The peak positions are predicted by the Moseley's law with accuracy much better than experimental resolution of a typical EDX instrument. Its characterization capabilities are due in large part to the fundamental principle that each element has a unique atomic structure allowing a unique set of peaks on its electromagnetic emission spectrum (which is the main principle of spectroscopy). It relies on an interaction of some source of X-ray excitation and a sample. One peak is from the L shell of iron.Įnergy-dispersive X-ray spectroscopy ( EDS, EDX, EDXS or XEDS), sometimes called energy dispersive X-ray analysis ( EDXA or EDAX) or energy dispersive X-ray microanalysis ( EDXMA), is an analytical technique used for the elemental analysis or chemical characterization of a sample. EDS spectrum of the mineral crust of the vent shrimp Rimicaris exoculata Most of these peaks are X-rays emitted when electrons return to the K electron shell ( K-alpha and K-beta lines). For the German airport, see Achmer Aerodrome.
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