Abstract

Atomic isotope shifts in the spectra of dysprosium, erbium, and ytterbium have been measured using enriched samples and a Fabry-Perot interferometer. Results include new data on 5 lines in DyI, on 71 lines in ErI, and for 89 lines in YbI. Correlation of electron configurations indicates that for these elements ƒ<sup>n</sup>6<i>s</i>7<i>s</i>-ƒ<sup><i>n</i></sup>6<i>s</i>6<i>p</i> transitions show an average isotope shift of +28 mK, ƒ<sup><i>n</i>-1</sup>5<i>d</i>6<i>s</i>6<i>p</i>-ƒ<sup>n-1</sup>5d6s<sup>2</sup> exhibit shifts of -86 mK, ƒ<sup>n</sup>5d6s–ƒ<sup>n-1</sup>5<i>d</i>6<i>s</i><sup>2</sup> lines have shifts of - 105mK, ƒ<sup>n-1</sup>5<i>d</i><sup>2</sup>6<i>s</i>-ƒ<sup><i>n</i></sup>6<i>s</i><sup>2</sup> show shifts of -20 mk, while ƒ<sup>2</sup>6<i>s</i>6<i>d</i>-ƒ<sup><i>n</i></sup>6<i>s</i>6<i>p</i> and ƒ<sup>n-1</sup>6<i>p</i>6<i>s</i><sup>2</sup>-ƒ<sup>n-1</sup>5<i>d</i>6<i>s</i><sup>2</sup> transitions exhibit no detectable shifts. Using these isotope shift trends, 17 levels of YbI have been identified as belonging to 4ƒ<sup>13</sup>5d6s6p configurations.

© 1976 Optical Society of America

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  1. J. S. Ross, J. Opt. Soc. Am. 53, 299 (1963).
  2. Obtained from the Isotopes Development Center, Oak Ridge National Laboratory.
  3. J. S. Ross, J. Opt. Soc. Am. 62, 548 (1972).
  4. J. G. Conway and E. F. Worden, J. Opt. Soc. Am. 61, 704 (1971).
  5. D. C. Griffin, J. S. Ross, and R. D. Cowan, J. Opt. Soc. Am. 62, 571 (1972).
  6. J. F. Wyart, C. R. Acad. Sci. (Paris) Ser. B 273, 763 (1971).
  7. J. F. Wyart, Physica (Utrecht) 75, 371 (1974).
  8. L. C. Marquet, thesis, University of California, Berkeley, 1964 (University Microfilms No. 64-9053).
  9. W. E. Behring, Er I energy levels (private communication, 1973).
  10. Th. A. M. van Kleef and J. J. A. Koot, J. Opt. Soc. Am. 63, 1316 (1973).
  11. J. F. Wyart, J. J. A. Koot, and Th. A. M. van Kleef, Physica (Utrecht) 77, 159 (1974).
  12. Th. A. M. van Kleef, Er I energy levels and configurations (private communication, 1975).
  13. A. F. Golovin and A. R. Striganov, Opt. Spectrosk. 19, 467 (1965).
  14. W. F. Meggers and C. H. Corliss, J. Res. Nat. Bur. Stand. Sect. A 70, 63 (1966).
  15. W. F. Meggers, unpublished analysis of Yb I energy levels, edited and revised by J. L. Tech and C. E. Moore (private communication, 1974).
  16. P. Camus and F. S. Tomkins, Phys. (Paris) 30, 545 (1969).
  17. S. Nir, J. Opt. Soc. Am. 60, 354 (1970).
  18. N. Spector, J. Opt. Soc. Am. 61, 1350 (1971).
  19. J. H. Broadhurst, M. E. Cage, D. L. Clark, G. W. Greenlees, J. A. R. Griffith, and G. R. Isaak, J. Phys. B 7, L513 (1974).
  20. K. Krebs and H. Nelkowski, Z. Phys. 145, 543 (1956).
  21. Y. Chaiko, Opt. Spectrosk. 20, 424 (1966).
  22. After completion of this paper we have learned that these 4ƒ135d6s6p identifications agree completely with those made independently by Z. B. Goldschmidt utilizing parametric diagonalization of the energy matrices for several interacting configurations. J. L. Tech (private communication, 1975).

