  We consider the possibility of identifying nuclei exhibiting the partial
dynamical SU(3) symmetry (SU(3)-PDS) as those having excitation energy ratio
R(4/2)>3.00 . For this purpose, the level energy spectra of a set of 51 nuclei
in the rare earth and actinide regions which presenting an axially deformed
prolate rotational structure were analyzed via nuclear partial dynamical SU(3)
symmetry in the framework of interacting boson model, to see if the SU(3)-PDS
is broadly applicable, and where, how, and in which nuclei it breaks down.
Overall, the PDS works very well, the predictions of such intermediate symmetry
structure for energy spectrum were compared with the most recent experimental
data and an acceptable degree of agreement is achieved. We conclude that PDS
predictions have a more regular behavior in description of axially deformed
prolate rotational nuclei than DS, which may lead to accurate predictions of
such nuclei, and hence play a significant role in understanding the regular
behavior of complex nuclei.
