Precision hfs of 126Cs(T1/2=1.63 m) by ABMR

J. Pinard, H. T. Duong, D. Marescaux, Henry H. Stroke, O. Redi, M. Gustafsson, T. Nilsson, S. Matsuki, Y. Kishimoto, K. Kominato, I. Ogawa, M. Shibata, M. Tada, J. R. Persson, Y. Nojiri, S. Momota, T. T. Inamura, M. Wakasugi, P. Juncar, T. MurayamaT. Nomura, M. Koizumi

    Research output: Contribution to journalArticlepeer-review


    The hfs separation Δν of 126Cs(T1/2 = 1.63 m) in the 6s2S1/2 ground state was obtained in a precision measurement near zero magnetic field by means of atomic beam magnetic resonance with laser optical pumping on-line with the CERN-PSB-ISOLDE mass separator. The result, Δν = 3629.514 (0.001) MHz, corrects significantly a previous published value from a high-field experiment. With our result, the precision of the nuclear magnetic moment, μ(126Cs) ≈ 0.776μN, is now limited by the influence of extended nuclear structure on the hfs (the Bohr-Weisskopf effect).

    Original languageEnglish (US)
    Pages (from-to)3-12
    Number of pages10
    JournalNuclear Physics A
    Issue number1-2
    StatePublished - May 2 2005


    • Atomic beam magnetic resonance
    • Bohr-Weisskopf effect
    • Nuclear momentsCs; measured hfs; deduced μ

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics


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