【摘要】 目的 了解珠海市室内外空气中222Rn、220Rn及其子体浓度及由此而对居民所产生的有效剂量。方法采用固体径迹探测器测量222Rn、220Rn浓度,采用α潜能法测量222Rn、220Rn子体浓度。结果 珠海市室内外222Rn及其子体的浓度分别为室内60.4 Bq·m-3、35.4 EEC Bq·m-3和室外23.4 Bq·m-3、12.3 EEC Bq·m-3。室内外220Rn子体浓度分别为2.7和0.8 EEC Bq·m-3。222Rn、220Rn及其子体所致居民年有效剂量分别为1.62和0.61mSv。结论 珠海市室内外222Rn、220Rn浓度高于世界均值,其原因与珠海地区土壤和岩石中天然放射性核素背景有关。更多还原

【Abstract】 Objective To detect 222Rn,220 Rn and their progenies concentrations, and the annual effective dose causes to residents in Zhuhai area.Methods 222Rn and 220Rn concentrations were obtained by using Rn - Tn solid state nuclear track detectors.The potential energy analysis method was used to detect their progeny concentrations. Results 222Rn and its progeny concentration in Zhuhai are 60.4Bq·m-3, 35.4 EEC Bq·m-3 (indoor), and 23.4 Bq·m-3, 12.3 EEC Bq·m-3 (outdoor), respectively.220 progeny concentrations in indoors and outdoors are 2.7 and 0.8 EEC Bq·m-3, respectively.The annual effective doses from 222Rn and 220Rn progenies are 1.62 and 0.61mSv, respectively. Conclusions 222Rn and 220Rn concentrations indoor and outdoors in Zhuhai are high than the average level of the world. It probably correlated with a higher natural radionuclides content in sois and rock of this area.更多还原