Abstract

<p>It has been observed that a dc, condensed, self-triggered helium discharge at high pressures (400—800 mm Hg) produces a strong continuous emission spectrum in the 1050–4000 Å region, with a broad intensity maximum around 2500 Å. In the same discharge, a continuum-like feature appeared in the 500–600 Å region because of the merging of the very greatly broadened resonance series lines with additional diffuse bands between the successive lines of the series. A suggestion is made concerning the origin of the observed continuum in the 1050–4000 Å region. A detailed description of experimental conditions producing the continuum is also presented.</p><p>A short description is also given of spectra of argon and xenon, which show additional continua similar to those of helium mentioned above.</p>

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  1. T. Lyman, Astrophys. J. 60, 1 (1924); Science 50, 481 (1919).
  2. K. T. Compton and J. C. Boyce, J. Franklin Inst. 205, 497 (1928).
  3. T. Suga, Sci. Papers Inst. Phys. Chem. Research (Tokyo) 34, 16 (1937).
  4. P. G. Kruger, Phys. Rev. 36, 855 (1930).
  5. J. L. Nickerson, Phys. Rev. 47, 707 (1935).
  6. J. J. Hopfield, Astrophys. J. 72, 133 (1930).
  7. Y. Tanaka, Sci. Papers Inst. Phys. Chem. Research (Tokyo) 39, 465 (1942).
  8. Y. Tanaka, A. S. Jursa, and F. J. LeBlanc, J. Opt. Soc. Am. 48, 304 (1958).
  9. R. E. Huffman, W. W. Hunt, Y. Tanaka, and R. L. Novack, J. Opt. Soc. Am. 51, 693 (1961).
  10. R. E. Huffman, W. W. Hunt, Y. Tanaka, J. C. Larrabee, and R. L. Novack, "GRD Research Note No. 61," (Air Force Cambridge Research Laboratories, Bedford, Mass., 1961).
  11. R. E. Huffman, Y. Tanaka, J. C. Larrabee, and R. L. Novack, Proceedings of the Fifth International Conference on Ionization Phenomena in Gases, Munich, 1961 (North-Holland Publishing Company, Amsterdam, 1961).
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  13. G. Herzberg, Spectra of Diatomic Molecules (D. Van Nostrand Company, Inc., Princeton, New Jersey, 1950), p. 536.
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  16. H. S. W. Massey and E. H. S. Burhop, Electronic and Ionic Impact Phenomena (Clarendon Press, Oxford, 1952), p. 648
  17. R. A. Johnson, B. L. McClure, and R. B. Holt, Phys. Rev. 80, 376 (1950).
  18. J. M. Anderson, Proceedings of the Fifth International Conference on Ionization Phenomena in Gases, Munich, 1961 (North-Holland Publishing Company, Amsterdam 1961), p. 621.
  19. W. Weizel, Phys. Rev. 38, 642 (1931).

Anderson, J. M.

J. M. Anderson, Proceedings of the Fifth International Conference on Ionization Phenomena in Gases, Munich, 1961 (North-Holland Publishing Company, Amsterdam 1961), p. 621.

Boyce, J. C.

K. T. Compton and J. C. Boyce, J. Franklin Inst. 205, 497 (1928).

Burhop, E. H. S.

H. S. W. Massey and E. H. S. Burhop, Electronic and Ionic Impact Phenomena (Clarendon Press, Oxford, 1952), p. 648

Compton, K. T.

K. T. Compton and J. C. Boyce, J. Franklin Inst. 205, 497 (1928).

Gaydon, A. G.

R. W. B. Pearse and A. G. Gaydon, The Identification of Molecular Spectra (Chapman and Hall, Ltd., London, 1950), 2nd ed., revised, p. 140.

Herzberg, G.

G. Herzberg, Spectra of Diatomic Molecules (D. Van Nostrand Company, Inc., Princeton, New Jersey, 1950), p. 536.

Hinteregger, H. E.

