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 (S0Tn) 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]