-2008
OI Pacetti, Simone/0000-0002-6385-3508; Covarelli,
   Roberto/0000-0003-1216-5235; Rizzo, Giuliana/0000-0003-1788-2866;
   Paoloni, Eugenio/0000-0001-5969-8712; Faccini,
   Riccardo/0000-0003-2613-5141; Raven, Gerhard/0000-0002-2897-5323; Di
   Lodovico, Francesca/0000-0003-3952-2175; Pappagallo,
   Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826;
   Frey, Raymond/0000-0003-0341-2636; Egede, Ulrik/0000-0001-5493-0762;
   Bettarini, Stefano/0000-0001-7742-2998; Cibinetto,
   Gianluigi/0000-0002-3491-6231; dong, liaoyuan/0000-0002-4773-5050;
   Monge, Maria Roberta/0000-0003-1633-3195; Oyanguren,
   Arantza/0000-0002-8240-7300; 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; 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;
   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; Saeed, Mohammad
   Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963; Peters,
   Klaus/0000-0001-7133-0662; 
NR 28
TC 30
Z9 30
U1 1
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 1
AR 012008
DI 10.1103/PhysRevD.75.012008
PG 9
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200015
ER

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CA BaBar Collaboration
TI Inclusive Lambda(+)(c) production in e(+)e(-) annihilations at root
   s=10.54 GeV and in Y(4S) decays
SO PHYSICAL REVIEW D
LA English
DT Article
ID HEAVY-QUARK FRAGMENTATION; HADRONIC Z-DECAYS; EXCITED B-MESONS; ASTERISK
   PRODUCTION; Z(0) DECAYS; QCD; LEP; SPECTRA; PHYSICS; GLUONS
AB We present measurements of the total production rates and momentum distributions of the charmed baryon Lambda(+)(c) in e(+)e(-)-> hadrons at a center-of-mass energy of 10.54 GeV and in Upsilon(4S) decays. In hadronic events at 10.54 GeV, charmed hadrons are almost exclusively leading particles in e(+)e(-)-> cc events, allowing direct studies of c-quark fragmentation. We measure a momentum distribution for Lambda(+)(c) baryons that differs significantly from those measured previously for charmed mesons. Comparing with a number of models, we find none that can describe the distribution completely. We measure an average scaled momentum of < x(p)>=0.574 +/- 0.009 and a total rate of N-Lambda c(qq)=0.057 +/- 0.002(exp.)+/- 0.015(BF) Lambda(+)(c) per hadronic event, where the experimental error is much smaller than that due to the branching fraction into the reconstructed decay mode, pK(-)pi(+). In Upsilon(4S) decays we measure a total rate of N-Lambda c(Upsilon)=0.091 +/- 0.006(exp.)+/- 0.024(BF) per Upsilon(4S) decay, and find a much softer momentum distribution than expected from B decays into a Lambda(+)(c) plus an antinucleon and one to three pions.
C1 CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
   Univ Savoie, F-74941 Annecy Le Vieux, France.
   Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain.
   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.
   Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, 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.
   Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany.
   Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
   Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
   Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
   Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy.
   Ist Nazl Fis Nucl, Lab Nazl Frascati, I-44100 Ferrara, 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, London SW7 2AZ, England.
   Univ Iowa, Iowa City, IA 52242 USA.
   Iowa State Univ, Ames, IA 50011 USA.
   Johns Hopkins Univ, Baltimore, MD 21218 USA.
   Univ Karlsruhe, Inst Expt Kernphys, D-76021 Karlsruhe, Germany.
   CNRS, IN2P3, Lab Accelerateur Lineaire, F-91898 Orsay, France.
   Univ Paris 11, Ctr Sci Orsay, F-91898 Orsay, France.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   Univ Liverpool, Liverpool L69 7ZE, 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, Montreal, PQ H3C 3J7, Canada.
   Mt Holyoke Coll, S Hadley, MA 01075 USA.
   Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy.
   Ist Nazl Fis Nucl, I-80126 Naples, Italy.
   NIKHEF H, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands.
   Univ Notre Dame, Notre Dame, IN 46556 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 & Hautes Energies, IN2P3, CNRS, F-75252 Paris, France.
   Univ Denis Diderot Paris 7, F-75252 Paris, France.
   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.
   Univ Valencia, IFIC, CSIC, E-46071 Valencia, Spain.
   Univ Victoria, Victoria, BC V8W 3P6, Canada.
   Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
   Univ Wisconsin, Madison, WI 53706 USA.
   Yale Univ, New Haven, CT 06511 USA.
   Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
   Univ Basilicata, I-85100 Potenza, Italy.
RP Aubert, B (reprint author), CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
RI Negrini, Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012;
   Oyanguren, Arantza/K-6454-2014; Luppi, Eleonora/A-4902-2015; 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; Lusiani, Alberto/N-2976-2015; Morandin,
   Mauro/A-3308-2016; Lusiani, Alberto/A-3329-2016; Peters,
   Klaus/C-2728-2008; 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; 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; de Sangro,
   Riccardo/J-2901-2012; Della Ricca, Giuseppe/B-6826-2013; Di Lodovico,
   Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Calcaterra,
   Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016
OI Negrini, Matteo/0000-0003-0101-6963; Monge, Maria
   Roberta/0000-0003-1633-3195; Oyanguren, Arantza/0000-0002-8240-7300;
   Luppi, Eleonora/0000-0002-1072-5633; 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;
   Lusiani, Alberto/0000-0002-6876-3288; Morandin,
   Mauro/0000-0003-4708-4240; Lusiani, Alberto/0000-0002-6876-3288; Peters,
   Klaus/0000-0001-7133-0662; 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; Della Ricca,
   Giuseppe/0000-0003-2831-6982; Di Lodovico,
   Francesca/0000-0003-3952-2175; Pappagallo, Marco/0000-0001-7601-5602;
   Calcaterra, Alessandro/0000-0003-2670-4826; Frey,
   Raymond/0000-0003-0341-2636
NR 47
TC 12
Z9 12
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 JAN
PY 2007
VL 75
IS 1
AR 012003
DI 10.1103/PhysRevD.75.012003
PG 16
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200010
ER

PT J
AU Balitsky, I
AF Balitsky, Ian
TI Quark contribution to the small-x evolution of color dipole
SO PHYSICAL REVIEW D
LA English
DT Article
ID GLUON DISTRIBUTION-FUNCTIONS; OPERATOR EXPANSION; GLASS CONDENSATE; BFKL
   POMERON; HIGH-ENERGY; RENORMALIZATION-GROUP; LARGE NUCLEI; QCD;
   EQUATION; RENORMALONS
AB The small-x deep inelastic scattering in the saturation region is governed by the nonlinear evolution of Wilson-lines operators. In the leading logarithmic approximation it is given by the Balitsky-Kovchegov (BK) equation for the evolution of color dipoles. In the next-to-leading order (NLO) the nonlinear equation gets contributions from quark and gluon loops. In this paper I calculate the quark-loop contribution to small-x evolution of Wilson lines in the NLO. It turns out that there are no new operators at the one-loop level-just as at the tree level, the high-energy scattering can be described in terms of Wilson lines. In addition, from the analysis of quark loops I find that the argument of coupling constant in the BK equation is determined by the size of the parent dipole rather than by the size of produced dipoles. These results are to be supported by future calculation of gluon loops.
C1 Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
   Jefferson Lab, Theory Grp, Newport News, VA 23606 USA.
RP Balitsky, I (reprint author), Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
EM balitsky@jlab.org
NR 41
TC 214
Z9 214
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 1
AR 014001
DI 10.1103/PhysRevD.75.014001
PG 21
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200031
ER

PT J
AU Berger, CF
   Bern, Z
   Dixon, LJ
   Forde, D
   Kosower, DA
AF Berger, Carola F.
   Bern, Zvi
   Dixon, Lance J.
   Forde, Darren
   Kosower, David A.
TI All one-loop maximally helicity violating gluonic amplitudes in QCD
SO PHYSICAL REVIEW D
LA English
DT Review
ID GAUGE-THEORY AMPLITUDES; JET CROSS-SECTIONS; SUPER-YANG-MILLS;
   HIGHER-ORDER CORRECTIONS; RATIONAL PARTS; TWISTOR SPACE; DIMENSIONAL
   REGULARIZATION; MULTIPLE BREMSSTRAHLUNG; GENERAL FORMALISM; FERMION
   PROCESSES
AB We use on-shell recursion relations to compute analytically the one-loop corrections to maximally helicity-violating n-gluon amplitudes in QCD. The cut-containing parts have been computed previously; our work supplies the remaining rational parts for these amplitudes, which contain two gluons of negative helicity and the rest positive, in an arbitrary color ordering. We also present formulae specific to the six-gluon cases with helicities (-+-+++) and (-++-++), as well as numerical results for six, seven, and eight gluons. Our construction of the n-gluon amplitudes illustrates the relatively modest growth in complexity of the on-shell-recursive calculation as the number of external legs increases. These amplitudes add to the growing body of one-loop amplitudes known for all n, which are useful for studies of general properties of amplitudes, including their twistor-space structure.
C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
   Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
   CEA Saclay, Serv Phys Theor, F-91191 Gif Sur Yvette, France.
RP Berger, CF (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
NR 139
TC 54
Z9 54
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
EI 1550-2368
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 1
AR 016006
DI 10.1103/PhysRevD.75.016006
PG 35
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200079
ER

PT J
AU Brodsky, SJ
   Chakrabarti, D
   Harindranath, A
   Mukherjee, A
   Vary, JP
AF Brodsky, S. J.
   Chakrabarti, D.
   Harindranath, A.
   Mukherjee, A.
   Vary, J. P.
TI Hadron optics in three-dimensional invariant coordinate space from
   deeply virtual Compton scattering
SO PHYSICAL REVIEW D
LA English
DT Article
ID RELATIVISTIC FRONT DESCRIPTION; PARAXIAL-WAVE OPTICS; INELASTIC
   SCATTERING; PARTON DISTRIBUTIONS; QCD; SPIN; REPRESENTATION; MOMENTUM;
   PROTONS; MODELS
AB The Fourier transform of the deeply virtual Compton scattering amplitude (DVCS) with respect to the skewness parameter zeta=Q(2)/2p center dot q can be used to provide an image of the target hadron in the boost-invariant variable sigma, the coordinate conjugate to light-front time tau=t+z/c. As an illustration, we construct a consistent covariant model of the DVCS amplitude and its associated generalized parton distributions using the quantum fluctuations of a fermion state at one loop in QED, thus providing a representation of the light-front wave functions (LFWFs) of a lepton in sigma space. A consistent model for hadronic amplitudes can then be obtained by differentiating the light-front wave functions with respect to the bound-state mass. The resulting DVCS helicity amplitudes are evaluated as a function of sigma and the impact parameter b(perpendicular to), thus providing a light-front image of the target hadron in a frame-independent three-dimensional light-front coordinate space. Models for the LFWFs of hadrons in (3+1) dimensions displaying confinement at large distances and conformal symmetry at short distances have been obtained using the AdS/CFT method. We also compute the LFWFs in this model in invariant three-dimensional coordinate space. We find that, in the models studied, the Fourier transform of the DVCS amplitudes exhibit diffraction patterns. The results are analogous to the diffractive scattering of a wave in optics where the distribution in sigma measures the physical size of the scattering center in a one-dimensional system.
C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
   Univ Florida, Dept Phys, Gainesville, FL 32611 USA.
   Saha Inst Nucl Phys, Kolkata 700064, W Bengal, India.
   Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.
   Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
   Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Brodsky, SJ (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
NR 59
TC 29
Z9 29
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
EI 1550-2368
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 1
AR 014003
DI 10.1103/PhysRevD.75.014003
PG 25
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200033
ER

PT J
AU Carena, M
   Lykken, J
   Park, M
   Santiago, J
AF Carena, Marcela
   Lykken, Joseph
   Park, Minjoon
   Santiago, Jose
TI Self-accelerating warped braneworlds
SO PHYSICAL REVIEW D
LA English
DT Article
ID SPIN-2 FIELD; GRAVITY; BRANE; SPACE; BULK
AB Braneworld models with induced gravity have the potential to replace dark energy as the explanation for the current accelerating expansion of the Universe. The original model of Dvali, Gabadadze, and Porrati (DGP) demonstrated the existence of a "self-accelerating" branch of background solutions, but suffered from the presence of ghosts. We present a new large class of braneworld models which generalize the DGP model. Our models have negative curvature in the bulk, allow a second brane, and have general brane tensions and localized curvature terms. We exhibit three different kinds of ghosts, associated to the graviton zero mode, the radion, and the longitudinal components of massive graviton modes. The latter two species occur in the DGP model, for negative and positive brane tension, respectively. In our models, we find that the two kinds of DGP ghosts are tightly correlated with each other, but are not always linked to the feature of self-acceleration. Our models are a promising laboratory for understanding the origins and physical meaning of braneworld ghosts, and perhaps for eliminating them altogether.
C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
RP Carena, M (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA.
RI Santiago, Jose/D-9109-2016
OI Santiago, Jose/0000-0003-3585-5626
NR 36
TC 19
Z9 19
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 JAN
PY 2007
VL 75
IS 2
AR 026009
DI 10.1103/PhysRevD.75.026009
PG 17
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UQ
UT WOS:000243896300119
ER

PT J
AU Chen, MC
   Mahanthappa, KT
AF Chen, Mu-Chun
   Mahanthappa, K. T.
TI Low scale seesaw, electron electric dipole moment, and leptogenesis in a
   model with spontaneous CP violation
SO PHYSICAL REVIEW D
LA English
DT Article
ID LEFT-RIGHT SYMMETRY; LEPTON NUMBER; SO(10) MODELS; LOW ENERGIES;
   BARYOGENESIS; CONSEQUENCES; MASSES; PHASES
AB Strong correlations between leptogenesis and low energy CP violating leptonic processes have been shown by us to exist in the minimal left-right symmetric model with spontaneous CP violation. In this note, we investigate the implications of this model for the electric dipole moment of the electron. With an additional broken U(1)(S) symmetry, the seesaw scale can be lowered to close to the electroweak scale. This additional symmetry also makes the connection between CP violation in quark sector to that in the lepton sector possible.
C1 Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA.
   Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
   Univ Colorado, Dept Phys, Boulder, CO 80309 USA.
RP Chen, MC (reprint author), Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA.
EM mcchen@fnal.gov; ktm@pizero.colorado.edu
OI Chen, Mu-Chun/0000-0002-5749-2566
NR 62
TC 11
Z9 11
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 1
AR 015001
DI 10.1103/PhysRevD.75.015001
PG 9
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200067
ER

PT J
AU Dawson, S
   Kao, C
   Wang, YL
   Williams, P
AF Dawson, Sally
   Kao, Chung
   Wang, Yili
   Williams, Peter
TI QCD corrections to Higgs pair production in bottom quark fusion
SO PHYSICAL REVIEW D
LA English
DT Article
ID GLUON FUSION; BOSON; COLLIDERS; MASS
AB We present a complete next-to-leading-order (NLO) calculation for the total cross section of inclusive Higgs pair production via bottom-quark fusion (b (b) over bar -> hh) at the CERN Large Hadron Collider (LHC) in the standard model. The NLO QCD corrections lead to less dependence on the renormalization scale (mu(R)) and the factorization scale (mu(F)) than the leading-order (LO) cross section, and they significantly increase the LO cross section. The rate for inclusive Higgs pair production is small in the standard model, but can be large in models with enhanced couplings of the b quark to the Higgs bosons.
C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
   Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   Univ Oklahoma, Homer L Dodge Dept Phys & Astron, Norman, OK 73019 USA.
RP Dawson, S (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
OI Dawson, Sally/0000-0002-5598-695X
NR 33
TC 9
Z9 9
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 1
AR 013007
DI 10.1103/PhysRevD.75.013007
PG 12
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200024
ER

PT J
AU Enberg, R
AF Enberg, Rikard
TI Traveling waves and the renormalization group improved
   Balitsky-Kovchegov equation
SO PHYSICAL REVIEW D
LA English
DT Article
ID TO-LEADING BFKL; HIGH-ENERGY SCATTERING; DIPOLE CHAIN MODEL; SMALL-X;
   SATURATION MOMENTUM; FRONT PROPAGATION; UNSTABLE STATES; EVOLUTION;
   RESUMMATION; APPROXIMATION
AB I study the incorporation of renormalization group (RG) improved BFKL kernels in the Balitsky-Kovchegov (BK) equation which describes parton saturation. The RG improvement takes into account important parts of the next-to-leading and higher-order logarithmic corrections to the kernel. The traveling wave front method for analyzing the BK equation is generalized to deal with RG-resummed kernels, restricting to the interesting case of fixed QCD coupling. The results show that the higher-order corrections suppress the rapid increase of the saturation scale with increasing rapidity. I also perform a diffusive differential equation approximation, which illustrates that some important qualitative properties of the kernel change when including RG corrections.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA.
RP Enberg, R (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA.
EM REnberg@lbl.gov
OI Enberg, Rikard/0000-0003-0452-0671
NR 62
TC 12
Z9 12
U1 0
U2 1
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 1
AR 014012
DI 10.1103/PhysRevD.75.014012
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200042
ER

PT J
AU Ganor, OJ
AF Ganor, Ori J.
TI New Lorentz-violating nonlocal field theory from string theory
SO PHYSICAL REVIEW D
LA English
DT Article
ID U-DUALITY; BACKGROUNDS; BRANES; DIMENSIONS
AB A four-dimensional field theory with a qualitatively new type of nonlocality is constructed from a setting where Kaluza-Klein particles probe toroidally compactified string theory with twisted boundary conditions. In this theory fundamental particles are not pointlike and occupy a volume proportional to their R-charge. The theory breaks Lorentz invariance but appears to preserve spatial rotations. At low energies, it is approximately N=4 Super Yang-Mills theory, deformed by an operator of dimension seven. The dispersion relation of massless modes in vacuum is unchanged, but under certain conditions in this theory, particles can travel at superluminal velocities.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Lawrence Berkeley Natl Lab, Theoret Phys Grp, Berkeley, CA 94720 USA.
RP Ganor, OJ (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM origa@socrates.berkeley.edu
NR 58
TC 20
Z9 20
U1 0
U2 3
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 2
AR 025002
DI 10.1103/PhysRevD.75.025002
PG 8
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UQ
UT WOS:000243896300083
ER

PT J
AU Gronau, M
   Pirjol, D
   Soni, A
   Zupan, J
AF Gronau, Michael
   Pirjol, Dan
   Soni, Amarjit
   Zupan, Jure
TI Improved method for CKM constraints in charmless three-body B and B-s
   decays
SO PHYSICAL REVIEW D
LA English
DT Article
ID WEAK PHASE-GAMMA; MASKAWA ANGLE GAMMA; CP-VIOLATION; QCD FACTORIZATION;
   ISOSPIN ANALYSIS; PI-K; PENGUIN CONTRIBUTIONS; UNITARITY TRIANGLE; MESON
   DECAYS; ASYMMETRIES
AB Recently Ciuchini, Pierini, and Silvestrini proposed a method for constraining CKM parameters in B -> K pi pi and B-s -> K pi pi through phase measurements of amplitudes involving I=3/2 K-*pi final states. We show that complementary information on CKM parameters may be obtained by studying the phases of Delta I=1 B ->(K-*pi)(I=1/2), B-s ->((KK)-K-*)(I=1) and B-s ->((KK)-K-*)(I=1) amplitudes. Hadronic uncertainties in these constraints from electroweak penguin operators O-9 and O-10, studied using flavor SU(3), are shown to be very small in B -> K pi pi and B-s -> K pi pi and somewhat larger in B-s -> KK pi. The first processes imply a precise linear relation between rho and eta, with a measurable slope and an intercept at eta=0 involving a theoretical error of 0.03. The decays B-s -> K pi pi permit a measurement of gamma involving a theoretical error below a degree. We note that while time-dependence is required when studying B-0 decays at the Upsilon(4S), it may not be needed when studying B-s decays at hadronic colliders.
C1 Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel.
   Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
   MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA.
   Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
   Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA.
   Jozef Stefan Inst, Ljubljana 1001, Slovenia.
RP Gronau, M (reprint author), Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel.
NR 75
TC 29
Z9 29
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 1
AR 014002
DI 10.1103/PhysRevD.75.014002
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200032
ER

PT J
AU Hidaka, Y
   Kitazawa, M
AF Hidaka, Yoshimasa
   Kitazawa, Masakiyo
TI Chiral transition and mesonic excitations for quarks with thermal masses
SO PHYSICAL REVIEW D
LA English
DT Article
ID HOT GAUGE-THEORIES; GLUON PLASMA; FINITE-TEMPERATURE; COLLABORATION;
   PERSPECTIVE; AMPLITUDES; COLLISIONS; SPECTRUM; MATTER
AB We study the effect of a thermal quark mass, m(T), on the chiral phase transition and mesonic excitations in the light quark sector at finite temperature in a simple chirally symmetric model. We show that, while nonzero m(T) lowers the chiral condensate, the chiral transition remains of second order. It is argued that the mesonic excitations have a large decay rate at energies below 2m(T), owing to the Landau damping of the quarks and the van Hove singularities of the collective modes.
C1 Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA.
RP Hidaka, Y (reprint author), Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Bldg 510A, Upton, NY 11973 USA.
EM hidaka@quark.phy.bnl.gov; kitazawa@quark.phy.bnl.gov
NR 28
TC 5
Z9 5
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 1
AR 011901
DI 10.1103/PhysRevD.75.011901
PG 5
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200007
ER

PT J
AU Huterer, D
   Linder, EV
AF Huterer, Dragan
   Linder, Eric V.
TI Separating dark physics from physical darkness: Minimalist modified
   gravity versus dark energy
SO PHYSICAL REVIEW D
LA English
DT Article
ID POWER SPECTRUM; HALO MODEL; CONSTRAINTS; COSMOLOGIES; TOMOGRAPHY;
   PARAMETERS
AB The acceleration of the cosmic expansion may be due to a new component of physical energy density or a modification of physics itself. Mapping the expansion of cosmic scales and the growth of large scale structure in tandem can provide insights to distinguish between the two origins. Using Minimal Modified Gravity (MMG)-a single parameter gravitational growth index formalism to parametrize modified gravity theories-we examine the constraints that cosmological data can place on the nature of the new physics. For next generation measurements combining weak lensing, supernovae distances, and the cosmic microwave background we can extend the reach of physics to allow for fitting gravity simultaneously with the expansion equation of state, diluting the equation of state estimation by less than 25% relative to when general relativity is assumed, and determining the growth index to 8%. For weak lensing we examine the level of understanding needed of quasi- and nonlinear structure formation in modified gravity theories, and the trade off between stronger precision but greater susceptibility to bias as progressively more nonlinear information is used.
C1 Univ Chicago, Kavli Inst Cosmol Phys & Astron, Chicago, IL 60637 USA.
   Univ Chicago, Dept Astrophys, Chicago, IL 60637 USA.
   Univ Calif Berkeley, Berkeley Lab, Berkeley, CA 94720 USA.
RP Huterer, D (reprint author), Univ Chicago, Kavli Inst Cosmol Phys & Astron, Chicago, IL 60637 USA.
NR 48
TC 149
Z9 149
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 2
AR 023519
DI 10.1103/PhysRevD.75.023519
PG 9
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UQ
UT WOS:000243896300033
ER

PT J
AU Jakovac, A
   Petreczky, P
   Petrov, K
   Velytsky, A
AF Jakovac, A.
   Petreczky, P.
   Petrov, K.
   Velytsky, A.
TI Quarkonium correlators and spectral functions at zero and finite
   temperature
SO PHYSICAL REVIEW D
LA English
DT Article
ID MAXIMUM-ENTROPY ANALYSIS; QCD PHASE-TRANSITION; MONTE-CARLO DATA;
   LATTICE QCD; GLUON PLASMA; PSI-SUPPRESSION; DECONFINEMENT; DISSOCIATION;
   CHARMONIUM; MOMENTUM
AB We study quarkonium correlators and spectral functions at zero and finite temperature using the anisotropic Fermilab lattice formulation with anisotropy xi=2 and 4. To control cut-off effects we use several different lattice spacings. The spectral functions were extracted from lattice correlators with maximum entropy method based on a new algorithm. We find evidence for the survival of 1S quarkonium states in the deconfined medium till relatively high temperatures as well as for dissolution of 1P quarkonium states right above the deconfinement temperature.
C1 BME Budapest, Inst Phys, H-1111 Budapest, Hungary.
   Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
   Niels Bohr Inst, DK-2100 Copenhagen O, Denmark.
   Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
RP Jakovac, A (reprint author), BME Budapest, Inst Phys, Budafoki Ut 8, H-1111 Budapest, Hungary.
EM jakovac@cern.ch; petreczk@quark.phy.bnl.gov; kpetrov@nbi.dk;
   vel@ucla.edu
NR 57
TC 121
Z9 121
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 JAN
PY 2007
VL 75
IS 1
AR 014506
DI 10.1103/PhysRevD.75.014506
PG 22
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200064
ER

PT J
AU Nomura, Y
   Poland, D
AF Nomura, Yasunori
   Poland, David
TI Supersymmetry without the desert
SO PHYSICAL REVIEW D
LA English
DT Article
ID ELECTROWEAK SYMMETRY-BREAKING; GRAND UNIFICATION; EXTRA DIMENSIONS;
   ANOMALY CANCELLATION; LOCAL SUPERSYMMETRY; STANDARD MODEL; SOFT TERMS;
   SUPERGRAVITY; HIERARCHY; COMPACTIFICATION
AB Naturalness of electroweak symmetry breaking in weak scale supersymmetric theories may suggest the absence of the conventional supersymmetric desert. We present a simple, realistic framework for supersymmetry in which (most of) the virtues of the supersymmetric desert are naturally reproduced without having a large energy interval above the weak scale. The successful supersymmetric prediction for the low-energy gauge couplings is reproduced due to a gauged R symmetry present in the effective theory at the weak scale. The observable sector superpotential naturally takes the form of the next-to-minimal supersymmetric standard model, but without being subject to the Landau pole constraints up to the conventional unification scale. Supersymmetry breaking masses are generated by the F-term and D-term vacuum expectation values of singlet and U(1)(R) gauge fields, as well as by anomaly mediation, at a scale not far above the weak scale. We study the resulting pattern of supersymmetry breaking masses in detail and find that it can be quite distinct. We construct classes of explicit models within this framework, based on higher-dimensional unified theories with TeV-sized extra dimensions. A similar model based on a non-R symmetry is also presented. These models have a rich phenomenology at the TeV scale, and allow for detailed analyses of, e.g., electroweak symmetry breaking.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA.
RP Nomura, Y (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RI Poland, David/A-8689-2015; 
OI Poland, David/0000-0003-3854-2430; Nomura, Yasunori/0000-0002-1497-1479
NR 93
TC 3
Z9 3
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 1
AR 015005
DI 10.1103/PhysRevD.75.015005
PG 26
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200071
ER

PT J
AU Park, KS
   Kichimi, H
   Abe, K
   Abe, K
   Adachi, I
   Aihara, H
   Anipko, D
   Arinstein, K
   Aulchenko, V
   Aushev, T
   Banerjee, S
   Barberio, E
   Barbero, M
   Bedny, I
   Belous, K
   Bitenc, U
   Bondar, A
   Bozek, A
   Bracko, M
   Browder, TE
   Chao, Y
   Chen, A
   Chen, WT
   Cheon, BG
   Chistov, R
   Choi, Y
   Choi, YK
   Cole, S
   Dalseno, J
   Dash, M
   Drutskoy, A
   Eidelman, S
   Epifanov, D
   Fratina, S
   Gabyshev, N
   Gershon, T
   Go, A
   Gokhroo, G
   Goldenzweig, P
   Golob, B
   Ha, H
   Haba, J
   Hayasaka, K
   Hayashii, H
   Hazumi, M
   Heffernan, D
   Hoshi, Y
   Hou, S
   Iijima, T
   Inami, K
   Ishikawa, A
   Itoh, R
   Iwasaki, M
   Iwasaki, Y
   Kang, JH
   Kapusta, P
   Kawasaki, T
   Khan, HR
   Kim, HO
   Kim, SK
   Kim, YJ
   Korpar, S
   Krokovny, P
   Kulasiri, R
   Kumar, R
   Kuo, CC
   Kuzmin, A
   Kwon, YJ
   Lesiak, T
   Li, J
   Limosani, A
   Lin, SW
   Liventsev, D
   Majumder, G
   Mandl, F
   Matsumoto, T
   McOnie, S
   Miyabayashi, K
   Miyake, H
   Miyata, H
   Miyazaki, Y
   Mizuk, R
   Nakamura, I
   Nakano, E
   Nakao, M
   Natkaniec, Z
   Nishida, S
   Nitoh, O
   Nozaki, T
   Ogawa, S
   Ohshima, T
   Okuno, S
   Olsen, SL
   Onuki, Y
   Ostrowicz, W
   Pakhlov, P
   Pakhlova, G
   Park, CW
   Pestotnik, R
   Piilonen, LE
   Poluektov, A
   Sakai, Y
   Satoyama, N
   Schietinger, T
   Schneider, O
   Schwartz, AJ
   Senyo, K
   Sevior, ME
   Shapkin, M
   Shibuya, H
   Shwartz, B
   Sidorov, V
   Singh, JB
   Sokolov, A
   Somov, A
   Soni, N
   Stanic, S
   Staric, M
   Stoeck, H
   Sumiyoshi, T
   Takasaki, F
   Tamai, K
   Tanaka, M
   Taylor, GN
   Teramoto, Y
   Tian, XC
   Tsukamoto, T
   Uehara, S
   Uglov, T
   Unno, Y
   Uno, S
   Usov, Y
   Varner, G
   Villa, S
   Wang, CH
   Wang, MZ
   Watanabe, Y
   Won, E
   Xie, QL
   Yamaguchi, A
   Yamashita, Y
   Yamauchi, M
   Zhang, LM
   Zhang, ZP
   Zhilich, V
   Zupanc, A
AF Park, K. S.
   Kichimi, H.
   Abe, K.
   Abe, K.
   Adachi, I.
   Aihara, H.
   Anipko, D.
   Arinstein, K.
   Aulchenko, V.
   Aushev, T.
   Banerjee, S.
   Barberio, E.
   Barbero, M.
   Bedny, I.
   Belous, K.
   Bitenc, U.
   Bondar, A.
   Bozek, A.
   Bracko, M.
   Browder, T. E.
   Chao, Y.
   Chen, A.
   Chen, W. T.
   Cheon, B. G.
   Chistov, R.
   Choi, Y.
   Choi, Y. K.
   Cole, S.
   Dalseno, J.
   Dash, M.
   Drutskoy, A.
   Eidelman, S.
   Epifanov, D.
   Fratina, S.
   Gabyshev, N.
   Gershon, T.
   Go, A.
   Gokhroo, G.
   Goldenzweig, P.
   Golob, B.
   Ha, H.
   Haba, J.
   Hayasaka, K.
   Hayashii, H.
   Hazumi, M.
   Heffernan, D.
   Hoshi, Y.
   Hou, S.
   Iijima, T.
   Inami, K.
   Ishikawa, A.
   Itoh, R.
   Iwasaki, M.
   Iwasaki, Y.
   Kang, J. H.
   Kapusta, P.
   Kawasaki, T.
   Khan, H. R.
   Kim, H. O.
   Kim, S. K.
   Kim, Y. J.
   Korpar, S.
   Krokovny, P.
   Kulasiri, R.
   Kumar, R.
   Kuo, C. C.
   Kuzmin, A.
   Kwon, Y. -J.
   Lesiak, T.
   Li, J.
   Limosani, A.
   Lin, S. -W.
   Liventsev, D.
   Majumder, G.
   Mandl, F.
   Matsumoto, T.
   McOnie, S.
   Miyabayashi, K.
   Miyake, H.
   Miyata, H.
   Miyazaki, Y.
   Mizuk, R.
   Nakamura, I.
   Nakano, E.
   Nakao, M.
   Natkaniec, Z.
   Nishida, S.
   Nitoh, O.
   Nozaki, T.
   Ogawa, S.
   Ohshima, T.
   Okuno, S.
   Olsen, S. L.
   Onuki, Y.
   Ostrowicz, W.
   Pakhlov, P.
   Pakhlova, G.
   Park, C. W.
   Pestotnik, R.
   Piilonen, L. E.
   Poluektov, A.
   Sakai, Y.
   Satoyama, N.
   Schietinger, T.
   Schneider, O.
   Schwartz, A. J.
   Senyo, K.
   Sevior, M. E.
   Shapkin, M.
   Shibuya, H.
   Shwartz, B.
   Sidorov, V.
   Singh, J. B.
   Sokolov, A.
   Somov, A.
   Soni, N.
   Stanic, S.
   Staric, M.
   Stoeck, H.
   Sumiyoshi, T.
   Takasaki, F.
   Tamai, K.
   Tanaka, M.
   Taylor, G. N.
   Teramoto, Y.
   Tian, X. C.
   Tsukamoto, T.
   Uehara, S.
   Uglov, T.
   Unno, Y.
   Uno, S.
   Usov, Y.
   Varner, G.
   Villa, S.
   Wang, C. H.
   Wang, M. -Z.
   Watanabe, Y.
   Won, E.
   Xie, Q. L.
   Yamaguchi, A.
   Yamashita, Y.
   Yamauchi, M.
   Zhang, L. M.
   Zhang, Z. P.
   Zhilich, V.
   Zupanc, A.
CA Belle Collaboration
TI Study of the charmed baryonic decays (B)over-bar(0)->Sigma(++)(c)
   (p)over-bar pi(-) and (B)over-bar ->Sigma(0)(c)(p)over-bar pi(+)
SO PHYSICAL REVIEW D
LA English
DT Article
ID EXCLUSIVE DECAYS; CP-VIOLATION; B-MESONS; SEARCH
AB We study the three-body charmed baryonic decays B-0 ->Sigma(++)(c)p pi(-) and B-0 ->Sigma(0)(c)p pi(+) in the four-body final state B-0 ->Lambda(+)(c)p pi(+)pi(-), using a data sample of 357 fb(-1) accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We measure the branching fractions B(B-0 ->Sigma(c)(2455)(++)p pi(-))=(2.1 +/- 0.2 +/- 0.3 +/- 0.5)x10(-4), B(B-0 ->Sigma(c)(2455)(0)p pi(+))=(1.4 +/- 0.2 +/- 0.2 +/- 0.4)x10(-4) and B(B-0 ->Sigma(c)(2520)(++)p pi(-))=(1.2 +/- 0.1 +/- 0.2 +/- 0.3)x10(-4) with signal significances of 13.1 sigma, 9.4 sigma and 7.1 sigma, respectively. The errors are statistical, systematic, and due to the uncertainty in B(Lambda(+)(c)-> pK(-)pi(+)), respectively. We also set an upper limit B(B-0 ->Sigma(c)(2520)(0)p pi(+))< 0.38x10(-4) at the 90% confidence level. In addition, we obtain a nonresonant branching fraction of (6.4 +/- 0.4 +/- 0.9 +/- 1.7)x10(-4), and a total branching fraction of (11.2 +/- 0.5 +/- 1.4 +/- 2.9)x10(-4) for B-0 ->Lambda(+)(c)p pi(+)pi(-).
C1 Sungkyunkwan Univ, Suwon, South Korea.
   Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
   Chonnam Natl Univ, Kwangju, South Korea.
   Univ Cincinnati, Cincinnati, OH 45221 USA.
   Grad Univ Adv Studies, Hayama, Japan.
   Univ Hawaii, Honolulu, HI 96822 USA.
   KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki, Japan.
   Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China.
   Inst High Energy Phys, Vienna, Austria.
   Inst High Energy Phys, Protvino, Russia.
   Inst Theoret & Expt Phys, Moscow 117259, Russia.
   Jozef Stefan Inst, Ljubljana, Slovenia.
   Kanagawa Univ, Yokohama, Kanagawa, Japan.
   Korea Univ, Seoul 136701, South Korea.
   EPFL, Swiss Fed Inst Technol, CH-1015 Lausanne, Switzerland.
   Univ Ljubljana, Ljubljana, Slovenia.
   Univ Maribor, SLO-2000 Maribor, Slovenia.
   Univ Melbourne, Melbourne, Vic, Australia.
   Nagoya Univ, Nagoya, Aichi, Japan.
   Nara Womens Univ, Nara 630, Japan.
   Natl Cent Univ, Chungli 32054, Taiwan.
   Natl Taiwan Univ, Dept Phys, Taipei 10764, Taiwan.
   H Niewodniczanski Inst Nucl Phys, Krakow, Poland.
   Nippon Dent Univ, Niigata, Japan.
   Niigata Univ, Niigata, Japan.
   Osaka City Univ, Osaka 558, Japan.
   Osaka Univ, Osaka, Japan.
   Panjab Univ, Chandigarh 160014, India.
   Peking Univ, Beijing 100871, Peoples R China.
   RIKEN, BNL, Res Ctr, Upton, NY 11973 USA.
   Univ Sci & Technol China, Hefei, Peoples R China.
   Seoul Natl Univ, Seoul, South Korea.
   Shinshu Univ, Nagano, Japan.
   Univ Sydney, Sydney, NSW 2006, Australia.
   Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India.
   Toho Univ, Funabashi, Chiba 274, Japan.
   Tohoku Gakuin Univ, Tagajo, Miyagi, Japan.
   Tohoku Univ, Sendai, Miyagi 980, Japan.
   Univ Tokyo, Dept Phys, Tokyo 113, Japan.
   Tokyo Inst Technol, Tokyo 152, Japan.
   Tokyo Metropolitan Univ, Tokyo 158, Japan.
   Tokyo Univ Agr & Technol, Tokyo, Japan.
   Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA.
   Yonsei Univ, Seoul 120749, South Korea.
RP Park, KS (reprint author), Sungkyunkwan Univ, Suwon, South Korea.
RI Abe, Kazuo/F-6576-2010; Aihara, Hiroaki/F-3854-2010; Nitoh,
   Osamu/C-3522-2013; Tian, Xinchun/L-2060-2013; Kim, Sun Kee/G-2042-2015;
   Pakhlov, Pavel/K-2158-2013; Uglov, Timofey/B-2406-2014; Mizuk,
   Roman/B-3751-2014; Krokovny, Pavel/G-4421-2016; Chistov,
   Ruslan/B-4893-2014; Drutskoy, Alexey/C-8833-2016; Pakhlova,
   Galina/C-5378-2014
OI Aihara, Hiroaki/0000-0002-1907-5964; Tian, Xinchun/0000-0002-6246-0470;
   Kim, Sun Kee/0000-0002-0013-0775; Pakhlov, Pavel/0000-0001-7426-4824;
   Uglov, Timofey/0000-0002-4944-1830; Krokovny, Pavel/0000-0002-1236-4667;
   Chistov, Ruslan/0000-0003-1439-8390; Drutskoy,
   Alexey/0000-0003-4524-0422; Pakhlova, Galina/0000-0001-7518-3022
NR 32
TC 11
Z9 11
U1 0
U2 1
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 1
AR 011101
DI 10.1103/PhysRevD.75.011101
PG 6
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200001
ER

PT J
AU Soni, A
   Zupan, J
AF Soni, A.
   Zupan, J.
TI Semiinclusive hadronic B decays as null tests of the standard model
SO PHYSICAL REVIEW D
LA English
DT Article
ID DIRECT CP VIOLATION; QCD FACTORIZATION; ASYMMETRIES; EXTRACTION;
   SYMMETRY; MESONS; PHASES; QUARK
AB We propose a new set of observables that can be used as experimental null tests of the Standard Model in charged and neutral B decays. The CP asymmetries in hadronic decays of charged B mesons into inclusive final states containing at least one of the following mesons: K-S,K-L, eta('), c $$(c) over bar bound states or neutral K-* or D mesons, for all of which a U-spin rotation is equivalent to a CP conjugation, are CKM suppressed and furthermore vanish in the exact U-spin limit. We show how this reduces the theoretical error by using Soft Collinear Effective Theory to calculate the CP asymmetries for KS,LXs+d, (KXs+d)-X-* and eta X-'(s+d) final states in the endpoint region. For these CP asymmetries only the flavor and not the charge of the decaying B meson needs to be tagged up to corrections of NLO in 1/m(b), making the measurements more accessible experimentally.
C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
   Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA.
   Jozef Stefan Inst, Ljubljana 1001, Slovenia.
RP Soni, A (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
NR 56
TC 2
Z9 2
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 1
AR 014024
DI 10.1103/PhysRevD.75.014024
PG 8
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200054
ER

