DAPNIA-07-122 |
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Spectroscopy of the very neutron-deficient 189Bi |
C. Dossat, Ch. Theisen, A. Bürger, E. Clément, A. Görgen, W. Korten, S. Eeckhaudt, P. Jones, T. Grahn, P.T. Greenlees, R. Julin, S. Juutinen, M. Leino, A.-P. Leppänen, M. Nyman, J. Pakarinen, P. Rahkila, J. Sarén, C. Scholey, J. Sorri, J. Uusitalo and M. Venhart |
The neutron-deficient isotope 189Bi has been studied at the University of Jyväskylä using alpha-decay, isomer and prompt gamma-ray spectroscopy. The structure of 189Bi can be understood by the coupling of an unpaired proton to the 188Pb core, in which spherical, prolate, and oblate shapes were found to coexist. Improved data on alpha-decay and prompt gamma-ray spectroscopy have been obtained, giving urther insight into the shape coexistence phenomenon in the neutron deficient lead region. |