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Yrast level structure of the neutron-deficient N = 80 isotones 146Dy, 147Ho and 148Er up to high-spin values |
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| Authors: | HA Roth SE Arnell D Foltescu Ö Skeppstedt J Blomqvist G de Angelis D Bazzacco S Lunardi |
| Institution: | Department of Physics, Chalmers University of Technology, and the University of Gothenburg, S-41296 G?teborg, Sweden, SE Department of Physics, The Royal Institute of Technology, S-10405 Stockholm, Sweden, SE Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy, IT Dipartimento di Fisica dell'Università, and Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy, IT |
| 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?, E x≈ 8.9 MeV in 146Dy, I = 53/2?, E x≈ 8.7 MeV in 147Ho and I = 23?, E x≈ 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. Received: 12 January 2001 / Accepted: 11 April 2001 |
| Keywords: | 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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