Abstract

We use time-resolved laser-induced fluorescence to measure the lifetime of 186 Fe i levels with energies between 25 900 and 60 758 cm−1. Measured emission branching fractions for these levels yield transition probabilities for 1174 transitions in the range 225–2666 nm. We find another 640 Fe i transition probabilities by interpolating level populations in the inductively coupled plasma spectral source. We demonstrate the reliability of the interpolation method by comparing our transition probabilities with absorption oscillator strengths measured by the Oxford group [ Blackwell et al.., Mon. Not. R. Astron. Soc. 201, 595– 602 ( 1982)]. We derive precise Fe i level energies to support the automated method that is used to identify transitions in our spectra.

© 1991 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. W. Whaling, J. W. Brault, “Comprehensive transition probabilities in Mo i,” Phys. Scr. 38, 707–718 (1988).
    [CrossRef]
  2. D. E. Blackwell, A. D. Petford, G. J. Simmons, “Measurements of relative oscillator strengths for Fe i,” Mon. Not. R. Astron. Soc. 201, 595–602 (1982), and references therein.
  3. J. R. Fuhr, G. A. Martin, W. L. Wiese, “Atomic transition probabilities: Fe through Ni,” J. Phys. Chem. Ref. Data 17, Suppl. 4 (1988).
  4. R. L. Kurucz, “Semi-empirical calculation of gf-values for the iron group,” Trans. Int. Astron. Union B 20, 168–172 (1990); magnetic tape data.
  5. J. Sugar, C. Corliss, “Atomic energy levels of the iron-period elements: K through Ni,” J. Phys. Chem. Ref. Data 14, Suppl. 2 (1985).
  6. J. E. Lawler in Lasers, Spectroscopy, and New Ideas: A Tribute to Arthur L. Schawlow, W. M. Yen, M. D. Levenson, eds., Vol. 54 of the Springer Series in Optical Sciences (Springer, New York, 1988), p. 125–140.
  7. D. W. Duquette, J. E. Lawler, “Radiative lifetimes in NbI,” Phys. Rev. A 26, 330–334 (1982).
    [CrossRef]
  8. S. Salih, J. E. Lawler, W. Whaling, “Lifetimes, branching ratios, and transition probabilities in Co ii,” Phys. Rev. A 31, 744–749 (1985).
    [CrossRef] [PubMed]
  9. G. C. Marsden, E. A. Den Hartog, J. E. Lawler, J. T. Dakin, V. D. Roberts, “Radiative lifetimes of even- and odd-parity levels in Sc i and Sc ii,” J. Opt. Soc. Am. B 5, 606–613 (1988).
    [CrossRef]
  10. H. Figger, K. Siomos, H. Walther, “Lifetime measurements in the Fe spectrum using tunable dye laser excitation,” Z. Phys. 270, 371–376 (1974).
    [CrossRef]
  11. J. Marek, J. Richter, H. J. Stahnke, “Radiatives lifetimes of some Fe i levels,” Phys. Scr. 19, 325–327 (1979).
    [CrossRef]
  12. P. Hannaford, R. M. Lowe, “Determination of atomic lifetimes using pulsed laser excitation of sputtered metal vapours,” J. Phys. B 14, L5–L9 (1981).
    [CrossRef]
  13. H. Figger, J. Heldt, K. Siomos, H. Walther, “Lifetime measurements in the Co i and Fe i spectra using tunable dye laser excitation,” Astron. Astrophys. 43, 389–394 (1975).
  14. J. Carlsson, L. Sturesson, S. Svanberg, “Accurate time-resolved laser spectroscopy on sputtered metal atoms,” Z. Phys. D 11, 287–293 (1989).
    [CrossRef]
  15. K. Siomos, H. Figger, H. Walther, “Lifetime measurements in the Fe i spectrum using stepwise excitation by dye lasers,” Z. Phys. A 272, 355–358 (1975).
    [CrossRef]
  16. J. W. Brault, “Rapid-scan high-resolution Fourier spectrometer for the visible,” J. Opt. Soc. Am. 66, 1081 (1976).
  17. B. A. Palmer, M. V. Phillips, R. Engleman, “The infrared emission spectrum of U and Th,” Proc. Soc. Photo-Opt. Instrum. Eng. 380, 415–435 (1983).
  18. W. L. Wiese, J. W. Brault, K. Danzmann, V. Helbig, M. Kock, “Unified set of atomic transition probabilities for neutral argon,” Phys. Rev. A 39, 2461–2471 (1989).
    [CrossRef] [PubMed]
  19. J. A. Fernley, K. T. Taylor, M. J. Seaton, “Atomic data for opacity calculations,” J. Phys. B 20, 6457–6476 (1987).
    [CrossRef]
  20. L. M. Faires, B. A. Palmer, J. W. Brault, “Line width and line shape analysis in the ICP by high-resolution FT spectrometry,” Spectrochim. Acta 40B, 135–145 (1985).
  21. M. Kock, S. Kroll, S. Schnehage, “Fe i oscillator strengths,” Phys. Scri. T8, 84–87 (1984).
    [CrossRef]
  22. B. A. Palmer, R. Engleman, “A new program for the least squares calculation of atomic energy levels,” Report LA-9710 (Los Alamos National Laboratory, Los Alamos, N. Mex., 1983).
  23. J. W. Brault, in R. S. Booth, J. W. Brault, A. Labeyrie, High Resolution in Astronomy (Geneva Observatory, Geneva, 1985).
  24. R. C. M. Learner, A. P. Thorne, “Wavelength calibration of Fourier transform emission spectra with applications to Fe i,” J. Opt. Soc. Am. B 5, 2045–2059 (1988).
    [CrossRef]
  25. G. Norlén, “Wavelengths and energy levels of Ar i and Ar ii based on new interferometric measurements in the region 3400–9800 A,” Phys. Scr. 8, 249–268 (1973).
    [CrossRef]
  26. C. M. Brown, M. L. Ginter, S. Johansson, S. G. Tilford, “Absorption spectra of Fe i in the 1550–3215-Å region,” J. Opt. Soc. Am. B 5, 2125–2158 (1988).
    [CrossRef]
  27. S. E. Johansson, Department of Physics, University of Lund, Sölvegatan 14, S223 62 Lund, Sweden (personal communication).

