The
photon flow,
,
emitted by an element of the surface containing the source point under consideration divided by the area
(
) of that element.
(
, simplified expression:
when the
photon flow is constant over the surface area considered). The SI unit is
.
Alternatively, the term can be used with the amount of photons (mol or its equivalent
einstein), the SI unit then being
.
Also called
specific photon emission. Formerly called
photon emittance.
Source:
PAC, 1996, 68, 2223
(Glossary of terms used in photochemistry (IUPAC Recommendations 1996))
on page 2262
Cite as:
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.
doi:10.1351/goldbook.
