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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 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 ...
D Davagnat, J C Lassegues
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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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6 Coherent quasielastic neutron scattering
2000Abstract 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 and Inelastic Neutron Scatterings of Liquid Tellurium
Journal of the Physical Society of Japan, 1994We have carried out quasielastic neutron scattering measurements on liquid tellurium (l-Te) at 460°C, and inelastic neutron scattering measurements on trigonal tellurium (t-Te) at 400°C, supercooled l-Te at 400°C and l-Te at 467°C. The quasielastic scattering peak is comparatively narrow at momentum transfer Q =2.0 A -1 where the first peak of the ...
Hirohisa Endo +7 more
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Point-Defect Diffusion from Coherent Quasielastic Neutron Scattering
Physical Review Letters, 1985We outline a theory which suggests that the dynamics of point defects in crystals can be studied by coherent quasielastic neutron scattering. The theory assumes that the surrounding lattice distortion follows each defect instantaneously, and that the distortion fields of different defects can be linearly superposed.
, Gillan, , Wolf
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5 Incoherent quasielastic neutron scattering
2000Abstract 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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A high temperature high pressure cell for quasielastic neutron scattering
Review of Scientific Instruments, 2011We present our recent development of a high temperature high pressure cell for neutron scattering. Combining a water cooled Nb1Zr pressure cell body with an internal heating furnace, the sample environment can reach temperatures of up to 1500 K at a pressure of up to 200 MPa at the sample position, with an available sample volume of about 700 mm3.
Yang, Fan +4 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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Molecular dynamics of glucose in solution: A quasielastic neutron scattering study
The Journal of Chemical Physics, 2004The molecular dynamics of glucose dissolved in heavy water have been investigated at 280 K by the technique of quasielastic neutron scattering. The scattering was described by a dynamic structure factor that accounts for decoupled diffusive jumps and free rotational motions of the glucose molecules.
Luis J, Smith +4 more
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