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|Type:||Artigo de periódico|
|Title:||Shake-up Satellites In High Energy Auger Spectra Of The 4d Metals|
De Castro S.G.C.
|Abstract:||Interpretation of the satellites of the Cu L2,3M4,5M4,5 has involved considerable controversy in recent years. Reaching unambiguous conclusions is impeded by the contribution of Coster-Kronig (CK) transitions, requiring considerable experimental investigation before clarifying the relative roles of shake-up and CK processes. The L2,3M4,5M4,5 spectra of Ag, Pd and Rh excited by bremsstrahlung also have satellite features and manifest the following experimental systematics: both the L3 and L2 losses are displaced the same amount relative to their respective main peaks and their shapes are approximately the same; there seems to be little CK contribution; and comparison with alloy spectra indicate the intrinsic nature of the losses, consistent with energy loss measurements. We demonstrate that the satellite relative positions and lineshapes are consistent with the spectator vacancy interpretation, so that they appear to correspond basically to broadened, displaced "images" of the corresponding main spectra. It seems that the satellites are almost entirely caused by intra-atomic shake-up processes; the "image" nature of their lineshapes resembles that of extrinsic losses in other metals.|
|Citation:||Surface Science. , v. 357-358, n. , p. 251 - 254, 1996.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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