6533b82afe1ef96bd128ca71
RESEARCH PRODUCT
Mössbauer relaxation spectra in arbitrarily ordered absorbers—Line shape analysis for an iron(II) spincrossover complex in the presence of texture
Peter PoganiuchPeter AdlerHartmut Spieringsubject
Arrhenius equationNuclear and High Energy PhysicsMaterials scienceCondensed Matter PhysicsMolecular physicsAtomic and Molecular Physics and OpticsSpectral lineCrystallographysymbols.namesakeReaction rate constantMössbauer spectroscopysymbolsPhysical and Theoretical ChemistryAnisotropyAxial symmetryHyperfine structureShape analysis (digital geometry)description
The stochastic theory of Mossbauer line shapes is formulated in a fashion which allows the evaluation of the spectral shapes for absorbers of arbitrary thickness, texture, and an anisotropic Lamb—Mossbauer factor. The results are specialized to a two-state-relaxation model of fluctuating electric hyperfine interaction in the case of an absorber of axially symmetric texture. The formalism is applied to the line shape analysis of Mossbauer spectra of a textured sample of the spin-crossover complex [Fe(mtz)6] (PF6)2 (mtz=1-methyltetrazole). It is found that between 185 and 240 K the rate constants for the HS→LS conversion are temperature independent, whereas an Arrhenius behaviour is found for the LS→HS conversion.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1989-06-01 | Hyperfine Interactions |