Abstract
A new, fast technique for trace analysis of the radioactive isotopes89Sr and90Sr in environmental samples has been developed. Conventional mass separation is combined with resonance ionization spectroscopy in collinear geometry, which provides high selectivity and sensitivity. In addition, a chemical separation procedure for sample preparation has been developed. The described technique was used to determine the90Sr content in ≈ 870 m3 air samples collected near Munich during and shortly after the Chernobyl reactor accident in April 1986. The content of90Sr was measured to be 1.4 mBq per m3, corresponding to 1.6 × 109 atoms of90Sr per sample. This value is in good agreement with the results of radiochemical measurements.
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This publication comprises part of the Dissertations of J. Stenner and K. Zimmer
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Zimmer, K., Stenner, J., Kluge, H.J. et al. Determination of90Sr in environmental samples with resonance ionization spectroscopy in collinear geometry. Appl. Phys. B 59, 117–121 (1994). https://doi.org/10.1007/BF01081161
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DOI: https://doi.org/10.1007/BF01081161