fluorescence
fluorescence
"Fluorescence" means light (electromagnetic wave; infrared ray to ultra violet ray to X-ray) emitted from electronically excited states which are created by absorption of incident X-rays, electrons etc. In EDS, fluorescent X-rays are used for element analysis. In a crystal, an electron in the K-shell of an element is excited to an unoccupied state, and then an electron in the L-shell of the element falls to the K-shell, characteristic K X-rays inherent to the element being emitted.
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