核农学报2011，Vol.25Issue(4)：773-778,6.
青岛地区地表天然放射性调查
INVESTIGATION AND ASSESSMENT OF NATURAL RADIOACTIVITY OF GROUND SURFACE IN QINGDAO AREA
摘要
Abstract
This work deals with the extensive determination of natural radioactivities of the ground surface in Qingdao area by using gammaspectrometer.Its influence factors were discussed.The activity concentrations for 238U,232Th and 40K obtained were 112（from 40.2 to 442）,71.5（from 32.6 to 88.1）,and 672（from 442 to 913） Bq/kg,respectively.Compared with the average values of countrywide and worldwide,the activity concentrations of 232Th and 40K in Qingdao area were obviously higher.To assess the radiological hazard of the natural radioactivity in soil,the absorbed dose rate,annual effective dose rate and external hazard index were calculated.The results indicate that there is a normal level of natural radioactivity of soil in Qingdao area.关键词
地表/天然放射性核素/天然放射性水平/辐射Key words
ground surface/natural radionuclide/influence factors/radioactive level分类
环境科学引用本文复制引用
徐磊,夏宁,姜学钧..青岛地区地表天然放射性调查[J].核农学报,2011,25(4):773-778,6.基金项目
中国地质调查局地调项目 （）
