MOLECULAR PHOTODISSOCIATION WITH DIVERGING COUPLINGS - AN APPLICATIONTO H-2-PHOTON PROBLEM( IN INTENSE CW LASER FIELDS .1. THE SINGLE)

The photodissociation of homonuclear ions exposed to continuous-wave ( cw) lasers gives rise to asymptotically diverging couplings when appro ached in the electric-field gauge. Quantization of the laser-induced r esonances becomes possible by complex rotation, leading to accurate en ergies, widths, and wave functions. A pseudoflux is endowed in the clo sed-channel component when calculated in the diabatic frame and for hi gh laser intensities. A complex energy flux analysis performed in the adiabatic representation is developed, replacing the standard Siegert analysis which is no longer adequate for the extraction of the width f rom the asymptotic amplitude of the open-channel function. At the limi t of strong radiative couplings the remaining nonadiabatic couplings a symptotically vanish. In the special case of constant potential coupli ngs, the width is given by the asymptotic amplitude of the open-channe l function through a modified Siegert analysis. Application is made to H-2+, in laser frequency and intensity regimes where a single-photon description is sufficient.