Level structure in the transitional nucleus195Au

Excited states in ${}^{195}$Au have been studied experimentally via the ${}^{192}$Os(${}^{7}$Li, 4$n$) reaction at a beam energy of 44 MeV. Based on the $\ensuremath{\gamma}$-$\ensuremath{\gamma}$-$t$ coincidence measurement, a level scheme consisting of 15 new transitions and 10 new levels is established for ${}^{195}$Au. The triaxial shape-polarizing effect of the high-$j$ ${h}_{11/2}$ proton hole was studied by total Routhian surface calculations. By comparing with the level structures in the odd-$A$ Au isotopes and the even-even core Hg nuclei, configurations are proposed to the rotational bands and three-quasiparticle states observed in ${}^{195}$Au.

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