Description of the mass and kinetic-energy distributions of fission fragments using an adiabatic potential

The mass distributions of fission fragments from rotating composite nuclear systems with parameters Z2/A > 40 have been calculated in the framework of the diffusion model based on the Fokker-Planck equation for the distribution function of the collective variables. In this formalism the two-body nuclear viscosity coefficient describing the intensity of the dissipative forces is the only free parameter. It has been found that the consideration of the angular momenta of the fissile nuclei leads to a small increase in the calculated widths which slightly improves the agreement with the experimental data. In addition, the fission fragment kinetic-energy distributions have been calculated and compared with the measured ones