1990 (1)

R. L. Kurucz, “Semi-empirical calculation of gf-values for the iron group,” Trans. Int. Astron. Union B 20, 168–172 (1990); magnetic tape data.

1989 (2)

J. Carlsson, L. Sturesson, S. Svanberg, “Accurate time-resolved laser spectroscopy on sputtered metal atoms,” Z. Phys. D 11, 287–293 (1989).
[CrossRef]

W. L. Wiese, J. W. Brault, K. Danzmann, V. Helbig, M. Kock, “Unified set of atomic transition probabilities for neutral argon,” Phys. Rev. A 39, 2461–2471 (1989).
[CrossRef] [PubMed]

1988 (5)

1987 (1)

J. A. Fernley, K. T. Taylor, M. J. Seaton, “Atomic data for opacity calculations,” J. Phys. B 20, 6457–6476 (1987).
[CrossRef]

1985 (3)

L. M. Faires, B. A. Palmer, J. W. Brault, “Line width and line shape analysis in the ICP by high-resolution FT spectrometry,” Spectrochim. Acta 40B, 135–145 (1985).

S. Salih, J. E. Lawler, W. Whaling, “Lifetimes, branching ratios, and transition probabilities in Co ii,” Phys. Rev. A 31, 744–749 (1985).
[CrossRef] [PubMed]

J. Sugar, C. Corliss, “Atomic energy levels of the iron-period elements: K through Ni,” J. Phys. Chem. Ref. Data 14, Suppl. 2 (1985).

1984 (1)

M. Kock, S. Kroll, S. Schnehage, “Fe i oscillator strengths,” Phys. Scri. T8, 84–87 (1984).
[CrossRef]

1983 (1)

B. A. Palmer, M. V. Phillips, R. Engleman, “The infrared emission spectrum of U and Th,” Proc. Soc. Photo-Opt. Instrum. Eng. 380, 415–435 (1983).

1982 (2)

D. W. Duquette, J. E. Lawler, “Radiative lifetimes in NbI,” Phys. Rev. A 26, 330–334 (1982).
[CrossRef]

D. E. Blackwell, A. D. Petford, G. J. Simmons, “Measurements of relative oscillator strengths for Fe i,” Mon. Not. R. Astron. Soc. 201, 595–602 (1982), and references therein.

