A simple description of vibrational predissociation by a full-collision approach

A simple theoretical model is described for vibrational predissociation. The model, which is based on a full-collision approach, predicts the dependence of the rates on the initial quantum number and focuses on the importance of the repulsive force along the van der Waals coordinate. Picosecond state-to-state rates are measured for I_2He (and I_2Ne) in different quantum numbers of the I_2 and I_2He coordinates, and the results are compared with the results of the model.