Positronium formation and inhibition in binary solid solutions on Al (III) and Co (III) tris (acetylacetonates).

Machado, José CaetanoCarvalho, Cornélio de FreitasMagalhães, Welington Ferreira deNetto, Antonio MarquesAbbé, J. Ch.Duplâtre, G.2015-04-142015-04-141993MACHADO, J. C. et al. Positronium formation and inhibition in binary solid solutions on Al (III) and Co (III) tris (acetylacetonates). Chemical Physics, v. 170, n.2, p. 257-263, 1993. Disponível em: <http://www.sciencedirect.com/science/article/pii/030101049380071G>. Acesso em: 02 fev. 2015.0301-0104http://www.repositorio.ufop.br/handle/123456789/5079Positron annihilation lifetime spectroscopy has been applied in mixtures and in solutions of solid Al(W), Al(acac),, and Co(III), Co(acac)g, tris(acetylacetonates). For the solid solutions of Co(acac), in Al(a~+c)~, a strong inhibition of positronium formation is observed with increasing cobalt complex concentration, while there is no quenching of the positronium lifetime. In the solid mixtures the positronium formation probability decreases linearly with Co(acac)g concentration, while the positronium lifetime remains constant. The free volume model appears inadequate to explain the experimental results which are satisfactorily understood on the basis of the spur model.en-USPositronium formation and inhibition in binary solid solutions on Al (III) and Co (III) tris (acetylacetonates).Artigo publicado em periodicoO periódico Chemical Physics concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3577150739599.https://doi.org/10.1016/0301-0104(93)80071-G