Frequency dependence of pulsed EPR experiments

Abstract

The frequency dependence of the signal-to-noise ratio (S/N) that is theoretically possible for pulsed electron paramagnetic resonance (EPR) experiments is the same as for continuous wave experiments. To select the optimum resonance frequency or frequencies for pulsed EPR experiments it is important to consider not only S/N, but also orientation selection, depth of spin echo modulation, and intensities of forbidden transitions. Evaluation of factors involved in selecting the optimum frequency for pulsed EPR measurements of distances between spins is discussed. © 2009 Wiley Periodicals, Inc.