Thermoluminescence and Kinetic Analysis of Some Gamma Irradiated Rocks from Makkah, Saudi Arabia

In the present work, some rocks were collected from Makkah, Saudi Arabia. Thermoluminescence technique was utilized to investigate the possibility of using the samples as an accidental radiation dosimeter. After.-ray irradiation by Co-60 source, Makkah rocks sample revealed a TL-peak at 155 degrees C. The peak position is decreased with the increase of the.-dose. The chemical analysis of Makkah rocks was conducted using the XRF technique. The natural fading, the effect of temperature on the ability of the samples to be stored, the TL-signal and the optimum grain size of the samples were studied. The activation energy was calculated using the peak shape method. The TL-signal exhibits a linear response through the gamma dose range 0.01-1k Gy. In this range of exposure, the sample under study can be considered as an accidental dosimeter.