QED CORRECTIONS OF O(MC(2)ALPHA(7)-LN-ALPHA) TO THE FINE-STRUCTURE SPLITTINGS OF HELIUM AND HE-LIKE IONS

Citation
T. Zhang et al., QED CORRECTIONS OF O(MC(2)ALPHA(7)-LN-ALPHA) TO THE FINE-STRUCTURE SPLITTINGS OF HELIUM AND HE-LIKE IONS, Physical review letters, 77(9), 1996, pp. 1715-1718
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
ISSN journal
0031-9007
Volume
77
Issue
9
Year of publication
1996
Pages
1715 - 1718
Database
ISI
SICI code
0031-9007(1996)77:9<1715:QCOOTT>2.0.ZU;2-1
Abstract
A reformulation of the external potential Bethe-Salpeter formalism is developed for two-electron atoms. QED and relativistic corrections to energy levels of order alpha(7)mc(2)In alpha are derived and expressed in terms of expectation values of nonrelativistic operators. Correcti ons of order alpha(7)mc(2) from exchange diagrams are also found. The total contributions of order alpha(7)mc(2)In alpha to the 1s2p P-3(j) fine structure intervals of helium are Delta nu(01) = 82.6 kHz and Del ta nu(12) = - 10.0 kHz. Results are given for He-like ions up to Z = 1 2 and compared with experiment.