Effect of radioactive decay of Pu isotopes on the determination of Pu concentration with high accuracy by isotope dilution mass spectrometry (IDMS) and isotope dilution alpha spectrometry (IDAS)

被引：0

作者：

Alamelu, D. ^{[1
]}

Aggarwal, S.K. ^{[1
]}

机构：

[1] Fuel Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India

来源：

Journal of Alloys and Compounds | 2007年 / 444-445卷 / SPEC. ISS.期

关键词：

Isotope dilution techniques; using a suitable tracer or spike isotope; are commonly used for determining Pu concentration in complex matrices like dissolver solution of irradiated fuel. One of the main reasons for this is the high accuracy achievable due to the elimination of matrix effects present in other analytical techniques. However; the radioactive decay of Pu isotopes in the tracer; if not accounted for; would lead to systematic uncertainty in the results. Taking examples of 240Pu and 238Pu tracers used in our laboratory for isotope dilution mass spectrometry (IDMS) and isotope dilution alpha spectrometry (IDAS); respectively; it is shown that depending upon the isotopic composition of the tracer and the time elapsed after tracer calibration; the radioactive decay could lead to an overall correction factor ranging from 0.1 to about 4% over a period of 5 years. The calculations shown in this work demonstrate the importance of considering radioactive decay; especially when high accuracies are desirable; e.g. in nuclear material accounting. © 2007;

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Journal article (JA)

引用

页码：643 / 646

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