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Penning ionization is a form of chemi-ionization, an ionization process involving reactions between neutral atoms and/or molecules. The term Penning ionization refers to the interaction between a gas-phase excited-state atom or molecule G* and a target molecule M resulting in the formation of a radical molecular cation M+., an electron e- and a neutral gas molecule G.
Additional recommended knowledge
Associative Penning ionization can occur:
Surface Penning ionization refers to the interaction of the excited-state gas with a surface S, resulting in the release of an electron.
Penning ionization occurs when the target molecule has an ionization potential lower than the internal energy of the excited-state atom or molecule. The process was first reported by F.M. Penning in 1927.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Penning_ionization". A list of authors is available in Wikipedia.|