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Geographical distribution of plutonium derived from the atomic bomb in the eastern area of Nagasaki

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Abstract

In order to know the distribution of plutonium derived from the Nagasaki atomic bomb, soil samples were measured to determine the 240Pu/239Pu isotope ratio of and concentrations of 239+240Pu and 137Cs. The 239+240Pu concentrations in soils, except for Nishiyama area, were close to the average concentration of soil collected in Japan. In soils collected at the Nishiyama area and at the eastern area of Nagasaki Prefecture and at part of northern area in Kumamoto Prefecture, the 240Pu/239Pu ratios were lower than the global fallout values. This suggests that plutonium from the atomic bomb was deposited in the eastern area from the hypocenter reaching up to 100 km eastwards.

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Authors and Affiliations

  1. Division of Environment and Radiation Sciences, Nuclear Science and Energy Directorate, Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki, 319-1195, Japan

    Y. Saito-Kokubu, K. Yasuda, M. Magara, Y. Miyamoto, S. Sakurai & S. Usuda

  2. School of Science and Engineering, Department of Life Sciences, Kinki University, Higashiosaka, Osaka, 577-8502, Japan

    H. Yamazaki

  3. Graduate School of Sciences, Osaka City University, Osaka, Osaka, 558-8585, Japan

    S. Yoshikawa

Authors
  1. Y. Saito-Kokubu
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  2. K. Yasuda
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  3. M. Magara
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  4. Y. Miyamoto
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  5. S. Sakurai
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  6. S. Usuda
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  7. H. Yamazaki
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  8. S. Yoshikawa
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Saito-Kokubu, Y., Yasuda, K., Magara, M. et al. Geographical distribution of plutonium derived from the atomic bomb in the eastern area of Nagasaki. J Radioanal Nucl Chem 273, 183–186 (2007). https://doi.org/10.1007/s10967-007-0733-9

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  • DOI: https://doi.org/10.1007/s10967-007-0733-9

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