NONRELATIVISTIC STRONG-FIELD PHOTOIONIZATION WITHOUT MAKING THE DIPOLE APPROXIMATION

Within the context of the time-reversed S-matrix approach to photoioni zation, and employing a recently proposed strong-field solution to the Schrodinger equation, analytic expressions for the atomic photoioniza tion rates are obtained here without using the dipole approximation. W e show that the absorbed photon,momentum shows rip as a forward-direct ed momentum component for the photoelectron. All the expressions repor ted in this work have the correct limits when the dipole approximation is used.