Abstract

Two different spectroscopy light sources are used to observe the spectrum of six-times-ionized argon, Ar vii, in the vacuum ultraviolet range, 300–1100 Å. Fifty-eight transitions are identified as combinations between levels of the 2p6 (3s2+3p2+3s3d) and 2p6(3s3p+3p3d+3s4p) configurations. For 44 of these transitions the classification is new. Twenty-nine levels are determined that belong to these configurations, where 14 of these are new. The energy parameters are obtained with Hartree–Fock relativistic calculations. The energy levels of the configurations are interpreted by fitting the theoretical energy expressions to the experimental levels with the least-squares approach. Isoelectronic comparisons along the Mg i sequence are used to support the experimental results.

© 1997 Optical Society of America

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    [Crossref]
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    [Crossref]
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    [Crossref]
  31. K. Aashamar, T. M. Luke, and J. D. Talman, “Energy levels in the magnesium sequence, Mg i–Mn xiv, calculated in the multiconfiguration optimized potential model,” Phys. Scr. 34, 386–393 (1986).
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    [Crossref]
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    [Crossref]
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    [Crossref]
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    [Crossref]
  41. E. Träbert, R. Hutton, L. Engström, S. L. Bliman, H. G. Berry, and C. Kurtz, “Delayed beam–foil spectra of 3 MeV Ar ions,” Phys. Lett. A 129, 381–385 (1988).
    [Crossref]
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  45. S. Bliman, J. P. Desclaux, D. Hitz, P. Indelicato, and P. Marseille, “Collision aspects and spectroscopy of higher states in magnesium-like argon,” Nucl. Instr. Methods Phys. Res. B 31, 330–335 (1988).
    [Crossref]
  46. S. Bliman, P. Indelicato, D. Hitz, P. Marseille, and J. P. Desclaux, “One-electron and two-electron-one photon electric dipole transitions in the Mg-Like argon spectrum,” J. Phys. B 22, 2741–2749 (1989).
    [Crossref]
  47. P. Boduch, M. Chantepie, D. Hennecart, X. Husson, H. Kucal, D. Lecler, and N. Stolterfoht, “Spectroscopic analysis of visible and near UV light emitted by Ar7+ and Ar6+ ions produced in Ar8+–He and Ar8+–H2 collisions at 120 keV,” Phys. Scr. 45, 203–211 (1992).
    [Crossref]
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1993 (1)

K. Rahimullah, P. Tavella, C. Novero, and A. Godone, “A semi-theoretical calculation of 3s3p fine-structure splitting in Mg i using asymptotic value of quantum defect,” Nuovo Cimento 15, 1113–1121 (1993).

1992 (1)

P. Boduch, M. Chantepie, D. Hennecart, X. Husson, H. Kucal, D. Lecler, and N. Stolterfoht, “Spectroscopic analysis of visible and near UV light emitted by Ar7+ and Ar6+ ions produced in Ar8+–He and Ar8+–H2 collisions at 120 keV,” Phys. Scr. 45, 203–211 (1992).
[Crossref]

1991 (1)

J.-O. Ekberg, U. Feldman, J. F. Seely, C. M. Brown, B. J. MacGowan, D. R. Kania, and C. J. Keane, “Analysis of magnesiumlike spectra from Mo xxxi to Cs xliv,” Phys. Scr. 43, 19–32 (1991).
[Crossref]

1990 (1)

C. Jupén, B. Denne, and I. Martinson, “Transitions in Al-like, Mg-like and Na-like Kr and Mo, observed inthe JET Tokamak,” Phys. Scr. 41, 669–674 (1990).
[Crossref]

1989 (7)

T. Brage and A. Hibbert, “Plunging configurations and J-dependent lifetimes in Mg-like ions,” J. Phys. B 22, 713–726 (1989).
[Crossref]

A. G. Trigueiros, M. Machida, C. J. B. Pagan, and J. G. Reyna Almandos, “A spectroscopic study of radiation produced in a theta-pinch,” Nucl. Instr. Methods Phys. Res. A 280, 589–592 (1989).
[Crossref]

M. Gallardo, F. Bredice, M. Raineri, and J. G. Reyna Almandos, “Light source for obtaining spectra of highly ionized gases,” Appl. Opt. 28, 4513–4515 (1989).
[Crossref] [PubMed]

V. E. Levashov, “Spectra of n=3–n′=3 transitions in K viii, Ca ix,and Ti xi magnesium-like ions,” Opt. Spectrosc. 66, 449–451 (1989).

S. S. Churilov, V. E. Levashov, and J. F. Wyart, “Extended analysis of the 3d2–3p3d transitions in the sequence K viii–Cu xviii and isoelectronic trends in Ma-like ions through Kr xxv,” Phys. Scr. 40, 625–633 (1989).
[Crossref]

J. Sugar, V. Kaufman, P. Indelicato, and W. L. Rowan, “Analysis of magnesium spectra from Cu xviii to Mo xxxi,” J. Opt. Soc. Am. B 6, 1437–1443 (1989).
[Crossref]

S. Bliman, P. Indelicato, D. Hitz, P. Marseille, and J. P. Desclaux, “One-electron and two-electron-one photon electric dipole transitions in the Mg-Like argon spectrum,” J. Phys. B 22, 2741–2749 (1989).
[Crossref]

1988 (5)

S. Bliman, J. P. Desclaux, D. Hitz, P. Indelicato, and P. Marseille, “Collision aspects and spectroscopy of higher states in magnesium-like argon,” Nucl. Instr. Methods Phys. Res. B 31, 330–335 (1988).
[Crossref]

E. Träbert, R. Hutton, L. Engström, S. L. Bliman, H. G. Berry, and C. Kurtz, “Delayed beam–foil spectra of 3 MeV Ar ions,” Phys. Lett. A 129, 381–385 (1988).
[Crossref]

