Title: Precision Test of Many-Body QED in the Be+ 2p Fine Structure Doublet Using Short-Lived Isotopes
Authors: Noetershaeuser, Wilfried ×
Geppert, Christopher
Krieger, Andreas
Pachucki, Krzysztof
Puchalski, Mariusz
Blaum, Klaus
Bissell, Mark
Froemmgen, Nadja
Hammen, Michael
Kowalska, Magdalena
Kraemer, Joerg
Kreim, Kim
Neugart, Rainer
Neyens, Gerda
Sanchez, Rodolfo
Yordanov, Deyan T #
Issue Date: 13-Jul-2015
Publisher: American Physical Society
Series Title: Physical Review Letters vol:115 issue:3
Article number: 033002
Abstract: Absolute transition frequencies of the 2s S-2(1/2) -> 2p P-2(1/2,3/2) transitions in Be+ were measured for the isotopes Be-7,Be-9-12. The fine structure splitting of the 2p state and its isotope dependence are extracted and compared to results of ab initio calculations using explicitly correlated basis functions, including relativistic and quantum electrodynamics effects at the order of ma(6) and ma(7) x ln a. Accuracy has been improved in both the theory and experiment by 2 orders of magnitude, and good agreement is observed. This represents one of the most accurate tests of quantum electrodynamics for many-electron systems, being insensitive to nuclear uncertainties.
ISSN: 0031-9007
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
× corresponding author
# (joint) last author

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