Abstract

Radiative lifetimes measured with time-resolved laser-induced fluorescence are reported for 39 odd-parity levels and 42 even-parity levels of Ho i and 37 even-parity levels of Ho ii. The levels of Ho i range in energy from 17 000 to 41 000 cm-1, and those of Ho ii from 20 000 to 38 000 cm-1. These lifetimes, with some exceptions, are accurate to ±5%.

© 1999 Optical Society of America

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    [CrossRef]
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  26. V. N. Gorshkov and V. A. Komarovskii, “Lifetimes of excited levels and oscillator strengths of Ho I and Ho II spectral lines,” Opt. Spectrosc. (USSR) 47, 350–351 (1979).
  27. T. Worm, P. Shi, and O. Poulsen, “Lifetimes and hyperfine structures in Ho II,” Phys. Scr. 42, 569–573 (1990).
    [CrossRef]

1997

S. Kröger, J.-F. Wyart, and P. Luc, “Theoretical interpretation of hyperfine structures in doubly-excited configurations 4f105d6s6p and 4f105d26s and new energy levels in neutral holmium (Ho I),” Phys. Scr. 55, 579–585 (1997).
[CrossRef]

M. E. Wickliffe and J. E. Lawler, “Atomic transition probabilities for Tm I and Tm II,” J. Opt. Soc. Am. B 14, 737–753 (1997).
[CrossRef]

J. J. Curry, E. A. Den Hartog, and J. E. Lawler, “Radiative lifetimes of Dy I and Dy II,” J. Opt. Soc. Am. B 14, 2788–2799 (1997).
[CrossRef]

1996

H. M. Anderson, E. A. Den Hartog, and J. E. Lawler, “Radiative lifetimes in Tm I and Tm II,” J. Opt. Soc. Am. B 13, 2382–2391 (1996).
[CrossRef]

C. Sneden, A. McWilliam, G. W. Preston, J. J. Cowan, D. L. Burris, and B. J. Armosky, “The ultra-metal-poor, neutron-capture-rich giant star CS 22892–052,” Astrophys. J. 467, 819–840 (1996).
[CrossRef]

J. J. Cowan, C. Sneden, J. W. Truran, and D. L. Burris, “First detection of platinum, osmium, and lead in a metal-poor halo star: HD 126238,” Astrophys. J. 460, L115–L118 (1996).

M. Kock, “Atomic oscillator strengths from emission measurements: achievements and limitations,” Phys. Scr. T65, 43–47 (1996).
[CrossRef]

1995

A. W. Weiss, “Multireferent superposition-of-configuration calculations of core-correlation effects on energy levels and oscillator strengths: Be and B+,” Phys. Rev. A 51, 1067–1079 (1995).
[CrossRef] [PubMed]

D. E. Nitz, S. D. Bergeson, and J. E. Lawler, “Radiative lifetimes in Co I,” J. Opt. Soc. Am. B 12, 377–383 (1995).
[CrossRef]

1992

B. Guo, W. Ansbacher, E. H. Pinnington, Q. Ji, and R. W. Berends, “Beam-laser lifetime measurements for low-lying quartet states in Fe II,” Phys. Rev. A 46, 641–644 (1992).
[CrossRef] [PubMed]

1991

E. Biémont, M. Baudoux, R. L. Kurucz, W. Ansbacher, and E. H. Pinnington, “The solar abundance of iron: a final word!” Astron. Astrophys. 249, 539–544 (1991).

T. R. O’Brian, M. E. Wickliffe, J. E. Lawler, W. Whaling, and J. W. Brault, “Lifetimes, transition probabilities, and level energies in Fe I,” J. Opt. Soc. Am. B 8, 1185–1201 (1991).
[CrossRef]

1990

T. Worm, P. Shi, and O. Poulsen, “Lifetimes and hyperfine structures in Ho II,” Phys. Scr. 42, 569–573 (1990).
[CrossRef]

1989

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

1988

1984

A. Kono and S. Hattori, “Accurate oscillator strengths for neutral helium,” Phys. Rev. A 29, 2981–2988 (1984).
[CrossRef]

D. E. Blackwell, S. L. R. Menon, and A. D. Petford, “Measurement of relative oscillator strengths for Cr I lines. I. Measures for transitions from levels a7S3 (0.00 eV), a5S2(0.94 eV) and a5D0−4 (0.96–1.03 eV),” Mon. Not. R. Astron. Soc. 207, 533–546 (1984).

