快中子在Li核上的弹性散射微分截面  

The Differential Cross Section of Elastic Scattering of Fast Neutrons on Li

作　　者：张坤[1] 曹建华[1] 万代蓉[1] 戴运生[1] 吴小华[1] 

机构地区：[1]四川大学原子核科学技术研究所

出　　处：《高能物理与核物理》1995年第10期879-883,共5页High Energy Physics and Nuclear Physics

摘　　要：用伴随粒子飞行时间法测量了１４．７ＭｅＶ中子在６Ｌｉ和７Ｌｉ核上的弹性散射截面，并用蒙特卡罗方法对中子在样品中的通量衰减、多次散射作了修正．本文工作与他人工作以及理论数据作了比较．给出了截面的勒让德系数；截面实验点总误差在１０％到１５％之间，其中统计误差为１％－５％．The differential cross section of fast neutrons on 6Li and 7Li has been measured at 14.7MeV using associated particle time-of-flight technique.Scattered neutrons are detected at 9 angles from 35 to 115 deg in massively shielded ST451 liquid scintillator located 254cm from the scattering sample.The efficiency curve of neutron detector was determined by measuring the n-p scattering in polyethylence. The total error of the differential cross section is from 10% to 15% including the statistical error of 1.0-5.0%and the measurment error of efficiency curve of 6.0%7.5 %.

关 键 词：快中子 弹性散射 微分截面 锂核 

分 类 号：O571.523[理学—粒子物理与原子核物理] O571.418[理学—物理]