Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English   Periodicity: 4 times per year   Open access peer reviewed journal

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M. V. Zheltonozhska, N. V. Kulich, A. I. Lypska, V. I. Nikolaev, M. V. Strilchuk

Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine

Abstract: Nonradiochemical method of measurement of ⁹⁰Sr and ¹³⁷Cs activity in environmental samples is proposed. This method is based on spectrometrical investigation of electrons accompanied the decay of the ⁹⁰Sr and ¹³⁷Cs. Accounting for the contribution to the total activity of the samples from the zones with the density of the contamination 1 - 5 Ci/km² the ⁴⁰K electrons allowed to improve the accuracy of the measurements for the samples of small rodents up to 15 - 20 % (the ratio of A (¹³⁷Cs)/A (⁹⁰Sr) was from 2 to 100), for samples of soil up to 10 - 15 % (the change of activity in these samples was ten thousand times). The results of the spectrometric measurements were confirmed by the traditional radiochemical research.

Keywords: strontium, cesium, spectrometrical measurements, electrons.

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