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

As previously reported^3,4 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.