PT J
AU Xie, QL
   Abe, K
   Adachi, I
   Aihara, H
   Anipko, D
   Arinstein, K
   Aulchenko, V
   Aushev, T
   Aziz, T
   Bahinipati, S
   Bakich, AM
   Balagura, V
   Barberio, E
   Barbero, M
   Bay, A
   Bedny, I
   Belous, K
   Bitenc, U
   Bizjak, I
   Blyth, S
   Bozek, A
   Bracko, M
   Browder, TE
   Chang, MC
   Chao, Y
   Chen, A
   Chen, KF
   Chen, WT
   Cheon, BG
   Chistov, R
   Choi, Y
   Choi, YK
   Cole, S
   Dalseno, J
   Dash, M
   Drutskoy, A
   Eidelman, S
   Epifanov, D
   Gabyshev, N
   Gershon, T
   Go, A
   Gokhroo, G
   Ha, H
   Haba, J
   Hayasaka, K
   Hayashii, H
   Hazumi, M
   Heffernan, D
   Hokuue, T
   Hoshi, Y
   Hou, S
   Hou, WS
   Iijima, T
   Ikado, K
   Imoto, A
   Inami, K
   Ishikawa, A
   Ishino, H
   Itoh, R
   Iwasaki, M
   Iwasaki, Y
   Kang, JH
   Kapusta, P
   Katayama, N
   Kawai, H
   Kawasaki, T
   Kichimi, H
   Kim, HJ
   Kim, YJ
   Korpar, S
   Krizan, P
   Krokovny, P
   Kulasiri, R
   Kumar, R
   Kuo, CC
   Kuzmin, A
   Kwon, YJ
   Lee, SE
   Lesiak, T
   Lin, SW
   Liu, Y
   Majumder, G
   Mandl, F
   Matsumoto, T
   McOnie, S
   Mitaroff, W
   Miyabayashi, K
   Miyake, H
   Miyata, H
   Miyazaki, Y
   Mizuk, R
   Moloney, GR
   Mueller, J
   Nagasaka, Y
   Nakano, E
   Nakao, M
   Natkaniec, Z
   Nishida, S
   Nitoh, O
   Ohshima, T
   Okuno, S
   Olsen, SL
   Onuki, Y
   Ozaki, H
   Pakhlov, P
   Pakhlova, G
   Park, H
   Peak, LS
   Pestotnik, R
   Piilonen, LE
   Poluektov, A
   Sahoo, H
   Sakai, Y
   Satoyama, N
   Schietinger, T
   Schneider, O
   Schumann, J
   Senyo, K
   Shapkin, M
   Shibuya, H
   Shwartz, B
   Sidorov, V
   Sokolov, A
   Somov, A
   Stanic, S
   Staric, M
   Stoeck, H
   Sumisawa, K
   Sumiyoshi, T
   Suzuki, SY
   Takasaki, F
   Tamai, K
   Tanaka, M
   Taylor, GN
   Teramoto, Y
   Tian, XC
   Trabelsi, K
   Tsuboyama, T
   Tsukamoto, T
   Uehara, S
   Uglov, T
   Unno, Y
   Uno, S
   Urquijo, P
   Usov, Y
   Varner, G
   Wang, CH
   Wang, MZ
   Watanabe, Y
   Wedd, R
   Won, E
   Yamaguchi, A
   Yamashita, Y
   Yamauchi, M
   Zhang, CC
   Zhang, LM
   Zhang, ZP
   Zhilich, V
   Zupanc, A
AF Xie, Q. L.
   Abe, K.
   Adachi, I.
   Aihara, H.
   Anipko, D.
   Arinstein, K.
   Aulchenko, V.
   Aushev, T.
   Aziz, T.
   Bahinipati, S.
   Bakich, A. M.
   Balagura, V.
   Barberio, E.
   Barbero, M.
   Bay, A.
   Bedny, I.
   Belous, K.
   Bitenc, U.
   Bizjak, I.
   Blyth, S.
   Bozek, A.
   Bracko, M.
   Browder, T. E.
   Chang, M. -C.
   Chao, Y.
   Chen, A.
   Chen, K. -F.
   Chen, W. T.
   Cheon, B. G.
   Chistov, R.
   Choi, Y.
   Choi, Y. K.
   Cole, S.
   Dalseno, J.
   Dash, M.
   Drutskoy, A.
   Eidelman, S.
   Epifanov, D.
   Gabyshev, N.
   Gershon, T.
   Go, A.
   Gokhroo, G.
   Ha, H.
   Haba, J.
   Hayasaka, K.
   Hayashii, H.
   Hazumi, M.
   Heffernan, D.
   Hokuue, T.
   Hoshi, Y.
   Hou, S.
   Hou, W. -S.
   Iijima, T.
   Ikado, K.
   Imoto, A.
   Inami, K.
   Ishikawa, A.
   Ishino, H.
   Itoh, R.
   Iwasaki, M.
   Iwasaki, Y.
   Kang, J. H.
   Kapusta, P.
   Katayama, N.
   Kawai, H.
   Kawasaki, T.
   Kichimi, H.
   Kim, H. J.
   Kim, Y. J.
   Korpar, S.
   Krizan, P.
   Krokovny, P.
   Kulasiri, R.
   Kumar, R.
   Kuo, C. C.
   Kuzmin, A.
   Kwon, Y. -J.
   Lee, S. E.
   Lesiak, T.
   Lin, S. -W.
   Liu, Y.
   Majumder, G.
   Mandl, F.
   Matsumoto, T.
   McOnie, S.
   Mitaroff, W.
   Miyabayashi, K.
   Miyake, H.
   Miyata, H.
   Miyazaki, Y.
   Mizuk, R.
   Moloney, G. R.
   Mueller, J.
   Nagasaka, Y.
   Nakano, E.
   Nakao, M.
   Natkaniec, Z.
   Nishida, S.
   Nitoh, O.
   Ohshima, T.
   Okuno, S.
   Olsen, S. L.
   Onuki, Y.
   Ozaki, H.
   Pakhlov, P.
   Pakhlova, G.
   Park, H.
   Peak, L. S.
   Pestotnik, R.
   Piilonen, L. E.
   Poluektov, A.
   Sahoo, H.
   Sakai, Y.
   Satoyama, N.
   Schietinger, T.
   Schneider, O.
   Schumann, J.
   Senyo, K.
   Shapkin, M.
   Shibuya, H.
   Shwartz, B.
   Sidorov, V.
   Sokolov, A.
   Somov, A.
   Stanic, S.
   Staric, M.
   Stoeck, H.
   Sumisawa, K.
   Sumiyoshi, T.
   Suzuki, S. Y.
   Takasaki, F.
   Tamai, K.
   Tanaka, M.
   Taylor, G. N.
   Teramoto, Y.
   Tian, X. C.
   Trabelsi, K.
   Tsuboyama, T.
   Tsukamoto, T.
   Uehara, S.
   Uglov, T.
   Unno, Y.
   Uno, S.
   Urquijo, P.
   Usov, Y.
   Varner, G.
   Wang, C. H.
   Wang, M. -Z.
   Watanabe, Y.
   Wedd, R.
   Won, E.
   Yamaguchi, A.
   Yamashita, Y.
   Yamauchi, M.
   Zhang, C. C.
   Zhang, L. M.
   Zhang, Z. P.
   Zhilich, V.
   Zupanc, A.
CA Belle Collaboration
TI Search for B+-> J/psi eta ' K+ and B-0 -> J/psi eta ' K-S(0) decays
SO PHYSICAL REVIEW D
LA English
DT Article
ID BELLE
AB We report the results of searches for B+ -> J/psi eta'K+ and B-0 -> J/psi eta'K-s(0) decays, using a sample of 388 X 10(6) B (B) over bar B pairs collected with the Belle detector at the Y(4S) resonance. No statistically significant signal is found for either of the two decay modes and upper limits for the branching fractions are determined to be B(B+ -> J/psi eta K-'(+)) < 8: 8 x 10(-5) and B(B-0 -> J/psi eta'K-S(0)) < 2.5 x 10(-5) at 90% confidence level.
C1 Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China.
   Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
   Chiba Univ, Chiba, Japan.
   Univ Cincinnati, Cincinnati, OH 45221 USA.
   Fu Jen Catholic Univ, Dept Phys, Taipei, Taiwan.
   Univ Hawaii, Honolulu, HI 96822 USA.
   High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki, Japan.
   Hiroshima Inst Technol, Hiroshima, Japan.
   Inst High Energy Phys, Vienna, Austria.
   Inst High Energy Phys, Protvino, Russia.
   Inst Theoret & Expt Phys, Moscow 117259, Russia.
   Jozef Stefan Inst, Ljubljana, Slovenia.
   Kanagawa Univ, Yokohama, Kanagawa, Japan.
   Korea Univ, Seoul 136701, South Korea.
   Kyungpook Natl Univ, Taegu 702701, South Korea.
   Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, CH-1015 Lausanne, Switzerland.
   Univ Ljubljana, Ljubljana, Slovenia.
   Univ Maribor, SLO-2000 Maribor, Slovenia.
   Univ Melbourne, Parkville, Vic 3052, Australia.
   Nagoya Univ, Nagoya, Aichi, Japan.
   Nara Womens Univ, Nara 630, Japan.
   Natl Cent Univ, Chungli 32054, Taiwan.
   Natl Taiwan Univ, Dept Phys, Taipei 10764, Taiwan.
   H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland.
   Nippon Dent Univ, Niigata, Japan.
   Niigata Univ, Niigata, Japan.
   Osaka City Univ, Osaka 558, Japan.
   Osaka Univ, Osaka, Japan.
   Panjab Univ, Chandigarh 160014, India.
   Peking Univ, Beijing 100871, Peoples R China.
   Univ Pittsburgh, Pittsburgh, PA 15260 USA.
   Brookhaven Natl Lab, Res Ctr, RIKEN, Upton, NY 11973 USA.
   Univ Sci & Technol China, Hefei 230026, Peoples R China.
   Seoul Natl Univ, Seoul, South Korea.
   Shinshu Univ, Nagano, Japan.
   Sungkyunkwan Univ, Suwon 440746, South Korea.
   Univ Sydney, Sydney, NSW 2006, Australia.
   Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India.
   Toho Univ, Funabashi, Chiba 274, Japan.
   Tohoku Gakuin Univ, Tagajo, Miyagi 985, Japan.
   Tohoku Univ, Sendai, Miyagi 980, Japan.
   Univ Tokyo, Dept Phys, Tokyo 113, Japan.
   Tokyo Inst Technol, Tokyo 152, Japan.
   Tokyo Metropolitan Univ, Tokyo 158, Japan.
   Tokyo Univ Agr & Technol, Tokyo, Japan.
   Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA.
   Yonsei Univ, Seoul 120749, South Korea.
RP Xie, QL (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China.
RI Abe, Kazuo/F-6576-2010; Aihara, Hiroaki/F-3854-2010; Nitoh,
   Osamu/C-3522-2013; Tian, Xinchun/L-2060-2013; Ishino,
   Hirokazu/C-1994-2015; Pakhlov, Pavel/K-2158-2013; Uglov,
   Timofey/B-2406-2014; Mizuk, Roman/B-3751-2014; Krokovny,
   Pavel/G-4421-2016; Chistov, Ruslan/B-4893-2014; Drutskoy,
   Alexey/C-8833-2016; Pakhlova, Galina/C-5378-2014
OI Aihara, Hiroaki/0000-0002-1907-5964; Tian, Xinchun/0000-0002-6246-0470;
   Ishino, Hirokazu/0000-0002-8623-4080; Pakhlov,
   Pavel/0000-0001-7426-4824; Uglov, Timofey/0000-0002-4944-1830; Krokovny,
   Pavel/0000-0002-1236-4667; Chistov, Ruslan/0000-0003-1439-8390;
   Drutskoy, Alexey/0000-0003-4524-0422; Pakhlova,
   Galina/0000-0001-7518-3022
NR 21
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 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD JAN
PY 2007
VL 75
IS 1
AR 017101
DI 10.1103/PhysRevD.75.017101
PG 6
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 131UP
UT WOS:000243896200080
ER

PT J
AU Ben-Naim, E
   Krapivsky, PL
AF Ben-Naim, E.
   Krapivsky, P. L.
TI Condensates in driven aggregation processes
SO PHYSICAL REVIEW E
LA English
DT Article
ID MOLECULAR-SIZE DISTRIBUTION; STEADY-STATE SOLUTIONS; COAGULATION
   EQUATIONS; 2-DIMENSIONAL SYSTEMS; NETWORKS; KINETICS; GELATION;
   POLYMERIZATION; DIFFUSION; EMERGENCE
AB We investigate aggregation driven by mass injection. In this stochastic process, mass is added with constant rate r and clusters merge at a constant total rate 1, so that both the total number of clusters and the total mass steadily grow with time. Analytic results are presented for the three classic aggregation rates K-i,K-j between clusters of size i and j. When K-i,K-j=const, the cluster size distribution decays exponentially. When K-i,K-j proportional to i+j or K-i,K-j proportional to ixj, there are two phases: (i) a condensate phase with a condensate containing a finite fraction of the mass in the system as well as finite clusters and (ii) a cluster phase with finite clusters only. For K-i,K-j proportional to i+j, the cluster size distribution, c(k), has a power-law tail, c(k)similar to k(-gamma) in either phase. The exponent is a nonmonotonic function of the injection rate gamma=r/(r-1) in the condensate phase r < 2 and gamma=r in the cluster phase r>2.
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, Dept Phys, Boston, MA 02215 USA.
   Boston Univ, Ctr Mol Cybernet, 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 45
TC 6
Z9 6
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
EI 1550-2376
J9 PHYS REV E
JI Phys. Rev. E
PD JAN
PY 2007
VL 75
IS 1
AR 011103
DI 10.1103/PhysRevE.75.011103
PN 1
PG 8
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 131TR
UT WOS:000243893400005
PM 17358106
ER

PT J
AU Kim, JS
   Goh, KI
   Salvi, G
   Oh, E
   Kahng, B
   Kim, D
AF Kim, J. S.
   Goh, K. -I.
   Salvi, G.
   Oh, E.
   Kahng, B.
   Kim, D.
TI Fractality in complex networks: Critical and supercritical skeletons
SO PHYSICAL REVIEW E
LA English
DT Article
ID ESCHERICHIA-COLI; ORGANIZATION
AB Fractal scaling-a power-law behavior of the number of boxes needed to tile a given network with respect to the lateral size of the box-is studied. We introduce a box-covering algorithm that is a modified version of the original algorithm introduced by Song [Nature (London) 433, 392 (2005)]; this algorithm enables easy implementation. Fractal networks are viewed as comprising a skeleton and shortcuts. The skeleton, embedded underneath the original network, is a special type of spanning tree based on the edge betweenness centrality; it provides a scaffold for the fractality of the network. When the skeleton is regarded as a branching tree, it exhibits a plateau in the mean branching number as a function of the distance from a root. For nonfractal networks, on the other hand, the mean branching number decays to zero without forming a plateau. Based on these observations, we construct a fractal network model by combining a random branching tree and local shortcuts. The scaffold branching tree can be either critical or supercritical, depending on the small worldness of a given network. For the network constructed from the critical (supercritical) branching tree, the average number of vertices within a given box grows with the lateral size of the box according to a power-law (an exponential) form in the cluster-growing method. The critical and supercritical skeletons are observed in protein interaction networks and the World Wide Web, respectively. The distribution of box masses, i.e., the number of vertices within each box, follows a power law P-m(M)similar to M-eta. The exponent eta depends on the box lateral size center dot(B). For small values of center dot(B), eta is equal to the degree exponent gamma of a given scale-free network, whereas eta approaches the exponent tau=gamma/(gamma-1) as center dot(B) increases, which is the exponent of the cluster-size distribution of the random branching tree. Finally, we study the perimeter H-alpha of a given box alpha, i.e., the number of edges connected to different boxes from a given box alpha as a function of the box mass M-B,M-alpha. It is obtained that the average perimeter over the boxes with box mass M-B is likely to scale as < H(M-B)>similar to M-B, irrespective of the box size center dot(B).
C1 Seoul Natl Univ, Sch Phys & Astron, CTP, Seoul 151747, South Korea.
   Seoul Natl Univ, Sch Phys & Astron, FPRD, Seoul 151747, South Korea.
   Univ Notre Dame, Ctr Complex Network Res, Notre Dame, IN 46556 USA.
   Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
   Korea Univ, Dept Phys, Seoul 136713, South Korea.
   Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Kim, JS (reprint author), Seoul Natl Univ, Sch Phys & Astron, CTP, Seoul 151747, South Korea.
NR 36
TC 60
Z9 65
U1 1
U2 10
PU AMERICAN 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 JAN
PY 2007
VL 75
IS 1
AR 016110
DI 10.1103/PhysRevE.75.016110
PN 2
PG 14
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 131TU
UT WOS:000243893700017
PM 17358227
ER

PT J
AU Libal, A
   Reichhardt, C
   Reichhardt, CJO
AF Libal, A.
   Reichhardt, C.
   Reichhardt, C. J. Olson
TI Point-defect dynamics in two-dimensional colloidal crystals
SO PHYSICAL REVIEW E
LA English
DT Article
ID GRAIN-BOUNDARY SCARS; INTERSTITIAL ATOMS; ARRAYS; SUPERCONDUCTORS;
   METALS
AB We study the topological configurations and dynamics of individual point defect vacancies and interstitials in a two-dimensional crystal of colloids interacting via a repulsive Yukawa potential. Our Brownian dynamics simulations show that the diffusion mechanism for vacancy defects occurs in two phases. The defect can glide along the crystal lattice directions, and it can rotate during an excited topological transition configuration to assume a different direction for the next period of gliding. The results for the vacancy defects are in good agreement with recent experiments. For interstitial point defects, which were not studied in the experiments, we find several of the same modes of motion as in the vacancy defect case along with two additional diffusion pathways. The interstitial defects are more mobile than the vacancy defects due to the more two-dimensional nature of the diffusion of the interstitial defects.
C1 Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
   Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
RP Libal, A (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, POB 1663, Los Alamos, NM 87545 USA.
OI Reichhardt, Cynthia/0000-0002-3487-5089; Libal,
   Andras/0000-0002-9850-9264
NR 26
TC 38
Z9 38
U1 0
U2 14
PU AMERICAN 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 JAN
PY 2007
VL 75
IS 1
AR 011403
DI 10.1103/PhysRevE.75.011403
PN 1
PG 7
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 131TR
UT WOS:000243893400045
PM 17358146
ER

PT J
AU Menshutin, AY
   Shchur, LN
   Vinokur, VM
AF Menshutin, A. Yu.
   Shchur, L. N.
   Vinokur, V. M.
TI Probing surface characteristics of diffusion-limited-aggregation
   clusters with particles of variable size
SO PHYSICAL REVIEW E
LA English
DT Article
ID OFF-LATTICE DLA; MULTISCALING ANALYSIS; GROWTH; BREAKDOWN; MODELS
AB We develop a technique for probing the harmonic measure of a diffusion-limited-aggregation (DLA) cluster surface with variable-size particles and generate 1000 clusters with 50x10(6) particles using an original off-lattice killing-free algorithm. Taking, in sequence, the limit of the vanishing size of the probing particles and then sending the growing cluster size to infinity, we achieve unprecedented accuracy in determining the fractal dimension D=1.7100(2) crucial to the characterization of the geometric properties of DLA clusters.
C1 LD Landau Theoret Phys Inst, Chernogolovka 142432, Russia.
   Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Menshutin, AY (reprint author), LD Landau Theoret Phys Inst, Chernogolovka 142432, Russia.
EM may@itp.ac.ru
NR 24
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 1539-3755
J9 PHYS REV E
JI Phys. Rev. E
PD JAN
PY 2007
VL 75
IS 1
AR 010401
DI 10.1103/PhysRevE.75.010401
PN 1
PG 4
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 131TR
UT WOS:000243893400002
PM 17358103
ER

PT J
AU Oh, E
   Lee, DS
   Kahng, B
   Kim, D
AF Oh, E.
   Lee, D. -S.
   Kahng, B.
   Kim, D.
TI Synchronization transition of heterogeneously coupled oscillators on
   scale-free networks
SO PHYSICAL REVIEW E
LA English
DT Article
ID AVALANCHE DYNAMICS
AB We investigate the synchronization transition of the modified Kuramoto model where the oscillators form a scale-free network with degree exponent lambda. An oscillator of degree k(i) is coupled to its neighboring oscillators with asymmetric and degree-dependent coupling in the form of Jk(i)(eta-1). By invoking the mean-field approach, we find eight different synchronization transition behaviors depending on the values of eta and lambda, and derive the critical exponents associated with the order parameter and the finite-size scaling in each case. The synchronization transition point J(c) is determined as being zero (finite) when eta >lambda-2 (eta <lambda-2). The synchronization transition is also studied from the perspective of cluster formation of synchronized vertices. The cluster-size distribution and the largest cluster size as a function of the system size are derived for each case using the generating function technique. Our analytic results are confirmed by numerical simulations.
C1 Seoul Natl Univ, Sch Phys & Astron, CTP, Seoul 151747, South Korea.
   Seoul Natl Univ, Sch Phys & Astron, FPRD, Seoul 151747, South Korea.
   Univ Saarland, D-66041 Saarbrucken, Germany.
   Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Oh, E (reprint author), Seoul Natl Univ, Sch Phys & Astron, CTP, Seoul 151747, South Korea.
RI Lee, Deok-Sun/D-1335-2011
NR 30
TC 17
Z9 17
U1 0
U2 2
PU AMERICAN 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 JAN
PY 2007
VL 75
IS 1
AR 011104
DI 10.1103/PhysRevE.75.011104
PN 1
PG 11
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 131TR
UT WOS:000243893400006
PM 17358107
ER

PT J
AU Perez, D
   Lewis, LJ
AF Perez, Danny
   Lewis, Laurent J.
TI Interface properties and microstructural stabilization in elastically
   inhomogeneous multiphase systems
SO PHYSICAL REVIEW E
LA English
DT Article
ID LARGE-SCALE SIMULATIONS; DENSITY-FUNCTIONAL THEORY; NI-BASE SUPERALLOY;
   PHASE-SEPARATION; STRESSED SOLIDS; MORPHOLOGICAL STABILITY; COARSENING
   KINETICS; SHAPE BIFURCATIONS; INTERACTION ENERGY; 2-PHASE SOLIDS
AB Using a two-dimensional multiscale model based on the classical time-dependent density-functional theory for lattice systems we recently introduced, we numerically study the impact of elastic inhomogeneities on the growth of isolated inclusions in multiphase alloys. We demonstrate that the coupling between the overall interface structure (as determined by the shape of the inclusions) and the local, atomic-scale structure can be very large, and is able to significantly affect the behavior of inclusions during growth. Elasticity is shown to have a strong influence on the local energetics at interfaces, leading to shape modulations and kinetic faceting. Morphological and energetic changes induce oscillations in the chemical potential of the inclusions, opening the way to the stabilization of multi-inclusion microstructures, consistent with experiment. We demonstrate that the interface elastic misfit is a key parameter for controlling the strength of elastic effects.
C1 Univ Montreal, Dept Phys, Montreal, PQ H3C 3J7, Canada.
   Univ Montreal, RQMP, Montreal, PQ H3C 3J7, Canada.
RP Lewis, LJ (reprint author), Los Alamos Natl Lab, Theoret Div T12, Mail Stop B 268, Los Alamos, NM 87545 USA.
EM Laurent.Lewis@UMontreal.CA
RI Lewis, Laurent/E-5546-2013
NR 70
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 1539-3755
J9 PHYS REV E
JI Phys. Rev. E
PD JAN
PY 2007
VL 75
IS 1
AR 011604
DI 10.1103/PhysRevE.75.011604
PN 1
PG 15
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 131TR
UT WOS:000243893400063
PM 17358164
ER

PT J
AU Plis, SM
   George, JS
   Jun, SC
   Pare-Blagoev, J
   Ranken, DM
   Wood, CC
   Schmidt, DM
AF Plis, Sergey M.
   George, J. S.
   Jun, S. C.
   Pare-Blagoev, J.
   Ranken, D. M.
   Wood, C. C.
   Schmidt, D. M.
TI Modeling spatiotemporal covariance for magnetoencephalography or
   electroencephalography source analysis
SO PHYSICAL REVIEW E
LA English
DT Article
ID INDEPENDENT COMPONENT ANALYSIS; SPONTANEOUS BRAIN ACTIVITY; SOURCE
   LOCALIZATION; NEUROMAGNETIC DATA; BLIND SEPARATION; INVERSE PROBLEM;
   RESPONSES; LOCATION; FIELDS; NOISE
AB We propose a new model to approximate spatiotemporal noise covariance for use in neural electromagnetic source analysis, which better captures temporal variability in background activity. As with other existing formalisms, our model employs a Kronecker product of matrices representing temporal and spatial covariance. In our model, spatial components are allowed to have differing temporal covariances. Variability is represented as a series of Kronecker products of spatial component covariances and corresponding temporal covariances. Unlike previous attempts to model covariance through a sum of Kronecker products, our model is designed to have a computationally manageable inverse. Despite increased descriptive power, inversion of the model is fast, making it useful in source analysis. We have explored two versions of the model. One is estimated based on the assumption that spatial components of background noise have uncorrelated time courses. Another version, which gives closer approximation, is based on the assumption that time courses are statistically independent. The accuracy of the structural approximation is compared to an existing model, based on a single Kronecker product, using both Frobenius norm of the difference between spatiotemporal sample covariance and a model, and scatter plots. Performance of ours and previous models is compared in source analysis of a large number of single dipole problems with simulated time courses and with background from authentic magnetoencephalography data.
C1 Los Alamos Natl Lab, Appl Modern Phys Grp, Los Alamos, NM 87545 USA.
RP Plis, SM (reprint author), Los Alamos Natl Lab, Appl Modern Phys Grp, MS-D454, Los Alamos, NM 87545 USA.
EM pliz@lanl.gov
OI Plis, Sergey/0000-0003-0040-0365; JUN, SUNG CHAN/0000-0001-5357-4436
FU NIBIB NIH HHS [2 R01 EB000310-05]
NR 40
TC 6
Z9 6
U1 0
U2 1
PU AMERICAN 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 JAN
PY 2007
VL 75
IS 1
AR 011928
DI 10.1103/PhysRevE.75.011928
PN 1
PG 13
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 131TR
UT WOS:000243893400104
PM 17358205
ER

PT J
AU Rose, KA
   Meier, JA
   Dougherty, GM
   Santiago, JG
AF Rose, Klint A.
   Meier, John A.
   Dougherty, George M.
   Santiago, Juan G.
TI Rotational electrophoresis of striped metallic microrods
SO PHYSICAL REVIEW E
LA English
DT Article
ID INDUCED-CHARGE ELCTROOSMOSIS; UNIVALENT SALT-SOLUTIONS; DOUBLE-LAYER;
   BIOLOGICAL APPLICATIONS; COLLOIDAL PARTICLES; DISPERSE SYSTEMS;
   BUILDING-BLOCKS; EXTERNAL FIELDS; ELECTRIC-FIELDS; BROWNIAN-MOTION
AB Analytical models are developed for the translation and rotation of metallic rods in a uniform electric field. The limits of thin and thick electric double layers are considered. These models include the effect of stripes of different metals along the length of the particle. Modeling results are compared to experimental measurements for metallic rods. Experiments demonstrate the increased alignment of particles with increasing field strength and the increase in degree of alignment of thin versus thick electric double layers. The metal rods polarize in the applied field and align parallel to its direction due to torques on the polarized charge. The torque due to polarization has a second-order dependence on the electric field strength. The particles are also shown to have an additional alignment torque component due to nonuniform densities along their length. The orientation distributions of dilute suspensions of particles are also shown to agree well with results predicted by a rotational convective-diffusion equation.
C1 Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA.
   Lawrence Livermore Natl Lab, Ctr Micro & Nanotechnol, Livermore, CA 94550 USA.
RP Rose, KA (reprint author), Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA.
NR 68
TC 48
Z9 48
U1 1
U2 7
PU AMERICAN 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 JAN
PY 2007
VL 75
IS 1
AR 011503
DI 10.1103/PhysRevE.75.011503
PN 1
PG 15
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 131TR
UT WOS:000243893400055
PM 17358156
ER

PT J
AU Chao, AW
   Courant, ED
AF Chao, Alexander W.
   Courant, Ernest D.
TI Spin echo in synchrotrons
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB As a polarized beam is accelerated through a depolarization resonance, its polarization is reduced by a well-defined calculable reduction factor. When the beam subsequently crosses a second resonance, the final beam polarization is considered to be reduced by the product of the two reduction factors corresponding to the two crossings, each calculated independently of the other. This is a good approximation when the spread of spin precession frequency Delta nu(spin) of the beam ( particularly due to its energy spread) is sufficiently large that the spin precession phases of individual particles smear out completely during the time tau between the two crossings. This approximate picture, however, ignores two spin dynamics effects: an interference-overlap effect and a spin echo effect. This paper is to address these two effects. The interference-overlap effect occurs when Delta nu(spin) is too small, or when tau is too short, to complete the smearing process. In this case, the two resonance crossings overlap each other, and the final polarization exhibits constructive or destructive interference patterns depending on the exact value of tau. Typically, the beam's energy spread is large and this interference-overlap effect does not occur. To study this effect, therefore, it is necessary to reduce the beam energy spread and to consider two resonance crossings very close to each other. The other mechanism, also due to the interplay between two resonance crossings, is spin echo. It turns out that even when the precession phases appear to be completely smeared between the two crossings, there will still be a sudden and short-lived echo signal of beam polarization at a time tau after the second crossing; the magnitude of which can be as large as 57%. This echo signal exists even when the beam has a sizable energy spread and when tau is very large, and could be a sensitive ( albeit challenging) way to experimentally test the intricate spin dynamics in a synchrotron. After giving an analysis of the interference-overlap and the echo effects, two possible experiments to explore them are suggested.
C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
   Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Chao, AW (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
NR 27
TC 1
Z9 1
U1 1
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD JAN
PY 2007
VL 10
IS 1
AR 014001
DI 10.1103/PhysRevSTAB.10.014001
PG 11
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 142QV
UT WOS:000244665700008
ER

PT J
AU Chung, M
   Gilson, EP
   Dorf, M
   Davidson, RC
   Efthimion, PC
   Majeski, R
AF Chung, Moses
   Gilson, Erik P.
   Dorf, Mikhail
   Davidson, Ronald C.
   Efthimion, Philip C.
   Majeski, Richard
TI Ion injection optimization for a linear Paul trap to study intense beam
   propagation
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID SIMULATION
AB The Paul Trap Simulator Experiment (PTSX) is a linear Paul trap whose purpose is to simulate the nonlinear transverse dynamics of intense charged particle beam propagation in periodic-focusing quadrupole magnetic transport systems. Externally created cesium ions are injected and trapped in the long central electrodes of the PTSX device. In order to have well-matched one-component plasma equilibria for various beam physics experiments, it is important to optimize the ion injection. From the experimental studies reported in this paper, it is found that the injection process can be optimized by minimizing the beam mismatch between the source and the focusing lattice, and by minimizing the number of particles present in the vicinity of the injection electrodes when the injection electrodes are switched from the fully oscillating voltage waveform to their static trapping voltage.
C1 Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Chung, M (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
NR 19
TC 8
Z9 8
U1 0
U2 3
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 JAN
PY 2007
VL 10
IS 1
AR 014202
DI 10.1103/PhysRevSTAB.10.014202
PG 7
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 142QV
UT WOS:000244665700011
ER

PT J
AU Hartemann, FV
   Gibson, DJ
   Brown, WJ
   Rousse, A
   Phuoc, KT
   Mallka, V
   Faure, J
   Pukhov, A
AF Hartemann, F. V.
   Gibson, D. J.
   Brown, W. J.
   Rousse, A.
   Phuoc, K. Ta
   Mallka, V.
   Faure, J.
   Pukhov, A.
TI Compton scattering x-ray sources driven by laser wakefield acceleration
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID WAKE-FIELD ACCELERATION; MEV ELECTRON-BEAM; THOMSON SCATTERING; BUBBLE
   REGIME; GENERATION; DIFFRACTION; INJECTION; PLASMAS; CHANNEL; PULSES
AB Recent laser wakefield acceleration experiments have demonstrated the generation of femtosecond, nano-Coulomb, low emittance, nearly monokinetic relativistic electron bunches of sufficient quality to produce bright, tunable, ultrafast x-rays via Compton scattering. Design parameters for a proof-of-concept experiment are presented using a three-dimensional Compton scattering code and a laser-plasma interaction particle-in-cell code modeling the wakefield acceleration process; x-ray fluxes exceeding 10(21) s(-1) are predicted, with a peak brightness >10(19) photons/(mm(2) mrad(2) s 0.1% bandwidth)).
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   Ecole Natl Super Tech Avancees, Lab Opt Appliquee, F-91761 Palaiseau, France.
   Univ Dusseldorf, Inst Theoret Phys 1, D-40225 Dusseldorf, Germany.
RP Hartemann, FV (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RI ROUSSE, Antoine/D-2712-2009; pukhov, alexander/C-8082-2016
NR 37
TC 40
Z9 40
U1 1
U2 9
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 JAN
PY 2007
VL 10
IS 1
AR 011301
DI 10.1103/PhysRevSTAB.10.011301
PG 8
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 142QV
UT WOS:000244665700002
ER

PT J
AU Heifets, S
   Novokhatski, S
   Teytelman, D
AF Heifets, S.
   Novokhatski, S.
   Teytelman, D.
TI Optical effects of wakefields in the PEP-II Stanford Linear Accelerator
   Center B Factory
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB Wakefields defining beam stability affect also the beam optics and beam properties in high current machines. In this paper we present observations and analysis of the optical effects in the PEP-II Stanford Linear Accelerator Center B Factory, which has the record in achievement of high electron and positron currents. We study the synchronous phase and the bunch length variation along the train of bunches, overall bunch lengthening, and effects of the wakes on the tune and on the Twiss parameters. This analysis is being used in upgrades of PEP-II and may be applied to future B factories and damping rings for linear colliders.
C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
RP Heifets, S (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
NR 18
TC 1
Z9 1
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 JAN
PY 2007
VL 10
IS 1
AR 011001
DI 10.1103/PhysRevSTAB.10.011001
PG 9
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 142QV
UT WOS:000244665700001
ER

PT J
AU Heifets, S
   Teytelman, D
AF Heifets, S.
   Teytelman, D.
TI Effect of coupled-bunch modes on the longitudinal feedback system
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB The Pedersen analysis of the low-level rf feedback system assumes that all bunches oscillate in phase which corresponds to the lowest coupled-bunch mode. This analysis is extended here to take into account all other coupled-bunch modes what might be important for the strongly detuned cavities in large storage rings such as PEP-II.
C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
RP Heifets, S (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
NR 6
TC 0
Z9 0
U1 0
U2 1
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 JAN
PY 2007
VL 10
IS 1
AR 012804
DI 10.1103/PhysRevSTAB.10.012804
PG 10
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 142QV
UT WOS:000244665700006
ER

PT J
AU Huang, XB
AF Huang, Xiaobiao
TI Matrix formalism of synchrobetatron coupling
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB In this paper we present a complete linear synchrobetatron coupling formalism by studying the transfer matrix which describes linear horizontal and longitudinal motions. With the technique established in the linear horizontal-vertical coupling study [ D. Sagan and D. Rubin, Phys. Rev. ST Accel. Beams 2, 074001 ( 1999)], we found a transformation to block diagonalize the transfer matrix and decouple the betatron motion and the synchrotron motion. By separating the usual dispersion term from the horizontal coordinate first, we were able to obtain analytic expressions of the transformation under reasonable approximations. We also obtained the perturbations to the betatron tune and the Courant-Snyder functions. The closed-orbit changes due to finite energy gains at rf cavities and radiation energy losses were studied by the 5 x 5 extended transfer matrix with the fifth column describing kicks in the 4-dimension phase space.
C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
RP Huang, XB (reprint author), Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
EM xiahuang@slac.stanford.edu
NR 14
TC 6
Z9 6
U1 1
U2 1
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 JAN
PY 2007
VL 10
IS 1
AR 014002
DI 10.1103/PhysRevSTAB.10.014002
PG 12
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 142QV
UT WOS:000244665700009
ER

PT J
AU Sereno, NS
   Lenkszus, FR
AF Sereno, N. S.
   Lenkszus, F. R.
TI Feedback correction of injection errors using digital signal-processing
   techniques
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB Efficient transfer of electron beams from one accelerator to another is important for 3rd-generation light sources that operate using top-up. In top-up mode, a constant amount of charge is injected at regular intervals into the storage ring to replenish beam lost primarily due to Touschek scattering. Top-up therefore requires that the complex of injector accelerators that fill the storage ring transport beam with a minimum amount of loss. Injection can be a source of significant beam loss if not carefully controlled. In this note we describe a method of processing injection transient signals produced by beam-position monitors and using the processed data in feedback. Feedback control using the technique described here has been incorporated in the Advanced Photon Source (APS) booster synchrotron to correct injection transients.
C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Sereno, NS (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM sereno@aps.anl.gov; frl@aps.anl.gov
NR 10
TC 0
Z9 0
U1 0
U2 1
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 JAN
PY 2007
VL 10
IS 1
AR 012803
DI 10.1103/PhysRevSTAB.10.012803
PG 8
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 142QV
UT WOS:000244665700005
ER

PT J
AU Xu, J
   Mustapha, B
   Aseev, VN
   Ostroumov, PN
AF Xu, J.
   Mustapha, B.
   Aseev, V. N.
   Ostroumov, P. N.
TI Parallelization of a beam dynamics code and first large scale radio
   frequency quadrupole simulations
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB The design and operation support of hadron ( proton and heavy-ion) linear accelerators require substantial use of beam dynamics simulation tools. The beam dynamics code TRACK has been originally developed at Argonne National Laboratory (ANL) to fulfill the special requirements of the rare isotope accelerator (RIA) accelerator systems. From the beginning, the code has been developed to make it useful in the three stages of a linear accelerator project, namely, the design, commissioning, and operation of the machine. To realize this concept, the code has unique features such as end-to-end simulations from the ion source to the final beam destination and automatic procedures for tuning of a multiple charge state heavy-ion beam. The TRACK code has become a general beam dynamics code for hadron linacs and has found wide applications worldwide. Until recently, the code has remained serial except for a simple parallelization used for the simulation of multiple seeds to study the machine errors. To speed up computation, the TRACK Poisson solver has been parallelized. This paper discusses different parallel models for solving the Poisson equation with the primary goal to extend the scalability of the code onto 1024 and more processors of the new generation of supercomputers known as BlueGene (BG/L). Domain decomposition techniques have been adapted and incorporated into the parallel version of the TRACK code. To demonstrate the new capabilities of the parallelized TRACK code, the dynamics of a 45 mA proton beam represented by 10(8) particles has been simulated through the 325 MHz radio frequency quadrupole and initial accelerator section of the proposed FNAL proton driver. The results show the benefits and advantages of large-scale parallel computing in beam dynamics simulations.
C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Xu, J (reprint author), Argonne Natl Lab, Div Phys, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Xu, Jin/C-7751-2014
OI Xu, Jin/0000-0002-1147-7408
NR 22
TC 4
Z9 4
U1 0
U2 1
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 JAN
PY 2007
VL 10
IS 1
AR 014201
DI 10.1103/PhysRevSTAB.10.014201
PG 12
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 142QV
UT WOS:000244665700010
ER

