Abstract

Systematic mapping of high-lying even-parity levels (low-lying configurations) of the samarium atom below the first ionization potential was carried out with a two-step photoexcitation and photoionization method. Five hundred seventy-one new energy levels were discovered in the region 34 85045 300 cm-1, and an unambiguous assignment of angular momenta was given to most of the energy levels in accordance with the electric dipole selection rules.

© 2000 Optical Society of America

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References

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  1. W. Albertson, “The arc spectrum of samarium and gadolinium normal configuration of the rare earths,” Phys. Rev. 47, 370–376 (1935).
    [CrossRef]
  2. A. Carlier, J. Blaise, and M. G. Schweighofer, “Etude des configurations impaires 4f66s6p et 4f55d6s2 de Sm I,” J. Phys. (France) 29, 729–738 (1968).
    [CrossRef]
  3. J. Blaise, C. Morillon, M. G. Schweighofer, and J. Verges, “Study of infrared emission spectra using a SISAM spectrometer. III. Emission spectrum of samarium,” Spectrochim. Acta B 24, 405–445 (1969).
    [CrossRef]
  4. G. Racah and U. Ganiel, “Sub-configuration f 6(7F)sp in Sm I,” J. Opt. Soc. Am. 56, 893–895 (1966).
    [CrossRef]
  5. W. C. Martin, R. Zalubas, and L. Hagan, “Atomic energy levels—the rare earth elements,” Natl. Bur. Stand. (U.S) Circ. 60, (1978).
  6. L. Jia, C. Jing, Z. Zhou, and F. Lin, “Studies of high lying even parity levels of Sm I: energies and isotope shifts,” J. Opt. Soc. Am. B 10, 1317–1320 (1993).
    [CrossRef]
  7. T. Jayasekharan, M. A. N. Razvi, and G. L. Bhale, “Observation of new even-parity states of Sm I by resonance ionization mass spectrometry,” J. Opt. Soc. Am. B 13, 641–648 (1996).
    [CrossRef]
  8. B. A. Palmer, R. A. Keller, and R. Engleman, Jr., An Atlas of Uranium Emission Intensities in a Hollow Cathode Discharge, Rep. UC-34A (Los Alamos National Laboratory, Los Almos, N. M. 87545, 1980).
  9. P. Quittner, Gamma-Ray Spectroscopy with Particular Reference to Detector and Computer Evaluation Techniques (Adam Hilger, London, 1972).
  10. I. I Sobelman, Atomic Spectra and Radiative Transitions (Springer-Verlag, Berlin, 1979).
  11. K. D. Bonin and T. J. McIlrath, “Two-photon electric-dipole selection rules,” J. Opt. Soc. Am. B 1, 52–55 (1984).
    [CrossRef]
  12. H. M. Crosswhite, in Gmelin Handbook of Inorganic Chemistry, 8th ed., Uranium, Supplement Vol. A5, Spectra, K.-C. Buschbeck, ed. (Springer-Verlag, Berlin, 1982), pp. 1–68.

1996 (1)

1993 (1)

1984 (1)

1969 (1)

J. Blaise, C. Morillon, M. G. Schweighofer, and J. Verges, “Study of infrared emission spectra using a SISAM spectrometer. III. Emission spectrum of samarium,” Spectrochim. Acta B 24, 405–445 (1969).
[CrossRef]

1968 (1)

A. Carlier, J. Blaise, and M. G. Schweighofer, “Etude des configurations impaires 4f66s6p et 4f55d6s2 de Sm I,” J. Phys. (France) 29, 729–738 (1968).
[CrossRef]

1966 (1)

1935 (1)

W. Albertson, “The arc spectrum of samarium and gadolinium normal configuration of the rare earths,” Phys. Rev. 47, 370–376 (1935).
[CrossRef]

Albertson, W.

W. Albertson, “The arc spectrum of samarium and gadolinium normal configuration of the rare earths,” Phys. Rev. 47, 370–376 (1935).
[CrossRef]

Bhale, G. L.

Blaise, J.

J. Blaise, C. Morillon, M. G. Schweighofer, and J. Verges, “Study of infrared emission spectra using a SISAM spectrometer. III. Emission spectrum of samarium,” Spectrochim. Acta B 24, 405–445 (1969).
[CrossRef]

A. Carlier, J. Blaise, and M. G. Schweighofer, “Etude des configurations impaires 4f66s6p et 4f55d6s2 de Sm I,” J. Phys. (France) 29, 729–738 (1968).
[CrossRef]

Bonin, K. D.

Carlier, A.

A. Carlier, J. Blaise, and M. G. Schweighofer, “Etude des configurations impaires 4f66s6p et 4f55d6s2 de Sm I,” J. Phys. (France) 29, 729–738 (1968).
[CrossRef]

Ganiel, U.

