Abstract In this work, we present a comprehensive theoretical investigation of charge exchange (or electron capture) processes in collisions of fully stripped N7 + ions with He(1s2) atoms over a broad energy range of 0.1–225 keV/u. Using a two-active-electron semiclassical asymptotic-state close-coupling approach, we compute total and partial cross sections for single-electron capture (SEC) and double-electron capture (DEC), our results show good agreement with available experimental and theoretical data, and where discrepancies arise, possible underlying reasons are discussed in detail. In SEC processes, it is shown that 3ℓ- and 4ℓ-selective cross sections follow a statistical ℓ-distribution at high energies, favoring capture into high-angular-momentum subshells. In contrast, the 5ℓ-selective cross sections exhibit oscillatory behavior, reflecting strong interchannel competition. For DEC processes, asymmetric N5 +(2ℓnℓ′) and symmetric N5 +(3ℓ3ℓ′) configurations are preferentially populated. Furthermore, we provide a complete and consistent set of cross sections, particularly for state-selective processes, where available data are scarce. These results will be valuable for astrophysical and plasma radiation modeling.
Niu et al. (Mon,) studied this question.