The Beta- and Gamma-Rays ofGa72

The beta- and gamma-ray spectra of ${\mathrm{Ga}}^{72}$ (14.1 hours) have been measured in a magnetic lens spectrometer. Measurement of the energies of photoelectrons produced in a thin lead radiator gave lines corresponding to gamma-rays of energies 0.631, 0.835, 1.05, 2.18, and 2.50 Mev, and indications of weaker lines at 1.30, 1.47, 1.57, and 1.81 Mev. An internal conversion line, produced by a gamma-ray of 0.691-Mev energy, was also found.