MONITORING COSMOGENIC AND TERRESTRIAL RADIONUCLIDES IN GROUND LEVEL AIR SAMPLES BY GAMMA SPECTROMETRY IN ALBANIA

Erjon Spahiu, Irma Bërdufi, Manjola Shyti, Florinda Cfarku

Pages: 54–57

DOI: 10.37392/RapProc.2022.13

The activity concentrations of 7Be, 210Pb, 40K and 137Cs in ground level air at the monitoring station in Tirana, Albania were determined during the period from January 2021 to January 2022. To perform a routine air radioactivity monitoring, we used a typical aerosol sampling station located at the Institute of Applied Nuclear Physics in Tirana not only for routine air radioactivity monitoring, but also to monitor the air in the institute from the radiation protection point of view because in the institute are located the temporary radioactive waste site, 137Cs source used in the secondary standard dosimetry laboratory and 137Cs irradiation source. Activities in all aerosol samples are measured by gamma spectrometer with High Purity Germanium detector (HPGe). The cylinder geometry efficiency curve generated by Canberra’s Laboratory Sourceless Calibration Software (LabSOCS) was used to analyze the air filters. The obtained results show the activity concentrations of cosmogenic 7Be ranged from 2.38 to 6.82 mBq m–3 with a maximum in the spring/summer period. The activity concentrations for 210Pb were in the range 0.37 to 1.27 mBq m–3. The activity concentrations of anthropogenic 137Cs in ground level air was observed only in three air filters in the range 0.30–6.01 μBq m–3. The monitoring is done for the first time in Albania, providing us the data of cosmogenic and terrestrial radionuclides in ground level air. This study will continue also in the future in order to see the variation of radionuclides during the years.
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