Variational calculation for the ground state of lithium and the QED corrections for Li-like ions

Authors

D. K. McKenzie
Gordon W. F. Drake, University of WindsorFollow

Document Type

Article

Publication Date

1991

Publication Title

Physical Review A

Volume

44

Issue

11

First Page

R6973

Last Page

R6976

Abstract

High-precision variational calculations using multiple basis sets in Hylleraas coordinates are presented for the 1s22s 2S state of lithium. The variational bound of -7.478 060 326(10) a.u. for the nonrelativistic energy is in good agreement with our revised experimental value of -7.47 806 034(20) a.u., thereby resolving a long-standing disrepancy. Two-electron calculations of the QED corrections are extended to three-electron systems and compared with other results. The comparison for Li-like ions up to U89+ suggests a simple interpretation for the ''screening of the Lamb shift'' recently calculated by Cheng, Johnson, and Sapirstein [Phys. Rev. Lett. 66, 2960 (1991)]. © 1991 The American Physical Society.

Comments

This article was first published in PHYSICAL REVIEW A. Copyright (2012) American Physical Society (APS). (http://dx.doi.org/10.1103/PhysRevA.44.R6973)

Recommended Citation

McKenzie, D. K. and Drake, Gordon W. F.. (1991). Variational calculation for the ground state of lithium and the QED corrections for Li-like ions. Physical Review A, 44 (11), R6973-R6976.
https://scholar.uwindsor.ca/physicspub/79