EPJ

2023 Impact factor 2.6
EPJ A - Hadrons and Nuclei
Hadrons and Nuclei
Eur. Phys. J. A 7, 49-54

The decay of the neutron-rich nucleus 216Bi

The ISOLDE Collaboration4
J. Kurpeta1,2 - A. Andreyev2 - J. Äystö3 - A.-H. Evensen4 - M. Huhta3 - M. Huyse2 - A. Jokinen3 - M. Karny1 - E. Kugler4 - J. Lettry4 - A. Nieminen3 - A. P\lochocki1 - M. Ramdhane5 - H.L. Ravn4 - K. Rykaczewski1,4,6 - J. Szerypo1,4 - P. Van Duppen2 - G. Walter5 - A. Wöhr2

1 Institute of Experimental Physics, Warsaw University, Hoza 69, 00681 Warsaw, Poland
2 Instituut voor Kern-en Stralingsfysica, University of Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
3 Department of Physics, Accelerator Laboratory, University of Jyväskylä, 40351 Jyväskylä, Finland
4 ISOLDE, CERN-PPE, 1211, Geneva 23, Switzerland
5 Institut de Recherches Subatomiques et Universite Louis Pasteur, 67037 Strasbourg, France
6 ORNL Physics Division, Oak Ridge, TN 37830, USA

Received: 13 July 1999 / Revised version: 22 September 1999 Communicated by D. Schwalm

Abstract
The decay of the neutron-rich isotope 216Bi, produced by proton-induced spallation at the PS Booster-ISOLDE facility, was investigated by $\beta - \gamma\gamma$, $\alpha\gamma$ coincidence and spectrum-multiscaling measurements. A new method for reducing isobaric contamination enabled to cover the unknown region "east" of 208Pb for the isobaric chain A=216. The half-life of the $\beta$ decay of 216Bi was found as T $_{1/2}= 135 \pm 5$ s. Its decay scheme was extended and the possible shell model configurations are proposed.

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

Copyright Società Italiana di Fisica, Springer-Verlag 2000

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