C. R. Cowley, “Lanthanide rare earths in stellar spectra with emphasis on chemically peculiar stars,” Phys. Scr. T8, 28–38 (1984).
[CrossRef]

1979

V. N. Gorshkov and V. A. Komarovskii, “Lifetimes of excited levels and oscillator strengths of Ho I and Ho II spectral lines,” Opt. Spectrosc. (USSR) 47, 350–351 (1979).

1978

W. C. Martin, R. Zalubas, and L. Hagan, “Atomic energy levels—the rare-earth elements,” Natl. Stand. Ref. Data Ser. (U.S., Natl. Bur. Stand.) 60, 305–307 (1978).

1977

J.-F. Wyart, P. Camus, and J. Vergès, “Etude du Spectre de l’Holmium Atomique: I. Spectre d’Emission Infrarouge Niveaux d’Energie de Ho I et Structures Hyperfine,” Physica 92C, 377–396 (1977).

1976

J. M. Harris, F. E. Lytle, and T. C. McCain, “Squirrel-cage photomultiplier base for measurement of nanosecond fluorescence decays,” Anal. Chem. 48, 2095–2098 (1976).
[CrossRef]

Anderson, H. M.

Ansbacher, W.

B. Guo, W. Ansbacher, E. H. Pinnington, Q. Ji, and R. W. Berends, “Beam-laser lifetime measurements for low-lying quartet states in Fe II,” Phys. Rev. A 46, 641–644 (1992).
[CrossRef] [PubMed]

E. Biémont, M. Baudoux, R. L. Kurucz, W. Ansbacher, and E. H. Pinnington, “The solar abundance of iron: a final word!” Astron. Astrophys. 249, 539–544 (1991).

Armosky, B. J.

C. Sneden, A. McWilliam, G. W. Preston, J. J. Cowan, D. L. Burris, and B. J. Armosky, “The ultra-metal-poor, neutron-capture-rich giant star CS 22892–052,” Astrophys. J. 467, 819–840 (1996).
[CrossRef]

Baudoux, M.

E. Biémont, M. Baudoux, R. L. Kurucz, W. Ansbacher, and E. H. Pinnington, “The solar abundance of iron: a final word!” Astron. Astrophys. 249, 539–544 (1991).

Berends, R. W.

B. Guo, W. Ansbacher, E. H. Pinnington, Q. Ji, and R. W. Berends, “Beam-laser lifetime measurements for low-lying quartet states in Fe II,” Phys. Rev. A 46, 641–644 (1992).
[CrossRef] [PubMed]

Bergeson, S. D.

Biémont, E.

E. Biémont, M. Baudoux, R. L. Kurucz, W. Ansbacher, and E. H. Pinnington, “The solar abundance of iron: a final word!” Astron. Astrophys. 249, 539–544 (1991).

Blackwell, D. E.

D. E. Blackwell, S. L. R. Menon, and A. D. Petford, “Measurement of relative oscillator strengths for Cr I lines. I. Measures for transitions from levels a7S3 (0.00 eV), a5S2(0.94 eV) and a5D0−4 (0.96–1.03 eV),” Mon. Not. R. Astron. Soc. 207, 533–546 (1984).

Brault, J. W.

Burris, D. L.

C. Sneden, A. McWilliam, G. W. Preston, J. J. Cowan, D. L. Burris, and B. J. Armosky, “The ultra-metal-poor, neutron-capture-rich giant star CS 22892–052,” Astrophys. J. 467, 819–840 (1996).
[CrossRef]

J. J. Cowan, C. Sneden, J. W. Truran, and D. L. Burris, “First detection of platinum, osmium, and lead in a metal-poor halo star: HD 126238,” Astrophys. J. 460, L115–L118 (1996).

Camus, P.

J.-F. Wyart, P. Camus, and J. Vergès, “Etude du Spectre de l’Holmium Atomique: I. Spectre d’Emission Infrarouge Niveaux d’Energie de Ho I et Structures Hyperfine,” Physica 92C, 377–396 (1977).

Carlsson, J.

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

Cowan, J. J.

