Abstract

The spectrum of cesium was recorded in the 300–1240-Å region on a 3-m normal-incidence spectrograph and in the 100–300-Å region on a 10.7-m grazing-incidence spectrograph. The earlier analysis of Cs viii by Kaufman and Sugar [J. Opt. Soc. Am. B 4, 1919 (1987)] was confirmed, except for the two levels 5s5d 1D2 and 4d95s24f 1P1, and all other, earlier level values were revised. In addition, 12 levels of the 5p4f, the missing levels in the earlier-analyzed 5p2 1S0 and 5s6s 1S0, and all levels of the 5s4f, 5s5f and 11 of the 12 levels of the 5p5d configurations of the odd-parity configurations have been located. The Hartree–Fock calculations with relativistic corrections and least-squares-fitting calculations were carried out, which helped in the satisfactory interpretation of the spectrum. One hundred ten lines are now classified in this spectrum, of which eighty-six are newly classified lines.

© 1999 Optical Society of America

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References

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  1. V. Kaufman and J. Sugar, “Cd I isoelectronic sequence: wavelength and energy levels for Xe VII through Eu XVI,” J. Opt. Soc. Am. B 4, 1919–1923 (1987).
    [CrossRef]
  2. A. Tauheed and Y. N. Joshi, “Analysis of the 5s25p4–(5s5p5+5s25p35d+5s25p36s) transition array of trebly ionized cesium (Cs IV),” J. Phys. B 27, 405–412 (1994).
    [CrossRef]
  3. A. Tauheed and Y. N. Joshi, “Analysis of four times ionized cesium (Cs V),” Phys. Scr. 47, 550–554 (1993).
    [CrossRef]
  4. A. Tauheed and Y. N. Joshi, “Analysis of the four lowest configurations of five times ionized cesium (Cs VI),” Phys. Scr. 44, 579–581 (1991).
    [CrossRef]
  5. B. Arcimowicz and Y. N. Joshi, “The 5d95s–5d95p transitions in the tenth spectrum of cesium: Cs X,” Can. J. Phys. 69, 24–27 (1991).
    [CrossRef]
  6. S. S. Churilov, Y. N. Joshi, and A. N. Ryabtsev, “The 4d10 1S0–4d9(np+nf ) transitions in the Pd I isoelectronic sequence from Cd III to Cs X,” J. Phys. B 27, 5485–5489 (1994).
    [CrossRef]
  7. Th. A. M. vanKleef and Y. N. Joshi, “Eleventh spectrum of cesium: Cs XI,” J. Opt. Soc. Am. 71, 55–59 (1981).
    [CrossRef]
  8. A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “Revised and extended analysis of I VI,” Phys. Scr. 56, 289–292 (1997).
    [CrossRef]
  9. G. H. Cavalcanti, F. R. T. Luna, A. G. Trigueiros, F. Bredice, H. Sobral, R. Hutton, and M. Wang, “Vacuum ultraviolet spectrum of six-times ionized xenon, Xe VII,” J. Opt. Soc. Am. B 14, 2459–2462 (1997).
    [CrossRef]
  10. R. Gayasov, Y. N. Joshi, and A. N. Ryabtsev, “Revised and extended analysis of nine-times ionized lanthanum (La X),” Phys. Scr. (to be published).
  11. R. L. Kelly and L. J. Palumbo, “Atomic and ionic emission lines below 2000 Å—hydrogen through krypton,” J. Phys. Chem. Ref. Data 16, 1 (1987).
  12. R. D. Cowan, The Theory of Atomic Structure and Spectra (U. California Press, Berkeley, Calif., 1981) and Cowan Code programs.
  13. V. I. Azarov, “Formal approach to the solution of complex spectra identification problem. 1 and 2,” Phys. Scr. 44, 528–538 (1993).
    [CrossRef]
  14. R. R. Gayasov, S. S. Churilov, A. N. Ryabtsev, Y. N. Joshi, and V. I. Azarov, “Interpretation of the level structure of the 4d8, 4d7(5p+4f ) and 4p54d9 configuration of the nine-times ionized iodine spectrum (I X),” J. Opt. Soc. Am. B 14, 1013–1028 (1997).
    [CrossRef]
  15. R. R. Gayasov and Y. N. Joshi, “Transitions from the configurations involving 4f-electrons in Cs IX–La XI and Cs XI–Ce XIV,” J. Phys. B 31, 705–709 (1998).
    [CrossRef]