1981 (1)

P. Hannaford, R. M. Lowe, “Determination of atomic lifetimes using pulsed laser excitation of sputtered metal vapours,” J. Phys. B 14, L5–L9 (1981).
[CrossRef]

1979 (1)

J. Marek, J. Richter, H. J. Stahnke, “Radiatives lifetimes of some Fe i levels,” Phys. Scr. 19, 325–327 (1979).
[CrossRef]

1976 (1)

J. W. Brault, “Rapid-scan high-resolution Fourier spectrometer for the visible,” J. Opt. Soc. Am. 66, 1081 (1976).

1975 (2)

H. Figger, J. Heldt, K. Siomos, H. Walther, “Lifetime measurements in the Co i and Fe i spectra using tunable dye laser excitation,” Astron. Astrophys. 43, 389–394 (1975).

K. Siomos, H. Figger, H. Walther, “Lifetime measurements in the Fe i spectrum using stepwise excitation by dye lasers,” Z. Phys. A 272, 355–358 (1975).
[CrossRef]

1974 (1)

H. Figger, K. Siomos, H. Walther, “Lifetime measurements in the Fe spectrum using tunable dye laser excitation,” Z. Phys. 270, 371–376 (1974).
[CrossRef]

1973 (1)

G. Norlén, “Wavelengths and energy levels of Ar i and Ar ii based on new interferometric measurements in the region 3400–9800 A,” Phys. Scr. 8, 249–268 (1973).
[CrossRef]

Blackwell, D. E.

D. E. Blackwell, A. D. Petford, G. J. Simmons, “Measurements of relative oscillator strengths for Fe i,” Mon. Not. R. Astron. Soc. 201, 595–602 (1982), and references therein.

Brault, J. W.

W. L. Wiese, J. W. Brault, K. Danzmann, V. Helbig, M. Kock, “Unified set of atomic transition probabilities for neutral argon,” Phys. Rev. A 39, 2461–2471 (1989).
[CrossRef] [PubMed]

W. Whaling, J. W. Brault, “Comprehensive transition probabilities in Mo i,” Phys. Scr. 38, 707–718 (1988).
[CrossRef]

L. M. Faires, B. A. Palmer, J. W. Brault, “Line width and line shape analysis in the ICP by high-resolution FT spectrometry,” Spectrochim. Acta 40B, 135–145 (1985).

J. W. Brault, “Rapid-scan high-resolution Fourier spectrometer for the visible,” J. Opt. Soc. Am. 66, 1081 (1976).

J. W. Brault, in R. S. Booth, J. W. Brault, A. Labeyrie, High Resolution in Astronomy (Geneva Observatory, Geneva, 1985).

Brown, C. M.

Carlsson, J.

J. Carlsson, L. Sturesson, S. Svanberg, “Accurate time-resolved laser spectroscopy on sputtered metal atoms,” Z. Phys. D 11, 287–293 (1989).
[CrossRef]

Corliss, C.

J. Sugar, C. Corliss, “Atomic energy levels of the iron-period elements: K through Ni,” J. Phys. Chem. Ref. Data 14, Suppl. 2 (1985).

Dakin, J. T.

Danzmann, K.

W. L. Wiese, J. W. Brault, K. Danzmann, V. Helbig, M. Kock, “Unified set of atomic transition probabilities for neutral argon,” Phys. Rev. A 39, 2461–2471 (1989).
[CrossRef] [PubMed]

Den Hartog, E. A.

Duquette, D. W.

D. W. Duquette, J. E. Lawler, “Radiative lifetimes in NbI,” Phys. Rev. A 26, 330–334 (1982).
[CrossRef]

Engleman, R.

B. A. Palmer, M. V. Phillips, R. Engleman, “The infrared emission spectrum of U and Th,” Proc. Soc. Photo-Opt. Instrum. Eng. 380, 415–435 (1983).

B. A. Palmer, R. Engleman, “A new program for the least squares calculation of atomic energy levels,” Report LA-9710 (Los Alamos National Laboratory, Los Alamos, N. Mex., 1983).

Faires, L. M.

L. M. Faires, B. A. Palmer, J. W. Brault, “Line width and line shape analysis in the ICP by high-resolution FT spectrometry,” Spectrochim. Acta 40B, 135–145 (1985).

Fernley, J. A.

