Figure 1

(a) Ratio of \(\Phi _S\) percentages, S plotted in the \(k-r\) plane for the Ser Oxyradical case. The lighter yellow areas are closest in value to the ratios seen in Tables 1 and 2. (b) Variation of \(\Phi _S\) percentage with magnetic field strength ranging from 0.15 to 100 mT. The figure is plotted with \(k = 2 \times 10^6 \text{s}^{-1}\) and \(r = 1 \times 10^6 \text{s}^{-1}\), which corresponds to \(S = 1.24\). All the figures are plotted considering the HFI contribution from the hydrogen atom of the Serine oxyradical with the highest HFCC, \(a_A = 7.45\) mT. We also consider the contribution of the \(^{25}\)Mg isotope at its natural abundance of 10%. The HFI contribution from the same is \(a_B = -\,11.22\) mT.