X-ray fluorescence analysis was carried out with H3/Zr and Pm147/Al as primary x-ray sources. For spectro-analysis, pulse analysis with proportional counter and electronic pulse height analyser or x-ray filter is applied. In the He flow small specimen chamber, light elements as Na, Mg, Al and Si were detected. Al2O3 and SiO2 mixtures were analysed with Al filter. Pulse analysis technique was applied to three element system, Cr2O3-Fe2O3-NiO mixtures, and effects of overlapped spectra were examined. Accuracies of the analysis are 0.3% for 10–20% Cr2O3, 1% for 70–100% Fe2O3 and 2% for 5–10% NiO in a counting time of one minute.
The capability of a device for the X-ray spectroanalysis is studied which essentially consists of a H3/Zr source, a helium-filled specimen chamber and a proportional counter equipped with a thin plastic window. The best results can be obtained with a 0.46 mg/cm2 polycarbonate window which allows the transmission of soft X-rays below 1 keV but stops the β-rays emitted from the source and scattered towards the window. It is shown that both the X- and β-rays from the H3/Zr source are effective in exciting the characteristic X-rays of light elements (Na, Mg, Al and Si) and the X-rays from the source are effective in exciting those of elements of intermediate atomic numbers (Ti, V, Cr, Mn, Fe Co and Ni). The K X-ray intensities for light elements are comparable to or higher than those for elements of intermediate atomic numbers. Two examples are given which illustrate the usefulness of this device in the X-ray spectroanalysis of light elements.
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