Abstract
Simultaneous isotopic analysis of uranium and plutonium using thermal ionization mass spectrometer coupled to a multi-collector detection assembly with 9 Faraday cups has been reported earlier. Subsequently investigations have been carried out (1) to understand the applicability of correction methodologies available to account for the contribution of238Pu at238U and (2) to evaluate the effectiveness of these methodologies on the accuracy of235U/238U atom ratio being determined, particularly when samples containing different U/Pu atom ratios. Isotopic fractionation for both U and Pu in the simultaneous isotopic analysis has been compared with the results of the individual analysis of these elements. The different isotopic fractionation factors observed for U were attributed to different conditions of analysis. There was no significant difference in the isotopic fractionation patterns for Pu. The consideration to extend this method to actual samples from our observations on synthetic samples with diferent U/Pu atom ratios containing U and Pu isotopic reference standards is described.
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Ramakumar, K.L., Jeyakumar, S., Rao, R.M. et al. Simultaneous analysis of uranium and plutonium using thermal ionization mass spectrometry. Journal of Radioanalytical and Nuclear Chemistry, Articles 190, 121–136 (1995). https://doi.org/10.1007/BF02035643
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DOI: https://doi.org/10.1007/BF02035643