氘氘中子产额铟活化诊断方法  

DD neutron yield diagnosis by indium activation

作　　者：宋仔峰[1] 陈家斌[1] 唐琦[1] 詹夏宇[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《强激光与粒子束》2012年第5期1165-1168,共4页High Power Laser and Particle Beams

摘　　要：提出了活化法测量DD中子产额的实验方法,该方法可提高DD中子产额测量的精度。方法基于铟同位素115In与DD中子的非弹性散射反应,活化反应释放的γ射线被HPGe探测器记录,根据活化系统标定灵敏度推算出中子产额。分析了探测器记录的活化γ射线数与中子产额间的关系。介绍了一套活化测量的系统设计。通过蒙特卡罗方法模拟了活化样品出射的γ射线数与样品厚度的关系,模拟结果表明:样品厚度取为1cm可兼顾活化效率和测量精度。在加速器上对铟活化样品进行了标定实验,实验结果表明:在聚变中子产额大于2×109的实验中可使用铟活化诊断方法,中子产额测量的相对标准误差在10%以内。随着聚变中子产额的不断提高,铟活化测量中子产额的精度可进一步提高。The measurement of DD neutron yield by activation is presented.This method is based on the inelastic scattering reaction of 115In with DD neutron,and the activated γ spectrum is counted by HPGe detector.The relation between the counts of detected γ rays and the neutron yield is analyzed.The optimal thickness of sample is given by Monte Carlo simulation,which is 1 cm.The entire counting system has been calibrated on the K-400 accelerator.The result shows that the DD neutron measurement by indium activation can be used in the ICF experiment when the neutron yield is above 2×109.The total error of the system is below 10% in this condition.The total error will reduce when the neutron yield is larger.

关 键 词：DD中子产额 铟活化 实验标定 蒙特卡罗模拟 

分 类 号：TL816.3[核科学技术—核技术及应用]