Negative correlation between the number of sunspots and the occurrence of 7Be and 22Na in the surface air and their contribution to radiation doses

  • Drago Brodnik “Jožef Stefan” Institute, Ljubljana, Slovenia
  • Denis Glavič-Cindro “Jožef Stefan” Institute, Ljubljana, Slovenia
  • Matjaž Korun “Jožef Stefan” Institute, Ljubljana, Slovenia
  • Marijan Nečemer “Jožef Stefan” Institute, Ljubljana, Slovenia
  • Petra Maver-Modec Danfoss Trata d.o.o., Danfoss District Energy, Ljubljana, Slovenia
  • Toni Petrovič “Jožef Stefan” Institute, Ljubljana, Slovenia
  • Tim Vidmar Belgian Nuclear Research Centre, Mol, Belgium
  • Branko Vodenik “Jožef Stefan” Institute, Ljubljana, Slovenia
  • Benjamin Zorko “Jožef Stefan” Institute, Ljubljana, Slovenia
Keywords: aerosols, assessed radiation doses, cosmogenic radionuclides, dry deposition, systematic influences, wet deposition

Abstract

This article presents yearly mean concentrations of cosmogenic radionuclides 7Be and 22Na occurring in dry and wet depositions (fallout) and aerosols. Time dependencies negatively correlated with the yearly mean number of sunspots. Activity concentrations of 7Be and 22Na in aerosols in the surface air had a correlation of near-unity. 7Be in aerosols exhibited a smoother time dependence than 22Na, implying that the production of 22Na is more sensitive to the solar activity than the production of 7Be. The effect of the measured doses on the general population through internal and external exposure to radiation from cosmogenic radionuclides was small.

Published
2019-12-05
How to Cite
1.
Brodnik D, Glavič-CindroD, Korun M, Nečemer M, Maver-ModecP, Petrovič T, Vidmar T, Vodenik B, Zorko B. Negative correlation between the number of sunspots and the occurrence of 7Be and 22Na in the surface air and their contribution to radiation doses. Arh Hig Rada Toksikol [Internet]. 2019Dec.5 [cited 2020Dec.4];70(4). Available from: https://arhiv.imi.hr/index.php/arhiv/article/view/1185
Section
Original article