Abstract

Cerium spectra were recorded in the 100–1240-Å region by use of laser-produced plasma and triggered spark sources. An earlier analysis of Ce xi was almost completely revised. In the even-parity system we established 31 levels belonging to the 5s2, 5p2, 5s5d, 5s6s, 4f5p, and 4f2 configuration, of which 28 are new levels. In the odd-parity system we established 36 levels, 31 of them new, belonging to the 5s5p, 5p5d, 4f5s, 5s5f, and 5s6p configurations. The 4f2 and 4f5d configurations have been identified in the Cd i isoelectronic sequence for the first time to our knowledge. One hundred twenty-four lines have been classified in Ce xi. Hartree–Fock and least-squares-fitting calculations were carried out, and they represent the observed spectrum satisfactorily. The ionization potential of the Ce xi ion has been estimated to be 1 468 150±100 cm-1 (181.99±0.01 eV).

© 2001 Optical Society of America

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References

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  1. V. Kaufman and J. Sugar, “Cd I isoelectronic sequence: wavelengths and energy levels for Xe VII through Eu XVI,” J. Opt. Soc. Am. B 4, 1919–1923 (1987).
    [CrossRef]
  2. S. S. Churilov and Y. N. Joshi, “Revised and extended analysis of the odd parity configurations of five-times-ionized xenon: Xe XI,” Phys. Scr. 62, 358–363 (2000); references for Sb → I are here.
    [CrossRef]
  3. R. Gayasov and Y. N. Joshi, “Revised and extended analysis of six-times-ionized cesium: Cs VII,” Phys. Scr. 60, 312–320 (1999).
    [CrossRef]
  4. R. Gayasov and Y. N. Joshi, “Revised and extended analysis of seven-time-ionized cesium: Cs VIII,” J. Opt. Soc. Am. B 16, 1280–1285 (1999).
    [CrossRef]
  5. S. S. Churilov, Y. N. Joshi, and R. Gayasov, “Analysis of seven-times-ionized barium: Ba VIII,” J. Opt. Soc. Am. B 18, 113–120 (2001).
    [CrossRef]
  6. S. S. Churilov and Y. N. Joshi, “Revised and extended analysis of eight-times ionized barium: Ba IX and nine-times-ionized barium: Ba X,” Phys. Scr. 62, 282–288 (2000).
    [CrossRef]
  7. R. Gayasov and Y. N. Joshi, “The spectrum of La IX: an interesting example of configuration interaction,” J. Opt. Soc. Am. B 15, 2614–2619 (1998).
    [CrossRef]
  8. R. Gayasov, Y. N. Joshi, and A. N. Ryabtsev, “Revised and extended analysis of nine-times-ionized lanthanum: La X,” Phys. Scr. 59, 419–425 (1999).
    [CrossRef]
  9. R. Gayasov and Y. N. Joshi, “4d9–4d85p transitions in La XIII and Ce XIV,” Phys. Scr. 60, 225–227 (1999).
    [CrossRef]
  10. R. L. Kelly and L. J. Palumbo, “Atomic and ionic emission lines below 2000 Å—hydrogen through krypton,” J. Phys. Chem. Ref. Data 16, 1–247 (1987).
  11. L. A. Svensson and J. O. Ekberg, “The titanium vacuum spark spectrum for 50 Å–425 Å,” Ark. Fys. 40, 145–162 (1969).
  12. R. D. Cowan, The Theory of Atomic Structure and Spectra (U. California Press, Berkeley, Calif., 1981).
  13. V. I. Azarov, “Formal approach to the solution of the complex-spectra identification problem. I. Theory,” Phys. Scr. 44, 528–538 (1991).
    [CrossRef]
  14. V. I. Azarov, “Formal approach to the solution of the complex-spectra identification problem. 2. Implementation,” Phys. Scr. 48, 656–667 (1993).
    [CrossRef]

2001 (1)

2000 (1)

S. S. Churilov and Y. N. Joshi, “Revised and extended analysis of eight-times ionized barium: Ba IX and nine-times-ionized barium: Ba X,” Phys. Scr. 62, 282–288 (2000).
[CrossRef]

1999 (4)

R. Gayasov, Y. N. Joshi, and A. N. Ryabtsev, “Revised and extended analysis of nine-times-ionized lanthanum: La X,” Phys. Scr. 59, 419–425 (1999).
[CrossRef]

R. Gayasov and Y. N. Joshi, “4d9–4d85p transitions in La XIII and Ce XIV,” Phys. Scr. 60, 225–227 (1999).
[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]

R. Gayasov and Y. N. Joshi, “Revised and extended analysis of seven-time-ionized cesium: Cs VIII,” J. Opt. Soc. Am. B 16, 1280–1285 (1999).
[CrossRef]

1998 (1)

1993 (1)

V. I. Azarov, “Formal approach to the solution of the complex-spectra identification problem. 2. Implementation,” Phys. Scr. 48, 656–667 (1993).
[CrossRef]

1991 (1)

V. I. Azarov, “Formal approach to the solution of the complex-spectra identification problem. I. Theory,” Phys. Scr. 44, 528–538 (1991).
[CrossRef]

1987 (2)

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

R. L. Kelly and L. J. Palumbo, “Atomic and ionic emission lines below 2000 Å—hydrogen through krypton,” J. Phys. Chem. Ref. Data 16, 1–247 (1987).

1969 (1)

L. A. Svensson and J. O. Ekberg, “The titanium vacuum spark spectrum for 50 Å–425 Å,” Ark. Fys. 40, 145–162 (1969).

Azarov, V. I.

