Messung der magnetischen Kerndipolmomente an freien43Ca-,87Sr-,135Ba-,137Ba-,171Yb- und173Yb-Atomen mit optischem Pumpen

As previously reported3,4 the optical pumping method was succesfully used to determine the nuclear magnetic moments of135Ba,137Ba,171Yb and173Yb. This method has now been extended to43Ca and87Sr. The nuclear moments of the Ba- and Yb-isotopes have been remeasured by means of an improved experimental technique. Especially the influence of the light shift has been investigated and the nuclear moments have been corrected by eliminating this shift. The magnetic field has been calibrated by means of optical pumping of23Na. The nuclear magnetic moments obtained from the rf-transitions between the Zeeman-levels of the ground state1 S o are: μ(43Ca)=−1.3172 (6)μ N ; μ87Sr)=−1.0924 (7) μ N ; μ(135Ba)=0.83656(2)μ N ; μ(137Ba)=0.93582(2)μ N ; μ(171Yb)=0.491889 (8)μ N ; μ(173Yb)=−0.67744 (3) μ N (diamagnetic correction was applied). The ratios of the nuclear moments of the elements with two odd isotopes are: μ(137Ba)/(135Ba)=1.11865 (3); μ(173Yb)/μ(171Yb)=−1.37723 (7). In comparison with the results of nuclear induction the chemical shifts have been calculated to be: δ(Ca)≦± 5 · 10−4 δ(Sr)=−6(7) ·10−4 δ(Ba)=−7.8(4) ·10−4 δ(Yb)=−23(10) · 10−4.