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 4s24p4–4s4p5 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 4s4p5 configuration and revised values for the 5 levels of the 4s24p4 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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References

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  1. M. S. Z. Chaghtai, Z. Ali, and S. Khatoon, J. Phys. B 6, 232 (1973).
    [Crossref]
  2. J. Reader, G. L. Epstein, and J. O. Ekberg, J. Opt. Soc. Am. 62, 273 (1972).
    [Crossref]
  3. C. J. Humphreys, Phys. Rev. 47, 712 (1935).
    [Crossref]
  4. J. E. Hansen and W. Persson, J. Opt. Soc. Am. 64, 696 (1974).
    [Crossref]
  5. J. Reader and G. L. Epstein, J. Opt. Soc. Am. 62, 619 (1972).
    [Crossref]
  6. C. Froese, Can. J. Phys. 41, 1895 (1963); and C. Froese-Fischer and M. Wilson, (1968).
    [Crossref]

1974 (1)

1973 (1)

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

1972 (2)

1963 (1)

C. Froese, Can. J. Phys. 41, 1895 (1963); and C. Froese-Fischer and M. Wilson, (1968).
[Crossref]

1935 (1)

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

Ali, Z.

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

Chaghtai, M. S. Z.

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

Ekberg, J. O.

Epstein, G. L.

Froese, C.

C. Froese, Can. J. Phys. 41, 1895 (1963); and C. Froese-Fischer and M. Wilson, (1968).
[Crossref]

Hansen, J. E.

Humphreys, C. J.

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

Khatoon, S.

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

Persson, W.

Reader, J.

Can. J. Phys. (1)

C. Froese, Can. J. Phys. 41, 1895 (1963); and C. Froese-Fischer and M. Wilson, (1968).
[Crossref]

J. Opt. Soc. Am. (3)

J. Phys. B (1)

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

Phys. Rev. (1)

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

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Tables (4)

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TABLE I Observed 4s24p4–4s4p5 transitions in the spectrum of Yvi. Symbol: p, perturbed by close line.

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TABLE II 4s24p4 and 4s4p5 energy levels of Y vi.

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TABLE III Calculated energy level values in cm−1 and percentage compositions for the 4s24p4 configuration of Y vi. Negative eigenvector components are preceded by a minus sign Mean error of level fit = 41 cm−1.

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TABLE IV Energy parameters in cm−1 for the 4s24p4 and 4s4p5 configurations of Y vi.