High-spin studies of164Lu using EUROBALL
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A new region of superdeformed shapes with a pronounced triaxiality coexisting with normal deformation exists for nuclei withN ~ 94 andZ ~ 71. Calculations with the Ultimate Cranker have revealed that triaxial SD minima with γ ~ ±20° are expected for all symmetry groups (π, α). In an odd-odd nucleus, the possibility exists to exploit the various combinations of proton and neutron orbitals which are expected to sample the triaxial minima differently. A search for such structures was performed as one of the first Euroball experiments using the reaction139La(29Si,4n) with thin self-supporting targets at a beam energy of 145 MeV, provided by the Legnaro XTU tandem accelerator. The preliminary analysis has provided a major extension of the known (normal deformed) level scheme in164Lu, in addition to ~7 new, presumably triaxial, SD bands in164Lu. These bands have dynamical moments of inertia similar to those found in163,165Lu. The new data are compared to expectations from calculations with the code “Ultimate Cranker”.
PACS 21.10Properties of nuclei nuclear energy levels
PACS 23.20.LvGamma transitions and level energies
PACS 25.70Low and intermediate energy heavy-ion reactions
PACS 27.70150 < A < 189
PACS 01.30.CcConference proceedings
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