X-ray emission spectra induced by hydrogenic ions in charge transfer collisions

Theoretical models are constructed of the hard x-ray spectra resulting from electron capture by fully stripped Ne10+ ions traversing the gases Ne, He, H-2, CO2, and H2O. The measured spectra are superposiiions of individual lines of Ne9+. An exact description of the radiative cascade is used. Initial excited populations that reproduce the measured spectra are derived and quantitative predictions of the energies Bind intensities of lines in the soft x-ray and extreme ultraviolet regions are made. These lines when observed will be powerful diagnostic probes of the capture mechanism and of the diverse range of laboratory and astrophysical plasmas in which it occurs.