Study of electronic correlations in the Auger cascade decay from Ne∗1s−13p

We present an experimental and theoretical study of the angular correlation between resonant Auger and subsequent Coster–Krönig electrons emitted in the cascade decay of Ne (1s−13p) resonance excited by linearly polarized light. The angular correlation has been measured for different relative orientations between the light polarization, the emission direction of the Coster–Krönig electron and the emission angle of the resonant Auger electron. All the experimental angular patterns are measured as a function of the resonant Auger emission angle and are compared with multi-configuration Dirac–Fock model numerical results, which include electron correlations in each step of the cascade. The agreement between theory and experiment is different for the different considered decay channels; for the cases in which disagreement is larger it is argued that an extended configuration space must be taken into account to reproduce the experimental data. (Some figures in this article are in colour only in the electronic version) 1