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

    Veröffentlichungen: Beitrag in BuchBeitrag in Konferenzband

    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.
    OriginalspracheEnglisch
    TitelProceedings of the Ninth International Conference on Accelerator Mass Spectrometry
    Untertitel(AMS-9) Nagoya University, Nagoya, Japan, 9-13 September 2002
    Redakteure*innenH.H. Andersen
    Herausgeber (Verlag)Elsevier BV, North-Holland
    Seiten817-822
    Seitenumfang6
    DOIs
    PublikationsstatusVeröffentlicht - 2004

    Publikationsreihe

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

    ÖFOS 2012

    • 1030 Physik, Astronomie

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