Natural Radioactivity Levels in the Pearl River Delta Economic Zone of Guangdong, China
The paper presents the preliminary results of natural radiation measurements in high radiation background areas of the Pearl River Delta Economic Zone (PRDEZ) in Guangdong, China. The results indicated that outdoor absorbed dose rate from cosmic radiation range is 55.7—88.7 nGy/h, and the average is 68.2 nGy/h. Outdoor absorbed dose rate from terrestrial gamma radiation range is 22.6—522 nGy/h, and the average is 137 nGy/h in PRDEZ. The highest absorbed dose rate—522 nGy/h is found in Conghua. Average indoor and outdoor radon level in PRDEZ is 30.5 and 11.2 Bq/m3. Average radon content in water—tap water in 12 cities is 6.2 Bq/L; hot spring water is 120.6 Bq/L. Radon content in soil range is 35820—817180 Bq/m3, and the average is 20146 Bq/m3. Average radionuclide contents of 238U, 226Ra, 232Th and 40K in PRDEZ soil are 137.6, 136.7, 175.3 and 700.7Bq/kg, respectively. Zhongshan and Taishan County have the highest average 232Th contents in soil.
Natural radioactivity Gamma radiation Terrestrial radiation Radionuclide Radon level
Gang SONG Zeping TANG Yumei YUE Diyun CHEN
A129,No.230,Waihuanxilu,Guangzhou Higher Education Mega Center,Guangzhou 510006,China School of Environmental Science and Engineering,Guangzhou University Guangzhou 510006,China
国际会议
北京
英文
1-3
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）