Thermoluminescence study of Barium based composite phosphor using gamma rays

Area of Science:

• Materials Science
• Solid-State Physics
• Radiation Detection

Background:

• Thermoluminescent (TL) materials are crucial for radiation dosimetry across various fields.
• Accurate measurement of radiation doses is essential in medical, physical, and nuclear applications.

Purpose of the Study:

• To investigate the thermoluminescence properties of Dy-doped Ba2BO3F for high-dose dosimetry.
• To synthesize and characterize a novel phosphor for radiation measurement applications.

Main Methods:

• Solid-state synthesis method for Ba2BO3F:Dy phosphor.
• Characterization using X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM).
• Detailed thermoluminescence (TL) analysis after gamma ray irradiation, including kinetic parameter examination.

Main Results:

• Crystallite size determined to be 72.56 nm via XRD and Debye's Scherrer method.
• Optimal TL glow curve achieved with 0.3 mol% Dy doping.
• Linear response observed for doses ranging from 20-3000 Gy.
• Activation energy (trap depth) calculated to be approximately 0.8 eV.

Conclusions:

• Dy-doped Ba2BO3F exhibits promising characteristics for high-dose radiation dosimetry.
• The material shows good fading resistance, reusability, and batch-to-batch homogeneity.
• The synthesized phosphor is suitable for applications requiring accurate measurement of high radiation doses.