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It is shown that the molecular beam magnetic resonance method for measuring nuclear magnetic moments is capable of determining the sign of a nuclear moment even though an oscillating perturbing field is substituted for the rotating field required by the theory. The sign determination is obtained from an asymmetry in the resonance curve introduced by the end effects of the oscillating field. The signs of the nuclear moments of Li^6, Li^7 and F^19 were found to be positive, in agreement with known results.
S. Millman (1939) studied this question.