电子俘获核素^（57）Co的绝对测量方法  

ABSOLUTE MEASUREMENT METHOD FOR ELECTRON CAPTURE NUCLIDE ￣(57)Co

作　　者：喻以光[1] 姚艳玲[1] 

机构地区：[1]中国原子能科学研究院

出　　处：《原子能科学技术》1995年第2期120-125,共6页Atomic Energy Science and Technology

摘　　要：介绍了在４π高气压正比计数器与碘化钠闪烁计数器符合装置上测量电子俘获核素￣（５７）Ｃｏ的效率外推法。测定了不同充气压力和不同工作电压对测量结果的影响。衰变率的合成不确定度为０．４％。这一方法也可用于具有类似衰变图的低Ｚ电子俘获核素的测量。An efficiency extrapolation method was used to measure the activity of￣(57)Co by the 4πβ(PPC)-γ coincidence system,and the effects of pressure and voltage on the measurement were de-scribed in detail.The method also can be used to measure the activity of the some of nuclids withsimilar decay;The total uncertainty is estimated to be about 0.4%.

关 键 词：正比计数器 电子俘获 核素 外推法 钴57 

分 类 号：TL811.2[核科学技术—核技术及应用] TL822.3