Predicted proton and two-proton decay energies for nuclei in the upper fp shell

The stability of proton-rich nuclei with 2=31-42 is investigated using measured binding energies of the analog neutron-rich nuclei and Coulomb energy shifts deduced from a parametrization of measured Coulomb displacement energies in the same mass region. Predicted binding energies and separation energies for proton and two-proton decay are compared with experimental information and with previous calculations where these are available. The positions of the one-proton and diproton drip lines are determined from the computed decay energies. Additional nuclides predicted to be proton stable but unstable to two-proton emission include several isotopes of Sr, Zr, and Mo. [S0556-2813(99)02802-2].