L- shell X-ray production cross sections for Au and Bi induced by 30 MeV to 75 MeV boron ions

Abstract

In the present work, the experimental cross sections for production of the L X-rays in Au and Bi by impact of 30 MeV to 75 MeV B ions have been presented. The B ion energies were varied in small steps in order to examine the energy dependence of the cross sections and the influence of multiple ionization on these cross sections. The experimental cross sections have been compared with the calculated ones obtained using the boron ion-induced L_p (p = 1–3) sub-shell ionization cross sections based on the PWBA and the ECPSSR models, X-ray emission rates based on the Dirac-Fock model, fluorescence and Coster-Kronig yields based on the Dirac-Hartree-Slater model. The significant differences observed between the measured and calculated values can be ascribed to multiple ionization effects caused by the incident boron ions in the target elements.