alpha-decay spectroscopy of light odd-odd Bi isotopes - I: 188,190Bi nuclei |
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| Authors: | A. N. Andreyev D. Ackermann S. Antalic H. J. Boardman P. Cagarda J. Gerl F. P. Heßberger S. Hofmann M. Huyse D. Karlgren A. Keenan H. Kettunen A. Kleinböhl B. Kindler I. Kojouharov A. Lavrentiev C. D. O’Leary M. Leino B. Lommel M. Matos C. J. Moore G. Münzenberg R. D. Page S. Reshitko S. Saro H. Schaffner C. Schlegel M. J. Taylor K. Van de Vel P. Van Duppen L. Weissman K. Heyde |
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| Affiliation: | (1) Department of Physics, Oliver Lodge Laboratory, University of Liverpool, L69 7ZE Liverpool, UK;(2) Gesellschaft fur Schwerionenforschung, Planckstrasse 1, D-64291 Darmstadt, Germany;(3) Instituut voor Kern- en Stralingsfysica, University of Leuven, Celestijnenlaan 200 D, Leuven Belgium;(4) Department of Physics, University of Jyväskylä, FIN-40351 Jyväskylä, Finland;(5) Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, 141980 Dubna, Russia;(6) Department of Nuclear Physics, Comenius University, SK-84248 Bratislava, Slovakia;(7) Department of Physics, Royal Institute of Technology, 104 05 Stockholm, Sweden;(8) Vakgroep Subatomaire en Stralingsfysica, University of Gent, B-9000 Gent, Belgium;(9) Institut für Physik, Johannes Gutenberg-University, Staudingerweg 7, D-55099 Mainz, Germany |
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| Abstract: | Detailed fine-structure  -decay studies of 188,190Bi were performed using the complete-fusion reactions of 50,52Cr ions with a 142Nd target at the velocity filter SHIP. The evaporation residues were separated in-flight and subsequently identified on the basis of recoil- , recoil- - /X-ray and excitation function measurements. Improved data on the  -decay of 188,190Bi were obtained and a number of new low-lying excited states in the daughters 184,186Tl were observed. An intruder, presumably 10- state was identified in 184Tl, extending the systematics of such states in the odd-odd Tl nuclei beyond the neutron mid-shell at N = 104. Some technical aspects of experiment at recoil separators are also discussed.Received: 14 March 2003, Revised: 1 May 2003, Published online: 2 September 2003PACS: 23.60.+e  decay - 27.70.+q  - 27.80.+w  C.D. O Leary: Present address: Department of Physics, University of York, York, UK.M.J. Taylor: Present address: Department of Physics and Astronomy, Rutgers Univesity, NJ, USA.L. Weissman: Present address: NSCL, Michigan State University, East Lansing, MI 48824-1321 USA.K. Heyde: Present address: EP-ISOLDE, CERN, CH-1211, Geneva 23, Switzerland. |
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