The state-specific decomposition OH(A 2Σ+,v,N,F1/F2)→O(3PJ)+H(2S) is investigated using multichannel scattering theory based on potential energy curves, spin–orbit couplings, and Coriolis couplings, obtained from multireference configuration interaction wave functions. The fine-structure branching fractions of the O(3PJ) fragment are determined and compared with the results of frequently used approximate models. The predissociation rates of the individual OH(A 2Σ+,v,N,F1/F2) levels are also computed and compared with the results of recent experiments.

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