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 (10)

• Systematics of central heavy ion collisions in the 1A GeV regime
• Probing the Symmetry Energy with the Spectral Pion Ratio
• Dynamics of clusters and fragments in heavy-ion collisions
• Symmetry energy investigation with pion production from Sn+Sn systems
• Liquid-Gas phase transition in nuclei
• Comparison of AMD calculations with experimental data for peripheral collisions of 93Nb+93Nb,116Sn at 38 MeV/nucleon
• Temperature effects in the nuclear isoscaling
• Space Charge Effects in the S$\pi$RIT Time Projection Chamber
• Experimental study of the ${}^{40,48}$Ca+ ${}^{40,48}$Ca reactions at 35 MeV/nucleon
• 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