Thermoluminescence characteristics of marble and dating of freshly excavated marble objects

Surface exposure dating of non-terrestrial bodies using optically stimulated luminescence: A new method

“…If some part of this material is then exposed to daylight by erosion or fracture, the trapped charge population will begin to decrease at the exposed surface. In a sample which has been exposed to light for a prolonged period (decades to millennia) the remaining trapped charge will be zero (fully reset or bleached) at the surface and then increase towards saturation with depth (Polikreti et al, 2002(Polikreti et al, , 2003Laskaris and Liritzis, 2011;Sohbati et al, 2011Sohbati et al, , 2012a. The depth scale of this trapped charge profile depends on the opacity of the material and the daylight spectrum.…”

“…Following the suggestion of Polikreti et al (2002Polikreti et al ( , 2003, Sohbati et al (2011) showed that a nested exponential function of exposure time and depth could be used to describe the penetration of light in naturally-exposed granite cobbles. This simple derivation is not appropriate to non-terrestrial surfaces because of the much greater environmental dose rate discussed above.…”

A new mathematical approximation of sunlight attenuation in rocks for surface luminescence dating

“…The former upper layers imply that the bleaching of marble causes drop of luminescence within dozens of minutes to hours, taking into account, however, the residual signal caused by SOL exposure. The deeper layers indicate that solar penetration goes deep but bleaching of TL/OSL is very slow as a function of time exposure; the longer exposure time the deeper bleaching occurs that in some marble may reach 30 mm [10,13].…”

OSL surface exposure dating of a lithic quarry in Tibet: Laboratory validation and application

“…Sohbati et al (2011Sohbati et al ( , 2012aSohbati et al ( , 2012b proposed that the dependence of the OSL signal on depth and exposure-time could be described by a double exponential function: ) is the attenuation coefficient characterising light penetration into the rock. This model is based on first-order kinetics for luminescence decay and an exponential attenuation of light intensity with depth, and it predicts that the longer the exposure duration, the deeper the resetting of the luminescence signal into the rock surface (Habermann et al, 2000;Polikreti et al, 2002Polikreti et al, , 2003Laskaris and Liritzis, 2011;Sohbati et al, 2011Sohbati et al, , 2012a2012b). Thus, there exists chronological information in the luminescence-depth profile, but the estimation of exposure time requires an independent knowledge of the σφ 0 parameter, which is challenging to quantify from the first principles (Sohbati et al, 2011).…”