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采用复合金属收集极设计的真空康普顿探测器,使伽马探测灵敏度有效提高。为表征探测器测量信号的质量和可靠性,需要对探测器的γ/n鉴别本领进行评估。应用强钴源(能量1.25 Me V)伽马和DT(能量14 Me V)中子源对这种探测效率增强的新型真空探测器灵敏度进行实验测量,采用蒙特卡罗模拟法(MC)模拟统计收集极输出净电子数的方法,对其在裂变能量区几个特征能量点的伽马、中子灵敏度进行模拟计算。结果表明:对于中子、伽马能量为1.25 Me V的情况,这种新型真空康普顿探测器的γ/n鉴别本领,理论模拟计算值为40.94,综合理论计算和实验测量结果的实验推算评估值为28.31;属于适合中子、伽马混合场中测量伽马的可选探测器。
The use of composite metal collector pole design of the Compton vacuum detector, the gamma detection sensitivity increased effectively. To characterize the quality and reliability of the detector’s measurement signal, the detector’s gamma / n discrimination capability needs to be evaluated. The sensitivity of this new vacuum probe with enhanced detection efficiency was experimentally measured using a strong cobalt source (1.25 MeV energy) gamma and DT (energy 14 MeV) neutron source. Monte Carlo simulations (MC) The method of collecting net output electron number is used to simulate the gamma and neutron sensitivity of several characteristic energy points in the fission energy region. The results show that the γ / n discrimination ability of the new vacuum Compton detector for the neutron with a gamma energy of 1.25 MeV is theoretically calculated to be 40.94, which is calculated theoretically and experimentally The estimated value is 28.31; an optional detector for measuring gamma in a gamma-mixing field for neutrons.