This optically stimulated luminescence (OSL) dating has become one of the most powerful methods for the dating of sediments in both archaeological and environmental contexts. S., 1982, Archaeomagnetic intensity results for the Near-East and for China (abstract), , 265, 40-41. He published a book on thermoluminescence dating in 1985, and an introduction to optical dating in 1998. From the 1960s he was involved in the development of thermoluminescence dating (TL), to date ceramic materials such as pottery, brick and tiles. C., 1976, Dating a settlement pattern by thermoluminescence - burnt mounds of Orkney, Archaeometry, 18, 5-17. J., 1976, Thermoluminescent age evaluation and assessment of error limits - revised system, (ed. He further developed the method by using blue/green light or infrared radiation instead of heat. J., 1968, Predose effects in thermoluminescence and in luminescence during irradiation, in (eds.
Before this, archaeologists and scientists relied on deductive dating methods, such as comparing rock strata formations in different regions.
Archaeologists and scientists use absolute dating methods on samples ranging from prehistoric fossils to artifacts from relatively recent history.
Chronometric techniques include radiometric dating and radio-carbon dating, which both determine the age of materials through the decay of their radioactive elements; dendrochronology, which dates events and environmental conditions by studying tree growth rings; fluorine testing, which dates bones by calculating their fluorine content; pollen analysis, which identifies the number and type of pollen in a sample to place it in the correct historical period; and thermoluminescence, which dates ceramic materials by measuring their stored energy.
In 1958, at the invitation of the archaeologist Graham Webster, he undertook the first archaeological proton magnetometer survey, on the Roman city of Durobrivae, near Water Newton, Cambridgeshire, detecting a kiln amongst other features. C., 1968, Thermoluminescent studies of lavas from Mt.
His instrument was a version of the device that had been tested by the Army for the detection of plastic mines. Etna and other historic flows: Preliminary results, in (eds.
Also in 1958, the Oxford laboratory published the first volume of the journal , was published in 1961.