09433 IUPAC Gold Book - useful ion yield 10.1351/goldbook.09433 09433 current 1 In secondary ion mass spectrometry, number of ions of a particular isotope detected divided by the number of atoms of the same element sputtered from the sample. secondary ion mass spectrometry https://goldbook.iupac.org//terms/view/09192 PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1846 (https://doi.org/10.1515/pac-2019-0404) https://goldbook.iupac.org/terms/view/09433/html https://goldbook.iupac.org/terms/view/09433/json https://goldbook.iupac.org/terms/view/09433/plain Citation: 'useful ion yield' 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.09433 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. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . 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. 2026-08-08T22:50:26+00:00