Pioneering applications in AMS for the development of environmental radiology: Studies towards the implementation of <sup>90</sup>Sr and <sup>135</sup>Cs AMS

DOI

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Other Title
  • 環境放射能学の発展を目指したAMSにおけるアプリケーションの開拓: <sup>90</sup>Srと<sup>135</sup>Cs AMSの実用化に向けた研究

Abstract

<p>We have developed new analytical methods for 90Sr (28.79 yr) and 135Cs (2.3x106 yr) by accelerator mass spectrometry (AMS) for the further development of the research on the environmental fate of artificial radionuclides 90Sr and 137Cs (30.1 yr). The AMS method enables the analysis of trace amounts of 90Sr and 135Cs with a simple chemical separation procedure. Having a longer half-life 135Cs applies as a proxy for 137Cs. For 90Sr, SrF2 targets were prepared from radioactive environmental reference materials with known 90Sr concentrations (IAEA) by a chemical separation procedure that takes about two days to complete. 90Sr measured by AMS at VERA, University of Vienna. As a result, a limit of detection of ＜0.1 mBq was obtained, which is comparable to the β ray measurement. The detection of 90Sr in environmental samples was also successful, indicating that the 90Sr AMS can apply to environmental samples. On the other hand, there are still some technical challenges in the 135Cs AMS. Therefore, the experimental measurements are in progress.</p>

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Details 詳細情報について

  • CRID
    1390571868619029504
  • NII Article ID
    130008129819
  • DOI
    10.14862/geochemproc.68.0_188
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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