Figure 6.

(A) Field-dependent D-band Davies ENDOR of (3,5)F₂Y· in RNR β2 in the frequency range from 160–233 MHz. Experimental data are shown in black, the total simulated spectrum is in red, and isolated contributions from ¹H and ¹⁹F nuclei are in blue and green, respectively. Resolved peaks and assigned nuclei are denoted with black brackets. (B) Full ENDOR spectrum acquired at B₀ ≈ g_z (4643 mT). Broad signal associated with the ¹⁹F_3,5A_z component is denoted with the black bracket below the experimental spectrum. Acquisition parameters: Temperature = 30 K; MW Frequency = 129.996 GHz; π/2_MW = 37.5 ns; π_RF = 24 μs; τ = 300 ns; shot rep time (srt) = 10 ms.