Artículo
High-precision prompt-γ-ray spectral data from the reaction Pu 241 (nth, f)
Autor/es | Guerrero Sánchez, Carlos
Billnert, R. Oberstedt, S. Belgya, T. Brys, T. Geerts, W. Vidali, M. |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2014 |
Fecha de depósito | 2017-04-05 |
Publicado en |
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Resumen | In this paper we present results from the first high-precision prompt-γ-ray spectral measurements from the reaction Pu241(nth, f). Apart from one recent experiment, no data are reported in the literature for this fissioning ... In this paper we present results from the first high-precision prompt-γ-ray spectral measurements from the reaction Pu241(nth, f). Apart from one recent experiment, no data are reported in the literature for this fissioning system, which motivated a new dedicated experiment. We have measured prompt-fission γ rays with three cerium-doped LaBr3 (two 5.08cm×5.08 cm and one 7.62cm×7.62 cm) and one CeBr3 (5.08cm×5.08 cm) scintillation detectors, which all exhibit excellent timing and good energy resolution. The average γ-ray multiplicity was determined to be ν̄γ=(8.21±0.09) per fission, the average energy to be εγ=(0.78±0.01) MeV, and the total energy to be Eγ,tot=(6.41±0.06) MeV as the weighted average from all detectors. Since the results from all detectors are in excellent agreement, and the total released γ energy is modestly higher than the one in the present evaluated nuclear data files, we suspect that the underestimation of the prompt-γ heating in nuclear reactors is due to fast-neutron-induced fission on U238 or rather from fission induced by γ rays from neutron capture in the construction material. |
Agencias financiadoras | European Union (UE). FP7 |
Identificador del proyecto | 269499 |
Cita | Guerrero Sánchez, C., Billnert, R., Oberstedt, S., Belgya, T., Brys, T., Geerts, W. y Vidali, M. (2014). High-precision prompt-γ-ray spectral data from the reaction Pu 241 (nth, f). Physical Review C - Nuclear Physics, 90 (2), 024618-1-024618-6. |
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