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Anomalous isomeric decays in 174Lu as a probe of K mixing and interactions in deformed nuclei

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PHYSICAL REVIEW LETTERS
卷 97, 期 12, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.97.122501

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A K-pi=13(+), 280 ns four-quasiparticle isomer in the odd-odd nucleus Lu-174 has been identified and characterized. The isomer decays to both K-pi=7(+) and K-pi=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.

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