Nuclear symmetry energy and proton-rich reactions at intermediate energies

Abstract

Based on an isospin dependent transport model IBUU, effects of high density behavior of nuclear symmetry energy in the proton-rich reaction ${}^{22}$Si+${}^{22}$Si at a beam energy of 400 MeV/nucleon are studied. It is found that the symmetry energy affects ${\pi }^{+}$ production more than ${\pi }^{-}$. More interestingly, comparing with neutron-rich reactions, for ${\pi }^{-}/{\pi }^{+}$ and dense matter's N/Z ratios, effects of symmetry energy in the proton-rich reaction both show contrary behaviors. The practical experiment by using the proton-rich reaction ${}^{22}$Si+${}^{40}$Ca to study nuclear symmetry energy are also provided.

5 pages, 7 figures; title changed and two figures added. PRC, in production

References in corpus (4)

• Neutron and Proton Transverse Emission Ratio Measurements and the Density Dependence of the Asymmetry Term of the Nuclear Equation of State
• Systematics of pion emission in heavy ion collisions in the 1A GeV regime
• Isospin-dependent properties of asymmetric nuclear matter in relativistic mean-field models
• In-medium effects on particle production in heavy ion collisions

Cited by in corpus (2)

• Density dependence of nuclear symmetry energy constrained by mean-field calculations
• Symmetry energy at subsaturation densities and the neutron skin thickness of 208Pb