Deformed one-quasiparticle states in covariant density functional theory

TL;DR

This paper evaluates the accuracy of covariant density functional theory in describing deformed one-quasiparticle states in actinide and rare-earth regions, highlighting the need for particle-vibration coupling for improved spectroscopic quality.

Contribution

It systematically analyzes discrepancies in quasiparticle energies and suggests that incorporating particle-vibration coupling is essential for better spectroscopic descriptions.

Findings

Discrepancies between theory and experiment are identified.

Better parametrization improves ground state and spectra.

Particle-vibration coupling is necessary for spectroscopic accuracy.

Abstract

Systematic investigation of the accuracy of the description of the energies of deformed one-quasiparticle states has been performed in covariant density functional theory in actinide and rare-earth mass regions. The sources of the discrepancies between theory and experiment are analyzed. Although some improvements in the description of ground state configurations and one-quasiparticle spectra can be achieved by better parametrization of the relativistic mean field Lagrangian, the analysis suggests that spectroscopic quality of their description can be achieved only in theoretical framework which takes into account particle-vibration coupling.