Photoluminescence And Structural Characterization Of Re-Doped Sodium Aluminosilicate Oxyfluoride Glass And Nanocrystalline Glass-Ceramics As A Function Of Gamma-Irradiation Dose

Dy3+ and Eu3+-doped oxyfluoride glass and glass nanocomposites are subjected to low and high dose of gamma-irradiation, i.e., 100Gy and 1kGy, respectively. The photoluminescence spectra show changes in electric to magnetic dipole ratios signifying variations in local structural environment. Glass-ceramics depict the tendency of crystallization or the ordering of structure with increasing gamma-irradiation dose. The results are further supported with X-ray diffraction and scanning electron microscopy (SEM) measurements. The formation of nanometer size fluoride particles in the pristine glass and glass-ceramics after gamma-irradiation has been observed from SEM studies. Fourier transform infrared (FTIR) study reveals the restructuring of aluminosilicate network under gamma-irradiation.