Angle and spin resolved analysis of the resonantly excited Ar~*(2p_(3/2)~(-1)4s_(1/2))_(J=1) Auger decay

摘要

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 8 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.