New isospin e ffects in central heavy-ion collisions at Fermi energies

Abstract

Isospin e ffects on multifragmentation properties were studied thanks to nuclear collisions between di fferent isotopes of xenon beams and tin targets. It is shown that, in central collisions leading to multifragmentation, the mean number of fragments and their mean kinetic energy increase with the neutron-richness of the total system. Comparisons with a stochastic transport model allow to attribute the multiplicity increase to the multifragmentation stage, before secondary decay. The total charge bound in fragments is proposed as an alternate variable to quantify preequilibrium emission and to investigate symmetry energy e ffects.

arXiv comment10 pages. 6 figures. Submitted to Physical Review C

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Cited by in corpus (12)

• Bifurcations in Boltzmann-Langevin One Body dynamics for fermionic systems
• Collision dynamics at medium and relativistic energies
• Investigation of collective radial expansion and stopping in heavy ion collisions at Fermi energies
• Isospin effects and symmetry energy studies with INDRA
• Experimental reconstruction of primary hot isotopes and characteristic properties of the fragmenting source in the heavy ion reactions near the Fermi energy
• Reconstructed primary fragments and symmetry energy, temperature and density of the fragmenting source in ${}^{64}$Zn + ${}^{112}$Sn at 40 MeV/nucleon
• Inhomogeneity growth in two-component fermionic systems
• Pairing effects on spinodal decomposition of asymmetric nuclear matter
• Bifurcations in dissipative fermionic dynamics
• Statistical analysis of experimental multifragmentation events in ${}^{64}$Zn + ${}^{112}$Sn at 40 MeV/nucleon
• Cluster formation in nuclear reactions from mean-field inhomogeneities
• Sequential fissions of heavy nuclear systems