THE SOLUTION OF THE TIME-DEPENDENT SCHRODINGER-EQUATION BY THE (T,T')METHOD - MULTIPHOTON IONIZATION DISSOCIATION PROBABILITIES IN DIFFERENT GAUGES OF THE ELECTROMAGNETIC POTENTIALS/

A new approach is introduced for the calculation of multiphoton partia l decay rates; in ionizing and dissociative processes. The partial dec ay rates (partial resonance widths) are calculated by carrying out asy mptotic analysis of a complex scaled resonance quasienergy solution of the time-dependent Schrodinger equation obtained when the acceleratio n, momentum, reduced momentum, or length gauges are used. The partial width analysis is made only after applying the proper complex-scaled t ransformations on the resonance solution. The recently developed (t,t' ) algorithm [J. Chem. Phys. 99, 4590 (1990)] significantly reduces the computational effort when the Hamiltonian is represented in the momen tum gauge or in the length gauge. The new approach is applied to a mod el Hamiltonian which describes the multiphoton detachment of Cl- in th e A(r)F laser field.