LiF:Mg,Cu,P glow curve shape dependence on heating rate

Area of Science:

• Solid State Physics
• Radiation Dosimetry
• Materials Science

Background:

• LiF:Mg,Cu,P (MCP) is a widely used thermoluminescent material for radiation dosimetry.
• Understanding the factors influencing its glow curve shape is crucial for accurate dose assessment.
• Heating rate is a critical parameter in thermoluminescence (TL) measurements.

Purpose of the Study:

• To investigate the influence of heating rate on the glow curve shape of LiF:Mg,Cu,P (MCP) phosphors.
• To analyze the shifting of dominant dosimetric peaks under varying heating rates.
• To examine these effects across different dosemeter configurations (chips, cards, powder).

Main Methods:

• Thermoluminescence (TL) measurements were performed on LiF:Mg,Cu,P (MCP) samples.
• Varying heating rates were applied during the TL readout process.
• Glow curves were analyzed and deconvoluted using the Harshaw Glow Curve Analyser (GCA) program.
• Different dosemeter forms (chips, cards, powder) were investigated.

Main Results:

• A noticeable shift in the dominant dosimetric peak was observed with changes in heating rate.
• The glow curve shape of LiF:Mg,Cu,P (MCP) is demonstrably dependent on the heating rate.
• Analysis revealed distinct peak shifting behaviors across different dosemeter configurations.

Conclusions:

• Heating rate is a significant factor affecting the thermoluminescence response of LiF:Mg,Cu,P (MCP).
• The observed peak shifts necessitate careful consideration of heating rate in dosimetry protocols.
• Further investigation into the underlying mechanisms for these observed effects is warranted.