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Physical Review 84 (2011) 034307
Shape coexistence in 180Hg studied through the β decay of 180Tl
J. Elseviers, A. N. Andreyev1, S. Antalic, A. Barzakh, N. Bree, T. E. Cocolios1, V. F. Comas, J. Diriken, D. Fedorov, V. N. Fedosseyev, S. Franchoo2, J. A. Heredia, M. Huyse1, O. Ivanov, U. K¨oster3, B. A. Marsh, R. D. Page, N. Patronis, M. Seliverstov, I. Tsekhanovich4, P. Van den Bergh, J. Van De Walle, P. Van Duppen1, M. Venhart1, S. Vermote, M. Veselsk'y, C. Wagemans

The β + /EC decay of 180Tl and excited states in the daughter nucleus 180Hg have been investigated at the CERN On-Line Isotope Mass Separator (ISOLDE) facility. Many new low-lying energy levels were observed in 180Hg, of which the most significant are the 0+ 2 at 419.6 keV and the 2+ 2 at 601.3 keV. The former is the bandhead of an excited band in 180Hg assumed originally to be of prolate nature. From the β feeding to the different states in 180Hg, the ground-state spin of 180Tl was deduced to be (4−,5−).
1 :  IKS - Instituut voor Kern-en Stralingsfysica
2 :  IPNO - Institut de Physique Nucléaire d'Orsay
3 :  ILL - Institut Laue-Langevin
4 :  CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
Physique/Physique Nucléaire Expérimentale