Normal or abnormal isospin-fractionation as a qualitative probe of nuclear symmetry energy at supradensities

Abstract

Within two different frameworks of isospin-dependent transport model, effect of nuclear symmetry energy at supradensities on the isospin-fractionation (IsoF) was investigated. With positive/negative symmetry potential at supradensities (i.e., values of symmetry energy increase/decrease with density above saturation density), for energetic nucleons, the value of neutron to proton ratio of free nucleons is larger/smaller than that of bound nucleon fragments. Compared with extensively studied quantitative observables of nuclear symmetry energy, the normal or abnormal isospin-fractionation of energetic nucleons can be a qualitative probe of nuclear symmetry energy at supradensities.

5 pages, 5 figures, accepted by Physics Letters B

References in corpus (7)

• Symmetry energy from elliptic flow in 197Au + 197Au
• Systematics of central heavy ion collisions in the 1A GeV regime
• Isospin effects on sub-threshold kaon production at intermediate energies
• Constraining the high-density nuclear symmetry energy with the transverse-momentum dependent elliptic flow
• Triton-${}^3$He relative and differential flows as probes of the nuclear symmetry energy at supra-saturation densities
• Differential isospin-fractionation in dilute asymmetric nuclear matter
• The influence of reconstruction criteria on the sensitive probes of the symmetry potential

Cited by in corpus (5)

• Results of the ASY-EOS experiment at GSI: The symmetry energy at suprasaturation density
• Effects of pion potential and nuclear symmetry energy on the ${\pi }^{-}/{\pi }^{+}$ ratio in heavy-ion collisions at beam energies around the pion production threshold
• Decomposition of sensitivity of the symmetry energy observables
• The effect of internal magnetic field on collective flow in heavy ion collisions at intermediate energies
• Probing dense QCD matter in the laboratory: The CBM experiment at FAIR