The dependence of Rcof cross sections for one-electron capture by S11+, S13+and Krq+(q=7-25) ions from He atoms

Abstract

Total cross section measurements and translational energy spectroscopy have been performed at collision energies of 1q keV for one-electron capture processes by S11+, S13+ and Krq+ (7<or=q<or=25) ions from He atoms. When the measured cross sections are plotted as a function of the crossing radius Rc deduced from the observed energy gain, it is found that the cross sections in general increase with Rc and almost all of them lie between the 1/2 pi Rc2 and pi Rc2 curves. This dependence on Rc is very different from previous results for ions with relatively low q(q<10).