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ABSTRACT
This study investigated the thermoluminescence (TL) performance of magnesium carbonate trihydrate (MgCO3.3H2O) synthesized via a green route using aqueous leaf extract of Eucalyptus globulus as a natural chelating and stabilizing agent. The synthesized material was structurally and morphologically confirmed to be phase-pure crystalline MgCO3.3H2O through X-ray diffraction (XRD), transmission electron microscopy (TEM), and photoluminescence (PL) analysis. The radiation-induced TL response was evaluated using beta irradiation, and its dosimetry suitability was systematically assessed by dose- response, repeatability, variable heating rate (VHR), fading, and activation energy studies. The results revealed a measurable TL signal upon irradiation, indicating the material's capability for radiation sensing. Glow curve analysis under different heating rates suggested possible thermal quenching. Kinetic interpretation of the glow curves indicated second-order kinetics, which is consistent with contributions from overlapping trapping centers. The average activation energy was determined to be 0.59 with a standard error of 0.08 eV, supporting the presence of thermally activated charge trapping and release processes. Overall, MgCO3.3H2O demonstrates promising potential as a TL dosimetry material for further investigation in thermoluminescence-based dosimetry and radiation monitoring applications.
Keywords: Bioengineering, Magnesium carbonate trihydrate, Radiation and Thermoluminescences