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Theory of Time‐Dependent Mössbauer Emission Spectra under Relaxation Conditions
Author(s) -
Afanasev A. M.,
Gorobchenko V. D.
Publication year - 1976
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.2220760204
Subject(s) - hyperfine structure , relaxation (psychology) , mössbauer spectroscopy , asymmetry , spectral line , atomic physics , atom (system on chip) , chemistry , line (geometry) , physics , condensed matter physics , quantum mechanics , mathematics , crystallography , geometry , psychology , social psychology , computer science , embedded system
General formulas are given for the profile of the Mössbaner emission spectra measured within a finite time interval following the preceding decay, under conditions when the initial electronic state of the Mössbauer atom is in non‐equilibrium. The results obtained are valid for an arbitrary case in which the hyperfine interactions change during the relaxation process, as well as for arbitrary ratios between the lifetime of the Mössbauer nucleus, the relaxation time, and a characteristic hyperfine frequency. The case is discussed in detail when the relaxation process is accompanied by a change of the isomer shift. It is shown that, even for rather short relaxation times, the relaxation process reveals itself through a noticeable asymmetry of the emission line.