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Levelcrossing experiments in the first excited1 P 1 states of the alkaline earths

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Zeitschrift für Physik

Abstract

The hyperfine structure of the lowest1P1 state of25Mg,43Ca,87Sr,135Ba and137Ba have been measured by the level-crossing and anticrossing technique. The magnetic dipole and electric quadrupole coupling constants determined by these measurements are25Mg(3s3p1P1):A=− 7.7(5) MHz; 16 MHz>B>0 MHz,43Ca(4s4p1P1):A=− 15.3(4) MHz; ¦B¦<12 MHz,87Sr (5s5p1P1:A=− 3.4(4) MHz;B=39(4) MHz,135Ba(6s6p1P1):A=− 97.5(1.0) MHz;B=31(9)MHz,137Ba(6s6p1P1):A=−109.2(1.2) MHz;B=51(12)MHz. The results have been compared with the predictions of the Breit-Wills theory of the two-electron hyperfine structure using the experimental data on the3P states. Large discrepancies have been observed which are due to different radial wave functions of thes andp electron in the triplet and singlet system. This effect has been taken into account by fitting the data with the aid of two additional parameters. That this procedure is justified is shown by an analysis of the fine structure splitting, the life times, and the isotopic shifts in thesp configurations of group II elements.

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Author notes

  1. H. -Jürgen Kluge

    Present address: Institut für Physik der Universität Mainz, Deutschland

  2. Hatto Sauter

    Present address: Gesellschaft für Kernforschung, IASR, Karlsruhe

Authors and Affiliations

  1. I. Physikalisches Institut der Universität Heidelberg, Deutschland

    H. -Jürgen Kluge & Hatto Sauter

Authors
  1. H. -Jürgen Kluge
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  2. Hatto Sauter
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Additional information

This publication comprises the principal part of the dissertation of H.-J. Kluge.

The authors are indebted to Professor E.-W. Otten for many fruitfull discussions and constant encouragement and support of this work. They are also grateful to Professor W. Happer for making the levelcrossing program available to them.

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Kluge, H.J., Sauter, H. Levelcrossing experiments in the first excited1 P 1 states of the alkaline earths. Z. Physik 270, 295–309 (1974). https://doi.org/10.1007/BF01677766

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  • DOI: https://doi.org/10.1007/BF01677766

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