长计数器探测效率的相对标定  

Calibration of Relative Detection Efficiency for Neutron Long Counter

作　　者：程亮[1] 戴晶怡[1] 梅林[1] 

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621900

出　　处：《原子能科学技术》2008年第2期177-179,共3页Atomic Energy Science and Technology

摘　　要：利用241Am-Be中子源对长计数器的探测效率进行相对标定,并采用伴随粒子法测定5.1 MeV与14 MeV中子间的能量转换系数。同时,利用蒙特卡罗方法对长计数器探测效率及其相应的能量转换系数进行模拟计算。在本工作的实验条件下,探测效率实验刻度值的不确定度为10.8%,模拟计算值的不确定度为2.3%,两者在不确定度范围内一致。The relative detection efficiency of neutron long counter was calibrated with 241^Am-Be neutron source. Energy conversion coefficient between 5.1 MeV and 14 MeV was also determined by the associated particle method. At the same time, the relative detection efficiency and energy conversion coefficient were calculated with Monte-Carlo method. In present work, the uncertainty of relative detection efficiency from experiment and calculation is 10.8% and 2.3%,respectively. Both are coincident in the range of uncertainty.

关 键 词：BF3中子探测器 蒙特卡罗方法 探测效率 能量转换系数 

分 类 号：TL81[核科学技术—核技术及应用]