Results 221 to 230 of about 86,100 (274)

Quasielastic neutron scattering by superionic strontium chloride

Journal of Physics C: Solid State Physics, 1978
The scattering, from powder and single crystal samples, appears only above the superionic transition temperature, 1000K. The integrated intensity is found to be strongly dependent on the direction and magnitude of the scattering vector, Q, (which suggests the scattering is coherent) but does not exhibit the periodicity of the reciprocal lattice.
M H Dickens, M T Hutchings, J Kjems, R E Lechner   +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, 2001
Quasi-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.
R. Mukhopadhyay, S. Mitra, S.K. Paranjpe, B.A. Dasannacharya   +3 more
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Quasielastic Neutron Scattering from α-AgI

1978
In this contribution we will present new experimental quasielastic neutron scattering data on α-AgI along with an interpretation of these data in terms of a simple model+. As has already been discussed in the introductory part of this session, α-AgI may be visualized to a first approximation as a sea of mobile silver ions within a rigid b.c.c.
K. Funke, G. Eckold, R. E. Lechner
openaire   +1 more source

Quasielastic neutron scattering in copper halides

Physica B: Condensed Matter, 1997
Abstract 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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6 Coherent quasielastic neutron scattering

2000
Abstract QENS on diffusing atoms with a sizable coherent neutron scattering cross section yields information on interference effects and correlated motion contained in the coherent scattering function S(Q, ω). As an introduction to this complex situation, this chapter begins by describing first coherent elastic scattering due to short ...
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Quasielastic neutron scattering study of acidic solutions

Journal of Physics: Condensed Matter, 1990
The 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 ...
D Davagnat, J C Lassegues
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Polarization analysis techniques for quasielastic neutron scattering

Physica B: Condensed Matter, 1992
A 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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Quasielastic and Inelastic Neutron Scattering

1982
The 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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Internal motions of actin characterized by quasielastic neutron scattering

European Biophysics Journal, 2011
Quasielastic 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, PLAZANET, Marie Geneviève, Fumiko Matsumoto, Toshiro Oda   +3 more
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5 Incoherent quasielastic neutron scattering

2000
Abstract In the case of spatially limited jump diffusion, the incoherent scattering function consists of an elastic and a quasielastic part, and the fraction of elastic intensity is called the incoherent structure factor, EISF. This chapter evaluates different scenarios and the corresponding EISFs.
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