单闪烁室流气静态法准确测量222Rn/220Rn的理论研究

为确保单闪烁室流气静态法准确测量222 Rn/220 Rn浓度，进行了222 Rn、220 Rn刻度系数的理论研究，讨论了采样流率对刻度系数的影响，通过理论公式计算得到了刻度系数的理论值，并与标准刻度后的实验值进行比较。结果表明刻度系数的实验值和理论值是一致的，偏差在5%以内，确保了222 Rn、220 Rn刻度系数实验值的准确性，从而确保单闪烁室流气静态法的可靠性。

A Theoretical Study on Accurate Measurements of Radon/Thoron withGas-through and Static Time-delay Method Using a Single Scintillation Cell

For accurate measurements of radon/thoron concentrations with a gas_through and static time_delay method using a single scintillation cell,a theoretical study of radon/thoron calibration factors was carried out and the influences of sampling flow rate on cali_bration factors were discussed. The theoretical values of calibration factors were calculated by theoretical formulas and compared with the experimental values after standard calibra_tion. The results show that the experimental values are in good agreement with the theoreti_cal values,and the deviations are less than 5%. The accuracy of experimental values of ra_don/thoron calibration factors can be ensured, so as to ensure the reliability of the gas_through and static time_delay method with a single scintillation cell.