Abstract

Spectra emitted from plasmas produced through focusing the output of a 4-GW neodymium-glass laser onto plane solid targets of potassium, calcium, scandium, titanium, and vanadium were recorded with a 2-m grazing incidence spectrograph as were argon spectra emitted from a theta-pinch plasma. The analysis of the spectrograms yielded line classifications for the 2s2 2pn-2s2pn+ 1 and 2s 2pn+ 1-2pn+ 2 transition arrays. Identifications include those of beryllium i-like 2s 2p-2p2 spectra. The data is used to complete the tabulation of energy-level values for the 2s2 2pn, 2s 2pn+ 1, and 2pn+ 2 configurations of these elements.

© 1980 Optical Society of America

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  1. B. C. Fawcett, “Wavelengths and classifications of emission lines due to n = 2-2 transitions Z ≤ 28,” At. Data Nucl. Data Tables 16, 135–64 (1975).
    [Crossref]
  2. A. H. Gabriel and C. Jordan, “The interpretation of spectral line intensities from laboratory and astrophysical plasmas,” Case Studies in Atomic Collision Physics 2 (North-Holland, New York, 1972), pp. 212–291.
  3. B. C. Fawcett, “Classifications in the period between calcium and iron of emission lines isoelectronic with C, N, O, and F,” J. Phys. B 4, 981–985 (1971).
    [Crossref]
  4. B. C. Fawcett and R. W. Hayes, “Classification of spectra of K, Ca, Sc, Ti, V, and Cr,” Mon. Not. R. Astron. Soc. 170, 185–197 (1975).
  5. Ya. Kononov, K. N. Koshelev, L. I. Podobedova, and S. S. Churlov, “Spectra of calcium in the vacuum ultraviolet, Part 1: Ca xvii; Ca xvi” Opt. Spectrosc. 39, 458–460 (1975).
  6. Ya. Kononov, K. N. Koshelev, L. I. Podabedova, and S. S. Churlov, “Spectra of calcium in the vacuum ultraviolet 2: Ca xv and Ca xiv,” Opt. Spectrosc. 40, 121–123 (1976).
  7. Yu. S. Kasyanov, E. Kononov, V. V. Ya. Korobkin, K. N. Koschelev, A. N. Ryabtsev, R. V. Serov, and E. V. Skokan, “Intrashell transitions in the spectra of multiply charged titanium ions (TiXV –Ti XIX),” Opt. Spectrosc. 34, 4–6 (1974).
  8. G. A. Doschek, U. Feldman, R. D. Cowan, and L. Cohen, “Transition 2s2 2pk-2s 2pk+1 of the Fi, Oi, and N i isoelectronic sequences,” Astrophys. J. 188, 417–422 (1974).
    [Crossref]
  9. G. A. Doschek, U. Feldman, and L. Cohen, “Transitions 2s2 2p-2s 2pk in the B i isoelectronic sequence,” J. Opt. Soc. Am. 65, 463–464 (1975).
    [Crossref]
  10. U. Feldman, G. A. Doschek, R. D. Cowan, and L. Cohen, “Transitions 2s2 2pk-2s 2pk+1 of the N i and C i isoelectronic sequences,” Astrophys. J. 196, 613–616 (1975).
    [Crossref]
  11. J. D. Purcell and K. G. Widing, “Rocket observations of Arxii-xvi, Caxiv-xviii and Fexiv, xv, xxiv in the extreme ultraviolet spectrum of a solar flare,” Astrophys. J. 176, 239–247 (1972).
    [Crossref]
  12. G. D. Sandlin, G. E. Brueckner, V. E. Scherrer, and R. Tousey, “High temperature flare lines in the solar spectrum 171–630 Å,” Astrophys. J. 205, L47–L50 (1976).
    [Crossref]
  13. K. G. Widing and J. D. Purcell, “The lithium-like 2s 2S-2p 2P transition in solar flares,” Astrophys. J. 204, L151–L153 (1976).
    [Crossref]
  14. K. P. Dere, “Spectral lines observed in solar flares between 171 and 630 angstroms,” Astrophys. J. 221, 1062–1067 (1978).
    [Crossref]
  15. K. P. Dere, H. E. Mason, K. G. Widing, and A. K. Bhatia, “XUV density diagnostics for solar flares,” Astrophys. J. Suppl. 40, 341–364 (1979).
    [Crossref]
  16. E. Hinnov, “Observational resonance lines of highly ionized Ti, Cr, Fe, and Ni in Tokamak discharges,” Astrophys. J. 230, L197–L199 (1979).
    [Crossref]
  17. K. D. Lawson and N. J. Peacock, “The analysis of the n = 22–2 transitions in the XUV spectra of Cr to Ni,” J. Phys. B. (to be published).
  18. B. Edlén, “A critical survey of low configurations in Be i-like spectra,” Phys. Scr. 20, 129–137 (1979b).
    [Crossref]
  19. B. Edlén, “Accurate semi-empirical formulae for the energy structure of Li-I like spectra,” Phys. Scr. 19, 255–256 (1979a).
    [Crossref]
  20. A. H. Gabriel, J. R. Swain, and W. A. Waller, “A two-metre grazing incidence spectrometer for use in the5–950 Å range,” J. Sci. Instrum. 42, 94–97 (1965).
    [Crossref]
  21. B. C. Fawcett, A. H. Gabriel, and T. M. Paget, “New observations of spectra of Arx to xv and isoelectronic lines in Si, P, S, and Cl,” J. Phys. B 4, 986–994 (1971).
    [Crossref]
  22. B. C. Fawcett and R. W. Hayes, “Classification of n = 2–3 transitions in S, P, Cl, and Ar,” Phys. Scr. 8, 244–248 (1973).
    [Crossref]

