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Radiofrequency polarization effects in low-field electron paramagnetic resonance

Wedge, Christopher J., Rodgers, Christopher T., Norman, Stuart A., Baker, Neville, Maeda, Kiminori, Henbest, Kevin B., Timmel, C. R. and Hore, P. J. (2009) Radiofrequency polarization effects in low-field electron paramagnetic resonance. Physical Chemistry Chemical Physics, 11 (31). p. 6573. ISSN 1463-9076

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Low-field optically detected EPR spectra of photochemically formed transient radical ion pairs are reported for weak circularly and linearly polarized radiofrequency (RF) fields. The spectra are found to be strongly dependent on the polarization and frequency of the RF field and on the angle between the static magnetic field and the plane containing the RF field. The spectra are discussed in terms of resonances arising from Zeeman and hyperfine interactions; the conditions for validity of the rotating frame approximation are determined. Knowledge of the latter is important when using low-field EPR as a diagnostic test for the operation of the radical pair mechanism.

Item Type: Article
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Schools: School of Applied Sciences
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Depositing User: Christopher Wedge
Date Deposited: 27 Mar 2017 14:02
Last Modified: 28 Aug 2021 12:11


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