Dose estimation using quartz OSL in the non-linear region of the growth curve.
The reliability of equivalent-dose determinations on quartz made with the single-aliquot regenerative-dose (SAR) protocol is examined using a suite of sedimentary samples for which the equivalent dose is expected to be >200 Gy. Experiments on one sample were used to evaluate the precision obtained using the standard measurement procedure with (a) a range of pre-heat temperatures, and (b) a single pre-heat temperature. The precision is compared with that achieved using SAR for a repeated dose point after an initial pre-heat, and for a known dose given before the initial pre-heat. It is concluded that, at least for this sample, the scatter in OSL measurements dominates the spread in the estimates of De.
Murray
A S
AS
Department of Earth Sciences, Aarhus University, Risø National Laboratory, Roskilde, Denmark. andrew.murray@risoe.dk
Wintle
A G
AG
Wallinga
J
J
D008163:Luminescent Measurements; D011791:Quartz / Q000737:chemistry*; D011868:Radioisotopes / Q000032:analysis; D011874:Radiometry / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
D011868:Radioisotopes; D011791:Quartz