I. Lesteven-Vaı̈sse, F. Folkmann, A. Ben Sitel, M. Chantepie, and D. Lecler, “High resolution V. U. V. spectroscopy of argon recoil ions inducedby an ion beam,” Phys. Scr. 38, 45–54 (1988).
[Crossref]

J. Sugar and V. Kaufman, “Additions and revisions to the levels of magnesium-like Cu xviii and Zn xix,” J. Opt. Soc. Am. B 4, 2010–2011 (1988).
[Crossref]

A. Redfors, “The 3d2 configuration in Ca ix–Zn xix,” Phys. Scr. 38, 702–706 (1988).
[Crossref]

1987 (6)

J. Sugar, V. Kaufman, and W. L. Rowan, “Resonances transitions in the Mg i and Ar i isoelectronic sequences from Cu to Mo,” J. Opt. Soc. Am. B 4, 1927–1930 (1987).
[Crossref]

A. Hibbert and F. P. Keenan, “Oscillator strengths for intercombination and forbidden transitions amongst the 3s2 and 3s3p levels in Al ii,” J. Phys. B 20, 4693–4697 (1987).
[Crossref]

K. L. Baluja and M. Mohan, “Electron impact excitation of forbidden and allowed transitions in Cl vi,” J. Phys. B 20, 831–838 (1987).
[Crossref]

U. Litzén and A. Redfors, “Revised and extended analysis of transitions and energy levels in the n=3 complex of Mg-like Ca ix–Ge xxi,” Phys. Scr. 36, 895–903 (1987).
[Crossref]

B. C. Fawcett, A. Ridgeley, and G. E. Bromage, “The spectrum Ar ix and extended spectral classification in Ar v to Ar viii and Ar x,” Phys. Scr. 18, 315–322 (1987).
[Crossref]

R. L. Kelly, “Atomic and ionic spectrum lines below 2000 Å: hydrogen trough krypton, part I (H–Ar),” J. Phys. Chem. Ref. Data Suppl. 1, 401–408 (1987).

1986 (4)

B. C. Fawcett, “Calculated oscillator strengths, wavelengths and energy levels for allowed 3–3 and 3–4 transitions for Fe xv with isoelectronic comparisons between Dirac–Fock and Hartree–Fock,” Phys. Scr. 34, 331–336 (1986).
[Crossref]

K. Aashamar, T. M. Luke, and J. D. Talman, “Energy levels in the magnesium sequence, Mg i–Mn xiv, calculated in the multiconfiguration optimized potential model,” Phys. Scr. 34, 386–393 (1986).
[Crossref]

J. Sugar and V. Kaufman, “Copper spectra in a laser-generated plasma: measurements and classifications of Cu xii to Cu xxi,” J. Opt. Soc. Am. B 3, 704–710 (1986).
[Crossref]

J. Sugar and V. Kaufman, “Mg-like spectrum of Cu xviii,” J. Opt. Soc. Am. B 3, 1612–1612 (1986).
[Crossref]

1985 (2)

K. L. Baluja and A. Hibbert, “Energies and oscillator strengths for allowed transitions in S v, Cl vi, and Fe xv,” Nucl. Instr. Methods Phys. Res. B 9, 477–486 (1985).
[Crossref]

S. S. Churilov, E. Y. Kononov, A. H. Ryabtsev, and Y. F. Zayikin, “A detailed analysis of the n=3–n′=3 transitions in the Mg-like ions Fe xv, Co xvi, and Ni xvii,” Phys. Scr. 32, 501–503 (1985).
[Crossref]

1984 (3)

N. Reistad, T. Brage, J.-O. Ekberg, and L. Engström, “J-dependent 3s4p 3Pj lifetimes in Mg-like sulfur and chlorine,” Phys. Scr. 30, 249–254 (1984).
[Crossref]

G. Lèvêque, S. Girard, and J. Robin, “Emission spectrum of highly ionized argon in the 100 to 900 Å range,” J. Phys. 45, 665–670 (1984).

N. J. Peacock, M. F. Stamp, and J. D. Silver, “Highly-ionized atoms in fusion research plasma,” Phys. Scr. T8, 10–20 (1984).
[Crossref]

1983 (3)

1982 (3)

C. Froese-Fischer and M. Godefroid, “Lifetime trends for the n=3 singlet states in the Mg sequence,” Nucl. Instr. Methods Phys. Res. 202, 307–322 (1982).
[Crossref]

C. Froese-Fischer and M. Godefroid, “Short-range interactions involving plunging configurations of the n=3 complex in the Mg sequence,” Phys. Scr. 25, 394–400 (1982).
[Crossref]

M.-C. Buchet-Poulizac, J. P. Buchet, and P. Ceyzeriat, “Spectroscopie et durees de vie dans Ar vi–viii,” Nucl. Instr. Methods Phys. Res. 202, 13–18 (1982).
[Crossref]

1981 (2)

1977 (1)

P.-O. Zetterberg and C.-E. Magnusson, “The spectrum and term system of P iv,” Phys. Scr. 15, 189–201 (1977).
[Crossref]

1971 (1)

J.-O. Ekberg, “Analyses of the Mg i-like spectra K viii, Ca ix, Sc x and Ti xi,” Phys. Scr. 4, 101–109 (1971).
[Crossref]

1969 (1)

1941 (1)

L. W. Philips and W. L. Parker, “Spectra of argon in the extreme ultraviolet,” Phys. Rev. 60, 301–307 (1941).
[Crossref]

Aashamar, K.

K. Aashamar, T. M. Luke, and J. D. Talman, “Energy levels in the magnesium sequence, Mg i–Mn xiv, calculated in the multiconfiguration optimized potential model,” Phys. Scr. 34, 386–393 (1986).
[Crossref]

Andersson, Ö.

Ö. Andersson, “A method for atomic spectroscopy of highly charged ions in the Pm isoelectronic sequence,” Master’s Thesis (University of Lund, Lund, Sweden, 1995).

Baluja, K. L.

