Author/Authors :
Marques-Netto، نويسنده , , A and Carvalho، نويسنده , , C.F and Alves de Carvalho، نويسنده , , C.A and Sinisterra، نويسنده , , R.D and Brito، نويسنده , , H.F and Machado، نويسنده , , J.C، نويسنده ,
Abstract :
Positron 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=3 picoline-N-oxide, x in the range 0.75–1.33) were performed. Positronium formation in the adducts, except for the europium complex, was observed. These results are discussed in terms of the electronic properties of the central metal ions.
