K. Irlweck et J. Wicke, ISOTOPIC COMPOSITION OF PLUTONIUM IMMISSIONS IN AUSTRIA AFTER THE CHERNOBYL ACCIDENT, Journal of radioanalytical and nuclear chemistry, 227(1-2), 1998, pp. 133-136
Alpha-spectrometric Pu determinations in aerosol samples collected aft
er the Chernobyl accident in Austria show a Pu-238/(239(240))Pu ratio
in the range of 0.33-0.76 with a most reliable value of 0.47. From Am-
241 measurements in old Pu preparations and air filter analyses also P
u-241 activities have been calculated. The ratio Pu-241/(239(240))Pu d
uring the main contamination period is 74.6+/-5.7, when maximum Pu-241
concentrations in air achieved 4.5-6.0 mBq/m(3).