Lifetimes of triaxial superdeformed states in 163Lu and 164Lu

Autor: G. Sletten, B. Herskind, J. N. Wilson, Ragnar Bengtsson, D. Bazzacco, G.B. Hagemann, S. W. Ødegård, G. Schönwaßer, Andreas Görgen, P.O. Tjøm, D. R. Napoli, J. Domscheit, H. Ryde, H. Hübel, C. Rossi-Alvarez
Rok vydání: 2002
Předmět:
Zdroj: The European Physical Journal A. 13:291-296
ISSN: 1434-601X
1434-6001
Popis: 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°.
Databáze: OpenAIRE
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