K. L. Baluja and M. Mohan, “Electron impact excitation of forbidden and allowed transitions in Cl vi,” J. Phys. B 20, 831–838 (1987).
[Crossref]

K. L. Baluja and A. Hibbert, “Energies and oscillator strengths for allowed transitions in S v, Cl vi, and Fe xv,” Nucl. Instr. Methods Phys. Res. B 9, 477–486 (1985).
[Crossref]

Ben Sitel, A.

I. Lesteven-Vaı̈sse, F. Folkmann, A. Ben Sitel, M. Chantepie, and D. Lecler, “High resolution V. U. V. spectroscopy of argon recoil ions inducedby an ion beam,” Phys. Scr. 38, 45–54 (1988).
[Crossref]

Berry, H. G.

E. Träbert, R. Hutton, L. Engström, S. L. Bliman, H. G. Berry, and C. Kurtz, “Delayed beam–foil spectra of 3 MeV Ar ions,” Phys. Lett. A 129, 381–385 (1988).
[Crossref]

Bliman, S.

S. Bliman, P. Indelicato, D. Hitz, P. Marseille, and J. P. Desclaux, “One-electron and two-electron-one photon electric dipole transitions in the Mg-Like argon spectrum,” J. Phys. B 22, 2741–2749 (1989).
[Crossref]

S. Bliman, J. P. Desclaux, D. Hitz, P. Indelicato, and P. Marseille, “Collision aspects and spectroscopy of higher states in magnesium-like argon,” Nucl. Instr. Methods Phys. Res. B 31, 330–335 (1988).
[Crossref]

Bliman, S. L.

E. Träbert, R. Hutton, L. Engström, S. L. Bliman, H. G. Berry, and C. Kurtz, “Delayed beam–foil spectra of 3 MeV Ar ions,” Phys. Lett. A 129, 381–385 (1988).
[Crossref]

Boduch, P.

P. Boduch, M. Chantepie, D. Hennecart, X. Husson, H. Kucal, D. Lecler, and N. Stolterfoht, “Spectroscopic analysis of visible and near UV light emitted by Ar7+ and Ar6+ ions produced in Ar8+–He and Ar8+–H2 collisions at 120 keV,” Phys. Scr. 45, 203–211 (1992).
[Crossref]

Brage, T.

T. Brage and A. Hibbert, “Plunging configurations and J-dependent lifetimes in Mg-like ions,” J. Phys. B 22, 713–726 (1989).
[Crossref]

N. Reistad, T. Brage, J.-O. Ekberg, and L. Engström, “J-dependent 3s4p 3Pj lifetimes in Mg-like sulfur and chlorine,” Phys. Scr. 30, 249–254 (1984).
[Crossref]

Bredice, F.

Bromage, G. E.

B. C. Fawcett, A. Ridgeley, and G. E. Bromage, “The spectrum Ar ix and extended spectral classification in Ar v to Ar viii and Ar x,” Phys. Scr. 18, 315–322 (1987).
[Crossref]

Brooks, R. L.

Brown, C. M.

J.-O. Ekberg, U. Feldman, J. F. Seely, C. M. Brown, B. J. MacGowan, D. R. Kania, and C. J. Keane, “Analysis of magnesiumlike spectra from Mo xxxi to Cs xliv,” Phys. Scr. 43, 19–32 (1991).
[Crossref]

Buchet, J. P.

M.-C. Buchet-Poulizac, J. P. Buchet, and P. Ceyzeriat, “Spectroscopie et durees de vie dans Ar vi–viii,” Nucl. Instr. Methods Phys. Res. 202, 13–18 (1982).
[Crossref]

Buchet-Poulizac, M.-C.

M.-C. Buchet-Poulizac, J. P. Buchet, and P. Ceyzeriat, “Spectroscopie et durees de vie dans Ar vi–viii,” Nucl. Instr. Methods Phys. Res. 202, 13–18 (1982).
[Crossref]

Ceyzeriat, P.

M.-C. Buchet-Poulizac, J. P. Buchet, and P. Ceyzeriat, “Spectroscopie et durees de vie dans Ar vi–viii,” Nucl. Instr. Methods Phys. Res. 202, 13–18 (1982).
[Crossref]

Chantepie, M.

P. Boduch, M. Chantepie, D. Hennecart, X. Husson, H. Kucal, D. Lecler, and N. Stolterfoht, “Spectroscopic analysis of visible and near UV light emitted by Ar7+ and Ar6+ ions produced in Ar8+–He and Ar8+–H2 collisions at 120 keV,” Phys. Scr. 45, 203–211 (1992).
[Crossref]

I. Lesteven-Vaı̈sse, F. Folkmann, A. Ben Sitel, M. Chantepie, and D. Lecler, “High resolution V. U. V. spectroscopy of argon recoil ions inducedby an ion beam,” Phys. Scr. 38, 45–54 (1988).
[Crossref]

Churilov, S. S.

S. S. Churilov, V. E. Levashov, and J. F. Wyart, “Extended analysis of the 3d2–3p3d transitions in the sequence K viii–Cu xviii and isoelectronic trends in Ma-like ions through Kr xxv,” Phys. Scr. 40, 625–633 (1989).
[Crossref]

S. S. Churilov, E. Y. Kononov, A. H. Ryabtsev, and Y. F. Zayikin, “A detailed analysis of the n=3–n′=3 transitions in the Mg-like ions Fe xv, Co xvi, and Ni xvii,” Phys. Scr. 32, 501–503 (1985).
[Crossref]

Cowan, R. D.

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

Curtis, L.

Denne, B.

C. Jupén, B. Denne, and I. Martinson, “Transitions in Al-like, Mg-like and Na-like Kr and Mo, observed inthe JET Tokamak,” Phys. Scr. 41, 669–674 (1990).
[Crossref]

Desclaux, J. P.

S. Bliman, P. Indelicato, D. Hitz, P. Marseille, and J. P. Desclaux, “One-electron and two-electron-one photon electric dipole transitions in the Mg-Like argon spectrum,” J. Phys. B 22, 2741–2749 (1989).
[Crossref]

S. Bliman, J. P. Desclaux, D. Hitz, P. Indelicato, and P. Marseille, “Collision aspects and spectroscopy of higher states in magnesium-like argon,” Nucl. Instr. Methods Phys. Res. B 31, 330–335 (1988).
[Crossref]

Edlén, B.

