Phys. Rev. Lett. 102, 212501 (2009) [4 pages]γ-Ray Spectroscopy at the Limits: First Observation of Rotational Bands in 255LrReceived 14 November 2008; published 29 May 2009 The rotational band structure of 255Lr has been investigated using advanced in-beam γ-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 α 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. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.212501
DOI:
10.1103/PhysRevLett.102.212501
PACS:
21.10.Re, 23.20.Lv, 27.90.+b
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