{"term":{"id":"09355","title":"Shirley background","longtitle":"IUPAC Gold Book - Shirley background","doi":"10.1351\/goldbook.09355","code":"09355","status":"current","definitions":[{"id":1,"text":"In Auger electron spectroscopy and X-ray photoelectron spectroscopy, background calculated to fit the measured spectrum at points at greater and lesser kinetic energy than the peak or peaks of interest, such that the background contribution at a given kinetic energy is in a fixed proportion to the total peak area above that background for greater kinetic energies.","notes":{"1":"Fitting to the background can be made by averaging over a given number of energy channels."},"links":[{"term":"Auger electron spectroscopy","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/09172"},{"term":"Tougaard background","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/09360"}],"sources":["PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1830 (https:\/\/doi.org\/10.1515\/pac-2019-0404)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/09355\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/09355\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/09355\/plain"},"citation":"Citation: 'Shirley background' 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.09355","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":"2026-04-21T02:19:51+00:00"}}