液闪法与γ谱法测量气溶胶中^(210)Pb方法比较

Comparison of ^(210)Pb Concentrations in Aerosols by Liquid-Flashover and γ Spectrum

目前^(210)Pb测量以γ谱法为主,方法存在干扰核素多、探测限较高的问题,本实验探索液闪法测量^(210)Pb,主要是通过低本底液闪测量^(210)Bi活度推算出^(210)Pb,活度.通过直接法和间接法测量气溶胶^(210)Pb活度.两种方法测量结果比较得出能谱法和液闪法的差异,最终探索出一种测量大气中^(210)Pb活度新方法。

At present,the^(210)Pb measurement is mainly made by spectrum method,which has the problems of more interfering nuclides and higher detection limit,in this experiment,the liquid scintillation method was used to measure^(210)Pb activity,which was calculated by calculating^(210)Pb activity by liquid scintillation measurement at low background,The activity of^(210)Pb in aerosol was measured by direct method and indirect method,and the difference between energy spectrum method and liquid flash method was obtained by comparing the measurement results of the two methods,Finally,a new method to measure the activity of^(210)Pb in atmosphere was explored.