Structure and Lamb shift of 2{ital s}{sub 1/2}-2{ital p}{sub 3/2} levels in lithiumlike Th{sup 87+} through neonlike Th{sup 80+}
- Lawrence Livermore National Laboratory, University of California, Livermore, California, 94551 (United States)
The value is sensitive to the effect of nuclear polarization and tests predictions of the 36-eV contribution from quantum electrodynamics to within 0.39%. A similar test of quantum electrodynamics calculations is given by the twelve 2{ital s}{sub 1/2}-2{ital p}{sub 3/2} transitions measured in the neighboring charge states. A comparison of the measured energies of the 2{ital s}{sub 1/2}-2{ital p}{sub 3/2} transitions in berylliumlike Th{sup 86+} through neonlike Th{sup 80+} with theoretical predictions from multiconfiguration Dirac-Fock calculations demonstrates the need for a better treatment of the electron-correlation terms in these highly charged multielectron ions. The measurements thus provide benchmarks for the development of theoretical approaches, such as relativistic many-body perturbation theory and large-scale configuration-interaction calculations, that attempt to account for electron correlations in very highly charged ions.
- Research Organization:
- Lawrence Livermore National Laboratory
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 118445
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 4 Vol. 52; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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