J. A. Fernley, K. T. Taylor, M. J. Seaton, “Atomic data for opacity calculations,” J. Phys. B 20, 6457–6476 (1987).
[CrossRef]

Figger, H.

K. Siomos, H. Figger, H. Walther, “Lifetime measurements in the Fe i spectrum using stepwise excitation by dye lasers,” Z. Phys. A 272, 355–358 (1975).
[CrossRef]

H. Figger, J. Heldt, K. Siomos, H. Walther, “Lifetime measurements in the Co i and Fe i spectra using tunable dye laser excitation,” Astron. Astrophys. 43, 389–394 (1975).

H. Figger, K. Siomos, H. Walther, “Lifetime measurements in the Fe spectrum using tunable dye laser excitation,” Z. Phys. 270, 371–376 (1974).
[CrossRef]

Fuhr, J. R.

J. R. Fuhr, G. A. Martin, W. L. Wiese, “Atomic transition probabilities: Fe through Ni,” J. Phys. Chem. Ref. Data 17, Suppl. 4 (1988).

Ginter, M. L.

Hannaford, P.

P. Hannaford, R. M. Lowe, “Determination of atomic lifetimes using pulsed laser excitation of sputtered metal vapours,” J. Phys. B 14, L5–L9 (1981).
[CrossRef]

Helbig, V.

W. L. Wiese, J. W. Brault, K. Danzmann, V. Helbig, M. Kock, “Unified set of atomic transition probabilities for neutral argon,” Phys. Rev. A 39, 2461–2471 (1989).
[CrossRef] [PubMed]

Heldt, J.

H. Figger, J. Heldt, K. Siomos, H. Walther, “Lifetime measurements in the Co i and Fe i spectra using tunable dye laser excitation,” Astron. Astrophys. 43, 389–394 (1975).

Johansson, S.

Johansson, S. E.

S. E. Johansson, Department of Physics, University of Lund, Sölvegatan 14, S223 62 Lund, Sweden (personal communication).

Kock, M.

W. L. Wiese, J. W. Brault, K. Danzmann, V. Helbig, M. Kock, “Unified set of atomic transition probabilities for neutral argon,” Phys. Rev. A 39, 2461–2471 (1989).
[CrossRef] [PubMed]

M. Kock, S. Kroll, S. Schnehage, “Fe i oscillator strengths,” Phys. Scri. T8, 84–87 (1984).
[CrossRef]

Kroll, S.

M. Kock, S. Kroll, S. Schnehage, “Fe i oscillator strengths,” Phys. Scri. T8, 84–87 (1984).
[CrossRef]

Kurucz, R. L.

R. L. Kurucz, “Semi-empirical calculation of gf-values for the iron group,” Trans. Int. Astron. Union B 20, 168–172 (1990); magnetic tape data.

Lawler, J. E.

G. C. Marsden, E. A. Den Hartog, J. E. Lawler, J. T. Dakin, V. D. Roberts, “Radiative lifetimes of even- and odd-parity levels in Sc i and Sc ii,” J. Opt. Soc. Am. B 5, 606–613 (1988).
[CrossRef]

S. Salih, J. E. Lawler, W. Whaling, “Lifetimes, branching ratios, and transition probabilities in Co ii,” Phys. Rev. A 31, 744–749 (1985).
[CrossRef] [PubMed]

D. W. Duquette, J. E. Lawler, “Radiative lifetimes in NbI,” Phys. Rev. A 26, 330–334 (1982).
[CrossRef]

J. E. Lawler in Lasers, Spectroscopy, and New Ideas: A Tribute to Arthur L. Schawlow, W. M. Yen, M. D. Levenson, eds., Vol. 54 of the Springer Series in Optical Sciences (Springer, New York, 1988), p. 125–140.

Learner, R. C. M.

Lowe, R. M.

P. Hannaford, R. M. Lowe, “Determination of atomic lifetimes using pulsed laser excitation of sputtered metal vapours,” J. Phys. B 14, L5–L9 (1981).
[CrossRef]

Marek, J.

J. Marek, J. Richter, H. J. Stahnke, “Radiatives lifetimes of some Fe i levels,” Phys. Scr. 19, 325–327 (1979).
[CrossRef]

Marsden, G. C.

Martin, G. A.

