Beyond mean-ﬁeld approach to heavy-ion reactions around the Coulomb barrier
PNTPM, CP229, Université Libre de
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: email@example.com
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