photochemical equivalence

https://doi.org/10.1351/goldbook.P04583
According to the principle of photochemical equivalence, there is a one-to-one relationship between the number of photons absorbed by a system and the number of excited species produced. The principle often fails for light of high intensity (e.g. @L03459@ beams), when molecules may absorb more than one photon.
Source:
PAC, 1996, 68, 149. (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 176 [Terms] [Paper]
Citation: 'photochemical equivalence' 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.P04583 RIS BibTex EndNote
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Last revised: February 24, 2014