| Numéro |
J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981
International Conference on Phonon Physics
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|---|---|---|
| Page(s) | C6-395 - C6-397 | |
| DOI | https://doi.org/10.1051/jphyscol:19816115 | |
International Conference on Phonon Physics
J. Phys. Colloques 42 (1981) C6-395-C6-397
DOI: 10.1051/jphyscol:19816115
Institut für Festkörperforschung der Kernforschungsanlage Jülich, Postfach 1913, D-5170 Jülich, F.R.G.
J. Phys. Colloques 42 (1981) C6-395-C6-397
DOI: 10.1051/jphyscol:19816115
COHERENT NEUTRON SCATTERING FROM POLYCRYSTALS
U. Buchenau, H.R. Schober et R. WagnerInstitut für Festkörperforschung der Kernforschungsanlage Jülich, Postfach 1913, D-5170 Jülich, F.R.G.
Abstract
Phonon dispersion curves are mostly determined by coherent neutron scattering from single crystals. For a number of materials, however, large enough single crystals are not obtainable. We used the detailed structure of the coherent scattering from polycrystals to obtain as much information on the phonons as possible. Time-of-flight spectra of Al and Ca over a large area in Q and ω have been analyzed in terms of lattice dynamical models. It turns out that, at least for these simple materials, a rough picture of the phonon dispersion may be obtained.