国产LaCl_3无机闪烁体抗14MeV中子干扰能力的测量  

Measuring the Capability of Resisting 14 MeV Neutron Yawp of Domestic LaCl_3 Scintillator

作　　者：胡孟春[1] 李忠宝[1] 周刚[1] 王栋[1] 唐登攀[1] 张建华[1] 司粉妮[1] 黄雁[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11期1342-1345,共4页Nuclear Electronics & Detection Technology

摘　　要：在14 MeV中子辐射场环境下测量裂变γ脉冲辐射,应用LaCl_3构成的新型探测器,既需要准确知道LaCl_3对γ辐射的灵敏度,同时必须知道LaCl_3抗14 MeV中子干扰的能力。在稳态γ辐射源场中分别对LaCl_3和CeF_3所构成闪烁探测器的γ绝对灵敏度进行标定,在宽度是μs级的DT(14 MeV)脉冲中子源场中分别对同样构成的闪烁探测器中子相对灵敏度进行测量,通过以前测量的CeF_3抗14 MeV中子干扰的能力数据推算出LaCl_3抗14 MeV中子干扰的能力。测量结果表明:LaCl_3与CeF_3抗14 MeV中子干扰的能力是相当的,电荷法测量结果两者比值接近1,峰值电流法测量结果两者比值接近2;LaCl_3与ST401抗14 MeV中子干扰能力的比值大于10。When measuring γpulse in 14 MeV neutron radiation field with LaCl 3 scintillator , theγsensitivity is necessarily know .At the same time , the capability of resisting 14 MeV neutron yawp should also be necessarily know, too.In this paper, theγsensitivities of LaCl3 and CeF3 are measured in steady γradiation field, and the neutron sensitivities of both are measured in 14 MeV pulse neutron radiation field which FWHM is about 10 -6 s. The capability of resisting 14 MeV neutron yawp of LaCl 3 scintillator is calculated according to that of CeF 3 scin-tillator .The result shows that the capability of resisting 14 MeV neutron yawp of LaCl 3 is comparative with that of CeF3 .The ratio of above results adopting electric charge method is 1, the ratio of above results adopting peak value method is closely 2 .The ratio of capability of resisting 14 MeV neutron yawp of LaCl 3 and ST401 is more 10 .

关 键 词：无机闪烁体 LACL3 CeF3 ST401 辐射探测 中子源 中子灵敏度 LACL3 CeF3 ST401 

分 类 号：TL812[核科学技术—核技术及应用] TL816