{"term":{"id":"08588","title":"difference transition","longtitle":"IUPAC Gold Book - difference transition","doi":"10.1351\/goldbook.08588","code":"08588","status":"current","synonym":"<em>synonyms<\/em>: difference band, difference tone","definitions":[{"id":1,"text":"Combination transition that does not start at the ground state and in which at least one vibration decreases and at least one vibration increases its degree of excitation; i.e., a transition in which more than one vibrational quantum number changes and at least one becomes smaller.","notes":{"1":"A difference band or difference tone results from a difference transition."},"links":[{"term":"Combination transition","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/08580"}],"sources":["PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 743 (https:\/\/doi.org\/10.1515\/pac-2019-0203)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/08588\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/08588\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/08588\/plain"},"citation":"Citation: 'difference transition' 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.08588","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":"2026-07-02T07:31:05+00:00"}}