利用中-质微分流探测对称能的高密行为

Probing the high density behavior of the symmetry energy by using the neutron-proton differential flow

基于同位旋和动量依赖的强子输运模型IBUU04,研究了132Sn+124Sn在三种不同碰撞能量、两种不同对称能作用下,中_质微分流随快度的变化关系.发现中_质微分流的强度随碰撞能量的增大而增强.在碰撞能量为400MeV每核子时,中_质微分流对对称能最为敏感.

Based on the isospin- and momemum-dependent transport model IBUU04, we investigated the neutron-proton differential flow in the 132 ^Sn ＋ 124^ Sn mid-central collisions at beam energies of 400MeV/A, 600MeV/A and 800MeV/A by adopting two different symmetry energies. It was found that the neutron-proton differential flow as a function of rapidity is very sensitive to the density dependence of symmetry energy, especially at incident energies around 400MeV/A.