Abstract
The contribution from pion currents to the magnetic moment of a nucleon in nuclear matter is considered. It is shown that this effect is obtained by imposing gauge-invariance on the charge-exchange part of the one-pion exchange potential. In the absence of correlations this mechanism is known to give a “quenchingrd of the moment. The change in the isovector part of the intrinsic magnetic moment is evaluated in a model which allows spin-dependent two-nucleon correlations as well as hardcore interactions. In the presence of correlations produced by the long-range tensor part of the one-pion exchange potential the moment is found to be enhanced by 0.26 nuclear magnetons. The present theory is incapable of predicting isoscalar contributions to the single-particle moments.
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