Change in the rate of a chemical reaction or its @[email protected] under the action of @[email protected], @[email protected] or @[email protected] radiation in the presence of a substance—the @[email protected]—that absorbs light and is involved in the chemical @[email protected] of the reaction partners.
PAC, 2007, 79, 293. (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 384 [Terms] [Paper]