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

页码：459 / 477

页数：19

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