中国医学装备2016，Vol.13Issue(1)：67-69,3.DOI:10.3969/J.ISSN.1672-8270.2016.01.021
北京周边地区土壤中天然放射性核素所致γ射线外照射剂量率空间分布
Research on spatial distribution of the gamma dose rate from natural radionuclides in soil in the surrounding areas of Beijing
摘要
Abstract
Objective:To survey the activity concentrations of226Ra,232Th and40K in soil around Beijing, and to estimate gamma dose rate, then to draw the spatial distribution of gamma dose rate.Methods: The activity concentrations of226Ra,232Th and40K in soil samples were measured by HPGeγ spectrometry. The distribution of the gamma dose rate was drawn by ArcGIS software. Results: Four hundred and sixteen soil samples were collected and measured. The value of gamma dose rate was from 26.9 nGy/h to 94.2 nGy/h, with a mean of 62.0 nGy/h. The gamma dose rate of most regions around Beijing was between 50.0~70.0 nGy/h.Conclusion: Using simple and intuitive map to show the spatial distribution of gamma dose rate around Beijing is very important to evaluate and study the change of the regional radioactivity level.关键词
外照射剂量率/空间分布/HPGeγ能谱仪/GIS软件/放射性核素Key words
Soil radioactivity/Spatial distribution/HPGe gamma ray spectrometry/GIS software/Radionuclide分类
医药卫生引用本文复制引用
张庆,姚帅墨,赵烨,张京..北京周边地区土壤中天然放射性核素所致γ射线外照射剂量率空间分布[J].中国医学装备,2016,13(1):67-69,3.基金项目
国家重点基础研究发展计划973项目(2007CB407302)"重点区域水体和土壤环境的复合污染特征" （2007CB407302）
