Study of fission fragment de-excitation by gamma-ray spectrometry with the EXILL experiment
1 Irfu, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
2 CEA, DEN, DER, Cadarache, 13108 Saint-Paul-lez-Durance, France
3 Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warszawa, Poland
4 Institut Laue Langevin, 71 av. des Martyrs, 38042 Grenoble Cedex 9, France
5 LPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, 38026 Grenoble Cedex, France
6 INFN, Legnaro, Italy
7 Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, BP. 55027, 14076 Caen Cedex 5, France
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Published online: 13 September 2017
A large array of Ge detectors installed at ILL, around a 235U target irradiated with cold neutrons, (EXILL) allowed measurement of prompt gamma-ray cascades occurring in fission fragments with an unambiguous determination of fragments. Here we present preliminary results of a systematic comparison between experimental γ-ray intensities and those obtained from the Monte-Carlo simulation code FIFRELIN, which is dedicated to the de-excitation of fission fragments. Major γ-ray intensities in the 142Ba and 92Kr fission products, extracted from EXILL data, were compared to FIFRELIN, as well as to reported values (when available) obtained with EUROGAM2 in the spontaneous fission of 248Cm. The evolution of γ-ray intensities in 92Kr versus the complementary partner in fission (i.e. versus the total number of evaporated neutrons by the fission pair) was then extracted and compared to FIFRELIN.
© The Authors, published by EDP Sciences, 2017
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