Evidence of shallow TL peak contributions in infrared radiofluorescence

Huot, Sébastien; Frouin, Marine; Lamothe, Michel

doi:10.1016/j.radmeas.2015.05.009

Cited by 10 publications

(14 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results suggest that the given dose can be recovered with sufficient accuracy using the experimental conditions in our IRSAR procedure (Table S1) We also tested the RF 70 procedure (Frouin et al, 2017) on our samples. Preliminary tests showed that IR-RF measurements made at 70°C did not improve the shapes of the decay curves for our samples, in contrast to the findings of Huot et al (2015) and Frouin et al (2017). Nevertheless, the RF 70 procedure yields slightly different results to those obtained using the IRSAR procedure: the RF 70 signal intensity is higher and the calculated D e values differ by 11-65 Gy, with the RF 70 values being larger in some instances and smaller in others (Table 1); two examples are shown in Fig.…”

Section: Multi-grain Ir-rfcontrasting

confidence: 89%

pIRIR and IR-RF dating of archaeological deposits at Badahlin and Gu Myaung Caves – First luminescence ages for Myanmar

Schaarschmidt

et al. 2019

Quaternary Geochronology

View full text Add to dashboard Cite

Reliable chronologies are essential for understanding the timing and routes of human dispersal through Southeast Asia, both of which remain open questions. This study provides luminescence chronologies for two archaeological sites in Myanmar-Badahlin Cave and Gu Myaung Cave-from which Palaeolithic artefacts have been recovered. We applied single-grain post-infrared infrared stimulated luminescence (pIRIR) and multi-grain infrared-radiofluorescence (IR-RF) dating methods to potassium-rich feldspar (Kfeldspar) grains extracted from the sedimentary deposits at these two sites. Luminescence characteristics of the K-feldspar extracts showed that the procedures were well suited for dating. The single-grain pIRIR ages suggest human occupation of Badahlin and Gu Myaung Caves by ~30 ka and ~25 ka, respectively, although the age estimates for Gu Myaung Cave are much older than the radiocarbon ages. The ages obtained using the IR-RF signal are even older, which we attribute to insufficient bleaching of this signal-and perhaps also the pIRIR signal-and the probable existence of a substantial residual dose at the time of sediment deposition.

show abstract

Section: Multi-grain Ir-rfcontrasting

confidence: 89%

pIRIR and IR-RF dating of archaeological deposits at Badahlin and Gu Myaung Caves – First luminescence ages for Myanmar

Schaarschmidt

et al. 2019

Quaternary Geochronology

View full text Add to dashboard Cite

show abstract

“…The technique was introduced by Trautmann et al . 55 and Erfurt & Krbetschek 20 and a reinvestigation of the IR-RF signal characteristics recently led to an improved measurement protocol, which requires keeping the temperature constant at 70 °C during measurement 21 , 56 , 57 .…”

Section: Methodsmentioning

confidence: 99%

The expansion of later Acheulean hominins into the Arabian Peninsula

Scerri

Shipton

Clark-Balzan³

et al. 2018

Sci Rep

Self Cite

View full text Add to dashboard Cite

The Acheulean is the longest lasting cultural–technological tradition in human evolutionary history. However, considerable gaps remain in understanding the chronology and geographical distribution of Acheulean hominins. We present the first chronometrically dated Acheulean site from the Arabian Peninsula, a vast and poorly known region that forms more than half of Southwest Asia. Results show that Acheulean hominin occupation expanded along hydrological networks into the heart of Arabia from Marine Isotope Stage (MIS) 7 until at least ~190 ka – the youngest documented Acheulean in Southwest Asia. The site of Saffaqah features Acheulean technology, characterized by large flakes, handaxes and cleavers, similar to Acheulean assemblages in Africa. These findings reveal a climatically-mediated later Acheulean expansion into a poorly known region, amplifying the documented diversity of Middle Pleistocene hominin behaviour across the Old World and elaborating the terminal archaic landscape encountered by our species as they dispersed out of Africa.

show abstract

“…Alternatively, thermal assistance for electron eviction could be another factor, since it has long been argued that the IRSL luminescence emission is assisted by temperature (Hütt et al, 1988). In addition, we have noticed that the solar simulator of the Lexsyg device increases the temperature of the disk during bleaching (Huot et al, 2015). Thermal assistance, because of a temperature increased during bleaching, would nicely explain the apparent delay in bleaching.…”

Section: Efficiency Of Wavelengthsmentioning

confidence: 85%

“…Only after having sufficiently emptied the dosimetric trap would the overall probability of electron trapping increases again. Evidence for a shallow trap contributing to the luminescence at 865 nm in feldspars is presented by Huot et al (2015).…”

Section: Efficiency Of Wavelengthsmentioning

confidence: 98%

“…Due to the possible superposition of the phosphorescence and the radiofluorescence, these authors recommend to wait at least 1 h after bleaching. Recently, Huot et al (2015) shows that phosphorescence is thermally dependent: as the temperature increases during the bleaching step, so does the waiting time to cool the sample to room temperature. Thus, in this study we decided to measure the bleached sIR-RF signal after a pause from few minutes to 1 h, in function of the bleaching time.…”

Section: Signal Resettingmentioning

confidence: 99%

See 1 more Smart Citation