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Recoil-decay tagging study of 205Fr

U. Jakobsson J. Uusitalo S. Juutinen M. Leino T. Enqvist P. T. Greenlee K. Hauschild 1 P. Jones R. Julin S. Ketelhut P. Kuusiniemi M. Nyman P. Peura P. Rahkila P. Ruotsalainen J. Sarén C. Scholey J. Sorri
1 CSNSM SNO
CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière : UMR8609, CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
Abstract : The nucleus 205Fr has been studied through γ-ray and electron spectroscopy using the recoil-decay tagging technique. The resulting level scheme presents a spherical structure built on the 9/2− ground state and a rotational structure on top of a short-lived isomer. The isomer, with a spin and parity of 13/2+ and a half-life of 80(20) ns, de-excites by an M2 transition directly to the 9/2− ground state. Another, longer-lived, isomer, with a half-life of 1.15(4) ms, has also been found and assigned a spin and parity of 1/2+. Transitions populating and de-exciting this isomer have been observed as well.
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Submitted on : Wednesday, December 5, 2012 - 10:08:45 AM
Last modification on : Wednesday, September 16, 2020 - 5:43:05 PM

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U. Jakobsson, J. Uusitalo, S. Juutinen, M. Leino, T. Enqvist, et al.. Recoil-decay tagging study of 205Fr. Physical Review C, American Physical Society, 2012, 85, pp.014309. ⟨10.1103/PhysRevC.85.014309⟩. ⟨in2p3-00761205⟩

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