Mg K-shell x-ray emission induced by various ions

Mg K-shell x-ray production cross sections have been investigated for the impact of H⁺, He²⁺ and highly charged heavy ions Xe²⁰⁺ and Eu²⁰⁺ in the energy range near the Bohr velocity. The x-ray production cross sections were extracted from the yield and compared with various theoretical calculations. It is found that, with the same incident energy per nucleon, the cross section induced by light ions is lower than that produced by highly charged heavy ions by a factor of about 10⁴. With the impact of H⁺ and He²⁺ ions, the x-ray emission cross section can be well predicted by ECPSSR theory. However, for the bombardment of highly charged heavy ions, the BEA calculation, corrected both by Coulomb repulsion and effective nuclear charge, results in a good estimation to the experimental data.