Measurement of the Two-Loop Lamb Shift in Lithiumlike U{sup 89+}

Journal Article · Fri Dec 02 00:00:00 EST 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.233003· OSTI ID:20699649

Beiersdorfer, P; Chen, H; Thorn, D B; Traebert, E ^[1]

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1. 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, Vol. 95, Issue 23; Other Information: DOI: 10.1103/PhysRevLett.95.233003; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CATIONS
ELECTRON BEAMS
LAMB SHIFT
MULTICHARGED IONS
QUANTUM ELECTRODYNAMICS
TRAPS
URANIUM IONS