SINGLE-ELECTRON CAPTURE FROM MOLECULAR-HYDROGEN TARGETS BY IMPACT OF PROTONS AND ALPHA-PARTICLES

The present work deals with single electron capture processes from H-2 targets by impact of heavy bare ions at intermediate and high collisi on energies. Within the distorted wave formalism, the one active elect ron model developed to describe collisions with multielectronic atomic targets is used for the case of H-2 targets. Three different distorte d wave models are employed: the continuum distorted wave, the continuu m distorted wave-eikonal initial state, and the continuum distorted wa ve-eikonal final state. Using these distorted wave approximations, tot al cross sections for H+ and He2+ impact are calculated employing two different representations of the initial bound molecular wave function . The variation of the total cross sections due to this change in the description of the initial wave function and due to changes of the dis tortion factors in the entrance and exit channels is studied. The theo retical results are compared with available experimental data.