Transverse emission of isospin ratios as a probe of high-density symmetry energy in isotopic nuclear reactions

Abstract

Transverse emission of preequilibrium nucleons, light clusters (complex particles) and charged pions from the isotopic ${}^{112,124}$Sn+${}^{112,124}$Sn reactions at a beam energy of 400\emph{A} MeV, to extract the high-density behavior of nuclear symmetry energy, are investigated within an isospin and momentum dependent transport model. Specifically, the double ratios of neutron/proton, triton/helium-3 and ${\pi }^{-}/{\pi }^{+}$ in the squeeze-out domain are analyzed systematically, which have the advantage of reducing the influence of the Coulomb force and less systematic errors. It is found that the transverse momentum distribution of isospin ratios strongly depend on the stiffness of nuclear symmetry energy, which would be a nice observable to extract the high-density symmetry energy. The collision centrality and the mass splitting of neutron and proton in nuclear medium play a significant role on the distribution structure of the ratios, but does not change the influence of symmetry energy on the spectrum.

5 figures, 13 pages

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• Nuclear dynamics and particle production near threshold energies in heavy-ion collisions
• Nuclear in-medium effects and collective flows in heavy-ion collisions at intermediate energies
• Elliptic flow and the symmetry energy at supra-saturation density
• Constraining the high-density nuclear symmetry energy with the transverse-momentum dependent elliptic flow
• Isospin splitting of nucleon effective mass from giant resonances in ${}^{208}$Pb
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• Impact of NICER's Radius Measurement of PSR J0740+6620 on Nuclear Symmetry Energy at Suprasaturation Densities
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• Flow probe of symmetry energy in relativistic heavy-ion reactions
• In-medium and isospin effects on particle production near threshold energies in heavy-ion collisions
• Understanding the symmetry energy using data from the ALADIN-2000 Collaboration taken at the GSI Large Neutron Detector
• Model dependence of isospin sensitive observables at high densities
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• Nuclear fragmentation and charge-exchange reactions induced by pions in the $\Delta$-resonance region
• Nuclear in-medium and isospin effects on subthreshold kaon production in heavy-ion collisions
• Particle production in antiproton induced nuclear reactions
• Bayesian inference on the isospin splitting of nucleon effective mass from giant resonances in ${}^{208}$Pb
• Auxiliary Function Approach for Determining Symmetry Energy at Supra-saturation Densities
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• Isospin splitting of nucleon effective mass and symmetry energy in isotopic nuclear reactions
• Unexpected neutron/proton ratio and isospin effect in low-energy antiproton induced reactions
• Nuclear fragmentation induced by low-energy antiprotons within a microscopic transport approach
• Effects of Symmetry Energy in the Reaction 40Ca+124Sn at 140 MeV/nucleon
• Transport Model Comparison Studies of Intermediate-Energy Heavy-Ion Collisions