Nuclear symmetry energy and proton-rich reactions at intermediate energies

Details Nuclear symmetry energy and proton-rich reactions at intermediate energies Nuclear symmetry energy and proton-rich reactions at intermediate energies

2010-12-14

arxiv.org/abs/1012.2921v2

Phys.Rev.C84:014607,2011

Physics

Nuclear Physics

Nuclear Theory

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

Scientific paper

10.1103/PhysRevC.84.014607

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.

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