Oxygen-13, a beta-delayed proton emitter, was produced by the reaction ${\mathrm{N}}^{14}(p, 2n){\mathrm{O}}^{13}$ with 50-MeV protons. Two delayed-proton groups were observed originating from levels in ${\mathrm{N}}^{13}$ at 8.90 and 9.48 MeV. The half-life of ${\mathrm{O}}^{13}$ was determined to be 8.7±0.4 msec. The beta-decay energy was estimated to be 17.5±0.2 MeV on the basis of this half-life and the known $log\mathrm{ft}$ values for the mirror nucleus.

• Received 3 August 1965

DOI:https://doi.org/10.1103/PhysRev.140.B1513