Abstract

The spectrum of barium was recorded in the 250–1240-Å region on a variety of spectrographs. The sources used were a conventional triggered spark and a laser-produced plasma. The spectrum of seven-times ionized barium was investigated. Eight of thirteen levels reported earlier were confirmed. In the present analysis we have established a total of 74 levels, 66 of them new, belonging to the 5s25p, 5s24f, 5p3, 5s5p5d, 5s26p, 5s25f, and 5s5p6s configurations in the odd-parity system and to the 5s5p2, 5s25d, 5s5p4f, and 5s26s configurations in the even-parity system. We carried out least-squares fitted and Hartree–Fock calculations to interpret the spectrum satisfactorily. One hundred thirty-nine lines have been classified in this spectrum, of which one hundred thirty are newly classified lines.

© 2001 Optical Society of America

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References

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  1. C. J. Sansonetti, J. Reader, A. Tauheed, and Y. N. Joshi, “Spectrum and energy levels of triply ionized barium (Ba IV),” J. Opt. Soc. Am. B 10, 7–12 (1993).
    [CrossRef]
  2. A. Tauheed and Y. N. Joshi, “Analysis of the 5s25p4, 5s5p5, 5s25p35d, and 5s25p36s configurations of four times ionized barium: Ba V,” J. Phys. B 28, 3753–3762 (1995).
    [CrossRef]
  3. A. Tauheed and Y. N. Joshi, “Analysis of the sixth spectrum of barium: Ba VI,” Phys. Scr. 49, 335–339 (1994).
    [CrossRef]
  4. A. Tauheed and Y. N. Joshi, “Analysis of the 5s25p2, 5s5p3, 5s25p5d, and 5s25p6s configurations Ba VII,” Phys. Scr. 46, 403–408 (1992).
    [CrossRef]
  5. R. Gayasov and Y. N. Joshi, “Transitions from the configurations involving 4f-electrons in Cs IX–La XI and Cs X– Ce XIV spectra,” J. Phys. B 31, L705–L709 (1998).
    [CrossRef]
  6. V. Kaufman and J. Sugar, “In I isoelectronic sequence wavelengths and energy levels of Xe VI through La IX,” J. Opt. Soc. Am. B 4, 1924–1926 (1987).
    [CrossRef]
  7. V. Kaufman and J. Sugar, “Cd I isoelectronic sequence: wavelengths and energy levels for Xe VII through Eu XV,” J. Opt. Soc. Am. B 4, 1919–1923 (1987).
    [CrossRef]
  8. R. D. Cowan, The Theory of Atomic Structure and Spectra (U. California Press, Berkeley, Calif., 1981) and Cowan Code programs provided to the authors by R. D. Cowan.
  9. A. Tauheed, A. F. Zafaran, and Y. N. Joshi, “Interpretation of the 5p3, 5s5p5d and 5s5p6s configurations of trebly ionized tellurium (Te IV),” J. Phys. B 32, 2917–2925 (1999).
    [CrossRef]
  10. A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “Analysis of the 5s25d, 5p3, 5s5p5d and 5s5p6s configurations of four-times ionized iodine: I IV,” J. Phys. B 31, 393–401 (1998).
    [CrossRef]
  11. R. Gayasov and Y. N. Joshi, “Revised and extended analysis of six-times ionized cesium: Cs VII,” Phys. Scr. 60, 312–320 (1999).
    [CrossRef]
  12. R. Gayasov and Y. N. Joshi, “Spectrum of La IX: an interesting example of configuration interaction,” J. Opt. Soc. Am. B 15, 2614–2619 (1998).
    [CrossRef]
  13. A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “The 5s25p–5s5p2 4P intercombination lines in the In I isoelectronic sequence from Sb III to La IX,” J. Phys. B 25, 561–564 (1992).
    [CrossRef]
  14. S. S. Churilov, A. N. Ryabtsev, and J. F. Wyart, “Identification of n=4, Δn=0 transitions in the spectra of nickle-like and zinc-like ions through tin,” Phys. Scr. 38, 326–336 (1988).
    [CrossRef]
  15. R. L. Kelly, “Atomic and ionic emission lines below 2000 Å—hydrogen through chromium,” J. Phys. Chem. Ref. Data 16, 1–649 (1987).
  16. V. I. Azarov, “Formal approach to the solutions of complex spectra identification problem,” Phys. Scr. 44, 528–538 (1993).
    [CrossRef]

