The Excitation subnode is available from the context menu (right-click the Collisions parent node) or from the Physics toolbar, Attributes menu. The Excitation subnode causes particles to undergo inelastic collisions with the background gas, in which some amount of kinetic energy is expended to raise the background gas molecule or ion to an excited state.

See Elastic for information about the Collision Statistics and New Value of Auxiliary Dependent Variables sections.

These settings are the same as for the Elastic subnode with the addition of entering a value for the Energy loss ΔE (SI unit: J). The default value is 0. Typical values for electron impact collisions are between 6 eV and 10 eV.