Methodology for determination of 89Sr and 90Sr in radiological emergency: I. Scenario dependent evaluation of potentially interfering radionuclides |
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Authors: | Annika Tovedal Ulrika Nygren and Henrik Rameb?ck |
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Institution: | (1) Division of CBRN Defence and Security, Swedish Defence Research Agency (FOI), 901 82 Ume?, Sweden |
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Abstract: | Early determination of 89Sr and 90Sr in radiological emergency is hampered by the presence of interfering short-lived fission products. In this study, three
commonly used radioanalytical strategies for 89Sr and 90Sr were evaluated theoretically considering their suitability in a nuclear explosion scenario. The methods were evaluated
with respect to the need for decay time of interfering short-lived strontium and yttrium isotopes, and reduction of other
known interfering nuclides prior to measurement. The strategy shown to be most successful included initial separation of strontium
and determination of 89Sr, followed by an yttrium separation and counting of 90Y. 89Sr and 90Sr could be determined about 5 and 9 days after a nuclear explosion, respectively. |
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