Measurement of the $2^{+}\to 0^{+}$ ground-state transition in the $\beta$ decay of ${}^{20}$F

O. S. Kirsebom, M. Hukkanen, A. Kankainen +36

We report the first detection of the second-forbidden, non-unique, $2^{+}\to 0^{+}$, ground-state transition in the $\beta$ decay of ${}^{20}$F. A low-energy, mass-separated $^{20}\r…