Electron spectroscopy

Electron spectroscopy is a spectroscopic technique for material analysis. The basis is the removal of electrons from the outer shells of the atomic shell ( see, eg, photoelectric effect).

The term electron spectroscopy is also used often as a collective term for inspection method in which, by irradiating electrons ( primary electrons ), short -wave UV radiation or X-rays, electrons are removed from the inner shell. The kinetic energy of these electrons is then measured directly or determined from follow-up processes with secondary electron emission or radiation. To the intensity of an electron stream is determined as a function of the kinetic energy of the electrons with the aid of an electron spectrometer.

The measurement result is a spectrum of the kinetic energy with material-specific increases. Electron spectroscopy thus provides not only information about the elements contained in the sample, but results as photoelectron spectroscopy also information about bonding in gases, solids and their surfaces due to the element-specific binding energy of the electrons. The object to be tested is brought into this vacuum, exposed to monochromatic X-rays and the released electrons are analyzed.

Important methods of electron spectroscopy are:

• Photoelectron spectroscopy ( PES)
• Auger electron spectroscopy (AES)
• Electron probe microanalysis (EPMA )
• Electron energy loss spectroscopy ( EELS)

Weblink

• Electron spectroscopy, Uni - Mainz.de

• Atomic Spectroscopy