Concentration measurements of 7Be at ground level air at Palermo, Italy-comparison with solar activity over a period of 21 years

J Environ Radioact. 2004;72(3):259-71. doi: 10.1016/S0265-931X(03)00177-2.


Air activity concentrations of (7)Be in Palermo determined for the period January 1995-December 2002 by gamma-ray spectrometric analysis of particulate samples collected on paper filter by a high-volume sampler (approximately 900 m(3) h(-1)) are reported. The temporal behaviour of (7)Be concentration presents the same characteristics already observed in the measurements carried out over the previous 13-year (1982-1994) investigated period. The mean value of 5.06 mBq m(-3) obtained from the analysis of the 4636 particulate samples collected from 1982 to 2002 can be considered a representative value of (7)Be air concentration at ground level in our geographical zone. The comparison of long-term variation in the (7)Be concentrations with the cyclic solar activity-extended to the whole period of 21 years-confirms the inverse correlation between the two quantities.

Publication types

  • Comparative Study
  • Historical Article

MeSH terms

  • Beryllium / analysis*
  • Cosmic Radiation*
  • Environmental Monitoring / history
  • History, 20th Century
  • Italy
  • Radioisotopes / analysis*
  • Spectrometry, Gamma


  • Radioisotopes
  • Beryllium