Abstract
STANDARD frequencies obtained from various cæsium atomic beam frequency standards have been compared in a number of instances1–4. The results of Holloway et al. 1 showed agreement to about 2 × 10−10 between the commercial beam standards developed and manufactured by the National Company and the atomic standard at the National Physical Laboratory, Teddington, England4.
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Holloway, J., Mainberger, W., Reder, F. H., Winkler, G. M. R., Essen, L., and Parry, J. V. L., Proc. Inst. Radio Eng., 47, 1732 (1959).
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Essen, L., and Parry, J. V. L., Phil. Trans. Roy. Soc., A, 250, 45 (1957).
Barnes, J. A., and Heim, L. E., “A High Resolution Ammonia Maser Spectrum Analyzer” (to be published).
Markowitz, W., Hall, R. G., Essen, L., and Parry, J. V. L., Phys. Rev. Letters, 1, 106 (1958).
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BEEHLER, R., MOCKLER, R. & SNIDER, C. A Comparison of Atomic Beam Frequency Standards. Nature 187, 681–682 (1960). https://doi.org/10.1038/187681a0
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DOI: https://doi.org/10.1038/187681a0
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