Abstract.
A new high-spin isomer in 215Bi, with a half-life of 36.9(6) s, has been identified at the PSB-ISOLDE on-line mass separator using the pulsed-release technique combined with the element selective RILIS source. A decay scheme of \(^{215{\rm m}}\)Bi was constructed and complemented with the low-spinstructure observed in \(^{215{\rm g}}\)Bi decay. The population of a cascade on top of the \(\left( \nu g_{9/2} \right)^5_{9/2+}\) level in 215Poprovides evidence for Gamow-Teller \(\beta\)-decay of the high-spin 215Bi isomer.
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Communicated by C. Signorini
Received: 3 March 2003, Revised: 10 June 2003, Published online: 9 October 2003
PACS:
23.20.Lv \(\gamma\) transitions and level energies - 27.80.+w \(190 \leq A \leq 219\) - 29.30.Kv X- and \(\gamma\)-ray spectroscopy
V. Fedoseyev: Present address: ISOLDE, CERN-PPE, CH-1211, Geneva 23, Switzerland.
M. Górska: Present address: GSI, Darmstadt, D-64220, Germany.
M. Huhta: Present address: Nokia, Tampere, Finland.
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Kurpeta, J., Plochocki, A., Andreyev, A.N. et al. Isomeric and ground-state decay of 215 Bi . Eur. Phys. J. A 18, 31–37 (2003). https://doi.org/10.1140/epja/i2003-10066-6
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DOI: https://doi.org/10.1140/epja/i2003-10066-6