C. Sneden, A. McWilliam, G. W. Preston, J. J. Cowan, D. L. Burris, and B. J. Armosky, “The ultra-metal-poor, neutron-capture-rich giant star CS 22892–052,” Astrophys. J. 467, 819–840 (1996).
[CrossRef]

J. J. Cowan, C. Sneden, J. W. Truran, and D. L. Burris, “First detection of platinum, osmium, and lead in a metal-poor halo star: HD 126238,” Astrophys. J. 460, L115–L118 (1996).

Cowley, C. R.

C. R. Cowley, “Lanthanide rare earths in stellar spectra with emphasis on chemically peculiar stars,” Phys. Scr. T8, 28–38 (1984).
[CrossRef]

Curry, J. J.

Dakin, J. T.

Den Hartog, E. A.

Gorshkov, V. N.

V. N. Gorshkov and V. A. Komarovskii, “Lifetimes of excited levels and oscillator strengths of Ho I and Ho II spectral lines,” Opt. Spectrosc. (USSR) 47, 350–351 (1979).

Guo, B.

B. Guo, W. Ansbacher, E. H. Pinnington, Q. Ji, and R. W. Berends, “Beam-laser lifetime measurements for low-lying quartet states in Fe II,” Phys. Rev. A 46, 641–644 (1992).
[CrossRef] [PubMed]

Hagan, L.

W. C. Martin, R. Zalubas, and L. Hagan, “Atomic energy levels—the rare-earth elements,” Natl. Stand. Ref. Data Ser. (U.S., Natl. Bur. Stand.) 60, 305–307 (1978).

Harris, J. M.

J. M. Harris, F. E. Lytle, and T. C. McCain, “Squirrel-cage photomultiplier base for measurement of nanosecond fluorescence decays,” Anal. Chem. 48, 2095–2098 (1976).
[CrossRef]

Hattori, S.

A. Kono and S. Hattori, “Accurate oscillator strengths for neutral helium,” Phys. Rev. A 29, 2981–2988 (1984).
[CrossRef]

Ji, Q.

B. Guo, W. Ansbacher, E. H. Pinnington, Q. Ji, and R. W. Berends, “Beam-laser lifetime measurements for low-lying quartet states in Fe II,” Phys. Rev. A 46, 641–644 (1992).
[CrossRef] [PubMed]

Kock, M.

M. Kock, “Atomic oscillator strengths from emission measurements: achievements and limitations,” Phys. Scr. T65, 43–47 (1996).
[CrossRef]

Komarovskii, V. A.

V. N. Gorshkov and V. A. Komarovskii, “Lifetimes of excited levels and oscillator strengths of Ho I and Ho II spectral lines,” Opt. Spectrosc. (USSR) 47, 350–351 (1979).

Kono, A.

A. Kono and S. Hattori, “Accurate oscillator strengths for neutral helium,” Phys. Rev. A 29, 2981–2988 (1984).
[CrossRef]

Kröger, S.

S. Kröger, J.-F. Wyart, and P. Luc, “Theoretical interpretation of hyperfine structures in doubly-excited configurations 4f105d6s6p and 4f105d26s and new energy levels in neutral holmium (Ho I),” Phys. Scr. 55, 579–585 (1997).
[CrossRef]

Kurucz, R. L.

E. Biémont, M. Baudoux, R. L. Kurucz, W. Ansbacher, and E. H. Pinnington, “The solar abundance of iron: a final word!” Astron. Astrophys. 249, 539–544 (1991).

Lawler, J. E.

Luc, P.

S. Kröger, J.-F. Wyart, and P. Luc, “Theoretical interpretation of hyperfine structures in doubly-excited configurations 4f105d6s6p and 4f105d26s and new energy levels in neutral holmium (Ho I),” Phys. Scr. 55, 579–585 (1997).
[CrossRef]

Lytle, F. E.

J. M. Harris, F. E. Lytle, and T. C. McCain, “Squirrel-cage photomultiplier base for measurement of nanosecond fluorescence decays,” Anal. Chem. 48, 2095–2098 (1976).
[CrossRef]

Marsden, G. C.

Martin, W. C.

W. C. Martin, R. Zalubas, and L. Hagan, “Atomic energy levels—the rare-earth elements,” Natl. Stand. Ref. Data Ser. (U.S., Natl. Bur. Stand.) 60, 305–307 (1978).

McCain, T. C.

