FN Thomson Reuters Web of Science™ VR 1.0 PT J AU WONG, WH HANSON, ME CLARK, WG GRUNER, G THOMPSON, JD WHETTEN, RL HUANG, SM KANER, RB DIEDERICH, F PETIT, P ANDRE, JJ HOLCZER, K AF WONG, WH HANSON, ME CLARK, WG GRUNER, G THOMPSON, JD WHETTEN, RL HUANG, SM KANER, RB DIEDERICH, F PETIT, P ANDRE, JJ HOLCZER, K TI NORMAL-STATE MAGNETIC-PROPERTIES OF K3C60 SO EUROPHYSICS LETTERS LA English DT Article AB We report measurements of the bulk magnetic susceptibility, the EPR susceptibility, and the C-13 nuclear spin-lattice relaxation and paramagnetic shift in the normal state of K3 C60. Many aspects of the results indicate that the conduction electron properties can be modeled by Fermi-liquid behavior in a narrow band. Some weak-temperature dependences are observed that deviate from simple metallic behavior and may reflect interactions in the system. The parameters we obtain from a nearly-free-electron analysis are in reasonable agreement with band structure calculations, photoemission experiments, and the superconducting-state parameters. C1 UNIV CALIF LOS ANGELES,CTR SOLID STATE SCI,DEPT CHEM & BIOCHEM,LOS ANGELES,CA 90024. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. CNRS,INST CHARLES SADRON,CRM,F-67083 STRASBOURG,FRANCE. UNIV PARIS 11,PHYS SOLIDES LAB,F-91405 ORSAY,FRANCE. RP WONG, WH (reprint author), UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024, USA. NR 26 TC 75 Z9 75 U1 1 U2 6 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD FEB 14 PY 1992 VL 18 IS 1 BP 79 EP 84 DI 10.1209/0295-5075/18/1/015 PG 6 WC Physics, Multidisciplinary SC Physics GA HD994 UT WOS:A1992HD99400015 ER PT J AU PAN, LS KANIA, DR HAN, S AGER, JW LANDSTRASS, M LANDEN, OL PIANETTA, P AF PAN, LS KANIA, DR HAN, S AGER, JW LANDSTRASS, M LANDEN, OL PIANETTA, P TI ELECTRICAL TRANSPORT-PROPERTIES OF UNDOPED CVD DIAMOND FILMS SO SCIENCE LA English DT Article ID CHEMICAL VAPOR-DEPOSITION; THIN-FILMS AB Polycrystalline diamond films synthesized by microwave-assisted chemical vapor deposition (MACVD) were examined with transient photoconductivity, and two fundamental electrical transport properties, the carrier mobility and lifetime, were measured. The highest mobility measured is 50 centimeters squared per volt per second at low initial carrier densities (< 10(15) per cubic centimeter). Electron-hole scattering causes the carrier mobility to decrease at higher carrier densities. Although not measured directly, the carrier lifetime was inferred to be 40 picoseconds. The average drift length of the carriers is smaller than the average grain size and appears to be limited by defects within the grains. The carrier mobility in the MACVD films is higher than values measured in lower quality dc-plasma films but is much smaller than that of single-crystal natural diamond. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720. STANFORD LINEAR ACCELERATOR CTR,STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94309. CRYSTALLUME,MENLO PK,CA 94025. RP PAN, LS (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,L-476,POB 5508,LIVERMORE,CA 94550, USA. OI Ager, Joel/0000-0001-9334-9751 NR 32 TC 38 Z9 38 U1 0 U2 9 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD FEB 14 PY 1992 VL 255 IS 5046 BP 830 EP 833 DI 10.1126/science.255.5046.830 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HD548 UT WOS:A1992HD54800031 PM 17756429 ER PT J AU HOHIMER, JP CRAFT, DC HADLEY, GR VAWTER, GA AF HOHIMER, JP CRAFT, DC HADLEY, GR VAWTER, GA TI CW ROOM-TEMPERATURE OPERATION OF Y-JUNCTION SEMICONDUCTOR RING LASERS SO ELECTRONICS LETTERS LA English DT Article DE SEMICONDUCTOR LASERS; LASERS AB CW room-temperature lasing in Y-junction semiconductor ring lasers with radii as small as 50-mu-m is reported. The dependence of the threshold current density on device dimensions is examined for radii in the range 50-200-mu-m and for waveguide widths of 2-8-mu-m. From these quantum-well devices, approximately 1 mW of CW single-frequency TE-polarised lasing output is obtained. RP SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. NR 10 TC 15 Z9 15 U1 0 U2 1 PU INST ENGINEERING TECHNOLOGY-IET PI HERTFORD PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND SN 0013-5194 EI 1350-911X J9 ELECTRON LETT JI Electron. Lett. PD FEB 13 PY 1992 VL 28 IS 4 BP 374 EP 375 DI 10.1049/el:19920234 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA HE563 UT WOS:A1992HE56300022 ER PT J AU DONG, W BAIRD, T FRYER, JR GILMORE, CJ MACNICOL, DD BRICOGNE, G SMITH, DJ OKEEFE, MA HOVMOLLER, S AF DONG, W BAIRD, T FRYER, JR GILMORE, CJ MACNICOL, DD BRICOGNE, G SMITH, DJ OKEEFE, MA HOVMOLLER, S TI ELECTRON-MICROSCOPY AT 1-A RESOLUTION BY ENTROPY MAXIMIZATION AND LIKELIHOOD RANKING SO NATURE LA English DT Article ID MULTISOLUTION METHOD; PHASE DETERMINATION; MOLECULAR-CRYSTALS; MAXIMUM-ENTROPY AB The resolution of electron microscopy may be extended by combining the phase information in microscope images with electron diffraction intensities. A general method for obtaining structural reconstructions at a resolution greater than that of the phase information is demonstrated for crystals of perchlorocoronene. By using entropy maximization methods combined with likelihood ranking, the resolution is extended from 0.32 nm in the microscope images to 0.1 nm in the reconstruction from phase and intensity data. C1 UNIV GLASGOW,CTR ELECTRON MICROSCOPE,CHEM BLDG,GLASGOW G12 8QQ,SCOTLAND. LAB UTILISAT RAYONNEMENT ELECTROMAGNET,F-91405 ORSAY,FRANCE. UNIV GLASGOW,DEPT CHEM,GLASGOW G12 8QQ,SCOTLAND. MRC,MOLEC BIOL LAB,CAMBRIDGE CB2 2QH,ENGLAND. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,NATL CTR ELECTRON MICROSCOPY,BERKELEY,CA 94720. UNIV STOCKHOLM,S-10691 STOCKHOLM,SWEDEN. ARIZONA STATE UNIV,CTR SOLID STATE SCI,TEMPE,AZ 85287. NR 22 TC 79 Z9 81 U1 1 U2 6 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD FEB 13 PY 1992 VL 355 IS 6361 BP 605 EP 609 DI 10.1038/355605a0 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HD547 UT WOS:A1992HD54700042 ER PT J AU SRIVASTAVA, DK SINHA, B GYULASSY, M WANG, XN AF SRIVASTAVA, DK SINHA, B GYULASSY, M WANG, XN TI DYNAMIC VERSUS DECAY PHOTONS IN A + A COLLISIONS AT SQUARE-ROOT S = 200-A GEV SO PHYSICS LETTERS B LA English DT Article ID QUARK-GLUON PLASMA; DILEPTON EMISSION; HADRON-COLLISIONS AB Dynamical photons produced via qg --> q-gamma and qqBAR --> g-gamma-processes in an equilibrated quark-gluon plasma are calculated in a hydrodynamic model for a wide range of initial conditions in ultra-relativistic heavy ion collisions. Electromagnetic decay photons are calculated via the Monte Carlo HIJING model including multiple minijet production. If rapid thermalization occurs and the decay photons can be subtracted with high efficiency, the dynamical photons in the range p(T) > 2 GeV may serve as a useful probe of the initial conditions in the plasma. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. DUKE UNIV,DEPT PHYS,DURHAM,NC 27706. RP SRIVASTAVA, DK (reprint author), VARIABLE ENERGY CYCLOTRON CTR,1 AF BIDHAN NAGAR,CALCUTTA 700064,INDIA. NR 18 TC 29 Z9 29 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD FEB 13 PY 1992 VL 276 IS 3 BP 285 EP 289 DI 10.1016/0370-2693(92)90319-Y PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HK187 UT WOS:A1992HK18700005 ER PT J AU ALDE, D BINON, FG BOUTEMEUR, M BRICMAN, C DONSKOV, SV GOUANERE, M INABA, S INYAKIN, AV KACHANOV, VA KHAUSTOV, GV KOBAYASHI, M KNAPP, EA KULIK, AV LANDSBERG, GL LEDNEV, AA LISHIN, VA NAKAMURA, T PEIGNEUX, JP POLOVNIKOV, SA POULET, M PROKOSHKIN, YD SADOVSKY, SA SAMOYLENKO, VD SHAGIN, PM SHTANNIKOV, AV SINGOVSKY, AV STROOT, JP SUGONYAEV, VP TAKAMATSU, K TSURU, T AF ALDE, D BINON, FG BOUTEMEUR, M BRICMAN, C DONSKOV, SV GOUANERE, M INABA, S INYAKIN, AV KACHANOV, VA KHAUSTOV, GV KOBAYASHI, M KNAPP, EA KULIK, AV LANDSBERG, GL LEDNEV, AA LISHIN, VA NAKAMURA, T PEIGNEUX, JP POLOVNIKOV, SA POULET, M PROKOSHKIN, YD SADOVSKY, SA SAMOYLENKO, VD SHAGIN, PM SHTANNIKOV, AV SINGOVSKY, AV STROOT, JP SUGONYAEV, VP TAKAMATSU, K TSURU, T TI FURTHER-STUDIES OF THE X(1910) MESON SO PHYSICS LETTERS B LA English DT Article AB New data on the eta'eta-system produced in the pi--p charge exchange reaction at 38 GeV/c momentum confirm the existence of the narrow eta'eta-resonance X(1910). The hypothesis of the X(1910) quantum numbers being a J(PC) = 1-+, forbidden for the qqBAR meson, is proposed to explain the extremely low limits obtained for X(1910) decays through pi-0-pi-0, eta-eta and Ks0Ks0 channels and the flat t-dependence of the X(1910) production cross section. C1 INST INTERUNIV SCI NUCL,B-1050 BRUSSELS,BELGIUM. UNIV LIBRE BRUXELLES,B-1050 BRUSSELS,BELGIUM. CERN,CH-1211 GENEVA 23,SWITZERLAND. PROTVINO HIGH ENERGY PHYS INST,PROTVINO 142284,USSR. LAB ANNECY LE VIEUX PHYS PARTICULES,F-74019 ANNECY LE VIEUX,FRANCE. NATL LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN. MIYASAKI UNIV,MIYAZAKI 88921,JAPAN. RP ALDE, D (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87544, USA. NR 19 TC 20 Z9 20 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD FEB 13 PY 1992 VL 276 IS 3 BP 375 EP 378 DI 10.1016/0370-2693(92)90334-Z PG 4 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HK187 UT WOS:A1992HK18700020 ER PT J AU ALVES, CA SMITH, EL PORTER, MD AF ALVES, CA SMITH, EL PORTER, MD TI ATOMIC SCALE IMAGING OF ALKANETHIOLATE MONOLAYERS AT GOLD SURFACES WITH ATOMIC FORCE MICROSCOPY SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID SCANNING TUNNELING MICROSCOPY; SELF-ASSEMBLED MONOLAYERS; ORGANOSULFUR COMPOUNDS; ORGANIC-SURFACES; METAL-SURFACES; FILMS; ELECTRODES; MOLECULES; ADSORPTION; CHEMISORPTION AB Monolayer films formed by the chemisorption of alkanethiols (CH3(CH2)nSH, n = 1-17) at epitaxially grown Au(111) films were examined using atomic force microscopy (AFM). Atomically resolved images were found for films with n greater-than-or-equal-to 4, directly revealing for the first time the arrangement of the alkyl chain structure. All of the images exhibit a periodic hexagonal pattern of equivalent spacings (e.g., respective nearest- and next-nearest-neighbor distances of 0.52 +/- 0.03 and 0.90 +/- 0.04 nm for n = 17 and 0.51 +/- 0.02 and 0.92 +/- 0.06 nm for n = 5). These spacings agree well with the analogous 0.50- and 0.87-nm distances of a (square-root 3 x square-root 3)R30-degrees adlayer on a Au(111) lattice, the two-dimensional arrangement reported in recent diffraction 1-3 and scanning tunneling microscopy 4,5 studies. In some instances, images with the above spacings were observed to extend continuously over areas as large as 100 nm2, suggesting the potential of AFM to reveal both the short- and long-range order of the alkyl chains of these and other model interfacial structures. The implications of these findings, including the inability to obtain well-resolved images for films with n less-than-or-equal-to 3, are examined in the context both of the current structural descriptions of alkanethiolate monolayers and of general issues related to imaging organic films with AFM. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 69 TC 342 Z9 342 U1 4 U2 35 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD FEB 12 PY 1992 VL 114 IS 4 BP 1222 EP 1227 DI 10.1021/ja00030a015 PG 6 WC Chemistry, Multidisciplinary SC Chemistry GA HD978 UT WOS:A1992HD97800015 ER PT J AU COLUMBIA, MR CRABTREE, AM THIEL, PA AF COLUMBIA, MR CRABTREE, AM THIEL, PA TI THE TEMPERATURE AND COVERAGE DEPENDENCES OF ADSORBED FORMIC-ACID AND ITS CONVERSION TO FORMATE ON PT(111) SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID ELECTRON-ENERGY LOSS; VIBRATIONAL SPECTROSCOPY; DECOMPOSITION; SURFACE; ADSORPTION; NI(110); KINETICS; OXYGEN; HCOOH; IDENTIFICATION AB We have studied the adsorption of HCOOH on Pt(111) at 80-100 K and its conversion to formate with increasing surface temperature. The techniques employed are thermal desorption spectroscopy and high-resolution electron energy loss spectroscopy. At very low exposures (< 0.2 langmuir), we Posit that HCOOH exists molecularly as monomers or discrete dimer pairs. As exposure increases, there is evidence for hydrogen-bonded chains with the molecular plane of HCOOH nearly parallel to the surface, At an exposure of 0.2 L, these chains resemble the solid-phase beta-polymorph as indicated by the vibrational frequencies of the OH out-of-plane bending vibration. Heating this surface causes the chains to break apart into discrete dimer pairs, followed by deprotonation to a bridging formate adspecies. The formate decomposes between 210 K and 280 K, causing CO2 desorption and leaving hydrogen adatoms. Increasing the exposure above 0.6 L causes the chains to adopt a structure similar to the denser alpha-polymorph. Heating this surface causes molecular desorption in two states. One is centered at 160 K and is dominated by gaseous HCOOH dimers. Desorption in this state leaves bridging formate and beta-polymorphic HCOOH coexistent on the surface. The other is centered at 200 K and is primarily gaseous monomers. Desorption in this state leaves only the formate adspecies. Its decomposition then proceeds as on the surface exposed to 0.2 L HCOOH. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 38 TC 77 Z9 77 U1 2 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD FEB 12 PY 1992 VL 114 IS 4 BP 1231 EP 1237 DI 10.1021/ja00030a017 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA HD978 UT WOS:A1992HD97800017 ER PT J AU NAKATA, M FREI, H AF NAKATA, M FREI, H TI CHEMICAL TRAPPING OF ELECTRONICALLY EXCITED BIRADICALS UPON VISIBLE LIGHT-INDUCED OXYGEN-ATOM TRANSFER FROM NO2 TO ALLENE AND DIMETHYLACETYLENE IN A CRYOGENIC MATRIX SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID RARE-GAS MATRICES; NITROGEN-DIOXIDE; RED-LIGHT; PHOTOLYSIS; SPECTRA; KETENE; ABINITIO; O(P-3); ENERGY; PATHS AB Oxygen-atom transfer from NO2 to allene and dimethylacetylene was observed upon excitation of reactant pairs in solid Ar at wavelengths as long as 585 (NO2 + allene) and 610 nm (NO2 + dimethylacetylene). Continuous wave dye laser radiation was used to initiate reaction, and product growth was monitored by FT-infrared spectroscopy. In the case of the allene + NO2 reaction 2-allyl nitrite radical was obtained as product, while excitation of dimethylacetylene-NO2 pairs gave acetyl methyl iminoxy radical and dimethylketene + NO. Structures of products were determined by N-15 and O-18 isotopic substitution and, in the case of allyl nitrite radical, by observation of photodissociation products allene oxide and cyclopropanone. The observed radicals constitute transient biradicals formed upon O-atom transfer that are chemically trapped by NO cage coproduct. Interpretation by aid of literature ab initio results indicates that in the case of allene + NO2 the observed nitrite radical is 2-allenylidoxy biradical trapped in a B1 excited state. The iminoxy radical product of the dimethylacetylene photooxidation is a trapped singlet excited acetylmethyl methylene biradical. This is the first insight into O-atom transfer paths involving cumulene and CC triple bonds gained by chemical trapping of excited-state biradicals. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM BIODYNAM,BERKELEY,CA 94720. RI Nakata, Munetaka/C-2127-2013 NR 68 TC 29 Z9 29 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD FEB 12 PY 1992 VL 114 IS 4 BP 1363 EP 1372 DI 10.1021/ja00030a035 PG 10 WC Chemistry, Multidisciplinary SC Chemistry GA HD978 UT WOS:A1992HD97800035 ER PT J AU CHUNG, HH KIM, R KIM, SH AF CHUNG, HH KIM, R KIM, SH TI BIOCHEMICAL AND BIOLOGICAL-ACTIVITY OF PHOSPHORYLATED AND NONPHOSPHORYLATED RAS P21 MUTANTS SO BIOCHIMICA ET BIOPHYSICA ACTA LA English DT Article DE RAS; AUTOPHOSPHORYLATION; ONCOGENE; RETROVIRAL ONCOGENE ID XENOPUS OOCYTES; GTPASE ACTIVITY; BINDING DOMAIN; PROTEIN; RECONSTITUTION; HYDROLYSIS; EXPRESSION; ABSENCE; GENES AB In contrast to all cellular ras oncogenes which carry a single activating mutation at codon 12, 13 or 61, all known retroviral ras oncogenes have two mutations at codons 12 and 59. To understand the role of the mutation at codon 59, we have constructed plasmids containing genes for Harvey ras: p21(Gly-12,Thr-59) and p21(Val-12,Thr-59). Escherichia coli expressed proteins and their respective phosphorylated (P(i)) and non-phosphorylated (non-P(i)) proteins were purified to 95% homogeneity by ion-exchange chromatography and gel filtration. GTPase, autophosphorylation and nucleotide exchange activities of the mutants were studied. When the mutants were microinjected into Xenopus oocytes, the non-phosphorylated forms of p21(Gly-12,Thr-59) and p21(Val-12,Thr-59) showed high activity. Surprisingly, their phosphorylated forms were inactive. These results suggest that threonine at position 59 endows the protein with transforming activity but that phosphorylation of the residue inhibits biological activity. A structural interpretation of the observation is presented. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 35 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0006-3002 J9 BIOCHIM BIOPHYS ACTA PD FEB 11 PY 1992 VL 1129 IS 3 BP 278 EP 286 DI 10.1016/0167-4781(92)90504-S PG 9 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA HF829 UT WOS:A1992HF82900004 PM 1536879 ER PT J AU QUENTIN, Y AF QUENTIN, Y TI FUSION OF A FREE LEFT ALU MONOMER AND A FREE RIGHT ALU MONOMER AT THE ORIGIN OF THE ALU FAMILY IN THE PRIMATE GENOMES SO NUCLEIC ACIDS RESEARCH LA English DT Article ID REPETITIVE DNA ELEMENTS; REPEATED SEQUENCES; SUCCESSIVE WAVES; LINEAGE HISTORY; RNA SEQUENCES; EVOLUTION; GENES; RETROPOSONS; FIXATION AB In the primate genome, a typical Alu element corresponds to a dimeric structure composed of two different but related monomeric sequences arranged in tandem. However, the analysis of primate sequences found in GenBank reveals the presence of free left and free right Alu elements. Here, we report the statistical study of those monomeric elements. We found that only a small fraction of them results from a deletion of a dimeric Alu sequence. The majority derives from the amplification of monomeric progenitor sequences and constitutes two families of monomeric elements: a family of free left Alu monomers that is composed of two subfamilies and a small family of free right Alu monomers. Both families predated the dimeric Alu elements, and a phylogenetic analysis strongly suggests that the first progenitor of the dimeric Alu family arose through the fusion of a free left monomer with a free right monomer. RP QUENTIN, Y (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,THEORET BIOL & BIOPHYS GRP,T-10,MS K710,LOS ALAMOS,NM 87545, USA. FU NIGMS NIH HHS [GM-37812] NR 40 TC 55 Z9 55 U1 0 U2 2 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD FEB 11 PY 1992 VL 20 IS 3 BP 487 EP 493 DI 10.1093/nar/20.3.487 PG 7 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA HE570 UT WOS:A1992HE57000016 PM 1741283 ER PT J AU ZHANG, X HASHIMOTO, T JOY, DC AF ZHANG, X HASHIMOTO, T JOY, DC TI ELECTRON HOLOGRAPHIC STUDY OF FERROELECTRIC DOMAIN-WALLS SO APPLIED PHYSICS LETTERS LA English DT Article AB Electron holography performed in a transmission electron microscope, has been used to measure the width of 90-degrees domain walls in tetragonal BaTiO3, and to determine the magnitude and distribution of the polarization across these walls. The walls are found to be between 15 and 25 angstrom in width. The polarization and its measured variation are in good agreement with other estimates. Fringe splitting has been observed in some holograms and it is suggested that this is due to the presence of charged oxygen vacancies on the walls. C1 HITACHI LTD,DIV SCI INSTRUMENT,KOKUBUNJI,TOKYO 185,JAPAN. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP ZHANG, X (reprint author), UNIV TENNESSEE,EM FACIL,KNOXVILLE,TN 37996, USA. NR 9 TC 63 Z9 65 U1 2 U2 13 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD FEB 10 PY 1992 VL 60 IS 6 BP 784 EP 786 DI 10.1063/1.106519 PG 3 WC Physics, Applied SC Physics GA HC820 UT WOS:A1992HC82000041 ER PT J AU LATROCHE, M SELSANE, M GODART, C SCHIFFMACHER, G THOMPSON, JD BEYERMANN, WP AF LATROCHE, M SELSANE, M GODART, C SCHIFFMACHER, G THOMPSON, JD BEYERMANN, WP TI STRUCTURAL DISTORTION IN RPT2SN2 COMPOUNDS (R = RARE-EARTHS) SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article; Proceedings Paper CT 10TH INTERNATIONAL CONF ON SOLID COMPOUNDS OF TRANSITION ELEMENTS ( SCTE-10 ) CY MAR 21-25, 1991 CL MUNSTER, GERMANY ID CRYSTAL-STRUCTURE AB Most of the RM2X2 compounds can be described in tetragonal systems either in the ThCr2Si2 type or in the CaBe2Ge2 type. However, recent work has shown that, for large atoms such as M = Pt or Ir and X = Ge or Sn, structural distortions occur, leading to less symmetrical cells. Here, we report on CexLa1-xPt2Sn2 compounds (x = 1, 0.8 and 0) which exhibit monoclinic distortion and superlattice lines after annealing. C1 CNRS,UNITE RECH PROPRE 210,ELEMENTS TRANSIT SOLIDES,F-92195 MEUDON,FRANCE. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP LATROCHE, M (reprint author), CNRS,UNITE RECH PROPRE 209,CHIM MET TERRES RARES,1 PL A BRIAND,F-92195 MEUDON,FRANCE. RI LATROCHE, MICHEL/L-6254-2014 OI LATROCHE, MICHEL/0000-0002-8677-8280 NR 13 TC 12 Z9 12 U1 0 U2 3 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD FEB 10 PY 1992 VL 178 BP 223 EP 228 DI 10.1016/0925-8388(92)90265-B PG 6 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA HG104 UT WOS:A1992HG10400028 ER PT J AU DOUGHTY, C PRUESS, K AF DOUGHTY, C PRUESS, K TI A SIMILARITY SOLUTION FOR 2-PHASE WATER, AIR, AND HEAT-FLOW NEAR A LINEAR HEAT-SOURCE IN A POROUS-MEDIUM SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID SATURATED FRACTURED TUFF; THERMOHYDROLOGIC CONDITIONS; CAPILLARY-PRESSURE; FLUID-FLOW AB Placement of a heat source in a partially saturated geologic medium causes strongly coupled thermal and hydrologic behavior. To study this problem, a recently developed semianalytical solution for two-phase flow of water and heat in a porous medium has been extended to include an air component and to incorporate several physical effects that broaden its range of applicability. The problem considered is the placement of a constant-strength linear heat source in an infinite homogeneous medium with uniform initial conditions. Under these conditions the governing partial differential equations in radial distance r and time t reduce to ordinary differential equations through the introduction of a similarity variable eta = r/t1/2. The resulting equations are coupled and nonlinear, necessitating a numerical integration. The similarity solution developed here is used to investigate various physical phenomena related to partially saturated flow in low-permeability rock, such as vapor pressure lowering, pore level phase change effects, and an effective continuum representation of fractured/porous media. Application to several illustrative problems arising in the context of high-level nuclear waste disposal at Yucca Mountain, Nevada, indicates that fluid flow, phase changes, and latent heat transfer may have a significant impact on conditions at the repository. RP UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV EARTH SCI, 1 CYCLOTRON RD, BERKELEY, CA 94720 USA. RI Doughty, Christine/G-2389-2015 NR 30 TC 15 Z9 16 U1 1 U2 3 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9313 EI 2169-9356 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD FEB 10 PY 1992 VL 97 IS B2 BP 1821 EP 1838 DI 10.1029/91JB02768 PG 18 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA HD477 UT WOS:A1992HD47700012 ER PT J AU FAINSTEIN, A TOVAR, M FISK, Z AF FAINSTEIN, A TOVAR, M FISK, Z TI COUPLED WEAK FERROMAGNETIC PARAMAGNETIC EXCITATIONS IN (GD0.5EU0.5)2CUO4 SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID MAGNETIC-PROPERTIES; CRYSTAL-STRUCTURE; GD2CUO4; SUPERCONDUCTIVITY AB The electron paramagnetic resonance spectra of Gd3+ in single crystals of (GD0.5Eu0.5)2CuO4 show an anomalous anisotropy for temperatures below the magnetic ordering of the Cu ions (T congruent-to 280 K). We have performed a detailed experimental study of this feature, and we discuss our results in terms of a model that assumes a weak Heisenberg interaction between Cu and Gd moments. We show that that anisotropy is a consequence of the dynamic coupling of the Gd3+ paramagnetic mode with a weak ferromagnetic mode originating in the Cu magnetic moments. C1 CSIC,INST CIENCIA MAT,E-08193 BARCELONA,SPAIN. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87544. INST BALSEIRO,RA-8400 BARILOCHE,RIO NEGRO,ARGENTINA. RP FAINSTEIN, A (reprint author), CTR ATOM BARILOCHE,RA-8400 BARILOCHE,RIO NEGRO,ARGENTINA. NR 22 TC 13 Z9 13 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD FEB 10 PY 1992 VL 4 IS 6 BP 1581 EP 1593 DI 10.1088/0953-8984/4/6/024 PG 13 WC Physics, Condensed Matter SC Physics GA HD367 UT WOS:A1992HD36700024 ER PT J AU BARBIERI, R HALL, LJ AF BARBIERI, R HALL, LJ TI GRAND UNIFICATION AND THE SUPERSYMMETRIC THRESHOLD SO PHYSICAL REVIEW LETTERS LA English DT Article ID SU(5) AB It is shown that grand unification of the minimal supersymmetric standard model does not lead to a prediction for the scale of the superpartner masses, even if the inputs-alpha, sin2-theta, and alpha(s), are known exactly. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720. IST NAZL FIS NUCL,PISA,ITALY. RP BARBIERI, R (reprint author), UNIV PISA,DEPT PHYS,I-56100 PISA,ITALY. NR 8 TC 75 Z9 75 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 10 PY 1992 VL 68 IS 6 BP 752 EP 753 DI 10.1103/PhysRevLett.68.752 PG 2 WC Physics, Multidisciplinary SC Physics GA HC505 UT WOS:A1992HC50500008 ER PT J AU BERGER, MS CHANOWITZ, MS AF BERGER, MS CHANOWITZ, MS TI PROBING W-BOSON AND TOP-QUARK MASS GENERATION WITH STRONG ZZ SCATTERING SIGNALS SO PHYSICAL REVIEW LETTERS LA English DT Article ID INTERACTING WS; HIGGS BOSONS; PAIR PRODUCTION; ZS; THEOREMS AB The Z-boson pair signal from strong WW scattering, WW --> ZZ, is significantly enhanced by a contribution from gluon-gluon fusion, gg --> ZZ, if W-boson and t-quark masses are both generated by electroweak symmetry breaking condensates formed by quanta heavier than 1 TeV. By measuring the two components of the signal it will be possible to probe for different origins of the W-boson and t-quark masses. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV PHYS,THEORET PHYS GRP,1 CYCLOTRON RD,BERKELEY,CA 94720. NR 30 TC 10 Z9 10 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 10 PY 1992 VL 68 IS 6 BP 757 EP 760 DI 10.1103/PhysRevLett.68.757 PG 4 WC Physics, Multidisciplinary SC Physics GA HC505 UT WOS:A1992HC50500010 ER PT J AU DURYEA, J GUGLIELMO, G HELLER, K JOHNS, K SHUPE, M THORNE, K JAMES, C LUK, KB RAMEIKA, R HO, PM LONGO, MJ DIEHL, HT TEIGE, S THOMSON, GB AF DURYEA, J GUGLIELMO, G HELLER, K JOHNS, K SHUPE, M THORNE, K JAMES, C LUK, KB RAMEIKA, R HO, PM LONGO, MJ DIEHL, HT TEIGE, S THOMSON, GB TI PRECISE MEASUREMENT OF THE XI-MAGNETIC MOMENT SO PHYSICAL REVIEW LETTERS LA English DT Article ID PRODUCTION POLARIZATION; HYPERON; PROTONS AB With 4.36 x 10(6) events, spin precession in a magnetic field has been used to measure the magnetic moment of the THETA- hyperon as -0.6505 +/- 0.0025 nuclear magnetons. C1 FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV MICHIGAN,DEPT PHYS,ANN ARBOR,MI 48109. RUTGERS STATE UNIV,DEPT PHYS & ASTRON,PISCATAWAY,NJ 08854. RP DURYEA, J (reprint author), UNIV MINNESOTA,SCH PHYS & ASTRON,MINNEAPOLIS,MN 55455, USA. NR 18 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 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 10 PY 1992 VL 68 IS 6 BP 768 EP 771 DI 10.1103/PhysRevLett.68.768 PG 4 WC Physics, Multidisciplinary SC Physics GA HC505 UT WOS:A1992HC50500013 ER PT J AU BOWMAN, JD GARVEY, GT GOULD, CR HAYES, AC JOHNSON, MB AF BOWMAN, JD GARVEY, GT GOULD, CR HAYES, AC JOHNSON, MB TI PARITY VIOLATION IN THE COMPOUND NUCLEUS - THE ROLE OF DISTANT STATES SO PHYSICAL REVIEW LETTERS LA English DT Article ID FUNDAMENTAL SYMMETRIES; SPATIAL-PARITY; RESONANCES; NONCONSERVATION; TESTS AB We explain why the measured parity-violating asymmetries for p1/2 compound-nuclear resonances tend to have a common sign. We show that the asymmetry is a sum of two terms: an average term dominated by admixtures of distant levels and a term that fluctuates from resonance to resonance dominated by admixtures of nearby compound-nuclear states. The average asymmetry involves single-particle transition amplitudes of the parity-violating interaction, while the fluctuating asymmetry retains a statistical character. Our theoretical estimate of the average asymmetry agrees with a value extracted from experimental data. RP BOWMAN, JD (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. RI Gould, Christopher/M-7676-2013 NR 19 TC 49 Z9 49 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 10 PY 1992 VL 68 IS 6 BP 780 EP 783 DI 10.1103/PhysRevLett.68.780 PG 4 WC Physics, Multidisciplinary SC Physics GA HC505 UT WOS:A1992HC50500016 ER PT J AU PORTER, JL SPIELMAN, RB MATZEN, MK MCGUIRE, EJ RUGGLES, LE VARGAS, MF APRUZESE, JP CLARK, RW DAVIS, J AF PORTER, JL SPIELMAN, RB MATZEN, MK MCGUIRE, EJ RUGGLES, LE VARGAS, MF APRUZESE, JP CLARK, RW DAVIS, J TI DEMONSTRATION OF POPULATION-INVERSION BY RESONANT PHOTOPUMPING IN A NEON GAS CELL IRRADIATED BY A SODIUM Z-PINCH SO PHYSICAL REVIEW LETTERS LA English DT Article ID X-RAY LASER AB The broadband radiation emitted from a Na Z pinch is used to photoionize Ne to the He-like ground state and radiation from the Na 1s2-1 s2-1 s 2p P-1(1) transition is used to resonantly photoexcite the Ne 1s2-1s4p P-1(1) transition. Time-resolved and time-integrated spectral measurements of the Ne K-shell emission demonstrate the first population inversion driven by a Z pinch. This is the first experiment in any medium to demonstrate a soft-x-ray inversion pumped solely by resonant photoexcitation. C1 USN,RES LAB,WASHINGTON,DC 20375. RP PORTER, JL (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 16 TC 53 Z9 53 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 10 PY 1992 VL 68 IS 6 BP 796 EP 799 DI 10.1103/PhysRevLett.68.796 PG 4 WC Physics, Multidisciplinary SC Physics GA HC505 UT WOS:A1992HC50500020 ER PT J AU SHI, XD KORTAN, AR WILLIAMS, JM KINI, AM SAVALL, BM CHAIKIN, PM AF SHI, XD KORTAN, AR WILLIAMS, JM KINI, AM SAVALL, BM CHAIKIN, PM TI SOUND-VELOCITY AND ATTENUATION IN SINGLE-CRYSTAL C60 SO PHYSICAL REVIEW LETTERS LA English DT Article ID C-60 AB We report the studies of the elasticity of C60 single crystals. For sublimed fcc crystals, Young's modulus has an 8% jump at the first-order transition at 260 K. At approximately 160 K there is a frequency-dependent elastic anomaly resulting from time-dependent stress relaxation. Comparison with rotation rates seen in NMR suggests that the dynamics below 260 K is more complex than jumps between equivalent molecular configurations. Solvent grown monoclinic crystals have a second-order transition at 242 K, while the 160-K glass transition remains unchanged. C1 UNIV PENN,DEPT PHYS,PHILADELPHIA,PA 19104. ARGONNE NATL LAB,ARGONNE,IL 60439. AT&T BELL LABS,MURRAY HILL,NJ 07974. RP SHI, XD (reprint author), PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08544, USA. RI Kini, Aravinda/F-4467-2012 NR 17 TC 202 Z9 212 U1 1 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 10 PY 1992 VL 68 IS 6 BP 827 EP 830 DI 10.1103/PhysRevLett.68.827 PG 4 WC Physics, Multidisciplinary SC Physics GA HC505 UT WOS:A1992HC50500028 ER PT J AU ICE, GE SPARKS, CJ HABENSCHUSS, A SHAFFER, LB AF ICE, GE SPARKS, CJ HABENSCHUSS, A SHAFFER, LB TI ANOMALOUS X-RAY-SCATTERING MEASUREMENT OF NEAR-NEIGHBOR INDIVIDUAL PAIR DISPLACEMENTS AND CHEMICAL ORDER IN FE22.5NI77.5 SO PHYSICAL REVIEW LETTERS LA English DT Article AB We demonstrate an anomalous-x-ray-diffraction procedure for the determination of pair correlations in crystalline solid solutions. This procedure experimentally removes the large thermal diffuse scattering background with no assumptions and Permits separation of chemically specific static displacements. We recover the near-neighbor chemical order and static displacements in a Fe22.5Ni77.5 single crystal quenched from 1000-degrees-C. The Fe-Fe nearest-neighbor distance is dilated by approximately 0.043 angstrom from the average lattice. The possible magnetic origins of this dilation are discussed. C1 ANDERSON UNIV,DEPT PHYS,ANDERSON,IN 46012. RP ICE, GE (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 11 TC 38 Z9 38 U1 0 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 10 PY 1992 VL 68 IS 6 BP 863 EP 866 DI 10.1103/PhysRevLett.68.863 PG 4 WC Physics, Multidisciplinary SC Physics GA HC505 UT WOS:A1992HC50500037 ER PT J AU LANE, PA SWANSON, LS NI, QX SHINAR, J ENGEL, JP BARTON, TJ JONES, L AF LANE, PA SWANSON, LS NI, QX SHINAR, J ENGEL, JP BARTON, TJ JONES, L TI DYNAMICS OF PHOTOEXCITED STATES IN C-60 - AN OPTICALLY DETECTED MAGNETIC-RESONANCE, ESR, AND LIGHT-INDUCED ESR STUDY SO PHYSICAL REVIEW LETTERS LA English DT Article ID SPECTRA; CARBON; SOLIDS; FILMS AB The photoluminescence, X-band optically detected magnetic resonance (ODMR), ESR, and light-induced ESR (LESR) of C60 films and C60 in toluene/polystyrene glass (C60:T/PS) are described. The ESR at g = 1.998 and delocalized triplet LESR and ODMR of C60:T/PS are similar to previously reported spectra. In films, the ODMR indicates that the delocalized triplet is larger and distorted by neighboring molecules. In addition, another, more localized triplet and a narrow photoluminescence-enhancing line at g = 2.0017 +/- 0.0005, consistent with intermolecular polaron recombination, are also observed in films but not glasses. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. RP LANE, PA (reprint author), US DOE,AMES LAB,AMES,IA 50011, USA. NR 28 TC 152 Z9 152 U1 0 U2 11 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 10 PY 1992 VL 68 IS 6 BP 887 EP 890 DI 10.1103/PhysRevLett.68.887 PG 4 WC Physics, Multidisciplinary SC Physics GA HC505 UT WOS:A1992HC50500043 ER PT J AU TANIS, JA DUBOIS, RD SCHLACHTER, AS AF TANIS, JA DUBOIS, RD SCHLACHTER, AS TI DOUBLE AND SINGLE IONIZATION OF HELIUM BY HIGH-VELOCITY N7+ IONS - COMMENT SO PHYSICAL REVIEW LETTERS LA English DT Note ID N-7+ IONS; PROTONS C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. RP TANIS, JA (reprint author), WESTERN MICHIGAN UNIV, KALAMAZOO, MI 49008 USA. NR 10 TC 8 Z9 8 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 10 PY 1992 VL 68 IS 6 BP 897 EP 897 DI 10.1103/PhysRevLett.68.897 PG 1 WC Physics, Multidisciplinary SC Physics GA HC505 UT WOS:A1992HC50500050 ER PT J AU FELINGER, A GUIOCHON, G AF FELINGER, A GUIOCHON, G TI OPTIMIZATION OF THE EXPERIMENTAL CONDITIONS AND THE COLUMN DESIGN PARAMETERS IN OVERLOADED ELUTION CHROMATOGRAPHY SO JOURNAL OF CHROMATOGRAPHY LA English DT Article ID PREPARATIVE LIQUID-CHROMATOGRAPHY; IDEAL MODEL; PROPAGATION; SIMULATION; LANGMUIR AB A theoretical study of the optimization of the separation of a binary mixture in overloaded elution chromatography was performed. The elution band profiles were calculated using the semi-ideal model of chromatography and assuming competitive Langmuir isotherms. In a first step, the experimental (operating) conditions (i.e., the reduced velocity of the mobile phase and the loading factor) were optimized using a simplex algorithm. In a second step, the column design parameters (i.e., the column length and the average particle diameter) and the operating conditions were optimized for the maximum production rate of either the more or the less retained component. The optimum value of the capacity factor of the first component, was also determined. Binary mixtures having relative retentions between 1.1 and 1.8 and relative concentrations of 1:3 and 3:1 were studied. The maximum production rates were obtained for very low values of the capacity factor of the first component, of the order of 0.3-0.5, depending slightly on the relative retention. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV ANALYT CHEM,OAK RIDGE,TN 37831. RI Felinger, Attila/A-1595-2008 OI Felinger, Attila/0000-0001-7130-1968 NR 20 TC 57 Z9 59 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR PD FEB 7 PY 1992 VL 591 IS 1-2 BP 31 EP 45 DI 10.1016/0021-9673(92)80220-O PG 15 WC Chemistry, Analytical SC Chemistry GA HF653 UT WOS:A1992HF65300003 ER PT J AU ROLES, J GUIOCHON, G AF ROLES, J GUIOCHON, G TI EXPERIMENTAL-DETERMINATION OF ADSORPTION-ISOTHERM DATA FOR THE STUDY OF THE SURFACE-ENERGY DISTRIBUTION OF VARIOUS SOLID-SURFACES BY INVERSE GAS SOLID CHROMATOGRAPHY SO JOURNAL OF CHROMATOGRAPHY LA English DT Article ID PROPAGATION AB Fine, solid ceramic particles were coated on the inner wall of an open-tubular quartz column. The tube was filled with a slurry of the particles under investigation in an appropriate solvent, closed at one end and introduced slowly into an oven where the solvent vaporized. After thermal conditioning of the column, adsorption isotherms were determined by the classical method of elution of characteristic points, using large-size samples of organic vapors (diethyl ether, chlorobutane). These isotherms were used to calculate the distribution of adsorption energy of the probe on the ceramic surface. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV ANALYT CHEM,OAK RIDGE,TN 37831. NR 33 TC 26 Z9 26 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR PD FEB 7 PY 1992 VL 591 IS 1-2 BP 233 EP 243 DI 10.1016/0021-9673(92)80242-M PG 11 WC Chemistry, Analytical SC Chemistry GA HF653 UT WOS:A1992HF65300025 ER PT J AU ROLES, J GUIOCHON, G AF ROLES, J GUIOCHON, G TI PRECISION AND ACCURACY OF THE GAS SOLID ADSORPTION-ISOTHERMS DERIVED BY THE ELUTION-BY-CHARACTERISTIC-POINTS METHOD SO JOURNAL OF CHROMATOGRAPHY LA English DT Article ID NONLINEAR CHROMATOGRAPHY; LIQUID-CHROMATOGRAPHY; FINITE CONCENTRATION; IDEAL MODEL; PROPAGATION; BAND; SIMULATION; PROFILES; SIGNALS; PEAKS AB The influence of the fluctuations of the experimental parameters on the reproducibility of the overloaded band profiles used to determine the isotherms by the elution-by-characteristic-points (ECP) method was investigated using two new tools. A parameter measuring the difference between two similar curves, such as overloaded elution profiles or adsorption isotherms, was defined. The band profiles measured were compared with those calculated from the derived isotherm, using models from the theory of non-linear chromatography. The agreement between both profiles was defined as a distance lower than twice the average distance between two profiles measured on the same day on the same column. The degree of validity of the various assumptions made in the ECP method was assessed. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV ANALYT CHEM,OAK RIDGE,TN 37831. NR 49 TC 17 Z9 17 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR PD FEB 7 PY 1992 VL 591 IS 1-2 BP 245 EP 265 DI 10.1016/0021-9673(92)80243-N PG 21 WC Chemistry, Analytical SC Chemistry GA HF653 UT WOS:A1992HF65300026 ER PT J AU ROLES, J GUIOCHON, G AF ROLES, J GUIOCHON, G TI VALIDITY OF THE MODEL USED TO RELATE THE ENERGY-DISTRIBUTION AND THE ADSORPTION-ISOTHERM SO JOURNAL OF CHROMATOGRAPHY LA English DT Article ID NITROGEN ADSORPTION; CHROMATOGRAPHY AB The reproducibility and accuracy of the determination of the adsorption energy distribution for a probe compound on a solid surface is discussed. This distribution can be calculated from the adsorption isotherm, itself derived from the chromatographic profiles of high concentration bands, using the elution by characteristic points method. Distributions derived from experimental data acquired under different experimental conditions agree well within the limits of the reproducibility of these data. Band profiles calculated from the adsorption energy distribution are also in excellent agreement with those recorded. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV ANALYT CHEM,OAK RIDGE,TN 37831. NR 15 TC 10 Z9 10 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR PD FEB 7 PY 1992 VL 591 IS 1-2 BP 267 EP 272 DI 10.1016/0021-9673(92)80244-O PG 6 WC Chemistry, Analytical SC Chemistry GA HF653 UT WOS:A1992HF65300027 ER PT J AU KRUGER, MB JEANLOZ, R PASTERNAK, MP TAYLOR, RD SNYDER, BS STACY, AM BOHLEN, SR AF KRUGER, MB JEANLOZ, R PASTERNAK, MP TAYLOR, RD SNYDER, BS STACY, AM BOHLEN, SR TI ANTIFERROMAGNETISM IN PRESSURE-AMORPHIZED FE2SIO4 SO SCIENCE LA English DT Article ID FAYALITE; GLASSES AB Amorphous FeSiO4 synthesized at elevated pressures exhibits a Neel transition at a temperature identical to that observed in the crystalline form, T(N) = 65 (+/- 2) kelvin at zero pressure. This behavior contrasts sharply with observations on other disordered systems, such as spin glasses, which characteristically exhibit strong "frustration" of the spins and consequent marked suppression of the Neel transition. C1 US GEOL SURVEY,MENLO PK,CA 94025. UNIV CALIF LOS ALAMOS SCI LAB,DIV PHYS,LOS ALAMOS,NM 87545. TEL AVIV UNIV,SCH PHYS & ASTRON,IL-69978 TEL AVIV,ISRAEL. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT GEOL & GEOPHYS,BERKELEY,CA 94720. RP KRUGER, MB (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 27 TC 18 Z9 18 U1 1 U2 9 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD FEB 7 PY 1992 VL 255 IS 5045 BP 703 EP 705 DI 10.1126/science.255.5045.703 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HC506 UT WOS:A1992HC50600033 PM 17756949 ER PT J AU STEWART, BW DEPAOLO, DJ AF STEWART, BW DEPAOLO, DJ TI DIFFUSIVE ISOTOPIC CONTAMINATION OF MAFIC MAGMA BY COEXISTING SILICIC LIQUID IN THE MUSKOX INTRUSION SO SCIENCE LA English DT Article ID LONG RESIDENCE TIMES; PRECALDERA LAVAS; RHYOLITIC MAGMA; BASALTIC MAGMA; GLASS MOUNTAIN; TRACE-ELEMENT; CHAMBERS; SR; ASSIMILATION; SYSTEM AB ShiftS in Sr-87/Sr-86 and Nd-143/Nd-144 ratios measured in cumulates from the upper levels of the Muskox mafic intrusion indicate that isotopic and bulk chemical exchange were decoupled across a mafic-silicic liquid interface during crystallization of the intrusion. Modeling of diffusive exchange between liquid layers demonstrates that isotopic compositions of silicate liquids in layered magma chambers may be strongly affected by this process on time scales of 10(3) to 10(4) years. Diffusive contamination can be used to place constraints on the physical processes and time scales of magmatic systems. C1 UNIV CALIF BERKELEY,DEPT GEOL & GEOPHYS,BERKELEY CTR ISOTOPE GEOCHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV EARTH SCI,BERKELEY,CA 94720. NR 31 TC 26 Z9 26 U1 0 U2 3 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD FEB 7 PY 1992 VL 255 IS 5045 BP 708 EP 711 DI 10.1126/science.255.5045.708 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HC506 UT WOS:A1992HC50600035 PM 17756951 ER PT J AU BARRALL, GA FRYDMAN, L CHINGAS, GC AF BARRALL, GA FRYDMAN, L CHINGAS, GC TI NMR DIFFRACTION AND SPATIAL STATISTICS OF STATIONARY SYSTEMS SO SCIENCE LA English DT Article ID NUCLEAR MAGNETIC-RESONANCE; SOLIDS AB Nuclear magnetic resonance (NMR) spatial imaging data may be acquired, processed, and interpreted in ways that provide information directly analogous to diffraction experiments, with length scales determined by gradient strength rather than radiation wavelengths. This approach, originally considered by Mansfield nearly two decades ago, provides access to autocorrelations of sample density that statistically characterize small-scale density variations. These NMR "Patterson functions" can be acquired orders of magnitude more rapidly than comparably resolved NMR images and are suitable for spatial characterization of small features in bulk samples, such as morphology in structural materials. Unlike hindered diffusion approaches, neither mobility, penetrants, nor transport time are required for examining granularity and porosity. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. NR 28 TC 39 Z9 39 U1 0 U2 5 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD FEB 7 PY 1992 VL 255 IS 5045 BP 714 EP 717 DI 10.1126/science.255.5045.714 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HC506 UT WOS:A1992HC50600037 PM 17756953 ER PT J AU SHERROW, SA HUNT, RD AF SHERROW, SA HUNT, RD TI FTIR SPECTRA OF THE HYDROLYSIS OF URANIUM HEXAFLUORIDE SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID OXIDE TETRAFLUORIDE; WATER DIMER; IR-SPECTRA; ARGON; MATRICES AB The hydrolysis of uranium hexafluoride has been examined with infrared spectroscopy under three different reaction conditions. First, UF6 was codeposited with water in excess argon at 12 K. The FTIR spectra of UF6/H2O mixtures revealed several product absorptions due to the perturbed nu-1, nu-2, and nu-3 modes of H2O as well as the nu-3 mode of UF6. These new absorptions have been assigned to the anti-hydrogen-bonded 1:1 complex, UF6-OH2. Photolysis of this weak complex produced a doublet at 868.2 and 857.1 cm-1, which has been assigned to the UOF4. Next, solid films of UF6/H2O mixtures were prepared at 12 K and slowly annealed at 242 K. The reaction profile of the UF6 hydrolysis from UF6 (or UF6-OH2) to UOF4 to UO2F2 was obtained. Finally, UF6 and H2O were reacted at low pressures and ambient temperatures in a new IR gas cell. While no gaseous uranium oxyfluorides were detected, the final product distribution inside the gas cell did indicate that the fluorinated nickel surface served as a catalyst for the UF6 hydrolysis. C1 UNIV VIRGINIA,DEPT CHEM,CHARLOTTESVILLE,VA 22901. OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. NR 21 TC 9 Z9 10 U1 1 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD FEB 6 PY 1992 VL 96 IS 3 BP 1095 EP 1099 DI 10.1021/j100182a015 PG 5 WC Chemistry, Physical SC Chemistry GA HC686 UT WOS:A1992HC68600015 ER PT J AU UCHIDA, H CURTIS, CJ KAMAT, PV JONES, KM NOZIK, AJ AF UCHIDA, H CURTIS, CJ KAMAT, PV JONES, KM NOZIK, AJ TI OPTICAL-PROPERTIES OF GAAS NANOCRYSTALS SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID SMALL SEMICONDUCTOR PARTICLES; QUANTUM CONFINEMENT; CLUSTERS; CRYSTALLITES; EXCITONS; COLLOIDS; WIRES AB A modification of a previous synthesis for the formation of GaAs nanocrystals is reported. Unlike the previous synthesis, the new procedure produces quantized GaAs colloids which do not also contain molecular species which interfere with the optical properties of the GaAs particles. The GaAs colloids have been characterized by transmission electron microscopy, electron diffraction, ultrafiltration, absorption and photoluminescence spectroscopy, and transient pump-probe spectroscopy; these experiments indicate that the particles have a size ranging from 20 to 80 angstrom. C1 SOLAR ENERGY RES INST,GOLDEN,CO 80401. OI Uchida, Hiroyuki/0000-0001-6718-5431 NR 24 TC 75 Z9 77 U1 0 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD FEB 6 PY 1992 VL 96 IS 3 BP 1156 EP 1160 DI 10.1021/j100182a026 PG 5 WC Chemistry, Physical SC Chemistry GA HC686 UT WOS:A1992HC68600026 ER PT J AU HOFFMAN, DK KOURI, DJ AF HOFFMAN, DK KOURI, DJ TI DISTRIBUTED APPROXIMATING FUNCTION-THEORY - A GENERAL, FULLY QUANTAL APPROACH TO WAVE-PROPAGATION SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID DEPENDENT SCHRODINGER-EQUATION; ARRANGEMENT-CHANNEL APPROACH; MOLECULE SURFACE SCATTERING; ACCURATE 3-DIMENSIONAL PROBABILITIES; MECHANICAL REACTIVE SCATTERING; COLLISION-INDUCED DISSOCIATION; COLLINEAR H+H2 REACTION; FOURIER METHOD SOLUTION; MONTE-CARLO METHODS; PACKET APPROACH AB A new procedure for developing a coarse-grained representation of the free particle propagator in Cartesian, cylindrical, and spherical polar coordinates is presented. The approach departs from a standard basis representation of the propagator and the state function to which it is applied. Instead, distributed approximating functions (DAFs), developed recently in the context of propagating wave packets in 1-D on an infinite line, are used to create a coarse-grained, highly banded matrix which produces arbitrarily accurate results for the free propagation of wave packets. The new DAF formalism can be used with nonuniform grid spacings. The banded, discretized matrix DAF representation of can be employed in any wave packet propagation scheme which makes use of the free propagator. A major feature of the DAF expression for the effective free propagator is that the modulus of the x(j),x(j), element is proportional to the Gaussian exp(-sigma(2)(0)(x(j) - x(f)2/2(sigma(4)(0) + h2-tau(2)/m2)). The occurrence of a tau-dependent width is a manifestation of the fundamental spreading of a wave packet as it evolves through time, and it is the minimum possible because the DAF representation of the free propagator is based on evolving the Gaussian generator of the Hermite polynomials. This suggests that the DAFs yield the most highly banded effective free propagator possible. The second major feature of the DAF representation of the free propagator is that it can be used for real time dynamics based on Feynman path integrals. This holds the possibility that the real time dynamics for multidimensional systems could be done by Monte Carlo methods with a Gaussian as the importance sampling function. C1 UNIV HOUSTON,DEPT CHEM,HOUSTON,TX 77204. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. UNIV HOUSTON,DEPT PHYS,HOUSTON,TX 77204. NR 158 TC 68 Z9 69 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD FEB 6 PY 1992 VL 96 IS 3 BP 1179 EP 1184 DI 10.1021/j100182a030 PG 6 WC Chemistry, Physical SC Chemistry GA HC686 UT WOS:A1992HC68600030 ER PT J AU SCHMOLTNER, AM ANEX, DS LEE, YT AF SCHMOLTNER, AM ANEX, DS LEE, YT TI INFRARED MULTIPHOTON DISSOCIATION OF ANISOLE - PRODUCTION AND DISSOCIATION OF PHENOXY RADICAL SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID THERMAL-DECOMPOSITION; SHOCK-WAVES; ETHER; ETHYL; BOND; MOLECULES; KINETICS; ENERGY AB The infrared multiphoton dissociation of anisole in a molecular beam was studied using pulsed CO2 laser radiation, with the product recoil energy distributions measured using the time-of-flight technique. The only primary process identified was the dissociation into phenoxy and methyl radicals, with the shape of the translational energy distribution of the products revealing a small exit barrier. Under conditions of higher laser fluence, secondary dissociation of the phenoxy radical into carbon monoxide and C5H5 was observed. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. RI Lee, Yuan-Tseh/F-7914-2012 NR 29 TC 13 Z9 13 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD FEB 6 PY 1992 VL 96 IS 3 BP 1236 EP 1240 DI 10.1021/j100182a040 PG 5 WC Chemistry, Physical SC Chemistry GA HC686 UT WOS:A1992HC68600040 ER PT J AU HUNTLEY, DR JORDAN, SL GRIMM, FA AF HUNTLEY, DR JORDAN, SL GRIMM, FA TI ADSORPTION AND THERMAL-DECOMPOSITION OF BENZENE ON NI(110) STUDIED BY CHEMICAL, SPECTROSCOPIC, AND COMPUTATIONAL METHODS SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID ENERGY LOSS SPECTROSCOPY; MOLECULAR-ORBITAL THEORY; CHEMISORBED AROMATICS; SINGLE-CRYSTALS; SURFACES; NICKEL; EXCHANGE; METAL; COORDINATION; MULTILAYERS AB The chemisorption and reactions of benzene on Ni(110) have been studied by temperature-programmed desorption (TPD) including isotopic labeling, X-ray photoelectron spectroscopy (XPS), high-resolution electron energy loss spectroscopy (HREELS), and low-energy electron diffraction (LEED) as a function of coverage and adsorption temperature between 100 and 300 K. At saturation, 70-80% of the benzene is irreversibly chemisorbed, and C-H bond scission commences at 320 K. For high exposures, molecular desorption competes with decomposition. A c(4 x 2) LEED pattern is observed at saturation coverage of chemisorbed benzene (0.2 monolayer by XPS). HREEL spectroscopy indicates that the benzene ring lies parallel to the surface. Semiempirical molecular orbital calculations have been made and predict the most likely adsorption site for benzene chemisorption to be the atop site at a height of about 1.75 angstrom or the short bridge site at 1.90 angstrom. Upon annealing above 300 K, the benzene decomposes, evolving H-2 and forming a surface carbide. Additionally, a species forms which ultimately desorbs as benzene at 460 K but also undergoes H-D exchange with benzene-d6. An unambiguous identification of this fragment has not been made, but the vibrational spectroscopy and isotopic exchange data are consistent with the assignment of a phenyl or benzyne group. The major effects of coadsorbed sulfur and oxygen are to inhibit dissociation and to weaken the interaction between the benzene and the surface. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. RP HUNTLEY, DR (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 41 TC 46 Z9 46 U1 1 U2 16 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD FEB 6 PY 1992 VL 96 IS 3 BP 1409 EP 1417 DI 10.1021/j100182a070 PG 9 WC Chemistry, Physical SC Chemistry GA HC686 UT WOS:A1992HC68600070 ER PT J AU BUXTON, J SHELBOURNE, P DAVIES, J JONES, C VANTONGEREN, T ASLANIDIS, C DEJONG, P JANSEN, G ANVRET, M RILEY, B WILLIAMSON, R JOHNSON, K AF BUXTON, J SHELBOURNE, P DAVIES, J JONES, C VANTONGEREN, T ASLANIDIS, C DEJONG, P JANSEN, G ANVRET, M RILEY, B WILLIAMSON, R JOHNSON, K TI DETECTION OF AN UNSTABLE FRAGMENT OF DNA SPECIFIC TO INDIVIDUALS WITH MYOTONIC-DYSTROPHY SO NATURE LA English DT Article ID CHROMOSOME-19; REGION; LOCUS; GENE; IDENTIFICATION; LINKAGE; MARKERS; MAP; 19Q AB MYOTONIC dystrophy (DM) is the most common form of adult muscular dystrophy, with a prevalence of 2-14 per 100,000 individuals 1. The disease is characterized by progressive muscle weakness and sustained muscle contraction, often with a wide range of accompanying symptoms. The age at onset and severity of the disease show extreme variation, both within and between families. Despite its clinical variability, this dominant condition segregates as a single locus at chromosome 19q13.3 in every population studied 1. It is flanked by the tightly linked genetic markers ERCC1 proximally 2,3 and D19S51 distally 4,5; these define the DM critical region. We report the isolation of an expressed sequence from this region which detects a DNA fragment that is larger in affected individuals than in normal siblings or unaffected controls. The size of this fragment varies between affected siblings, and increases in size through generations in parallel with increasing severity of the disease. We postulate that this unstable DNA sequence is the molecular feature that underlies DM. C1 CHARING CROSS & WESTMINSTER MED SCH,DEPT ANAT,FULHAM PALACE RD,LONDON W6 8RF,ENGLAND. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME,LIVERMORE,CA 94550. CATHOLIC UNIV NIJMEGEN,FAC MED SCI,DEPT CELL BIOL & HISTOL,6500 HB NIJMEGEN,NETHERLANDS. KAROLINSKA HOSP,DEPT CLIN GENET,S-10401 STOCKHOLM 60,SWEDEN. ST MARYS HOSP,IMPERIAL COLL,SCH MED,DEPT BIOCHEM & MOLEC GENET,LONDON W2 1PG,ENGLAND. RI Buxton, Jessica/I-4033-2014 OI Buxton, Jessica/0000-0002-0918-9335 NR 27 TC 550 Z9 556 U1 0 U2 4 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD FEB 6 PY 1992 VL 355 IS 6360 BP 547 EP 548 DI 10.1038/355547a0 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HC526 UT WOS:A1992HC52600059 PM 1346924 ER PT J AU ASLANIDIS, C JANSEN, G AMEMIYA, C SHUTLER, G MAHADEVAN, M TSILFIDIS, C CHEN, C ALLEMAN, J WORMSKAMP, NGM VOOIJS, M BUXTON, J JOHNSON, K SMEETS, HJM LENNON, GG CARRANO, AV KORNELUK, RG WIERINGA, B DEJONG, PJ AF ASLANIDIS, C JANSEN, G AMEMIYA, C SHUTLER, G MAHADEVAN, M TSILFIDIS, C CHEN, C ALLEMAN, J WORMSKAMP, NGM VOOIJS, M BUXTON, J JOHNSON, K SMEETS, HJM LENNON, GG CARRANO, AV KORNELUK, RG WIERINGA, B DEJONG, PJ TI CLONING OF THE ESSENTIAL MYOTONIC-DYSTROPHY REGION AND MAPPING OF THE PUTATIVE DEFECT SO NATURE LA English DT Article ID VECTORS; DNA AB MYOTONIC dystrophy is a common dominant disorder (global incidence of 1:8,000) with variable onset and a protean nature of symptoms mainly involving progressive muscle wasting, myotonia and cataracts 1. To define the molecular defect, we have cloned the essential region of chromosome 19q13.3, including proximal and distal markers 2-7 in a 700-kilobase contig formed by overlapping cosmids and yeast artificial chromosomes (YACs). The central part of the contig bridges an area of about 350 kilobases between two new flanking crossover borders 4,5. This segment has been extensively characterized through the isolation of five YAC clones and the subsequent subcloning in cosmids from which a detailed EcoRI, HindIII, MluI and NotI restriction map has been derived. Two genomic probes and two homologous complementary DNA probes were isolated using the cosmids. These probes are all situated within approximately 10 kilobases of genomic DNA and detect an unstable genomic segment in myotonic dystrophy patients. The length variation in this segment shows similarities to the instability seen at the fragile X locus 8. The physical map location and the genetic characteristics of the length polymorphism is compatible with a direct role in the pathogenesis of myotonic dystrophy. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME,DIV BIOMED SCI,L-452,LIVERMORE,CA 94550. CATHOLIC UNIV NIJMEGEN,FAC MED SCI,DEPT CELL BIOL & HISTOL,6500 HB NIJMEGEN,NETHERLANDS. CATHOLIC UNIV NIJMEGEN,FAC MED SCI,DEPT HUMAN GENET,6500 HB NIJMEGEN,NETHERLANDS. CHILDRENS HOSP EASTERN ONTARIO,DIV GENET,OTTAWA K1H 8L1,ONTARIO,CANADA. UNIV OTTAWA,DEPT MICROBIOL & IMMUNOL,OTTAWA K1N 6N5,ONTARIO,CANADA. CHARING CROSS & WESTMINSTER MED SCH,DEPT ANAT,LONDON W6 8RF,ENGLAND. RI Wieringa, Berend/A-5346-2011; Buxton, Jessica/I-4033-2014 OI Wieringa, Berend/0000-0001-9192-8020; Buxton, Jessica/0000-0002-0918-9335 NR 25 TC 435 Z9 436 U1 1 U2 9 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD FEB 6 PY 1992 VL 355 IS 6360 BP 548 EP 551 DI 10.1038/355548a0 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HC526 UT WOS:A1992HC52600060 PM 1346925 ER PT J AU DECAMP, D Deschizeaux, B Goy, C Lees, JP Minard, MN Alemany, R Crespo, JM Delfino, M Fernandez, E Gaitan, V Garrido, LI Mir, LLM Pacheco, A Catanesi, MG Creanza, D de Palma, M Farilla, A Iaselli, G Maggi, G Maggi, M Natali, S Nuzzo, S Quattromini, M Ranieri, A Raso, G Romano, F Ruggieri, F Selvaggi, G Silvestris, L Tempesta, P Zito, G Gao, Y Hu, H Huang, D Huang, X Lin, J Lou, J Qiao, C Ruan, T Wang, T Xie, Y Xu, D Xu, R Zhang, J Zhao, W Atwood, WB Bauerdick, LAT Bird, F Blucher, E Bonvicini, G Bossi, F Boudreau, J Brown, D Burnett, TH Drevermann, H Forty, RW Grab, C Hagelberg, R Haywood, S Hilgart, J Jost, B Kasemann, M Knobloch, J Lacourt, A Lancon, E Lehraus, I Lohse, T Lusiani, A Marchioro, A Martinez, M Mato, P Menary, S Minten, A Miotto, A Miquel, R Moser, HG Nash, J Palazzi, P Ranjard, F Redlinger, G Roth, A Rothberg, J Rotscheidt, H Saich, M St Denis, R Schlatter, D Takashima, M Talby, M Tejessy, W Wachsmuth, H Wasserbaech, S Wheeler, S Wiedenmann, W Witzeling, W Wotschack, J Ajaltouni, Z Bardadin-Otwinowska, M El Fellous, R Falvard, A Gay, P Harvey, J Henrard, P Jousset, J Michel, B Montret, JC Pallin, D Perret, P Proriol, J Prulhiere, F Stimpfl, G Hansen, JD Hansen, JR Hansen, PH Mollerud, R Nilsson, BS Efthymiopoulos, I Simopoulou, E Vayaki, A Badier, J Blondel, A Bonneaud, G Bourotte, J Braems, F Brient, JC Fouque, G Gamess, A Guirlet, R Orteu, S Rosowsky, A Rouge, A Rumpf, M Tanaka, R Videau, H Candlin, DJ Veitch, E Parrini, G Corden, M Georgiopoulos, C Ikeda, M Lannutti, J Levinthal, D Mermikides, M Sawyer, L Antonelli, A Baldini, R Bencivenni, G Bologna, G Campana, P Capon, G Cerutti, F Chiarella, V D'Ettorre-Piazzoli, B Felici, G Laurelli, P Mannocchi, G Murtas, F Murtas, GP Nicoletti, G Passalacqua, L Pepe-Altarelli, M Picchi, P Zografou, P Altoon, B Boyle, O Halley, AW ten Have, I Hearns, JL Lynch, JG Morton, WT Raine, C Scarr, JM Smith, K Thompson, AS Turnbull, RM Brandl, B Braun, O Geiges, R Geweniger, C Hanke, P Hepp, V Kluge, EE Maumary, Y Putzer, A Rensch, B Stahl, A Tittel, K Wunsch, M Belk, AT Beuselinck, R Binnie, DM Cameron, W Cattaneo, M Dornan, PJ Dugeay, S Greene, AM Hassard, JF Lieske, NM Patton, SJ Payne, DG Phillips, MJ Sedgbeer, JK Taylor, G Tomalin, IR Wright, AG Girtler, P Kuhn, D Rudolph, G Bowdery, CK Brodbeck, TJ Finch, AJ Foster, F Hughes, G Keemer, NR Nuttall, M Patel, A Rowlingson, BS Sloan, T Snow, SW Whelan, EP Barczewski, T Kleinknecht, K Raab, J Renk, B Roehn, S Sander, HG Schmelling, M Schmidt, H Steeg, F Walther, SM Wolf, B Albanese, JP Aubert, JJ Benchouk, C Bernard, V Bonissent, A Courvoisier, D Etienne, F Papalexiou, S Payre, P Pietrzyk, B Qian, Z Becket, H Blum, W Cattaneo, P Cowan, G Dehning, B Dietl, H Dydak, F Fernandez-Bosman, M Hansl-Kozanecka, T Jahn, A Kozanecki, W Lange, E Lauber, J Lutjens, G Lutz, G Manner, W Pan, Y Richter, R Schroder, J Schwarz, AS Settles, R Stierlin, U Thomas, J Wolf, G Bertin, V Boucrot, J Callot, O Chen, X Cordier, A Davier, M Ganis, G Grivaz, JF Heusse, P Janot, P Kim, DW Le Diberder, F Lefrancois, J Lutz, AM Veillet, JJ Videau, I Zhang, Z Zomer, F Abbaneo, D Amendolia, SR Bagliesi, G Batignani, G Bosisio, L Bottigli, U Bradaschia, C Carpinelli, M Ciocci, MA Dell'Orso, R Ferrante, I Fidecaro, F Foa, L Focardi, E Forti, F Gatto, C Giassi, A Giorgi, MA Ligabue, F Mannelli, EB Marrocchesi, PS Messineo, A Moneta, L Palla, F Sanguinetti, G Steinberger, J Tenchini, R Tonelli, G Triggiani, G Vannini, C Venturi, A Verdini, PG Walsh, J Carter, JM Green, MG March, PV Medcalf, T Quazi, IS Strong, JA Thomas, RM West, LR Wildish, T Botterill, DR Clift, RW Edgecock, TR Edwards, M Fisher, SM Jones, TJ Norton, PR Salmon, DP Thompson, JC Bloch-Devaux, B Colas, P Klopfenstein, C Locci, E Loucatos, S Monnier, E Perez, P Perlas, JA Pettier, F Rander, J Renardy, JF Roussarie, A Schuller, JP Schwindling, J Vallage, B Ashman, JG Booth, CN Buttar, C Carney, R Cartwright, S Combley, F Dinsdale, M Dogru, M Hatfield, F Martin, J Parker, D Reeves, P Thomson, LF Barberio, E Brandt, S Burkhardt, H Grupen, C Meinhard, H Mirabito, L Schaifer, U Seywerd, H Apollinari, G Giannini, G Gobbo, B Liello, F Ragusa, F Rolandi, L Stiegler, U Bellantoni, L Chen, X Cinabro, D Conway, JS Cowen, DF Feng, Z Ferguson, DPS Gao, YS Grahl, J Harton, JL Jacobsen, JE Jared, RC Johnson, RP Le Claire, BW Pan, YB Pater, JR Saadi, Y Sharma, V Shi, ZH Tang, YH Walsh, AM Wear, JA Weber, FV Whitney, MH Wu, SL Zobernig, G ABREU, P Adam, W Adami, F Adye, T Akesson, T Alekseev, GD Allen, P Almehed, S Alted, F Alvsvaag, SJ Amaldi, U Anassontzis, EG Antilogus, P Apel, WD Asman, B Astier, P Augustin, JE Augustinus, A Baillon, P Bambade, P Barao, F Barbiellini, G Bardin, DY Baroncelli, A Barring, O Bartl, W Battaglia, M Bates, MJ Baubillier, M Becks, KH Beeston, CJ Begalli, M Beilliere, P Belokopytov, YA Beltran, P Benedic, D Benlloch, JM Berggren, M Bertrand, D Biagi, SF Bianchi, F Bibby, JH Bilenky, SM Billoir, P Belokopytov, YA Beltran, P Benedic, D Benlloch, JM Berggren, M Bertrand, D Biagi, SF Bianchi, F Bibby, JH Bilenky, SM Billoir, P Bjarne, J Bloch, D Blyth, S Bogolubov, PN Bolognese, T Bonapart, M Bonesini, M Bonivento, W Booth, PSL Boratav, M Borgeaud, P Borisov, G Borner, H Bosio, C Botner, O Bouquet, B Bozzo, M Braibant, S Branchini, P Brand, KD Brenner, RA Bricman, C Brown, RCA Brummer, N Brunet, JM Bugge, L Buran, T Burmeister, H Buytaert, J Caccia, M Calvi, M Camacho-Rozas, AJ Campagne, JE Campion, A Camporesi, T Canale, V Cao, F Carroll, L Caso, C Castelli, E Castillo-Gimenez, MV Cattai, A Cavallo, FR Cerrito, L Chapkin, MM Charpentier, P Checchia, P Chelkov, GA Chevalier, L Chliapnikov, PV Chorowicz, V Cirio, R Clara, MP Collins, P Contreras, JL Contri, R Cosme, G Couchot, F Crawley, HB Crennell, DJ Crosetti, G Crosland, N Crozon, M Cuevas-Maestro, J Czellar, S Dagoret, S Dahl-Jensen, E D'Almagne, B Dam, M Damgaard, G Darbo, G Daubie, E Dauncey, PD Davenport, M David, P De Angelis, A De Beer, M De Boeck, H de Boer, W De Clercq, C De Fez Laso, MDM De Groot, N de La Vaissiere, C De Lotto, B Defoix, C Delikaris, D Delorme, S Delpierre, PA Demaria, N Demin, A Derkaoui, JE Di Ciaccio, L Dijkstra, H Djama, F Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J Dris, M Dufour, Y Dulinski, W Dzhelyadin, RI Eek, L Eerola, PAM Ekelof, TJC Ekspong, G Elliot-Peisert, A Engel, JP Fassouliotis, D Fernandez-Alonso, M Ferrer, A Filippas-Tassos, A Firestone, A Foth, H Fokitis, E Folegati, P Fontanelli, F Forsbach, H Franek, BJ Frenkiel, P Fries, DEC Frodesen, AG Fruhwirth, R Fulda-Quenzer, F Furnival, K Furstenau, H Fuster, JA Gago, JM Galeazzi, G Gamba, D Garcia, C Garcia, J Gasparini, U Gavillet, P Gazis, EN Gerber, JP Giacomelli, P Glitza, KW Gokieli, R Golovatyuk, VM Gomez-Cadenas, JJ Goobar, A Gopal, GP Gian, P Gorski, M Gracco, V Grant, A Grard, F Graziani, E Gros, MH Grosdidier, G Grossetete, B Gumenyuk, SA Guy, J Hahn, F Hahn, M Haider, S Hajduk, Z Hakansson, A Hallgren, A Hamacher, K Hamel de Monchenault, G Harris, FJ Heck, BW Herbst, I Hernandez, JJ Herquet, P Herr, H Hietanen, I Higon, E Hilke, HJ Hodgson, SD Hofmokl, T Holmes, R Holmgren, SO Holthuizen, DJ Honore, PF Hooper, JE Houlden, MA Hrubec, J Hulth, PO Hultqvist, K Husson, D Hyams, BD Ioannou, P Isenhower, D Iversen, PS Jackson, JN Jalocha, P Jarlskog, G Jarry, P Jean-Marie, B Johansson, EK Johnsson, D Jonker, M Jonsson, LB Juillot, P Kalkanis, G Kalmus, GE Kantardjian, G Kapusta, F Kapusta, P Katsanevas, S Katsoufis, EC Keranen, R Kesteman, J Khomenko, BA Khovanskii, NN King, BJ Kjaer, NJ Klein, H Klempt, W Klovning, A Kluit, PM Kohne, JH Kone, B Kokkinias, P Kopf, M Koratzinos, M Korcyl, K Korytov, AV Korzen, B Kostukhin, V Kourkoumelis, C Kreuzberger, T Krolikowski, J Kruner-Marquis, U Krupinski, W Kucewicz, W Kulka, K Kurvinen, KL Lacasta, C Lambropoulos, C Lamsa, J Lanceri, L Lapin, V Laugier, JP Lauhakangas, R Leder, G Ledroit, F Lemonne, J Lenzen, G Lepeltier, V Letessier-Selvon, AA Liko, D Lieb, EH Lillethun, E Lindgren, J Lipniacka, A Lippi, I Llosa, R Lorstad, B Lokajicek, M Loken, JG Lopez-Aguera, MA Lopez-Fernandez, A Los, ME Loukas, D Lounis, A Lozano-Bahilo, J Lucock, R Lutz, P Lyons, L Maehlum, G Maillard, J Maltezos, A Maltezos, S Mandl, F Marco, J Margoni, M Marin, JC Markou, A Mathis, LG Matorras, F Matteuzzi, C Matthiae, G Mazzucato, M McCubbin, ML McKay, R McNulty, R Menichetti, E Meola, G Meroni, C Meyer, WT Michelotto, M Mitaroff, WA Mitselmakher, G Mjornmark, U Moa, T Moller, R Monig, K Monge, MR Morettini, P Murray, WJ Myatt, G Naraghi, F Nau-Korzen, U Navarria, FL Negri, P Nielsen, BS Nijjhar, B Nikolaenko, V Obraztsov, VF Olshevskii, AG Orava, R Ostankov, AP Ouraou, A Pain, R Palka, H Papadopoulou, TD Pape, L Passeri, A Pegoraro, M Perevozchikov, V Pernicka, M Perrotta, A Pierre, F Pimenta, M Pingot, O Pinsent, AC Pol, ME Polok, G Poropat, P Privitera, P Pullia, A Pyyhtia, J Radojicic, D Ragazzi, S Range, WH Ratoff, PN Read, AL Redaelli, NG Regler, M Reid, D Renton, PB Resvanis, LK Richard, F Richardson, M Ridky, J Rinaudo, G Roditi, I Romero, A Roncagliolo, I Ronchese, P Ronnqvist, C Rosenberg, EI Rossi, U Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W Ruhlmann, V Ruiz, A Rybicki, K Saarikko, H Sacquin, Y Salt, J Sanchez, E Sanchez, J Sannino, M Schaffer, M Schneider, H Scuri, F Segar, AM Sekulin, RL Sessa, MI Sette, G Seufert, R Shellard, RC Siegrist, P Simonetti, S Simonetto, F Sissakian, AN Skaali, TB Skjevling, G Smadja, G Smith, GR Smirnov, N Sosnowski, R Spassoff, T Spiriti, E Squarcia, S Stack, H Stanescu, C Stavropoulos, GD Stichelbaut, F Stocchi, A Strauss, J Strub, R Stubenrauch, CJ Szczekowski, M Szeptycka, M Szymanski, P Tabarelli de Fatis, T Tavernier, S Chikilev, OG Theodosiou, GE Tilquin, A Timmermans, J Timofeev, VG Tkatchev, LG Todorov, T Toet, DZ Tortora, L Trainor, MT Treille, D Trevisan, U Trischuk, W Tristram, G Troncon, C Tsirou, AL Tsyganov, EN Turala, M Turchetta, R Turluer, ML Tuuva, T Tyapkin, IA Tyndel, M Tzamarias, S Uberschar, B Uberschar, S Ullaland, O Uvarov, V Valenti, G Vallazza, E Valls Ferrer, JA van Apeldoorn, GW van Dam, P Van Doninck, WK van Eijndhoven, N Van der Velde, C Varela, J Vaz, P Vegni, G Velasco, J Ventura, L Venus, WA Verbeure, F Vertogradov, LS Vibert, L Vilanova, D Vlasov, EV Vodopyanov, AS Vollmer, M Volponi, S Voulgaris, G Voutilainen, M Vrba, V Wahlen, H Walck, C Waldner, F Wayne, M Weilhammer, P Werner, J Wetherell, AM Wickens, JH Wikne, J Wilkinson, GR Williams, WSC Winter, M Wormald, D Wormser, G Woschnagg, K Yamdagni, N Yepes, P Zaitsev, A Zalewska-Bak, A Zalewski, P Zevgolatakos, E Zhang, G Zimin, NI Zito, M Zitoun, R Zukanovich-Funchal, R Zumerle, G Zuniga, J ADEVA, B Adriani, O Aguilar-Benitez, M Akbari, H Alcaraz, J Aloisio, A Alverson, G Alviggi, MG An, Q Anderhub, H Anderson, AL Andreev, VP Angelov, T Antonov, L Antreasyan, D Arce, P Arefev, A Azemoon, T Aziz, T Baba, PVKS Bagnaia, P Bakken, JA Baksay, L Ball, RC Banerjee, S Bao, J Barone, L Bay, A Becker, U Behrens, J Beingessner, S Bencze, GL Berdugo, J Berges, P Bertucci, B Betev, BL Biland, A Bizzarri, R Blaising, JJ Bloemeke, P Blumenfeld, B Bobbink, GJ Bocciolini, M Boeck, RK Boehm, A Borgia, B Bourilkov, D Bourquin, M Boutigny, D Bouwens, BT Branson, JG Brock, IC Bruyant, F Buisson, C Bujak, A Burger, JD Burq, JP Busenitz, J Cai, XD Capell, M Carbonara, F Cardenal, F Carminati, P Catacci, AM Cerrada, M Cesaroni, F Chang, YH Chaturvedi, UK Chemarin, M Chen, A Chen, C Chen, GM Chen, HF Chen, HS Chen, M Chen, ML Chen, WY Chiefari, G Chien, CY Chollet, F Civinini, C Clare, I Clare, R Cohn, HO Coignet, G Colino, N Commichau, V Conforto, G Contin, A Crijns, F Criscuolo, P Cui, XY Dai, TS D'Alessandro, R de Asmundis, R Degre, A Deiters, K Denes, P de Notaristefani, F Dhina, M DiBitonto, D Diemoz, M Diez Hedo, F Dimitrov, HR Dionisi, C Divia, R Dova, MT Drago, E Driever, T Duchesneau, D Duinker, P Duran, I El-Mamouni, H Engler, A Eppling, FJ Erne, FC Extermann, P Fabbretti, R Faber, G Fabre, M Falciano, S Fan, Q Fan, SJ Fackler, O Fay, J Fehlmann, J Ferguson, T Fernandez, G Ferroni, F Fesefeldt, H Field, J Filthaut, F Finocchiaro, G Fisher, PH Forconi, G Foreman, T Freudenreich, K Friebel, W Fukushima, M Gailloud, M Galaktionov, Y Gallo, E Ganguli, SN Garcia-Abia, P Gau, SS Gele, D Gentile, S Glaubman, M Goldfarb, S Gong, ZF Gonzalez, E Gordeev, A Goettlicher, P Goujon, D Gratta, G Grinnell, C Gruenewald, MW Guanziroli, M Guo, JK Gurtu, H Gustafson, R Gutay, LJ Haan, H Hasan, A Hauschildt, D He, CF Hebbeker, T Hebert, M Herten, G Herten, U Herve, A Hilgers, K Hofer, H Hoorani, H Hsu, LS Hu, G Hu, GQ Ille, B Ilyas, MM Innocente, V Isiksal, E Janssen, H Jin, BN Jones, LW Kasser, A Khan, RA Kamyshkov, Y Karyotakis, Y Kaur, M Khokhar, S Khoze, V Kienzle-Focacci, MN Kinnison, WW Kirkby, D Kittel, W Klimentov, A Koenig, AC Kornadt, O Koutsenko, V Kraemer, RW Kramer, T Krastev, VR Krenz, W Krizmanic, JF Kumar, KS Kumar, V Kunin, A Lalieu, V Landi, G Lanske, D Lanzano, S Lebrun, P Lecomte, P Lecoq, P Le Coultre, P Lee, D Leedom, I Le Goff, JM Leistam, L Leiste, R Lenti, M Leonardi, E Lettry, J Levchenko, PM Leytens, X Li, C Li, HT Li, JF Li, L Li, PJ Li, Q Li, XG Liao, JY Lin, ZY Linde, FL Lindemann, B Linnhoefer, D Liu, R Liu, Y Lohmann, W Longo, E Lu, YS Lubbers, JM Luebelsmeyer, K Luci, C Luckey, D Ludovici, L Lue, X Luminari, L Ma, WG MacDermott, M Magahiz, R Maire, M Malhotra, K Malik, R Malinin, A Mana, C Mao, DN Mao, YF Maolinbay, M Marchesini, P Marchionni, A Martin, B Martinez-Lazo, L Marzano, F Massaro, GGG Matsuda, T Mazumdar, K McBride, P McMahon, T McNally, D Meinholz, T Merk, M Merola, L Meschini, M Metzger, WJ Mi, Y Mills, GB Mir, Y Mirabelli, G Mnich, J Moeller, M Monteleoni, B Morand, G Morand, R Morganti, S Moulai, NE Mount, R Mueller, S Nagy, E Napolitano, M Newman, H Never, C Niaz, MA Niessen, L Nowak, H Pandoulas, D Plasil, F Passaleva, G Paternoster, G Patricelli, S Pei, YJ Perret-Galliz, D Perrier, J Pevsner, A Pieri, M Piccolo, D Piroue, PA Plyaskin, V Pohl, M Pozhidaev, V Produit, N Qian, JM Quershi, KN Raghavan, R Rahal-Callot, G Razis, P Read, K Ren, D Ren, Z Reucroft, S Ricker, A Riemann, S Rind, O Rippich, C Rizvi, HA Roe, BP Roehner, M Roehner, S Roeser, U Romero, L Rose, J Rosier-Lees, S Rosmalen, R Rosselet, P Rubbia, C Rubio, JA Rubio, M Ruckstuhl, W Rykaczewski, H Sachwitz, M Salicio, J Salicio, JM Sanders, G Sarakinos, ME Sartorelli, G Sauvage, G Savin, A Shchegelskii, V Schmiiemann, K Schmitz, D Schmitz, P Schneegans, M Schopper, H Schotanus, DJ Shotkin, S Schreiber, HJ Schulte, R Schulte, S Schultze, K Schuette, J Schwenke, J Schwering, G Sciacca, C Scott, I Sehgal, R Seiler, PG Sens, JC Sheer, I Shen, DZ Shevchenko, V Shevchenko, S Shi, XR Shmakov, K Shoutko, V Shumilov, E Smirnov, N Soederstroem, E Sopczak, A Spartiotis, C Spickermann, T Spiess, B Spillantini, P Starosta, R Steuer, M Stickland, DP Sticozzi, F Stoeffl, W Stone, H Strauch, K Stringfellow, BC Sudhakar, K Sultanov, GG Sumner, RL Sun, LZ Suter, H Sutton, RB Swain, JD Syed, AA Tang, XW Tarkovsky, E Taylor, L Timmermans, C Ting, SCC Ting, SM Tong, YP Tonisch, F Tonutti, M Tonwar, SC Toth, J Trowitzsch, G Tully, C Tung, KL Ulbricht, J Urban, L Uwer, U Valenta, E Van de Walle, RT Vetlitskii, I Viertel, G Vikas, U Vivargent, M Vogel, H Vogt, H von Dardel, G Vorobev, I Vorobyov, AA Vuilleumier, L Wadhwa, M Wallraff, W Wang, CR Wang, CR Wang, GH Wang, JH Wang, QF Wang, XL Wang, YF Wang, Z Wang, ZM Weber, A Weber, J Weill, R Wenaus, J Wenninger, J White, M Willmott, C Wittgenstein, F Wright, D Wu, RJ Wu, SL Wu, SX Wu, YG Wyslouch, B Xie, YY Xu, YD Xu, ZZ Xue, ZL Yan, DS Yan, XJ Yang, BZ Yang, CG Yang, G Yang, KS Yang, QY Ye, CH Ye, JB Ye, Q Yeh, SC Yin, ZW You, JM Yzerman, M Zaccardelli, C Zehnder, L Zemp, P Zeng, M Zeng, Y Zhang, DH Zhang, ZP Zhou, JF Zhu, RY Zhuang, HL Zichichi, A Alexander, G Allison, J Allport, PP Anderson, KJ Arcelli, S Armitage, JC Ashton, P Astbury, A Axen, D Azuelos, G Bahan, GA Baines, JTM Ball, AH Banks, J Barker, GJ Barlow, RJ Batley, JR Beaudoin, G Beck, A Becker, J Behnke, T Bell, KW Bella, G Betheke, S Biebel, O Binder, U Bloodworth, IJ Bock, P Bosch, HM Bougerolle, S Brabson, B Breuker, H Brown, RM Brun, R Buijs, A Burckhart, HJ Capiluppi, P Carnegie, RK Carter, AA Carter, JR Chang, CY Charlton, DG Chrin, JTM Clarke, PEL Cohen, I Collins, WJ Conboy, JE Cooper, M Couch, M Coupland, M Cuffiani, M Dado, S Dallavalle, M De Jong, S Debu, P Deninno, MM Dieckmann, A Dittmar, M Dizit, MS Duchovni, E Duckeck, G Duerdoth, IP Dumas, DJP Eckerlin, G Elxombe, PA Estabrooks, PG Etzion, E Fabbri, FL Fincke-Keeler, M Fischer, HM Fong, DG Fukunaga, C Gaidot, A Ganel, O Gary, JW Gascon, J McGowan, RF Geddes, NI Geich-Gimbel, C Gensler, MW Gentit, FX Giacomelli, G Gibson, V Gibson, WR Gilles, JD Goldberg, J Goodrick, MJ Gorn, W Grandi, C Gross, E Hagemann, J Hanson, GG Hansroul, M Hargrove, CK Harrison, PF Hart, J Hattersley, PM Hauschild, M Hawkes, CM Heflin, E Hemingway, RJ Heuer, RD Hill, JC Hillier, SJ Hinshaw, DA Ho, C Hobbs, JD Hobson, RR Hochman, D Holl, B Homer, RJ Hou, SR Howarth, CP Humbert, R Hughes-Jones, RE Igo-Kemenes, P Ihssen, H Imrie, DC Janissen, L Jawahery, A Jeffreys, PW Jeremie, H Jimack, M Jobes, M Jones, RWL Jovanovic, P Karlen, D Kawagoe, K Kawamoto, T Keeler, RK Kellogg, RG Kennedy, BW Kleinwort, C Klem, DE Kobayashi, T Kokott, TP Komamiva, S Koepke, L Kowalewski, R Kreutzmann, H Von Krogh, J Kroll, J Kuwano, M Kyberd, P Lafferty, GD Lamarche, F Larson, WJ Lavter, JG Le Du, P Leblanc, P Lee, AM Lehto, MH Lellouch, D Lennert, P Leroy, C Lessard, ML Levegruen, S Levinson, L Lloyd, SL Loebinger, FK Lorah, JM Lorazo, B Losty, MJ Lou, XC Ludwig, J Mannelli, M Marcellini, S Maringer, G Martin, AJ Martin, JP Mashimo, T Maettig, P Maur, U McMahon, TJ McNutt, JR Meijers, F Menszner, D Merritt, FS Mes, H Michelini, A Middleton, RP Mikenberg, G Mildenberger, J Miller, DJ Milstene, C Mir, R Mohr, W Moisan, C Montanari, A Mori, T Moss, MW Mouthuy, T Murphy, PG Nellen, B Nguyen, HH Nozaki, M O'Neale, SW O'Neill, BP Oakham, FG Odorici, F Ogg, M Ogren, HO Oh, JH Oram, CJ Oreglia, MJ Orito, S Pansart, JP Panzer-Steindel, B Paschievici, P Patrick, GN Pawley, SJ Pfister, P Pilcher, JE Pinfold, JL Plane, DE Poffenberger, PR Poli, B Pouladdej, A Prebys, E Pritchard, W Przysiezniak, H Quast, Q Redmond, MW Rees, DL Riles, K Robins, SA Robinson, D Rollnik, A Roney, JM Rossberg, S Rossi, AM Routenburg, P Runge, K Runolfsson, O Rust, DR Sanghera, S Sasaki, M Schaile, AD Schappert, W Scharff-Hansen, P Schenk, P Von der Schmitt, H Schreiber, S Schwarz, J Scott, WG Settles, M Shen, BC Sherwood, P Shypit, R Simon, A Singh, P Siroli, GP Skuja, A Smith, AM Smith, TJ Snow, GA Sobie, RJ Springer, RW Sproston, M Stephens, K Stier, HE Strom, D Takeda, H Takeshita, T Taras, P Tarem, S Teixeira-Dias, P Thackray, NJ Tsukamoto, T Turner, MF Tysarczyk-Niemeyer, G Van den plas, D Van Kooten, R VanDalen, GJ Vasseur, G Virtue, CJ Wagner, A Wahl, C Walker, JP Ward, CP Ward, DR Watkins, PM Watson, AT Watson, NK Weber, M Weisz, S Wells, PS Wermes, N Weymann, M Whalley, MA Wilson, GW Wilson, JA Wingerter, I Winterer, VH Wood, NC Wotten, SA Wyatt, TR Yaari, R Yang, Y Yekutieli, G Zacharov, I Zeuner, W Zorn, GT AF DECAMP, D Deschizeaux, B Goy, C Lees, JP Minard, MN Alemany, R Crespo, JM Delfino, M Fernandez, E Gaitan, V Garrido, LI Mir, LLM Pacheco, A Catanesi, MG Creanza, D de Palma, M Farilla, A Iaselli, G Maggi, G Maggi, M Natali, S Nuzzo, S Quattromini, M Ranieri, A Raso, G Romano, F Ruggieri, F Selvaggi, G Silvestris, L Tempesta, P Zito, G Gao, Y Hu, H Huang, D Huang, X Lin, J Lou, J Qiao, C Ruan, T Wang, T Xie, Y Xu, D Xu, R Zhang, J Zhao, W Atwood, WB Bauerdick, LAT Bird, F Blucher, E Bonvicini, G Bossi, F Boudreau, J Brown, D Burnett, TH Drevermann, H Forty, RW Grab, C Hagelberg, R Haywood, S Hilgart, J Jost, B Kasemann, M Knobloch, J Lacourt, A Lancon, E Lehraus, I Lohse, T Lusiani, A Marchioro, A Martinez, M Mato, P Menary, S Minten, A Miotto, A Miquel, R Moser, HG Nash, J Palazzi, P Ranjard, F Redlinger, G Roth, A Rothberg, J Rotscheidt, H Saich, M St Denis, R Schlatter, D Takashima, M Talby, M Tejessy, W Wachsmuth, H Wasserbaech, S Wheeler, S Wiedenmann, W Witzeling, W Wotschack, J Ajaltouni, Z Bardadin-Otwinowska, M El Fellous, R Falvard, A Gay, P Harvey, J Henrard, P Jousset, J Michel, B Montret, JC Pallin, D Perret, P Proriol, J Prulhiere, F Stimpfl, G Hansen, JD Hansen, JR Hansen, PH Mollerud, R Nilsson, BS Efthymiopoulos, I Simopoulou, E Vayaki, A Badier, J Blondel, A Bonneaud, G Bourotte, J Braems, F Brient, JC Fouque, G Gamess, A Guirlet, R Orteu, S Rosowsky, A Rouge, A Rumpf, M Tanaka, R Videau, H Candlin, DJ Veitch, E Parrini, G Corden, M Georgiopoulos, C Ikeda, M Lannutti, J Levinthal, D Mermikides, M Sawyer, L Antonelli, A Baldini, R Bencivenni, G Bologna, G Campana, P Capon, G Cerutti, F Chiarella, V D'Ettorre-Piazzoli, B Felici, G Laurelli, P Mannocchi, G Murtas, F Murtas, GP Nicoletti, G Passalacqua, L Pepe-Altarelli, M Picchi, P Zografou, P Altoon, B Boyle, O Halley, AW ten Have, I Hearns, JL Lynch, JG Morton, WT Raine, C Scarr, JM Smith, K Thompson, AS Turnbull, RM Brandl, B Braun, O Geiges, R Geweniger, C Hanke, P Hepp, V Kluge, EE Maumary, Y Putzer, A Rensch, B Stahl, A Tittel, K Wunsch, M Belk, AT Beuselinck, R Binnie, DM Cameron, W Cattaneo, M Dornan, PJ Dugeay, S Greene, AM Hassard, JF Lieske, NM Patton, SJ Payne, DG Phillips, MJ Sedgbeer, JK Taylor, G Tomalin, IR Wright, AG Girtler, P Kuhn, D Rudolph, G Bowdery, CK Brodbeck, TJ Finch, AJ Foster, F Hughes, G Keemer, NR Nuttall, M Patel, A Rowlingson, BS Sloan, T Snow, SW Whelan, EP Barczewski, T Kleinknecht, K Raab, J Renk, B Roehn, S Sander, HG Schmelling, M Schmidt, H Steeg, F Walther, SM Wolf, B Albanese, JP Aubert, JJ Benchouk, C Bernard, V Bonissent, A Courvoisier, D Etienne, F Papalexiou, S Payre, P Pietrzyk, B Qian, Z Becket, H Blum, W Cattaneo, P Cowan, G Dehning, B Dietl, H Dydak, F Fernandez-Bosman, M Hansl-Kozanecka, T Jahn, A Kozanecki, W Lange, E Lauber, J Lutjens, G Lutz, G Manner, W Pan, Y Richter, R Schroder, J Schwarz, AS Settles, R Stierlin, U Thomas, J Wolf, G Bertin, V Boucrot, J Callot, O Chen, X Cordier, A Davier, M Ganis, G Grivaz, JF Heusse, P Janot, P Kim, DW Le Diberder, F Lefrancois, J Lutz, AM Veillet, JJ Videau, I Zhang, Z Zomer, F Abbaneo, D Amendolia, SR Bagliesi, G Batignani, G Bosisio, L Bottigli, U Bradaschia, C Carpinelli, M Ciocci, MA Dell'Orso, R Ferrante, I Fidecaro, F Foa, L Focardi, E Forti, F Gatto, C Giassi, A Giorgi, MA Ligabue, F Mannelli, EB Marrocchesi, PS Messineo, A Moneta, L Palla, F Sanguinetti, G Steinberger, J Tenchini, R Tonelli, G Triggiani, G Vannini, C Venturi, A Verdini, PG Walsh, J Carter, JM Green, MG March, PV Medcalf, T Quazi, IS Strong, JA Thomas, RM West, LR Wildish, T Botterill, DR Clift, RW Edgecock, TR Edwards, M Fisher, SM Jones, TJ Norton, PR Salmon, DP Thompson, JC Bloch-Devaux, B Colas, P Klopfenstein, C Locci, E Loucatos, S Monnier, E Perez, P Perlas, JA Pettier, F Rander, J Renardy, JF Roussarie, A Schuller, JP Schwindling, J Vallage, B Ashman, JG Booth, CN Buttar, C Carney, R Cartwright, S Combley, F Dinsdale, M Dogru, M Hatfield, F Martin, J Parker, D Reeves, P Thomson, LF Barberio, E Brandt, S Burkhardt, H Grupen, C Meinhard, H Mirabito, L Schaifer, U Seywerd, H Apollinari, G Giannini, G Gobbo, B Liello, F Ragusa, F Rolandi, L Stiegler, U Bellantoni, L Chen, X Cinabro, D Conway, JS Cowen, DF Feng, Z Ferguson, DPS Gao, YS Grahl, J Harton, JL Jacobsen, JE Jared, RC Johnson, RP Le Claire, BW Pan, YB Pater, JR Saadi, Y Sharma, V Shi, ZH Tang, YH Walsh, AM Wear, JA Weber, FV Whitney, MH Wu, SL Zobernig, G ABREU, P Adam, W Adami, F Adye, T Akesson, T Alekseev, GD Allen, P Almehed, S Alted, F Alvsvaag, SJ Amaldi, U Anassontzis, EG Antilogus, P Apel, WD Asman, B Astier, P Augustin, JE Augustinus, A Baillon, P Bambade, P Barao, F Barbiellini, G Bardin, DY Baroncelli, A Barring, O Bartl, W Battaglia, M Bates, MJ Baubillier, M Becks, KH Beeston, CJ Begalli, M Beilliere, P Belokopytov, YA Beltran, P Benedic, D Benlloch, JM Berggren, M Bertrand, D Biagi, SF Bianchi, F Bibby, JH Bilenky, SM Billoir, P Belokopytov, YA Beltran, P Benedic, D Benlloch, JM Berggren, M Bertrand, D Biagi, SF Bianchi, F Bibby, JH Bilenky, SM Billoir, P Bjarne, J Bloch, D Blyth, S Bogolubov, PN Bolognese, T Bonapart, M Bonesini, M Bonivento, W Booth, PSL Boratav, M Borgeaud, P Borisov, G Borner, H Bosio, C Botner, O Bouquet, B Bozzo, M Braibant, S Branchini, P Brand, KD Brenner, RA Bricman, C Brown, RCA Brummer, N Brunet, JM Bugge, L Buran, T Burmeister, H Buytaert, J Caccia, M Calvi, M Camacho-Rozas, AJ Campagne, JE Campion, A Camporesi, T Canale, V Cao, F Carroll, L Caso, C Castelli, E Castillo-Gimenez, MV Cattai, A Cavallo, FR Cerrito, L Chapkin, MM Charpentier, P Checchia, P Chelkov, GA Chevalier, L Chliapnikov, PV Chorowicz, V Cirio, R Clara, MP Collins, P Contreras, JL Contri, R Cosme, G Couchot, F Crawley, HB Crennell, DJ Crosetti, G Crosland, N Crozon, M Cuevas-Maestro, J Czellar, S Dagoret, S Dahl-Jensen, E D'Almagne, B Dam, M Damgaard, G Darbo, G Daubie, E Dauncey, PD Davenport, M David, P De Angelis, A De Beer, M De Boeck, H de Boer, W De Clercq, C De Fez Laso, MDM De Groot, N de La Vaissiere, C De Lotto, B Defoix, C Delikaris, D Delorme, S Delpierre, PA Demaria, N Demin, A Derkaoui, JE Di Ciaccio, L Dijkstra, H Djama, F Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J Dris, M Dufour, Y Dulinski, W Dzhelyadin, RI Eek, L Eerola, PAM Ekelof, TJC Ekspong, G Elliot-Peisert, A Engel, JP Fassouliotis, D Fernandez-Alonso, M Ferrer, A Filippas-Tassos, A Firestone, A Foth, H Fokitis, E Folegati, P Fontanelli, F Forsbach, H Franek, BJ Frenkiel, P Fries, DEC Frodesen, AG Fruhwirth, R Fulda-Quenzer, F Furnival, K Furstenau, H Fuster, JA Gago, JM Galeazzi, G Gamba, D Garcia, C Garcia, J Gasparini, U Gavillet, P Gazis, EN Gerber, JP Giacomelli, P Glitza, KW Gokieli, R Golovatyuk, VM Gomez-Cadenas, JJ Goobar, A Gopal, GP Gian, P Gorski, M Gracco, V Grant, A Grard, F Graziani, E Gros, MH Grosdidier, G Grossetete, B Gumenyuk, SA Guy, J Hahn, F Hahn, M Haider, S Hajduk, Z Hakansson, A Hallgren, A Hamacher, K Hamel de Monchenault, G Harris, FJ Heck, BW Herbst, I Hernandez, JJ Herquet, P Herr, H Hietanen, I Higon, E Hilke, HJ Hodgson, SD Hofmokl, T Holmes, R Holmgren, SO Holthuizen, DJ Honore, PF Hooper, JE Houlden, MA Hrubec, J Hulth, PO Hultqvist, K Husson, D Hyams, BD Ioannou, P Isenhower, D Iversen, PS Jackson, JN Jalocha, P Jarlskog, G Jarry, P Jean-Marie, B Johansson, EK Johnsson, D Jonker, M Jonsson, LB Juillot, P Kalkanis, G Kalmus, GE Kantardjian, G Kapusta, F Kapusta, P Katsanevas, S Katsoufis, EC Keranen, R Kesteman, J Khomenko, BA Khovanskii, NN King, BJ Kjaer, NJ Klein, H Klempt, W Klovning, A Kluit, PM Kohne, JH Kone, B Kokkinias, P Kopf, M Koratzinos, M Korcyl, K Korytov, AV Korzen, B Kostukhin, V Kourkoumelis, C Kreuzberger, T Krolikowski, J Kruner-Marquis, U Krupinski, W Kucewicz, W Kulka, K Kurvinen, KL Lacasta, C Lambropoulos, C Lamsa, J Lanceri, L Lapin, V Laugier, JP Lauhakangas, R Leder, G Ledroit, F Lemonne, J Lenzen, G Lepeltier, V Letessier-Selvon, AA Liko, D Lieb, EH Lillethun, E Lindgren, J Lipniacka, A Lippi, I Llosa, R Lorstad, B Lokajicek, M Loken, JG Lopez-Aguera, MA Lopez-Fernandez, A Los, ME Loukas, D Lounis, A Lozano-Bahilo, J Lucock, R Lutz, P Lyons, L Maehlum, G Maillard, J Maltezos, A Maltezos, S Mandl, F Marco, J Margoni, M Marin, JC Markou, A Mathis, LG Matorras, F Matteuzzi, C Matthiae, G Mazzucato, M McCubbin, ML McKay, R McNulty, R Menichetti, E Meola, G Meroni, C Meyer, WT Michelotto, M Mitaroff, WA Mitselmakher, G Mjornmark, U Moa, T Moller, R Monig, K Monge, MR Morettini, P Murray, WJ Myatt, G Naraghi, F Nau-Korzen, U Navarria, FL Negri, P Nielsen, BS Nijjhar, B Nikolaenko, V Obraztsov, VF Olshevskii, AG Orava, R Ostankov, AP Ouraou, A Pain, R Palka, H Papadopoulou, TD Pape, L Passeri, A Pegoraro, M Perevozchikov, V Pernicka, M Perrotta, A Pierre, F Pimenta, M Pingot, O Pinsent, AC Pol, ME Polok, G Poropat, P Privitera, P Pullia, A Pyyhtia, J Radojicic, D Ragazzi, S Range, WH Ratoff, PN Read, AL Redaelli, NG Regler, M Reid, D Renton, PB Resvanis, LK Richard, F Richardson, M Ridky, J Rinaudo, G Roditi, I Romero, A Roncagliolo, I Ronchese, P Ronnqvist, C Rosenberg, EI Rossi, U Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W Ruhlmann, V Ruiz, A Rybicki, K Saarikko, H Sacquin, Y Salt, J Sanchez, E Sanchez, J Sannino, M Schaffer, M Schneider, H Scuri, F Segar, AM Sekulin, RL Sessa, MI Sette, G Seufert, R Shellard, RC Siegrist, P Simonetti, S Simonetto, F Sissakian, AN Skaali, TB Skjevling, G Smadja, G Smith, GR Smirnov, N Sosnowski, R Spassoff, T Spiriti, E Squarcia, S Stack, H Stanescu, C Stavropoulos, GD Stichelbaut, F Stocchi, A Strauss, J Strub, R Stubenrauch, CJ Szczekowski, M Szeptycka, M Szymanski, P Tabarelli de Fatis, T Tavernier, S Chikilev, OG Theodosiou, GE Tilquin, A Timmermans, J Timofeev, VG Tkatchev, LG Todorov, T Toet, DZ Tortora, L Trainor, MT Treille, D Trevisan, U Trischuk, W Tristram, G Troncon, C Tsirou, AL Tsyganov, EN Turala, M Turchetta, R Turluer, ML Tuuva, T Tyapkin, IA Tyndel, M Tzamarias, S Uberschar, B Uberschar, S Ullaland, O Uvarov, V Valenti, G Vallazza, E Valls Ferrer, JA van Apeldoorn, GW van Dam, P Van Doninck, WK van Eijndhoven, N Van der Velde, C Varela, J Vaz, P Vegni, G Velasco, J Ventura, L Venus, WA Verbeure, F Vertogradov, LS Vibert, L Vilanova, D Vlasov, EV Vodopyanov, AS Vollmer, M Volponi, S Voulgaris, G Voutilainen, M Vrba, V Wahlen, H Walck, C Waldner, F Wayne, M Weilhammer, P Werner, J Wetherell, AM Wickens, JH Wikne, J Wilkinson, GR Williams, WSC Winter, M Wormald, D Wormser, G Woschnagg, K Yamdagni, N Yepes, P Zaitsev, A Zalewska-Bak, A Zalewski, P Zevgolatakos, E Zhang, G Zimin, NI Zito, M Zitoun, R Zukanovich-Funchal, R Zumerle, G Zuniga, J ADEVA, B Adriani, O Aguilar-Benitez, M Akbari, H Alcaraz, J Aloisio, A Alverson, G Alviggi, MG An, Q Anderhub, H Anderson, AL Andreev, VP Angelov, T Antonov, L Antreasyan, D Arce, P Arefev, A Azemoon, T Aziz, T Baba, PVKS Bagnaia, P Bakken, JA Baksay, L Ball, RC Banerjee, S Bao, J Barone, L Bay, A Becker, U Behrens, J Beingessner, S Bencze, GL Berdugo, J Berges, P Bertucci, B Betev, BL Biland, A Bizzarri, R Blaising, JJ Bloemeke, P Blumenfeld, B Bobbink, GJ Bocciolini, M Boeck, RK Boehm, A Borgia, B Bourilkov, D Bourquin, M Boutigny, D Bouwens, BT Branson, JG Brock, IC Bruyant, F Buisson, C Bujak, A Burger, JD Burq, JP Busenitz, J Cai, XD Capell, M Carbonara, F Cardenal, F Carminati, P Catacci, AM Cerrada, M Cesaroni, F Chang, YH Chaturvedi, UK Chemarin, M Chen, A Chen, C Chen, GM Chen, HF Chen, HS Chen, M Chen, ML Chen, WY Chiefari, G Chien, CY Chollet, F Civinini, C Clare, I Clare, R Cohn, HO Coignet, G Colino, N Commichau, V Conforto, G Contin, A Crijns, F Criscuolo, P Cui, XY Dai, TS D'Alessandro, R de Asmundis, R Degre, A Deiters, K Denes, P de Notaristefani, F Dhina, M DiBitonto, D Diemoz, M Diez Hedo, F Dimitrov, HR Dionisi, C Divia, R Dova, MT Drago, E Driever, T Duchesneau, D Duinker, P Duran, I El-Mamouni, H Engler, A Eppling, FJ Erne, FC Extermann, P Fabbretti, R Faber, G Fabre, M Falciano, S Fan, Q Fan, SJ Fackler, O Fay, J Fehlmann, J Ferguson, T Fernandez, G Ferroni, F Fesefeldt, H Field, J Filthaut, F Finocchiaro, G Fisher, PH Forconi, G Foreman, T Freudenreich, K Friebel, W Fukushima, M Gailloud, M Galaktionov, Y Gallo, E Ganguli, SN Garcia-Abia, P Gau, SS Gele, D Gentile, S Glaubman, M Goldfarb, S Gong, ZF Gonzalez, E Gordeev, A Goettlicher, P Goujon, D Gratta, G Grinnell, C Gruenewald, MW Guanziroli, M Guo, JK Gurtu, H Gustafson, R Gutay, LJ Haan, H Hasan, A Hauschildt, D He, CF Hebbeker, T Hebert, M Herten, G Herten, U Herve, A Hilgers, K Hofer, H Hoorani, H Hsu, LS Hu, G Hu, GQ Ille, B Ilyas, MM Innocente, V Isiksal, E Janssen, H Jin, BN Jones, LW Kasser, A Khan, RA Kamyshkov, Y Karyotakis, Y Kaur, M Khokhar, S Khoze, V Kienzle-Focacci, MN Kinnison, WW Kirkby, D Kittel, W Klimentov, A Koenig, AC Kornadt, O Koutsenko, V Kraemer, RW Kramer, T Krastev, VR Krenz, W Krizmanic, JF Kumar, KS Kumar, V Kunin, A Lalieu, V Landi, G Lanske, D Lanzano, S Lebrun, P Lecomte, P Lecoq, P Le Coultre, P Lee, D Leedom, I Le Goff, JM Leistam, L Leiste, R Lenti, M Leonardi, E Lettry, J Levchenko, PM Leytens, X Li, C Li, HT Li, JF Li, L Li, PJ Li, Q Li, XG Liao, JY Lin, ZY Linde, FL Lindemann, B Linnhoefer, D Liu, R Liu, Y Lohmann, W Longo, E Lu, YS Lubbers, JM Luebelsmeyer, K Luci, C Luckey, D Ludovici, L Lue, X Luminari, L Ma, WG MacDermott, M Magahiz, R Maire, M Malhotra, K Malik, R Malinin, A Mana, C Mao, DN Mao, YF Maolinbay, M Marchesini, P Marchionni, A Martin, B Martinez-Lazo, L Marzano, F Massaro, GGG Matsuda, T Mazumdar, K McBride, P McMahon, T McNally, D Meinholz, T Merk, M Merola, L Meschini, M Metzger, WJ Mi, Y Mills, GB Mir, Y Mirabelli, G Mnich, J Moeller, M Monteleoni, B Morand, G Morand, R Morganti, S Moulai, NE Mount, R Mueller, S Nagy, E Napolitano, M Newman, H Never, C Niaz, MA Niessen, L Nowak, H Pandoulas, D Plasil, F Passaleva, G Paternoster, G Patricelli, S Pei, YJ Perret-Galliz, D Perrier, J Pevsner, A Pieri, M Piccolo, D Piroue, PA Plyaskin, V Pohl, M Pozhidaev, V Produit, N Qian, JM Quershi, KN Raghavan, R Rahal-Callot, G Razis, P Read, K Ren, D Ren, Z Reucroft, S Ricker, A Riemann, S Rind, O Rippich, C Rizvi, HA Roe, BP Roehner, M Roehner, S Roeser, U Romero, L Rose, J Rosier-Lees, S Rosmalen, R Rosselet, P Rubbia, C Rubio, JA Rubio, M Ruckstuhl, W Rykaczewski, H Sachwitz, M Salicio, J Salicio, JM Sanders, G Sarakinos, ME Sartorelli, G Sauvage, G Savin, A Shchegelskii, V Schmiiemann, K Schmitz, D Schmitz, P Schneegans, M Schopper, H Schotanus, DJ Shotkin, S Schreiber, HJ Schulte, R Schulte, S Schultze, K Schuette, J Schwenke, J Schwering, G Sciacca, C Scott, I Sehgal, R Seiler, PG Sens, JC Sheer, I Shen, DZ Shevchenko, V Shevchenko, S Shi, XR Shmakov, K Shoutko, V Shumilov, E Smirnov, N Soederstroem, E Sopczak, A Spartiotis, C Spickermann, T Spiess, B Spillantini, P Starosta, R Steuer, M Stickland, DP Sticozzi, F Stoeffl, W Stone, H Strauch, K Stringfellow, BC Sudhakar, K Sultanov, GG Sumner, RL Sun, LZ Suter, H Sutton, RB Swain, JD Syed, AA Tang, XW Tarkovsky, E Taylor, L Timmermans, C Ting, SCC Ting, SM Tong, YP Tonisch, F Tonutti, M Tonwar, SC Toth, J Trowitzsch, G Tully, C Tung, KL Ulbricht, J Urban, L Uwer, U Valenta, E Van de Walle, RT Vetlitskii, I Viertel, G Vikas, U Vivargent, M Vogel, H Vogt, H von Dardel, G Vorobev, I Vorobyov, AA Vuilleumier, L Wadhwa, M Wallraff, W Wang, CR Wang, CR Wang, GH Wang, JH Wang, QF Wang, XL Wang, YF Wang, Z Wang, ZM Weber, A Weber, J Weill, R Wenaus, J Wenninger, J White, M Willmott, C Wittgenstein, F Wright, D Wu, RJ Wu, SL Wu, SX Wu, YG Wyslouch, B Xie, YY Xu, YD Xu, ZZ Xue, ZL Yan, DS Yan, XJ Yang, BZ Yang, CG Yang, G Yang, KS Yang, QY Ye, CH Ye, JB Ye, Q Yeh, SC Yin, ZW You, JM Yzerman, M Zaccardelli, C Zehnder, L Zemp, P Zeng, M Zeng, Y Zhang, DH Zhang, ZP Zhou, JF Zhu, RY Zhuang, HL Zichichi, A Alexander, G Allison, J Allport, PP Anderson, KJ Arcelli, S Armitage, JC Ashton, P Astbury, A Axen, D Azuelos, G Bahan, GA Baines, JTM Ball, AH Banks, J Barker, GJ Barlow, RJ Batley, JR Beaudoin, G Beck, A Becker, J Behnke, T Bell, KW Bella, G Betheke, S Biebel, O Binder, U Bloodworth, IJ Bock, P Bosch, HM Bougerolle, S Brabson, B Breuker, H Brown, RM Brun, R Buijs, A Burckhart, HJ Capiluppi, P Carnegie, RK Carter, AA Carter, JR Chang, CY Charlton, DG Chrin, JTM Clarke, PEL Cohen, I Collins, WJ Conboy, JE Cooper, M Couch, M Coupland, M Cuffiani, M Dado, S Dallavalle, M De Jong, S Debu, P Deninno, MM Dieckmann, A Dittmar, M Dizit, MS Duchovni, E Duckeck, G Duerdoth, IP Dumas, DJP Eckerlin, G Elxombe, PA Estabrooks, PG Etzion, E Fabbri, FL Fincke-Keeler, M Fischer, HM Fong, DG Fukunaga, C Gaidot, A Ganel, O Gary, JW Gascon, J McGowan, RF Geddes, NI Geich-Gimbel, C Gensler, MW Gentit, FX Giacomelli, G Gibson, V Gibson, WR Gilles, JD Goldberg, J Goodrick, MJ Gorn, W Grandi, C Gross, E Hagemann, J Hanson, GG Hansroul, M Hargrove, CK Harrison, PF Hart, J Hattersley, PM Hauschild, M Hawkes, CM Heflin, E Hemingway, RJ Heuer, RD Hill, JC Hillier, SJ Hinshaw, DA Ho, C Hobbs, JD Hobson, RR Hochman, D Holl, B Homer, RJ Hou, SR Howarth, CP Humbert, R Hughes-Jones, RE Igo-Kemenes, P Ihssen, H Imrie, DC Janissen, L Jawahery, A Jeffreys, PW Jeremie, H Jimack, M Jobes, M Jones, RWL Jovanovic, P Karlen, D Kawagoe, K Kawamoto, T Keeler, RK Kellogg, RG Kennedy, BW Kleinwort, C Klem, DE Kobayashi, T Kokott, TP Komamiva, S Koepke, L Kowalewski, R Kreutzmann, H Von Krogh, J Kroll, J Kuwano, M Kyberd, P Lafferty, GD Lamarche, F Larson, WJ Lavter, JG Le Du, P Leblanc, P Lee, AM Lehto, MH Lellouch, D Lennert, P Leroy, C Lessard, ML Levegruen, S Levinson, L Lloyd, SL Loebinger, FK Lorah, JM Lorazo, B Losty, MJ Lou, XC Ludwig, J Mannelli, M Marcellini, S Maringer, G Martin, AJ Martin, JP Mashimo, T Maettig, P Maur, U McMahon, TJ McNutt, JR Meijers, F Menszner, D Merritt, FS Mes, H Michelini, A Middleton, RP Mikenberg, G Mildenberger, J Miller, DJ Milstene, C Mir, R Mohr, W Moisan, C Montanari, A Mori, T Moss, MW Mouthuy, T Murphy, PG Nellen, B Nguyen, HH Nozaki, M O'Neale, SW O'Neill, BP Oakham, FG Odorici, F Ogg, M Ogren, HO Oh, JH Oram, CJ Oreglia, MJ Orito, S Pansart, JP Panzer-Steindel, B Paschievici, P Patrick, GN Pawley, SJ Pfister, P Pilcher, JE Pinfold, JL Plane, DE Poffenberger, PR Poli, B Pouladdej, A Prebys, E Pritchard, W Przysiezniak, H Quast, Q Redmond, MW Rees, DL Riles, K Robins, SA Robinson, D Rollnik, A Roney, JM Rossberg, S Rossi, AM Routenburg, P Runge, K Runolfsson, O Rust, DR Sanghera, S Sasaki, M Schaile, AD Schappert, W Scharff-Hansen, P Schenk, P Von der Schmitt, H Schreiber, S Schwarz, J Scott, WG Settles, M Shen, BC Sherwood, P Shypit, R Simon, A Singh, P Siroli, GP Skuja, A Smith, AM Smith, TJ Snow, GA Sobie, RJ Springer, RW Sproston, M Stephens, K Stier, HE Strom, D Takeda, H Takeshita, T Taras, P Tarem, S Teixeira-Dias, P Thackray, NJ Tsukamoto, T Turner, MF Tysarczyk-Niemeyer, G Van den plas, D Van Kooten, R VanDalen, GJ Vasseur, G Virtue, CJ Wagner, A Wahl, C Walker, JP Ward, CP Ward, DR Watkins, PM Watson, AT Watson, NK Weber, M Weisz, S Wells, PS Wermes, N Weymann, M Whalley, MA Wilson, GW Wilson, JA Wingerter, I Winterer, VH Wood, NC Wotten, SA Wyatt, TR Yaari, R Yang, Y Yekutieli, G Zacharov, I Zeuner, W Zorn, GT TI ELECTROWEAK PARAMETERS OF THE Z0 RESONANCE AND THE STANDARD MODEL SO PHYSICS LETTERS B LA English DT Article ID SEMILEPTONIC NEUTRINO SCATTERING; PRECISE DETERMINATION; MIXING ANGLE AB The four LEP experiments have each performed precision measurements of Z0 parameters. A method is described for combining the results of the four experiments, which takes into account the experimental and theoretical systematic errors and their correlations. We apply this method to the 1989 and 1990 LEP data, corresponding to approximately 650 000 Z0 decays into hadrons and charged leptons, to obtain precision values for the Z0 parameters. We use these results to test the standard model and to constrain its parameters. C1 IN2P3 CNRS, LAPP, F-74019 Annecy Le Vieux, FRANCE. Univ Autonoma Barcelona, Lab Fis Altas Energias, E-08193 Bellaterra, SPAIN. Univ Bari, INFN, Sez Bari, I-70126 Bari, ITALY. Univ Bari, Dipartimento Fis, I-70126 Bari, ITALY. Acad Sinica, Inst High Energy Phys, Beijing, PEOPLES R CHINA. CERN, European Lab Particle Phys, CH-1211 Geneva 23, SWITZERLAND. Univ Blaise Pascal, IN2P3 CNRS, Lab Phys Corpusculaire, F-63177 Aubiere, FRANCE. Niels Bohr Inst, DK-2100 Copenhagen, DENMARK. NRCD, Athens, GREECE. Ecole Polytech, IN2P3 CNRS, Lab Phys Nucl & Hautes Energies, F-91128 Palaiseau, FRANCE. Univ Edinburgh, Dept Phys, Edinburgh EH9 3JZ, Midlothian, SCOTLAND. Univ Florence, INFN Sez Firenze, Dipartimento Fis, I-50125 Florence, ITALY. Florida State Univ, Supercomp Computat Research Ins, Tallahassee, FL 32306 USA. Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA. Ist Nazl Fis Nucl, Lab Nazl, I-00044 Frascati, ITALY. Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, SCOTLAND. Univ Heidelberg, Inst Hochenergiephys, W-6900 Heidelberg, GERMANY. Imperial Coll, Dept Phys, London SW7 2BZ, ENGLAND. Univ Innsbruck, Inst Expt Phys, A-6020 Innsbruck, AUSTRIA. Univ Lancaster, Dept Phys, Lancaster LA1 4YB, ENGLAND. Univ Mainz, Inst Phys, W-6500 Mainz, GERMANY. In2P3 CNRS, Fac Sci Luminy, Ctr Phys Particules, F-13288 Marseille, FRANCE. Werner Heisenberg Inst Phys, Max Planck Inst Phys & Astrophys, W-8000 Munich, GERMANY. Ames Lab, Ames, IA USA. Antwerp Univ, Antwerp, BELGIUM. Athen Univ, Nucl Phys Lab, Athens, GREECE. Tech Univ, Athens, GREECE. Bergen Univ, Bergen, NORWAY. Bohr Inst, Copenhagen, DENMARK. Bologna Univ, Bologna, ITALY. Brussels Univ, IIHE, Brussels, BELGIUM. Cantabria Univ, Santander, SPAIN. Coll France, Paris, FRANCE. INP Exp, Krakow, POLAND. JINR, Dubna, RUSSIA. Genoa Univ, Genoa, ITALY. Helsinki Univ, Helsinki, FINLAND. Ist Nazl Fis Nucl, Bologna, ITALY. Ist Nazl Fis Nucl, Genoa, ITALY. Ist Nazl Fis Nucl, Padua, ITALY. Ist Nazl Fis Nucl, Rome, ITALY. Ist Nazl Fis Nucl, Trieste, ITALY. Ist Nazl Fis Nucl, Turin, ITALY. Univ Victoria, Victoria, BC, CANADA. Univ British Columbia, Vancouver, BC, CANADA. TRIUMF, Vancouver, BC, CANADA. Univ Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, ENGLAND. Univ Bologna, Dipartimento Fis, Bologna, ITALY. Ist Nazl Fis Nucl, I-40126 Bologna, ITALY. Univ Bonn, Inst Phys, W-5300 Bonn 1, GERMANY. Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA. Cavendish Lab, Cambridge CB3 0HE, ENGLAND. Carleton Univ, Dept Phys, Ottawa, ON K1S 5BS, CANADA. Carleton Univ, Ctr Res Particle Phys, Ottawa, ON K1S 5BS, CANADA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Univ Chicago, Dept Phys, Chicago, IL 60637 USA. Univ Freiburg, Fak Phys, W-7800 Freiburg, GERMANY. Univ Heidelberg, Inst Phys, W-6900 Heidelberg, GERMANY. Indiana Univ, Dept Phys, Bloomington, IN 47405 USA. Univ London, Queen Mary & Westfield Coll, London E1 4NS, ENGLAND. Birbeck Coll, London WC1E 7HV, ENGLAND. Univ Coll London, London WC1E 6BT, ENGLAND. Univ Manchester, Schuster Lab, Dept Phys, Manchester M13 9PL, Lancs, ENGLAND. Univ Maryland, Dept Phys & Astron, College Pk, MD 20742 USA. Univ Montreal, Lab Phys Nucl, Montreal, PQ H3C 3J7, CANADA. Natl Res Council Canada, Herzberg Inst Astrophys, Ottawa, ON K1A 0R6, CANADA. Rutherford Appleton Lab, Didcot, ENGLAND. CEN Saclay, DphPE, F-91191 Gif Sur Yvette, FRANCE. Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, ISRAEL. Tel Aviv Univ, Dept Phys & Astron, IL-69978 Tel Aviv, ISRAEL. Int Ctr Elementary Particle Phys, Tokyo 113, JAPAN. Univ Tokyo, Dept Phys, Tokyo 113, JAPAN. Kobe Univ, Kobe, Hyogo 657, JAPAN. Brunel Univ, Uxbridge UB8 3PH, Middx, ENGLAND. Weizmann Inst Sci, Dept Nucl Phys, IL-76100 Rehovot, ISRAEL. Univ British Columbia, Dept Phys, Vancouver, BC V6T 2A6, CANADA. Univ Victoria, Dept Phys, Victoria, BC V8W 2Y2, CANADA. RWTH, Inst Phys 1, Aachen, GERMANY. RWTH, Inst Phys 3, Aachen, GERMANY. NIKHEF, Natl Inst High Energy Phys, Amsterdam, NETHERLANDS. NIKHEF H, Nijmegen, NETHERLANDS. Univ Nijmegen, Nijmegen, NETHERLANDS. Univ Michigan, Ann Arbor, MI USA. LAPP, Lab Phys Particules, Annecy, FRANCE. Johns Hopkins Univ, Baltimore, MD USA. IHEP, Beijing, PEOPLES R CHINA. Ist Nazl Fis Nucl, Sez Bologna, Bologna, ITALY. Tata Inst Fundamental Res, Bombay, Maharashtra, INDIA. Northeastern Univ, Boston, MA USA. Hungarian Acad Sci, Cent Res Inst, Budapest, HUNGARY. Harvard Univ, Cambridge, MA USA. MIT, Cambridge, MA USA. Ist Nazl Fis Nucl, Sez Firenze, Florence, ITALY. Univ Florence, Florence, ITALY. Leningrad Nucl Phys Inst, Gatchina, RUSSIA. CERN, European Lab Particle Phys, Geneva, SWITZERLAND. World Lab, FBLJA Project, Geneva, SWITZERLAND. Univ Geneva, Geneva, SWITZERLAND. Univ Sci & Technol China, Hefei, PEOPLES R CHINA. Univ Lausanne, Lausanne, SWITZERLAND. Lawrence Livermore Natl Lab, Livermore, CA USA. Los Alamos Natl Lab, Los Alamos, NM USA. Univ Lyon 1, IN2P3 CNRS, Inst Phys Nucl Lyon, Villeurbanne, FRANCE. CIEMAT, Ctr Invest Energeticas Medioambientales & Tecnol, Madrid, SPAIN. ITEP, Moscow, RUSSIA. Univ Naples, Naples, ITALY. INFN Sez Napoli, Naples, ITALY. Oak Ridge Natl Lab, Oak Ridge, TN USA. Calif Inst Technol, Pasadena, CA USA. Carnegie Mellon Univ, Pittsburgh, PA USA. Princeton Univ, Princeton, NJ USA. Ist Nazl Fis Nucl, Sez Roma, Rome, ITALY. Univ Roma La Sapienza, Rome, ITALY. Univ Calif San Diego, San Diego, CA USA. Union Coll, Schenectady, NY USA. SIC, Shanghai Inst Ceram, Shanghai, PEOPLES R CHINA. CLANP, Cent Lab Automat & Instrumentat, Sofia, BULGARIA. Univ Alabama, Tuscaloosa, AL USA. Purdue Univ, W Lafayette, IN USA. Paul Scherrer Inst, PSI, Wirenlingen, SWITZERLAND. Inst Hochenergiephys, Zeuthen, GERMANY. ETH Zurich, Zurich, SWITZERLAND. Univ Hamburg, Hamburg, GERMANY. High Energy Phys Grp, Taipei, TAIWAN. RP IN2P3 CNRS, LAPP, F-74019 Annecy Le Vieux, FRANCE. RI Hernandez-Rey, Juan Jose/N-5955-2014; Ferrante, Isidoro/F-1017-2012; Ho, Chien/O-6112-2016; Leijtens, Xaveer/F-3302-2010; Ruiz, Alberto/E-4473-2011; Zaitsev, Alexandre/B-8989-2017; Hoorani, Hafeez/D-1791-2013; Lusiani, Alberto/N-2976-2015; Marrocchesi, Pier Simone/N-9068-2015; Forti, Francesco/H-3035-2011; Lusiani, Alberto/A-3329-2016; Murtas, Fabrizio/B-5729-2012; Booth, Christopher/B-5263-2016; Lozano-Bahilo, Julio/F-4881-2016; Jones, Roger/H-5578-2011; Pacheco Pages, Andres/C-5353-2011; Olshevskiy, Alexander/I-1580-2016; Kamyshkov, Yuri/J-7999-2016; Roditi, Itzhak/O-7448-2014; Grandi, Claudio/B-5654-2015; D'Alessandro, Raffaello/F-5897-2015; Mir, Lluisa-Maria/G-7212-2015; Duran, Ignacio/H-7254-2015; Adeva, Bernardo /L-1378-2014; ciocci, maria agnese /I-2153-2015; Zuniga, Juan/P-4385-2014; Michelotto, Michele/A-9571-2013; Matorras, Francisco/I-4983-2015; Sanchez, Eusebio/H-5228-2015; Ferrer, Antonio/H-2942-2015; Rovelli, Tiziano/K-4432-2015; Zalewski, Piotr/H-7335-2013; Vaz, Pedro/K-2464-2013; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Zukanovich Funchal, Renata/C-5829-2013; Montanari, Alessandro/J-2420-2012; Cerrada, Marcos/J-6934-2014; Bosman, Martine/J-9917-2014; Gomez Cadenas, Juan Jose/L-2003-2014; Fernandez, Enrique/L-5387-2014; Gonzalez Romero, Enrique/L-7561-2014; Ragazzi, Stefano/D-2463-2009 OI Hernandez-Rey, Juan Jose/0000-0002-1527-7200; Ferrante, Isidoro/0000-0002-0083-7228; Ho, Chien/0000-0002-4094-9232; Leijtens, Xaveer/0000-0001-7794-8236; Ruiz, Alberto/0000-0002-3639-0368; Zaitsev, Alexandre/0000-0002-4961-8368; Lusiani, Alberto/0000-0002-6876-3288; Marrocchesi, Pier Simone/0000-0003-1966-140X; Forti, Francesco/0000-0001-6535-7965; Lusiani, Alberto/0000-0002-6876-3288; Booth, Christopher/0000-0002-6051-2847; Lozano-Bahilo, Julio/0000-0003-0613-140X; Jones, Roger/0000-0002-6427-3513; Pacheco Pages, Andres/0000-0001-8210-1734; Olshevskiy, Alexander/0000-0002-8902-1793; Kamyshkov, Yuri/0000-0002-3789-7152; Roditi, Itzhak/0000-0003-2363-5626; Grandi, Claudio/0000-0001-5998-3070; D'Alessandro, Raffaello/0000-0001-7997-0306; Mir, Lluisa-Maria/0000-0002-4276-715X; Adeva, Bernardo /0000-0001-9756-3712; ciocci, maria agnese /0000-0003-0002-5462; Zuniga, Juan/0000-0002-1041-6451; Michelotto, Michele/0000-0001-6644-987X; Matorras, Francisco/0000-0003-4295-5668; Sanchez, Eusebio/0000-0002-9646-8198; Ferrer, Antonio/0000-0003-0532-711X; Rovelli, Tiziano/0000-0002-9746-4842; Vaz, Pedro/0000-0002-7186-2359; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Zukanovich Funchal, Renata/0000-0001-6749-0022; Montanari, Alessandro/0000-0003-2748-6373; Cerrada, Marcos/0000-0003-0112-1691; Bosman, Martine/0000-0002-7290-643X; Gomez Cadenas, Juan Jose/0000-0002-8224-7714; Fernandez, Enrique/0000-0002-6405-9488; Gonzalez Romero, Enrique/0000-0003-2376-8920; Ragazzi, Stefano/0000-0001-8219-2074 NR 22 TC 54 Z9 54 U1 8 U2 46 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD FEB 6 PY 1992 VL 276 IS 1-2 BP 247 EP 253 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HH830 UT WOS:A1992HH83000041 ER PT J AU ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELOUS, K BELTRAN, P BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOTNER, O BOUQUET, B BOURDARIOS, C BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DULINSKI, W EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F FORBES, KAJ FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M KATARGIN, A KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIUKHIN, V KOURKOUMELIS, C KRAMER, PH KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIEB, E LIKO, D LILLETHUN, E LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MENICHETTI, E MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OESTERBERG, K OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONJIN, V RONNQVIST, C ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TORASSA, E TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VILANOVA, D VISHNEVSKY, N VITALE, L VLASOV, E VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J AF ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELOUS, K BELTRAN, P BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOTNER, O BOUQUET, B BOURDARIOS, C BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DULINSKI, W EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F FORBES, KAJ FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M KATARGIN, A KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIUKHIN, V KOURKOUMELIS, C KRAMER, PH KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIEB, E LIKO, D LILLETHUN, E LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MENICHETTI, E MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OESTERBERG, K OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONJIN, V RONNQVIST, C ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TORASSA, E TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VILANOVA, D VISHNEVSKY, N VITALE, L VLASOV, E VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J TI MULTIPLICITY DEPENDENCE OF MEAN TRANSVERSE-MOMENTUM IN E+E- ANNIHILATIONS AT LEP ENERGIES SO PHYSICS LETTERS B LA English DT Article ID ANTI-PROTON COLLIDER; ISR ENERGIES; COLLISIONS; SPECTRA; EVENTS; MATTER; QCD AB A strong increase of the mean transverse momentum [p(t)] with the number of charged particles n(ch) is observed in e+e- annihilations into hadrons at LEP energies, The effect resembles correlations observed in hadron-hadron interactions. In e+e- annihilations the [p(t)] and n(ch) correlations can be accounted for by gluon radiation. C1 AUSTRIAN ACAD SCI,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA. CENS,DPHPE,F-91191 GIF SUR YVETTE,FRANCE. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV LUND,DEPT PHYS,S-22363 LUND,SWEDEN. JOINT NUCL RES INST,DUBNA 101000,USSR. UNIV VALENCIA,CSIC,INST FIS CORPUSCULAR,E-46100 VALENCIA,SPAIN. UNIV VALENCIA,DEPT FIS ATOM MOLEC & NUCL,E-46100 VALENCIA,SPAIN. UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY. CERN,CH-1211 GENEVA 23,SWITZERLAND. UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE. UNIV LYON 1,F-69622 VILLEURBANNE,FRANCE. UNIV KARLSRUHE,INST EXPTL KERNPHYS,W-7500 KARLSRUHE 1,GERMANY. UNIV STOCKHOLM,INST PHYS,S-11346 STOCKHOLM,SWEDEN. UNIV PARIS 11,ACCELERATEUR LINEAIRE LAB,F-91405 ORSAY,FRANCE. NATL INST KERNPHYS & HOGE ENERGIE FYS H,1009 DB AMSTERDAM,NETHERLANDS. UNIV GRENOBLE 1,INST SCI NUCL,F-38026 ST MARTIN DHERES,FRANCE. UNIV TRIESTE,DIPARTIMENTO FIS,I-34127 TRIESTE,ITALY. IST NAZL FIS NUCL,I-34127 TRIESTE,ITALY. UNIV UDINE,IST FIS,I-33100 UDINE,ITALY. IST SUPER SANITA,IST NAZL FIS NUCL,I-00161 ROME,ITALY. UNIV OXFORD,NUCL PHYS LAB,OXFORD OX1 3RH,ENGLAND. UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. IST NAZL FIS NUCL,I-20133 MILAN,ITALY. UNIV PARIS 06,LPNHE,F-75005 PARIS,FRANCE. UNIV PARIS 07,F-75230 PARIS 5,FRANCE. UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,W-5600 WUPPERTAL 1,GERMANY. UNIV GENOA,DIPARTIMENTO FIS,I-16146 GENOA,ITALY. IST NAZL FIS NUCL,I-16146 GENOA,ITALY. COLL FRANCE,PHYS CORPUSCULAIRE LAB,F-75231 PARIS 05,FRANCE. PROTVINO HIGH ENERGY PHYS INST,PROTVINO 142284,USSR. NCSR DEMOKRITOS,INST NUCL PHYS,GR-15310 ATHENS,GREECE. DELPHI,CRN GRP,DIV HAUTES ENERGIES,F-67037 STRASBOURG,FRANCE. LEPSI,F-67037 STRASBOURG,FRANCE. UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM. VRIJE UNIV BRUSSELS,IIHE,B-1050 BRUSSELS,BELGIUM. UNIV ETAT MONS,FAC SCI,SERV PHYS PARTICULARS ELEMENTAIRES,B-7000 MONS,BELGIUM. UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY. IST NAZL FIS NUCL,I-10125 TURIN,ITALY. UNIV ROME 2,DIPARTIMENTO FIS,I-00173 ROME,ITALY. IST NAZL FIS NUCL,I-00173 ROME,ITALY. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,ENGLAND. UNIV UPPSALA,DEPT RADIAT SCI,S-75121 UPPSALA,SWEDEN. UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY. IST NAZL FIS NUCL,I-35131 PADUA,ITALY. UNIV HELSINKI,DEPT HIGH ENERGY PHYS,SF-00170 HELSINKI 17,FINLAND. UNIV OSLO,DEPT PHYS,N-1000 OSLO 3,NORWAY. UNIV SANTANDER,FAC CIENCIAS,E-39005 SANTANDER,SPAIN. UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. UNIV COMPLUTENSE MADRID,E-28040 MADRID,SPAIN. NIELS BOHR INST,DK-2100 COPENHAGEN 0,DENMARK. INST NUCL STUDIES,PL-00681 WARSAW,POLAND. UNIV WARSAW,PL-00681 WARSAW,POLAND. NATL TECH UNIV ATHENS,DEPT PHYS,GR-15773 ATHENS,GREECE. INST NUCL PHYS,HIGH ENERGY PHYS LAB,PL-30055 KRAKOW 30,POLAND. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YB,ENGLAND. UNIV AIX MARSEILLE 2,F-13288 MARSEILLE 09,FRANCE. RP ABREU, P (reprint author), LIP,AV ELIAS GARCIA 14,P-1000 LISBON,PORTUGAL. RI Vaz, Pedro/K-2464-2013; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Zukanovich Funchal, Renata/C-5829-2013; Pimenta, Mario/M-1741-2013; Gomez Cadenas, Juan Jose/L-2003-2014; Roditi, Itzhak/O-7448-2014; Zuniga, Juan/P-4385-2014; Michelotto, Michele/A-9571-2013; Matorras, Francisco/I-4983-2015; Ferrer, Antonio/H-2942-2015; Rovelli, Tiziano/K-4432-2015; Fernandez-Alonso, Mercedes/F-2557-2016; Lozano-Bahilo, Julio/F-4881-2016; Olshevskiy, Alexander/I-1580-2016; Paganoni, Marco/A-4235-2016; Contreras Gonzalez, Jose Luis/K-7255-2014; Hernandez-Rey, Juan Jose/N-5955-2014; Abreu, Pedro/L-2220-2014; Barao, Fernando/O-2357-2016; Zaitsev, Alexandre/B-8989-2017; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011; de Groot, Nicolo/A-2675-2009; Katsanevas, Stavros/A-4297-2011; Ruiz, Alberto/E-4473-2011; branchini, paolo/A-4857-2011; Shellard, Ronald/G-4825-2012; Torassa, Ezio/I-1788-2012; Giacomelli, Paolo/B-8076-2009; Fruhwirth, Rudolf/H-2529-2012; Dracos, Marcos/K-2335-2012; Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; OI Vaz, Pedro/0000-0002-7186-2359; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Zukanovich Funchal, Renata/0000-0001-6749-0022; Pimenta, Mario/0000-0002-2590-0908; Gomez Cadenas, Juan Jose/0000-0002-8224-7714; Roditi, Itzhak/0000-0003-2363-5626; Zuniga, Juan/0000-0002-1041-6451; Michelotto, Michele/0000-0001-6644-987X; Matorras, Francisco/0000-0003-4295-5668; Ferrer, Antonio/0000-0003-0532-711X; Rovelli, Tiziano/0000-0002-9746-4842; Fernandez-Alonso, Mercedes/0000-0002-1311-5275; Lozano-Bahilo, Julio/0000-0003-0613-140X; Olshevskiy, Alexander/0000-0002-8902-1793; Paganoni, Marco/0000-0003-2461-275X; Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Hernandez-Rey, Juan Jose/0000-0002-1527-7200; Abreu, Pedro/0000-0002-9973-7314; Barao, Fernando/0000-0002-8346-9941; Zaitsev, Alexandre/0000-0002-4961-8368; Ruiz, Alberto/0000-0002-3639-0368; Shellard, Ronald/0000-0002-2983-1815; Dracos, Marcos/0000-0003-0514-193X; Matteuzzi, Clara/0000-0002-4047-4521; DE MIN, ALBERTO/0000-0002-8130-9389; Demaria, Natale/0000-0003-0743-9465; Bonesini, Maurizio/0000-0001-5119-1896; Sannino, Mario/0000-0001-7700-8383; De Angelis, Alessandro/0000-0002-3288-2517; De Lotto, Barbara/0000-0003-3624-4480; Benlloch Baviera, Jose Maria/0000-0001-6073-1436; Tabarelli de Fatis, Tommaso/0000-0001-6262-4685; Lacasta, Carlos/0000-0002-2623-6252; Torassa, Ezio/0000-0003-2321-0599 NR 29 TC 8 Z9 8 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD FEB 6 PY 1992 VL 276 IS 1-2 BP 254 EP 262 DI 10.1016/0370-2693(92)90573-M PG 9 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HH830 UT WOS:A1992HH83000042 ER PT J AU SUGAMA, T BROYER, R AF SUGAMA, T BROYER, R TI ADVANCED POLY(ACRYLIC)ACID-MODIFIED ZINC PHOSPHATE CONVERSION COATINGS - USE OF COBALT AND NICKEL CATIONS SO SURFACE & COATINGS TECHNOLOGY LA English DT Article ID X-RAY PHOTOELECTRON; OXIDES AB The incorporation of cobalt (Co2+) and nickel (Ni2+) ions in a poly(acrylic)acid (p(AA))-modified zinc phosphate solution promoted the growth and development of crystalline zinc phosphate (Zn.Ph) conversion coatings deposited on steel surfaces. This enhancement was due primarily to the preferential uptake of Co2+ and Ni2+ ions by p(AA), to form the Co- and Ni-OOC- salt complexes, rather than complexes with zinc ions. The electron trapping behaviors of Co2+ and Ni2+ dissociated from the salt complexes, and the hydroxides in the NaCl solution inhibited the cathodic reaction on Zn.Ph. In particular, the conversion coatings derived from the nickel-modified phosphate solution were characterized by the formation of a coating consisting of hopeite as a major crystal phase, zinc orthophosphate dihydrate as a minor phase, and an amorphous iron-rich phosphate phase; this coating provided an extensive coverage over the steel, which contributed to protecting it from corrosion. C1 UNION HIGH SCH,DEPT SCI,N 3RD ST UNION,NJ 07083. RP SUGAMA, T (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV ENERGY EFFICIENCY & CONSERVAT,UPTON,NY 11973, USA. NR 9 TC 7 Z9 7 U1 3 U2 6 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD FEB 6 PY 1992 VL 50 IS 2 BP 89 EP 95 DI 10.1016/0257-8972(92)90048-F PG 7 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA HG262 UT WOS:A1992HG26200002 ER PT J AU DAVISON, BH SCOTT, CD AF DAVISON, BH SCOTT, CD TI A PROPOSED BIPARTICLE FLUIDIZED-BED FOR LACTIC-ACID FERMENTATION AND SIMULTANEOUS ADSORPTION SO BIOTECHNOLOGY AND BIOENGINEERING LA English DT Note DE FERMENTATION; ADSORPTION; LACTIC ACID; FLUIDIZED BED ID EXTRACTIVE FERMENTATION; ETHANOL-PRODUCTION; ACETONE-BUTANOL; RECOVERY AB A bioreactor configuration is proposed for simultaneous fermentation and separation of the desired product. The bioreactor consists of a columnar fluidized bed of immobilized microorganisms. Denser adsorbent particles are added to this column. These adsorbent particles fall through the bed, absorb the product, and are removed from the base of the columnar reactor. The system hydrodynamics and the separability of the two types of particles were confirmed for low-density gel beads. The addition of the adsorbent, activated carbon, to a fermentation of Lactobacillus delbreuckii absorbed lactic acid. The addition of adsorbent enhanced the fermentation and controlled the pH. RP DAVISON, BH (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,POB 2008,BLDG 4505,MS 6226,OAK RIDGE,TN 37831, USA. RI Davison, Brian/D-7617-2013 OI Davison, Brian/0000-0002-7408-3609 NR 17 TC 38 Z9 39 U1 0 U2 5 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0006-3592 J9 BIOTECHNOL BIOENG JI Biotechnol. Bioeng. PD FEB 5 PY 1992 VL 39 IS 3 BP 365 EP 368 DI 10.1002/bit.260390317 PG 4 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA HA001 UT WOS:A1992HA00100016 PM 18600955 ER PT J AU CYGAN, RT CARRIGAN, CR AF CYGAN, RT CARRIGAN, CR TI TIME-DEPENDENT SORET TRANSPORT - APPLICATIONS TO BRINE AND MAGMA SO CHEMICAL GEOLOGY LA English DT Article ID THERMAL-DIFFUSION; BISHOP-TUFF; DIFFERENTIATION; MIGRATION; CHAMBERS; GRADIENT AB We have developed a numerical model which simulates the coupling of a compositional field to a time-dependent temperature field and have applied it to natural salt and magma systems. An implicit central difference numerical approach is used in which the coupling of mass and heat is taken into account by chemical and thermal diffusion mass fluxes and a conductive heat flux. Unique in this analysis is the time dependency of the thermal regime and the role of transient thermal gradients in enhancing mass transport. Zero mass flux at the two end boundaries of a Soret cell is required in modeling certain thermal diffusion experiments for deriving the Soret coefficients of brines. For the case of an evolving temperature field, the numerical analysis predicts a transient period where thermal diffusion creates an unexpected enrichment at the hot end of the Soret cell and a depletion at the cold end. For a fixed linear temperature gradient, all NaCl enrichment normally occurs at the cold end of the cell. In a second application, several initial and boundary conditions are incorporated in the one-dimensional model in order to evaluate a variety of magmatic boundary layer scenarios. The results of the magmatic system model indicate that minimal chemical fractionation will occur as the thermal field propagates through the boundary layer. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT EARTH SCI,LIVERMORE,CA 94550. RP CYGAN, RT (reprint author), SANDIA NATL LABS,DIV GEOCHEM,ALBUQUERQUE,NM 87185, USA. NR 49 TC 11 Z9 11 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2541 J9 CHEM GEOL JI Chem. Geol. PD FEB 5 PY 1992 VL 95 IS 3-4 BP 201 EP 212 DI 10.1016/0009-2541(92)90012-T PG 12 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA HH537 UT WOS:A1992HH53700001 ER PT J AU ENGLER, DA CAMPION, SR HAUSER, MR COOK, JS NIYOGI, SK AF ENGLER, DA CAMPION, SR HAUSER, MR COOK, JS NIYOGI, SK TI CRITICAL FUNCTIONAL REQUIREMENT FOR THE GUANIDINIUM GROUP OF THE ARGININE-41 SIDE-CHAIN OF HUMAN EPIDERMAL GROWTH-FACTOR AS REVEALED BY MUTAGENIC INACTIVATION AND CHEMICAL REACTIVATION SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID SITE-DIRECTED MUTAGENESIS; NUCLEAR-MAGNETIC-RESONANCE; TYROSINE KINASE-ACTIVITY; FACTOR RECEPTOR; TERTIARY STRUCTURE; PROTEIN; RESIDUES; BINDING; DOMAIN AB In a preliminary study we demonstrated that the formation of the epidermal growth factor (EGF) receptor-ligand complex requires the participation of the highly conserved arginine 41 side chain of the growth factor peptide (Engler, D. A., Montelione, G. T., and Niyogi, S. K. (1990) FEBS Lett. 271, 47-50). In an attempt to gain further insight into the nature of this interaction(s), we used both site-directed mutagenesis and chemical modification reagents to produce human EGF (hEGF) analogues with altered chemical properties of the residue 41 side chain. Eight mutant analogues of hEGF were generated, substituting arginine 41 with lysine, glutamine, isoleucine, tyrosine, glycine, alanine, aspartate, or glutamate. Although each of the mutant analogues was able to displace wild-type hEGF fully in receptor competition binding assays, affinity of the receptor for the mutants was substantially reduced, varying from 0.4 to < 0.01% of that observed for wild-type growth factor. At sufficiently high concentrations these mutants were able to stimulate DNA synthesis in mouse keratinocytes. Substitution of lysine for arginine 41 reduced the receptor affinity 250-fold from that observed for wild type, despite retention of the positive electrostatic charge. The lysine substitution leaves a reactive amine at position 41 and made it possible, using amine-specific chemical modification reagents, to produce selected arginine homologues that were tested for their effects on receptor binding, receptor tyrosine kinase activation, and stimulation of DNA synthesis in mouse keratinocytes. The reaction of lysine 41 with methyl acetimidate resulted in a lysine-acetamidine product which only partially restored activity of the lysine hEGF mutant. However, reaction with O-methylisourea resulted in generation of an arginine 41 homologue (homoarginine) which restored full activity. The results indicate that the chemical properties inherent in the guanidinium group of the arginine 41 side chain of hEGF are responsible for optimal receptor-ligand association. C1 UNIV TENNESSEE,OAK RIDGE GRAD SCH BIOMED SCI,OAK RIDGE NATL LAB,DIV BIOL,POB 2009,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,PROT ENGN & MOLEC MUTAGENESIS PROGRAM,OAK RIDGE,TN 37831. FU NCI NIH HHS [CA 09336, CA 09104, CA 50735] NR 36 TC 46 Z9 47 U1 0 U2 2 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD FEB 5 PY 1992 VL 267 IS 4 BP 2274 EP 2281 PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA HB532 UT WOS:A1992HB53200027 PM 1733935 ER PT J AU MIURA, M MICCA, PL HEINRICHS, JC GABEL, D FAIRCHILD, RG SLATKIN, DN AF MIURA, M MICCA, PL HEINRICHS, JC GABEL, D FAIRCHILD, RG SLATKIN, DN TI BIODISTRIBUTION AND TOXICITY OF 2,4-DIVINYL-NIDO-ORTHO-CARBORANYLDEUTEROPORPHYRIN IX IN MICE SO BIOCHEMICAL PHARMACOLOGY LA English DT Article ID NEUTRON-CAPTURE THERAPY; BORON; TUMOR; TISSUE; PORPHYRINS; MOUSE AB BALB/c mice with transplanted subcutaneous KHJJ mammary carcinomas were given 2,4-divinyl-nido-o-carboranyldeuteroporphyrin IX (VCDP), a prospective boron carrier for boron neutron-capture therapy, to determine the dose schedule that results in maximal boron uptake in tumor. A total dose of 270 +/- 10-mu-g/g body weight given in a 4-day multiple intraperitoneal injection schedule (3/day) resulted in 30-50-mu-g boron/g tumor. After such a dose, thrombocytopenia, granulocytosis and altered liver enzyme levels were measured in the blood. Blood boron clearance was followed for an 18 hr to 6 day post-injection period. Toxic effects of VCDP subsided within 4-6 days after the last injection. In view of the > 30-mu-g/g peak accumulation of boron in tumor from VCDP and the subsequent rapid reversal of VCDP toxicity, further studies of VCDP in small mammals relevant to its distribution, toxicity and potential clinical use for neutron-capture therapy of tumors appear warranted. C1 UNIV BREMEN,DEPT CHEM,W-2800 BREMEN 33,GERMANY. RP MIURA, M (reprint author), BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973, USA. FU NCI NIH HHS [1R01 CA38107-01A2] NR 20 TC 36 Z9 37 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0006-2952 J9 BIOCHEM PHARMACOL JI Biochem. Pharmacol. PD FEB 4 PY 1992 VL 43 IS 3 BP 467 EP 476 DI 10.1016/0006-2952(92)90565-Z PG 10 WC Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA HF436 UT WOS:A1992HF43600012 PM 1540204 ER PT J AU WERNER, MH WEMMER, DE AF WERNER, MH WEMMER, DE TI 3-DIMENSIONAL STRUCTURE OF SOYBEAN TRYPSIN CHYMOTRYPSIN BOWMAN-BIRK INHIBITOR IN SOLUTION SO BIOCHEMISTRY LA English DT Article ID NUCLEAR MAGNETIC-RESONANCE; POTATO CARBOXYPEPTIDASE INHIBITOR; RESTRAINED MOLECULAR-DYNAMICS; INTERPROTON DISTANCE DATA; SECONDARY STRUCTURE; STEREOSPECIFIC ASSIGNMENTS; COUPLING-CONSTANTS; PROTEASE INHIBITOR; NMR-SPECTROSCOPY; GEOMETRY AB The three-dimensional Structure of soybean trypsin/chymotrypsin Bowman-Birk inhibitor in solution has been determined by two-dimensional H-1 nuclear magnetic resonance spectroscopy and dynamical simulated annealing using the program XPLOR. The structure was defined by 907 NOEs involving intra- and interresidue contacts which served as distance constraints for a protocol of dynamical simulated annealing. In addition, 48-phi-angle constraints involving non-proline amino acids, 29-chi-angle constraints, six omega-angle constraints for the X-Pro peptide bond, and 35 stereoassignments for prochiral centers were incorporated during the course of the calculation. The protein is characterized by two distinct binding domains for serine protease. Each domain is comprised of a beta-hairpin (antiparallel beta-sheet and a cis-proline-containing type VIb reverse turn) with a short segment making a third strand of antiparallel beta-sheet. The structure determination and refinement are described, and the structure is compared to other structures of Bowman-Birk inhibitors as well as other families of serine protease inhibitors. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM BIODYNAM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. FU ORS NIH HHS [8SORROS61A] NR 43 TC 97 Z9 101 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD FEB 4 PY 1992 VL 31 IS 4 BP 999 EP 1010 DI 10.1021/bi00119a008 PG 12 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA HC219 UT WOS:A1992HC21900008 PM 1734975 ER PT J AU KOBERTZ, WR BERTOZZI, CR BEDNARSKI, MD AF KOBERTZ, WR BERTOZZI, CR BEDNARSKI, MD TI AN EFFICIENT METHOD FOR THE SYNTHESIS OF ALPHA-C-GLYCOSYL AND BETA-C-GLYCOSYL ALDEHYDES SO TETRAHEDRON LETTERS LA English DT Article ID POLYHYDROXYLATED NATURAL-PRODUCTS; DIASTEREOSELECTIVE SYNTHESES; GLUCOPYRANOSYL DERIVATIVES; STEREOSELECTIVE SYNTHESIS; GLYCOPYRANOSIDES; ALLYLTRIMETHYLSILANE; GLYCOFURANOSIDES; GLYCOSIDATION; DISACCHARIDES; ALLYLSILANES AB A practical method for the synthesis of alpha- and beta-C-glycosyl aldehydes from a single carbohydrate precursor is described. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720. NR 35 TC 68 Z9 68 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0040-4039 J9 TETRAHEDRON LETT JI Tetrahedron Lett. PD FEB 4 PY 1992 VL 33 IS 6 BP 737 EP 740 DI 10.1016/S0040-4039(00)77703-3 PG 4 WC Chemistry, Organic SC Chemistry GA HD500 UT WOS:A1992HD50000007 ER PT J AU LIN, SY ZASLAVSKY, A HIRAKAWA, K TSUI, DC KLEM, JF AF LIN, SY ZASLAVSKY, A HIRAKAWA, K TSUI, DC KLEM, JF TI SUBBAND DISPERSION OF HOLES IN ALAS/IN0.10GA0.90AS/ALAS STRAINED-LAYER QUANTUM-WELLS MEASURED BY RESONANT MAGNETOTUNNELING SO APPLIED PHYSICS LETTERS LA English DT Article ID MAGNETIC-FIELDS; HETEROSTRUCTURES; HETEROJUNCTIONS; SUPERLATTICES; TRANSPORT AB Magnetotunneling of holes through the double-barrier AlAs/In0.10Ga0.90As strained-layer structure is investigated with magnetic fields up to 23 T to determine the in-plane dispersion of the two-dimensional subbands in the In0.10Ga0.90As quantum well. Mass reversal, nonparabolicity, anticrossing, and anisotropy are observed. The lack of electronlike dispersion in the lowest-energy light-hole subband is attributed to the large biaxial compressional strain in the In0.10Ga0.90As, which suppresses the mixing of heavy and light-hole states even at finite in-plane wave vectors. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP LIN, SY (reprint author), PRINCETON UNIV,DEPT ELECT ENGN,PRINCETON,NJ 08544, USA. RI Zaslavsky, Alexander/F-6232-2012 NR 20 TC 20 Z9 20 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD FEB 3 PY 1992 VL 60 IS 5 BP 601 EP 603 DI 10.1063/1.106566 PG 3 WC Physics, Applied SC Physics GA HB582 UT WOS:A1992HB58200028 ER PT J AU RONG, FC GERARDI, GJ BUCHWALD, WR POINDEXTER, EH UMLOR, MT KEEBLE, DJ WARREN, WL AF RONG, FC GERARDI, GJ BUCHWALD, WR POINDEXTER, EH UMLOR, MT KEEBLE, DJ WARREN, WL TI ELECTRICALLY DETECTED MAGNETIC-RESONANCE OF A TRANSITION-METAL RELATED RECOMBINATION CENTER IN SI P-N DIODES SO APPLIED PHYSICS LETTERS LA English DT Article ID SPIN-DEPENDENT RECOMBINATION; SILICON; PLATINUM; JUNCTION AB A hyperfine structure has been observed by electrically detected magnetic resonance from a Si p-n diode. From the hyperfine splitting, and the natural abundance of the interacting I = 1/2 nuclear species, the recombination center is found to be consistent with a platinum complex. C1 MICHIGAN TECHNOL UNIV,DEPT PHYS,HOUGHTON,MI 49931. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP RONG, FC (reprint author), USA,ELECTR TECHNOL & DEVICES LAB,GEOCTR INC,FT MONMOUTH,NJ 07703, USA. RI Keeble, David /C-6633-2012 OI Keeble, David /0000-0002-5378-799X NR 14 TC 30 Z9 30 U1 1 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD FEB 3 PY 1992 VL 60 IS 5 BP 610 EP 612 DI 10.1063/1.106569 PG 3 WC Physics, Applied SC Physics GA HB582 UT WOS:A1992HB58200031 ER PT J AU MEFFE, GK AF MEFFE, GK TI PLASTICITY OF LIFE-HISTORY CHARACTERS IN EASTERN MOSQUITOFISH (GAMBUSIA-HOLBROOKI, POECILIIDAE) IN RESPONSE TO THERMAL-STRESS SO COPEIA LA English DT Article ID PHENOTYPIC PLASTICITY; LARGEMOUTH BASS; TEMPERATURE; TRAITS; GROWTH; CONSEQUENCES; EFFLUENT; AFFINIS; PISCES AB Eastern mosquitofish (Gambusia holbrooki) from a population exposed to abnormally high temperatures for 28 years were raised from birth in environmental chambers at 25 C (a normal temperature) or 32 C (a stressful temperature). Fish grew faster and larger at 25 C and were in better somatic condition than were fish grown at 32 C. There were no differences in ovum production at the two temperatures. At the higher temperature, fish matured at a younger age and a smaller size than did those at the normal temperature. This particular age-size at maturity relationship is not included as one of the predicted norms of reaction of a model by Stearns and Koella (1986) that deals with age and size at maturity under various growth rates. Gambusia holbrooki is a highly plastic species, which makes it adaptable to a variety of conditions, but also complicates interpretations of its interpopulation life-history differences; much of its life-history variation may be a consequence of different developmental environments rather than adaptive responses to demographic conditions. RP MEFFE, GK (reprint author), UNIV GEORGIA, SAVANNAH RIVER ECOL LAB, DRAWER E, AIKEN, SC 29801 USA. NR 25 TC 35 Z9 36 U1 0 U2 9 PU AMER SOC ICHTHYOLOGISTS & HERPETOLOGISTS PI MIAMI PA MAUREEN DONNELLY, SECRETARY FLORIDA INT UNIV BIOLOGICAL SCIENCES, 11200 SW 8TH STREET, MIAMI, FL 33199 USA SN 0045-8511 EI 1938-5110 J9 COPEIA JI Copeia PD FEB 3 PY 1992 IS 1 BP 94 EP 102 DI 10.2307/1446539 PG 9 WC Zoology SC Zoology GA HC975 UT WOS:A1992HC97500010 ER PT J AU YE, D BEARD, KB GARG, U JANSSENS, RVF CARPENTER, MP AHMAD, I KHOO, TL MOORE, EF WOLFS, FLH BENET, P GRABOWSKI, ZW DRIGERT, MW AF YE, D BEARD, KB GARG, U JANSSENS, RVF CARPENTER, MP AHMAD, I KHOO, TL MOORE, EF WOLFS, FLH BENET, P GRABOWSKI, ZW DRIGERT, MW TI MULTIPLE BAND STRUCTURES IN HG-191 SO NUCLEAR PHYSICS A LA English DT Article DE GD-160 (S-36, 5N), E = 162, 167, 172 MEV; MEASURED E-GAMMA, I-GAMMA, GAMMA-GAMMA(THETA), DOPPLER SHIFTS; HG-191 DEDUCED LEVELS, J, PI-BAND STRUCTURES, DEFORMATION; ENRICHED TARGET, COMPTON-SUPPRESSED GE-DETECTORS, CENTRAL ARRAY OF BGO HEXAGONS; CRANKED SHELL MODEL CALCULATIONS ID PARTICLE-HOLE EXCITATIONS; HIGH-SPIN; SHAPE COEXISTENCE; ROTATIONAL BANDS; NUCLEI; MODEL; SUPERDEFORMATION; ALIGNMENT; AU-187 AB The level structure of the nucleus 191Hg has been considerably extended from previous studies by using the Gd-160(S-36, 5n) reaction in conjunction with an array of Compton-suppressed germanium detectors. A series of 13 different level sequences has been established in addition to three superdeformed bands. A majority of the band structures can be understood in cranked shell model calculations assuming an oblate collective nuclear shape. There is some evidence for the onset of triaxiality. Finally, two bands of single-particle character have been found. They are interpreted as being associated with a prolate non-collective shape (gamma = -120-degrees). C1 ARGONNE NATL LAB,ARGONNE,IL 60439. PURDUE UNIV,W LAFAYETTE,IN 47907. EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. RP YE, D (reprint author), UNIV NOTRE DAME,NOTRE DAME,IN 46556, USA. RI Carpenter, Michael/E-4287-2015 OI Carpenter, Michael/0000-0002-3237-5734 NR 26 TC 29 Z9 30 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD FEB 3 PY 1992 VL 537 IS 1-2 BP 207 EP 236 DI 10.1016/0375-9474(92)90165-G PG 30 WC Physics, Nuclear SC Physics GA HG146 UT WOS:A1992HG14600013 ER PT J AU BRODSKY, SJ HOYER, P MUELLER, AH TANG, WK AF BRODSKY, SJ HOYER, P MUELLER, AH TANG, WK TI NEW QCD PRODUCTION MECHANISMS FOR HARD PROCESSES AT LARGE-X SO NUCLEAR PHYSICS B LA English DT Article ID HEAVY-QUARK PRODUCTION; QUANTUM CHROMODYNAMICS; INTRINSIC CHARM; PROTON; COLLISIONS; SCATTERING; NUCLEI AB We study the QCD production mechanisms for lepton and quark pairs of high mass M that carry a large fraction x of the projectile momentum, We show that the dominant contribution comes from peripheral processes in which low-x spectator quarks interact with the target, with the hardness scale of the collision being given by Q2 = M2(1 - x). In the high-M2 limit with fixed M2(1 - x) we identify new leading-order perturbative contributions from the hadron wave function which involve more than one constituent. These "intrinsic" contributions cannot be expressed in terms of the usual single-parton structure functions, implying a breakdown of QCD factorization. In a numerical study of a simple gauge theory model. we show that such contributions can dominate the standard single-parton factorizable terms. These results appear to explain several anomalies seen in the data: the excess production and the anomalous nuclear-number of dependence of open and bound charm at large x; the "cumulative" effects (x > 1) observed in hadron production from nuclei; and the large target-polarization asymmetry observed for hadron production at high x. The intrinsic multi-parton processes provide new mechanisms for the hadro-production of the J/psi directly in a color-singlet state and also for the production of heavy flavor systems in lepto-production at high momentum. C1 COLUMBIA UNIV, DEPT PHYS, NEW YORK, NY 10027 USA. UNIV HELSINKI, DEPT HIGH ENERGY PHYS, SF-00100 HELSINKI 10, FINLAND. RP STANFORD UNIV, STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94309 USA. NR 44 TC 114 Z9 114 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 EI 1873-1562 J9 NUCL PHYS B JI Nucl. Phys. B PD FEB 3 PY 1992 VL 369 IS 3 BP 519 EP 542 DI 10.1016/0550-3213(92)90278-J PG 24 WC Physics, Particles & Fields SC Physics GA HF630 UT WOS:A1992HF63000001 ER PT J AU BOTERO, J MACEK, JH AF BOTERO, J MACEK, JH TI THRESHOLD ANGULAR-DISTRIBUTIONS OF (E, 2E) CROSS-SECTIONS OF HELIUM-ATOMS SO PHYSICAL REVIEW LETTERS LA English DT Article ID ELECTRON-IMPACT IONIZATION; WANNIER THEORY; LAW; APPROXIMATION; COLLISIONS; CONTINUUM AB Cross sections for the electron-impact ionization of helium atoms in a coplanar symmetric geometry are computed by including in the Coulomb-Born approximation a normalization factor which approximately incorporates electron-electron interactions in the final-state wave function. This approximation yields excellent agreement with recent experimental observations at impact energies between 0.5 and 5 eV above the ionization threshold. It is shown that the angular distributions given by the present theory are in agreement with Wannier's threshold theory. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP BOTERO, J (reprint author), UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996, USA. NR 33 TC 37 Z9 37 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 3 PY 1992 VL 68 IS 5 BP 576 EP 579 DI 10.1103/PhysRevLett.68.576 PG 4 WC Physics, Multidisciplinary SC Physics GA HB528 UT WOS:A1992HB52800007 ER PT J AU PRATT, ST MCCORMACK, EF DEHMER, JL DEHMER, PM AF PRATT, ST MCCORMACK, EF DEHMER, JL DEHMER, PM TI FIELD-INDUCED ION-PAIR FORMATION IN MOLECULAR-HYDROGEN SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-LYING STATES; ROTATIONAL AUTOIONIZATION; ELECTRIC-FIELD; H-2; DISSOCIATION; IONIZATION; PHOTOIONIZATION; SPECTROSCOPY; CONTINUITY; THRESHOLD AB We present the first experimental results on the electric-field dependence of the threshold for ion-pair formation in a molecular system. The results were obtained for the process H-2 + hv --> H+ + H- by using a double-resonance excitation scheme via the E,F 1-SIGMA(g)+, upsilon = 6 level. The similarity of the long-range interaction in the ion-pair system with that of the electron-ion system leads to analogies between the field-induced process and the processes of field ionization and forced autoionization of Rydberg states of atoms. RP PRATT, ST (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 25 TC 41 Z9 41 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 3 PY 1992 VL 68 IS 5 BP 584 EP 587 DI 10.1103/PhysRevLett.68.584 PG 4 WC Physics, Multidisciplinary SC Physics GA HB528 UT WOS:A1992HB52800009 ER PT J AU TREBES, JE NUGENT, KA MROWKA, S LONDON, RA BARBEE, TW CARTER, MR KOCH, JA MACGOWAN, BJ MATTHEWS, DL DASILVA, LB STONE, GF FEIT, MD AF TREBES, JE NUGENT, KA MROWKA, S LONDON, RA BARBEE, TW CARTER, MR KOCH, JA MACGOWAN, BJ MATTHEWS, DL DASILVA, LB STONE, GF FEIT, MD TI MEASUREMENT OF THE SPATIAL COHERENCE OF A SOFT-X-RAY LASER SO PHYSICAL REVIEW LETTERS LA English DT Article ID PHOTOGRAPHIC FILMS; OPTICS AB The spatial coherence of a neonlike selenium x-ray laser operating at 206 and 210 angstrom has been measured using a technique based on partially coherent x-ray diffraction. The time-integrated spatial coherence of the selenium x-ray laser was determined to be equivalent to that of a quasimonochromatic spatially incoherent disk source whose diameter is comparable to the line focus of the visible-light laser pumping the x-ray laser. The spatial coherence was improved by narrowing the line focus width. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. UNIV MELBOURNE, PARKVILLE, VIC 3052, AUSTRALIA. RP TREBES, JE (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB, POB 5508, LIVERMORE, CA 94550 USA. RI Feit, Michael/A-4480-2009; Nugent, Keith/J-2699-2012; Nugent, Keith/I-4154-2016 OI Nugent, Keith/0000-0003-1522-8991; Nugent, Keith/0000-0002-4281-3478 NR 20 TC 77 Z9 77 U1 0 U2 6 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 3 PY 1992 VL 68 IS 5 BP 588 EP 591 DI 10.1103/PhysRevLett.68.588 PG 4 WC Physics, Multidisciplinary SC Physics GA HB528 UT WOS:A1992HB52800010 ER PT J AU ZONCA, F CHEN, L AF ZONCA, F CHEN, L TI RESONANT DAMPING OF TOROIDICITY-INDUCED SHEAR-ALFVEN EIGENMODES IN TOKAMAKS SO PHYSICAL REVIEW LETTERS LA English DT Article AB An analytical theory of toroidicity-induced shear-Alfven eigenmodes (TAE) is presented. The full two-dimensional problem is treated using a variational approach and the radial eigenmode structure is analyzed. We show that TAE suffer a significant damping due to the strong absorption occurring at the resonances with the shear-Alfven continuous spectrum. The resonant damping is shown to be larger than the electron Landau damping and therefore constitutes an important dissipation mechanism in determining the threshold for TAE instabilities driven by alpha and energetic particles in tokamak experiments. C1 EURATOM,ENTE NAZL ENERGIA ATOM FUS,ROME,ITALY. PRINCETON UNIV,DEPT ASTROPHYS SCI,PRINCETON,NJ 08543. RP ZONCA, F (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,PRINCETON,NJ 08543, USA. RI chen, liu/I-2297-2013; Zonca, Fulvio/I-8236-2016 OI Zonca, Fulvio/0000-0002-9270-4704 NR 11 TC 150 Z9 151 U1 0 U2 7 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 3 PY 1992 VL 68 IS 5 BP 592 EP 595 DI 10.1103/PhysRevLett.68.592 PG 4 WC Physics, Multidisciplinary SC Physics GA HB528 UT WOS:A1992HB52800011 ER PT J AU BEDROSSIAN, P KLITSNER, T AF BEDROSSIAN, P KLITSNER, T TI ANISOTROPIC VACANCY KINETICS AND SINGLE-DOMAIN STABILIZATION ON SI(100)-2X1 SO PHYSICAL REVIEW LETTERS LA English DT Article ID SCANNING-TUNNELING-MICROSCOPY; MOLECULAR-BEAM EPITAXY; SI(001) SURFACES; EQUILIBRIUM STRUCTURES; ION-BOMBARDMENT; GROWTH; SI; OSCILLATIONS; DIFFUSION; PT(111) AB Preferential annihilation of mobile surface vacancies at the ends, rather than the sides of dimer rows leads to a new, nonequilibrium, single-domain phase of Si(100) that is not accessible by epitaxial growth but is stable at moderate temperatures (T approximately 450-degrees-C). These results emerge from a tunneling microscope study of layer-by-layer removal of Si from Si(100) under 225-eV Xe-ion bombardment. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 21 TC 88 Z9 88 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 3 PY 1992 VL 68 IS 5 BP 646 EP 649 DI 10.1103/PhysRevLett.68.646 PG 4 WC Physics, Multidisciplinary SC Physics GA HB528 UT WOS:A1992HB52800025 ER PT J AU WANG, WB SHUM, K ALFANO, RR SZMYD, D NOZIK, AJ AF WANG, WB SHUM, K ALFANO, RR SZMYD, D NOZIK, AJ TI L6-X6 INTERVALLEY SCATTERING TIME AND DEFORMATION POTENTIAL FOR AL0.6GA0.4AS DETERMINED BY FEMTOSECOND TIME-RESOLVED INFRARED-ABSORPTION SPECTROSCOPY SO PHYSICAL REVIEW LETTERS LA English DT Article ID GAAS; RATES; SEMICONDUCTORS AB Hot electrons in Al0.6Ga0.4As were produced in the X6 valley from a photoexcited indirect transition by a 585-nm femtosecond pump pulse. The time evolution of the population of electrons in the bottom of the X6 valley was monitored by a femtosecond infrared probe pulse. The L6 --> X6 intervalley scattering time of approximately 200 fs and the L6-X6 intervalley deformation potential of approximately 2.7 x 1O(8) eV/cm were determined from the measured kinetic data. C1 CUNY GRAD SCH,NEW YORK,NY 10031. SOLAR ENERGY RES INST,GOLDEN,CO 80401. RP WANG, WB (reprint author), CUNY CITY COLL,INST ULTRAFAST SPECT & LASERS,DEPT PHYS & ELECT ENGN,NEW YORK,NY 10031, USA. NR 14 TC 13 Z9 13 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 3 PY 1992 VL 68 IS 5 BP 662 EP 665 DI 10.1103/PhysRevLett.68.662 PG 4 WC Physics, Multidisciplinary SC Physics GA HB528 UT WOS:A1992HB52800029 ER PT J AU LUO, J ORLANDO, TP GRAYBEAL, JM WU, XD MUENCHAUSEN, R AF LUO, J ORLANDO, TP GRAYBEAL, JM WU, XD MUENCHAUSEN, R TI SCALING OF THE LONGITUDINAL AND HALL RESISTIVITIES FROM VORTEX MOTION IN YBA2CU3O7 SO PHYSICAL REVIEW LETTERS LA English DT Article ID SUPERCONDUCTORS; TC AB We measure the longitudinal (rho(xx)) and Hall (rho(xy)) resistivities as a function of magnetic field and temperature in the mixed state of epitaxial YBa2Cu3O7 films. We observe a striking power-law behavior rho(xy)(T) is-proportional-to [p(xx)(T)] at fixed field, with alpha = 1.7 +/- 0.2. Our results link the Hall behavior to collective behavior in the presence of pinning. In addition, this power-law dependence is consistent with new calculations for the vortex-glass transition, and therein may provide the first measurement of a new critical exponent. C1 MIT,DEPT ELECT ENGN & COMP SCI,CAMBRIDGE,MA 02139. MIT,DEPT PHYS,CAMBRIDGE,MA 02139. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP LUO, J (reprint author), MIT,FRANCIS BITTER NATL MAGNET LAB,CAMBRIDGE,MA 02139, USA. NR 22 TC 125 Z9 128 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 3 PY 1992 VL 68 IS 5 BP 690 EP 693 DI 10.1103/PhysRevLett.68.690 PG 4 WC Physics, Multidisciplinary SC Physics GA HB528 UT WOS:A1992HB52800036 ER PT J AU BORSA, F RIGAMONTI, A CORTI, M ZIOLO, J HYUN, OB TORGESON, DR AF BORSA, F RIGAMONTI, A CORTI, M ZIOLO, J HYUN, OB TORGESON, DR TI MAGNETIC-FIELD EFFECT ON CU-63 NUCLEAR-RELAXATION RATES IN YBA2CU3O7 AND IN LA1.85SR0.15CUO4 ABOVE AND BELOW TC SO PHYSICAL REVIEW LETTERS LA English DT Article ID KNIGHT-SHIFTS; STATE; TMMC AB Nuclear electric quadrupole measurements of Cu-63 nuclear spin-lattice relaxation rates (R1) in zero applied magnetic field and nuclear magnetic resonance R1 in 8.2 T are reported for YBa2Cu3O7 and La1.85Sr0.15CuO4. A direct effect of the magnetic field is seen for the first time both above and below T(c). Above T(c) the effect is ascribed to the partial suppression of antiferromagnetic (AF) spin fluctuations. For T < T(c) the effect goes in the opposite sense and may be related to the spin-temperature diffusion from the core of the fluxons or to the enhancement of AF spin fluctuations persisting in the superconducting phase. C1 UNIV PAVIA,DEPT PHYS,I-27100 PAVIA,ITALY. UNIV PAVIA,DEPT PHYS A VOLTA,I-27100 PAVIA,ITALY. RP BORSA, F (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,DEPT PHYS & ASTRON,AMES,IA 50011, USA. NR 18 TC 40 Z9 40 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 3 PY 1992 VL 68 IS 5 BP 698 EP 701 DI 10.1103/PhysRevLett.68.698 PG 4 WC Physics, Multidisciplinary SC Physics GA HB528 UT WOS:A1992HB52800038 ER PT J AU DANIEL, M BISHOP, AR AF DANIEL, M BISHOP, AR TI NONLINEAR EXCITATIONS IN THE CLASSICAL CONTINUUM ANTIFERROMAGNETIC HEISENBERG SPIN CHAIN SO PHYSICS LETTERS A LA English DT Article ID FERROMAGNETS AB The nonlinear excitations in a one-dimensional classical isotropic continuum Heisenberg antiferromagnetic spin chain are studied by treating the chain as a two-sublattice problem. The dynamics is analyzed in detail at the lowest order, O(a) (with lattice constant a), of the continuum limit which involves only first derivatives. A general class of solutions is obtained for the equation of motion at this order. It is found that recently reported twist and instanton solutions are a special class of this general solution. The analysis is extended to the next higher order, O(a2), to investigate the effect of discreteness on the solutions obtained in the lowest order. C1 BHARATHIDASAN UNIV,DEPT PHYS,TIRUCHCHIRAPPALLI 620024,TAMIL NADU,INDIA. UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP DANIEL, M (reprint author), BHARATHIDASAN UNIV,CTR NONLINEAR DYNAM,TIRUCHCHIRAPPALLI 620024,TAMIL NADU,INDIA. OI M, DANIEL/0000-0003-3373-6914 NR 9 TC 6 Z9 6 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 J9 PHYS LETT A JI Phys. Lett. A PD FEB 3 PY 1992 VL 162 IS 2 BP 162 EP 166 DI 10.1016/0375-9601(92)90994-W PG 5 WC Physics, Multidisciplinary SC Physics GA HF343 UT WOS:A1992HF34300014 ER PT J AU BAY, B HANSEN, N HUGHES, DA KUHLMANNWILSDORF, D AF BAY, B HANSEN, N HUGHES, DA KUHLMANNWILSDORF, D TI OVERVIEW NO-96 - EVOLUTION OF FCC DEFORMATION STRUCTURES IN POLYSLIP SO ACTA METALLURGICA ET MATERIALIA LA English DT Article ID ENERGY DISLOCATION-STRUCTURES; COPPER SINGLE-CRYSTALS; CELL STRUCTURES; ARRAYS; ORIENTATION; ALUMINUM; STRESSES; PLANE AB The microstructural evolution during polyslip in f.c.c. metals is investigated by the examples of Al, Ni, Ni-Co alloys and an Al-Mg alloy, deformed at room temperature either by rolling or by torsion. The principles governing this evolution appears to be the following: (a) There are differences in the number and selection of simultaneously acting slip systems among neighboring volume elements of individual grains. In any one volume element (called a cell block), the number of slip systems falls short of that required for homogeneous (Taylor) deformation, but groups of neighboring cell blocks fulfil the Taylor criterion collectively. (b) The dislocations are trapped into low-energy dislocation structures in which neighbor dislocations mutually screen their stresses. The microstructural evolution at small strains progresses by the subdivision of grains into cell blocks delineated by dislocation boundaries. These boundaries accommodate the lattice misorientations, which result from glide on different slip system combinations in neighbouring cell blocks. The cell blocks are subdivided into ordinary cells and both cell blocks and cells shrink with increasing strain. All observations appear to be in good accord with the theoretical interpretation. However, some problems remain to be solved quantitatively. C1 RISO NATL LAB, DEPT MAT, DK-4000 ROSKILDE, DENMARK. SANDIA NATL LABS, DEPT MAT, LIVERMORE, CA 94550 USA. UNIV VIRGINIA, DEPT MAT SCI, CHARLOTTESVILLE, VA 22901 USA. RP BAY, B (reprint author), ENGN ACAD DENMARK, DEPT MECH ENGN, LYNGBY, DENMARK. NR 70 TC 647 Z9 661 U1 10 U2 106 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0956-7151 J9 ACTA METALL MATER JI Acta Metall. Mater. PD FEB PY 1992 VL 40 IS 2 BP 205 EP 219 DI 10.1016/0956-7151(92)90296-Q PG 15 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA GY716 UT WOS:A1992GY71600001 ER PT J AU MCCORMACK, M KHACHATURYAN, AG MORRIS, JW AF MCCORMACK, M KHACHATURYAN, AG MORRIS, JW TI A 2-DIMENSIONAL ANALYSIS OF THE EVOLUTION OF COHERENT PRECIPITATES IN ELASTIC MEDIA SO ACTA METALLURGICA ET MATERIALIA LA English DT Article ID CONSTRAINED SYSTEMS; SHAPE BIFURCATIONS; APPLIED STRESS; STABILITY; KINETICS; FIELD; ALLOYS; ENERGY; SOLIDS AB The morphological evolution of coherent inclusions in elastic media is studied in two-dimensions. The inclusions are simple dilations with isotropic surface energy in a system with homogeneous elastic constants of negative anisotropy. The equilibrium sizes at which a circular inclusion transforms to a rectangle or square, and at which a square splits into a doublet or quartet of separated inclusions are computed analytically. A finite-element model is then constructed to simulate the evolution of an arbitrary distribution of inclusions along the minimum-energy path. In the model, the circle evolves into a square, which splits into a doublet by hollowing from its center, or, if this is forbidden, by drawing in a perturbation on its surface. The sizes at which shapes spontaneously transform are compared to the equilibrium values. Finally, the simulation is used to study the evolution of a random distribution of inclusions. The first metastable state assumed by the distribution depends on the elastic interaction, surface energy and areal fraction of the inclusion phase through a single dimensionless parameter that groups these three effects. The results are compared to prior theoretical and experimental work on coarsening patterns in three dimensions. C1 UNIV CALIF BERKELEY, DEPT MAT SCI & MINERAL ENGN, BERKELEY, CA 94720 USA. RUTGERS STATE UNIV, DEPT MECH & MAT SCI, PISCATAWAY, NJ 08854 USA. RP MCCORMACK, M (reprint author), UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, CTR ADV MAT, BERKELEY, CA 94720 USA. NR 38 TC 54 Z9 55 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0956-7151 J9 ACTA METALL MATER JI Acta Metall. Mater. PD FEB PY 1992 VL 40 IS 2 BP 325 EP 336 DI 10.1016/0956-7151(92)90306-Y PG 12 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA GY716 UT WOS:A1992GY71600011 ER PT J AU NAMAZIAN, M KELLY, J SCHEFER, RW AF NAMAZIAN, M KELLY, J SCHEFER, RW TI CONCENTRATION IMAGING MEASUREMENTS IN TURBULENT CONCENTRIC-JET FLOWS SO AIAA JOURNAL LA English DT Article ID BLUFF-BODY; STABILIZED FLAMES AB Raman scattering images were used to determine the CH4 concentration in nonreacting concentric-jet flows. The flow consists of a central CH4 jet and a concentric air jet separated by a bluff body. Three jet velocity ratios were studied under isothermal conditions. At high momentum-flux ratios, the CH4 jet penetrates the recirculation zone formed by the airflow behind the bluff body. At low momentum ratios, the jet is stagnated and fuel is dispersed into the recirculation zone. The large-scale instantaneous boundary between the stagnated jet and the air is time varying and creates a sharp peak in the rms CH4 fluctuations in the stagnation region. Two-point spatial correlations were obtained over the flowfield to quantify the scale of the structures in these flows. Based on the limited data presented, it was found that the CH4 concentration field is similar for equal momentum-flux ratios. The CH4 concentration in the recirculation zone has a maximum at a momentum-flux ratio of unity, corresponding to the nearly penetrated case. In the nonpenetrated case, mixing of the central jet with surrounding air is substantially enhanced. Under these conditions, a considerable portion of the flowfield is mixed to conditions where combustion could occur. This enhanced mixing explains why bluff-body flames are more stable than jet flames into still air. C1 SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94550. RP NAMAZIAN, M (reprint author), ALTEX TECHNOL CORP,650 NUTMAN RD,SUITE 114,SANTA CLARA,CA 95054, USA. RI Schefer, Jurg/G-3960-2012 NR 31 TC 11 Z9 11 U1 0 U2 2 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0001-1452 J9 AIAA J JI AIAA J. PD FEB PY 1992 VL 30 IS 2 BP 384 EP 394 DI 10.2514/3.10929 PG 11 WC Engineering, Aerospace SC Engineering GA HE967 UT WOS:A1992HE96700014 ER PT J AU VILLASENOR, R CHEN, JY PITZ, RW AF VILLASENOR, R CHEN, JY PITZ, RW TI MODELING IDEALLY EXPANDED SUPERSONIC TURBULENT JET FLOWS WITH NONPREMIXED H2-AIR COMBUSTION SO AIAA JOURNAL LA English DT Article ID FLAMES AB A prediction model for a turbulent axisymmetric diffusion flame with equilibrium and nonequilibrium hydrogen-air kinetics is presented for supersonic jet flows. For the first time, turbulence-chemistry interactions are included in a supersonic combustion model. In the finite rate chemistry analysis, the fast shuffle reactions in the H-2-air reaction system are assumed to be in partial equilibrium and three-body recombination reactions are treated kinetically. The turbulence model consists of the Navier-Stokes equations in Favre-averaged form with a modified two-equation turbulence closure adapted for supersonic flows. The model uses probability density functions to describe fluctuations in both the mixture fraction and the reaction progress variable. Other relevant features of the supersonic code include a local convective Mach number that quantifies the compressibility effects and a thermodynamic table technique that speeds up the numerical computation. The model predictions are compared to probe measurements in a supersonic H-2-air jet flame by Beach. Comparison of the mixture fraction deduced from Beach's data to the model results indicates that the model predicts the turbulent mixing reasonably well. Predictions of the major species concentrations are nearly identical for the equilibrium and partial equilibrium models. The partial equilibrium model predicts substantial superequilibrium of the minor species and more closely predicts Beach's data than an earlier chemistry model based on eddy breakup. C1 SANDIA NATL LABS,TECH STAFF,LIVERMORE,CA 94550. RP VILLASENOR, R (reprint author), VANDERBILT UNIV,MECH ENGN,NASHVILLE,TN 37235, USA. RI Pitz, Robert/H-7868-2016 OI Pitz, Robert/0000-0001-6435-5618 NR 23 TC 9 Z9 9 U1 0 U2 4 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0001-1452 J9 AIAA J JI AIAA J. PD FEB PY 1992 VL 30 IS 2 BP 395 EP 402 DI 10.2514/3.10930 PG 8 WC Engineering, Aerospace SC Engineering GA HE967 UT WOS:A1992HE96700015 ER PT J AU SUTTON, SB ALBRECHT, GF ROBEY, HF AF SUTTON, SB ALBRECHT, GF ROBEY, HF TI HEAT REMOVAL IN A GAS-COOLED SOLID-STATE LASER DISK AMPLIFIER SO AIAA JOURNAL LA English DT Article AB The flow, heat transfer, and optical characteristics of the gas cooled slab solid-state disk laser geometry are experimentally and numerically addressed. Such a configuration has applications in solid-state laser fusion drivers. Data on viscous and thermal boundary-layer development in an asymmetrically heated channel are presented showing the large cooling variations that occur during thermal development. The flow related cooling variations are then directly related to optical distortions in the laser slab. It is shown that the flow can be properly conditioned such that the optical distortions due to cooling effects will be small enough to make average power solid-state laser fusion drivers possible. RP SUTTON, SB (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,ADV APPLICAT PROGRAM,POB 808,LIVERMORE,CA 94550, USA. NR 15 TC 5 Z9 5 U1 3 U2 5 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0001-1452 J9 AIAA J JI AIAA J. PD FEB PY 1992 VL 30 IS 2 BP 431 EP 435 DI 10.2514/3.10934 PG 5 WC Engineering, Aerospace SC Engineering GA HE967 UT WOS:A1992HE96700019 ER PT J AU SALIDO, EC YEN, PH KOPRIVNIKAR, K YU, LC SHAPIRO, LJ AF SALIDO, EC YEN, PH KOPRIVNIKAR, K YU, LC SHAPIRO, LJ TI THE HUMAN ENAMEL PROTEIN GENE AMELOGENIN IS EXPRESSED FROM BOTH THE X-CHROMOSOMES AND THE Y-CHROMOSOMES SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Article ID DEVELOPING BOVINE ENAMEL; AMINO-ACID-SEQUENCE; SEX-CHROMOSOMES; MESSENGER-RNA; TOOTH SIZES; DNA; MATRIX; FEMALES; MALES AB Amelogenins, a family of extracellular matrix proteins of the dental enamel, are transiently but abundantly expressed by ameloblasts during tooth development. Amelogenins seem to regulate the formation of crystallites during the secretory stage of enamel development, while they are specifically degraded during tooth-bud maturation. In this paper we report the characterization of the AMGX and AMGY genes on the short arms of the human X and Y chromosomes which encode the amelogenins. Our studies on the expression of the amelogenin genes in male developing tooth buds showed that both the AMGX and AMGY genes are transcriptionally active and encode potentially functional proteins. We have isolated genomic and cDNA clones from both the AMGX and AMGY loci and have studied the sequence organization of these two genes. Reverse transcriptase (RT)PCR amplification of the 5' portion of the amelogenin transcripts revealed several alternatively spliced products. The splicing pattern observed in the Y-derived mRNA varies from that of the X-derived mRNA. The promoter regions from both genes and the predicted amelogenin protein sequences are presented. This information will be useful for studying the molecular basis of X-linked amelogenesis imperfecta, for understanding the evolution and regulation of gene expression on the mammalian sex chromosomes, and for investigating the role of amelogenin genes during tooth development. C1 UNIV CALIF LOS ANGELES,LOS ANGELES CTY HARBOR MED CTR,SCH MED,HOWARD HUGHES MED INST,TORRANCE,CA 90509. UNIV CALIF LOS ANGELES,LOS ANGELES CTY HARBOR MED CTR,SCH MED,DEPT PEDIAT,TORRANCE,CA 90509. UNIV CALIF LOS ANGELES,LOS ANGELES CTY HARBOR MED CTR,SCH MED,DEPT BIOL CHEM,TORRANCE,CA 90509. FAC MED LA LAGUNA,DEPT PATHOL,LA LAGUNA,SPAIN. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DIV BIOMED SCI,LIVERMORE,CA 94550. RI Salido, Eduardo/I-2232-2015 OI Salido, Eduardo/0000-0001-9599-9854 FU NICHD NIH HHS [HD12178] NR 46 TC 238 Z9 248 U1 23 U2 49 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD FEB PY 1992 VL 50 IS 2 BP 303 EP 316 PG 14 WC Genetics & Heredity SC Genetics & Heredity GA HD001 UT WOS:A1992HD00100007 PM 1734713 ER PT J AU STROBL, K BAHNS, TL WILLHAM, L BISHARA, SE ORTH, D STWALLEY, WC AF STROBL, K BAHNS, TL WILLHAM, L BISHARA, SE ORTH, D STWALLEY, WC TI LASER-AIDED DEBONDING OF ORTHODONTIC CERAMIC BRACKETS SO AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS LA English DT Article ID INVITRO AB The removal of ceramic brackets from the enamel surface by means of laser heating was investigated with the use of CO2 and YAG lasers. The two bracket types investigated were polycrystalline alumina and monocrystalline alumina. The average torque force necessary to break the adhesive between the polycrystalline ceramic brackets and the tooth was lowered by a factor of 25 when the brackets were illuminated with a CO2 laser beam of 14 watts for 2 seconds. All polycrystalline brackets debonded with the CO2 laser resulted in a complete bracket detachment without bracket failure. The average torque force needed to debond monocrystalline brackets was lowered by a factor of 5.2 when illuminated with a laser setting of 7 watts. Monocrystalline brackets cracked along the bracket slot in 2 of 10 cases. Debracketing without laser heating resulted in a slightly higher incidence of bracket failure (12 of 50). Nevertheless, no visible damage to the enamel surface was observed. Advantages of the laser-aided bracket-removal techniques include the following: The heat produced is localized and controlled; the debracketing tool is essentially "cold"; and the method can be used for removal of various types of ceramic brackets, regardless of their design. C1 UNIV IOWA,COLL DENT,DEPT ORTHODONT,IOWA CITY,IA 52242. UNIV IOWA,CTR LASER SCI & ENGN,IOWA CITY,IA 52242. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87544. NR 8 TC 42 Z9 45 U1 0 U2 1 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 0889-5406 J9 AM J ORTHOD DENTOFAC JI Am. J. Orthod. Dentofac. Orthop. PD FEB PY 1992 VL 101 IS 2 BP 152 EP 158 DI 10.1016/0889-5406(92)70007-W PG 7 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA HD747 UT WOS:A1992HD74700011 PM 1531397 ER PT J AU CRAWFORD, FS AF CRAWFORD, FS TI MAGNETIC MONOPOLES, GALILEAN INVARIANCE, AND MAXWELL EQUATIONS SO AMERICAN JOURNAL OF PHYSICS LA English DT Article AB Maxwell's equations have space reserved for magnetic monopoles. Whether or not they exist in our part of the universe, monopoles provide a useful didactic tool to help us recognize relations among Maxwell's equations less easily apparent in the approach followed by many introductory textbooks, wherein Coulomb's law, Biot and Savart's law, Ampere's law, Faraday's law, Maxwell's displacement current, etc., are introduced independently, "as demanded by experiment." Instead a conceptual path is followed that deduces all of Maxwell's equations from the near-minimal set of assumptions: (a) Inertial frames exist, in which Newton's laws hold, to a first approximation; (b) the laws of electrodynamics are Galilean invariant-i.e., they have the same form in every inertial frame, to a first approximation; (c) magnetic poles (as well as the usual electric charges) exist; (d) the complete Lorentz force on an electric charge is known; (e) the force on a monopole at rest is known; (f) the Coulomb-like field produced by a resting electric charge and by a resting monopole are known. Everything else is deduced. History is followed in assumption that the Newtonian mechanics have been discovered, but not special relativity. (Only particle velocities-upsilon much less than c are considered.) This ends up with Maxwell's equations (Maxwell did not need special relativity, so why should we), but facing Einstein's paradox, the solution of which is encapsulated in the Einstein velocity-addition formula. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP CRAWFORD, FS (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 7 TC 11 Z9 11 U1 0 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0002-9505 J9 AM J PHYS JI Am. J. Phys. PD FEB PY 1992 VL 60 IS 2 BP 109 EP 114 DI 10.1119/1.16926 PG 6 WC Education, Scientific Disciplines; Physics, Multidisciplinary SC Education & Educational Research; Physics GA HA506 UT WOS:A1992HA50600007 ER PT J AU CRAWFORD, FS AF CRAWFORD, FS TI MUTUAL INDUCTANCE M12=M21 - AN ELEMENTARY DERIVATION SO AMERICAN JOURNAL OF PHYSICS LA English DT Note C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP CRAWFORD, FS (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 7 TC 2 Z9 2 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0002-9505 J9 AM J PHYS JI Am. J. Phys. PD FEB PY 1992 VL 60 IS 2 BP 186 EP 186 DI 10.1119/1.16941 PG 1 WC Education, Scientific Disciplines; Physics, Multidisciplinary SC Education & Educational Research; Physics GA HA506 UT WOS:A1992HA50600023 ER PT J AU TAYLOR, BE GABRIEL, W AF TAYLOR, BE GABRIEL, W TI TO GROW OR NOT TO GROW - OPTIMAL RESOURCE-ALLOCATION FOR DAPHNIA SO AMERICAN NATURALIST LA English DT Article ID OPTIMAL LIFE HISTORIES; ZOOPLANKTON; PLANTS; EVOLUTION; PATTERNS; MODEL; AGE AB We constructed a discrete-time model for growth and reproduction of the cladoceran Daphnia and solved it numerically for resource allocation patterns to maximize the intrinsic rate of increase r under various environmental conditions. Conditions modeled include different functional forms for the size dependencies of predation risk and net production. Growth after maturity can maximize r when net production and survival rate increase with body size. The optimal period for growth after maturity increases with the reproductive life span, but the life span need not be long to favor growth. The shape of the net production curve influences the extent to which body size is increased by delaying maturity or by growing after maturity. When net production increases with body size but survival rate does not, growth after maturity is not optimal. However, simultaneous allocation to growth and reproduction can occur in the instar (time step) preceding maturity. C1 MAX PLANCK INST LIMNOL,OKOPHYSIOL ABT,W-2320 PLON,GERMANY. RP TAYLOR, BE (reprint author), SAVANNAH RIVER ECOL LAB,DRAWER E,AIKEN,SC 29802, USA. NR 31 TC 99 Z9 102 U1 1 U2 19 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0003-0147 J9 AM NAT JI Am. Nat. PD FEB PY 1992 VL 139 IS 2 BP 248 EP 266 DI 10.1086/285326 PG 19 WC Ecology; Evolutionary Biology SC Environmental Sciences & Ecology; Evolutionary Biology GA HF464 UT WOS:A1992HF46400002 ER PT J AU MARTZ, HF ZIMMER, WJ AF MARTZ, HF ZIMMER, WJ TI THE RISK OF CATASTROPHIC FAILURE OF THE SOLID ROCKET BOOSTERS ON THE SPACE-SHUTTLE SO AMERICAN STATISTICIAN LA English DT Article ID BAYES EMPIRICAL BAYES; NONPARAMETRIC PROBLEMS; DIRICHLET PROCESSES; INFERENCE; MIXTURES AB The Challenger disaster evoked a national resolve to reduce the risk of future space flight tragedies. A part of that resolve was to estimate the present risks as accurately as possible. This article illustrates and compares several such ways of incorporating past experience into the process of estimating such risks. Failure data from five military solid rocket programs, as well as pre- and post-Challenger space shuttle data, are used in selected Bayes, empirical Bayes, and Bayes empirical Bayes methods. The derived posterior distributions are used to estimate the required probability of catastrophic failure of the solid rocket boosters on the space shuttle for the Galileo mission, which occurred in October 1989. The point estimates are in fairly close agreement, while the credibility intervals differ substantially. We estimate the probability of catastrophic failure to be 1/60 with 90% credibility interval of 1/578 to 1/21. C1 UNIV NEW MEXICO,DEPT MATH & STAT,ALBUQUERQUE,NM 87131. RP MARTZ, HF (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,TECH STAFF,LOS ALAMOS,NM 87544, USA. NR 34 TC 10 Z9 10 U1 0 U2 9 PU AMER STATISTICAL ASSOC PI ALEXANDRIA PA 1429 DUKE ST, ALEXANDRIA, VA 22314 SN 0003-1305 J9 AM STAT JI Am. Stat. PD FEB PY 1992 VL 46 IS 1 BP 42 EP 47 DI 10.2307/2684410 PG 6 WC Statistics & Probability SC Mathematics GA HB062 UT WOS:A1992HB06200011 ER PT J AU MASSIE, NA OSTER, Y POE, G SEPPALA, L SHAO, M AF MASSIE, NA OSTER, Y POE, G SEPPALA, L SHAO, M TI LOW-COST, HIGH-RESOLUTION, SINGLE-STRUCTURE ARRAY TELESCOPES FOR IMAGING OF LOW-EARTH-ORBIT SATELLITES SO APPLIED OPTICS LA English DT Article ID STELLAR SPECKLE INTERFEROMETRY AB Telescopes that are designed for the unconventional imaging of near-Earth satellites must follow unique design rules. The costs must be reduced substantially over those of the conventional telescope designs, and the design must accommodate a technique to circumvent atmospheric distortion of the image. Apertures of 12 m and more along with altitude-altitude mounts that provide high tracking rates are required. A novel design for such a telescope, optimized for speckle imaging, has been generated. Its mount closely resembles a radar mount, and it does not use the conventional dome. Costs for this design are projected to be considerably lower than those for the conventional designs. Results of a design study are presented with details of the electro-optical and optical designs. C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. DAEDALUS,DEL MAR,CA 92014. RP MASSIE, NA (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 18 TC 3 Z9 3 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD FEB 1 PY 1992 VL 31 IS 4 BP 447 EP 456 PG 10 WC Optics SC Optics GA HB566 UT WOS:A1992HB56600015 PM 20720634 ER PT J AU CHEN, G HAIRE, RG PETERSON, JR AF CHEN, G HAIRE, RG PETERSON, JR TI EU3+ ION LUMINESCENCE SPECTRA FROM LANTHANIDE SESQUIOXIDES EXHIBITING 3 DIFFERENT CRYSTAL-STRUCTURES SO APPLIED SPECTROSCOPY LA English DT Article DE ANALYSIS FOR CRYSTAL STRUCTURE; EMISSION SPECTROSCOPY; FLUORESCENCE; LUMINESCENCE; ANALYTICAL METHODS; SPECTROSCOPIC TECHNIQUES AB We have investigated the Eu3+ ion luminescence spectra from different host crystals of the lanthanide sesquioxides exhibiting either the A, B, or C form. The Eu3+ ion luminescence spectra from B-type Eu2O3 and from Eu3+-doped A-type La2O3 and C-type Lu2O3 were obtained at room temperature. It is suggested that the luminescence from f-f transitions in the Eu3+ ion can be used to determine the crystal structure, because the different Eu3+ ion site symmetries in the different crystal structures give rise to different characteristic spectral splitting patterns. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV CHEM,TRANSURANIUM RES LAB,OAK RIDGE,TN 37831. NR 10 TC 15 Z9 15 U1 0 U2 5 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA 201B BROADWAY ST, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD FEB PY 1992 VL 46 IS 2 BP 273 EP 276 DI 10.1366/0003702924125483 PG 4 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA HE080 UT WOS:A1992HE08000017 ER PT J AU SMYRL, NR HEMBREE, DM DAVIS, WE WILLIAMS, DM VANCE, JC AF SMYRL, NR HEMBREE, DM DAVIS, WE WILLIAMS, DM VANCE, JC TI SIMULTANEOUS GC-FT-IR GC-MS ANALYSIS FOR ISOMER-SPECIFIC IDENTIFICATION AND QUANTITATION OF COMPLEX MIXTURE COMPONENTS SO APPLIED SPECTROSCOPY LA English DT Article DE FT-IR; GC-MS; HYPHENATED METHODS; COAL EXTRACTION; PAHS; ISOMER IDENTIFICATION ID TRANSFORM INFRARED SPECTROMETRY; GAS-CHROMATOGRAPHY; SPECTROSCOPY AB The construction and capabilities of a new instrument combining infrared and mass spectrometry to simultaneously examine the effluent from a single capillary column gas chromatographic injection are described. Gas chromatography-mass spectrometry (GC-MS) is performed in the conventional manner. However, the Fourier transform infrared (FT-IR) portion of the instrument employs a new sampling method involving low-temperature trapping of the effluent from the gas chromatograph. The mass spectrometer was over two orders of magnitude more sensitive (161 fg detection limit for naphthalene) than the infrared (40 pg). The qualitative capabilities of infrared spectrometry, particularly when isomer-specific identifications are necessary, are shown to be highly complementary to the usual GC-MS method for analyzing complex mixtures. RP SMYRL, NR (reprint author), MARTIN MARIETTA ENERGY SYST INC,DIV QUAL SERV,PLANT LAB,OAK RIDGE Y-12 PLANT,OAK RIDGE,TN 37831, USA. NR 16 TC 22 Z9 22 U1 0 U2 2 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA 201B BROADWAY ST, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD FEB PY 1992 VL 46 IS 2 BP 277 EP 282 DI 10.1366/0003702924125636 PG 6 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA HE080 UT WOS:A1992HE08000018 ER PT J AU WANGMANEERAT, B MCGUIRE, JA NIEMCZYK, TM HAALAND, DM LINN, JH AF WANGMANEERAT, B MCGUIRE, JA NIEMCZYK, TM HAALAND, DM LINN, JH TI QUANTITATIVE INFRARED-EMISSION SPECTROSCOPY OF PHOSPHOSILICATE GLASS ON SILICON-WAFERS USING MULTIVARIATE CALIBRATION SO APPLIED SPECTROSCOPY LA English DT Article DE INFRARED EMISSION SPECTROSCOPY; MULTIVARIATE CALIBRATION; PARTIAL LEAST-SQUARES ID LEAST-SQUARES METHODS; SPECTRAL ANALYSES; SURFACE; SAMPLES AB Phosphosilicate glass (PSG) is widely used in the microelectronics industry as a dielectric thin film. Determination of phosphorus concentration in these films is important for quality control. Data are presented here indicating that infrared emission spectroscopy combined with multivariate calibration can produce concentration determinations with a precision comparable to that of the electron microprobe reference method. Partial least-squares multivariate calibration methods applied to infrared emission spectra of twelve calibration standards of PSG films on silicon wafers at 225-degrees-C yielded a cross-validated standard error of prediction of 0.11 wt % P. It was found that the precisions of the phosphorus determinations were comparable for the use of absorbance spectra, single-beam emission spectra, or single-beam emission spectra ratioed to a blackbody at the same temperature. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. HARRIS SEMICOND INC,MELBOURNE,FL 32901. NR 24 TC 11 Z9 11 U1 1 U2 2 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA 201B BROADWAY ST, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD FEB PY 1992 VL 46 IS 2 BP 340 EP 344 DI 10.1366/0003702924125546 PG 5 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA HE080 UT WOS:A1992HE08000025 ER PT J AU DAI, S YOUNG, JP BEGUN, GM MAMANTOV, G AF DAI, S YOUNG, JP BEGUN, GM MAMANTOV, G TI TEMPERATURE-MEASUREMENT BY OBSERVATION OF THE RAMAN-SPECTRUM OF DIAMOND SO APPLIED SPECTROSCOPY LA English DT Note DE RAMAN SPECTROSCOPY; TEMPERATURE MEASUREMENT; DIAMONDS ID DEPENDENCE C1 OAK RIDGE NATL LAB,DIV ANALYT CHEM,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. RI Dai, Sheng/K-8411-2015 OI Dai, Sheng/0000-0002-8046-3931 NR 13 TC 8 Z9 8 U1 0 U2 1 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA 201B BROADWAY ST, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD FEB PY 1992 VL 46 IS 2 BP 375 EP 377 DI 10.1366/0003702924125654 PG 3 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA HE080 UT WOS:A1992HE08000031 ER PT J AU DAI, S YOUNG, JP MAMANTOV, G WANG, JT WILLIAMS, F AF DAI, S YOUNG, JP MAMANTOV, G WANG, JT WILLIAMS, F TI MEASUREMENT OF RADICAL CATION UV-VISIBLE SPECTRA IN A POLYCRYSTALLINE FREON MATRIX AT LIQUID-NITROGEN TEMPERATURE BY DIFFUSE REFLECTANCE SPECTROSCOPY SO APPLIED SPECTROSCOPY LA English DT Note DE DIFFUSE REFLECTANCE; RADICAL CATIONS; UV-VISIBLE SPECTROSCOPY C1 OAK RIDGE NATL LAB,DIV ANALYT CHEM,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. RI Williams, Ffrancon/E-4893-2011; Dai, Sheng/K-8411-2015 OI Dai, Sheng/0000-0002-8046-3931 NR 12 TC 1 Z9 1 U1 0 U2 1 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA 201B BROADWAY ST, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD FEB PY 1992 VL 46 IS 2 BP 377 EP 378 DI 10.1366/0003702924125627 PG 2 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA HE080 UT WOS:A1992HE08000032 ER PT J AU FERRARO, JR AF FERRARO, JR TI THE ON-GOING EFFORT TO ESTABLISH A MUSEUM OF SPECTROSCOPY SO APPLIED SPECTROSCOPY LA English DT Editorial Material RP FERRARO, JR (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA 201B BROADWAY ST, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD FEB PY 1992 VL 46 IS 2 BP A16 EP A16 PG 1 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA HE080 UT WOS:A1992HE08000002 ER PT J AU ROSE, SL AF ROSE, SL TI EMERGING LEGAL CONCERNS IN INDOOR AIR-QUALITY SO ASHRAE JOURNAL-AMERICAN SOCIETY OF HEATING REFRIGERATING AND AIR-CONDITIONING ENGINEERS LA English DT Article RP ROSE, SL (reprint author), US DOE,OFF ENERGY RES,RADON PROGRAM,WASHINGTON,DC 20545, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC HEAT REFRIG AIR- CONDITIONING ENG INC PI ATLANTA PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 SN 0001-2491 J9 ASHRAE J JI ASHRAE J.-Am. Soc. Heat Refrig. Air-Cond. Eng. PD FEB PY 1992 VL 34 IS 2 BP 25 EP 25 PG 1 WC Thermodynamics; Construction & Building Technology; Engineering, Mechanical SC Thermodynamics; Construction & Building Technology; Engineering GA HF141 UT WOS:A1992HF14100006 ER PT J AU BECKER, RH WHITE, RL PROCTOR, DD AF BECKER, RH WHITE, RL PROCTOR, DD TI A SERENDIPITOUS SURVEY OF THE GALACTIC PLANE FOR TYPE-II OH MASERS SO ASTRONOMICAL JOURNAL LA English DT Article ID CATALOG; STARS AB We have surveyed a 140 deg strip along the Galactic plane with the VLA for OH masers. Fifty OH masers, including 14 new sources, were detected. The masers have a very narrow distribution in Galactic latitude and are probably Population I objects. A study of the IRAS counterparts to OH masers from this and other surveys reveals a strong correlation between the infrared colors of OH masers and Galactic latitude. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94550. SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. RP BECKER, RH (reprint author), UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616, USA. NR 12 TC 9 Z9 9 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD FEB PY 1992 VL 103 IS 2 BP 544 EP 548 DI 10.1086/116081 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HB494 UT WOS:A1992HB49400017 ER PT J AU SHAW, GE SLINN, WGN AF SHAW, GE SLINN, WGN TI CLIMATE COOLED BY PARTICLES AND CLOUDS SO ATMOSPHERIC ENVIRONMENT PART A-GENERAL TOPICS LA English DT Editorial Material C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. RP SHAW, GE (reprint author), UNIV ALASKA, INST GEOPHYS, FAIRBANKS, AK 99701 USA. NR 0 TC 1 Z9 1 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0004-6981 J9 ATMOS ENVIRON A-GEN PD FEB PY 1992 VL 26 IS 3 BP 522 EP 522 PG 1 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA GY718 UT WOS:A1992GY71800016 ER PT J AU JANKOWIAK, R AF JANKOWIAK, R TI HETEROGENEOUS DISTRIBUTIONS AND DISPERSIVE PHOTODISSOCIATION RATES OF BENZO[A]PYRENE DIOL-EPOXIDE ENANTIOMER DNA AND ENANTIOMER APOLY(DG-DC).POLY(DG-DC) ADDUCTS SO BIOPHYSICAL CHEMISTRY LA English DT Article DE BENZO[A]PYRENE DIOL EPOXIDE, DNA ADDUCT; POLYNUCLEOTIDE ADDUCT; PHOTODISSOCIATION; CONFORMATION; DISPERSION ID HOLE-BURNING SPECTROSCOPY; AMORPHOUS SOLIDS; TEMPERATURE; KINETICS; BINDING; 9,10-EPOXIDES; RELAXATION; RESONANCE; TETRACENE; TRANSIENT AB Two types of heterogeneity of adducts are illustrated and discussed utilizing non-line narrowed (S2 <-- S0 laser excitation) and line-narrowed (excitation into the (0,0) origin band) fluorescence spectra at low temperatures. The first type (type A) is due to structurally distinct and/or energetically inequivalent conformers. The second one (type B) is provided by an inhomogeneous environment of DNA and polynucleotides. In light of the above, the non-exponential photodissociation kinetics of the (+/-)-anti-BPDE-DNA and -polynucleotide adducts have been reanalyzed in terms of a dispersive first order chemical reaction, where the inhomogeneous effects are explicitly included. It is demonstrated that the DNA structure shows considerable inhomogeneous broadening, and that type B heterogeneity is responsible for the dispersive photodissociation process. The latter is accounted for by a Gaussian distribution of activation energies, with the center of the distribution at approximately 600 meV and the full width at half-maximum equal to approximately 50 meV (approximately 2 kT). Photolabile (+/-)-anti-BPDE-DNA and -polynucleotide adducts are identified as quasi-intercalated (site 1) (+)- and (-)-cis-BPDE. The calculated concentrations of cis-BPDE adducts in DNA and polynucleotides from the kinetic data are in very good agreement with the cis-BPDE adduct concentrations obtained from the spectral and/or chemical analysis. The average photodissociation rate and the photodissociation quantum yield of cis- and trans-BPDE adducts are also estimated. RP JANKOWIAK, R (reprint author), IOWA STATE UNIV SCI & TECHNOL, US DOE, AMES LAB, AMES, IA 50011 USA. NR 48 TC 5 Z9 5 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0301-4622 J9 BIOPHYS CHEM JI Biophys. Chem. PD FEB PY 1992 VL 42 IS 2 BP 133 EP 146 DI 10.1016/0301-4622(92)85003-M PG 14 WC Biochemistry & Molecular Biology; Biophysics; Chemistry, Physical SC Biochemistry & Molecular Biology; Biophysics; Chemistry GA HG732 UT WOS:A1992HG73200003 PM 1567987 ER PT J AU CARR, DB AF CARR, DB TI DISCRIMINATION USING SPECTRAL SLOPES AT FREQUENCIES UP TO 50-HZ SO BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA LA English DT Article ID EARTHQUAKES; EXPLOSIONS AB The spectral characteristics of regional Pn waves recorded at the High Frequency Seismic Element (HFSE) at the NORESS array in southern Norway are investigated to determine if spectral slope can be used to discriminate between earthquakes and chemical explosions. Displacement spectra are calculated for 134 events in southern Norway that include 36 known earthquakes and 36 known chemical explosions. Events range in distance from 230 to 620 km, and most have signal above the noise at frequencies over 30 Hz. The average frequency at the peak signal-to-noise ratio (SNR) is 15.5 Hz. Spectral slopes are measured on a displacement spectrum calculated with a 2-sec window. The slopes range between omega-1.8 and omega-5.1, and there is no strong evidence that the slope steepens with distance for this data set. According to one theory, earthquakes should have steeper slopes than explosions, but when this data set is separated into earthquakes and explosions we do not see separation between sources with respect to the slope of the spectrum. Both source types have events with the same range of spectral slopes, and the mean slopes and standard deviations are similar. Spectra of events at the same locations are often similar. However, explosions from the Blasjo Mine in western Norway show variability in the spectral slope. Since the path and distance to HFSE are the same for these events, the variability must be due to differences in the source mechanism. For a set of small earthquakes, however, the observed variability in spectral slopes appears to be more related to distance and path effects. Therefore, we observe as much variation in spectral slope for one source type as there is between source types. The time window over which the spectrum is calculated is varied from 1 to 8 sec to determine if a time window consisting of a pure Pn wave was required to discriminate between source types. Spectral slope usually decreases as the window extends deeper into the coda and the energy content of the signal changes. The slopes also become more stable and more reliable as longer windows are used. However, source discrimination is not possible with any time window. RP CARR, DB (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 12 TC 2 Z9 2 U1 0 U2 0 PU SEISMOLOGICAL SOC AMER PI EL CERRITO PA PLAZA PROFESSIONAL BLDG, SUITE 201, EL CERRITO, CA 94530 SN 0037-1106 J9 B SEISMOL SOC AM JI Bull. Seismol. Soc. Amer. PD FEB PY 1992 VL 82 IS 1 BP 337 EP 351 PG 15 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA HC008 UT WOS:A1992HC00800019 ER PT J AU HOFFMAN, GG HARRIS, RA PRATT, LR AF HOFFMAN, GG HARRIS, RA PRATT, LR TI STATISTICAL-THEORY OF ELECTRON-DENSITIES AT NONZERO TEMPERATURES SO CANADIAN JOURNAL OF CHEMISTRY LA English DT Article DE PLASMA SIMULATION; PLASMA CHEMISTRY; STATISTICAL THEORY OF ELECTRON DENSITIES; THOMAS-FERMI THEORY; OPTIMIZED THOMAS-FERMI THEORY ID THOMAS-FERMI APPROXIMATION; SAHA EQUATION; PROPAGATORS; PLASMA; KOHN AB This paper derives the finite temperature optimized Thomas-Fermi theory applicable to the electronic structure of atoms, molecules, and ions under conditions where both thc bulk electron density and the electron temperature are substantial. The derivation provides a simple rule for transcribing the finite temperature case from the previous ground-state statistical electron-density functional theories. C1 LOS ALAMOS NATL LAB, DIV CHEM & LASER SCI, LOS ALAMOS, NM 87545 USA. FLORIDA INT UNIV, DEPT CHEM, MIAMI, FL 33199 USA. UNIV CALIF BERKELEY, DEPT CHEM, BERKELEY, CA 94720 USA. RI Pratt, Lawrence/H-7955-2012 OI Pratt, Lawrence/0000-0003-2351-7451 NR 33 TC 1 Z9 1 U1 0 U2 4 PU CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS PI OTTAWA PA 65 AURIGA DR, SUITE 203, OTTAWA, ON K2E 7W6, CANADA SN 0008-4042 EI 1480-3291 J9 CAN J CHEM JI Can. J. Chem. PD FEB PY 1992 VL 70 IS 2 BP 478 EP 481 DI 10.1139/v92-068 PG 4 WC Chemistry, Multidisciplinary SC Chemistry GA JD653 UT WOS:A1992JD65300030 ER PT J AU SHARAFEDDIN, OA KOURI, DJ HOFFMAN, DK AF SHARAFEDDIN, OA KOURI, DJ HOFFMAN, DK TI TIME-DEPENDENT TREATMENT OF SCATTERING - POTENTIAL REFERENCED AND KINETIC-ENERGY REFERENCED MODIFIED CAYLEY APPROACHES TO ATOM DIATOM COLLISIONS AND TIME-SCALE SEPARATIONS SO CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE LA English DT Article DE MOLECULAR COLLISIONS; MULTIPLE TIME SCALES; QUANTUM DYNAMICS ID WAVE-PACKET APPROACH; MOLECULE SURFACE SCATTERING; QUANTUM-MECHANICAL CALCULATIONS; COLLINEAR H+H2 REACTION; FOURIER METHOD SOLUTION; + BC COLLISION; SCHRODINGER-EQUATION; PHOTODISSOCIATION DYNAMICS; INTERACTION REPRESENTATION; EMISSION-SPECTROSCOPY AB The time-dependent Lippmann-Schwinger equation describing atom-diatom collisions is expressed in terms of a general reference Hamiltonian, H(r), whose dynamics are easily solved in one representation, and a corresponding disturbance Hamiltonian, H(d), whose dynamics are easily solved in a different representation. The wavefunction at time t + tau is then expressed in terms of its value at a previous time t by means of a simple quadrature approximation. The resulting expression for psi(t + tau) has a form similar to that occurring in earlier numerical unitary solutions to the time-dependent Schrodinger equation via a Cayley transformation. The structure of the new equations is made explicit for (a) the choice where H(r) is taken to be the kinetic energy and H(d) is the potential energy and (b) the choice where H(r) is taken to be the potential energy and H(d) is the kinetic energy. In addition, we also deal with several alteratives for treating the binding potential of the diatom. Several alteratives for choosing representations are then explored for reducing the equations to a form amenable to computation. The short time structure of the equations is discussed in terms of a multiple time-scales analysis. C1 UNIV HOUSTON,DEPT PHYS,HOUSTON,TX 77204. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP SHARAFEDDIN, OA (reprint author), UNIV HOUSTON,DEPT CHEM,HOUSTON,TX 77204, USA. NR 111 TC 1 Z9 1 U1 0 U2 0 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0008-4042 J9 CAN J CHEM JI Can. J. Chem.-Rev. Can. Chim. PD FEB PY 1992 VL 70 IS 2 BP 686 EP 692 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA JD653 UT WOS:A1992JD65300053 ER PT J AU ENGELMANN, RJ AF ENGELMANN, RJ TI ATMOSPHERIC RESEARCH SO CHEMICAL ENGINEERING PROGRESS LA English DT Letter RP ENGELMANN, RJ (reprint author), OAK RIDGE ASSOCIATED UNIV,1019 19TH ST NW,7TH FLOOR,WASHINGTON,DC 20036, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER INST CHEMICAL ENGINEERS PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0360-7275 J9 CHEM ENG PROG JI Chem. Eng. Prog. PD FEB PY 1992 VL 88 IS 2 BP 10 EP 10 PG 1 WC Engineering, Chemical SC Engineering GA HD880 UT WOS:A1992HD88000005 ER PT J AU BU, X KRAUSS, R PUPPIONE, D GRAY, R ROTTER, JI AF BU, X KRAUSS, R PUPPIONE, D GRAY, R ROTTER, JI TI QUANTITATIVE SEGREGATION ANALYSIS OF ATHEROGENIC LIPOPROTEIN PHENOTYPE (ALP) IN 20 CORONARY-ARTERY DISEASE (CAD) PEDIGREES SO CLINICAL RESEARCH LA English DT Meeting Abstract C1 CEDARS SINAI MED CTR,DEPT MED,LOS ANGELES,CA 90048. CEDARS SINAI MED CTR,DEPT PEDIAT,LOS ANGELES,CA 90048. UNIV CALIF LOS ANGELES,DEPT CHEM & BIOCHEM,LOS ANGELES,CA 90024. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SLACK INC PI THOROFARE PA 6900 GROVE RD, THOROFARE, NJ 08086 SN 0009-9279 J9 CLIN RES JI Clin. Res. PD FEB PY 1992 VL 40 IS 1 BP A44 EP A44 PG 1 WC Medicine, Research & Experimental SC Research & Experimental Medicine GA HA103 UT WOS:A1992HA10300236 ER PT J AU ELLISON, JW PASSAGE, MB YU, LC YEN, PH MOHANDAS, TK SHAPIRO, LJ AF ELLISON, JW PASSAGE, MB YU, LC YEN, PH MOHANDAS, TK SHAPIRO, LJ TI DIRECTED ISOLATION OF HUMAN GENES THAT ESCAPE X-INACTIVATION SO CLINICAL RESEARCH LA English DT Meeting Abstract C1 UNIV CALIF LOS ANGELES,LOS ANGELES CTY HARBOR MED CTR,HOWARD HUGHES MED INST,TORRANCE,CA 90509. UNIV CALIF LOS ANGELES,LOS ANGELES CTY HARBOR MED CTR,DEPT PEDIAT,TORRANCE,CA 90509. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SLACK INC PI THOROFARE PA 6900 GROVE RD, THOROFARE, NJ 08086 SN 0009-9279 J9 CLIN RES JI Clin. Res. PD FEB PY 1992 VL 40 IS 1 BP A9 EP A9 PG 1 WC Medicine, Research & Experimental SC Research & Experimental Medicine GA HA103 UT WOS:A1992HA10300049 ER PT J AU LARABELL, CA FUKUYAMA, K AF LARABELL, CA FUKUYAMA, K TI DESMOSOME DIFFERENTIATION AND CORNIFICATION IN EPIDERMIS - NEW OBSERVATIONS OBTAINED FROM INTERMEDIATE VOLTAGE ELECTRON-MICROSCOPY SO CLINICAL RESEARCH LA English DT Meeting Abstract C1 UNIV CALIF SAN FRANCISCO,DEPT DERMATOL,SAN FRANCISCO,CA 94143. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 1 PU SLACK INC PI THOROFARE PA 6900 GROVE RD, THOROFARE, NJ 08086 SN 0009-9279 J9 CLIN RES JI Clin. Res. PD FEB PY 1992 VL 40 IS 1 BP A136 EP A136 PG 1 WC Medicine, Research & Experimental SC Research & Experimental Medicine GA HA103 UT WOS:A1992HA10300736 ER PT J AU NEWMAN, RS NEWMAN, LA LARABELL, CA INA, Y SATO, N EPSTEIN, WL AF NEWMAN, RS NEWMAN, LA LARABELL, CA INA, Y SATO, N EPSTEIN, WL TI EFFECTS OF MATRIGEL ON MOUSE PERITONEAL-MACROPHAGES IN CULTURE SO CLINICAL RESEARCH LA English DT Meeting Abstract C1 UNIV CALIF SAN FRANCISCO,DEPT DERMATOL,SAN FRANCISCO,CA 94143. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,INTERMEDIATE VOLTAGE ELECTRON MICROSCOPE FACIL,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 1 PU SLACK INC PI THOROFARE PA 6900 GROVE RD, THOROFARE, NJ 08086 SN 0009-9279 J9 CLIN RES JI Clin. Res. PD FEB PY 1992 VL 40 IS 1 BP A15 EP A15 PG 1 WC Medicine, Research & Experimental SC Research & Experimental Medicine GA HA103 UT WOS:A1992HA10300079 ER PT J AU JOHNSON, RW MACKINNON, RJ AF JOHNSON, RW MACKINNON, RJ TI AN AUXILIARY EQUATION METHOD FOR OBTAINING SUPERCONVERGENT FINITE-ELEMENT APPROXIMATIONS SO COMMUNICATIONS IN APPLIED NUMERICAL METHODS LA English DT Article ID DIFFERENCE AB A finite-element method is developed which improves accuracy and yields superconvergent approximations to two-dimensional elliptic boundary-value problems on a union of square bilinear elements. This method employs an auxiliary equation which is derived using a Taylor series analysis on the discrete formula obtained from a Galerkin finite-element formulation. Application of the finite-element method to the auxiliary equation results in O(h4) convergence for problems with constant coefficients and improved accuracy for problems with variable coefficients. Supporting numerical examples are given. RP JOHNSON, RW (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 5 TC 3 Z9 3 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0748-8025 J9 COMMUN APPL NUMER M PD FEB PY 1992 VL 8 IS 2 BP 99 EP 107 DI 10.1002/cnm.1630080205 PG 9 WC Engineering, Multidisciplinary; Mathematics, Applied SC Engineering; Mathematics GA HF550 UT WOS:A1992HF55000004 ER PT J AU FRANKLIN, MJ WHITE, DC ISAACS, HS AF FRANKLIN, MJ WHITE, DC ISAACS, HS TI A STUDY OF CARBON-STEEL CORROSION INHIBITION BY PHOSPHATE IONS AND BY AN ORGANIC BUFFER USING A SCANNING VIBRATING ELECTRODE SO CORROSION SCIENCE LA English DT Article AB The scanning vibrating reference electrode technique (SVET) has been used to map anodic and cathodic currents in solutions over freely corroding type C1020 carbon steel. All solutions contained millimolar concentrations of chloride and were sterilized. The effect of phosphate and an organic buffer on the corrosion of carbon steel in liquid media were studied because they were added to promote bacterial growth. Phosphate acted as an anodic inhibitor in the media, causing initiated pits to repassivate. If initiated pits did not repassivate, for example in a stagnant medium or when crevice corrosion initiated adjacent to the sample coating, the corrosion rates increased and the corrosion remained localized. Increased anodic current resulted in a drop in the open circuit potential and a decrease in the polarization resistance. The results show that phosphate can lead to lower average corrosion rates, than uninhibited steel, but as an anodic inhibitor can also lead to rapid penetration at localized sites. C1 UNIV TENNESSEE,INST APPL MICROBIOL,KNOXVILLE,TN 37932. OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. RP FRANKLIN, MJ (reprint author), UNIV TENNESSEE,DEPT MICROBIOL,KNOXVILLE,TN 37996, USA. NR 14 TC 33 Z9 35 U1 3 U2 19 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0010-938X J9 CORROS SCI JI Corrosion Sci. PD FEB PY 1992 VL 33 IS 2 BP 251 EP 260 DI 10.1016/0010-938X(92)90149-W PG 10 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA GZ513 UT WOS:A1992GZ51300008 ER PT J AU NICHOLS, DJ BROWN, JL ATTREP, M ORTH, CJ AF NICHOLS, DJ BROWN, JL ATTREP, M ORTH, CJ TI A NEW CRETACEOUS TERTIARY BOUNDARY LOCALITY IN THE WESTERN POWDER RIVER BASIN, WYOMING - BIOLOGICAL AND GEOLOGICAL IMPLICATIONS SO CRETACEOUS RESEARCH LA English DT Article DE CRETACEOUS TERTIARY BOUNDARY; EXTINCTION; PALYNOMORPHS; IRIDIUM ID MONTANA C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP NICHOLS, DJ (reprint author), US GEOL SURVEY,MS 919,BOX 25046,DENVER,CO 80225, USA. NR 33 TC 29 Z9 32 U1 0 U2 2 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0195-6671 J9 CRETACEOUS RES JI Cretac. Res. PD FEB PY 1992 VL 13 IS 1 BP 3 EP 30 DI 10.1016/0195-6671(92)90026-M PG 28 WC Geology; Paleontology SC Geology; Paleontology GA JD873 UT WOS:A1992JD87300002 ER PT J AU MAZUR, P SCHNEIDER, U MAHOWALD, AP AF MAZUR, P SCHNEIDER, U MAHOWALD, AP TI CHARACTERISTICS AND KINETICS OF SUBZERO CHILLING INJURY IN DROSOPHILA EMBRYOS SO CRYOBIOLOGY LA English DT Article ID MELANOGASTER EMBRYOS; PERMEABILIZATION; ERYTHROCYTES; SURVIVAL; EGGS C1 UNIV CHICAGO,DEPT MOLEC GENET & CELL BIOL,CHICAGO,IL 60637. RP MAZUR, P (reprint author), UNIV TENNESSEE,OAK RIDGE GRAD SCH BIOMED SCI,DIV BIOL,OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 35 TC 64 Z9 65 U1 0 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0011-2240 J9 CRYOBIOLOGY JI Cryobiology PD FEB PY 1992 VL 29 IS 1 BP 39 EP 68 DI 10.1016/0011-2240(92)90005-M PG 30 WC Biology; Physiology SC Life Sciences & Biomedicine - Other Topics; Physiology GA HE286 UT WOS:A1992HE28600005 PM 1606830 ER PT J AU SETLOW, JK ALBRITTON, WL AF SETLOW, JK ALBRITTON, WL TI TRANSFORMATION OF HAEMOPHILUS-INFLUENZAE FOLLOWING ELECTROPORATION WITH PLASMID AND CHROMOSOMAL DNA SO CURRENT MICROBIOLOGY LA English DT Article ID HIGH-VOLTAGE ELECTROPORATION; HEMOPHILUS-INFLUENZAE; DEOXYRIBONUCLEIC-ACID; ESCHERICHIA-COLI; RECOMBINATION; SPECIFICITY; MUTATIONS; SEQUENCE; RSF0885 AB Naturally transformable species, such as Haemophilus influenzae, have evolved systems for the efficient uptake and integration of DNA from the surrounding environment. We compared this competence-dependent DNA uptake system to electroporation, which has been widely used in the past few years to introduce DNA into cells, for transforming Haemophilus influenzae. Electroporation improved transformation efficiency when noncompetent cells were used and when DNA lacking Haemophilus-specific uptake sequences was used for transformation of competent cells. An increase in plasmid-to-chromosome recombination was seen when plasmid DNA containing chromosomal inserts was introduced into competent cells by electroporation, as observed previously for natural transformation. C1 UNIV ALBERTA,PROV LAB PUBL HLTH NO ALBERTA,EDMONTON T6G 2J2,ALBERTA,CANADA. BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. NR 25 TC 2 Z9 2 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0343-8651 J9 CURR MICROBIOL JI Curr. Microbiol. PD FEB PY 1992 VL 24 IS 2 BP 97 EP 100 DI 10.1007/BF01570904 PG 4 WC Microbiology SC Microbiology GA GZ756 UT WOS:A1992GZ75600006 ER PT J AU RASTETTER, EB KING, AW COSBY, BJ HORNBERGER, GM ONEILL, RV HOBBIE, JE AF RASTETTER, EB KING, AW COSBY, BJ HORNBERGER, GM ONEILL, RV HOBBIE, JE TI AGGREGATING FINE-SCALE ECOLOGICAL KNOWLEDGE TO MODEL COARSER-SCALE ATTRIBUTES OF ECOSYSTEMS SO ECOLOGICAL APPLICATIONS LA English DT Article DE AGGREGATION; AGGREGATION ERROR; CALIBRATION; COARSE-SCALE MODELING; ECOLOGICAL MODELING; ERROR PROPAGATION; LUMPED MODELS; MODEL AGGREGATION; SCALE CORRECTIONS; SCALING; SCALING ERROR; TRANSMUTATION ID ERROR; PHOTOSYNTHESIS; DYNAMICS AB As regional and global scales become more important to ecologists, methods must be developed for the application of existing fine-scale knowledge to predict coarser-scale ecosystem properties. This generally involves some form of model in which fine-scale components are aggregated. This aggregation is necessary to avoid the cumulative error associated with the estimation of a large number of parameters. However, aggregation can itself produce errors that arise because of the variation among the aggregated components. The statistical expectation operator can be used as a rigorous method for translating fine-scale relationships to coarser scales without aggregation errors. Unfortunately this method is too cumbersome to be applied in most cases, and alternative methods must be used. These alternative methods are typically partial corrections for the variation in only a few of the fine-scale attributes. Therefore, for these methods to be effective, the attributes that are the most severe sources of error must be identified a priori. We present a procedure for making these identifications based on a Monte Carlo sampling of the fine-scale attributes. We then present four methods of translating fine-scale knowledge so it can be applied at coarser scales: (1) partial transformations using the expectation operator, (2) moment expansions, (3) partitioning, and (4) calibration. These methods should make it possible to apply the vast store of fine-scale ecological knowledge to model coarser-scale attributes of ecosystems. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. DUKE UNIV,SCH FORESTRY & ENVIRONM STUDIES,DURHAM,NC 27706. UNIV VIRGINIA,DEPT ENVIRONM SCI,CHARLOTTESVILLE,VA 22903. RP RASTETTER, EB (reprint author), ECOSYST CTR,MARINE BIOL LAB,WOODS HOLE,MA 02543, USA. RI Cosby, Bernard/B-5653-2012; OI Rastetter, Edward/0000-0002-8620-5431 NR 36 TC 276 Z9 283 U1 2 U2 27 PU ECOLOGICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE, NW, STE 400, WASHINGTON, DC 20036 SN 1051-0761 J9 ECOL APPL JI Ecol. Appl. PD FEB PY 1992 VL 2 IS 1 BP 55 EP 70 DI 10.2307/1941889 PG 16 WC Ecology; Environmental Sciences SC Environmental Sciences & Ecology GA JM283 UT WOS:A1992JM28300006 PM 27759192 ER PT J AU OIKARI, A JIMENEZ, B AF OIKARI, A JIMENEZ, B TI EFFECTS OF HEPATOTOXICANTS ON THE INDUCTION OF MICROSOMAL MONOOXYGENASE ACTIVITY IN SUNFISH LIVER BY BETA-NAPHTHOFLAVONE AND BENZO[A]PYRENE SO ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY LA English DT Article ID CARBON-TETRACHLORIDE; SALMO-GAIRDNERI; RAINBOW-TROUT; MILL EFFLUENT; RAT-LIVER; FISH; 3-METHYLCHOLANTHRENE; BIOTRANSFORMATION; CYTOCHROME-P-450; TOXICITY C1 UNIV JOENSUU,DEPT BIOL,SF-80101 JOENSUU,FINLAND. OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. NR 29 TC 28 Z9 30 U1 0 U2 4 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0147-6513 J9 ECOTOX ENVIRON SAFE JI Ecotox. Environ. Safe. PD FEB PY 1992 VL 23 IS 1 BP 89 EP 102 DI 10.1016/0147-6513(92)90024-W PG 14 WC Environmental Sciences; Toxicology SC Environmental Sciences & Ecology; Toxicology GA HC530 UT WOS:A1992HC53000009 PM 1375151 ER PT J AU DROST, MK ANTONIAK, ZI BROWN, DR SOMASUNDARAM, S AF DROST, MK ANTONIAK, ZI BROWN, DR SOMASUNDARAM, S TI CENTRAL STATION THERMAL-ENERGY STORAGE FOR PEAK AND INTERMEDIATE LOAD POWER-GENERATION SO ENERGY LA English DT Article AB The application of thermal energy storage to central station power plants allows baseload power-generating technologies to provide peak and intermediate load electric power. DOE has provided funding for a study to investigate the technical and economic feasibility of using molten nitrate salt thermal energy storage in conjunction with pulverized-fired and integrated gasification combined-cycle power plants. The results suggest that the use of thermal energy storage is technically feasible and can reduce the cost of generating peak and intermediate load electric power from coal by between 5% and 20%. RP DROST, MK (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. NR 29 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-5442 J9 ENERGY JI Energy PD FEB PY 1992 VL 17 IS 2 BP 127 EP 139 DI 10.1016/0360-5442(92)90062-5 PG 13 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA HB437 UT WOS:A1992HB43700003 ER PT J AU AKBARI, H TAHA, H AF AKBARI, H TAHA, H TI THE IMPACT OF TREES AND WHITE SURFACES ON RESIDENTIAL HEATING AND COOLING ENERGY USE IN 4 CANADIAN CITIES SO ENERGY LA English DT Article AB We have investigated the potential of using vegetation and high-albedo materials in Toronto, Edmonton, Montreal, and Vancouver, Canada, to modify the urban microclimate, thereby saving residential heating and cooling energy use. Parametric computer simulations of microclimates and energy performance of prototypical houses were our primary analysis tools. The building prototypes included a detached one-story and a detached two-story single family house, as well as a row house. The simulations indicated that by increasing the vegetative cover of the neighborhood by 30% (corresponding to about three trees per house) and increasing the albedo of the houses by 20% (from moderate-dark to medium-light color), the heating energy in Toronto can be reduced by about 10% in urban houses and 20% in rural houses, whereas cooling energy can be reduced by 40 and 30%, respectively. The annual savings in heating and cooling costs for different houses ranged from $30 to $180 in urban areas and from $60 to $400 in rural zones. In urban houses of Edmonton, Montreal, and Vancouver, savings in heating energy use were about 10%. Cooling energy can be totally offset in Edmonton and Vancouver, and average savings of 35% can be achieved in Montreal. RP AKBARI, H (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV APPL SCI,HEAT ISL PROJECT,BERKELEY,CA 94720, USA. RI Quezada, George/I-1106-2012 OI Quezada, George/0000-0002-4060-6109 NR 8 TC 59 Z9 65 U1 1 U2 17 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-5442 J9 ENERGY JI Energy PD FEB PY 1992 VL 17 IS 2 BP 141 EP 149 DI 10.1016/0360-5442(92)90063-6 PG 9 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA HB437 UT WOS:A1992HB43700004 ER PT J AU HILL, LJ HIRST, E SCHWEITZER, M AF HILL, LJ HIRST, E SCHWEITZER, M TI FROM DSM TECHNOLOGIES TO DSM PROGRAMS - ISSUES IN DEMAND-SIDE PLANNING FOR ELECTRIC UTILITIES SO ENERGY LA English DT Article AB We argue that it is more appropriate to compare demand-side management (DSM) programs, rather than DSM technologies, with supply resources in electric utility integrated planning. To accomplish this, DSM technologies must be identified and screened for appropriateness in a given service territory. Then, the technologies must be converted into DSM programs and screened again for cost-effectiveness. The discussion of important features of this process in this paper is illustrated by the experiences of U.S. electric utilities. We conclude that not enough is known about (1) mechanisms for effectively converting DSM technologies into DSM programs and (2) the trade-offs between DSM program costs incurred by utilities and customer-participation rates. RP HILL, LJ (reprint author), OAK RIDGE NATL LAB,DIV ENERGY,POB 2008,BLDG 4500-N,OAK RIDGE,TN 37831, USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-5442 J9 ENERGY JI Energy PD FEB PY 1992 VL 17 IS 2 BP 151 EP 160 DI 10.1016/0360-5442(92)90064-7 PG 10 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA HB437 UT WOS:A1992HB43700005 ER PT J AU SATHAYE, J GADGIL, A AF SATHAYE, J GADGIL, A TI AGGRESSIVE COST-EFFECTIVE ELECTRICITY CONSERVATION - NOVEL APPROACHES SO ENERGY POLICY LA English DT Article DE ELECTRICITY CONSERVATION; ECONOMIC DEVELOPMENT; DEVELOPING COUNTRIES AB Scarce capital constrains the installation of new generating capacity in most developing countries. Pursuing electricity conservation through cost-effective end-use efficiency improvements offers an important way to reduce the demand for new capital. However, an array of barriers to improving efficiency prevents its implementation. Barriers may be overcome by the adoption of programmes which are succeeding in industrialized countries. These countries and multilateral donor institutions can help increase enduse efficiency in the developing world through loans and grants for utility companies and manufacturers. This paper suggests ways to increase the electricity efficiency of new and existing electricity end-uses in the developing countries. It draws a parallel to an idea from the environmental community and proposes requiring each new plant in selected industrial sectors to prepare an energy-efficiency impact statement. RP SATHAYE, J (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. OI Gadgil, Ashok/0000-0002-0357-9455 NR 24 TC 7 Z9 7 U1 0 U2 1 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0301-4215 J9 ENERG POLICY JI Energy Policy PD FEB PY 1992 VL 20 IS 2 BP 163 EP 172 DI 10.1016/0301-4215(92)90110-N PG 10 WC Energy & Fuels; Environmental Sciences; Environmental Studies SC Energy & Fuels; Environmental Sciences & Ecology GA HE567 UT WOS:A1992HE56700009 ER PT J AU HYLTON, TD AF HYLTON, TD TI EVALUATION OF THE TCE CATALYTIC-OXIDATION UNIT AT WURTSMITH AIR-FORCE BASE SO ENVIRONMENTAL PROGRESS LA English DT Article AB Wurtsmith Air Force Base is the site of an air-stripping-with-emissions-control system to remove volatile organic compounds (VOCs), chiefly trichloroethylene (TCE), from groundwater. The purpose of this study was to evaluate the performance of a fluidized-bed catalytic oxidation unit for destroying halogenated organics with respect to catalyst bed temperature and operating time. The objectives included identification of any products of incomplete combustion formed and determination of the utility costs for the unit. Samples were collected over a period of approximately 19 months with volatile organic sampling trains according to the Environmental Protection Agency (EPA) Method 30. Samples were taken at catalyst bed temperatures of 315, 370, 425, and 480-degrees-C. The results indicate that the incinerator was destroying the TCE with > 97% efficiency when operated at greater-than-or-equal-to 370-degrees-C. A conservative cost estimate for utilities was determined to be $0.36/1000 gal of water treated. RP HYLTON, TD (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,ENGN DEV SECT,OAK RIDGE,TN 37831, USA. NR 0 TC 11 Z9 11 U1 0 U2 1 PU AMER INST CHEMICAL ENGINEERS PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0278-4491 J9 ENVIRON PROG JI Environ. Prog. PD FEB PY 1992 VL 11 IS 1 BP 54 EP 57 DI 10.1002/ep.670110118 PG 4 WC Engineering, Environmental; Engineering, Chemical; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA HH939 UT WOS:A1992HH93900011 ER PT J AU CHANG, SG LEE, GC AF CHANG, SG LEE, GC TI LBL PHOSNOX PROCESS FOR COMBINED REMOVAL OF SO2 AND NOX FROM FLUE-GAS SO ENVIRONMENTAL PROGRESS LA English DT Article AB The addition of yellow phosphorus in wet scrubbing systems can result in the high efficiency simultaneous removal of SO2 and NO(x) from flue gas. Yellow phosphorus reacts with O2 to produce O3 which selectively oxidizes NO to NO2. Subsequently, NO2 and SO2 are removed from flue gas by dissolution into an aqueous alkaline solution/slurry, where they are converted to ammonium sulfate and gypsum. Yellow phosphorus is oxidized to yield a desirable commercial by-product, phosphoric acid. This new technology has been tested jointly by LBL and Bechtel at LBL with a 20 cfm [9.44 x 10(-3) m3/sec] bench-scale scrubbing absorber. The test results indicated that greater than 90% NO removal efficiency could be achieved with an L/G > 60 (gal/min)/(1000 cu ft/min) [1 liter/m3 = 7.48 gal/1000 cu ft] for NO concentrations ranging from 60 to 600 ppm. A stoichiometric ratio, P/NO, as low as 0.6 has been achieved. Economic projections for the PhoSNOX process have been made based on a conceptual process configuration. The estimated costs compare favorably with the SCR for high removal and are competitive with urea injection processes for low levels of NO(x) removal. FMC has conducted a safety study of the process and concluded that the potential safety hazards of yellow phosphorus can be avoided if proper precautions are taken. RP CHANG, SG (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV APPL SCI,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 0 TC 22 Z9 33 U1 1 U2 10 PU AMER INST CHEMICAL ENGINEERS PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0278-4491 J9 ENVIRON PROG JI Environ. Prog. PD FEB PY 1992 VL 11 IS 1 BP 66 EP 73 DI 10.1002/ep.670110120 PG 8 WC Engineering, Environmental; Engineering, Chemical; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA HH939 UT WOS:A1992HH93900013 ER PT J AU TRAVIS, CC BLAYLOCK, BP AF TRAVIS, CC BLAYLOCK, BP TI SETTING PRIORITIES FOR ENVIRONMENTAL-POLICY SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Editorial Material RP TRAVIS, CC (reprint author), OAK RIDGE NATL LAB,CTR RISK MANAGEMENT,OAK RIDGE,TN, USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD FEB PY 1992 VL 26 IS 2 BP 215 EP 215 DI 10.1021/es00026a604 PG 1 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA HB871 UT WOS:A1992HB87100001 ER PT J AU BARNTHOUSE, LW AF BARNTHOUSE, LW TI CASE-STUDIES IN ECOLOGICAL RISK ASSESSMENT SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article C1 OAK RIDGE NATL LAB,CTR RISK MANAGEMENT,OAK RIDGE,TN. RP BARNTHOUSE, LW (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,ENVIRONM RISK GRP,OAK RIDGE,TN, USA. NR 2 TC 3 Z9 4 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD FEB PY 1992 VL 26 IS 2 BP 230 EP 231 DI 10.1021/es00026a608 PG 2 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA HB871 UT WOS:A1992HB87100005 ER PT J AU DUNNIVANT, FM JARDINE, PM TAYLOR, DL MCCARTHY, JF AF DUNNIVANT, FM JARDINE, PM TAYLOR, DL MCCARTHY, JF TI COTRANSPORT OF CADMIUM AND HEXACHLOROBIPHENYL BY DISSOLVED ORGANIC-CARBON THROUGH COLUMNS CONTAINING AQUIFER MATERIAL SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID WATER PARTITION-COEFFICIENTS; AQUATIC SYSTEMS; HUMIC MATERIALS; TRANSPORT; SOIL; ADSORPTION; POLLUTANTS; COLLOIDS; MATTER; ACIDS AB The cotransport of an ionic contaminant (cadmium) and two nonionic contaminants (2,2',4,4',5,5'-hexachlorobiphenyl and 2,2'4,4',6,6'-hexachlorobiphenyl) by naturally occurring dissolved organic carbon (DOC) was evaluated using columns containing aquifer material. Contaminant mobility was found to increase as solution DOC concentrations were incrementally changed from 0 to 20.4 mg of DOC/L for polychlorinated biphenyl (PCB) and from 0 to 58.1 mg of DOC/L for cadmium. Desorption processes were similarly affected by the presence of mobile DOC. Experimental adsorption breakthrough curves (BTCs) were predicted independently of column experiments using measured contaminant distribution coefficients (batch technique) and the convection-dispersion (CD) transport equation. The increased contaminant mobility, observed in the presence of mobile DOC, was explained by incorporating a three-phase system (two mobile, one stationary) into the CD transport equation. Results support the hypothesis that contaminants can be cotransported by mobile DOC in groundwater systems. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37831. NR 34 TC 107 Z9 115 U1 0 U2 14 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD FEB PY 1992 VL 26 IS 2 BP 360 EP 368 DI 10.1021/es00026a018 PG 9 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA HB871 UT WOS:A1992HB87100025 ER PT J AU COMBES, JM CHISHOLMBRAUSE, CJ BROWN, GE PARKS, GA CONRADSON, SD ELLER, PG TRIAY, IR HOBART, DE MEIJER, A AF COMBES, JM CHISHOLMBRAUSE, CJ BROWN, GE PARKS, GA CONRADSON, SD ELLER, PG TRIAY, IR HOBART, DE MEIJER, A TI EXAFS SPECTROSCOPIC STUDY OF NEPTUNIUM(V) SORPTION AT THE ALPHA-FEOOH WATER INTERFACE SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID X-RAY-ABSORPTION; ADSORPTION; COMPLEXES; ION; OXIDES AB The sorption of aqueous Np(V) on crystalline alpha-FeOOH (goethite) has been studied at the molecular level by synchrotron-based X-ray absorption spectroscopy. Sodium nitrate solutions (pH 7.2, ionic strength 0.08 M) having a Np(V) concentration of 1.3 x 10(-5) M were reacted with high surface area goethite (50 m2/g), resulting in approximately 95% uptake of the Np and a sorption density of 10(-5) mol of Np/g of goethite. Np L(III)-edge X-ray absorption spectra were collected in the fluorescence-yield mode on wet pastes after removal of approximately 90% of the solution phase by centrifuging. Comparison of spectra from the sorption sample with Np L(III) spectra from crystalline NpO2, a 1.3 mM Np(V) solution, and U(VI) L(III) spectra from crystalline uranyl nitrate and triacetate and U(VI) sorbed onto ferric hydroxide gel shows that Np(V) sorbs as isolated neptunyl (NpO2+) groups and is not multinuclear under the conditions of our experiment. Least-squares modeling of the EXAFS spectrum of the Np/goethite sorption sample shows two oxygen shells around Np consisting of two oxygens at 1.85 +/- 0.02 angstrom and about five oxygens at 2.51 +/- 0.03 angstrom, consistent with a distorted pentagonal-bipyramid complex. The only significant difference between Fourier transforms of the EXAFS spectra of the Np/goethite sorption sample and the Np solution sample is a weak feature at approximately 3 angstrom in the former. We have tentatively identified this feature as a Np-Fe second-neighbor pair correlation, which suggests that Np(V) sorbs at the goethite/water interface under these solution conditions as an inner-sphere complex. Our results rule out sorption as a simple, ordered neptunium oxide or hydroxide or as a coprecipitate with an iron oxide-hydroxide phase. C1 STANFORD UNIV, SCH EARTH SCI, AQUEOUS & SURFACE GEOCHEM GRP, STANFORD, CA 94305 USA. UNIV CALIF LOS ALAMOS SCI LAB, DIV ISOTOPE & NUCL CHEM, LOS ALAMOS, NM 87545 USA. NR 40 TC 105 Z9 110 U1 6 U2 33 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X EI 1520-5851 J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD FEB PY 1992 VL 26 IS 2 BP 376 EP 382 DI 10.1021/es00026a020 PG 7 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA HB871 UT WOS:A1992HB87100027 ER PT J AU UE, K MUHLRAD, A EDMONDS, CG BIVIN, D CLARK, A PIECHOWSKI, WV MORALES, MF AF UE, K MUHLRAD, A EDMONDS, CG BIVIN, D CLARK, A PIECHOWSKI, WV MORALES, MF TI THE SEQUENCE LOCATION OF THE ACTIN METAL SO EUROPEAN JOURNAL OF BIOCHEMISTRY LA English DT Article ID ELECTROSPRAY IONIZATION; NONENZYMATIC CLEAVAGE; MASS-SPECTROMETRY; DNASE-I; MYOSIN; PROTEINS; COMPLEX; ELECTROPHORESIS; DITHIOTHREITOL; INTERFACE AB We have incorporated Fe2+ into the high-affinity metal-ion-binding site of actin. By supplying the system with oxygen from air and a reductant (dithiothreitol or ascorbate), we have induced free-radical generation, with the intent of causing peptide cleavage at the metal-ion-binding site, By analysis of the resulting fragments from actin in the F-form, we have deduced that cuts occurred at positions 159-160 and 301-302 (at the latter location we could not be sure if more than one cut occurred). We considered that these two cuts occurred in the chain strand coursing from the outer to the inner domain and vice-versa. Our results harmonize very well with the recently reported atomic structure of actin [Kabsch, W., Mannherz, H. G., Suck, D., Pai, E. F. & Holmes, K. C. (1990) Nature 347, 37-441 and remove ambiguities that had remained in the structure. The results partly bear out the homology-based prediction of Strzelecka-Golaszewska et al. [Strzelecka-Golaszewska, H., Boguta, G., Zmorzynshi, S. & Moraczcwska, J. (1989) Eur. J. Biochem. 182, 299-305]. C1 HEBREW UNIV JERUSALEM, HADASSAH SCH DENT MED, JERUSALEM, ISRAEL. PACIFIC NW LAB, RICHLAND, WA 99352 USA. RP UE, K (reprint author), UNIV PACIFIC, DEPT PHYSIOL & BIOPHYS, 2155 WEBSTER ST, SAN FRANCISCO, CA 94115 USA. FU NHGRI NIH HHS [HG00327] NR 29 TC 7 Z9 7 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0014-2956 J9 EUR J BIOCHEM JI Eur. J. Biochem. PD FEB 1 PY 1992 VL 203 IS 3 BP 493 EP 498 DI 10.1111/j.1432-1033.1992.tb16574.x PG 6 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA HC537 UT WOS:A1992HC53700021 PM 1531193 ER PT J AU HIRST, E AF HIRST, E TI THE ROLE OF EVALUATION WHEN ELECTRIC UTILITIES GET FINANCIAL INCENTIVES FOR THEIR DSM PROGRAMS SO EVALUATION REVIEW LA English DT Article AB Electric utility demand-side management (DSM) programs affect the efficiency and timing of customer electricity use. As the number and cost of these programs increase, evaluations will become increasingly important. A key challenge is the role of evaluation in determining the amount of financial incentive that a utility earns for its DSM programs. Most regulatory incentives for DSM programs depend on the net benefits provided by these programs. The total benefit is the reductions in electricity use and demand multiplied by the appropriate avoided costs (energy or capacity). The net benefit is the difference between total benefit and program cost. Evaluations determine the total benefits of DSM programs. This article presents a hypothetical example of problems that might arise when evaluations are subject to litigation, a likely occurrence when utility earnings depend on evaluation results. A hypothetical illustration is used because such incentives are so new that they have yet to be tested in regulatory proceedings. Possible resolutions to the problems raised by the hypothetical example are discussed. RP HIRST, E (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37830, USA. NR 19 TC 1 Z9 1 U1 0 U2 0 PU SAGE PUBLICATIONS INC PI THOUSAND OAKS PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 SN 0193-841X J9 EVALUATION REV JI Eval. Rev. PD FEB PY 1992 VL 16 IS 1 BP 93 EP 107 DI 10.1177/0193841X9201600107 PG 15 WC Social Sciences, Interdisciplinary SC Social Sciences - Other Topics GA GZ084 UT WOS:A1992GZ08400007 ER PT J AU STEVENS, RG DAVIS, S THOMAS, DB ANDERSON, LE WILSON, BW AF STEVENS, RG DAVIS, S THOMAS, DB ANDERSON, LE WILSON, BW TI ELECTRIC-POWER, PINEAL FUNCTION, AND THE RISK OF BREAST-CANCER SO FASEB JOURNAL LA English DT Article DE BREAST CANCER; ELECTRIC POWER; PINEAL GLAND; MELATONIN ID NUTRITION EXAMINATION SURVEY; MELATONIN SECRETION; FIELD EXPOSURE; DIETARY-FAT; VARYING PHOTOPERIODS; ALCOHOL-CONSUMPTION; RISING INCIDENCE; TEMPORAL TRENDS; NATIONAL-HEALTH; MAGNETIC-FIELD AB Breast cancer is the leading cause of cancer death in women in the industrialized world, and the rates of breast cancer incidence are rising. Although risk is high in industrialized societies, it is low in nonindustrialized areas. The search for the causes of breast cancer has not yet yielded a convincing explanation for the geographic and temporal patterns in the occurrence of breast cancer. Generation of electric power is a hallmark of industrialization, and two products of electric power, light-at-night (LAN) and electromagnetic fields (EMF), may affect breast cancer risk. Exposure to either LAN or EMF can decrease production of melatonin by the pineal gland. Melatonin, in turn, has been shown to suppress mammary tumorigenesis in experimental animals. Moreover, recent epidemiological findings indicate an increased risk of breast cancer in workers occupationally exposed to EMF. On the basis of these considerations, it is proposed that the use of electrical power accounts, in part, for the higher risks of breast cancer in industrialized societies. C1 FRED HUTCHINSON CANC RES CTR, SEATTLE, WA 98104 USA. RP STEVENS, RG (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 106 TC 143 Z9 147 U1 0 U2 6 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD FEB 1 PY 1992 VL 6 IS 3 BP 853 EP 860 PG 8 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA HE390 UT WOS:A1992HE39000008 PM 1740235 ER PT J AU MACGREGOR, MH AF MACGREGOR, MH TI KEV CHANNELING EFFECTS IN THE MOTT SCATTERING OF ELECTRONS AND POSITRONS SO FOUNDATIONS OF PHYSICS LETTERS LA English DT Article DE ANOMALOUS MOTT SCATTERING; ELECTRON MODELS; KEV MOTT CHANNELING AB High-energy scattering experiments mandate a point-like charge on the electron. However, the spectroscopic properties of the electron suggest an overall Compton-sized geometry. Adopting the model of a Compton-sized electron or positron that has a equatorial point charge, we use detailed computer calculations of classical Coulomb scattering off atomic nuclei to delineate the boundaries of a narrow energy window, in the KeV range, in which finite-size effects should be observable. Some experimental evidence for these finite-size effects can be found in the published literature. RP MACGREGOR, MH (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT PHYS,LIVERMORE,CA 94550, USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0894-9875 J9 FOUND PHYS LETT JI Found. Phys. Lett. PD FEB PY 1992 VL 5 IS 1 BP 15 EP 23 PG 9 WC Physics, Multidisciplinary SC Physics GA HL180 UT WOS:A1992HL18000002 ER PT J AU RAO, VUS STIEGEL, GJ CINQUEGRANE, GJ SRIVASTAVA, RD AF RAO, VUS STIEGEL, GJ CINQUEGRANE, GJ SRIVASTAVA, RD TI IRON-BASED CATALYSTS FOR SLURRY-PHASE FISCHER-TROPSCH PROCESS - TECHNOLOGY REVIEW SO FUEL PROCESSING TECHNOLOGY LA English DT Review ID CHAIN GROWTH PROBABILITIES; WATER-GAS SHIFT; PRODUCT DISTRIBUTIONS; REACTOR; KINETICS; CARBON; HYDROCARBONS; ACTIVATION; MECHANISM; OXIDES AB The slurry-phase reactor system is of interest in Fischer-Tropsch synthesis owing to the ability of the reactor system to efficiently remove the heat produced by the exothermic reaction. Iron-based catalysts are active for Fischer-Tropsch synthesis and for the water-gas shift reaction, and, in addition, are inexpensive. Hence, they have been examined in slurry-phase Fischer-Tropsch synthesis with CO-rich synthesis gas. The role of promoters, carbide phases, and oxide phases in iron-based catalysts is not well understood. The article reviews current knowledge of iron-based catalysts with reference to their application in slurry-phase Fischer-Tropsch synthesis. Areas of investigation requiring further research are identified. C1 BURNS & ROE SERV CORP,POB 18288,PITTSBURGH,PA 15236. US DOE,PITTSBURGH ENERGY TECHNOL CTR,PITTSBURGH,PA 15236. NR 69 TC 49 Z9 51 U1 4 U2 30 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3820 J9 FUEL PROCESS TECHNOL JI Fuel Process. Technol. PD FEB PY 1992 VL 30 IS 1 BP 83 EP 107 DI 10.1016/0378-3820(92)90077-4 PG 25 WC Chemistry, Applied; Energy & Fuels; Engineering, Chemical SC Chemistry; Energy & Fuels; Engineering GA HH973 UT WOS:A1992HH97300006 ER PT J AU GUTIERREZESPELETA, GA HUGHES, LA PIEGORSCH, WW SHELBY, MD GENEROSO, WM AF GUTIERREZESPELETA, GA HUGHES, LA PIEGORSCH, WW SHELBY, MD GENEROSO, WM TI ACRYLAMIDE - DERMAL EXPOSURE PRODUCES GENETIC-DAMAGE IN MALE-MOUSE GERM-CELLS SO FUNDAMENTAL AND APPLIED TOXICOLOGY LA English DT Article ID MALE-MICE; JACKKNIFE C1 OAK RIDGE NATL LAB,DIV BIOL,POB 2009,OAK RIDGE,TN 37738. NIEHS,RES TRIANGLE PK,NC 27709. UNIV COSTA RICA,ESCUELA BIOL,SAN JOSE,COSTA RICA. OI Piegorsch, Walter/0000-0003-2725-5604 FU NIEHS NIH HHS [Y01-ES-20085] NR 14 TC 25 Z9 25 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0272-0590 J9 FUND APPL TOXICOL JI Fundam. Appl. Toxicol. PD FEB PY 1992 VL 18 IS 2 BP 189 EP 192 DI 10.1016/0272-0590(92)90045-J PG 4 WC Toxicology SC Toxicology GA HD260 UT WOS:A1992HD26000004 PM 1601219 ER PT J AU CLARK, CR FERGUSON, PW KATCHEN, MA CRAIG, DK AF CLARK, CR FERGUSON, PW KATCHEN, MA CRAIG, DK TI 2-GENERATION REPRODUCTION STUDY OF HYDROTREATED SHALE OIL VAPORS SO FUNDAMENTAL AND APPLIED TOXICOLOGY LA English DT Article ID SPERM; TOXICITY; INVITRO; MICE C1 NE LOUISIANA UNIV,MONROE,LA 71201. ENVIRON CORP,IRVINE,CA 92714. SAVANNAH RIVER LABS,AIKEN,SC 29802. RP CLARK, CR (reprint author), UNOCAL CORP,LOS ANGELES,CA 90051, USA. NR 20 TC 1 Z9 1 U1 1 U2 3 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0272-0590 J9 FUND APPL TOXICOL JI Fundam. Appl. Toxicol. PD FEB PY 1992 VL 18 IS 2 BP 227 EP 232 DI 10.1016/0272-0590(92)90050-R PG 6 WC Toxicology SC Toxicology GA HD260 UT WOS:A1992HD26000009 PM 1601222 ER PT J AU MAST, TJ WEIGEL, RJ WESTERBERG, RB SCHWETZ, BA MORRISSEY, RE AF MAST, TJ WEIGEL, RJ WESTERBERG, RB SCHWETZ, BA MORRISSEY, RE TI EVALUATION OF THE POTENTIAL FOR DEVELOPMENTAL TOXICITY IN RATS AND MICE FOLLOWING INHALATION EXPOSURE TO TETRAHYDROFURAN SO FUNDAMENTAL AND APPLIED TOXICOLOGY LA English DT Article ID ORGANIC-SOLVENTS C1 NIEHS, DIV TOXICOL RES & TESTING, DEV & REPROD TOXICOL GRP, RES TRIANGLE PK, NC 27709 USA. RP MAST, TJ (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. FU NIEHS NIH HHS [Y01-ES-70153] NR 27 TC 3 Z9 3 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0272-0590 J9 FUND APPL TOXICOL JI Fundam. Appl. Toxicol. PD FEB PY 1992 VL 18 IS 2 BP 255 EP 265 DI 10.1016/0272-0590(92)90054-L PG 11 WC Toxicology SC Toxicology GA HD260 UT WOS:A1992HD26000013 PM 1601226 ER PT J AU SMITH, CL AF SMITH, CL TI ELECTROPHORESIS ANALYSIS SO GENETIC ANALYSIS-BIOMOLECULAR ENGINEERING LA English DT Editorial Material RP SMITH, CL (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 0 TC 9 Z9 9 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1050-3862 J9 GENET ANAL-BIOMOL E JI Genet. Anal.