1998 (1)

R. R. Gayasov and Y. N. Joshi, “Transitions from the configurations involving 4f-electrons in Cs IX–La XI and Cs XI–Ce XIV,” J. Phys. B 31, 705–709 (1998).
[CrossRef]

1997 (3)

1994 (2)

S. S. Churilov, Y. N. Joshi, and A. N. Ryabtsev, “The 4d10 1S0–4d9(np+nf ) transitions in the Pd I isoelectronic sequence from Cd III to Cs X,” J. Phys. B 27, 5485–5489 (1994).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of the 5s25p4–(5s5p5+5s25p35d+5s25p36s) transition array of trebly ionized cesium (Cs IV),” J. Phys. B 27, 405–412 (1994).
[CrossRef]

1993 (2)

A. Tauheed and Y. N. Joshi, “Analysis of four times ionized cesium (Cs V),” Phys. Scr. 47, 550–554 (1993).
[CrossRef]

V. I. Azarov, “Formal approach to the solution of complex spectra identification problem. 1 and 2,” Phys. Scr. 44, 528–538 (1993).
[CrossRef]

1991 (2)

A. Tauheed and Y. N. Joshi, “Analysis of the four lowest configurations of five times ionized cesium (Cs VI),” Phys. Scr. 44, 579–581 (1991).
[CrossRef]

B. Arcimowicz and Y. N. Joshi, “The 5d95s–5d95p transitions in the tenth spectrum of cesium: Cs X,” Can. J. Phys. 69, 24–27 (1991).
[CrossRef]

1987 (2)

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

V. Kaufman and J. Sugar, “Cd I isoelectronic sequence: wavelength and energy levels for Xe VII through Eu XVI,” J. Opt. Soc. Am. B 4, 1919–1923 (1987).
[CrossRef]

1981 (1)

Arcimowicz, B.

B. Arcimowicz and Y. N. Joshi, “The 5d95s–5d95p transitions in the tenth spectrum of cesium: Cs X,” Can. J. Phys. 69, 24–27 (1991).
[CrossRef]

Azarov, V. I.

Bredice, F.

Cavalcanti, G. H.

Churilov, S. S.

Gayasov, R. R.

Hutton, R.

Joshi, Y. N.

R. R. Gayasov and Y. N. Joshi, “Transitions from the configurations involving 4f-electrons in Cs IX–La XI and Cs XI–Ce XIV,” J. Phys. B 31, 705–709 (1998).
[CrossRef]

A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “Revised and extended analysis of I VI,” Phys. Scr. 56, 289–292 (1997).
[CrossRef]

R. R. Gayasov, S. S. Churilov, A. N. Ryabtsev, Y. N. Joshi, and V. I. Azarov, “Interpretation of the level structure of the 4d8, 4d7(5p+4f ) and 4p54d9 configuration of the nine-times ionized iodine spectrum (I X),” J. Opt. Soc. Am. B 14, 1013–1028 (1997).
[CrossRef]

S. S. Churilov, Y. N. Joshi, and A. N. Ryabtsev, “The 4d10 1S0–4d9(np+nf ) transitions in the Pd I isoelectronic sequence from Cd III to Cs X,” J. Phys. B 27, 5485–5489 (1994).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of the 5s25p4–(5s5p5+5s25p35d+5s25p36s) transition array of trebly ionized cesium (Cs IV),” J. Phys. B 27, 405–412 (1994).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of four times ionized cesium (Cs V),” Phys. Scr. 47, 550–554 (1993).
[CrossRef]

B. Arcimowicz and Y. N. Joshi, “The 5d95s–5d95p transitions in the tenth spectrum of cesium: Cs X,” Can. J. Phys. 69, 24–27 (1991).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of the four lowest configurations of five times ionized cesium (Cs VI),” Phys. Scr. 44, 579–581 (1991).
[CrossRef]

Th. A. M. vanKleef and Y. N. Joshi, “Eleventh spectrum of cesium: Cs XI,” J. Opt. Soc. Am. 71, 55–59 (1981).
[CrossRef]

Kaufman, V.

