UNIFIED DESCRIPTION OF THE LOW-LYING STATES OF THE GROUND BANDS OF EVEN-EVEN NUCLEI

A unified description of the low lying excited states of the ground ba nds of even-even nuclei throughout the Periodic Table is obtained. A n ew variable in the geometrical part of the interaction characterizing the different types of collective modes is evaluated and analyzed. A p henomenological formula for the dynamical coefficient of the interacti on, depending on the nuclear shell quantum numbers, is derived. A good agreement between the so-obtained theoretical ground band energies an d the experimental ones is obtained for 927 low lying states of 271 nu clei from five major shells.