Luminescence dating laboratory
Reliable age determinations can be obtained from 0.1ka to 200 ka. Equipment Our sample preparation laboratory is equipped with a magnetic separator and heavy liquid (sodiumpolytungstate) separation tools to isolate and clean the appropriate grain size fractions for each sample under darkroom conditions. Since a few years we shifted from thermal signal stimulation to optical stimulation and focussed our research on the applicabilty of the recently developed single aliquot dating procedures (SAR, SAAD). (2000) - The age and palaeo-environmental significance of the Kalahari sands in western Zimbabwe: a thermoluminescence study. six Elsec7286 low-level alpha counters Ris GM-25-5 low-level beta GM multicounter system low-background extended-energy range HPGe gamma spectrometer portable gamma spectrometer (Canberra portable plus model 1150) and 3x3 inch. This focus wil not change during the coming years 2003-2004.. (1998) Bijdrage tot de studie van de thermoluminescentie-dateringsmethode en toepassing op archeologisch keramiek en eolische sedimenten. Please do not send samples before contacting the Laboratory to establish cost and turnaround times.OSL dating results are provided in a report detailing the full procedures undertaken to measure the samples and the sample ages.Where larger or complex sampling programmes are being undertaken then it maybe advisable that a member of the laboratory should personally collect samples.This will assist in sampling strategies and allows in situ measurements of dose rate can be performed which enhances accuracy and precision.Samples should then be sent double wrapped clearly labelled with their sample code.Packages should be clearly marked "Inert geological samples, no commercial value to be tested to destruction. In addition to this, with each sample should be a fully completed Submission Sheet, full details of the site stratigraphy including sample locations.
Articles in international Journals (period 1998-2002) Van den haute P., Frechen M., Buylaert J. Through the use of multiple replicate measurements the report also details an assessment of the reliability of the data used to generate the ages and highlights any problems associated with the ages.We are happy to discuss dating results and have in the past contributed to technical reports, presentations and publications.Na I(Tl)detector) Chronostratigraphy and luminescence dating of the aeolian deposits of the western Chinese loess plateau: a contribution to the investigation of the terrestrial record of the Quaternary climate oscillations. (defended at the Laboratory of analytical chemistry) Munyikwa K. (2002) - A comparison of methods for the annual radiation dose determination in the luminescence dating of loess sediment. (2000) - Observations on the thermoluminescence signal induced by alpha irradiation. (1998) The stratigraphy, sedimentology and thermoluminescence dating of the Upper Kalahari beds of western Zimbabwe. (in preparation) A critical comparison and evaluation of methods for determination of the annual radiation dose in luminescence dating of sediments. - "Investigations on the origin of the equivalent dose distributions in Dutch coversand" Radiation Measurements. M., De Corte F., Van den haute P., Fuchs M., Murray A. Exploring the methodology of optically stimulated luminescence dating and comparison of optical and 14C ages of Late Weichselian coversands in the southern Netherlands. Nuclear Instruments and Methods in Physics Research A 490, 598-613.
After deposition of the grains and burial under new sediment, their latent luminescence signal accumulates again because they absorb the natural ionising radiation that is emitted by the surrounding sediment. The age that is determined corresponds to the time span between the removal of the luminescence signal by sunlight just before deposition and the removal of the newly accumulated palaeodose by thermal or optical stimulation in the laboratory.