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Determination of isotope shift crossed-second-order-effects and hyperfine-structure parameters in the Eu I configuration 4f 7 6s7s

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

In the Eu I configuration 4f 7(8 S)6s7s the isotope shift (IS) and hyperfine-structure (hfs) of the levelse 8 S 7/2 andf 8 S 7/2 were determined from the transitions 684.5 nm, 733.7 nm and 821.0 nm to 4f 76s6p. Together with experimental results of our previous measurements a theoretical analysis of the IS and hfs for the complete configuration 4f 7 6s7s can now be carried out.

From the IS of the four 6s7s-levels we evaluated the two crossed-second-order-parametersg 3(4f,6s)= −l.l(l)mK andg 3(4f, 7s)= −0.1(l)mK. The ratiog 3/G 3 is determined for various Eu configurations and found to be equal to 5.6(3)·10−6 in complete agreement with a theoretical value following from Hartree-Fock calculations.

The single electron hfs splitting constantsa 10(4f)= −1.9 (3) mK,a 10(6s)=396(3)mK, anda 10(7s)=65(3)mK are also determined and compared with those of other Eu configurations.

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Authors and Affiliations

  1. Optisches Institut der Technischen Universität Berlin, Germany

    J. -R. Kropp, H. -D. Kronfeldt & R. Winkler

Authors
  1. J. -R. Kropp
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  2. H. -D. Kronfeldt
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  3. R. Winkler
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Additional information

Dedicated to Prof. Dr. Karl Krebs, Berlin, on the occasion of his 75th birthday

We are extremely grateful to Dr. J.-F. Wyart, Orsay, for transmitting us his detailed fine structure calculations and permitting us to use them prior to publication.

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Kropp, J.R., Kronfeldt, H.D. & Winkler, R. Determination of isotope shift crossed-second-order-effects and hyperfine-structure parameters in the Eu I configuration 4f 7 6s7s . Z Physik A 321, 365–369 (1985). https://doi.org/10.1007/BF01411965

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  • DOI: https://doi.org/10.1007/BF01411965

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