-Biomol. Eng. PD FEB PY 1992 VL 9 IS 1 BP 1 EP 1 DI 10.1016/1050-3862(92)90022-W PG 1 WC Biochemical Research Methods; Biotechnology & Applied Microbiology; Genetics & Heredity SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity GA HX658 UT WOS:A1992HX65800001 ER PT J AU CHANG, KS VYAS, RC DEAVEN, LL TRUJILLO, JM STASS, SA HITTELMAN, WN AF CHANG, KS VYAS, RC DEAVEN, LL TRUJILLO, JM STASS, SA HITTELMAN, WN TI PCR AMPLIFICATION OF CHROMOSOME-SPECIFIC DNA ISOLATED FROM FLOW CYTOMETRY-SORTED CHROMOSOMES SO GENOMICS LA English DT Article ID FLUORESCENCE INSITU HYBRIDIZATION; POLYMERASE CHAIN-REACTION; CANCER CELL-LINE; LIBRARIES; GENE; LOCALIZATION; SEQUENCE; ESTROGEN; MCF-7 C1 UNIV TEXAS,MD ANDERSON HOSP & TUMOR INST,DEPT MED ONCOL,HOUSTON,TX 77030. UNIV CALIF LOS ALAMOS SCI LAB,DIV LIFE SCI,CELL BIOL GRP,LOS ALAMOS,NM 87545. RP CHANG, KS (reprint author), UNIV TEXAS,MD ANDERSON HOSP & TUMOR INST,DEPT LAB MED,1515 HOLCOMBE BLVD,BOX 72,HOUSTON,TX 77030, USA. FU NCI NIH HHS [CA27931, CA48364] NR 20 TC 11 Z9 11 U1 1 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0888-7543 J9 GENOMICS JI Genomics PD FEB PY 1992 VL 12 IS 2 BP 307 EP 312 DI 10.1016/0888-7543(92)90378-6 PG 6 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA GY879 UT WOS:A1992GY87900015 PM 1740340 ER PT J AU COBB, RR RINCHIK, E BARNETT, LB BURKHART, JG LEWIS, SE AF COBB, RR RINCHIK, E BARNETT, LB BURKHART, JG LEWIS, SE TI A MALIC ENZYME PROBE DETECTS CROSS-HYBRIDIZING SEQUENCES CLOSELY LINKED TO LOCI ENCODING OTHER METABOLIC ENZYMES SO GENOMICS LA English DT Note ID MOUSE; ELECTROPHORESIS; IDENTIFICATION; INDUCTION; MUTANTS; MICE C1 OAK RIDGE NATL LAB,DEPT BIOL,OAK RIDGE,TN 37830. NIEHS,DEPT GENET TOXICOL,RES TRIANGLE PK,NC 27709. RP COBB, RR (reprint author), RES TRIANGLE INST,CHEM & LIFE SCI GRP,POB 12194,RES TRIANGLE PK,NC 27709, USA. NR 13 TC 3 Z9 3 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0888-7543 J9 GENOMICS JI Genomics PD FEB PY 1992 VL 12 IS 2 BP 405 EP 408 DI 10.1016/0888-7543(92)90393-7 PG 4 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA GY879 UT WOS:A1992GY87900030 PM 1346782 ER PT J AU CANTOR, CR FIELDS, CA AF CANTOR, CR FIELDS, CA TI GENOME SEQUENCING CONFERENCE .3. EVOLUTION AND PROGRESS SO GENOMICS LA English DT Editorial Material C1 NIH,BETHESDA,MD 20892. RP CANTOR, CR (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0888-7543 J9 GENOMICS JI Genomics PD FEB PY 1992 VL 12 IS 2 BP 419 EP 420 DI 10.1016/0888-7543(92)90397-B PG 2 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA GY879 UT WOS:A1992GY87900034 PM 1346783 ER PT J AU VALENTINE, GA WOHLETZ, KH KIEFFER, SW AF VALENTINE, GA WOHLETZ, KH KIEFFER, SW TI EFFECTS OF TOPOGRAPHY ON FACIES AND COMPOSITIONAL ZONATION IN CALDERA-RELATED IGNIMBRITES SO GEOLOGICAL SOCIETY OF AMERICA BULLETIN LA English DT Article ID PYROCLASTIC FLOWS; MAGMA CHAMBERS; NUMERICAL-MODELS; ERUPTION COLUMNS; JEMEZ MOUNTAINS; NEW-MEXICO; ASH; GENERATION; COLLAPSE; DYNAMICS AB Large-scale fluid dynamical processes during explosive eruptions within calderas are examined numerically by solving the full set of two-phase hydrodynamic equations with a topographic barrier, representing the rim of a caldera. The effect of the caldera rim on eruption dynamics depends on the relative locations of the rim and the impact zone where tephra collapsing from the eruption column strikes the ground. The distance of the impact zone from the vent is proportional to the collapse (fountain) height of the eruption column. Three significantly different eruption patterns have been observed in the simulations: (1) If the impact zone is outside the caldera rim, relatively continuous pyroclastic flow occurs outside the caldera. (2) If the impact zone is on or near the caldera rim, an initial pyroclastic current flows out of the caldera and is followed by a lapse in outflow during which the caldera fills up with ash. (3) If the impact zone is inside the rim, all initial pyroclastic flows are contained within the caldera unless the flows have sufficiently high initial densities and velocities to carry them over the rim. In most cases, recirculation of pyroclasts into the base of the column causes fountain height to decrease dramatically with time due to the "choking" effect of the ash. This recycling of ash in turn reduces the ability of pyroclastic flows to surmount the rim. The numerical models suggest several processes that cause the formation of multiple cooling and flow units in deposits outside a caldera from a single eruption of steady discharge. Compositional gaps may occur in outflow ignimbrite due entirely to interaction of eruption and emplacement dynamics with topography; sharp compositional gradients within a magma chamber are not necessarily implied by compositional gaps in outflow units. Outflow and intraceldera facies tuffs from the same eruptions can show different cooling histories and compositional variations because of these large-scale fluid dynamical processes. C1 UNIV CALIF LOS ALAMOS SCI LAB,GEOL GEOCHEM GRP,LOS ALAMOS,NM 87545. ARIZONA STATE UNIV,DEPT GEOL,TEMPE,AZ 85287. RP VALENTINE, GA (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,GEOANAL GRP,MS F665,LOS ALAMOS,NM 87545, USA. NR 34 TC 44 Z9 44 U1 2 U2 7 PU GEOLOGICAL SOC AMERICA PI BOULDER PA PO BOX 9140 3300 PENROSE PLACE, BOULDER, CO 80301 SN 0016-7606 J9 GEOL SOC AM BULL JI Geol. Soc. Am. Bull. PD FEB PY 1992 VL 104 IS 2 BP 154 EP 165 DI 10.1130/0016-7606(1992)104<0154:EOTOFA>2.3.CO;2 PG 12 WC Geosciences, Multidisciplinary SC Geology GA HC055 UT WOS:A1992HC05500003 ER PT J AU SMIT, J MONTANARI, A SWINBURNE, NHM ALVAREZ, W HILDEBRAND, AR MARGOLIS, SV CLAEYS, P LOWRIE, W ASARO, F AF SMIT, J MONTANARI, A SWINBURNE, NHM ALVAREZ, W HILDEBRAND, AR MARGOLIS, SV CLAEYS, P LOWRIE, W ASARO, F TI TEKTITE-BEARING, DEEP-WATER CLASTIC UNIT AT THE CRETACEOUS-TERTIARY BOUNDARY IN NORTHEASTERN MEXICO SO GEOLOGY LA English DT Article ID TEXAS AB The hypothesis of Cretaceous-Tertiary (K-T) boundary impact on Yucatan, Mexico, predicts that nearby sites should show evidence of proximal impact ejecta and disturbance by giant waves. An outcrop along the Arroyo el Mimbral in northeastern Mexico contains a layered clastic unit up to 3 m thick that interrupts a biostratigraphically complete pelagic-marl sequence deposited at more than 400 m water depth. The marls were found to be unsuitable for determining magnetostratigraphy, but foraminiferal biostratigraphy places the clastic unit precisely at the K-T boundary. We interpret this clastic unit as the deposit of a megawave or tsunami produced by an extraterrestrial impact. The clastic unit comprises three main subunits. (1) The basal "spherule bed" contains glass in the form of tektites and microtektites, glass spherules replaced by chlorite-smectite and calcite, and quartz grains showing probable shock features. This bed is interpreted as a channelized deposit of proximal ejecta. (2) A set of lenticular, massive, graded "laminated beds" contains intraclasts and abundant plant debris, and may be the result of megawave backwash that carried coarse debris from shallow parts of the continental margin into deeper water. (3) At the top, several thin "ripple beds" composed of fine sand are separated by clay drapes; they are interpreted as deposits of oscillating currents, perhaps a seiche. An iridium anomaly (921 +/- 23 pg/g) is observed at the top of the ripple beds. Our observations at the Mimbral locality support the hypothesis of a K-T impact on nearby Yucatan. C1 UNIV CALIF BERKELEY,DEPT GEOL & GEOPHYS,BERKELEY,CA 94720. UNIV ARIZONA,DEPT PLANETARY SCI,TUCSON,AZ 85721. UNIV CALIF DAVIS,DEPT GEOL,DAVIS,CA 95616. SWISS FED INST TECHNOL,INST GEOPHYS,CH-8093 ZURICH,SWITZERLAND. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP SMIT, J (reprint author), FREE UNIV AMSTERDAM,DEPT SEDIMENTARY GEOL,POB 7161,1007 MC AMSTERDAM,NETHERLANDS. RI Claeys, Philippe/B-4895-2008 OI Claeys, Philippe/0000-0002-4585-7687 NR 38 TC 203 Z9 207 U1 1 U2 15 PU GEOLOGICAL SOC AMERICA PI BOULDER PA PO BOX 9140 3300 PENROSE PLACE, BOULDER, CO 80301 SN 0091-7613 J9 GEOLOGY JI Geology PD FEB PY 1992 VL 20 IS 2 BP 99 EP 103 DI 10.1130/0091-7613(1992)020<0099:TBDWCU>2.3.CO;2 PG 5 WC Geology SC Geology GA HC054 UT WOS:A1992HC05400001 PM 11537752 ER PT J AU DALEY, EE DEPAOLO, DJ AF DALEY, EE DEPAOLO, DJ TI ISOTOPIC EVIDENCE FOR LITHOSPHERIC THINNING DURING EXTENSION - SOUTHEASTERN GREAT-BASIN SO GEOLOGY LA English DT Article ID RIO-GRANDE RIFT; TERTIARY ROCKS; UNITED-STATES; NEVADA; EVOLUTION; GENESIS; MARGIN; ORIGIN AB Mafic rocks erupted during late Cenozoic extension near Las Vegas, Nevada, show temporal patterns of variation in Nd and Sr isotope ratios and in bulk chemistry. The patterns indicate that depths of magma generation were varying through time and that lithospheric mantle was partially replaced with asthenospheric mantle as extension proceeded. In alkalic rocks, is-an-element-of(Nd) changed through time from -9.1 (typical of lithospheric mantle in this area) before the onset of major (16 Ma) extension to +6.4 (typical of asthenospheric mantle) after extension (4.6 Ma). Near the end of the period of major extension (10-6 Ma), tholeiitic rocks erupted, the is-an-element-of(Nd) of which ranged from -10.1 to -7.9; this indicates that the lithosphere had not thinned sufficiently by that time to bring asthenospheric mantle into the depth range of tholeiitic magma generation (33-50 km). The lithosphere in the Las Vegas area appears to have thinned by about 50%, less than would be predicted by the magnitude of upper crustal extension (a factor of 3 or 4), and indicative of a nonuniform lithospheric response to extension. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV EARTH SCI,BERKELEY,CA 94720. RP DALEY, EE (reprint author), UNIV CALIF BERKELEY,DEPT GEOL & GEOPHYS,BERKELEY CTR ISOTOPE GEOCHEM,BERKELEY,CA 94720, USA. NR 24 TC 61 Z9 65 U1 0 U2 6 PU GEOLOGICAL SOC AMERICA PI BOULDER PA PO BOX 9140 3300 PENROSE PLACE, BOULDER, CO 80301 SN 0091-7613 J9 GEOLOGY JI Geology PD FEB PY 1992 VL 20 IS 2 BP 104 EP 108 DI 10.1130/0091-7613(1992)020<0104:IEFLTD>2.3.CO;2 PG 5 WC Geology SC Geology GA HC054 UT WOS:A1992HC05400002 ER PT J AU TURA, MAC JOHNSON, LR MAJER, EL PETERSON, JE AF TURA, MAC JOHNSON, LR MAJER, EL PETERSON, JE TI APPLICATION OF DIFFRACTION TOMOGRAPHY TO FRACTURE DETECTION SO GEOPHYSICS LA English DT Article ID RADIOACTIVE-WASTE DISPOSAL; SEISMIC DATA; WAVE; ROCK; SITE AB Two diffraction tomography techniques are applied to crosshole field data to detect fractures in granitic rock. The techniques used are the conventional back-propagation method and a new quadratic programming method incorporating constraints. In this formulation, the Born approximation is used for linearization of the inverse problem. Two dimensional (2-D) pseudo spectral finite-difference synthetic data are generated to demonstrate the inversion methods and justify use of the Born approximation. Also, using 2-D Born synthetic data, the velocity sensitivity of the inversion algorithm and reduction of fracture generated tube waves and S-waves are investigated. The inversion methods are applied to field data from the Grimsel test site in Switzerland. The data are collected from a 10 x 21.5 m rectangular area where fractures are known to exist. Data acquisition with 0.5 m spacing of three component receivers and a piezoelectric source is carried out so as to obtain a nearly complete coverage of the region. Crosshole inversions are performed on data from the receiver components in the plane of the rectangular region and normal to its boundary. As the result of a separate experiment conducted in a homogeneous region of the granitic rock, a cosine function was found to best fit the source radiation pattern. A background attenuation value is estimated for the region, using a simple statistical approach, and estimates of the wavelet are found by common source gathers, common receiver gathers, and averages of all traces. The preprocessing steps are: (1) source radiation correction, (2) attenuation correction, (3) removal of the incident wavefield, (4) muting beginning of the traces and windowing the ends, (5) wavelet deconvolution, and (6) two-and-a-half dimensional (2.5-D) corrections. This preprocessing is designed to enhance scattered P-waves that are used in the inversions. Images obtained from the application of back-propagation and quadratic programming methods to the preprocessed data show possible fracture zones that agree well at the boundaries of the region with the fracture sets observed from core samples taken from the boreholes. Although the quadratic programming method is an order of magnitude slower than the back-propagation method, as demonstrated by the synthetic examples, it proves useful by yielding high resolution images when constraints can be imposed. Transmission ray tomography is also applied to the crosshole data, and although the resolution is not as high, general agreement with the wave equation based methods is obtained. C1 UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT GEOL & GEOPHYS,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 28 TC 25 Z9 25 U1 0 U2 1 PU SOC EXPLORATION GEOPHYSICISTS PI TULSA PA 8801 S YALE ST, TULSA, OK 74137 SN 0016-8033 J9 GEOPHYSICS JI Geophysics PD FEB PY 1992 VL 57 IS 2 BP 245 EP 257 DI 10.1190/1.1443237 PG 13 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA HC981 UT WOS:A1992HC98100003 ER PT J AU REED, MJ AF REED, MJ TI GEOTHERMAL-ENERGY SO GEOTIMES LA English DT Article RP REED, MJ (reprint author), US DOE,DIV GEOTHERMAL,WASHINGTON,DC 20585, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER GEOLOGICAL INST PI ALEXANDRIA PA 4220 KING ST, ALEXANDRIA, VA 22302-1507 SN 0016-8556 J9 GEOTIMES JI Geotimes PD FEB PY 1992 VL 37 IS 2 BP 14 EP 15 PG 2 WC Geosciences, Multidisciplinary SC Geology GA HC764 UT WOS:A1992HC76400006 ER PT J AU STRAUME, T LUCAS, JN TUCKER, JD BIGBEE, WL LANGLOIS, RG AF STRAUME, T LUCAS, JN TUCKER, JD BIGBEE, WL LANGLOIS, RG TI BIODOSIMETRY FOR A RADIATION WORKER USING MULTIPLE ASSAYS SO HEALTH PHYSICS LA English DT Article DE BIODOSIMETRY; TRANSLOCATION; EXPOSURE, OCCUPATIONAL; NUCLEAR WORKERS ID GLYCOPHORIN-A LOCUS; ATOMIC-BOMB SURVIVORS; SOMATIC-CELL MUTATIONS; CHROMOSOME-ABERRATIONS; HUMAN-LYMPHOCYTES; SISTER CHROMATIDS; MUTANT FREQUENCY; IRRADIATION; ERYTHROCYTES; HYBRIDIZATION AB Four state-of-the-art biodosimeters-GPA mutations, chromosome translocations, micronuclei, and dicentrics-were used to evaluate a radiation worker who believed that the official dosimetry records substantially underestimated his actual dose. Dosimetry records indicated that the worker received 0.56 Sv during a 36-y employment history, always within the dose limits. In contrast, the worker believed that his dose equivalent may have been more than 2.5 Sv because much of the exposure was received during the early days of health physics when dosimetry capabilities and practices were not as good as they are today. Because there are no biodosimetric assays that have been fully validated for the long-term low-level exposures received by the worker, we did not expect to obtain particularly useful point-estimates of dose. However, because the discrepancy between the dosimetry records and the worker's belief was so large, we believed that biodosimetry using multiple assays together with probabilistic assessment of the uncertainties would provide useful insight. Results showed that the frequencies of chromosome translocations and GPA mutations (stable biodosimeters) were significantly elevated when compared with those for unexposed controls. Our analysis suggests that dose-equivalent estimates in the approximately 0.4 to approximately 2 Sv range (which include the value in the dosimetry records) cannot be confidently excluded at this time based on biodosimetry; however, a value greater than 2.5 Sv appears unlikely. Important new information on the temporal stability of chromosome translocations is also presented. RP STRAUME, T (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB, POB 5507, LIVERMORE, CA 94550 USA. NR 42 TC 71 Z9 73 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD FEB PY 1992 VL 62 IS 2 BP 122 EP 130 DI 10.1097/00004032-199202000-00001 PG 9 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA HA640 UT WOS:A1992HA64000002 PM 1730553 ER PT J AU HAMBY, DM AF HAMBY, DM TI SITE-SPECIFIC PARAMETER VALUES FOR THE NUCLEAR REGULATORY COMMISSIONS FOOD PATHWAY DOSE MODEL SO HEALTH PHYSICS LA English DT Article DE ENVIRONMENTAL TRANSPORT; FOOD CHAIN; HEALTH EFFECTS; NUTRITION PATHWAYS AB Routine operations at the Savannah River Site (SRS) in Western South Carolina result in radionuclide releases to the atmosphere and to the Savannah River. The resulting radiation doses to the off-site maximum individual and the off-site population within 80 km of the SRS are estimated on a yearly basis. These estimates are currently generated using dose models prescribed for the commercial nuclear power industry by-the Nuclear Regulatory Commission (NRC). The NRC provides default values for dose-model parameters for facilities without resources to develop site-specific values. A survey of land- and water-use characteristics for the Savannah River area has been conducted to determine site-specific values for water recreation, consumption, and agricultural parameters used in the NRC Regulatory Guide 1.109 (1977) dosimetric models. These site parameters include local characteristics of meat, milk, and vegetable production; recreational and commercial activities on the Savannah River; and meat, milk, vegetable, and seafood consumption rates. This paper describes how parameter data were obtained at the Savannah River Site and the impacts of such data on off-site dose. Dose estimates using site-specific parameter values are compared to estimates using the NRC default values. RP HAMBY, DM (reprint author), WESTINGHOUSE SAVANNAH RIVER CO, SAVANNAH RIVER LAB, AIKEN, SC 29808 USA. NR 13 TC 8 Z9 8 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD FEB PY 1992 VL 62 IS 2 BP 136 EP 143 DI 10.1097/00004032-199202000-00003 PG 8 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA HA640 UT WOS:A1992HA64000004 PM 1730555 ER PT J AU WHITE, CM HACKETT, J ANDERSON, RR KAIL, S SPOCK, PS AF WHITE, CM HACKETT, J ANDERSON, RR KAIL, S SPOCK, PS TI LINEAR TEMPERATURE PROGRAMMED RETENTION INDEXES OF GASOLINE RANGE HYDROCARBONS AND CHLORINATED HYDROCARBONS ON CROSS-LINKED POLYDIMETHYLSILOXANE SO HRC-JOURNAL OF HIGH RESOLUTION CHROMATOGRAPHY LA English DT Article DE LINEAR TEMPERATURE PROGRAMMED RETENTION INDEXES; GASOLINE RANGE HYDROCARBONS; CHLORINATED HYDROCARBONS; EFFECT OF COLUMN PRESSURE ON RETENTION INDEX ID CAPILLARY GAS-CHROMATOGRAPHY; FUSED-SILICA CAPILLARIES; LIQUID-CHROMATOGRAPHY; STATIONARY PHASES; MASS-SPECTROMETRY; COLUMNS; INDEXES; ALKYLBENZENES; IDENTIFICATION; REPRODUCIBILITY AB This paper describes the experimentally determined linear temperature programmed gas chromatographic retention behavior of hundreds of gasoline range hydrocarbons and chlorinated hydrocarbons on a cross-linked 100% polydimethylsiloxane stationary phase. The retention indices of additional compounds which were not available as pure standards were measured in a synthetic gasoline after they had been positively identified by matching mass and infrared spectra. The experimentally determined retention information has been used to estimate the retention indices of additional compounds by extrapolation or interpolation of plots of carbon number against retention index of homologs. Isothermally determined Kovats retention indices of compounds measured on 100% polydimethylsiloxane have been taken from the literature and converted to linear temperature programmed retention indices using the method of Guan et al [11]. For many of these compounds, an experimentally determined linear temperature programmed retention index was measured: agreement between experimental and converted values was excellent. In total, retention indices are presented for 480 compounds, including all possible alkylbenzenes containing ten or fewer carbon atoms, and over 150 monoenes and dienes. The effect of column pressure and the average linear velocity of the helium carrier gas on retention index and order of elution is described and discussed. C1 SUPELCO INC,BELLEFONTE,PA 16823. RP WHITE, CM (reprint author), PITTSBURGH ENERGY TECHNOL CTR,ANALYT RES BRANCH,POB 10940,PITTSBURGH,PA 15236, USA. NR 35 TC 35 Z9 35 U1 0 U2 2 PU DR ALFRED HUTHIG VERLAG GMBH PI HEIDELBERG 1 PA POSTFACH 102869, W-69018 HEIDELBERG 1, GERMANY SN 0935-6304 J9 HRC-J HIGH RES CHROM JI HRC-J. High Resolut. Chromatogr. PD FEB PY 1992 VL 15 IS 2 BP 105 EP 120 PG 16 WC Chemistry, Analytical SC Chemistry GA HH038 UT WOS:A1992HH03800010 ER PT J AU GUSTAVSON, DB AF GUSTAVSON, DB TI THE SCALABLE COHERENT INTERFACE AND RELATED STANDARDS PROJECTS SO IEEE MICRO LA English DT Article AB The Scalable Coherent Interface (IEEE P1596) provides bus services by transmitting packets on a collection of point-to-point unidirectional links. Its protocols support cache coherence in a distributed shared-memory multiprocessor model, with message passing, I/O, and LAN communication taking place over fiber optic or wire links. Several ongoing SCI-related projects apply the SCI technology to new areas or extend it to more difficult problems. RP GUSTAVSON, DB (reprint author), STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 18 TC 35 Z9 36 U1 2 U2 2 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 SN 0272-1732 J9 IEEE MICRO JI IEEE Micro PD FEB PY 1992 VL 12 IS 1 BP 10 EP 22 DI 10.1109/40.124376 PG 13 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA HD841 UT WOS:A1992HD84100003 ER PT J AU ZHOU, P CHENG, J SCHAUS, CF SUN, SZ HAINS, C ARMOUR, E MYERS, DR VAWTER, GA AF ZHOU, P CHENG, J SCHAUS, CF SUN, SZ HAINS, C ARMOUR, E MYERS, DR VAWTER, GA TI INVERTING AND LATCHING OPTICAL LOGIC GATES BASED ON THE INTEGRATION OF VERTICAL-CAVITY SURFACE-EMITTING LASERS AND PHOTOTHYRISTORS SO IEEE PHOTONICS TECHNOLOGY LETTERS LA English DT Article AB Inverting optical logic gates based on the monolithic integration of a vertical-cavity surface-emitting laser (VCSEL) with a heterojunction photothyristor (PNPN) are described. Logic functions INVERT, NAND, and NOR are experimentally demonstrated for the first time using latchable and cascadable PNPN/VCSEL switches, which can be triggered with very low optical energy, while producing high-optical gain and optical contrast. These gates are integrable on a single epitaxial structure to provide multifunctional logic and memory arrays. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP ZHOU, P (reprint author), UNIV NEW MEXICO,CTR HIGH TECHNOL MAT,ALBUQUERQUE,NM 87131, USA. NR 7 TC 16 Z9 16 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1041-1135 J9 IEEE PHOTONIC TECH L JI IEEE Photonics Technol. Lett. PD FEB PY 1992 VL 4 IS 2 BP 157 EP 159 DI 10.1109/68.122347 PG 3 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA HD298 UT WOS:A1992HD29800016 ER PT J AU CAMPBELL, L CARLSSON, GE DINNEEN, MJ FABER, V FELLOWS, MR LANGSTON, MA MOORE, JW MULLHAUPT, AP SEXTON, HB AF CAMPBELL, L CARLSSON, GE DINNEEN, MJ FABER, V FELLOWS, MR LANGSTON, MA MOORE, JW MULLHAUPT, AP SEXTON, HB TI SMALL DIAMETER SYMMETRICAL NETWORKS FROM LINEAR-GROUPS SO IEEE TRANSACTIONS ON COMPUTERS LA English DT Note DE CAYLEY GRAPHS; INTERCONNECTION NETWORKS; LINEAR GROUPS ID INTERCONNECTION NETWORKS AB In this note is reported a collection of constructions of symmetric networks that provide the largest known values for the number of nodes that can be placed in a network of a given degree and diameter. Some of the constructions are in the range of current potential engineering significance. The constructions are Cayley graphs of linear groups obtained by experimental computation. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. UNIV TENNESSEE,DEPT COMP SCI,KNOXVILLE,TN 37996. UNIV NEW MEXICO,DEPT MATH,ALBUQUERQUE,NM 87131. PRINCETON UNIV,DEPT MATH,PRINCETON,NJ 08540. UNIV VICTORIA,DEPT COMP SCI,VICTORIA V8W 3P6,BC,CANADA. LUCID INC,MENLO PK,CA 94025. RP CAMPBELL, L (reprint author), UNIV IDAHO,DEPT ELECT ENGN,MOSCOW,ID 83843, USA. RI Langston, Michael/A-9484-2011; OI Fellows, Michael/0000-0002-6148-9212 NR 12 TC 14 Z9 14 U1 0 U2 0 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 SN 0018-9340 J9 IEEE T COMPUT JI IEEE Trans. Comput. PD FEB PY 1992 VL 41 IS 2 BP 218 EP 220 DI 10.1109/12.123397 PG 3 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA HG227 UT WOS:A1992HG22700007 ER PT J AU AGOURIDIS, DC AF AGOURIDIS, DC TI NOISE PERFORMANCE OF OPERATIONAL-AMPLIFIER CIRCUITS - COMMENT SO IEEE TRANSACTIONS ON EDUCATION LA English DT Letter AB This correspondence comments on the presentation of the paper1 and suggests that a presentation based on the feedback amplifier theory is more efficient and accurate. RP AGOURIDIS, DC (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9359 J9 IEEE T EDUC JI IEEE Trans. Educ. PD FEB PY 1992 VL 35 IS 1 BP 98 EP 98 DI 10.1109/13.123425 PG 1 WC Education, Scientific Disciplines; Engineering, Electrical & Electronic SC Education & Educational Research; Engineering GA HH953 UT WOS:A1992HH95300015 ER PT J AU GOOGE, JM EWING, PD HESS, RA AF GOOGE, JM EWING, PD HESS, RA TI PARAMETER CORRELATION OF IMPULSE SHAPES USING 2-PORT SYNTHESIS SO IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT LA English DT Article; Proceedings Paper CT 8TH ANNUAL CONF ON THE INSTRUMENTATION AND MEASUREMENT TECHNOLOGY ( IMTC/91 ) CY MAY 14-16, 1991 CL ATLANTA, GA SP IEEE, INSTRUMENTAT MEASUREMENT SOC, IEEE, ATLANTA SECTION AB Standard techniques for testing devices and systems for their response to lightning, switching transients, and electromagnetic pulse (EMP) disturbances often call for impulse shapes characterized by double exponential functions. The double exponential impulse is defined by two time constants a and b in the function f(t) = K(e(-at) - e(-bt)). Unfortunately, the time constants and impulse parameters such as rise time, pulse duration, time to peak, and others are not directly related. The problem in generating test impulses is that the required standard impulses are sometimes defined by parameters and nomenclature lacking direct correlation to the desired time constants needed to derive component values for prototype impulse generator circuits. Historically, prototype circuits have been developed for the generation of double exponential voltage and current impulses. Component values for these prototype circuits can be calculated from approximations based on various definitions relating impulse parameters and the double exponential time constants. Various tables and approximations for the design of impulse generators have appeared in the literature as early as the 1930's. What is often lacking is the direct relationship between the time constants of the double exponential function and the given impulse parameters, as well as usable circuit design formulas. This paper derives equations for determining the time constants of the double exponential impulse from the commonly used parameters for several standard test impulses. It then proceeds to synthesize a resistor-capacitor (RC) prototype circuit that will produce the desired impulse. The prototype network is realized through a computer-aided design (CAD) procedure using Cauer's RC ladder two-port synthesis method. Descriptions of prototype circuits and test data comparing the theoretical and experimental impulse shapes are also included. The results are a simplified method for determining time constants of a double exponential function from given impulse parameters and a method for deriving the component values for prototype circuits. RP GOOGE, JM (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 7 TC 1 Z9 1 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9456 J9 IEEE T INSTRUM MEAS JI IEEE Trans. Instrum. Meas. PD FEB PY 1992 VL 41 IS 1 BP 54 EP 58 DI 10.1109/19.126631 PG 5 WC Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA HK154 UT WOS:A1992HK15400012 ER PT J AU HORN, KM DOYLE, BL SEXTON, FW AF HORN, KM DOYLE, BL SEXTON, FW TI NUCLEAR MICROPROBE IMAGING OF SINGLE-EVENT UPSETS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article ID CHARGE COLLECTION; SEU; SILICON AB An imaging technique has been developed which produces micron-resolution maps of where single-event upsets occur during ion irradiation of integrated circuits. From these "upset images" the identity and size of a circuit's upset-prone components can be directly determined. Utilizing a scanning nuclear microprobe, this imaging technique selectively exposes the lowest functional units of an integrated circuit (e.g., transistor drains, gates) and immediately measures the effect of a high-energy ion strike on circuit performance. Information about an integrated circuit's radiation hardness (i.e., total dose response and threshold upset LET), which has previously been acquired at the circuit level, can also be measured at the individual transistor level. Such detailed spatial characterization provides a new, precision diagnostic technique with which to study single-event upset processes in integrated circuits. RP HORN, KM (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 14 TC 41 Z9 41 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD FEB PY 1992 VL 39 IS 1 BP 7 EP 12 DI 10.1109/23.120129 PG 6 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA HB666 UT WOS:A1992HB66600002 ER PT J AU SREENIVAS, A KARADY, GG THIESSEN, HA AF SREENIVAS, A KARADY, GG THIESSEN, HA TI A GENERAL-METHOD FOR RESONANCE POWER-SUPPLY ANALYSIS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article AB The resonance power supply is widely used and proved to be an efficient method to supply accelerator magnets. The literature describes several power supply circuits, but no comprehensive theory of operation is presented. This paper presents a mathematical method which describes the operation of the resonance power supply and its use for the accurate design of components. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87104. RP SREENIVAS, A (reprint author), ARIZONA STATE UNIV,DEPT ELECT ENGN,TEMPE,AZ 85287, USA. NR 6 TC 1 Z9 1 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD FEB PY 1992 VL 39 IS 1 BP 29 EP 34 DI 10.1109/23.120133 PG 6 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA HB666 UT WOS:A1992HB66600006 ER PT J AU HWANG, YK AHUJA, N AF HWANG, YK AHUJA, N TI A POTENTIAL-FIELD APPROACH TO PATH PLANNING SO IEEE TRANSACTIONS ON ROBOTICS AND AUTOMATION LA English DT Article AB We present a path-planning algorithm for the classical mover's problem in three dimensions using a potential field representation of obstacles. A potential function similar to the electrostatic potential is assigned to each obstacle, and the topological structure of the free space is derived in the form of minimum potential valleys. Path planing is done at two levels. First, a global planner selects a robot's path from the minimum potential valleys and its orientations along the path that minimize a heuristic estimate of the path length and the chance of collision. Then a local planner modifies the path and orientations to derive the final collision-free path and orientations. If the local planner fails, a new path and orientations are selected by the global planner and subsequently examined by the local planner. This process is continued until a solution is found or there are no paths left to be examined. Our algorithm solves a much wider class of problems than other heuristic algorithms and at the same time runs much faster than exact algorithms (typically 5 to 30 min on a Sun 3/260). The algorithm fails on a small set of very hard problems involving tight free spaces. The performance of our algorithm is demonstrated on a variety of examples. C1 UNIV ILLINOIS, COORDINATED SCI LAB, URBANA, IL 61801 USA. UNIV ILLINOIS, BECKMAN INST, URBANA, IL 61801 USA. RP Sandia Natl Labs, Albuquerque, NM 87185 USA. NR 33 TC 200 Z9 219 U1 3 U2 21 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1042-296X J9 IEEE T ROBOTIC AUTOM JI IEEE Trans. Robot. Autom. PD FEB PY 1992 VL 8 IS 1 BP 23 EP 32 DI 10.1109/70.127236 PG 10 WC Automation & Control Systems; Engineering, Electrical & Electronic; Robotics SC Automation & Control Systems; Engineering; Robotics GA HE430 UT WOS:A1992HE43000003 ER PT J AU PHAM, H AF PHAM, H TI OPTIMAL-DESIGN OF LIFE TESTING FOR ULSI CIRCUIT MANUFACTURING SO IEEE TRANSACTIONS ON SEMICONDUCTOR MANUFACTURING LA English DT Letter AB The life testing of ultra large scale integration (ULSI) circuits is perhaps the most complex manufacturing process found today. This complexity is, in part, the result of product diversity, uncertainty, and changing technologies, and has caused the cost of testing for ULSI circuits to grow exponentially. In this paper, we develop a testing cost model and determine the optimum sample size on test which minimizes the expected total system cost assuming that the cost of waiting per unit time and the cost of placing an ULSI circuit on test are given. Numerical examples are also provided to illustrate the methods. RP PHAM, H (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,M-S 2406,IDAHO FALLS,ID 83415, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0894-6507 J9 IEEE T SEMICONDUCT M JI IEEE Trans. Semicond. Manuf. PD FEB PY 1992 VL 5 IS 1 BP 68 EP 70 DI 10.1109/66.121982 PG 3 WC Engineering, Manufacturing; Engineering, Electrical & Electronic; Physics, Applied; Physics, Condensed Matter SC Engineering; Physics GA HC425 UT WOS:A1992HC42500012 ER PT J AU GAVEL, DT AF GAVEL, DT TI SOLUTION TO THE PROBLEM OF INSTABILITY IN BANDED TOEPLITZ SOLVERS SO IEEE TRANSACTIONS ON SIGNAL PROCESSING LA English DT Note ID LINEAR EQUATIONS; MATRICES; SYSTEMS AB This correspondence presents a numerically stable approach to solving banded Toeplitz systems of n linear equations. The algorithm is "fast" in that it requires only O(nq) operations, where q is the bandwidth of the matrix. An earlier version of the banded Toeplitz algorithm presented in the literature suffers from numerical in stability. RP GAVEL, DT (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT ELECT ENGN,LIVERMORE,CA 94550, USA. NR 8 TC 3 Z9 3 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1053-587X J9 IEEE T SIGNAL PROCES JI IEEE Trans. Signal Process. PD FEB PY 1992 VL 40 IS 2 BP 464 EP 466 DI 10.1109/78.124961 PG 3 WC Engineering, Electrical & Electronic SC Engineering GA HB206 UT WOS:A1992HB20600025 ER PT J AU NAPOLITANO, LM REDINBO, GR AF NAPOLITANO, LM REDINBO, GR TI ON THE EFFICIENCY OF A NEW EFFICIENT ALGORITHM TO COMPUTE THE 2-DIMENSIONAL DISCRETE FOURIER-TRANSFORM SO IEEE TRANSACTIONS ON SIGNAL PROCESSING LA English DT Note AB The efficiency claims in a paper by Gertner, 1 based on a Radon transform for reducing the number of 1-D discrete Fourier transforms (DFT's) to compute a 2-D DFT, are offset by a costly increase in the number of additions required to perform the Radon transform. A common factor 2-D fast Fourier transform (FFT) algorithm to compute the 2-D DFT is O(N2 log2 N) computationally, whereas this new approach reduces the number of FFT additions and multiplications by 25%, but adds O(N3) additions. This correspondence narrows the benefit of the original paper to applications where very specialized architectures are used. C1 UNIV CALIF DAVIS,DAVIS,CA 95616. RP NAPOLITANO, LM (reprint author), SANDIA NATL LABS,LIVERMORE,CA 94550, USA. NR 3 TC 1 Z9 1 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1053-587X J9 IEEE T SIGNAL PROCES JI IEEE Trans. Signal Process. PD FEB PY 1992 VL 40 IS 2 BP 469 EP 470 DI 10.1109/78.124963 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA HB206 UT WOS:A1992HB20600027 ER PT J AU SINGH, SP WILSON, JH COUNCE, RM VILLIERSFISHER, JF JENNINGS, HL LUCERO, AJ REED, GD ASHWORTH, RA ELLIOTT, MG AF SINGH, SP WILSON, JH COUNCE, RM VILLIERSFISHER, JF JENNINGS, HL LUCERO, AJ REED, GD ASHWORTH, RA ELLIOTT, MG TI REMOVAL OF VOLATILE ORGANIC-COMPOUNDS FROM GROUNDWATER USING A ROTARY AIR STRIPPER SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Article AB The performance of a centrifugal vapor-liquid contactor was evaluated for air stripping of jet fuel components from groundwater. Hydraulic test data indicated that the Sherwood flooding correlation, which has been proposed for use in designing centrifugal vapor-liquid contactors, overestimates the rotational speeds at which flooding occurs. A concept of the area of a transfer unit (ATU) was introduced in the mass-transfer tests to account for the change in fluid loading with the radius of the packing torus. A new correlation based on the specific surface area of the packing for predicting ATU described the experimental data with a fair degree of accuracy. The power consumed in rotating the packing torus was found to depend mainly on the liquid flow, outer rotor radius, and rotational speed. Previous claims in the literature that the centrifugal vapor-liquid contactor is resistant to fouling because of high shear forces were not found to be valid for groundwater with high iron content. C1 USAF,TYNDALL AFB,FL 32403. OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT CHEM ENGN,KNOXVILLE,TN 37996. UNIV TENNESSEE,DEPT CIVIL ENGN,KNOXVILLE,TN 37996. RP SINGH, SP (reprint author), OAK RIDGE NATL LAB,DIV ROBOT & PROC SYST,POB 2008,BLDG 7601,MS-6306,OAK RIDGE,TN 37831, USA. NR 14 TC 95 Z9 98 U1 1 U2 13 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0888-5885 J9 IND ENG CHEM RES JI Ind. Eng. Chem. Res. PD FEB PY 1992 VL 31 IS 2 BP 574 EP 580 DI 10.1021/ie00002a019 PG 7 WC Engineering, Chemical SC Engineering GA HC653 UT WOS:A1992HC65300019 ER PT J AU PACKER, S CODERRE, J SARAF, S FAIRCHILD, R HANSROTE, J PERRY, H AF PACKER, S CODERRE, J SARAF, S FAIRCHILD, R HANSROTE, J PERRY, H TI BORON NEUTRON-CAPTURE THERAPY OF ANTERIOR-CHAMBER MELANOMA WITH P-BORONOPHENYLALANINE SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Article DE BORON NEUTRON CAPTURE; MELANOMA; PHENYLALANINE; RABBIT; RADIATION THERAPY ID MALIGNANT-MELANOMA; TUMORS AB Boron neutron capture therapy (BNCT) is a form of radiation therapy that requires selective uptake of boron by the tumor and irradiation with thermal neutrons. Phenylalanine is an amino acid precursor of melanin and when boronated (p-boronophenylalanine [BPA]) was found to be selectively taken up by Greene melanoma cells in the anterior chamber of rabbits. This tumor model was irradiated 24 hr after oral administration of BPA and was used for biodistribution studies that compared BPA and sodium pentaborate. Three groups were irradiated: group 1 (11 rabbits) received BPA followed by thermal neutron irradiation, group 2 (9 rabbits) received thermal neutron irradiation only, and group 3 (9 rabbits) served as unirradiated, undrugged control animals. Eight of the 11 tumors in group 1 were treated successfully; all tumors in groups 2 and 3 grew. Histopathologic examination did not reveal vascular or retina damage in group 1. These preliminary experiments confirm that newer boronated compounds, such as BPA, used in BNCT and improved neutron beams can provide selective irradiation of ocular melanomas. C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. RP PACKER, S (reprint author), N SHORE UNIV HOSP,CORNELL UNIV MED COLL,DEPT OPHTHALMOL,300 COMMUNITY DR,MANHASSET,NY 11030, USA. FU NEI NIH HHS [R01 EY08560] NR 24 TC 18 Z9 18 U1 1 U2 1 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB PY 1992 VL 33 IS 2 BP 395 EP 403 PG 9 WC Ophthalmology SC Ophthalmology GA HE030 UT WOS:A1992HE03000019 PM 1740371 ER PT J AU KIJIMA, N GRONSKY, R AF KIJIMA, N GRONSKY, R TI CRYSTAL-STRUCTURE OF THE HIGH-TC PHASE (TC APPROXIMATELY 111-K) IN THE SB-PB-BI-SR-CA-CU-O SYSTEM SO JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS LA English DT Article DE SUPERCONDUCTOR; CRYSTAL STRUCTURE; SB-PB-BI-SR-CA-CU-O SYSTEM; TRANSMISSION ELECTRON MICROSCOPY; ENERGY DISPERSIVE X-RAY SPECTROSCOPY ID SUPERCONDUCTOR AB The crystal structure of the high-T(c) phase (T(c) approximately 111 K) in the Sb-Pb-Bi-Sr-Ca-Cu-O system has been determined using transmission electron microscopy. Both energy dispersive X-ray spectroscopy and high-resolution transmission electron microscopy indicate that Sb partially substitutes for Ca in the high-T(c) phase (T(c) approximately 111 K) of the Sb-Pb-Bi-Sr-Ca-Cu-O system, accompanied by extra oxygen atoms that compensate the oxygen deficiency in the central Cu-O layer sandwiched between adjacent Ca/Sb layers. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,NATL CTR ELECTRON MICROSCOPY,DIV MAT SCI,BERKELEY,CA 94720. RP KIJIMA, N (reprint author), MITSUBISHI KASEI CORP,RES CTR,1000 KAMOSHIDA CHO,MIDORI KU,YOKOHAMA 227,JAPAN. NR 9 TC 3 Z9 3 U1 0 U2 0 PU JAPAN J APPLIED PHYSICS PI MINATO-KU TOKYO PA DAINI TOYOKAIJI BLDG 24-8 SHINBASHI 4-CHOME, MINATO-KU TOKYO 105, JAPAN SN 0021-4922 J9 JPN J APPL PHYS 2 JI Jpn. J. Appl. Phys. Part 2 - Lett. PD FEB 1 PY 1992 VL 31 IS 2A BP L82 EP L85 DI 10.1143/JJAP.31.L82 PG 4 WC Physics, Applied SC Physics GA HK031 UT WOS:A1992HK03100007 ER PT J AU MORRAL, JE ROMIG, AD AF MORRAL, JE ROMIG, AD TI COMPUTER-PROGRAMS FOR MODELING DIFFUSION-CONTROLLED PROCESSES SO JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY LA English DT Editorial Material C1 SANDIA NATL LABS,DEPT MET,ALBUQUERQUE,NM 87185. RP MORRAL, JE (reprint author), UNIV CONNECTICUT,STORRS,CT 06268, USA. OI Morral, John/0000-0001-9195-8254 NR 0 TC 0 Z9 0 U1 0 U2 1 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1047-4838 J9 JOM-J MIN MET MAT S JI JOM-J. Miner. Met. Mater. Soc. PD FEB PY 1992 VL 44 IS 2 BP 12 EP 14 PG 3 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA HF151 UT WOS:A1992HF15100003 ER PT J AU ORON, A ROSENAU, P AF ORON, A ROSENAU, P TI FORMATION OF PATTERNS INDUCED BY THERMOCAPILLARITY AND GRAVITY SO JOURNAL DE PHYSIQUE II LA English DT Article ID BENARD-MARANGONI CONVECTION; EVOLUTION; STABILITY; BREAKING; FILMS AB Consider a liquid film on a slightly inclined plane driven by gravity and thermocapillarity. We derive an equation describing the nonlinear evolution of the interface between the liquid and the atmosphere. In line with an approach introduced by us elsewhere we preserve the full impact of the curvature that contributes toward formation of bubbles and together with convection induced by the inclined plane contributes toward either breaking of waves or prevention of rupture that otherwise will always occur. Travelling waves are also possible. A variety of possible equilibrium states is also discussed. C1 UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP ORON, A (reprint author), TECHNION ISRAEL INST TECHNOL,DEPT MECH ENGN,IL-32000 HAIFA,ISRAEL. NR 20 TC 75 Z9 75 U1 1 U2 11 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 1155-4312 J9 J PHYS II JI J. Phys. II PD FEB PY 1992 VL 2 IS 2 BP 131 EP 146 PG 16 WC Mechanics; Physics, Atomic, Molecular & Chemical SC Mechanics; Physics GA HB144 UT WOS:A1992HB14400002 ER PT J AU MILLER, PA ANDERSON, H SPLICHAL, MP AF MILLER, PA ANDERSON, H SPLICHAL, MP TI ELECTRICAL ISOLATION OF RADIOFREQUENCY PLASMA DISCHARGES SO JOURNAL OF APPLIED PHYSICS LA English DT Article AB Plasmas used for processing of microelectronics materials are often powered by radio-frequency (rf) electrical sources. Such plasmas have nonliner impedance characteristics which cause the plasma state to depend on the nature of the circuitry that supplies electrical power to the plasma. This dependency occurs because the harmonics of the fundamental drive frequency, which are generated by the plasma nonlinearity, interact with the impedance of the external circuitry at the harmonic frequencies. This report describes the successful use of an rf filter in the power feed to the plasma which isolates the plasma electrically and eliminates its sensitivity to changes in the rf generator, cable plant, and matching network. C1 UNIV NEW MEXICO,DEPT CHEM ENGN,ALBUQUERQUE,NM 87131. RP MILLER, PA (reprint author), SANDIA NATL LABS,1126,ALBUQUERQUE,NM 87185, USA. NR 6 TC 48 Z9 48 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD FEB 1 PY 1992 VL 71 IS 3 BP 1171 EP 1176 DI 10.1063/1.351283 PG 6 WC Physics, Applied SC Physics GA HC908 UT WOS:A1992HC90800013 ER PT J AU CHASE, LL HAMZA, AV LEE, HWH AF CHASE, LL HAMZA, AV LEE, HWH TI INVESTIGATION OF OPTICAL-DAMAGE MECHANISMS IN HAFNIA AND SILICA THIN-FILMS USING PAIRS OF SUBNANOSECOND LASER-PULSES WITH VARIABLE TIME-DELAY SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID SURFACE AB Optical damage thresholds of submicron-thick, electron beam deposited HfO2 and SiO2 films on BK-7 substrates have been measured by monitoring the emission of neutral constituents during excitation with time-delayed pairs of 70-ps laser pulses at a wavelength of 1064 nm. The dependence of the optical damage threshold on time time delay provides evidence of the optical damage mechanism. For SiO2, linear absorption is the mechanism for energy deposition into the films by the laser beams. The data for HfO2 are less definitive, although linear absorption is the most likely damage mechanism. The behavior of the single-layer films is compared to multilayer HfO2-SiO2 high-reflector coatings, for which a "conditioning" effect causes an increased optical damage threshold due to multiple pulse laser excitation at fluences below the single-pulse optical damage threshold. RP CHASE, LL (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 10 TC 4 Z9 4 U1 1 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD FEB 1 PY 1992 VL 71 IS 3 BP 1204 EP 1208 DI 10.1063/1.351288 PG 5 WC Physics, Applied SC Physics GA HC908 UT WOS:A1992HC90800018 ER PT J AU COLBERT, DT MILLER, WH AF COLBERT, DT MILLER, WH TI A NOVEL DISCRETE VARIABLE REPRESENTATION FOR QUANTUM-MECHANICAL REACTIVE SCATTERING VIA THE S-MATRIX KOHN METHOD SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID INTEGRAL CROSS-SECTIONS; CONTRACTED BASIS FUNCTIONS; HARTREE-FOCK EQUATIONS; VARIATIONAL PRINCIPLE; PSEUDOSPECTRAL METHOD; REACTION PROBABILITIES; POLYATOMIC-MOLECULES; COLLINEAR REACTIONS; CHEMICAL-REACTIONS; BOUND-STATES AB A novel discrete variable representation (DVR) is introduced for use as the L2 basis of the S-matrix version of the Kohn variational method [Zhang, Chu, and Miller, J. Chem. Phys. 88, 6233 (1988)] for quantum reactive scattering. (It can also be readily used for quantum eigenvalue problems). The primary novel feature is that this DVR gives an extremely simple kinetic energy matrix (the potential energy matrix is diagonal, as in all DVRs) which is in a sense "universal," i.e., independent of any explicit reference to an underlying set of basis functions; it can, in fact, be derived as an infinite limit using different basis functions. An energy truncation procedure allows the DVR grid points to be adapted naturally to the shape of any given potential energy surface. Application to the benchmark collinear H + H2 --> H2 + H reaction shows that convergence in the reaction probabilities is achieved with only about 15% more DVR grid points than the number of conventional basis functions used in previous S-matrix Kohn calculations. Test calculations for the collinear Cl + HCl --> ClH + Cl reaction shows that the unusual dynamical features of heavy + light-heavy reactions are also well described by this approach. Since DVR approaches avoid having to evaluate integrals in order to obtain the Hamiltonian matrix and since a DVR Hamiltonian matrix is extremely sparse, this DVR version of the S-matrix Kohn approach should make it possible to deal with more complex chemical reactions than heretofore possible. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RP COLBERT, DT (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. NR 64 TC 1043 Z9 1043 U1 10 U2 90 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD FEB 1 PY 1992 VL 96 IS 3 BP 1982 EP 1991 DI 10.1063/1.462100 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HC610 UT WOS:A1992HC61000035 ER PT J AU TRUONG, TN TANNER, JJ BALA, P MCCAMMON, JA KOURI, DJ LESYNG, B HOFFMAN, DK AF TRUONG, TN TANNER, JJ BALA, P MCCAMMON, JA KOURI, DJ LESYNG, B HOFFMAN, DK TI A COMPARATIVE-STUDY OF TIME-DEPENDENT QUANTUM-MECHANICAL WAVE PACKET EVOLUTION METHODS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID MOLECULE SURFACE SCATTERING; COLLISION-INDUCED DISSOCIATION; COLLINEAR H+H2 REACTION; FOURIER METHOD SOLUTION; + BC COLLISION; SCHRODINGER-EQUATION; PHOTODISSOCIATION DYNAMICS; RATE CONSTANTS; INTERACTION REPRESENTATION; WAVEPACKET CALCULATIONS AB We present a detailed comparison of the efficiency and accuracy of the second- and third-order split operator methods, a time dependent modified Cayley method, and the Chebychev polynomial expansion method for solving the time dependent Schrodinger equation in the one-dimensional double well potential energy function. We also examine the efficiency and accuracy of the split operator and modified Cayley methods for the imaginary time propagation. C1 UNIV HOUSTON,DEPT PHYS,HOUSTON,TX 77204. UNIV WARSAW,DEPT BIOPHYS,PL-02089 WARSAW,POLAND. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NICHOLAS COPERNICUS UNIV,INST PHYS,PL-87100 TORUN,POLAND. RP TRUONG, TN (reprint author), UNIV HOUSTON,DEPT CHEM,HOUSTON,TX 77204, USA. RI Bala, Piotr/M-6727-2015 OI Bala, Piotr/0000-0001-7410-7482 NR 97 TC 68 Z9 68 U1 0 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD FEB 1 PY 1992 VL 96 IS 3 BP 2077 EP 2084 DI 10.1063/1.462870 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HC610 UT WOS:A1992HC61000048 ER PT J AU SHEPARD, R LISCHKA, H SZALAY, PG KOVAR, T ERNZERHOF, M AF SHEPARD, R LISCHKA, H SZALAY, PG KOVAR, T ERNZERHOF, M TI A GENERAL MULTIREFERENCE CONFIGURATION-INTERACTION GRADIENT PROGRAM SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID POTENTIAL-ENERGY HYPERSURFACES; CORRELATED WAVE-FUNCTIONS; COUPLED-CLUSTER THEORY; INFRARED INTENSITIES; MOLECULAR GRADIENTS; DERIVATIVES; WAVEFUNCTIONS; ABINITIO; IMPLEMENTATION; HESSIANS AB An efficient and general method for the computation of analytic energy gradients and energy response properties for general MRCI (multireference configuration interaction) and ACPF (averaged coupled pair functional) wave functions is presented. This methodology includes a general approach, based on successive orbital transformations, for the inclusion of the effects of various orbital resolution (canonicalization) constraints. Initial implementation in the COLUMBUS Program System demonstrates, particularly for large-scale multireference wave functions, that the additional computational effort required for the energy gradient is a small fraction of that required for the energy. For polyatomic molecules, the computational resources required for the energy gradient do not depend explicitly on the number of constituent atoms. This combination of features represents a major step forward in the computation and characterization of molecular potential energy surfaces. C1 UNIV VIENNA, INST THEORET CHEM & STRAHLENCHEM, A-1090 VIENNA, AUSTRIA. UNIV BONN, INST PHYS & THEORET CHEM, W-5300 BONN, GERMANY. RP SHEPARD, R (reprint author), ARGONNE NATL LAB, DIV MED, THEORET CHEM GRP, ARGONNE, IL 60439 USA. RI Lischka, Hans/A-8802-2015; Szalay, Peter/C-8879-2015 OI Szalay, Peter/0000-0003-1885-3557 NR 53 TC 169 Z9 169 U1 0 U2 13 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD FEB 1 PY 1992 VL 96 IS 3 BP 2085 EP 2098 DI 10.1063/1.462060 PG 14 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HC610 UT WOS:A1992HC61000049 ER PT J AU ROHLFING, CM RAGHAVACHARI, K AF ROHLFING, CM RAGHAVACHARI, K TI ELECTRONIC-STRUCTURES AND PHOTOELECTRON-SPECTRA OF SI3- AND SI4- SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID CAS SCF/CI CALCULATIONS; SMALL SILICON CLUSTERS; GROUND-STATE; SI-3; SI2C AB Vibrationally resolved photoelectron spectra of Si3 and Si4-, recently reported by Kitsopoulos, Chick, Weaver, and Neumark, are interpreted using ab initio quantum chemical calculations of the ground and excited electronic states of the corresponding neutral clusters. The calculated electron affinities as well as the low-lying excitation energies agree within 0.1-0.2 eV of the experimental values, thus confirming the theoretically predicted structures of neutral and anionic Si3 and Si4 reported previously. C1 AT&T BELL LABS,MURRAY HILL,NJ 07974. RP ROHLFING, CM (reprint author), SANDIA NATL LABS,DIV THEORET,LIVERMORE,CA 94551, USA. NR 13 TC 134 Z9 136 U1 0 U2 10 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD FEB 1 PY 1992 VL 96 IS 3 BP 2114 EP 2117 DI 10.1063/1.462062 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HC610 UT WOS:A1992HC61000051 ER PT J AU MCDOWELL, HK AF MCDOWELL, HK TI A THEORY OF ELECTRON BATHS - ONE-ELECTRON SYSTEM DYNAMICS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID GENERALIZED LANGEVIN THEORY; MANY-BODY PROBLEMS; SURFACE SCATTERING; CHEMICAL-DYNAMICS; EQUATION APPROACH; EQUIVALENT CHAIN; FORMULATION AB The second-quantized, many-electron, atomic, and molecular Hamiltonian is partitioned both by the identity or labeling of the spin orbitals and by the dynamics of the spin orbitals into a system coupled to a bath. The electron bath is treated by a molecular time scale generalized Langevin equation approach designed to include one-electron dynamics in the system dynamics. The bath is formulated as an equivalent chain of spin orbitals through the introduction of equivalent-chain annihilation and ercation operators. Both the dynamics and the quantum grand canonical statistical properties of the electron bath are examined. Two versions for the statistical properties of the bath are pursued. Using a weak bath assumption, a bath statistical average is defined which allows one to achieve a reduced dynamics description of the electron system which is coupled to the electron bath. In a strong bath assumption effective Hamiltonians are obtained which reproduce the dynamics of the bath and which lead to the same results as found in the weak bath assumption. The effective (but exact) Hamiltonian is found to be a one-electron Hamiltonian. A reduced dynamics equation of motion for the system population matrix is derived and found to agree with a previous version. This equation of motion is useful for studying electron transfer in the system when coupled to an electron bath. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. NR 24 TC 2 Z9 2 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD FEB 1 PY 1992 VL 96 IS 3 BP 2127 EP 2140 DI 10.1063/1.462064 PG 14 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HC610 UT WOS:A1992HC61000053 ER PT J AU BARNETT, RN REYNOLDS, PJ LESTER, WA AF BARNETT, RN REYNOLDS, PJ LESTER, WA TI COMPUTATION OF TRANSITION DIPOLE-MOMENTS BY MONTE-CARLO SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID QUANTUM-CHEMISTRY; RANDOM-WALK; MOLECULAR-SYSTEMS; GREEN-FUNCTION; GROUND-STATE; ENERGY; LIH AB Three Monte Carlo methods for computing transition dipole moments are presented. Two of these approaches are based on the use of multiple Monte Carlo "random walks" to sample different probability distributions. The remaining technique employs a single Monte Carlo walk and averages an analytic approximation to the Green's function to sample other distributions. The accuracy and efficiency of each method is investigated by computing the transition dipole moment between the 1s and 2p(x) states of the hydrogen atom. Monte Carlo parameters, such as the time step size and the convergence time, are varied in order to study their effect on computed results. It is found that the approach based on a guided Metropolis walk with quantum Monte Carlo "side walks" and also the approach based on Green's function averages yield accurate transition dipole moments efficiently. These two methods also yield accurate energies and expectation values for the individual eigenstates. The approach based on two equivalent quantum Monte Carlo walks, one for each state, is found to be least satisfactory. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. RP BARNETT, RN (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720, USA. NR 37 TC 25 Z9 25 U1 0 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD FEB 1 PY 1992 VL 96 IS 3 BP 2141 EP 2154 DI 10.1063/1.462065 PG 14 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HC610 UT WOS:A1992HC61000054 ER PT J AU LYNCH, JJ RAINWATER, JC VANPOOLEN, LJ SMITH, DH AF LYNCH, JJ RAINWATER, JC VANPOOLEN, LJ SMITH, DH TI PREDICTION OF FLUID PHASE-EQUILIBRIUM OF TERNARY MIXTURES IN THE CRITICAL REGION AND THE MODIFIED LEUNG-GRIFFITHS THEORY SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID VAPOR-LIQUID-EQUILIBRIUM; CRITICAL-POINTS; SYSTEMS AB The modified Leung-Griffiths theory of vapor-liquid equilibrium (VLE) is generalized to the case of three components. The principle of "corresponding states" is reconsidered along with certain functions of "field variables" within the model. The mathematical form of the coexistence boundary in terms of the field variables remains practically unchanged and conforms to modern scaling theory. The new model essentially predicts ternary fluid mixture phase boundaries in the critical region from previous vapor-liquid equilibrium data correlations of the three binary fluid mixture limits. Predicted saturation isotherms of the ethane + n-butane + n-pentane and ethane + n-butane + n-heptane mixtures are compared with experimental ternary VLE data in the literature. C1 NATL INST STANDARDS & TECHNOL,DIV THERMOPHYS,BOULDER,CO 80303. RP LYNCH, JJ (reprint author), US DOE,MORGANTOWN ENERGY TECHNOL CTR,MORGANTOWN,WV 26507, USA. NR 29 TC 4 Z9 4 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD FEB 1 PY 1992 VL 96 IS 3 BP 2253 EP 2260 DI 10.1063/1.462075 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HC610 UT WOS:A1992HC61000064 ER PT J AU SUN, ZW BARNETT, RN LESTER, WA AF SUN, ZW BARNETT, RN LESTER, WA TI OPTIMIZATION OF A MULTIDETERMINANT WAVE-FUNCTION FOR QUANTUM MONTE-CARLO - LI2 (X1-SIGMA+G) SO JOURNAL OF CHEMICAL PHYSICS LA English DT Note C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. RP SUN, ZW (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720, USA. NR 6 TC 18 Z9 18 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD FEB 1 PY 1992 VL 96 IS 3 BP 2422 EP 2423 DI 10.1063/1.462043 PG 2 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HC610 UT WOS:A1992HC61000086 ER PT J AU COLLER, BS SPRINGER, KT BEER, JH MOHANDAS, N SCUDDER, LE NORTON, KJ WEST, SM AF COLLER, BS SPRINGER, KT BEER, JH MOHANDAS, N SCUDDER, LE NORTON, KJ WEST, SM TI THROMBOERYTHROCYTES - INVITRO STUDIES OF A POTENTIAL AUTOLOGOUS, SEMIARTIFICIAL ALTERNATIVE TO PLATELET TRANSFUSIONS SO JOURNAL OF CLINICAL INVESTIGATION LA English DT Article DE PLATELETS; ERYTHROCYTES; RGD PEPTIDES; GPIIB/GPIIIA RECEPTORS ID MURINE MONOCLONAL-ANTIBODY; GLYCOPROTEINS-IIB; GLYCOPHORIN-A; AGGREGATION; BLOOD; FIBRINOGEN; IIIA; CELL; DEFORMABILITY; ERYTHROCYTES AB In an attempt to overcome the limitations and drawbacks of using fresh platelets for transfusion therapy of thrombocytopenic patients, we have performed in vitro experiments on an autologous, semi-artificial alternative to platelet transfusions. Based on our previous studies of the interactions of unactivated and activated platelets with beads coated with peptides of various lengths, all of which contained the arginine-glycine-aspartic acid (RGD) cell recognition sequence, the peptide Ac-CGGRGDF-NH2 was chosen for covalent coupling to erythrocytes. A heterobifunctional crosslinking reagent (N-maleimido-6-aminocaproyl ester of 1-hydroxy-2-nitrobenzene-4-sulfonic acid) was used to crosslink via the peptide's free sulfhydryl group and the erythrocyte's surface amino groups. Approximately 0.5-1.5 x 10(6) peptide molecules bound per erythrocyte after 2 h of incubation, and most of the peptides appeared to crosslink to glycophorin A. The resulting cells, termed thromboerythrocytes, interacted selectively with activated platelets to form mixed aggregates. Studies with fluid phase RGD peptides and monoclonal antibodies indicated that the RGD peptides on the thromboerythrocytes interacted with the GPIIb/IIIa receptors on activated platelets. Thromboerythrocytes could also bind to platelets adherent to collagen. There was minimal erythrocyte hemolysis during the formation of thromboerythrocytes and studies of thromboerythrocyte osmotic fragility and cellular deformability showed no significant changes from control erythrocytes. Whereas there is a 20:1 ratio of erythrocytes to platelets in the circulation of normal individuals, the erythrocytes from as little as 50 ml of blood could be transformed into the equivalent of 2 U of platelets by numbers (equivalent to 18 U of platelets by mass), and reinfused into the same individual within several hours. These data encourage us to proceed to in vivo studies to assess the hemostatic efficacy of thromboerythrocytes in thrombocytopenic animals. C1 UNIV HOSP BERN,THROMBOSIS RES LAB,CH-3010 BERN,SWITZERLAND. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CELL & MOLEC BIOL,BERKELEY,CA 94720. RP COLLER, BS (reprint author), SUNY STONY BROOK,DIV HEMATOL,STONY BROOK,NY 11794, USA. FU PHS HHS [19278, 26263] NR 47 TC 68 Z9 68 U1 0 U2 2 PU ROCKEFELLER UNIV PRESS PI NEW YORK PA 1114 FIRST AVE, 4TH FL, NEW YORK, NY 10021 SN 0021-9738 J9 J CLIN INVEST JI J. Clin. Invest. PD FEB PY 1992 VL 89 IS 2 BP 546 EP 555 DI 10.1172/JCI115619 PG 10 WC Medicine, Research & Experimental SC Research & Experimental Medicine GA HD270 UT WOS:A1992HD27000028 PM 1737845 ER PT J AU MOHANDAS, N WINARDI, R KNOWLES, D LEUNG, A PARRA, M GEORGE, E CONBOY, J CHASIS, J AF MOHANDAS, N WINARDI, R KNOWLES, D LEUNG, A PARRA, M GEORGE, E CONBOY, J CHASIS, J TI MOLECULAR-BASIS FOR MEMBRANE RIGIDITY OF HEREDITARY OVALOCYTOSIS - A NOVEL MECHANISM INVOLVING THE CYTOPLASMIC DOMAIN OF BAND-3 SO JOURNAL OF CLINICAL INVESTIGATION LA English DT Note DE RED CELLS; BAND-3; ANION TRANSPORTER; MALARIA ID HUMAN-ERYTHROCYTE MEMBRANE; LATERAL MOBILITY; MALARIA PARASITES; GLYCOPHORIN-A; PROTEIN; DEFORMABILITY; MELANESIANS; TEMPERATURE; INVASION; RECOVERY AB Hereditary ovalocytic red cells are characterized by a marked increase in membrane rigidity and resistance to invasion by malarial parasites. The underlying molecular defect in ovalocytes remained a mystery until Liu and colleagues (N. Engl. J. Med. 1990. 323:1530-38) made the surprising observation that the ovalocytic phenotype was linked to a structural polymorphism in band 3, the anion transporter. We have now defined the mutation in band 3 gene and established the biophysical sequelae of this mutation. This mutation involves the deletion of amino-acids 400-408 in the boundary between the cytoplasmic and the first transmembrane domains of band 3. The biophysical consequences of this mutation are a marked decrease in lateral mobility of band 3 and an increase in membrane rigidity. Based on these findings, we propose the following model for increased membrane rigidity. The mutation induces a conformational change in the cytoplasmic domain of band 3, leading to its entanglement in the skeletal protein network. This entanglement inhibits the normal unwinding and stretching of the spectrin tetramers necessary for membrane extension, leading to increased rigidity. These findings imply that the cytoplasmic domain of an integral membrane protein can have profound effects on membrane material behavior. C1 UNIV BRITISH COLUMBIA,VANCOUVER V6T 1W5,BC,CANADA. UNIV KEBANGSAAN MALAYSIA,KUALA LUMPUR,MALAYSIA. RP MOHANDAS, N (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CELL & MOLEC BIOL,1 CYCLOTRON RD,MS 74-157,BERKELEY,CA 94720, USA. FU NIDDK NIH HHS [DK26263, DK32094] NR 36 TC 126 Z9 126 U1 0 U2 1 PU ROCKEFELLER UNIV PRESS PI NEW YORK PA 1114 FIRST AVE, 4TH FL, NEW YORK, NY 10021 SN 0021-9738 J9 J CLIN INVEST JI J. Clin. Invest. PD FEB PY 1992 VL 89 IS 2 BP 686 EP 692 DI 10.1172/JCI115636 PG 7 WC Medicine, Research & Experimental SC Research & Experimental Medicine GA HD270 UT WOS:A1992HD27000045 PM 1737855 ER PT J AU WONG, H MORRIS, S RADKE, CJ AF WONG, H MORRIS, S RADKE, CJ TI 3-DIMENSIONAL MENISCI IN POLYGONAL CAPILLARIES SO JOURNAL OF COLLOID AND INTERFACE SCIENCE LA English DT Article ID CROSS-SECTION; FREE SURFACES; LAMINAR-FLOW; GRAVITY; FLUID C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV EARTH SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT MECH,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. RI Wong, Harris/F-6097-2013 OI Wong, Harris/0000-0001-9402-6778 NR 21 TC 96 Z9 96 U1 0 U2 18 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9797 J9 J COLLOID INTERF SCI JI J. Colloid Interface Sci. PD FEB PY 1992 VL 148 IS 2 BP 317 EP 336 DI 10.1016/0021-9797(92)90171-H PG 20 WC Chemistry, Physical SC Chemistry GA HB051 UT WOS:A1992HB05100003 ER PT J AU BORGERS, C LARSEN, EW ADAMS, ML AF BORGERS, C LARSEN, EW ADAMS, ML TI THE ASYMPTOTIC DIFFUSION LIMIT OF A LINEAR DISCONTINUOUS DISCRETIZATION OF A 2-DIMENSIONAL LINEAR TRANSPORT-EQUATION SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID MEAN FREE PATHS; OPTICALLY THICK; REGIMES C1 UNIV MICHIGAN,DEPT NUCL ENGN,ANN ARBOR,MI 48109. IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP BORGERS, C (reprint author), UNIV MICHIGAN,DEPT MATH,ANN ARBOR,MI 48109, USA. NR 15 TC 11 Z9 11 U1 1 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD FEB PY 1992 VL 98 IS 2 BP 285 EP 300 DI 10.1016/0021-9991(92)90143-M PG 16 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA HE486 UT WOS:A1992HE48600008 ER PT J AU RAMBO, PW DENAVIT, J AF RAMBO, PW DENAVIT, J TI TIME-IMPLICIT FLUID SIMULATION OF COLLISIONAL PLASMAS SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article RP RAMBO, PW (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 10 TC 24 Z9 24 U1 0 U2 3 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD FEB PY 1992 VL 98 IS 2 BP 317 EP 331 DI 10.1016/0021-9991(92)90145-O PG 15 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA HE486 UT WOS:A1992HE48600010 ER PT J AU TANI, K AZUMI, M DEVOTO, RS AF TANI, K AZUMI, M DEVOTO, RS TI NUMERICAL-ANALYSIS OF 2D-MHD-EQUILIBRIUM WITH NONINDUCTIVE PLASMA CURRENT IN TOKAMAKS SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID DRIVEN C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP TANI, K (reprint author), JAPAN ATOM ENERGY RES INST,IBARAKI 31101,JAPAN. NR 17 TC 91 Z9 91 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD FEB PY 1992 VL 98 IS 2 BP 332 EP 341 DI 10.1016/0021-9991(92)90146-P PG 10 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA HE486 UT WOS:A1992HE48600011 ER PT J AU CARAMANA, EJ WEBSTER, RB AF CARAMANA, EJ WEBSTER, RB TI PARAMETERIZED SOLUTION OF ONE-DIMENSIONAL THERMAL-DIFFUSION WITH A HEAT-SOURCE AND A MOVING BOUNDARY SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Note RP CARAMANA, EJ (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,GRP X4,MS-F664,LOS ALAMOS,NM 87545, USA. NR 6 TC 1 Z9 1 U1 0 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD FEB PY 1992 VL 98 IS 2 BP 342 EP 346 DI 10.1016/0021-9991(92)90147-Q PG 5 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA HE486 UT WOS:A1992HE48600012 ER PT J AU VAN DE WALLE, CG LAKS, DB NEUMARK, GF PANTELIDES, ST AF VAN DE WALLE, CG LAKS, DB NEUMARK, GF PANTELIDES, ST TI SOLUBILITIES, DEFECT REACTIONS AND DOPING LIMITS IN ZNSE SO JOURNAL OF CRYSTAL GROWTH LA English DT Article ID P-TYPE ZNSE; GROWTH AB We have developed a theoretical formalism to determine concentrations of native defects and impurities in semiconductors, and applied it to the problem of p-type doping in ZnSe. Limitations in the achievable hole concentrations are not due to native defect compensation. Two mechanisms are responsible: one is the competition between various substitutional and interstitial configurations, the other is the solubility limit imposed by formation of other phases. A comprehensive examination of Li, Na and N acceptors in ZnSe is presented. C1 PHILIPS LABS, BRIARCLIFF MANOR, NY 10510 USA. SOLAR ENERGY RES INST, GOLDEN, CO 80401 USA. COLUMBIA UNIV, DIV MET & MAT SCI, NEW YORK, NY 10027 USA. IBM CORP, THOMAS J WATSON RES CTR, YORKTOWN HTS, NY 10598 USA. RI Van de Walle, Chris/A-6623-2012 OI Van de Walle, Chris/0000-0002-4212-5990 NR 18 TC 9 Z9 9 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 EI 1873-5002 J9 J CRYST GROWTH JI J. Cryst. Growth PD FEB PY 1992 VL 117 IS 1-4 BP 704 EP 709 DI 10.1016/0022-0248(92)90840-F PG 6 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA HM058 UT WOS:A1992HM05800137 ER PT J AU KWONG, MK MCLEOD, JB PELETIER, LA TROY, WC AF KWONG, MK MCLEOD, JB PELETIER, LA TROY, WC TI ON GROUND-STATE SOLUTIONS OF - DELTA-U = UP-UQ SO JOURNAL OF DIFFERENTIAL EQUATIONS LA English DT Article ID POSITIVE SOLUTIONS C1 UNIV PITTSBURGH,DEPT MATH & STAT,PITTSBURGH,PA 15260. LEIDEN UNIV,INST MATH,2300 RA LEIDEN,NETHERLANDS. RP KWONG, MK (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439, USA. NR 5 TC 10 Z9 12 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0022-0396 J9 J DIFFER EQUATIONS JI J. Differ. Equ. PD FEB PY 1992 VL 95 IS 2 BP 218 EP 239 DI 10.1016/0022-0396(92)90030-Q PG 22 WC Mathematics SC Mathematics GA HE416 UT WOS:A1992HE41600002 ER PT J AU BINER, SB AF BINER, SB TI A PROCEDURE FOR DETERMINATION OF THE STRAIN DISTRIBUTION DURING SIMULATION OF METAL-FORMING USING MODEL MATERIAL TECHNIQUES SO JOURNAL OF ENGINEERING FOR INDUSTRY-TRANSACTIONS OF THE ASME LA English DT Article AB In this study, a simple and computationally efficient procedure is introduced for determination of the strain distribution during the simulations of forming processes using model material techniques. Forward-backward extrusion process is analyzed by using FEM and the model material techniques. The strain fields obtained from both methods compared favorably with each other. The advantages and the limitations of the techniques are elucidated together with suggested recommendations. RP BINER, SB (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 0 TC 3 Z9 3 U1 0 U2 0 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0022-0817 J9 J ENG IND-T ASME JI J. Eng. Ind.-Trans. ASME PD FEB PY 1992 VL 114 IS 1 BP 94 EP 99 PG 6 WC Engineering, Mechanical SC Engineering GA HP737 UT WOS:A1992HP73700012 ER PT J AU ROCK, CD HEATH, TG ZEEVAART, JAD AF ROCK, CD HEATH, TG ZEEVAART, JAD TI 2-TRANS-ABSCISIC ACID BIOSYNTHESIS AND METABOLISM OF ABA-ALDEHYDE AND XANTHOXIN IN WILD-TYPE AND THE ABA MUTANT OF ARABIDOPSIS-THALIANA SO JOURNAL OF EXPERIMENTAL BOTANY LA English DT Article DE ABA-ALCOHOL; ABA-ALDEHYDE; ABA-GLUCOSE ESTER; (O2)O-18 LABELING; PHASEIC ACID ID CELL-FREE PREPARATIONS; ABSCISIC-ACID; MOLECULAR-OXYGEN; TOMATO; FLACCA; FRAGMENTATION; ACCUMULATION; IONIZATION; CONVERSION; SITIENS AB Abscisic acid (ABA) and 2-trans-ABA (t-ABA) biosynthesis were studied in wild type Landsberg erecta and the three allelic aba mutants of Arabidopsis thaliana (L.) Heynh., which are impaired in epoxy-carotenoid biosynthesis. Labelling experiments with O-18(2) and mass spectrometric analysis of [O-18]ABA and its catabolites ABA-glucose ester (ABA-GE) and phaseic acid (PA), and t-ABA and t-ABA-GE, showed that t-ABA biosynthesis was less affected than ABA biosynthesis by mutations at the ABA locus. The aba-4 allele caused the most severe impairment of ABA biosynthesis compared with the other two mutant alleles aba-1 and aba-3, yet aba-4 plants synthesized as much t-ABA as wild type Landsberg erecta plants. Feeding experiments with RS-[H-2(6)]ABA-aldehyde isomers and unlabelled xanthoxin isomers suggest that t-xanthoxin and t-ABA-aldehyde are precursors to ABA and t-ABA in Arabidopsis. C1 MICHIGAN STATE UNIV,MUS DOE PLANT RES LAB,E LANSING,MI 48824. MICHIGAN STATE UNIV,NIH,FACIL MASS SPECTROMETRY,E LANSING,MI 48824. NR 27 TC 8 Z9 8 U1 1 U2 5 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0022-0957 J9 J EXP BOT JI J. Exp. Bot. PD FEB PY 1992 VL 43 IS 247 BP 249 EP 256 DI 10.1093/jxb/43.2.249 PG 8 WC Plant Sciences SC Plant Sciences GA HE546 UT WOS:A1992HE54600016 ER PT J AU WOHLHUTER, FK BASARAN, OA AF WOHLHUTER, FK BASARAN, OA TI SHAPES AND STABILITY OF PENDANT AND SESSILE DIELECTRIC DROPS IN AN ELECTRIC-FIELD SO JOURNAL OF FLUID MECHANICS LA English DT Article ID AXISYMMETRIC SHAPES; MAGNETIC-FIELDS; CHARGED DROPS; EQUILIBRIUM; FLUID; OSCILLATIONS; DROPLETS; SURFACE; TENSION; FLOW AB Axisymmetric equilibrium shapes and stability of linearly polarizable dielectric (ferrofluid) drops of fixed volume which are pendant/sessile on one plate of a parallel-plate capacitor and are subjected to an applied electric (magnetic) field are determined by solving simultaneously the free boundary problem comprised of the Young-Laplace equation for drop shape and the Laplace equation for electric (magnetic) field distribution. When the contact angle that the drop makes with the plate is fixed to be 90-degrees and the distance between the plates is infinite, the results are identical to those of a free drop immersed in a uniform field and resolve discrepancies between previously reported theoretical predictions and experimental measurements. Remarkably, regardless of the value of the ratio of the permittivity (permeability) of the drop to that of the surrounding fluid, kappa, drop shapes develop conical tips as drop deformation increases. However, three types of behaviour are found, depending on the value of kappa. When kappa < kappa-1, the drop deformation grows without bound as field strength rises. On the other hand, when kappa > kappa-2 > kappa-1, families of equilibrium drop shapes become unstable at turning points with respect to field strength. Beyond the turning points, the unstable families terminate: the mean curvature at the virtually conical drop tip grows without bound. However, in the range kappa-1 < kappa < kappa-2, the new results predict that drop deformation exhibits hysteresis, in accord with experiments of Bacri, Salin & Massart (1982) and Bacri & Salin (1982, 1983). Such hysteresis phenomena have been surmized previously on the basis of approximate theories, though they have not been calculated systematically until now. Moreover, detailed computations reveal the importance of varying the drop size and plate spacing, and whether, along the three-phase contact line, the contact line is fixed or the contact angle is prescribed. C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. RP WOHLHUTER, FK (reprint author), UNIV TENNESSEE,DEPT CHEM ENGN,KNOXVILLE,TN 37996, USA. NR 54 TC 65 Z9 65 U1 2 U2 25 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0022-1120 J9 J FLUID MECH JI J. Fluid Mech. PD FEB PY 1992 VL 235 BP 481 EP 510 DI 10.1017/S0022112092001198 PG 30 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA HF765 UT WOS:A1992HF76500020 ER PT J AU APPELMAN, EH DUNKELBERG, O KOL, M AF APPELMAN, EH DUNKELBERG, O KOL, M TI HYPOFLUOROUS ACID AND ACETONITRILE - THE TAMING OF A REAGENT SO JOURNAL OF FLUORINE CHEMISTRY LA English DT Article ID ELEMENTAL FLUORINE; INFRARED-SPECTRA; HOF; EPOXIDATION; OXYGEN; HYDROXYLATION; OLEFINS; SYSTEM; PROTON AB The strong oxidant produced by the reaction of elemental fluorine with acetonitrile containing ca. 10% water has been shown to be hypofluorous acid, HOF, which is stabilized by complexing to the solvent. The reaction represents a new and convenient method of preparing and handling HOF, a unique oxygenating reagent. The presence of acetonitrile results in subtle but significant changes in the chemical behavior of the HOF. Vibrational and NMR spectroscopic studies of the solutions resulting from this reaction, as well as of solutions prepared by dissolving neat HOF in dry acetonitrile, have shown that the complex is a 1:1 hydrogen-bridged entity, in which the HOF proton is most likely bonded to the nitrogen atom of the nitrile. The F-19 NMR data indicate that the complexation reaction has an equilibrium constant of ca. 3 at room temperature, and that the enthalpy of formation of the complex is -14.3+/-0.5 kJ mol-1. The success of this method of synthesizing hypofluorous acid is a consequence of the very slow reaction between HOF and low concentrations of water in acetonitrile. This reaction accelerates drastically as the water content increases. As the solution composition approaches 100% water, the rate constant appears to approach a limit of about 0.7 s-1 at 25-degrees-C, which may be the actual rate of reaction of HOF with the water. C1 RUHR UNIV BOCHUM,W-4630 BOCHUM 1,GERMANY. TEL AVIV UNIV,SCH CHEM,IL-69978 TEL AVIV,ISRAEL. RP APPELMAN, EH (reprint author), ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439, USA. NR 34 TC 19 Z9 19 U1 0 U2 1 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0022-1139 J9 J FLUORINE CHEM JI J. Fluor. Chem. PD FEB PY 1992 VL 56 IS 2 BP 199 EP 213 DI 10.1016/S0022-1139(00)81103-3 PG 15 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA JJ299 UT WOS:A1992JJ29900009 ER PT J AU OKUDA, H AF OKUDA, H TI STRUCTURE OF THE MAGNETOPAUSE CURRENT LAYER AT THE SUBSOLAR POINT SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article; Proceedings Paper CT WORKSHOP ON PLASMASPHERE REFILLING CY OCT 15-16, 1990 CL UNIV ALABAMA, HUNTSVILLE, AL HO UNIV ALABAMA ID ISEE AB A one-dimensional electromagnetic particle simulation model developed for the magnetopause current layer between the shocked solar wind and the dipole magnetic field at the subsolar point has been extended to include the interplanetary magnetic field (IMF) in the solar wind. Interaction of the solar wind with the vacuum dipole field as well as the dipole field filled with a low-density magnetospheric plasma are studied. It is found that the width and the structure of the magnetopause current layer differ markedly depending on the direction of the IMF. When the IMF is pointing southward, the current layer between the solar wind and the dipole field is narrow, and the magnetic field has a single ramp structure caused by the reflection of the solar wind at that point. The current layer becomes several times wider and the magnetic field develops a multiple ramp structure when the IMF is northward. This broadening of the current layer is caused by the multiple reflection of the solar wind by the magnetic field. For the northward IMF the magnetic field does not change its sign across the current layer, so that the E x B drift of the solar wind electrons remains the same direction, while for the southward IMF is reverses the sign. This results in a single reflection of the solar wind for the southward IMF and multiple reflections for the northward IMF. When a low-density magnetospheric plasma is present in the dipole magnetic field, a small fraction of the solar wind ions are found to penetrate into the dipole magnetic field beyond the reflection point of the solar wind electrons. The width of the ion current layer is of the order of the solar wind ion gyroradius; however, the current associated with the ions remains much smaller than the electron current so long as the density of the magnetospheric plasma is much smaller than the density of the solar wind. Comparisons of our simulation results with the recent spacecraft data of the magnetopause crossing near the subsolar point are provided. RP OKUDA, H (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08453, USA. NR 16 TC 5 Z9 5 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES JI J. Geophys. Res-Space Phys. PD FEB 1 PY 1992 VL 97 IS A2 BP 1389 EP 1395 DI 10.1029/91JA02408 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HB870 UT WOS:A1992HB87000028 ER PT J AU CHENG, CZ AF CHENG, CZ TI MAGNETOSPHERIC EQUILIBRIUM WITH ANISOTROPIC PRESSURE SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID MAGNETIC-FIELD; PLASMA SHEET; RING CURRENT; MODEL; URANUS AB Self-consistent magnetospheric equilibria with anisotropic pressure are obtained by employing an iterative metric method for solving the inverse equilibrium equation in an optimal flux coordinate system. A method of determining plasma parallel and perpendicular pressures from either analytic particle distributions or particle distributions measured along a satellite's path is presented. The numerical results of axisymmetric magnetospheric equilibria including the effects of finite beta, pressure anisotropy, and boundary conditions are presented for a bi-Maxwellian particle distribution. For the isotropic pressure cases the finite beta effect produces an outward expansion of the constant magnetic flux surfaces in relation to the dipole field lines, and along the magnetic field the toroidal ring current is maximum at the magnetic equator. The effect of pressure anisotropy is found to further expand the flux surfaces outward. Along the magnetic field lines the westward ring current can be peak away from the equator owing to an eastward current contribution resulting from pressure anisotropy. As pressure anisotropy increases, the peak westward current can become more singular. The outer boundary flux surface has a significant effect on the magnetospheric equilibrium. For the outer flux boundary resembling the dayside compressed flux surface due to solar wind pressure, the deformation of the magnetic field can be quite different from that for the outer flux boundary resembling the taillike flux surface. RP CHENG, CZ (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,JAMES FORRESTAL CAMPUS,POB 451,PRINCETON,NJ 08544, USA. RI Cheng, Chio/K-1005-2014 NR 34 TC 40 Z9 41 U1 0 U2 5 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES JI J. Geophys. Res-Space Phys. PD FEB 1 PY 1992 VL 97 IS A2 BP 1497 EP 1510 DI 10.1029/91JA02433 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HB870 UT WOS:A1992HB87000037 ER PT J AU HAINFELD, JF FURUYA, FR AF HAINFELD, JF FURUYA, FR TI A 1.4-NM GOLD CLUSTER COVALENTLY ATTACHED TO ANTIBODIES IMPROVES IMMUNOLABELING SO JOURNAL OF HISTOCHEMISTRY & CYTOCHEMISTRY LA English DT Article DE GOLD; IMMUNOGOLD; GOLD CLUSTERS; IMMUNOGOLD-SILVER STAINING (IGSS); SILVER ENHANCEMENT; ELECTRON MICROSCOPY; IMMUNOBLOTS ID TRANSMISSION ELECTRON-MICROSCOPE; IMMUNOGOLD; RESOLUTION; ANTIGEN AB A large gold cluster (Au1.4nm) was covalently coupled to IgG and Fab' fragments. Its gold core is 1.4 nm in diameter and the Fab'-Au1.4nm immunoconjugate is the smallest gold immunoprobe that can be seen directly in the conventional electron microscope. It is useful in high-resolution immunolabeling, providing a resolution of 7.0 nm. The cluster's visibilitY can be enhanced with silver development for use in EM or light microscopy for histological purposes, or to detect less-than-or-equal-to 0.2 pg of antigen in immunoblots. By using a gold compound with covalent attachment, a number of advantages over colloidal gold probes are realized, including better resolution, stability, uniformity, sensitivity, and complete absence of aggregation; its small size should also improve penetration and more quantitative labeling of antigenic sites. RP HAINFELD, JF (reprint author), BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973, USA. FU NIGMS NIH HHS [GM31975] NR 21 TC 166 Z9 169 U1 1 U2 11 PU HISTOCHEMICAL SOC INC PI NEW YORK PA MT SINAI MEDICAL CENTER 19 EAST 98TH ST SUTIE 9G, NEW YORK, NY 10029 SN 0022-1554 J9 J HISTOCHEM CYTOCHEM JI J. Histochem. Cytochem. PD FEB PY 1992 VL 40 IS 2 BP 177 EP 184 PG 8 WC Cell Biology SC Cell Biology GA HG326 UT WOS:A1992HG32600002 PM 1552162 ER PT J AU LODWIG, SN UNKEFER, CJ AF LODWIG, SN UNKEFER, CJ TI STEREOSELECTIVE SYNTHESIS OF STABLE ISOTOPE LABELED L-ALPHA-AMINO ACIDS - SYNTHESIS OF L-[4-C-13] AND L-[3,4-(C-13)2]ASPARTIC ACID SO JOURNAL OF LABELLED COMPOUNDS & RADIOPHARMACEUTICALS LA English DT Article DE L-[4-C-13]ASPARTIC ACID; L-[3,4-C-13(2)]ASPARTIC ACID; AND L-[3-C-13]SERINE ID BETA-LACTONES; CONVERSION; SERINE AB We have developed a stereoselective route to isotopically labeled L-aspartic acid using L-serine as a chiral precursor. Labeled serine, prepared biosynthetically was N-protected by conversion to the N-t-Boc derivative. (N-t-Boc)-[3-C-13]Serine is cyclized to its beta-lactone which was treated with potassium [C-13]cyanide to yield L-beta-[3,4-C-13(2)]cyanoalanine. Hydrolysis of the cyanoalanine yielded L-[3,4-C-13(2)]aspartic acid. Similarly, L-[4-C-13]aspartate was produced from L-serine and K13CN. Using this route, the L-enantiomer was produced in 96% excess. C1 LOS ALAMOS NATL LAB,NATL STABLE ISOTOPES RESOURCE,GRP INC-4,MS C345,LOS ALAMOS,NM 87545. CENTRALIA COLL,DIV SCI,CENTRALIA,WA 98531. NR 8 TC 9 Z9 9 U1 0 U2 4 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0362-4803 J9 J LABELLED COMPD RAD JI J. Label. Compd. Radiopharm. PD FEB PY 1992 VL 31 IS 2 BP 95 EP 102 DI 10.1002/jlcr.2580310204 PG 8 WC Biochemical Research Methods; Chemistry, Medicinal; Chemistry, Analytical SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy; Chemistry GA HD165 UT WOS:A1992HD16500003 ER PT J AU VANAMERONGEN, H STRUVE, WS AF VANAMERONGEN, H STRUVE, WS TI DYNAMIC AND STRUCTURAL IMPLICATIONS OF POLARIZED FLUORESCENCE SPECTROSCOPY IN ORIENTED UNIAXIAL PHOTOSYNTHETIC ANTENNAE - APPLICATION TO C-PHYCOCYANIN FROM MASTIGOCLADUS-LAMINOSUS SO JOURNAL OF LUMINESCENCE LA English DT Article ID RESOLVED ENERGY-TRANSFER; CRYSTAL-STRUCTURE DATA; AGMENELLUM-QUADRUPLICATUM; BACTERIOCHLOROPHYLL-PROTEIN; EXCITATION TRANSPORT; MEMBRANE SYSTEMS; ORDER PARAMETERS; LIGHT; DEPOLARIZATION; RESOLUTION AB Isotropic and polarized time-resolved fluorescence spectroscopy of randomly oriented photosynthetic antennae can yield considerable information about their electronic excitation transport (EET) dynamics. However, the assignment of observed lifetime components to specific EET steps is often ambiguous, even when detailed theoretical predictions are available for the EET transition rates (e.g. in antennae with minimal exciton coupling). We demonstrate in this paper that more conclusive assignments can be made using time-dependent polarized fluorescence profiles in oriented samples of photosynthetic antennae, provided that the chromophore architecture in the chromoprotein exhibits a rotational axis of symmetry. This procedure is illustrated using the example of the extensively studied C-phycocyanin trimer from the blue-green photosynthetic bacterium Mastigocladus laminosus. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP VANAMERONGEN, H (reprint author), US DOE,AMES LAB,AMES,IA 50011, USA. RI van Amerongen, Herbert/J-9483-2016 OI van Amerongen, Herbert/0000-0002-9783-2895 NR 35 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-2313 J9 J LUMIN JI J. Lumines. PD FEB PY 1992 VL 51 IS 1-3 BP 29 EP 38 DI 10.1016/0022-2313(92)90016-3 PG 10 WC Optics SC Optics GA HL268 UT WOS:A1992HL26800005 ER PT J AU YANG, DP HINES, WA CLARK, WG MACHADO, FLA AZEVEDO, LA GIESSEN, BC QUAN, MX AF YANG, DP HINES, WA CLARK, WG MACHADO, FLA AZEVEDO, LA GIESSEN, BC QUAN, MX TI MAGNETIZATION STUDY OF THE I-AL80MN20 AND T-AL78MN22 QUASI-CRYSTALLINE PHASES SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article ID TEMPERATURE HEAT-CAPACITY; AL-MN QUASICRYSTALS; MAGNETISM; ALLOY AB The results of a magnetization study are reported for two phases of rapidly quenched Al-Mn which possess non-crystallographic rotational symmetry: icosahedral (I-phase) I-Al80Mn20 and decagonal (T-phase) T-Al78Mn22. The measurements were carried out over a temperature range from 1.7 to 300 K and for magnetic fields up to 50 kOe utilizing both VSM and SQUID magnetometry. The magnetic behavior of both phases is characterized by a small concentration of large moment "clusters" and spin-glass-like ordering. C1 UNIV CONNECTICUT,INST MAT SCI,STORRS,CT 06269. UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024. UNIV CALIF LOS ANGELES,CTR SOLID STATE SCI,LOS ANGELES,CA 90024. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NORTHEASTERN UNIV,BARNETT INST,BOSTON,MA 02115. RP YANG, DP (reprint author), UNIV CONNECTICUT,DEPT PHYS,STORRS,CT 06269, USA. RI Machado, Fernando/A-5443-2009; OI Machado, Fernando/0000-0002-6498-7751; Araujo, Fernando/0000-0001-6471-5564 NR 10 TC 7 Z9 7 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 109 IS 1 BP 1 EP 6 DI 10.1016/0304-8853(92)91022-L PG 6 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HG944 UT WOS:A1992HG94400001 ER PT J AU COOPER, BR SHENG, QG LIM, SP SANCHEZCASTRO, C KIOUSSIS, N WILLS, JM AF COOPER, BR SHENG, QG LIM, SP SANCHEZCASTRO, C KIOUSSIS, N WILLS, JM TI MOMENT WASHOUT AND THE ONSET TO THE HEAVY FERMION STATE SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT SYMP AT THE INTERNATIONAL CONF ON MAGNETISM : HEAVY FERMIONS CY SEP 02-06, 1991 CL EDINBURGH, SCOTLAND ID CERIUM MONOCHALCOGENIDES; MAGNETIC EXCITATIONS; SYSTEMS; ANISOTROPY; BAND AB Heavy fermion antiferromagnets are characterized by greatly reduced ordered moments and Neel temperatures (T(N)) relative to those in isostructural or other related materials showing well-ordered magnetic behavior. We have developed theory and ab initio computational technique allowing us to use the prediction of reduced ordered moment (and reduced T(N)) behavior as a diagnostic tool defining the approach to (or departure from) the correlated-electron heavy-fermion state with changing chemical environment in an isostructural series of compounds. Hybridization drives the system toward the heavy fermion state by merging the f-spectral density into the d-p band spectral density in the presence of interconfigurational correlation effects, thereby causing moment washout. Coulomb exchange counteracts this moment reduction; and the nonlinearity of the ordered moment response to the change in the hybridization/exchange balance with incremental f delocalization (associated with changing chemical environment) may provide an explanation for the circumstance that reduced magnetic ordering in the heavy fermion state seems to exhibit itself even more strongly in the ordered moment than in T(N). C1 CALIF STATE UNIV NORTHRIDGE,DEPT PHYS,NORTHRIDGE,CA 91330. UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORY,LOS ALAMOS,NM 87545. RP COOPER, BR (reprint author), W VIRGINIA UNIV,DEPT PHYS,MORGANTOWN,WV 26506, USA. NR 27 TC 30 Z9 30 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 108 IS 1-3 BP 10 EP 14 DI 10.1016/0304-8853(92)91332-N PG 5 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH329 UT WOS:A1992HH32900003 ER PT J AU HEFFNER, RH AF HEFFNER, RH TI MUON STUDIES OF HEAVY FERMIONS SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT SYMP AT THE INTERNATIONAL CONF ON MAGNETISM : HEAVY FERMIONS CY SEP 02-06, 1991 CL EDINBURGH, SCOTLAND ID PHASE-DIAGRAM; UNCONVENTIONAL SUPERCONDUCTORS; TEMPERATURE-DEPENDENCE; UPT3; U1-XTHXBE13; PENETRATION; (U,TH)BE13; SYSTEMS; STATES; ORDER AB Recent muon spin relaxation (mu-SR) studies have been particularly effective in revealing important properties of the unusual magnetism and superconductivity found in heavy fermion (HF) systems. In this paper mu-SR experiments elucidating the symmetry of the superconducting order parameter in UPt3 and UBe13 doped with thorium are reviewed. Also discussed is the correlation between the enhanced superconducting specific-heat jump and the reduced Kondo temperature in boron-doped UBe13, indicating possible direct experimental evidence for a magnetic pairing mechanism in HF superconductors. RP HEFFNER, RH (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,MS K764,LOS ALAMOS,NM 87545, USA. NR 30 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 108 IS 1-3 BP 23 EP 26 DI 10.1016/0304-8853(92)91335-Q PG 4 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH329 UT WOS:A1992HH32900006 ER PT J AU DEVISSER, A VANDIJK, NH FRANSE, JJM LACERDA, A FLOUQUET, J FISK, Z SMITH, JL AF DEVISSER, A VANDIJK, NH FRANSE, JJM LACERDA, A FLOUQUET, J FISK, Z SMITH, JL TI ABSENCE OF ANTIFERROMAGNETIC ORDER IN UBE13 SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT SYMP AT THE INTERNATIONAL CONF ON MAGNETISM : HEAVY FERMIONS CY SEP 02-06, 1991 CL EDINBURGH, SCOTLAND ID MAGNETIC ORDER; UPT3 AB The linear magnetostriction (lambda parallel-to and lambda perpendicular-to) of a single-crystalline sample of the heavy-fermion compound UBe13 has been measured for fields B < 8 T (B parallel-to [100]) in the temperature interval 0.3 < T < 12 K. We find neither evidence for the antiferromagnetic order (T(N) = 8.8 K) nor for the magnetostrictive oscillations, that were reported recently. Instead lambda-varies proportional to B2 as expected for a normal paramagnetic metal. C1 CTR RECH TRES BASSES TEMP,F-38042 GRENOBLE,FRANCE. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP DEVISSER, A (reprint author), UNIV AMSTERDAM,VAN DER WAALS ZEEMAN LAB,VALCKENIERSTR 65,1018 XE AMSTERDAM,NETHERLANDS. NR 8 TC 4 Z9 4 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 108 IS 1-3 BP 56 EP 58 DI 10.1016/0304-8853(92)91346-U PG 3 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH329 UT WOS:A1992HH32900017 ER PT J AU KNETSCH, EA MYDOSH, JA SIGNORE, PJC BROWN, SE MEISEL, MW HEFFNER, RH SMITH, JL AF KNETSCH, EA MYDOSH, JA SIGNORE, PJC BROWN, SE MEISEL, MW HEFFNER, RH SMITH, JL TI AC-SUSCEPTIBILITY AND PENETRATION DEPTH STUDIES OF U1-XTHXBE13 SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT SYMP AT THE INTERNATIONAL CONF ON MAGNETISM : HEAVY FERMIONS CY SEP 02-06, 1991 CL EDINBURGH, SCOTLAND ID DENSITY-WAVE INSTABILITY; PHASE-DIAGRAM; SUPERCONDUCTIVITY; (U,TH)BE13; UBE13 AB We have performed preliminary measurements of the magnetic-field penetration depth in the U1-xThxBe13 system on polycrystalline samples with x = 0.0066 and 0.0355 using ac-susceptibility and a tunnel-diode-oscillator technique. The x = 0.0066 sample shows a double peak in the dissipative component, chi", near T(c) and a linear temperature dependence of the inductive component, chi', below 160 mK. The measurements on the x = 0.0355 sample show no relevant features at 0.39 K, the temperature of the second phase transition, at both high and low frequencies. C1 UNIV FLORIDA,DEPT PHYS,GAINESVILLE,FL 32611. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP KNETSCH, EA (reprint author), LEIDEN UNIV,KAMERLINGH ONNES LAB,2300 RA LEIDEN,NETHERLANDS. NR 15 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 108 IS 1-3 BP 73 EP 74 DI 10.1016/0304-8853(92)91354-V PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH329 UT WOS:A1992HH32900025 ER PT J AU SCHENCK, A AMATO, A BIRRER, P GYGAX, FN HITTI, B LIPPELT, E BARTH, S OTT, HR FISK, Z AF SCHENCK, A AMATO, A BIRRER, P GYGAX, FN HITTI, B LIPPELT, E BARTH, S OTT, HR FISK, Z TI DISCOVERY OF NOVEL MAGNETIC FEATURES IN THE HEAVY-ELECTRON COMPOUND U2ZN17 SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT SYMP AT THE INTERNATIONAL CONF ON MAGNETISM : HEAVY FERMIONS CY SEP 02-06, 1991 CL EDINBURGH, SCOTLAND ID MU+SR AB Transverse field mu+ SR-measurements on a single crystal sample of U2Zn17 reveal a strikingly non uniform magnetic behavior. While part (approximately 30%) of the U-5f moments remain paramagnetic below T(N) = 9.7 K (at least for external fields greater-than-or-equal-to 0.2 T) another part (approximately 20%) enters into a complex order below 9.7 K which is associated with huge internal field spreads at the mu+ sites. Above T(N) this part causes an anisotropic mu+ Knight shift involving direction cosines up to 8th order. Only the remaining fraction is compatible with the simple AF order suggested by neutron diffraction studies. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. SWISS FED INST TECHNOL,FESTKORPERPHYS LAB,CH-8093 ZURICH,SWITZERLAND. RP SCHENCK, A (reprint author), ETH ZURICH,INST MITTELENERGIEPHYS,CH-5232 VILLIGEN,SWITZERLAND. RI Amato, Alex/H-7674-2013 OI Amato, Alex/0000-0001-9963-7498 NR 5 TC 5 Z9 5 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 108 IS 1-3 BP 97 EP 99 DI 10.1016/0304-8853(92)91365-Z PG 3 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH329 UT WOS:A1992HH32900036 ER PT J AU LAWRENCE, JM ARKO, AJ JOYCE, JJ CANFIELD, PC FISK, Z THOMPSON, JD BARTLETT, RJ AF LAWRENCE, JM ARKO, AJ JOYCE, JJ CANFIELD, PC FISK, Z THOMPSON, JD BARTLETT, RJ TI PHOTOEMISSION IN YBCU2SI2 - PROBLEMS WITH THE KONDO IMPURITY MODEL SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT SYMP AT THE INTERNATIONAL CONF ON MAGNETISM : HEAVY FERMIONS CY SEP 02-06, 1991 CL EDINBURGH, SCOTLAND ID VALENCE AB We report valence band photoemission results for YbCu2Si2. The 4f13(J = 7/2) final state peak, centered 60 meV below the Fermi level epsilon(F), lacks the temperature dependence and is broader than predicted for a Kondo resonance. Together with recent photoemission results for cerium compounds, these results raise serious doubts about the Kondo impurity explanation of heavy fermion photoemission. C1 UNIV CALIF IRVINE,DEPT PHYS,IRVINE,CA 92717. RP LAWRENCE, JM (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. RI Canfield, Paul/H-2698-2014 NR 7 TC 14 Z9 14 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 108 IS 1-3 BP 215 EP 216 DI 10.1016/0304-8853(92)91417-R PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH329 UT WOS:A1992HH32900088 ER PT J AU CANFIELD, PC THOMPSON, JD FISK, Z HUNDLEY, MF LACERDA, A AF CANFIELD, PC THOMPSON, JD FISK, Z HUNDLEY, MF LACERDA, A TI EFFECTS OF DOPING ON HYBRIDIZATION GAPPED MATERIALS SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT SYMP AT THE INTERNATIONAL CONF ON MAGNETISM : HEAVY FERMIONS CY SEP 02-06, 1991 CL EDINBURGH, SCOTLAND AB Doping studies are presented on three materials exhibiting hybridization gaps: Ce3Bi4Pt3, U3Sb4Pt3 and CeRhSb. In the case of trivalent La, Y, or Lu substituting for Ce or U, there is a suppression of the low temperature gap and an increase in the electronic specific heat, gamma. In the case of tetravalent Th substitutions for U there is no change in gamma and in the case of tetravalent Zr substitution for Ce in CeRhSb, there is an enhanced semiconductor-like behavior in the electrical resistance. These results are discussed in the light of a simple model of hybridization gapped systems. RP CANFIELD, PC (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. RI Canfield, Paul/H-2698-2014 NR 10 TC 17 Z9 17 U1 2 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 108 IS 1-3 BP 217 EP 219 DI 10.1016/0304-8853(92)91418-S PG 3 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH329 UT WOS:A1992HH32900089 ER PT J AU MALETTA, H ROBINSON, RA LAWSON, AC SECHOVSKY, V HAVELA, L JIRMAN, L DIVIS, M BRUCK, E DEBOER, FR ANDREEV, AV BUSCHOW, KHJ BURLET, P AF MALETTA, H ROBINSON, RA LAWSON, AC SECHOVSKY, V HAVELA, L JIRMAN, L DIVIS, M BRUCK, E DEBOER, FR ANDREEV, AV BUSCHOW, KHJ BURLET, P TI ON THE MAGNETIC-STRUCTURE OF UNIGA SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article ID UGANI AB UNiGa has been studied by powder neutron diffraction together with UNiAl0.6Ga0.4 and UNiAl. The collinear magnetic structure of UNiGa consists of U magnetic moments in the [001] direction coupled ferromagnetically within (001) sheets and antiferromagnetic stacking (+--++-) of the sheets along the c-axis. In the case of UNiAl0.6Ga0.4, a simple (+-+-) stacking is observed. The very complicated powder pattern of UNiAl prevents determination of the magnetic structure in this case and single-crystal studies are desired. C1 LOS ALAMOS NATL LAB, LANSCE, LOS ALAMOS, NM 87545 USA. CHARLES UNIV, DEPT MET PHYS, CS-12116 PRAGUE, CZECH REPUBLIC. UNIV AMSTERDAM, VAN DER WAALS ZEEMAN LAB, 1018 XE AMSTERDAM, NETHERLANDS. PHILIPS RES LABS, 5600 JA EINDHOVEN, NETHERLANDS. CEN, DRF, SPH MDN, F-38041 GRENOBLE, FRANCE. RP MALETTA, H (reprint author), FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, IFF, W-5170 JULICH 1, GERMANY. RI Andreev, Alexander/B-6057-2011; Bruck, Ekkes/E-3365-2014; Sechovsky, Vladimir/A-5256-2008; OI Sechovsky, Vladimir/0000-0003-1298-2120; Bruck, Ekkes/0000-0002-5063-3338; Divis, Martin/0000-0001-9425-0171 NR 7 TC 8 Z9 8 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 21 EP 22 DI 10.1016/0304-8853(92)90684-G PN 1 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH326 UT WOS:A1992HH32600010 ER PT J AU TORIKACHVILI, MS JARDIM, RF BECERRA, CC WESTPHAL, CH PADUAN, A LOPEZ, VM REBELSKY, L AF TORIKACHVILI, MS JARDIM, RF BECERRA, CC WESTPHAL, CH PADUAN, A LOPEZ, VM REBELSKY, L TI MAGNETIC-PROPERTIES OF UT2SI2 (T = NI, CU AND AU) COMPOUNDS SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article ID UNI2SI2; UCU2SI2 AB We have performed a study of the magnetic properties of UT2Si2 (T = Ni, Cu and Au) compounds by means of measurements of the temperature, T, dependence of the low-frequency ac magnetic susceptibility chi(ac) and electrical resistivity rho. The chi(ac) data clearly shows that (1) a magnetic first-order transition takes place near 97 K in UNi2Si2; (2) a weak magnetic anomaly near 104 K precedes the onset of a much stronger ferromagnetic transition at almost-equal-to 97 K in UCu2Si2; and (3) two magnetic transitions occur in UAu2Si2, one with onset at 44 K and the other with onset at 18 K. The rho versus T data reveals (1) a small drop near 104 K for UCu2Si2 followed by a faster decline with T below 100 K; and (2) the transition near 44 K does not affect the behavior of rho versus T, while the transition at 18 K is accompanied by a sharp increase in rho with decreasing T followed by a sharp depression below 18 K. C1 UNIV SAO PAULO, INST FIS, BR-05596 SAO PAULO, SP, BRAZIL. BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. RP TORIKACHVILI, MS (reprint author), SAN DIEGO STATE UNIV, DEPT PHYS, SAN DIEGO, CA 92182 USA. RI PaduanFilho, Armando/H-2443-2011; Jardim, Renato/J-8068-2014 OI Jardim, Renato/0000-0002-2000-0257 NR 6 TC 8 Z9 8 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 69 EP 70 DI 10.1016/0304-8853(92)90707-U PN 1 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH326 UT WOS:A1992HH32600033 ER PT J AU TAJIMA, K AKIMITSU, J AKIMITSU, M REBELSKY, L GRUBEL, G SHIRANE, G AF TAJIMA, K AKIMITSU, J AKIMITSU, M REBELSKY, L GRUBEL, G SHIRANE, G TI THE TIME EVOLUTION OF THE 1ST-ORDER MAGNETIC PHASE-TRANSITION IN DY-4-PERCENT-Y ALLOY SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article AB The first-order magnetic transition of spiral to ferromagnetic structure of Dy-4% Y alloy has been investigated by means of Synchrotron X-ray diffraction. The development of the ferromagnetic phase could be studied by X-ray diffraction measurement for the observation of the hexagonal to orthorhombic crystal distortion accompanying the first-order magnetic transition. Below T(c), the ferromagnetic and spiral phases coexist and the development of the ferromagnetic phase exhibits a time dependent behaviour and is proportional to log t except in the early stage of the phase transition. C1 AOYAMA GAKUIN UNIV, DEPT PHYS, TOKYO 157, JAPAN. SHIBAURA INST TECHNOL, OMIYA, SAITAMA 330, JAPAN. BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. RP TAJIMA, K (reprint author), KEIO UNIV, DEPT PHYS, YOKOHAMA, KANAGAWA 223, JAPAN. NR 6 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 177 EP 178 DI 10.1016/0304-8853(92)90754-C PN 1 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH326 UT WOS:A1992HH32600080 ER PT J AU DELMORAL, A SCHWEIZER, J ARNAUDAS, JI SALAMON, MB RITTER, C JOVEN, E GEHRING, PM ALGARABEL, PA CULLEN, J AF DELMORAL, A SCHWEIZER, J ARNAUDAS, JI SALAMON, MB RITTER, C JOVEN, E GEHRING, PM ALGARABEL, PA CULLEN, J TI FERROMAGNETIC, QUASIFERROMAGNETIC AND ANTIFERROMAGNETIC SPIN-GLASS ORDERS IN RANDOM ANISOTROPY CRYSTALLINE DYXY1-XAL2 COMPOUNDS SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article ID SUSCEPTIBILITY; MAGNETS AB The nature of the different kinds of magnetic order in the magnetic phase diagram (MPD) of the cubic DyxY1-xAl2 weak random magnetic anisotropy series is clarified. At the spin-glass side of the MPD the system is formed by ''antiferromagnetic spin-glass'' clusters, with random-sign pair correlations (congruent-to 25 angstrom size), with randomized net magnetic moments, but correlated over long distances (almost-equal-to 10(3) angstrom) (cluster-glass). At the quasiferromagnetic side, ferromagnetic-like Bragg peaks persist down to x = 0.40, but a first-order phase transition at x congruent-to 0.625 signals the borderline for existence of good ferromagnetic order. C1 CSIC, ZARAGOZA, SPAIN. UNIV SARAGOSSA, ICMA, ZARAGOZA, SPAIN. CEN, F-38041 GRENOBLE, FRANCE. UNIV ILLINOIS, DEPT PHYS, URBANA, IL 61801 USA. UNIV ILLINOIS, MRL, URBANA, IL 61801 USA. INST MAX VON LAUE PAUL LANGEVIN, F-38042 GRENOBLE, FRANCE. BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. USN, CTR SURFACE WEAP, SILVER SPRING, MD 20910 USA. RP DELMORAL, A (reprint author), UNIV SARAGOSSA, DFMC, MAGNETISM LAB, ZARAGOZA, SPAIN. RI Algarabel, Pedro/K-8583-2014; Arnaudas, Jose/B-4702-2008 OI Algarabel, Pedro/0000-0002-4698-3378; Arnaudas, Jose/0000-0002-2624-6004 NR 8 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 243 EP 245 DI 10.1016/0304-8853(92)90782-J PN 1 PG 3 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH326 UT WOS:A1992HH32600108 ER PT J AU EICHMANN, AR JILES, DC DEVINE, MK AF EICHMANN, AR JILES, DC DEVINE, MK TI INSITU DETERMINATION OF THE MAGNETIC-PROPERTIES OF SOFT MAGNETIC-MATERIALS USING AN AUTOMATED MAGNETIC MEASURING SYSTEM SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article AB An automated magnetic measuring system has been developed to measure the magnetic properties of soft magnetic materials. This has found wide applications in the indirect assessment of mechanical properties of materials. Previous investigations have shown that the magnetic properties of soft magnetic materials are dependent on the mechanical properties and microstructure of the material. The development of this instrument has made it possible to monitor the condition of materials on location via their magnetic properties. C1 IOWA STATE UNIV SCI & TECHNOL, CTR NDE, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT ELECT & COMP ENGN, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT MAT SCI & ENGN, AMES, IA 50011 USA. RP EICHMANN, AR (reprint author), IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. NR 3 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 375 EP 376 DI 10.1016/0304-8853(92)90840-K PN 1 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH326 UT WOS:A1992HH32600166 ER PT J AU DEVINE, MK JILES, DC HARIHARAN, S AF DEVINE, MK JILES, DC HARIHARAN, S TI EFFECTS OF CYCLIC STRESS ON THE MAGNETIC HYSTERESIS PARAMETERS OF POLYCRYSTALLINE IRON SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article ID FERROMAGNETIC HYSTERESIS; STEELS AB Experiments have been conducted to investigate the changes in the hysteresis curves that result from large strain amplitude (dl/l = 0.005 and 0.003) cyclic stresses. It was found that the remanence of the material increased sharply during the first few stress cycles but subsequently the increase in remanence was less pronounced. Coercivity was found to decrease rapidly in the initial stages for the same reason. This is known as fatigue softening. The magnitudes of the changes in the magnetic properties were dependent on both the strain amplitude and the number of stress cycles experienced. It appears that the effects of stress on magnetization consist of two components, one due to the applied stress and the other due to the cumulative effects of previous stress history. C1 IOWA STATE UNIV SCI & TECHNOL, DEPT MAT SCI & ENGN, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT ELECT ENGN, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, CTR NDE, AMES, IA 50011 USA. RP DEVINE, MK (reprint author), IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. RI Jiles, David/H-9548-2012 NR 8 TC 11 Z9 11 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 377 EP 378 DI 10.1016/0304-8853(92)90841-B PN 1 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH326 UT WOS:A1992HH32600167 ER PT J AU KAMINSKI, DA JILES, DC BINER, SB SABLIK, MJ AF KAMINSKI, DA JILES, DC BINER, SB SABLIK, MJ TI ANGULAR-DEPENDENCE OF THE MAGNETIC-PROPERTIES OF POLYCRYSTALLINE IRON UNDER THE ACTION OF UNIAXIAL-STRESS SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article AB In previous work we have shown that when the magnetic field is changed under constant uniaxial stress there is a stress contribution to the anisotropy which increases or decreases the permeability depending on the sign of the stress and its direction relative to the field axis. In this paper we will give results on the effects of stress on magnetic properties and discuss how the anisotropy model can be extended when the field and stress are not coaxial. This leads to a more general model in which the permeabilities along different directions change in different ways under the action of the stress. C1 SW RES INST, SAN ANTONIO, TX 78284 USA. RP KAMINSKI, DA (reprint author), IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. RI Jiles, David/H-9548-2012 NR 6 TC 13 Z9 13 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 382 EP 384 DI 10.1016/0304-8853(92)90843-D PN 1 PG 3 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH326 UT WOS:A1992HH32600169 ER PT J AU SIPAHI, LB JILES, DC AF SIPAHI, LB JILES, DC TI INVESTIGATION OF THE FREQUENCY-DEPENDENCE OF BARKHAUSEN EMISSIONS FOR MEASURING THE DEPTH DEPENDENCE OF MAGNETIC-PROPERTIES SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article ID METALLIC FERROMAGNETIC MATERIALS; DOMAIN-WALL DYNAMICS AB Discontinuous displacement of Bloch walls and discontinuous domain rotation are two of the mechanisms which contribute to Barkhausen emissions. Measurements of the pulse height spectra, frequency spectra and root mean square ac amplitude of the emissions have been used to investigate the depth dependence of magnetic properties. An ac exciting field was superimposed on a constant dc field and the Barkhausen emissions were analyzed at different dc field strengths. The depth of penetration of the ac field, and hence the depth of the Barkhausen emissions, is controlled by the skin depth. RP SIPAHI, LB (reprint author), IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. RI Jiles, David/H-9548-2012 NR 8 TC 8 Z9 8 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 385 EP 386 DI 10.1016/0304-8853(92)90844-E PN 1 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH326 UT WOS:A1992HH32600170 ER PT J AU OESTERREICHER, H SMITH, M TAYLOR, D AF OESTERREICHER, H SMITH, M TAYLOR, D TI MAGNETISM OF FE CLUSTERS IN YBA2(CU1-XFEX)3OY SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article ID THERMAL TREATMENTS; SUPERCONDUCTIVITY; TC AB Reducing atmosphere preparations (RP) of title compounds with subsequent reoxigenations produce more extended Fe clustering on Cu(1) sites and an increase of the relative occupations on Cu(2), by comparison with conventional oxygenating atmosphere preparations (OP). Within a microscopic model for RP we discuss their increased magnetic and superconducting transition temperatures, local Fe magnetic moments and valence states. Data from Mossbauer spectroscopy indicate a distinction of local coordinations between bulk and surface of clusters and a likely Fe clustering also on Cu(2). Superconducting pair breaking per random Fe on Cu(2) is shown to be one order of magnitude stronger than for Zn. Fe clustering has the potential to increase the flux pinning, and influence the mode of magnetic order. C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA. RP OESTERREICHER, H (reprint author), UNIV CALIF SAN DIEGO, DEPT CHEM, LA JOLLA, CA 92093 USA. NR 10 TC 10 Z9 10 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 497 EP 498 DI 10.1016/0304-8853(92)90894-T PN 1 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH326 UT WOS:A1992HH32600220 ER PT J AU AEPPLI, G FISK, Z HAYDEN, SM HUNDLEY, MF MOOK, H RYTZ, D AF AEPPLI, G FISK, Z HAYDEN, SM HUNDLEY, MF MOOK, H RYTZ, D TI THE MARGINAL FERMI-LIQUID HYPOTHESIS AND MAGNETIC FLUCTUATIONS IN LA195 BA005 CUO4 SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article AB We report inelastic neutron scattering measurements on a single crystal of La1.95Ba0.05CuO4. The magnetic correlation length does not change on warming to temperatures as high as 250 K. The magnetic response and its temperature dependence may be described by a temperature dependent local susceptibility of a form compatible with the marginal Fermi liquid hypothesis. In particular, we find a magnetic relaxation rate which varies as h-GAMMA approximately 0.5 k(B)T for the metallic regime of our sample. C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. UNIV BRISTOL, HH WILLS PHYS LAB, BRISTOL BS8 1TL, AVON, ENGLAND. