Ortho-para transition in molecular hydrogen

Details Ortho-para transition in molecular hydrogen Ortho-para transition in molecular hydrogen

2008-01-03

arxiv.org/abs/0801.0561v1

Physics

Chemical Physics

4 pages, submitted to Phys. Rev. A

Scientific paper

10.1103/PhysRevA.77.030501

The radiative ortho-para transition in the molecular hydrogen is studied. This highly forbidden transition is very sensitive to relativistic and subtle nonadiabatic effects. Our result for the transition rate in the ground vibrational level $\Gamma(J=1\to J=0) = 6.20(62)\cdot 10^{-14} \iyr$ is significantly lower in comparison to all the previous approximate calculations. Experimental detection of such a weak line by observation of, for example, the cold interstellar molecular hydrogen is at present unlikely.

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