spectral photon radiance, $L p λ$

The photon radiance, $L p$ , at wavelength per unit wavelength interval. The SI unit is $s −1 m −3 sr −1$ , but a commonly used unit is $s −1 m −2 sr −1 nm −1$ . Alternatively, the term can be used with the amount of photons (mol or its equivalent einstein) the SI unit then being $mol s −1 m −3 sr −1$ and the common unit $mol s −1 m −2 sr −1 nm −1$ .

Source:

PAC, 1996, 68, 2223 (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2276

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IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook.

Last update: 2014-02-24; version: 2.3.3.

DOI of this term: https://doi.org/10.1351/goldbook.S05822.

Original PDF version: http://www.iupac.org/goldbook/S05822.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.

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spectral photon flux (photon irradiance), $E p λ$		spectral quantities