PT S
AU Rosmej, FB
   Lee, RW
   Riley, D
   Meyer-Ter-Vehn, J
   Krenz, A
   Tschentscher, T
   Tauschwitz, A
   Tauschwitz, A
   Lisitsa, VS
   Faenov, AY
AF Rosmej, F. B.
   Lee, R. W.
   Riley, D.
   Meyer-Ter-Vehn, J.
   Krenz, A.
   Tschentscher, T.
   Tauschwitz, An.
   Tauschwitz, A.
   Lisitsa, V. S.
   Faenov, A. Ya.
BE Hutton, R
   Zou, YM
TI Warm dense matter and strongly coupled Plasmas created by intense heavy
   ion beams and XUV-Free electron laser: An overview of spectroscopic
   methods
SO PHYSICS AT ELECTRON BEAM ION TRAPS AND ADVANCED RESEARCH LIGHT SOURCES
   2005
SE Journal of Physics Conference Series
LA English
DT Proceedings Paper
CT International Workshop on Physics at Electron Beam Ion Traps and
   Advanced Research Light Sources
CY MAR 09-13, 2005
CL Hainan, PEOPLES R CHINA
DE spectroscopy; diagnostics; highly charged ions; dielectronic satellites;
   x-ray scattering; non-equilibrium plasmas; laser produced plasmas; Warm
   Dense Matter; strongly coupled plasmas; heavy ion beams; free-electron
   laser
ID RADIATION; DIAGNOSTICS; EMISSION; MODEL
AB High density plasma physics, radiation emission/scattering and related atomic physics, spectroscopy and diagnostics are going to make large steps forward due to new experimental facilities providing beams of intense heavy ions and X/XUV free electron laser radiation. These facilities are currently being established at GSI-Darmstadt and DESY-Hamburg in Germany to access new and complementary parameter regimes for basic research which have never been obtained in laboratories so far: homogenous benchmark samples near solid density and temperatures from eV up to keV. This will provide important impact to many disciplines like astrophysics, atomic physics in dense environments, dense and strongly coupled plasma effects, radiation emission, equation of state. The spectroscopic analysis of the radiation emission plays a key role in this research to investigate the dynamics of electric fields in multi-particle coupled Coulomb systems and the modification of plasma statistics.
C1 [Rosmej, F. B.] Univ Aix Marseille 1, Case 232, F-13397 Marseille 20, France.
   [Lee, R. W.] Lawrence Livermore Natl Lab, Livermore, CA USA.
   [Riley, D.] Queens Univ Belfast, Belfast BT7 1NN, Antrim, North Ireland.
   [Meyer-Ter-Vehn, J.; Krenz, A.] Max Planck Inst Quantum Opt, D-85748 Garching, Germany.
   [Tschentscher, T.] DESY, HASYLAB, D-22607 Hamburg, Germany.
   [Tauschwitz, An.] Goethe Univ Frankfurt, Inst Theoret Phys, Frankfurt, Germany.
   [Tauschwitz, A.] Gesellschaft Schwerionenforschung GSI, D-64291 Darmstadt, Germany.
   [Lisitsa, V. S.] Russian Res Ctr Kurchatov, Moscow 123182, Russia.
   [Faenov, A. Ya.] VNIIFTRI, Multi Charged Ion Spectra Data Ctr, Mendeleyevsk 141570, Russia.
RP Rosmej, FB (reprint author), Univ Aix Marseille 1, Case 232, F-13397 Marseille 20, France.
EM frank.rosmej@piim.up.univ-mrs.fr
NR 25
TC 0
Z9 0
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 1742-6588
J9 J PHYS CONF SER
PY 2007
VL 72
DI 10.1088/1742-6596/72/l/012007
PG 11
WC Physics, Applied; Physics, Fluids & Plasmas; Physics, Atomic, Molecular
   & Chemical; Physics, Nuclear
SC Physics
GA BGW10
UT WOS:000250867700007
ER

PT J
AU Kastengren, AL
   Dutton, JC
   Elliott, GS
AF Kastengren, Alan L.
   Dutton, J. Craig
   Elliott, Gregory S.
TI Large-scale structure visualization and convection velocity in
   supersonic blunt-base cylinder wakes
SO PHYSICS OF FLUIDS
LA English
DT Article
ID TURBULENT MIXING LAYERS; COMPRESSIBLE SHEAR LAYERS; BOUNDARY-LAYERS;
   FLOW STRUCTURE; EVOLUTION; EXPANSION; UNSTEADINESS; ENTRAINMENT; GROWTH;
   CAVITY
AB Time-correlated imaging has been used to study supersonic blunt-base cylinder wakes at 0 degrees and 10 degrees angle-of-attack to an M=2.46 flow. Most of the temporal evolution of the large-scale structures consists of swelling, shrinking, or rollover, with interactions between structures seeming to play a small role. While structures occasionally merge, rotational pairing events are not observed in the visualizations. The position of the recompression shock in the windward part of the angle-of-attack wake appears to fluctuate on rapid time scales, with disturbances in the shock position tending to follow the convection of large-scale structures in the adjoining shear layer. A consistent difference in the structure convection velocity seems to exist between the high-speed and low-speed sides of the shear layers in this study. The stream selection rule is followed for both the axisymmetric and angle-of-attack wakes before reattachment, but the recompression and reattachment processes greatly influence the structure convection velocity in the axisymmetric wake. Convection velocity measurements in the end-view visualizations show that the large-scale structures have a significant circumferential velocity component in the angle-of-attack wake during and after reattachment, while the large-scale structures in the axisymmetric wake do not, as expected. (c) 2007 American Institute of Physics.
C1 Argonne Natl Lab, Energy Syst Div, Argonne, IL 60439 USA.
   Univ Texas, Mech & Aerosp Engn Dept, Arlington, TX 76019 USA.
   Univ Illinois, Dept Aerosp Engn, Chicago, IL 61801 USA.
RP Kastengren, AL (reprint author), Argonne Natl Lab, Energy Syst Div, Argonne, IL 60439 USA.
NR 48
TC 7
Z9 7
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 1070-6631
J9 PHYS FLUIDS
JI Phys. Fluids
PD JAN
PY 2007
VL 19
IS 1
AR 015103
DI 10.1063/1.2432157
PG 15
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 132FH
UT WOS:000243927500023
ER

PT S
AU Zhang, Y
   Mascarenhas, A
AF Zhang, Y.
   Mascarenhas, A.
BE Krowne, CM
   Zhang, Y
TI Negative Refraction of Electromagnetic and Electronic Waves in Uniform
   Media
SO PHYSICS OF NEGATIVE REFRACTION AND NEGATIVE INDEX MATERIALS: OPTICAL AND
   ELECTRONIC ASPECTS AND DIVERSIFIED APPROACHES
SE Springer Series in Materials Science
LA English
DT Article; Book Chapter
ID MOTOHIRO-TAGA INTERFACE; PHOTONIC CRYSTALS; ORIENTATIONAL SUPERLATTICES;
   SPATIAL-DISPERSION; GROUP-VELOCITY; LIGHT; INDEX; LENS; METAMATERIALS;
   PERMITTIVITY
AB We discuss various schemes that have been used to realize negative refraction and zero reflection, and the underlying physics that dictates each scheme. The requirements for achieving both negative refraction and zero reflection are explicitly given for different arrangements of the material interface and different structures of the electric permittivity tenser e. We point out that having a left-handed medium is neither necessary nor sufficient for achieving negative refraction. The fundamental limitations are discussed for using these schemes to construct a perfect lens or "superlens," which is the primary context of the current interest in this field. The ability of an ideal "superlens" beyond diffraction-limit "focusing" is contrasted with that of a conventional lens or an immersion lens.
C1 [Zhang, Y.; Mascarenhas, A.] Natl Renewable Energy Lab, Ctr Mat Sci, Golden, CO 80401 USA.
RP Zhang, Y (reprint author), Natl Renewable Energy Lab, Ctr Mat Sci, 1617 Cole Blvd, Golden, CO 80401 USA.
EM Yong_Zhang@nrel.gov
NR 71
TC 44
Z9 46
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0933-033X
BN 978-3-540-72131-4
J9 SPRINGER SER MATER S
PY 2007
VL 98
BP 1
EP 18
DI 10.3115/1626281.1626282
D2 10.1007/978-3-540-72132-1
PG 18
WC Materials Science, Multidisciplinary; Optics; Physics, Applied
SC Materials Science; Optics; Physics
GA BJM17
UT WOS:000266790600001
ER

PT J
AU Davidson, RC
AF Davidson, Ronald C.
TI Announcement: The 2006 James Clerk Maxwell Prize for Plasma Physics
SO PHYSICS OF PLASMAS
LA English
DT Biographical-Item
C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Davidson, RC (reprint author), Princeton Plasma Phys Lab, James Forrestal Campus,POB 451, Princeton, NJ 08543 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD JAN
PY 2007
VL 14
IS 1
AR 010201
DI 10.1063/1.2709725
PG 1
WC Physics, Fluids & Plasmas
SC Physics
GA 131TC
UT WOS:000243891800001
ER

PT J
AU Hollmann, EM
   Jernigan, TC
   Strait, EJ
   Antar, G
   Evans, TE
   Gray, DS
   Groth, M
   Humphreys, DA
   Parks, PB
   Whyte, DG
AF Hollmann, E. M.
   Jernigan, T. C.
   Strait, E. J.
   Antar, G.
   Evans, T. E.
   Gray, D. S.
   Groth, M.
   Humphreys, D. A.
   Parks, P. B.
   Whyte, D. G.
TI Observation of q-profile dependence in noble gas injection radiative
   shutdown times in DIII-D
SO PHYSICS OF PLASMAS
LA English
DT Article
ID FAST PLASMA SHUTDOWN; DISRUPTION MITIGATION; TOKAMAK; JET; IMPURITY;
   TEMPERATURE; DYNAMICS
AB Massive injection of argon was used to terminate DIII-D discharges with different radial profiles of the safety factor q. An increasing delay before the onset of the central temperature collapse was observed as the overall (core and edge) q of the target plasma was increased. Additionally, an increase in the length of the current quench time was observed, consistent with reduced magnetohydrodynamic (MHD) mode amplitudes and reduced MHD mixing. These results are supported by measurements of heat and impurity mixing during the thermal collapse which observe that thermal transport and impurity mixing are not smooth functions of time but are accelerated when low-order (n=1) MHD modes are destabilized. These results demonstrate that low-order MHD modes play a central role in gas jet shutdowns and density-limit disruptions in tokamaks. (c) 2007 American Institute of Physics.
C1 Univ Calif San Diego, La Jolla, CA 92093 USA.
   Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   Gen Atom Co, San Diego, CA 92186 USA.
   Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
   Univ Wisconsin, Madison, WI 53706 USA.
RP Hollmann, EM (reprint author), Univ Calif San Diego, La Jolla, CA 92093 USA.
RI Groth, Mathias/G-2227-2013
NR 19
TC 16
Z9 16
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 JAN
PY 2007
VL 14
IS 1
AR 012502
DI 10.1063/1.2408404
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 131TC
UT WOS:000243891800028
ER

PT J
AU Isler, RC
   Brooks, NH
   West, WP
   McLean, AG
AF Isler, R. C.
   Brooks, N. H.
   West, W. P.
   McLean, A. G.
TI Determination of carbon release mechanisms in the DIII-D divertors from
   analysis of CI line profiles
SO PHYSICS OF PLASMAS
LA English
DT Article
ID VELOCITY DISTRIBUTION; TOKAMAK LIMITER; LOW-ENERGY; ATOMS; PLASMA
AB During typical operation of the DIII-D tokamak, physical and chemical sputtering are the most important mechanisms for release of carbon at the divertor targets [J. L. Luxon, Nucl. Fusion 42, 614 (2002)]. Modeling of C I spectral line profiles is discussed as a technique for evaluating the relative contribution of each process and is applied to several types of discharges. The line shapes are symmetric and have shifts of about -0.03 A if they are produced solely from molecular dissociation, but they exhibit distinct asymmetries and shifts approaching -0.20 A if generated by physical sputtering. Modeled profiles must, in general, take account of both mechanisms in order to match experimental data. An alternate approach to distinguishing between the two processes, which relies on the relative intensities of C I, CD, and C-2 emissions, is examined in light of conclusions drawn from the line-shape analysis. (c) 2007 American Institute of Physics.
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   Gen Atom Co, San Diego, CA 92186 USA.
   Univ Toronto, Inst Aerosp Studies, N York, ON M3H 5T6, Canada.
RP Isler, RC (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
OI Isler, Ralph/0000-0002-5368-7200
NR 23
TC 5
Z9 5
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 JAN
PY 2007
VL 14
IS 1
AR 012506
DI 10.1063/1.2431352
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 131TC
UT WOS:000243891800032
ER

PT J
AU Kolesnichenko, YI
   Lutsenko, VV
   Marchenko, VS
   White, RB
AF Kolesnichenko, Ya. I.
   Lutsenko, V. V.
   Marchenko, V. S.
   White, R. B.
TI Stabilization of the quasi-interchange mode in tokamaks by circulating
   energetic ions
SO PHYSICS OF PLASMAS
LA English
DT Article
ID LOW-SHEAR TOKAMAKS; SAWTOOTH OSCILLATIONS; STABILITY; PRESSURE; PLASMA
AB The influence of the circulating energetic ions on the quasi-interchange (QI) mode in tokamak plasmas with a wide shearless core and the central safety factor close to unity is considered. It is found that these ions tend to stabilize the QI mode in the case of co-injection and balanced injection, whereas the influence of counter-circulating ions is typically destabilizing because of finite-orbit-width effects. Specific examples relevant to tokamaks with large and small aspect ratio of the torus are considered. (c) 2007 American Institute of Physics.
C1 Inst Nucl Res, UA-03680 Kiev, Ukraine.
   Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Kolesnichenko, YI (reprint author), Inst Nucl Res, Prospect Nauky 47, UA-03680 Kiev, Ukraine.
RI White, Roscoe/D-1773-2013
OI White, Roscoe/0000-0002-4239-2685
NR 20
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 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD JAN
PY 2007
VL 14
IS 1
AR 012504
DI 10.1063/1.2434791
PG 6
WC Physics, Fluids & Plasmas
SC Physics
GA 131TC
UT WOS:000243891800030
ER

PT J
AU Strozzi, DJ
   Williams, EA
   Langdon, AB
   Bers, A
AF Strozzi, D. J.
   Williams, E. A.
   Langdon, A. B.
   Bers, A.
TI Kinetic enhancement of Raman backscatter, and electron acoustic Thomson
   scatter
SO PHYSICS OF PLASMAS
LA English
DT Article
ID NATIONAL-IGNITION-FACILITY; LASER-PLASMA INTERACTIONS; VLASOV CODE;
   WAVE; DRIVEN; INSTABILITIES; TRANSITION; PHYSICS; REGIME
AB One-dimensional Eulerian Vlasov-Maxwell simulations are presented that show kinetic enhancement of stimulated Raman backscatter (SRBS) due to electron trapping in regimes of heavy linear Landau damping. The conventional Raman Langmuir wave is transformed into a set of beam acoustic modes [L. Yin , Phys. Rev. E 73, 025401 (2006)]. A low phase velocity electron acoustic wave (EAW) is seen developing from the self-consistent Raman physics. Backscatter of the pump laser off the EAW fluctuations is reported and referred to as electron acoustic Thomson scatter. This light is similar in wavelength to, although much lower in amplitude than, the reflected light between the pump and SRBS wavelengths observed in single-hot-spot experiments, and previously interpreted as stimulated electron acoustic scatter [D. S. Montgomery , Phys. Rev. Lett. 87, 155001 (2001)]. The EAW observed in our simulations is strongest well below the phase-matched frequency for electron acoustic scatter, and therefore the EAW is not produced by it. The beating of different beam acoustic modes is proposed as the EAW excitation mechanism, and is called beam acoustic decay. Supporting evidence for this process, including bispectral analysis, is presented. The linear electrostatic modes, found by projecting the numerical distribution function onto a Gauss-Hermite basis, include beam acoustic modes (some of which are unstable even without parametric coupling to light waves) and a strongly damped EAW similar to the observed one. This linear EAW results from non-Maxwellian features in the electron distribution, rather than nonlinearity due to electron trapping. (c) 2007 American Institute of Physics.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   MIT, Cambridge, MA 02139 USA.
RP Strozzi, DJ (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM dstrozzi@llnl.gov
OI Strozzi, David/0000-0001-8814-3791
NR 47
TC 41
Z9 41
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD JAN
PY 2007
VL 14
IS 1
AR 013104
DI 10.1063/1.2431161
PG 13
WC Physics, Fluids & Plasmas
SC Physics
GA 131TC
UT WOS:000243891800046
ER

PT J
AU Sydorenko, D
   Smolyakov, A
   Kaganovich, I
   Raitses, Y
AF Sydorenko, D.
   Smolyakov, A.
   Kaganovich, I.
   Raitses, Y.
TI Effects of non-Maxwellian electron velocity distribution function on
   two-stream instability in low-pressure discharges
SO PHYSICS OF PLASMAS
LA English
DT Article
ID HALL THRUSTER; SECONDARY-EMISSION; NONLINEAR-THEORY; PLASMA; BEAM;
   SIMULATION; TRANSPORT; SHEATH; MODEL
AB Electron emission from discharge chamber walls is important for plasma maintenance in many low-pressure discharges. The electrons emitted from the walls are accelerated by the sheath electric field and are injected into the plasma as an electron beam. Penetration of this beam through the plasma is subject to the two-stream instability, which tends to slow down the beam electrons and heat the plasma electrons. In the present paper, a one-dimensional particle-in-cell code is used to simulate these effects both in a collisionless plasma slab with immobile ions and in a cross-field discharge of a Hall thruster. The two-stream instability occurs if the total electron velocity distribution function of the plasma-beam system is a nonmonotonic function of electron speed. Low-pressure plasmas can be depleted of electrons with energy above the plasma potential. This study reveals that under such conditions the two-stream instability depends crucially on the velocity distribution function of electron emission. It is shown that propagation of the secondary electron beams in Hall thrusters may be free of the two-stream instability if the velocity distribution of secondary electron emission is a monotonically decaying function of speed. In this case, the beams propagate between the walls with minimal loss of the beam current and the secondary electron emission does not affect the thruster plasma properties. (c) 2007 American Institute of Physics.
C1 Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK S7N 5E2, Canada.
   Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Sydorenko, D (reprint author), Univ Alberta, Dept Phys, Edmonton, AB T6G 2G7, Canada.
EM sydorenk@ualberta.ca
NR 34
TC 21
Z9 21
U1 1
U2 5
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 JAN
PY 2007
VL 14
IS 1
AR 013508
DI 10.1063/1.2435315
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 131TC
UT WOS:000243891800056
ER

PT J
AU Tang, W
   Strickler, TS
   Lau, YY
   Gilgenbach, RM
   Zier, J
   Gomez, MR
   Yu, E
   Garasi, C
   Cuneo, ME
   Mehlhorn, TA
AF Tang, Wilkin
   Strickler, T. S.
   Lau, Y. Y.
   Gilgenbach, R. M.
   Zier, Jacob
   Gomez, M. R.
   Yu, Edmund
   Garasi, Chris
   Cuneo, M. E.
   Mehlhorn, T. A.
TI Linear and nonlinear evolution of azimuthal clumping instabilities in a
   Z-pinch wire array
SO PHYSICS OF PLASMAS
LA English
DT Article
ID ENERGY DENSITY PHYSICS; X-RAY POWER; IMPLOSION DYNAMICS; DIFFERENT
   PHASES; DRIVEN HOHLRAUM; PLASMA; NUMBER; CONDUCTIVITY; ACCELERATOR;
   STABILITY
AB This paper presents an analytic theory on the linear and nonlinear evolution of the most unstable azimuthal clumping mode, known as the pi-mode, in a discrete wire array. In the pi-mode, neighboring wires of the array pair-up as a result of the mutual attraction of the wires which carry current in the same direction. The analytic solution displays two regimes, where the collective interactions of all wires dominate, versus where the interaction of the neighboring, single wire dominates. This solution was corroborated by two vastly different numerical codes which were used to simulate arrays with both high wire numbers (up to 600) and low wire number (8). All solutions show that azimuthal clumping of discrete wires occurs before appreciable radial motion of the wires. Thus, absence of azimuthal clumping of wires in comparison with the wires' radial motion may imply substantial lack of wire currents. While the present theory and simulations have ignored the plasma corona and axial variations, it is argued that their effects, and the complete account of the three-dimensional feature of the pi-mode, together with a scaling study of the wire number, may be expediently simulated by using only one single wire in an annular wedge with a reflection condition imposed on the wedge's boundary. (c) 2007 American Institute of Physics.
C1 Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA.
   Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Tang, W (reprint author), Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA.
NR 42
TC 1
Z9 1
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD JAN
PY 2007
VL 14
IS 1
AR 012706
DI 10.1063/1.2434794
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 131TC
UT WOS:000243891800038
ER

PT J
AU Vu, HX
   DuBois, DF
   Bezzerides, B
AF Vu, H. X.
   DuBois, D. F.
   Bezzerides, B.
TI Inflation threshold: A nonlinear trapping-induced threshold for the
   rapid onset of stimulated Raman scattering from a single laser speckle
SO PHYSICS OF PLASMAS
LA English
DT Article
ID COULOMB COLLISION MODEL; HOT-SPOT EXPERIMENTS; PARAMETRIC-INSTABILITIES;
   FREQUENCY-SHIFT; PLASMA-WAVES; BRILLOUIN-SCATTERING; LANGMUIR
   TURBULENCE; REDUCED-DESCRIPTION; DRIVEN; OSCILLATIONS
AB The rapid onset, with increasing laser intensity, of levels of backward stimulated Raman scattering (BSRS) exceeding linear convective predictions, from single laser hot spots was predicted by simulations [Vu , Phys. Plasmas 9, 1745 (2002)], and has been observed [Montgomery , Phys. Plasmas 9, 2311 (2002)] in nonlinear regimes dominated by electron trapping. A theory for this inflation threshold is given here. The threshold is the result of competition between velocity diffusion and trapping, and is exceeded when the convectively amplified SRS Langmuir wave (LW) achieves an amplitude for which the coherent trapping velocity increment of electrons in the LW (the half-width of the trapping separatrix) exceeds the rms diffusion velocity (resulting from background plasma fluctuations), accumulated in one bounce time, for electrons with mean velocities near the phase velocity of the LW. The results of this theory, when the kinetic theory of the one-dimensional (1D) reduced-description particle-in-cell (RPIC) simulation is used, are in good agreement with a series of 1D RPIC simulations. The theory is naturally generalized to three dimensions, and is compatible with macroscopic laser interaction codes such as pF3d [Berger , Phys. Plasmas 5, 4337 (1998)]. Comparison of the LW trapping-induced inflation threshold to the LW threshold for the Langmuir decay instability provides an estimate for the transition between nonlinear saturation regimes. In an independent hot spot model of many hot spots, statistics suggests that the inflation threshold intensity will control the rapid onset of strong BSRS in laser beams smoothed by random phase plates. (c) 2007 American Institute of Physics.
C1 Univ Calif San Diego, La Jolla, CA 92093 USA.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Vu, HX (reprint author), Univ Calif San Diego, La Jolla, CA 92093 USA.
NR 41
TC 30
Z9 30
U1 1
U2 4
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 JAN
PY 2007
VL 14
IS 1
AR 012702
DI 10.1063/1.2426918
PG 32
WC Physics, Fluids & Plasmas
SC Physics
GA 131TC
UT WOS:000243891800034
ER

PT S
AU Dubon, OD
   Robinson, JT
   Cao, Y
   Liddle, JA
AF Dubon, O. D.
   Robinson, J. T.
   Cao, Y.
   Liddle, J. A.
BE Jantsch, W
   Schaffler, F
TI Programming the shape of highly ordered ge islands on Si: from dots to
   rods
SO PHYSICS OF SEMICONDUCTORS, PTS A AND B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 28th International Conference on the Physics of Semiconductors (ICPS-28)
CY JUL 24-28, 2006
CL Vienna, AUSTRIA
SP Austrian Res Ctr, Infineon, Austrian Fed Minist Educ, Sci & Culture, FFG, Austrian Nano Initiat, Vienna Convent Bur, ICPS 27, Marabun Res, Raith, Int Union Pure & Appl Phys, NMA Networking, Austrian Soc Micro & Nanoelect, Austrian Airlines, Inst Phys, Austriamicrosystems, Agilent Technologies, NIST, LOT ORIEL, Panasonic, ONR Off Naval Res, Volkswagen, USAF Off Sci Res, European Off Aerosp Res & Dev, USAF Res Lab, Darpa
DE molecular beam epitaxy; silicon; germaniuni; self-assembled islands
ID SURFACTANTS; GROWTH
AB In the Ge on Si model heteroepitaxial system, we show that metal patterns on the Si surface induce the assembly of deposited Ge atoms into highly ordered islands whose shapes are programmed by a combination of metal species and substrate orientation. The island shapes including truncated pyramids and nanorods are radically different from those grown on metal-free surfaces and arise by a process whereby intermixing between deposited Ge and substrate Si atoms from the onset of island formation facilitate the island shape evolution.
C1 [Dubon, O. D.; Robinson, J. T.; Cao, Y.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
   [Dubon, O. D.; Robinson, J. T.; Cao, Y.; Liddle, J. A.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Dubon, OD (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
RI Robinson, Jeremy/F-2748-2010; Liddle, James/A-4867-2013
OI Liddle, James/0000-0002-2508-7910
FU National Science Foundation [DMR-0349257]; Division of Materials
   Sciences and Engineering; U.S. Department of Energy [DE-AC02-05CH11231]
FX This work was supported by the National Science Foundation under
   contract number DMR-0349257 and in part by the Director,Office of
   Science,Office of Basic Energy Sciences , Division of Materials Sciences
   and Engineering , of the U.S. Department of Energy under Contract No.
   DE-AC02-05CH11231.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0397-0
J9 AIP CONF PROC
PY 2007
VL 893
BP 37
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics,
   Multidisciplinary; Physics, Condensed Matter
SC Engineering; Optics; Physics
GA BGE22
UT WOS:000246281800018
ER

PT S
AU Lillental-Weber, Z
   Li, X
   Kryliouk, O
   Park, HJ
   Mangum, J
   Anderson, T
AF Lillental-Weber, Z.
   Li, X.
   Kryliouk, O.
   Park, H. J.
   Mangum, J.
   Anderson, T.
BE Jantsch, W
   Schaffler, F
TI Transmission electron microscopy study of InN nanorods
SO PHYSICS OF SEMICONDUCTORS, PTS A AND B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 28th International Conference on the Physics of Semiconductors (ICPS-28)
CY JUL 24-28, 2006
CL Vienna, AUSTRIA
SP Austrian Res Ctr, Infineon, Austrian Fed Minist Educ, Sci & Culture, FFG, Austrian Nano Initiat, Vienna Convent Bur, ICPS 27, Marabun Res, Raith, Int Union Pure & Appl Phys, NMA Networking, Austrian Soc Micro & Nanoelect, Austrian Airlines, Inst Phys, Austriamicrosystems, Agilent Technologies, NIST, LOT ORIEL, Panasonic, ONR Off Naval Res, Volkswagen, USAF Off Sci Res, European Off Aerosp Res & Dev, USAF Res Lab, Darpa
DE indium nitride nanorods; structure; faceting; TEM studies
AB InN nanorods were grown on a, c-, and r-plane of sapphire and also on Si (111) and GaN (0001) by noncatalytic, template-free hydride metal-organic vapor phase epitaxy and studied by transmission electron microscopy, electron energy loss (EELS) and photoluminescence (PL) at room temperature. These nanocrystals have different shapes and different faceting depending on the substrate used and their crystallographic orientation. EELS measurements have confirmed the high purity of these crystals. The observed PL peak was in the range of 0.9-0.95 eV. The strongest PL intensity was observed for the nanocrystals with the larger diameters.
C1 [Lillental-Weber, Z.; Li, X.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   [Kryliouk, O.; Park, H. J.; Mangum, J.; Anderson, T.] Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA.
RP Lillental-Weber, Z (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RI Liliental-Weber, Zuzanna/H-8006-2012
FU Office of Science, Office of Basic Energy Sciences, Division of
   Materials Sciences and Engineering, of the U.S. Department of Energy
   [DE-AC02-05CH11231]; NSF [CTS-031178]; NASA Kennedy Space Center [NAG
   10-316]; ONR [N00014-98-1-04]; NSF DMR [0400416]
FX This work is supported by the Director, Office of Science, Office of
   Basic Energy Sciences, Division of Materials Sciences and Engineering,
   of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
   The work at UF is partially supported by NSF (CTS-031178) and NASA
   Kennedy Space Center Grant NAG 10-316, ONR (N00014-98-1-04) and NSF DMR
   0400416.
NR 0
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0397-0
J9 AIP CONF PROC
PY 2007
VL 893
BP 111
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics,
   Multidisciplinary; Physics, Condensed Matter
SC Engineering; Optics; Physics
GA BGE22
UT WOS:000246281800055
ER

PT S
AU Tsetseris, L
   Pantelides, ST
AF Tsetseris, Leonidas
   Pantelides, Sokrates T.
BE Jantsch, W
   Schaffler, F
TI Physical mechanisms responsible for the abruptness of the Si-SiO2
   interface
SO PHYSICS OF SEMICONDUCTORS, PTS A AND B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 28th International Conference on the Physics of Semiconductors (ICPS-28)
CY JUL 24-28, 2006
CL Vienna, AUSTRIA
SP Austrian Res Ctr, Infineon, Austrian Fed Minist Educ, Sci & Culture, FFG, Austrian Nano Initiat, Vienna Convent Bur, ICPS 27, Marabun Res, Raith, Int Union Pure & Appl Phys, NMA Networking, Austrian Soc Micro & Nanoelect, Austrian Airlines, Inst Phys, Austriamicrosystems, Agilent Technologies, NIST, LOT ORIEL, Panasonic, ONR Off Naval Res, Volkswagen, USAF Off Sci Res, European Off Aerosp Res & Dev, USAF Res Lab, Darpa
DE thermal oxidation; interfaces; Si-SiO2; smoothness
ID SILICON; ENERGY; OXIDATION; GROWTH
AB We use first-principles density-functional theory calculations to identify key mechanisms that control the morphology of the Si-SiO2 interface. We assign the migration of O-2 molecules in the near-interface oxide layer as the rate-limiting process in the initial stages of thermal oxidation. Diffusion of O-2 Molecules in the bulk oxide becomes the rate limiting step as oxidation progresses. We also show that additional processes, namely lateral diffusion, smoothing of asperities and interface trapping of errant O species in Si, are activated during thermal oxidation, resulting in the well-known smoothness of Si-SiO2 interfaces.
C1 [Tsetseris, Leonidas] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
   [Pantelides, Sokrates T.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Tsetseris, L (reprint author), Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
FU AFOSR [4-22-422-4232]; McMinn Endowment at Vanderbilt University
FX We thank R. Buczko for providing model interfaces. The work was
   supported by the AFOSR (grant No. 4-22-422-4232), and the McMinn
   Endowment at Vanderbilt University. The calculations were performed at
   ORNL's Center for Computational Sciences.
NR 17
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0397-0
J9 AIP CONF PROC
PY 2007
VL 893
BP 119
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics,
   Multidisciplinary; Physics, Condensed Matter
SC Engineering; Optics; Physics
GA BGE22
UT WOS:000246281800059
ER

PT S
AU Cohen, ML
   Sau, JD
AF Cohen, Marvin L.
   Sau, Jay Deep
BE Jantsch, W
   Schaffler, F
TI Proposal for a high mobility Ge-Sn alloy system
SO PHYSICS OF SEMICONDUCTORS, PTS A AND B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 28th International Conference on the Physics of Semiconductors (ICPS-28)
CY JUL 24-28, 2006
CL Vienna, AUSTRIA
SP Austrian Res Ctr, Infineon, Austrian Fed Minist Educ, Sci & Culture, FFG, Austrian Nano Initiat, Vienna Convent Bur, ICPS 27, Marabun Res, Raith, Int Union Pure & Appl Phys, NMA Networking, Austrian Soc Micro & Nanoelect, Austrian Airlines, Inst Phys, Austriamicrosystems, Agilent Technologies, NIST, LOT ORIEL, Panasonic, ONR Off Naval Res, Volkswagen, USAF Off Sci Res, European Off Aerosp Res & Dev, USAF Res Lab, Darpa
DE gennanium; mobility
ID BAND-STRUCTURE; SEMICONDUCTORS; GERMANIUM
AB In the following we analyze the effect of alloying Sn and straining through epitaxial growth on the transport properties of Ge and propose a combination of growing a Ge-Sn alloy on another Ge-Sn alloy to obtain a high carrier mobility semiconductor.
C1 [Cohen, Marvin L.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA.
RP Cohen, ML (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0397-0
J9 AIP CONF PROC
PY 2007
VL 893
BP 189
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics,
   Multidisciplinary; Physics, Condensed Matter
SC Engineering; Optics; Physics
GA BGE22
UT WOS:000246281800093
ER

PT S
AU Sharp, ID
   Xu, Q
   Yuan, CW
   Yi, DO
   Liao, CY
   Glaeser, AM
   Minor, AM
   Beeman, JW
   Ridgway, MC
   Kluth, P
   Ager, JW
   Chrzan, DC
   Haller, EE
AF Sharp, I. D.
   Xu, Q.
   Yuan, C. W.
   Yi, D. O.
   Liao, C. Y.
   Glaeser, A. M.
   Minor, A. M.
   Beeman, J. W.
   Ridgway, M. C.
   Kluth, P.
   Ager, J. W., III
   Chrzan, D. C.
   Haller, E. E.
BE Jantsch, W
   Schaffler, F
TI Melting kinetics of confined systems at the nanoscale: Superheating and
   supercooling
SO PHYSICS OF SEMICONDUCTORS, PTS A AND B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 28th International Conference on the Physics of Semiconductors (ICPS-28)
CY JUL 24-28, 2006
CL Vienna, AUSTRIA
SP Austrian Res Ctr, Infineon, Austrian Fed Minist Educ, Sci & Culture, FFG, Austrian Nano Initiat, Vienna Convent Bur, ICPS 27, Marabun Res, Raith, Int Union Pure & Appl Phys, NMA Networking, Austrian Soc Micro & Nanoelect, Austrian Airlines, Inst Phys, Austriamicrosystems, Agilent Technologies, NIST, LOT ORIEL, Panasonic, ONR Off Naval Res, Volkswagen, USAF Off Sci Res, European Off Aerosp Res & Dev, USAF Res Lab, Darpa
DE nanocrystals; melting; interface energy; superheating; supercooling
ID TEMPERATURE
AB In situ electron diffraction measurements of silica-embedded Ge nanocrystals reveal a melting/solidification hysteresis of 470 K which is approximately symmetric about the bulk melting point. This surprising behavior, which is thought to be impossible in bulk systems, is well described by a simple, classical thermodynamic model. Surface pre-melting, which occurs for materials with free surfaces, is suppressed by the presence of the host matrix, thereby allowing both kinetic supercooling and kinetic superheating of the embedded nanocrystals.
C1 Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Sharp, ID (reprint author), Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RI Kluth, Patrick/A-1497-2008; Ridgway, Mark/D-9626-2011; Sharp,
   Ian/I-6163-2015; 
OI Kluth, Patrick/0000-0002-1806-2432; Ridgway, Mark/0000-0002-0642-0108;
   Sharp, Ian/0000-0001-5238-7487; Ager, Joel/0000-0001-9334-9751
NR 5
TC 0
Z9 0
U1 0
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0397-0
J9 AIP CONF PROC
PY 2007
VL 893
BP 191
EP 192
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics,
   Multidisciplinary; Physics, Condensed Matter
SC Engineering; Optics; Physics
GA BGE22
UT WOS:000246281800094
ER

PT S
AU Jones, RE
   van Genuchten, HCM
   Yu, KM
   Walukiewicz, W
   Li, SX
   Ager, JW
   Lillental-Weber, Z
   Haller, EE
   Lu, H
   Schaff, WJ
AF Jones, R. E.
   van Genuchten, H. C. M.
   Yu, K. M.
   Walukiewicz, W.
   Li, S. X.
   Ager, J. W., III
   Lillental-Weber, Z.
   Haller, E. E.
   Lu, H.
   Schaff, W. J.
BE Jantsch, W
   Schaffler, F
TI Defect doping of InN
SO PHYSICS OF SEMICONDUCTORS, PTS A AND B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 28th International Conference on the Physics of Semiconductors (ICPS-28)
CY JUL 24-28, 2006
CL Vienna, AUSTRIA
SP Austrian Res Ctr, Infineon, Austrian Fed Minist Educ, Sci & Culture, FFG, Austrian Nano Initiat, Vienna Convent Bur, ICPS 27, Marabun Res, Raith, Int Union Pure & Appl Phys, NMA Networking, Austrian Soc Micro & Nanoelect, Austrian Airlines, Inst Phys, Austriamicrosystems, Agilent Technologies, NIST, LOT ORIEL, Panasonic, ONR Off Naval Res, Volkswagen, USAF Off Sci Res, European Off Aerosp Res & Dev, USAF Res Lab, Darpa
DE indium nitride; doping; radiation damage; electrical properties; native
   defects
AB InN films grown by molecular beam epitaxy have been subjected to 2 MeV He+ irradiation followed by thermal annealing. Theoretical analysis of the electron mobilities shows that thermal annealing removes triply charged donor defects, creating films with electron mobilities approaching those predicted for uncompensated, singly charged donors. Optimum thermal annealing of irradiated InN can be used to produce samples with electron mobilities higher than those of as grown films.
C1 [Jones, R. E.; van Genuchten, H. C. M.; Yu, K. M.; Walukiewicz, W.; Li, S. X.; Ager, J. W., III; Lillental-Weber, Z.; Haller, E. E.] Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   [Jones, R. E.; Li, S. X.; Haller, E. E.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
   [Lu, H.; Schaff, W. J.] Cornell Univ, Dept Comp Sci & Elect Engn, Ithaca, NY 14853 USA.
RP Jones, RE (reprint author), Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RI Liliental-Weber, Zuzanna/H-8006-2012; Yu, Kin Man/J-1399-2012; 
OI Yu, Kin Man/0000-0003-1350-9642; Ager, Joel/0000-0001-9334-9751
FU Office of Science; Office of Basic Energy Sciences; Division of
   Materials Sciences and Engineering, of U.S; Department of Energy
   [DE-AC02-05CH11231]; ONR [N000149910936]; U.S. Department of Defense
FX This work is supported by the Director, Office of Science, Office of
   Basic Energy Sciences, Division of Materials Sciences and Engineering,
   of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
   The work at Cornell University is supported by ONR under Contract No.
   N000149910936. One of the authors (REJ) thanks the U.S. Department of
   Defense for support in the form of a graduate student fellowship.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0397-0
J9 AIP CONF PROC
PY 2007
VL 893
BP 213
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics,
   Multidisciplinary; Physics, Condensed Matter
SC Engineering; Optics; Physics
GA BGE22
UT WOS:000246281800104
ER

