DOI: 10.1140/epja/i2002-10032-x
Isomeric states in proton-unbound
isotopes
A. Hürstel1, M. Rejmund1, E. Bouchez1, P.T. Greenlees2, K. Hauschild1, S. Juutinen2, H. Kettunen2, W. Korten1, Y. Le Coz1, P. Nieminen2, Ch. Theisen1, A.N. Andreyev3, F. Becker1, T. Enqvist2, P.M. Jones2, R. Julin2, H. Kankaanpää2, A. Keenan2, P. Kuusiniemi2, M. Leino2, A.-P. Leppänen2, M. Muikku2, J. Pakarinen2, P. Rahkila2 and J. Uusitalo2
1 DAPNIA/SPhN CEA-Saclay 91191 Gif-sur-Yvette Cedex, France
2 JYFL, University of Jyväskylä, Finland
3 Department of Physics, University of Liverpool, UK
(Received: 2 May 2002 / Published online: 19 November 2002)
Abstract
Prompt and delayed gamma-ray spectroscopy of very neutron-deficient bismuth
isotopes
has been performed using the Recoil Decay Tagging (RTD)
method.
The isomeric
i13/2 states have been identified and their lifetimes have
been measured. The systematics of these long-lived
M2 isomers has been extended
to the proton-unbound isotopes. The general behaviour of single-proton states is
discussed within the systematics and interpreted within the shell-model framework.
23.20.Lv - Gamma transitions and level energies.
27.70.+q -

21.10.Tg - Lifetimes.
© Società Italiana di Fisica, Springer-Verlag 2002