Abstract

The spectrum of yttrium has been observed in a sliding spark discharge at peak currents up to 2000 A on the 10.7 m normal and grazing incidence vacuum spectrographs at NBS . From these observations, the group of 4<i>S</i><sup>2</sup>4<i>p</i><sup>4</sup>-4<i>s</i><sup>4</sup><i>p</i><sup>5</sup> transitions in YVI, which lie in the region 457–766 Å, has been identified and measured, thus yielding values for the 4 levels of the 4<i>s</i>4<i>p</i><sup>5</sup> configuration and revised values for the 5 levels of the 4<i>s</i><sup>2</sup>4<i>p</i><sup>4</sup> configuration. The energy parameters obtained from a least-squares fit to the observed levels are compared with Hartree-Fock calculations.

© 1976 Optical Society of America

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  1. M. S. Z. Chaghtai, Z. Ali, and S. Khatoon, J. Phys. B 6, 232 (1973).
  2. J. Reader, G. L. Epstein, and J. O. Ekberg, J. Opt. Soc. Am. 62, 273 (1972).
  3. C. J. Humphreys, Phys. Rev. 47, 712 (1935).
  4. J. E. Hansen and W. Persson, J. Opt. Soc. Am. 64, 696 (1974).
  5. J. Reader and G. L. Epstein, J. Opt. Soc. Am. 62, 619 (1972).
  6. C. Froese, Can. J. Phys. 41, 1895 (1963); and C. Froese-Fischer and M. Wilson, Argonne National Laboratory Report No. 7404 (1968).

Ali, Z.

M. S. Z. Chaghtai, Z. Ali, and S. Khatoon, J. Phys. B 6, 232 (1973).

Chaghtai, M. S. Z.

M. S. Z. Chaghtai, Z. Ali, and S. Khatoon, J. Phys. B 6, 232 (1973).

Ekberg, J. O.

J. Reader, G. L. Epstein, and J. O. Ekberg, J. Opt. Soc. Am. 62, 273 (1972).

Epstein, G. L.

J. Reader, G. L. Epstein, and J. O. Ekberg, J. Opt. Soc. Am. 62, 273 (1972).

J. Reader and G. L. Epstein, J. Opt. Soc. Am. 62, 619 (1972).

Froese, C.

C. Froese, Can. J. Phys. 41, 1895 (1963); and C. Froese-Fischer and M. Wilson, Argonne National Laboratory Report No. 7404 (1968).

Hansen, J. E.

J. E. Hansen and W. Persson, J. Opt. Soc. Am. 64, 696 (1974).

Humphreys, C. J.

C. J. Humphreys, Phys. Rev. 47, 712 (1935).

Khatoon, S.

M. S. Z. Chaghtai, Z. Ali, and S. Khatoon, J. Phys. B 6, 232 (1973).

Persson, W.

J. E. Hansen and W. Persson, J. Opt. Soc. Am. 64, 696 (1974).

Reader, J.

J. Reader and G. L. Epstein, J. Opt. Soc. Am. 62, 619 (1972).

J. Reader, G. L. Epstein, and J. O. Ekberg, J. Opt. Soc. Am. 62, 273 (1972).

Other (6)

M. S. Z. Chaghtai, Z. Ali, and S. Khatoon, J. Phys. B 6, 232 (1973).

J. Reader, G. L. Epstein, and J. O. Ekberg, J. Opt. Soc. Am. 62, 273 (1972).

C. J. Humphreys, Phys. Rev. 47, 712 (1935).

J. E. Hansen and W. Persson, J. Opt. Soc. Am. 64, 696 (1974).

J. Reader and G. L. Epstein, J. Opt. Soc. Am. 62, 619 (1972).

C. Froese, Can. J. Phys. 41, 1895 (1963); and C. Froese-Fischer and M. Wilson, Argonne National Laboratory Report No. 7404 (1968).

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