Prompt fission gamma-ray spectra characteristics - systematics and predictions
Paper in proceedings, 2015

Revised systematics for prompt fission gamma-ray spectra (PFGS) characteristics as function of both atomic and mass number of the compound system, derived from recent experiments on thermal-neutron induced and spontaneous fission, is presented and applied to fission induced by fast neutrons. Results from these calculations for U-238(n, f) and U-235(n, f) for incident neutron energies from 0 to 20 MeV are compared to new experimental results, exhibiting nice agreement. Very recent PFGS measurements for Pu-240(sf) and Pu-242(sf) have been evaluated and the determined PFGS characteristics are shown to also fit well with the systematics. From this we conclude that the obtained systematics, although purely empirical, is indeed a useful tool for the prediction of average total gamma-ray energy released in prompt fission, mean energy per photon as well as average photon multiplicity for fissioning systems, which are difficult or even impossible to study experimentally. (C) 2015 The Authors. Published by Elsevier B.V.


prompt gamma-ray multiplicity






neutron-induced fission

total gamma-ray energy

Prompt fission gamma-rays



Andreas Oberstedt

Chalmers, Fundamental Physics

P. Halipré

Institut de Physique Nucleaire Orsay

F. J. Hambsch

EU Joint Research Centre (JRC)

M. Lebois

Institut de Physique Nucleaire Orsay

S. Oberstedt

EU Joint Research Centre (JRC)

J. Wilson

Institut de Physique Nucleaire Orsay

Physics Procedia

18753884 (ISSN) 18753892 (eISSN)

Vol. 64 91-100

Subject Categories

Physical Sciences



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