Search for candidate wobbling nuclei in rubidium isotopes

Abstract

The possibility of wobbling mode in the A \(\approx \) 80 mass region is investigated by using the constrained triaxial covariant density functional theory and quantum particle rotor model for rubidium isotopes. Several states with the obvious triaxial deformation and high-j particle configuration are obtained in \(^{79,81,83,85}\)Rb, which are suitable for establishing the wobbling mode. Taking the nucleus \(^{81}\)Rb as an example, the available experimental energy spectrum with the \(\pi \)g\(_{9/2}\) configuration is described well. The decreased energy difference between the partner bands, the enhanced \(B(E2)_{out}\)/\(B(E2)_{in}\) values, the angular momentum components and the azimuthal plots indicate that \(^{81}\)Rb can be transverse wobbling candidate. The present work provides a promising basis for future experimental research on the wobbling mode in the A \(\approx \) 80 mass region.