Advantage of pes spectroscopy than other form of spectroscopyh
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Photoelectron spectroscopy utilizes photo-ionization and analysis of the kinetic energy distribution of the emitted photoelectrons to study the composition and electronic state of the surface region of a sample.
Traditionally, when the technique has been used for surface studies it has been subdivided according to the source of exciting radiation into :
X-ray Photoelectron Spectroscopy (XPS)
- using soft x-rays (with a photon energy of 200-2000 eV) to examine core-levels.
Ultraviolet Photoelectron Spectroscopy (UPS)
- using vacuum UV radiation (with a photon energy of 10-45 eV) to examine valence levels.
The development of synchrotron radiation sources has enabled high resolution studies to be carried out with radiation spanning a much wider and more complete energy range ( 5 - 5000+ eV ) but such work remains a small minority of all photoelectron studies due to the expense, complexity and limited availability of such sources
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Traditionally, when the technique has been used for surface studies it has been subdivided according to the source of exciting radiation into :
X-ray Photoelectron Spectroscopy (XPS)
- using soft x-rays (with a photon energy of 200-2000 eV) to examine core-levels.
Ultraviolet Photoelectron Spectroscopy (UPS)
- using vacuum UV radiation (with a photon energy of 10-45 eV) to examine valence levels.
The development of synchrotron radiation sources has enabled high resolution studies to be carried out with radiation spanning a much wider and more complete energy range ( 5 - 5000+ eV ) but such work remains a small minority of all photoelectron studies due to the expense, complexity and limited availability of such sources
hope it helps you
plz mark it as a brainliest answer
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