Abstract
Further improvements to the pulsed EPR spectrometer of Huisjen and Hyde [Rev. Sci. Instrum. 45, 669 (1974)] are described. Special attention is given to techniques for separation of free-induction-decay and saturation-recovery signals. The instrument is suitable for determination of spin-lattice relaxation times as short as 10−7 sec, and is designed particularly for measurements on dilute solutions of free radicals and of spin-labeled biomolecules. Analytical solutions of the Bloch equations are obtained that are appropriate for this instrument. The predictions of the equations have been verified by comparison with experiments on the tetracyanoethylene (TCNE) radical anion.
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