中文摘要：

介绍了闪烁室法测量^220Rn室中^222Rn／^220Rn混合浓度的基本原理和测量程序，提出了测量中两种计算方法：测量结果平行计算法和消除^220Rn子体对测氡干扰的算法。在^220Rn室中使用单闪烁室法分别在10、15、20min三个不同的静态时间下工作，同时利用RAD7测氡仪进行平行测量，最后将测量结果和RAD7测氡仪的测量结果进行比较。实验结果表明：单闪烁室法是可靠的，能够满足准确、快速测量的要求，并且静态时间为10min时用平行算法得到的结果更合理。

英文摘要：

A method is introduced which had been used to measure radon and thoron concentration in thoron chamber by a scintillation cell, and gave two calculation methods which include a parallel arithmetic of concentration of ^222Rn and ^220 Rn and other arithmetic of Eliminating interference of ^220Rn progeny to radon. Radon and thoron were measured in three different static time of 10,15,20 minutes respectively by a scintillation cell method and measured by RAD7 simultaneously. Measurement data of tow method were compared and analyzed. The results show a scintillation cell method is reliable and able to be used for rapid and accurate measurement, besides selecting static time 10 minutes and using parallel arithmmetic is more reasonable, the measurement results are more reasonable than other situation.