A cartful quantum statistical analysis of regular and chaotic dynamical beh
aviours in shape-transitional regions within the framework of IBM-2 has bee
n performed, thus providing striking evidence that regular patterns extend
far away from dynamical symmetry limits, mainly in the case of transitions
from deformed (axially symmetric and triaxial) to spherical shapes. (C) 200
0 Elsevier Science B.V. All rights reserved.