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Nuclear levels in 228Th populated in the decay of 228Pa (II)

  • Nuclear structure
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The European Physical Journal A - Hadrons and Nuclei Aims and scope Submit manuscript

Abstract:

The electron-capture decay of 228Pa to levels in 228Th was studied using mass-separated sources and a γ-ray detection system consisting of five Compton-suppressed Ge detectors. A total of 87 levels were observed up to an excitation energy of 2 MeV which are connected by approximately 500 γ-ray transitions. The complete octupole quadruplet, three excited K π=0+ bands and two K π=2+ bands were identified below 1.4 MeV. The observed level structure is compared to calculations within the quasiparticle-phonon nuclear model. The surprisingly good agreement indicates that 228Th has less transitional character than hitherto assumed.

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Authors and Affiliations

  1. Institut für Strahlen- und Kernphysik, Universität Bonn, Nussallee 14-16, D-53115 Bonn, Germany, , , , , , DE

    T. Weber, K. Freitag, J. Gröger, C. Günther & P. Herzog

  2. Sektion Physik, Universität München, Am Coulombwall 1, D-85748 Garching, Germany, , , , , , DE

    J. de Boer

  3. Bogolubov Laboratory of Theoretical Physics, Joint Institute of Nuclear Research, 141980 Dubna, Russia, , , , , , RU

    V.G. Soloviev, A.V. Sushkov & N.Yu. Shirikova

Authors
  1. T. Weber
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  2. J. de Boer
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  3. K. Freitag
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  4. J. Gröger
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  5. C. Günther
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  6. P. Herzog
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  7. V.G. Soloviev
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  8. A.V. Sushkov
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  9. N.Yu. Shirikova
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Received: 30 March 1998

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Weber, T., de Boer, J., Freitag, K. et al. Nuclear levels in 228Th populated in the decay of 228Pa (II) . EPJ A 3, 25–48 (1998). https://doi.org/10.1007/s100500050146

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  • DOI: https://doi.org/10.1007/s100500050146

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