Backbending in Dy isotopes within the Projected Shell Model

A systematic study of the yrast band in Dy154-164 isotopes using the Projec ted Shell Model is presented. It is shown that, in the context of the prese nt model, enlarging the mean field deformation by about 20% allows a very g ood description of the spectrum of the yrast band in these isotopes. The de pendence of the B(E2) values on angular momentum is also better described w hen larger deformations are used. The observed oscillation of g-factors at low spin states remains an open question for this model. (C) 1999 Elsevier Science B.V, All rights reserved.