Eur. Phys. J. A (2016) 52: 42
https://doi.org/10.1140/epja/i2016-16042-1

Regular Article - Theoretical Physics

Isospin effects via Coulomb forces on the onset of multifragmentation in light and heavily charged systems

Department of Physics, University of Jammu, 180 006, Jammu, India

^* e-mail: abharti.ju@gmail.com

Received: 9 November 2015
Accepted: 27 January 2016
Published online: 2 March 2016

Abstract

We concurrently study the isospin effects via Coulomb forces and the nuclear equation of state and its momentum dependence on the onset of multifragmentation, i.e., critical energy point, in the light and heavily charged reactions of ⁴⁰Ar + ⁴⁵Sc and ⁸⁴Kr + ¹⁹⁷Au , respectively, using the isospin-dependent quantum molecular dynamics model. We find that Coulomb forces influence the onset of multifragmentation and result in the shift of the critical energy point towards lower and higher incident energies with and without their presence, respectively. Also, we observe that the critical energy point is sharper for the heavily charged system of ⁸⁴Kr + ¹⁹⁷Au when compared with the light charged system of ⁴⁰Ar + ⁴⁵Sc , where a small dip is observed and thus leads to the dependence of onset of multifragmentation, i.e., the critical energy point, on the reaction asymmetry as well as on the Coulomb forces.