1979 (2)

K. P. Dere, H. E. Mason, K. G. Widing, and A. K. Bhatia, “XUV density diagnostics for solar flares,” Astrophys. J. Suppl. 40, 341–364 (1979).
[Crossref]

E. Hinnov, “Observational resonance lines of highly ionized Ti, Cr, Fe, and Ni in Tokamak discharges,” Astrophys. J. 230, L197–L199 (1979).
[Crossref]

1978 (1)

K. P. Dere, “Spectral lines observed in solar flares between 171 and 630 angstroms,” Astrophys. J. 221, 1062–1067 (1978).
[Crossref]

1976 (3)

G. D. Sandlin, G. E. Brueckner, V. E. Scherrer, and R. Tousey, “High temperature flare lines in the solar spectrum 171–630 Å,” Astrophys. J. 205, L47–L50 (1976).
[Crossref]

K. G. Widing and J. D. Purcell, “The lithium-like 2s 2S-2p 2P transition in solar flares,” Astrophys. J. 204, L151–L153 (1976).
[Crossref]

Ya. Kononov, K. N. Koshelev, L. I. Podabedova, and S. S. Churlov, “Spectra of calcium in the vacuum ultraviolet 2: Ca xv and Ca xiv,” Opt. Spectrosc. 40, 121–123 (1976).

1975 (5)

U. Feldman, G. A. Doschek, R. D. Cowan, and L. Cohen, “Transitions 2s2 2pk-2s 2pk+1 of the N i and C i isoelectronic sequences,” Astrophys. J. 196, 613–616 (1975).
[Crossref]

B. C. Fawcett, “Wavelengths and classifications of emission lines due to n = 2-2 transitions Z ≤ 28,” At. Data Nucl. Data Tables 16, 135–64 (1975).
[Crossref]

B. C. Fawcett and R. W. Hayes, “Classification of spectra of K, Ca, Sc, Ti, V, and Cr,” Mon. Not. R. Astron. Soc. 170, 185–197 (1975).

