Abstract

A technique for precisely measuring hyperfine structure of any level of neutral uranium which can be excited by a single or multistep transition from the ground or a low-lying-metastable state has been developed. Numerous spectra were measured and fit to obtain precise hyperfine splitting constants. In particular, measurements on the 31 869-cm−1 odd level have determined the following: J = 6, magnetic dipole constant A = −47.2 ± 0.6 MHz and electric quadrupole constant B = 1892 ± 26 MHz. Structure of serveral excited states of known configuration were measured including the 15 632-cm−1 f2d 2s 2(5L7) and the 16 930-cm−1 f3dsp (7K5) levels.

© 1979 Optical Society of America

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References

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  1. S. Gerstenkorn, P. Luc, U. Bauche-Arnoult, and D. Merle, “Structure Hyperfine du Niveau Fondamental, Moments Dipolarire et Quadrupolaire de l’Isotope 235 de l’Uranium,” J. Phys. 34, 805–812, (1973).
    [Crossref]
  2. H.-D. V. Bohm, “Isotopentrennung von 235U and 238U im Atomstrahl mit selektiver zweistufiger Photoionisation,”. Vbm Fachbereich Physik der Universitat Hamburg als Dissertation angenommene Arbeit. Gesellschaft fur Kernenergieverwertuhg in Schiffbau und Schiffahrt mbH. Geestacht (1977).(“Isotope Separation of 235U and 238U in an Atomic Beam with Selective Two-Step Photoionization,” only available English translation at Lawrence Livermore Laboratory, P.O. Box 808, Livermore, California 94550.UCRL-TRANS-11327.)
  3. G. Janes, H. K. Forsen, and R. H. Levy, Symposium Series of the American Institute of Chem. Engr. Series No. 169, Vol. 73, 1977, edited by Manson Benedict (Am. Inst. Chem. Eng., New York, 1977) p 62.
  4. I. I. Sobelḿan, Introduction to the Theory of Atomic Spectra, (Pergamon, New York, 1972).
  5. J. Blaise and L. J. Radziemski, “Energy Levels of Neutral Atomic Uranium (U I),” J. Opt. Soc. Am. 66, 644 (1976).
    [Crossref]

1976 (1)

1973 (1)

S. Gerstenkorn, P. Luc, U. Bauche-Arnoult, and D. Merle, “Structure Hyperfine du Niveau Fondamental, Moments Dipolarire et Quadrupolaire de l’Isotope 235 de l’Uranium,” J. Phys. 34, 805–812, (1973).
[Crossref]

Bauche-Arnoult, U.

S. Gerstenkorn, P. Luc, U. Bauche-Arnoult, and D. Merle, “Structure Hyperfine du Niveau Fondamental, Moments Dipolarire et Quadrupolaire de l’Isotope 235 de l’Uranium,” J. Phys. 34, 805–812, (1973).
[Crossref]

Blaise, J.

Bohm, H.-D. V.

H.-D. V. Bohm, “Isotopentrennung von 235U and 238U im Atomstrahl mit selektiver zweistufiger Photoionisation,”. Vbm Fachbereich Physik der Universitat Hamburg als Dissertation angenommene Arbeit. Gesellschaft fur Kernenergieverwertuhg in Schiffbau und Schiffahrt mbH. Geestacht (1977).(“Isotope Separation of 235U and 238U in an Atomic Beam with Selective Two-Step Photoionization,” only available English translation at Lawrence Livermore Laboratory, P.O. Box 808, Livermore, California 94550.UCRL-TRANS-11327.)

Forsen, H. K.

G. Janes, H. K. Forsen, and R. H. Levy, Symposium Series of the American Institute of Chem. Engr. Series No. 169, Vol. 73, 1977, edited by Manson Benedict (Am. Inst. Chem. Eng., New York, 1977) p 62.

Gerstenkorn, S.

