Yield scaling, size hierarchy and fluctuations of observables in fragmentation of excited heavy nuclei

TL;DR

This study investigates multifragmentation in heavy nuclei, analyzing scaling laws, size hierarchies, and fluctuations across different collision systems and energies, revealing consistent critical behaviors and energy regions of maximal fluctuations.

Contribution

It provides a comparative analysis of multifragmentation properties in Xe+Sn and Au+Au collisions, highlighting consistent Fisher scaling and critical energy regions.

Findings

Fisher scaling observed across all data sets.

Pseudo-critical energies are consistent between different collision types.

Maximal fluctuations occur near the pseudo-critical energies.

Abstract

Multifragmentation properties measured with INDRA are studied for single sources produced in Xe+Sn reactions in the incident energy range 32-50 A MeV and quasiprojectiles from Au+Au collisions at 80 A MeV. A comparison for both types of sources is presented concerning Fisher scaling, Zipf law, fragment size and fluctuation observables. A Fisher scaling is observed for all the data. The pseudo-critical energies extracted from the Fisher scaling are consistent between Xe+Sn central collisions and Au quasi-projectiles. In the latter case it also corresponds to the energy region at which fluctuations are maximal. The critical energies deduced from the Zipf analysis are higher than those from the Fisher analysis.