H. E. Hinteregger, Vistas in Astronautics, edited by M. Alperin and M. Stern (Pergamon Press, New York, 1958), p. 146.

Holt, R. B.

R. A. Johnson, B. L. McClure, and R. B. Holt, Phys. Rev. 80, 376 (1950).

Hopfield, J. J.

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

Huffman, R. E.

R. E. Huffman, W. W. Hunt, Y. Tanaka, and R. L. Novack, J. Opt. Soc. Am. 51, 693 (1961).

R. E. Huffman, W. W. Hunt, Y. Tanaka, J. C. Larrabee, and R. L. Novack, "GRD Research Note No. 61," (Air Force Cambridge Research Laboratories, Bedford, Mass., 1961).

R. E. Huffman, Y. Tanaka, J. C. Larrabee, and R. L. Novack, Proceedings of the Fifth International Conference on Ionization Phenomena in Gases, Munich, 1961 (North-Holland Publishing Company, Amsterdam, 1961).

Hunt, W. W.

R. E. Huffman, W. W. Hunt, Y. Tanaka, J. C. Larrabee, and R. L. Novack, "GRD Research Note No. 61," (Air Force Cambridge Research Laboratories, Bedford, Mass., 1961).

R. E. Huffman, W. W. Hunt, Y. Tanaka, and R. L. Novack, J. Opt. Soc. Am. 51, 693 (1961).

Johnson, R. A.

R. A. Johnson, B. L. McClure, and R. B. Holt, Phys. Rev. 80, 376 (1950).

Jursa, A. S.

Y. Tanaka, A. S. Jursa, and F. J. LeBlanc, J. Opt. Soc. Am. 48, 304 (1958).

Kruger, P. G.

P. G. Kruger, Phys. Rev. 36, 855 (1930).

Larrabee, J. C.

R. E. Huffman, W. W. Hunt, Y. Tanaka, J. C. Larrabee, and R. L. Novack, "GRD Research Note No. 61," (Air Force Cambridge Research Laboratories, Bedford, Mass., 1961).

R. E. Huffman, Y. Tanaka, J. C. Larrabee, and R. L. Novack, Proceedings of the Fifth International Conference on Ionization Phenomena in Gases, Munich, 1961 (North-Holland Publishing Company, Amsterdam, 1961).

LeBlanc, F. J.

Y. Tanaka, A. S. Jursa, and F. J. LeBlanc, J. Opt. Soc. Am. 48, 304 (1958).

Lyman, T.

T. Lyman, Astrophys. J. 60, 1 (1924); Science 50, 481 (1919).

Massey, H. S. W.

H. S. W. Massey and E. H. S. Burhop, Electronic and Ionic Impact Phenomena (Clarendon Press, Oxford, 1952), p. 648

McClure, B. L.

R. A. Johnson, B. L. McClure, and R. B. Holt, Phys. Rev. 80, 376 (1950).

Nickerson, J. L.

J. L. Nickerson, Phys. Rev. 47, 707 (1935).

Novack, R. L.

R. E. Huffman, W. W. Hunt, Y. Tanaka, J. C. Larrabee, and R. L. Novack, "GRD Research Note No. 61," (Air Force Cambridge Research Laboratories, Bedford, Mass., 1961).

R. E. Huffman, Y. Tanaka, J. C. Larrabee, and R. L. Novack, Proceedings of the Fifth International Conference on Ionization Phenomena in Gases, Munich, 1961 (North-Holland Publishing Company, Amsterdam, 1961).

R. E. Huffman, W. W. Hunt, Y. Tanaka, and R. L. Novack, J. Opt. Soc. Am. 51, 693 (1961).

Pearse, R. W. B.

R. W. B. Pearse and A. G. Gaydon, The Identification of Molecular Spectra (Chapman and Hall, Ltd., London, 1950), 2nd ed., revised, p. 140.

Suga, T.

T. Suga, Sci. Papers Inst. Phys. Chem. Research (Tokyo) 34, 16 (1937).

Tanaka, Y.

