Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1999-04-13
Nucl.Phys.A652:164-185,1999
Physics
Nuclear Physics
Nuclear Theory
30 pages, including 14 eps-figures, UGI-99-08, submitted to Nucl. Phys. A
Scientific paper
10.1016/S0375-9474(99)00165-7
The dynamical description of correlated nuclear motion is based on a set of coupled equations of motion for the one-body density matrix $\rho (11';t)$ and the two-body correlation function $c_2(12,1'2';t)$, which is obtained from the density-matrix hierarchy beyond conventional mean-field approaches by truncating 3-body correlations. The resulting equations nonperturbatively describe particle-particle collisions (short-range correlations) as well as particle-hole interactions (long-range correlations). Within a basis of time-dependent Hartree-Fock states these equations of motion are solved for collective vibrations of $^{40}Ca$ at several finite thermal excitation energies corresponding to temperatures $T=0-6$ MeV. Transport coefficients for friction and diffusion are extracted from the explicit solutions in comparison to the solutions of the associated TDHF, VUU, Vlasov or damped quantum oscillator equations of motion. We find that the actual magnitude of the transport coefficients is strongly influenced by partlicle-hole correlations at low temperature which generate large fluctuations in the nuclear shape degrees of freedom. Thermodynamically, the specific heat and the entropy of the system as a function of temperature does not differ much from the mean-field limit except for a bump in the specific heat around $T\simeq 4$ MeV which we attribute to the melting of shell effects in the correlated system.
Cassing Wolfgang
Luo Hong-Gang
Wang Shun-Jin
No associations
LandOfFree
Damping of Collective Nuclear Motion and Thermodynamic Properties of Nuclei beyond Mean Field does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Damping of Collective Nuclear Motion and Thermodynamic Properties of Nuclei beyond Mean Field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Damping of Collective Nuclear Motion and Thermodynamic Properties of Nuclei beyond Mean Field will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-123022