Interference Effects in the Auger Decay of the Resonantly Excited2p3/213dState of Argon

Abstract
High resolution resonant Auger spectra have been measured at the VUV beam line at ELETTRA, Sincrotrone Trieste, while tuning the photon energy across the 2p3/213d resonance of argon. A large variation of the branching ratio for decay into the spectator 3p23d and shakeup 3p24d channels is observed. The effect has not been seen previously in resonant inner-shell excitation and is attributed to the interference between the direct photoionization process and resonant Auger decay leading to the same final state.

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