中文摘要：

目的对现行常用的三种测氡仪（FD3017测氡仪,RAD7测氡仪和Alpha GUARD测氡仪）的性能进行实验研究。方法选择一个普通氡室和土壤高氡浓度的地区进行氡含量的实地测量。结果三台测氡仪在低氡转向高氡环境后测量结果仅受装置内残存氡的影响。三者在高氡转向低氡环境后测量结果除受上述影响外,RAD7测氡仪还受到探测器上已大量积累的氡短寿命子体浓度的影响,同时受到钍射气短寿命子体的影响;Alpha GUARD测氡仪在高氡浓度转向低氡浓度过程中,高氡浓度值越高,设备示值越偏离真实值甚至发生崩溃。结论在氡浓度急剧变化的条件下,FD3017具有较高的稳定性,而另外两仪器都会出现不同程度的影响。

英文摘要：

Objective To compare the performance and measurement results of three types of radon measuring instruments FD3017,RAD7 and Alpha GUARD which are commonly used for field radon measurement.Methods A common radon room and abasement with high radon soil were selected for field measurement of the radon gas and comparison.Results The measurement results of the three radon monitor are only affected by radon which remains in the device after measuring radon in the low to high radon environmental.Besides,RAD7 radon monitor is also influenced by the concentration of short-lived radon progeny which has accumulated in the detector,and also,affected by the short-lived daughters of Th.In＂high to low＂radon concentration process of the Alpha GUARD radon monitor,the higher the radon concentration,the farther deviate from the true value for the device indication or even to be collapsed.Conclusion Under the condition of rapid changes in radon concentration,FD3017 has higher stability,and others suffered different degree influences.