Electron capture collisions of Kr2+(3P) in H2

Single-electron-capture cross sections for Kr 2+ -H 2 collisions in the 1-6 keV energy range are determined using the initial growth curve technique. Energy defect measurements reveal that the incident Kr 2+ beam is purely in the ground electronic state and that the product Kr + ions are predominantly in the 2 P and 2 S states. Charge transfer occurs via avoided crossings of pseudo-molecular potential energy surfaces as well as by non-crossing, Demkov-type mechanisms (1964).