1999 (2)

R. Gayasov and Y. N. Joshi, “Revised and extended analysis of six-times ionized cesium: Cs VII,” Phys. Scr. 60, 312–320 (1999).
[CrossRef]

A. Tauheed, A. F. Zafaran, and Y. N. Joshi, “Interpretation of the 5p3, 5s5p5d and 5s5p6s configurations of trebly ionized tellurium (Te IV),” J. Phys. B 32, 2917–2925 (1999).
[CrossRef]

1998 (3)

A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “Analysis of the 5s25d, 5p3, 5s5p5d and 5s5p6s configurations of four-times ionized iodine: I IV,” J. Phys. B 31, 393–401 (1998).
[CrossRef]

R. Gayasov and Y. N. Joshi, “Spectrum of La IX: an interesting example of configuration interaction,” J. Opt. Soc. Am. B 15, 2614–2619 (1998).
[CrossRef]

R. Gayasov and Y. N. Joshi, “Transitions from the configurations involving 4f-electrons in Cs IX–La XI and Cs X– Ce XIV spectra,” J. Phys. B 31, L705–L709 (1998).
[CrossRef]

1995 (1)

A. Tauheed and Y. N. Joshi, “Analysis of the 5s25p4, 5s5p5, 5s25p35d, and 5s25p36s configurations of four times ionized barium: Ba V,” J. Phys. B 28, 3753–3762 (1995).
[CrossRef]

1994 (1)

A. Tauheed and Y. N. Joshi, “Analysis of the sixth spectrum of barium: Ba VI,” Phys. Scr. 49, 335–339 (1994).
[CrossRef]

1993 (2)

C. J. Sansonetti, J. Reader, A. Tauheed, and Y. N. Joshi, “Spectrum and energy levels of triply ionized barium (Ba IV),” J. Opt. Soc. Am. B 10, 7–12 (1993).
[CrossRef]

V. I. Azarov, “Formal approach to the solutions of complex spectra identification problem,” Phys. Scr. 44, 528–538 (1993).
[CrossRef]

1992 (2)

A. Tauheed and Y. N. Joshi, “Analysis of the 5s25p2, 5s5p3, 5s25p5d, and 5s25p6s configurations Ba VII,” Phys. Scr. 46, 403–408 (1992).
[CrossRef]

A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “The 5s25p–5s5p2 4P intercombination lines in the In I isoelectronic sequence from Sb III to La IX,” J. Phys. B 25, 561–564 (1992).
[CrossRef]

1988 (1)

S. S. Churilov, A. N. Ryabtsev, and J. F. Wyart, “Identification of n=4, Δn=0 transitions in the spectra of nickle-like and zinc-like ions through tin,” Phys. Scr. 38, 326–336 (1988).
[CrossRef]

1987 (3)

Azarov, V. I.

V. I. Azarov, “Formal approach to the solutions of complex spectra identification problem,” Phys. Scr. 44, 528–538 (1993).
[CrossRef]

Churilov, S. S.

S. S. Churilov, A. N. Ryabtsev, and J. F. Wyart, “Identification of n=4, Δn=0 transitions in the spectra of nickle-like and zinc-like ions through tin,” Phys. Scr. 38, 326–336 (1988).
[CrossRef]

Gayasov, R.

R. Gayasov and Y. N. Joshi, “Revised and extended analysis of six-times ionized cesium: Cs VII,” Phys. Scr. 60, 312–320 (1999).
[CrossRef]

R. Gayasov and Y. N. Joshi, “Transitions from the configurations involving 4f-electrons in Cs IX–La XI and Cs X– Ce XIV spectra,” J. Phys. B 31, L705–L709 (1998).
[CrossRef]

R. Gayasov and Y. N. Joshi, “Spectrum of La IX: an interesting example of configuration interaction,” J. Opt. Soc. Am. B 15, 2614–2619 (1998).
[CrossRef]

Joshi, Y. N.

