Recoil-decay tagging study of 205Fr

U. Jakobsson; J. Uusitalo; S. Juutinen; M. Leino; T. Enqvist; P. T. Greenlee; K. Hauschild; P. Jones; R. Julin; S. Ketelhut; P. Kuusiniemi; M. Nyman; P. Peura; P. Rahkila; P. Ruotsalainen; J. Sarén; C. Scholey; J. Sorri

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DOI : 10.1103/PhysRevC.85.014309

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Physical Review C 85 (2012) 014309

Recoil-decay tagging study of 205Fr

U. Jakobsson, J. Uusitalo, S. Juutinen, M. Leino, T. Enqvist, P. T. Greenlee, K. Hauschild¹, P. Jones, R. Julin, S. Ketelhut, P. Kuusiniemi, M. Nyman, P. Peura, P. Rahkila, P. Ruotsalainen, J. Sarén, C. Scholey, J. Sorri

(2012)

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.

1 :	CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse

équipe(s) de recherche : CSNSM SNO

Thème(s)

Physique/Physique Nucléaire Expérimentale


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