Structural and Thermoluminescence Investigations on γ-Ray Irradiated Limestone Sample

The present study reports the petrographical analysis and trap parameter calculation of γ-ray irradiated limestone sample collected from the Rasmada mines of Chhattisgarh Basin. A limestone sample was collected and preannealed before irradiation and recording of the thermoluminescence (TL) glow curve. The collected limestone sample was then characterized by X-ray diffraction, scanning electron microscopy (SEM), and TL glow curve analysis. The limestone sample revealed a cubic structure and its corresponding planes were calculated. SEM images showed a sound morphology and particle-size distribution above the microlevel.  The TL glow curve was recorded for various doses of γ-rays from 0.5 to 2 kGy, and the dual peaks were decomposed with a single intense glow curve. The corresponding trap parameters were calculated using a computerized glow curve deconvolution technique. The findings suggest that the investigated limestone  sample holds potential for application in gamma radiation dosimetry.

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