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

par Washiyama, Kohei ;Lacroix, Denis;Ayik, Sakir;Yilmaz, Bülent
Référence EPJ web of conferences, 17, 09003
Publication Publié, 2011-10

Article révisé par les pairs

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Résumé :

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.