摘要
描述了220Rn室的结构.探讨了用延时法调节220Rn浓度的方法.该方法可有效的调节箱体中220Rn浓度.用檀香燃烧的烟气作为气溶胶注入箱体中,测量了箱体中ThB(212Pb)浓度和气溶胶的关系.箱体中的气溶胶粒子浓度需大于104P/m3以上才能有效建立箱体中的ThB浓度.烟气气溶胶会堵塞气路,污染探测元件,有待以后研究改进.
The structure of ^220Rn chamber is described. The method of time - delay for control ^220Rn concentration in the box is determined. The method can control the concentration of ^220Rn effectively. The smoke of sandalwood is filled into the chamber as aerosol. The relation between the concentration of ^212pb and aerosol is measured. In order to accumulate ^212pb concentration in the box, the aerosol concentration must be more than 10^4 P/m^3. It needs to improve, because the fume can plug gas circuit and contaminate the detective elements.
出处
《南华大学学报（自然科学版）》
2007年第2期16-19,共4页
Journal of University of South China：Science and Technology
基金
湖南省科技厅重点资助项目(05FJ2003)
