Title: intrinsic photopeak efficiency Long Title: IUPAC Gold Book - intrinsic photopeak efficiency DOI: 10.1351/goldbook.I03139 Status: current Definition The detector efficiency when only counts resulting from the photoelectrical effect are considered. Related Term - photoelectrical effect: https://dev.goldbook.iupac.org/terms/view/P04601 Source - PAC, 1982, 54, 1533. 'Glossary of terms used in nuclear analytical chemistry (Provisional)' on page 1548 (https://doi.org/10.1351/pac198254081533) Other Outputs - html: https://dev.goldbook.iupac.org/terms/view/I03139/html - json: https://dev.goldbook.iupac.org/terms/view/I03139/json - xml: https://dev.goldbook.iupac.org/terms/view/I03139/xml Citation: Citation: 'intrinsic photopeak efficiency' 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.I03139 License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. Accessed: 2026-01-17T23:16:07+00:00