MICROSCOPIC CALCULATION OF BETA+/EC DECAY HALF-LIVES WITH ATOMIC NUMBERS Z = 10-30

By the use of the proton-neutron quasiparticle random-phase approximation, with both particle-hole and particle-particle residual interaction terms, we have calculated beta+/EC decay half-lives for isotopic chains with Z = 10-30 up to the proton drip line. The critical role of the particle-particle interaction in beta+ decay is discussed. By comparison of calculated half-lives with experimental data the good accuracy of the theoretical predictions is demonstrated.