Abstract
Using moderately high resolution, inelastic neutron scattering we have investigated the vibrational spectroscopy and dynamics of benzene molecules in solid benzene and in solid C 6H 6:C 6F 6. From our measurements of phonon-molecule vibration coupling we show that it is possible to explain the magnitude of the observed frequency shifts of the phonon side-bands in terms of vibrational amplitudes and the electrical properties of the molecules. We observe anomalous levels of scattering from the hexafluorobenzene molecules which we also rationalise in terms of intermolecular coupling.
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