Exchange interaction effects in NO core-level photoionization cross-sections
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abstract
The effect of the exchange interaction in the photoionization continuum is investigated, using N 1s photoionization of NO into the 1s -12 ( 1) and ( 3) final states as an example. The separation in energy of these two final states is 1.41 eV. Significant differences in their partial photoionization cross-sections are observed over a wide range of energies and cannot be accounted for by the different multiplicity of the states. We suggest that the deviation of the 3/ 1 cross-section ratio from the statistical weighting at intermediate energies is dominated by the difference in the final-state potential experienced by the photoelectron and at asymptotically high energies by the multiplet-dependent amount of intensity going into multi-electron (shake-up) processes. Calculations underpinning this point are presented. We also show supporting measurements of the 3/ 1 cross-section ratio for O Is ionization and the absolute photoabsorption cross-section for NO over a wide energy range covering the core level region. IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
published proceedings
NEW JOURNAL OF PHYSICS
author list (cited authors)
Rudel, A., Hergenhahn, U., Maier, K., Rennie, E. E., Kugeler, O., Viefhaus, J., ... Bradshaw, A. M.
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8
complete list of authors
RĂ¼del, A||Hergenhahn, U||Maier, K||Rennie, EE||Kugeler, O||Viefhaus, J||Lin, P||Lucchese, RR||Bradshaw, AM