Carbon, cesium and iodine isotopes in Japanese cedar leaves from Iwaki, Fukushima

Sheng Xu, Gordon T. Cook, Alan J. Cresswell, Elaine Dunbar, Stewart P.H.T. Freeman, Xiaolin Hou, Helen Kinch, Philip Naysmith, David W.C. Sanderson, Luyuan Zhang

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    Japanese cedar leaves from Iwaki, Fukushima were analyzed for carbon, cesium and iodine isotopic compositions before and after the 2011 nuclear accident. The Δ14C values reflect ambient atmospheric 14C concentrations during the year the leaves were sampled/defoliated, and also previous year(s). The elevated 129I and 134,137Cs concentrations are attributed to direct exposure to the radioactive fallout for the pre-fallout-expended leaves and to internal translocation from older parts of the tree for post-fallout-expended leaves. 134Cs/137Cs and 129I/137Cs activity ratios suggest insignificant isotopic and elemental fractionation during translocation. However, fractionation between radioiodine and radiocesium is significant during transportation from the source.
    Original languageEnglish
    JournalJournal of Radioanalytical and Nuclear Chemistry
    Issue number2
    Pages (from-to)927-934
    Publication statusPublished - 2016

    Bibliographical note

    © The Author(s) 2016. This article is published with open access at


    • Japanese cedar leaf
    • 14C
    • 129I
    • 134,137Cs
    • Fukushima nuclear accident

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