High-spin spectroscopy of I119,121: Prolate and oblate shape coexistence

Y. Liang, D. B. Fossan, J. R. Hughes, D. R. Lafosse, T. Lauritsen, R. Ma, E. S. Paul, P. Vaska, M. P. Waring, N. Xu

Research output: Contribution to journalArticle

73 Scopus citations

Abstract

High-spin states in the odd-proton I119,121 isotopes have been studied following heavy-ion fusion-evaporation reactions using boron and carbon beams. Both prolate (=0°) and oblate (=-60°) collective bands have been observed built on low-lying positive- and negative-parity proton states, namely, h11/2, g9/2, g7/2, and d5/2 orbitals. At the highest spins (39/2) the collective behavior of the h11/2 yrast band is seen to break down when noncollective oblate states become yrast, resulting in the observation of band termination. The terminating state involves the h11/2[g7/2]2[h11/2]2 configuration at =+60°.

Original languageEnglish (US)
Pages (from-to)1041-1057
Number of pages17
JournalPhysical Review C
Volume45
Issue number3
DOIs
StatePublished - Jan 1 1992
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Liang, Y., Fossan, D. B., Hughes, J. R., Lafosse, D. R., Lauritsen, T., Ma, R., Paul, E. S., Vaska, P., Waring, M. P., & Xu, N. (1992). High-spin spectroscopy of I119,121: Prolate and oblate shape coexistence. Physical Review C, 45(3), 1041-1057. https://doi.org/10.1103/PhysRevC.45.1041