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  • Author or Editor: A. Babeshkin x
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Abstract  

57Co Mössbauer emission spectra of cobalt benzoylacetonate and 3-substituted acetyl-acetonates have been studied. All spectra reveal the same stabilized57Fe forms, though in a ratio depending on the substituent in the ligand. This dependence is interpreted in terms of the substituent effect on the nature of metal-ligand bonding.

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Abstract  

The energy absorbed by immediate surrounding of disintegrating119mSn nuclei have been estimated by comparing the Mössbauer emission spectra of119Sn in some tin compounds with the absorption spectra of the same substances after -irradiation and by simple calculations of Auger electrons energy losses. The results obtained indicate that the observed post-effects of the119mSn decay are due to self-radiolysis and other processes, whose contributions depend on the individual properties of the matrices.

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Abstract  

Simple calculations of energy losses afford an estimate of the energy of Auger electrons and X-rays absorbed by molecules containing a disintegrating57Co nucleus (approximately 35 to 50 eV). An attempt is made to determine the same quantity from the autoradiolysis model by comparing the relative abundances of various stable forms of the daughter atoms descendant from57Co with the yields of the radiolysis products formed under external irradiation in similar iron compounds. The experimental data thus obtained vary significantly from one compound to another, possibly because, apart from autoradiolysis of environmental species, other processes contribute to the observed post-effects of the57Co disintegration, such as fragmentation of excited complex molecules or rupture of chemical bonds caused by Coulomb repulsion, with subsequent recombination of fragment units.

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Abstract  

The mechanism of chemical transformations after57Co/119mSn/ decay in solids is discussed on the basis of recent results. The study of the effect of electron acceptor concentration indicates a significant role of mobile electrons during the stabilization process.

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