Uranium Isotopes in Hiroshima "Black Rain" Soil
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概要
- 論文の詳細を見る
Uranium isotopes were studied to clarify the fallout from the Hiroshima atomic bomb. The ^<234>U/^<238>U activity ratios of uranium leached from the soil in the Hiroshima fallout area were significantly higher than those of other areas according to alpha ray spectrometry. The correlation of specific activity of the fission product ^<137>Cs and the ^<234>U/^<238>U activity ratios was studied. Two different correlations were established inside and outside the fallout area. The results of this study suggest that manifestations of fallout from the Hiroshima atomic bomb are still detectable in the "black rain" area Soon after the Hiroshima atomic bomb exploded, fission products in earth and sand collected on a rain pipe of a house 3 kilometers from the hypocenter, were identified by Kimura and Murakami. However, enriched uranium of the Hiroshima atomic bomb was not found. In Nagasaki, however, high level fission products and ^<239>Pu of the atomic bomb were discovered in the Nishiyama district.
- 日本放射線影響学会の論文
著者
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TAKADA JUN
Research Institute for Radiation Biology and Medicine, Hiroshima University
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HOSHI MASAHARU
Research Institute for Radiation Biology and Medicine, Hiroshima University
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Hoshi Masaharu
Research Institute For Nuclear Medecine And Biology Hiroshima University
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Sakanoue Masanobu
Low Level Radioactivity Laboratory, Kanazawa University
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Sakanoue Masanobu
Low Level Radioactivity Laboratory
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SAWADA SHOZO
Research Institute for Nuclear Medicine and Biology, Hiroshima University
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Sawada Shozo
Research Institute For Nuclear Medicine And Biology Hiroshima University
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Takada Jun
Research Institute For Nuclear Medicine And Biology Hiroshima University
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