Cyclic neutron activation analysis of large samples with a pulsed 14 MeV neutron source

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• 作者：Frank Mildenberger ; Eric Mauerhofer
• 关键词：LS ; CNAA ; Concrete ; Polyethylene ; Thermal neutron die ; away time
• 刊名：Journal of Radioanalytical and Nuclear Chemistry
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：311
• 期：1
• 页码：917-927
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Nuclear Chemistry; Physical Chemistry; Nuclear Physics, Heavy Ions, Hadrons; Diagnostic Radiology; Inorganic Chemistry;
• 出版者：Springer Netherlands
• ISSN：1588-2780
• 卷排序：311

文摘

A method for the analysis of 200 L steel drums filled with various amounts of concrete and polyethylene by large sample cyclic neutron activation analysis (LS-CNAA) using a pulsed 14 MeV neutron source was developed. The elemental composition obtained for the homogenous samples was found to agree well with the expected values, the differences lying between −3 and +15%. For the heterogeneous samples, the results were found to agree with the expected values within ±39%. Depending on the polyethylene content of the samples, detection limits ranging between 14 and 24 mg kg−1 for cadmium, 520 and 740 mg kg−1 for mercury and 5.5 and 53 g kg−1 for lead were achieved for a counting time of about 30 min.