Abstract
The technique of INAA for the determination of the rare earth elements with respect to prospecting and production testing of polishing powders on the basis of rare earth element oxides as well as quality testing of ultragrade rare earth compounds is discussed.
In order to count γ-radiation of the radioactive nuclei a Ge-Li-detector as well as a planar Ge-Li-detector have been used. The latter enables the evaluation of the low energetic side of the γ-spectrum without complicated corrections due to γ-line interferences. Therefore an efficient working procedure with respect to the determination of the distribution pattern of the rare earth elements is possible.
A simple correction program however is necessary with respect to the use of the planar detector type, allowing for effects of self-absorption geometry of the sample as well as distance sample-detector. This program is also given in the paper.
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Literatur
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Kiesl, W., Kluger, F. & Lindbauer, R. Die zerstörungsfreie Bestimmung der Seltenen Erdelemente nach der Neutronenaktivierung. Monatshefte für Chemie 111, 681–691 (1980). https://doi.org/10.1007/BF00903322
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DOI: https://doi.org/10.1007/BF00903322