应用Thomas-Tsivoglov法在野外测定氡子体浓度很不方便,因计数时间不规则,需要手工去控制定标器,因而可能产生误差,并使整组数据无效。30分钟的计数周期使操作效率限制在一小时内只能处理二个样品,因此,如要测定氡子体浓度的快速变化,至少要使用二台定标器。在我们的“补救措施纲要”(Remedial Acti-on program)中,经常要测定房子内空气中各个氡子体的浓度,因而制订了一种改进的三段计数程序,它使用标准定标时间(standard scaler timers), Using the Thomas-Tsivoglov method to measure concentrations of radon progeny in the field is inconvenient. Erratic counting time requires manual control of the scaler, which can create errors and invalidate the entire set of data. A 30-minute counting cycle limits operational efficiency to handling only two samples in an hour, so a minimum of two scalars are required to determine rapid changes in radon progeny concentrations. In our Remedial Acti-on program, which often determines the concentrations of individual radon progenitors in the air of an apartment, an improved three-stage counting procedure has been developed that uses standard calibration times standard scaler timers),