Air radionuclide patterns observed at Monaco from the Chernobyl accident |
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| Institution: | 1. Department of Advanced Materials Science, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan;2. Research Fellow of Japan Society for the Promotion of Science, 5-3-1 Koujimachi, Chiyoda-ku, Tokyo 102-0083, Japan;3. Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan;4. International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan |
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| Abstract: | Radionuclide concentrations in air filters taken in Monaco for several weeks after the Chernobyl accident on April 26, 1986 have been carefully examined. Unusual radionuclides such as 105Ru, 111Ag, 125Sn and 126Sb were identified as being present in small amounts. Nuclides of the more volatile elements I, Te, and Ag peaked 6–24 hours earlier than the average, whereas the refractory elements exhibited a different distribution. Radionuclide concentrations seen in air at Chernobyl compared with those observed at Monaco show that 134,137Cs was least removed by environmental processes between the two sites and rare earths the most. The second (4–5 May) peak of activity released from the Chernobyl reactor was characterised by a relatively higher content of refractory elements, also observed at Monaco. The different phases of such an accident can thus be observed even at distances approaching 2000 km. |
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