Eur. Phys. J. A 15, 435-437 (2002)
DOI: 10.1140/epja/i2002-10097-5

Short Note

Comparative quadrupole moments of triaxial superdeformed states in

G. Schönwaßer¹, H. Hübel¹, G.B. Hagemann², H. Amro³, R.M. Clark⁴, M. Cromaz⁴, R.M. Diamond⁴, P. Fallon⁴, B. Herskind², G. Lane⁴, W.C. Ma³, A.O. Macchiavelli⁴, S.W. Ødegå rd⁵, G. Sletten², D. Ward⁴ and J.N. Wilson<sup>2

1</sup>  Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Nussallee 14-16, D-53115 Bonn, Germany
²  Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen Ø, Denmark
³  Mississipi State University, Mississipi State, MS 39762, USA
⁴  Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
⁵  Department of Physics, University of Oslo, PB 1048 Blindern, N-0316 Oslo, Norway

schoenwa@iskp.uni-bonn.de

(Received: 12 August 2002 / Revised version: 16 October 2002 / Published online: 10 December 2002)

Abstract
Average transition quadrupole moments in the yrast triaxial superdeformed bands of ¹⁶³Lu, ¹⁶⁴Lu and ¹⁶⁵Lu were determined in a Doppler-shift attenuation-method experiment. Fractional Doppler shifts were determined in -ray coincidence spectra measured with the Gammasphere array. The transition quadrupole moments derived from these data show a decrease from ¹⁶³Lu to ¹⁶⁵Lu which is not predicted by total-energy surface calculations.

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 - .

© Società Italiana di Fisica, Springer-Verlag 2002