Neutron capture and total cross-section measurements and resonance parameter analysis of niobium-93 below 400 eV

Endo, Shunsuke; Kimura, A.; Nakamura, Shôji; Iwamoto, Osamu; Iwamoto, Nobuyuki; Rovira, Gerard; Terada, Kikuo; Meigo, Shin-ichiro; Toh, Y.; Segawa, M.; Maeda, Makoto; Tsuneyama, Masayuki

doi:10.1080/00223131.2021.1970040

Cited by 10 publications

(6 citation statements)

References 22 publications

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“…The function had already been applied to the resonance analysis code REFIT [10,13], which enabled us to have a number of experiences on the resonance analysis (The most recent work is found in Ref. [14]). Recently, those works were followed by one of the authors and the function was incorporated into AMUR.…”

Section: Resolution Functionmentioning

confidence: 99%

“…Quite recently, some of the authors measured transmission and (n,γ) cross-sections on 93 Nb [14] at J-PARC/MLF. This measurement is one of the good practices for the updated version of AMUR because of reasons as follows.…”

Section: Experimental Data To Be Analyzedmentioning

confidence: 99%

“…Among a number of the approximated resonance formulae which are stemmed from the R-matrix theory, we adopted the Reich-Moore type (ENDF-6/MF=2/LRF=3) to calculate/reconstruct the cross-sections, as a first step of AMUR being applied to heavier nuclei. Initial of the resonance parameter set was taken from the preceding work by Endo et al [14] in which parameter values had been obtained from the same measurements with the modified REFIT code that accommodates to the double-bunching issue.…”

Section: Prior Parameters and Covariancesmentioning

confidence: 99%

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Updates to the AMUR code for R-matrix analyses on heavy nuclei

Kunieda

Endo²,

Kimura³

2023

EPJ Web Conf.

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The AMUR code, that had been initially designed for R-matrix analysis on light nuclei, was updated to perform resonance analyses on heavy nuclei by including approximated theories with experimental corrections such as resolution function. As a feasibility study, we tested these updates by performing a covariance analysis on J-PARC/ANNRI measured data for n+93Nb reactions. In this work we present preliminary results obtained from the fitting procedure including both R-matrix resonance parameters and parameters related to the experimental corrections. We also discuss about physical constraint from the theory for forthcoming in-depth analysis to the measurements.

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Section: Resolution Functionmentioning

confidence: 99%

Section: Experimental Data To Be Analyzedmentioning

confidence: 99%

Section: Prior Parameters and Covariancesmentioning

confidence: 99%

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Updates to the AMUR code for R-matrix analyses on heavy nuclei

Kunieda

Endo²,

Kimura³

2023

EPJ Web Conf.

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“…AMUR was applied to the evaluation on a number of light nuclei for development of the neutron sub-library JENDL-5. Among those isotopes, let me focus on the evaluation of n+ 19 F cross sections as an example. The measured cross sections analyzed are taken from the EXFOR database [6] and they are listed in Table 1.…”

Section: Example Analysis On Light Nuclei : N+ 19 Fmentioning

confidence: 99%

“…For the heavier nuclei, a preliminary analysis is presented ⇤ e-mail: kunieda.satoshi@jaea.go.jp Table 1. Measured cross sections used in the R-matrix analysis for n+ 19 F where the angular distribution data are marked with †.…”

Section: Introductionmentioning

confidence: 99%

Present status of an R-matrix analysis code AMUR for cross-section evaluation in resolved resonance region

Kunieda

2023

EPJ Web of Conf.

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An R-matrix analysis code AMUR is being progressed in terms of the correction on the experimental conditions to the theoretical calculations. In this work, new broadening options are presented both for cross-sections and angular distribution with given energy resolution. The code is also under development to analyze the J-PARC/ANNRI measurement with the double-bunch mode. In the final part, let me focus on understanding of the R-matrix theory itself, in which a role of distant poles is discussed in the simultaneous analysis of the same compound nucleus.

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