Thermal and transport properties in central heavy-ion reactions around a few hundred MeV/nucleon

TL;DR

This paper investigates the thermalization and transport properties of nuclear matter in central heavy-ion collisions at hundreds of MeV/nucleon using an extended Boltzmann-Uehling-Uhlenbeck model, analyzing phase signs and thermodynamic quantities.

Contribution

It introduces the VdWBUU model extension to study thermalization and phase behavior in heavy-ion collisions, providing new insights into nuclear matter properties.

Findings

Identification of liquid-like and gas-like phase signs via shear viscosity behavior.

Extraction of temperature, density, entropy density, shear viscosity, isospin diffusivity, and heat conductivity.

Analysis of phase transition signals during heavy-ion collision processes.

Abstract

Thermalization process of nuclear matter in central fireball region of heavy-ion collisions is investigated by employing an extension model of Boltzmann-Uehling-Uhlenbeck, namely the Van der Waals Boltzmann-Uehling-Uhlenbeck (VdWBUU) model. Temperature ($T$) is extracted by the quantum Fermion fluctuation approach and other thermodynamic quantities, such as density ($\rho$), entropy density ($s$), shear viscosity ($\eta$), isospin diffusivity ($D_{I}$) and heat conductivity ($\kappa$), are also deduced. The liquid-like and gas-like phase signs are discussed through the behavior of shear viscosity during heavy-ion collisions process with the VdWBUU model.