The correction of modulation broadened magnetic resonance signals by Fourier transformation

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Abstract
It is shown that, in the absence of saturation, this method, which can be applied for arbitrary line shape functions, provides the true line shape as well as any of its derivatives. The same holds if saturation is present, provided that the modulation frequency is small compared with the spin-lattice relaxation rate and the induced transition probability. The influence of the correction procedure on noise is also investigated.