https://doi.org/10.1051/epjconf/20111709003
Beyond mean-field approach to heavy-ion reactions around the Coulomb barrier
1
PNTPM, CP229, Université Libre de
Bruxelles, 1050
Bruxelles,
Belgium
2
GANIL, BP55027, 14076
Caen,
France
3
Physics Department, Tennessee Technological
University, Cookeville, Tennessee
38505,
USA
4
Physics Department, Ankara University,
Tandogan
06100, Ankara,
Turkey
a e-mail: kouhei.washiyama@ulb.ac.be
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 meanfield 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.
© Owned by the authors, published by EDP Sciences, 2011