Electron angular distribution in double Auger decay

Angular distribution of electrons emitted in double Auger-decay is studied within the frames of many-particle perturbation theory. Expression for angular correlation function of emitted electrons is obtained for the first time. Direct calculations were carried out in neon atom. Contribution of the shaking mechanism to the process under consideration is discussed. It is shown a feature, more sensitive to selection of applied approximation as compared to complete probability of the double auger-decay