中文摘要：

为了解不同地质背景条件室内氡浓度水平,采用脉冲电离室测氡仪AlphaGUARD测量了北京广东不同地质背景典型测点的室内氡浓度,同时对广东某一测点进行了长期的室内氡监测。测量和研究结果表明：地表岩性是影响室内氡浓度高低的重要因素之一。地处花岗岩地区的建筑物内氡浓度高于其他岩性地区的室内氡浓度,广东室内氡水平明显高于北京地区,广东北京花岗岩地区的平均室内氡浓度分别为69.98 Bq/m^3和43.97 Bq/m^3,第四系覆盖地区的平均室内氡浓度分别为43.60 Bq/m^3和35.74 Bq/m^3。民用住宅卧室内的室内氡浓度略高于公共建筑物办公室内的室内氡浓度。因此,结合地质背景研究室内氡的水平与分布对指导开展室内氡调查中确定抽样方案、选择测点及进行区域尺度室内氡评价有重要的实用价值。

英文摘要：

For the purpose of studying the indoor radon level under different geological backgrounds,the authors measured indoor radon concentrations by pulse chamber radon monitor AlphaGUARD in some typical areas of Guangdong and Beijing,and also made long-term monitoring of indoor radon concentrations at a measuring site in Guangdong.The results show that surface lithology is one of the most important factors affecting indoor radon.The indoor radon in the granite area is higher than that in other lithologic areas,and the level of indoor radon in Guangdong is apparently higher than that in Beijing.The average concentrations of indoor radon in Guangdong and Beijing are respectively 69.98 Bq/m^3 and 43.97 Bq/m^3 for granite area,and 43.60 Bq/m^3,35.74 Bq/m^3 for Quaternary area.The level of indoor radon in the residence is slightly higher than that in office buildings and restaurants.The study of the distribution and level of indoor radon in combination with geological background is of guiding significance for the selection of the indoor radon survey points and also has important practical value for regional scale indoor radon evaluation.