Methodology for determination of Sr-89 and Sr-90 in radiological emergency: I. Scenario dependent evaluation of potentially interfering radionuclides

摘要

Early determination of Sr-89 and Sr-90 in radiological emergency is hampered by the presence of interfering short-lived fission products. In this study, three commonly used radioanalytical strategies for Sr-89 and Sr-90 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 Sr-89, followed by an yttrium separation and counting of Y-90. Sr-89 and Sr-90 could be determined about 5 and 9 days after a nuclear explosion, respectively.