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Skyrme-Hartree-Fock and Hartree-Fock-Bogolyubov Calculations for Nuclei with Tetrahedral Deformation
P. OLBRATOWSKI, J. DOBACZEWSKI,
Hartree-Fock-Bogolyubov solutions corresponding to the tetrahedral
deformation are found in six tetrahedrally doubly-magic nuclei.
Values of the
deformation, depths of the tetrahedral
minima, and their energies relative to the co-existing quadrupole
minima are determined for several versions of the Skyrme force.
Reduction of the tetrahedral deformation energies by pairing
correlations is quantitatively analysed. In light nuclei, shallow
tetrahedral minima are found to be the lowest in energy, while in
heavy nuclei, the minima are deeper but appear at a few MeV of