SHAPE COEXISTENCE EFFECTS OF SUPER- AND HYPERDEFORMED CONFIGURATIONS IN ROTATING NUCLEI WITH 58-LESS-THAN-OR-EQUAL-TO-Z-LESS-THAN-OR-EQUAL-TO-74

Total energies are calculated for 138 even-even nuclei with proton numbers Z = 58 - 74 and for spins varying between I = 0 (ground states) and the maximum value corresponding to the fission limit induced by rotation. Calculations are based on the Strutinsky method and the cranking approximation. The results are presented in the form of two-dimensional maps of the total nuclear energy as a function of the quadrupole deformations, β2 and γ, and spin. At each spin value and at each (β2, γ) point the energies are minimized with respect to the hexadecapole deformation, β4. The macroscopic energy term in the Strutinsky formula corresponds to the "folded-Yukawa plus exponential" formulation proposed by Møller and Nix. The microscopic energy term was calculated using the universal Woods-Saxon approach. Both terms were tested to ascertain that they reproduce the observed high-spin behavior of nuclei in the mass range considered. © 1992.