Thermoluminescence response and trap parameters determination of gamma exposed Ce doped SrS nanostructures

Thermoluminescence of Ce doped SrS nanostructures exposed to Co-60 gamma radiations (0.1 Gy to 7 kGy) has been investigated. TL glow curves for gamma doses in the range of 0.1–200 Gy, consist of a dominant peak at 386 K with a very weak peak at 538 K. At higher doses (1–7 kGy), the peak at 386 K shifts to the higher temperature of 421 K, while the other peak at 538 K becomes more intense. This anomalous shifting of the first peak from 386 K to 421 K has been explained in the framework of Chen's peak shape method. Kinetic analysis of the experimental TL glow curve has been carried out using glow curve deconvolution (GCD) functions to determine the trapping parameters.