K-shell x-ray production by H and He ions at low projectile velocities in solid versus gas targets

Throughout all these workshops and again at this conference, the effective charge has been utilized to analyze stopping power data. How does Z1/sup *//Z1 apply in explanation of quantities relevant to our understanding of penetration of charged particles through matter, but other than stopping powers? The quantity that I would like to consider is the inner-shell ionization cross section. I will restrict myself to K-shell x-ray production cross sections by H and He ions because these comprise the data base that I have. This data base was gathered from the literature for another project and it consists of circa 6600 cross sections. 5 figs