nuclear isomers 

https://doi.org/10.1351/goldbook.N04234
Nuclides having the same mass number and atomic number, occupying different nuclear energy states.
Source:
PAC, 1982, 54, 1533. (Glossary of terms used in nuclear analytical chemistry (Provisional)) on page 1545 [Terms] [Paper]
Citation: 'nuclear isomers' 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.N04234 RIS BibTex EndNote
Div. VPDFTextXMLJSON
Last revised: February 24, 2014