1/Z expansion calculation of the Bethe logarithm for the ground state Lamb shift of two-electron ions

14 April 1983

journal article
Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics

Vol. 16 (7) , L183-L187
https://doi.org/10.1088/0022-3700/16/7/001

Abstract

The leading two terms in the 1/Z expansion of the two-electron Bethe logarithm are calculated by the application of a new finite basis set method. The results can be expressed in the form ln epsilon (1s² ¹S)=ln(19.77(Z-0.0063)²). The high-Z behaviour appears to differ from that of a previous variational calculation by Aashamar and Austvik (1976).

Keywords

GROUND STATE

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