Ya. Kononov, K. N. Koshelev, L. I. Podobedova, and S. S. Churlov, “Spectra of calcium in the vacuum ultraviolet, Part 1: Ca xvii; Ca xvi” Opt. Spectrosc. 39, 458–460 (1975).

G. A. Doschek, U. Feldman, and L. Cohen, “Transitions 2s2 2p-2s 2pk in the B i isoelectronic sequence,” J. Opt. Soc. Am. 65, 463–464 (1975).
[Crossref]

1974 (2)

Yu. S. Kasyanov, E. Kononov, V. V. Ya. Korobkin, K. N. Koschelev, A. N. Ryabtsev, R. V. Serov, and E. V. Skokan, “Intrashell transitions in the spectra of multiply charged titanium ions (TiXV –Ti XIX),” Opt. Spectrosc. 34, 4–6 (1974).

G. A. Doschek, U. Feldman, R. D. Cowan, and L. Cohen, “Transition 2s2 2pk-2s 2pk+1 of the Fi, Oi, and N i isoelectronic sequences,” Astrophys. J. 188, 417–422 (1974).
[Crossref]

1973 (1)

B. C. Fawcett and R. W. Hayes, “Classification of n = 2–3 transitions in S, P, Cl, and Ar,” Phys. Scr. 8, 244–248 (1973).
[Crossref]

1972 (1)

J. D. Purcell and K. G. Widing, “Rocket observations of Arxii-xvi, Caxiv-xviii and Fexiv, xv, xxiv in the extreme ultraviolet spectrum of a solar flare,” Astrophys. J. 176, 239–247 (1972).
[Crossref]

1971 (2)

B. C. Fawcett, “Classifications in the period between calcium and iron of emission lines isoelectronic with C, N, O, and F,” J. Phys. B 4, 981–985 (1971).
[Crossref]

B. C. Fawcett, A. H. Gabriel, and T. M. Paget, “New observations of spectra of Arx to xv and isoelectronic lines in Si, P, S, and Cl,” J. Phys. B 4, 986–994 (1971).
[Crossref]

1965 (1)

A. H. Gabriel, J. R. Swain, and W. A. Waller, “A two-metre grazing incidence spectrometer for use in the5–950 Å range,” J. Sci. Instrum. 42, 94–97 (1965).
[Crossref]

Bhatia, A. K.

K. P. Dere, H. E. Mason, K. G. Widing, and A. K. Bhatia, “XUV density diagnostics for solar flares,” Astrophys. J. Suppl. 40, 341–364 (1979).
[Crossref]

Brueckner, G. E.

G. D. Sandlin, G. E. Brueckner, V. E. Scherrer, and R. Tousey, “High temperature flare lines in the solar spectrum 171–630 Å,” Astrophys. J. 205, L47–L50 (1976).
[Crossref]

Churlov, S. S.

Ya. Kononov, K. N. Koshelev, L. I. Podabedova, and S. S. Churlov, “Spectra of calcium in the vacuum ultraviolet 2: Ca xv and Ca xiv,” Opt. Spectrosc. 40, 121–123 (1976).

Ya. Kononov, K. N. Koshelev, L. I. Podobedova, and S. S. Churlov, “Spectra of calcium in the vacuum ultraviolet, Part 1: Ca xvii; Ca xvi” Opt. Spectrosc. 39, 458–460 (1975).

Cohen, L.

U. Feldman, G. A. Doschek, R. D. Cowan, and L. Cohen, “Transitions 2s2 2pk-2s 2pk+1 of the N i and C i isoelectronic sequences,” Astrophys. J. 196, 613–616 (1975).
[Crossref]

G. A. Doschek, U. Feldman, and L. Cohen, “Transitions 2s2 2p-2s 2pk in the B i isoelectronic sequence,” J. Opt. Soc. Am. 65, 463–464 (1975).
[Crossref]

G. A. Doschek, U. Feldman, R. D. Cowan, and L. Cohen, “Transition 2s2 2pk-2s 2pk+1 of the Fi, Oi, and N i isoelectronic sequences,” Astrophys. J. 188, 417–422 (1974).
[Crossref]

Cowan, R. D.

