Anharmonic double-$\gamma$ vibrations in nuclei and their description in the interacting boson model

Abstract

Double-$\gamma$ vibrations in deformed nuclei are studied in the context of the interacting boson model with special reference to their anharmonic character. It is shown that large anharmonicities can be obtained with interactions that are (at least) of three-body nature between the bosons. As an example the $\gamma$ vibrations of the nucleus ${}_{68}^{166}$Er${}_{98}^{}$ are studied in detail.

10 pages, LaTeX (ReVTeX). 3 ps figures. Accepted in Phys. Rev. C

References in corpus (1)

• Intrinsic structure of two-phonon states in the interacting boson model

Cited by in corpus (5)

• Phase diagram for a Cubic Consistent-Q Interacting Boson Model Hamiltonian: signs of triaxiality
• Triaxial rigidity of ${}^{166}$Er and its Bohr-model realization
• Anharmonic double-phonon excitations in the interacting boson model
• Triaxial rotor modes in finite-N boson systems
• B(E2) anomaly and triaxial deformation in the interacting boson model