Systematic study of multi-fragmentation in asymmetric colliding nuclei

TL;DR

This study uses quantum molecular dynamics to analyze multifragmentation in asymmetric heavy-ion collisions across a broad energy range, revealing unique effects of mass asymmetry and Coulomb interactions.

Contribution

It provides a systematic theoretical analysis of multifragmentation in asymmetric nuclei, highlighting the impact of Coulomb interactions and mass asymmetry on fragment production.

Findings

Coulomb interactions increase fragment production by about 20%

Asymmetric nuclei do not show the peak trend around 100 MeV/nucleon seen in symmetric nuclei

Large asymmetric nuclei exhibit different multifragmentation behavior, requiring experimental verification.

Abstract

We present a complete systematically theoretical study of multifragmentation for asymmetric colliding nuclei for heavy-ion reactions in the energy range between 50 MeV/nucleon and 600 MeV/nucleon by using soft and hard equations of state. This study is performed within an isospindependent quantum molecular dynamics model. To see the effect of mass asymmetry, simulations are carried out in the absence of Coulomb interactions. Coulomb interactions enhances the production of fragments by about 20%. We envision an interesting outcome for large asymmetric colliding nuclei. Although nearly symmetric nuclei depict a well known trend for rising and falling with a peak around E= 100 MeV/nucleon, this trend, however, is completely missing for large asymmetric nuclei. Therefore, experiments are needed to verify this prediction.