Scintillation respond and orange emission from Sm³⁺ ion doped tellurite and fluorotellurite glasses: A comparative study

Abstract

In this study, the effect of trivalent samarium ion dopant on the tellurite (Te1) and fluorotellurite (FTe1) glasses properties have been investigated. The samples with compositions of the 54TeO2–10ZnO–35BaO-1Sm2O3 (Te1) and 54TeO2–10ZnF2–35BaO-1Sm2O3 (FTe1) were prepared by conventional melt quenching technique. The results shown that the densities and molar volume of the Te1 sample were 5.2443 g/cm3 and 28.7515 cm3/mol, respectively, while those of the FTe1 sample were 5.2731 g/cm3 and 30.0460 cm3/mol. The six bands of absorption spectra were observed at 946, 1084, 1236, 1383, 1491 and 1546 nm, which were the electron transitions from 6H15/2 to 6F11/2, 6F9/2, 6F7/2, 6F5/2, 6F3/2 and 6H15/2, respectively. The trends of the J-O parameters were found to be in the sequence of Ω4> Ω2> Ω6. The electron radiative relaxation from 4G5/2 to 6H5/2 (564 nm), 6H7/2 (600 nm),6H9/2 (646 nm) and 6H11/2 (708 nm) released four emission spectra peaks. The lifetime taken from the highest peak (4G5/2 to 6H5/2 transition) were 0.657 ms from Te1 sample and 0.976 ms FTe1 sample. Finally, the orange emitting from Sm3+ doped glasses were investigated by CIE 1931 chromaticity. Tellurite glass has an opportunity to apply in scintillator material.