Term: spectral sensitivity, \(S(\lambda)\)
https://doi.org/10.1351/goldbook.ST07395

Definition:
Referred to actinometers based on spectrophotometric measurements, S ac λ = Φ λ ɛ λ obs = sensitivi. Φ λ is the quantum yield of the actinometers at the excitation wavelength and λ obs is the observation wavelength, which may be the same as or differ from the former.

Related Terms:
1) actinometer (http://doi.org/10.1351/goldbook.A00087).
2) quantum yield (http://doi.org/10.1351/goldbook.Q04991).
3) wavelength (http://doi.org/10.1351/goldbook.W06659).

Source: PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 426 (https://doi.org/10.1351/pac200779030293)

Citation: 'spectral sensitivity, \(S(\lambda)\)' 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.ST07395

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