屏蔽复合材料对快中子减弱效果的计算及实验验证

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Calculation and Experimental Verification of Shielding Composites against High-Speed Neutrons Attenuation

摘要: 在分出截面法的测试方法及其原理的基础上,根据经验公式对制备的几种复合材料及其各组成元素的宏观分出截面、微观分出截面进行理论计算,并以实验测得的张弛长度和透射率对实验结果进行验证,对计算与实验结果的差异及影响因素进行分析。结果表明,对于20 mm厚的4种复合材料板的快中子透射率,实测结果小于计算结果约10%,分出截面法对计算快中子屏蔽效果是有效且实用的。
- 分出截面法 /
- 屏蔽复合材料 /
- 快中子 /
- 实验验证
Abstract: Based on the test method and theory of the removal cross section, the macro and micro removal cross sections of 4 different composites and relative elements have been calculated, and experimentally verified by the relaxation length and transitivity percent. The results indicate that, the tested transitivity values for 4 different composite plates（20 mm） are all 10% higher than those of calculated, which validate the availability and practicability of removal cross section used in the neutron shielding calculation. Finally, the differences and influential factors of calculated values and test values have been analyzed in detail.
- Removal cross section method /
- Shielding composite /
- High-speed neutron /
- Experimental verification