Smooth band termination in odd mass La nuclei: [Formula Presented]

R. Wadsworth, E. S. Paul, A. Astier, D. Bazzacco, A. J. Boston, N. Buforn, C. J. Chiara, D. B. Fossan, C. Fox, J. Gizon, D. G. Jenkins, N. S. Kelsall, T. Koike, D. R. LaFosse, S. Lunardi, P. J. Nolan, B. M. Nyakó, C. M. Petrache, H. Scraggs, K. StarostaJ. Timár, A. Walker, A. N. Wilson, L. Zolnai, B. G. Dong, I. Ragnarsson

Research output: Contribution to journalArticlepeer-review


High spin states in [Formula Presented] have been investigated using the [Formula Presented] and [Formula Presented] reactions, respectively. γ rays were detected using the EUROBALL IV [Formula Presented] and EUROGAM II [Formula Presented] arrays. The results have enabled the negative parity yrast band, built on the [Formula Presented] orbital at low spin, and the lowest lying [Formula Presented] bands to be extended to higher spins. The positive parity, [Formula Presented] bands in [Formula Presented] and the positive parity, [Formula Presented] band in [Formula Presented] can be interpreted, with the aid of cranked Nilsson-Strutinsky calculations, as examples of smoothly terminating bands in valence space based on both signatures of the [Formula Presented] configuration, where [Formula Presented] for [Formula Presented] respectively. The favored [Formula Presented] bands of these configurations are predicted to terminate at [Formula Presented] and [Formula Presented] respectively, and experimentally the bands are observed to within two transitions of these terminating states. The data for the positive parity, [Formula Presented] band in [Formula Presented] do not allow any firm conclusions to be made regarding the high spin structure of this band. The positive parity bands in [Formula Presented] have a different structure at high spin compared with the lighter nuclei. In this case the bands may be interpreted in terms of a [Formula Presented] configuration relative to a [Formula Presented] core.

Original languageEnglish
Pages (from-to)7
Number of pages1
JournalPhysical Review C - Nuclear Physics
Issue number3
Publication statusPublished - 2000


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