conversion cross-section 

https://doi.org/10.1351/goldbook.CT07349
Product of the quantum yield by the absorption cross-section, σ Φ. SI unit is m2; commonly expressed in cm2.
Source:
PAC, 2007, 79, 293. (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 318 [Terms] [Paper]
Citation: 'conversion cross-section' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.CT07349 RIS BibTex EndNote
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Last revised: February 24, 2014