PT S
AU Steger, M
   Yang, A
   Karaiskaj, D
   Thewalt, MLW
   Haller, EE
   Ager, JW
   Cardona, M
   Riemann, H
   Abrosimov, NV
   Gusev, AV
   Bulanov, AD
   Kaliteevskii, AK
   Godisov, ON
   Becker, P
   Pohl, HJ
   Itoh, KM
AF Steger, M.
   Yang, A.
   Karaiskaj, D.
   Thewalt, M. L. W.
   Haller, E. E.
   Ager, J. W., III
   Cardona, M.
   Riemann, H.
   Abrosimov, N. V.
   Gusev, A. V.
   Bulanov, A. D.
   Kaliteevskii, A. K.
   Godisov, O. N.
   Becker, P.
   Pohl, H. -J.
   Itoh, K. M.
BE Jantsch, W
   Schaffler, F
TI Shallow impurity absorption spectroscopy in isotopically enriched
   silicon
SO PHYSICS OF SEMICONDUCTORS, PTS A AND B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 28th International Conference on the Physics of Semiconductors (ICPS-28)
CY JUL 24-28, 2006
CL Vienna, AUSTRIA
SP Austrian Res Ctr, Infineon, Austrian Fed Minist Educ, Sci & Culture, FFG, Austrian Nano Initiat, Vienna Convent Bur, ICPS 27, Marabun Res, Raith, Int Union Pure & Appl Phys, NMA Networking, Austrian Soc Micro & Nanoelect, Austrian Airlines, Inst Phys, Austriamicrosystems, Agilent Technologies, NIST, LOT ORIEL, Panasonic, ONR Off Naval Res, Volkswagen, USAF Off Sci Res, European Off Aerosp Res & Dev, USAF Res Lab, Darpa
DE infrared absorption; isotopically enriched silicon; shallow impurities
ID SPECTRAL LINES; LINEWIDTHS; STATES
AB Karaiskaj et al. showed that the isotopic randomness present in natural Si (Si-nat) causes inhomogeneous broadening of many of the ground state to excited state infrared absorption transitions of the shallow donor phosphorous and acceptor boron. This was surprising since it was thought that the observed linewidths of shallow impurities in silicon are at their fundamental lifetime limit. We report improved high-resolution infrared absorption studies of these impurities in isotopically enriched Si-28, Si-29 and Si-30. The new data improves oil the linewidths of earlier spectra due to reduced concentration broadening. Some of the transitions in Si-28 show the narrowest FWHM ever reported for shallow donor and acceptor absorption transitions.
C1 [Steger, M.; Yang, A.; Karaiskaj, D.; Thewalt, M. L. W.] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada.
   [Haller, E. E.; Ager, J. W., III] Univ Calif Berkeley, LBNL, Berkeley, CA USA.
   [Cardona, M.] Max Planck Inst Festkorperforsch, Stuttgart, Germany.
   [Riemann, H.; Abrosimov, N. V.] lnst Kristallzucht, Berlin, Germany.
   [Gusev, A. V.; Bulanov, A. D.] Inst Chem High Pure Substance RAS, Novocherkassk, Russia.
   [Kaliteevskii, A. K.; Godisov, O. N.] Sci Techn Ctr Centrotech ECP, St Petersburg, Russia.
   [Becker, P.] Phys Techn Bundesanstalt, Bundesanstalt, Germany.
   [Pohl, H. -J.] VITCON Projectconsult GmbH, Jena, Germany.
   [Itoh, K. M.] Keio Univ, Dept Appl Phys, Keio, Japan.
RP Steger, M (reprint author), Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada.
RI Itoh, Kohei/C-5738-2014; 
OI Ager, Joel/0000-0001-9334-9751
FU NSERC
FX We acknowledge NSERC for financial support.
NR 12
TC 3
Z9 3
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0397-0
J9 AIP CONF PROC
PY 2007
VL 893
BP 231
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics,
   Multidisciplinary; Physics, Condensed Matter
SC Engineering; Optics; Physics
GA BGE22
UT WOS:000246281800113
ER

PT S
AU Stehr, D
   Helm, M
   Metzner, C
   Wanke, MC
AF Stehr, D.
   Helm, M.
   Metzner, C.
   Wanke, M. C.
BE Jantsch, W
   Schaffler, F
TI Theory of impurity states in coupled quantum wells and superlattices and
   their infrared absorption spectra
SO PHYSICS OF SEMICONDUCTORS, PTS A AND B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 28th International Conference on the Physics of Semiconductors (ICPS-28)
CY JUL 24-28, 2006
CL Vienna, AUSTRIA
SP Austrian Res Ctr, Infineon, Austrian Fed Minist Educ, Sci & Culture, FFG, Austrian Nano Initiat, Vienna Convent Bur, ICPS 27, Marabun Res, Raith, Int Union Pure & Appl Phys, NMA Networking, Austrian Soc Micro & Nanoelect, Austrian Airlines, Inst Phys, Austriamicrosystems, Agilent Technologies, NIST, LOT ORIEL, Panasonic, ONR Off Naval Res, Volkswagen, USAF Off Sci Res, European Off Aerosp Res & Dev, USAF Res Lab, Darpa
DE intersubband; impurities; quantum well; superlattice
ID TRANSITIONS; ENERGY
AB We present a theory of impurity states in quantum wells, where the confining potential of the heterostructure and the random impurity potential are treated in a unified theory. After diagonalization of the 3D Hamiltonian we calculate the infrared absorption spectrum. We discuss the nature of impurity states that are confined in the quantum wells and their influence on the absorption spectra. We then calculate the absorption spectra for a quadruple quantum well, revealing impurity transitions as well as intersubband transitions. The results are compared to existing experimental data and show a remarkable agreement.
C1 [Stehr, D.; Helm, M.] Forschungszentrum Rossendorf EV, Inst Ion Beam Phys & Mat Res, POB 510119, D-01314 Dresden, Germany.
   [Metzner, C.] Univ Erlangen Nurnberg, Ctr Med Phys & Technol, Biophys Grp, D-91052 Erlangen, Germany.
   [Wanke, M. C.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Stehr, D (reprint author), Forschungszentrum Rossendorf EV, Inst Ion Beam Phys & Mat Res, POB 510119, D-01314 Dresden, Germany.
RI Helm, Manfred/B-2284-2009
FU United States Department of Energy's National Nuclear Security
   Administration [DEAC04-94AL85000]
FX Sandia is a multiprogram laboratory operated by Sandia Corporation, a
   Lockheed Martin Company, for the United States Department of Energy's
   National Nuclear Security Administration under contract DEAC04-
   94AL85000.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0397-0
J9 AIP CONF PROC
PY 2007
VL 893
BP 243
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics,
   Multidisciplinary; Physics, Condensed Matter
SC Engineering; Optics; Physics
GA BGE22
UT WOS:000246281800119
ER

PT S
AU Ager, JW
   Yu, KM
   Jones, RE
   Yamaguchi, DM
   Li, SX
   Walukiewicz, W
   Haller, EE
   Lu, H
   Schaff, WJ
AF Ager, J. W., III
   Yu, K. M.
   Jones, R. E.
   Yamaguchi, D. M.
   Li, S. X.
   Walukiewicz, W.
   Haller, E. E.
   Lu, H.
   Schaff, W. J.
BE Jantsch, W
   Schaffler, F
TI Evidence for p-type InN
SO PHYSICS OF SEMICONDUCTORS, PTS A AND B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 28th International Conference on the Physics of Semiconductors (ICPS-28)
CY JUL 24-28, 2006
CL Vienna, AUSTRIA
SP Austrian Res Ctr, Infineon, Austrian Fed Minist Educ, Sci & Culture, FFG, Austrian Nano Initiat, Vienna Convent Bur, ICPS 27, Marabun Res, Raith, Int Union Pure & Appl Phys, NMA Networking, Austrian Soc Micro & Nanoelect, Austrian Airlines, Inst Phys, Austriamicrosystems, Agilent Technologies, NIST, LOT ORIEL, Panasonic, ONR Off Naval Res, Volkswagen, USAF Off Sci Res, European Off Aerosp Res & Dev, USAF Res Lab, Darpa
DE InN; doping; p-type; capacitance-voltage
AB Capacitance-voltage measurements using a liquid electrolyte as rectifying contact were used to provide definitive proof of p-type activity beneath a surface inversion layer in Mg-doped InN. Net acceptor concentrations in the low to mid 10(19) cm(-3) were observed for InN films with Mg concentrations in the 10(20)-10(21) cm(-3) range.
C1 Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA.
   [Jones, R. E.; Li, S. X.; Haller, E. E.] Univ Calif, Dept Mat Sci & Engin, Berkeley, CA USA.
   [Schaff, W. J.] Cornell Univ, Dept Electr & Comp Engn, Ithaca, NY USA.
   Cornell Univ, Ithaca, NY 14853 USA.
RP Ager, JW (reprint author), Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA.
RI Yu, Kin Man/J-1399-2012; 
OI Yu, Kin Man/0000-0003-1350-9642; Ager, Joel/0000-0001-9334-9751
FU Office of Science; Office of Basic Energy Sciences; Division of
   Materials Sciences and Engineering; U.S. Department of Energy
   [DE-AC02-05CH11231]; Cornell University; ONR [N000149910936]
FX This work was supported by the Director, Office of Science, Office of
   Basic Energy Sciences, Division of Materials Sciences and Engineering,
   of the U.S. Department of Energy under Contract No. DE-AC02- 05CH11231.
   The work at Cornell University was supported by ONR under contract No.
   N000149910936.
NR 3
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0397-0
J9 AIP CONF PROC
PY 2007
VL 893
BP 343
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics,
   Multidisciplinary; Physics, Condensed Matter
SC Engineering; Optics; Physics
GA BGE22
UT WOS:000246281800168
ER

PT S
AU Drichko, IL
   Smirnov, IY
   Suslov, AV
   Mironov, M
   Mironov, OA
   Whall, TE
   Galperin, YM
   Vinokur, VM
AF Drichko, I. L.
   Smirnov, I. Yu.
   Suslov, A. V.
   Mironov, M.
   Mironov, O. A.
   Whall, T. E.
   Galperin, Yu. M.
   Vinokur, V. M.
BE Jantsch, W
   Schaffler, F
TI AC conductance in p-type Si/SiGe heterostructures in the ultra-quantum
   limit
SO PHYSICS OF SEMICONDUCTORS, PTS A AND B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 28th International Conference on the Physics of Semiconductors (ICPS-28)
CY JUL 24-28, 2006
CL Vienna, AUSTRIA
SP Austrian Res Ctr, Infineon, Austrian Fed Minist Educ, Sci & Culture, FFG, Austrian Nano Initiat, Vienna Convent Bur, ICPS 27, Marabun Res, Raith, Int Union Pure & Appl Phys, NMA Networking, Austrian Soc Micro & Nanoelect, Austrian Airlines, Inst Phys, Austriamicrosystems, Agilent Technologies, NIST, LOT ORIEL, Panasonic, ONR Off Naval Res, Volkswagen, USAF Off Sci Res, European Off Aerosp Res & Dev, USAF Res Lab, Darpa
DE low-dimensional systems; high-frequency conductivity; localization;
   high-magnetic fields
AB Low-temperature conductance mechanism in low-density Si/SiGe hetero structures in high magnetic fields (ultra-quantum limit) is studied using AC and DC transport measurements. Evidence of the Wigner crystal in this regime is given.
C1 [Drichko, I. L.; Smirnov, I. Yu.; Galperin, Yu. M.] RAS, AF Ioffe Physicotech Inst, 26 Polytek Skaya, St Petersburg 194021, Russia.
   [Suslov, A. V.] Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
   [Mironov, M.] Musashi Inst Technol, Setagaya Ku, Tokyo, Japan.
   [Mironov, O. A.] NANOTEC, Phathumthan 12120, Thailand.
   [Whall, T. E.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
   [Galperin, Yu. M.] Univ Oslo, Dept Phys & SMN, N-0316 Oslo, Norway.
   [Vinokur, V. M.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Drichko, IL (reprint author), RAS, AF Ioffe Physicotech Inst, 26 Polytek Skaya, St Petersburg 194021, Russia.
RI Smirnov, Ivan/E-4685-2014; Suslov, Alexey/M-7511-2014; 
OI Suslov, Alexey/0000-0002-2224-153X; Mironov, Oleg A./0000-0002-9787-944X
FU Presidium RAS; RAS "Spintronika"; NSF [DMR-0084173]; State of Florida;
   NHMFL-IHRP; NANOTEC (Thailand); U.S.Department of Energy Office of
   Science [W-31-109-ENG-38];  [RFFI 04-02-16246]
FX This work was supported by RFFI 04-02-16246, Presidium RAS, Prg.of RAS
   "Spintronika",NSF DMR-0084173,State of Florida, NHMFL-IHRP and NANOTEC
   (Thailand) and by the U.S. Department of Energy Office of Science hrough
   Contract No.W-31-109-ENG-38. Authors are grateful to V.M. Pudalov for
   useful discussions
NR 4
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0397-0
J9 AIP CONF PROC
PY 2007
VL 893
BP 557
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics,
   Multidisciplinary; Physics, Condensed Matter
SC Engineering; Optics; Physics
GA BGE22
UT WOS:000246281800273
ER

PT S
AU Goupalov, SV
   Satishkumar, BC
   Doorn, SK
AF Goupalov, S. V.
   Satishkumar, B. C.
   Doorn, S. K.
BE Jantsch, W
   Schaffler, F
TI Transition level dependence of Raman intensities in carbon nanotubes:
   Role of exciton
SO PHYSICS OF SEMICONDUCTORS, PTS A AND B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 28th International Conference on the Physics of Semiconductors (ICPS-28)
CY JUL 24-28, 2006
CL Vienna, AUSTRIA
SP Austrian Res Ctr, Infineon, Austrian Fed Minist Educ, Sci & Culture, FFG, Austrian Nano Initiat, Vienna Convent Bur, ICPS 27, Marabun Res, Raith, Int Union Pure & Appl Phys, NMA Networking, Austrian Soc Micro & Nanoelect, Austrian Airlines, Inst Phys, Austriamicrosystems, Agilent Technologies, NIST, LOT ORIEL, Panasonic, ONR Off Naval Res, Volkswagen, USAF Off Sci Res, European Off Aerosp Res & Dev, USAF Res Lab, Darpa
DE carbon nanotubes; Raman spectroscopy; exciton-phonon coupling
AB We present the first direct comparison of intensities of Raman scattering from the radial breathing mode of semiconducting single-walled carbon nanotubes under excitations resonant with different electronic transitions.
C1 [Goupalov, S. V.] AF Ioffe Phys Tech Inst, Politekhnicheskaya 26, St Petersburg 194021, Russia.
   [Satishkumar, B. C.; Doorn, S. K.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Goupalov, SV (reprint author), AF Ioffe Phys Tech Inst, Politekhnicheskaya 26, St Petersburg 194021, Russia.
FU US DOE; Prof. R.E. Smalley's group at Rice University
FX This work was supported by the US DOE. NT samples were provided by Prof.
   R.E. Smalley's group at Rice University.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0397-0
J9 AIP CONF PROC
PY 2007
VL 893
BP 1019
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics,
   Multidisciplinary; Physics, Condensed Matter
SC Engineering; Optics; Physics
GA BGE22
UT WOS:000246281800502
ER

PT S
AU Bradbury, FR
   Tyryshkin, AM
   Sabouret, G
   Bokor, J
   Schenkel, T
   Lyon, SA
AF Bradbury, F. R.
   Tyryshkin, Alexei M.
   Sabouret, Guillaume
   Bokor, Jeff
   Schenkel, Thomas
   Lyon, S. A.
BE Jantsch, W
   Schaffler, F
TI Stark tuning of donor electron spins in silicon
SO PHYSICS OF SEMICONDUCTORS, PTS A AND B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 28th International Conference on the Physics of Semiconductors (ICPS-28)
CY JUL 24-28, 2006
CL Vienna, AUSTRIA
SP Austrian Res Ctr, Infineon, Austrian Fed Minist Educ, Sci & Culture, FFG, Austrian Nano Initiat, Vienna Convent Bur, ICPS 27, Marabun Res, Raith, Int Union Pure & Appl Phys, NMA Networking, Austrian Soc Micro & Nanoelect, Austrian Airlines, Inst Phys, Austriamicrosystems, Agilent Technologies, NIST, LOT ORIEL, Panasonic, ONR Off Naval Res, Volkswagen, USAF Off Sci Res, European Off Aerosp Res & Dev, USAF Res Lab, Darpa
DE electron spin resonance; silicon; donors; quantum computing; Stark
   effect
ID ECHOES
AB We report Stark shift measurements for Sb-121 donor electron spins in silicon using pulse electron spin resonance. Interdigitated metal gates on a Sb-implanted Si-28 epi-layer are used to apply the electric fields. Two quadratic Stark effects are resolved: a decrease of the hyperfine coupling between electron and nuclear spins of the donor and a decrease in electron Zeeman g-factor. A significant linear Stark effect is also observed, which we suggest arises from strain. We discuss the results in the context of the Kane model quantum computer.
C1 [Bradbury, F. R.; Tyryshkin, Alexei M.; Sabouret, Guillaume; Lyon, S. A.] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA.
   [Bokor, Jeff; Schenkel, Thomas] E O Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   [Bokor, Jeff] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA.
RP Bradbury, FR (reprint author), Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA.
FU Army Research Office; Advanced Research and Development Activity
   [DAAD19-02-1-0040]; Lawrence Berkeley National Labs; National Security
   Agency [MOD707501]; Department of Energy [DE-AC02-05CH11231]; National
   Science Foundation [0404208]
FX The authors would like to thank Igor Trofimov, Shyam Shankar, Rogerio de
   Sousa, Mark Friesen, Lloyd Hollenberg, and Cameron Wellard for helpful
   discussions. This research was supported at Princeton by the Army
   Research Office and the Advanced Research and Development Activity under
   Contract No. DAAD19-02-1-0040, and at Lawrence Berkeley National Labs by
   the National Security Agency under Army Research Office Contract No.
   MOD707501, the Department of Energy under Contract No.
   DE-AC02-05CH11231, and the National Science Foundation under Grant No.
   0404208.
NR 9
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0397-0
J9 AIP CONF PROC
PY 2007
VL 893
BP 1093
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics,
   Multidisciplinary; Physics, Condensed Matter
SC Engineering; Optics; Physics
GA BGE22
UT WOS:000246281800537
ER

PT S
AU Wang, DM
   Ren, YH
   Liu, X
   Cho, YJ
   Furdyna, JK
   Grinisditch, M
   Merlin, R
AF Wang, D. M.
   Ren, Y. H.
   Liu, X.
   Cho, Y. J.
   Furdyna, J. K.
   Grinisditch, M.
   Merlin, R.
BE Jantsch, W
   Schaffler, F
TI Ultrafast magneto-optical Kerr study of standing spin waves in
   ferromagnetic GaMnAs films
SO PHYSICS OF SEMICONDUCTORS, PTS A AND B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 28th International Conference on the Physics of Semiconductors (ICPS-28)
CY JUL 24-28, 2006
CL Vienna, AUSTRIA
SP Austrian Res Ctr, Infineon, Austrian Fed Minist Educ, Sci & Culture, FFG, Austrian Nano Initiat, Vienna Convent Bur, ICPS 27, Marabun Res, Raith, Int Union Pure & Appl Phys, NMA Networking, Austrian Soc Micro & Nanoelect, Austrian Airlines, Inst Phys, Austriamicrosystems, Agilent Technologies, NIST, LOT ORIEL, Panasonic, ONR Off Naval Res, Volkswagen, USAF Off Sci Res, European Off Aerosp Res & Dev, USAF Res Lab, Darpa
DE ferromagnetic semiconductors; GaMnAs; spin waves; spin stiffness
ID SEMICONDUCTORS; GA1-XMNXAS
AB We report on the observation of standing spin waves in thin films of the ferromagnetic semiconductor GaMnAs in time-resolved magneto-optical Kerr measurements. We observe two modes, one of Which is the near-uniform spin excitation. From the magnetic-field dependence of the frequencies and the ratio between the intensities of these modes, we obtain the spin stiffness D as well as the bulk and surface anisotropies. For as-grolAm samples with similar to 5-6% concentration of Mn, D = 6 +/- 1 T(.)nm(2) while D = 18 +/- 3 (25 +/- 4) T(.)nm(2) for a 3% Mn as-grown (annealed) sample. The surface anisotropy is negative.
C1 [Wang, D. M.; Ren, Y. H.; Merlin, R.] Univ Michigan, Focus Ctr, Ann Arbor, MI 48109 USA.
   [Wang, D. M.; Ren, Y. H.; Merlin, R.] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
   [Liu, X.; Cho, Y. J.; Furdyna, J. K.] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
   [Grinisditch, M.] Argonne Natl Lab, Mat Sci Div, Argonne, IL 60439 USA.
RP Wang, DM (reprint author), Univ Michigan, Focus Ctr, Ann Arbor, MI 48109 USA.; Wang, DM (reprint author), Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
RI Cho, YongJin/A-1143-2013; 
OI Merlin, Roberto/0000-0002-5584-0248
FU NSF Focus Physics Frontier Center; NSF [0603752]
FX This work was supported by the NSF Focus Physics Frontier Center and NSF
   Grant DMR 0603752.
NR 8
TC 1
Z9 1
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0397-0
J9 AIP CONF PROC
PY 2007
VL 893
BP 1175
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics,
   Multidisciplinary; Physics, Condensed Matter
SC Engineering; Optics; Physics
GA BGE22
UT WOS:000246281800576
ER

PT S
AU Stone, PR
   Scarpulla, MA
   Farshchi, R
   Sharp, ID
   Beeman, JW
   Yu, KM
   Arenholz, E
   Denlinger, J
   Haller, EE
   Dubon, OD
AF Stone, P. R.
   Scarpulla, M. A.
   Farshchi, R.
   Sharp, I. D.
   Beeman, J. W.
   Yu, K. M.
   Arenholz, E.
   Denlinger, J.
   Haller, E. E.
   Dubon, O. D.
BE Jantsch, W
   Schaffler, F
TI Mn L3,2X-ray absorption spectroscopy and magnetic circular dichroism in
   ferromagnetic Ga1-xMnxP
SO PHYSICS OF SEMICONDUCTORS, PTS A AND B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 28th International Conference on the Physics of Semiconductors (ICPS-28)
CY JUL 24-28, 2006
CL Vienna, AUSTRIA
SP Austrian Res Ctr, Infineon, Austrian Fed Minist Educ, Sci & Culture, FFG, Austrian Nano Initiat, Vienna Convent Bur, ICPS 27, Marabun Res, Raith, Int Union Pure & Appl Phys, NMA Networking, Austrian Soc Micro & Nanoelect, Austrian Airlines, Inst Phys, Austriamicrosystems, Agilent Technologies, NIST, LOT ORIEL, Panasonic, ONR Off Naval Res, Volkswagen, USAF Off Sci Res, European Off Aerosp Res & Dev, USAF Res Lab, Darpa
DE ferromagnetic semiconductors; x-ray magnetic circular dichroism (XMCD);
   gallium manganese phosphide; gallium manganese arsenide
AB We have measured the X-ray absorption (XAS) and X-ray magnetic circular dichroism (XMCD) at the Mn L-3,L-2 edges in ferromagnetic Ga1-xMnxP films for 0.018 <= x <= 0.042. Large XMCD asymmetries at the L-3 edge indicate significant spin-polarization of the density of states at the Fermi energy. The spectral shapes of the XAS and XMCD are nearly identical with those for Ga1-xMnxAs indicating that the hybridization of Mn d states and anion p states is similar in the two materials. Finally, compensation with sulfur donors not only lowers the ferromagnetic Curie temperature but also reduces the spin polarization of the hole states.
C1 [Stone, P. R.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
   [Stone, P. R.; Scarpulla, M. A.; Farshchi, R.; Sharp, I. D.; Beeman, J. W.; Yu, K. M.; Haller, E. E.; Dubon, O. D.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   [Arenholz, E.; Denlinger, J.] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Stone, PR (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
RI Yu, Kin Man/J-1399-2012; Sharp, Ian/I-6163-2015; 
OI Yu, Kin Man/0000-0003-1350-9642; Sharp, Ian/0000-0001-5238-7487;
   Scarpulla, Michael/0000-0002-6084-6839
FU Office of Science; Office of Basic Energy Sciences; Division of
   Materials Sciences and Engineering; U.S. Department of Energy
   [DE-AC02-05CH11231]; NDSEG
FX This work is supported by the Director, Office of Science, Office of
   Basic Energy Sciences, Division of Materials Sciences and Engineering,
   of the U.S. Department of Energy under Contract No. DE-AC02- 05CH11231.
   PRS acknowledges support from a NDSEG Fellowship.
NR 7
TC 5
Z9 5
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0397-0
J9 AIP CONF PROC
PY 2007
VL 893
BP 1177
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics,
   Multidisciplinary; Physics, Condensed Matter
SC Engineering; Optics; Physics
GA BGE22
UT WOS:000246281800577
ER

PT S
AU Yu, KM
   Walukiewicz, W
   Farshchi, R
   Dubon, OD
   Ager, JW
   Sharp, ID
   Haller, EE
AF Yu, K. M.
   Walukiewicz, W.
   Farshchi, R.
   Dubon, O. D.
   Ager, J. W., III
   Sharp, I. D.
   Haller, E. E.
BE Jantsch, W
   Schaffler, F
TI Synthesis and optical properties of multiband III-V semiconductor alloys
SO PHYSICS OF SEMICONDUCTORS, PTS A AND B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 28th International Conference on the Physics of Semiconductors (ICPS-28)
CY JUL 24-28, 2006
CL Vienna, AUSTRIA
SP Austrian Res Ctr, Infineon, Austrian Fed Minist Educ, Sci & Culture, FFG, Austrian Nano Initiat, Vienna Convent Bur, ICPS 27, Marabun Res, Raith, Int Union Pure & Appl Phys, NMA Networking, Austrian Soc Micro & Nanoelect, Austrian Airlines, Inst Phys, Austriamicrosystems, Agilent Technologies, NIST, LOT ORIEL, Panasonic, ONR Off Naval Res, Volkswagen, USAF Off Sci Res, European Off Aerosp Res & Dev, USAF Res Lab, Darpa
DE multiband semiconductors; intermediate band solar cells; pulsed laser
   melting; GaAsP
ID BAND
AB Quaternary GaNxAs1-yPy alloys have been synthesized using N ion implantation into GaAs1-yPy (y=0-0.4) epilayers followed by pulsed laser melting (II-PLM). We observed strong optical transitions from the valence band to both the lower (E-) and upper (E,) conduction subbands that arise from the N induced splitting of the conduction band (E-M) of the GaAs1-yPy host. As predicted by the band anticrossing model, GaNxAs1-x-yPy with y > 0.3 is a three band semiconductor alloy with potential applications for high-efficiency intermediate band solar cells.
C1 [Yu, K. M.; Walukiewicz, W.; Farshchi, R.; Dubon, O. D.; Ager, J. W., III; Sharp, I. D.; Haller, E. E.] Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   [Farshchi, R.; Dubon, O. D.; Sharp, I. D.; Haller, E. E.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
RP Yu, KM (reprint author), Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RI Yu, Kin Man/J-1399-2012; Sharp, Ian/I-6163-2015; 
OI Yu, Kin Man/0000-0003-1350-9642; Sharp, Ian/0000-0001-5238-7487; Ager,
   Joel/0000-0001-9334-9751
FU Director's Innovation Initiative Program, National Reconnaissance Office
   and the Director, Office of Science; Office of Basic Energy Sciences,
   Division of Materials Sciences and Engineering, of the U.S. Department
   of Energy [DE-AC02-05CH11231]
FX This work was supported by the Director's Innovation Initiative Program,
   National Reconnaissance Office and the Director, Office of Science,
   Office of Basic Energy Sciences, Division of Materials Sciences and
   Engineering, of the U.S. Department of Energy under Contract No .
   DE-AC02-05CH11231 .
NR 7
TC 1
Z9 1
U1 0
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0397-0
J9 AIP CONF PROC
PY 2007
VL 893
BP 1477
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics,
   Multidisciplinary; Physics, Condensed Matter
SC Engineering; Optics; Physics
GA BGE22
UT WOS:000246281800725
ER

PT J
AU Fairbairn, M
   Kraan, AC
   Milstead, DA
   Sjostrand, T
   Skands, P
   Sloan, T
AF Fairbairn, M.
   Kraan, A. C.
   Milstead, D. A.
   Sjostrand, T.
   Skands, P.
   Sloan, T.
TI Stable massive particles at colliders
SO PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
LA English
DT Review
DE review; experimental results; colliders SMP; monopole; SUSY; extra
   dimensions
ID HIGHLY IONIZING PARTICLES; MEDIATED SUPERSYMMETRY-BREAKING;
   FRACTIONALLY-CHARGED-PARTICLES; MAGNETIC MONOPOLE DETECTOR; IMAGING
   CHERENKOV DETECTOR; NON-TOPOLOGICAL SOLITONS; HUBBLE-SPACE-TELESCOPE;
   QUANTUM FIELD-THEORY; GEV CM ENERGY; DARK-MATTER
AB We review the theoretical motivations and experimental status of searches for stable massive particles (SMPs) which could be sufficiently long-lived as to be directly detected at collider experiments. The discovery of such particles would address a number of important questions in modern physics including the origin and composition of dark matter in the universe and the unification of the fundamental forces. This review describes the techniques used in SNIP-searches at collider experiments and the limits so far obtained on the production of SMPs which possess various colour, electric and magnetic charge quantum numbers. We also describe theoretical scenarios which predict SMPs along with the phenomenology needed to model their production at colliders and interactions with matter. In addition, the interplay between collider searches and open questions in cosmology such as dark matter composition is addressed. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Stockholm, S-10691 Stockholm, Sweden.
   Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA.
   Lund Univ, Dept Theoret Phys, S-22100 Lund, Sweden.
   Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA.
   Univ Lancaster, Dept Phys, Lancaster LA1 4YW, England.
RP Milstead, DA (reprint author), Univ Stockholm, S-10691 Stockholm, Sweden.
EM milstead@physto.se
OI Skands, Peter/0000-0003-0024-3822; Sjostrand,
   Torbjorn/0000-0002-7630-8605
NR 381
TC 166
Z9 166
U1 1
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-1573
EI 1873-6270
J9 PHYS REP
JI Phys. Rep.-Rev. Sec. Phys. Lett.
PD JAN
PY 2007
VL 438
IS 1
BP 1
EP 63
DI 10.1016/j.physrep.2006.10.002
PG 63
WC Physics, Multidisciplinary
SC Physics
GA 137TJ
UT WOS:000244314800001
ER

PT J
AU Pascalutsa, V
   Vanderhaeghen, M
   Yang, SN
AF Pascalutsa, Vladimir
   Vanderhaeghen, Marc
   Yang, Shin Nan
TI Electromagnetic excitation of the Delta(1232)-resonance
SO PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
LA English
DT Review
DE Delta(1232); electromagnetic form factors; Meson production; chiral
   Lagrangians
ID CHIRAL PERTURBATION-THEORY; ELECTRIC FORM-FACTOR; GENERALIZED PARTON
   DISTRIBUTIONS; NEUTRAL PION-PHOTOPRODUCTION; BARYON MAGNETIC-MOMENTS;
   VIRTUAL COMPTON-SCATTERING; CONSTITUENT QUARK-MODEL; RARITA-SCHWINGER
   FIELD; MESON-EXCHANGE MODEL; LARGE-N-C
AB We review the description of the lowest-energy nucleon excitation-the Delta (1232)-resonance. Much of the recent experimental effort has been focused on the precision measurements of the nucleon-to-Delta transition by means of electromagnetic probes. We confront the results of these measurements with the state-of-the-art calculations based on chiral effective-field theories (EFT), lattice Quantum Chromodynamics (QCD), large-N-c relations, perturbative QCD, and QCD-inspired models. We also discuss the link of the nucleon-to-Delta form factors to generalized parton distributions (GPDs). Some of the theoretical approaches are reviewed in detail, in particular, recent dynamical and unitary-isobar models of pion electroproduction, which are extensively used in the interpretation of experiments. A novel extension of chiral EFTs to the energy domain of the Delta-resonance is reviewed. The two-photon exchange effects in the electroexcitation of the Delta-resonance are addressed. (c) 2006 Elsevier B.V. All rights reserved.
C1 Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan.
   Natl Taiwan Univ, Ctr Theoret Sci, Taipei 10617, Taiwan.
   Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA.
   Jefferson Lab, Ctr Theory, Newport News, VA 23606 USA.
   ECT, I-38050 Villazzano, Trento, Italy.
RP Yang, SN (reprint author), Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan.
EM snyang@phys.ntu.edu.-tw
NR 361
TC 171
Z9 174
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-1573
EI 1873-6270
J9 PHYS REP
JI Phys. Rep.-Rev. Sec. Phys. Lett.
PD JAN
PY 2007
VL 437
IS 5-6
BP 125
EP 232
DI 10.1016/j.physrep.2006.09.006
PG 108
WC Physics, Multidisciplinary
SC Physics
GA 141IK
UT WOS:000244571800001
ER

PT J
AU Kresin, VZ
   Ovchinnikov, YN
   Wolf, SA
AF Kresin, Vladimir Z.
   Ovchinnikov, Yurii N.
   Wolf, Stuart A.
TI Inhomogeneous superconductivity and the pseudogap state of novel
   superconductors (vol 431, pg 231, 2006)
SO PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
LA English
DT Correction
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   Russian Acad Sci, LD Landau Theoret Phys Inst, Moscow 117334, Russia.
   Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22903 USA.
   Univ Virginia, Dept Phys, Charlottesville, VA 22903 USA.
RP Kresin, VZ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM vzkresin@lbl.gov
RI Wolf, Stuart/A-7513-2009
NR 1
TC 2
Z9 2
U1 1
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-1573
J9 PHYS REP
JI Phys. Rep.-Rev. Sec. Phys. Lett.
PD JAN
PY 2007
VL 437
IS 5-6
BP 233
EP 234
DI 10.1016/j.physrep.2006.10.001
PG 2
WC Physics, Multidisciplinary
SC Physics
GA 141IK
UT WOS:000244571800002
ER

PT J
AU Kadel, RW
AF Kadel, Richard W.
TI Why no Einstein's, laws?
SO PHYSICS TODAY
LA English
DT Letter
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Kadel, RW (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM rwkadel@lbl.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0031-9228
J9 PHYS TODAY
JI Phys. Today
PD JAN
PY 2007
VL 60
IS 1
BP 12
EP 13
DI 10.1063/1.2709536
PG 2
WC Physics, Multidisciplinary
SC Physics
GA 121IU
UT WOS:000243152100007
ER

PT J
AU Crease, RP
AF Crease, Robert P.
TI Critical point the lost art of the letter
SO PHYSICS WORLD
LA English
DT Editorial Material
C1 SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA.
   Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Crease, RP (reprint author), SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA.
EM rcrease@notes.cc.sunysb.edu
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-8585
J9 PHYS WORLD
JI Phys. World
PD JAN
PY 2007
VL 20
IS 1
BP 15
EP 15
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 126DI
UT WOS:000243492000021
ER

PT J
AU Burgess, EA
   Wagner, ID
   Wiegel, J
AF Burgess, Elizabeth A.
   Wagner, Isaac D.
   Wiegel, Juergen
BE Gerday, C
   Glansdorff, N
TI Thermal Environments and Biodiversity
SO PHYSIOLOGY AND BIOCHEMISTRY OF EXTREMOPHILES
LA English
DT Article; Book Chapter
ID SEA HYDROTHERMAL VENT; YELLOWSTONE-NATIONAL-PARK; THERMOPHILIC ANAEROBIC
   BACTERIUM; UPPER TEMPERATURE LIMIT; GREAT-ARTESIAN-BASIN; MICROBIAL
   COMMUNITY STRUCTURE; SPRING CYANOBACTERIAL MAT; SULFATE-REDUCING
   BACTERIA; RIFTIA-PACHYPTILA JONES; MILOS ISLAND GREECE
C1 [Burgess, Elizabeth A.] Savannah River Ecol Lab, Aiken, SC 29803 USA.
   [Wagner, Isaac D.] Univ Georgia, Dept Microbiol, Athens, GA 30602 USA.
   [Wiegel, Juergen] Univ Georgia, Dept Microbiol, Athens, GA 30602 USA.
RP Burgess, EA (reprint author), Savannah River Ecol Lab, Aiken, SC 29803 USA.
NR 168
TC 6
Z9 6
U1 0
U2 0
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N STREET NW, WASHINGTON, DC 20036-2904 USA
BN 978-1-55581-581-3
PY 2007
BP 13
EP 29
PG 17
WC Microbiology
SC Microbiology
GA BPD98
UT WOS:000278640400004
ER

PT J
AU Robb, FT
   Newby, DT
AF Robb, Frank T.
   Newby, Deborah T.
BE Gerday, C
   Glansdorff, N
TI Functional Genomics in Thermophilic Microorganisms
SO PHYSIOLOGY AND BIOCHEMISTRY OF EXTREMOPHILES
LA English
DT Article; Book Chapter
ID ARCHAEON PYROCOCCUS-FURIOSUS; LATERAL GENE-TRANSFER; HEAT-SHOCK
   RESPONSE; DNA MICROARRAY ANALYSIS; UPPER TEMPERATURE LIMIT;
   HYPERTHERMOPHILIC ARCHAEON; METHANOCOCCUS-JANNASCHII;
   THERMOTOGA-MARITIMA; KEY ROLE; SULFOLOBUS-SOLFATARICUS
C1 [Robb, Frank T.] Univ Maryland, Ctr Marine Biotechnol, Baltimore, MD 21202 USA.
   [Newby, Deborah T.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Robb, FT (reprint author), Univ Maryland, Ctr Marine Biotechnol, 701 E Pratt St, Baltimore, MD 21202 USA.
NR 60
TC 2
Z9 2
U1 0
U2 1
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N STREET NW, WASHINGTON, DC 20036-2904 USA
BN 978-1-55581-581-3
PY 2007
BP 30
EP 38
PG 9
WC Microbiology
SC Microbiology
GA BPD98
UT WOS:000278640400005
ER

PT J
AU Daglis, IA
   Tsurutani, BT
   Gonzalez, WD
   Kozyra, JU
   Orsini, S
   Cladis, J
   Kamide, Y
   Henderson, MG
   Vassiliadis, D
AF Daglis, I. A.
   Tsurutani, B. T.
   Gonzalez, W. D.
   Kozyra, J. U.
   Orsini, S.
   Cladis, J.
   Kamide, Y.
   Henderson, M. G.
   Vassiliadis, D.
TI Key features of intense geospace storms - A comparative study of a solar
   maximum and a solar minimum storm
SO PLANETARY AND SPACE SCIENCE
LA English
DT Article
DE storms and substorms; solar wind-magnetosphere interactions;
   magnetosphere-ionosphere interactions; magnetospheric configuration and
   dynamics; energetic particles; trapped; current systems; particle
   acceleration
ID MAGNETOSPHERIC ION COMPOSITION; RING-CURRENT; GEOMAGNETIC STORM;
   MAGNETIC STORMS; ELECTRIC-FIELDS; FEBRUARY 1986; PARTICLE-ACCELERATION;
   PLASMA SHEET; O+ IONS; MAGNETOTAIL
AB This paper addresses the question of particular causes and dynamical characteristics of intense geospace storms through the comparative study of two specific examples: a solar maximum storm (4-6 June 1991) and a solar minimum storm (24-26 September 1998). We concentrate on issues pertaining to the origin, development, dynamical evolution and recovery of intense storms. The comparative study addresses the solar and interplanetary drivers, the ring current composition and its implications, the storm-substorm relationship, and the ring current decay. Our aim has been to identify features assumed common or repeatable and to elaborate on similarities or differences between two intense storms that are separated by 7 years and which occurred in different phases of the solar cycle. In view of planetary exploration, which is becoming the focus of space science both in the US and in Europe, classifying the drivers and parameters of solar-planetary connection is of particular interest. Solar system exploration will undoubtedly benefit from detailed knowledge of the conditions leading to intense geospace storms. The main conclusions of this paper can be listed as follows. More intense solar events do not necessarily result in more intense geospace storms. Storm development is driven by the appropriate interplanetary conditions; however, storm evolution is not defined by interplanetary conditions alone, but also by internal magnetospheric conditions - namely plasma sheet density and ion composition. Storm dynamics may also be modified by solar wind pressure. Magnetosphere-ionosphere coupling in the form of ionospheric outflow during storms presumably is the key to substorm, influence on storm dynamics; i.e., substorms influence storm development substantially, whenever they drive intense outflow of ionospheric-origin O+ ions into the magnetosphere. In particular, substorm-driven O+ outflow is one of the main features of intense storms. (c) 2006 Elsevier Ltd. All rights reserved.
C1 Natl Observ Athens, Inst Space Applicat & Remote Sensing, Athens 15236, Greece.
   CALTECH, Jet Propuls Lab, Pasadena, CA 91109 USA.
   Inst Pesquisas Espaciais, BR-12201970 Sao Paulo, Brazil.
   Univ Michigan, Space Phys Res Lab, Ann Arbor, MI 48109 USA.
   CNR, Ist Fis Spazio Interplanetario, I-00133 Rome, Italy.
   Lockheed Martin Space Phys Lab, Palo Alto, CA USA.
   Nagoya Univ, Solar Terr Environm Lab, Toyokawa, Japan.
   Los Alamos Natl Lab, Los Alamos, NM USA.
   NASA Goddard Space Flight Ctr, USRA, Greenbelt, MD 20771 USA.
RP Daglis, IA (reprint author), Natl Observ Athens, Inst Space Applicat & Remote Sensing, Athens 15236, Greece.
EM daglis@space.noa.gr; bruce.tsurutani@jpl.nasa.gov; gonzalez@dge.inpe.br;
   jukozyra@umich.edu; orsini@ifsi.rm.cnr.it; cladis@mail.spasci.com;
   kamide@stelab.nagoya-u.ac.jp; mghenderson@lanl.gov;
   vassi@electra.gsfc.nasa.gov
RI Daglis, Ioannis/L-6100-2013; Henderson, Michael/A-3948-2011
OI Daglis, Ioannis/0000-0002-0764-3442; Henderson,
   Michael/0000-0003-4975-9029
NR 68
TC 3
Z9 3
U1 0
U2 3
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0032-0633
J9 PLANET SPACE SCI
JI Planet Space Sci.
PD JAN
PY 2007
VL 55
IS 1-2
BP 32
EP 52
DI 10.1016/j.pss.2006.04.007
PG 21
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 130MK
UT WOS:000243803500004
ER

