Abstract
Clouds of stable and unstable Eu+ isotopes have been confined in a Paul trap, each containing about 105 particles. In a microwave-optical double resonance experiment several hyperfine separations in the 4f7 6s 7S3 exited level have been measured with the experimental uncertainties ranging between 10-8 and 3×10-6. These experiments have confirmed that also in the case of an excited level with a large number of hyperfine or Zeeman sublevels the microwave-optical double resonance technique in a Paul trap can be useful for precise hyperfine structure investigation. The hyperfine coupling constants A and B have been determined for the isotopes 153Eu+, 151Eu+, 150Eu+ and 148Eu+. The results complement earlier measurements on the ground state of Eu+ and give additional information on the hyperfine anomaly in the Eu isotopic chain.
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The ISOLDE collaboration / CERN., Enders, K., Stachowska, E. et al. Hyperfine structure measurements in the 7S3 metastable finestructure level in stable and unstable Eu+ isotopes. Z Phys D - Atoms, Molecules and Clusters 42, 171–175 (1997). https://doi.org/10.1007/s004600050350
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DOI: https://doi.org/10.1007/s004600050350