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Author

Dimitri Vandenberghe

Other affiliations: Research Foundation - Flanders
Bio: Dimitri Vandenberghe is an academic researcher from Ghent University. The author has contributed to research in topics: Thermoluminescence dating & Holocene. The author has an hindex of 25, co-authored 85 publications receiving 1972 citations. Previous affiliations of Dimitri Vandenberghe include Research Foundation - Flanders.


Papers
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Journal ArticleDOI
TL;DR: In this article, the authors applied instrumental neutron activation analysis (INAA) to determine the U and Th concentrations in quartz fractions extracted from three covers and samples from the southern Netherlands.

190 citations

Journal ArticleDOI
TL;DR: In this article, the applicability of two different approaches in the luminescence dating of old (>70 ka) Chinese loess is investigated, and the results suggest that conventional SAR-OSL and SAR-IRSL protocols at these sites should be restricted to samples of ages not exceeding ∼40-50 and ∼100-120 ka, respectively.

174 citations

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TL;DR: In this paper, a single-aliquot regenerative-dose (SAR) procedure is used for the equivalent dose (D e ) determinations and the suitability of the measurement protocol is confirmed by dose recovery tests.

142 citations

Journal ArticleDOI
TL;DR: In this article, the bleachability of IRSL measured at 50°C (IR50) and post-IR50 elevated temperature IRSL (measured at 225°C and at 290°C) was investigated by measuring the apparent (residual) doses recorded by these signals.
Abstract: Using a set of modern/young (0 to about 200 years old) dust samples collected from the Chinese Loess Plateau the bleachability of IRSL measured at 50°C (IR50) and post-IR50 elevated temperature IRSL (measured at 225°C and at 290°C) is investigated by measuring the apparent (residual) doses recorded by these signals. Doses recorded by quartz OSL are used as a reference. Allowing for differences in dose rates it seems that both IRSL and post-IR IRSL signals yield residual doses that are significantly larger than the doses measured in quartz. These residual doses can be largely explained by thermal transfer caused by preheating. Nevertheless, we advise against the use of a low temperature preheat (<200°C) with IR50 to date loess samples because, as has been reported before, the signal appears to be thermally unstable. In general, we conclude that it may not be advisable to apply post-IR IRSL dating to Chinese loess samples where residuals of up to ∼20 Gy are a significant fraction of the total dose. However, these residuals quickly become unimportant when dating older samples, and this is the age range in which post-IR IRSL dating is likely to be most useful.

135 citations

Journal ArticleDOI
TL;DR: In this paper, the luminescence characteristics of fine-grained quartz extracts are investigated to some extent, and indicate that the applied laboratory measurement procedure (SAR) is reliable.

120 citations


Cited by
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Journal ArticleDOI
TL;DR: Different single-aliquot regenerative-dose (SAR) protocols have been applied for some years to quartz grains for determining the equivalent dose, in both dating and retrospective dosimetry studies as mentioned in this paper.

1,568 citations

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TL;DR: In this article, the authors determined fading rates for various sedimentary feldspar samples using different stimulation and detection windows, and found that the initial and final parts of the OSL signal bleach at approximately the same rate.

641 citations

Journal ArticleDOI
01 Jul 2012-Boreas
TL;DR: In this paper, the authors proposed a post-IR IRSL (IRSL) method for the dating of Middle and Late Pleistocene sediments, which appears to avoid signal instability.
Abstract: Luminescence dating is used extensively to provide absolute chronologies for Late Pleistocene sediments. Nowadays, most optical dates are based on quartz optically stimulated luminescence (OSL). However, the application of this signal is usually limited to the last ∼100 ka because of saturation of the quartz luminescence signal with dose. In contrast, the feldspar infrared stimulated luminescence (IRSL) dose–response curve grows to much higher doses; this has the potential to extend the datable age range by a factor of 4–5 compared with quartz OSL. However, it has been known for several decades that this IRSL signal is unstable, and this instability often gives rise to significant age underestimation. Here we test against independent age control the recently developed feldspar post-IR IRSL approach to the dating of sediments, which appears to avoid signal instability. A physical model explaining our observations is discussed, and the method is shown to be accurate back to 600 ka. The post-IR IRSL signal is reduced by exposure to daylight more slowly than that from quartz and low-temperature IRSL, preventing its general application to young (e.g. Holocene) sediments. Nevertheless, this new approach is widely applicable (feldspar of appropriate luminescence behaviour is even more ubiquitous than quartz). These characteristics make this a method of great importance for the dating of Middle and Late Pleistocene deposits.

573 citations

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TL;DR: The authors reviewed the developing body of evidence pertaining to shifts in the winter rainfall zone (WRZ) and the evolution of ideas that have been presented to explain the patterns observed, and divided the region into three separate axes, along the western and southern margins of the continent and across the interior into the Karoo and the Kalahari.

557 citations

Journal ArticleDOI
TL;DR: Thomsen et al. as mentioned in this paper proposed a post-IR IR dating protocol on K-feldspar extracts from a variety of locations and depositional environments and compare the results with those from the conventional IR at 50°C protocol.

521 citations