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Experimental studies of the level scheme of143Eu and a generalized decoupling model description

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

Excited levels of143Eu have been investigated by nuclear spectroscopy methods. We measured γ-rays and conversion electron singles spectra as well asγγ-coincidences from mass separated143mGd sources (108 s) prepared after the irradiation of144Sm with 78 MeVα-particles. In addition in-beam data were obtained by measuringγ-ray singles spectra, angular distributions andγγ-coincidences, following the144Sm(α, 4n+ p, γ) reaction. A level scheme for143Eu comprising 19 levels is proposed, spin assignments or at least restrictions are given. The deduced experimental level scheme can be reproduced semiquantitatively by a generalized decoupling model which takes into account an asymmetric deformation of the core and a variable moment of inertia. Additionally, the results are discussed in the limit of the weak coupling model.

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Authors and Affiliations

  1. Kernforschungszentrum Karlsruhe, IAK, Germany

    K. Wisshak, A. Hanser, H. Klewe-Nebenius, J. Buschmann, H. Rebel & H. Faust

  2. Physikalisches Institut der Universität Heidelberg, Germany

    K. Wisshak, A. Hanser, H. Klewe-Nebenius, J. Buschmann, H. Rebel & H. Faust

  3. Kernforschungsanlage Jülich, IKP and Universität Bonn, Germany

    H. Toki & Amand Fäßler

  4. Institut für Kernphysik der Kernforschungsanlage Jülich GmbH, Postfach 1913, D-5170, Jülich 1, Federal Republic of Germany

    H. Toki & Amand Fäßler

Authors
  1. K. Wisshak
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  2. A. Hanser
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  3. H. Klewe-Nebenius
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  4. J. Buschmann
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  5. H. Rebel
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  6. H. Faust
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  7. H. Toki
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  8. Amand Fäßler
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Additional information

We gratefully acknowledge the good cooperation of Dr. J. van Klinken and coworkers during the in-beam (γ, t)-experiments at the cyclotron of the KVI in Groningen (The Netherlands). We thank Mr. B. Feurer for his strong efforts in preparing the mass separated sources. The Bundesministerium für Forschung und Technologie has supported this work.

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Wisshak, K., Hanser, A., Klewe-Nebenius, H. et al. Experimental studies of the level scheme of143Eu and a generalized decoupling model description. Z Physik A 277, 129–139 (1976). https://doi.org/10.1007/BF01433704

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  • DOI: https://doi.org/10.1007/BF01433704

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