Statistical analysis of experimental multifragmentation events in ${}^{64}$Zn + ${}^{112}$Sn at 40 MeV/nucleon

Abstract

A statistical multifragmentation model (SMM) is applied to the experimentally observed multifragmentation events in an intermediate heavy ion reaction.Using the temperature and symmetry energy extracted from the isobaric yield ratio (IYR) method based on the Modified Fisher Model (MFM), SMM is applied to the reaction ${}^{64}$Zn + ${}^{112}$Sn at 40 MeV/nucleon. The experimental isotope distribution and mass distribution of the primary reconstructed fragments are compared without afterburner and they are well reproduced. The extracted temperature $T$ and symmetry energy coefficient $a_{sym}$ from SMM simulated events, using the IYR method, are also consistent with those from the experiment. These results strongly suggest that in the multifragmentation process there is a freezeout volume, in which the thermal and chemical equilibrium is established before or at the time of the intermediate-mass fragments emission.

References in corpus (32)

• The Physics of Neutron Stars
• Recent Progress and New Challenges in Isospin Physics with Heavy-Ion Reactions
• Constraint Molecular Dynamics approach to Fermionic systems
• Isospin fractionation and isoscaling in dynamical nuclear collisions
• Nuclear multifragmentation and phase transition for hot nuclei
• An Improved Quantum Molecular Dynamics Model and its Applications to Fusion Reaction near Barrier
• Isospin effects in Nuclear Fragmentation
• Symmetry energy of dilute warm nuclear matter
• Antisymmetrized molecular dynamics with quantum branching processes for collisions of heavy nuclei
• Elliptic flow and system size dependence of transition energies at intermediate energies
• Further Development of the Improved QMD Model and its Applications to Fusion Reaction near Barrier
• Isotopic Scaling and the Symmetry Energy in Spectator Fragmentation
• Antisymmetrized molecular dynamics of wave packets with stochastic incorporation of Vlasov equation
• Constrained Molecular Dynamics II: a N-body approach to nuclear systems
• Breakup Temperature of Target Spectators in Au + Au Collisions at E/A = 1000 MeV
• Statistical approach for supernova matter
• Statistical evolution of isotope composition of nuclear fragments
• Isobaric Yield Ratios and The Symmetry Energy In Fermi Energy Heavy Ion Reactions
• Production of hypernuclei in multifragmentation of nuclear spectator matter
• Compatibility of localized wave packets and unrestricted single particle dynamics for cluster formation in nuclear collisions
• Probing the density dependence of the symmetry potential with peripheral heavy-ion collisions
• Tracing the evolution of the symmetry energy of hot nuclear fragments from the compound nucleus towards multifragmentation
• The Influence of in-medium NN cross-sections, symmetry potential and impact parameter on the isospin observables
• The Quantum Nature of a Nuclear Phase Transition
• Formation of hypernuclei in heavy-ion collisions around the threshold energies
• Symmetry interaction and many-body correlations
• A novel determination of density, temperature and symmetry energy for nuclear multi-fragmentation through primary fragment yield reconstruction
• Relevance of equilibrium in multifragmentation
• New isospin e ffects in central heavy-ion collisions at Fermi energies
• Experimental reconstruction of primary hot isotopes and characteristic properties of the fragmenting source in the heavy ion reactions near the Fermi energy
• Primary Isotope Yields and Characteristic Properties of the Fragmenting Source in Heavy-ion Reactions near the Fermi Energies
• Multifragmentation and Symmetry Energy Studied with AMD

Cited by in corpus (2)

• Sensitivity study of experimental measures for the nuclear liquid-gas phase transition in the statistical multifragmentation model
• Investigation of the nuclear liquid-gas phase transition in the static AMD