Cr. Timmel et al., Model calculations of magnetic field effects on the recombination reactions of radicals with anisotropic hyperfine interactions, CHEM P LETT, 334(4-6), 2001, pp. 387-395
The effects of anisotropic hyperfine interactions on the recombination reac
tions of spin correlated radical pairs in a weak applied magnetic field are
discussed in the context of the radical pair mechanism (RPM). Model calcul
ations are presented for radical pairs containing a single spin-1/2 nucleus
with an axial or rhombic coupling to one of the Impaired electrons. The so
-called low field effect (LFE) and various resonances in the magnetic field
effect (MFE) are calculated. Approximate analytical expressions are given
for the field positions of the resonances which are shown to arise from ene
rgy level crossings. (C) 2001 Elsevier Science B.V. All rights reserved.