The IR-RF alpha-Efficiency of K-feldspar

Kreutzer, Sebastian; Martin, Loïc; Dubernet, Stéphan; Mercier, Norbert

doi:10.1016/j.radmeas.2018.04.019

Cited by 13 publications

(9 citation statements)

References 65 publications

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“…Based on these findings and if the α-efficiency cannot be determined, an estimated a-value of 0.07 ± 0.01 (applied to fine grain and unetched coarse grains, cf. Kreutzer et al, 2018b) appears to be justified.…”

Section: The Ir-rf Alpha-efficiencymentioning

confidence: 93%

“…So far, only a single study exists determining the -efficiency of K-feldspar using IR-RF. Kreutzer et al (2018b) used an -flux calibrated 241 Am source. The central S -value (Guérin and Valladas, 1980;Valladas and Valladas, 1982) obtained from four fine-grain Kfeldspar samples (84 aliquots) was 9.26 ± 1.62 µGy/(10 3 cm -2 ).…”

Section: The Ir-rf Alpha-efficiencymentioning

confidence: 99%

“…Spatially resolved and single grain studies are limited to preliminary work (e.g., Schilles 2002;Trautmann et al, 2000b) and a manuscript in an open discussion by Mittelstrass and Kreutzer (preprint) and are thus not further discussed here. Applications of IR-RF on polymineral fine-grain samples (4-11 µm) are currently limited to three studies (Schilles, 2002;Kreutzer et al, 2018b;Coussot et al, 2019).…”

Section: Application Of Ir-rf Datingmentioning

confidence: 99%

See 2 more Smart Citations

Infrared radiofluorescence (IR-RF) dating: A review

Murari

Kreutzer

King

et al. 2021

Quaternary Geochronology

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Section: The Ir-rf Alpha-efficiencymentioning

confidence: 93%

Section: The Ir-rf Alpha-efficiencymentioning

confidence: 99%

Section: Application Of Ir-rf Datingmentioning

confidence: 99%

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Infrared radiofluorescence (IR-RF) dating: A review

Murari

Kreutzer

King

et al. 2021

Quaternary Geochronology

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“…The user can set the a-value and its estimated uncertainty according to the most recent and reliable reports (e.g. Kreutzer et al, 2018Kreutzer et al, , 2014Mauz et al, 2006;Rees-Jones, 1995;Schmidt et al, 2018). Here we assume a normal distribution for the uncertainty of the a-value.…”

Section: Dose Rate Conversion and Additional Correctionsmentioning

confidence: 99%

Increased dose rate precision in combined $α$ and $β$ counting in the $μ$Dose system - a probabilistic approach to data analysis

Tudyka,

Bluszcz,

Poręba

et al. 2018

Preprint

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The µDose system was developed to allow the measurement of environmental levels of natural radioactive isotopes. The system records α and β particles along with four decay pairs arising from subsequent decays of 214 Bi/ 214 Po, 220 Rn/ 216 Po, 212 Bi/ 212 Po and 219 Rn/ 215 Po. Under the assumption of secular equilibrium this allows to assess the specific radioactivities of 238 U, 235 U, 232 Th decay chains and 40 K. This assessment provides results with uncertainties which are correlated and, thus, require the development of an error estimation methodology which considers this issue.Here we present two different approaches for uncertainty propagation based on Monte Carlo and Bayesian methods. Both approaches produce statistically indistinguishable results and allow significantly better dose rate precision than when the correlations are not accounted for. In the given example, the dose rate precision is improved by a factor of two.

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“…Frouin et al (2015Frouin et al ( , 2017 used a Freiberg Instruments lexsyg research system to demonstrate that the IR-RF signal fulfils the basic requirements of luminescence dating methods, e.g., signal bleachability, thermal stability and dose dependency. Recent methodological work on the optical resetting of the IR-RF signal and modified protocols for dose estimation yielded promising results (Frouin et al, 2015;Huot et al, 2015;Frouin et al, 2017;Kreutzer et al, 2017b;Kreutzer et al, 2018;Murari et al, 2018). Such observations and the recent progress towards IR-RF as a dating method demand further research on fundamental aspects such as signal resetting and the accessible dose range, as well as assessing the reproducibility of commercial devices.…”

Section: Introductionmentioning

confidence: 99%

Infrared Radiofluorescence (IR-RF) of K-Feldspar: An Interlaboratory Comparison

et al. 2021

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Infrared Radiofluorescence (IR-RF) is a relatively new method for dosimetric dating of the depositional timing of sediments. This contribution presents an interlaboratory comparison of IR-RF measurements of sedimentary feldspar from eight laboratories. A comparison of the variability of instrumental background, bleaching, saturation, and initial rise behaviour of the IR-RF signal was carried out. Two endmember samples, a naturally bleached modern dune sand sample with a zero dose and a naturally saturated sample from a Triassic sandstone (~250 Ma), were used for this interlaboratory comparison. The major findings of this study are that (1) the observed IR-RF signal keeps decreasing beyond 4000 Gy, (2) the saturated sample gives an apparent palaeodose of 1265 ± 329 Gy and (3) in most cases, the natural IR-RF signal of the modern analogue sample (resulting from natural bleaching) is higher than the signal from laboratory-induced bleaching of 6 h, using a solar simulator (SLS). In other words, the laboratory sample bleaching was unable to achieve the level of natural bleaching. The results of the investigations are discussed in detail, along with possible explanations.

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The IR-RF alpha-Efficiency of K-feldspar

Cited by 13 publications

References 65 publications

Infrared radiofluorescence (IR-RF) dating: A review

Infrared radiofluorescence (IR-RF) dating: A review

Increased dose rate precision in combined $α$ and $β$ counting in the $μ$Dose system - a probabilistic approach to data analysis

Infrared Radiofluorescence (IR-RF) of K-Feldspar: An Interlaboratory Comparison

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