J. R. Fuhr, G. A. Martin, W. L. Wiese, “Atomic transition probabilities: Fe through Ni,” J. Phys. Chem. Ref. Data 17, Suppl. 4 (1988).

Norlén, G.

G. Norlén, “Wavelengths and energy levels of Ar i and Ar ii based on new interferometric measurements in the region 3400–9800 A,” Phys. Scr. 8, 249–268 (1973).
[CrossRef]

Palmer, B. A.

L. M. Faires, B. A. Palmer, J. W. Brault, “Line width and line shape analysis in the ICP by high-resolution FT spectrometry,” Spectrochim. Acta 40B, 135–145 (1985).

B. A. Palmer, M. V. Phillips, R. Engleman, “The infrared emission spectrum of U and Th,” Proc. Soc. Photo-Opt. Instrum. Eng. 380, 415–435 (1983).

B. A. Palmer, R. Engleman, “A new program for the least squares calculation of atomic energy levels,” Report LA-9710 (Los Alamos National Laboratory, Los Alamos, N. Mex., 1983).

Petford, A. D.

D. E. Blackwell, A. D. Petford, G. J. Simmons, “Measurements of relative oscillator strengths for Fe i,” Mon. Not. R. Astron. Soc. 201, 595–602 (1982), and references therein.

Phillips, M. V.

B. A. Palmer, M. V. Phillips, R. Engleman, “The infrared emission spectrum of U and Th,” Proc. Soc. Photo-Opt. Instrum. Eng. 380, 415–435 (1983).

Richter, J.

J. Marek, J. Richter, H. J. Stahnke, “Radiatives lifetimes of some Fe i levels,” Phys. Scr. 19, 325–327 (1979).
[CrossRef]

Roberts, V. D.

Salih, S.

S. Salih, J. E. Lawler, W. Whaling, “Lifetimes, branching ratios, and transition probabilities in Co ii,” Phys. Rev. A 31, 744–749 (1985).
[CrossRef] [PubMed]

Schnehage, S.

M. Kock, S. Kroll, S. Schnehage, “Fe i oscillator strengths,” Phys. Scri. T8, 84–87 (1984).
[CrossRef]

Seaton, M. J.

J. A. Fernley, K. T. Taylor, M. J. Seaton, “Atomic data for opacity calculations,” J. Phys. B 20, 6457–6476 (1987).
[CrossRef]

Simmons, G. J.

D. E. Blackwell, A. D. Petford, G. J. Simmons, “Measurements of relative oscillator strengths for Fe i,” Mon. Not. R. Astron. Soc. 201, 595–602 (1982), and references therein.

Siomos, K.

H. Figger, J. Heldt, K. Siomos, H. Walther, “Lifetime measurements in the Co i and Fe i spectra using tunable dye laser excitation,” Astron. Astrophys. 43, 389–394 (1975).

K. Siomos, H. Figger, H. Walther, “Lifetime measurements in the Fe i spectrum using stepwise excitation by dye lasers,” Z. Phys. A 272, 355–358 (1975).
[CrossRef]

H. Figger, K. Siomos, H. Walther, “Lifetime measurements in the Fe spectrum using tunable dye laser excitation,” Z. Phys. 270, 371–376 (1974).
[CrossRef]

Stahnke, H. J.

J. Marek, J. Richter, H. J. Stahnke, “Radiatives lifetimes of some Fe i levels,” Phys. Scr. 19, 325–327 (1979).
[CrossRef]

Sturesson, L.

J. Carlsson, L. Sturesson, S. Svanberg, “Accurate time-resolved laser spectroscopy on sputtered metal atoms,” Z. Phys. D 11, 287–293 (1989).
[CrossRef]

Sugar, J.

J. Sugar, C. Corliss, “Atomic energy levels of the iron-period elements: K through Ni,” J. Phys. Chem. Ref. Data 14, Suppl. 2 (1985).

Svanberg, S.

J. Carlsson, L. Sturesson, S. Svanberg, “Accurate time-resolved laser spectroscopy on sputtered metal atoms,” Z. Phys. D 11, 287–293 (1989).
[CrossRef]

Taylor, K. T.

J. A. Fernley, K. T. Taylor, M. J. Seaton, “Atomic data for opacity calculations,” J. Phys. B 20, 6457–6476 (1987).
[CrossRef]

Thorne, A. P.

Tilford, S. G.

Walther, H.

