Angular correlations of inelastic scattered α particles and γ quanta for exchange processes in the presence of distortions in the eikonal approximation

Formulae are obtained for the angular correlation function of inelastically scattered α particles and γ quanta of a pure EL multipolarity, which are emitted by an excited nucleus, in the case of exchange processes, if distortions are introduced into the eikonal approximation. The matrix element of the exchange processes is considered as a coherent sum of contributions from two mechanisms: replacement and stripping of a heavy particle. Concrete calculations are performed for the reaction 12C(α, α'γ)12C. The obtained results show that the developed formalism enables one to get an agreement between the theoretical angular correlation functions with the experimental data at reasonable values of the calculation parameters