| Project/Area Number |
14390054
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
広領域
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| Research Institution | HIROSHIMA KOKUSAI GAKUIN UNIVERSITY |
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Principal Investigator |
HASAI Hiromi Hiroshima Kokusai Gakuin University, President, 工学研究科, 教授 (70034337)
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| Co-Investigator(Kenkyū-buntansha) |
HOSHI Masaharu Hiroshima University, Research Institute for Radiation Biology and Medicine, Professor, 原爆放射線医科学研究所, 教授 (50099090)
SHIZUMA Kiyoshi Hiroshima University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (10127657)
ENDO Satori Hiroshima University, Research Institute for Radiation Biology and Medicine, Associate Professor, 原爆放射線医科学研究所, 助教授 (90243609)
SHIBATA Tokushi High Energy Accelerator Research Organization, Professor, 教授 (80028224)
NAKANISHI Takashi Kanazawa University, Faculty of Physics, Professor, 理学部, 教授 (00019499)
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| Project Period (FY) |
2002 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥8,000,000 (Direct Cost: ¥8,000,000)
Fiscal Year 2004: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2003: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2002: ¥4,800,000 (Direct Cost: ¥4,800,000)
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| Keywords | Atomic bomb / Neutron / DS86 / Radiation dose / Benchmark Test / Gamma-ray / Hiroshima / 原爆線量 / 線量評価 / 中性子線 / 原爆 / γ線 / Atomic bomb / Neutron / Gammaray / Dosimetry / Hiroshima / Neutron activation |
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| Research Abstract |
Collaboration between US-Japan had been performed to construct the dosimetry study 1986 (DS86). After the decision of DS86 we found the discrepancy between the data and calculation and therefore we continued collaboration to know its reasons. We had 16 times of US-Japan workshops for this purpose. In January 2003 the problem was solved by intercomparison measurements and we agreed each other at Pasadena California in March 2003. In March, 2003 the new Dosimetry System 2002 (DS02) was accepted by the US-Japan senior committee members. However in July 2003, one of the data related to Ni-63 activation had been published in Nature without any information for the other participants of US-Japan joint study. We protested strongly for these authors and succeeded in adding the authors of Japanese side who collected samples and that in correcting some of the wrong sentences in this paper. For these 3 years we measured beta rays from Ni-63 and continued the discussion for the residual problems. As one of the residual problems we are asking Belgium scientist to measure Co-60 and compare with our former results. We had our workshop within Japanese side at the Research Reactor Institute of Kyoto University. One of the most successful studies is international intercomparison measurements, such as (1)collaboration by US, Japan and Germany, (2)Eu-152 measurements by Kanazawa group using chemically extracted Eu-152 activities done by Japan Chemical Analysis Center. We used 18 already collected samples. There were two questions (1)Eu-152 data were higher than DS86 more than 1km ground range and (2)DS86 is higher than Eu-152 at close distance. Both problems are solved since Eu-152 data at long distance decreased, and calculation decreased at short distances by elevating explosion heights 20m. DS02 will be soon published (maybe coming June) and we must publish each paper for Journals.
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