R. Gayasov and Y. N. Joshi, “Revised and extended analysis of six-times ionized cesium: Cs VII,” Phys. Scr. 60, 312–320 (1999).
[CrossRef]

A. Tauheed, A. F. Zafaran, and Y. N. Joshi, “Interpretation of the 5p3, 5s5p5d and 5s5p6s configurations of trebly ionized tellurium (Te IV),” J. Phys. B 32, 2917–2925 (1999).
[CrossRef]

A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “Analysis of the 5s25d, 5p3, 5s5p5d and 5s5p6s configurations of four-times ionized iodine: I IV,” J. Phys. B 31, 393–401 (1998).
[CrossRef]

R. Gayasov and Y. N. Joshi, “Transitions from the configurations involving 4f-electrons in Cs IX–La XI and Cs X– Ce XIV spectra,” J. Phys. B 31, L705–L709 (1998).
[CrossRef]

R. Gayasov and Y. N. Joshi, “Spectrum of La IX: an interesting example of configuration interaction,” J. Opt. Soc. Am. B 15, 2614–2619 (1998).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of the 5s25p4, 5s5p5, 5s25p35d, and 5s25p36s configurations of four times ionized barium: Ba V,” J. Phys. B 28, 3753–3762 (1995).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of the sixth spectrum of barium: Ba VI,” Phys. Scr. 49, 335–339 (1994).
[CrossRef]

C. J. Sansonetti, J. Reader, A. Tauheed, and Y. N. Joshi, “Spectrum and energy levels of triply ionized barium (Ba IV),” J. Opt. Soc. Am. B 10, 7–12 (1993).
[CrossRef]

A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “The 5s25p–5s5p2 4P intercombination lines in the In I isoelectronic sequence from Sb III to La IX,” J. Phys. B 25, 561–564 (1992).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of the 5s25p2, 5s5p3, 5s25p5d, and 5s25p6s configurations Ba VII,” Phys. Scr. 46, 403–408 (1992).
[CrossRef]

Kaufman, V.

Kelly, R. L.

R. L. Kelly, “Atomic and ionic emission lines below 2000 Å—hydrogen through chromium,” J. Phys. Chem. Ref. Data 16, 1–649 (1987).

Pinnington, E. H.

A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “Analysis of the 5s25d, 5p3, 5s5p5d and 5s5p6s configurations of four-times ionized iodine: I IV,” J. Phys. B 31, 393–401 (1998).
[CrossRef]

A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “The 5s25p–5s5p2 4P intercombination lines in the In I isoelectronic sequence from Sb III to La IX,” J. Phys. B 25, 561–564 (1992).
[CrossRef]

Reader, J.

Ryabtsev, A. N.

S. S. Churilov, A. N. Ryabtsev, and J. F. Wyart, “Identification of n=4, Δn=0 transitions in the spectra of nickle-like and zinc-like ions through tin,” Phys. Scr. 38, 326–336 (1988).
[CrossRef]

Sansonetti, C. J.

Sugar, J.

Tauheed, A.

A. Tauheed, A. F. Zafaran, and Y. N. Joshi, “Interpretation of the 5p3, 5s5p5d and 5s5p6s configurations of trebly ionized tellurium (Te IV),” J. Phys. B 32, 2917–2925 (1999).
[CrossRef]

A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “Analysis of the 5s25d, 5p3, 5s5p5d and 5s5p6s configurations of four-times ionized iodine: I IV,” J. Phys. B 31, 393–401 (1998).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of the 5s25p4, 5s5p5, 5s25p35d, and 5s25p36s configurations of four times ionized barium: Ba V,” J. Phys. B 28, 3753–3762 (1995).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of the sixth spectrum of barium: Ba VI,” Phys. Scr. 49, 335–339 (1994).
[CrossRef]

