Reconstructed primary fragments and symmetry energy, temperature and density of the fragmenting source in ${}^{64}$Zn + ${}^{112}$Sn at 40 MeV/nucleon

Abstract

Symmetry energy, temperature and density at the time of the intermediate mass fragment formation are determined in a self-consistent manner, using the experimentally reconstructed primary hot isotope yields and anti-symmetrized molecular dynamics (AMD) simulations. The yields of primary hot fragments are experimentally reconstructed for multifragmentation events in the reaction system ${}^{64}$Zn + ${}^{112}$Sn at 40 MeV/nucleon. Using the reconstructed hot isotope yields and an improved method, based on the modified Fisher model, symmetry energy values relative to the apparent temperature, $a_{sym}/T$, are extracted. The extracted values are compared with those of the AMD simulations, extracted in the same way as that for the experiment, with the Gogny interaction with three different density-dependent symmetry energy terms. $a_{sym}/T$ values change according to the density-dependent symmetry energy terms used. Using this relation, the density of the fragmenting system is extracted first. Then symmetry energy and apparent temperature are determined in a self consistent manner in the AMD model simulations. Comparing the calculated $a_{sym}/T$ values and those of the experimental values from the reconstructed yields, $\rho /{\rho }_0=0.65\pm 0.02$, $a_{sym}=23.1\pm 0.6$ MeV and $T=5.0\pm 0.4$ MeV are evaluated for the fragmenting system experimentally observed in the reaction studied.

arXiv comment28 pages, 7 figures. arXiv admin note: text overlap with arXiv:1405.6911, Nucl. Phys. A (2014)

References in corpus (41)

• The Physics of Neutron Stars
• Recent Progress and New Challenges in Isospin Physics with Heavy-Ion Reactions
• Isotopic Scaling in Nuclear Reactions
• Isospin Fractionation in Nuclear Multifragmentation
• Constraint Molecular Dynamics approach to Fermionic systems
• The Giant Dipole Resonance as a quantitative constraint on the symmetry energy
• Isotopic dependence of the giant monopole resonance in the even-A ^{112-124}Sn isotopes and the asymmetry term in nuclear incompressibility
• Neutron and Proton Transverse Emission Ratio Measurements and the Density Dependence of the Asymmetry Term of the Nuclear Equation of State
• 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
• Antisymmetrized molecular dynamics with quantum branching processes for collisions of heavy nuclei
• Statistical Multifragmentation in Central Au+Au Collisions at 35 MeV/u
• 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
• Characteristics of the fragments produced in central collisions of 129Xe+ natSn from 32 to 50 AMeV
• Antisymmetrized molecular dynamics of wave packets with stochastic incorporation of Vlasov equation
• Probing the Nuclear Symmetry Energy with Heavy Ion Collisions
• Isospin dependent multifragmentation of relativistic projectiles
• Constrained Molecular Dynamics II: a N-body approach to nuclear systems
• Isobaric Yield Ratios and The Symmetry Energy In Fermi Energy Heavy Ion Reactions
• Reaction Dynamics and Multifragmentation in Fermi Energy Heavy Ion Reactions
• Measuring the Temperature of Hot Nuclear Fragments
• 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
• The Microscopic Approach to Nuclear Matter and Neutron Star Matter
• Multifragmentation process for different mass asymmetry in the entrance channel around the Fermi energy
• The Influence of in-medium NN cross-sections, symmetry potential and impact parameter on the isospin observables
• The Nuclear Matter Symmetry Energy at $0.03\le \rho /{\rho }_0\le 0.2$
• The Quantum Nature of a Nuclear Phase Transition
• Comparative Study of Multifragmentation of Gold Nuclei Induced by Relativistic Protons, ${}^4$He, and ${}^{12}$C
• Constraining the Symmetry Term in the Nuclear Equation of State at Sub-Saturation Densities and Finite Temperatures
• A novel approach to Isoscaling: the role of the order parameter m = (N-Z)/A
• The Isospin Dependence Of The Nuclear Equation Of State Near The Critical Point
• Critical behavior of the isotope yield distributions in the Multifragmentation Regime of Heavy Ion Reactions
• Isocaling and the Symmetry Energy in the Multifragmentation Regime of Heavy Ion Collisions
• Symmetry interaction and many-body correlations
• A novel determination of density, temperature and symmetry energy for nuclear multi-fragmentation through primary fragment yield reconstruction
• New isospin e ffects in central heavy-ion collisions at Fermi energies
• Primary Isotope Yields and Characteristic Properties of the Fragmenting Source in Heavy-ion Reactions near the Fermi Energies

Cited by in corpus (4)

• Improved Thermometer from Intermediate Mass Fragments in Heavy-Ion Collisions with Isobaric Yield Ratio Difference
• Post breakup dynamics of fragments produced in nuclear multifragmentation
• Isotopic dependence of the fragments' internal temperatures observed in multifragment emission
• Fragment productions in DJBUU and SQMD: comparative study