Abstract

We have made a precise comparison of the wavelength passed by a Hg<sup>198</sup> Zeeman filter with that of the 2537-Å absorption line of an atomic beam. This was done by passing the light from the filter through the atomic beam and then comparing the amplitudes of the two peaks in the resulting reversed lines. A calibration was obtained by measuring the ratio of peak amplitudes with the beam tilted at various angles to the optic axis so as to introduce known Doppler shifts. The wavelengths of the Zeeman filter and atomic beam are shown to be equal to about one part in 10<sup>9</sup>.

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  1. K. G. Kessler, R. L. Barger, and W. G. Schweitzer, Jr., "Mercury Atomic Beams for Metrology," Symposium No. 11 Interferometry (Her Majesty's Stationery Office, London, 1960), p. 67.
  2. K. G. Kessler and W. G. Schweitzer, Jr., J. Opt. Soc. Am. 49, 199 (1959).
  3. K. G Kessler and W. G. Schweitzer, Jr. (to be published).
  4. W. G. Schweitzer, Jr., J. Opt. Soc. Am. 53, 1250 (1963).
  5. W. G. Fastie (private communication).
  6. V. G. Schweitzer, Jr., Ph.D. thesis, University of Maryland, 1962 (unpublished).
  7. The oxide-coated cathodes were given to us by B. T. Barnes of the General Electric Company, Lamp Division.
  8. The idea of using 1000 cps instead of 60 cps was suggested, for this reason, by Baird and Smith in their studies of krypton lamps. Refer to K. M. Baird and D. S. Smith, J. Opt. Soc. Am. 52, 510 (1962).
  9. The probability associated with this value of Students' t is approximately 0.25 which is not near the probability values usually associated with statistical significance, 0.01 or 0.05.
  10. C. Goodman, Rev. Sci. Instr. 9, 233 (1938).

Kessler, K. G

K. G Kessler and W. G. Schweitzer, Jr. (to be published).

Schweitzer, Jr., W. G.

K. G Kessler and W. G. Schweitzer, Jr. (to be published).

Baird, K. M.

The idea of using 1000 cps instead of 60 cps was suggested, for this reason, by Baird and Smith in their studies of krypton lamps. Refer to K. M. Baird and D. S. Smith, J. Opt. Soc. Am. 52, 510 (1962).

Barger, R. L.

K. G. Kessler, R. L. Barger, and W. G. Schweitzer, Jr., "Mercury Atomic Beams for Metrology," Symposium No. 11 Interferometry (Her Majesty's Stationery Office, London, 1960), p. 67.

Barnes, B. T.

The oxide-coated cathodes were given to us by B. T. Barnes of the General Electric Company, Lamp Division.

Fastie, W. G.

W. G. Fastie (private communication).

Goodman, C.

C. Goodman, Rev. Sci. Instr. 9, 233 (1938).

Kessler, K. G.

K. G. Kessler and W. G. Schweitzer, Jr., J. Opt. Soc. Am. 49, 199 (1959).

K. G. Kessler, R. L. Barger, and W. G. Schweitzer, Jr., "Mercury Atomic Beams for Metrology," Symposium No. 11 Interferometry (Her Majesty's Stationery Office, London, 1960), p. 67.

Schweitzer, Jr., V. G.

V. G. Schweitzer, Jr., Ph.D. thesis, University of Maryland, 1962 (unpublished).

Schweitzer, Jr., W. G.

K. G. Kessler and W. G. Schweitzer, Jr., J. Opt. Soc. Am. 49, 199 (1959).

W. G. Schweitzer, Jr., J. Opt. Soc. Am. 53, 1250 (1963).

K. G. Kessler, R. L. Barger, and W. G. Schweitzer, Jr., "Mercury Atomic Beams for Metrology," Symposium No. 11 Interferometry (Her Majesty's Stationery Office, London, 1960), p. 67.

Smith, D. S.

The idea of using 1000 cps instead of 60 cps was suggested, for this reason, by Baird and Smith in their studies of krypton lamps. Refer to K. M. Baird and D. S. Smith, J. Opt. Soc. Am. 52, 510 (1962).

Other (10)

K. G. Kessler, R. L. Barger, and W. G. Schweitzer, Jr., "Mercury Atomic Beams for Metrology," Symposium No. 11 Interferometry (Her Majesty's Stationery Office, London, 1960), p. 67.

K. G. Kessler and W. G. Schweitzer, Jr., J. Opt. Soc. Am. 49, 199 (1959).

K. G Kessler and W. G. Schweitzer, Jr. (to be published).

W. G. Schweitzer, Jr., J. Opt. Soc. Am. 53, 1250 (1963).

W. G. Fastie (private communication).

V. G. Schweitzer, Jr., Ph.D. thesis, University of Maryland, 1962 (unpublished).

The oxide-coated cathodes were given to us by B. T. Barnes of the General Electric Company, Lamp Division.

The idea of using 1000 cps instead of 60 cps was suggested, for this reason, by Baird and Smith in their studies of krypton lamps. Refer to K. M. Baird and D. S. Smith, J. Opt. Soc. Am. 52, 510 (1962).

The probability associated with this value of Students' t is approximately 0.25 which is not near the probability values usually associated with statistical significance, 0.01 or 0.05.

C. Goodman, Rev. Sci. Instr. 9, 233 (1938).

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