Abstract

The spectrum of the copperlike ion Kr viii was observed with a low-inductance spark and 10.7-m normal- and grazing-incidence spectrographs. A total of 46 new lines with wavelengths ranging from 115 to 696 Å were identified: 18 of the type 3d10nl–3d10nl′, 10 of the type 3d104s–3d94s4p, and 18 of the type 3d104p–3d94p2. From these lines 37 new energy levels were determined: 14 of the type 3d10nl, 10 belonging to 3d94s4p, and 13 to 3d94p2. New values for all known levels were derived by combining the present results with measurements at longer wavelength by Gallardo et al. [ Appl. Opt. 28, 5088 ( 1989)]. The ionization energy was found to be 1014665 ± 25 cm−1 (125.802 ± 0.003 eV). New wavelength measurements were made for the 3d10–3d94p, 4f resonance lines of the nickellike ion Kr ix.

© 1991 Optical Society of America

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  1. B. C. Fawcett, B. B. Jones, R. Wilson, “Vacuum ultraviolet spectra of multiply ionized inert gases,” Proc. Phys. Soc. London 78, 1223 (1961).
    [CrossRef]
  2. E. Schönheit, “Die Spektren von hochionisiertem Neon, Argon, Krypton und Xenon einer neuen Lichtquelle für das Vakuum-Ultraviolet,” Optik (Stuttgart) 23, 409 (1966).
  3. M. Druetta, J. P. Buchet, “Beam-foil study of krypton between 400 and 800 Å,” J. Opt. Soc. Am. 66, 433 (1976).
    [CrossRef]
  4. A. E. Livingston, L. J. Curtis, R. M. Schectman, H. G. Berry, “Energies and lifetimes of excited states in copperlike Kr viii,” Phys. Rev. A 21, 771 (1980).
    [CrossRef]
  5. A. McPherson, G. Gibson, H. Jara, U. Johann, T. S. Luk, I. A. McIntyre, K. Boyer, C. K. Rhodes, “Studies of multiphoton production of vacuum-ultraviolet radiation in the rare gases,” J. Opt. Soc. Am. B 4, 595 (1987).
    [CrossRef]
  6. L. J. Curtis, D. G. Ellis, “A formula for cancellation disappearances of atomic oscillator strengths,” J. Phys. B 11, L543 (1978).
    [CrossRef]
  7. L. J. Curtis, “Cancellations in atomic dipole transition moments in the Cu isoelectronic sequence,” J. Opt. Soc. Am. 71, 566 (1981).
    [CrossRef]
  8. M. Gallardo, F. Bredice, M. Raineri, J. Reyna Almandos, S. G. Pettersson, A. G. Trigueiros, “New spectroscopic results in Kr viii,” Appl. Opt. 28, 5088 (1989).
    [CrossRef] [PubMed]
  9. J.-F. Wyart, Th. A. M. van Kleef, A. N. Ryabtsev, Y. N. Joshi, “Extended analysis of 3d–4p transitions in copper like ions of the sequence Ge3+–Mo13+,”, Phys. Scr. 29, 319 (1984).
    [CrossRef]
  10. A. N. Ryabtsev, J. F. Wyart, Th. A. M. van Kleef, Y. N. Joshi, “Observation of autoionizing energy levels in the spectra of copper-like ions As v, Se vi and Br vii,” Phys. Scr. 30, 407 (1984).
    [CrossRef]
  11. U. Feldman, M. Swartz, L. Cohen, “Vacuum ultraviolet source,” Rev. Sci. Instrum. 38, 1372 (1967).
    [CrossRef]
  12. L. Ȧ. Svensson, J. O. Ekberg, “The titanium vacuum-spark spectrum from 50 to 425 Å,” Ark. Fys. 40, 145 (1969).
  13. J. O. Ekberg, L. Ȧ. Svensson, “Spectrum and term system of Ti xii,” Phys. Scr. 12, 116 (1975).
    [CrossRef]
  14. J. Reader, G. L. Epstein, J. O. Ekberg, “Spectra of Rb ii, Sr iii, Y iv, Zr v, Nb vi, and Mo vii in the vacuum ultraviolet,” J. Opt. Soc. Am. 62, 273 (1972).
    [CrossRef]
  15. J. Reader, G. L. Epstein, “Analysis of the spectrum of quadruply ionized yttrium (Y v),” J. Opt. Soc. Am. 62, 619 (1972).
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  16. W. Persson, J. Reader, “Spectrum and energy levels of Y vi,” J. Opt. Soc. Am. B 3, 959 (1986).
    [CrossRef]
  17. J. Reader, N. Acquista, “4s24p3–4s 4p4 and 4s24p3–4s24p25s transitions in Y vii, Zr viii, Nb ix, and Mo x,” J. Opt. Soc. Am. 71, 434 (1981).
