The mean lifetime of the 1.472-MeV level ($J^{\pi }={\frac{1}{2}}^{+}$) in ${\mathrm{O}}^{19}$ has been measured using the Doppler-shift attenuation method and found to be ${\tau }_m=1.22\mathrm{}\pm 0.36$ psec. The level decays (1.4 ± 0.2)% to the ground state ($J^{\pi }={\frac{5}{2}}^{+}$) and (98.6 ± 0.2)% to the state at 96 keV ($J^{\pi }={\frac{3}{2}}^{+}$). Energies of the first and second excited states of ${\mathrm{O}}^{19}$ were measured as 96.0 ± 0.5 and 1472 ± 1 keV, respectively. The experimental results are compared with a theoretical calculation.

• Received 4 May 1971

DOI:https://doi.org/10.1103/PhysRevC.4.377