Use of a recursive expansion of the Green operator with absorbing boundaryconditions to study the effect of non-adiabatic coupling on photodissociation cross sections: application to the CO molecule

The recently proposed iterative method (Grozdanov T P and McCarroll R 1996 J. Phys. B: At. Moi. Opt. Phys. 29 3373) for calculating the total photodis sociation cross sections, based on a recursive expansion of the Green opera tor with absorbing boundary conditions, is applied to the case where the fi nal electronic states are coupled leading to predissociation. The process c onsidered is the transition of the CO molecule from the ground X-1 Sigma(+) state into Rydberg-valence predissociating B (1)Sigma(+)-D-/ (l) Sigma(+) states. Agreement with close coupling calculations is found.