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Line Shape of Mössbauer Hyperfine Spectra
Author(s) -
Schwegler H.
Publication year - 1970
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19700410139
Subject(s) - hyperfine structure , paramagnetism , relaxation (psychology) , spectral line , mössbauer spectroscopy , line (geometry) , space (punctuation) , physics , operator (biology) , condensed matter physics , atomic physics , chemistry , quantum mechanics , mathematics , geometry , computer science , nuclear physics , psychology , social psychology , biochemistry , repressor , transcription factor , gene , operating system
Abstract A general theory of the line shape of Mössbauer hyperfine spectra is developed within the framework of a new operator space formulation. In the present paper, this theory is applied to hyperfine spectra in the paramagnetic region. The phenomenological Wickman equations are derived from a microscopic quantum mechanical starting point. Explicit expressions for the relaxation terms are obtained, which make possible their discussion and evaluation and a comparison of Mössbauer results with the results of other measurements, especially those of the longitudinal susceptibility χ ‖ . It is suggested that the discrepancies so far reported between Mössbauer and paramagnetic relaxation experiments are caused by the use of concentrated samples in the latter case.