Anisotropic two-body dissociation by highly charged ion impact

Abstract

The angular distribution of fragment emission with respect to the incoming beam direction is measured. In case of two body breakup of di-cationic molecular ions, such as D2O2+ and 2H2+2, a strong anisotropy is observed when one of the fragments is an H+ or D+. These molecular ions were produced by impact of slow highly charged ions on neutral species. The technique of recoil ion momentum spectroscopy was used to measure the complete momentum vectors of all fragments in coincidence.