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  • ESR dating of optically bleached quartz grains: Assessing the impact of different experimental setups on dose evaluations

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    Author(s)
    Guilarte, V
    Duval, M
    Griffith University Author(s)
    Duval, Mathieu
    Year published
    2020
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    Abstract
    In recent years, our investigation has been centred on improving the reliability and accuracy of the ESR method applied to quartz grains. As part of this ongoing investigation, we present an intra-laboratory study to evaluate the impact of different experimental setups on the ESR measurement precision and dose evaluation for ESR dating of optically bleached quartz grains. Repeated measurements of quartz samples have been performed at CENIEH, Spain, using two different Bruker spectrometers (EMXmicro and Elexsys E500) and resonators (standard rectangular ER4102ST and cylindrical Super High QE cavities). Their performance in ...
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    In recent years, our investigation has been centred on improving the reliability and accuracy of the ESR method applied to quartz grains. As part of this ongoing investigation, we present an intra-laboratory study to evaluate the impact of different experimental setups on the ESR measurement precision and dose evaluation for ESR dating of optically bleached quartz grains. Repeated measurements of quartz samples have been performed at CENIEH, Spain, using two different Bruker spectrometers (EMXmicro and Elexsys E500) and resonators (standard rectangular ER4102ST and cylindrical Super High QE cavities). Their performance in terms of sensitivity, measurement repeatability and dose determination are presented in this study. This intra-laboratory work has allowed to evaluate the robustness of our protocol for ESR dating of quartz grains and to study the potential impact of different experimental setups on dose evaluation, which is essential for future standardization of the ESR dating method. Our results indicate that all the different experimental setups provide comparable precision of the ESR intensity measurements. Moreover, all the ESR dose estimates are within 1-sigma error, suggesting that it is possible to compare results obtained by different laboratories when similar analytical procedures are followed. Finally, the higher sensitivity achieved by the SHQE resonator appears to be of particular interest when dealing with samples showing low ESR signal intensities.
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    Journal Title
    Geochronometria
    DOI
    https://doi.org/10.2478/geochr-2020-0005
    Copyright Statement
    © 2019 V. Guilarte and M. Duval. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License (CC BY-NC-ND 3.0) License, which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
    Note
    This publication has been entered in Griffith Research Online as an advanced online version.
    Subject
    Geochemistry
    Geology
    Publication URI
    http://hdl.handle.net/10072/397229
    Collection
    • Journal articles

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