摘要
在实验室中利用252Cf中子源的中子辐照装置产生快中子和热中子场,测试了相同材料的三种不同组合模式中子衰减倍数,利用MCNP软件进行模拟计算。结果表明:实验测试与模拟计算偏差小于5.0%,三种组合模式对快中子屏蔽性能影响不明显,而对热中子屏蔽性能的影响高达2~3倍。
With the development of nuclear technique,neutron shielding has attracted more and more attention. In addition to related to material,material combination patterns are also crucially important for neutron shilding. In the article,fast neutron and thermal neutron fields are generated by252 Cf source and neutron attenuation multiples are measured respectively three combination patterns by the same materials. And at the same time,neutron attenuation multiples are simulated with MCNP（Monte Carlo N Particle Transport Code,MCNP） under the same conditions. By comparing the results of simulation and experiment,the differences are within 5. 0%,and the three combination patterns have no obvious effect on fast neutron shielding but strong effect on thermal neutron shielding up to 2 to 3 times.
出处
《核电子学与探测技术》
北大核心
2017年第6期599-602,共4页
Nuclear Electronics & Detection Technology
关键词
材料组合模式
中子衰减倍数
蒙特卡罗
material combination patterns
neutron attenuation multiple
Monte Carlo
