In the same way, more or less, OSL (optically stimulated luminescence) dating measures the last time an object was exposed to sunlight.) in quartz and feldspar optical stimulated luminescence (OSL) dating of both heated and sedimentary materials.
Thermoluminescence dating (TL) is the determination, by means of measuring the accumulated radiation dose, of the time elapsed since material containing crystalline minerals was either heated (lava, ceramics) or exposed to sunlight (sediments).
As a crystalline material is heated during measurements, the process of thermoluminescence starts.
Here we examine the interpretation of the sensitivity corrected growth curve as a function of dose, and the effect of changing measurement conditions (e.g.
preheat temperature, size of test dose, stimulation temperature) on the estimation of .
The method is a direct dating technique, meaning that the amount of energy emitted is a direct result of the event being measured.
Better still, unlike radiocarbon dating, the effect luminescence dating measures increases with time.To put it simply, certain minerals (quartz, feldspar, and calcite), store energy from the sun at a known rate.This energy is lodged in the imperfect lattices of the mineral's crystals.Once this sediment is deposited and subsequently buried, it is removed from light and is exposed to low levels of natural radiation in the surrounding sediment.Through geologic time, quartz minerals accumulate a luminescence signal as ionizing radiation excites electrons within parent nuclei in the crystal lattice.Different materials vary considerably in their suitability for the technique, depending on several factors.