Reason for line broadening in emission Mössbauer spectra |
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| Authors: | Yu D Perfiliev V S Rusakov L A Kulikov A A Kamnev K Alkhatib |
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| Institution: | (1) Department of Radiochemistry, Faculty of Chemistry, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia;(2) Department of General Physics, Faculty of Physics, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia;(3) Department of Radiochemistry, Faculty of Chemistry, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia;(4) Laboratory of Biochemistry of Plant-Bacterial Symbioses, Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 410049 Saratov, Russia;(5) Department of Radiochemistry, Faculty of Chemistry, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia |
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| Abstract: | Summary Resonant lines observed in source experiments are usually significantly broader thanthosein the corresponding absorber experiments.
In order to explain this phenomenon, the model of a trapped electron has been proposed. Auger electrons emitted, for instance,
after electron capture by 57Со or after the converted isomeric transition of119mSn, as well as secondary electrons, may be trapped in the vicinity of the nucleogenic ion. An asymmetric distribution of quadrupole
splittings in the resulting emission M?ssbauer spectra is thus a consequence of electron capture by lattice traps located
at different distances from the daughter ion. Estimates of quadrupole splitting values, which may be causedby trapped electrons
located at different distances from the nucleogenic atom, support the above mentioned model. |
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