L-shell X-ray production cross-sections for Mo by proton impact

Abstract

Total L and Li subshell X-ray production cross-sections were determined experimentally for Mo by proton impact.

Experimental determination of total M shell and subshell X-ray production cross sections for uranium by proton impact

“…This normalization factor was obtained following the same procedure as in a previous work. 10 In this work, for the determination of ζ we compare the K shell X-ray production cross section of Cu with that existing in bibliography, obtaining a value of 7730 ± 10.…”

“…As was specied in Pérez et al, 10 a tting curve dened as a quadratic polynomial in a log-log scale fashion was used. Namely,…”

“…For instance, with electron impact for: Ni 5 and Si 6 K shell cross sections; Ag L subshell cross sections; 7 and for multiple ionizations in K and L shells. 8 In the case of proton bombardment, the method was employed for: total L shell ionization cross sections of Sr and Mo; 9 Mo L subshells ionization cross sections; 10 K shell cross sections on elements with Z = 26–30 using low energy protons; 11 K, L and M shell production cross sections of Cu, Ag and Au, respectively; 12 and L and M shell cross sections of heavy elements, 13 among others. It was also used for determination of the Kα line cross section induced by heavy ion bombardment, 14 although in that work the authors used a different approach to the calculations than the rest of the cited articles.…”

“…for an electron transition X j → M i , where ζ is a normalization factor, 10 N A is the Avogadro’s constant, A is the atomic weight of the analyzed element, ε ( E M i X j ) is the intrinsic efficiency of the X-ray detector at the energy E M i X j of the characteristic line, S / ρ and μ / ρ are, respectively, the mass stopping power and mass attenuation coefficient of the material, whose mass density is ρ , α and β are the beam incidence angle and X-ray takeoff angle, respectively, both measured from the normal to the sample surface, and Y M i X j ( E 0 ) is the number of detected M i X j characteristic photons per incident proton, hereafter abbreviated to ‘X-ray yield’.…”

M-subshell X-ray production cross sections of Re and Os by electron impact

“…The formalism used by An et al is, however, particularly suitable for protons. 8 In a recent study, s X values for M 3 , M 4 and M 5 subshells of Pt and Au by electron incidence were experimentally determined through a different method based on ionization depth distribution functions, also using thick targets. 9 In the present work, this new approach has been used to determine X-ray production cross sections for the ve M subshells of Re and Os, which have been experimentally obtained for the rst time.…”