Electron capture by fast projectiles from lithium, carbon, nitrogen, oxygen and neon

• Published in: Physica scripta Vol. 95; no. 6; pp. 65403 - 65414
• Main Authors: Mancev, I, Milojevic, N, Delibasis, D, Belkic, D
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.06.2020
• Subjects: charge exchange; electron capture; fast ion atom collision; Medicin och hälsovetenskap
• ISSN: 0031-8949; 1402-4896
• DOI: 10.1088/1402-4896/ab725e

The three-body boundary-corrected continuum intermediate state method is used to compute total cross sections for single charge exchange in ion-atom collisions at intermediate and high impact energies. Detailed illustrations are given for several scattering systems: H+ + Li, He2+ + Li, H+ + C, He2+ + C, H+ + N, H+ + O and H+ + Ne, He2+ + Ne. An independent particle model and the frozen-core approximation are employed with only one target electron taken as being active. The initial ground state of the active electron in a multi-electron target is described by five wave functions. These are two Roothaan-Hartree-Fock (RHF) wave functions, the single- as well as double-zeta functions and the hydrogen-like functions. Comparisons among the resulting cross sections are made to check their sensitivity to the choice of the initial target wave functions. In the case of a lithium target, the separate cross sections for electron capture from the K-shell and L-shell are reported. The present theoretical total cross sections are compared with the available experimental data and overall good agreement is found, especially when using the RHF wave functions for multi-electron targets.