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Phonon Widths in RbBr at 80, 290, and 370 K from Neutron Measurements
Author(s) -
Nilsson G. G.
Publication year - 1981
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221060130
Subject(s) - phonon , inelastic neutron scattering , neutron , yield (engineering) , neutron scattering , materials science , infrared , condensed matter physics , atomic physics , optics , physics , nuclear physics , metallurgy
Neutron inelastic scattering experiments are performed on RbBr at 80, 290, and 370 K and the experimental phonon widths are determined. Very little broadening with temperature is observed except for certain longitudinal optical modes which are broad at all temperatures and also show a marked temperature dependence in the width. A comparison is made with infrared data where measurements on the fundamental absorption peak yield information about the phonon width.