State-selective one-electron capture by multiply charged ions, investigated with a modified multichannel Landau-Zener model

Abstract

The predictions of a multichannel Landau-Zener model, which includes Taulbjerg's fnl factor, for single-electron capture by multicharged ions, have been compared with different kinds of experimental results (electron, X, UV and energy gain spectroscopies). A reasonable agreement has been found for the populations of individual nl sublevels of capture when the electron-core interaction prevails over the l Stark mixing and when the rotational coupling can be ignored. This model has been tested with large core ions such as Ar8+ (2p6), Ar8+(2p53s 3P) and with ground state (C4+, N5+, O6+, Ne8+) and metastable 1s2s 3S (C4+, N5+) helium-like ions on various targets, below 0.5 au collision velocity.