中文摘要：

目的：了解南通市城区土壤中氡浓度分布状况。方法：采用测氡仪检测土壤氡浓度,在测量区域内按1km×1km网格状十字形布置测点,测点深度为600~800 mm,采样孔径为20 mm,绘制南通市城区土壤氡浓度分布图。结果：南通主城区土壤中氡浓度平均值为14 885 Bq/m3,最高为38 000 Bq/m3,最低为2 800 Bq/m3,69.9%浓度范围在6 000~20 000 Bq/m3。结论：南通市城区某些地点土壤氡浓度处于比较高的水平,进行区域性的土壤氡浓度普查及大型公共建筑室内氡污染状况调查已是当务之急。

英文摘要：

Objective： To investigate the concentration distributions of soil radon in Nantong city.Methods： The sample points were set in the cross intersections of each 1km×1km area in the inspection region.The depth and width for sampling were 600-800 mm and 20 mm,respectively.The concentrations of radon in soil were detected by RAD-7 Electronic Radon Detector.A map of radon distribution was drawn according to the detection results.Results： The averaged,highest and lowest concentrations of soil radon in Nantong city were 14885,38000,and 2800 Bq/m3,respectively.Most of the concentrations（69.9%） ranged from 6000 to 20000 Bq/m3.Conclusion： The concentrations of soil radon were at a relatively higher level in some sample points in Nantong city.Therefore,complete investigations of regional radon distribution and radon pollution in public buildings are in urgent need.