Two-quasiparticle configurations, signature inversion, and the πi13/2⊗ νi13/2 band in 176Ir

R. A. Bark*, A. M. Baxter, A. P. Byrne, P. M. Davidson, G. D. Dracoulis, S. M. Mullins, T. R. McGoram, R. T. Newman

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)


    High-spin states have been populated in 176Ir using the 149Sm(31P,4n) reaction. Gamma-gamma coincidence techniques have allowed numerous bands up to a maximum spin of 32 to be identified. Configurations have been assigned based on spectroscopic properties such as B(M1)/B(E2) values and aligned angular momenta. Signature inversions are observed in bands based on the πh9/2⊗ vi13/2 and πi13/2⊗ vi13/2 configurations. These inversions are compared with particle-rotor model calculations and are qualitatively reproduced when a residual proton-neutron interaction is included. The shape evolution of the bands has been studied using diabatic potential energy surface calculations. A strong configuration dependence is predicted.

    Original languageEnglish
    Article number014320
    Pages (from-to)143201-1432014
    Number of pages1288814
    JournalPhysical Review C - Nuclear Physics
    Issue number1
    Publication statusPublished - 1 Jan 2003


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