Isospin equilibration processes and dynamical correlations: study of the system $^{40}Cl+^{28}Si$ at 40 MeV/nucleon

TL;DR

This paper introduces an observable based on the time derivative of the dipole signal to study isospin equilibration in nuclear collisions, demonstrating its sensitivity through semiclassical simulations of the $^{40}Cl+^{28}Si$ system at 40 MeV/nucleon.

Contribution

It proposes a new observable for investigating isospin equilibration and analyzes its sensitivity to interaction parameters using microscopic many-body calculations.

Findings

The observable effectively probes charge/mass equilibration during early collision stages.

It is sensitive to different isospin-dependent interaction parameterizations.

The study provides insights into dynamical correlations in nuclear reactions.

Abstract

The asymptotic time derivative of the total dipole signal is proposed as an useful observable to investigate on Isospin equilibration phenomenon in multi-fragmentation processes. 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. General properties of this observable and the links with others isospin dependent phenomena are discussed. In particular, the $^{40}Cl+^{28}Si$ system at 40 MeV/nucleon is investigated by means of semiclassical microscopic many-body calculations based on the CoMD-II model. The study of the dynamical many-body correlations produced by the model also shows how the proposed observable is rather sensitive to different parameterizations of the isospin dependent interaction.