Abstract

High-resolution spectra of a <sup>232</sup>ThI<sub>4</sub> / <sup>230</sup>ThI<sub>4</sub> electrodeless discharge lamp were obtained from 5600 to 36000 cm<sup>-1</sup> with a Fourier-transform spectrometer. The splittings of more than 2800 Th I isotopic doublets were measured to an accuracy of 0.001 cm<sup>-1</sup>. Level isotope shifts were determined for 274 even and 318 odd levels of Th I.

© 1983 Optical Society of America

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  1. R. Engleman, Jr., and B. A. Palmer, "Precision isotope shifts for the heavy elements. I. Neutral uranium in the visible and near infrared," J. Opt. Soc. Am. 70, 308–317 (1980).
  2. E. A. Vernyi and V. N. Egorov, "Isotopic shift in the spectrum ofthorium Th232–Th229," Opt. Spectrosc. 6, 170 (1959).
  3. E. A. Vernyi and V. N. Egorov, "The isotope effect in the spectrum of thorium," Opt. Spectrosc. 9, 367–371 (1960).
  4. V. N. Egorov, M. F. Korintskaya, and V. K. Markov, "Isolation of the isotope thorium-229 and investigation of its spectroscopic properties," Radiokhim. 11, 542–546 (1969).
  5. G. W. Charles, "Comments on 'The isotope effect in the spectrum of thorium,' " J. Opt. Soc. Am. 54, 267–268 (1964).
  6. G. L. Stukenbroeker and J. R. McNally, Jr., "Isotope shifts in thorium—Th 230 and Th 232," J. Opt. Soc. Am. 43, 36–41 (1953).
  7. J. W. Brault, "Rapid scan high resolution Fourier transform spectrometer for the visible," J. Opt. Soc. Am. 66, 1081 (1976).
  8. B. A. Palmer and R. Engleman, "Atlas of the thorium spectrum,"Los Alamos National Laboratory Rep. LA-9615 (February1983).
  9. R. Zalubas, "Energy levels, classified lines, and Zeeman effect ofneutral thorium," J. Res. Nat. Bur. Stand. U.S. 80A, 221–358 (1976).
  10. R. Zalubas and C. H. Corliss, "Energy levels and classified lines in the second spectrum of thorium (Th II)," J. Res. Nat. Bur. Stand. U.S. 78A, 163–246 (1974).
  11. B. A. Palmer and R. Engleman, "A new program for the least squares calculation of atomic energy levels," Los Alamos National Laboratory Rep. LA-9710 (1983).
  12. A. Giacchetti, J. Blaise, C. H. Corliss, and R. Zalubas, "Proposed secondary wavelength standards and line classifications in thorium spectra between 0.9 and 3 gzm," J. Res. Nat. Bur. Stand. U.S.78A, 247–281 (1974).
  13. R. Zalubas, "Present state of analysis of the first spectrum of thorium (Th I)," J. Opt. Soc. Am. 58,1195–1199 (1968).
  14. J. Blaise and A. Steudel, "Isotopieverschiebungskonstanten von Th, U, Pu, und Am," Z. Phys. 209, 311–328 (1968).
  15. K. Rajnak and M. Fred, "Correlation of isotope shifts with |Ψ(0)2 for actinide configurations," J. Opt. Soc. Am. 67, 1314–1323 (1977).

1980 (1)

1977 (1)

1976 (2)

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

R. Zalubas, "Energy levels, classified lines, and Zeeman effect ofneutral thorium," J. Res. Nat. Bur. Stand. U.S. 80A, 221–358 (1976).

1974 (2)

R. Zalubas and C. H. Corliss, "Energy levels and classified lines in the second spectrum of thorium (Th II)," J. Res. Nat. Bur. Stand. U.S. 78A, 163–246 (1974).

A. Giacchetti, J. Blaise, C. H. Corliss, and R. Zalubas, "Proposed secondary wavelength standards and line classifications in thorium spectra between 0.9 and 3 gzm," J. Res. Nat. Bur. Stand. U.S.78A, 247–281 (1974).

1969 (1)

V. N. Egorov, M. F. Korintskaya, and V. K. Markov, "Isolation of the isotope thorium-229 and investigation of its spectroscopic properties," Radiokhim. 11, 542–546 (1969).

1968 (2)

R. Zalubas, "Present state of analysis of the first spectrum of thorium (Th I)," J. Opt. Soc. Am. 58,1195–1199 (1968).

J. Blaise and A. Steudel, "Isotopieverschiebungskonstanten von Th, U, Pu, und Am," Z. Phys. 209, 311–328 (1968).

1964 (1)

1960 (1)

E. A. Vernyi and V. N. Egorov, "The isotope effect in the spectrum of thorium," Opt. Spectrosc. 9, 367–371 (1960).

1959 (1)

E. A. Vernyi and V. N. Egorov, "Isotopic shift in the spectrum ofthorium Th232–Th229," Opt. Spectrosc. 6, 170 (1959).

1953 (1)

Blaise, J.

A. Giacchetti, J. Blaise, C. H. Corliss, and R. Zalubas, "Proposed secondary wavelength standards and line classifications in thorium spectra between 0.9 and 3 gzm," J. Res. Nat. Bur. Stand. U.S.78A, 247–281 (1974).

J. Blaise and A. Steudel, "Isotopieverschiebungskonstanten von Th, U, Pu, und Am," Z. Phys. 209, 311–328 (1968).

Brault, J. W.

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

Charles, G. W.

Corliss, C. H.

R. Zalubas and C. H. Corliss, "Energy levels and classified lines in the second spectrum of thorium (Th II)," J. Res. Nat. Bur. Stand. U.S. 78A, 163–246 (1974).

