Measurement of the Two-Loop Lamb Shift in Lithiumlike U{sup 89+}
Journal Article
·
· Physical Review Letters
- Department of Physics and Advanced Technologies, Lawrence Livermore National Laboratory, Livermore, California 94550-9234 (United States)
Using the SuperEBIT electron beam ion trap, we have measured the 2s{sub 1/2}-2p{sub 1/2} transitions in U{sup 88+} and U{sup 89+}. The measured value of 280.645{+-}0.015 eV for Li-like U{sup 89+} improves the available precision by nearly an order of magnitude and establishes a new benchmark for testing the total QED contribution to the transition energy within a fractional accuracy of 3.6x10{sup -4}. We infer a value for the 2s two-loop Lamb shift in U{sup 89+} of -0.23 eV, from which we estimate a value of -1.27 eV for the 1s two-loop Lamb shift in U{sup 91+}.
- OSTI ID:
- 20699649
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 23 Vol. 95; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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