As a result of the accident at the nuclear power reactor in Chernobyl in 1986, considerable amounts of radionuclides were released into the atmosphere and transported subsequently also to South Germany. Even though the period of fresh fallout lasted in Bavaria for only a few days (30 April to 8 May, 1986), the long-lived radionuclide ~(137)Cs (physical half-life 30.17 years) has nevertheless been observed for many years in comparatively large quantities in the air and in the precipitation at Munich-Neuherberg, where the radioactivity in these samples has been determined continually since 1970.
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