Fragment isospin distributions and the phase diagram of excited nuclear systems

Abstract

Fragment average isospin distributions are investigated within a microcanonical multifragmentation model in different regions of the phase diagram. The results indicate that in the liquid phase $<N/Z>$ versus $Z$ is monotonically increasing, in the phase coexistence region it has a rise and fall shape and in the gas phase it is constant. Deviations from this behavior may manifest at low fragment multiplicity as a consequence of mass/charge conservation. Characterization of the "free" and "bound" phases function of fragment charge reconfirms the neutron enrichment of the "free" phase with respect to the "bound" one irrespectively the localization of the multifragmentation event in the phase diagram.

23 pages, 12 figures

References in corpus (9)

• Isospin fractionation and isoscaling in dynamical nuclear collisions
• Isospin effects in Nuclear Fragmentation
• Isotopic Scaling of Heavy Projectile Residues from the collisions of 25 MeV/nucleon 86Kr with 124Sn, 112Sn and 64Ni, 58Ni
• Distribution of the largest fragment in the Lattice Gas Model
• The influence of Coulomb on the liquid-gas phase transition and nuclear multifragmentation
• Searching for the statistically equilibrated systems formed in heavy ion collisions
• Liquid-Gas Phase Transition and Instabilities in Asymmetric Two Component Systems
• Freeze-out volume in multifragmentation - dynamical simulations
• Flow effects on multifragmentation in the canonical model

Cited by in corpus (3)

• Isospin dependent thermodynamics of fragmentation
• Multifragmentation and the symmetry term of the nuclear equation of state
• Symmetry energy from fragment observables in the canonical thermodynamic model