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Neutron capture cross sections of curium isotopes measured with ANNRI at J-PARC
Journal of Nuclear Science and Technology ( IF 1.2 ) Pub Date : 2021-01-04 , DOI: 10.1080/00223131.2020.1864492
Shoichiro Kawase 1 , Atsushi Kimura 1 , Hideo Harada 1 , Nobuyuki Iwamoto 1 , Osamu Iwamoto 1 , Shoji Nakamura 1 , Mariko Segawa 1 , Yosuke Toh 1
Affiliation  

ABSTRACT

The neutron capture cross sections of  244Cm and  246Cm were measured for the neutron energy range of 1–1000 eV via the neutron time-of-flight method with Accurate Neutron-Nucleus Reaction measurement Instrument (ANNRI) at Materials and Life Science Experimental Facility (MLF) of the Japan Proton Accelerator Research Complex (J-PARC). The world’s most intense neutron pulses from the Japan Spallation Neutron Source (JSNS) enable the accurate measurement of neutron capture cross sections. Besides, single-bunched neutron pulses allow the analysis in a higher neutron energy region than the previous measurement at ANNRI. The resonance analyses were performed up to 1000 eV by using a resonance shape analysis code REFIT. The spectra of prompt gamma-rays from neutron capture reactions of  244Cm and  246Cm were also obtained, and 43 and 10 prompt gamma-ray peaks from  244Cm (n,γ) and  246Cm (n,γ) reactions were newly observed, respectively.



中文翻译:

在 J-PARC 使用 ANNRI 测量锔同位素的中子俘获截面

摘要

的中子俘获截面  244C 246C在日本质子加速器研究中心的材料和生命科学实验设施 (MLF) 中,通过中子飞行时间方法和精确中子-核反应测量仪 (ANNRI) 测量了 1-1000 eV 的中子能量范围( J-PARC)。来自日本散裂中子源 (JSNS) 的世界上最强烈的中子脉冲能够准确测量中子俘获截面。此外,单束中子脉冲允许在比 ANNRI 之前的测量更高的中子能量区域中进行分析。通过使用共振形状分析代码 REFIT 进行了高达 1000 eV 的共振分析。来自中子俘获反应的瞬发伽马射线光谱 244C 246C 还获得了 43 和 10 个瞬发伽马射线峰  244C (n,γ) 和  246C (n,γ) 反应分别被新观察到。

更新日期:2021-01-04
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