Angle and spin resolved analysis of the resonantly excited Ar* (2p3-l/24s1/2) Auger decay

The Auger spectrum and the relevant angular distribution and spin polarization parameters have been obtained, both, experimentally and numerically for the resonant Auger decay of the photoexcited Ar*(2p(3/2)(-1) 4s(1/2))(J=1) state. The experiment has been performed using linearly and circularly polarized light and by means of a time-of-flight electron analyzer and a Mott polarimeter. The dynamical as well as the transferred spin polarization of the emitted electrons have been determined. The theoretical data have been obtained within a relativistic distorted wave approximation applying a relaxed orbital method. Our numerical results obtained within an 9 configuration state function calculation are compared to the experimental data for the transferred spin polarization. Good agreement to the experiment has been found. Though single fine structure lines show a large dynamic spin polarization the theoretical data yield almost vanishing dynamic spin polarization for the Auger lines. A detailed analysis in terms of partial decay widths and relative phase shifts will be given.