一种低浓度气态氚测量仪的研制  

A Gaseous Tritium Measuring Instrument of Low Concentration

作　　者：曾俊辉[1] 连晓雯[2] 庹先国[3,4] 孙耀中[1] 宋茜茜[2] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900 [2]成都理工大学核技术与自动化工程学院,成都610059 [3]西南科技大学核废物与环境安全国防重点学科实验室,绵阳621010 [4]西南科技大学,绵阳621010

出　　处：《核电子学与探测技术》2012年第12期1421-1424,共4页Nuclear Electronics & Detection Technology

基　　金：国家十一五核设施退役技术研究专项资助

摘　　要：针对环境空气中气态氚浓度测量的难点,基于正比计数器原理,自行研制出了一套低本底气态氚测量仪。测氚仪中配有4根不同体积的正比计数器,将待测气体与工作气体充入已抽成真空的正比计数器中,采用能谱测量的方法对被测气体进行分析,氚的连续能量谱线与理论能谱相吻合,同时讨论了不同浓度的气态氚样的测量结果与样品含量的关系。研究结果表明,整套仪器稳定性良好,能实现对低浓度气态氚样的有效、直接测量。Aimed at the difficulties of gaseous tritium concentration measurement in ambient air, based on the theory of proportional counter, made a self - developed gaseous tritium measuring instrument with low back- ground. This set of instrument provided with four different volume proportional counters ,filled the test gas and working gas with proportional counter , using the ray spectrometry method for analysis of the measured gas, and the continuous energy spectrum with the theoretical energy spectrum of tritium is consistent. Discussed different concentrations of gaseous tritium samples, the relationship between the measurements and the sample contents. The results show that the set of instrument have a good stability, it can achieve effectively and directly measure to low concentrations of gaseous tritium samples.

关 键 词：气态氚浓度 正比计数器 线性关系 

分 类 号：TL811[核科学技术—核技术及应用]