抗环境氡干扰测氚电离室的研制

为提高电离室测量环境中氚的探测灵敏度,研制了一种可甄别空气中氡的测氚电离室。该电离室采用平行板型丝壁测氚电离室和镀铝聚酯膜窗平行板型测氡密闭电离室组成,具有较强的甄别环境氡的能力,适用于氡浓度较高的环境中氚的监测。实验结果表明:该测氚电离室对氚的响应线性相关系数为96.54%;在氡环境中,对氡的甄别补偿为98.83%;测量值与约定值的相对误差不大于40%。

Development of Measuring Tritium Ionization Chamber to Resist Interference of Environmental Radon

To increase the detection sensitivity of the ionization chamber in measuring environment tritium, a kind of measuring tritium ionization chamber is developed which can identify radon in the air. The ionization chamber adopts parallel plate type wire plane measuring tritium ionization chamber and parallel plate aluminum airtight chamber with plating polyester film window to measure radon. This design has strong ability to identify environmental radon, can monitor tritium in the high radon concentration environment. The experimental results show that the measuring tritium ionization chamber for tritium response of the linear correlation coefficient is 96. 54%;In the radon environment, screening of radon compensation is 98. 83%;The relative error of meas-ured values and the agreed value is not greater than 40%.