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Finding a Probe for Extracting Information on the Momentum Dependent-Interaction in Heavy Ion Collisions

The effect of momentum-dependent interaction on the kinetic energy spectrum of the neutron-proton ratio ⟨(n/p)gas⟩b (Ek) for 64Zn + 64Zn is studied. It is found that ⟨(n/p)gas⟩b (Ek) sensitively depends on the momentum-dependent interaction and weakly on the in-medium nucleon-nucleon cross section and symmetry potential. Therefore ⟨(n/p)gas⟩b(Ek) is a possible probe for extracting information on the momentum-dependent interaction in heavy ion collisions.