Nuclear equation of state and incompressibility in a model with correlations from giant monopole vibrations

TL;DR

This paper investigates the nuclear equation of state and incompressibility by incorporating correlations from giant monopole vibrations, analyzing the effects of 1p-1h and 2p-2h admixtures on stability and incompressibility.

Contribution

It introduces a model that includes correlations from giant monopole vibrations to study the nuclear equation of state and incompressibility, highlighting the impact of 1p-1h and 2p-2h admixtures.

Findings

Stable and unstable points in the equation of state depend on admixtures.

2p-2h admixtures lead to a single stable point.

Incompressibility differs significantly from the Hartree approximation.

Abstract

The nuclear equation of state and incompressibility are studied in a model with correlations. We first consider a Hartree solution and then add one-particle-one hole (1p-1h) and two particle-two hole (2p-2h) admixtures into the wavefunction using a separable monopole-monopole interaction which induces giant monopole vibrations. Stable and unstable point arise in the nuclear equation of state as a function of the oscillator size parameter from pure 1p-1h admixtures. Addition of 2p-2h admixtures lead to one stable point. However, the incompressibility is found to be quite different from the Hartree case with 1p-1h admixtures, even with 2p-2h states included. PACS 21.65.Mn, 24.30.Cz