MICROWAVE IONIZATION OF 3-DIMENSIONAL HYDROGEN-ATOMS IN A REALISTIC NUMERICAL EXPERIMENT

We develop a theoretical formalism that provides a powerful tool for t he detailed numerical analysis of the interaction of three-dimensional (as well as one-dimensional model) hydrogen atoms with an intense rad iation field. A combination of Floquet theory and complex dilation, to gether with a representation of the atomic degrees of freedom in a Stu rmian basis, allows us to treat this problem in its entire complexity. The application of this approach to the microwave ionization of Rydbe rg states of hydrogen provides the most advanced numerical experiments in this area to date, to our knowledge, with maximum control of the i ndividual physical parameters involved. Special emphasis is given to a discussion of the effect of some of these parameters on the numerical results.