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

Abstract : 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.
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http://hal.in2p3.fr/in2p3-00399512
Contributor : Ludovic Le Noan <>
Submitted on : Monday, June 29, 2009 - 10:36:58 AM
Last modification on : Thursday, November 19, 2020 - 10:52:02 AM

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S. Ketelhut, P.T. Greenlees, D. Ackermann, S. Antalic, E. Clement, et al.. Gamma-Ray Spectroscopy at the Limits: First Observation of Rotational Bands in 255Lr. Physical Review Letters, American Physical Society, 2009, 102, pp.212501. ⟨10.1103/PhysRevLett.102.212501⟩. ⟨in2p3-00399512⟩

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