Backbending and $Gamma$-Vibrations

Abstract

We propose that the backbending phenomenon can be explained as a result of the disappearance of collective $gamma$-vibrational mode in the rotating frame. Using a cranking+random phase approximation approach for the modified Nilsson potential + monopole pairing forces, we show that this mechanism is responsible for the backbending in ${}^{156}$Dy, ${}^{158}$Er and obtain a good agreement between theoretical and experimental results.

5 pages, 4 figures, published version

References in corpus (4)

• Microscopic Structure of High-Spin Vibrational Excitations in Superdeformed 190,192,194Hg
• Symmetry breaking and the random-phase approximation in small quantum dots
• Dynamical moment of inertia and quadrupole vibrations in rotating nuclei
• Self-Consistent Harmonic Oscillator Model and Tilted Rotation

Cited by in corpus (7)

• Parametrizations of triaxial deformation and E2 transitions of the wobbling band
• Quasiparticle and $\gamma$-band structures in ${}^{156}$Dy
• Microscopic analysis of shape-phase transitions in even-even N~90 rotating nuclei
• Suppression of modes in the random phase approximation
• Reflection symmetry instability at high spins in 162,164Yb
• Instabilities, nonhermiticity and exceptional points in the cranking model
• Wobbling excitations at high spins in A~160