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Isospin diffusion in semi-peripheral $^{58}Ni$+$^{197}Au$ collisions at intermediate energies (II): Dynamical simulations
E. Galichet1, 2, 3, 4, M. Colonna3, B. Borderie1, M. F. Rivet1
(06/10/2008)

We study isospin effects in semi-peripheral collisions above the Fermi energy by considering the symmetric $^{58}Ni$+$^{58}Ni$ and the asymmetric reactions $^{58}Ni$+$^{197}Au$ over the incident energy range 52-74~A~MeV. A microscopic transport model with two different parameterizations of the symmetry energy term is used to investigate the isotopic content of pre-equilibrium emission and the N/Z diffusion process. Simulations are also compared to experimental data obtained with the INDRA array and bring information on the degree of isospin equilibration observed in Ni + Au collisions. A better overall agreement between data and simulations is obtained when using a symmetry term which linearly increases with nuclear density.
1 :  IPNO - Institut de Physique Nucléaire d'Orsay
2 :  CNAM Paris - Conservatoire National des Arts et Métiers
3 :  LNS - Laboratori Nazionali del Sud
4 :  INFN, Sezione di Catania - Istituto Nazionale di Fisica Nucleare, Sezione di Catania
Physique/Physique Nucléaire Expérimentale
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