Effect of surface plasmon oscillations on Auger electron emission |
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Authors: | G Allié E Blanc D Dufayard P Haymann |
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Institution: | Université Scientifique et Médicale de Grenoble, laboratoire de Spectrométrie Physique, Groupe d''Etude des Surfaces, B.P. 53, 38041 Grenoble, France;Faculté des Sciences de Rouen, Laboratoire de Microscopic Electronique, 76130, Mont St. Aignan, France |
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Abstract: | The integrated areas of the Al L23VV and O KL23L23 Auger peaks and the Al surface plasmon energy ?ωS are reported for the Al(001) surface as a function of exposure to O in the exposure range 0–114 L(1 L=1langmuir=10?6Torr sec). It is shown that for exposures below a critical value of 15 L, ?ωS is constant within experimental error while the O Auger peak area increases linearly. For exposures above 15 L, ?ωS decreases linearly from 10.5 eV to 8.5 eV and the O Auger peak area undergoes relatively slow linear increases correspondingly. The Al Auger peak area decreases by 30% per 1 eV decrease of ?ωS. The results are discussed with reference to theory relating Auger transition intensities to the spectral density function. |
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