Intruder bands in (Z=53) I113: Band termination interpretation

M. P. Waring*, E. S. Paul, C. W. Beausang, R. M. Clark, R. A. Cunningham, T. Davinson, S. A. Forbes, D. B. Fossan, S. J. Gale, A. Gizon, J. Gizon, K. Hauschild, I. M. Hibbert, A. N. James, P. M. Jones, M. J. Joyce, D. R. Lafosse, R. D. Page, I. Ragnarsson, H. SchnareP. J. Sellin, J. Simpson, P. Vaska, R. Wadsworth, P. J. Woods

*Corresponding author for this work

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High spin states in I113 were studied with the Ni58(58Ni, 3pγ) reaction at 240 MeV, using the eurogam array in Daresbury, United Kingdom, with 45 Ge detectors. A total of five deformed intruder bands extending to spins I ranging from (73/2-89/2)Latin small letter h with stroke have been identified, all of which reach frequencies Latin small letter h with strokeω>1.0 MeV and excitation energies ∼25 MeV. A gradual dropoff of the dynamic moment of inertia scrI(2) with increasing rotational frequency has been observed and attributed to a mode of ''soft'' band termination involving valence particle alignment. In this process, the nucleus progresses gradually, over many transitions, towards a noncollective oblate (γ=+60°) band terminating state.

Original languageEnglish
Pages (from-to)2427-2438
Number of pages12
JournalPhysical Review C
Issue number5
Publication statusPublished - 1 Jan 1995

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