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Computation of force constant change of dilute Mössbauer impurities in metallic hosts from Mössbauer Parameters
Author(s) -
Puri R. K.,
Gupta L. R.
Publication year - 1977
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.2220830132
Subject(s) - impurity , mössbauer spectroscopy , debye model , force constant , debye , constant (computer programming) , condensed matter physics , resonance (particle physics) , doppler effect , chemistry , materials science , atomic physics , physics , crystallography , molecule , quantum mechanics , organic chemistry , computer science , programming language
Ratios of impurity‐host to host‐host spring force constants are computed from the temperature variation of recoilfree fraction and second order Doppler shift of Mössbauer Sn 119 atoms present as dilute impurity in hosts of various masses. The weighted mean temperatures θ(−2), θ(−1), θ(+1), and θ(+2) of Mössbauer impurity atoms in various hosts are calculated from the temperature variation of recoilfree fraction and second order Doppler shift. Such calculations of force constant change for various impurity‐host systems are made on the basis of nearest neighbour central forces model assuming Debye spectrum by taking account of relative weighting of resonance and localised modes of vibration. The computed results are interpreted to discuss how temperature, mass, and force constant changes would affect the Mössbauer parameters.