EPJ Web of Conferences (Jan 2017)

Study of fission fragment de-excitation by gamma-ray spectrometry with the EXILL experiment

  • Materna Thomas,
  • a Michal Rapał,
  • Letourneau Alain,
  • Marchix Anthony,
  • Litaize Olivier,
  • Sérot Olivier,
  • Urban Waldemar,
  • Blanc Aurélien,
  • Jentschel Michael,
  • Köster Ulli,
  • Mutti Paolo,
  • Soldner Torsten,
  • Simpson Gary,
  • Ur Călin A.,
  • France Gilles de

DOI
https://doi.org/10.1051/epjconf/201714604041
Journal volume & issue
Vol. 146
p. 04041

Abstract

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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.