CALCULATIONS OF PHOTODISSOCIATION AND PHOTOIONIZATION CROSS-SECTIONS BY USING A RECURSIVE EXPANSION OF GREENS OPERATOR WITH ABSORBING BOUNDARY-CONDITIONS

An iterative method for calculating total cross sections for molecular photodissociation and atomic photoionization is presented. It is base d on the recursive expansion of Green's operator with absorbing bounda ry conditions, recently developed by Mandelshtam and Taylor. The metho d is tested by calculating cross sections for photodissociation of the HCl+ molecule and another model problem, as well as for the photoioni zation of a hydrogen atom in the absence and presence of a strong magn etic field. In all applications the discrete variable representation i s employed.