Cosmogenic 22Na, 7Be and terrestrial 137Cs, 40K radionuclides in ground level air samples collected weekly in Kraków (Poland) over years 2003–2006

• DOI: 10.1007/s10967-014-3049-6
• Publication Date: 2014-03-08T15:28:03Z
• Authors: Sylwia Błażej; Jerzy W. Mietelski
• Keywords: Ground level; Gamma ray spectrometer

A low background gamma spectrometer with an Etruscan, 2500 years old lead shield and a muon veto detector were applied to study 22Na 7Be activity concentration in ground level air aerosol samples collected weekly over the 2003-2006 Kraków. Each sample was formed ca 100 000 m3 of passed air, two parallel ASS-500 high volume samplers. The results for 40K 137Cs are also presented reference comparison. Presented frequency distributions correlation between obtained discussed. confirmed seasonal variation be different all investigated radionuclides. Moreover, nucleus ratio noticed 7Be. Cosmogenic radionuclides being mainly stratospheric origin, subsequently attached fine aerosols, via which they transported air. mean transport time within troposphere estimated as equal 7.5 days on average, reaching even 50 warm seasons. Limitations model identified.