The angular distributions for the components of a line in a β-transition are exhibited for use in obtaining numerical values for the angular correlation between successive nuclear beta- and gamma-radiations. The calculations are made with each of the five linearly independent electron-neutrino interactions (assuming $Z=0$ for allowed, first and second forbidden β-transitions. In general, the theory yields an angular correlation for forbidden β-transitions which will vary with the interaction and the degree of forbiddenness, and thus affords a means of disintinguishing between these. It is shown that no angular correlation is to be expected whenever, (a) the β-transition is allowed, (b) the transition is classified as forbidden but has an allowed energy spectrum, (c) only the low energy β-particles are counted.
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Falkoff et al. (1950) studied this question.
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