Assessing the effectiveness of the double-SAR protocol in isolating a luminescence signal dominated by quartz

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dc.contributor.author Roberts, Helen M.
dc.date.accessioned 2011-05-31T10:29:08Z
dc.date.available 2011-05-31T10:29:08Z
dc.date.issued 2007-11
dc.identifier.citation Roberts , H M 2007 , ' Assessing the effectiveness of the double-SAR protocol in isolating a luminescence signal dominated by quartz ' Radiation Measurements , vol 42 , no. 10 , pp. 1627-1636 . , 10.1016/j.radmeas.2007.09.010 en
dc.identifier.issn 1350-4487
dc.identifier.other PURE: 162223
dc.identifier.other dspace: 2160/6823
dc.identifier.uri http://hdl.handle.net/2160/6823
dc.description Roberts, H.M. (2007). Assessing the effectiveness of the double-SAR protocol in isolating a luminescence signal dominated by quartz. Radiation Measurements 42 (10), 1627-1636. en
dc.description.abstract The effect of the presence of feldspars that can be shown to exhibit anomalous fading is investigated using the double-SAR protocol. This protocol has been suggested as a method of isolating an optically stimulated luminescence (OSL) signal dominated by quartz from a polymineralic mixture of grains. The progressive removal of feldspars from the silt-sized fraction of sediments from Bignell Hill, Nebraska, is also investigated using chemical treatment with hydrofluorosilicic acid for different durations; the appropriate treatment duration for these sediments is identified as being 7 days. For untreated material, the double-SAR protocol yields IRSL and [post-IR] OSL signals that are both dominated by feldspars and that give the same value for the equivalent dose (D-e) determination. However, for material treated with hydrofluorosilicic acid for 7 days, the IRSL and [post-IR] OSL signals have distinctly different characteristics and appear to be dominated by feldspar and by quartz, respectively. Furthermore, the D-e values determined for the feldspar-dominated IRSL signal are about half those obtained for the quartz-dominated [post-IR] OSL signal. This demonstrates that the double-SAR protocol is not always capable of isolating a quartz-dominated signal; clearly, in some circumstances it is necessary to apply a chemical pre-treatment to remove the contribution from feldspars prior to any luminescence measurements being made. en
dc.format.extent 10 en
dc.language.iso eng
dc.relation.ispartof Radiation Measurements en
dc.title Assessing the effectiveness of the double-SAR protocol in isolating a luminescence signal dominated by quartz en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1016/j.radmeas.2007.09.010
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.contributor.institution Quaternary Environmental Change Group en
dc.description.status Peer reviewed en


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