在特定实验条件下的散射中子本底研究  

Study on scattering neutron background under specific condition of experiment

作　　者：刘荣[1] 蒋励[1] 王玫[1] 刘成龙[1] 王大伦[1] 励义俊[1] 杨可[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳919信箱621900

出　　处：《核电子学与探测技术》2001年第4期241-243,249,共4页Nuclear Electronics & Detection Technology

基　　金：中国工程物理研究院科学基金资助项目(批准号 :990 2 12 )

摘　　要：研究了 d- T中子源与探测器距离较近时 ,扣除实验大厅散射中子本底的方法。实验上采用屏蔽法 ,用了铀裂变电离室。用 MCNP/ 4 A程序和 FENDL2库数据计算了实验大厅散射中子本底曲线。采用实验和计算相结合的方法扣除了在特定实验条件下的散射中子本底 。When the neutron detector is near to d T neutron source, the method for deducting the scattering neutron background is studied. In the experiment, the neutron background level has been studied by using uranium fission chambers and the method of shielding. The distribution of the scattering neutron background in the experimental hall has been calculated by MCNP/4A code and FENDL2 library data. By the comparison of the experimental and calcutational results the scattering neutron background under the specific condition has been deducted. The method is feasible.

关 键 词：散射中子本底 屏蔽法 MCNP/4A程序 中子物理实验 反射中子 测量 探测器 

分 类 号：O571.5[理学—粒子物理与原子核物理] TL816.3[理学—物理]