根据加电场测氡理,利用(气土)产生的初始游离态ThA具有正电荷、能在电场作用下收集的特性,使用FDC-80加电场测氡仪,测定(气土)浓度。对方法的理论计算公式和使用条件进行了一些探讨;并与静电计和气球法测(气土)方法作了对比实验,表明该方法在快速和精确度上较上述方法有着优点。若对装置进一步改进,灵敏度可高于上述方法。 According to the measurement of radon in the electric field, the initial free-state ThA generated by (soil-earth) has a positive charge and can be collected under the action of an electric field. The concentration of soil (earth) is measured by using the FDC-80 plus electric field radon detector. The theoretical calculation formulas and operating conditions of the method were discussed. Compared with the methods of electrometer and balloon method (soil and earth), the experimental results show that the method is superior to the above method in terms of speed and accuracy. If the device is further improved, the sensitivity can be higher than the above method.