Isospin influences on particle emission and critical phenomenon in nuclear dissociation

Abstract

Features of particle emission and critical point behavior are investigated as functions of the isospin of disassembling sources and temperature at a moderate freeze-out density for medium-size Xe isotopes in the framework of isospin dependent lattice gas model. Multiplicities of emitted light particles, isotopic and isobaric ratios of light particles show the strong dependence on the isospin of the dissociation source, but double ratios of light isotope pairs and the critical temperature determined by the extreme values of some critical observables are insensitive to the isospin of the systems. Values of the power law parameter of cluster mass distribution, mean multiplicity of intermediate mass fragments ($IMF$), information entropy ($H$) and Campi's second moment ($S_2$) also show a minor dependence on the isospin of Xe isotopes at the critical point. In addition, the slopes of the average multiplicites of the neutrons ($N_n$), protons ($N_p$), charged particles ($N_{CP}$), and IMFs ($N_{imf}$), slopes of the largest fragment mass number ($A_{max}$), and the excitation energy per nucleon of the disassembling source ($E^{\ast }/A$) to temperature are investigated as well as variances of the distributions of $N_n$, $N_p$, $N_{CP}$, $N_{IMF}$, $A_{max}$ and $E^{\ast }/A$. It is found that they can be taken as additional judgements to the critical phenomena.

9 Pages, 8 figures

References in corpus (9)

• Isospin Physics in Heavy-Ion Collisions at Intermediate Energies
• Equation of state of asymmetric nuclear matter and collisions of neutron-rich nuclei
• Breakup Temperature of Target Spectators in Au + Au Collisions at E/A = 1000 MeV
• Temperatures of Exploding Nuclei
• First Order Phase Transition in Intermediate Energy Heavy Ion Collisions
• The lattice gas model with isospin-dependent interactions
• A model for nuclear matter fragmentation: phase diagram and cluster distributions
• Isospin Effects of the Critical Behavior in the Lattice Gas Model
• Excitation Energy as a Basic Variable to Control Nuclear Disassembly

Cited by in corpus (21)

• Isoscaling of projectile-like fragments
• The many facets of the (non relativistic) Nuclear Equation of State
• Surveying the Nucleon-Nucleon Momentum Correlation Function in the Framework of Quantum Molecular Dynamics Model
• Isobaric yield ratios in heavy-ion reactions, and symmetry energy of neutron-rich nuclei at intermediate energies
• Probing the density dependence of symmetry energy via multifragmentation at sub-saturation densities
• Isoscaling in the Lattice Gas Model
• Neutron/proton ratio of nucleon emissions as a probe of neutron skin
• Isoscaling behavior in the Fission Dynamics
• Isobaric Yield Ratio Difference in Heavy-ion Collisions, and Comparison to Isoscaling
• Temperature determined by isobaric yield ratio in heavy-ion collisions
• Isospin effects on two-particle correlation functions in E/A = 61 MeV 36Ar + 112,124Sn reactions
• Systematic study of isoscaling behavior in projectile fragmentation by the statistical abrasion-ablation model
• Isospin effect in the statistical sequential decay
• Scaling of Anisotropic Flows and Nuclear Equation of State in Intermediate Energy Heavy Ion Collisions
• Effect of neutron skin thickness on projectile fragmentation
• Moment Analysis and Zipf Law
• Improved Thermometer from Intermediate Mass Fragments in Heavy-Ion Collisions with Isobaric Yield Ratio Difference
• Density dependence of the "symmetry energy" in the lattice gas model
• Dynamical and sequential decay effects on isoscaling and density dependence of the symmetry energy
• Statistical nature of cluster emission in nuclear liquid-vapour phase coexistence
• Isospin and momentum dependence of liquid-gas phase transition in hot asymmetric nuclear matter