^(123)Xeγ射线发射几率的实验测定  

Determination of γ emission probability of ^(123)Xe

作　　者：何小兵[1] 解峰[1] 师全林[1] 常永福[1] 党海军[1] 于伟翔[2] 张小林[1] 刘杰[1] 

机构地区：[1]西北核技术研究所,西安710024 [2]中国原子能科学研究院核物理研究所,北京102413

出　　处：《核技术》2011年第5期362-367,共6页Nuclear Techniques

摘　　要：气体放射性核素^(123)Xe的γ射线发射几率是^(123)Xe活度测量过程中的一个重要核衰变参数,目前尚未有关实验直接测量数据的文献报导。本文测量^(123)Xe和^(123)I均匀同分布的固体源,根据母子体关系,由^(123)I的活度得到^(123)Xe的活度,通过标定^(123)Xe的效率,实验测定^(123)Xe 148.9 keVγ射线发射几率P_γ(148.9)为48.64%(1±2.7%)。An important nuclear parameter of ^123Xe, a gaseous radioactive nuclide, is its emission probability of 148.9 keV γ-ray. While it has been estimated, experimental determination of the parameter has not been found from literatures. In this paper, ^123Xe and its daughter ^123I are measured and the activities of ^123Xe are obtained through parent-daughter relationship. By calibrating the measurement efficiency of ^123Xe, the measured emission probability is 48.64% （1±2.7%）.

关 键 词：^123Xe 发射几率 固体源 最小二乘法 HPGE探测器 

分 类 号：TL84[核科学技术—核技术及应用]