Evaluation of shielding performance for newly developed composite materials
Evaluation of shielding performance for newly developed composite materials
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DOI：
10.1016/j.anucene.2018.01.022
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发表时间：
2018-06-01
影响因子：
1.9
通讯作者：
Ji, Wei
中科院分区：
文献类型：
--
作者：
Evans, Beren R.;Lian, Jie;Ji, Wei
随着制造技术的进步，由具有不同辐射相互作用性质的同位素组成的复合材料可以被制造并用作有效的辐射屏蔽材料。这项工作详细调查背后的新开发的复合屏蔽材料的成功的因素。利用蒙特卡罗模拟方法评估了四种不同复合材料的中子屏蔽能力和二次辐射产生特性：铝硼碳化物，钨硼碳化物，硼硅酸铋玻璃，和Metathene。在不同能谱的中子辐照下进行了研究，结果表明，钨硼碳化物是最有效的复合屏蔽材料。然后，从组成材料和相互作用机制的宏观横截面的贡献进行分析，试图更好地了解所研究的复合材料的相对屏蔽性能。该分析发现，增加的热吸收剂含量与热和超热中子能量区域内的改进的中子屏蔽性能相关，并且含有低Z材料的复合材料在更快的中子能量区域内表现出更大的屏蔽性能。(C)2018爱思唯尔有限公司版权所有
With the advancement of fabrication technology, composite materials that consist of isotopes with different radiation interaction properties can be manufactured and used as effective radiation shielding materials. This work details an investigation into the contributing factors behind the success of newly developed composite shielding materials. Monte Carlo simulation methods were utilized to assess the shielding capabilities for neutron and the secondary radiation production characteristics in four different composite materials: aluminum boron carbide, tungsten boron carbide, bismuth borosilicate glass, and Metathene. The study is performed under neutron irradiations with various energy spectra.The resulting data regarding shielding performance and generated secondary radiation suggested that tungsten boron carbide was the most effective composite shield material. An analysis of the macroscopic cross-section contributions from constituent materials and interaction mechanisms was then performed in an attempt to better understand the relative shielding performance of the investigated composite materials. This analysis found that increased thermal absorber content was associated with improved neutron shielding performance within both the thermal and epi-thermal neutron energy regions and that composites containing low Z material demonstrated greater shielding performance within the faster neutron energy regions. (C) 2018 Elsevier Ltd. All rights reserved.