135°伴随粒子法D-T中子产额测量研究

摘要

The computing method on the anisotropy factors is investigated to monitor the D -T neutron yield u-sing the associated particle measurement. The anisotropy factor data in the range of 20 ~ 600 keV deuteron beam energy are presented for 135°associated particle measurement. The uncertainty of the anisotropy factor data is roughly estimated to be about 1.4%. A 135°associated particle measurement system is developed in ZF -300 neutron generator at Lanzhou University. An experimental test on the associated particle system is performance. The experimental results show the influence from the charged particle produced by the reaction from fast neutron and Si - detector. The uncertainty of D - T neutron yield measurement is not greater than 2%.%研究了伴随粒子法D-T中子产额测量的各向异性修正因子的计算方法,计算给出了D束流能量20 ～ 600 keV范围135°随粒子法中子产额测量的各向异性修正因子数据,数据的不确定度约为1.4％.在兰州大学Z -300强流中子发生器上建立了135°伴随粒子测量法中子产额测量系统,并进行了实验测试,结果显示,在较长的测量距离下,α粒子多道幅度谱清晰,快中子与Si探测器反应产生的带电粒子的影响可忽略,D-T中子产额测量的不确定度不大于2％.