Gamma-Ray Spectroscopy at the Limits: First Observation of Rotational Bands in 255Lr

S. Ketelhut; P.T. Greenlees; D. Ackermann; S. Antalic; E. Clement; I.G. Darby; O. Dorvaux; A. Drouart; S. Eeckhaudt; B.J.P. Gall; A. Gorgen; T. Grahn; C. Gray-Jones; K. Hauschild; R.D. Herzberg; F.P. Hessberger; U. Jakobsson; G.D. Jones; P. Jones; R. Julin; S. Juutinen; T.L. Khoo; W. Korten; M. Leino; A.P. Leppaanen; J. Ljungvall; S. Moon; M. Nyman; A. Obertelli; J. Pakarinen; E. Parr; P. Papadakis; P. Peura; J. Piot; A. Pritchard; P. Rahkila; D. Rostron; P. Ruotsalainen; M. Sandzelius; J. Saren; C. Scholey; J. Sorri; A. Steer; B. Sulignano; C. Theisen; J. Uusitalo; M. Venhart; M. Zielinska; M. Bender; P.H. Heenen

HAL : in2p3-00399512, version 1

DOI : 10.1103/PhysRevLett.102.212501

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Physical Review Letters 102 (2009) 212501

Gamma-Ray Spectroscopy at the Limits: First Observation of Rotational Bands in 255Lr

S. Ketelhut, P.T. Greenlees, D. Ackermann, S. Antalic, E. Clement¹, I.G. Darby, O. Dorvaux², A. Drouart¹, S. Eeckhaudt, B.J.P. Gall², A. Gorgen¹, T. Grahn, C. Gray-Jones, K. Hauschild³, R.D. Herzberg, F.P. Hessberger, U. Jakobsson, G.D. Jones, P. Jones, R. Julin, S. Juutinen, T.L. Khoo, W. Korten¹, M. Leino, A.P. Leppaanen, J. Ljungvall¹, S. Moon, M. Nyman, A. Obertelli¹, J. Pakarinen, E. Parr, P. Papadakis, P. Peura, J. Piot², A. Pritchard, P. Rahkila, D. Rostron, P. Ruotsalainen, M. Sandzelius, J. Saren, C. Scholey, J. Sorri, A. Steer, B. Sulignano¹, C. Theisen¹, J. Uusitalo, M. Venhart, M. Zielinska, M. Bender⁴, P.H. Heenen

(29/05/2009)

The rotational band structure of 255Lr has been investigated using advanced in-beam gamma-ray spectroscopic techniques. To date, 255Lr is the heaviest nucleus to be studied in this manner. One rotational band has been unambiguously observed and strong evidence for a second rotational structure was found. The structures are tentatively assigned to be based on the 1/2;{-}[521] and 7/2;{-}[514] Nilsson states, consistent with assignments from recently obtained alpha decay data. The experimental rotational band dynamic moment of inertia is used to test self-consistent mean-field calculations using the Skyrme SLy4 interaction and a density-dependent pairing force.

1 :	IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)

2 :	IPHC - Institut Pluridisciplinaire Hubert Curien

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

4 :	CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan

Thème(s)

Physique/Physique Nucléaire Théorique


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Déposé pour le compte de : Mickael Bender <>
Soumis le : Lundi 29 Juin 2009, 10:36:58
Dernière modification le : Lundi 6 Juillet 2009, 15:08:18