Prompt Fission Neutrons and Gamma Rays in a Monte Carlo Hauser-Feshbach Formalism

Prompt fission neutrons and γ rays are calculated in the framework of the statistical Hauser-Feshbach formalism applied to the decay of excited primary fission fragments, and implemented in a Monte Carlo approach in the CGMF code. Distributions, cor- relations and exclusive data on neutrons and γ rays are inferred, in addition to the more commonly assessed average spectrum and multiplicity. Questions related to the initial conditions that characterize the fission fragment configurations in deformation, excitation energy, spin and parity, are discussed at some length, and their impact on computed solutions are reviewed. The case of 252Cf spontaneous fission is used to illustrate typical results obtained in this framework.