Appearance energy
(Redirected from Appearance potential spectroscopy)
Appearance energy (also known as appearance potential) is the minimum energy that must be supplied to a gas phase atom or molecule in order to produce an ion. In mass spectrometry, it is accounted as the voltage to correspond for electron ionization. [1] This is the minimum electron energy that produces an ion.[2] In photoionization, it is the minimum photon energy of a photon that produces some ion signal. For example, the indene bromide ion (IndBr+) only loses bromine at an incident photon energy of 10.2 eV, so the product, indenyl, has an appearance energy of 10.2 eV.[3]
See also
[edit | edit source]References
[edit | edit source]- ^ IUPAC, Compendium of Chemical Terminology, 5th ed. (the "Gold Book") (2025). Online version: (2006–) "Appearance energy". Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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