Models for the NMR parameters in systems of small metal particles

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Abstract
In the literature on nuclear magnetic resonance in small metal particles, three main lines of approach are found which lead to qualitatively different predictions for the behaviour of Knight shift and, where available, for the linewidth. In this paper it is shown how these differences arise as consequences of the different sets of starting hypotheses used in each type of approach. Some characteristics of the nuclear spin-lattice relaxation are discussed as well, and attention is given to experimental considerations.