241Am Neutron Capture Cross Section Measurement using the NaI(Tl) spectrometer of the ANNRI beamline of J-PARC

被引：1
|
作者：
Rovira, Gerard [1 ,3 ]
Kimura, Atsushi [1 ]
Nakamura, Shoji [1 ]
Endo, Shunsuke [1 ]
Iwamoto, Osamu [1 ]
Iwamoto, Nobuyuki [1 ]
Katabuchi, Tatsuya [2 ]
Kodama, Yu [2 ]
Nakano, Hideto [2 ]
Sato, Yaoki [2 ]
机构：
[1] Japan Atom Energy Agcy, Nucl Sci & Engn Ctr, Ibaraki, Japan
[2] Tokyo Inst Technol, Inst Innovat Res, Lab Zero Carbon Energy, Tokyo, Japan
[3] Japan Atom Energy Agcy, Nucl Sci & Engn Ctr, 2-4 Shirakata, Tokai, Ibaraki 3191195, Japan
来源：
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY | 2024年 / 61卷 / 04期
关键词：
ANNRI; Am-241; neutron capture cross section; J-PARC; MLF; minor actinide; neutron time-of-flight; resonance analysis; thermal cross section; UNCERTAINTY ANALYSIS; RESONANCE INTEGRALS; MINOR-ACTINIDE; CODE SYSTEM; FISSION; LIBRARY;
D O I：
10.1080/00223131.2023.2239885
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The neutron capture cross-section of Am-241 was measured from 10 meV to about 500 keV using the NaI(Tl) spectrometer of the Accurate Neutron-Nucleus Reaction Measurement Instrument (ANNRI) beamline in the Materials and Life Science Experimental Facility (MLF) of the Japan Proton Accelerator Research Complex (J-PARC). The total energy detection principle was applied in conjunction with the pulse-height weighting technique to derive the neutron capture yield. The present cross-section results were normalized using a Au-197 sample measurement by applying the saturated resonance method. The thermal cross section was measured to be 708 & PLUSMN; 22 b, in agreement with the evaluation in JENDL-5 of 709 b within uncertainties. In the keV region, the evaluated libraries of JENDL-5, ENDF/B-VIII.0 and JEFF-3.3 are in good agreement with the present results over 10 keV but show values lower by 30% to 70% below that energy. Moreover, the results of a resonance shape analysis of the resolved resonance region are also provided in the present paper.
引用
收藏
页码：459 / 477
页数：19
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