PT J
AU Kachroo, A
   Shanklin, J
   Whittle, E
   Lapchyk, L
   Hildebrand, D
   Kachroo, P
AF Kachroo, Aardra
   Shanklin, John
   Whittle, Edward
   Lapchyk, Ludmila
   Hildebrand, David
   Kachroo, Pradeep
TI The Arabidopsis stearoyl-acyl carrier protein-desaturase family and the
   contribution of leaf isoforms to oleic acid synthesis
SO PLANT MOLECULAR BIOLOGY
LA English
DT Article
DE SSI2/FAB2; Stearoyl-ACP-Desaturase; oleic acid; salicylic acid; jasmonic
   acid
ID DEFENSE GENE-EXPRESSION; COA DESATURASE; GLYCEROLIPID METABOLISM;
   ADIPOSE-TISSUE; JASMONIC ACID; MICE; RESISTANCE; LIVER; THALIANA; PLANTS
AB In plants, changes in the levels of oleic acid (18:1), a major monounsaturated fatty acid (FA), results in the alteration of salicylic acid (SA)- and jasmonic acid (JA)-mediated defense responses. This is evident in the Arabidopsis ssi2/fab2 mutant, which encodes a defective stearoyl-acyl carrier protein-desaturase (S-ACP-DES) and consequently accumulates high levels of stearic acid (18:0) and low levels of 18:1. In addition to SSI2, the Arabidopsis genome encodes six S-ACP-DES-like enzymes, the native expression levels of which are unable to compensate for a loss-of-function mutation in ssi2. The presence of low levels of 18:1 in the fab2 null mutant indicates that one or more S-ACP-DES isozymes contribute to the 18:1 pool. Biochemical assays show that in addition to SSI2, four other isozymes are capable of desaturating 18:0-ACP but with greatly reduced specific activities, which likely explains the inability of these SSI2 isozymes to substitute for a defective ssi2. Lines containing T-DNA insertions in S-ACP-DES1 and S-ACP-DES4 show that they are altered in their lipid profile but contain normal 18:1 levels. However, overexpression of the S-ACP-DES1 isoform in ssi2 plants results in restoration of 18:1 levels and thereby rescues all ssi2-associated phenotypes. Thus, high expression of a low specific activity S-ACP-DES is required to compensate for a mutation in ssi2. Transcript level of S-ACP-DES isoforms is reduced in high 18:1-containing plants. Enzyme activities of the desaturase isoforms in a 5-fold excess of 18:1-ACP show product inhibition of up to 73%. Together these data indicate that 18:1 levels are regulated at both transcriptional and post-translational levels.
C1 Univ Kentucky, Dept Plant Pathol, Lexington, KY 40546 USA.
   Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
   Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40546 USA.
RP Kachroo, A (reprint author), Univ Kentucky, Dept Plant Pathol, Lexington, KY 40546 USA.
EM apkach2@uky.edu; pk62@ukg.edu
NR 47
TC 92
Z9 114
U1 0
U2 20
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0167-4412
J9 PLANT MOL BIOL
JI Plant Mol.Biol.
PD JAN
PY 2007
VL 63
IS 2
BP 257
EP 271
DI 10.1007/s11103-006-9086-y
PG 15
WC Biochemistry & Molecular Biology; Plant Sciences
SC Biochemistry & Molecular Biology; Plant Sciences
GA 123WE
UT WOS:000243326100008
PM 17072561
ER

PT J
AU Cohen, RH
   Ryutov, DD
   Counsell, GF
   Helander, P
AF Cohen, R. H.
   Ryutov, D. D.
   Counsell, G. F.
   Helander, P.
TI Current and potential distribution in a divertor with
   toroidally-asymmetric biasing of the divertor plate
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article
ID PLASMA CONVECTION; BOUNDARY-CONDITIONS; SPHERICAL TOKAMAK; MAST; PHYSICS
AB Toroidally-asymmetric biasing of the divertor plates may increase convective cross-field transport in SOL and thereby reduce the divertor heat load. Experiments performed with the MAST spherical tokamak generally agree with a simple theory of non-axisymmetric biasing. However, some of the experimental results have not yet received a theoretical explanation. In particular, existing theory seems to overestimate the asymmetry between the positive and the negative biasing. Also lacking a theoretical explanation is the experimentally observed increase of the average floating potential in the main SOL in the presence of biasing. In this paper we attempt to solve these problems by accounting for the closing of the currents (driven by the biasing) in a strong-shear region near the X-point. We come up with a picture which, at least qualitatively, agrees with these experimental results.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
   UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.
RP Cohen, RH (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
NR 12
TC 7
Z9 7
U1 0
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0741-3335
J9 PLASMA PHYS CONTR F
JI Plasma Phys. Control. Fusion
PD JAN
PY 2007
VL 49
IS 1
BP 1
EP 13
DI 10.1088/0741-3335/49/1/001
PG 13
WC Physics, Fluids & Plasmas
SC Physics
GA 129SS
UT WOS:000243751000001
ER

PT J
AU Jaun, A
   Tracy, ER
   Kaufman, AN
AF Jaun, A.
   Tracy, E. R.
   Kaufman, A. N.
TI Eikonal waves, caustics and mode conversion in tokamak plasmas
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article
ID ION-CYCLOTRON WAVES; NUMERICAL-SIMULATION; TOROIDAL PLASMAS; GLOBAL
   WAVES
AB Ray optics is used to model the propagation of short electromagnetic plasma waves in toroidal geometry. The new RAYCON code evolves each ray independently in phase space, together with its amplitude, phase and focusing tensor to describe the transport of power along the ray. Particular emphasis is laid on caustics and mode conversion layers, where a linear phenomenon splits a single incoming ray into two. The complete mode conversion algorithm is described and tested for the first time, using the two space dimensions that are relevant in a tokamak. Applications are shown, using a cold plasma model to account for mode conversion at the ion-hybrid resonance in the Joint European Torus.
C1 Royal Inst Technol, NADA, S-10044 Stockholm, Sweden.
   Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA.
   Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RP Jaun, A (reprint author), Royal Inst Technol, NADA, S-10044 Stockholm, Sweden.
EM jaun@kth.se
NR 28
TC 14
Z9 14
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0741-3335
J9 PLASMA PHYS CONTR F
JI Plasma Phys. Control. Fusion
PD JAN
PY 2007
VL 49
IS 1
BP 43
EP 67
DI 10.1088/0741-3335/49/1/004
PG 25
WC Physics, Fluids & Plasmas
SC Physics
GA 129SS
UT WOS:000243751000004
ER

PT S
AU Meyer, R
   van Wijk, J
   Gernigon, L
AF Meyer, Romain
   van Wijk, Jolante
   Gernigon, Laurent
BE Foulger, GR
   Jurdy, DM
TI The North Atlantic Igneous Province: A review of models for its
   formation
SO PLATES, PLUMES AND PLANETARY PROCESSES
SE Geological Society of America Special Papers
LA English
DT Article; Book Chapter
DE North Atlantic Igneous Province; volcanic rifted margins; LIP formation;
   mantle plume versus alternatives; continent breakup
ID V-SHAPED RIDGES; PLUME-LITHOSPHERE INTERACTION; VOLCANIC CONTINENTAL
   MARGINS; SMALL-SCALE CONVECTION; ICELAND HOTSPOT TRACK; HIGH HE-3/HE-4
   RATIOS; DISKO WEST GREENLAND; HIGH-MGO LIQUIDS; K-AR AGES; MANTLE PLUME
AB The mantle plume concept is currently being challenged as an explanation for North Atlantic Igneous Province formation. Alternative models have been suggested, including delamination, meteorite impact, small-scale rift-related convection, and chemical mantle heterogeneities. We review available data sets on uplift, strain localization, age and chemistry of igneous material, and tomography for the North Atlantic Igneous Province and compare them with predictions from the mantle plume and alternative models. The mantle plume concept is quite successful in explaining the formation of the North Atlantic Igneous Province, but unexplained aspects remain. Delamination and impact models are currently not supported. Rift-related small-scale convection models appear to be able to explain volcanic rifted margin volcanism well. However, the most important problem that nonplume models need to overcome is the continuing, long-lived melt anomaly extending via the Greenland and Faeroe ridges to Iceland. Mantle heterogeneities resulting from an ancient subducted slab are included in plate tectonic models to explain the continuing melt production as an alternative to the mantle plume model, but there are still uncertainties related to this idea that need to be solved.
C1 [Meyer, Romain] Katholieke Univ Leuven, B-3001 Louvain, Belgium.
   [van Wijk, Jolante] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
   [Gernigon, Laurent] Geol Survey Norway, N-7491 Trondheim, Norway.
RP Meyer, R (reprint author), Katholieke Univ Leuven, Celestijnenlaan 200E, B-3001 Louvain, Belgium.
EM mail@romain-meyer.eu; jolante@lanl.gov; Laurent.Gernigon@ngu.no
NR 245
TC 30
Z9 31
U1 0
U2 4
PU GEOLOGICAL SOC AMER INC
PI BOULDER
PA 3300 PENROSE PL, PO BOX 9140, BOULDER, CO 80301 USA
SN 0072-1077
BN 978-0-8137-2430-0
J9 GEOL SOC AM SPEC PAP
PY 2007
VL 430
BP 525
EP 549
DI 10.1130/2007.2430(26)
PG 25
WC Geology; Geosciences, Multidisciplinary
SC Geology
GA BMA58
UT WOS:000271667800046
ER

PT J
AU Froula, JL
   Francino, MP
AF Froula, Jeffrey L.
   Francino, M. Pilar
TI Selection against Spurious Promoter Motifs Correlates with Translational
   Efficiency across Bacteria
SO PLOS ONE
LA English
DT Article
AB Because binding of RNAP to misplaced sites could compromise the efficiency of transcription, natural selection for the optimization of gene expression should regulate the distribution of DNA motifs capable of RNAP-binding across the genome. Here we analyze the distribution of the -10 promoter motifs that bind the sigma(70) subunit of RNAP in 42 bacterial genomes. We show that selection on these motifs operates across the genome, maintaining an over-representation of -10 motifs in regulatory sequences while eliminating them from the nonfunctional and, in most cases, from the protein coding regions. In some genomes, however, -10 sites are over-represented in the coding sequences; these sites could induce pauses effecting regulatory roles throughout the length of a transcriptional unit. For nonfunctional sequences, the extent of motif under-representation varies across genomes in a manner that broadly correlates with the number of tRNA genes, a good indicator of translational speed and growth rate. This suggests that minimizing the time invested in gene transcription is an important selective pressure against spurious binding. However, selection against spurious binding is detectable in the reduced genomes of host-restricted bacteria that grow at slow rates, indicating that components of efficiency other than speed may also be important. Minimizing the number of RNAP molecules per cell required for transcription, and the corresponding energetic expense, may be most relevant in slow growers. These results indicate that genome-level properties affecting the efficiency of transcription and translation can respond in an integrated manner to optimize gene expression. The detection of selection against promoter motifs in nonfunctional regions also confirms previous results indicating that no sequence may evolve free of selective constraints, at least in the relatively small and unstructured genomes of bacteria.
C1 [Froula, Jeffrey L.; Francino, M. Pilar] DOE Joint Genome Inst, Evolutionary Genom Program, Walnut Creek, CA USA.
RP Francino, MP (reprint author), DOE Joint Genome Inst, Evolutionary Genom Program, Walnut Creek, CA USA.
EM mpfrancino@lbl.gov
RI Francino, M. Pilar/H-9090-2015
OI Francino, M. Pilar/0000-0002-4510-5653
FU US Department of Energy's Office of Science; University of California,
   Lawrence Berkeley National Laboratory [DE-AC03-76SF00098]
FX This work has been performed under the auspices of the US Department of
   Energy's Office of Science, Biological and Environmental Research
   Program and by the University of California, Lawrence Berkeley National
   Laboratory under contract No. DE-AC03-76SF00098.
NR 51
TC 14
Z9 14
U1 0
U2 1
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PY 2007
VL 2
IS 8
AR e745
DI 10.1371/journal.pone.0000745
PG 11
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA V10HN
UT WOS:000207455200022
PM 17710145
ER

PT S
AU Fehske, H
   Trugman, SA
AF Fehske, H.
   Trugman, S. A.
BE Alexandrov, AS
TI Numerical Solution of the Holstein Polaron Problem
SO POLARONS IN ADVANCED MATERIALS
SE Springer Series in Materials Science
LA English
DT Article; Book Chapter
ID T-J MODEL; MOLECULAR-CRYSTAL MODEL; COLOSSAL-MAGNETORESISTANCE
   MANGANITES; HIGH-TEMPERATURE SUPERCONDUCTORS; ELECTRON-PHONON SYSTEMS;
   HUBBARD-MODEL; JAHN-TELLER; SPECTRAL FUNCTIONS; HIGH-T(C)
   SUPERCONDUCTORS; OPTICAL CONDUCTIVITY
C1 [Fehske, H.] Ernst Moritz Arndt Univ Greifswald, Inst Phys, D-17487 Greifswald, Germany.
   [Trugman, S. A.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Fehske, H (reprint author), Ernst Moritz Arndt Univ Greifswald, Inst Phys, D-17487 Greifswald, Germany.
EM holger.fehske@physik.uni-greifswald.de; sat@lanl.gov
NR 170
TC 35
Z9 35
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0933-033X
BN 978-1-4020-6347-3
J9 SPRINGER SER MATER S
PY 2007
VL 103
BP 393
EP 461
D2 10.1007/978-1-4020-6348-0
PG 69
WC Materials Science, Multidisciplinary; Polymer Science
SC Materials Science; Polymer Science
GA BJM19
UT WOS:000266791800011
ER

PT J
AU Thornberg, SM
   Bernstein, R
   Irwin, AN
   Derzon, DK
   Klamo, SB
   Clough, RL
AF Thornberg, Steven M.
   Bernstein, Robert
   Irwin, Adriane N.
   Derzon, Dora K.
   Klamo, Sara B.
   Clough, Roger L.
TI The genesis of CO2 and CO in the thermooxidative degradation of
   polypropylene
SO POLYMER DEGRADATION AND STABILITY
LA English
DT Article
DE carbon dioxide; isotopic labeling; polypropylene degradation; oxidation;
   degradation mechanism
ID THERMAL-OXIDATION; SOLID-STATE; ISOTACTIC POLYPROPYLENE; ATACTIC
   POLYPROPYLENE; INITIATED OXIDATIONS; POLYMER REACTIONS; PHOTOOXIDATION;
   POLYOLEFINS; PRODUCTS; PHOTO
AB Using a set of three isotactic polypropylene samples that had been individually labeled with carbon-13 at each of the three positions in the monomer unit, we conducted experiments to determine the position of origin of carbon monoxide and carbon dioxide that arise during thermal oxidation of this polymer. By GC-mass-spectral analysis, we find that 2/3 of the CO2 derives from the C(l) [methylene] carbon and the remaining 1/3 comes from the C(2) [tertiary] carbon, with none coming from the C(3) [methyl group] carbon. The CO also comes mainly from the C(l) [methylene] carbon (>= 80%). This is in contrast to the solid-phase oxidation products, which have been found (by C-13 NMR on these same labeled PP materials) to originate predominantly (80-85%) from oxidation at the C(2) [tertiary] carbon. These results can be understood in terms of the free-radical reactions that underlie the polypropylene oxidation chemistry. (c) 2006 Elsevier Ltd. All rights reserved.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
   CALTECH, Arnold & Mabel Beckman Labs Chem Synth, Pasadena, CA 91125 USA.
RP Clough, RL (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM traveler1949@comcast.net
RI Bernstein, Robert/F-8396-2013
NR 32
TC 17
Z9 17
U1 0
U2 8
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0141-3910
J9 POLYM DEGRAD STABIL
JI Polym. Degrad. Stabil.
PD JAN
PY 2007
VL 92
IS 1
BP 94
EP 102
DI 10.1016/j.polymdegradstab.2006.08.020
PG 9
WC Polymer Science
SC Polymer Science
GA 130MZ
UT WOS:000243805000012
ER

PT S
AU Mao, WL
   Campbell, AJ
   Prakapenka, VB
   Hemley, RJ
   Mao, HK
AF Mao, Wendy L.
   Campbell, Andrew J.
   Prakapenka, Vitali B.
   Hemley, Russell J.
   Mao, Ho-kwang
BE Hirose, K
   Brodholt, J
   Lay, T
   Yuen, D
TI Effect of Iron on the Properties of Post-Perovskite Silicate
SO POST-PEROVSKITE: THE LAST MANTLE PHASE TRANSITION
SE Geophysical Monograph Series
LA English
DT Article; Book Chapter
ID CORE-MANTLE BOUNDARY; EARTHS D''-LAYER; EQUATION-OF-STATE;
   PHASE-TRANSITION; (MG,FE)SIO3 PEROVSKITE; LOWERMOST MANTLE; VELOCITY
   ZONES; HIGH-PRESSURE; MGSIO3; ANISOTROPY
C1 [Mao, Wendy L.] Stanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305 USA.
   [Mao, Wendy L.] Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA.
   [Campbell, Andrew J.] Univ Maryland, Dept Geol, College Pk, MD 20742 USA.
   [Prakapenka, Vitali B.] Univ Chicago, GSECARS, Chicago, IL 60637 USA.
   [Hemley, Russell J.; Mao, Ho-kwang] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA.
RP Mao, WL (reprint author), Stanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305 USA.
NR 59
TC 4
Z9 4
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0065-8448
BN 978-0-87590-439-9
J9 GEOPHYS MONOGR SER
PY 2007
VL 174
BP 37
EP 46
DI 10.1029/174GM05
D2 10.1029/GM174
PG 10
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA BOG46
UT WOS:000276572600005
ER

PT J
AU Robertson, LW
   Berberian, I
   Borges, T
   Chen, LC
   Chow, CK
   Glauert, HP
   Filser, JG
   Thomas, H
AF Robertson, Larry W.
   Berberian, Isabelle
   Borges, Tim
   Chen, Li-Chuan
   Chow, Ching K.
   Glauert, Howard P.
   Filser, Johannes G.
   Thomas, Helmut
TI Suppression of Peroxisomal Enzyme Activities and Cytochrome P450 4A
   Isozyme Expression by Congeneric Polybrominated and Polychlorinated
   Biphenyls
SO PPAR RESEARCH
LA English
DT Article
AB The purpose of this study was to determine the effects of PCBs and PBBs on peroxisome proliferator-activated receptor-alpha-(PPAR alpha-) associated enzyme activities or protein levels. Male Sprague-Dawley rats were administered a single IP injection (150 mu mol/kg) of either 3,3', 4,4'-tetrabromobiphenyl, 3,3', 4,4'-tetrachlorobiphenyl, 3,3', 5,5'-tetrabromobiphenyl, 2', 3,3', 4,5-pentachlorobiphenyl, 3,3', 4,4', 5-pentachlorobiphenyl, 2,2', 3,3', 5,5'-hexachlorobiphenyl, or 3,3', 4,4', 5,5'-hexabromobiphenyl in corn oil (10 ml/kg). One week later, the activities of catalase, peroxisomal fatty acyl-CoA oxidase, and peroxisomal beta-oxidation as well as cytochrome P450 4A (CYP4A) protein content were determined in subcellular liver fractions. None of the peroxisomal enzyme activities were significantly increased by any of the halogenated biphenyl congeners tested. Except for minor (approx. 25%) increases in the total CYP4A content following treatment with 2,2', 3,3', 5,5'-hexachlorobiphenyl and 3,3', 5,5'-tetrabromobiphenyl, CYP4A protein contents were not increased by any treatment. The two Ah receptor agonists, 3,3', 4,4'-tetrabromobiphenyl and 3,3', 4,4', 5-pentachlorobiphenyl, significantly diminished the liver content of CYP4A proteins and activities of the peroxisomal enzymes studied. Since a range of congeners with different biologic and toxicologic activities were selected for this study, it may be concluded that the polyhalogenated biphenyls do not induce peroxisome proliferation in the male rat, but rather certain members of this class of compounds down regulate peroxisome-associated enzymes. Since PCBs and PBBs do not increase enzyme activities and expression of proteins associated with PPAR alpha, these agents are therefore exerting their carcinogenic and promoting activities by some other mechanism. Copyright (C) 2007 Larry W. Robertson et al.
C1 [Robertson, Larry W.; Berberian, Isabelle; Borges, Tim; Chen, Li-Chuan; Chow, Ching K.; Glauert, Howard P.] Univ Kentucky, Grad Ctr Toxicol, Lexington, KY 40506 USA.
   [Robertson, Larry W.] Univ Iowa, Coll Publ Hlth, Dept Occupat & Environm Hlth, Iowa City, IA 52242 USA.
   [Borges, Tim] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA.
   [Chow, Ching K.; Glauert, Howard P.] Univ Kentucky, Grad Ctr Nutr Sci, Lexington, KY 40506 USA.
   [Filser, Johannes G.] GSF Natl Res Ctr Environm & Hlth, Inst Toxicol, D-85716 Neuherberg, Germany.
   [Thomas, Helmut] Tranzyme Pharma Inc, Sherbrooke, PQ J1H 5N4, Canada.
RP Robertson, LW (reprint author), Univ Kentucky, Grad Ctr Toxicol, Funkhouser Bldg, Lexington, KY 40506 USA.
EM larry-robertson@uiowa.edu
FU NIH [ES07380, ES013661, CA01688]; Egyptian Embassy; Alexander von
   Humboldt Foundation; Kentucky Agricultural Experiment Station
FX The authors thank Vickie Tatum, Travis Lay, S.-Y. Li, and Monique
   Villermain for expert technical assistance. These studies were supported
   in part by NIH Grants no. ES07380, ES013661 and CA01688, a Peace
   Fellowship from the Egyptian Embassy (I. B.) by the Alexander von
   Humboldt Foundation, and by the Kentucky Agricultural Experiment
   Station.
NR 38
TC 0
Z9 0
U1 0
U2 0
PU HINDAWI PUBLISHING CORP
PI NEW YORK
PA 410 PARK AVENUE, 15TH FLOOR, #287 PMB, NEW YORK, NY 10022 USA
SN 1687-4757
EI 1687-4765
J9 PPAR RES
JI PPAR Res.
PY 2007
AR 15481
DI 10.1155/2007/15481
PG 5
WC Medicine, Research & Experimental
SC Research & Experimental Medicine
GA V13MT
UT WOS:000207671600001
ER

PT J
AU Kennedy, JA
   Howell, LL
   Greenwood, W
AF Kennedy, John A.
   Howell, Larry L.
   Greenwood, William
TI Compliant high-precision E-quintet ratcheting (CHEQR) mechanism for
   safety and arming devices
SO PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR
   PRECISION ENGINEERING AND NANOTECHNOLOGY
LA English
DT Article
DE compliant mechanisms; safety and arming; pseudo-rigid-body model;
   E-quintet
AB Ratchet and pawl mechanisms are used in safety applications to provide mechanical isolation between inputs and an output to insure that extreme environmental conditions do not inadvertently allow an unexpected output. These devices have become smaller and are approaching a size regime where traditional precision components, such as precision bearings and springs, are not available. This paper introduces the compliant high-precision E-quintet ratcheting (CHEQR) mechanism as a means of exploiting the advantages of compliant mechanisms to create safety devices that eliminate the need for bearings and springs. The pseudo-rigid-body model was used to design a mechanism with the desired force-deflection characteristics, and the result is a radical departure from traditional ratchet and pawl mechanisms. Large-scale proof-of-concept prototypes were followed by micro-wire EDM fabrication of precipitation hardened stainless steel devices with flexible segment widths of 50 mu m. The device was integrated with a 6 mm ratchet wheel and rotary solenoid actuator. (c) 2006 Elsevier Inc. All rights reserved.
C1 Brigham Young Univ, Dept Mech Engn, Provo, UT 84602 USA.
   Dynam Struct & Mat, Franklin, TN 37064 USA.
   Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Howell, LL (reprint author), Brigham Young Univ, Dept Mech Engn, Provo, UT 84602 USA.
EM lhowell@byu.edu
RI Howell, Larry/A-6828-2008
OI Howell, Larry/0000-0001-8132-8822
NR 19
TC 4
Z9 6
U1 1
U2 7
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0141-6359
J9 PRECIS ENG
JI Precis. Eng.-J. Int. Soc. Precis. Eng. Nanotechnol.
PD JAN
PY 2007
VL 31
IS 1
BP 13
EP 21
DI 10.1016/j.precisioneng.2006.01.001
PG 9
WC Engineering, Multidisciplinary; Engineering, Manufacturing; Nanoscience
   & Nanotechnology; Instruments & Instrumentation
SC Engineering; Science & Technology - Other Topics; Instruments &
   Instrumentation
GA 117OE
UT WOS:000242881800002
ER

PT S
AU Garemstani, H
   Li, DS
   Khaleel, MA
AF Garemstani, Harnid
   Li, Dongsheng
   Khaleel, Moe A.
BE Chang, YW
   Kim, NJ
   Lee, CS
TI Microstructure sensitive design and quantitative prediction of effective
   conductivity in fuel cell design
SO PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED
   MATERIALS AND PROCESSING, PTS 1-3
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 6th Pacific Rim International Conference on Advanced Materials and
   Processing
CY NOV 05-09, 2007
CL Cheju Isl, SOUTH KOREA
SP Korean Inst Met & Mat, Chinese Soc Met, Japan Inst Met, Minerals, Met & Mat Soc, Inst Mat Engn Australia
DE fuel cell; microstructure design; transport properties; porous medium
AB Statistical continuum approach is used to predict effective conductivity of anisotropic random porous heterogeneous media using two-point correlation functions. Probability functions play a critical role in describing the statistical distribution of different constituents in a heterogeneous media. In this study a 3-dimensional two-point correlation function is utilized to characterize the anisotropic porous media of a Cathode materials to incorporate all the details of the microstructure. These correlation functions are then linked to the effective properties using homogenization relations. An anisotropioc Green's function solution is used to solve the set of field equations. Examples in this study demonstrated how the model captured the anisotropy in effective conductivity of the random heterogeneous media. Predicted results showed the influence of microstructure on the effective conductivity tensor.
C1 [Garemstani, Harnid; Li, Dongsheng] Georgia Inst Technol, Sch Mech & Mat Engn, 771 Ferst Dr, Atlanta, GA 30332 USA.
   [Khaleel, Moe A.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Garemstani, H (reprint author), Georgia Inst Technol, Sch Mech & Mat Engn, 771 Ferst Dr, Atlanta, GA 30332 USA.
EM hg4l@mail.gatech.edu; dongshengli@gmail.com; moe.khaleel@pni.gov
OI khaleel, mohammad/0000-0001-7048-0749
FU DOE; (Idaho National Lab) Pacific Northwest National Laboratory
FX The support from the DOE (Idaho National Lab) Pacific Northwest National
   Laboratory is greatly appreciated.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2007
VL 561-565
BP 315
EP +
PN 1-3
PG 2
WC Metallurgy & Metallurgical Engineering; Materials Science, Composites
SC Metallurgy & Metallurgical Engineering; Materials Science
GA BHE49
UT WOS:000252473300072
ER

PT S
AU Liu, YD
   He, T
   Jiang, QW
   Ren, Y
   Wang, YD
   Zuo, L
AF Liu, Y. D.
   He, T.
   Jiang, Q. W.
   Ren, Y.
   Wang, Y. D.
   Zuo, L.
BE Chang, YW
   Kim, NJ
   Lee, CS
TI The study, on the microstructure characters of pure iron during cold
   rolling by high energy x-ray diffraction
SO PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED
   MATERIALS AND PROCESSING, PTS 1-3
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 6th Pacific Rim International Conference on Advanced Materials and
   Processing
CY NOV 05-09, 2007
CL Cheju Isl, SOUTH KOREA
SP Korean Inst Met & Mat, Chinese Soc Met, Japan Inst Met, Minerals, Met & Mat Soc, Inst Mat Engn Australia
DE HEXD; cold rolling; texture; grain orientation
ID IF-STEEL; DEFORMATION; POLYCRYSTALS; EVOLUTION; WORK
AB The microstructure characters of pure Iron during cold rolling were Studied by HEXD (high-energy x-ray diffraction). The experimental result shows that the Debby ring of HEXD before cold rolling is discrete and very strong, the discrete diffraction points become continue and smooth with the increase of cold rolling reduction. The {001}(110) textures transform to the {001}(uvw) texture after cold rolling, in this process the grains divisional are analyzed by the HEXD result.
C1 [Liu, Y. D.; He, T.; Wang, Y. D.; Zuo, L.] Northeastern Univ, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110004, Peoples R China.
   [Jiang, Q. W.] Anshan Iron & Steel Grp Corp, Fac Cold Rolling Silicon Steel, Anshan, Peoples R China.
   [Ren, Y.] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA.
RP Liu, YD (reprint author), Northeastern Univ, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110004, Peoples R China.
EM ydliu@mail.neu.edu.cn
RI wang, yandong/G-9404-2013
FU National Nature Science Foundation of China [50671021]; Program for New
   Century Excellent Talents in University [NCET-06-0287]
FX The research is supported by the National Nature Science Foundation of
   China (Grant No. 50671021) and Program for New Century Excellent Talents
   in University (Grant No. NCET-06-0287),.
NR 8
TC 8
Z9 8
U1 0
U2 0
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2007
VL 561-565
BP 889
EP +
PN 1-3
PG 2
WC Metallurgy & Metallurgical Engineering; Materials Science, Composites
SC Metallurgy & Metallurgical Engineering; Materials Science
GA BHE49
UT WOS:000252473301021
ER

PT S
AU Liu, S
   Lee, JH
   Trivedi, R
AF Liu, Shan
   Lee, J. H.
   Trivedi, R.
BE Chang, YW
   Kim, NJ
   Lee, CS
TI A model for lamellar-rod eutectic transition
SO PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED
   MATERIALS AND PROCESSING, PTS 1-3
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 6th Pacific Rim International Conference on Advanced Materials and
   Processing
CY NOV 05-09, 2007
CL Cheju Isl, SOUTH KOREA
SP Korean Inst Met & Mat, Chinese Soc Met, Japan Inst Met, Minerals, Met & Mat Soc, Inst Mat Engn Australia
ID GROWTH
AB Critical experiments in Al-Cu hypo-eutectic alloys have been carried out in capillary samples in order to establish the lamellar/rod eutectic transition condition. It is shown that this transition occurs over a range of compositions. Physics of the diffuse nature of this transition is proposed and the dynamics of the transition is shown to give a specific geometric relationship between the lamellar and rod spacing at the transition. A model of lamellar/rod eutectic transition is established that incorporates the dynamic nature of this transition and the anisotropy in interfacial energies.
C1 [Liu, Shan; Trivedi, R.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
   [Lee, J. H.] Changwon Natl Univ, Dept Mat Sci, Kyungna, South Korea.
RP Liu, S (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
FU DOE-BES [DE-AC02-07CH11358]
FX This work was supported by DOE-BES under Contract No. DE-AC02-07CH11358.
NR 8
TC 0
Z9 1
U1 2
U2 7
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2007
VL 561-565
BP 1003
EP +
PN 1-3
PG 2
WC Metallurgy & Metallurgical Engineering; Materials Science, Composites
SC Metallurgy & Metallurgical Engineering; Materials Science
GA BHE49
UT WOS:000252473301049
ER

PT S
AU Reigel, M
   Donohouel, C
   Burkes, D
   Moore, JJ
   Kennedy, JR
AF Reigel, M.
   Donohouel, C.
   Burkes, D.
   Moore, J. J.
   Kennedy, J. R.
BE Chang, YW
   Kim, NJ
   Lee, CS
TI Application of combustion synthesis to the production of actinide
   bearing nitride ceramic nuclear fuels
SO PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED
   MATERIALS AND PROCESSING, PTS 1-3
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 6th Pacific Rim International Conference on Advanced Materials and
   Processing
CY NOV 05-09, 2007
CL Cheju Isl, SOUTH KOREA
SP Korean Inst Met & Mat, Chinese Soc Met, Japan Inst Met, Minerals, Met & Mat Soc, Inst Mat Engn Australia
DE combustion synthesis; nitrides; nuclear fuel
AB Self-propagating high temperature (combustion) synthesis (SHS) is being used to develop several synthesis and processing routes for the next generation of ceramic nuclear fuels. These fuels are based on an actinide nitride within an inert matrix. The application of SHS is particularly important in the synthesis of americium (Am) based ceramics; since the rapid heating and cooling cycles used in this process will help to minimize vaporization loss of Am, which is a major problem in synthesizing Am-based ceramics. Manganese, praseodymium, and dysprosium are being used as physical and chemical surrogates for various actinides. Actinide nitride powders produced using auto-ignition combustion synthesis (AICS) are subsequently reacted with zirconium powder using SHS to produce a final fuel pellet. This paper will discuss the research to date on the synthesis of Am-N powders as well as the production of dense Zr-Am-N pellets as a model ceramic fuel system.
C1 [Reigel, M.; Donohouel, C.; Moore, J. J.] Colorado Sch Mines, Dept Met & Mat Engn, RSL, 1500 Illinois St, Golden, CO 80401 USA.
   [Burkes, D.; Kennedy, J. R.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Reigel, M (reprint author), Colorado Sch Mines, Dept Met & Mat Engn, RSL, 1500 Illinois St, Golden, CO 80401 USA.
EM mreigel@mines.edu; cdonohou@mines.edu; Douglas.Burkes@inl.gov;
   jjmoore@mines.edu; Rory.Kennedy@inl.gov
NR 4
TC 0
Z9 0
U1 0
U2 5
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2007
VL 561-565
BP 1749
EP +
PN 1-3
PG 2
WC Metallurgy & Metallurgical Engineering; Materials Science, Composites
SC Metallurgy & Metallurgical Engineering; Materials Science
GA BHE49
UT WOS:000252473302026
ER

PT S
AU Yang, L
   Zu, XT
   Xiao, HY
   Gao, F
   Wang, XY
   Liu, KZ
AF Yang, L.
   Zu, X. T.
   Xiao, H. Y.
   Gao, F.
   Wang, X. Y.
   Liu, K. Z.
BE Chang, YW
   Kim, NJ
   Lee, CS
TI Molecular dynamics study of helium-vacancy clusters production due to
   cascades in alpha-iron
SO PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED
   MATERIALS AND PROCESSING, PTS 1-3
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 6th Pacific Rim International Conference on Advanced Materials and
   Processing
CY NOV 05-09, 2007
CL Cheju Isl, SOUTH KOREA
SP Korean Inst Met & Mat, Chinese Soc Met, Japan Inst Met, Minerals, Met & Mat Soc, Inst Mat Engn Australia
DE He-vacancy cluster; temperature; He concentration; PKA energy
ID STAINLESS-STEEL; TEMPERATURE; IRRADIATION; SIMULATION; FE; CU
AB Molecular dynamics (MD) methods are utilized to study the displacement cascades in alpha-Fe containing different concentrations of substitutional He atoms. Primary knock-on atom (PKA) energies, E-p, from 0.5 keV to 20 keV are considered at a temperature of 100 K and 600 K, and the results are compared with those performed in pure alpha-Fe. There are distinct differences in the number and,size of defect clusters within displacement cascades with and without substitutional helium atoms. Particularly, the number and size of helium-vacancy clusters generally increase with increasing helium concentration and PKA energy. However, the number of He-vacancy (He-V) clusters increases with increasing temperature, the mean size of He-V clusters is independent on temperature for the same He concentration and energy recoils.
C1 [Yang, L.; Zu, X. T.; Xiao, H. Y.] Univ Elect Sci & Technol China, Dept Appl Phys, Chengdu 610054, Peoples R China.
   [Yang, L.] China West Normal Univ, Sch Phys & Elect Informat, Nanchang 637002, Jiangxi, Peoples R China.
   [Gao, F.] Pacific Northwest Natl Lab, Richland, WA 99352 USA.
   [Wang, X. Y.; Liu, K. Z.] China Acad Engn Phys, Natl Key Lab Surface Phy & Chem, Mianyang 621907, Peoples R China.
RP Yang, L (reprint author), Univ Elect Sci & Technol China, Dept Appl Phys, Chengdu 610054, Peoples R China.
NR 11
TC 2
Z9 2
U1 0
U2 2
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2007
VL 561-565
BP 1753
EP +
PN 1-3
PG 2
WC Metallurgy & Metallurgical Engineering; Materials Science, Composites
SC Metallurgy & Metallurgical Engineering; Materials Science
GA BHE49
UT WOS:000252473302027
ER

PT S
AU Hashimoto, N
   Byun, TS
AF Hashimoto, N.
   Byun, T. S.
BE Chang, YW
   Kim, NJ
   Lee, CS
TI Localized deformation in neutron-irradiated zirconium and ZIRCALOY-4
SO PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED
   MATERIALS AND PROCESSING, PTS 1-3
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 6th Pacific Rim International Conference on Advanced Materials and
   Processing
CY NOV 05-09, 2007
CL Cheju Isl, SOUTH KOREA
SP Korean Inst Met & Mat, Chinese Soc Met, Japan Inst Met, Minerals, Met & Mat Soc, Inst Mat Engn Australia
DE radiation effects; neutron irradiation; deformation; electron microscopy
ID METALS; MICROSTRUCTURE; VANADIUM
AB The effects of neutron-irradiation near 80 degrees C on the deformation behavior of hexagonal close packed (hcp) materials, zirconium and zircalloy-4, were investigated by transmission electron microscopy (TEM). Particular emphasis is placed on the deformation microstructure responsible for the changes in mechanical behavior. Neutron irradiation at low temperature up to 1 dpa induced a high number density of defect clusters, which resulted in irradiation-induced hardening. Dislocation channel deformation is observed for doses greater than 0.1 dpa, and is coincident with prompt plastic instability at yield. TEM analysis suggests that the loss of work hardening capacity in irradiated zirconium and zircaloy-4 at higher doses is mainly due to dislocation channels that are formed under a high local resolved shear stress, leading to the observed localized deformation.
C1 [Hashimoto, N.] Hokkaido Univ, Div Mat Sci & Engn, Grad Sch Engn, Sapporo, Hokkaido 0608628, Japan.
   [Byun, T. S.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Hashimoto, N (reprint author), Hokkaido Univ, Div Mat Sci & Engn, Grad Sch Engn, Sapporo, Hokkaido 0608628, Japan.
EM hasimoto@eng.hokudai.ac.jp; byunts@ornl.gov
NR 8
TC 4
Z9 4
U1 1
U2 7
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2007
VL 561-565
BP 1769
EP +
PN 1-3
PG 2
WC Metallurgy & Metallurgical Engineering; Materials Science, Composites
SC Metallurgy & Metallurgical Engineering; Materials Science
GA BHE49
UT WOS:000252473302031
ER

