Título:
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Measurement of the 236U(n, f ) cross section from 170 meV to 2 MeV at the CERN n TOF facility
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Autor/a:
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Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear; Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions |
Abstract:
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The neutron-induced fission cross section of 236U was measured at the neutron Time-of-Flight (n TOF) facility
at CERN relative to the standard 235U(n,f ) cross section for neutron energies ranging from above thermal to
several MeV. The measurement, covering the full range simultaneously, was performed with a fast ionization
chamber, taking advantage of the high resolution of the n TOF spectrometer. The n TOF results confirm that
the first resonance at 5.45 eV is largely overestimated in some nuclear data libraries. The resonance triplet
around 1.2 keV was measured with high resolution and resonance parameters were determined with good
accuracy. Resonances at high energy have also been observed and characterized and different values for the
cross section are provided for the region between 10 keV and the fission threshold. The present work indicates
various shortcomings of the current nuclear data libraries in the subthreshold region and provides the basis for an
accurate re-evaluation of the 236U(n,f ) cross section, which is of great relevance for the development of emerging
or innovative nuclear reactor technologies. |
Materia(s):
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-Àrees temàtiques de la UPC::Energies::Energia nuclear -Neutrons -Nuclear reactors -Neutrons -Energia nuclear |
Derechos:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Tipo de documento:
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Artículo - Versión publicada Artículo |
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