Study of gold induced heavy ion collisions using isospin dependent QMD model

TL;DR

This study investigates fragment production in gold heavy ion collisions at 600 MeV/nucleon using an isospin-dependent QMD model, highlighting the limitations of the MST clustering method and proposing improvements with SACA.

Contribution

It introduces an analysis of gold-induced heavy ion collisions with isospin dependence and compares different clustering algorithms to improve fragment prediction accuracy.

Findings

Good agreement for low Zbound fragment multiplicity

MST method fails at high Zbound due to clustering limitations

Using SACA improves agreement with experimental data

Abstract

We have studied the fragment production mechanism in the set of four reactions 197Au79+12C6, 197Au79+26Al13, 197Au79+63Cu29 and 197Au79+208Pb82. The reactions are simulated at an energy 600 MeV/nucleon and collision geometry is varied from central to peripheral (= b/bmax = 0 to 1). A theoretical investigation has been carried out on the study of mass dependence of intermediate mass fragments (5\leqA\leqAtot/6) and other fragments. It is observed that multiplicity shows a good agreement for low Zbound, but it fails for high Zbound. This failure is due the method of analysis MST which we had used in our analysis, because MST method gives one heavy cluster at the time of high density. The discrepancy between theory and experiments can be removed by using reduced isospin dependent NN cross section and sophisticated clustrization algorithm SACA.