Artículo
Measurement of the 236U(n,f) cross section from 170 meV to 2 MeV at the CERN n_TOF facility
Autor/es | Sarmento, Raul
Calviani, M. Praena Rodríguez, Javier Colonna, Nicola Belloni, F. Gonçalves, I. F. Wisshak, K. Capote, Roberto Lozano Leyva, Manuel Luis Quesada Molina, José Manuel |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2011 |
Fecha de depósito | 2017-04-05 |
Publicado en |
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Resumen | 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 ... 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. |
Agencias financiadoras | European Commission (EC) |
Identificador del proyecto | FIKW-CT-2000-00107 |
Cita | Sarmento, R., Calviani, M., Praena Rodríguez, J., Colonna, N., Belloni, F., Gonçalves, I.F.,...,Quesada Molina, J.M. (2011). Measurement of the 236U(n,f) cross section from 170 meV to 2 MeV at the CERN n_TOF facility. Physical Review C - Nuclear Physics, 84 (4), 044618-1-044618-10. |
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