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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 65, Iss. 2 — Feb. 1, 1975
  • pp: 199–204

Absolute measurement of very low sodium-vapor densities using laser resonance fluorescence

W. M. Fairbank, Jr., T. W. Hänsch, and A. L. Schawlow  »View Author Affiliations

JOSA, Vol. 65, Issue 2, pp. 199-204 (1975)

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By use of a cw dye laser, the resonance-fluorescence method is used to make absolute density measurements of sodium vapor from 102 atoms/cm3 at -28°C to 1011 atoms/cm3 at 144°C. The results are compared with other measurements at higher temperature by a thermodynamic analysis. A new vapor-pressure curve is derived, which is slightly different from previous curves based on the higher-temperature measurements. The application of laser resonance fluorescence to other species is also discussed. In particular, a scheme for detecting sodium-quark atoms, if they exist, with a sensitivity of nq/nB~10-15, is proposed.

W. M. Fairbank, Jr., T. W. Hänsch, and A. L. Schawlow, "Absolute measurement of very low sodium-vapor densities using laser resonance fluorescence," J. Opt. Soc. Am. 65, 199-204 (1975)

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