Figure 6.

Flash-associated transient 3D spectra of spin polarized ³P₆₈₀ at 532 nm (40 mJ) (a), 610 nm (35 mJ) (b), 689 nm (35 mJ) (c) and 730 nm (20 mJ) (d) (numbers in parentheses denote the laser flash power), laser flash excitation. Each spectrum represents the accumulation of 1000 transients at 32 field positions (low-field peaks) respectively, with a delay time before flash application of 1 ms, at 5 K. The EPR signal was detected ~50 μs after laser excitation with a detection time window of 20 ms. EPR conditions were as follow: microwave power 63 μW, microwave frequency 9.139 GHz, receiver time constant 0.08 ms, modulation amplitude 35 G, temperature, 5 K.