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Lifetimes of triaxial superdeformed states in 163Lu and 164Lu |
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| Authors: | G Schönwaßer H Hübel GB Hagemann J Domscheit A Görgen B Herskind G Sletten JN Wilson DR Napoli C Rossi-Alvarez D Bazzacco R Bengtsson H Ryde PO Tjøm SW Ødegård |
| Institution: | Institut für Strahlen und Kernphysik, Nussallee 14-16, Universit?t Bonn, D-53115 Bonn, Germany, DE The Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen ?, Denmark, DK Laboratori Nazionali di Legnaro, INFN, I-35020 Legnaro, Italy, IT Dipartimento di Fisica and INFN, I-35131 Padua, Italy, IT Department of Mathematical Physics, Lund Institute of Technology, S-22362 Lund, Sweden, SE Department of Physics, University of Lund, S-22362 Lund, Sweden, SE Department of Physics, University of Oslo, PB 1048 Blindern, N-0316 Oslo, Norway, NO |
| Abstract: | Lifetimes of states in the yrast superdeformed bands of 163Lu and 164Lu were determined in a Doppler-shift attenuation-method experiment. From fractional Doppler shifts and line shapes, average transition quadrupole moments, Q t = 8.2-0.6 +1.0 b and 7.1-0.6 +0.5 b, were deduced for one of the bands in 163Lu and 164Lu, respectively. These values are much larger than the quadrupole moment of the normal-deformed yrast band in 163Yb, Q t = 4.9-0.4 +1.3 b, that was also determined in this experiment. Comparison to cranking calculations indicates that both superdeformed bands correspond to a local potential energy minimum with a pronounced triaxiality, γ∼ 20°. Received: 8 November 2001 / Accepted: 9 January 2002 |
| Keywords: | PACS 21 10 -k Properties of nuclei nuclear energy levels – 21 10 Tg Lifetimes – 25 70 -z Low and intermediate energy heavy-ion reactions – 27 70 +q 150 ?A? 189 |
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