S. Gerstenkorn, P. Luc, U. Bauche-Arnoult, and D. Merle, “Structure Hyperfine du Niveau Fondamental, Moments Dipolarire et Quadrupolaire de l’Isotope 235 de l’Uranium,” J. Phys. 34, 805–812, (1973).
[Crossref]

Janes, G.

G. Janes, H. K. Forsen, and R. H. Levy, Symposium Series of the American Institute of Chem. Engr. Series No. 169, Vol. 73, 1977, edited by Manson Benedict (Am. Inst. Chem. Eng., New York, 1977) p 62.

Levy, R. H.

G. Janes, H. K. Forsen, and R. H. Levy, Symposium Series of the American Institute of Chem. Engr. Series No. 169, Vol. 73, 1977, edited by Manson Benedict (Am. Inst. Chem. Eng., New York, 1977) p 62.

Luc, P.

S. Gerstenkorn, P. Luc, U. Bauche-Arnoult, and D. Merle, “Structure Hyperfine du Niveau Fondamental, Moments Dipolarire et Quadrupolaire de l’Isotope 235 de l’Uranium,” J. Phys. 34, 805–812, (1973).
[Crossref]

Merle, D.

S. Gerstenkorn, P. Luc, U. Bauche-Arnoult, and D. Merle, “Structure Hyperfine du Niveau Fondamental, Moments Dipolarire et Quadrupolaire de l’Isotope 235 de l’Uranium,” J. Phys. 34, 805–812, (1973).
[Crossref]

Radziemski, L. J.

Sobel?an, I. I.

I. I. Sobelḿan, Introduction to the Theory of Atomic Spectra, (Pergamon, New York, 1972).

J. Opt. Soc. Am. (1)

J. Phys. (1)

S. Gerstenkorn, P. Luc, U. Bauche-Arnoult, and D. Merle, “Structure Hyperfine du Niveau Fondamental, Moments Dipolarire et Quadrupolaire de l’Isotope 235 de l’Uranium,” J. Phys. 34, 805–812, (1973).
[Crossref]

Other (3)

H.-D. V. Bohm, “Isotopentrennung von 235U and 238U im Atomstrahl mit selektiver zweistufiger Photoionisation,”. Vbm Fachbereich Physik der Universitat Hamburg als Dissertation angenommene Arbeit. Gesellschaft fur Kernenergieverwertuhg in Schiffbau und Schiffahrt mbH. Geestacht (1977).(“Isotope Separation of 235U and 238U in an Atomic Beam with Selective Two-Step Photoionization,” only available English translation at Lawrence Livermore Laboratory, P.O. Box 808, Livermore, California 94550.UCRL-TRANS-11327.)

G. Janes, H. K. Forsen, and R. H. Levy, Symposium Series of the American Institute of Chem. Engr. Series No. 169, Vol. 73, 1977, edited by Manson Benedict (Am. Inst. Chem. Eng., New York, 1977) p 62.

I. I. Sobelḿan, Introduction to the Theory of Atomic Spectra, (Pergamon, New York, 1972).

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Figures (3)

FIG. 1
FIG. 1

Experimental setup for accurately measuring U I hyperfine structure.

FIG. 2
FIG. 2

Hyperfine structure of the 6395-Å (0–15 632 cm−1) J = 6 to J = 7 transition in U-235. Zero of frequency scale is arbitrary.

FIG. 3
FIG. 3

Hyperfine structure of a high-lying level of U-235. The components are from the 6156.8-Å transition between the 15 632- and 31 869-cm−1 levels. Zero of frequency scale is arbitrary.

Tables (2)

Tables Icon

TABLE I Hyperfine structure of the 6395-Å (0 to 15 632 cm−1) transition (J = 6 → J = 7) of U I.

Tables Icon

TABLE II U-235 hyperfine structure coupling constants obtained from linear least squares fitting the measured component positions. Uncertainties in the constants are one σ. (B) = work of Bohm.2 (G) = work of Gerstenkorn et al.1