论文部分内容阅读
在飞行时间方法测量 2 0 0keV— 1 2MeV能区内2 48Cm和2 5 2 Cf自发裂变瞬发中子谱 ,以国际原子能机构推荐的2 5 2 Cf自发裂变瞬发中子谱为标准 ,可以免去探测器效率刻度的问题并消除系统误差 ,提高测量精度 .实验用一个微型电离室作为裂变碎片探测器 ,两个芪晶体中子探测器测量中子及一套基于微机的距离分别为 3 2 ,50和 1 0 0cm ,经过对数据的处理和分析给出了 2 0 0keV— 1 2MeV的中子能区内的实验数据 .用Maxwell分布对实验数据进行拟合 ,得到的核温度为 (1 4 0 1± 0 0 0 6)MeV .
In the time-of-flight method, the spontaneous fission instantaneous neutron spectra of 2 48Cm and 2 5 2 Cf in the 200 keV-1 2MeV energy range are measured. Based on the spontaneous fission instantaneous neutron spectrum of 2 5 2 Cf recommended by the International Atomic Energy Agency Eliminating the problem of calibration of detector efficiency and eliminating systematic errors and improving the measurement accuracy.A miniature ionization chamber was used as a fission fragment detector and two neutron detector neutrons and one set of computer-based distance were 3 2, 50 and 1 0 cm, the experimental data in the neutron energy region of 200 keV-1 2MeV are given after the data processing and analysis.With the Maxwell distribution fitting the experimental data, the core temperature obtained is ( 1 4 0 1 ± 0 0 0 6) MeV.