Thermoluminescence glow-curve deconvolution using analytical expressions: A unified presentation

Area of Science:

• Solid State Physics
• Materials Science
• Radiochemistry

Background:

• Thermoluminescence (TL) is a sensitive technique for studying defects in materials.
• Glow-curve deconvolution is essential for extracting kinetic parameters from TL data.
• Existing methods often lack flexibility and accessibility.

Purpose of the Study:

• To present a unified framework for TL glow-curve deconvolution using the R package "tgcd".
• To implement and compare various analytical and semi-analytical expressions for deconvolution.
• To provide a comprehensive, flexible, and openly accessible tool for TL analysis.

Main Methods:

• Development and application of the open-source R package "tgcd".
• Implementation of first-, second-, general-, mixed-order kinetics, and OTOR model expressions.
• Analysis of measured TL glow curves (CaF2:Dy) and simulated glow curves.

Main Results:

• The "tgcd" package offers a unified and flexible approach to TL glow-curve deconvolution.
• Consistency of kinetic parameters was assessed across different model expressions.
• The accuracy of computerized glow curve deconvolution (CGCD) depends on model choice and material properties.

Conclusions:

• Comparing kinetic parameters from different models enhances the reliability of deconvolution results.
• The choice of model expression and intrinsic trapping parameters significantly impacts CGCD accuracy.
• The "tgcd" package provides a valuable tool for researchers in thermoluminescence.