2018 Impact factor 2.481
Hadrons and Nuclei


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 $\chem{^{163}Lu}$

S.W. Ødegård1, 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. Curien4

1  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 $E_{\gamma}\mbox{-}E_{\gamma}$ 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 $\approx 40$ and $\approx 20$, 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 - $150 \leq A \leq 189$ .

© Società Italiana di Fisica, Springer-Verlag 2002