    [CrossRef]
  18. U. Litzén, J. Reader, “4s24p2–4s 4p3 transition array and energy levels of the germanium-like ions Rb vi–Mo xi,” Phys. Scr. 39, 468 (1989).
    [CrossRef]
  19. U. Litzén, J. Reader, “Spectra and energy levels of the galliumlike ions Rb vii–Mo xii,” Phys. Scr. 39, 73 (1989).
    [CrossRef]
  20. U. Litzén, J. Reader, “Spectra and energy levels of ions in the zinc isoelectronic sequence from Rb viii to Mo xiii,” Phys. Rev. A 36, 5159 (1987).
    [CrossRef]
  21. J. Reader, N. Acquista, “Spectrum and energy levels of ten-times ionized yttrium (Y xi),” J. Opt. Soc. Am. 69, 1285 (1979).
    [CrossRef]
  22. W. Persson, S. G. Pettersson, “4s24p3 and 4s 4p4 configurations in Kr iv, Rb v, and Sr vi,” Phys. Scr. 29, 308 (1984).
    [CrossRef]
  23. A. Trigueiros, S.-G. Pettersson, J. G. Reyna Almandos, “Transitions within the n= 4 complex of Kr vii obtained from a theta-pinch light source,” Phys. Scr. 34, 164 (1986).
    [CrossRef]
  24. R. L. Kelly, “Atomic and ionic spectrum lines below 2000 angstroms: hydrogen through krypton,” J. Phys. Chem. Ref. Data 16, Suppl. 1 (1987).
  25. A. E. Livingston, S. J. Hinterlong, “Spectrum of Br vii,” Phys. Rev. A 23, 758 (1981).
    [CrossRef]
  26. Y. N. Joshi, Th. A. M. van Kleef, “Revised and extended analysis of the 3d10nl configurations in As v, Se vi, and Br vii,” Can. J. Phys. 64, 330 (1986).
    [CrossRef]
  27. E. H. Pinnington, J. L. Bahr, J. A. Kernahan, D. J. G. Irwin, “Beam-foil spectroscopy of As iii, iv, and v,” J. Phys. B 14, 1291 (1981).
    [CrossRef]
  28. K.-T. Cheng, Y.-K. Kim, “Energy levels, wavelengths, and transition probabilities for Cu-like ions,” At. Data Nucl. Data Tables 22, 547 (1978).
    [CrossRef]
  29. B. Cardon, MIT Lincoln Laboratory, P.O. Box 73, Lexington, Mass. 02173-9108 (personal communication to J. Reader, 1978).
  30. B. L. Cardon, “The beam-foil spectra of krypton (2 to 5 MeV),” Ph.D. dissertation (University of Arizona, Tucson, Ariz., 1977; University Microfilms International, Ann Arbor, Mich., order no. 77-18, 667).
  31. Optimization of the level values was done with the computer code elcalc written by L. J. Radziemski, Department of Physics, New Mexico State University, Las Cruces, N.M. 88003. The procedure and definition of the level value uncertainties are described by L. J. Radziemski, V. Kaufman, “Wavelengths, energy levels, and analysis of neutral atomic chlorine (Cl i)” J. Opt. Soc. Am. 59, 424 (1969).
    [CrossRef]
  32. J.-F. Wyart, J. Reader, A. Ryabtsev, “3d–4p transitions in the zinclike and copperlike ions Y x, xi; Zr xi, xii; Nb xii, xiii; and Mo xiii, xiv,” J. Opt. Soc. Am. 71, 692 (1981).
    [CrossRef]
  33. R. D. Cowan, The Theory of Atomic Structure and Spectra (U. California Press, Berkeley, Calif., 1981).
  34. C. Froese Fischer, “A multi-configuration Hartree–Fock program with improved stability,” Comput. Phys. Commun. 4, 107 (1972).
    [CrossRef]
  35. W. R. Johnson, S. A. Blundell, J. Sapirstein, “Many-body perturbation theory calculations of energy levels along the copper isoelectronic sequence,” Phys. Rev. A (to be published).
  36. W. R. Johnson, D. Kolb, K.-N. Huang, “Electric–dipole, quadrupole, and magnetic–dipole susceptibilities and shielding factors for closed-shell ions of the He, Ne, Ar, Ni(Cu+), Kr, Pd, and Xe isoelectronic sequences,” At. Data Nucl. Data Tables 28, 333 (1983).
    [CrossRef]
  37. C. E. Moore, Atomic Energy Levels, Natl. Bur. Std. (US) Circ. 467(1952), Vol. II.
  38. B. C. Fawcett, A. H. Gabriel, “Resonance lines of argon xi and xii and krypton ix and x,” Proc. Phys. Soc. London 84, 1038 (1964).
    [CrossRef]

