Selfconsistent transport coefficients for average collective motion at moderately high temperatures
Abstract
Linear response theory is applied to compute the coefficients for inertia, friction and local stiffness for slow, large scale nuclear collective motion. It is shown how these coefficients can be defined within a locally harmonic approximation. The latter allows to study the implications arising from a finite local collective frequency. It is only for temperatures around 2 MeV that the zero frequency limit becomes a fair approximation. Friction is found to have a marked temperature dependence. The numerical computations are performed on the basis of a twocenter shell model, but allowing the particles and holes to become dressed through effects of the medium. The dependence of the transport coefficients on the parameters of these selfenergies is studied. It is argued that the uncertainties are smaller than a factor of 2.
 Publication:

Nuclear Physics A
 Pub Date:
 December 1987
 DOI:
 10.1016/03759474(87)900753
 Bibcode:
 1987NuPhA.475..487Y