Shape Coexistence in Pb186: Beyond-mean-field description by   configuration mixing of symmetry restored wave functions
  We study shape coexistence in Pb186 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. 
T. Duguet, M. Bender, P. Bonche, P.-H. Heenen