Abstract

The sensitivity of the resonance-fluorescence method for the measurement of very-low sodium-vapor densities (<10<sup>10</sup> atoms/cm<sup>3</sup>) has been studied. Light from a sodium spectral lamp is sent through a sodium-containing vessel, whose temperature can be varied. The vapor density has been measured in the region of 47–146 °C. At 47 °C, the vapor density is about 10<sup>7</sup> atoms/cm<sup>3</sup> . The measurements were performed with both a photon-counting device and a lock-in amplifier. The experimental results have been normalized to absolute density data given in the literature. Fitting our points to the equation log<i>N</i> = <i>a</i> + <i>b</i> / <i>T</i> yields the values <i>a</i> = 23.715 and <i>b</i> = -5257.7 <i>K</i>.

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  1. L. C. J. Baghuis and H. L. Hagedoorn, Physica (Utr.) 65, 163 (1973).
  2. L. C. J. Baghuis, H. L. Hagedoorn, and J. A. van der Heide, in Proceedings of the Eleventh International Conference on Phenomena in Ionized Gases, 1973 (Czechoslovak Academy of Sciences, Prague, 1973), pp. 478 and 479.
  3. S. M. Jarrett and P. A. Franken, J. Opt. Soc. Am. 55, 1603 (1965).
  4. N. Ioli and F. Strumia, J. Opt. Soc. Am. 61, 1251 (1971).
  5. J. W. Chamberlain, D. M. Hunten, and J. E. Mack, J. Atm. Terr. Phys. 12, 153 (1958).
  6. T. M. Donahue, R. Resnick, and V. R. Stull, Phys. Rev. 104, 873 (1956).
  7. J. Kuhl and G. Marowsky, Opt. Commun. 4, 125 (1971).
  8. D. A. Jennings and R. A. Keller, J. Am. Chem. Soc. 94, 9249 (1972).
  9. A. Mitchell and M. Zemansky, Resonance Radiation and Excited Atoms (Cambridge U. P., New York, 1971), pp. 92–106.
  10. G. Schulz and W. Stopp, Z. Phys. 210, 223 (1968).
  11. A. N. Nesmeyanov, Vapor Pressure of the Chemical Elements (Elsevier, Amsterdam, 1963), pp. 128–137.

Baghuis, L. C. J.

L. C. J. Baghuis and H. L. Hagedoorn, Physica (Utr.) 65, 163 (1973).

L. C. J. Baghuis, H. L. Hagedoorn, and J. A. van der Heide, in Proceedings of the Eleventh International Conference on Phenomena in Ionized Gases, 1973 (Czechoslovak Academy of Sciences, Prague, 1973), pp. 478 and 479.

Chamberlain, J. W.

J. W. Chamberlain, D. M. Hunten, and J. E. Mack, J. Atm. Terr. Phys. 12, 153 (1958).

Donahue, T. M.

T. M. Donahue, R. Resnick, and V. R. Stull, Phys. Rev. 104, 873 (1956).

Franken, P. A.

S. M. Jarrett and P. A. Franken, J. Opt. Soc. Am. 55, 1603 (1965).

Hagedoorn, H. L.

L. C. J. Baghuis, H. L. Hagedoorn, and J. A. van der Heide, in Proceedings of the Eleventh International Conference on Phenomena in Ionized Gases, 1973 (Czechoslovak Academy of Sciences, Prague, 1973), pp. 478 and 479.

L. C. J. Baghuis and H. L. Hagedoorn, Physica (Utr.) 65, 163 (1973).

Hunten, D. M.

J. W. Chamberlain, D. M. Hunten, and J. E. Mack, J. Atm. Terr. Phys. 12, 153 (1958).

Ioli, N.

N. Ioli and F. Strumia, J. Opt. Soc. Am. 61, 1251 (1971).

Jarrett, S. M.

S. M. Jarrett and P. A. Franken, J. Opt. Soc. Am. 55, 1603 (1965).

Jennings, D. A.

D. A. Jennings and R. A. Keller, J. Am. Chem. Soc. 94, 9249 (1972).

Keller, R. A.

D. A. Jennings and R. A. Keller, J. Am. Chem. Soc. 94, 9249 (1972).

Kuhl, J.

J. Kuhl and G. Marowsky, Opt. Commun. 4, 125 (1971).

Mack, J. E.

J. W. Chamberlain, D. M. Hunten, and J. E. Mack, J. Atm. Terr. Phys. 12, 153 (1958).

Marowsky, G.

J. Kuhl and G. Marowsky, Opt. Commun. 4, 125 (1971).

Mitchell, A.

A. Mitchell and M. Zemansky, Resonance Radiation and Excited Atoms (Cambridge U. P., New York, 1971), pp. 92–106.

Nesmeyanov, A. N.

A. N. Nesmeyanov, Vapor Pressure of the Chemical Elements (Elsevier, Amsterdam, 1963), pp. 128–137.

Resnick, R.

T. M. Donahue, R. Resnick, and V. R. Stull, Phys. Rev. 104, 873 (1956).

Schulz, G.

G. Schulz and W. Stopp, Z. Phys. 210, 223 (1968).

Stopp, W.

G. Schulz and W. Stopp, Z. Phys. 210, 223 (1968).

Strumia, F.

N. Ioli and F. Strumia, J. Opt. Soc. Am. 61, 1251 (1971).

Stull, V. R.

T. M. Donahue, R. Resnick, and V. R. Stull, Phys. Rev. 104, 873 (1956).

van derHeide, J. A.

L. C. J. Baghuis, H. L. Hagedoorn, and J. A. van der Heide, in Proceedings of the Eleventh International Conference on Phenomena in Ionized Gases, 1973 (Czechoslovak Academy of Sciences, Prague, 1973), pp. 478 and 479.

Zemansky, M.

A. Mitchell and M. Zemansky, Resonance Radiation and Excited Atoms (Cambridge U. P., New York, 1971), pp. 92–106.

Other (11)

L. C. J. Baghuis and H. L. Hagedoorn, Physica (Utr.) 65, 163 (1973).

L. C. J. Baghuis, H. L. Hagedoorn, and J. A. van der Heide, in Proceedings of the Eleventh International Conference on Phenomena in Ionized Gases, 1973 (Czechoslovak Academy of Sciences, Prague, 1973), pp. 478 and 479.

S. M. Jarrett and P. A. Franken, J. Opt. Soc. Am. 55, 1603 (1965).

N. Ioli and F. Strumia, J. Opt. Soc. Am. 61, 1251 (1971).

J. W. Chamberlain, D. M. Hunten, and J. E. Mack, J. Atm. Terr. Phys. 12, 153 (1958).

T. M. Donahue, R. Resnick, and V. R. Stull, Phys. Rev. 104, 873 (1956).

J. Kuhl and G. Marowsky, Opt. Commun. 4, 125 (1971).

D. A. Jennings and R. A. Keller, J. Am. Chem. Soc. 94, 9249 (1972).

A. Mitchell and M. Zemansky, Resonance Radiation and Excited Atoms (Cambridge U. P., New York, 1971), pp. 92–106.

G. Schulz and W. Stopp, Z. Phys. 210, 223 (1968).

A. N. Nesmeyanov, Vapor Pressure of the Chemical Elements (Elsevier, Amsterdam, 1963), pp. 128–137.

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