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High accuracy, high resolution 235U(n,f) cross section from n_TOF (CERN) from 18 meV to 10 keV

Mastromarco, M.; Amaducci, S. ; Colonna, N.; Finocchiaro, P.; Cosentino, L.; Barbagallo, M.; Aberle, O.; Andrzejewski, J.; Audouin, L.; Bacak, M.; Balibrea, J.; Bečvář, F.; Berthoumieux, E.; Billowes, J.; Bosnar, D.; Brown, A.; Caamaño, M.; Calviño, F.; Calviani, M.; ... mehr

Abstract:

The $^{235}$U(n,f) cross section was measured in a wide energy range (18 meV–170 keV) at the n_TOF facility at CERN, relative to $^{6}$Li(n,t) and $^{10}$B(n,α) standard reactions, with high resolution and accuracy, with a setup based on a stack of six samples and six silicon detectors placed in the neutron beam. In this paper we report on the results in the region between 18 meV and 10 keV neutron energy. A resonance analysis has been performed up to 200 eV, with the code SAMMY. The resulting fission kernels are compared with the ones extracted on the basis of the resonance parameters of the most recent major evaluated data libraries. A comparison of the n_TOF data with the evaluated cross sections is also performed from thermal to 10 keV neutron energy for the energy-averaged cross section in energy groups of suitably chosen width. A good agreement, within 0.5%, is found on average between the new results and the latest evaluated data files ENDF/B-VIII.0 and JEFF-3.3, as well as with respect to the broad group average fission cross section established in the framework of the standard working group of IAEA (the so-called reference file). ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000150373
Veröffentlicht am 08.09.2022
Originalveröffentlichung
DOI: 10.1140/epja/s10050-022-00779-7
Scopus
Zitationen: 1
Web of Science
Zitationen: 2
Dimensions
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Zukunftscampus (CAMPUS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1434-6001, 1434-601X
KITopen-ID: 1000150373
Erschienen in The European Physical Journal A
Verlag Springer Verlag
Band 58
Heft 8
Seiten Art.-Nr.: 147
Vorab online veröffentlicht am 13.08.2022
Nachgewiesen in Dimensions
Web of Science
Scopus
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