an electronic transition in an atom, molecule, etc, that is not permitted by electric dipole selection rules
Examples of 'forbidden transition' in a sentence
forbidden transition
The intensity enhancements for the forbidden transition observed are ascribed to perturbation forces between the solute and solvent molecules.
Sikiru A. Ahmed, Nelson O. Obi-Egbedi, Janet T. Bamgbose, Abideen I. Adeogun 2016, 'Solvent enhancement of electronic intensity in acridine and 9-aminoacridine', Journal of Saudi Chemical Societyhttp://www.sciencedirect.com/science/article/pii/S131961031200169X. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)