Results 201 to 210 of about 8,142 (229)
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Inelastic and quasielastic neutron scattering
Current Opinion in Solid State and Materials Science, 1997Inelastic 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 neutron scattering study on disaccharide aqueous solutions
Physica B: Condensed Matter, 2001Quasielastic neutron scattering measurements performed at ISIS by the IRIS spectrometer (RAL, UK) reveal new perspectives for understanding the peculiarities of interactions between disaccharides and water. In particular the comparison between the homologous disaccharides trehalose, maltose and sucrose allows to put in evidence that, although the ...
Magazù +11 more
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Internal motions of actin characterized by quasielastic neutron scattering
European Biophysics Journal, 2011Quasielastic neutron scattering (QENS) experiments were carried out on powders of F-actin and G-actin hydrated with D(2)O to characterize the internal dynamics on the picosecond time scale and the Ångstrom length scale. To investigate the effects of hydration, the measurements were done on samples at hydration ratio (h) of 0.4 (mg D(2)O/mg protein ...
Satoru Fujiwara +3 more
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Bayesian analysis of quasielastic neutron scattering data
Physica B: Condensed Matter, 1992We consider the analysis of quasielastic neutron scattering data from a Bayesian point-of-view. This enables us to use probability theory to assess how many quasielastic components there is most evidence for in the data, as well as providing an optimal estimate of their parameters.
S. König +3 more
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Quasielastic neutron scattering facility at Dhruva reactor
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2001Quasi-elastic neutron scattering is a powerful experimental tool for studying the various dynamical motions in solids and liquids. In this paper, we have described the salient features of the quasi-elastic neutron spectrometer in operation at Dhruva reactor at Trombay, India.
S. Mitra +3 more
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Quasielastic neutron scattering in copper halides
Physica B: Condensed Matter, 1997Abstract Interest in the copper halides arises from their superionic or fast-ion conducting properties, i.e., the conductivity in the high-temperature solid is comparable to that in the melt. A further interest is that the changes are accompanied by structural phase changes.
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Quasielastic and Inelastic Neutron Scattering
1982The neutron is a heavy particle compared to photons and therefore scattering spectroscopy using neutrons covers a unique range of frequency-spatial correlations. For inelastic experiments the far infra-red spectroscopic range up to ∼1000 cm-1 may be observed with sizeable wave vector transfers and phonon dispersion curves mapped out.
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Quasielastic neutron scattering study of acidic solutions
Journal of Physics: Condensed Matter, 1990The aim of the work is to characterize by quasielastic neutron scattering (QNS) not only the usual transport processes occurring in aqueous solution but also something specific to the high proton conductivity in acidic solutions. The addition of a strong acid such as H2SO4 or HNO3 to water provokes a marked slowing down of the mean translational ...
J C Lassegues, D Davagnat
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Diffusive motions in crystalline AlCuNi by neutron quasielastic scattering
Physica B: Condensed Matter, 2001Quasi-elastic neutron scattering experiments have been performed on the Al50Cu35Ni15 alloy on the IRIS spectrometer at ISIS and on the MIBEMOL spectrometer at LLB, Saclay. The aim was to investigate if atomic hopping motions are restricted to occur in systems with quasicrystalline local order.
Howells, W.S +3 more
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Polarization analysis techniques for quasielastic neutron scattering
Physica B: Condensed Matter, 1992A description of quasielastic scattering and polarization analysis is followed by a discussion of the combination of both techniques, which can play an important role. It is shown how an optimized procedure would appear for various samples from very different fields of physics.
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