Nuclear single-particle states: dynamical shell model and energy density functional methods

TL;DR

This paper compares various theoretical approaches, including the dynamical shell model and energy density functional methods, to understand nuclear single-particle spectra and the effects of particle-vibration coupling, focusing on neutron states in 208Pb.

Contribution

It provides a critical comparison of the dynamical shell model and EDF approaches in explaining nuclear single-particle spectra and fragmentation.

Findings

Particle-vibration coupling explains spectral fragmentation.

EDF approaches offer a different perspective on single-particle states.

Analysis of neutron states in 208Pb highlights model differences.

Abstract

We discuss different approaches to the problem of reproducing the observed features of nuclear single-particle (s.p.) spectra. In particular, we analyze the dominant energy peaks, and the single-particle strength fragmentation, using the example of neutron states in 208Pb. Our main emphasis is the interpretation of that fragmentation as due to particle-vibration coupling (PVC). We compare with recent Energy Density Functional (EDF) approaches, and try to present a critical perspective.