Theoretical and experimental study of the angular correlations in Auger cascades in noble gas atoms

An overview of recent experimental and theoretical studies of angular correlations in cascades of Auger transitions photoinduced in rare-gas atoms is given. In particular, the resonant Auger transitions from the photoexcited Ne 1s-13p, Ar 2p-14s, Kr 3d-15p, and Xe 4d-16p states to the states of ns-2n' l' and ns-1np-1n' l' configurations with a following Auger (Coster�Kronig) transition have been studied by means of angle-resolved electron spectroscopy including coincidence measurements of two emitted electrons. A theoretical interpretation of experimental results is given in the framework of the MCDF approach. In general the multi-configuration calculations agree very well with experiment