Time-space evolution of the cloud of ion-electron pairs formed by Auger electrons around Mossbauer ion 57Fe n+

Autor: Yu. D. Perfil’ev, Vsevolod M. Byakov, Sergey V. Stepanov, Leonid A. Kulikov
Rok vydání: 2009
Předmět:
Zdroj: Moscow University Chemistry Bulletin. 64:259-263
ISSN: 1935-0260
0027-1314
DOI: 10.3103/s0027131409050058
Popis: It is shown that the emission of energetic Auger electrons during formation of the Mossbauer nucleus 57Fe leads not only to the formation of multicharged ion 57Fen+, but also to the formation of a cloud of several hundred (200–300) ion-electron pairs (H2O+, e−) around the Fe ion. This cloud is called an Auger blob. Its size (radius) is approximately ∼100 A. Fast radiation-chemical reactions in an Auger blob determine the experimentally observable ratio of yields of final chemically stable states (Fe3+ and Fe2+) of the Mossbauer ion. Knowledge of this ratio is important for an adequate interpretation of the results of Mossbauer emission spectroscopy. Although our assessments relate to iron nuclei in frozen aqueous solutions, they can be easily adjusted for media of other chemical composition.
Databáze: OpenAIRE
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