Registration of Low-Intensity Alpha–Gamma Transitions in the Chain of 226Ra Decay

The results are presented from an experiment to measure the probabilities of γ-quanta emission from the first excited states of daughter nuclei formed in α-decay chain of the 226Ra nucleus. The use of fast temporal digitizers of the shape of the signal from a semiconductor α-detector and a germanium γ-detector of large volume allows the probabilities of the decay of the first excited states to be estimated at the level of 10–5 from the main mode of decay.