珠海市大气环境中氡浓度的测定

采用固体径迹探测器累积氡测定方法对珠海市不同地质背景、不同的建筑风格的房室内室、外地面水平氡浓度进行了测定。结果表明，珠海市室内、外空气中氡浓度的平均值分别为：１６４。２Ｂｑ／ｍ＾３和７５．２Ｂｑ／ｍ＾３，居全国各大城市之首，仅次于我国的个旧地区，但大多数住房室内氡浓度都低２００Ｂｑ／ｍ＾３。研究发现秋冬季的室外氡浓度高于春夏季的室外氡浓度。而室内氡浓度的浓度的变化情况则相反，春夏季高于秋冬季，室

Determination of Radon Concentrations of Atmosphere in Zhuhai City, Guangdong Province

Solid state alpha track detectors were used to measure indoor and outdoor radon concentrations in different geological background,different seasons,layers of different altitudes and different built style in Zhuhai city.Mean indoor and outdoor radon concentrations are 164.2 Bq/m 3 and 75.2 Bq/m 3 respectively,which are the highest in all big city in China,only next to Gejiu area.The indoor radon concentrations in the most of buildings are lower than limited datum(200 Bq/m 3).Outdoor radon concentrations are higher in autumn and winter than in spring and summer,but indoor radon concentrations are higher in spring and summer than in autumn and winter.With raising of altitude of layer,the indoor air radon will decrease.The radon in groundwater is high,and the room with high indoor radon are using groundwater or set in fracture belts.