“核-光转换”中子探测器物理结构的优化设计  

Optimized Design of the Structure of Nuclear-Optical Converters for Neutron Detection

作　　者：李波均[1] 张建华[1] 彭太平[1] 王立宗[1] 朱学彬[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621900

出　　处：《核电子学与探测技术》2013年第10期1207-1210,共4页Nuclear Electronics & Detection Technology

摘　　要：针对裂变中子时间谱和总数测量的需求背景和目前中子伽马混合辐射场中脉冲裂变中子测量所面临的技术困难,根据物理过程和探测机理,对"核-光转换中子探测器"测量脉冲中子进行定性分析,并采用Geart4程序进行模拟理论研究,总结出探测器物理结构的最优化参数组合;并加工研制了实验用的"核-光转换中子探测器",在DPF和强钴源上标定了探测器的中子和伽马灵敏度,理论数据与实验结果的相对比值基本一致,最后通过定性与理论计算相结合的方法,得出了"核-光转换中子探测器"具有中子伽马甄别测量能力高、测量线性范围宽、中子能量响应较为平坦、时间响应较快等优点。Focuses on the technical difficulties at present in measuring the time spectrum and the total number of pulsed fission neutrons in mixed radiation field. According to physical process and measuring principle, ＂Nu- clear - optical Converters detector＂ was analyzed in theory and simulated by Geant4. Then the optimized param- eter of detector structure was obtained. Furthermore the neutron and gamma - ray sensitivities of the detector are measured on DT neutron of DPF equipment and 6~Co gamma - ray radiation sources respectively. The results show that the ＂Nuclear- optical Converters detector＂ which is for pulsed fission neutron measurement has high neutron/gamma- ray measurement SNR, large linear range ,fiat neutron energy- response, fast response time.

关 键 词：“核-光转换”中子探测器 中子伽马甄别 中子能量响应 

分 类 号：TL816.3[核科学技术—核技术及应用]