Results 261 to 270 of about 1,006,658 (282)

Quasielastic Electron Scattering and Vacuum Polarization

Physical Review Letters, 1989
The longitudinal response function for quasielastic electron scattering from /sup 12/C and /sup 40/Ca at a momentum transfer q = 550 MeV is calculated in a relativistic random-phase approximation (RPA). The particle-hole response is calculated exactly in the finite system while vacuum-polarization effects are included in a local-density approximation ...
Jorge Piekarewicz, Charles Horowitz
openaire   +3 more sources

Dynamics of Propane in Nanoporous Silica Aerogel: A Quasielastic Neutron Scattering Study

, 2015
Molecular motion of hydrocarbons under confinement exhibits several peculiarities and has important implications in industries like gas recovery. A quasielastic neutron scattering (QENS) study of the dynamics of propane in nanoporous silica aerogel was ...
S. Gautam, Tingting Liu, G. Rother, N. Jalarvo, E. Mamontov, Susan P Welch, J. Sheets, M. Droege, D. Cole   +8 more
semanticscholar   +1 more source

Inelastic and quasielastic neutron scattering

Current Opinion in Solid State and Materials Science, 1997
Inelastic neutron scattering is a technique for measuring the dynamics of condensed matter on a microscopic scale. Several dynamical regimes can be probed, including atomic momentum distributions, vibrations, and relaxation phenomena. Recent work has been carried out to investigate the dynamics of disordered materials.
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BACKWARD ANGLE STRUCTURE IN THE 20Ne+28Si QUASIELASTIC SCATTERING

, 2013
New data for the quasielastic scattering of 20Ne from a 28Si target at incident energies of 42.5 MeV and 52.3 MeV and for the 28Si(20Ne, 24Mg)24Mg, 28Si(20Ne, 16O)32S and 28Si(20Ne, 12C)36Ar transfer reactions at 52.3 MeV are reported.
O. Sgouros, V. Soukeras, A. Pakou, N. Patronis, K. Zerva, N. Keeley, I. Strojek, A. Trzcińska, E. Piasecki, K. Rusek, E. Stiliaris, M. Mazzocco   +11 more
semanticscholar   +1 more source

Parity-violating quasielastic electron scattering

Physical Review C, 1993
The parity-violating asymmetry [ital A] is calculated for quasielastic electron scattering. We use a relativistic mean field model of the nuclear matter response. A Lorentz scalar mean field (which reduces the nucleon's mass) decreases [vert bar][ital A][vert bar] by a relatively large amount.
openaire   +3 more sources

Quasielastic light scattering microscope spectrometer

Applied Optics, 1987
We have developed a quasielastic light scattering microscope spectrometer from a commercially available instrument. The coherence requirements of microscope spectrometers have been examined, and our system performs in agreement with theory. Microscopic scattering volumes can be studied while still minimizing spatial averaging effects on the intensity ...
Francis D. Carlson, Roy B. Tishler, Paul S. Blank   +2 more
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Scaling in quasielastic electron scattering

AIP Conference Proceedings, 1988
The inclusive (e, e’) cross section on various nuclei in the quasielastic region (Q2/2Mν∼1) has recently been measured in the range 0.25≤Q2≤3.1. Analysis of these data in the plane‐wave impulse approximation allows extraction of a scaling function related to the nucleon momentum distribution.
openaire   +2 more sources

Quasielastic scattering by dilute polymer solutions

Journal of Polymer Science Part B: Polymer Physics, 1976
AbstractThe scattering law S(k,w) for dilute polymer solutions is obtained from Kirkwood's diffusion equation via the projection operator technique. The width Ω(k) of S(k,w) is obtained for all k without replacing the Oseen tensor by its average (as is done in the Rouse–Zimm model) using the “spring‐bead” model ignoring memory effects.
H. Gurol, Z. Akcasu
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Multi-component modeling of quasielastic neutron scattering from phospholipid membranes.

Journal of Chemical Physics, 2014
We investigated molecular motions in the 0.3-350 ps time range of D2O-hydrated bilayers of 1-palmitoyl-oleoyl-sn-glycero-phosphocholine and 1,2-dimyristoyl-sn-glycero-phosphocholine in the liquid phase by quasielastic neutron scattering.
U. Wanderlingh, Giovanna D'Angelo, C. Branca, V. Nibali, A. Trimarchi, S. Rifici, D. Finocchiaro, C. Crupi, J. Ollivier, H. D. Middendorf   +9 more
semanticscholar   +1 more source

Positron differential quasielastic scattering by molecules

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2002
Abstract An overview of relative differential cross section (DCS) measurements in the range 30–135° for quasielastic scattering (elastic scattering plus rotational and vibrational excitations) of 4–200 eV positrons by N 2 , O 2 , CO, CO 2 , N 2 O and CH 4 , along with recent measurements for C 2 H 2 and S 6 is reported. For N 2 , O 2 , CO and CH 4
C. K. Kwan, D. A. Przybyla, W. E. Kauppila, T. S. Stein   +3 more
openaire   +2 more sources