Results of a multidimensional (${\beta }_2$, γ, ${\beta }_4$, ω, Z, and N) search for nuclear superdeformed configurations are presented. Calculations based on a realistic deformed average field give a relatively strong dependence of the ‘‘super’’ elongation on the particle number. This dependence is shown to be a cyclic function of the particle number. It originates from the pseudospin and pseudo-SU(3) symmetries which are obeyed approximately in a realistic average field.

• Received 31 December 1986

DOI:https://doi.org/10.1103/PhysRevLett.59.1405