singlet-triplet absorption

https://doi.org/10.1351/goldbook.S05700
Absorption which takes place with the transition from the singlet ground state of the molecule to triplet states (\(\rm{S}_{0}\) → \(\rm{T}_{\rm{n}}\)) and results in the singlet-triplet absorption spectrum.
Source:
PAC, 1984, 56, 231. (Nomenclature, symbols, units and their usage in spectrochemical analysis-Part VI: molecular luminescence spectroscopy) on page 234 [Terms] [Paper]