The particular advantage of luminescence dating is that the method provides a date for the archaeological artefact or deposit itself, rather than for organic material in assumed association.In the case of OSL sediment dating, suitable material (sand or silt-sized grains of quartz and feldspar) is usually available ubiquitously throughout the site.Fieldwork (within Southern England) including in-situ radioactivity measurements, sample collection and travel to and from site can be undertaken at a daily rate of £300 VAT.We are also able to conduct sample collection outside of the UK if the client is willing to cover additional transport, accommodation and subsistence costs.The alpha particle counting system Calph is a stand-alone low level alpha counter used for accurate alpha dose measurements.It is especially conceived for dating application in thermoluminescence analyses.
Warming is achieved through a heating strip in an inert atmosphere obtained thanks to a continuous air extraction by a vacuum pump and following introduction of nitrogen.
The older the pottery, the more radiation it has absorbed and the brighter the pottery sample glows.
By measuring the TL, we can calculate how much radiation has been absorbed and use this information to calculate the approximate age of the pottery.
When we receive your sample we must first prepare it for measurement.
Powder samples (from pottery and bronze cores) are mixed with acetone and allowed to settle, so that fine grains, approximately 1/100mm. These grains are deposited and dried onto aluminium discs (for fine-grain analysis) or rhodium (for pre-dose analysis).