Title: Radioactivity Determination of Individual Radionuclides in a Mixture by Liquid Scintillation Spectra Deconvolution
Citation: APPLIED RADIATION AND ISOTOPES vol. 66 p. 1055-1061
Publication Year: 2008
JRC N°: JRC41824
ISSN: 0969-8043
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC41824
DOI: 10.1016/j.apradiso.2008.02.052
Type: Articles in periodicals and books
Abstract: A spectrum deconvolution method has been applied to logarithmic liquid scintillation spectra containing more than one radionuclide, to determine the activity of the individual components. The shape of the sample spectrum has been used for resolving the various components in the sample by fitting the reference spectrum of each component to the measured composite spectrum. The procedure has been applied to environmental samples containing 90Sr, 90Y and 85Sr, added as a tracer for the chemical recovery determination. Comparisons are made with results obtained using a modified window-based method and results obtained by measuring the 85Sr activity by gamma-ray spectrometry and subtracting its contribution to the LS count rate. It is demonstrated that this treatment of the beta-particle spectra represents a rapid and reliable method of determining these radionuclides in a mixture, even at low activity levels.
JRC Directorate:Health, Consumers and Reference Materials

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