Stability of the fragments and thermalization at peak center-of-mass energy

TL;DR

This paper investigates the stability and thermalization processes in heavy-ion collisions at peak center-of-mass energies, analyzing fragment properties, stopping, and density evolution using simulations with a hard EOS and MSTB clustering.

Contribution

It provides new insights into fragment stability, thermalization, and density dependence in symmetric and asymmetric nuclear collisions at peak energies.

Findings

Heavy systems are needed for complete stopping.

Fragment stability assessed via persistence coefficient and gain term.

Power law dependence observed in density and collision dynamics.

Abstract

We simulate the central reactions of nearly symmetric, and asymmetric systems, for the energies at which the maximum production of IMFs occurs (E$_{c.m.}^{peak}$).This study is carried out by using hard EOS along with cugnon cross section and employing MSTB method for clusterization. We study the various properties of fragments. The stability of fragments is checked through persistence coefficient and gain term. The information about the thermalization and stopping in heavy-ion collisions is obtained via relative momentum, anisotropy ratio, and rapidity distribution. We find that for a complete stopping of incoming nuclei very heavy systems are required. The mass dependence of various quantities (such as average and maximum central density, collision dynamics as well as the time zone for hot and dense nuclear matter) is also presented. In all cases (i.e., average and maximum central density, collision dynamics as well as the time zone for hot and dense nuclear matter) a power law dependence is obtained.