基于^(133)Ba估算碘盒中^(131)I探测效率方法研究  

Study on estimation method of ^(131)I detecting efficiency in iodine cartridge based on ^(133)Ba source

作　　者：孟宪芳[1] 殷荫[1] 张龙[1] 曹可 马慧玲[1] 王士军 秦培中[1] MENG Xianfang;YIN Yin;ZHANG Long;CAO Ke;MA Huiling;WANG Shijun;QIN Peizhong(Beijing Research Center for Radiation Applications,Beijing Radiation Materials Key Laboratory, Beijing 100015, China)

机构地区：[1]北京市射线应用研究中心辐射新材料北京市重点实验室,北京100015

出　　处：《核技术》2018年第7期34-38,共5页Nuclear Techniques

基　　金：国家重大科学仪器设备开发专项(No.2011YQ060094)资助~~

摘　　要：基于^(133)Ba与^(131)I具有能量特性相近的γ射线、半衰期较长的特点,探索一种^(133)Ba代替^(131)I通过实验估算碘盒中^(131)I探测效率的简易方法。依据某碘检测仪取样和探测装置进行了实验和探测效率估算,同时在近似实验条件下利用超级蒙特卡罗核模拟软件系统(Super Monte Carlo Program for Nuclear and Radiation Simulation,SuperMC)程序进行了模拟计算,计算的探测效率对于蒙特卡罗(Monte Carlo,MC)模拟结果与实验估算结果在6.0%以内相符,说明这种简易实验方法可以用来估算碘盒中^(131)I探测效率。[Background] Environment gaseous radioactive iodine monitoring is important for nuclear power plant safety. 131 I detection efficiency is an important parameter for environment gaseous radioactive 131I monitoring equipment. [Purpose] The aim is to explore an easy and simple approach which can estimate 131I detecting efficiency in iodine sampling cartridge based on 133Ba source. 133Ba has γ rays of similar energy characteristics as 131I and has long half-life. [Methods] According to some iodine detector sampling and detecting device, some work have been carried out including experiments and detection efficiency estimation and simulated calculation with Super MC program under conditions similar to experiment. [Results] Detection efficiency experimental estimation results consistent with Monte Carlo（MC） simulation results within 6.0%. [Conclusion] The study suggests that the simple experimental method can be used to estimate the iodine sampling cartridge 131I detection efficiency.

关 键 词：^131I取样盒 探测效率 ^133Ba点源 SuperMC程序 

分 类 号：TL816.3[核科学技术—核技术及应用]