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. SANDOZ LTD, CH-4002 BASEL, SWITZERLAND. RP AEPPLI, G (reprint author), AT&T BELL LABS, MURRAY HILL, NJ 07974 USA. RI Hayden, Stephen/F-4162-2011 OI Hayden, Stephen/0000-0002-3209-027X NR 6 TC 2 Z9 2 U1 1 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 507 EP 508 DI 10.1016/0304-8853(92)90899-Y PN 1 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH326 UT WOS:A1992HH32600225 ER PT J AU TOVAR, M OBRADORS, X PEREZ, F OSEROFF, SB CHATEIGNER, D BORDET, P CHENAVAS, J CANFIELD, PC FISK, Z AF TOVAR, M OBRADORS, X PEREZ, F OSEROFF, SB CHATEIGNER, D BORDET, P CHENAVAS, J CANFIELD, PC FISK, Z TI AC SUSCEPTIBILITY IN WEAK FERROMAGNETIC R2CUO4 CUPRATES SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article ID MAGNETIC-PROPERTIES AB We present ac susceptibility measurements for R2CuO4 with R = Gd, Tb, Dy, Ho, Er and Tm, in the temperature range from 4 to 300 K. The frequency dependence of the in-phase chi'(omega, T) and out-of-phase chi''(omega, T) is analyzed as a function of temperature. C1 CTR ATOM BARILOCHE, RA-8400 BARILOCHE, ARGENTINA. SAN DIEGO STATE UNIV, SAN DIEGO, CA 92182 USA. CNRS, CRISTALLOG LAB, F-38042 GRENOBLE, FRANCE. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA. RP TOVAR, M (reprint author), INST CIENCIA MAT, E-01893 BARCELONA, SPAIN. RI Chateigner, Daniel/A-7654-2008; Obradors, Xavier/A-8146-2012; Canfield, Paul/H-2698-2014 OI Chateigner, Daniel/0000-0001-7792-8702; NR 8 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 549 EP 550 DI 10.1016/0304-8853(92)90919-F PN 1 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH326 UT WOS:A1992HH32600245 ER PT J AU PAUL, DM FORGAN, EM CUBITT, R LEE, SL MOOK, HA TIMMINS, P AF PAUL, DM FORGAN, EM CUBITT, R LEE, SL MOOK, HA TIMMINS, P TI NEUTRON-SCATTERING FROM THE FLUX LATTICE IN HIGH-TEMPERATURE SUPERCONDUCTORS SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article AB Neutron scattering has been used to observe diffraction from the flux-line lattice in high temperature superconductors. This technique is particularly useful in such systems as it allows observations to be made over a wide range of temperature and magnetic field. Experiments on the systems K0.4Ba0.6BiO3 and YBa2Cu3O7-delta will be described with applied magnetic fields of up to 4 T and for temperatures from 2 K to T(c). C1 UNIV BIRMINGHAM, SUPERCONDUCT RES GRP, BIRMINGHAM B15 2TT, W MIDLANDS, ENGLAND. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. INST MAX VON LAUE PAUL LANGEVIN, F-38042 GRENOBLE, FRANCE. RP PAUL, DM (reprint author), UNIV WARWICK, DEPT PHYS, COVENTRY CV4 7AL, W MIDLANDS, ENGLAND. RI cubitt, robert/B-9408-2008; Lee, Stephen/G-9791-2016 OI Lee, Stephen/0000-0002-2020-3310 NR 5 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 591 EP 592 PN 1 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH326 UT WOS:A1992HH32600265 ER PT J AU WARREN, P PAUL, DM GIORGI, A BERNHOEFT, N AF WARREN, P PAUL, DM GIORGI, A BERNHOEFT, N TI SMALL-ANGLE NEUTRON-SCATTERING FROM TIBE1.5CU0.5 SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article ID TIBE2-XCUX AB Metals on the verge of and just in the weakly magnetic state offer a unique test ground for current theories of itinerant magnetism. TiBe1.5Cu0.5 becomes ferromagnetic below 27 K with a low temperature moment of 0.07-mu(B) per average atom. Using the temperature and wavevector dependence of small angle neutron scattering data we have investigated the spectrum of low energy spin dynamics both in the magnetically ordered and disordered phases. Over the experimentally accessible range the low wavevector excitations are characterised by damped spin waves which evolve continuously into overdamped diffusive modes above T(c). C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA. UNIV DURHAM, DURHAM DH1 3HP, ENGLAND. UNIV WARWICK, DEPT PHYS, COVENTRY CV4 7AL, W MIDLANDS, ENGLAND. NR 12 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 687 EP 688 DI 10.1016/0304-8853(92)90985-W PN 1 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH326 UT WOS:A1992HH32600311 ER PT J AU FERNANDEZBACA, JA HAGEN, ME NICKLOW, RM TSUNODA, Y HAYDEN, SM AF FERNANDEZBACA, JA HAGEN, ME NICKLOW, RM TSUNODA, Y HAYDEN, SM TI MAGNETIC EXCITATIONS IN THE ITINERANT ANTIFERROMAGNET MN90CU10 SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article AB We have performed a neutron scattering experiment in order to study the spin dynamics of the itinerant-electron-antiferromagnet Mn90Cu10 at room temperature. Strongly-damped spin waves of energies up to 68 meV have been observed. These excitations have been found to be consistent with a linear dispersion relation with a stiffness constant of about 251 meV angstrom and an energy gap of 7.5 meV. The spin-wave damping is consistent with theoretical calculations that predict a damping linear in the wavevector q. These results are consistent with recent measurements by Nicklow and Tsunoda, and qualitatively consistent with earlier measurements by Wiltshire and collaborators. C1 UNIV KEELE, KEELE ST5 5BG, STAFFS, ENGLAND. OSAKA UNIV, OSAKA, JAPAN. INST MAX VON LAUE PAUL LANGEVIN, F-38042 GRENOBLE, FRANCE. RP FERNANDEZBACA, JA (reprint author), OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. RI Hayden, Stephen/F-4162-2011; Fernandez-Baca, Jaime/C-3984-2014 OI Hayden, Stephen/0000-0002-3209-027X; Fernandez-Baca, Jaime/0000-0001-9080-5096 NR 4 TC 6 Z9 6 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 699 EP 700 DI 10.1016/0304-8853(92)90991-V PN 1 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH326 UT WOS:A1992HH32600317 ER PT J AU BOOTHROYD, AT PERRING, TG TAYLOR, AD PAUL, DM MOOK, HA AF BOOTHROYD, AT PERRING, TG TAYLOR, AD PAUL, DM MOOK, HA TI HIGH-ENERGY SPIN-WAVES IN IRON MEASURED BY NEUTRON-SCATTERING SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article ID MAGNETIC EXCITATIONS AB We present new results for the spin wave dispersion relation measured along the [zeta-zeta-0] direction in bcc iron (12% silicon) by time-of-flight, neutron inelastic scattering. The excitations were followed to the zone boundary, where they are spread over a range of energies around 300 meV. C1 UNIV OXFORD, CLARENDON LAB, OXFORD, ENGLAND. RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. RP BOOTHROYD, AT (reprint author), UNIV WARWICK, DEPT PHYS, COVENTRY CV4 7AL, W MIDLANDS, ENGLAND. NR 6 TC 11 Z9 11 U1 1 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 713 EP 714 DI 10.1016/0304-8853(92)90998-4 PN 1 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH326 UT WOS:A1992HH32600324 ER PT J AU BLACKMAN, JA TROHIDOU, KN COOKE, JF AF BLACKMAN, JA TROHIDOU, KN COOKE, JF TI HIGH-ENERGY SPIN-WAVES IN CUBIC AND HCP TRANSITION-METALS SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article ID NICKEL; IRON AB We report on some new calculations of the magnetic susceptibility of hcp cobalt. Both acoustic and optic spin waves are obtained over a limited range of wave vector transfer. The results are in broad agreement with the available experimental data. Comparison is made with earlier work on the cubic ferromagnets. C1 OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. NCSR DEMOKRITOS, GR-15310 ATHENS, GREECE. RP BLACKMAN, JA (reprint author), UNIV READING, DEPT PHYS, READING RG6 2AF, BERKS, ENGLAND. NR 10 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 721 EP 722 DI 10.1016/0304-8853(92)91001-A PN 1 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH326 UT WOS:A1992HH32600327 ER PT J AU VOLKEL, AR MERTENS, FG WYSIN, GM BISHOP, AR AF VOLKEL, AR MERTENS, FG WYSIN, GM BISHOP, AR TI VORTEX DYNAMICS IN THE CLASSICAL 2-DIMENSIONAL ANTIFERROMAGNETIC XY-MODEL SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON MAGNETISM CY SEP 02-06, 1991 CL EDINBURGH, SCOTLAND ID VORTICES; FERROMAGNET; TRANSITION; MAGNETS AB We investigate the dynamics of the two-dimensional antiferromagnetic Heisenberg model with easy-plane exchange symmetry by explicitly calculating the dynamic correlation functions S(alpha-alpha)(q, omega), alpha = x, y, z. In addition to the spin waves we find also topological excitations, namely vortices which cause a a Kosterlitz-Thouless phase transition at T(KT). Our main interest is focused on the free vortices just above T(KT) where we developed a phenomenology based on a dilute gas of noninteracting vortices. With this ansatz we find central peaks in S(alpha-alpha)(q, omega) which are at different positions in q-space depending on whether the static vortex structure or the deviations from it due to a finite velocity dominates the correlations. We compare these results with a combined Monte Carlo Molecular Dynamics simulation on a 100 x 100 square lattice. We find a good agreement between our theory and the simulations and we obtain from this comparison explicit values for the vortex correlation length and the vortex average velocity. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP VOLKEL, AR (reprint author), UNIV BAYREUTH,W-8580 BAYREUTH,GERMANY. RI Wysin, Gary/I-8162-2012 OI Wysin, Gary/0000-0001-8422-800X NR 14 TC 4 Z9 4 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 766 EP 768 DI 10.1016/0304-8853(92)90350-W PN 2 PG 3 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH327 UT WOS:A1992HH32700002 ER PT J AU RADHAKRISHNA, P CABLE, JW AF RADHAKRISHNA, P CABLE, JW TI MAGNETIC EXCITATIONS IN THE TRIANGULAR ANTIFERROMAGNET MN3SN SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON MAGNETISM CY SEP 02-06, 1991 CL EDINBURGH, SCOTLAND ID SPIN AB The intermetallic compound Mn3Sn has a triangular spin configuration below the Neel point at 420 K. Below 230 K, this triangular spin arrangement remains within each hexagonal layer, but the spins rotate about the c axis with a period of about 10c0. We have studied the magnetic excitations of this itinerant electron antiferromagnet along high-symmetry directions at temperatures above and below the helical phase transition T(h). At 295 K, the spin-wave dispersion is approximately linear in q along {100} and quadratic in q along the {1, 0, zeta} and {1, 1, zeta} directions. The spin-wave energies at 295 K can be described by (h-omega)2 = DELTA(2) + A2q2 and h-omega = DELTA + Bq2 where the anisotropy gap DELTA = 4.3 meV, A congruent-to 100 meV angstrom for {100}, A congruent-to 135 meV angstrom for {100}, and B = 130 meV angstrom 2 for {1, 0, zeta} and {1, 1, zeta}. Below T(h), the zone center shifts to the satellite positions of the helical structure, and the dispersion along {1, 0, zeta} becomes linear in q with h-omega congruent-to 95q [meV]. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP RADHAKRISHNA, P (reprint author), JAWAHARLAL NEHRU CTR ADV SCI RES,BANGALORE,INDIA. NR 5 TC 5 Z9 5 U1 4 U2 13 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 1065 EP 1066 DI 10.1016/0304-8853(92)90492-7 PN 2 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH327 UT WOS:A1992HH32700144 ER PT J AU BENNETT, LH MCMICHAEL, RD SWARTZENDRUBER, LJ SHULL, RD WATSON, RE AF BENNETT, LH MCMICHAEL, RD SWARTZENDRUBER, LJ SHULL, RD WATSON, RE TI MONTE-CARLO AND MEAN-FIELD CALCULATIONS OF THE MAGNETOCALORIC EFFECT OF FERROMAGNETICALLY INTERACTING CLUSTERS SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON MAGNETISM CY SEP 02-06, 1991 CL EDINBURGH, SCOTLAND ID MAGNETIC REFRIGERATION; ROOM-TEMPERATURE AB The magnetic entropy change of a ferromagnet induced by an application of a magnetic field is greatest in the temperature region near the Curie point, and the magnitude of the effect is expected to rise monotonically with the size of the individual moments which make up the material. We explore the case of nanocomposite materials with ferromagnetically interacting clusters having large cluster magnetic moments as a function of cluster size. As cluster size increases, both Monte Carlo and mean-field calculations show a decrease in the entropy change at T(c) for a given applied field and constant total magnetic moment, and an increase in the entropy change well above T(c). In addition, for the first time, we present a comparison of the results of mean-field and Monte Carlo calculations of the magnetocaloric effect in classical Heisenberg ferromagnets. Previous calculations of the magnetocaloric effect have taken the mean-field approach, which is known to underestimate the spontaneous magnetization below T(c). These issues are relevant to devices employing magnetic refrigeration. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. RP BENNETT, LH (reprint author), NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899, USA. RI C, Y/G-5456-2010; McMichael, Robert/J-8688-2012; Shull, Robert/F-5971-2013; OI McMichael, Robert/0000-0002-1372-664X NR 11 TC 41 Z9 42 U1 1 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 1094 EP 1095 DI 10.1016/0304-8853(92)90504-H PN 2 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH327 UT WOS:A1992HH32700156 ER PT J AU CHATTOPADHYAY, T GRUBEL, G AXE, JD GIBBS, D AF CHATTOPADHYAY, T GRUBEL, G AXE, JD GIBBS, D TI X-RAY RESONANCE MAGNETIC SCATTERING IN EUAS3 SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON MAGNETISM CY SEP 02-06, 1991 CL EDINBURGH, SCOTLAND ID EXCHANGE SCATTERING; NEUTRON-DIFFRACTION; PHASE; EU(AS1-XPX)3 AB The magnetic properties of EuAs3 have been investigated by X-ray magnetic scattering with synchrotron radiation. No magnetic scattering could be detected in EuAs3 when the energy of the X-rays was far away from the L absorption edges. Strong enhancement of the magnetic intensities has been observed at the L(II) and L(III) absorption edges, whereas no magnetic intensities could be detected at the L(I) absorption edge. The resonance enhancement at the L(III) absorption edge is stronger by a factor of about three compared to that at the L(II) absorption edge. The magnetic properties of EuAs3 determined previously by neutron scattering could be reproduced by resonance X-ray scattering. C1 INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE. BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP CHATTOPADHYAY, T (reprint author), CEN,85X,F-38041 GRENOBLE,FRANCE. NR 12 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 1213 EP 1215 DI 10.1016/0304-8853(92)90554-2 PN 2 PG 3 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH327 UT WOS:A1992HH32700206 ER PT J AU THOELKE, JB JILES, DC AF THOELKE, JB JILES, DC TI MODEL CALCULATION FOR DETERMINING LOCAL ENERGY MINIMA IN THE ORIENTATION OF MAGNETIC DOMAINS IN TERBIUM DYSPROSIUM IRON SINGLE-CRYSTALS SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article AB This paper reports on a method which has been developed to track the location of local energy minima in the orientation of magnetic domains in Tb-Dy-Fe under the action of changing magnetic field and applied stress. The model assumes an array on non-interacting domains. Each domain is initially oriented along one of the <111> axes and aligns with the local minimum energy at each magnetic field strength. The energy surface was calculated from the sum of the magnetocrystalline anisotropy, field and magnetostrictive energies. The evolution of the energy minima are followed by determining the maximum gradient in the energy surface using the appropriate gradient operator. RP IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. RI Jiles, David/H-9548-2012 NR 4 TC 17 Z9 17 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 EI 1873-4766 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 1453 EP 1454 DI 10.1016/0304-8853(92)90660-G PN 2 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH327 UT WOS:A1992HH32700312 ER PT J AU CHUNG, R WEBER, R JILES, DC AF CHUNG, R WEBER, R JILES, DC TI HIGHLY MAGNETOSTRICTIVE RARE-EARTH IRON INTERMETALLIC COMPOUND FOR A MAGNETOSTRICTIVE LASER DIODE MAGNETOMETER SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON MAGNETISM CY SEP 02-06, 1991 CL EDINBURGH, SCOTLAND AB This paper reports on the construction of a miniature transducer module based on the highly magnetostrictive material Terfenol-D. Its capability of ac field detection at frequencies from 1.5 to 50 kHz is examined. Asymmetric surface mode vibrations of the Terfenol were observed and their impact on the operation of a diode laser sensor is discussed. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT MAT SCI & ENGN,AMES,IA 50011. RP CHUNG, R (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT ELECT & COMP ENGN,AMES,IA 50011, USA. RI Jiles, David/H-9548-2012 NR 4 TC 2 Z9 2 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 1455 EP 1456 DI 10.1016/0304-8853(92)90661-7 PN 2 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH327 UT WOS:A1992HH32700313 ER PT J AU GIBBS, D AF GIBBS, D TI RESONANT X-RAY MAGNETIC SCATTERING IN HOLMIUM SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON MAGNETISM CY SEP 02-06, 1991 CL EDINBURGH, SCOTLAND ID EXCHANGE SCATTERING; DIFFRACTION; POLARIZATION; EDGES; GD AB We review the results of resonant X-ray magnetic scattering experiments on the rare earth metal holmium. When the incident X-ray energy is tuned near the L(III) absorption edge, large resonant enhancements of the magnetic scattering and resonant integer harmonics are observed. These results are analyzed within the theory of X-ray resonance exchange scattering assuming electric dipole (2p --> 5d) and quadrupole (2p --> 4f) transitions among atomic orbitals. RP GIBBS, D (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 34 TC 5 Z9 5 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 1489 EP 1495 DI 10.1016/0304-8853(92)91423-Q PN 3 PG 7 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH328 UT WOS:A1992HH32800003 ER PT J AU SODERLIND, P JOHANSSON, B ERIKSSON, O AF SODERLIND, P JOHANSSON, B ERIKSSON, O TI SPIN AND ORBITAL MAGNETISM IN FE-CO AND CO-NI ALLOYS SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON MAGNETISM CY SEP 02-06, 1991 CL EDINBURGH, SCOTLAND AB The spin and orbital moments have been calculated for the ferromagnetic alloys of iron, cobalt and nickel. The electronic structure calculations consider Hund's three rules and the Virtual Crystal Approximation (VCA) is used in the calculation of the alloys. The total magnetic moment which is dominated by the spin contribution is well accounted for already in theory that neglects spin-orbit coupling and orbital polarization. To obtain orbital moments in agreement with experiment it is necessary to include orbital polarization in addition to the spin-orbit interaction. C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. UNIV CALIF LOS ALAMOS SCI LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. RP SODERLIND, P (reprint author), UNIV UPPSALA,DEPT PHYS,BOX 530,S-75121 UPPSALA,SWEDEN. RI Eriksson, Olle/E-3265-2014 OI Eriksson, Olle/0000-0001-5111-1374 NR 13 TC 5 Z9 5 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 2037 EP 2039 DI 10.1016/0304-8853(92)91658-G PN 3 PG 3 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH328 UT WOS:A1992HH32800238 ER PT J AU HARMON, BN WANG, XW LINDGARD, PA AF HARMON, BN WANG, XW LINDGARD, PA TI CALCULATION OF THE RUDERMAN-KITTEL INTERACTION AND THE NUCLEAR MAGNETIC-ORDERING IN SILVER SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON MAGNETISM CY SEP 02-06, 1991 CL EDINBURGH, SCOTLAND ID NANOKELVIN TEMPERATURES; COPPER AB Using first-principles energy bands and wave functions we have calculated the Ruderman-Kittel interaction between the nuclear spins of I = 1/2 in silver. We find, similar to copper, that the interaction is dominated by a nearest neighbor interaction and decreases more rapidly with distance than expected for the free electron model, further the dipolar interaction is relatively small. This makes the ideal fcc antiferromagnetic silver system particularly interesting. The uniform susceptibility and the Curie temperature is calculated using correlation theory and found in agreement with experimental observations. The calculated transition temperature, T(N) is somewhat higher than the quoted experimental value of 560 pK. C1 FLORIDA INT UNIV,DEPT PHYS,MIAMI,FL 33199. RISO NATL LAB,DEPT PHYS,DK-4000 ROSKILDE,DENMARK. RP HARMON, BN (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,DEPT PHYS,AMES,IA 50011, USA. NR 15 TC 15 Z9 15 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD FEB PY 1992 VL 104 BP 2113 EP 2115 DI 10.1016/0304-8853(92)91691-L PN 3 PG 3 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HH328 UT WOS:A1992HH32800271 ER PT J AU WARNER, JK CHEETHAM, AK NORD, AG VONDREELE, RB YETHIRAJ, M AF WARNER, JK CHEETHAM, AK NORD, AG VONDREELE, RB YETHIRAJ, M TI MAGNETIC-STRUCTURE OF IRON(II) PHOSPHATE, SARCOPSIDE, FE3(PO4)2 SO JOURNAL OF MATERIALS CHEMISTRY LA English DT Article DE MAGNETISM; NEUTRON DIFFRACTION; POWDER DIFFRACTION; RIETVELD ANALYSIS; IRON(II) PHOSPHATE ID MOSSBAUER RESONANCE; CRYSTAL-STRUCTURE; PHASE AB Fe3(PO4)2, sarcopside displays unusual magnetic properties which have been investigated using time-of-flight powder neutron diffraction and magnetic susceptibility measurements. The structure contains chains of three edge-shared FeO6 octahedra with two inequivalent iron sites, the central M(1) site possessing a fairly regular symmetry and smaller volume compared with the two distorted M(2) sites of the terminal octahedra. In the absence of an applied field, the compound orders antiferromagnetically, with the M(2) sites in each chain having opposite spin directions along the [100] direction, leaving the central M(1) cation frustrated with no net spin. Under applied magnetic fields of < 0.7 T, two magnetic phase transitions are observed, a field-induced ferrimagnetic-antiferromagnetic transition at 38(1) K and an antiferromagnetic-paramagnetic transition at 44(1) K. At fields > 0.7 T, only the bicritical transition from ferrimagnetic to paramagnetic is observed at 44(1) K. C1 UNIV STOCKHOLM,ARRHENIUS LAB,DEPT STRUCT CHEM,S-10691 STOCKHOLM,SWEDEN. UNIV CALIF LOS ALAMOS SCI LAB,LANSCE,LOS ALAMOS,NM 87545. RP WARNER, JK (reprint author), UNIV OXFORD,CHEM CRYSTALLOG LAB,9 PARKS RD,OXFORD OX1 3PD,ENGLAND. NR 25 TC 26 Z9 26 U1 4 U2 19 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 0959-9428 J9 J MATER CHEM JI J. Mater. Chem. PD FEB PY 1992 VL 2 IS 2 BP 191 EP 196 DI 10.1039/jm9920200191 PG 6 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA HE729 UT WOS:A1992HE72900008 ER PT J AU JAIN, A CHI, KM HAMPDENSMITH, MJ KODAS, TT FARR, JD PAFFETT, MF AF JAIN, A CHI, KM HAMPDENSMITH, MJ KODAS, TT FARR, JD PAFFETT, MF TI CHEMICAL VAPOR-DEPOSITION OF COPPER VIA DISPROPORTIONATION OF HEXAFLUOROACETYLACETONATO(1,5-CYCLOOCTADIENE)COPPER(I), (HFAC)CU(1,5-COD) SO JOURNAL OF MATERIALS RESEARCH LA English DT Note ID FILMS AB Hot- and cold-wall chemical vapor deposition (CVD) using the volatile copper(I) compound (hfac)Cu(1,5-COD), where hfac = 1,1,1,5,5,5,-hexafluoroacetylacetonate and 1,5-COD = 1,5-cyclooctadiene, as a precursor was carried out in hot-wall and warm-wall, lamp-heated reactors using SiO2 substrates that had been patterned with Pt or W, over a temperature range 120-degrees-C-250-degrees-C. Deposition was observed onto Pt, W, and SiO2 over this temperature range at rates of up to 3750 angstrom/min to give copper films that contained no detectable impurities by Auger electron spectroscopy and gave resistivities of 1.9-5.7-mu-ohm cm. The volatile by-products formed during deposition were 1,5-COD and Cu(hfaC)2 and a mass balance was consistent with the quantitative disproportionation reaction: 2(hfac)Cu(1,5-COD) --> Cu + Cu(hfac)2 + 2(1,5-COD). The measured activation energy for this CVD reaction was 26(2) kcal/mol. The absence of selectivity for metal surfaces in the presence of SiO2 is in contrast to CVD results for the related compounds (beta-diketonate)Cu(PMe3) where beta-diketonate = hfac, 1,1,1-trifluoroacetylacetonate (tfac), and acetylacetonate (acac). C1 UNIV NEW MEXICO,DEPT CHEM,ALBUQUERQUE,NM 87131. UNIV NEW MEXICO,DEPT CHEM ENGN,ALBUQUERQUE,NM 87131. UNIV NEW MEXICO,CTR MICROENGINEERED CERAM,ALBUQUERQUE,NM 87131. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. NR 25 TC 59 Z9 59 U1 0 U2 2 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD FEB PY 1992 VL 7 IS 2 BP 261 EP 264 DI 10.1557/JMR.1992.0261 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA HC899 UT WOS:A1992HC89900002 ER PT J AU SELVADURAY, G ZHANG, C BALACHANDRAN, U GAO, Y MERKLE, KL SHI, H POEPPEL, RB AF SELVADURAY, G ZHANG, C BALACHANDRAN, U GAO, Y MERKLE, KL SHI, H POEPPEL, RB TI EFFECT OF CO2 ON THE PROCESSING OF Y-BA-CU-O SUPERCONDUCTORS SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID OXYGEN STOICHIOMETRY; YBA2CU3O7-X AB The superconducting properties of YBa2Cu3O6+x reacted with various known ratios of O2/CO2 gas mixtures during sintering at different temperatures were studied. J(c) was found to decrease drastically upon reaction with CO2, becoming zero at certain CO2 activities. The stability region for the 123 superconductor, as a function of CO2 activity and temperature, was empirically formulated as follows: log p(CO2) < (-45.000)/T + 33.4. The grain boundaries in sintered samples with J(c) = O were investigated with HRTEM in conjunction with EDS. Two distinct types of grain boundaries were observed. Approximately 10% of the grain boundaries were- wet by a thin layer of a second phase, deduced to be BaCuO2. The remaining boundaries were sharp grain boundaries. The grain structure near the sharp grain boundaries was tetragonal. These two types of grain boundaries are thought to be responsible for J(c) being zero. C1 ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,ARGONNE,IL 60439. RP SELVADURAY, G (reprint author), SAN JOSE STATE UNIV,DEPT MAT ENGN,SAN JOSE,CA 95192, USA. NR 13 TC 37 Z9 37 U1 0 U2 1 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD FEB PY 1992 VL 7 IS 2 BP 283 EP 291 DI 10.1557/JMR.1992.0283 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA HC899 UT WOS:A1992HC89900006 ER PT J AU BHUSHAN, B KELLOCK, AJ CHO, NH AGER, JW AF BHUSHAN, B KELLOCK, AJ CHO, NH AGER, JW TI CHARACTERIZATION OF CHEMICAL BONDING AND PHYSICAL CHARACTERISTICS OF DIAMOND-LIKE AMORPHOUS-CARBON AND DIAMOND FILMS SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID SPECTROSCOPY; RAMAN; OVERCOATS; COATINGS; SURFACE; MEDIA AB Diamond-like (amorphous) carbon (DLC) films were prepared by dc magnetron sputtering and plasma enhanced chemical vapor deposition (PECVD) and diamond films were prepared by microwave plasma enhanced chemical vapor deposition (MPECVD). For the first time, chemical and mechanical characterization of the films from each category are carried out systematically and a comparison of the chemical and physical properties is provided. We find that DLC coatings produced by PECVD are superior in microhardness and modulus of elasticity to those produced by sputtering. PECVD films contain a larger fraction of sp3-bonding than the sputtered hydrogenated carbon films. Chemical and physical properties of the diamond films appear to be close to those of bulk diamond. C1 IBM CORP,DIV RES,ALMADEN RES CTR,SAN JOSE,CA 95120. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT & CHEM SCI,BERKELEY,CA 94720. RP BHUSHAN, B (reprint author), OHIO STATE UNIV,DEPT MECH ENGN,COLUMBUS,OH 43210, USA. RI Bhushan, Bharat/A-9684-2013; OI Bhushan, Bharat/0000-0001-7161-6601; Ager, Joel/0000-0001-9334-9751 NR 28 TC 45 Z9 46 U1 0 U2 6 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD FEB PY 1992 VL 7 IS 2 BP 404 EP 410 DI 10.1557/JMR.1992.0404 PG 7 WC Materials Science, Multidisciplinary SC Materials Science GA HC899 UT WOS:A1992HC89900023 ER PT J AU ZHANG, JG EKLUND, PC HUA, ZL SALAMANCARIBA, LG WUTTIG, M SOLTANI, PK STORTI, GM AF ZHANG, JG EKLUND, PC HUA, ZL SALAMANCARIBA, LG WUTTIG, M SOLTANI, PK STORTI, GM TI PHOTOLUMINESCENCE AND OPTICAL-ABSORPTION IN CAS-EU2+-SM3+ THIN-FILMS SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID RARE-EARTH IONS; SULFIDE PHOSPHORS; EU2+ ION; CATHODOLUMINESCENCE; CAS; MGS AB The optical absorption and photoluminescence of Eu2+:Sm3+-doped CaS films have been investigated in this paper. The energy dependence of the refractive index and absorption coefficient of the film were obtained by analyzing transmission and reflection spectra of the thin film. The refractive index at low energies is very close to the bulk value for CaS (n = 2.03) and decreases with increasing energy in the range of 1.2 to 2.5 eV. The energy gap of CaS: EU2, : SM3+ thin films is found to be a direct gap with value E(g) = 4.48 eV. Photoluminescence studies on annealed CaS:Eu2+:Sm3+ thin films showed a broad band at approximately 1.92 eV identified with emission from EU2, ions, and a set of sharp lines corresponding to emission from Sm3+ ions. Most of the strong features presented in the room temperature spectra are found in good agreement with previous bulk studies of CaS:Eu2+ and CaS:Sm3+. The abnormal increase of the Sm3+ photoluminescence with increasing temperature is explained by the phonon-assisted energy transfer from Eu2+ ions to SM3+ ions. C1 UNIV KENTUCKY,DEPT PHYS & ASTRON,LEXINGTON,KY 40511. UNIV MARYLAND,DEPT MAT & NUCL ENGN,COLLEGE PK,MD 20742. QUANTEX CORP,ROCKVILLE,MD. RP ZHANG, JG (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. RI Salamanca-Riba, Lourdes/B-3785-2009 OI Salamanca-Riba, Lourdes/0000-0001-8155-6403 NR 22 TC 18 Z9 19 U1 0 U2 2 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD FEB PY 1992 VL 7 IS 2 BP 411 EP 417 DI 10.1557/JMR.1992.0411 PG 7 WC Materials Science, Multidisciplinary SC Materials Science GA HC899 UT WOS:A1992HC89900024 ER PT J AU PAGE, TF OLIVER, WC MCHARGUE, CJ AF PAGE, TF OLIVER, WC MCHARGUE, CJ TI THE DEFORMATION-BEHAVIOR OF CERAMIC CRYSTALS SUBJECTED TO VERY LOW LOAD (NANO)INDENTATIONS SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID HARDNESS INDENTATIONS; SILICON-CARBIDE; ANISOTROPY AB The ultra-low load indentation response of ceramic single crystal surfaces (Al2O3, SiC, Si) has been studied with a software-controlled hardness tester (Nanoindenter) operating in the load range 2-60 mN. In all cases. scanning and transmission electron microscopy have been used to characterize the deformation structures associated with these verv small-scale hardness impressions. Emphasis has been placed on correlating the deformation behavior observed for particular indentations with irregularities in recorded load-displacement curves. For carefully annealed sapphire, a threshold load (for a given indenter) was observed below which the only surface response was elastic flexure and beyond which dislocation loop nucleation occurred at, or near, the theoretical shear strength to create the indentation. This onset of plasticity was seen as a sudden displacement discontinuity in the load-displacement response. At higher loads, indentations appeared to be accommodated predominantly by dislocation activity, though microcracks were observed to form at contact loads of only tens of milliNewtons. Possible such cracks are the incipient slip-induced nuclei for the much larger, indentation-induced cracks usually apparent only on the surface at much higher loads and often used for estimating indentation toughness. By contrast, silicon did not show this behavior but exhibited unusually large amounts of depth recovery within indentations, resulting in a characteristic reverse thrust on the indenter during unloading. TEM studies of indentations in silicon revealed less evidence of obvious dislocation activity than in sapphire (particularly at the lowest loads used) but did show residual highly imperfect-and often amorphous-structures within the indentations, consistent with a densification transformation occurring at the very high hydrostatic stresses produced under the indenter. The reverse thrust is caused by the relaxation of densified material during unloading. Thus, it appears that the low-load hardness response of silicon is controlled by a pressure-sensitive phase transformation. Though SiC has been predicted to undergo a densification transformation similar to silicon, its load-displacement behavior was found to be similar to Al2O3 suggesting that, for these contact experiments at least, the critical resolved shear stress for dislocation nucleation is exceeded before the critical hydrostatic pressure for densification is reached. In all cases, residual, plastically formed indentations were measured to be smaller than the fully loaded indentation depths would suggest, confirming that a significant portion of the deformation is elastic surface flexure. However, there is some doubt as to whether silicon displays elastic-only deformation even at verv small penetration depths. The use of microstructural studies to complement nanoindentation experiments is shown to be a kev route not only to interpreting the recorded load-displacement responses, but also to examining the deformation mechanisms controlling the mechanical behavior of ceramics to surface contacts at these small spatial scales. C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RP PAGE, TF (reprint author), UNIV NEWCASTLE UPON TYNE,DEPT MECH MAT & MFG ENGN,DIV MAT,NEWCASTLE TYNE NE1 7RU,TYNE & WEAR,ENGLAND. NR 40 TC 391 Z9 396 U1 5 U2 87 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD FEB PY 1992 VL 7 IS 2 BP 450 EP 473 DI 10.1557/JMR.1992.0450 PG 24 WC Materials Science, Multidisciplinary SC Materials Science GA HC899 UT WOS:A1992HC89900030 ER PT J AU TAI, LW LESSING, PA AF TAI, LW LESSING, PA TI MODIFIED RESIN INTERMEDIATE PROCESSING OF PEROVSKITE POWDERS .1. OPTIMIZATION OF POLYMERIC PRECURSORS SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID TECHNOLOGY; CERAMICS; OXIDES AB The formation of a polyester between citric acid (CA) and ethylene glycol (EG) was found to be a decisive factor for the foaming of resin intermediates in a Pechini-type powder process. This process was modified by changing the organic mass ratio of CA/EG which results in ceramic powders with different morphologies. The most porous resin intermediate (with or without chelated cations) was prepared using a polymeric gel made of equimolar citric acid and ethylene glycol. It was also found that a premixing of organic components, prior to adding constituent nitrate solutions, makes the whole process more controllable. C1 EG&G IDAHO INC,IDAHO NATL ENGN LAB,CERAM SECT,IDAHO FALLS,ID 83415. RP TAI, LW (reprint author), UNIV MISSOURI,DEPT CERAM ENGN,ROLLA,MO 65401, USA. NR 20 TC 181 Z9 184 U1 1 U2 22 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD FEB PY 1992 VL 7 IS 2 BP 502 EP 510 DI 10.1557/JMR.1992.0502 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA HC899 UT WOS:A1992HC89900035 ER PT J AU TAI, LW LESSING, PA AF TAI, LW LESSING, PA TI MODIFIED RESIN INTERMEDIATE PROCESSING OF PEROVSKITE POWDERS .2. PROCESSING FOR FINE, NONAGGLOMERATED SR-DOPED LANTHANUM CHROMITE POWDERS SO JOURNAL OF MATERIALS RESEARCH LA English DT Article AB Nonagglomerated ceramic precursor for Sr-doped lanthanum chromite powder was prepared by a modified resin-intermediate process using equimolar citric acid, ethylene glycol, and metallic nitrates. Pure and well-crystallized submicron powders with a narrow particle-size distribution were calcined from an optimally pulverized resin at a temperature of 750-degrees-C for 2 h in flowing air. The material cost for organics used in the investigated process was considerably lower than the original Pechini process. C1 EG&G IDAHO INC,IDAHO NATL ENGN LAB,CERAM SECT,IDAHO FALLS,ID 83415. RP TAI, LW (reprint author), UNIV MISSOURI,DEPT CERAM ENGN,ROLLA,MO 65401, USA. NR 7 TC 67 Z9 69 U1 1 U2 11 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD FEB PY 1992 VL 7 IS 2 BP 511 EP 519 DI 10.1557/JMR.1992.0511 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA HC899 UT WOS:A1992HC89900036 ER PT J AU HARRINGA, JL COOK, BA BEAUDRY, BJ AF HARRINGA, JL COOK, BA BEAUDRY, BJ TI EFFECTS OF VIAL SHAPE ON THE RATE OF MECHANICAL ALLOYING IN SI80GE20 SO JOURNAL OF MATERIALS SCIENCE LA English DT Article AB The rate of mechanical alloying for doped Si80Ge20 alloys was studied using flat and concave ended hardened tool steel vials. Alloying was found to occur at significantly higher rates using a flat ended vial. It was also found by X-ray diffraction that the homogeneity of the alloy remained constant between 9 and 30 h for the flat ended vial and between 15 and 30 h for the round ended vial. RP HARRINGA, JL (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 6 TC 9 Z9 9 U1 1 U2 4 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD FEB 1 PY 1992 VL 27 IS 3 BP 801 EP 804 DI 10.1007/BF00554056 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA HD938 UT WOS:A1992HD93800038 ER PT J AU ROSEN, RS KASSNER, ME THIEHSEN, KE AF ROSEN, RS KASSNER, ME THIEHSEN, KE TI THE MECHANICAL-BEHAVIOR OF U-6NB ALLOY AND AISI-1045 AND AISI-1215 STEELS AT HIGH-STRAIN RATES SO JOURNAL OF MATERIALS SCIENCE LETTERS LA English DT Article ID TEMPERATURE; STRENGTH C1 OREGON STATE UNIV,DEPT MECH ENGN,CORVALLIS,OR 97331. RP ROSEN, RS (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DIV MAT,LIVERMORE,CA 94550, USA. NR 7 TC 2 Z9 3 U1 0 U2 3 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0261-8028 J9 J MATER SCI LETT JI J. Mater. Sci. Lett. PD FEB 1 PY 1992 VL 11 IS 3 BP 125 EP 128 DI 10.1007/BF00724665 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA HD937 UT WOS:A1992HD93700001 ER PT J AU LEWIS, HR LEACH, PGL BOUQUET, S FEIX, MR AF LEWIS, HR LEACH, PGL BOUQUET, S FEIX, MR TI REPRESENTATIONS OF ONE-DIMENSIONAL HAMILTONIANS IN TERMS OF THEIR INVARIANTS SO JOURNAL OF MATHEMATICAL PHYSICS LA English DT Article ID TIME-DEPENDENT POTENTIALS; HARMONIC-OSCILLATOR; RATIONAL FUNCTIONS; 1ST INTEGRALS; SYSTEMS; EQUATIONS; MOMENTUM; MOTION AB A general formalism for representing the Hamiltonian of a system with one degree of freedom in terms of its invariants is developed. Those Hamiltonians H(q,p,t) are derived for which any particular function I(q,p,t) is an invariant. For each of those Hamiltonians, a function canonically conjugate to I(q,p,t) is derived which is also an invariant of H(q,p,t). The formalism is also presented for the case in which I(q,p,t) is expressed as a function of two canonically conjugate functions. The formalism is illustrated by applying it to the case of a particle moving in a time-dependent potential. Some earlier results are recovered and an invariant is found for a new potential. Lines for further study are outlined that may be fruitful for finding more examples of integrable systems. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. UNIV WITWATERSRAND,CNLS,CAMS,JOHANNESBURG 2050,SOUTH AFRICA. CNRS,PHYS MATH MODELISAT & SIMULAT,F-45071 ORLEANS 2,FRANCE. NR 22 TC 21 Z9 21 U1 1 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0022-2488 J9 J MATH PHYS JI J. Math. Phys. PD FEB PY 1992 VL 33 IS 2 BP 591 EP 598 DI 10.1063/1.529794 PG 8 WC Physics, Mathematical SC Physics GA HA516 UT WOS:A1992HA51600018 ER PT J AU LEVY, HA OLINS, AL OLINS, DE AF LEVY, HA OLINS, AL OLINS, DE TI DISTRIBUTION OF PROJECTION ANGLES FOR SINGLE-AXIS-TILT ELECTRON-MICROSCOPE TOMOGRAPHY OF EXTENDED THIN PLANAR SPECIMENS SO JOURNAL OF MICROSCOPY-OXFORD LA English DT Note DE ELECTRON MICROSCOPE TOMOGRAPHY; 3-DIMENSIONAL RECONSTRUCTION; PROJECTIONS ON CONVEX SETS (POCS) ID RECONSTRUCTION AB An optimized distribution of tilt angles for tomography of specimens of non-circular cross-section is derived and tested with reconstructions of a phantom model. C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. RP LEVY, HA (reprint author), UNIV TENNESSEE,OAK RIDGE GRAD SCH BIOMED SCI,DIV CHEM,POB 2009,OAK RIDGE,TN 37831, USA. NR 6 TC 2 Z9 2 U1 0 U2 0 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0022-2720 J9 J MICROSC-OXFORD JI J. Microsc.-Oxf. PD FEB PY 1992 VL 165 BP 325 EP 330 PN 2 PG 6 WC Microscopy SC Microscopy GA HF150 UT WOS:A1992HF15000010 ER PT J AU HUGHES, RJ HOLZSCHEITER, MH AF HUGHES, RJ HOLZSCHEITER, MH TI TESTS OF THE WEAK EQUIVALENCE PRINCIPLE WITH TRAPPED ANTIMATTER SO JOURNAL OF MODERN OPTICS LA English DT Article ID MASS; ION; SPECTROSCOPY; ELECTRON; GRAVITY; PHYSICS AB Recent developments in the trapping of ions and neutral atoms suggest that significant improvements in the precision of spectroscopic measurements on such systems can be expected. The application of these techniques to trapped antiprotons, positrons and antihydrogen atoms opens up new possibilities for precision tests of the weak equivalence principle (WEP) for antimatter. It is shown that constraints on WEP for positrons and antiprotons may be imposed by comparison of electron and positron, or proton and antiproton cyclotron frequencies, or of transition frequencies in hydrogen and antihydrogen, at the same height in a gravitational potential. The constraints that may be inferred from the results of existing particle-antiparticle cyclotron frequency comparisons are derived, and the improvements which will be possible from future, higher precision experiments are analysed. RP HUGHES, RJ (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV PHYS,P-15,LOS ALAMOS,NM 87545, USA. NR 56 TC 22 Z9 22 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0950-0340 J9 J MOD OPTIC JI J. Mod. Opt. PD FEB PY 1992 VL 39 IS 2 BP 263 EP 278 DI 10.1080/09500349214550271 PG 16 WC Optics SC Optics GA HJ044 UT WOS:A1992HJ04400006 ER PT J AU CHOI, SUS CHO, YI KASZA, KE AF CHOI, SUS CHO, YI KASZA, KE TI DEGRADATION EFFECTS OF DILUTE POLYMER-SOLUTIONS ON TURBULENT FRICTION AND HEAT-TRANSFER BEHAVIOR SO JOURNAL OF NON-NEWTONIAN FLUID MECHANICS LA English DT Article DE DEGRADATION; DILUTE VISCOELASTIC FLUIDS; HEAT TRANSFER; PIPE FLOW; TURBULENT FLOW ID DRAG-REDUCING POLYMER; SHEAR DEGRADATION; REDUCTION; SYSTEMS; STABILITY AB Long-term degradation tests for dilute polymer solutions flowing turbulently in circular pipes were conducted in a closed recirculatory flow loop at room temperature. The polymeric additives used were Polyox WSR-301 and Separan AP-273 at 200 ppm wt. in deionized water. The degradation run for Separan was conducted for 730 h, which is considerably longer than any of the earlier degradation studies reported in the literature. The degradation run for Polyox was conducted for only 22 h because of the extreme sensitivity of Polyox to shear degradation. Effects of degradation on turbulent friction and heat transfer coefficients are presented. It was found that dilute Polyox solution cannot be used in recirculatory systems because it degraded completely in less than 24 h. However, dilute Separan solution did not degrade completely under a typical flow shear condition but maintained a plateau value of about 25% friction reduction after the initial rapid degradation period. The existence of a plateau for the dilute Separan solution is an important finding because it implies that this solution may be a good candidate for use in practical closed-loop thermal systems. C1 DREXEL UNIV,DEPT MECH ENGN & MECH,PHILADELPHIA,PA 19204. RP CHOI, SUS (reprint author), ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,ARGONNE,IL 60439, USA. NR 53 TC 15 Z9 15 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0377-0257 J9 J NON-NEWTON FLUID JI J. Non-Newton. Fluid Mech. PD FEB PY 1992 VL 41 IS 3 BP 289 EP 307 DI 10.1016/0377-0257(92)87003-T PG 19 WC Mechanics SC Mechanics GA HF766 UT WOS:A1992HF76600003 ER PT J AU HIESIGER, EM FOWLER, JS LOGAN, J BRODIE, JD MACGREGOR, RR CHRISTMAN, DR WOLF, AP AF HIESIGER, EM FOWLER, JS LOGAN, J BRODIE, JD MACGREGOR, RR CHRISTMAN, DR WOLF, AP TI IS [1-C-11]PUTRESCINE USEFUL AS A BRAIN-TUMOR MARKER SO JOURNAL OF NUCLEAR MEDICINE LA English DT Article ID ORNITHINE DECARBOXYLASE ACTIVITY; POSITRON EMISSION TOMOGRAPHY; ALPHA-DIFLUOROMETHYLORNITHINE; POLYAMINE METABOLISM; BARRIER BREAKDOWN; HUMAN GLIOMAS; COLD INJURY; CELL-CYCLE; PUTRESCINE; PET AB Our experience with C-11-putrescine underscores the difficulty of finding a selective brain tumor tracer, uniquely incorporated by neoplastic glia or metastatic cells within brain, but not by the proliferating, nontransformed cells which constitute a normal pathophysiological reaction to various disease processes. Thirty-three patients with 36 lesions were studied with C-11-putrescine to determine the specificity of labeled putrescine for tumor tissue. The uptake of C-11-putrescine was correlated with local cerebral glucose metabolic rate in various lesions, including different types of tumors, to assess the relationship between C-11-putrescine uptake and tumor biology. Carbon-11-putrescine uptake was similar in malignant tumor and benign, non-neoplastic lesions with blood-brain barrier breakdown, illustrating the lack of tumor specificity of this tracer. Carbon-11-putrescine was not well incorporated into poorly enhancing lesions, regardless of their pathology, emphasizing the requirement of a disrupted blood-brain barrier for C-11-putrescine uptake. The ratio of C-11 concentration within lesions, compared to that in a region of interest in the contralateral brain, weakly correlated with an analogous ratio for local cerebral glucose metabolic rate in various lesions. Physiological processes not unique to tumors are associated with polyamine active transport and metabolism and contribute to the lack of tumor specificity of C-11-putrescine. Carbon-11-putrescine appear to have less diagnostic utility than (FDG)-F-18 in brain tumors. The potential of C-11-putrescine for evaluating the effect of antineoplastic therapy and providing prognostic information on brain tumors remains to be investigated. C1 NYU,SCH MED,DEPT PSYCHIAT,NEW YORK,NY 10016. BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. RP HIESIGER, EM (reprint author), NYU,SCH MED,DEPT NEUROSURG,530 1ST AVE,NEW YORK,NY 10016, USA. FU NINDS NIH HHS [NS 15638] NR 40 TC 9 Z9 9 U1 0 U2 1 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD FEB PY 1992 VL 33 IS 2 BP 192 EP 199 PG 8 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA HB893 UT WOS:A1992HB89300005 PM 1732439 ER PT J AU LEVY, AV GOMEZMONT, F VOLKOW, ND CORONA, JF BRODIE, JD CANCRO, R AF LEVY, AV GOMEZMONT, F VOLKOW, ND CORONA, JF BRODIE, JD CANCRO, R TI SPATIAL LOW-FREQUENCY PATTERN-ANALYSIS IN POSITRON EMISSION TOMOGRAPHY - A STUDY BETWEEN NORMALS AND SCHIZOPHRENICS SO JOURNAL OF NUCLEAR MEDICINE LA English DT Article ID CEREBRAL METABOLIC RELATIONSHIPS; F-18 FLUORODEOXYGLUCOSE; ALZHEIMERS-DISEASE; GLUCOSE-METABOLISM; BRAIN-REGIONS; CORTEX; ORGANIZATION; HUNTINGTONS; ASYMMETRY; HUMANS AB Using the two-dimensional Fourier transform and the brain's centroidal principal axis, a method is developed for the analysis of PET metabolic brain images without the use of predefined anatomic regions of interest. We applied the method to images from a group of 11 normal and 12 medicated schizophrenics tested under resting conditions and under a visual task. A cortical/subcortical spatial pattern was found to be significant in two directions; anterior/posterior and chiasmatic (left-anterior/right-posterior). The best individual clinical classification (Jackknife classification) occurred under visual task at two axial brain levels: at the basal ganglia with correct classification rates of 91% and 84%, while the cerebellum had rates of 82% and 92%. These high classification rates were obtained using only the four coefficients of the lowest spatial frequency. These results point to the generalized brain dysfunction of regional glucose metabolism in chronic medicated schizophrenics both at rest and at a visual image-tracking task. C1 NYU,SCH MED,DEPT PSYCHIAT,NEW YORK,NY 10003. NATHAN S KLINE INST PSYCHIAT RES,ORANGEBURG,NY. INST MEXICANO PSIQUIATRIA,UNIDAD INFORMAT,MEXICO CITY,MEXICO. IBM MEXICO,CTR CIENT,MEXICO CITY,MEXICO. RP LEVY, AV (reprint author), BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973, USA. FU NIMH NIH HHS [MH44832]; NINDS NIH HHS [NS 15638] NR 48 TC 8 Z9 8 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD FEB PY 1992 VL 33 IS 2 BP 287 EP 295 PG 9 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA HB893 UT WOS:A1992HB89300029 PM 1732457 ER PT J AU MAUSNER, LF SRIVASTAVA, SC ATKINS, HL AF MAUSNER, LF SRIVASTAVA, SC ATKINS, HL TI ECONOMIC-ADVANTAGES OF XE-127 OVER XE-133 SO JOURNAL OF NUCLEAR MEDICINE LA English DT Letter C1 SUNY STONY BROOK,STONY BROOK,NY 11794. RP MAUSNER, LF (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD FEB PY 1992 VL 33 IS 2 BP 305 EP 306 PG 2 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA HB893 UT WOS:A1992HB89300032 PM 1571048 ER PT J AU SRIVASTAVA, SC STRAUB, RF AF SRIVASTAVA, SC STRAUB, RF TI EVALUATION OF HEPARIN AND ANTICOAGULANT CITRATE DEXTROSE IN THE PREPARATION OF TECHNETIUM-99M-RED BLOOD-CELLS WITH ULTRATAG RBC KIT - REPLY SO JOURNAL OF NUCLEAR MEDICINE LA English DT Letter ID TC-99M RP SRIVASTAVA, SC (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 11 TC 11 Z9 12 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD FEB PY 1992 VL 33 IS 2 BP 307 EP 308 PG 2 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA HB893 UT WOS:A1992HB89300034 ER PT J AU GLASSER, RD AF GLASSER, RD TI ENDURING MISCONCEPTIONS OF STRATEGIC STABILITY - THE ROLE OF NUCLEAR MISSILE-CARRYING SUBMARINES SO JOURNAL OF PEACE RESEARCH LA English DT Article ID WAR AB This article exposes many of the flawed assumptions about the submarine leg of the nuclear triad implicit in traditional strategic stability theory. It argues that the US strategic studies literature has put too much emphasis on traditional stability theory and that stability, whether defined traditionally or in modern terms, is more threatened by submarine-based nuclear weapons than is generally realized. The article notes that, although the possibility of a major nuclear surprise attack is becoming increasingly remote, insofar as there currently exist military incentives to launch such attacks it is due in large part to submarine-launched ballistic missiles (SLBMs) which facilitate command and control decapitation strikes and threaten to negate options such as Launch on Warning. It moreover suggests that SLBMs are the strategic weapons most likely to endanger efforts to prevent loss of control in crises because: (1) US SLBMs do not contain Permissive Action Links (PALs); (2) in contrast to ICBMs, SLBMs regularity come into direct and potentially violent contact with enemy military forces in peacetime and are significantly more likely to come under-direct attack in conventional war; and (3) SLBMs could make it particularly difficult for decision-makers to determine the source of a nuclear attack. The article concludes with several recommendations for enhancing strategic stability. RP GLASSER, RD (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,CTR NATL SECUR STUDIES,LOS ALAMOS,NM 87544, USA. NR 48 TC 0 Z9 0 U1 0 U2 1 PU SAGE PUBLICATIONS LTD PI LONDON PA 6 BONHILL STREET, LONDON, ENGLAND EC2A 4PU SN 0022-3433 J9 J PEACE RES JI J. Peace Res. PD FEB PY 1992 VL 29 IS 1 BP 23 EP 37 DI 10.1177/0022343392029001003 PG 15 WC International Relations; Political Science SC International Relations; Government & Law GA HC706 UT WOS:A1992HC70600003 ER PT J AU CROPPER, ML EVANS, WN BERARDI, SJ DUCLASOARES, MM PORTNEY, PR AF CROPPER, ML EVANS, WN BERARDI, SJ DUCLASOARES, MM PORTNEY, PR TI THE DETERMINANTS OF PESTICIDE REGULATION - A STATISTICAL-ANALYSIS OF EPA DECISION-MAKING SO JOURNAL OF POLITICAL ECONOMY LA English DT Article ID GOVERNMENT BUREAUCRACY; REVEALED PREFERENCES; RISK; PRIORITIES; MANAGEMENT; COMMISSION AB This paper examines the EPA's decision to cancel or continue the registrations of cancer-causing pesticides that went through the special review process between 1975 and 1989. Despite claims to the contrary, our analysis indicates that the EPA indeed balanced risks against benefits in regulating pesticides: Risks to human health or C1 RESOURCES FUTURE INC, WASHINGTON, DC 20036 USA. US DOE, WASHINGTON, DC USA. UNIV NOVA LISBOA, LISBON, PORTUGAL. RP CROPPER, ML (reprint author), UNIV MARYLAND, COLLEGE PK, MD 20742 USA. RI nipe, cef/A-4218-2010 NR 19 TC 105 Z9 105 U1 2 U2 13 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0022-3808 J9 J POLIT ECON JI J. Polit. Econ. PD FEB PY 1992 VL 100 IS 1 BP 175 EP 197 DI 10.1086/261812 PG 23 WC Economics SC Business & Economics GA HE746 UT WOS:A1992HE74600008 ER PT J AU SHIN, YW WIEDERMANN, AH AF SHIN, YW WIEDERMANN, AH TI A METHOD FOR SUPPRESSION OF PRESSURE PULSES IN FLUID-FILLED PIPING .1. THEORETICAL-ANALYSIS SO JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME LA English DT Article AB A simple, nondestructive method to suppress pressure pulses in fluid-filled piping is theoretically analyzed, and the result provides the basis needed for design and evaluation of a pressure-pulse suppression device based on the proposed theory. The method is based on forming of fluid jets in the event of a pressure surge, such that the pulse height and the energy of the pulse are reduced. The results for pressure pulses in the range of practical interest show that a substantial reduction in the pulse height can be attained, with accompanying reduction of the pulse remaining in the system. The analysis also reveals that a certain amount of trade-off exists in the design of the suppression device; a certain level of pulse energy remaining in the system must be accepted in order to keep the pulse height below a certain level, and vice versa. C1 IIT,RES INST,CHICAGO,IL 60616. RP SHIN, YW (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 7 TC 0 Z9 0 U1 0 U2 5 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0094-9930 J9 J PRESS VESS-T ASME JI J. Press. Vessel Technol.-Trans. ASME PD FEB PY 1992 VL 114 IS 1 BP 60 EP 65 DI 10.1115/1.2929013 PG 6 WC Engineering, Mechanical SC Engineering GA HP757 UT WOS:A1992HP75700010 ER PT J AU SHIN, YW BIELICK, EF WIEDERMANN, AH OCKERT, CE AF SHIN, YW BIELICK, EF WIEDERMANN, AH OCKERT, CE TI A METHOD FOR SUPPRESSION OF PRESSURE PULSE IN FLUID-FILLED PIPING .2. EXPERIMENTAL-VERIFICATION SO JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME LA English DT Article AB A simple, nondestructive method to suppress pressure pulses in fluid-filled piping was proposed and theoretically analyzed in the previous companion paper. In this paper, the proposed method is verified experimentally. The results of experiments performed for the range of parameters of practical importance indicated that the attenuation of pressure pulses was sufficiently large for practical applications and in accordance with the theoretical predictions. This paper describes the experimental setup and the test models of the proposed pulse suppression devices and discusses the experimental results. In particular, the measured attenuation factors (transmitted pressure/incident pressure) are presented and compared with the theoretical predictions. C1 IIT,RES INST,CHICAGO,IL 60616. US DOE,WASHINGTON,DC 20545. RP SHIN, YW (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 8 TC 0 Z9 0 U1 0 U2 4 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0094-9930 J9 J PRESS VESS-T ASME JI J. Press. Vessel Technol.-Trans. ASME PD FEB PY 1992 VL 114 IS 1 BP 66 EP 73 DI 10.1115/1.2929014 PG 8 WC Engineering, Mechanical SC Engineering GA HP757 UT WOS:A1992HP75700011 ER PT J AU ERNST, B DENN, MM PIERINI, P ROCHEFORT, WE AF ERNST, B DENN, MM PIERINI, P ROCHEFORT, WE TI RHEOLOGICAL PROPERTIES OF LIQUID-CRYSTALLINE SOLUTIONS OF CIS-POLY(PARA-PHENYLENEBENZOBISOXAZOLE) IN POLYPHOSPHORIC ACID (PBO PPA) SO JOURNAL OF RHEOLOGY LA English DT Article ID GEL POINT; POLYMERS; VISCOSITY; PHASE; PDMS AB Liquid crystalline solutions of cis-poly(p-phenylenebenzobisoxazole) in polyphosphoric acid (PBO/PPA) exhibit linear viscoelastic response to strains of 5% and satisfy time-temperature superposition. The rheological behavior is suggestive of a weak gel-like structure with a small breaking strain at low frequencies. The solutions are highly shear thinning over the entire range studied. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. DOW CHEM CO USA,WALNUT CREEK,CA 94598. NR 16 TC 9 Z9 9 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0148-6055 J9 J RHEOL JI J. Rheol. PD FEB PY 1992 VL 36 IS 2 BP 289 EP 302 DI 10.1122/1.550346 PG 14 WC Mechanics SC Mechanics GA HC585 UT WOS:A1992HC58500003 ER PT J AU WELLER, RE HOFFMAN, WE AF WELLER, RE HOFFMAN, WE TI RENAL-FUNCTION IN DOGS WITH LYMPHOSARCOMA AND ASSOCIATED HYPERCALCEMIA SO JOURNAL OF SMALL ANIMAL PRACTICE LA English DT Article ID CANINE LYMPHOSARCOMA; PARATHYROID-HORMONE; CALCIUM; EXCRETION; TRANSPORT; POLYURIA; ACID AB Renal function was investigated in 12 dogs with lymphosarcoma and accompanying hypercalcaemia. There was no age or breed predilection. Renal function was evaluated using the endogenous clearance of creatinine to estimate glomerular filtration rate and urinary and fractional excretion of endogenous substances. Standard serum biochemical determinations and urinalyses were also employed. Serum calcium concentrations were high (> 2.99 mmol/litre) in all dogs, while serum phosphorus concentrations approximated or were below those of normocalcaemic dogs in most cases. Hypercalcaemic nephropathy and impaired renal function were evident in all 12 dogs studied. Ten of the dogs (83 per cent) were isosthenuric, and 11 (92 per cent) were hypercalciuric. Endogenous creatinine clearance was reduced by more than 50 per cent in all dogs examined. Urinary and fractional excretions of calcium, phosphorus, sodium, chloride and potassium were increased over reference values. The observed alterations in renal function could be attributed to the direct effects of a high concentration of intrarenal calcium on renal tubular function and haemodynamics and to the presence of a renotropic factor that interacted specifically with the parathyroid hormone receptor in the kidney. C1 UNIV ILLINOIS, COLL VET MED, URBANA, IL 61801 USA. RP WELLER, RE (reprint author), PACIFIC NW LAB, DEPT BIOL & CHEM, RICHLAND, WA 99352 USA. NR 39 TC 8 Z9 8 U1 1 U2 1 PU BRITISH VETERINARY ASSOC PI LONDON PA 7 MANSFIELD ST, LONDON, ENGLAND W1M 0AT SN 0022-4510 J9 J SMALL ANIM PRACT JI J. Small Anim. Pract. PD FEB PY 1992 VL 33 IS 2 BP 61 EP 66 PG 6 WC Veterinary Sciences SC Veterinary Sciences GA HD853 UT WOS:A1992HD85300004 ER PT J AU CHERN, MY DISALVO, FJ PARISE, JB GOLDSTONE, JA AF CHERN, MY DISALVO, FJ PARISE, JB GOLDSTONE, JA TI THE STRUCTURAL DISTORTION OF THE ANTI-PEROVSKITE NITRIDE CA3ASN SO JOURNAL OF SOLID STATE CHEMISTRY LA English DT Article ID DIFFRACTION C1 CORNELL UNIV,DEPT CHEM,ITHACA,NY 14853. SUNY STONY BROOK,INST MINERAL PHYS,STONY BROOK,NY 11794. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. NR 14 TC 29 Z9 29 U1 2 U2 13 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0022-4596 J9 J SOLID STATE CHEM JI J. Solid State Chem. PD FEB PY 1992 VL 96 IS 2 BP 426 EP 435 DI 10.1016/S0022-4596(05)80277-4 PG 10 WC Chemistry, Inorganic & Nuclear; Chemistry, Physical SC Chemistry GA HD200 UT WOS:A1992HD20000018 ER PT J AU REILLY, KM AF REILLY, KM TI 60-HZ AC LOSSES IN AG-DOPED HIGH-TEMPERATURE SUPERCONDUCTORS SO JOURNAL OF SUPERCONDUCTIVITY LA English DT Article DE YBA2CU3O7(AG); SUPERCONDUCTIVITY; AC LOSSES AB 60-Hz ac losses P were measured at temperature 77 K for sintered powder (YBa2Cu3O7)1-xAgx samples as a function of applied magnetic field h. Rod-shaped samples were cut from pellets for x = 0 and 0.05. The losses were measured in a uniform ac magnetic field h applied parallel to the sample surface. Measurements were made in fields up to h = 1000 A/cm rms at temperature 4.2 K and up to h = 600 A/cm rms at temperature 77 K. The results may indicate an increase of the intergranular current density and are discussed in relation to the grain size. RP REILLY, KM (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973, USA. NR 6 TC 2 Z9 2 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0896-1107 J9 J SUPERCOND JI J. Supercond. PD FEB PY 1992 VL 5 IS 1 BP 25 EP 27 DI 10.1007/BF00617992 PG 3 WC Physics, Applied; Physics, Condensed Matter SC Physics GA HV971 UT WOS:A1992HV97100005 ER PT J AU BEYER, WA FAWCETT, LR HARTEN, LP SWARTZ, BK AF BEYER, WA FAWCETT, LR HARTEN, LP SWARTZ, BK TI THE VOLUME COMMON TO 2 CONGRUENT CIRCULAR-CYLINDERS SO JOURNAL OF SYMBOLIC COMPUTATION LA English DT Article C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV X,LOS ALAMOS,NM 87545. RP BEYER, WA (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV T,LOS ALAMOS,NM 87545, USA. NR 7 TC 1 Z9 1 U1 0 U2 0 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0747-7171 J9 J SYMB COMPUT JI J. Symb. Comput. PD FEB PY 1992 VL 13 IS 2 BP 221 EP 230 DI 10.1016/S0747-7171(08)80091-0 PG 10 WC Computer Science, Theory & Methods; Mathematics, Applied SC Computer Science; Mathematics GA HH497 UT WOS:A1992HH49700006 ER PT J AU DAVIS, ML CHOU, GP AF DAVIS, ML CHOU, GP TI EPAS APPROACH TO DEVELOPMENT OF LDR STANDARDS FOR CONTAMINATED SOIL AND DEBRIS SO JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION LA English DT Article AB The U.S. Environmental Protection Agency (EPA) will soon propose standards for Land Disposal Restrictions (LDRs) for contaminated soil and debris (CSD). The preliminary regulatory definitions for contaminated soil and for contaminated debris are presented. EPA's strategy for determining the applicability of the regulation and the development of Best Demonstrated Available Technologies (BDAT) are discussed. Examples of contaminated soil and debris standards are given. C1 US DOE,WASHINGTON,DC 20585. RP DAVIS, ML (reprint author), MICHIGAN STATE UNIV,COLL ENGN,A349 ENGN BLDG,E LANSING,MI 48824, USA. NR 5 TC 2 Z9 2 U1 0 U2 0 PU AIR & WASTE MANAGEMENT ASSOC PI PITTSBURGH PA PO BOX 2861, PITTSBURGH, PA 15230 SN 1047-3289 J9 J AIR WASTE MANAGE JI J. Air Waste Manage. Assoc. PD FEB PY 1992 VL 42 IS 2 BP 145 EP 151 PG 7 WC Engineering, Environmental; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA HE722 UT WOS:A1992HE72200003 ER PT J AU HAMEED, S DIGNON, J AF HAMEED, S DIGNON, J TI GLOBAL EMISSIONS OF NITROGEN AND SULFUR-OXIDES IN FOSSIL-FUEL COMBUSTION 1970-1986 SO JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION LA English DT Article AB Statistical models previously introduced by the authors for estimating emission rates from rates of fuel combustion have been utilized to obtain emissions of nitrogen and sulfur gases in fossil fuel combustion for every country in the world for every year from 1970 to 1986. Changes in the global emission rates of these gases are presented together with the trends over individual continents. Global emissions of NOx increased by nearly a third in this period, i.e., from 18 Mt N/year in 1970 to 24 Mt N/year in 1986. Emissions of SOx increased by approximately 18 percent, from 57 Mt S/year in 1970 to 67 Mt S/year in 1986. The geographical distribution of NOx and SOx emissions for 1986 are presented on a latitude-longitude grid suitable for use in three-dimensional simulations of atmospheric chemistry in general circulation models. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DIV ATMOSPHERIC & GEOPHYS SCI,LIVERMORE,CA 94550. RP HAMEED, S (reprint author), SUNY STONY BROOK,INST TERRESTRIAL & PLANETARY ATMOSPHERES,STONY BROOK,NY 11794, USA. NR 11 TC 56 Z9 57 U1 1 U2 1 PU AIR & WASTE MANAGEMENT ASSOC PI PITTSBURGH PA PO BOX 2861, PITTSBURGH, PA 15230 SN 1047-3289 J9 J AIR WASTE MANAGE JI J. Air Waste Manage. Assoc. PD FEB PY 1992 VL 42 IS 2 BP 159 EP 163 PG 5 WC Engineering, Environmental; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA HE722 UT WOS:A1992HE72200005 ER PT J AU JANNEY, MA CALHOUN, CL KIMREY, HD AF JANNEY, MA CALHOUN, CL KIMREY, HD TI MICROWAVE SINTERING OF SOLID OXIDE FUEL-CELL MATERIALS .1. ZIRCONIA-8 MOL-PERCENT YTTRIA SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article AB The successful microwave sintering of zirconia demonstrates the necessity to understand both the materials and electromagnetic field aspects of microwave processing. It was difficult to produce crack-free parts in the multimode microwave furnace employed in this investigation. Nonuniformities in the microwave field, and dielectric properties that increased rapidly with temperature, produced "hot spots" in the parts, which led to differential sintering and subsequent cracking. To produce crack-free sintered parts, an indirect heating method was developed that eliminated the severe differential heating. Using this indirect heating method, it was demonstrated that the sintering temperature of zirconia could be lowered from 1375-degrees to 1200-degrees-C by microwave processing and that the resulting grain size was finger. RP JANNEY, MA (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 13 TC 144 Z9 148 U1 3 U2 8 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD FEB PY 1992 VL 75 IS 2 BP 341 EP 346 DI 10.1111/j.1151-2916.1992.tb08184.x PG 6 WC Materials Science, Ceramics SC Materials Science GA HE103 UT WOS:A1992HE10300010 ER PT J AU BHATTACHARYA, AK PETROVIC, JJ DANFORTH, SC AF BHATTACHARYA, AK PETROVIC, JJ DANFORTH, SC TI INDENTATION METHOD FOR DETERMINING THE MACROSCOPIC FRACTURE ENERGY OF BRITTLE BIMATERIAL INTERFACES SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID STRESS INTENSITY FACTORS; BONDED ELASTIC LAYERS; MATRIX COMPOSITES; CRACKING; TOUGHNESS AB Based on the mechanics analysis of crack-interface interaction, a simple and direct micro-indentation technique has been developed to evaluate the fracture energy of a bimaterial interface. The technique, when applied to a pristine planar SiC-Si3N4 interface at various angles of attack, is shown to provide a reasonable estimate of the interfacial fracture resistance. The experimentally obtained fracture energy has been compared favorably with a proposed atomic model of bond breaking between SiC and Si3N4. C1 RUTGERS STATE UNIV,DEPT CERAM ENGN,PISCATAWAY,NJ 08855. RP BHATTACHARYA, AK (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545, USA. NR 21 TC 13 Z9 13 U1 0 U2 5 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD FEB PY 1992 VL 75 IS 2 BP 413 EP 417 DI 10.1111/j.1151-2916.1992.tb08195.x PG 5 WC Materials Science, Ceramics SC Materials Science GA HE103 UT WOS:A1992HE10300021 ER PT J AU GUZE, BH HOFFMAN, JM MAZZIOTTA, JC BAXTER, LR PHELPS, ME AF GUZE, BH HOFFMAN, JM MAZZIOTTA, JC BAXTER, LR PHELPS, ME TI POSITRON EMISSION TOMOGRAPHY AND FAMILIAL ALZHEIMERS-DISEASE - A PILOT-STUDY SO JOURNAL OF THE AMERICAN GERIATRICS SOCIETY LA English DT Article ID CEREBRAL METABOLISM; GLUCOSE-UTILIZATION; DEMENTIA; DIAGNOSIS AB Objective: Local cerebral metabolic rates for glucose were compared between patients with familial Alzheimer's disease (FAD), sporadic Alzheimer's Disease (SAD), and normal controls (NC) to determine if FAD is associated with a unique pattern of brain metabolism. Design: Case-control study matched to convenience sample of FAD. Methods: Subjects in the three diagnostic groups were scanned using fluorodeoxyglucose and the Positron Emission Tomographic (PET) technique. The criterion standard of a detailed clinical history and examination were compared to scan results. Setting: Patients in a university hospital. Subjects: Ambulatory controls and Alzheimer's patients, both sporadic (n = 8) and familial (n = 7). The two groups were similar in severity of cognitive dysfunction. Results: FAD and SAD patients did not significantly differ in terms of local cerebral metabolic rates for glucose. C1 UNIV CALIF LOS ANGELES,NUCL MED LAB DOE,LOS ANGELES,CA 90024. UNIV CALIF LOS ANGELES,DEPT PSYCHIAT & BIOBEHAV SCI,LOS ANGELES,CA 90024. UNIV CALIF LOS ANGELES,DEPT NEUROL,LOS ANGELES,CA 90024. DUKE UNIV,DEPT MED NEUROL,DURHAM,NC 27706. DUKE UNIV,DEPT RADIOL NUCL MED,DURHAM,NC 27706. RP GUZE, BH (reprint author), UNIV CALIF LOS ANGELES,DEPT RADIOL SCI,DIV NUCL MED,ROOM 27-384,760 WESTWOOD PLAZA,LOS ANGELES,CA 90024, USA. NR 25 TC 11 Z9 11 U1 1 U2 1 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0002-8614 J9 J AM GERIATR SOC JI J. Am. Geriatr. Soc. PD FEB PY 1992 VL 40 IS 2 BP 120 EP 123 PG 4 WC Geriatrics & Gerontology; Gerontology SC Geriatrics & Gerontology GA HC685 UT WOS:A1992HC68500003 PM 1740595 ER PT J AU CLARK, DL HUFFMAN, JC WATKIN, JG AF CLARK, DL HUFFMAN, JC WATKIN, JG TI THE 1ST STRUCTURALLY CHARACTERIZED HOMOLEPTIC THORIUM ALKOXIDE - X-RAY CRYSTAL-STRUCTURE OF [TH(OCH(PR-ISO)2)4]2, AND NMR EVIDENCE FOR A MONOMER DIMER EQUILIBRIUM SO JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS LA English DT Article ID HYDROGEN-DEUTERIUM EXCHANGE; BONDS; CHEMISTRY; DIALKOXIDES; COMPLEX AB The synthesis and X-ray crystal structure of the dimeric five-coordinate homoleptic thorium alkoxide [Th(OCHPr(i)2)4]2, the first X-ray structural characterisation of a homoleptic thorium alkoxide complex, are reported: H-1 NMR findings evidence an equilibrium between the dimer [Th(OCHPr(i)2)4]2 and its monomer [Th(OCHPr(i)2)4]. C1 INDIANA UNIV,CTR MOLEC STRUCT,BLOOMINGTON,IN 47405. RP CLARK, DL (reprint author), LOS ALAMOS NATL LAB,DIV ISOTOPE & NUCL CHEM,MAIL STOP G739,LOS ALAMOS,NM 87545, USA. RI Clark, David/A-9729-2011 NR 33 TC 19 Z9 19 U1 0 U2 3 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 0022-4936 J9 J CHEM SOC CHEM COMM JI J. Chem. Soc.-Chem. Commun. PD FEB 1 PY 1992 IS 3 BP 266 EP 268 DI 10.1039/c39920000266 PG 3 WC Chemistry, Multidisciplinary SC Chemistry GA HF674 UT WOS:A1992HF67400036 ER PT J AU COFFIELD, JE MAMANTOV, G ZINGG, SP SMITH, GP BUCHANAN, AC AF COFFIELD, JE MAMANTOV, G ZINGG, SP SMITH, GP BUCHANAN, AC TI REDUCTION OF AROMATIC-COMPOUNDS IN ORGANIC CHLOROALUMINATE MELTS .2. PERYLENE SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID CHLORIDE IONIC LIQUID; TEMPERATURE MOLTEN-SALT; 1-METHYL-3-ETHYLIMIDAZOLIUM CHLORIDE; ALUMINUM; COMPLEXES; ELECTROCHEMISTRY; MIXTURES AB The electroreduction of perylene in basic mixtures of AlCl3 and 1-ethyl-3-methyl-1H-imidazolium chloride (44.4 mol % AlCl3) as well as 1,2-dimethyl-3-propyl-1H-imidazolium chloride (47.4 mol % AlCl3) has been investigated by electrochemical, spectroscopic, and spectroelectrochemical techniques. The reduction of perylene proceeds through an ECEC process with the likely product being the aluminum chloride adduct of the dianion of perylene. In addition, a radical anion intermediate has been identified and its rate of decay measured. C1 OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831. RP COFFIELD, JE (reprint author), UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996, USA. NR 36 TC 3 Z9 3 U1 0 U2 2 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD FEB PY 1992 VL 139 IS 2 BP 355 EP 359 DI 10.1149/1.2069220 PG 5 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA HD012 UT WOS:A1992HD01200009 ER PT J AU BARDWELL, JA SPROULE, GI MACDOUGALL, B GRAHAM, MJ DAVENPORT, AJ ISAACS, HS AF BARDWELL, JA SPROULE, GI MACDOUGALL, B GRAHAM, MJ DAVENPORT, AJ ISAACS, HS TI INSITU XANES DETECTION OF CR(VI) IN THE PASSIVE FILM ON FE-26CR SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID CR AB The passive film on sputter deposited thin film Fe-26Cr electrodes has been examined using the technique of in situ x-ray absorption near edge spectroscopy (XANES). During the x-ray spectroscopic measurements, the sample was maintained under electrochemical control in the pH 8.4 borate buffer electrolyte. The appearance of the distinctive Cr(VI) XANES pre-edge peak can be correlated with the transpassive wave in cyclic voltammogram, and its disappearance with the corresponding reduction wave. The formation and reduction of Cr(VI) was reversible, and only small amounts were detected in the film. Cr(VI) in the passive film is not indefinitely stable, and it is completely absent after long periods of air exposure. C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. RP BARDWELL, JA (reprint author), NATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA K1A 0R9,ONTARIO,CANADA. RI Davenport, Alison/J-6089-2013; OI Davenport, Alison/0000-0003-0853-515X; Bardwell, Jennifer/0000-0002-1990-0741 NR 9 TC 39 Z9 40 U1 1 U2 4 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD FEB PY 1992 VL 139 IS 2 BP 371 EP 373 DI 10.1149/1.2069224 PG 3 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA HD012 UT WOS:A1992HD01200013 ER PT J AU HSIAO, YL VITT, JE JOHNSON, DC AF HSIAO, YL VITT, JE JOHNSON, DC TI ELECTROCATALYSIS OF ANODIC OXYGEN-TRANSFER REACTIONS - ACETATE-DOPED LEAD DIOXIDE ELECTRODES IN SULFURIC-ACID MEDIA SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article AB Oxidations of dimethyl sulfoxide, toluene, and p-xylene at pure PbO2-film electrodes were determined to be under extreme kinetic control with values of the apparent heterogeneous rate constant (k(app) << 1 x 10(-3) cm s-1. However, a significant increase in k(app) was observed at acetate-doped PbO2-film electrodes (OAc-PbO2) in 1M H2SO4. X-ray diffraction data indicated the OAc-PbO2 films retained the slightly distorted rutile structure of the beta-form of the pure PbO2. Catalysis of the anodic discharge of H2O to produce adsorbed hydroxyl radicals (OH(ads)) is concluded to account for the enhanced catalytic activity of the OAc-PbO2 films for the anodic oxygen transfer reactions in H2SO4. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. NR 13 TC 5 Z9 5 U1 1 U2 2 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD FEB PY 1992 VL 139 IS 2 BP 377 EP 380 DI 10.1149/1.2069226 PG 4 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA HD012 UT WOS:A1992HD01200015 ER PT J AU WINDISCH, CF BAER, DR JONES, RH ENGELHARD, MH AF WINDISCH, CF BAER, DR JONES, RH ENGELHARD, MH TI THE INFLUENCE OF PHOSPHORUS ON THE CORROSION OF IRON IN CALCIUM NITRATE SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID INTERGRANULAR STRESS-CORROSION; CRACKING; ALLOYS; SULFUR; NICKEL; SURFACES; OXIDES; CORE AB Intergranular stress corrosion cracking (IGSCC) of metallic alloys including iron is strongly influenced by the presence of grain boundary impurities such as phosphorus. In this study to determine how phosphorus affects the corrosion of iron, electrochemical polarization methods were used in conjunction with surface analyses employing ultrahigh vacuum transfer. Specifically, these methods were used to examine the corrosion of iron, iron/phosphorus alloys, and iron implanted with phosphorus in deaerated 55 weight percent Ca(NO3)2 solutions at 60-degrees-C. The presence of phosphorus in iron accelerated corrosion in both the active and passive regions, with the effect being more pronounced in the passive region. In the active region, the phosphorus was oxidized to phosphate which, in turn, appeared to assist the dissolution of the semiprotective Fe3O4. In the passive region, the phosphorus (when unoxidized) accelerated corrosion by some other mechanism. The FePO4 that formed in the passive region did not inhibit passivation but, rather, was incorporated in the passive film. The chemical transformations would appear to explain, at least partly, the high IGSCC rates observed for iron containing phosphorus segregated at grain boundaries. RP WINDISCH, CF (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. RI Engelhard, Mark/F-1317-2010; Baer, Donald/J-6191-2013 OI Baer, Donald/0000-0003-0875-5961 NR 23 TC 8 Z9 8 U1 0 U2 2 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD FEB PY 1992 VL 139 IS 2 BP 390 EP 398 DI 10.1149/1.2069229 PG 9 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA HD012 UT WOS:A1992HD01200018 ER PT J AU MAYER, ST MULLER, RH AF MAYER, ST MULLER, RH TI AN INSITU RAMAN-SPECTROSCOPY STUDY OF THE ANODIC-OXIDATION OF COPPER IN ALKALINE MEDIA SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID SODIUM-HYDROXIDE SOLUTION; ELECTRODES; BEHAVIOR; SILVER AB In situ Raman spectroscopy measurements were made during the anodic oxidation of copper in 1M and 6M KOH solutions. The formation of Cu2O occurs at potentials corresponding to the first anodic voltammetric peak (A1), and a porous layer of Cu(OH)2 composed of fine needle-like crystals is formed at the second voltammetric peak (A2). The compact underlayer of cuprous oxide is transformed to another species (presumably CuO) at potentials above 0 mV vs. Hg/HgO. At potentials near oxygen evolution, an unidentified trivalent species appears. The reduction of the oxide is shown to be strongly influenced by illumination. Under irradiation, the underlayer is first reduced to Cu2O at around 0 mV vs. Hg/HgO, followed by Cu(OH)2 reduction to copper, and finally Cu2O reduction to copper metal. Without intense illumination, the p-type semiconductive properties of the underlying Cu2O layer make it act as a Schottky barrier, causing the large degree of irreversibility found in this system. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT & CHEM SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. NR 30 TC 79 Z9 80 U1 0 U2 31 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD FEB PY 1992 VL 139 IS 2 BP 426 EP 434 DI 10.1149/1.2069234 PG 9 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA HD012 UT WOS:A1992HD01200023 ER PT J AU SALVADORI, MC BREWER, MA AGER, JW KRISHNAN, KM BROWN, IG AF SALVADORI, MC BREWER, MA AGER, JW KRISHNAN, KM BROWN, IG TI THE EFFECT OF A GRAPHITE HOLDER ON DIAMOND SYNTHESIS BY MICROWAVE PLASMA CHEMICAL VAPOR-DEPOSITION SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID GROWTH; FILMS AB A microwave plasma chemical vapor deposition system using a graphite retaining ring as the sample holder has been used for low pressure diamond synthesis. The hydrogen plasma in this system can etch material from the graphite surface. By conditioning the surface of the graphite ring, this process can be reversed, and material can then be deposited onto the graphite surface by the plasma, rather than being etched from it. The result of conditioning the graphite retaining ring was to cover the graphite with diamond, and hinder plasma etching of carbon from the retaining ring. The samples were characterized using Raman Spectroscopy and Scanning Electron Microscopy, and the surface of the retaining ring was also studied with Raman. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV ACCELERATOR & FUS RES,BERKELEY,CA 94720. RP SALVADORI, MC (reprint author), UNIV SAO PAULO,BR-20516 SAO PAULO,SP,BRAZIL. RI Salvadori, Maria Cecilia/A-9379-2013 NR 6 TC 18 Z9 18 U1 0 U2 1 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD FEB PY 1992 VL 139 IS 2 BP 558 EP 560 DI 10.1149/1.2069256 PG 3 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA HD012 UT WOS:A1992HD01200045 ER PT J AU WILSON, MS GOTTESFELD, S AF WILSON, MS GOTTESFELD, S TI HIGH-PERFORMANCE CATALYZED MEMBRANES OF ULTRA-LOW PT LOADINGS FOR POLYMER ELECTROLYTE FUEL-CELLS SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Letter AB Polymer electrolyte membranes are catalyzed by the direct application of thin film catalyst layers cast from solutions of suspended Pt/C catalyst and solubilized Nafion(R) ionomer. Both the ionomeric membrane and the solubilized ionomer are in the Na+ form during casting to enable higher curing temperatures, which results in more robust catalyst layers. In addition to simplifying the fabrication process, the direct application apparently provides enhanced bonding at the interface between the membrane and the catalyst layer. Consequently, the performances of fuel cells utilizing these catalyzed membranes with ultra-low platinum loadings are superior to those achieved with other approaches to polymer electrolyte membranes of low Pt loading. RP WILSON, MS (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,ELECTR RES GRP,LOS ALAMOS,NM 87545, USA. NR 8 TC 271 Z9 282 U1 8 U2 53 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD FEB PY 1992 VL 139 IS 2 BP L28 EP L30 DI 10.1149/1.2069277 PG 3 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA HD012 UT WOS:A1992HD01200005 ER PT J AU RATOWSKY, RP FLECK, JA FEIT, MD AF RATOWSKY, RP FLECK, JA FEIT, MD TI HELMHOLTZ BEAM PROPAGATION IN RIB WAVE-GUIDES AND COUPLERS BY ITERATIVE LANCZOS REDUCTION SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION LA English DT Article ID ARBITRARY INDEX PROFILES; WAVE-GUIDES AB The solution of the Helmholtz equation requires the application of an exponentiated square root operator to an initial field. This operation is greatly facilitated by the introduction of a representation in which the above-mentioned operator is diagonal. The Lanczos method permits this diagonalization to be performed in a low-dimensional space and the propagation to be carried out to arbitrary order. An iteration scheme to be carried out in conjunction with the Lanczos method is also described. This scheme permits, in principle, the bound mode of a monomode waveguide to be calculated to machine accuracy. Results for some well-known test examples of rib waveguides are presented. RP RATOWSKY, RP (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. RI Feit, Michael/A-4480-2009 NR 17 TC 43 Z9 43 U1 1 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0740-3232 J9 J OPT SOC AM A JI J. Opt. Soc. Am. A-Opt. Image Sci. Vis. PD FEB PY 1992 VL 9 IS 2 BP 265 EP 273 DI 10.1364/JOSAA.9.000265 PG 9 WC Optics SC Optics GA HA800 UT WOS:A1992HA80000009 ER PT J AU CHILDS, WJ AF CHILDS, WJ TI USE OF ATOMIC-BEAM LASER RADIOFREQUENCY DOUBLE-RESONANCE FOR INTERPRETATION OF COMPLEX SPECTRA - TB-I AS A TEST CASE SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID HYPERFINE-STRUCTURE; SPECTROSCOPY; CONFIGURATIONS AB The usefulness of the atomic-beam laser-rf double-resonance technique as an aid in the interpretation of complex optical spectra is investigated. A 2-angstrom-wide region (centered on 5441 angstrom) in the spectrum of Tb I is selected for the test. Some 25 atomic lines, many with severely overlapping hyperfine structure (hfs) patterns, had been observed in the region, and only a few of these had been successfully classified. The procedure followed for each line was to measure the hfs intervals of the lower level precisely and then to compare them with the known intervals of previously designated low levels. The procedure leads to a successful identification for only about half of the levels studied, owing principally to the small size of the ensemble of levels with known splittings. The method does have advantages, however, and is shown to be a useful supplement to conventional spectroscopic techniques. A number of new line classifications, level designations, and hfs intervals are reported. RP CHILDS, WJ (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 18 TC 7 Z9 7 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0740-3224 J9 J OPT SOC AM B JI J. Opt. Soc. Am. B-Opt. Phys. PD FEB PY 1992 VL 9 IS 2 BP 191 EP 196 DI 10.1364/JOSAB.9.000191 PG 6 WC Optics SC Optics GA HC606 UT WOS:A1992HC60600002 ER PT J AU ERLANDSON, AC ALBRECHT, GF STOKOWSKI, SE AF ERLANDSON, AC ALBRECHT, GF STOKOWSKI, SE TI MODEL PREDICTING THE TEMPERATURE-DEPENDENCE OF THE GAIN COEFFICIENT AND THE EXTRACTABLE STORED ENERGY DENSITY IN ND-PHOSPHATE GLASS LASERS SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID IONS AB We have constructed a model that will be useful in designing Nd: phosphate glass lasers that are heated when run repetitively, continuously, or in the burst mode. The model predicts the temperature dependence of the gain coefficient and the extractable stored energy density. Changes in the populations of the upper and lower laser levels are described by Boltzmann distributions. The generalized Einstein relations are used to relate the stimulated-emission and absorption cross sections. Variations of the cross sections with temperature have been inferred from measurements of the threshold energies of a flash-lamp-pumped rod oscillator, over the range 288 to 365 K. With only a single input of the gain coefficient at one temperature, our model predicts the gain coefficient and the extractable stored energy density at other temperatures. C1 TENCOR INSTRUMENTS,MT VIEW,CA 94043. RP ERLANDSON, AC (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,POB 5508,LIVERMORE,CA 94550, USA. NR 29 TC 13 Z9 15 U1 1 U2 3 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0740-3224 J9 J OPT SOC AM B JI J. Opt. Soc. Am. B-Opt. Phys. PD FEB PY 1992 VL 9 IS 2 BP 214 EP 222 DI 10.1364/JOSAB.9.000214 PG 9 WC Optics SC Optics GA HC606 UT WOS:A1992HC60600006 ER PT J AU WHITE, AF CHUMA, NJ GOFF, F AF WHITE, AF CHUMA, NJ GOFF, F TI MASS-TRANSFER CONSTRAINTS ON THE CHEMICAL EVOLUTION OF AN ACTIVE HYDROTHERMAL SYSTEM, VALLES-CALDERA, NEW-MEXICO SO JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH LA English DT Article ID BACA GEOTHERMAL SYSTEM; OXYGEN ISOTOPE; MINERAL EQUILIBRIA; JEMEZ MOUNTAINS; LA-PRIMAVERA; WATERS; RESERVOIR; FIELD; FLUIDS; ROCK AB Partial equilibrium conditions occur between fluids and secondary minerals in the Valles hydrothermal system, contained principally in the Tertiary rhyolitic Bandelier Tuff. The mass transfer processes are governed by reactive phase compositions, surface areas, water-rock ratios, reaction rates, and fluid residence times. Experimental dissolution of the vitric phase of the tuff was congruent with respect to Cl in the solid and produced reaction rates which obeyed a general Arrhenius release rate between 250 and 300-degrees-C. The O-18 differences between reacted and unreacted rock and fluids, and mass balances calculations involving Cl in the glass phase, produced comparable water-rock ratios of unity, confirming the importance of irreversible reaction of the vitric tuff. A fluid residence time of approximately 2 x 10(3) years, determined from fluid reservoir volume and discharge rates, is less than 0.2% of the total age of the hydrothermal system and denotes a geochemically and isotopically open system. Mass transfer calculations generally replicated observed reservoir pH, P(CO2), and P(O2) conditions, cation concentrations, and the secondary mineral assemblage between 250 and 300-degrees-C. The only extraneous component required to maintain observed calcite saturation and high P(CO2) pressures was carbon presumably derived from underlying Paleozoic limestones. Phase rule constraints indicate that Cl was the only incompatible aqueous component not controlled by mineral equilibrium. Concentrations of Cl in the reservoir directly reflect mass transport rates as evidenced by correlations between anomalously high Cl concentrations in the fluids and tuff in the Valles caldera relative to other hydrothermal systems in rhyolitic rocks. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP WHITE, AF (reprint author), US GEOL SURVEY,345 MIDDLEFIELD RD,MS 420,MENLO PK,CA 94025, USA. NR 72 TC 8 Z9 8 U1 2 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0377-0273 J9 J VOLCANOL GEOTH RES JI J. Volcanol. Geotherm. Res. PD FEB PY 1992 VL 49 IS 3-4 BP 233 EP 253 DI 10.1016/0377-0273(92)90016-7 PG 21 WC Geosciences, Multidisciplinary SC Geology GA HN504 UT WOS:A1992HN50400004 ER PT J AU TIPTON, RE STEINBERG, DJ TOMITA, Y AF TIPTON, RE STEINBERG, DJ TOMITA, Y TI BUBBLE EXPANSION AND COLLAPSE NEAR A RIGID WALL SO JSME INTERNATIONAL JOURNAL SERIES II-FLUIDS ENGINEERING HEAT TRANSFER POWER COMBUSTION THERMOPHYSICAL PROPERTIES LA English DT Article DE BUBBLES; BUBBLE COLLAPSE; RIGID WALL SOLID BOUNDARY; NUMERICAL SIMULATIONS; COMPRESSIBLE HYDRODYNAMICS; ARBITRARY LAGRANGIAN-EULERIAN HYDRODYNAMICS ID PRESSURE GENERATION; IMPULSIVE PRESSURE; SOLID BOUNDARY AB A series of experiments was performed that covered the entire range of expansion and collapse of an underwater bubble in the vicinity of a rigid wall. These experiments have been successfully simulated using a new arbitrary Lagrangian Eulerian hydrodynamic computer program which can run numerical simulations of practical bubble problems in 10 to 20 minutes of CPU time on a CRAY-YMP at an overall rate of 80 MFLOPS. C1 HOKKAIDO UNIV, HAKODATE 040, JAPAN. RP UNIV CALIF LAWRENCE LIVERMORE NATL LAB, POB 808 L-035, LIVERMORE, CA 94551 USA. NR 18 TC 11 Z9 11 U1 0 U2 3 PU JAPAN SOC MECHANICAL ENGINEERS PI TOKYO PA SHINANOMACHI-RENGAKAN BLDG., SHINANOMACHI 35, SHINJUKU-KU, TOKYO, 160-0016, JAPAN SN 0914-8817 J9 JSME INT J II-FLUID PD FEB PY 1992 VL 35 IS 1 BP 67 EP 75 PG 9 WC Engineering, Mechanical SC Engineering GA HN324 UT WOS:A1992HN32400010 ER PT J AU YEE, GG FULTON, JL SMITH, RD AF YEE, GG FULTON, JL SMITH, RD TI AGGREGATION OF POLYETHYLENE-GLYCOL DODECYL ETHERS IN SUPERCRITICAL CARBON-DIOXIDE AND ETHANE SO LANGMUIR LA English DT Article ID NON-IONIC SURFACTANTS; MICROEMULSION PHASES; REVERSE MICELLES; LIGHT-SCATTERING; NONIONIC SURFACTANTS; FLUIDS; SOLVENTS; BEHAVIOR; AMPHIPHILES; ASSEMBLIES AB Fourier transform infrared spectroscopy has been used to measure the degree of intermolecular hydrogen bonding between solute molecules of dodecanol-d, triethylene glycol dodecyl ether (C12EO3-d), or octaethylene glycol dodecyl ether (C12EO8-d) in supercritical carbon dioxide, supercritical ethane, and liquid heptane. Both supercritical and subcritical binary solutions containing up to 0.04 mole fraction amphiphile were examined under conditions ranging from 200 to 400 bar and 40-degrees-C. An equilibrium is established in these fluids between the "free" non-hydrogen-bonded monomer and various hydrogen-bonded species. The amphiphile concentration significantly affects the equilibrium distribution of the monomer and oligomeric species. Aggregation numbers of these three different amphiphiles in carbon dioxide are in the range of 2.5-5.0 molecules per aggregate. The aggregate size in CO2 is, within experimental error, the same as found for supercritical ethane and liquid n-heptane. These solvation studies provide a basis for more complete thermodynamic treatments of these systems. C1 PACIFIC NW LAB, DEPT CHEM SCI, CHEM METHODS & SEPARAT GRP, RICHLAND, WA 99352 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 35 TC 47 Z9 47 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD FEB PY 1992 VL 8 IS 2 BP 377 EP 384 DI 10.1021/la00038a010 PG 8 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA HG566 UT WOS:A1992HG56600010 ER PT J AU FU, SS SOMORJAI, GA AF FU, SS SOMORJAI, GA TI A COMPARATIVE-STUDY OF ZNOX OVERLAYERS ON CU(311), CU(110), AND A HIGH DEFECT CONCENTRATION CU(111) SO LANGMUIR LA English DT Article ID ADSORPTION; SURFACES; OXYGEN; OXIDATION AB Zinc and oxygen were deposited in ultrahigh vacuum to form ZnOx overlayers on three different copper faces, Cu(311), Cu(110), and a high defect concentration Cu(111). Up to 1.0 monolayer of ZnOx overlayers were examined. No long-range order was found for ZnOx overlayers on any of these surfaces. We used a combination of CO and CO2 temperature programmed desorption (TPD), Auger electron spectroscopy (AES), and low-energy electron diffraction (LEED) to follow chemical and structural changes of ZnOx overlayers on copper. Upon heating above 300 K, ZnOx area decreases while copper area increases, indicating clustering of ZnOx. In addition to changes in ZnOx overlayers on copper surfaces, we examined the decomposition of ZnOx to form Zn(g) and O(surface) by a combination of TPD, AES, and LEED. The desorption temperature of zinc vapor from the decomposition of ZnOx depends on the structure of the copper substrate. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. NR 16 TC 14 Z9 14 U1 0 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0743-7463 J9 LANGMUIR JI Langmuir PD FEB PY 1992 VL 8 IS 2 BP 518 EP 524 DI 10.1021/la00038a035 PG 7 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA HG566 UT WOS:A1992HG56600035 ER PT J AU GELLMAN, AJ DUNPHY, JC SALMERON, M AF GELLMAN, AJ DUNPHY, JC SALMERON, M TI IMAGING OF ACETYLENE HETEROCYCLIZATION SITES ON THE SULFIDED PD(111) SURFACE SO LANGMUIR LA English DT Article ID ADSORPTION; PALLADIUM; SULFUR AB Scanning tunneling microscopy (STM) has been used to identify defects as heterocyclization reaction sites on a sulfided Pd(111) surface. The heterocyclization of acetylene (C2H2) to thiophene (C4H4S) occurs on sulfided Pd(111) surfaces that have been activated by heating to temperatures above 800 K. We have imaged the atomic scale structure of the surface before activation and found a sulfur overlayer with atoms arranged in broad, defect-free terraces having (square-root 7 x square-root 7)R19-degrees periodicity with respect to the substrate. Images of the surface after heating indicate that this activation process irreversibly generates monatomic height steps with a concentration that increases with annealing temperature. We have been able to show that the active sites for acetylene heterocyclization are associated with the steps by correlating the step density with the thiophene yield. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV MAT SCI,BERKELEY,CA 94720. RP GELLMAN, AJ (reprint author), UNIV ILLINOIS,DEPT CHEM,URBANA,IL 61801, USA. RI Gellman, Andrew/M-2487-2014 OI Gellman, Andrew/0000-0001-6618-7427 NR 19 TC 15 Z9 15 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0743-7463 J9 LANGMUIR JI Langmuir PD FEB PY 1992 VL 8 IS 2 BP 534 EP 538 DI 10.1021/la00038a037 PG 5 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA HG566 UT WOS:A1992HG56600037 ER PT J AU SHARMA, VK JOHNSSON, M SALLIS, JD NANCOLLAS, GH AF SHARMA, VK JOHNSSON, M SALLIS, JD NANCOLLAS, GH TI INFLUENCE OF CITRATE AND PHOSPHOCITRATE ON THE CRYSTALLIZATION OF OCTACALCIUM PHOSPHATE SO LANGMUIR LA English DT Article ID SOLUTION-MEDIATED TRANSFORMATION; CRYSTAL-GROWTH; HYDROXYAPATITE FORMATION; CALCIUM-PHOSPHATE; KINETICS; APATITE; OCP AB The crystallization of octacalcium phosphate (OCP) in the presence of citrate and phosphocitrate ions has been studied using a constant composition method. The adsorption of these ions and their influence on the particle size distribution and zeta-potentials of OCP crystals were also investigated. Although citrate and phosphocitrate showed similar adsorption affinities, the OCP crystal growth inhibition of phosphocitrate was considerably more pronounced. When OCP surfaces were exposed to both citrate and phosphocitrate, the uptake of the latter was markedly increased in the range of citrate concentration, (1.6-10.0) x 10(-4) mol L-1. C1 SUNY BUFFALO,DEPT CHEM,BUFFALO,NY 14214. BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. UNIV TASMANIA,DEPT BIOCHEM,HOBART,TAS 7001,AUSTRALIA. SUNY BUFFALO,DEPT BIOMAT,BUFFALO,NY 14214. OI Sharma, Virender/0000-0002-5980-8675 NR 26 TC 31 Z9 33 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0743-7463 J9 LANGMUIR JI Langmuir PD FEB PY 1992 VL 8 IS 2 BP 676 EP 679 DI 10.1021/la00038a062 PG 4 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA HG566 UT WOS:A1992HG56600062 ER PT J AU RUGGIERO, AJ AF RUGGIERO, AJ TI ACTIVELY MODELOCKED LASERS PRODUCE PICOSECOND PULSES SO LASER FOCUS WORLD LA English DT Article ID ND-YAG LASER; MODE; MODULATION RP RUGGIERO, AJ (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,ENERGET MAT SECT,L-277,POB 808,LIVERMORE,CA 94550, USA. NR 22 TC 0 Z9 0 U1 0 U2 1 PU PENNWELL PUBL CO PI NASHUA PA 5TH FLOOR TEN TARA BOULEVARD, NASHUA, NH 03062-2801 SN 0740-2511 J9 LASER FOCUS WORLD JI Laser Focus World PD FEB PY 1992 VL 28 IS 2 BP 55 EP & PG 0 WC Optics SC Optics GA HD400 UT WOS:A1992HD40000019 ER PT J AU SCHUPP, P WATTS, P ZUMINO, B AF SCHUPP, P WATTS, P ZUMINO, B TI THE 2-DIMENSIONAL QUANTUM EUCLIDEAN ALGEBRA SO LETTERS IN MATHEMATICAL PHYSICS LA English DT Article AB The algebra dual to Woronowicz's deformation of the two-dimensional Euclidean group is constructed. The same algebra is obtained from SU(q)(2) via contraction on both the group and algebra levels. C1 LAWRENCE BERKELEY LAB,DIV PHYS,THEORET PHYS GRP,BERKELEY,CA 94720. RP SCHUPP, P (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 8 TC 25 Z9 26 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0377-9017 J9 LETT MATH PHYS JI Lett. Math. Phys. PD FEB PY 1992 VL 24 IS 2 BP 141 EP 145 DI 10.1007/BF00402677 PG 5 WC Physics, Mathematical SC Physics GA HV024 UT WOS:A1992HV02400006 ER PT J AU ANDERSON, E BAI, Z DONGARRA, J AF ANDERSON, E BAI, Z DONGARRA, J TI GENERALIZED QR FACTORIZATION AND ITS APPLICATIONS SO LINEAR ALGEBRA AND ITS APPLICATIONS LA English DT Article; Proceedings Paper CT 4TH AUBURN LINEAR ALGEBRA CONF, IN HONOR OF KY FAN : DIRECTIONS IN MATRIX THEORY CY MAR 20-23, 1990 CL AUBURN UNIV, AUBURN, AL HO AUBURN UNIV ID LEAST-SQUARES PROBLEMS; PERTURBATION AB The purpose of this paper is to reintroduce the generalized QR factorization with or without pivoting of two matrices A and B having the same number of rows. When B is square and nonsingular, the factorization implicitly gives the orthogonal factorization of B-1A. Continuing the work of Paige and Hammarling, we discuss the different forms of the factorization from the point of view of general-purpose software development. In addition, we demonstrate the applications of the GQR factorization in solving the linear equality-constrained least-squares problem and the generalized linear regression problem, and in estimating the conditioning of these problems. C1 UNIV KENTUCKY,DEPT MATH,LEXINGTON,KY 40506. UNIV TENNESSEE,DEPT COMP SCI,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,MATH SCI SECT,OAK RIDGE,TN 37831. RP ANDERSON, E (reprint author), CRAY RES INC,655F LONE OAK DR,EAGAN,MN 55121, USA. RI Dongarra, Jack/E-3987-2014 NR 23 TC 11 Z9 11 U1 1 U2 1 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0024-3795 J9 LINEAR ALGEBRA APPL JI Linear Alg. Appl. PD FEB PY 1992 VL 162 BP 243 EP 271 DI 10.1016/0024-3795(92)90379-O PG 29 WC Mathematics, Applied; Mathematics SC Mathematics GA HD036 UT WOS:A1992HD03600012 ER PT J AU JERVIS, TR HIRVONEN, JP NASTASI, M AF JERVIS, TR HIRVONEN, JP NASTASI, M TI EXCIMER LASER SURFACE PROCESSING FOR TRIBOLOGICAL APPLICATIONS IN METALS AND CERAMICS SO LUBRICATION ENGINEERING LA English DT Article ID AISI-304 STAINLESS-STEEL; MECHANICAL-PROPERTIES; TI; MICROSTRUCTURE; IMPLANTATION; FRICTION; FILMS AB The use of pulsed excimer lasers, operating at UV wavelengths, for surface modification has many potential applications in the tribology of metals and ceramics. Alterations of surface chemistry and microstructure are possible on standard engineering materials. Improved tribological performance in stainless steel by the formation of a unique oxide and by Ti mixing and in SiC by Ti mixing has been demonstrated. Specifically, reduced friction in dry sliding conditions and a change in the wear process have been observed, resulting in greatly reduced surface damage. RP JERVIS, TR (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87544, USA. NR 26 TC 3 Z9 4 U1 1 U2 1 PU SOC TRIBOLOGISTS & LUBRICATION ENGINEERS PI PARK RIDGE PA 838 BUSSE HIGHWAY, PARK RIDGE, IL 60068 SN 0024-7154 J9 LUBR ENG JI Lubric. Eng. PD FEB PY 1992 VL 48 IS 2 BP 141 EP 146 PG 6 WC Engineering, Mechanical SC Engineering GA HD821 UT WOS:A1992HD82100006 ER PT J AU PHAM, HA AF PHAM, HA TI OPTIMAL-DESIGN OF HYBRID FAULT-TOLERANT COMPUTER-SYSTEMS SO MATHEMATICAL AND COMPUTER MODELLING LA English DT Article AB In many critical applications of digital systems, fault tolerance has been an essential architectural attribute for achieving high reliability. We address the problem of designing an optimal hybrid fault-tolerant computer system. The designer of a system is always confronted with the problem of trading off reliability vs. cost. On the one hand, it is essential to provide for each vital module of the system as many spare units as possible in order to ensure high reliability. On the other hand, it is essential not to have an excessively costly, heavy or bulky system. In this paper, we determine the optimal number of spare units which minimizes the average total system cost. A numerical example is provided to illustrate the methods. RP PHAM, HA (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 16 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0895-7177 J9 MATH COMPUT MODEL JI Math. Comput. Model. PD FEB PY 1992 VL 16 IS 2 BP 29 EP 33 DI 10.1016/0895-7177(92)90004-5 PG 5 WC Computer Science, Interdisciplinary Applications; Computer Science, Software Engineering; Mathematics, Applied SC Computer Science; Mathematics GA HF781 UT WOS:A1992HF78100003 ER PT J AU KOWLURU, RA KOWLURU, A AF KOWLURU, RA KOWLURU, A TI ERYTHROCYTE SODIUM-POTASSIUM ATPASE ACTIVITY AND THIOL METABOLISM IN GENETICALLY HYPERGLYCEMIC MICE SO METABOLISM-CLINICAL AND EXPERIMENTAL LA English DT Article ID NA+-K+-ATPASE; POLYOL PATHWAY ACTIVITY; DIABETES-MELLITUS; ALDOSE REDUCTASE; PUMPING ACTIVITY; MYOINOSITOL; SORBINIL; INHIBITION; RATS; GLYCOSYLATION C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV LIFE SCI,CELLULAR & MOLEC BIOL GRP,LOS ALAMOS,NM 87544. NR 31 TC 9 Z9 9 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0026-0495 J9 METABOLISM JI Metab.-Clin. Exp. PD FEB PY 1992 VL 41 IS 2 BP 160 EP 164 DI 10.1016/0026-0495(92)90145-Z PG 5 WC Endocrinology & Metabolism SC Endocrinology & Metabolism GA HC642 UT WOS:A1992HC64200011 PM 1310517 ER PT J AU CHANG, KS STASS, SA CHU, DT DEAVEN, LL TRUJILLO, JM FREIREICH, EJ AF CHANG, KS STASS, SA CHU, DT DEAVEN, LL TRUJILLO, JM FREIREICH, EJ TI CHARACTERIZATION OF A FUSION CDNA (RARA/MYL) TRANSCRIBED FROM THE T(15-17) TRANSLOCATION BREAKPOINT IN ACUTE PROMYELOCYTIC LEUKEMIA SO MOLECULAR AND CELLULAR BIOLOGY LA English DT Article ID RETINOIC ACID RECEPTOR; MYELOGENOUS LEUKEMIA; MESSENGER-RNA; STRANDED-DNA; GENE; DIFFERENTIATION; IDENTIFICATION; CHROMOSOME-17; PURIFICATION; LIBRARIES AB A nonrandom chromosomal translocation breakpoint, t(15;17)(q22;q21), is found in almost all patients with acute promyelocytic leukemia (APL). Most of these breakpoints occur within the second intron of the retinoic acid receptor-alpha (RARA) gene. We screened a cDNA library of APL and have identified and sequenced a cDNA transcribed from the t(15;17) translocation breakpoint. The 5' end of cDNA p1715 consists of 503 bp of the RARA exon II sequence. A 1.76-kb cDNA without homology to any known gene available in GenBank was found truncated downstream. This cDNA sequence was assigned to chromosome 15 by dot blot hybridization of the flow cytometry-sorted chromosomes. We designate this fusion cDNA RARA/myl, which is different from myl/RARA reported by de The et al. (H. de The, C. Chomienne, M. Lanotte, L. Degos, and A. Dejean, Nature (London) 347:558-561, 1990). This result demonstrates that the two different types of hybrid mRNA can be transcribed from this breakpoint. We screened a non-APL cDNA library and identified a 2.8-kb myl cDNA. This cDNA is able to encode a polypeptide with a molecular weight of 78,450. Alternative splicing of the myl gene which resulted in myl proteins with different C terminals was found. Southern blot analysis of the genomic DNA isolated from 17 APL patients by using the myl DNA probe demonstrated that the myl gene in 12 samples was rearranged. Northern (RNA) blot analysis of RARA gene expression in two APL RNA samples showed abnormal mRNA species of 4.2 and 3.2 kb in one patient and of 4.8 and 3.8 kb in another patient; these were in addition to the normal mRNA species of 3.7 and 2.7-kb. The myl DNA probe detected a 2.6-kb abnormal mRNA in addition to the normal mRNA species of 3.2, 4.2, and 5.5 kb. Using the polymerase chain reaction, we demonstrated that both RARA/myl and myl/RARA were coexpressed in samples from three different APL patients. From this study, we conclude that the t(15;17) translocation breakpoint results in the transcription of two different fusion transcripts which are expected to be translated into fusion proteins. C1 UNIV TEXAS,MD ANDERSON CANCER CTR,ADULT LEUKEMIA RES PROGRAM,HOUSTON,TX 77030. UNIV CALIF LOS ALAMOS SCI LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. RP CHANG, KS (reprint author), UNIV TEXAS,MD ANDERSON CANCER CTR,DIV LAB MED,HEMATOPATHOL PROGRAM,HOUSTON,TX 77030, USA. FU NCI NIH HHS [CA 39809-07] NR 48 TC 84 Z9 86 U1 0 U2 0 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0270-7306 J9 MOL CELL BIOL JI Mol. Cell. Biol. PD FEB PY 1992 VL 12 IS 2 BP 800 EP 810 PG 11 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA HB066 UT WOS:A1992HB06600036 PM 1310153 ER PT J AU SAMARA, GA AF SAMARA, GA TI DOE CENTER OF EXCELLENCE FOR SYNTHESIS AND PROCESSING OF ADVANCED MATERIALS SO MRS BULLETIN LA English DT Letter RP SAMARA, GA (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0883-7694 J9 MRS BULL JI MRS Bull. PD FEB PY 1992 VL 17 IS 2 BP 16 EP 16 PG 1 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA HE845 UT WOS:A1992HE84500002 ER PT J AU VENKATESAN, T WU, XD MUENCHAUSEN, R PIQUE, A AF VENKATESAN, T WU, XD MUENCHAUSEN, R PIQUE, A TI PULSED LASER DEPOSITION - FUTURE-DIRECTIONS SO MRS BULLETIN LA English DT Article ID SUPERCONDUCTING THIN-FILMS; HIGH-TC; YBA2CU3O7-X/PRBA2CU3O7-X SUPERLATTICES; 100 SRTIO3; EVAPORATION C1 UNIV CALIF LOS ALAMOS SCI LAB,CTR EXPLORATORY RES & DEV,LOS ALAMOS,NM 87544. NEOCERA INC,TECH STAFF,COLLEGE PK,MD. RP VENKATESAN, T (reprint author), UNIV MARYLAND,CTR SUPERCONDUCTIV RES,COLLEGE PK,MD 20742, USA. RI Venkatesan, Thirumalai/E-1667-2013 NR 23 TC 33 Z9 33 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0883-7694 J9 MRS BULL JI MRS Bull. PD FEB PY 1992 VL 17 IS 2 BP 54 EP 58 PG 5 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA HE845 UT WOS:A1992HE84500008 ER PT J AU MURPHY, SA TICE, RR SMITH, MG MARGOLIN, BH AF MURPHY, SA TICE, RR SMITH, MG MARGOLIN, BH TI CONTRIBUTIONS TO THE DESIGN AND STATISTICAL-ANALYSIS OF INVIVO SCE EXPERIMENTS SO MUTATION RESEARCH LA English DT Article DE SCE EXPERIMENTS; INVIVO; DESIGN AND STATISTICAL ANALYSIS ID SISTER-CHROMATID EXCHANGES; CELLS AB Two issues that arise in the design and statistical analysis of in vivo SCE and similar experiments are considered. First, with regard to analysis, the merits of various methods of data transformation are explored in depth. The conclusion drawn is that common transformations of the type studied here seemingly offer little advantage in the assessment of whether a test agent induces SCE in a dose-related manner. Second, a proposal is made for a method to determine, subject to budgetary constraints, the desired numbers of animals/dose group and cells scored/animal. The approach advocated also lends itself to discussions weighing the gains and losses from possible reductions in the number of animals below the 'desired' levels. C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. UNIV N CAROLINA,DEPT BIOSTAT,CHAPEL HILL,NC 27599. RP MURPHY, SA (reprint author), PENN STATE UNIV,DEPT STAT,UNIV PK,PA 16802, USA. FU NIEHS NIH HHS [Y01-ES-20098] NR 13 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-8262 J9 MUTAT RES PD FEB PY 1992 VL 271 IS 1 BP 39 EP 48 DI 10.1016/0165-1161(92)90030-P PG 10 WC Genetics & Heredity; Toxicology SC Genetics & Heredity; Toxicology GA HD704 UT WOS:A1992HD70400004 PM 1371828 ER PT J AU LEVINE, MD MEYERS, S AF LEVINE, MD MEYERS, S TI THE CONTRIBUTION OF ENERGY EFFICIENCY TO SUSTAINABLE DEVELOPMENT IN DEVELOPING-COUNTRIES SO NATURAL RESOURCES FORUM LA English DT Article AB The demand for energy services is growing rapidly in developing countries. Low levels of energy efficiency in electric power supply and in energy use mean that the energy sector threatens to absorb an intolerably high share of available financial resources. Energy inefficiency also contributes to local and global environmental problems. A strategy of vigorously improving energy efficiency is thus a key element of a sustainable development path. Results reported in this paper show that there is considerable room for efficiency improvement in both existing and new capital stocks, but a much larger effort than presently underway is essential if the potential is to be realized. Assistance from the industrialized countries can play a major role in such an effort. