大连地区天然环境电离辐射水平调查与评价

在开展城市地质工作中、我队于1986年起对大连地区1632km2的面积开展了地面放射性测量,在此基础上对γ辐射水平作了信息转换,从而扩大了以往仅应用于地质工作中的放射性γ测量的服务领域,提高了放射性测量的应用效果.本文详细介绍了大连地区天然环境γ辐射水平及其空气吸收剂量的分布特征.编制了《大连地区天然环境电离辐射照射量率分区图》和《大连地区天然环境电离辐射空气吸收剂量率分布图》.该项工作的完成,为大连市提供了环境放射性背景资料,为物化探工作服务于城市环境迈出了可喜的一步.

INVESTIGATION AND ASSESSMENT OF NATURAL ENVIRONMENT IONIZING RADIATION LEVELOF DALIAN AREA

For the purpose of extending the urban geological work, our party has conducted since 1986 ground radiometric measurement over an area of 1632 km² in Dalian and, on such a basis, made information conversion for gamma radiation level, thus extending the service of radiometric measurement which was formerly only used in geological work, and raising the effectiveness of ra-diometric measurement.This paper describes in detail the natural environment gamma radiation level of Dalian area and distribution of air-absorbed doses. Two maps, namely. the division of natural eivironment ionizing radiation ra tes in Dalian area and the distribution of air-absorbed doses of natural envi ronment ionizing radiation, have bean compiled.The completion of this work has provided environmental radiogenic ba ckground data for Dalian City and made a gratifying stride in applying geo physical and geochemical prospecting to the study of urban environment.