A. Giacchetti, J. Blaise, C. H. Corliss, and R. Zalubas, "Proposed secondary wavelength standards and line classifications in thorium spectra between 0.9 and 3 gzm," J. Res. Nat. Bur. Stand. U.S.78A, 247–281 (1974).

Egorov, V. N.

V. N. Egorov, M. F. Korintskaya, and V. K. Markov, "Isolation of the isotope thorium-229 and investigation of its spectroscopic properties," Radiokhim. 11, 542–546 (1969).

E. A. Vernyi and V. N. Egorov, "The isotope effect in the spectrum of thorium," Opt. Spectrosc. 9, 367–371 (1960).

E. A. Vernyi and V. N. Egorov, "Isotopic shift in the spectrum ofthorium Th232–Th229," Opt. Spectrosc. 6, 170 (1959).

Engleman, R.

B. A. Palmer and R. Engleman, "Atlas of the thorium spectrum,"Los Alamos National Laboratory Rep. LA-9615 (February1983).

B. A. Palmer and R. Engleman, "A new program for the least squares calculation of atomic energy levels," Los Alamos National Laboratory Rep. LA-9710 (1983).

Engleman, Jr., R.

Fred, M.

Giacchetti, A.

A. Giacchetti, J. Blaise, C. H. Corliss, and R. Zalubas, "Proposed secondary wavelength standards and line classifications in thorium spectra between 0.9 and 3 gzm," J. Res. Nat. Bur. Stand. U.S.78A, 247–281 (1974).

Korintskaya, M. F.

V. N. Egorov, M. F. Korintskaya, and V. K. Markov, "Isolation of the isotope thorium-229 and investigation of its spectroscopic properties," Radiokhim. 11, 542–546 (1969).

Markov, V. K.

V. N. Egorov, M. F. Korintskaya, and V. K. Markov, "Isolation of the isotope thorium-229 and investigation of its spectroscopic properties," Radiokhim. 11, 542–546 (1969).

McNally, Jr., J. R.

Palmer, B. A.

R. Engleman, Jr., and B. A. Palmer, "Precision isotope shifts for the heavy elements. I. Neutral uranium in the visible and near infrared," J. Opt. Soc. Am. 70, 308–317 (1980).

B. A. Palmer and R. Engleman, "Atlas of the thorium spectrum,"Los Alamos National Laboratory Rep. LA-9615 (February1983).

B. A. Palmer and R. Engleman, "A new program for the least squares calculation of atomic energy levels," Los Alamos National Laboratory Rep. LA-9710 (1983).

Rajnak, K.

Steudel, A.

J. Blaise and A. Steudel, "Isotopieverschiebungskonstanten von Th, U, Pu, und Am," Z. Phys. 209, 311–328 (1968).

Stukenbroeker, G. L.

Vernyi, E. A.

E. A. Vernyi and V. N. Egorov, "The isotope effect in the spectrum of thorium," Opt. Spectrosc. 9, 367–371 (1960).

E. A. Vernyi and V. N. Egorov, "Isotopic shift in the spectrum ofthorium Th232–Th229," Opt. Spectrosc. 6, 170 (1959).

Zalubas, R.

R. Zalubas, "Energy levels, classified lines, and Zeeman effect ofneutral thorium," J. Res. Nat. Bur. Stand. U.S. 80A, 221–358 (1976).

R. Zalubas and C. H. Corliss, "Energy levels and classified lines in the second spectrum of thorium (Th II)," J. Res. Nat. Bur. Stand. U.S. 78A, 163–246 (1974).

A. Giacchetti, J. Blaise, C. H. Corliss, and R. Zalubas, "Proposed secondary wavelength standards and line classifications in thorium spectra between 0.9 and 3 gzm," J. Res. Nat. Bur. Stand. U.S.78A, 247–281 (1974).

R. Zalubas, "Present state of analysis of the first spectrum of thorium (Th I)," J. Opt. Soc. Am. 58,1195–1199 (1968).

J. Opt. Soc. Am. (6)

J. Res. Nat. Bur. Stand. U.S. (3)

A. Giacchetti, J. Blaise, C. H. Corliss, and R. Zalubas, "Proposed secondary wavelength standards and line classifications in thorium spectra between 0.9 and 3 gzm," J. Res. Nat. Bur. Stand. U.S.78A, 247–281 (1974).

R. Zalubas, "Energy levels, classified lines, and Zeeman effect ofneutral thorium," J. Res. Nat. Bur. Stand. U.S. 80A, 221–358 (1976).

R. Zalubas and C. H. Corliss, "Energy levels and classified lines in the second spectrum of thorium (Th II)," J. Res. Nat. Bur. Stand. U.S. 78A, 163–246 (1974).

Opt. Spectrosc. (2)

E. A. Vernyi and V. N. Egorov, "Isotopic shift in the spectrum ofthorium Th232–Th229," Opt. Spectrosc. 6, 170 (1959).

E. A. Vernyi and V. N. Egorov, "The isotope effect in the spectrum of thorium," Opt. Spectrosc. 9, 367–371 (1960).

Radiokhim. (1)

V. N. Egorov, M. F. Korintskaya, and V. K. Markov, "Isolation of the isotope thorium-229 and investigation of its spectroscopic properties," Radiokhim. 11, 542–546 (1969).

Z. Phys. (1)

J. Blaise and A. Steudel, "Isotopieverschiebungskonstanten von Th, U, Pu, und Am," Z. Phys. 209, 311–328 (1968).

Other (2)

B. A. Palmer and R. Engleman, "A new program for the least squares calculation of atomic energy levels," Los Alamos National Laboratory Rep. LA-9710 (1983).

B. A. Palmer and R. Engleman, "Atlas of the thorium spectrum,"Los Alamos National Laboratory Rep. LA-9615 (February1983).

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