Calculated vibrational transition probabilities of OH( X2Π)
Abstract
The theoretically derived dipole moment function of OH( X2Π) obtained by Stevens Das, Wahl, Neumann, and Krauss is used to calculate the absolute intensities of the vibrational-rotational transitions of the OH Meinel bands. The calculations take full account of the spin uncoupling and vibration-rotation coupling which markedly influence the radiative transition probabilities. The effect of lambda-doubling on the vibrational transitions is analyzed and generally found to be negligible. Results are tabulated for ∆ v = v' - v″ ranging from the fundamental transitions ∆ v = 1 to the ∆ v = 5 overtone, for v' = 1-9 and J' = 0.5 - 15.5. A comparison is made with available data, and various features of the OH spectrum are examined that are of aeronomical and experimental interest. Thermally averaged emission rates are presented for ∆ v = 1-5, and the validity of the rotational temperatures commonly derived from experimental intensity distributions is questioned.
- Publication:
-
Journal of Molecular Spectroscopy
- Pub Date:
- November 1974
- DOI:
- 10.1016/0022-2852(74)90125-8
- Bibcode:
- 1974JMoSp..53..150M