Eur. Phys. J. A 16, 155-158 (2003)
DOI: 10.1140/epja/i2002-10117-6

Short Note

First evidence for triaxial superdeformation in and

P. Bringel¹, H. Hübel¹, H. Amro², M. Axiotis³, D. Bazzacco⁴, S. Bhattacharya⁵, R. Bhowmik⁶, J. Domscheit¹, G.B. Hagemann⁷, D.R. Jensen⁷, Th. Kröll³, S. Lunardi⁴, D.R. Napoli³, A. Neußer¹, S.C. Pancholi⁸, C.M. Petrache⁹, G. Schönwaßer¹, A.K. Singh¹ and C. Ur<sup>4

1</sup>  Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Nußallee 14-16, D-53115 Bonn, Germany
²  Department of Physics, Mississippi State University, MS 39762, USA
³  INFN, Laboratori Nazionali di Legnaro, Via Romea 4, I-35020 Legnaro, Italy
⁴  Dipartimento di Fisica and INFN, Via F. Marzolo 8, I-35131 Padova, Italy
⁵  Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata-700064, India
⁶  Nuclear Science Centre, Aruna Asaf Ali Marg, New Delhi-110067, India
⁷  Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen, Denmark
⁸  Department of Physics & Astronomy, Delhi University, Delhi-110007, India
⁹  Dipartimento di Fisica, Università di Camerino, Via Madonna delle Carceri, I-62032 Camerino, Italy

bringel@iskp.uni-bonn.de

(Received: 18 October 2002 / Revised version: 15 November 2002 / Published online: 4 February 2003)

Abstract
High-spin states in ¹⁶¹Lu and ¹⁶²Lu have been investigated using the GASP -ray spectrometer array. Excited states in these nuclei have been populated through the ¹⁰⁰Mo( ⁶⁵Cu, xn) reaction at a beam energy of 260 MeV. Four presumably triaxial superdeformed bands, three in ¹⁶²Lu and one in ¹⁶¹Lu, have been observed. This is the first evidence for triaxial superdeformation in the two isotopes.

PACS
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 2003