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

我们三年来的研究一直是根据数据和计算与美国群体进行讨论。这些会议于2000年12月在广岛的辐射效应研究基金会举行，并于2001年3月在2001年6月在克利夫兰举行了一次会议。美国人建议完成直到2002年3月。但是，我们的一方提议我们需要更多的讨论来获得协议。德国Ruehm博士首先介绍了CI-36数据，并表明这些数据与DS86在倾斜范围1公里的DS86一致。​​2002年3月1日，我们在圣地亚哥附近的La Jolla的Saic开会。成员来自日本卫生和劳动部，美国。科学家是博士。考尔，埃格伯特，克里斯蒂，桑托罗和斯特劳姆。从日本一侧，博士。 Hasai和Hoshi参加了会议。 Fujita Rerf博士也加入了。 Young博士介绍了我们方面的计算，并讨论了基础。总而言之，他们抬高了20m的爆发（火球），而产量保持为15 kt tnt。计算出的剂量与DS86相同的倾斜范围相同。其他点如下：1.CI接近地面的收益率仍然低于DS02，这是新计算。 2. EU数据与接近零接近的DS02一致，但是在1 km时更高。 3.CO-60数据几乎达成协议。 4.P-32数据比DS02.5.CU-64数据不矛盾DS02.6.TLD数据不会更改DS02或零点零位。 。 Los Alamos负责源量表；但是，他们不接受Hoshi提出的源术语的更改。如果Los Alamos不更改Epiceter 20 M海拔20 m海拔的源头，则最适合数据。但是，我们无法验证它将是最终的正确结果。现在，我们正在通过与测量相关的所有参与者进行CI和欧盟测量之间的比较测量。我们应该等待其结果找到真正的原因

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

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

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。

R.L.Fleisher, S.Fujita, M.Hoshi: "Hiroshima neutron fluence on a glass button from near ground zero"Health Physics.. 81・6. 720-723 (2001)

R.L.Fleisher、S.Fujita、M.Hoshi：“广岛中子对近零地的玻璃按钮的注量”健康物理学.. 81・6（2001）

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-^7 Li reaction or from fission of^<235> U."Phys.Med.. 46・10. 2681-2695 (

K.Tanaka、T.Kobayashi、Y.Sakurai、Y.Nakakawa、S.Endo、M.Hoshi：“使用 2.5 MeV 质子-^7 Li 反应中的慢化中子进行中子捕获治疗的人体头部模型中的剂量分布或来自 ^<235> U."Phys.Med.. 46・10. 2681-2695 (