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- Title
K-Mixing and fast decay of a seven-quasiparticle isomer in<sup>179</sup>Ta.
- Authors
Kondev, F.; Dracoulis, G.; Lane, G.; Ahmad, I.; Byrne, A.; Carpenter, M.; Chowdhury, P.; Freeman, S.; Hammond, N.; Janssens, R.; Kibédi, T.; Lauritsen, T.; Lister, C. J.; Mukherjee, G.; Seweryniak, D.; Tandel, S. K.
- Abstract
A seven-quasiparticle isomer withandT1/2 = 53 ( + 3-7) ns has been identified in179Ta. By comparing its excitation energy with results from multi-quasiparticle calculations that include the effects of blocking and residual nucleon-nucleon interactions, the isomer is assigned the(5/2 +[402], 7/2 +[404],(5/2-[512], 7/2-[514], 7/2-[503], 9/2 +[624]) configuration. The decay of this isomer is found to be unusually fast, a feature that is attributed to a mixing with a specific collective level. The interaction strength is found to be orders of magnitude lower than that observed between interacting collective levels.
- Subjects
RADIOACTIVE decay; ENERGY levels (Quantum mechanics); NUCLEAR excitation; QUASIPARTICLES; PARTICLES (Nuclear physics); NUCLEAR isomers
- Publication
European Physical Journal A -- Hadrons & Nuclei, 2004, Vol 22, Issue 1, p23
- ISSN
1434-6001
- Publication type
Article
- DOI
10.1140/epja/i2004-10025-9