利用驻极体提高测氡灵敏度的研究

铀矿井、某些非铀矿井和室内外的氡监测以及铀尾矿堆和建筑材料氡析出率的测量,是职业和环境辐射卫生评价的重要内容。利用驻极体在被动采样小室内产生收集氡子体的静电场,极大地提高了氡监测的灵敏度,测氡暴露量的探测下限为6.4Bq/m~3·h~(-1),采样周期为2d时,测氡浓度的探测下限为0.13Bq/m~3,采样周期为1h时测氡析出率的探测下限为0.55mBq/m~2·s。

A Study of High Sensitive Radon Monitoring Method Using Electret

To monitor radon concentration in mines and environment, and radon emanation rate in building materials and uranium mill tailings piles is very important for occupational and environmental radiation risk assessment.The electret was used to produce electrostatic field in the sampling chamber, and a high sensitivity for radon monitoring, was obtained. The lowest detection'limit for radon exposure,radon concentration (in two days sampling period) and radon emanation rate (in one hour period) is 6.4 Bq.m-s'h, 0.13Bq-m'sand 0.55mBq- nT^s'1 respectively.