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On spin-rotation contribution to nuclear spin conversion in C3v-symmetry molecules. Application to CH3F

K. I. Gus'kov

physics.chem-pharXiv:physics/9905015

Abstract

The symmetrized contribution of E-type spin-rotation interaction to conversion between spin modifications of E- and A1-types in molecules with C3v-symmetry is considered. Using the high-J descending of collisional broadening for accidental rotational resonances between these spin modifications, it was possible to co-ordinate the theoretical description of the conversion with (updated) experimental data for two carbon-substituted isotopes of fluoromethane. As a result, both E-type spin-rotation constants are obtained. They are roughly one and a half times more than the corresponding constants for (deutero)methane.

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