Messung der magnetischen Momente der tiefsten 2+-Zustände für einige Dy-, Er- und Yb-Isotope

With the Mössbauer technique, the hyperfine splittings of the lowest 2⁺-states of some Dy-, Er-, and Yb-isotopes were observed at 4.2 °K in the paramagnetic compounds Dy-Al-garnet, ErCl₃·6H₂O, and YbCl₃·6H₂O. Most of the sources were produced by photonuclear reactions. Ratios ofg-factors for neighbouring isotopes could be determined with small systematic errors. The results are:g ¹⁶⁴/g ¹⁶⁶=1.103 (15),g ¹⁶⁶/g ¹⁶⁸=0.960 (13) for Er, andg ¹⁷⁰/g ¹⁷²=1.009 (15),g ¹⁷⁰/g ¹⁷⁴=0.994 (13) for Yb. Using known values for the effective magnetic fields at the nuclei, the followingg-factors were obtained:¹⁶⁴Dy 0.336 (14),¹⁶⁴Er 0.353 (10),¹⁶⁶Er 0.320 (8),¹⁶⁸Er 0.333 (8),¹⁷⁰Yb 0.335 (6),¹⁷²Yb 0.332 (8),¹⁷⁴Yb 0.337 (8).