$^{241}$ Am neutron capture cross section measurement using the NaI(Tl) spectrometer of the ANNRI beamline of J-PARC

Rovira Leveroni, G. ; Kimura, Atsushi ; Nakamura, Shoji ; Endo, Shunsuke ; Iwamoto, Osamu ; Iwamoto, Nobuyuki ; Katabuchi, Tatsuya*; Kodama, Yu*; Nakano, Hideto*; Sato, Yaoki*

The neutron capture cross-section of $^{241}$ Am was measured from 10 meV to about 1 MeV using the NaI(Tl) spectrometer of the Accurate Neutron-Nucleus Reaction Measurement Instrument (ANNRI) beamline in the Materials and Life Science (MLF) facility 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 $^{197}$ Au sample measurement by applying the saturated resonance method. The thermal cross section was measured to be 708 22 b, in agreement within uncertainties to the present evaluation in JENDL-5 of 709 b. Moreover, the results of a shape resonance analysis of the resolved resonance region are also provided in the present dissertation.

Language	:	English
Journal	:	Journal of Nuclear Science and Technology
Volume	:	61
Number	:	4
Pages	:	p.459 - 477
Publication Year/Month	:	2024/04
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Paper URL	:	https://doi.org/10.1080/00223131.2023.2239885
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Article of JAEA R&D Review	:	Towards Developing Minor Actinides Transmutation Systems; Improving the Accuracy of the Experimental Nuclear Data for $^{241}$ Am at J-PARC[]
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Registration No. : AA20230042
JAEA Abstracts No. : 52000808
Paper Submission No. : 28225

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