Abstract
The radioactivity of 90Sr and 137Cs in environmental samples, bark and leaf, collected around the Fukushima Daiichi Nuclear Power Plant in May 2013 was determined with the aim of investigating the migration of both nuclides using their radioactivity ratio. The radioactivity of 90Sr was determined by using Cherenkov counting of 90Y after purification using Sr resin and that of 137Cs was determined by γ-spectrometry. Quench correction in Cherenkov counting was investigated by measurements of samples spiked with purified 90Y revealed that the radioactivity could be evaluated without quench correction. The radioactivity ratio of 90Sr to 137Cs in bark samples of 4.2 × 10−3 and 1.2 × 10−2 was compared with the results from soil samples collected in July 2011 to show that the migration of 90Sr was slower than 137Cs in bark and tree.
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Acknowledgments
We wish to thank Mr. Mitsuyuki Konno and Mr. Satoru Matsuzaki for their help in collecting environmental samples. This work was supported by the KUR Research Program for Scientific Basis of Nuclear Safety.
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Kubota, T., Shibahara, Y., Fukutani, S. et al. Cherenkov counting of 90Sr and 90Y in bark and leaf samples collected around Fukushima Daiichi Nuclear Power Plant. J Radioanal Nucl Chem 303, 39–46 (2015). https://doi.org/10.1007/s10967-014-3348-y
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DOI: https://doi.org/10.1007/s10967-014-3348-y