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,INT ENERGY STUDIES GRP,BERKELEY,CA 94720. RP LEVINE, MD (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,ENERGY ANAL PROGRAMME,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 18 TC 1 Z9 1 U1 0 U2 1 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0165-0203 J9 NAT RESOUR FORUM PD FEB PY 1992 VL 16 IS 1 BP 19 EP 26 PG 8 WC Environmental Sciences; Environmental Studies SC Environmental Sciences & Ecology GA HF605 UT WOS:A1992HF60500003 ER PT J AU WARE, AG SHAH, VN AF WARE, AG SHAH, VN TI AGE-RELATED DEGRADATION OF BOILING WATER-REACTOR VESSEL INTERNALS SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article; Proceedings Paper CT MEETING ON STRUCTURAL MECHANICS IN REACTOR TECHNOLOGY ( SMIT-10 ) CY AUG 14-18, 1989 CL ANAHEIM, CA AB Researchers at the Idaho National Engineering Laboratory performed an assessment of the aging of the reactor internals in boiling water reactors (BWRs), and identified the unresolved technical issues related to the degradation of these components. The overall life-limiting mechanism is intergranular stress corrosion cracking (IGSCC). Irradiation-assisted stress corrosion cracking, fatigue, and thermal aging embrittlement are other potential degradation mechanisms. Several failures in BWR internals have been caused by a combination of factors such as environment, high residual or preload stresses, and flow-induced vibration. The ASME Code Section XI in-service inspection requirements are insufficient for detecting aging-related degradation at many locations in reactor internals. Many of the potential locations for IGSCC or fatigue are not accessible for inspection. RP WARE, AG (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 31 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD FEB PY 1992 VL 133 IS 1 BP 49 EP 62 DI 10.1016/0029-5493(92)90088-D PG 14 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HP936 UT WOS:A1992HP93600008 ER PT J AU PFEIFFER, PA KENNEDY, JM MARCHERTAS, AH AF PFEIFFER, PA KENNEDY, JM MARCHERTAS, AH TI POSTTEST ANALYSIS FOR THE NONLINEAR RESPONSE OF AN INTERNALLY PRESSURIZED 1/6 SCALE REINFORCED-CONCRETE CONTAINMENT MODEL SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article; Proceedings Paper CT MEETING ON STRUCTURAL MECHANICS IN REACTOR TECHNOLOGY ( SMIT-10 ) CY AUG 14-18, 1989 CL ANAHEIM, CA AB Pretest predictions have been previously made and reported by the Engineering Mechanics Program of the Reactor Analysis and Safety Division for the response of the one sixth scale reinforced concrete model tested by Sandia National Laboratories in July 1987. A series of axisymmetric models were studied with the two-dimensional computer program TEMP-STRESS. This report describes the comparison between the pretest predictions and the experimental results; a post-test analysis with a precracked concrete model is also compared to the pretest predictions and the experimental results. The post-test analysis is in excellent agreement with the experimental results. Explanations are given for the apparent precracked state of the containment vessel. C1 NO ILLINOIS UNIV,DEPT MECH ENGN,DE KALB,IL 60115. RP PFEIFFER, PA (reprint author), ARGONNE NATL LAB,DIV REACTOR ANAL & SAFETY,ARGONNE,IL 60439, USA. NR 27 TC 5 Z9 5 U1 0 U2 1 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD FEB PY 1992 VL 133 IS 1 BP 143 EP 157 DI 10.1016/0029-5493(92)90099-H PG 15 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HP936 UT WOS:A1992HP93600019 ER PT J AU FANOUS, F GREIMANN, L WASSEF, W AF FANOUS, F GREIMANN, L WASSEF, W TI ANALYSIS OF AN ICE-CONDENSER CONTAINMENT BUILDING ANCHORAGE SYSTEM SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article; Proceedings Paper CT MEETING ON STRUCTURAL MECHANICS IN REACTOR TECHNOLOGY ( SMIT-10 ) CY AUG 14-18, 1989 CL ANAHEIM, CA AB A 3-D non-linear finite-element analysis of an ice-condenser steel containment anchorage system, which considers the parameters that affect this complex system, was performed. The model included a portion of the containment shell, knuckle plate, base plate, reinforced concrete mat, anchor bolt, anchorage system, soil foundation material, and a portion of the containment sheild building. The results showed the early formation of conical failure surfaces within the concrete that are associated with the brittle failure mode. However, these surfaces were not completely developed to the top of the containment basemat. No high strains were recorded in the anchorage system or the containment shell. Hence, failure of the containment anchorage system was not hypothesized. RP FANOUS, F (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 16 TC 0 Z9 0 U1 1 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD FEB PY 1992 VL 133 IS 1 BP 159 EP 168 DI 10.1016/0029-5493(92)90100-A PG 10 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HP936 UT WOS:A1992HP93600020 ER PT J AU REBUT, PH GIBSON, A HUGUET, M ADAMS, JM ALPER, B ALTMANN, H ANDERSEN, A ANDREW, P ANGELONE, M ALIARSHAD, S BAIGGER, P BAILEY, W BALET, B BARABASCHI, P BARKER, P BARNSLEY, R BARONIAN, M BARTLETT, DV BAYLOR, L BELL, AC BENALI, G BERTOLDI, P BERTOLINI, E BHATNAGAR, V BICKLEY, AJ BINDER, D BINDSLEV, H BONICELLI, T BOOTH, SJ BOSIA, G BOTMAN, M BOUCHER, D BOUCQUEY, P BREGER, P BRELEN, H BRINKSCHULTE, H BROOKS, D BROWN, A BROWN, T BRUSATI, M BRYAN, S BRZOZOWSKI, J BUCHSE, R BUDD, T BURES, M BUSINARO, T BUTCHER, P BUTTGEREIT, H CALDWELLNICHOLS, C CAMPBELL, DJ CARD, P CELENTANO, G CHALLIS, CD CHANKIN, AV CHERUBINI, A CHIRON, D CHRISTIANSEN, J CHUILON, P CLAESEN, R CLEMENT, S CLIPSHAM, E COAD, JP COFFEY, IH COLTON, A COMISKEY, M CONROY, S COOKE, M COOPER, D COOPER, S CORDEY, JG CORE, W CORRIGAN, G CORTI, S COSTLEY, AE COTTRELL, G COX, M CRIPWELL, P DACOSTA, O DAVIES, J DAVIES, N DEBLANK, H DEESCH, H DEKOCK, L DEKSNIS, E DELVART, F DENNEHINNOV, GB DESCHAMPS, G DICKSON, WJ DIETZ, KJ DMITRENKO, SL DMITRIEVA, M DOBBING, J DOGLIO, A DOLGETTA, N DORLING, SE DOYLE, PG DUCHS, DF DUQUENOY, H EDWARDS, A EHRENBERG, J EKEDAHL, A ELEVANT, T ERENTS, SK ERIKSSON, LG FAJEMIROKUN, H FALTER, H FREILING, J FREVILLE, F FROGER, C FROISSARD, P FULLARD, K GADEBERG, M GALETSAS, A GALLAGHER, T GAMBIER, D GARRIBBA, M GAZE, P GIANNELLA, R GILL, RD GIRARD, A GONDHALEKAR, A GOODALL, D GORMEZANO, C GOTTARDI, NA GOWERS, C GREEN, BJ GRIEVSON, B HAANGE, R HAIGH, A HANCOCK, CJ HARBOUR, PJ HARTRAMPF, T HAWKES, NC HAYNES, P HEMMERICH, JL HENDER, T HOEKZEMA, J HOLLAND, D HONE, M HORTON, L HOW, J HUART, M HUGHES, I HUGHES, TP HUGON, M HUO, Y IDA, K INGRAM, B IRVING, M JACQUINOT, J JAECKEL, H JAEGER, JF JANESCHITZ, G JANKOVICZ, Z JARVIS, ON JENSEN, F JONES, EM JONES, HD JONES, LPDF JONES, S JONES, TTC JUNGER, JF JUNIQUE, F KAYE, A KEEN, BE KEILHACKER, M KELLY, GJ KERNER, W KHUDOLEEV, A KONIG, R KONSTANTELLOS, A KOVANEN, M KRAMER, G KUPSCHUS, P LASSER, R LAST, JR LAUNDY, B LAUROTARONI, L LAVEYRY, M LAWSON, K LENNHOLM, M LINGERTAT, J LITUNOVSKI, RN LOARTE, A LOBEL, R LOMAS, P LOUGHLIN, M LOWRY, C LUPO, J MAAS, AC MACHUZAK, J MACKLIN, B MADDISON, G MAGGI, CF MAGYAR, G MANDL, W MARCHESE, V MARCON, G MARCUS, F MART, J MARTIN, D MARTIN, E MARTINSOLIS, R MASSMANN, P MATTHEWS, G MCBRYAN, H MCCRACKEN, G MCKIVITT, J MERIGUET, P MIELE, P MILLER, A MILLS, J MILLS, SF MILLWARD, P MILVERTON, P MINARDI, E MOHANTI, R MONDINO, PL MONTGOMERY, D MONTVAI, A MORGAN, P MORSI, H MUIR, D MURPHY, G MYRNAS, R NAVE, F NEWBERT, G NEWMAN, M NIELSEN, P NOLL, P OBERT, W OBRIEN, D ORCHARD, J OROURKE, J OSTROM, R OTTAVIANI, M PAIN, M PAOLETTI, F PAPASTERGIOU, S PARSONS, W PASINI, D PATEL, D PEACOCK, A PEACOCK, N PEARCE, RJM PEARSON, D PENG, JF DESILVA, RP PERINIC, G PERRY, C PETROV, M PICK, MA PLANCOULAINE, J POFFE, JP POHLCHEN, R PORCELLI, F PORTE, L PRENTICE, R PUPPIN, S PUTVINSKII, S RADFORD, G RAIMONDI, T DEANDRADE, MCR REICHLE, R REID, J RICHARDS, S RIGHI, E RIMINI, F ROBINSON, D ROLFE, A ROSS, RT ROSSI, L RUSS, R RUTTER, P SACK, HC SADLER, G SAIBENE, G SALANAVE, JL SANAZZARO, G SANTAGIUSTINA, A SARTORI, R SBORCHIA, C SCHILD, P SCHMID, M SCHMIDT, G SCHUNKE, B SCOTT, SM SERIO, L SIBLEY, A SIMONINI, R SIPS, ACC SMEULDERS, P SMITH, R STAGG, R STAMP, M STANGEBY, P STANKIEWICZ, R START, DF STEED, CA STORK, D STOTT, PE STUBBERFIELD, P SUMMERS, D SUMMERS, H SVENSSON, L TAGLE, JA TALBOT, M TANGA, A TARONI, A TERELLA, C TERRINGTON, A TESINI, A THOMAS, PR THOMPSON, E THOMSEN, K TIBONE, F TISCORNIA, A TREVALION, P TUBBING, B VANBELLE, P VANDERBEKEN, H VLASES, G VONHELLERMANN, M WADE, T WALKER, C WALTON, R WARD, D WATKINS, ML WATKINS, N WATSON, MJ WEBER, S WESSON, J WIJNANDS, TJ WILKS, J WILSON, D WINKEL, T WOLF, R WONG, D WOODWARD, C WU, Y WYKES, M YOUNG, D YOUNG, ID ZANNELLI, L ZOLFAGHARI, A ZWINGMANN, W AF REBUT, PH GIBSON, A HUGUET, M ADAMS, JM ALPER, B ALTMANN, H ANDERSEN, A ANDREW, P ANGELONE, M ALIARSHAD, S BAIGGER, P BAILEY, W BALET, B BARABASCHI, P BARKER, P BARNSLEY, R BARONIAN, M BARTLETT, DV BAYLOR, L BELL, AC BENALI, G BERTOLDI, P BERTOLINI, E BHATNAGAR, V BICKLEY, AJ BINDER, D BINDSLEV, H BONICELLI, T BOOTH, SJ BOSIA, G BOTMAN, M BOUCHER, D BOUCQUEY, P BREGER, P BRELEN, H BRINKSCHULTE, H BROOKS, D BROWN, A BROWN, T BRUSATI, M BRYAN, S BRZOZOWSKI, J BUCHSE, R BUDD, T BURES, M BUSINARO, T BUTCHER, P BUTTGEREIT, H CALDWELLNICHOLS, C CAMPBELL, DJ CARD, P CELENTANO, G CHALLIS, CD CHANKIN, AV CHERUBINI, A CHIRON, D CHRISTIANSEN, J CHUILON, P CLAESEN, R CLEMENT, S CLIPSHAM, E COAD, JP COFFEY, IH COLTON, A COMISKEY, M CONROY, S COOKE, M COOPER, D COOPER, S CORDEY, JG CORE, W CORRIGAN, G CORTI, S COSTLEY, AE COTTRELL, G COX, M CRIPWELL, P DACOSTA, O DAVIES, J DAVIES, N DEBLANK, H DEESCH, H DEKOCK, L DEKSNIS, E DELVART, F DENNEHINNOV, GB DESCHAMPS, G DICKSON, WJ DIETZ, KJ DMITRENKO, SL DMITRIEVA, M DOBBING, J DOGLIO, A DOLGETTA, N DORLING, SE DOYLE, PG DUCHS, DF DUQUENOY, H EDWARDS, A EHRENBERG, J EKEDAHL, A ELEVANT, T ERENTS, SK ERIKSSON, LG FAJEMIROKUN, H FALTER, H FREILING, J FREVILLE, F FROGER, C FROISSARD, P FULLARD, K GADEBERG, M GALETSAS, A GALLAGHER, T GAMBIER, D GARRIBBA, M GAZE, P GIANNELLA, R GILL, RD GIRARD, A GONDHALEKAR, A GOODALL, D GORMEZANO, C GOTTARDI, NA GOWERS, C GREEN, BJ GRIEVSON, B HAANGE, R HAIGH, A HANCOCK, CJ HARBOUR, PJ HARTRAMPF, T HAWKES, NC HAYNES, P HEMMERICH, JL HENDER, T HOEKZEMA, J HOLLAND, D HONE, M HORTON, L HOW, J HUART, M HUGHES, I HUGHES, TP HUGON, M HUO, Y IDA, K INGRAM, B IRVING, M JACQUINOT, J JAECKEL, H JAEGER, JF JANESCHITZ, G JANKOVICZ, Z JARVIS, ON JENSEN, F JONES, EM JONES, HD JONES, LPDF JONES, S JONES, TTC JUNGER, JF JUNIQUE, F KAYE, A KEEN, BE KEILHACKER, M KELLY, GJ KERNER, W KHUDOLEEV, A KONIG, R KONSTANTELLOS, A KOVANEN, M KRAMER, G KUPSCHUS, P LASSER, R LAST, JR LAUNDY, B LAUROTARONI, L LAVEYRY, M LAWSON, K LENNHOLM, M LINGERTAT, J LITUNOVSKI, RN LOARTE, A LOBEL, R LOMAS, P LOUGHLIN, M LOWRY, C LUPO, J MAAS, AC MACHUZAK, J MACKLIN, B MADDISON, G MAGGI, CF MAGYAR, G MANDL, W MARCHESE, V MARCON, G MARCUS, F MART, J MARTIN, D MARTIN, E MARTINSOLIS, R MASSMANN, P MATTHEWS, G MCBRYAN, H MCCRACKEN, G MCKIVITT, J MERIGUET, P MIELE, P MILLER, A MILLS, J MILLS, SF MILLWARD, P MILVERTON, P MINARDI, E MOHANTI, R MONDINO, PL MONTGOMERY, D MONTVAI, A MORGAN, P MORSI, H MUIR, D MURPHY, G MYRNAS, R NAVE, F NEWBERT, G NEWMAN, M NIELSEN, P NOLL, P OBERT, W OBRIEN, D ORCHARD, J OROURKE, J OSTROM, R OTTAVIANI, M PAIN, M PAOLETTI, F PAPASTERGIOU, S PARSONS, W PASINI, D PATEL, D PEACOCK, A PEACOCK, N PEARCE, RJM PEARSON, D PENG, JF DESILVA, RP PERINIC, G PERRY, C PETROV, M PICK, MA PLANCOULAINE, J POFFE, JP POHLCHEN, R PORCELLI, F PORTE, L PRENTICE, R PUPPIN, S PUTVINSKII, S RADFORD, G RAIMONDI, T DEANDRADE, MCR REICHLE, R REID, J RICHARDS, S RIGHI, E RIMINI, F ROBINSON, D ROLFE, A ROSS, RT ROSSI, L RUSS, R RUTTER, P SACK, HC SADLER, G SAIBENE, G SALANAVE, JL SANAZZARO, G SANTAGIUSTINA, A SARTORI, R SBORCHIA, C SCHILD, P SCHMID, M SCHMIDT, G SCHUNKE, B SCOTT, SM SERIO, L SIBLEY, A SIMONINI, R SIPS, ACC SMEULDERS, P SMITH, R STAGG, R STAMP, M STANGEBY, P STANKIEWICZ, R START, DF STEED, CA STORK, D STOTT, PE STUBBERFIELD, P SUMMERS, D SUMMERS, H SVENSSON, L TAGLE, JA TALBOT, M TANGA, A TARONI, A TERELLA, C TERRINGTON, A TESINI, A THOMAS, PR THOMPSON, E THOMSEN, K TIBONE, F TISCORNIA, A TREVALION, P TUBBING, B VANBELLE, P VANDERBEKEN, H VLASES, G VONHELLERMANN, M WADE, T WALKER, C WALTON, R WARD, D WATKINS, ML WATKINS, N WATSON, MJ WEBER, S WESSON, J WIJNANDS, TJ WILKS, J WILSON, D WINKEL, T WOLF, R WONG, D WOODWARD, C WU, Y WYKES, M YOUNG, D YOUNG, ID ZANNELLI, L ZOLFAGHARI, A ZWINGMANN, W TI FUSION ENERGY-PRODUCTION FROM A DEUTERIUM-TRITIUM PLASMA IN THE JET TOKAMAK SO NUCLEAR FUSION LA English DT Article AB The paper describes a series of experiments in the Joint European Torus (JET), culminating in the first tokamak discharges in deuterium-tritium fuelled mixtures. The experiments were undertaken within limits imposed by restrictions on vessel activation and tritium usage. The objectives were: (i) to produce more than one megawatt of fusion power in a controlled way; (ii) to validate transport codes and provide a basis for accurately predicting the performance of deuterium-tritium plasma from measurements made in deuterium plasmas; (iii) to determine tritium retention in the torus systems and to establish the effectiveness of discharge cleaning techniques for tritium removal; (iv) to demonstrate the technology related to tritium usage; and (v) to establish safe procedures for handling tritium in compliance with the regulatory requirements. A single-null X-point magnetic configuration, diverted onto the upper carbon target, with reversed toroidal magnetic field was chosen. Deuterium plasmas were heated by high power, long duration deuterium neutral beams from fourteen sources and fuelled also by up to two neutral beam sources injecting tritium. The results from three of these high performance hot ion H-mode discharges are described: a high performance pure deuterium discharge; a deuterium-tritium discharge with a 1% mixture of tritium fed to one neutral beam source; and a deuterium-tritium discharge with 100% tritium fed to two neutral beam sources. The TRANSP code was used to check the internal consistency of the measured data and to determine the origin of the measured neutron fluxes. In the best deuterium-tritium discharge, the tritium concentration was about 11% at the time of peak performance, when the total neutron emission rate was 6.0 x 10(17) neutrons/s. The integrated total neutron yield over the high power phase, which lasted about 2 s, was 7.2 x 10(17) neutrons, with an accuracy of +/- 7%. The actual fusion amplification factor, Q(DT), was about 0.15. With an optimum tritium concentration, this pulse would have produced a fusion power of almost-equal-to 5 MW and a nominal Q(DT) almost-equal-to 0.46. The same extrapolation for the pure deuterium discharge would have given almost-equal-to 11 MW and a nominal Q(DT) = 1.14, so that the total fusion power (neutrons and alpha-particles) would have exceeded the total losses in the equivalent deuterium-tritium discharge in these transient conditions. Techniques for introducing, tracking, monitoring and recovering tritium were demonstrated to be highly effective: essentially all of the tritium introduced into the neutral beam system and, so far, about two thirds of that introduced into the torus have been recovered. C1 UNIV TORONTO,INST AEROSP STUDIES,TORONTO,ONTARIO,CANADA. ENEA,FRASCATI ENERGY RES CTR,FRASCATI,ITALY. UKAEA,CULHAM LAB,ABINGDON,OXON,ENGLAND. UNIV LONDON,IMPERIAL COLL SCI TECHNOL & MED,LONDON,ENGLAND. FOM,INST PLASMA PHYSICS RIJNHUIZEN,NIEUWEGEIN,NETHERLANDS. ACAD SINICA,INST PLASMA PHYS,HEFEI,PEOPLES R CHINA. NATL INST FUS SCI,NAGOYA,JAPAN. SOLTAN INST NUCL STUDIES,OTWOCK,POLAND. AF IOFFE PHYSICOTECH INST,ST PETERSBURG,USSR. LAB NACL ENGN & TECHNOL IND,SACAVEM,PORTUGAL. RCC CYFRONET,OTWOCK,POLAND. CTR INVEST ENERGET MEDIOAMBIENTALES & TECNOL,MADRID,SPAIN. FREE UNIV BERLIN,W-1000 BERLIN 33,GERMANY. CHINESE ACAD SCI,INST MECH,BEIJING,PEOPLES R CHINA. RISO NATL LAB,DK-4000 ROSKILDE,DENMARK. UNIV LEICESTER,LEICESTER LE1 7RH,ENGLAND. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. ROYAL INST TECHNOL,S-10044 STOCKHOLM 70,SWEDEN. IV KURCHATOV ATOM ENERGY INST,MOSCOW,USSR. QUEENS UNIV BELFAST,BELFAST BT7 1NN,ANTRIM,NORTH IRELAND. UNIV ESSEX,COLCHESTER CO4 3SQ,ESSEX,ENGLAND. UNIV STRATHCLYDE,GLASGOW G1 1XW,SCOTLAND. MV KELDYSH APPL MATH INST,MOSCOW,USSR. MIT,CTR PLASMA FUS,CAMBRIDGE,MA 02139. LAPPEENRANTA UNIV TECHNOL,NUCL ENGN LAB,SF-53851 LAPPEENRANTA 85,FINLAND. MAX PLANCK INST PLASMA PHYS,W-8046 GARCHING,GERMANY. UNIV MILAN,DEPT PHYS,I-20122 MILAN,ITALY. UNIV COMPLUTENSE MADRID,MADRID 3,SPAIN. N CAROLINA STATE UNIV,RALEIGH,NC 27695. DARTMOUTH COLL,HANOVER,NH 03755. HUNGARIAN ACAD SCI,CENT RES INST PHYS,H-1525 BUDAPEST,HUNGARY. UNIV LUND,S-22101 LUND,SWEDEN. UNIV OXFORD,INST MATH,OXFORD,ENGLAND. PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08544. RP REBUT, PH (reprint author), UKAEA,HARWELL LAB,HARWELL OX11 0RA,BERKS,ENGLAND. RI Nave, Maria/A-5581-2013; Ida, Katsumi/E-4731-2016 OI Nave, Maria/0000-0003-2078-6584; Ida, Katsumi/0000-0002-0585-4561 NR 13 TC 105 Z9 105 U1 5 U2 27 PU INT ATOMIC ENERGY AGENCY PI VIENNA PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA SN 0029-5515 J9 NUCL FUSION JI Nucl. Fusion PD FEB PY 1992 VL 32 IS 2 BP 187 EP 203 PG 17 WC Physics, Fluids & Plasmas SC Physics GA HK412 UT WOS:A1992HK41200001 ER PT J AU PITCHER, CS STANGEBY, PC BUDNY, RV BUSH, CE ELDER, JD KILPATRICK, SJ MANOS, DM MEDLEY, SS RAMSEY, AT SCHIVELL, JF ULRICKSON, M AF PITCHER, CS STANGEBY, PC BUDNY, RV BUSH, CE ELDER, JD KILPATRICK, SJ MANOS, DM MEDLEY, SS RAMSEY, AT SCHIVELL, JF ULRICKSON, M TI EFFECT OF THE BOUNDARY PLASMA ON TFTR OHMIC DISCHARGES SO NUCLEAR FUSION LA English DT Article ID OBLIQUE MAGNETIC-FIELD; IMPURITY PRODUCTION; EDGE CONDITIONS; BUMPER LIMITER; TRANSPORT; TOKAMAKS; BEHAVIOR; CARBON; DEPENDENCE; DENSITY AB The role of the boundary plasma in determining the power and particle balance of tokamak discharges is discussed. Detailed boundary plasma measurements of edge density, edge temperature, deuterium influx and carbon influx are reported from ohmically heated TFTR discharges over a range of plasma densities. The experimental results are compared with predictions from a simple zero-dimensional model based on power and particle balance. Reasonable agreement is obtained. More detailed impurity modelling is performed with the LIM impurity production and transport code. The complementary modelling approaches reveal, amongst other results, the important role of the sputtering yield at the limiter in determining the central effective charge of the discharge, the ability of a densified boundary plasma to screen impurities from the central plasma and the importance of cross-field particle transport to the TFTR limiter. The paper demonstrates that, under the conditions of this experiment, the behaviour of the boundary plasma and its effect on the central plasma appear to be explicable using rather simple considerations of power and particle balance. C1 CANADIAN FUS FUELS TECHNOL PROJECT,MISSISSAUGA L5J 1K3,ONTARIO,CANADA. UNIV TORONTO,INST AEROSP STUDIES,TORONTO M3H 5T6,ONTARIO,CANADA. RP PITCHER, CS (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08544, USA. NR 49 TC 10 Z9 10 U1 0 U2 4 PU INT ATOMIC ENERGY AGENCY PI VIENNA PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA SN 0029-5515 J9 NUCL FUSION JI Nucl. Fusion PD FEB PY 1992 VL 32 IS 2 BP 239 EP 256 DI 10.1088/0029-5515/32/2/I04 PG 18 WC Physics, Fluids & Plasmas SC Physics GA HK412 UT WOS:A1992HK41200004 ER PT J AU PERICOLIRIDOLFINI, V BARTIROMO, R TUCCILLO, AA LEUTERER, F SOLDNER, FX STEUER, KH BERNABEI, S AF PERICOLIRIDOLFINI, V BARTIROMO, R TUCCILLO, AA LEUTERER, F SOLDNER, FX STEUER, KH BERNABEI, S TI EFFECTS OF THE SPECTRAL BROADENING OF LOWER HYBRID WAVES ON CURRENT DRIVE EFFICIENCY IN THE ASDEX TOKAMAK SO NUCLEAR FUSION LA English DT Letter ID DENSITY-FLUCTUATIONS AB Full current drive operation was achieved on ASDEX for different Ohmic target plasmas by means of 2.45 GHz lower hybrid waves. Variations of the current drive efficiency of up to 50% have been observed which are correlated with the spectral broadening of the pump wave, as detected by an electro-magnetic probe. Parametric decay instabilities at the plasma edge or scattering of the lower hybrid waves can be responsible for these effects. The experiment can be explained within the approximations of the available current drive theory with a simple model assuming that the same process which leads to the frequency broadening causes a modification of the launched n parallel-to spectrum. C1 MAX PLANCK INST PLASMA PHYS,EURATOM IPP ASSOC,W-8046 GARCHING,GERMANY. PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08544. RP PERICOLIRIDOLFINI, V (reprint author), ENEA,ASSOC EURATOM FUS,CTR RIC ENERGIA FRASCATI,FRASCATI,ITALY. NR 17 TC 10 Z9 10 U1 1 U2 2 PU INT ATOMIC ENERGY AGENCY PI VIENNA PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA SN 0029-5515 J9 NUCL FUSION JI Nucl. Fusion PD FEB PY 1992 VL 32 IS 2 BP 286 EP 289 DI 10.1088/0029-5515/32/2/I10 PG 4 WC Physics, Fluids & Plasmas SC Physics GA HK412 UT WOS:A1992HK41200010 ER PT J AU CHRISTIANSEN, JP CORDEY, JG THOMSEN, K TANGA, A DEBOO, JC SCHISSEL, DP TAYLOR, TS KARDAUN, OJWF WAGNER, F RYTER, F KAYE, SM MIURA, Y SUZUKI, N MORI, M MATSUDA, T TAMAI, H TAKIZUKA, T ITOH, SI ITOH, K AF CHRISTIANSEN, JP CORDEY, JG THOMSEN, K TANGA, A DEBOO, JC SCHISSEL, DP TAYLOR, TS KARDAUN, OJWF WAGNER, F RYTER, F KAYE, SM MIURA, Y SUZUKI, N MORI, M MATSUDA, T TAMAI, H TAKIZUKA, T ITOH, SI ITOH, K TI GLOBAL ENERGY CONFINEMENT H-MODE DATABASE FOR ITER SO NUCLEAR FUSION LA English DT Article ID HEATED DIVERTOR DISCHARGES; DIII-D TOKAMAK; HIGH-BETA; PLASMA; REGIME; JET AB The paper describes the content of an H-mode confinement database that has been assembled for the ITER project. Data were collected from six machines of different sizes and shapes: ASDEX, DIII-D, JET, JFT-2M, PBX-M and PDX. A detailed description of the criteria used in the selection of the data and the definition of each of the variables is given. The paper also presents an analysis of the conditions of the database, the scalings (power law and offset linear) of the data with both dimensional and dimensionless variables, and predictions of the expected confinement time for ITER. C1 GEN ATOM CO,DIII-D RES TEAM,SAN DIEGO,CA 92138. MAX PLANCK INST PLASMA PHYS,ASDEX TEAM,W-8046 GARCHING,GERMANY. PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PDX & PBX-M TEAMS,PRINCETON,NJ 08544. JAPAN ATOM ENERGY RES INST,JFT2M GRP,TOKAI,IBARAKI 31911,JAPAN. NATL INST FUS SCI,NAGOYA 46401,JAPAN. RP CHRISTIANSEN, JP (reprint author), JET JOINT UNDERTAKING,ABINGDON,OXON,ENGLAND. NR 46 TC 66 Z9 68 U1 0 U2 3 PU INT ATOMIC ENERGY AGENCY PI VIENNA PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA SN 0029-5515 J9 NUCL FUSION JI Nucl. Fusion PD FEB PY 1992 VL 32 IS 2 BP 291 EP 338 DI 10.1088/0029-5515/32/2/I11 PG 48 WC Physics, Fluids & Plasmas SC Physics GA HK412 UT WOS:A1992HK41200011 ER PT J AU REHN, LE AF REHN, LE TI ION-BEAMS IN HIGH-TEMPERATURE SUPERCONDUCTIVITY RESEARCH SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article ID HIGH-TC-SUPERCONDUCTORS; YBA2CU3O7 THIN-FILMS; OXIDE SUPERCONDUCTORS; CHANNELING ANALYSIS; EPITAXIAL-GROWTH; IMPLANTATION; BACKSCATTERING; AMORPHIZATION; CRYSTALS AB As previous experience would suggest, ion beams have contributed to progress in high-T(c) superconductivity research primarily in four ways. Ion beams have been employed for (1) analyzing composition and structural details, including phonon properties; (2) fabricating thin-film specimens; (3) modifying properties for specific applications; and (4) performing fundamental irradiation effects studies. Examples of these contributions are presented in this brief summary, and the success of different approaches is evaluated. The emphasis is on the use of intermediate (50-500 keV) and higher (0.5-10 MeV) energy ion beams; space limitations preclude covering the wide range of activities that have occurred in any detail. Substantial contributions from ion-beam techniques to the rapid progress that has occurred in high-T(c) research are clearly evident. RP ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA. NR 50 TC 38 Z9 38 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X EI 1872-9584 J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD FEB PY 1992 VL 64 IS 1-4 BP 161 EP 168 DI 10.1016/0168-583X(92)95458-4 PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HK526 UT WOS:A1992HK52600028 ER PT J AU DOYLE, BL HORN, KM WALSH, DS SEXTON, FW AF DOYLE, BL HORN, KM WALSH, DS SEXTON, FW TI SINGLE EVENT UPSET IMAGING WITH A NUCLEAR MICROPROBE SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 10TH INTERNATIONAL CONF ON ION BEAM ANALYSIS CY JUL 01-05, 1991 CL EINDHOVEN UNIV TECHNOL, EINDHOVEN, NETHERLANDS SP EINDHOVEN UNIV TECHNOL, CANBERRA IND, APTEC EUROPE, BALZERS PERKIN ELMER PHYS ELECTR, CHARLES EVANS & ASSOC, DUTCH VACUUM SOC, ELSEVIER SCI PUBL, FISONS INSTRUMENTS, FDN FUNDAMENTAL RES MATTER, FDN PHYSICA HO EINDHOVEN UNIV TECHNOL ID ION AB An entirely new ion beam analysis technique is described: single event upset (SEU) imaging. SEU-imaging utilizes the scanning of a micro-focused MeV ion beam across an integrated circuit. This beam generates both electrons and logic state changes which are monitored by a computer. The data is collected in a way that permits the generation of visual images which depict both the physical appearance of the scanned region (through the ion-induced electron signals) and the areas of the IC which are susceptible to upset (through detection of chip malfunctions). Comparison of these images with the chip design facilitates matching the individual transistor components with the upset-sensitive region. While our initial results with 1-mu-m resolution ion beams have demonstrated the viability of this new technique in directly identifying the sources of upset in micron-scale integrated circuits, the trend toward submicron feature size will necessitate higher-resolution microprobes and improved appearance-imaging systems in future applications of this new technique. RP DOYLE, BL (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 11 TC 31 Z9 31 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 FEB PY 1992 VL 64 IS 1-4 BP 313 EP 320 DI 10.1016/0168-583X(92)95487-C PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HK526 UT WOS:A1992HK52600057 ER PT J AU ARNOLD, GW WESTRICH, HR CASEY, WH AF ARNOLD, GW WESTRICH, HR CASEY, WH TI APPLICATION OF ION-BEAM ANALYSIS (RBS AND ERD) TO THE SURFACE-CHEMISTRY STUDY OF LEACHED MINERALS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 10TH INTERNATIONAL CONF ON ION BEAM ANALYSIS CY JUL 01-05, 1991 CL EINDHOVEN UNIV TECHNOL, EINDHOVEN, NETHERLANDS SP EINDHOVEN UNIV TECHNOL, CANBERRA IND, APTEC EUROPE, BALZERS PERKIN ELMER PHYS ELECTR, CHARLES EVANS & ASSOC, DUTCH VACUUM SOC, ELSEVIER SCI PUBL, FISONS INSTRUMENTS, FDN FUNDAMENTAL RES MATTER, FDN PHYSICA HO EINDHOVEN UNIV TECHNOL ID LABRADORITE FELDSPAR; DISSOLUTION; MECHANISMS; GLASSES AB Labradorite feldspar (Ca0.61Na0.38Al1.61Si2.40O8.00) samples were reacted in solutions having pH values of 1-12 at 45-degreees-C. 2.8 MeV He RBS was used to profile the elemental constituents. 24 MeV Si ERD was applied to obtain the H-inventories. For pH < 4, the reacted near-surface region was found to be Si-rich and depleted in Al, Ca, and Na. The H uptake, however, was found to be much less than would be expected for exchange by H as H2O or H3O+. This discrepancy has been interpreted as evidence for the repolymerization of the near-surface region with subsequent loss of H2O. For pH values of 5-12, the dissolution is congruent and there is no apparent H uptake. The porous nature of the leached and repolymerized region has been established by RBS measurements on samples leached in a 0.01N HCl-(H2O)-O-16 solution (pH = 2) and then placed in an O-18 solution for varying time intervals (total time in both solutions constant at 404.25 h). Enrichment of O-18 and depletion of O-16 (over a leached depth of about 1000 angstrom) was observed for times greater than 17.5 h in the O-18 solution. The formation of a porous layer at low pH values which allows rapid diffusion to the interface has important implications for scenarios of rock-solution interaction. C1 UNIV CALIF DAVIS,DAVIS,CA 95616. RP ARNOLD, GW (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 12 TC 6 Z9 6 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 FEB PY 1992 VL 64 IS 1-4 BP 542 EP 546 DI 10.1016/0168-583X(92)95530-5 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HK526 UT WOS:A1992HK52600100 ER PT J AU UPADHYAYA, BR ERYUREK, E AF UPADHYAYA, BR ERYUREK, E TI APPLICATION OF NEURAL NETWORKS FOR SENSOR VALIDATION AND PLANT MONITORING SO NUCLEAR TECHNOLOGY LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON FAST REACTOR SAFETY CY AUG 12-16, 1990 CL SNOWBIRD, UT SP AMER NUCL SOC, EUROPEAN NUCL SOC, ATOM ENERGY SOC JAPAN, COMMISS EUROPEAN COMMUNITIES DE NEURAL NETWORKS; SENSOR VALIDATION; REACTOR MONITORING AB Sensor and process monitoring in power plants requires the estimation of one or more process variables. Neural network paradigms are suitable for establishing general nonlinear relationships among a set of plant variables. Multiple-input/multiple-output autoassociative networks can follow changes in plantwide behavior. The backpropagation (BPN) algorithm has been applied for training multilayer feedforward networks. A new and enhanced BPN algorithm for training neural networks has been developed and implemented in a VAX workstation. Operational data from the Experimental Breeder Reactor II (EBR-II) have been used to study the performance of the BPN algorithm. Several results of application to the EBR-II are presented. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP UPADHYAYA, BR (reprint author), UNIV TENNESSEE,PREVENT MAINTENANCE LAB,KNOXVILLE,TN 37996, USA. NR 12 TC 86 Z9 89 U1 0 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD FEB PY 1992 VL 97 IS 2 BP 170 EP 176 PG 7 WC Nuclear Science & Technology SC Nuclear Science & Technology GA GZ642 UT WOS:A1992GZ64200004 ER PT J AU ROYL, PH CAHALAN, JE FRIEDEL, G KUSSMAUL, G MOREAU, J PERKS, M WIGELAND, RA AF ROYL, PH CAHALAN, JE FRIEDEL, G KUSSMAUL, G MOREAU, J PERKS, M WIGELAND, RA TI PERFORMANCE OF METAL AND OXIDE FUEL CORES DURING ACCIDENTS IN LARGE LIQUID-METAL-COOLED REACTORS SO NUCLEAR TECHNOLOGY LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON FAST REACTOR SAFETY CY AUG 12-16, 1990 CL SNOWBIRD, UT SP AMER NUCL SOC, EUROPEAN NUCL SOC, ATOM ENERGY SOC JAPAN, COMMISS EUROPEAN COMMUNITIES DE LIQUID-METAL REACTOR; METALLIC FUEL; HYPOTHETICAL ACCIDENTS AB In a cooperative effort among European and U.S. analysts, an assessment of the comparative safety performance of metal and oxide fuels during accidents in a 3500-MW(thermal), pool-type, liquid-metal-cooled reactor (LMR) is performed. The study focuses on three accident initiators with failure to scram: the unprotected loss-of-flow (ULOF), the unprotected transient overpower, and the unprotected loss-of-heat-sink (ULOHS). Core designs with a similar power output that have been previously analyzed in Europe under ULOF accident conditions are also included in this comparison. Emphasis is placed on identification of design features that provide passive, self-limiting responses to postulated accident conditions and quantification of relative safety margins. The analyses show that in ULOF and ULOHS sequences, metal-fueled LMRs with pool-type primary systems provide larger temperature margins to coolant boiling than do oxide-fueled reactors of the same design. C1 ARGONNE NATL LAB,DIV REACTOR ANAL,ACCID METHODS & CODES SECT,ARGONNE,IL 60439. INTERATOM,EUROPEAN FAST REACTOR TEAM,W-5060 BERGISCH GLADBAC 1,GERMANY. CEN CADARACHE,F-13108 ST PAUL DURANCE,FRANCE. AEA TECHNOL,WARRINGTON WA3 6AT,CHESHIRE,ENGLAND. RP ROYL, PH (reprint author), KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH,INST REAKTORENTWICKLUNG,W-7500 KARLSRUHE 1,GERMANY. NR 11 TC 2 Z9 2 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD FEB PY 1992 VL 97 IS 2 BP 198 EP 211 PG 14 WC Nuclear Science & Technology SC Nuclear Science & Technology GA GZ642 UT WOS:A1992GZ64200007 ER PT J AU STRAIN, RV GROSS, KC LAMBERT, JDB COLBURN, RP ODO, T AF STRAIN, RV GROSS, KC LAMBERT, JDB COLBURN, RP ODO, T TI BEHAVIOR OF BREACHED MIXED-OXIDE FUEL-PINS DURING OFF-NORMAL HIGH-TEMPERATURE IRRADIATION SO NUCLEAR TECHNOLOGY LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON FAST REACTOR SAFETY CY AUG 12-16, 1990 CL SNOWBIRD, UT SP AMER NUCL SOC, EUROPEAN NUCL SOC, ATOM ENERGY SOC JAPAN, COMMISS EUROPEAN COMMUNITIES DE MIXED-OXIDE; IRRADIATION; BREACHED FUEL PINS AB A test containing 19 mixed-oxide fuel pins was operated in the Experimental Breeder Reactor II (EBR-II) at peak cladding temperatures near 800-degrees-C. Two test pins that had been designed to fail at approximately 5 at.% burnup and two low-burnup environmental pins failed and then were operated in the run beyond cladding breach mode for 22 days. Very high delayed neutron signals occurred during the irradiation of the test, and it was terminated as a result of high delayed neutron signals and evidence of plutonium in the coolant. Each of the four pins exhibited multiple breaches in the upper half of the fuel column. Measurements of fuel trapped on the filter section of a deposition sampler that was located above the test indicated that approximately 2.7 g of fuel was lost during the irradiation. Postirradiation examination of the pins indicates that most of the fuel was lost from a single pin. The fuel loss resulted in an increase in the background delayed neutron signal but had no other deleterious long-term effect on the operation of the EBR-II. C1 WESTINGHOUSE HANFORD CO,RICHLAND,WA 99352. POWER & NUCL FUEL DEV CORP,HIGASHI,IBARAKI,JAPAN. RP STRAIN, RV (reprint author), ARGONNE NATL LAB,DIV FUELS & PROC,EXPT ANAL GRP,ARGONNE,IL 60439, USA. NR 3 TC 4 Z9 4 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD FEB PY 1992 VL 97 IS 2 BP 227 EP 240 PG 14 WC Nuclear Science & Technology SC Nuclear Science & Technology GA GZ642 UT WOS:A1992GZ64200009 ER PT J AU SWEATT, WC AF SWEATT, WC TI TRANSFORMING A CIRCULAR LASER-BEAM INTO A SQUARE OR TRAPEZOID - ALMOST SO OPTICAL ENGINEERING LA English DT Article DE SPATIAL TRANSFORMATION; NON-GAUSSIAN BEAMS; COMPUTER-GENERATED HOLOGRAMS; HOLOGRAPHIC OPTICAL ELEMENTS; LASER CHEMISTRY; DYE LASERS AB An aberrated laser beam will change shape as it propagates. We use this phenomenon to transform a collimated, uniform-intensity, round beam into a square beam with rounded corners and a fairly uniform intensity. The square beam can be recollimated because no rays cross each other. We found a similar transformation that turns a circular beam into a trapezoidal shape with rounded corners. These aberrating elements can be fabricated using binary optics technology. RP SWEATT, WC (reprint author), SANDIA NATL LABS,DIV PHOTOMETR & OPT DEV,ALBUQUERQUE,NM 87185, USA. NR 6 TC 0 Z9 1 U1 0 U2 0 PU SOC PHOTO-OPT INSTRUM ENG PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD FEB PY 1992 VL 31 IS 2 BP 245 EP 250 DI 10.1117/12.56060 PG 6 WC Optics SC Optics GA HD795 UT WOS:A1992HD79500007 ER PT J AU RATHKE, JW KLINGLER, RJ KRAUSE, TR AF RATHKE, JW KLINGLER, RJ KRAUSE, TR TI THERMODYNAMICS FOR THE HYDROGENATION OF DICOBALT OCTACARBONYL IN SUPERCRITICAL CARBON-DIOXIDE SO ORGANOMETALLICS LA English DT Article ID HYDRIDES; DETECTOR; NMR AB Some thermodynamic parameters relevant to hydroformylation catalysis in supercritical media are reported. Equilibrium constants for the hydrogenation of Co2(CO)8 to produce HCo(CO)4 in supercritical CO2 at a gas density of 0.5 g/mL were determined using in situ high-pressure H-1 and Co59 NMR spectral measurements. van't Hoff plots for temperatures between 60 and 180-degrees-C yielded the enthalpy and entropy changes for the reaction, 4.7 +/- 0.2 kcal/mol and 4.4 +/- 0.5 cal/(mol.K), respectively. The results for the CO2 medium are close to reported values for liquid n-heptane solutions. The enthalpy and entropy of dissolution of Co2(CO)8 in CO2, 4.9 +/- 0.4 kcal/mol and 8 +/- 1 cal/(mol.K), respectively, are also reported. Solubility measurements were facilitated with use of a novel toroid NMR detector, which differs from conventional detectors in its internally confined magnetic flux. This feature allowed selective measurement of gaseous or dissolved species within the detector coil while minimizing interference from undissolved solids or liquids exterior to it. RP RATHKE, JW (reprint author), ARGONNE NATL LAB,DIV CHEM TECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 19 TC 48 Z9 49 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD FEB PY 1992 VL 11 IS 2 BP 585 EP 588 DI 10.1021/om00038a014 PG 4 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA HE298 UT WOS:A1992HE29800014 ER PT J AU LEMKE, FR SZALDA, DJ BULLOCK, RM AF LEMKE, FR SZALDA, DJ BULLOCK, RM TI INSERTION OF ISOCYANIDES INTO THE ZR-C BOND OF RUTHENIUM ZIRCONIUM DIMETALLOALKENES - SPECTROSCOPIC AND STRUCTURAL COMPARISONS OF THE ETA-2-IMINOACYL COMPLEXES CP(PME3)2RUCH=CRC(NTERTBU)ZRCLCP2 (R = H VS R = ME) AND KINETICS OF ISOMERIZATION OF A THERMODYNAMICALLY UNSTABLE ETA-2-IMINOACYL COMPLEX SO ORGANOMETALLICS LA English DT Article ID NUCLEAR MAGNETIC-RESONANCE; ETA-2-ACYL COMPLEXES; CARBON-MONOXIDE; GROUP-4 METALS; CARBONYLATION; ACTINIDES AB The reaction of Cp(PMe3)2RuCH = CHZrClCp2 with (t)BuNC produces an eta(2)-iminoacyl complex, Cp-(PMe3)2RuCH = CHC(N(t)Bu)ZrClCp2. The initially formed isomer of this compound is the ''N-outside'' isomer (2Hk), where the N-donor portion of the eta(2)-iminoacyl ligand is on the outside position of the three ligation sites of the Cp2Zr moiety. This kinetic isomer cleanly rearranges to the thermodynamic ''N-inside'' isomer (2Ht). Activation parameters determined for this rearrangement are DELTA-H double-ended-dagger = 19.9 +/- 0.6 kcal mol-1, DELTA-S double-ended-dagger = -3.4 +/- 2.2 cal K-1 mol-1, and DELTA-G double-ended-dagger (298 K) = 20.9 kcal mol-1. Spectroscopic and crystallographic data for 2Ht indicate a significant contribution from a zwitterionic resonance form that is facilitated by the disparate electronic properties of the electron-rich ruthenium and the electron-deficient zirconium moieties. The reaction of (t)BuNC with the analogous methylated dimetalloalkene Cp(PMe3)2RuCH = C-(CH3)ZrClCp2 gives the eta(2)-iminoacyl complex Cp(PMe3)2RuCH = C(CH3)C(N(t)Bu)ZrClCp2 (2Me). Spectroscopic and crystallographic data for 2Me indicate that the presence of a single methyl group has a profound influence on the structural and electronic properties of this eta(2)-iminoacyl complex, compared to 2Ht. In contrast to 2Ht, the metals and the organic bridging group in 2Me are twisted out of planarity in order to avoid an unfavorable interaction of the methyl group and the (t)Bu group. Spectroscopic and structural data suggest negligible contribution from the zwitterionic resonance form in this compound, due to steric inhibition of resonance. The reaction of the less sterically demanding isocyanide MeNC with Cp(PMe3)2RuCH = C(R)ZrClCp2 (R = H, CH3) gives Cp(PMe3)2RuCH = CHC(NMe)ZrClCp2 (3H) and Cp(PMe3)2RuCH = C(CH3)C(NMe)ZrClCp2 (3Me). Spectroscopic data for 3H and 3Me and structural data for 3Me indicate a contribution from a zwitterionic resonance form for both of these eta(2)-iminoacyl complexes. Crystallographic data for 2Ht: orthorhombic space group Pnma, a = 16.640 (3) angstrom, b = 13.936 (3) angstrom, c = 13.290 (3), V = 3082 (2) angstrom 3, Z = 4. Crystallographic data for 2Me: monoclinic space group P2(1)/c, a = 13.386 (3) angstrom, b = 22.514 (6) angstrom, c = 10.639 (3), beta = 91.89 (2)-degrees, V = 3205 (3) angstrom 3, Z = 4. Crystallographic data for 3Me: monoclinic space group P2(1)/n, a = 13.031 (3) angstrom, b = 14.880 (4) angstrom, c = 15.594 (3), beta = 108.08 (2)-degrees, V = 2874 (2) angstrom 3, Z = 4. C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. RI Bullock, R. Morris/L-6802-2016 OI Bullock, R. Morris/0000-0001-6306-4851 NR 22 TC 32 Z9 32 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD FEB PY 1992 VL 11 IS 2 BP 876 EP 884 DI 10.1021/om00038a056 PG 9 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA HE298 UT WOS:A1992HE29800056 ER PT J AU BENSON, JW ANGELICI, RJ AF BENSON, JW ANGELICI, RJ TI EQUILIBRIUM STUDIES OF THE DISPLACEMENT OF ETA-1(S)-THIOPHENES (TH) FROM CP(CO)(PPH3)RU(ETA-1(S)-TH)+ SO ORGANOMETALLICS LA English DT Article ID THIOPHENOPHANE METAL-COMPLEXES; HYDRODESULFURIZATION CATALYSTS; COORDINATED THIOPHENE; BOND-CLEAVAGE; MODEL; (ETA-THIOPHENE)RU(ETA-C5H5)+; ADSORPTION; RUTHENIUM(II); REACTIVITY; MECHANISM AB The reactions of Cp(CO)(PPh3)RuCl (Cp = eta(5)-C5H5) with Ag+ and thiophenes (Th) produce the stable sulfur-bound (eta(1)(S) thiophene complexes Cp(CO)(PPh3)Ru(eta(1)(S)-Th)+ (Th = T, 2-MeT, 3-MeT, 2,5-Me2T, Me4T, BT, and DBT). Equilibrium constants (K') for the displacement of thiophene (T) by methyl-substituted thiophenes, benzo[b]thiophene (BT), and dibenzothiophene (DBT), Cp(CO)(PPh3)Ru(eta(1)(S)-T)+ + Th' reversible Cp(CO)(PPh3)Ru(eta(1)(S)-Th')+ + T, increase in the following order: T (1) < 2,5-Me2T (2.76) < 2-MeT (4.11) < 3-MeT (6.30) < BT (29.9) < Me4T (57.4) < DBT (74.1). In general, methyl groups on thiophene increase K', but alpha-methyl groups reduce the stabilities of complexes with 2-MeT, 2,5-Me2T, and Me4T ligands due to a steric interaction with the PPh3 group. The ligands tetrahydrothiophene (THT) and MeCN have K' values (> 7.1 x 10(6)) which are much higher than any of the thiophenes, while MeI (K' = 2.0) is a slightly better ligand than T. An X-ray structure determination of [Cp(CO)(PPh3)Ru(2-MeT)BF4 is also reported. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 47 TC 63 Z9 63 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD FEB PY 1992 VL 11 IS 2 BP 922 EP 927 DI 10.1021/om00038a063 PG 6 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA HE298 UT WOS:A1992HE29800063 ER PT J AU CHEN, JA ANGELICI, RJ AF CHEN, JA ANGELICI, RJ TI ACETYLENE INSERTION REACTIONS OF THE C,S AND ETA-4 ISOMERS OF CP-STAR-IR(2,5-DIMETHYLTHIOPHENE) WITH MESCCSME AND MESCCME - FORMATION OF NOVEL CHELATED BICYCLOCARBENE COMPLEXES SO ORGANOMETALLICS LA English DT Note ID COORDINATION; SULFIDE AB The reactions of Cp*Ir(C,S-2,5-Me2T) (2) with the acetylenes MeSC = CSMe and MeSC = CMe give the bicyclocarbene insertion products 3 and 4. The same [GRAPHICS] products are obtained from the reactions of these acetylenes with Cp*Ir(eta(4)-2,5-Me2T) (1). The carbene-diene structure of 3 was established by an X-ray crystallographic study. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. NR 19 TC 25 Z9 25 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD FEB PY 1992 VL 11 IS 2 BP 992 EP 996 DI 10.1021/om00038a080 PG 5 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA HE298 UT WOS:A1992HE29800080 ER PT J AU MERKLE, KL WOLF, D AF MERKLE, KL WOLF, D TI LOW-ENERGY CONFIGURATIONS OF SYMMETRICAL AND ASYMMETRIC TILT GRAIN-BOUNDARIES SO PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES LA English DT Article ID RESOLUTION ELECTRON-MICROSCOPY; FCC METALS; DISSOCIATION; SIGMA-9; PLANES AB High-resolution electron-microscopy experiments are combined with computer simulations of <110BAR> tilt grain boundaries (GBs) in Au to investigate the preferred GB planes in SIGMA = 9 and SIGMA = 11 bicrystals. The energies calculated for a variety of symmetric and asymmetric GBs suggest that asymmetric GB-plane orientations are often preferred over symmetric ones. Experimentally it is found that symmetric and asymmetric GBs coexist for each misorientation, and that the observed atomic-scale facets are consistent with the computed energies. In accordance with earlier observations, it is suggested that a significant fraction of the GBs in polycrystalline materials may indeed be asymmetric. RP MERKLE, KL (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 34 TC 88 Z9 89 U1 2 U2 23 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0141-8610 J9 PHILOS MAG A JI Philos. Mag. A-Phys. Condens. Matter Struct. Defect Mech. Prop. PD FEB PY 1992 VL 65 IS 2 BP 513 EP 530 PG 18 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA HE451 UT WOS:A1992HE45100015 ER PT J AU KRESIN, VZ WOLF, SA DEUTSCHER, G AF KRESIN, VZ WOLF, SA DEUTSCHER, G TI THE EFFECT OF PHONON-MEDIATED CHARGE-TRANSFER AND INTERNAL PROXIMITY EFFECT ON THE PROPERTIES OF MULTIGAP CUPRATE SUPERCONDUCTORS SO PHYSICA C LA English DT Article ID ENERGY-GAP; TRANSITION-TEMPERATURE; OXIDE SUPERCONDUCTORS; STATE; TC; YBA2CU3O7; CONDUCTIVITY; RESISTIVITY; PARAMETERS; CRYSTAL AB The theoretical model capable of calculating the superconducting properties (e.g. T(c), energy gaps, etc) of materials such as Y1Ba2Cu3O7 which consist of two conducting subsystems (planes and chains) is developed. The system is characterized by two energies gaps. The interplay of two channels (phonon-mediated processes and the intrinsic proximity effect) inducing the superconducting state in the chains is studied. The proximity effect combined with the phonon-mediated channel appears to be favorable for superconductivity. The theory describes the effect of the oxygen ordering on T(c) and the induced gap and allows us to explain a number of experiments including the plateau in T(c) versus oxygen, the large residual microwave losses, zero-bias anomalies and the temperature dependence of the penetration depth. C1 USN,RES LAB,WASHINGTON,DC 20375. TEL AVIV UNIV,DEPT PHYS & ASTRON,IL-69978 TEL AVIV,ISRAEL. RP KRESIN, VZ (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. RI Wolf, Stuart/A-7513-2009 NR 33 TC 24 Z9 24 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD FEB 1 PY 1992 VL 191 IS 1-2 BP 9 EP 14 DI 10.1016/0921-4534(92)90624-L PG 6 WC Physics, Applied SC Physics GA HH408 UT WOS:A1992HH40800002 ER PT J AU DABROWSKI, B PENG, WM MELIM, V KIMBALL, CW PEI, SY RICHARDS, DR ZHENG, Y JORGENSEN, JD HINKS, DG MITCHELL, AW DUNLAP, BD AF DABROWSKI, B PENG, WM MELIM, V KIMBALL, CW PEI, SY RICHARDS, DR ZHENG, Y JORGENSEN, JD HINKS, DG MITCHELL, AW DUNLAP, BD TI STRUCTURAL AND SUPERCONDUCTING PROPERTIES OF ISOELECTRONIC SB-SUBSTITUTED BA1-XKXBIO3 SO PHYSICA C LA English DT Article ID O SYSTEM; TC AB Single phase samples of (Ba1-xKx) (Bi1-ySby)O3 have been synthesized over a limited compositional range using a two-step procedure: high-temperature firing in a low oxygen partial pressure followed by low-temperature oxygen annealing. For y > 0 samples are superconducting only in a simple cubic structure with T(c) gradually decreasing as y increases for fixed x. As in the case of potassium only (y = 0) substituted material, the highest T(c) is found in the compositional range adjacent to the structural phase transition into the lower symmetry nonsuperconducting phase. Mossbauer effect measurements indicate that Sb is close to +5 valent state with small mixed valent behavior which increases with Sb content. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP DABROWSKI, B (reprint author), NO ILLINOIS UNIV,DE KALB,IL 60115, USA. NR 18 TC 0 Z9 0 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD FEB 1 PY 1992 VL 191 IS 1-2 BP 151 EP 157 DI 10.1016/0921-4534(92)90641-O PG 7 WC Physics, Applied SC Physics GA HH408 UT WOS:A1992HH40800019 ER PT J AU ABRIKOSOV, AA KLEMM, RA AF ABRIKOSOV, AA KLEMM, RA TI THE DEPENDENCE OF DELTA AND TC ON HOPPING AND THE TEMPERATURE-VARIATION OF DELTA IN A LAYERED MODEL OF HTSC SO PHYSICA C LA English DT Article AB The dependence of T(c) and DELTA on the interlayer hopping energy t and the function DELTA(T) are calculated for the model proposed previously in ref. [1] consisting of alternating superconducting and normal layers with considerably different effective masses, with hopping between adjacent layers. No limitations on the value of t are imposed apart from t << omega(D). The ratio 2-DELTA(min)/T(c) can differ from the BCS value 3.52 in either direction. For sufficiently large values of t, the temperature dependence of DELTA-deviates markedly from the BCS curve. RP ABRIKOSOV, AA (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 6 TC 32 Z9 32 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD FEB 1 PY 1992 VL 191 IS 1-2 BP 224 EP 236 DI 10.1016/0921-4534(92)90652-S PG 13 WC Physics, Applied SC Physics GA HH408 UT WOS:A1992HH40800030 ER PT J AU TAKAHASHI, H JORGENSEN, JD HUNTER, BA HITTERMAN, RL PEI, SY IZUMI, F SHIMAKAWA, Y KUBO, Y MANAKO, T AF TAKAHASHI, H JORGENSEN, JD HUNTER, BA HITTERMAN, RL PEI, SY IZUMI, F SHIMAKAWA, Y KUBO, Y MANAKO, T TI ANOMALOUS BEHAVIOR OF THE PRESSURE-DEPENDENCE OF LATTICE-CONSTANTS IN TL2BA2CUO6+X SO PHYSICA C LA English DT Article ID PHASE-SEPARATION; CHARGE-TRANSFER; OXYGEN-CONTENT; TC; TEMPERATURE; DIFFRACTION; SUPERCONDUCTIVITY; POWDER; STATE AB The crystal structure of Tl2Ba2CuO6+x has been investigated as a function of pressure and temperature under hydrostatic conditions using neutron powder diffraction. The crystal structure at 0.609 GPa and 60 K depends systematically on the path in pressure-temperature space by which these condition are achieved. Applying pressure at room temperature and then cooling produces different changes in the structure than cooling first and then applying pressure. Our results support those of Sieburger and Schilling [1] who reported that the T(c) at high pressure for this compound depends markedly on whether the sample is pressurized at room temperature or low temperature. We speculate that this unusual behavior may be associated with differences in the mobility of interstitial oxygen defects between room temperature and 60 K and that applying pressure at room temperature changes the state of the sample through such processes as defect ordering, while changing the pressure at low temperature does not. C1 ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCONDUCT,ARGONNE,IL 60439. NATL INST RES INORGAN MAT,TSUKUBA,IBARAKI 305,JAPAN. NEC CORP LTD,FUNDAMENTAL RES LABS,TSUKUBA,IBARAKI 305,JAPAN. UNIV TOKYO,INST SOLID STATE PHYS,TOKYO 106,JAPAN. RP TAKAHASHI, H (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. RI KUBO, Yoshimi/H-2851-2011 NR 25 TC 24 Z9 24 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD FEB 1 PY 1992 VL 191 IS 1-2 BP 248 EP 254 DI 10.1016/0921-4534(92)90655-V PG 7 WC Physics, Applied SC Physics GA HH408 UT WOS:A1992HH40800033 ER PT J AU TIDJANI, ME GRONSKY, R AF TIDJANI, ME GRONSKY, R TI STRUCTURAL CHARACTERIZATION OF THE AG-YBA2CU3O7-X INTERFACE SO PHYSICA C LA English DT Article ID TRANSMISSION ELECTRON-MICROSCOPY; TO-CERAMIC SEALS; CONTACT RESISTANCE; METAL; SUPERCONDUCTORS; YBA2CU3O7-X; SPECIMENS; COMPOUND AB Silver contacts to the high critical temperature (T(c)) superconductor YBa2Cu3O7-x (YBCO) are characterized using high resolution transmission electron microscopy (HRTEM). Observations of the interfacial regions reveal that Ag bonds to YBCO without any intermediate phase formation but with a preferred orientation relationship, in which the close packed planes and directions of the metal are parallel to those of the superconductor. The formation of (111)Ag interfaces and facets are also strongly favored during deposition. The as-deposited Ag film exhibits a granular morphology and a high twin density, especially when the surface of YBCO is corrugated and structurally unstable. Annealing of the Ag-YBCO interface results in measurable grain growth and a decrease in the density of structural defects within the deposited Ag. At regions where the surface of YBCO is not flat, however, there is precipitation of isolated Ag-bearing particles. C1 UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. RP TIDJANI, ME (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720, USA. NR 24 TC 9 Z9 9 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD FEB 1 PY 1992 VL 191 IS 1-2 BP 260 EP 270 DI 10.1016/0921-4534(92)90657-X PG 11 WC Physics, Applied SC Physics GA HH408 UT WOS:A1992HH40800035 ER PT J AU DEISSLER, RJ FARMER, JD AF DEISSLER, RJ FARMER, JD TI DETERMINISTIC NOISE AMPLIFIERS SO PHYSICA D LA English DT Article ID CHAOTIC ATTRACTORS; SYSTEMS; DYNAMICS; EQUATION; FLOW AB Although we are accustomed to considering only overall stability properties of dynamical systems, local stability properties can also have a dramatic physical effect. Local instabilities in overall stable motion can cause otherwise imperceptible ambient noise to be amplified to macroscopic proportions. The result can be easily mistaken for deterministic chaos. We give measures for local instability and noise amplification in terms of the covariance matrix and local divergence rates and analyze several examples. An experimental test can be made by varying the external noise level; for sufficiently small amplitudes, the noisy response due to local instabilities scales linearly with the noise level, whereas noisy behavior due to deterministic chaos is largely unaffected. C1 UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,COMPLEX SYST GRP,LOS ALAMOS,NM 87545. NR 22 TC 30 Z9 31 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2789 J9 PHYSICA D JI Physica D PD FEB PY 1992 VL 55 IS 1-2 BP 155 EP 165 DI 10.1016/0167-2789(92)90194-R PG 11 WC Mathematics, Applied; Physics, Multidisciplinary; Physics, Mathematical SC Mathematics; Physics GA HF344 UT WOS:A1992HF34400011 ER PT J AU SPONG, DA CARRERAS, BA HEDRICK, CL DOMINGUEZ, N CHARLTON, LA CHRISTENSON, PJ LEBOEUF, JN AF SPONG, DA CARRERAS, BA HEDRICK, CL DOMINGUEZ, N CHARLTON, LA CHRISTENSON, PJ LEBOEUF, JN TI ALPHA DESTABILIZATION OF THE TAE MODE USING A REDUCED GYROFLUID MODEL WITH LANDAU CLOSURE SO PHYSICA SCRIPTA LA English DT Article; Proceedings Paper CT 2ND MEETING OF THE TECHNICAL COMMITTEE OF INTERNATIONAL ATOMIC ENERGY AGENCY : ALPHA PARTICLES IN FUSION RESEARCH CY JUN 10-14, 1991 CL ASPENAS, SWEDEN SP INT ATOM ENERGY AGCY, TECH COMM ID ALFVEN; INSTABILITY; WAVES AB A reduced MHD fluid model for the unstable toroidicity-induced shear Alfven eigenmode (TAE) is described. This consists of four coupled time evolution equations for the poloidal magnetic flux, toroidal component of vorticity, energetic particle density and parallel flow velocity, which are solved numerically using the three-dimensional initial value code FAR in toroidal geometry. The TAE mode is readily excited and exhibits similar scalings as have been predicted analytically. C1 UNIV MICHIGAN,DEPT NUCL ENGN,ANN ARBOR,MI 48109. RP SPONG, DA (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. RI Spong, Donald/C-6887-2012 OI Spong, Donald/0000-0003-2370-1873 NR 15 TC 8 Z9 8 U1 0 U2 0 PU ROYAL SWEDISH ACAD SCIENCES PI STOCKHOLM PA PUBL DEPT BOX 50005, S-104 05 STOCKHOLM, SWEDEN SN 0281-1847 J9 PHYS SCRIPTA JI Phys. Scr. PD FEB PY 1992 VL 45 IS 2 BP 159 EP 162 DI 10.1088/0031-8949/45/2/015 PG 4 WC Physics, Multidisciplinary SC Physics GA HG270 UT WOS:A1992HG27000016 ER PT J AU SEN, T MILOVICH, JL AF SEN, T MILOVICH, JL TI GEOMETRIC PHASES IN 2-LEVEL ATOMS EXCITED BY PULSES PROPAGATING WITHOUT LOSS SO PHYSICAL REVIEW A LA English DT Article ID SELF-INDUCED TRANSPARENCY; QUANTUM EVOLUTION; BERRYS PHASE; RESONANCE AB We consider the geometrical phases arising in the state vector of two-level atoms due to their interaction with a self-consistently generated classical electrical field propagating without loss through the atomic medium. Three conservation laws are shown to exist generally and are used to solve for the individual quantum amplitudes, phases, and the electric field. We calculate the geometrical phases in two situations: (a) where the atoms are initally in the ground state and (b) where the initial state is a coherent superposition of the ground and excited states. In both cases the geometrical phase is the Aharonov-Anandan phase resulting from the atomic state vector tracing out a closed curve on the projective Hilbert space-here the Bloch sphere. We show that geometric quantities associated with the curve on the Bloch sphere are directly related to physical observables. The solid angle subtended by the closed curve (shown to equal twice the geometric phase) is a measure of the maximum atomic inversion, while the speed with which the curve is traced is related to the energy uncertainty in the state. An experimental method to observe the total phase change in a two-level subsystem is outlined, using photon echoes in a three-level medium. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP SEN, T (reprint author), SUPERCONDUCTING SUPER COLLIDER LAB,MS-1042,2550 BECKLEYMEADE AVE,DALLAS,TX 75237, USA. NR 24 TC 5 Z9 5 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 FEB 1 PY 1992 VL 45 IS 3 BP 1371 EP 1388 DI 10.1103/PhysRevA.45.1371 PG 18 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HC995 UT WOS:A1992HC99500015 ER PT J AU MULLER, J BURGDORFER, J NOID, D AF MULLER, J BURGDORFER, J NOID, D TI TORUS QUANTIZATION OF SYMMETRICALLY EXCITED HELIUM SO PHYSICAL REVIEW A LA English DT Article ID N HYDROGENIC THRESHOLDS; 2-ELECTRON ATOMS; ENERGY-LEVELS; WANNIER RIDGE; H ION; STATES; CLASSIFICATION; RESONANCES AB The recent discovery by Richter and Wintgen [J. Phys. B 23, L197 (1990)] that the classical helium atom is not globally ergodic has stimulated renewed interest in its semiclassical quantization. The Einstein-Brillouin-Keller quantization of Kolmogorov-Arnold-Moser tori around stable periodic orbits becomes locally possible in a selected region of phase space. Using a hyperspherical representation we have found a dynamically confining potential allowing for a stable motion near the Wannier ridge. The resulting semiclassical eigenenergies provide a test for full quantum calculations in the limit of very high quantum numbers. The relations to frequently used group-theoretical classifications for doubly excited states and to the periodic-orbit quantization of the chaotic portion of the phase space are discussed. The extrapolation of the semiclassical quantization to low-lying states give remarkably accurate estimates for the energies of all symmetric L = 0 states of helium. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP MULLER, J (reprint author), UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996, USA. NR 45 TC 50 Z9 50 U1 0 U2 0 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 FEB 1 PY 1992 VL 45 IS 3 BP 1471 EP 1478 DI 10.1103/PhysRevA.45.1471 PG 8 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HC995 UT WOS:A1992HC99500026 ER PT J AU MEI, J DAVENPORT, JW AF MEI, J DAVENPORT, JW TI 1ST-ORDER PERTURBATION CALCULATIONS FOR TRANSITION-METAL ATOMS AND IONS SO PHYSICAL REVIEW A LA English DT Article ID DENSITY-FUNCTIONAL THEORY; ENERGY; APPROXIMATIONS AB We have calculated the total energy and s-d promotion energies of 3d-transition-metal atoms using a common set of orbitals but various expressions for the energy. These include Hartree-Fock (HF), local-spin-density-approximation (LSDA), and self-interaction-corrected (SIC) LSDA expressions. The orbitals were generated from a self-consistent, spherically averaged, local-density calculation. The results using the HF expression are in remarkably good agreement with self-consistent Hartree-Fock calculations both for the total energy and for the HF eigenvalues. Further, the LSDA underestimates the total correlation energy by roughly 30 eV, while the SIC calculation overestimates the correlation energy in calcium by approximately 15 eV. C1 BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. RP MEI, J (reprint author), SUNY STONY BROOK, DEPT PHYS, STONY BROOK, NY 11794 USA. NR 28 TC 0 Z9 0 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 EI 1094-1622 J9 PHYS REV A JI Phys. Rev. A PD FEB 1 PY 1992 VL 45 IS 3 BP 1497 EP 1501 DI 10.1103/PhysRevA.45.1497 PG 5 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HC995 UT WOS:A1992HC99500029 ER PT J AU DELLWO, J LIU, Y PEGG, DJ ALTON, GD AF DELLWO, J LIU, Y PEGG, DJ ALTON, GD TI NEAR-THRESHOLD PHOTODETACHMENT OF THE LI- ION SO PHYSICAL REVIEW A LA English DT Article ID ELECTRON-AFFINITIES; STATES; PROPAGATOR; LITHIUM; NA AB The method of threshold-photodetachment spectroscopy has been used to measure the electron affinity of Li. Changes in the partial cross sections for the resolved h-nu + Li-(2(1)S) --> Li(2(2)S) + e-(epsilon-p) (2S-epsilon-p) and h-nu + Li-(2(1)S) --> Li(2(2)P) + e-(epsilon-s) (2P-epsilon-s) channels were separately investigated in the vicinity of the 2(2)P threshold. The near-threshold data in the 2P-epsilon-s channel were fitted to a Wigner law to determine a threshold photon energy of 19 884.8 +/- 1.6 cm-1. An electron affinity of 4980.9 +/- 1.6 cm-1 (617.6 +/- 0.2 meV) is obtained upon subtraction of the well-known 2(2)P excitation energy. The position of the Wigner cusp in the 2S-epsilon-p channel was measured to be 19 882.4 +/- 4.0 cm-1, in agreement with the more precise 2P-epsilon-s-channel threshold energy. C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. RP DELLWO, J (reprint author), UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996, USA. NR 27 TC 30 Z9 30 U1 0 U2 0 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 FEB 1 PY 1992 VL 45 IS 3 BP 1544 EP 1547 DI 10.1103/PhysRevA.45.1544 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HC995 UT WOS:A1992HC99500035 ER PT J AU CARTWRIGHT, DC CSANAK, G TRAJMAR, S REGISTER, DF AF CARTWRIGHT, DC CSANAK, G TRAJMAR, S REGISTER, DF TI ELECTRON-IMPACT EXCITATION OF THE N 1P LEVELS OF HELIUM - THEORY AND EXPERIMENT SO PHYSICAL REVIEW A LA English DT Article ID DIFFERENTIAL CROSS-SECTIONS; ANGULAR-CORRELATION PARAMETERS; MANY-BODY THEORY; EXPERIMENTAL-THEORETICAL COMPARISONS; DISTORTED-WAVE APPROXIMATION; GROUND-STATE; POLARIZATION FRACTIONS; INTERMEDIATE ENERGIES; SCATTERING; ATOMS AB New experimental electron-energy-loss data have been used to extract differential and integral cross sections for excitation of the 2(1)P level, and for the overlapping (3(1)P,3(1)D,3(3)D) levels of helium, at 30-, 50-, and 100-eV incident electron energies. First-order many-body theory (FOMBT) has been used to calculate the differential and integral cross sections for excitation of the n 1P (n = 2,...,6) levels of helium by electron impact, for incident electron energies from threshold to 500 eV. Detailed comparisons between these two new sets of data are made as well as comparisons with appropriate published experimental and theoretical results. A simple scaling relationship is derived from the FOMBT results for n = 2,...,6 that provides differential and integral cross sections for all symmetry final levels of helium with n greater-than-or-equal-to 6. C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. RP CARTWRIGHT, DC (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. NR 66 TC 68 Z9 68 U1 1 U2 5 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 FEB 1 PY 1992 VL 45 IS 3 BP 1602 EP 1624 DI 10.1103/PhysRevA.45.1602 PG 23 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HC995 UT WOS:A1992HC99500044 ER PT J AU CSANAK, G CARTWRIGHT, DC TRAJMAR, S AF CSANAK, G CARTWRIGHT, DC TRAJMAR, S TI MAGNETIC-SUBLEVEL CROSS-SECTIONS FOR EXCITATION OF THE N 1P LEVELS OF HELIUM BY ELECTRON-IMPACT SO PHYSICAL REVIEW A LA English DT Article ID PHOTON ANGULAR-CORRELATIONS; EXPERIMENTAL-THEORETICAL COMPARISONS; 21P STATE; ATOMIC ORIENTATION; COLLISIONS; SCATTERING; ALIGNMENT; AMPLITUDES; COINCIDENCE; HE AB First-order many-body theory has been used to calculate collision-frame magnetic-sublevel differential cross sections for electron-impact excitation of the n 1P (n = 2,3,4,5,6) levels of helium for electrons with incident energy in the 25-500-eV range. By combining results from electron-impact differential-cross-section measurements and electron-photon coincidence measurements, experimental magnetic-sublevel cross sections have also been derived for the excitation of the 2 1P and 3 1P levels. The theory predicts a pronounced minimum for the M = O magnetic-sublevel differential cross section for incident electron energies around 30 eV. Our theoretical results are compared to the experimental data and some other theoretical results. C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. RP CSANAK, G (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. NR 41 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 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD FEB 1 PY 1992 VL 45 IS 3 BP 1625 EP 1643 DI 10.1103/PhysRevA.45.1625 PG 19 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HC995 UT WOS:A1992HC99500045 ER PT J AU CHEN, MH AF CHEN, MH TI EFFECT OF INTERMEDIATE COUPLING ON ANGULAR-DISTRIBUTION OF AUGER ELECTRONS SO PHYSICAL REVIEW A LA English DT Article ID SPIN POLARIZATION; IMPACT IONIZATION; SHELL; ATOMS; IONS AB The Auger decay anisotropy parameter alpha(2) of angular distribution has been calculated for the M45-NN transitions in Kr and M45-NN and N45-OO transitions in Xe atoms using the multiconfiguration Dirac-Fock model in intermediate coupling with configuration interaction. For transitions involving many contributing partial waves and leading to the strongly mixed final ionic states in intermediate coupling, the effects of relativity and spin-orbit interaction are found to be quite important for the calculations of alpha(2) values. The existing discrepancies between theory and experiment are largely removed by the present relativistic intermediate coupling calculations. RP CHEN, MH (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DIV HIGH TEMP PHYS,LIVERMORE,CA 94550, USA. NR 21 TC 37 Z9 37 U1 0 U2 0 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 FEB 1 PY 1992 VL 45 IS 3 BP 1684 EP 1689 DI 10.1103/PhysRevA.45.1684 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HC995 UT WOS:A1992HC99500049 ER PT J AU MILONNI, PW AF MILONNI, PW TI COMPLETE KELDYSH THEORY AND ITS LIMITING CASES - COMMENT SO PHYSICAL REVIEW A LA English DT Letter ID ABOVE-THRESHOLD IONIZATION; APPROXIMATION; FIELD AB Reiss [Phys. Rev. A 42, 1476 (1990)] has argued that Volkov states exist unambiguously only in relativistic theory, and that A2 must be retained in strong-field theory even after the nonrelativistic and dipole approximations are made. We show that these arguments and their conclusions are incorrect. RP MILONNI, PW (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 14 TC 7 Z9 7 U1 1 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 FEB 1 PY 1992 VL 45 IS 3 BP 2138 EP 2139 DI 10.1103/PhysRevA.45.2138 PG 2 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HC995 UT WOS:A1992HC99500116 ER PT J AU SCHNEIDER, MB KNAPP, DA CHEN, MH SCOFIELD, JH BEIERSDORFER, P BENNETT, CL HENDERSON, JR MARRS, RE LEVINE, MA AF SCHNEIDER, MB KNAPP, DA CHEN, MH SCOFIELD, JH BEIERSDORFER, P BENNETT, CL HENDERSON, JR MARRS, RE LEVINE, MA TI MEASUREMENT OF THE LMM DIELECTRONIC RECOMBINATION RESONANCES OF NEON-LIKE GOLD SO PHYSICAL REVIEW A LA English DT Note ID CROSS-SECTIONS; IONS; EXCITATION; AUGER; RATES AB The LMM dielectronic recombination resonances of a neonlike ion (Au69+) have been observed. The ions were produced and held in an electron-beam ion trap. The intensity of the n = 3 --> 2 x rays resulting from dielectronic recombination was measured as a function of electron-beam energy with sufficient resolution to distinguish the structure of the LMM resonances. The measured resonance strengths for LMM resonances with a 2p3/2(-1) core are in good agreement with theoretical predictions, but there is some disagreement for the 2p1/2(-1) and 2s1/2(-1) core configurations. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP SCHNEIDER, MB (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,POB 5508,LIVERMORE,CA 94550, USA. NR 16 TC 32 Z9 33 U1 2 U2 4 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 FEB 1 PY 1992 VL 45 IS 3 BP R1291 EP R1294 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HC995 UT WOS:A1992HC99500002 ER PT J AU MORIARTY, JA AF MORIARTY, JA TI ULTRAHIGH-PRESSURE STRUCTURAL PHASE-TRANSITIONS IN CR, MO, AND W SO PHYSICAL REVIEW B LA English DT Article ID X-RAY-DIFFRACTION; INTERATOMIC POTENTIALS; STATIC COMPRESSION; CRYSTAL-STRUCTURES; METALS; EQUATION; STABILITY; GPA; SOLIDS; RHENIUM AB On the basis of first-principles total-energy calculations, we predict the ultrahigh-pressure destabilization of the bcc structure in the group-VIB elements Cr, Mo, and W through a bcc --> hcp phase transition at pressures of about 7.0, 4.2, and 12.5 Mbar, respectively. In Mo and W, a subsequent hcp --> fcc transition is also predicted at about 6.2 and 14.4 Mbar, respectively. The overall driving mechanism for these transitions is a continuous sp --> d transfer of electrons upon compression, although other factors play an important quantitative role, especially the hard-core-like interaction between the large cores of these elements, which disfavors the bcc structure and serves to lower the bcc --> hcp transition pressures. While the actual predicted transition pressures are sensitive to the details of the calculations, the qualitative trends are not, and the bcc --> hcp transition in Mo should be within reach of static diamond-anvil-cell experiments. In this regard, we have also calculated accurate 300-K isotherms for bcc Cr, Mo, and W valid up to the 5-6-Mbar pressure range. RP UNIV CALIF LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. NR 47 TC 73 Z9 77 U1 1 U2 12 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 FEB 1 PY 1992 VL 45 IS 5 BP 2004 EP 2014 DI 10.1103/PhysRevB.45.2004 PG 11 WC Physics, Condensed Matter SC Physics GA HC835 UT WOS:A1992HC83500005 ER PT J AU SHIELD, JE HOPPE, C MCCALLUM, RW GOLDMAN, AI KELTON, KF GIBBONS, PC AF SHIELD, JE HOPPE, C MCCALLUM, RW GOLDMAN, AI KELTON, KF GIBBONS, PC TI ICOSAHEDRAL PHASE STABILITIES IN AL-CU-RU ALLOYS SO PHYSICAL REVIEW B LA English DT Article ID QUASICRYSTAL AB By examining a wide region of the Al-Cu-Ru phase diagram, a thorough analysis of the compositional and thermal stability of the icosahedral phase has been completed. The primary solidification product of rapid solidification was a topologically and chemically disordered icosahedral phase with an extensive compositional region. Crystallization through exothermic events of the as-solidified materials produced crystalline phases, without the formation of the face-centered-icosahedral (FCI) phase. However, the FCI phase does form at higher temperatures through an endothermic reaction, indicating that it is a stable phase of the system, but only at elevated temperatures. Of the alloys studied, the FCI phase field was found to encompass Al65Cu23Ru12, Al65Cu20Ru15, Al70Cu20Ru10, and Al70Cu15Ru15. The transformation to the FCI phase involves an intermediate approximant phase that is very similar to the FCI structure. Also, a cubic approximant containing atomic arrangements with local icosahedral symmetry similar to alpha-Al Mn Si was determined to exist near the FCI phase field. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT MAT SCI & ENGN,AMES,IA 50011. WASHINGTON UNIV,DEPT PHYS,ST LOUIS,MO 63130. RP SHIELD, JE (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 25 TC 21 Z9 21 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 5 BP 2063 EP 2072 DI 10.1103/PhysRevB.45.2063 PG 10 WC Physics, Condensed Matter SC Physics GA HC835 UT WOS:A1992HC83500013 ER PT J AU GOLDSTEIN, L AF GOLDSTEIN, L TI SPIN-ORDERING TRANSFORMATION IN LOW-PRESSURE SOLID HE-3 SO PHYSICAL REVIEW B LA English DT Article ID STATIC MAGNETIZATION; TEMPERATURE AB Currently available equilibrium thermodynamic data will be used to obtain approximate phase-boundary pressure values p0(T) in the pressure-temperature plane of solid He-3 in its low-pressure and low-temperature phases. In contrast with the earlier determined spin-ordering molar-entropy change of about R/3, at the triple point at melting, the changes in pressure, temperature, and molar volume are quite small. In a constant-volume transformation, near the triple point, the pressure change or width across the mixed-phase region is about 10 millibars. The temperature width is in the microkelvin range. In constant-temperature and constant-pressure phase changes the estimated volume width is about 10(-3) cm3/mol. Temperature derivatives of pressure and molar volume in the mixed-phase regions are quite large. As a consequence, the excess constant-volume heat capacities in the mixed phase may reach very large values. The required experimental resolving powers for accurate measurements of very small transformation temperatures and molar volumes as well as of very large mixed-phase heat capacities appear to be barely accessible at the present time. RP GOLDSTEIN, L (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. NR 24 TC 0 Z9 0 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 5 BP 2097 EP 2104 DI 10.1103/PhysRevB.45.2097 PG 8 WC Physics, Condensed Matter SC Physics GA HC835 UT WOS:A1992HC83500018 ER PT J AU QIU, ZQ MATTSON, JE SOWERS, CH WELP, U BADER, SD TANG, H WALKER, JC AF QIU, ZQ MATTSON, JE SOWERS, CH WELP, U BADER, SD TANG, H WALKER, JC TI TEMPERATURE-DEPENDENCE OF THE MAGNETIZATION OF SUPERLATTICES WITH VARIABLE INTERLAYER MAGNETIC COUPLINGS SO PHYSICAL REVIEW B LA English DT Article ID MULTILAYERED STRUCTURES; SURFACE MAGNETIZATION; FE; EXCHANGE; FILMS; MAGNETORESISTANCE; FERROMAGNET; FE/CR AB A Heisenberg model is solved for the coupling of two-dimensional ferromagnetic layers separated by nonmagnetic spacer layers in a superlattice configuration. The cases of noncoupling and ferromagnetic and anti-ferromagnetic interlayer couplings, are solved for the temperature dependence of the magnetization at low temperature; the results yield linear, T3/2 and T2 power laws, respectively. Experimental realization of the coupling cases was then sought. Three-sputtered Fe/Cr superlattices with 10 angstrom Fe layers and Cr-layer thicknesses of 100, 20, and 10 angstrom were chosen to span the three cases, respectively. Superconducting-quantum-interference-device magnetometry yields linear and T3/2 behavior for the first two cases. Mossbauer spectroscopy in zero field indicates an approximately T2 behavior for the antiferromagnetically coupled sample. The results are discussed and related to recent magnetotransport work. C1 JOHNS HOPKINS UNIV,DEPT PHYS,BALTIMORE,MD 21218. RP QIU, ZQ (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. RI Bader, Samuel/A-2995-2013; Qiu, Zi Qiang/O-4421-2016 OI Qiu, Zi Qiang/0000-0003-0680-0714 NR 30 TC 29 Z9 30 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 5 BP 2252 EP 2257 DI 10.1103/PhysRevB.45.2252 PG 6 WC Physics, Condensed Matter SC Physics GA HC835 UT WOS:A1992HC83500037 ER PT J AU TORIKACHVILI, MS REBELSKY, L MOTOYA, K SHAPIRO, SM DALICHAOUCH, Y MAPLE, MB AF TORIKACHVILI, MS REBELSKY, L MOTOYA, K SHAPIRO, SM DALICHAOUCH, Y MAPLE, MB TI NEUTRON-SCATTERING STUDY OF THE FERROMAGNETIC HEAVY-FERMION COMPOUND URU1.2RE0.8SI2 SO PHYSICAL REVIEW B LA English DT Article ID URU2SI2; SYSTEMS AB We have performed a neutron-scattering investigation of the heavy-fermion compound Uru1.2Re0.8Si2, in order to verify the existence of long-range ferromagnetic order and characterize the properties of the ordered phase. This study consisted of measurements of elastic scattering using polarized and unpolarized neutrons, measurements of low-angle critical scattering, and the determination of the temperature (T) dependence of the order parameter. The critical scattering measurements at wave vector Q = 0.08 angstrom-1 revealed a sharp peak at T almost-equal-to 30 K, which was taken as the Curie temperature T(C). The value of the ordered moment estimated from the elastic-scattering data is almost-equal-to 0.49-mu(B) at 10 K, which is in good agreement with the value of 0.46-mu(B) obtained previously from magnetization measurements. A polarized-neutron beam elastically scattered off the [112] planes was only partially depolarized upon traveling through the sample. The partial depolarization of the beam suggests that URu1.2Re0.8Si2 is either a weak ferromagnet, or that the domains are extremely small. Extensive short-range correlations precede the onset of long-range order. Preliminary results of inelastic scattering are discussed. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. UNIV CALIF SAN DIEGO,DEPT PHYS,SAN DIEGO,CA 92103. UNIV CALIF SAN DIEGO,INST PURE & APPL PHYS SCI,SAN DIEGO,CA 92103. SAITAMA UNIV,DEPT PHYS,URAWA,SAITAMA 338,JAPAN. RP TORIKACHVILI, MS (reprint author), SAN DIEGO STATE UNIV,DEPT PHYS,SAN DIEGO,CA 92182, USA. NR 20 TC 10 Z9 10 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 5 BP 2262 EP 2266 DI 10.1103/PhysRevB.45.2262 PG 5 WC Physics, Condensed Matter SC Physics GA HC835 UT WOS:A1992HC83500039 ER PT J AU CAI, ZX WELCH, DO AF CAI, ZX WELCH, DO TI SIMULATION STUDY OF THE CRITICAL CURRENT-DENSITY OF YBA2CU3O7 CERAMICS SO PHYSICAL REVIEW B LA English DT Article ID MICROSTRUCTURE; MODELS; ARRAYS; FILMS AB A two-dimensional Josephson-junction-array model is used to study the effect of grain boundaries on the critical current density of YBa2Cu3O7 superconducting ceramics. The model represents a network of superconducting grains with a distribution of tilt angles-theta. Each grain boundary has a critical current density J(c)(theta) and normal-state resistance R(theta). The current-voltage characteristics are calculated numerically for different tilt-angle distributions. The scaling law and statistics of extremes, introduced by Duxbury, Beale, and Leath for general breakdown behavior, based on the most critical defect (normal region) in the network, are tested and found to be accurate for the predicted critical-current distribution of random samples. When the applied current is larger than but close to its critical value, there is a periodic V(t) with discrete power spectra. When the applied current gets larger, chaotic behavior appears with nearly continuous power spectra. RP CAI, ZX (reprint author), BROOKHAVEN NATL LAB, DEPT APPL SCI, UPTON, NY 11973 USA. NR 17 TC 13 Z9 14 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 5 BP 2385 EP 2390 DI 10.1103/PhysRevB.45.2385 PG 6 WC Physics, Condensed Matter SC Physics GA HC835 UT WOS:A1992HC83500054 ER PT J AU DELEON, JM CONRADSON, SD BATISTIC, I BISHOP, AR RAISTRICK, ID ARONSON, MC GARZON, FH AF DELEON, JM CONRADSON, SD BATISTIC, I BISHOP, AR RAISTRICK, ID ARONSON, MC GARZON, FH TI AXIAL OXYGEN-CENTERED LATTICE INSTABILITIES IN YBA2CU3O7 - AN APPLICATION OF THE ANALYSIS OF EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE IN ANHARMONIC SYSTEMS SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TC SUPERCONDUCTIVITY; TEMPERATURE-DEPENDENCE; SPECTROSCOPY; DIFFRACTION; SCATTERING; DYNAMICS; EXAFS AB Analysis of polarized copper K-edge extended x-ray absorption fine-structure (EXAFS) measurements on YBa2Cu3O7 for temperatures 10 less-than-or-equal-to T(nom) less-than-or-equal-to 105 K indicates that the axial oxygen moves in a double-well potential which softens within a fluctuation region associated with the onset of superconductivity in this material. This fluctuation follows from the coupling between the phonons derived from this double-well potential and the superconducting order parameter. The advantages of EXAFS compared to crystallographic measurements in discerning these aspects of the local structure are discussed. Metrical parameters and the characteristics of the potential are determined by curve fits of the EXAFS. This method is based on the calculation of radial distribution functions from selected model potentials, the forms of which are determined along with the absorber-scatterer distance, scatterer type, and number, by optimization of fits of the experimental data with the EXAFS calculated from these parameters. Unlike perturbative treatments, this approach is ideally suited for highly anharmonic systems because the putative potential can be a very close approximation to the real one and it also offers the advantage of providing dynamical information not available through perturbative treatments. C1 UNIV CALIF LOS ALAMOS SCI LAB,THEORET CONDENSED MATTER PHYS GRP,LOS ALAMOS,NM 87545. UNIV MICHIGAN,RANDALL LAB PHYS,ANN ARBOR,MI 48109. RP DELEON, JM (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,ELECTR RES GRP,LOS ALAMOS,NM 87545, USA. NR 57 TC 88 Z9 88 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 5 BP 2447 EP 2457 DI 10.1103/PhysRevB.45.2447 PG 11 WC Physics, Condensed Matter SC Physics GA HC835 UT WOS:A1992HC83500062 ER PT J AU WANG, Y RAO, AM ZHANG, JG BI, XX EKLUND, PC DRESSELHAUS, MS NGUYEN, PP MOODERA, JS DRESSELHAUS, G RADOUSKY, HB GLASS, RS FLUSS, MJ LIU, JZ AF WANG, Y RAO, AM ZHANG, JG BI, XX EKLUND, PC DRESSELHAUS, MS NGUYEN, PP MOODERA, JS DRESSELHAUS, G RADOUSKY, HB GLASS, RS FLUSS, MJ LIU, JZ TI AB-PLANE OPTICAL-PROPERTIES OF YBA2CU3O7-DELTA-BRY SINGLE-CRYSTALS SO PHYSICAL REVIEW B LA English DT Note ID FAR-INFRARED-SPECTROSCOPY; YBA2CU3O6; SUPERCONDUCTIVITY; PHONONS AB Room temperature infrared- and optical-spectroscopic measurements are reported on brominated YBa2Cu3O6.2 single-crystal samples. Incorporation of bromine in the lattice was observed in both Auger electron and infrared-spectroscopy experiments but the exact lattice site for bromine dopant atoms remains unknown. Five of the six in-plane infrared-active E(u) phonon modes were observed in YBa2Cu3O6.2Bry samples and phonon frequency softening was observed for the 591-cm-1 phonon [Cu(2)-O(2) in-plane stretch] mode. The frequency-dependent optical conductivity sigma(omega) was obtained from the Kramers-Kronig transformation of the near-normal-incidence reflectance R(omega) measurements, and the resulting sigma(omega) showed the presence of a mid-infrared band (centered at approximately 2500 cm-1) in YBa2Cu3O6.2Bry. C1 MIT,DEPT PHYS,CAMBRIDGE,MA 02139. MIT,FRANCIS BITTER NATL MAGNET LAB,CAMBRIDGE,MA 02139. MIT,DEPT ELECT ENGN & COMP SCI,CAMBRIDGE,MA 02139. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616. RP WANG, Y (reprint author), UNIV KENTUCKY,DEPT PHYS,LEXINGTON,KY 40506, USA. NR 12 TC 9 Z9 10 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 5 BP 2523 EP 2526 DI 10.1103/PhysRevB.45.2523 PG 4 WC Physics, Condensed Matter SC Physics GA HC835 UT WOS:A1992HC83500079 ER PT J AU WEI, SH FERREIRA, LG ZUNGER, A AF WEI, SH FERREIRA, LG ZUNGER, A TI 1ST-PRINCIPLES CALCULATION OF THE ORDER-DISORDER TRANSITION IN CHALCOPYRITE SEMICONDUCTORS SO PHYSICAL REVIEW B LA English DT Note ID TETRAHEDRAL SEMICONDUCTORS; PHASE-TRANSITION; ALLOYS; BEHAVIOR; DIAGRAMS AB We describe the polymorphic order-disorder transition in the chalcopyrite-type semiconductor Cu0.5In0.5Se through a Monte Carlo simulation of a generalized Ising Hamiltonian whose interaction energies are determined from ab initio total-energy calculations. The calculated transition temperature (T(c) = 1125 +/- 20 K) compares well with experiment (T(c) = 1083 K). Unlike the analogous ordering in isovalent III-V alloys, we find that the transition is dominated by electronic compensation between donor and acceptor states, leading to strong correlations in the disordered phase, and a decrease in the optical band gap upon disordering. RP WEI, SH (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. NR 29 TC 69 Z9 69 U1 1 U2 9 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 5 BP 2533 EP 2536 DI 10.1103/PhysRevB.45.2533 PG 4 WC Physics, Condensed Matter SC Physics GA HC835 UT WOS:A1992HC83500083 ER PT J AU BULAEVSKII, LN CLEM, JR GLAZMAN, LI MALOZEMOFF, AP AF BULAEVSKII, LN CLEM, JR GLAZMAN, LI MALOZEMOFF, AP TI MODEL FOR THE LOW-TEMPERATURE TRANSPORT OF BI-BASED HIGH-TEMPERATURE SUPERCONDUCTING TAPES SO PHYSICAL REVIEW B LA English DT Note ID CRITICAL CURRENTS AB A grain-structure model is used to obtain the low-temperature transport properties of polycrystalline Bi-based high-temperature superconducting tapes, including the magnetic-field-dependent critical current. The grain structure is regarded as resembling a brick wall, such that the net horizontal super-current passes from brick to brick chiefly through the horizontal junctions between bricks. A high-field critical-current plateau is predicted, assuming inhomogeneous Josephson junctions between highly anisotropic superconducting grains. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. PN LEBEDEV PHYS INST,MOSCOW,USSR. UNIV MINNESOTA,INST THEORET PHYS,MINNEAPOLIS,MN 55455. AMER SUPERCONDUCTOR CORP,WATERTOWN,MA 02172. RP BULAEVSKII, LN (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 13 TC 230 Z9 231 U1 0 U2 12 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 5 BP 2545 EP 2548 DI 10.1103/PhysRevB.45.2545 PG 4 WC Physics, Condensed Matter SC Physics GA HC835 UT WOS:A1992HC83500086 ER PT J AU KOTZ, AL KLEIN, MV LEE, WC GIAPINTZAKIS, J GINSBERG, DM VEAL, BW AF KOTZ, AL KLEIN, MV LEE, WC GIAPINTZAKIS, J GINSBERG, DM VEAL, BW TI ANISOTROPY OF THE OPTICAL DIELECTRIC FUNCTION IN THE AB PLANE FOR YBA2CU3O7-DELTA SO PHYSICAL REVIEW B LA English DT Note ID OXYGEN-DEFICIENCY; CRYSTALS AB We report ellipsometric measurements from surfaces of three single-crystal samples of YBa2Cu3O7-delta. Two of the samples were untwinned with T(c) = 90 and 66 K. The third sample was a tetragonal single crystal with low oxygen content (delta approximately 0.9). We used solutions for epsilon(c) obtained from measurements on two faces of thick, single-crystal, twinned samples to solve for the other two components of the dielectric tensor (epsilon(a) and epsilon(b)). We examine anisotropy in the ab plane and observe unexplained polarization of several peaks, in the middle range of oxygen content. Most notably, we observe a b-polarized feature at 4.16 eV and an a-polarized feature at 4.59 eV for T(c) = 66 K, which we propose to be a splitting of the 4.03-eV peak observed in the insulator. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP KOTZ, AL (reprint author), UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801, USA. NR 17 TC 25 Z9 25 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 5 BP 2577 EP 2580 DI 10.1103/PhysRevB.45.2577 PG 4 WC Physics, Condensed Matter SC Physics GA HC835 UT WOS:A1992HC83500094 ER PT J AU KROL, A MING, ZH KAO, YH NUCKER, N ROTH, G FINK, J SMITH, GC PARK, KT YU, JJ FREEMAN, AJ ERBAND, A MULLERVOGT, G KARPINSKI, J KALDIS, E SCHONMANN, K AF KROL, A MING, ZH KAO, YH NUCKER, N ROTH, G FINK, J SMITH, GC PARK, KT YU, JJ FREEMAN, AJ ERBAND, A MULLERVOGT, G KARPINSKI, J KALDIS, E SCHONMANN, K TI HOLE STATES IN CUO2 PLANES AND CU-O CHAINS OF YBA2CU3O7 AND YBA2CU4O8 PROBED BY SOFT-X-RAY ABSORPTION-SPECTROSCOPY SO PHYSICAL REVIEW B LA English DT Note ID ELECTRONIC-STRUCTURE; SUPERCONDUCTOR; PHOTOEMISSION; PRESSURE; SPECTRA; DENSITY; FIELD AB The symmetry and density of unoccupied states of twin-free YBa2Cu3O7 and YBa2Cu4O8 single crystals have been investigated by orientation-dependent x-ray absorption spectroscopy at the O 1s edge, using a bulk-sensitive fluorescence-yield-detection method. In conjunction with earlier results obtained by electron-energy-loss spectroscopy, the relative density of unoccupied states for different oxygen sites has been derived. Comparison with local-density energy-band-structure calculations shows reasonable agreement with the experimental results. C1 KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH,INST NUKL FESTKORPERPHYS,W-7500 KARLSRUHE 1,GERMANY. BROOKHAVEN NATL LAB,UPTON,NY 11973. NORTHWESTERN UNIV,DEPT PHYS,EVANSTON,IL 60208. UNIV KARLSRUHE,INST KRISTALLCHEM,W-7500 KARLSRUHE,GERMANY. SWISS FED INST TECHNOL,FESTKORPERPHYS LAB,CH-8093 ZURICH,SWITZERLAND. WALTER MEISSNER INST,W-8046 GARCHING,GERMANY. RP KROL, A (reprint author), SUNY BUFFALO,DEPT PHYS,BUFFALO,NY 14260, USA. RI Fink, Joerg/A-6003-2012 NR 25 TC 58 Z9 58 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 5 BP 2581 EP 2584 DI 10.1103/PhysRevB.45.2581 PG 4 WC Physics, Condensed Matter SC Physics GA HC835 UT WOS:A1992HC83500095 ER PT J AU TAN, ZQ HEALD, SM CHEONG, SW COOPER, AS BUDNICK, JI AF TAN, ZQ HEALD, SM CHEONG, SW COOPER, AS BUDNICK, JI TI RARE-EARTH VALENCE AND DOPING IN T-PHASE, T'-PHASE, AND T-STAR-PHASE R2CUO4(R = RARE-EARTHS) SO PHYSICAL REVIEW B LA English DT Note ID X-RAY ABSORPTION; SUPERCONDUCTIVITY; ND; PEROVSKITES; ELECTRON; SYSTEM; 30-K; CEO2; PRO2; GD AB Charge-carrier doping strongly affects the magnetic, transport, and superconducting properties of the T-, T'-, and T*-phase R2CuO4 compounds (R = rare earths). The nature of doping and doping level depend not only on the heterovalent cation substitution and oxygen stoichiometry but also on the rare-earth valence. We have studied the valence of various rare earths in the R2CuO4 materials using x-ray-absorption spectroscopy. We found that Ce is tetravalent in both T'-phase Nd2-xCexCuO4 and T*-phase Pr2-x-yCexSryCuO4. Pr is trivalent in the T and T' structures. In the T* structure, both Pr and Tb have an average valence greater than 3+, very likely arising from an inhomogeneous mixture of trivalent and tetravalent ions, and the latter reside at the eightfold-oxygen-coordinated position. Other rare earths are trivalent in the T, T', and T* phases. C1 AT&T BELL LABS,MURRAY HILL,NJ 07974. UNIV CONNECTICUT,DEPT PHYS,STORRS,CT 06269. RP TAN, ZQ (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 23 TC 19 Z9 19 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 5 BP 2593 EP 2596 DI 10.1103/PhysRevB.45.2593 PG 4 WC Physics, Condensed Matter SC Physics GA HC835 UT WOS:A1992HC83500098 ER PT J AU BENEDEK, R YANG, LH WOODWARD, C MIN, BI AF BENEDEK, R YANG, LH WOODWARD, C MIN, BI TI FORMATION ENERGY AND LATTICE-RELAXATION FOR POINT-DEFECTS IN LI AND AL SO PHYSICAL REVIEW B LA English DT Article ID NORM-CONSERVING PSEUDOPOTENTIALS; ELECTRONIC-STRUCTURE CALCULATION; VACANCY FORMATION ENERGIES; PSEUDO-ATOM CALCULATION; ALKALI-METALS LI; MOLECULAR-DYNAMICS; ALUMINUM; ENERGETICS; SOLIDS; NA AB Calculations were performed for both a vacancy and an Al solute atom in bcc Li and for a vacancy in fcc Al. The purpose of this work was (i) to test optimization algorithms that allow a unified determination of ground-state electronic structure and lattice relaxation, and (ii) to compare calculated properties with experiment and with previous pair-potential simulations. 16- and 54-site supercells were employed in the Li-host calculations and a 32-site supercell was employed for the Al vacancy. The self-consistent Kohn-Sham orbitals, expanded in a plane-wave basis, were obtained using the modified steepest-descents algorithm of Williams and Soler and the band-by-band iteration method of Teter, Payne, and Allan. Electron-ion interactions were represented by generalized norm-conserving pseudopotentials cast in separable form. The relative performance of the two optimization algorithms is discussed. The equilibrium lattice relaxation was calculated by the Newton-Raphson method, with the Hessian matrix determined from numerical derivatives of the Hellman-Feynman forces. Calculated vacancy-formation energies are in excellent agreement with experiment. C1 UNIVERSAL ENERGY SYST,DAYTON,OH 45432. POHANG INST SCI & TECHNOL,DEPT PHYS,POHANG 680,SOUTH KOREA. RP BENEDEK, R (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 42 TC 42 Z9 42 U1 1 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 6 BP 2607 EP 2612 DI 10.1103/PhysRevB.45.2607 PG 6 WC Physics, Condensed Matter SC Physics GA HD258 UT WOS:A1992HD25800001 ER PT J AU REINHARD, L ROBERTSON, JL MOSS, SC ICE, GE ZSCHACK, P SPARKS, CJ AF REINHARD, L ROBERTSON, JL MOSS, SC ICE, GE ZSCHACK, P SPARKS, CJ TI ANOMALOUS-X-RAY-SCATTERING STUDY OF LOCAL ORDER IN BCC FE0.53CR0.47 SO PHYSICAL REVIEW B LA English DT Article ID SHORT-RANGE ORDER; ZR-NB ALLOYS; NEUTRON-SCATTERING; OMEGA-PHASE; DISPERSION; CRYSTALS; ENERGIES; LATTICE; NI; TI AB A single crystal of Fe0.53Cr0.47, quenched to 300 K after an anneal above the sigma-phase boundary, was studied at three x-ray energies: 5.969, 7.092, and 7.6 keV (where the x-ray contrast was approximately 0). With our analyzer detector we were able to remove the Compton and resonant Raman scattering experimentally to leave solely the diffuse scattering from concentration fluctuations and atomic displacements. Using the 7.6-keV data to determine and remove the combined pure static and thermal diffuse scattering, the other two data sets were least-squares fitted for short-range order and local-atomic-displacement parameters. These data sets both indicate a clustering tendency (Fe-Fe and Cr-Cr local environments). Inverse Monte Carlo and Krivoglaz-Clapp-Moss determinations of pair-interaction energies agree well and compare favorably with recent theoretical calculations. The average individual Fe-Fe and Cr-Cr distances were also determined and revealed a contraction of both Fe-Fe and Cr-Cr nearest-neighbor distances (Cr is the larger atom). This result disagrees with a conventional treatment of atom-size effects in solid solutions and must be understood using species-dependent solute-lattice couplings. Finally, no indication of premonitory sigma-phase fluctuations was found although diffuse scattering attributable to a related omega-phase softness was observed. C1 UNIV HOUSTON,DEPT PHYS,HOUSTON,TX 77204. OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. NR 61 TC 58 Z9 58 U1 0 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 6 BP 2662 EP 2676 DI 10.1103/PhysRevB.45.2662 PG 15 WC Physics, Condensed Matter SC Physics GA HD258 UT WOS:A1992HD25800008 ER PT J AU ZHAO, GL HARMON, BN AF ZHAO, GL HARMON, BN TI PHONON ANOMALIES IN BETA-PHASE NIXAL1-X ALLOYS SO PHYSICAL REVIEW B LA English DT Article ID TOTAL-ENERGY CALCULATIONS; NI-AL ALLOY; MARTENSITIC-TRANSFORMATION; NEUTRON-SCATTERING; ELECTRONIC-STRUCTURE; PREMARTENSITIC BEHAVIOR; OPTICAL-PROPERTIES; TRANSITION-METALS; RECOMMENDATIONS; DISPERSION AB The electronic band structure of beta-phase Ni(x)Al1-x has been calculated using a first-principles linear combination of atomic orbitals method, and then fitted by the nonorthogonal empirical tight-binding method for the evaluation of electron-phonon matrix elements. A Kohn-like anomaly in the TA2 branch along the [110] direction is attributed to both strong electron-phonon interactions and Fermi-surface nesting. Other phonon anomalies near q = 0.55(1,1,1)pi/a and q = 0.6(1,0,0)pi/a in beta-phase Ni0.50Al0.50 are predicted. For the Ni0.625Al0.375 composition, the TA2 anomaly shifts to smaller wave vectors and the phonon is predicted to be soft at T = 0 K. Introducing a thermal smearing of the Fermi surface is enough to stabilize this mode, which occurs near (1/3, 1/3, 0)pi/a and is associated with the well-known martensitic transformation. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. RP ZHAO, GL (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011, USA. NR 42 TC 83 Z9 84 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 6 BP 2818 EP 2824 DI 10.1103/PhysRevB.45.2818 PG 7 WC Physics, Condensed Matter SC Physics GA HD258 UT WOS:A1992HD25800025 ER PT J AU CHILDRESS, JR CHIEN, CL JANKOWSKI, AF AF CHILDRESS, JR CHIEN, CL JANKOWSKI, AF TI MAGNETIZATION, CURIE-TEMPERATURE, AND MAGNETIC-ANISOTROPY OF STRAINED (111) NI/AU SUPERLATTICES SO PHYSICAL REVIEW B LA English DT Article ID SURFACE ANISOTROPY; ULTRATHIN FILMS; THIN-FILMS; INTERFACES AB The magnetic properties of well-characterized strained (111) Ni/Au superlattices with bilayer thickness LAMBDA < 5 nm are examined as a function of Ni layer thickness d(Ni). The saturation magnetization of Ni is found to decrease inversely with d(Ni), while the decrease in Curie temperature T(C) follows a power law. Superlattices grown on 625-K substrates show larger magnetization, higher T(C), and lower magnetic anisotropy than ones grown at room temperature. In both cases, an abrupt decrease in the anisotropy is found at the same LAMBDA where a coherent-to-incoherent transition is observed in structural studies. Additional structural data indicate that, in this thickness region, the Ni layers are strongly strained both parallel and perpendicular to the growth direction, and thus do not follow conventional elastic behavior. This underlines the importance of an accurate determination of the structural properties when analyzing the magnetic properties of short-period metallic superlattices. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP CHILDRESS, JR (reprint author), JOHNS HOPKINS UNIV,DEPT PHYS & ASTRON,BALTIMORE,MD 21218, USA. NR 27 TC 28 Z9 28 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 6 BP 2855 EP 2862 DI 10.1103/PhysRevB.45.2855 PG 8 WC Physics, Condensed Matter SC Physics GA HD258 UT WOS:A1992HD25800029 ER PT J AU ERIKSSON, O BORING, AM ALBERS, RC FERNANDO, GW COOPER, BR AF ERIKSSON, O BORING, AM ALBERS, RC FERNANDO, GW COOPER, BR TI SPIN AND ORBITAL CONTRIBUTIONS TO SURFACE MAGNETISM IN 3D ELEMENTS SO PHYSICAL REVIEW B LA English DT Article ID GROUND-STATE PROPERTIES; ELECTRONIC-STRUCTURE; FCC IRON; FERROMAGNETIC-FILMS; TRANSITION-METALS; WORK FUNCTION; THIN-FILMS; ANISOTROPY; ANTIFERROMAGNETISM; INTERFACES AB We have determined theoretically both the orbital and the spin contribution to the magnetic moment on the (001) surfaces of fcc Mn, bcc and fcc Fe, hcp Co, and fcc Ni. We used a surface geometry that corresponds to the bulk crystal structure (except for Mn) with no relaxation of the surface. In addition to enhanced spin moments at the surface we find that the orbital moment for surface states is greatly enhanced (sometimes by more than 100%). We also present calculations for different spin configurations in fcc Fe, and we find that two competing spin configurations exists. fcc Mn is found to have a surface spin moment slightly larger than the surface moment of bcc Fe. Detailed information from the calculations is presented, i.e., density of states, charge-density contour plots, and orbital-projected spin moments. C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. UNIV CONNECTICUT,DEPT PHYS,STORRS,CT 06268. W VIRGINIA UNIV,DEPT PHYS,MORGANTOWN,WV 26506. RP ERIKSSON, O (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,CTR MAT SCI,LOS ALAMOS,NM 87545, USA. RI Eriksson, Olle/E-3265-2014 OI Eriksson, Olle/0000-0001-5111-1374 NR 50 TC 70 Z9 70 U1 1 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 6 BP 2868 EP 2875 DI 10.1103/PhysRevB.45.2868 PG 8 WC Physics, Condensed Matter SC Physics GA HD258 UT WOS:A1992HD25800031 ER PT J AU GUPTA, R BAILLIE, CF AF GUPTA, R BAILLIE, CF TI CRITICAL-BEHAVIOR OF THE 2-DIMENSIONAL XY MODEL SO PHYSICAL REVIEW B LA English DT Article ID MONTE-CARLO; 2 DIMENSIONS; RENORMALIZATION-GROUP; CRITICAL REGION; DISLOCATIONS AB We present detailed Monte Carlo results for the susceptibility chi, correlation length xi, and specific heat C(upsilon) for the XY model. The simulations are done on 64(2), 128(2), 256(2), and 512(2) lattices over the temperature range 0.98 less-than-or-equal-to T less-than-or-equal-to 1.43 corresponding to 2 < xi < 70. Fits to chi and xi data favor a Kosterlitz-Thouless (KT) singularity over a second-order transition; however, unconstrained four-parameter KT fits do not confirm the predicted values v = 0.5 and eta = 0.25. Our best estimate, T(c) = 0.894(5), is obtained using KT fits with nu fixed at 0.5. The exponent eta is calculated as a function of temperature in the spin-wave phase using Monte Carlo renormalization-group and finite-size-scaling methods. Both methods give consistent results and we find eta almost-equal-to 0.235 at T = 0.894. We also present results for the behavior of vortex density across the transition and exhibit how the dilute-gas approximation breaks down. C1 UNIV COLORADO,DEPT PHYS,BOULDER,CO 80309. RP GUPTA, R (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,T-8,MS-B285,LOS ALAMOS,NM 87545, USA. NR 18 TC 151 Z9 153 U1 2 U2 8 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 6 BP 2883 EP 2898 DI 10.1103/PhysRevB.45.2883 PG 16 WC Physics, Condensed Matter SC Physics GA HD258 UT WOS:A1992HD25800033 ER PT J AU ROBINSON, RA LAWSON, AC LYNN, JW BUSCHOW, KHJ AF ROBINSON, RA LAWSON, AC LYNN, JW BUSCHOW, KHJ TI TEMPERATURE-DEPENDENCE OF MAGNETIC ORDER IN UPDSN SO PHYSICAL REVIEW B LA English DT Article AB The intermetallic compound UPdSn has been studied by means of neutron powder diffraction on a two-axis spectrometer. At the lowest temperature, it is a noncollinear antiferromagnet with magnetic space group P(c)2(1), and a uranium magnetic moment of (2.05 +/- 0.04)mu(B), in agreement with previous work. The structure can be described in terms of the magnitude of the uranium magnetic moment mu and two independent canting angles theta and phi. phi is the angle between the magnetic moment and the c axis; theta is the angle between the in-plane component of the magnetic moment and the b axis. There is no detectable temperature hysteresis in the magnetic order. All three model parameters (mu, theta, and phi) vary continuously with temperature, and there is no evidence from our data of any sharp transitions below the Neel point of 43 +/- 2 K. The angle phi is almost constant over the whole temperature range, while the magnetic moment decreases continuously until it disappears just above 40 K. The angle theta-decreases continuously up to a temperature of about 35 K, where it appears to rise again. In the course of this work, we have also demonstrated the consistency of the results for magnetic systems, whether they are measured by the conventional reactor constant-wavelength technique or by the time-of-flight method on a pulsed spallation source. C1 NATL INST STAND & TECHNOL,DIV REACTOR RADIAT,GAITHERSBURG,MD 20899. PHILIPS RES LABS,5600 JA EINDHOVEN,NETHERLANDS. RP ROBINSON, RA (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. NR 8 TC 21 Z9 21 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 6 BP 2939 EP 2944 DI 10.1103/PhysRevB.45.2939 PG 6 WC Physics, Condensed Matter SC Physics GA HD258 UT WOS:A1992HD25800038 ER PT J AU CLELAND, AN SCHMIDT, JM CLARKE, J AF CLELAND, AN SCHMIDT, JM CLARKE, J TI INFLUENCE OF THE ENVIRONMENT ON THE COULOMB BLOCKADE IN SUBMICROMETER NORMAL-METAL TUNNEL-JUNCTIONS SO PHYSICAL REVIEW B LA English DT Article ID ONE-DIMENSIONAL ARRAYS; JOSEPHSON-JUNCTIONS; OSCILLATIONS; FLUCTUATIONS; TIME AB Submicrometer normal-metal tunnel junctions were fabricated with thin-film leads of either about 2 k-OMEGA/mu-m or about 30 k-OMEGA/mu-m. The current-voltage (I-V) characteristics at millikelvin temperatures displayed a much sharper Coulomb blockade for the high-resistance leads than for the low-resistance leads. The zero-bias differential resistance increased as the temperature was lowered, flattening off at the lowest temperatures. A heuristic model based on the quantum Langevin equation is developed, which explains these effects qualitatively in terms of the Nyquist noise generated in the leads; in this model, the flattening of the zero-bias resistance arises from zero-point fluctuations. The data are also compared with a more accurate phase-correlation model that treats the junction and the circuit coupled to it as a single quantum circuit. This model accounts for the observed I-V characteristics quite accurately except near zero bias where it overestimates the dynamic resistance by roughly 50% at the lowest temperatures. This model, however, does not account for the flattening of the zero-bias resistance at the lowest temperatures. It is suggested that the addition of quantum fluctuations in the junction to the phase-correlation theory may account for this discrepancy. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP CLELAND, AN (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 24 TC 59 Z9 59 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 6 BP 2950 EP 2961 DI 10.1103/PhysRevB.45.2950 PG 12 WC Physics, Condensed Matter SC Physics GA HD258 UT WOS:A1992HD25800040 ER PT J AU DEVISSER, A VANDIJK, NH BAKKER, K FRANSE, JJM LACERDA, A FLOUQUET, J FISK, Z SMITH, JL AF DEVISSER, A VANDIJK, NH BAKKER, K FRANSE, JJM LACERDA, A FLOUQUET, J FISK, Z SMITH, JL TI SEARCH FOR ANTIFERROMAGNETIC ORDER IN UBE13 VIA MAGNETOVOLUME EFFECTS SO PHYSICAL REVIEW B LA English DT Article ID HEAVY-FERMION SUPERCONDUCTORS; THERMAL-EXPANSION; ELECTRON SYSTEMS; MAGNETIC ORDER; URU2SI2; UPT3; FLUCTUATIONS; SCATTERING AB The linear magnetostriction (lambda) and the coefficient of linear thermal expansion (alpha) of a single-crystalline sample of the heavy-fermion compound UBe13 have been determined for elongation directions along and perpendicular to the applied magnetic field (B parallel-to [100]), in the temperature interval 0.3 < T < 12 K and for fields B < 8 T. We find neither evidence fo antiferromagnetic order (T(N) = 8.8 K), nor for magnetostrictive oscillations, which were reported recently by Kleiman et al. [Phys. Rev. Lett. 64, 1975 (1990)]. Instead lambda varies proportional to B2 as expected for a normal paramagnetic metal. The low-temperature normal-state electronic Gruneisen parameter is unusually large and drops rapidly in the superconducting phase (T(c) = 0.85 K). We also report magnetostriction measurements on UBe13 below T(c). The magnetovolume effects in the superconducting phase are strongly anisotropic and reveal a large hysteresis. C1 CTR RECH TRES BASSES TEMP,F-38042 GRENOBLE,FRANCE. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP DEVISSER, A (reprint author), UNIV AMSTERDAM,NATUURKUNDIG LAB,VALCKENIERSTR 65,1018 XE AMSTERDAM,NETHERLANDS. NR 35 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 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 6 BP 2962 EP 2968 DI 10.1103/PhysRevB.45.2962 PG 7 WC Physics, Condensed Matter SC Physics GA HD258 UT WOS:A1992HD25800041 ER PT J AU WOSNITZA, J CRABTREE, GW WANG, HH GEISER, U WILLIAMS, JM CARLSON, KD AF WOSNITZA, J CRABTREE, GW WANG, HH GEISER, U WILLIAMS, JM CARLSON, KD TI DEHAAS-VANALPHEN STUDIES OF THE ORGANIC SUPERCONDUCTORS ALPHA-(ET)2(NH4)HG(SCN)4 AND KAPPA-(ET)2CU(NCS)2[WITH ET = BIS(ETHELENEDITHIO)-TETRATHIAFULVALENE] SO PHYSICAL REVIEW B LA English DT Article ID CONDUCTOR (BEDT-TTF)2KHG(SCN)4; OSCILLATIONS; MAGNETORESISTANCE; KAPPA-(BEDT-TTF)2CU(NCS)2; (BEDT-TTF)2(NH4)HG(SCN)4; BETA-(BEDT-TTF)2I3; FIELDS; HEAT AB We report measurements of the de Haas-van Alphen (dHvA) effect in the organic superconductors alpha-(ET)2(NH4)Hg(SCN)4 and kappa-(ET)2Cu(NCS)2 in fields up to 15 T and temperatures down to 0.45 K. In both compounds, the perfect 1/cos-theta behavior of the dHvA frequency for angles theta of the applied field up to 70-degrees from the normal to the conducting planes shows the strong two-dimensionality of the Fermi surface (FS). The angle-dependent magnetic-breakdown orbit found in kappa-(ET)2Cu(NCS)2 hints at a small warping of the FS. The unusual angular dependence of the dHvA amplitude with up to 4 spin splitting zeros is quantitatively explainable by a 1/cos-theta dependence of the bare band cyclotron-resonance effective mass. This distinctive behavior allows the separation of the mass enhancement due to electronphonon coupling from the measured cyclotron-resonance effective mass and the estimation of the superconducting transition temperatures with the standard BCS formula, which are in qualitative agreement with the observed values. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 36 TC 62 Z9 62 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 6 BP 3018 EP 3025 DI 10.1103/PhysRevB.45.3018 PG 8 WC Physics, Condensed Matter SC Physics GA HD258 UT WOS:A1992HD25800048 ER PT J AU LIU, LW KOUVEL, JS BRUN, TO AF LIU, LW KOUVEL, JS BRUN, TO TI ANISOTROPIC-VORTEX-FLUX PRODUCTION AND RETENTION IN GRAIN-ORIENTED YBA2CU3O7 SO PHYSICAL REVIEW B LA English DT Article ID ROTATIONAL MAGNETIC PROCESSES; SUPERCONDUCTORS; CRYSTALS AB Magnetization-vector measurements were made on a zero-field-cooled sample at 4.2 K in an increasing magnetic field (H) oriented at various angles (theta(H)) relative to the a-b plane, with H corrected for demagnetization. For H above H(c1), it is found that M(P), the penetrating vortex-flux component of the sample magnetization, forms first at angles (theta(P)) relative to a-b that are generally much smaller than theta(H). The preference of the initial M(P) for the a-b plane contrasts with the remanent trapped-flux magnetization M(R), which is oriented preferentially toward the c axis. Nevertheless, both phenomena are qualitatively consistent regarding the strong anisotropy of the vortex-pinning forces in this layered crystal structure. Furthermore, it is found that for all theta(H) the components of M(P) along a-b and c versus the corresponding components of H describe two independent universal curves, suggesting that the vortices produced by H after zero-field cooling may lie only along a-b and/or along c. However, the results for M(R) do not obey an analogous scaling and suggest that the path of the trapped vortices may alternate stepwise between a-b and c. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP LIU, LW (reprint author), UNIV ILLINOIS,DEPT PHYS,CHICAGO,IL 60680, USA. NR 15 TC 10 Z9 10 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 6 BP 3054 EP 3058 DI 10.1103/PhysRevB.45.3054 PG 5 WC Physics, Condensed Matter SC Physics GA HD258 UT WOS:A1992HD25800052 ER PT J AU MONIEN, H BEDELL, KS AF MONIEN, H BEDELL, KS TI COLLECTIVE EXCITATIONS AND SUM-RULES FOR THE HUBBARD-MODEL IN THE SPIN-DENSITY-WAVE REGIME SO PHYSICAL REVIEW B LA English DT Note ID ANTIFERROMAGNET AB A variational estimate for the spin-wave velocity of the one-band Hubbard model on a square lattice in the spin-density-wave regime is studied. The estimate is given by the ratio of the f-sum rule to the static structure factor of the transverse-spin response function. The known results for the Heisenberg model are used to obtain results for those quantities in the large-U limit of the Hubbard model. The f-sum rule and static structure factor are calculated using the random-phase approximation (RPA). The spin-wave velocity calculated in the RPA, in the spin-density-wave ground state, violates the variational bound. C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP MONIEN, H (reprint author), UNIV CALIF SANTA BARBARA,INST THEORET PHYS,SANTA BARBARA,CA 93106, USA. RI Monien, Hartmut/F-3936-2010 OI Monien, Hartmut/0000-0002-2046-4641 NR 10 TC 17 Z9 17 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 6 BP 3164 EP 3167 DI 10.1103/PhysRevB.45.3164 PG 4 WC Physics, Condensed Matter SC Physics GA HD258 UT WOS:A1992HD25800076 ER PT J AU SCHMELTZER, D BISHOP, AR AF SCHMELTZER, D BISHOP, AR TI BOSONIZATION WITH CONSTRAINTS - APPLICATION TO THE ONE-DIMENSIONAL T-J MODEL SO PHYSICAL REVIEW B LA English DT Note ID HUBBARD-MODEL AB The bosonization scheme for constrained fermions in one dimension (1D) is constructed. It is shown that the constrained bosonization is similar to the unconstrained one: the only difference is a simple phase shift which restores the Fermi momentum to its noninteracting value in agreement with the Luttinger theorem. The bosonization scheme is applied to the 1D t-J model. For small J/t the model is equivalent to the Luttinger liquid for charge and spin. When J/t greater-than-or-equal-to pi sin (pi-delta)/cos(2pi-delta) (with doping delta) the holon liquid is unstable and one has only a spin liquid. This corresponds to phase separation. C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP SCHMELTZER, D (reprint author), CUNY CITY COLL,DEPT PHYS,NEW YORK,NY 10031, USA. NR 11 TC 4 Z9 4 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1992 VL 45 IS 6 BP 3168 EP 3171 DI 10.1103/PhysRevB.45.3168 PG 4 WC Physics, Condensed Matter SC Physics GA HD258 UT WOS:A1992HD25800077 ER PT J AU PICKLESIMER, A RICE, RA BRANDENBURG, R AF PICKLESIMER, A RICE, RA BRANDENBURG, R TI DELTA-DEGREES OF FREEDOM IN TRINUCLEI .2. THE HANNOVER DELTA-DELTA MODEL SO PHYSICAL REVIEW C LA English DT Article ID BINDING AB The effect of DELTA and DELTA-DELTA degrees of freedom on the triton binding energy (E(T)) is studied using the Hannover DELTA-DELTA-force model. The three-body system of interest extends through J less-than-or-equal-to 4, with L(N DELTA),L(DELTA-DELTA) less-than-or-equal-to 4. A series of preliminary investigations reduces this three-body problem to J less-than-or-equal-to 2, with L(N DELTA),L(DELTA-DELTA) less-than-or-equal-to 2, and a 110 keV attractive correction to E(T). These J less-than-or-equal-to 2 DELTA-DELTA-calculations reveal a repulsive dispersive effect of 930 keV and an attractive DELTA-DELTA-three-body force effect of 500 keV, in addition to the corresponding one-DELTA-effects of 550 and 920 keV, respectively. The total DELTA-induced dispersive effect is thus about 1480 keV, while the total DELTA-induced three-body force effect is about 1420 keV: DELTA effects on E(T) almost exactly cancel. The net DELTA-DELTA J less-than-or-equal-to 2 result is E(T) = 7.32 MeV, while the corresponding nucleons-only result is 7.38 MeV. Similarly, the net J less-than-or-equal-to 4 result is E(T) = 7.43 MeV, as compared to the corresponding nucleons-only result, 7.46 MeV. The Hannover DELTA-DELTA-force model is also examined for consistency with the two-body scattering parameters and is found to be somewhat defective in this regard. Thus, the important implications of these qualitative results for nuclear physics are to some extent dependent on confirmation using more sophisticated force models. C1 PURDUE UNIV,DEPT PHYS,W LAFAYETTE,IN 47907. UNIV BASEL,INST PHYS,CH-3056 BASEL,SWITZERLAND. RP PICKLESIMER, A (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV PHYS,LOS ALAMOS,NM 87545, USA. NR 9 TC 31 Z9 31 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 FEB PY 1992 VL 45 IS 2 BP 547 EP 562 DI 10.1103/PhysRevC.45.547 PG 16 WC Physics, Nuclear SC Physics GA HD257 UT WOS:A1992HD25700014 ER PT J AU HINTZ, NM YANG, XH GAZZALY, M SEESTROMMORRIS, SJ MORRIS, CL COOK, DC MACK, AM MCDONALD, JW MORDECHAI, S OAKLEY, DS MOORE, CF LYNKER, M ZUMBRO, JD AF HINTZ, NM YANG, XH GAZZALY, M SEESTROMMORRIS, SJ MORRIS, CL COOK, DC MACK, AM MCDONALD, JW MORDECHAI, S OAKLEY, DS MOORE, CF LYNKER, M ZUMBRO, JD TI DETERMINATION OF NEUTRON AND PROTON MULTIPOLE MATRIX-ELEMENTS IN PB-208 FROM PI- AND PI+ SCATTERING AT 180 MEV SO PHYSICAL REVIEW C LA English DT Article ID INELASTIC-SCATTERING; ELASTIC-SCATTERING; NUCLEUS SCATTERING; INTERMEDIATE ENERGY; COMPUTER-PROGRAM; STATES; PIONS; DEPENDENCE; EXCITATION; CR-52 AB New data for elastic and inelastic pi+ and pi- scattering by Pb-208 at 180 MeV are presented. The elastic scattering data were analyzed with a standard Kisslinger potential in a coordinate space (r space) calculation using the free pi-N amplitudes to calculate the potential coefficients. Momentum-space (p-space) calculations were also performed using the free pi-N amplitudes to calculate on-shell matrix elements and the Landau-Tabakin model for the off-shell. The same ground-state proton and neutron densities were used in these two spaces and the fits are good. The distorted-wave impulse approximation calculations in both spaces, with the same collective model transition densities, reproduce the inelastic differential cross sections quite well. The proton and neutron transition multipole matrix elements and their ratios were calculated from the deformation parameters extracted from fits to inelastic scattering data. It is found that the ratios calculated in these two spaces are quite close to each other and close to those found in a comparison of (e,e') and (p,p') experiments, while the absolute value of matrix elements found in the p-space calculations are approximately 15-20 % smaller than those from the r-space calculations. The r-space proton matrix elements are generally in good agreement with those obtained from electron scattering. The effects of the pion-nucleon interactions and form factors used in these calculations were investigated. