Thermoluminescence dating of sand dunes in rajasthan
The radiation dose rate is calculated from measurements of the radioactive elements (K, U, Th and Rb) within the sample and its surroundings and the radiation dose rate from cosmic rays.The dose rate is usually in the range 0.5 - 5 grays/1000 years.A sample in which the mineral grains have all been exposed to sufficient daylight (seconds for quartz; hundreds of seconds for potassium feldspar) can be said to be of zero age; when excited it will not emit any such photons.The older the sample is, the more light it emits, up to a saturation limit.
There are advantages and disadvantages to using each.
It includes techniques such as optically stimulated luminescence (OSL), infrared stimulated luminescence (IRSL), and thermoluminescence dating (TL).
"Optical dating" typically refers to OSL and IRSL, but not TL.