MOLECULAR H-2(-2(+) IONS IN A STRONG LASER FIELD - A 2-PARTICLE ONE-DIMENSIONAL MODEL() AND D)

We present the results of numerical simulations that describe the dyna mics of molecular H-2(+) and D-2(+) ions in a strong laser field in th e frequency range of 0.25-3.0 eV. Using the method of straightforward numerical integration of the time-dependent Schrodinger equation, we o btain the total wave function of the system that describes the electro n and nuclear degrees of freedom beyond the framework of the Born-Oppe nheimer approximation. We apply the derived wave function to study the competition of ionization, dissociation, and excitation of a molecula r system for various intensities and frequencies of laser radiation. I n the case of low frequencies, H-2(+) and D-2(+) ions display differen t behavior in the field of an electromagnetic wave. In the case of tun neling ionization regime, we discuss physical factors that result in t he nonmonotonic dependence of the ionization rate on the internuclear distance.