L X-ray fluorescence cross sections and yields for medium Z elements in the energy region 5.47≤E≤9.36 keV.

Total L X-ray fluorescence cross sections have been measured in the atomic region 39≤Z≤51 excited by 5.47, 6.47, 7.04, 7.57, 8.14, 8.74 and 9.36 keV photons. Experimental cross sections are compared with the theoretical estimates of Chen et al. based on relativistic Dirac-Hartree–Slater theory. Good agreement is observed between experimental results and theoretical estimates in the studied atomic and energy region. Experimental fluorescence yields have been evaluated using the experimental fluorescence cross sections and theoretical subshell photoionization cross sections. Fluorescence yields are fitted by least squares to fifth-order polynomials in Z of the form ∑[sub T10n] a[sub n] z[sup n] and compared with theoretical and earlier fitted values. The deviation of the average fluorescence yield in the atomic region 46≤Z≤51 with new theoretical estimates of ū[sub L] , calculated using the ECPSSR (Energy loss Coulomb deflection Perturbed Stationary State Relativistic effects) theory of Brandt and Lapicki and the fitted values clearly indicate the weak dependence of the average fluorescence yield on the initial vacancy distribution. [ABSTRACT FROM AUTHOR]