中文摘要：

针对闪烁室测氡仪在多种采样方式的刻度系数,以FD125氡钍分析仪为实验仪器,分别对真空法、循环法和连续监测法等3种采样方式得到的刻度系数进行对比研究。结果表明,不区分采样方式使用同一刻度系数会引入较大的测量误差。通过对比分析3种采样方式的效率因子,得出循环采样法采样时间为10 min的采样效率最高,真空采样法的效率最低,而且循环采样法其采样时间越长,采样效率越高,但循环采样时间过长会影响氡与其子体的平衡,降低效率因子。

英文摘要：

In order to research the calibration coefficients of scintillation chamber emanometer in multiple sampling methods,FD125 radon-thoron analysis instrument is used.The calibration coefficient values which are obtained from vacuum method,circulation method and continuous monitoring method are compared.The results show that the large measurement error would be caused by using uniform coefficient without distinguishing sampling methods.According to the comparison and analysis of the efficient factors of three sampling methods,conclusions can be found that the sampling efficiency of circulation method with 10-minutes sampling time is the highest and the efficiency of vacuum method is the lowest.Moreover,the more time circulation method uses,the more efficient sampling efficiency is.However,the circulation sampling time cannot be too long,for it would affect equilibrium of radon and its progeny and reduce efficiency factors.