The transport coefficient of collective motion within the two-center shell model shape parameterization

The transport coefficients of large-scale nuclear collective motion (potential energy, tensors of friction and mass) used in the description of fission process or fusion-fission reactions with the help of Langevin equations are calculated within the two-center shell-model shape parameterization. The transport coefficients are defined both in the macroscopic (wall formula for friction and Werner-Wheeler approximation for the mass tensor) and microscopic (linear response theory and local harmonic approximation) approaches. It is shown that at low excitation energy, the macroscopic and microscopic quantities differ substantially in dependence both on deformation and temperature. Thus, the microscopic effect in transport coefficients should be taken in account by the description of low-energy nuclear collisions and fission process.