Finite temperature collective modes in a two phase coexistence region of asymmetric nuclear matter

TL;DR

This paper investigates how phase coexistence in low density asymmetric nuclear matter affects collective modes, revealing significant modifications in energy spectra at certain temperatures and compositions, emphasizing the importance of considering phase separation effects.

Contribution

It introduces a Landau-Fermi liquid approach to analyze collective modes in coexisting phases of asymmetric nuclear matter, highlighting the impact of phase separation on energy spectra.

Findings

Significant modifications in collective mode energy spectra due to phase separation.

Temperature and isospin asymmetry influence the collective modes.

Neglecting phase separation effects can lead to inaccurate predictions.

Abstract

The relation between collective modes and the phase transition in low density nuclear matter is examined. The dispersion relations for collective modes in a linear approach are evaluated within a Landau-Fermi liquid scheme by assuming coexisting phases in thermodynamical equilibrium. Temperature and isospin composition are taken as relevant parameters. The in-medium nuclear interaction is taken from a recently proposed density functional model. We found significative modifications in the energy spectrum, within certain range of temperatures and isospin asymmetry, due to the separation of matter into independent phases. We conclude that detailed calculations should not neglect this effect.