| 北京环境辐射水平现状与分布 |
| 摘要点击 2145 全文点击 1568 投稿时间：1993-04-10 |
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| 中文关键词 环境辐射水平 剂量率 北京 |
| 英文关键词 environmental radiation level dose rate Beijing |
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| 中文摘要 |
| 在北京市按网格布点调研了环境辐射水平.北京原野γ辐射及宇宙射线室外剂量率按网点加权均值分别为56.2及32.3nGy·h-1,全市土壤中238U、232Th、226Ra、40K及137Cs含量按面积加权均值分别为19.4、34.1、21.4、622及8.3Bq·kg-1,各类水体水中U、Th及226Ra、40K浓度范围分别是0.12-8.94、0.02-0.66μg·L-1及6.0-98.1、19.2-643 mBq·L-1.北京环境辐射水平地理分布的大致趋势是西北部山区较高,东南部平原区较低. |
| 英文摘要 |
| This paper reports the environmental radiation level in Beijing.The monitoring sites were set up by net-grid method.In Beijing the grid point-weighted average values for γ radiation dose and cosmic ray outdoors radiation dose are 56.2 and 32.3 nGy/h, respectively.The area-weighted average values of U-238, Th-232,Ra-226, K-40 and Cs-137 in soil are 19.4、34.1、21.4.662 and 8.3 Bq/kg, respectively.The concentration range of U、Th and Ra-226, K-40 in various waters are 0.12-8.94、0.02-0.66μg/L and 6.0-98.1、19.2-643 mBq/L, respectively.The geographical distribution of the environmental radiation levels is higher in the west-north mountain area and lower in the east-south plain of Beijing. |
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