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5th International Conference FUSION11, Saint Malo : France (2011)
Beyond mean-field approach to heavy-ion reactions around the Coulomb barrier
K. Washiyama, D. Lacroix1, S. Ayik, B. Yilmaz

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 un- derestimate 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.
1 :  GANIL - Grand Accélérateur National d'Ions Lourds
Physique/Physique Nucléaire Théorique
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