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The internal conversion electrons from M and N shells of the 14.4 keV transition of 57Fe diffused into Cr, Ni, Cu, Pt and Au substrates were measured using a high-resolution β-ray spectrometer. From relative intensities of conversion electrons analyzed using a deconvolution method, we deduced the contact charge density of 4s electrons ρ4s(0) of 57Fe impurity atom in these host metals. The 4s contact charge density of 57Fe embedded in these host metals, as well as Fe and Co metals, is found to be nearly equal. This fact indicates that the 3s contact charge density ρ3s(0) plays an important role in the variation of the isomer shift of 57Fe in these alloys

THE CONTACT CHARGE DENSITIES OF 4s ELECTRONS OF Fe IMPURITY ATOM IN SOME TRANSITION AND NOBLE METALS