Neutron resonances in few-body systems and the EOS of neutron star crust

TL;DR

This paper investigates how neutron resonances in the crust of neutron stars, arising from two-body interactions and lattice effects, influence the star's microstructure and gamma radiation oscillations.

Contribution

It introduces the concept of neutron resonances of few-body nature in neutron star crusts and analyzes their impact on the equation of state and density oscillations.

Findings

Discovery of new neutron resonances influenced by lattice parameters

Resonant oscillations of density and gamma radiation in neutron star crusts

Implications for understanding pulsar microstructure

Abstract

The effective interactions formed by neutron rescattering between the nuclei fixed in nodes of the crystalline lattice of neutron star crusts have been considered. In the case of two-body resonances in neutron-nucleus subsystems new neutron resonances of few-body nature come into existence in the overdense crystal under certain conditions. The energies and widths of new resonances get additional dependence on the lattice parameters. The effective interactions result in nonlinear correction to the equation of state determined by the balance of gravitational, Coulomb and nuclear resonance forces. This leads to resonant oscillations of density in the accordant layers of crusts that are accompanied by oscillations of gamma radiation. The phenomena may clarify some processes connected with few-body neutron resonances in neutron star crusts, that have influence on the microstructure of pulsar impulses.