U. Feldman, G. A. Doschek, R. D. Cowan, and L. Cohen, “Transitions 2s2 2pk-2s 2pk+1 of the N i and C i isoelectronic sequences,” Astrophys. J. 196, 613–616 (1975).
[Crossref]

G. A. Doschek, U. Feldman, R. D. Cowan, and L. Cohen, “Transition 2s2 2pk-2s 2pk+1 of the Fi, Oi, and N i isoelectronic sequences,” Astrophys. J. 188, 417–422 (1974).
[Crossref]

Dere, K. P.

K. P. Dere, H. E. Mason, K. G. Widing, and A. K. Bhatia, “XUV density diagnostics for solar flares,” Astrophys. J. Suppl. 40, 341–364 (1979).
[Crossref]

K. P. Dere, “Spectral lines observed in solar flares between 171 and 630 angstroms,” Astrophys. J. 221, 1062–1067 (1978).
[Crossref]

Doschek, G. A.

G. A. Doschek, U. Feldman, and L. Cohen, “Transitions 2s2 2p-2s 2pk in the B i isoelectronic sequence,” J. Opt. Soc. Am. 65, 463–464 (1975).
[Crossref]

U. Feldman, G. A. Doschek, R. D. Cowan, and L. Cohen, “Transitions 2s2 2pk-2s 2pk+1 of the N i and C i isoelectronic sequences,” Astrophys. J. 196, 613–616 (1975).
[Crossref]

G. A. Doschek, U. Feldman, R. D. Cowan, and L. Cohen, “Transition 2s2 2pk-2s 2pk+1 of the Fi, Oi, and N i isoelectronic sequences,” Astrophys. J. 188, 417–422 (1974).
[Crossref]

Edlén, B.

B. Edlén, “A critical survey of low configurations in Be i-like spectra,” Phys. Scr. 20, 129–137 (1979b).
[Crossref]

B. Edlén, “Accurate semi-empirical formulae for the energy structure of Li-I like spectra,” Phys. Scr. 19, 255–256 (1979a).
[Crossref]

Fawcett, B. C.

B. C. Fawcett, “Wavelengths and classifications of emission lines due to n = 2-2 transitions Z ≤ 28,” At. Data Nucl. Data Tables 16, 135–64 (1975).
[Crossref]

B. C. Fawcett and R. W. Hayes, “Classification of spectra of K, Ca, Sc, Ti, V, and Cr,” Mon. Not. R. Astron. Soc. 170, 185–197 (1975).

B. C. Fawcett and R. W. Hayes, “Classification of n = 2–3 transitions in S, P, Cl, and Ar,” Phys. Scr. 8, 244–248 (1973).
[Crossref]

B. C. Fawcett, A. H. Gabriel, and T. M. Paget, “New observations of spectra of Arx to xv and isoelectronic lines in Si, P, S, and Cl,” J. Phys. B 4, 986–994 (1971).
[Crossref]

B. C. Fawcett, “Classifications in the period between calcium and iron of emission lines isoelectronic with C, N, O, and F,” J. Phys. B 4, 981–985 (1971).
[Crossref]

Feldman, U.

U. Feldman, G. A. Doschek, R. D. Cowan, and L. Cohen, “Transitions 2s2 2pk-2s 2pk+1 of the N i and C i isoelectronic sequences,” Astrophys. J. 196, 613–616 (1975).
[Crossref]

G. A. Doschek, U. Feldman, and L. Cohen, “Transitions 2s2 2p-2s 2pk in the B i isoelectronic sequence,” J. Opt. Soc. Am. 65, 463–464 (1975).
[Crossref]

G. A. Doschek, U. Feldman, R. D. Cowan, and L. Cohen, “Transition 2s2 2pk-2s 2pk+1 of the Fi, Oi, and N i isoelectronic sequences,” Astrophys. J. 188, 417–422 (1974).
[Crossref]

Gabriel, A. H.

