We have measured the absolute Knight shift of Li⁷ in lithium metal by observing the Li⁷ nuclear resonance frequency as a function of conduction-electron paramagnetism. The latter was varied by saturating the conduction-electron spin resonance with microwave power. By using two slightly different techniques we obtain K=243±10 ppm and K253±8 ppm. Some of the difficulties and inherent uncertainties of the experiment are discussed in detail.
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Schumacher et al. (1966) studied this question.
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