Results 181 to 190 of about 28,456 (214)
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Quasi-elastic neutron scattering of benzene in Na-mordenite
Surface Science, 1984Abstract The rotational and translational dynamics of benzene adsorbed in Na-mordenite have been studied by incoherent quasi-elastic neutron scattering. The measurements were performed at two benzene coverages at 300, 400 and 450 K. The observed quasi-elastic broadenings are described by a uniaxial rotational model about the six-fold axis of benzene.
H. Jobic, M. Bee, A. Renouprez
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Quasi-elastic neutron scattering study of hydrated DNA
Chemical Physics, 2003Dynamics of water around DNA molecules was studied by incoherent quasi-elastic neutron scattering. The mean residence time is about 10 times higher than for liquid water indicating that mobility of water adsorbed on DNA is reduced very significantly. The mean residence time increases from 10 ps for the sample with 2.5 g water/g DNA to 18 ps for a water
Beta, I. A. +4 more
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Dynamics of protein hydration by quasi-elastic neutron scattering
Nature, 1978THE importance of water and its properties for biological systems makes the analysis of the dynamics of protein hydration of special interest1–3. It has long been recognised2 that neutron scattering can, in principle, provide the most complete description of molecular motions in hydrated biopolymers.
JOHN RANDALL +3 more
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Proton-neutron quasi-elastic scattering at 991 MeV
Il Nuovo Cimento A, 1967The proton-proton and proton-neutron elastic-scattering angular distributions have been measured at 1.69 GeV/c (=991 MeV) from 14.5° to 150° c.m.s. using fast scintillation counters in conjunction with magnetic-momentum analysis. In both cases, the forward elastic cross-sections are considerably in excess of their respective optical-theorem minima, the
T. A. Murray +4 more
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Quasi-elastic scattering of neutrons by a water dispersion of nanodiamonds
Physics of the Solid State, 2010Data on quasi-elastic neutron scattering by a water dispersion of nanodiamonds and a pure water as a supporting system has been analyzed. The observed difference in the quasi-elastic neutron scattering spectra is interpreted using two different approaches developed to date for describing the behavior of a solvent in the cases of low and moderate ...
N. M. Blagoveshchenskiĭ +3 more
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Quasi-elastic scattering in vitreous silica: A Raman and neutron scattering study
Journal of Non-Crystalline Solids, 2005Measurements of Raman scattering from vitreous silica (spectrosil) in the temperature range 12–1200 K are analyzed and compared with inelastic neutron scattering measurements done on the same sample. The results show a temperature dependence of the quasi-elastic scattering.
Fontana, Aldo +5 more
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Incoherent scattering law for neutron quasi-elastic scattering in liquid crystals
Molecular Physics, 1975The incoherent scattering law for neutron quasi-elastic scattering in liquid crystals is calculated using a classical formalism including (anisotropic) self-diffusion, rotational motion along the long molecular axis and short time vibrational behaviour. Explicit expressions are given for oriented as well as for unoriented liquid crystals.
A. J. Dianoux, F. Volino, H. Hervet
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Quasielastic and inelastic neutron scattering in macromolecular solutions
Physical Review A, 1990We performed both quasielastic and inelastic neutron scattering, the latter extending to 1000 meV exchange energy, in pure water and in a solution containing 10% lysozyme by weight. The results obtained are discussed in the framework of a structured model of the solution, as given by many previous investigations made with optical techniques.
GIORDANO, Rita +3 more
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Discussion of the Quasi Elastic Scattering of Neutrons in Incoherent Liquids
Physics and Chemistry of Liquids, 1968Abstract A critical discussion of the quasi-elastic scattering of neutrons by incoherent (hydrogenous) liquids is presented. Using the line shape expression a comparative discussion of several phenomenological models has been undertaken. Extension of the Singwi-Sjolander zero phonon expression, for the jump-diffusion model, so as to include the one ...
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Diffusion studies using quasi-elastic neutron scattering
2000Quasi-elastic neutron scattering allows to study molecular diffusion in condensed or adsorbed phases. Diffusion coefficients can be derived, without a model, over space scales where molecular motion follows Fick’s law. Furthermore, using jump diffusion models, one can determine characteristic times and distances for the elementary jumps.
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