Abstract

The argon 2p photoelectron spectrum has been measured using Al K alpha radiation. A complex satellite spectrum within 35 eV of the main photoelectron lines is reported with an intensity of 9.6% relative to the main 2p lines. The spectrum has been interpreted with the aid of a theoretical study using correlated final-ion-state wavefunctions calculated with a configuration interaction technique. The major contributions to the satellite spectrum come from 'shake-up'-type processes which have their origin in relaxation effects and involve 3p to np excitations.

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