Abstract

The transition array 2p63p3d2p63d2 has been identified in the spectrum of magnesium-like Ar vii produced by electrical discharges in the vacuum-ultraviolet region. Twenty-five new transitions have been identified as combinations of levels of this transition array. From these transitions we have determined the levels of the 3d2 configuration. It was also possible to determine the 2p63p3d1D2o level that was missed in the early research with the Ar vii spectrum. Hartree–Fock calculations with relativistic corrections were used to predict energy levels and transitions. Isoelectronic comparisons along the Mg i sequence are used to support the experimental results.

© 2001 Optical Society of America

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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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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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1997

1989

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

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

1988

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

1986

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]

B. C. Fawcett, “Calculated oscillator strengths, wave-lengths 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]

1985

K. L. Baluja and A. Hilbbert, “Energy and oscillator strengths for allowed transitions in S V, Cl VI, and Fe XV,” Nucl. Instrum. Methods Phys. Res. B 9, 477–486 (1985).
[CrossRef]

1984

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

1983

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]

1982

C. Froese-Fischer and M. Godefroid, “Lifetime trends for the n=3 singlet states in the Mg sequence,” Nucl. Instrum. 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]

1981

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

1977

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

1969

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]

Baluja, K. L.

K. L. Baluja and A. Hilbbert, “Energy and oscillator strengths for allowed transitions in S V, Cl VI, and Fe XV,” Nucl. Instrum. Methods Phys. Res. B 9, 477–486 (1985).
[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 sulphur and chlorine,” Phys. Scr. 30, 249–254 (1984).
[CrossRef]

Bredice, F.

Churilov, S. S.

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

Ekberg, J. O.

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

Engström, L.

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

Fawcett, B. C.

B. C. Fawcett, “Calculated oscillator strengths, wave-lengths 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]

Froese-Fischer, C.

C. Froese-Fischer and M. Godefroid, “Lifetime trends for the n=3 singlet states in the Mg sequence,” Nucl. Instrum. 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.

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. Instrum. Methods Phys. Res. 202, 307–322 (1982).
[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]

Hilbbert, A.

K. L. Baluja and A. Hilbbert, “Energy and oscillator strengths for allowed transitions in S V, Cl VI, and Fe XV,” Nucl. Instrum. Methods Phys. Res. B 9, 477–486 (1985).
[CrossRef]

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]

Kaufman, V.

Levashov, V. E.

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

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]

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.

Radziemski, L. J.

Raineri, M.

Redfors, A.

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

Reistad, N.

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

Reyna Almandos, J. G.

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]

Trigueiros, A. G.

Wyart, J. F.

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

At. Data Nucl. Data Tables

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.

J. Opt. Soc. Am. B

J. Phys. B

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

Nucl. Instrum. Methods Phys. Res.

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

Nucl. Instrum. Methods Phys. Res. B

K. L. Baluja and A. Hilbbert, “Energy and oscillator strengths for allowed transitions in S V, Cl VI, and Fe XV,” Nucl. Instrum. Methods Phys. Res. B 9, 477–486 (1985).
[CrossRef]

Phys. Scr.

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]

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]

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

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]

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 3p3d–3d2 transitions in the sequence K VIII–Cu XVIII and isoelectronic trends in Mg-like ions through Kr XXV,” Phys. Scr. 40, 625–633 (1989).
[CrossRef]

B. C. Fawcett, “Calculated oscillator strengths, wave-lengths 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]

Other

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

B. Edlén, “Atomic spectra,” in Encyclopedia of Physics, S. Flügge, ed. (Springer-Verlag, Berlin, 1964), Vol. 27, p. 80.

C. Jupén and J. Fremberg, University of Lund, S-22100 Lund, Sweden (personal communication, 1983).

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Tables (3)

Tables Icon

Table 1 Observed Spectral Lines in the 3p3d3d2 Transition Array in Ar vii

Tables Icon

Table 2 Energy Levels of Ar vii Established in This Paper

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Table 3 Energy Parameters of the Least-Squares Fit for the 2p63d2 Configuration of Ar vii

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