doublet state

https://doi.org/10.1351/goldbook.D01853
A state having a total electron spin quantum number equal to \(\frac{1}{2}\).
See:
multiplicity
Source:
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2237 [Terms] [Paper]