Thermoluminescence in Pumice stone collected from the mediterranean coast.

Pumice is a low-density, light-coloured volcanic rock (igneous rock) formed when the magma due to volcanic eruption is suddenly cooled. It has a porous structure and can be in different colours and in different densities. Pumice stone, unlike regular rock, does not sink in water because it has a low density. In the present study, the thermoluminescent (TL) dosimetric characteristics, such as the dose-response, TL signal fading as a function of storage time, heating rate and reusability, of pumice collected on the Mediterranean coast were investigated. With this study, it is concluded that the pumice stone shows thermoluminescence properties with a TL glow curve including an obviously wide peak at∼200 °C. A wide linear dose-response region up to 144Gy, low fading of TL signal when it is kept in the dark room for a long time and a poor reusability property was observed for the dosimetric usage.