Influence of (231)Th in the activity determination of (234)Th by Cerenkov counting. |
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| Authors: | G A Blasiyh Nu?o R O Korob |
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| Affiliation: | Comisión Nacional de Energía Atómica, Centro Atómico Ezeiza, Presbítero Juan González, y Aragón No. 15, B1802AYA, Partido de Ezeiza, Provincia de Buenos Aires, República Argentina. blasiyh@cae.cnea.gov.ar |
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| Abstract: | A precise and simple method for the determination of (234)Th activity by Cerenkov counting is described. A calibrated natural uranium solution (having (234m)Pa and (238)U in secular equilibrium) in 0.1M HNO(3) is used to construct the calibration curve. Because (231)Th (a beta-emitting nuclide present in the decay chain of (235)U) contribution to Cerenkov counting is experimentally proved to be negligible only in the case of low enriched uranium samples, simple calculations are needed to accomplish the activity determination. |
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