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Title: Collective high frequency motions in liquid deuterium fluoride.
Authors: Demmel, F
Heusel, G
Waldner, I
Stride, JA
Bertagnolli, H
Keywords: Frequency modulation
Neutron spectroscopy
Issue Date: Oct-2008
Publisher: Oldenbourg Verlag
Citation: Demmel, F., Heusel, G., Waldner, I., Stride, J., & Bertagnolli, H. (2008). Collective high frequency motions in liquid deuterium fluoride. Zeitschrift Fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics, 222(10), 1551-1558. doi:10.1524/zpch.2008.5414
Abstract: The collective motions in liquid deuterium fluoride (DF) have been investigated by neutron scattering motivated by a MD simulation, which predicted an optic-type mode at small momentum transfers. Spectra of the measured longitudinal current correlation function show two modes. The lower frequency one originates from acoustic-type movements. The intensity of the higher frequency excitation can be attributed to an out of phase motion of neighboring DF molecules, an optic-type mode. Both, the frequencies and the intensity distribution in momentum space agree well with the MD simulation. The widths of the experimental spectra exceed the widths from the MD simulation and indicate missing relaxation processes in the simulation. © 2008, Oldenbourg Verlag
Gov't Doc #: 1466
ISSN: 0942-9352
Appears in Collections:Journal Articles

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