The analytically continued S matrix for potentials defined as a sum of exponentials. II. The multichannel problem

Abstract

For pt.I see ibid., vol.16, p.2265 (1983). A method for computing the multichannel S matrix at real and complex energies is proposed. This method is a generalization of the one given previously for single-channel problems. It requires a potential matrix of the form Vn,n'(r)= Sigma j=1infinity Un,n'(j)( alpha )exp(- j alpha r). The algorithm to determine the Jost matrix (and hence the S matrix) is simple and fast. The feasibility and usefulness of the method is demonstrated by applying it to model problems on electronic and vibrational predissociation.