基于两种规格的正比计数器气态氚测量研究  

Measurement of Gaseous Tritium Based on Two Specifications of Proportional Counter

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

机构地区：[1]成都理工大学核技术与自动化工程学院,成都610059 [2]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 [3]西南科技大学,绵阳621010 [4]中国工程物理研究院核物理与化学研究所,绵阳621900

出　　处：《核电子学与探测技术》2013年第2期217-220,226,共5页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(40974065);国家杰出青年科学基金(41025015);四川省青年科技创新研究团队(2011JTD0013)资助

摘　　要：针对气态氚浓度测量,采用自主研制的正比计数器和LND正比计数器,对P10本底、高压坪曲线、不同浓度氚信号获取以及正比计数器对氚的吸附性进行了对比研究。结果表明,自主研制的正比计数器的本底值较LND正比计数器本底略高,两种规格正比计数器的高压坪区分别为1 7501 950 V,17002 100 V。对不同浓度氚样进行测量,通过校正曲线可以将测量值转换为理论活度值,实现对气态氚活度浓度的有效测量。For gaseous tritium concentrations measurement, a comparative study is performed for a self- devel- oped proportional counter and a counter made by LND, regarding the P10 background, high - voltage plateau curve, different concentrations of tritium signal and the residual tritium adsorption in the counter. The results show that the background value of the：self - developed proportional counter is slightly higher than the LND proportional counter, the high - voltage plateau of two specifications proportional counter is 1 750 ～ 1 950 V and 1 700 -2 100 V. Different concentrations of gaseous tritium are measured, through the calibration curve the measured value can be converted to the theory activity value, the self- developed counter can meet the purpose of effective measurement of gaseous tritium.

关 键 词：气态氚 正比计数器 工作电压 氚吸附 

分 类 号：TL811[核科学技术—核技术及应用]