B. C. Fawcett, A. H. Gabriel, and T. M. Paget, “New observations of spectra of Arx to xv and isoelectronic lines in Si, P, S, and Cl,” J. Phys. B 4, 986–994 (1971).
[Crossref]

A. H. Gabriel, J. R. Swain, and W. A. Waller, “A two-metre grazing incidence spectrometer for use in the5–950 Å range,” J. Sci. Instrum. 42, 94–97 (1965).
[Crossref]

A. H. Gabriel and C. Jordan, “The interpretation of spectral line intensities from laboratory and astrophysical plasmas,” Case Studies in Atomic Collision Physics 2 (North-Holland, New York, 1972), pp. 212–291.

Hayes, R. W.

B. C. Fawcett and R. W. Hayes, “Classification of spectra of K, Ca, Sc, Ti, V, and Cr,” Mon. Not. R. Astron. Soc. 170, 185–197 (1975).

B. C. Fawcett and R. W. Hayes, “Classification of n = 2–3 transitions in S, P, Cl, and Ar,” Phys. Scr. 8, 244–248 (1973).
[Crossref]

Hinnov, E.

E. Hinnov, “Observational resonance lines of highly ionized Ti, Cr, Fe, and Ni in Tokamak discharges,” Astrophys. J. 230, L197–L199 (1979).
[Crossref]

Jordan, C.

A. H. Gabriel and C. Jordan, “The interpretation of spectral line intensities from laboratory and astrophysical plasmas,” Case Studies in Atomic Collision Physics 2 (North-Holland, New York, 1972), pp. 212–291.

Kasyanov, Yu. S.

Yu. S. Kasyanov, E. Kononov, V. V. Ya. Korobkin, K. N. Koschelev, A. N. Ryabtsev, R. V. Serov, and E. V. Skokan, “Intrashell transitions in the spectra of multiply charged titanium ions (TiXV –Ti XIX),” Opt. Spectrosc. 34, 4–6 (1974).

Kononov, E.

Yu. S. Kasyanov, E. Kononov, V. V. Ya. Korobkin, K. N. Koschelev, A. N. Ryabtsev, R. V. Serov, and E. V. Skokan, “Intrashell transitions in the spectra of multiply charged titanium ions (TiXV –Ti XIX),” Opt. Spectrosc. 34, 4–6 (1974).

Kononov, Ya.

Ya. Kononov, K. N. Koshelev, L. I. Podabedova, and S. S. Churlov, “Spectra of calcium in the vacuum ultraviolet 2: Ca xv and Ca xiv,” Opt. Spectrosc. 40, 121–123 (1976).

Ya. Kononov, K. N. Koshelev, L. I. Podobedova, and S. S. Churlov, “Spectra of calcium in the vacuum ultraviolet, Part 1: Ca xvii; Ca xvi” Opt. Spectrosc. 39, 458–460 (1975).

Korobkin, V. V. Ya.

Yu. S. Kasyanov, E. Kononov, V. V. Ya. Korobkin, K. N. Koschelev, A. N. Ryabtsev, R. V. Serov, and E. V. Skokan, “Intrashell transitions in the spectra of multiply charged titanium ions (TiXV –Ti XIX),” Opt. Spectrosc. 34, 4–6 (1974).

Koschelev, K. N.

Yu. S. Kasyanov, E. Kononov, V. V. Ya. Korobkin, K. N. Koschelev, A. N. Ryabtsev, R. V. Serov, and E. V. Skokan, “Intrashell transitions in the spectra of multiply charged titanium ions (TiXV –Ti XIX),” Opt. Spectrosc. 34, 4–6 (1974).

Koshelev, K. N.

