It is shown that differences, due to charge-dependent effects, in the ${}^{17}$N and ${}^{17}$Ne ground-state wave functions account for the fact that the experimentally measured branch for the ${\beta }^{+}$ decay of ${}^{17}$Ne to the first excited state of ${}^{17}$F is roughly a factor of two larger than expected on the basis of nuclear matrix elements which reproduce the corresponding ${\beta }^{-}$ branch in the decay of ${}^{17}$N.

• Received 15 January 1997

DOI:https://doi.org/10.1103/PhysRevC.55.R1633