Signature splitting in ${}^{173}$W with triaxial particle rotor model

Abstract

A particle rotor model with a quasi-neutron coupled with a triaxially deformed rotor is applied to study signature splitting for bands with intruder orbital $\nu 7/2^{+}[633]$ and non-intruder orbital $\nu 5/2^{-}[512]$ in ${}^{173}$W. Excellent agreement with the observed energy spectra has been achieved for both bands. Signature splitting for band $\nu 7/2^{+}[633]$, and band $\nu 5/2^{-}[512]$ before the onset of signature inversion, is satisfactorily reproduced by introducing the $\gamma$ degree of freedom. The phase and amplitude of signature splitting in band $\nu 5/2^{-}[512]$ is attributed to strong competition between $2f_{7/2}$ and $1h_{9/2}$ components. However, the explanation of signature inversion in band $\nu 5/2^{-}[512]$ self-consistently is beyond the present one quasi-neutron coupled with a triaxially deformed rotor.

18 pages, 5 figures

References in corpus (2)

• Chiral bands for quasi-proton and quasi-neutron coupling with a triaxial rotor
• Doublet bands in ${}^{126}$Cs in the triaxial rotor model coupled with two quasiparticles