The state specific predissociation of OH in its lowest excited state is investigated using time dependent propagation techniques. To improve the accuracy of potential energy curves, spin-orbit, spin-spin and rotational interactions required for the treatment, we have refined our CI techniques and used optimal orbitals for each one of the electronic states. The potential energy curves, the matrix elements, and the lifetimes of the rotational sublevels are compared to experimental and theoretical values using multichannel scattering theory.

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