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actinometer
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actinometer

Instrument devised by English astronomer John Herschel in 1825 to measure the amount of heat received from the Sun by a given surface in a given time.

The term is now sometimes used to describe any instrument having this purpose, for example a pyrometer.

‘Actinic’ is sometimes used to describe the chemical action of radiant energy, the most common being that on a photographic plate. Thus actinometer is an alternative name for what is now usually described as a photographic exposure meter.



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The incident fluence rate for the given collimated beam and reactor was determined using iodide-iodate actinometry (described below).
The fate of natural organic matter during UV/[H.sub.2][O.sub.2] ... by Sarathy, Siva; Mohseni, Madjid / Canadian Journal of Civil Engineering
], I is the light intensity determined using potassium ferrioxalate actinometry (10), and t is the time of irradiation.
Solvolysis and ring closure of quinone methides photogenerated from ... by Shi, Yijian; Wan, Peter / Canadian Journal of Chemistry
Actinometry was performed using a Power Puck[R] from
New low-viscosity acrylic-urethane prepolymers and their acrylated ... by Smyth, Scott / JCT Research
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