Isospin effects on squeeze-out flow in heavy-ion collisions

Abstract

The squeeze-out flow in reactions of ${}^{124}$Sn + ${}^{124}$Sn and ${}^{124}$Ba + ${}^{124}$Ba at different incident energies for different impact parameters is investigated by means of an isospin-dependent quantum molecular dynamics model. For the first time, it is found that the more neutron-rich system (Sn + ${}^{124}$Sn) exhibits weaker squeeze-out flow. This isospin dependence of the squeeze-out flow is shown to mainly result from the isospin dependence of nucleon-nucleon cross section and the symmetry energy.

4 pages in REVTex, 3 figures, 1 table