First evidence for triaxial superdeformation in andP. 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. Ur4
1 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
(Received: 18 October 2002 / Revised version: 15 November 2002 / Published online: 4 February 2003)
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.
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