Title: photoemissive detector
Long Title: IUPAC Gold Book - photoemissive detector
DOI: 10.1351/goldbook.P04612
Status: current

Definition
A detector in which a photon interacts with a solid surface, which is called the photocathode, or a gas, releasing a photoelectron. This process is called the external photoelectric effect. The photoelectrons are collected by an electrode at positive electric potential, i.e. the anode.

Related Terms
- anode: https://goldbook.iupac.org//terms/view/A00370
- detector: https://goldbook.iupac.org//terms/view/R05054
- electric potential: https://goldbook.iupac.org//terms/view/E01935

Source
- PAC, 1995, 67, 1745. 'Nomenclature, symbols, units and their usage in spectrochemical analysis-XI. Detection of radiation (IUPAC Recommendations 1995)' on page 1752 (https://doi.org/10.1351/pac199567101745)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/P04612/html
- json: https://goldbook.iupac.org/terms/view/P04612/json
- xml: https://goldbook.iupac.org/terms/view/P04612/xml

Citation: Citation: 'photoemissive detector' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.P04612
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Accessed: 2026-05-12T17:06:29+00:00