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Updated: Aug 10, 2026

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Displacement of Chernobyl fallout in snow layers of temperate Alpine glaciers
W Ambach1, W Rehwald, M Blumthaler
1Institute for Medical Physics, University of Innsbruck, Austria.
Abstract:
Measurements of the gross-beta-activity and a gamma-spectrum analysis of radioactive fallout from Chernobyl distributed in vertical snow profiles on an Alpine glacier were carried out. Samples were collected in summer 1986 and in summer 1987. A displacement of isotopes to depths of approximately 6 m was observed. The mean activity per unit area amounts to 10.4 and 6.6 kBq m-2 for samples from 1986 and 1987, respectively, both values corrected to 1 May 1987. Isotopes with half-lives shorter than 110m Ag (250 days) could no longer be detected in 1987.
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