Decay of mass-separatedGa78to levels in even-evenGe78

The decay of mass-separated ${}_{}{}^{78}{}_{}{}^{}\mathrm{Ga}$ produced in the thermal neutron fission of ${}_{}{}^{235}{}_{}{}^{}\mathrm{U}$ was studied and a decay scheme was deduced from results of $\gamma$-singles and coincidence measurements. The ${}_{}{}^{78}{}_{}{}^{}\mathrm{Ga}$ half-life was determined to be 5.49±0.25 s and 45 $\gamma$ transitions were placed in a level scheme for ${}_{}{}^{78}{}_{}{}^{}\mathrm{Ge}$ including 19 excited states up to 5078 keV. Observation of a level at 1644 keV with a probable $J^{\pi }$ of $3^{+}$ completes a level structure which is in good agreement up to 2 MeV with a dynamic deformation calculation.