Prompt γ-Ray Analysis of Elements Using Cold and Thermal Reactor Guided Neutron Beams
Prompt γ-Ray Analysis of Elements Using Cold and Thermal Reactor Guided Neutron Beams
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使用冷热反应堆引导中子束对元素进行快速 γ 射线分析
DOI：
10.2116/analsci.9.185
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发表时间：
1993
影响因子：
1.6
通讯作者：
C. Yonezawa
中科院分区：
文献类型：
--
作者：
C. Yonezawa
据报道，使用安装在 JRR-3M（升级版日本第 3 号研究堆）冷和热中子束导向器上的系统，通过反应堆中子诱导瞬发 γ 射线分析 (PGA) 进行元素分析的基本检查。测量了 71 种元素的分析灵敏度和检测限。硼、Gd、Sm 和 Cd 是最敏感的元素，检测限低至 1 至 7 ng。 F、Al、V、Eu、Hf等元素的衰变γ射线与各自的瞬发γ射线相比具有更高的分析灵敏度。此外，通过特征X射线检测对几种重元素的分析灵敏度高于通过即时y射线检测。本系统可用于测定例如石墨和Be中的ppb水平的B、高纯度氧化铈(IV)中的Gd、Sm、Eu和Dy的ppb水平、以及Zr和锆合金中的H和Hf的ppm至％水平。该系统还适用于环境样品中痕量Cd、Hg的测定，也适用于各类不能破坏、溶解的样品中主量、微量元素的测定。
Basic examination of elemental analysis by a reactor-neutron-induced prompt γ -ray analysis (PGA) using a system installed at the JRR-3M (upgraded Japan Research Reactor No. 3) cold and thermal neutron beam guides is reported. Analytical sensitivities and detection limits for 71 elements were measured. Boron, Gd, Sm, and Cd are the most sensitive elements with detection limits down to 1 to 7 ng. The decay γ -rays of some elements such as F, Al, V, Eu, and Hf have a higher analytical sensitivity compared to their respective prompt γ -rays. In addition, the analytical sensitivity of several heavy elements through detection of characteristic X-rays was higher than through the prompt y-ray detection. The present system is useful for the determination of, for example, ppb level of B in graphite and Be, ppb level of Gd, Sm, Eu, and Dy in high purity cerium(IV) oxide, and ppm to % level of H and Hf in Zr and zircaloy. This system is also applicable to trace determination of Cd and Hg in environmental samples and also to major and minor elements determination in various kinds of samples that cannot be destroyed or dissolved.