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The observation of well-defined oscillations in rubidium of known crystallographic orientation is reported. The data give an oscillation period of 6.13 x 10/sup -9/ gauss/sup -1/. This result was obtained by averaging the values from each side of the magnetic field peak to eliminate errors due to any phase-shift or pick-up in the field measuring circuit. This corresponds to an external area of the Fermi surface of about 1.56 x 10 /sup 16/ cm/sup -2/, a possible distortion in area of some 2%. The peaks in the oscillations are an incidental result of tuning the pick-up coil to resonate at 60 kc/s, which improves the signal-to-noise ratio in this range. (N.W.R.)
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Okumura et al. (1962) studied this question.
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