Abstract
AbstractA theoretical investigation is made of the effect of vibronic coupling on the line shapes of Mössbauer spectra in an orbital degenerated E‐term system including relaxation transitions among the vibronic states and magnetic hyperfine interaction. The vibronic interaction is taken into account in the limiting case of strong linear coupling and arbitrary second‐order contribution. The quadrupole splitting of the energy levels for a nuclear spin I = 3/2 and the transition probabilities for I = 1/2 → I = 3/2 transitions were obtained. The effect of relaxation transitions on the line shape is studied on the basis of a generalized Kubo‐Andersen model. For a set of actual relaxation and vibronic parameter values the Mössbauer spectra are calculated numerically with a computer. The possibilities of comparison with experiment are discussed.
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