Landau-Zener Model Calculations of One-Electron Capture from He Atoms by Highly Stripped Ions at Low Energies

Abstract

Cross sections for single electron capture from He atom by highly stripped, C^q+, N^q+, O^q+, F^q+, Ne^q+ (q=4–9) and Kr^q+ (q=10–25) ions have been calculated using the multichannel Landau-Zener model. The collision energy is 600 eV/amu except for Kr^q+, whose energy is q×1 keV. The selective electron capture into a single or at most two n-shells is predicted for the cases of q≤9. The n-distributions obtained by the present calculation are quite consistent with our earlier observation and the total cross sections agree reasonably well with the measured data in spite of the simple model. In the case of Kr^q+, where q is larger than 10, more and more shells can be populated and the total cross sections increase monotonically with the increase of q.