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 2s<sup>2</sup> 2p<sup>n</sup>-2s2p<sup>n+1</sup> and 2s 2p<sup>n+1</sup>-2p<sup>n+2</sup> transition arrays. Identifications include those of beryllium I-like 2s 2p-2p<sup>2</sup> spectra. The data is used to complete the tabulation of energy-level values for the 2s<sup>2</sup> 2p<sup>n</sup>, 2s 2p<sup>n+1</sup>, and 2p<sup>n+2</sup> 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).
  2. A. H. Gabriel, 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).
  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: CaXVII; 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: CaXV and CaXIV," 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 – TiXIX)," 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 NI isoelectronic sequences," Astrophys. J. 188, 417–422 (1974).
  9. G. A. Doschek, U. Feldman, and L. Cohen, "Transitions 2s2 2p-2s 2pk in the BI isoelectronic sequence," J. Opt. Soc. Am. 65, 463–464 (1975).
  10. U. Feldman, G. A. Doschek, R. D. Cowan, and L. Cohen, "Transitions 2s2 2pk-2s 2pk+1 of the NI, and CI isoelectronic sequences," Astrophys. J. 196, 613–616 (1975).
  11. J. D. Purcell and K. G. Widing, "Rocket observations of Ar XI–XVI, CaXIV–XVIII and FeXIV, XV, XXIV in the extreme ultraviolet spectrum of a solar flare," Astrophys. J. 176, 239–247 (1972).
  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).
  13. K. G. Widing and J. D. Purcell, "The lithium-like 2s2.S-2p 2.P transition in solar flares," Astrophys. J. 204, L151–L153 (1976).
  14. K. P. Dere, "Spectral lines observed in solar flares between 171 and 630 angstroms," Astrophys. J. 221, 1062–1067 (1978).
  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).
  16. E. Hinnov, "Observational resonance lines of highly ionized Ti, Cr, Fe, and Ni in Tokamak discharges," Astrophys. J. 230, L197–L199 (1979).
  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).
  19. B. Edlén, "Accurate semi-empirical formulae for the energy structure of Li-I like spectra," Phys. Scr. 19, 255–256 (1979a).
  20. A. H. Gabriel, J. R. Swain, and W. A. Waller, "A two-metre grazing incidence spectrometer for use in the 5–950 Å range," J. Sci. Instrum. 42, 94–97 (1965).
  21. B. C. Fawcett, A. H. Gabriel, and T. M. Paget, "New observations of spectra of Ar X to XV and isoelectronic lines in Si, P, S, and Cl," J. Phys. B 4, 986–994 (1971).
  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).

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).

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

1978 (1)

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

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).

K. G. Widing and J. D. Purcell, "The lithium-like 2s2.S-2p 2.P transition in solar flares," Astrophys. J. 204, L151–L153 (1976).

Ya. Kononov, K. N. Koshelev, L. I. Podabedova, and S. S. Churlov, "Spectra of calcium in the vacuum ultraviolet 2: CaXV and CaXIV," 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 NI, and CI isoelectronic sequences," Astrophys. J. 196, 613–616 (1975).

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).

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: CaXVII; Ca XVI" Opt. Spectrosc. 39, 458–460 (1975).

G. A. Doschek, U. Feldman, and L. Cohen, "Transitions 2s2 2p-2s 2pk in the BI isoelectronic sequence," J. Opt. Soc. Am. 65, 463–464 (1975).

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 – TiXIX)," 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 NI isoelectronic sequences," Astrophys. J. 188, 417–422 (1974).

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).

1972 (1)

J. D. Purcell and K. G. Widing, "Rocket observations of Ar XI–XVI, CaXIV–XVIII and FeXIV, XV, XXIV in the extreme ultraviolet spectrum of a solar flare," Astrophys. J. 176, 239–247 (1972).

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).

B. C. Fawcett, A. H. Gabriel, and T. M. Paget, "New observations of spectra of Ar X to XV and isoelectronic lines in Si, P, S, and Cl," J. Phys. B 4, 986–994 (1971).

1965 (1)

A. H. Gabriel, J. R. Swain, and W. A. Waller, "A two-metre grazing incidence spectrometer for use in the 5–950 Å range," J. Sci. Instrum. 42, 94–97 (1965).

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).

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).

Churlov, S. S.

Ya. Kononov, K. N. Koshelev, L. I. Podabedova, and S. S. Churlov, "Spectra of calcium in the vacuum ultraviolet 2: CaXV and CaXIV," 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: CaXVII; Ca XVI" Opt. Spectrosc. 39, 458–460 (1975).

Cohen, L.

G. A. Doschek, U. Feldman, and L. Cohen, "Transitions 2s2 2p-2s 2pk in the BI isoelectronic sequence," J. Opt. Soc. Am. 65, 463–464 (1975).

U. Feldman, G. A. Doschek, R. D. Cowan, and L. Cohen, "Transitions 2s2 2pk-2s 2pk+1 of the NI, and CI isoelectronic sequences," Astrophys. J. 196, 613–616 (1975).

G. A. Doschek, U. Feldman, R. D. Cowan, and L. Cohen, "Transition 2s2 2pk-2s 2pk+1 of the FI, OI, and NI isoelectronic sequences," Astrophys. J. 188, 417–422 (1974).

Cowan, R. D.

U. Feldman, G. A. Doschek, R. D. Cowan, and L. Cohen, "Transitions 2s2 2pk-2s 2pk+1 of the NI, and CI isoelectronic sequences," Astrophys. J. 196, 613–616 (1975).

G. A. Doschek, U. Feldman, R. D. Cowan, and L. Cohen, "Transition 2s2 2pk-2s 2pk+1 of the FI, OI, and NI isoelectronic sequences," Astrophys. J. 188, 417–422 (1974).

