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Isomeric states in proton-unbound 187, 189Bi isotopes |
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| Authors: | A Hürstel M Rejmund E Bouchez PT Greenlees K Hauschild S Juutinen H Kettunen W Korten Y Le Coz P Nieminen Ch Theisen AN Andreyev F Becker T Enqvist PM Jones R Julin H Kankaanpää A Keenan P Kuusiniemi M Leino A-P Leppänen M Muikku J Pakarinen P Rahkila J Uusitalo |
| Institution: | DAPNIA/SPhN CEA-Saclay 91191 Gif-sur-Yvette Cedex, France, FR JYFL, University of Jyv?skyl?, Finland, FI Department of Physics, University of Liverpool, UK, GB |
| Abstract: | Prompt and delayed gamma-ray spectroscopy of very neutron-deficient bismuth isotopes 187, 189Bi has been performed using the Recoil Decay Tagging (RTD) method. The isomeric i 13/2 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. Received: 2 May 2002 / Accepted: 3 June 2002 / Published online: 19 November 2002 RID="a" ID="a"e-mail: wkorten@cea.fr RID="b" ID="b"Present address: GANIL, Caen, France. RID="c" ID="c"Present address: Radiation and Nuclear Safety Authority, P.O. Box 14, FIN-00881 Helsinki. Communicated by D. Schwalm |
| Keywords: | PACS 23 20 Lv Gamma transitions and level energies – 27 70 +q 150 ⩽ A ⩽ 189 – 21 10 Tg Lifetimes |
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