Abstract

Relative oscillator strengths for 33 neutral yttrium (Y I) transitions between 2723 and 4761 Å have been measured by the hook method. The data have been analyzed and placed on an absolute scale by using a numerical procedure developed by Cardon, Smith, and Whaling and the published absolute lifetimes of Beer, and Andersen, Ramanujam, and Bahr. The <i>z</i><sup>2</sup><i>F</i>°<sub>5/2</sub> level lifetime of Beer is found to be in error. The absolute lifetime of the level <i>y</i><sup>2</sup><i>P</i>°<sub>3/2</sub> is determined to be 36 ± 4 ns. The total uncertainties in the absolute oscillator strengths are between 9% and 14%.

© 1980 Optical Society of America

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  1. B. L. Cardon, P. L. Smith, and W. Whaling, "New method for determining relative oscillator strengths of atoms through combined absorption and emission measurements: Applications to titanium (TiI)," Phys. Rev. A 20, 2411–2419 (1979).
  2. M. C. E. Huber and W. H. Parkinson, "Fe I oscillator strengths determined from anomalous dispersion of shock-heated gases," Astrophys. J. 172, 229–247 (1972).
  3. M. C. E. Huber, "Interferometric gas diagnostics by the hook method," Modern Optical Methods in Gas Dynamic Research, edited by D. S. Dosanjh (Plenum, New York, 1971), pp. 85–112.
  4. W. H. Parkinson, E. M. Reeves, and F. S. Tomkins, "Neutral calcium, strontium, and barium: Determination of ƒ-values of the principal series by hook method," J. Phys. B 9, 157–165 (1976).
  5. M. C. E. Huber and R. J. Sandeman, "Oscillator Strengths of Cr I Lines Lying Between 200 and 541 nm from Hook-Method and Absorption Measurements in a Furnace," Proc. R. Soc. London Ser. A 357, 335–379 (1977).
  6. H. Beer, "Lebensdauer und Hyperfeinstrukturaufspaltung der Terme 4d5s5p y2D3/2,5/2 und 4d5s5p y2F5/2,7/2 in Yttrium I Spektrum," Ann. Phys. (Leipzig) 7, 110–118 (1971).
  7. T. Andersen, P. S. Ramanujam, and K. Bahr, "Lifetimes of Excited States in Y I, Y II, and Zr I by Beam-Foil and Beam-Sputtering Excitation," Astrophys. J. 223, 344–349 (1978).
  8. C. H. Corliss and W,R. Bozman, "Experimental Transition Probabilities for Spectral Lines of Seventy Elements," NBS Monograph 53, (USGPO, Washington, D.C., 1962).
  9. dex = interval in powers of 10.

1979 (1)

B. L. Cardon, P. L. Smith, and W. Whaling, "New method for determining relative oscillator strengths of atoms through combined absorption and emission measurements: Applications to titanium (TiI)," Phys. Rev. A 20, 2411–2419 (1979).

1978 (1)

T. Andersen, P. S. Ramanujam, and K. Bahr, "Lifetimes of Excited States in Y I, Y II, and Zr I by Beam-Foil and Beam-Sputtering Excitation," Astrophys. J. 223, 344–349 (1978).

1977 (1)

M. C. E. Huber and R. J. Sandeman, "Oscillator Strengths of Cr I Lines Lying Between 200 and 541 nm from Hook-Method and Absorption Measurements in a Furnace," Proc. R. Soc. London Ser. A 357, 335–379 (1977).

1976 (1)

W. H. Parkinson, E. M. Reeves, and F. S. Tomkins, "Neutral calcium, strontium, and barium: Determination of ƒ-values of the principal series by hook method," J. Phys. B 9, 157–165 (1976).

1972 (1)

M. C. E. Huber and W. H. Parkinson, "Fe I oscillator strengths determined from anomalous dispersion of shock-heated gases," Astrophys. J. 172, 229–247 (1972).

1971 (1)

H. Beer, "Lebensdauer und Hyperfeinstrukturaufspaltung der Terme 4d5s5p y2D3/2,5/2 und 4d5s5p y2F5/2,7/2 in Yttrium I Spektrum," Ann. Phys. (Leipzig) 7, 110–118 (1971).

Andersen, T.

T. Andersen, P. S. Ramanujam, and K. Bahr, "Lifetimes of Excited States in Y I, Y II, and Zr I by Beam-Foil and Beam-Sputtering Excitation," Astrophys. J. 223, 344–349 (1978).

Bahr, K.

T. Andersen, P. S. Ramanujam, and K. Bahr, "Lifetimes of Excited States in Y I, Y II, and Zr I by Beam-Foil and Beam-Sputtering Excitation," Astrophys. J. 223, 344–349 (1978).

Beer, H.

H. Beer, "Lebensdauer und Hyperfeinstrukturaufspaltung der Terme 4d5s5p y2D3/2,5/2 und 4d5s5p y2F5/2,7/2 in Yttrium I Spektrum," Ann. Phys. (Leipzig) 7, 110–118 (1971).

Bozman, W. R.

C. H. Corliss and W,R. Bozman, "Experimental Transition Probabilities for Spectral Lines of Seventy Elements," NBS Monograph 53, (USGPO, Washington, D.C., 1962).

