Experimental evaluation of the neutron- and gamma-ray doses from the Hiroshima atomic bomb

广岛原子弹中子和伽马射线剂量的实验评估

基本信息

批准号：
14390054
负责人：
HASAI Hiromi
金额：
$ 5.12万
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：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14390054/
关键词：
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

项目摘要

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.

已经进行了美国 - 日本之间的合作，以构建1986年的剂量学研究（DS86）。在DS86的决定之后，我们发现了数据和计算之间的差异，因此我们继续协作以了解其原因。为此，我们有16次美国 - 日本研讨会。 2003年1月，通过比较测量结果解决了该问题，我们于2003年3月在加利福尼亚州帕萨迪纳（Pasadena California）相互同意。2003年3月，2002年新的Dosimetry System（DS02）被美国日本高级委员会成员接受。然而，在2003年7月，与日本联合研究的其他参与者有关，与NI-63激活有关的数据之一是在本质上发表的。我们强烈抗议这些作者，并成功地添加了日本一方的作者，这些作者收集了样本，并在纠正了本文中的一些错误的句子时。在这三年中，我们测量了NI-63的β射线，并继续讨论残留问题。作为残留问题之一，我们要求比利时科学家测量Co-60并与我们以前的结果进行比较。我们在京都大学研究反应堆研究所的日本一侧举办了研讨会。最成功的研究之一是国际比较测量值，例如（1）美国，日本和德国的合作，（2）Kanazawa组的EU-152测量，使用日本化学分析中心进行的化学提取的EU-152活动。我们使用了18个已经收集的样品。有两个问题（1）EU-152数据高于DS86的地面范围，而（2）DS86在近距离时高于欧盟-152。这两个问题都解决了，因为欧盟-152的长距离数据降低了，并且通过提高爆炸高度为20m，在短距离下降低了计算。 DS02即将发布（也许将于6月发布），我们必须将每篇论文发布用于期刊。