On spin-rotation contribution to nuclear spin conversion in C_{3v}-symmetry molecules. Application to CH_3F

Details On spin-rotation contribution to nuclear spin conversion in C_{3v}-symmetry molecules. Application to CH_3F On spin-rotation contribution to nuclear spin conversion in C_{3v}-symmetry molecules. Application to CH_3F

1999-05-06

arxiv.org/abs/physics/9905015v2

J. Phys. B: At. Mol. Opt. Phys., 32(12): 2963--2972 (1999)

Physics

Chemical Physics

13 pages with single-spacing, REVTeX, no figures, accepted for publication in <J. Phys. B>

Scientific paper

10.1088/0953-4075/32/12/314

The symmetrized contribution of E-type spin-rotation interaction to conversion between spin modifications of E- and A_1-types in molecules with C_{3v}-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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