Angular distribution and correlation experiments

Introduction. In Part B only total scattering and reaction cross sections were discussed. Much useful information can also be obtained from the study of differential cross sections (angular distributions) and of angular correlations of successive radiations. Two kinds of information result from these studies  

A detailed discussion of angular distribution phenomena is given in the article by Devons in Vol. XLI of this Encyclopedia and in the review articles of Blatt and Biedenharn and Biedenharn and Rose [2S], [29]. No extensive treatment will be given here but the main results will be outlined for use in 

We distinguish between single stage reactions of the type 

In the case of all reactions of the type (25.1) to (25-3) the absorption of particle a may be replaced formally by the emission of a particle or quantum thus the theory for (25-3) also predicts for instance the triple correlation of gamma rays arising from the chain 

Single stage processes usually lead to angular distributions with a strong forward maximum. The most important examples of this class are the stripping and pickup reactions discussed in Sects. 51 to 53- 

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