Fission modelling with FIFRELIN

摘要: The nuclear fission process gives rise to the formation of fragments and emission particles \( (n,\gamma , e^{-})\) . particle from can be prompt delayed. We present here methods used in FIFRELIN code, which simulates component de-excitation process. are based on phenomenological models associated with macroscopic and/or microscopic ingredients. Input data provided by experiment as well theory. fragment performed within Weisskopf (uncoupled neutron gamma emission) or a Hauser-Feshbach (coupled neutron/gamma statistical usually consider five free parameters that cannot theory experiments order describe initial distributions required code. In first step this set is chosen reproduce very limited target observables. second we increase statistics predict all other observables such neutron, conversion electron spectra but also their function any kind as, for instance, number distributions, average multiplicity mass, charge kinetic energy, so on. Several results related different fissioning systems presented work. goal next decade will i) replace some ingredients calculations when available reliable, ii) support experimentalists design detection prediction necessary beam time count rates measuring emitted coincidence iii) extend model able run calculation no experimental input available, iv) account multiple chance before fission, v) scission neutrons. efforts have already been made phenomenology various parameter libraries electric dipole photon strength functions HFB level densities. First relative theses aspects