1989

M. Gallardo, F. Bredice, M. Raineri, J. Reyna Almandos, S. G. Pettersson, A. G. Trigueiros, “New spectroscopic results in Kr viii,” Appl. Opt. 28, 5088 (1989).
[CrossRef] [PubMed]

U. Litzén, J. Reader, “4s24p2–4s 4p3 transition array and energy levels of the germanium-like ions Rb vi–Mo xi,” Phys. Scr. 39, 468 (1989).
[CrossRef]

U. Litzén, J. Reader, “Spectra and energy levels of the galliumlike ions Rb vii–Mo xii,” Phys. Scr. 39, 73 (1989).
[CrossRef]

1987

U. Litzén, J. Reader, “Spectra and energy levels of ions in the zinc isoelectronic sequence from Rb viii to Mo xiii,” Phys. Rev. A 36, 5159 (1987).
[CrossRef]

R. L. Kelly, “Atomic and ionic spectrum lines below 2000 angstroms: hydrogen through krypton,” J. Phys. Chem. Ref. Data 16, Suppl. 1 (1987).

A. McPherson, G. Gibson, H. Jara, U. Johann, T. S. Luk, I. A. McIntyre, K. Boyer, C. K. Rhodes, “Studies of multiphoton production of vacuum-ultraviolet radiation in the rare gases,” J. Opt. Soc. Am. B 4, 595 (1987).
[CrossRef]

1986

W. Persson, J. Reader, “Spectrum and energy levels of Y vi,” J. Opt. Soc. Am. B 3, 959 (1986).
[CrossRef]

A. Trigueiros, S.-G. Pettersson, J. G. Reyna Almandos, “Transitions within the n= 4 complex of Kr vii obtained from a theta-pinch light source,” Phys. Scr. 34, 164 (1986).
[CrossRef]

Y. N. Joshi, Th. A. M. van Kleef, “Revised and extended analysis of the 3d10nl configurations in As v, Se vi, and Br vii,” Can. J. Phys. 64, 330 (1986).
[CrossRef]

1984

W. Persson, S. G. Pettersson, “4s24p3 and 4s 4p4 configurations in Kr iv, Rb v, and Sr vi,” Phys. Scr. 29, 308 (1984).
[CrossRef]

J.-F. Wyart, Th. A. M. van Kleef, A. N. Ryabtsev, Y. N. Joshi, “Extended analysis of 3d–4p transitions in copper like ions of the sequence Ge3+–Mo13+,”, Phys. Scr. 29, 319 (1984).
[CrossRef]

A. N. Ryabtsev, J. F. Wyart, Th. A. M. van Kleef, Y. N. Joshi, “Observation of autoionizing energy levels in the spectra of copper-like ions As v, Se vi and Br vii,” Phys. Scr. 30, 407 (1984).
[CrossRef]

1983

W. R. Johnson, D. Kolb, K.-N. Huang, “Electric–dipole, quadrupole, and magnetic–dipole susceptibilities and shielding factors for closed-shell ions of the He, Ne, Ar, Ni(Cu+), Kr, Pd, and Xe isoelectronic sequences,” At. Data Nucl. Data Tables 28, 333 (1983).
[CrossRef]

1981

1980

A. E. Livingston, L. J. Curtis, R. M. Schectman, H. G. Berry, “Energies and lifetimes of excited states in copperlike Kr viii,” Phys. Rev. A 21, 771 (1980).
[CrossRef]

1979

1978

K.-T. Cheng, Y.-K. Kim, “Energy levels, wavelengths, and transition probabilities for Cu-like ions,” At. Data Nucl. Data Tables 22, 547 (1978).
[CrossRef]

L. J. Curtis, D. G. Ellis, “A formula for cancellation disappearances of atomic oscillator strengths,” J. Phys. B 11, L543 (1978).
[CrossRef]

1976

1975

J. O. Ekberg, L. Ȧ. Svensson, “Spectrum and term system of Ti xii,” Phys. Scr. 12, 116 (1975).
[CrossRef]

1972

1969

L. Ȧ. Svensson, J. O. Ekberg, “The titanium vacuum-spark spectrum from 50 to 425 Å,” Ark. Fys. 40, 145 (1969).

1967

U. Feldman, M. Swartz, L. Cohen, “Vacuum ultraviolet source,” Rev. Sci. Instrum. 38, 1372 (1967).
[CrossRef]

1966

E. Schönheit, “Die Spektren von hochionisiertem Neon, Argon, Krypton und Xenon einer neuen Lichtquelle für das Vakuum-Ultraviolet,” Optik (Stuttgart) 23, 409 (1966).

1964

B. C. Fawcett, A. H. Gabriel, “Resonance lines of argon xi and xii and krypton ix and x,” Proc. Phys. Soc. London 84, 1038 (1964).
[CrossRef]

1961

B. C. Fawcett, B. B. Jones, R. Wilson, “Vacuum ultraviolet spectra of multiply ionized inert gases,” Proc. Phys. Soc. London 78, 1223 (1961).
[CrossRef]

1952

C. E. Moore, Atomic Energy Levels, Natl. Bur. Std. (US) Circ. 467(1952), Vol. II.

Acquista, N.

