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[13p-PA7-9] Optically- and thermally- stimulated luminescences of Ce-doped SiO2 glasses prepared by spark plasma sintering
Keywords:Optically-stimulated luminescence,Thermally-stimulated luminescence,SiO2
Rare-earth doped inorganic materials have found practical applications in a number of areas. In radiation measurements, such materials are used in order to convert incident radiation to light so that the radiation is indirectly detected using a conventional photodetector. Examples of applications include radiographic imaging plates, scintillators, and dosimeters.
In this study, we have prepared and investigated the dosimetric properties of a SiO2 glass doped with Ce3+. The sample was synthesized by a Spark Plasma Sintering (SPS) technique after [4]. SiO2:Ce3+ is very appealing dosimetric material because the host material is considered to be equivalent to tissue, which means that that radiation energy deposited in SiO2 should be the same as that of human tissue. The SiO2:Ce3+ samples synthesized in this work exhibit a strong photoluminescence (PL) band emission in the range of 400 – 550 nm, which is due to the 5d-4f transitions by the Ce3+ ion. After irradiating the sample by X-rays, both an optically-stimulated luminescence (OSL) by a 630-nm stimulation as well as thermally-stimulated luminescence (TSL) are observed. The structure of TSL glow peak is very broad with the center around 200 °C. With these radiation induced effects, we have confirmed, with the measurement instruments available to us, the dose detection ranges are at least 1 mGy and 1 Gy for both OSL and TSL.
In this study, we have prepared and investigated the dosimetric properties of a SiO2 glass doped with Ce3+. The sample was synthesized by a Spark Plasma Sintering (SPS) technique after [4]. SiO2:Ce3+ is very appealing dosimetric material because the host material is considered to be equivalent to tissue, which means that that radiation energy deposited in SiO2 should be the same as that of human tissue. The SiO2:Ce3+ samples synthesized in this work exhibit a strong photoluminescence (PL) band emission in the range of 400 – 550 nm, which is due to the 5d-4f transitions by the Ce3+ ion. After irradiating the sample by X-rays, both an optically-stimulated luminescence (OSL) by a 630-nm stimulation as well as thermally-stimulated luminescence (TSL) are observed. The structure of TSL glow peak is very broad with the center around 200 °C. With these radiation induced effects, we have confirmed, with the measurement instruments available to us, the dose detection ranges are at least 1 mGy and 1 Gy for both OSL and TSL.