Y. Tanaka, Sci. Papers Inst. Phys. Chem. Research (Tokyo) 39, 465 (1942).

Y. Tanaka, A. S. Jursa, and F. J. LeBlanc, J. Opt. Soc. Am. 48, 304 (1958).

R. E. Huffman, W. W. Hunt, Y. Tanaka, J. C. Larrabee, and R. L. Novack, "GRD Research Note No. 61," (Air Force Cambridge Research Laboratories, Bedford, Mass., 1961).

R. E. Huffman, W. W. Hunt, Y. Tanaka, and R. L. Novack, J. Opt. Soc. Am. 51, 693 (1961).

R. E. Huffman, Y. Tanaka, J. C. Larrabee, and R. L. Novack, Proceedings of the Fifth International Conference on Ionization Phenomena in Gases, Munich, 1961 (North-Holland Publishing Company, Amsterdam, 1961).

Y. Tanaka, J. Opt. Soc. Am. 45, 710 (1955); Y. Tanaka and M. Zelikoff, ibid. 44, 254 (1954); P. G. Wilkinson and Y. Tanaka, ibid. 45, 344 (1955); P. G. Wilkinson, ibid. 45, 1044 (1955).

Weizel, W.

W. Weizel, Phys. Rev. 38, 642 (1931).

Other (19)

T. Lyman, Astrophys. J. 60, 1 (1924); Science 50, 481 (1919).

K. T. Compton and J. C. Boyce, J. Franklin Inst. 205, 497 (1928).

T. Suga, Sci. Papers Inst. Phys. Chem. Research (Tokyo) 34, 16 (1937).

P. G. Kruger, Phys. Rev. 36, 855 (1930).

J. L. Nickerson, Phys. Rev. 47, 707 (1935).

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

Y. Tanaka, Sci. Papers Inst. Phys. Chem. Research (Tokyo) 39, 465 (1942).

Y. Tanaka, A. S. Jursa, and F. J. LeBlanc, J. Opt. Soc. Am. 48, 304 (1958).

R. E. Huffman, W. W. Hunt, Y. Tanaka, and R. L. Novack, J. Opt. Soc. Am. 51, 693 (1961).

R. E. Huffman, W. W. Hunt, Y. Tanaka, J. C. Larrabee, and R. L. Novack, "GRD Research Note No. 61," (Air Force Cambridge Research Laboratories, Bedford, Mass., 1961).

R. E. Huffman, Y. Tanaka, J. C. Larrabee, and R. L. Novack, Proceedings of the Fifth International Conference on Ionization Phenomena in Gases, Munich, 1961 (North-Holland Publishing Company, Amsterdam, 1961).

H. E. Hinteregger, Vistas in Astronautics, edited by M. Alperin and M. Stern (Pergamon Press, New York, 1958), p. 146.

G. Herzberg, Spectra of Diatomic Molecules (D. Van Nostrand Company, Inc., Princeton, New Jersey, 1950), p. 536.

R. W. B. Pearse and A. G. Gaydon, The Identification of Molecular Spectra (Chapman and Hall, Ltd., London, 1950), 2nd ed., revised, p. 140.

Y. Tanaka, J. Opt. Soc. Am. 45, 710 (1955); Y. Tanaka and M. Zelikoff, ibid. 44, 254 (1954); P. G. Wilkinson and Y. Tanaka, ibid. 45, 344 (1955); P. G. Wilkinson, ibid. 45, 1044 (1955).

H. S. W. Massey and E. H. S. Burhop, Electronic and Ionic Impact Phenomena (Clarendon Press, Oxford, 1952), p. 648

R. A. Johnson, B. L. McClure, and R. B. Holt, Phys. Rev. 80, 376 (1950).

J. M. Anderson, Proceedings of the Fifth International Conference on Ionization Phenomena in Gases, Munich, 1961 (North-Holland Publishing Company, Amsterdam 1961), p. 621.

W. Weizel, Phys. Rev. 38, 642 (1931).

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