Radiofrequency polarization effects in zero-field electron paramagnetic resonance.
Rodgers CT., Wedge CJ., Norman SA., Kukura P., Nelson K., Baker N., Maeda K., Henbest KB., Hore PJ., Timmel CR.
Optically detected zero-field electron paramagnetic resonance spectroscopy is used to show that weak linearly and circularly polarized radiofrequency magnetic fields affect the recombination reactions of spin-correlated radical pairs to different extents; the spectra are shown to be consistent with the radical pair mechanism.