C. J. Sansonetti, J. Reader, A. Tauheed, and Y. N. Joshi, “Spectrum and energy levels of triply ionized barium (Ba IV),” J. Opt. Soc. Am. B 10, 7–12 (1993).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of the 5s25p2, 5s5p3, 5s25p5d, and 5s25p6s configurations Ba VII,” Phys. Scr. 46, 403–408 (1992).
[CrossRef]

A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “The 5s25p–5s5p2 4P intercombination lines in the In I isoelectronic sequence from Sb III to La IX,” J. Phys. B 25, 561–564 (1992).
[CrossRef]

Wyart, J. F.

S. S. Churilov, A. N. Ryabtsev, and J. F. Wyart, “Identification of n=4, Δn=0 transitions in the spectra of nickle-like and zinc-like ions through tin,” Phys. Scr. 38, 326–336 (1988).
[CrossRef]

Zafaran, A. F.

A. Tauheed, A. F. Zafaran, and Y. N. Joshi, “Interpretation of the 5p3, 5s5p5d and 5s5p6s configurations of trebly ionized tellurium (Te IV),” J. Phys. B 32, 2917–2925 (1999).
[CrossRef]

J. Opt. Soc. Am. B (4)

J. Phys. B (5)

A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “The 5s25p–5s5p2 4P intercombination lines in the In I isoelectronic sequence from Sb III to La IX,” J. Phys. B 25, 561–564 (1992).
[CrossRef]

R. Gayasov and Y. N. Joshi, “Transitions from the configurations involving 4f-electrons in Cs IX–La XI and Cs X– Ce XIV spectra,” J. Phys. B 31, L705–L709 (1998).
[CrossRef]

A. Tauheed, A. F. Zafaran, and Y. N. Joshi, “Interpretation of the 5p3, 5s5p5d and 5s5p6s configurations of trebly ionized tellurium (Te IV),” J. Phys. B 32, 2917–2925 (1999).
[CrossRef]

A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “Analysis of the 5s25d, 5p3, 5s5p5d and 5s5p6s configurations of four-times ionized iodine: I IV,” J. Phys. B 31, 393–401 (1998).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of the 5s25p4, 5s5p5, 5s25p35d, and 5s25p36s configurations of four times ionized barium: Ba V,” J. Phys. B 28, 3753–3762 (1995).
[CrossRef]

J. Phys. Chem. Ref. Data (1)

R. L. Kelly, “Atomic and ionic emission lines below 2000 Å—hydrogen through chromium,” J. Phys. Chem. Ref. Data 16, 1–649 (1987).

Phys. Scr. (5)

V. I. Azarov, “Formal approach to the solutions of complex spectra identification problem,” Phys. Scr. 44, 528–538 (1993).
[CrossRef]

S. S. Churilov, A. N. Ryabtsev, and J. F. Wyart, “Identification of n=4, Δn=0 transitions in the spectra of nickle-like and zinc-like ions through tin,” Phys. Scr. 38, 326–336 (1988).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of the sixth spectrum of barium: Ba VI,” Phys. Scr. 49, 335–339 (1994).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of the 5s25p2, 5s5p3, 5s25p5d, and 5s25p6s configurations Ba VII,” Phys. Scr. 46, 403–408 (1992).
[CrossRef]

R. Gayasov and Y. N. Joshi, “Revised and extended analysis of six-times ionized cesium: Cs VII,” Phys. Scr. 60, 312–320 (1999).
[CrossRef]

Other (1)

R. D. Cowan, The Theory of Atomic Structure and Spectra (U. California Press, Berkeley, Calif., 1981) and Cowan Code programs provided to the authors by R. D. Cowan.

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Tables (3)

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Table 1 Classified Spectral Lines in the Ba viii Iona

Tables Icon

Table 2 Energy Levels (cm-1) of the Odd- and Even-Parity Configurations in the Ba viii Spectruma

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Table 3 LSF and HF Energy Parameters (cm-1) of Odd and Even Configurations of Ba viii

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