Isospin Effects of Threshold Energy of Radial Flow in Heavy Ion Collisions

摘要

The threshold energies of radial Bow in reactions of 40Ca + 40Ca and 48Ca + 48Ca in central collisions are investigated within an isospin dependent quantum molecular dynamics model by using three different forms of symmetry energy. It is found that the neutron-rich system has smaller threshold energy of radial Sow and this quantity depends on the form of symmetry potential. It is indicated that the threshold energy of radial flow can provide a new method to determine the symmetry energy of asymmetric nuclear matter.