2 documents found, page 1 of 1
Positronium formation and inhibition in binary solid solutions on Al (III) and ...
Machado, José Caetano; Carvalho, Cornélio de Freitas; Magalhães, Welington Ferreira de; Netto, Antonio Marques; Abbé, J. Ch.; Duplâtre, G.Positron 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 ...
Positronium formation in lanthanide (III) trifluoroacetate with 3-picoline-N-ox...
Netto, Antônio Marques; Carvalho, Cornélio de Freitas; Carvalho, Carlos Alberto Alves de; Sinisterra, Ruben Dario; Brito, Hermi Felinto dePositron annihilation lifetime and Doppler broadening annihilation radiation line shape on the salts Ln(CF3COO)3•xH2O and the adducts Ln(CF3COO)3(3-picNO)•xH2O (Ln=La–Pr, Sm–Lu and Y, and 3-picNO=3picoline-N-oxide, x in the range 0.75–1.33) were performed. Positroniumformation in the adducts, except for the europium complex, was observed. These results are discussed in terms of the electronic properties of the ...