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Phys. Rev. C 77, 044314 (2008) [7 pages]

Rotation-aligned coupling in 61Fe

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N. Hoteling1,2, W. B. Walters1, R. V. F. Janssens2, R. Broda3, M. P. Carpenter2, B. Fornal3, A. A. Hecht1,2, M. Hjorth-Jensen4, W. Królas3,5, T. Lauritsen2, T. Pawłat3, D. Seweryniak2, J. R. Stone1,6, X. Wang2,7, A. Wöhr7, J. Wrzesiński3, and S. Zhu2
1Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
2Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
3Niewodniczański Institute of Nuclear Physics, Krakow, PL-31342, Poland
4Department of Physics and Center of Mathematics for Applications, University of Oslo, N-0316 Oslo, Norway
5Joint Institute for Heavy Ion Research, Oak Ridge, Tennessee 37831, USA
6Department of Physics, University of Oxford, OX1 3PU Oxford, United Kingdom
7Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA

Received 19 November 2007; published 29 April 2008

New levels have been established above the 861-keV, 9/2+ isomeric state in 61Fe. The observations can be reproduced satisfactorily by shell model calculations, but only after a significant lowering of the νg9/2 single-particle energy with respect to the value determined empirically from levels outside a 48Ca core. The results are also described well within the scope of the particle-triaxial-rotor model assuming a deformation β2~0.24. The present findings, together with the recently measured magnetic and quadrupole moments of this state, point toward a structure possibly associated with a prolate shape.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.77.044314
DOI:
10.1103/PhysRevC.77.044314
PACS:
21.10.-k, 23.20.Lv, 27.50.+e
 
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