A C-code for combining a Langevin fission dynamics of hot nuclei with a statistical model including evaporation of light particles and giant dipole γ-quanta

Abstract

We present a C-code calculating the decay of highly excited and rotating atomic nuclei by fission and light particle (neutrons, protons, α-particles, giant dipole γ-quanta) evaporation. The program calculates the distributions of the relevant observables, their averages, variances and correlations. The most important output parameters are: fission (respectively survival) probabilities, pre-scission neutron and charged-particle multiplicities and spectra, pre-scission gamma-multiplicities and spectra, average energies of these particles, scission lifetime distributions, and excitation energies at scission. For this purpose a dynamical Langevin equation for an overdamped fission process is combined with a statistical model description. In the dynamical part of the model the evaporation of light particles and giant dipole γ-quanta is accounted for by coupling a Monte Carlo algorithm to the fission dynamics. In the statistical part of the model a fission width consistent with the dynamical description is used besides the standard way of calculating the light particle emission. The code provides also the possibility to investigate the influence of different nuclear friction form factors on the observable quantities.