Investigation of n+²³⁸U fission observables

The prompt fission observables related to the ²³⁸U(n,f) reaction were investigated through a Monte Carlo simulation. Two models were tested in the FIFRELIN Monte Carlo code to simulate the deexcitation of the primary fission fragments. In the first one, prompt neutrons are emitted before prompt gammas and a Weisskopf model is used for neutrons while a level-density plus gamma strength function statistical model is used for gammas. In the second one, an Hauser-Feshbach statistical model is used for the n/γ coupled emission using neutron-transmission coefficients provided by TALYS-1.4 and gamma-transmission coefficients calculated as in the previous model. (authors)