First triaxial superdeformed band inA. Neußer1, H. Hübel1, G.B. Hagemann2, S. Bhattacharya3, P. Bringel1, D. Curien4, O. Dorvaux4, J. Domscheit1, F. Hannachi5, D.R. Jensen2, A. Lopez-Martens5, E. Mergel1, N. Nenoff1 and A.K. Singh1
1 Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Nussallee 14-16, D-53115 Bonn, Germany
2 Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen, Denmark
3 Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700 064, India
4 Institut de Recherches Subatomiques, 23 Rue du Loess, F-67037 Strasbourg, France
5 Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, F-91405 Orsay Campus, France
(Received: 11 September 2002 / Published online: 10 December 2002)
First evidence is presented for triaxial superdeformation in 170Hf. High-spin states in this nucleus have been investigated in a -ray coincidence measurement using the EUROBALL spectrometer array. A new band was discovered which has moments of inertia that are very similar to the ones of triaxial superdeformed bands in neighbouring Hf and Lu nuclei. The intensities with which these bands are populated are different from what may be expected from calculated potential-energy minima.
21.10.-k - Properties of nuclei; nuclear energy levels.
23.20.Lv - Gamma transitions and level energies.
25.70.-z - Low and intermediate energy heavy-ion reactions.
27.70.+q - .
© Società Italiana di Fisica, Springer-Verlag 2002