Abstract
The number of Moessbauer quanta from the 23.8 keV state of Sn119 in a tin metal source was measured after attenuation by a 16.1 mg/cm2 absorber of tin metal, as a function of temperature above and below the transition point of superconductivity. Source and absorber were kept at the same temperature. The data give evidence of a discontinuous change at the transition temperature: The transmitted intensity is lowered by (1,3±0.15)·10−3 in the superconducting state of source and absorber. This corresponds to an increase of the Debye-Waller-factor by about 0,4%.
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Gast vom Institut für Theoretische Physik der Universität München.
Herrn Professor H.Maier-Leibnitz sowie Herrn Professor W.Meissner danken wir für die stetige Förderung dieses Experimentes. Für die Vorbehandlung der Zinnquellen und Absorber danken wir Herrn Dr.Baumgärtner.
HerrSchnell und Herr Dr.Stanek leisteten wertvolle Hilfe beim Aufbau der Elektronik. Ihnen möchten wir vielmals danken.
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Wiedemann, W.H., Kienle, P. & Pobell, F. Mößbauer-Effekt im normalleitenden und supraleitenden Zustand von Sn119 . Z. Physik 166, 109–114 (1962). https://doi.org/10.1007/BF01378526
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DOI: https://doi.org/10.1007/BF01378526