Radiocarbon dating sample preparation

A full range of modern facilities is available to extract and purify quartz and feldspar grains for dating.There are five Risø instruments to stimulate and detect the OSL emissions for purposes of dose determination, three of which have focussed laser attachments to permit measurements of individual grains of quartz and feldspar.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.Amino acid racemisation dating of fossils, such as eggshell and mollusc shell, found at archaeological and geological sites is performed at the University of Wollongong in a new AAR laboratory housed in the School of Earth & Environmental Sciences.This laboratory is likewise equipped with state-of-the-art instruments to measure the chemical properties of minuscule samples, such as the individual foraminifera analysed by Colin Murray-Wallace and his team.C) dating of specific organic compounds is able to be completed at the Radiocarbon Dating Sample Preparation Laboratory within the School of Earth & Environmental Sciences.

All rooms are fitted with safelights, similar to a photographic darkroom.In this article, an overview is presented of the status of the radiocarbon dating of iron-based materials.Recent advances include simplification in sample preparation and reduction in sample size for accelerator mass spectrometry measurements, and the potential use of rust as a viable source of material for radiocarbon dating.The Wollongong Isotope Geochronology Laboratory (WIGL) implements isotopic and geochemical techniques to study geological and biological processes.It provides tools for applications to Quaternary and early Earth environmental studies, archaeological and biomedical sciences.

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