This technique is based on the use of crystalline materials in which ionizing radiation creates electron-hole pairs (see below Active detectors: Semiconductor detectors).
In this case, however, traps for these charges are intentionally created through the addition of a dopant (impurity)...
Using new thermoluminescent dating technology on flints found surrounding the fossils, they were able to place The site at Jebel Irhoud isn’t new—it was discovered in the 1960s—but this latest excavation began in 2004.
New dating techniques allowed scientists to establish a consistent chronology for recently discovered fossils as well as to to re-date prior findings.
“Our findings suggest that modern human facial morphology was established early on in the history of our species, and that brain shape, and possibly brain function, evolved within the In light of these findings, scientists have to rethink the story of human evolution, including where and how it happened, as it seems the tale told until now has been incomplete.
“North Africa has long been neglected in the debates surrounding the origin of our species.
After burial the TL begins to build up again at a rate dependent upon the radiation flux delivered by long-lived isotopes of uranium, thorium and potassium.
This paper describes a thermoluminescent technique for dating archaeological pottery without isolating quartz from objects of dating.
The technique employs TLD-K soil-equivalent thermoluminescent Si O-based detectors for measuring the test dose of artificial irradiation and the background dose rate on the dig site.
Thermoluminescence (TL) dating of sediments depends upon the acquisition and long term stable storage of TL energy by crystalline minerals contained within a sedimentary unit.
This energy is stored in the form of trapped electrons and quartz sand is the most commonly used mineral employed in the dating process.