Abstract

Mean lives of four electronically excited atomic levels in Ar I have been determined using a method of delayed coincidence. The measured values of the mean lives of the 2p1 through 2p4 (Paschen notation) levels in neutral argon determined from transitions with associated wavelengths extending from 6677 to 7147 Å are as follows: 2p1, 21±2 nsec; 2p2, 25±1 nsec; 2P3, 26±1 nsec, and 2p4, 31±2 nsec. The lifetimes were estimated to contain systematic errors varying from 5% to 15% and are presented in comparison With results of other workers.

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  1. W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic Transition Probabilities (U. S. Government Printing Office, Washington, D. C., 1966), NSRDS-NBS 4, Vol. 1.
  2. J. Z. Klose, in Report of thze Conference on Electronic Excitation of an Atomic Vapor-Application to Spectroscopy, Grenoble, France, 23–25 May, 1966 (Centre National de la Recherche Scientifique, Paris, 1967), p. 191.
  3. J. Z. Klose, Phys. Rev. 141, 181 (1966).
  4. D. R. Bates and A. Damgaard, Phil. Trans. Roy. Soc. (London) A242, 101 (1949).
  5. T. Holstein, Phys. Rev. 72, 1212 (1947).
  6. T. Holstein, Phys. Rev. 83, 1159 (1951).
  7. References not otherwise given to authors cited in this paragraph are given in footnotes to Table 1.
  8. Hans R. Griem, Plasma Spectroscopy (McGraw-Hill Book Company, New York, 1964), 15, p. 321.

Bates, D. R.

D. R. Bates and A. Damgaard, Phil. Trans. Roy. Soc. (London) A242, 101 (1949).

Damgaard, A.

D. R. Bates and A. Damgaard, Phil. Trans. Roy. Soc. (London) A242, 101 (1949).

Glennon, B. M.

W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic Transition Probabilities (U. S. Government Printing Office, Washington, D. C., 1966), NSRDS-NBS 4, Vol. 1.

Griem, Hans R.

Hans R. Griem, Plasma Spectroscopy (McGraw-Hill Book Company, New York, 1964), 15, p. 321.

Holstein, T.

T. Holstein, Phys. Rev. 72, 1212 (1947).

T. Holstein, Phys. Rev. 83, 1159 (1951).

Klose, J. Z.

J. Z. Klose, Phys. Rev. 141, 181 (1966).

J. Z. Klose, in Report of thze Conference on Electronic Excitation of an Atomic Vapor-Application to Spectroscopy, Grenoble, France, 23–25 May, 1966 (Centre National de la Recherche Scientifique, Paris, 1967), p. 191.

Smith, M. W.

W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic Transition Probabilities (U. S. Government Printing Office, Washington, D. C., 1966), NSRDS-NBS 4, Vol. 1.

Wiese, W. L.

W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic Transition Probabilities (U. S. Government Printing Office, Washington, D. C., 1966), NSRDS-NBS 4, Vol. 1.

Other (8)

W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic Transition Probabilities (U. S. Government Printing Office, Washington, D. C., 1966), NSRDS-NBS 4, Vol. 1.

J. Z. Klose, in Report of thze Conference on Electronic Excitation of an Atomic Vapor-Application to Spectroscopy, Grenoble, France, 23–25 May, 1966 (Centre National de la Recherche Scientifique, Paris, 1967), p. 191.

J. Z. Klose, Phys. Rev. 141, 181 (1966).

D. R. Bates and A. Damgaard, Phil. Trans. Roy. Soc. (London) A242, 101 (1949).

T. Holstein, Phys. Rev. 72, 1212 (1947).

T. Holstein, Phys. Rev. 83, 1159 (1951).

References not otherwise given to authors cited in this paragraph are given in footnotes to Table 1.

Hans R. Griem, Plasma Spectroscopy (McGraw-Hill Book Company, New York, 1964), 15, p. 321.

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