Ya. Kononov, K. N. Koshelev, L. I. Podabedova, and S. S. Churlov, “Spectra of calcium in the vacuum ultraviolet 2: Ca xv and Ca xiv,” Opt. Spectrosc. 40, 121–123 (1976).

Ya. Kononov, K. N. Koshelev, L. I. Podobedova, and S. S. Churlov, “Spectra of calcium in the vacuum ultraviolet, Part 1: Ca xvii; Ca xvi” Opt. Spectrosc. 39, 458–460 (1975).

Lawson, K. D.

K. D. Lawson and N. J. Peacock, “The analysis of the n = 22–2 transitions in the XUV spectra of Cr to Ni,” J. Phys. B. (to be published).

Mason, H. E.

K. P. Dere, H. E. Mason, K. G. Widing, and A. K. Bhatia, “XUV density diagnostics for solar flares,” Astrophys. J. Suppl. 40, 341–364 (1979).
[Crossref]

Paget, T. M.

B. C. Fawcett, A. H. Gabriel, and T. M. Paget, “New observations of spectra of Arx to xv and isoelectronic lines in Si, P, S, and Cl,” J. Phys. B 4, 986–994 (1971).
[Crossref]

Peacock, N. J.

K. D. Lawson and N. J. Peacock, “The analysis of the n = 22–2 transitions in the XUV spectra of Cr to Ni,” J. Phys. B. (to be published).

Podabedova, L. I.

Ya. Kononov, K. N. Koshelev, L. I. Podabedova, and S. S. Churlov, “Spectra of calcium in the vacuum ultraviolet 2: Ca xv and Ca xiv,” Opt. Spectrosc. 40, 121–123 (1976).

Podobedova, L. I.

Ya. Kononov, K. N. Koshelev, L. I. Podobedova, and S. S. Churlov, “Spectra of calcium in the vacuum ultraviolet, Part 1: Ca xvii; Ca xvi” Opt. Spectrosc. 39, 458–460 (1975).

Purcell, J. D.

K. G. Widing and J. D. Purcell, “The lithium-like 2s 2S-2p 2P transition in solar flares,” Astrophys. J. 204, L151–L153 (1976).
[Crossref]

J. D. Purcell and K. G. Widing, “Rocket observations of Arxii-xvi, Caxiv-xviii and Fexiv, xv, xxiv in the extreme ultraviolet spectrum of a solar flare,” Astrophys. J. 176, 239–247 (1972).
[Crossref]

Ryabtsev, A. N.

Yu. S. Kasyanov, E. Kononov, V. V. Ya. Korobkin, K. N. Koschelev, A. N. Ryabtsev, R. V. Serov, and E. V. Skokan, “Intrashell transitions in the spectra of multiply charged titanium ions (TiXV –Ti XIX),” Opt. Spectrosc. 34, 4–6 (1974).

Sandlin, G. D.

G. D. Sandlin, G. E. Brueckner, V. E. Scherrer, and R. Tousey, “High temperature flare lines in the solar spectrum 171–630 Å,” Astrophys. J. 205, L47–L50 (1976).
[Crossref]

Scherrer, V. E.

G. D. Sandlin, G. E. Brueckner, V. E. Scherrer, and R. Tousey, “High temperature flare lines in the solar spectrum 171–630 Å,” Astrophys. J. 205, L47–L50 (1976).
[Crossref]

Serov, R. V.

Yu. S. Kasyanov, E. Kononov, V. V. Ya. Korobkin, K. N. Koschelev, A. N. Ryabtsev, R. V. Serov, and E. V. Skokan, “Intrashell transitions in the spectra of multiply charged titanium ions (TiXV –Ti XIX),” Opt. Spectrosc. 34, 4–6 (1974).

Skokan, E. V.

Yu. S. Kasyanov, E. Kononov, V. V. Ya. Korobkin, K. N. Koschelev, A. N. Ryabtsev, R. V. Serov, and E. V. Skokan, “Intrashell transitions in the spectra of multiply charged titanium ions (TiXV –Ti XIX),” Opt. Spectrosc. 34, 4–6 (1974).