Bahr, J. L.

E. H. Pinnington, J. L. Bahr, J. A. Kernahan, D. J. G. Irwin, “Beam-foil spectroscopy of As iii, iv, and v,” J. Phys. B 14, 1291 (1981).
[CrossRef]

Berry, H. G.

A. E. Livingston, L. J. Curtis, R. M. Schectman, H. G. Berry, “Energies and lifetimes of excited states in copperlike Kr viii,” Phys. Rev. A 21, 771 (1980).
[CrossRef]

Blundell, S. A.

W. R. Johnson, S. A. Blundell, J. Sapirstein, “Many-body perturbation theory calculations of energy levels along the copper isoelectronic sequence,” Phys. Rev. A (to be published).

Boyer, K.

Bredice, F.

Buchet, J. P.

Cardon, B.

B. Cardon, MIT Lincoln Laboratory, P.O. Box 73, Lexington, Mass. 02173-9108 (personal communication to J. Reader, 1978).

Cardon, B. L.

B. L. Cardon, “The beam-foil spectra of krypton (2 to 5 MeV),” Ph.D. dissertation (University of Arizona, Tucson, Ariz., 1977; University Microfilms International, Ann Arbor, Mich., order no. 77-18, 667).

Cheng, K.-T.

K.-T. Cheng, Y.-K. Kim, “Energy levels, wavelengths, and transition probabilities for Cu-like ions,” At. Data Nucl. Data Tables 22, 547 (1978).
[CrossRef]

Cohen, L.

U. Feldman, M. Swartz, L. Cohen, “Vacuum ultraviolet source,” Rev. Sci. Instrum. 38, 1372 (1967).
[CrossRef]

Cowan, R. D.

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

Curtis, L. J.

L. J. Curtis, “Cancellations in atomic dipole transition moments in the Cu isoelectronic sequence,” J. Opt. Soc. Am. 71, 566 (1981).
[CrossRef]

A. E. Livingston, L. J. Curtis, R. M. Schectman, H. G. Berry, “Energies and lifetimes of excited states in copperlike Kr viii,” Phys. Rev. A 21, 771 (1980).
[CrossRef]

L. J. Curtis, D. G. Ellis, “A formula for cancellation disappearances of atomic oscillator strengths,” J. Phys. B 11, L543 (1978).
[CrossRef]

Druetta, M.

Ekberg, J. O.

J. O. Ekberg, L. Ȧ. Svensson, “Spectrum and term system of Ti xii,” Phys. Scr. 12, 116 (1975).
[CrossRef]

J. Reader, G. L. Epstein, J. O. Ekberg, “Spectra of Rb ii, Sr iii, Y iv, Zr v, Nb vi, and Mo vii in the vacuum ultraviolet,” J. Opt. Soc. Am. 62, 273 (1972).
[CrossRef]

L. Ȧ. Svensson, J. O. Ekberg, “The titanium vacuum-spark spectrum from 50 to 425 Å,” Ark. Fys. 40, 145 (1969).

Ellis, D. G.

L. J. Curtis, D. G. Ellis, “A formula for cancellation disappearances of atomic oscillator strengths,” J. Phys. B 11, L543 (1978).
[CrossRef]

Epstein, G. L.

Fawcett, B. C.

B. C. Fawcett, A. H. Gabriel, “Resonance lines of argon xi and xii and krypton ix and x,” Proc. Phys. Soc. London 84, 1038 (1964).
[CrossRef]

B. C. Fawcett, B. B. Jones, R. Wilson, “Vacuum ultraviolet spectra of multiply ionized inert gases,” Proc. Phys. Soc. London 78, 1223 (1961).
[CrossRef]

Feldman, U.

U. Feldman, M. Swartz, L. Cohen, “Vacuum ultraviolet source,” Rev. Sci. Instrum. 38, 1372 (1967).
[CrossRef]

Froese Fischer, C.

C. Froese Fischer, “A multi-configuration Hartree–Fock program with improved stability,” Comput. Phys. Commun. 4, 107 (1972).
[CrossRef]

Gabriel, A. H.

B. C. Fawcett, A. H. Gabriel, “Resonance lines of argon xi and xii and krypton ix and x,” Proc. Phys. Soc. London 84, 1038 (1964).
[CrossRef]

Gallardo, M.

Gibson, G.

Hinterlong, S. J.

A. E. Livingston, S. J. Hinterlong, “Spectrum of Br vii,” Phys. Rev. A 23, 758 (1981).
[CrossRef]

Huang, K.-N.

