sum transition

https://doi.org/10.1351/goldbook.08685
Combination transition between the ground state and a state in which more than one vibration is excited; i.e., a transition from the ground state in which more than one quantum number increases.
Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 764 [Terms] [Paper]
Citation: 'sum 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.08685 RIS BibTex EndNote
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