title: Tracing anthropogenic nuclear activity with (129)I in lake sediment.
abstract: This study reports the first data of (129)I fallout in Scandinavia, covering the last 80 years. The investigation is based on sediment sections from a lake in central Sweden. In addition to analysis of (129)I, a combination of several radionuclides ((210)Pb, (137)Cs and (14)C) was used to establish an accurate chronology of the sediment profile. The concentration of (129)I exhibits an increasing trend ( approximately 10(7) to approximately 10(9)atoms/g) during the last 40 years, suggesting a significant atmospheric input from the nuclear reprocessing facilities in Sellafield (UK) and La Hague (France). A peak corresponding to fallout from the Chernobyl accident (1986) is clearly distinguishable, whereas the impact of fallout from the nuclear weapons' tests since the early 1950s is not distinguished.
authors: Tandem Laboratory, Uppsala University, Box 529, SE-751 20 Uppsala, Sweden. edvard.englund@angstrom.uu.se
authors: E
authors: E
authors: Englund
authors: A
authors: A
authors: Aldahan
authors: G
authors: G
authors: Possnert
mesh_terms: D005602:France; D019015:Geologic Sediments / Q000737:chemistry*; D007457:Iodine Radioisotopes / Q000032:analysis*; D006113:United Kingdom; D014875:Water Pollutants, Radioactive / Q000032:analysis*
chemical_list: D007457:Iodine Radioisotopes; D014875:Water Pollutants, Radioactive