W. R. Johnson, D. Kolb, K.-N. Huang, “Electric–dipole, quadrupole, and magnetic–dipole susceptibilities and shielding factors for closed-shell ions of the He, Ne, Ar, Ni(Cu+), Kr, Pd, and Xe isoelectronic sequences,” At. Data Nucl. Data Tables 28, 333 (1983).
[CrossRef]

Irwin, D. J. G.

E. H. Pinnington, J. L. Bahr, J. A. Kernahan, D. J. G. Irwin, “Beam-foil spectroscopy of As iii, iv, and v,” J. Phys. B 14, 1291 (1981).
[CrossRef]

Jara, H.

Johann, U.

Johnson, W. R.

W. R. Johnson, D. Kolb, K.-N. Huang, “Electric–dipole, quadrupole, and magnetic–dipole susceptibilities and shielding factors for closed-shell ions of the He, Ne, Ar, Ni(Cu+), Kr, Pd, and Xe isoelectronic sequences,” At. Data Nucl. Data Tables 28, 333 (1983).
[CrossRef]

W. R. Johnson, S. A. Blundell, J. Sapirstein, “Many-body perturbation theory calculations of energy levels along the copper isoelectronic sequence,” Phys. Rev. A (to be published).

Jones, B. B.

B. C. Fawcett, B. B. Jones, R. Wilson, “Vacuum ultraviolet spectra of multiply ionized inert gases,” Proc. Phys. Soc. London 78, 1223 (1961).
[CrossRef]

Joshi, Y. N.

Y. N. Joshi, Th. A. M. van Kleef, “Revised and extended analysis of the 3d10nl configurations in As v, Se vi, and Br vii,” Can. J. Phys. 64, 330 (1986).
[CrossRef]

A. N. Ryabtsev, J. F. Wyart, Th. A. M. van Kleef, Y. N. Joshi, “Observation of autoionizing energy levels in the spectra of copper-like ions As v, Se vi and Br vii,” Phys. Scr. 30, 407 (1984).
[CrossRef]

J.-F. Wyart, Th. A. M. van Kleef, A. N. Ryabtsev, Y. N. Joshi, “Extended analysis of 3d–4p transitions in copper like ions of the sequence Ge3+–Mo13+,”, Phys. Scr. 29, 319 (1984).
[CrossRef]

Kelly, R. L.

R. L. Kelly, “Atomic and ionic spectrum lines below 2000 angstroms: hydrogen through krypton,” J. Phys. Chem. Ref. Data 16, Suppl. 1 (1987).

Kernahan, J. A.

E. H. Pinnington, J. L. Bahr, J. A. Kernahan, D. J. G. Irwin, “Beam-foil spectroscopy of As iii, iv, and v,” J. Phys. B 14, 1291 (1981).
[CrossRef]

Kim, Y.-K.

K.-T. Cheng, Y.-K. Kim, “Energy levels, wavelengths, and transition probabilities for Cu-like ions,” At. Data Nucl. Data Tables 22, 547 (1978).
[CrossRef]

Kolb, D.

W. R. Johnson, D. Kolb, K.-N. Huang, “Electric–dipole, quadrupole, and magnetic–dipole susceptibilities and shielding factors for closed-shell ions of the He, Ne, Ar, Ni(Cu+), Kr, Pd, and Xe isoelectronic sequences,” At. Data Nucl. Data Tables 28, 333 (1983).
[CrossRef]

Litzén, U.

U. Litzén, J. Reader, “4s24p2–4s 4p3 transition array and energy levels of the germanium-like ions Rb vi–Mo xi,” Phys. Scr. 39, 468 (1989).
[CrossRef]

U. Litzén, J. Reader, “Spectra and energy levels of the galliumlike ions Rb vii–Mo xii,” Phys. Scr. 39, 73 (1989).
[CrossRef]

U. Litzén, J. Reader, “Spectra and energy levels of ions in the zinc isoelectronic sequence from Rb viii to Mo xiii,” Phys. Rev. A 36, 5159 (1987).
[CrossRef]

Livingston, A. E.

A. E. Livingston, S. J. Hinterlong, “Spectrum of Br vii,” Phys. Rev. A 23, 758 (1981).
[CrossRef]

A. E. Livingston, L. J. Curtis, R. M. Schectman, H. G. Berry, “Energies and lifetimes of excited states in copperlike Kr viii,” Phys. Rev. A 21, 771 (1980).
[CrossRef]

Luk, T. S.

McIntyre, I. A.

McPherson, A.

Moore, C. E.

C. E. Moore, Atomic Energy Levels, Natl. Bur. Std. (US) Circ. 467(1952), Vol. II.

Persson, W.

W. Persson, J. Reader, “Spectrum and energy levels of Y vi,” J. Opt. Soc. Am. B 3, 959 (1986).
[CrossRef]

W. Persson, S. G. Pettersson, “4s24p3 and 4s 4p4 configurations in Kr iv, Rb v, and Sr vi,” Phys. Scr. 29, 308 (1984).
[CrossRef]

Pettersson, S. G.

