Energy or amount of photons absorbed
per volume (or per mass) by an irradiated object during a particular exposure time.
SI units are
, respectively. Common units are
In medicine and in some other research areas (e.g., photopolymerization
and water purification through irradiation
) dose is used in the sense of exposure
, i.e., the energy or amount of photons per surface area (or per volume) impinging upon
an irradiated object during a particular exposure time. This use is not recommended.
The terms photon exposure
and radiant exposure
PAC, 2007, 79, 293
(Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006))
on page 326
This definition supersedes an earlier definition of dose
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