Beta Decay ofMn56andCo56

$\gamma$-ray transitions following the decay of ${\mathrm{Mn}}^{56}$ to ${\mathrm{Fe}}^{56}$ have been investigated with particular attention given to weak transitions following hindered $\beta$ decays. Two such transitions were found, one to the 2.085-MeV state in ${\mathrm{Fe}}^{56}$ ($logft=8.7\mathrm{}\pm 0.2$) and the other to the 3.445-MeV state ($logft=6.0\mathrm{}\pm 0.2$). Precision $\gamma$-ray measurements have been made both to corroborate the decay scheme and to provide $\gamma$-ray calibration energies. The decay of ${\mathrm{Co}}^{56}$ to ${\mathrm{Fe}}^{56}$ was similarly investigated; several new transitions were found, and precision $\gamma$-ray energies are reported.