Observation of the Auger Resonant Raman Effect

Monochromatized synchrotron radiation near the photoionization threshold was used to produce the 2p3/2(-1) vacancy state in atomic Xe. Deexcitation of the state through L3-M4M5(1G4) Auger-electron emission was measured. The 5d spectator-electron Auger satellite was observed. The satellite energy exhibits linear dispersion as a function of the photon energy of the exciting radiation. The observed width of the 1G diagram line decreases by approximately 40% at threshold. This radiationless process can thus be construed as the Auger analog of the X-ray resonant Raman effect.