Orateur
M.
Michal Rapala
(CEA Saclay/IRFU/DPhN/LERN)
Description
The poor accuracy of microscopic models in the prediction of fission observables constrains nuclear industry to rely on semi-empirical models, which in turns need systematic and accurate experimental data on a significant number of observables. In the last decade, large efforts were made in the fission community to improve models of the fission process and of the de-excitation of fission fragments. This is performed through reliable Monte Carlo simulations that take into account prompt neutrons and gamma-ray emission. An ultimate aim of such a simulation is to predict e.g. gamma-heating effect in nuclear reactor. The FIFRELIN code developed by CEA Cadarache is able to estimate the intensities of gamma-ray transitions in all the fission fragments.
In the EXILL experiment conducted in 2012 and 2013 at ILL, a target made of 235U (and also 241Pu, which was not investigated in this work) was surrounded by an array of high-resolution, germanium gamma-ray detectors and irradiated by an intense cold neutrons beam. We have extracted the intensities of the main discrete gamma-ray transitions in a set of fission fragments, using the triple gamma-ray coincidence technique, and we have compared our results to FIFRELIN outputs. The result of our study on the gamma-ray cascades in Kr and Ba fragment pairs will be presented.
Auteur principal
M.
Michal Rapala
(CEA Saclay/IRFU/DPhN/LERN)
Co-auteurs
Alain Letourneau
(CEA, DRF, IRFU, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France)
Aurélien Blanc
(Institut Laue Langevin (ILL), F-38042 Grenoble Cedex 9, France)
Gary Simpson
(LPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, F-38026 Grenoble Cedex, France)
Gilles De France
(Grand Accélérateur National d’Ions Lourds (GANIL), F-14076 Caen Cedex 5, France)
Michael Jentschel
(Institut Laue Langevin (ILL), F-38042 Grenoble Cedex 9, France)
Olivier Litaize
(CEA, DEN, DER, Cadarache, F-13108 Saint-Paul-lez-Durance, France)
Olivier Serot
(CEA, DEN, DER, Cadarache, F-13108 Saint-Paul-lez-Durance, France)
Paolo Mutti
(Institut Laue Langevin (ILL), F-38042 Grenoble Cedex 9, France)
Silvia Leoni
(INFN, 35020 Legarno, Italy)
Thomas Materna
(CEA, DRF, IRFU, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France)
Torsten Soldner
(Institut Laue Langevin (ILL), F-38042 Grenoble Cedex 9, France)
Ulli Koester
(Institut Laue Langevin (ILL), F-38042 Grenoble Cedex 9, France)
Waldemar Urban
(Faculty of Physics, University of Warsaw, PL-02-093 Warszawa, Poland)
