Dosimetric properties of α-Al₂O₃: Tm+PTFE phosphor

Area of Science:

• Materials Science
• Radiation Detection
• Solid-State Physics

Background:

• Alpha-alumina (α-Al₂O₃) is a well-known ceramic material.
• Thulium (Tm³⁺) doping can introduce desirable luminescent properties.
• Radiation dosimetry requires sensitive and stable materials.

Purpose of the Study:

• To synthesize and characterize Tm³⁺-doped α-Al₂O₃ for radiation dosimetry.
• To evaluate the dosimetric properties of α-Al₂O₃+PTFE pellets.
• To determine the kinetic parameters of the material's response.

Main Methods:

• Combustion synthesis of Tm³⁺-doped α-Al₂O₃.
• Pellet preparation by mixing with polytetrafluoroethylene resin (PTFE).
• Thermoluminescence (TL) measurements including glow curves, linearity, lower detection limit, repeatability, and fading.
• Kinetic parameter determination using deconvolution.
• Morphological analysis via low vacuum scanning electron microscopy and X-ray diffraction.

Main Results:

• Successful synthesis of Tm³⁺-doped α-Al₂O₃.
• α-Al₂O₃+PTFE pellets exhibited measurable thermoluminescence.
• Key dosimetric properties like linearity and repeatability were assessed.
• Morphological and structural characterization confirmed material properties.

Conclusions:

• The synthesized Tm³⁺-doped α-Al₂O₃+PTFE composite is a viable candidate for radiation dosimetry.
• The material demonstrates promising characteristics for radiation detection applications.
• Further research can optimize this material for enhanced dosimetric performance.