Rare Earth Activated Oxyfluoride Glasses and Glass-Ceramics for Scintillation Applications

Abstract

Oxyfluoride glasses activated with Tb, Ce, Eu have been synthesized and studied. After heating at 580 and 750 crystalline phases were obtained. The samples were studied by DTA (Differential thermal analyzer), CL (cathodoluminescence), XRD (X-ray diffraction), SEM (scanning electron microscope), EDS (energy dispersive x-ray spectroscopy) methods. We found out that presence of crystalline phase enhances the CL of Tb activated samples significantly; whereas, the shortest decay time of 0.29 has been observed for less intense Ce doped glass sample.

Studies of radiation defects in cerium, europium and terbium activated oxyfluoride glasses and glass ceramics

“…As reported earlier, XRD studies of our samples indicated presence of LaF 3 and LiAlSiO 4 crystalline phases [11]. Fig.…”

“…Our previous studies showed luminescence intensity gain after heat treatment. We explained it with formation of LaF 3 crystallites [11].…”

“…The samples without activator hereinafter will be referred as SALL, those activated with 2% TbF 3 -SALL:Tb, 2% Eu 2 O 3 -SALL:Eu and with 2% CeO 2 -SALL:Ce. After a heat treatment at 750-800°C for 1 h glass ceramics have been formed [11].…”

“…In our previous researches [11,12] we have studied terbium, cerium and europium activated oxyfluoride glasses and glass ceramics using various methods: differential thermal analysis, X-ray diffraction, cathodoluminescence and X-ray induced luminescence. X-ray induced luminescence showed that among the studied samples the most intense was a terbium activated glass ceramics sample -the integrated area of the spectral curve was about 10 times smaller than that of etalon sample CsI:Tl.…”

Photoluminescence of Eu and Ce Activated Oxyfluoride Glass And Glass Ceramics/ Eu Un Ce Jonu Luminiscence Oksifluorīdu Stiklos Un Stikla Keramikā

“…These materials have many applications -as infrared sensors to visualise the IR light using the up-conversion process [1], scintillators [2] and visible light phosphors. It is possible to compare various properties of oxyfluorides using not only different components but also glasses and glass ceramics with the same base components or varying the rare-earth activators.…”