Results 241 to 250 of about 1,022,511 (278)

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 ...
, Horowitz, , Piekarewicz
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Pionic effects in quasielastic electron scattering

Nuclear Physics A, 1990
Abstract Quasielastic electron scattering from nuclei at high momentum transfer and energy loss is approached using a model which incorporates specific classes of effects arising from the exchange of pions between nucleons in the nucleus. Building on the (purely nucleonic) relativistic Fermi gas responses, pionic effects in 1p1h correlation and meson
ALBERICO, Wanda Maria, T. W. Donnelly, MOLINARI, Alfredo   +2 more
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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 ...
P S, Blank, R B, Tishler, F D, Carlson
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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.
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Quasielastic scattering of Li and Be on C

Nuclear Physics A, 2000
Abstract The quasielastic 11 Li, 12 Be + 12 C scattering at E/A≃60 MeV has been studied by adding a fitted polarisation potential to the folding model potential derived from 9 Li, 12 Be - 12 C and neutron- 12 C phenomenological optical potentials. For 11 Li + 12 C scattering
J.C. Pacheco, N. Vinh Mau
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Internal Viscosity and Quasielastic Scattering

The Journal of Chemical Physics, 1971
The hypotheses leading to internal viscosity of polymers are formulated in terms of the neutron incoherent quasielastic scattering law. The mean squared displacement, calculated in the free draining limit, is obtained as an analytical function of the internal viscosity parameter and is shown to decrease uniformly as this parameter increases.
R. Bidaux, J. P. Cotton, B. Farnoux, G. Jannink   +3 more
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Quasielastic Electron Scattering on 65Cu

AIP Conference Proceedings, 2007
The pioneer method for extraction of quasielastic part from the spectrum of scattered electrons is proposed. The essence of the method is in simultaneous multipole analysis of the mix of quasielastic and resonant formfactors. The identification of resonant peaks and quasielastic part of the formfactor have been held not in scattered electron spectra ...
V. Denyak, S. A. Paschuk, H. R. Schelin, V. Khvastunov   +3 more
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Quasielastic light scattering in silicon

Journal of Physics C: Solid State Physics, 1984
An investigation of the origin of quasielastic light scattering from silicon surfaces, first observed by Sandercock (1972, 1978) is described. Measurements have been made of the dependence of the quasielastic spectrum upon temperature, wavevector, doping level, and polarisation and intensity of incident light.
M W Anderson, S M Lindsay, R T Harley
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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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Quasielastic light scattering in silicon

Physical Review B, 2000
A dominant, broad central mode in the Brillouin spectrum of silicon was first reported by Sandercock in 1978. This feature was later ascribed to a two-phonon difference scattering process. However, the issue of quasielastic scattering in silicon has remained a major outstanding problem in Brillouin scattering, because similar central modes in other ...
Stoddart, P. R., Comins, J. D.
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