论文部分内容阅读
清华微型脉冲强子源(CPHS)靶站屏蔽设计需同时考虑屏蔽不同能量中子和γ射线。为了在有限空间内达到放射性防护的要求,CPHS研制了一种复合辐射屏蔽材料。该材料利用环氧树脂和环氧树脂固化剂将聚乙烯颗粒、无水硼砂和纯铅粒有机结合在一起,浇筑成型,弥补了单一屏蔽材料对混合源屏蔽效率低的缺点。利用Monte Carlo程序对比研究了新复合材料、聚乙烯和铅对14MeV、1MeV及25.3meV中子及次级γ射线的屏蔽性能。结果表明,研制的混合屏蔽材料对各种能量中子及其次级γ射线的屏蔽效果均优于单一材料。
Tsinghua Micro Pulse Burstance (CPHS) target station shielding design must consider shielding different energy neutrons and gamma rays. To meet radiological protection requirements in limited space, CPHS has developed a composite radiation shielding material. The material uses epoxy resin and epoxy resin curing agent to polyethylene particles, anhydrous borax and pure lead particles organic combination, pour molding, to make up for a single shielding material on the hybrid source low shielding shortcomings. The Monte Carlo program was used to compare the shielding properties of new composites, polyethylene and lead to 14MeV, 1MeV and 25.3meV neutron and secondary γ-rays. The results show that the shielding effectiveness of the hybrid shielding materials prepared for all kinds of energy neutrons and their secondary gamma rays are better than that of single materials.