ABSOLUTE AUGER RATES, RELATIVE INTENSITIES AND ANGULAR-DISTRIBUTION FOR THE KLL SPECTRA OF AUGER ELECTRONS FROM LASER-EXCITED SODIUM

The absolute Auger rates, relative intensities and the angular anisotr opy coefficients of Auger electrons have been calculated for the KLL A uger spectra of laser-excited sodium atoms. Where in dosed-shell atoms the KLL Auger lines have to be isotropic this is no longer valid for certain Auger transitions in open-shell systems. To study the KLL Auge r spectra of 3s --> 3p excited sodium atoms we calculated the Auger ma trix elements within me multiconfigurational Dirac-Fock model using th e intermediate coupling scheme for representing the atomic states. The intensities and angular distribution parameters are discussed togethe r with theoretical predictions in the LS coupling and compared to resu lts obtained for the sodium ground-state KLL Auger transitions. We als o discuss the influence of overlapping initial fine-structure states o n the Auger dynamics. Large anisotropy coefficients are predicted, eve n for the case of a non-resolved initial- and final-state fine structu re.