Developing a detection method of environmental 244Pu

Stephan Winkler, Irshad Ahmad, Robin Golser, Walter Kutschera, Kent A. Orlandini, Michael Paul, Alfred Priller, Peter Steier, Angelika Valenta, Christof Vockenhuber

    Publications: Contribution to bookContribution to proceedings

    Abstract

    The long-lived radionuclide 244Pu (t1/2=80.8±1.0 Ma) is a candidate for the detection as a live remnant of close-lying and relatively recent supernovae in geological records on the earth. We will present the development of an AMS method for measuring 244Pu at the low abundance levels which are expected for natural 244Pu. For artificial samples prepared from chemically pure reagents a sensitivity of more than 3 × 10−6 counts in detector per atom in sputter target was achieved. For true sediment samples the detector background induced by chemical impurities and possible cross contamination from high level standards were identified as the present limitations.
    Original languageEnglish
    Title of host publicationProceedings of the Ninth International Conference on Accelerator Mass Spectrometry
    Subtitle of host publication(AMS-9) Nagoya University, Nagoya, Japan, 9-13 September 2002
    EditorsH.H. Andersen
    PublisherElsevier BV, North-Holland
    Pages817-822
    Number of pages6
    DOIs
    Publication statusPublished - 2004

    Publication series

    SeriesNuclear Instruments & Methods in Physics Research. Section B. Beam Interactions with Materials and Atoms
    ISSN0168-583X

    Austrian Fields of Science 2012

    • 1030 Physics, Astronomy

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