Diurnal variations of radon and thoron decay product concentrations in the surface layer of the atmosphere and their washout by precipitations

Abstract

Data on diurnal variations of radon and thoron decay product concentrations in the surface layer of the atmosphere in the Moscow region are given. It is noted that the maximum of radon exhalation from the soil occurred at night. (Measurements were carried out in summer in dry weather.) The strongest upset of radioactive equilibrium between radon daughter products was observed in the first half of night and in the day-time.DOI: 10.1111/j.2153-3490.1966.tb00281.x