Isospin diffusion in 58Ni-induced reactions at intermediate energies

Abstract : Isospin diffusion is probed as a function of the dissipated energy by studying two systems $^{58}$Ni+$^{58}$Ni and $^{58}$Ni+$^{197}$Au, over the incident energy range 52-74\AM. Experimental data are compared with the results of a microscopic transport model with two different parameterizations of the symmetry energy term. A better overall agreement between data and simulations is obtained when using a symmetry term with a potential part linearly increasing with nuclear density. The isospin equilibration time at 52~\AM{} is estimated to 130$\pm$10~fm/$c$.
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E. Galichet, Marie-France Rivet, B. Borderie, M. Colonna, R. Bougault, et al.. Isospin diffusion in 58Ni-induced reactions at intermediate energies. International workshop on nuclear dynamics in heavy-ion reactions and the symmetry energy, Aug 2009, Shanghai, China. pp.1534, ⟨10.1142/S021830131001593X⟩. ⟨in2p3-00461302⟩

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