我国主要城市空气中^(210)Po、^(210)Pb活度浓度分布初步分析

Preliminary analysis of activity concentration distributions of airborne ^(210)Po and ^(210)Pb in major cities in China

^(210)Po、^(210)Pb是天然放射性核素,是天然照射的重要来源。空气中的^(210)Po、^(210)Pb主要附着在颗粒物上。本工作通过对我国环境气溶胶中^(210)Po、^(210)Pb取样测量,对我国空气中^(210)Po、^(210)Pb浓度水平做了初步的分析。我国环境气溶胶中^(210)Po、^(210)Pb的浓度水平普遍高于国外水平。

As natural radionuclides, ^（210） Po and ^（210） Pb are important sources for natural exposure,generally being attached to the particulates in air. In order to analyze the activity concentration distribution of airborne ^（210） Po and ^（210） Pb in China, environmental aerosols were sampled and assayed. The results showed that the activity concentrations of airborne ^（210） Po and ^（210） Pb in China were generally higher than those in other countries.