Experimental balance energies and isospin-dependent nucleon-nucleon cross-sections

Abstract

The effect of different isospin-dependent cross-sections on directed flow is studied for a variety of systems (for which experimental balance energies are available) using an isospin-dependent quantum molecular dynamic (IQMD) model. We show that balance energies are sensitive toward isospin-dependent cross sections for light systems, while nearly no effect exists for heavier nuclei. A reduced cross-section σ=0.9σNN with stiff equation of state is able to explain experimental balance energies in most of systems. A power law behavior is also given for the mass dependence of balance energy, which also follows the N/Z dependence. © 2010 The American Physical Society. © 2017 Elsevier B.V., All rights reserved.