Systematic study of multifragmentation in Au-Au collisions

TL;DR

This study systematically investigates how fragment formation in gold-gold collisions varies with energy and impact parameter, revealing different behaviors across mass ranges and no evidence of liquid-gas phase transition.

Contribution

It provides a comprehensive analysis of fragment production dependence on energy and impact parameter using QMD simulations, highlighting differences across mass ranges.

Findings

Fragment yields follow a power-law distribution.

No clear signal of liquid-gas phase transition observed.

Different behaviors for various mass ranges with changing energy and impact parameter.

Abstract

We performed a systematic study of the formation of fragments with different mass ranges in 197Au+197Au collisions at incident energies between 20 - 1000 MeV/nucleon and at impact para- meter between ^b = 0-0.98. The aim of present study is to understand the complex dependence of fragment production on incident energy and impact parameter. Our results clearly indicate that the QMD simulations of 197Au+197Au predict different behavior for different mass ranges than for IMF's with a change in incident energy and impact parameter. All charge yields can be parameterized by a power law and no signal of liquid-gas phase transition is seen as no unique dependence of tau on impact parameter is seen.