研究目的
To study and analyze the effect of Eu2+- Er3+ codoping on the TL behavior of the silicate phosphors.
研究成果
The synthesized Eu2+ and Er3+ doped ASiO3 phosphors exhibit enhanced thermoluminescent properties with deep trapping mechanisms and second-order kinetics, making them suitable for radiation sensing and mapping applications. Gamma-irradiated phosphors show better low-fading characteristics compared to UV-irradiated ones.
研究不足
The paper does not explicitly mention specific limitations, but potential areas include the use of solid-state synthesis which may lead to agglomeration, and the focus on specific doping concentrations and irradiation conditions that may not cover all possible variations.
1:Experimental Design and Method Selection:
The study involves synthesizing ASiO3 (A= Ca, Ba, Sr) phosphors doped with Eu2+ and Er3+ ions using conventional solid state reaction method, followed by structural, morphological, and thermoluminescent analyses. Theoretical models include crystallographic analysis and kinetic parameter estimation using CGCD and peak shape methods.
2:Sample Selection and Data Sources:
Samples are synthesized with doping concentrations varying from 0 mol% to 1 mol% for both Eu2+ and Er3+ ions. Primary reactants include CaCO3, BaCO3, SrCO3, SiO2, Eu2O3, and Er2O3 with 99.99% purity from Sigma Aldrich.
3:99% purity from Sigma Aldrich.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment includes PANalytical XPERT-Powder X-ray diffractometer for PXRD, JEOL-JSM-5200 for FESEM, Hitachi H-600 TEM analyzer, and TL/OSL Reader 1008 from Nucleonix Systems. Materials are the chemical reactants listed.
4:Experimental Procedures and Operational Workflow:
Synthesis involves grinding stoichiometric mixtures, calcining at 1000°C for 1.5 hr, grinding again, and heating at 1350°C for 4 hrs. PXRD, FESEM, and TEM analyses are performed. TL behavior is studied after UV (254 nm for 5 min) and gamma (5 Gy from Co60 source) irradiation, with heating at 10°C/s up to 500°C.
5:5 hr, grinding again, and heating at 1350°C for 4 hrs. PXRD, FESEM, and TEM analyses are performed. TL behavior is studied after UV (254 nm for 5 min) and gamma (5 Gy from Co60 source) irradiation, with heating at 10°C/s up to 500°C.
Data Analysis Methods:
5. Data Analysis Methods: Kinetic parameters (activation energy, order of kinetics, etc.) are estimated using CGCD technique with Glowfit and TLanal software, and peak shape method.
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