Electron capture by protons in collision with some alkali-like ions using a model potential approach

Abstract

The process of H formation as a result of electron capture by protons from some alkali-like ions is investigated using the Coulomb-Born approximation with the full interaction potential. These ions are visualised as one-electron species to reduce the complexity of dealing with many-electron ions. In order to take the effect of the core electrons into account, the lone valence electron is assumed to move in the field of a model potential. Results for ground-state capture cross sections from Mg+, Ca+, Sr+ and Ba+ target ions are presented for several incident proton energies in the range 10-1000 keV retaining both the post and the prior forms of the interaction potential. The results for capture cross sections in the ground state in H++Mg+ ion collisions are compared with the available experimental findings.