Preferred Label : appearance energy;
Detailed label : appearance energy (appearance potential);
IUPAC definition : Refers to ionization of a molecule or atom by electron collision or photon absorption.
In mass spectrometry it has often been reported as the voltage which corresponds to
the minimum energy of the electrons in the ionizing beam necessary for the production
of a given fragment ion. In photoionization it is the minimum energy of the quantum
of light which produces ionization of the absorbing molecule.;
Origin ID : A00421;
See also
Refers to ionization of a molecule or atom by electron collision or photon absorption.
In mass spectrometry it has often been reported as the voltage which corresponds to
the minimum energy of the electrons in the ionizing beam necessary for the production
of a given fragment ion. In photoionization it is the minimum energy of the quantum
of light which produces ionization of the absorbing molecule.
