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Phys. Rev. C 80, 034324 (2009) [4 pages]

High-K multi-quasiparticle states and rotational bands in 103255Lr

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H. B. Jeppesen1, R. M. Clark1, K. E. Gregorich1, A. V. Afanasjev2, M. N. Ali1,3, J. M. Allmond4, C. W. Beausang4, M. Cromaz1, M. A. Deleplanque1, I. Dragojević1,3, J. Dvorak1, P. A. Ellison1,3, P. Fallon1, M. A. Garcia1,3, J. M. Gates1,3, S. Gros1, I. Y. Lee1, A. O. Macchiavelli1, S. L. Nelson1,3, H. Nitsche1,3, L. Stavsetra1, F. S. Stephens1, and M. Wiedeking1
1Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
2Department of Physics and Astronomy, Mississippi State University, Mississippi 39762, USA
3Department of Chemistry, University of California, Berkeley, California 94720, USA
4Department of Physics, University of Richmond, Richmond, Virginia 23173, USA

Received 11 November 2008; published 29 September 2009

Two isomeric states have been identified in 255Lr. The decay of the isomers populates rotational structures. Comparison with macroscopic-microscopic calculations suggests that the lowest observed sequence is built upon the [624]9/2+ Nilsson state. However, microscopic cranked relativistic Hartree-Bogoliubov (CRHB) calculations do not reproduce the moment of inertia within typical accuracy. This is a clear challenge to theories describing the heaviest elements.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.80.034324
DOI:
10.1103/PhysRevC.80.034324
PACS:
23.20.Lv, 21.10.Re, 27.90.+b, 29.30.Kv
 
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