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Yrast level structure of the neutron-deficient N = 80 isotones 146Dy, 147Ho and 148Er up to high-spin values

  • H.A. Roth
  • S.E. Arnell
  • D. Foltescu
  • Ö. Skeppstedt
  • J. Blomqvist
  • G. de Angelis
  • D. Bazzacco
  • S. Lunardi

Abstract:

High-spin level schemes of the N = 80 isotones 146Dy, 147Ho and 148Er have been investigated by in-beam γ-ray spectroscopic methods using the NORDBALL Compton-suppressed multidetector array including proton and neutron selection. The projectile-target system 58Ni + 92Mo at 260 MeV beam energy has been used to produce the neutron-deficient N = 80 isotones. The previously known schemes have been extended to considerably higher spin and exitation energy, up to I = 23?, Ex≈ 8.9 MeV in 146Dy, I = 53/2?, Ex≈ 8.7 MeV in 147Ho and I = 23?, Ex≈ 9.6 MeV in 148Er. The results are discussed in terms of the spherical shell model. Many of the levels can be described within this framework.

PACS. 23.20.Lv γ transitions and level energies – 25.70.Jj Fusion and fusion-fission reactions – 21.60.Cs Shell model – 27.60.+j 90≤A≤149 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2001

Authors and Affiliations

  • H.A. Roth
    • 1
  • S.E. Arnell
    • 1
  • D. Foltescu
    • 1
  • Ö. Skeppstedt
    • 1
  • J. Blomqvist
    • 2
  • G. de Angelis
    • 3
  • D. Bazzacco
    • 4
  • S. Lunardi
    • 4
  1. 1.Department of Physics, Chalmers University of Technology, and the University of Gothenburg, S-41296 Göteborg, SwedenSE
  2. 2.Department of Physics, The Royal Institute of Technology, S-10405 Stockholm, SwedenSE
  3. 3.Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, ItalyIT
  4. 4.Dipartimento di Fisica dell'Università, and Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, ItalyIT

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