Abstract

The continuous atomic-absorption cross section of lithium and sodium vapors has been measured between 600 and 1000 Å using photoelectric techniques. Curves and tables are presented of the atomic-absorption cross section versus energy from their series limits to 600 Å. A comparison is made between these results and recent theoretical estimates. The conclusion is that theory and experiment are in poor agreement for sodium at photon energies above 7 eV.

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  1. R. D. Hudson, Phys. Rev. 135, A1212 (1964).
  2. R. D. Hudson and V. L. Carter, Phys. Rev. 137, A1648 (1965).
  3. R. W. Ditchburn and P. J. Jutsum, Nature 165, 723 (1950).
  4. R. W. Ditchburn, P. J. Jutsum and G. V. Marr, Proc. Roy. Soc. (London) A219, 89 (1953).
  5. G. V. Marr, Proc. Phys. Soc. (London) 81, 9 (1963).
  6. J. J. Hopfield, Astrophys. J. 72, 133 (1930).
  7. P. H. Metzger and G. R. Cook, J. Quant. Spectry. Radiative Transfer 4, 107 (1964).
  8. R. E. Huffman, J. C. Larrabee, and Y. Tanaka, Appl. Opt. 4, 1581 (1965).
  9. JANAF Tlerennocltemnicat Tables (The Dow Chemical Comi pany, Midland, Michigan, 1962).
  10. J. W. Cooper, Phys. Rev. 128, 681 (1962).
  11. A. H. Boyd, Planetary Space Sci. 12, 729 (1964).
  12. J. W. Sheldon, J. Appl. Phys. 37, 2928 (1966).
  13. A. Burgess and M. J. Seaton, Monthly Notices Roy. Astron. Soc. 120, 121 (1960).
  14. H. Beutler and R. Guggenheimer, Z. Physik 87, 188 (1934); 88, 25 (1934).
  15. H. Beutler, Z. Physik 91, 131 (1934).
  16. Preliminary measurementsin this laboratory of the (3p)6 4s2S1/2 → (3p)5 (4s)2 2P3/2 and (3p)6 4s2S½ → (3p)5 (4s)22p½ transitions at 662.38 Å and 653.31 Å, respectively, in potassium vapor, indicate peak absorption cross sections of the order of 10-15 cm2 and a total oscillator strength of 0.16.

Beutler, H.

H. Beutler, Z. Physik 91, 131 (1934).

H. Beutler and R. Guggenheimer, Z. Physik 87, 188 (1934); 88, 25 (1934).

Boyd, A. H.

A. H. Boyd, Planetary Space Sci. 12, 729 (1964).

Burgess, A.

A. Burgess and M. J. Seaton, Monthly Notices Roy. Astron. Soc. 120, 121 (1960).

Carter, V. L.

R. D. Hudson and V. L. Carter, Phys. Rev. 137, A1648 (1965).

Cook, G. R.

P. H. Metzger and G. R. Cook, J. Quant. Spectry. Radiative Transfer 4, 107 (1964).

Cooper, J. W.

J. W. Cooper, Phys. Rev. 128, 681 (1962).

Ditchburn, R. W.

R. W. Ditchburn and P. J. Jutsum, Nature 165, 723 (1950).

R. W. Ditchburn, P. J. Jutsum and G. V. Marr, Proc. Roy. Soc. (London) A219, 89 (1953).

Guggenheimer, K.

H. Beutler and R. Guggenheimer, Z. Physik 87, 188 (1934); 88, 25 (1934).

Hopfield, J. J.

J. J. Hopfield, Astrophys. J. 72, 133 (1930).

Hudson, R. D.

R. D. Hudson and V. L. Carter, Phys. Rev. 137, A1648 (1965).

R. D. Hudson, Phys. Rev. 135, A1212 (1964).

Huffman, R. E.

R. E. Huffman, J. C. Larrabee, and Y. Tanaka, Appl. Opt. 4, 1581 (1965).

Jutsum, P. J.

R. W. Ditchburn, P. J. Jutsum and G. V. Marr, Proc. Roy. Soc. (London) A219, 89 (1953).

R. W. Ditchburn and P. J. Jutsum, Nature 165, 723 (1950).

Larrabee, J. C.

R. E. Huffman, J. C. Larrabee, and Y. Tanaka, Appl. Opt. 4, 1581 (1965).

Marr, G. V.

G. V. Marr, Proc. Phys. Soc. (London) 81, 9 (1963).

R. W. Ditchburn, P. J. Jutsum and G. V. Marr, Proc. Roy. Soc. (London) A219, 89 (1953).

Metzger, P. H.

P. H. Metzger and G. R. Cook, J. Quant. Spectry. Radiative Transfer 4, 107 (1964).

Seaton, M. J.

A. Burgess and M. J. Seaton, Monthly Notices Roy. Astron. Soc. 120, 121 (1960).

Sheldon, J. W.

J. W. Sheldon, J. Appl. Phys. 37, 2928 (1966).

Tanaka, Y.

R. E. Huffman, J. C. Larrabee, and Y. Tanaka, Appl. Opt. 4, 1581 (1965).

Other (16)

R. D. Hudson, Phys. Rev. 135, A1212 (1964).

R. D. Hudson and V. L. Carter, Phys. Rev. 137, A1648 (1965).

R. W. Ditchburn and P. J. Jutsum, Nature 165, 723 (1950).

R. W. Ditchburn, P. J. Jutsum and G. V. Marr, Proc. Roy. Soc. (London) A219, 89 (1953).

G. V. Marr, Proc. Phys. Soc. (London) 81, 9 (1963).

J. J. Hopfield, Astrophys. J. 72, 133 (1930).

P. H. Metzger and G. R. Cook, J. Quant. Spectry. Radiative Transfer 4, 107 (1964).

R. E. Huffman, J. C. Larrabee, and Y. Tanaka, Appl. Opt. 4, 1581 (1965).

JANAF Tlerennocltemnicat Tables (The Dow Chemical Comi pany, Midland, Michigan, 1962).

J. W. Cooper, Phys. Rev. 128, 681 (1962).

A. H. Boyd, Planetary Space Sci. 12, 729 (1964).

J. W. Sheldon, J. Appl. Phys. 37, 2928 (1966).

A. Burgess and M. J. Seaton, Monthly Notices Roy. Astron. Soc. 120, 121 (1960).

H. Beutler and R. Guggenheimer, Z. Physik 87, 188 (1934); 88, 25 (1934).

H. Beutler, Z. Physik 91, 131 (1934).

Preliminary measurementsin this laboratory of the (3p)6 4s2S1/2 → (3p)5 (4s)2 2P3/2 and (3p)6 4s2S½ → (3p)5 (4s)22p½ transitions at 662.38 Å and 653.31 Å, respectively, in potassium vapor, indicate peak absorption cross sections of the order of 10-15 cm2 and a total oscillator strength of 0.16.

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