Untersuchungen an Geologischen Materialien Durch Messung der Natürlichen Gamma-aktivität
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Investigations of natural activity of several geological materials by γ-spectrometry using a Ge(Li)-detector are described. The determination of thorium and uranium contents is possible up to minimum concentrations of about 10 ppm Th and 1 ppm U. The results of this method are compared with results of different methods of activation analysis. In the most cases the agreement is very well. If the decay-chain of238U is not in equilibration, it is possible to estimate the geological oldness of the sample in a range between about 20 000 and 200 000 years.
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