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Open Access Green as soon as Postprint is submitted to ZB.
Vertical migration of Plutonium-239 + -240, Americium-241 and Caesium-137 fallout in a forest soil under spruce.
Analyst 117 3, 469-474 (1992)
The vertical activity distributions of fallout 238Pu, 239+240Pu 241 Am, 137Cs and 137Cs in a forest soil (Hapludult) were determined at several locations in a spruce stand separately according to their origin (global fallout or Chernobyl fallout). To determine the rate of migration of these radionuclides in each soil horizon, the observed depth profiles of the radionuclides were evaluated with a compartment model. In the top organic horizons (LOf1 and Of2), the migration rates for all radionuclides from both sources were above 0.5 cm per year. In the Oh horizon the migration rates observed for global fallout Pu, Am and Cs were similar (0.2-0.4 cm per year). Compared with Pu, however, the mobility of Am is slightly, but statistically significantly, enhanced. The highest rate in this layer was found for Chernobyl-derived radiocaesium (2 cm per year). In the layers of the mineral horizon (depth 0-2, 2-5 and 5-10 cm) the observed migration rates were very similar for global fallout Pu (0.08-0.7 cm per year) and Am (0.1-2 cm per year). In comparison, the migration rate of global fallout radiocaesium was about half in each layer. The highest rate was observed again for Chernobyl-derived radiocaesium (0.5-3 cm per year).
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Americium ; Forest ; Migration ; Plutonium ; Soil
ISSN (print) / ISBN
0003-2654
e-ISSN
1364-5528
Journal
Analyst, The
Quellenangaben
Volume: 117 3,
Pages: 469-474
Publisher
Royal Society of Chemistry (RSC)
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Radiation Protection (ISS)