J. M. Harris, F. E. Lytle, and T. C. McCain, “Squirrel-cage photomultiplier base for measurement of nanosecond fluorescence decays,” Anal. Chem. 48, 2095–2098 (1976).
[CrossRef]

McWilliam, A.

C. Sneden, A. McWilliam, G. W. Preston, J. J. Cowan, D. L. Burris, and B. J. Armosky, “The ultra-metal-poor, neutron-capture-rich giant star CS 22892–052,” Astrophys. J. 467, 819–840 (1996).
[CrossRef]

Menon, S. L. R.

D. E. Blackwell, S. L. R. Menon, and A. D. Petford, “Measurement of relative oscillator strengths for Cr I lines. I. Measures for transitions from levels a7S3 (0.00 eV), a5S2(0.94 eV) and a5D0−4 (0.96–1.03 eV),” Mon. Not. R. Astron. Soc. 207, 533–546 (1984).

Nitz, D. E.

O’Brian, T. R.

Petford, A. D.

D. E. Blackwell, S. L. R. Menon, and A. D. Petford, “Measurement of relative oscillator strengths for Cr I lines. I. Measures for transitions from levels a7S3 (0.00 eV), a5S2(0.94 eV) and a5D0−4 (0.96–1.03 eV),” Mon. Not. R. Astron. Soc. 207, 533–546 (1984).

Pinnington, E. H.

B. Guo, W. Ansbacher, E. H. Pinnington, Q. Ji, and R. W. Berends, “Beam-laser lifetime measurements for low-lying quartet states in Fe II,” Phys. Rev. A 46, 641–644 (1992).
[CrossRef] [PubMed]

E. Biémont, M. Baudoux, R. L. Kurucz, W. Ansbacher, and E. H. Pinnington, “The solar abundance of iron: a final word!” Astron. Astrophys. 249, 539–544 (1991).

Poulsen, O.

T. Worm, P. Shi, and O. Poulsen, “Lifetimes and hyperfine structures in Ho II,” Phys. Scr. 42, 569–573 (1990).
[CrossRef]

Preston, G. W.

C. Sneden, A. McWilliam, G. W. Preston, J. J. Cowan, D. L. Burris, and B. J. Armosky, “The ultra-metal-poor, neutron-capture-rich giant star CS 22892–052,” Astrophys. J. 467, 819–840 (1996).
[CrossRef]

Roberts, V. D.

Shi, P.

T. Worm, P. Shi, and O. Poulsen, “Lifetimes and hyperfine structures in Ho II,” Phys. Scr. 42, 569–573 (1990).
[CrossRef]

Sneden, C.

J. J. Cowan, C. Sneden, J. W. Truran, and D. L. Burris, “First detection of platinum, osmium, and lead in a metal-poor halo star: HD 126238,” Astrophys. J. 460, L115–L118 (1996).

C. Sneden, A. McWilliam, G. W. Preston, J. J. Cowan, D. L. Burris, and B. J. Armosky, “The ultra-metal-poor, neutron-capture-rich giant star CS 22892–052,” Astrophys. J. 467, 819–840 (1996).
[CrossRef]

Sturesson, L.

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

Svanberg, S.

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

Truran, J. W.

J. J. Cowan, C. Sneden, J. W. Truran, and D. L. Burris, “First detection of platinum, osmium, and lead in a metal-poor halo star: HD 126238,” Astrophys. J. 460, L115–L118 (1996).

Vergès, J.

J.-F. Wyart, P. Camus, and J. Vergès, “Etude du Spectre de l’Holmium Atomique: I. Spectre d’Emission Infrarouge Niveaux d’Energie de Ho I et Structures Hyperfine,” Physica 92C, 377–396 (1977).

Weiss, A. W.

A. W. Weiss, “Multireferent superposition-of-configuration calculations of core-correlation effects on energy levels and oscillator strengths: Be and B+,” Phys. Rev. A 51, 1067–1079 (1995).
[CrossRef] [PubMed]

Whaling, W.

Wickliffe, M. E.

Worm, T.

T. Worm, P. Shi, and O. Poulsen, “Lifetimes and hyperfine structures in Ho II,” Phys. Scr. 42, 569–573 (1990).
[CrossRef]

Wyart, J.-F.

