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X-Ray Photoelectron Spectroscopy (XPS)-2

X-Ray Photoelectron Spectroscopy (XPS)-2. Louis Scudiero ~scudiero; 5-2669. Electron Spectroscopy for Chemical Analysis (ESCA). h . electron e The 3 step model: excitation of electron to the e surface (diffusion energy loss) Solid Vacuum into the vacuum 2. Diffusion energy loss 3. 1. Escape Excitation total Photoemission intensity for a normal incidence I ( ) . 4. At photon energy of 1254 eV (MgK X-Ray line), = and C = The intensity ratio is IH (90)/ IC (90) = x10-4. (Based of the Scofield's calculations of the cross-sections carried out relativistically using the single potential Hartree-Slater atomic model). Lindau's calculations of the cross-section for isolated atoms (using the one- electron central-field frozen-core model and first order perturbation theory).

emission occurs also when x-rays impinge a sample. Auger electron is initiated by the creation of an ion with an inner shell vacancy. Auger electrons are emitted. in the relaxation of the excited. ion. An electron from a higher. lying energy level fills the inner. shell vacancy with the simultaneous. emission of an Auger electron. It is a ...

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  Spectroscopy, X ray photoelectron spectroscopy, Photoelectron, X ray, Rays

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