3669
J . Phys. Chem. 1988, 92, 3669-3674
gram and the estimate from the EPR saturation factor. The previous conclusions drawn about the T2mechanism remain valid when these shorter average T2values are considered. Although the free induction decay has not been analyzed quantitatively in this study, the shorter time scale on which it is observed would suggest that it is detecting generally larger fractions of the spins present in the samples than is the spin echo decay. The construction of a pulsed EPR spectrometer to be operated at higher microwave power is planned in order to achieve the
