Chemical effects in x-ray fluorescence by study of Fe, Pt and U compounds

A systematic study of the relative x-ray intensity ratios of the K- and L-s eries lines was made on compounds of Fe, Pt and U to examine the influence of chemical state on energy-dispersive x-ray fluorescence analysis. The mea surements were done using an energy-dispersive Si(Li) detector with photon excitation by radioisotopes, It was shown that reliable x-ray intensity rat ios can be derived by employing well-defined experimental conditions. For F e a significant dependence of the K alpha and K beta x-ray yields per incid ent photon on the oxidation state of Fe was observed but no discernible eff ect on the Fe K beta/K alpha intensity ratio was observed. Likewise, no sig nificant effect of chemical state on the various L-series intensity ratios of Pt and U was observed. For the L-series the seldom quoted intensity rati os L beta(2)/L alpha, L beta(1)/L alpha, L eta/L alpha and L beta(6)/L alph a were also measured and reported. The measured intensity ratios agree fair ly well with the theoretical values of Scofield, Copyright (C) 2000 John Wi ley & Sons, Ltd.