Search

The optical, photo, and X-ray luminescence properties of Sm3+ ion-doped Li2O-Al2O3-Gd2O3-B2O3-P2O5 glasses are evaluated. The glasses are fabricated by the melt quenching technique. The absorption spectra exhibit the hypersensitive transitions 6H5/2→6P3/2 and 6H5/2→6F7/2 0at the visible and near-infrared range respectively. The glasses display four major transitions characteristic of Sm3+ ion for photoluminescence and X-ray luminescence, with the most intense one corresponding to the 4G5/2→6H7/2 transition. The best emitting samarium concentration obtained by X-ray excitation is compared to BGO crystals. The integral scintillation efficiency of glass is determined by total area under all of peak spectrum. The results indicate the promising application of these glasses in scintillators and for X-ray sensing devices. [ABSTRACT FROM AUTHOR]

In this work, potassium aluminium phosphate (K2O-Al2O3-P2O5) glasses doped with various concentrations of samarium oxide (Sm2O3) were prepared by melt-quenching technique. The structural, optical and luminescence properties of the glass samples were characterized through the molar volume, absorption and emission spectra measurements, respectively. The absorption spectra were investigated in the ultraviolet - visible light - near infrared (UV-Vis-NIR) region from 250 to 2,000 nm. The emission spectra were observed four prominent emission bands centered at 561, 597, 643, and 704 nm by excitation at 402 nm. From the Judd-Ofelt (J-O) analysis, the J-O parameters (Ω2, Ω4 and Ω6), oscillator strength (f), radiative transition possibility (AR), stimulated emission cross section (σ(λp)) and branching ratio (βR) were determined to investigate the local structure and bonding in the vicinity of Sm3+ ions, including quality of a glass host for using as the optical device application. [ABSTRACT FROM AUTHOR]