K. Siomos, H. Figger, H. Walther, “Lifetime measurements in the Fe i spectrum using stepwise excitation by dye lasers,” Z. Phys. A 272, 355–358 (1975).
[CrossRef]

H. Figger, J. Heldt, K. Siomos, H. Walther, “Lifetime measurements in the Co i and Fe i spectra using tunable dye laser excitation,” Astron. Astrophys. 43, 389–394 (1975).

H. Figger, K. Siomos, H. Walther, “Lifetime measurements in the Fe spectrum using tunable dye laser excitation,” Z. Phys. 270, 371–376 (1974).
[CrossRef]

Whaling, W.

W. Whaling, J. W. Brault, “Comprehensive transition probabilities in Mo i,” Phys. Scr. 38, 707–718 (1988).
[CrossRef]

S. Salih, J. E. Lawler, W. Whaling, “Lifetimes, branching ratios, and transition probabilities in Co ii,” Phys. Rev. A 31, 744–749 (1985).
[CrossRef] [PubMed]

Wiese, W. L.

W. L. Wiese, J. W. Brault, K. Danzmann, V. Helbig, M. Kock, “Unified set of atomic transition probabilities for neutral argon,” Phys. Rev. A 39, 2461–2471 (1989).
[CrossRef] [PubMed]

J. R. Fuhr, G. A. Martin, W. L. Wiese, “Atomic transition probabilities: Fe through Ni,” J. Phys. Chem. Ref. Data 17, Suppl. 4 (1988).

Astron. Astrophys. (1)

H. Figger, J. Heldt, K. Siomos, H. Walther, “Lifetime measurements in the Co i and Fe i spectra using tunable dye laser excitation,” Astron. Astrophys. 43, 389–394 (1975).

J. Opt. Soc. Am. (1)

J. W. Brault, “Rapid-scan high-resolution Fourier spectrometer for the visible,” J. Opt. Soc. Am. 66, 1081 (1976).

J. Opt. Soc. Am. B (3)

J. Phys. B (2)

J. A. Fernley, K. T. Taylor, M. J. Seaton, “Atomic data for opacity calculations,” J. Phys. B 20, 6457–6476 (1987).
[CrossRef]

P. Hannaford, R. M. Lowe, “Determination of atomic lifetimes using pulsed laser excitation of sputtered metal vapours,” J. Phys. B 14, L5–L9 (1981).
[CrossRef]

J. Phys. Chem. Ref. Data (2)

J. R. Fuhr, G. A. Martin, W. L. Wiese, “Atomic transition probabilities: Fe through Ni,” J. Phys. Chem. Ref. Data 17, Suppl. 4 (1988).

J. Sugar, C. Corliss, “Atomic energy levels of the iron-period elements: K through Ni,” J. Phys. Chem. Ref. Data 14, Suppl. 2 (1985).

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

D. E. Blackwell, A. D. Petford, G. J. Simmons, “Measurements of relative oscillator strengths for Fe i,” Mon. Not. R. Astron. Soc. 201, 595–602 (1982), and references therein.

Phys. Rev. A (3)

D. W. Duquette, J. E. Lawler, “Radiative lifetimes in NbI,” Phys. Rev. A 26, 330–334 (1982).
[CrossRef]

S. Salih, J. E. Lawler, W. Whaling, “Lifetimes, branching ratios, and transition probabilities in Co ii,” Phys. Rev. A 31, 744–749 (1985).
[CrossRef] [PubMed]

W. L. Wiese, J. W. Brault, K. Danzmann, V. Helbig, M. Kock, “Unified set of atomic transition probabilities for neutral argon,” Phys. Rev. A 39, 2461–2471 (1989).
[CrossRef] [PubMed]

Phys. Scr. (3)

J. Marek, J. Richter, H. J. Stahnke, “Radiatives lifetimes of some Fe i levels,” Phys. Scr. 19, 325–327 (1979).
[CrossRef]

W. Whaling, J. W. Brault, “Comprehensive transition probabilities in Mo i,” Phys. Scr. 38, 707–718 (1988).
[CrossRef]

G. Norlén, “Wavelengths and energy levels of Ar i and Ar ii based on new interferometric measurements in the region 3400–9800 A,” Phys. Scr. 8, 249–268 (1973).
[CrossRef]

Phys. Scri. (1)

M. Kock, S. Kroll, S. Schnehage, “Fe i oscillator strengths,” Phys. Scri. T8, 84–87 (1984).
[CrossRef]

Proc. Soc. Photo-Opt. Instrum. Eng. (1)

B. A. Palmer, M. V. Phillips, R. Engleman, “The infrared emission spectrum of U and Th,” Proc. Soc. Photo-Opt. Instrum. Eng. 380, 415–435 (1983).

