Show simple item record Jacobs, Z. Duller, G. A. T. Wintle, A. G. 2011-04-21T08:37:42Z 2011-04-21T08:37:42Z 2006-03
dc.identifier.citation Jacobs , Z , Duller , G A T & Wintle , A G 2006 , ' Interpretation of single grain D-e distributions and calculation of D-e ' Radiation Measurements , vol 41 , no. 3 , pp. 264-277 . DOI: 10.1016/j.radmeas.2005.07.027 en
dc.identifier.issn 1350-4487
dc.identifier.other PURE: 158985
dc.identifier.other PURE UUID: 34477e9a-4299-41d9-9889-41f3beadb19d
dc.identifier.other dspace: 2160/6691
dc.description Sponsorship: NERC EFCHED Grant NER/T/S/2002/00677 (GATD) en
dc.description.abstract Recent development of an instrument for measuring the optically stimulated luminescence signal from individual mineral grains has made it practicable to measure the equivalent dose (De) from many hundreds or thousands of single mineral grains from a sample. Such measurements can potentially be used to address issues such as sample integrity, and to make it possible to obtain ages from samples that consist of mixtures of grains, enlarging the range of materials to which luminescence dating can be applied. However, for reliable ages to be obtained, the characteristics of the equipment and the sample being analysed need to be understood. Using sensitised sedimentary quartz grains, the instrumental uncertainty in repeated optically stimulated luminescence measurements made using a single grain laser luminescence unit attached to a conventional luminescence reader was evaluated; a value of 1.2% was obtained. Grains from this sample were then used to investigate the uncertainty in a measured dose distribution obtained using the single aliquot measurement protocol on each grain that had previously received a known laboratory dose; after systematic rejection of grains that did not pass defined acceptance criteria, overdispersion of 7% was found. Additional spread in data was found when uniform aeolian sands were examined, resulting in overdispersion of ∼ 12%; this was attributed to a combination of factors relating to differences in field and laboratory conditions. A similar value was found for an archaeological horizon below this sand. For another sample from the same section, a significantly larger value was found, ∼ 29%; on this basis the finite mixture model was applied to obtain the likely dose components. The paper demonstrates the importance of correct assessment of error terms when analysing single grain De distributions and a number of rejection criteria that are vital to avoid the inclusion of data that could lead to misinterpretation of the degree of scatter present. en
dc.format.extent 14 en
dc.language.iso eng
dc.relation.ispartof Radiation Measurements en
dc.rights en
dc.title Interpretation of single grain D-e distributions and calculation of D-e en
dc.type /dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article en
dc.contributor.institution Quaternary Environmental Change Group en
dc.contributor.institution Department of Geography and Earth Sciences en
dc.description.status Peer reviewed en

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