Eur. Phys. J. A 10, 275-287
Yrast level structure of the neutron-deficient N = 80 isotones 146Dy, 147Ho and 148Er up to high-spin valuesH.A. Roth1, S.E. Arnell1, D. Foltescu1, Ö. Skeppstedt1, J. Blomqvist2, G. de Angelis3, D. Bazzacco4 and S. Lunardi4
1 Department of Physics, Chalmers University of Technology, and the University of Gothenburg, S-41296 Göteborg, Sweden
2 Department of Physics, The Royal Institute of Technology, S-10405 Stockholm, Sweden
3 Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
4 Dipartimento di Fisica dell'Università, and Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy
(Received: 12 January 2001 / Revised version: 10 April 2001 Communicated by D. Schwalm)
High-spin level schemes of the N = 80 isotones 146Dy, 147Ho and 148Er have been investigated by in-beam -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 , MeV in 146Dy, , MeV in 147Ho and , MeV in 148Er. The results are discussed in terms of the spherical shell model. Many of the levels can be described within this framework.
23.20.Lv - transitions and level energies.
25.70.Jj - Fusion and fusion-fission reactions.
21.60.Cs - Shell model.
27.60.+j - .
© Società Italiana di Fisica, Springer-Verlag 2001