Isospin effects in the disappearance of flow as a function of colliding geometry

TL;DR

This study investigates how isospin influences the disappearance of flow in nuclear collisions, emphasizing Coulomb effects over a broad mass range and various collision geometries.

Contribution

It provides a comprehensive analysis of isospin effects on balance energy across different masses and geometries, highlighting Coulomb dominance and the roles of symmetry energy and nucleon-nucleon cross sections.

Findings

Coulomb repulsion dominates isospin effects on E$_{bal}$

Symmetry energy and nucleon-nucleon cross section effects are consistent across masses and geometries

Counterbalancing effects between nucleon-nucleon collisions, mean field, and Coulomb are demonstrated

Abstract

We study the effect of isospin degree of freedom on the balance energy (E$_{bal}$) as well as its mass dependence throughout the mass range 48-270 for two sets of isobaric systems with N/Z = 1 and 1.4 at different colliding geometries ranging from central to peripheral ones. Our findings reveal the dominance of Coulomb repulsion in isospin effects on E$_{bal}$ as well as its mass dependence throughout the range of the colliding geometry. Our results also indicate that the effect of symmetry energy and nucleon-nucleon cross section on E$_{bal}$ is uniform throughout the mass range and throughout the colliding geometry. We also present the counter balancing of nucleon-nucleon collisions and mean field by reducing the Coulomb and the counter balancing of Coulomb and mean filed by removing the nucleon-nucleon collisions.