And magnetic hyperfine interaction

The underlying physics and analysis of Mossbauer spectra have been explained in detail in Chap. 4. In that chapter, the principles of how a spectrum is parameterized in terms of spin-Hamiltonian (SH) parameters and the physical origin of these SH parameters have been clarified. Many Mossbauer studies, mainly for Fe, have been performed and there is a large body of experimental data concerning electric-and magnetic-hyperfine interactions that is accessible through the Mossbauer Effect Database. 

Albracht SPJ, Roseboom W, Hatchikian E. The active site of the [FeFe]-hydrogenase from Desulfovibrio desulfuricans. I. Light sensitivity and magnetic hyperfine interactions as observed by electron paramagnetic resonance. J Biol Inorg Chem. 2006 11(1) 88—101. 

Terms describing the Zeeman and magnetic hyperfine interactions must be added to (9.172). The complete Zeeman Hamiltonian for a molecule in a 25+1A state is given by Nelis, Beaton, Evenson and Brown [76] as... 

Another technique widely used for characterizing ferrisilicates is Fe Mossbauer spectroscopy, a very sensitive tool able to differentiate the nuclei in slightly different electronic environments. The electron density of the nuclei, determined by the oxidation state, the coordination number and the type of ligands produce a Mbssbauer isomer shift (IS), while nuclear and magnetic hyperfine interactions are responsible for the form of the spectrum. 

Abstract This chapter describes a general introduction of the Mossbauer spectroscopy. What is the Mossbauer effect and what is the characteristic feature of the Mossbauer spectroscopy These questions are answered briefly in this chapter. Mossbauer spectroscopy is based on recoilless emission and resonant absorption of gamma radiation by atomic nuclei. Since the electric and magnetic hyperfine interactions of Mossbauer probe atom in solids can be described from the Mossbauer spectra, the essence of experiments, the hyperfine interactions and the spectral line shape are discussed. In addition, the experiments and the new resonance technique with synchrotron radiation have been also briefly described. 

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