Oblately deformed isomeric proton-emitting state in Lu-151

Abstract : Gamma rays from excited states feeding a proton-emitting isomeric-state in Lu-151 have been observed for the first time. Comparison with state-of-the-art nonadiabatic quasiparticle calculations indicates an oblately deformed, 3/2(+) proton-emitting state with a quadrupole deformation of beta(2) = -0.11. The calculations suggest an increase in quadrupole deformation, to beta(2) = -0.18, with increasing spin which is understood in terms of the mixing of Nilsson states at the Fermi surface. It is also shown that the proton decay half-life is consistent with that from a 3/2(+) state with a quadrupole deformation of beta(2) = -0.12.
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Physical Review C, American Physical Society, 2015, 91 (issue 4), pp.044322. 〈10.1103/PhysRevC.91.044322〉
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Contributeur : Emilie Bonnardel <>
Soumis le : lundi 18 mai 2015 - 10:36:11
Dernière modification le : jeudi 11 janvier 2018 - 06:26:24

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M.J. Taylor, D.M. Cullen, M.G. Procter, A.J. Smith, A. Mcfarlane, et al.. Oblately deformed isomeric proton-emitting state in Lu-151. Physical Review C, American Physical Society, 2015, 91 (issue 4), pp.044322. 〈10.1103/PhysRevC.91.044322〉. 〈in2p3-01152540〉

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