Swain, J. R.

A. H. Gabriel, J. R. Swain, and W. A. Waller, “A two-metre grazing incidence spectrometer for use in the5–950 Å range,” J. Sci. Instrum. 42, 94–97 (1965).
[Crossref]

Tousey, R.

G. D. Sandlin, G. E. Brueckner, V. E. Scherrer, and R. Tousey, “High temperature flare lines in the solar spectrum 171–630 Å,” Astrophys. J. 205, L47–L50 (1976).
[Crossref]

Waller, W. A.

A. H. Gabriel, J. R. Swain, and W. A. Waller, “A two-metre grazing incidence spectrometer for use in the5–950 Å range,” J. Sci. Instrum. 42, 94–97 (1965).
[Crossref]

Widing, K. G.

K. P. Dere, H. E. Mason, K. G. Widing, and A. K. Bhatia, “XUV density diagnostics for solar flares,” Astrophys. J. Suppl. 40, 341–364 (1979).
[Crossref]

K. G. Widing and J. D. Purcell, “The lithium-like 2s 2S-2p 2P transition in solar flares,” Astrophys. J. 204, L151–L153 (1976).
[Crossref]

J. D. Purcell and K. G. Widing, “Rocket observations of Arxii-xvi, Caxiv-xviii and Fexiv, xv, xxiv in the extreme ultraviolet spectrum of a solar flare,” Astrophys. J. 176, 239–247 (1972).
[Crossref]

Astrophys. J. (7)

G. A. Doschek, U. Feldman, R. D. Cowan, and L. Cohen, “Transition 2s2 2pk-2s 2pk+1 of the Fi, Oi, and N i isoelectronic sequences,” Astrophys. J. 188, 417–422 (1974).
[Crossref]

U. Feldman, G. A. Doschek, R. D. Cowan, and L. Cohen, “Transitions 2s2 2pk-2s 2pk+1 of the N i and C i isoelectronic sequences,” Astrophys. J. 196, 613–616 (1975).
[Crossref]

J. D. Purcell and K. G. Widing, “Rocket observations of Arxii-xvi, Caxiv-xviii and Fexiv, xv, xxiv in the extreme ultraviolet spectrum of a solar flare,” Astrophys. J. 176, 239–247 (1972).
[Crossref]

G. D. Sandlin, G. E. Brueckner, V. E. Scherrer, and R. Tousey, “High temperature flare lines in the solar spectrum 171–630 Å,” Astrophys. J. 205, L47–L50 (1976).
[Crossref]

K. G. Widing and J. D. Purcell, “The lithium-like 2s 2S-2p 2P transition in solar flares,” Astrophys. J. 204, L151–L153 (1976).
[Crossref]

K. P. Dere, “Spectral lines observed in solar flares between 171 and 630 angstroms,” Astrophys. J. 221, 1062–1067 (1978).
[Crossref]

E. Hinnov, “Observational resonance lines of highly ionized Ti, Cr, Fe, and Ni in Tokamak discharges,” Astrophys. J. 230, L197–L199 (1979).
[Crossref]

Astrophys. J. Suppl. (1)

K. P. Dere, H. E. Mason, K. G. Widing, and A. K. Bhatia, “XUV density diagnostics for solar flares,” Astrophys. J. Suppl. 40, 341–364 (1979).
[Crossref]

At. Data Nucl. Data Tables (1)

B. C. Fawcett, “Wavelengths and classifications of emission lines due to n = 2-2 transitions Z ≤ 28,” At. Data Nucl. Data Tables 16, 135–64 (1975).
[Crossref]

J. Opt. Soc. Am. (1)

J. Phys. B (2)

B. C. Fawcett, “Classifications in the period between calcium and iron of emission lines isoelectronic with C, N, O, and F,” J. Phys. B 4, 981–985 (1971).
[Crossref]

