Abstract

Some effects in the spectra of individual sparks between copper electrodes electroplated with thin deposits of silver were studied with the aid of a time-resolving spectrograph. The initial phase of the discharge is characterized by short-lived broadened lines of N ii and O ii, plus an intense continuum. The line spectrum is predominantly that of Ag ii with but a few lines of Ag i present. All of the high-level lines of Ag ii, and only these lines, are initially asymmetrically broadened and shifted to the red, but return to their normal wavelength positions after 6–9 µsec; while the low-level lines are characterized by self-reversal and associated continuum. The strong similarity to the spectrum of exploding Ag wire indicates that the same mechanism is operative in both. These effects are explained in terms of a Stark effect induced by the fields of neighboring electrons and ions.

© 1955 Optical Society of America

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References

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  1. Cady, Cassen, and Blitzer, Phys. Rev. 72, 159 (1947).
  2. L. Blitzer and W. M. Cady, J. Opt. Soc. Am. 41, 440 (1951); also references.
    [CrossRef] [PubMed]
  3. W. M. Cady and G. Gordon, J. Opt. Soc. Am. 39, 368 (1949).
    [CrossRef]
  4. J. A. Anderson, Astrophys. J. 51, 37 (1920); J. A. Anderson and S. Smith, Astrophys. J. 64, 295 (1926).
    [CrossRef]
  5. A. G. Shenstone, Phys. Rev. 31, 317 (1928); W. P. Gilbert, Phys. Rev. 47, 847 (1935).
    [CrossRef]
  6. In accordance with the recommendation of the Joint Commission for Spectroscopy [J. Opt. Soc. Am. 43, 410 (1953)] the wave-number unit cm−1 is abbreviated K(=kayser) in Figs. 1 and 3.
  7. G. Glaser, Optik 7, 33 (1950).
  8. O. Th. Hahn and W. Finkelnburg, Z. Physik 122, 37 (1944); H. N. Olsen and W. S. Huxford, Phys. Rev. 87, 922 (1952); Fowler, Atkinson, and Marks, Phys. Rev. 87, 966 (1952).
    [CrossRef]
  9. E. U. Condon and G. H. Shortley, The Theory of Atomic Spectra (Cambridge University Press, Cambridge, England, 1951).

1953 (1)

1951 (1)

1950 (1)

G. Glaser, Optik 7, 33 (1950).

1949 (1)

1947 (1)

Cady, Cassen, and Blitzer, Phys. Rev. 72, 159 (1947).

1944 (1)

O. Th. Hahn and W. Finkelnburg, Z. Physik 122, 37 (1944); H. N. Olsen and W. S. Huxford, Phys. Rev. 87, 922 (1952); Fowler, Atkinson, and Marks, Phys. Rev. 87, 966 (1952).
[CrossRef]

1928 (1)

A. G. Shenstone, Phys. Rev. 31, 317 (1928); W. P. Gilbert, Phys. Rev. 47, 847 (1935).
[CrossRef]

1920 (1)

J. A. Anderson, Astrophys. J. 51, 37 (1920); J. A. Anderson and S. Smith, Astrophys. J. 64, 295 (1926).
[CrossRef]

Anderson, J. A.

J. A. Anderson, Astrophys. J. 51, 37 (1920); J. A. Anderson and S. Smith, Astrophys. J. 64, 295 (1926).
[CrossRef]

Blitzer,

Cady, Cassen, and Blitzer, Phys. Rev. 72, 159 (1947).

Blitzer, L.

Cady,

Cady, Cassen, and Blitzer, Phys. Rev. 72, 159 (1947).

Cady, W. M.

Cassen,

Cady, Cassen, and Blitzer, Phys. Rev. 72, 159 (1947).

Condon, E. U.

E. U. Condon and G. H. Shortley, The Theory of Atomic Spectra (Cambridge University Press, Cambridge, England, 1951).

Finkelnburg, W.

O. Th. Hahn and W. Finkelnburg, Z. Physik 122, 37 (1944); H. N. Olsen and W. S. Huxford, Phys. Rev. 87, 922 (1952); Fowler, Atkinson, and Marks, Phys. Rev. 87, 966 (1952).
[CrossRef]

Glaser, G.

G. Glaser, Optik 7, 33 (1950).

Gordon, G.

Hahn, O. Th.

O. Th. Hahn and W. Finkelnburg, Z. Physik 122, 37 (1944); H. N. Olsen and W. S. Huxford, Phys. Rev. 87, 922 (1952); Fowler, Atkinson, and Marks, Phys. Rev. 87, 966 (1952).
[CrossRef]

Shenstone, A. G.

A. G. Shenstone, Phys. Rev. 31, 317 (1928); W. P. Gilbert, Phys. Rev. 47, 847 (1935).
[CrossRef]

Shortley, G. H.

E. U. Condon and G. H. Shortley, The Theory of Atomic Spectra (Cambridge University Press, Cambridge, England, 1951).

Astrophys. J. (1)

J. A. Anderson, Astrophys. J. 51, 37 (1920); J. A. Anderson and S. Smith, Astrophys. J. 64, 295 (1926).
[CrossRef]

J. Opt. Soc. Am. (3)

Optik (1)

G. Glaser, Optik 7, 33 (1950).

Phys. Rev. (2)

A. G. Shenstone, Phys. Rev. 31, 317 (1928); W. P. Gilbert, Phys. Rev. 47, 847 (1935).
[CrossRef]

Cady, Cassen, and Blitzer, Phys. Rev. 72, 159 (1947).

Z. Physik (1)

O. Th. Hahn and W. Finkelnburg, Z. Physik 122, 37 (1944); H. N. Olsen and W. S. Huxford, Phys. Rev. 87, 922 (1952); Fowler, Atkinson, and Marks, Phys. Rev. 87, 966 (1952).
[CrossRef]

Other (1)

E. U. Condon and G. H. Shortley, The Theory of Atomic Spectra (Cambridge University Press, Cambridge, England, 1951).

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Figures (5)

Fig. 1
Fig. 1

Line shift, half-width and intensity of λ2756 as functions of time during discharge. Lower figure shows the discharge current.

Fig. 2
Fig. 2

Comparison of time-resolved spectra of condensed spark between silver-plated copper electrodes (“Ag plate”), exploded Ag foil, exploded Ag wire, and spark between ordinary silver rods, in region of some Ag ii lines. Identical 5 μfd, 6000-volt discharges in each case.

Fig. 3
Fig. 3

Term values and transitions for some lines of Ag ii. The ionization limit, 4 d 9 D 2 1 2 of Ag iii, is at 173 274.0 K(kayser).

Fig. 4
Fig. 4

Line intensity profiles for some lines of Ag ii at microsecond time intervals during the discharge between electroplated electrodes. Note shift of zero of intensity for each time profile.

Fig. 5
Fig. 5

Line intensity profiles for some lines of Ag ii at microsecond time intervals during the discharge between electroplated electrodes. Note shift of zero of intensity for each time profile.