Term: nuclear transition https://doi.org/10.1351/goldbook.N04241 Definition: For a nucleus a change from one quantized energy state into another or a nuclear transformation. Related Terms: 1) nucleus (http://doi.org/10.1351/goldbook.N04256). 2) nuclear transformation (http://doi.org/10.1351/goldbook.N04240). Source: PAC, 1982, 54, 1533. 'Glossary of terms used in nuclear analytical chemistry (Provisional)' on page 1553 (https://doi.org/10.1351/pac198254081533) Citation: 'nuclear transition' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.N04241 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. 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.