Measurement of the radioactivity of238U,232Th,226Ra,137Cs and40K in soil using direct Ge(Li) γ-ray spectrometry

作者: Z. Papp , Z. Dezső , S. Daróczy

DOI: 10.1007/BF02034265

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摘要: Radioactivity of the nuclides238U(235U),232Th,226Ra,137Cs and40K was measured in soil by direct γ-ray spectrometry using Ge(Li) detector. Relative laboratory method used. Soil dired, powdered, sieved and put into hemetically sealed container. CCRMP certified reference materials compounds above nuclides mixed with fine quartz sand were used as references. Five four γ-lines for determination of232Th and226Ra, respectively, to obtain more accurate results. The most significant interferences, caused limited energy resolution detector, resolved. In case ordinary soils, one day duration measurement 1 kg mass soil,232Th,226Ra can be determined less than 10% relative random error. Elevated concentrations of238U(235U) and226Ra observed samples collected around a coal-fired power plant Ajka town, Hungary.

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