energized species

https://doi.org/10.1351/goldbook.E02100
In an elementary process, a species having sufficient energy to become an @[email protected], but which does not have the structure of the @[email protected] If it is not inactivated by collisions it can become an @[email protected] and pass at once into products, after undergoing vibration.
Source:
PAC, 1996, 68, 149. (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 164 [Terms] [Paper]