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Progress in Earth and Planetary Science
Fig. 2 | Progress in Earth and Planetary Science

Fig. 2

From: Widespread distribution of radiocesium-bearing microparticles over the greater Kanto Region resulting from the Fukushima nuclear accident

Fig. 2

Radioactivity of 137Cs and 134Cs/137Cs activity ratio of individual particles. The radioactivity of 137Cs (± 1 × standard deviation, σ) of eight particles (A1~G1) are as follows: 0.471 ± 0.016 Bq (particle A1), 0.426 ± 0.015 Bq (B1), 0.546 ± 0.019 Bq (C1), 0.425 ± 0.014 Bq (D1), 0.318 ± 0.011 Bq (D2), 0.156 ± 0.008 Bq (E1), 0.317 ± 0.011 Bq (F1), and 0.665 ± 0.023 Bq (G1). The three dashed lines show estimates of the 134Cs/137Cs ratio of nuclear fuel in FDNPP reactors No. 1, 2, and 3, respectively, at the time of the accident, as calculated using ORIGEN2 Code (Nishihara et al. 2010). Activity values shown here were decay-corrected as of 11 March 2011

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