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The X-band CW-EPR-generated difference ML signal obtained corresponding to light (≈140 K NIR illumination) minus annealed spectra. Spectrometer conditions: 15 G modulation amplitude, center field 3400 G, sweep width 2500 G, 0.5 mW microwave power, frequency 9.369126 GHz, temperature 6 K, number of points 2500.