B. C. Fawcett, A. H. Gabriel, and T. M. Paget, “New observations of spectra of Arx to xv and isoelectronic lines in Si, P, S, and Cl,” J. Phys. B 4, 986–994 (1971).
[Crossref]

J. Sci. Instrum. (1)

A. H. Gabriel, J. R. Swain, and W. A. Waller, “A two-metre grazing incidence spectrometer for use in the5–950 Å range,” J. Sci. Instrum. 42, 94–97 (1965).
[Crossref]

Mon. Not. R. Astron. Soc. (1)

B. C. Fawcett and R. W. Hayes, “Classification of spectra of K, Ca, Sc, Ti, V, and Cr,” Mon. Not. R. Astron. Soc. 170, 185–197 (1975).

Opt. Spectrosc. (3)

Ya. Kononov, K. N. Koshelev, L. I. Podobedova, and S. S. Churlov, “Spectra of calcium in the vacuum ultraviolet, Part 1: Ca xvii; Ca xvi” Opt. Spectrosc. 39, 458–460 (1975).

Ya. Kononov, K. N. Koshelev, L. I. Podabedova, and S. S. Churlov, “Spectra of calcium in the vacuum ultraviolet 2: Ca xv and Ca xiv,” Opt. Spectrosc. 40, 121–123 (1976).

Yu. S. Kasyanov, E. Kononov, V. V. Ya. Korobkin, K. N. Koschelev, A. N. Ryabtsev, R. V. Serov, and E. V. Skokan, “Intrashell transitions in the spectra of multiply charged titanium ions (TiXV –Ti XIX),” Opt. Spectrosc. 34, 4–6 (1974).

Phys. Scr. (3)

B. Edlén, “A critical survey of low configurations in Be i-like spectra,” Phys. Scr. 20, 129–137 (1979b).
[Crossref]

B. Edlén, “Accurate semi-empirical formulae for the energy structure of Li-I like spectra,” Phys. Scr. 19, 255–256 (1979a).
[Crossref]

B. C. Fawcett and R. W. Hayes, “Classification of n = 2–3 transitions in S, P, Cl, and Ar,” Phys. Scr. 8, 244–248 (1973).
[Crossref]

Other (2)

K. D. Lawson and N. J. Peacock, “The analysis of the n = 22–2 transitions in the XUV spectra of Cr to Ni,” J. Phys. B. (to be published).

A. H. Gabriel and C. Jordan, “The interpretation of spectral line intensities from laboratory and astrophysical plasmas,” Case Studies in Atomic Collision Physics 2 (North-Holland, New York, 1972), pp. 212–291.

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Figures (1)

FIG. 1
FIG. 1

Spectra of Be i-like ions due to 2s 2p-2p2 transitions emitted from laser-produced plasmas.

Tables (9)

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TABLE I Classified lines isoelectronic with lithium i.a

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TABLE II Classified lines isoelectronic with beryllium i

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TABLE III Classified lines isoelectronic with boron i

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TABLE IV Classified lines isoelectronic with carbon i

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TABLE V Classified lines isoelectronic with nitrogen i

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TABLE VI Energy levels isoelectronic with lithium i in cm−1

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TABLE VII Energy levels isoelectronic with beryllium i in cm−1

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TABLE VIII Energy levels isoelectronic with boron i in cm−1

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TABLE IX Energy levels isoelectronic with carbon i in cm−1

Equations (20)

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1 2 1 2
1 2 1 1 2
2 1 2 1 1 2
1 1 2 1 2
1 1 2 1 1 2
2 1 2 1 1 2
2 1 2 2 1 2
1 1 2 1 1 2
1 1 2 2 1 2
1 1 2 1 1 2
1 2 1 2
1 2 1 1 2
1 1 2 1 2
1 1 2 1 1 2
1 2 1 2
1 2
1 1 2
2 D 1 1 2
2 1 2
1 1 2