Eur. Phys. J. A 14, 309-316 (2002)
DOI: 10.1140/epja/i2002-10012-2

Count fluctuation analysis in the triaxial strongly deformed potential well of

S.W. Ødegård^{1, 2}, B. Herskind², T. Døssing², G.B. Hagemann², D.R. Jensen², G. Sletten², J.N. Wilson², S. Leoni³, P.O. Tjøm¹, P. Bednarczyk⁴ and D. Curien<sup>4

1</sup>  Department of Physics, University of Oslo, PB 1048 Blindern, N-0316 Oslo, Norway
²  The Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen Ø, Denmark
³  Dipartimento di Fisica and INFN, Sezione di Milano, Milano, Italy
⁴  IReS, 23 rue du Loess, BP28 F-67037, Strasbourg, France

s.w.odegard@fys.uio.no

(Received: 4 January 2002 / Revised version: 22 April 2002 Communicated by C. Signorini)

Abstract
High-spin properties of the triaxial strongly deformed potential well in ¹⁶³Lu at excitation energies above resolvable bands have been investigated. Gated spectra display clear ridges with moments of inertia corresponding to those observed for the discrete strongly deformed bands. A fluctuation analysis of the ridges yields a number of two-step paths of and , when gating on triaxial strongly or normally deformed bands, respectively. These results show that a potential well at large deformation coexists with the normally deformed well, and indicate a mixing between states in the two wells at higher excitation energy.

PACS
21.10.-k - Properties of nuclei; nuclear energy levels.
21.10.Re - Collective levels.
24.60.Ky - Fluctuation phenomena.
27.70.+q - .

© Società Italiana di Fisica, Springer-Verlag 2002