Mössbauer six-line spectra position analysis for Fe57 in metallic iron

The formulae for evaluating the parameters of magnetically split Mössbauer six-line spectra with quadrupole splitting from measured line positions are derived. Some special cases are considered and the suitability of the centre of gravity rule for the shift determination as well as the case of the internal magnetic field measurement from the distance of the outermost lines of the Mössbauer sextet are discussed. From the measured spectra of metallic iron the ratio of magnitudes of the nuclear magnetic moments for Fe⁵⁷ ¦ ₁/ ₀¦= 1·701±0·008 is derived by means of the proposed method. Further, the internal magnetic field intensity at the Fe⁵⁷ nucleus in metallic ironH _i =(329·4±1·2) kOe and other quantities are determined.The author is indebted to Dr. M. ernohorský for his continual encouragement and to Dr. J. Kuera for his valuable remarks on this paper. Thanks are also due to Mr. S. Havlíek and Mr. J. Hlavo for their help with the measurements and with the evaluation of the spectra.