Results 241 to 250 of about 176,667 (282)

Inelastic neutron scattering in SeTe glasses

Journal of Non-Crystalline Solids, 1990
Abstract Inelastic neutron scattering has been used to study the excitation spectra g(E) of a series of four SexTe1−x glasses, with x = 0.95, 0.90, 0.80, 0.70, at two temperatures, 100K and 200K. The low frequency spectra show a breakaway from an (energy)2 dependence for g(E) to a higher power dependence, which is typical of the density of states for
CARINI, Giuseppe, CUTRONI, Maria, DIANOUX AJ, GALLI, Giovanni, NEEDHAM LM, ROSENBERG HM   +5 more
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Inelastic neutron scattering from Sendust

Physical Review B, 1988
Inelastic neutron scattering experiments have been performed on a single crystal of Sendust (Fe/sub 2.94/Al/sub 0.38/Si/sub 0.68/) in order to study the spin dynamics below and above the ferromagnetic Curie temperature T/sub C/ = 794 +- 1 K. Below T/sub C/, clear ferromagnetic spin waves are observed up to the energy transfer of about 60 meV.
Yasutomo J. Uemura, Wisniewski A, Dobrzynski L, Stephen M. Shapiro, J. P. Wicksted   +4 more
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Inelastic Neutron Scattering

1986
Experiments with thermal neutrons are most useful in the study of lattice vibrations. The advantage stems from the basic nature of the neutron: The De Broglie wavelength of a thermal neutron is of the same order of magnitude as the interatomic distances in crystals, and the energy of a thermal neutron is of the same order as the energy of a lattice ...
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Inelastic Neutron Scattering in Iron

Physical Review, 1954
The gamma-ray spectrum from the inelastic scattering of $D\ensuremath{-}D$ neutrons in iron has been obtained using an unshielded single-crystal NaI spectrometer. A ring-type geometry permitted subtraction of the back-ground rate from the total rate: this yields a complex spectrum attributed to the inelastic scattering in iron.
T. M. Hahn, D. L. Lafferty, L. A. Rayburn   +2 more
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Inelastic neutron-deutron scattering

Nuclear Physics A, 1969
Abstract A theory of the charge exchange process d(n,p)2n is presented which is based on an earlier theory of slightly inelastic proton-deutron scattering. Calculations of the 150 MeV measurements of Measday are found to be in good agreement with experiment for protons scattered through 20° or less.
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Inelastic Scattering of Neutrons by Tritons

Physical Review, 1964
Assuming that the range of nuclear forces is small compared to the size of the triton and the wavelength of the incoming neutron ( zero-range'' approximation), a connection is derived between the cross sections for elastic and inelastic n-t scattering by calculating the ratio of the first Born approximation for inelastic to that for elastic scattering.
A.D. MacKellar, J.L. Gammel
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Inelastic Scattering of Neutrons [PDF]

Physical Review, 1954
L.E. Beghian, E.A. Eliot, D. Hicks, H. Halban   +3 more
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An Inelastic Neutron Scattering Experiment

American Journal of Physics, 1962
A recording spectrometer model 1820 manufactured by Nuclear Chicago with a NaI crystal scintillator, a neutron source, and an iron scatterer were used to measure the gamma ray at 0.84 MeV from Fe56 by inelastic scattering of fast neutrons.
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Inelastic scattering of neutrons by anharmonic crystals

Solid State Communications, 1963
Recent experiments have been able to observe the widths of the one-phonon resonances in the inelastic scattering of neutrons by crystals. The purpose of this paper is to provide a theoretical framework within which to determine the phonon frequencies and lifetimes from these experiments. When a crystal has anharmonicities interference effects can occur
Gordon Baym, Vinay Ambegaokar, John M. conway   +2 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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