C. Ciampi, PRC 106, 024603

Ciampi, C. and Piantelli, S. and Casini, G. and Pasquali, G. and Quicray, J. and Baldesi, L. and Barlini, S. and Borderie, B. and Bougault, R. and Camaiani, A. and Chbihi, A. and Dell’Aquila, D. and Cicerchia, M. and Duenas, J. A. and Fable, Q. and Fabris, D. and Frankland, J. D. and Frosin, C. and G\énard, T. and Gramegna, F. and Gruyer, D. and Henri, M. and Hong, B. and Kim, S. and Kordyasz, A. and Kozik, T. and Kweon, M. J. and Lemarié, J. and Le Neindre, N. and Lombardo, I. and Lopez, O. and Marchi, T. and Nam, S. H. and Ordine, A. and Ottanelli, P. and Park, J. and Park, J. H. and Pârlog, M. and Poggi, G. and Rebillard-Soulié, A. and Stefanini, A. A. and Upadhyaya, S. and Valdré, S. and Verde, G. and Vient, E. and Vigilante, M. (INDRA-FAZIA Collaboration)

Phys. Rev. C 106, 024603

An investigation of the isospin equilibration process in the reactions 58,64Ni+58,64Ni at two bombarding energies in the Fermi regime (32 and 52 MeV/nucleon) is presented. Data have been acquired during the first experimental campaign of the coupled INDRA-FAZIA apparatus in GANIL. Selecting from peripheral to semicentral collisions, both the neutron content of the quasiprojectile residue and that of the light ejectiles coming from the quasiprojectile evaporation have been used as probes of the dynamical process of isospin diffusion between projectile and target for the asymmetric systems. The isospin transport ratio technique has been employed. The relaxation of the initial isospin imbalance with increasing centrality has been clearly evidenced. The isospin equilibration appears stronger for the reactions at 32 MeV/nucleon, as expected due to the longer projectile-target interaction time than at 52 MeV/nucleon. Coherent indications of isospin equilibration come from the quasiprojectile residue characteristics and from particles ascribed to the quasiprojectile decay.

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• Tags:
• Indra-Fazia
• Ganil
• Isospin Diffusion