Isoscaling in central Sn+Sn collisions at 270 MeV/u

Abstract

Experimental information on fragment emissions is important in understanding the dynamics of nuclear collisions and in the development of transport model simulating heavy-ion collisions. The composition of complex fragments emitted in the heavy-ion collisions can be explained by statistical models, which assume that thermal equilibrium is achieved at collision energies below 100 MeV/u. Our new experimental data together with theoretical analyses for light particles from Sn+Sn collisions at 270 MeV/u, suggest that the hypothesis of thermal equilibrium breaks down for particles emitted with high transfer momentum. To inspect the system's properties in such limit, the scaling features of the yield ratios of particles from two systems, a neutron-rich system of ${}^{132}\mathrm{Sn}+{}^{124}\mathrm{Sn}$ and a nearly symmetric system of ${}^{108}\mathrm{Sn}+{}^{112}\mathrm{Sn}$, are examined in the framework of the statistical multifragmentation model and the antisymmetrized molecular dynamics model. The isoscaling from low energy particles agree with both models. However the observed breakdown of isoscaling for particles with high transverse momentum cannot be explained by the antisymmetrized molecular dynamics model.

References in corpus (35)

• The STAR Time Projection Chamber: A Unique Tool for Studying High Multiplicity Events at RHIC
• Isospin Fractionation in Nuclear Multifragmentation
• Isotopic Scaling in Nuclear Reactions
• Equation of state of asymmetric nuclear matter and collisions of neutron-rich nuclei
• Isospin fractionation and isoscaling in dynamical nuclear collisions
• Systematics of central heavy ion collisions in the 1A GeV regime
• Isoscaling in Light-Ion Induced Reactions and its Statistical Interpretation
• The Thermodynamic Model for Nuclear Multifragmentation
• Probing the Symmetry Energy with the Spectral Pion Ratio
• Isospin-tracing: A probe of non-equilibrium in central heavy-ion collisions
• Isotopic Scaling and the Symmetry Energy in Spectator Fragmentation
• Subthreshold pion production within a transport description of central Au+Au collisions
• Dynamics of clusters and fragments in heavy-ion collisions
• Directed flow in Au+Au, Xe+CsI and Ni+Ni collisions and the nuclear equation of state
• S$\pi$RIT: A time-projection chamber for symmetry-energy studies
• Fragment Isotope Distributions and the Isospin Dependent Equation of State
• Symmetry energy investigation with pion production from Sn+Sn systems
• Probing neutron-proton dynamics by pions
• Liquid-Gas phase transition in nuclei
• Conditions for Isoscaling in Nuclear Reactions
• Isospin Effects in Nuclear Multifragmentation
• Dynamical aspects of isoscaling
• Tracing the Evolution of Temperature in Near Fermi Energy Heavy Ion Collisions
• Statistical description of nuclear break-up
• Equilibrium constants of Hydrogen and Helium isotopes at low nuclear densities
• Comparison of AMD calculations with experimental data for peripheral collisions of 93Nb+93Nb,116Sn at 38 MeV/nucleon
• Temperature effects in the nuclear isoscaling
• A Gating Grid Driver for Time Projection Chambers
• The S$\pi$RIT Time Projection Chamber
• Charged particle track reconstruction with S$\pi$RIT Time Projection Chamber
• KATANA - a charge-sensitive triggering system for the S$\pi$RIT experiment
• Experimental study of the ${}^{40,48}$Ca+ ${}^{40,48}$Ca reactions at 35 MeV/nucleon
• Space Charge Effects in the S$\pi$RIT Time Projection Chamber
• Post breakup dynamics of fragments produced in nuclear multifragmentation
• Isoscaling and the symmetry energy in spectator fragmentation

Cited by in corpus (3)

• Kinetic approach of light-nuclei production in intermediate-energy heavy-ion collisions
• Collision integral with momentum-dependent potentials and its impact on pion production in heavy-ion collisions
• Constraining nucleon effective masses with flow and stopping observables from the S$\pi$RIT experiment