6533b85afe1ef96bd12b9e77
RESEARCH PRODUCT
Precision Test of Many-Body QED in theBe+2pFine Structure Doublet Using Short-Lived Isotopes
Krzysztof PachuckiDeyan T. YordanovMariusz PuchalskiMariusz PuchalskiKlaus BlaumRodolfo SánchezA. KriegerA. KriegerK. KreimRainer NeugartN. FrömmgenMark BissellGerda NeyensJ. KrämerM. HammenChristopher GeppertChristopher GeppertMagdalena KowalskaWilfried Nörtershäusersubject
PhysicsOrders of magnitude (time)Ab initio quantum chemistry methodsShort lived isotopesStructure (category theory)General Physics and AstronomyOrder (ring theory)Fine structureState (functional analysis)Atomic physicsHyperfine structuredescription
Absolute transition frequencies of the $2s\text{ }{^{2}S}_{1/2}\ensuremath{\rightarrow}2p\text{ }{^{2}P}_{1/2,3/2}$ transitions in ${\mathrm{Be}}^{+}$ were measured for the isotopes $^{7,9--12}\mathrm{Be}$. 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 $m{\ensuremath{\alpha}}^{6}$ and $m{\ensuremath{\alpha}}^{7} \mathrm{ln} \ensuremath{\alpha}$. 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-07-13 | Physical Review Letters |