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Hyperfine structure in the 6p5d configuration and isotope shifts in transitions between the 6s5d and the 6p5d configurations in Ba I

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

High-resolution laser fluorescence spectroscopy, using a single-mode dye laser acting on a collimated atomic beam, has been performed to determine the hyperfine-structure (hfs) constants in six states of the 6p 5d configuration of135Ba and137Ba. Isotope shifts (IS) for eleven transitions between the 6s 5d and the 6p 5d configurations have also been measured. From an analysis of the energy levels, intermediate angular wavefunctions have been deduced. The wavefunctions are used to evaluate experimental hyperfine parameters from the experimental hfs constants. The parameters are, for the magnetic-dipole interaction compared with theoretical values, and for the electricquadrupole interaction used to estimate the nuclear quadrupole moments for the odd isotopes.

The IS in the measured transitions are analysed using a King-plot, with the first resonance line in Ba II as the reference. Specific mass and field shifts are evaluated for the measured transitions. The field shifts have been used to determine the change in mean-square radius between the natural abundant Ba-isotopes.

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Authors and Affiliations

  1. Department of Physics, Chalmers University of Technology, Göteborg, Sweden

    P. Grundevik, H. Lundberg, L. Nilsson & G. Olsson

Authors
  1. P. Grundevik
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  2. H. Lundberg
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  3. L. Nilsson
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  4. G. Olsson
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Additional information

The authors gratefully acknowledge many stimulating discussions with Professor I. Lindgren, Dr. A. Rosén, Dr. S. Salomonson and Professor S. Svanberg. This work was financially supported by the Swedish Natural Science Research Council.

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Grundevik, P., Lundberg, H., Nilsson, L. et al. Hyperfine structure in the 6p5d configuration and isotope shifts in transitions between the 6s5d and the 6p5d configurations in Ba I. Z Physik A 306, 195–209 (1982). https://doi.org/10.1007/BF01415122

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  • DOI: https://doi.org/10.1007/BF01415122

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