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Updated: Jun 5, 2026

Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides
Published on: May 20, 2019
Determination of (238)U in ground-water samples using gamma-ray spectrometry
1Jožef Stefan Institute, Jamova cesta 39, Ljubljana, Slovenia. matjaz.korun@ijs.si
Abstract:
A method for measuring the low activity concentration of (238)U in water is described. Samples of 50L were evaporated and the dry residue after evaporation was measured. Typically, 30 g of material was obtained for the samples processed in this way. Based on measuring the samples using a gamma-ray spectrometer, equipped with a germanium crystal having a diameter of 8 cm and a beryllium window, the decision threshold resulting from the measurements was assessed to be 1.5 Bq/m(3). A total of 26 samples of ground water were processed and activity concentrations of up to 20 Bq/m(3) were measured. However, most of the results were in a range around 5 Bq/m(3).
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