09339 IUPAC Gold Book - initial-state Auger parameter 10.1351/goldbook.09339 09339 current 1 \(\beta = 3E_{\rm{B}} + E_{\rm{K}}\), where \(E_{\rm{B}}\) and \(E_{\rm{K}}\) are, respectively, the binding energy of a photoelectron peak and the Fermi level referenced (see Fermi level referencing) kinetic energy of an Auger electron peak, each involving the same initial core level of the same element. The initial-state Auger parameter is useful for evaluating the change in the atomic core potential contribution to changes in binding energy between two environments, provided the Auger transition is between core levels that have similar binding energy shifts. This parameter has no relation to the asymmetry parameter, which is also given the symbol \(\beta\). Auger parameter https://goldbook.iupac.org//terms/view/09308 Fermi level referencing https://goldbook.iupac.org//terms/view/09332 asymmetry parameter https://goldbook.iupac.org//terms/view/09306 modified Auger parameter https://goldbook.iupac.org//terms/view/09343 PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1827 (https://doi.org/10.1515/pac-2019-0404) https://goldbook.iupac.org/terms/view/09339/html https://goldbook.iupac.org/terms/view/09339/json https://goldbook.iupac.org/terms/view/09339/plain Citation: 'initial-state Auger parameter' 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.09339 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. 2026-04-18T10:25:46+00:00