Improved computational procedure for evaluation of overlapping hyperfine parameter distributions in Mossbauer spectra
- 1 May 1981
- journal article
- Published by IOP Publishing in Journal of Physics E: Scientific Instruments
- Vol. 14 (5), 605-610
- https://doi.org/10.1088/0022-3735/14/5/018
Abstract
An improved method for computer analysis of Mossbauer spectra in terms of hyperfine parameter distributions is presented. The method evaluated by Phillips and Twomey (1962) is extended to include an additional constraint on the endpoints of the distribution function, and this algorithm is combined with an iteration procedure. This application of the method is illustrated in fitting a spectrum with a distribution in magnetic hyperfine fields using the iteration procedure to obtain directly from the spectrum values for the isomer shift, quadrupole interaction and line area ratios. The method is also used to determine the Fe2+/Fe3+ ratio from a paramagnetic spectrum with broadened non-Lorentzian lines. To obtain this an average correlation between isomer shift and quadrupole splitting has been assumed for iron in each of the two valence states. It is shown that spectra originating from symmetric distribution functions can be fitted equally well assuming either of two different correlations between isomer shift and quadrupole splitting, and an equation relating these two correlations is derived.Keywords
This publication has 14 references indexed in Scilit:
- Evaluation of hyperfine parameter distributions from overlapped Mossbauer spectra of amorphous alloysJournal of Physics E: Scientific Instruments, 1979
- On the iron valence states in B2O3-PbO-GeO2 glassesSolid State Communications, 1979
- Mössbauer study of the crystallogenesis of iron hydroxidesRevue de Physique Appliquée, 1979
- Mossbauer spectra analysis in amorphous system studiesJournal of Physics E: Scientific Instruments, 1976
- Mössbauer studies of thermal excitations in magnetically ordered microcrystalsApplied Physics B Laser and Optics, 1976
- A Mössbauer study of amorphous iron-phosphorus alloysJournal of Non-Crystalline Solids, 1976
- Model independent evaluation of overlapped Mossbauer spectraJournal of Physics E: Scientific Instruments, 1974
- Magnetism in Amorphous Fe-Pd-P AlloysPhysical Review B, 1972
- Temperature Dependence of the Magnetization of an Amorphous FerromagnetPhysical Review B, 1968
- A Technique for the Numerical Solution of Certain Integral Equations of the First KindJournal of the ACM, 1962