Abstract
This paper presents the results of the preparation and characterization of dysprosium-doped calcium sulfate (CaSO4:Dy) phosphor, which was obtained by homogeneous precipitation from calcium acetate Ca(CH3COO-)2. Structural and morphological characteristics were studied using a scanning electronic microscope (SEM). The structure of all compounds was determined by X-ray diffraction method too. Thermoluminescence (TL) emission properties of CaSO4:Dy under gamma radiation effects were studied. This phosphor powder presented a TL glow curve with two peaks (Tmax) centered at around of 180 and 300 °C, respectively. The TL response of CaSO4:Dy as a function of gamma absorbed dose was linear in a wide range. Both emission and excitation spectra were also obtained. Results showed that this new preparation method of CaSO4:Dy TL phosphor is less expensive, cleaner and safer than the conventional preparation method.
Original language | English |
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Pages (from-to) | 623-625 |
Number of pages | 3 |
Journal | Applied Radiation and Isotopes |
Volume | 68 |
Issue number | 4-5 |
DOIs | |
State | Published - Apr 2010 |
Externally published | Yes |
Keywords
- CaSO
- Chemical co-precipitation
- Dosimetry
- Dy
- Gamma radiation
- Thermoluminescence