3Σu?-3Σu+ coupling in the O2B3Σu? predissociation |
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Authors: | Paul S Julienne |
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Institution: | Physical Chemistry Division, National Bureau of Standards, Washington, D.C. 20234 USA |
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Abstract: | The role of spin-orbit mixing in the O2 Schumann-Runge predissociation is investigated. The state is found to cross the state near 2.0 Å with an interaction matrix element of approximately 55 cm?1. This state contributes to the widths of the Bv ≥ 6 levels, but introduces only small level shift perturbations. When the partial widths due to the interaction are added to the previously calculated widths due to the 5Πu, 3Πu, and 1Πu states, reasonable agreement is obtained with experimental measurements on O16O16 and O18O18. The possibility of non-Lorentzian line profiles and the dependence of the width on rotational quantum number is investigated. The approximation of the spin-orbit matrix element by its value at the crossing point is shown to be a good approximation for calculating the second difference perturbations. |
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