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  • 1 University Vienna Institute of Inorganic Chemisry Währingerstr. 42 A-1090 Wien (Austria)
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Ratios of90Sr/137Cs and239(240)Pu/137Cs have been determined in surface air by radiochemical analyses of air filter samples collected at different cities in Austria during the period April, 28–May, 9 1986. The mean values of these ratios remain below 2·10–2 and 1·10–5, respectively, i.e., several orders of magnitude smaller than those from fallout contamination after the atomic weapon tests in 1963. Already few such ratios enable a quick first assessment of radiological emergency situations.