https://doi.org/10.1140/epja/i2004-10124-7
Prolate structures in 189Po and 185Pb
1
Instituut voor Kern- en Stralingsfysica, University of Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium
2
Oliver Lodge Laboratory, University of Liverpool, L69 7ZE, Liverpool, UK
3
Gesellschaft für Schwerionenforschung, Planckstrasse 1, 64291, Darmstadt, Germany
4
Department of Physics, Royal Institute of Technology, 104 05, Stockholm, Sweden
5
Department of Physics, University of Jyväskylä, 40014, Jyväskylä, Finland
6
Flemish Institute for Technological Research (VITO), Boeretang 200, 2400, Mol, Belgium
7
TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C., Canada
8
Johannes Gutenberg Universität Mainz, 55099, Mainz, Germany
9
Physikalisches Institut, J.W. Goethe-Universität, 60054, Frankfurt, Germany
* e-mail: karen.vandevel@vito.be
Received:
15
April
2004
Accepted:
10
January
2005
Published online:
25
January
2005
The 3/2- isomer in 185Pb and states above it have been populated in the α-decay of 189Po. The observed α-decay strengths to and the electromagnetic decay properties of the excited states in 185Pb have been combined with Potential Energy Surface and Particle-Plus-Rotor calculations to propose configuration assignments. It is suggested that the α-decaying isomer of 189Po is of prolate origin and that the prolate configuration becomes very low in energy in 185Pb.
PACS: 23.20.Lv γ transitions and level energies – / 23.20.Nx Internal conversion and extranuclear effects – / 23.60.+e α decay – / 27.70.+q 150 ⩽ A ⩽ 189 –
© Società Italiana di Fisica and Springer-Verlag, 2005