A Rüdel et al 2005 New J. Phys. 7 189 doi:10.1088/1367-2630/7/1/189
A Rüdel1, U Hergenhahn2,4, K Maier1, E E Rennie1,5, O Kugeler1,6, J Viefhaus1, P Lin3, R R Lucchese3 and A M Bradshaw2
Show affiliationsThe effect of the exchange interaction in the photoionization continuum is investigated, using N 1s photoionization of NO into the 1s−12π (1Π) and (3Π) 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 3Π/1Π 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 3Π/1Π cross-section ratio for O 1s ionization and the absolute photoabsorption cross-section for NO over a wide energy range covering the core level region.
33.80.Eh Autoionization, photoionization, and photodetachment
Issue 1 (September 2005)
Received 8 June 2005
Published 6 September 2005
A Rüdel et al 2005 New J. Phys. 7 189
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