A spectrometric investigation of the radiations of ${\mathrm{Ce}}^{143}$ has revealed that there are beta-ray groups of 1.090±0.005, 1.390±0.005, and 0.710±0.010 Mev maximum energy. In addition, there was evidence for a fourth lower energy group which could not be resolved. Electromagnetic radiations of energies 0.0349±0.001, 0.126±0.005, ∼0.160±0.010, 0.289±0.005, 0.356±0.005, 0.660±0.010, and 0.720±0.010 Mev were found. A decay scheme for ${\mathrm{Ce}}^{143}$ is proposed.

• Received 31 July 1952

DOI:https://doi.org/10.1103/PhysRev.88.1129