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

我们的研究持续了三年，一直在与美国团体进行讨论，这些研究是基于当时的数据和计算得出的。会议分别于2000年12月和2001年3月在广岛辐射效应研究基金会举行。2001年6月，我们在克利夫兰开了一次会。美国人提议到2002年3月结束。然而，我方建议需要更多的讨论来达成协议。Ruehm德国博士首先提出了CI-36数据，并表明这些数据在1公里倾斜范围内与DS86一致。2002年3月1日，我们在圣地亚哥附近的La Jolla举行了一次会议。成员来自日本厚生劳动省，DOE US。科学家是博士。保罗，埃格伯特，克里斯蒂，桑托罗和斯特劳姆。从日本方面来说，博士。Hasai和Hoshi出席了会议。Fujita博士也参加了会议。杨博士提出了美方的计算，并在此基础上进行了讨论。综上所述，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DS86在1 Km倾斜范围内相同。其他要点如下：1。零点附近的CI产量仍然低于DS02，这是新的计算。2.欧盟的数据与零地附近的DS02一致，但在1公里处更高。Co-60的数据几乎一致。4.P-32数据略高于DS02.5。Cu-64数据与DS02.6不矛盾。TLD数据不受DS02的影响，也不受地面零点的影响。我们根据他的报告进行了讨论。洛斯阿拉莫斯负责源项计算；然而，他们不接受Hoshi提出的对源项的改变。如果洛斯阿拉莫斯国家实验室不改变广岛的震源，那么20米的地震带高度将最符合数据。然而，我们无法证实这将是最终的正确结果。我们现在正在由所有与度量相关的参与者执行CI和Eu度量之间的相互比较度量。我们应该等待结果来找到真正的原因

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。