S. Kröger, J.-F. Wyart, and P. Luc, “Theoretical interpretation of hyperfine structures in doubly-excited configurations 4f105d6s6p and 4f105d26s and new energy levels in neutral holmium (Ho I),” Phys. Scr. 55, 579–585 (1997).
[CrossRef]

J.-F. Wyart, P. Camus, and J. Vergès, “Etude du Spectre de l’Holmium Atomique: I. Spectre d’Emission Infrarouge Niveaux d’Energie de Ho I et Structures Hyperfine,” Physica 92C, 377–396 (1977).

Zalubas, R.

W. C. Martin, R. Zalubas, and L. Hagan, “Atomic energy levels—the rare-earth elements,” Natl. Stand. Ref. Data Ser. (U.S., Natl. Bur. Stand.) 60, 305–307 (1978).

Anal. Chem.

J. M. Harris, F. E. Lytle, and T. C. McCain, “Squirrel-cage photomultiplier base for measurement of nanosecond fluorescence decays,” Anal. Chem. 48, 2095–2098 (1976).
[CrossRef]

Astron. Astrophys.

E. Biémont, M. Baudoux, R. L. Kurucz, W. Ansbacher, and E. H. Pinnington, “The solar abundance of iron: a final word!” Astron. Astrophys. 249, 539–544 (1991).

Astrophys. J.

C. Sneden, A. McWilliam, G. W. Preston, J. J. Cowan, D. L. Burris, and B. J. Armosky, “The ultra-metal-poor, neutron-capture-rich giant star CS 22892–052,” Astrophys. J. 467, 819–840 (1996).
[CrossRef]

J. J. Cowan, C. Sneden, J. W. Truran, and D. L. Burris, “First detection of platinum, osmium, and lead in a metal-poor halo star: HD 126238,” Astrophys. J. 460, L115–L118 (1996).

J. Opt. Soc. Am. B

Mon. Not. R. Astron. Soc.

D. E. Blackwell, S. L. R. Menon, and A. D. Petford, “Measurement of relative oscillator strengths for Cr I lines. I. Measures for transitions from levels a7S3 (0.00 eV), a5S2(0.94 eV) and a5D0−4 (0.96–1.03 eV),” Mon. Not. R. Astron. Soc. 207, 533–546 (1984).

Natl. Stand. Ref. Data Ser. (U.S., Natl. Bur. Stand.)

W. C. Martin, R. Zalubas, and L. Hagan, “Atomic energy levels—the rare-earth elements,” Natl. Stand. Ref. Data Ser. (U.S., Natl. Bur. Stand.) 60, 305–307 (1978).

Opt. Spectrosc. (USSR)

V. N. Gorshkov and V. A. Komarovskii, “Lifetimes of excited levels and oscillator strengths of Ho I and Ho II spectral lines,” Opt. Spectrosc. (USSR) 47, 350–351 (1979).

Phys. Rev. A

A. Kono and S. Hattori, “Accurate oscillator strengths for neutral helium,” Phys. Rev. A 29, 2981–2988 (1984).
[CrossRef]

A. W. Weiss, “Multireferent superposition-of-configuration calculations of core-correlation effects on energy levels and oscillator strengths: Be and B+,” Phys. Rev. A 51, 1067–1079 (1995).
[CrossRef] [PubMed]

B. Guo, W. Ansbacher, E. H. Pinnington, Q. Ji, and R. W. Berends, “Beam-laser lifetime measurements for low-lying quartet states in Fe II,” Phys. Rev. A 46, 641–644 (1992).
[CrossRef] [PubMed]

Phys. Scr.

M. Kock, “Atomic oscillator strengths from emission measurements: achievements and limitations,” Phys. Scr. T65, 43–47 (1996).
[CrossRef]

C. R. Cowley, “Lanthanide rare earths in stellar spectra with emphasis on chemically peculiar stars,” Phys. Scr. T8, 28–38 (1984).
[CrossRef]

T. Worm, P. Shi, and O. Poulsen, “Lifetimes and hyperfine structures in Ho II,” Phys. Scr. 42, 569–573 (1990).
[CrossRef]

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Tables (3)

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Table 1 Lifetimes of Odd-Parity Levels in Ho i

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Table 2 Lifetimes of Even-Parity Levels in Ho i

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Table 3 Lifetimes of Even-Parity Levels in Ho ii

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