MULTIPHOTON IONIZATION OF H-2(- A COMPARISON OF FLOQUET AND WAVE-PACKET RESULTS() BY INTENSE LIGHT )

Multiphoton ionization rates from the dressed 1s sigma(g)(+) and 2p si gma(u)(+) states of H-2(+) are calculated within the Floquet approach. For linearly polarized light, and parallel transitions, we determine ionization rates for a range of internuclear separations. A rich struc ture of multiphoton resonances has been found. These features are not reproduced by quasistatic field models. The values of ionization rates as well as their bond-length dependence are studied and compared with wave-packet calculations. Differences between results and reasons for discrepancies are discussed. Finally, we present plots of dressed-sta te wave-function densities in order to illustrate laser-induced orbita l hybridization.