Two-Photon Decay of the 6.05-MeV State ofO16

Abstract

A triple-coincidence, five-parameter technique was employed to search for two-photon emission in the decay of the ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$(6.05-MeV) state. Data were event-recorded and analyzed in parallel with events associated with decay of the ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$(6.13-MeV) and the ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$(7.12-MeV) states. Our measured branching ratio is $\frac{N_{\gamma \gamma }}{N_{\pi }}=(2.5\mathrm{}\pm 1.1)\times {10}^{-4\mathrm{}}$.