6533b7dbfe1ef96bd127133a
RESEARCH PRODUCT
An improved value for the hyperfine splitting of hydrogen-like209Bi82+
R.c.a. ThompsonAndreas DaxChristian WeinheimerMatthias SchmidtRodolfo SánchezStefan E. SchmidtStefan E. SchmidtS. KaufmannZoran AndelkovicJohannes UllmannJohannes UllmannJ. VollbrechtW. GeithnerB. MaassMatthias LochmannJ. MeisnerThomas StöhlkerWilfried NörtershäuserC. GeppertYuri A. LitvinovMarkus SteckVolker HannenC. GorgesT. MurböckKristian KönigM. Hammensubject
Physicschemistry.chemical_elementElectronCondensed Matter PhysicsSpace chargeAtomic and Molecular Physics and OpticsMagnetic fieldBismuthIonchemistryAtomic physicsSpectroscopyHyperfine structureOrder of magnitudedescription
We report an improved measurement of the hyperfine splitting in hydrogen-like bismuth (209Bi82+) at the experimental storage ring ESR at GSI by laser spectroscopy on a coasting beam. Accuracy was improved by about an order of magnitude compared to the first observation in 1994. The most important improvement is an in situ high voltage measurement at the electron cooler (EC) platform with an accuracy at the 10 ppm level. Furthermore, the space charge effect of the EC current on the ion velocity was determined with two independent techniques that provided consistent results. The result of nm provides an important reference value for experiments testing bound-state quantum electrodynamics in the strong magnetic field regime by evaluating the specific difference between the splittings in the hydrogen-like and lithium-like ions.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-05-28 | Journal of Physics B: Atomic, Molecular and Optical Physics |