GD-O-GD DIMER FORMATIONIN XGD(2)O(3)CENTER-DOT(1-X)NA2O-CENTER-DOT-2B(2)O(3) GLASSES

Electron paramagnetic resonance (EPR), refractive index, Raman spectro scopy and density measurements were used to investigate the xGd(2)O(3) .(1 - x)Na2O . 2B(2)O(3) glass system with x less than or equal to 0. 10. EPR data proved the formation of Gd-O-Gd dimers with increasing ga dolinium oxide content. The line width of the EPR absorption peak at g approximate to 6 and the refractive index of the xGd(2)O(3) .(1 - x)N a2O . 2B(2)O(3) glass system present a similar behaviour as a function of the gadolinium oxide content. This behaviour was explained conside ring the process of Gd-O-Gd dimer formation.