Fig. 4

Magnetic field dependence of fluorescence intensity. Observed for the crystals in powder form of DPH (red circles), MF (black circles), DF (green circles), and TFL (yellow circles). Relative fluorescence intensity R(B)exp. is the fluorescence intensity (F) at each magnetic field strength (B) normalized to the intensity at 0 T (R(B) = F(B)/F(0)). Magnetic field dependence of fluorescence intensity simulated by the stochastic Liouville equation for each crystal R(B)sim. is shown by solid lines with the same colors as the corresponding data