期刊论文

中文

核电子学与探测技术

0258-0934

2014

34

8

958-962

10.3969/j.issn.0258-0934.2014.08.010

国家自然科学基金（11075070,11375083）； 国家博导基金项目（20114324110003）；

本校为第一机构

利用大流量撞击式分级采样器、放化分离提纯技术和 α 谱仪测量技术,建立了针对大气颗粒物中~(210)Po 的活度及活度 - 粒径分布的测量方法,并应用该方法分别于春季和秋季对衡阳市城区大气颗粒物中~(210)Po 的活度及活度 - 粒径分布进行了测量。实验测量结果表明,衡阳市城区大气颗粒物中~(210)Po 的含量处于正常水平;总体积比活度和质量比活度的分布范围分别为:0. 012 5 mBq · m~(-3) ~ 1. 165 8 mBq·m~(-3)、0. 459 7 Bq·g~(-1) ~ 13. 859 8 Bq·g~(-1),体积比活度含量占 TSP 中总含量93% 的~(210)Po 存在于粒径范围小于3. 0 μm(PM_(3.0))的颗粒物中;雾霾天气会提高公众所接受的天然内照射剂...

Using high volume cascade impactor, radiochemical purification technique and alpha-spectrometer measurement technology, the method was built for measuring 210Po activity and the activity-particle size distribution in atmospheric particulate. 210Po activity and activity-particle size distribution in the atmospheric particulate of Hengyang city was be measured by this method during the spring and autumn. Results of the measurement show that, the level of 210Po is normal in the atmospheric particulate of Hengyang city, as volume specific activity ...