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本文建议在窄中子脉冲辐射场中,采用银探测器作为中子监测器。它是由包有0.25mm厚的银箔的βG-M计数管置于6.5cm厚的石蜡慢化体内,以及包有0.4mm厚的锡箔的βG-M计数管置于同样厚度的慢化体内联合组成的。我们在日本高能物理研究所(KEK)的500MeV质子同步加速器(增强器)的束流捕集器的屏蔽墙外窄中子脉冲场中做了实验。比较了银探测器、雷姆计以及包有6.5cm厚的柱状聚乙烯BF_3管等探测器的剂最响应。从原则上证明了银探测器在脉冲场中有良好的剂量响应。雷姆计和包有聚乙烯的BF_3计数管在脉冲场中则有较大的漏计,在本实验的辐射场最强处,它们的漏计可达75%,而银探测器的漏计不超过2.5%。
This paper suggests that silver detectors be used as neutron detectors in narrow-neutron pulsed radiation fields. It was placed in a 6.5 cm thick paraffin-embedded body with a βG-M counter tube coated with 0.25 mm thick silver foil and a βG-M counter tube with a 0.4 mm thick tin foil placed in the same thickness of moderated body Composed of. We experimented in a narrow neutron pulse field outside the shielding wall of a 500 MeV proton synchrotron (enhancer) beam catcher at the Japan Institute for High Energy Physics (KEK). Compare the silver detector, the Rehm meter, and the detector covered with 6.5cm thick columnar polyethylene BF_3 tube. It is in principle proved that the silver detector has a good dose response in the pulsed field. In the pulsed field, the Ream meter and the BF_3 counter tube with polyethylene have a larger leakage meter. In the strongest radiation field in this experiment, their leakage meter can reach 75%, while the leakage detector of the silver detector Not more than 2.5%.