M X-ray fluorescence cross sections and yields in the atomic region 78 ≤ Z ≤ 82 excited by 6.47 and 7.57 keV photons

Experimental M X-ray fluorescence cross sections for the elements Pt, Au and Pb have been measured at incident energies 6.47 and 7.57 keV. Theoretical M X-ray fluorescence cross sections for the elements Yb, W, Hg, Tl, Bi and Ra at 6.47 and 7.57 keV are also calculated. Experimental results are compared with the theoretical values based on relativistic Dirac-Hartree-Slater calculations of Chen et al. and non-relativistic calculations of McGuire. The average M shell fluorescence yields ω-barM have ben deduced using experimental cross section values and the theoretical M shell photoionization cross sections. Results are compared with the available theoretical values. (author)