x-ray photoelectron spectroscopy
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x-ray photoelectron spectroscopy[′eks ‚rā ¦fōd·ō·i¦lek‚trän spek′träs·kə·pē]
A form of electron spectroscopy in which a sample is irradiated with a beam of monochromatic x-rays and the energies of the resulting photoelectrons are measured. Abbreviated XPS. Also known as electron spectroscopy for chemical analysis (ESCA).