Spectrochim. Acta (1)

L. M. Faires, B. A. Palmer, J. W. Brault, “Line width and line shape analysis in the ICP by high-resolution FT spectrometry,” Spectrochim. Acta 40B, 135–145 (1985).

Trans. Int. Astron. Union B (1)

R. L. Kurucz, “Semi-empirical calculation of gf-values for the iron group,” Trans. Int. Astron. Union B 20, 168–172 (1990); magnetic tape data.

Z. Phys. (1)

H. Figger, K. Siomos, H. Walther, “Lifetime measurements in the Fe spectrum using tunable dye laser excitation,” Z. Phys. 270, 371–376 (1974).
[CrossRef]

Z. Phys. A (1)

K. Siomos, H. Figger, H. Walther, “Lifetime measurements in the Fe i spectrum using stepwise excitation by dye lasers,” Z. Phys. A 272, 355–358 (1975).
[CrossRef]

Z. Phys. D (1)

J. Carlsson, L. Sturesson, S. Svanberg, “Accurate time-resolved laser spectroscopy on sputtered metal atoms,” Z. Phys. D 11, 287–293 (1989).
[CrossRef]

Other (4)

J. E. Lawler in Lasers, Spectroscopy, and New Ideas: A Tribute to Arthur L. Schawlow, W. M. Yen, M. D. Levenson, eds., Vol. 54 of the Springer Series in Optical Sciences (Springer, New York, 1988), p. 125–140.

B. A. Palmer, R. Engleman, “A new program for the least squares calculation of atomic energy levels,” Report LA-9710 (Los Alamos National Laboratory, Los Alamos, N. Mex., 1983).

J. W. Brault, in R. S. Booth, J. W. Brault, A. Labeyrie, High Resolution in Astronomy (Geneva Observatory, Geneva, 1985).

S. E. Johansson, Department of Physics, University of Lund, Sölvegatan 14, S223 62 Lund, Sweden (personal communication).

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (6)

Fig. 1
Fig. 1

Schematic diagram of the laser fluorescence apparatus.

Fig. 2
Fig. 2

Logarithm (base e) of the mean relative population per state N ¯ u in an ICP spectrum containing a trace of Fe(CO)5 as a function of level energy. The line segment is a least-squares fit to the population per state of levels above 45 000 cm−1

Fig. 3
Fig. 3

Difference between ln( N ¯) and the least-squares linear fit as a function of level energy, shown here as a horizontal line. The line segment shown for spectrum 26 is the same line as that drawn in Fig. 2; it represents a temperature of 7023 K. Populations per state of the levels represented by open circles were evaluated with gf values of Blackwell et al.2

Fig. 4
Fig. 4

Ratio of the Oxford transition probability measured in absorption to our value measured in emission for 163 ines. Pluses represent measurements by the lifetime method; circles represent measurements by interpolated level population.

Fig. 5
Fig. 5

Ratios from Fig. 4 plotted as a function of lower level energy. Only the strongest 66 lines with uncertainty in Aemis ≤ 6% are shown. The low point at 18378 cm−1 was ignored for computation of the mean value shown.

Fig. 6
Fig. 6

Ratio of semiempirical transition probabilities computed by Kurucz4 to our experimental values. Mean of 1117 values is 0.93. Two thirds of the theoretical values lie within a factor of 3 of the experimental values.

Tables (3)

Tables Icon

Table 1 Radiative Lifetime of Fe i Levels*

Tables Icon

Table 2 Transition Probability for 478 Strong Lines in Fe i*

Tables Icon

Table 3 Fe i Level Energy*

Equations (3)

Equations on this page are rendered with MathJax. Learn more.

A u l = BF u l / τ u ,
Δ [ R ( λ l ) / R ( λ l ) ] = 10 - 5 ( λ l - λ l ) [ R ( λ l ) / R ( λ l ) ] ,
I ( λ ) = N u g A ( λ ) ,

Metrics