Measurement and analysis of thorium fission rate in a polyethylene shell with a D-T neutron source

Measurement and analysis of thorium fission rate in a polyethylene shell with a D-T neutron source
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D-T中子源聚乙烯壳内钍裂变速率的测量与分析

DOI:
10.1016/j.fusengdes.2016.09.013
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发表时间:
2016-12
影响因子:
1.7
通讯作者:
Liu R
Liu R
中科院分区:
工程技术3区
文献类型:
--
作者:
Zheng Lei;Yang Yiwei;Liu Zhujun;Liu Rong;Jiang Li;Wang Mei;Liu Zhujun;Yang YW;Liu R

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为了验证232Th的裂变截面,用活化法在D-T中子源的聚乙烯壳体中进行了积分实验。钍样品与入射的D+束成0°方向排列。通过测量裂变碎片85mKr发出的151.195 keV特征γ射线,确定了232Th的裂变速率,实验不确定度约为5.3%。除ENDF/B-VII.1(∼6.5%)外,在不确定度范围内,用ENDF/B-VII.1、JENDL3.3、JENDL4.0库计算MCNP的结果与实验值吻合较好。实验结果可用于重新估算232Th裂变截面。
In order to validate the232Th fission cross section, an integral experiment was carried out using the activation method in a polyethylene shell with a D-T neutron source. Thorium samples were arranged in the 0° direction to the incident D+beam. The232Th fission rate was determined by measuring the 151.195 keV characteristic γ ray emitted from the fission fragment85mKr, and the experimental uncertainties were about 5.3%. MCNP calculation results employing ENDF/B-VII.0, JENDL-3.3, JENDL-4.0 libraries are in good agreement with that of experiments within uncertainties except that employing ENDF/B-VII.1 (∼6.5%). The experiment results can be used to re-evaluate the232Th fission cross section.
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