Rotational motions of CH molecules in weak orientational potentials of cubic symmetry
The Journal of Chemical Physics, ISSN: 0021-9606, Vol: 97, Issue: 2, Page: 1332-1342
1992
- 35Citations
- 7Captures
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Article Description
Nearly free rotational motions of CH molecules as substitutional impurities in argon, krypton, and xenon have been observed at low temperatures with inelastic neutron scattering. Besides energy transfer, the dependence of the scattered intensities on momentum transfer Q is used for the assignment of the experimentally observed lines to the various transitions of a spherical quantumrotor in an orientational potential of cubic symmetry. The measured intensities are in good agreement with theoretical predictions based on the extended James-Keenan model. Measurements with high energy resolution on solid CH in its antiferrorotational phase II were devoted to the determination of the Q dependence of the tunneling lines and the nearly free rotor lines. The results give the first direct experimental evidence for the value 3 for the ratio of the orientationally ordered molecules to those which are orientationally disordered in CH-II. © 1992 American Institute of Physics.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0000315381&origin=inward; http://dx.doi.org/10.1063/1.463260; https://pubs.aip.org/jcp/article/97/2/1332/827105/Rotational-motions-of-CH4-molecules-in-weak; http://aip.scitation.org/doi/10.1063/1.463260; https://aip.scitation.org/action/captchaChallenge?redirectUrl=https%3A%2F%2Faip.scitation.org%2Fdoi%2F10.1063%2F1.463260
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