Validating calculation of Hiroshima-Nagasaki dosimetry system, DSO2 and estimation of neutron-induced radiation

2010 Fiscal Year Final Research Report

• Project/Area Number: 20510050
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Risk sciences of radiation/Chemicals
• Research Institution: Kyoto University
• Principal Investigator: IMANAKA Tetsuji Kyoto University, 原子炉実験所, 助教 (90109083)
• Co-Investigator(Kenkyū-buntansha): ENDO Satoru 広島大学, 大学院・工学研究院, 准教授 (90243609)
• Project Period (FY): 2008 – 2010
• Keywords: 広島・長崎 / 原爆放射線 / 残留放射線 / 誘導放射線 / 黒い雨 / DSO2

Research Abstract

Gamma-ray exposure from neutron-induced radionuclides in soil by Hiroshima and Nagasaki atomic bombings were estimated based on neutron fluence values on the ground obtained through the works developing the radiation dosimetry system, DSO2. Comparison of calculated exposure rates with measurements around the hypocenters several months after the bombings indicated an agreement in Hiroshima, while the calculated values were larger than measurements in Nagasaki. We began new efforts to reevaluate residual radiation taking into consideration the contribution of local fallout with so-called "black rain".

Research Products

• [Journal Article] Amendments to ^<63>Ni production calculation for Hiroshima by Takamiya et al. and DS02 fluence data by Egbert et al. (2011)
  • Author(s): K.Takamiya, T.Imanaka, SD.Egbert, W.Ruhm.
  • Journal Title: Radiation Environ Biophys 50 Pages: 329-333
  • Peer Reviewed
• [Journal Article] Feasibility of using ^<236>U to reconstruct close-in fallout deposition from the Hiroshima Atomic Bomb (2010)
  • Author(s): A.Sakaguchi, K.Kawai, P.Steier, T.Imanaka, M.Hoshi, S.Endo, K.Zhumadilov, M.Yamamoto.
  • Journal Title: Sci Total Environ 408 Pages: 5392-5398
  • Peer Reviewed
• [Journal Article] 広島原爆直後に実施された放射能調査活動 (2010)
  • Author(s): 今中哲二
  • Journal Title: 広島"黒い雨"研究会編「広島原爆"黒い雨"にともなう放射性降下物に関する研究の現状」(以下、「黒い雨報告書」) Pages: 11-24
• [Journal Article] 広島原爆の黒い雨にともなう沈着放射能からの空間放射線量の見積り (2010)
  • Author(s): 今中哲二
  • Journal Title: 黒い雨報告書 Pages: 87-99
• [Journal Article] Gamma-ray exposure from neutron-induced radionuclides in soil in Hiroshima and Nagasaki based on the DS02 calculation. (2008)
  • Author(s): T.Imanaka, S.Endo, K.Tanaka, K.Shizuma
  • Journal Title: Radiation Environ Biophys 47 Pages: 331-336
  • Peer Reviewed
• [Journal Article] Intercomparison study on ^<152>Eu gamma ray and ^<36>Cl AMS measurements for development of the new Hiroshima.Nagasaki Atomic Bomb Dosimetry System 2002 (DS02) (2008)
  • Author(s): M.Hoshi, S.Endo, K.Tanaka, M.Ishikawa, T.Straume, K.Komura, W.Ruehm, E.Nolte, T.Huber, Y.Nagashima, R.Seki, K.Sasa, K.Sueki, H.Fukushima, S.D.Egbert, T.Imanaka.
  • Journal Title: Radiation Environ Biophys 47 Pages: 313-32
  • Peer Reviewed
• [Presentation] 黒い雨にともなう沈着放射能からの空間放射線量の推定 (2010)
  • Author(s): 今中哲二
  • Organizer: 日本放射線影響学会第53回大会
  • Place of Presentation: 京都
  • Year and Date: 20101020-20101022
• [Presentation] 広島原爆早期入市者の疾病記録と誘導放射能による外部線量の評価 (2009)
  • Author(s): 今中哲二、遠藤暁、川野徳幸、田中憲一
  • Organizer: 日本放射線影響学会第52回大会
  • Place of Presentation: 広島
  • Year and Date: 20091111-20091113
• [Presentation] 広島原爆による黒い雨地域での放射能降下量の再検討 (2008)
  • Author(s): 今中哲二、星正治、静間清、遠藤暁, ほか7名
  • Organizer: 日本放射線影響学会第51回大会
  • Place of Presentation: 北九州
  • Year and Date: 20081119-20081121
• [Presentation] Reconstruction of residual radiation exposure by the atomic bombing in Hiroshima, Chronic Radiation Exposur e : Low-Dose Effects.
  • Author(s): 今中哲二
  • Organizer: The 4^<th> International Conference
  • Place of Presentation: Chelyabinsk, Russia.
  • Year and Date: 00001109-00001111
• [Remarks] ホームページ等:広島“黒い雨"研究会中間報告書
  • URL: http://city.youth-service.com/01publication/0301BlackRain2010.pdf