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首页> 外文期刊>Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine >Radioactivity determination of individual radionuclides in a mixture by liquid scintillation spectra deconvolution
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Radioactivity determination of individual radionuclides in a mixture by liquid scintillation spectra deconvolution

机译：液体闪烁光谱解卷积法测定混合物中单个放射性核素的放射性

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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 Sr-90, Y-90 and Sr-85, 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 Sr-85 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. (c) 2008 Elsevier Ltd. All rights reserved.
机译：光谱解卷积方法已应用于包含多个放射性核素的对数液体闪烁光谱，以确定各个组分的活性。样品光谱的形状已用于通过将每个组分的参考光谱拟合到测得的复合光谱中来解析样品中的各种组分。该程序已应用于包含Sr-90，Y-90和Sr-85的环境样品，并作为示踪剂添加到化学回收率测定中。将使用改进的基于窗口的方法获得的结果与通过伽玛射线光谱法测量Sr-85活性并减去其对LS计数率的贡献所获得的结果进行比较。证明了这种对β粒子光谱的处理代表了即使在低活性水平下也能确定混合物中这些放射性核素的快速可靠的方法。 （c）2008 Elsevier Ltd.保留所有权利。

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