J. E. Garcia-Ramos, C. E. Alonso, J. M. Arias, P. Van Isacker
Published 1998-07-31, updated 2000-01-10Version 2
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 $^{166}_{\phantom{0}68}$Er$^{\phantom{00}}_{98}$ are studied in detail.
Comments: 10 pages, LaTeX (ReVTeX). 3 ps figures. Accepted in Phys. Rev. C
Journal: Phys.Rev. C61 (2000) 047305
Description of nuclei in the A$\sim$100 mass region with the interacting boson model
Description of superdeformed nuclei in the interacting boson model
Description of rotating $N=Z$ nuclei in terms of isovector pairing
