2018 Impact factor 2.481
Hadrons and Nuclei
Eur. Phys. J. A 9, 29-34

Magnetic properties of the $\mathsf\nu j_{15/2}$ intruder orbital in the superdeformed minimum of \ensuremath{\mathsf{^{197}Pb}}

N. Buforn1 - A. Astier1 - R. Duffait1 - M. Meyer1 - S. Perriès1 - A. Prévost1 - N. Redon1 - O. Stézowski1 - A. Goergen2 - H. Hübel2 - E. Mergel2 - S. Neumann2 - D. Rossbach2 - N. Nenoff2 - G. Schoenwasser2 - A. Bauchet3 - I. Deloncle3 - M.G. Porquet3 - A.N. Wilson4 - R. Lucas5 - F.A. Beck6 - D. Curien6 - G. Duchêne6 - B.J.P. Gall6 - N. Kintz6 - J.P. Vivien6 - D.M. Cullen7

1 IPN Lyon, IN2P3/CNRS, Université Lyon-1, F-69622 Villeurbanne Cedex, France
2 Institut für Strahlen- und Kernphysik, Universität Bonn, Nussallee 14-16, D-53115 Bonn, Germany
3 CSNSM Orsay, IN2P3/CNRS, Université Paris-Sud, F-91405 Orsay Campus, France
4 Department of Physics, University of York, York Y01 5DD, UK
5 CEA/Saclay, DAPNIA/SPhN, F-91191 Gif-sur-Yvette, France
6 IReS Strasbourg, IN2P3/CNRS, Université Louis Pasteur, F-67037 Strasbourg, France
7 Oliver Lodge Laboratory, Department of Physics, University of Liverpool, Liverpool L69 7ZE, UK

Received: 14 June 2000 / Revised version: 29 August 2000
Communicated by D. Schwalm

This work has established eight cross-talk transitions between the two signature partner superdeformed (SD) bands in 197Pb with the EUROBALL IV spectrometer. Directional correlations from oriented states measurements confirm the $\Delta I = 1$ character of these transitions. The flat behaviour of the dynamical moment of inertia and the agreement between the experimental and microscopic HF+BCS values of $\left( g_K-g_R\right) K/Q_0$ suggest that the configuration of the SD bands is based upon the $\nu [752]5/2^-$ neutron intruder orbital. The derived effective spin gyromagnetic factor $g_s^{\rm eff}$ is found to be not quenched, and is close to the theoretical $g_s^{\rm free}$ value.

21.10.Re Collective levels - 23.20.En Angular distribution and correlation measurements - 23.20.Lv Gamma transitions and level energies - 27.80.+w 190 $\leq$ A $\leq$ 219

Copyright Società Italiana di Fisica, Springer-Verlag 2000