Ag-doped Phosphate Glass Research Articles

Environmental Radiation Monitoring Using Radiophotoluminescence in Silver-Doped Phosphate Glass

Optical properties such as optical absorption and radiophotoluminescence (RPL) spectra of silver (Ag+)-doped phosphate glass before and after x-ray irradiation were investigated in this study. It is found that the RPL spectrum consists of two emission bands which are peaked at 2.70eV (460nm blue emission) and 2.21eV (560nm yellow emission). It is also found that RPL emission intensity gradually increases with x-ray irradiation dose. From the results it is suggested that origin of each 460nm and 560nm RPL emission band is ascribed to Ag0 ion and Ag2+ ion, respectively, which are produced by x-ray irradiation. The application of the RPL phenomenon in Ag-doped phosphate glass to the environmental natural radiation monitoring is also demonstrated.

Emission mechanism of radiophotoluminescence in Ag-doped phosphate glass

Abstract The objective of this study is to investigate the emission mechanism of radiophotoluminescence (RPL) in the Ag + -doped phosphate glass (glass dosimeter), which is now used as individual radiation dosimeter, because the emission mechanism of RPL in glass dosimeter was not fully understood. Optical properties such as optical absorption spectrum, RPL spectrum and change of RPL spectrum as a function of X-ray irradiation dose were measured for commercially available glass dosimeter. In this study, we discuss the emission mechanism of two RPL peaks at 460 nm and 560 nm, based on the fact that electrons and holes produced by X-ray irradiation are trapped at Ag + ions to produce Ag 0 and Ag 2+ ions, respectively, when the Ag + -doped phosphate glass is exposed to X-ray. We would like to propose the emission mechanism of RPL peaks at 460 nm and 560 nm, concerning with Ag 2+ and Ag 0 ions.

Colloid Formation in Implanted Glasses

ABSTRACTMetal colloids in glasses can yield an enhanced (χ((3)) susceptibility which leads to an intensity dependent refractive index. Ion implantation is a convenient means of introducing the metal species. The host glass plays an important role in colloid formation. We have characterized Ag-colloid formation in various silicate glasses and, in addition, have studied the formation of colloids in Ag-doped phosphate glass as a function of N and H implantation. Some preliminary results for Cu-implanted glasses are presented.