Abstract
Al K-shell x-ray production cross sections induced by 50–250 keV protons and 1–3 MeV Ar11+ ions were measured. It was found that 3–4 L-shell electrons of the Al atom were multiply ionized by Ar11+ ion impact. The x-ray production cross sections were deduced from the experimental yield data and compared with binary encounter approximation (BEA), plane wave Born approximation and energy-loss Coulomb-repulsion perturbed-stationary-state relativistic (ECPSSR) theoretical predictions. For proton impact, the ECPSSR theory gave an accurate prediction of the experimental result. However, taking into account the multiple-ionization effect on fluorescence yield, the BEA model presented better agreement with the cross section data produced by Ar11+ ions.
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