The branching ratio $\frac{[{}_{}{}^{19}{}_{}{}^{}\mathrm{Ne}\to {}_{}{}^{19}{}_{}{}^{}\mathrm{F}_{}^{*}{}_{}{}^{}(1554\mathrm{} \mathrm{keV})+e^{+}+\nu ]}{[{}_{}{}^{19}{}_{}{}^{}\mathrm{Ne}\to {}_{}{}^{19}{}_{}{}^{}\mathrm{F}+e^{+}+\nu ]}$ as inferred from observing a subsequent $\gamma$ transition in ${}_{}{}^{19}{}_{}{}^{}\mathrm{F}$ is found to be (8.2±2.0) × ${10}^{-6\mathrm{}}$. Uncertainties about possible ${}_{}{}^{19}{}_{}{}^{}\mathrm{O}$ contamination lead to the conservative interpretation of this result as an upper limit for the branching ratio. The implications for a recently suggested study of inelastic neutrino scattering from ${}_{}{}^{19}{}_{}{}^{}\mathrm{F}$ are discussed.

RADIOACTIVITY ${}_{}{}^{19}{}_{}{}^{}\mathrm{Ne}$; measured $\beta$ decay branching ratio to 1554 keV level.

• Received 3 December 1974

DOI:https://doi.org/10.1103/PhysRevC.12.315