Soft x-ray appearance potential spectroscopy

Soft X-ray appearance potential spectroscopy. Another name for APXPS. 

Soft X-ray appearance potential spectroscopy (SXAPS) studies of radiant coil alloys were carried out to determine surface compositions resulting from exposure to a range of environments. 

Soft X-Ray Appearance Potential Spectroscopy. In SXAPS the X-ray photons emitted by the sample are detected, normally by letting them strike a photosensitive surface from which photoelectrons are collected, but also— with the advent of X-ray detectors of increased sensitivity— by direct detection. Above the X-ray emission threshold from a particular core level the excitation probability is a function of the densities of unoccupied electronic states. Since two electrons are involved, the incident and the excited, the shape of the spectral structure is proportional to the self-convolution of the unoccupied state densities. 

Surface resonance Raman spectroscopy Surface Raman spectroscopy specular reflectance speetroscopy Scanning tunneling microscope Sinface-unenhanced Raman spectroscopy Soft X-ray appearance potential spectroscopy Soft X-ray emission spectroscopy Thermodesorption mass spectroscopy Thermal energy atom scattering Third harmonic generation Thin layer cell... 

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