L-shell X-ray production cross sections and alignment by proton impact

Abstract

The cross sections of X-ray production from L-subshells of palladium atom by proton impact have been determined by measuring the intensity of the L X-ray lines. We obtained the alignment parameter by measuring the degree of the polarization of the L 1-line excited by 0.2–0.5 MeV protons. The experimental cross sections agree well with the theoretical predictions of the ECPSSR model. The experimental alignment parameter differs markedly from that calculated in terms of the Hartree-Slater model, making allowance for the Coster-Kronig (CK) transitions in case used the values of the ionization cross section from the theory and the CK transition rates from Krause's compilation. In our experiment semiempirical value of the corrections to the L-subshell CK transitions for Pd has been derived from the results of measuring L-line intensities. The semiempirical correction factor improves the agreement of the theory with experimental data.