Jayasekharan, T.

Jia, L.

Jing, C.

Lin, F.

McIlrath, T. J.

Morillon, C.

J. Blaise, C. Morillon, M. G. Schweighofer, and J. Verges, “Study of infrared emission spectra using a SISAM spectrometer. III. Emission spectrum of samarium,” Spectrochim. Acta B 24, 405–445 (1969).
[CrossRef]

Racah, G.

Razvi, M. A. N.

Schweighofer, M. G.

J. Blaise, C. Morillon, M. G. Schweighofer, and J. Verges, “Study of infrared emission spectra using a SISAM spectrometer. III. Emission spectrum of samarium,” Spectrochim. Acta B 24, 405–445 (1969).
[CrossRef]

A. Carlier, J. Blaise, and M. G. Schweighofer, “Etude des configurations impaires 4f66s6p et 4f55d6s2 de Sm I,” J. Phys. (France) 29, 729–738 (1968).
[CrossRef]

Verges, J.

J. Blaise, C. Morillon, M. G. Schweighofer, and J. Verges, “Study of infrared emission spectra using a SISAM spectrometer. III. Emission spectrum of samarium,” Spectrochim. Acta B 24, 405–445 (1969).
[CrossRef]

Zhou, Z.

J. Opt. Soc. Am. (1)

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

J. Phys. (France) (1)

A. Carlier, J. Blaise, and M. G. Schweighofer, “Etude des configurations impaires 4f66s6p et 4f55d6s2 de Sm I,” J. Phys. (France) 29, 729–738 (1968).
[CrossRef]

Phys. Rev. (1)

W. Albertson, “The arc spectrum of samarium and gadolinium normal configuration of the rare earths,” Phys. Rev. 47, 370–376 (1935).
[CrossRef]

Spectrochim. Acta B (1)

J. Blaise, C. Morillon, M. G. Schweighofer, and J. Verges, “Study of infrared emission spectra using a SISAM spectrometer. III. Emission spectrum of samarium,” Spectrochim. Acta B 24, 405–445 (1969).
[CrossRef]

Other (5)

W. C. Martin, R. Zalubas, and L. Hagan, “Atomic energy levels—the rare earth elements,” Natl. Bur. Stand. (U.S) Circ. 60, (1978).

B. A. Palmer, R. A. Keller, and R. Engleman, Jr., An Atlas of Uranium Emission Intensities in a Hollow Cathode Discharge, Rep. UC-34A (Los Alamos National Laboratory, Los Almos, N. M. 87545, 1980).

P. Quittner, Gamma-Ray Spectroscopy with Particular Reference to Detector and Computer Evaluation Techniques (Adam Hilger, London, 1972).

I. I Sobelman, Atomic Spectra and Radiative Transitions (Springer-Verlag, Berlin, 1979).

H. M. Crosswhite, in Gmelin Handbook of Inorganic Chemistry, 8th ed., Uranium, Supplement Vol. A5, Spectra, K.-C. Buschbeck, ed. (Springer-Verlag, Berlin, 1982), pp. 1–68.

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Figures (3)

Fig. 1
Fig. 1

Schematic of the experimental setup.

Fig. 2
Fig. 2

Typical two-colorphotoionization spectra of Sm i for scheme IV along with reference optogalvanic (OG) spectra of uranium and Fabry–Perot etalon transmission fringes.

Fig. 3
Fig. 3

High-lying energy levels observed in two-color schemes I–IV. The assigned J values are given. Single-color resonances are marked with asterisks.

Tables (1)

Tables Icon

Table 1 New Even Parity Energy Levels and Their J Values

Equations (5)

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4 f   6 6 s 2 [ 7 F 1 ] { 292.58 cm - 1 } λ 1 4 f   6 6 s 6 p [ 7 F 0 o ] × { 17810.85   cm - 1   J = 0 } λ 2 E n [ J = 1 ] ,
4 f   6 6 s 2 [ 7 F 1 ] { 292.58 cm - 1 } λ 1 4 f   6 6 s 6 p × { 17769.71 cm - 1 J = 1 } λ 2 E n [ J = 0 ,   1 ,   2 ] ,
4 f   6 6 s 2 [ 7 F 1 ] { 292.58 cm - 1 } λ 1 4 f   6 6 s 6 p [ 7 F 2 o ] × { 17190.20 cm - 1 J = 2 } λ 2 E n [ J = 1   ,   2 , 3 ] ,
4 f   6 6 s 2 [ 7 F 2 ] { 811.92 cm - 1 } λ 1 4 f   6 6 s 6 p [ 7 F 3 o ] × { 17830.8   cm - 1 } λ 2 E n [ J =   2 ,   3 , 4 ] ,
Δ J = 0 , ± 1 .

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