Extended mean field description of deformed states in neutron deficient Cd- and Sn-nuclei

Extensions to the standard total routhian surface calculations are presented. The particle number symmetry is approximately restored using the Lipkin-Nogami method to avoid the well known problems of sharp pairing phase transitions, that are predicted by mean-field calculations in the vicinity of closed shells or in the high-spin regime. Secondly, the quadrupole pairing interaction is added to the standard seniority pairing to account for an improved treatment of particle-particle correlations. The method is applied to the analysis of collective rotational bands found in neutron deficient Cd, In, Sn, Sb and Te isotopes.