Theory of nuclear spin conversion in ethylene

Details Theory of nuclear spin conversion in ethylene Theory of nuclear spin conversion in ethylene

2000-08-16

arxiv.org/abs/physics/0008083v1

Phys. Rev. A v.63, 062505-(1-9) (2001)

Physics

Chemical Physics

20 pages, 5 eps figures

Scientific paper

10.1103/PhysRevA.63.062505

First theoretical analysis of the nuclear spin conversion in ethylene molecules (13^CCH4) has been performed. The conversion rate was found equal approx. 3x10^{-4} 1/s*Torr, which is in qualitative agreement with the recently obtained experimental value. It was shown that the ortho-para mixing in 13^CCH4 is dominated by the spin-rotation coupling. Mixing of only two pairs of ortho-para levels were found to contribute significantly to the spin conversion.

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