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- Title
NEW STRUCTURES IN <sup>178</sup>HF AND COULOMB EXCITATION OF ISOMERS.
- Authors
HAYES, A.B.; CLINE, D.; WU, C. Y.; HURST, A.M.; CARPENTER, M.P.; GREENE, J.P.; JANSSENS, R.V.F.; LAURITSEN, T.; SEWERYNIAK, D.; ZHU, S.; KARAMIAN, S.A.; WALKER, P.M.; SWAN, T.P.D.; RIGBY, S.V.; CULLEN, D.M.; LUMLEY, N.M.; MASON, P.; CARROLL, J.J.; DETWILER, B.; HARLE, T.
- Abstract
A 985 MeV 178Hf beam was Coulomb excited by a 208Pb target at the ATLAS accelerator of Argonne National Laboratory. Gammasphere and the CHICO particle detector recorded particle-γ coincidence data. The aim was to populate and determine the mechanism of previously observed Coulomb excitation of the Kπ = 6+ (t1/2 = 77 ns), 8- (4 s) and 16+ (31 y) isomer bands. New rotational bands were identified including an aligned band which appears to mix with the ground-state band (GSB) and the γ-vibrational band above ~ 12 ħ of angular momentum. Newly observed γ-decay transitions into the three isomer bands may elucidate the K-mixing which allows Coulomb excitation of these isomer bands, but direct decays from the GSB into the 16+ isomer band have not yet been confirmed.
- Subjects
NUCLEAR structure; HAFNIUM isotopes; COULOMB excitation; NUCLEAR isomers; NUCLEAR counters; PARTICLE accelerators; ENERGY levels (Quantum mechanics); ANGULAR momentum (Nuclear physics)
- Publication
International Journal of Modern Physics E: Nuclear Physics, 2011, Vol 20, Issue 2, p474
- ISSN
0218-3013
- Publication type
Article
- DOI
10.1142/S0218301311017879