Effects due to a Pu-C source on a HPGe detector and the corresponding neutron shielding  

作　　者：张建勇 傅成栋 莫晓虎 张子良 李道武 王宝义 

机构地区：[1]Institute of High Energy Physics, CAS [2]Chengdu Science and Technology University

出　　处：《Chinese Physics C》2011年第7期660-667,共8页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10491303, 10775412, 10825524);Instrument Developing Project of Chinese Academy of Sciences (YZ200713);Major State Basic Research Development Program (2009CB825200, 2009CB825203,2009CB825206);Knowledge Innovation Project of Chinese Academy of Sciences (KJCX2-YW-N29)

摘　　要：A gamma spectrum of a Pu-C source is measured using a p-type HPGe detector, whose three peaks （full energy, single-escape and double-escape peak） can be used as a calibration source for the beam energy measurement system of BEPCII. The effect of fast neutron damage on the energy resolution of the HPGe detector is studied, which indicates that the energy resolution begins to deteriorate when the detector is subject to 2×107 n/cm^2 fast neutrons. The neutron damage mechanism and detector repair methods are reviewed. The Monte Carlo simulation technique is utilized to study the shielding of the HPGe detector from the fast neutron radiation damage, which is of great significance for the future commissioning of the beam energy measurement system.A gamma spectrum of a Pu-C source is measured using a p-type HPGe detector, whose three peaks （full energy, single-escape and double-escape peak） can be used as a calibration source for the beam energy measurement system of BEPCII. The effect of fast neutron damage on the energy resolution of the HPGe detector is studied, which indicates that the energy resolution begins to deteriorate when the detector is subject to 2×107 n/cm^2 fast neutrons. The neutron damage mechanism and detector repair methods are reviewed. The Monte Carlo simulation technique is utilized to study the shielding of the HPGe detector from the fast neutron radiation damage, which is of great significance for the future commissioning of the beam energy measurement system.

关 键 词：Pu-C source HPGe detector neutron shielding 

分 类 号：O572.212[理学—粒子物理与原子核物理]