Oblate deformation in $^{118,119}$Ag

ORAL

Abstract

High spin level schemes of $^{118,119}$Ag are established for the first time by analyzing the high statistics $\gamma$-$\gamma$-$\gamma$ and $\gamma$-$\gamma$-$\gamma$-$\gamma$ coincidence data from the spontaneous fission of $^{252}$Cf at Gammasphere. Two bands with 12 new levels in $^{118}$Ag and two bands with 13 new levels in $^{119}$Ag have been identified. Spins and parities are tentatively assigned according to the systematics. A total Routhian surface calculation and projected shell model calculation have been performed to understand the behavior of these two nuclei. The calculations indicate oblate shape in $^{118,119}$Ag. The dramatic change of signature inversion point in $^{118}$Ag among odd-odd Ag nuclei needs further theoretical consideration.

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Authors

  • E.H. Wang

    • Vanderbilt University

  • J.H. Hamilton

    • Vanderbilt Univ.
    • Vanderbilt University

  • A.V. Ramayya

    • Vanderbilt University

  • J.K. Hwang

    • Vanderbilt University

  • H.J. Li

    • Tsinghua University

  • Y.X. Liu

    • Huzhou University

  • Y.X. Luo

    • Vanderbilt University

  • J.O. Rasmussen

    • LBNL

  • Y. Sun

    • Shanghai Jiao Tong University

  • S.J. Zhu

    • Tsinghua University

  • G.M. Ter-Akopian

    • JINR

  • Yu.Ts. Oganessian

    • JINR