4πβ-γ反符合法测量^(60)Co和^(134)Cs活度  

Absolute Radioactivity Measurement of ^(60)Co and ^(134)Cs by 4πβ-γ Anti-coincidence Method

作　　者：王国军[1] 吕晓侠[1] 汪建清[1] 陈细林[1] 喻以光[1] 

机构地区：[1]中国原子能科学研究院放射性计量测试部,北京102413

出　　处：《原子能科学技术》2002年第1期39-42,共4页Atomic Energy Science and Technology

摘　　要：研制建立了国内第 1套 4πβ γ反符合活度测量标准装置。用该装置测量了6 0 Co、134 Cs的活度 ,活度测量值的合成标准不确定度分别为 0 2 4%、0 3 3 %。将测量结果与中国计量科学研究院和中国原子能科学研究院的 4πβ γ符合活度测量标准装置的测量结果进行了比对 。A 4πβ γ anti coincidence system is developed for absolute radioactivity measurement.In this system,a dual ADC live time HPGe γ spectroscopy is used as the γ ray detector,and a 4πβ proportional counter is employed for the β detector. The activities of 60 Co and 134 Cs are measured by this system. The combined standard uncertainty of 60 Co and 134 Cs is 0.24% and 0.33%,respectively. The results are compared with that from 4πβ γ coincidence counting system of NIM and CIAE and the agreement of these results is satisfactory.

关 键 词：4πβ-γ反符合 活度 钴60 铯134 测量 原子核衰变 Γ谱仪 

分 类 号：O571.32[理学—粒子物理与原子核物理] O615.13[理学—物理]