Fine and hyperfine structure of the 3P2 term in lithium

B. Budick, H. Bucka, R. J. Goshen, A. Landman, R. Novick

    Research output: Contribution to journalArticle

    Abstract

    The fine and hyperfine structures of the 3p2 term in Li7 have been studied by the technique of level-crossing spectroscopy. A preliminary value for the fine-structure separation is Δν=2882.9±1.2 Mc/sec. It is expected that the present technique can be extended to obtain a result that is reliable to a few parts per million. It is noteworthy that the fine-structure intervals in lithium are 8% and 12% smaller for the 2p and 3p levels, respectively, than the corresponding intervals in hydrogen. A theory is developed for interpreting the separation between hyperfine level crossings. Its application depends on a detailed knowledge of the core-polarization effects of the 3p electron. Evidence is presented indicating that the core-polarization effects in the np states n=2,3 scale as 1r3np for the valence electron. Assuming this to be true, we estimate that ae(3p)=-3.05(12) Mc/sec for Li7. The limited precision achieved so far in this work has prevented observation of the Li7 quadrupole interaction.

    Original languageEnglish (US)
    Pages (from-to)1-5
    Number of pages5
    JournalPhysical Review
    Volume147
    Issue number1
    DOIs
    StatePublished - 1966

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    hyperfine structure
    lithium
    fine structure
    intervals
    polarization
    electrons
    quadrupoles
    valence
    hydrogen
    estimates
    spectroscopy
    interactions

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Budick, B., Bucka, H., Goshen, R. J., Landman, A., & Novick, R. (1966). Fine and hyperfine structure of the 3P2 term in lithium. Physical Review, 147(1), 1-5. https://doi.org/10.1103/PhysRev.147.1

    Fine and hyperfine structure of the 3P2 term in lithium. / Budick, B.; Bucka, H.; Goshen, R. J.; Landman, A.; Novick, R.

    In: Physical Review, Vol. 147, No. 1, 1966, p. 1-5.

    Research output: Contribution to journalArticle

    Budick, B, Bucka, H, Goshen, RJ, Landman, A & Novick, R 1966, 'Fine and hyperfine structure of the 3P2 term in lithium', Physical Review, vol. 147, no. 1, pp. 1-5. https://doi.org/10.1103/PhysRev.147.1
    Budick B, Bucka H, Goshen RJ, Landman A, Novick R. Fine and hyperfine structure of the 3P2 term in lithium. Physical Review. 1966;147(1):1-5. https://doi.org/10.1103/PhysRev.147.1
    Budick, B. ; Bucka, H. ; Goshen, R. J. ; Landman, A. ; Novick, R. / Fine and hyperfine structure of the 3P2 term in lithium. In: Physical Review. 1966 ; Vol. 147, No. 1. pp. 1-5.
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    abstract = "The fine and hyperfine structures of the 3p2 term in Li7 have been studied by the technique of level-crossing spectroscopy. A preliminary value for the fine-structure separation is Δν=2882.9±1.2 Mc/sec. It is expected that the present technique can be extended to obtain a result that is reliable to a few parts per million. It is noteworthy that the fine-structure intervals in lithium are 8{\%} and 12{\%} smaller for the 2p and 3p levels, respectively, than the corresponding intervals in hydrogen. A theory is developed for interpreting the separation between hyperfine level crossings. Its application depends on a detailed knowledge of the core-polarization effects of the 3p electron. Evidence is presented indicating that the core-polarization effects in the np states n=2,3 scale as 1r3np for the valence electron. Assuming this to be true, we estimate that ae(3p)=-3.05(12) Mc/sec for Li7. The limited precision achieved so far in this work has prevented observation of the Li7 quadrupole interaction.",
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