HAL : hal-00347271, version 1

arXiv : 0812.2786

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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

Domaine

:

Physique/Physique Nucléaire Expérimentale

hal-00347271, version 1

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Contributeur : Marie-France Rivet <>

Soumis le : Lundi 15 Décembre 2008, 13:05:52

Dernière modification le : Jeudi 18 Décembre 2008, 10:30:21