Behavior of Beryllium-7 in Air in the Region of the Nuclear Industrial Complex in Sosnovyi Bor, Leningrad Oblast, Russia
摘要
The 7Be activity in near-surface atmospheric aerosols and in atmospheric precipitations that fell out on the territory of the Aleksandrov Research Institute of Technology during the eight-year period covering the end of the 24th and the beginning of the 25th solar activity cycles (2016–2023) are reported. The many-year mean volume activity of 7Be in atmospheric aerosols was calculated from the monthly data of the radiation monitoring of the atmosphere at four posts of the automated radiation monitoring system; the value of 3.2 mBq/m3 was obtained. The seasonal trends in variation of the 7Be volume activity in air with a gradual increase from January to a maximum in June, followed by a decrease in the second half of the year, were determined. The inverse dependence of the annual mean volume activity of 7Be in the aerosols on the solar activity (Wolf numbers) was confirmed. The correlation coefficients of the 7Be activity in aerosols with the weather parameters (air temperature, relative humidity, wind speed, atmospheric pressure, and amount of precipitations) were calculated. The independence of the 7Be content in atmospheric aerosols from anthropogenic factors and trends in the variation of its volume activity during a year cycle allow 7Be to be used in the future as a natural tracer for evaluating the air pollution with manmade radionuclides.