不同材料中子反射与屏蔽效应研究

发布时间：2017-12-28 06:20

本文关键词：不同材料中子反射与屏蔽效应研究　出处：《核技术》2017年03期 　论文类型：期刊论文

【摘要】：利用Monte Carlo粒子输运计算程序Super MC对厚度1-5 cm的多种材料进行中子反射和屏蔽性能分析计算。这些材料包括金属材料铍、铅、铜、含硼钢以及~(238)U和非金属材料聚乙烯、氢化锂、混凝土,中子能段选取10~(-5) e V-20 MeV。结果显示,中子反射能力和屏蔽性能都会随着材料厚度而增加,但增加的幅度逐渐减小。铍和聚乙烯在中子反射和屏蔽方面性能优越,而常用来屏蔽γ射线的铅在这两方面性能都是8种材料中最差的。~(238)U只在材料厚度很小时性能卓著,随着材料厚度增加,其性能便远不如大部分材料。考虑到聚乙烯的力学性能较差,在屏蔽材料的选择上有很大的限制,所以在8种材料中,铍的综合性能相对较好。
[Abstract]:The Monte Carlo particle transport computing program Super MC is used to calculate the neutron reflection and shielding performance of a variety of materials with a thickness of 1-5 cm. These materials include metals lead, copper, beryllium, boron steel and ~ (238) U and non metal material polyethylene, lithium hydride, concrete, neutron selected 10~ (-5) e V-20 MeV. The results show that both the neutron reflectivity and the shielding performance will increase with the thickness of the material, but the increase in the amplitude decreases gradually. Beryllium and polyethylene are superior in neutron reflection and shielding, and the lead often used to shield gamma rays is the worst of the two properties in these 8 materials. The performance of ~ (238) U is excellent only when the thickness of the material is very small. With the increase of the thickness of the material, its performance is far inferior to that of most materials. Considering the poor mechanical properties of polyethylene, the selection of shielding materials is very limited, so in the 8 materials, the comprehensive performance of beryllium is relatively good.
【作者单位】：火箭军工程大学核工程系;海军装备研究院;
【基金】：国家自然科学基金(No.51401237)资助~~
【分类号】：O571.5
【正文快照】： Supported by National Natural Science Foundation of China(No.51401237)First author:DING Xiong,male,born in1993,graduated from Rocket Force University of Engineering in 2015,master student,focusing on nuclearradiation and shielding effectCorresponding aut

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