explain the photo electro
spectroscopy (PES)
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The principle upon whichphotoelectron spectroscopy (PES) is based is simple. If a molecule is excited by a high-energy photon in the ultraviolet region of the spectrum that has sufficient energy to ionize the molecule, the excited species will eject electrons.
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Photoelectron spectroscopy (PES) is an experimental technique that measures the relative energies of electrons in atoms and molecules. Scientists often use PES to study the elemental composition of materials or to characterize bonding in molecules.
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