Effect of rotational coupling on emission probabilities of Lyman and Werner band systems of the vacuum ultraviolet spectrum of H2

Details Effect of rotational coupling on emission probabilities of Lyman and Werner band systems of the vacuum ultraviolet spectrum of H2 Effect of rotational coupling on emission probabilities of Lyman and Werner band systems of the vacuum ultraviolet spectrum of H2

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jchph..87.2036a&link_type=abstract

Journal of Chemical Physics (ISSN 0021-9606), vol. 87, Aug. 15, 1987, p. 2036-2044.

Physics

Chemical Physics

31

Hydrogen, Molecular Rotation, Molecular Spectra, Planetary Radiation, Ultraviolet Spectra, Coupling, Eigenvalues, Far Ultraviolet Radiation, Tables (Data), Transition Probabilities

Scientific paper

The quantitative interpretation of the electroglow emission from the sunlit hemisphere of outer planets and H2 absorption lines observed in the Lyman and Werner band systems in diffuse interstellar clouds requires detailed knowledge of the absolute values of transition probabilities between many rovibronic levels. In this paper, line emission transition probabilities in the Lyman and Werner band systems of H2 are calculated. The treatment takes into account the rotational coupling between B 1Sigma(u)+ and C 1Pi(u) calculated by Ford (1974). A direct method more accurate for high v-prime and J-prime levels is also used, and significant differences are found. It is demonstrated that experimental results are well reproduced by the calculations, so long as no self-absorption occurs. It is also shown that some lines are relabeled when the percentage of B and C characters of the rovibronic levels are taken into account.

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