3+

The dipole reservoir is shown to cause such essential features in RFDS signals as shape asymmetry, sign reversal, and shift of the signal maximum from the nuclear frequency by a value of the order of the NMR linewidth.Es wird gezeigt, daB das Dipolreservoir solche wesentlichen Besonderheiten in RFDS-Signalen wie Asymmetrie der Linienform, Vorzeichenumkehr und Verschiebung des Signalmaximum von der Kernfrequenz von der GroBenordnnng der NMR-Linienbreite verursacht. Basic EquationsLet US consider a system of identical electron-nucleus pairs with S = I = f spins, isolated from the lattice and placed in a high constant magnetic field I& 1 I X .Pulsed ENDOR in the absence of discrete saturation of EPR has been examined theoretically in [4].

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