Description of isotopic fission-fragment distributions within the Langevin approach

Dynamical calculations based on the four-dimensional stochastic Langevin approach are extended to thedescription of fragment isotopic distributions in fission at moderate-to-high excitation energy. Benefiting fromprevious theoretical work on charge-asymmetry relaxation times, and existing experimental charge-dispersioncurves from low-energy fission, charge fluctuations are introduced at the scission point in an effective way.Comparison with recent suited measurements shows a good description over the full fragment production. Thedevelopment proposed in this work can easily be implemented in other codes used in the field.