Präzisionsmessung der Kerndipolmomente von Ba135 und Ba137 mit optischem Pumpen

The nuclear Zeeman levels of the ground state of Barium (6s^{2 1}S₀, F=I=3/2) were polarized by means of optical pumping with the resonance line (6s^{2 1}S₀?6s 6p¹P₁, λ=5535 Å). The magnetic field was calibrated by means of optical pumping of sodium. The magnetic moments, calculated from the nuclear Hf-Zeeman-transitions at 228 Gauss are μ₁₃₅=0,83651 (6) μ_N μ₁₃₇=0,93573 (6) μ_N (with diamagnetic correction). With the results of nuclear induction in BaCl₂ we calculate the chemical shift to be (8.6±1.0)·10^?4. The ratio of the nuclear moments is μ₁₃₇/μ₁₃₅=1.11862 (3) in agreement with the measurements in BaCl₂.