Measurement of Residual ^<60>Co Activity Induced by Atomic-bomb Neutrons in Nagasaki and Background Contribution by Environmental Neutrons

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概要

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• Residual ^<60>Co activity in five steel samples induced by neutrons from the Nagasaki atomic bomb has been measured within about 1000 m from the hypocenter. The chemical separation of cobalt and nickel from steel samples was performed, and cobalt-enriched samples were prepared for all samples. Gamma-ray measurements were carried out with a low-background well-type germanium detector. The gamma-ray spectra for five samples were compared with the spectrum of a control sample to ensure that the observed ^<60>Co was actually induced by A-bomb neutrons. The activation of cobalt by environmental neutrons was also investigated. It has been shown that the present ^<60>Co data are consistent with earlier Hashizume's data.

• 日本放射線影響学会の論文

著者

• TAKADA JUN

  Research Institute for Radiation Biology and Medicine, Hiroshima University

• HOSHI MASAHARU

  Research Institute for Radiation Biology and Medicine, Hiroshima University

• 高田 純

  Department Of Physics School Of Medicine Sapporo Medical University

• 静間 清

  広島大学大学院工学研究科

• OKUMURA Yutaka

  Atomic Bomb Disease Institute, Nagasaki Univ. , Sch. Med.

• Shibata T

  Kyoto Univ. Kyoto

• 遠藤 暁

  Mechanical System Engineering Graduate School Of Engineering Hiroshima University

• Endo Satoru

  Department Of Biochemistry Cancer Institute Okayama University Medical School

• Takada J

  Okayama Univ. Okayama Jpn

• SHIZUMA KIYOSHI

  Graduate School of Engineering, Hiroshima University

• ENDO SATORU

  Graduate School of Engineering, Hiroshima University

• IWATANI KAZUO

  Hiroshima Prefectural College of Health and Welfare

• HASAI HIROMI

  Department of Electrical Engineering, Hiroshima Kokusai Gakuin University

• OKA TAKAMITSU

  Kure University

• FUJITA SHOICHIRO

  Radiation Effects Research Foundation

• WATANABE TADAAKI

  Radiation Effects Research Foundation

• IMANAKA TETSUJI

  Research Reactor Institute, Kyoto University.

• SHIMAZAKI TATSUYA

  Kumamoto University Radioisotope Center

• Shibata Tadashi

  Department Of Physics Faculty Of Science Osaka University

• Endo Satoru

  Div. Environ. Biol. Res. Inst. Rad. Biol. And Med. Hiroshima University

• Itoh Tetsuo

  広島大学 工学研究科機械システム工学専攻

• Hoshi Masaharu

  Research Institute For Nuclear Medecine And Biology Hiroshima University

• Shizuma Kiyoshi

  広島大学 工学研究科機械システム工学専攻

• Itoh T

  Atomic Energy Research Institute Kinki University

• Hasai Hiromi

  Department Of Applied Physics And Chemistry Faculty Of Engineering Hiroshima University

• Okumura Yutaka

  Atomic Bomb Disease Insti.

• Okumura Yutaka

  Atomic Disease Institute Nagasaki University School Of Medicine

• Oka Takamitsu

  Kure Univ. Kure Jpn

• 静間 清

  広島大学大学院工学部工学研究科

• Imanaka Tetsuji

  Research Reactor Inst Kyoto Univ.

• Hasai H

  Department Of Electrical Engineering Hiroshima Kokusai Gakuin University

• Fujita S

  Radiation Effects Research Foundation

• Shima Tatsushi

  Rcnp Osaka University

• Takada Jun

  Research Institute For Nuclear Medicine And Biology Hiroshima University

• IMANAKA Tetsuji

  Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology

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