Collision-induced dissociation and dissociative capture ofH2+inArandKr

Abstract

Measurements of the absolute total and differential cross sections for the production of protons and hydrogen atoms in the energy range of $1--5\phantom{\rule{0.3em}{0ex}}\text{keV}$ for reactions of $\mathrm{H}{}_{2}{}^{+}$ molecular ions in $\text{Ar}$ and $\text{Kr}$ 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 $<1.6\ifmmode^\circ\else\textdegree\fi{}$ is observed for hydrogen atoms resulting from DC and in particular for the $\text{Kr}$ target.