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Quadrupole moments of radium isotopes from the 7p 2 P 3/2 hyperfine structure in Ra II

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Zeitschrift für Physik D Atoms, Molecules and Clusters

Abstract

The hyperfine structure and isotope shift of221–226Ra and212,214Ra have been measured in the ionic (Ra II) transition 7s 2 S 1/2–7p 2 P 3/2 (λ=381.4 nm). The method of on-line collinear fast-beam laser spectroscopy has been applied using frequency-doubling of cw dye laser radiation in an external ring cavity. The magnetic hyperfine fields are compared with semi-empirical and ab initio calculations. The analysis of the quadrupole splitting by the same method yields the following, improved values of spectroscopic quadrupole moments:Q s (221Ra)=1.978(7)b,Q s (223Ra)=1.254(3)b and the reanalyzed valuesQ s (209Ra)=0.40(2)b,Q s (211Ra)=0.48(2)b,Q s (227Ra)=1.58(3)b,Q s (229Ra)=3.09(4)b with an additional scaling uncertainty of ±5%. Furthermore, theJ-dependence of the isotope shift is analyzed in both Ra II transitions connecting the 7s 2 S 1/2 ground state with the first excited doublet 7p 2 P 1/2 and 7p 2 P 3/2.

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Author notes

  1. H. J. Kluge

    Present address: Institut für Physik, Universität Mainz, D-6500, Mainz, Federal Republic of Germany

  2. W. Neu

    Present address: CERN, CH-1211, Geneva 23, Switzerland

  3. G. Ulm

    Present address: Physikalisch-Technische Bundesanstalt, D-1000, Berlin 10, Germany

Authors and Affiliations

  1. Institut für Physik, Universität Mainz, D-6500, Mainz, Federal Republic of Germany

    W. Neu, R. Neugart, E. W. Otten, G. Passler & K. Wendt

  2. Fachbereich Physik, Gesamthochschule Kassel, D-3500, Kassel, Federal Republic of Germany

    B. Fricke

  3. CERN, CH-1211, Geneva 23, Switzerland

    E. Arnold, H. J. Kluge & G. Ulm

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  1. W. Neu
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  2. R. Neugart
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Neu, W., Neugart, R., Otten, E.W. et al. Quadrupole moments of radium isotopes from the 7p 2 P 3/2 hyperfine structure in Ra II. Z Phys D - Atoms, Molecules and Clusters 11, 105–111 (1988). https://doi.org/10.1007/BF01444425

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  • DOI: https://doi.org/10.1007/BF01444425

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