Electron energy loss spectroscopy
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In electron energy loss spectroscopy a material is exposed to a beam of electrons with a known, narrow range of kinetic energies. Some of the electrons will lose energy in the collision process by exciting vibrational modes of the sample's constituents. The kinetic energies of the outgoing electrons are analysed and an energy spectrum constructed. The spectrum therefore contains information on the vibrational states of the specimen, and comparison with known spectra can help identify the components of the sample.
However, EELS cannot be applied to analyse the quantitative concentration by observing the spectrum. To sum up, EELS is a good tool for detecting the element components of a material.Template:Physics-stub