The branching ratio of the $J^{\pi }=2^{+}$ 6.92-MeV level of ${\mathrm{O}}^{16}$ via the $J^{\pi }=0^{+}$ 6.05-MeV level is measured to be $R=(2.3\mathrm{}\pm 0.5)\times {10}^{-4\mathrm{}}$. This corresponds to an $E2\mathrm{}$ transition strength of several single-particle units and supports the suggestion that these two states are the lowest members of a rotational band.

• Received 11 March 1966

DOI:https://doi.org/10.1103/PhysRev.148.1045