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中文摘要：
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1750—1950V，1700—2100V。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。
英文摘要：
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.
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