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γ-Ray spectroscopy at the limits: First observation of rotational bands in Lr255

par Ketelhut, S.;Heenen, Paul-Henri ; [et al.]
Référence Physical review letters, 102, 21, 212501
Publication Publié, 2009-05

Article révisé par les pairs

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Résumé :

The rotational band structure of Lr255 has been investigated using advanced in-beam γ-ray spectroscopic techniques. To date, Lr255 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.