大气氡变化对航空伽马能谱测量的影响

The influence of the radon on the airborne gamma-ray spectrometry survey

笔者针对大气氡干扰伽马能谱测量的问题,研究了大气氡在气象变化时的规律,认为大气氡浓度变化易受气象因素控制,并对航空伽马能谱测量的总道和铀道产生较大的影响,根据下雨后3 h氡浓度逐渐趋于稳定的实验结果,在野外实际工作中,提出在一定气象条件下,其对航空伽马能谱测量的影响大小及需要采取的应对措施。

To tackle the influence of the radon on the airborne gamma-ray spectrometry survey,the authors studied the law of atmospheric radon during the climatic change,and detected that the atmospheric radon change is easily controlled by the meteorological factors,and has great influence on Tc and uranium channel in the aviation gamma spectrum measurement. In consideration of the fact that the radon will be slowly stabilized three hours after the rain,the authors put forward the regularity of the influence of radon on the airborne gamma-ray spectrometry and the measures that should be taken in practical work.