V. I. Azarov, “Formal approach to the solution of the complex-spectra identification problem. 2. Implementation,” Phys. Scr. 48, 656–667 (1993).
[CrossRef]

V. I. Azarov, “Formal approach to the solution of the complex-spectra identification problem. I. Theory,” Phys. Scr. 44, 528–538 (1991).
[CrossRef]

Churilov, S. S.

S. S. Churilov, Y. N. Joshi, and R. Gayasov, “Analysis of seven-times-ionized barium: Ba VIII,” J. Opt. Soc. Am. B 18, 113–120 (2001).
[CrossRef]

S. S. Churilov and Y. N. Joshi, “Revised and extended analysis of eight-times ionized barium: Ba IX and nine-times-ionized barium: Ba X,” Phys. Scr. 62, 282–288 (2000).
[CrossRef]

Ekberg, J. O.

L. A. Svensson and J. O. Ekberg, “The titanium vacuum spark spectrum for 50 Å–425 Å,” Ark. Fys. 40, 145–162 (1969).

Gayasov, R.

S. S. Churilov, Y. N. Joshi, and R. Gayasov, “Analysis of seven-times-ionized barium: Ba VIII,” J. Opt. Soc. Am. B 18, 113–120 (2001).
[CrossRef]

R. Gayasov and Y. N. Joshi, “4d9–4d85p transitions in La XIII and Ce XIV,” Phys. Scr. 60, 225–227 (1999).
[CrossRef]

R. Gayasov and Y. N. Joshi, “Revised and extended analysis of seven-time-ionized cesium: Cs VIII,” J. Opt. Soc. Am. B 16, 1280–1285 (1999).
[CrossRef]

R. Gayasov, Y. N. Joshi, and A. N. Ryabtsev, “Revised and extended analysis of nine-times-ionized lanthanum: La X,” Phys. Scr. 59, 419–425 (1999).
[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]

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

Joshi, Y. N.

S. S. Churilov, Y. N. Joshi, and R. Gayasov, “Analysis of seven-times-ionized barium: Ba VIII,” J. Opt. Soc. Am. B 18, 113–120 (2001).
[CrossRef]

S. S. Churilov and Y. N. Joshi, “Revised and extended analysis of eight-times ionized barium: Ba IX and nine-times-ionized barium: Ba X,” Phys. Scr. 62, 282–288 (2000).
[CrossRef]

R. Gayasov and Y. N. Joshi, “Revised and extended analysis of seven-time-ionized cesium: Cs VIII,” J. Opt. Soc. Am. B 16, 1280–1285 (1999).
[CrossRef]

R. Gayasov, Y. N. Joshi, and A. N. Ryabtsev, “Revised and extended analysis of nine-times-ionized lanthanum: La X,” Phys. Scr. 59, 419–425 (1999).
[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]

R. Gayasov and Y. N. Joshi, “4d9–4d85p transitions in La XIII and Ce XIV,” Phys. Scr. 60, 225–227 (1999).
[CrossRef]

R. Gayasov and Y. N. Joshi, “The spectrum of La IX: an interesting example of configuration interaction,” J. Opt. Soc. Am. B 15, 2614–2619 (1998).
[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, 1–247 (1987).

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, 1–247 (1987).

Ryabtsev, A. N.

R. Gayasov, Y. N. Joshi, and A. N. Ryabtsev, “Revised and extended analysis of nine-times-ionized lanthanum: La X,” Phys. Scr. 59, 419–425 (1999).
[CrossRef]

Sugar, J.

Svensson, L. A.

L. A. Svensson and J. O. Ekberg, “The titanium vacuum spark spectrum for 50 Å–425 Å,” Ark. Fys. 40, 145–162 (1969).

Ark. Fys. (1)

L. A. Svensson and J. O. Ekberg, “The titanium vacuum spark spectrum for 50 Å–425 Å,” Ark. Fys. 40, 145–162 (1969).

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

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, 1–247 (1987).

Phys. Scr. (6)

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, Y. N. Joshi, and A. N. Ryabtsev, “Revised and extended analysis of nine-times-ionized lanthanum: La X,” Phys. Scr. 59, 419–425 (1999).
[CrossRef]

R. Gayasov and Y. N. Joshi, “4d9–4d85p transitions in La XIII and Ce XIV,” Phys. Scr. 60, 225–227 (1999).
[CrossRef]

V. I. Azarov, “Formal approach to the solution of the complex-spectra identification problem. I. Theory,” Phys. Scr. 44, 528–538 (1991).
[CrossRef]

V. I. Azarov, “Formal approach to the solution of the complex-spectra identification problem. 2. Implementation,” Phys. Scr. 48, 656–667 (1993).
[CrossRef]

S. S. Churilov and Y. N. Joshi, “Revised and extended analysis of eight-times ionized barium: Ba IX and nine-times-ionized barium: Ba X,” Phys. Scr. 62, 282–288 (2000).
[CrossRef]

Other (2)

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

S. S. Churilov and Y. N. Joshi, “Revised and extended analysis of the odd parity configurations of five-times-ionized xenon: Xe XI,” Phys. Scr. 62, 358–363 (2000); references for Sb → I are here.
[CrossRef]

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Tables (3)

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Table 1 Energy Levels (cm-1) of the Cd-like Ce xi Ion

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Table 2 LSFa and HF Energy Parameters of Odd- and Even-Parity Configurations of Ce xi

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Table 3 Classified Spectral Lines of the Cd-like Ce xi Ion

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