Question
Briefly explain the basic principle of Auger Electron Spectroscopy (AES) with a suitable diagram.
Answer :
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Auger Electron Spectroscopy (AES) is a surface-sensitive analytical technique that provides qualitative and quantitative information about the elemental composition of a material. The basic principle of AES involves the emission of Auger electrons from an atom when it is excited by a high-energy electron beam. When a core-level electron (usually from the K or L shell) is ejected by the incident electron beam, a vacancy is created in the inner shell of the atom. An electron from a higher energy level then fills this vacancy, and the excess energy released can be transferred to another electron, which is subsequently ejected from the atom. This ejected electron is called an Auger electron. The kinetic energy of the Auger electron
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