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Phys. Rev. Lett. 97, 122501 (2006) [4 pages]

Anomalous Isomeric Decays in 174Lu as a Probe of K Mixing and Interactions in Deformed Nuclei

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G. D. Dracoulis1, F. G. Kondev2, G. J. Lane1, A. P. Byrne1,3, T. R. McGoram1, T. Kibédi1, I. Ahmad4, M. P. Carpenter4, R. V. F. Janssens4, T. Lauritsen4, C. J. Lister4, D. Seweryniak4, P. Chowdhury5, and S. K. Tandel5
1Department of Nuclear Physics, R.S. Phys. S.E., Australian National University, Canberra, A.C.T. 0200 Australia
2Nuclear Engineering Division, Argonne National Laboratory, Argonne Illinois, USA
3Department of Physics, The Faculties, Australian National University, Canberra, A.C.T. 0200 Australia
4Physics Division, Argonne National Laboratory, Argonne Illinois, USA
5Department of Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA

Received 1 May 2006; published 18 September 2006

A Kπ=13+, 280 ns four-quasiparticle isomer in the odd-odd nucleus 174Lu has been identified and characterized. The isomer decays to both Kπ=7+ and Kπ=0+ rotational bands obtained from the parallel and antiparallel coupling of the proton 7/2+[404] and neutron 7/2+[633] orbitals. K mixing caused by particle-rotation coupling explains the anomalously fast transition rates to the 7+ band but those to the 0+ band are caused by a chance degeneracy between the isomer and a collective state, allowing the mixing matrix element for a large K difference to be deduced.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.97.122501
DOI:
10.1103/PhysRevLett.97.122501
PACS:
21.10.Re, 21.10.Tg, 23.20.Lv, 27.70.+q
 
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