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. UNIV TEXAS,AUSTIN,TX 78712. UNIV PENN,PHILADELPHIA,PA 19104. BEN GURION UNIV NEGEV,IL-84105 BEER SHEVA,ISRAEL. RP HINTZ, NM (reprint author), UNIV MINNESOTA,MINNEAPOLIS,MN 55455, USA. NR 51 TC 7 Z9 7 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD FEB PY 1992 VL 45 IS 2 BP 601 EP 612 DI 10.1103/PhysRevC.45.601 PG 12 WC Physics, Nuclear SC Physics GA HD257 UT WOS:A1992HD25700019 ER PT J AU OSNES, E STROTTMAN, D AF OSNES, E STROTTMAN, D TI SPIN-TENSOR ANALYSIS OF REALISTIC SHELL-MODEL INTERACTIONS SO PHYSICAL REVIEW C LA English DT Article ID 1S-0D SHELL AB In this paper various realistic shell model effective interactions are analyzed in terms of their central, vector, and tensor components. The effective forces were obtained from phenomenological (Hamada-Johnston) as well as from modern meson-exchange (Bonn-Julich and Paris) nucleon-nucleon potentials and were calculated to various approximations within the framework of perturbation theory. For all forces examined, the dominant contribution comes from the central part. The vector component is small for the bare G-matrix interaction, especially for T = 0, but is considerably modified by renormalization. The tensor component is somewhat larger than the vector component and is relatively larger for the Hamada-Johnston potential than for the Bonn-Julich and Paris potentials. Centroids in j-j and SU(3) coupling were obtained with and without noncentral contributions; considerable sensitivity was observed in the SU(3) basis. C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP OSNES, E (reprint author), UNIV OSLO,DEPT PHYS,OSLO 3,NORWAY. NR 24 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 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD FEB PY 1992 VL 45 IS 2 BP 662 EP 670 DI 10.1103/PhysRevC.45.662 PG 9 WC Physics, Nuclear SC Physics GA HD257 UT WOS:A1992HD25700022 ER PT J AU BEGEMANNBLAICH, M BLAICH, T FOWLER, MM WILHELMY, JB BRITT, HC FIELDS, DJ HANSEN, LF LANIER, RG MASSOLETTI, DJ NAMBOODIRI, MN REMINGTON, BA SANGSTER, TC STRUBLE, GL WEBB, ML CHAN, YD DACAL, A HARMON, A POULIOT, J STOKSTAD, RG KAUFMAN, S VIDEBAEK, F FRAENKEL, Z AF BEGEMANNBLAICH, M BLAICH, T FOWLER, MM WILHELMY, JB BRITT, HC FIELDS, DJ HANSEN, LF LANIER, RG MASSOLETTI, DJ NAMBOODIRI, MN REMINGTON, BA SANGSTER, TC STRUBLE, GL WEBB, ML CHAN, YD DACAL, A HARMON, A POULIOT, J STOKSTAD, RG KAUFMAN, S VIDEBAEK, F FRAENKEL, Z TI FISSION FROM FE AND NB REACTIONS WITH HEAVY TARGETS AT 50-100 MEV NUCLEON SO PHYSICAL REVIEW C LA English DT Article ID LINEAR MOMENTUM-TRANSFER; HOT NUCLEI; COLLISIONS; U-238; DECAY; IONS; C-12 AB Cross sections, parallel and perpendicular momentum transfers, charge loss, and velocity systematics are presented for fission following reactions of Fe and Nb projectiles at 50-100 MeV/nucleon on targets of Ta, Au, and Th. Data are compared to simple models for peripheral heavy ion collisions. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. ARGONNE NATL LAB,ARGONNE,IL 60439. WEIZMANN INST SCI,IL-76100 REHOVOT,ISRAEL. NR 30 TC 16 Z9 16 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 FEB PY 1992 VL 45 IS 2 BP 677 EP 688 DI 10.1103/PhysRevC.45.677 PG 12 WC Physics, Nuclear SC Physics GA HD257 UT WOS:A1992HD25700024 ER PT J AU BLAICH, T BEGEMANNBLAICH, M FOWLER, MM WILHELMY, JB BRITT, HC FIELDS, DJ HANSEN, LF NAMBOODIRI, MN SANGSTER, TC FRAENKEL, Z AF BLAICH, T BEGEMANNBLAICH, M FOWLER, MM WILHELMY, JB BRITT, HC FIELDS, DJ HANSEN, LF NAMBOODIRI, MN SANGSTER, TC FRAENKEL, Z TI CALCULATION FOR FISSION DECAY FROM HEAVY-ION REACTIONS AT INTERMEDIATE ENERGIES SO PHYSICAL REVIEW C LA English DT Article ID INTRANUCLEAR CASCADE CALCULATION; NEUTRON EMISSION; COLLISIONS; RESIDUES; NUCLEI; AU-197; MODEL AB A detailed deexcitation calculation is presented for target residues resulting from intermediate-energy heavy ion reactions. The model involves an intranuclear cascade, subsequent fast nucleon emission, and final decay by statistical evaporation including fission. Results are compared to data from bombardments with Fe and Nb projectiles on targets of Ta, Au, and Th at 100 MeV/nucleon. The majority of observable features are reproduced with this simple approach, making obvious the need for involving new physical phenomena associated with multifragmentation or other collective dissipation mechanisms. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. WEIZMANN INST SCI,IL-76100 REHOVOT,ISRAEL. NR 23 TC 18 Z9 18 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 FEB PY 1992 VL 45 IS 2 BP 689 EP 697 DI 10.1103/PhysRevC.45.689 PG 9 WC Physics, Nuclear SC Physics GA HD257 UT WOS:A1992HD25700025 ER PT J AU GARINO, G SABER, M SEGEL, RE GEESAMAN, DF GILMAN, R GREEN, MC HOLT, RJ SCHIFFER, JP ZEIDMAN, B BEISE, EJ DODSON, GW HOIBRATEN, S PHAM, LD REDWINE, RP SAPP, WW WILLIAMSON, CF WOOD, SA CHANT, NS ROOS, PG SILK, JD DEADY, M MARUYAMA, XK AF GARINO, G SABER, M SEGEL, RE GEESAMAN, DF GILMAN, R GREEN, MC HOLT, RJ SCHIFFER, JP ZEIDMAN, B BEISE, EJ DODSON, GW HOIBRATEN, S PHAM, LD REDWINE, RP SAPP, WW WILLIAMSON, CF WOOD, SA CHANT, NS ROOS, PG SILK, JD DEADY, M MARUYAMA, XK TI PROTON PROPAGATION IN NUCLEI STUDIES IN THE (E,E'P) REACTION SO PHYSICAL REVIEW C LA English DT Article ID MEAN FREE-PATH; ELASTIC ELECTRON-SCATTERING; E'P REACTIONS; KNOCKOUT; MATTER; RADIUS AB Proton propagation in nuclei was studied using the (e,e'p) reaction in the quasifree region. The coincidence (e,e'p) cross sections were measured at an electron angle of 50.4-degrees and proton angles of 50.1-degrees, 58.2-degrees, 67.9-degrees, and 72.9-degrees for C-12, Al-27, Ni-58, and Ta-181 targets at a beam energy of 779.5 MeV. The average outgoing proton energy was 180 MeV. The ratio of the (e,e'p) yield to the simultaneously measured (e,e') yield was compared to that calculated in the plane-wave impulse approximation and an experimental transmission defined. These experimental transmissions are considerably larger (a factor of approximately 2 for Ta-181) than those one would calculate from the free N-N cross sections folded into the nuclear density distribution. A new calculation that includes medium effects (N-N correlations, density dependence of the N-N cross sections and Pauli suppression) accounts for this increase. C1 NORTHWESTERN UNIV,EVANSTON,IL 60208. ARGONNE NATL LAB,ARGONNE,IL 60439. MIT,CAMBRIDGE,MA 02139. UNIV MARYLAND,COLLEGE PK,MD 20742. UNIV PENN,PHILADELPHIA,PA 19104. MT HOLYOKE COLL,S HADLEY,MA 01075. NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899. RI Holt, Roy/E-5803-2011 NR 38 TC 73 Z9 73 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 FEB PY 1992 VL 45 IS 2 BP 780 EP 790 DI 10.1103/PhysRevC.45.780 PG 11 WC Physics, Nuclear SC Physics GA HD257 UT WOS:A1992HD25700036 ER PT J AU PANDHARIPANDE, VR PIEPER, SC AF PANDHARIPANDE, VR PIEPER, SC TI NUCLEAR TRANSPARENCY TO INTERMEDIATE-ENERGY NUCLEONS FROM (E,E'P) REACTIONS SO PHYSICAL REVIEW C LA English DT Article ID HEAVY-ION COLLISIONS; IMAGINARY PART; MATTER; SCATTERING; MODELS AB A simple relation between the nucleon-nucleon scattering cross sections in vacuum and in nuclear matter is proposed. It consistently takes into account the velocity dependence of the nuclear mean field and Pauli blocking, and is shown to be fairly accurate. It is used to study the mean free path of nucleons in nuclear matter and the imaginary part of the optical potential. It is also used with the local density approximation and the correlated Glauber approximation to calculate the transparency of nuclei as measured by (e,e'p) reactions. The Pauli blocking, velocity dependence of the nuclear mean field, and the ground-state correlations increase the transparency, and all the three effects are necessary to explain the observed transparencies of C-12, Al-27, Ni-58, and Ta-181 for recoiling 180 MeV protons. C1 ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439. RP PANDHARIPANDE, VR (reprint author), UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801, USA. NR 28 TC 124 Z9 125 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 FEB PY 1992 VL 45 IS 2 BP 791 EP 798 DI 10.1103/PhysRevC.45.791 PG 8 WC Physics, Nuclear SC Physics GA HD257 UT WOS:A1992HD25700037 ER PT J AU BARRETTE, J BELLWIED, R BRAUNMUNZINGER, P CLELAND, WE DAVID, G DEE, J FATYGA, M FOX, D GREENE, SV HALL, J HEMMICK, TK HEIFETZ, R HERRMANN, N HOGUE, RW INGOLD, G JAYANANDA, K KRAUS, D KUMAR, BS LISA, M LISSAUER, D LLOPE, WJ LUDLAM, T MAJKA, R MAKOWIECKI, D MARK, SK MITCHELL, JT MUTHUSWAMY, M OBRIEN, E POLYCHRONAKOS, V PRUNEAU, C ROTONDO, F SANDWEISS, J SIMON, J SONNADARA, U STACHEL, J TAKAI, H THROWE, T WATERS, L WINTER, C WOODY, C WOLF, K WOLFE, D ZHANG, Y AF BARRETTE, J BELLWIED, R BRAUNMUNZINGER, P CLELAND, WE DAVID, G DEE, J FATYGA, M FOX, D GREENE, SV HALL, J HEMMICK, TK HEIFETZ, R HERRMANN, N HOGUE, RW INGOLD, G JAYANANDA, K KRAUS, D KUMAR, BS LISA, M LISSAUER, D LLOPE, WJ LUDLAM, T MAJKA, R MAKOWIECKI, D MARK, SK MITCHELL, JT MUTHUSWAMY, M OBRIEN, E POLYCHRONAKOS, V PRUNEAU, C ROTONDO, F SANDWEISS, J SIMON, J SONNADARA, U STACHEL, J TAKAI, H THROWE, T WATERS, L WINTER, C WOODY, C WOLF, K WOLFE, D ZHANG, Y TI FORWARD BARYONS IN RELATIVISTIC NUCLEUS-NUCLEUS COLLISIONS SO PHYSICAL REVIEW C LA English DT Article ID CHAMBERS; READOUT; FLOW AB We present the rapidity and transverse momentum distributions of protons and neutrons from collisions between 14.6 GeV/nucleon beams of Si-28 and targets of Al, Cu, and Pb. The data were measured in the forward spectrometer/target calorimeter detectors of the E814 apparatus. The results indicate the existence of two distinct domains, one of beam rapidity projectilelike nucleons, and the second of participant nucleons. From the former, the in-medium inelastic nucleon-nucleon cross section is deduced. It is found to agree, within 10% with the "free" value of 30 mb although under present conditions one of the two colliding nucleons has been struck before with a high probability. We compare with the present data the predictions of a fragmentation model as well as of models dealing explicitly with the heavy-ion collision and particle creation and emission. C1 SUNY STONY BROOK,STONY BROOK,NY 11794. UNIV PITTSBURGH,PITTSBURGH,PA 15260. BROOKHAVEN NATL LAB,UPTON,NY 11973. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. YALE UNIV,NEW HAVEN,CT 06511. UNIV NEW MEXICO,ALBUQUERQUE,NM 87131. TEL AVIV UNIV,IL-69978 TEL AVIV,ISRAEL. GESELL SCHWERIONENFORSCH GMBH,W-6100 DARMSTADT 11,GERMANY. TEXAS A&M UNIV SYST,COLLEGE STN,TX 77843. RP BARRETTE, J (reprint author), MCGILL UNIV,MONTREAL H3A 2T8,QUEBEC,CANADA. RI Sonnadara, Upul/E-6359-2010; Takai, Helio/C-3301-2012; OI Takai, Helio/0000-0001-9253-8307; Sonnadara, Upul/0000-0001-7862-2537 NR 25 TC 31 Z9 31 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 FEB PY 1992 VL 45 IS 2 BP 819 EP 832 DI 10.1103/PhysRevC.45.819 PG 14 WC Physics, Nuclear SC Physics GA HD257 UT WOS:A1992HD25700040 ER PT J AU GLENDENNING, NK WEBER, F MOSZKOWSKI, SA AF GLENDENNING, NK WEBER, F MOSZKOWSKI, SA TI NEUTRON-STARS IN THE DERIVATIVE COUPLING MODEL SO PHYSICAL REVIEW C LA English DT Article ID NUCLEAR-MATTER; SECULAR INSTABILITIES; LAMBDA-HYPERNUCLEI; MILLISECOND PULSAR; DENSE MATTER; FIELD-THEORY; EQUATION; STATE; OSCILLATIONS; RELATIVITY AB Properties of neutron stars derived from the hybrid derivative coupling model of nuclear field theory are studied. Generalized beta equilibrium with all baryon types to convergence is allowed. Hyperon couplings compatible with the inferred binding energy of the lambda hyperon in saturated nuclear matter predict a large hyperon population, with neutrons having a bare majority population in a 1.5M. neutron star. Among the properties studied are the limits on rotation imposed by gravitation-radiation-reaction instabilities as moderated by viscosity. These instabilities place a lower limit on rotational periods of neutron and hybrid stars of about 1 ms. C1 UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024. RP GLENDENNING, NK (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 54 TC 107 Z9 107 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 FEB PY 1992 VL 45 IS 2 BP 844 EP 855 DI 10.1103/PhysRevC.45.844 PG 12 WC Physics, Nuclear SC Physics GA HD257 UT WOS:A1992HD25700042 ER PT J AU TOTH, KS KIM, HJ MCCONNELL, JW BINGHAM, CR SOUSA, DC AF TOTH, KS KIM, HJ MCCONNELL, JW BINGHAM, CR SOUSA, DC TI ALPHA-DECAYS OF LIGHT URANIUM ISOTOPES SO PHYSICAL REVIEW C LA English DT Note AB With the use of a velocity filter, the alpha-particle decays of 224U and 225U were studied in F-19 bombardments of Bi-209. The data obtained for these two isotopes are compared with those of previous investigators, and the alpha-decay rates of 222,224,226U are discussed within the context of partial alpha half-lives for even-even nuclei with Z greater-than-or-equal-to 84. C1 UNIV TENNESSEE,KNOXVILLE,TN 37996. EASTERN KENTUCKY UNIV,RICHMOND,KY 40475. RP TOTH, KS (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 12 TC 12 Z9 12 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 FEB PY 1992 VL 45 IS 2 BP 856 EP 859 DI 10.1103/PhysRevC.45.856 PG 4 WC Physics, Nuclear SC Physics GA HD257 UT WOS:A1992HD25700043 ER PT J AU GINOCCHIO, JN KUYUCAK, S AF GINOCCHIO, JN KUYUCAK, S TI DETERMINATION OF F-SPIN SYMMETRY IN DEFORMED-NUCLEI SO PHYSICAL REVIEW C LA English DT Note ID NEUTRON; PROTON; MODELS AB The purity of a neutron-proton symmetry called F spin is estimated in collective nuclei. Two simple formulas are shown to provide a quick and accurate estimate for F spin admixtures in the ground band. Conclusions are also drawn about quadrupole effective charges in collective nuclei. C1 UNIV MELBOURNE,SCH PHYS,PARKVILLE,VIC 3052,AUSTRALIA. RP GINOCCHIO, JN (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 11 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 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD FEB PY 1992 VL 45 IS 2 BP 867 EP 869 DI 10.1103/PhysRevC.45.867 PG 3 WC Physics, Nuclear SC Physics GA HD257 UT WOS:A1992HD25700046 ER PT J AU THOENNESSEN, M BEENE, JR AF THOENNESSEN, M BEENE, JR TI NUCLEAR DISSIPATION AND THE FEEDING OF SUPERDEFORMED BANDS SO PHYSICAL REVIEW C LA English DT Note ID NEUTRON EMISSION; FISSION; DY-152; FUSION; ER-156; DECAY AB Statistical model calculations including nuclear dissipation were performed to calculate the high-energy gamma-ray spectrum following the reaction O-16+Tb-159. Including dissipation changes the spin population distribution leading to evaporation residues and fission. The calculations show that a larger fraction of the highest partial waves contributes to evaporation residues than standard statistical model calculations predict (an increase of 65% for spins > 65h). This effect is shown to provide an explanation for enhanced feeding of superdeformed bands which are populated by the highest partial waves leading to evaporation residues. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48824. RP THOENNESSEN, M (reprint author), MICHIGAN STATE UNIV,NATL SUPERCOND CYCLOTRON LAB,E LANSING,MI 48824, USA. NR 25 TC 13 Z9 13 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD FEB PY 1992 VL 45 IS 2 BP 873 EP 875 DI 10.1103/PhysRevC.45.873 PG 3 WC Physics, Nuclear SC Physics GA HD257 UT WOS:A1992HD25700048 ER PT J AU RANSOME, RD MORRIS, CL CUPPS, VR FERGERSON, RW MCGILL, JA WATSON, DL ZUMBRO, JD RITCHIE, BG COMFORT, JR TINSLEY, JR LOVEMAN, RA DAWSON, S GREEN, A GUGELOT, PC MOORE, CF AF RANSOME, RD MORRIS, CL CUPPS, VR FERGERSON, RW MCGILL, JA WATSON, DL ZUMBRO, JD RITCHIE, BG COMFORT, JR TINSLEY, JR LOVEMAN, RA DAWSON, S GREEN, A GUGELOT, PC MOORE, CF TI PION ABSORPTION IN HEAVY-NUCLEI SO PHYSICAL REVIEW C LA English DT Note ID CROSS-SECTIONS; LIGHT-NUCLEI; CARBON; HE-4; LI-6; PI+ AB Cross sections have been measured for proton emission following pi+ absorption on Li-6, C-12, Al-27, Ni-58, Sn-118, Pb-208, and U-238 for pion kinetic energies of 50, 100, 150, and 200 MeV by using a large-solid-angle bismuth germanate detector array. An increasing fraction of transitions to states of large missing energy and with particles other than protons is observed as the energy and mass increase. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. UNIV YORK,YORK YO1 5DD,N YORKSHIRE,ENGLAND. UNIV PENN,PHILADELPHIA,PA 19104. ARIZONA STATE UNIV,TEMPE,AZ 85287. UNIV COLORADO,BOULDER,CO 80309. UNIV VIRGINIA,CHARLOTTESVILLE,VA 22901. UNIV TEXAS,AUSTIN,TX 78712. RP RANSOME, RD (reprint author), RUTGERS STATE UNIV,PISCATAWAY,NJ 08855, USA. NR 27 TC 36 Z9 36 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 FEB PY 1992 VL 45 IS 2 BP R509 EP R513 DI 10.1103/PhysRevC.45.R509 PG 5 WC Physics, Nuclear SC Physics GA HD257 UT WOS:A1992HD25700006 ER PT J AU SORENSON, DS ASLANOGLOU, X BRADY, FP DRUMMOND, JR HAIGHT, RC HOWELL, CR KING, NSP LING, A LISOWSKI, PW PARK, BK RAPAPORT, J ROMERO, JL TORNOW, W ULLMANN, JL AF SORENSON, DS ASLANOGLOU, X BRADY, FP DRUMMOND, JR HAIGHT, RC HOWELL, CR KING, NSP LING, A LISOWSKI, PW PARK, BK RAPAPORT, J ROMERO, JL TORNOW, W ULLMANN, JL TI ENERGY-DEPENDENCE OF THE GAMOW-TELLER STRENGTH IN P-SHELL NUCLEI OBSERVED IN THE (N,P) REACTION SO PHYSICAL REVIEW C LA English DT Note ID SPIN CONTRIBUTIONS; P,N REACTION; SCATTERING; C-12(P,N)N-12; ISOVECTOR; EFFICIENCIES; FACILITY; DETECTOR; EXCHANGE; PROBE AB Cross sections from 0-degrees to 10-degrees (lab) have been measured for ground-state Gamow-Teller transitions for the reactions Li-6(n,p)He-6, C-12(n,p)B-12, and C-13(n,p)B-13 from 60 to 260 MeV. The 90 meter station at the Weapons Neutron Research facility at Los Alamos National Laboratory was used to obtain these data. Unit cross sections (sigma) have been obtained and are compared with existing (n,p) and (p,n) data. The volume integrals (J(sigma-tau) for the spin-flip isospin-flip part of the effective nucleon-nucleon interaction have also been obtained and are compared with theoretical predictions. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. DUKE UNIV,DURHAM,NC 27706. TRIANGLE UNIV NUCL LAB,DURHAM,NC 27706. OHIO UNIV,ATHENS,OH 45701. RP SORENSON, DS (reprint author), UNIV CALIF DAVIS,DAVIS,CA 95616, USA. NR 39 TC 14 Z9 14 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 FEB PY 1992 VL 45 IS 2 BP R500 EP R503 DI 10.1103/PhysRevC.45.R500 PG 4 WC Physics, Nuclear SC Physics GA HD257 UT WOS:A1992HD25700004 ER PT J AU BRICK, DH WIDGOFF, M BEILLIERE, P LUTZ, P NARJOUX, JL GELFAND, N ALYEA, ED BLOOMER, M BOBER, J BUSZA, W COLE, B FRANK, TA FUESS, TA GRODZINS, L HAFEN, ES HARIDAS, P HUANG, D HUANG, HZ HULSIZER, R KISTIAKOWSKY, V LEDOUX, RJ MILSTENE, C NOGUCHI, S OH, SH PLESS, IA STEADMAN, S STOUGHTON, TB SUCHOREBROW, V TETHER, S TREPAGNIER, PC WADSWORTH, BF WU, Y YAMAMOTO, RK COHN, HO CALLIGARICH, E CORTI, G DOLFINI, R GIANINI, G INTROZZI, G RATTI, S BADIAK, M DIMARCO, R JACQUES, PF KALELKAR, M PLANO, RJ STAMER, PE BRUCKER, EB KOLLER, EL ALEXANDER, G GRUNHAUS, J LEVY, A BRAU, JE BUGG, WM CONDO, GT HANDLER, T HARGIS, HJ HART, EL RAFATIAN, A ROGERS, AH KITAGAKI, T TANAKA, S YUTA, H ABE, K HASEGAWA, K YAMAGUCHI, A TAMAI, K HAYASCHINO, Y OTANI, Y HIGUCHI, M SATO, M LUDLAM, T STEINER, R TAFT, H AF BRICK, DH WIDGOFF, M BEILLIERE, P LUTZ, P NARJOUX, JL GELFAND, N ALYEA, ED BLOOMER, M BOBER, J BUSZA, W COLE, B FRANK, TA FUESS, TA GRODZINS, L HAFEN, ES HARIDAS, P HUANG, D HUANG, HZ HULSIZER, R KISTIAKOWSKY, V LEDOUX, RJ MILSTENE, C NOGUCHI, S OH, SH PLESS, IA STEADMAN, S STOUGHTON, TB SUCHOREBROW, V TETHER, S TREPAGNIER, PC WADSWORTH, BF WU, Y YAMAMOTO, RK COHN, HO CALLIGARICH, E CORTI, G DOLFINI, R GIANINI, G INTROZZI, G RATTI, S BADIAK, M DIMARCO, R JACQUES, PF KALELKAR, M PLANO, RJ STAMER, PE BRUCKER, EB KOLLER, EL ALEXANDER, G GRUNHAUS, J LEVY, A BRAU, JE BUGG, WM CONDO, GT HANDLER, T HARGIS, HJ HART, EL RAFATIAN, A ROGERS, AH KITAGAKI, T TANAKA, S YUTA, H ABE, K HASEGAWA, K YAMAGUCHI, A TAMAI, K HAYASCHINO, Y OTANI, Y HIGUCHI, M SATO, M LUDLAM, T STEINER, R TAFT, H TI NEUTRAL-STRANGE-PARTICLE PRODUCTION IN 200-GEV/C P/PI+/K+ INTERACTIONS ON AU, AG, AND MG SO PHYSICAL REVIEW D LA English DT Article ID PROTON-NUCLEUS COLLISIONS; LAMBDA-BAR PRODUCTION; MULTIPARTICLE PRODUCTION; CROSS-SECTIONS; GEV-C; MODELS; PBAR; PI+/; PP AB We have used the Fermilab 30-in. bubble-chamber-hybrid spectrometer to study neutral-strange-particle production in the interactions of 200-GeV/c protons and pi+ and K+ mesons with nuclei of gold, silver, and magnesium. Average multiplicities and inclusive cross sections for K0 and LAMBDA are measured, and a power law is found to give a good description of their A dependence. The exponent characterizing the A dependence is consistent with being the same for K0 and LAMBDA-production, and also the same for proton and pi+ beams. Average K0 and LAMBDA-multiplicities, as well as their ratio, have been measured as functions of the numbers of projectile collisions-nu(p) and secondary collisions-nu(s), in the nucleus, and indicate that rescattering contributes significantly to enhancement of LAMBDA-production but not to K0 production. The properties of events with multiple K0's or LAMBDA's also corroborate this conclusion. K0 rapidities are in the central region and decrease gently with increasing nu(p), while LAMBDA-rapidities are in the target-fragmentation region and are independent of nu(p). K0 and LAMBDA-multiplicities increase with the rapidity loss of the projectile, but their rapidities do not. C1 COLL FRANCE,F-75231 PARIS 05,FRANCE. FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. INDIANA UNIV,BLOOMINGTON,IN 47401. MIT,DEPT PHYS,CAMBRIDGE,MA 02139. MIT,NUCL SCI LAB,CAMBRIDGE,MA 02139. OAK RIDGE NATL LAB,OAK RIDGE,TN 37830. IST NAZL FIS NUCL,PAVIA,ITALY. UNIV PAVIA,I-27100 PAVIA,ITALY. RUTGERS STATE UNIV,NEW BRUNSWICK,NJ 08903. SETON HALL UNIV,S ORANGE,NJ 07079. STEVENS INST TECHNOL LIB,HOBOKEN,NJ 07030. TEL AVIV UNIV,IL-69978 TEL AVIV,ISRAEL. UNIV TENNESSEE,KNOXVILLE,TN 37996. TOHOKU UNIV,SENDAI,MIYAGI 980,JAPAN. TOHOKU GAKUIN UNIV,TAGAJO,MIYAGI,JAPAN. YALE UNIV,NEW HAVEN,CT 06520. RP BRICK, DH (reprint author), BROWN UNIV,PROVIDENCE,RI 02912, USA. RI Introzzi, Gianluca/K-2497-2015; Gianini, Gabriele/M-5195-2014 OI Introzzi, Gianluca/0000-0002-1314-2580; Gianini, Gabriele/0000-0001-5186-0199 NR 22 TC 11 Z9 11 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD FEB 1 PY 1992 VL 45 IS 3 BP 734 EP 742 DI 10.1103/PhysRevD.45.734 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HB928 UT WOS:A1992HB92800004 ER PT J AU MERENYI, R MANN, WA KAFKA, T LEESON, W SAITTA, B SCHNEPS, J DERRICK, M MUSGRAVE, B AF MERENYI, R MANN, WA KAFKA, T LEESON, W SAITTA, B SCHNEPS, J DERRICK, M MUSGRAVE, B TI DETERMINATION OF PION INTRANUCLEAR RESCATTERING RATES IN NU-MU-NE VERSUS NU-MU-D INTERACTIONS FOR THE ATMOSPHERIC NU FLUX SO PHYSICAL REVIEW D LA English DT Article ID MESON PRODUCTION; PROTON DECAY; FERMI-MOTION; LOW-ENERGY; NUCLEI; THRESHOLD; COLLISIONS; DEUTERIUM; 2-PION AB Intranuclear rescattering rates are determined for low energy pions created within neon nuclei by muon neutrinos with energies between 0.4 and 6.0 GeV. Specifically, charged current nu(mu)-neon and nu(mu)-deuteron interactions from two accelerator bubble chamber experiments are E(nu) weighted to match the shape of the atmospheric neutrino spectrum. The relative populations of final states within the weighted event samples imply rates for pion absorption and pion charge exchange, which expressed as probabilities per final state pion, are 0.22 +/- 0.05 and 0.10 +/- 0.08, respectively. Inclusive pi+/- momenta and production angle distributions from neon are found to be similar to those from deuteron targets; sizable kinematic distortions attributable to inelastic rescattering are absent. However, the fraction of pi+ (pi-) momenta in neon which are less than 300 MeV/c and backward in the laboratory system slightly exceeds the deuteron fraction, by 0.03 +/- 0.04 (0.11 +/- 0.10). Our measurements indicate the extent to which pion intranuclear rescattering may distort final states resulting from atmospheric neutrino reactions or from nucleon decays in nuclei having mass number near A = 20. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. RP MERENYI, R (reprint author), TUFTS UNIV,MEDFORD,MA 02155, USA. NR 23 TC 31 Z9 31 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD FEB 1 PY 1992 VL 45 IS 3 BP 743 EP 751 DI 10.1103/PhysRevD.45.743 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HB928 UT WOS:A1992HB92800005 ER PT J AU WANG, XN GYULASSY, M AF WANG, XN GYULASSY, M TI SYSTEMATIC STUDY OF PARTICLE-PRODUCTION IN P+P (PBAR) COLLISIONS VIA THE HIJING MODEL SO PHYSICAL REVIEW D LA English DT Article ID NUCLEUS-NUCLEUS COLLISIONS; LUND MONTE-CARLO; RISING CROSS-SECTIONS; GEV CM ENERGY; S = 630; JET FRAGMENTATION; PP INTERACTIONS; PSEUDORAPIDITY DISTRIBUTIONS; MULTIPLICITY DISTRIBUTIONS; RAPIDITY DISTRIBUTIONS AB We apply the newly developed HIJING Monte Carlo model to perform a systematic study of a broad range of data on p + p(pBAR) collisions. The model combines a simple string phenomenology for low-p(T) processes together with perturbative QCD for high-p(T) processes. We emphasize the effects due to multiple-minijet production at collider energies. The energy and multiplicity dependence of charged particle rapidity and transverse momentum spectra, the Koba-Nielsen-Olesen violation of multiplicity distributions, and the two-particle correlation functions are shown to be simultaneously well accounted for with this model. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. NR 78 TC 152 Z9 153 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD FEB 1 PY 1992 VL 45 IS 3 BP 844 EP 856 DI 10.1103/PhysRevD.45.844 PG 13 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HB928 UT WOS:A1992HB92800016 ER PT J AU BERNARD, CW ELKHADRA, AX SONI, A AF BERNARD, CW ELKHADRA, AX SONI, A TI LATTICE STUDY OF SEMILEPTONIC DECAYS OF CHARM MESONS INTO VECTOR-MESONS SO PHYSICAL REVIEW D LA English DT Article ID CURRENTS; QUARKS AB We present our lattice calculation of the semileptonic form factors for the decays D --> K*, D(s) --> phi, and D --> rho using Wilson fermions on a 24(3) x 39 lattice at beta = 6.0 with 8 quenched configurations. For D --> K*, we find for the ratio of axial form factors A2(0)/A1(0) = 0.70 +/- 0.16(-0.15)(+0.20). Results for other form factors and ratios are also given. C1 FERMI NATL ACCELERATOR LAB,THEORY GRP,BATAVIA,IL 60510. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP BERNARD, CW (reprint author), WASHINGTON UNIV,DEPT PHYS,ST LOUIS,MO 63130, USA. NR 33 TC 43 Z9 43 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD FEB 1 PY 1992 VL 45 IS 3 BP 869 EP 874 DI 10.1103/PhysRevD.45.869 PG 6 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HB928 UT WOS:A1992HB92800019 ER PT J AU BURKARDT, M WARR, BJ AF BURKARDT, M WARR, BJ TI CHIRAL SYMMETRY AND THE CHARGE ASYMMETRY OF THE SSBAR DISTRIBUTION IN THE PROTON SO PHYSICAL REVIEW D LA English DT Article ID NUCLEON; SCATTERING; BREAKING AB Recently it has been suggested that a sizeable fraction of the strange and charm quarks in a nucleon-the so-called "intrinsic strangeness of charm"-have momentum distributions which extend to large x(bj). This effect is enhanced if these virtual heavy quarks live long enough so that many interactions with the rest of the nucleon can occur. It is shown that the same mechanism responsible for the intrinsic component also leads to a sizeable charge asymmetry of the corresponding spin and momentum distributions. RP BURKARDT, M (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305, USA. NR 31 TC 74 Z9 74 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD FEB 1 PY 1992 VL 45 IS 3 BP 958 EP 964 DI 10.1103/PhysRevD.45.958 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HB928 UT WOS:A1992HB92800031 ER PT J AU KRAKAUER, DA TALAGA, RL ALLEN, RC CHEN, HH HAUSAMMANN, R LEE, WP LU, XQ MAHLER, HJ WANG, KC BOWLES, TJ BURMAN, RL CARLINI, RD COCHRAN, DRF DOE, PJ FRANK, JS POTTER, ME SANDBERG, VD PIASETZKY, E AF KRAKAUER, DA TALAGA, RL ALLEN, RC CHEN, HH HAUSAMMANN, R LEE, WP LU, XQ MAHLER, HJ WANG, KC BOWLES, TJ BURMAN, RL CARLINI, RD COCHRAN, DRF DOE, PJ FRANK, JS POTTER, ME SANDBERG, VD PIASETZKY, E TI LIMIT ON FLAVOR-CHANGING NEUTRAL CURRENTS FROM A MEASUREMENT OF NEUTRINO-ELECTRON ELASTIC-SCATTERING SO PHYSICAL REVIEW D LA English DT Note AB From a measurement of the absolute cross section in nu(e)e- elastic scattering we have set a limit on flavor-changing neutral currents in the neutrino sector. We find that an off-diagonal, flavor-changing coupling is limited to 1 - f(ee) < 0.35 (90% C.L.). C1 UNIV MARYLAND,COLLEGE PK,MD 20742. UNIV CALIF IRVINE,IRVINE,CA 92717. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87544. TEL AVIV UNIV,RAYMOND & BEVERLY SACKLER FAC EXACT SCI,SCH PHYS & ASTRON,IL-52621 TEL HASHOMER,ISRAEL. RP KRAKAUER, DA (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 9 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 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD FEB 1 PY 1992 VL 45 IS 3 BP 975 EP 977 DI 10.1103/PhysRevD.45.975 PG 3 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HB928 UT WOS:A1992HB92800034 ER PT J AU ALBRIGHT, CH AF ALBRIGHT, CH TI CLASS OF MODELS LEADING TO DEPLETIONS OF SOLAR NU-E AND ATMOSPHERIC NU-MU FLUXES SO PHYSICAL REVIEW D LA English DT Note ID TOP-QUARK MASS; NEUTRINO OSCILLATIONS; INVARIANT FUNCTIONS; 17-KEV NEUTRINO; LEPTONIC DECAYS; PARTIAL WIDTHS; BETA-SPECTRUM; MATRICES; MATTER; NUMBER AB A model incorporating three left-handed SU(2)L x U(1)Y doublet neutrinos and three right-handed singlet neutrinos, with leptonic Dirac mass submatrices similar to empirical forms which work well for quarks, is required to yield both the nonadiabatic Mikheyev-Smirnov-Wolfenstein solar neutrino effect and the depleted flux of atmospheric muon neutrinos observed by Kamiokande. We find a small segment of the delta-m23(2) vs sin (2)2-theta-23 plane exists where such solutions can be achieved and identify the class of right-handed Majorana submatrices required. C1 FERMI NATL ACCELERATOR LAB, BATAVIA, IL 60510 USA. RP NO ILLINOIS UNIV, DEPT PHYS, DE KALB, IL 60115 USA. OI Albright, Carl/0000-0002-2252-6359 NR 56 TC 9 Z9 9 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 FEB 1 PY 1992 VL 45 IS 3 BP R725 EP R728 DI 10.1103/PhysRevD.45.R725 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HB928 UT WOS:A1992HB92800002 ER PT J AU MARCIANO, WJ AF MARCIANO, WJ TI TAU DECAY PUZZLE SO PHYSICAL REVIEW D LA English DT Note ID LEPTON AB Directly measured tau-decay branching ratios B(tau --> e-nu-nu-BAR), B(tau --> mu-nu-nu-BAR), B(tau --> nu(tau)pi/K), and B(tau --> nu(tau)pi--pi-0) are compared with standard-model predictions parametrized in terms of the tau-mass and lifetime. For current averages, m(tau) = 1784.1(-3.6)+2.7 MeV and tau(tau) = 3.04 +/- 0.07 x 10(-13) s, the experimental branching ratios are found to be systematically smaller than theory, thereby suggesting that significant reductions in the tau-lifetime or mass (perhaps both) are likely. If tau(tau) and m(tau) are correct, a heavy fourth-generation neutrino with m(nu-4) greater than or similar to 45.3 GeV and mixing sin 2-theta-34 congruent-to 0.06 could be the source of the discrepancy. RP MARCIANO, WJ (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 19 TC 31 Z9 31 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD FEB 1 PY 1992 VL 45 IS 3 BP R721 EP R724 DI 10.1103/PhysRevD.45.R721 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HB928 UT WOS:A1992HB92800001 ER PT J AU LAM, K BANERJEE, S AF LAM, K BANERJEE, S TI ON THE CONDITION OF STREAK FORMATION IN A BOUNDED TURBULENT-FLOW SO PHYSICS OF FLUIDS A-FLUID DYNAMICS LA English DT Article ID OPEN-CHANNEL FLOW; NUMERICAL-SIMULATION; FREE-SURFACE; WALL REGION; LAYER AB Flow between two surfaces at which no-slip and free-slip conditions can be imposed has been investigated numerically with a Fourier-Chebyshev pseudospectral method. Different mean shear rates have been applied to each boundary to study the effect of shear and boundary condition on the streaky structures that have been observed near walls in many previous investigations. In addition to the streaks found near the no-slip wall, the computations also reveal streaky structures when the free-slip surface is under a sufficiently high shear. The low-speed streaks observed near the free-slip surface, although appearing somewhat more pronounced, have much the same characteristics as the wall-layer streaks-e.g., the average spanwise spacing between the streaks both near the wall and the free surface is about 100 when normalized by the kinematic viscosity and the appropriate shear velocity (at the wall or at the free-slip surface). The results show that shear is much more important than the nature of the boundary in determining the dominant flow structure, rather unexpected since vortex lines can attach at a free-slip boundary whereas they cannot at a no-slip one. The formation of streaks appears to be governed by a local nondimensional shear parameter defined as S approximately = S \< u' w'>\/epsilon, where S is the mean shear rate, and < u' w' > and epsilon are the kinematic turbulent shear stress and rate of dissipation of turbulent kinetic energy, respectively. It is found that S congruent-to 1.0 is the condition at which the elongated low-speed streaky regions first appear. C1 UNIV CALIF SANTA BARBARA,DEPT CHEM & NUCL ENGN,SANTA BARBARA,CA 93106. RP LAM, K (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. NR 32 TC 108 Z9 110 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8213 J9 PHYS FLUIDS A-FLUID PD FEB PY 1992 VL 4 IS 2 BP 306 EP 326 DI 10.1063/1.858306 PG 21 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA HA083 UT WOS:A1992HA08300013 ER PT J AU BDZIL, JB KAPILA, AK AF BDZIL, JB KAPILA, AK TI SHOCK-TO-DETONATION TRANSITION - A MODEL PROBLEM SO PHYSICS OF FLUIDS A-FLUID DYNAMICS LA English DT Article AB The process by which a trigger ignited shockless weak detonation is transformed into a classical Zeldovich-von Neumann-Doering (ZND) detonation as the trigger wave decelerates is considered in detail. This occurs as the trigger speed passes through the Chapman-Jouguet velocity D(CJ). The model that is developed describes the birth and subsequent growth of a shock in the weak detonation reaction zone. This shock ultimately sustains the shock-ignited ZND detonation. The time-dependent solution presented here fills one of the many gaps in the understanding of detonation flows; an understanding based almost entirely on steady wave structures. C1 RENSSELAER POLYTECH INST,DEPT MATH SCI,TROY,NY 12180. RP BDZIL, JB (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,GRP M-7,MAIL STOP P952,LOS ALAMOS,NM 87545, USA. NR 14 TC 18 Z9 18 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8213 J9 PHYS FLUIDS A-FLUID PD FEB PY 1992 VL 4 IS 2 BP 409 EP 418 DI 10.1063/1.858312 PG 10 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA HA083 UT WOS:A1992HA08300019 ER PT J AU SHAING, KC AF SHAING, KC TI POLOIDAL MAGNETIC-FIELD DEPENDENCE OF THE EDGE ELECTRIC-FIELD LAYER WIDTH IN THE H-MODE IN TOKAMAKS SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Letter ID TRANSITION; ROTATION; BIFURCATION AB It is shown that when the complete effects of orbit squeezing are taken into account, the width of the edge radial electric field layer in the H mode as estimated from the ion orbit loss model does not depend explicitly on the poloidal magnetic field. RP SHAING, KC (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 15 TC 29 Z9 29 U1 1 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD FEB PY 1992 VL 4 IS 2 BP 290 EP 291 DI 10.1063/1.860276 PG 2 WC Physics, Fluids & Plasmas SC Physics GA HC432 UT WOS:A1992HC43200002 ER PT J AU OLIVER, BV RUDAKOV, LI MASON, RJ AUER, PL AF OLIVER, BV RUDAKOV, LI MASON, RJ AUER, PL TI SELF-SIMILAR MAGNETIC-FIELD PENETRATION OF A HOMOGENEOUS COLLISIONLESS PLASMA DUE TO ELECTRON VELOCITY ADVECTION SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Letter ID EROSION OPENING SWITCH; SIMULATION AB The velocity advection, m(e)(v(e).del)v(e), terms in the momentum equation for electrons in a collisionless plasma are shown to introduce an effective resistivity on the currents drawn from a bounding cathode. This leads to nonlinear diffusive penetration of an externally driven magnetic field, which at time t and height y above the cathode, penetrates to a depth-delta obeying the scaling-delta approximately (t/y)1/3. C1 IV KURCHATOV ATOM ENERGY INST,MOSCOW 123182,USSR. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP OLIVER, BV (reprint author), CORNELL UNIV,PLASMA STUDIES LAB,ITHACA,NY 14853, USA. NR 15 TC 20 Z9 20 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD FEB PY 1992 VL 4 IS 2 BP 294 EP 297 DI 10.1063/1.860277 PG 4 WC Physics, Fluids & Plasmas SC Physics GA HC432 UT WOS:A1992HC43200004 ER PT J AU SHAING, KC HAZELTINE, RD SANUKI, H AF SHAING, KC HAZELTINE, RD SANUKI, H TI SHOCK FORMATION IN A POLOIDALLY ROTATING TOKAMAK PLASMA SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID EDGE ELECTRIC-FIELD; L-H TRANSITION; TOROIDAL PLASMAS; NEOCLASSICAL TRANSPORT; MODE; GEOMETRY; EQUATION AB When the Mach number M(p) of the poloidal rotation in a tokamak approaches unity, the poloidal variations of plasma density and potential appear to have the characteristics of a shock whose front lies on a plane (ribbon) of a fixed poloidal angle eta-0. The shock first appears, when 1 - M(p) less-than-or-similar-to square-root epsilon (epsilon is the inverse aspect ratio), on the inside of the torus at a shock angle eta-0 greater-than-or-equal-to pi if the plasma rotates counterclockwise poloidally. As M(p) increases, eta-0 moves in the direction of the poloidal rotation. At M(p) = 1, eta-0 = 2-pi. When M(p) - 1 less-than-or-similar-to square-root epsilon, the shock angle is at eta-0 less-than-or-similar-to pi. The parallel viscosity associated with the shock is collisionality independent, in contrast to the conventional neoclassical viscosity. The viscosity reaches its maximum at M(p) = 1, which is the barrier that must be overcome to have a poloidal supersonic flow. Strong up-down asymmetric components of poloidal variations of plasma density and potential develop at M(p) congruent-to 1. In the edge region, the convective poloidal momentum transport weakens the parallel viscosity and facilitates the L-H transition. C1 UNIV TEXAS,INST FUS STUDIES,AUSTIN,TX 78712. NAGOYA UNIV,NATL INST FUS SCI,NAGOYA,AICHI 464,JAPAN. RP SHAING, KC (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 31 TC 54 Z9 54 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD FEB PY 1992 VL 4 IS 2 BP 404 EP 412 DI 10.1063/1.860290 PG 9 WC Physics, Fluids & Plasmas SC Physics GA HC432 UT WOS:A1992HC43200017 ER PT J AU WHITTUM, DH AF WHITTUM, DH TI NONLINEAR, RELATIVISTIC RETURN CURRENT SHEATH FOR AN ION-FOCUSED BEAM SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Note ID ELECTRON-BEAMS; PLASMA; LASER; PROPAGATION; REGIME AB The plasma equilibrium is analyzed for propagation in the ion-focused regime, of a high-current relativistic electron beam through a radially infinite, collisionless plasma. Beam current variation is assumed adiabatic over an electron plasma period and ion motion is neglected. The magnetohydrodynamic equations are reduced to a nonlinear ordinary differential equation describing the plasma return current sheath and solutions are characterized by the Budker parameter, with length scale set by the plasma skin depth. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 20 TC 5 Z9 5 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD FEB PY 1992 VL 4 IS 2 BP 476 EP 478 DI 10.1063/1.860244 PG 3 WC Physics, Fluids & Plasmas SC Physics GA HC432 UT WOS:A1992HC43200026 ER PT J AU CHENG, CZ AF CHENG, CZ TI KINETIC EXTENSIONS OF MAGNETOHYDRODYNAMICS FOR AXISYMMETRICAL TOROIDAL PLASMAS SO PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS LA English DT Review ID INTERNAL KINK MODES; ENERGETIC TRAPPED-PARTICLES; SHEAR ALFVEN EIGENMODE; FUSION ALPHA-PARTICLES; HIGH-BETA; MHD STABILITY; BALLOONING MODES; IGNITED TOKAMAK; CROSS-SECTION; IDEAL AB A nonvariational kinetic-MHD stability code (NOVA-K) has been developed to integrate non-He equations due to energetic particles in a general flux coordinate (psi, theta, zeta) system with an arbitrary Jacobian. The NOVA-K code employs the Galerkin method involving Fourier expansions in the generalized poloidal angle-theta and generalized toroidal angle-zeta directions, and cubic-B spline finite elements in the radial psi-direction. Extensive comparisons with the existing variational ideal MHD codes show that the NOVA-K code converges faster and gives more accurate results. We have employed the NOVA-K code to study the effects of energetic particles on MHD type modes: (1) the stabilization of ideal MHD internal kink modes and the excitation of "fishbone" internal kink modes; (2) the alpha-particle destabilization of toroidicity-induced Alfven eigenmodes (TAE) via transit and/or trapped particle resonances. Analytical theories are also presented to help explain the NOVA-K results. For energetic trapped particles generated by neutral-beam injection (NBI) and ion cyclotron resonant heating (ICRH), a stability window for the n = 1 internal kink mode in the hot particle beta space exists. On the other hand, the trapped alpha-particles can resonantly destabilize the n = 1 resonant fishbone mode even for total plasma-beta-value smaller than the beta-threshold value for the n = 1 ideal internal kink mode. Finally, we show that the TAE modes can be destabilized by alpha-particles via inverse Landau damping associated with the spatial gradient of the alpha-particle pressure with very low alpha-particle beta-threshold in the order of 10(-4) for major tokamak DT experiments. RP CHENG, CZ (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543, USA. RI Cheng, Chio/K-1005-2014 NR 74 TC 177 Z9 177 U1 2 U2 31 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 FEB PY 1992 VL 211 IS 1 BP 1 EP 51 DI 10.1016/0370-1573(92)90166-W PG 51 WC Physics, Multidisciplinary SC Physics GA HD976 UT WOS:A1992HD97600001 ER PT J AU CHILDS, WJ AF CHILDS, WJ TI OVERVIEW OF LASER-RADIOFREQUENCY DOUBLE-RESONANCE STUDIES OF ATOMIC, MOLECULAR, AND IONIC BEAMS SO PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS LA English DT Article ID RF DOUBLE-RESONANCE; HYPERFINE-STRUCTURE MEASUREMENTS; ELECTRIC-DIPOLE MOMENT; PERTURBATION-THEORY CALCULATIONS; CONSISTENT-FIELD CALCULATIONS; STARK-EFFECT MEASUREMENTS; OPTICAL DOUBLE-RESONANCE; HELIUM RYDBERG STATES; HIGH-PRECISION LASER; BAND DYE-LASERS AB The molecular-beam laser-rf double-resonance method, first demonstrated about 15 years ago, has been used extensively in the years since to study properties of many electronic levels of both neutral and ionic atoms and molecules. The technique affords high precision (typically 1 ppm for hyperfine structure measurements), very high selectivity, and high sensitivity. In addition to revealing a wealth of details concerning hyperfine interactions, the method, when applied to molecules, allows precise measurement of rotational structure and electric-dipole moments (through the Stark effect). In applying the method to studies of the analogous properties of atomic and molecular ions, arranging the ion and laser beams colinearly is usually advantageous and much work has been done in this area as well. This review illustrates the types of results achieved so far. The extent of agreement between theory and experiment and the impact of the method on the further development of the theory are discussed more briefly. The conclusion attempts to suggest profitable areas for further exploration. RP ARGONNE NATL LAB, ARGONNE, IL 60439 USA. NR 142 TC 27 Z9 27 U1 0 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 FEB PY 1992 VL 211 IS 3 BP 113 EP 165 DI 10.1016/0370-1573(92)90031-T PG 53 WC Physics, Multidisciplinary SC Physics GA HG679 UT WOS:A1992HG67900001 ER PT J AU DYBWAD, GL AF DYBWAD, GL TI IN SCIENCE-EDUCATION, WHATS FAIR IS FAIRS SO PHYSICS TODAY LA English DT Letter RP DYBWAD, GL (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 0 TC 1 Z9 1 U1 1 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD FEB PY 1992 VL 45 IS 2 BP 15 EP 15 DI 10.1063/1.2809520 PG 1 WC Physics, Multidisciplinary SC Physics GA HE480 UT WOS:A1992HE48000008 ER PT J AU LUBKIN, GB BLOCH, E BROWN, GE HEILMEIER, GH KLEPPNER, D LEDERMAN, LM NEAL, HA SCHMITT, RW TRIVELPIECE, AW GOODWIN, I AF LUBKIN, GB BLOCH, E BROWN, GE HEILMEIER, GH KLEPPNER, D LEDERMAN, LM NEAL, HA SCHMITT, RW TRIVELPIECE, AW GOODWIN, I TI ROUND-TABLE - SCIENCE UNDER STRESS SO PHYSICS TODAY LA English DT Article C1 MIT,PHYS,CAMBRIDGE,MA 02139. IBM CORP,ARMONK,NY 10504. NATL SCI FDN,WASHINGTON,DC 20550. DEF ADV RES PROJECTS AGCY,ARLINGTON,VA. TEXAS INSTRUMENTS INC,DALLAS,TX 75265. AMER ASSOC ADV SCI,WASHINGTON,DC 20036. UNIV CHICAGO,PHYS,CHICAGO,IL 60637. SUNY STONY BROOK,STONY BROOK,NY 11794. GE,SCHENECTADY,NY 12345. US DOE,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD FEB PY 1992 VL 45 IS 2 BP 38 EP 55 DI 10.1063/1.881330 PG 18 WC Physics, Multidisciplinary SC Physics GA HE480 UT WOS:A1992HE48000013 ER PT J AU LIEBMAN, JA EPSTEIN, L AF LIEBMAN, JA EPSTEIN, L TI ACTIVITY OF FUNGISTATIC COMPOUNDS FROM SOIL SO PHYTOPATHOLOGY LA English DT Article DE BIPOLARIS; HELMINTHOSPORIUM; MYCOSTASIS ID CONIDIAL GERMINATION; VICTORIAE CONIDIA; ETHYLENE; IDENTIFICATION; CARBON; FUNGI AB Propagules of many fungi do not germinate in soil unless provided with nutrients. According to the nutrient deprivation hypothesis, soil microflora prevent germination by acting as a sink for nutrients that leak from fungal propagules. Alternatively, soil microflora may produce germination inhibitors. In this study, fungistatic activity diffused from soil into agarose blocks and was quantified by percentage of germination of Cochliobolus victoriae conidia incubated on the blocks. The blocks were kept sterile and separate from soil by placement either on polycarbonate membranes with 0.2-mu-m pores (diffusion assay) or on glass (volatile assay). Conidia on membranes also were exposed to soil without agarose (direct assay). Four test soils were fungistatic and gave similar results in all assays. Agarose blocks became more fungistatic with increasing time on soil. Thin (2.5 mm) blocks became fungistatic more quickly than thick (7.5 mm) blocks, and blocks became fungistatic more quickly in the diffusion assay than in the volatile assay. Activity persisted in the blocks after removal from soil, and persisted longer when blocks were incubated in still rather than moving air. The results of this study do not support the nutrient deprivation hypothesis. Furthermore, the results indicate the occurrence of water-soluble, volatile, and possibly nonvolatile, fungistatic compound(s) in a variety of soils. RP LIEBMAN, JA (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT PLANT PATHOL,BERKELEY,CA 94720, USA. NR 40 TC 29 Z9 30 U1 1 U2 1 PU AMER PHYTOPATHOLOGICAL SOC PI ST PAUL PA 3340 PILOT KNOB ROAD, ST PAUL, MN 55121 SN 0031-949X J9 PHYTOPATHOLOGY JI Phytopathology PD FEB PY 1992 VL 82 IS 2 BP 147 EP 153 DI 10.1094/Phyto-82-147 PG 7 WC Plant Sciences SC Plant Sciences GA HC430 UT WOS:A1992HC43000005 ER PT J AU MORGAN, RJ BUTLER, NL AF MORGAN, RJ BUTLER, NL TI HYDROLYTIC DEGRADATION MECHANISM OF KEVLAR-49 FIBERS WHEN DISSOLVED IN SULFURIC-ACID SO POLYMER BULLETIN LA English DT Article ID AROMATIC POLYAMIDES; TEREPHTHALAMIDE) AB The hydrolytic degradation of Kevlar 49 fibers when dissolved in H2SO4 is characterized from (i) Fourier transform infrared (FTIR), CNH analyses and optical microscopy studies of insoluble crystals formed in the PPTA-H2SO4 dope and (ii) the rates of H2SO4-catalyzed hydrolysis of model compound aromatic amides. After hydrolysis of a PPTA amide linkage, the amide linkage adjacent to the freshly formed - COOH macromolecular end group rapidly hydrolyses resulting in the formation of terephthalic acid which then forms insoluble crystals in the PPTA-H2SO4 dope. C1 UNIV CALIF DAVIS,DEPT MAT SCI,LIVERMORE,CA 94550. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP MORGAN, RJ (reprint author), MICHIGAN MOLEC INST,COMPOSITES LAB,MIDLAND,MI 48640, USA. NR 12 TC 8 Z9 8 U1 2 U2 8 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-0839 J9 POLYM BULL JI Polym. Bull. PD FEB PY 1992 VL 27 IS 6 BP 689 EP 696 DI 10.1007/BF00297440 PG 8 WC Polymer Science SC Polymer Science GA HF140 UT WOS:A1992HF14000014 ER PT J AU LYON, RE SCHUMANN, DL AF LYON, RE SCHUMANN, DL TI DETERMINATION OF MATRIX-DOMINATED MECHANICAL-PROPERTIES OF FIBER COMPOSITE LAMINA SO POLYMER COMPOSITES LA English DT Article AB A test methodology that utilizes unidirectional, hoop-wound tubes to determine matrix-dominated mechanical properties of unidirectional fiber composite lamina is described. Longitudinal shear modulus and strength as well as transverse Young's modulus, transverse tensile strength. and transverse compressive strength are obtained from a single thin-walled tube specimen and fixturing design. Data presented for two carbon-fiber-reinforced epoxy composite materials illustrate the simplicity and precision of the described procedure. RP LYON, RE (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,DIV MAT,POLYMER COMPOSITES GRP,LIVERMORE,CA 94550, USA. NR 7 TC 3 Z9 3 U1 0 U2 2 PU SOC PLASTICS ENG INC PI BROOKFIELD CENTER PA 14 FAIRFIELD DR, BROOKFIELD CENTER, CT 06804-0403 SN 0272-8397 J9 POLYM COMPOSITE JI Polym. Compos. PD FEB PY 1992 VL 13 IS 1 BP 1 EP 6 DI 10.1002/pc.750130102 PG 6 WC Materials Science, Composites; Polymer Science SC Materials Science; Polymer Science GA HF144 UT WOS:A1992HF14400001 ER PT J AU SAINZ, J PEVNY, L WU, Y CANTOR, CR SMITH, CL AF SAINZ, J PEVNY, L WU, Y CANTOR, CR SMITH, CL TI DISTRIBUTION OF INTERSPERSED REPEATS (ALU AND KPN) ON NOT-I RESTRICTION FRAGMENTS OF HUMAN CHROMOSOME-21 SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE PULSED-FIELD GEL ELECTROPHORESIS; PHYSICAL MAPPING; GENOMIC ORGANIZATION ID REPEATED DNA-SEQUENCES; HUMAN GENOME; ALZHEIMERS-DISEASE; FAMILY; REGION; EVOLUTION; ELEMENTS; LINES; GENE; END AB Interspersed repeated sequences (Alu and Kpn) were used as probes to detect a set of Not I restriction fragments of human chromosome 21 from the hybrid cell line WAV17. Forty different Not I fragments, ranging in size from < 0.05 megabase (Mb) to 7.0 Mb, were identified. The total length of these fragments was 47.3 Mb. This length provides an estimate of the minimum size of the chromosome and a minimum number of fragments to be ordered to create a complete restriction map. The average length Not I fragment is 1.2 Mb. Alu and Kpn fragments are not always coincident: a 2.9-Mb fragment is detected with Kpn but not with Alu, and 13 fragments, ranging from < 0.05 Mb to 5.6 Mb, are detected with Alu but not with Kpn; the 26 remaining fragments, covering 75% (35.3 Mb) of the total length, are detected with both repetitive probes. The presence of so many noncoincident fragments and the high variation of the hybridization signal intensities of the fragments suggest a very nonuniform distribution of Kpn and Alu repeats. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM DYNAM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT MOLEC & CELL BIOL,BERKELEY,CA 94720. COLUMBIA UNIV COLL PHYS & SURG,DEPT GENET & DEV,NEW YORK,NY 10032. OI Smith, Cassandra/0000-0002-0346-8907 FU NCI NIH HHS [CA39782] NR 44 TC 23 Z9 23 U1 0 U2 0 PU NATL ACAD PRESS PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD FEB 1 PY 1992 VL 89 IS 3 BP 1080 EP 1084 DI 10.1073/pnas.89.3.1080 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HC385 UT WOS:A1992HC38500064 PM 1736290 ER PT J AU ANDERSON, KM SEED, TM HARRIS, JE AF ANDERSON, KM SEED, TM HARRIS, JE TI DIFFERENTIAL-EFFECTS OF ETYA, A PUFA-ANALOG, ON PROSTATE (PC3) AND MONOBLASTOID U937 ULTRASTRUCTURE - LACK OF CORRELATION WITH REDUCED PROLIFERATION SO PROSTAGLANDINS LEUKOTRIENES AND ESSENTIAL FATTY ACIDS LA English DT Article ID ARACHIDONIC-ACID METABOLISM; UNSATURATED FATTY-ACIDS; 5,8,11,14-EICOSATETRAYNOIC ACID; LIPID-PEROXIDATION; DNA-SYNTHESIS; MITOCHONDRIA; FIBROBLASTS; INHIBITION; CELLS; PC-3 AB ETYA (5,8,11,14-eicosatetraynoic acid), a polyunsaturated fatty acid analogue, inhibits proliferation of PC3 and U937 cells and induces a limited differentiation in U937 cells. Human prostate PC3 cells cultured for 72 h with 40-mu-M ETYA in fetal calf serum contained putative lipofuscin bodies, myelin figures and mitochondria with damaged cristae and matrices. These changes were absent from human U937 monoblastoid cells incubated with ETYA in CPSR3, a semipurified serum replacement. U937 cells cultured with ETYA in fetal calf serum contained occasional lipofuscin bodies, while PC3 cells cultured in CPSR3 exhibited all of the changes described. ETYA reduced the oxygen consumption of both cell lines. Therefore we conclude: (a) The response to ETYA by cells of dissimilar developmental origin is not identical; (b) unidentified serum components can augment potential ETYA-induced oxidative stress-responses of cells; (c) inhibition of U937 proliferation by ETYA does not depend upon the morphologic changes seen in PC3 cells, which resemble sequelae of oxidative stress with excess free radicals; and (d) rapid ETYA-induced inhibition of oxygen consumption in both cell lines implies a reduced synthesis of ATP that could contribute to the reversible impairment of cellular proliferation. C1 RUSH MED COLL,DEPT INTERNAL MED,CHICAGO,IL 60612. RUSH MED COLL,DEPT BIOCHEM,CHICAGO,IL 60612. ARGONNE NATL LAB,DIV BIOL & MED RES,ARGONNE,IL 60439. RP ANDERSON, KM (reprint author), RUSH MED COLL,MED ONCOL SECT,1725 W HARRISON ST,SUITE 830,CHICAGO,IL 60612, USA. NR 34 TC 2 Z9 2 U1 0 U2 1 PU CHURCHILL LIVINGSTONE PI EDINBURGH PA JOURNAL PRODUCTION DEPT, ROBERT STEVENSON HOUSE, 1-3 BAXTERS PLACE, LEITH WALK, EDINBURGH, MIDLOTHIAN, SCOTLAND EH1 3AF SN 0952-3278 J9 PROSTAG LEUKOTR ESS JI Prostaglandins Leukot. Essent. Fatty Acids PD FEB PY 1992 VL 45 IS 2 BP 151 EP 157 DI 10.1016/0952-3278(92)90232-8 PG 7 WC Biochemistry & Molecular Biology; Cell Biology; Endocrinology & Metabolism SC Biochemistry & Molecular Biology; Cell Biology; Endocrinology & Metabolism GA HD391 UT WOS:A1992HD39100008 PM 1561235 ER PT J AU CLARAGE, JB CLARAGE, MS PHILLIPS, WC SWEET, RM CASPAR, DLD AF CLARAGE, JB CLARAGE, MS PHILLIPS, WC SWEET, RM CASPAR, DLD TI CORRELATIONS OF ATOMIC MOVEMENTS IN LYSOZYME CRYSTALS SO PROTEINS-STRUCTURE FUNCTION AND GENETICS LA English DT Article DE THERMAL DIFFUSE X-RAY SCATTERING; PROTEIN DISORDER; MOLECULAR DYNAMICS ID THERMAL MOTION; DYNAMICS; SCATTERING; MYOGLOBIN AB Diffuse scattering data have been collected on two crystal forms of lysozyme, tetragonal and triclinic, using synchrotron radiation. The observed diffraction patterns were simulated using an exact theory for simple model crystals which relates the diffuse scattering intensity distribution to the amplitudes and correlations of atomic movements. Although the mean square displacements in the tetragonal form are twice that in the triclinic crystal, the predominent component of atomic movement in both crystals is accounted for by short-range coupled motions where displacement correlations decay exponentially as a function of atomic separation, with a relaxation distance of almost-equal-to 6 angstrom. Lattice coupled movements with a correlation distance almost-equal-to 50 angstrom account for only about 5-10% of the total atomic mean square displacements in the protein crystals. The results contradict various presumptions that the disorder in protein crystals can be modeled predominantly by elastic vibrations or rigid body movements. C1 BRANDEIS UNIV,ROSENSTIEL BASIC MED SCI RES CTR,WALTHAM,MA 02254. BRANDEIS UNIV,DEPT PHYS,WALTHAM,MA 02254. BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. FU NCI NIH HHS [CA47439] NR 32 TC 59 Z9 60 U1 0 U2 4 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0887-3585 J9 PROTEINS JI Proteins PD FEB PY 1992 VL 12 IS 2 BP 145 EP 157 DI 10.1002/prot.340120208 PG 13 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA HA875 UT WOS:A1992HA87500007 PM 1603804 ER PT J AU TSUBOI, K YANG, TC CHEN, DJ AF TSUBOI, K YANG, TC CHEN, DJ TI CHARGED-PARTICLE MUTAGENESIS .1. CYTOTOXIC AND MUTAGENIC EFFECTS OF HIGH-LET CHARGED IRON PARTICLES ON HUMAN SKIN FIBROBLASTS SO RADIATION RESEARCH LA English DT Article ID CULTURED MAMMALIAN-CELLS; ACCELERATED HEAVY-IONS; DNA STRAND BREAKS; MUTATION-INDUCTION; CHINESE-HAMSTER; ALPHA-PARTICLES; X-RAYS; INACTIVATION; RADIATIONS; BEAMS C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CELLULAR & MOLEC BIOL,BERKELEY,CA 94720. NR 22 TC 60 Z9 67 U1 0 U2 0 PU RADIATION RESEARCH SOC PI OAK BROOK PA 2021 SPRING RD, STE 600, OAK BROOK, IL 60521 SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD FEB PY 1992 VL 129 IS 2 BP 171 EP 176 DI 10.2307/3578154 PG 6 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA HD284 UT WOS:A1992HD28400006 PM 1734447 ER PT J AU MCKONE, TE BOGEN, KT AF MCKONE, TE BOGEN, KT TI UNCERTAINTIES IN HEALTH-RISK ASSESSMENT - AN INTEGRATED CASE-STUDY BASED ON TETRACHLOROETHYLENE IN CALIFORNIA GROUNDWATER SO REGULATORY TOXICOLOGY AND PHARMACOLOGY LA English DT Article ID VOLATILE ORGANIC-COMPOUNDS; EXPOSURE; WATER; TRICHLOROETHYLENE; MODELS RP MCKONE, TE (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,POB 5507,L-453,LIVERMORE,CA 94550, USA. NR 31 TC 47 Z9 48 U1 0 U2 5 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0273-2300 J9 REGUL TOXICOL PHARM JI Regul. Toxicol. Pharmacol. PD FEB PY 1992 VL 15 IS 1 BP 86 EP 103 DI 10.1016/0273-2300(92)90087-P PG 18 WC Medicine, Legal; Pharmacology & Pharmacy; Toxicology SC Legal Medicine; Pharmacology & Pharmacy; Toxicology GA HB585 UT WOS:A1992HB58500011 PM 1553416 ER PT J AU PAI, SR KUBITSCHEK, HE AF PAI, SR KUBITSCHEK, HE TI CATABOLIC POOLS IN ESCHERICHIA-COLI SO RESEARCH IN MICROBIOLOGY LA English DT Article DE BACTERIAL GROWTH, ESCHERICHIA-COLI; METABOLISM, NUTRITION, ANABOLIC AND CATABOLIC POOLS, INCORPORATION ID PROTEINS; GROWTH AB Methods are described for measuring soluble pool magnitudes in steady-state or exponentially growing cultures, and for distinguishing between anabolic, catabolic and total metabolic pools within cells. These methods were applied to the measurement of pool magnitudes for several amino acids and other precursors in Escherichia coli THU. Our results support the independence of the magnitudes of total metabolic pools and growth rate in steady-state cultures. Our results also show that the total metabolic pool size is much larger than previously published estimates, which failed to include the contribution of catabolic pools. The average value of the total soluble material in exponential-phase cells is estimated to be 8 to 9 % of the cell dry mass; pool values could be almost twice as large during midcycle because of the known increase in the magnitudes of protein and RNA precursor pool during the cell cycle. C1 ARGONNE NATL LAB,DIV BIOL ENVIRONM & MED RES,ARGONNE,IL 60439. FU PHS HHS [R01 A121954] NR 21 TC 3 Z9 3 U1 0 U2 3 PU EDITIONS SCIENTIFIQUES ELSEVIER PI PARIS CEDEX 15 PA 141 RUE JAVEL, 75747 PARIS CEDEX 15, FRANCE SN 0923-2508 J9 RES MICROBIOL JI Res. Microbiol. PD FEB PY 1992 VL 143 IS 2 BP 173 EP 181 DI 10.1016/0923-2508(92)90006-A PG 9 WC Microbiology SC Microbiology GA HK343 UT WOS:A1992HK34300006 PM 1410792 ER PT J AU WAKATSUKI, S HODGSON, KO ELIEZER, D RICE, M HUBBARD, S GILLIS, N DONIACH, S SPANN, U AF WAKATSUKI, S HODGSON, KO ELIEZER, D RICE, M HUBBARD, S GILLIS, N DONIACH, S SPANN, U TI SMALL-ANGLE X-RAY-SCATTERING DIFFRACTION SYSTEM FOR STUDIES OF BIOLOGICAL AND OTHER MATERIALS AT THE STANFORD-SYNCHROTRON-RADIATION-LABORATORY SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article AB A versatile small-angle x-ray diffraction/scattering system has been developed at Stanford Synchrotron Radiation Laboratory for studies of biological and other materials. The system includes two sets of collimation slits separated by an ionization chamber, a sample holder cooled by a circulation bath, a vacuum/He scattering path after the sample holder and a detector, either a linear one-dimensional position-sensitive proportional counter or a position-sensitive quadrant detector. Data aquisition is controlled by a VAXstation through a CAMAC interface. Menu-driven data acquisition and on-line analysis software has been developed. The system can be used to collect small- to intermediate-angle x-ray scattering and diffraction data. Monochromatic, anomalous, and time-resolved scattering/diffraction experiments are possible. A time-resolved spectrophotometer using photodiode arrays has also been developed for simultaneous measurements of optical absorption spectra and x-ray scattering/diffraction. C1 STANFORD UNIV,DEPT PHYS,STANFORD,CA 94305. STANFORD UNIV,DEPT ELECT ENGN,STANFORD,CA 94305. STANFORD UNIV,DEPT APPL PHYS,STANFORD,CA 94305. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94309. RP WAKATSUKI, S (reprint author), STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305, USA. NR 14 TC 37 Z9 37 U1 0 U2 7 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD FEB PY 1992 VL 63 IS 2 BP 1736 EP 1740 DI 10.1063/1.1143332 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HC465 UT WOS:A1992HC46500014 ER PT J AU SMITHER, RK LEE, W MACRANDER, A MILLS, D ROGERS, S AF SMITHER, RK LEE, W MACRANDER, A MILLS, D ROGERS, S TI RECENT EXPERIMENTS WITH LIQUID GALLIUM COOLING OF CRYSTAL DIFFRACTION OPTICS SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID UNDULATOR AB The x-ray beams for the next generation of synchrotrons will contain much more power (1-10 kW) than is available at present day facilities. Cooling the first optical components in these beam lines will require the best cooling technology that one can bring to bear. Argonne continues to pioneer the use of liquid metals as the cooling fluid and has adopted liquid gallium as the liquid metal of choice. Its low melting point, 29.7-degrees-C and its very low vapor pressure make it an easy fluid to handle and its high thermal conductivity and heat capacity make it an excellent cooling fluid. A series of experiments were performed during April 1991 with the wiggler beam at the F2 station of the CHESS facility at Cornell to investigate the cooling of large areas of high power. Two types of cooling crystal geometries were tested. One where the cooling channels were core drilled just below the surface of the crystal and a second where slots were cut into the crystal just below the surface with a diamond saw. Both crystals performed well with photon beam powers up to 1050 W and power densities of up to 14.5 W/mm2 at normal incidence. An infrared camera was used to measure the variation in the temperature of the top layer of the silicon crystals. For the core-drilled crystal the peak temperature measured at the center of the beam at a power density of 12.3 W/mm2 was 15-degrees-C hotter than the crystal surface outside of the beam with a flow of liquid gallium of 2 gpm (gallons per minute) and was 10-degrees-C with a flow of 4 gpm. The maximum distortion of the crystal surface distortion of the core-drilled crystal was about +/- 2.0 arcsec for the 2 gpm case with a maximum power density of 10.9 W/mm2 and about 5% of the expected beam intensity was lost at peak power of 14.5 W/mm2. For the slotted crystal the peak temperature difference for a peak power of 10.9 W/mm2 was 3.5-degrees-C and 2.0-degrees-C for liquid gallium flows of 1 gpm and 2 gpm, respectively. No intensity loss was measured for the maximum power density of 14.5 W/mm2. The fact that the peak temperature difference on the surface of both crystals was decreasing with increased flow of liquid gallium suggests that even higher power densities can be accommodated with higher flows of liquid gallium. RP SMITHER, RK (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 5 TC 16 Z9 16 U1 1 U2 7 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD FEB PY 1992 VL 63 IS 2 BP 1746 EP 1754 DI 10.1063/1.1143334 PG 9 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HC465 UT WOS:A1992HC46500016 ER PT J AU SMITHER, RK FERNANDEZ, PB AF SMITHER, RK FERNANDEZ, PB TI VARIABLE-METRIC DIFFRACTION CRYSTALS FOR X-RAY OPTICS SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article AB A variable-metric (VM) crystal is one in which the spacing between the crystalline planes changes with position in the crystal. This variation can be either parallel to the crystalline planes or perpendicular to the crystalline planes of interest and can be produced by either introducing a thermal gradient in the crystal or by growing a crystal made of two or more elements and changing the relative percentages of the two elements as the crystal is grown. A series of experiments were performed in the laboratory to demonstrate the principle of the variable-metric crystal and its potential use in synchrotron beam lines. One of the most useful applications of the VM crystal is to increase the number of photons per unit bandwidth in a diffracted beam without losing any of the overall intensity. In a normal synchrotron beam line that uses a two-crystal monochromator, the bandwidth of the diffracted photon beam is determined by the vertical opening angle of the beam which is typically 0.10-0.30 mrad or 20-60 arcsec. When the VM crystal approach is applied, the bandwidth of the beam can be made as narrow as the rocking curve of the diffracting crystal, which is typically 0.005-0.050 mrad or 1-10 arcsec. Thus a very large increase of photons per unit bandwidth (or per unit energy) can be achieved through the use of VM crystals. When the VM principle is used with bent crystals, new kinds of x-ray optical elements can be generated that can focus and defocus x-ray beams much like simple lenses where the focal length of the lens can be changed to match its application. Thus both large magnifications and large demagnifications can be achieved as well as parallel beams with narrow bandwidths. RP SMITHER, RK (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 2 TC 8 Z9 8 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD FEB PY 1992 VL 63 IS 2 BP 1755 EP 1762 DI 10.1063/1.1143335 PG 8 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HC465 UT WOS:A1992HC46500017 ER PT J AU HARBOTTLE, G WEIGAND, PC AF HARBOTTLE, G WEIGAND, PC TI TURQUOISE IN PRE-COLUMBIAN AMERICA SO SCIENTIFIC AMERICAN LA English DT Article C1 MUSEUM NO ARIZONA,FLAGSTAFF,AZ. RP HARBOTTLE, G (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 4 TC 18 Z9 18 U1 0 U2 4 PU SCI AMERICAN INC PI NEW YORK PA 415 MADISON AVE, NEW YORK, NY 10017 SN 0036-8733 J9 SCI AM JI Sci.Am. PD FEB PY 1992 VL 266 IS 2 BP 78 EP & PG 0 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HA260 UT WOS:A1992HA26000013 ER PT J AU NISHIMURA, C LIU, CT AF NISHIMURA, C LIU, CT TI REACTION SINTERING OF NI3AL TO NEAR FULL DENSITY SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article ID TEMPERATURE C1 OAK RIDGE NATL LAB,DIV MET CERAM,OAK RIDGE,TN 37831. OI Liu, Chain Tsuan/0000-0001-7888-9725 NR 13 TC 24 Z9 25 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0956-716X J9 SCRIPTA METALL MATER JI Scr. Metall. Materialia PD FEB 1 PY 1992 VL 26 IS 3 BP 381 EP 385 DI 10.1016/0956-716X(92)90616-M PG 5 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA HA574 UT WOS:A1992HA57400008 ER PT J AU HENDRICKSON, B AF HENDRICKSON, B TI CONDITIONS FOR UNIQUE GRAPH REALIZATIONS SO SIAM JOURNAL ON COMPUTING LA English DT Article DE GRAPH EMBEDDINGS; GRAPH REALIZATIONS; GRAPH ALGORITHMS; RIGID GRAPHS; CONNECTIVITY ID RIGIDITY; PLANE AB The graph realization problem is that of computing the relative locations of a set of vertices placed in Euclidean space, relying only upon some set of inter-vertex distance measurements. This paper is concerned with the closely related problem of determining whether or not a graph has a unique realization. Both these problems are NP-hard, but the proofs rely upon special combinations of edge lengths. If one assumes the vertex locations are unrelated, then the uniqueness question can be approached from a purely graph theoretic angle that ignores edge lengths. This paper identifies three necessary graph theoretic conditions for a graph to have a unique realization in any dimension. Efficient sequential and NC algorithms are presented for each condition, although these algorithms have very different flavors in different dimensions. RP SANDIA NATL LABS, DEPT MATH & COMP SCI, ALBUQUERQUE, NM 87185 USA. NR 39 TC 225 Z9 230 U1 0 U2 1 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA SN 0097-5397 EI 1095-7111 J9 SIAM J COMPUT JI SIAM J. Comput. PD FEB PY 1992 VL 21 IS 1 BP 65 EP 84 DI 10.1137/0221008 PG 20 WC Computer Science, Theory & Methods; Mathematics, Applied SC Computer Science; Mathematics GA HE397 UT WOS:A1992HE39700008 ER PT J AU DEB, SK AF DEB, SK TI OPPORTUNITIES AND CHALLENGES OF ELECTROCHROMIC PHENOMENA IN TRANSITION-METAL OXIDES SO SOLAR ENERGY MATERIALS AND SOLAR CELLS LA English DT Article ID TUNGSTEN-OXIDE; COLOR-CENTERS; THIN-FILMS; WO3; DEPENDENCE; TRIOXIDE; WINDOWS AB During the past two decades, electrochromic phenomena in transition metal oxides have been very widely studied. This unique phenomenon of electrically induced reversible coloration and charge storage in thin films has diverse applications that range from information display to neural networking in optical computation. Electrochromic devices using metal oxides can be classified into two broad categories (1) all-solid-state systems, and (2) semi-solid systems involving wet electrolytes. The principles underlying the operation of both systems appear quite similar, but there remain both scientific and technological issues that are poorly understood. In this paper we briefly discuss some of the opportunities and challenges for the application of electrochromic phenomena in transition metal oxides. RP SOLAR ENERGY RES INST, GOLDEN, CO 80401 USA. NR 23 TC 83 Z9 86 U1 3 U2 18 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-0248 EI 1879-3398 J9 SOL ENERG MAT SOL C JI Sol. Energy Mater. Sol. Cells PD FEB PY 1992 VL 25 IS 3-4 BP 327 EP 338 DI 10.1016/0927-0248(92)90077-3 PG 12 WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied SC Energy & Fuels; Materials Science; Physics GA HP912 UT WOS:A1992HP91200011 ER PT J AU EHRLICH, SN CHAPMAN, LD LAZARZ, NM AF EHRLICH, SN CHAPMAN, LD LAZARZ, NM TI A TIME-RESOLVED X-RAY-DIFFRACTION STUDY OF HOT PHONONS IN QUARTZ SO SOLID STATE COMMUNICATIONS LA English DT Article ID LASER RADIATION; SCATTERING AB We have performed a time-resolved x-ray diffraction study of hot (non-equilibrium) phonons in alpha-quartz at low temperatures. The phonon generation mechanism is direct stimulation of transverse-optical (TO) phonons by infrared light excitation using a powerful Q switched CO2 laser with the intent of possibly understanding how the excited system then approaches equilibrium. Also we hoped to demonstrate that time-resolved x-ray scattering can give useful information on the time and spatial evolution of this path to equilibrium. We have observed temporal diffuse scattering peaks at various wavevectors which confirm the presence of non-equilibrium phonons generated by the initial laser excitation. We have observed the zone center TO phonons directly excited by the laser pulse. Some of the later diffuse scattering peaks have been identified as acoustic phonon decay products, while other peaks have not yet been identified. Possible origins of these peaks are given. C1 PURDUE UNIV,SCH MAT ENGN,W LAFAYETTE,IN 47907. RP EHRLICH, SN (reprint author), BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE,UPTON,NY 11973, USA. NR 12 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD FEB PY 1992 VL 81 IS 6 BP 451 EP 456 DI 10.1016/0038-1098(92)90591-V PG 6 WC Physics, Condensed Matter SC Physics GA HG461 UT WOS:A1992HG46100002 ER PT J AU ALDE, D BELLAZZINI, R BENCHEIKH, B BINON, FG BOUTEMEUR, M BREZ, A BRICMAN, C CHIKOVANI, EG DONSKOV, SV GOUANERE, M INABA, S INYAKIN, AV KACHANOV, VA KHAUSTOV, GV KNAPP, EA KOBAYASHI, M KULIK, AV LANDSBERG, GL LEDNEV, AA MASSAI, MM NAKAMURA, T PEIGNEUX, JP POLOVNIKOV, SA POULET, M PROKOSHKIN, YD SADOVSKII, SA SAMOILENKO, VD SHAGIN, PM SHTANNIKOV, AV SINGOVSKII, AV STROOT, JP SUGONYAEV, VP TABIDZE, MD TAKAMATSU, K TORQUATI, MR TSURU, T AF ALDE, D BELLAZZINI, R BENCHEIKH, B BINON, FG BOUTEMEUR, M BREZ, A BRICMAN, C CHIKOVANI, EG DONSKOV, SV GOUANERE, M INABA, S INYAKIN, AV KACHANOV, VA KHAUSTOV, GV KNAPP, EA KOBAYASHI, M KULIK, AV LANDSBERG, GL LEDNEV, AA MASSAI, MM NAKAMURA, T PEIGNEUX, JP POLOVNIKOV, SA POULET, M PROKOSHKIN, YD SADOVSKII, SA SAMOILENKO, VD SHAGIN, PM SHTANNIKOV, AV SINGOVSKII, AV STROOT, JP SUGONYAEV, VP TABIDZE, MD TAKAMATSU, K TORQUATI, MR TSURU, T TI STUDY OF THE OMEGA-PI(0) SYSTEM AT HIGH MASSES SO SOVIET JOURNAL OF NUCLEAR PHYSICS-USSR LA English DT Article ID PI-P COLLISIONS; NARROW MESON; GEV/C-PI; ETA; G(1590) AB The first results are presented on the study of the omega-pi-0 system produced in the charge-exchange reaction of pi-p scattering at the momenta 38 and 100 GeV/c. Together with the well known b1(0) (1235) and rho-3 (1690) mesons, in the mass spectrum of the omega-pi-0 system one observes a new neutral state with mass 2200 +/- 20 MeV and width 260 +/- 50 MeV, produced, like the rho-3, via one-pion exchange. This meson, X(2200), is a candidate for the 1- -multiplet. A possible interpretation is that it is a 2(3)D1 radial excitation of the rho-0 meson. Its production cross section at 38 GeV/c is sigma[pi-p --> X(2200)n]BR[X(2200) --> omega-pi-0] = 120 +/- 25 nb, and it falls off quadratically with increasing energy, which is consistent with one-pion exchange. C1 INST INTERUNIV SCI NUCL,BRUSSELS,BELGIUM. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87544. LAB ANNECY LE VIEUX PHYS PARTICULES,ANNECY LE VIEUX,FRANCE. KEK NAT LAB HIGH ENERGY PHYS,NATL LAB HIGH ENERGY PHYS,TSUKUBA,JAPAN. UNIV PISA,I-56100 PISA,ITALY. IST NAZL FIS NUCL,PISA,ITALY. TBILISI STATE UNIV,HIGH ENERGY PHYS RES INST,TBILISI,GEORGIA,USSR. UNIV LIBRE BRUXELLES,B-1050 BRUSSELS,BELGIUM. CERN,CH-1211 GENEVA 23,SWITZERLAND. MIYAZAKI UNIV,MIYAZAKI 880,JAPAN. RP ALDE, D (reprint author), HIGH ENERGY PHYS INST,PROTVINO,USSR. NR 21 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0038-5506 J9 SOV J NUCL PHYS+ PD FEB PY 1992 VL 55 IS 2 BP 226 EP 229 PG 4 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA HR573 UT WOS:A1992HR57300010 ER PT J AU KAFAFI, SA LAFEMINA, JP SCHENTER, GK AF KAFAFI, SA LAFEMINA, JP SCHENTER, GK TI THE ELECTRONIC-STRUCTURE AND CONFORMATION OF DIMETHYLAMINOBENZONITRILE SO STRUCTURAL CHEMISTRY LA English DT Article AB Ab initio molecular orbital (MO) computations on the closed shell singlet ground state of N, N-dimethylaminobenzonitrile (DMABN) are reported. Fully optimized structures of several conformers of DMABN were calculated at the HF/6-31 G level of theory. Our results indicate that for each of these conformations the minimum energy structure has a trigonal (sp2 hybridized) amino nitrogen. The most stable DMABN conformer was found to be planar with its methyl groups eclipsed. The Koopmans ionization potentials and dipole moments of the various ground state conformers are compared. The implications for dynamical models of twisted-intramolecular charge transfer (TICT) are discussed. Moreover, the use of qualitative MO theory arguments provides an interpretation of the computational results in a simple orbital interaction framework. C1 PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. RP KAFAFI, SA (reprint author), JOHNS HOPKINS UNIV HOSP, DIV ENVIRONM CHEM, 615 N WOLFE ST, BALTIMORE, MD 21205 USA. RI Schenter, Gregory/I-7655-2014 OI Schenter, Gregory/0000-0001-5444-5484 NR 19 TC 1 Z9 1 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 1040-0400 J9 STRUCT CHEM JI Struct. Chem. PD FEB PY 1992 VL 3 IS 1 BP 9 EP 14 DI 10.1007/BF00671975 PG 6 WC Chemistry, Multidisciplinary; Chemistry, Physical; Crystallography SC Chemistry; Crystallography GA JV543 UT WOS:A1992JV54300002 ER PT J AU SALEMSUGUI, S SHI, D MCFARLAND, SE AF SALEMSUGUI, S SHI, D MCFARLAND, SE TI INCREASED IRREVERSIBILITY LINE BY PRECIPITATE PINNING IN THE BI-SR-CA-CU-O SYSTEM SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; METAL-OXIDE GLASSES; FLUX CREEP; CRITICAL CURRENTS; LATTICE; MOTION; STATE; PHASE; FIELD AB We measured magnetic irreversibility, H*(T), in liquid-quenched Bi-Sr-Ca-Cu-O samples with various microstructures at high applied field (up to 7 T). We found that H*(T) is considerably increased in the Bi2Sr2Ca3Cu4Ox (2234) sample with a large number of crystal defects, including severe lattice distortion and calcium and copper rich precipitates. We argue that the lattice distortion may affect the degree of anisotropy and the Josephson coupling between the Cu-O layers, which in turn enhance the irreversibility in the Bi-Sr-Ca-Cu-O system. A critical-current density, J(c), of 8 x 10(4) A cm-2 at 8 kG and 40 K was obtained in the 2234 sample with many defects, while the J(c) dropped significantly at the same temperature and field in the near stoichiometry Bi2Sr2Ca2Cu3Ox (2223) sample with a uniform microstructure. RP SALEMSUGUI, S (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 30 TC 2 Z9 2 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-2048 J9 SUPERCOND SCI TECH JI Supercond. Sci. Technol. PD FEB PY 1992 VL 5 IS 2 BP 73 EP 77 DI 10.1088/0953-2048/5/2/007 PG 5 WC Physics, Applied; Physics, Condensed Matter SC Physics GA HH268 UT WOS:A1992HH26800007 ER PT J AU FU, SS SOMORJAI, GA AF FU, SS SOMORJAI, GA TI INTERACTIONS OF O2, CO, CO2, AND D2 WITH THE STEPPED CU(311) CRYSTAL-FACE - COMPARISON TO CU(110) SO SURFACE SCIENCE LA English DT Article ID METHANOL SYNTHESIS; ZINC-OXIDE; CATALYSTS; COPPER; ADSORPTION; HYDROGEN; SURFACES; SUPPORT; CU/ZNO AB Carbon dioxide is shown to chemisorb and dissociate to carbon monoxide and atomic oxygen on Cu(311) at 150 K in ultra-high vacuum. The reverse reaction of carbon monoxide and surface oxygen to form carbon dioxide is also shown to occur in the range of 150 to 400 K. At about 0.4 ML oxygen on Cu(311), a poorly ordered p(2 x 1) surface structure forms. Increasing the oxygen coverage further enhances surface disorder. Oxygen blocks only one of the three CO adsorption sites, and has little effect on CO2 adsorption and dissociation. Adsorption of D2 on Cu(311) is enhanced by pre-adsorbed oxygen. We contrast the high reactivity of Cu(311) for CO2 and D2 dissociative adsorption, and for CO oxidation to CO2 with the relatively inactive Cu(110). These chemisorption studies suggest that methanol synthesis over copper may be a structure sensitive reaction. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. NR 21 TC 63 Z9 65 U1 4 U2 22 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD FEB 1 PY 1992 VL 262 IS 1-2 BP 68 EP 76 DI 10.1016/0039-6028(92)90460-N PG 9 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA HE056 UT WOS:A1992HE05600018 ER PT J AU BIEGON, A DILLON, K VOLKOW, ND HITZEMANN, RJ FOWLER, JS WOLF, AP AF BIEGON, A DILLON, K VOLKOW, ND HITZEMANN, RJ FOWLER, JS WOLF, AP TI QUANTITATIVE AUTORADIOGRAPHY OF COCAINE BINDING-SITES IN HUMAN BRAIN POSTMORTEM SO SYNAPSE LA English DT Article DE DOPAMINE UPTAKE SITES; SEROTONIN UPTAKE SITES; ANTIDEPRESSANT DRUGS ID DOPAMINE UPTAKE SITES; RAT-BRAIN; CEREBRAL-CORTEX; RECEPTORS; NOREPINEPHRINE; LOCALIZATION; INHIBITORS; MEMBRANES; STRIATUM; PUTAMEN AB Quantitative autoradiography was used to study cocaine binding sites in the human brain postmortem. Tritiated cocaine was applied to brain sections from three drug- and disease-free subjects at a low (10 nM) concentration and at a high (1-mu-M) concentration, the latter being in the range of brain concentrations of cocaine found in users of the drug. Nonspecific binding was assessed in the presence of 100-mu-M unlabeled cocaine. At low (10 nM) concentration's of labeled cocaine, the basal ganglia exhibit the highest density of binding sites, with considerably lower densities in thalamus, cortex, and hippocampus. Cocaine binding at high (1-mu-M) concentrations displayed a different distribution pattern, more homogeneous with some cortical regions exhibiting binding site densities close to those seen in the basal ganglia. Preliminary competition experiments with several drugs indicate that dopamine uptake inhibitors completely block cocaine binding to the basal ganglia, while serotonin uptake inhibitors were more effective in the hippocampus. These findings suggest that cocaine binds to dopamine uptake sites in the human basal ganglia postmortem but that it also interacts with other classes of binding sites, depending on the concentration and brain region examined. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. SUNY STONY BROOK,DEPT PSYCHIAT,STONY BROOK,NY 11794. RP BIEGON, A (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 30 TC 24 Z9 24 U1 2 U2 2 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0887-4476 J9 SYNAPSE JI Synapse PD FEB PY 1992 VL 10 IS 2 BP 126 EP 130 DI 10.1002/syn.890100207 PG 5 WC Neurosciences SC Neurosciences & Neurology GA HB463 UT WOS:A1992HB46300006 PM 1585256 ER PT J AU WELCH, WJ BUCK, RJ SACKS, J WYNN, HP MITCHELL, TJ MORRIS, MD AF WELCH, WJ BUCK, RJ SACKS, J WYNN, HP MITCHELL, TJ MORRIS, MD TI SCREENING, PREDICTING, AND COMPUTER EXPERIMENTS SO TECHNOMETRICS LA English DT Article DE COMPUTER CODE; DATA-ADAPTIVE MODELING; DIMENSION REDUCTION; ELECTRONIC-CIRCUIT SIMULATION; MAXIMUM LIKELIHOOD; SIMULATION; STOCHASTIC PROCESS AB Many scientific phenomena are now investigated by complex computer models or codes. Given the input values, the code produces one or more outputs via a complex mathematical model. Often the code is expensive to run, and it may be necessary to build a computationally cheaper predictor to enable, for example, optimization of the inputs. If there are many input factors, an initial step in building a predictor is identifying (screening) the active factors. We model the output of the computer code as the realization of a stochastic process. This model has a number of advantages. First, it provides a statistical basis, via the likelihood, for a stepwise algorithm to determine the important factors. Second, it is very flexible, allowing nonlinear and interaction effects to emerge without explicitly modeling such effects. Third, the same data are used for screening and building the predictor, so expensive runs are efficiently used. We illustrate the methodology with two examples, both having 20 input variables. In these examples, we identify the important variables, detect curvature and interactions, and produce a useful predictor with 30-50 runs of the computer code. C1 CITY UNIV LONDON,SCH MATH ACTUARIAL SCI & STAT,LONDON EC1V 0HB,ENGLAND. NATL INST STAT SCI,RES TRIANGLE PK,NC 27709. OAK RIDGE NATL LAB,DIV ENGN PHYS & MATH,OAK RIDGE,TN 37831. UNIV ILLINOIS,DEPT CIVIL ENGN,CHAMPAIGN,IL 61820. RP WELCH, WJ (reprint author), UNIV WATERLOO,DEPT STAT & ACTUARIAL SCI,WATERLOO N2L 3G1,ONTARIO,CANADA. OI Wynn, Henry/0000-0002-6448-1080 NR 15 TC 295 Z9 307 U1 5 U2 12 PU AMER STATISTICAL ASSOC PI ALEXANDRIA PA 1429 DUKE ST, ALEXANDRIA, VA 22314 SN 0040-1706 J9 TECHNOMETRICS JI Technometrics PD FEB PY 1992 VL 34 IS 1 BP 15 EP 25 DI 10.2307/1269548 PG 11 WC Statistics & Probability SC Mathematics GA GZ777 UT WOS:A1992GZ77700002 ER PT J AU CROWDER, SV AF CROWDER, SV TI AN SPC MODEL FOR SHORT PRODUCTION-RUNS - MINIMIZING EXPECTED COST SO TECHNOMETRICS LA English DT Article DE DYNAMIC PROGRAMMING; ECONOMIC DESIGN; FINITE HORIZON; STEADY MODEL ID CHARTS AB In some manufacturing situations, the assumption of a long production run may not be appropriate. For example, job shops typically will not have the benefit of large production runs. Much of the literature on the economic design of control charts, however, assumes an effectively infinite production run. A finite-horizon or short-production-run version of an economic-process-control model of Bather and Box and Jenkins is considered here. An algorithm is derived that allows implementation of this model and adjustment strategy for the short-production-run case. The solution to the control problem is consistent with traditional statistical process control philosophy in that process adjustment is called for only when the process mean is substantially off target. The control or adjustment limits for this model are time-varying and depend on the break-even points between quadratic cost for being off target and fixed adjustment cost. It is shown that the length of the production run can greatly influence the control or adjustment strategy. Use of control limits based on the assumption of an infinite-run process can significantly increase total expected cost. RP CROWDER, SV (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 12 TC 44 Z9 47 U1 0 U2 3 PU AMER STATISTICAL ASSOC PI ALEXANDRIA PA 1429 DUKE ST, ALEXANDRIA, VA 22314 SN 0040-1706 J9 TECHNOMETRICS JI Technometrics PD FEB PY 1992 VL 34 IS 1 BP 64 EP 73 DI 10.2307/1269553 PG 10 WC Statistics & Probability SC Mathematics GA GZ777 UT WOS:A1992GZ77700007 ER PT J AU SCHIPPER, L STEINER, R DUERR, P AN, F STROM, S AF SCHIPPER, L STEINER, R DUERR, P AN, F STROM, S TI ENERGY USE IN PASSENGER TRANSPORT IN OECD COUNTRIES - CHANGES SINCE 1970 SO TRANSPORTATION LA English DT Article DE ENERGY INTENSITY; MODEL SHARE; PASSENGER TRANSPORTATION; TRANSPORT IN OECD COUNTRIES AB This paper analyzes some of the changes that took place in the structure of energy use for passenger travel in industrialized countries. Data is presented on energy use and travel activity for the four major modes of travel - automobile, bus, rail and air - for eight OECD countries: the United States, Japan, the United Kingdom, West Germany, France, Italy, Sweden, and Norway. We use the Laspeyres and Divisia indices to analyze the causes of the change in energy use between 1970 and 1987. The total change in energy use for travel is explained by changes in domestic passenger transport volumes, the mix of modes of travel, and the energy intensities of each mode. We have found two important effects that have a fundamental impact on energy use for travel since 1970. First, shifts among modes of transport towards more energy-intensive ones and large increases in volumes of travel (measured in passenger-kilometers) increased energy use for travel in many OECD countries, often more rapidly than the overall growth in GDP. Second, energy intensities, measured in mJ/passenger-kilometer, of passenger transport fell only in a few countries between 1970 and 1987. Even though individual automobiles have become more energy-efficient, greater size, power, and weight, worsening traffic conditions in Japan and Europe, and fewer people in cars restrained or even offset efficiency improvements. Particularly notable are the increases in intensities in Japan and Germany. The most important exception to this trend was the United States, but the intensities of land-based travel remain higher there than in most other countries. These findings lead to a pessimistic outlook for future energy use for travel. After all, if little or no energy was saved during the decades of high fuel prices, what can be expected in the 1990s? C1 UNIV OSLO,HELSINKI,FINLAND. MIT,CAMBRIDGE,MA 02139. RP SCHIPPER, L (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 7 TC 28 Z9 28 U1 1 U2 4 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0049-4488 J9 TRANSPORTATION JI Transportation PD FEB PY 1992 VL 19 IS 1 BP 25 EP 42 DI 10.1007/BF01130772 PG 18 WC Engineering, Civil; Transportation; Transportation Science & Technology SC Engineering; Transportation GA HX427 UT WOS:A1992HX42700002 ER PT J AU JANSON, BN SOUTHWORTH, F AF JANSON, BN SOUTHWORTH, F TI ESTIMATING DEPARTURE TIMES FROM TRAFFIC COUNTS USING DYNAMIC ASSIGNMENT SO TRANSPORTATION RESEARCH PART B-METHODOLOGICAL LA English DT Article ID CHOICE; MODEL AB Dynamic traffic assignment and observed traffic counts are used to estimate the distribution of departure times in an urban area trip matrix. The objective is to find the maximum entropy distribution of departure times by origin zone subject to observed traffic counts on a subset of network links. The procedure results in the estimated number of trip departures from each origin in 10-15 minute time intervals of the full analysis period. Such an analysis period will typically range from one to three hours long. We first review the dynamic user-equilibrium assignment problem (DUE) and the dynamic traffic assignment algorithm (DTA) from a previous paper, and then describe its use with traffic counts to estimate departure times in a trip matrix. We present an application to a Pittsburgh network in which trip departures are estimated for each 10 minute interval of a peak-hour survey trip matrix. Dynamic assignment and departure time estimation based on traffic counts can be used to examine the impacts of alternative transportation management strategies such as work hour changes and ramp metering. Computational advances such as parallel computing will enable the procedure to be run on large networks while counts are being monitored. Such an application may provide near real-time detection of temporal trip departure profiles by origin zone in emergency evacuations or other special events. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 24 TC 12 Z9 12 U1 1 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0191-2615 J9 TRANSPORT RES B-METH JI Transp. Res. Pt. B-Methodol. PD FEB PY 1992 VL 26 IS 1 BP 3 EP 16 DI 10.1016/0191-2615(92)90016-P PG 14 WC Economics; Engineering, Civil; Operations Research & Management Science; Transportation; Transportation Science & Technology SC Business & Economics; Engineering; Operations Research & Management Science; Transportation GA HG873 UT WOS:A1992HG87300002 ER PT J AU SMITHWACKERLE, VL TRYBUS, CL AF SMITHWACKERLE, VL TRYBUS, CL TI NEW LIFE FOR UNUSABLE ELECTROPOLISHED TEM FOILS SO ULTRAMICROSCOPY LA English DT Letter AB In this Letter we describe modifications to the Klepeis method of preparing TEM foils which utilizes previously electropolished specimens having unsuitable thin areas. The technique described employs a mechanical polishing sequence of diamond films with a final polish using colloidal silica. Foils are polished flat on one side, then flipped and polished until an edge is visibly receding. Samples may need only brief ion-milling before viewing, thus artifacts are minimal. This technique is ideal when faced with limited material, and it is also much quicker than the Klepeis method [S.J. Klepeis, J.P. Benedict and R.M. Anderson, in: Mater. Res. Soc. Symp. Proc. 115 (1988) 1791. C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. NR 1 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-3991 J9 ULTRAMICROSCOPY JI Ultramicroscopy PD FEB PY 1992 VL 40 IS 2 BP 187 EP 190 DI 10.1016/0304-3991(92)90060-W PG 4 WC Microscopy SC Microscopy GA HN134 UT WOS:A1992HN13400009 ER PT J AU SHORTLE, WC BONDIETTI, EA AF SHORTLE, WC BONDIETTI, EA TI TIMING, MAGNITUDE, AND IMPACT OF ACIDIC DEPOSITION ON SENSITIVE FOREST SITES SO WATER AIR AND SOIL POLLUTION LA English DT Article ID EASTERN-UNITED-STATES; RED SPRUCE; CALCIUM; SOILS; PRECIPITATION; VEGETATION; WATERSHEDS; CHEMISTRY AB Adverse effects of acidic deposition on forest health are most likely to occur in forests which develop a thick raw or "mor" humus layer in which the effective cation exchange capacity is highly sensitive to acid input. A study of the trend of exchangeable Ca and Mg ions in sensitive humus layers over the past six decades indicated that a downward shift in equilibrium has occurred that is consistent with theories of ion mobilization and coincident in time with increasing acidic deposition in the mid-1900's. Independent records of a base cation mobilization in wood supports the view of a change in the root zone in sensitive forest sites and in lake water chemistry. Induced nutrient deficiency in declining forest stands was indicated by a high Al:Ca ratio in fine root tip tissue as a marker of altered uptake efficiency which leads to increased vulnerability to biotic factors and greater sensitivity to abiotic stresses. Evidence indicates that sensitive sites were damaged by acidic deposition 20 to 40 yr ago, long before the problem of "acid rain" was recognized. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. RP SHORTLE, WC (reprint author), US FOREST SERV,NE FOREST EXPT STN,POB 640,DURHAM,NH 03824, USA. NR 55 TC 53 Z9 53 U1 0 U2 2 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0049-6979 J9 WATER AIR SOIL POLL JI Water Air Soil Pollut. PD FEB PY 1992 VL 61 IS 3-4 BP 253 EP 267 DI 10.1007/BF00482609 PG 15 WC Environmental Sciences; Meteorology & Atmospheric Sciences; Water Resources SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences; Water Resources GA HC634 UT WOS:A1992HC63400006 ER PT J AU FALTA, RW PRUESS, K JAVANDEL, I WITHERSPOON, PA AF FALTA, RW PRUESS, K JAVANDEL, I WITHERSPOON, PA TI NUMERICAL MODELING OF STEAM INJECTION FOR THE REMOVAL OF NONAQUEOUS PHASE LIQUIDS FROM THE SUBSURFACE .1. NUMERICAL FORMULATION SO WATER RESOURCES RESEARCH LA English DT Article ID COMPOSITIONAL MULTIPHASE MODEL; ADVECTIVE-DISPERSIVE TRANSPORT; POROUS-MEDIA CONTAMINATION; DENSE ORGANIC VAPORS; UNSATURATED ZONE; GROUNDWATER CONTAMINATION; PETROLEUM-PRODUCTS; IMMISCIBLE FLUIDS; FLOW; SIMULATION AB A multidimensional integral finite difference numerical simulator is developed for modeling the steam displacement of nonaqueous phase liquid (NAPL) contaminants in shallow subsurface systems. This code, named STMVOC, considers three flowing phases, gas, aqueous, and NAPL; and three mass components, air, water, and an organic chemical. Interphase mass transfer of the components between any of the phases is calculated by assuming local chemical equilibrium between the phases, and adsorption of the chemical to the soil is included. Heat transfer occurs due to conduction and multiphase convection and includes latent heat effects. A general equation of state is implemented in the code for calculating the thermophysical properties of the NAPL/chemical. This equation of state is primarily based on corresponding states methods of property estimation using a chemical's critical constants. The necessary constants are readily available for several hundred hazardous organic liquid chemicals. In part 2 (Falta et al., this issue), the code is used to simulate two one-dimensional laboratory steam injection experiments and to examine the effect of NAPL properties on the steam displacement process. RP UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV EARTH SCI, 1 CYCLOTRON RD, BERKELEY, CA 94720 USA. NR 82 TC 102 Z9 102 U1 1 U2 13 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0043-1397 EI 1944-7973 J9 WATER RESOUR RES JI Water Resour. Res. PD FEB PY 1992 VL 28 IS 2 BP 433 EP 449 DI 10.1029/91WR02526 PG 17 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA HC352 UT WOS:A1992HC35200011 ER PT J AU FALTA, RW PRUESS, K JAVANDEL, I WITHERSPOON, PA AF FALTA, RW PRUESS, K JAVANDEL, I WITHERSPOON, PA TI NUMERICAL MODELING OF STEAM INJECTION FOR THE REMOVAL OF NONAQUEOUS PHASE LIQUIDS FROM THE SUBSURFACE .2. CODE VALIDATION AND APPLICATION SO WATER RESOURCES RESEARCH LA English DT Article ID TRANSPORT; CLEANUP AB The multiphase steam injection simulator developed in part 1 (Falta et al., this issue) is used to simulate two laboratory column steam displacement experiments. In the first simulation, steam is injected into a clean, water-saturated column, while in the second simulation, steam is injected into a column containing both water and separate phase trichloroethylene. In both cases, the numerical results are in good quantitative agreement with the experimental data. Based on the assumption of local chemical equilibrium between the phases, a simple criterion is derived for determining the major mechanism of nonaqueous phase liquid (NAPL)/chemical transport during the steam displacement process. Several one-dimensional simulations of the steam displacement of high-boiling-point NAPLs are discussed. These results are consistent with theoretical predictions and indicate that steam may efficiently displace organic liquids having boiling points substantially greater than that of water. RP FALTA, RW (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV EARTH SCI,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 15 TC 64 Z9 64 U1 0 U2 4 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD FEB PY 1992 VL 28 IS 2 BP 451 EP 465 DI 10.1029/91WR02527 PG 15 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA HC352 UT WOS:A1992HC35200012 ER PT J AU GINN, TR CUSHMAN, JH AF GINN, TR CUSHMAN, JH TI A CONTINUOUS-TIME INVERSE OPERATOR FOR GROUNDWATER AND CONTAMINANT TRANSPORT MODELING - MODEL IDENTIFIABILITY SO WATER RESOURCES RESEARCH LA English DT Article ID STATISTICAL APPROACH; AQUIFER HYDROLOGY; FLOW; PARAMETERS; ALGORITHMS AB General identifiability conditions are derived for the model coefficients of the spatially discretized continuous-time diffusion equation. These conditions in turn determine some sufficient and necessary conditions for the existence and uniqueness of the continuous-time inverse operator described in a previous article. The identifiability conditions are in terms of the initial conditions and the flux vector containing boundary condition information and the eigenspace of the spatially discretized system. The derivation of these conditions gives some insight into the location of the solution of the inverse problem in terms of the direct operator under investigation in the space of the Laplace transform and limited insight into the stability of the solution near that location. C1 PURDUE UNIV, W LAFAYETTE, IN 47907 USA. RP GINN, TR (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 34 TC 17 Z9 17 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD FEB PY 1992 VL 28 IS 2 BP 539 EP 549 DI 10.1029/91WR02645 PG 11 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA HC352 UT WOS:A1992HC35200019 ER PT J AU NOORISHAD, J TSANG, CF PERROCHET, P MUSY, A AF NOORISHAD, J TSANG, CF PERROCHET, P MUSY, A TI A PERSPECTIVE ON THE NUMERICAL-SOLUTION OF CONVECTION-DOMINATED TRANSPORT PROBLEMS - A PRICE TO PAY FOR THE EASY WAY OUT SO WATER RESOURCES RESEARCH LA English DT Article ID FINITE-ELEMENT SCHEME; EQUATION AB In a brief but fundamental review of the evolution of the conventional numerical techniques used in the solution of convection-dominated transport problems, we explore the difficulties that have been remedied to various degrees by various workers. In the course of this review we obtain the performance characteristic of the Crank-Nicolson Galerkin finite element method in the form of a curve in Peclet number and Courant number space. We show that the performance can be altered through a new upwind parameter that can easily be incorporated into many of the existing numerical solution methods. By providing an insight into the limitations of some of these methods we demonstrate, by means of numerical experiments, that the proposed upwinding procedure ensures acceptable solutions throughout the Pe-Cr space at a reasonable cost of the smearing effect. C1 ECOLE POLYTECH FED LAUSANNE,INST GER RURAL,CH-1015 LAUSANNE,SWITZERLAND. RP NOORISHAD, J (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV EARTH SCI,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. RI Perrochet, Pierre/J-1464-2014 NR 14 TC 31 Z9 32 U1 0 U2 3 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD FEB PY 1992 VL 28 IS 2 BP 551 EP 561 DI 10.1029/91WR02730 PG 11 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA HC352 UT WOS:A1992HC35200020 ER PT J AU FRANCOFERREIRA, EA KANNE, WR AF FRANCOFERREIRA, EA KANNE, WR TI REMOTE REACTOR REPAIR - AVOIDANCE OF HELIUM-INDUCED CRACKING USING GMA WELDING SO WELDING JOURNAL LA English DT Article RP FRANCOFERREIRA, EA (reprint author), WESTINGHOUSE SAVANNAH RIVER CO,SAVANNAH RIVER LAB,AIKEN,SC, USA. NR 7 TC 9 Z9 9 U1 1 U2 1 PU AMER WELDING SOC PI MIAMI PA PO BOX 351040, MIAMI, FL 33135 SN 0043-2296 J9 WELD J JI Weld. J. PD FEB PY 1992 VL 71 IS 2 BP 43 EP 51 PG 9 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA HD300 UT WOS:A1992HD30000005 ER PT J AU TRETTIN, L AF TRETTIN, L TI CRADLE TO GRAVE - LIFE, WORK, AND DEATH AT THE LAKE-SUPERIOR COPPER MINES - LANKTON,L SO WESTERN HISTORICAL QUARTERLY LA English DT Book Review RP TRETTIN, L (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37830, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU WESTERN HISTORY ASSOCIATION PI LOGAN PA UTAH STATE UNIV, UMC 0740, LOGAN, UT 84322 SN 0043-3810 J9 WESTERN HIST QUART JI West. Hist. Q. PD FEB PY 1992 VL 23 IS 1 BP 110 EP 111 DI 10.2307/970282 PG 2 WC History SC History GA HJ576 UT WOS:A1992HJ57600037 ER PT J AU SINGH, B TAYLOR, HW BROWNE, E HALL, HL NORMAN, EB LARIMER, RM MACCHIAVELLI, AO LESKO, KT SUR, B AF SINGH, B TAYLOR, HW BROWNE, E HALL, HL NORMAN, EB LARIMER, RM MACCHIAVELLI, AO LESKO, KT SUR, B TI STUDY OF GAMMA-RADIATION FROM PD-100 DECAY SO ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI LA English DT Article ID CYCLOTRON PRODUCTION; TRANSITIONS; RH-101M; NUCLEI AB This paper presents a study of the gamma-rays from the electron capture decay of 3.63 d 100Pd. Singles and coincidence measurements provided an accurate determination of gamma-ray intensities and an improved knowledge of the Rh-100 level scheme. Experimental evidence supports excitation of levels in Rh-100 at 86-, 136- and 154 keV, not previously reported from the decay of 100Pd. C1 UNIV TORONTO,DEPT PHYS,TORONTO M5S 1A1,ONTARIO,CANADA. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DIV NUCL CHEM,LIVERMORE,CA 94551. RP SINGH, B (reprint author), MCMASTER UNIV,TANDEM ACCELERATOR LAB,HAMILTON L8S 4K1,ONTARIO,CANADA. OI Hall, Howard/0000-0002-4080-5159 NR 22 TC 1 Z9 1 U1 1 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0939-7922 J9 Z PHYS A-HADRON NUCL JI Z. Phys. A.-Hadrons Nuclei PD FEB PY 1992 VL 341 IS 3 BP 249 EP 253 DI 10.1007/BF01283532 PG 5 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA HE248 UT WOS:A1992HE24800001 ER PT J AU AMATO, A GEIBEL, C GYGAX, FN HEFFNER, RH KNETSCH, E MACLAUGHLIN, DE SCHANK, C SCHENCK, A STEGLICH, F WEBER, M AF AMATO, A GEIBEL, C GYGAX, FN HEFFNER, RH KNETSCH, E MACLAUGHLIN, DE SCHANK, C SCHENCK, A STEGLICH, F WEBER, M TI MU+SR STUDIES OF UM2AL3, M = NI, PD SO ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER LA English DT Editorial Material AB Positive-muon spin rotation (mu+SR) measurements have been carried out in the new heavy-fermion superconductors UM2Al3, M = Ni and Pd. In UNi2Al3 the observed mu+ frequencies in zero applied field indicate commensurate antiferromagnetic (AF) ordering of U moments approximately 0.1-mu(B)/U atom. These moments coexist with superconductivity and have the highest values observed in an AF heavy-fermion superconductor. The absence of well-defined frequencies in zero-field mu+SR in the AF state of UPd2Al3 suggests symmetric mu+ stopping sites. In this system mu+SR linewidths below T(c) yield a preliminary value of approximately 8000 angstrom for the London penetration depth. C1 TH DARMSTADT, INST FESTKORPERPHYS, W-6100 DARMSTADT, GERMANY. UNIV CALIF LOS ALAMOS SCI LAB, LOS ALAMOS, NM 87545 USA. LEIDEN UNIV, KAMERLINGH ONNES LAB, 2300 RA LEIDEN, NETHERLANDS. UNIV CALIF RIVERSIDE, DEPT PHYS, RIVERSIDE, CA 92521 USA. RP AMATO, A (reprint author), ETH ZURICH, INST MITTELENERGIEPHYS, CH-5232 VILLIGEN, SWITZERLAND. RI Amato, Alex/H-7674-2013 OI Amato, Alex/0000-0001-9963-7498 NR 5 TC 34 Z9 34 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0722-3277 J9 Z PHYS B CON MAT JI Z. Phys. B-Condens. Mat. PD FEB PY 1992 VL 86 IS 2 BP 159 EP 160 DI 10.1007/BF01313820 PG 2 WC Physics, Condensed Matter SC Physics GA HD310 UT WOS:A1992HD31000001 ER PT J AU BUSSMANNHOLDER, A BISHOP, AR AF BUSSMANNHOLDER, A BISHOP, AR TI HIGH-TEMPERATURE SUPERCONDUCTIVITY - THE ROLES OF SOFT-PHONON DRIVEN STRUCTURAL PHASE-TRANSITIONS AND BIPHONON-ELECTRON COUPLING SO ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER LA English DT Article ID POLARIZABILITY MODEL; FERROELECTRICITY; MECHANISM AB For the first time, fully self-consistent soft phonon data, associated with the tetragonal-orthorhombic structural transition in the high-temperature superconductor La2-xSrxCuO4, are used to solve Eliashberg equations. It is found that the electron-phonon coupling constant is strongly x- and temperature-dependent. The superconducting transition temperature T(c) follows the experimental x-dependence but does not exceed 28 K. The higher T(c) values observed are attributed to nonlinear electron-phonon interactions, due to high oxygen ion polarizability, which produce biphonon resonances and bound states and significantly increase T(c). C1 UNIV BAYREUTH, W-8580 BAYREUTH, GERMANY. UNIV CALIF LOS ALAMOS SCI LAB, DIV THEORET, ADV STUDIES PROGRAM HIGH TEMP SUPERCONDUCT, LOS ALAMOS, NM 87545 USA. RP BUSSMANNHOLDER, A (reprint author), MAX PLANCK INST FESTKORPERFORSCH, HEISENBERGSTR 1, W-7000 STUTTGART 80, GERMANY. NR 28 TC 9 Z9 9 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0722-3277 J9 Z PHYS B CON MAT JI Z. Phys. B-Condens. Mat. PD FEB PY 1992 VL 86 IS 2 BP 183 EP 186 DI 10.1007/BF01313824 PG 4 WC Physics, Condensed Matter SC Physics GA HD310 UT WOS:A1992HD31000005 ER PT J AU AKESSON, T ALMEHED, S ANGELIS, ALS ARMENISE, N ATHERTON, H AUBRY, P BARTELS, HW BEAUDOIN, G BEAULIEU, JM BEKER, H BENARY, O BETTONI, D BISI, V BLEVIS, I BOGGILD, H CLELAND, W CLEMEN, M COLLICK, B CORRIVEAU, F DAGAN, S DEDERICHS, K DELLUOMO, S DEPOMMIER, P DEVENISH, RCE DILIBERTO, S DIGIACOMO, N DODD, JR DOLGOSHEIN, B DREES, A ENYO, H ERLANDSSON, B ESTEN, MJ FABJAN, CW FISCHER, P FRAENKEL, Z GAIDOT, A GIBRATDEBU, F GUIBELLINO, P GLASSEL, P GOERLACH, U HAGLUND, R HAMEL, LA VANHECKE, H HEDBERG, V HEIFETZ, R HOLSCHER, A JACAK, B JARLSKOG, G JOHANSSON, S KRANER, H KROH, V LAMARCHE, F LEROY, C LISSAUER, D LONDON, G LORSTAD, B LOUNIS, A MARTELLI, F MASERA, M MARZARICHIESA, A MAZZONI, MA MAZZUCATO, E MCCUBBIN, ML MCCUBBIN, NA MCGAUGHEY, P MEDDI, F MJORNMARK, U MUCIACCIA, MT MURAVIEV, S MURRAY, M NEUBERT, M NILSSON, S OLSEN, L OREN, Y PANSART, JP PARK, YM PFEIFFER, A PIUZ, F POLYCHRONAKOS, V POULARD, G PRICE, M RAHM, D RAMELLO, L RICCATI, L ROMANO, G ROSA, G SANDOR, L SCHUKRAFT, J SEKIMOTO, M SELLDEN, B SEMAN, M SHMELEVA, A SIDOROV, V SIMONE, S SIROIS, Y SLETTEN, H SMIRNOV, S SOLTANI, J SONDHEIM, W SPECHT, HJ STERN, E STUMER, I SUNIER, J TCHERNIATIN, V THODBERG, HH THOMPSON, J TIKHOMIROV, V TSERRUYA, I VASSEUR, G VEENHOF, R WIGMANS, R YEPES, P AF AKESSON, T ALMEHED, S ANGELIS, ALS ARMENISE, N ATHERTON, H AUBRY, P BARTELS, HW BEAUDOIN, G BEAULIEU, JM BEKER, H BENARY, O BETTONI, D BISI, V BLEVIS, I BOGGILD, H CLELAND, W CLEMEN, M COLLICK, B CORRIVEAU, F DAGAN, S DEDERICHS, K DELLUOMO, S DEPOMMIER, P DEVENISH, RCE DILIBERTO, S DIGIACOMO, N DODD, JR DOLGOSHEIN, B DREES, A ENYO, H ERLANDSSON, B ESTEN, MJ FABJAN, CW FISCHER, P FRAENKEL, Z GAIDOT, A GIBRATDEBU, F GUIBELLINO, P GLASSEL, P GOERLACH, U HAGLUND, R HAMEL, LA VANHECKE, H HEDBERG, V HEIFETZ, R HOLSCHER, A JACAK, B JARLSKOG, G JOHANSSON, S KRANER, H KROH, V LAMARCHE, F LEROY, C LISSAUER, D LONDON, G LORSTAD, B LOUNIS, A MARTELLI, F MASERA, M MARZARICHIESA, A MAZZONI, MA MAZZUCATO, E MCCUBBIN, ML MCCUBBIN, NA MCGAUGHEY, P MEDDI, F MJORNMARK, U MUCIACCIA, MT MURAVIEV, S MURRAY, M NEUBERT, M NILSSON, S OLSEN, L OREN, Y PANSART, JP PARK, YM PFEIFFER, A PIUZ, F POLYCHRONAKOS, V POULARD, G PRICE, M RAHM, D RAMELLO, L RICCATI, L ROMANO, G ROSA, G SANDOR, L SCHUKRAFT, J SEKIMOTO, M SELLDEN, B SEMAN, M SHMELEVA, A SIDOROV, V SIMONE, S SIROIS, Y SLETTEN, H SMIRNOV, S SOLTANI, J SONDHEIM, W SPECHT, HJ STERN, E STUMER, I SUNIER, J TCHERNIATIN, V THODBERG, HH THOMPSON, J TIKHOMIROV, V TSERRUYA, I VASSEUR, G VEENHOF, R WIGMANS, R YEPES, P TI PROTON DISTRIBUTIONS IN THE TARGET FRAGMENTATION REGION IN PROTON-NUCLEUS AND NUCLEUS-NUCLEUS COLLISIONS AT HIGH-ENERGIES SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID HADRON-NUCLEUS; PARTON MODEL; 200-A GEV; TRANSVERSE; SPECTRA; CERN; BARYON AB We present measurements of the rapidity and transverse-momentum distributions of the protons emitted in S + W, O + W, and p + W reactions at 200 GeV/A around the target rapidity (y = 1). The rapidity density rises linearly with the transverse energy for all three systems, but the slope for p + W is much steeper than for O + W and S + W. The rapidity density for p + W is much higher than predicted by summing single nucleon-nucleon collisions without any nuclear effects, indicating substantial rescattering of the produced particles. The predictions of the VENUS 3 model, including rescattering, show reasonable agreement with the data for all three systems. We do not have evidence for a strong collective flow of the outgoing particles. C1 UNIV BARI,I-70124 BARI,ITALY. IST NAZL FIS NUCL,BARI,ITALY. UNIV LUND,S-22101 LUND,SWEDEN. BROOKHAVEN NATL LAB,UPTON,NY 11973. UNIV HEIDELBERG,W-6900 HEIDELBERG,GERMANY. MCGILL UNIV,MONTREAL H3A 2T5,QUEBEC,CANADA. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87544. UNIV MONTREAL,MONTREAL H3C 3J7,QUEBEC,CANADA. PN LEBEDEV PHYS INST,MOSCOW,USSR. PHYS ENGN INST,MOSCOW,USSR. NUCL PHYS INST,NOVOSIBIRSK,USSR. UNIV PITTSBURGH,PITTSBURGH,PA 15260. UNIV ROME,I-00100 ROME,ITALY. IST NAZL FIS NUCL,ROME,ITALY. