Strong sensitivity of x-ray emission lines following charge exchange between highly charged ions and H(1s) in weakly screened media

Abstract

We use the classical trajectory Monte Carlo method to analyze charge exchange processes between fully stripped projectiles with H(1s) in a screened environment at impact energies in the range 18 eV/amu to 10 keV/amu. For Fe26+ projectiles, (n,l)-state selective charge exchange and line emission cross sections are presented for Debye screening lengths from 15 a.u. up to the unscreened case limit. At low-impact energies, a strong dependence of the hardness ratio on the Debye screening length is found. We show that such strong dependence also evidences itself for Ne10+,P15+,Ar18+, and Kr36+ projectiles. Clear indications of this dependence are noticeable in the photonic spectra even for large screening lengths (∼100 a.u.).