Abstract
The hyperfine transition from the 8·42 kev level to the groundstate of Tm169 was investigated using the Mössbauer-Effect in Tm-metal in the temperature range between 5° K and 60° K. Well resolved hyperfine spectra were found between 5° K and 25° K indicating an internal magnetic field of about 7×106 Oe and a large electric fieldgradient. The ratio of the magnetic moments of the 8·42 keV rotational state to the groundstateμ a /μ g =−2·33±0·04 was deduced from these measurements. The magnetic moment of the groundstate and the quadrupole moment of the 8·42 kev level were deduced from calculated internal fields. These data were analyzed in terms of the “Unified Nuclear Model” and the results compared with other known magnetic moments andM-1-transition probabilities in theK=1/2 rotational band of Tm169. The complicated hyperfine spectra obtained above 25° K reveal the influence of complex magnetic ordering on the internal fields in Tm-metal.
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IBM-Forschungslaboratorium Zürich.
Herrn Professor H.Maier-Leibnitz und Herrn Professor W.Meissner danken wir für die Förderung der Experimente. HerrKullmann half uns beim Bau der Temperaturregelung. Den HerrenHagn, Wenninger undWerner danken wir für die zuverlässige Ausführung der mechanischen Aufbauten.
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Kalvius, M., Kienle, P., Eicher, H. et al. Magnetisches Moment und Quadrupolmoment des 8,42 keV-Zustandes von Tm169 aus der Hyperfeinstrukturaufspaltung in Tm-Metall. Z. Physik 172, 231–238 (1963). https://doi.org/10.1007/BF01377743
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DOI: https://doi.org/10.1007/BF01377743