These terms relate to the steepness of the energy rise along the @R05174@ of a @P04780@.
Source: PAC, 1996, 68, 149. (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 167 [Terms] [Paper]
Citation: 'gradual (sudden) potential-energy surface' in IUPAC Compendium of Chemical Terminology, 3rd ed. International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. https://doi.org/10.1351/goldbook.G02674 RISBibTexEndNote