B Schmidtke

The Kr M4,5N1N2,3 1P1 Auger decay: measurement of the transferred spin polarization and analysis of Auger amplitudes

The angular distribution of the transferred spin polarization of Kr M4,5N1N2,3 1P1 Auger electrons after primary ionization with circularly polarized light has been measured and the intrinsic parameters δ1 and ξ1 have been determined from experimental results. The explicit equation interconnecting the intrinsic parameters for Auger decay from a (d5/2)-1 core hole has been derived and is used for a detailed analysis of the transitions in terms of Auger amplitude ratios and phase shift differences. The results indicate that the final ionic state is well described by a 1P symmetry. Additional constraints imposed on the intrinsic parameters for singlet states prevent unambiguous determination of Auger amplitudes from experiment even in the limiting case of pure LS coupling.

Testing the feasibility of a complete Auger decay experiment by spin- and angle-resolved electron spectroscopy on Xe N4O2,3O2,3 3P1

The intrinsic parameters β1 and γ1 were determined separately for the first time by explicit measurement of the angular distribution of the transferred spin polarization of Xe N4O2,3O2,3 3P1 Auger electrons after primary excitation with circularly polarized light from the BESSY-II helical undulator UE56/1. The feasibility of a complete experiment for the Auger decay, i.e. extraction of Coulomb matrix elements from the experimental data, is discussed and reveals a new fundamental equation connecting the intrinsic parameters of Auger decay. An analysis procedure is performed, yielding a well confined solution space for amplitude ratios and phase shift differences.