IUPAC > Gold Book > alphabetical index > F > fluence rate, E o
icon

IndexesDownload


fluence rate, E o

Also contains definitions of: radiant energy fluence rate, spherical irradiance

Total radiant power, P, incident from all directions onto a small sphere divided by the cross-sectional area of that sphere. SI unit is W m −2.
Notes:
  1. Mathematical definition: E o = d P d S = d H o d t. If the radiant power is constant over the area S, E o = P S. Equivalent definition: E o = ∫ 4 π L ⁢ d Ω, with Ω the solid angle of each beam passing through the given point on the surface and L the radiance of the beam at that point.
  2. Fluence rate is identical to spherical irradiance and reduces to irradiance, E, for a parallel and perpendicularly incident beam not scattered or reflected by the target or its surroundings.
Source:
PAC, 2007, 79, 293 (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 340
Interactive Link Maps
First LevelSecond LevelThird Level
GraphGraphGraph
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.
Last update: 2014-02-24; version: 2.3.3.
DOI of this term: doi:10.1351/goldbook.FT07376.
Original PDF version: http://www.iupac.org/goldbook/FT07376.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.
Current PDF version | Version for print | History of this term
picture