B. Edlén, in Encyclopedia of Physics, S. Flügge, ed. (Springer, Berlin, 1964), Vol. 27, p. 80.

Ekberg, J.-O.

J.-O. Ekberg, U. Feldman, J. F. Seely, C. M. Brown, B. J. MacGowan, D. R. Kania, and C. J. Keane, “Analysis of magnesiumlike spectra from Mo xxxi to Cs xliv,” Phys. Scr. 43, 19–32 (1991).
[Crossref]

N. Reistad, T. Brage, J.-O. Ekberg, and L. Engström, “J-dependent 3s4p 3Pj lifetimes in Mg-like sulfur and chlorine,” Phys. Scr. 30, 249–254 (1984).
[Crossref]

J.-O. Ekberg, “Analyses of the Mg i-like spectra K viii, Ca ix, Sc x and Ti xi,” Phys. Scr. 4, 101–109 (1971).
[Crossref]

Engström, L.

E. Träbert, R. Hutton, L. Engström, S. L. Bliman, H. G. Berry, and C. Kurtz, “Delayed beam–foil spectra of 3 MeV Ar ions,” Phys. Lett. A 129, 381–385 (1988).
[Crossref]

N. Reistad, T. Brage, J.-O. Ekberg, and L. Engström, “J-dependent 3s4p 3Pj lifetimes in Mg-like sulfur and chlorine,” Phys. Scr. 30, 249–254 (1984).
[Crossref]

Fawcett, B. C.

B. C. Fawcett, A. Ridgeley, and G. E. Bromage, “The spectrum Ar ix and extended spectral classification in Ar v to Ar viii and Ar x,” Phys. Scr. 18, 315–322 (1987).
[Crossref]

B. C. Fawcett, “Calculated oscillator strengths, wavelengths and energy levels for allowed 3–3 and 3–4 transitions for Fe xv with isoelectronic comparisons between Dirac–Fock and Hartree–Fock,” Phys. Scr. 34, 331–336 (1986).
[Crossref]

B. C. Fawcett, “Calculated oscillator strengths and wavelengths for allowed transitions within the third shell for ions in the Mg-like isoelectronic sequence between S v and Ni xvii,” At. Data Nucl. Data Tables 28, 579–596 (1983).
[Crossref]

Feldman, U.

J.-O. Ekberg, U. Feldman, J. F. Seely, C. M. Brown, B. J. MacGowan, D. R. Kania, and C. J. Keane, “Analysis of magnesiumlike spectra from Mo xxxi to Cs xliv,” Phys. Scr. 43, 19–32 (1991).
[Crossref]

Folkmann, F.

I. Lesteven-Vaı̈sse, F. Folkmann, A. Ben Sitel, M. Chantepie, and D. Lecler, “High resolution V. U. V. spectroscopy of argon recoil ions inducedby an ion beam,” Phys. Scr. 38, 45–54 (1988).
[Crossref]

Froese-Fischer, C.

C. Froese-Fischer and M. Godefroid, “Lifetime trends for the n=3 singlet states in the Mg sequence,” Nucl. Instr. Methods Phys. Res. 202, 307–322 (1982).
[Crossref]

C. Froese-Fischer and M. Godefroid, “Short-range interactions involving plunging configurations of the n=3 complex in the Mg sequence,” Phys. Scr. 25, 394–400 (1982).
[Crossref]

Gallardo, M.

Girard, S.

G. Lèvêque, S. Girard, and J. Robin, “Emission spectrum of highly ionized argon in the 100 to 900 Å range,” J. Phys. 45, 665–670 (1984).

Godefroid, M.

C. Froese-Fischer and M. Godefroid, “Short-range interactions involving plunging configurations of the n=3 complex in the Mg sequence,” Phys. Scr. 25, 394–400 (1982).
[Crossref]

C. Froese-Fischer and M. Godefroid, “Lifetime trends for the n=3 singlet states in the Mg sequence,” Nucl. Instr. Methods Phys. Res. 202, 307–322 (1982).
[Crossref]

Godone, A.

K. Rahimullah, P. Tavella, C. Novero, and A. Godone, “A semi-theoretical calculation of 3s3p fine-structure splitting in Mg i using asymptotic value of quantum defect,” Nuovo Cimento 15, 1113–1121 (1993).

Hennecart, D.

P. Boduch, M. Chantepie, D. Hennecart, X. Husson, H. Kucal, D. Lecler, and N. Stolterfoht, “Spectroscopic analysis of visible and near UV light emitted by Ar7+ and Ar6+ ions produced in Ar8+–He and Ar8+–H2 collisions at 120 keV,” Phys. Scr. 45, 203–211 (1992).
[Crossref]

Hibbert, A.

T. Brage and A. Hibbert, “Plunging configurations and J-dependent lifetimes in Mg-like ions,” J. Phys. B 22, 713–726 (1989).
[Crossref]

A. Hibbert and F. P. Keenan, “Oscillator strengths for intercombination and forbidden transitions amongst the 3s2 and 3s3p levels in Al ii,” J. Phys. B 20, 4693–4697 (1987).
[Crossref]

K. L. Baluja and A. Hibbert, “Energies and oscillator strengths for allowed transitions in S v, Cl vi, and Fe xv,” Nucl. Instr. Methods Phys. Res. B 9, 477–486 (1985).
[Crossref]

Hitz, D.

S. Bliman, P. Indelicato, D. Hitz, P. Marseille, and J. P. Desclaux, “One-electron and two-electron-one photon electric dipole transitions in the Mg-Like argon spectrum,” J. Phys. B 22, 2741–2749 (1989).
[Crossref]

S. Bliman, J. P. Desclaux, D. Hitz, P. Indelicato, and P. Marseille, “Collision aspects and spectroscopy of higher states in magnesium-like argon,” Nucl. Instr. Methods Phys. Res. B 31, 330–335 (1988).
[Crossref]

Husson, X.

