fluence \(F\), \(\varPsi \), \(H_{0}\)

At a given point in space, the @R05039@ incident on a small sphere divided by the cross-sectional area of that sphere. It is used in @P04588@ to specify the energy delivered in a given time interval (for instance by a @L03459@ pulse).
See also:
photon fluence
Green Book, 2nd ed., p. 31 [Terms] [Book]
ISO, 31-5 [Terms] [Book]
See also:
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2242 [Terms] [Paper]