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Title of Journal: J Radioanal Nucl Chem

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Abbravation: Journal of Radioanalytical and Nuclear Chemistry

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Springer Netherlands

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DOI

10.1007/bf01082810

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ISSN

1588-2780

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Evaluation of interferences on measurements of Su

Authors: M Tayeb X Dai E C Corcoran D G Kelly
Publish Date: 2014/02/02
Volume: 300, Issue: 1, Pages: 409-414
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Abstract

A study to evaluate conditions affecting the determination of 90Sr/90Y activities in liquid samples by the tripletodouble coincidence ratio TDCR Cherenkov counting technique was conducted The Cherenkov radiation produced by the 90Y beta decay was determined using a commercially available Hidex 300 SL liquid scintillation counter The interferences of sample geometry including sample counting vial type and volume composition and sample colour on the TDCR were investigated The effects of potentially interfering beta and mixed beta–gamma emitters on the TDCR Cherenkov counting of 90Sr/90Y activities were also examined The TDCR values were used to quantify counting efficiencies of 90Y under different experimental conditions The results demonstrated that the Cherenkov counting efficiency of 90Y is independent of sample volume and counting vial size The effect of colour quenching was examined using yellow and brown foodgrade dyes The TDCR correction for colour quenching was found to be effective An evaluation of counting efficiency of different betaemitting radionuclides demonstrated that strong gamma emissions can contribute to the Cherenkov counting efficiency Overall measured radioactivity values deviated from reference values by ≤75  which is acceptable for screening applications in emergency situations

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