Measurement of Reaction Rate Ratio of Capture to Fission and Relative Production Fraction of Excited-to Ground-States of Am241

Am241俘获裂变反应速率比和激发态与基态相对生成分数的测量

• 批准号: 09680471
• 负责人: IWASAKI Tomohiko
• 金额: $ 1.86万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09680471/
• 关键词: transmutation; Americium; Neutron; Reactor; Fission; Capture; Neptunium; 捕獲; 核分裂

Fission reaction and capture reactions of Am241 and Np237 were measured in various cores with widely distributed spectrum indices by using the Kyoto University Critical Assembly (KUCA) as follows. (1) Preparation of a counting equipment and neutron fields in KUCA (2) Accurate measurement (experimental error <3%) of fission cross sections of Am241 (3) Accurate measurement (experimental error <3%) of fission cross section of Np237 (4) Precise analysis of those experiments by using the newest nuclear data libraries.From the present results, it was found that the newest libraries still overestimates the fission cross section of both nuclides about 20% which should be improved for design or research of the advanced reactors.

利用京都大学临界组件(KUCA)测量了AM241和Np237在光谱指数广泛分布的不同堆芯中的裂变反应和俘获反应如下。(2)准确测量AM241的裂变截面(实验误差为3%)。(3)精确测量Np237的裂变截面(实验误差为3%)。(4)利用最新的核数据库对这些实验进行了精确的分析。从目前的结果来看，最新的数据库仍然高估了这两个核素的裂变截面约20%，这一点应该为先进反应堆的设计或研究而改进。

项目成果

T.Iwasaki et al: "Measurement and Analysis of Np237 Capture Reaction Rate in Various"International Conference on "physics of Nuclear Science". 1711-1717 (1998)

T.Iwasaki等人：“各种Np237捕获反应率的测量和分析”国际“核科学物理学”会议。

Tomohiko IWASAKI, Toshimitu HOROIUCHI and Daisuke FUJIWARA, Hironobu UNESAKI, Seiji SHIROYA, Masatishi HAYASHI and Hiroshi NAKAMURA, Takanori KITADA, Nobuo SHINOHARA: "Measurement and Analysis of Capture Reaction Rate of Np237 in Various Neutron Filed by

Tomohiko IWASAKI、Toshimitu HOROIUCHI 和 Daisuke FUJIWARA、Hironobu UNESAKI、Seiji SHIROYA、Masatishi HAYASHI 和 Hiroshi NAKAMURA、Takanori KITADA、Nobuo SHINOHARA：“各种中子中 Np237 捕获反应率的测量和分析

S.Shiroya et al: "Measurement of Np237/U235 Fission Rate Ratio in Cores"International Conference on "Future Nuclear Systems". 1307-1310 (1997)

S.Shiroya 等人：“堆芯中 Np237/U235 裂变速率比的测量”“未来核系统”国际会议。

Tomohiko Iwasaki: "Measurement of Fast Neutron-Induced Fission Cross Section Ratio"Journal of Nuclear Science and Technology. 36. 127-134 (1999)

岩崎智彦：“快中子诱发裂变截面比的测量”核科学技术杂志。

Tomohiko Iwasaki: "Measurement and Analysis of Np237 capture reaction rate in KUR"Int. Conf. on "The physics of Nuclear Science and Technology". 1711-1717 (1998)

岩崎智彦：“KUR 中 Np237 捕获反应率的测量和分析”Int.