Abstract
A systematic study of the relative x-ray intensity ratios of the K- and L-series 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 measurements were done using an energy-dispersive Si(Li) detector with photon excitation by radioisotopes. It was shown that reliable x-ray intensity ratios can be derived by employing well-defined experimental conditions. For Fe a significant dependence of the Kα and Kβ x-ray yields per incident photon on the oxidation state of Fe was observed but no discernible effect on the Fe Kβ/Kα intensity ratio was observed. Likewise, no significant 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 ratios Lβ2/Lα, Lβ1/Lα, Lη/Lα and Lβ6/Lα were also measured and reported. The measured intensity ratios agree fairly well with the theoretical values of Scofield. Copyright © 2000 John Wiley & Sons, Ltd.
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