Abstract
The low-lying nuclear structure of the even-even Hf isotopes for n = 106, 108, 110 in the framework of the Interacting Boson Model (IBM-1) is investigated. The energy levels, electromagnetic transition rates B(E2) and electric quadrupole moment are calculated. All calculated values are compared with the available experimental data and show reasonable agreement. A contour plot of the potential energy surfaces shows that three interesting nuclei are deformed and not exactly SU(3).