P. Boduch, M. Chantepie, D. Hennecart, X. Husson, H. Kucal, D. Lecler, and N. Stolterfoht, “Spectroscopic analysis of visible and near UV light emitted by Ar7+ and Ar6+ ions produced in Ar8+–He and Ar8+–H2 collisions at 120 keV,” Phys. Scr. 45, 203–211 (1992).
[Crossref]

Hutton, R.

E. Träbert, R. Hutton, L. Engström, S. L. Bliman, H. G. Berry, and C. Kurtz, “Delayed beam–foil spectra of 3 MeV Ar ions,” Phys. Lett. A 129, 381–385 (1988).
[Crossref]

R. Hutton, University of Lund, 22362 Lund, Sweden (personal communication, 1997).

Indelicato, P.

S. Bliman, P. Indelicato, D. Hitz, P. Marseille, and J. P. Desclaux, “One-electron and two-electron-one photon electric dipole transitions in the Mg-Like argon spectrum,” J. Phys. B 22, 2741–2749 (1989).
[Crossref]

J. Sugar, V. Kaufman, P. Indelicato, and W. L. Rowan, “Analysis of magnesium spectra from Cu xviii to Mo xxxi,” J. Opt. Soc. Am. B 6, 1437–1443 (1989).
[Crossref]

S. Bliman, J. P. Desclaux, D. Hitz, P. Indelicato, and P. Marseille, “Collision aspects and spectroscopy of higher states in magnesium-like argon,” Nucl. Instr. Methods Phys. Res. B 31, 330–335 (1988).
[Crossref]

Irwin, D. J. G.

Joelsson, I.

I. Joelsson, P.-O. Zetterberg, and C.-E. Magnusson, “The spectrum and term system of S v,” Phys. Scr. 23, 1087–1095 (1981).
[Crossref]

Jupén, C.

C. Jupén, B. Denne, and I. Martinson, “Transitions in Al-like, Mg-like and Na-like Kr and Mo, observed inthe JET Tokamak,” Phys. Scr. 41, 669–674 (1990).
[Crossref]

Kania, D. R.

J.-O. Ekberg, U. Feldman, J. F. Seely, C. M. Brown, B. J. MacGowan, D. R. Kania, and C. J. Keane, “Analysis of magnesiumlike spectra from Mo xxxi to Cs xliv,” Phys. Scr. 43, 19–32 (1991).
[Crossref]

Kaufman, V.

Keane, C. J.

J.-O. Ekberg, U. Feldman, J. F. Seely, C. M. Brown, B. J. MacGowan, D. R. Kania, and C. J. Keane, “Analysis of magnesiumlike spectra from Mo xxxi to Cs xliv,” Phys. Scr. 43, 19–32 (1991).
[Crossref]

Keenan, F. P.

A. Hibbert and F. P. Keenan, “Oscillator strengths for intercombination and forbidden transitions amongst the 3s2 and 3s3p levels in Al ii,” J. Phys. B 20, 4693–4697 (1987).
[Crossref]

Kelly, R. L.

R. L. Kelly, “Atomic and ionic spectrum lines below 2000 Å: hydrogen trough krypton, part I (H–Ar),” J. Phys. Chem. Ref. Data Suppl. 1, 401–408 (1987).

Kernahan, J. A.

Kononov, E. Y.

S. S. Churilov, E. Y. Kononov, A. H. Ryabtsev, and Y. F. Zayikin, “A detailed analysis of the n=3–n′=3 transitions in the Mg-like ions Fe xv, Co xvi, and Ni xvii,” Phys. Scr. 32, 501–503 (1985).
[Crossref]

Kucal, H.

P. Boduch, M. Chantepie, D. Hennecart, X. Husson, H. Kucal, D. Lecler, and N. Stolterfoht, “Spectroscopic analysis of visible and near UV light emitted by Ar7+ and Ar6+ ions produced in Ar8+–He and Ar8+–H2 collisions at 120 keV,” Phys. Scr. 45, 203–211 (1992).
[Crossref]

Kurtz, C.

E. Träbert, R. Hutton, L. Engström, S. L. Bliman, H. G. Berry, and C. Kurtz, “Delayed beam–foil spectra of 3 MeV Ar ions,” Phys. Lett. A 129, 381–385 (1988).
[Crossref]

Lecler, D.

P. Boduch, M. Chantepie, D. Hennecart, X. Husson, H. Kucal, D. Lecler, and N. Stolterfoht, “Spectroscopic analysis of visible and near UV light emitted by Ar7+ and Ar6+ ions produced in Ar8+–He and Ar8+–H2 collisions at 120 keV,” Phys. Scr. 45, 203–211 (1992).
[Crossref]

I. Lesteven-Vaı̈sse, F. Folkmann, A. Ben Sitel, M. Chantepie, and D. Lecler, “High resolution V. U. V. spectroscopy of argon recoil ions inducedby an ion beam,” Phys. Scr. 38, 45–54 (1988).
[Crossref]

Lesteven-Vai¨sse, I.

I. Lesteven-Vaı̈sse, F. Folkmann, A. Ben Sitel, M. Chantepie, and D. Lecler, “High resolution V. U. V. spectroscopy of argon recoil ions inducedby an ion beam,” Phys. Scr. 38, 45–54 (1988).
[Crossref]

Levashov, V. E.

S. S. Churilov, V. E. Levashov, and J. F. Wyart, “Extended analysis of the 3d2–3p3d transitions in the sequence K viii–Cu xviii and isoelectronic trends in Ma-like ions through Kr xxv,” Phys. Scr. 40, 625–633 (1989).
[Crossref]

V. E. Levashov, “Spectra of n=3–n′=3 transitions in K viii, Ca ix,and Ti xi magnesium-like ions,” Opt. Spectrosc. 66, 449–451 (1989).

