High-spin states in Ce136: Systematics of collective oblate rotation

E. S. Paul, D. B. Fossan, Y. Liang, R. Ma, N. Xu, R. Wadsworth, I. Jenkins, P. J. Nolan

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41 Scopus citations


The level structure of the transitional even-even Ce136 nucleus has been investigated using the Sn122(18O, 4n) reaction. The prominent structure observed at high spin is a I=1 rotational band, populated with 25% intensity of the 2+0+ transition, which has a low dynamic moment of inertia <20Latin small letter h with stroke2 MeV-1 for frequencies below Latin small letter h with stroke=0.45 MeV. This band is interpreted in terms of a two-quasiproton-two-quasineutron configuration with a shape close to the collectively rotating =-60° oblate shape, and is related to the oblate h11/2[h11/2]2 configuration seen in several nearby odd-Z nuclei. The systematics of such oblate rotational bands in this mass region are discussed. Other I=2 bands, built on states including h11/2 quasineutron orbitals, are also associated with collective oblate rotation. In addition, tentative evidence is presented for a weak band (<2% intensity), showing an enhanced dynamic moment of inertia 57Latin small letter h with stroke2 MeV-1, built on the highly deformed [i13/2]2 prolate configuration.

Original languageEnglish (US)
Pages (from-to)1576-1583
Number of pages8
JournalPhysical Review C
Issue number4
StatePublished - Jan 1 1990
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Paul, E. S., Fossan, D. B., Liang, Y., Ma, R., Xu, N., Wadsworth, R., Jenkins, I., & Nolan, P. J. (1990). High-spin states in Ce136: Systematics of collective oblate rotation. Physical Review C, 41(4), 1576-1583. https://doi.org/10.1103/PhysRevC.41.1576