Energy Dispersive X-ray Spectroscopy

Definition - What does Energy Dispersive X-ray Spectroscopy mean?

Energy dispersive X-ray spectroscopy (EDXA, EDS, XEDS or EDXS) is used as an analytical technique to perform an elemental analysis and understand the chemical characteristics of a test sample.

Energy dispersive X-ray spectroscopy makes use of the x-ray portion of the electromagnetic spectrum that is emitted by solid samples when they are bombarded by a focused electron beams. Every element from atomic number 4 through 92 can be identified using this technique, although not all methods are appropriate for the lighter elements.

Energy dispersive X-ray spectroscopy may also be known as energy dispersive X-ray analysis.

Corrosionpedia explains Energy Dispersive X-ray Spectroscopy

There are four major components of an energy dispersive x-ray spectroscopy system:

  • X-ray or electron beam (excitation source)
  • Pulse processor
  • X-ray detector
  • Analyzer

Using this technique, any excess electron energy migrates to a shell to fill in new holes in excess of what a single X-ray can emit. The X-ray intensities are measured by counting the photons. Precise measurements are possible with this method.

Because it is fast, accurate and produces good resolution, this test is highly preferred for material analysis, both qualitative and quantitative.
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