Airborne Cs, Sr and total beta activity in northern Finland in the 1960s
نویسندگان
چکیده
Air filter samples collected at Sodankylä (6722’N, 2639’E) were analyzed for determining concentrations of Cs, Sr and total beta in surface air at northern Finland during 1963. Activity concentrations of Cs, Sr and total beta varied seasonally being highest in spring and summer, due to enhanced transportation of aerosols containing radioactive particles from stratosphere to troposphere during warm seasons. Activity ratio Cs/Sr in air of Sodankylä was 0.68(±0.24) – 13(±4), the median value 1.97 suggests the radioactive contamination source to be global nuclear test fallout in 1963. No direct deposition from Novaya Zemlya was detected.
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