\alpha-decay spectroscopy of light odd-odd Bi isotopes - II: 186Bi and the new nuclide 184Bi期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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\alpha-decay spectroscopy of light odd-odd Bi isotopes - II: 186Bi and the new nuclide 184Bi

Authors:	A N Andreyev D Ackermann F P Heßberger S Hofmann M Huyse I Kojouharov B Kindler B Lommel G Münzenberg R D Page K Van de Vel P Van Duppen K Heyde

Institution:	(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, B-3001 Leuven, Belgium;(4) Vakgroep Subatomaire en Stralingsfysica, University of Gent, B-9000 Gent, Belgium;(5) Institut für Physik, Johannes Gutenberg-University, Staudingerweg 7, D-55099 Mainz, Germany

Abstract:	Alpha-decay of the new nuclide ¹⁸⁴Bi has been studied in the complete-fusion reaction ⁹³Nb(⁹⁴Mo, 3n)¹⁸⁴Bi at the velocity filter SHIP. The evaporation residues were separated in-flight and subsequently identified on the basis of recoil- $\alpha$ , recoil- $\alpha$ - $\gamma$ analysis and excitation functions measurements. Two $\alpha$ -decaying isomeric states in ¹⁸⁴Bi with half-life values of 13(2) ms and 6.6(1.5) ms were identified. The $\alpha$ -branching ratio of ¹⁸⁰Tl was deduced for the first time as $b_\alpha = (2 --12)\%$ . Improved data on the fine-structure $\alpha$ -decay of ¹⁸⁶Bi were obtained in the ⁹³Nb(⁹⁵Mo, 2n)¹⁸⁶Bi reaction. A similarity of the decay energies and half-life values of ^184,186Bi is pointed out and a possible explanation for this effect is suggested.Received: 14 March 2003, Revised: 29 April 2003, Published online: 2 September 2003PACS: 23.60.+e $\alpha$ decay - 27.70.+q $150 \leq A \leq 189$ - 27.80.+w $190 \leq A \leq 219$ K. Heyde: Present address: EP-ISOLDE, CERN, CH-1211, Geneva 23, Switzerland.

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