Beyond mean-field approach to heavy-ion reactions around the Coulomb barrier

Details Beyond mean-field approach to heavy-ion reactions around the Coulomb barrier Beyond mean-field approach to heavy-ion reactions around the Coulomb barrier

2011-09-28

arxiv.org/abs/1109.6255v1

Physics

Nuclear Physics

Nuclear Theory

6 pages, 6 figures. A talk given at the FUSION11, May 2-6, 2011, Saint-Malo, France

Scientific paper

Dissipation and fluctuations of one-body observables in heavy-ion reactions around the Coulomb barrier are investigated with a microscopic stochastic mean-field approach. By projecting the stochastic mean-field dynamics on a suitable collective path, transport coefficients associated with the relative distance between colliding nuclei and a fragment mass are extracted. Although microscopic mean-field approach is know to underestimate the variance of fragment mass distribution, the description of the variance is much improved by the stochastic mean-field method. While fluctuations are consistent with the empirical (semiclassical) analysis of the experimental data, concerning mean values of macroscopic variables the semiclassical description breaks down below the Coulomb barrier.

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