Abstract
The beta decay rate is remeasured. The present result, , agrees with recent realistic calculations of this rate only when pion exchange currents are included in the axial-vector time component. The impulse approximation underestimates this rate by more than a factor of 3. This result may be combined with the muon capture rate for the inverse reaction to obtain .
- Received 28 January 1982
DOI:https://doi.org/10.1103/PhysRevLett.48.914
©1982 American Physical Society