用于D-D、D-T混合能量中子测量的长计数器研究  

Study on Long Counters for Measurement of D-D and D-T Mixed Neutrons

作　　者：艾杰[1] 代红跃[1] 文延伟[1] 范锐锋[1] 马景芳[1] 刘小平[1] 刘进[1] 

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621900

出　　处：《核电子学与探测技术》2010年第11期1466-1468,共3页Nuclear Electronics & Detection Technology

摘　　要：对De Pangher长计数器的能量响应曲线进行了理论模拟。计算结果表明:在De Pangher长计数器前端增加一定厚度的聚乙烯慢化体,可使其对D-D、D-T中子的探测效率基本相同,从而实现D-D、D-T混合能量中子的测量。在加速器上对这种结构的长计数器进行了效率刻度,结果表明,当聚乙烯材料厚度约为9 cm时,长计数器对D-D、D-T中子的探测效率相等。Simulations were done on the De Pangher neutron counters＇ measuring efficiency.Simulating results showed that when some polyethylene was added before a neutron counter,the neutron counter can measure D-D and D-T with about the same efficiency.So this kind of neutron counter can be used to measure D-D and D-T mixed neutrons.Experiments were done on the accelerator to calibrate the measuring efficiency of the new designed neutron counter for D-D and D-T neutrons.Results showed that when the length of polyethylene is 9 cm,the neutron counter measure D-D and D-T neutrons at the same efficiency.

关 键 词：混合中子 中子测量 长计数器 

分 类 号：O571.53[理学—粒子物理与原子核物理]