Microscopic analysis of the giant monopole resonance excitation energy

TL;DR

This paper conducts a microscopic analysis of the isoscalar giant monopole resonance (ISGMR) across various nuclei using Skyrme HF+BCS and CDFM, linking resonance energies to nuclear matter properties and neutron skin thickness.

Contribution

It introduces a comprehensive microscopic approach combining Skyrme HF+BCS and CDFM to analyze ISGMR energies and their relation to nuclear matter incompressibility and neutron skin thickness.

Findings

Calculated ISGMR energies align with experimental data.

Identified a correlation between neutron skin thickness and ISGMR energy.

Provided insights into nuclear incompressibility from finite nuclei data.

Abstract

A systematic study of the isoscalar giant monopole resonance (ISGMR) in a wide range of nuclei from various isotopic chains is performed within the microscopic self-consistent Skyrme HF+BCS method and coherent density fluctuation model (CDFM). The calculations for the nuclear incompressibility are based on the Brueckner and Barcelona-Catania-Paris-Madrid (BCPM) energy density functionals for nuclear matter using the capability of the CDFM to make a transition to the corresponding incompressibility in finite nuclei. The results obtained by applying of different definitions of the ISGMR energy, as well as the two energy-density functionals, are analyzed and compared with the available experimental data. The consideration includes the peculiarities of the proton and neutron density distributions and their corresponding linear size characteristics. In general, a connection with the measured neutron skin thicknesses is proposed as a possible way for realistic estimations of the energy of ISGMR.