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The magnetic moment of the 10+ isomer in140Ce andE1 transitions inN=82 isotones caused by outer subshell configurations

  • Nuclear Structure and Spectroscopy
  • Published:
Zeitschrift für Physik A Atomic Nuclei

Abstract

Using the reaction138Ba(α,2n)140Ce the magnetic moment of the 10 +1 isomer atE x =3714.7 keV in theN=82 nucleus140Ce has been determined by means of the TDPAD method toμ=+10.3(4)μ N . Measuredg-factors in140Ce are compared to calculations within the shell model with configuration mixing. For the 10 +1 isomer in140Ce the four proton configuration π(1g 2/27 ,2d 2/25 ) has been found to be dominant. From theg-factor measurement strong contributions of multiparticle excitations to thegp2d 3/2,π3s 21 or π1h 211 shells and admixtures of neutron excitations to the wave function of the 10 +1 state could be excluded. The strongE1γ-branch of the deexcitation of the 10 +1 isomer in140Ce can be explained by means of small admixtures of configurations which contain the outer subshell excitationsπ2f 7/2 andπ1h 9/2. On this basisE1 transitions experimentally observed in theN=82 nuclei140Ce,141Pr and145Eu may be understood.

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Authors and Affiliations

  1. Zentralinstitut für Kernforschung Rossendorf, Dresden, German Democratic Republic

    L. Käubler, W. Enghardt & H. Prade

  2. Research Institute of Physics, Stockholm, Sweden

    P. Carlé, L. O. Norlin, K. -G. Rensfelt & U. Rosengård

  3. Royal Institute of Technology, Stockholm, Sweden

    U. Rosengård

Authors
  1. L. Käubler
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  2. W. Enghardt
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  3. H. Prade
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  4. P. Carlé
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  5. L. O. Norlin
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  6. K. -G. Rensfelt
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  7. U. Rosengård
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Käubler, L., Enghardt, W., Prade, H. et al. The magnetic moment of the 10+ isomer in140Ce andE1 transitions inN=82 isotones caused by outer subshell configurations. Z. Physik A - Atomic Nuclei 329, 143–150 (1988). https://doi.org/10.1007/BF01283769

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  • DOI: https://doi.org/10.1007/BF01283769

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