Beta decay of 62 Ga

We report a study of the $\ensuremath{\beta}$ decay of ${}^{62}\mathrm{Ga},$ whose dominant branch is a superallowed ${0}^{+}\ensuremath{\rightarrow}{0}^{+}$ transition to the ground state of ${}^{62}\mathrm{Zn}.$ We find the total half-life to be $115.84\ifmmode\pm\else\textpm\fi{}0.25\mathrm{ms}.$ This is the first time that the ${}^{62}\mathrm{Ga}$ half-life has been measured with a purified source. We find that $(0.120\ifmmode\pm\else\textpm\fi{}0.021)%$ of the $\ensuremath{\beta}$ decays are followed by $\ensuremath{\gamma}$ cascades that pass through the ${}^{62}\mathrm{Zn}$ ${2}^{+}$ first excited state at 0.954 MeV. The branching ratio to the first-excited ${0}^{+}$ state in ${}^{62}\mathrm{Zn}$ at 2.33 MeV is $l0.043%.$ We conclude that the branching ratio for the superallowed transition is ${99.85}_{\ensuremath{-}0.15}^{+0.05}%.$