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The Mössbauer Effect and its Significance in Chemistry
Author(s) -
Fluck E.,
Kerler W.,
Neuwirth W.
Publication year - 1963
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.196302771
Subject(s) - resonance fluorescence , diamagnetism , chemistry , resonance (particle physics) , fluorescence , atom (system on chip) , excitation , atomic physics , spectral line , mössbauer spectroscopy , prussian blue , recoil , nuclear magnetic resonance , crystallography , physics , optics , magnetic field , electrode , quantum mechanics , astronomy , computer science , electrochemistry , embedded system
Resonance fluorescence of recoil‐free γ‐rays from atomic nuclei depends on the state of the chemical bonding of the atoms. The latter influences the position of the energy level of the atomic nuclei, so that the energy required for excitation of resonance fluorescence is somewhat smaller or greater than the energy of the γ‐quanta emitted by the radiation source. In order to obtain resonance fluorescence, therefore, the radiation source and absorber have to be kept moving relative to each other. If the intensity of the resonance fluorescence is plotted against this relative velocity, Mössbauer spectra are obtained. The positions of the lines in these spectra make it possible to draw conclusions about the nature of the atom's bonds. The efficiency of this method is demonstrated by illustration with numerous iron compounds. It was shown, for instance, that the iron atoms in “insoluble Prussian Blue” have well‐defined oxidation levels. “Turnbull's Blue” shows the identical spectrum. A structure could be ascribed to tri‐iron dodecacarbonyl that also explains the diamagnetism of the compound.