^(222)Rn/^(220)Rn子体连续测量仪研制  

Development of a ^(222)Rn/^(220)Rn Progeny Continuous measuring instrument

作　　者：吴喜军[1,2] 李志强[1] 单健[1] 周青芝[1] 

机构地区：[1]南华大学核科学技术学院,湖南衡阳421001 [2]南华大学数理学院,湖南衡阳421001

出　　处：《核电子学与探测技术》2017年第3期289-294,共6页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(11475082)资助

摘　　要：实验研制了基于α能谱法的^(222)Rn/^(220)Rn子体连续测量仪。该仪器采用微孔滤膜采样,采用PIPS探测器与α能谱测量技术实现^(222)Rn、^(220)Rn子体的α粒子计数与测量。实验测试表明:在不更换滤膜的前提下,可实现^(222)Rn/^(220)Rn子体的活度浓度及潜能的有限次连续测量;测^(222)Rn、^(220)Rn子体活度浓度的下限为10 Bq/m^3,^(222)Rn子体活度浓度为100 Bq/m^3时的测量合成不确定度优于10%。Based on the continuous measurement method of 220Rn progeny concentration, the 222Rn/220Rn Progeny Continuous measuring instrument has been developed by using microfihration membrane to collect progenies, applying PIPS detector and measurement technology of α spectrum to count alpha particles. The experimental tests show that the instrument could continuously measure activity concentration and potential energy of 222Rn/220Rn progeny without replacing filter membrane frequently. The detection lower limit of measuring 222Rn,220Rn progeny＇s activity concentration were about 10 Bq/m3. When the progeny lever was larger than 100 Bq/m3 ,the uncertainty was less than 10%.

关 键 词：222Rn/220Rn子体 累积活度函数 连续测量 α能谱法 

分 类 号：TL72[核科学技术—辐射防护及环境保护] TP202[自动化与计算机技术—检测技术与自动化装置]