Isospin equilibration in multi-fragmentation processes and dynamical correlations

TL;DR

This paper introduces a new observable based on the time derivative of the dipole signal to study isospin equilibration in nuclear multi-fragmentation, using semiclassical simulations of a specific nuclear collision.

Contribution

It proposes and tests a novel observable for analyzing isospin equilibration, demonstrating its sensitivity to interaction parameters in microscopic models.

Findings

The observable effectively tracks charge/mass equilibration during collisions.

It shows sensitivity to different isospin-dependent interaction parameterizations.

The method provides insights into dynamical correlations in nuclear fragmentation.

Abstract

The asymptotic time derivative of the total dipole signal is proposed as an useful observable to study Isospin equilibration phenomenon in multi-fragmentation processes. The study proceeds through the investigation of the $^{40}Cl+^{28}Si$ system at 40 MeV/nucleon by means of semiclassical microscopic many-body calculations based on the CoMD-II model. In particular, the study has been developed to describe charge/mass equilibration processes involving the gas and liquid "phases" of the total system formed during the early stage of a collision. Through the investigation of dynamical many-body correlations, it is also shown how the proposed observable is rather sensitive to different parameterizations of the isospin dependent interaction.