Lèvêque, G.

G. Lèvêque, S. Girard, and J. Robin, “Emission spectrum of highly ionized argon in the 100 to 900 Å range,” J. Phys. 45, 665–670 (1984).

Litzén, U.

U. Litzén and A. Redfors, “Revised and extended analysis of transitions and energy levels in the n=3 complex of Mg-like Ca ix–Ge xxi,” Phys. Scr. 36, 895–903 (1987).
[Crossref]

Livingston, A. E.

Luke, T. M.

K. Aashamar, T. M. Luke, and J. D. Talman, “Energy levels in the magnesium sequence, Mg i–Mn xiv, calculated in the multiconfiguration optimized potential model,” Phys. Scr. 34, 386–393 (1986).
[Crossref]

MacGowan, B. J.

J.-O. Ekberg, U. Feldman, J. F. Seely, C. M. Brown, B. J. MacGowan, D. R. Kania, and C. J. Keane, “Analysis of magnesiumlike spectra from Mo xxxi to Cs xliv,” Phys. Scr. 43, 19–32 (1991).
[Crossref]

Machida, M.

A. G. Trigueiros, M. Machida, C. J. B. Pagan, and J. G. Reyna Almandos, “A spectroscopic study of radiation produced in a theta-pinch,” Nucl. Instr. Methods Phys. Res. A 280, 589–592 (1989).
[Crossref]

Magnusson, C.-E.

I. Joelsson, P.-O. Zetterberg, and C.-E. Magnusson, “The spectrum and term system of S v,” Phys. Scr. 23, 1087–1095 (1981).
[Crossref]

P.-O. Zetterberg and C.-E. Magnusson, “The spectrum and term system of P iv,” Phys. Scr. 15, 189–201 (1977).
[Crossref]

Mania, A. J.

A. G. Trigueiros and A. J. Mania, , “Hartree–Fock and fit energy parameters for the Ar vii spectrum,” 2, 1996 (UNICAMP, São Paulo, Brazil).

Marseille, P.

S. Bliman, P. Indelicato, D. Hitz, P. Marseille, and J. P. Desclaux, “One-electron and two-electron-one photon electric dipole transitions in the Mg-Like argon spectrum,” J. Phys. B 22, 2741–2749 (1989).
[Crossref]

S. Bliman, J. P. Desclaux, D. Hitz, P. Indelicato, and P. Marseille, “Collision aspects and spectroscopy of higher states in magnesium-like argon,” Nucl. Instr. Methods Phys. Res. B 31, 330–335 (1988).
[Crossref]

Martinson, I.

C. Jupén, B. Denne, and I. Martinson, “Transitions in Al-like, Mg-like and Na-like Kr and Mo, observed inthe JET Tokamak,” Phys. Scr. 41, 669–674 (1990).
[Crossref]

Mohan, M.

K. L. Baluja and M. Mohan, “Electron impact excitation of forbidden and allowed transitions in Cl vi,” J. Phys. B 20, 831–838 (1987).
[Crossref]

Moore, C. E.

C. E. Moore, “Atomic Energy Levels,” (U.S. GOP, Washington, D.C., 1971), Vol. I and Vol. II.

Novero, C.

K. Rahimullah, P. Tavella, C. Novero, and A. Godone, “A semi-theoretical calculation of 3s3p fine-structure splitting in Mg i using asymptotic value of quantum defect,” Nuovo Cimento 15, 1113–1121 (1993).

Pagan, C. J. B.

A. G. Trigueiros, M. Machida, C. J. B. Pagan, and J. G. Reyna Almandos, “A spectroscopic study of radiation produced in a theta-pinch,” Nucl. Instr. Methods Phys. Res. A 280, 589–592 (1989).
[Crossref]

Parker, W. L.

L. W. Philips and W. L. Parker, “Spectra of argon in the extreme ultraviolet,” Phys. Rev. 60, 301–307 (1941).
[Crossref]

Peacock, N. J.

N. J. Peacock, M. F. Stamp, and J. D. Silver, “Highly-ionized atoms in fusion research plasma,” Phys. Scr. T8, 10–20 (1984).
[Crossref]

Philips, L. W.

L. W. Philips and W. L. Parker, “Spectra of argon in the extreme ultraviolet,” Phys. Rev. 60, 301–307 (1941).
[Crossref]

Pinnington, E. H.

Radziemski, L. J.

Rahimullah, K.

K. Rahimullah, P. Tavella, C. Novero, and A. Godone, “A semi-theoretical calculation of 3s3p fine-structure splitting in Mg i using asymptotic value of quantum defect,” Nuovo Cimento 15, 1113–1121 (1993).

Raineri, M.

Ramanujam,

Reader, J.

Redfors, A.

A. Redfors, “The 3d2 configuration in Ca ix–Zn xix,” Phys. Scr. 38, 702–706 (1988).
[Crossref]

U. Litzén and A. Redfors, “Revised and extended analysis of transitions and energy levels in the n=3 complex of Mg-like Ca ix–Ge xxi,” Phys. Scr. 36, 895–903 (1987).
[Crossref]

Reistad, N.

N. Reistad, T. Brage, J.-O. Ekberg, and L. Engström, “J-dependent 3s4p 3Pj lifetimes in Mg-like sulfur and chlorine,” Phys. Scr. 30, 249–254 (1984).
[Crossref]

Reyna Almandos, J. G.

A. G. Trigueiros, M. Machida, C. J. B. Pagan, and J. G. Reyna Almandos, “A spectroscopic study of radiation produced in a theta-pinch,” Nucl. Instr. Methods Phys. Res. A 280, 589–592 (1989).
[Crossref]

M. Gallardo, F. Bredice, M. Raineri, and J. G. Reyna Almandos, “Light source for obtaining spectra of highly ionized gases,” Appl. Opt. 28, 4513–4515 (1989).
[Crossref] [PubMed]

Ridgeley, A.

