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