空气中氡甄别型氚监测仪的研制

Development of tritium monitor with radon compensation

介绍了一种可甄别空气中惰性气体氡的高灵敏度氚实时连续监测仪,其一体化的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,实现了空气中氚监测过程中氡干扰的实时、同步测量与补偿。该氡甄别型氚监测仪不仅在一般使用环境条件下减少了环境氡的影响,提高了氚监铡仪的探测灵敏度,而且可在氡浓度比环境高100倍的场所探测到100Bq/L的氚浓度。对于监测环境中其他β放射性惰性气体,这种新型的氚监测仪预期将会有更好的甄别补偿性能。

This paper describes a real-time tritium monitor with inert gas radon compensation, in the center of it's flow gas cell detector is a plate-out chamber monitoring tritium, facing towards to which in the upside and downside sides of the flow gas cell are a couple of seal plate chamber monitoring radon with window of polyester aluminized membrane with quality thickness of 0. 83mg/cm2 foil, so that radon interfere can be synchronously monitored and compensated in monitoring tritium in air. The tritium monitor not only would improve the tritium-detectable sensitivity, reducing the radon inferences in general environment, but also detect tritium concentrations of 100Bq/L in which the radon concentration is higher 100 time than that in the general environment for the other inert radioactive gas eradiating βradiation, it will be better compensated.