Monte Carlo approach to sequential γ-ray emission from fission fragments -: art. no. 014602

A Monte Carlo simulation of the fission fragment statistical decay based on a sequential neutron followed by gamma-ray emission is proposed. The gamma-ray energy spectrum is calculated as a function of the mass of the fission fragments and integrated over the whole mass distribution. The prompt gamma-ray multiplicity distribution, both the average number of emitted gamma rays and the average gamma-ray energy as a function of the mass of the fission fragments [respectively, (N) over bar (gamma)(A) and <epsilon(gamma)>(A)], are also assessed. The gamma-gamma correlations emitted from both light and heavy fragments are calculated as well as correlations between gamma-ray energies. Results are reported for the neutron-induced fission of U-235 (at 0.53 MeV neutron energy) and for the spontaneous fission of Cf-252.