【摘要】 联合国原子辐射效应科学委员会 ( UNSCEAR)历次报告中公布的世界各国的室外γ辐射剂量率调查结果 ,平均值发生变化接近或大于 2 0 %的国家或地区约占 1 /4 ,这应引起室外 γ辐射剂量率环境监测工作者的高度重视。本文主要介绍 UNSCEAR历次报告中给出的世界各国的室外 γ辐射剂量率调查结果的变化情况 ,分析了变化的原因 ,并对当前国内室外 γ辐射剂量率的环境监测提出一些应予注意和改进的问题更多还原

【Abstract】 The results of worldwide outdoor γ radiation doserate level investigation, as reported in previous UNSCEAR Reports, indicate that the number of countries or regions whose variations in average values of outdoor γ doserate level are close to, or larger than 20%, amounts to 1/4 of the total. This should be brought to serious attention of environmental radiation workers engaged in outdoor γ radiation doserate monitoring. The present paper describes the variations in, and reasons of, the outdoor γ radiation doserate investigation results reported in the previous UNSCEAR Reports. Some problems in need of attention and improvement are raised in the current environmental monitoring of the outdoor γ radiation doserate in our country.更多还原