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).

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

Doschek, G. A.

U. Feldman, G. A. Doschek, R. D. Cowan, and L. Cohen, "Transitions 2s2 2pk-2s 2pk+1 of the NI, and CI isoelectronic sequences," Astrophys. J. 196, 613–616 (1975).

G. A. Doschek, U. Feldman, and L. Cohen, "Transitions 2s2 2p-2s 2pk in the BI isoelectronic sequence," J. Opt. Soc. Am. 65, 463–464 (1975).

G. A. Doschek, U. Feldman, R. D. Cowan, and L. Cohen, "Transition 2s2 2pk-2s 2pk+1 of the FI, OI, and NI isoelectronic sequences," Astrophys. J. 188, 417–422 (1974).

Edlén, B.

B. Edlén, "A critical survey of low configurations in Be I-like spectra," Phys. Scr. 20, 129–137 (1979b).

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

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).

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).

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).

B. C. Fawcett, A. H. Gabriel, and T. M. Paget, "New observations of spectra of Ar X to XV and isoelectronic lines in Si, P, S, and Cl," J. Phys. B 4, 986–994 (1971).

Feldman, U.

U. Feldman, G. A. Doschek, R. D. Cowan, and L. Cohen, "Transitions 2s2 2pk-2s 2pk+1 of the NI, and CI isoelectronic sequences," Astrophys. J. 196, 613–616 (1975).

G. A. Doschek, U. Feldman, and L. Cohen, "Transitions 2s2 2p-2s 2pk in the BI isoelectronic sequence," J. Opt. Soc. Am. 65, 463–464 (1975).

G. A. Doschek, U. Feldman, R. D. Cowan, and L. Cohen, "Transition 2s2 2pk-2s 2pk+1 of the FI, OI, and NI isoelectronic sequences," Astrophys. J. 188, 417–422 (1974).

Gabriel, A. H.

B. C. Fawcett, A. H. Gabriel, and T. M. Paget, "New observations of spectra of Ar X to XV and isoelectronic lines in Si, P, S, and Cl," J. Phys. B 4, 986–994 (1971).

A. H. Gabriel, J. R. Swain, and W. A. Waller, "A two-metre grazing incidence spectrometer for use in the 5–950 Å range," J. Sci. Instrum. 42, 94–97 (1965).

A. H. Gabriel, 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).

Hinnov, E.

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

Jordan, C.

A. H. Gabriel, 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 – TiXIX)," 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 – TiXIX)," 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: CaXV and CaXIV," 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: CaXVII; 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 – TiXIX)," 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 – TiXIX)," 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: CaXV and CaXIV," 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: CaXVII; 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).

Paget, T. M.

B. C. Fawcett, A. H. Gabriel, and T. M. Paget, "New observations of spectra of Ar X to XV and isoelectronic lines in Si, P, S, and Cl," J. Phys. B 4, 986–994 (1971).

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: CaXV and CaXIV," 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: CaXVII; Ca XVI" Opt. Spectrosc. 39, 458–460 (1975).

Purcell, J. D.

K. G. Widing and J. D. Purcell, "The lithium-like 2s2.S-2p 2.P transition in solar flares," Astrophys. J. 204, L151–L153 (1976).

J. D. Purcell and K. G. Widing, "Rocket observations of Ar XI–XVI, CaXIV–XVIII and FeXIV, XV, XXIV in the extreme ultraviolet spectrum of a solar flare," Astrophys. J. 176, 239–247 (1972).

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 – TiXIX)," 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).

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).

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 – TiXIX)," 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 – TiXIX)," 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 the 5–950 Å range," J. Sci. Instrum. 42, 94–97 (1965).

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).

Waller, W. A.

A. H. Gabriel, J. R. Swain, and W. A. Waller, "A two-metre grazing incidence spectrometer for use in the 5–950 Å range," J. Sci. Instrum. 42, 94–97 (1965).

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).

K. G. Widing and J. D. Purcell, "The lithium-like 2s2.S-2p 2.P transition in solar flares," Astrophys. J. 204, L151–L153 (1976).

J. D. Purcell and K. G. Widing, "Rocket observations of Ar XI–XVI, CaXIV–XVIII and FeXIV, XV, XXIV in the extreme ultraviolet spectrum of a solar flare," Astrophys. J. 176, 239–247 (1972).

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 NI isoelectronic sequences," Astrophys. J. 188, 417–422 (1974).

U. Feldman, G. A. Doschek, R. D. Cowan, and L. Cohen, "Transitions 2s2 2pk-2s 2pk+1 of the NI, and CI isoelectronic sequences," Astrophys. J. 196, 613–616 (1975).

J. D. Purcell and K. G. Widing, "Rocket observations of Ar XI–XVI, CaXIV–XVIII and FeXIV, XV, XXIV in the extreme ultraviolet spectrum of a solar flare," Astrophys. J. 176, 239–247 (1972).

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).

K. G. Widing and J. D. Purcell, "The lithium-like 2s2.S-2p 2.P transition in solar flares," Astrophys. J. 204, L151–L153 (1976).

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

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

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).

At. Data Nucl. (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).

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).

B. C. Fawcett, A. H. Gabriel, and T. M. Paget, "New observations of spectra of Ar X to XV and isoelectronic lines in Si, P, S, and Cl," J. Phys. B 4, 986–994 (1971).

J. Sci. Instrum. (1)

A. H. Gabriel, J. R. Swain, and W. A. Waller, "A two-metre grazing incidence spectrometer for use in the 5–950 Å range," J. Sci. Instrum. 42, 94–97 (1965).

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: CaXVII; 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: CaXV and CaXIV," 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 – TiXIX)," 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).

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

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).

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, 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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