Dipolar degrees of freedom and Isospin equilibration processes in Heavy Ion collisions
Abstract
Background: In heavy ion collision at the Fermi energies Isospin equilibration processes occur- ring when nuclei with different charge/mass asymmetries interacts have been investigated to get information on the nucleon-nucleon Iso-vectorial effective interaction. Purpose: In this paper, for the system 48Ca +27 Al at 40 MeV/nucleon, we investigate on this process by means of an observable tightly linked to isospin equilibration processes and sensitive in exclusive way to the dynamical stage of the collision. From the comparison with dynamical model calculations we want also to obtain information on the Iso-vectorial effective microscopic interaction. Method: The average time derivative of the total dipole associated to the relative motion of all emitted charged particles and fragments has been determined from the measured charges and velocities by using the 4? multi-detector CHIMERA. The average has been determined for semi- peripheral collisions and for different charges Zb of the biggest produced fragment. Experimental evidences collected for the systems 27Al+48Ca and 27Al+40Ca at 40 MeV/nucleon used to support this novel method of investigation are also discussed.
Keywords
Cite
@article{arxiv.1501.00801,
title = {Dipolar degrees of freedom and Isospin equilibration processes in Heavy Ion collisions},
author = {M. Papa and I. Berceanu and L. Acosta and F. Amorini and C. Agodi and A. Anzalone and L. Auditore and G. Cardella and S. Cavallaro and M. B. Chatterjee and E. De Filippo and L. Francalanza and E. Geraci and L. Grassi and B. Gnoffo and J. Han and E. La Guidara and G. Lanzalone and I. Lombardo and C. Maiolino T. Minniti A. Pagano and E. V. Pagano and S. Pirrone and G. Politi and F. Porto and L. Quattrocchi and F. Rizzo and E. Rosato and P. Russotto and A. Trifirò and M. Trimarchi and G. Verde and M. Vigilante},
journal= {arXiv preprint arXiv:1501.00801},
year = {2019}
}
Comments
Submitted for publication on Phys. Rev. C. 0n 24-oct-2014