Determination of k-shell fluorescence parameters for medium-Z elements

K X-ray fluorescence parameters ( Kα1, Kα2,Kβ1', Kβ2', Kα and Kβ X-rays fluorescence cross sections and the average K shell fluorescence yields) for selected ten elements in the atomic range 42≤Z≤66 have been experimentally determined at photon excitation energy of 59.5 keV. K X-rays emitted from the samples have been counted by a Si(Li) detector. The Kα1, Kα2,Kβ1' and Kβ2' spectra for investigated elements have been derived from the measured K shell X-ray spectra by peak fitting process. Experimental results of K X-ray fluorescence parameters have been compared with theory. In general there is an agreement within the standard uncertainties of the experimental and theoretical values.