G-M计数管用于环境γ辐射监测  

MONITORING FOR ENVIRONMENTAL γ RADIATION USING G M COUNTER

作　　者：岳清宇[1] 王文海[1] 金花[1] 

机构地区：[1]中国原子能科学研究院

出　　处：《辐射防护》1999年第2期132-134,共3页Radiation Protection

摘　　要：为测量环境γ辐射周围剂量当量，对Ｇ－Ｍ计数管的自身本底和能量响应特性进行了实验研究。采用铅、锡两种金属材料做为过滤器改变计数管的能量响应，为拓宽仪表量程采用两种尺寸计数管。两种计数管在６０ｋｅＶ至６６２ｋｅＶ范围内，Ｈ＊（１０）／Ｘ随能量变化与ＩＣＲＵ４７号报告结果最大偏离分别为－２３％和＋２４％，仪表量程为１０ｎＳｖ·ｈ－１～１０ｍＳｖ·ｈ－１，探测下限可达到４０ｎＳｖ·ｈ－１。For measuring H *(10) from environmental γ radiation, the background and energy response of G M counter was studied. The energy response can be improved by a filter consisted of Sn and Pb. In order to extend the measuring range, we used two counters with different size. For two improved G M counters, the maximum deviations of H *(10) varing as energy of γ radiation from the results given by ICRU 47 are -23% and +24%, respectively between 60 keV and 662 keV. The instrument range is 10 nSv·h -1 ～10 mSv·h -1 , and the lower limit of detection is in the order of 40 nSv·h -1 . (

关 键 词：G-M计数管 能量响应 环境监测 γ辐射监测 

分 类 号：X837[环境科学与工程—环境工程] TL811.3[核科学技术—核技术及应用]