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载钆液闪探测器是高能物理及核物理实验中重要的粒子探测工具。通过研制得到了一台大体积的直径为30 cm等高圆柱形载钆液闪探测器,载钆液闪溶液的载钆量为0.5%wt;利用252Cf中子源进行了中子与γ分辨性能实验测试,结果表明,直径30 cm等高圆柱形载钆液闪的中子与γ分辨性能较差;利用飞行时间技术通过符合测量的方法,分别测量了中子与伽马分辨谱中的中子与γ信号的时间分布,两者峰位之间的时间差为2 ns;利用252Cf裂变电离室的裂变碎片信号作为开门信号,通过符合测量的方法,获得了直径30 cm等高圆柱形载钆液闪的中子俘获时间分布实验数据,中子俘获平均时间为11μs。对于较大体积条件下,载钆液闪的中子与γ分辨性能较差的物理现象,通过实验给出了合理解释和分析。
Carrier Gadolinium Flash Detector is an important particle detection tool in high-energy physics and nuclear physics experiments. A large volume cylindrical gadolinium detector with a diameter of 30 cm and a carrier gadolinium content of 0.5% wt was obtained by developing a neutron-gamma detector with 252Cf neutron source The experimental results show that neutron and γ resolution performance of cylindrical DCM with diameter of 30 cm is poor. By using the time-of-flight technique, the neutron-gamma resolving spectrum The time difference between the two signals is about 2 ns. The fission fragment signal of the 252Cf fission ionization chamber is used as the signal for opening the door. By coincidence measurement, Liquefied neutron capture time distribution experimental data, the average neutron capture time of 11μs. For a large volume of conditions, the gadolinium liquid flash neutron and γ-poor performance of the physical phenomena of physics, through experiments to give a reasonable explanation and analysis.