September 2011

Journal

Ionization Processes in Small Quasimolecules: He2+ – He

By:
Ogurtsov, G.; Ovchinnikov, S.; Macek, J.; Mikoushkin, V.
Journal Name:
Physical Review A
Page Number:
032706-1-032706-6
Volume:
84
Issue Number:
3
Publication Date:
September 2011
View DOI Listing:
https://doi.org/10.1103/PhysRevA.84.032706

Abstract

The energy spectra of electrons ejected in He2+−He collisions were measured in the ion energy range 6–30 keV. Theoretical analysis of the ionization mechanisms has been performed on the basis of the advanced adiabatic approximation for one-electron processes and perturbation theory for two-electron processes. The ionization channel 2pσ2 → 1sσndσ → 1sσεdσ has been revealed, which makes a considerable contribution to the ionization cross section in the keV ion energy range.