Cardon, B. L.

B. L. Cardon, P. L. Smith, and W. Whaling, "New method for determining relative oscillator strengths of atoms through combined absorption and emission measurements: Applications to titanium (TiI)," Phys. Rev. A 20, 2411–2419 (1979).

Corliss, C. H.

C. H. Corliss and W,R. Bozman, "Experimental Transition Probabilities for Spectral Lines of Seventy Elements," NBS Monograph 53, (USGPO, Washington, D.C., 1962).

Huber, M. C. E.

M. C. E. Huber and R. J. Sandeman, "Oscillator Strengths of Cr I Lines Lying Between 200 and 541 nm from Hook-Method and Absorption Measurements in a Furnace," Proc. R. Soc. London Ser. A 357, 335–379 (1977).

M. C. E. Huber and W. H. Parkinson, "Fe I oscillator strengths determined from anomalous dispersion of shock-heated gases," Astrophys. J. 172, 229–247 (1972).

M. C. E. Huber, "Interferometric gas diagnostics by the hook method," Modern Optical Methods in Gas Dynamic Research, edited by D. S. Dosanjh (Plenum, New York, 1971), pp. 85–112.

Parkinson, W. H.

W. H. Parkinson, E. M. Reeves, and F. S. Tomkins, "Neutral calcium, strontium, and barium: Determination of ƒ-values of the principal series by hook method," J. Phys. B 9, 157–165 (1976).

M. C. E. Huber and W. H. Parkinson, "Fe I oscillator strengths determined from anomalous dispersion of shock-heated gases," Astrophys. J. 172, 229–247 (1972).

Ramanujam, P. S.

T. Andersen, P. S. Ramanujam, and K. Bahr, "Lifetimes of Excited States in Y I, Y II, and Zr I by Beam-Foil and Beam-Sputtering Excitation," Astrophys. J. 223, 344–349 (1978).

Reeves, E. M.

W. H. Parkinson, E. M. Reeves, and F. S. Tomkins, "Neutral calcium, strontium, and barium: Determination of ƒ-values of the principal series by hook method," J. Phys. B 9, 157–165 (1976).

Sandeman, R. J.

M. C. E. Huber and R. J. Sandeman, "Oscillator Strengths of Cr I Lines Lying Between 200 and 541 nm from Hook-Method and Absorption Measurements in a Furnace," Proc. R. Soc. London Ser. A 357, 335–379 (1977).

Smith, P. L.

B. L. Cardon, P. L. Smith, and W. Whaling, "New method for determining relative oscillator strengths of atoms through combined absorption and emission measurements: Applications to titanium (TiI)," Phys. Rev. A 20, 2411–2419 (1979).

Tomkins, F. S.

W. H. Parkinson, E. M. Reeves, and F. S. Tomkins, "Neutral calcium, strontium, and barium: Determination of ƒ-values of the principal series by hook method," J. Phys. B 9, 157–165 (1976).

Whaling, W.

B. L. Cardon, P. L. Smith, and W. Whaling, "New method for determining relative oscillator strengths of atoms through combined absorption and emission measurements: Applications to titanium (TiI)," Phys. Rev. A 20, 2411–2419 (1979).

Ann. Phys. (1)

H. Beer, "Lebensdauer und Hyperfeinstrukturaufspaltung der Terme 4d5s5p y2D3/2,5/2 und 4d5s5p y2F5/2,7/2 in Yttrium I Spektrum," Ann. Phys. (Leipzig) 7, 110–118 (1971).

Astrophys. J. (2)

T. Andersen, P. S. Ramanujam, and K. Bahr, "Lifetimes of Excited States in Y I, Y II, and Zr I by Beam-Foil and Beam-Sputtering Excitation," Astrophys. J. 223, 344–349 (1978).

M. C. E. Huber and W. H. Parkinson, "Fe I oscillator strengths determined from anomalous dispersion of shock-heated gases," Astrophys. J. 172, 229–247 (1972).

J. Phys. B (1)

W. H. Parkinson, E. M. Reeves, and F. S. Tomkins, "Neutral calcium, strontium, and barium: Determination of ƒ-values of the principal series by hook method," J. Phys. B 9, 157–165 (1976).

Phys. Rev. A (1)

B. L. Cardon, P. L. Smith, and W. Whaling, "New method for determining relative oscillator strengths of atoms through combined absorption and emission measurements: Applications to titanium (TiI)," Phys. Rev. A 20, 2411–2419 (1979).

Proc. R. Soc. London Ser. A (1)

M. C. E. Huber and R. J. Sandeman, "Oscillator Strengths of Cr I Lines Lying Between 200 and 541 nm from Hook-Method and Absorption Measurements in a Furnace," Proc. R. Soc. London Ser. A 357, 335–379 (1977).

Other (3)

M. C. E. Huber, "Interferometric gas diagnostics by the hook method," Modern Optical Methods in Gas Dynamic Research, edited by D. S. Dosanjh (Plenum, New York, 1971), pp. 85–112.

C. H. Corliss and W,R. Bozman, "Experimental Transition Probabilities for Spectral Lines of Seventy Elements," NBS Monograph 53, (USGPO, Washington, D.C., 1962).

dex = interval in powers of 10.

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