Behring, W. E.

W. E. Behring, Er I energy levels (private communication, 1973).

Broadhurst, J. H.

J. H. Broadhurst, M. E. Cage, D. L. Clark, G. W. Greenlees, J. A. R. Griffith, and G. R. Isaak, J. Phys. B 7, L513 (1974).

Cage, M. E.

J. H. Broadhurst, M. E. Cage, D. L. Clark, G. W. Greenlees, J. A. R. Griffith, and G. R. Isaak, J. Phys. B 7, L513 (1974).

Camus, P.

P. Camus and F. S. Tomkins, Phys. (Paris) 30, 545 (1969).

Chaiko, Y.

Y. Chaiko, Opt. Spectrosk. 20, 424 (1966).

Clark, D. L.

J. H. Broadhurst, M. E. Cage, D. L. Clark, G. W. Greenlees, J. A. R. Griffith, and G. R. Isaak, J. Phys. B 7, L513 (1974).

Conway, J. G.

J. G. Conway and E. F. Worden, J. Opt. Soc. Am. 61, 704 (1971).

Corliss, C. H.

W. F. Meggers and C. H. Corliss, J. Res. Nat. Bur. Stand. Sect. A 70, 63 (1966).

Cowan, R. D.

D. C. Griffin, J. S. Ross, and R. D. Cowan, J. Opt. Soc. Am. 62, 571 (1972).

Goldschmidt, Z. B.

After completion of this paper we have learned that these 4ƒ135d6s6p identifications agree completely with those made independently by Z. B. Goldschmidt utilizing parametric diagonalization of the energy matrices for several interacting configurations. J. L. Tech (private communication, 1975).

Golovin, A. F.

A. F. Golovin and A. R. Striganov, Opt. Spectrosk. 19, 467 (1965).

Greenlees, G. W.

J. H. Broadhurst, M. E. Cage, D. L. Clark, G. W. Greenlees, J. A. R. Griffith, and G. R. Isaak, J. Phys. B 7, L513 (1974).

Griffin, D. C.

D. C. Griffin, J. S. Ross, and R. D. Cowan, J. Opt. Soc. Am. 62, 571 (1972).

Griffith, J. A. R.

J. H. Broadhurst, M. E. Cage, D. L. Clark, G. W. Greenlees, J. A. R. Griffith, and G. R. Isaak, J. Phys. B 7, L513 (1974).

Isaak, G. R.

J. H. Broadhurst, M. E. Cage, D. L. Clark, G. W. Greenlees, J. A. R. Griffith, and G. R. Isaak, J. Phys. B 7, L513 (1974).

Koot, J. J. A.

J. F. Wyart, J. J. A. Koot, and Th. A. M. van Kleef, Physica (Utrecht) 77, 159 (1974).

Th. A. M. van Kleef and J. J. A. Koot, J. Opt. Soc. Am. 63, 1316 (1973).

Krebs, K.

K. Krebs and H. Nelkowski, Z. Phys. 145, 543 (1956).

Marquet, L. C.

L. C. Marquet, thesis, University of California, Berkeley, 1964 (University Microfilms No. 64-9053).

Meggers, W. F.

W. F. Meggers and C. H. Corliss, J. Res. Nat. Bur. Stand. Sect. A 70, 63 (1966).

W. F. Meggers, unpublished analysis of Yb I energy levels, edited and revised by J. L. Tech and C. E. Moore (private communication, 1974).

Nelkowski, H.

K. Krebs and H. Nelkowski, Z. Phys. 145, 543 (1956).

Nir, S.

S. Nir, J. Opt. Soc. Am. 60, 354 (1970).

Ross, J. S.

