Relativistic and QED corrections for the ground state lithiumlike ionization energies. (16th December 2021)

• Record Type: Journal Article
• Authors: Earwood, William P; Davis, Steven R
• Is Part Of: Journal of physics. Volume 54:Number 21(2021)
• Publication Date: 2021-12-16
• Subjects: cxplicitly correlated Gaussians -- QED corrections -- relativistic corrections -- ionization energies; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/1361-6455/ac3e4d
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: The ground state ionization energies of Z ⩽ 10 lithiumlike ions are calculated using fully correlated Gaussian wavefunctions. Leading-order relativistic corrections are evaluated, while QED corrections are established with small uncertainties by directly calculating the Araki–Sucher energy and expanding the three-electron Bethe logarithm in 1/ Z . The non-relativistic α 6 level shifts have also been calculated, and we have used these energies to recommend ionization energies, which include estimates of the influence of the relativistic portion of the α 6 energy. The results emphasize the importance of the direct computation of the complete α 6 correction, but also the need for new, higher accuracy experimental ionization limits.