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.

10 pages. 6 figures. Submitted to Physical Review C

References in corpus (5)

• Nuclear multifragmentation and phase transition for hot nuclei
• The influence of cluster emission and the symmetry energy on neutron-proton spectral double ratios
• Isospin diffusion in semi-peripheral ${}^{58}Ni$ + ${}^{197}Au$ collisions at intermediate energies (II): Dynamical simulations
• A new approach to solve the Boltzmann-Langevin equation for fermionic systems
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Cited by in corpus (3)

• 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