Results 151 to 160 of about 846,899 (201)

Neutron quasielastic scattering by (CH3NH3)5Bi2Cl11

Physica B: Condensed Matter, 1997
Abstract (CH3NH3)+-cation rotation in crystalline (CH3NH3)5Bi2Cl11 was studied by the QNS. The following (no doubt simplified) models were considered: 1. 1. All cations are equivalent and rotate as a whole around C-N axes 2. 2. Majority of cations behave as in point (1) and the remaining ones do not move (for the neutron observation window).
R Jakubas, J.A Janik, J Krawczyk, J Mayer, T Stanek, O Steinsvoll   +5 more
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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 neutron scattering by hydrogen in niobium

Journal of Physics and Chemistry of Solids, 1970
Abstract The diffusion of hydrogen in niobium has been studied by quasielastic neutron scattering measuring the width of the quasi-elastic line as a function of the scattering vector. The measurements have been performed at concentrations of 3·2 at.% at 200° and 300°C, and at 33 at.% hydrogen between 100° to 300°C for many temperatures, especially ...
W. Gissler, G. Alefold, T. Springer
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Dynamics of water in a molecular sieve by quasielastic neutron scattering

The Journal of Chemical Physics, 2005
We have investigated the dynamics of water confined in a molecular sieve, with a cylindrical pore diameter of 10Å, by means of quasielastic neutron scattering (QENS). Both the incoherent and coherent intermediate scattering functions I(Q,t) were determined by time-of-flight QENS and the neutron spin-echo technique, respectively. The results show that I(
J, Swenson, H, Jansson, W S, Howells, S, Longeville   +3 more
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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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Bayesian analysis of quasielastic neutron scattering data

Physica B: Condensed Matter, 1992
We 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.
D.S. Sivia, C.J. Carlile, W.S. Howells, S. König   +3 more
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Quasielastic and inelastic neutron scattering on hydrated calcium silicate pastes

The Journal of Chemical Physics, 2004
Using the inverse geometry spectrometer QENS at the Intense Pulsed Neutron Source of the Argonne National Laboratory, we collected quasielastic and inelastic neutron scattering spectra of hydrated tricalcium and dicalcium silicate, the main components of ordinary Portland cement.
A. FARAONE, FRATINI, EMILIANO, BAGLIONI, PIERO, S. H. CHEN   +3 more
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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 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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Quasielastic and Inelastic Neutron Scatterings of Liquid Tellurium

Journal of the Physical Society of Japan, 1994
We 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, Takuya Tsuzuki, Makoto Yao, Yukinobu Kawakita, Kaoru Shibata, Takashi Kamiyama, Masakatsu Misawa, Kenji Suzuki   +7 more
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