Em. Oualim et al., ELECTRON-IMPACT IONIZATION OF KRYPTON IONS (Q=8-13), Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 98(1-4), 1995, pp. 150-153
Absolute cross sections for electron impact single ionization of Kr10 and Kr11+ ions and double ionization of Kr-q+ (q = 8-13) have been me
asured in an animated crossed-electron ion beam experiment. Ionization
thresholds corresponding to particular electron pairs and inner-shell
electron ejection are estimated from a structure Hartree-Fock calcula
tion. For double ionization, results show that, along the homonuclear
sequence, direct double ionization is progressively overcome due to th
e increasing relative importance of direct L-shell ionization followed
by autoionization. The presence of ions in metastable states is obser
ved for Kr8+ and Kr9+ contributing to direct and indirect processes.