Validation of photodissociation models using Raman excitation Profiles: an application to IBr

The validity of different sets of model potential energy curves and functional forms for nonadiabatic and optical coupling between them used to treat IBr photodissociation is ascertained by calculation of Raman excitation profiles using the time dependent wave packet method. Our results suggest that the additional three states in the six state model play only a marginal role in the photodynamics of IBr.