Periodic variations in time of atmospheric alpha and beta radioactive nanoparticles

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 time
variations and showed the presence of existing natural variations, mechanisms of which were described
by the authors in previous works. Authors measured the activity of natural beta-active radionuclides of
radon’s daughter decay products (DDP) in the surface layer of the atmosphere. The measurements were
performed with a beta-spectrometer “Progress” scintillation detector, which is located on the third floor of
the Faculty of Physics and Technology at al-Farabi Kazakh National University (KazNU). Measurements
of beta spectra were carried out with an exposure of at least for 2000 seconds and during the day up to 10
beta spectra were recorded. The built up time dependence of the integral values of the spectra shows that
seasonal variations of natural beta-active radionuclides are manifested on the background of diurnal
fluctuations. Thus, 1 day, 4 day, 7 day, 16 day and 30 day variations were found.