Tl dating labs


09-Oct-2017 05:57

The new microscopes cater for current research into soil micromorphology and the function of ancient stone, bone and shell tools.This laboratory is dedicated to the basic sorting and analysis of archaeological materials and faunal materials, as well as sample preparation.

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Secure AQIS-approved space is provided for storage and analysis of archaeological materials under quarantine restrictions and there is storage for other materials.Following the natural zeroing event and subsequent burial, the natural minerals begin luminescence acquisition afresh from the ionizing radiation (alpha, beta and gamma) constantly provided by the decay of radioactive elements (U238, Th232, K40, Rb) present in the sediments and also from the cosmic rays.For calculating the age, the radiation energy stored in the mineral (known as Paleodose) and the annual radioactivity rate (annual dose) from the surrounding sediments has to be calculated.The laboratory has two portable gamma-ray spectrometry units to measure the on-site dose rate from gamma radiation, and laboratory determinations of sample radioactivity can be made using a Risø GM-25-5 low-level beta-counting unit and three Daybreak 583 thick-source alpha counters.

Ph D students and postdoctoral researchers are encouraged to become proficient in OSL sample preparation and measurement procedures, and in the analysis and interpretation of the resulting data.Luminescence dating provides absolute ages and has very important application in Quaternary geology and archaeology.



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