Abstract
Here we present time variations data of radon emanations in the surface layer of the atmosphere,measured from January 2016 to June 2018. By means of spectral analysis method, we have analyzed timevariations and showed the presence of existing natural variations, mechanisms of which were describedby the authors in previous works. Authors measured the activity of natural beta-active radionuclides ofradon’s daughter decay products (DDP) in the surface layer of the atmosphere. The measurements wereperformed with a beta-spectrometer “Progress” scintillation detector, which is located on the third floor ofthe Faculty of Physics and Technology at al-Farabi Kazakh National University (KazNU). Measurementsof beta spectra were carried out with an exposure of at least for 2000 seconds and during the day up to 10beta spectra were recorded. The built up time dependence of the integral values of the spectra shows thatseasonal variations of natural beta-active radionuclides are manifested on the background of diurnalfluctuations. Thus, 1 day, 4 day, 7 day, 16 day and 30 day variations were found.