Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
85 (1986), S. 2204-2210
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
The orientational disorder in a solid solution of methane and krypton (27% Kr) has been studied with inelastic neutron scattering. The spectra display a transition from diffusive high temperature rotations to rotational excitations of molecules with frozen-in orientational disorder at low temperatures. Of particular interest is a relatively sharp feature at an energy transfer of 0.78 meV which both broadens and shifts with increasing temperature. A simple model is based on a statistical distribution of local potentials due to the presence of Kr atoms and the state of excitation of the molecules. Finally, the isotope effect of the rotational excitations has been investigated.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.451114
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