Collision-induced dissociation and dissociative capture of H2+ in Ar and Kr

Measurements of the absolute total and differential cross sections for the production of protons and hydrogen atoms in the energy range of 1-5 keV for reactions of H2+ molecular ions in Ar and Kr targets are reported. The results show that the cross section for the dissociative capture (DC) proccess is about one order of magnitude higher than that for the collision-induced dissociation. The angular distribution of the fragments in both targets and for all acceleration energies shows a monotonic decrease in the differential cross section with increasing angle. A sharp increase in the angular distribution at scattering angles <1.6 deg. is observed for hydrogen atoms resulting from DC and in particular for the Kr target