B. C. Fawcett, A. Ridgeley, and G. E. Bromage, “The spectrum Ar ix and extended spectral classification in Ar v to Ar viii and Ar x,” Phys. Scr. 18, 315–322 (1987).
[Crossref]

Robin, J.

G. Lèvêque, S. Girard, and J. Robin, “Emission spectrum of highly ionized argon in the 100 to 900 Å range,” J. Phys. 45, 665–670 (1984).

Rowan, W. L.

Ryabtsev, A. H.

S. S. Churilov, E. Y. Kononov, A. H. Ryabtsev, and Y. F. Zayikin, “A detailed analysis of the n=3–n′=3 transitions in the Mg-like ions Fe xv, Co xvi, and Ni xvii,” Phys. Scr. 32, 501–503 (1985).
[Crossref]

Seely, J. F.

J.-O. Ekberg, U. Feldman, J. F. Seely, C. M. Brown, B. J. MacGowan, D. R. Kania, and C. J. Keane, “Analysis of magnesiumlike spectra from Mo xxxi to Cs xliv,” Phys. Scr. 43, 19–32 (1991).
[Crossref]

Silver, J. D.

N. J. Peacock, M. F. Stamp, and J. D. Silver, “Highly-ionized atoms in fusion research plasma,” Phys. Scr. T8, 10–20 (1984).
[Crossref]

Stamp, M. F.

N. J. Peacock, M. F. Stamp, and J. D. Silver, “Highly-ionized atoms in fusion research plasma,” Phys. Scr. T8, 10–20 (1984).
[Crossref]

Stolterfoht, N.

P. Boduch, M. Chantepie, D. Hennecart, X. Husson, H. Kucal, D. Lecler, and N. Stolterfoht, “Spectroscopic analysis of visible and near UV light emitted by Ar7+ and Ar6+ ions produced in Ar8+–He and Ar8+–H2 collisions at 120 keV,” Phys. Scr. 45, 203–211 (1992).
[Crossref]

Sugar, J.

Talman, J. D.

K. Aashamar, T. M. Luke, and J. D. Talman, “Energy levels in the magnesium sequence, Mg i–Mn xiv, calculated in the multiconfiguration optimized potential model,” Phys. Scr. 34, 386–393 (1986).
[Crossref]

Tavella, P.

K. Rahimullah, P. Tavella, C. Novero, and A. Godone, “A semi-theoretical calculation of 3s3p fine-structure splitting in Mg i using asymptotic value of quantum defect,” Nuovo Cimento 15, 1113–1121 (1993).

Träbert, E.

E. Träbert, R. Hutton, L. Engström, S. L. Bliman, H. G. Berry, and C. Kurtz, “Delayed beam–foil spectra of 3 MeV Ar ions,” Phys. Lett. A 129, 381–385 (1988).
[Crossref]

Trigueiros, A. G.

A. G. Trigueiros, M. Machida, C. J. B. Pagan, and J. G. Reyna Almandos, “A spectroscopic study of radiation produced in a theta-pinch,” Nucl. Instr. Methods Phys. Res. A 280, 589–592 (1989).
[Crossref]

A. G. Trigueiros and A. J. Mania, , “Hartree–Fock and fit energy parameters for the Ar vii spectrum,” 2, 1996 (UNICAMP, São Paulo, Brazil).

Wyart, J. F.

S. S. Churilov, V. E. Levashov, and J. F. Wyart, “Extended analysis of the 3d2–3p3d transitions in the sequence K viii–Cu xviii and isoelectronic trends in Ma-like ions through Kr xxv,” Phys. Scr. 40, 625–633 (1989).
[Crossref]

Zayikin, Y. F.

S. S. Churilov, E. Y. Kononov, A. H. Ryabtsev, and Y. F. Zayikin, “A detailed analysis of the n=3–n′=3 transitions in the Mg-like ions Fe xv, Co xvi, and Ni xvii,” Phys. Scr. 32, 501–503 (1985).
[Crossref]

Zetterberg, P.-O.

I. Joelsson, P.-O. Zetterberg, and C.-E. Magnusson, “The spectrum and term system of S v,” Phys. Scr. 23, 1087–1095 (1981).
[Crossref]

P.-O. Zetterberg and C.-E. Magnusson, “The spectrum and term system of P iv,” Phys. Scr. 15, 189–201 (1977).
[Crossref]

Appl. Opt. (1)

At. Data Nucl. Data Tables (1)

B. C. Fawcett, “Calculated oscillator strengths and wavelengths for allowed transitions within the third shell for ions in the Mg-like isoelectronic sequence between S v and Ni xvii,” At. Data Nucl. Data Tables 28, 579–596 (1983).
[Crossref]

J. Opt. Soc. Am. (4)

J. Opt. Soc. Am. B (5)

J. Phys. (1)

G. Lèvêque, S. Girard, and J. Robin, “Emission spectrum of highly ionized argon in the 100 to 900 Å range,” J. Phys. 45, 665–670 (1984).

J. Phys. B (4)

T. Brage and A. Hibbert, “Plunging configurations and J-dependent lifetimes in Mg-like ions,” J. Phys. B 22, 713–726 (1989).
[Crossref]

A. Hibbert and F. P. Keenan, “Oscillator strengths for intercombination and forbidden transitions amongst the 3s2 and 3s3p levels in Al ii,” J. Phys. B 20, 4693–4697 (1987).
[Crossref]

K. L. Baluja and M. Mohan, “Electron impact excitation of forbidden and allowed transitions in Cl vi,” J. Phys. B 20, 831–838 (1987).
[Crossref]

S. Bliman, P. Indelicato, D. Hitz, P. Marseille, and J. P. Desclaux, “One-electron and two-electron-one photon electric dipole transitions in the Mg-Like argon spectrum,” J. Phys. B 22, 2741–2749 (1989).
[Crossref]

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

R. L. Kelly, “Atomic and ionic spectrum lines below 2000 Å: hydrogen trough krypton, part I (H–Ar),” J. Phys. Chem. Ref. Data Suppl. 1, 401–408 (1987).

