A chemical system or physical device which determines the number of photons
in a beam integrally or per unit time. This name is commonly applied to devices used
in the ultraviolet
ranges. For example, solutions of iron(III) oxalate can be used as a chemical actinometer
, while bolometers, thermopiles, and photodiodes are physical devices giving a reading
that can be correlated to the number of photons detected.
PAC, 1996, 68, 2223
(Glossary of terms used in photochemistry (IUPAC Recommendations 1996))
on page 2227
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