From a recent experiment on the analog transition ${}_{}{}^{19}{}_{}{}^{}\mathrm{Ne}\to {}_{}{}^{19}{}_{}{}^{}\mathrm{F}+e^{+}+{\nu }_e$, we extract a stringent limit on the absence of Fierz interference.

RADIOACTIVITY ${}_{}{}^{19}{}_{}{}^{}\mathrm{Ne}$ calculated Fierz interference.

• Received 7 March 1977

DOI:https://doi.org/10.1103/PhysRevC.16.753