Figure 5. The triplet yield reduction ΔφT is plotted for N = 5 as a function of the hyperfine coupling A for three nuclei coupled to radical 1 and two nuclei coupled to radical 2, and the frequency ω of the radicals in the effective field Beff.
The magnitudes of the hyperfine couplings are given by 
. The recombinations rates are given by kS = kT = k = 1/tf for times tf of (a) 10, (b) 15 and (c) 20 ns. The interradical coupling J as well as the temperature of the environmental nuclei are set to zero.