基于单小闪烁室延时法绝对测量^(222)Rn/^(220)Rn方案验证

Research on Absolute Mensurement of ^(222)Rn\^(220)Rn Concentrations Based on a Single Small Scintillation Cell and Delay-time Method

文章提出了单小闪烁室采用延时法对222Rn/220Rn进行绝对测量的方案,并给出了使用222Rn对这种方案进行验证的条件,设计了验证实验。实验结果表明,延时后小闪烁室的浓度与球形闪烁室作为参考值的偏差在-2.9%^+3.4%之间。从小闪烁室的浓度随时间的波动来看,延时后最佳测量氡的时间段是10~45分钟。实验证明采用单小闪烁室延时法对222Rn/220Rn浓度进行绝对测量是可行的。

A single small scintillation with delay-time method is used to measure radon and thoron concentrations in their mixed atmosphere-of absolute measurement of radon and thoron concentrations was discussed. The conditions of using radon to test this menthod was described and a experiment was designed to prove it. Compare to the reference number, Its margin of error was -2. 9%- ＋3. 4%, and the best time of the measurement of radon was 10-45 minutes. In conclusion, a single small scintillation cell could be used for absolute measurement radon and thoron concentrations.