PT J
AU Koutsourelakis, PS
AF Koutsourelakis, P. S.
TI A note on the first-passage problem and VanMarcke's approximation -
   short communication
SO PROBABILISTIC ENGINEERING MECHANICS
LA English
DT Article
DE first-passage problem; binary process; Markov process
AB Given a scalar, stationary, Markov process, this short communication presents a closed-form solution for the first-passage problem for a fixed threshold b. The derivation is based on binary processes and the general formula of Siegert [Siegert AJF. On the first-passage time probability problem. Physical Review 195 1; 81:617-23]. The relation for the probability density function of the first-passage time is identical to the commonly used formula that was derived by VanMarcke [VanMarcke E. On the distribution of the first-passage time for normal stationary random processes. Journal of Applied Mechanics ASME 1975; 42:215-20] for Gaussian processes. The present derivation is based on more general conditions and reveals the criteria for the validity of the approximation. Properties of binary processes are also used to derive a hierarchy of upper bounds for any scalar process. (C) 2006 Elsevier Ltd. All rights reserved.
C1 Lawrence Livermore Natl Lab, Appl Stat & Econ Elect Engn Technol Div, Livermore, CA 94551 USA.
RP Koutsourelakis, PS (reprint author), Lawrence Livermore Natl Lab, Appl Stat & Econ Elect Engn Technol Div, L-227, Livermore, CA 94551 USA.
EM koutsourelakis2@llnl.gov
OI Koutsourelakis, Phaedon-Stelios/0000-0002-9345-759X
NR 5
TC 6
Z9 6
U1 0
U2 2
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0266-8920
J9 PROBABILIST ENG MECH
JI Probab. Eng. Eng. Mech.
PD JAN
PY 2007
VL 22
IS 1
BP 22
EP 26
DI 10.1016/j.probengmech.2006.05.003
PG 5
WC Engineering, Mechanical; Mechanics; Statistics & Probability
SC Engineering; Mechanics; Mathematics
GA 132ES
UT WOS:000243925900003
ER

PT J
AU Glazunov, GP
   Andreev, AA
   Baron, DI
   Causey, R
   Hassanein, A
   Konotopskiy, AL
   Patokin, AP
AF Glazunov, G. P.
   Andreev, A. A.
   Baron, D. I.
   Causey, R.
   Hassanein, A.
   Konotopskiy, A. L.
   Patokin, A. P.
TI HYDROGEN PERMEATION THROUGH VPD AND CVD TUNGSTEN FILMS ON PALLADIUM
SO PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY
LA English
DT Article
AB Isobars and isotherms were measured for hydrogen permeation through porous tungsten films on palladium, activation energy values were calculated for various Pd-W systems. The analysis of the obtained data and its comparison with the ones for dense tungsten coatings are carried out.
C1 [Glazunov, G. P.; Andreev, A. A.; Baron, D. I.; Konotopskiy, A. L.; Patokin, A. P.] NSC Kharkov Inst Phys & Technol, UA-61108 Kharkov, Ukraine.
   [Causey, R.] Sandia Natl Labs, Livermore, CA 94550 USA.
   [Hassanein, A.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Glazunov, GP (reprint author), NSC Kharkov Inst Phys & Technol, UA-61108 Kharkov, Ukraine.
FU Science and Technology Center in Ukraine (STCU) [3134]
FX This work was supported by the Science and Technology Center in Ukraine
   (STCU), project # 3134.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU KHARKOV INST PHYSICS & TECHNOLOGY
PI KHARKOV
PA NATL SCIENCE CTR, 1 AKADEMICHESKAYA ST, KHARKOV, 61108, UKRAINE
SN 1562-6016
J9 PROBL ATOM SCI TECH
JI Probl. At. Sci. Tech.
PY 2007
IS 1
BP 40
EP 42
PG 3
WC Nuclear Science & Technology; Physics, Fluids & Plasmas; Physics,
   Nuclear; Physics, Particles & Fields
SC Nuclear Science & Technology; Physics
GA V19QT
UT WOS:000208087600012
ER

PT J
AU Glazunov, GP
   Andreev, AA
   Bondarenko, MN
   Volkov, ED
   Konotopskiy, AL
   Causey, R
   Neklyudov, IM
   Odeychuk, NP
   Patokin, AP
   Sayenko, SY
   Surkov, AE
   Hassanein, A
AF Glazunov, G. P.
   Andreev, A. A.
   Bondarenko, M. N.
   Volkov, E. D.
   Konotopskiy, A. L.
   Causey, R.
   Neklyudov, I. M.
   Odeychuk, N. P.
   Patokin, A. P.
   Sayenko, S. Yu.
   Surkov, A. E.
   Hassanein, A.
TI Erosion behavior of the materials on basis of tungsten
SO PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY
LA Russian
DT Article
AB It is presented in this work the results of the erosion behavior examination of the materials on the basis of tungsten which have been produced with the use of different technologies (vacuum-arc coating deposition, chemical vapor deposition, hot pressing in a vacuum) under steady state Penning discharge plasma irradiation.
C1 [Glazunov, G. P.; Andreev, A. A.; Bondarenko, M. N.; Volkov, E. D.; Konotopskiy, A. L.; Neklyudov, I. M.; Odeychuk, N. P.; Patokin, A. P.; Sayenko, S. Yu.; Surkov, A. E.] Kharkov Phys Tech Inst, Natl Sci Ctr, Kharkov, Ukraine.
   [Causey, R.] Sandia Natl Labs, Livermore, CA 94550 USA.
   [Hassanein, A.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Glazunov, GP (reprint author), Kharkov Phys Tech Inst, Natl Sci Ctr, Kharkov, Ukraine.
NR 11
TC 1
Z9 1
U1 1
U2 1
PU KHARKOV INST PHYSICS & TECHNOLOGY
PI KHARKOV
PA NATL SCIENCE CTR, 1 AKADEMICHESKAYA ST, KHARKOV, 61108, UKRAINE
SN 1562-6016
J9 PROBL AT SCI TECH
JI Probl. At. Sci. Tech.
PY 2007
IS 4
BP 88
EP 93
PG 6
WC Nuclear Science & Technology; Physics, Fluids & Plasmas; Physics,
   Nuclear; Physics, Particles & Fields
SC Nuclear Science & Technology; Physics
GA 289EE
UT WOS:000255037000018
ER

PT J
AU Afanasev, AV
   Konchatnij, ML
   Merenkov, NP
AF Afanasev, A. V.
   Konchatnij, M. L.
   Merenkov, N. P.
TI Single-spin asymmetries in electron-proton and photon-proton scattering
   in the Bethe-Heitler processes induced by loop corrections
SO PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 2nd International Conference on Quantum Electrodynamics and Statistical
   Physics
CY SEP 19-23, 2006
CL Natl Sci Ctr, Kharkov Inst Phys & Technol, Kharkov, UKRAINE
SP Akhiezer Inst Theoret Phys, Karazin Kharkov Natl Univ
HO Natl Sci Ctr, Kharkov Inst Phys & Technol
AB The single-spin target asymmetries in the hard electroproduction process e(+) + p -> e(-) + gamma + p and in the e(+) e(-) - Pair photoproduction gamma + p -> e(+) + e(-) + p, induced by the loop radiative corrections to the vertex part of lepton interaction are considered. The physical reason to appearance such a kind of asymmetries is the nonzero imaginary part of the respective Bethe-Heitler amplitudes (on the level of radiative correction). The single-spin target asymmetries at unpolarized ingoing electron or photon beams and at arbitrary polarizations of the target proton for conditions of CLAS (Jefferson Lab, USA) and HERMES (DESY) experiments are calculated.
C1 [Afanasev, A. V.] Jefferson Lab, Newport News, VA 23606 USA.
   [Konchatnij, M. L.; Merenkov, N. P.] Kharkov Phys & Technol Inst, Ctr Nat Sci, UA-310108 Kharkov, Ukraine.
RP Afanasev, AV (reprint author), Jefferson Lab, Newport News, VA 23606 USA.
EM afanas@jlab.org; konchatnij@kipt.kharkov.ua; merenkov@kipt.kharkov.ua
NR 5
TC 0
Z9 0
U1 0
U2 0
PU KHARKOV INST PHYSICS & TECHNOLOGY
PI KHARKOV
PA NATL SCIENCE CTR, 1 AKADEMICHESKAYA ST, KHARKOV, 61108, UKRAINE
SN 1562-6016
J9 PROBL AT SCI TECH
JI Probl. At. Sci. Tech.
PY 2007
IS 3
BP 93
EP 97
PN 1
PG 5
WC Nuclear Science & Technology; Physics, Fluids & Plasmas; Physics,
   Nuclear; Physics, Particles & Fields
SC Nuclear Science & Technology; Physics
GA 289EC
UT WOS:000255036800019
ER

PT J
AU Chebotarev, VV
   Garkusha, IE
   Ladygina, MS
   Marchenko, AK
   Petrov, YV
   Solyakov, DG
   Tsarenko, AV
   Tereshin, VI
   Trubchaninov, SA
   Yelisyeyev, DV
   Hassanein, A
AF Chebotarev, V. V.
   Garkusha, I. E.
   Ladygina, M. S.
   Marchenko, A. K.
   Petrov, Yu. V.
   Solyakov, D. G.
   Tsarenko, A. V.
   Tereshin, V. I.
   Trubchaninov, S. A.
   Yelisyeyev, D. V.
   Hassanein, A.
TI DYNAMICS OF NITROGEN AND XENON PLASMA STREAMS GENERATED BY MPC DEVICE
SO PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY
LA English
DT Article
AB Magnetoplasma compressor (MPC) of compact geometry is developed for generation of dense plasma streams of different working gases. Discharge characteristics and parameters of the plasma streams, generated by MPC in different modes of operation are investigated. Dynamics of compression zone formation and energy efficiency of MPC are analyzed.
C1 [Chebotarev, V. V.; Garkusha, I. E.; Ladygina, M. S.; Marchenko, A. K.; Petrov, Yu. V.; Solyakov, D. G.; Tsarenko, A. V.; Tereshin, V. I.; Trubchaninov, S. A.; Yelisyeyev, D. V.] NSC Kharkov Inst Phys & Technol, Inst Plasma Phys, Kharkov, Ukraine.
   [Hassanein, A.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Chebotarev, VV (reprint author), NSC Kharkov Inst Phys & Technol, Inst Plasma Phys, Kharkov, Ukraine.
EM garkusha@ipp.kharkov.ua
NR 6
TC 2
Z9 2
U1 0
U2 0
PU KHARKOV INST PHYSICS & TECHNOLOGY
PI KHARKOV
PA NATL SCIENCE CTR, 1 AKADEMICHESKAYA ST, KHARKOV, 61108, UKRAINE
SN 1562-6016
J9 PROBL ATOM SCI TECH
JI Probl. At. Sci. Tech.
PY 2007
IS 1
BP 104
EP 106
PG 3
WC Nuclear Science & Technology; Physics, Fluids & Plasmas; Physics,
   Nuclear; Physics, Particles & Fields
SC Nuclear Science & Technology; Physics
GA V19QT
UT WOS:000208087600034
ER

PT B
AU Jean, E
   Jiao, Y
   Hurson, AR
   Potok, TE
AF Jean, Evens
   Jiao, Yu
   Hurson, Ali R.
   Potok, Thomas E.
GP IEEE Comp Soc
TI Boosting-based distributed and adaptive security-monitoring through
   agent collaboration
SO PROCEEDING OF THE 2007 IEEE/WIC/ACM INTERNATIONAL CONFERENCE ON WEB
   INTELLIGENCE AND INTELLIGENT AGENT TECHNOLOGY, WORKSHOPS
LA English
DT Proceedings Paper
CT IEEE/WIC/ACM International Conference on Intelligent Agent Technology
   and Web Intelligence
CY NOV 02-05, 2007
CL Fremont, CA
SP IEEE Comp Soc TCII, Web Intelligence Consortium, AMC SIGART
AB The use of mobile agents to support the development of practical applications is limited primarily by the risky to which hosts in the system are subject to. This article introduces a distributed and adaptive security-monitoring framework to decrease such potential threats. The proposed framework is based on a modified version of the popular Boosting algorithm to classify malicious agents based on their execution patterns on current and prior hosts. Having implemented the framework for the Aglet platform, we herein present the results of our experiments showcasing the detection of agent entities in the system with intention deviating from that of their well-behaved counterparts.
C1 [Jean, Evens; Hurson, Ali R.] Penn State Univ, Dept Comp Sci & Engn, University Pk, PA 16801 USA.
   [Jiao, Yu; Potok, Thomas E.] Oak Ridge Natl Lab, Comp Sci & Engn Div, Oak Ridge, TN 37831 USA.
RP Jean, E (reprint author), Penn State Univ, Dept Comp Sci & Engn, University Pk, PA 16801 USA.
EM Jean@cse.psu.edu; Jiaoy@ornl.gov; Hurson@cse.psu.edu; Potokte@ornl.gov
OI Potok, Thomas/0000-0001-6687-3435
NR 10
TC 1
Z9 1
U1 0
U2 0
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
BN 978-0-7695-3028-4
PY 2007
BP 516
EP +
DI 10.1109/WI-IATW.2007.52
PG 2
WC Computer Science, Artificial Intelligence; Computer Science, Information
   Systems; Computer Science, Software Engineering; Engineering, Electrical
   & Electronic
SC Computer Science; Engineering
GA BHH68
UT WOS:000253308500115
ER

PT B
AU Nguyeni, TD
   Jonesi, RE
   Boyce, BL
AF Nguyeni, Thao D.
   Jonesi, Reese E.
   Boyce, Brad L.
GP ASME
TI Modeling the anisotropic finite-deformation viscoelastic behavior of
   soft fiber-reinforced tissues
SO PROCEEDING OF THE ASME SUMMER BIOENGINEERING CONFERENCE - 2007
LA English
DT Proceedings Paper
CT ASME Summer Bioengineering Conference
CY JUN 24-28, 2007
CL Keystone, CO
SP ASME, Bioengn Div
C1 [Nguyeni, Thao D.; Jonesi, Reese E.] Sandia Natl Labs, Livermore, CA 94551 USA.
RP Nguyeni, TD (reprint author), Sandia Natl Labs, POB 969, Livermore, CA 94551 USA.
RI Boyce, Brad/H-5045-2012; Nguyen, Thao/A-3391-2010
OI Boyce, Brad/0000-0001-5994-1743; Nguyen, Thao/0000-0002-0312-1583
NR 4
TC 0
Z9 0
U1 0
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4798-5
PY 2007
BP 445
EP 446
PG 2
WC Engineering, Biomedical
SC Engineering
GA BHB85
UT WOS:000252105700223
ER

PT S
AU Ou, L
   He, X
   Engelmann, C
   Scott, SL
AF Ou, Li
   He, Xubin
   Engelmann, Christian
   Scott, Stephen L.
GP IEEE
TI A fast delivery protocol for total order broadcasting
SO PROCEEDINGS - 16TH INTERNATIONAL CONFERENCE ON COMPUTER COMMUNICATIONS
   AND NETWORKS, VOLS 1-3
SE IEEE International Conference on Computer Communications and Networks
LA English
DT Proceedings Paper
CT 16th International Conference on Computer Communications and Networks
CY AUG 13-16, 2007
CL Honolulu, HI
SP IEEE Commun Soc, Nokia
AB Sequencer, privilege-based, and communication history algorithms are popular approaches to implement total ordering, where communication history algorithms are most suitable for parallel computing systems, because they provide best performance under heavy work load. Unfortunately, post-transmission delay of communication history algorithms is most apparent when a system is idle. In this paper, we propose a fast delivery protocol to reduce the latency of message ordering. The protocol optimizes the total ordering process by waiting for messages only from a subset of the machines in the group, and by fast acknowledging messages on behalf of other machines. Our test results indicate that the fast delivery protocol is suitable for both idle and heavy load systems, while reducing the latency of message ordering.
C1 [Ou, Li; He, Xubin] Tennessee Technol Univ, Dept Elect & Comp Engn, Cookeville, TN 38505 USA.
   [Engelmann, Christian; Scott, Stephen L.] Oak Ridge Natl Lab, Comp Sci &Math Div, Oak Ridge, TN 37831 USA.
   [Engelmann, Christian] Univ Reading, Dept Comp Sci, Reading RG6 2AH, Berks, England.
RP Ou, L (reprint author), Tennessee Technol Univ, Dept Elect & Comp Engn, Cookeville, TN 38505 USA.
EM lou21@tntech.edu; hexb@tntech.edu; engelmanne@ornl.gov; scottsl@ornl.gov
NR 23
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-2055
BN 978-1-4244-1250-1
J9 IEEE IC COMP COM NET
PY 2007
BP 730
EP +
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BHZ27
UT WOS:000257636700117
ER

PT B
AU Seiber, L
   Armstrong, G
AF Seiber, Larry
   Armstrong, Gary
GP IEEE
TI Automated test stand for HEV capacitor testing
SO PROCEEDINGS IEEE SOUTHEASTCON 2007, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT IEEE SoutheastCon 2007
CY MAR 22-25, 2007
CL IEEE Virginia Council, Richmond, VA
SP IEEE
HO IEEE Virginia Council
AB As capacitor manufacturers race to meet the needs of the hybrid-electric vehicle (HEV) of the future, many trade-offs at the system level as well as the component level must be considered. Even though the ultra-capacitor has the spot light for recent research and development (R&D) for HEVs, the electrostatic capacitor is also the subject of R&D (for HEVs as well as wireless communications). The Department of Energy has funded the Oak Ridge National Laboratory's Power Electronic and Electric Machinery Research Center to develop an automated test to aid in the independent testing of prototype electrostatic capacitors. This paper describes the design and development of such a stand.
C1 [Seiber, Larry] Natl Transportat Res Ctr, Oak Ridge Natl Lab, Knoxville, TN 37932 USA.
   [Armstrong, Gary] Maverick Syst Inc, Kingston, TN 37763 USA.
RP Seiber, L (reprint author), Natl Transportat Res Ctr, Oak Ridge Natl Lab, Knoxville, TN 37932 USA.
EM lse@ornl.gov; gaa@mavsysinc.us
NR 12
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-1028-6
PY 2007
BP 63
EP +
DI 10.1109/SECON.2007.342856
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BHM52
UT WOS:000254279900017
ER

PT B
AU Butterfield, CPS
   Musial, W
   Jonkman, J
AF Butterfield, C. P. Sandy
   Musial, W.
   Jonkman, J.
BE Gu, W
   Oprisan, M
   Sun, L
TI Overview of offshore wind technology
SO PROCEEDINGS OF 2007 NON-GRID-CONNECTED WIND POWER SYSTEMS
LA English
DT Proceedings Paper
CT Symposium on Non-Grid-Connected Wind Power
CY NOV   02, 2007
CL Shanghai, PEOPLES R CHINA
SP Chinese Renewable Energy Ind Assoc, Chinese Wind Energy Assoc, Global Wind Energy Council, Jiangsu Inst Macroecon Res
DE wind turbine; offshore; floating; hydrodynamic behavior
AB Over the past 10 years, offshore wind energy has become a major focus of European wind energy research and deployment. Although current technology has been based mainly on land-based wind turbine designs, more turbines are being designed specifically for offshore applications. New standards have been developed to address the unique design environment imposed by loading from both turbulent wind and ocean wave forces acting on the blades, rotor nacelle assembly (RNA), and support structure. The rapid growth of offshore wind applications has presented new challenges to wind turbine engineers. Technology unique to offshore oil and gas industry must be joined with the design technology for wind turbines. This paper is a short overview of some of the challenges facing the growth of offshore wind technology.
C1 [Butterfield, C. P. Sandy; Musial, W.; Jonkman, J.] Natl Renewable Energy Lab, Golden, CO USA.
RP Butterfield, CPS (reprint author), Natl Renewable Energy Lab, Golden, CO USA.
NR 18
TC 0
Z9 0
U1 1
U2 1
PU AMERICAN SCHOLARS PRESS
PI MARIETTA
PA 3238 HARVEST WAY, MARIETTA, GA 30062 USA
BN 978-0-9798471-1-0
PY 2007
BP 419
EP 427
PG 9
WC Energy & Fuels
SC Energy & Fuels
GA BHY07
UT WOS:000257376000051
ER

PT B
AU Kazmerski, LL
AF Kazmerski, Lawrence L.
BE Goswami, DY
   Zhao, YW
TI Photovoltaics at the tipping point: Taking us from the evolutionary to
   the revolutionary
SO PROCEEDINGS OF ISES SOLAR WORLD CONGRESS 2007: SOLAR ENERGY AND HUMAN
   SETTLEMENT, VOLS I-V
LA English
DT Proceedings Paper
CT Solar World Congress of the International-Solar-Energy-Society
CY SEP 18-21, 2007
CL Beijing, PEOPLES R CHINA
SP Int Solar Energy Soc
AB We examine the current situation and future technology opportunities for solar photovoltaics (PV), emphasizing the importance of both policy and technology investments for the future markets and competitiveness of this solar approach. We review some examples of policy significantly impacting world markets and discuss the targets of the new U.S. Solar America Initiative. On the technology side, we present insights to technical and other investments needed to tip PV to its next level of contribution as a significant clean-energy partner in the world energy portfolio. The need to venture into disruptive and revolutionary technology pathways is argued for our needs in the mid term (the next 10-15 years) and the long term (beyond the first quarter of this century).
C1 Natl Renewable Energy Lab, NCPV, Golden, CO 80401 USA.
RP Kazmerski, LL (reprint author), Natl Renewable Energy Lab, NCPV, Golden, CO 80401 USA.
NR 6
TC 0
Z9 0
U1 0
U2 4
PU TSINGHUA UNIVERSITY PRESS
PI BEIJING
PA TSINGHUA UNIVERSITY HAIDIANQU, BEIJING 100084, PEOPLES R CHINA
BN 978-7-302-16146-2
PY 2007
BP 110
EP 117
PG 8
WC Construction & Building Technology; Energy & Fuels; Materials Science,
   Coatings & Films
SC Construction & Building Technology; Energy & Fuels; Materials Science
GA BHF11
UT WOS:000252634500016
ER

PT B
AU Renne, DS
   Kelly, M
   Elliott, D
   George, R
   Scott, G
   Haymes, S
   Heimiller, D
   Milbrandt, A
   Cowlin, S
   Gilman, P
   Perez, R
AF Renne, David S.
   Kelly, Marguerite
   Elliott, Dennis
   George, Ray
   Scott, George
   Haymes, Steve
   Heimiller, Donna
   Milbrandt, Anelia
   Cowlin, Shannon
   Gilman, Paul
   Perez, Richard
BE Goswami, DY
   Zhao, YW
TI Solar and wind resource assessments for Afghanistan and Pakistan
SO PROCEEDINGS OF ISES SOLAR WORLD CONGRESS 2007: SOLAR ENERGY AND HUMAN
   SETTLEMENT, VOLS I-V
LA English
DT Proceedings Paper
CT Solar World Congress of the International-Solar-Energy-Society
CY SEP 18-21, 2007
CL Beijing, PEOPLES R CHINA
SP Int Solar Energy Soc
AB The U.S. National Renewable Energy Laboratory (NREL) has recently completed the production of high-resolution wind and solar energy resource maps and related data products for Afghanistan and Pakistan. The resource data have been incorporated into a geospatial toolkit (GsT), which allows the user to manipulate the resource information along with country-specific geospatial information such as highway networks, power facilities, transmission corridors, protected land areas, etc. The toolkit allows users to then transfer resource data for specific locations into NREL's micropower optimization model known as HOMER.
C1 [Renne, David S.; Kelly, Marguerite; Elliott, Dennis; George, Ray; Scott, George; Haymes, Steve; Heimiller, Donna; Milbrandt, Anelia; Cowlin, Shannon; Gilman, Paul] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Renne, DS (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
NR 8
TC 1
Z9 1
U1 0
U2 3
PU TSINGHUA UNIVERSITY PRESS
PI BEIJING
PA TSINGHUA UNIVERSITY HAIDIANQU, BEIJING 100084, PEOPLES R CHINA
BN 978-7-302-16146-2
PY 2007
BP 134
EP 140
PG 7
WC Construction & Building Technology; Energy & Fuels; Materials Science,
   Coatings & Films
SC Construction & Building Technology; Energy & Fuels; Materials Science
GA BHF11
UT WOS:000252634500020
ER

PT B
AU Wang, Q
   Page, MR
   Iwaniczko, E
   Xu, Y
   Roybal, L
   Bauer, R
   Levi, D
   Yan, YF
   Meier, D
   Wang, TH
   Branz, HM
AF Wang, Qi
   Page, M. R.
   Iwaniczko, E.
   Xu, Yq
   Roybal, L.
   Bauer, R.
   Levi, D.
   Yan, Y. F.
   Meier, D.
   Wang, T. H.
   Branz, H. M.
BE Goswami, DY
   Zhao, YW
TI Silicon hetero junction solar cells by hot-wire cvd
SO PROCEEDINGS OF ISES SOLAR WORLD CONGRESS 2007: SOLAR ENERGY AND HUMAN
   SETTLEMENT, VOLS I-V
LA English
DT Proceedings Paper
CT Solar World Congress of the International-Solar-Energy-Society
CY SEP 18-21, 2007
CL Beijing, PEOPLES R CHINA
SP Int Solar Energy Soc
AB We are reporting high performance silicon heterojuncton (SHJ) solar cells fabricated using the hot-wire chemical vapor deposition (HWCVD) technique. On p-type c-Si float-zone wafers, we used an amorphous n/i contact to the top surface and an i/p contact to the back surface to obtain an open circuit voltage (V-oc) of 0.67 V in a 1 cm(2) cell with an independent confirmed efficiency of 18.2%. This is the best reported p-type SHJ solar cell, at least by IfWCVD. On n-type c-Si float-zone wafers, we used an amorphous (p/i) front emitter and an a-Si:H (i/n) back contact to achieve a V-oc of 0.69 V on 1 cm(2) cell. We found that proper c-Si surface cleaning prior to the amorphous Si deposition and double-heterojunction is a key to the high V-oc. In the heterojunction region, an abrupt interface from c-Si to a-Si:H results in a high V-oc; while incorporating a transition to either microcrystalline or epitaxial Si at the c-Si interface results in a low V-oc. Lifetime measurement shows that the back surface recombination velocity can be reduced to similar to 15 cm/s through a-Si:H passivation. Amorphous silicon heterojunction layers on crystalline wafers thus combine low-surface recombination velocity with excellent carrier extraction. The advantages of using HWCVD in comparing with plasma-enhanced CVD are the fast deposition rate and, more important, a wide range of deposition parameters enabling formation of an effective heterojunction with high V-oc. Further, the heterojuction cell processing is entirely below 200 degrees C making it one of the few promising low-stress methods for the manufacturing of next generation ultra-thin Si wafer solar cells.
C1 [Wang, Qi; Page, M. R.; Iwaniczko, E.; Xu, Yq; Roybal, L.; Bauer, R.; Levi, D.; Yan, Y. F.; Meier, D.; Wang, T. H.; Branz, H. M.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Wang, Q (reprint author), Natl Renewable Energy Lab, 1610 Cole Blvd, Golden, CO 80401 USA.
NR 12
TC 0
Z9 0
U1 1
U2 4
PU TSINGHUA UNIVERSITY PRESS
PI BEIJING
PA TSINGHUA UNIVERSITY HAIDIANQU, BEIJING 100084, PEOPLES R CHINA
BN 978-7-302-16146-2
PY 2007
BP 1144
EP 1147
PG 4
WC Construction & Building Technology; Energy & Fuels; Materials Science,
   Coatings & Films
SC Construction & Building Technology; Energy & Fuels; Materials Science
GA BHF11
UT WOS:000252634501039
ER

PT B
AU Gebert, LH
   Yang, PY
   Li, YP
   Li, XG
AF Gebert, L. H.
   Yang Peiyao
   Li Yuanpu
   Li Xiuguo
BE Goswami, DY
   Zhao, YW
TI Sino-US cooprative engineering demonstration of ground source heat pump
   (GSHP) system and its development in China
SO PROCEEDINGS OF ISES SOLAR WORLD CONGRESS 2007: SOLAR ENERGY AND HUMAN
   SETTLEMENT, VOLS I-V
LA English
DT Proceedings Paper
CT Solar World Congress of the International-Solar-Energy-Society
CY SEP 18-21, 2007
CL Beijing, PEOPLES R CHINA
SP Int Solar Energy Soc
AB Demonstration of GSHP system are presented. The development of GSHP technology is described briefly as well.
C1 [Gebert, L. H.] US DOE, Washington, DC 20585 USA.
RP Gebert, LH (reprint author), US DOE, Washington, DC 20585 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU TSINGHUA UNIVERSITY PRESS
PI BEIJING
PA TSINGHUA UNIVERSITY HAIDIANQU, BEIJING 100084, PEOPLES R CHINA
BN 978-7-302-16146-2
PY 2007
BP 2501
EP 2505
PG 5
WC Construction & Building Technology; Energy & Fuels; Materials Science,
   Coatings & Films
SC Construction & Building Technology; Energy & Fuels; Materials Science
GA BHF11
UT WOS:000252634502048
ER

PT B
AU Boyack, KW
   Borner, K
   Klavans, R
AF Boyack, Kevin W.
   Boerner, Katy
   Klavans, Richard
BE TorresSalinas, D
   Moed, HF
TI Mapping the structure and evolution of chemistry research
SO PROCEEDINGS OF ISSI 2007: 11TH INTERNATIONAL CONFERENCE OF THE
   INTERNATIONAL SOCIETY FOR SCIENTOMETRICS AND INFORMETRICS, VOLS I AND II
LA English
DT Proceedings Paper
CT 11th International Conference of the
   International-Society-for-Scientometrics-and-Informetrics
CY JUN 25-27, 2007
CL Madrid, SPAIN
SP Int Soc Scientometr & Informetr, CSIC, Minist Educ & Ciencia, FECYT, Comunidad Madrid, Eugene Garfield Fdn, Thomson, Elsevier, Journal Informetr, Scopus, Ayuntamiento Madrid, Sci Metrix, Univ Carlos III Madrid
DE mapping chemistry; journal mapping; dynamics; diffusion
ID JOURNAL COCITATION ANALYSIS; SCIENCE-CITATION-INDEX; MAPS
AB How does our collective scholarly knowledge grow over time? What major areas of science exist and how are they interlinked? Which areas are major knowledge producers; which ones are consumers? Computational scientometrics - the application of bibliometric/scientometric methods to large-scale scholarly datasets - and the communication of results via maps of science might help us answer these questions. This paper represents the results of a prototype study that aims to map the structure and evolution of chemistry research over a 30 year time frame. Information from the combined Science (SCIE) and Social Science (SSCI) Citations Indexes from 2002 was used to generate a disciplinary map of 7.227 journals and 671 journal clusters. Clusters relevant to study the structure and evolution of chemistry were identified using JCR categories and were further clustered into 14 disciplines. The changing scientific composition of these 14 disciplines and their knowledge exchange via citation linkages was computed. Major changes on the dominance, influence, and role of Chemistry, Biology, Biochemistry, and Bioengineering over these 30 years are discussed. The paper concludes with suggestions for future work.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
EM kbovack@sandia.gov; katy@indiana.edu; rklavans@mapofscience.com
OI Boyack, Kevin/0000-0001-7814-8951
NR 17
TC 5
Z9 5
U1 7
U2 12
PU INT SOC SCIENTOMETRICS & INFORMETRICS-ISSI
PI LEUVEN
PA KATHOLIEKE UNIV LEUVEN, FACULTEIT E T E W, DEKENSTRAAT 2, LEUVEN,
   B-3000, BELGIUM
PY 2007
BP 112
EP 123
PG 12
WC Information Science & Library Science
SC Information Science & Library Science
GA BGS34
UT WOS:000250317700011
ER

PT B
AU Boyack, KW
AF Boyack, Kevin W.
BE TorresSalinas, D
   Moed, HF
TI Using detailed maps of science to identify potential collaborations
SO Proceedings of ISSI 2007: 11th International Conference of the
   International Society for Scientometrics and Informetrics, Vols I and II
LA English
DT Proceedings Paper
CT 11th International Conference of the
   International-Society-for-Scientrometrics-and-Informetrics
CY JUN 25-27, 2007
CL Madrid, SPAIN
SP Int Soc Scientrometr & Informetr, CSIC, Minist Educ & Ciencia, FECYT, Comunidad Madrid, Eugene Garfield Fdn, Thomson Sci, Elsevier, Journal Informetr, Scopus, Ayuntamiento Madrid, Sci Metrix, Univ Carlos III Madrid
DE mapping science; paper-level maps; research communities; vitality;
   collaboration
AB Research on the effects of collaboration in scientific research has been increasing in recent years. A variety of studies have been done at the institution and country level, many with an eye toward policy implications. However, the question of how to identify the most fruitful targets for future collaboration in high-performing areas of science has not been addressed. This paper presents a method for identifying targets for future collaboration between two institutions. The utility of the method is shown in two different applications: identifying specific potential collaborations at the author level between two institutions, and generating an index that can be used for strategic planning purposes. Identification of these potential collaborations is based on finding authors that belong to the same small paper-level community, using a paper-level map of science from the combined 2003 SCIE/SSCI/Proceedings databases containing nearly 1 million papers organized into 117,435 communities.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
OI Boyack, Kevin/0000-0001-7814-8951
NR 13
TC 0
Z9 0
U1 0
U2 1
PU INT SOC SCIENTOMETRICS & INFORMETRICS-ISSI
PI LEUVEN
PA KATHOLIEKE UNIV LEUVEN, FACULTEIT E T E W, DEKENSTRAAT 2, LEUVEN,
   B-3000, BELGIUM
PY 2007
BP 124
EP 135
PG 12
WC Information Science & Library Science
SC Information Science & Library Science
GA BGS34
UT WOS:000250317700012
ER

PT S
AU Konning, B
   Engelmann, C
   Scott, SL
   Geist, GA
AF Koenning, B.
   Engelmann, C.
   Scott, S. L.
   Geist, G. A.
BE ElBaz, D
   Bourgeois, J
   Spies, F
TI Virtualized environments for the harness high performance computing
   workbench
SO PROCEEDINGS OF THE 16TH EUROMICRO CONFERENCE ON PARALLEL, DISTRIBUTED
   AND NETWORK-BASED PROCESSING
SE Euromicro Conference on Parallel Distributed and Network-based
   Processing
LA English
DT Proceedings Paper
CT 16th Euromicro International Conference on Parallel, Distributed and
   Network-Based Processing
CY FEB 13-15, 2008
CL Toulouse, FRANCE
SP Sun Microsyst, Minist Delegue Recherche, Ctr Natl Recherche Sci, Univ Paul Sabatier, CNRS LAAS, SGI, Reg Midi Pyrenees, Mairie Toulouse, Haute Garonne
AB This paper describes recent accomplishments in providing a virtualized environment concept and prototype for scientific application development and deployment as part of the Harness High-Performance Computing (HPC) Workbench research effort. The presented work focuses on tools and mechanisms that simplify scientific application development and deployment tasks, such that only minimal adaptation is needed when moving from one HPC system to another or after HPC system upgrades. The overall technical approach focuses on the concept of adapting the HPC system environment to the actual needs of individual scientific applications instead of the traditional scheme of adapting scientific applications to individual HPC system environment properties. The presented prototype implementation is based on the mature and lightweight chroot virtualization approach for Unix-type systems with a focus on virtualized file system structure and virtualized shell environment variables utilizing virtualized environment configuration descriptions in Extensible Markup Language (XML) format. The presented work can be easily extended to other virtualization technologies, such as system-level virtualization solutions using hypervisors.
C1 [Koenning, B.; Engelmann, C.; Scott, S. L.; Geist, G. A.] Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA.
RP Konning, B (reprint author), Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA.
EM b.koenning@reading.ac.uk; c.engelmann@reading.ac.uk
NR 22
TC 0
Z9 0
U1 0
U2 0
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
SN 1066-6192
BN 978-0-7695-3089-5
J9 EUROMICRO WORKSHOP P
PY 2007
BP 133
EP 140
DI 10.1109/PDP.2008.14
PG 8
WC Computer Science, Theory & Methods
SC Computer Science
GA BHM36
UT WOS:000254266500019
ER

PT S
AU Vallee, G
   Naughton, T
   Engelmann, C
   Ong, H
   Scott, SL
AF Vallee, Geoffroy
   Naughton, Thomas
   Engelmann, Christian
   Ong, Hong
   Scott, Stephen L.
BE ElBaz, D
   Bourgeois, J
   Spies, F
TI System-level virtualization for high performance computing
SO PROCEEDINGS OF THE 16TH EUROMICRO CONFERENCE ON PARALLEL, DISTRIBUTED
   AND NETWORK-BASED PROCESSING
SE Euromicro Conference on Parallel Distributed and Network-Based
   Processing
LA English
DT Proceedings Paper
CT 16th Euromicro International Conference on Parallel, Distributed and
   Network-Based Processing
CY FEB 13-15, 2008
CL Toulouse, FRANCE
SP Sun Microsyst, Minist Delegue Recherche, Ctr Natl Recherche Sci, Univ Paul Sabatier, CNRS LAAS, SGI, Reg Midi Pyrenees, Mairie Toulouse, Haute Garonne
AB System-level virtualization has been a research topic since the 70's but regained popularity during the past few years because of the availability of efficient solution such as Xen and the implementation of hardware support in commodity processors (e.g. Intel-VT AMD-V).
   However a majority of system-level virtualization projects is guided by the server consolidation market. As a result, current virtualization solutions appear to not be suitable for high performance computing (HPC) which is typically based on large-scale systems. On another hand there is significant interest in exploiting virtual machines (VMs) within HPC for a number of other reasons. By virtualizing the machine, one is able to run a variety of operating systems and environments as needed by the applications. Virtualization allows users to isolate workloads, improving security and reliability. It is also possible to support non-native environments and/or legacy operating environments through virtualization. In addition, it is possible to balance work loads, use migration techniques to relocate applications from failing machines, and isolate fault systems for repair.
   This document presents the challenges for the implementation of a system-level virtualization solution for HPC. It also presents a brief survey of the different approaches and techniques to address these challenges.
C1 [Vallee, Geoffroy; Naughton, Thomas; Engelmann, Christian; Ong, Hong; Scott, Stephen L.] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA.
RP Vallee, G (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA.
EM valleegr@ornl.gov; n.iughtont@ornl.gov; engelmannc@ornl.gov;
   hongong@ornl.gov; scottsl@ornl.gov
NR 22
TC 8
Z9 9
U1 0
U2 0
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
SN 1066-6192
BN 978-0-7695-3089-5
J9 EUROMICRO WORKSHOP P
PY 2007
BP 636
EP +
DI 10.1109/PDP.2008.85
PG 3
WC Computer Science, Theory & Methods
SC Computer Science
GA BHM36
UT WOS:000254266500083
ER

