Osl age dating

For dose rate calculation, high resolution gamma spectrometry measurements are performed on the sediments around the OSL samples.By OSL measurements of quartz grains, up to about 100 ka ages can be determined, while by the post-IR IRSL measurements of feldspar, some 100 ka ages can be calculated.OSL is an acronym for Optically-Stimulated Luminescence.Optically-Stimulated Luminescence is a late Quaternary dating technique used to date the last time quartz sediment was exposed to light.1), according to the SAR-OSL (Single Aliquot Regenerative Dose) protocol.By the measurement of the natural luminescence signal of the mineral grains and then the luminescence signals response to different artificial radioactive doses, it is possible to calculate the dose (equivalent dose) which was absorbed by the sediment from the time of its burial (Fig. The equivalent dose divided by the dose which was absorbed by the buried sediment in a unit time (dose rate), gives the OSL age.Strata Data offers a dating service using the Optically Stimulated Luminescence (OSL) technique.

The number of trapped electrons depends on the total amount of radiation that the mineral has been exposed to. Stimulating samples using infrared light causes luminescence, the intensity of which varies depending on the amount of radiation absorbed.Exposure to sunlight resets the luminescent signature and so the time period since the sediment was buried can be calculated.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.

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