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

✍ Scribed by K. J. S. Sawhney; G. S. Lodha; S. K. Kataria; S. K. Kulshreshtha

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 95 KB
Volume: 29
Category: Article
ISSN: 0049-8246
DOI: 10.1002/(sici)1097-4539(200003/04)29:2<173::aid-xrs412>3.0.co;2-q

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✦ Synopsis

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 Ka and Kb x-ray yields per incident photon on the oxidation state of Fe was observed but no discernible effect on the Fe Kb/Ka 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 Lb 2 /La, Lb 1 /La, Lh/La and Lb 6 /La were also measured and reported. The measured intensity ratios agree fairly well with the theoretical values of Scofield.

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