Parity-Forbidden Decay of the 8.88-MeVO16State

The decay rate of the 8.88-MeV state of ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ is estimated with a parity-nonconserving force involving $\rho$ exchange. It is pointed out that this decay can be of crucial importance for testing part of the nonleptonic weak interaction, because isospin conservation in the $\alpha$ decay limits the interaction responsible for the parity mixing in the initial state to the $\Delta I=0\mathrm{}$ part arising from the strangeness-nonchanging nonleptonic weak currents.