Properties of proton-rich nuclei around doubly magic Ni-48(28)20 are s
tudied in the framework of the self-consistent mean-field theory (Hart
ree-Fock, Hartree-Fock-Bogoliubov, and relativistic mean field). Vario
us effective interactions are employed to investigate two-proton separ
ation energies, deformations, single-particle levels, proton average p
otentials, and diproton partial decay half-lives in this mass region.