Pettersson, S.-G.

A. Trigueiros, S.-G. Pettersson, J. G. Reyna Almandos, “Transitions within the n= 4 complex of Kr vii obtained from a theta-pinch light source,” Phys. Scr. 34, 164 (1986).
[CrossRef]

Pinnington, E. H.

E. H. Pinnington, J. L. Bahr, J. A. Kernahan, D. J. G. Irwin, “Beam-foil spectroscopy of As iii, iv, and v,” J. Phys. B 14, 1291 (1981).
[CrossRef]

Radziemski, L. J.

Optimization of the level values was done with the computer code elcalc written by L. J. Radziemski, Department of Physics, New Mexico State University, Las Cruces, N.M. 88003. The procedure and definition of the level value uncertainties are described by L. J. Radziemski, V. Kaufman, “Wavelengths, energy levels, and analysis of neutral atomic chlorine (Cl i)” J. Opt. Soc. Am. 59, 424 (1969).
[CrossRef]

Raineri, M.

Reader, J.

Reyna Almandos, J.

Reyna Almandos, J. G.

A. Trigueiros, S.-G. Pettersson, J. G. Reyna Almandos, “Transitions within the n= 4 complex of Kr vii obtained from a theta-pinch light source,” Phys. Scr. 34, 164 (1986).
[CrossRef]

Rhodes, C. K.

Ryabtsev, A.

Ryabtsev, A. N.

A. N. Ryabtsev, J. F. Wyart, Th. A. M. van Kleef, Y. N. Joshi, “Observation of autoionizing energy levels in the spectra of copper-like ions As v, Se vi and Br vii,” Phys. Scr. 30, 407 (1984).
[CrossRef]

J.-F. Wyart, Th. A. M. van Kleef, A. N. Ryabtsev, Y. N. Joshi, “Extended analysis of 3d–4p transitions in copper like ions of the sequence Ge3+–Mo13+,”, Phys. Scr. 29, 319 (1984).
[CrossRef]

Sapirstein, J.

W. R. Johnson, S. A. Blundell, J. Sapirstein, “Many-body perturbation theory calculations of energy levels along the copper isoelectronic sequence,” Phys. Rev. A (to be published).

Schectman, R. M.

A. E. Livingston, L. J. Curtis, R. M. Schectman, H. G. Berry, “Energies and lifetimes of excited states in copperlike Kr viii,” Phys. Rev. A 21, 771 (1980).
[CrossRef]

Schönheit, E.

E. Schönheit, “Die Spektren von hochionisiertem Neon, Argon, Krypton und Xenon einer neuen Lichtquelle für das Vakuum-Ultraviolet,” Optik (Stuttgart) 23, 409 (1966).

Svensson, L. ?.

J. O. Ekberg, L. Ȧ. Svensson, “Spectrum and term system of Ti xii,” Phys. Scr. 12, 116 (1975).
[CrossRef]

L. Ȧ. Svensson, J. O. Ekberg, “The titanium vacuum-spark spectrum from 50 to 425 Å,” Ark. Fys. 40, 145 (1969).

Swartz, M.

U. Feldman, M. Swartz, L. Cohen, “Vacuum ultraviolet source,” Rev. Sci. Instrum. 38, 1372 (1967).
[CrossRef]

Trigueiros, A.

A. Trigueiros, S.-G. Pettersson, J. G. Reyna Almandos, “Transitions within the n= 4 complex of Kr vii obtained from a theta-pinch light source,” Phys. Scr. 34, 164 (1986).
[CrossRef]

Trigueiros, A. G.

van Kleef, Th. A. M.

Y. N. Joshi, Th. A. M. van Kleef, “Revised and extended analysis of the 3d10nl configurations in As v, Se vi, and Br vii,” Can. J. Phys. 64, 330 (1986).
[CrossRef]

A. N. Ryabtsev, J. F. Wyart, Th. A. M. van Kleef, Y. N. Joshi, “Observation of autoionizing energy levels in the spectra of copper-like ions As v, Se vi and Br vii,” Phys. Scr. 30, 407 (1984).
[CrossRef]

J.-F. Wyart, Th. A. M. van Kleef, A. N. Ryabtsev, Y. N. Joshi, “Extended analysis of 3d–4p transitions in copper like ions of the sequence Ge3+–Mo13+,”, Phys. Scr. 29, 319 (1984).
[CrossRef]

Wilson, R.

B. C. Fawcett, B. B. Jones, R. Wilson, “Vacuum ultraviolet spectra of multiply ionized inert gases,” Proc. Phys. Soc. London 78, 1223 (1961).
[CrossRef]

Wyart, J. F.

