Experimental revaluation of the neutron and gamma-ray doscs from the Hiroshima atomic bomb

广岛原子弹中子和伽马射线剂量的实验重新评估

• 批准号: 11490034
• 负责人: HOSHI Masaharu
• 金额: $ 4.61万
• 依托单位: Hiroshima Kokusai Gakuin University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11490034/
• 关键词: Atomic bomb; Neutron; Gammaray; Dosimetry; Hiroshima; Neutron actvation; atomic bomb; neutron; gammaray; dosimetry; hiroshima; neutronactivation

Our study for three years has been to discuss with American groups based on the data and calculation taken until that time. The meetings were held at Radiation Effects Research Foundation in Hiroshima in December 2000 and in March 2001.In June 2001 we had a meeting at Cleveland. There Americans proposed to finish until March 2002.However, our side proposed that we need more discussion to get agreements. Dr. Ruehm Germany presented CI-36 data first and showed that these data agree with DS86 at 1 Km slant range.On 1st of March 2002 we had a meeting at SAIC in La Jolla near San Diego. Members are from Ministry of Health and Labor Japan, DOE US. Scientists are Drs. Kaul, Egbert, Christy, Santoro and Straume. From Japanese side, Drs. Hasai and Hoshi attended. Dr. Fujita RERF joined also. Dr. Young presented calculations of US side and discussed base on this. In conclusion, they raised 20m up the burst heght (fireball point) while the yield was kept as 15 Kt TNT. The calculated doses are the same as DS86 more that 1 Km slant range. Other points are as follows : 1.CI yield near ground zero are still lower than DS02, which is new calculation. 2.Eu data are agree with DS02 near ground zero however are higher at 1 Km. 3.Co-60 data are almost agreed. 4.P-32 data are a little bit higher than DS02.5.Cu-64 data are not contradicted with DS02.6.TLD data are not changed by DS02 or a little bit low at ground zero.We discussed based on his presentation. Los Alamos is in charge of the source termcalculation ; however, they do not accept the change of the source term as proposed by Hoshi. If Los Alamos do not change the source in Hiroshima 20 m elevation of the epiceter will brought to best fit for the data. However we cannot verify it will be the final correct result. We are now performing intercomparison measurements between CI and Eu measurements by all of the participans related to measurements. We should wait for its results to find true reasons

三年来，我们的研究一直是根据当时的数据和计算与美国团体进行讨论。会议于2000年12月和2001年3月在广岛的辐射效应研究基金会举行。美方提议在二○ ○二年三月前完成，我方则提出需要进一步讨论才能达成协议。德国的Ruehm博士首先提出了CI-36的数据，并表明这些数据与DS 86在1公里的斜距上是一致的。成员来自日本厚生劳动省、美国能源部。科学家是考尔、埃格伯特、克里斯蒂、桑托罗和斯特劳梅博士。来自日本方面的Hasai博士和Hoshi博士出席了会议。Fujita RERF博士也加入了。杨博士介绍了美国方面的计算，并在此基础上进行了讨论。总之，他们将爆炸高度（火球点）提高了20米，而当量保持在15 Kt TNT。计算的剂量与DS 86相同，大于1 Km斜程。其他要点如下：1.归零点附近的CI产率仍然低于DS 02，这是新的计算。2.Eu数据在近零点处与DS 02一致，但在1 Km处高于DS 02。3.Co-60数据基本一致。4.P-32数据略高于DS 02。5.Cu-64数据与DS 02数据不矛盾。6.DSPs数据不受DS 02的影响或在地面零点处略低。洛斯阿拉莫斯负责源项计算;然而，他们不接受Hoshi提议的源项更改。如果洛斯阿拉莫斯不改变源在广岛20米高程的epiceter将带来最适合的数据。但是，我们无法验证它是否是最终正确的结果。我们现在正在进行CI和Eu测量之间的相互比较测量，由所有与测量有关的测量人员进行。我们应该等待它的结果来寻找真正的原因

项目成果

S.Endo, E.Yoshidai, W.Zhang, K.Fujikawa, T.Itoh, M.Ishikawa, M.Hoshi, K.Shizuma: "Neural Networks for the Neutron Spectrun Determination Based on the Foil Activation Method"Jp.j.Appl.Phys.. 41. 1-4 (2002)

S.Endo、E.Yoshidai、W.Zhang、K.Fujikawa、T.Itoh、M.Ishikawa、M.Hoshi、K.Shizuma：“基于箔激活法的中子谱测定神经网络”Jp.j

Ivannikov, AI. Skvortsov, V.G. Stepanenko, V.F. Tikunov, D.D. Takabe, J. Hoshi, M: "ESR tooth enamel dosimetry : Optimization of the automated spectra deconvolution routine"Health Physics. Vol.81 No.2. 124-137 (2001)

伊万尼科夫，AI。

K.Tanaka, T.Kobayashi Y.Sakurai, Y.Nakagawa S.Endo, M.Hoshi: "Dose distribution in a human head phantom for neutron capture therapy using moderatedneutrons from the 2.5 MeV proton-^7 Li reaction or from fission of^<235> U."Phys.Med.. 46・10. 2681-2695 (200

K.Tanaka、T.Kobayashi Y.Sakurai、Y.Nakakawa S.Endo、M.Hoshi：“使用来自 2.5 MeV 质子-^7 Li 反应或来自裂变的中中子进行中子捕获治疗的人体头部模型中的剂量分布^<235>U.“物理医学..46・10.2681-2695（200

K, Tanaka. T, Kobayashi. Y, Sakurai. Y, Nakagawa. S, Endo. M, Hoshi: "Dose distribution in a human head phantom for neutron capture therapy using moderated neutrons from the 2.5 MeV proton-Li reaction or from fission of <235>^U"Phys. Med. Vol.46 No.10. 26

K，田中。

R, L, Fleisher. S, Fujita. M, Hoshi: "Hiroshima nectron fluence on alglass button from near ground zero"Health Physics. Vol.81 No.6. 720-723 (2001)

R、L、弗莱舍。