Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Predissociation of the $A^2∑^+$ (v'=4) States of OH:Effects of Multichannel Asymptotic Interactions

  • Published : 20000500
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Abstract

Quantum mechanical analysis is presented for the photodissociation dynamics of the v'=4 levels of the $A^2Σ^+$ state of the OH molecule. We focus on the effects of the multichannel interactions between the asymptotically degenerate states in the recoupling region to see how they affect the dynamics near the predissociating resonances. Both the scalar (total cross section and branching ratios) and the vector properties (angular distributions and alignment parameters) of O($^3P_j, j=0, 1, 2) are treated. The resonances are predicted to be highly Lorentzian, and the branching ratios do not change much across them. Vector properties, however, show very delicate effects of the multichannel interactions and overlapping near the isolated and overlapping resonances. Computed resonance lifetimes agree reasonably well with experimental results.

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