Nucl. Instr. Methods Phys. Res. (2)

M.-C. Buchet-Poulizac, J. P. Buchet, and P. Ceyzeriat, “Spectroscopie et durees de vie dans Ar vi–viii,” Nucl. Instr. Methods Phys. Res. 202, 13–18 (1982).
[Crossref]

C. Froese-Fischer and M. Godefroid, “Lifetime trends for the n=3 singlet states in the Mg sequence,” Nucl. Instr. Methods Phys. Res. 202, 307–322 (1982).
[Crossref]

Nucl. Instr. Methods Phys. Res. A (1)

A. G. Trigueiros, M. Machida, C. J. B. Pagan, and J. G. Reyna Almandos, “A spectroscopic study of radiation produced in a theta-pinch,” Nucl. Instr. Methods Phys. Res. A 280, 589–592 (1989).
[Crossref]

Nucl. Instr. Methods Phys. Res. B (2)

K. L. Baluja and A. Hibbert, “Energies and oscillator strengths for allowed transitions in S v, Cl vi, and Fe xv,” Nucl. Instr. Methods Phys. Res. B 9, 477–486 (1985).
[Crossref]

S. Bliman, J. P. Desclaux, D. Hitz, P. Indelicato, and P. Marseille, “Collision aspects and spectroscopy of higher states in magnesium-like argon,” Nucl. Instr. Methods Phys. Res. B 31, 330–335 (1988).
[Crossref]

Nuovo Cimento (1)

K. Rahimullah, P. Tavella, C. Novero, and A. Godone, “A semi-theoretical calculation of 3s3p fine-structure splitting in Mg i using asymptotic value of quantum defect,” Nuovo Cimento 15, 1113–1121 (1993).

Opt. Spectrosc. (1)

V. E. Levashov, “Spectra of n=3–n′=3 transitions in K viii, Ca ix,and Ti xi magnesium-like ions,” Opt. Spectrosc. 66, 449–451 (1989).

Phys. Lett. A (1)

E. Träbert, R. Hutton, L. Engström, S. L. Bliman, H. G. Berry, and C. Kurtz, “Delayed beam–foil spectra of 3 MeV Ar ions,” Phys. Lett. A 129, 381–385 (1988).
[Crossref]

Phys. Rev. (1)

L. W. Philips and W. L. Parker, “Spectra of argon in the extreme ultraviolet,” Phys. Rev. 60, 301–307 (1941).
[Crossref]

Phys. Scr. (17)

P.-O. Zetterberg and C.-E. Magnusson, “The spectrum and term system of P iv,” Phys. Scr. 15, 189–201 (1977).
[Crossref]

I. Joelsson, P.-O. Zetterberg, and C.-E. Magnusson, “The spectrum and term system of S v,” Phys. Scr. 23, 1087–1095 (1981).
[Crossref]

J.-O. Ekberg, “Analyses of the Mg i-like spectra K viii, Ca ix, Sc x and Ti xi,” Phys. Scr. 4, 101–109 (1971).
[Crossref]

S. S. Churilov, E. Y. Kononov, A. H. Ryabtsev, and Y. F. Zayikin, “A detailed analysis of the n=3–n′=3 transitions in the Mg-like ions Fe xv, Co xvi, and Ni xvii,” Phys. Scr. 32, 501–503 (1985).
[Crossref]

U. Litzén and A. Redfors, “Revised and extended analysis of transitions and energy levels in the n=3 complex of Mg-like Ca ix–Ge xxi,” Phys. Scr. 36, 895–903 (1987).
[Crossref]

I. Lesteven-Vaı̈sse, F. Folkmann, A. Ben Sitel, M. Chantepie, and D. Lecler, “High resolution V. U. V. spectroscopy of argon recoil ions inducedby an ion beam,” Phys. Scr. 38, 45–54 (1988).
[Crossref]

A. Redfors, “The 3d2 configuration in Ca ix–Zn xix,” Phys. Scr. 38, 702–706 (1988).
[Crossref]

S. S. Churilov, V. E. Levashov, and J. F. Wyart, “Extended analysis of the 3d2–3p3d transitions in the sequence K viii–Cu xviii and isoelectronic trends in Ma-like ions through Kr xxv,” Phys. Scr. 40, 625–633 (1989).
[Crossref]

B. C. Fawcett, A. Ridgeley, and G. E. Bromage, “The spectrum Ar ix and extended spectral classification in Ar v to Ar viii and Ar x,” Phys. Scr. 18, 315–322 (1987).
[Crossref]

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[Crossref]

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[Crossref]

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[Crossref]

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[Crossref]

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[Crossref]

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Other (7)

Optimization of the energy level values was done with the computer program ELCALC, provided by L. J. Radziemski, Los Alamos National Laboratory, Los Alamos, N. M. 87544.

A. G. Trigueiros and A. J. Mania, , “Hartree–Fock and fit energy parameters for the Ar vii spectrum,” 2, 1996 (UNICAMP, São Paulo, Brazil).

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

B. Edlén, in Encyclopedia of Physics, S. Flügge, ed. (Springer, Berlin, 1964), Vol. 27, p. 80.

R. Hutton, University of Lund, 22362 Lund, Sweden (personal communication, 1997).

Ö. Andersson, “A method for atomic spectroscopy of highly charged ions in the Pm isoelectronic sequence,” Master’s Thesis (University of Lund, Lund, Sweden, 1995).

C. E. Moore, “Atomic Energy Levels,” (U.S. GOP, Washington, D.C., 1971), Vol. I and Vol. II.

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Figures (1)

Fig. 1
Fig. 1

Observed minus calculated Hartree–Fock wave numbers divided by the net charge of the core plus a constant (1.4) for the transition 3s3d 2D23p3d 2D2.

Tables (4)

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Table 1 Observed Transitions in the Spectrum of Ar vii

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Table 2 Experimental Energy-Level Values of Ar vii

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Table 3 Even-Parity Energy Parametersa

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Table 4 Odd-Parity Energy Parameters

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