Title: Vertical Distribution of 238Pu, 239(40)Pu, 241Am, 90Sr and 137Cs in Austrian Soil Profiles
Citation: RADIOCHIMICA ACTA vol. 96 p. 733-738
Publication Year: 2008
JRC N°: JRC48618
ISSN: 0033-8230
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC48618
DOI: 10.1524/ract.2008.1559
Type: Articles in periodicals and books
Abstract: The occurrence of 238Pu, 239(40)Pu, 241Am, 90Sr and 137Cs in the region of Nassfeld (Salzburg, Austria) is discussed at four different locations by evaluating a depth profile for each radionuclide. Furthermore, the plutonium separated from the soil samples was measured by Accelerator Mass Spectrometry (AMS) to get information on the isotope ratio 240Pu/239Pu. The radiochemical procedure consisted of a Pu separation step from Am and Sr by anion exchange in 8M HNO3 after oxidation state adjustment to Pu(IV). Am and Sr were coprecipitated with calcium oxalate. Am was separated from Sr by extraction chromatography using TRU-resin. The Sr separation was performed also by extraction chromatography using Sr-resin; after coprecipitation as oxalate, 90Sr was measured in a gas proportional counter. For the determination of 239(40)Pu and 241Am by a-spectrometry thin sources were prepared by microprecipitation with NdF3.
JRC Directorate:Nuclear Safety and Security

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