Neutron to proton ratio dependence of energy of vanishing flow: role of system size and collision geometry

Abstract

Abstract.We study the effects of system size on the neutron to proton ratio dependence of the energy of vanishing flow for isotopic series of various colliding nuclei. We find a significant effect of the nuclear symmetry energy on the neutron to proton ratio dependence of the energy of vanishing flow throughout the mass range for central as well as peripheral collisions. We find that the neutron to proton ratio dependence of the energy of vanishing flow for isotopic series of heavier system shows more sensitivity to the symmetry energy compared to that for lighter systems and that this sensitivity is enhanced in peripheral collisions. In addition, the mass dependence of the energy of vanishing flow has also been studied for systems having a neutron to proton ratio varying from purely symmetric matter to a highly neutron-rich one.