PT S
AU Bai, M
   Ahrens, L
   Alekseev, IG
   Alessi, J
   Beebe-Wang, J
   Blaskiewicz, M
   Bravar, A
   Brennan, JM
   Bruno, D
   Bunce, G
   Butler, J
   Cameron, P
   Connolly, R
   Delong, J
   D'Ottavio, T
   Drees, A
   Fischer, W
   Ganetis, G
   Gardner, C
   Glenn, J
   Hayes, T
   Hseuh, HC
   Huang, H
   Ingrassia, P
   Laster, J
   Lee, R
   Luccio, A
   Luo, Y
   MacKay, WW
   Makdisi, Y
   Marr, G
   Marusic, A
   McIntyre, G
   Michnoff, R
   Montag, C
   Morris, J
   Nicoletti, A
   Oddo, P
   Oerter, B
   Piacentino, J
   Pilat, F
   Ptitsyn, V
   Roser, T
   Satogata, T
   Smith, K
   Svinida, DN
   Tepikian, S
   Trbojevic, D
   Tsoupas, N
   Tuozzolo, J
   Wilinski, M
   Zaltsman, A
   Zelenski, A
   Zeno, K
   Zhang, SY
AF Bai, M.
   Ahrens, L.
   Alekseev, I. G.
   Alessi, J.
   Beebe-Wang, J.
   Blaskiewicz, M.
   Bravar, A.
   Brennan, J. M.
   Bruno, D.
   Bunce, G.
   Butler, J.
   Cameron, P.
   Connolly, R.
   Delong, J.
   D'Ottavio, T.
   Drees, A.
   Fischer, W.
   Ganetis, G.
   Gardner, C.
   Glenn, J.
   Hayes, T.
   Hseuh, H-C.
   Huang, H.
   Ingrassia, P.
   Laster, J.
   Lee, R.
   Luccio, A.
   Luo, Y.
   MacKay, W. W.
   Makdisi, Y.
   Marr, G.
   Marusic, A.
   McIntyre, G.
   Michnoff, R.
   Montag, C.
   Morris, J.
   Nicoletti, A.
   Oddo, P.
   Oerter, B.
   Piacentino, J.
   Pilat, F.
   Ptitsyn, V.
   Roser, T.
   Satogata, T.
   Smith, K.
   Svinida, D. N.
   Tepikian, S.
   Trbojevic, D.
   Tsoupas, N.
   Tuozzolo, J.
   Wilinski, M.
   Zaltsman, A.
   Zelenski, A.
   Zeno, K.
   Zhang, S. Y.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Accelerating polarized protons to high energy
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE polarized protons; acceleration; spin
ID SPIN RESONANCES
AB The Relativistic Heavy Ion Collider (RHIC) is designed to provide collisions of high energy polarized protons for the quest of understanding the proton spin structure. Polarized proton collisions atabeam energyof 100 GeV havebeen achieved in RHIC since 2001. Recently, polarized proton beam was accelerated to 250 GeV in RHIC for the first time. UnRe accelerating unpolarized protons, the challenge for achieving high energy polarized protons is to fight the various mechanisms in an accelerator that can lead to partial or total polarization loss due to the interaction of the spin vector with the magnetic fields. We report on the progress of the RHIC polarized proton program. We also present the strategies of how to preserve the polarization through the entire acceleration chain. i.e. a 200 MeV linear accelerator, the Booster, the AGS and RHIC.
C1 [Bai, M.; Ahrens, L.; Alekseev, I. G.; Alessi, J.; Beebe-Wang, J.; Blaskiewicz, M.; Bravar, A.; Brennan, J. M.; Bruno, D.; Bunce, G.; Butler, J.; Cameron, P.; Connolly, R.; Delong, J.; D'Ottavio, T.; Drees, A.; Fischer, W.; Ganetis, G.; Gardner, C.; Glenn, J.; Hayes, T.; Hseuh, H-C.; Huang, H.; Ingrassia, P.; Laster, J.; Lee, R.; Luccio, A.; Luo, Y.; MacKay, W. W.; Makdisi, Y.; Marr, G.; Marusic, A.; McIntyre, G.; Michnoff, R.; Montag, C.; Morris, J.; Nicoletti, A.; Oddo, P.; Oerter, B.; Piacentino, J.; Pilat, F.; Ptitsyn, V.; Roser, T.; Satogata, T.; Smith, K.; Svinida, D. N.; Tepikian, S.; Trbojevic, D.; Tsoupas, N.; Tuozzolo, J.; Wilinski, M.; Zaltsman, A.; Zelenski, A.; Zeno, K.; Zhang, S. Y.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Bai, M (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
RI Alekseev, Igor/J-8070-2014; Svirida, Dmitry/R-4909-2016
OI Alekseev, Igor/0000-0003-3358-9635; 
FU US Department of Energy [DE-AC02-98CH1-886]; RIKEN(Japan)
FX The work was performed under the US Department of Energy Contract No.
   DE-AC02-98CH1-886, and with support of RIKEN(Japan).
NR 29
TC 2
Z9 2
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 22
EP +
PG 3
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300003
ER

PT S
AU Michaels, R
   Carlini, R
AF Michaels, Robert
   Carlini, Roger
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Standard model tests via parity violating electron scattering
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE parity violation; electron scattering; standard model tests
ID POLARIZED ELECTRONS; ASYMMETRIES; MOMENT; CESIUM; WEAK
AB A new generation of parity violating electron scattering measurements at high precision probe for physics beyond Standard Model. The experiments are complementary to high energy experiments and provide indirect access to TeV scale physics via electroweak one-loop effects. Data are presented from the recently completed SLAC experiment E159, which measured the weak charge of the electron Q(weak)(e). The Qweak experiment at Jefferson Lab will measure the weak charge of the proton Q(weak)(p) to an accuracy of +/- 4.3%.
C1 [Michaels, Robert; Carlini, Roger] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
RP Michaels, R (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
NR 28
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 104
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300015
ER

PT S
AU de Jager, K
AF de Jager, Kees
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Future spin physics at JLab: 12 GeV and beyond
SO Proceedings of the 17th International Spin Physics Symposium
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
AB The project to upgrade the CEBAF accelerator at Jefferson Lab to 12 GeV is presented. Most of the research program supporting that upgrade, will require a highly polarized beam, as will be illustrated by a few selected examples. To carry out that research program will require an extensively upgraded instrumentation in two of the existing experimental halls and the addition of a fourth hall. The plans for a high-luminosity electron-ion collider are briefly discussed.
C1 Jefferson Lab, Newport News, VA 23606 USA.
RP de Jager, K (reprint author), Jefferson Lab, Newport News, VA 23606 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 174
EP 179
PG 6
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300026
ER

PT S
AU Aronson, S
   Deshpande, A
AF Aronson, Samuel
   Deshpande, Abhay
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI The future of spin physics at BNL
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE RHIC spin; polarized gluons; Siberian snakes; eRHIC; polarized protons
AB The Relativistic Heavy Ion Collider (RHIC) at BNL is the world's only polarized proton-proton collider. Collisions at center-of-mass energies up to 500 GeV and beam polarizations approaching 70% (longitudinal or transverse) are provided to two experiments, STAR and PHENIX, at luminosities >= 10(32)/cm(2)/sec. Transverse polarized beam has also been provided to the BRAHMS experiment. Measurements that bear on the important question of the spin content of the nucleon are beginning to appear. Over the next 10 years, as the performance of polarized proton running at RHIC is further developed, the Spin Physics program at RHIC will provide definitive measurements of the contributions to the proton's spin of the gluon, the sea quarks and the orbital motion of the partons in the proton's wave function. We plan to extend the reach of our study of the role of spin in QCD with the development of "eRHIC," which will provide polarized e-p collisions to a new detector.
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
   [Aronson, Samuel] Directors Off, Upton, NY 11973 USA.
   [Deshpande, Abhay] SUNY Stony Brook, Upton, NY 11973 USA.
   [Deshpande, Abhay] CRLKEN BNL Res Ctr, Upton, NY 11973 USA.
RP Aronson, S (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
NR 8
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 184
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300028
ER

PT S
AU Bunce, G
AF Bunce, G.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI The muon g-2 experiment at Brookhaven: Past and future
SO Proceedings of the 17th International Spin Physics Symposium
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE g-2; anomalous magnetic moment; muon; electroweak radiative corrections;
   beyond Standard Model
ID ANOMALOUS MAGNETIC-MOMENT
AB The muon anomalous magnetic moment effectively represents a sum rule of known physics. I will discuss the muon g-2 experiment at Brookhaven, where we have reported our final result in 2004 with an uncertainty of 0.54 parts per million, and have published a detailed description of the experimental methods in April of this year. As of that publication, the Standard Model theory is 2.2 to 2.7 standard deviations below experiment. That is the past. For the future, I will present a proposed improved measurement and discuss the expected improvements in the theoretical prediction for the Standard Model.
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Bunce, G (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 234
EP 239
PG 6
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300037
ER

PT S
AU Vogelsang, W
AF Vogelsang, Werner
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Single-transverse spin Asymmetries
SO Proceedings of the 17th International Spin Physics Symposium
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
ID DEEP-INELASTIC SCATTERING; FINAL-STATE INTERACTIONS; POLARIZED
   PROTON-BEAM; HARD-SCATTERING; ANALYZING POWER; CROSS-SECTIONS;
   DRELL-YAN; LEPTOPRODUCTION; DISTRIBUTIONS; MOMENTUM
AB We give a brief overview of some of the recent results on single-transverse spin asymmetries, highlighting in particular progress in theoretical understanding.
C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Vogelsang, W (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
NR 45
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 319
EP 324
PG 6
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300054
ER

PT S
AU Jackson, HE
AF Jackson, H. E.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Measurement of Delta S in the nucleon from semi-inclusive DIS on
   deuterium
SO Proceedings of the 17th International Spin Physics Symposium
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE strange quarks; nucleon spin; deep-inelastic scattering
ID HERMES POLARIZED HYDROGEN; POLARIMETER; TARGET; RING; HERA
AB The helicity density of the strange quark sea in the nucleon has been extracted from measurements of semi-inclusive polarized deep-inelastic scattering on the deuteron. In the region of measurement the helicity density is zero within experimental error, and in a leading-order analysis the integral of the density over the region x > 0.02 is determined to be 0.006 +/- 0.029(stat.)+/- 0.007(sys.). The first moment of the axial charge over the same region is substantially less than that inferred from hyperon-semi-leptonic decays.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
RP Jackson, HE (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 12
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 379
EP 382
PG 4
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300068
ER

PT S
AU Xu, QH
AF Xu, Qinghua
CA STAR collaboration
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Longitudinal spin transfer in inclusive Lambda and (Lambda)over-bar
   production in polarized proton-proton collisions at root s=200 GeV
SO Proceedings of the 17th International Spin Physics Symposium
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE spin transfer; lambda polarization
AB This contribution reports on a proof-of-principle measurement of the longitudinal spin transfer D-LL in inclusive A and A production in polarized proton-proton collisions at a center of mass energy root s = 200 GeV The data sample consists of about 3 x 10(6) minimum bias events collected in the year 2005 by the STAR experiment at RHIC with proton beam polarizations of up to 50%. The A(A) candidates are reconstructed at mid-rapidity (vertical bar eta vertical bar < 1) using the STAR Time Projection Chamber via the dominant decay channel Lambda -> p pi(-) ((Lambda) over bar -> (p) over bar pi(+) ). Their mean transverse momentum P-r is about 1.3 GeV/c and longitudinal momentum fraction x(F) = 7.5 x 10(-3). The longitudinal Lambda((Lambda) over bar) polarization is determined using a method in which the detector acceptance mostly cancels.
C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Xu, QH (reprint author), Lawrence Berkeley Natl Lab, MS 70R0319, Berkeley, CA 94720 USA.
NR 7
TC 2
Z9 2
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 428
EP 431
PG 4
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300080
ER

PT S
AU Liu, MX
AF Liu, Ming Xiong
CA PHENIX Collaboration
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Double longitudinal spin asymmetry of heavy quark production in the
   polarized p+p collisions at RHIC
SO Proceedings of the 17th International Spin Physics Symposium
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE proton spin; gluon polarization
AB Understanding the contribution of the polarized gluons to the proton spin is one of the key steps toward resolving the nucleon spin crisis. At RHIC energy, heavy quark production is dominated by gluon-gluon interaction, thus measurements of the heavy flavor production in the polarized p+p collisions will allow us to directly access the polarized gluon distribution. During the recent polarized p+p run in 2006, the PHENIX experiment collected 7.5pb(-1) data with average longitudinal beam polarization similar to 60%, and successfully reconstructed about 20K J/psi candidates from the level-2 trigger filtered data. We present the latest results of A(LL) in J/psi production in the longitudinally polarized p+p collisions at root s = 200GeV.
C1 Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA.
RP Liu, MX (reprint author), Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA.
OI Liu, Ming/0000-0002-5992-1221
NR 6
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 494
EP 497
PG 4
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300095
ER

PT S
AU Lin, HW
AF Lin, Huey-Wen
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Nucleon structure from dynamical lattice QCD
SO Proceedings of the 17th International Spin Physics Symposium
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE QCD; lattice; nucleon structure
ID CHIRAL FERMIONS
AB We present lattice QCD numerical calculations of hadronic structure functions and form factors from full-QCD lattices, with a chirally symmetric fermion action, domain-wall fermions, for the sea and valence quarks. The lattice spacing is about 0.12 fin with physical volume approximately (2 fm)(3) for RBC 2-flavor ensembles and (3 fm)(3) for RBC/UKQCD 2+1-flavor dynamical ones. The lightest sea quark mass is about 1/2 the strange quark mass for the former ensembles and 1/4 for the latter ones. Our calculations include: isovector vector- and axial-charge form factors and the first few moments of the polarized and unpolarized structure functions of the nucleon. Nonperturbative renormalization in RI/MOM scheme is applied.
C1 Jefferson Lab, Newport News, VA 23606 USA.
RP Lin, HW (reprint author), Jefferson Lab, 12000 Jefferson Ave, Newport News, VA 23606 USA.
NR 7
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 498
EP 501
PG 4
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300096
ER

PT S
AU Yuan, F
AF Yuan, Feng
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Unique description for single transverse spin Asymmetries in DIS and
   hadronic collisions
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE single transverse-spin asymmetries
ID DEEP-INELASTIC SCATTERING; FINAL-STATE INTERACTIONS; POLARIZED
   PROTON-BEAM; DRELL-YAN PROCESSES; PARTON DISTRIBUTIONS; HARD-SCATTERING;
   ANALYZING POWER; CROSS-SECTIONS; MOMENTUM; GAUGE
AB We derive a unique formula for the single-transverse-spin asymmetry in semi-inclusive hadron production in deep inelastic scattering, valid for all transverse momentum region. Based on this, we further study the integrated asymmetry weighted with transverse-momentum. They can be evaluated in terms of the twist-three quark-gluon correlation functions, which are responsible for the single spin asymmetry in single inclusive hadron production in hadronic collisions. By using the fitted twist-three functions from the hadronic collision data, we find a consistent description for SSAs in deep inelastic scattering. This demonstrates that we have a unique picture for SSAs in these two processes, and shall provide important guidelines for future studies.
C1 Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA.
RP Yuan, F (reprint author), Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Bldg 510A, Upton, NY 11973 USA.
RI Yuan, Feng/N-4175-2013
NR 30
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 525
EP 528
PG 4
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300102
ER

PT S
AU Lee, JH
   Videbaek, F
AF Lee, J. H.
   Videbaek, F.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Single spin Asymmetries of identified hadrons in polarized p plus p at
   root s=62.4 and 200 GeV
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE single spin Asymmetries; BRAHMS; twist-3; sivers
ID BRAHMS EXPERIMENT; FRAGMENTATION
AB Measurements of x(F)-dependent single spin asymmetries of identified charged hadrons, pi(+/-), K-+/-, p, and (p) over bar from transversely polarized proton collisions at root s = 200 and 62.4 GeV at RHIC are presented. The energy and flavor dependent asymmetry measurements bring new insight into the fundamental mechanisms of transverse spin asymmetries and Quantum Chromodynamical description of hadronic structure.
C1 [Lee, J. H.; Videbaek, F.] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Lee, JH (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
FU Division of Nuclear Physics of the Office of Science of the U.S.
   Department of energy [DE-AC02-98-CH10886]
FX We thank Feng Y uan and Umberto D'Alesio for providing us with their
   calculations shown in this contribution. This work is supported by the
   Division of Nuclear Physics of the Office of Science of the U.S.
   Department of energy under contract DE-AC02-98-CH10886.
NR 22
TC 29
Z9 29
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 533
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300104
ER

PT S
AU Bultmann, S
   Chiang, IH
   Chrien, RE
   Drees, A
   Gill, RL
   Guryn, W
   Landgraf, J
   Ljubicic, TA
   Lynn, D
   Pearson, C
   Pile, P
   Rusek, A
   Sakitt, M
   Tepikian, S
   Yip, K
   Chwastowski, J
   Pawlik, B
   Haguenauer, M
   Bogdanov, AA
   Nurushev, SB
   Runtzo, MF
   Strikhanov, MN
   Alekseev, IG
   Kanavets, VP
   Koroleva, LI
   Morozov, BV
   Svirida, DN
   Khodinov, A
   Rijssenbeek, M
   Whitehead, L
   Yeung, S
   De, K
   Guler, N
   Li, J
   Oztuerk, N
   Sandacz, A
AF Bueltmann, S.
   Chiang, I. H.
   Chrien, R. E.
   Drees, A.
   Gill, R. L.
   Guryn, W.
   Landgraf, J.
   Ljubicic, T. A.
   Lynn, D.
   Pearson, C.
   Pile, P.
   Rusek, A.
   Sakitt, M.
   Tepikian, S.
   Yip, K.
   Chwastowski, J.
   Pawlik, B.
   Haguenauer, M.
   Bogdanov, A. A.
   Nurushev, S. B.
   Runtzo, M. F.
   Strikhanov, M. N.
   Alekseev, I. G.
   Kanavets, V. P.
   Koroleva, L. I.
   Morozov, B. V.
   Svirida, D. N.
   Khodinov, A.
   Rijssenbeek, M.
   Whitehead, L.
   Yeung, S.
   De, K.
   Guler, N.
   Li, J.
   Oeztuerk, N.
   Sandacz, A.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI The first measurement of the elastic pp-scattering spin parameters at
   root S=200 GeV
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE polarization; elastic scattering; double spin asymmetries
AB Elastic scattering of polarized protons in the range of very small momentum transferred was studied for the first time at root s = 200 GeV in the experiment pp2pp at RHIC. This article presents the single spin asymmetry AN and the double spin asymmetries A(NN) and A(ss) measured in this experiment.
C1 [Bueltmann, S.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Bultmann, S (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
RI Yip, Kin/D-6860-2013; De, Kaushik/N-1953-2013; Alekseev,
   Igor/J-8070-2014; Strikhanov, Mikhail/P-7393-2014; KHODINOV,
   ALEKSANDR/D-6269-2015; Svirida, Dmitry/R-4909-2016
OI Yip, Kin/0000-0002-8576-4311; De, Kaushik/0000-0002-5647-4489; Alekseev,
   Igor/0000-0003-3358-9635; Strikhanov, Mikhail/0000-0003-2586-0405;
   KHODINOV, ALEKSANDR/0000-0003-3551-5808; 
FU US DOE [DE-AC02-98CH10886]; US National Science Foundation; Polish
   Academy of Sciences
FX The research reported here has been performed in part under the US DOE
   contract DE-AC02-98CH10886, and was supported by the US National Science
   Foundation and the Polish Academy of Sciences. The authors are grateful
   for the help of N. Akchurin, D. Alburger, Y. Onel, A. Penzo, and P.
   Schiavon at an early stage of the experimental design and the support of
   the BNL Physics Department, Instrumentation Division, and C-A Department
   at the RHIC-AGS facility.
NR 18
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 677
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300137
ER

PT S
AU Michaels, R
AF Michaels, Robert
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI HAPPEX: Strange quarks in the proton and He-4
SO Proceedings of the 17th International Spin Physics Symposium
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE elastic electron scattering; parity violation; nucleon structure;
   strangeness in nucleon
ID VIOLATING ELECTRON-SCATTERING; MAGNETIC-MOMENT; FORM-FACTORS; NUCLEON;
   CURRENTS; RADIUS
AB HAPPEX results from our 2005 run for the parity-violating asymmetry A (PV) in elastic scattering of 3 GeV electrons off hydrogen and He-4 targets at <theta lab > X 6.0 degrees are presented. The 4He result is A(PV) = (+6.40 +/- 0.23 (stat) +/- 0. 12 (syst)) x 10(-6). The hydrogen result is A(PV) = (- 1.58 +/- 0.12 (stat) +/- 0.04 (syst)) x 10(-6). The asymmetry for hydrogen is a linear combination of G(M)(s) and G(M)(s) the strange quark contributions to the electric and magnetic form factors of die nucleon, respectively, and that for He-4 is a function of G(E)(s) alone. The measurements imply G(E)(s)+ 0.09G(M)(s) = 0.007 +/- 0.011 +/- 0.006 at < Q(2)> = 0.109GeV(2) and G(E)(s) = 0.002 +/- 0.014 +/- 0.007 at < Q(2)> = 0,077GeV(2).
C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
RP Michaels, R (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
NR 33
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 719
EP 724
PG 6
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300147
ER

PT S
AU Chao, A
AF Chao, Alex
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Spin echo and interference in synchrotrons
SO Proceedings of the 17th International Spin Physics Symposium
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
AB Spin dynamics in crossing a single depolarization resonance is a well-studied subject. One well-known example is that of Froissart and Stora in 1960 [1]. More is needed to complete the understanding, particularly of the transient effects, when crossing a single resonance [2]-[4], but question arises what happens if we cross two resonances or cross a single resonance twice. When a resonance is crossed twice, the particle's spin dynamics encounters two additional phenomena. First, the two crossings will interfere with each other, leading to an interference effect Second, there will be a spin echo effect. We discuss these two effects in this report. Two proposals to test these effects experimentally are made at the end.
C1 Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
RP Chao, A (reprint author), Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
NR 12
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 863
EP 869
PG 7
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300180
ER

PT S
AU Ptitsyn, V
   Ahrens, L
   Bai, M
   Beebe-Wang, J
   Blaskiewicz, M
   Bravar, S
   Brown, KA
   Brennan, JM
   Bruno, D
   Bunce, G
   Calaga, R
   Cameron, P
   Connolly, R
   DeLong, J
   D'Ottavio, T
   Drees, A
   Fedotov, A
   Fischer, W
   Ganetis, G
   Hahn, H
   Hayes, T
   Hseuh, HC
   Huang, H
   Ingrassia, P
   Kayran, D
   Kewisch, J
   Lee, R
   Litvinenko, VN
   Luo, Y
   MacKay, WW
   Makdisi, Y
   Malitsky, N
   Marr, G
   Marusic, A
   Michnoff, R
   Montag, C
   Morris, J
   Pilat, F
   Pile, P
   Roser, T
   Russo, T
   Sandberg, J
   Satogata, T
   Schultheiss, C
   Tepikian, S
   Trbojevic, D
   Tsoupas, N
   Tuozzolo, J
   Zaltsman, A
   Zeno, K
   Zelenski, A
   Zhang, SY
AF Ptitsyn, V.
   Ahrens, L.
   Bai, M.
   Beebe-Wang, J.
   Blaskiewicz, M.
   Bravar, S.
   Brown, K. A.
   Brennan, J. M.
   Bruno, D.
   Bunce, G.
   Calaga, R.
   Cameron, P.
   Connolly, R.
   DeLong, J.
   D'Ottavio, T.
   Drees, A.
   Fedotov, A.
   Fischer, W.
   Ganetis, G.
   Hahn, H.
   Hayes, T.
   Hseuh, H-C.
   Huang, H.
   Ingrassia, P.
   Kayran, D.
   Kewisch, J.
   Lee, R.
   Litvinenko, V. N.
   Luo, Y.
   MacKay, W. W.
   Makdisi, Y.
   Malitsky, N.
   Marr, G.
   Marusic, A.
   Michnoff, R.
   Montag, C.
   Morris, J.
   Pilat, F.
   Pile, P.
   Roser, T.
   Russo, T.
   Sandberg, J.
   Satogata, T.
   Schultheiss, C.
   Tepikian, S.
   Trbojevic, D.
   Tsoupas, N.
   Tuozzolo, J.
   Zaltsman, A.
   Zeno, K.
   Zelenski, A.
   Zhang, S. Y.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI RHIC performance with polarized protons in Run-6
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE polarized protons; acceleration; luminosity
AB The RHIC polarized proton run (Run-6) in 2006 started on February 1 and continued for 21 weeks. The Run-6 included the machine operation at different beam energies and with different orientation of beam polarization at the collision points. The machine operation at 100GeV and 31.2 GeV provided physics data of polarized proton collisions to the STAR, PHENIX and BRAHMS experiments. Record levels of the luminosity (up to 3.5 10(31) cm(-2) s(-1) peak) and proton beam polarization (up to 65%) were achieved during the 100GeV operation. The beam polarization was preserved during the acceleration by using Siberian Snakes, based on helical magnets. The polarization orientation at STAR and PHENIX experiments was controlled with helical spin rotators. During different stages of the run the physics data were provided with longitudinal, vertical and horizontal orientations of the beam polarization at the collision points. Total luminosity integrals of 45 pb(-1) at 100 GeV and 0.35 pb(-1) at 31.2 GeV were delivered to the experiments.
C1 [Ptitsyn, V.; Ahrens, L.; Bai, M.; Beebe-Wang, J.; Blaskiewicz, M.; Bravar, S.; Brown, K. A.; Brennan, J. M.; Bruno, D.; Bunce, G.; Calaga, R.; Cameron, P.; Connolly, R.; DeLong, J.; D'Ottavio, T.; Drees, A.; Fedotov, A.; Fischer, W.; Ganetis, G.; Hahn, H.; Hayes, T.; Hseuh, H-C.; Huang, H.; Ingrassia, P.; Kayran, D.; Kewisch, J.; Lee, R.; Litvinenko, V. N.; Luo, Y.; MacKay, W. W.; Makdisi, Y.; Malitsky, N.; Marr, G.; Marusic, A.; Michnoff, R.; Montag, C.; Morris, J.; Pilat, F.; Pile, P.; Roser, T.; Russo, T.; Sandberg, J.; Satogata, T.; Schultheiss, C.; Tepikian, S.; Trbojevic, D.; Tsoupas, N.; Tuozzolo, J.; Zaltsman, A.; Zeno, K.; Zelenski, A.; Zhang, S. Y.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Ptitsyn, V (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
RI Kayran, Dmitry/E-1876-2013
OI Kayran, Dmitry/0000-0002-1156-4384
FU US DOE [DE-AC02-98CH1-886]; Renaissance Technologies Corp. (USA)
FX Work performed under US DOE contract DE-AC02-98CH1-886, and with support
   of Renaissance Technologies Corp. (USA)
NR 2
TC 0
Z9 0
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 896
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300187
ER

PT S
AU Huang, H
   Ahrens, LA
   Bai, M
   Bravar, A
   Brown, K
   Courant, ED
   Gardner, C
   Glenn, JW
   Lin, E
   Luccio, AU
   Mackay, WW
   Okamura, M
   Ptitsyn, V
   Roser, T
   Takano, J
   Tepikian, S
   Tsoupas, N
   Wood, J
   Yip, K
   Zelenski, A
   Zeno, K
AF Huang, H.
   Ahrens, L. A.
   Bai, M.
   Bravar, A.
   Brown, K.
   Courant, E. D.
   Gardner, C.
   Glenn, J. W.
   Lin, E.
   Luccio, A. U.
   Mackay, W. W.
   Okamura, M.
   Ptitsyn, V.
   Roser, T.
   Takano, J.
   Tepikian, S.
   Tsoupas, N.
   Wood, J.
   Yip, K.
   Zelenski, A.
   Zeno, K.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Polarized proton acceleration in the AGS with two helical partial snakes
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE polarized protons; acceleration; spin
AB Acceleration of polarized protons in the energy range of 5 to 25 GeV is particularly difficult: the depolarizing resonances are strong enough to cause significant depolarization but full Siberian snakes cause intolerably large orbit excursions and are not feasible in the AGS since straight sections are too short. Recently, two helical partial snakes have been built and installed in the AGS. With careful setup of optics at injection and along the ramp, this combination can eliminate the intrinsic and imperfection depolarizing resonances encountered during acceleration. This paper presents the accelerator setup and preliminary results.
C1 [Huang, H.; Ahrens, L. A.; Bai, M.; Bravar, A.; Brown, K.; Courant, E. D.; Gardner, C.; Glenn, J. W.; Luccio, A. U.; Mackay, W. W.; Ptitsyn, V.; Roser, T.; Tepikian, S.; Tsoupas, N.; Wood, J.; Yip, K.; Zelenski, A.; Zeno, K.] Brookhaven Natl Lab, Upton, NY 11973 USA.
   [Okamura, M.; Takano, J.] RIKEN, Radiat Lab, Saitama, Japan.
   Indiana Univ, Bloomington, IN 47405 USA.
RP Huang, H (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
RI Yip, Kin/D-6860-2013
OI Yip, Kin/0000-0002-8576-4311
NR 9
TC 0
Z9 0
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 900
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300188
ER

PT S
AU Nakagawa, I
   Alekseev, I
   Bravar, A
   Bunce, G
   Dhawan, S
   Eyser, KO
   Gill, R
   Haeberli, W
   Huang, H
   Jinnouchi, O
   Makdisi, Y
   Nass, A
   Okada, H
   Stephenson, E
   Svirida, D
   Wise, T
   Wood, J
   Zelenski, A
AF Nakagawa, I.
   Alekseev, I.
   Bravar, A.
   Bunce, G.
   Dhawan, S.
   Eyser, K. O.
   Gill, R.
   Haeberli, W.
   Huang, H.
   Jinnouchi, O.
   Makdisi, Y.
   Nass, A.
   Okada, H.
   Stephenson, E.
   Svirida, D.
   Wise, T.
   Wood, J.
   Zelenski, A.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Polarization measurements of RHIC-pp RUN05 using CNI pC-Polarimeter
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE spin; RHIC; polarimeter; CNI
ID POWER
AB The 2005 run (RUN05) was the first extended operation of the polarized RHIC-pp program. Throughout 3 months of running, polarization measurements were regularly executed every 2 similar to 3 hours during the beams at storage energy 100GeV using RHIC pC-polarimeters. These measurements were performed under different beam conditions, i.e., intensity, emittance, backgrounds, cumulated radiation damage on detectors and so on. The stability of measurements under these various conditions is a major concern and is discussed in detail.
C1 [Nakagawa, I.; Okada, H.] RIKEN, Wako, Saitama 3510198, Japan.
   [Nakagawa, I.; Bunce, G.] Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA.
   [Alekseev, I.; Svirida, D.] Inst Theoret & Expt Phys, Moscow 117259, Russia.
   [Bravar, A.] Univ Geneva, CH-1205 Geneva, Switzerland.
   [Bravar, A.; Bunce, G.; Gill, R.; Huang, H.; Makdisi, Y.; Wood, J.; Zelenski, A.] Brookhaven Natl Lab, Upton, NY 11973 USA.
   [Dhawan, S.] Yale Univ, New Haven, CT 06520 USA.
   [Eyser, K. O.] Univ Calif Riverside, Riverside, CA 92951 USA.
   [Haeberli, W.; Wise, T.] Univ Wisconsin, Madison, WI 53706 USA.
   [Jinnouchi, O.] KEK, Tsukuba, Ibaraki 3050801, Japan.
   [Nass, A.] Univ Erlangen Nurnberg, D-91058 Erlangen, Germany.
   [Okada, H.] Kyoto Univ, Kyoto 6068502, Japan.
   [Stephenson, E.] Indiana Univ, Bloomington, IN 47408 USA.
RP Nakagawa, I (reprint author), RIKEN, Wako, Saitama 3510198, Japan.
RI Alekseev, Igor/J-8070-2014; Svirida, Dmitry/R-4909-2016
OI Alekseev, Igor/0000-0003-3358-9635; 
NR 2
TC 7
Z9 7
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 912
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300191
ER

PT S
AU Eyser, KO
   Alekseev, I
   Bravar, A
   Bunce, G
   Dhawan, S
   Gill, R
   Haeberli, W
   Huang, H
   Jinnouchi, O
   Makdisi, Y
   Nakagawa, I
   Nass, A
   Okada, H
   Stephenson, E
   Svirida, D
   Wise, T
   Wood, J
   Zelenski, A
AF Eyser, K. O.
   Alekseev, I.
   Bravar, A.
   Bunce, G.
   Dhawan, S.
   Gill, R.
   Haeberli, W.
   Huang, H.
   Jinnouchi, O.
   Makdisi, Y.
   Nakagawa, I.
   Nass, A.
   Okada, H.
   Stephenson, E.
   Svirida, D.
   Wise, T.
   Wood, J.
   Zelenski, A.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Absolute polarization measurements at RHIC in the Coulomb nuclear
   interference region
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE elastic scattering; polarimeter; polarized protons
ID HYDROGEN; TARGET
AB The Relativistic Heavy Ion Collider at Brookhaven National Laboratory provides polarized proton beams for the investigation of the nucleon spin structure. For polarimetry, carbon-proton and proton-proton scattering is used in the Coulomb nuclear interference region at small momentum transfer (-t). Fast polarization measurements of each beam are carried out with carbon fiber targets at several times during an accelerator store. A polarized hydrogen gas jet target is needed for absolute normalization over multiple stores, while the target polarization is constantly monitored in a Breit-Rabi polarimeter. In 2005, the jet polarimeter has been used with both RHIC beams. We present results from the jet polarimeter including a detailed analysis of background contributions to asymmetries and to the beam polarization.
C1 [Eyser, K. O.] Univ Calif Riverside, Riverside, CA 92521 USA.
   [Alekseev, I.; Svirida, D.] Inst Theoret & Expt Phys, Moscow 117259, Russia.
   [Bravar, A.] Univ Geneva, CH-1205 Geneva, Switzerland.
   [Bunce, G.; Gill, R.; Huang, H.; Makdisi, Y.; Wood, J.; Zelenski, A.] Brookhaven Natl Lab, Upton, NY 11973 USA.
   [Bunce, G.; Nakagawa, I.; Nass, A.] RIKEN BNL Res Ctr, Upton, NY 11973 USA.
   [Dhawan, S.] Yale Univ, New Haven, CT 06520 USA.
   [Haeberli, W.; Wise, T.] Univ Wisconsin, Madison, WI 53706 USA.
   [Jinnouchi, O.] KEK, Tsukuba, Ibaraki 3050801, Japan.
   [Nakagawa, I.; Okada, H.] RIKEN, Wako, Saitama 3510198, Japan.
   [Nass, A.] Univ Erlangen Nurnberg, D-91058 Erlangen, Germany.
   [Okada, H.] Kyoto Univ, Kyoto 6068502, Japan.
   [Stephenson, E.] Indiana Univ, Cyclotron Facil, Bloomington, IN 47408 USA.
RP Eyser, KO (reprint author), Univ Calif Riverside, Riverside, CA 92521 USA.
RI Alekseev, Igor/J-8070-2014; Svirida, Dmitry/R-4909-2016
OI Alekseev, Igor/0000-0003-3358-9635; 
NR 3
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 916
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300192
ER

PT S
AU Luccio, AU
   Bai, M
   Roser, T
   Molodojentsev, A
   Ohmori, C
   Sato, H
   Hatanaka, K
AF Luccio, A. U.
   Bai, M.
   Roser, T.
   Molodojentsev, A.
   Ohmori, C.
   Sato, H.
   Hatanaka, K.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI A study of polarized proton acceleration in J-PARC
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE polarized protons; acceleration; spin
AB We have studied the feasibility of polarized proton acceleration in rhe J-PARC accelerator facility, consisting of a 400 MeV linac, a 3 GeV rapid cycling synchrotron (RCS) and a 50 GeV synchrotron (MR). We show how the polarization of the beam can be preserved using an rf dipole in the RCS and two superconductve partial helical Siberian snakes in the MR. The lattice of the MR will be modified with the addition of quadrupoles to compensate for the focusing properties of the snakes.
C1 [Luccio, A. U.; Bai, M.; Roser, T.] Brookhaven Natl Lab, Upton, NY 11973 USA.
   [Molodojentsev, A.; Ohmori, C.; Sato, H.] High Energy Accelerat Res Organizat, Tsukuba, Ibaraki, Japan.
   [Hatanaka, K.] Osaka Univ, Res Ctr Nucl Phys, Osaka, Japan.
RP Luccio, AU (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
NR 6
TC 0
Z9 0
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 944
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300198
ER

PT S
AU Makdisi, Y
   Alekseev, I
   Bellavia, S
   Bravar, A
   Bunce, G
   Chapman, MA
   Dhawan, S
   Eyser, KO
   Gasner, D
   Gill, R
   Haeberli, W
   Li, Z
   Khodinov, A
   Kponou, A
   Meng, W
   Nass, A
   Okada, H
   Saito, N
   Resica, S
   Stephenson, E
   Svirida, D
   Trbojevic, D
   Tsang, T
   Wise, T
   Zelenski, A
   Zubets, V
AF Makdisi, Y.
   Alekseev, I.
   Bellavia, S.
   Bravar, A.
   Bunce, G.
   Chapman, M. A.
   Dhawan, S.
   Eyser, K. O.
   Gasner, D.
   Gill, R.
   Haeberli, W.
   Li, Z.
   Khodinov, A.
   Kponou, A.
   Meng, W.
   Nass, A.
   Okada, H.
   Saito, N.
   Resica, S.
   Stephenson, E.
   Svirida, D.
   Trbojevic, D.
   Tsang, T.
   Wise, T.
   Zelenski, A.
   Zubets, V.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Status and operational experience with the polarized hydrogen jet at
   RHIC
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE polarized hydrogen; jet; polarimeter
AB The polarized hydrogen Jet target at RHIC continues its mission to provide absolute calibration for the polarized proton beam polarimeters at RHIC. Data were collected at incoming beam momenta of 100, 24, and 32 GeV/c respectively. The statistical and systematic accuracy of the jet data at 100 GeV/c achieved its goal of statistical accuracy of measuring the beam polarization to 3% in Run 5. Attempts at reducing the jet systematic uncertainty due to molecular hydrogen are also described.
C1 [Makdisi, Y.; Bellavia, S.; Bravar, A.; Bunce, G.; Gasner, D.; Gill, R.; Li, Z.; Khodinov, A.; Kponou, A.; Meng, W.; Nass, A.; Resica, S.; Trbojevic, D.; Tsang, T.; Zelenski, A.; Zubets, V.] Brookhaven Natl Lab, Upton, NY 11973 USA.
   [Chapman, M. A.; Haeberli, W.; Wise, T.] Univ Wisconsin, Madison, WI 53706 USA.
   [Bunce, G.] RIKEN, BNL Res Ctr, Upton, NY 11973 USA.
   [Alekseev, I.; Svirida, D.] Inst Theoret & Expt Phys, Moscow 117259, Russia.
   [Okada, H.; Saito, N.] Kyoto Univ, Kyoto, Japan.
   [Dhawan, S.] Yale Univ, New Haven, CT 06520 USA.
   [Stephenson, E.] Indiana Univ, Bloomington, IN 47408 USA.
   [Eyser, K. O.] Univ Calif Riverside, Riverside, CA 92521 USA.
RP Makdisi, Y (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
RI Alekseev, Igor/J-8070-2014; KHODINOV, ALEKSANDR/D-6269-2015; Svirida,
   Dmitry/R-4909-2016
OI Alekseev, Igor/0000-0003-3358-9635; KHODINOV,
   ALEKSANDR/0000-0003-3551-5808; 
FU Department of Energy [DE-AC02-98CH10886]; RIKEN BNL Research Center
FX Work supported by the Department of Energy Contract no.
   DE-AC02-98CH10886 and the RIKEN BNL Research Center.
NR 3
TC 8
Z9 8
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 975
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300204
ER

PT S
AU Zelenski, A
AF Zelenski, Anatoli
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Optically-Pumped Polarized Electron, H- (proton), deutron and He-3(++)
   ion source development at BNL
SO Proceedings of the 17th International Spin Physics Symposium
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
AB New 3 techniques for production of polarized electron, H- (proton), D- (deuteron) and He-3(++) ion beams based on optical pumping polarization method are discussed. Feasibility studies of these polarization techniques are in progress at BNL.
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Zelenski, A (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 987
EP 991
PG 5
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300207
ER

