6533b835fe1ef96bd12a00e0
RESEARCH PRODUCT
Laser spectroscopy measurement of the 2s-hyperfine splitting in lithium-like bismuth
T. KuhlMatthias LochmannMatthias LochmannRodolfo SánchezN. FrömmgenThomas StöhlkerRubén López-cotoR. JöhrenDenis AnielskiMichael BussmannVolker HannenChristopher GeppertChristopher GeppertChristian WeinheimerElisa WillM. HammenRichard C. ThompsonYuri A. LitvinovB. BotermannDanyal WintersZoran AndelkovicJ. VollbrechtAndreas DaxWeiqiang WenWilfried NörtershäuserWilfried Nörtershäusersubject
IONSRINGGeneral PhysicsHydrogenProtonhyperfine structure0205 Optical Physics0307 Theoretical And Computational Chemistrychemistry.chemical_elementBEAMPhysics Atomic Molecular & ChemicalPROTON01 natural sciencesIonBismuthGSI0202 Atomic Molecular Nuclear Particle And Plasma Physicsrelativistic and QED effects in ions0103 physical sciencesPhysics::Atomic PhysicsNuclear Experiment010306 general physicsSpectroscopyHyperfine structureESRPhysicsScience & Technology010308 nuclear & particles physicsPhysicsOpticsHYDROGENCondensed Matter PhysicsAtomic and Molecular Physics and OpticschemistryPhysical Scienceslaser spectroscopyLithiumAtomic physicsTRANSITIONSTORAGEdescription
We have recently reported on the first direct measurement of the $2s$ hyperfine transition in lithium-like bismuth (209Bi80+) at the GSI Helmholtz Centre for Heavy Ion Research in Darmstadt, Germany. Combined with a new measurement of the $1s$ hyperfine splitting (HFS) in hydrogen-like (209Bi82+) the so-called specific difference ${\rm{\Delta }}^{\prime} E=-61.37(36)$ meV could be determined and was found to be in good agreement with its prediction from strong-field bound-state quantum electrodynamics. Here we report on additional investigations performed to estimate systematic uncertainties of these results and on details of the experimental setup. We show that the dominating uncertainty arises from insufficient knowledge of the ion beam velocity which is determined by the electron-cooler voltage. Two routes to obtain a cooler-voltage calibration are discussed and it is shown that agreement can be reached either between the experimental ${\rm{\Delta }}^{\prime} E$ and the theoretical result, or between the two measurements of the HFS in hydrogen-like bismuth, but not both at the same time.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-03-01 | Journal of Physics B: Atomic, Molecular and Optical Physics |