D. C. Griffin, J. S. Ross, and R. D. Cowan, J. Opt. Soc. Am. 62, 571 (1972).

J. S. Ross, J. Opt. Soc. Am. 53, 299 (1963).

J. S. Ross, J. Opt. Soc. Am. 62, 548 (1972).

Spector, N.

N. Spector, J. Opt. Soc. Am. 61, 1350 (1971).

Striganov, A. R.

A. F. Golovin and A. R. Striganov, Opt. Spectrosk. 19, 467 (1965).

Tomkins, F. S.

P. Camus and F. S. Tomkins, Phys. (Paris) 30, 545 (1969).

van Kleef, Th. A. M.

J. F. Wyart, J. J. A. Koot, and Th. A. M. van Kleef, Physica (Utrecht) 77, 159 (1974).

Th. A. M. van Kleef, Er I energy levels and configurations (private communication, 1975).

Th. A. M. van Kleef and J. J. A. Koot, J. Opt. Soc. Am. 63, 1316 (1973).

Worden, E. F.

J. G. Conway and E. F. Worden, J. Opt. Soc. Am. 61, 704 (1971).

Wyart, J. F.

J. F. Wyart, C. R. Acad. Sci. (Paris) Ser. B 273, 763 (1971).

J. F. Wyart, Physica (Utrecht) 75, 371 (1974).

J. F. Wyart, J. J. A. Koot, and Th. A. M. van Kleef, Physica (Utrecht) 77, 159 (1974).

Other (22)

J. S. Ross, J. Opt. Soc. Am. 53, 299 (1963).

Obtained from the Isotopes Development Center, Oak Ridge National Laboratory.

J. S. Ross, J. Opt. Soc. Am. 62, 548 (1972).

J. G. Conway and E. F. Worden, J. Opt. Soc. Am. 61, 704 (1971).

D. C. Griffin, J. S. Ross, and R. D. Cowan, J. Opt. Soc. Am. 62, 571 (1972).

J. F. Wyart, C. R. Acad. Sci. (Paris) Ser. B 273, 763 (1971).

J. F. Wyart, Physica (Utrecht) 75, 371 (1974).

L. C. Marquet, thesis, University of California, Berkeley, 1964 (University Microfilms No. 64-9053).

W. E. Behring, Er I energy levels (private communication, 1973).

Th. A. M. van Kleef and J. J. A. Koot, J. Opt. Soc. Am. 63, 1316 (1973).

J. F. Wyart, J. J. A. Koot, and Th. A. M. van Kleef, Physica (Utrecht) 77, 159 (1974).

Th. A. M. van Kleef, Er I energy levels and configurations (private communication, 1975).

A. F. Golovin and A. R. Striganov, Opt. Spectrosk. 19, 467 (1965).

W. F. Meggers and C. H. Corliss, J. Res. Nat. Bur. Stand. Sect. A 70, 63 (1966).

W. F. Meggers, unpublished analysis of Yb I energy levels, edited and revised by J. L. Tech and C. E. Moore (private communication, 1974).

P. Camus and F. S. Tomkins, Phys. (Paris) 30, 545 (1969).

S. Nir, J. Opt. Soc. Am. 60, 354 (1970).

N. Spector, J. Opt. Soc. Am. 61, 1350 (1971).

J. H. Broadhurst, M. E. Cage, D. L. Clark, G. W. Greenlees, J. A. R. Griffith, and G. R. Isaak, J. Phys. B 7, L513 (1974).

K. Krebs and H. Nelkowski, Z. Phys. 145, 543 (1956).

Y. Chaiko, Opt. Spectrosk. 20, 424 (1966).

After completion of this paper we have learned that these 4ƒ135d6s6p identifications agree completely with those made independently by Z. B. Goldschmidt utilizing parametric diagonalization of the energy matrices for several interacting configurations. J. L. Tech (private communication, 1975).

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