Shape coexistence in 186Pb:: beyond-mean-field description by configuration mixing of symmetry restored wave functions

We study shape coexistence in Pb-186 using configuration mixing of angular-momentum and particle-number projected self-consistent mean-field states. The same Skyrme interaction SLy6 is used everywhere in connection with a density-dependent, zero-range pairing force. The model predicts coexisting spherical, prolate and oblate 0(+) states at low energy. (C) 2003 Published by Elsevier Science B.V.