Term: X-ray photoelectron spectroscopy (XPS)
https://doi.org/10.1351/goldbook.X06716

Definition:
Any technique in which the sample is bombarded with X-rays and photoelectrons produced by the sample are detected as a function of energy. ESCA (Electron Spectroscopy for Chemical Analysis) refers to the use of this technique to identify elements, their concentrations, and their chemical state within the sample.

Related Terms:
1) spectroscopy (http://doi.org/10.1351/goldbook.S05848).

Source: Orange Book, 2nd ed., p. 250 (https://media.iupac.org/publications/analytical_compendium/)

Citation: 'X-ray photoelectron spectroscopy (XPS)' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.X06716

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