A. N. Ryabtsev, J. F. Wyart, Th. A. M. van Kleef, Y. N. Joshi, “Observation of autoionizing energy levels in the spectra of copper-like ions As v, Se vi and Br vii,” Phys. Scr. 30, 407 (1984).
[CrossRef]

Wyart, J.-F.

J.-F. Wyart, Th. A. M. van Kleef, A. N. Ryabtsev, Y. N. Joshi, “Extended analysis of 3d–4p transitions in copper like ions of the sequence Ge3+–Mo13+,”, Phys. Scr. 29, 319 (1984).
[CrossRef]

J.-F. Wyart, J. Reader, A. Ryabtsev, “3d–4p transitions in the zinclike and copperlike ions Y x, xi; Zr xi, xii; Nb xii, xiii; and Mo xiii, xiv,” J. Opt. Soc. Am. 71, 692 (1981).
[CrossRef]

Appl. Opt.

Ark. Fys.

L. Ȧ. Svensson, J. O. Ekberg, “The titanium vacuum-spark spectrum from 50 to 425 Å,” Ark. Fys. 40, 145 (1969).

At. Data Nucl. Data Tables

K.-T. Cheng, Y.-K. Kim, “Energy levels, wavelengths, and transition probabilities for Cu-like ions,” At. Data Nucl. Data Tables 22, 547 (1978).
[CrossRef]

W. R. Johnson, D. Kolb, K.-N. Huang, “Electric–dipole, quadrupole, and magnetic–dipole susceptibilities and shielding factors for closed-shell ions of the He, Ne, Ar, Ni(Cu+), Kr, Pd, and Xe isoelectronic sequences,” At. Data Nucl. Data Tables 28, 333 (1983).
[CrossRef]

Atomic Energy Levels

C. E. Moore, Atomic Energy Levels, Natl. Bur. Std. (US) Circ. 467(1952), Vol. II.

Can. J. Phys.

Y. N. Joshi, Th. A. M. van Kleef, “Revised and extended analysis of the 3d10nl configurations in As v, Se vi, and Br vii,” Can. J. Phys. 64, 330 (1986).
[CrossRef]

Comput. Phys. Commun.

C. Froese Fischer, “A multi-configuration Hartree–Fock program with improved stability,” Comput. Phys. Commun. 4, 107 (1972).
[CrossRef]

J. Opt. Soc. Am.

J. Opt. Soc. Am. B

J. Phys. B

L. J. Curtis, D. G. Ellis, “A formula for cancellation disappearances of atomic oscillator strengths,” J. Phys. B 11, L543 (1978).
[CrossRef]

E. H. Pinnington, J. L. Bahr, J. A. Kernahan, D. J. G. Irwin, “Beam-foil spectroscopy of As iii, iv, and v,” J. Phys. B 14, 1291 (1981).
[CrossRef]

J. Phys. Chem. Ref. Data

R. L. Kelly, “Atomic and ionic spectrum lines below 2000 angstroms: hydrogen through krypton,” J. Phys. Chem. Ref. Data 16, Suppl. 1 (1987).

Optik (Stuttgart)

E. Schönheit, “Die Spektren von hochionisiertem Neon, Argon, Krypton und Xenon einer neuen Lichtquelle für das Vakuum-Ultraviolet,” Optik (Stuttgart) 23, 409 (1966).

Phys. Rev. A

A. E. Livingston, L. J. Curtis, R. M. Schectman, H. G. Berry, “Energies and lifetimes of excited states in copperlike Kr viii,” Phys. Rev. A 21, 771 (1980).
[CrossRef]

A. E. Livingston, S. J. Hinterlong, “Spectrum of Br vii,” Phys. Rev. A 23, 758 (1981).
[CrossRef]

U. Litzén, J. Reader, “Spectra and energy levels of ions in the zinc isoelectronic sequence from Rb viii to Mo xiii,” Phys. Rev. A 36, 5159 (1987).
[CrossRef]

Phys. Scr.

W. Persson, S. G. Pettersson, “4s24p3 and 4s 4p4 configurations in Kr iv, Rb v, and Sr vi,” Phys. Scr. 29, 308 (1984).
[CrossRef]

A. Trigueiros, S.-G. Pettersson, J. G. Reyna Almandos, “Transitions within the n= 4 complex of Kr vii obtained from a theta-pinch light source,” Phys. Scr. 34, 164 (1986).
[CrossRef]

J.-F. Wyart, Th. A. M. van Kleef, A. N. Ryabtsev, Y. N. Joshi, “Extended analysis of 3d–4p transitions in copper like ions of the sequence Ge3+–Mo13+,”, Phys. Scr. 29, 319 (1984).
[CrossRef]

A. N. Ryabtsev, J. F. Wyart, Th. A. M. van Kleef, Y. N. Joshi, “Observation of autoionizing energy levels in the spectra of copper-like ions As v, Se vi and Br vii,” Phys. Scr. 30, 407 (1984).
[CrossRef]

