HPGe测量气体裂变产物中微量^(123)Xe的理论模拟  

The Theoretical Simulation of the Trace ^(123)Xe Measurement in the Gaseous Fission Products by HPGe

作　　者：倪建忠[1] 刘杰[1] 张佳媚[1] 解峰[1] 师全林[1] 余功硕[1] 

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《核电子学与探测技术》2010年第9期1191-1195,共5页Nuclear Electronics & Detection Technology

摘　　要：利用MCNP模拟计算了大量气体裂变产物中微量123Xe的HPGeγ能谱,分析了气体裂变产物对123Xe测量的影响,结果表明:直接测量气体样品中的123Xe是不可能的,但可以通过测量其子体123I来推算123Xe,推荐的测量方法是:对原始气体样品不做Kr/Xe分离,衰变6.59 h后,将气体去除,再衰变2 h后,采用HPGe测量123I。The influence of gaseous fission products on the trace 123Xe measurement by HPGe was analyzed by applying MCNP.The results indicate that the direct measurement of 123Xe in the gaseous sample is impossible.123I,the daughter of 123Xe,can be determined by HPGe,the proposed method is： first,the sample decays for 6.59 hours without Kr/Xe separation;then the gases are separated from the sample;next,the sample decays for 2 hours;finally,123I in the sample can be measured by HPGe.

关 键 词：123Xe 气体裂变产物 HPGE MCNP 

分 类 号：TL817.2[核科学技术—核技术及应用]