PHOSPHORESCENCE AND DELAYED FLUORESCENCE DETECTED MAGNETIC-RESONANCE AT ZERO-FIELD ON THE 1-1 CT-CRYSTAL ANTHRACENE-TCNB

ODMR (optical detected magnetic resonance) experiments on A/TCNB at 1.2 K, in which the delayed fluorescence is monitored, exhibit very striking features: the microwave transitions appear always as doublets; with increasing power the sign of the ODMR signals is inverted and the lines constituting the doublet exhibit coupled behaviour in hole burning studies. These features are discussed in terms of RF transitions occuring before and during the annihilation process. © 1979.