Abstract.
Detailed fine-structure \(\alpha\)-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-\(\alpha\), recoil-\(\alpha\)-\(\gamma\)/X-ray and excitation function measurements. Improved data on the \(\alpha\)-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.
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Communicated by J. Äystö
Received: 14 March 2003, Revised: 1 May 2003, Published online: 2 September 2003
PACS:
23.60.+e \(\alpha\) decay - 27.70.+q \(150 \leq A \leq 189\) - 27.80.+w \(190 \leq A \leq 219\)
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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Andreyev, A.N., Ackermann, D., Antalic, S. et al. \(\alpha\)-decay spectroscopy of light odd-odd Bi isotopes - I: 188,190Bi nuclei. Eur. Phys. J. A 18, 39–54 (2003). https://doi.org/10.1140/epja/i2003-10050-2
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DOI: https://doi.org/10.1140/epja/i2003-10050-2