Transition energies and relative intensities of the Ar L2,3–MM diagram Auger lines: a high-resolution study

Abstract

Abstract The Ar L2,3–MM Auger spectrum induced by impact of 2.0 keV electrons was measured with high resolution (68±4 meV) in the 15–90° angular region. Relative yields, level widths and transition energies have been determined for the diagram Auger lines originating from the 2 P 1/2 and 2 P 3/2 initial vacancy states. The data are compared with those of earlier experimental studies and theoretical calculations, including multiconfiguration Hartree–Fock calculations performed in this work. The isotropy of the studied lines has been confirmed. The measured relative intensities of the fine-structure components of the L23–MM ( 3 P 0,1,2 ) Auger triplets have been found different from those obtained in theoretical calculations and earlier experiments.