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.

arXiv comment5 pages, 7 figures; title changed and two figures added. PRC, in production

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Cited by in corpus (5)

• Density dependence of nuclear symmetry energy constrained by mean-field calculations
• Nuclear symmetry energy and the role of three-body forces
• Symmetry energy at subsaturation densities and the neutron skin thickness of 208Pb
• Probing nuclear symmetry energy with the sub-threshold pion production
• Initialization effect in heavy-ion collisions at intermediate energies