狭缝式裂变探测系统的中子灵敏度解析计算方法  

Analytical calculation of neutron sensitivity of fission detector system with slot-collimator

作　　者：张小东[1] 张显鹏[1] 李宏云[1] 欧阳晓平[1] 张建福[1] 张国光[1] 夏良斌[1] 潘洪波[1] 

机构地区：[1]西北核技术研究所,西安710024

出　　处：《强激光与粒子束》2011年第2期559-562,共4页High Power Laser and Particle Beams

摘　　要：利用基于解析公式的理论方法来计算狭缝式裂变探测系统的中子灵敏度。采用积分和泰勒展开法推导了铀裂变材料在中子作用下产生的碎片数目及PIN探测器接收碎片的概率,并得到该系统的中子灵敏度理论计算公式。在D-T中子源上对该探测系统的中子灵敏度进行了实验标定,并将实验结果与解析公式计算得到的理论值进行比较。结果表明:理论计算值与实验结果保持一致,两者之间的偏差小于10%。A new method for calculating the neutron sensitivity of the slot-collimated fission detector system based on analytical formula is presented.The analytical formula of the neutron sensitivity was achieved through educing the numbers of fragments and the fragments acquisition probability of PIN detectors by the methods of integral and Taylor expansion.The neutron sensitivity was also measured on a D-T accelerator.The theoretical results derived from the formulas are consistent with the experimental ones with the deviation is less than 10%.

关 键 词：狭缝式裂变探测系统 中子灵敏度 解析公式 裂变碎片平均能量 裂变碎片接收概率 

分 类 号：O571.53[理学—粒子物理与原子核物理]