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[CrossRef]

U. Litzén, J. Reader, “4s24p2–4s 4p3 transition array and energy levels of the germanium-like ions Rb vi–Mo xi,” Phys. Scr. 39, 468 (1989).
[CrossRef]

U. Litzén, J. Reader, “Spectra and energy levels of the galliumlike ions Rb vii–Mo xii,” Phys. Scr. 39, 73 (1989).
[CrossRef]

Proc. Phys. Soc. London

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[CrossRef]

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[CrossRef]

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U. Feldman, M. Swartz, L. Cohen, “Vacuum ultraviolet source,” Rev. Sci. Instrum. 38, 1372 (1967).
[CrossRef]

Other

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B. Cardon, MIT Lincoln Laboratory, P.O. Box 73, Lexington, Mass. 02173-9108 (personal communication to J. Reader, 1978).

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Optimization of the level values was done with the computer code elcalc written by L. J. Radziemski, Department of Physics, New Mexico State University, Las Cruces, N.M. 88003. The procedure and definition of the level value uncertainties are described by L. J. Radziemski, V. Kaufman, “Wavelengths, energy levels, and analysis of neutral atomic chlorine (Cl i)” J. Opt. Soc. Am. 59, 424 (1969).
[CrossRef]

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Figures (4)

Fig. 1
Fig. 1

Grotrian diagram for Kr viii. Wavelengths are in angstroms. Intensities are indicated in parentheses following the wavelengths. Wavelengths and intensities of lines above 1000 Å (given to two decimal places) are those of Gallardo et al.8

Fig. 2
Fig. 2

Isoelectronic comparison of the energies of 4f–5g transitions from Zn ii to Mo xiv. σ is the average wave number of the two strong 4f–5g transitions. The value for Kr viii from Ref. 4 is indicate ed by an ×. The calculated values of Cheng and Kim28 are plotted in the lower curve. Zc is the net charge of the atomic core. References: Zn ii: A. M. Crooker and K. A. Dick, Can. J. Phys. 46, 1241 (1968); Ga iii: B. Isberg and U. Litzén Phys. Scr. 33, 420 (1986); Ge iv: R. J. Lang, Phys. Rev. 34, 697 (1929); As v, Se vi, Br vii: Y. N. Joshi and Th. A. M. van Kleef, Can. J. Phys. 64, 330 (1986); Kr viii: present work; Sr x: N. Acquista and J. Reader, J. Opt. Soc. Am. 71, 569 (1981); Y xi: J. Reader and N. Acquista, J. Opt. Soc. Am. 69, 1285 (1979); Zr xii: J. Reader and N. Acquista, J. Opt. Soc. Am. 69, 1659 (1979); Nb xiii: J. Reader and N. Acquista, J. Opt. Soc. Am. 70, 317 (1980); Mo xiv: J. Reader, G. Luther, and N. Acquista, J. Opt. Soc. Am. 69, 144 (1979).

Fig. 3
Fig. 3

Plot of the 4f2F∘ fine-structure interval from Ga iii to Nb xiii. The Dirac–Fock values are those of Cheng and Kim.23 Zc is the net charge of the atomic core.

Fig. 4
Fig. 4

Spectrum of krypton in the low-inductance spark observed with 10.7-m grazing-incidence spectrograph. Wavelengths are in angstroms. The voltage was 4 kV Identified lines of Kr viii are indicated to the left. Lines with capital letters are 3d104s–3d94s4p transitions; lines with lowercase letters are 3d104p–3d94p2 transitions. Lines indicated as 7p and 8p are transitions to 3d104s from the 3d107p and 3d108p configurations.

Tables (10)

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Table 1 Observed Lines of One-Electron Spectrum of Kr viii

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Table 2 One-Electron Energy Levels of Kr viii

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Table 3 Wavelengths of Selected Lines of Kr viii Calculated from Optimized Level Values

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Table 4 Observed 3d104s–3d94s4p and 3d104p–3d94p2 Transitions of Kr viii

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Table 5 3d94s4p Energy Levels of Kr viii

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Table 6 3d94p2 Energy Levels of Kr viii

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Table 7 Energy Parameters (in cm−1) and Mean Errors Δ of Least-Squares Fits for the 3d94s4p and 3d94p2 + 3d94s4d Configurations of Kr viii

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Table 8 Values for the Ionization Energy of Kr viii Determined from Various Seriesa

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Table 9 Wavelengths of the 3d10–3d94p, 4f Resonance Transitions of Kr ix

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Table 10 J = 1 Energy Levels of the 3d94p and 3d94f Configurations of Kr ix

Equations (3)

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n - n * = a + b T + c T 2 .
Δ n * ( 5 f - 4 f ) = 0.9818.
E ( n l ) = I 0 - T H ( n l ) - α d r - 4 n l - α q r - 6 n l ,

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