At a given point in space, the
radiant energy incident on a small sphere divided by the cross-sectional area of that sphere. It
is used in
photochemistry to specify the energy delivered in a given time interval (for instance by a
laser pulse).
Source:
ISO 31-5: 1992
(Quantities and Units - Part 5: Electricity and Magnetism.)
See also:
PAC, 1996, 68, 2223
(Glossary of terms used in photochemistry (IUPAC Recommendations 1996))
on page 2242
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.
https://doi.org/10.1351/goldbook.
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