The availability of radioactive heavy-ion beams has driven a large interest in studies of nuclear structure of unstable nuclei. Some essential information in this field can come from investigations of charge asymmetry effects on nonequilibrium dynamics. It is therefore very important to understand the properties of the symmetry term in the nuclear matter equation of state. The purpose of this work is to extract valuable information about the symmetry term in the nuclear equation of state by studying the multifragmentation processes occurring during intermediate-energy heavy-ion reactions. We will concentrate on those observables in fragment production that are particularly sensitive to the symmetry term. The calculations are performed within the semiclassical Boltzmann-Uehling-Uhlenbeck approach with the inclusion Of nuclear density fluctuations. We consider neutron-poor and neutron-rich Sn + Sn reactions at 50 MeV/A, with the N/Z ratio varying from 1.24 to 1.48. Both central and peripheral collisions are investigated. Some comparison with the experimental data obtained in the National Superconducting Cyclotron Laboratory at Michigan State University is presented. (C) 2003 MAIK "Nauka/Interperiodica". RI Baran, Virgil/A-8259-2011
Isospin effects in nuclear fragmentation
GRECO, VINCENZO;
2003-01-01
Abstract
The availability of radioactive heavy-ion beams has driven a large interest in studies of nuclear structure of unstable nuclei. Some essential information in this field can come from investigations of charge asymmetry effects on nonequilibrium dynamics. It is therefore very important to understand the properties of the symmetry term in the nuclear matter equation of state. The purpose of this work is to extract valuable information about the symmetry term in the nuclear equation of state by studying the multifragmentation processes occurring during intermediate-energy heavy-ion reactions. We will concentrate on those observables in fragment production that are particularly sensitive to the symmetry term. The calculations are performed within the semiclassical Boltzmann-Uehling-Uhlenbeck approach with the inclusion Of nuclear density fluctuations. We consider neutron-poor and neutron-rich Sn + Sn reactions at 50 MeV/A, with the N/Z ratio varying from 1.24 to 1.48. Both central and peripheral collisions are investigated. Some comparison with the experimental data obtained in the National Superconducting Cyclotron Laboratory at Michigan State University is presented. (C) 2003 MAIK "Nauka/Interperiodica". RI Baran, Virgil/A-8259-2011I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
