The beta-gamma angular correlations in the decay of a number of nuclides have been studied as a function of the beta-ray energy. Isotropic correlations were found in the decay of Co⁵⁵, Co⁵⁶, Co⁶⁰, Na²², Na²⁴, Cs¹³⁴, and I¹²⁴. Non-isotropic correlations have been measured in the decay of Rb⁸⁶, Sb¹²⁴, and I¹²⁶. The interpretation of these results in terms of the properties of the emitted radiations and the nuclear energy states is discussed. A non-isotropic conversion electron-gamma-angular correlation was found in the decay of Mo⁹³.
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Stevenson et al. (1951) studied this question.
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