Kelly, R. L.

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

Luna, F. R. T.

Palumbo, L. J.

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

Pinnington, E. H.

A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “Revised and extended analysis of I VI,” Phys. Scr. 56, 289–292 (1997).
[CrossRef]

Ryabtsev, A. N.

Sobral, H.

Sugar, J.

Tauheed, A.

A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “Revised and extended analysis of I VI,” Phys. Scr. 56, 289–292 (1997).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of the 5s25p4–(5s5p5+5s25p35d+5s25p36s) transition array of trebly ionized cesium (Cs IV),” J. Phys. B 27, 405–412 (1994).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of four times ionized cesium (Cs V),” Phys. Scr. 47, 550–554 (1993).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of the four lowest configurations of five times ionized cesium (Cs VI),” Phys. Scr. 44, 579–581 (1991).
[CrossRef]

Trigueiros, A. G.

vanKleef, Th. A. M.

Wang, M.

Can. J. Phys. (1)

B. Arcimowicz and Y. N. Joshi, “The 5d95s–5d95p transitions in the tenth spectrum of cesium: Cs X,” Can. J. Phys. 69, 24–27 (1991).
[CrossRef]

J. Opt. Soc. Am. (1)

J. Opt. Soc. Am. B (3)

J. Phys. B (3)

R. R. Gayasov and Y. N. Joshi, “Transitions from the configurations involving 4f-electrons in Cs IX–La XI and Cs XI–Ce XIV,” J. Phys. B 31, 705–709 (1998).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of the 5s25p4–(5s5p5+5s25p35d+5s25p36s) transition array of trebly ionized cesium (Cs IV),” J. Phys. B 27, 405–412 (1994).
[CrossRef]

S. S. Churilov, Y. N. Joshi, and A. N. Ryabtsev, “The 4d10 1S0–4d9(np+nf ) transitions in the Pd I isoelectronic sequence from Cd III to Cs X,” J. Phys. B 27, 5485–5489 (1994).
[CrossRef]

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

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

Phys. Scr. (4)

V. I. Azarov, “Formal approach to the solution of complex spectra identification problem. 1 and 2,” Phys. Scr. 44, 528–538 (1993).
[CrossRef]

A. Tauheed, Y. N. Joshi, and E. H. Pinnington, “Revised and extended analysis of I VI,” Phys. Scr. 56, 289–292 (1997).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of four times ionized cesium (Cs V),” Phys. Scr. 47, 550–554 (1993).
[CrossRef]

A. Tauheed and Y. N. Joshi, “Analysis of the four lowest configurations of five times ionized cesium (Cs VI),” Phys. Scr. 44, 579–581 (1991).
[CrossRef]

Other (2)

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

R. Gayasov, Y. N. Joshi, and A. N. Ryabtsev, “Revised and extended analysis of nine-times ionized lanthanum (La X),” Phys. Scr. (to be published).

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Figures (1)

Fig. 1
Fig. 1

Sample of the cesium spectrum in the 645–675-Å region recorded on a 3-m normal incidence spectrograph under a, high; b, medium; and c, low excitation conditions. Cs iii to Cs ix lines are identified. Cs vii, viii, and ix lines show polarity. Cs ix lines disappear on exposure (c). Cs viii lines decrease appreciably in intensity from a to c and move slightly upward.

Tables (4)

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Table 1 Energy Levels (cm-1) of the Even and Odd Configurations of Cs viii

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Table 2 LS-Fitted Energy Parameters (cm-1) and Their Ratios to HFR Parameter of the Even-Parity Configurations of CS viii

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Table 3 LS-Fitted Energy Parameters (cm-1) and Their Ratios to HFR Parameters of the Odd-Parity Configurations of Cs viii

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Table 4 Classified Lines in Cs viii

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