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. CENS,F-91190 GIF SUR YVETTE,FRANCE. UNIV STOCKHOLM,S-10691 STOCKHOLM,SWEDEN. TEL AVIV UNIV,IL-69978 TEL AVIV,ISRAEL. UNIV SALERNO,I-84100 SALERNO,ITALY. WEIZMANN INST SCI,IL-76100 REHOVOT,ISRAEL. UNIV TURIN,I-10124 TURIN,ITALY. IST NAZL FIS NUCL,TURIN,ITALY. UNIV LONDON UNIV COLL,LONDON WC1E 6BT,ENGLAND. IST NAZL FIS NUCL,SALERNO,ITALY. RP AKESSON, T (reprint author), CERN,CH-1211 GENEVA 23,SWITZERLAND. RI Smirnov, Sergei/F-1014-2011; Masera, Massimo/J-4313-2012; Ramello, Luciano/F-9357-2013; Tikhomirov, Vladimir/M-6194-2015; Shmeleva, Alevtina/M-6199-2015; Martelli, Filippo/P-4041-2015; OI Smirnov, Sergei/0000-0002-6778-073X; Tikhomirov, Vladimir/0000-0002-9634-0581; Martelli, Filippo/0000-0003-3761-8616; Simone, Saverio/0000-0003-3631-8398; Masera, Massimo/0000-0003-1880-5467 NR 22 TC 7 Z9 7 U1 0 U2 2 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD FEB PY 1992 VL 53 IS 2 BP 183 EP 191 PG 9 WC Physics, Particles & Fields SC Physics GA HC888 UT WOS:A1992HC88800001 ER PT J AU KOBEL, M ANTREASYAN, D BARTELS, HW BESSET, D BIELER, C BIENLEIN, JK BIZETTI, A BLOOM, ED BROCK, I BROCKMULLER, K CABENDA, R CARTACCI, A CAVALLISFORZA, M CLARE, R COMPAGNUCCI, A CONFORTO, G COOPER, S COWAN, R COYNE, D ENGLER, A FAIRFIELD, K FOLGER, G FRIDMAN, A GAISER, J GELPHMAN, D GLASER, G GODFREY, G GRAAF, K HEIMLICH, FH HEINSIUS, FH HOFSTADTER, R IRION, J JAKUBOWSKI, Z JANSSEN, H KARCH, K KEH, S KIEL, T KILIAN, H KIRKBRIDE, I KLOIBER, T KOCH, W KONIG, AC KONIGSMANN, K KRAEMER, RW KRUGER, S LANDI, G LEE, R LEFFLER, S LEKEBUSCH, R LESIAK, T LITKE, AM LOCKMAN, W LOWE, S LURZ, B MARLOW, D MARSISKE, H MASCHMANN, W MCBRIDE, P MESSING, F METZGER, WJ MEYER, H MONTELEONI, B MURYN, B NERNST, R NICZYPORUK, B NOWAK, G PECK, C PELFER, PG POLLOCK, B PORTER, FC PRINDLE, D RATOFF, P REIDENBACH, M RENGER, B RIPPICH, C SCHEER, M SCHMITT, P SCHOTANUS, J SCHUTTE, J SCHWARZ, A SIEVERS, D SKWARNICKI, T STOCK, V STRAUCH, K STROHBUSCH, U TOMPKINS, J TROST, HJ VANUITERT, B VANDEWALLE, RT VOGEL, H VOIGT, A VOLLAND, U WACHS, K WACKER, K WALK, W WEGENER, H WILLIAMS, DA ZSCHORSCH, P AF KOBEL, M ANTREASYAN, D BARTELS, HW BESSET, D BIELER, C BIENLEIN, JK BIZETTI, A BLOOM, ED BROCK, I BROCKMULLER, K CABENDA, R CARTACCI, A CAVALLISFORZA, M CLARE, R COMPAGNUCCI, A CONFORTO, G COOPER, S COWAN, R COYNE, D ENGLER, A FAIRFIELD, K FOLGER, G FRIDMAN, A GAISER, J GELPHMAN, D GLASER, G GODFREY, G GRAAF, K HEIMLICH, FH HEINSIUS, FH HOFSTADTER, R IRION, J JAKUBOWSKI, Z JANSSEN, H KARCH, K KEH, S KIEL, T KILIAN, H KIRKBRIDE, I KLOIBER, T KOCH, W KONIG, AC KONIGSMANN, K KRAEMER, RW KRUGER, S LANDI, G LEE, R LEFFLER, S LEKEBUSCH, R LESIAK, T LITKE, AM LOCKMAN, W LOWE, S LURZ, B MARLOW, D MARSISKE, H MASCHMANN, W MCBRIDE, P MESSING, F METZGER, WJ MEYER, H MONTELEONI, B MURYN, B NERNST, R NICZYPORUK, B NOWAK, G PECK, C PELFER, PG POLLOCK, B PORTER, FC PRINDLE, D RATOFF, P REIDENBACH, M RENGER, B RIPPICH, C SCHEER, M SCHMITT, P SCHOTANUS, J SCHUTTE, J SCHWARZ, A SIEVERS, D SKWARNICKI, T STOCK, V STRAUCH, K STROHBUSCH, U TOMPKINS, J TROST, HJ VANUITERT, B VANDEWALLE, RT VOGEL, H VOIGT, A VOLLAND, U WACHS, K WACKER, K WALK, W WEGENER, H WILLIAMS, DA ZSCHORSCH, P TI MEASUREMENT OF THE DECAY OF THE GAMMA-(1S) AND GAMMA(2S) RESONANCES TO MUON PAIRS SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID ELECTRON-POSITRON-ANNIHILATION; LEPTONIC BRANCHING RATIOS; MONTE-CARLO SIMULATION; RADIATIVE-CORRECTIONS; CROSS-SECTION; 2-PHOTON PROCESSES; BHABHA SCATTERING; JET FRAGMENTATION; E+E ANNIHILATION; HIGH-ENERGY AB Using the Crystal Ball detector at the e+e-storage ring DORIS II, we have measured the branching fraction to muon pairs B(mu-mu) of the UPSILON(1S) and UPSILON(2S) resonances and for the first time the product of the muonic partial width GAMMA(mu-mu) and the branching fraction to electrons B(ee) for both resonances. We obtain B(mu-mu) (1S) = (2.31 +/- 0.12 +/- 0.10)%, GAMMA(mu-mu) (1S) . B(ee) (1S) = (31.2 +/- 1.6 +/- 1.7) eV, and B(mu-mu) (2S) = (1.22 +/- 0.28 +/- 0.19)%, GAMMA(mu-mu) (2S) . B(ee) (2S) = (6.5 +/- 1.5 +/- 1.0) eV. Inserting the present world average value of B(ee) (1S) = (2.52 +/- 0.17)%, we determine the muonic partial width of the UPSILON(1S) as GAMMA(mu-mu) (1S) = (1.24 +/- 0.06 +/- 0.11) keV. In addition, we present the first indication of the expected interference between mu-pair production in the continuum and in UPSILON(1S) decays. C1 CALTECH, PASADENA, CA 91125 USA. UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA 95064 USA. CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA. CRACOW INST NUCL PHYS, PL-30055 KRAKOW, POLAND. DESY, W-2000 HAMBURG, GERMANY. UNIV FLORENCE, I-50121 FLORENCE, ITALY. IST NAZL FIS NUCL, I-50125 FLORENCE, ITALY. UNIV HAMBURG, INST EXPTL PHYS 1, W-2000 HAMBURG 13, GERMANY. NIKHEF NIJMEGEN, 6525 ED NIJMEGEN, NETHERLANDS. HARVARD UNIV, CAMBRIDGE, MA 02138 USA. HEPL, DEPT PHYS, STANFORD, CA 94305 USA. CATHOLIC UNIV NIJMEGEN, 6525 ED NIJMEGEN, NETHERLANDS. STANFORD UNIV, STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94305 USA. PRINCETON UNIV, PRINCETON, NJ 08544 USA. UNIV WURZBURG, W-8700 WURZBURG, GERMANY. CENS, DPHPE, F-91191 GIF SUR YVETTE, FRANCE. CERN, CH-1211 GENEVA 23, SWITZERLAND. AGH UNIV SCI & TECHNOL, INST PHYS & NUCL TECHN, PL-30055 KRAKOW, POLAND. RI Marlow, Daniel/C-9132-2014; Cavalli-Sforza, Matteo/H-7102-2015; Vogel, Helmut/N-8882-2014 OI Vogel, Helmut/0000-0002-6109-3023 NR 47 TC 7 Z9 7 U1 1 U2 3 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD FEB PY 1992 VL 53 IS 2 BP 193 EP 205 PG 13 WC Physics, Particles & Fields SC Physics GA HC888 UT WOS:A1992HC88800002 ER PT J AU ALBRECHT, R AWES, TC BECKMANN, P BERGER, F BLOOMER, MA BOCK, D BOCK, R CLAESSON, G CLEWING, G DRAGON, L EKLUND, A FERGUSON, RL FRANZ, A GARPMAN, S GLASOW, R GUSTAFSSON, HA GUTBROD, HH HARTIG, M HOLKER, G IDH, J JACOBS, P KAMPERT, KH KOLB, BW KRISTIANSSON, P LOHNER, H LUND, I OBENSHAIN, FE OSKARSSON, A OTTERLUND, I PEITZMANN, T PERSSON, S PLASIL, F POSKANZER, AM PURSCHKE, M RITTER, HG ROTERS, B SAINI, S SANTO, R SCHMIDT, HR SCHMIDT, R SORENSEN, SP STEFFENS, K STEINHAUSER, P STENLUND, E STUKEN, D TINCKNELL, ML TWYHUES, A YOUNG, GR AF ALBRECHT, R AWES, TC BECKMANN, P BERGER, F BLOOMER, MA BOCK, D BOCK, R CLAESSON, G CLEWING, G DRAGON, L EKLUND, A FERGUSON, RL FRANZ, A GARPMAN, S GLASOW, R GUSTAFSSON, HA GUTBROD, HH HARTIG, M HOLKER, G IDH, J JACOBS, P KAMPERT, KH KOLB, BW KRISTIANSSON, P LOHNER, H LUND, I OBENSHAIN, FE OSKARSSON, A OTTERLUND, I PEITZMANN, T PERSSON, S PLASIL, F POSKANZER, AM PURSCHKE, M RITTER, HG ROTERS, B SAINI, S SANTO, R SCHMIDT, HR SCHMIDT, R SORENSEN, SP STEFFENS, K STEINHAUSER, P STENLUND, E STUKEN, D TINCKNELL, ML TWYHUES, A YOUNG, GR TI BOSE-EINSTEIN CORRELATIONS IN THE TARGET FRAGMENTATION REGION IN 200A GEV O-16 + NUCLEUS COLLISIONS SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID HEAVY-ION COLLISIONS; PION INTERFEROMETRY; SOURCE PARAMETERS; INTERFERENCE; KCL; AR AB Correlations between positive pions are investigated in the target fragmentation region of 200A GeV O-16 + nucleus collisions. The pions are measured with the Plastic Ball detector in the WA80 experiment at the CERN SPS. The target mass dependence of the radii and the correlation strength extracted by interferometry is studied. A new approach to the fit of the correlation function is introduced. The correlation strength and both invariant and transverse radii increase with decreasing target mass. The transverse radius for O-16 + C reactions appears to be much larger than the geometrical radius of the nuclei involved. For the Au target only a small fraction of the measured pions contributes to the apparent correlation. Hints for a much larger second component in O-16 + Au reactions are observed. Rescattering phenomena may provide a clue to understand these phenomena. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37830. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV LUND,S-22362 LUND,SWEDEN. UNIV MUNSTER,W-4400 MUNSTER,GERMANY. RP ALBRECHT, R (reprint author), GESELLSCH SCHWERIONENFORSCH,W-6100 DARMSTADT,GERMANY. RI Peitzmann, Thomas/K-2206-2012; Lohner, Herbert/B-2397-2014; OI Peitzmann, Thomas/0000-0002-7116-899X; Lohner, Herbert/0000-0002-7441-739X; Kampert, Karl-Heinz/0000-0002-2805-0195 NR 26 TC 16 Z9 16 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD FEB PY 1992 VL 53 IS 2 BP 225 EP 237 PG 13 WC Physics, Particles & Fields SC Physics GA HC888 UT WOS:A1992HC88800005 ER PT J AU DECAMP, D DESCHIZEAUX, B GOY, C LEES, JP MINARD, MN ALEMANY, R CRESPO, JM DELFINO, M FERNANDEZ, E GAITAN, V GARRIDO, L MIR, LM PACHECO, A CATANESI, MG CREANZA, D DEPALMA, M FARILLA, A IASELLI, G MAGGI, G MAGGI, M NATALI, S NUZZO, S QUATTROMINI, M RANIERI, A RASO, G ROMANO, F RUGGIERI, F SELVAGGI, G SILVESTRIS, L TEMPESTA, P ZITO, G GAO, Y HU, H HUANG, D HUANG, X LIN, J LOU, J QIAO, C RUAN, T WANG, T XIE, Y XU, D XU, R ZHANG, J ZHAO, W ATWOOD, WB BAUERDICK, LAT BIRD, F BLUCHER, E BONVICINI, G BOSSI, F BOUDREAU, J BROWN, D BURNETT, TH DREVERMANN, H FORTY, RW GRAB, C HAGELBERG, R HAYWOOD, S HILGART, J JOST, B KASEMANN, M KNOBLOCH, J LACOURT, A LANCON, E LEHRAUS, I LOHSE, T LUSIANI, A MARCHIORO, A MARTINEZ, M MATO, P MENARY, S MINTEN, A MIOTTO, A MIQUEL, R MOSER, HG NASH, J PALAZZI, P RANJARD, F REDLINGER, G ROTH, A ROTHBERG, J ROTSCHEIDT, H SAICH, M SCHLATTER, D SCHMELLING, M TAKASHIMA, M TEJESSY, W WACHSMUTH, H WASSERBAECH, S WIEDENMANN, W WITZELING, W WOTSCHACK, J AJALTOUNI, Z BADAUD, F BARADADINOTWINOWSKA, M BENCHEIKH, AM ELFELLOUS, R FALVARD, A GAY, P GUICHENEY, C HARVEY, J HENRARD, P JOUSSET, J MICHEL, B MONTRET, JC PALLIN, D PERRET, P PRORIOL, J PRULHIERE, F STIMPFL, G BERTELSEN, H HANSEN, F HANSEN, JD HANSEN, JR HANSEN, PH LINDHAL, A MOLLERUD, R NILSSON, BS PETERSEN, G EFTHYMIOPOULOS, I SIMOPOULOU, E VAYAKI, A BADIER, J BLONDEL, A BONNEAUD, G BOUROTTE, J BRAEMS, F BRIENT, JC FOUQUE, G GAMESS, A GUIRLET, R ORTEU, S ROSOWSKY, A ROUGE, A RUMPF, M TANAKA, R VIDEAU, H CANDLIN, DJ VEITCH, E MONETA, L PARRINI, G CORDEN, M GEORGIOPOULOS, C IKEDA, M LANNUTTI, J LEVINTHAL, D MERMIKIDES, M SAWYER, L ANTONELLI, A BALDINI, R BENCIVENNI, G BOLOGNA, G CAMPANA, P CAPON, G CERUTTI, F CHIARELLA, V DETTORREPIAZZOLI, B FELICI, G LAURELLI, P MANNOCCHI, G MURTAS, F MURTAS, GP PASSALACQUA, L PEPEALTARELLI, M PICCHI, P ZOGRAFOU, P ALTOON, B BOYLE, O HALLEY, AW TENHAVE, I HEARNS, JL LYNCH, JG MORTON, WT RAINE, C SCARR, JM SMITH, K THOMPSON, AS TURNBULL, RM BRANDL, B BRAUN, O GEIGES, R GEWENIGER, C HANKE, P HEPP, V KLUGE, EE MAUMARY, Y PUTZER, A RENSCH, B STAHL, A TITTEL, K WUNSCH, M BELK, AT BEUSELINCK, R BINNIE, DM CAMERON, W CATTANEO, M DORNAN, PJ DUGEAY, S GREENE, AM HASSARD, JF LIESKE, NM PATTON, SJ PAYNE, DG PHILLIPS, MJ SEDGBEER, JK TAYLOR, G TOMALIN, IR WRIGHT, AG GIRTLER, P KUHN, D RUDOLPH, G BOWDERY, CK BRODBECK, TJ FINCH, AJ FOSTER, F HUGHES, G KEEMER, NR NUTTALL, M PATEL, A ROWLINGSON, BS SLOAN, T SNOW, SW WHELAN, EP BARCZEWSKI, T KLEINKNECHT, K RAAB, J RENK, B ROEHN, S SANDER, HG SCHMIDT, H STEEG, F WALTHER, SM WOLF, B AUBERT, JJ BENCHOUK, C BERNARD, V BONISSENT, A CARR, J COYLE, P DRINKARD, J ETIENNE, F PAPALEXIOU, S PAYRE, P PIETRZYK, B QIAN, Z ROUSSEAU, D SCHWEMLING, P TALBY, M BECKER, H BLUM, W CATTANEO, P COWAN, G DEHNING, B DIETL, H DYDAK, F FERNANDEZBOSMAN, M HANSLKOZANECKA, T JAHN, A KOZANECKI, W LANGE, E LAUBER, J LUTJENS, G LUTZ, G MANNER, W PAN, Y RICHTER, R SCHRODER, J SCHWARZ, AS SETTLES, R STIERLIN, U STDENIS, R THOMAS, J WOLF, G BERTIN, V BOUCROT, J CALLOT, O CHEN, X CORDIER, A DAVIER, M GANIS, G GRIVAZ, JF HEUSSE, P JANOT, P KIM, DW LEDIBERDER, F LEFRANCOIS, J LUTZ, AM VEILLET, JJ VIDEAU, I ZHANG, Z ZOMER, F ABBANEO, D AMENDOLIA, SR BAGLIESI, G BATIGNANI, G BOSISIO, L BOTTIGLI, U BRADASCHIA, C CARPINELLI, M CIOCCI, MA DELLORSO, R FERRANTE, I FIDECARO, F FOA, L FOCARDI, E FORTI, F GATTO, C GIASSI, A GIORGI, MA LIGABUE, F MANNELLI, EB MARROCCHESI, PS MESSINEO, A PALLA, F SANGUINETTI, G STEINBERGER, J TENCHINI, R TONELLI, G TRIGGIANI, G VANNINI, C VENTURI, A VERDINI, PG WALSH, J CARTER, JM GREEN, MG MARCH, PV MEDCALF, T QUAZI, IS STRONG, JA THOMAS, RM WEST, LR WILDISH, T BOTTERILL, DR CLIFFT, RW EDGECOCK, TR EDWARDS, M FISHER, SM JONES, TJ NORTON, PR SALMON, DP THOMPSON, JC BLOCHDEVAUX, B COLAS, P KLOPFENSTEIN, C LOCCI, E LOUCATOS, S MONNIER, E PEREZ, P PERLAS, JA PERRIER, F RANDER, J RENARDY, JF ROUSSARIE, A SCHULLER, JP SCHWINDLING, J VALLAGE, B ASHMAN, JG BOOTH, CN BUTTAR, C CARNEY, R CARTWRIGHT, S COMBLEY, F DINSDALE, M DOGRU, M HATFIELD, F MARTIN, J PARKER, D REEVES, P THOMPSON, LF BACH, E BARBERIO, E BRANDT, S BURKHARDT, H GILLESSEN, G GRUPEN, C HEITNER, G MEINHARD, H MIRABITO, L SCHAFER, U SEYWERD, H STUPPERICH, C TRIER, H ZEUNER, V GIANNINI, G GOBBO, B RAGUSA, F ROLANDI, L STIEGLER, U BELLANTONI, L CHEN, X CINABRO, D CONWAY, JS COWEN, DF FENG, Z FERGUSON, DPS GAO, YS GRAHL, J HARTON, JL JACOBSEN, JE JARED, RC JOHNSON, RP LECLAIRE, BW PAN, YB PATER, JR SAADI, Y SHARMA, V SHI, ZH TANG, YH WALSH, AM WEAR, JA WEBER, FV WHITNEY, MH WU, SL ZOBERNIG, G AF DECAMP, D DESCHIZEAUX, B GOY, C LEES, JP MINARD, MN ALEMANY, R CRESPO, JM DELFINO, M FERNANDEZ, E GAITAN, V GARRIDO, L MIR, LM PACHECO, A CATANESI, MG CREANZA, D DEPALMA, M FARILLA, A IASELLI, G MAGGI, G MAGGI, M NATALI, S NUZZO, S QUATTROMINI, M RANIERI, A RASO, G ROMANO, F RUGGIERI, F SELVAGGI, G SILVESTRIS, L TEMPESTA, P ZITO, G GAO, Y HU, H HUANG, D HUANG, X LIN, J LOU, J QIAO, C RUAN, T WANG, T XIE, Y XU, D XU, R ZHANG, J ZHAO, W ATWOOD, WB BAUERDICK, LAT BIRD, F BLUCHER, E BONVICINI, G BOSSI, F BOUDREAU, J BROWN, D BURNETT, TH DREVERMANN, H FORTY, RW GRAB, C HAGELBERG, R HAYWOOD, S HILGART, J JOST, B KASEMANN, M KNOBLOCH, J LACOURT, A LANCON, E LEHRAUS, I LOHSE, T LUSIANI, A MARCHIORO, A MARTINEZ, M MATO, P MENARY, S MINTEN, A MIOTTO, A MIQUEL, R MOSER, HG NASH, J PALAZZI, P RANJARD, F REDLINGER, G ROTH, A ROTHBERG, J ROTSCHEIDT, H SAICH, M SCHLATTER, D SCHMELLING, M TAKASHIMA, M TEJESSY, W WACHSMUTH, H WASSERBAECH, S WIEDENMANN, W WITZELING, W WOTSCHACK, J AJALTOUNI, Z BADAUD, F BARADADINOTWINOWSKA, M BENCHEIKH, AM ELFELLOUS, R FALVARD, A GAY, P GUICHENEY, C HARVEY, J HENRARD, P JOUSSET, J MICHEL, B MONTRET, JC PALLIN, D PERRET, P PRORIOL, J PRULHIERE, F STIMPFL, G BERTELSEN, H HANSEN, F HANSEN, JD HANSEN, JR HANSEN, PH LINDHAL, A MOLLERUD, R NILSSON, BS PETERSEN, G EFTHYMIOPOULOS, I SIMOPOULOU, E VAYAKI, A BADIER, J BLONDEL, A BONNEAUD, G BOUROTTE, J BRAEMS, F BRIENT, JC FOUQUE, G GAMESS, A GUIRLET, R ORTEU, S ROSOWSKY, A ROUGE, A RUMPF, M TANAKA, R VIDEAU, H CANDLIN, DJ VEITCH, E MONETA, L PARRINI, G CORDEN, M GEORGIOPOULOS, C IKEDA, M LANNUTTI, J LEVINTHAL, D MERMIKIDES, M SAWYER, L ANTONELLI, A BALDINI, R BENCIVENNI, G BOLOGNA, G CAMPANA, P CAPON, G CERUTTI, F CHIARELLA, V DETTORREPIAZZOLI, B FELICI, G LAURELLI, P MANNOCCHI, G MURTAS, F MURTAS, GP PASSALACQUA, L PEPEALTARELLI, M PICCHI, P ZOGRAFOU, P ALTOON, B BOYLE, O HALLEY, AW TENHAVE, I HEARNS, JL LYNCH, JG MORTON, WT RAINE, C SCARR, JM SMITH, K THOMPSON, AS TURNBULL, RM BRANDL, B BRAUN, O GEIGES, R GEWENIGER, C HANKE, P HEPP, V KLUGE, EE MAUMARY, Y PUTZER, A RENSCH, B STAHL, A TITTEL, K WUNSCH, M BELK, AT BEUSELINCK, R BINNIE, DM CAMERON, W CATTANEO, M DORNAN, PJ DUGEAY, S GREENE, AM HASSARD, JF LIESKE, NM PATTON, SJ PAYNE, DG PHILLIPS, MJ SEDGBEER, JK TAYLOR, G TOMALIN, IR WRIGHT, AG GIRTLER, P KUHN, D RUDOLPH, G BOWDERY, CK BRODBECK, TJ FINCH, AJ FOSTER, F HUGHES, G KEEMER, NR NUTTALL, M PATEL, A ROWLINGSON, BS SLOAN, T SNOW, SW WHELAN, EP BARCZEWSKI, T KLEINKNECHT, K RAAB, J RENK, B ROEHN, S SANDER, HG SCHMIDT, H STEEG, F WALTHER, SM WOLF, B AUBERT, JJ BENCHOUK, C BERNARD, V BONISSENT, A CARR, J COYLE, P DRINKARD, J ETIENNE, F PAPALEXIOU, S PAYRE, P PIETRZYK, B QIAN, Z ROUSSEAU, D SCHWEMLING, P TALBY, M BECKER, H BLUM, W CATTANEO, P COWAN, G DEHNING, B DIETL, H DYDAK, F FERNANDEZBOSMAN, M HANSLKOZANECKA, T JAHN, A KOZANECKI, W LANGE, E LAUBER, J LUTJENS, G LUTZ, G MANNER, W PAN, Y RICHTER, R SCHRODER, J SCHWARZ, AS SETTLES, R STIERLIN, U STDENIS, R THOMAS, J WOLF, G BERTIN, V BOUCROT, J CALLOT, O CHEN, X CORDIER, A DAVIER, M GANIS, G GRIVAZ, JF HEUSSE, P JANOT, P KIM, DW LEDIBERDER, F LEFRANCOIS, J LUTZ, AM VEILLET, JJ VIDEAU, I ZHANG, Z ZOMER, F ABBANEO, D AMENDOLIA, SR BAGLIESI, G BATIGNANI, G BOSISIO, L BOTTIGLI, U BRADASCHIA, C CARPINELLI, M CIOCCI, MA DELLORSO, R FERRANTE, I FIDECARO, F FOA, L FOCARDI, E FORTI, F GATTO, C GIASSI, A GIORGI, MA LIGABUE, F MANNELLI, EB MARROCCHESI, PS MESSINEO, A PALLA, F SANGUINETTI, G STEINBERGER, J TENCHINI, R TONELLI, G TRIGGIANI, G VANNINI, C VENTURI, A VERDINI, PG WALSH, J CARTER, JM GREEN, MG MARCH, PV MEDCALF, T QUAZI, IS STRONG, JA THOMAS, RM WEST, LR WILDISH, T BOTTERILL, DR CLIFFT, RW EDGECOCK, TR EDWARDS, M FISHER, SM JONES, TJ NORTON, PR SALMON, DP THOMPSON, JC BLOCHDEVAUX, B COLAS, P KLOPFENSTEIN, C LOCCI, E LOUCATOS, S MONNIER, E PEREZ, P PERLAS, JA PERRIER, F RANDER, J RENARDY, JF ROUSSARIE, A SCHULLER, JP SCHWINDLING, J VALLAGE, B ASHMAN, JG BOOTH, CN BUTTAR, C CARNEY, R CARTWRIGHT, S COMBLEY, F DINSDALE, M DOGRU, M HATFIELD, F MARTIN, J PARKER, D REEVES, P THOMPSON, LF BACH, E BARBERIO, E BRANDT, S BURKHARDT, H GILLESSEN, G GRUPEN, C HEITNER, G MEINHARD, H MIRABITO, L SCHAFER, U SEYWERD, H STUPPERICH, C TRIER, H ZEUNER, V GIANNINI, G GOBBO, B RAGUSA, F ROLANDI, L STIEGLER, U BELLANTONI, L CHEN, X CINABRO, D CONWAY, JS COWEN, DF FENG, Z FERGUSON, DPS GAO, YS GRAHL, J HARTON, JL JACOBSEN, JE JARED, RC JOHNSON, RP LECLAIRE, BW PAN, YB PATER, JR SAADI, Y SHARMA, V SHI, ZH TANG, YH WALSH, AM WEAR, JA WEBER, FV WHITNEY, MH WU, SL ZOBERNIG, G TI MEASUREMENT OF THE ABSOLUTE LUMINOSITY WITH THE ALEPH DETECTOR SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID BOSON RESONANCE PARAMETERS; E+E ANNIHILATION; RADIATIVE-CORRECTIONS; PHOTON CORRECTIONS; BHABHA SCATTERING; HIGH-ENERGIES; DECAYS; WIDTH; MASS; LEP AB We report on the absolute luminosity measurement performed with the ALEPH detector at LEP. The systematic errors of the measurements in 1990 are estimated to be 0.6% (experimental) and 0.3% (theoretical). C1 UNIV AUTONOMA BARCELONA,FIS ALTAS ENERGIAS LAB,E-08193 BARCELONA,SPAIN. UNIV BARI,IST NAZL FIS NUCL,SEZ BARI,I-70126 BARI,ITALY. UNIV BARI,DIPARTMENTO FIS,I-70126 BARI,ITALY. CHINESE ACAD SCI,INST HIGH ENERGY PHYS,BEIJING,PEOPLES R CHINA. CERN,EUROPEAN LAB PARTICLE PHYS,CH-1211 GENEVA 23,SWITZERLAND. UNIV CLERMONT FERRAND,CNRS,INST NATL PHYS NUCL & PHYS PARTICULES,PHYS CORPUSCLAIRE LAB,F-63177 CLERMONT FERRAND,FRANCE. NIELS BOHR INST,DK-2100 COPENHAGEN,DENMARK. DEMOCRITOS NUCL RES CTR,ATHENS,GREECE. CNRS,INST NATL PHYS NUCL & PHYS PARTICULES,ECOLE POLYTECH,PHYS NUCL & HAUTES ENERGIES LAB,F-91128 PALAISEAU,FRANCE. UNIV EDINBURGH,DEPT PHYS,EDINBURGH EH9 3JZ,MIDLOTHIAN,SCOTLAND. UNIV FLORENCE,IST NAZL FIS NUCL,DIPARTIMENTO FIS,SEZ FIRENZE,I-50125 FLORENCE,ITALY. FLORIDA STATE UNIV,SUPERCOMP COMP RES INST,TALLAHASSEE,FL 32306. FLORIDA STATE UNIV,DEPT PHYS,TALLAHASSEE,FL 32306. IST NAZL FIS NUCL,NAZL LAB,I-00044 FRASCATI,ITALY. UNIV GLASGOW,DEPT PHYS & ASTRON,GLASGOW G12 8QQ,SCOTLAND. UNIV HEIDELBERG,INST HOCHENERGIEPHYS,W-6900 HEIDELBERG,GERMANY. UNIV LONDON IMPERIAL COLL SCI & TECHNOL,DEPT PHYS,LONDON SW7 2BZ,ENGLAND. UNIV INNSBRUCK,INST EXPTL PHYS,A-6020 INNSBRUCK,AUSTRIA. UNIV LANCASTER,DEPT PHYS,LANCASTER LA1 4YB,ENGLAND. UNIV MAINZ,INST PHYS,W-6500 MAINZ,GERMANY. CNRS,INST NATL PHYS NUCL & PHYS PARTICULES,FAC SCI LUMINY,CTR PHYS PARTICULES,F-13288 MARSEILLE,FRANCE. MAX PLANCK INST PHYS & ASTROPHYS,WERNER HEISENBERG INST PHYS,W-8000 MUNICH 40,GERMANY. UNIV PARIS 11,CNRS,INST NATL PHYS NUCL & PHYS PARTICULES,ACCELERATEUR LINEAIRE,F-91405 ORSAY,FRANCE. UNIV PISA,IST NAZL FIS NUCL,DIPARTIMENTO FIS,SEZ PISA,I-56010 PISA,ITALY. SCUOLA NORMALE SUPER PISA,I-56010 PISA,ITALY. UNIV LONDON,ROYAL HOLLOWAY & BEDFORD NEW COLL,DEPT PHYS,LONDON TW20 0EX,ENGLAND. RUTHERFORD APPLETON LAB,DEPT PARTICLE PHYS,DIDCOT OX11 0QX,OXON,ENGLAND. CENS,DEPT PHYS PARTICULES ELEMENTAIRES,F-91191 GIF SUR YVETTE,FRANCE. UNIV SHEFFIELD,DEPT PHYS,SHEFFIELD S3 7RH,S YORKSHIRE,ENGLAND. UNIV SIEGEN,FACHBEREICH PHYS,W-5900 SIEGEN,GERMANY. UNIV TRIESTE,DIPARTMENTO FIS,I-34127 TRIESTE,ITALY. IST NAZL FIS NUCL,SEZ TRIESTE,I-34127 TRIESTE,ITALY. UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706. SLAC,STANFORD,CA 94309. UNIV WASHINGTON,SEATTLE,WA 98195. UNIV TURIN,IST FIS GEN,I-10124 TURIN,ITALY. CNR,IST COSMO GEOFIS,TURIN,ITALY. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. CERN,DIV PPE,CH-1211 GENEVA 23,SWITZERLAND. RP DECAMP, D (reprint author), CNRS,INST NATL PHYS NUCL & PHYS PARTICULES,PHYS PARTICULES LAB,F-74019 ANNECY LE VIELIX,FRANCE. RI Bosman, Martine/J-9917-2014; Fernandez, Enrique/L-5387-2014; Mir, Lluisa-Maria/G-7212-2015; ciocci, maria agnese /I-2153-2015; Hansen, John/B-9058-2015; Lusiani, Alberto/N-2976-2015; Marrocchesi, Pier Simone/N-9068-2015; Lusiani, Alberto/A-3329-2016; Murtas, Fabrizio/B-5729-2012; Booth, Christopher/B-5263-2016; Pacheco Pages, Andres/C-5353-2011; Ferrante, Isidoro/F-1017-2012; Colas, Paul/F-2876-2013; Delfino, Manuel/A-1545-2012; ANTONELLI, ANTONELLA/C-6238-2011; Buttar, Craig/D-3706-2011; Stahl, Achim/E-8846-2011; Passalacqua, Luca/F-5127-2011; St.Denis, Richard/C-8997-2012; Forti, Francesco/H-3035-2011; Focardi, Ettore/E-7376-2012; Venturi, Andrea/J-1877-2012; Perrier, Frederic/A-5953-2011; Rolandi, Luigi (Gigi)/E-8563-2013; Ligabue, Franco/F-3432-2014; OI Bosman, Martine/0000-0002-7290-643X; Fernandez, Enrique/0000-0002-6405-9488; Mir, Lluisa-Maria/0000-0002-4276-715X; ciocci, maria agnese /0000-0003-0002-5462; Hansen, John/0000-0002-8422-5543; Lusiani, Alberto/0000-0002-6876-3288; Marrocchesi, Pier Simone/0000-0003-1966-140X; Lusiani, Alberto/0000-0002-6876-3288; Booth, Christopher/0000-0002-6051-2847; Pacheco Pages, Andres/0000-0001-8210-1734; Ferrante, Isidoro/0000-0002-0083-7228; Delfino, Manuel/0000-0002-9468-4751; Stahl, Achim/0000-0002-8369-7506; Forti, Francesco/0000-0001-6535-7965; Focardi, Ettore/0000-0002-3763-5267; Rolandi, Luigi (Gigi)/0000-0002-0635-274X; Palazzi, Paolo/0000-0002-4861-391X; RASO, Giuseppe/0000-0002-5660-3711; Bottigli, Ubaldo/0000-0002-0666-3433; Ligabue, Franco/0000-0002-1549-7107; Bloch-Devaux, Brigitte/0000-0002-2463-1232; Murtas, Fabrizio/0000-0002-7041-6541; Garrido Beltran, Lluis/0000-0001-8883-6539; Edgecock, Rob/0000-0002-7896-3312 NR 32 TC 14 Z9 14 U1 0 U2 3 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD FEB PY 1992 VL 53 IS 3 BP 375 EP 390 PG 16 WC Physics, Particles & Fields SC Physics GA HF074 UT WOS:A1992HF07400003 ER PT J AU SUKHATME, U WILK, G LASSILA, KE AF SUKHATME, U WILK, G LASSILA, KE TI GLUON STRUCTURE FUNCTIONS IN NUCLEI FROM THE QUARK CLUSTER MODEL SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID INELASTIC MUON SCATTERING; ELECTRON-SCATTERING; IRON TARGETS; SMALL VALUES; 6 QUARKS; DEUTERIUM; DEPENDENCE; PI; CHROMODYNAMICS; DISTRIBUTIONS AB The quark cluster model has been previously shown to give a good description of the EMC effect and Drell-Yan dimuon pair production on nuclear targets at all values of the momentum fraction x. Here, we extend the quark cluster model in order to predict R(G)(x), the ratio of gluon structure functions in nuclei and nucleons. We find an increase in the average gluon momentum fraction as a function of the nucleon number A, which agrees with recent results of the New Muon Collaboration (NMC) experiment. C1 SOLTAN INST NUCL STUDIES,PL-00681 WARSAW,POLAND. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. RP SUKHATME, U (reprint author), UNIV ILLINOIS,DEPT PHYS,CHICAGO,IL 60680, USA. NR 55 TC 10 Z9 10 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD FEB PY 1992 VL 53 IS 3 BP 439 EP 442 DI 10.1007/BF01625903 PG 4 WC Physics, Particles & Fields SC Physics GA HF074 UT WOS:A1992HF07400010 ER PT J AU GOCKSCH, A SONI, A AF GOCKSCH, A SONI, A TI CONSTITUENT QUARK SCREENING LENGTHS IN FINITE TEMPERATURE LATTICE QCD SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID WILSON FERMIONS; CHIRAL SYMMETRY; PLASMA; PARITY; GAUGE AB Landau gauge quark propagators are calculated in both the confined and the deconfined phases of QCD. We discuss the magnitude of the resulting screening lengths as well as aspects of chiral symmetry relevant to the quark propagator. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP GOCKSCH, A (reprint author), UNIV CALIF SANTA BARBARA,INST THEORET PHYS,SANTA BARBARA,CA 93106, USA. NR 18 TC 2 Z9 2 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD FEB PY 1992 VL 53 IS 3 BP 517 EP 520 DI 10.1007/BF01625913 PG 4 WC Physics, Particles & Fields SC Physics GA HF074 UT WOS:A1992HF07400020 ER PT J AU GADOMSKI, W XU, J SETSER, DW NELSON, TO AF GADOMSKI, W XU, J SETSER, DW NELSON, TO TI QUENCHING CONSTANTS OF KRF (B, C) BY KR AND XE AND THE KRF (B, C) EQUILIBRIUM-CONSTANT SO CHEMICAL PHYSICS LETTERS LA English DT Article ID LASERS; GAS; RELAXATION; MIXTURES; KINETICS; AR; NE; HE AB The two-photon, photo-assisted reaction between Kr and F2 has been used to prepare KrF(B, C) molecules with a 7 ns laser pulse for subsequent decay measurement in Kr and Xe/Kr mixtures. The two- and three-body quenching constants in Kr are (4.0 +/- 1.0) x 10(-12) cm3 s-1 and (6.0 +/- 2.0) x 10(-31) cm6 s-1, respectively. The KrF(B, C) equilibrium constant at 300 K is almost-equal-to 4-5 with KrF(C) as the lower energy state. Quenching of KrF(B, C) by Xe gives XeF(B, C), and possibly some XeF(D), as a product with a rate constant of (10 +/- 2) x 10(-11) cm3 s-1. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. UNIV WARSAW,DEPT CHEM,PL-00325 WARSAW,POLAND. INST OPT & FINE MECH,SHANGHAI,PEOPLES R CHINA. RP GADOMSKI, W (reprint author), KANSAS STATE UNIV AGR & APPL SCI,DEPT CHEM,MANHATTAN,KS 66506, USA. NR 21 TC 11 Z9 11 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD JAN 31 PY 1992 VL 189 IS 2 BP 153 EP 158 DI 10.1016/0009-2614(92)85115-Q PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HD869 UT WOS:A1992HD86900009 ER PT J AU CHEUNG, NH YEUNG, ES AF CHEUNG, NH YEUNG, ES TI PULSED LASER PHOTODISSOCIATION OF CHROMIUM HEXACARBONYL AT 308 NM - SIMULTANEOUS MONITORING OF OPTICAL AND ACOUSTIC EMISSIONS SO CHEMICAL PHYSICS LETTERS LA English DT Article ID MULTI-PHOTON IONIZATION; METAL-CARBONYLS; GAS-PHASE; MULTIPHOTON DISSOCIATION; CR(CO)6; DEPOSITION; FILMS; SPECTROSCOPY; ATOMS; BEAM AB A novel, yet simple, acoustic technique was applied to measure the molar number of fragments formed in the XeCl laser-induced gas-phase photodissociation of Cr(CO)6. The bluish-green Cr emission was also monitored and correlated with the acoustic signal. At 0.16 Torr of hexacarbonyl and for fluences below almost-equal-to 25 mJ/cm2, the optical signal varied as the cube of the laser fluence, in agreement with the model that highly excited Cr atoms were produced by three-photon processes. The acoustic signal y (mV) varied with fluence F (mJ/cm2) as y = 1.77F + 0.15F2, consistent with the model that most fragments were formed via two sequential single-photon processes. Both optical and acoustic signals showed onset of saturation at almost-equal-to 25 mJ/cm2, suggesting that single-photon photolysis was the primary Cr(CO)6 depletion process. Quite expectedly, with a constant fluence of almost-equal-to 20 mJ/cm2 and varying hexacarbonyl pressure, the optical and acoustic signals were linearly correlated. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP CHEUNG, NH (reprint author), HONG KONG BAPTIST COLL,DEPT PHYS,WATERLOO ROAD,HONG KONG,HONG KONG. NR 21 TC 7 Z9 7 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD JAN 31 PY 1992 VL 189 IS 2 BP 164 EP 170 DI 10.1016/0009-2614(92)85117-S PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HD869 UT WOS:A1992HD86900011 ER PT J AU SUN, JJ FRITZ, JS AF SUN, JJ FRITZ, JS TI CHEMICALLY MODIFIED RESINS FOR SOLID-PHASE EXTRACTION SO JOURNAL OF CHROMATOGRAPHY LA English DT Article ID PERFORMANCE LIQUID-CHROMATOGRAPHY; GRAPHITIZED CARBON-BLACK; ORGANIC CONTAMINANTS; WATER; CARTRIDGES; SORPTION AB The packings most widely used for solid-phase extraction are hydrophobic and make poor surface contact with aqueous samples unless the resins are first treated with an activating organic solvent such as methanol. Insertion of an acetyl- or hydroxymethyl group into a porous polystyrene-divinylbenzene resin provides a more hydrophilic surface that is easily wetted by water alone. Small columns of the chemically modified resins were found to be very efficient for the solid-phase extraction of many types of organic solutes from aqueous samples. Comparative recovery studies showed that the modified resins are superior to both silica packings and unmodified organic resins for the solid-phase extraction of organic compounds, and especially for polar organics such as phenols. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,DEPT CHEM,AMES,IA 50011. NR 17 TC 93 Z9 94 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR PD JAN 31 PY 1992 VL 590 IS 2 BP 197 EP 202 DI 10.1016/0021-9673(92)85382-4 PG 6 WC Chemistry, Analytical SC Chemistry GA HD463 UT WOS:A1992HD46300003 ER PT J AU MACGREGOR, RR FOWLER, JS WOLF, AP AF MACGREGOR, RR FOWLER, JS WOLF, AP TI DETERMINATION OF THE ENANTIOMERIC COMPOSITION OF SAMPLES OF COCAINE BY NORMAL-PHASE HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY WITH UV DETECTION SO JOURNAL OF CHROMATOGRAPHY LA English DT Note ID OPTICAL ISOMERS; (+)-COCAINE; SEPARATION; RECEPTORS; ELUENTS; BRAIN AB A high-performance liquid chromatographic method has been developed for the quantitation of the enantiomers of cocaine. Mixtures of the naturally occurring (-)-cocaine and synthetically produced (+)-cocaine were hydrolyzed in water to (+) and (-)-benzoyl ecgonine. Esterification with an optically pure 2-octanol resulted in diastereoisomers that could be separated on bare silica gel using an acetonitrile-aqueous ammonium phosphate mobile phase. RP MACGREGOR, RR (reprint author), BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973, USA. FU NIDA NIH HHS [DA06278] NR 14 TC 7 Z9 7 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR PD JAN 31 PY 1992 VL 590 IS 2 BP 354 EP 358 DI 10.1016/0021-9673(92)85398-D PG 5 WC Chemistry, Analytical SC Chemistry GA HD463 UT WOS:A1992HD46300019 PM 1560102 ER PT J AU WANG, BQ GENG, GQ LEVY, AV MACK, W AF WANG, BQ GENG, GQ LEVY, AV MACK, W TI EROSIVITY OF PARTICLES IN CIRCULATING FLUIDIZED-BED COMBUSTORS SO WEAR LA English DT Article ID ELEVATED-TEMPERATURE EROSION; CORROSION; STEEL AB The metal wastage of superheater tubes in the convection pass region of circulating fluidized bed combustors is a current problem. An investigation was carried out to determine what kinds of metal loss rates and mechanisms occurred when the various types of particles from two circulating fluidized bed combustors were used as erodents in a laboratory blast nozzle tester. The laboratory tests were compared with in-service exposures. A loss mechanism was established that was based on metal losses and the observed microstructures of eroded-corroded surfaces. It was determined that the particles must be strong enough not to shatter upon impact in order to be erosive and that more angular and larger size particles have higher erosivities. The laboratory and in-service loss mechanisms were determined to be similar. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. BABCOCK & WILCOX CO,FOSSIL OPERAT OFF,BARBERTON,OH 44203. RP WANG, BQ (reprint author), XIAN INST HIGHWAYS,XIAN,PEOPLES R CHINA. NR 11 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0043-1648 J9 WEAR JI Wear PD JAN 31 PY 1992 VL 152 IS 2 BP 201 EP 222 DI 10.1016/0043-1648(92)90121-N PG 22 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA HJ240 UT WOS:A1992HJ24000001 ER PT J AU GROPP, WD KEYES, DE AF GROPP, WD KEYES, DE TI DOMAIN DECOMPOSITION METHODS IN COMPUTATIONAL FLUID-DYNAMICS SO INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS LA English DT Article DE DOMAIN DECOMPOSITION; COMPUTATIONAL FLUID DYNAMICS; PRECONDITIONED KRYLOV ITERATION; NEWTON METHOD; LOCALLY UNIFORM MESH REFINEMENT ID FLOW; STEP AB The divide-and-conquer paradigm of iterative domain decomposition or substructuring has become a practical tool in computational fluid dynamics applications because of its flexibility in accommodating adaptive refinement through locally uniform (or quasi-uniform) grids, its ability to exploit multiple discretizations of the operator equations, and the modular pathway it provides towards parallelism. We illustrate these features on the classic model problem of flow over a backstep using Newton's method as the non-linear iteration. Multiple discretizations (second-order in the operator and first-order in the pre-conditioner) and locally uniform mesh refinement pay dividends separately and can be combined synergistically. We include sample performance results from an Intel iPSC/860 hypercube implementation. C1 NASA,LANGLEY RES CTR,INST COMP APPLICAT SCI & ENGN,HAMPTON,VA 23665. YALE UNIV,DEPT MECH ENGN,NEW HAVEN,CT 06520. RP GROPP, WD (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439, USA. OI Gropp, William/0000-0003-2905-3029 NR 29 TC 16 Z9 16 U1 1 U2 1 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0271-2091 J9 INT J NUMER METH FL JI Int. J. Numer. Methods Fluids PD JAN 30 PY 1992 VL 14 IS 2 BP 147 EP 165 DI 10.1002/fld.1650140203 PG 19 WC Computer Science, Interdisciplinary Applications; Mathematics, Interdisciplinary Applications; Mechanics; Physics, Fluids & Plasmas SC Computer Science; Mathematics; Mechanics; Physics GA HA198 UT WOS:A1992HA19800002 ER PT J AU DOOLEY, K SWANSON, ES BARNES, T AF DOOLEY, K SWANSON, ES BARNES, T TI A PREDICTION OF SPIN-0 AND SPIN-2 VECTOR-MESON MOLECULES - A NEW MODEL OF THE THETA(1720) SO PHYSICS LETTERS B LA English DT Article ID J-PSI; RADIATIVE DECAYS; QUARK-MODEL; SYSTEM; GEV/C AB A Born approximation calculation for vector-mesons interacting through quark- and gluon-exchange suggests that loosely bound deuteron-like "molecule" states of vector-meson pairs may occur in the (I, J(PC)) = (0, 0++), (0, 2++), (1, 0++) and (1, 2++) S-wave (K*, K (K*, K*BAR, omega-phi) and (K*K*BAR, rho-phi) systems below K*K*BAR threshold. We tentatively identify the (0, 0++) state with the theta (1720); this assignment explains several unusual properties of this resonance, including some strong branching fractions and couplings in psi-radiative decays. Tests of this model and decay channels in which we expect evidence of additional vector-meson bound states are discussed. C1 UNIV TORONTO,DEPT PHYS,TORONTO M5S 1A7,ONTARIO,CANADA. OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,CTR COMPUTAT INTENS PHYS,OAK RIDGE,TN 37831. RP DOOLEY, K (reprint author), UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996, USA. NR 38 TC 42 Z9 43 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD JAN 30 PY 1992 VL 275 IS 3-4 BP 478 EP 486 DI 10.1016/0370-2693(92)91620-O PG 9 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HH410 UT WOS:A1992HH41000037 ER PT J AU KAWANO, LH FULLER, GM MALANEY, RA SAVAGE, MJ AF KAWANO, LH FULLER, GM MALANEY, RA SAVAGE, MJ TI LIMITS ON MAGNETIC-MOMENTS OF HEAVY NEUTRINOS FROM NUCLEOSYNTHESIS SO PHYSICS LETTERS B LA English DT Article AB Dirac neutrinos with masses in the MeV range and having "standard model" magnetic moments are known to violate the cosmological He-4 bound. We calculate the value of the magnetic dipole moment of Dirac neutrinos in the mass range 5-35 MeV which would allow for consistency with the inferred primordial abundances of H-2, He-3, He-4 and Li-7. C1 UNIV CALIF SAN DIEGO,DEPT PHYS,LA JOLLA,CA 92093. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,INST GEOPHYS & PLANETARY PHYS,BERKELEY,CA 94720. RUTGERS STATE UNIV,DEPT PHYS & ASTRON,PISCATAWAY,NJ 08854. RP KAWANO, LH (reprint author), CALTECH,KELLOGG RADIAT LAB,PASADENA,CA 91125, USA. RI Malaney, Robert/F-6588-2012 OI Malaney, Robert/0000-0001-9672-5601 NR 13 TC 11 Z9 11 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD JAN 30 PY 1992 VL 275 IS 3-4 BP 487 EP 490 DI 10.1016/0370-2693(92)91621-F PG 4 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HH410 UT WOS:A1992HH41000038 ER PT J AU NIAZI, M KARAGEORGI, E AF NIAZI, M KARAGEORGI, E TI IRREGULAR GEOMETRY OF THE GORDA SUBDUCTION AND DEEP-STRUCTURE OF THE EEL RIVER BASIN DETERMINED FROM TELESEISMIC-P DELAYS SO TECTONOPHYSICS LA English DT Article; Proceedings Paper CT SYMP ON DETAILED STRUCTURE AND PROCESSES OF ACTIVE MARGINS CY AUG 25, 1989 CL ISTANBUL, TURKEY SP INT ASSOC SEISMOL & PHYS EARTHS INTERIOR ID 3-DIMENSIONAL SEISMIC STRUCTURE; NORTHERN CALIFORNIA; LITHOSPHERE; RESIDUALS; TECTONICS AB Nearly 1000 observations of travel-time residuals for teleseismic P arrivals across the Humboldt Bay Seismic Network near Cape Mendocino, California, are analyzed for a study of 3-D geometry of the Gorda plate near Mendocino Triple Junction (MTJ), by the application of a three-dimensional velocity inversion procedure. The area is underlain by the subducted edge of the Gorda plate and the eastward extension of the Mendocino Fracture Zone. The observed variation of the travel-time gradient with azimuth favors either deepening of the slab southward, or southward increase of dilatational velocity across the Mendocino Fracture Zone at depths of more than 50 km. The topographically corrected mean travel-time delays at individual stations suggest that the Eel River basin is deep and tectonically controlled. Further support for this view is provided by the inversion results, which point to the possible extension of the low-velocity material through the entire crustal section. These results also suggest that from the south, the Eel River basin may be confined at depth by a steeply northward-dipping sliver of high-velocity material (possibly a detached oceanic slab). This feature may be responsible for the intense seismic activity reported beneath the eastern end of the. Mendocino Fracture Zone (MFZ). Thus, the role of the Eel River basin in accommodating the relative motion between the adjacent plates, may be significant. The leading edge of the downgoing slab appears irregular and at some latitudes may not extend beyond the coast line. The estimated velocity anomalies vary by as much as 20% in the near-surface blocks and nearly half as much at depth. The pattern may result from intense tearing and deformation of the slab, producing buckling, folding and compression ridges. RP NIAZI, M (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV EARTH SCI,CTR COMPUTAT SEISMOL,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 27 TC 1 Z9 1 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0040-1951 J9 TECTONOPHYSICS JI Tectonophysics PD JAN 30 PY 1992 VL 201 IS 3-4 BP 209 EP 228 DI 10.1016/0040-1951(92)90234-W PG 20 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA HF531 UT WOS:A1992HF53100003 ER PT J AU STUPIK, PD DONOVAN, MM BARRON, AR JERVIS, TR NASTASI, M AF STUPIK, PD DONOVAN, MM BARRON, AR JERVIS, TR NASTASI, M TI THE INTERFACIAL MIXING OF SILICON COATINGS ON NIOBIUM METAL - A COMPARATIVE-STUDY SO THIN SOLID FILMS LA English DT Article ID SI(111); GROWTH; LASER AB Graded interfaces between niobium substrates and evaporated silicon films were obtained through thermal annealing, ion-beam mixing and laser mixing. The samples were characterized with Rutherford backscattering, Auger electron spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy and X-ray diffraction. Thermal annealing was found to produce asymmetric interfacial gradients, while ion-beam and laser treatment produced symmetric gradients. Samples were subjected to heating in dry oxygen at 650-degrees-C in order to study the thermal oxidation stability of the coatings. The amorphous laser-mixed, then ion-beam treated samples were found to be resistant to severe oxidation. It was concluded that a smoothly graded interfacial region will be stable with respect to thermal and lattice mismatch; but if the mixed zone is crystalline, grain-boundary oxidation occurs. C1 HARVARD UNIV,DEPT CHEM,CAMBRIDGE,MA 02138. HARVARD UNIV,MAT RES LAB,CAMBRIDGE,MA 02138. UNIV CALIF LOS ALAMOS SCI LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545. OI Barron, Andrew/0000-0002-2018-8288 NR 14 TC 3 Z9 5 U1 1 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0040-6090 J9 THIN SOLID FILMS JI Thin Solid Films PD JAN 30 PY 1992 VL 207 IS 1-2 BP 138 EP 143 DI 10.1016/0040-6090(92)90114-Q PG 6 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA HE888 UT WOS:A1992HE88800027 ER PT J AU ALNAJJAR, MS FRANZ, JA AF ALNAJJAR, MS FRANZ, JA TI A KINETIC-STUDY OF THE MIGRATION OF A PHENYL GROUP FROM SULFUR TO A CARBON RADICAL CENTER - REARRANGEMENT OF THE ALPHA-(PHENYLTHIO)BENZYL RADICAL SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID NEOPHYL-LIKE REARRANGEMENT; ABSOLUTE RATE CONSTANTS; SEMIEMPIRICAL METHODS; SELF-TERMINATION; PARAMETERS; ABSTRACTION; HYDROGEN; TRIBUTYLSTANNANE; THERMOCHEMISTRY; 2-ALLYLBENZYL AB The first rate constants for the neophyl-like 1,2-phenyl migration from sulfur to a carbon-centered radical site are reported. An Arrhenius expression was determined for the neophyl-like 1,2-phenyl migration reaction of the alpha-(phenylthio)benzyl radical (2) to form the diphenylmethylthio radical (6) in nonane at 160-215-degrees-C: log (k/s-1) = (10.65 +/- 0.74) - (21.4 +/-1.55)/theta, theta = 2.3 RT kcal/mol (errors are 1-sigma). The rate constants were measured in a competition between the rearrangement of 2 versus hydrogen abstraction from thiophenol in nonane. The basis rate expression for hydrogen abstraction, log (k(abs)/M-1 s-1) = (8.60 +/- 0.02) - (6.64 +/- 0.03)/theta, was determined by a competition between self-termination (k(t)) of 2 and abstraction (k(abs)) from thiophenol from 27 to 220-degrees-C in nonane. The relative rate expression, log (k(abs)/k(t)1/2) = 2.86 - 5.24/theta, was converted to the absolute rate expression for abstraction by use of the von Smoluchowski expression for the self-reaction of 2, log (k(t)1/2) = 5.74 - 1.40/theta. Experimental diffusion coefficients of benzyl phenyl sulfide in nonane were determined for comparison with calculated values for modeling the diffusion of 2. MNDO-PM3(RHF) calculations predict that the rearrangement 2 --> 6 proceeds through a transitional structure, 10, rather than an intermediate. Substituted thiaspiro[2.5]octadienyl and thiiranylcarbinyl radicals are predicted to exhibit no or low (0.5 kcal/mol) barriers to C-S cleavage, respectively, suggesting that thiiranylcarbinyl radicals are candidates for picosecond radical clocks. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 58 TC 21 Z9 20 U1 1 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD JAN 29 PY 1992 VL 114 IS 3 BP 1052 EP 1058 DI 10.1021/ja00029a038 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA HB537 UT WOS:A1992HB53700038 ER PT J AU RESS, D LERCHE, RA DASILVA, L AF RESS, D LERCHE, RA DASILVA, L TI DEMONSTRATION OF AN X-RAY RING-APERTURE MICROSCOPE FOR INERTIAL-CONFINEMENT FUSION EXPERIMENTS SO APPLIED PHYSICS LETTERS LA English DT Article ID LASER AB We are investigating the use of annular (ring) apertures to image high-energy x-ray emission (> 4 keV) from inertial-confinement fusion targets. In our scheme, a coded image is formed on a detector (such as x-ray film) by x rays that pass through a narrow annulus cut in a sheet of high-Z material such as gold. Signal-to-noise ratio calculations show a factor of 10 advantage of ring-aperture imaging over conventional pinhole imaging. Simultaneous pinhole and ring-aperture images of small (almost-equal-to 20-mu-m diam), laser-driven, x-ray sources were obtained in recent experiments. We used a 10-mu-m-wide, 1-mm-diam annulus in a 6-mu-m thickness of gold; a 10-mu-m-diam pinhole was in the center of the annulus. Unfolds of the coded images have signal-to-noise ratios a factor of 20 larger than the pinhole images. The ring-aperture microscope is a promising new technique to image inertial-confinement fusion targets and other compact sources of high-energy x rays. RP RESS, D (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 7 TC 14 Z9 16 U1 1 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JAN 27 PY 1992 VL 60 IS 4 BP 410 EP 412 DI 10.1063/1.106673 PG 3 WC Physics, Applied SC Physics GA HB055 UT WOS:A1992HB05500004 ER PT J AU RIVIER, N AF RIVIER, N TI THE STRUCTURE AND DYNAMICS OF PATTERNS OF BENARD CONVECTION CELLS SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID COLLOIDAL CRYSTALS; CRYSTALLOGRAPHY; PHYLLOTAXIS; DEFECTS AB Benard-Marangoni convection, in containers with large aspect ratio, exhibits space-filling cellular structures, highly deformable, but crystallized. They contain dislocations and grain boundaries generated and moved by elementary topological transformations, and are subjected to a weak shear stress due to the earth's rotation. The cellular structure and its fluctuations are analysed from a crystallographic viewpoint, by using two complementary approaches. One is a global analysis of cellular structures in cylindrical symmetry. Their structural stability and defect pattern are obtained as topological mode-locking of a continuous structural parameter. The other, a local, molecular dynamics of the cells, gives a realistic parametrization of the forces and the transformations by generalizing the Voronoi cell construction' in one extra dimension. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV LONDON IMPERIAL COLL SCI & TECHNOL,BLACKETT LAB,LONDON SW7 2AZ,ENGLAND. RP RIVIER, N (reprint author), UNIV LAUSANNE,INST PHYS EXPTL,CH-1015 DORIGNY LAUSANNE,SWITZERLAND. NR 44 TC 8 Z9 8 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD JAN 27 PY 1992 VL 4 IS 4 BP 931 EP 943 DI 10.1088/0953-8984/4/4/004 PG 13 WC Physics, Condensed Matter SC Physics GA HC709 UT WOS:A1992HC70900004 ER PT J AU CARENA, M CLARK, TE WAGNER, CEM BARDEEN, WA SASAKI, K AF CARENA, M CLARK, TE WAGNER, CEM BARDEEN, WA SASAKI, K TI DYNAMIC SYMMETRY-BREAKING AND THE TOP QUARK MASS IN THE MINIMAL SUPERSYMMETRIC STANDARD MODEL SO NUCLEAR PHYSICS B LA English DT Article ID SOFTLY BROKEN SUPERSYMMETRY; YANG-MILLS THEORIES; GROUP FIXED-POINTS; CHIRAL-SYMMETRY; INTERMEDIATE SCALE; SUPERGRAVITY; BOSONS AB The minimal supersymmetric extension of the standard model is studied, when the electroweak symmetry breakdown relies on the formation of condensates involving the third generation of quarks and their supersymmetric partners. The top quark mass is obtained as a function of the compositeness scale-LAMBDA and the soft supersymmetry breaking scale, DELTA(S). The dependence of the top quark mass on the ratio of the Higgs vacuum expectation values, as well as a function of the lightest Higgs mass, is analyzed. We show that, when LAMBDA congruent-to 10(16) GeV, the characteristic top quark mass in this model is 140 GeV less-than-or-equal-to m(t) less-than-or-equal-to 195 GeV, a prediction that is only slightly dependent on the value of DELTA(S). C1 PURDUE UNIV,DEPT PHYS,W LAFAYETTE,IN 47907. FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. YOKOHAMA NATL UNIV,DEPT PHYS,YOKOHAMA,KANAGAWA 240,JAPAN. NR 52 TC 71 Z9 71 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD JAN 27 PY 1992 VL 369 IS 1-2 BP 33 EP 53 DI 10.1016/0550-3213(92)90377-N PG 21 WC Physics, Particles & Fields SC Physics GA HC504 UT WOS:A1992HC50400002 ER PT J AU AOYAMA, H KIKUCHI, H AF AOYAMA, H KIKUCHI, H TI A NEW VALLEY METHOD FOR INSTANTON DEFORMATION SO NUCLEAR PHYSICS B LA English DT Article ID QUANTITATIVE THEORY; WEAK-INTERACTIONS; BARYON-NUMBER; LIQUID; ENERGY; TEV AB Instanton and anti-instanton configurations used in evaluating the baryon- and lepton-number violation process in the standard model are investigated. Although not solutions of the field equations, such configurations play a crucial role in evaluating the relevant amplitudes. The streamline method, which has been employed for this purpose, is examined. A new method that has better features than the streamline method is proposed. The trajectory in configuration space that leads to the instanton and anti-instanton configuration is traced from vacuum using the new method. C1 KYOTO UNIV,YUKAWA INST THEORET PHYS,KYOTO 606,JAPAN. RP AOYAMA, H (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 23 TC 25 Z9 25 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD JAN 27 PY 1992 VL 369 IS 1-2 BP 219 EP 234 DI 10.1016/0550-3213(92)90384-N PG 16 WC Physics, Particles & Fields SC Physics GA HC504 UT WOS:A1992HC50400009 ER PT J AU BARDAKCI, K AF BARDAKCI, K TI THE CLASSICAL PARAFERMION ALGEBRA, ITS GENERALIZATION AND ITS QUANTIZATION SO NUCLEAR PHYSICS B LA English DT Article ID CONFORMAL FIELD-THEORIES; COSET MODELS; 2 DIMENSIONS; BOSONIZATION; CONSTRUCTION AB The Poisson bracket algebra of the classical parafermions derived earlier from the lagrangian description of conformal coset models is generalized. It is also shown how to quantize models with commutative monodromy matrices, and progress is made in quantizing the non-commutative case. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720. RP BARDAKCI, K (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 34 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD JAN 27 PY 1992 VL 369 IS 1-2 BP 461 EP 477 DI 10.1016/0550-3213(92)90394-Q PG 17 WC Physics, Particles & Fields SC Physics GA HC504 UT WOS:A1992HC50400019 ER PT J AU CHANG, D KEPHART, TW KEUNG, WY YUAN, TC AF CHANG, D KEPHART, TW KEUNG, WY YUAN, TC TI CHROMOELECTRIC DIPOLE-MOMENTS OF HEAVY QUARKS AND PURELY GLUONIC CP VIOLATING OPERATORS SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGGS-BOSON-EXCHANGE; EXTERNAL FIELDS; STANDARD MODEL; GAUGE THEORY; NEUTRON; NONCONSERVATION; QCD; CONSTRAINTS; DIMENSION; SCALAR AB We study effects of induced CP nonconserving effective operators involving the gluon field strength as a result of integrating out the heavy quark field which carries a chromoelectric dipole moment. The induced gluonic operators of dimension 8 may be the dominant mechanism for generating the neutron electric dipole moment. C1 FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. VANDERBILT UNIV,DEPT PHYS & ASTRON,NASHVILLE,TN 37235. UNIV ILLINOIS,DEPT PHYS,CHICAGO,IL 60680. RP CHANG, D (reprint author), NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60208, USA. NR 33 TC 20 Z9 20 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 27 PY 1992 VL 68 IS 4 BP 439 EP 442 DI 10.1103/PhysRevLett.68.439 PG 4 WC Physics, Multidisciplinary SC Physics GA HB357 UT WOS:A1992HB35700006 ER PT J AU LITTENBERG, LS SHROCK, RE AF LITTENBERG, LS SHROCK, RE TI UPPER-BOUNDS ON LEPTON-NUMBER VIOLATING MESON DECAYS SO PHYSICAL REVIEW LETTERS LA English DT Article ID MASSIVE NEUTRINOS; BRANCHING RATIO; SEARCH; LIMITS; ADMIXTURES; MASSES; TESTS AB From a retroactive data analysis, we obtain the first upper bound on the \DELTA-L\ = 2 kaon decay K+ --> pi--mu+-mu+: B(K+ --> pi--mu+-mu+) < 1.5 x 10(-4). We also discuss K+ --> pi--mu+-e+ and \DELTA-L\ = 2 decays of D and B mesons. We suggest experiments which can improve our limit and discuss the connection with direct searches for heavy neutrinos in K(mu-2)+ decay. C1 SUNY STONY BROOK,INST THEORET PHYS,STONY BROOK,NY 11794. RP LITTENBERG, LS (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. OI Littenberg, Laurence/0000-0001-8373-7179 NR 32 TC 50 Z9 50 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 27 PY 1992 VL 68 IS 4 BP 443 EP 446 DI 10.1103/PhysRevLett.68.443 PG 4 WC Physics, Multidisciplinary SC Physics GA HB357 UT WOS:A1992HB35700007 ER PT J AU ABE, F AMIDEI, D APOLLINARI, G ATAC, M AUCHINCLOSS, P BADEN, AR BACCHETTA, N BAILEY, MW BAMBERGER, A BARNETT, BA BARBAROGALTIERI, A BARNES, VE BAUMANN, T BEDESCHI, F BEHRENDS, S BELFORTE, S BELLETTINI, G BELLINGER, J BENJAMIN, D BENSINGER, J BERETVAS, A BERGE, JP BERTOLUCCI, S BHADRA, S BINKLEY, M BLAIR, R BLOCKER, C BOLOGNESI, V BOOTH, AW BOSWELL, C BRANDENBURG, G BROWN, D BUCKLEYGEER, E BUDD, HS BUSETTO, G BYONWAGNER, A BYRUM, KL CAMPAGNARI, C CAMPBELL, M CANER, A CAREY, R CARITHERS, W CARLSMITH, D CARROLL, JT CASHMORE, R CASTRO, A CERVELLI, F CHADWICK, K CHIARELLI, G CHINOWSKY, W CIHANGIR, S CLARK, AG CONNOR, D CONTRERAS, M COOPER, J CORDELLI, M CRANE, D CURATOLO, M DAY, C DEJONGH, F DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DERWENT, PF DEVLIN, T DIBITONTO, D DICKSON, M DRUCKER, RB EINSWEILER, K ELIAS, JE ELY, R ENO, S ERREDE, S ESPOSITO, B FLAUGHER, B FOSTER, GW FRANKLIN, M FREEMAN, J FRISCH, H FUESS, T FUKUI, Y FUNAYAMA, Y GARFINKEL, AF GAUTHIER, A GEER, S GERDES, DW GIANNETTI, P GIOKARIS, N GIROMINI, P GLADNEY, L GOLD, M GOULIANOS, K GRASSMANN, H GROSSOPILCHER, C HABER, C HAHN, SR HANDLER, R HARA, K HARRIS, RM HAUSER, J HAWK, C HESSING, T HOLLEBEEK, R HOLLOWAY, L HU, P HUBBARD, B HUFFMAN, BT HUGHES, R HURST, P HUTH, J HYLEN, J INCAGLI, M INO, T ISO, H JENSEN, H JESSOP, CP JOHNSON, RP JOSHI, U KADEL, RW KAMON, T KANDA, S KARDELIS, DA KARLINER, I KEARNS, E KEEBLE, L KEPHART, R KESTEN, P KEUP, RM KEUTELIAN, H KIM, D KIM, S KIRSCH, L KONDO, K KONIGSBERG, J KOVACS, E KUHLMANN, SE KUNS, E LAASANEN, AT LAMOUREUX, JI LEONE, S LI, W LISS, TM LIMON, P LOCKYER, N LUCHINI, CB LUKENS, P MAAS, P MAESHIMA, K MANGANO, M MARRINER, JP MARIOTTI, M MARKELOFF, R MARKOSKY, LA MATTINGLY, R MCINTYRE, P MENZIONE, A MEYER, T MIKAMO, S MILLER, M MIMASHI, T MISCETTI, S MISHINA, M MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A NAKAE, LF NAKANO, I NELSON, C NEWMANHOLMES, C NG, JST NINOMIYA, M NODULMAN, L OGAWA, S PAOLETTI, R PARA, A PARE, E PARK, S PATRICK, J PHILLIPS, TJ PTOHOS, F PLUNKETT, R PONDROM, L PROUDFOOT, J PUNZI, G QUARRIE, D RAGAN, K REDLINGER, G RHOADES, J ROACH, M RIMONDI, F RISTORI, L ROHALY, T ROODMAN, A SAKUMOTO, WK SANSONI, A SARD, RD SAVOYNAVARRO, A SCARPINE, V SCHLABACH, P SCHMIDT, EE SCHNEIDER, O SCHUB, MH SCHWITTERS, R SCRIBANO, A SEGLER, S SEIYA, Y SEKIGUCHI, M SHAPIRO, M SHAW, NM SHEAFF, M SHOCHET, M SIEGRIST, J SINERVO, P SKARHA, J SLIWA, K SMITH, DA SNIDER, FD SONG, L SPAHN, M STDENIS, R STEFANINI, A SULLIVAN, G SWARTZ, RL TAKANO, M TARTARELLI, F TAKIKAWA, K TAREM, S THERIOT, D TIMKO, M TIPTON, P TKACZYK, S TOLLESTRUP, A TONNISON, J TRISCHUK, W TURINI, N TSAY, Y UKEGAWA, F UNDERWOOD, D VEJCIK, S VIDAL, R WAGNER, RG WAGNER, RL WAINER, N WALSH, J WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WHITE, SN WICKLUND, AB WILLIAMS, HH WINER, BL WYSS, J YAGIL, A YAMASHITA, A YASUOKA, K YEH, GP YOH, J YOKOYAMA, M YUN, JC ZANETTI, A ZETTI, F ZUCCHELLI, S AF ABE, F AMIDEI, D APOLLINARI, G ATAC, M AUCHINCLOSS, P BADEN, AR BACCHETTA, N BAILEY, MW BAMBERGER, A BARNETT, BA BARBAROGALTIERI, A BARNES, VE BAUMANN, T BEDESCHI, F BEHRENDS, S BELFORTE, S BELLETTINI, G BELLINGER, J BENJAMIN, D BENSINGER, J BERETVAS, A BERGE, JP BERTOLUCCI, S BHADRA, S BINKLEY, M BLAIR, R BLOCKER, C BOLOGNESI, V BOOTH, AW BOSWELL, C BRANDENBURG, G BROWN, D BUCKLEYGEER, E BUDD, HS BUSETTO, G BYONWAGNER, A BYRUM, KL CAMPAGNARI, C CAMPBELL, M CANER, A CAREY, R CARITHERS, W CARLSMITH, D CARROLL, JT CASHMORE, R CASTRO, A CERVELLI, F CHADWICK, K CHIARELLI, G CHINOWSKY, W CIHANGIR, S CLARK, AG CONNOR, D CONTRERAS, M COOPER, J CORDELLI, M CRANE, D CURATOLO, M DAY, C DEJONGH, F DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DERWENT, PF DEVLIN, T DIBITONTO, D DICKSON, M DRUCKER, RB EINSWEILER, K ELIAS, JE ELY, R ENO, S ERREDE, S ESPOSITO, B FLAUGHER, B FOSTER, GW FRANKLIN, M FREEMAN, J FRISCH, H FUESS, T FUKUI, Y FUNAYAMA, Y GARFINKEL, AF GAUTHIER, A GEER, S GERDES, DW GIANNETTI, P GIOKARIS, N GIROMINI, P GLADNEY, L GOLD, M GOULIANOS, K GRASSMANN, H GROSSOPILCHER, C HABER, C HAHN, SR HANDLER, R HARA, K HARRIS, RM HAUSER, J HAWK, C HESSING, T HOLLEBEEK, R HOLLOWAY, L HU, P HUBBARD, B HUFFMAN, BT HUGHES, R HURST, P HUTH, J HYLEN, J INCAGLI, M INO, T ISO, H JENSEN, H JESSOP, CP JOHNSON, RP JOSHI, U KADEL, RW KAMON, T KANDA, S KARDELIS, DA KARLINER, I KEARNS, E KEEBLE, L KEPHART, R KESTEN, P KEUP, RM KEUTELIAN, H KIM, D KIM, S KIRSCH, L KONDO, K KONIGSBERG, J KOVACS, E KUHLMANN, SE KUNS, E LAASANEN, AT LAMOUREUX, JI LEONE, S LI, W LISS, TM LIMON, P LOCKYER, N LUCHINI, CB LUKENS, P MAAS, P MAESHIMA, K MANGANO, M MARRINER, JP MARIOTTI, M MARKELOFF, R MARKOSKY, LA MATTINGLY, R MCINTYRE, P MENZIONE, A MEYER, T MIKAMO, S MILLER, M MIMASHI, T MISCETTI, S MISHINA, M MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A NAKAE, LF NAKANO, I NELSON, C NEWMANHOLMES, C NG, JST NINOMIYA, M NODULMAN, L OGAWA, S PAOLETTI, R PARA, A PARE, E PARK, S PATRICK, J PHILLIPS, TJ PTOHOS, F PLUNKETT, R PONDROM, L PROUDFOOT, J PUNZI, G QUARRIE, D RAGAN, K REDLINGER, G RHOADES, J ROACH, M RIMONDI, F RISTORI, L ROHALY, T ROODMAN, A SAKUMOTO, WK SANSONI, A SARD, RD SAVOYNAVARRO, A SCARPINE, V SCHLABACH, P SCHMIDT, EE SCHNEIDER, O SCHUB, MH SCHWITTERS, R SCRIBANO, A SEGLER, S SEIYA, Y SEKIGUCHI, M SHAPIRO, M SHAW, NM SHEAFF, M SHOCHET, M SIEGRIST, J SINERVO, P SKARHA, J SLIWA, K SMITH, DA SNIDER, FD SONG, L SPAHN, M STDENIS, R STEFANINI, A SULLIVAN, G SWARTZ, RL TAKANO, M TARTARELLI, F TAKIKAWA, K TAREM, S THERIOT, D TIMKO, M TIPTON, P TKACZYK, S TOLLESTRUP, A TONNISON, J TRISCHUK, W TURINI, N TSAY, Y UKEGAWA, F UNDERWOOD, D VEJCIK, S VIDAL, R WAGNER, RG WAGNER, RL WAINER, N WALSH, J WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WHITE, SN WICKLUND, AB WILLIAMS, HH WINER, BL WYSS, J YAGIL, A YAMASHITA, A YASUOKA, K YEH, GP YOH, J YOKOYAMA, M YUN, JC ZANETTI, A ZETTI, F ZUCCHELLI, S TI LOWER LIMIT ON THE TOP-QUARK MASS FROM EVENTS WITH 2 LEPTONS IN PPBAR COLLISIONS AT SQUARE-ROOT=1.8 TEV SO PHYSICAL REVIEW LETTERS LA English DT Article ID HEAVY QUARKS; VECTOR-BOSON; HADRONIC COLLISIONS; FERMILAB TEVATRON; NEUTRAL-CURRENT; STANDARD MODEL; SEARCH; WIDTH; Z0; COLLIDER AB We present results from searches for the top quark in ppBAR collisions at the Fermilab Tevatron Collider. The data sample was collected during 1988-89 with the Collider Detector at Fermilab and has an integrated luminosity of 4.1 pb-1. Our previous search for e-mu final states for ttBAR --> evb-mu-vbBAR decays has been extended to include the ee and mu-mu-channels. In addition, we have searched in each event with a high-transverse-momentum lepton accompanied by hadron jets for a low-transverse-momentum muon as a tag of a bottom quark in ttBAR --> lvbqqBARbBAR decays. A lower limit on the top-quark mass of 91 GeV/c2 is obtained at the 95% confidence level, assuming standard model decays. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. BRANDEIS UNIV,WALTHAM,MA 02254. UNIV CHICAGO,CHICAGO,IL 60637. FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. IST NAZL FIS NUCL,LAB NAZL FRASCATI,FRASCATI,ITALY. HARVARD UNIV,CAMBRIDGE,MA 02138. UNIV ILLINOIS,URBANA,IL 61801. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV PADUA,IST NAZL FIS NUCL,I-35131 PADUA,ITALY. UNIV PENN,PHILADELPHIA,PA 19104. UNIV PISA,IST NAZL FIS NUCL,I-56100 PISA,ITALY. SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV ROCHESTER,ROCHESTER,NY 14627. ROCKEFELLER UNIV,NEW YORK,NY 10021. RUTGERS STATE UNIV,PISCATAWAY,NJ 08854. TEXAS A&M UNIV SYST,COLLEGE STN,TX 77843. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53706. RP ABE, F (reprint author), NATL LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN. RI St.Denis, Richard/C-8997-2012; Chiarelli, Giorgio/E-8953-2012; Punzi, Giovanni/J-4947-2012 OI Chiarelli, Giorgio/0000-0001-9851-4816; Punzi, Giovanni/0000-0002-8346-9052 NR 38 TC 128 Z9 128 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 27 PY 1992 VL 68 IS 4 BP 447 EP 451 DI 10.1103/PhysRevLett.68.447 PG 5 WC Physics, Multidisciplinary SC Physics GA HB357 UT WOS:A1992HB35700008 ER PT J AU STRAUB, PB JAFFE, DE GLASS, HD ADAMS, MR BROWN, CN CHARPAK, G COOPER, WE CRITTENDEN, JA FINLEY, DA GRAY, R HEMMI, Y HSIUNG, YB HUBBARD, JR JONCKHEERE, AM JOSTLEIN, H KAPLAN, DM LEDERMAN, LM LUK, KB MAKI, A MANGEOT, P MCCARTHY, RL MIYAKE, K PLAAG, RE RUTHERFOORD, JP SAKAI, Y SANTIARD, JC SAULI, F SMITH, SR YOSHIDA, T YOUNG, KK AF STRAUB, PB JAFFE, DE GLASS, HD ADAMS, MR BROWN, CN CHARPAK, G COOPER, WE CRITTENDEN, JA FINLEY, DA GRAY, R HEMMI, Y HSIUNG, YB HUBBARD, JR JONCKHEERE, AM JOSTLEIN, H KAPLAN, DM LEDERMAN, LM LUK, KB MAKI, A MANGEOT, P MCCARTHY, RL MIYAKE, K PLAAG, RE RUTHERFOORD, JP SAKAI, Y SANTIARD, JC SAULI, F SMITH, SR YOSHIDA, T YOUNG, KK TI NUCLEAR-DEPENDENCE OF HIGH-XT HADRON AND HIGH-TAU HADRON-PAIR PRODUCTION IN P-A INTERACTIONS AT SQUARE-ROOT-S=38.8 GEV SO PHYSICAL REVIEW LETTERS LA English DT Article ID LARGE-TRANSVERSE-MOMENTUM; IMAGING CHERENKOV COUNTER; INELASTIC MUON SCATTERING; PRODUCTION CROSS-SECTIONS; S = 27.4; INCLUSIVE PRODUCTION; DIQUARK SCATTERING; IRON TARGETS; COLLISIONS; DEUTERIUM AB We present a high-statistics, species-identified measurement of the W-to-Be per-nucleon cross-section ratio, R(W/Be), for high-x(t) hadrons and high-tau h+h- pairs produced in p-A collisions at square-root s = 38.8 GeV. The data extend to 0.62 in x(t) and 0.39 in square-root-tau. For single hadrons, R(W/Be) peaks at p(t) almost-equal-to 5 GeV/c and decreases to almost-equal-to 1 for mesons with p(t) > 8 GeV/c. At fixed p(t), R(W/Be) falls with square-root s. For symmetric pairs With square-root-tau > 0.28, R(W/Be) = 0.84 +/- 0.02 +/- 0.07, suggesting a nuclear suppression of high-z fragmentation. R(W/Be) increases with p(out), indicative of constituent multiple scattering. C1 CENS,F-91190 GIF SUR YVETTE,FRANCE. CERN,CH-1211 GENEVA 23,SWITZERLAND. COLUMBIA UNIV,NEW YORK,NY 10027. FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. FLORIDA STATE UNIV,TALLAHASSEE,FL 32306. NATL LAB HIGH ENERGY PHYS,KEK,TSUKUBA,IBARAKI 305,JAPAN. KYOTO UNIV,KYOTO 606,JAPAN. SUNY STONY BROOK,STONY BROOK,NY 11794. RP STRAUB, PB (reprint author), UNIV WASHINGTON,SEATTLE,WA 98195, USA. NR 25 TC 66 Z9 66 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 27 PY 1992 VL 68 IS 4 BP 452 EP 455 DI 10.1103/PhysRevLett.68.452 PG 4 WC Physics, Multidisciplinary SC Physics GA HB357 UT WOS:A1992HB35700009 ER PT J AU LAFONTAINE, B VILLENEUVE, DM BALDIS, HA DRAKE, RP ESTABROOK, K AF LAFONTAINE, B VILLENEUVE, DM BALDIS, HA DRAKE, RP ESTABROOK, K TI TEST OF THE LANDAU CUTOFF OF STIMULATED RAMAN-SCATTERING SPECTRA AS AN ELECTRON-TEMPERATURE DIAGNOSTIC IN LASER-PRODUCED PLASMAS SO PHYSICAL REVIEW LETTERS LA English DT Article ID INSTABILITY; WAVES AB The inference of the electron temperature T(e) from the Landau cutoff of backscattered Raman spectra is tested by simultaneous Thomson scattering temperature measurements and compared with results of two-dimensional hydrodynamic computer simulations. If the threshold condition is calculated by using a detailed modeling of the instability, then all three indications of T(e) agree. In contrast, the often-used estimate of k-lambda(De) congruent-to 0.3 for sizable damping typically overestimates the electron temperature by a factor of 1.5 to 2 in this case. C1 UNIV CALIF DAVIS,LIVERMORE,CA 94551. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP LAFONTAINE, B (reprint author), INST NATL RECH SCI ENERGIE VARENNES,CP 1020,VARENNES J3X 1S2,QUEBEC,CANADA. RI Villeneuve, David/I-4140-2012; Drake, R Paul/I-9218-2012 OI Villeneuve, David/0000-0002-2810-3648; Drake, R Paul/0000-0002-5450-9844 NR 14 TC 15 Z9 15 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 27 PY 1992 VL 68 IS 4 BP 484 EP 487 DI 10.1103/PhysRevLett.68.484 PG 4 WC Physics, Multidisciplinary SC Physics GA HB357 UT WOS:A1992HB35700017 ER PT J AU HONG, HW ABURANO, RD LIN, DS CHEN, HD CHIANG, TC ZSCHACK, P SPECHT, ED AF HONG, HW ABURANO, RD LIN, DS CHEN, HD CHIANG, TC ZSCHACK, P SPECHT, ED TI X-RAY-SCATTERING STUDY OF AG/SI(111) BURIED INTERFACE STRUCTURES SO PHYSICAL REVIEW LETTERS LA English DT Article ID SURFACE; SI(111); AG; DIFFRACTION; FILMS AB Various interface structures formed between Si(111) and a thick Ag overlayer are investigated by grazing-incidence x-ray diffraction. The (7 x 7) reconstruction of Si(111) is preserved under a room-temperature deposited Ag film. Upon annealing to 250-degrees-C the interface becomes (1 x 1). This is contrasted by the (square-root 3 x square-root 3)R30-degrees structure formed by annealing a thin Ag film on Si(111). By depositing a thick Ag film on this (square-root 3 x square-root 3)R30-degrees Ag/Si(111) surface at room temperature, the (square-root 3 x square-root 3)R30-degrees reconstruction is suppressed. C1 UNIV ILLINOIS,DEPT MAT SCI & ENGN,URBANA,IL 61801. UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801. OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RP HONG, HW (reprint author), UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801, USA. RI Chiang, Tai/H-5528-2011; Specht, Eliot/A-5654-2009; Lin, Dengsung/A-4127-2009 OI Specht, Eliot/0000-0002-3191-2163; NR 15 TC 47 Z9 47 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 27 PY 1992 VL 68 IS 4 BP 507 EP 510 DI 10.1103/PhysRevLett.68.507 PG 4 WC Physics, Multidisciplinary SC Physics GA HB357 UT WOS:A1992HB35700023 ER PT J AU XIANG, XD VAREKA, WA ZETTL, A CORKILL, JL COHEN, ML KIJIMA, N GRONSKY, R AF XIANG, XD VAREKA, WA ZETTL, A CORKILL, JL COHEN, ML KIJIMA, N GRONSKY, R TI METALLIZATION OF THE RESISTIVITY TENSOR IN BI2SR2CACU2OX THROUGH EPITAXIAL INTERCALATION SO PHYSICAL REVIEW LETTERS LA English DT Article ID VALENCE-BOND STATE; SUPERCONDUCTIVITY; TRANSPORT AB We have used iodine intercalation to alter the interplane interaction and the anisotropic resistivity tensor of the oxide superconductor Bi2Sr2CaCu2Ox. Real-space transmission electron microscopy images confirm that iodine is epitaxially intercalated between the Bi-O bilayers. In the normal state above T(c), the metallic CuO2 plane sheet resistance is unaffected by intercalation, while the out-of-plane conduction is dramatically changed from semiconductorlike to metalliclike. This result is inconsistent with some of the theoretical predictions based on holon-spinon scattering. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,NATL CTR ELECTRON MICROSCOPY,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. RP XIANG, XD (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. RI Xiang, Xiaodong/A-9445-2012; Zettl, Alex/O-4925-2016; Xiang, Xiaodong/A-5936-2017 OI Zettl, Alex/0000-0001-6330-136X; NR 14 TC 111 Z9 112 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 27 PY 1992 VL 68 IS 4 BP 530 EP 533 DI 10.1103/PhysRevLett.68.530 PG 4 WC Physics, Multidisciplinary SC Physics GA HB357 UT WOS:A1992HB35700029 ER PT J AU FOWLER, CM FREEMAN, BL HULTS, WL KING, JC MUELLER, FM SMITH, JL AF FOWLER, CM FREEMAN, BL HULTS, WL KING, JC MUELLER, FM SMITH, JL TI DEHAAS-VANALPHEN EFFECT AND FERMI-SURFACE OF YBA2CU3O6.97 SO PHYSICAL REVIEW LETTERS LA English DT Article AB The component of the magnetic susceptibility periodic in 1/B, the de Haas-van Alphen effect, has been investigated using a 100-T flux compression system. It is concluded from these measurements that YBa2Cu3O6.97 exhibits a Fermi surface with at least three separate extremal frequencies for the c axis parallel to the applied field. Orbital masses, renormalization-lambda's, and scattering rates are estimated from an amplitude analysis. RP FOWLER, CM (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. NR 22 TC 113 Z9 113 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 27 PY 1992 VL 68 IS 4 BP 534 EP 537 DI 10.1103/PhysRevLett.68.534 PG 4 WC Physics, Multidisciplinary SC Physics GA HB357 UT WOS:A1992HB35700030 ER PT J AU STRONGIN, M MILLER, DL AF STRONGIN, M MILLER, DL TI EVIDENCE FOR SUPERCONDUCTIVITY IN LOW-TEMPERATURE GROWN GAAS - COMMENT SO PHYSICAL REVIEW LETTERS LA English DT Letter C1 PENN STATE UNIV,DEPT ELECT & COMP ENGN,CTR ELECTR MAT & PROC,UNIV PK,PA 16802. RP STRONGIN, M (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. RI Liliental-Weber, Zuzanna/H-8006-2012 NR 7 TC 2 Z9 2 U1 2 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 27 PY 1992 VL 68 IS 4 BP 550 EP 550 DI 10.1103/PhysRevLett.68.550 PG 1 WC Physics, Multidisciplinary SC Physics GA HB357 UT WOS:A1992HB35700037 ER PT J AU BARANOWSKI, JM LILIENTALWEBER, Z YAU, WF WEBER, ER AF BARANOWSKI, JM LILIENTALWEBER, Z YAU, WF WEBER, ER TI EVIDENCE FOR SUPERCONDUCTIVITY IN LOW-TEMPERATURE-GROWN GAAS - REPLY SO PHYSICAL REVIEW LETTERS LA English DT Letter C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV WARSAW,DIV MAT SCI,PL-00681 WARSAW,POLAND. RP BARANOWSKI, JM (reprint author), UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720, USA. NR 5 TC 4 Z9 4 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 27 PY 1992 VL 68 IS 4 BP 551 EP 551 DI 10.1103/PhysRevLett.68.551 PG 1 WC Physics, Multidisciplinary SC Physics GA HB357 UT WOS:A1992HB35700038 ER PT J AU YANG, YB HARRISON, K CARR, D GUIOCHON, G AF YANG, YB HARRISON, K CARR, D GUIOCHON, G TI FACTORS AFFECTING THE SEPARATION AND LOADING CAPACITY OF PROTEINS IN PREPARATIVE GRADIENT ELUTION HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY SO JOURNAL OF CHROMATOGRAPHY LA English DT Article; Proceedings Paper CT 8TH INTERNATIONAL SYMP ON PREPARATIVE CHROMATOGRAPHY ( PREP 91 ) CY MAY 13-15, 1991 CL ARLINGTON, VA SP WASHINGTON CHROMATOG DISCUSS GRP ID OPTIMIZATION; PHASE; BAND; SIZE AB The optimum conditions for the purification of proteins by gradient elution in reversed-phase liquid chromatography were studied, with emphasis on the column length. Because of the strong dependence of the retention of proteins on the mobile phase composition, very short columns can be used successfully to perform analytical separations. A similar conclusion is extended to preparative separations. Columns with different lengths and diameters were used. The dependence of the loading capacity for touching band separation on the column length, diameter and volume was studied, in addition to the regeneration time between successive runs, the starting mobile phase composition and the necessary column efficiency. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. VYDAC SEPARAT GRP,HESPERIA,CA 92345. OAK RIDGE NATL LAB,DIV ANALYT CHEM,OAK RIDGE,TN 37830. NR 25 TC 9 Z9 9 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR PD JAN 24 PY 1992 VL 590 IS 1 BP 35 EP 47 DI 10.1016/0021-9673(92)87004-R PG 13 WC Chemistry, Analytical SC Chemistry GA HB737 UT WOS:A1992HB73700004 PM 1318319 ER PT J AU JACOBSON, SC GUIOCHON, G AF JACOBSON, SC GUIOCHON, G TI EXPERIMENTAL-STUDY OF THE PRODUCTION-RATE OF PURE ENANTIOMERS FROM RACEMIC MIXTURES SO JOURNAL OF CHROMATOGRAPHY LA English DT Article; Proceedings Paper CT 8TH INTERNATIONAL SYMP ON PREPARATIVE CHROMATOGRAPHY ( PREP 91 ) CY MAY 13-15, 1991 CL ARLINGTON, VA SP WASHINGTON CHROMATOG DISCUSS GRP ID PREPARATIVE LIQUID-CHROMATOGRAPHY; BAND PROFILES; ELUTION CHROMATOGRAPHY; COMPUTER-SIMULATION; IDEAL MODEL; OPTIMIZATION; SEPARATION; BINARY; ALBUMIN; PROPAGATION AB Elution band profiles were determined experimentally for the racemic mixture Of D- and L-mandelic acid on a bovine serum albumin chemically bonded phase. The results show significantly different profiles for a given amount of either isomer, whether pure or in the racemic mixture. The production rate at 99% purity is more than one order of magnitude higher under overlapping band than under touching band conditions. In the former instance, the recovery yield and production rate are always higher for the less retained enantiomer. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV ANALYT CHEM,OAK RIDGE,TN 37831. NR 33 TC 15 Z9 15 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR PD JAN 24 PY 1992 VL 590 IS 1 BP 119 EP 126 DI 10.1016/0021-9673(92)87012-W PG 8 WC Chemistry, Analytical SC Chemistry GA HB737 UT WOS:A1992HB73700012 ER PT J AU GOODMAN, MM KABALKA, GW MARKS, RC KNAPP, FF LEE, J LIANG, Y AF GOODMAN, MM KABALKA, GW MARKS, RC KNAPP, FF LEE, J LIANG, Y TI SYNTHESIS AND EVALUATION OF RADIOIODINATED 2-(2(RS)-AMINOPROPYL)-5-IODOTHIOPHENES AS BRAIN IMAGING AGENTS SO JOURNAL OF MEDICINAL CHEMISTRY LA English DT Article ID ISOPROPYL-IODOAMPHETAMINE; DYNAMIC SPECT; FATTY-ACIDS; I-123 IMP; NITROALKENES; MENINGIOMAS; ALKYLAMINES; REDUCTION; AMINES; ROUTE AB Methods have been developed for the preparation of 2-(2(RS)-aminopropyl)-5-iodothiophenes. The syntheses and physical properties of 2-(2(RS)-aminopropyl)-5-iodothiophene and N-isopropyl-2-(2(RS)-aminopropyl)-5-iodothiophene are described. The radioiodinated agents are of interest because of the high expected uptake and prolonged brain retention that may result from binding to high-capacity, relatively nonspecific amine binding sites. Radioiodine was introduced into the 5-position of 2-(2(RS)-aminopropyl)-5-iodothiophene and N-isopropyl-2-(2(RS)-aminopropyl)-5-iodothiophene by radioiodination of the corresponding 5-boronic acid or 5-(trimethylstannyl) derivatives. Tissue distribution studies in rats with 2-(2(RS)-aminopropyl)-5-[I-126]iodothiophene showed high brain uptake (5 min. 2.77% dose/g 30 min, 2.51% dose/g) and good brain/blood (B/B) ratios (5 min, 6/1; 30 min 3.8/1. A comparison of the brain uptake of the N-isopropyl derivative with the 2(RS)-aminopropyl analogue demonstrated higher initial brain uptake and brain to blood ratios (5 min, 3.2% dose/g; 10.3/1) but more rapid washout (30 min, 1.37% dose; 2.8/1). These data suggest that radiolabeled 2-(2(RS)-aminopropyl)-5-iodothiophenes are potentially useful agents for cerebral perfusion imaging by single-photon-emission computerized tomography (SPECT). C1 UNIV TENNESSEE,MED CTR,CTR BIOMED IMAGING,DEPT RADIOL,1924 ALCOA HIGHWAY,KNOXVILLE,TN 37920. UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37920. OAK RIDGE NATL LAB,NUCL MED GRP,OAK RIDGE,TN 37831. FU NIGMS NIH HHS [GM-39081] NR 26 TC 8 Z9 8 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-2623 J9 J MED CHEM JI J. Med. Chem. PD JAN 24 PY 1992 VL 35 IS 2 BP 280 EP 285 DI 10.1021/jm00080a012 PG 6 WC Chemistry, Medicinal SC Pharmacology & Pharmacy GA HB382 UT WOS:A1992HB38200012 PM 1732544 ER PT J AU CHARLSON, RJ SCHWARTZ, SE HALES, JM CESS, RD COAKLEY, JA HANSEN, JE HOFMANN, DJ AF CHARLSON, RJ SCHWARTZ, SE HALES, JM CESS, RD COAKLEY, JA HANSEN, JE HOFMANN, DJ TI CLIMATE FORCING BY ANTHROPOGENIC AEROSOLS SO SCIENCE LA English DT Article ID GLOBAL CLOUD ALBEDO; SOUTH-AMERICAN CONTINENT; EARTHS RADIATION BUDGET; ICE-CORE RECORD; ATMOSPHERIC SULFUR; UNITED-STATES; ANTARCTIC PRECIPITATION; MARINE-PHYTOPLANKTON; IMPURITY SOURCES; WATER CLOUDS AB Although long considered to be of marginal importance to global climate change, tropospheric aerosol contributes substantially to radiative forcing, and anthropogenic sulfate aerosol in particular has imposed a major perturbation to this forcing. Both the direct scattering of short-wavelength solar radiation and the modification of the shortwave reflective properties of clouds by sulfate aerosol particles increase planetary albedo, thereby exerting a cooling influence on the planet. Current climate forcing due to anthropogenic sulfate is estimated to be - 1 to - 2 watts per square meter, globally averaged. This perturbation is comparable in magnitude to current anthropogenic greenhouse gas forcing but opposite in sign. Thus, the aerosol forcing has likely offset global greenhouse warming to a substantial degree. However, differences in geographical and seasonal distributions of these forcings preclude any simple compensation. Aerosol effects must be taken into account in evaluating anthropogenic influences on past, current, and projected future climate and in formulating policy regarding controls on emission of greenhouse gases and sulfur dioxide. Resolution of such policy issues requires integrated research on the magnitude and geographical distribution of aerosol climate forcing and on the controlling chemical and physical processes. C1 UNIV WASHINGTON, INST ENVIRONM STUDIES, SEATTLE, WA 98195 USA. BROOKHAVEN NATL LAB, DIV ENVIRONM CHEM, UPTON, NY 11973 USA. PACIFIC NW LAB, DEPT ATMOSPHER SCI, RICHLAND, WA 99352 USA. SUNY STONY BROOK, INST TERR & PLANETARY ATMOSPHERES, STONY BROOK, NY 11794 USA. OREGON STATE UNIV, DEPT ATMOSPHER SCI, CORVALLIS, OR 97331 USA. NASA, GODDARD INST SPACE STUDIES, NEW YORK, NY 10025 USA. NOAA, CLIMATE MONITORING & DIAGNOST LAB, BOULDER, CO 80303 USA. RP CHARLSON, RJ (reprint author), UNIV WASHINGTON, DEPT ATMOSPHER SCI, SEATTLE, WA 98195 USA. RI Schwartz, Stephen/C-2729-2008 OI Schwartz, Stephen/0000-0001-6288-310X NR 83 TC 2116 Z9 2206 U1 102 U2 662 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD JAN 24 PY 1992 VL 255 IS 5043 BP 423 EP 430 DI 10.1126/science.255.5043.423 PG 8 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HA590 UT WOS:A1992HA59000029 PM 17842894 ER PT J AU GREENBAUM, E AF GREENBAUM, E TI KINETIC-STUDIES OF INTERFACIAL PHOTOCURRENTS IN PLATINIZED CHLOROPLASTS SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Letter ID PHOTOSYNTHETIC HYDROGEN; TURNOVER TIMES; POOL AB A photobioelectrochemical cell was constructed using platinized chloroplasts entrapped on a fiberglass filter pad as the photosensitive material. In this two-electrode device, a platinum gauze electrode made pressure contact with the chloroplasts, and a silver/silver chloride electrode made pressure contact with the electrolyte-impregnated filter paper pad. Upon illumination, an oriented photocurrent was observed that is consistent with the vectorial photochemical model of the reaction centers in photosynthetic membranes. The kinetics of interfacial photoelectron transfer in this cell were studied using the technique of repetitive flash illumination. By driving the photocurrent response into steady state, using multiple flash frequencies and normalizing the photoresponse to the rate of flashing, the frequency response of the photocurrent was determined. As expected, in the low-frequency, linear region, the normalized photocurrent response was constant. However, as the rate of flashing increased (above 100 Hz), the yield of photocurrent per frequency interval decreased. This decrease in yield was interpreted as the inability of the thermally activated electron transport chain of photosynthesis to keep pace with the higher rates of reaction center excitation. The reciprocal of the frequency at which the normalized photocurrent has fallen to one-half is called the turnover time. In these experiments this occurred at approximately 200 Hz, corresponding to a turnover time of 4 ms. RP GREENBAUM, E (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831, USA. NR 11 TC 9 Z9 9 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD JAN 23 PY 1992 VL 96 IS 2 BP 514 EP 516 DI 10.1021/j100181a004 PG 3 WC Chemistry, Physical SC Chemistry GA HB392 UT WOS:A1992HB39200004 ER PT J AU STEPHENS, PW COX, D LAUHER, JW MIHALY, L WILEY, JB ALLEMAND, PM HIRSCH, A HOLCZER, K LI, Q THOMPSON, JD WUDL, F AF STEPHENS, PW COX, D LAUHER, JW MIHALY, L WILEY, JB ALLEMAND, PM HIRSCH, A HOLCZER, K LI, Q THOMPSON, JD WUDL, F TI LATTICE STRUCTURE OF THE FULLERENE FERROMAGNET TDAE-C-60 SO NATURE LA English DT Article ID CARBON AB IN the brief time since the development of techniques for the purification of condensed phases of C60 (refs 1, 2), compounds of C60 have been synthesized that exhibit the important solid-state properties of superconductivity 3,4 and ferromagnetism 5. The fact that the C60 molecule participates in these two disparate effects is in itself striking; furthermore, the C60-based material has the highest T(c) of any molecular organic ferromagnet 6. An understanding of the physical origin of this ferromagnetism is sure to require a knowledge of the crystal structure. Here we report on an X-ray diffraction study of the ferromagnet TDAE-C60, where TDAE is tetrakis(dimethylamino)ethylene, C2N4(CH3)8. We find that the composition is stoichiometric with 1:1 ratio of TDAE to C60. The structure has a c-centred monoclinic unit cell suggestive of an anisotropic, low-dimensional band structure. Any theory for the ferromagnetic behaviour will have to take this anisotropy into account. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. SUNY STONY BROOK,DEPT CHEM,STONY BROOK,NY 11794. UNIV CALIF LOS ANGELES,DEPT CHEM & BIOCHEM,LOS ANGELES,CA 90024. UNIV CALIF SANTA BARBARA,INST POLYMERS & ORGAN SOLIDS,SANTA BARBARA,CA 93106. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024. UNIV CALIF LOS ANGELES,CTR SOLID STATE SCI,LOS ANGELES,CA 90024. UNIV CALIF SANTA BARBARA,DEPT CHEM,SANTA BARBARA,CA 93106. UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106. RP STEPHENS, PW (reprint author), SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794, USA. NR 15 TC 281 Z9 282 U1 1 U2 23 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD JAN 23 PY 1992 VL 355 IS 6358 BP 331 EP 332 DI 10.1038/355331a0 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HA591 UT WOS:A1992HA59100059 ER PT J AU ADEVA, B ADRIANI, O AGUILARBENITEZ, M AKBARI, H ALCARAZ, J ALOISIO, A ALVERSON, G ALVIGGI, MG AMBROSI, G AN, Q ANDERHUB, H ANDERSON, AL ANDREEV, VP ANGELOV, T ANTONOV, L ANTREASYAN, D ARCE, P AREFIEV, A ATAMANCHUK, A AZEMOON, T AZIZ, T BABA, PVKS BAGNAIA, P BAKKEN, JA BAKSAY, L BALL, RC BANERJEE, S BAO, J BARILLERE, R BARONE, L BATTISTON, R BAY, A BECATTINI, F BECKER, U BEHNER, F BEHRENS, J BEINGESSNER, S BENCZE, GL BERDUGO, J BERGES, P BERTUCCI, B BETEV, BL BIASINI, M BILAND, A BILEI, GM BIZZARRI, R BLAISING, JJ BLOMEKE, P BLUMENFELD, B BOBBINK, GJ BOCCIOLINI, M BOCK, R BOHM, A BORGIA, B BOURILKOV, D BOURQUIN, M BOUTIGNY, D BOUWENS, B BRAMBILLA, E BRANSON, JG BROCK, IC BROOKS, M BRUYANT, F BUISSON, C BUJAK, A BURGER, JD BURGER, WJ BURQ, JP BUSENITZ, J CAI, XD CAPELL, M CARIA, M CARMINATI, F CARTACCI, AM CERRADA, M CESARONI, F CHANG, YH CHATURVEDI, UK CHEMARIN, M CHEN, A CHEN, C CHEN, GM CHEN, HF CHEN, HS CHEN, J CHEN, M CHEN, ML CHEN, WY CHIEFARI, G CHIEN, CY CHMEISSANI, M CIVININI, C CLARE, I CLARE, R COAN, TE COHN, HO COIGNET, G COLINO, N CONTIN, A CRIJNS, F CUI, XY DAI, TS DALESSANDRO, R DEASMUNDIS, R DEGRE, A DEITERS, K DENES, E DENES, P DENOTARISTEFANI, F DHINA, M DIBITONTO, D DIEMOZ, M DIMITROV, HR DIONISI, C DOVA, MT DRAGO, E DRIEVER, T DUCHESNEAU, D DUINKER, P DURAN, I ELMAMOUNI, H ENGLER, A EPPLING, FJ ERNE, FC EXTERMANN, P FABBRETTI, R FABRE, M FALCIANO, S FAN, Q FAN, SJ FACKLER, O FAY, J FELCINI, M FERGUSON, T FERNANDEZ, D FERNANDEZ, G FERRONI, F FESEFELDT, H FIANDRINI, E FIELD, J FILTHAUT, F FINOCCHIARO, G FISHER, PH FORCONI, G FOREMAN, T FREUDENREICH, K FRIEBEL, W FUKUSHIMA, M GAILLOUD, M GALAKTIONOV, Y GALLO, E GANGULI, SN GARCIAABIA, P GAU, SS GELE, D GENTILE, S GOLDFARB, S GONG, ZF GONZALEZ, E GORDEEV, A GOTTLICHER, P GOUJON, D GRATTA, G GRINNELL, C GRUENEWALD, M GUANZIROLI, M GUO, JK GURTU, A GUSTAFSON, HR GUTAY, LJ HANGARTER, K HASAN, A HAUSCHILDT, D HE, CF HEBBEKER, T HEBERT, M HERTEN, G HERTEN, U HERVE, A HILGERS, K HOFER, H HOORANI, H HU, G HU, GQ ILLE, B ILYAS, MM INNOCENTE, V JANSSEN, H JEZEQUEL, S JIN, BN JONES, LW KASSER, A KHAN, RA KAMYSHKOV, Y KAPINOS, P KAPUSTINSKY, JS KARYOTAKIS, Y KAUR, M KHOKHAR, S KIENZLEFOCACCI, MN KINNISON, WW KIRKBY, D KIRSCH, S KITTEL, W KLIMENTOV, A KONIG, AC KORNADT, O KOUTSENKO, V KOULBARDIS, A KRAEMER, RW KRAMER, T KRASTEV, VR KRENZ, W KRIVSHICH, A KRIZMANIC, J KUMAR, KS KUMAR, V KUNIN, A LANDI, G LANIUS, K LANSKE, D LANZANO, S LEBRUN, P LECOMTE, P LECOQ, P LECOULTRE, P LEE, DM LEEDOM, I LEGOFF, JM LEISTAM, L LEISTE, R LENTI, M LEONARDI, E LETTRY, J LEYTENS, X LI, C LI, HT LI, JF LI, PJ LI, Q LI, XG LIAO, JY LIN, WT LIN, ZY LINDE, FL LINDEMANN, B LINNHOFER, D LIU, R LIU, Y LOHMANN, W LONGO, E LU, YS LUBBERS, JM LUBELSMEYER, K LUCI, C LUCKEY, D LUDOVICI, L LUMINARI, L MA, WG MACDERMOTT, M MALHOTRA, PK MALIK, R MALININ, A MANA, C MAO, DN MAO, YF MAOLINBAY, M MARCHESINI, P MARTIN, JP MARTINEZLASO, L MARZANO, F MASSARO, GGG MATSUDA, T MAZUMDAR, K MCBRIDE, P MCMAHON, T MCNALLY, D MEINHOLZ, T MERK, M MEROLA, L MESCHINI, M METZGER, WJ MI, Y MILLS, GB MIR, Y MIRABELLI, G MNICH, J MOLLER, M MONTELEONI, B MORAND, R MORGANTI, S MOULAI, NE MOUNT, R MULLER, S NADTOCHY, A NAGY, E NAPOLITANO, M NEWMAN, H NEYER, C NIAZ, MA NIESSEN, L NOWAK, H ORGANTINI, G PANDOULAS, D PAULUZZI, M PAUSS, F PASSALEVA, G PAOLETTI, S PATRICELLI, S PEI, YJ PERRETGALLIX, D PERRIER, J PEVSNER, A PIERI, M PIROUE, PA PLASIL, F PLYASKIN, V POHL, M POJIDAEV, V PRODUIT, N QIAN, JM QURESHI, KN RAGHAVAN, R RAHALCALLOT, G RAVEN, G RAZIS, P READ, K REN, D REN, Z RESCIGNO, M REUCROFT, S RICKER, A RIEMANN, S RIND, O RIZVI, HA ROE, BP ROHNER, M ROHNER, S ROMERO, L ROSE, J ROSIERLEES, S ROSMALEN, R ROSSELET, P RUBBIA, A RUBIO, JA RYKACZEWSKI, H SACHWITZ, M SALICIO, J SALICIO, JM SANDERS, GS SANTOCCHIA, A SARAKINOS, MS SARTORELLI, G SAUVAGE, G SAVIN, A SCHEGELSKY, V SCHMIEMANN, K SCHMITZ, D SCHMITZ, P SCHNEEGANS, M SCHOPPER, H SCHOTANUS, DJ SHOTKIN, S SCHREIBER, HJ SHUKLA, J SCHULTE, R SCHULTE, S SCHULTZE, K SCHUTTE, J SCHWENKE, J SCHWERING, G SCIACCA, C SCOTT, I SEHGAL, R SEILER, PG SENS, JC SERVOLI, L SHEER, I SHEN, DZ SHEVCHENKO, S SHI, XR SHMAKOV, K SHUMILOV, E SHOUTKO, V SODERSTROM, E SOPCZAK, A SPARTIOTIS, C SPICKERMANN, T SPILLANTINI, P STAROSTA, R STEUER, M STICKLAND, DP STICOZZI, F STONE, H STRAUCH, K STRINGFELLOW, BC SUDHAKAR, K SULTANOV, G SUMNER, RL SUN, LZ SUTER, H SUTTON, RB SWAIN, JD SYED, AA TANG, XW TARKOVSKY, E TAYLOR, L TIMMERMANS, C TING, SCC TING, SM TONUTTI, M TONWAR, SC TOTH, J TSAREGORODTSEV, A TSIPOLITIS, G TULLY, C TUNG, KL ULBRICHT, J URBAN, L UWER, U VALENTE, E VANDEWALLE, RT VETLITSKY, I VIERTEL, G VIKAS, P VIKAS, U VIVARGENT, M VOGEL, H VOGT, H VONDARDEL, G VOROBIEV, I VOROBYOV, AA VUILLEUMIER, L WADHWA, M WALLRAFF, W WANG, CR WANG, GH WANG, JH WANG, QF WANG, XL WANG, YF WANG, Z WANG, ZM WEBER, A WEBER, J WEILL, R WENAUS, TJ WENNINGER, J WHITE, M WILLMOTT, C WITTGENSTEIN, F WRIGHT, D WU, RJ WU, SL WU, SX WU, YG WYSLOUCH, B XIE, YY XU, YD XU, ZZ XUE, ZL YAN, DS YAN, XJ YANG, BZ YANG, CG YANG, G YANG, KS YANG, QY YANG, ZQ YE, CH YE, JB YE, Q YEH, SC YIN, ZW YOU, JM YZERMAN, M ZACCARDELLI, C ZEMP, P ZENG, M ZENG, Y ZHANG, DH ZHANG, ZP ZHOU, JF ZHU, RY ZHUANG, HL ZICHICHI, A AF ADEVA, B ADRIANI, O AGUILARBENITEZ, M AKBARI, H ALCARAZ, J ALOISIO, A ALVERSON, G ALVIGGI, MG AMBROSI, G AN, Q ANDERHUB, H ANDERSON, AL ANDREEV, VP ANGELOV, T ANTONOV, L ANTREASYAN, D ARCE, P AREFIEV, A ATAMANCHUK, A AZEMOON, T AZIZ, T BABA, PVKS BAGNAIA, P BAKKEN, JA BAKSAY, L BALL, RC BANERJEE, S BAO, J BARILLERE, R BARONE, L BATTISTON, R BAY, A BECATTINI, F BECKER, U BEHNER, F BEHRENS, J BEINGESSNER, S BENCZE, GL BERDUGO, J BERGES, P BERTUCCI, B BETEV, BL BIASINI, M BILAND, A BILEI, GM BIZZARRI, R BLAISING, JJ BLOMEKE, P BLUMENFELD, B BOBBINK, GJ BOCCIOLINI, M BOCK, R BOHM, A BORGIA, B BOURILKOV, D BOURQUIN, M BOUTIGNY, D BOUWENS, B BRAMBILLA, E BRANSON, JG BROCK, IC BROOKS, M BRUYANT, F BUISSON, C BUJAK, A BURGER, JD BURGER, WJ BURQ, JP BUSENITZ, J CAI, XD CAPELL, M CARIA, M CARMINATI, F CARTACCI, AM CERRADA, M CESARONI, F CHANG, YH CHATURVEDI, UK CHEMARIN, M CHEN, A CHEN, C CHEN, GM CHEN, HF CHEN, HS CHEN, J CHEN, M CHEN, ML CHEN, WY CHIEFARI, G CHIEN, CY CHMEISSANI, M CIVININI, C CLARE, I CLARE, R COAN, TE COHN, HO COIGNET, G COLINO, N CONTIN, A CRIJNS, F CUI, XY DAI, TS DALESSANDRO, R DEASMUNDIS, R DEGRE, A DEITERS, K DENES, E DENES, P DENOTARISTEFANI, F DHINA, M DIBITONTO, D DIEMOZ, M DIMITROV, HR DIONISI, C DOVA, MT DRAGO, E DRIEVER, T DUCHESNEAU, D DUINKER, P DURAN, I ELMAMOUNI, H ENGLER, A EPPLING, FJ ERNE, FC EXTERMANN, P FABBRETTI, R FABRE, M FALCIANO, S FAN, Q FAN, SJ FACKLER, O FAY, J FELCINI, M FERGUSON, T FERNANDEZ, D FERNANDEZ, G FERRONI, F FESEFELDT, H FIANDRINI, E FIELD, J FILTHAUT, F FINOCCHIARO, G FISHER, PH FORCONI, G FOREMAN, T FREUDENREICH, K FRIEBEL, W FUKUSHIMA, M GAILLOUD, M GALAKTIONOV, Y GALLO, E GANGULI, SN GARCIAABIA, P GAU, SS GELE, D GENTILE, S GOLDFARB, S GONG, ZF GONZALEZ, E GORDEEV, A GOTTLICHER, P GOUJON, D GRATTA, G GRINNELL, C GRUENEWALD, M GUANZIROLI, M GUO, JK GURTU, A GUSTAFSON, HR GUTAY, LJ HANGARTER, K HASAN, A HAUSCHILDT, D HE, CF HEBBEKER, T HEBERT, M HERTEN, G HERTEN, U HERVE, A HILGERS, K HOFER, H HOORANI, H HU, G HU, GQ ILLE, B ILYAS, MM INNOCENTE, V JANSSEN, H JEZEQUEL, S JIN, BN JONES, LW KASSER, A KHAN, RA KAMYSHKOV, Y KAPINOS, P KAPUSTINSKY, JS KARYOTAKIS, Y KAUR, M KHOKHAR, S KIENZLEFOCACCI, MN KINNISON, WW KIRKBY, D KIRSCH, S KITTEL, W KLIMENTOV, A KONIG, AC KORNADT, O KOUTSENKO, V KOULBARDIS, A KRAEMER, RW KRAMER, T KRASTEV, VR KRENZ, W KRIVSHICH, A KRIZMANIC, J KUMAR, KS KUMAR, V KUNIN, A LANDI, G LANIUS, K LANSKE, D LANZANO, S LEBRUN, P LECOMTE, P LECOQ, P LECOULTRE, P LEE, DM LEEDOM, I LEGOFF, JM LEISTAM, L LEISTE, R LENTI, M LEONARDI, E LETTRY, J LEYTENS, X LI, C LI, HT LI, JF LI, PJ LI, Q LI, XG LIAO, JY LIN, WT LIN, ZY LINDE, FL LINDEMANN, B LINNHOFER, D LIU, R LIU, Y LOHMANN, W LONGO, E LU, YS LUBBERS, JM LUBELSMEYER, K LUCI, C LUCKEY, D LUDOVICI, L LUMINARI, L MA, WG MACDERMOTT, M MALHOTRA, PK MALIK, R MALININ, A MANA, C MAO, DN MAO, YF MAOLINBAY, M MARCHESINI, P MARTIN, JP MARTINEZLASO, L MARZANO, F MASSARO, GGG MATSUDA, T MAZUMDAR, K MCBRIDE, P MCMAHON, T MCNALLY, D MEINHOLZ, T MERK, M MEROLA, L MESCHINI, M METZGER, WJ MI, Y MILLS, GB MIR, Y MIRABELLI, G MNICH, J MOLLER, M MONTELEONI, B MORAND, R MORGANTI, S MOULAI, NE MOUNT, R MULLER, S NADTOCHY, A NAGY, E NAPOLITANO, M NEWMAN, H NEYER, C NIAZ, MA NIESSEN, L NOWAK, H ORGANTINI, G PANDOULAS, D PAULUZZI, M PAUSS, F PASSALEVA, G PAOLETTI, S PATRICELLI, S PEI, YJ PERRETGALLIX, D PERRIER, J PEVSNER, A PIERI, M PIROUE, PA PLASIL, F PLYASKIN, V POHL, M POJIDAEV, V PRODUIT, N QIAN, JM QURESHI, KN RAGHAVAN, R RAHALCALLOT, G RAVEN, G RAZIS, P READ, K REN, D REN, Z RESCIGNO, M REUCROFT, S RICKER, A RIEMANN, S RIND, O RIZVI, HA ROE, BP ROHNER, M ROHNER, S ROMERO, L ROSE, J ROSIERLEES, S ROSMALEN, R ROSSELET, P RUBBIA, A RUBIO, JA RYKACZEWSKI, H SACHWITZ, M SALICIO, J SALICIO, JM SANDERS, GS SANTOCCHIA, A SARAKINOS, MS SARTORELLI, G SAUVAGE, G SAVIN, A SCHEGELSKY, V SCHMIEMANN, K SCHMITZ, D SCHMITZ, P SCHNEEGANS, M SCHOPPER, H SCHOTANUS, DJ SHOTKIN, S SCHREIBER, HJ SHUKLA, J SCHULTE, R SCHULTE, S SCHULTZE, K SCHUTTE, J SCHWENKE, J SCHWERING, G SCIACCA, C SCOTT, I SEHGAL, R SEILER, PG SENS, JC SERVOLI, L SHEER, I SHEN, DZ SHEVCHENKO, S SHI, XR SHMAKOV, K SHUMILOV, E SHOUTKO, V SODERSTROM, E SOPCZAK, A SPARTIOTIS, C SPICKERMANN, T SPILLANTINI, P STAROSTA, R STEUER, M STICKLAND, DP STICOZZI, F STONE, H STRAUCH, K STRINGFELLOW, BC SUDHAKAR, K SULTANOV, G SUMNER, RL SUN, LZ SUTER, H SUTTON, RB SWAIN, JD SYED, AA TANG, XW TARKOVSKY, E TAYLOR, L TIMMERMANS, C TING, SCC TING, SM TONUTTI, M TONWAR, SC TOTH, J TSAREGORODTSEV, A TSIPOLITIS, G TULLY, C TUNG, KL ULBRICHT, J URBAN, L UWER, U VALENTE, E VANDEWALLE, RT VETLITSKY, I VIERTEL, G VIKAS, P VIKAS, U VIVARGENT, M VOGEL, H VOGT, H VONDARDEL, G VOROBIEV, I VOROBYOV, AA VUILLEUMIER, L WADHWA, M WALLRAFF, W WANG, CR WANG, GH WANG, JH WANG, QF WANG, XL WANG, YF WANG, Z WANG, ZM WEBER, A WEBER, J WEILL, R WENAUS, TJ WENNINGER, J WHITE, M WILLMOTT, C WITTGENSTEIN, F WRIGHT, D WU, RJ WU, SL WU, SX WU, YG WYSLOUCH, B XIE, YY XU, YD XU, ZZ XUE, ZL YAN, DS YAN, XJ YANG, BZ YANG, CG YANG, G YANG, KS YANG, QY YANG, ZQ YE, CH YE, JB YE, Q YEH, SC YIN, ZW YOU, JM YZERMAN, M ZACCARDELLI, C ZEMP, P ZENG, M ZENG, Y ZHANG, DH ZHANG, ZP ZHOU, JF ZHU, RY ZHUANG, HL ZICHICHI, A TI A DIRECT DETERMINATION OF THE NUMBER OF LIGHT NEUTRINO FAMILIES FROM E+E--]NU-NU-BAR-GAMMA AT LEP SO PHYSICS LETTERS B LA English DT Article ID SUPERSYMMETRIC PARTICLES; E+E COLLISIONS; SINGLE PHOTONS; SEARCH; ANNIHILATION; SCATTERING AB The L3 detector at LEP has been used to determine the number of light neutrino families by measuring the cross section of single photon even in e+e- collisions at energies near the Z0 resonance. We have observed 61 single photon candidates with more than 1.5 GeV of deposited energy in the barrel electromagnetic calorimeter, for a total integrated luminosity of 3.0 pb-1. From a likelihood fit to the single photon cross sections, we determine N(nu) = 3.24 +/- 0.46 (statistical) +/- 0.22 (systematic). C1 IST NAZL FIS NUCL,SEZ FIRENZE,I-50125 FLORENCE,ITALY. UNIV FLORENCE,I-50125 FLORENCE,ITALY. CTR INVEST ENERGETICAS MEDIOAMBIENTALES & TECNOL,E-28040 MADRID,SPAIN. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. NAPLES UNIV,I-80125 NAPLES,ITALY. IST NAZL FIS NUCL,SEZ NAPOLI,I-80125 NAPLES,ITALY. NORTHEASTERN UNIV,BOSTON,MA 02115. UNIV PERUGIA,I-06100 PERUGIA,ITALY. IST NAZL FIS NUCL,SEZ PERUGIA,I-06100 PERUGIA,ITALY. WORLD LAB,FBLJA PROJECT,CH-1211 GENEVA,SWITZERLAND. SWISS FED INST TECHNOL,CH-8093 ZURICH,SWITZERLAND. MIT,CAMBRIDGE,MA 02139. ST PETERSBURG NUCL PHYS INST,ST PETERSBURG 188350,USSR. UNIV LYON 1,INST PHYS NUCL LYON,CNRS,F-69622 VILLEURBANNE,FRANCE. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. INST HIGH ENERGY PHYS,BEIJING,PEOPLES R CHINA. UNIV SCI & TECHNOL CHINA,HEFEI 230029,PEOPLES R CHINA. OAK RIDGE NATL LAB,OAK RIDGE,TN 37830. CATHOLIC UNIV NIJMEGEN,NIJMEGEN,NETHERLANDS. NATL INST NUCL PHYS & HIGH ENERGY PHYS,6525 ED NIJMEGEN,NETHERLANDS. PAUL SCHERRER INST,WURENLINGEN,SWITZERLAND. SHANGHAI INST CERAM,SHANGHAI,PEOPLES R CHINA. INST HOCHENERGIEPHYS,O-1615 ZEUTHEN,GERMANY. UNIV LAUSANNE,CH-1015 LAUSANNE,SWITZERLAND. CALTECH,PASADENA,CA 91125. HARVARD UNIV,CAMBRIDGE,MA 02139. UNIV HAMBURG,W-2000 HAMBURG 13,GERMANY. CLANP,CENT LAB AUTOMAT & INSTRUMENTAT,SOFIA,BULGARIA. IST NAZL FIS NUCL,SEZ BOLOGNA,I-40126 BOLOGNA,ITALY. UNIV MICHIGAN,ANN ARBOR,MI 48109. TATA INST FUNDAMENTAL RES,BOMBAY 400005,INDIA. UNIV ROME LA SAPIENZA,I-00185 ROME,ITALY. IST NAZL FIS NUCL,SEZ ROMA,I-00185 ROME,ITALY. UNIV ALABAMA,TUSCALOOSA,AL 35486. UNIV GENEVA,CH-1211 GENEVA 4,SWITZERLAND. LAB PHYS PARTICULES,F-74519 ANNECY LE VIEUX,FRANCE. HUNGARIAN ACAD SCI,CENT RES INST PHYS,H-1525 BUDAPEST 114,HUNGARY. RHEIN WESTFAL TH AACHEN,INST PHYS 1,W-5100 AACHEN,GERMANY. RHEIN WESTFAL TH AACHEN,INST PHYS 3,W-5100 AACHEN,GERMANY. NATL INST NUCL PHYS & HIGH ENERGY PHYS,NATL INST HIGH ENERGY PHYS,1009 DB AMSTERDAM,NETHERLANDS. UNIV CALIF SAN DIEGO,SAN DIEGO,CA 92182. CARNEGIE MELLON UNIV,PITTSBURGH,PA 15213. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87544. RP ADEVA, B (reprint author), CERN,EUROPEAN LAB PARTICLE PHYS,CH-1211 GENEVA 23,SWITZERLAND. RI Fiandrini, Emanuele/C-4549-2008; Berdugo, Javier/A-2858-2015; D'Alessandro, Raffaello/F-5897-2015; Chmeissani, Mokhtar/G-4346-2015; Leijtens, Xaveer/F-3302-2010; Ludovici, Lucio/F-5917-2011; Servoli, Leonello/E-6766-2012; bertucci, bruna/J-5237-2012; Cerrada, Marcos/J-6934-2014; Gonzalez Romero, Enrique/L-7561-2014; Vogel, Helmut/N-8882-2014; Ferguson, Thomas/O-3444-2014; Duran, Ignacio/H-7254-2015; Adeva, Bernardo /L-1378-2014; Hoorani, Hafeez/D-1791-2013; Arce, Pedro/L-1268-2014; Kamyshkov, Yuri/J-7999-2016 OI Berdugo, Javier/0000-0002-7911-8532; D'Alessandro, Raffaello/0000-0001-7997-0306; Chmeissani, Mokhtar/0000-0002-2287-4791; Leijtens, Xaveer/0000-0001-7794-8236; Ludovici, Lucio/0000-0003-1970-9960; Servoli, Leonello/0000-0003-1725-9185; Cerrada, Marcos/0000-0003-0112-1691; Gonzalez Romero, Enrique/0000-0003-2376-8920; Vogel, Helmut/0000-0002-6109-3023; Ferguson, Thomas/0000-0001-5822-3731; Adeva, Bernardo /0000-0001-9756-3712; Arce, Pedro/0000-0003-3009-0484; Kamyshkov, Yuri/0000-0002-3789-7152 NR 32 TC 28 Z9 28 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD JAN 23 PY 1992 VL 275 IS 1-2 BP 209 EP 221 DI 10.1016/0370-2693(92)90877-7 PG 13 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HE836 UT WOS:A1992HE83600037 ER PT J AU ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B ASTIER, P AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M BONIVENTO, W BOOTH, PSL BORATAV, M BORGEAUD, P BORNER, H BOSIO, C BOSTJANCIC, B BOTNER, O BOUQUET, B BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHAPKIN, M CHARPENTIER, P CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DERKAOUI, J DICIACCIO, L DIJKSTRA, H DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DULINSKI, W DZHELYADIN, R EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F FORBES, KAJ FORSBACH, H FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GLITZA, KW GOKIELI, R GOLOVATYUK, VM CADENAS, JGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROS, MH GROSDIDIER, G GROSS, E GROSSETETE, B GROSSEWIESMANN, P GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW HENKES, T HERBST, I HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIUKHIN, V KOURKOUMELIS, C KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIKO, D LIEB, E LILLETHUN, E LINDGREN, J LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B LOKAJICEK, M LOKEN, JG AGUERA, MAL LOPEZFERNANDEZ, A LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUCOCK, R LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MENICHETTI, E MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MYATT, G NARAGHI, F NAUKORZEN, U NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A PYYHTIA, J RADOJJCIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR SMIRNOV, N SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S THEODOSIOU, G TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O UVAROV, VA VALENTI, G VALLAZZA, E FERRER, JAV VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VANDERVELDE, C VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VIBERT, L VILANOVA, D VISHNEVSKY, N VLASOV, EV VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J AF ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B ASTIER, P AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M BONIVENTO, W BOOTH, PSL BORATAV, M BORGEAUD, P BORNER, H BOSIO, C BOSTJANCIC, B BOTNER, O BOUQUET, B BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHAPKIN, M CHARPENTIER, P CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DERKAOUI, J DICIACCIO, L DIJKSTRA, H DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DULINSKI, W DZHELYADIN, R EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F FORBES, KAJ FORSBACH, H FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GLITZA, KW GOKIELI, R GOLOVATYUK, VM CADENAS, JGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROS, MH GROSDIDIER, G GROSS, E GROSSETETE, B GROSSEWIESMANN, P GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW HENKES, T HERBST, I HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIUKHIN, V KOURKOUMELIS, C KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIKO, D LIEB, E LILLETHUN, E LINDGREN, J LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B LOKAJICEK, M LOKEN, JG AGUERA, MAL LOPEZFERNANDEZ, A LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUCOCK, R LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MENICHETTI, E MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MYATT, G NARAGHI, F NAUKORZEN, U NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A PYYHTIA, J RADOJJCIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR SMIRNOV, N SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S THEODOSIOU, G TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O UVAROV, VA VALENTI, G VALLAZZA, E FERRER, JAV VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VANDERVELDE, C VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VIBERT, L VILANOVA, D VISHNEVSKY, N VLASOV, EV VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J TI SEARCH FOR SCALAR LEPTOQUARKS FROM Z(0) DECAYS SO PHYSICS LETTERS B LA English DT Article ID LUND MONTE-CARLO; JET FRAGMENTATION; HADRONIC DECAYS; E+E; PHYSICS; BOSON AB We have searched for pair produced scalar leptoquarks each decaying to a quark and a charged lepton in a sample of 116 000 hadronic Z0 events produced at LEP. No candidate was detected and cross section and branching ratio limits are set for the above process at 95% CL. Mass limits are found to be about 42 GeV/c2 depending only slightly on the models used and a coupling times branching ratio exclusion line is drawn for a scalar leptoquark with a free coupling. We have also probed the mass region above 45 GeV/c2 for a singly produced scalar leptoquark and set limits on the cross section and the coupling lambda(2)/4-pi up to 60 GeV. C1 CERN, CH-1211 GENEVA 23, SWITZERLAND. AUSTRIAN ACAD SCI, INST HOCHENERGIEPHYS, A-1050 VIENNA, AUSTRIA. CENS, DPHPE, F-91191 GIF SUR YVETTE, FRANCE. RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND. UNIV LUND, DEPT PHYS, S-22363 LUND, SWEDEN. JOINT INST NUCL RES DUBNA, MOSCOW 101000, USSR. UNIV VALENCIA, CSIC, CTR MIXTO, INST FIS CORPUSCULAR, E-46100 BURJASSOT, SPAIN. DEPT FIS ATOM MOLEC & NUCL, E-46100 BURJASSOT, SPAIN. UNIV BERGEN, DEPT PHYS, N-5007 BERGEN, NORWAY. UNIV ATHENS, PHYS LAB, GR-10680 ATHENS, GREECE. UNIV KARLSRUHE, INST EXPTL KERNPHYS, W-7500 KARLSRUHE 1, GERMANY. UNIV LYON 1, F-69622 VILLEURBANNE, FRANCE. UNIV STOCKHOLM, INST PHYS, S-11346 STOCKHOLM, SWEDEN. UNIV PARIS 06 & 7, LPNHE, F-75230 PARIS 05, FRANCE. UNIV PARIS 11, ACCELERATEUR LINEAIRE LAB, F-91405 ORSAY, FRANCE. NATL INST NUCL PHYS & HIGH ENERGY PHYS, 1009 DB AMSTERDAM, NETHERLANDS. UNIV GRENOBLE 1, INST SCI NUCL, F-38026 ST MARTIN DHERES, FRANCE. UNIV TRIESTE, DIPARTMENTO FIS, I-34127 TRIESTE, ITALY. IST NAZL FIS NUCL, I-34127 TRIESTE, ITALY. UNIV UDINE, IST FIS, I-33100 UDINE, ITALY. IST NAZL FIS NUCL, IST SUPER SANITA, I-00161 ROME, ITALY. UNIV OXFORD, NUCL PHYS LAB, OXFORD OX1 3RH, ENGLAND. UNIV MILANO, DIPARTIMENTO FIS, I-20133 MILAN, ITALY. IST NAZL FIS NUCL, I-20133 MILAN, ITALY. UNIV GESAMTHSCH WUPPERTAL, FACHBEREICH PHYS, W-5600 WUPPERTAL 1, GERMANY. UNIV GENOA, DIPARTIMENTO FIS, I-16146 GENOA, ITALY. IST NAZL FIS NUCL, I-16146 GENOA, ITALY. COLL FRANCE, PHYS CORPUSCULAIRE LAB, F-75231 PARIS 05, FRANCE. SERPUKHOV HIGH ENERGY PHYS INST, PROTUINO 142284, USSR. NATL RES COUNCIL DEMOKRITOS, INST NUCL PHYS, GR-15310 ATHENS, GREECE. LEPSI, F-67037 STRASBOURG, FRANCE. CTR RECH NUCL, DIV HAUTES ENERGIES, GRP DELPHI, F-67037 STRASBOURG, FRANCE. UNIV LIVERPOOL, DEPT PHYS, LIVERPOOL L69 3BX, ENGLAND. UNIV UPPSALA, DEPT RADIAT SCI, S-75121 UPPSALA, SWEDEN. UNIV PADUA, DIPARTMENTO FIS, I-35131 PADUA, ITALY. IST NAZL FIS NUCL, I-35131 PADUA, ITALY. UNIV HELSINKI, DEPT HIGH ENERGY PHYS, SF-00170 HELSINKI 17, FINLAND. UNIV OSLO, DEPT PHYS, N-1000 OSLO 3, NORWAY. UNIV SANTANDER, FAC CIENCIAS, E-39005 SANTANDER, SPAIN. UNIV BOLOGNA, DIPARTMENTO FIS, I-40126 BOLOGNA, ITALY. IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY. IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS, AMES, IA 50011 USA. UNIV COMPLUTENSE MADRID, DEPT FIS ATOM MOLEC & NUCL, E-28040 MADRID, SPAIN. NIELS BOHR INST, DK-2100 COPENHAGEN 0, DENMARK. INST NUCL STUDIES, PL-00681 WARSAW, POLAND. UNIV WARSAW, PL-00681 WARSAW, POLAND. NATL TECH UNIV ATHENS, DEPT PHYS, GR-15773 ATHENS, GREECE. INST NUCL PHYS, HIGH ENERGY PHYS LAB, PL-30055 KRAKOW 30, POLAND. UNIV AIX MARSEILLE 2, FAC SCI LUMINY, F-13288 MARSEILLE 09, FRANCE. UNIV INSTELLING ANTWERP, DEPT PHYS, B-2610 WILRIJK, BELGIUM. UNIV LIBRE BRUXELLES VRIJE UNIV BRUSSEL, IIHE, B-1050 BRUSSELS, BELGIUM. UNIV ETAT MONS, FAC SCI, SERV PHYS PARTICULES ELEMENTAIRES, B-7000 MONS, BELGIUM. UNIV TURIN, DIPARTIMENTO FIS SPERIMENTALE, I-10125 TURIN, ITALY. IST NAZL FIS NUCL, I-10125 TURIN, ITALY. UNIV ROME 2, DIPARTIMENTO FIS, I-00173 ROME, ITALY. IST NAZL FIS NUCL, I-00173 ROME, ITALY. RP ABREU, P (reprint author), LIP, AV ELIAS GARCIA 14 1E, P-1000 LISBON, PORTUGAL. RI Fernandez-Alonso, Mercedes/F-2557-2016; Lozano-Bahilo, Julio/F-4881-2016; Olshevskiy, Alexander/I-1580-2016; Hernandez-Rey, Juan Jose/N-5955-2014; Abreu, Pedro/L-2220-2014; Barao, Fernando/O-2357-2016; Zaitsev, Alexandre/B-8989-2017; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Zukanovich Funchal, Renata/C-5829-2013; Contreras Gonzalez, Jose Luis/K-7255-2014; Pimenta, Mario/M-1741-2013; Ragazzi, Stefano/D-2463-2009; Roditi, Itzhak/O-7448-2014; Zuniga, Juan/P-4385-2014; Michelotto, Michele/A-9571-2013; Matorras, Francisco/I-4983-2015; Ferrer, Antonio/H-2942-2015; Rovelli, Tiziano/K-4432-2015; Marti-Garcia, Salvador/F-3085-2011; Vaz, Pedro/K-2464-2013; de Groot, Nicolo/A-2675-2009; Katsanevas, Stavros/A-4297-2011; Ruiz, Alberto/E-4473-2011; branchini, paolo/A-4857-2011; Shellard, Ronald/G-4825-2012; Giacomelli, Paolo/B-8076-2009; Fruhwirth, Rudolf/H-2529-2012; Dracos, Marcos/K-2335-2012; Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; Zalewski, Piotr/H-7335-2013 OI DE MIN, ALBERTO/0000-0002-8130-9389; Demaria, Natale/0000-0003-0743-9465; Bonesini, Maurizio/0000-0001-5119-1896; Sannino, Mario/0000-0001-7700-8383; De Angelis, Alessandro/0000-0002-3288-2517; De Lotto, Barbara/0000-0003-3624-4480; Benlloch Baviera, Jose Maria/0000-0001-6073-1436; Tabarelli de Fatis, Tommaso/0000-0001-6262-4685; Lacasta, Carlos/0000-0002-2623-6252; Fernandez-Alonso, Mercedes/0000-0002-1311-5275; Lozano-Bahilo, Julio/0000-0003-0613-140X; Olshevskiy, Alexander/0000-0002-8902-1793; Hernandez-Rey, Juan Jose/0000-0002-1527-7200; Abreu, Pedro/0000-0002-9973-7314; Barao, Fernando/0000-0002-8346-9941; Zaitsev, Alexandre/0000-0002-4961-8368; Matteuzzi, Clara/0000-0002-4047-4521; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Zukanovich Funchal, Renata/0000-0001-6749-0022; Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Pimenta, Mario/0000-0002-2590-0908; Ragazzi, Stefano/0000-0001-8219-2074; Roditi, Itzhak/0000-0003-2363-5626; Zuniga, Juan/0000-0002-1041-6451; Michelotto, Michele/0000-0001-6644-987X; Matorras, Francisco/0000-0003-4295-5668; Ferrer, Antonio/0000-0003-0532-711X; Rovelli, Tiziano/0000-0002-9746-4842; Vaz, Pedro/0000-0002-7186-2359; Ruiz, Alberto/0000-0002-3639-0368; Shellard, Ronald/0000-0002-2983-1815; Dracos, Marcos/0000-0003-0514-193X; NR 29 TC 31 Z9 31 U1 0 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD JAN 23 PY 1992 VL 275 IS 1-2 BP 222 EP 230 DI 10.1016/0370-2693(92)90878-8 PG 9 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HE836 UT WOS:A1992HE83600038 ER PT J AU ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOTNER, O BOUQUET, B BOURDARIOS, C BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHAPKIN, M CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C DELASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J DOLL, O DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DULINSKI, W EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FALALEEV, V FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F FORBES, KAJ FORSBACH, H FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GLITZA, KW GOKIELI, R GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW HENKES, T HERBST, I HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KOURKOUMELIS, C KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIEB, E LIKO, D LILLETHUN, E LINDGREN, J LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAGNUSSEN, N MAILLARD, J MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G MATVEEV, M MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MENICHETTI, E MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAUKORZEN, U NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OESTERBERG, K OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONJIN, V RONNQVIST, C ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TORASSA, E TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VILANOVA, D VITALE, L VLASOV, E VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J AF ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOTNER, O BOUQUET, B BOURDARIOS, C BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHAPKIN, M CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C DELASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J DOLL, O DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DULINSKI, W EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FALALEEV, V FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F FORBES, KAJ FORSBACH, H FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GLITZA, KW GOKIELI, R GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW HENKES, T HERBST, I HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KOURKOUMELIS, C KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIEB, E LIKO, D LILLETHUN, E LINDGREN, J LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAGNUSSEN, N MAILLARD, J MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G MATVEEV, M MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MENICHETTI, E MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAUKORZEN, U NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OESTERBERG, K OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONJIN, V RONNQVIST, C ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TORASSA, E TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VILANOVA, D VITALE, L VLASOV, E VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J TI PRODUCTION OF STRANGE PARTICLES IN THE HADRONIC DECAYS OF THE Z(0) SO PHYSICS LETTERS B LA English DT Article ID LUND MONTE-CARLO; JET FRAGMENTATION; QUARK SUPPRESSION; PHYSICS AB An analysis of the production of strange particles from the decays of the Z0 boson into multihadronic final states is presented. The analysis is based on about 90 000 selected hadronic Z0 decays collected by the DELPHI detector at LEP in 1990. K(s)0, K* +/-, LAMBDA(LAMBDABAR) and XI- (XI+) have been identified by their characteristic decays. The measured production cross sections are compared with predictions of the Lund Monte Carlo tuned to data at PEP/PETRA energies. C1 AUSTRIAN ACAD SCI, INST HOCHENERGIEPHYS, A-1050 VIENNA, AUSTRIA. CENS, DPHPE, F-91191 GIF SUR YVETTE, FRANCE. RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND. UNIV LUND, DEPT PHYS, S-22363 LUND, SWEDEN. DUBNA JOINT NUCL RES INST, MOSCOW 101000, USSR. UNIV VALENCIA, CSIC, CTR FIS CORPUSCULAR, E-46100 BURJASSOT, SPAIN. UNIV VALENCIA, DEPT FIS ATOM MOLEC & NUCL, E-46100 BURJASSOT, SPAIN. UNIV BERGEN, DEPT PHYS, N-5007 BERGEN, NORWAY. CERN, CH-1211 GENEVA 23, SWITZERLAND. UNIV ATHENS, PHYS LAB, GR-10680 ATHENS, GREECE. UNIV LYON 1, F-69622 VILLEURBANNE, FRANCE. UNIV KARLSRUHE, INST EXPTL KERNPHYS, W-7500 KARLSRUHE 1, GERMANY. UNIV STOCKHOLM, INST PHYS, S-11346 STOCKHOLM, SWEDEN. UNIV PARIS 11, ACCELERATEUR LINEAIRE LAB, F-91405 ORSAY, FRANCE. NATL INST KERNPHYS & HOGE ENERGIEFYS H 21, 1009 DB AMSTERDAM, NETHERLANDS. UNIV GRENOBLE 1, INST SCI NUCL, F-38026 GRENOBLE, FRANCE. UNIV TRIESTE, DIPARTMENTO FIS, I-34127 TRIESTE, ITALY. IST NAZL FIS NUCL, I-34127 TRIESTE, ITALY. UNIV UDINE, IST FIS, I-33100 UDINE, ITALY. IST NAZL FIS NUCL, IST SUPER SANITA, I-00161 ROME, ITALY. UNIV OXFORD, NUCL PHYS LAB, OXFORD OX1 3RH, ENGLAND. UNIV MILAN, DIPARTMENTO FIS, I-20133 MILAN, ITALY. IST NAZL FIS NUCL, I-20133 MILAN, ITALY. UNIV PARIS 06 & 7, LPNHE, F-75230 PARIS 05, FRANCE. UNIV GESAMTHSCH WUPPERTAL, FACHBEREICH PHYS, W-5600 WUPPERTAL 1, GERMANY. UNIV GENOA, DIPARTIMENTO FIS, I-16146 GENOA, ITALY. IST NAZL FIS NUCL, I-16146 GENOA, ITALY. COLL FRANCE, PHYS CORPUSCULAIRE LAB, F-75231 PARIS 05, FRANCE. SERPUKHOV HIGH ENERGY PHYS INST, PROTVINO 142284, USSR. NATL RES COUNCIL DEMOKRITOS, INST NUCL PHYS, GR-15310 ATHENS, GREECE. IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS, AMES, IA 50011 USA. UNIV COMPLUTENSE MADRID, E-28040 MADRID, SPAIN. NIELS BOHR INST, DK-2100 COPENHAGEN 0, DENMARK. INST NUCL STUDIES, PL-00681 WARSAW, POLAND. UNIV WARSAW, PL-00681 WARSAW, POLAND. NATL TECH UNIV ATHENS, DEPT PHYS, GR-15773 ATHENS, GREECE. INST NUCL PHYS, HIGH ENERGY PHYS LAB, PL-30055 KRAKOW 30, POLAND. UNIV LANCASTER, SCH PHYS & MAT, LANCASTER LA1 4YB, ENGLAND. UNIV AIX MARSEILLE 2, F-13288 MARSEILLE 09, FRANCE. CTR RECH NUCL, DELPHI GRP, DIV HAUTES ENERGIES, F-67037 STRASBOURG, FRANCE. LEPSI, F-67037 STRASBOURG, FRANCE. UNIV INSTELLING ANTWERP, DEPT PHYS, B-2610 WILRIJK, BELGIUM. UNIV LIBRE BRUXELLES VRIJE UNIV BRUSSEL, IIHE 3, B-1050 BRUSSELS, BELGIUM. UNIV ETAT MONS, FAC SCI, SERV PHYS PARTICULES ELEMENTAIRES, B-7000 MONS, BELGIUM. UNIV TURIN, DIPARTIMENTO FIS SPERIMENTALE, I-10125 TURIN, ITALY. IST NAZL FIS NUCL, I-10125 TURIN, ITALY. UNIV ROME 2, DIPARTIMENTO FIS, I-00173 ROME, ITALY. IST NAZL FIS NUCL, I-00173 ROME, ITALY. UNIV LIVERPOOL, DEPT PHYS, LIVERPOOL L69 3BX, ENGLAND. UNIV UPPSALA, DEPT RADIAT SCI, S-75121 UPPSALA, SWEDEN. UNIV PADUA, DIPARTMENTO FIS, I-35131 PADUA, ITALY. IST NAZL FIS NUCL, I-35131 PADUA, ITALY. UNIV HELSINKI, DEPT HIGH ENERGY PHYS, SF-00170 HELSINKI 17, FINLAND. UNIV OSLO, DEPT PHYS, N-1000 OSLO 3, NORWAY. UNIV SANTANDER, FAC CIENCIAS, E-39005 SANTANDER, SPAIN. UNIV BOLOGNA, DIPARTMENTO FIS, I-40126 BOLOGNA, ITALY. IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY. RP ABREU, P (reprint author), LIP, AV ELIAS GARCIA 1E, P-1000 LISBON, PORTUGAL. RI Vaz, Pedro/K-2464-2013; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Zukanovich Funchal, Renata/C-5829-2013; Contreras Gonzalez, Jose Luis/K-7255-2014; Pimenta, Mario/M-1741-2013; Gomez Cadenas, Juan Jose/L-2003-2014; Ragazzi, Stefano/D-2463-2009; Roditi, Itzhak/O-7448-2014; Zuniga, Juan/P-4385-2014; Michelotto, Michele/A-9571-2013; Matorras, Francisco/I-4983-2015; de Groot, Nicolo/A-2675-2009; Katsanevas, Stavros/A-4297-2011; Ruiz, Alberto/E-4473-2011; branchini, paolo/A-4857-2011; Shellard, Ronald/G-4825-2012; Torassa, Ezio/I-1788-2012; Fruhwirth, Rudolf/H-2529-2012; Dracos, Marcos/K-2335-2012; Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011; Giacomelli, Paolo/B-8076-2009; Ferrer, Antonio/H-2942-2015; Rovelli, Tiziano/K-4432-2015; Lozano-Bahilo, Julio/F-4881-2016; Olshevskiy, Alexander/I-1580-2016; Paganoni, Marco/A-4235-2016; Hernandez-Rey, Juan Jose/N-5955-2014; Abreu, Pedro/L-2220-2014; Barao, Fernando/O-2357-2016; Zaitsev, Alexandre/B-8989-2017; OI Vaz, Pedro/0000-0002-7186-2359; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Zukanovich Funchal, Renata/0000-0001-6749-0022; Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Pimenta, Mario/0000-0002-2590-0908; Gomez Cadenas, Juan Jose/0000-0002-8224-7714; Ragazzi, Stefano/0000-0001-8219-2074; Roditi, Itzhak/0000-0003-2363-5626; Zuniga, Juan/0000-0002-1041-6451; Michelotto, Michele/0000-0001-6644-987X; Matorras, Francisco/0000-0003-4295-5668; Ruiz, Alberto/0000-0002-3639-0368; Shellard, Ronald/0000-0002-2983-1815; Dracos, Marcos/0000-0003-0514-193X; Torassa, Ezio/0000-0003-2321-0599; DE MIN, ALBERTO/0000-0002-8130-9389; Demaria, Natale/0000-0003-0743-9465; Bonesini, Maurizio/0000-0001-5119-1896; Sannino, Mario/0000-0001-7700-8383; De Angelis, Alessandro/0000-0002-3288-2517; De Lotto, Barbara/0000-0003-3624-4480; Benlloch Baviera, Jose Maria/0000-0001-6073-1436; Tabarelli de Fatis, Tommaso/0000-0001-6262-4685; Lacasta, Carlos/0000-0002-2623-6252; Ferrer, Antonio/0000-0003-0532-711X; Rovelli, Tiziano/0000-0002-9746-4842; Lozano-Bahilo, Julio/0000-0003-0613-140X; Olshevskiy, Alexander/0000-0002-8902-1793; Paganoni, Marco/0000-0003-2461-275X; Hernandez-Rey, Juan Jose/0000-0002-1527-7200; Abreu, Pedro/0000-0002-9973-7314; Barao, Fernando/0000-0002-8346-9941; Zaitsev, Alexandre/0000-0002-4961-8368; Matteuzzi, Clara/0000-0002-4047-4521 NR 21 TC 52 Z9 52 U1 0 U2 10 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD JAN 23 PY 1992 VL 275 IS 1-2 BP 231 EP 242 DI 10.1016/0370-2693(92)90879-9 PG 12 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HE836 UT WOS:A1992HE83600039 ER PT J AU HENDERSON, SJ NEWSHOLME, P HEIDORN, DB MITCHELL, R SEEGER, PA WALSH, DA TREWHELLA, J AF HENDERSON, SJ NEWSHOLME, P HEIDORN, DB MITCHELL, R SEEGER, PA WALSH, DA TREWHELLA, J TI SOLUTION STRUCTURE OF PHOSPHORYLASE-KINASE STUDIED USING SMALL-ANGLE X-RAY AND NEUTRON-SCATTERING SO BIOCHEMISTRY LA English DT Article ID DEPENDENT PROTEIN-KINASE; SUBUNIT PHOSPHORYLATION; SKELETAL-MUSCLE; CALMODULIN; MICROSCOPY; COMPLEXES; DOMAIN AB Small-angle X-ray and neutron scattering have been used to characterize the solution structure of rabbit skeletal phosphorylase kinase. The radius of gyration of the unactivated holoenzyme determined from neutron scattering is 94 angstrom, and its maximum dimension is approximately 275-295 angstrom. A planar model has been constructed that is in general agreement with the dimensions of the transmission electron microscope images of negatively stained phosphorylase kinase and that gives values for the radius of gyration, maximum linear dimension, and a pair distribution function for the structure that are consistent with the scattering data. C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. UNIV CALIF LOS ALAMOS SCI LAB,LANSCE,LOS ALAMOS,NM 87545. UNIV CALIF DAVIS,DEPT BIOL CHEM,DAVIS,CA 95616. OI Trewhella, Jill/0000-0002-8555-6766 FU NIDDK NIH HHS [DK13613]; NIGMS NIH HHS [GM40528] NR 22 TC 8 Z9 8 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD JAN 21 PY 1992 VL 31 IS 2 BP 437 EP 442 DI 10.1021/bi00117a019 PG 6 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA HA993 UT WOS:A1992HA99300019 PM 1731902 ER PT J AU CREMO, CR LOO, JA EDMONDS, CG HATLELID, KM AF CREMO, CR LOO, JA EDMONDS, CG HATLELID, KM TI VANADATE CATALYZES PHOTOCLEAVAGE OF ADENYLATE KINASE AT PROLINE-17 IN THE PHOSPHATE-BINDING LOOP SO BIOCHEMISTRY LA English DT Article ID SUBFRAGMENT-1 HEAVY-CHAIN; MYOSIN SUBFRAGMENT-1; MASS-SPECTROMETRY; SKELETAL MYOSIN; ACTIVE-SITE; ELECTROSPRAY IONIZATION; DEPENDENT MODIFICATION; ESCHERICHIA-COLI; INDUCED-FIT; CLEAVAGE AB Irradiation of adenylate kinase (AK) from chicken muscle with 300-400-nm light in the presence of 0.25 mM vanadate ion first inactivated the enzyme and then cleaved the polypeptide chain near the NH2 terminus. The addition of the multisubstrate analogue, P1,P5-bis(5'-adenosyl) pentaphosphate, prevented both effects. ATP, but not AMP, blocked both inactivation and cleavage in a saturable manner, suggesting that both effects were due to modification at the ATP-binding site. The polypeptide products of the photocleavage were isolated by HPLC and characterized by amino acid composition, peptide sequencing, and mass spectral analyses. The predominant (> 90%) small peptide fragment contained the first 16 amino acids from the amino terminus of the enzyme. The amino terminus of this peptide contained an acetylated serine, and the "carboxy" terminus was modified by a cyclized gamma-aminobutyric acid which originated from photooxidation and decarboxylation of proline-17 by vanadate. Edman sequencing indicated that the majority of the large peptide fragment (M(r) is similar to 19 500) was amino-terminal blocked, but a small portion was sequenceable starting at either glycine-18 (7%) or serine-19 (2%). These studies indicate that in the ATPs-AK complex proline-17 is close to the phosphate chain of ATP but not AMP, consistent with the latest evaluation of nucleotide-binding sites on mitochondrial matrix AK by X-ray crystallography [Diederichs, K., & Schulz, G. E. (1991) J. Mol. Biol. 217, 541-549]. Furthermore, this is the first report that an amino acid other than serine can be involved in vanadate-promoted photocleavage reactions. C1 COLUMBIA COLL, DEPT CHEM, COLUMBIA, CA 95310 USA. PACIFIC NW LAB, DEPT CHEM SCI, CHEM METHODS & SEPARAT GRP, RICHLAND, WA 99352 USA. RP WASHINGTON STATE UNIV, DEPT BIOCHEM & BIOPHYS, PULLMAN, WA 99164 USA. FU NHGRI NIH HHS [HG 00327]; NIAMS NIH HHS [AR 39937] NR 42 TC 52 Z9 52 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD JAN 21 PY 1992 VL 31 IS 2 BP 491 EP 497 DI 10.1021/bi00117a027 PG 7 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA HA993 UT WOS:A1992HA99300027 PM 1731908 ER PT J AU KIM, DH BRITT, RD KLEIN, MP SAUER, K AF KIM, DH BRITT, RD KLEIN, MP SAUER, K TI THE MANGANESE SITE OF THE PHOTOSYNTHETIC OXYGEN-EVOLVING COMPLEX PROBED BY EPR SPECTROSCOPY OF ORIENTED PHOTOSYSTEM-II MEMBRANES - THE G = 4 AND G = 2 MULTILINE SIGNALS SO BIOCHEMISTRY LA English DT Article ID ELECTRON-PARAMAGNETIC-RES; WATER-SPLITTING ENZYME; O-2-EVOLVING COMPLEX; MAGNETIC-PROPERTIES; AMMONIA BINDS; S-2 STATE; S2 STATE; EVOLUTION; SPECTRA; SYSTEM AB The g = 4 and g = 2 multiline EPR signals arising from the Mn cluster of the photosynthetic oxygen-evolving complex (OEC) in the S2 state were studied in preparations of oriented photosystem Il (PSII) membranes. The ammonia-modified forms of these two signals were also examined. The g = 4 signal obtained in oriented PSII membranes treated with NH4Cl at pH 7.5 displays at least 16 partially resolved Mn hyperfine transitions with a regular spacing of 36 G [Kim, D. H., Britt, R. D., Klein, M. P., & Sauer, K. (1990) J. Am. Chem. Soc. 112, 9389-9391]. The observation of this g = 4 "multiline signal" provides strong spectral evidence for a tetranuclear Mn origin for the g = 4 signal and is strongly suggestive of a model in which different spin state configurations of a single exchange-coupled Mn cluster give rise to the g = 4 and g = 2 multiline signals. A simulation shows the observed spectrum to be consistent with an S = 3/2 or S = 5/2 state of a tetranuclear Mn complex. The resolution of hyperfine structure on the NH3-modified g = 4 signal is strongly dependent on sample orientation, with no resolved hyperfine structure when the membrane normal is oriented perpendicular to the applied magnetic field. The dramatic NH3-induced changes in the g = 4 signal resolved in the spectra of oriented samples are suggestive that NH3 binding at the Cl- site of the OEC may represent direct coordination of NH3 to the Mn cluster. Orientation dependence data on the g = 2 multiline signal show that the hyperfine transitions in the wings of the signal are anisotropic. These peaks remain unresolved in the powder spectrum of the g = 2 multiline signal. The g tensor for the g = 2 multiline signal may be more anisotropic than previously thought. