Abstract
Abstract By using the weighted and unweighted mean values of the experimental average M-shell fluorescence yield reported in the literature covering the period from 1955 to 2005 and the theoretical values based on the non-relativistic Hartree–Fock–Slater (HFS) calculations of McGuire (1972) , we produce good estimations for the semi-empirical values of elements in the range of 70≤ Z ≤90. These values are obtained by the interpolation of the normalized weighted and unweighted mean values to their corresponding theoretical ones. The results have been compared to other theoretical, empirical and experimental data reported in the literature. Reasonable agreement has been obtained between our result and other works.
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