PT S
AU Honig, A
   Sandorfi, A
AF Honig, Arnold
   Sandorfi, Andrew
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Experimental test in a tokamak of fusion with spin-polarized D and 3He
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE nuclear fusion; polarized D; polarized He-3
ID SOLID HD; TARGETS; NUCLEI; PROTON
AB An experiment to test polarization retention of highly polarized D and 3 He fusion fuels prior to their fusion reactions in a tTokamak is in preparation. The fusion reaction rate with 100% vector polarized reactants is expected from simple theory to increase by a factor of 1.5. With presently available polarizations, fusion reaction enhancements of similar to 15% are achievable and of significant interest, while several avenues for obtaining higher polarizations are open. The potential for survival of initial fusion fuel polarizations at similar to 10(8) K plasma core temperatures (similar to 5KeV) throughout the time interval preceding fusion bum was addressed in a seminal paper in 1982(1). While the positive conclusion from those calculations suggests that reaction enhancements are indeed feasible, this crucial factor has never been tested in a high temperature plasma core because of difficulties in preparation and injection of sufficiently polarized fusion fuels into a high temperature reactorfusion plasma. Our solution to these problems employs a new source of highly polarized D in the form of solid HD which has been developed and used in our laboratories(2,3). Solid HD is compatible with fusion physics in view of its simplicity of elemental composition and very long (weeks) relaxation times at 4K temperature, allowing efficient polarization-preserving cold-transfer operations. Containment and polarization of the HD within polymer capsules, similar to those used in inertial confinement fusion (ICF), is an innovation which simplifies the cold-transfer of polarized fuel from the dilution refrigerator polarization-production apparatus to other liquid helium temperature cryostats, for storage, transport and placement into the barrel of a cryogenic pellet gun for firing at high velocity into the reactor. The other polarized fuel partner, He-3, has been prepared as a polarized gas(5) for applications including high-energy polarized targets and magnetic resonance imaging (MRI) scans. It will be introduced into the reactor by loading at high pressure into a thick-walled ICF-type polymer shell for injection into the plasma core with a room temperature injection gun. Based on current experience(2,3,5), polarizations of both D and He-3 of similar to 55% are projected, producing a fusion yield increase of about 15%. A collaboration is being developed for implementing this experiment at the DIII-D Ttokamak experiment at San Diego, operated by General Atomics for the U.S. Department of Energy. Calculations indicate a 10% fusion yield increase in the 14.6 MeV protons from the D-He-3 reaction will provide a statistically significant test of polarization retention in the plasma. Injection of the polarized fuels into a He-4 or H-1 plasma improves the discrimination of the effects of polarized fuels. Details of the HD fuel preparation, of the polarization processes, and of the injection into the plasma will beare presented. If the expected fusion reaction yield increase indicative of polarization retention is detected, a route to significantly improved second generation D-He-3 fusion would be established, as well as confidence to undertake the more difficult polarization of tritium, which would offer important cost savings and improved prospects of ignition in the ITER program.
C1 [Honig, Arnold; Sandorfi, Andrew] Syracuse Univ, Dept Phys, Syracuse, NY 13244 USA.
   [Honig, Arnold; Sandorfi, Andrew] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Honig, A (reprint author), Syracuse Univ, Dept Phys, Syracuse, NY 13244 USA.
NR 17
TC 4
Z9 4
U1 1
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 1010
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300212
ER

PT S
AU Grames, J
   Poelker, M
   Adderley, P
   Brittian, J
   Clark, J
   Hansknecht, J
   Machle, D
   Stutzman, ML
   Surles-Law, K
AF Grames, J.
   Poelker, M.
   Adderley, P.
   Brittian, J.
   Clark, J.
   Hansknecht, J.
   Machle, D.
   Stutzman, M. L.
   Surles-Law, K.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Measurements of photocathode operational lifetime at beam currents up to
   10 mA using an improved DC high voltage GaAs photogun
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE electron sources; polarized beams; particle sources and targets; vacuum
   systems
AB This work extends past research at Jefferson Lab aimed at better appreciating the mechanisms that limit photocathode operational lifetime at high current (> 1 mA). Specifically, the performance of an improved 100 kV DC high voltage load locked photogun will be described. Although difficult to measure directly, we believe the new gun has better vacuum conditions compared to the original gun, as indicated by enhanced photocathode lifetimes exceeding 2000 C using a 1.55 mm diameter drive laser spot at the photocathode. In addition, the dependence of the lifetime on the laser spot size at the photocathode was measured and a charge density lifetime exceeding 10(6) c/cm(2) was measured with a 0.32 mm laser spot diameter.
C1 [Grames, J.; Poelker, M.; Adderley, P.; Brittian, J.; Clark, J.; Hansknecht, J.; Machle, D.; Stutzman, M. L.; Surles-Law, K.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
RP Grames, J (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
NR 9
TC 1
Z9 2
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 1037
EP +
PG 3
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300216
ER

PT S
AU Maruyarna, T
   Brachmann, A
   Clendenin, JE
   Garwin, EL
   Loakeimidi, K
   Kirby, RE
   Prepost, R
   Moy, AM
AF Maruyarna, T.
   Brachmann, A.
   Clendenin, J. E.
   Garwin, E. L.
   Loakeimidi, K.
   Kirby, R. E.
   Prepost, R.
   Moy, A. M.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Polarization possibilities of small spin-orbit interaction in
   strained-superlattice photocathodes
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE polarized electrons; superlattice
ID RELAXATION
AB Strained-superlattice photocathodes based on InGaP/GaAs were investigated. The photocathode performance is found highly dependent on the superlattice parameters. The electron confinement energy in superlattice appears important.
C1 [Maruyarna, T.; Brachmann, A.; Clendenin, J. E.; Garwin, E. L.; Loakeimidi, K.; Kirby, R. E.] Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
   [Prepost, R.] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
   [Moy, A. M.] SVT Associates, Eden Prairie, MN 55344 USA.
RP Maruyarna, T (reprint author), Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
FU US Department of Energy [DE-AC02- 76SF00515, DE-AC02-76ER0088 (WI)]
FX Work supported in part by US Department of Energy under contract
   DE-AC02- 76SF00515 (SLAC) and DE-AC02-76ER0088 (WI)
NR 6
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 1045
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300217
ER

PT S
AU Marnaev, YA
   Gerchikov, LG
   Yashin, YP
   Kuz'michev, V
   Vasiliev, D
   Maruyama, T
   Clendenin, JE
   Ustinov, VM
   Zhukov, AE
AF Marnaev, Yu. A.
   Gerchikov, L. G.
   Yashin, Yu. P.
   Kuz'michev, V.
   Vasiliev, D.
   Maruyama, T.
   Clendenin, J. E.
   Ustinov, V. M.
   Zhukov, A. E.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Improved superlattices for spin-polarized electron sources
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE superlattice; minimum conduction-band offsets; photoemission
ID EMISSION
AB Photoemission of polarized electrons from hetero structures based on InAlGaAs/GaAs superlattices with minimum conduction-band offsets is investigated. The comparison of the excitation energy dependence of the photoemission polarization degree with the calculated spectra makes it possible to determine the polarization losses at different stages of the photoemission. A maximum polarization of P = 91 % and a quantum efficiency of QE=0.5% are close to the best results obtained for photocathodes that are based on strained semiconductor superlattices.
C1 [Marnaev, Yu. A.; Gerchikov, L. G.; Yashin, Yu. P.; Kuz'michev, V.; Vasiliev, D.] State Polytech Univ, Politeknicheskaya Str 29, St Petersburg 195251, Russia.
   [Maruyama, T.; Clendenin, J. E.] Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
   [Ustinov, V. M.; Zhukov, A. E.] RAS, Ioffe Physico Tech Inst, St Petersburg 194021, Russia.
RP Marnaev, YA (reprint author), State Polytech Univ, Politeknicheskaya Str 29, St Petersburg 195251, Russia.
RI Zhukov, Alexey/A-5523-2014
OI Zhukov, Alexey/0000-0002-4579-0718
FU U.S. Department of Energy [DE-AC02-76SF00515]
FX Work supported in part by U.S. Department of Energy under contract
   DE-AC02-76SF00515
NR 7
TC 0
Z9 0
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 1049
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300218
ER

PT S
AU Ioakeimidi, K
   Brachmann, A
   Clendenin, JE
   Garwin, EL
   Kirby, RE
   Maruyama, T
   Prescott, CY
   Prepost, R
   Mulhollan, GA
   Bierman, JC
   Gradinaru, SA
AF Ioakeimidi, K.
   Brachmann, A.
   Clendenin, J. E.
   Garwin, E. L.
   Kirby, R. E.
   Maruyama, T.
   Prescott, C. Y.
   Prepost, R.
   Mulhollan, G. A.
   Bierman, J. C.
   Gradinaru, S. A.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Transport mechanisms in polarized semiconductor photocathodes
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE polarized electron; drift spin
AB We investigated the effect of an accelerating field on the spin polarization of photogenerated electrons in a 100nm thick GaAs based photocathode active region. By decreasing the transport time of the electrons and the number of scattering events that cause depolarization, we expected to increase the polarization as was indicated by Monte Carlo simulations of the scattering and transport time statistics of the electrons.
   A tungsten (W) grid was deposited on the cathode surface to provide a uniform voltage distribution across the cathode surface. The metal grid formed a Schottky contact with the semiconductor surface. The bias voltage was primarily dropped at the metal semiconductor interface region, which is the cathode active region. For positive surface bias, the accelerating voltage not only increased the polarization, but it also enhanced the quantum efficiency of the photocathode. Preliminary results verify the bias effect on both quantum efficiency and polarization by a factor of 1.8 and 1% respectively.
C1 [Ioakeimidi, K.; Brachmann, A.; Clendenin, J. E.; Garwin, E. L.; Kirby, R. E.; Maruyama, T.; Prescott, C. Y.] Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
   [Prepost, R.] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
   [Mulhollan, G. A.; Bierman, J. C.] Saxet Surface Sci, Austin, TX 78744 USA.
   [Gradinaru, S. A.] Magma Design, Santa Clara, CA USA.
RP Ioakeimidi, K (reprint author), Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
FU Department of Energy Small Business Innovation Research [DOE
   DE-FG02-04ER86231]; Department of Energy [DE-AC02-76SF00515]
FX This work was supported by Department of Energy Small Business
   Innovation Research Grant No. DOE DE-FG02-04ER86231 and the Department
   of Energy contract DE-AC02-76SF00515
NR 3
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 1061
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300220
ER

PT S
AU Clendenin, JE
   Brachmann, A
   Ioakelmidi, K
   Kirby, RE
   Maruyarna, T
   Miller, RH
   Wang, JW
   Zhou, F
AF Clendenin, J. E.
   Brachmann, A.
   Ioakelmidi, K.
   Kirby, R. E.
   Maruyarna, T.
   Miller, R. H.
   Wang, J. W.
   Zhou, F.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Low emittance guns for the ILC polarized electron beam
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE electron gun; low emittance; polarized electrons
AB Polarized electron beams generated by DC guns are routinely available at several accelerators including JLAB, Mainz and SLAC. These guns operate with a cathode bias on the order of -100 kV. To minimize space charge effects, relatively long bunches are generated at the gun and then compressed longitudinally external to the gun just before and during initial acceleration. For linear colliders, this compression is accomplished using a combination of rf bunchers. For the basic design of the International Linear Collider (ILC)(1), a 120 kV DC photocathode gun is used to produce a series of nanosecond bunches that are each compressed by two sub-harmonic bunchers (SHBs) followed by an L-band buncher and capture section. The longitudinal bunching process results in a significantly higher emittance than produced by the gun alone. While high-energy experiments using polarized beams are not generally sensitive to the source emittance, there are several benefits to a lower source emittance including a simpler more efficient injector system and a lower radiation load during transport especially at bends as at the damping ring. For the ILC, the SHBs could be eliminated if the voltage of the gun is raised sufficiently. Simulations using the General Particle Tracer (GPT) package indicate that a cathode bias voltage of >= 200 kV should allow both SHBs to be operated at 433 or even 650 Mflz, while >= 500 kV would be required to eliminate the SHBs altogether. Simulations can be used to determine the minimum emittance possible if the injector is designed for a given increased voltage. A possible alternative to the DC gun is an rf gun. Emittance compensation, routinely used with rf guns, is discussed for higher-voltage DC guns.
C1 [Clendenin, J. E.; Brachmann, A.; Ioakelmidi, K.; Kirby, R. E.; Maruyarna, T.; Miller, R. H.; Wang, J. W.; Zhou, F.] Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
RP Clendenin, JE (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
FU Department of Energy [DE-AC02-76SF00515]
FX Work supported by Department of Energy contract DE-AC02-76SF00515.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 1067
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300221
ER

PT S
AU Roberts, JS
   Yashin, YP
   Mamaev, YA
   Gerchikov, LG
   Martiyama, T
   Luh, DA
   Clendenin, JE
AF Roberts, J. S.
   Yashin, Yu. P.
   Mamaev, Yu. A.
   Gerchikov, L. G.
   Martiyama, T.
   Luh, D. -A.
   Clendenin, J. E.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI Enhancement of spin-polarized electron emission from
   Strain-CompensatedAlInGaAs-GaAsP superlattices
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE enhancement; quantum efficiency; Fabry-Perot resonator
AB Resonance enhancement of the quantum efficiency of new polarized electron photocathodes based on a short-period strain-compensated AlInGaAs/GaAsP superlattice structure is reported. The superlattice is a part of an integrated Fabry-Perot optical cavity. We demonstrate that the Fabry-Perot resonator enhances the quantum efficiency by up to a factor 10 in the wavelength region of the main polarization maximum. The high structural quality implied by these results points to the very promising application of these photocathodes for spin-polarized electron sources.
C1 [Roberts, J. S.] Univ Sheffield, Dept Elect Engn, Mappin St, Sheffield S1 3JD, S Yorkshire, England.
   [Yashin, Yu. P.; Mamaev, Yu. A.; Gerchikov, L. G.] State Polytech Univ, St Petersburg 195251, Russia.
   [Martiyama, T.; Luh, D. -A.; Clendenin, J. E.] Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
RP Roberts, JS (reprint author), Univ Sheffield, Dept Elect Engn, Mappin St, Sheffield S1 3JD, S Yorkshire, England.
FU RFBR [04-02-16038]; NATO [PST.CLG.979966]; U.S. Department of Energy
   [DEAC02-76SF00515]; Swiss National Science Foundation [SNS
   FIB7420-111116]
FX This work was supported by RFBR under grant 04-02-16038, NATO under
   grant PST.CLG.979966, the U.S. Department of Energy under contract
   DEAC02-76SF00515 and Swiss National Science Foundation under grant SNS
   FIB7420-111116 .
NR 4
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 1077
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300223
ER

PT S
AU Brachmann, A
   Clendenin, JE
   Garwin, EL
   Ioakeimidi, K
   Kirby, RE
   Maruyama, T
   Prescott, CY
   Sheppard, J
   Turner, J
   Zhou, F
AF Brachmann, A.
   Clendenin, J. E.
   Garwin, E. L.
   Ioakeimidi, K.
   Kirby, R. E.
   Maruyama, T.
   Prescott, C. Y.
   Sheppard, J.
   Turner, J.
   Zhou, F.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI The polarized electron source for the international collider (ILC)
   project
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE polarized electron source; international linear collider
AB The ILC project will be the next large high energy physics tool that will use polarized electrons (and positrons). For this machine spin physics will play an important role. The polarized electron source design is based on electron injectors built for the Stanford Linear Collider (polarized) and Tesla Test Facility (un-polarized). The ILC polarized electron source will provide a 5GeV spin polarized electron beam for injection into the ILC damping ring. Although most ILC machine parameters have been achieved by the SLC or TTF source, features of both must be integrated into one design. The bunch train structure presents unique challenges to the source laser drive system. A suitable laser system has not yet been demonstrated and is part of the ongoing R&D program for ILC at SLAC. Furthermore, ILC injector R&D incorporates photocathode development increasing available polarization, and improving operational properties in gun vacuum systems. Another important area of research and development is advancing the design of DC and RF electron gun technology for polarized sources. This presentation presents the current status of the design and outlines aspects of the relevant R&D program carried out within the ILC community.
C1 [Brachmann, A.; Clendenin, J. E.; Garwin, E. L.; Ioakeimidi, K.; Kirby, R. E.; Maruyama, T.; Prescott, C. Y.; Sheppard, J.; Turner, J.; Zhou, F.] Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
RP Brachmann, A (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
FU Department of Energy [DE-AC02-76SF00515]
FX This work is supported by Department of Energy contract
   DE-AC02-76SF00515
NR 6
TC 2
Z9 2
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 1091
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300226
ER

PT S
AU Mikhailichenko, A
   Alexander, G
   Batygin, Y
   Berridge, S
   Bharadwaj, V
   Bower, G
   Bugg, W
   Decker, FJ
   Dollan, R
   Efrimenko, Y
   Gharibyan, V
   Hast, C
   Iverson, R
   Kolanoski, H
   Kovermann, J
   Laihem, K
   Lohse, T
   McDonald, KT
   Moortgat-Pick, GA
   Pahl, P
   Pitthan, R
   Poschl, R
   Reinherz-Aronis, E
   Riemann, S
   Schalicke, A
   Schuler, KP
   Schweizer, T
   Scott, D
   Sheppard, JC
   Stahl, A
   Szalata, Z
   Walz, D
   Weidemann, A
AF Mikhailichenko, A.
   Alexander, G.
   Batygin, Y.
   Berridge, S.
   Bharadwaj, V.
   Bower, G.
   Bugg, W.
   Decker, F. -J.
   Dollan, R.
   Efrimenko, Y.
   Gharibyan, V.
   Hast, C.
   Iverson, R.
   Kolanoski, H.
   Kovermann, J.
   Laihem, K.
   Lohse, T.
   McDonald, K. T.
   Moortgat-Pick, G. A.
   Pahl, P.
   Pitthan, R.
   Poeschl, R.
   Reinherz-Aronis, E.
   Riemann, S.
   Schaelicke, A.
   Schueler, K. P.
   Schweizer, T.
   Scott, D.
   Sheppard, J. C.
   Stahl, A.
   Szalata, Z.
   Walz, D.
   Weidemann, A.
BE Imai, K
   Murakami, T
   Tanida, K
   Saito, N
TI The E166 experiment: Undulator-based production of polarized positrons
SO PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 17th International Spin Physics Symposium
CY OCT 02-07, 2006
CL Kyoto, JAPAN
SP Kyoto Univ, Ctr Diversity & Universal Phys, 21st Cent COE, Int Union Pure & Appl Phys, Int Spin Phys Comm, Kyoto Univ Fdn, Japan World Exposit 70, Commenorat Org
DE ILC; polarized positron source; helical undulator; Compton transmission
   polarimeter
AB A proof-of-principle experiment has been carried out in the Final Focus Test Beam (FFTB) at SLAC to demonstrate production of polarized positrons in a manner suitable for implementation at the ILC. A helical undulator of 2.54 mm period and 1-m length produced circularly polarized photons of first harmonic endpoint energy of 8 MeV when traversed by a 46.6 GeV electron beam. The polarized photons were converted to polarized positrons in a 0.2-radiation-length tungsten target. The polarization of these positrons was measured at several energies, with a peak value of;approximate to, 80% according to a preliminary analysis of the transmission polarimetry of photons obtained on reconversion of the positrons in a second tungsten target.
C1 [Kovermann, J.; Schueler, K. P.; Stahl, A.] Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
   [Mikhailichenko, A.; Batygin, Y.] Cornell Univ, Ithaca, NY 14853 USA.
   [Scott, D.] CCLRC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England.
   [Moortgat-Pick, G. A.] Univ Durham, Durham DHL 3HP, England.
   [Gharibyan, V.; Pahl, P.; Poeschl, R.; Schueler, K. P.] DESY, D-22607 Hamburg, Germany.
   [Laihem, K.; Riemann, S.; Schaelicke, A.] DESY Zeuthen, D-15738 Zeuthen, Germany.
   [Dollan, R.; Kolanoski, H.; Lohse, T.; Schweizer, T.] Humboldt Univ, D-12489 Berlin, Germany.
   [McDonald, K. T.] Princeton Univ, Princeton, NJ 08544 USA.
   [Batygin, Y.; Decker, F. -J.; Hast, C.; Iverson, R.; Pitthan, R.; Sheppard, J. C.; Szalata, Z.; Walz, D.; Weidemann, A.] SLAC, Menlo Pk, CA 94025 USA.
   [Alexander, G.; Reinherz-Aronis, E.] Tel Aviv Univ, IL-69978 Tel Aviv, Israel.
   [Berridge, S.; Bugg, W.; Efrimenko, Y.] Univ Tennessee, Knoxville, TN 37996 USA.
RP Schuler, KP (reprint author), Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
EM peter.Schuler@desy.de
NR 4
TC 2
Z9 2
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0423-6
J9 AIP CONF PROC
PY 2007
VL 915
BP 1095
EP +
PG 2
WC Physics, Applied; Physics, Atomic, Molecular & Chemical
SC Physics
GA BGK73
UT WOS:000248046300227
ER

PT B
AU Iancu, C
   Strohmaier, E
AF Iancu, Costin
   Strohmaier, Erich
GP ACM
TI Optimizing Communication Overlap for High-Speed Networks
SO PROCEEDINGS OF THE 2007 ACM SIGPLAN SYMPOSIUM ON PRINCIPLES AND PRACTICE
   OF PARALLEL PROGRAMMING PPOPP'07
LA English
DT Proceedings Paper
CT ACM SIGPLAN Symposium on Principles and Practice of Parallel Programming
CY MAR 14-17, 2007
CL San Jose, CA
SP ACM SIGPLAN
DE Communication overlap; Latency hiding; Performance model; High-speed
   networks; Variability; LogGP; LogP
ID COMPUTATION
AB Modern networking hardware supports true non-blocking communication and effective exploitation of this feature can lead to significant application performance improvements. We believe that algorithm design and optimization techniques that hide latency by taking advantage of communication overlap will facilitate obtaining good parallel efficiency and performance on the highly concurrent contemporary systems. Finding an optimal, performance portable implementation when using non-blocking communication primitives is non-trivial and intimidating to many application developers. In this paper we present a methodology for discovering optimal message sizes and schedules for a variety of application scenarios. This is achieved by combining an analytic model that takes into account the variability of performance parameters with system scale and load with heuristics designed to avoid network congestion. We perform experiments to understand network behavior in the presence of overlap and purge the optimization space for any system based oil either resource or implementation constraints. Our approach is able to choose optimal or nearly optimal implementation parameters for a variety of highly non-trivial scenarios and networks with different performance characteristics. Implementations based on parameters chosen by the models are able to hide over 90% of communication overhead in all cases.
C1 [Iancu, Costin; Strohmaier, Erich] Lawrence Berkeley Natl Lab, Berkeley, CA USA.
RP Iancu, C (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA USA.
EM cciancu@lbl.gov; estrohmaier@lbl.gov
NR 23
TC 5
Z9 6
U1 0
U2 0
PU ASSOC COMPUTING MACHINERY
PI NEW YORK
PA 1515 BROADWAY, NEW YORK, NY 10036-9998 USA
BN 978-1-59593-602-8
PY 2007
BP 35
EP 45
DI 10.1145/1229428.1229436
PG 11
WC Computer Science, Software Engineering; Computer Science, Theory &
   Methods
SC Computer Science
GA BJN73
UT WOS:000266870900004
ER

PT B
AU Barrett, RF
   Alam, SR
   Vetter, JS
AF Barrett, Richard F.
   Alam, Sadaf R.
   Vetter, Jeffrey S.
GP ACM
TI Performance Evaluation of the Cray XT3 Configured with Dual Core Opteron
   Processors
SO PROCEEDINGS OF THE 2007 ACM SIGPLAN SYMPOSIUM ON PRINCIPLES AND PRACTICE
   OF PARALLEL PROGRAMMING PPOPP'07
LA English
DT Proceedings Paper
CT ACM SIGPLAN Symposium on Principles and Practice of Parallel Programming
CY MAR 14-17, 2007
CL San Jose, CA
SP ACM SIGPLAN
DE Performance characterization; multi-core processor; AMD Opteron;
   micro-benchmarking; scientific applications
C1 [Barrett, Richard F.; Alam, Sadaf R.; Vetter, Jeffrey S.] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA.
RP Barrett, RF (reprint author), Oak Ridge Natl Lab, 1 Bethel Valley Lane,MS 6173, Oak Ridge, TN 37830 USA.
EM rbarrett@ornl.gov; alamsr@ornl.gov; vetter@ornl.gov
NR 4
TC 0
Z9 0
U1 0
U2 0
PU ASSOC COMPUTING MACHINERY
PI NEW YORK
PA 1515 BROADWAY, NEW YORK, NY 10036-9998 USA
BN 978-1-59593-602-8
PY 2007
BP 148
EP 149
DI 10.1145/1229428.1229460
PG 2
WC Computer Science, Software Engineering; Computer Science, Theory &
   Methods
SC Computer Science
GA BJN73
UT WOS:000266870900022
ER

PT S
AU Gayle, R
   Klingler, KR
   Xavier, PG
AF Gayle, Russell
   Klingler, Kristopher R.
   Xavier, Patrick G.
GP IEEE
TI Lazy reconfiguration forest (LRF) - An approach for motion planning with
   multiple tasks in dynamic environments
SO PROCEEDINGS OF THE 2007 IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND
   AUTOMATION, VOLS 1-10
SE IEEE International Conference on Robotics and Automation ICRA
LA English
DT Proceedings Paper
CT IEEE International Conference on Robotics and Automation
CY APR 10-14, 2007
CL Rome, ITALY
SP IEEE
AB We present a novel algorithm for robot motion planning in dynamic environments. Our approach extends Rapidly-exploring Random Trees (RRTs) in several ways. We assume the need to simultaneously plan and maintain paths for multiple tasks with respect to the current state of a moving robot in a dynamic environment. Our algorithm dynamically maintains a forest of trees by splitting, growing and merging them on the fly to adapt to moving obstacles and robot motion. In order to minimize tree maintenance, we only validate the task paths, rather than the entire forest. The root of the inhabited tree moves with the robot. Dynamic re-planning is integrated with tree and forest maintenance. Coupling the robot motion with the planner enables us to support multiple tasks, for example providing an "escape" path while moving to a goal. The robot is free to move along whichever task path it chooses.
   We highlight the work by showing fast results in simulated environments with moving obstacles.
C1 [Gayle, Russell] Univ N Carolina, Dept Comp Sci, Chapel Hill, NC 27515 USA.
   [Klingler, Kristopher R.; Xavier, Patrick G.] Sandia Natl Labs, Robot & Intelligent Syst, Albuquerque, NM USA.
RP Gayle, R (reprint author), Univ N Carolina, Dept Comp Sci, Chapel Hill, NC 27515 USA.
EM rgayle@cs.unc.edu; Jkrkling@sandia.gov; pgxavie@sandia.gov
FU High Performance Computational Science Graduate Fellowship; United
   States Department of Energy and administered by the Krell Foundation
FX This work was supported by a High Performance Computational Science
   Graduate Fellowship funded by the United States Department of Energy and
   administered by the Krell Foundation.
NR 23
TC 12
Z9 12
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1050-4729
BN 978-1-4244-0601-2
J9 IEEE INT CONF ROBOT
PY 2007
BP 1316
EP +
DI 10.1109/ROBOT.2007.363167
PG 2
WC Automation & Control Systems; Robotics
SC Automation & Control Systems; Robotics
GA BGW23
UT WOS:000250915301052
ER

PT B
AU Olsson, RH
   Fleming, JG
   Wojciechowski, KE
   Baker, MS
   Tuck, MR
AF Olsson, Roy H., III
   Fleming, James G.
   Wojciechowski, Kenneth E.
   Baker, Michael S.
   Tuck, Melanie R.
GP IEEE
TI Post-CMOS compatible aluminum nitride MEMS filters and resonant sensors
SO PROCEEDINGS OF THE 2007 IEEE INTERNATIONAL FREQUENCY CONTROL
   SYMPOSIUM-JOINTLY WITH THE 21ST EUROPEAN FREQUENCY AND TIME FORUM, VOLS
   1-4
LA English
DT Proceedings Paper
CT Joint IEEE International Frequency Control Symposium/21st European
   Frequency and Time Forum
CY MAY 29-JUN 01, 2007
CL Geneva, SWITZERLAND
SP IEEE
ID OSCILLATOR PHASE NOISE
AB This paper reports post-CMOS compatible aluminum nitride (AIN) MEMS resonators, filters, and resonant sensors for the miniaturization of radio-frequency transceivers and sensor systems. Utilizing a resonator with two closely spaced modes, 2(nd) order MEMS filters occupying 0.06 mm(2) have been realized in a single device. Methods for tuning the bandwidth and center frequency of these filters lithographically have been demonstrated. A 0.5% bandwidth, 108.4 MHz dual mode filter has a measured insertion loss of 9.4 dB with 50 Omega termination which can be reduced to 4.7 dB by terminating the filter with 75 Omega. In order to scale MEMS resonators to higher frequencies without increasing the size or impedance, resonators selectively driven at a harmonic determined by interdigitated drive and sense electrodes have been demonstrated reaching frequencies of 796 MHz with impedances of approximately 100 Q and quality factors in excess of 750 in air. In the same process resonant sensors based on AIN double-ended tuning fork (DETF) sensing beams have been demonstrated at 727 kHz with quality factors of 2160. An oscillator based on the DETF sensing beams achieves a phase noise of -81 dBc/Hz at 275 Hz offset from the carrier. A 100 ng mass coupled to a pair of DETF sensors achieves an acceleration sensitivity of 565mG/root Hz for accelerations from 275 to 1100 11z.
C1 [Olsson, Roy H., III; Fleming, James G.; Wojciechowski, Kenneth E.; Baker, Michael S.; Tuck, Melanie R.] Sandia Natl Labs, Adv MEMS Dept, Albuquerque, NM 87185 USA.
RP Olsson, RH (reprint author), Sandia Natl Labs, Adv MEMS Dept, POB 5800, Albuquerque, NM 87185 USA.
EM rholsso@sandia.gov
NR 15
TC 20
Z9 20
U1 0
U2 2
PU IEEE, ELECTRON DEVICES SOC & RELIABILITY GROUP
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-0646-3
PY 2007
BP 412
EP 419
DI 10.1109/FREQ.2007.4319108
PG 8
WC Engineering, Electrical & Electronic; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA BHD30
UT WOS:000252304500092
ER

PT B
AU Wojciechowski, KE
   Olsson, RH
   Baker, MS
   Wittwer, JW
   Smart, KJ
   Reming, JG
   Pohl, KR
AF Wojciechowski, Kenneth E.
   Olsson, Roy H., III
   Baker, Michael S.
   Wittwer, Jonathan W.
   Smart, Kevin J.
   Reming, James G.
   Pohl, Kenneth R.
GP IEEE
TI Low vibration sensitivity MEMS resonators
SO PROCEEDINGS OF THE 2007 IEEE INTERNATIONAL FREQUENCY CONTROL
   SYMPOSIUM-JOINTLY WITH THE 21ST EUROPEAN FREQUENCY AND TIME FORUM, VOLS
   1-4
LA English
DT Proceedings Paper
CT Joint IEEE International Frequency Control Symposium/21st European
   Frequency and Time Forum
CY MAY 29-JUN 01, 2007
CL Geneva, SWITZERLAND
SP IEEE
AB It is well known that the stability of crystal oscillator references is undermined in high-g environments [1,2]. This can result in failure of communications systems relying on the crystal as a frequency reference. Lower vibration sensitivity is theoretically achievable by replacing the crystal with a micro electromechanical (MEMS) resonator. In this paper we present an electrostatically actuated Lame resonator that has vibration sensitivity (0.91 ppb/g) comparable to the best high-g insensitive crystal oscillators.
C1 [Wojciechowski, Kenneth E.; Olsson, Roy H., III; Baker, Michael S.; Wittwer, Jonathan W.; Smart, Kevin J.; Reming, James G.; Pohl, Kenneth R.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Wojciechowski, KE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 6
TC 1
Z9 1
U1 0
U2 0
PU IEEE, ELECTRON DEVICES SOC & RELIABILITY GROUP
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-0646-3
PY 2007
BP 1220
EP 1224
DI 10.1109/FREQ.2007.4319271
PG 5
WC Engineering, Electrical & Electronic; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA BHD30
UT WOS:000252304500255
ER

PT B
AU Lutwak, R
   Rashed, A
   Varghese, M
   Tepolt, G
   Leblanc, J
   Mescher, M
   Serkland, DK
   Peake, GM
AF Lutwak, R.
   Rashed, A.
   Varghese, M.
   Tepolt, G.
   Leblanc, J.
   Mescher, M.
   Serkland, D. K.
   Peake, G. M.
GP IEEE
TI The miniature atomic clock - Pre-production results
SO PROCEEDINGS OF THE 2007 IEEE INTERNATIONAL FREQUENCY CONTROL
   SYMPOSIUM-JOINTLY WITH THE 21ST EUROPEAN FREQUENCY AND TIME FORUM, VOLS
   1-4
LA English
DT Proceedings Paper
CT Joint IEEE International Frequency Control Symposium/21st European
   Frequency and Time Forum
CY MAY 29-JUN 01, 2007
CL Geneva, SWITZERLAND
SP IEEE
ID POLARIZATION CONTROL; RESONANCES; VAPOR
AB The authors have developed a Miniature Atomic Clock (MAC) for applications requiring atomic timing accuracy in portable battery-powered applications. Recently, we have completed a pre-production build of 10 devices in order to evaluate unit-to-unit performance variations and to gain statistical confidence in the performance specifications, environmental sensitivity, and manufacturability.
C1 [Lutwak, R.; Rashed, A.] Symmetricom Technol Realizat Ctr, Beverly, MA 01915 USA.
   [Varghese, M.; Tepolt, G.; Leblanc, J.; Mescher, M.] Charles Stark Draper Lab, Cambridge, MA USA.
   [Serkland, D. K.; Peake, G. M.] Sandia Natl Labs, Albuquerque, NM USA.
RP Lutwak, R (reprint author), Symmetricom Technol Realizat Ctr, Beverly, MA 01915 USA.
EM RLutwak@Symmetricom.com
FU United States Department of Energy's National Nuclear Security
   Administration [DE-AC04-94AL85000]; Defense Advanced Research Products
   Agency [NBCHC020050]
FX Sandia is a multiprogram laboratory operated by Sandia Corporation, a
   Lockheed Martin Company, for the United States Department of Energys
   National Nuclear Security Administration under contract
   DE-AC04-94AL85000. This work is supported by the Defense Advanced
   Research Products Agency, Contract # NBCHC020050.
NR 12
TC 15
Z9 15
U1 0
U2 2
PU IEEE, ELECTRON DEVICES SOC & RELIABILITY GROUP
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-0646-3
PY 2007
BP 1327
EP +
DI 10.1109/FREQ.2007.4319292
PG 2
WC Engineering, Electrical & Electronic; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA BHD30
UT WOS:000252304500276
ER

PT B
AU Macal, CM
   North, MJ
AF Macal, Charles M.
   North, Michael J.
GP IEEE
TI Agent-based modeling and simulation: Desktop ABMS
SO PROCEEDINGS OF THE 2007 WINTER SIMULATION CONFERENCE, VOLS 1-5
LA English
DT Proceedings Paper
CT 2007 Winter Simulation Conference
CY DEC 09-12, 2007
CL Washington, DC
ID MARKETS
AB Agent-based modeling and simulation (ABMS) is a new approach to modeling systems comprised of autonomous, interacting agents. ABMS promises to have far-reaching effects on the way that businesses use computers to support decision-making and researchers use electronic laboratories to support their research. Some have gone so far as to contend that ABMS "is a third way of doing science," in addition to traditional deductive and inductive reasoning (Axelrod 1997b). Computational advances have made possible a growing number of agent-based models across a variety of application domains. Applications range from modeling agent behavior in the stock market, supply chains, and consumer markets, to predicting the spread of epidemics, the threat of bio-warfare, and the factors responsible for the fall of ancient civilizations. This tutorial describes the theoretical and practical foundations of ABMS, identifies toolkits and methods for developing agent models, and illustrates the development of a simple agent-based model of shopper behavior using spreadsheets.
C1 [Macal, Charles M.; North, Michael J.] Argonne Natl Lab, Ctr Complex Adapt Agent Syst Simulat CAS2, Decis & Informat Sci Div, Argonne, IL 60439 USA.
RP Macal, CM (reprint author), Argonne Natl Lab, Ctr Complex Adapt Agent Syst Simulat CAS2, Decis & Informat Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 47
TC 0
Z9 0
U1 0
U2 6
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-1305-8
PY 2007
BP 83
EP 94
PG 12
WC Computer Science, Interdisciplinary Applications; Operations Research &
   Management Science; Mathematics, Applied
SC Computer Science; Operations Research & Management Science; Mathematics
GA BHT16
UT WOS:000256071800009
ER

PT B
AU Kalos, MH
AF Kalos, Malvin H.
GP IEEE
TI Monte Carlo methods in the physical sciences
SO PROCEEDINGS OF THE 2007 WINTER SIMULATION CONFERENCE, VOLS 1-5
LA English
DT Proceedings Paper
CT 2007 Winter Simulation Conference
CY DEC 09-12, 2007
CL Washington, DC
ID MONTE-CARLO SIMULATIONS; SYSTEMS; GROWTH
AB I will review the role that Monte Carlo methods play in the physical sciences. They are very widely used for a number of reasons: they permit the rapid and faithful transformation of a natural or model stochastic process into a computer code. They are powerful numerical methods for treating the many-dimensional problems that derive from important physical systems. Finally, many of the methods naturally permit the use of modem parallel computers in efficient ways. In the presentation, I will emphasize four aspects of the computations: whether the computation derives from a natural or model stochastic process; whether the system under study is highly idealized or realistic; whether the Monte Carlo methodology is straightforward or mathematically sophisticated; and finally, the scientific role of the computation.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Kalos, MH (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
NR 28
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-1305-8
PY 2007
BP 254
EP 259
PG 6
WC Computer Science, Interdisciplinary Applications; Operations Research &
   Management Science; Mathematics, Applied
SC Computer Science; Operations Research & Management Science; Mathematics
GA BHT16
UT WOS:000256071800028
ER

PT B
AU Portante, EC
   Craig, BA
   Folga, SM
AF Portante, Edgar C.
   Craig, Brian A.
   Folga, Stephen M.
GP IEEE
TI NGfast: A simulation model for rapid assessment of impacts of natural
   gas pipeline breaks and flow reductions at US state borders and import
   points
SO PROCEEDINGS OF THE 2007 WINTER SIMULATION CONFERENCE, VOLS 1-5
LA English
DT Proceedings Paper
CT 2007 Winter Simulation Conference
CY DEC 09-12, 2007
CL Washington, DC
AB This paper describes NGfast, the new simulation and impact-analysis tool developed, by Argonne National Laboratory for rapid, first-stage assessments of impacts of major pipeline breaks. the methodology, calculation logic, and main assumptions are discussed. The concepts presented are most useful to state and national energy agencies tasked as first responders to such emergencies. Within minutes of the occurrence of a break, NGfast can generate an HTML-formatted report to support briefing materials for state and federal emergency responders. Sample partial results of a simulation of a real system in the United States are presented.
C1 [Portante, Edgar C.; Craig, Brian A.; Folga, Stephen M.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Portante, EC (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-1305-8
PY 2007
BP 1097
EP 1105
PG 9
WC Computer Science, Interdisciplinary Applications; Operations Research &
   Management Science; Mathematics, Applied
SC Computer Science; Operations Research & Management Science; Mathematics
GA BHT16
UT WOS:000256071800127
ER

PT B
AU Xu, NX
   Nozick, L
   Bernstein, O
   Jones, D
AF Xu, Ningxiong
   Nozick, Linda
   Bernstein, Orr
   Jones, Dean
GP IEEE
TI Stochastic rollout and justification to solve the resource-constrained
   project scheduling problem
SO PROCEEDINGS OF THE 2007 WINTER SIMULATION CONFERENCE, VOLS 1-5
LA English
DT Proceedings Paper
CT 2007 Winter Simulation Conference
CY DEC 09-12, 2007
CL Washington, DC
ID GENETIC ALGORITHM; SEARCH; CLASSIFICATION; OPTIMIZATION; ALLOCATION
AB The key question addressed by the resource-constrained project scheduling problem (RCPSP) is to determine the start times for each activity such that precedence and resource constraints are satisfied while achieving some objective. Priority rule-based heuristics are widely used for large problems and more recently justification has been shown to be an important extension. Xu et al. further augments priority rule heuristics by creating rollout procedures and proves their effectiveness. However, that procedure generates just one schedule. We extend that method using sampling to generate a set of schedules using probabilistic techniques and select the best schedule from this sample. Using the 600 problem instances in PSLIB, we present empirical evidence that this procedure produces solutions that are better than the rollout procedure alone but at a computational cost.
C1 [Xu, Ningxiong; Nozick, Linda] Cornell Univ, Hollister Hall, Ithaca, NY 14853 USA.
   [Bernstein, Orr; Jones, Dean] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Xu, NX (reprint author), Cornell Univ, Hollister Hall, Ithaca, NY 14853 USA.
EM nx22@cornell.edu; lkn3@cornell.edu; oyberns@sandia.gov; jones@sandia.gov
NR 49
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-1305-8
PY 2007
BP 1799
EP 1806
PG 8
WC Computer Science, Interdisciplinary Applications; Operations Research &
   Management Science; Mathematics, Applied
SC Computer Science; Operations Research & Management Science; Mathematics
GA BHT16
UT WOS:000256071801054
ER

EF