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BEREICH CHEM BIODYNAM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. NR 34 TC 74 Z9 74 U1 1 U2 16 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD JAN 21 PY 1992 VL 31 IS 2 BP 541 EP 547 DI 10.1021/bi00117a034 PG 7 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA HA993 UT WOS:A1992HA99300034 PM 1310041 ER PT J AU BOHR, J GIBBS, D SINHA, SK KRATSCHMER, W VANTENDELOO, G LARSEN, E EGSGAARD, H BERMAN, LE AF BOHR, J GIBBS, D SINHA, SK KRATSCHMER, W VANTENDELOO, G LARSEN, E EGSGAARD, H BERMAN, LE TI ORDER, DISORDER AND STRUCTURE OF CRYSTALS OF C60/C70 SO EUROPHYSICS LETTERS LA English DT Article DE X-RAY DETERMINATION OF STRUCTURES; SPECIFIC STRUCTURE OF ELEMENTS AND ALLOYS ID CARBON; C-60 AB Single crystals with two different morphologies, black and brown, of C60 with about 12% C70 have been studied by synchrotron X-ray diffraction. Integrated intensities from 8 reflections show that the charge distribution of the C60 cluster is shell-like giving rise to an oscillatory behaviour in the diffracted intensities. From the intensities, the distance between diametrically opposite carbon atoms has been determined to be (7.24 +/- 0.22) angstrom. The thickness of the charge distribution of the shell can be estimated as 3.06 angstrom and the cavity within a C60 cluster to have a diameter of about 4.18 angstrom. The finite longitudinal width of the diffraction peaks from black crystals indicates a lack of long-range crystalline order. The rocking curves are about 7-degrees broad and depict an unusually smooth behaviour. This may be indicative of a glassy or hexatic phase. High-resolution electron microscopy allows small crystallites with a relatively well-defined orientation relationship to be identified. In contrast, brown crystals have long-range order. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. MAX PLANCK INST NUCL PHYS,W-6900 HEIDELBERG 1,GERMANY. ANTWERP STATE UNIV CTR,B-2020 ANTWERP,BELGIUM. RP BOHR, J (reprint author), RISO NATL LAB,DK-4000 ROSKILDE,DENMARK. RI Bohr, Jakob/A-5819-2012 OI Bohr, Jakob/0000-0003-4076-2045 NR 15 TC 15 Z9 15 U1 2 U2 8 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD JAN 21 PY 1992 VL 17 IS 4 BP 327 EP 332 DI 10.1209/0295-5075/17/4/008 PG 6 WC Physics, Multidisciplinary SC Physics GA GV542 UT WOS:A1992GV54200008 ER PT J AU BURNS, TP AF BURNS, TP TI ADAPTEDNESS, EVOLUTION AND A HIERARCHICAL CONCEPT OF FITNESS SO JOURNAL OF THEORETICAL BIOLOGY LA English DT Article ID POPULATION-GROWTH RATE; EXTINCTION; SELECTION; PATTERNS RP BURNS, TP (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831, USA. NR 51 TC 5 Z9 5 U1 0 U2 2 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-5193 J9 J THEOR BIOL JI J. Theor. Biol. PD JAN 21 PY 1992 VL 154 IS 2 BP 219 EP 237 DI 10.1016/S0022-5193(05)80404-7 PG 19 WC Biology; Mathematical & Computational Biology SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational Biology GA HC682 UT WOS:A1992HC68200005 PM 1573906 ER PT J AU NELSON, SC HAIRE, MJ SCHRYVER, JC AF NELSON, SC HAIRE, MJ SCHRYVER, JC TI NETWORK-SIMULATION MODELING OF INTERACTIONS BETWEEN MAINTENANCE AND PROCESS SYSTEMS SO PROCEEDINGS ANNUAL RELIABILITY AND MAINTAINABILITY SYMPOSIUM LA English DT Article; Proceedings Paper CT 1992 ANNUAL SYMP ON RELIABILITY AND MAINTAINABILITY CY JAN 21-23, 1992 CL LAS VEGAS, NV SP IEEE, INST IND ENGINEERS, AMER SOC QUAL CONTROL, SYSTEM SAFETY SOC, SOC RELIAB ENGINEERS, SOC LOGIST ENGINEERS DE SIMULATION MODEL; ROBOTICS; RELIABILITY MODEL; AVAILABILITY MODEL; NETWORK-SIMULATION MODEL AB Network simulation modeling can be an important tool for reliability and maintainability (R & M) assessments. The technique is described in some detail in this paper. As an example application, network simulation modeling is used to evaluate the adequacy of the maintenance system of a nuclear fuel processing plant: The interaction between the maintenance and chemical process systems is modeled using a Monte-Carlo sampling procedure for treating failure and repair events. It is concluded in the example problem that at least two mobile manipulators (MM) and one through-the-wall manipulator (TTWM) equipment are needed to maintain a facility of this particular design. RP NELSON, SC (reprint author), OAK RIDGE NATL LAB,DIV ENGN TECHNOL,BLDG 7601,MS 6305,POB 2008,OAK RIDGE,TN 37831, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0149-144X J9 P ANNU REL MAINT SYM JI Proc. Annu. Reliab. Maintainab. Symp. PD JAN 21 PY 1992 IS SYM BP 150 EP 156 DI 10.1109/ARMS.1992.187815 PG 7 WC Engineering, Multidisciplinary; Engineering, Industrial SC Engineering GA HQ114 UT WOS:A1992HQ11400025 ER PT J AU JARRELL, DB STRATTON, RC AF JARRELL, DB STRATTON, RC TI THE EFFECTS OF ROOT-CAUSE ANALYSIS ON THE UTILITY RESOURCE BALANCE SO PROCEEDINGS ANNUAL RELIABILITY AND MAINTAINABILITY SYMPOSIUM LA English DT Article; Proceedings Paper CT 1992 ANNUAL SYMP ON RELIABILITY AND MAINTAINABILITY CY JAN 21-23, 1992 CL LAS VEGAS, NV SP IEEE, INST IND ENGINEERS, AMER SOC QUAL CONTROL, SYSTEM SAFETY SOC, SOC RELIAB ENGINEERS, SOC LOGIST ENGINEERS DE RELIABILITY CENTERED MAINTENANCE; ROOT-CAUSE ANALYSIS METHODOLOGY; FAILURE MITIGATION; ARTIFICIAL INTELLIGENCE; DEGRADATION MECHANISMS; RESOURCE MANAGEMENT AB Root cause analysis (RCA) is not new to the utility industry. While good RCA is essential to the effective mitigation of plant performance degradation, regulatory or managerial misinterpretation of RCA results can have a deleterious effect on the focus of critical operations and maintenance resources. The lack of a uniform methodology for performing and documenting RCA has, in some cases, resulted in an inappropriate response to a problematic symptom, while the real problem continues to erode plant productivity, safety and reliability. This paper describes the development of a model-based approach to the process of determining the root-cause of component failure in power plants. It defines the elements needed to analyze heat exchanger failure scenarios and generalizes the structure of the analytic and cause-linking processes to formulate a generic methodology. Case studies are cited that demonstrate the validity and necessity of this structured approach to determining the root cause Of component failure. The methodology described is being expanded and partially automated using artificial intelligence techniques to produce an operations and maintenance (O & M) decision support tool for plants which can guide the user in producing an accurate, fully documented analysis of component failure events. This will allow utility management, even with less experienced RCA investigation personnel, to effectively focus available O & M resources on the degradation mechanisms that affect the safety and productivity of a plant. RP JARRELL, DB (reprint author), PACIFIC NW LAB, MS K6-43, 3160 GEORGE WASHINGTON WAY, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0149-144X J9 P ANNU REL MAINT SYM JI Proc. Annu. Reliab. Maintainab. Symp. PD JAN 21 PY 1992 IS SYM BP 171 EP 176 DI 10.1109/ARMS.1992.187818 PG 6 WC Engineering, Multidisciplinary; Engineering, Industrial SC Engineering GA HQ114 UT WOS:A1992HQ11400028 ER PT J AU WOLPERT, D AF WOLPERT, D TI DRAWING THE LINE SO CHEMISTRY & INDUSTRY LA English DT Note RP WOLPERT, D (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87544, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SOC CHEMICAL INDUSTRY PI LONDON PA 14 BELGRAVE SQUARE, LONDON, ENGLAND SW1X 8PS SN 0009-3068 J9 CHEM IND-LONDON JI Chem. Ind. PD JAN 20 PY 1992 IS 2 BP 72 EP 72 PG 1 WC Chemistry, Applied SC Chemistry GA HA600 UT WOS:A1992HA60000010 ER PT J AU YOST, MG LIBURDY, RP AF YOST, MG LIBURDY, RP TI TIME-VARYING AND STATIC MAGNETIC-FIELDS ACT IN COMBINATION TO ALTER CALCIUM SIGNAL TRANSDUCTION IN THE LYMPHOCYTE SO FEBS LETTERS LA English DT Article DE SIGNAL TRANSDUCTION; CALCIUM SIGNALING; ELECTROMAGNETIC FIELD; MITOGEN ACTIVATION; LYMPHOCYTE ID CYCLOTRON-RESONANCE; ELECTROMAGNETIC-FIELDS; ACTIVATION; EXPOSURE; INVITRO; CELLS; MODEL; IONS; HZ AB We have tested the hypothesis that extremely low frequency (ELF) time-varying magnetic fields act in combination with static magnetic fields to alter calcium signalling in the lymphocyte. Results indicate that a 60-min exposure of thymic lymphocytes at 37 +/- 0.05-degrees-C to a 16 Hz, 421 mG (42.1-mu-T) magnetic field simultaneously with a colinear static magnetic field of 234 mG (23.4-mu-T) (a.c./d.c. field intensity ratio = 1.8) inhibits calcium influx triggered by the mitogen Concanavalin A. Significantly, resting lymphocytes do not respond to the fields, thus, only mitogen-activated cells undergoing calcium signalling exhibit a field response. These results indicate that signal transduction involving calcium is an important biological constraint which operates to mediate this field interaction. Additional split field exposures show that the presence of the a.c. field or the d.c. field alone does not produce an effect. This is consistent with a proposed parametric resonance theory of interaction of low intensity magnetic fields with biological systems (L. L. Lednev (1991) Bioelectromagnetics 12, 71-75), which predicts the occurrence of biological effects at specific values for the frequency and field intensity of the ELF and static magnetic fields. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV RES MED & RADIAT BIOPHYS,BERKELEY,CA 94720. UNIV CALIF BERKELEY,SCH PUBL HLTH,BERKELEY,CA 94720. NR 23 TC 109 Z9 112 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0014-5793 J9 FEBS LETT JI FEBS Lett. PD JAN 20 PY 1992 VL 296 IS 2 BP 117 EP 122 DI 10.1016/0014-5793(92)80361-J PG 6 WC Biochemistry & Molecular Biology; Biophysics; Cell Biology SC Biochemistry & Molecular Biology; Biophysics; Cell Biology GA HA637 UT WOS:A1992HA63700001 PM 1733766 ER PT J AU ETELANIEMI, V HAMALAINEN, K MANNINEN, S SUORTTI, P AF ETELANIEMI, V HAMALAINEN, K MANNINEN, S SUORTTI, P TI XANES SPECTROSCOPY USING HIGH-RESOLUTION RESONANT RAMAN-SCATTERING - APPLICATION TO HOLMIUM SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID X-RAY SPECTROMETER; ABSORPTION; IRON AB The use of resonant Raman scattering at x-ray energies for studies of the near-edge structure of the absorption edge is presented. The potential of the method is shown in the case of the Ho L(III)-edge, which is measured using Cu K-alpha-1 radiation and a focusing crystal spectrometer. The results are interpreted within a model where the density of final electron states is constant plus a narrow band where the density is high (white line). A comparison with the other methods used in x-ray absorption near-edge structure spectroscopy is also given. C1 BROOKHAVEN NATL LAB,NSLS,UPTON,NY 11973. ESRF,F-38043 GRENOBLE,FRANCE. RP ETELANIEMI, V (reprint author), UNIV HELSINKI,DEPT PHYS,SF-00100 HELSINKI 10,FINLAND. RI Hamalainen, Keijo/A-3986-2010 OI Hamalainen, Keijo/0000-0002-9234-9810 NR 20 TC 11 Z9 11 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD JAN 20 PY 1992 VL 4 IS 3 BP 879 EP 886 DI 10.1088/0953-8984/4/3/027 PG 8 WC Physics, Condensed Matter SC Physics GA HA951 UT WOS:A1992HA95100027 ER PT J AU GREEN, PF RUSSELL, TP AF GREEN, PF RUSSELL, TP TI ADSORPTION OF COPOLYMER CHAINS FROM A MELT ONTO A FLAT SURFACE SO MACROMOLECULES LA English DT Article ID BLOCK COPOLYMERS; INTERFACES; HOMOPOLYMERS; DIFFUSION; POLYMERS AB We have investigated the segregation of symmetric polystyrene-poly(methyl methacrylate) (PS-PMMA) diblock copolymers at interfaces formed between different polymer melts and flat, impenetrable surfaces using elastic recoil detection (ERD). Situations in which the copolymers were allowed to adsorb onto silicon (Si) from PS melts of varying degrees of polymerization, P, were examined. Over the range of concentrations studied, the excess copolymer chains per unit area at the interface, phi*(0), was found to be independent of P, for P > N(c), where N(c) is the degree of polymerization of the copolymer chains. At very low concentrations, phi*(0) exhibited a strong linear dependence on phi(0), the equilibrium volume fraction of chains in the bulk of the homopolymer. For phi(c) greater-than-or-equal-to 0.012 (phi*(0) almost-equal-to 42 angstrom), phi*(0) became virtually independent of phi(c). This value of phi(0) corresponded to the interface excess at which the Si surface became saturated with PMMA segments. The energy of interaction between a copolymer chain and the surface was determined to be of order k(B)T. Interfacial segregation of the copolymers was not observed when the homopolymer host was PMMA, poly(vinyl chloride), or a blend of PS and poly(phenylene oxide). No segregation of the copolymers was observed at PS/gold interfaces. On the other hand, segregation of the PS-PMMA copolymers at PS/Al interfaces was very strong. C1 IBM CORP,ALMADEN RES CTR,SAN JOSE,CA 95120. RP GREEN, PF (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 35 TC 35 Z9 35 U1 1 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD JAN 20 PY 1992 VL 25 IS 2 BP 783 EP 787 DI 10.1021/ma00028a043 PG 5 WC Polymer Science SC Polymer Science GA HB418 UT WOS:A1992HB41800043 ER PT J AU SJOREEN, TP JEBASINSKI, R SCHMIDT, K MANTL, S HOLZBRECHER, H SPEIER, W AF SJOREEN, TP JEBASINSKI, R SCHMIDT, K MANTL, S HOLZBRECHER, H SPEIER, W TI FORMATION OF COSI2 IN SIMOX WAFERS BY HIGH-DOSE COBALT IMPLANTATION SO MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY LA English DT Article ID MOLECULAR-IONS; BURIED COSI2; LAYERS; OXYGEN AB SIMOX (separation by implanted oxygen) wafers were implanted with high doses of cobalt and annealed at high temperatures in order to study the formation of buried single-crystal CoSi2 layers in this material. For this study SIMOX wafers of (100) oriented silicon were implanted at 100-200 keV with doses of 1.2-2.0 x 10(17) Co+ cm-2, and annealed in a rapid thermal processor or tube furnace. As-implanted and annealed samples were analyzed by Rutherford backscattering with channeling spectroscopy (RBS), cross-sectional transmission electron microscopy (XTEM), secondary ion mass spectroscopy, and the van der Pauw technique. The best buried CoSi2 layers were obtained at an implantation energy of 100 keV and by subsequent rapid thermal annealing. RBS minimum yields of approximately 6% were obtained for the buried layer, which is the same as that reported for bulk (100) silicon. The measured resistivity of 15-mu-OMEGA cm and XTEM confirmed the continuity of the layer. Buried CoSi2 layers were successfully produced up to an implantation energy of 180 keV. However, as the energy was increased the quality of the CoSi2 layer degraded, with minimum yields increasing to 24% at 180 keV, and with a corresponding degradation in the minimum yields in the top silicon layer. At 200 keV a buried epitaxial layer was not produced. The degradation of crystal quality with ion implantation energy and the failure to produce a buried layer at 200 keV are discussed. C1 FORSCHUNGSZENTRUM JULICH, ZENT ABT CHEM ANAL, W-5170 JULICH 1, GERMANY. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. RP SJOREEN, TP (reprint author), FORSCHUNGSZENTRUM JULICH, INST SCHICHT & IONENTECH, POSTFACH 1913, W-5170 JULICH 1, GERMANY. RI Mantl, Siegfried/L-1317-2013; OI Mantl, Siegfried/0000-0002-4266-0619; Speier, Wolfgang/0000-0002-3900-6931 NR 11 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5107 J9 MAT SCI ENG B-SOLID JI Mater. Sci. Eng. B-Solid State Mater. Adv. Technol. PD JAN 20 PY 1992 VL 12 IS 1-2 BP 129 EP 133 DI 10.1016/0921-5107(92)90272-B PG 5 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HE158 UT WOS:A1992HE15800025 ER PT J AU BATKO, G RANDRUP, J VETTER, T AF BATKO, G RANDRUP, J VETTER, T TI N-BODY COLLISIONS IN HIGH-ENERGY NUCLEAR-REACTIONS SO NUCLEAR PHYSICS A LA English DT Article ID HEAVY-ION COLLISIONS; KAON PRODUCTION; FLOW; EQUILIBRATION; EQUATION; DYNAMICS; MODEL; STATE AB We study the effect of many-body collisions in simulations of nuclear dynamics. First, for elastic three-nucleon processes, the simplest pion-exchange diagrams are calculated and the ensuing scattering amplitude is used in a schematic calculation illustrating the evolution in momentum space. Then the collision integral in the BUU model is generalized to include many-body collisions. The number of baryons involved in a given collision is determined on the basis of the energy-dependent binary interaction range and their energy is shared microcanonically. This leads to a general treatment of N-body scattering (both elastic and inelastic) that can easily be incorporated into existing BUU codes. We study a variety of experimental observables, for the case of Ca + Ca at bombarding energies of 200-1000 MeV per nucleon, such as anisotropy, flow angle, sidewards momentum, and backwards yield. The treatment is subsequently extended to include particle production and the production of kaons is especially considered. Overall, the results of the standard BUU model are affected relatively little by the incorporation of N-body collisions. RP BATKO, G (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720, USA. NR 42 TC 29 Z9 29 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 20 PY 1992 VL 536 IS 3-4 BP 786 EP 822 DI 10.1016/0375-9474(92)90124-3 PG 37 WC Physics, Nuclear SC Physics GA HF085 UT WOS:A1992HF08500016 ER PT J AU ALLIEGRO, C CAMPAGNARI, C CHALOUPKA, V COOPER, PS EGGER, J GORDON, HA HADLEY, NJ HEROLD, WD KASPAR, H LEE, AM LAZARUS, DM LUBATTI, HJ REHAK, P ZELLER, ME ZHAO, T AF ALLIEGRO, C CAMPAGNARI, C CHALOUPKA, V COOPER, PS EGGER, J GORDON, HA HADLEY, NJ HEROLD, WD KASPAR, H LEE, AM LAZARUS, DM LUBATTI, HJ REHAK, P ZELLER, ME ZHAO, T TI STUDY OF THE DECAY K+-]PI+E+E- SO PHYSICAL REVIEW LETTERS LA English DT Article ID RADIATIVE-CORRECTIONS; DISTANCE; SEARCH; MODEL AB We present results of an experiment in which approximately 500 events of the decay K + --> pi+ e+ e-were observed. We have measured the branching ratio for K(pi-ee)+ to be (2.75 +/- 0.23 +/- 0.13) x 10(-7) assuming a vector interaction with a form factor of lambda = 0.105 +/- 0.035 +/- 0.015. We have also found the branching ratio times decay probability for K + --> pi+ X0, X0 --> e+ e- to be less than 1.5 x 10(-8) (99% C. L.) over an X0 invariant mass range from 150 to 340 MeV/c2. C1 FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. SWISS INST NUCL RES,PAUL SCHERRER INST,CH-5234 VILLIGEN,SWITZERLAND. UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195. YALE UNIV,DEPT PHYS,NEW HAVEN,CT 06511. RP ALLIEGRO, C (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 25 TC 56 Z9 56 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 20 PY 1992 VL 68 IS 3 BP 278 EP 281 DI 10.1103/PhysRevLett.68.278 PG 4 WC Physics, Multidisciplinary SC Physics GA GZ967 UT WOS:A1992GZ96700007 ER PT J AU COFFMAN, D DEJONGH, F DUBOIS, GP EIGEN, G HITLIN, DG MATTHEWS, CG RICHMAN, J WEINSTEIN, AJ WISNIEWSKI, WJ ZHU, Y BOLTON, T BUNNELL, KO CASSELL, RE COWARD, DH KIM, PC LABS, J ODIAN, A PITMAN, D SCHINDLER, RH TOKI, W WASSERBAECH, S DRINKARD, JJ GATTO, C HEUSCH, CA LOCKMAN, WS SADROZINSKI, HFW SCARLATELLA, M SCHALK, TL SEIDEN, A XU, R EISENSTEIN, BI FREESE, T GLADDING, G IZEN, JM STOCKDALE, IE TRIPSAS, B MALLIK, U WANG, MZ BROWN, JS BURNETT, TH LI, AD MIR, R MOCKETT, PM NEMATI, B PARRISH, L WILLUTZKI, H AF COFFMAN, D DEJONGH, F DUBOIS, GP EIGEN, G HITLIN, DG MATTHEWS, CG RICHMAN, J WEINSTEIN, AJ WISNIEWSKI, WJ ZHU, Y BOLTON, T BUNNELL, KO CASSELL, RE COWARD, DH KIM, PC LABS, J ODIAN, A PITMAN, D SCHINDLER, RH TOKI, W WASSERBAECH, S DRINKARD, JJ GATTO, C HEUSCH, CA LOCKMAN, WS SADROZINSKI, HFW SCARLATELLA, M SCHALK, TL SEIDEN, A XU, R EISENSTEIN, BI FREESE, T GLADDING, G IZEN, JM STOCKDALE, IE TRIPSAS, B MALLIK, U WANG, MZ BROWN, JS BURNETT, TH LI, AD MIR, R MOCKETT, PM NEMATI, B PARRISH, L WILLUTZKI, H TI DIRECT MEASUREMENT OF THE J/PSI LEPTONIC BRANCHING FRACTION SO PHYSICAL REVIEW LETTERS LA English DT Article ID ANNIHILATION; DECAYS AB The Mark III Collaboration has measured the J/psi leptonic branching fractions using the process psi(2S) --> pi+ pi- J/psi, J/psi --> l+ l-. The results are B(J/psi --> e+ e-) = (5.92 +/- 0.15 +/- 0.20)% and B(J/psi --> mu+ mu-) = (5.90 +/- 0.15 +/- 0.19)%, where the first error is statistical and the second is systematic. Assuming lepton universality, the leptonic branching fraction of the J/psi is (5.91 +/- 0.11 +/- 0.20)%. This result is used to obtain the strong coupling constant alpha(s) and the QCD scale factor LAMBDA(MSBAR) (MSBAR denotes the modified minimal subtraction scheme). C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305. UNIV CALIF SANTA CRUZ,SANTA CRUZ,CA 95064. UNIV ILLINOIS,URBANA,IL 61801. UNIV WASHINGTON,SEATTLE,WA 98195. UNIV IOWA,IOWA CITY,IA 52242. RP COFFMAN, D (reprint author), CALTECH,PASADENA,CA 91125, USA. NR 10 TC 27 Z9 27 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 20 PY 1992 VL 68 IS 3 BP 282 EP 285 DI 10.1103/PhysRevLett.68.282 PG 4 WC Physics, Multidisciplinary SC Physics GA GZ967 UT WOS:A1992GZ96700008 ER PT J AU SORGE, H MATTIELLO, R STOCKER, H GREINER, W AF SORGE, H MATTIELLO, R STOCKER, H GREINER, W TI ENERGY AND BARYON FLOW IN NUCLEAR COLLISIONS AT 15A GEV SO PHYSICAL REVIEW LETTERS LA English DT Article ID DYNAMICS; MATTER AB Strong correlations between baryon stopping in the projectile rapidity hemisphere and target excitation have been found in the light-ion-induced reactions at the BNL Alternating Gradient Synchrotron (AGS) (E814 group). Results in the framework of the relativistic molecular dynamics approach (RQMD) describe recent E814 data quite well. We discuss the RQMD results together with proton and pion data from the E802 group near midrapidity. They have raised the question of whether partial transparency could be seen in these AGS experiments. The RQMD results indicate strong transverse baryon flow in central Si + Au collisions after the projectile has been stopped in the target. C1 UNIV FRANKFURT,W-6000 FRANKFURT,GERMANY. RP SORGE, H (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. RI Stoecker, Horst/D-6173-2013 OI Stoecker, Horst/0000-0002-3282-3664 NR 19 TC 32 Z9 32 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 20 PY 1992 VL 68 IS 3 BP 286 EP 289 DI 10.1103/PhysRevLett.68.286 PG 4 WC Physics, Multidisciplinary SC Physics GA GZ967 UT WOS:A1992GZ96700009 ER PT J AU SESSLER, AM WHITTUM, DH YU, LH AF SESSLER, AM WHITTUM, DH YU, LH TI RADIOFREQUENCY BEAM CONDITIONER FOR FAST-WAVE FREE-ELECTRON GENERATORS OF COHERENT RADIATION SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-GAIN REGIME; LASER; FIELDS AB A method for conditioning electron beams is proposed to enhance gain in resonant electron-beam devices by introducing a correlation between betatron amplitude and energy. This correlation reduces the axial-velocity spread within the beam, and thereby eliminates an often severe constraint on beam emittance. Free-electron-laser performance with a conditioned beam is examined and analysis is performed of a conditioner consisting of a periodic array of FODO channels and idealized microwave cavities excited in the TM210 mode. Numerical examples are discussed. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. RP SESSLER, AM (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 21 TC 51 Z9 51 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 20 PY 1992 VL 68 IS 3 BP 309 EP 312 DI 10.1103/PhysRevLett.68.309 PG 4 WC Physics, Multidisciplinary SC Physics GA GZ967 UT WOS:A1992GZ96700015 ER PT J AU WOICIK, JC KENDELEWICZ, T MIYANO, KE COWAN, PL BOULDIN, CE KARLIN, BA PIANETTA, P SPICER, WE AF WOICIK, JC KENDELEWICZ, T MIYANO, KE COWAN, PL BOULDIN, CE KARLIN, BA PIANETTA, P SPICER, WE TI X-RAY STANDING-WAVE DETERMINATION OF THE CLEAN INP(110) SURFACE RECONSTRUCTION SO PHYSICAL REVIEW LETTERS LA English DT Article ID SYNCHROTRON RADIATION BEAMLINE; HIGH-ENERGY-RESOLUTION; SILICON 111 SURFACE; SEMICONDUCTORS AB The x-ray standing-wave technique through detection of surface-sensitive Auger electrons has determined the surface reconstruction of clean InP(110). Using the back-reflection diffraction geometry from (220) planes, we find the perpendicular displacements of the surface P and In atoms to be +0.18 +/- 0.1 and -0.48 +/- 0.08 angstrom, respectively, from their unrelaxed bulk positions. The use of low-energy x rays combined with a novel method of data analysis opens the general problem of surface reconstruction to study by this technique. C1 BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE,UPTON,NY 11973. STANFORD UNIV,STANFORD ELECTR LABS,STANFORD,CA 94305. RP WOICIK, JC (reprint author), NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899, USA. NR 20 TC 42 Z9 42 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 20 PY 1992 VL 68 IS 3 BP 341 EP 344 DI 10.1103/PhysRevLett.68.341 PG 4 WC Physics, Multidisciplinary SC Physics GA GZ967 UT WOS:A1992GZ96700023 ER PT J AU ACEVES, A HOLM, DD KOVACIC, G AF ACEVES, A HOLM, DD KOVACIC, G TI CHAOTIC DYNAMICS DUE TO COMPETITION AMONG DEGENERATE MODES IN A RING-CAVITY LASER SO PHYSICS LETTERS A LA English DT Article ID INSTABILITIES AB Competition between two degenerate spatial modes in a ring-cavity laser is shown to lead to chaotic time evolution of their amplitudes. Analysis of this temporal chaos implies that the laser output will show randomly intermittent bursts of apparent spatial complexity due to interference between the two competing modes. C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP ACEVES, A (reprint author), UNIV NEW MEXICO,DEPT MATH & STAT,ALBUQUERQUE,NM 87131, USA. OI Holm, Darryl D/0000-0001-6362-9912 NR 7 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 J9 PHYS LETT A JI Phys. Lett. A PD JAN 20 PY 1992 VL 161 IS 6 BP 499 EP 505 DI 10.1016/0375-9601(92)91081-2 PG 7 WC Physics, Multidisciplinary SC Physics GA HD629 UT WOS:A1992HD62900006 ER PT J AU GANG, FY SIGMAR, DJ LEBOEUF, JN AF GANG, FY SIGMAR, DJ LEBOEUF, JN TI SATURATION OF ENERGETIC PARTICLE DRIVEN ALFVEN-WAVE INSTABILITY THROUGH VELOCITY SPACE DIFFUSION SO PHYSICS LETTERS A LA English DT Article AB It is demonstrated both numerically and analytically that the energetic particle driven Alfven wave instability saturates when the Alfven wave fluctuations are still quasi-coherent. The saturation is due to particle velocity space diffusion which steepens the velocity gradient of the resonant particles, thereby enhancing wave damping (Landau damping). C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37830. RP GANG, FY (reprint author), MIT,CTR PLASMA FUS,CAMBRIDGE,MA 02139, USA. NR 8 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 J9 PHYS LETT A JI Phys. Lett. A PD JAN 20 PY 1992 VL 161 IS 6 BP 517 EP 522 DI 10.1016/0375-9601(92)91084-5 PG 6 WC Physics, Multidisciplinary SC Physics GA HD629 UT WOS:A1992HD62900009 ER PT J AU EVANS, RW AF EVANS, RW TI INCENTIVES FOR ORGAN DONATION SO LANCET LA English DT Letter RP EVANS, RW (reprint author), BATTELLE SEATTLE RES CTR,SEATTLE,WA 98105, USA. NR 9 TC 6 Z9 6 U1 0 U2 1 PU LANCET LTD PI LONDON PA 42 BEDFORD SQUARE, LONDON, ENGLAND WC1B 3SL SN 0140-6736 J9 LANCET JI Lancet PD JAN 18 PY 1992 VL 339 IS 8786 BP 185 EP 185 DI 10.1016/0140-6736(92)90254-Z PG 1 WC Medicine, General & Internal SC General & Internal Medicine GA GZ968 UT WOS:A1992GZ96800044 PM 1346042 ER PT J AU VANDENHOEK, G THOMAN, JW CHANDLER, DW STOLTE, S AF VANDENHOEK, G THOMAN, JW CHANDLER, DW STOLTE, S TI REMPI SPECTROSCOPY OF CF3I IN THE BULK AND IN A MOLECULAR-BEAM SO CHEMICAL PHYSICS LETTERS LA English DT Article ID MULTI-PHOTON IONIZATION; MULTIPHOTON IONIZATION; SPECTRA; STATES; PHOTODISSOCIATION; PHOTOIONIZATION; AMMONIA; BANDS; NH3 AB Electronically excited states of CF3I have been investigated using resonance-enhanced multi-photon ionization. The electronic C band was examined by tuning the laser wavelength from 340 to 355 nm. Vibrational modes (nu-1, nu-2, nu-3) in this band were observed and their band origin was measured. The experiments were performed both in a thermal gas of pure CF3I and in a supersonic molecular beam in order to reduce the hot bands. C1 WILLIAMS COLL, DEPT CHEM, WILLIAMSTOWN, MA 01267 USA. SANDIA NATL LABS, COMBUST RES FACIL, LIVERMORE, CA 94550 USA. FREE UNIV AMSTERDAM, CTR LASER, 1081 HV AMSTERDAM, NETHERLANDS. RP VANDENHOEK, G (reprint author), CATHOLIC UNIV NIJMEGEN, DEPT PHYS, 6525 ED NIJMEGEN, NETHERLANDS. NR 28 TC 10 Z9 10 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 EI 1873-4448 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD JAN 17 PY 1992 VL 188 IS 5-6 BP 413 EP 418 DI 10.1016/0009-2614(92)80839-4 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HC636 UT WOS:A1992HC63600008 ER PT J AU FERRIS, KF FRANZ, JA SOSA, C BARTLETT, RJ AF FERRIS, KF FRANZ, JA SOSA, C BARTLETT, RJ TI ALKYL RADICAL DISPLACEMENT-REACTIONS AT SULFUR - ON THE QUESTION OF INTERMEDIACY IN ALKYLSULFURANYL RADICALS SO JOURNAL OF ORGANIC CHEMISTRY LA English DT Note ID MOLECULAR-ORBITAL METHODS; ELECTRON CORRELATION; PERTURBATION-THEORY; MODEL C1 UNIV FLORIDA, QUANTUM THEORY PROJECT, GAINESVILLE, FL 32611 USA. RP FERRIS, KF (reprint author), PACIFIC NW LAB, RICHLAND, WA 99353 USA. RI Bartlett, Rodney/F-6781-2011 OI Bartlett, Rodney/0000-0003-3865-9639 NR 21 TC 35 Z9 35 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3263 J9 J ORG CHEM JI J. Org. Chem. PD JAN 17 PY 1992 VL 57 IS 2 BP 777 EP 778 DI 10.1021/jo00028a076 PG 2 WC Chemistry, Organic SC Chemistry GA HA466 UT WOS:A1992HA46600076 ER PT J AU WASSERMAN, EP MOORE, CB BERGMAN, RG AF WASSERMAN, EP MOORE, CB BERGMAN, RG TI GAS-PHASE RATES OF ALKANE C-H OXIDATIVE ADDITION TO A TRANSIENT CPRH(CO) COMPLEX SO SCIENCE LA English DT Article ID UNSATURATED METAL CENTERS; RESOLVED IR SPECTROSCOPY; CARBON HYDROGEN-BONDS; INFRARED-SPECTROSCOPY; ORGANOMETALLIC CHEMISTRY; ETA-2-ALKANE COMPLEXES; MATRIX PHOTOCHEMISTRY; LIQUID XENON; LIGAND BOND; ACTIVATION AB The gas-phase irradiation of CpRh(CO)2 (Cp = eta-5-C5H5) was examined in order to study the rates of reaction of the 16-electron intermediates presumed to bc involved in the C-H oxidative addition of alkanes. "Naked" (unsolvated) CpRh(CO) was detected, and direct measurements of the rates of reaction of this very short-lived complex with alkane C-H bonds were made. Activation of C-H bonds occurs on almost every collision for alkanes of moderate size, and intermediates in which the alkanes are bound to the metal centers, without their C-H bonds being fully broken, are implicated as intermediates in the overall reaction. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT & CHEM SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. NR 43 TC 140 Z9 140 U1 1 U2 19 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD JAN 17 PY 1992 VL 255 IS 5042 BP 315 EP 318 DI 10.1126/science.255.5042.315 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA GZ695 UT WOS:A1992GZ69500037 PM 17779581 ER PT J AU BOW, WJ KING, AS LEE, CE AF BOW, WJ KING, AS LEE, CE TI SCATTERING FROM FINITE ARRAY OF MICROSTRIP PATCHES ON UNIAXIAL SUBSTRATE SO ELECTRONICS LETTERS LA English DT Article DE MICROSTRIP; ANTENNAS; SCATTERING AB The problem of plane wave scattering by a finite size array of rectangular microstrip patches printed on a uniaxially anisotropic substrate is considered. Computed radar cross-section data for microstrip patch antenna arrays are presented as a function of array size, incident signal frequency, and anisotropy. RP BOW, WJ (reprint author), SANDIA NATL LABS,EXPLORATORY SYST DEV,DIV 1,ALBUQUERQUE,NM 87185, USA. NR 7 TC 1 Z9 1 U1 0 U2 0 PU IEE-INST ELEC ENG PI HERTFORD PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD, ENGLAND SG1 2AY SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD JAN 16 PY 1992 VL 28 IS 2 BP 126 EP 127 DI 10.1049/el:19920078 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA HA946 UT WOS:A1992HA94600015 ER PT J AU SCHWARTZ, SE AF SCHWARTZ, SE TI HIT OR MISS SO NATURE LA English DT Letter RP SCHWARTZ, SE (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. RI Schwartz, Stephen/C-2729-2008 OI Schwartz, Stephen/0000-0001-6288-310X NR 1 TC 0 Z9 0 U1 0 U2 0 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD JAN 16 PY 1992 VL 355 IS 6357 BP 196 EP 196 DI 10.1038/355196b0 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA GZ694 UT WOS:A1992GZ69400022 ER PT J AU MOTTONEN, J STRAND, A SYMERSKY, J SWEET, RM DANLEY, DE GEOGHEGAN, KF GERARD, RD GOLDSMITH, EJ AF MOTTONEN, J STRAND, A SYMERSKY, J SWEET, RM DANLEY, DE GEOGHEGAN, KF GERARD, RD GOLDSMITH, EJ TI STRUCTURAL BASIS OF LATENCY IN PLASMINOGEN-ACTIVATOR INHIBITOR-1 SO NATURE LA English DT Article ID HUMAN ALPHA-1-PROTEINASE INHIBITOR; CRYSTAL-STRUCTURE; SERPINS; ALPHA-1-ANTITRYPSIN; MODEL; ANTITHROMBIN; PLAKALBUMIN; REFINEMENT; OVALBUMIN; MUTANTS AB HuMAN plasminogen activator inhibitor-1 (PAI-1) 1,2 is the fast-acting inhibitor of tissue plasminogen activator and urokinase 3 and is a member of the serpin family of protease inhibitors 4. Serpins normally form complexes with their target proteases that dissociate very slowly as cleaved species and then fold into a highly stable inactive state 5 in which the residues that flank the scissile bond (P1 and P1'; ref. 6) are separated by about 70 angstrom (refs 7-9). PAI-1 also spontaneously folds into a stable 10 inactive state without cleavage; this state is termed 'latent' because inhibitory activity can be restored through denaturation and renaturation 2,10. Here we report the structure of intact latent PAI-1 determined by single-crystal X-ray diffraction to 2.6 angstrom resolution. The three-dimensional structure reveals that residues on the N-terminal side of the primary recognition site are inserted as a central strand of the largest beta-sheet, in positions similar to the corresponding residues in the cleaved form of the serpin alpha-1-proteinase inhibitor (alpha-1-PI) 7. Residues C-terminal to the recognition site occupy positions on the surface of the molecule distinct from those of the corresponding residues in cleaved serpins 7-9 or in the intact inactive serpin homologue, ovalbumin 11, and its cleavage product, plakal-bumin 12. The structure of latent PAI-1 is similar to one formed after cleavage in other serpins, and the stability of both latent PAI-1 and cleaved serpins may be derived from the same structural features 13,14. C1 UNIV TEXAS,SW MED CTR,DEPT BIOCHEM,5323 HARRY HINES BLVD,DALLAS,TX 75235. BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. PFIZER INC,DIV CENT RES,DEPT MOLEC GENET & PROT CHEM,GROTON,CT 06340. UNIV TEXAS,SW MED CTR,DEPT INTERNAL MED,DALLAS,TX 75235. NR 33 TC 505 Z9 513 U1 1 U2 9 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD JAN 16 PY 1992 VL 355 IS 6357 BP 270 EP 273 DI 10.1038/355270a0 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA GZ694 UT WOS:A1992GZ69400074 PM 1731226 ER PT J AU JADACH, S WARD, BFL AF JADACH, S WARD, BFL TI FINAL-STATE MULTIPLE PHOTON EFFECTS IN FERMION PAIR PRODUCTION AT SLC/LEP SO PHYSICS LETTERS B LA English DT Article AB We realize the rigorous Yennie-Frautschi-Suura theory for e+e- --> ffBAR + n(gamma), f not-equal e, via the Monte Carlo event generator YFS3 Fortran which includes both initial and final state multiple photon radiation. Sample numerical results for LEP/SLC energies are given in comparison to those of YFS2 Fortran, the pure initial state multiple photon MC event generator in wide use at SLC/LEP. Very high precision LEP/SLC experiments would be able to observe the effects of final state multiphoton radiation. C1 JAGELLONIAN UNIV,INST PHYS,PL-30059 KRAKOW 16,POLAND. UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. RP JADACH, S (reprint author), CERN,DIV THEORY,CH-1211 GENEVA 23,SWITZERLAND. NR 18 TC 55 Z9 55 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD JAN 16 PY 1992 VL 274 IS 3-4 BP 470 EP 472 DI 10.1016/0370-2693(92)92017-B PG 3 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HE342 UT WOS:A1992HE34200035 ER PT J AU LINDENBAUM, SJ LONGACRE, RS AF LINDENBAUM, SJ LONGACRE, RS TI COUPLED CHANNEL ANALYSIS OF J(PC)=0++ AND 2++ ISOSCALAR MESONS WITH MASSES BELOW 2.0 GEV SO PHYSICS LETTERS B LA English DT Article ID AMPLITUDE ANALYSIS; GEV-C; G(1590); PI AB A coupled channel analysis of the J(PC) = 0++ and 2++ channels below 2 GeV has been performed using Breit-Wigners considering pi-pi scattering amplitudes, J/psi radiative decay, and KKBAR --> KKBAR. The main conclusions were that a good fit with a minimum number of meson poles (four) was obtained in the 0++ channel. In our fit the f0 (170) was used to describe the first discovered S*' (1720) and the theta (1720) both of which have the same quantum numbers and parameters to a high probability. Unitarity effects which require a long-term effort were not included, however they are expected to have important effects primarily near thresholds and thus not affect the major conclusions of this paper. C1 CUNY CITY COLL,NEW YORK,NY 10031. RP LINDENBAUM, SJ (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 21 TC 76 Z9 77 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD JAN 16 PY 1992 VL 274 IS 3-4 BP 492 EP 497 DI 10.1016/0370-2693(92)92022-9 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HE342 UT WOS:A1992HE34200040 ER PT J AU ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T ALEKSEEV, GD ALLEN, P ALMEHED, S ALTED, F ALVSVAAG, SJ AMALDI, U ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B ASTIER, P AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATTAGLIA, M BATES, MJ BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELOUS, K BELTRAN, P BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIAGI, S BIANCHI, F BIBBY, JH BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M BONIVENTO, W BOOTH, PSL BORATAV, M BORGEAUD, P BORNER, H BOSIO, C BOTNER, O BOUQUET, B BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPAGNE, JE CAMPION, A CAMPORESI, T CANALE, V CAO, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAPKIN, M CHARPENTIER, P CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROSLAND, N CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DEMIN, A DERKAOUI, J DICIACCIO, L DIJKSTRA, H DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DULINSKI, W DZHELYADIN, R EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FALALEEV, V FASSOULIOTIS, D ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F FORSBACH, H FRANEK, B FRANSSON, KE FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GAGO, JM GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GLITZA, KW GOKIELI, R GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROS, MH GROSDIDIER, G GROSSETETE, B GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW HERBST, I HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D HYAMS, BD IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KANTARDJIAN, G KAPUSTA, F KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLIUTCHNIKOV, G KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KORZEN, B KOURKOUMELIS, C KREUZBERGER, T KROLIKOWSKI, J KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIKO, D LIEB, E LILLETHUN, E LINDGREN, J LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B LOKAJICEK, M LOKEN, JG AGUERA, MAL LOPEZFERNANDEZ, A LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUCOCK, R LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MALTEZOS, A MALTEZOS, S MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G MATVEEV, M MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MENICHETTI, E MERONI, C MEYER, WT MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MULLER, H MURRAY, WJ MYATT, G NARAGHI, F NAUKORZEN, U NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O PINSENT, A POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A PYYHTIA, J RADOJICIC, D RAGAZZI, S RANGE, WH RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R STUBENRAUCH, CJ SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O UVAROV, VA VALENTI, G VALLAZZA, E FERRER, JAV VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VANEIJNDHOVEN, N VANDERVELDE, C VARELA, J VAZ, P VEGNI, G VELASCO, J VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VIBERT, L VILANOVA, D VITALE, L VLASOV, EV VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J AF ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T ALEKSEEV, GD ALLEN, P ALMEHED, S ALTED, F ALVSVAAG, SJ AMALDI, U ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B ASTIER, P AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATTAGLIA, M BATES, MJ BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELOUS, K BELTRAN, P BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIAGI, S BIANCHI, F BIBBY, JH BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M BONIVENTO, W BOOTH, PSL BORATAV, M BORGEAUD, P BORNER, H BOSIO, C BOTNER, O BOUQUET, B BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPAGNE, JE CAMPION, A CAMPORESI, T CANALE, V CAO, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAPKIN, M CHARPENTIER, P CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROSLAND, N CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DEMIN, A DERKAOUI, J DICIACCIO, L DIJKSTRA, H DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DULINSKI, W DZHELYADIN, R EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FALALEEV, V FASSOULIOTIS, D ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F FORSBACH, H FRANEK, B FRANSSON, KE FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GAGO, JM GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GLITZA, KW GOKIELI, R GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROS, MH GROSDIDIER, G GROSSETETE, B GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW HERBST, I HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D HYAMS, BD IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KANTARDJIAN, G KAPUSTA, F KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLIUTCHNIKOV, G KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KORZEN, B KOURKOUMELIS, C KREUZBERGER, T KROLIKOWSKI, J KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIKO, D LIEB, E LILLETHUN, E LINDGREN, J LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B LOKAJICEK, M LOKEN, JG AGUERA, MAL LOPEZFERNANDEZ, A LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUCOCK, R LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MALTEZOS, A MALTEZOS, S MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G MATVEEV, M MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MENICHETTI, E MERONI, C MEYER, WT MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MULLER, H MURRAY, WJ MYATT, G NARAGHI, F NAUKORZEN, U NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O PINSENT, A POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A PYYHTIA, J RADOJICIC, D RAGAZZI, S RANGE, WH RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R STUBENRAUCH, CJ SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O UVAROV, VA VALENTI, G VALLAZZA, E FERRER, JAV VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VANEIJNDHOVEN, N VANDERVELDE, C VARELA, J VAZ, P VEGNI, G VELASCO, J VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VIBERT, L VILANOVA, D VITALE, L VLASOV, EV VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J TI STUDY OF ORIENTATION OF 3-JET EVENTS IN Z(0) HADRONIC DECAYS USING THE DELPHI DETECTOR SO PHYSICS LETTERS B LA English DT Article ID LUND MONTE-CARLO; E+E-ANNIHILATION; JET FRAGMENTATION; PHYSICS; PETRA AB The study of the orientation of three-jet events from e+ e- --> Z0 --> multi-hadrons is presented, in particular the polar angle distributions of the thrust axis and of the normal to the three-jet plane, and the azimuthal correlations between the hadron plane and the one defined by the beam and thrust axes. The data are compared with results at lower energy and with QCD predictions. Good agreement with QCD predictions is observed. The scalar gluon theory is excluded by the data. C1 AUSTRIAN ACAD SCI,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA. CENS,DEPT PHYS PARTICULES ELEMENT,F-91191 GIF SUR YVETTE,FRANCE. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV LUND,DEPT PHYS,S-22362 LUND,SWEDEN. JOINT INST NUCL RES,MOSCOW 101000,USSR. UNIV VALENCIA,CSIC,INST FIS CORPUSCULAR,E-46100 BURJASSOT,SPAIN. UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY. CERN,CH-1211 GENEVA 23,SWITZERLAND. UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE. UNIV LYON 1,F-69622 VILLEURBANNE,FRANCE. UNIV KARLSRUHE,INST EXPTL KERNPHYS,W-7500 KARLSRUHE 1,GERMANY. UNIV STOCKHOLM,INST PHYS,S-11346 STOCKHOLM,SWEDEN. UNIV PARIS 06,LPNHE,F-75230 PARIS 05,FRANCE. UNIV PARIS 07,LPNHE,F-75221 PARIS 05,FRANCE. UNIV PARIS 11,ACCELERATEUR LINEAR LAB,F-91405 ORSAY,FRANCE. UNIV TRIESTE,DIPARTMENTO FIS,I-34127 TRIESTE,ITALY. IST NAZL FIS NUCL,I-34127 TRIESTE,ITALY. UNIV UDINE,IST FIS,I-33100 UDINE,ITALY. IST SUPER SANITA,IST NAZL FIS NUCL,I-00161 ROME,ITALY. UNIV MILAN,DIPARTMENTO FIS,I-20133 MILAN,ITALY. IST NAZL FIS NUCL,I-20133 MILAN,ITALY. UNIV OXFORD,NUCL PHYS LAB,OXFORD OX1 3RH,ENGLAND. UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,W-5600 WUPPERTAL 1,GERMANY. UNIV GENOA,DIPARTIMENTO FIS,I-16146 GENOA,ITALY. IST NAZL FIS NUCL,I-16146 GENOA,ITALY. COLL FRANCE,PHYS CORPUSCULAIRE LAB,F-75231 PARIS 05,FRANCE. PROTVINO HIGH ENERGY PHYS INST,PROTVINO 142284,USSR. DEMOCRITOS NUCL RES CTR,INST NUCL PHYS,GR-15310 ATHENS,GREECE. UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM. UNIV LIBRE BRUXELLES,VRIJE UNIV BRUSSELS,IIHE,B-1050 BRUSSELS,BELGIUM. UNIV ETAT MONS,FAC SCI,SERV PHYS PARTICULES ELEMENTAIRES,B-7000 MONS,BELGIUM. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,ENGLAND. UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY. IST NAZL FIS NUCL,I-10125 TURIN,ITALY. NIKHEF H,1009 DB AMSTERDAM,NETHERLANDS. UNIV UPPSALA,DEPT RADIAT SCI,S-75121 UPPSALA,SWEDEN. UNIV PADUA,DIPARTMENTO FIS,I-35131 PADUA,ITALY. IST NAZL FIS NUCL,I-35131 PADUA,ITALY. UNIV HELSINKI,HIGH ENERGY PHYS RES INST,SF-00170 HELSINKI 17,FINLAND. UNIV OSLO,DEPT PHYS,N-1000 OSLO 3,NORWAY. UNIV SANTANDER,FAC CIENCIAS,E-39005 SANTANDER,SPAIN. UNIV ROME 2,DIPARTIMENTO FIS,I-00173 ROME,ITALY. IST NAZL FIS NUCL,I-00173 ROME,ITALY. UNIV BOLOGNA,DIPARTMENTO FIS,I-40126 BOLOGNA,ITALY. IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY. UNIV COMPLUTENSE MADRID,DEPT FIS ATOM MOLEC & NUCL,E-28040 MADRID,SPAIN. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. NIELS BOHR INST,DK-2100 COPENHAGEN O,DENMARK. UNIV WARSAW,PL-00681 WARSAW,POLAND. INST NUCL STUDIES,PL-00681 WARSAW,POLAND. NATL TECH UNIV ATHENS,DEPT PHYS,GR-15773 ATHENS,GREECE. INST NUCL PHYS,HIGH ENERGY PHYS LAB,PL-30055 KRAKOW 30,POLAND. UNIV AIX MARSEILLE 2,FAC SCI LUMINY,F-13288 MARSEILLE 09,FRANCE. CRN GRP DELPHI,DIV HAUTES ENERGIES,F-67037 STRASBOURG,FRANCE. LEPSI,F-67037 STRASBOURG,FRANCE. RP ABREU, P (reprint author), LAB INSTRUMENTAC & FIS EXPTL PARTICULAS,ELIAS GARCIA 14-LE,P-1000 LISBON,PORTUGAL. RI Vaz, Pedro/K-2464-2013; de Groot, Nicolo/A-2675-2009; Katsanevas, Stavros/A-4297-2011; Ruiz, Alberto/E-4473-2011; branchini, paolo/A-4857-2011; Shellard, Ronald/G-4825-2012; Giacomelli, Paolo/B-8076-2009; Fruhwirth, Rudolf/H-2529-2012; Dracos, Marcos/K-2335-2012; Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011; Fernandez-Alonso, Mercedes/F-2557-2016; Lozano-Bahilo, Julio/F-4881-2016; Olshevskiy, Alexander/I-1580-2016; Hernandez-Rey, Juan Jose/N-5955-2014; Abreu, Pedro/L-2220-2014; Barao, Fernando/O-2357-2016; Zaitsev, Alexandre/B-8989-2017; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Zukanovich Funchal, Renata/C-5829-2013; Contreras Gonzalez, Jose Luis/K-7255-2014; Gomez Cadenas, Juan Jose/L-2003-2014; Ragazzi, Stefano/D-2463-2009; Roditi, Itzhak/O-7448-2014; Zuniga, Juan/P-4385-2014; Michelotto, Michele/A-9571-2013; Matorras, Francisco/I-4983-2015; Ferrer, Antonio/H-2942-2015; Rovelli, Tiziano/K-4432-2015 OI Vaz, Pedro/0000-0002-7186-2359; Ruiz, Alberto/0000-0002-3639-0368; Shellard, Ronald/0000-0002-2983-1815; Dracos, Marcos/0000-0003-0514-193X; Fernandez-Alonso, Mercedes/0000-0002-1311-5275; Lozano-Bahilo, Julio/0000-0003-0613-140X; Olshevskiy, Alexander/0000-0002-8902-1793; Hernandez-Rey, Juan Jose/0000-0002-1527-7200; Abreu, Pedro/0000-0002-9973-7314; Barao, Fernando/0000-0002-8346-9941; Zaitsev, Alexandre/0000-0002-4961-8368; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Zukanovich Funchal, Renata/0000-0001-6749-0022; Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Gomez Cadenas, Juan Jose/0000-0002-8224-7714; Ragazzi, Stefano/0000-0001-8219-2074; Roditi, Itzhak/0000-0003-2363-5626; Zuniga, Juan/0000-0002-1041-6451; Michelotto, Michele/0000-0001-6644-987X; Matorras, Francisco/0000-0003-4295-5668; Ferrer, Antonio/0000-0003-0532-711X; Rovelli, Tiziano/0000-0002-9746-4842 NR 18 TC 16 Z9 16 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD JAN 16 PY 1992 VL 274 IS 3-4 BP 498 EP 506 DI 10.1016/0370-2693(92)92023-A PG 9 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HE342 UT WOS:A1992HE34200041 ER PT J AU DOSE, EV GUIOCHON, G AF DOSE, EV GUIOCHON, G TI PROBLEMS OF QUANTITATIVE INJECTION IN CAPILLARY ZONE ELECTROPHORESIS SO ANALYTICAL CHEMISTRY LA English DT Article ID CONDUCTIVITY DETECTION AB CZE effective injection volumes are modified by two effects discussed in this article: diffusion and inadvertent hydrodynamic flow. Diffusion causes net flow into or out of the capillary whenever there exists a concentration gradient at the capillary inlet, and it is most important for small molecules, for short injection zones, and for slow injection sequences. Inadvertent hydrodynamic flow, most likely caused by a difference in levels of the liquids in the two reservoirs, is most important for liquid level differences of a few millimeters or more, for short injection zones, and for capillaries of short length and large inside diameter. Computer simulations of the first few millimeters of capillary length show how concentration profiles can develop rapidly. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV ANALYT CHEM,OAK RIDGE,TN 37831. NR 18 TC 48 Z9 48 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD JAN 15 PY 1992 VL 64 IS 2 BP 123 EP 128 DI 10.1021/ac00026a005 PG 6 WC Chemistry, Analytical SC Chemistry GA GZ542 UT WOS:A1992GZ54200005 ER PT J AU WANG, J BRENNSTEINER, A ANGNES, L SYLWESTER, A LAGASSE, RR BITSCH, N AF WANG, J BRENNSTEINER, A ANGNES, L SYLWESTER, A LAGASSE, RR BITSCH, N TI MERCURY-COATED CARBON-FOAM COMPOSITE ELECTRODES FOR STRIPPING ANALYSIS OF TRACE-METALS SO ANALYTICAL CHEMISTRY LA English DT Article ID FIBER ELECTRODES; VOLTAMMETRY AB The advantages and characteristics of mercury-coated carbon-foam composite electrodes for stripping analysis of trace metals are described. The enhanced perimeter-to-area ratios characterizing these composite surfaces offer high preconcentration efficiencies from quiescent solutions. Additional advantages accrue from the lower oxygen-reduction and mercury-oxidation background-current components. Scanning-tunneling and scanning electron microscopies offer valuable insights into the unique microstructure of the mercury film and substrate. Exploratory experiments have shown the dependence of the stripping response upon numerous experimental variables. Convenient quantitation of lead in drinking water is accomplished with quiescent solution and short deposition period. Since neither stirring nor deoxygenation is required, composite-based stripping electrodes should be valuable for field and remote operations. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RADIOMETER ANALYT A-S,DK-2880 BAGSVAERD,DENMARK. RP WANG, J (reprint author), NEW MEXICO STATE UNIV,DEPT CHEM,LAS CRUCES,NM 88003, USA. RI Institute of Chemistry - USP, Dept. of Chemistry/B-8988-2012; Wang, Joseph/C-6175-2011 NR 18 TC 24 Z9 24 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD JAN 15 PY 1992 VL 64 IS 2 BP 151 EP 155 DI 10.1021/ac00026a011 PG 5 WC Chemistry, Analytical SC Chemistry GA GZ542 UT WOS:A1992GZ54200011 ER PT J AU STEVENS, RG SAVITZ, DA AF STEVENS, RG SAVITZ, DA TI IS ELECTROMAGNETIC-FIELDS AND CANCER AN ISSUE WORTHY OF STUDY SO CANCER LA English DT Letter ID 60-HZ ELECTRIC-FIELDS; MAGNETIC-FIELDS; BREAST-CANCER; LOW-FREQUENCY; EXPOSURE; MELATONIN; CELLS; RAT C1 UNIV N CAROLINA, DEPT EPIDEMIOL, CHAPEL HILL, NC 27514 USA. RP STEVENS, RG (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 43 TC 6 Z9 6 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0008-543X J9 CANCER JI Cancer PD JAN 15 PY 1992 VL 69 IS 2 BP 603 EP 606 DI 10.1002/1097-0142(19920115)69:2<603::AID-CNCR2820690256>3.0.CO;2-2 PG 4 WC Oncology SC Oncology GA GY837 UT WOS:A1992GY83700056 PM 1728396 ER PT J AU PRESTON, GA PAYNE, HS PRESTON, RJ AF PRESTON, GA PAYNE, HS PRESTON, RJ TI ISOLATION AND CHARACTERIZATION OF A 1-BETA-D-ARABINOFURANOSYLCYTOSINE-RESISTANT CHINESE-HAMSTER OVARY CELL MUTANT THAT IS ALSO X-RAY SENSITIVE AND IS NONCOMPLEMENTARY WITH ATAXIA TELANGIECTASIA CELLS SO CANCER RESEARCH LA English DT Article ID INDUCED CHROMOSOME-ABERRATIONS; RADIORESISTANT DNA-SYNTHESIS; SISTER-CHROMATID EXCHANGES; DOUBLE-STRAND BREAKS; CYTOSINE-ARABINOSIDE; IONIZING-RADIATION; CROSS-SENSITIVITY; POLYMERASE-BETA; SINGLE-STRAND; CHO-CELL AB In order to study the mechanism of induction of mutations and chromosome aberrations by ionizing radiations, it is particularly useful to have available radiation-sensitive mutants. While several X-ray-sensitive rodent cell lines are available, they have been selected rather nonspecifically. It was determined that selection for resistance to the DNA replication/repair inhibitor, 1-beta-D-arabinofuranosylcytosine (ara-C), would permit production of a set of X-ray-sensitive mutant cell lines that would be defective in the resynthesis step of excision or recombination repair. Such mutant cells could also be used for the isolation and characterization of human DNA repair genes. In particular, it was predicted that the repair gene defective in individuals with ataxia telangiectasia (AT) might be amenable to study with ara-C-resistant (X-ray-sensitive) mutants, since additional studies, presented here, have shown that AT cells are resistant to ara-C. In the long term, it is hoped that determining the specific defect in AT might lead to an understanding of the possible role of defective repair in tumor induction and/or progression. The general approach used to isolate ara-C-resistant Chinese hamster ovary cell mutants was to treat cells with ethyl methanesulfonate and select in increasing concentrations of ara-C. Although several mutants were isolated, one in particular, Ara-C(R)213, has been studied most extensively. It was selected largely because it shows the greatest sensitivity to X-rays. Ara-C(R)213 cells were hypersensitive to the killing effect of X-rays with an LD10 of 2.5 Gy as compared to the wild-type cells that had an LD10 of 6 Gy. The mutant showed an increased frequency of X-ray-induced chromosomal aberrations in the G1 and G2 stages of the cell cycle compared to wild-type frequencies. There was no increase in sister chromatid exchange levels. All of these observations in Ara-C(R)213 are very similar to those made with AT cells in our and other laboratories. Even more important, complementation analysis of Ara-C(R)213 x AT hybrid cells indicated that the gene responsible for X-ray sensitivity of AT is also mutated in Ara-C(R)213 cells. Thus, Ara-C(R)213 appears to have a mutant phenotype and probably genotype that is very similar to, if not exactly the same as, those of AT. This makes it quite different from other X-ray-sensitive cells that have been isolated in other laboratories. C1 UNIV TENNESSEE,OAK RIDGE GRAD SCH BIOMED SCI,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. FU NCI NIH HHS [CA09104-13] NR 66 TC 17 Z9 17 U1 0 U2 0 PU AMER ASSOC CANCER RESEARCH PI PHILADELPHIA PA PUBLIC LEDGER BLDG, SUITE 816, 150 S. INDEPENDENCE MALL W., PHILADELPHIA, PA 19106 SN 0008-5472 J9 CANCER RES JI Cancer Res. PD JAN 15 PY 1992 VL 52 IS 2 BP 319 EP 327 PG 9 WC Oncology SC Oncology GA GZ693 UT WOS:A1992GZ69300014 PM 1728406 ER PT J AU MINNICK, MF STILLWELL, LC HEINEMAN, JM STIEGLER, GL AF MINNICK, MF STILLWELL, LC HEINEMAN, JM STIEGLER, GL TI A HIGHLY REPETITIVE DNA-SEQUENCE POSSIBLY UNIQUE TO CANIDS SO GENE LA English DT Note DE CANIS-FAMILIARIS; DOG; REPETITIVE ELEMENT; NUCLEOTIDE SEQUENCE; SHORT INTERSPERSED NUCLEOTIDE ELEMENT; INTERFERON ID NUCLEOTIDE-SEQUENCES; ESCHERICHIA-COLI; RNA GENES; PSEUDOGENES; EXPRESSION; EVOLUTION AB A short interspersed nucleotide (nt) element (SINE) was cloned from the genomic DNA of the domestic dog, Canis familiaris. Southern-blot analysis of canine DNA digested with four restriction endonucleases indicated that the SINE is widely dispersed throughout the genome. Hybridizations also indicated that the element may be unique to canids and is absent in a variety of other mammals, including members of four closely-related carnivore families. Three examples of the SINE have been located and sequenced. The 130-bp SINE contains putative RNA polymerase III transcriptional control sequences. The SINE is flanked at the 3' end by a (TC)8-repeat region followed by a poly(A) tract of 35-65 nt. Computer database searches located two homologous sequences with approx. 80% identity to the SINE. These sequences were located in untranslated regions of the canine genes encoding interferon-omega and clotting factor IX. C1 PACIFIC NW LAB, DEPT BIOL, RICHLAND, WA 99352 USA. NR 21 TC 54 Z9 54 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-1119 J9 GENE JI Gene PD JAN 15 PY 1992 VL 110 IS 2 BP 235 EP 238 DI 10.1016/0378-1119(92)90654-8 PG 4 WC Genetics & Heredity SC Genetics & Heredity GA HF713 UT WOS:A1992HF71300015 PM 1537560 ER PT J AU HOLTMEIER, GM ALEXANDER, DR BARTON, JP AF HOLTMEIER, GM ALEXANDER, DR BARTON, JP TI HIGH-INTENSITY ULTRAVIOLET-LASER INTERACTION WITH A METALLIC FILAMENT SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID AEROSOLS; RADIATION; ABLATION; SYSTEM AB Results of research conducted on interaction of high-intensity ultraviolet pulsed KrF laser radiation with a metallic filament in atmospheric air are reported. Experimental results are presented on the time dependent material ejection dynamics associated with pulsed single shot focused excimer laser beams interacting with a small diameter wire. Copper wire 75-mu-m in diameter was illuminated with a KrF (lambda = 248 nm, pulse duration = 17 ns full width at half-maximum) excimer laser at an irradiance of 80 GW/cm2. Interaction dynamics were recorded using both real-time and double-strobed ultraviolet laser imaging techniques. Temporal and spatial evolutions of both vaporized and molten material are reported. Material observed, during two-dimensional shadow imaging, on the side opposite the incident beam (shadow side) was shown to originate from the front ablating surface without spallation of material on the shadow surface. Several spatial material emission velocities are reported utilizing two different imaging techniques. A maximum velocity of 1500 m/s was obtained for material ejected in a direction toward the ablating laser. C1 UNIV NEBRASKA,CTR ELECTRO OPT,LINCOLN,NE 68588. RP HOLTMEIER, GM (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LAWRENCE LIVERMORE NATL LAB,POB 808,L-423,LIVERMORE,CA 94551, USA. NR 15 TC 3 Z9 4 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 15 PY 1992 VL 71 IS 2 BP 557 EP 563 DI 10.1063/1.350405 PG 7 WC Physics, Applied SC Physics GA HA645 UT WOS:A1992HA64500002 ER PT J AU CAMP, JB DARLING, TW BROWN, RE AF CAMP, JB DARLING, TW BROWN, RE TI EFFECT OF CRYSTALLITES ON SURFACE-POTENTIAL VARIATIONS OF AU AND GRAPHITE SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID GOLD AB Surfaces made of the nonreactive materials Au and graphite exhibit low surface potential variations after a low-temperature ultrahigh vacuum bake. The variations (due to the finite size crystallites of these materials) may be reduced to a minimum by using Au surfaces of grain size less than 10 nm and graphite surfaces with highly aligned c-axis orientation. Procedures where this may be accomplished are described. Application to the Los Alamos antiproton gravity experiment is presented. RP CAMP, JB (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. NR 11 TC 23 Z9 23 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 15 PY 1992 VL 71 IS 2 BP 783 EP 785 DI 10.1063/1.351358 PG 3 WC Physics, Applied SC Physics GA HA645 UT WOS:A1992HA64500038 ER PT J AU BRITTEN, JA THOMAS, IM AF BRITTEN, JA THOMAS, IM TI NON-NEWTONIAN FLOW EFFECTS DURING SPIN COATING LARGE-AREA OPTICAL COATINGS WITH COLLOIDAL SUSPENSIONS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID ROTATING-DISK; RHEOLOGY AB Multilayer sol-gel optical high reflectors with greater than 99% reflection have been prepared on substrates up to 20 cm in diameter by spin coating silica/alumina colloidal suspensions. These coatings are radially nonuniform, owing to the extensive shear-thinning rheology of the high-index alumina suspension. To a large degree the film thickness nonuniformity can be compensated for by the reflection bandwidth. The rheological properties of the alumina suspension under steady shear have been measured. The low-shear reduced viscosity and the shear-thinning time constant are shown to vary exponentially with phi(2), where phi is the solids volume fraction. At phi = 0.1 the sol has effectively gelled. A model for spincoating with a non-Newtonian fluid has been developed that uses the Carreau rheology model to fit the measured viscometric data. Modeling and experimental results show that as long as these non-Newtonian effects are sufficiently large (as in this case) the radial film uniformity is determined only by these parameters and cannot be significantly influenced by spin rate, initial solids fraction, or any other parameters under the control of the operator. However, most of the film thickness variation occurs in the first 1-2 cm from the substrate center, leaving the remainder almost uniform. Therefore the degree of nonuniformity does not appreciably increase with increasing substrate size. RP BRITTEN, JA (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 23 TC 23 Z9 24 U1 1 U2 14 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 15 PY 1992 VL 71 IS 2 BP 972 EP 979 DI 10.1063/1.351323 PG 8 WC Physics, Applied SC Physics GA HA645 UT WOS:A1992HA64500068 ER PT J AU ORREN, DK SELBY, CP HEARST, JE SANCAR, A AF ORREN, DK SELBY, CP HEARST, JE SANCAR, A TI POST-INCISION STEPS OF NUCLEOTIDE EXCISION REPAIR IN ESCHERICHIA-COLI - DISASSEMBLY OF THE UVRBC-DNA COMPLEX BY HELICASE-II AND DNA-POLYMERASE-I SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID (A)BC EXCINUCLEASE; GENE-PRODUCT; PROTEIN; NUCLEASE; ENZYME AB UvrA, UvrB, and UvrC initiate nucleotide excision repair by incising a damaged DNA strand on each side of the damaged nucleotide. This incision reaction is substoichiometric with regard to UvrB and UvrC, suggesting that both proteins remain bound following incision and do not "turn over." The addition of only helicase II to such reaction mixtures turns over UvrC; UvrB turnover requires the addition of helicase II, DNA polymerase I, and deoxynucleoside triphosphates. Column chromatography and psoralen photocross-linking experiments show that following incision, the damaged oligomer remains associated with the undamaged strand, UvrB, and UvrC in a post-incision complex. Helicase II releases the damaged oligomer and UvrC from this complex, making repair synthesis possible; DNase I footprinting experiments show that UvrB remains bound to the resulting gapped DNA until displaced by DNA polymerase I. The specific binding of UvrB to a psoralen adduct in DNA inhibits psoralen-mediated DNA-DNA cross-linking, yet promotes the formation of UrvB-psoralen-DNA cross-links. The discovery of psoralen-UvrB photocross-linking offers the potential of active-site labeling. C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DEPT CHEM, BERKELEY, CA 94720 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV CHEM BIODYNAM, BERKELEY, CA 94720 USA. RP ORREN, DK (reprint author), UNIV N CAROLINA, SCH MED, DEPT BIOCHEM & BIOPHYS, CHAPEL HILL, NC 27599 USA. FU NIGMS NIH HHS [GM32833] NR 31 TC 114 Z9 114 U1 0 U2 0 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD JAN 15 PY 1992 VL 267 IS 2 BP 780 EP 788 PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA GY960 UT WOS:A1992GY96000019 PM 1530937 ER PT J AU LANDRY, J LAMBERT, H ZHOU, M LAVOIE, JN HICKEY, E WEBER, LA ANDERSON, CW AF LANDRY, J LAMBERT, H ZHOU, M LAVOIE, JN HICKEY, E WEBER, LA ANDERSON, CW TI HUMAN HSP27 IS PHOSPHORYLATED AT SERINES-78 AND SERINES-82 BY HEAT-SHOCK AND MITOGEN-ACTIVATED KINASES THAT RECOGNIZE THE SAME AMINO-ACID MOTIF AS S6 KINASE-II SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID MAMMALIAN STRESS PROTEINS; EHRLICH ASCITES TUMOR; CHINESE-HAMSTER-CELLS; ALPHA-CRYSTALLIN; DROSOPHILA-MELANOGASTER; RIBOSOMAL PROTEIN-S6; GROWTH-FACTOR; RODENT CELLS; HELA-CELLS; 27 KDA AB The intracellular concentration of the 27-kDa mammalian heat shock protein, HSP27, increases several-fold after heat and other metabolic stresses and is closely associated with the acquisition of thermotolerance. Posttranslational modifications may also affect the function of HSP27. Heat shock of HeLa cell cultures, or treatment with arsenite, phorbol ester, or tumor necrosis factor, caused a rapid phosphorylation of preexisting HSP27 and the appearance of three phosphorylated isoforms, HSP27 B, C, and D. Digestion with trypsin and fractionation of the peptides by reverse phase high performance liquid chromatography revealed three P-32-labeled phosphopeptides. Microsequence analysis identified peak I as Ala76-Leu77-Ser78-Arg79 and peak II as Gln80-Leu81-Ser82-Ser83-Gly84-Val85-Ser86-Glu87-Ile88-Arg89 peak III contained the undigested peptide pair Ala76-Arg89. Ser82 was the major site and Ser78 the minor site of phosphorylation. Mutant proteins with Ser78 or Ser82 altered to glycine or Ser78-Ser82 double mutants were phosphorylated to reduced extents in vivo after heat or arsenite treatment. Ser78 and Ser82 (and Ser15) occur in the sequence motif RXXS, which is recognized by ribosomal protein S6 kinase II. Mitogenic stimulation of serum-deprived, G(o)-arrested Chinese hamster cells with serum, thrombin, or fibroblast growth factor also stimulated phosphorylation of HSP27 Ser78 and Ser82, and mitogenic stimulation and heat shock activated protein kinase activities that phosphorylated HSP27 and protein S6 in vitro. These results suggest that HSP27 may exert phosphorylation-activated functions linked with growth signaling pathways in unstressed cells. A homeostatic function at this level could protect cells from adverse effects of signal transduction systems which may be activated inappropriately during stress. C1 UNIV NEVADA,DEPT BIOL,RENO,NV 89557. BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. RP LANDRY, J (reprint author), UNIV LAVAL,HOTEL DIEU QUEBEC,CTR CANCEROL,11 COTE DU PALAIS,QUEBEC CITY G1R 2J6,QUEBEC,CANADA. FU NIGMS NIH HHS [GM43167] NR 68 TC 394 Z9 405 U1 0 U2 1 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD JAN 15 PY 1992 VL 267 IS 2 BP 794 EP 803 PG 10 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA GY960 UT WOS:A1992GY96000021 PM 1730670 ER PT J AU BRAUNSTEIN, M PACK, RT AF BRAUNSTEIN, M PACK, RT TI SIMPLE THEORY OF DIFFUSE STRUCTURE IN CONTINUOUS UV SPECTRA OF POLYATOMIC-MOLECULES .2. PHOTODISSOCIATION OF BENT SYMMETRICAL TRIATOMICS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID QUANTUM REACTIVE SCATTERING; PHOTODETACHMENT SPECTRUM; PHOTO-DISSOCIATION; RESONANCES; SPECTROSCOPY; STATE; CO2 AB We present two simple models for calculating photoabsorption spectra of bent symmetric triatomic molecules, one designed for light-heavy-light systems with an inactive bending mode and a more general one with no assumptions about atomic mass ratios and where bending motion may be active. Both models are extensions of an earlier model [R. T Pack, J. Chem. Phys. 65, 4765 (1976)] for the photodissociation of collinear symmetric triatomic molecules which showed that excitation to a single dissociative electronic state can give absorption spectra with rich structure due to bound degrees of freedom perpendicular to the dissociation coordinate. Similarly, the present models predict structure in the absorption spectra which is easily understood in terms of the vibrational frequencies and bond lengths, and the steepness and height of the excited state barrier. As a test case, we use the models to calculate the photoabsorption spectra of the X 1A1 --> A 1B1 transition in water which is known to involve a single dissociative excited state surface. We find that these models, which only require knowledge of the ground-state potential-energy surface near the minimum and the excited state potential-energy surface in the barrier region, are quite successful and may serve as simple tools to investigate photoabsorption spectra of other molecules. RP BRAUNSTEIN, M (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET T12,MS B268,LOS ALAMOS,NM 87545, USA. NR 34 TC 12 Z9 12 U1 1 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JAN 15 PY 1992 VL 96 IS 2 BP 891 EP 897 DI 10.1063/1.462109 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA GZ913 UT WOS:A1992GZ91300004 ER PT J AU YOO, RK RUSCIC, B BERKOWITZ, J AF YOO, RK RUSCIC, B BERKOWITZ, J TI VACUUM ULTRAVIOLET PHOTOIONIZATION MASS-SPECTROMETRIC STUDY OF C-60 SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID CARBON CLUSTER IONS; NEUTRAL FRAGMENT; BUCKMINSTERFULLERENE AB Gaseous C60 has been studied by photoionization mass spectrometry between the ionization threshold and 40.8 eV. An adiabatic threshold of 7.57 +/- 0.01 eV is observed, which may be slightly low due to hot bands. The energy derivative of the photoin yield curve is in rough agreement with the He I photoelectron spectrum on the positions of some peaks, but others are weak or absent. The discrepancy is not attributed to autoionization, but rather to selection rules governing the ejection of low energy electrons into high angular momentum waves. C60+ + is observed at higher energies, and becomes approximately 0.6 as intense as C60+ at 40.8 eV. The photoion yield curve of C60+ +, approximately linear well above threshold, appears to exhibit curvature near threshold, thwarting an attempt to make a distinction between two alternative values of the second ionization potential. Fragmentation to form C58+ is only observed at the highest energy, 40.8 eV. The unimolecular decay is modelled by quasiequilibrium theory. In this model, the kinetic shift is of the order of 30 eV, and the minimum energy for dissociation into C58+ + C2 seems to be 6.0-6.5 eV. RP YOO, RK (reprint author), ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439, USA. RI Ruscic, Branko/A-8716-2008 OI Ruscic, Branko/0000-0002-4372-6990 NR 42 TC 188 Z9 188 U1 0 U2 9 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JAN 15 PY 1992 VL 96 IS 2 BP 911 EP 918 DI 10.1063/1.462112 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA GZ913 UT WOS:A1992GZ91300007 ER PT J AU HONG, D HESSLER, JP AF HONG, D HESSLER, JP TI RATE COEFFICIENT FOR THE REACTION H + O-2-]OH + O - RESULTS AT HIGH-TEMPERATURES, 2000-K TO 5300-K SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID MANY-BODY EXPANSION; VIBRATIONAL-ENERGY TRANSFER; THERMAL RATE COEFFICIENT; EXPONENTIAL TRANSITION-PROBABILITIES; GROUND-STATE HO2; SHOCK-TUBE; + O; THEORETICAL CHARACTERIZATION; TRAJECTORY CALCULATIONS; CHEMICAL-REACTIONS AB The tunable-laser flash-absorption technique has been used to study the high-temperature behavior of the reaction H + O2 --> OH + O by monitoring the absorption of the hydroxyl radical. Sensitivity analysis of a detailed reaction mechanism shows that for fuel rich mixtures only two reactions are sensitive when hydroxyl is monitored: H-2 + M --> 2H + M and H + O2 --> OH + O. Rate coefficients for these reactions have been determined by least-squares analysis of measured absorption profiles. For the rate of dissociation of H-2 in krypton we obtain k1 (T) = (8.86 +/- 0.88) x 10(-10) exp[ -48321/T (K)] cm3 s-1 from 3450 to 5300 K. For the H + O2 reaction we combined our results with previous low temperature measurements and recommend k2 (T) = (1.62 +/- 0.12) x 10(-10) exp[ - (7474 +/- 122)/T (K)] cm3 s-1 from 960 to 5300 K. The uncertainties are at the 95% confidence level. Measured cross sections for rotational and vibrational energy transfer in O2 and OH have been used to show that relaxation effects do not influence the results. We compare our results to recent trajectory calculations. In addition, we calculate the rate of the reverse reaction, OH + O --> H + O2, and compare it to trajectory and statistical adiabatic channel calculations. Finally, we point out that the first excited surface of the hydroperoxyl radical, 2A', which correlates with H(2S) + O2 ((1)DELTA(g)), may be needed to explain very high temperature results. RP HONG, D (reprint author), ARGONNE NATL LAB,DIV CHEM,GAS PHASE CHEM DYNAM GRP,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 99 TC 4 Z9 4 U1 0 U2 7 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JAN 15 PY 1992 VL 96 IS 2 BP 1077 EP 1092 PG 16 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA GZ913 UT WOS:A1992GZ91300024 ER PT J AU BOEHM, RC BANERJEE, A AF BOEHM, RC BANERJEE, A TI THEORETICAL-STUDY OF LITHIUM INTERCALATED GRAPHITE SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID QUANTUM-CHEMISTRY; INTERLAYER STATES; CARBON CLUSTERS; HARTREE-FOCK; CHEMISORPTION; METHYLENE; DIFFUSION; ENERGIES; LIC6 AB We have performed a series of calculations on small models (number of atoms ranging from 10 to 34) of graphite and lithium intercalated graphite (LIG) at the UHF level with a minimal basis set for the valence electrons and an effective core potential for the core electrons (CEP-4G), where the basis and the CEP is optimal for free atoms. We have shown that small model hosts, such as C-10 (Bernal i.e., AB) and C-12 (primitive hexagonal, i.e., AA), enable us to make several predictions regarding LIG. Firstly, lithium looses its valence electron upon entering either type of host lattice and eventually falls into a body-centered position in an AA host lattice. Secondly, lithium strongly destabilizes the AB lattice, while it strongly stabilizes the AA lattice. Thirdly, the barrier for site hopping in the limit of infinite dilution (E(a)) can be estimated along with a related quantity which we call the hilltop energy (see text). Further, we have shown that by building up to host models no larger than C32 (AA) we can make a better estimate of E(a) (0.72 eV), determined that the dynamics of Li (within any two-dimensional solvated sheet) is largely determined by ionic interactions with screening from adjacent carbon layers effecting an approximately 20% reduction of naked two-dimensional Li Coulombic forces, and give a reasonable indication of how much energy is liberated as Li is moved from infinity to a vacant site in unsaturated LIG (1.1 +/- 0.7 eV). RP BOEHM, RC (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 23 TC 32 Z9 32 U1 0 U2 11 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JAN 15 PY 1992 VL 96 IS 2 BP 1150 EP 1157 DI 10.1063/1.462202 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA GZ913 UT WOS:A1992GZ91300032 ER PT J AU FOURNIER, R DEPRISTO, AE AF FOURNIER, R DEPRISTO, AE TI PREDICTED BOND-ENERGIES IN PEROXIDES AND DISULFIDES BY DENSITY FUNCTIONAL METHODS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID MOLECULAR-STRUCTURE; POLYATOMIC-MOLECULES; LINEAR COMBINATION; HYDROGEN-PEROXIDE; DIMETHYL PEROXIDE; BASIS-SETS; ACCURATE; GRADIENT; APPROXIMATION; SPECTROSCOPY AB We have performed self-consistent linear combination of Gaussian-type orbitals-density functional calculations for the molecules YY, RY, RYY, RYR', RYYR, and RYYR' with Y = O,S and R,R' = H,CH3. The structures were optimized within the local spin density approximation while the Y-Y, Y-C, and Y-H bond dissociation energies (BDE) were calculated with both a local exchange-correlation energy functional and a gradient corrected functional. Comparison of results obtained with the local and gradient corrected exchange-correlation functionals provides more experience on the successes and failures of gradient corrections. Trends in BDEs and the nature of bonding in oxygen and sulfur containing analog molecules are analyzed on the basis of two observations: (1) the O atom is more electronegative than S, C, and H atoms; (2) a S atom can have a valency larger than two and has a greater ability for multiple bonding than oxygen. Finally, comparison with a number of experimental results suggest that the C-S BDE in CH3S, the S-S BDE in CH3SSCH3, and the enthalpy of formation of CH3S should be reexamined. C1 IOWA STATE UNIV SCI & TECHNOL,USDOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 65 TC 52 Z9 53 U1 0 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JAN 15 PY 1992 VL 96 IS 2 BP 1183 EP 1193 DI 10.1063/1.462206 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA GZ913 UT WOS:A1992GZ91300036 ER PT J AU FOURNIER, R STAVE, MS DEPRISTO, AE AF FOURNIER, R STAVE, MS DEPRISTO, AE TI DISSOCIATION DYNAMICS OF D2 ON RIGID AND NONRIGID NI CLUSTERS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID MOLECULAR-DYNAMICS; METAL-CLUSTERS; IRON CLUSTERS; SEMICONDUCTOR CLUSTERS; ADSORPTION-KINETICS; CHEMICAL-REACTIONS; NI(111) SURFACES; BODY FORMULATION; NICKEL CLUSTERS; CHEMISORPTION AB We present results of a theoretical study of the dissociation dynamics of D2 on Ni(N) clusters with N = 3-13. First, the semiempirical density functional based molecular dynamics/Monte Carlo corrected effective medium method was used to predict the interaction energies of various Ni clusters in this size range. We identified the most stable clusters and found that only N = 9 possesses two nearly equally stable isomers with an energy difference of only 0.03 eV. Second, we performed classical trajectory simulations of the reactions in which the Ni atoms were allowed to move. The dissociation cross sections from calculations on the nonrigid clusters were nearly equal to those obtained with the rigid Ni cluster. A particularly intriguing result was that the dissociation cross sections calculated for the two isomers of Ni9 differed significantly, especially at low collision energy. Third, we showed that the dissociation probabilities as functions of the impact parameter and relative translational energy were fit with good accuracy as a simple function of a single variable E perpendicular-to, the component of translational energy perpendicular to the surface of the cluster. This indicated that the normal energy scaling of the dissociative sticking probability observed in some gas/surface systems may have an equivalent behavior in gas/cluster systems. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP FOURNIER, R (reprint author), US DOE,AMES LAB,AMES,IA 50011, USA. NR 61 TC 14 Z9 14 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JAN 15 PY 1992 VL 96 IS 2 BP 1530 EP 1539 DI 10.1063/1.462137 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA GZ913 UT WOS:A1992GZ91300073 ER PT J AU SHIH, MC BOHANON, TM MIKRUT, JM AF SHIH, MC BOHANON, TM MIKRUT, JM TI PRESSURE AND PH-DEPENDENCE OF THE STRUCTURE OF A FATTY-ACID MONOLAYER WITH CALCIUM-IONS IN THE SUBPHASE SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID X-RAY-DIFFRACTION; LIPID MONOLAYERS; WATER; SURFACE AB We have studied the effect of pressure and pH on Langmuir monolayers of heneicosanoic acid in the presence of calcium ions in the subphase. At very low pH the monolayer is unaffected by calcium ions; as the pH is increased, the head groups are pulled closer together and the chain tilt at zero pressure decreases. As a result, the phase transitions seen along the isotherms occur at lower pressures. When the isotherms become featureless, the chains are untilted at all pressures. At very high pH, a new untilted structure is observed. C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37830. RP SHIH, MC (reprint author), NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60208, USA. NR 15 TC 75 Z9 75 U1 0 U2 7 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JAN 15 PY 1992 VL 96 IS 2 BP 1556 EP 1559 DI 10.1063/1.462139 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA GZ913 UT WOS:A1992GZ91300076 ER PT J AU BAMBERGER, CE BEGUN, GM AF BAMBERGER, CE BEGUN, GM TI THE FORMATION OF CRYSTALLINE NEEDLES OF RUTILE BY FLUX EVAPORATION SO JOURNAL OF MATERIALS SCIENCE LETTERS LA English DT Article ID POTASSIUM RP BAMBERGER, CE (reprint author), OAK RIDGE NATL LAB,DIV CHEM,POB 2008,OAK RIDGE,TN 37831, USA. NR 4 TC 1 Z9 1 U1 0 U2 0 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0261-8028 J9 J MATER SCI LETT JI J. Mater. Sci. Lett. PD JAN 15 PY 1992 VL 11 IS 2 BP 79 EP 82 DI 10.1007/BF00724604 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA HB976 UT WOS:A1992HB97600006 ER PT J AU SOSA, C FERRIS, KF NOGA, J AF SOSA, C FERRIS, KF NOGA, J TI A THEORETICAL-STUDY OF THE HARMONIC VIBRATIONAL FREQUENCIES OF SIO4H3X (X=H, LI AND NA) - MODEL STRUCTURES FOR SILICATE SURFACES SO JOURNAL OF MOLECULAR STRUCTURE LA English DT Article ID MOLECULAR-ORBITAL CALCULATIONS; INFRARED INTENSITIES; EFFECTIVE CHARGES; ORTHOSILICIC ACID; POLAR TENSORS; BASIS-SETS; ABINITIO; HYDROXYLS; ZEOLITES; FRAMEWORK AB The influence of alkali metals on the molecular spectra of silicates has been investigated using ab initio molecular orbital methods. The atomic polar tensors, harmonic vibrational frequencies and absolute infrared intensities were calculated on a series of model compounds (SiO4H3X; X = H, Li and Na). The geometries and harmonic vibrational frequencies were calculated at the Hartree-Fock level using 3-21 G and 3-21 G (d) (d functions on Si, Li and Na) basis sets. The SiO4H3X models show a bridging type structure between the alkali metals and neighbouring oxygen atom. The effects of correlation and anharmonicities were estimated by scaling the vibrational frequencies by a single parameter (0.89). Scaled harmonic vibrational frequencies for the OH stretches in SiO4H3X (X = Li and Na) are predicted lower in frequency in comparison to Si(OH)4. Lowering in the intrinsic vibrational frequencies for the OH stretches suggests an increase in the acidity of the remaining OH groups. C1 PACIFIC NW LAB, CTR MAT & CHEM SCI, RICHLAND, WA 99352 USA. SLOVAK ACAD SCI, INST INORGAN CHEM, CS-84236 BRATISLAVA, CZECHOSLOVAKIA. RI Noga, Jozef/I-6517-2015 NR 48 TC 5 Z9 5 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-2860 J9 J MOL STRUCT JI J. Mol. Struct. PD JAN 15 PY 1992 VL 265 IS 1-2 BP 163 EP 177 DI 10.1016/0022-2860(92)80247-F PG 15 WC Chemistry, Physical SC Chemistry GA HC260 UT WOS:A1992HC26000015 ER PT J AU STOLOW, A BALKO, BA CROMWELL, EF ZHANG, JS LEE, YT AF STOLOW, A BALKO, BA CROMWELL, EF ZHANG, JS LEE, YT TI THE DYNAMICS OF H-2 ELIMINATION FROM ETHYLENE SO JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY LA English DT Article; Proceedings Paper CT 15TH INTERNATIONAL CONF ON PHOTOCHEMISTRY CY JUL 28-AUG 02, 1991 CL PARIS, FRANCE SP EUROPEAN PHOTOCHEM ASSOC, B BRAUN SCITEC, CTR ETUDES NUCL SACLAY, CNRS, COMMISS EUROPEAN COMMUNITIES, DIRECT RECH ETUDES & TECH, DELEGAT GEN ARMEMENT, ELECT FRANCE, ELSEVIER SEQUOIA, ETABLISSEMENTS THUET, USN, NAVAL RES, EUROPEAN OFF ID TRANSLATIONAL ENERGY-DISTRIBUTIONS; TRANSIENT COMPLEXES; VINYLIDENE B-3(2); STATES; PHOTOLYSIS; PHOTODISSOCIATION; DISSOCIATION; ACETYLENE AB The dynamics of H-2 elimination in the photodissociation of ethylene at 193 nm were investigated through measurements of the translational energy distribution and rovibrational state distribution of H-2 products. Using 1,1-D2C-CH2 and 1,2-HDC-CDH, it was shown that both four-centered and three-centered elimination of H-2 could take place with an acetylene to vinylidene formation ratio of approximately two-thirds. Limited 1,2 hydrogen atom migration occurred during the fragmentation, presumably through an ethylidene-type structure. The relatively high rotational excitation of the H-2 fragment suggests that the transition is not symmetric; as the two ethylene hydrogen atoms approach each other and reach the transition state, one C-H bond should be significantly longer than the other. The vibrational energy distributions can be roughly characterized by a vibrational temperature of 4800 K and an average translational energy, which is dependent on the rovibrational state of H-2, exceeding 20 kcal mol-1. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RI Lee, Yuan-Tseh/F-7914-2012 NR 41 TC 34 Z9 34 U1 0 U2 4 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 1010-6030 J9 J PHOTOCH PHOTOBIO A JI J. Photochem. Photobiol. A-Chem. PD JAN 15 PY 1992 VL 62 IS 3 BP 285 EP 300 DI 10.1016/1010-6030(92)85060-8 PG 16 WC Chemistry, Physical SC Chemistry GA HC176 UT WOS:A1992HC17600002 ER PT J AU ELIZALDE, E GAZTANAGA, E AF ELIZALDE, E GAZTANAGA, E TI VOID PROBABILITY AS A FUNCTION OF THE VOIDS SHAPE AND SCALE-INVARIANT MODELS SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article ID POINT CORRELATION-FUNCTIONS; GALAXY DISTRIBUTION; STATISTICAL-ANALYSIS; MATTER DISTRIBUTION; REDSHIFT SURVEY; UNIVERSE; HIERARCHY; CATALOGS; CLUSTERS; 2-POINT AB Counts in cells, the probabilities P(i) to have i galaxies inside a randomly chosen cell of volume V, and in particular the void probability P0, are related to higher order correlation functions and have received increasing attention as a tool to study 3D redshift catalogues, and to compare them with simulations or theoretical predictions. The dependence of counts in cells on the shape of the cell is studied here. A very concrete prediction is made concerning the void distribution for scale-invariant models, namely that the shape dependence can be obtained from the volume dependence by an appropriate scaling. This prediction is tested on a sample of the CfA catalogue, and good agreement is found. It is observed that the probability of voids is bigger for spherical cells than for elongated ones, whereas the probability of a cell to be occupied has a maximum for some elongated cells. A phenomenological scale-invariant model for the observed distribution of the counts in cells - an extension of the negative binomial distribution - is exhibited in order to illustrate how this dependence can be quantitatively determined. An original, intuitive derivation of the model is presented. C1 FERMI NATL ACCELERATOR LAB,NASA,CTR ASTROPHYS,BATAVIA,IL 60510. RP ELIZALDE, E (reprint author), UNIV BARCELONA,FAC PHYS,DEPT ECM,DIAGONAL 647,E-08028 BARCELONA,SPAIN. NR 42 TC 16 Z9 16 U1 0 U2 0 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0035-8711 J9 MON NOT R ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD JAN 15 PY 1992 VL 254 IS 2 BP 247 EP 256 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA GZ103 UT WOS:A1992GZ10300006 ER PT J AU GRAMSCH, E LYNN, KG WEBER, M DECHILLO, B MCWILLIAMS, JR AF GRAMSCH, E LYNN, KG WEBER, M DECHILLO, B MCWILLIAMS, JR TI SILICON PIN PHOTODETECTORS IN HIGH-RESOLUTION NUCLEAR SPECTROSCOPY SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB The performance of silicon PIN diodes for use in X- and gamma-ray spectroscopy has been measured with a specially designed hybrid preamplifier. Our results show an ENC of 360 for a 10 x 10 mm2 photodiode. When the photodiode is coupled to a CsI(Tl) scintillator, we obtain 5.6% at FWHM for the 662 keV gamma ray of the Cs-137 source. Theoretical as well as experimental considerations are suggested to improve the performance of these detectors. C1 EV PROD,REMSENBURG,NY 11960. RP GRAMSCH, E (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. OI Gramsch, Ernesto/0000-0002-6787-7355 NR 6 TC 14 Z9 16 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JAN 15 PY 1992 VL 311 IS 3 BP 529 EP 538 DI 10.1016/0168-9002(92)90651-J PG 10 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HB138 UT WOS:A1992HB13800015 ER PT J AU RODRICKS, B BRIZARD, C AF RODRICKS, B BRIZARD, C TI PROGRAMMABLE CCD IMAGING-SYSTEM FOR SYNCHROTRON RADIATION STUDIES SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID DETECTORS AB A real-time imaging system for the detection of photons from the infrared to X-ray region of the electromagnetic spectrum has been developed. The active detection element in the system is a charge coupled device (CCD). The system, based on the Computer Automated Measurement And Control (CAMAC) modular IEEE 583 standard in which all modules are programmable, allows one to use the detector in many modes, as described below. Further, the programmability also enables one to easily change the waveform shapes and timings vs the readout requirements of CCDs from different vendors. Three different CCDs with radically different readout timings and waveforms have been tested. The CCD that is characterized and described in this paper is the TC 215 manufactured by Texas Instruments (TI). Uniformity, charge transfer efficiency (CTE), linearity and sensitivity measurements have been carried out using visible light. Preliminary data obtained from a time-resolved experiment performed at the NSLS X6 beamline is shown and potential time-resolved experiments that are feasible are described. RP RODRICKS, B (reprint author), ARGONNE NATL LAB,ADV PHOTON SOURCE,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 19 TC 3 Z9 3 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JAN 15 PY 1992 VL 311 IS 3 BP 613 EP 619 DI 10.1016/0168-9002(92)90662-N PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HB138 UT WOS:A1992HB13800026 ER PT J AU BEACH, R DAVIN, J MITCHELL, S BENETT, W FREITAS, B SOLARZ, R AVIZONIS, P AF BEACH, R DAVIN, J MITCHELL, S BENETT, W FREITAS, B SOLARZ, R AVIZONIS, P TI PASSIVELY Q-SWITCHED TRANSVERSE-DIODE-PUMPED ND3+-YLF LASER-OSCILLATOR SO OPTICS LETTERS LA English DT Article ID MIRRORS AB The design and performance of a diode-pumped Nd3+:YLF laser oscillator is described. A simple transverse-pump geometry in which a lensing duct efficiently couples the two-dimensional diode-pump array radiation to the YLF rod is employed. Using a color-center LiF crystal as a passive Q switch, we have produced burst-mode pulse trains that have a total energy of 115 mJ at a 30-Hz pulse-repetition frequency. The Q-switched pulse-train energy is 71% of the optimized free-lasing pulse energy, which is 163 mJ. Using an unstable cavity with a graded-reflectivity output coupler, we have generated Q-switched pulses that have 12-ns duration and near-diffraction-limited spatial profiles. C1 ROCKWELL INT CORP,SEAL BEACH,CA 90740. RP BEACH, R (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,POB 5508,LIVERMORE,CA 94550, USA. NR 10 TC 26 Z9 26 U1 0 U2 2 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD JAN 15 PY 1992 VL 17 IS 2 BP 124 EP 126 DI 10.1364/OL.17.000124 PG 3 WC Optics SC Optics GA HA461 UT WOS:A1992HA46100012 PM 19784250 ER PT J AU DICICCO, DS KIM, D ROSSER, R SUCKEWER, S AF DICICCO, DS KIM, D ROSSER, R SUCKEWER, S TI 1ST STAGE IN THE DEVELOPMENT OF A SOFT-X-RAY REFLECTION IMAGING MICROSCOPE IN THE SCHWARZSCHILD CONFIGURATION USING A SOFT-X-RAY LASER AT 18.2 NM SO OPTICS LETTERS LA English DT Article ID MAXIMUM AB We present results that demonstrate the proof of principle of a soft-x-ray reflection imaging microscope in the Schwarzschild configuration. A soft-x-ray laser operating at 18.2 nm was used as the x-ray source. Mo/Si multilayer mirrors with a normal-incidence reflectivity of approximately 20% per surface at 18.2-nm wavelength were used in the Schwarzschild objective. C1 PRINCETON UNIV,DEPT MECH & AEROSP ENGN,PRINCETON,NJ 08544. PRINCETON XRAY LASER INC,MONMOUTH JUNCTION,NJ 08852. RP DICICCO, DS (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08544, USA. NR 17 TC 47 Z9 51 U1 0 U2 4 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD JAN 15 PY 1992 VL 17 IS 2 BP 157 EP 159 DI 10.1364/OL.17.000157 PG 3 WC Optics SC Optics GA HA461 UT WOS:A1992HA46100023 PM 19784261 ER PT J AU MCHENRY, ME LESSURE, HS MALEY, MP COULTER, JY TANAKA, I KOJIMA, H AF MCHENRY, ME LESSURE, HS MALEY, MP COULTER, JY TANAKA, I KOJIMA, H TI SYSTEMATICS OF FLUX JUMPS AND THE STABILIZING EFFECT OF FLUX CREEP IN A LA1.86SR0.14CUO4 SINGLE-CRYSTAL SO PHYSICA C LA English DT Article ID CRITICAL CURRENTS; SUPERCONDUCTORS; YBA2CU3O7; TRANSPORT AB Flux jumps have been observed in a large (138 mg) single crystal of La1.86Sr0.14CuO4. Both complete and incomplete flux jumps are observed with the energy dissipated by complete flux jumps consistent with temperature rises to nearly T(c). The systematics of these flux jumps with respect to field history, temperature and the time duration of the hysteresis measurements are reported. The field at which flux jumps first occur and their subsequent spacing are not consistent with a simple adiabatic theory of flux jumps for our experimental conditions. Instead, the crystal is observed to be stabilized against flux jumps by flux creep which occurs during the time interval over which field steps are accomplished as well as during imposed time intervals between field steps. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. YAMANASHI UNIV,INST ORGAN SYNTH,KOFU,YAMANASHI 400,JAPAN. RP MCHENRY, ME (reprint author), CARNEGIE MELLON UNIV,DEPT MET ENGN & MAT SCI,PITTSBURGH,PA 15213, USA. RI McHenry, Michael/B-8936-2009; Tanaka, Isao/D-1519-2012 NR 23 TC 41 Z9 41 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD JAN 15 PY 1992 VL 190 IS 4 BP 403 EP 414 DI 10.1016/0921-4534(92)90699-D PG 12 WC Physics, Applied SC Physics GA HG138 UT WOS:A1992HG13800003 ER PT J AU LIANG, YH DABROWSKI, B KIMBALL, CW PENG, WM DUNLAP, BD AF LIANG, YH DABROWSKI, B KIMBALL, CW PENG, WM DUNLAP, BD TI MAGNETIC-BEHAVIOR OF 3D DOPANTS IN SUPERCONDUCTING (REBA2CU3-XFEXO7+DELTA)-FE-57 (RE = DY, ER) SO PHYSICA C LA English DT Article ID ORDER; DIFFRACTION; SYSTEMS; NEUTRON AB Mossbauer studies on Fe-57-doped superconducting REBa2Cu3O7+delta (RE = Er, Dy) were made as a function of temperature for x = 0.15 and 0.30. The magnetic behavior of the 3d dopants, which mainly occupy Cu(1) sites, undergoes antiferromagnetic ordering which is coexistent with superconductivity at low temperature. The dimensionality of the magnetic interaction changes from 2D to 3D when the rare earth changes from Er to Dy. The line-widths of the Mossbauer subspectra are characteristic of magnetic fluctuation behavior in the vicinity of a phase transition. Combining these results with those of Fe-doped Y-123 (pseudo 1D) and Gd (3D), the magnitude of the rare earth moments appears to be strongly correlated with the dimensionality of the magnetic interaction of Fe dopants in these compounds. However, the Mossbauer spectrum for Gd-155 in GdBa2Cu2.85Fe0.15O7 + delta (T(N)(Fe) approximately 14 K) shows no magnetic order at 4.9 K. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. RP LIANG, YH (reprint author), NO ILLINOIS UNIV,DE KALB,IL 60115, USA. NR 31 TC 2 Z9 2 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD JAN 15 PY 1992 VL 190 IS 4 BP 415 EP 426 PG 12 WC Physics, Applied SC Physics GA HG138 UT WOS:A1992HG13800004 ER PT J AU KIJIMA, N GRONSKY, R XIANG, XD VAREKA, WA ZETTL, A CORKILL, JL COHEN, ML AF KIJIMA, N GRONSKY, R XIANG, XD VAREKA, WA ZETTL, A CORKILL, JL COHEN, ML TI CRYSTAL-STRUCTURES OF STAGE-N IODINE-INTERCALATED COMPOUNDS IBI2NSR2NCANCU2NOX SO PHYSICA C LA English DT Article AB The crystal structure of stage-3 iodine-intercalated superconducting IBi6Sr6Ca3Cu6Ox has been determined by transmission electron microscopy to belong to the space group Pma2 with lattice parameters a = 5.4 angstrom, b = 5.4 angstrom and c = 49.4 angstrom. Iodine atoms intercalated between every three Bi-O bilayers expand the distance between the Bi-O layers by 3.6 angstrom and alter the atomic stacking across Bi-O layers from the staggered configuration characteristic of host superconducting Bi2Sr2CaCu2Ox to an aligned configuration characteristic of stage-1 iodine-intercalated superconducting IBi2Sr2CaCu2Ox. Higher-stage intercalation has also been observed as stacking faults which predominantly contain both stage-2 and stage-3 phases. The space groups and c-axis dimensions of the higher-stage phases have been deduced to be Pma2 with c = 3.6 + 15.3n angstrom when stage number n is odd, and Bbmb with c = 2 (3.6 + 15.3n) angstrom when n is even. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,NATL CTR ELECTRON MICROSCOPY,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. RI Xiang, Xiaodong/A-9445-2012; Zettl, Alex/O-4925-2016; Xiang, Xiaodong/A-5936-2017 OI Zettl, Alex/0000-0001-6330-136X; NR 6 TC 12 Z9 12 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD JAN 15 PY 1992 VL 190 IS 4 BP 597 EP 605 DI 10.1016/0921-4534(92)90722-O PG 9 WC Physics, Applied SC Physics GA HG138 UT WOS:A1992HG13800026 ER PT J AU YU, G LEE, CH HEEGER, AJ CHEONG, SW FISK, Z AF YU, G LEE, CH HEEGER, AJ CHEONG, SW FISK, Z TI PHOTOEXCITATION OF SINGLE-CRYSTALS OF LA2CUO4+DELTA NEAR THE METAL-INSULATOR-TRANSITION SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS LA English DT Article ID CONDUCTIVITY AB Transient photoconductivity (sigma(ph)) experiments have been carried out in single crystals of insulating La2CuO4 + delta near the metal-insulator transition (delta almost-equal-to 1-2%). The time evolution of the sigma(ph) changes dramatically with light intensity (I(L)). At low I(L), sigma(ph) is characterized by power law time decay, t(-alpha), in the nanosecond time regime, and the exponent, alpha, decreases significantly with increasing I(L). As I(L) increases to 5 x 10(15) photons/cm2, sigma(ph) reaches approximately 15 S/cm, and the lifetime of the conducting state is enhanced by more than two orders of magnitude: sigma(ph) exhibits a delayed peak centered at approximately 30 ns, followed by exponential decay with time constant of approximately 360 ns. The data reveal a continuous distribution of localized electronic states above the (hole) mobility edge: the M-I transition is achieved when the Fermi level is shifted away from the localized states and across the mobility edge either by chemical doping or by photo-excitation. The time evolution of sigma(ph) at high I(L) implies the formation of metastable metallic droplets after photo-excitation. C1 UNIV CALIF SANTA BARBARA, DEPT PHYS, SANTA BARBARA, CA 93106 USA. UNIV CALIF LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. RP YU, G (reprint author), UNIV CALIF SANTA BARBARA, INST POLYMERS & ORGAN SOLIDS, SANTA BARBARA, CA 93106 USA. RI Lee, Changhee/A-2471-2009 OI Lee, Changhee/0000-0003-2800-8250 NR 30 TC 15 Z9 15 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 EI 1873-2143 J9 PHYSICA C JI Physica C PD JAN 15 PY 1992 VL 190 IS 4 BP 563 EP 568 DI 10.1016/0921-4534(92)90719-S PG 6 WC Physics, Applied SC Physics GA HG138 UT WOS:A1992HG13800023 ER PT J AU PRADO, CPC OLAMI, Z AF PRADO, CPC OLAMI, Z TI INERTIA AND BREAK OF SELF-ORGANIZED CRITICALITY IN SANDPILE CELLULAR-AUTOMATA MODELS SO PHYSICAL REVIEW A LA English DT Article AB We present a sandpile cellular-automata model that includes the effects of inertia. The model is studied in both one and two dimensions. We find that the model changes the normal self-organized critical behavior, creating a dominance of big events in the system and leading to very large fluctuations in the mass of the system. We show that those changes of behavior can only be noticed in large sandpiles, which is in accord with previous experimental results. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP PRADO, CPC (reprint author), UNIV SAO PAULO,IST FIS,CEP 014918,BR-20516 SAO PAULO,BRAZIL. RI Prado, Carmen/F-2469-2012 NR 8 TC 45 Z9 45 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 15 PY 1992 VL 45 IS 2 BP 665 EP 669 DI 10.1103/PhysRevA.45.665 PG 5 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HB019 UT WOS:A1992HB01900018 ER PT J AU HUANG, LK FINKENTHAL, M WROBLEWSKI, D MOOS, HW WEST, WP PHILLIPS, PE SING, DC AF HUANG, LK FINKENTHAL, M WROBLEWSKI, D MOOS, HW WEST, WP PHILLIPS, PE SING, DC TI SAFETY FACTOR MEASUREMENTS ON THE MAGNETIC AXIS OF THE TEXAS EXPERIMENTAL TOKAMAK PLASMA IN OHMIC AND ELECTRON-CYCLOTRON-RESONANCE HEATED DISCHARGES SO PHYSICAL REVIEW A LA English DT Article ID EFFECT POLARIMETRY; PELLET INJECTION; FIELD; POLARIZATION; SAWTEETH; STABILIZATION; PROFILES; LINE AB Analysis of the circular polarization of a spectral line emission inside plasmas provides a measurement of the poloidal magnetic field on the Texas experimental tokamak (TEXT). Three sets of different polarimeters, using, respectively, the Ti XVII 3834-angstrom line of the intrinsic titanium impurity and the Li I 6708-angstrom line of a monoenergetic lithium beam, were developed and operated on TEXT. The safety factor q on the magnetic axis, determined from the measured magnetic field, was found to be near unity in all cases of Ohmically heated sawtoothing and nonsawtoothing discharges, and significantly below unity in the case of electron-cyclotron-resonance heating at the plasma center for high edge q discharges. C1 GEN ATOM CO,SAN DIEGO,CA 92138. HEBREW UNIV JERUSALEM,RACAH INST PHYS,JERUSALEM,ISRAEL. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP HUANG, LK (reprint author), JOHNS HOPKINS UNIV,BALTIMORE,MD 21218, USA. NR 42 TC 2 Z9 2 U1 0 U2 4 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 15 PY 1992 VL 45 IS 2 BP 1089 EP 1097 DI 10.1103/PhysRevA.45.1089 PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HB019 UT WOS:A1992HB01900062 ER PT J AU YU, LH KRINSKY, S GLUCKSTERN, RL VANZEIJTS, JBJ AF YU, LH KRINSKY, S GLUCKSTERN, RL VANZEIJTS, JBJ TI EFFECT OF WIGGLER ERRORS ON FREE-ELECTRON-LASER GAIN SO PHYSICAL REVIEW A LA English DT Article AB For a free-electron laser (FEL) operating in the exponential regime before saturation, we present an analytic description of the effect on the gain of longitudinal velocity variations arising from wiggler field errors. The average gain reduction and the width of the output power distribution are expressed in terms of the mean-square average of the ponderomotive phase shift per gain length. A scheme for correcting the electron trajectory using position monitors and dipole correctors is analyzed. Our work is directly applicable to the design of FEL amplifiers, and the results are encouraging for their feasibility. C1 UNIV MARYLAND,DEPT PHYS,COLLEGE PK,MD 20742. RP YU, LH (reprint author), BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE,UPTON,NY 11973, USA. NR 13 TC 22 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 15 PY 1992 VL 45 IS 2 BP 1163 EP 1176 DI 10.1103/PhysRevA.45.1163 PG 14 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HB019 UT WOS:A1992HB01900070 ER PT J AU PIESTRUP, MA BOYERS, DG PINCUS, CI LI, QA HALLEWELL, GD MORAN, MJ SKOPIK, DM SILZER, RM MARUYAMA, XK SNYDER, DD ROTHBART, GB AF PIESTRUP, MA BOYERS, DG PINCUS, CI LI, QA HALLEWELL, GD MORAN, MJ SKOPIK, DM SILZER, RM MARUYAMA, XK SNYDER, DD ROTHBART, GB TI OBSERVATION OF SOFT-X-RAY SPATIAL COHERENCE FROM RESONANCE TRANSITION RADIATION SO PHYSICAL REVIEW A LA English DT Article ID MEDIUM-ENERGY ELECTRONS; LASER AB We have observed the spatial distribution of coherent or resonance transition radiation (RTR) in the soft-x-ray region of the spectrum (1-3 keV). Resonance transition radiators were constructed and tested at two accelerators using electron-beam energies ranging from 50 to 228 MeV. These radiators emitted soft x rays in a circularly symmetrical annulus with a half-angle divergence of 2.5-9.0 mrad. The angle of peak emission was found to increase with electron-beam energy, in contrast to the incoherent case, for which the angle of emission varied inversely with electron-beam energy. By careful selection of foil thickness and spacing, one may design radiators whose angle of emission varies over a range of charged-particle energies. A particular RTR mode (r = m = 1) was found to give a sharp annular ring that becomes more accentuated as the number of foils is increased. The RTR effect has application in particle detection, beam diagnostics, x-ray source brightness enhancement, and x-ray free-electron-laser emission. C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV SASKATCHEWAN,SASKATCHEWAN ACCELERATOR LAB,SASKATOON S7N 0W0,SASKATCHEWAN,CANADA. USN,POSTGRAD SCH,MONTEREY,CA 93943. SOFTWARE SCI INC,BRISBANE,CA 94005. RP PIESTRUP, MA (reprint author), ADELPHI TECHNOL INC,285 HAMILTON AVE,SUITE 430,PALO ALTO,CA 94301, USA. NR 34 TC 34 Z9 34 U1 1 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 15 PY 1992 VL 45 IS 2 BP 1183 EP 1196 DI 10.1103/PhysRevA.45.1183 PG 14 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HB019 UT WOS:A1992HB01900072 ER PT J AU MIN, BJ CHAN, CT HO, KM AF MIN, BJ CHAN, CT HO, KM TI 1ST-PRINCIPLES TOTAL-ENERGY CALCULATION OF GALLIUM NITRIDE SO PHYSICAL REVIEW B LA English DT Article ID BAND STRUCTURES; GAN; PSEUDOPOTENTIALS; SEMICONDUCTORS; METALS AB A first-principles total-energy calculation is performed on gallium nitride (GaN). The equilibrium lattice parameters, the bulk modulus, and the cohesive energy of GaN in the wurtzite structure is calculated and compared with experimental values. In our calculation, the ground state of GaN is a zinc-blende structure, and the difference between these two phases is around 1.4 mRy. C1 IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS & ASTRON, AMES, IA 50011 USA. RP IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. NR 20 TC 99 Z9 102 U1 0 U2 10 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 15 PY 1992 VL 45 IS 3 BP 1159 EP 1162 DI 10.1103/PhysRevB.45.1159 PG 4 WC Physics, Condensed Matter SC Physics GA HA081 UT WOS:A1992HA08100010 ER EF