,Theoretical Study on Negative Parity States of 191,193,195,197Au in Particle Triaxial-Rotor Model

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By taking the particle triaxial-rotor model with variable moment of inertia, we investigate the energy spectra,the deformation and the single particle configuration of the negative-parity states in nuclei 191,193,195,197Au systemically. The calculated energy spectra agree well with experimental data. The obtained results indicate that the negative-parity states in 191,193,195,197Au originate from the proton-hole h11/2 configuration coupled to a triaxial oblate Hg core. Meanwhile the main single particle configuration of the bands 1, 2 and 3 are identified to be|5h11/21/2> (α = -1/2),|5h11/2 1/2> (α = 1/2) and |5h9/2 7/2>, respectively.
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