spectral responsivity

The spectral output quantity of a system such as a photomultiplier, diode array, @I02944@ device, or biological unit divided by the @S05817@ \(s(\lambda) = \frac{\text{d}y\left(\lambda \right)}{\text{d}E\left(\lambda \right)}\), simplified expression: \(s(\lambda) = \frac{Y_{\lambda }}{E_{\lambda }}\), where \(Y_{\lambda }\) is the magnitude of the output signal for @I03255@ at @W06659@ \(\lambda \) and \(E_{\lambda }\) is the @S05817@ of the parallel and perpendicular incident beam at the same @W06659@.
See also:
PAC, 1995, 67, 1745. (Nomenclature, symbols, units and their usage in spectrochemical analysis-XI. Detection of radiation (IUPAC Recommendations 1995)) on page 1749 [Terms] [Paper]
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2276 [Terms] [Paper]