Nuclear Seminar - Ivan Sýkora (25.5.2022)
Wednesday 25.5.2022 at 14:00, Lecture room F1/364
By: Jaroslav Staníček
doc. RNDr. Ivan Sýkora, PhD.:
Radionuclides in Bratislava atmosphere
Abstract:
Variations of cosmogenic (7Be), primordial (40K), radiogenic (210Pb) and anthropogenic (137Cs) in Bratislava air were studied during 2001–2019 using a weekly sampling and HPGe gamma-spectrometry. While 7Be variations were associated with transport of air masses from the lower stratosphere to the ground level air, an inverse trend was observed for 210Pb variations due to infiltration of radon from the soil. The 137Cs activity concentrations (excluding the Chernobyl and Fukushima accidents) were decreasing with half-life of 1.9 years, however, during recent years they were almost constant. The increased atmospheric 40K levels were due to soil resuspension and radionuclide transport by winds.