Disintegration ofGa70

The radiations of ${\mathrm{Ga}}^{70}$ (21.1 min) have been investigated with beta- and gamma-scintillation spectrometers. The principal mode of decay is a ground-state beta transition of energy 1.65±0.01 Mev. Study of the gamma spectrum has revealed two gamma rays with energies and intensities (relative to the total number of disintegrations) of 1.036±0.010 Mev (0.76%) and 0.174±0.005 Mev (0.44%). These two gamma rays are in coincidence. From the above facts and the results of beta-gamma coincidence studies, it is concluded that there are two weak beta groups with energies and intensities of 0.61±0.02 Mev (0.3%) and 0.44±0.02 Mev (0.5%) leading from ${\mathrm{Ga}}^{70}$ to levels in ${\mathrm{Ge}}^{70}$ at 1.036 and 1.21 Mev, respectively. The angular correlation of the two gamma rays has been measured, and the observed correlation function is in agreement with that expected for the spin sequence 0-2-0. A search for evidence of the 1.21-Mev electric-monopole crossover transition yielded negative results.