Abstract

Time-resolution techniques have been used to observe self-reversal of iron lines as a function of time. The spectrum of iron was excited with an electronically regulated ac arc source controlled to a high precision in time at currents up to 200 A. Time resolution was achieved with the aid of a disk, having an Archimedes spiral slot, rotating in front of the silt of a 2-m Ebert spectrograph. In the present spectral region, two types of self-reversed iron lines could be easily distinguished for transitions terminating on levels above the ground state. For lines terminating on the <i>a<sup>5</sup>F</i> levels, the width of the self-absorbed core is greatest at the end of the discharge. For lines terminating on levels above <i>a</i><sup>5</sup><i>F</i>, the self-reversed core either disappears or becomes very narrow at the end of the discharge.

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  1. H. M. Crosswhite, Spectrochim. Acta 4, 122 (1950–52).
  2. G. H. Dieke and H. M. Crosswhite, J. Opt. Soc. Am. 33, 425 (1943).
  3. E. S. Hodge, Soc. Appl. Spectry. Bull. 5, 4 (1951).
  4. J. K. Hurwitz and J. Convey, J. Opt. Soc. Am. 42, 24 (1952).
  5. E. F. Worden, R. G. Gutmacher, and J. G. Conway, Appl. Opt. 2, 707 (1963).
  6. L. H. Ahrens and S. R. Taylor, Spectrochemical Analysis (Addison Wesley Publ. Co., Inc., Reading, Mass., 1961), second ed.
  7. R. D. Cowan and G. H. Dieke, Rev. Mod. Phys. 20, 418 (1948).
  8. J. Sugar, J. Res. Natl. Bur. Std. (U. S.) 66A, 321 (1962).
  9. D. W. Steinhaus, H. M. Crosswhite, and G. H. Dieke, J. Opt. Soc. Am. 43, 257 (1953).
  10. Á. Bardócz, Appl. Spectry. 11, 167 (1959).
  11. Á. Bardócz, Rev. Univ. Mines 15, 344 (1959).
  12. Á. Bardócz, Spectrochim. Acta 7, 238 (1955).
  13. Á. Bardócz, Spectrochim. Acta 8, 152 (1956).
  14. H. N. Russell and C. E. Moore, Trans. Am. Phys. Soc. 34, 113 (1944).

Ahrens, L. H.

L. H. Ahrens and S. R. Taylor, Spectrochemical Analysis (Addison Wesley Publ. Co., Inc., Reading, Mass., 1961), second ed.

Bardócz, Á.

Á. Bardócz, Spectrochim. Acta 8, 152 (1956).

Á. Bardócz, Spectrochim. Acta 7, 238 (1955).

Á. Bardócz, Appl. Spectry. 11, 167 (1959).

Á. Bardócz, Rev. Univ. Mines 15, 344 (1959).

Convey, J.

J. K. Hurwitz and J. Convey, J. Opt. Soc. Am. 42, 24 (1952).

Conway, J. G.

E. F. Worden, R. G. Gutmacher, and J. G. Conway, Appl. Opt. 2, 707 (1963).

Cowan, R. D.

R. D. Cowan and G. H. Dieke, Rev. Mod. Phys. 20, 418 (1948).

Crosswhite, H. M.

H. M. Crosswhite, Spectrochim. Acta 4, 122 (1950–52).

D. W. Steinhaus, H. M. Crosswhite, and G. H. Dieke, J. Opt. Soc. Am. 43, 257 (1953).

G. H. Dieke and H. M. Crosswhite, J. Opt. Soc. Am. 33, 425 (1943).

Dieke, G. H.

G. H. Dieke and H. M. Crosswhite, J. Opt. Soc. Am. 33, 425 (1943).

D. W. Steinhaus, H. M. Crosswhite, and G. H. Dieke, J. Opt. Soc. Am. 43, 257 (1953).

R. D. Cowan and G. H. Dieke, Rev. Mod. Phys. 20, 418 (1948).

Gutmacher, R. G.

E. F. Worden, R. G. Gutmacher, and J. G. Conway, Appl. Opt. 2, 707 (1963).

Hodge, E. S.

E. S. Hodge, Soc. Appl. Spectry. Bull. 5, 4 (1951).

Hurwitz, J. K.

J. K. Hurwitz and J. Convey, J. Opt. Soc. Am. 42, 24 (1952).

Moore, C. E.

H. N. Russell and C. E. Moore, Trans. Am. Phys. Soc. 34, 113 (1944).

Russell, H. N.

H. N. Russell and C. E. Moore, Trans. Am. Phys. Soc. 34, 113 (1944).

Steinhaus, D. W.

D. W. Steinhaus, H. M. Crosswhite, and G. H. Dieke, J. Opt. Soc. Am. 43, 257 (1953).

Sugar, J.

J. Sugar, J. Res. Natl. Bur. Std. (U. S.) 66A, 321 (1962).

Taylor, S. R.

L. H. Ahrens and S. R. Taylor, Spectrochemical Analysis (Addison Wesley Publ. Co., Inc., Reading, Mass., 1961), second ed.

Worden, E. F.

E. F. Worden, R. G. Gutmacher, and J. G. Conway, Appl. Opt. 2, 707 (1963).

Other (14)

H. M. Crosswhite, Spectrochim. Acta 4, 122 (1950–52).

G. H. Dieke and H. M. Crosswhite, J. Opt. Soc. Am. 33, 425 (1943).

E. S. Hodge, Soc. Appl. Spectry. Bull. 5, 4 (1951).

J. K. Hurwitz and J. Convey, J. Opt. Soc. Am. 42, 24 (1952).

E. F. Worden, R. G. Gutmacher, and J. G. Conway, Appl. Opt. 2, 707 (1963).

L. H. Ahrens and S. R. Taylor, Spectrochemical Analysis (Addison Wesley Publ. Co., Inc., Reading, Mass., 1961), second ed.

R. D. Cowan and G. H. Dieke, Rev. Mod. Phys. 20, 418 (1948).

J. Sugar, J. Res. Natl. Bur. Std. (U. S.) 66A, 321 (1962).

D. W. Steinhaus, H. M. Crosswhite, and G. H. Dieke, J. Opt. Soc. Am. 43, 257 (1953).

Á. Bardócz, Appl. Spectry. 11, 167 (1959).

Á. Bardócz, Rev. Univ. Mines 15, 344 (1959).

Á. Bardócz, Spectrochim. Acta 7, 238 (1955).

Á. Bardócz, Spectrochim. Acta 8, 152 (1956).

H. N. Russell and C. E. Moore, Trans. Am. Phys. Soc. 34, 113 (1944).

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